1 /*- 2 * Device driver optimized for the Symbios/LSI 53C896/53C895A/53C1010 3 * PCI-SCSI controllers. 4 * 5 * Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr> 6 * 7 * This driver also supports the following Symbios/LSI PCI-SCSI chips: 8 * 53C810A, 53C825A, 53C860, 53C875, 53C876, 53C885, 53C895, 9 * 53C810, 53C815, 53C825 and the 53C1510D is 53C8XX mode. 10 * 11 * 12 * This driver for FreeBSD-CAM is derived from the Linux sym53c8xx driver. 13 * Copyright (C) 1998-1999 Gerard Roudier 14 * 15 * The sym53c8xx driver is derived from the ncr53c8xx driver that had been 16 * a port of the FreeBSD ncr driver to Linux-1.2.13. 17 * 18 * The original ncr driver has been written for 386bsd and FreeBSD by 19 * Wolfgang Stanglmeier <wolf@cologne.de> 20 * Stefan Esser <se@mi.Uni-Koeln.de> 21 * Copyright (C) 1994 Wolfgang Stanglmeier 22 * 23 * The initialisation code, and part of the code that addresses 24 * FreeBSD-CAM services is based on the aic7xxx driver for FreeBSD-CAM 25 * written by Justin T. Gibbs. 26 * 27 * Other major contributions: 28 * 29 * NVRAM detection and reading. 30 * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk> 31 * 32 *----------------------------------------------------------------------------- 33 * 34 * Redistribution and use in source and binary forms, with or without 35 * modification, are permitted provided that the following conditions 36 * are met: 37 * 1. Redistributions of source code must retain the above copyright 38 * notice, this list of conditions and the following disclaimer. 39 * 2. Redistributions in binary form must reproduce the above copyright 40 * notice, this list of conditions and the following disclaimer in the 41 * documentation and/or other materials provided with the distribution. 42 * 3. The name of the author may not be used to endorse or promote products 43 * derived from this software without specific prior written permission. 44 * 45 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 46 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 48 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 49 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 55 * SUCH DAMAGE. 56 * 57 * $FreeBSD: src/sys/dev/sym/sym_hipd.c,v 1.76 2011/10/07 08:59:54 marius Exp $ 58 */ 59 60 #define SYM_DRIVER_NAME "sym-1.6.5-20000902" 61 62 /* #define SYM_DEBUG_GENERIC_SUPPORT */ 63 64 #include <sys/param.h> 65 66 /* 67 * Driver configuration options. 68 */ 69 #include "opt_sym.h" 70 #include <dev/disk/sym/sym_conf.h> 71 72 73 #include <sys/systm.h> 74 #include <sys/malloc.h> 75 #include <sys/endian.h> 76 #include <sys/kernel.h> 77 #include <sys/lock.h> 78 #include <sys/mutex.h> 79 #include <sys/module.h> 80 #include <sys/bus.h> 81 82 #include <sys/proc.h> 83 84 #include <bus/pci/pcireg.h> 85 #include <bus/pci/pcivar.h> 86 87 #ifdef __sparc64__ 88 #include <dev/ofw/openfirm.h> 89 #include <machine/ofw_machdep.h> 90 #endif 91 92 #include <sys/rman.h> 93 94 #include <bus/cam/cam.h> 95 #include <bus/cam/cam_ccb.h> 96 #include <bus/cam/cam_sim.h> 97 #include <bus/cam/cam_xpt_sim.h> 98 #include <bus/cam/cam_debug.h> 99 100 #include <bus/cam/scsi/scsi_all.h> 101 #include <bus/cam/scsi/scsi_message.h> 102 103 /* Short and quite clear integer types */ 104 typedef int8_t s8; 105 typedef int16_t s16; 106 typedef int32_t s32; 107 typedef u_int8_t u8; 108 typedef u_int16_t u16; 109 typedef u_int32_t u32; 110 111 /* 112 * Driver definitions. 113 */ 114 #include <dev/disk/sym/sym_defs.h> 115 #include <dev/disk/sym/sym_fw.h> 116 117 /* 118 * IA32 architecture does not reorder STORES and prevents 119 * LOADS from passing STORES. It is called `program order' 120 * by Intel and allows device drivers to deal with memory 121 * ordering by only ensuring that the code is not reordered 122 * by the compiler when ordering is required. 123 * Other architectures implement a weaker ordering that 124 * requires memory barriers (and also IO barriers when they 125 * make sense) to be used. 126 */ 127 128 #if defined __i386__ || defined __x86_64__ 129 #define MEMORY_BARRIER() do { ; } while(0) 130 #elif defined __powerpc__ 131 #define MEMORY_BARRIER() __asm__ volatile("eieio; sync" : : : "memory") 132 #elif defined __ia64__ 133 #define MEMORY_BARRIER() __asm__ volatile("mf.a; mf" : : : "memory") 134 #elif defined __sparc64__ 135 #define MEMORY_BARRIER() __asm__ volatile("membar #Sync" : : : "memory") 136 #else 137 #error "Not supported platform" 138 #endif 139 140 /* 141 * A la VMS/CAM-3 queue management. 142 */ 143 144 typedef struct sym_quehead { 145 struct sym_quehead *flink; /* Forward pointer */ 146 struct sym_quehead *blink; /* Backward pointer */ 147 } SYM_QUEHEAD; 148 149 #define sym_que_init(ptr) do { \ 150 (ptr)->flink = (ptr); (ptr)->blink = (ptr); \ 151 } while (0) 152 153 static __inline struct sym_quehead *sym_que_first(struct sym_quehead *head) 154 { 155 return (head->flink == head) ? NULL : head->flink; 156 } 157 158 static __inline struct sym_quehead *sym_que_last(struct sym_quehead *head) 159 { 160 return (head->blink == head) ? NULL : head->blink; 161 } 162 163 static __inline void __sym_que_add(struct sym_quehead * new, 164 struct sym_quehead * blink, 165 struct sym_quehead * flink) 166 { 167 flink->blink = new; 168 new->flink = flink; 169 new->blink = blink; 170 blink->flink = new; 171 } 172 173 static __inline void __sym_que_del(struct sym_quehead * blink, 174 struct sym_quehead * flink) 175 { 176 flink->blink = blink; 177 blink->flink = flink; 178 } 179 180 static __inline int sym_que_empty(struct sym_quehead *head) 181 { 182 return head->flink == head; 183 } 184 185 static __inline void sym_que_splice(struct sym_quehead *list, 186 struct sym_quehead *head) 187 { 188 struct sym_quehead *first = list->flink; 189 190 if (first != list) { 191 struct sym_quehead *last = list->blink; 192 struct sym_quehead *at = head->flink; 193 194 first->blink = head; 195 head->flink = first; 196 197 last->flink = at; 198 at->blink = last; 199 } 200 } 201 202 #define sym_que_entry(ptr, type, member) \ 203 ((type *)((char *)(ptr)-(size_t)(&((type *)0)->member))) 204 205 206 #define sym_insque(new, pos) __sym_que_add(new, pos, (pos)->flink) 207 208 #define sym_remque(el) __sym_que_del((el)->blink, (el)->flink) 209 210 #define sym_insque_head(new, head) __sym_que_add(new, head, (head)->flink) 211 212 static __inline struct sym_quehead *sym_remque_head(struct sym_quehead *head) 213 { 214 struct sym_quehead *elem = head->flink; 215 216 if (elem != head) 217 __sym_que_del(head, elem->flink); 218 else 219 elem = NULL; 220 return elem; 221 } 222 223 #define sym_insque_tail(new, head) __sym_que_add(new, (head)->blink, head) 224 225 static __inline struct sym_quehead *sym_remque_tail(struct sym_quehead *head) 226 { 227 struct sym_quehead *elem = head->blink; 228 229 if (elem != head) 230 __sym_que_del(elem->blink, head); 231 else 232 elem = NULL; 233 return elem; 234 } 235 236 /* 237 * This one may be useful. 238 */ 239 #define FOR_EACH_QUEUED_ELEMENT(head, qp) \ 240 for (qp = (head)->flink; qp != (head); qp = qp->flink) 241 /* 242 * FreeBSD does not offer our kind of queue in the CAM CCB. 243 * So, we have to cast. 244 */ 245 #define sym_qptr(p) ((struct sym_quehead *) (p)) 246 247 /* 248 * Simple bitmap operations. 249 */ 250 #define sym_set_bit(p, n) (((u32 *)(p))[(n)>>5] |= (1<<((n)&0x1f))) 251 #define sym_clr_bit(p, n) (((u32 *)(p))[(n)>>5] &= ~(1<<((n)&0x1f))) 252 #define sym_is_bit(p, n) (((u32 *)(p))[(n)>>5] & (1<<((n)&0x1f))) 253 254 /* 255 * Number of tasks per device we want to handle. 256 */ 257 #if SYM_CONF_MAX_TAG_ORDER > 8 258 #error "more than 256 tags per logical unit not allowed." 259 #endif 260 #define SYM_CONF_MAX_TASK (1<<SYM_CONF_MAX_TAG_ORDER) 261 262 /* 263 * Donnot use more tasks that we can handle. 264 */ 265 #ifndef SYM_CONF_MAX_TAG 266 #define SYM_CONF_MAX_TAG SYM_CONF_MAX_TASK 267 #endif 268 #if SYM_CONF_MAX_TAG > SYM_CONF_MAX_TASK 269 #undef SYM_CONF_MAX_TAG 270 #define SYM_CONF_MAX_TAG SYM_CONF_MAX_TASK 271 #endif 272 273 /* 274 * This one means 'NO TAG for this job' 275 */ 276 #define NO_TAG (256) 277 278 /* 279 * Number of SCSI targets. 280 */ 281 #if SYM_CONF_MAX_TARGET > 16 282 #error "more than 16 targets not allowed." 283 #endif 284 285 /* 286 * Number of logical units per target. 287 */ 288 #if SYM_CONF_MAX_LUN > 64 289 #error "more than 64 logical units per target not allowed." 290 #endif 291 292 /* 293 * Asynchronous pre-scaler (ns). Shall be 40 for 294 * the SCSI timings to be compliant. 295 */ 296 #define SYM_CONF_MIN_ASYNC (40) 297 298 /* 299 * Number of entries in the START and DONE queues. 300 * 301 * We limit to 1 PAGE in order to succeed allocation of 302 * these queues. Each entry is 8 bytes long (2 DWORDS). 303 */ 304 #ifdef SYM_CONF_MAX_START 305 #define SYM_CONF_MAX_QUEUE (SYM_CONF_MAX_START+2) 306 #else 307 #define SYM_CONF_MAX_QUEUE (7*SYM_CONF_MAX_TASK+2) 308 #define SYM_CONF_MAX_START (SYM_CONF_MAX_QUEUE-2) 309 #endif 310 311 #if SYM_CONF_MAX_QUEUE > PAGE_SIZE/8 312 #undef SYM_CONF_MAX_QUEUE 313 #define SYM_CONF_MAX_QUEUE PAGE_SIZE/8 314 #undef SYM_CONF_MAX_START 315 #define SYM_CONF_MAX_START (SYM_CONF_MAX_QUEUE-2) 316 #endif 317 318 /* 319 * For this one, we want a short name :-) 320 */ 321 #define MAX_QUEUE SYM_CONF_MAX_QUEUE 322 323 /* 324 * Active debugging tags and verbosity. 325 */ 326 #define DEBUG_ALLOC (0x0001) 327 #define DEBUG_PHASE (0x0002) 328 #define DEBUG_POLL (0x0004) 329 #define DEBUG_QUEUE (0x0008) 330 #define DEBUG_RESULT (0x0010) 331 #define DEBUG_SCATTER (0x0020) 332 #define DEBUG_SCRIPT (0x0040) 333 #define DEBUG_TINY (0x0080) 334 #define DEBUG_TIMING (0x0100) 335 #define DEBUG_NEGO (0x0200) 336 #define DEBUG_TAGS (0x0400) 337 #define DEBUG_POINTER (0x0800) 338 339 #if 0 340 static int sym_debug = 0; 341 #define DEBUG_FLAGS sym_debug 342 #else 343 /* #define DEBUG_FLAGS (0x0631) */ 344 #define DEBUG_FLAGS (0x0000) 345 346 #endif 347 #define sym_verbose (np->verbose) 348 349 /* 350 * Insert a delay in micro-seconds and milli-seconds. 351 */ 352 static void UDELAY(int us) { DELAY(us); } 353 static void MDELAY(int ms) { while (ms--) UDELAY(1000); } 354 355 /* 356 * Simple power of two buddy-like allocator. 357 * 358 * This simple code is not intended to be fast, but to 359 * provide power of 2 aligned memory allocations. 360 * Since the SCRIPTS processor only supplies 8 bit arithmetic, 361 * this allocator allows simple and fast address calculations 362 * from the SCRIPTS code. In addition, cache line alignment 363 * is guaranteed for power of 2 cache line size. 364 * 365 * This allocator has been developed for the Linux sym53c8xx 366 * driver, since this O/S does not provide naturally aligned 367 * allocations. 368 * It has the advantage of allowing the driver to use private 369 * pages of memory that will be useful if we ever need to deal 370 * with IO MMUs for PCI. 371 */ 372 373 #define MEMO_SHIFT 4 /* 16 bytes minimum memory chunk */ 374 #define MEMO_PAGE_ORDER 0 /* 1 PAGE maximum */ 375 #if 0 376 #define MEMO_FREE_UNUSED /* Free unused pages immediately */ 377 #endif 378 #define MEMO_WARN 1 379 #define MEMO_CLUSTER_SHIFT (PAGE_SHIFT+MEMO_PAGE_ORDER) 380 #define MEMO_CLUSTER_SIZE (1UL << MEMO_CLUSTER_SHIFT) 381 #define MEMO_CLUSTER_MASK (MEMO_CLUSTER_SIZE-1) 382 383 #define get_pages() kmalloc(MEMO_CLUSTER_SIZE, M_DEVBUF, M_INTWAIT) 384 #define free_pages(p) kfree((p), M_DEVBUF) 385 386 typedef u_long m_addr_t; /* Enough bits to bit-hack addresses */ 387 388 typedef struct m_link { /* Link between free memory chunks */ 389 struct m_link *next; 390 } m_link_s; 391 392 typedef struct m_vtob { /* Virtual to Bus address translation */ 393 struct m_vtob *next; 394 bus_dmamap_t dmamap; /* Map for this chunk */ 395 m_addr_t vaddr; /* Virtual address */ 396 m_addr_t baddr; /* Bus physical address */ 397 } m_vtob_s; 398 /* Hash this stuff a bit to speed up translations */ 399 #define VTOB_HASH_SHIFT 5 400 #define VTOB_HASH_SIZE (1UL << VTOB_HASH_SHIFT) 401 #define VTOB_HASH_MASK (VTOB_HASH_SIZE-1) 402 #define VTOB_HASH_CODE(m) \ 403 ((((m_addr_t) (m)) >> MEMO_CLUSTER_SHIFT) & VTOB_HASH_MASK) 404 405 typedef struct m_pool { /* Memory pool of a given kind */ 406 bus_dma_tag_t dev_dmat; /* Identifies the pool */ 407 bus_dma_tag_t dmat; /* Tag for our fixed allocations */ 408 m_addr_t (*getp)(struct m_pool *); 409 #ifdef MEMO_FREE_UNUSED 410 void (*freep)(struct m_pool *, m_addr_t); 411 #endif 412 #define M_GETP() mp->getp(mp) 413 #define M_FREEP(p) mp->freep(mp, p) 414 int nump; 415 m_vtob_s *(vtob[VTOB_HASH_SIZE]); 416 struct m_pool *next; 417 struct m_link h[MEMO_CLUSTER_SHIFT - MEMO_SHIFT + 1]; 418 } m_pool_s; 419 420 static void *___sym_malloc(m_pool_s *mp, int size) 421 { 422 int i = 0; 423 int s = (1 << MEMO_SHIFT); 424 int j; 425 m_addr_t a; 426 m_link_s *h = mp->h; 427 428 if (size > MEMO_CLUSTER_SIZE) 429 return NULL; 430 431 while (size > s) { 432 s <<= 1; 433 ++i; 434 } 435 436 j = i; 437 while (!h[j].next) { 438 if (s == MEMO_CLUSTER_SIZE) { 439 h[j].next = (m_link_s *) M_GETP(); 440 if (h[j].next) 441 h[j].next->next = NULL; 442 break; 443 } 444 ++j; 445 s <<= 1; 446 } 447 a = (m_addr_t) h[j].next; 448 if (a) { 449 h[j].next = h[j].next->next; 450 while (j > i) { 451 j -= 1; 452 s >>= 1; 453 h[j].next = (m_link_s *) (a+s); 454 h[j].next->next = NULL; 455 } 456 } 457 #ifdef DEBUG 458 kprintf("___sym_malloc(%d) = %p\n", size, (void *) a); 459 #endif 460 return (void *) a; 461 } 462 463 static void ___sym_mfree(m_pool_s *mp, void *ptr, int size) 464 { 465 int i = 0; 466 int s = (1 << MEMO_SHIFT); 467 m_link_s *q; 468 m_addr_t a, b; 469 m_link_s *h = mp->h; 470 471 #ifdef DEBUG 472 kprintf("___sym_mfree(%p, %d)\n", ptr, size); 473 #endif 474 475 if (size > MEMO_CLUSTER_SIZE) 476 return; 477 478 while (size > s) { 479 s <<= 1; 480 ++i; 481 } 482 483 a = (m_addr_t) ptr; 484 485 while (1) { 486 #ifdef MEMO_FREE_UNUSED 487 if (s == MEMO_CLUSTER_SIZE) { 488 M_FREEP(a); 489 break; 490 } 491 #endif 492 b = a ^ s; 493 q = &h[i]; 494 while (q->next && q->next != (m_link_s *) b) { 495 q = q->next; 496 } 497 if (!q->next) { 498 ((m_link_s *) a)->next = h[i].next; 499 h[i].next = (m_link_s *) a; 500 break; 501 } 502 q->next = q->next->next; 503 a = a & b; 504 s <<= 1; 505 ++i; 506 } 507 } 508 509 static void *__sym_calloc2(m_pool_s *mp, int size, char *name, int uflags) 510 { 511 void *p; 512 513 p = ___sym_malloc(mp, size); 514 515 if (DEBUG_FLAGS & DEBUG_ALLOC) 516 kprintf ("new %-10s[%4d] @%p.\n", name, size, p); 517 518 if (p) 519 bzero(p, size); 520 else if (uflags & MEMO_WARN) 521 kprintf ("__sym_calloc2: failed to allocate %s[%d]\n", name, size); 522 523 return p; 524 } 525 526 #define __sym_calloc(mp, s, n) __sym_calloc2(mp, s, n, MEMO_WARN) 527 528 static void __sym_mfree(m_pool_s *mp, void *ptr, int size, char *name) 529 { 530 if (DEBUG_FLAGS & DEBUG_ALLOC) 531 kprintf ("freeing %-10s[%4d] @%p.\n", name, size, ptr); 532 533 ___sym_mfree(mp, ptr, size); 534 535 } 536 537 /* 538 * Default memory pool we donnot need to involve in DMA. 539 */ 540 /* 541 * With the `bus dma abstraction', we use a separate pool for 542 * memory we donnot need to involve in DMA. 543 */ 544 static m_addr_t ___mp0_getp(m_pool_s *mp) 545 { 546 m_addr_t m = (m_addr_t) get_pages(); 547 if (m) 548 ++mp->nump; 549 return m; 550 } 551 552 #ifdef MEMO_FREE_UNUSED 553 static void ___mp0_freep(m_pool_s *mp, m_addr_t m) 554 { 555 free_pages(m); 556 --mp->nump; 557 } 558 #endif 559 560 #ifdef MEMO_FREE_UNUSED 561 static m_pool_s mp0 = {0, 0, ___mp0_getp, ___mp0_freep}; 562 #else 563 static m_pool_s mp0 = {0, 0, ___mp0_getp}; 564 #endif 565 566 567 /* 568 * Actual memory allocation routine for non-DMAed memory. 569 */ 570 static void *sym_calloc(int size, char *name) 571 { 572 void *m; 573 /* Lock */ 574 m = __sym_calloc(&mp0, size, name); 575 /* Unlock */ 576 return m; 577 } 578 579 /* 580 * Actual memory allocation routine for non-DMAed memory. 581 */ 582 static void sym_mfree(void *ptr, int size, char *name) 583 { 584 /* Lock */ 585 __sym_mfree(&mp0, ptr, size, name); 586 /* Unlock */ 587 } 588 589 /* 590 * DMAable pools. 591 */ 592 /* 593 * With `bus dma abstraction', we use a separate pool per parent 594 * BUS handle. A reverse table (hashed) is maintained for virtual 595 * to BUS address translation. 596 */ 597 static void getbaddrcb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 598 { 599 bus_addr_t *baddr; 600 baddr = (bus_addr_t *)arg; 601 *baddr = segs->ds_addr; 602 } 603 604 static m_addr_t ___dma_getp(m_pool_s *mp) 605 { 606 m_vtob_s *vbp; 607 void *vaddr = NULL; 608 bus_addr_t baddr = 0; 609 610 vbp = __sym_calloc(&mp0, sizeof(*vbp), "VTOB"); 611 if (!vbp) 612 goto out_err; 613 614 if (bus_dmamem_alloc(mp->dmat, &vaddr, 615 BUS_DMA_COHERENT | BUS_DMA_WAITOK, &vbp->dmamap)) 616 goto out_err; 617 bus_dmamap_load(mp->dmat, vbp->dmamap, vaddr, 618 MEMO_CLUSTER_SIZE, getbaddrcb, &baddr, BUS_DMA_NOWAIT); 619 if (baddr) { 620 int hc = VTOB_HASH_CODE(vaddr); 621 vbp->vaddr = (m_addr_t) vaddr; 622 vbp->baddr = (m_addr_t) baddr; 623 vbp->next = mp->vtob[hc]; 624 mp->vtob[hc] = vbp; 625 ++mp->nump; 626 return (m_addr_t) vaddr; 627 } 628 out_err: 629 if (baddr) 630 bus_dmamap_unload(mp->dmat, vbp->dmamap); 631 if (vaddr) 632 bus_dmamem_free(mp->dmat, vaddr, vbp->dmamap); 633 if (vbp) { 634 if (vbp->dmamap) 635 bus_dmamap_destroy(mp->dmat, vbp->dmamap); 636 __sym_mfree(&mp0, vbp, sizeof(*vbp), "VTOB"); 637 } 638 return 0; 639 } 640 641 #ifdef MEMO_FREE_UNUSED 642 static void ___dma_freep(m_pool_s *mp, m_addr_t m) 643 { 644 m_vtob_s **vbpp, *vbp; 645 int hc = VTOB_HASH_CODE(m); 646 647 vbpp = &mp->vtob[hc]; 648 while (*vbpp && (*vbpp)->vaddr != m) 649 vbpp = &(*vbpp)->next; 650 if (*vbpp) { 651 vbp = *vbpp; 652 *vbpp = (*vbpp)->next; 653 bus_dmamap_unload(mp->dmat, vbp->dmamap); 654 bus_dmamem_free(mp->dmat, (void *) vbp->vaddr, vbp->dmamap); 655 bus_dmamap_destroy(mp->dmat, vbp->dmamap); 656 __sym_mfree(&mp0, vbp, sizeof(*vbp), "VTOB"); 657 --mp->nump; 658 } 659 } 660 #endif 661 662 static __inline m_pool_s *___get_dma_pool(bus_dma_tag_t dev_dmat) 663 { 664 m_pool_s *mp; 665 for (mp = mp0.next; mp && mp->dev_dmat != dev_dmat; mp = mp->next); 666 return mp; 667 } 668 669 static m_pool_s *___cre_dma_pool(bus_dma_tag_t dev_dmat) 670 { 671 m_pool_s *mp = NULL; 672 673 mp = __sym_calloc(&mp0, sizeof(*mp), "MPOOL"); 674 if (mp) { 675 mp->dev_dmat = dev_dmat; 676 if (!bus_dma_tag_create(dev_dmat, 1, MEMO_CLUSTER_SIZE, 677 BUS_SPACE_MAXADDR_32BIT, 678 BUS_SPACE_MAXADDR, 679 NULL, NULL, MEMO_CLUSTER_SIZE, 1, 680 MEMO_CLUSTER_SIZE, 0, 681 &mp->dmat)) { 682 mp->getp = ___dma_getp; 683 #ifdef MEMO_FREE_UNUSED 684 mp->freep = ___dma_freep; 685 #endif 686 mp->next = mp0.next; 687 mp0.next = mp; 688 return mp; 689 } 690 } 691 if (mp) 692 __sym_mfree(&mp0, mp, sizeof(*mp), "MPOOL"); 693 return NULL; 694 } 695 696 #ifdef MEMO_FREE_UNUSED 697 static void ___del_dma_pool(m_pool_s *p) 698 { 699 struct m_pool **pp = &mp0.next; 700 701 while (*pp && *pp != p) 702 pp = &(*pp)->next; 703 if (*pp) { 704 *pp = (*pp)->next; 705 bus_dma_tag_destroy(p->dmat); 706 __sym_mfree(&mp0, p, sizeof(*p), "MPOOL"); 707 } 708 } 709 #endif 710 711 static void *__sym_calloc_dma(bus_dma_tag_t dev_dmat, int size, char *name) 712 { 713 struct m_pool *mp; 714 void *m = NULL; 715 716 /* Lock */ 717 mp = ___get_dma_pool(dev_dmat); 718 if (!mp) 719 mp = ___cre_dma_pool(dev_dmat); 720 if (mp) 721 m = __sym_calloc(mp, size, name); 722 #ifdef MEMO_FREE_UNUSED 723 if (mp && !mp->nump) 724 ___del_dma_pool(mp); 725 #endif 726 /* Unlock */ 727 728 return m; 729 } 730 731 static void 732 __sym_mfree_dma(bus_dma_tag_t dev_dmat, void *m, int size, char *name) 733 { 734 struct m_pool *mp; 735 736 /* Lock */ 737 mp = ___get_dma_pool(dev_dmat); 738 if (mp) 739 __sym_mfree(mp, m, size, name); 740 #ifdef MEMO_FREE_UNUSED 741 if (mp && !mp->nump) 742 ___del_dma_pool(mp); 743 #endif 744 /* Unlock */ 745 } 746 747 static m_addr_t __vtobus(bus_dma_tag_t dev_dmat, void *m) 748 { 749 m_pool_s *mp; 750 int hc = VTOB_HASH_CODE(m); 751 m_vtob_s *vp = NULL; 752 m_addr_t a = ((m_addr_t) m) & ~MEMO_CLUSTER_MASK; 753 754 /* Lock */ 755 mp = ___get_dma_pool(dev_dmat); 756 if (mp) { 757 vp = mp->vtob[hc]; 758 while (vp && vp->vaddr != a) 759 vp = vp->next; 760 } 761 /* Unlock */ 762 if (!vp) 763 panic("sym: VTOBUS FAILED!"); 764 return vp ? vp->baddr + (((m_addr_t) m) - a) : 0; 765 } 766 767 768 /* 769 * Verbs for DMAable memory handling. 770 * The _uvptv_ macro avoids a nasty warning about pointer to volatile 771 * being discarded. 772 */ 773 #define _uvptv_(p) ((void *)((vm_offset_t)(p))) 774 #define _sym_calloc_dma(np, s, n) __sym_calloc_dma(np->bus_dmat, s, n) 775 #define _sym_mfree_dma(np, p, s, n) \ 776 __sym_mfree_dma(np->bus_dmat, _uvptv_(p), s, n) 777 #define sym_calloc_dma(s, n) _sym_calloc_dma(np, s, n) 778 #define sym_mfree_dma(p, s, n) _sym_mfree_dma(np, p, s, n) 779 #define _vtobus(np, p) __vtobus(np->bus_dmat, _uvptv_(p)) 780 #define vtobus(p) _vtobus(np, p) 781 782 783 /* 784 * Print a buffer in hexadecimal format. 785 */ 786 static void sym_printb_hex (u_char *p, int n) 787 { 788 while (n-- > 0) 789 kprintf (" %x", *p++); 790 } 791 792 /* 793 * Same with a label at beginning and .\n at end. 794 */ 795 static void sym_printl_hex (char *label, u_char *p, int n) 796 { 797 kprintf ("%s", label); 798 sym_printb_hex (p, n); 799 kprintf (".\n"); 800 } 801 802 /* 803 * Return a string for SCSI BUS mode. 804 */ 805 static const char *sym_scsi_bus_mode(int mode) 806 { 807 switch(mode) { 808 case SMODE_HVD: return "HVD"; 809 case SMODE_SE: return "SE"; 810 case SMODE_LVD: return "LVD"; 811 } 812 return "??"; 813 } 814 815 /* 816 * Some poor and bogus sync table that refers to Tekram NVRAM layout. 817 */ 818 #ifdef SYM_CONF_NVRAM_SUPPORT 819 static const u_char Tekram_sync[16] = 820 {25,31,37,43, 50,62,75,125, 12,15,18,21, 6,7,9,10}; 821 #endif 822 823 /* 824 * Union of supported NVRAM formats. 825 */ 826 struct sym_nvram { 827 int type; 828 #define SYM_SYMBIOS_NVRAM (1) 829 #define SYM_TEKRAM_NVRAM (2) 830 #ifdef SYM_CONF_NVRAM_SUPPORT 831 union { 832 Symbios_nvram Symbios; 833 Tekram_nvram Tekram; 834 } data; 835 #endif 836 }; 837 838 /* 839 * This one is hopefully useless, but actually useful. :-) 840 */ 841 #ifndef assert 842 #define assert(expression) { \ 843 if (!(expression)) { \ 844 (void)panic( \ 845 "assertion \"%s\" failed: file \"%s\", line %d", \ 846 #expression, \ 847 __FILE__, __LINE__); \ 848 } \ 849 } 850 #endif 851 852 /* 853 * Some provision for a possible big endian mode supported by 854 * Symbios chips (never seen, by the way). 855 * For now, this stuff does not deserve any comments. :) 856 */ 857 858 #define sym_offb(o) (o) 859 #define sym_offw(o) (o) 860 861 /* 862 * Some provision for support for BIG ENDIAN CPU. 863 */ 864 865 #define cpu_to_scr(dw) htole32(dw) 866 #define scr_to_cpu(dw) le32toh(dw) 867 868 /* 869 * Access to the chip IO registers and on-chip RAM. 870 * We use the `bus space' interface under FreeBSD-4 and 871 * later kernel versions. 872 */ 873 874 875 #if defined(SYM_CONF_IOMAPPED) 876 877 #define INB_OFF(o) bus_read_1(np->io_res, (o)) 878 #define INW_OFF(o) bus_read_2(np->io_res, (o)) 879 #define INL_OFF(o) bus_read_4(np->io_res, (o)) 880 881 #define OUTB_OFF(o, v) bus_write_1(np->io_res, (o), (v)) 882 #define OUTW_OFF(o, v) bus_write_2(np->io_res, (o), (v)) 883 #define OUTL_OFF(o, v) bus_write_4(np->io_res, (o), (v)) 884 885 #else /* Memory mapped IO */ 886 887 #define INB_OFF(o) bus_read_1(np->mmio_res, (o)) 888 #define INW_OFF(o) bus_read_2(np->mmio_res, (o)) 889 #define INL_OFF(o) bus_read_4(np->mmio_res, (o)) 890 891 #define OUTB_OFF(o, v) bus_write_1(np->mmio_res, (o), (v)) 892 #define OUTW_OFF(o, v) bus_write_2(np->mmio_res, (o), (v)) 893 #define OUTL_OFF(o, v) bus_write_4(np->mmio_res, (o), (v)) 894 895 #endif /* SYM_CONF_IOMAPPED */ 896 897 #define OUTRAM_OFF(o, a, l) \ 898 bus_write_region_1(np->ram_res, (o), (a), (l)) 899 900 901 /* 902 * Common definitions for both bus space and legacy IO methods. 903 */ 904 #define INB(r) INB_OFF(offsetof(struct sym_reg,r)) 905 #define INW(r) INW_OFF(offsetof(struct sym_reg,r)) 906 #define INL(r) INL_OFF(offsetof(struct sym_reg,r)) 907 908 #define OUTB(r, v) OUTB_OFF(offsetof(struct sym_reg,r), (v)) 909 #define OUTW(r, v) OUTW_OFF(offsetof(struct sym_reg,r), (v)) 910 #define OUTL(r, v) OUTL_OFF(offsetof(struct sym_reg,r), (v)) 911 912 #define OUTONB(r, m) OUTB(r, INB(r) | (m)) 913 #define OUTOFFB(r, m) OUTB(r, INB(r) & ~(m)) 914 #define OUTONW(r, m) OUTW(r, INW(r) | (m)) 915 #define OUTOFFW(r, m) OUTW(r, INW(r) & ~(m)) 916 #define OUTONL(r, m) OUTL(r, INL(r) | (m)) 917 #define OUTOFFL(r, m) OUTL(r, INL(r) & ~(m)) 918 919 /* 920 * We normally want the chip to have a consistent view 921 * of driver internal data structures when we restart it. 922 * Thus these macros. 923 */ 924 #define OUTL_DSP(v) \ 925 do { \ 926 MEMORY_BARRIER(); \ 927 OUTL (nc_dsp, (v)); \ 928 } while (0) 929 930 #define OUTONB_STD() \ 931 do { \ 932 MEMORY_BARRIER(); \ 933 OUTONB (nc_dcntl, (STD|NOCOM)); \ 934 } while (0) 935 936 /* 937 * Command control block states. 938 */ 939 #define HS_IDLE (0) 940 #define HS_BUSY (1) 941 #define HS_NEGOTIATE (2) /* sync/wide data transfer*/ 942 #define HS_DISCONNECT (3) /* Disconnected by target */ 943 #define HS_WAIT (4) /* waiting for resource */ 944 945 #define HS_DONEMASK (0x80) 946 #define HS_COMPLETE (4|HS_DONEMASK) 947 #define HS_SEL_TIMEOUT (5|HS_DONEMASK) /* Selection timeout */ 948 #define HS_UNEXPECTED (6|HS_DONEMASK) /* Unexpected disconnect */ 949 #define HS_COMP_ERR (7|HS_DONEMASK) /* Completed with error */ 950 951 /* 952 * Software Interrupt Codes 953 */ 954 #define SIR_BAD_SCSI_STATUS (1) 955 #define SIR_SEL_ATN_NO_MSG_OUT (2) 956 #define SIR_MSG_RECEIVED (3) 957 #define SIR_MSG_WEIRD (4) 958 #define SIR_NEGO_FAILED (5) 959 #define SIR_NEGO_PROTO (6) 960 #define SIR_SCRIPT_STOPPED (7) 961 #define SIR_REJECT_TO_SEND (8) 962 #define SIR_SWIDE_OVERRUN (9) 963 #define SIR_SODL_UNDERRUN (10) 964 #define SIR_RESEL_NO_MSG_IN (11) 965 #define SIR_RESEL_NO_IDENTIFY (12) 966 #define SIR_RESEL_BAD_LUN (13) 967 #define SIR_TARGET_SELECTED (14) 968 #define SIR_RESEL_BAD_I_T_L (15) 969 #define SIR_RESEL_BAD_I_T_L_Q (16) 970 #define SIR_ABORT_SENT (17) 971 #define SIR_RESEL_ABORTED (18) 972 #define SIR_MSG_OUT_DONE (19) 973 #define SIR_COMPLETE_ERROR (20) 974 #define SIR_DATA_OVERRUN (21) 975 #define SIR_BAD_PHASE (22) 976 #define SIR_MAX (22) 977 978 /* 979 * Extended error bit codes. 980 * xerr_status field of struct sym_ccb. 981 */ 982 #define XE_EXTRA_DATA (1) /* unexpected data phase */ 983 #define XE_BAD_PHASE (1<<1) /* illegal phase (4/5) */ 984 #define XE_PARITY_ERR (1<<2) /* unrecovered SCSI parity error */ 985 #define XE_SODL_UNRUN (1<<3) /* ODD transfer in DATA OUT phase */ 986 #define XE_SWIDE_OVRUN (1<<4) /* ODD transfer in DATA IN phase */ 987 988 /* 989 * Negotiation status. 990 * nego_status field of struct sym_ccb. 991 */ 992 #define NS_SYNC (1) 993 #define NS_WIDE (2) 994 #define NS_PPR (3) 995 996 /* 997 * A CCB hashed table is used to retrieve CCB address 998 * from DSA value. 999 */ 1000 #define CCB_HASH_SHIFT 8 1001 #define CCB_HASH_SIZE (1UL << CCB_HASH_SHIFT) 1002 #define CCB_HASH_MASK (CCB_HASH_SIZE-1) 1003 #define CCB_HASH_CODE(dsa) (((dsa) >> 9) & CCB_HASH_MASK) 1004 1005 /* 1006 * Device flags. 1007 */ 1008 #define SYM_DISC_ENABLED (1) 1009 #define SYM_TAGS_ENABLED (1<<1) 1010 #define SYM_SCAN_BOOT_DISABLED (1<<2) 1011 #define SYM_SCAN_LUNS_DISABLED (1<<3) 1012 1013 /* 1014 * Host adapter miscellaneous flags. 1015 */ 1016 #define SYM_AVOID_BUS_RESET (1) 1017 #define SYM_SCAN_TARGETS_HILO (1<<1) 1018 1019 /* 1020 * Device quirks. 1021 * Some devices, for example the CHEETAH 2 LVD, disconnects without 1022 * saving the DATA POINTER then reselects and terminates the IO. 1023 * On reselection, the automatic RESTORE DATA POINTER makes the 1024 * CURRENT DATA POINTER not point at the end of the IO. 1025 * This behaviour just breaks our calculation of the residual. 1026 * For now, we just force an AUTO SAVE on disconnection and will 1027 * fix that in a further driver version. 1028 */ 1029 #define SYM_QUIRK_AUTOSAVE 1 1030 1031 /* 1032 * Misc. 1033 */ 1034 #define SYM_LOCK() lockmgr(&np->lock, LK_EXCLUSIVE) 1035 #define SYM_LOCK_ASSERT(_what) KKASSERT(lockstatus(&np->lock, curthread) == (_what)); 1036 #define SYM_LOCK_DESTROY() lockuninit(&np->lock) 1037 #define SYM_LOCK_INIT() lockinit(&np->lock, "sym_lock", 0, LK_CANRECURSE) 1038 #if 0 /* XXX swildner */ 1039 #define SYM_LOCK_INITIALIZED() mtx_initialized(&np->lock) 1040 #endif 1041 #define SYM_UNLOCK() lockmgr(&np->lock, LK_RELEASE) 1042 1043 #define SYM_SNOOP_TIMEOUT (10000000) 1044 #define SYM_PCI_IO PCIR_BAR(0) 1045 #define SYM_PCI_MMIO PCIR_BAR(1) 1046 #define SYM_PCI_RAM PCIR_BAR(2) 1047 #define SYM_PCI_RAM64 PCIR_BAR(3) 1048 1049 /* 1050 * Back-pointer from the CAM CCB to our data structures. 1051 */ 1052 #define sym_hcb_ptr spriv_ptr0 1053 /* #define sym_ccb_ptr spriv_ptr1 */ 1054 1055 /* 1056 * We mostly have to deal with pointers. 1057 * Thus these typedef's. 1058 */ 1059 typedef struct sym_tcb *tcb_p; 1060 typedef struct sym_lcb *lcb_p; 1061 typedef struct sym_ccb *ccb_p; 1062 typedef struct sym_hcb *hcb_p; 1063 1064 /* 1065 * Gather negotiable parameters value 1066 */ 1067 struct sym_trans { 1068 u8 scsi_version; 1069 u8 spi_version; 1070 u8 period; 1071 u8 offset; 1072 u8 width; 1073 u8 options; /* PPR options */ 1074 }; 1075 1076 struct sym_tinfo { 1077 struct sym_trans current; 1078 struct sym_trans goal; 1079 struct sym_trans user; 1080 }; 1081 1082 #define BUS_8_BIT MSG_EXT_WDTR_BUS_8_BIT 1083 #define BUS_16_BIT MSG_EXT_WDTR_BUS_16_BIT 1084 1085 /* 1086 * Global TCB HEADER. 1087 * 1088 * Due to lack of indirect addressing on earlier NCR chips, 1089 * this substructure is copied from the TCB to a global 1090 * address after selection. 1091 * For SYMBIOS chips that support LOAD/STORE this copy is 1092 * not needed and thus not performed. 1093 */ 1094 struct sym_tcbh { 1095 /* 1096 * Scripts bus addresses of LUN table accessed from scripts. 1097 * LUN #0 is a special case, since multi-lun devices are rare, 1098 * and we we want to speed-up the general case and not waste 1099 * resources. 1100 */ 1101 u32 luntbl_sa; /* bus address of this table */ 1102 u32 lun0_sa; /* bus address of LCB #0 */ 1103 /* 1104 * Actual SYNC/WIDE IO registers value for this target. 1105 * 'sval', 'wval' and 'uval' are read from SCRIPTS and 1106 * so have alignment constraints. 1107 */ 1108 /*0*/ u_char uval; /* -> SCNTL4 register */ 1109 /*1*/ u_char sval; /* -> SXFER io register */ 1110 /*2*/ u_char filler1; 1111 /*3*/ u_char wval; /* -> SCNTL3 io register */ 1112 }; 1113 1114 /* 1115 * Target Control Block 1116 */ 1117 struct sym_tcb { 1118 /* 1119 * TCB header. 1120 * Assumed at offset 0. 1121 */ 1122 /*0*/ struct sym_tcbh head; 1123 1124 /* 1125 * LUN table used by the SCRIPTS processor. 1126 * An array of bus addresses is used on reselection. 1127 */ 1128 u32 *luntbl; /* LCBs bus address table */ 1129 1130 /* 1131 * LUN table used by the C code. 1132 */ 1133 lcb_p lun0p; /* LCB of LUN #0 (usual case) */ 1134 #if SYM_CONF_MAX_LUN > 1 1135 lcb_p *lunmp; /* Other LCBs [1..MAX_LUN] */ 1136 #endif 1137 1138 /* 1139 * Bitmap that tells about LUNs that succeeded at least 1140 * 1 IO and therefore assumed to be a real device. 1141 * Avoid useless allocation of the LCB structure. 1142 */ 1143 u32 lun_map[(SYM_CONF_MAX_LUN+31)/32]; 1144 1145 /* 1146 * Bitmap that tells about LUNs that haven't yet an LCB 1147 * allocated (not discovered or LCB allocation failed). 1148 */ 1149 u32 busy0_map[(SYM_CONF_MAX_LUN+31)/32]; 1150 1151 /* 1152 * Transfer capabilities (SIP) 1153 */ 1154 struct sym_tinfo tinfo; 1155 1156 /* 1157 * Keep track of the CCB used for the negotiation in order 1158 * to ensure that only 1 negotiation is queued at a time. 1159 */ 1160 ccb_p nego_cp; /* CCB used for the nego */ 1161 1162 /* 1163 * Set when we want to reset the device. 1164 */ 1165 u_char to_reset; 1166 1167 /* 1168 * Other user settable limits and options. 1169 * These limits are read from the NVRAM if present. 1170 */ 1171 u_char usrflags; 1172 u_short usrtags; 1173 }; 1174 1175 /* 1176 * Global LCB HEADER. 1177 * 1178 * Due to lack of indirect addressing on earlier NCR chips, 1179 * this substructure is copied from the LCB to a global 1180 * address after selection. 1181 * For SYMBIOS chips that support LOAD/STORE this copy is 1182 * not needed and thus not performed. 1183 */ 1184 struct sym_lcbh { 1185 /* 1186 * SCRIPTS address jumped by SCRIPTS on reselection. 1187 * For not probed logical units, this address points to 1188 * SCRIPTS that deal with bad LU handling (must be at 1189 * offset zero of the LCB for that reason). 1190 */ 1191 /*0*/ u32 resel_sa; 1192 1193 /* 1194 * Task (bus address of a CCB) read from SCRIPTS that points 1195 * to the unique ITL nexus allowed to be disconnected. 1196 */ 1197 u32 itl_task_sa; 1198 1199 /* 1200 * Task table bus address (read from SCRIPTS). 1201 */ 1202 u32 itlq_tbl_sa; 1203 }; 1204 1205 /* 1206 * Logical Unit Control Block 1207 */ 1208 struct sym_lcb { 1209 /* 1210 * TCB header. 1211 * Assumed at offset 0. 1212 */ 1213 /*0*/ struct sym_lcbh head; 1214 1215 /* 1216 * Task table read from SCRIPTS that contains pointers to 1217 * ITLQ nexuses. The bus address read from SCRIPTS is 1218 * inside the header. 1219 */ 1220 u32 *itlq_tbl; /* Kernel virtual address */ 1221 1222 /* 1223 * Busy CCBs management. 1224 */ 1225 u_short busy_itlq; /* Number of busy tagged CCBs */ 1226 u_short busy_itl; /* Number of busy untagged CCBs */ 1227 1228 /* 1229 * Circular tag allocation buffer. 1230 */ 1231 u_short ia_tag; /* Tag allocation index */ 1232 u_short if_tag; /* Tag release index */ 1233 u_char *cb_tags; /* Circular tags buffer */ 1234 1235 /* 1236 * Set when we want to clear all tasks. 1237 */ 1238 u_char to_clear; 1239 1240 /* 1241 * Capabilities. 1242 */ 1243 u_char user_flags; 1244 u_char current_flags; 1245 }; 1246 1247 /* 1248 * Action from SCRIPTS on a task. 1249 * Is part of the CCB, but is also used separately to plug 1250 * error handling action to perform from SCRIPTS. 1251 */ 1252 struct sym_actscr { 1253 u32 start; /* Jumped by SCRIPTS after selection */ 1254 u32 restart; /* Jumped by SCRIPTS on relection */ 1255 }; 1256 1257 /* 1258 * Phase mismatch context. 1259 * 1260 * It is part of the CCB and is used as parameters for the 1261 * DATA pointer. We need two contexts to handle correctly the 1262 * SAVED DATA POINTER. 1263 */ 1264 struct sym_pmc { 1265 struct sym_tblmove sg; /* Updated interrupted SG block */ 1266 u32 ret; /* SCRIPT return address */ 1267 }; 1268 1269 /* 1270 * LUN control block lookup. 1271 * We use a direct pointer for LUN #0, and a table of 1272 * pointers which is only allocated for devices that support 1273 * LUN(s) > 0. 1274 */ 1275 #if SYM_CONF_MAX_LUN <= 1 1276 #define sym_lp(np, tp, lun) (!lun) ? (tp)->lun0p : 0 1277 #else 1278 #define sym_lp(np, tp, lun) \ 1279 (!lun) ? (tp)->lun0p : (tp)->lunmp ? (tp)->lunmp[(lun)] : 0 1280 #endif 1281 1282 /* 1283 * Status are used by the host and the script processor. 1284 * 1285 * The last four bytes (status[4]) are copied to the 1286 * scratchb register (declared as scr0..scr3) just after the 1287 * select/reselect, and copied back just after disconnecting. 1288 * Inside the script the XX_REG are used. 1289 */ 1290 1291 /* 1292 * Last four bytes (script) 1293 */ 1294 #define QU_REG scr0 1295 #define HS_REG scr1 1296 #define HS_PRT nc_scr1 1297 #define SS_REG scr2 1298 #define SS_PRT nc_scr2 1299 #define HF_REG scr3 1300 #define HF_PRT nc_scr3 1301 1302 /* 1303 * Last four bytes (host) 1304 */ 1305 #define actualquirks phys.head.status[0] 1306 #define host_status phys.head.status[1] 1307 #define ssss_status phys.head.status[2] 1308 #define host_flags phys.head.status[3] 1309 1310 /* 1311 * Host flags 1312 */ 1313 #define HF_IN_PM0 1u 1314 #define HF_IN_PM1 (1u<<1) 1315 #define HF_ACT_PM (1u<<2) 1316 #define HF_DP_SAVED (1u<<3) 1317 #define HF_SENSE (1u<<4) 1318 #define HF_EXT_ERR (1u<<5) 1319 #define HF_DATA_IN (1u<<6) 1320 #ifdef SYM_CONF_IARB_SUPPORT 1321 #define HF_HINT_IARB (1u<<7) 1322 #endif 1323 1324 /* 1325 * Global CCB HEADER. 1326 * 1327 * Due to lack of indirect addressing on earlier NCR chips, 1328 * this substructure is copied from the ccb to a global 1329 * address after selection (or reselection) and copied back 1330 * before disconnect. 1331 * For SYMBIOS chips that support LOAD/STORE this copy is 1332 * not needed and thus not performed. 1333 */ 1334 1335 struct sym_ccbh { 1336 /* 1337 * Start and restart SCRIPTS addresses (must be at 0). 1338 */ 1339 /*0*/ struct sym_actscr go; 1340 1341 /* 1342 * SCRIPTS jump address that deal with data pointers. 1343 * 'savep' points to the position in the script responsible 1344 * for the actual transfer of data. 1345 * It's written on reception of a SAVE_DATA_POINTER message. 1346 */ 1347 u32 savep; /* Jump address to saved data pointer */ 1348 u32 lastp; /* SCRIPTS address at end of data */ 1349 u32 goalp; /* Not accessed for now from SCRIPTS */ 1350 1351 /* 1352 * Status fields. 1353 */ 1354 u8 status[4]; 1355 }; 1356 1357 /* 1358 * Data Structure Block 1359 * 1360 * During execution of a ccb by the script processor, the 1361 * DSA (data structure address) register points to this 1362 * substructure of the ccb. 1363 */ 1364 struct sym_dsb { 1365 /* 1366 * CCB header. 1367 * Also assumed at offset 0 of the sym_ccb structure. 1368 */ 1369 /*0*/ struct sym_ccbh head; 1370 1371 /* 1372 * Phase mismatch contexts. 1373 * We need two to handle correctly the SAVED DATA POINTER. 1374 * MUST BOTH BE AT OFFSET < 256, due to using 8 bit arithmetic 1375 * for address calculation from SCRIPTS. 1376 */ 1377 struct sym_pmc pm0; 1378 struct sym_pmc pm1; 1379 1380 /* 1381 * Table data for Script 1382 */ 1383 struct sym_tblsel select; 1384 struct sym_tblmove smsg; 1385 struct sym_tblmove smsg_ext; 1386 struct sym_tblmove cmd; 1387 struct sym_tblmove sense; 1388 struct sym_tblmove wresid; 1389 struct sym_tblmove data [SYM_CONF_MAX_SG]; 1390 }; 1391 1392 /* 1393 * Our Command Control Block 1394 */ 1395 struct sym_ccb { 1396 /* 1397 * This is the data structure which is pointed by the DSA 1398 * register when it is executed by the script processor. 1399 * It must be the first entry. 1400 */ 1401 struct sym_dsb phys; 1402 1403 /* 1404 * Pointer to CAM ccb and related stuff. 1405 */ 1406 struct callout ch; /* callout handle */ 1407 union ccb *cam_ccb; /* CAM scsiio ccb */ 1408 u8 cdb_buf[16]; /* Copy of CDB */ 1409 u8 *sns_bbuf; /* Bounce buffer for sense data */ 1410 #define SYM_SNS_BBUF_LEN sizeof(struct scsi_sense_data) 1411 int data_len; /* Total data length */ 1412 int segments; /* Number of SG segments */ 1413 1414 /* 1415 * Miscellaneous status'. 1416 */ 1417 u_char nego_status; /* Negotiation status */ 1418 u_char xerr_status; /* Extended error flags */ 1419 u32 extra_bytes; /* Extraneous bytes transferred */ 1420 1421 /* 1422 * Message areas. 1423 * We prepare a message to be sent after selection. 1424 * We may use a second one if the command is rescheduled 1425 * due to CHECK_CONDITION or COMMAND TERMINATED. 1426 * Contents are IDENTIFY and SIMPLE_TAG. 1427 * While negotiating sync or wide transfer, 1428 * a SDTR or WDTR message is appended. 1429 */ 1430 u_char scsi_smsg [12]; 1431 u_char scsi_smsg2[12]; 1432 1433 /* 1434 * Auto request sense related fields. 1435 */ 1436 u_char sensecmd[6]; /* Request Sense command */ 1437 u_char sv_scsi_status; /* Saved SCSI status */ 1438 u_char sv_xerr_status; /* Saved extended status */ 1439 int sv_resid; /* Saved residual */ 1440 1441 /* 1442 * Map for the DMA of user data. 1443 */ 1444 void *arg; /* Argument for some callback */ 1445 bus_dmamap_t dmamap; /* DMA map for user data */ 1446 u_char dmamapped; 1447 #define SYM_DMA_NONE 0 1448 #define SYM_DMA_READ 1 1449 #define SYM_DMA_WRITE 2 1450 /* 1451 * Other fields. 1452 */ 1453 u32 ccb_ba; /* BUS address of this CCB */ 1454 u_short tag; /* Tag for this transfer */ 1455 /* NO_TAG means no tag */ 1456 u_char target; 1457 u_char lun; 1458 ccb_p link_ccbh; /* Host adapter CCB hash chain */ 1459 SYM_QUEHEAD 1460 link_ccbq; /* Link to free/busy CCB queue */ 1461 u32 startp; /* Initial data pointer */ 1462 int ext_sg; /* Extreme data pointer, used */ 1463 int ext_ofs; /* to calculate the residual. */ 1464 u_char to_abort; /* Want this IO to be aborted */ 1465 }; 1466 1467 #define CCB_BA(cp,lbl) (cp->ccb_ba + offsetof(struct sym_ccb, lbl)) 1468 1469 /* 1470 * Host Control Block 1471 */ 1472 struct sym_hcb { 1473 struct lock lock; 1474 1475 /* 1476 * Global headers. 1477 * Due to poorness of addressing capabilities, earlier 1478 * chips (810, 815, 825) copy part of the data structures 1479 * (CCB, TCB and LCB) in fixed areas. 1480 */ 1481 #ifdef SYM_CONF_GENERIC_SUPPORT 1482 struct sym_ccbh ccb_head; 1483 struct sym_tcbh tcb_head; 1484 struct sym_lcbh lcb_head; 1485 #endif 1486 /* 1487 * Idle task and invalid task actions and 1488 * their bus addresses. 1489 */ 1490 struct sym_actscr idletask, notask, bad_itl, bad_itlq; 1491 vm_offset_t idletask_ba, notask_ba, bad_itl_ba, bad_itlq_ba; 1492 1493 /* 1494 * Dummy lun table to protect us against target 1495 * returning bad lun number on reselection. 1496 */ 1497 u32 *badluntbl; /* Table physical address */ 1498 u32 badlun_sa; /* SCRIPT handler BUS address */ 1499 1500 /* 1501 * Bus address of this host control block. 1502 */ 1503 u32 hcb_ba; 1504 1505 /* 1506 * Bit 32-63 of the on-chip RAM bus address in LE format. 1507 * The START_RAM64 script loads the MMRS and MMWS from this 1508 * field. 1509 */ 1510 u32 scr_ram_seg; 1511 1512 /* 1513 * Chip and controller indentification. 1514 */ 1515 device_t device; 1516 1517 /* 1518 * Initial value of some IO register bits. 1519 * These values are assumed to have been set by BIOS, and may 1520 * be used to probe adapter implementation differences. 1521 */ 1522 u_char sv_scntl0, sv_scntl3, sv_dmode, sv_dcntl, sv_ctest3, sv_ctest4, 1523 sv_ctest5, sv_gpcntl, sv_stest2, sv_stest4, sv_scntl4, 1524 sv_stest1; 1525 1526 /* 1527 * Actual initial value of IO register bits used by the 1528 * driver. They are loaded at initialisation according to 1529 * features that are to be enabled/disabled. 1530 */ 1531 u_char rv_scntl0, rv_scntl3, rv_dmode, rv_dcntl, rv_ctest3, rv_ctest4, 1532 rv_ctest5, rv_stest2, rv_ccntl0, rv_ccntl1, rv_scntl4; 1533 1534 /* 1535 * Target data. 1536 */ 1537 #ifdef __x86_64__ 1538 struct sym_tcb *target; 1539 #else 1540 struct sym_tcb target[SYM_CONF_MAX_TARGET]; 1541 #endif 1542 1543 /* 1544 * Target control block bus address array used by the SCRIPT 1545 * on reselection. 1546 */ 1547 u32 *targtbl; 1548 u32 targtbl_ba; 1549 1550 /* 1551 * CAM SIM information for this instance. 1552 */ 1553 struct cam_sim *sim; 1554 struct cam_path *path; 1555 1556 /* 1557 * Allocated hardware resources. 1558 */ 1559 struct resource *irq_res; 1560 struct resource *io_res; 1561 struct resource *mmio_res; 1562 struct resource *ram_res; 1563 int ram_id; 1564 void *intr; 1565 1566 /* 1567 * Bus stuff. 1568 * 1569 * My understanding of PCI is that all agents must share the 1570 * same addressing range and model. 1571 * But some hardware architecture guys provide complex and 1572 * brain-deaded stuff that makes shit. 1573 * This driver only support PCI compliant implementations and 1574 * deals with part of the BUS stuff complexity only to fit O/S 1575 * requirements. 1576 */ 1577 1578 /* 1579 * DMA stuff. 1580 */ 1581 bus_dma_tag_t bus_dmat; /* DMA tag from parent BUS */ 1582 bus_dma_tag_t data_dmat; /* DMA tag for user data */ 1583 /* 1584 * BUS addresses of the chip 1585 */ 1586 vm_offset_t mmio_ba; /* MMIO BUS address */ 1587 int mmio_ws; /* MMIO Window size */ 1588 1589 vm_offset_t ram_ba; /* RAM BUS address */ 1590 int ram_ws; /* RAM window size */ 1591 1592 /* 1593 * SCRIPTS virtual and physical bus addresses. 1594 * 'script' is loaded in the on-chip RAM if present. 1595 * 'scripth' stays in main memory for all chips except the 1596 * 53C895A, 53C896 and 53C1010 that provide 8K on-chip RAM. 1597 */ 1598 u_char *scripta0; /* Copies of script and scripth */ 1599 u_char *scriptb0; /* Copies of script and scripth */ 1600 vm_offset_t scripta_ba; /* Actual script and scripth */ 1601 vm_offset_t scriptb_ba; /* bus addresses. */ 1602 vm_offset_t scriptb0_ba; 1603 u_short scripta_sz; /* Actual size of script A */ 1604 u_short scriptb_sz; /* Actual size of script B */ 1605 1606 /* 1607 * Bus addresses, setup and patch methods for 1608 * the selected firmware. 1609 */ 1610 struct sym_fwa_ba fwa_bas; /* Useful SCRIPTA bus addresses */ 1611 struct sym_fwb_ba fwb_bas; /* Useful SCRIPTB bus addresses */ 1612 void (*fw_setup)(hcb_p np, const struct sym_fw *fw); 1613 void (*fw_patch)(hcb_p np); 1614 const char *fw_name; 1615 1616 /* 1617 * General controller parameters and configuration. 1618 */ 1619 u_short device_id; /* PCI device id */ 1620 u_char revision_id; /* PCI device revision id */ 1621 u_int features; /* Chip features map */ 1622 u_char myaddr; /* SCSI id of the adapter */ 1623 u_char maxburst; /* log base 2 of dwords burst */ 1624 u_char maxwide; /* Maximum transfer width */ 1625 u_char minsync; /* Min sync period factor (ST) */ 1626 u_char maxsync; /* Max sync period factor (ST) */ 1627 u_char maxoffs; /* Max scsi offset (ST) */ 1628 u_char minsync_dt; /* Min sync period factor (DT) */ 1629 u_char maxsync_dt; /* Max sync period factor (DT) */ 1630 u_char maxoffs_dt; /* Max scsi offset (DT) */ 1631 u_char multiplier; /* Clock multiplier (1,2,4) */ 1632 u_char clock_divn; /* Number of clock divisors */ 1633 u32 clock_khz; /* SCSI clock frequency in KHz */ 1634 u32 pciclk_khz; /* Estimated PCI clock in KHz */ 1635 /* 1636 * Start queue management. 1637 * It is filled up by the host processor and accessed by the 1638 * SCRIPTS processor in order to start SCSI commands. 1639 */ 1640 volatile /* Prevent code optimizations */ 1641 u32 *squeue; /* Start queue virtual address */ 1642 u32 squeue_ba; /* Start queue BUS address */ 1643 u_short squeueput; /* Next free slot of the queue */ 1644 u_short actccbs; /* Number of allocated CCBs */ 1645 1646 /* 1647 * Command completion queue. 1648 * It is the same size as the start queue to avoid overflow. 1649 */ 1650 u_short dqueueget; /* Next position to scan */ 1651 volatile /* Prevent code optimizations */ 1652 u32 *dqueue; /* Completion (done) queue */ 1653 u32 dqueue_ba; /* Done queue BUS address */ 1654 1655 /* 1656 * Miscellaneous buffers accessed by the scripts-processor. 1657 * They shall be DWORD aligned, because they may be read or 1658 * written with a script command. 1659 */ 1660 u_char msgout[8]; /* Buffer for MESSAGE OUT */ 1661 u_char msgin [8]; /* Buffer for MESSAGE IN */ 1662 u32 lastmsg; /* Last SCSI message sent */ 1663 u_char scratch; /* Scratch for SCSI receive */ 1664 1665 /* 1666 * Miscellaneous configuration and status parameters. 1667 */ 1668 u_char usrflags; /* Miscellaneous user flags */ 1669 u_char scsi_mode; /* Current SCSI BUS mode */ 1670 u_char verbose; /* Verbosity for this controller*/ 1671 u32 cache; /* Used for cache test at init. */ 1672 1673 /* 1674 * CCB lists and queue. 1675 */ 1676 ccb_p ccbh[CCB_HASH_SIZE]; /* CCB hashed by DSA value */ 1677 SYM_QUEHEAD free_ccbq; /* Queue of available CCBs */ 1678 SYM_QUEHEAD busy_ccbq; /* Queue of busy CCBs */ 1679 1680 /* 1681 * During error handling and/or recovery, 1682 * active CCBs that are to be completed with 1683 * error or requeued are moved from the busy_ccbq 1684 * to the comp_ccbq prior to completion. 1685 */ 1686 SYM_QUEHEAD comp_ccbq; 1687 1688 /* 1689 * CAM CCB pending queue. 1690 */ 1691 SYM_QUEHEAD cam_ccbq; 1692 1693 /* 1694 * IMMEDIATE ARBITRATION (IARB) control. 1695 * 1696 * We keep track in 'last_cp' of the last CCB that has been 1697 * queued to the SCRIPTS processor and clear 'last_cp' when 1698 * this CCB completes. If last_cp is not zero at the moment 1699 * we queue a new CCB, we set a flag in 'last_cp' that is 1700 * used by the SCRIPTS as a hint for setting IARB. 1701 * We donnot set more than 'iarb_max' consecutive hints for 1702 * IARB in order to leave devices a chance to reselect. 1703 * By the way, any non zero value of 'iarb_max' is unfair. :) 1704 */ 1705 #ifdef SYM_CONF_IARB_SUPPORT 1706 u_short iarb_max; /* Max. # consecutive IARB hints*/ 1707 u_short iarb_count; /* Actual # of these hints */ 1708 ccb_p last_cp; 1709 #endif 1710 1711 /* 1712 * Command abort handling. 1713 * We need to synchronize tightly with the SCRIPTS 1714 * processor in order to handle things correctly. 1715 */ 1716 u_char abrt_msg[4]; /* Message to send buffer */ 1717 struct sym_tblmove abrt_tbl; /* Table for the MOV of it */ 1718 struct sym_tblsel abrt_sel; /* Sync params for selection */ 1719 u_char istat_sem; /* Tells the chip to stop (SEM) */ 1720 }; 1721 1722 #define HCB_BA(np, lbl) (np->hcb_ba + offsetof(struct sym_hcb, lbl)) 1723 1724 /* 1725 * Return the name of the controller. 1726 */ 1727 static __inline const char *sym_name(hcb_p np) 1728 { 1729 return device_get_nameunit(np->device); 1730 } 1731 1732 /*--------------------------------------------------------------------------*/ 1733 /*------------------------------ FIRMWARES ---------------------------------*/ 1734 /*--------------------------------------------------------------------------*/ 1735 1736 /* 1737 * This stuff will be moved to a separate source file when 1738 * the driver will be broken into several source modules. 1739 */ 1740 1741 /* 1742 * Macros used for all firmwares. 1743 */ 1744 #define SYM_GEN_A(s, label) ((short) offsetof(s, label)), 1745 #define SYM_GEN_B(s, label) ((short) offsetof(s, label)), 1746 #define PADDR_A(label) SYM_GEN_PADDR_A(struct SYM_FWA_SCR, label) 1747 #define PADDR_B(label) SYM_GEN_PADDR_B(struct SYM_FWB_SCR, label) 1748 1749 1750 #ifdef SYM_CONF_GENERIC_SUPPORT 1751 /* 1752 * Allocate firmware #1 script area. 1753 */ 1754 #define SYM_FWA_SCR sym_fw1a_scr 1755 #define SYM_FWB_SCR sym_fw1b_scr 1756 #include <dev/disk/sym/sym_fw1.h> 1757 static const struct sym_fwa_ofs sym_fw1a_ofs = { 1758 SYM_GEN_FW_A(struct SYM_FWA_SCR) 1759 }; 1760 static const struct sym_fwb_ofs sym_fw1b_ofs = { 1761 SYM_GEN_FW_B(struct SYM_FWB_SCR) 1762 }; 1763 #undef SYM_FWA_SCR 1764 #undef SYM_FWB_SCR 1765 #endif /* SYM_CONF_GENERIC_SUPPORT */ 1766 1767 /* 1768 * Allocate firmware #2 script area. 1769 */ 1770 #define SYM_FWA_SCR sym_fw2a_scr 1771 #define SYM_FWB_SCR sym_fw2b_scr 1772 #include <dev/disk/sym/sym_fw2.h> 1773 static const struct sym_fwa_ofs sym_fw2a_ofs = { 1774 SYM_GEN_FW_A(struct SYM_FWA_SCR) 1775 }; 1776 static const struct sym_fwb_ofs sym_fw2b_ofs = { 1777 SYM_GEN_FW_B(struct SYM_FWB_SCR) 1778 SYM_GEN_B(struct SYM_FWB_SCR, start64) 1779 SYM_GEN_B(struct SYM_FWB_SCR, pm_handle) 1780 }; 1781 #undef SYM_FWA_SCR 1782 #undef SYM_FWB_SCR 1783 1784 #undef SYM_GEN_A 1785 #undef SYM_GEN_B 1786 #undef PADDR_A 1787 #undef PADDR_B 1788 1789 #ifdef SYM_CONF_GENERIC_SUPPORT 1790 /* 1791 * Patch routine for firmware #1. 1792 */ 1793 static void 1794 sym_fw1_patch(hcb_p np) 1795 { 1796 struct sym_fw1a_scr *scripta0; 1797 struct sym_fw1b_scr *scriptb0; 1798 1799 scripta0 = (struct sym_fw1a_scr *) np->scripta0; 1800 scriptb0 = (struct sym_fw1b_scr *) np->scriptb0; 1801 1802 /* 1803 * Remove LED support if not needed. 1804 */ 1805 if (!(np->features & FE_LED0)) { 1806 scripta0->idle[0] = cpu_to_scr(SCR_NO_OP); 1807 scripta0->reselected[0] = cpu_to_scr(SCR_NO_OP); 1808 scripta0->start[0] = cpu_to_scr(SCR_NO_OP); 1809 } 1810 1811 #ifdef SYM_CONF_IARB_SUPPORT 1812 /* 1813 * If user does not want to use IMMEDIATE ARBITRATION 1814 * when we are reselected while attempting to arbitrate, 1815 * patch the SCRIPTS accordingly with a SCRIPT NO_OP. 1816 */ 1817 if (!SYM_CONF_SET_IARB_ON_ARB_LOST) 1818 scripta0->ungetjob[0] = cpu_to_scr(SCR_NO_OP); 1819 #endif 1820 /* 1821 * Patch some data in SCRIPTS. 1822 * - start and done queue initial bus address. 1823 * - target bus address table bus address. 1824 */ 1825 scriptb0->startpos[0] = cpu_to_scr(np->squeue_ba); 1826 scriptb0->done_pos[0] = cpu_to_scr(np->dqueue_ba); 1827 scriptb0->targtbl[0] = cpu_to_scr(np->targtbl_ba); 1828 } 1829 #endif /* SYM_CONF_GENERIC_SUPPORT */ 1830 1831 /* 1832 * Patch routine for firmware #2. 1833 */ 1834 static void 1835 sym_fw2_patch(hcb_p np) 1836 { 1837 struct sym_fw2a_scr *scripta0; 1838 struct sym_fw2b_scr *scriptb0; 1839 1840 scripta0 = (struct sym_fw2a_scr *) np->scripta0; 1841 scriptb0 = (struct sym_fw2b_scr *) np->scriptb0; 1842 1843 /* 1844 * Remove LED support if not needed. 1845 */ 1846 if (!(np->features & FE_LED0)) { 1847 scripta0->idle[0] = cpu_to_scr(SCR_NO_OP); 1848 scripta0->reselected[0] = cpu_to_scr(SCR_NO_OP); 1849 scripta0->start[0] = cpu_to_scr(SCR_NO_OP); 1850 } 1851 1852 #ifdef SYM_CONF_IARB_SUPPORT 1853 /* 1854 * If user does not want to use IMMEDIATE ARBITRATION 1855 * when we are reselected while attempting to arbitrate, 1856 * patch the SCRIPTS accordingly with a SCRIPT NO_OP. 1857 */ 1858 if (!SYM_CONF_SET_IARB_ON_ARB_LOST) 1859 scripta0->ungetjob[0] = cpu_to_scr(SCR_NO_OP); 1860 #endif 1861 /* 1862 * Patch some variable in SCRIPTS. 1863 * - start and done queue initial bus address. 1864 * - target bus address table bus address. 1865 */ 1866 scriptb0->startpos[0] = cpu_to_scr(np->squeue_ba); 1867 scriptb0->done_pos[0] = cpu_to_scr(np->dqueue_ba); 1868 scriptb0->targtbl[0] = cpu_to_scr(np->targtbl_ba); 1869 1870 /* 1871 * Remove the load of SCNTL4 on reselection if not a C10. 1872 */ 1873 if (!(np->features & FE_C10)) { 1874 scripta0->resel_scntl4[0] = cpu_to_scr(SCR_NO_OP); 1875 scripta0->resel_scntl4[1] = cpu_to_scr(0); 1876 } 1877 1878 /* 1879 * Remove a couple of work-arounds specific to C1010 if 1880 * they are not desirable. See `sym_fw2.h' for more details. 1881 */ 1882 if (!(np->device_id == PCI_ID_LSI53C1010_2 && 1883 np->revision_id < 0x1 && 1884 np->pciclk_khz < 60000)) { 1885 scripta0->datao_phase[0] = cpu_to_scr(SCR_NO_OP); 1886 scripta0->datao_phase[1] = cpu_to_scr(0); 1887 } 1888 if (!(np->device_id == PCI_ID_LSI53C1010 && 1889 /* np->revision_id < 0xff */ 1)) { 1890 scripta0->sel_done[0] = cpu_to_scr(SCR_NO_OP); 1891 scripta0->sel_done[1] = cpu_to_scr(0); 1892 } 1893 1894 /* 1895 * Patch some other variables in SCRIPTS. 1896 * These ones are loaded by the SCRIPTS processor. 1897 */ 1898 scriptb0->pm0_data_addr[0] = 1899 cpu_to_scr(np->scripta_ba + 1900 offsetof(struct sym_fw2a_scr, pm0_data)); 1901 scriptb0->pm1_data_addr[0] = 1902 cpu_to_scr(np->scripta_ba + 1903 offsetof(struct sym_fw2a_scr, pm1_data)); 1904 } 1905 1906 /* 1907 * Fill the data area in scripts. 1908 * To be done for all firmwares. 1909 */ 1910 static void 1911 sym_fw_fill_data (u32 *in, u32 *out) 1912 { 1913 int i; 1914 1915 for (i = 0; i < SYM_CONF_MAX_SG; i++) { 1916 *in++ = SCR_CHMOV_TBL ^ SCR_DATA_IN; 1917 *in++ = offsetof (struct sym_dsb, data[i]); 1918 *out++ = SCR_CHMOV_TBL ^ SCR_DATA_OUT; 1919 *out++ = offsetof (struct sym_dsb, data[i]); 1920 } 1921 } 1922 1923 /* 1924 * Setup useful script bus addresses. 1925 * To be done for all firmwares. 1926 */ 1927 static void 1928 sym_fw_setup_bus_addresses(hcb_p np, const struct sym_fw *fw) 1929 { 1930 u32 *pa; 1931 const u_short *po; 1932 int i; 1933 1934 /* 1935 * Build the bus address table for script A 1936 * from the script A offset table. 1937 */ 1938 po = (const u_short *) fw->a_ofs; 1939 pa = (u32 *) &np->fwa_bas; 1940 for (i = 0 ; i < sizeof(np->fwa_bas)/sizeof(u32) ; i++) 1941 pa[i] = np->scripta_ba + po[i]; 1942 1943 /* 1944 * Same for script B. 1945 */ 1946 po = (const u_short *) fw->b_ofs; 1947 pa = (u32 *) &np->fwb_bas; 1948 for (i = 0 ; i < sizeof(np->fwb_bas)/sizeof(u32) ; i++) 1949 pa[i] = np->scriptb_ba + po[i]; 1950 } 1951 1952 #ifdef SYM_CONF_GENERIC_SUPPORT 1953 /* 1954 * Setup routine for firmware #1. 1955 */ 1956 static void 1957 sym_fw1_setup(hcb_p np, const struct sym_fw *fw) 1958 { 1959 struct sym_fw1a_scr *scripta0; 1960 1961 scripta0 = (struct sym_fw1a_scr *) np->scripta0; 1962 1963 /* 1964 * Fill variable parts in scripts. 1965 */ 1966 sym_fw_fill_data(scripta0->data_in, scripta0->data_out); 1967 1968 /* 1969 * Setup bus addresses used from the C code.. 1970 */ 1971 sym_fw_setup_bus_addresses(np, fw); 1972 } 1973 #endif /* SYM_CONF_GENERIC_SUPPORT */ 1974 1975 /* 1976 * Setup routine for firmware #2. 1977 */ 1978 static void 1979 sym_fw2_setup(hcb_p np, const struct sym_fw *fw) 1980 { 1981 struct sym_fw2a_scr *scripta0; 1982 1983 scripta0 = (struct sym_fw2a_scr *) np->scripta0; 1984 1985 /* 1986 * Fill variable parts in scripts. 1987 */ 1988 sym_fw_fill_data(scripta0->data_in, scripta0->data_out); 1989 1990 /* 1991 * Setup bus addresses used from the C code.. 1992 */ 1993 sym_fw_setup_bus_addresses(np, fw); 1994 } 1995 1996 /* 1997 * Allocate firmware descriptors. 1998 */ 1999 #ifdef SYM_CONF_GENERIC_SUPPORT 2000 static const struct sym_fw sym_fw1 = SYM_FW_ENTRY(sym_fw1, "NCR-generic"); 2001 #endif /* SYM_CONF_GENERIC_SUPPORT */ 2002 static const struct sym_fw sym_fw2 = SYM_FW_ENTRY(sym_fw2, "LOAD/STORE-based"); 2003 2004 /* 2005 * Find the most appropriate firmware for a chip. 2006 */ 2007 static const struct sym_fw * 2008 sym_find_firmware(const struct sym_pci_chip *chip) 2009 { 2010 if (chip->features & FE_LDSTR) 2011 return &sym_fw2; 2012 #ifdef SYM_CONF_GENERIC_SUPPORT 2013 else if (!(chip->features & (FE_PFEN|FE_NOPM|FE_DAC))) 2014 return &sym_fw1; 2015 #endif 2016 else 2017 return NULL; 2018 } 2019 2020 /* 2021 * Bind a script to physical addresses. 2022 */ 2023 static void sym_fw_bind_script (hcb_p np, u32 *start, int len) 2024 { 2025 u32 opcode, new, old, tmp1, tmp2; 2026 u32 *end, *cur; 2027 int relocs; 2028 2029 cur = start; 2030 end = start + len/4; 2031 2032 while (cur < end) { 2033 2034 opcode = *cur; 2035 2036 /* 2037 * If we forget to change the length 2038 * in scripts, a field will be 2039 * padded with 0. This is an illegal 2040 * command. 2041 */ 2042 if (opcode == 0) { 2043 kprintf ("%s: ERROR0 IN SCRIPT at %d.\n", 2044 sym_name(np), (int) (cur-start)); 2045 MDELAY (10000); 2046 ++cur; 2047 continue; 2048 } 2049 2050 /* 2051 * We use the bogus value 0xf00ff00f ;-) 2052 * to reserve data area in SCRIPTS. 2053 */ 2054 if (opcode == SCR_DATA_ZERO) { 2055 *cur++ = 0; 2056 continue; 2057 } 2058 2059 if (DEBUG_FLAGS & DEBUG_SCRIPT) 2060 kprintf ("%d: <%x>\n", (int) (cur-start), 2061 (unsigned)opcode); 2062 2063 /* 2064 * We don't have to decode ALL commands 2065 */ 2066 switch (opcode >> 28) { 2067 case 0xf: 2068 /* 2069 * LOAD / STORE DSA relative, don't relocate. 2070 */ 2071 relocs = 0; 2072 break; 2073 case 0xe: 2074 /* 2075 * LOAD / STORE absolute. 2076 */ 2077 relocs = 1; 2078 break; 2079 case 0xc: 2080 /* 2081 * COPY has TWO arguments. 2082 */ 2083 relocs = 2; 2084 tmp1 = cur[1]; 2085 tmp2 = cur[2]; 2086 if ((tmp1 ^ tmp2) & 3) { 2087 kprintf ("%s: ERROR1 IN SCRIPT at %d.\n", 2088 sym_name(np), (int) (cur-start)); 2089 MDELAY (10000); 2090 } 2091 /* 2092 * If PREFETCH feature not enabled, remove 2093 * the NO FLUSH bit if present. 2094 */ 2095 if ((opcode & SCR_NO_FLUSH) && 2096 !(np->features & FE_PFEN)) { 2097 opcode = (opcode & ~SCR_NO_FLUSH); 2098 } 2099 break; 2100 case 0x0: 2101 /* 2102 * MOVE/CHMOV (absolute address) 2103 */ 2104 if (!(np->features & FE_WIDE)) 2105 opcode = (opcode | OPC_MOVE); 2106 relocs = 1; 2107 break; 2108 case 0x1: 2109 /* 2110 * MOVE/CHMOV (table indirect) 2111 */ 2112 if (!(np->features & FE_WIDE)) 2113 opcode = (opcode | OPC_MOVE); 2114 relocs = 0; 2115 break; 2116 case 0x8: 2117 /* 2118 * JUMP / CALL 2119 * dont't relocate if relative :-) 2120 */ 2121 if (opcode & 0x00800000) 2122 relocs = 0; 2123 else if ((opcode & 0xf8400000) == 0x80400000)/*JUMP64*/ 2124 relocs = 2; 2125 else 2126 relocs = 1; 2127 break; 2128 case 0x4: 2129 case 0x5: 2130 case 0x6: 2131 case 0x7: 2132 relocs = 1; 2133 break; 2134 default: 2135 relocs = 0; 2136 break; 2137 } 2138 2139 /* 2140 * Scriptify:) the opcode. 2141 */ 2142 *cur++ = cpu_to_scr(opcode); 2143 2144 /* 2145 * If no relocation, assume 1 argument 2146 * and just scriptize:) it. 2147 */ 2148 if (!relocs) { 2149 *cur = cpu_to_scr(*cur); 2150 ++cur; 2151 continue; 2152 } 2153 2154 /* 2155 * Otherwise performs all needed relocations. 2156 */ 2157 while (relocs--) { 2158 old = *cur; 2159 2160 switch (old & RELOC_MASK) { 2161 case RELOC_REGISTER: 2162 new = (old & ~RELOC_MASK) + np->mmio_ba; 2163 break; 2164 case RELOC_LABEL_A: 2165 new = (old & ~RELOC_MASK) + np->scripta_ba; 2166 break; 2167 case RELOC_LABEL_B: 2168 new = (old & ~RELOC_MASK) + np->scriptb_ba; 2169 break; 2170 case RELOC_SOFTC: 2171 new = (old & ~RELOC_MASK) + np->hcb_ba; 2172 break; 2173 case 0: 2174 /* 2175 * Don't relocate a 0 address. 2176 * They are mostly used for patched or 2177 * script self-modified areas. 2178 */ 2179 if (old == 0) { 2180 new = old; 2181 break; 2182 } 2183 /* fall through */ 2184 default: 2185 new = 0; 2186 panic("sym_fw_bind_script: " 2187 "weird relocation %x\n", old); 2188 break; 2189 } 2190 2191 *cur++ = cpu_to_scr(new); 2192 } 2193 } 2194 } 2195 2196 /*---------------------------------------------------------------------------*/ 2197 /*--------------------------- END OF FIRMWARES -----------------------------*/ 2198 /*---------------------------------------------------------------------------*/ 2199 2200 /* 2201 * Function prototypes. 2202 */ 2203 static void sym_save_initial_setting (hcb_p np); 2204 static int sym_prepare_setting (hcb_p np, struct sym_nvram *nvram); 2205 static int sym_prepare_nego (hcb_p np, ccb_p cp, int nego, u_char *msgptr); 2206 static void sym_put_start_queue (hcb_p np, ccb_p cp); 2207 static void sym_chip_reset (hcb_p np); 2208 static void sym_soft_reset (hcb_p np); 2209 static void sym_start_reset (hcb_p np); 2210 static int sym_reset_scsi_bus (hcb_p np, int enab_int); 2211 static int sym_wakeup_done (hcb_p np); 2212 static void sym_flush_busy_queue (hcb_p np, int cam_status); 2213 static void sym_flush_comp_queue (hcb_p np, int cam_status); 2214 static void sym_init (hcb_p np, int reason); 2215 static int sym_getsync(hcb_p np, u_char dt, u_char sfac, u_char *divp, 2216 u_char *fakp); 2217 static void sym_setsync (hcb_p np, ccb_p cp, u_char ofs, u_char per, 2218 u_char div, u_char fak); 2219 static void sym_setwide (hcb_p np, ccb_p cp, u_char wide); 2220 static void sym_setpprot(hcb_p np, ccb_p cp, u_char dt, u_char ofs, 2221 u_char per, u_char wide, u_char div, u_char fak); 2222 static void sym_settrans(hcb_p np, ccb_p cp, u_char dt, u_char ofs, 2223 u_char per, u_char wide, u_char div, u_char fak); 2224 static void sym_log_hard_error (hcb_p np, u_short sist, u_char dstat); 2225 static void sym_intr (void *arg); 2226 static void sym_poll (struct cam_sim *sim); 2227 static void sym_recover_scsi_int (hcb_p np, u_char hsts); 2228 static void sym_int_sto (hcb_p np); 2229 static void sym_int_udc (hcb_p np); 2230 static void sym_int_sbmc (hcb_p np); 2231 static void sym_int_par (hcb_p np, u_short sist); 2232 static void sym_int_ma (hcb_p np); 2233 static int sym_dequeue_from_squeue(hcb_p np, int i, int target, int lun, 2234 int task); 2235 static void sym_sir_bad_scsi_status (hcb_p np, int num, ccb_p cp); 2236 static int sym_clear_tasks (hcb_p np, int status, int targ, int lun, int task); 2237 static void sym_sir_task_recovery (hcb_p np, int num); 2238 static int sym_evaluate_dp (hcb_p np, ccb_p cp, u32 scr, int *ofs); 2239 static void sym_modify_dp (hcb_p np, tcb_p tp, ccb_p cp, int ofs); 2240 static int sym_compute_residual (hcb_p np, ccb_p cp); 2241 static int sym_show_msg (u_char * msg); 2242 static void sym_print_msg (ccb_p cp, char *label, u_char *msg); 2243 static void sym_sync_nego (hcb_p np, tcb_p tp, ccb_p cp); 2244 static void sym_ppr_nego (hcb_p np, tcb_p tp, ccb_p cp); 2245 static void sym_wide_nego (hcb_p np, tcb_p tp, ccb_p cp); 2246 static void sym_nego_default (hcb_p np, tcb_p tp, ccb_p cp); 2247 static void sym_nego_rejected (hcb_p np, tcb_p tp, ccb_p cp); 2248 static void sym_int_sir (hcb_p np); 2249 static void sym_free_ccb (hcb_p np, ccb_p cp); 2250 static ccb_p sym_get_ccb (hcb_p np, u_char tn, u_char ln, u_char tag_order); 2251 static ccb_p sym_alloc_ccb (hcb_p np); 2252 static ccb_p sym_ccb_from_dsa (hcb_p np, u32 dsa); 2253 static lcb_p sym_alloc_lcb (hcb_p np, u_char tn, u_char ln); 2254 static void sym_alloc_lcb_tags (hcb_p np, u_char tn, u_char ln); 2255 static int sym_snooptest (hcb_p np); 2256 static void sym_selectclock(hcb_p np, u_char scntl3); 2257 static void sym_getclock (hcb_p np, int mult); 2258 static int sym_getpciclock (hcb_p np); 2259 static void sym_complete_ok (hcb_p np, ccb_p cp); 2260 static void sym_complete_error (hcb_p np, ccb_p cp); 2261 static void sym_callout (void *arg); 2262 static int sym_abort_scsiio (hcb_p np, union ccb *ccb, int timed_out); 2263 static void sym_reset_dev (hcb_p np, union ccb *ccb); 2264 static void sym_action (struct cam_sim *sim, union ccb *ccb); 2265 static int sym_setup_cdb (hcb_p np, struct ccb_scsiio *csio, ccb_p cp); 2266 static void sym_setup_data_and_start (hcb_p np, struct ccb_scsiio *csio, 2267 ccb_p cp); 2268 static int sym_fast_scatter_sg_physical(hcb_p np, ccb_p cp, 2269 bus_dma_segment_t *psegs, int nsegs); 2270 static int sym_scatter_sg_physical (hcb_p np, ccb_p cp, 2271 bus_dma_segment_t *psegs, int nsegs); 2272 static void sym_action2 (struct cam_sim *sim, union ccb *ccb); 2273 static void sym_update_trans (hcb_p np, tcb_p tp, struct sym_trans *tip, 2274 struct ccb_trans_settings *cts); 2275 static void sym_update_dflags(hcb_p np, u_char *flags, 2276 struct ccb_trans_settings *cts); 2277 2278 static const struct sym_pci_chip *sym_find_pci_chip (device_t dev); 2279 static int sym_pci_probe (device_t dev); 2280 static int sym_pci_attach (device_t dev); 2281 2282 static void sym_pci_free (hcb_p np); 2283 static int sym_cam_attach (hcb_p np); 2284 static void sym_cam_free (hcb_p np); 2285 2286 static void sym_nvram_setup_host (hcb_p np, struct sym_nvram *nvram); 2287 static void sym_nvram_setup_target (hcb_p np, int targ, struct sym_nvram *nvp); 2288 static int sym_read_nvram (hcb_p np, struct sym_nvram *nvp); 2289 2290 /* 2291 * Print something which allows to retrieve the controller type, 2292 * unit, target, lun concerned by a kernel message. 2293 */ 2294 static void PRINT_TARGET (hcb_p np, int target) 2295 { 2296 kprintf ("%s:%d:", sym_name(np), target); 2297 } 2298 2299 static void PRINT_LUN(hcb_p np, int target, int lun) 2300 { 2301 kprintf ("%s:%d:%d:", sym_name(np), target, lun); 2302 } 2303 2304 static void PRINT_ADDR (ccb_p cp) 2305 { 2306 if (cp && cp->cam_ccb) 2307 xpt_print_path(cp->cam_ccb->ccb_h.path); 2308 } 2309 2310 /* 2311 * Take into account this ccb in the freeze count. 2312 */ 2313 static void sym_freeze_cam_ccb(union ccb *ccb) 2314 { 2315 if (!(ccb->ccb_h.flags & CAM_DEV_QFRZDIS)) { 2316 if (!(ccb->ccb_h.status & CAM_DEV_QFRZN)) { 2317 ccb->ccb_h.status |= CAM_DEV_QFRZN; 2318 xpt_freeze_devq(ccb->ccb_h.path, 1); 2319 } 2320 } 2321 } 2322 2323 /* 2324 * Set the status field of a CAM CCB. 2325 */ 2326 static __inline void sym_set_cam_status(union ccb *ccb, cam_status status) 2327 { 2328 ccb->ccb_h.status &= ~CAM_STATUS_MASK; 2329 ccb->ccb_h.status |= status; 2330 } 2331 2332 /* 2333 * Get the status field of a CAM CCB. 2334 */ 2335 static __inline int sym_get_cam_status(union ccb *ccb) 2336 { 2337 return ccb->ccb_h.status & CAM_STATUS_MASK; 2338 } 2339 2340 /* 2341 * Enqueue a CAM CCB. 2342 */ 2343 static void sym_enqueue_cam_ccb(ccb_p cp) 2344 { 2345 hcb_p np; 2346 union ccb *ccb; 2347 2348 ccb = cp->cam_ccb; 2349 np = (hcb_p) cp->arg; 2350 2351 assert(!(ccb->ccb_h.status & CAM_SIM_QUEUED)); 2352 ccb->ccb_h.status = CAM_REQ_INPROG; 2353 2354 callout_reset(&cp->ch, ccb->ccb_h.timeout * hz / 1000, sym_callout, 2355 (caddr_t) ccb); 2356 ccb->ccb_h.status |= CAM_SIM_QUEUED; 2357 ccb->ccb_h.sym_hcb_ptr = np; 2358 2359 sym_insque_tail(sym_qptr(&ccb->ccb_h.sim_links), &np->cam_ccbq); 2360 } 2361 2362 /* 2363 * Complete a pending CAM CCB. 2364 */ 2365 static void _sym_xpt_done(hcb_p np, union ccb *ccb) 2366 { 2367 SYM_LOCK_ASSERT(LK_EXCLUSIVE); 2368 2369 KASSERT((ccb->ccb_h.status & CAM_SIM_QUEUED) == 0, 2370 ("%s: status=CAM_SIM_QUEUED", __func__)); 2371 2372 if (ccb->ccb_h.flags & CAM_DEV_QFREEZE) 2373 sym_freeze_cam_ccb(ccb); 2374 xpt_done(ccb); 2375 } 2376 2377 static void sym_xpt_done(hcb_p np, union ccb *ccb, ccb_p cp) 2378 { 2379 SYM_LOCK_ASSERT(LK_EXCLUSIVE); 2380 2381 if (ccb->ccb_h.status & CAM_SIM_QUEUED) { 2382 callout_stop(&cp->ch); 2383 sym_remque(sym_qptr(&ccb->ccb_h.sim_links)); 2384 ccb->ccb_h.status &= ~CAM_SIM_QUEUED; 2385 ccb->ccb_h.sym_hcb_ptr = NULL; 2386 } 2387 _sym_xpt_done(np, ccb); 2388 } 2389 2390 static void sym_xpt_done2(hcb_p np, union ccb *ccb, int cam_status) 2391 { 2392 SYM_LOCK_ASSERT(LK_EXCLUSIVE); 2393 2394 sym_set_cam_status(ccb, cam_status); 2395 _sym_xpt_done(np, ccb); 2396 } 2397 2398 /* 2399 * SYMBIOS chip clock divisor table. 2400 * 2401 * Divisors are multiplied by 10,000,000 in order to make 2402 * calculations more simple. 2403 */ 2404 #define _5M 5000000 2405 static const u32 div_10M[] = 2406 {2*_5M, 3*_5M, 4*_5M, 6*_5M, 8*_5M, 12*_5M, 16*_5M}; 2407 2408 /* 2409 * SYMBIOS chips allow burst lengths of 2, 4, 8, 16, 32, 64, 2410 * 128 transfers. All chips support at least 16 transfers 2411 * bursts. The 825A, 875 and 895 chips support bursts of up 2412 * to 128 transfers and the 895A and 896 support bursts of up 2413 * to 64 transfers. All other chips support up to 16 2414 * transfers bursts. 2415 * 2416 * For PCI 32 bit data transfers each transfer is a DWORD. 2417 * It is a QUADWORD (8 bytes) for PCI 64 bit data transfers. 2418 * 2419 * We use log base 2 (burst length) as internal code, with 2420 * value 0 meaning "burst disabled". 2421 */ 2422 2423 /* 2424 * Burst length from burst code. 2425 */ 2426 #define burst_length(bc) (!(bc))? 0 : 1 << (bc) 2427 2428 /* 2429 * Burst code from io register bits. 2430 */ 2431 #define burst_code(dmode, ctest4, ctest5) \ 2432 (ctest4) & 0x80? 0 : (((dmode) & 0xc0) >> 6) + ((ctest5) & 0x04) + 1 2433 2434 /* 2435 * Set initial io register bits from burst code. 2436 */ 2437 static __inline void sym_init_burst(hcb_p np, u_char bc) 2438 { 2439 np->rv_ctest4 &= ~0x80; 2440 np->rv_dmode &= ~(0x3 << 6); 2441 np->rv_ctest5 &= ~0x4; 2442 2443 if (!bc) { 2444 np->rv_ctest4 |= 0x80; 2445 } 2446 else { 2447 --bc; 2448 np->rv_dmode |= ((bc & 0x3) << 6); 2449 np->rv_ctest5 |= (bc & 0x4); 2450 } 2451 } 2452 2453 2454 /* 2455 * Print out the list of targets that have some flag disabled by user. 2456 */ 2457 static void sym_print_targets_flag(hcb_p np, int mask, char *msg) 2458 { 2459 int cnt; 2460 int i; 2461 2462 for (cnt = 0, i = 0 ; i < SYM_CONF_MAX_TARGET ; i++) { 2463 if (i == np->myaddr) 2464 continue; 2465 if (np->target[i].usrflags & mask) { 2466 if (!cnt++) 2467 kprintf("%s: %s disabled for targets", 2468 sym_name(np), msg); 2469 kprintf(" %d", i); 2470 } 2471 } 2472 if (cnt) 2473 kprintf(".\n"); 2474 } 2475 2476 /* 2477 * Save initial settings of some IO registers. 2478 * Assumed to have been set by BIOS. 2479 * We cannot reset the chip prior to reading the 2480 * IO registers, since informations will be lost. 2481 * Since the SCRIPTS processor may be running, this 2482 * is not safe on paper, but it seems to work quite 2483 * well. :) 2484 */ 2485 static void sym_save_initial_setting (hcb_p np) 2486 { 2487 np->sv_scntl0 = INB(nc_scntl0) & 0x0a; 2488 np->sv_scntl3 = INB(nc_scntl3) & 0x07; 2489 np->sv_dmode = INB(nc_dmode) & 0xce; 2490 np->sv_dcntl = INB(nc_dcntl) & 0xa8; 2491 np->sv_ctest3 = INB(nc_ctest3) & 0x01; 2492 np->sv_ctest4 = INB(nc_ctest4) & 0x80; 2493 np->sv_gpcntl = INB(nc_gpcntl); 2494 np->sv_stest1 = INB(nc_stest1); 2495 np->sv_stest2 = INB(nc_stest2) & 0x20; 2496 np->sv_stest4 = INB(nc_stest4); 2497 if (np->features & FE_C10) { /* Always large DMA fifo + ultra3 */ 2498 np->sv_scntl4 = INB(nc_scntl4); 2499 np->sv_ctest5 = INB(nc_ctest5) & 0x04; 2500 } 2501 else 2502 np->sv_ctest5 = INB(nc_ctest5) & 0x24; 2503 } 2504 2505 /* 2506 * Prepare io register values used by sym_init() according 2507 * to selected and supported features. 2508 */ 2509 static int sym_prepare_setting(hcb_p np, struct sym_nvram *nvram) 2510 { 2511 u_char burst_max; 2512 u32 period; 2513 int i; 2514 2515 /* 2516 * Wide ? 2517 */ 2518 np->maxwide = (np->features & FE_WIDE)? 1 : 0; 2519 2520 /* 2521 * Get the frequency of the chip's clock. 2522 */ 2523 if (np->features & FE_QUAD) 2524 np->multiplier = 4; 2525 else if (np->features & FE_DBLR) 2526 np->multiplier = 2; 2527 else 2528 np->multiplier = 1; 2529 2530 np->clock_khz = (np->features & FE_CLK80)? 80000 : 40000; 2531 np->clock_khz *= np->multiplier; 2532 2533 if (np->clock_khz != 40000) 2534 sym_getclock(np, np->multiplier); 2535 2536 /* 2537 * Divisor to be used for async (timer pre-scaler). 2538 */ 2539 i = np->clock_divn - 1; 2540 while (--i >= 0) { 2541 if (10ul * SYM_CONF_MIN_ASYNC * np->clock_khz > div_10M[i]) { 2542 ++i; 2543 break; 2544 } 2545 } 2546 np->rv_scntl3 = i+1; 2547 2548 /* 2549 * The C1010 uses hardwired divisors for async. 2550 * So, we just throw away, the async. divisor.:-) 2551 */ 2552 if (np->features & FE_C10) 2553 np->rv_scntl3 = 0; 2554 2555 /* 2556 * Minimum synchronous period factor supported by the chip. 2557 * Btw, 'period' is in tenths of nanoseconds. 2558 */ 2559 period = (4 * div_10M[0] + np->clock_khz - 1) / np->clock_khz; 2560 if (period <= 250) np->minsync = 10; 2561 else if (period <= 303) np->minsync = 11; 2562 else if (period <= 500) np->minsync = 12; 2563 else np->minsync = (period + 40 - 1) / 40; 2564 2565 /* 2566 * Check against chip SCSI standard support (SCSI-2,ULTRA,ULTRA2). 2567 */ 2568 if (np->minsync < 25 && 2569 !(np->features & (FE_ULTRA|FE_ULTRA2|FE_ULTRA3))) 2570 np->minsync = 25; 2571 else if (np->minsync < 12 && 2572 !(np->features & (FE_ULTRA2|FE_ULTRA3))) 2573 np->minsync = 12; 2574 2575 /* 2576 * Maximum synchronous period factor supported by the chip. 2577 */ 2578 period = (11 * div_10M[np->clock_divn - 1]) / (4 * np->clock_khz); 2579 np->maxsync = period > 2540 ? 254 : period / 10; 2580 2581 /* 2582 * If chip is a C1010, guess the sync limits in DT mode. 2583 */ 2584 if ((np->features & (FE_C10|FE_ULTRA3)) == (FE_C10|FE_ULTRA3)) { 2585 if (np->clock_khz == 160000) { 2586 np->minsync_dt = 9; 2587 np->maxsync_dt = 50; 2588 np->maxoffs_dt = 62; 2589 } 2590 } 2591 2592 /* 2593 * 64 bit addressing (895A/896/1010) ? 2594 */ 2595 if (np->features & FE_DAC) 2596 #ifdef __LP64__ 2597 np->rv_ccntl1 |= (XTIMOD | EXTIBMV); 2598 #else 2599 np->rv_ccntl1 |= (DDAC); 2600 #endif 2601 2602 /* 2603 * Phase mismatch handled by SCRIPTS (895A/896/1010) ? 2604 */ 2605 if (np->features & FE_NOPM) 2606 np->rv_ccntl0 |= (ENPMJ); 2607 2608 /* 2609 * C1010 Errata. 2610 * In dual channel mode, contention occurs if internal cycles 2611 * are used. Disable internal cycles. 2612 */ 2613 if (np->device_id == PCI_ID_LSI53C1010 && 2614 np->revision_id < 0x2) 2615 np->rv_ccntl0 |= DILS; 2616 2617 /* 2618 * Select burst length (dwords) 2619 */ 2620 burst_max = SYM_SETUP_BURST_ORDER; 2621 if (burst_max == 255) 2622 burst_max = burst_code(np->sv_dmode, np->sv_ctest4, 2623 np->sv_ctest5); 2624 if (burst_max > 7) 2625 burst_max = 7; 2626 if (burst_max > np->maxburst) 2627 burst_max = np->maxburst; 2628 2629 /* 2630 * DEL 352 - 53C810 Rev x11 - Part Number 609-0392140 - ITEM 2. 2631 * This chip and the 860 Rev 1 may wrongly use PCI cache line 2632 * based transactions on LOAD/STORE instructions. So we have 2633 * to prevent these chips from using such PCI transactions in 2634 * this driver. The generic ncr driver that does not use 2635 * LOAD/STORE instructions does not need this work-around. 2636 */ 2637 if ((np->device_id == PCI_ID_SYM53C810 && 2638 np->revision_id >= 0x10 && np->revision_id <= 0x11) || 2639 (np->device_id == PCI_ID_SYM53C860 && 2640 np->revision_id <= 0x1)) 2641 np->features &= ~(FE_WRIE|FE_ERL|FE_ERMP); 2642 2643 /* 2644 * Select all supported special features. 2645 * If we are using on-board RAM for scripts, prefetch (PFEN) 2646 * does not help, but burst op fetch (BOF) does. 2647 * Disabling PFEN makes sure BOF will be used. 2648 */ 2649 if (np->features & FE_ERL) 2650 np->rv_dmode |= ERL; /* Enable Read Line */ 2651 if (np->features & FE_BOF) 2652 np->rv_dmode |= BOF; /* Burst Opcode Fetch */ 2653 if (np->features & FE_ERMP) 2654 np->rv_dmode |= ERMP; /* Enable Read Multiple */ 2655 #if 1 2656 if ((np->features & FE_PFEN) && !np->ram_ba) 2657 #else 2658 if (np->features & FE_PFEN) 2659 #endif 2660 np->rv_dcntl |= PFEN; /* Prefetch Enable */ 2661 if (np->features & FE_CLSE) 2662 np->rv_dcntl |= CLSE; /* Cache Line Size Enable */ 2663 if (np->features & FE_WRIE) 2664 np->rv_ctest3 |= WRIE; /* Write and Invalidate */ 2665 if (np->features & FE_DFS) 2666 np->rv_ctest5 |= DFS; /* Dma Fifo Size */ 2667 2668 /* 2669 * Select some other 2670 */ 2671 if (SYM_SETUP_PCI_PARITY) 2672 np->rv_ctest4 |= MPEE; /* Master parity checking */ 2673 if (SYM_SETUP_SCSI_PARITY) 2674 np->rv_scntl0 |= 0x0a; /* full arb., ena parity, par->ATN */ 2675 2676 /* 2677 * Get parity checking, host ID and verbose mode from NVRAM 2678 */ 2679 np->myaddr = 255; 2680 sym_nvram_setup_host (np, nvram); 2681 #ifdef __sparc64__ 2682 np->myaddr = OF_getscsinitid(np->device); 2683 #endif 2684 2685 /* 2686 * Get SCSI addr of host adapter (set by bios?). 2687 */ 2688 if (np->myaddr == 255) { 2689 np->myaddr = INB(nc_scid) & 0x07; 2690 if (!np->myaddr) 2691 np->myaddr = SYM_SETUP_HOST_ID; 2692 } 2693 2694 /* 2695 * Prepare initial io register bits for burst length 2696 */ 2697 sym_init_burst(np, burst_max); 2698 2699 /* 2700 * Set SCSI BUS mode. 2701 * - LVD capable chips (895/895A/896/1010) report the 2702 * current BUS mode through the STEST4 IO register. 2703 * - For previous generation chips (825/825A/875), 2704 * user has to tell us how to check against HVD, 2705 * since a 100% safe algorithm is not possible. 2706 */ 2707 np->scsi_mode = SMODE_SE; 2708 if (np->features & (FE_ULTRA2|FE_ULTRA3)) 2709 np->scsi_mode = (np->sv_stest4 & SMODE); 2710 else if (np->features & FE_DIFF) { 2711 if (SYM_SETUP_SCSI_DIFF == 1) { 2712 if (np->sv_scntl3) { 2713 if (np->sv_stest2 & 0x20) 2714 np->scsi_mode = SMODE_HVD; 2715 } 2716 else if (nvram->type == SYM_SYMBIOS_NVRAM) { 2717 if (!(INB(nc_gpreg) & 0x08)) 2718 np->scsi_mode = SMODE_HVD; 2719 } 2720 } 2721 else if (SYM_SETUP_SCSI_DIFF == 2) 2722 np->scsi_mode = SMODE_HVD; 2723 } 2724 if (np->scsi_mode == SMODE_HVD) 2725 np->rv_stest2 |= 0x20; 2726 2727 /* 2728 * Set LED support from SCRIPTS. 2729 * Ignore this feature for boards known to use a 2730 * specific GPIO wiring and for the 895A, 896 2731 * and 1010 that drive the LED directly. 2732 */ 2733 if ((SYM_SETUP_SCSI_LED || 2734 (nvram->type == SYM_SYMBIOS_NVRAM || 2735 (nvram->type == SYM_TEKRAM_NVRAM && 2736 np->device_id == PCI_ID_SYM53C895))) && 2737 !(np->features & FE_LEDC) && !(np->sv_gpcntl & 0x01)) 2738 np->features |= FE_LED0; 2739 2740 /* 2741 * Set irq mode. 2742 */ 2743 switch(SYM_SETUP_IRQ_MODE & 3) { 2744 case 2: 2745 np->rv_dcntl |= IRQM; 2746 break; 2747 case 1: 2748 np->rv_dcntl |= (np->sv_dcntl & IRQM); 2749 break; 2750 default: 2751 break; 2752 } 2753 2754 /* 2755 * Configure targets according to driver setup. 2756 * If NVRAM present get targets setup from NVRAM. 2757 */ 2758 for (i = 0 ; i < SYM_CONF_MAX_TARGET ; i++) { 2759 tcb_p tp = &np->target[i]; 2760 2761 tp->tinfo.user.scsi_version = tp->tinfo.current.scsi_version= 2; 2762 tp->tinfo.user.spi_version = tp->tinfo.current.spi_version = 2; 2763 tp->tinfo.user.period = np->minsync; 2764 if (np->features & FE_ULTRA3) 2765 tp->tinfo.user.period = np->minsync_dt; 2766 tp->tinfo.user.offset = np->maxoffs; 2767 tp->tinfo.user.width = np->maxwide ? BUS_16_BIT : BUS_8_BIT; 2768 tp->usrflags |= (SYM_DISC_ENABLED | SYM_TAGS_ENABLED); 2769 tp->usrtags = SYM_SETUP_MAX_TAG; 2770 2771 sym_nvram_setup_target (np, i, nvram); 2772 2773 /* 2774 * For now, guess PPR/DT support from the period 2775 * and BUS width. 2776 */ 2777 if (np->features & FE_ULTRA3) { 2778 if (tp->tinfo.user.period <= 9 && 2779 tp->tinfo.user.width == BUS_16_BIT) { 2780 tp->tinfo.user.options |= PPR_OPT_DT; 2781 tp->tinfo.user.offset = np->maxoffs_dt; 2782 tp->tinfo.user.spi_version = 3; 2783 } 2784 } 2785 2786 if (!tp->usrtags) 2787 tp->usrflags &= ~SYM_TAGS_ENABLED; 2788 } 2789 2790 /* 2791 * Let user know about the settings. 2792 */ 2793 i = nvram->type; 2794 kprintf("%s: %s NVRAM, ID %d, Fast-%d, %s, %s\n", sym_name(np), 2795 i == SYM_SYMBIOS_NVRAM ? "Symbios" : 2796 (i == SYM_TEKRAM_NVRAM ? "Tekram" : "No"), 2797 np->myaddr, 2798 (np->features & FE_ULTRA3) ? 80 : 2799 (np->features & FE_ULTRA2) ? 40 : 2800 (np->features & FE_ULTRA) ? 20 : 10, 2801 sym_scsi_bus_mode(np->scsi_mode), 2802 (np->rv_scntl0 & 0xa) ? "parity checking" : "NO parity"); 2803 /* 2804 * Tell him more on demand. 2805 */ 2806 if (sym_verbose) { 2807 kprintf("%s: %s IRQ line driver%s\n", 2808 sym_name(np), 2809 np->rv_dcntl & IRQM ? "totem pole" : "open drain", 2810 np->ram_ba ? ", using on-chip SRAM" : ""); 2811 kprintf("%s: using %s firmware.\n", sym_name(np), np->fw_name); 2812 if (np->features & FE_NOPM) 2813 kprintf("%s: handling phase mismatch from SCRIPTS.\n", 2814 sym_name(np)); 2815 } 2816 /* 2817 * And still more. 2818 */ 2819 if (sym_verbose > 1) { 2820 kprintf ("%s: initial SCNTL3/DMODE/DCNTL/CTEST3/4/5 = " 2821 "(hex) %02x/%02x/%02x/%02x/%02x/%02x\n", 2822 sym_name(np), np->sv_scntl3, np->sv_dmode, np->sv_dcntl, 2823 np->sv_ctest3, np->sv_ctest4, np->sv_ctest5); 2824 2825 kprintf ("%s: final SCNTL3/DMODE/DCNTL/CTEST3/4/5 = " 2826 "(hex) %02x/%02x/%02x/%02x/%02x/%02x\n", 2827 sym_name(np), np->rv_scntl3, np->rv_dmode, np->rv_dcntl, 2828 np->rv_ctest3, np->rv_ctest4, np->rv_ctest5); 2829 } 2830 /* 2831 * Let user be aware of targets that have some disable flags set. 2832 */ 2833 sym_print_targets_flag(np, SYM_SCAN_BOOT_DISABLED, "SCAN AT BOOT"); 2834 if (sym_verbose) 2835 sym_print_targets_flag(np, SYM_SCAN_LUNS_DISABLED, 2836 "SCAN FOR LUNS"); 2837 2838 return 0; 2839 } 2840 2841 /* 2842 * Prepare the next negotiation message if needed. 2843 * 2844 * Fill in the part of message buffer that contains the 2845 * negotiation and the nego_status field of the CCB. 2846 * Returns the size of the message in bytes. 2847 */ 2848 2849 static int sym_prepare_nego(hcb_p np, ccb_p cp, int nego, u_char *msgptr) 2850 { 2851 tcb_p tp = &np->target[cp->target]; 2852 int msglen = 0; 2853 2854 /* 2855 * Early C1010 chips need a work-around for DT 2856 * data transfer to work. 2857 */ 2858 if (!(np->features & FE_U3EN)) 2859 tp->tinfo.goal.options = 0; 2860 /* 2861 * negotiate using PPR ? 2862 */ 2863 if (tp->tinfo.goal.options & PPR_OPT_MASK) 2864 nego = NS_PPR; 2865 /* 2866 * negotiate wide transfers ? 2867 */ 2868 else if (tp->tinfo.current.width != tp->tinfo.goal.width) 2869 nego = NS_WIDE; 2870 /* 2871 * negotiate synchronous transfers? 2872 */ 2873 else if (tp->tinfo.current.period != tp->tinfo.goal.period || 2874 tp->tinfo.current.offset != tp->tinfo.goal.offset) 2875 nego = NS_SYNC; 2876 2877 switch (nego) { 2878 case NS_SYNC: 2879 msgptr[msglen++] = M_EXTENDED; 2880 msgptr[msglen++] = 3; 2881 msgptr[msglen++] = M_X_SYNC_REQ; 2882 msgptr[msglen++] = tp->tinfo.goal.period; 2883 msgptr[msglen++] = tp->tinfo.goal.offset; 2884 break; 2885 case NS_WIDE: 2886 msgptr[msglen++] = M_EXTENDED; 2887 msgptr[msglen++] = 2; 2888 msgptr[msglen++] = M_X_WIDE_REQ; 2889 msgptr[msglen++] = tp->tinfo.goal.width; 2890 break; 2891 case NS_PPR: 2892 msgptr[msglen++] = M_EXTENDED; 2893 msgptr[msglen++] = 6; 2894 msgptr[msglen++] = M_X_PPR_REQ; 2895 msgptr[msglen++] = tp->tinfo.goal.period; 2896 msgptr[msglen++] = 0; 2897 msgptr[msglen++] = tp->tinfo.goal.offset; 2898 msgptr[msglen++] = tp->tinfo.goal.width; 2899 msgptr[msglen++] = tp->tinfo.goal.options & PPR_OPT_DT; 2900 break; 2901 } 2902 2903 cp->nego_status = nego; 2904 2905 if (nego) { 2906 tp->nego_cp = cp; /* Keep track a nego will be performed */ 2907 if (DEBUG_FLAGS & DEBUG_NEGO) { 2908 sym_print_msg(cp, nego == NS_SYNC ? "sync msgout" : 2909 nego == NS_WIDE ? "wide msgout" : 2910 "ppr msgout", msgptr); 2911 } 2912 } 2913 2914 return msglen; 2915 } 2916 2917 /* 2918 * Insert a job into the start queue. 2919 */ 2920 static void sym_put_start_queue(hcb_p np, ccb_p cp) 2921 { 2922 u_short qidx; 2923 2924 #ifdef SYM_CONF_IARB_SUPPORT 2925 /* 2926 * If the previously queued CCB is not yet done, 2927 * set the IARB hint. The SCRIPTS will go with IARB 2928 * for this job when starting the previous one. 2929 * We leave devices a chance to win arbitration by 2930 * not using more than 'iarb_max' consecutive 2931 * immediate arbitrations. 2932 */ 2933 if (np->last_cp && np->iarb_count < np->iarb_max) { 2934 np->last_cp->host_flags |= HF_HINT_IARB; 2935 ++np->iarb_count; 2936 } 2937 else 2938 np->iarb_count = 0; 2939 np->last_cp = cp; 2940 #endif 2941 2942 /* 2943 * Insert first the idle task and then our job. 2944 * The MB should ensure proper ordering. 2945 */ 2946 qidx = np->squeueput + 2; 2947 if (qidx >= MAX_QUEUE*2) qidx = 0; 2948 2949 np->squeue [qidx] = cpu_to_scr(np->idletask_ba); 2950 MEMORY_BARRIER(); 2951 np->squeue [np->squeueput] = cpu_to_scr(cp->ccb_ba); 2952 2953 np->squeueput = qidx; 2954 2955 if (DEBUG_FLAGS & DEBUG_QUEUE) 2956 kprintf ("%s: queuepos=%d.\n", sym_name (np), np->squeueput); 2957 2958 /* 2959 * Script processor may be waiting for reselect. 2960 * Wake it up. 2961 */ 2962 MEMORY_BARRIER(); 2963 OUTB (nc_istat, SIGP|np->istat_sem); 2964 } 2965 2966 2967 /* 2968 * Soft reset the chip. 2969 * 2970 * Raising SRST when the chip is running may cause 2971 * problems on dual function chips (see below). 2972 * On the other hand, LVD devices need some delay 2973 * to settle and report actual BUS mode in STEST4. 2974 */ 2975 static void sym_chip_reset (hcb_p np) 2976 { 2977 OUTB (nc_istat, SRST); 2978 UDELAY (10); 2979 OUTB (nc_istat, 0); 2980 UDELAY(2000); /* For BUS MODE to settle */ 2981 } 2982 2983 /* 2984 * Soft reset the chip. 2985 * 2986 * Some 896 and 876 chip revisions may hang-up if we set 2987 * the SRST (soft reset) bit at the wrong time when SCRIPTS 2988 * are running. 2989 * So, we need to abort the current operation prior to 2990 * soft resetting the chip. 2991 */ 2992 static void sym_soft_reset (hcb_p np) 2993 { 2994 u_char istat; 2995 int i; 2996 2997 OUTB (nc_istat, CABRT); 2998 for (i = 1000000 ; i ; --i) { 2999 istat = INB (nc_istat); 3000 if (istat & SIP) { 3001 INW (nc_sist); 3002 continue; 3003 } 3004 if (istat & DIP) { 3005 OUTB (nc_istat, 0); 3006 INB (nc_dstat); 3007 break; 3008 } 3009 } 3010 if (!i) 3011 kprintf("%s: unable to abort current chip operation.\n", 3012 sym_name(np)); 3013 sym_chip_reset (np); 3014 } 3015 3016 /* 3017 * Start reset process. 3018 * 3019 * The interrupt handler will reinitialize the chip. 3020 */ 3021 static void sym_start_reset(hcb_p np) 3022 { 3023 (void) sym_reset_scsi_bus(np, 1); 3024 } 3025 3026 static int sym_reset_scsi_bus(hcb_p np, int enab_int) 3027 { 3028 u32 term; 3029 int retv = 0; 3030 3031 sym_soft_reset(np); /* Soft reset the chip */ 3032 if (enab_int) 3033 OUTW (nc_sien, RST); 3034 /* 3035 * Enable Tolerant, reset IRQD if present and 3036 * properly set IRQ mode, prior to resetting the bus. 3037 */ 3038 OUTB (nc_stest3, TE); 3039 OUTB (nc_dcntl, (np->rv_dcntl & IRQM)); 3040 OUTB (nc_scntl1, CRST); 3041 UDELAY (200); 3042 3043 if (!SYM_SETUP_SCSI_BUS_CHECK) 3044 goto out; 3045 /* 3046 * Check for no terminators or SCSI bus shorts to ground. 3047 * Read SCSI data bus, data parity bits and control signals. 3048 * We are expecting RESET to be TRUE and other signals to be 3049 * FALSE. 3050 */ 3051 term = INB(nc_sstat0); 3052 term = ((term & 2) << 7) + ((term & 1) << 17); /* rst sdp0 */ 3053 term |= ((INB(nc_sstat2) & 0x01) << 26) | /* sdp1 */ 3054 ((INW(nc_sbdl) & 0xff) << 9) | /* d7-0 */ 3055 ((INW(nc_sbdl) & 0xff00) << 10) | /* d15-8 */ 3056 INB(nc_sbcl); /* req ack bsy sel atn msg cd io */ 3057 3058 if (!(np->features & FE_WIDE)) 3059 term &= 0x3ffff; 3060 3061 if (term != (2<<7)) { 3062 kprintf("%s: suspicious SCSI data while resetting the BUS.\n", 3063 sym_name(np)); 3064 kprintf("%s: %sdp0,d7-0,rst,req,ack,bsy,sel,atn,msg,c/d,i/o = " 3065 "0x%lx, expecting 0x%lx\n", 3066 sym_name(np), 3067 (np->features & FE_WIDE) ? "dp1,d15-8," : "", 3068 (u_long)term, (u_long)(2<<7)); 3069 if (SYM_SETUP_SCSI_BUS_CHECK == 1) 3070 retv = 1; 3071 } 3072 out: 3073 OUTB (nc_scntl1, 0); 3074 /* MDELAY(100); */ 3075 return retv; 3076 } 3077 3078 /* 3079 * The chip may have completed jobs. Look at the DONE QUEUE. 3080 * 3081 * On architectures that may reorder LOAD/STORE operations, 3082 * a memory barrier may be needed after the reading of the 3083 * so-called `flag' and prior to dealing with the data. 3084 */ 3085 static int sym_wakeup_done (hcb_p np) 3086 { 3087 ccb_p cp; 3088 int i, n; 3089 u32 dsa; 3090 3091 SYM_LOCK_ASSERT(LK_EXCLUSIVE); 3092 3093 n = 0; 3094 i = np->dqueueget; 3095 while (1) { 3096 dsa = scr_to_cpu(np->dqueue[i]); 3097 if (!dsa) 3098 break; 3099 np->dqueue[i] = 0; 3100 if ((i = i+2) >= MAX_QUEUE*2) 3101 i = 0; 3102 3103 cp = sym_ccb_from_dsa(np, dsa); 3104 if (cp) { 3105 MEMORY_BARRIER(); 3106 sym_complete_ok (np, cp); 3107 ++n; 3108 } 3109 else 3110 kprintf ("%s: bad DSA (%x) in done queue.\n", 3111 sym_name(np), (u_int) dsa); 3112 } 3113 np->dqueueget = i; 3114 3115 return n; 3116 } 3117 3118 /* 3119 * Complete all active CCBs with error. 3120 * Used on CHIP/SCSI RESET. 3121 */ 3122 static void sym_flush_busy_queue (hcb_p np, int cam_status) 3123 { 3124 /* 3125 * Move all active CCBs to the COMP queue 3126 * and flush this queue. 3127 */ 3128 sym_que_splice(&np->busy_ccbq, &np->comp_ccbq); 3129 sym_que_init(&np->busy_ccbq); 3130 sym_flush_comp_queue(np, cam_status); 3131 } 3132 3133 /* 3134 * Start chip. 3135 * 3136 * 'reason' means: 3137 * 0: initialisation. 3138 * 1: SCSI BUS RESET delivered or received. 3139 * 2: SCSI BUS MODE changed. 3140 */ 3141 static void sym_init (hcb_p np, int reason) 3142 { 3143 int i; 3144 u32 phys; 3145 3146 SYM_LOCK_ASSERT(LK_EXCLUSIVE); 3147 3148 /* 3149 * Reset chip if asked, otherwise just clear fifos. 3150 */ 3151 if (reason == 1) 3152 sym_soft_reset(np); 3153 else { 3154 OUTB (nc_stest3, TE|CSF); 3155 OUTONB (nc_ctest3, CLF); 3156 } 3157 3158 /* 3159 * Clear Start Queue 3160 */ 3161 phys = np->squeue_ba; 3162 for (i = 0; i < MAX_QUEUE*2; i += 2) { 3163 np->squeue[i] = cpu_to_scr(np->idletask_ba); 3164 np->squeue[i+1] = cpu_to_scr(phys + (i+2)*4); 3165 } 3166 np->squeue[MAX_QUEUE*2-1] = cpu_to_scr(phys); 3167 3168 /* 3169 * Start at first entry. 3170 */ 3171 np->squeueput = 0; 3172 3173 /* 3174 * Clear Done Queue 3175 */ 3176 phys = np->dqueue_ba; 3177 for (i = 0; i < MAX_QUEUE*2; i += 2) { 3178 np->dqueue[i] = 0; 3179 np->dqueue[i+1] = cpu_to_scr(phys + (i+2)*4); 3180 } 3181 np->dqueue[MAX_QUEUE*2-1] = cpu_to_scr(phys); 3182 3183 /* 3184 * Start at first entry. 3185 */ 3186 np->dqueueget = 0; 3187 3188 /* 3189 * Install patches in scripts. 3190 * This also let point to first position the start 3191 * and done queue pointers used from SCRIPTS. 3192 */ 3193 np->fw_patch(np); 3194 3195 /* 3196 * Wakeup all pending jobs. 3197 */ 3198 sym_flush_busy_queue(np, CAM_SCSI_BUS_RESET); 3199 3200 /* 3201 * Init chip. 3202 */ 3203 OUTB (nc_istat, 0x00 ); /* Remove Reset, abort */ 3204 UDELAY (2000); /* The 895 needs time for the bus mode to settle */ 3205 3206 OUTB (nc_scntl0, np->rv_scntl0 | 0xc0); 3207 /* full arb., ena parity, par->ATN */ 3208 OUTB (nc_scntl1, 0x00); /* odd parity, and remove CRST!! */ 3209 3210 sym_selectclock(np, np->rv_scntl3); /* Select SCSI clock */ 3211 3212 OUTB (nc_scid , RRE|np->myaddr); /* Adapter SCSI address */ 3213 OUTW (nc_respid, 1ul<<np->myaddr); /* Id to respond to */ 3214 OUTB (nc_istat , SIGP ); /* Signal Process */ 3215 OUTB (nc_dmode , np->rv_dmode); /* Burst length, dma mode */ 3216 OUTB (nc_ctest5, np->rv_ctest5); /* Large fifo + large burst */ 3217 3218 OUTB (nc_dcntl , NOCOM|np->rv_dcntl); /* Protect SFBR */ 3219 OUTB (nc_ctest3, np->rv_ctest3); /* Write and invalidate */ 3220 OUTB (nc_ctest4, np->rv_ctest4); /* Master parity checking */ 3221 3222 /* Extended Sreq/Sack filtering not supported on the C10 */ 3223 if (np->features & FE_C10) 3224 OUTB (nc_stest2, np->rv_stest2); 3225 else 3226 OUTB (nc_stest2, EXT|np->rv_stest2); 3227 3228 OUTB (nc_stest3, TE); /* TolerANT enable */ 3229 OUTB (nc_stime0, 0x0c); /* HTH disabled STO 0.25 sec */ 3230 3231 /* 3232 * For now, disable AIP generation on C1010-66. 3233 */ 3234 if (np->device_id == PCI_ID_LSI53C1010_2) 3235 OUTB (nc_aipcntl1, DISAIP); 3236 3237 /* 3238 * C10101 Errata. 3239 * Errant SGE's when in narrow. Write bits 4 & 5 of 3240 * STEST1 register to disable SGE. We probably should do 3241 * that from SCRIPTS for each selection/reselection, but 3242 * I just don't want. :) 3243 */ 3244 if (np->device_id == PCI_ID_LSI53C1010 && 3245 /* np->revision_id < 0xff */ 1) 3246 OUTB (nc_stest1, INB(nc_stest1) | 0x30); 3247 3248 /* 3249 * DEL 441 - 53C876 Rev 5 - Part Number 609-0392787/2788 - ITEM 2. 3250 * Disable overlapped arbitration for some dual function devices, 3251 * regardless revision id (kind of post-chip-design feature. ;-)) 3252 */ 3253 if (np->device_id == PCI_ID_SYM53C875) 3254 OUTB (nc_ctest0, (1<<5)); 3255 else if (np->device_id == PCI_ID_SYM53C896) 3256 np->rv_ccntl0 |= DPR; 3257 3258 /* 3259 * Write CCNTL0/CCNTL1 for chips capable of 64 bit addressing 3260 * and/or hardware phase mismatch, since only such chips 3261 * seem to support those IO registers. 3262 */ 3263 if (np->features & (FE_DAC|FE_NOPM)) { 3264 OUTB (nc_ccntl0, np->rv_ccntl0); 3265 OUTB (nc_ccntl1, np->rv_ccntl1); 3266 } 3267 3268 /* 3269 * If phase mismatch handled by scripts (895A/896/1010), 3270 * set PM jump addresses. 3271 */ 3272 if (np->features & FE_NOPM) { 3273 OUTL (nc_pmjad1, SCRIPTB_BA (np, pm_handle)); 3274 OUTL (nc_pmjad2, SCRIPTB_BA (np, pm_handle)); 3275 } 3276 3277 /* 3278 * Enable GPIO0 pin for writing if LED support from SCRIPTS. 3279 * Also set GPIO5 and clear GPIO6 if hardware LED control. 3280 */ 3281 if (np->features & FE_LED0) 3282 OUTB(nc_gpcntl, INB(nc_gpcntl) & ~0x01); 3283 else if (np->features & FE_LEDC) 3284 OUTB(nc_gpcntl, (INB(nc_gpcntl) & ~0x41) | 0x20); 3285 3286 /* 3287 * enable ints 3288 */ 3289 OUTW (nc_sien , STO|HTH|MA|SGE|UDC|RST|PAR); 3290 OUTB (nc_dien , MDPE|BF|SSI|SIR|IID); 3291 3292 /* 3293 * For 895/6 enable SBMC interrupt and save current SCSI bus mode. 3294 * Try to eat the spurious SBMC interrupt that may occur when 3295 * we reset the chip but not the SCSI BUS (at initialization). 3296 */ 3297 if (np->features & (FE_ULTRA2|FE_ULTRA3)) { 3298 OUTONW (nc_sien, SBMC); 3299 if (reason == 0) { 3300 MDELAY(100); 3301 INW (nc_sist); 3302 } 3303 np->scsi_mode = INB (nc_stest4) & SMODE; 3304 } 3305 3306 /* 3307 * Fill in target structure. 3308 * Reinitialize usrsync. 3309 * Reinitialize usrwide. 3310 * Prepare sync negotiation according to actual SCSI bus mode. 3311 */ 3312 for (i=0;i<SYM_CONF_MAX_TARGET;i++) { 3313 tcb_p tp = &np->target[i]; 3314 3315 tp->to_reset = 0; 3316 tp->head.sval = 0; 3317 tp->head.wval = np->rv_scntl3; 3318 tp->head.uval = 0; 3319 3320 tp->tinfo.current.period = 0; 3321 tp->tinfo.current.offset = 0; 3322 tp->tinfo.current.width = BUS_8_BIT; 3323 tp->tinfo.current.options = 0; 3324 } 3325 3326 /* 3327 * Download SCSI SCRIPTS to on-chip RAM if present, 3328 * and start script processor. 3329 */ 3330 if (np->ram_ba) { 3331 if (sym_verbose > 1) 3332 kprintf ("%s: Downloading SCSI SCRIPTS.\n", 3333 sym_name(np)); 3334 if (np->ram_ws == 8192) { 3335 OUTRAM_OFF(4096, np->scriptb0, np->scriptb_sz); 3336 OUTL (nc_mmws, np->scr_ram_seg); 3337 OUTL (nc_mmrs, np->scr_ram_seg); 3338 OUTL (nc_sfs, np->scr_ram_seg); 3339 phys = SCRIPTB_BA (np, start64); 3340 } 3341 else 3342 phys = SCRIPTA_BA (np, init); 3343 OUTRAM_OFF(0, np->scripta0, np->scripta_sz); 3344 } 3345 else 3346 phys = SCRIPTA_BA (np, init); 3347 3348 np->istat_sem = 0; 3349 3350 OUTL (nc_dsa, np->hcb_ba); 3351 OUTL_DSP (phys); 3352 3353 /* 3354 * Notify the XPT about the RESET condition. 3355 */ 3356 if (reason != 0) 3357 xpt_async(AC_BUS_RESET, np->path, NULL); 3358 } 3359 3360 /* 3361 * Get clock factor and sync divisor for a given 3362 * synchronous factor period. 3363 */ 3364 static int 3365 sym_getsync(hcb_p np, u_char dt, u_char sfac, u_char *divp, u_char *fakp) 3366 { 3367 u32 clk = np->clock_khz; /* SCSI clock frequency in kHz */ 3368 int div = np->clock_divn; /* Number of divisors supported */ 3369 u32 fak; /* Sync factor in sxfer */ 3370 u32 per; /* Period in tenths of ns */ 3371 u32 kpc; /* (per * clk) */ 3372 int ret; 3373 3374 /* 3375 * Compute the synchronous period in tenths of nano-seconds 3376 */ 3377 if (dt && sfac <= 9) per = 125; 3378 else if (sfac <= 10) per = 250; 3379 else if (sfac == 11) per = 303; 3380 else if (sfac == 12) per = 500; 3381 else per = 40 * sfac; 3382 ret = per; 3383 3384 kpc = per * clk; 3385 if (dt) 3386 kpc <<= 1; 3387 3388 /* 3389 * For earliest C10 revision 0, we cannot use extra 3390 * clocks for the setting of the SCSI clocking. 3391 * Note that this limits the lowest sync data transfer 3392 * to 5 Mega-transfers per second and may result in 3393 * using higher clock divisors. 3394 */ 3395 #if 1 3396 if ((np->features & (FE_C10|FE_U3EN)) == FE_C10) { 3397 /* 3398 * Look for the lowest clock divisor that allows an 3399 * output speed not faster than the period. 3400 */ 3401 while (div > 0) { 3402 --div; 3403 if (kpc > (div_10M[div] << 2)) { 3404 ++div; 3405 break; 3406 } 3407 } 3408 fak = 0; /* No extra clocks */ 3409 if (div == np->clock_divn) { /* Are we too fast ? */ 3410 ret = -1; 3411 } 3412 *divp = div; 3413 *fakp = fak; 3414 return ret; 3415 } 3416 #endif 3417 3418 /* 3419 * Look for the greatest clock divisor that allows an 3420 * input speed faster than the period. 3421 */ 3422 while (div-- > 0) 3423 if (kpc >= (div_10M[div] << 2)) break; 3424 3425 /* 3426 * Calculate the lowest clock factor that allows an output 3427 * speed not faster than the period, and the max output speed. 3428 * If fak >= 1 we will set both XCLKH_ST and XCLKH_DT. 3429 * If fak >= 2 we will also set XCLKS_ST and XCLKS_DT. 3430 */ 3431 if (dt) { 3432 fak = (kpc - 1) / (div_10M[div] << 1) + 1 - 2; 3433 /* ret = ((2+fak)*div_10M[div])/np->clock_khz; */ 3434 } 3435 else { 3436 fak = (kpc - 1) / div_10M[div] + 1 - 4; 3437 /* ret = ((4+fak)*div_10M[div])/np->clock_khz; */ 3438 } 3439 3440 /* 3441 * Check against our hardware limits, or bugs :). 3442 */ 3443 if (fak < 0) {fak = 0; ret = -1;} 3444 if (fak > 2) {fak = 2; ret = -1;} 3445 3446 /* 3447 * Compute and return sync parameters. 3448 */ 3449 *divp = div; 3450 *fakp = fak; 3451 3452 return ret; 3453 } 3454 3455 /* 3456 * Tell the SCSI layer about the new transfer parameters. 3457 */ 3458 static void 3459 sym_xpt_async_transfer_neg(hcb_p np, int target, u_int spi_valid) 3460 { 3461 struct ccb_trans_settings cts; 3462 struct cam_path *path; 3463 int sts; 3464 tcb_p tp = &np->target[target]; 3465 3466 sts = xpt_create_path(&path, NULL, cam_sim_path(np->sim), target, 3467 CAM_LUN_WILDCARD); 3468 if (sts != CAM_REQ_CMP) 3469 return; 3470 3471 bzero(&cts, sizeof(cts)); 3472 3473 #define cts__scsi (cts.proto_specific.scsi) 3474 #define cts__spi (cts.xport_specific.spi) 3475 3476 cts.type = CTS_TYPE_CURRENT_SETTINGS; 3477 cts.protocol = PROTO_SCSI; 3478 cts.transport = XPORT_SPI; 3479 cts.protocol_version = tp->tinfo.current.scsi_version; 3480 cts.transport_version = tp->tinfo.current.spi_version; 3481 3482 cts__spi.valid = spi_valid; 3483 if (spi_valid & CTS_SPI_VALID_SYNC_RATE) 3484 cts__spi.sync_period = tp->tinfo.current.period; 3485 if (spi_valid & CTS_SPI_VALID_SYNC_OFFSET) 3486 cts__spi.sync_offset = tp->tinfo.current.offset; 3487 if (spi_valid & CTS_SPI_VALID_BUS_WIDTH) 3488 cts__spi.bus_width = tp->tinfo.current.width; 3489 if (spi_valid & CTS_SPI_VALID_PPR_OPTIONS) 3490 cts__spi.ppr_options = tp->tinfo.current.options; 3491 #undef cts__spi 3492 #undef cts__scsi 3493 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 3494 xpt_async(AC_TRANSFER_NEG, path, &cts); 3495 xpt_free_path(path); 3496 } 3497 3498 #define SYM_SPI_VALID_WDTR \ 3499 CTS_SPI_VALID_BUS_WIDTH | \ 3500 CTS_SPI_VALID_SYNC_RATE | \ 3501 CTS_SPI_VALID_SYNC_OFFSET 3502 #define SYM_SPI_VALID_SDTR \ 3503 CTS_SPI_VALID_SYNC_RATE | \ 3504 CTS_SPI_VALID_SYNC_OFFSET 3505 #define SYM_SPI_VALID_PPR \ 3506 CTS_SPI_VALID_PPR_OPTIONS | \ 3507 CTS_SPI_VALID_BUS_WIDTH | \ 3508 CTS_SPI_VALID_SYNC_RATE | \ 3509 CTS_SPI_VALID_SYNC_OFFSET 3510 3511 /* 3512 * We received a WDTR. 3513 * Let everything be aware of the changes. 3514 */ 3515 static void sym_setwide(hcb_p np, ccb_p cp, u_char wide) 3516 { 3517 tcb_p tp = &np->target[cp->target]; 3518 3519 sym_settrans(np, cp, 0, 0, 0, wide, 0, 0); 3520 3521 /* 3522 * Tell the SCSI layer about the new transfer parameters. 3523 */ 3524 tp->tinfo.goal.width = tp->tinfo.current.width = wide; 3525 tp->tinfo.current.offset = 0; 3526 tp->tinfo.current.period = 0; 3527 tp->tinfo.current.options = 0; 3528 3529 sym_xpt_async_transfer_neg(np, cp->target, SYM_SPI_VALID_WDTR); 3530 } 3531 3532 /* 3533 * We received a SDTR. 3534 * Let everything be aware of the changes. 3535 */ 3536 static void 3537 sym_setsync(hcb_p np, ccb_p cp, u_char ofs, u_char per, u_char div, u_char fak) 3538 { 3539 tcb_p tp = &np->target[cp->target]; 3540 u_char wide = (cp->phys.select.sel_scntl3 & EWS) ? 1 : 0; 3541 3542 sym_settrans(np, cp, 0, ofs, per, wide, div, fak); 3543 3544 /* 3545 * Tell the SCSI layer about the new transfer parameters. 3546 */ 3547 tp->tinfo.goal.period = tp->tinfo.current.period = per; 3548 tp->tinfo.goal.offset = tp->tinfo.current.offset = ofs; 3549 tp->tinfo.goal.options = tp->tinfo.current.options = 0; 3550 3551 sym_xpt_async_transfer_neg(np, cp->target, SYM_SPI_VALID_SDTR); 3552 } 3553 3554 /* 3555 * We received a PPR. 3556 * Let everything be aware of the changes. 3557 */ 3558 static void sym_setpprot(hcb_p np, ccb_p cp, u_char dt, u_char ofs, 3559 u_char per, u_char wide, u_char div, u_char fak) 3560 { 3561 tcb_p tp = &np->target[cp->target]; 3562 3563 sym_settrans(np, cp, dt, ofs, per, wide, div, fak); 3564 3565 /* 3566 * Tell the SCSI layer about the new transfer parameters. 3567 */ 3568 tp->tinfo.goal.width = tp->tinfo.current.width = wide; 3569 tp->tinfo.goal.period = tp->tinfo.current.period = per; 3570 tp->tinfo.goal.offset = tp->tinfo.current.offset = ofs; 3571 tp->tinfo.goal.options = tp->tinfo.current.options = dt; 3572 3573 sym_xpt_async_transfer_neg(np, cp->target, SYM_SPI_VALID_PPR); 3574 } 3575 3576 /* 3577 * Switch trans mode for current job and it's target. 3578 */ 3579 static void sym_settrans(hcb_p np, ccb_p cp, u_char dt, u_char ofs, 3580 u_char per, u_char wide, u_char div, u_char fak) 3581 { 3582 SYM_QUEHEAD *qp; 3583 union ccb *ccb; 3584 tcb_p tp; 3585 u_char target = INB (nc_sdid) & 0x0f; 3586 u_char sval, wval, uval; 3587 3588 assert (cp); 3589 if (!cp) return; 3590 ccb = cp->cam_ccb; 3591 assert (ccb); 3592 if (!ccb) return; 3593 assert (target == (cp->target & 0xf)); 3594 tp = &np->target[target]; 3595 3596 sval = tp->head.sval; 3597 wval = tp->head.wval; 3598 uval = tp->head.uval; 3599 3600 #if 0 3601 kprintf("XXXX sval=%x wval=%x uval=%x (%x)\n", 3602 sval, wval, uval, np->rv_scntl3); 3603 #endif 3604 /* 3605 * Set the offset. 3606 */ 3607 if (!(np->features & FE_C10)) 3608 sval = (sval & ~0x1f) | ofs; 3609 else 3610 sval = (sval & ~0x3f) | ofs; 3611 3612 /* 3613 * Set the sync divisor and extra clock factor. 3614 */ 3615 if (ofs != 0) { 3616 wval = (wval & ~0x70) | ((div+1) << 4); 3617 if (!(np->features & FE_C10)) 3618 sval = (sval & ~0xe0) | (fak << 5); 3619 else { 3620 uval = uval & ~(XCLKH_ST|XCLKH_DT|XCLKS_ST|XCLKS_DT); 3621 if (fak >= 1) uval |= (XCLKH_ST|XCLKH_DT); 3622 if (fak >= 2) uval |= (XCLKS_ST|XCLKS_DT); 3623 } 3624 } 3625 3626 /* 3627 * Set the bus width. 3628 */ 3629 wval = wval & ~EWS; 3630 if (wide != 0) 3631 wval |= EWS; 3632 3633 /* 3634 * Set misc. ultra enable bits. 3635 */ 3636 if (np->features & FE_C10) { 3637 uval = uval & ~(U3EN|AIPCKEN); 3638 if (dt) { 3639 assert(np->features & FE_U3EN); 3640 uval |= U3EN; 3641 } 3642 } 3643 else { 3644 wval = wval & ~ULTRA; 3645 if (per <= 12) wval |= ULTRA; 3646 } 3647 3648 /* 3649 * Stop there if sync parameters are unchanged. 3650 */ 3651 if (tp->head.sval == sval && 3652 tp->head.wval == wval && 3653 tp->head.uval == uval) 3654 return; 3655 tp->head.sval = sval; 3656 tp->head.wval = wval; 3657 tp->head.uval = uval; 3658 3659 /* 3660 * Disable extended Sreq/Sack filtering if per < 50. 3661 * Not supported on the C1010. 3662 */ 3663 if (per < 50 && !(np->features & FE_C10)) 3664 OUTOFFB (nc_stest2, EXT); 3665 3666 /* 3667 * set actual value and sync_status 3668 */ 3669 OUTB (nc_sxfer, tp->head.sval); 3670 OUTB (nc_scntl3, tp->head.wval); 3671 3672 if (np->features & FE_C10) { 3673 OUTB (nc_scntl4, tp->head.uval); 3674 } 3675 3676 /* 3677 * patch ALL busy ccbs of this target. 3678 */ 3679 FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) { 3680 cp = sym_que_entry(qp, struct sym_ccb, link_ccbq); 3681 if (cp->target != target) 3682 continue; 3683 cp->phys.select.sel_scntl3 = tp->head.wval; 3684 cp->phys.select.sel_sxfer = tp->head.sval; 3685 if (np->features & FE_C10) { 3686 cp->phys.select.sel_scntl4 = tp->head.uval; 3687 } 3688 } 3689 } 3690 3691 /* 3692 * log message for real hard errors 3693 * 3694 * sym0 targ 0?: ERROR (ds:si) (so-si-sd) (sxfer/scntl3) @ name (dsp:dbc). 3695 * reg: r0 r1 r2 r3 r4 r5 r6 ..... rf. 3696 * 3697 * exception register: 3698 * ds: dstat 3699 * si: sist 3700 * 3701 * SCSI bus lines: 3702 * so: control lines as driven by chip. 3703 * si: control lines as seen by chip. 3704 * sd: scsi data lines as seen by chip. 3705 * 3706 * wide/fastmode: 3707 * sxfer: (see the manual) 3708 * scntl3: (see the manual) 3709 * 3710 * current script command: 3711 * dsp: script address (relative to start of script). 3712 * dbc: first word of script command. 3713 * 3714 * First 24 register of the chip: 3715 * r0..rf 3716 */ 3717 static void sym_log_hard_error(hcb_p np, u_short sist, u_char dstat) 3718 { 3719 u32 dsp; 3720 int script_ofs; 3721 int script_size; 3722 char *script_name; 3723 u_char *script_base; 3724 int i; 3725 3726 dsp = INL (nc_dsp); 3727 3728 if (dsp > np->scripta_ba && 3729 dsp <= np->scripta_ba + np->scripta_sz) { 3730 script_ofs = dsp - np->scripta_ba; 3731 script_size = np->scripta_sz; 3732 script_base = np->scripta0; 3733 script_name = "scripta"; 3734 } 3735 else if (np->scriptb_ba < dsp && 3736 dsp <= np->scriptb_ba + np->scriptb_sz) { 3737 script_ofs = dsp - np->scriptb_ba; 3738 script_size = np->scriptb_sz; 3739 script_base = np->scriptb0; 3740 script_name = "scriptb"; 3741 } else { 3742 script_ofs = dsp; 3743 script_size = 0; 3744 script_base = NULL; 3745 script_name = "mem"; 3746 } 3747 3748 kprintf ("%s:%d: ERROR (%x:%x) (%x-%x-%x) (%x/%x) @ (%s %x:%08x).\n", 3749 sym_name (np), (unsigned)INB (nc_sdid)&0x0f, dstat, sist, 3750 (unsigned)INB (nc_socl), (unsigned)INB (nc_sbcl), 3751 (unsigned)INB (nc_sbdl), (unsigned)INB (nc_sxfer), 3752 (unsigned)INB (nc_scntl3), script_name, script_ofs, 3753 (unsigned)INL (nc_dbc)); 3754 3755 if (((script_ofs & 3) == 0) && 3756 (unsigned)script_ofs < script_size) { 3757 kprintf ("%s: script cmd = %08x\n", sym_name(np), 3758 scr_to_cpu((int) *(u32 *)(script_base + script_ofs))); 3759 } 3760 3761 kprintf ("%s: regdump:", sym_name(np)); 3762 for (i=0; i<24;i++) 3763 kprintf (" %02x", (unsigned)INB_OFF(i)); 3764 kprintf (".\n"); 3765 3766 /* 3767 * PCI BUS error, read the PCI ststus register. 3768 */ 3769 if (dstat & (MDPE|BF)) { 3770 u_short pci_sts; 3771 pci_sts = pci_read_config(np->device, PCIR_STATUS, 2); 3772 if (pci_sts & 0xf900) { 3773 pci_write_config(np->device, PCIR_STATUS, pci_sts, 2); 3774 kprintf("%s: PCI STATUS = 0x%04x\n", 3775 sym_name(np), pci_sts & 0xf900); 3776 } 3777 } 3778 } 3779 3780 /* 3781 * chip interrupt handler 3782 * 3783 * In normal situations, interrupt conditions occur one at 3784 * a time. But when something bad happens on the SCSI BUS, 3785 * the chip may raise several interrupt flags before 3786 * stopping and interrupting the CPU. The additionnal 3787 * interrupt flags are stacked in some extra registers 3788 * after the SIP and/or DIP flag has been raised in the 3789 * ISTAT. After the CPU has read the interrupt condition 3790 * flag from SIST or DSTAT, the chip unstacks the other 3791 * interrupt flags and sets the corresponding bits in 3792 * SIST or DSTAT. Since the chip starts stacking once the 3793 * SIP or DIP flag is set, there is a small window of time 3794 * where the stacking does not occur. 3795 * 3796 * Typically, multiple interrupt conditions may happen in 3797 * the following situations: 3798 * 3799 * - SCSI parity error + Phase mismatch (PAR|MA) 3800 * When a parity error is detected in input phase 3801 * and the device switches to msg-in phase inside a 3802 * block MOV. 3803 * - SCSI parity error + Unexpected disconnect (PAR|UDC) 3804 * When a stupid device does not want to handle the 3805 * recovery of an SCSI parity error. 3806 * - Some combinations of STO, PAR, UDC, ... 3807 * When using non compliant SCSI stuff, when user is 3808 * doing non compliant hot tampering on the BUS, when 3809 * something really bad happens to a device, etc ... 3810 * 3811 * The heuristic suggested by SYMBIOS to handle 3812 * multiple interrupts is to try unstacking all 3813 * interrupts conditions and to handle them on some 3814 * priority based on error severity. 3815 * This will work when the unstacking has been 3816 * successful, but we cannot be 100 % sure of that, 3817 * since the CPU may have been faster to unstack than 3818 * the chip is able to stack. Hmmm ... But it seems that 3819 * such a situation is very unlikely to happen. 3820 * 3821 * If this happen, for example STO caught by the CPU 3822 * then UDC happenning before the CPU have restarted 3823 * the SCRIPTS, the driver may wrongly complete the 3824 * same command on UDC, since the SCRIPTS didn't restart 3825 * and the DSA still points to the same command. 3826 * We avoid this situation by setting the DSA to an 3827 * invalid value when the CCB is completed and before 3828 * restarting the SCRIPTS. 3829 * 3830 * Another issue is that we need some section of our 3831 * recovery procedures to be somehow uninterruptible but 3832 * the SCRIPTS processor does not provides such a 3833 * feature. For this reason, we handle recovery preferently 3834 * from the C code and check against some SCRIPTS critical 3835 * sections from the C code. 3836 * 3837 * Hopefully, the interrupt handling of the driver is now 3838 * able to resist to weird BUS error conditions, but donnot 3839 * ask me for any guarantee that it will never fail. :-) 3840 * Use at your own decision and risk. 3841 */ 3842 3843 static void sym_intr1 (hcb_p np) 3844 { 3845 u_char istat, istatc; 3846 u_char dstat; 3847 u_short sist; 3848 3849 SYM_LOCK_ASSERT(LK_EXCLUSIVE); 3850 3851 /* 3852 * interrupt on the fly ? 3853 * 3854 * A `dummy read' is needed to ensure that the 3855 * clear of the INTF flag reaches the device 3856 * before the scanning of the DONE queue. 3857 */ 3858 istat = INB (nc_istat); 3859 if (istat & INTF) { 3860 OUTB (nc_istat, (istat & SIGP) | INTF | np->istat_sem); 3861 istat = INB (nc_istat); /* DUMMY READ */ 3862 if (DEBUG_FLAGS & DEBUG_TINY) kprintf ("F "); 3863 (void)sym_wakeup_done (np); 3864 } 3865 3866 if (!(istat & (SIP|DIP))) 3867 return; 3868 3869 #if 0 /* We should never get this one */ 3870 if (istat & CABRT) 3871 OUTB (nc_istat, CABRT); 3872 #endif 3873 3874 /* 3875 * PAR and MA interrupts may occur at the same time, 3876 * and we need to know of both in order to handle 3877 * this situation properly. We try to unstack SCSI 3878 * interrupts for that reason. BTW, I dislike a LOT 3879 * such a loop inside the interrupt routine. 3880 * Even if DMA interrupt stacking is very unlikely to 3881 * happen, we also try unstacking these ones, since 3882 * this has no performance impact. 3883 */ 3884 sist = 0; 3885 dstat = 0; 3886 istatc = istat; 3887 do { 3888 if (istatc & SIP) 3889 sist |= INW (nc_sist); 3890 if (istatc & DIP) 3891 dstat |= INB (nc_dstat); 3892 istatc = INB (nc_istat); 3893 istat |= istatc; 3894 } while (istatc & (SIP|DIP)); 3895 3896 if (DEBUG_FLAGS & DEBUG_TINY) 3897 kprintf ("<%d|%x:%x|%x:%x>", 3898 (int)INB(nc_scr0), 3899 dstat,sist, 3900 (unsigned)INL(nc_dsp), 3901 (unsigned)INL(nc_dbc)); 3902 /* 3903 * On paper, a memory barrier may be needed here. 3904 * And since we are paranoid ... :) 3905 */ 3906 MEMORY_BARRIER(); 3907 3908 /* 3909 * First, interrupts we want to service cleanly. 3910 * 3911 * Phase mismatch (MA) is the most frequent interrupt 3912 * for chip earlier than the 896 and so we have to service 3913 * it as quickly as possible. 3914 * A SCSI parity error (PAR) may be combined with a phase 3915 * mismatch condition (MA). 3916 * Programmed interrupts (SIR) are used to call the C code 3917 * from SCRIPTS. 3918 * The single step interrupt (SSI) is not used in this 3919 * driver. 3920 */ 3921 if (!(sist & (STO|GEN|HTH|SGE|UDC|SBMC|RST)) && 3922 !(dstat & (MDPE|BF|ABRT|IID))) { 3923 if (sist & PAR) sym_int_par (np, sist); 3924 else if (sist & MA) sym_int_ma (np); 3925 else if (dstat & SIR) sym_int_sir (np); 3926 else if (dstat & SSI) OUTONB_STD (); 3927 else goto unknown_int; 3928 return; 3929 } 3930 3931 /* 3932 * Now, interrupts that donnot happen in normal 3933 * situations and that we may need to recover from. 3934 * 3935 * On SCSI RESET (RST), we reset everything. 3936 * On SCSI BUS MODE CHANGE (SBMC), we complete all 3937 * active CCBs with RESET status, prepare all devices 3938 * for negotiating again and restart the SCRIPTS. 3939 * On STO and UDC, we complete the CCB with the corres- 3940 * ponding status and restart the SCRIPTS. 3941 */ 3942 if (sist & RST) { 3943 xpt_print_path(np->path); 3944 kprintf("SCSI BUS reset detected.\n"); 3945 sym_init (np, 1); 3946 return; 3947 } 3948 3949 OUTB (nc_ctest3, np->rv_ctest3 | CLF); /* clear dma fifo */ 3950 OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */ 3951 3952 if (!(sist & (GEN|HTH|SGE)) && 3953 !(dstat & (MDPE|BF|ABRT|IID))) { 3954 if (sist & SBMC) sym_int_sbmc (np); 3955 else if (sist & STO) sym_int_sto (np); 3956 else if (sist & UDC) sym_int_udc (np); 3957 else goto unknown_int; 3958 return; 3959 } 3960 3961 /* 3962 * Now, interrupts we are not able to recover cleanly. 3963 * 3964 * Log message for hard errors. 3965 * Reset everything. 3966 */ 3967 3968 sym_log_hard_error(np, sist, dstat); 3969 3970 if ((sist & (GEN|HTH|SGE)) || 3971 (dstat & (MDPE|BF|ABRT|IID))) { 3972 sym_start_reset(np); 3973 return; 3974 } 3975 3976 unknown_int: 3977 /* 3978 * We just miss the cause of the interrupt. :( 3979 * Print a message. The timeout will do the real work. 3980 */ 3981 kprintf( "%s: unknown interrupt(s) ignored, " 3982 "ISTAT=0x%x DSTAT=0x%x SIST=0x%x\n", 3983 sym_name(np), istat, dstat, sist); 3984 } 3985 3986 static void sym_intr(void *arg) 3987 { 3988 hcb_p np = arg; 3989 3990 SYM_LOCK(); 3991 3992 if (DEBUG_FLAGS & DEBUG_TINY) kprintf ("["); 3993 sym_intr1((hcb_p) arg); 3994 if (DEBUG_FLAGS & DEBUG_TINY) kprintf ("]"); 3995 3996 SYM_UNLOCK(); 3997 } 3998 3999 static void sym_poll(struct cam_sim *sim) 4000 { 4001 sym_intr1(cam_sim_softc(sim)); 4002 } 4003 4004 4005 /* 4006 * generic recovery from scsi interrupt 4007 * 4008 * The doc says that when the chip gets an SCSI interrupt, 4009 * it tries to stop in an orderly fashion, by completing 4010 * an instruction fetch that had started or by flushing 4011 * the DMA fifo for a write to memory that was executing. 4012 * Such a fashion is not enough to know if the instruction 4013 * that was just before the current DSP value has been 4014 * executed or not. 4015 * 4016 * There are some small SCRIPTS sections that deal with 4017 * the start queue and the done queue that may break any 4018 * assomption from the C code if we are interrupted 4019 * inside, so we reset if this happens. Btw, since these 4020 * SCRIPTS sections are executed while the SCRIPTS hasn't 4021 * started SCSI operations, it is very unlikely to happen. 4022 * 4023 * All the driver data structures are supposed to be 4024 * allocated from the same 4 GB memory window, so there 4025 * is a 1 to 1 relationship between DSA and driver data 4026 * structures. Since we are careful :) to invalidate the 4027 * DSA when we complete a command or when the SCRIPTS 4028 * pushes a DSA into a queue, we can trust it when it 4029 * points to a CCB. 4030 */ 4031 static void sym_recover_scsi_int (hcb_p np, u_char hsts) 4032 { 4033 u32 dsp = INL (nc_dsp); 4034 u32 dsa = INL (nc_dsa); 4035 ccb_p cp = sym_ccb_from_dsa(np, dsa); 4036 4037 /* 4038 * If we haven't been interrupted inside the SCRIPTS 4039 * critical pathes, we can safely restart the SCRIPTS 4040 * and trust the DSA value if it matches a CCB. 4041 */ 4042 if ((!(dsp > SCRIPTA_BA (np, getjob_begin) && 4043 dsp < SCRIPTA_BA (np, getjob_end) + 1)) && 4044 (!(dsp > SCRIPTA_BA (np, ungetjob) && 4045 dsp < SCRIPTA_BA (np, reselect) + 1)) && 4046 (!(dsp > SCRIPTB_BA (np, sel_for_abort) && 4047 dsp < SCRIPTB_BA (np, sel_for_abort_1) + 1)) && 4048 (!(dsp > SCRIPTA_BA (np, done) && 4049 dsp < SCRIPTA_BA (np, done_end) + 1))) { 4050 OUTB (nc_ctest3, np->rv_ctest3 | CLF); /* clear dma fifo */ 4051 OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */ 4052 /* 4053 * If we have a CCB, let the SCRIPTS call us back for 4054 * the handling of the error with SCRATCHA filled with 4055 * STARTPOS. This way, we will be able to freeze the 4056 * device queue and requeue awaiting IOs. 4057 */ 4058 if (cp) { 4059 cp->host_status = hsts; 4060 OUTL_DSP (SCRIPTA_BA (np, complete_error)); 4061 } 4062 /* 4063 * Otherwise just restart the SCRIPTS. 4064 */ 4065 else { 4066 OUTL (nc_dsa, 0xffffff); 4067 OUTL_DSP (SCRIPTA_BA (np, start)); 4068 } 4069 } 4070 else 4071 goto reset_all; 4072 4073 return; 4074 4075 reset_all: 4076 sym_start_reset(np); 4077 } 4078 4079 /* 4080 * chip exception handler for selection timeout 4081 */ 4082 static void sym_int_sto (hcb_p np) 4083 { 4084 u32 dsp = INL (nc_dsp); 4085 4086 if (DEBUG_FLAGS & DEBUG_TINY) kprintf ("T"); 4087 4088 if (dsp == SCRIPTA_BA (np, wf_sel_done) + 8) 4089 sym_recover_scsi_int(np, HS_SEL_TIMEOUT); 4090 else 4091 sym_start_reset(np); 4092 } 4093 4094 /* 4095 * chip exception handler for unexpected disconnect 4096 */ 4097 static void sym_int_udc (hcb_p np) 4098 { 4099 kprintf ("%s: unexpected disconnect\n", sym_name(np)); 4100 sym_recover_scsi_int(np, HS_UNEXPECTED); 4101 } 4102 4103 /* 4104 * chip exception handler for SCSI bus mode change 4105 * 4106 * spi2-r12 11.2.3 says a transceiver mode change must 4107 * generate a reset event and a device that detects a reset 4108 * event shall initiate a hard reset. It says also that a 4109 * device that detects a mode change shall set data transfer 4110 * mode to eight bit asynchronous, etc... 4111 * So, just reinitializing all except chip should be enough. 4112 */ 4113 static void sym_int_sbmc (hcb_p np) 4114 { 4115 u_char scsi_mode = INB (nc_stest4) & SMODE; 4116 4117 /* 4118 * Notify user. 4119 */ 4120 xpt_print_path(np->path); 4121 kprintf("SCSI BUS mode change from %s to %s.\n", 4122 sym_scsi_bus_mode(np->scsi_mode), sym_scsi_bus_mode(scsi_mode)); 4123 4124 /* 4125 * Should suspend command processing for a few seconds and 4126 * reinitialize all except the chip. 4127 */ 4128 sym_init (np, 2); 4129 } 4130 4131 /* 4132 * chip exception handler for SCSI parity error. 4133 * 4134 * When the chip detects a SCSI parity error and is 4135 * currently executing a (CH)MOV instruction, it does 4136 * not interrupt immediately, but tries to finish the 4137 * transfer of the current scatter entry before 4138 * interrupting. The following situations may occur: 4139 * 4140 * - The complete scatter entry has been transferred 4141 * without the device having changed phase. 4142 * The chip will then interrupt with the DSP pointing 4143 * to the instruction that follows the MOV. 4144 * 4145 * - A phase mismatch occurs before the MOV finished 4146 * and phase errors are to be handled by the C code. 4147 * The chip will then interrupt with both PAR and MA 4148 * conditions set. 4149 * 4150 * - A phase mismatch occurs before the MOV finished and 4151 * phase errors are to be handled by SCRIPTS. 4152 * The chip will load the DSP with the phase mismatch 4153 * JUMP address and interrupt the host processor. 4154 */ 4155 static void sym_int_par (hcb_p np, u_short sist) 4156 { 4157 u_char hsts = INB (HS_PRT); 4158 u32 dsp = INL (nc_dsp); 4159 u32 dbc = INL (nc_dbc); 4160 u32 dsa = INL (nc_dsa); 4161 u_char sbcl = INB (nc_sbcl); 4162 u_char cmd = dbc >> 24; 4163 int phase = cmd & 7; 4164 ccb_p cp = sym_ccb_from_dsa(np, dsa); 4165 4166 kprintf("%s: SCSI parity error detected: SCR1=%d DBC=%x SBCL=%x\n", 4167 sym_name(np), hsts, dbc, sbcl); 4168 4169 /* 4170 * Check that the chip is connected to the SCSI BUS. 4171 */ 4172 if (!(INB (nc_scntl1) & ISCON)) { 4173 sym_recover_scsi_int(np, HS_UNEXPECTED); 4174 return; 4175 } 4176 4177 /* 4178 * If the nexus is not clearly identified, reset the bus. 4179 * We will try to do better later. 4180 */ 4181 if (!cp) 4182 goto reset_all; 4183 4184 /* 4185 * Check instruction was a MOV, direction was INPUT and 4186 * ATN is asserted. 4187 */ 4188 if ((cmd & 0xc0) || !(phase & 1) || !(sbcl & 0x8)) 4189 goto reset_all; 4190 4191 /* 4192 * Keep track of the parity error. 4193 */ 4194 OUTONB (HF_PRT, HF_EXT_ERR); 4195 cp->xerr_status |= XE_PARITY_ERR; 4196 4197 /* 4198 * Prepare the message to send to the device. 4199 */ 4200 np->msgout[0] = (phase == 7) ? M_PARITY : M_ID_ERROR; 4201 4202 /* 4203 * If the old phase was DATA IN phase, we have to deal with 4204 * the 3 situations described above. 4205 * For other input phases (MSG IN and STATUS), the device 4206 * must resend the whole thing that failed parity checking 4207 * or signal error. So, jumping to dispatcher should be OK. 4208 */ 4209 if (phase == 1 || phase == 5) { 4210 /* Phase mismatch handled by SCRIPTS */ 4211 if (dsp == SCRIPTB_BA (np, pm_handle)) 4212 OUTL_DSP (dsp); 4213 /* Phase mismatch handled by the C code */ 4214 else if (sist & MA) 4215 sym_int_ma (np); 4216 /* No phase mismatch occurred */ 4217 else { 4218 OUTL (nc_temp, dsp); 4219 OUTL_DSP (SCRIPTA_BA (np, dispatch)); 4220 } 4221 } 4222 else 4223 OUTL_DSP (SCRIPTA_BA (np, clrack)); 4224 return; 4225 4226 reset_all: 4227 sym_start_reset(np); 4228 } 4229 4230 /* 4231 * chip exception handler for phase errors. 4232 * 4233 * We have to construct a new transfer descriptor, 4234 * to transfer the rest of the current block. 4235 */ 4236 static void sym_int_ma (hcb_p np) 4237 { 4238 u32 dbc; 4239 u32 rest; 4240 u32 dsp; 4241 u32 dsa; 4242 u32 nxtdsp; 4243 u32 *vdsp; 4244 u32 oadr, olen; 4245 u32 *tblp; 4246 u32 newcmd; 4247 u_int delta; 4248 u_char cmd; 4249 u_char hflags, hflags0; 4250 struct sym_pmc *pm; 4251 ccb_p cp; 4252 4253 dsp = INL (nc_dsp); 4254 dbc = INL (nc_dbc); 4255 dsa = INL (nc_dsa); 4256 4257 cmd = dbc >> 24; 4258 rest = dbc & 0xffffff; 4259 delta = 0; 4260 4261 /* 4262 * locate matching cp if any. 4263 */ 4264 cp = sym_ccb_from_dsa(np, dsa); 4265 4266 /* 4267 * Donnot take into account dma fifo and various buffers in 4268 * INPUT phase since the chip flushes everything before 4269 * raising the MA interrupt for interrupted INPUT phases. 4270 * For DATA IN phase, we will check for the SWIDE later. 4271 */ 4272 if ((cmd & 7) != 1 && (cmd & 7) != 5) { 4273 u_char ss0, ss2; 4274 4275 if (np->features & FE_DFBC) 4276 delta = INW (nc_dfbc); 4277 else { 4278 u32 dfifo; 4279 4280 /* 4281 * Read DFIFO, CTEST[4-6] using 1 PCI bus ownership. 4282 */ 4283 dfifo = INL(nc_dfifo); 4284 4285 /* 4286 * Calculate remaining bytes in DMA fifo. 4287 * (CTEST5 = dfifo >> 16) 4288 */ 4289 if (dfifo & (DFS << 16)) 4290 delta = ((((dfifo >> 8) & 0x300) | 4291 (dfifo & 0xff)) - rest) & 0x3ff; 4292 else 4293 delta = ((dfifo & 0xff) - rest) & 0x7f; 4294 } 4295 4296 /* 4297 * The data in the dma fifo has not been transferred to 4298 * the target -> add the amount to the rest 4299 * and clear the data. 4300 * Check the sstat2 register in case of wide transfer. 4301 */ 4302 rest += delta; 4303 ss0 = INB (nc_sstat0); 4304 if (ss0 & OLF) rest++; 4305 if (!(np->features & FE_C10)) 4306 if (ss0 & ORF) rest++; 4307 if (cp && (cp->phys.select.sel_scntl3 & EWS)) { 4308 ss2 = INB (nc_sstat2); 4309 if (ss2 & OLF1) rest++; 4310 if (!(np->features & FE_C10)) 4311 if (ss2 & ORF1) rest++; 4312 } 4313 4314 /* 4315 * Clear fifos. 4316 */ 4317 OUTB (nc_ctest3, np->rv_ctest3 | CLF); /* dma fifo */ 4318 OUTB (nc_stest3, TE|CSF); /* scsi fifo */ 4319 } 4320 4321 /* 4322 * log the information 4323 */ 4324 if (DEBUG_FLAGS & (DEBUG_TINY|DEBUG_PHASE)) 4325 kprintf ("P%x%x RL=%d D=%d ", cmd&7, INB(nc_sbcl)&7, 4326 (unsigned) rest, (unsigned) delta); 4327 4328 /* 4329 * try to find the interrupted script command, 4330 * and the address at which to continue. 4331 */ 4332 vdsp = NULL; 4333 nxtdsp = 0; 4334 if (dsp > np->scripta_ba && 4335 dsp <= np->scripta_ba + np->scripta_sz) { 4336 vdsp = (u32 *)((char*)np->scripta0 + (dsp-np->scripta_ba-8)); 4337 nxtdsp = dsp; 4338 } 4339 else if (dsp > np->scriptb_ba && 4340 dsp <= np->scriptb_ba + np->scriptb_sz) { 4341 vdsp = (u32 *)((char*)np->scriptb0 + (dsp-np->scriptb_ba-8)); 4342 nxtdsp = dsp; 4343 } 4344 4345 /* 4346 * log the information 4347 */ 4348 if (DEBUG_FLAGS & DEBUG_PHASE) { 4349 kprintf ("\nCP=%p DSP=%x NXT=%x VDSP=%p CMD=%x ", 4350 cp, (unsigned)dsp, (unsigned)nxtdsp, vdsp, cmd); 4351 } 4352 4353 if (!vdsp) { 4354 kprintf ("%s: interrupted SCRIPT address not found.\n", 4355 sym_name (np)); 4356 goto reset_all; 4357 } 4358 4359 if (!cp) { 4360 kprintf ("%s: SCSI phase error fixup: CCB already dequeued.\n", 4361 sym_name (np)); 4362 goto reset_all; 4363 } 4364 4365 /* 4366 * get old startaddress and old length. 4367 */ 4368 oadr = scr_to_cpu(vdsp[1]); 4369 4370 if (cmd & 0x10) { /* Table indirect */ 4371 tblp = (u32 *) ((char*) &cp->phys + oadr); 4372 olen = scr_to_cpu(tblp[0]); 4373 oadr = scr_to_cpu(tblp[1]); 4374 } else { 4375 tblp = NULL; 4376 olen = scr_to_cpu(vdsp[0]) & 0xffffff; 4377 } 4378 4379 if (DEBUG_FLAGS & DEBUG_PHASE) { 4380 kprintf ("OCMD=%x\nTBLP=%p OLEN=%x OADR=%x\n", 4381 (unsigned) (scr_to_cpu(vdsp[0]) >> 24), 4382 tblp, 4383 (unsigned) olen, 4384 (unsigned) oadr); 4385 } 4386 4387 /* 4388 * check cmd against assumed interrupted script command. 4389 * If dt data phase, the MOVE instruction hasn't bit 4 of 4390 * the phase. 4391 */ 4392 if (((cmd & 2) ? cmd : (cmd & ~4)) != (scr_to_cpu(vdsp[0]) >> 24)) { 4393 PRINT_ADDR(cp); 4394 kprintf ("internal error: cmd=%02x != %02x=(vdsp[0] >> 24)\n", 4395 (unsigned)cmd, (unsigned)scr_to_cpu(vdsp[0]) >> 24); 4396 4397 goto reset_all; 4398 } 4399 4400 /* 4401 * if old phase not dataphase, leave here. 4402 */ 4403 if (cmd & 2) { 4404 PRINT_ADDR(cp); 4405 kprintf ("phase change %x-%x %d@%08x resid=%d.\n", 4406 cmd&7, INB(nc_sbcl)&7, (unsigned)olen, 4407 (unsigned)oadr, (unsigned)rest); 4408 goto unexpected_phase; 4409 } 4410 4411 /* 4412 * Choose the correct PM save area. 4413 * 4414 * Look at the PM_SAVE SCRIPT if you want to understand 4415 * this stuff. The equivalent code is implemented in 4416 * SCRIPTS for the 895A, 896 and 1010 that are able to 4417 * handle PM from the SCRIPTS processor. 4418 */ 4419 hflags0 = INB (HF_PRT); 4420 hflags = hflags0; 4421 4422 if (hflags & (HF_IN_PM0 | HF_IN_PM1 | HF_DP_SAVED)) { 4423 if (hflags & HF_IN_PM0) 4424 nxtdsp = scr_to_cpu(cp->phys.pm0.ret); 4425 else if (hflags & HF_IN_PM1) 4426 nxtdsp = scr_to_cpu(cp->phys.pm1.ret); 4427 4428 if (hflags & HF_DP_SAVED) 4429 hflags ^= HF_ACT_PM; 4430 } 4431 4432 if (!(hflags & HF_ACT_PM)) { 4433 pm = &cp->phys.pm0; 4434 newcmd = SCRIPTA_BA (np, pm0_data); 4435 } 4436 else { 4437 pm = &cp->phys.pm1; 4438 newcmd = SCRIPTA_BA (np, pm1_data); 4439 } 4440 4441 hflags &= ~(HF_IN_PM0 | HF_IN_PM1 | HF_DP_SAVED); 4442 if (hflags != hflags0) 4443 OUTB (HF_PRT, hflags); 4444 4445 /* 4446 * fillin the phase mismatch context 4447 */ 4448 pm->sg.addr = cpu_to_scr(oadr + olen - rest); 4449 pm->sg.size = cpu_to_scr(rest); 4450 pm->ret = cpu_to_scr(nxtdsp); 4451 4452 /* 4453 * If we have a SWIDE, 4454 * - prepare the address to write the SWIDE from SCRIPTS, 4455 * - compute the SCRIPTS address to restart from, 4456 * - move current data pointer context by one byte. 4457 */ 4458 nxtdsp = SCRIPTA_BA (np, dispatch); 4459 if ((cmd & 7) == 1 && cp && (cp->phys.select.sel_scntl3 & EWS) && 4460 (INB (nc_scntl2) & WSR)) { 4461 u32 tmp; 4462 4463 /* 4464 * Set up the table indirect for the MOVE 4465 * of the residual byte and adjust the data 4466 * pointer context. 4467 */ 4468 tmp = scr_to_cpu(pm->sg.addr); 4469 cp->phys.wresid.addr = cpu_to_scr(tmp); 4470 pm->sg.addr = cpu_to_scr(tmp + 1); 4471 tmp = scr_to_cpu(pm->sg.size); 4472 cp->phys.wresid.size = cpu_to_scr((tmp&0xff000000) | 1); 4473 pm->sg.size = cpu_to_scr(tmp - 1); 4474 4475 /* 4476 * If only the residual byte is to be moved, 4477 * no PM context is needed. 4478 */ 4479 if ((tmp&0xffffff) == 1) 4480 newcmd = pm->ret; 4481 4482 /* 4483 * Prepare the address of SCRIPTS that will 4484 * move the residual byte to memory. 4485 */ 4486 nxtdsp = SCRIPTB_BA (np, wsr_ma_helper); 4487 } 4488 4489 if (DEBUG_FLAGS & DEBUG_PHASE) { 4490 PRINT_ADDR(cp); 4491 kprintf ("PM %x %x %x / %x %x %x.\n", 4492 hflags0, hflags, newcmd, 4493 (unsigned)scr_to_cpu(pm->sg.addr), 4494 (unsigned)scr_to_cpu(pm->sg.size), 4495 (unsigned)scr_to_cpu(pm->ret)); 4496 } 4497 4498 /* 4499 * Restart the SCRIPTS processor. 4500 */ 4501 OUTL (nc_temp, newcmd); 4502 OUTL_DSP (nxtdsp); 4503 return; 4504 4505 /* 4506 * Unexpected phase changes that occurs when the current phase 4507 * is not a DATA IN or DATA OUT phase are due to error conditions. 4508 * Such event may only happen when the SCRIPTS is using a 4509 * multibyte SCSI MOVE. 4510 * 4511 * Phase change Some possible cause 4512 * 4513 * COMMAND --> MSG IN SCSI parity error detected by target. 4514 * COMMAND --> STATUS Bad command or refused by target. 4515 * MSG OUT --> MSG IN Message rejected by target. 4516 * MSG OUT --> COMMAND Bogus target that discards extended 4517 * negotiation messages. 4518 * 4519 * The code below does not care of the new phase and so 4520 * trusts the target. Why to annoy it ? 4521 * If the interrupted phase is COMMAND phase, we restart at 4522 * dispatcher. 4523 * If a target does not get all the messages after selection, 4524 * the code assumes blindly that the target discards extended 4525 * messages and clears the negotiation status. 4526 * If the target does not want all our response to negotiation, 4527 * we force a SIR_NEGO_PROTO interrupt (it is a hack that avoids 4528 * bloat for such a should_not_happen situation). 4529 * In all other situation, we reset the BUS. 4530 * Are these assumptions reasonnable ? (Wait and see ...) 4531 */ 4532 unexpected_phase: 4533 dsp -= 8; 4534 nxtdsp = 0; 4535 4536 switch (cmd & 7) { 4537 case 2: /* COMMAND phase */ 4538 nxtdsp = SCRIPTA_BA (np, dispatch); 4539 break; 4540 #if 0 4541 case 3: /* STATUS phase */ 4542 nxtdsp = SCRIPTA_BA (np, dispatch); 4543 break; 4544 #endif 4545 case 6: /* MSG OUT phase */ 4546 /* 4547 * If the device may want to use untagged when we want 4548 * tagged, we prepare an IDENTIFY without disc. granted, 4549 * since we will not be able to handle reselect. 4550 * Otherwise, we just don't care. 4551 */ 4552 if (dsp == SCRIPTA_BA (np, send_ident)) { 4553 if (cp->tag != NO_TAG && olen - rest <= 3) { 4554 cp->host_status = HS_BUSY; 4555 np->msgout[0] = M_IDENTIFY | cp->lun; 4556 nxtdsp = SCRIPTB_BA (np, ident_break_atn); 4557 } 4558 else 4559 nxtdsp = SCRIPTB_BA (np, ident_break); 4560 } 4561 else if (dsp == SCRIPTB_BA (np, send_wdtr) || 4562 dsp == SCRIPTB_BA (np, send_sdtr) || 4563 dsp == SCRIPTB_BA (np, send_ppr)) { 4564 nxtdsp = SCRIPTB_BA (np, nego_bad_phase); 4565 } 4566 break; 4567 #if 0 4568 case 7: /* MSG IN phase */ 4569 nxtdsp = SCRIPTA_BA (np, clrack); 4570 break; 4571 #endif 4572 } 4573 4574 if (nxtdsp) { 4575 OUTL_DSP (nxtdsp); 4576 return; 4577 } 4578 4579 reset_all: 4580 sym_start_reset(np); 4581 } 4582 4583 /* 4584 * Dequeue from the START queue all CCBs that match 4585 * a given target/lun/task condition (-1 means all), 4586 * and move them from the BUSY queue to the COMP queue 4587 * with CAM_REQUEUE_REQ status condition. 4588 * This function is used during error handling/recovery. 4589 * It is called with SCRIPTS not running. 4590 */ 4591 static int 4592 sym_dequeue_from_squeue(hcb_p np, int i, int target, int lun, int task) 4593 { 4594 int j; 4595 ccb_p cp; 4596 4597 /* 4598 * Make sure the starting index is within range. 4599 */ 4600 assert((i >= 0) && (i < 2*MAX_QUEUE)); 4601 4602 /* 4603 * Walk until end of START queue and dequeue every job 4604 * that matches the target/lun/task condition. 4605 */ 4606 j = i; 4607 while (i != np->squeueput) { 4608 cp = sym_ccb_from_dsa(np, scr_to_cpu(np->squeue[i])); 4609 assert(cp); 4610 #ifdef SYM_CONF_IARB_SUPPORT 4611 /* Forget hints for IARB, they may be no longer relevant */ 4612 cp->host_flags &= ~HF_HINT_IARB; 4613 #endif 4614 if ((target == -1 || cp->target == target) && 4615 (lun == -1 || cp->lun == lun) && 4616 (task == -1 || cp->tag == task)) { 4617 sym_set_cam_status(cp->cam_ccb, CAM_REQUEUE_REQ); 4618 sym_remque(&cp->link_ccbq); 4619 sym_insque_tail(&cp->link_ccbq, &np->comp_ccbq); 4620 } 4621 else { 4622 if (i != j) 4623 np->squeue[j] = np->squeue[i]; 4624 if ((j += 2) >= MAX_QUEUE*2) j = 0; 4625 } 4626 if ((i += 2) >= MAX_QUEUE*2) i = 0; 4627 } 4628 if (i != j) /* Copy back the idle task if needed */ 4629 np->squeue[j] = np->squeue[i]; 4630 np->squeueput = j; /* Update our current start queue pointer */ 4631 4632 return (i - j) / 2; 4633 } 4634 4635 /* 4636 * Complete all CCBs queued to the COMP queue. 4637 * 4638 * These CCBs are assumed: 4639 * - Not to be referenced either by devices or 4640 * SCRIPTS-related queues and datas. 4641 * - To have to be completed with an error condition 4642 * or requeued. 4643 * 4644 * The device queue freeze count is incremented 4645 * for each CCB that does not prevent this. 4646 * This function is called when all CCBs involved 4647 * in error handling/recovery have been reaped. 4648 */ 4649 static void 4650 sym_flush_comp_queue(hcb_p np, int cam_status) 4651 { 4652 SYM_QUEHEAD *qp; 4653 ccb_p cp; 4654 4655 while ((qp = sym_remque_head(&np->comp_ccbq)) != NULL) { 4656 union ccb *ccb; 4657 cp = sym_que_entry(qp, struct sym_ccb, link_ccbq); 4658 sym_insque_tail(&cp->link_ccbq, &np->busy_ccbq); 4659 /* Leave quiet CCBs waiting for resources */ 4660 if (cp->host_status == HS_WAIT) 4661 continue; 4662 ccb = cp->cam_ccb; 4663 if (cam_status) 4664 sym_set_cam_status(ccb, cam_status); 4665 sym_freeze_cam_ccb(ccb); 4666 sym_xpt_done(np, ccb, cp); 4667 sym_free_ccb(np, cp); 4668 } 4669 } 4670 4671 /* 4672 * chip handler for bad SCSI status condition 4673 * 4674 * In case of bad SCSI status, we unqueue all the tasks 4675 * currently queued to the controller but not yet started 4676 * and then restart the SCRIPTS processor immediately. 4677 * 4678 * QUEUE FULL and BUSY conditions are handled the same way. 4679 * Basically all the not yet started tasks are requeued in 4680 * device queue and the queue is frozen until a completion. 4681 * 4682 * For CHECK CONDITION and COMMAND TERMINATED status, we use 4683 * the CCB of the failed command to prepare a REQUEST SENSE 4684 * SCSI command and queue it to the controller queue. 4685 * 4686 * SCRATCHA is assumed to have been loaded with STARTPOS 4687 * before the SCRIPTS called the C code. 4688 */ 4689 static void sym_sir_bad_scsi_status(hcb_p np, int num, ccb_p cp) 4690 { 4691 tcb_p tp = &np->target[cp->target]; 4692 u32 startp; 4693 u_char s_status = cp->ssss_status; 4694 u_char h_flags = cp->host_flags; 4695 int msglen; 4696 int nego; 4697 int i; 4698 4699 SYM_LOCK_ASSERT(LK_EXCLUSIVE); 4700 4701 /* 4702 * Compute the index of the next job to start from SCRIPTS. 4703 */ 4704 i = (INL (nc_scratcha) - np->squeue_ba) / 4; 4705 4706 /* 4707 * The last CCB queued used for IARB hint may be 4708 * no longer relevant. Forget it. 4709 */ 4710 #ifdef SYM_CONF_IARB_SUPPORT 4711 if (np->last_cp) 4712 np->last_cp = NULL; 4713 #endif 4714 4715 /* 4716 * Now deal with the SCSI status. 4717 */ 4718 switch(s_status) { 4719 case S_BUSY: 4720 case S_QUEUE_FULL: 4721 if (sym_verbose >= 2) { 4722 PRINT_ADDR(cp); 4723 kprintf (s_status == S_BUSY ? "BUSY" : "QUEUE FULL\n"); 4724 } 4725 default: /* S_INT, S_INT_COND_MET, S_CONFLICT */ 4726 sym_complete_error (np, cp); 4727 break; 4728 case S_TERMINATED: 4729 case S_CHECK_COND: 4730 /* 4731 * If we get an SCSI error when requesting sense, give up. 4732 */ 4733 if (h_flags & HF_SENSE) { 4734 sym_complete_error (np, cp); 4735 break; 4736 } 4737 4738 /* 4739 * Dequeue all queued CCBs for that device not yet started, 4740 * and restart the SCRIPTS processor immediately. 4741 */ 4742 (void) sym_dequeue_from_squeue(np, i, cp->target, cp->lun, -1); 4743 OUTL_DSP (SCRIPTA_BA (np, start)); 4744 4745 /* 4746 * Save some info of the actual IO. 4747 * Compute the data residual. 4748 */ 4749 cp->sv_scsi_status = cp->ssss_status; 4750 cp->sv_xerr_status = cp->xerr_status; 4751 cp->sv_resid = sym_compute_residual(np, cp); 4752 4753 /* 4754 * Prepare all needed data structures for 4755 * requesting sense data. 4756 */ 4757 4758 /* 4759 * identify message 4760 */ 4761 cp->scsi_smsg2[0] = M_IDENTIFY | cp->lun; 4762 msglen = 1; 4763 4764 /* 4765 * If we are currently using anything different from 4766 * async. 8 bit data transfers with that target, 4767 * start a negotiation, since the device may want 4768 * to report us a UNIT ATTENTION condition due to 4769 * a cause we currently ignore, and we donnot want 4770 * to be stuck with WIDE and/or SYNC data transfer. 4771 * 4772 * cp->nego_status is filled by sym_prepare_nego(). 4773 */ 4774 cp->nego_status = 0; 4775 nego = 0; 4776 if (tp->tinfo.current.options & PPR_OPT_MASK) 4777 nego = NS_PPR; 4778 else if (tp->tinfo.current.width != BUS_8_BIT) 4779 nego = NS_WIDE; 4780 else if (tp->tinfo.current.offset != 0) 4781 nego = NS_SYNC; 4782 if (nego) 4783 msglen += 4784 sym_prepare_nego (np,cp, nego, &cp->scsi_smsg2[msglen]); 4785 /* 4786 * Message table indirect structure. 4787 */ 4788 cp->phys.smsg.addr = cpu_to_scr(CCB_BA (cp, scsi_smsg2)); 4789 cp->phys.smsg.size = cpu_to_scr(msglen); 4790 4791 /* 4792 * sense command 4793 */ 4794 cp->phys.cmd.addr = cpu_to_scr(CCB_BA (cp, sensecmd)); 4795 cp->phys.cmd.size = cpu_to_scr(6); 4796 4797 /* 4798 * patch requested size into sense command 4799 */ 4800 cp->sensecmd[0] = 0x03; 4801 cp->sensecmd[1] = cp->lun << 5; 4802 if (tp->tinfo.current.scsi_version > 2 || cp->lun > 7) 4803 cp->sensecmd[1] = 0; 4804 cp->sensecmd[4] = SYM_SNS_BBUF_LEN; 4805 cp->data_len = SYM_SNS_BBUF_LEN; 4806 4807 /* 4808 * sense data 4809 */ 4810 bzero(cp->sns_bbuf, SYM_SNS_BBUF_LEN); 4811 cp->phys.sense.addr = cpu_to_scr(vtobus(cp->sns_bbuf)); 4812 cp->phys.sense.size = cpu_to_scr(SYM_SNS_BBUF_LEN); 4813 4814 /* 4815 * requeue the command. 4816 */ 4817 startp = SCRIPTB_BA (np, sdata_in); 4818 4819 cp->phys.head.savep = cpu_to_scr(startp); 4820 cp->phys.head.goalp = cpu_to_scr(startp + 16); 4821 cp->phys.head.lastp = cpu_to_scr(startp); 4822 cp->startp = cpu_to_scr(startp); 4823 4824 cp->actualquirks = SYM_QUIRK_AUTOSAVE; 4825 cp->host_status = cp->nego_status ? HS_NEGOTIATE : HS_BUSY; 4826 cp->ssss_status = S_ILLEGAL; 4827 cp->host_flags = (HF_SENSE|HF_DATA_IN); 4828 cp->xerr_status = 0; 4829 cp->extra_bytes = 0; 4830 4831 cp->phys.head.go.start = cpu_to_scr(SCRIPTA_BA (np, select)); 4832 4833 /* 4834 * Requeue the command. 4835 */ 4836 sym_put_start_queue(np, cp); 4837 4838 /* 4839 * Give back to upper layer everything we have dequeued. 4840 */ 4841 sym_flush_comp_queue(np, 0); 4842 break; 4843 } 4844 } 4845 4846 /* 4847 * After a device has accepted some management message 4848 * as BUS DEVICE RESET, ABORT TASK, etc ..., or when 4849 * a device signals a UNIT ATTENTION condition, some 4850 * tasks are thrown away by the device. We are required 4851 * to reflect that on our tasks list since the device 4852 * will never complete these tasks. 4853 * 4854 * This function move from the BUSY queue to the COMP 4855 * queue all disconnected CCBs for a given target that 4856 * match the following criteria: 4857 * - lun=-1 means any logical UNIT otherwise a given one. 4858 * - task=-1 means any task, otherwise a given one. 4859 */ 4860 static int 4861 sym_clear_tasks(hcb_p np, int cam_status, int target, int lun, int task) 4862 { 4863 SYM_QUEHEAD qtmp, *qp; 4864 int i = 0; 4865 ccb_p cp; 4866 4867 /* 4868 * Move the entire BUSY queue to our temporary queue. 4869 */ 4870 sym_que_init(&qtmp); 4871 sym_que_splice(&np->busy_ccbq, &qtmp); 4872 sym_que_init(&np->busy_ccbq); 4873 4874 /* 4875 * Put all CCBs that matches our criteria into 4876 * the COMP queue and put back other ones into 4877 * the BUSY queue. 4878 */ 4879 while ((qp = sym_remque_head(&qtmp)) != NULL) { 4880 union ccb *ccb; 4881 cp = sym_que_entry(qp, struct sym_ccb, link_ccbq); 4882 ccb = cp->cam_ccb; 4883 if (cp->host_status != HS_DISCONNECT || 4884 cp->target != target || 4885 (lun != -1 && cp->lun != lun) || 4886 (task != -1 && 4887 (cp->tag != NO_TAG && cp->scsi_smsg[2] != task))) { 4888 sym_insque_tail(&cp->link_ccbq, &np->busy_ccbq); 4889 continue; 4890 } 4891 sym_insque_tail(&cp->link_ccbq, &np->comp_ccbq); 4892 4893 /* Preserve the software timeout condition */ 4894 if (sym_get_cam_status(ccb) != CAM_CMD_TIMEOUT) 4895 sym_set_cam_status(ccb, cam_status); 4896 ++i; 4897 #if 0 4898 kprintf("XXXX TASK @%p CLEARED\n", cp); 4899 #endif 4900 } 4901 return i; 4902 } 4903 4904 /* 4905 * chip handler for TASKS recovery 4906 * 4907 * We cannot safely abort a command, while the SCRIPTS 4908 * processor is running, since we just would be in race 4909 * with it. 4910 * 4911 * As long as we have tasks to abort, we keep the SEM 4912 * bit set in the ISTAT. When this bit is set, the 4913 * SCRIPTS processor interrupts (SIR_SCRIPT_STOPPED) 4914 * each time it enters the scheduler. 4915 * 4916 * If we have to reset a target, clear tasks of a unit, 4917 * or to perform the abort of a disconnected job, we 4918 * restart the SCRIPTS for selecting the target. Once 4919 * selected, the SCRIPTS interrupts (SIR_TARGET_SELECTED). 4920 * If it loses arbitration, the SCRIPTS will interrupt again 4921 * the next time it will enter its scheduler, and so on ... 4922 * 4923 * On SIR_TARGET_SELECTED, we scan for the more 4924 * appropriate thing to do: 4925 * 4926 * - If nothing, we just sent a M_ABORT message to the 4927 * target to get rid of the useless SCSI bus ownership. 4928 * According to the specs, no tasks shall be affected. 4929 * - If the target is to be reset, we send it a M_RESET 4930 * message. 4931 * - If a logical UNIT is to be cleared , we send the 4932 * IDENTIFY(lun) + M_ABORT. 4933 * - If an untagged task is to be aborted, we send the 4934 * IDENTIFY(lun) + M_ABORT. 4935 * - If a tagged task is to be aborted, we send the 4936 * IDENTIFY(lun) + task attributes + M_ABORT_TAG. 4937 * 4938 * Once our 'kiss of death' :) message has been accepted 4939 * by the target, the SCRIPTS interrupts again 4940 * (SIR_ABORT_SENT). On this interrupt, we complete 4941 * all the CCBs that should have been aborted by the 4942 * target according to our message. 4943 */ 4944 static void sym_sir_task_recovery(hcb_p np, int num) 4945 { 4946 SYM_QUEHEAD *qp; 4947 ccb_p cp; 4948 tcb_p tp; 4949 int target=-1, lun=-1, task; 4950 int i, k; 4951 4952 switch(num) { 4953 /* 4954 * The SCRIPTS processor stopped before starting 4955 * the next command in order to allow us to perform 4956 * some task recovery. 4957 */ 4958 case SIR_SCRIPT_STOPPED: 4959 /* 4960 * Do we have any target to reset or unit to clear ? 4961 */ 4962 for (i = 0 ; i < SYM_CONF_MAX_TARGET ; i++) { 4963 tp = &np->target[i]; 4964 if (tp->to_reset || 4965 (tp->lun0p && tp->lun0p->to_clear)) { 4966 target = i; 4967 break; 4968 } 4969 if (!tp->lunmp) 4970 continue; 4971 for (k = 1 ; k < SYM_CONF_MAX_LUN ; k++) { 4972 if (tp->lunmp[k] && tp->lunmp[k]->to_clear) { 4973 target = i; 4974 break; 4975 } 4976 } 4977 if (target != -1) 4978 break; 4979 } 4980 4981 /* 4982 * If not, walk the busy queue for any 4983 * disconnected CCB to be aborted. 4984 */ 4985 if (target == -1) { 4986 FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) { 4987 cp = sym_que_entry(qp,struct sym_ccb,link_ccbq); 4988 if (cp->host_status != HS_DISCONNECT) 4989 continue; 4990 if (cp->to_abort) { 4991 target = cp->target; 4992 break; 4993 } 4994 } 4995 } 4996 4997 /* 4998 * If some target is to be selected, 4999 * prepare and start the selection. 5000 */ 5001 if (target != -1) { 5002 tp = &np->target[target]; 5003 np->abrt_sel.sel_id = target; 5004 np->abrt_sel.sel_scntl3 = tp->head.wval; 5005 np->abrt_sel.sel_sxfer = tp->head.sval; 5006 OUTL(nc_dsa, np->hcb_ba); 5007 OUTL_DSP (SCRIPTB_BA (np, sel_for_abort)); 5008 return; 5009 } 5010 5011 /* 5012 * Now look for a CCB to abort that haven't started yet. 5013 * Btw, the SCRIPTS processor is still stopped, so 5014 * we are not in race. 5015 */ 5016 i = 0; 5017 cp = NULL; 5018 FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) { 5019 cp = sym_que_entry(qp, struct sym_ccb, link_ccbq); 5020 if (cp->host_status != HS_BUSY && 5021 cp->host_status != HS_NEGOTIATE) 5022 continue; 5023 if (!cp->to_abort) 5024 continue; 5025 #ifdef SYM_CONF_IARB_SUPPORT 5026 /* 5027 * If we are using IMMEDIATE ARBITRATION, we donnot 5028 * want to cancel the last queued CCB, since the 5029 * SCRIPTS may have anticipated the selection. 5030 */ 5031 if (cp == np->last_cp) { 5032 cp->to_abort = 0; 5033 continue; 5034 } 5035 #endif 5036 i = 1; /* Means we have found some */ 5037 break; 5038 } 5039 if (!i) { 5040 /* 5041 * We are done, so we donnot need 5042 * to synchronize with the SCRIPTS anylonger. 5043 * Remove the SEM flag from the ISTAT. 5044 */ 5045 np->istat_sem = 0; 5046 OUTB (nc_istat, SIGP); 5047 break; 5048 } 5049 /* 5050 * Compute index of next position in the start 5051 * queue the SCRIPTS intends to start and dequeue 5052 * all CCBs for that device that haven't been started. 5053 */ 5054 i = (INL (nc_scratcha) - np->squeue_ba) / 4; 5055 i = sym_dequeue_from_squeue(np, i, cp->target, cp->lun, -1); 5056 5057 /* 5058 * Make sure at least our IO to abort has been dequeued. 5059 */ 5060 assert(i && sym_get_cam_status(cp->cam_ccb) == CAM_REQUEUE_REQ); 5061 5062 /* 5063 * Keep track in cam status of the reason of the abort. 5064 */ 5065 if (cp->to_abort == 2) 5066 sym_set_cam_status(cp->cam_ccb, CAM_CMD_TIMEOUT); 5067 else 5068 sym_set_cam_status(cp->cam_ccb, CAM_REQ_ABORTED); 5069 5070 /* 5071 * Complete with error everything that we have dequeued. 5072 */ 5073 sym_flush_comp_queue(np, 0); 5074 break; 5075 /* 5076 * The SCRIPTS processor has selected a target 5077 * we may have some manual recovery to perform for. 5078 */ 5079 case SIR_TARGET_SELECTED: 5080 target = (INB (nc_sdid) & 0xf); 5081 tp = &np->target[target]; 5082 5083 np->abrt_tbl.addr = cpu_to_scr(vtobus(np->abrt_msg)); 5084 5085 /* 5086 * If the target is to be reset, prepare a 5087 * M_RESET message and clear the to_reset flag 5088 * since we donnot expect this operation to fail. 5089 */ 5090 if (tp->to_reset) { 5091 np->abrt_msg[0] = M_RESET; 5092 np->abrt_tbl.size = 1; 5093 tp->to_reset = 0; 5094 break; 5095 } 5096 5097 /* 5098 * Otherwise, look for some logical unit to be cleared. 5099 */ 5100 if (tp->lun0p && tp->lun0p->to_clear) 5101 lun = 0; 5102 else if (tp->lunmp) { 5103 for (k = 1 ; k < SYM_CONF_MAX_LUN ; k++) { 5104 if (tp->lunmp[k] && tp->lunmp[k]->to_clear) { 5105 lun = k; 5106 break; 5107 } 5108 } 5109 } 5110 5111 /* 5112 * If a logical unit is to be cleared, prepare 5113 * an IDENTIFY(lun) + ABORT MESSAGE. 5114 */ 5115 if (lun != -1) { 5116 lcb_p lp = sym_lp(np, tp, lun); 5117 lp->to_clear = 0; /* We donnot expect to fail here */ 5118 np->abrt_msg[0] = M_IDENTIFY | lun; 5119 np->abrt_msg[1] = M_ABORT; 5120 np->abrt_tbl.size = 2; 5121 break; 5122 } 5123 5124 /* 5125 * Otherwise, look for some disconnected job to 5126 * abort for this target. 5127 */ 5128 i = 0; 5129 cp = NULL; 5130 FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) { 5131 cp = sym_que_entry(qp, struct sym_ccb, link_ccbq); 5132 if (cp->host_status != HS_DISCONNECT) 5133 continue; 5134 if (cp->target != target) 5135 continue; 5136 if (!cp->to_abort) 5137 continue; 5138 i = 1; /* Means we have some */ 5139 break; 5140 } 5141 5142 /* 5143 * If we have none, probably since the device has 5144 * completed the command before we won abitration, 5145 * send a M_ABORT message without IDENTIFY. 5146 * According to the specs, the device must just 5147 * disconnect the BUS and not abort any task. 5148 */ 5149 if (!i) { 5150 np->abrt_msg[0] = M_ABORT; 5151 np->abrt_tbl.size = 1; 5152 break; 5153 } 5154 5155 /* 5156 * We have some task to abort. 5157 * Set the IDENTIFY(lun) 5158 */ 5159 np->abrt_msg[0] = M_IDENTIFY | cp->lun; 5160 5161 /* 5162 * If we want to abort an untagged command, we 5163 * will send an IDENTIFY + M_ABORT. 5164 * Otherwise (tagged command), we will send 5165 * an IDENTIFY + task attributes + ABORT TAG. 5166 */ 5167 if (cp->tag == NO_TAG) { 5168 np->abrt_msg[1] = M_ABORT; 5169 np->abrt_tbl.size = 2; 5170 } 5171 else { 5172 np->abrt_msg[1] = cp->scsi_smsg[1]; 5173 np->abrt_msg[2] = cp->scsi_smsg[2]; 5174 np->abrt_msg[3] = M_ABORT_TAG; 5175 np->abrt_tbl.size = 4; 5176 } 5177 /* 5178 * Keep track of software timeout condition, since the 5179 * peripheral driver may not count retries on abort 5180 * conditions not due to timeout. 5181 */ 5182 if (cp->to_abort == 2) 5183 sym_set_cam_status(cp->cam_ccb, CAM_CMD_TIMEOUT); 5184 cp->to_abort = 0; /* We donnot expect to fail here */ 5185 break; 5186 5187 /* 5188 * The target has accepted our message and switched 5189 * to BUS FREE phase as we expected. 5190 */ 5191 case SIR_ABORT_SENT: 5192 target = (INB (nc_sdid) & 0xf); 5193 tp = &np->target[target]; 5194 5195 /* 5196 ** If we didn't abort anything, leave here. 5197 */ 5198 if (np->abrt_msg[0] == M_ABORT) 5199 break; 5200 5201 /* 5202 * If we sent a M_RESET, then a hardware reset has 5203 * been performed by the target. 5204 * - Reset everything to async 8 bit 5205 * - Tell ourself to negotiate next time :-) 5206 * - Prepare to clear all disconnected CCBs for 5207 * this target from our task list (lun=task=-1) 5208 */ 5209 lun = -1; 5210 task = -1; 5211 if (np->abrt_msg[0] == M_RESET) { 5212 tp->head.sval = 0; 5213 tp->head.wval = np->rv_scntl3; 5214 tp->head.uval = 0; 5215 tp->tinfo.current.period = 0; 5216 tp->tinfo.current.offset = 0; 5217 tp->tinfo.current.width = BUS_8_BIT; 5218 tp->tinfo.current.options = 0; 5219 } 5220 5221 /* 5222 * Otherwise, check for the LUN and TASK(s) 5223 * concerned by the cancelation. 5224 * If it is not ABORT_TAG then it is CLEAR_QUEUE 5225 * or an ABORT message :-) 5226 */ 5227 else { 5228 lun = np->abrt_msg[0] & 0x3f; 5229 if (np->abrt_msg[1] == M_ABORT_TAG) 5230 task = np->abrt_msg[2]; 5231 } 5232 5233 /* 5234 * Complete all the CCBs the device should have 5235 * aborted due to our 'kiss of death' message. 5236 */ 5237 i = (INL (nc_scratcha) - np->squeue_ba) / 4; 5238 (void) sym_dequeue_from_squeue(np, i, target, lun, -1); 5239 (void) sym_clear_tasks(np, CAM_REQ_ABORTED, target, lun, task); 5240 sym_flush_comp_queue(np, 0); 5241 5242 /* 5243 * If we sent a BDR, make uper layer aware of that. 5244 */ 5245 if (np->abrt_msg[0] == M_RESET) 5246 xpt_async(AC_SENT_BDR, np->path, NULL); 5247 break; 5248 } 5249 5250 /* 5251 * Print to the log the message we intend to send. 5252 */ 5253 if (num == SIR_TARGET_SELECTED) { 5254 PRINT_TARGET(np, target); 5255 sym_printl_hex("control msgout:", np->abrt_msg, 5256 np->abrt_tbl.size); 5257 np->abrt_tbl.size = cpu_to_scr(np->abrt_tbl.size); 5258 } 5259 5260 /* 5261 * Let the SCRIPTS processor continue. 5262 */ 5263 OUTONB_STD (); 5264 } 5265 5266 /* 5267 * Gerard's alchemy:) that deals with with the data 5268 * pointer for both MDP and the residual calculation. 5269 * 5270 * I didn't want to bloat the code by more than 200 5271 * lignes for the handling of both MDP and the residual. 5272 * This has been achieved by using a data pointer 5273 * representation consisting in an index in the data 5274 * array (dp_sg) and a negative offset (dp_ofs) that 5275 * have the following meaning: 5276 * 5277 * - dp_sg = SYM_CONF_MAX_SG 5278 * we are at the end of the data script. 5279 * - dp_sg < SYM_CONF_MAX_SG 5280 * dp_sg points to the next entry of the scatter array 5281 * we want to transfer. 5282 * - dp_ofs < 0 5283 * dp_ofs represents the residual of bytes of the 5284 * previous entry scatter entry we will send first. 5285 * - dp_ofs = 0 5286 * no residual to send first. 5287 * 5288 * The function sym_evaluate_dp() accepts an arbitray 5289 * offset (basically from the MDP message) and returns 5290 * the corresponding values of dp_sg and dp_ofs. 5291 */ 5292 5293 static int sym_evaluate_dp(hcb_p np, ccb_p cp, u32 scr, int *ofs) 5294 { 5295 u32 dp_scr; 5296 int dp_ofs, dp_sg, dp_sgmin; 5297 int tmp; 5298 struct sym_pmc *pm; 5299 5300 /* 5301 * Compute the resulted data pointer in term of a script 5302 * address within some DATA script and a signed byte offset. 5303 */ 5304 dp_scr = scr; 5305 dp_ofs = *ofs; 5306 if (dp_scr == SCRIPTA_BA (np, pm0_data)) 5307 pm = &cp->phys.pm0; 5308 else if (dp_scr == SCRIPTA_BA (np, pm1_data)) 5309 pm = &cp->phys.pm1; 5310 else 5311 pm = NULL; 5312 5313 if (pm) { 5314 dp_scr = scr_to_cpu(pm->ret); 5315 dp_ofs -= scr_to_cpu(pm->sg.size); 5316 } 5317 5318 /* 5319 * If we are auto-sensing, then we are done. 5320 */ 5321 if (cp->host_flags & HF_SENSE) { 5322 *ofs = dp_ofs; 5323 return 0; 5324 } 5325 5326 /* 5327 * Deduce the index of the sg entry. 5328 * Keep track of the index of the first valid entry. 5329 * If result is dp_sg = SYM_CONF_MAX_SG, then we are at the 5330 * end of the data. 5331 */ 5332 tmp = scr_to_cpu(cp->phys.head.goalp); 5333 dp_sg = SYM_CONF_MAX_SG; 5334 if (dp_scr != tmp) 5335 dp_sg -= (tmp - 8 - (int)dp_scr) / (2*4); 5336 dp_sgmin = SYM_CONF_MAX_SG - cp->segments; 5337 5338 /* 5339 * Move to the sg entry the data pointer belongs to. 5340 * 5341 * If we are inside the data area, we expect result to be: 5342 * 5343 * Either, 5344 * dp_ofs = 0 and dp_sg is the index of the sg entry 5345 * the data pointer belongs to (or the end of the data) 5346 * Or, 5347 * dp_ofs < 0 and dp_sg is the index of the sg entry 5348 * the data pointer belongs to + 1. 5349 */ 5350 if (dp_ofs < 0) { 5351 int n; 5352 while (dp_sg > dp_sgmin) { 5353 --dp_sg; 5354 tmp = scr_to_cpu(cp->phys.data[dp_sg].size); 5355 n = dp_ofs + (tmp & 0xffffff); 5356 if (n > 0) { 5357 ++dp_sg; 5358 break; 5359 } 5360 dp_ofs = n; 5361 } 5362 } 5363 else if (dp_ofs > 0) { 5364 while (dp_sg < SYM_CONF_MAX_SG) { 5365 tmp = scr_to_cpu(cp->phys.data[dp_sg].size); 5366 dp_ofs -= (tmp & 0xffffff); 5367 ++dp_sg; 5368 if (dp_ofs <= 0) 5369 break; 5370 } 5371 } 5372 5373 /* 5374 * Make sure the data pointer is inside the data area. 5375 * If not, return some error. 5376 */ 5377 if (dp_sg < dp_sgmin || (dp_sg == dp_sgmin && dp_ofs < 0)) 5378 goto out_err; 5379 else if (dp_sg > SYM_CONF_MAX_SG || 5380 (dp_sg == SYM_CONF_MAX_SG && dp_ofs > 0)) 5381 goto out_err; 5382 5383 /* 5384 * Save the extreme pointer if needed. 5385 */ 5386 if (dp_sg > cp->ext_sg || 5387 (dp_sg == cp->ext_sg && dp_ofs > cp->ext_ofs)) { 5388 cp->ext_sg = dp_sg; 5389 cp->ext_ofs = dp_ofs; 5390 } 5391 5392 /* 5393 * Return data. 5394 */ 5395 *ofs = dp_ofs; 5396 return dp_sg; 5397 5398 out_err: 5399 return -1; 5400 } 5401 5402 /* 5403 * chip handler for MODIFY DATA POINTER MESSAGE 5404 * 5405 * We also call this function on IGNORE WIDE RESIDUE 5406 * messages that do not match a SWIDE full condition. 5407 * Btw, we assume in that situation that such a message 5408 * is equivalent to a MODIFY DATA POINTER (offset=-1). 5409 */ 5410 5411 static void sym_modify_dp(hcb_p np, tcb_p tp, ccb_p cp, int ofs) 5412 { 5413 int dp_ofs = ofs; 5414 u32 dp_scr = INL (nc_temp); 5415 u32 dp_ret; 5416 u32 tmp; 5417 u_char hflags; 5418 int dp_sg; 5419 struct sym_pmc *pm; 5420 5421 /* 5422 * Not supported for auto-sense. 5423 */ 5424 if (cp->host_flags & HF_SENSE) 5425 goto out_reject; 5426 5427 /* 5428 * Apply our alchemy:) (see comments in sym_evaluate_dp()), 5429 * to the resulted data pointer. 5430 */ 5431 dp_sg = sym_evaluate_dp(np, cp, dp_scr, &dp_ofs); 5432 if (dp_sg < 0) 5433 goto out_reject; 5434 5435 /* 5436 * And our alchemy:) allows to easily calculate the data 5437 * script address we want to return for the next data phase. 5438 */ 5439 dp_ret = cpu_to_scr(cp->phys.head.goalp); 5440 dp_ret = dp_ret - 8 - (SYM_CONF_MAX_SG - dp_sg) * (2*4); 5441 5442 /* 5443 * If offset / scatter entry is zero we donnot need 5444 * a context for the new current data pointer. 5445 */ 5446 if (dp_ofs == 0) { 5447 dp_scr = dp_ret; 5448 goto out_ok; 5449 } 5450 5451 /* 5452 * Get a context for the new current data pointer. 5453 */ 5454 hflags = INB (HF_PRT); 5455 5456 if (hflags & HF_DP_SAVED) 5457 hflags ^= HF_ACT_PM; 5458 5459 if (!(hflags & HF_ACT_PM)) { 5460 pm = &cp->phys.pm0; 5461 dp_scr = SCRIPTA_BA (np, pm0_data); 5462 } 5463 else { 5464 pm = &cp->phys.pm1; 5465 dp_scr = SCRIPTA_BA (np, pm1_data); 5466 } 5467 5468 hflags &= ~(HF_DP_SAVED); 5469 5470 OUTB (HF_PRT, hflags); 5471 5472 /* 5473 * Set up the new current data pointer. 5474 * ofs < 0 there, and for the next data phase, we 5475 * want to transfer part of the data of the sg entry 5476 * corresponding to index dp_sg-1 prior to returning 5477 * to the main data script. 5478 */ 5479 pm->ret = cpu_to_scr(dp_ret); 5480 tmp = scr_to_cpu(cp->phys.data[dp_sg-1].addr); 5481 tmp += scr_to_cpu(cp->phys.data[dp_sg-1].size) + dp_ofs; 5482 pm->sg.addr = cpu_to_scr(tmp); 5483 pm->sg.size = cpu_to_scr(-dp_ofs); 5484 5485 out_ok: 5486 OUTL (nc_temp, dp_scr); 5487 OUTL_DSP (SCRIPTA_BA (np, clrack)); 5488 return; 5489 5490 out_reject: 5491 OUTL_DSP (SCRIPTB_BA (np, msg_bad)); 5492 } 5493 5494 5495 /* 5496 * chip calculation of the data residual. 5497 * 5498 * As I used to say, the requirement of data residual 5499 * in SCSI is broken, useless and cannot be achieved 5500 * without huge complexity. 5501 * But most OSes and even the official CAM require it. 5502 * When stupidity happens to be so widely spread inside 5503 * a community, it gets hard to convince. 5504 * 5505 * Anyway, I don't care, since I am not going to use 5506 * any software that considers this data residual as 5507 * a relevant information. :) 5508 */ 5509 5510 static int sym_compute_residual(hcb_p np, ccb_p cp) 5511 { 5512 int dp_sg, resid = 0; 5513 int dp_ofs = 0; 5514 5515 /* 5516 * Check for some data lost or just thrown away. 5517 * We are not required to be quite accurate in this 5518 * situation. Btw, if we are odd for output and the 5519 * device claims some more data, it may well happen 5520 * than our residual be zero. :-) 5521 */ 5522 if (cp->xerr_status & (XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN)) { 5523 if (cp->xerr_status & XE_EXTRA_DATA) 5524 resid -= cp->extra_bytes; 5525 if (cp->xerr_status & XE_SODL_UNRUN) 5526 ++resid; 5527 if (cp->xerr_status & XE_SWIDE_OVRUN) 5528 --resid; 5529 } 5530 5531 /* 5532 * If all data has been transferred, 5533 * there is no residual. 5534 */ 5535 if (cp->phys.head.lastp == cp->phys.head.goalp) 5536 return resid; 5537 5538 /* 5539 * If no data transfer occurs, or if the data 5540 * pointer is weird, return full residual. 5541 */ 5542 if (cp->startp == cp->phys.head.lastp || 5543 sym_evaluate_dp(np, cp, scr_to_cpu(cp->phys.head.lastp), 5544 &dp_ofs) < 0) { 5545 return cp->data_len; 5546 } 5547 5548 /* 5549 * If we were auto-sensing, then we are done. 5550 */ 5551 if (cp->host_flags & HF_SENSE) { 5552 return -dp_ofs; 5553 } 5554 5555 /* 5556 * We are now full comfortable in the computation 5557 * of the data residual (2's complement). 5558 */ 5559 resid = -cp->ext_ofs; 5560 for (dp_sg = cp->ext_sg; dp_sg < SYM_CONF_MAX_SG; ++dp_sg) { 5561 u_int tmp = scr_to_cpu(cp->phys.data[dp_sg].size); 5562 resid += (tmp & 0xffffff); 5563 } 5564 5565 /* 5566 * Hopefully, the result is not too wrong. 5567 */ 5568 return resid; 5569 } 5570 5571 /* 5572 * Print out the content of a SCSI message. 5573 */ 5574 5575 static int sym_show_msg (u_char * msg) 5576 { 5577 u_char i; 5578 kprintf ("%x",*msg); 5579 if (*msg==M_EXTENDED) { 5580 for (i=1;i<8;i++) { 5581 if (i-1>msg[1]) break; 5582 kprintf ("-%x",msg[i]); 5583 } 5584 return (i+1); 5585 } else if ((*msg & 0xf0) == 0x20) { 5586 kprintf ("-%x",msg[1]); 5587 return (2); 5588 } 5589 return (1); 5590 } 5591 5592 static void sym_print_msg (ccb_p cp, char *label, u_char *msg) 5593 { 5594 PRINT_ADDR(cp); 5595 if (label) 5596 kprintf ("%s: ", label); 5597 5598 (void) sym_show_msg (msg); 5599 kprintf (".\n"); 5600 } 5601 5602 /* 5603 * Negotiation for WIDE and SYNCHRONOUS DATA TRANSFER. 5604 * 5605 * When we try to negotiate, we append the negotiation message 5606 * to the identify and (maybe) simple tag message. 5607 * The host status field is set to HS_NEGOTIATE to mark this 5608 * situation. 5609 * 5610 * If the target doesn't answer this message immediately 5611 * (as required by the standard), the SIR_NEGO_FAILED interrupt 5612 * will be raised eventually. 5613 * The handler removes the HS_NEGOTIATE status, and sets the 5614 * negotiated value to the default (async / nowide). 5615 * 5616 * If we receive a matching answer immediately, we check it 5617 * for validity, and set the values. 5618 * 5619 * If we receive a Reject message immediately, we assume the 5620 * negotiation has failed, and fall back to standard values. 5621 * 5622 * If we receive a negotiation message while not in HS_NEGOTIATE 5623 * state, it's a target initiated negotiation. We prepare a 5624 * (hopefully) valid answer, set our parameters, and send back 5625 * this answer to the target. 5626 * 5627 * If the target doesn't fetch the answer (no message out phase), 5628 * we assume the negotiation has failed, and fall back to default 5629 * settings (SIR_NEGO_PROTO interrupt). 5630 * 5631 * When we set the values, we adjust them in all ccbs belonging 5632 * to this target, in the controller's register, and in the "phys" 5633 * field of the controller's struct sym_hcb. 5634 */ 5635 5636 /* 5637 * chip handler for SYNCHRONOUS DATA TRANSFER REQUEST (SDTR) message. 5638 */ 5639 static void sym_sync_nego(hcb_p np, tcb_p tp, ccb_p cp) 5640 { 5641 u_char chg, ofs, per, fak, div; 5642 int req = 1; 5643 5644 /* 5645 * Synchronous request message received. 5646 */ 5647 if (DEBUG_FLAGS & DEBUG_NEGO) { 5648 sym_print_msg(cp, "sync msgin", np->msgin); 5649 } 5650 5651 /* 5652 * request or answer ? 5653 */ 5654 if (INB (HS_PRT) == HS_NEGOTIATE) { 5655 OUTB (HS_PRT, HS_BUSY); 5656 if (cp->nego_status && cp->nego_status != NS_SYNC) 5657 goto reject_it; 5658 req = 0; 5659 } 5660 5661 /* 5662 * get requested values. 5663 */ 5664 chg = 0; 5665 per = np->msgin[3]; 5666 ofs = np->msgin[4]; 5667 5668 /* 5669 * check values against our limits. 5670 */ 5671 if (ofs) { 5672 if (ofs > np->maxoffs) 5673 {chg = 1; ofs = np->maxoffs;} 5674 if (req) { 5675 if (ofs > tp->tinfo.user.offset) 5676 {chg = 1; ofs = tp->tinfo.user.offset;} 5677 } 5678 } 5679 5680 if (ofs) { 5681 if (per < np->minsync) 5682 {chg = 1; per = np->minsync;} 5683 if (req) { 5684 if (per < tp->tinfo.user.period) 5685 {chg = 1; per = tp->tinfo.user.period;} 5686 } 5687 } 5688 5689 div = fak = 0; 5690 if (ofs && sym_getsync(np, 0, per, &div, &fak) < 0) 5691 goto reject_it; 5692 5693 if (DEBUG_FLAGS & DEBUG_NEGO) { 5694 PRINT_ADDR(cp); 5695 kprintf ("sdtr: ofs=%d per=%d div=%d fak=%d chg=%d.\n", 5696 ofs, per, div, fak, chg); 5697 } 5698 5699 /* 5700 * This was an answer message 5701 */ 5702 if (req == 0) { 5703 if (chg) /* Answer wasn't acceptable. */ 5704 goto reject_it; 5705 sym_setsync (np, cp, ofs, per, div, fak); 5706 OUTL_DSP (SCRIPTA_BA (np, clrack)); 5707 return; 5708 } 5709 5710 /* 5711 * It was a request. Set value and 5712 * prepare an answer message 5713 */ 5714 sym_setsync (np, cp, ofs, per, div, fak); 5715 5716 np->msgout[0] = M_EXTENDED; 5717 np->msgout[1] = 3; 5718 np->msgout[2] = M_X_SYNC_REQ; 5719 np->msgout[3] = per; 5720 np->msgout[4] = ofs; 5721 5722 cp->nego_status = NS_SYNC; 5723 5724 if (DEBUG_FLAGS & DEBUG_NEGO) { 5725 sym_print_msg(cp, "sync msgout", np->msgout); 5726 } 5727 5728 np->msgin [0] = M_NOOP; 5729 5730 OUTL_DSP (SCRIPTB_BA (np, sdtr_resp)); 5731 return; 5732 reject_it: 5733 sym_setsync (np, cp, 0, 0, 0, 0); 5734 OUTL_DSP (SCRIPTB_BA (np, msg_bad)); 5735 } 5736 5737 /* 5738 * chip handler for PARALLEL PROTOCOL REQUEST (PPR) message. 5739 */ 5740 static void sym_ppr_nego(hcb_p np, tcb_p tp, ccb_p cp) 5741 { 5742 u_char chg, ofs, per, fak, dt, div, wide; 5743 int req = 1; 5744 5745 /* 5746 * Synchronous request message received. 5747 */ 5748 if (DEBUG_FLAGS & DEBUG_NEGO) { 5749 sym_print_msg(cp, "ppr msgin", np->msgin); 5750 } 5751 5752 /* 5753 * get requested values. 5754 */ 5755 chg = 0; 5756 per = np->msgin[3]; 5757 ofs = np->msgin[5]; 5758 wide = np->msgin[6]; 5759 dt = np->msgin[7] & PPR_OPT_DT; 5760 5761 /* 5762 * request or answer ? 5763 */ 5764 if (INB (HS_PRT) == HS_NEGOTIATE) { 5765 OUTB (HS_PRT, HS_BUSY); 5766 if (cp->nego_status && cp->nego_status != NS_PPR) 5767 goto reject_it; 5768 req = 0; 5769 } 5770 5771 /* 5772 * check values against our limits. 5773 */ 5774 if (wide > np->maxwide) 5775 {chg = 1; wide = np->maxwide;} 5776 if (!wide || !(np->features & FE_ULTRA3)) 5777 dt &= ~PPR_OPT_DT; 5778 if (req) { 5779 if (wide > tp->tinfo.user.width) 5780 {chg = 1; wide = tp->tinfo.user.width;} 5781 } 5782 5783 if (!(np->features & FE_U3EN)) /* Broken U3EN bit not supported */ 5784 dt &= ~PPR_OPT_DT; 5785 5786 if (dt != (np->msgin[7] & PPR_OPT_MASK)) chg = 1; 5787 5788 if (ofs) { 5789 if (dt) { 5790 if (ofs > np->maxoffs_dt) 5791 {chg = 1; ofs = np->maxoffs_dt;} 5792 } 5793 else if (ofs > np->maxoffs) 5794 {chg = 1; ofs = np->maxoffs;} 5795 if (req) { 5796 if (ofs > tp->tinfo.user.offset) 5797 {chg = 1; ofs = tp->tinfo.user.offset;} 5798 } 5799 } 5800 5801 if (ofs) { 5802 if (dt) { 5803 if (per < np->minsync_dt) 5804 {chg = 1; per = np->minsync_dt;} 5805 } 5806 else if (per < np->minsync) 5807 {chg = 1; per = np->minsync;} 5808 if (req) { 5809 if (per < tp->tinfo.user.period) 5810 {chg = 1; per = tp->tinfo.user.period;} 5811 } 5812 } 5813 5814 div = fak = 0; 5815 if (ofs && sym_getsync(np, dt, per, &div, &fak) < 0) 5816 goto reject_it; 5817 5818 if (DEBUG_FLAGS & DEBUG_NEGO) { 5819 PRINT_ADDR(cp); 5820 kprintf ("ppr: " 5821 "dt=%x ofs=%d per=%d wide=%d div=%d fak=%d chg=%d.\n", 5822 dt, ofs, per, wide, div, fak, chg); 5823 } 5824 5825 /* 5826 * It was an answer. 5827 */ 5828 if (req == 0) { 5829 if (chg) /* Answer wasn't acceptable */ 5830 goto reject_it; 5831 sym_setpprot (np, cp, dt, ofs, per, wide, div, fak); 5832 OUTL_DSP (SCRIPTA_BA (np, clrack)); 5833 return; 5834 } 5835 5836 /* 5837 * It was a request. Set value and 5838 * prepare an answer message 5839 */ 5840 sym_setpprot (np, cp, dt, ofs, per, wide, div, fak); 5841 5842 np->msgout[0] = M_EXTENDED; 5843 np->msgout[1] = 6; 5844 np->msgout[2] = M_X_PPR_REQ; 5845 np->msgout[3] = per; 5846 np->msgout[4] = 0; 5847 np->msgout[5] = ofs; 5848 np->msgout[6] = wide; 5849 np->msgout[7] = dt; 5850 5851 cp->nego_status = NS_PPR; 5852 5853 if (DEBUG_FLAGS & DEBUG_NEGO) { 5854 sym_print_msg(cp, "ppr msgout", np->msgout); 5855 } 5856 5857 np->msgin [0] = M_NOOP; 5858 5859 OUTL_DSP (SCRIPTB_BA (np, ppr_resp)); 5860 return; 5861 reject_it: 5862 sym_setpprot (np, cp, 0, 0, 0, 0, 0, 0); 5863 OUTL_DSP (SCRIPTB_BA (np, msg_bad)); 5864 /* 5865 * If it was a device response that should result in 5866 * ST, we may want to try a legacy negotiation later. 5867 */ 5868 if (!req && !dt) { 5869 tp->tinfo.goal.options = 0; 5870 tp->tinfo.goal.width = wide; 5871 tp->tinfo.goal.period = per; 5872 tp->tinfo.goal.offset = ofs; 5873 } 5874 } 5875 5876 /* 5877 * chip handler for WIDE DATA TRANSFER REQUEST (WDTR) message. 5878 */ 5879 static void sym_wide_nego(hcb_p np, tcb_p tp, ccb_p cp) 5880 { 5881 u_char chg, wide; 5882 int req = 1; 5883 5884 /* 5885 * Wide request message received. 5886 */ 5887 if (DEBUG_FLAGS & DEBUG_NEGO) { 5888 sym_print_msg(cp, "wide msgin", np->msgin); 5889 } 5890 5891 /* 5892 * Is it a request from the device? 5893 */ 5894 if (INB (HS_PRT) == HS_NEGOTIATE) { 5895 OUTB (HS_PRT, HS_BUSY); 5896 if (cp->nego_status && cp->nego_status != NS_WIDE) 5897 goto reject_it; 5898 req = 0; 5899 } 5900 5901 /* 5902 * get requested values. 5903 */ 5904 chg = 0; 5905 wide = np->msgin[3]; 5906 5907 /* 5908 * check values against driver limits. 5909 */ 5910 if (wide > np->maxwide) 5911 {chg = 1; wide = np->maxwide;} 5912 if (req) { 5913 if (wide > tp->tinfo.user.width) 5914 {chg = 1; wide = tp->tinfo.user.width;} 5915 } 5916 5917 if (DEBUG_FLAGS & DEBUG_NEGO) { 5918 PRINT_ADDR(cp); 5919 kprintf ("wdtr: wide=%d chg=%d.\n", wide, chg); 5920 } 5921 5922 /* 5923 * This was an answer message 5924 */ 5925 if (req == 0) { 5926 if (chg) /* Answer wasn't acceptable. */ 5927 goto reject_it; 5928 sym_setwide (np, cp, wide); 5929 5930 /* 5931 * Negotiate for SYNC immediately after WIDE response. 5932 * This allows to negotiate for both WIDE and SYNC on 5933 * a single SCSI command (Suggested by Justin Gibbs). 5934 */ 5935 if (tp->tinfo.goal.offset) { 5936 np->msgout[0] = M_EXTENDED; 5937 np->msgout[1] = 3; 5938 np->msgout[2] = M_X_SYNC_REQ; 5939 np->msgout[3] = tp->tinfo.goal.period; 5940 np->msgout[4] = tp->tinfo.goal.offset; 5941 5942 if (DEBUG_FLAGS & DEBUG_NEGO) { 5943 sym_print_msg(cp, "sync msgout", np->msgout); 5944 } 5945 5946 cp->nego_status = NS_SYNC; 5947 OUTB (HS_PRT, HS_NEGOTIATE); 5948 OUTL_DSP (SCRIPTB_BA (np, sdtr_resp)); 5949 return; 5950 } 5951 5952 OUTL_DSP (SCRIPTA_BA (np, clrack)); 5953 return; 5954 } 5955 5956 /* 5957 * It was a request, set value and 5958 * prepare an answer message 5959 */ 5960 sym_setwide (np, cp, wide); 5961 5962 np->msgout[0] = M_EXTENDED; 5963 np->msgout[1] = 2; 5964 np->msgout[2] = M_X_WIDE_REQ; 5965 np->msgout[3] = wide; 5966 5967 np->msgin [0] = M_NOOP; 5968 5969 cp->nego_status = NS_WIDE; 5970 5971 if (DEBUG_FLAGS & DEBUG_NEGO) { 5972 sym_print_msg(cp, "wide msgout", np->msgout); 5973 } 5974 5975 OUTL_DSP (SCRIPTB_BA (np, wdtr_resp)); 5976 return; 5977 reject_it: 5978 OUTL_DSP (SCRIPTB_BA (np, msg_bad)); 5979 } 5980 5981 /* 5982 * Reset SYNC or WIDE to default settings. 5983 * 5984 * Called when a negotiation does not succeed either 5985 * on rejection or on protocol error. 5986 * 5987 * If it was a PPR that made problems, we may want to 5988 * try a legacy negotiation later. 5989 */ 5990 static void sym_nego_default(hcb_p np, tcb_p tp, ccb_p cp) 5991 { 5992 /* 5993 * any error in negotiation: 5994 * fall back to default mode. 5995 */ 5996 switch (cp->nego_status) { 5997 case NS_PPR: 5998 #if 0 5999 sym_setpprot (np, cp, 0, 0, 0, 0, 0, 0); 6000 #else 6001 tp->tinfo.goal.options = 0; 6002 if (tp->tinfo.goal.period < np->minsync) 6003 tp->tinfo.goal.period = np->minsync; 6004 if (tp->tinfo.goal.offset > np->maxoffs) 6005 tp->tinfo.goal.offset = np->maxoffs; 6006 #endif 6007 break; 6008 case NS_SYNC: 6009 sym_setsync (np, cp, 0, 0, 0, 0); 6010 break; 6011 case NS_WIDE: 6012 sym_setwide (np, cp, 0); 6013 break; 6014 } 6015 np->msgin [0] = M_NOOP; 6016 np->msgout[0] = M_NOOP; 6017 cp->nego_status = 0; 6018 } 6019 6020 /* 6021 * chip handler for MESSAGE REJECT received in response to 6022 * a WIDE or SYNCHRONOUS negotiation. 6023 */ 6024 static void sym_nego_rejected(hcb_p np, tcb_p tp, ccb_p cp) 6025 { 6026 sym_nego_default(np, tp, cp); 6027 OUTB (HS_PRT, HS_BUSY); 6028 } 6029 6030 /* 6031 * chip exception handler for programmed interrupts. 6032 */ 6033 static void sym_int_sir (hcb_p np) 6034 { 6035 u_char num = INB (nc_dsps); 6036 u32 dsa = INL (nc_dsa); 6037 ccb_p cp = sym_ccb_from_dsa(np, dsa); 6038 u_char target = INB (nc_sdid) & 0x0f; 6039 tcb_p tp = &np->target[target]; 6040 int tmp; 6041 6042 SYM_LOCK_ASSERT(LK_EXCLUSIVE); 6043 6044 if (DEBUG_FLAGS & DEBUG_TINY) kprintf ("I#%d", num); 6045 6046 switch (num) { 6047 /* 6048 * Command has been completed with error condition 6049 * or has been auto-sensed. 6050 */ 6051 case SIR_COMPLETE_ERROR: 6052 sym_complete_error(np, cp); 6053 return; 6054 /* 6055 * The C code is currently trying to recover from something. 6056 * Typically, user want to abort some command. 6057 */ 6058 case SIR_SCRIPT_STOPPED: 6059 case SIR_TARGET_SELECTED: 6060 case SIR_ABORT_SENT: 6061 sym_sir_task_recovery(np, num); 6062 return; 6063 /* 6064 * The device didn't go to MSG OUT phase after having 6065 * been selected with ATN. We donnot want to handle 6066 * that. 6067 */ 6068 case SIR_SEL_ATN_NO_MSG_OUT: 6069 kprintf ("%s:%d: No MSG OUT phase after selection with ATN.\n", 6070 sym_name (np), target); 6071 goto out_stuck; 6072 /* 6073 * The device didn't switch to MSG IN phase after 6074 * having reseleted the initiator. 6075 */ 6076 case SIR_RESEL_NO_MSG_IN: 6077 kprintf ("%s:%d: No MSG IN phase after reselection.\n", 6078 sym_name (np), target); 6079 goto out_stuck; 6080 /* 6081 * After reselection, the device sent a message that wasn't 6082 * an IDENTIFY. 6083 */ 6084 case SIR_RESEL_NO_IDENTIFY: 6085 kprintf ("%s:%d: No IDENTIFY after reselection.\n", 6086 sym_name (np), target); 6087 goto out_stuck; 6088 /* 6089 * The device reselected a LUN we donnot know about. 6090 */ 6091 case SIR_RESEL_BAD_LUN: 6092 np->msgout[0] = M_RESET; 6093 goto out; 6094 /* 6095 * The device reselected for an untagged nexus and we 6096 * haven't any. 6097 */ 6098 case SIR_RESEL_BAD_I_T_L: 6099 np->msgout[0] = M_ABORT; 6100 goto out; 6101 /* 6102 * The device reselected for a tagged nexus that we donnot 6103 * have. 6104 */ 6105 case SIR_RESEL_BAD_I_T_L_Q: 6106 np->msgout[0] = M_ABORT_TAG; 6107 goto out; 6108 /* 6109 * The SCRIPTS let us know that the device has grabbed 6110 * our message and will abort the job. 6111 */ 6112 case SIR_RESEL_ABORTED: 6113 np->lastmsg = np->msgout[0]; 6114 np->msgout[0] = M_NOOP; 6115 kprintf ("%s:%d: message %x sent on bad reselection.\n", 6116 sym_name (np), target, np->lastmsg); 6117 goto out; 6118 /* 6119 * The SCRIPTS let us know that a message has been 6120 * successfully sent to the device. 6121 */ 6122 case SIR_MSG_OUT_DONE: 6123 np->lastmsg = np->msgout[0]; 6124 np->msgout[0] = M_NOOP; 6125 /* Should we really care of that */ 6126 if (np->lastmsg == M_PARITY || np->lastmsg == M_ID_ERROR) { 6127 if (cp) { 6128 cp->xerr_status &= ~XE_PARITY_ERR; 6129 if (!cp->xerr_status) 6130 OUTOFFB (HF_PRT, HF_EXT_ERR); 6131 } 6132 } 6133 goto out; 6134 /* 6135 * The device didn't send a GOOD SCSI status. 6136 * We may have some work to do prior to allow 6137 * the SCRIPTS processor to continue. 6138 */ 6139 case SIR_BAD_SCSI_STATUS: 6140 if (!cp) 6141 goto out; 6142 sym_sir_bad_scsi_status(np, num, cp); 6143 return; 6144 /* 6145 * We are asked by the SCRIPTS to prepare a 6146 * REJECT message. 6147 */ 6148 case SIR_REJECT_TO_SEND: 6149 sym_print_msg(cp, "M_REJECT to send for ", np->msgin); 6150 np->msgout[0] = M_REJECT; 6151 goto out; 6152 /* 6153 * We have been ODD at the end of a DATA IN 6154 * transfer and the device didn't send a 6155 * IGNORE WIDE RESIDUE message. 6156 * It is a data overrun condition. 6157 */ 6158 case SIR_SWIDE_OVERRUN: 6159 if (cp) { 6160 OUTONB (HF_PRT, HF_EXT_ERR); 6161 cp->xerr_status |= XE_SWIDE_OVRUN; 6162 } 6163 goto out; 6164 /* 6165 * We have been ODD at the end of a DATA OUT 6166 * transfer. 6167 * It is a data underrun condition. 6168 */ 6169 case SIR_SODL_UNDERRUN: 6170 if (cp) { 6171 OUTONB (HF_PRT, HF_EXT_ERR); 6172 cp->xerr_status |= XE_SODL_UNRUN; 6173 } 6174 goto out; 6175 /* 6176 * The device wants us to tranfer more data than 6177 * expected or in the wrong direction. 6178 * The number of extra bytes is in scratcha. 6179 * It is a data overrun condition. 6180 */ 6181 case SIR_DATA_OVERRUN: 6182 if (cp) { 6183 OUTONB (HF_PRT, HF_EXT_ERR); 6184 cp->xerr_status |= XE_EXTRA_DATA; 6185 cp->extra_bytes += INL (nc_scratcha); 6186 } 6187 goto out; 6188 /* 6189 * The device switched to an illegal phase (4/5). 6190 */ 6191 case SIR_BAD_PHASE: 6192 if (cp) { 6193 OUTONB (HF_PRT, HF_EXT_ERR); 6194 cp->xerr_status |= XE_BAD_PHASE; 6195 } 6196 goto out; 6197 /* 6198 * We received a message. 6199 */ 6200 case SIR_MSG_RECEIVED: 6201 if (!cp) 6202 goto out_stuck; 6203 switch (np->msgin [0]) { 6204 /* 6205 * We received an extended message. 6206 * We handle MODIFY DATA POINTER, SDTR, WDTR 6207 * and reject all other extended messages. 6208 */ 6209 case M_EXTENDED: 6210 switch (np->msgin [2]) { 6211 case M_X_MODIFY_DP: 6212 if (DEBUG_FLAGS & DEBUG_POINTER) 6213 sym_print_msg(cp,"modify DP",np->msgin); 6214 tmp = (np->msgin[3]<<24) + (np->msgin[4]<<16) + 6215 (np->msgin[5]<<8) + (np->msgin[6]); 6216 sym_modify_dp(np, tp, cp, tmp); 6217 return; 6218 case M_X_SYNC_REQ: 6219 sym_sync_nego(np, tp, cp); 6220 return; 6221 case M_X_PPR_REQ: 6222 sym_ppr_nego(np, tp, cp); 6223 return; 6224 case M_X_WIDE_REQ: 6225 sym_wide_nego(np, tp, cp); 6226 return; 6227 default: 6228 goto out_reject; 6229 } 6230 break; 6231 /* 6232 * We received a 1/2 byte message not handled from SCRIPTS. 6233 * We are only expecting MESSAGE REJECT and IGNORE WIDE 6234 * RESIDUE messages that haven't been anticipated by 6235 * SCRIPTS on SWIDE full condition. Unanticipated IGNORE 6236 * WIDE RESIDUE messages are aliased as MODIFY DP (-1). 6237 */ 6238 case M_IGN_RESIDUE: 6239 if (DEBUG_FLAGS & DEBUG_POINTER) 6240 sym_print_msg(cp,"ign wide residue", np->msgin); 6241 sym_modify_dp(np, tp, cp, -1); 6242 return; 6243 case M_REJECT: 6244 if (INB (HS_PRT) == HS_NEGOTIATE) 6245 sym_nego_rejected(np, tp, cp); 6246 else { 6247 PRINT_ADDR(cp); 6248 kprintf ("M_REJECT received (%x:%x).\n", 6249 scr_to_cpu(np->lastmsg), np->msgout[0]); 6250 } 6251 goto out_clrack; 6252 break; 6253 default: 6254 goto out_reject; 6255 } 6256 break; 6257 /* 6258 * We received an unknown message. 6259 * Ignore all MSG IN phases and reject it. 6260 */ 6261 case SIR_MSG_WEIRD: 6262 sym_print_msg(cp, "WEIRD message received", np->msgin); 6263 OUTL_DSP (SCRIPTB_BA (np, msg_weird)); 6264 return; 6265 /* 6266 * Negotiation failed. 6267 * Target does not send us the reply. 6268 * Remove the HS_NEGOTIATE status. 6269 */ 6270 case SIR_NEGO_FAILED: 6271 OUTB (HS_PRT, HS_BUSY); 6272 /* 6273 * Negotiation failed. 6274 * Target does not want answer message. 6275 */ 6276 case SIR_NEGO_PROTO: 6277 sym_nego_default(np, tp, cp); 6278 goto out; 6279 } 6280 6281 out: 6282 OUTONB_STD (); 6283 return; 6284 out_reject: 6285 OUTL_DSP (SCRIPTB_BA (np, msg_bad)); 6286 return; 6287 out_clrack: 6288 OUTL_DSP (SCRIPTA_BA (np, clrack)); 6289 return; 6290 out_stuck: 6291 return; 6292 } 6293 6294 /* 6295 * Acquire a control block 6296 */ 6297 static ccb_p sym_get_ccb (hcb_p np, u_char tn, u_char ln, u_char tag_order) 6298 { 6299 tcb_p tp = &np->target[tn]; 6300 lcb_p lp = sym_lp(np, tp, ln); 6301 u_short tag = NO_TAG; 6302 SYM_QUEHEAD *qp; 6303 ccb_p cp = NULL; 6304 6305 /* 6306 * Look for a free CCB 6307 */ 6308 if (sym_que_empty(&np->free_ccbq)) 6309 goto out; 6310 qp = sym_remque_head(&np->free_ccbq); 6311 if (!qp) 6312 goto out; 6313 cp = sym_que_entry(qp, struct sym_ccb, link_ccbq); 6314 6315 /* 6316 * If the LCB is not yet available and the LUN 6317 * has been probed ok, try to allocate the LCB. 6318 */ 6319 if (!lp && sym_is_bit(tp->lun_map, ln)) { 6320 lp = sym_alloc_lcb(np, tn, ln); 6321 if (!lp) 6322 goto out_free; 6323 } 6324 6325 /* 6326 * If the LCB is not available here, then the 6327 * logical unit is not yet discovered. For those 6328 * ones only accept 1 SCSI IO per logical unit, 6329 * since we cannot allow disconnections. 6330 */ 6331 if (!lp) { 6332 if (!sym_is_bit(tp->busy0_map, ln)) 6333 sym_set_bit(tp->busy0_map, ln); 6334 else 6335 goto out_free; 6336 } else { 6337 /* 6338 * If we have been asked for a tagged command. 6339 */ 6340 if (tag_order) { 6341 /* 6342 * Debugging purpose. 6343 */ 6344 assert(lp->busy_itl == 0); 6345 /* 6346 * Allocate resources for tags if not yet. 6347 */ 6348 if (!lp->cb_tags) { 6349 sym_alloc_lcb_tags(np, tn, ln); 6350 if (!lp->cb_tags) 6351 goto out_free; 6352 } 6353 /* 6354 * Get a tag for this SCSI IO and set up 6355 * the CCB bus address for reselection, 6356 * and count it for this LUN. 6357 * Toggle reselect path to tagged. 6358 */ 6359 if (lp->busy_itlq < SYM_CONF_MAX_TASK) { 6360 tag = lp->cb_tags[lp->ia_tag]; 6361 if (++lp->ia_tag == SYM_CONF_MAX_TASK) 6362 lp->ia_tag = 0; 6363 lp->itlq_tbl[tag] = cpu_to_scr(cp->ccb_ba); 6364 ++lp->busy_itlq; 6365 lp->head.resel_sa = 6366 cpu_to_scr(SCRIPTA_BA (np, resel_tag)); 6367 } 6368 else 6369 goto out_free; 6370 } 6371 /* 6372 * This command will not be tagged. 6373 * If we already have either a tagged or untagged 6374 * one, refuse to overlap this untagged one. 6375 */ 6376 else { 6377 /* 6378 * Debugging purpose. 6379 */ 6380 assert(lp->busy_itl == 0 && lp->busy_itlq == 0); 6381 /* 6382 * Count this nexus for this LUN. 6383 * Set up the CCB bus address for reselection. 6384 * Toggle reselect path to untagged. 6385 */ 6386 if (++lp->busy_itl == 1) { 6387 lp->head.itl_task_sa = cpu_to_scr(cp->ccb_ba); 6388 lp->head.resel_sa = 6389 cpu_to_scr(SCRIPTA_BA (np, resel_no_tag)); 6390 } 6391 else 6392 goto out_free; 6393 } 6394 } 6395 /* 6396 * Put the CCB into the busy queue. 6397 */ 6398 sym_insque_tail(&cp->link_ccbq, &np->busy_ccbq); 6399 6400 /* 6401 * Remember all informations needed to free this CCB. 6402 */ 6403 cp->to_abort = 0; 6404 cp->tag = tag; 6405 cp->target = tn; 6406 cp->lun = ln; 6407 6408 if (DEBUG_FLAGS & DEBUG_TAGS) { 6409 PRINT_LUN(np, tn, ln); 6410 kprintf ("ccb @%p using tag %d.\n", cp, tag); 6411 } 6412 6413 out: 6414 return cp; 6415 out_free: 6416 sym_insque_head(&cp->link_ccbq, &np->free_ccbq); 6417 return NULL; 6418 } 6419 6420 /* 6421 * Release one control block 6422 */ 6423 static void sym_free_ccb (hcb_p np, ccb_p cp) 6424 { 6425 tcb_p tp = &np->target[cp->target]; 6426 lcb_p lp = sym_lp(np, tp, cp->lun); 6427 6428 if (DEBUG_FLAGS & DEBUG_TAGS) { 6429 PRINT_LUN(np, cp->target, cp->lun); 6430 kprintf ("ccb @%p freeing tag %d.\n", cp, cp->tag); 6431 } 6432 6433 /* 6434 * If LCB available, 6435 */ 6436 if (lp) { 6437 /* 6438 * If tagged, release the tag, set the relect path 6439 */ 6440 if (cp->tag != NO_TAG) { 6441 /* 6442 * Free the tag value. 6443 */ 6444 lp->cb_tags[lp->if_tag] = cp->tag; 6445 if (++lp->if_tag == SYM_CONF_MAX_TASK) 6446 lp->if_tag = 0; 6447 /* 6448 * Make the reselect path invalid, 6449 * and uncount this CCB. 6450 */ 6451 lp->itlq_tbl[cp->tag] = cpu_to_scr(np->bad_itlq_ba); 6452 --lp->busy_itlq; 6453 } else { /* Untagged */ 6454 /* 6455 * Make the reselect path invalid, 6456 * and uncount this CCB. 6457 */ 6458 lp->head.itl_task_sa = cpu_to_scr(np->bad_itl_ba); 6459 --lp->busy_itl; 6460 } 6461 /* 6462 * If no JOB active, make the LUN reselect path invalid. 6463 */ 6464 if (lp->busy_itlq == 0 && lp->busy_itl == 0) 6465 lp->head.resel_sa = 6466 cpu_to_scr(SCRIPTB_BA (np, resel_bad_lun)); 6467 } 6468 /* 6469 * Otherwise, we only accept 1 IO per LUN. 6470 * Clear the bit that keeps track of this IO. 6471 */ 6472 else 6473 sym_clr_bit(tp->busy0_map, cp->lun); 6474 6475 /* 6476 * We donnot queue more than 1 ccb per target 6477 * with negotiation at any time. If this ccb was 6478 * used for negotiation, clear this info in the tcb. 6479 */ 6480 if (cp == tp->nego_cp) 6481 tp->nego_cp = NULL; 6482 6483 #ifdef SYM_CONF_IARB_SUPPORT 6484 /* 6485 * If we just complete the last queued CCB, 6486 * clear this info that is no longer relevant. 6487 */ 6488 if (cp == np->last_cp) 6489 np->last_cp = NULL; 6490 #endif 6491 6492 /* 6493 * Unmap user data from DMA map if needed. 6494 */ 6495 if (cp->dmamapped) { 6496 bus_dmamap_unload(np->data_dmat, cp->dmamap); 6497 cp->dmamapped = 0; 6498 } 6499 6500 /* 6501 * Make this CCB available. 6502 */ 6503 cp->cam_ccb = NULL; 6504 cp->host_status = HS_IDLE; 6505 sym_remque(&cp->link_ccbq); 6506 sym_insque_head(&cp->link_ccbq, &np->free_ccbq); 6507 } 6508 6509 /* 6510 * Allocate a CCB from memory and initialize its fixed part. 6511 */ 6512 static ccb_p sym_alloc_ccb(hcb_p np) 6513 { 6514 ccb_p cp = NULL; 6515 int hcode; 6516 6517 SYM_LOCK_ASSERT(0); 6518 6519 /* 6520 * Prevent from allocating more CCBs than we can 6521 * queue to the controller. 6522 */ 6523 if (np->actccbs >= SYM_CONF_MAX_START) 6524 return NULL; 6525 6526 /* 6527 * Allocate memory for this CCB. 6528 */ 6529 cp = sym_calloc_dma(sizeof(struct sym_ccb), "CCB"); 6530 if (!cp) 6531 return NULL; 6532 6533 /* 6534 * Allocate a bounce buffer for sense data. 6535 */ 6536 cp->sns_bbuf = sym_calloc_dma(SYM_SNS_BBUF_LEN, "SNS_BBUF"); 6537 if (!cp->sns_bbuf) 6538 goto out_free; 6539 6540 /* 6541 * Allocate a map for the DMA of user data. 6542 */ 6543 if (bus_dmamap_create(np->data_dmat, 0, &cp->dmamap)) 6544 goto out_free; 6545 /* 6546 * Count it. 6547 */ 6548 np->actccbs++; 6549 6550 /* 6551 * Initialize the callout. 6552 */ 6553 callout_init(&cp->ch); 6554 6555 /* 6556 * Compute the bus address of this ccb. 6557 */ 6558 cp->ccb_ba = vtobus(cp); 6559 6560 /* 6561 * Insert this ccb into the hashed list. 6562 */ 6563 hcode = CCB_HASH_CODE(cp->ccb_ba); 6564 cp->link_ccbh = np->ccbh[hcode]; 6565 np->ccbh[hcode] = cp; 6566 6567 /* 6568 * Initialize the start and restart actions. 6569 */ 6570 cp->phys.head.go.start = cpu_to_scr(SCRIPTA_BA (np, idle)); 6571 cp->phys.head.go.restart = cpu_to_scr(SCRIPTB_BA (np, bad_i_t_l)); 6572 6573 /* 6574 * Initilialyze some other fields. 6575 */ 6576 cp->phys.smsg_ext.addr = cpu_to_scr(HCB_BA(np, msgin[2])); 6577 6578 /* 6579 * Chain into free ccb queue. 6580 */ 6581 sym_insque_head(&cp->link_ccbq, &np->free_ccbq); 6582 6583 return cp; 6584 out_free: 6585 if (cp->sns_bbuf) 6586 sym_mfree_dma(cp->sns_bbuf, SYM_SNS_BBUF_LEN, "SNS_BBUF"); 6587 sym_mfree_dma(cp, sizeof(*cp), "CCB"); 6588 return NULL; 6589 } 6590 6591 /* 6592 * Look up a CCB from a DSA value. 6593 */ 6594 static ccb_p sym_ccb_from_dsa(hcb_p np, u32 dsa) 6595 { 6596 int hcode; 6597 ccb_p cp; 6598 6599 hcode = CCB_HASH_CODE(dsa); 6600 cp = np->ccbh[hcode]; 6601 while (cp) { 6602 if (cp->ccb_ba == dsa) 6603 break; 6604 cp = cp->link_ccbh; 6605 } 6606 6607 return cp; 6608 } 6609 6610 /* 6611 * Target control block initialisation. 6612 * Nothing important to do at the moment. 6613 */ 6614 static void sym_init_tcb (hcb_p np, u_char tn) 6615 { 6616 /* 6617 * Check some alignments required by the chip. 6618 */ 6619 assert (((offsetof(struct sym_reg, nc_sxfer) ^ 6620 offsetof(struct sym_tcb, head.sval)) &3) == 0); 6621 assert (((offsetof(struct sym_reg, nc_scntl3) ^ 6622 offsetof(struct sym_tcb, head.wval)) &3) == 0); 6623 } 6624 6625 /* 6626 * Lun control block allocation and initialization. 6627 */ 6628 static lcb_p sym_alloc_lcb (hcb_p np, u_char tn, u_char ln) 6629 { 6630 tcb_p tp = &np->target[tn]; 6631 lcb_p lp = sym_lp(np, tp, ln); 6632 6633 /* 6634 * Already done, just return. 6635 */ 6636 if (lp) 6637 return lp; 6638 /* 6639 * Check against some race. 6640 */ 6641 assert(!sym_is_bit(tp->busy0_map, ln)); 6642 6643 /* 6644 * Initialize the target control block if not yet. 6645 */ 6646 sym_init_tcb (np, tn); 6647 6648 /* 6649 * Allocate the LCB bus address array. 6650 * Compute the bus address of this table. 6651 */ 6652 if (ln && !tp->luntbl) { 6653 int i; 6654 6655 tp->luntbl = sym_calloc_dma(256, "LUNTBL"); 6656 if (!tp->luntbl) 6657 goto fail; 6658 for (i = 0 ; i < 64 ; i++) 6659 tp->luntbl[i] = cpu_to_scr(vtobus(&np->badlun_sa)); 6660 tp->head.luntbl_sa = cpu_to_scr(vtobus(tp->luntbl)); 6661 } 6662 6663 /* 6664 * Allocate the table of pointers for LUN(s) > 0, if needed. 6665 */ 6666 if (ln && !tp->lunmp) { 6667 tp->lunmp = sym_calloc(SYM_CONF_MAX_LUN * sizeof(lcb_p), 6668 "LUNMP"); 6669 if (!tp->lunmp) 6670 goto fail; 6671 } 6672 6673 /* 6674 * Allocate the lcb. 6675 * Make it available to the chip. 6676 */ 6677 lp = sym_calloc_dma(sizeof(struct sym_lcb), "LCB"); 6678 if (!lp) 6679 goto fail; 6680 if (ln) { 6681 tp->lunmp[ln] = lp; 6682 tp->luntbl[ln] = cpu_to_scr(vtobus(lp)); 6683 } 6684 else { 6685 tp->lun0p = lp; 6686 tp->head.lun0_sa = cpu_to_scr(vtobus(lp)); 6687 } 6688 6689 /* 6690 * Let the itl task point to error handling. 6691 */ 6692 lp->head.itl_task_sa = cpu_to_scr(np->bad_itl_ba); 6693 6694 /* 6695 * Set the reselect pattern to our default. :) 6696 */ 6697 lp->head.resel_sa = cpu_to_scr(SCRIPTB_BA (np, resel_bad_lun)); 6698 6699 /* 6700 * Set user capabilities. 6701 */ 6702 lp->user_flags = tp->usrflags & (SYM_DISC_ENABLED | SYM_TAGS_ENABLED); 6703 6704 fail: 6705 return lp; 6706 } 6707 6708 /* 6709 * Allocate LCB resources for tagged command queuing. 6710 */ 6711 static void sym_alloc_lcb_tags (hcb_p np, u_char tn, u_char ln) 6712 { 6713 tcb_p tp = &np->target[tn]; 6714 lcb_p lp = sym_lp(np, tp, ln); 6715 int i; 6716 6717 /* 6718 * If LCB not available, try to allocate it. 6719 */ 6720 if (!lp && !(lp = sym_alloc_lcb(np, tn, ln))) 6721 return; 6722 6723 /* 6724 * Allocate the task table and and the tag allocation 6725 * circular buffer. We want both or none. 6726 */ 6727 lp->itlq_tbl = sym_calloc_dma(SYM_CONF_MAX_TASK*4, "ITLQ_TBL"); 6728 if (!lp->itlq_tbl) 6729 return; 6730 lp->cb_tags = sym_calloc(SYM_CONF_MAX_TASK, "CB_TAGS"); 6731 if (!lp->cb_tags) { 6732 sym_mfree_dma(lp->itlq_tbl, SYM_CONF_MAX_TASK*4, "ITLQ_TBL"); 6733 lp->itlq_tbl = NULL; 6734 return; 6735 } 6736 6737 /* 6738 * Initialize the task table with invalid entries. 6739 */ 6740 for (i = 0 ; i < SYM_CONF_MAX_TASK ; i++) 6741 lp->itlq_tbl[i] = cpu_to_scr(np->notask_ba); 6742 6743 /* 6744 * Fill up the tag buffer with tag numbers. 6745 */ 6746 for (i = 0 ; i < SYM_CONF_MAX_TASK ; i++) 6747 lp->cb_tags[i] = i; 6748 6749 /* 6750 * Make the task table available to SCRIPTS, 6751 * And accept tagged commands now. 6752 */ 6753 lp->head.itlq_tbl_sa = cpu_to_scr(vtobus(lp->itlq_tbl)); 6754 } 6755 6756 /* 6757 * Test the pci bus snoop logic :-( 6758 * 6759 * Has to be called with interrupts disabled. 6760 */ 6761 #ifndef SYM_CONF_IOMAPPED 6762 static int sym_regtest (hcb_p np) 6763 { 6764 volatile u32 data; 6765 /* 6766 * chip registers may NOT be cached. 6767 * write 0xffffffff to a read only register area, 6768 * and try to read it back. 6769 */ 6770 data = 0xffffffff; 6771 OUTL_OFF(offsetof(struct sym_reg, nc_dstat), data); 6772 data = INL_OFF(offsetof(struct sym_reg, nc_dstat)); 6773 #if 1 6774 if (data == 0xffffffff) { 6775 #else 6776 if ((data & 0xe2f0fffd) != 0x02000080) { 6777 #endif 6778 kprintf ("CACHE TEST FAILED: reg dstat-sstat2 readback %x.\n", 6779 (unsigned) data); 6780 return (0x10); 6781 } 6782 return (0); 6783 } 6784 #endif 6785 6786 static int sym_snooptest (hcb_p np) 6787 { 6788 u32 sym_rd, sym_wr, sym_bk, host_rd, host_wr, pc, dstat; 6789 int i, err=0; 6790 #ifndef SYM_CONF_IOMAPPED 6791 err |= sym_regtest (np); 6792 if (err) return (err); 6793 #endif 6794 restart_test: 6795 /* 6796 * Enable Master Parity Checking as we intend 6797 * to enable it for normal operations. 6798 */ 6799 OUTB (nc_ctest4, (np->rv_ctest4 & MPEE)); 6800 /* 6801 * init 6802 */ 6803 pc = SCRIPTB0_BA (np, snooptest); 6804 host_wr = 1; 6805 sym_wr = 2; 6806 /* 6807 * Set memory and register. 6808 */ 6809 np->cache = cpu_to_scr(host_wr); 6810 OUTL (nc_temp, sym_wr); 6811 /* 6812 * Start script (exchange values) 6813 */ 6814 OUTL (nc_dsa, np->hcb_ba); 6815 OUTL_DSP (pc); 6816 /* 6817 * Wait 'til done (with timeout) 6818 */ 6819 for (i=0; i<SYM_SNOOP_TIMEOUT; i++) 6820 if (INB(nc_istat) & (INTF|SIP|DIP)) 6821 break; 6822 if (i>=SYM_SNOOP_TIMEOUT) { 6823 kprintf ("CACHE TEST FAILED: timeout.\n"); 6824 return (0x20); 6825 } 6826 /* 6827 * Check for fatal DMA errors. 6828 */ 6829 dstat = INB (nc_dstat); 6830 #if 1 /* Band aiding for broken hardwares that fail PCI parity */ 6831 if ((dstat & MDPE) && (np->rv_ctest4 & MPEE)) { 6832 kprintf ("%s: PCI DATA PARITY ERROR DETECTED - " 6833 "DISABLING MASTER DATA PARITY CHECKING.\n", 6834 sym_name(np)); 6835 np->rv_ctest4 &= ~MPEE; 6836 goto restart_test; 6837 } 6838 #endif 6839 if (dstat & (MDPE|BF|IID)) { 6840 kprintf ("CACHE TEST FAILED: DMA error (dstat=0x%02x).", dstat); 6841 return (0x80); 6842 } 6843 /* 6844 * Save termination position. 6845 */ 6846 pc = INL (nc_dsp); 6847 /* 6848 * Read memory and register. 6849 */ 6850 host_rd = scr_to_cpu(np->cache); 6851 sym_rd = INL (nc_scratcha); 6852 sym_bk = INL (nc_temp); 6853 6854 /* 6855 * Check termination position. 6856 */ 6857 if (pc != SCRIPTB0_BA (np, snoopend)+8) { 6858 kprintf ("CACHE TEST FAILED: script execution failed.\n"); 6859 kprintf ("start=%08lx, pc=%08lx, end=%08lx\n", 6860 (u_long) SCRIPTB0_BA (np, snooptest), (u_long) pc, 6861 (u_long) SCRIPTB0_BA (np, snoopend) +8); 6862 return (0x40); 6863 } 6864 /* 6865 * Show results. 6866 */ 6867 if (host_wr != sym_rd) { 6868 kprintf ("CACHE TEST FAILED: host wrote %d, chip read %d.\n", 6869 (int) host_wr, (int) sym_rd); 6870 err |= 1; 6871 } 6872 if (host_rd != sym_wr) { 6873 kprintf ("CACHE TEST FAILED: chip wrote %d, host read %d.\n", 6874 (int) sym_wr, (int) host_rd); 6875 err |= 2; 6876 } 6877 if (sym_bk != sym_wr) { 6878 kprintf ("CACHE TEST FAILED: chip wrote %d, read back %d.\n", 6879 (int) sym_wr, (int) sym_bk); 6880 err |= 4; 6881 } 6882 6883 return (err); 6884 } 6885 6886 /* 6887 * Determine the chip's clock frequency. 6888 * 6889 * This is essential for the negotiation of the synchronous 6890 * transfer rate. 6891 * 6892 * Note: we have to return the correct value. 6893 * THERE IS NO SAFE DEFAULT VALUE. 6894 * 6895 * Most NCR/SYMBIOS boards are delivered with a 40 Mhz clock. 6896 * 53C860 and 53C875 rev. 1 support fast20 transfers but 6897 * do not have a clock doubler and so are provided with a 6898 * 80 MHz clock. All other fast20 boards incorporate a doubler 6899 * and so should be delivered with a 40 MHz clock. 6900 * The recent fast40 chips (895/896/895A/1010) use a 40 Mhz base 6901 * clock and provide a clock quadrupler (160 Mhz). 6902 */ 6903 6904 /* 6905 * Select SCSI clock frequency 6906 */ 6907 static void sym_selectclock(hcb_p np, u_char scntl3) 6908 { 6909 /* 6910 * If multiplier not present or not selected, leave here. 6911 */ 6912 if (np->multiplier <= 1) { 6913 OUTB(nc_scntl3, scntl3); 6914 return; 6915 } 6916 6917 if (sym_verbose >= 2) 6918 kprintf ("%s: enabling clock multiplier\n", sym_name(np)); 6919 6920 OUTB(nc_stest1, DBLEN); /* Enable clock multiplier */ 6921 /* 6922 * Wait for the LCKFRQ bit to be set if supported by the chip. 6923 * Otherwise wait 20 micro-seconds. 6924 */ 6925 if (np->features & FE_LCKFRQ) { 6926 int i = 20; 6927 while (!(INB(nc_stest4) & LCKFRQ) && --i > 0) 6928 UDELAY (20); 6929 if (!i) 6930 kprintf("%s: the chip cannot lock the frequency\n", 6931 sym_name(np)); 6932 } else 6933 UDELAY (20); 6934 OUTB(nc_stest3, HSC); /* Halt the scsi clock */ 6935 OUTB(nc_scntl3, scntl3); 6936 OUTB(nc_stest1, (DBLEN|DBLSEL));/* Select clock multiplier */ 6937 OUTB(nc_stest3, 0x00); /* Restart scsi clock */ 6938 } 6939 6940 /* 6941 * calculate SCSI clock frequency (in KHz) 6942 */ 6943 static unsigned getfreq (hcb_p np, int gen) 6944 { 6945 unsigned int ms = 0; 6946 unsigned int f; 6947 6948 /* 6949 * Measure GEN timer delay in order 6950 * to calculate SCSI clock frequency 6951 * 6952 * This code will never execute too 6953 * many loop iterations (if DELAY is 6954 * reasonably correct). It could get 6955 * too low a delay (too high a freq.) 6956 * if the CPU is slow executing the 6957 * loop for some reason (an NMI, for 6958 * example). For this reason we will 6959 * if multiple measurements are to be 6960 * performed trust the higher delay 6961 * (lower frequency returned). 6962 */ 6963 OUTW (nc_sien , 0); /* mask all scsi interrupts */ 6964 (void) INW (nc_sist); /* clear pending scsi interrupt */ 6965 OUTB (nc_dien , 0); /* mask all dma interrupts */ 6966 (void) INW (nc_sist); /* another one, just to be sure :) */ 6967 OUTB (nc_scntl3, 4); /* set pre-scaler to divide by 3 */ 6968 OUTB (nc_stime1, 0); /* disable general purpose timer */ 6969 OUTB (nc_stime1, gen); /* set to nominal delay of 1<<gen * 125us */ 6970 while (!(INW(nc_sist) & GEN) && ms++ < 100000) 6971 UDELAY (1000); /* count ms */ 6972 OUTB (nc_stime1, 0); /* disable general purpose timer */ 6973 /* 6974 * set prescaler to divide by whatever 0 means 6975 * 0 ought to choose divide by 2, but appears 6976 * to set divide by 3.5 mode in my 53c810 ... 6977 */ 6978 OUTB (nc_scntl3, 0); 6979 6980 /* 6981 * adjust for prescaler, and convert into KHz 6982 */ 6983 f = ms ? ((1 << gen) * 4340) / ms : 0; 6984 6985 if (sym_verbose >= 2) 6986 kprintf ("%s: Delay (GEN=%d): %u msec, %u KHz\n", 6987 sym_name(np), gen, ms, f); 6988 6989 return f; 6990 } 6991 6992 static unsigned sym_getfreq (hcb_p np) 6993 { 6994 u_int f1, f2; 6995 int gen = 11; 6996 6997 (void) getfreq (np, gen); /* throw away first result */ 6998 f1 = getfreq (np, gen); 6999 f2 = getfreq (np, gen); 7000 if (f1 > f2) f1 = f2; /* trust lower result */ 7001 return f1; 7002 } 7003 7004 /* 7005 * Get/probe chip SCSI clock frequency 7006 */ 7007 static void sym_getclock (hcb_p np, int mult) 7008 { 7009 unsigned char scntl3 = np->sv_scntl3; 7010 unsigned char stest1 = np->sv_stest1; 7011 unsigned f1; 7012 7013 /* 7014 * For the C10 core, assume 40 MHz. 7015 */ 7016 if (np->features & FE_C10) { 7017 np->multiplier = mult; 7018 np->clock_khz = 40000 * mult; 7019 return; 7020 } 7021 7022 np->multiplier = 1; 7023 f1 = 40000; 7024 /* 7025 * True with 875/895/896/895A with clock multiplier selected 7026 */ 7027 if (mult > 1 && (stest1 & (DBLEN+DBLSEL)) == DBLEN+DBLSEL) { 7028 if (sym_verbose >= 2) 7029 kprintf ("%s: clock multiplier found\n", sym_name(np)); 7030 np->multiplier = mult; 7031 } 7032 7033 /* 7034 * If multiplier not found or scntl3 not 7,5,3, 7035 * reset chip and get frequency from general purpose timer. 7036 * Otherwise trust scntl3 BIOS setting. 7037 */ 7038 if (np->multiplier != mult || (scntl3 & 7) < 3 || !(scntl3 & 1)) { 7039 OUTB (nc_stest1, 0); /* make sure doubler is OFF */ 7040 f1 = sym_getfreq (np); 7041 7042 if (sym_verbose) 7043 kprintf ("%s: chip clock is %uKHz\n", sym_name(np), f1); 7044 7045 if (f1 < 45000) f1 = 40000; 7046 else if (f1 < 55000) f1 = 50000; 7047 else f1 = 80000; 7048 7049 if (f1 < 80000 && mult > 1) { 7050 if (sym_verbose >= 2) 7051 kprintf ("%s: clock multiplier assumed\n", 7052 sym_name(np)); 7053 np->multiplier = mult; 7054 } 7055 } else { 7056 if ((scntl3 & 7) == 3) f1 = 40000; 7057 else if ((scntl3 & 7) == 5) f1 = 80000; 7058 else f1 = 160000; 7059 7060 f1 /= np->multiplier; 7061 } 7062 7063 /* 7064 * Compute controller synchronous parameters. 7065 */ 7066 f1 *= np->multiplier; 7067 np->clock_khz = f1; 7068 } 7069 7070 /* 7071 * Get/probe PCI clock frequency 7072 */ 7073 static int sym_getpciclock (hcb_p np) 7074 { 7075 int f = 0; 7076 7077 /* 7078 * For the C1010-33, this doesn't work. 7079 * For the C1010-66, this will be tested when I'll have 7080 * such a beast to play with. 7081 */ 7082 if (!(np->features & FE_C10)) { 7083 OUTB (nc_stest1, SCLK); /* Use the PCI clock as SCSI clock */ 7084 f = (int) sym_getfreq (np); 7085 OUTB (nc_stest1, 0); 7086 } 7087 np->pciclk_khz = f; 7088 7089 return f; 7090 } 7091 7092 /*============= DRIVER ACTION/COMPLETION ====================*/ 7093 7094 /* 7095 * Print something that tells about extended errors. 7096 */ 7097 static void sym_print_xerr(ccb_p cp, int x_status) 7098 { 7099 if (x_status & XE_PARITY_ERR) { 7100 PRINT_ADDR(cp); 7101 kprintf ("unrecovered SCSI parity error.\n"); 7102 } 7103 if (x_status & XE_EXTRA_DATA) { 7104 PRINT_ADDR(cp); 7105 kprintf ("extraneous data discarded.\n"); 7106 } 7107 if (x_status & XE_BAD_PHASE) { 7108 PRINT_ADDR(cp); 7109 kprintf ("illegal scsi phase (4/5).\n"); 7110 } 7111 if (x_status & XE_SODL_UNRUN) { 7112 PRINT_ADDR(cp); 7113 kprintf ("ODD transfer in DATA OUT phase.\n"); 7114 } 7115 if (x_status & XE_SWIDE_OVRUN) { 7116 PRINT_ADDR(cp); 7117 kprintf ("ODD transfer in DATA IN phase.\n"); 7118 } 7119 } 7120 7121 /* 7122 * Choose the more appropriate CAM status if 7123 * the IO encountered an extended error. 7124 */ 7125 static int sym_xerr_cam_status(int cam_status, int x_status) 7126 { 7127 if (x_status) { 7128 if (x_status & XE_PARITY_ERR) 7129 cam_status = CAM_UNCOR_PARITY; 7130 else if (x_status &(XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN)) 7131 cam_status = CAM_DATA_RUN_ERR; 7132 else if (x_status & XE_BAD_PHASE) 7133 cam_status = CAM_REQ_CMP_ERR; 7134 else 7135 cam_status = CAM_REQ_CMP_ERR; 7136 } 7137 return cam_status; 7138 } 7139 7140 /* 7141 * Complete execution of a SCSI command with extented 7142 * error, SCSI status error, or having been auto-sensed. 7143 * 7144 * The SCRIPTS processor is not running there, so we 7145 * can safely access IO registers and remove JOBs from 7146 * the START queue. 7147 * SCRATCHA is assumed to have been loaded with STARTPOS 7148 * before the SCRIPTS called the C code. 7149 */ 7150 static void sym_complete_error (hcb_p np, ccb_p cp) 7151 { 7152 struct ccb_scsiio *csio; 7153 u_int cam_status; 7154 int i, sense_returned; 7155 7156 SYM_LOCK_ASSERT(LK_EXCLUSIVE); 7157 7158 /* 7159 * Paranoid check. :) 7160 */ 7161 if (!cp || !cp->cam_ccb) 7162 return; 7163 7164 if (DEBUG_FLAGS & (DEBUG_TINY|DEBUG_RESULT)) { 7165 kprintf ("CCB=%lx STAT=%x/%x/%x DEV=%d/%d\n", (unsigned long)cp, 7166 cp->host_status, cp->ssss_status, cp->host_flags, 7167 cp->target, cp->lun); 7168 MDELAY(100); 7169 } 7170 7171 /* 7172 * Get CAM command pointer. 7173 */ 7174 csio = &cp->cam_ccb->csio; 7175 7176 /* 7177 * Check for extended errors. 7178 */ 7179 if (cp->xerr_status) { 7180 if (sym_verbose) 7181 sym_print_xerr(cp, cp->xerr_status); 7182 if (cp->host_status == HS_COMPLETE) 7183 cp->host_status = HS_COMP_ERR; 7184 } 7185 7186 /* 7187 * Calculate the residual. 7188 */ 7189 csio->sense_resid = 0; 7190 csio->resid = sym_compute_residual(np, cp); 7191 7192 if (!SYM_CONF_RESIDUAL_SUPPORT) {/* If user does not want residuals */ 7193 csio->resid = 0; /* throw them away. :) */ 7194 cp->sv_resid = 0; 7195 } 7196 7197 if (cp->host_flags & HF_SENSE) { /* Auto sense */ 7198 csio->scsi_status = cp->sv_scsi_status; /* Restore status */ 7199 csio->sense_resid = csio->resid; /* Swap residuals */ 7200 csio->resid = cp->sv_resid; 7201 cp->sv_resid = 0; 7202 if (sym_verbose && cp->sv_xerr_status) 7203 sym_print_xerr(cp, cp->sv_xerr_status); 7204 if (cp->host_status == HS_COMPLETE && 7205 cp->ssss_status == S_GOOD && 7206 cp->xerr_status == 0) { 7207 cam_status = sym_xerr_cam_status(CAM_SCSI_STATUS_ERROR, 7208 cp->sv_xerr_status); 7209 cam_status |= CAM_AUTOSNS_VALID; 7210 /* 7211 * Bounce back the sense data to user and 7212 * fix the residual. 7213 */ 7214 bzero(&csio->sense_data, sizeof(csio->sense_data)); 7215 sense_returned = SYM_SNS_BBUF_LEN - csio->sense_resid; 7216 if (sense_returned < csio->sense_len) 7217 csio->sense_resid = csio->sense_len - 7218 sense_returned; 7219 else 7220 csio->sense_resid = 0; 7221 bcopy(cp->sns_bbuf, &csio->sense_data, 7222 MIN(csio->sense_len, sense_returned)); 7223 #if 0 7224 /* 7225 * If the device reports a UNIT ATTENTION condition 7226 * due to a RESET condition, we should consider all 7227 * disconnect CCBs for this unit as aborted. 7228 */ 7229 if (1) { 7230 u_char *p; 7231 p = (u_char *) csio->sense_data; 7232 if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29) 7233 sym_clear_tasks(np, CAM_REQ_ABORTED, 7234 cp->target,cp->lun, -1); 7235 } 7236 #endif 7237 } 7238 else 7239 cam_status = CAM_AUTOSENSE_FAIL; 7240 } 7241 else if (cp->host_status == HS_COMPLETE) { /* Bad SCSI status */ 7242 csio->scsi_status = cp->ssss_status; 7243 cam_status = CAM_SCSI_STATUS_ERROR; 7244 } 7245 else if (cp->host_status == HS_SEL_TIMEOUT) /* Selection timeout */ 7246 cam_status = CAM_SEL_TIMEOUT; 7247 else if (cp->host_status == HS_UNEXPECTED) /* Unexpected BUS FREE*/ 7248 cam_status = CAM_UNEXP_BUSFREE; 7249 else { /* Extended error */ 7250 if (sym_verbose) { 7251 PRINT_ADDR(cp); 7252 kprintf ("COMMAND FAILED (%x %x %x).\n", 7253 cp->host_status, cp->ssss_status, 7254 cp->xerr_status); 7255 } 7256 csio->scsi_status = cp->ssss_status; 7257 /* 7258 * Set the most appropriate value for CAM status. 7259 */ 7260 cam_status = sym_xerr_cam_status(CAM_REQ_CMP_ERR, 7261 cp->xerr_status); 7262 } 7263 7264 /* 7265 * Dequeue all queued CCBs for that device 7266 * not yet started by SCRIPTS. 7267 */ 7268 i = (INL (nc_scratcha) - np->squeue_ba) / 4; 7269 (void) sym_dequeue_from_squeue(np, i, cp->target, cp->lun, -1); 7270 7271 /* 7272 * Restart the SCRIPTS processor. 7273 */ 7274 OUTL_DSP (SCRIPTA_BA (np, start)); 7275 7276 /* 7277 * Synchronize DMA map if needed. 7278 */ 7279 if (cp->dmamapped) { 7280 bus_dmamap_sync(np->data_dmat, cp->dmamap, 7281 (cp->dmamapped == SYM_DMA_READ ? 7282 BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE)); 7283 } 7284 /* 7285 * Add this one to the COMP queue. 7286 * Complete all those commands with either error 7287 * or requeue condition. 7288 */ 7289 sym_set_cam_status((union ccb *) csio, cam_status); 7290 sym_remque(&cp->link_ccbq); 7291 sym_insque_head(&cp->link_ccbq, &np->comp_ccbq); 7292 sym_flush_comp_queue(np, 0); 7293 } 7294 7295 /* 7296 * Complete execution of a successful SCSI command. 7297 * 7298 * Only successful commands go to the DONE queue, 7299 * since we need to have the SCRIPTS processor 7300 * stopped on any error condition. 7301 * The SCRIPTS processor is running while we are 7302 * completing successful commands. 7303 */ 7304 static void sym_complete_ok (hcb_p np, ccb_p cp) 7305 { 7306 struct ccb_scsiio *csio; 7307 tcb_p tp; 7308 lcb_p lp; 7309 7310 SYM_LOCK_ASSERT(LK_EXCLUSIVE); 7311 7312 /* 7313 * Paranoid check. :) 7314 */ 7315 if (!cp || !cp->cam_ccb) 7316 return; 7317 assert (cp->host_status == HS_COMPLETE); 7318 7319 /* 7320 * Get command, target and lun pointers. 7321 */ 7322 csio = &cp->cam_ccb->csio; 7323 tp = &np->target[cp->target]; 7324 lp = sym_lp(np, tp, cp->lun); 7325 7326 /* 7327 * Assume device discovered on first success. 7328 */ 7329 if (!lp) 7330 sym_set_bit(tp->lun_map, cp->lun); 7331 7332 /* 7333 * If all data have been transferred, given than no 7334 * extended error did occur, there is no residual. 7335 */ 7336 csio->resid = 0; 7337 if (cp->phys.head.lastp != cp->phys.head.goalp) 7338 csio->resid = sym_compute_residual(np, cp); 7339 7340 /* 7341 * Wrong transfer residuals may be worse than just always 7342 * returning zero. User can disable this feature from 7343 * sym_conf.h. Residual support is enabled by default. 7344 */ 7345 if (!SYM_CONF_RESIDUAL_SUPPORT) 7346 csio->resid = 0; 7347 7348 /* 7349 * Synchronize DMA map if needed. 7350 */ 7351 if (cp->dmamapped) { 7352 bus_dmamap_sync(np->data_dmat, cp->dmamap, 7353 (cp->dmamapped == SYM_DMA_READ ? 7354 BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE)); 7355 } 7356 /* 7357 * Set status and complete the command. 7358 */ 7359 csio->scsi_status = cp->ssss_status; 7360 sym_set_cam_status((union ccb *) csio, CAM_REQ_CMP); 7361 sym_xpt_done(np, (union ccb *) csio, cp); 7362 sym_free_ccb(np, cp); 7363 } 7364 7365 /* 7366 * Our callout handler 7367 */ 7368 static void sym_callout(void *arg) 7369 { 7370 union ccb *ccb = (union ccb *) arg; 7371 hcb_p np = ccb->ccb_h.sym_hcb_ptr; 7372 7373 /* 7374 * Check that the CAM CCB is still queued. 7375 */ 7376 if (!np) 7377 return; 7378 7379 SYM_LOCK(); 7380 7381 switch(ccb->ccb_h.func_code) { 7382 case XPT_SCSI_IO: 7383 (void) sym_abort_scsiio(np, ccb, 1); 7384 break; 7385 default: 7386 break; 7387 } 7388 7389 SYM_UNLOCK(); 7390 } 7391 7392 /* 7393 * Abort an SCSI IO. 7394 */ 7395 static int sym_abort_scsiio(hcb_p np, union ccb *ccb, int timed_out) 7396 { 7397 ccb_p cp; 7398 SYM_QUEHEAD *qp; 7399 7400 SYM_LOCK_ASSERT(LK_EXCLUSIVE); 7401 7402 /* 7403 * Look up our CCB control block. 7404 */ 7405 cp = NULL; 7406 FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) { 7407 ccb_p cp2 = sym_que_entry(qp, struct sym_ccb, link_ccbq); 7408 if (cp2->cam_ccb == ccb) { 7409 cp = cp2; 7410 break; 7411 } 7412 } 7413 if (!cp || cp->host_status == HS_WAIT) 7414 return -1; 7415 7416 /* 7417 * If a previous abort didn't succeed in time, 7418 * perform a BUS reset. 7419 */ 7420 if (cp->to_abort) { 7421 sym_reset_scsi_bus(np, 1); 7422 return 0; 7423 } 7424 7425 /* 7426 * Mark the CCB for abort and allow time for. 7427 */ 7428 cp->to_abort = timed_out ? 2 : 1; 7429 callout_reset(&cp->ch, 10 * hz, sym_callout, (caddr_t) ccb); 7430 7431 /* 7432 * Tell the SCRIPTS processor to stop and synchronize with us. 7433 */ 7434 np->istat_sem = SEM; 7435 OUTB (nc_istat, SIGP|SEM); 7436 return 0; 7437 } 7438 7439 /* 7440 * Reset a SCSI device (all LUNs of a target). 7441 */ 7442 static void sym_reset_dev(hcb_p np, union ccb *ccb) 7443 { 7444 tcb_p tp; 7445 struct ccb_hdr *ccb_h = &ccb->ccb_h; 7446 7447 SYM_LOCK_ASSERT(LK_EXCLUSIVE); 7448 7449 if (ccb_h->target_id == np->myaddr || 7450 ccb_h->target_id >= SYM_CONF_MAX_TARGET || 7451 ccb_h->target_lun >= SYM_CONF_MAX_LUN) { 7452 sym_xpt_done2(np, ccb, CAM_DEV_NOT_THERE); 7453 return; 7454 } 7455 7456 tp = &np->target[ccb_h->target_id]; 7457 7458 tp->to_reset = 1; 7459 sym_xpt_done2(np, ccb, CAM_REQ_CMP); 7460 7461 np->istat_sem = SEM; 7462 OUTB (nc_istat, SIGP|SEM); 7463 } 7464 7465 /* 7466 * SIM action entry point. 7467 */ 7468 static void sym_action(struct cam_sim *sim, union ccb *ccb) 7469 { 7470 hcb_p np; 7471 tcb_p tp; 7472 lcb_p lp; 7473 ccb_p cp; 7474 int tmp; 7475 u_char idmsg, *msgptr; 7476 u_int msglen; 7477 struct ccb_scsiio *csio; 7478 struct ccb_hdr *ccb_h; 7479 7480 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("sym_action\n")); 7481 7482 /* 7483 * Retrieve our controller data structure. 7484 */ 7485 np = (hcb_p) cam_sim_softc(sim); 7486 7487 SYM_LOCK_ASSERT(LK_EXCLUSIVE); 7488 7489 /* 7490 * The common case is SCSI IO. 7491 * We deal with other ones elsewhere. 7492 */ 7493 if (ccb->ccb_h.func_code != XPT_SCSI_IO) { 7494 sym_action2(sim, ccb); 7495 return; 7496 } 7497 csio = &ccb->csio; 7498 ccb_h = &csio->ccb_h; 7499 7500 /* 7501 * Work around races. 7502 */ 7503 if ((ccb_h->status & CAM_STATUS_MASK) != CAM_REQ_INPROG) { 7504 xpt_done(ccb); 7505 return; 7506 } 7507 7508 /* 7509 * Minimal checkings, so that we will not 7510 * go outside our tables. 7511 */ 7512 if (ccb_h->target_id == np->myaddr || 7513 ccb_h->target_id >= SYM_CONF_MAX_TARGET || 7514 ccb_h->target_lun >= SYM_CONF_MAX_LUN) { 7515 sym_xpt_done2(np, ccb, CAM_DEV_NOT_THERE); 7516 return; 7517 } 7518 7519 /* 7520 * Retrieve the target and lun descriptors. 7521 */ 7522 tp = &np->target[ccb_h->target_id]; 7523 lp = sym_lp(np, tp, ccb_h->target_lun); 7524 7525 /* 7526 * Complete the 1st INQUIRY command with error 7527 * condition if the device is flagged NOSCAN 7528 * at BOOT in the NVRAM. This may speed up 7529 * the boot and maintain coherency with BIOS 7530 * device numbering. Clearing the flag allows 7531 * user to rescan skipped devices later. 7532 * We also return error for devices not flagged 7533 * for SCAN LUNS in the NVRAM since some mono-lun 7534 * devices behave badly when asked for some non 7535 * zero LUN. Btw, this is an absolute hack.:-) 7536 */ 7537 if (!(ccb_h->flags & CAM_CDB_PHYS) && 7538 (0x12 == ((ccb_h->flags & CAM_CDB_POINTER) ? 7539 csio->cdb_io.cdb_ptr[0] : csio->cdb_io.cdb_bytes[0]))) { 7540 if ((tp->usrflags & SYM_SCAN_BOOT_DISABLED) || 7541 ((tp->usrflags & SYM_SCAN_LUNS_DISABLED) && 7542 ccb_h->target_lun != 0)) { 7543 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED; 7544 sym_xpt_done2(np, ccb, CAM_DEV_NOT_THERE); 7545 return; 7546 } 7547 } 7548 7549 /* 7550 * Get a control block for this IO. 7551 */ 7552 tmp = ((ccb_h->flags & CAM_TAG_ACTION_VALID) != 0); 7553 cp = sym_get_ccb(np, ccb_h->target_id, ccb_h->target_lun, tmp); 7554 if (!cp) { 7555 sym_xpt_done2(np, ccb, CAM_RESRC_UNAVAIL); 7556 return; 7557 } 7558 7559 /* 7560 * Keep track of the IO in our CCB. 7561 */ 7562 cp->cam_ccb = ccb; 7563 7564 /* 7565 * Build the IDENTIFY message. 7566 */ 7567 idmsg = M_IDENTIFY | cp->lun; 7568 if (cp->tag != NO_TAG || (lp && (lp->current_flags & SYM_DISC_ENABLED))) 7569 idmsg |= 0x40; 7570 7571 msgptr = cp->scsi_smsg; 7572 msglen = 0; 7573 msgptr[msglen++] = idmsg; 7574 7575 /* 7576 * Build the tag message if present. 7577 */ 7578 if (cp->tag != NO_TAG) { 7579 u_char order = csio->tag_action; 7580 7581 switch(order) { 7582 case M_ORDERED_TAG: 7583 break; 7584 case M_HEAD_TAG: 7585 break; 7586 default: 7587 order = M_SIMPLE_TAG; 7588 } 7589 msgptr[msglen++] = order; 7590 7591 /* 7592 * For less than 128 tags, actual tags are numbered 7593 * 1,3,5,..2*MAXTAGS+1,since we may have to deal 7594 * with devices that have problems with #TAG 0 or too 7595 * great #TAG numbers. For more tags (up to 256), 7596 * we use directly our tag number. 7597 */ 7598 #if SYM_CONF_MAX_TASK > (512/4) 7599 msgptr[msglen++] = cp->tag; 7600 #else 7601 msgptr[msglen++] = (cp->tag << 1) + 1; 7602 #endif 7603 } 7604 7605 /* 7606 * Build a negotiation message if needed. 7607 * (nego_status is filled by sym_prepare_nego()) 7608 */ 7609 cp->nego_status = 0; 7610 if (tp->tinfo.current.width != tp->tinfo.goal.width || 7611 tp->tinfo.current.period != tp->tinfo.goal.period || 7612 tp->tinfo.current.offset != tp->tinfo.goal.offset || 7613 tp->tinfo.current.options != tp->tinfo.goal.options) { 7614 if (!tp->nego_cp && lp) 7615 msglen += sym_prepare_nego(np, cp, 0, msgptr + msglen); 7616 } 7617 7618 /* 7619 * Fill in our ccb 7620 */ 7621 7622 /* 7623 * Startqueue 7624 */ 7625 cp->phys.head.go.start = cpu_to_scr(SCRIPTA_BA (np, select)); 7626 cp->phys.head.go.restart = cpu_to_scr(SCRIPTA_BA (np, resel_dsa)); 7627 7628 /* 7629 * select 7630 */ 7631 cp->phys.select.sel_id = cp->target; 7632 cp->phys.select.sel_scntl3 = tp->head.wval; 7633 cp->phys.select.sel_sxfer = tp->head.sval; 7634 cp->phys.select.sel_scntl4 = tp->head.uval; 7635 7636 /* 7637 * message 7638 */ 7639 cp->phys.smsg.addr = cpu_to_scr(CCB_BA (cp, scsi_smsg)); 7640 cp->phys.smsg.size = cpu_to_scr(msglen); 7641 7642 /* 7643 * command 7644 */ 7645 if (sym_setup_cdb(np, csio, cp) < 0) { 7646 sym_xpt_done(np, ccb, cp); 7647 sym_free_ccb(np, cp); 7648 return; 7649 } 7650 7651 /* 7652 * status 7653 */ 7654 #if 0 /* Provision */ 7655 cp->actualquirks = tp->quirks; 7656 #endif 7657 cp->actualquirks = SYM_QUIRK_AUTOSAVE; 7658 cp->host_status = cp->nego_status ? HS_NEGOTIATE : HS_BUSY; 7659 cp->ssss_status = S_ILLEGAL; 7660 cp->xerr_status = 0; 7661 cp->host_flags = 0; 7662 cp->extra_bytes = 0; 7663 7664 /* 7665 * extreme data pointer. 7666 * shall be positive, so -1 is lower than lowest.:) 7667 */ 7668 cp->ext_sg = -1; 7669 cp->ext_ofs = 0; 7670 7671 /* 7672 * Build the data descriptor block 7673 * and start the IO. 7674 */ 7675 sym_setup_data_and_start(np, csio, cp); 7676 } 7677 7678 /* 7679 * Setup buffers and pointers that address the CDB. 7680 * I bet, physical CDBs will never be used on the planet, 7681 * since they can be bounced without significant overhead. 7682 */ 7683 static int sym_setup_cdb(hcb_p np, struct ccb_scsiio *csio, ccb_p cp) 7684 { 7685 struct ccb_hdr *ccb_h; 7686 u32 cmd_ba; 7687 int cmd_len; 7688 7689 SYM_LOCK_ASSERT(LK_EXCLUSIVE); 7690 7691 ccb_h = &csio->ccb_h; 7692 7693 /* 7694 * CDB is 16 bytes max. 7695 */ 7696 if (csio->cdb_len > sizeof(cp->cdb_buf)) { 7697 sym_set_cam_status(cp->cam_ccb, CAM_REQ_INVALID); 7698 return -1; 7699 } 7700 cmd_len = csio->cdb_len; 7701 7702 if (ccb_h->flags & CAM_CDB_POINTER) { 7703 /* CDB is a pointer */ 7704 if (!(ccb_h->flags & CAM_CDB_PHYS)) { 7705 /* CDB pointer is virtual */ 7706 bcopy(csio->cdb_io.cdb_ptr, cp->cdb_buf, cmd_len); 7707 cmd_ba = CCB_BA (cp, cdb_buf[0]); 7708 } else { 7709 /* CDB pointer is physical */ 7710 #if 0 7711 cmd_ba = ((u32)csio->cdb_io.cdb_ptr) & 0xffffffff; 7712 #else 7713 sym_set_cam_status(cp->cam_ccb, CAM_REQ_INVALID); 7714 return -1; 7715 #endif 7716 } 7717 } else { 7718 /* CDB is in the CAM ccb (buffer) */ 7719 bcopy(csio->cdb_io.cdb_bytes, cp->cdb_buf, cmd_len); 7720 cmd_ba = CCB_BA (cp, cdb_buf[0]); 7721 } 7722 7723 cp->phys.cmd.addr = cpu_to_scr(cmd_ba); 7724 cp->phys.cmd.size = cpu_to_scr(cmd_len); 7725 7726 return 0; 7727 } 7728 7729 /* 7730 * Set up data pointers used by SCRIPTS. 7731 */ 7732 static __inline void 7733 sym_setup_data_pointers(hcb_p np, ccb_p cp, int dir) 7734 { 7735 u32 lastp, goalp; 7736 7737 SYM_LOCK_ASSERT(LK_EXCLUSIVE); 7738 7739 /* 7740 * No segments means no data. 7741 */ 7742 if (!cp->segments) 7743 dir = CAM_DIR_NONE; 7744 7745 /* 7746 * Set the data pointer. 7747 */ 7748 switch(dir) { 7749 case CAM_DIR_OUT: 7750 goalp = SCRIPTA_BA (np, data_out2) + 8; 7751 lastp = goalp - 8 - (cp->segments * (2*4)); 7752 break; 7753 case CAM_DIR_IN: 7754 cp->host_flags |= HF_DATA_IN; 7755 goalp = SCRIPTA_BA (np, data_in2) + 8; 7756 lastp = goalp - 8 - (cp->segments * (2*4)); 7757 break; 7758 case CAM_DIR_NONE: 7759 default: 7760 lastp = goalp = SCRIPTB_BA (np, no_data); 7761 break; 7762 } 7763 7764 cp->phys.head.lastp = cpu_to_scr(lastp); 7765 cp->phys.head.goalp = cpu_to_scr(goalp); 7766 cp->phys.head.savep = cpu_to_scr(lastp); 7767 cp->startp = cp->phys.head.savep; 7768 } 7769 7770 7771 /* 7772 * Call back routine for the DMA map service. 7773 * If bounce buffers are used (why ?), we may sleep and then 7774 * be called there in another context. 7775 */ 7776 static void 7777 sym_execute_ccb(void *arg, bus_dma_segment_t *psegs, int nsegs, int error) 7778 { 7779 ccb_p cp; 7780 hcb_p np; 7781 union ccb *ccb; 7782 7783 cp = (ccb_p) arg; 7784 ccb = cp->cam_ccb; 7785 np = (hcb_p) cp->arg; 7786 7787 SYM_LOCK_ASSERT(LK_EXCLUSIVE); 7788 7789 /* 7790 * Deal with weird races. 7791 */ 7792 if (sym_get_cam_status(ccb) != CAM_REQ_INPROG) 7793 goto out_abort; 7794 7795 /* 7796 * Deal with weird errors. 7797 */ 7798 if (error) { 7799 cp->dmamapped = 0; 7800 sym_set_cam_status(cp->cam_ccb, CAM_REQ_ABORTED); 7801 goto out_abort; 7802 } 7803 7804 /* 7805 * Build the data descriptor for the chip. 7806 */ 7807 if (nsegs) { 7808 int retv; 7809 /* 896 rev 1 requires to be careful about boundaries */ 7810 if (np->device_id == PCI_ID_SYM53C896 && np->revision_id <= 1) 7811 retv = sym_scatter_sg_physical(np, cp, psegs, nsegs); 7812 else 7813 retv = sym_fast_scatter_sg_physical(np,cp, psegs,nsegs); 7814 if (retv < 0) { 7815 sym_set_cam_status(cp->cam_ccb, CAM_REQ_TOO_BIG); 7816 goto out_abort; 7817 } 7818 } 7819 7820 /* 7821 * Synchronize the DMA map only if we have 7822 * actually mapped the data. 7823 */ 7824 if (cp->dmamapped) { 7825 bus_dmamap_sync(np->data_dmat, cp->dmamap, 7826 (cp->dmamapped == SYM_DMA_READ ? 7827 BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE)); 7828 } 7829 7830 /* 7831 * Set host status to busy state. 7832 * May have been set back to HS_WAIT to avoid a race. 7833 */ 7834 cp->host_status = cp->nego_status ? HS_NEGOTIATE : HS_BUSY; 7835 7836 /* 7837 * Set data pointers. 7838 */ 7839 sym_setup_data_pointers(np, cp, (ccb->ccb_h.flags & CAM_DIR_MASK)); 7840 7841 /* 7842 * Enqueue this IO in our pending queue. 7843 */ 7844 sym_enqueue_cam_ccb(cp); 7845 7846 /* 7847 * When `#ifed 1', the code below makes the driver 7848 * panic on the first attempt to write to a SCSI device. 7849 * It is the first test we want to do after a driver 7850 * change that does not seem obviously safe. :) 7851 */ 7852 #if 0 7853 switch (cp->cdb_buf[0]) { 7854 case 0x0A: case 0x2A: case 0xAA: 7855 panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX"); 7856 MDELAY(10000); 7857 break; 7858 default: 7859 break; 7860 } 7861 #endif 7862 /* 7863 * Activate this job. 7864 */ 7865 sym_put_start_queue(np, cp); 7866 return; 7867 out_abort: 7868 sym_xpt_done(np, ccb, cp); 7869 sym_free_ccb(np, cp); 7870 } 7871 7872 /* 7873 * How complex it gets to deal with the data in CAM. 7874 * The Bus Dma stuff makes things still more complex. 7875 */ 7876 static void 7877 sym_setup_data_and_start(hcb_p np, struct ccb_scsiio *csio, ccb_p cp) 7878 { 7879 struct ccb_hdr *ccb_h; 7880 int dir, retv; 7881 7882 SYM_LOCK_ASSERT(LK_EXCLUSIVE); 7883 7884 ccb_h = &csio->ccb_h; 7885 7886 /* 7887 * Now deal with the data. 7888 */ 7889 cp->data_len = csio->dxfer_len; 7890 cp->arg = np; 7891 7892 /* 7893 * No direction means no data. 7894 */ 7895 dir = (ccb_h->flags & CAM_DIR_MASK); 7896 if (dir == CAM_DIR_NONE) { 7897 sym_execute_ccb(cp, NULL, 0, 0); 7898 return; 7899 } 7900 7901 if (!(ccb_h->flags & CAM_SCATTER_VALID)) { 7902 /* Single buffer */ 7903 if (!(ccb_h->flags & CAM_DATA_PHYS)) { 7904 /* Buffer is virtual */ 7905 cp->dmamapped = (dir == CAM_DIR_IN) ? 7906 SYM_DMA_READ : SYM_DMA_WRITE; 7907 retv = bus_dmamap_load(np->data_dmat, cp->dmamap, 7908 csio->data_ptr, csio->dxfer_len, 7909 sym_execute_ccb, cp, 0); 7910 if (retv == EINPROGRESS) { 7911 cp->host_status = HS_WAIT; 7912 xpt_freeze_simq(np->sim, 1); 7913 csio->ccb_h.status |= CAM_RELEASE_SIMQ; 7914 } 7915 } else { 7916 /* Buffer is physical */ 7917 struct bus_dma_segment seg; 7918 7919 seg.ds_addr = (bus_addr_t) csio->data_ptr; 7920 sym_execute_ccb(cp, &seg, 1, 0); 7921 } 7922 } else { 7923 /* Scatter/gather list */ 7924 struct bus_dma_segment *segs; 7925 7926 if ((ccb_h->flags & CAM_SG_LIST_PHYS) != 0) { 7927 /* The SG list pointer is physical */ 7928 sym_set_cam_status(cp->cam_ccb, CAM_REQ_INVALID); 7929 goto out_abort; 7930 } 7931 7932 if (!(ccb_h->flags & CAM_DATA_PHYS)) { 7933 /* SG buffer pointers are virtual */ 7934 sym_set_cam_status(cp->cam_ccb, CAM_REQ_INVALID); 7935 goto out_abort; 7936 } 7937 7938 /* SG buffer pointers are physical */ 7939 segs = (struct bus_dma_segment *)csio->data_ptr; 7940 sym_execute_ccb(cp, segs, csio->sglist_cnt, 0); 7941 } 7942 return; 7943 out_abort: 7944 sym_xpt_done(np, (union ccb *) csio, cp); 7945 sym_free_ccb(np, cp); 7946 } 7947 7948 /* 7949 * Move the scatter list to our data block. 7950 */ 7951 static int 7952 sym_fast_scatter_sg_physical(hcb_p np, ccb_p cp, 7953 bus_dma_segment_t *psegs, int nsegs) 7954 { 7955 struct sym_tblmove *data; 7956 bus_dma_segment_t *psegs2; 7957 7958 SYM_LOCK_ASSERT(LK_EXCLUSIVE); 7959 7960 if (nsegs > SYM_CONF_MAX_SG) 7961 return -1; 7962 7963 data = &cp->phys.data[SYM_CONF_MAX_SG-1]; 7964 psegs2 = &psegs[nsegs-1]; 7965 cp->segments = nsegs; 7966 7967 while (1) { 7968 data->addr = cpu_to_scr(psegs2->ds_addr); 7969 data->size = cpu_to_scr(psegs2->ds_len); 7970 if (DEBUG_FLAGS & DEBUG_SCATTER) { 7971 kprintf ("%s scatter: paddr=%lx len=%ld\n", 7972 sym_name(np), (long) psegs2->ds_addr, 7973 (long) psegs2->ds_len); 7974 } 7975 if (psegs2 != psegs) { 7976 --data; 7977 --psegs2; 7978 continue; 7979 } 7980 break; 7981 } 7982 return 0; 7983 } 7984 7985 7986 /* 7987 * Scatter a SG list with physical addresses into bus addressable chunks. 7988 * We need to ensure 16MB boundaries not to be crossed during DMA of 7989 * each segment, due to some chips being flawed. 7990 */ 7991 #define BOUND_MASK ((1UL<<24)-1) 7992 static int 7993 sym_scatter_sg_physical(hcb_p np, ccb_p cp, bus_dma_segment_t *psegs, int nsegs) 7994 { 7995 u_long ps, pe, pn; 7996 u_long k; 7997 int s, t; 7998 7999 SYM_LOCK_ASSERT(LK_EXCLUSIVE); 8000 8001 s = SYM_CONF_MAX_SG - 1; 8002 t = nsegs - 1; 8003 ps = psegs[t].ds_addr; 8004 pe = ps + psegs[t].ds_len; 8005 8006 while (s >= 0) { 8007 pn = (pe - 1) & ~BOUND_MASK; 8008 if (pn <= ps) 8009 pn = ps; 8010 k = pe - pn; 8011 if (DEBUG_FLAGS & DEBUG_SCATTER) { 8012 kprintf ("%s scatter: paddr=%lx len=%ld\n", 8013 sym_name(np), pn, k); 8014 } 8015 cp->phys.data[s].addr = cpu_to_scr(pn); 8016 cp->phys.data[s].size = cpu_to_scr(k); 8017 --s; 8018 if (pn == ps) { 8019 if (--t < 0) 8020 break; 8021 ps = psegs[t].ds_addr; 8022 pe = ps + psegs[t].ds_len; 8023 } 8024 else 8025 pe = pn; 8026 } 8027 8028 cp->segments = SYM_CONF_MAX_SG - 1 - s; 8029 8030 return t >= 0 ? -1 : 0; 8031 } 8032 #undef BOUND_MASK 8033 8034 /* 8035 * SIM action for non performance critical stuff. 8036 */ 8037 static void sym_action2(struct cam_sim *sim, union ccb *ccb) 8038 { 8039 hcb_p np; 8040 tcb_p tp; 8041 lcb_p lp; 8042 struct ccb_hdr *ccb_h; 8043 8044 /* 8045 * Retrieve our controller data structure. 8046 */ 8047 np = (hcb_p) cam_sim_softc(sim); 8048 8049 SYM_LOCK_ASSERT(LK_EXCLUSIVE); 8050 8051 ccb_h = &ccb->ccb_h; 8052 8053 switch (ccb_h->func_code) { 8054 case XPT_SET_TRAN_SETTINGS: 8055 { 8056 struct ccb_trans_settings *cts; 8057 8058 cts = &ccb->cts; 8059 tp = &np->target[ccb_h->target_id]; 8060 8061 /* 8062 * Update SPI transport settings in TARGET control block. 8063 * Update SCSI device settings in LUN control block. 8064 */ 8065 lp = sym_lp(np, tp, ccb_h->target_lun); 8066 if (cts->type == CTS_TYPE_CURRENT_SETTINGS) { 8067 sym_update_trans(np, tp, &tp->tinfo.goal, cts); 8068 if (lp) 8069 sym_update_dflags(np, &lp->current_flags, cts); 8070 } 8071 if (cts->type == CTS_TYPE_USER_SETTINGS) { 8072 sym_update_trans(np, tp, &tp->tinfo.user, cts); 8073 if (lp) 8074 sym_update_dflags(np, &lp->user_flags, cts); 8075 } 8076 8077 sym_xpt_done2(np, ccb, CAM_REQ_CMP); 8078 break; 8079 } 8080 case XPT_GET_TRAN_SETTINGS: 8081 { 8082 struct ccb_trans_settings *cts; 8083 struct sym_trans *tip; 8084 u_char dflags; 8085 8086 cts = &ccb->cts; 8087 tp = &np->target[ccb_h->target_id]; 8088 lp = sym_lp(np, tp, ccb_h->target_lun); 8089 8090 #define cts__scsi (&cts->proto_specific.scsi) 8091 #define cts__spi (&cts->xport_specific.spi) 8092 if (cts->type == CTS_TYPE_CURRENT_SETTINGS) { 8093 tip = &tp->tinfo.current; 8094 dflags = lp ? lp->current_flags : 0; 8095 } 8096 else { 8097 tip = &tp->tinfo.user; 8098 dflags = lp ? lp->user_flags : tp->usrflags; 8099 } 8100 8101 cts->protocol = PROTO_SCSI; 8102 cts->transport = XPORT_SPI; 8103 cts->protocol_version = tip->scsi_version; 8104 cts->transport_version = tip->spi_version; 8105 8106 cts__spi->sync_period = tip->period; 8107 cts__spi->sync_offset = tip->offset; 8108 cts__spi->bus_width = tip->width; 8109 cts__spi->ppr_options = tip->options; 8110 8111 cts__spi->valid = CTS_SPI_VALID_SYNC_RATE 8112 | CTS_SPI_VALID_SYNC_OFFSET 8113 | CTS_SPI_VALID_BUS_WIDTH 8114 | CTS_SPI_VALID_PPR_OPTIONS; 8115 8116 cts__spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; 8117 if (dflags & SYM_DISC_ENABLED) 8118 cts__spi->flags |= CTS_SPI_FLAGS_DISC_ENB; 8119 cts__spi->valid |= CTS_SPI_VALID_DISC; 8120 8121 cts__scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 8122 if (dflags & SYM_TAGS_ENABLED) 8123 cts__scsi->flags |= CTS_SCSI_FLAGS_TAG_ENB; 8124 cts__scsi->valid |= CTS_SCSI_VALID_TQ; 8125 #undef cts__spi 8126 #undef cts__scsi 8127 sym_xpt_done2(np, ccb, CAM_REQ_CMP); 8128 break; 8129 } 8130 case XPT_CALC_GEOMETRY: 8131 { 8132 cam_calc_geometry(&ccb->ccg, /*extended*/1); 8133 sym_xpt_done2(np, ccb, CAM_REQ_CMP); 8134 break; 8135 } 8136 case XPT_PATH_INQ: 8137 { 8138 struct ccb_pathinq *cpi = &ccb->cpi; 8139 cpi->version_num = 1; 8140 cpi->hba_inquiry = PI_MDP_ABLE|PI_SDTR_ABLE|PI_TAG_ABLE; 8141 if ((np->features & FE_WIDE) != 0) 8142 cpi->hba_inquiry |= PI_WIDE_16; 8143 cpi->target_sprt = 0; 8144 cpi->hba_misc = 0; 8145 if (np->usrflags & SYM_SCAN_TARGETS_HILO) 8146 cpi->hba_misc |= PIM_SCANHILO; 8147 if (np->usrflags & SYM_AVOID_BUS_RESET) 8148 cpi->hba_misc |= PIM_NOBUSRESET; 8149 cpi->hba_eng_cnt = 0; 8150 cpi->max_target = (np->features & FE_WIDE) ? 15 : 7; 8151 /* Semantic problem:)LUN number max = max number of LUNs - 1 */ 8152 cpi->max_lun = SYM_CONF_MAX_LUN-1; 8153 if (SYM_SETUP_MAX_LUN < SYM_CONF_MAX_LUN) 8154 cpi->max_lun = SYM_SETUP_MAX_LUN-1; 8155 cpi->bus_id = cam_sim_bus(sim); 8156 cpi->initiator_id = np->myaddr; 8157 cpi->base_transfer_speed = 3300; 8158 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 8159 strncpy(cpi->hba_vid, "Symbios", HBA_IDLEN); 8160 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN); 8161 cpi->unit_number = cam_sim_unit(sim); 8162 8163 cpi->protocol = PROTO_SCSI; 8164 cpi->protocol_version = SCSI_REV_2; 8165 cpi->transport = XPORT_SPI; 8166 cpi->transport_version = 2; 8167 cpi->xport_specific.spi.ppr_options = SID_SPI_CLOCK_ST; 8168 if (np->features & FE_ULTRA3) { 8169 cpi->transport_version = 3; 8170 cpi->xport_specific.spi.ppr_options = 8171 SID_SPI_CLOCK_DT_ST; 8172 } 8173 sym_xpt_done2(np, ccb, CAM_REQ_CMP); 8174 break; 8175 } 8176 case XPT_ABORT: 8177 { 8178 union ccb *abort_ccb = ccb->cab.abort_ccb; 8179 switch(abort_ccb->ccb_h.func_code) { 8180 case XPT_SCSI_IO: 8181 if (sym_abort_scsiio(np, abort_ccb, 0) == 0) { 8182 sym_xpt_done2(np, ccb, CAM_REQ_CMP); 8183 break; 8184 } 8185 default: 8186 sym_xpt_done2(np, ccb, CAM_UA_ABORT); 8187 break; 8188 } 8189 break; 8190 } 8191 case XPT_RESET_DEV: 8192 { 8193 sym_reset_dev(np, ccb); 8194 break; 8195 } 8196 case XPT_RESET_BUS: 8197 { 8198 sym_reset_scsi_bus(np, 0); 8199 if (sym_verbose) { 8200 xpt_print_path(np->path); 8201 kprintf("SCSI BUS reset delivered.\n"); 8202 } 8203 sym_init (np, 1); 8204 sym_xpt_done2(np, ccb, CAM_REQ_CMP); 8205 break; 8206 } 8207 case XPT_ACCEPT_TARGET_IO: 8208 case XPT_CONT_TARGET_IO: 8209 case XPT_EN_LUN: 8210 case XPT_NOTIFY_ACK: 8211 case XPT_IMMED_NOTIFY: 8212 case XPT_TERM_IO: 8213 default: 8214 sym_xpt_done2(np, ccb, CAM_REQ_INVALID); 8215 break; 8216 } 8217 } 8218 8219 /* 8220 * Asynchronous notification handler. 8221 */ 8222 static void 8223 sym_async(void *cb_arg, u32 code, struct cam_path *path, void *arg) 8224 { 8225 hcb_p np; 8226 struct cam_sim *sim; 8227 u_int tn; 8228 tcb_p tp; 8229 8230 sim = (struct cam_sim *) cb_arg; 8231 np = (hcb_p) cam_sim_softc(sim); 8232 8233 SYM_LOCK_ASSERT(LK_EXCLUSIVE); 8234 8235 switch (code) { 8236 case AC_LOST_DEVICE: 8237 tn = xpt_path_target_id(path); 8238 if (tn >= SYM_CONF_MAX_TARGET) 8239 break; 8240 8241 tp = &np->target[tn]; 8242 8243 tp->to_reset = 0; 8244 tp->head.sval = 0; 8245 tp->head.wval = np->rv_scntl3; 8246 tp->head.uval = 0; 8247 8248 tp->tinfo.current.period = tp->tinfo.goal.period = 0; 8249 tp->tinfo.current.offset = tp->tinfo.goal.offset = 0; 8250 tp->tinfo.current.width = tp->tinfo.goal.width = BUS_8_BIT; 8251 tp->tinfo.current.options = tp->tinfo.goal.options = 0; 8252 8253 break; 8254 default: 8255 break; 8256 } 8257 } 8258 8259 /* 8260 * Update transfer settings of a target. 8261 */ 8262 static void sym_update_trans(hcb_p np, tcb_p tp, struct sym_trans *tip, 8263 struct ccb_trans_settings *cts) 8264 { 8265 SYM_LOCK_ASSERT(LK_EXCLUSIVE); 8266 8267 /* 8268 * Update the infos. 8269 */ 8270 #define cts__spi (&cts->xport_specific.spi) 8271 if ((cts__spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0) 8272 tip->width = cts__spi->bus_width; 8273 if ((cts__spi->valid & CTS_SPI_VALID_SYNC_OFFSET) != 0) 8274 tip->offset = cts__spi->sync_offset; 8275 if ((cts__spi->valid & CTS_SPI_VALID_SYNC_RATE) != 0) 8276 tip->period = cts__spi->sync_period; 8277 if ((cts__spi->valid & CTS_SPI_VALID_PPR_OPTIONS) != 0) 8278 tip->options = (cts__spi->ppr_options & PPR_OPT_DT); 8279 if (cts->protocol_version != PROTO_VERSION_UNSPECIFIED && 8280 cts->protocol_version != PROTO_VERSION_UNKNOWN) 8281 tip->scsi_version = cts->protocol_version; 8282 if (cts->transport_version != XPORT_VERSION_UNSPECIFIED && 8283 cts->transport_version != XPORT_VERSION_UNKNOWN) 8284 tip->spi_version = cts->transport_version; 8285 #undef cts__spi 8286 /* 8287 * Scale against driver configuration limits. 8288 */ 8289 if (tip->width > SYM_SETUP_MAX_WIDE) tip->width = SYM_SETUP_MAX_WIDE; 8290 if (tip->offset > SYM_SETUP_MAX_OFFS) tip->offset = SYM_SETUP_MAX_OFFS; 8291 if (tip->period < SYM_SETUP_MIN_SYNC) tip->period = SYM_SETUP_MIN_SYNC; 8292 8293 /* 8294 * Scale against actual controller BUS width. 8295 */ 8296 if (tip->width > np->maxwide) 8297 tip->width = np->maxwide; 8298 8299 /* 8300 * Only accept DT if controller supports and SYNC/WIDE asked. 8301 */ 8302 if (!((np->features & (FE_C10|FE_ULTRA3)) == (FE_C10|FE_ULTRA3)) || 8303 !(tip->width == BUS_16_BIT && tip->offset)) { 8304 tip->options &= ~PPR_OPT_DT; 8305 } 8306 8307 /* 8308 * Scale period factor and offset against controller limits. 8309 */ 8310 if (tip->options & PPR_OPT_DT) { 8311 if (tip->period < np->minsync_dt) 8312 tip->period = np->minsync_dt; 8313 if (tip->period > np->maxsync_dt) 8314 tip->period = np->maxsync_dt; 8315 if (tip->offset > np->maxoffs_dt) 8316 tip->offset = np->maxoffs_dt; 8317 } 8318 else { 8319 if (tip->period < np->minsync) 8320 tip->period = np->minsync; 8321 if (tip->period > np->maxsync) 8322 tip->period = np->maxsync; 8323 if (tip->offset > np->maxoffs) 8324 tip->offset = np->maxoffs; 8325 } 8326 } 8327 8328 /* 8329 * Update flags for a device (logical unit). 8330 */ 8331 static void 8332 sym_update_dflags(hcb_p np, u_char *flags, struct ccb_trans_settings *cts) 8333 { 8334 SYM_LOCK_ASSERT(LK_EXCLUSIVE); 8335 8336 #define cts__scsi (&cts->proto_specific.scsi) 8337 #define cts__spi (&cts->xport_specific.spi) 8338 if ((cts__spi->valid & CTS_SPI_VALID_DISC) != 0) { 8339 if ((cts__spi->flags & CTS_SPI_FLAGS_DISC_ENB) != 0) 8340 *flags |= SYM_DISC_ENABLED; 8341 else 8342 *flags &= ~SYM_DISC_ENABLED; 8343 } 8344 8345 if ((cts__scsi->valid & CTS_SCSI_VALID_TQ) != 0) { 8346 if ((cts__scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0) 8347 *flags |= SYM_TAGS_ENABLED; 8348 else 8349 *flags &= ~SYM_TAGS_ENABLED; 8350 } 8351 #undef cts__spi 8352 #undef cts__scsi 8353 } 8354 8355 8356 /*============= DRIVER INITIALISATION ==================*/ 8357 8358 8359 static device_method_t sym_pci_methods[] = { 8360 DEVMETHOD(device_probe, sym_pci_probe), 8361 DEVMETHOD(device_attach, sym_pci_attach), 8362 DEVMETHOD_END 8363 }; 8364 8365 static driver_t sym_pci_driver = { 8366 "sym", 8367 sym_pci_methods, 8368 1 /* no softc */ 8369 }; 8370 8371 static devclass_t sym_devclass; 8372 8373 DRIVER_MODULE(sym, pci, sym_pci_driver, sym_devclass, NULL, NULL); 8374 MODULE_VERSION(sym, 1); 8375 MODULE_DEPEND(sym, cam, 1, 1, 1); 8376 MODULE_DEPEND(sym, pci, 1, 1, 1); 8377 8378 8379 static const struct sym_pci_chip sym_pci_dev_table[] = { 8380 {PCI_ID_SYM53C810, 0x0f, "810", 4, 8, 4, 64, 8381 FE_ERL} 8382 , 8383 #ifdef SYM_DEBUG_GENERIC_SUPPORT 8384 {PCI_ID_SYM53C810, 0xff, "810a", 4, 8, 4, 1, 8385 FE_BOF} 8386 , 8387 #else 8388 {PCI_ID_SYM53C810, 0xff, "810a", 4, 8, 4, 1, 8389 FE_CACHE_SET|FE_LDSTR|FE_PFEN|FE_BOF} 8390 , 8391 #endif 8392 {PCI_ID_SYM53C815, 0xff, "815", 4, 8, 4, 64, 8393 FE_BOF|FE_ERL} 8394 , 8395 {PCI_ID_SYM53C825, 0x0f, "825", 6, 8, 4, 64, 8396 FE_WIDE|FE_BOF|FE_ERL|FE_DIFF} 8397 , 8398 {PCI_ID_SYM53C825, 0xff, "825a", 6, 8, 4, 2, 8399 FE_WIDE|FE_CACHE0_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN|FE_RAM|FE_DIFF} 8400 , 8401 {PCI_ID_SYM53C860, 0xff, "860", 4, 8, 5, 1, 8402 FE_ULTRA|FE_CLK80|FE_CACHE_SET|FE_BOF|FE_LDSTR|FE_PFEN} 8403 , 8404 {PCI_ID_SYM53C875, 0x01, "875", 6, 16, 5, 2, 8405 FE_WIDE|FE_ULTRA|FE_CLK80|FE_CACHE0_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN| 8406 FE_RAM|FE_DIFF} 8407 , 8408 {PCI_ID_SYM53C875, 0xff, "875", 6, 16, 5, 2, 8409 FE_WIDE|FE_ULTRA|FE_DBLR|FE_CACHE0_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN| 8410 FE_RAM|FE_DIFF} 8411 , 8412 {PCI_ID_SYM53C875_2, 0xff, "875", 6, 16, 5, 2, 8413 FE_WIDE|FE_ULTRA|FE_DBLR|FE_CACHE0_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN| 8414 FE_RAM|FE_DIFF} 8415 , 8416 {PCI_ID_SYM53C885, 0xff, "885", 6, 16, 5, 2, 8417 FE_WIDE|FE_ULTRA|FE_DBLR|FE_CACHE0_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN| 8418 FE_RAM|FE_DIFF} 8419 , 8420 #ifdef SYM_DEBUG_GENERIC_SUPPORT 8421 {PCI_ID_SYM53C895, 0xff, "895", 6, 31, 7, 2, 8422 FE_WIDE|FE_ULTRA2|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFS| 8423 FE_RAM|FE_LCKFRQ} 8424 , 8425 #else 8426 {PCI_ID_SYM53C895, 0xff, "895", 6, 31, 7, 2, 8427 FE_WIDE|FE_ULTRA2|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN| 8428 FE_RAM|FE_LCKFRQ} 8429 , 8430 #endif 8431 {PCI_ID_SYM53C896, 0xff, "896", 6, 31, 7, 4, 8432 FE_WIDE|FE_ULTRA2|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN| 8433 FE_RAM|FE_RAM8K|FE_64BIT|FE_DAC|FE_IO256|FE_NOPM|FE_LEDC|FE_LCKFRQ} 8434 , 8435 {PCI_ID_SYM53C895A, 0xff, "895a", 6, 31, 7, 4, 8436 FE_WIDE|FE_ULTRA2|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN| 8437 FE_RAM|FE_RAM8K|FE_DAC|FE_IO256|FE_NOPM|FE_LEDC|FE_LCKFRQ} 8438 , 8439 {PCI_ID_LSI53C1010, 0x00, "1010-33", 6, 31, 7, 8, 8440 FE_WIDE|FE_ULTRA3|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFBC|FE_LDSTR|FE_PFEN| 8441 FE_RAM|FE_RAM8K|FE_64BIT|FE_DAC|FE_IO256|FE_NOPM|FE_LEDC|FE_CRC| 8442 FE_C10} 8443 , 8444 {PCI_ID_LSI53C1010, 0xff, "1010-33", 6, 31, 7, 8, 8445 FE_WIDE|FE_ULTRA3|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFBC|FE_LDSTR|FE_PFEN| 8446 FE_RAM|FE_RAM8K|FE_64BIT|FE_DAC|FE_IO256|FE_NOPM|FE_LEDC|FE_CRC| 8447 FE_C10|FE_U3EN} 8448 , 8449 {PCI_ID_LSI53C1010_2, 0xff, "1010-66", 6, 31, 7, 8, 8450 FE_WIDE|FE_ULTRA3|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFBC|FE_LDSTR|FE_PFEN| 8451 FE_RAM|FE_RAM8K|FE_64BIT|FE_DAC|FE_IO256|FE_NOPM|FE_LEDC|FE_66MHZ|FE_CRC| 8452 FE_C10|FE_U3EN} 8453 , 8454 {PCI_ID_LSI53C1510D, 0xff, "1510d", 6, 31, 7, 4, 8455 FE_WIDE|FE_ULTRA2|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN| 8456 FE_RAM|FE_IO256|FE_LEDC} 8457 }; 8458 8459 #define sym_pci_num_devs NELEM(sym_pci_dev_table) 8460 8461 /* 8462 * Look up the chip table. 8463 * 8464 * Return a pointer to the chip entry if found, 8465 * zero otherwise. 8466 */ 8467 static const struct sym_pci_chip * 8468 sym_find_pci_chip(device_t dev) 8469 { 8470 const struct sym_pci_chip *chip; 8471 int i; 8472 u_short device_id; 8473 u_char revision; 8474 8475 if (pci_get_vendor(dev) != PCI_VENDOR_NCR) 8476 return NULL; 8477 8478 device_id = pci_get_device(dev); 8479 revision = pci_get_revid(dev); 8480 8481 for (i = 0; i < sym_pci_num_devs; i++) { 8482 chip = &sym_pci_dev_table[i]; 8483 if (device_id != chip->device_id) 8484 continue; 8485 if (revision > chip->revision_id) 8486 continue; 8487 return chip; 8488 } 8489 8490 return NULL; 8491 } 8492 8493 /* 8494 * Tell upper layer if the chip is supported. 8495 */ 8496 static int 8497 sym_pci_probe(device_t dev) 8498 { 8499 const struct sym_pci_chip *chip; 8500 8501 chip = sym_find_pci_chip(dev); 8502 if (chip && sym_find_firmware(chip)) { 8503 device_set_desc(dev, chip->name); 8504 return (chip->lp_probe_bit & SYM_SETUP_LP_PROBE_MAP)? 8505 BUS_PROBE_LOW_PRIORITY : BUS_PROBE_DEFAULT; 8506 } 8507 return ENXIO; 8508 } 8509 8510 /* 8511 * Attach a sym53c8xx device. 8512 */ 8513 static int 8514 sym_pci_attach(device_t dev) 8515 { 8516 const struct sym_pci_chip *chip; 8517 u_short command; 8518 u_char cachelnsz; 8519 struct sym_hcb *np = NULL; 8520 struct sym_nvram nvram; 8521 const struct sym_fw *fw = NULL; 8522 int i; 8523 bus_dma_tag_t bus_dmat; 8524 8525 #if 0 /* XXX swildner */ 8526 bus_dmat = bus_get_dma_tag(dev); 8527 #else 8528 bus_dmat = NULL; 8529 #endif 8530 8531 /* 8532 * Only probed devices should be attached. 8533 * We just enjoy being paranoid. :) 8534 */ 8535 chip = sym_find_pci_chip(dev); 8536 if (chip == NULL || (fw = sym_find_firmware(chip)) == NULL) 8537 return (ENXIO); 8538 8539 /* 8540 * Allocate immediately the host control block, 8541 * since we are only expecting to succeed. :) 8542 * We keep track in the HCB of all the resources that 8543 * are to be released on error. 8544 */ 8545 np = __sym_calloc_dma(bus_dmat, sizeof(*np), "HCB"); 8546 if (np) 8547 np->bus_dmat = bus_dmat; 8548 else 8549 return (ENXIO); 8550 device_set_softc(dev, np); 8551 8552 SYM_LOCK_INIT(); 8553 8554 /* 8555 * Copy some useful infos to the HCB. 8556 */ 8557 np->hcb_ba = vtobus(np); 8558 np->verbose = bootverbose; 8559 np->device = dev; 8560 np->device_id = pci_get_device(dev); 8561 np->revision_id = pci_get_revid(dev); 8562 np->features = chip->features; 8563 np->clock_divn = chip->nr_divisor; 8564 np->maxoffs = chip->offset_max; 8565 np->maxburst = chip->burst_max; 8566 np->scripta_sz = fw->a_size; 8567 np->scriptb_sz = fw->b_size; 8568 np->fw_setup = fw->setup; 8569 np->fw_patch = fw->patch; 8570 np->fw_name = fw->name; 8571 8572 #ifdef __x86_64__ 8573 np->target = sym_calloc_dma(SYM_CONF_MAX_TARGET * sizeof(*(np->target)), 8574 "TARGET"); 8575 if (!np->target) 8576 goto attach_failed; 8577 #endif 8578 8579 /* 8580 * Initialize the CCB free and busy queues. 8581 */ 8582 sym_que_init(&np->free_ccbq); 8583 sym_que_init(&np->busy_ccbq); 8584 sym_que_init(&np->comp_ccbq); 8585 sym_que_init(&np->cam_ccbq); 8586 8587 /* 8588 * Allocate a tag for the DMA of user data. 8589 */ 8590 if (bus_dma_tag_create(np->bus_dmat, 1, (1<<24), 8591 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, 8592 NULL, NULL, 8593 BUS_SPACE_MAXSIZE, SYM_CONF_MAX_SG, 8594 (1<<24), 0, 8595 &np->data_dmat)) { 8596 device_printf(dev, "failed to create DMA tag.\n"); 8597 goto attach_failed; 8598 } 8599 /* 8600 * Read and apply some fix-ups to the PCI COMMAND 8601 * register. We want the chip to be enabled for: 8602 * - BUS mastering 8603 * - PCI parity checking (reporting would also be fine) 8604 * - Write And Invalidate. 8605 */ 8606 command = pci_read_config(dev, PCIR_COMMAND, 2); 8607 command |= PCIM_CMD_BUSMASTEREN; 8608 command |= PCIM_CMD_PERRESPEN; 8609 command |= /* PCIM_CMD_MWIEN */ 0x0010; 8610 pci_write_config(dev, PCIR_COMMAND, command, 2); 8611 8612 /* 8613 * Let the device know about the cache line size, 8614 * if it doesn't yet. 8615 */ 8616 cachelnsz = pci_read_config(dev, PCIR_CACHELNSZ, 1); 8617 if (!cachelnsz) { 8618 cachelnsz = 8; 8619 pci_write_config(dev, PCIR_CACHELNSZ, cachelnsz, 1); 8620 } 8621 8622 /* 8623 * Alloc/get/map/retrieve everything that deals with MMIO. 8624 */ 8625 if ((command & PCIM_CMD_MEMEN) != 0) { 8626 int regs_id = SYM_PCI_MMIO; 8627 np->mmio_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 8628 ®s_id, RF_ACTIVE); 8629 } 8630 if (!np->mmio_res) { 8631 device_printf(dev, "failed to allocate MMIO resources\n"); 8632 goto attach_failed; 8633 } 8634 np->mmio_ba = rman_get_start(np->mmio_res); 8635 8636 /* 8637 * Allocate the IRQ. 8638 */ 8639 i = 0; 8640 np->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &i, 8641 RF_ACTIVE | RF_SHAREABLE); 8642 if (!np->irq_res) { 8643 device_printf(dev, "failed to allocate IRQ resource\n"); 8644 goto attach_failed; 8645 } 8646 8647 #ifdef SYM_CONF_IOMAPPED 8648 /* 8649 * User want us to use normal IO with PCI. 8650 * Alloc/get/map/retrieve everything that deals with IO. 8651 */ 8652 if ((command & PCI_COMMAND_IO_ENABLE) != 0) { 8653 int regs_id = SYM_PCI_IO; 8654 np->io_res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, 8655 ®s_id, RF_ACTIVE); 8656 } 8657 if (!np->io_res) { 8658 device_printf(dev, "failed to allocate IO resources\n"); 8659 goto attach_failed; 8660 } 8661 8662 #endif /* SYM_CONF_IOMAPPED */ 8663 8664 /* 8665 * If the chip has RAM. 8666 * Alloc/get/map/retrieve the corresponding resources. 8667 */ 8668 if ((np->features & (FE_RAM|FE_RAM8K)) && 8669 (command & PCIM_CMD_MEMEN) != 0) { 8670 int regs_id = SYM_PCI_RAM; 8671 if (np->features & FE_64BIT) 8672 regs_id = SYM_PCI_RAM64; 8673 np->ram_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 8674 ®s_id, RF_ACTIVE); 8675 if (!np->ram_res) { 8676 device_printf(dev,"failed to allocate RAM resources\n"); 8677 goto attach_failed; 8678 } 8679 np->ram_id = regs_id; 8680 np->ram_ba = rman_get_start(np->ram_res); 8681 } 8682 8683 /* 8684 * Save setting of some IO registers, so we will 8685 * be able to probe specific implementations. 8686 */ 8687 sym_save_initial_setting (np); 8688 8689 /* 8690 * Reset the chip now, since it has been reported 8691 * that SCSI clock calibration may not work properly 8692 * if the chip is currently active. 8693 */ 8694 sym_chip_reset (np); 8695 8696 /* 8697 * Try to read the user set-up. 8698 */ 8699 (void) sym_read_nvram(np, &nvram); 8700 8701 /* 8702 * Prepare controller and devices settings, according 8703 * to chip features, user set-up and driver set-up. 8704 */ 8705 (void) sym_prepare_setting(np, &nvram); 8706 8707 /* 8708 * Check the PCI clock frequency. 8709 * Must be performed after prepare_setting since it destroys 8710 * STEST1 that is used to probe for the clock doubler. 8711 */ 8712 i = sym_getpciclock(np); 8713 if (i > 37000) 8714 device_printf(dev, "PCI BUS clock seems too high: %u KHz.\n",i); 8715 8716 /* 8717 * Allocate the start queue. 8718 */ 8719 np->squeue = (u32 *) sym_calloc_dma(sizeof(u32)*(MAX_QUEUE*2),"SQUEUE"); 8720 if (!np->squeue) 8721 goto attach_failed; 8722 np->squeue_ba = vtobus(np->squeue); 8723 8724 /* 8725 * Allocate the done queue. 8726 */ 8727 np->dqueue = (u32 *) sym_calloc_dma(sizeof(u32)*(MAX_QUEUE*2),"DQUEUE"); 8728 if (!np->dqueue) 8729 goto attach_failed; 8730 np->dqueue_ba = vtobus(np->dqueue); 8731 8732 /* 8733 * Allocate the target bus address array. 8734 */ 8735 np->targtbl = (u32 *) sym_calloc_dma(256, "TARGTBL"); 8736 if (!np->targtbl) 8737 goto attach_failed; 8738 np->targtbl_ba = vtobus(np->targtbl); 8739 8740 /* 8741 * Allocate SCRIPTS areas. 8742 */ 8743 np->scripta0 = sym_calloc_dma(np->scripta_sz, "SCRIPTA0"); 8744 np->scriptb0 = sym_calloc_dma(np->scriptb_sz, "SCRIPTB0"); 8745 if (!np->scripta0 || !np->scriptb0) 8746 goto attach_failed; 8747 8748 /* 8749 * Allocate the CCBs. We need at least ONE. 8750 */ 8751 for (i = 0; sym_alloc_ccb(np) != NULL; i++) 8752 ; 8753 if (i < 1) 8754 goto attach_failed; 8755 8756 /* 8757 * Calculate BUS addresses where we are going 8758 * to load the SCRIPTS. 8759 */ 8760 np->scripta_ba = vtobus(np->scripta0); 8761 np->scriptb_ba = vtobus(np->scriptb0); 8762 np->scriptb0_ba = np->scriptb_ba; 8763 8764 if (np->ram_ba) { 8765 np->scripta_ba = np->ram_ba; 8766 if (np->features & FE_RAM8K) { 8767 np->ram_ws = 8192; 8768 np->scriptb_ba = np->scripta_ba + 4096; 8769 #ifdef __LP64__ 8770 np->scr_ram_seg = cpu_to_scr(np->scripta_ba >> 32); 8771 #endif 8772 } 8773 else 8774 np->ram_ws = 4096; 8775 } 8776 8777 /* 8778 * Copy scripts to controller instance. 8779 */ 8780 bcopy(fw->a_base, np->scripta0, np->scripta_sz); 8781 bcopy(fw->b_base, np->scriptb0, np->scriptb_sz); 8782 8783 /* 8784 * Setup variable parts in scripts and compute 8785 * scripts bus addresses used from the C code. 8786 */ 8787 np->fw_setup(np, fw); 8788 8789 /* 8790 * Bind SCRIPTS with physical addresses usable by the 8791 * SCRIPTS processor (as seen from the BUS = BUS addresses). 8792 */ 8793 sym_fw_bind_script(np, (u32 *) np->scripta0, np->scripta_sz); 8794 sym_fw_bind_script(np, (u32 *) np->scriptb0, np->scriptb_sz); 8795 8796 #ifdef SYM_CONF_IARB_SUPPORT 8797 /* 8798 * If user wants IARB to be set when we win arbitration 8799 * and have other jobs, compute the max number of consecutive 8800 * settings of IARB hints before we leave devices a chance to 8801 * arbitrate for reselection. 8802 */ 8803 #ifdef SYM_SETUP_IARB_MAX 8804 np->iarb_max = SYM_SETUP_IARB_MAX; 8805 #else 8806 np->iarb_max = 4; 8807 #endif 8808 #endif 8809 8810 /* 8811 * Prepare the idle and invalid task actions. 8812 */ 8813 np->idletask.start = cpu_to_scr(SCRIPTA_BA (np, idle)); 8814 np->idletask.restart = cpu_to_scr(SCRIPTB_BA (np, bad_i_t_l)); 8815 np->idletask_ba = vtobus(&np->idletask); 8816 8817 np->notask.start = cpu_to_scr(SCRIPTA_BA (np, idle)); 8818 np->notask.restart = cpu_to_scr(SCRIPTB_BA (np, bad_i_t_l)); 8819 np->notask_ba = vtobus(&np->notask); 8820 8821 np->bad_itl.start = cpu_to_scr(SCRIPTA_BA (np, idle)); 8822 np->bad_itl.restart = cpu_to_scr(SCRIPTB_BA (np, bad_i_t_l)); 8823 np->bad_itl_ba = vtobus(&np->bad_itl); 8824 8825 np->bad_itlq.start = cpu_to_scr(SCRIPTA_BA (np, idle)); 8826 np->bad_itlq.restart = cpu_to_scr(SCRIPTB_BA (np,bad_i_t_l_q)); 8827 np->bad_itlq_ba = vtobus(&np->bad_itlq); 8828 8829 /* 8830 * Allocate and prepare the lun JUMP table that is used 8831 * for a target prior the probing of devices (bad lun table). 8832 * A private table will be allocated for the target on the 8833 * first INQUIRY response received. 8834 */ 8835 np->badluntbl = sym_calloc_dma(256, "BADLUNTBL"); 8836 if (!np->badluntbl) 8837 goto attach_failed; 8838 8839 np->badlun_sa = cpu_to_scr(SCRIPTB_BA (np, resel_bad_lun)); 8840 for (i = 0 ; i < 64 ; i++) /* 64 luns/target, no less */ 8841 np->badluntbl[i] = cpu_to_scr(vtobus(&np->badlun_sa)); 8842 8843 /* 8844 * Prepare the bus address array that contains the bus 8845 * address of each target control block. 8846 * For now, assume all logical units are wrong. :) 8847 */ 8848 for (i = 0 ; i < SYM_CONF_MAX_TARGET ; i++) { 8849 np->targtbl[i] = cpu_to_scr(vtobus(&np->target[i])); 8850 np->target[i].head.luntbl_sa = 8851 cpu_to_scr(vtobus(np->badluntbl)); 8852 np->target[i].head.lun0_sa = 8853 cpu_to_scr(vtobus(&np->badlun_sa)); 8854 } 8855 8856 /* 8857 * Now check the cache handling of the pci chipset. 8858 */ 8859 if (sym_snooptest (np)) { 8860 device_printf(dev, "CACHE INCORRECTLY CONFIGURED.\n"); 8861 goto attach_failed; 8862 } 8863 8864 /* 8865 * Now deal with CAM. 8866 * Hopefully, we will succeed with that one.:) 8867 */ 8868 if (!sym_cam_attach(np)) 8869 goto attach_failed; 8870 8871 /* 8872 * Sigh! we are done. 8873 */ 8874 return 0; 8875 8876 /* 8877 * We have failed. 8878 * We will try to free all the resources we have 8879 * allocated, but if we are a boot device, this 8880 * will not help that much.;) 8881 */ 8882 attach_failed: 8883 if (np) 8884 sym_pci_free(np); 8885 return ENXIO; 8886 } 8887 8888 /* 8889 * Free everything that have been allocated for this device. 8890 */ 8891 static void sym_pci_free(hcb_p np) 8892 { 8893 SYM_QUEHEAD *qp; 8894 ccb_p cp; 8895 tcb_p tp; 8896 lcb_p lp; 8897 int target, lun; 8898 8899 /* 8900 * First free CAM resources. 8901 */ 8902 sym_cam_free(np); 8903 8904 /* 8905 * Now every should be quiet for us to 8906 * free other resources. 8907 */ 8908 if (np->ram_res) 8909 bus_release_resource(np->device, SYS_RES_MEMORY, 8910 np->ram_id, np->ram_res); 8911 if (np->mmio_res) 8912 bus_release_resource(np->device, SYS_RES_MEMORY, 8913 SYM_PCI_MMIO, np->mmio_res); 8914 if (np->io_res) 8915 bus_release_resource(np->device, SYS_RES_IOPORT, 8916 SYM_PCI_IO, np->io_res); 8917 if (np->irq_res) 8918 bus_release_resource(np->device, SYS_RES_IRQ, 8919 0, np->irq_res); 8920 8921 if (np->scriptb0) 8922 sym_mfree_dma(np->scriptb0, np->scriptb_sz, "SCRIPTB0"); 8923 if (np->scripta0) 8924 sym_mfree_dma(np->scripta0, np->scripta_sz, "SCRIPTA0"); 8925 if (np->squeue) 8926 sym_mfree_dma(np->squeue, sizeof(u32)*(MAX_QUEUE*2), "SQUEUE"); 8927 if (np->dqueue) 8928 sym_mfree_dma(np->dqueue, sizeof(u32)*(MAX_QUEUE*2), "DQUEUE"); 8929 8930 while ((qp = sym_remque_head(&np->free_ccbq)) != NULL) { 8931 cp = sym_que_entry(qp, struct sym_ccb, link_ccbq); 8932 bus_dmamap_destroy(np->data_dmat, cp->dmamap); 8933 sym_mfree_dma(cp->sns_bbuf, SYM_SNS_BBUF_LEN, "SNS_BBUF"); 8934 sym_mfree_dma(cp, sizeof(*cp), "CCB"); 8935 } 8936 8937 if (np->badluntbl) 8938 sym_mfree_dma(np->badluntbl, 256,"BADLUNTBL"); 8939 8940 for (target = 0; target < SYM_CONF_MAX_TARGET ; target++) { 8941 tp = &np->target[target]; 8942 for (lun = 0 ; lun < SYM_CONF_MAX_LUN ; lun++) { 8943 lp = sym_lp(np, tp, lun); 8944 if (!lp) 8945 continue; 8946 if (lp->itlq_tbl) 8947 sym_mfree_dma(lp->itlq_tbl, SYM_CONF_MAX_TASK*4, 8948 "ITLQ_TBL"); 8949 if (lp->cb_tags) 8950 sym_mfree(lp->cb_tags, SYM_CONF_MAX_TASK, 8951 "CB_TAGS"); 8952 sym_mfree_dma(lp, sizeof(*lp), "LCB"); 8953 } 8954 #if SYM_CONF_MAX_LUN > 1 8955 if (tp->lunmp) 8956 sym_mfree(tp->lunmp, SYM_CONF_MAX_LUN*sizeof(lcb_p), 8957 "LUNMP"); 8958 #endif 8959 } 8960 #ifdef __x86_64__ 8961 if (np->target) 8962 sym_mfree_dma(np->target, 8963 SYM_CONF_MAX_TARGET * sizeof(*(np->target)), "TARGET"); 8964 #endif 8965 if (np->targtbl) 8966 sym_mfree_dma(np->targtbl, 256, "TARGTBL"); 8967 if (np->data_dmat) 8968 bus_dma_tag_destroy(np->data_dmat); 8969 #if 0 /* XXX swildner */ 8970 if (SYM_LOCK_INITIALIZED() != 0) 8971 #endif 8972 SYM_LOCK_DESTROY(); 8973 device_set_softc(np->device, NULL); 8974 sym_mfree_dma(np, sizeof(*np), "HCB"); 8975 } 8976 8977 /* 8978 * Allocate CAM resources and register a bus to CAM. 8979 */ 8980 static int sym_cam_attach(hcb_p np) 8981 { 8982 struct cam_devq *devq = NULL; 8983 struct cam_sim *sim = NULL; 8984 struct cam_path *path = NULL; 8985 int err; 8986 8987 /* 8988 * Establish our interrupt handler. 8989 */ 8990 err = bus_setup_intr(np->device, np->irq_res, 8991 INTR_MPSAFE, 8992 sym_intr, np, &np->intr, NULL); 8993 if (err) { 8994 device_printf(np->device, "bus_setup_intr() failed: %d\n", 8995 err); 8996 goto fail; 8997 } 8998 8999 /* 9000 * Create the device queue for our sym SIM. 9001 */ 9002 devq = cam_simq_alloc(SYM_CONF_MAX_START); 9003 if (!devq) 9004 goto fail; 9005 9006 /* 9007 * Construct our SIM entry. 9008 */ 9009 sim = cam_sim_alloc(sym_action, sym_poll, "sym", np, 9010 device_get_unit(np->device), 9011 &np->lock, 1, SYM_SETUP_MAX_TAG, devq); 9012 cam_simq_release(devq); 9013 if (!sim) 9014 goto fail; 9015 9016 SYM_LOCK(); 9017 9018 if (xpt_bus_register(sim, 0) != CAM_SUCCESS) 9019 goto fail; 9020 np->sim = sim; 9021 9022 if (xpt_create_path(&path, 0, 9023 cam_sim_path(np->sim), CAM_TARGET_WILDCARD, 9024 CAM_LUN_WILDCARD) != CAM_REQ_CMP) { 9025 goto fail; 9026 } 9027 np->path = path; 9028 9029 /* 9030 * Establish our async notification handler. 9031 */ 9032 if (xpt_register_async(AC_LOST_DEVICE, sym_async, sim, path) != 9033 CAM_REQ_CMP) 9034 goto fail; 9035 9036 /* 9037 * Start the chip now, without resetting the BUS, since 9038 * it seems that this must stay under control of CAM. 9039 * With LVD/SE capable chips and BUS in SE mode, we may 9040 * get a spurious SMBC interrupt. 9041 */ 9042 sym_init (np, 0); 9043 9044 SYM_UNLOCK(); 9045 9046 return 1; 9047 fail: 9048 if (sim) 9049 cam_sim_free(sim); 9050 9051 SYM_UNLOCK(); 9052 9053 sym_cam_free(np); 9054 9055 return 0; 9056 } 9057 9058 /* 9059 * Free everything that deals with CAM. 9060 */ 9061 static void sym_cam_free(hcb_p np) 9062 { 9063 SYM_LOCK_ASSERT(0); 9064 9065 if (np->intr) { 9066 bus_teardown_intr(np->device, np->irq_res, np->intr); 9067 np->intr = NULL; 9068 } 9069 9070 SYM_LOCK(); 9071 9072 if (np->sim) { 9073 xpt_bus_deregister(cam_sim_path(np->sim)); 9074 cam_sim_free(np->sim); 9075 np->sim = NULL; 9076 } 9077 if (np->path) { 9078 xpt_free_path(np->path); 9079 np->path = NULL; 9080 } 9081 9082 SYM_UNLOCK(); 9083 } 9084 9085 /*============ OPTIONNAL NVRAM SUPPORT =================*/ 9086 9087 /* 9088 * Get host setup from NVRAM. 9089 */ 9090 static void sym_nvram_setup_host (hcb_p np, struct sym_nvram *nvram) 9091 { 9092 #ifdef SYM_CONF_NVRAM_SUPPORT 9093 /* 9094 * Get parity checking, host ID, verbose mode 9095 * and miscellaneous host flags from NVRAM. 9096 */ 9097 switch(nvram->type) { 9098 case SYM_SYMBIOS_NVRAM: 9099 if (!(nvram->data.Symbios.flags & SYMBIOS_PARITY_ENABLE)) 9100 np->rv_scntl0 &= ~0x0a; 9101 np->myaddr = nvram->data.Symbios.host_id & 0x0f; 9102 if (nvram->data.Symbios.flags & SYMBIOS_VERBOSE_MSGS) 9103 np->verbose += 1; 9104 if (nvram->data.Symbios.flags1 & SYMBIOS_SCAN_HI_LO) 9105 np->usrflags |= SYM_SCAN_TARGETS_HILO; 9106 if (nvram->data.Symbios.flags2 & SYMBIOS_AVOID_BUS_RESET) 9107 np->usrflags |= SYM_AVOID_BUS_RESET; 9108 break; 9109 case SYM_TEKRAM_NVRAM: 9110 np->myaddr = nvram->data.Tekram.host_id & 0x0f; 9111 break; 9112 default: 9113 break; 9114 } 9115 #endif 9116 } 9117 9118 /* 9119 * Get target setup from NVRAM. 9120 */ 9121 #ifdef SYM_CONF_NVRAM_SUPPORT 9122 static void sym_Symbios_setup_target(hcb_p np,int target, Symbios_nvram *nvram); 9123 static void sym_Tekram_setup_target(hcb_p np,int target, Tekram_nvram *nvram); 9124 #endif 9125 9126 static void 9127 sym_nvram_setup_target (hcb_p np, int target, struct sym_nvram *nvp) 9128 { 9129 #ifdef SYM_CONF_NVRAM_SUPPORT 9130 switch(nvp->type) { 9131 case SYM_SYMBIOS_NVRAM: 9132 sym_Symbios_setup_target (np, target, &nvp->data.Symbios); 9133 break; 9134 case SYM_TEKRAM_NVRAM: 9135 sym_Tekram_setup_target (np, target, &nvp->data.Tekram); 9136 break; 9137 default: 9138 break; 9139 } 9140 #endif 9141 } 9142 9143 #ifdef SYM_CONF_NVRAM_SUPPORT 9144 /* 9145 * Get target set-up from Symbios format NVRAM. 9146 */ 9147 static void 9148 sym_Symbios_setup_target(hcb_p np, int target, Symbios_nvram *nvram) 9149 { 9150 tcb_p tp = &np->target[target]; 9151 Symbios_target *tn = &nvram->target[target]; 9152 9153 tp->tinfo.user.period = tn->sync_period ? (tn->sync_period + 3) / 4 : 0; 9154 tp->tinfo.user.width = tn->bus_width == 0x10 ? BUS_16_BIT : BUS_8_BIT; 9155 tp->usrtags = 9156 (tn->flags & SYMBIOS_QUEUE_TAGS_ENABLED)? SYM_SETUP_MAX_TAG : 0; 9157 9158 if (!(tn->flags & SYMBIOS_DISCONNECT_ENABLE)) 9159 tp->usrflags &= ~SYM_DISC_ENABLED; 9160 if (!(tn->flags & SYMBIOS_SCAN_AT_BOOT_TIME)) 9161 tp->usrflags |= SYM_SCAN_BOOT_DISABLED; 9162 if (!(tn->flags & SYMBIOS_SCAN_LUNS)) 9163 tp->usrflags |= SYM_SCAN_LUNS_DISABLED; 9164 } 9165 9166 /* 9167 * Get target set-up from Tekram format NVRAM. 9168 */ 9169 static void 9170 sym_Tekram_setup_target(hcb_p np, int target, Tekram_nvram *nvram) 9171 { 9172 tcb_p tp = &np->target[target]; 9173 struct Tekram_target *tn = &nvram->target[target]; 9174 int i; 9175 9176 if (tn->flags & TEKRAM_SYNC_NEGO) { 9177 i = tn->sync_index & 0xf; 9178 tp->tinfo.user.period = Tekram_sync[i]; 9179 } 9180 9181 tp->tinfo.user.width = 9182 (tn->flags & TEKRAM_WIDE_NEGO) ? BUS_16_BIT : BUS_8_BIT; 9183 9184 if (tn->flags & TEKRAM_TAGGED_COMMANDS) { 9185 tp->usrtags = 2 << nvram->max_tags_index; 9186 } 9187 9188 if (tn->flags & TEKRAM_DISCONNECT_ENABLE) 9189 tp->usrflags |= SYM_DISC_ENABLED; 9190 9191 /* If any device does not support parity, we will not use this option */ 9192 if (!(tn->flags & TEKRAM_PARITY_CHECK)) 9193 np->rv_scntl0 &= ~0x0a; /* SCSI parity checking disabled */ 9194 } 9195 9196 #ifdef SYM_CONF_DEBUG_NVRAM 9197 /* 9198 * Dump Symbios format NVRAM for debugging purpose. 9199 */ 9200 static void sym_display_Symbios_nvram(hcb_p np, Symbios_nvram *nvram) 9201 { 9202 int i; 9203 9204 /* display Symbios nvram host data */ 9205 kprintf("%s: HOST ID=%d%s%s%s%s%s%s\n", 9206 sym_name(np), nvram->host_id & 0x0f, 9207 (nvram->flags & SYMBIOS_SCAM_ENABLE) ? " SCAM" :"", 9208 (nvram->flags & SYMBIOS_PARITY_ENABLE) ? " PARITY" :"", 9209 (nvram->flags & SYMBIOS_VERBOSE_MSGS) ? " VERBOSE" :"", 9210 (nvram->flags & SYMBIOS_CHS_MAPPING) ? " CHS_ALT" :"", 9211 (nvram->flags2 & SYMBIOS_AVOID_BUS_RESET)?" NO_RESET" :"", 9212 (nvram->flags1 & SYMBIOS_SCAN_HI_LO) ? " HI_LO" :""); 9213 9214 /* display Symbios nvram drive data */ 9215 for (i = 0 ; i < 15 ; i++) { 9216 struct Symbios_target *tn = &nvram->target[i]; 9217 kprintf("%s-%d:%s%s%s%s WIDTH=%d SYNC=%d TMO=%d\n", 9218 sym_name(np), i, 9219 (tn->flags & SYMBIOS_DISCONNECT_ENABLE) ? " DISC" : "", 9220 (tn->flags & SYMBIOS_SCAN_AT_BOOT_TIME) ? " SCAN_BOOT" : "", 9221 (tn->flags & SYMBIOS_SCAN_LUNS) ? " SCAN_LUNS" : "", 9222 (tn->flags & SYMBIOS_QUEUE_TAGS_ENABLED)? " TCQ" : "", 9223 tn->bus_width, 9224 tn->sync_period / 4, 9225 tn->timeout); 9226 } 9227 } 9228 9229 /* 9230 * Dump TEKRAM format NVRAM for debugging purpose. 9231 */ 9232 static const u_char Tekram_boot_delay[7] = {3, 5, 10, 20, 30, 60, 120}; 9233 static void sym_display_Tekram_nvram(hcb_p np, Tekram_nvram *nvram) 9234 { 9235 int i, tags, boot_delay; 9236 char *rem; 9237 9238 /* display Tekram nvram host data */ 9239 tags = 2 << nvram->max_tags_index; 9240 boot_delay = 0; 9241 if (nvram->boot_delay_index < 6) 9242 boot_delay = Tekram_boot_delay[nvram->boot_delay_index]; 9243 switch((nvram->flags & TEKRAM_REMOVABLE_FLAGS) >> 6) { 9244 default: 9245 case 0: rem = ""; break; 9246 case 1: rem = " REMOVABLE=boot device"; break; 9247 case 2: rem = " REMOVABLE=all"; break; 9248 } 9249 9250 kprintf("%s: HOST ID=%d%s%s%s%s%s%s%s%s%s BOOT DELAY=%d tags=%d\n", 9251 sym_name(np), nvram->host_id & 0x0f, 9252 (nvram->flags1 & SYMBIOS_SCAM_ENABLE) ? " SCAM" :"", 9253 (nvram->flags & TEKRAM_MORE_THAN_2_DRIVES) ? " >2DRIVES" :"", 9254 (nvram->flags & TEKRAM_DRIVES_SUP_1GB) ? " >1GB" :"", 9255 (nvram->flags & TEKRAM_RESET_ON_POWER_ON) ? " RESET" :"", 9256 (nvram->flags & TEKRAM_ACTIVE_NEGATION) ? " ACT_NEG" :"", 9257 (nvram->flags & TEKRAM_IMMEDIATE_SEEK) ? " IMM_SEEK" :"", 9258 (nvram->flags & TEKRAM_SCAN_LUNS) ? " SCAN_LUNS" :"", 9259 (nvram->flags1 & TEKRAM_F2_F6_ENABLED) ? " F2_F6" :"", 9260 rem, boot_delay, tags); 9261 9262 /* display Tekram nvram drive data */ 9263 for (i = 0; i <= 15; i++) { 9264 int sync, j; 9265 struct Tekram_target *tn = &nvram->target[i]; 9266 j = tn->sync_index & 0xf; 9267 sync = Tekram_sync[j]; 9268 kprintf("%s-%d:%s%s%s%s%s%s PERIOD=%d\n", 9269 sym_name(np), i, 9270 (tn->flags & TEKRAM_PARITY_CHECK) ? " PARITY" : "", 9271 (tn->flags & TEKRAM_SYNC_NEGO) ? " SYNC" : "", 9272 (tn->flags & TEKRAM_DISCONNECT_ENABLE) ? " DISC" : "", 9273 (tn->flags & TEKRAM_START_CMD) ? " START" : "", 9274 (tn->flags & TEKRAM_TAGGED_COMMANDS) ? " TCQ" : "", 9275 (tn->flags & TEKRAM_WIDE_NEGO) ? " WIDE" : "", 9276 sync); 9277 } 9278 } 9279 #endif /* SYM_CONF_DEBUG_NVRAM */ 9280 #endif /* SYM_CONF_NVRAM_SUPPORT */ 9281 9282 9283 /* 9284 * Try reading Symbios or Tekram NVRAM 9285 */ 9286 #ifdef SYM_CONF_NVRAM_SUPPORT 9287 static int sym_read_Symbios_nvram (hcb_p np, Symbios_nvram *nvram); 9288 static int sym_read_Tekram_nvram (hcb_p np, Tekram_nvram *nvram); 9289 #endif 9290 9291 static int sym_read_nvram(hcb_p np, struct sym_nvram *nvp) 9292 { 9293 #ifdef SYM_CONF_NVRAM_SUPPORT 9294 /* 9295 * Try to read SYMBIOS nvram. 9296 * Try to read TEKRAM nvram if Symbios nvram not found. 9297 */ 9298 if (SYM_SETUP_SYMBIOS_NVRAM && 9299 !sym_read_Symbios_nvram (np, &nvp->data.Symbios)) { 9300 nvp->type = SYM_SYMBIOS_NVRAM; 9301 #ifdef SYM_CONF_DEBUG_NVRAM 9302 sym_display_Symbios_nvram(np, &nvp->data.Symbios); 9303 #endif 9304 } 9305 else if (SYM_SETUP_TEKRAM_NVRAM && 9306 !sym_read_Tekram_nvram (np, &nvp->data.Tekram)) { 9307 nvp->type = SYM_TEKRAM_NVRAM; 9308 #ifdef SYM_CONF_DEBUG_NVRAM 9309 sym_display_Tekram_nvram(np, &nvp->data.Tekram); 9310 #endif 9311 } 9312 else 9313 nvp->type = 0; 9314 #else 9315 nvp->type = 0; 9316 #endif 9317 return nvp->type; 9318 } 9319 9320 9321 #ifdef SYM_CONF_NVRAM_SUPPORT 9322 /* 9323 * 24C16 EEPROM reading. 9324 * 9325 * GPOI0 - data in/data out 9326 * GPIO1 - clock 9327 * Symbios NVRAM wiring now also used by Tekram. 9328 */ 9329 9330 #define SET_BIT 0 9331 #define CLR_BIT 1 9332 #define SET_CLK 2 9333 #define CLR_CLK 3 9334 9335 /* 9336 * Set/clear data/clock bit in GPIO0 9337 */ 9338 static void S24C16_set_bit(hcb_p np, u_char write_bit, u_char *gpreg, 9339 int bit_mode) 9340 { 9341 UDELAY (5); 9342 switch (bit_mode){ 9343 case SET_BIT: 9344 *gpreg |= write_bit; 9345 break; 9346 case CLR_BIT: 9347 *gpreg &= 0xfe; 9348 break; 9349 case SET_CLK: 9350 *gpreg |= 0x02; 9351 break; 9352 case CLR_CLK: 9353 *gpreg &= 0xfd; 9354 break; 9355 9356 } 9357 OUTB (nc_gpreg, *gpreg); 9358 UDELAY (5); 9359 } 9360 9361 /* 9362 * Send START condition to NVRAM to wake it up. 9363 */ 9364 static void S24C16_start(hcb_p np, u_char *gpreg) 9365 { 9366 S24C16_set_bit(np, 1, gpreg, SET_BIT); 9367 S24C16_set_bit(np, 0, gpreg, SET_CLK); 9368 S24C16_set_bit(np, 0, gpreg, CLR_BIT); 9369 S24C16_set_bit(np, 0, gpreg, CLR_CLK); 9370 } 9371 9372 /* 9373 * Send STOP condition to NVRAM - puts NVRAM to sleep... ZZzzzz!! 9374 */ 9375 static void S24C16_stop(hcb_p np, u_char *gpreg) 9376 { 9377 S24C16_set_bit(np, 0, gpreg, SET_CLK); 9378 S24C16_set_bit(np, 1, gpreg, SET_BIT); 9379 } 9380 9381 /* 9382 * Read or write a bit to the NVRAM, 9383 * read if GPIO0 input else write if GPIO0 output 9384 */ 9385 static void S24C16_do_bit(hcb_p np, u_char *read_bit, u_char write_bit, 9386 u_char *gpreg) 9387 { 9388 S24C16_set_bit(np, write_bit, gpreg, SET_BIT); 9389 S24C16_set_bit(np, 0, gpreg, SET_CLK); 9390 if (read_bit) 9391 *read_bit = INB (nc_gpreg); 9392 S24C16_set_bit(np, 0, gpreg, CLR_CLK); 9393 S24C16_set_bit(np, 0, gpreg, CLR_BIT); 9394 } 9395 9396 /* 9397 * Output an ACK to the NVRAM after reading, 9398 * change GPIO0 to output and when done back to an input 9399 */ 9400 static void S24C16_write_ack(hcb_p np, u_char write_bit, u_char *gpreg, 9401 u_char *gpcntl) 9402 { 9403 OUTB (nc_gpcntl, *gpcntl & 0xfe); 9404 S24C16_do_bit(np, 0, write_bit, gpreg); 9405 OUTB (nc_gpcntl, *gpcntl); 9406 } 9407 9408 /* 9409 * Input an ACK from NVRAM after writing, 9410 * change GPIO0 to input and when done back to an output 9411 */ 9412 static void S24C16_read_ack(hcb_p np, u_char *read_bit, u_char *gpreg, 9413 u_char *gpcntl) 9414 { 9415 OUTB (nc_gpcntl, *gpcntl | 0x01); 9416 S24C16_do_bit(np, read_bit, 1, gpreg); 9417 OUTB (nc_gpcntl, *gpcntl); 9418 } 9419 9420 /* 9421 * WRITE a byte to the NVRAM and then get an ACK to see it was accepted OK, 9422 * GPIO0 must already be set as an output 9423 */ 9424 static void S24C16_write_byte(hcb_p np, u_char *ack_data, u_char write_data, 9425 u_char *gpreg, u_char *gpcntl) 9426 { 9427 int x; 9428 9429 for (x = 0; x < 8; x++) 9430 S24C16_do_bit(np, 0, (write_data >> (7 - x)) & 0x01, gpreg); 9431 9432 S24C16_read_ack(np, ack_data, gpreg, gpcntl); 9433 } 9434 9435 /* 9436 * READ a byte from the NVRAM and then send an ACK to say we have got it, 9437 * GPIO0 must already be set as an input 9438 */ 9439 static void S24C16_read_byte(hcb_p np, u_char *read_data, u_char ack_data, 9440 u_char *gpreg, u_char *gpcntl) 9441 { 9442 int x; 9443 u_char read_bit; 9444 9445 *read_data = 0; 9446 for (x = 0; x < 8; x++) { 9447 S24C16_do_bit(np, &read_bit, 1, gpreg); 9448 *read_data |= ((read_bit & 0x01) << (7 - x)); 9449 } 9450 9451 S24C16_write_ack(np, ack_data, gpreg, gpcntl); 9452 } 9453 9454 /* 9455 * Read 'len' bytes starting at 'offset'. 9456 */ 9457 static int sym_read_S24C16_nvram (hcb_p np, int offset, u_char *data, int len) 9458 { 9459 u_char gpcntl, gpreg; 9460 u_char old_gpcntl, old_gpreg; 9461 u_char ack_data; 9462 int retv = 1; 9463 int x; 9464 9465 /* save current state of GPCNTL and GPREG */ 9466 old_gpreg = INB (nc_gpreg); 9467 old_gpcntl = INB (nc_gpcntl); 9468 gpcntl = old_gpcntl & 0x1c; 9469 9470 /* set up GPREG & GPCNTL to set GPIO0 and GPIO1 in to known state */ 9471 OUTB (nc_gpreg, old_gpreg); 9472 OUTB (nc_gpcntl, gpcntl); 9473 9474 /* this is to set NVRAM into a known state with GPIO0/1 both low */ 9475 gpreg = old_gpreg; 9476 S24C16_set_bit(np, 0, &gpreg, CLR_CLK); 9477 S24C16_set_bit(np, 0, &gpreg, CLR_BIT); 9478 9479 /* now set NVRAM inactive with GPIO0/1 both high */ 9480 S24C16_stop(np, &gpreg); 9481 9482 /* activate NVRAM */ 9483 S24C16_start(np, &gpreg); 9484 9485 /* write device code and random address MSB */ 9486 S24C16_write_byte(np, &ack_data, 9487 0xa0 | ((offset >> 7) & 0x0e), &gpreg, &gpcntl); 9488 if (ack_data & 0x01) 9489 goto out; 9490 9491 /* write random address LSB */ 9492 S24C16_write_byte(np, &ack_data, 9493 offset & 0xff, &gpreg, &gpcntl); 9494 if (ack_data & 0x01) 9495 goto out; 9496 9497 /* regenerate START state to set up for reading */ 9498 S24C16_start(np, &gpreg); 9499 9500 /* rewrite device code and address MSB with read bit set (lsb = 0x01) */ 9501 S24C16_write_byte(np, &ack_data, 9502 0xa1 | ((offset >> 7) & 0x0e), &gpreg, &gpcntl); 9503 if (ack_data & 0x01) 9504 goto out; 9505 9506 /* now set up GPIO0 for inputting data */ 9507 gpcntl |= 0x01; 9508 OUTB (nc_gpcntl, gpcntl); 9509 9510 /* input all requested data - only part of total NVRAM */ 9511 for (x = 0; x < len; x++) 9512 S24C16_read_byte(np, &data[x], (x == (len-1)), &gpreg, &gpcntl); 9513 9514 /* finally put NVRAM back in inactive mode */ 9515 gpcntl &= 0xfe; 9516 OUTB (nc_gpcntl, gpcntl); 9517 S24C16_stop(np, &gpreg); 9518 retv = 0; 9519 out: 9520 /* return GPIO0/1 to original states after having accessed NVRAM */ 9521 OUTB (nc_gpcntl, old_gpcntl); 9522 OUTB (nc_gpreg, old_gpreg); 9523 9524 return retv; 9525 } 9526 9527 #undef SET_BIT /* 0 */ 9528 #undef CLR_BIT /* 1 */ 9529 #undef SET_CLK /* 2 */ 9530 #undef CLR_CLK /* 3 */ 9531 9532 /* 9533 * Try reading Symbios NVRAM. 9534 * Return 0 if OK. 9535 */ 9536 static int sym_read_Symbios_nvram (hcb_p np, Symbios_nvram *nvram) 9537 { 9538 static u_char Symbios_trailer[6] = {0xfe, 0xfe, 0, 0, 0, 0}; 9539 u_char *data = (u_char *) nvram; 9540 int len = sizeof(*nvram); 9541 u_short csum; 9542 int x; 9543 9544 /* probe the 24c16 and read the SYMBIOS 24c16 area */ 9545 if (sym_read_S24C16_nvram (np, SYMBIOS_NVRAM_ADDRESS, data, len)) 9546 return 1; 9547 9548 /* check valid NVRAM signature, verify byte count and checksum */ 9549 if (nvram->type != 0 || 9550 bcmp(nvram->trailer, Symbios_trailer, 6) || 9551 nvram->byte_count != len - 12) 9552 return 1; 9553 9554 /* verify checksum */ 9555 for (x = 6, csum = 0; x < len - 6; x++) 9556 csum += data[x]; 9557 if (csum != nvram->checksum) 9558 return 1; 9559 9560 return 0; 9561 } 9562 9563 /* 9564 * 93C46 EEPROM reading. 9565 * 9566 * GPOI0 - data in 9567 * GPIO1 - data out 9568 * GPIO2 - clock 9569 * GPIO4 - chip select 9570 * 9571 * Used by Tekram. 9572 */ 9573 9574 /* 9575 * Pulse clock bit in GPIO0 9576 */ 9577 static void T93C46_Clk(hcb_p np, u_char *gpreg) 9578 { 9579 OUTB (nc_gpreg, *gpreg | 0x04); 9580 UDELAY (2); 9581 OUTB (nc_gpreg, *gpreg); 9582 } 9583 9584 /* 9585 * Read bit from NVRAM 9586 */ 9587 static void T93C46_Read_Bit(hcb_p np, u_char *read_bit, u_char *gpreg) 9588 { 9589 UDELAY (2); 9590 T93C46_Clk(np, gpreg); 9591 *read_bit = INB (nc_gpreg); 9592 } 9593 9594 /* 9595 * Write bit to GPIO0 9596 */ 9597 static void T93C46_Write_Bit(hcb_p np, u_char write_bit, u_char *gpreg) 9598 { 9599 if (write_bit & 0x01) 9600 *gpreg |= 0x02; 9601 else 9602 *gpreg &= 0xfd; 9603 9604 *gpreg |= 0x10; 9605 9606 OUTB (nc_gpreg, *gpreg); 9607 UDELAY (2); 9608 9609 T93C46_Clk(np, gpreg); 9610 } 9611 9612 /* 9613 * Send STOP condition to NVRAM - puts NVRAM to sleep... ZZZzzz!! 9614 */ 9615 static void T93C46_Stop(hcb_p np, u_char *gpreg) 9616 { 9617 *gpreg &= 0xef; 9618 OUTB (nc_gpreg, *gpreg); 9619 UDELAY (2); 9620 9621 T93C46_Clk(np, gpreg); 9622 } 9623 9624 /* 9625 * Send read command and address to NVRAM 9626 */ 9627 static void T93C46_Send_Command(hcb_p np, u_short write_data, 9628 u_char *read_bit, u_char *gpreg) 9629 { 9630 int x; 9631 9632 /* send 9 bits, start bit (1), command (2), address (6) */ 9633 for (x = 0; x < 9; x++) 9634 T93C46_Write_Bit(np, (u_char) (write_data >> (8 - x)), gpreg); 9635 9636 *read_bit = INB (nc_gpreg); 9637 } 9638 9639 /* 9640 * READ 2 bytes from the NVRAM 9641 */ 9642 static void T93C46_Read_Word(hcb_p np, u_short *nvram_data, u_char *gpreg) 9643 { 9644 int x; 9645 u_char read_bit; 9646 9647 *nvram_data = 0; 9648 for (x = 0; x < 16; x++) { 9649 T93C46_Read_Bit(np, &read_bit, gpreg); 9650 9651 if (read_bit & 0x01) 9652 *nvram_data |= (0x01 << (15 - x)); 9653 else 9654 *nvram_data &= ~(0x01 << (15 - x)); 9655 } 9656 } 9657 9658 /* 9659 * Read Tekram NvRAM data. 9660 */ 9661 static int T93C46_Read_Data(hcb_p np, u_short *data,int len,u_char *gpreg) 9662 { 9663 u_char read_bit; 9664 int x; 9665 9666 for (x = 0; x < len; x++) { 9667 9668 /* output read command and address */ 9669 T93C46_Send_Command(np, 0x180 | x, &read_bit, gpreg); 9670 if (read_bit & 0x01) 9671 return 1; /* Bad */ 9672 T93C46_Read_Word(np, &data[x], gpreg); 9673 T93C46_Stop(np, gpreg); 9674 } 9675 9676 return 0; 9677 } 9678 9679 /* 9680 * Try reading 93C46 Tekram NVRAM. 9681 */ 9682 static int sym_read_T93C46_nvram (hcb_p np, Tekram_nvram *nvram) 9683 { 9684 u_char gpcntl, gpreg; 9685 u_char old_gpcntl, old_gpreg; 9686 int retv = 1; 9687 9688 /* save current state of GPCNTL and GPREG */ 9689 old_gpreg = INB (nc_gpreg); 9690 old_gpcntl = INB (nc_gpcntl); 9691 9692 /* set up GPREG & GPCNTL to set GPIO0/1/2/4 in to known state, 0 in, 9693 1/2/4 out */ 9694 gpreg = old_gpreg & 0xe9; 9695 OUTB (nc_gpreg, gpreg); 9696 gpcntl = (old_gpcntl & 0xe9) | 0x09; 9697 OUTB (nc_gpcntl, gpcntl); 9698 9699 /* input all of NVRAM, 64 words */ 9700 retv = T93C46_Read_Data(np, (u_short *) nvram, 9701 sizeof(*nvram) / sizeof(short), &gpreg); 9702 9703 /* return GPIO0/1/2/4 to original states after having accessed NVRAM */ 9704 OUTB (nc_gpcntl, old_gpcntl); 9705 OUTB (nc_gpreg, old_gpreg); 9706 9707 return retv; 9708 } 9709 9710 /* 9711 * Try reading Tekram NVRAM. 9712 * Return 0 if OK. 9713 */ 9714 static int sym_read_Tekram_nvram (hcb_p np, Tekram_nvram *nvram) 9715 { 9716 u_char *data = (u_char *) nvram; 9717 int len = sizeof(*nvram); 9718 u_short csum; 9719 int x; 9720 9721 switch (np->device_id) { 9722 case PCI_ID_SYM53C885: 9723 case PCI_ID_SYM53C895: 9724 case PCI_ID_SYM53C896: 9725 x = sym_read_S24C16_nvram(np, TEKRAM_24C16_NVRAM_ADDRESS, 9726 data, len); 9727 break; 9728 case PCI_ID_SYM53C875: 9729 x = sym_read_S24C16_nvram(np, TEKRAM_24C16_NVRAM_ADDRESS, 9730 data, len); 9731 if (!x) 9732 break; 9733 default: 9734 x = sym_read_T93C46_nvram(np, nvram); 9735 break; 9736 } 9737 if (x) 9738 return 1; 9739 9740 /* verify checksum */ 9741 for (x = 0, csum = 0; x < len - 1; x += 2) 9742 csum += data[x] + (data[x+1] << 8); 9743 if (csum != 0x1234) 9744 return 1; 9745 9746 return 0; 9747 } 9748 9749 #endif /* SYM_CONF_NVRAM_SUPPORT */ 9750