1 /* $NetBSD: seagate.c,v 1.70 2009/11/23 02:13:47 rmind Exp $ */ 2 3 /* 4 * ST01/02, Future Domain TMC-885, TMC-950 SCSI driver 5 * 6 * Copyright 1994, Charles M. Hannum (mycroft@ai.mit.edu) 7 * Copyright 1994, Kent Palmkvist (kentp@isy.liu.se) 8 * Copyright 1994, Robert Knier (rknier@qgraph.com) 9 * Copyright 1992, 1994 Drew Eckhardt (drew@colorado.edu) 10 * Copyright 1994, Julian Elischer (julian@tfs.com) 11 * 12 * Others that has contributed by example code is 13 * Glen Overby (overby@cray.com) 14 * Tatu Yllnen 15 * Brian E Litzinger 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions 19 * are met: 20 * 1. Redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer. 22 * 2. Redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE DEVELOPERS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 /* 40 * kentp 940307 alpha version based on newscsi-03 version of Julians SCSI-code 41 * kentp 940314 Added possibility to not use messages 42 * rknier 940331 Added fast transfer code 43 * rknier 940407 Added assembler coded data transfers 44 */ 45 46 /* 47 * What should really be done: 48 * 49 * Add missing tests for timeouts 50 * Restructure interrupt enable/disable code (runs to long with int disabled) 51 * Find bug? giving problem with tape status 52 * Add code to handle Future Domain 840, 841, 880 and 881 53 * adjust timeouts (startup is very slow) 54 * add code to use tagged commands in SCSI2 55 * Add code to handle slow devices better (sleep if device not disconnecting) 56 * Fix unnecessary interrupts 57 */ 58 59 /* 60 * Note to users trying to share a disk between DOS and unix: 61 * The ST01/02 is a translating host-adapter. It is not giving DOS 62 * the same number of heads/tracks/sectors as specified by the disk. 63 * It is therefore important to look at what numbers DOS thinks the 64 * disk has. Use these to disklabel your disk in an appropriate manner 65 */ 66 67 #include <sys/cdefs.h> 68 __KERNEL_RCSID(0, "$NetBSD: seagate.c,v 1.70 2009/11/23 02:13:47 rmind Exp $"); 69 70 #include <sys/param.h> 71 #include <sys/systm.h> 72 #include <sys/kernel.h> 73 #include <sys/errno.h> 74 #include <sys/ioctl.h> 75 #include <sys/device.h> 76 #include <sys/buf.h> 77 #include <sys/proc.h> 78 #include <sys/queue.h> 79 #include <sys/malloc.h> 80 81 #include <sys/intr.h> 82 #include <machine/pio.h> 83 84 #include <dev/scsipi/scsi_all.h> 85 #include <dev/scsipi/scsipi_all.h> 86 #include <dev/scsipi/scsi_message.h> 87 #include <dev/scsipi/scsiconf.h> 88 89 #include <dev/isa/isareg.h> 90 #include <dev/isa/isavar.h> /* XXX USES ISA HOLE DIRECTLY */ 91 92 #define SEA_SCB_MAX 32 /* allow maximally 8 scsi control blocks */ 93 #define SCB_TABLE_SIZE 8 /* start with 8 scb entries in table */ 94 #define BLOCK_SIZE 512 /* size of READ/WRITE areas on SCSI card */ 95 96 /* 97 * defining SEA_BLINDTRANSFER will make DATA IN and DATA OUT to be done with 98 * blind transfers, i.e. no check is done for scsi phase changes. This will 99 * result in data loss if the scsi device does not send its data using 100 * BLOCK_SIZE bytes at a time. 101 * If SEA_BLINDTRANSFER defined and SEA_ASSEMBLER also defined will result in 102 * the use of blind transfers coded in assembler. SEA_ASSEMBLER is no good 103 * without SEA_BLINDTRANSFER defined. 104 */ 105 #define SEA_BLINDTRANSFER /* do blind transfers */ 106 #define SEA_ASSEMBLER /* Use assembly code for fast transfers */ 107 108 /* 109 * defining SEA_NOMSGS causes messages not to be used (thereby disabling 110 * disconnects) 111 */ 112 #undef SEA_NOMSGS 113 114 /* 115 * defining SEA_NODATAOUT makes dataout phase being aborted 116 */ 117 #undef SEA_NODATAOUT 118 119 /* Debugging definitions. Should not be used unless you want a lot of 120 printouts even under normal conditions */ 121 122 #undef SEA_DEBUGQUEUE /* Display info about queue-lengths */ 123 124 /******************************* board definitions **************************/ 125 /* 126 * CONTROL defines 127 */ 128 #define CMD_RST 0x01 /* scsi reset */ 129 #define CMD_SEL 0x02 /* scsi select */ 130 #define CMD_BSY 0x04 /* scsi busy */ 131 #define CMD_ATTN 0x08 /* scsi attention */ 132 #define CMD_START_ARB 0x10 /* start arbitration bit */ 133 #define CMD_EN_PARITY 0x20 /* enable scsi parity generation */ 134 #define CMD_INTR 0x40 /* enable scsi interrupts */ 135 #define CMD_DRVR_ENABLE 0x80 /* scsi enable */ 136 137 /* 138 * STATUS 139 */ 140 #define STAT_BSY 0x01 /* scsi busy */ 141 #define STAT_MSG 0x02 /* scsi msg */ 142 #define STAT_IO 0x04 /* scsi I/O */ 143 #define STAT_CD 0x08 /* scsi C/D */ 144 #define STAT_REQ 0x10 /* scsi req */ 145 #define STAT_SEL 0x20 /* scsi select */ 146 #define STAT_PARITY 0x40 /* parity error bit */ 147 #define STAT_ARB_CMPL 0x80 /* arbitration complete bit */ 148 149 /* 150 * REQUESTS 151 */ 152 #define PH_DATAOUT (0) 153 #define PH_DATAIN (STAT_IO) 154 #define PH_CMD (STAT_CD) 155 #define PH_STAT (STAT_CD | STAT_IO) 156 #define PH_MSGOUT (STAT_MSG | STAT_CD) 157 #define PH_MSGIN (STAT_MSG | STAT_CD | STAT_IO) 158 159 #define PH_MASK (STAT_MSG | STAT_CD | STAT_IO) 160 161 #define PH_INVALID 0xff 162 163 #define SEA_RAMOFFSET 0x00001800 164 165 #define BASE_CMD (CMD_INTR | CMD_EN_PARITY) 166 167 #define SEAGATE 1 /* Seagate ST0[12] */ 168 #define FDOMAIN 2 /* Future Domain TMC-{885,950} */ 169 #define FDOMAIN840 3 /* Future Domain TMC-{84[01],88[01]} */ 170 171 /******************************************************************************/ 172 173 /* scsi control block used to keep info about a scsi command */ 174 struct sea_scb { 175 u_char *data; /* position in data buffer so far */ 176 int datalen; /* bytes remaining to transfer */ 177 TAILQ_ENTRY(sea_scb) chain; 178 struct scsipi_xfer *xs; /* the scsipi_xfer for this cmd */ 179 int flags; /* status of the instruction */ 180 #define SCB_FREE 0 181 #define SCB_ACTIVE 1 182 #define SCB_ABORTED 2 183 #define SCB_TIMEOUT 4 184 #define SCB_ERROR 8 185 }; 186 187 /* 188 * data structure describing current status of the scsi bus. One for each 189 * controller card. 190 */ 191 struct sea_softc { 192 struct device sc_dev; 193 void *sc_ih; 194 195 int type; /* board type */ 196 void * maddr; /* Base address for card */ 197 void * maddr_cr_sr; /* Address of control and status reg */ 198 void * maddr_dr; /* Address of data register */ 199 200 struct scsipi_adapter sc_adapter; 201 struct scsipi_channel sc_channel; 202 203 TAILQ_HEAD(, sea_scb) free_list, ready_list, nexus_list; 204 struct sea_scb *nexus; /* currently connected command */ 205 int numscbs; /* number of scsi control blocks */ 206 struct sea_scb scb[SCB_TABLE_SIZE]; 207 208 int our_id; /* our scsi id */ 209 u_char our_id_mask; 210 volatile u_char busy[8]; /* index=target, bit=lun, Keep track of 211 busy luns at device target */ 212 }; 213 214 /* flag showing if main routine is running. */ 215 static volatile int main_running = 0; 216 217 #define STATUS (*(volatile u_char *)sea->maddr_cr_sr) 218 #define CONTROL STATUS 219 #define DATA (*(volatile u_char *)sea->maddr_dr) 220 221 /* 222 * These are "special" values for the tag parameter passed to sea_select 223 * Not implemented right now. 224 */ 225 #define TAG_NEXT -1 /* Use next free tag */ 226 #define TAG_NONE -2 /* 227 * Establish I_T_L nexus instead of I_T_L_Q 228 * even on SCSI-II devices. 229 */ 230 231 typedef struct { 232 const char *signature; 233 int offset, length; 234 int type; 235 } BiosSignature; 236 237 /* 238 * Signatures for automatic recognition of board type 239 */ 240 static const BiosSignature signatures[] = { 241 {"ST01 v1.7 (C) Copyright 1987 Seagate", 15, 37, SEAGATE}, 242 {"SCSI BIOS 2.00 (C) Copyright 1987 Seagate", 15, 40, SEAGATE}, 243 244 /* 245 * The following two lines are NOT mistakes. One detects ROM revision 246 * 3.0.0, the other 3.2. Since seagate has only one type of SCSI adapter, 247 * and this is not going to change, the "SEAGATE" and "SCSI" together 248 * are probably "good enough" 249 */ 250 {"SEAGATE SCSI BIOS ", 16, 17, SEAGATE}, 251 {"SEAGATE SCSI BIOS ", 17, 17, SEAGATE}, 252 253 /* 254 * However, future domain makes several incompatible SCSI boards, so specific 255 * signatures must be used. 256 */ 257 {"FUTURE DOMAIN CORP. (C) 1986-1989 V5.0C2/14/89", 5, 45, FDOMAIN}, 258 {"FUTURE DOMAIN CORP. (C) 1986-1989 V6.0A7/28/89", 5, 46, FDOMAIN}, 259 {"FUTURE DOMAIN CORP. (C) 1986-1990 V6.0105/31/90",5, 47, FDOMAIN}, 260 {"FUTURE DOMAIN CORP. (C) 1986-1990 V6.0209/18/90",5, 47, FDOMAIN}, 261 {"FUTURE DOMAIN CORP. (C) 1986-1990 V7.009/18/90", 5, 46, FDOMAIN}, 262 {"FUTURE DOMAIN CORP. (C) 1992 V8.00.004/02/92", 5, 44, FDOMAIN}, 263 {"FUTURE DOMAIN TMC-950", 5, 21, FDOMAIN}, 264 }; 265 266 #define nsignatures (sizeof(signatures) / sizeof(signatures[0])) 267 268 #ifdef notdef 269 static const char *bases[] = { 270 (char *) 0xc8000, (char *) 0xca000, (char *) 0xcc000, 271 (char *) 0xce000, (char *) 0xdc000, (char *) 0xde000 272 }; 273 274 #define nbases (sizeof(bases) / sizeof(bases[0])) 275 #endif 276 277 int seaintr(void *); 278 void sea_scsipi_request(struct scsipi_channel *, scsipi_adapter_req_t, void *); 279 void sea_timeout(void *); 280 void sea_done(struct sea_softc *, struct sea_scb *); 281 struct sea_scb *sea_get_scb(struct sea_softc *, int); 282 void sea_free_scb(struct sea_softc *, struct sea_scb *, int); 283 static void sea_main(void); 284 static void sea_information_transfer(struct sea_softc *); 285 int sea_poll(struct sea_softc *, struct scsipi_xfer *, int); 286 void sea_init(struct sea_softc *); 287 void sea_send_scb(struct sea_softc *sea, struct sea_scb *scb); 288 void sea_reselect(struct sea_softc *sea); 289 int sea_select(struct sea_softc *sea, struct sea_scb *scb); 290 int sea_transfer_pio(struct sea_softc *sea, u_char *phase, 291 int *count, u_char **data); 292 int sea_abort(struct sea_softc *, struct sea_scb *scb); 293 294 void sea_grow_scb(struct sea_softc *); 295 296 int seaprobe(device_t, cfdata_t, void *); 297 void seaattach(device_t, device_t, void *); 298 299 CFATTACH_DECL(sea, sizeof(struct sea_softc), 300 seaprobe, seaattach, NULL, NULL); 301 302 extern struct cfdriver sea_cd; 303 304 #ifdef SEA_DEBUGQUEUE 305 void 306 sea_queue_length(struct sea_softc *sea) 307 { 308 struct sea_scb *scb; 309 int connected, issued, disconnected; 310 311 connected = sea->nexus ? 1 : 0; 312 for (scb = sea->ready_list.tqh_first, issued = 0; scb; 313 scb = scb->chain.tqe_next, issued++); 314 for (scb = sea->nexus_list.tqh_first, disconnected = 0; scb; 315 scb = scb->chain.tqe_next, disconnected++); 316 printf("%s: length: %d/%d/%d\n", device_xname(&sea->sc_dev), connected, 317 issued, disconnected); 318 } 319 #endif 320 321 /* 322 * Check if the device can be found at the port given and if so, detect the 323 * type the type of board. Set it up ready for further work. Takes the isa_dev 324 * structure from autoconf as an argument. 325 * Returns 1 if card recognized, 0 if errors. 326 */ 327 int 328 seaprobe(device_t parent, cfdata_t match, void *aux) 329 { 330 struct isa_attach_args *ia = aux; 331 int i, type = 0; 332 void *maddr; 333 334 if (ia->ia_niomem < 1) 335 return (0); 336 if (ia->ia_nirq < 1) 337 return (0); 338 339 if (ISA_DIRECT_CONFIG(ia)) 340 return (0); 341 342 if (ia->ia_iomem[0].ir_addr == ISA_UNKNOWN_IOMEM) 343 return (0); 344 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 345 return (0); 346 347 /* XXX XXX XXX */ 348 maddr = ISA_HOLE_VADDR(ia->ia_iomem[0].ir_addr); 349 350 /* check board type */ /* No way to define this through config */ 351 for (i = 0; i < nsignatures; i++) 352 if (!memcmp((char *)maddr + signatures[i].offset, 353 signatures[i].signature, signatures[i].length)) { 354 type = signatures[i].type; 355 break; 356 } 357 358 /* Find controller and data memory addresses */ 359 switch (type) { 360 case SEAGATE: 361 case FDOMAIN840: 362 case FDOMAIN: 363 break; 364 default: 365 #ifdef SEA_DEBUG 366 printf("seaprobe: board type unknown at address %p\n", maddr); 367 #endif 368 return 0; 369 } 370 371 ia->ia_niomem = 1; 372 ia->ia_iomem[0].ir_size = 0x2000; 373 374 ia->ia_nirq = 1; 375 376 ia->ia_nio = 0; 377 ia->ia_ndrq = 0; 378 379 return 1; 380 } 381 382 /* 383 * Attach all sub-devices we can find 384 */ 385 void 386 seaattach(device_t parent, device_t self, void *aux) 387 { 388 struct isa_attach_args *ia = aux; 389 struct sea_softc *sea = (void *)self; 390 struct scsipi_adapter *adapt = &sea->sc_adapter; 391 struct scsipi_channel *chan = &sea->sc_channel; 392 int i; 393 394 /* XXX XXX XXX */ 395 sea->maddr = ISA_HOLE_VADDR(ia->ia_iomem[0].ir_addr); 396 397 /* check board type */ /* No way to define this through config */ 398 for (i = 0; i < nsignatures; i++) 399 if (!memcmp((char *)sea->maddr + signatures[i].offset, 400 signatures[i].signature, signatures[i].length)) { 401 sea->type = signatures[i].type; 402 break; 403 } 404 405 /* Find controller and data memory addresses */ 406 switch (sea->type) { 407 case SEAGATE: 408 case FDOMAIN840: 409 sea->maddr_cr_sr = 410 (void *) (((u_char *)sea->maddr) + 0x1a00); 411 sea->maddr_dr = 412 (void *) (((u_char *)sea->maddr) + 0x1c00); 413 break; 414 case FDOMAIN: 415 sea->maddr_cr_sr = 416 (void *) (((u_char *)sea->maddr) + 0x1c00); 417 sea->maddr_dr = 418 (void *) (((u_char *)sea->maddr) + 0x1e00); 419 break; 420 default: 421 #ifdef DEBUG 422 printf("%s: board type unknown at address %p\n", 423 device_xname(&sea->sc_dev), sea->maddr); 424 #endif 425 return; 426 } 427 428 /* Test controller RAM (works the same way on future domain cards?) */ 429 *((u_char *)sea->maddr + SEA_RAMOFFSET) = 0xa5; 430 *((u_char *)sea->maddr + SEA_RAMOFFSET + 1) = 0x5a; 431 432 if ((*((u_char *)sea->maddr + SEA_RAMOFFSET) != 0xa5) || 433 (*((u_char *)sea->maddr + SEA_RAMOFFSET + 1) != 0x5a)) { 434 aprint_error_dev(&sea->sc_dev, "board RAM failure\n"); 435 return; 436 } 437 438 sea_init(sea); 439 440 /* 441 * Fill in the scsipi_adapter. 442 */ 443 memset(adapt, 0, sizeof(*adapt)); 444 adapt->adapt_dev = &sea->sc_dev; 445 adapt->adapt_nchannels = 1; 446 adapt->adapt_openings = sea->numscbs; 447 adapt->adapt_max_periph = 1; 448 adapt->adapt_request = sea_scsipi_request; 449 adapt->adapt_minphys = minphys; 450 451 /* 452 * Fill in the scsipi_channel. 453 */ 454 memset(chan, 0, sizeof(*chan)); 455 chan->chan_adapter = adapt; 456 chan->chan_bustype = &scsi_bustype; 457 chan->chan_channel = 0; 458 chan->chan_ntargets = 8; 459 chan->chan_nluns = 8; 460 chan->chan_id = sea->our_id; 461 chan->chan_flags = SCSIPI_CHAN_CANGROW; 462 463 printf("\n"); 464 465 sea->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 466 IST_EDGE, IPL_BIO, seaintr, sea); 467 468 /* 469 * ask the adapter what subunits are present 470 */ 471 config_found(self, &sea->sc_channel, scsiprint); 472 } 473 474 /* 475 * Catch an interrupt from the adaptor 476 */ 477 int 478 seaintr(void *arg) 479 { 480 struct sea_softc *sea = arg; 481 482 #ifdef DEBUG /* extra overhead, and only needed for intr debugging */ 483 if ((STATUS & STAT_PARITY) == 0 && 484 (STATUS & (STAT_SEL | STAT_IO)) != (STAT_SEL | STAT_IO)) 485 return 0; 486 #endif 487 488 loop: 489 /* dispatch to appropriate routine if found and done=0 */ 490 /* should check to see that this card really caused the interrupt */ 491 492 if (STATUS & STAT_PARITY) { 493 /* Parity error interrupt */ 494 aprint_error_dev(&sea->sc_dev, "parity error\n"); 495 return 1; 496 } 497 498 if ((STATUS & (STAT_SEL | STAT_IO)) == (STAT_SEL | STAT_IO)) { 499 /* Reselect interrupt */ 500 sea_reselect(sea); 501 if (!main_running) 502 sea_main(); 503 goto loop; 504 } 505 506 return 1; 507 } 508 509 /* 510 * Setup data structures, and reset the board and the SCSI bus. 511 */ 512 void 513 sea_init(struct sea_softc *sea) 514 { 515 int i; 516 517 /* Reset the scsi bus (I don't know if this is needed */ 518 CONTROL = BASE_CMD | CMD_DRVR_ENABLE | CMD_RST; 519 delay(25); /* hold reset for at least 25 microseconds */ 520 CONTROL = BASE_CMD; 521 delay(10); /* wait a Bus Clear Delay (800 ns + bus free delay (800 ns) */ 522 523 /* Set our id (don't know anything about this) */ 524 switch (sea->type) { 525 case SEAGATE: 526 sea->our_id = 7; 527 break; 528 case FDOMAIN: 529 case FDOMAIN840: 530 sea->our_id = 6; 531 break; 532 } 533 sea->our_id_mask = 1 << sea->our_id; 534 535 /* init fields used by our routines */ 536 sea->nexus = 0; 537 TAILQ_INIT(&sea->ready_list); 538 TAILQ_INIT(&sea->nexus_list); 539 TAILQ_INIT(&sea->free_list); 540 for (i = 0; i < 8; i++) 541 sea->busy[i] = 0x00; 542 543 /* link up the free list of scbs */ 544 sea->numscbs = SCB_TABLE_SIZE; 545 for (i = 0; i < SCB_TABLE_SIZE; i++) { 546 TAILQ_INSERT_TAIL(&sea->free_list, &sea->scb[i], chain); 547 } 548 } 549 550 /* 551 * start a scsi operation given the command and the data address. Also needs 552 * the unit, target and lu. 553 */ 554 void 555 sea_scsipi_request(struct scsipi_channel *chan, scsipi_adapter_req_t req, void *arg) 556 { 557 struct scsipi_xfer *xs; 558 struct scsipi_periph *periph; 559 struct sea_softc *sea = (void *)chan->chan_adapter->adapt_dev; 560 struct sea_scb *scb; 561 int flags; 562 int s; 563 564 switch (req) { 565 case ADAPTER_REQ_RUN_XFER: 566 xs = arg; 567 periph = xs->xs_periph; 568 flags = xs->xs_control; 569 570 SC_DEBUG(periph, SCSIPI_DB2, ("sea_scsipi_requeset\n")); 571 572 /* XXX Reset not implemented. */ 573 if (flags & XS_CTL_RESET) { 574 printf("%s: resetting\n", device_xname(&sea->sc_dev)); 575 xs->error = XS_DRIVER_STUFFUP; 576 scsipi_done(xs); 577 return; 578 } 579 580 /* Get an SCB to use. */ 581 scb = sea_get_scb(sea, flags); 582 #ifdef DIAGNOSTIC 583 /* 584 * This should never happen as we track the resources 585 * in the mid-layer. 586 */ 587 if (scb == NULL) { 588 scsipi_printaddr(periph); 589 printf("unable to allocate scb\n"); 590 panic("sea_scsipi_request"); 591 } 592 #endif 593 594 scb->flags = SCB_ACTIVE; 595 scb->xs = xs; 596 597 /* 598 * Put all the arguments for the xfer in the scb 599 */ 600 scb->datalen = xs->datalen; 601 scb->data = xs->data; 602 603 #ifdef SEA_DEBUGQUEUE 604 sea_queue_length(sea); 605 #endif 606 607 s = splbio(); 608 609 sea_send_scb(sea, scb); 610 611 if ((flags & XS_CTL_POLL) == 0) { 612 callout_reset(&scb->xs->xs_callout, 613 mstohz(xs->timeout), sea_timeout, scb); 614 splx(s); 615 return; 616 } 617 618 splx(s); 619 620 /* 621 * If we can't use interrupts, poll on completion 622 */ 623 if (sea_poll(sea, xs, xs->timeout)) { 624 sea_timeout(scb); 625 if (sea_poll(sea, xs, 2000)) 626 sea_timeout(scb); 627 } 628 return; 629 630 case ADAPTER_REQ_GROW_RESOURCES: 631 sea_grow_scb(sea); 632 return; 633 634 case ADAPTER_REQ_SET_XFER_MODE: 635 { 636 struct scsipi_xfer_mode *xm = arg; 637 638 /* 639 * We don't support sync or wide or tagged queueing, 640 * so announce that now. 641 */ 642 xm->xm_mode = 0; 643 xm->xm_period = 0; 644 xm->xm_offset = 0; 645 scsipi_async_event(chan, ASYNC_EVENT_XFER_MODE, xm); 646 return; 647 } 648 } 649 } 650 651 /* 652 * Get a free scb. If there are none, see if we can allocate a new one. If so, 653 * put it in the hash table too; otherwise return an error or sleep. 654 */ 655 struct sea_scb * 656 sea_get_scb(struct sea_softc *sea, int flags) 657 { 658 int s; 659 struct sea_scb *scb; 660 661 s = splbio(); 662 if ((scb = TAILQ_FIRST(&sea->free_list)) != NULL) 663 TAILQ_REMOVE(&sea->free_list, scb, chain); 664 splx(s); 665 666 return (scb); 667 } 668 669 /* 670 * Try to send this command to the board. Because this board does not use any 671 * mailboxes, this routine simply adds the command to the queue held by the 672 * sea_softc structure. 673 * A check is done to see if the command contains a REQUEST_SENSE command, and 674 * if so the command is put first in the queue, otherwise the command is added 675 * to the end of the queue. ?? Not correct ?? 676 */ 677 void 678 sea_send_scb(struct sea_softc *sea, struct sea_scb *scb) 679 { 680 681 TAILQ_INSERT_TAIL(&sea->ready_list, scb, chain); 682 /* Try to do some work on the card. */ 683 if (!main_running) 684 sea_main(); 685 } 686 687 /* 688 * Coroutine that runs as long as more work can be done on the seagate host 689 * adapter in a system. Both sea_scsi_cmd and sea_intr will try to start it in 690 * case it is not running. 691 */ 692 693 void 694 sea_main(void) 695 { 696 struct sea_softc *sea; 697 struct sea_scb *scb; 698 int done; 699 int unit; 700 int s; 701 702 main_running = 1; 703 704 /* 705 * This should not be run with interrupts disabled, but use the splx 706 * code instead. 707 */ 708 loop: 709 done = 1; 710 for (unit = 0; unit < sea_cd.cd_ndevs; unit++) { 711 sea = device_lookup_private(&sea_cd, unit); 712 if (!sea) 713 continue; 714 s = splbio(); 715 if (!sea->nexus) { 716 /* 717 * Search through the ready_list for a command 718 * destined for a target that's not busy. 719 */ 720 for (scb = sea->ready_list.tqh_first; scb; 721 scb = scb->chain.tqe_next) { 722 if (!(sea->busy[scb->xs->xs_periph->periph_target] & 723 (1 << scb->xs->xs_periph->periph_lun))) { 724 TAILQ_REMOVE(&sea->ready_list, scb, 725 chain); 726 727 /* Re-enable interrupts. */ 728 splx(s); 729 730 /* 731 * Attempt to establish an I_T_L nexus. 732 * On success, sea->nexus is set. 733 * On failure, we must add the command 734 * back to the issue queue so we can 735 * keep trying. 736 */ 737 738 /* 739 * REQUEST_SENSE commands are issued 740 * without tagged queueing, even on 741 * SCSI-II devices because the 742 * contingent alligence condition 743 * exists for the entire unit. 744 */ 745 746 /* 747 * First check that if any device has 748 * tried a reconnect while we have done 749 * other things with interrupts 750 * disabled. 751 */ 752 753 if ((STATUS & (STAT_SEL | STAT_IO)) == 754 (STAT_SEL | STAT_IO)) { 755 sea_reselect(sea); 756 break; 757 } 758 if (sea_select(sea, scb)) { 759 s = splbio(); 760 TAILQ_INSERT_HEAD(&sea->ready_list, 761 scb, chain); 762 splx(s); 763 } else 764 break; 765 } /* if target/lun is not busy */ 766 } /* for scb */ 767 if (!sea->nexus) { 768 /* check for reselection phase */ 769 if ((STATUS & (STAT_SEL | STAT_IO)) == 770 (STAT_SEL | STAT_IO)) { 771 sea_reselect(sea); 772 } 773 } 774 } /* if (!sea->nexus) */ 775 776 splx(s); 777 if (sea->nexus) { /* we are connected. Do the task */ 778 sea_information_transfer(sea); 779 done = 0; 780 } else 781 break; 782 } /* for instance */ 783 784 if (!done) 785 goto loop; 786 787 main_running = 0; 788 } 789 790 /* 791 * Allocate an scb and add it to the free list. 792 * We are called at splbio. 793 */ 794 void 795 sea_grow_scb(struct sea_softc *sea) 796 { 797 struct sea_scb *scb; 798 799 if (sea->numscbs == SEA_SCB_MAX) { 800 sea->sc_channel.chan_flags &= ~SCSIPI_CHAN_CANGROW; 801 return; 802 } 803 804 scb = malloc(sizeof(struct sea_scb), M_DEVBUF, M_NOWAIT|M_ZERO); 805 if (scb == NULL) 806 return; 807 808 TAILQ_INSERT_TAIL(&sea->free_list, scb, chain); 809 sea->numscbs++; 810 sea->sc_adapter.adapt_openings++; 811 } 812 void 813 sea_free_scb(struct sea_softc *sea, struct sea_scb *scb, int flags) 814 { 815 int s; 816 817 s = splbio(); 818 scb->flags = SCB_FREE; 819 TAILQ_INSERT_HEAD(&sea->free_list, scb, chain); 820 splx(s); 821 } 822 823 void 824 sea_timeout(void *arg) 825 { 826 struct sea_scb *scb = arg; 827 struct scsipi_xfer *xs = scb->xs; 828 struct scsipi_periph *periph = xs->xs_periph; 829 struct sea_softc *sea = 830 (void *)periph->periph_channel->chan_adapter->adapt_dev; 831 int s; 832 833 scsipi_printaddr(periph); 834 printf("timed out"); 835 836 s = splbio(); 837 838 /* 839 * If it has been through before, then 840 * a previous abort has failed, don't 841 * try abort again 842 */ 843 if (scb->flags & SCB_ABORTED) { 844 /* abort timed out */ 845 printf(" AGAIN\n"); 846 scb->xs->xs_retries = 0; 847 scb->flags |= SCB_ABORTED; 848 sea_done(sea, scb); 849 } else { 850 /* abort the operation that has timed out */ 851 printf("\n"); 852 scb->flags |= SCB_ABORTED; 853 sea_abort(sea, scb); 854 /* 2 secs for the abort */ 855 if ((xs->xs_control & XS_CTL_POLL) == 0) 856 callout_reset(&scb->xs->xs_callout, 2 * hz, 857 sea_timeout, scb); 858 } 859 860 splx(s); 861 } 862 863 void 864 sea_reselect(struct sea_softc *sea) 865 { 866 u_char target_mask; 867 int i; 868 u_char lun, phase; 869 u_char msg[3]; 870 int len; 871 u_char *data; 872 struct sea_scb *scb; 873 int abort = 0; 874 875 if (!((target_mask = STATUS) & STAT_SEL)) { 876 printf("%s: wrong state 0x%x\n", device_xname(&sea->sc_dev), 877 target_mask); 878 return; 879 } 880 881 /* wait for a device to win the reselection phase */ 882 /* signals this by asserting the I/O signal */ 883 for (i = 10; i && (STATUS & (STAT_SEL | STAT_IO | STAT_BSY)) != 884 (STAT_SEL | STAT_IO | 0); i--); 885 /* !! Check for timeout here */ 886 /* the data bus contains original initiator id ORed with target id */ 887 target_mask = DATA; 888 /* see that we really are the initiator */ 889 if (!(target_mask & sea->our_id_mask)) { 890 printf("%s: polled reselection was not for me: 0x%x\n", 891 device_xname(&sea->sc_dev), target_mask); 892 return; 893 } 894 /* find target who won */ 895 target_mask &= ~sea->our_id_mask; 896 /* host responds by asserting the BSY signal */ 897 CONTROL = BASE_CMD | CMD_DRVR_ENABLE | CMD_BSY; 898 /* target should respond by deasserting the SEL signal */ 899 for (i = 50000; i && (STATUS & STAT_SEL); i++); 900 /* remove the busy status */ 901 CONTROL = BASE_CMD | CMD_DRVR_ENABLE; 902 /* we are connected. Now we wait for the MSGIN condition */ 903 for (i = 50000; i && !(STATUS & STAT_REQ); i--); 904 /* !! Add timeout check here */ 905 /* hope we get an IDENTIFY message */ 906 len = 3; 907 data = msg; 908 phase = PH_MSGIN; 909 sea_transfer_pio(sea, &phase, &len, &data); 910 911 if (!MSG_ISIDENTIFY(msg[0])) { 912 printf("%s: expecting IDENTIFY message, got 0x%x\n", 913 device_xname(&sea->sc_dev), msg[0]); 914 abort = 1; 915 scb = NULL; 916 } else { 917 lun = msg[0] & 0x07; 918 919 /* 920 * Find the command corresponding to the I_T_L or I_T_L_Q nexus 921 * we just reestablished, and remove it from the disconnected 922 * queue. 923 */ 924 for (scb = sea->nexus_list.tqh_first; scb; 925 scb = scb->chain.tqe_next) 926 if (target_mask == (1 << scb->xs->xs_periph->periph_target) && 927 lun == scb->xs->xs_periph->periph_lun) { 928 TAILQ_REMOVE(&sea->nexus_list, scb, 929 chain); 930 break; 931 } 932 if (!scb) { 933 printf("%s: target %02x lun %d not disconnected\n", 934 device_xname(&sea->sc_dev), target_mask, lun); 935 /* 936 * Since we have an established nexus that we can't do 937 * anything with, we must abort it. 938 */ 939 abort = 1; 940 } 941 } 942 943 if (abort) { 944 msg[0] = MSG_ABORT; 945 len = 1; 946 data = msg; 947 phase = PH_MSGOUT; 948 CONTROL = BASE_CMD | CMD_ATTN; 949 sea_transfer_pio(sea, &phase, &len, &data); 950 } else 951 sea->nexus = scb; 952 953 return; 954 } 955 956 /* 957 * Transfer data in given phase using polled I/O. 958 */ 959 int 960 sea_transfer_pio(struct sea_softc *sea, u_char *phase, int *count, u_char **data) 961 { 962 u_char p = *phase, tmp; 963 int c = *count; 964 u_char *d = *data; 965 int timeout; 966 967 do { 968 /* 969 * Wait for assertion of REQ, after which the phase bits will 970 * be valid. 971 */ 972 for (timeout = 0; timeout < 50000; timeout++) 973 if ((tmp = STATUS) & STAT_REQ) 974 break; 975 if (!(tmp & STAT_REQ)) { 976 printf("%s: timeout waiting for STAT_REQ\n", 977 device_xname(&sea->sc_dev)); 978 break; 979 } 980 981 /* 982 * Check for phase mismatch. Reached if the target decides 983 * that it has finished the transfer. 984 */ 985 if (sea->type == FDOMAIN840) 986 tmp = ((tmp & 0x08) >> 2) | 987 ((tmp & 0x02) << 2) | 988 (tmp & 0xf5); 989 if ((tmp & PH_MASK) != p) 990 break; 991 992 /* Do actual transfer from SCSI bus to/from memory. */ 993 if (!(p & STAT_IO)) 994 DATA = *d; 995 else 996 *d = DATA; 997 ++d; 998 999 /* 1000 * The SCSI standard suggests that in MSGOUT phase, the 1001 * initiator should drop ATN on the last byte of the message 1002 * phase after REQ has been asserted for the handshake but 1003 * before the initiator raises ACK. 1004 * Don't know how to accomplish this on the ST01/02. 1005 */ 1006 1007 #if 0 1008 /* 1009 * XXX 1010 * The st01 code doesn't wait for STAT_REQ to be deasserted. 1011 * Is this ok? 1012 */ 1013 for (timeout = 0; timeout < 200000L; timeout++) 1014 if (!(STATUS & STAT_REQ)) 1015 break; 1016 if (STATUS & STAT_REQ) 1017 printf("%s: timeout on wait for !STAT_REQ", 1018 device_xname(&sea->sc_dev)); 1019 #endif 1020 } while (--c); 1021 1022 *count = c; 1023 *data = d; 1024 tmp = STATUS; 1025 if (tmp & STAT_REQ) 1026 *phase = tmp & PH_MASK; 1027 else 1028 *phase = PH_INVALID; 1029 1030 if (c && (*phase != p)) 1031 return -1; 1032 return 0; 1033 } 1034 1035 /* 1036 * Establish I_T_L or I_T_L_Q nexus for new or existing command including 1037 * ARBITRATION, SELECTION, and initial message out for IDENTIFY and queue 1038 * messages. Return -1 if selection could not execute for some reason, 0 if 1039 * selection succeded or failed because the target did not respond. 1040 */ 1041 int 1042 sea_select(struct sea_softc *sea, struct sea_scb *scb) 1043 { 1044 u_char msg[3], phase; 1045 u_char *data; 1046 int len; 1047 int timeout; 1048 1049 CONTROL = BASE_CMD; 1050 DATA = sea->our_id_mask; 1051 CONTROL = (BASE_CMD & ~CMD_INTR) | CMD_START_ARB; 1052 1053 /* wait for arbitration to complete */ 1054 for (timeout = 0; timeout < 3000000L; timeout++) 1055 if (STATUS & STAT_ARB_CMPL) 1056 break; 1057 if (!(STATUS & STAT_ARB_CMPL)) { 1058 if (STATUS & STAT_SEL) { 1059 printf("%s: arbitration lost\n", device_xname(&sea->sc_dev)); 1060 scb->flags |= SCB_ERROR; 1061 } else { 1062 printf("%s: arbitration timeout\n", 1063 device_xname(&sea->sc_dev)); 1064 scb->flags |= SCB_TIMEOUT; 1065 } 1066 CONTROL = BASE_CMD; 1067 return -1; 1068 } 1069 1070 delay(2); 1071 DATA = (u_char)((1 << scb->xs->xs_periph->periph_target) | 1072 sea->our_id_mask); 1073 CONTROL = 1074 #ifdef SEA_NOMSGS 1075 (BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE | CMD_SEL; 1076 #else 1077 (BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE | CMD_SEL | CMD_ATTN; 1078 #endif 1079 delay(1); 1080 1081 /* wait for a bsy from target */ 1082 for (timeout = 0; timeout < 2000000L; timeout++) 1083 if (STATUS & STAT_BSY) 1084 break; 1085 if (!(STATUS & STAT_BSY)) { 1086 /* should return some error to the higher level driver */ 1087 CONTROL = BASE_CMD; 1088 scb->flags |= SCB_TIMEOUT; 1089 return 0; 1090 } 1091 1092 /* Try to make the target to take a message from us */ 1093 #ifdef SEA_NOMSGS 1094 CONTROL = (BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE; 1095 #else 1096 CONTROL = (BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE | CMD_ATTN; 1097 #endif 1098 delay(1); 1099 1100 /* should start a msg_out phase */ 1101 for (timeout = 0; timeout < 2000000L; timeout++) 1102 if (STATUS & STAT_REQ) 1103 break; 1104 /* Remove ATN. */ 1105 CONTROL = BASE_CMD | CMD_DRVR_ENABLE; 1106 if (!(STATUS & STAT_REQ)) { 1107 /* 1108 * This should not be taken as an error, but more like an 1109 * unsupported feature! Should set a flag indicating that the 1110 * target don't support messages, and continue without failure. 1111 * (THIS IS NOT AN ERROR!) 1112 */ 1113 } else { 1114 msg[0] = MSG_IDENTIFY(scb->xs->xs_periph->periph_lun, 1); 1115 len = 1; 1116 data = msg; 1117 phase = PH_MSGOUT; 1118 /* Should do test on result of sea_transfer_pio(). */ 1119 sea_transfer_pio(sea, &phase, &len, &data); 1120 } 1121 if (!(STATUS & STAT_BSY)) 1122 printf("%s: after successful arbitrate: no STAT_BSY!\n", 1123 device_xname(&sea->sc_dev)); 1124 1125 sea->nexus = scb; 1126 sea->busy[scb->xs->xs_periph->periph_target] |= 1127 1 << scb->xs->xs_periph->periph_lun; 1128 /* This assignment should depend on possibility to send a message to target. */ 1129 CONTROL = BASE_CMD | CMD_DRVR_ENABLE; 1130 /* XXX Reset pointer in command? */ 1131 return 0; 1132 } 1133 1134 /* 1135 * Send an abort to the target. Return 1 success, 0 on failure. 1136 */ 1137 int 1138 sea_abort(struct sea_softc *sea, struct sea_scb *scb) 1139 { 1140 struct sea_scb *tmp; 1141 u_char msg, phase, *msgptr; 1142 int len; 1143 1144 /* 1145 * If the command hasn't been issued yet, we simply remove it from the 1146 * issue queue 1147 * XXX Could avoid this loop. 1148 */ 1149 for (tmp = sea->ready_list.tqh_first; tmp; tmp = tmp->chain.tqe_next) 1150 if (scb == tmp) { 1151 TAILQ_REMOVE(&sea->ready_list, scb, chain); 1152 /* XXX Set some type of error result for operation. */ 1153 return 1; 1154 } 1155 1156 /* 1157 * If any commands are connected, we're going to fail the abort and let 1158 * the high level SCSI driver retry at a later time or issue a reset. 1159 */ 1160 if (sea->nexus) 1161 return 0; 1162 1163 /* 1164 * If the command is currently disconnected from the bus, and there are 1165 * no connected commands, we reconnect the I_T_L or I_T_L_Q nexus 1166 * associated with it, go into message out, and send an abort message. 1167 */ 1168 for (tmp = sea->nexus_list.tqh_first; tmp; 1169 tmp = tmp->chain.tqe_next) 1170 if (scb == tmp) { 1171 if (sea_select(sea, scb)) 1172 return 0; 1173 1174 msg = MSG_ABORT; 1175 msgptr = &msg; 1176 len = 1; 1177 phase = PH_MSGOUT; 1178 CONTROL = BASE_CMD | CMD_ATTN; 1179 sea_transfer_pio(sea, &phase, &len, &msgptr); 1180 1181 for (tmp = sea->nexus_list.tqh_first; tmp; 1182 tmp = tmp->chain.tqe_next) 1183 if (scb == tmp) { 1184 TAILQ_REMOVE(&sea->nexus_list, 1185 scb, chain); 1186 /* XXX Set some type of error result 1187 for the operation. */ 1188 return 1; 1189 } 1190 } 1191 1192 /* Command not found in any queue; race condition? */ 1193 return 1; 1194 } 1195 1196 void 1197 sea_done(struct sea_softc *sea, struct sea_scb *scb) 1198 { 1199 struct scsipi_xfer *xs = scb->xs; 1200 1201 callout_stop(&scb->xs->xs_callout); 1202 1203 xs->resid = scb->datalen; 1204 1205 /* XXXX need to get status */ 1206 if (scb->flags == SCB_ACTIVE) { 1207 xs->resid = 0; 1208 } else { 1209 if (scb->flags & (SCB_TIMEOUT | SCB_ABORTED)) 1210 xs->error = XS_TIMEOUT; 1211 if (scb->flags & SCB_ERROR) 1212 xs->error = XS_DRIVER_STUFFUP; 1213 } 1214 sea_free_scb(sea, scb, xs->xs_control); 1215 scsipi_done(xs); 1216 } 1217 1218 /* 1219 * Wait for completion of command in polled mode. 1220 */ 1221 int 1222 sea_poll(struct sea_softc *sea, struct scsipi_xfer *xs, int count) 1223 { 1224 int s; 1225 1226 while (count) { 1227 /* try to do something */ 1228 s = splbio(); 1229 if (!main_running) 1230 sea_main(); 1231 splx(s); 1232 if (xs->xs_status & XS_STS_DONE) 1233 return 0; 1234 delay(1000); 1235 count--; 1236 } 1237 return 1; 1238 } 1239 1240 /* 1241 * Do the transfer. We know we are connected. Update the flags, and call 1242 * sea_done() when task accomplished. Dialog controlled by the target. 1243 */ 1244 void 1245 sea_information_transfer(struct sea_softc *sea) 1246 { 1247 int timeout; 1248 u_char msgout = MSG_NOOP; 1249 int len; 1250 int s; 1251 u_char *data; 1252 u_char phase, tmp, old_phase = PH_INVALID; 1253 struct sea_scb *scb = sea->nexus; 1254 int loop; 1255 1256 for (timeout = 0; timeout < 10000000L; timeout++) { 1257 tmp = STATUS; 1258 if (tmp & STAT_PARITY) 1259 printf("%s: parity error detected\n", 1260 device_xname(&sea->sc_dev)); 1261 if (!(tmp & STAT_BSY)) { 1262 for (loop = 0; loop < 20; loop++) 1263 if ((tmp = STATUS) & STAT_BSY) 1264 break; 1265 if (!(tmp & STAT_BSY)) { 1266 printf("%s: !STAT_BSY unit in data transfer!\n", 1267 device_xname(&sea->sc_dev)); 1268 s = splbio(); 1269 sea->nexus = NULL; 1270 scb->flags = SCB_ERROR; 1271 splx(s); 1272 sea_done(sea, scb); 1273 return; 1274 } 1275 } 1276 1277 /* we only have a valid SCSI phase when REQ is asserted */ 1278 if (!(tmp & STAT_REQ)) 1279 continue; 1280 1281 if (sea->type == FDOMAIN840) 1282 tmp = ((tmp & 0x08) >> 2) | 1283 ((tmp & 0x02) << 2) | 1284 (tmp & 0xf5); 1285 phase = tmp & PH_MASK; 1286 if (phase != old_phase) 1287 old_phase = phase; 1288 1289 switch (phase) { 1290 case PH_DATAOUT: 1291 #ifdef SEA_NODATAOUT 1292 printf("%s: SEA_NODATAOUT set, attempted DATAOUT aborted\n", 1293 device_xname(&sea->sc_dev)); 1294 msgout = MSG_ABORT; 1295 CONTROL = BASE_CMD | CMD_ATTN; 1296 break; 1297 #endif 1298 case PH_DATAIN: 1299 if (!scb->data) 1300 printf("no data address!\n"); 1301 #ifdef SEA_BLINDTRANSFER 1302 if (scb->datalen && !(scb->datalen % BLOCK_SIZE)) { 1303 while (scb->datalen) { 1304 for (loop = 0; loop < 50000; loop++) 1305 if ((tmp = STATUS) & STAT_REQ) 1306 break; 1307 if (!(tmp & STAT_REQ)) { 1308 printf("%s: timeout waiting for STAT_REQ\n", 1309 device_xname(&sea->sc_dev)); 1310 /* XXX Do something? */ 1311 } 1312 if (sea->type == FDOMAIN840) 1313 tmp = ((tmp & 0x08) >> 2) | 1314 ((tmp & 0x02) << 2) | 1315 (tmp & 0xf5); 1316 if ((tmp & PH_MASK) != phase) 1317 break; 1318 if (!(phase & STAT_IO)) { 1319 #ifdef SEA_ASSEMBLER 1320 void *junk; 1321 __asm("cld\n\t\ 1322 rep\n\t\ 1323 movsl" : 1324 "=S" (scb->data), 1325 "=c" (len), 1326 "=D" (junk) : 1327 "0" (scb->data), 1328 "1" (BLOCK_SIZE >> 2), 1329 "2" (sea->maddr_dr)); 1330 #else 1331 for (len = BLOCK_SIZE; 1332 len; len--) 1333 DATA = *(scb->data++); 1334 #endif 1335 } else { 1336 #ifdef SEA_ASSEMBLER 1337 void *junk; 1338 __asm("cld\n\t\ 1339 rep\n\t\ 1340 movsl" : 1341 "=D" (scb->data), 1342 "=c" (len), 1343 "=S" (junk) : 1344 "0" (scb->data), 1345 "1" (BLOCK_SIZE >> 2), 1346 "2" (sea->maddr_dr)); 1347 #else 1348 for (len = BLOCK_SIZE; 1349 len; len--) 1350 *(scb->data++) = DATA; 1351 #endif 1352 } 1353 scb->datalen -= BLOCK_SIZE; 1354 } 1355 } 1356 #endif 1357 if (scb->datalen) 1358 sea_transfer_pio(sea, &phase, &scb->datalen, 1359 &scb->data); 1360 break; 1361 case PH_MSGIN: 1362 /* Multibyte messages should not be present here. */ 1363 len = 1; 1364 data = &tmp; 1365 sea_transfer_pio(sea, &phase, &len, &data); 1366 /* scb->MessageIn = tmp; */ 1367 1368 switch (tmp) { 1369 case MSG_ABORT: 1370 scb->flags = SCB_ABORTED; 1371 printf("sea: command aborted by target\n"); 1372 CONTROL = BASE_CMD; 1373 sea_done(sea, scb); 1374 return; 1375 case MSG_CMDCOMPLETE: 1376 s = splbio(); 1377 sea->nexus = NULL; 1378 splx(s); 1379 sea->busy[scb->xs->xs_periph->periph_target] &= 1380 ~(1 << scb->xs->xs_periph->periph_lun); 1381 CONTROL = BASE_CMD; 1382 sea_done(sea, scb); 1383 return; 1384 case MSG_MESSAGE_REJECT: 1385 printf("%s: message_reject received\n", 1386 device_xname(&sea->sc_dev)); 1387 break; 1388 case MSG_DISCONNECT: 1389 s = splbio(); 1390 TAILQ_INSERT_TAIL(&sea->nexus_list, 1391 scb, chain); 1392 sea->nexus = NULL; 1393 CONTROL = BASE_CMD; 1394 splx(s); 1395 return; 1396 case MSG_SAVEDATAPOINTER: 1397 case MSG_RESTOREPOINTERS: 1398 /* save/restore of pointers are ignored */ 1399 break; 1400 default: 1401 /* 1402 * This should be handled in the pio data 1403 * transfer phase, as the ATN should be raised 1404 * before ACK goes false when rejecting a 1405 * message. 1406 */ 1407 printf("%s: unknown message in: %x\n", 1408 device_xname(&sea->sc_dev), tmp); 1409 break; 1410 } /* switch (tmp) */ 1411 break; 1412 case PH_MSGOUT: 1413 len = 1; 1414 data = &msgout; 1415 /* sea->last_message = msgout; */ 1416 sea_transfer_pio(sea, &phase, &len, &data); 1417 if (msgout == MSG_ABORT) { 1418 printf("%s: sent message abort to target\n", 1419 device_xname(&sea->sc_dev)); 1420 s = splbio(); 1421 sea->busy[scb->xs->xs_periph->periph_target] &= 1422 ~(1 << scb->xs->xs_periph->periph_lun); 1423 sea->nexus = NULL; 1424 scb->flags = SCB_ABORTED; 1425 splx(s); 1426 /* enable interrupt from scsi */ 1427 sea_done(sea, scb); 1428 return; 1429 } 1430 msgout = MSG_NOOP; 1431 break; 1432 case PH_CMD: 1433 len = scb->xs->cmdlen; 1434 data = (char *) scb->xs->cmd; 1435 sea_transfer_pio(sea, &phase, &len, &data); 1436 break; 1437 case PH_STAT: 1438 len = 1; 1439 data = &tmp; 1440 sea_transfer_pio(sea, &phase, &len, &data); 1441 scb->xs->status = tmp; 1442 break; 1443 default: 1444 printf("sea: unknown phase\n"); 1445 } /* switch (phase) */ 1446 } /* for (...) */ 1447 1448 /* If we get here we have got a timeout! */ 1449 printf("%s: timeout in data transfer\n", device_xname(&sea->sc_dev)); 1450 scb->flags = SCB_TIMEOUT; 1451 /* XXX Should I clear scsi-bus state? */ 1452 sea_done(sea, scb); 1453 } 1454