1 /* $NetBSD: seagate.c,v 1.49 2002/04/05 18:27:54 bouyer 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 1.49 2002/04/05 18:27:54 bouyer 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/user.h> 79 #include <sys/queue.h> 80 #include <sys/malloc.h> 81 82 #include <machine/intr.h> 83 #include <machine/pio.h> 84 85 #include <dev/scsipi/scsi_all.h> 86 #include <dev/scsipi/scsipi_all.h> 87 #include <dev/scsipi/scsi_message.h> 88 #include <dev/scsipi/scsiconf.h> 89 90 #include <dev/isa/isareg.h> 91 #include <dev/isa/isavar.h> /* XXX USES ISA HOLE DIRECTLY */ 92 93 #define SEA_SCB_MAX 32 /* allow maximally 8 scsi control blocks */ 94 #define SCB_TABLE_SIZE 8 /* start with 8 scb entries in table */ 95 #define BLOCK_SIZE 512 /* size of READ/WRITE areas on SCSI card */ 96 97 /* 98 * defining SEA_BLINDTRANSFER will make DATA IN and DATA OUT to be done with 99 * blind transfers, i.e. no check is done for scsi phase changes. This will 100 * result in data loss if the scsi device does not send its data using 101 * BLOCK_SIZE bytes at a time. 102 * If SEA_BLINDTRANSFER defined and SEA_ASSEMBLER also defined will result in 103 * the use of blind transfers coded in assembler. SEA_ASSEMBLER is no good 104 * without SEA_BLINDTRANSFER defined. 105 */ 106 #define SEA_BLINDTRANSFER /* do blind transfers */ 107 #define SEA_ASSEMBLER /* Use assembly code for fast transfers */ 108 109 /* 110 * defining SEA_NOMSGS causes messages not to be used (thereby disabling 111 * disconnects) 112 */ 113 #undef SEA_NOMSGS 114 115 /* 116 * defining SEA_NODATAOUT makes dataout phase being aborted 117 */ 118 #undef SEA_NODATAOUT 119 120 /* Debugging definitions. Should not be used unless you want a lot of 121 printouts even under normal conditions */ 122 123 #undef SEA_DEBUGQUEUE /* Display info about queue-lengths */ 124 125 /******************************* board definitions **************************/ 126 /* 127 * CONTROL defines 128 */ 129 #define CMD_RST 0x01 /* scsi reset */ 130 #define CMD_SEL 0x02 /* scsi select */ 131 #define CMD_BSY 0x04 /* scsi busy */ 132 #define CMD_ATTN 0x08 /* scsi attention */ 133 #define CMD_START_ARB 0x10 /* start arbitration bit */ 134 #define CMD_EN_PARITY 0x20 /* enable scsi parity generation */ 135 #define CMD_INTR 0x40 /* enable scsi interrupts */ 136 #define CMD_DRVR_ENABLE 0x80 /* scsi enable */ 137 138 /* 139 * STATUS 140 */ 141 #define STAT_BSY 0x01 /* scsi busy */ 142 #define STAT_MSG 0x02 /* scsi msg */ 143 #define STAT_IO 0x04 /* scsi I/O */ 144 #define STAT_CD 0x08 /* scsi C/D */ 145 #define STAT_REQ 0x10 /* scsi req */ 146 #define STAT_SEL 0x20 /* scsi select */ 147 #define STAT_PARITY 0x40 /* parity error bit */ 148 #define STAT_ARB_CMPL 0x80 /* arbitration complete bit */ 149 150 /* 151 * REQUESTS 152 */ 153 #define PH_DATAOUT (0) 154 #define PH_DATAIN (STAT_IO) 155 #define PH_CMD (STAT_CD) 156 #define PH_STAT (STAT_CD | STAT_IO) 157 #define PH_MSGOUT (STAT_MSG | STAT_CD) 158 #define PH_MSGIN (STAT_MSG | STAT_CD | STAT_IO) 159 160 #define PH_MASK (STAT_MSG | STAT_CD | STAT_IO) 161 162 #define PH_INVALID 0xff 163 164 #define SEA_RAMOFFSET 0x00001800 165 166 #define BASE_CMD (CMD_INTR | CMD_EN_PARITY) 167 168 #define SEAGATE 1 /* Seagate ST0[12] */ 169 #define FDOMAIN 2 /* Future Domain TMC-{885,950} */ 170 #define FDOMAIN840 3 /* Future Domain TMC-{84[01],88[01]} */ 171 172 /******************************************************************************/ 173 174 /* scsi control block used to keep info about a scsi command */ 175 struct sea_scb { 176 u_char *data; /* position in data buffer so far */ 177 int datalen; /* bytes remaining to transfer */ 178 TAILQ_ENTRY(sea_scb) chain; 179 struct scsipi_xfer *xs; /* the scsipi_xfer for this cmd */ 180 int flags; /* status of the instruction */ 181 #define SCB_FREE 0 182 #define SCB_ACTIVE 1 183 #define SCB_ABORTED 2 184 #define SCB_TIMEOUT 4 185 #define SCB_ERROR 8 186 }; 187 188 /* 189 * data structure describing current status of the scsi bus. One for each 190 * controller card. 191 */ 192 struct sea_softc { 193 struct device sc_dev; 194 void *sc_ih; 195 196 int type; /* board type */ 197 caddr_t maddr; /* Base address for card */ 198 caddr_t maddr_cr_sr; /* Address of control and status reg */ 199 caddr_t maddr_dr; /* Address of data register */ 200 201 struct scsipi_adapter sc_adapter; 202 struct scsipi_channel sc_channel; 203 204 TAILQ_HEAD(, sea_scb) free_list, ready_list, nexus_list; 205 struct sea_scb *nexus; /* currently connected command */ 206 int numscbs; /* number of scsi control blocks */ 207 struct sea_scb scb[SCB_TABLE_SIZE]; 208 209 int our_id; /* our scsi id */ 210 u_char our_id_mask; 211 volatile u_char busy[8]; /* index=target, bit=lun, Keep track of 212 busy luns at device target */ 213 }; 214 215 /* flag showing if main routine is running. */ 216 static volatile int main_running = 0; 217 218 #define STATUS (*(volatile u_char *)sea->maddr_cr_sr) 219 #define CONTROL STATUS 220 #define DATA (*(volatile u_char *)sea->maddr_dr) 221 222 /* 223 * These are "special" values for the tag parameter passed to sea_select 224 * Not implemented right now. 225 */ 226 #define TAG_NEXT -1 /* Use next free tag */ 227 #define TAG_NONE -2 /* 228 * Establish I_T_L nexus instead of I_T_L_Q 229 * even on SCSI-II devices. 230 */ 231 232 typedef struct { 233 char *signature; 234 int offset, length; 235 int type; 236 } BiosSignature; 237 238 /* 239 * Signatures for automatic recognition of board type 240 */ 241 static const BiosSignature signatures[] = { 242 {"ST01 v1.7 (C) Copyright 1987 Seagate", 15, 37, SEAGATE}, 243 {"SCSI BIOS 2.00 (C) Copyright 1987 Seagate", 15, 40, SEAGATE}, 244 245 /* 246 * The following two lines are NOT mistakes. One detects ROM revision 247 * 3.0.0, the other 3.2. Since seagate has only one type of SCSI adapter, 248 * and this is not going to change, the "SEAGATE" and "SCSI" together 249 * are probably "good enough" 250 */ 251 {"SEAGATE SCSI BIOS ", 16, 17, SEAGATE}, 252 {"SEAGATE SCSI BIOS ", 17, 17, SEAGATE}, 253 254 /* 255 * However, future domain makes several incompatible SCSI boards, so specific 256 * signatures must be used. 257 */ 258 {"FUTURE DOMAIN CORP. (C) 1986-1989 V5.0C2/14/89", 5, 45, FDOMAIN}, 259 {"FUTURE DOMAIN CORP. (C) 1986-1989 V6.0A7/28/89", 5, 46, FDOMAIN}, 260 {"FUTURE DOMAIN CORP. (C) 1986-1990 V6.0105/31/90",5, 47, FDOMAIN}, 261 {"FUTURE DOMAIN CORP. (C) 1986-1990 V6.0209/18/90",5, 47, FDOMAIN}, 262 {"FUTURE DOMAIN CORP. (C) 1986-1990 V7.009/18/90", 5, 46, FDOMAIN}, 263 {"FUTURE DOMAIN CORP. (C) 1992 V8.00.004/02/92", 5, 44, FDOMAIN}, 264 {"FUTURE DOMAIN TMC-950", 5, 21, FDOMAIN}, 265 }; 266 267 #define nsignatures (sizeof(signatures) / sizeof(signatures[0])) 268 269 #ifdef notdef 270 static const char *bases[] = { 271 (char *) 0xc8000, (char *) 0xca000, (char *) 0xcc000, 272 (char *) 0xce000, (char *) 0xdc000, (char *) 0xde000 273 }; 274 275 #define nbases (sizeof(bases) / sizeof(bases[0])) 276 #endif 277 278 int seaintr __P((void *)); 279 void sea_scsipi_request __P((struct scsipi_channel *, 280 scsipi_adapter_req_t, void *)); 281 void sea_timeout __P((void *)); 282 void sea_done __P((struct sea_softc *, struct sea_scb *)); 283 struct sea_scb *sea_get_scb __P((struct sea_softc *, int)); 284 void sea_free_scb __P((struct sea_softc *, struct sea_scb *, int)); 285 static void sea_main __P((void)); 286 static void sea_information_transfer __P((struct sea_softc *)); 287 int sea_poll __P((struct sea_softc *, struct scsipi_xfer *, int)); 288 void sea_init __P((struct sea_softc *)); 289 void sea_send_scb __P((struct sea_softc *sea, struct sea_scb *scb)); 290 void sea_reselect __P((struct sea_softc *sea)); 291 int sea_select __P((struct sea_softc *sea, struct sea_scb *scb)); 292 int sea_transfer_pio __P((struct sea_softc *sea, u_char *phase, 293 int *count, u_char **data)); 294 int sea_abort __P((struct sea_softc *, struct sea_scb *scb)); 295 296 void sea_grow_scb __P((struct sea_softc *)); 297 298 int seaprobe __P((struct device *, struct cfdata *, void *)); 299 void seaattach __P((struct device *, struct device *, void *)); 300 301 struct cfattach sea_ca = { 302 sizeof(struct sea_softc), seaprobe, seaattach 303 }; 304 305 extern struct cfdriver sea_cd; 306 307 #ifdef SEA_DEBUGQUEUE 308 void 309 sea_queue_length(sea) 310 struct sea_softc *sea; 311 { 312 struct sea_scb *scb; 313 int connected, issued, disconnected; 314 315 connected = sea->nexus ? 1 : 0; 316 for (scb = sea->ready_list.tqh_first, issued = 0; scb; 317 scb = scb->chain.tqe_next, issued++); 318 for (scb = sea->nexus_list.tqh_first, disconnected = 0; scb; 319 scb = scb->chain.tqe_next, disconnected++); 320 printf("%s: length: %d/%d/%d\n", sea->sc_dev.dv_xname, connected, 321 issued, disconnected); 322 } 323 #endif 324 325 /* 326 * Check if the device can be found at the port given and if so, detect the 327 * type the type of board. Set it up ready for further work. Takes the isa_dev 328 * structure from autoconf as an argument. 329 * Returns 1 if card recognized, 0 if errors. 330 */ 331 int 332 seaprobe(parent, match, aux) 333 struct device *parent; 334 struct cfdata *match; 335 void *aux; 336 { 337 struct isa_attach_args *ia = aux; 338 int i, type = 0; 339 caddr_t maddr; 340 341 if (ia->ia_niomem < 1) 342 return (0); 343 if (ia->ia_nirq < 1) 344 return (0); 345 346 if (ISA_DIRECT_CONFIG(ia)) 347 return (0); 348 349 if (ia->ia_iomem[0].ir_addr == ISACF_IOMEM_DEFAULT) 350 return (0); 351 if (ia->ia_irq[0].ir_irq == ISACF_IRQ_DEFAULT) 352 return (0); 353 354 /* XXX XXX XXX */ 355 maddr = ISA_HOLE_VADDR(ia->ia_iomem[0].ir_addr); 356 357 /* check board type */ /* No way to define this through config */ 358 for (i = 0; i < nsignatures; i++) 359 if (!memcmp(maddr + signatures[i].offset, 360 signatures[i].signature, signatures[i].length)) { 361 type = signatures[i].type; 362 break; 363 } 364 365 /* Find controller and data memory addresses */ 366 switch (type) { 367 case SEAGATE: 368 case FDOMAIN840: 369 case FDOMAIN: 370 break; 371 default: 372 #ifdef DEBUG 373 printf("seaprobe: board type unknown at address %p\n", maddr); 374 #endif 375 return 0; 376 } 377 378 ia->ia_niomem = 1; 379 ia->ia_iomem[0].ir_size = 0x2000; 380 381 ia->ia_nirq = 1; 382 383 ia->ia_nio = 0; 384 ia->ia_ndrq = 0; 385 386 return 1; 387 } 388 389 /* 390 * Attach all sub-devices we can find 391 */ 392 void 393 seaattach(parent, self, aux) 394 struct device *parent, *self; 395 void *aux; 396 { 397 struct isa_attach_args *ia = aux; 398 struct sea_softc *sea = (void *)self; 399 struct scsipi_adapter *adapt = &sea->sc_adapter; 400 struct scsipi_channel *chan = &sea->sc_channel; 401 int i; 402 403 /* XXX XXX XXX */ 404 sea->maddr = ISA_HOLE_VADDR(ia->ia_iomem[0].ir_addr); 405 406 /* check board type */ /* No way to define this through config */ 407 for (i = 0; i < nsignatures; i++) 408 if (!memcmp(sea->maddr + signatures[i].offset, 409 signatures[i].signature, signatures[i].length)) { 410 sea->type = signatures[i].type; 411 break; 412 } 413 414 /* Find controller and data memory addresses */ 415 switch (sea->type) { 416 case SEAGATE: 417 case FDOMAIN840: 418 sea->maddr_cr_sr = 419 (void *) (((u_char *)sea->maddr) + 0x1a00); 420 sea->maddr_dr = 421 (void *) (((u_char *)sea->maddr) + 0x1c00); 422 break; 423 case FDOMAIN: 424 sea->maddr_cr_sr = 425 (void *) (((u_char *)sea->maddr) + 0x1c00); 426 sea->maddr_dr = 427 (void *) (((u_char *)sea->maddr) + 0x1e00); 428 break; 429 default: 430 #ifdef DEBUG 431 printf("%s: board type unknown at address %p\n", 432 sea->sc_dev.dv_xname, sea->maddr); 433 #endif 434 return; 435 } 436 437 /* Test controller RAM (works the same way on future domain cards?) */ 438 *((u_char *)sea->maddr + SEA_RAMOFFSET) = 0xa5; 439 *((u_char *)sea->maddr + SEA_RAMOFFSET + 1) = 0x5a; 440 441 if ((*((u_char *)sea->maddr + SEA_RAMOFFSET) != 0xa5) || 442 (*((u_char *)sea->maddr + SEA_RAMOFFSET + 1) != 0x5a)) { 443 printf("%s: board RAM failure\n", sea->sc_dev.dv_xname); 444 return; 445 } 446 447 sea_init(sea); 448 449 /* 450 * Fill in the scsipi_adapter. 451 */ 452 memset(adapt, 0, sizeof(*adapt)); 453 adapt->adapt_dev = &sea->sc_dev; 454 adapt->adapt_nchannels = 1; 455 adapt->adapt_openings = sea->numscbs; 456 adapt->adapt_max_periph = 1; 457 adapt->adapt_request = sea_scsipi_request; 458 adapt->adapt_minphys = minphys; 459 460 /* 461 * Fill in the scsipi_channel. 462 */ 463 memset(chan, 0, sizeof(*chan)); 464 chan->chan_adapter = adapt; 465 chan->chan_bustype = &scsi_bustype; 466 chan->chan_channel = 0; 467 chan->chan_ntargets = 8; 468 chan->chan_nluns = 8; 469 chan->chan_id = sea->our_id; 470 chan->chan_flags = SCSIPI_CHAN_CANGROW; 471 472 printf("\n"); 473 474 sea->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 475 IST_EDGE, IPL_BIO, seaintr, sea); 476 477 /* 478 * ask the adapter what subunits are present 479 */ 480 config_found(self, &sea->sc_channel, scsiprint); 481 } 482 483 /* 484 * Catch an interrupt from the adaptor 485 */ 486 int 487 seaintr(arg) 488 void *arg; 489 { 490 struct sea_softc *sea = arg; 491 492 #ifdef DEBUG /* extra overhead, and only needed for intr debugging */ 493 if ((STATUS & STAT_PARITY) == 0 && 494 (STATUS & (STAT_SEL | STAT_IO)) != (STAT_SEL | STAT_IO)) 495 return 0; 496 #endif 497 498 loop: 499 /* dispatch to appropriate routine if found and done=0 */ 500 /* should check to see that this card really caused the interrupt */ 501 502 if (STATUS & STAT_PARITY) { 503 /* Parity error interrupt */ 504 printf("%s: parity error\n", sea->sc_dev.dv_xname); 505 return 1; 506 } 507 508 if ((STATUS & (STAT_SEL | STAT_IO)) == (STAT_SEL | STAT_IO)) { 509 /* Reselect interrupt */ 510 sea_reselect(sea); 511 if (!main_running) 512 sea_main(); 513 goto loop; 514 } 515 516 return 1; 517 } 518 519 /* 520 * Setup data structures, and reset the board and the SCSI bus. 521 */ 522 void 523 sea_init(sea) 524 struct sea_softc *sea; 525 { 526 int i; 527 528 /* Reset the scsi bus (I don't know if this is needed */ 529 CONTROL = BASE_CMD | CMD_DRVR_ENABLE | CMD_RST; 530 delay(25); /* hold reset for at least 25 microseconds */ 531 CONTROL = BASE_CMD; 532 delay(10); /* wait a Bus Clear Delay (800 ns + bus free delay (800 ns) */ 533 534 /* Set our id (don't know anything about this) */ 535 switch (sea->type) { 536 case SEAGATE: 537 sea->our_id = 7; 538 break; 539 case FDOMAIN: 540 case FDOMAIN840: 541 sea->our_id = 6; 542 break; 543 } 544 sea->our_id_mask = 1 << sea->our_id; 545 546 /* init fields used by our routines */ 547 sea->nexus = 0; 548 TAILQ_INIT(&sea->ready_list); 549 TAILQ_INIT(&sea->nexus_list); 550 TAILQ_INIT(&sea->free_list); 551 for (i = 0; i < 8; i++) 552 sea->busy[i] = 0x00; 553 554 /* link up the free list of scbs */ 555 sea->numscbs = SCB_TABLE_SIZE; 556 for (i = 0; i < SCB_TABLE_SIZE; i++) { 557 TAILQ_INSERT_TAIL(&sea->free_list, &sea->scb[i], chain); 558 } 559 } 560 561 /* 562 * start a scsi operation given the command and the data address. Also needs 563 * the unit, target and lu. 564 */ 565 void 566 sea_scsipi_request(chan, req, arg) 567 struct scsipi_channel *chan; 568 scsipi_adapter_req_t req; 569 void *arg; 570 { 571 struct scsipi_xfer *xs; 572 struct scsipi_periph *periph; 573 struct sea_softc *sea = (void *)chan->chan_adapter->adapt_dev; 574 struct sea_scb *scb; 575 int flags; 576 int s; 577 578 switch (req) { 579 case ADAPTER_REQ_RUN_XFER: 580 xs = arg; 581 periph = xs->xs_periph; 582 flags = xs->xs_control; 583 584 SC_DEBUG(periph, SCSIPI_DB2, ("sea_scsipi_requeset\n")); 585 586 /* XXX Reset not implemented. */ 587 if (flags & XS_CTL_RESET) { 588 printf("%s: resetting\n", sea->sc_dev.dv_xname); 589 xs->error = XS_DRIVER_STUFFUP; 590 scsipi_done(xs); 591 return; 592 } 593 594 /* Get an SCB to use. */ 595 scb = sea_get_scb(sea, flags); 596 #ifdef DIAGNOSTIC 597 /* 598 * This should never happen as we track the resources 599 * in the mid-layer. 600 */ 601 if (scb == NULL) { 602 scsipi_printaddr(periph); 603 printf("unable to allocate scb\n"); 604 panic("sea_scsipi_request"); 605 } 606 #endif 607 608 scb->flags = SCB_ACTIVE; 609 scb->xs = xs; 610 611 /* 612 * Put all the arguments for the xfer in the scb 613 */ 614 scb->datalen = xs->datalen; 615 scb->data = xs->data; 616 617 #ifdef SEA_DEBUGQUEUE 618 sea_queue_length(sea); 619 #endif 620 621 s = splbio(); 622 623 sea_send_scb(sea, scb); 624 625 if ((flags & XS_CTL_POLL) == 0) { 626 callout_reset(&scb->xs->xs_callout, 627 mstohz(xs->timeout), sea_timeout, scb); 628 splx(s); 629 return; 630 } 631 632 splx(s); 633 634 /* 635 * If we can't use interrupts, poll on completion 636 */ 637 if (sea_poll(sea, xs, xs->timeout)) { 638 sea_timeout(scb); 639 if (sea_poll(sea, xs, 2000)) 640 sea_timeout(scb); 641 } 642 return; 643 644 case ADAPTER_REQ_GROW_RESOURCES: 645 sea_grow_scb(sea); 646 return; 647 648 case ADAPTER_REQ_SET_XFER_MODE: 649 { 650 struct scsipi_xfer_mode *xm = arg; 651 652 /* 653 * We don't support sync or wide or tagged queueing, 654 * so announce that now. 655 */ 656 xm->xm_mode = 0; 657 xm->xm_period = 0; 658 xm->xm_offset = 0; 659 scsipi_async_event(chan, ASYNC_EVENT_XFER_MODE, xm); 660 return; 661 } 662 } 663 } 664 665 /* 666 * Get a free scb. If there are none, see if we can allocate a new one. If so, 667 * put it in the hash table too; otherwise return an error or sleep. 668 */ 669 struct sea_scb * 670 sea_get_scb(sea, flags) 671 struct sea_softc *sea; 672 int flags; 673 { 674 int s; 675 struct sea_scb *scb; 676 677 s = splbio(); 678 if ((scb = TAILQ_FIRST(&sea->free_list)) != NULL) 679 TAILQ_REMOVE(&sea->free_list, scb, chain); 680 splx(s); 681 682 return (scb); 683 } 684 685 /* 686 * Try to send this command to the board. Because this board does not use any 687 * mailboxes, this routine simply adds the command to the queue held by the 688 * sea_softc structure. 689 * A check is done to see if the command contains a REQUEST_SENSE command, and 690 * if so the command is put first in the queue, otherwise the command is added 691 * to the end of the queue. ?? Not correct ?? 692 */ 693 void 694 sea_send_scb(sea, scb) 695 struct sea_softc *sea; 696 struct sea_scb *scb; 697 { 698 699 TAILQ_INSERT_TAIL(&sea->ready_list, scb, chain); 700 /* Try to do some work on the card. */ 701 if (!main_running) 702 sea_main(); 703 } 704 705 /* 706 * Coroutine that runs as long as more work can be done on the seagate host 707 * adapter in a system. Both sea_scsi_cmd and sea_intr will try to start it in 708 * case it is not running. 709 */ 710 711 void 712 sea_main() 713 { 714 struct sea_softc *sea; 715 struct sea_scb *scb; 716 int done; 717 int unit; 718 int s; 719 720 main_running = 1; 721 722 /* 723 * This should not be run with interrupts disabled, but use the splx 724 * code instead. 725 */ 726 loop: 727 done = 1; 728 for (unit = 0; unit < sea_cd.cd_ndevs; unit++) { 729 sea = device_lookup(&sea_cd, unit); 730 if (!sea) 731 continue; 732 s = splbio(); 733 if (!sea->nexus) { 734 /* 735 * Search through the ready_list for a command 736 * destined for a target that's not busy. 737 */ 738 for (scb = sea->ready_list.tqh_first; scb; 739 scb = scb->chain.tqe_next) { 740 if (!(sea->busy[scb->xs->xs_periph->periph_target] & 741 (1 << scb->xs->xs_periph->periph_lun))) { 742 TAILQ_REMOVE(&sea->ready_list, scb, 743 chain); 744 745 /* Re-enable interrupts. */ 746 splx(s); 747 748 /* 749 * Attempt to establish an I_T_L nexus. 750 * On success, sea->nexus is set. 751 * On failure, we must add the command 752 * back to the issue queue so we can 753 * keep trying. 754 */ 755 756 /* 757 * REQUEST_SENSE commands are issued 758 * without tagged queueing, even on 759 * SCSI-II devices because the 760 * contingent alligence condition 761 * exists for the entire unit. 762 */ 763 764 /* 765 * First check that if any device has 766 * tried a reconnect while we have done 767 * other things with interrupts 768 * disabled. 769 */ 770 771 if ((STATUS & (STAT_SEL | STAT_IO)) == 772 (STAT_SEL | STAT_IO)) { 773 sea_reselect(sea); 774 break; 775 } 776 if (sea_select(sea, scb)) { 777 s = splbio(); 778 TAILQ_INSERT_HEAD(&sea->ready_list, 779 scb, chain); 780 splx(s); 781 } else 782 break; 783 } /* if target/lun is not busy */ 784 } /* for scb */ 785 if (!sea->nexus) { 786 /* check for reselection phase */ 787 if ((STATUS & (STAT_SEL | STAT_IO)) == 788 (STAT_SEL | STAT_IO)) { 789 sea_reselect(sea); 790 } 791 } 792 } /* if (!sea->nexus) */ 793 794 splx(s); 795 if (sea->nexus) { /* we are connected. Do the task */ 796 sea_information_transfer(sea); 797 done = 0; 798 } else 799 break; 800 } /* for instance */ 801 802 if (!done) 803 goto loop; 804 805 main_running = 0; 806 } 807 808 /* 809 * Allocate an scb and add it to the free list. 810 * We are called at splbio. 811 */ 812 void 813 sea_grow_scb(sea) 814 struct sea_softc *sea; 815 { 816 struct sea_scb *scb; 817 818 if (sea->numscbs == SEA_SCB_MAX) { 819 sea->sc_channel.chan_flags &= ~SCSIPI_CHAN_CANGROW; 820 return; 821 } 822 823 scb = malloc(sizeof(struct sea_scb), M_DEVBUF, M_NOWAIT|M_ZERO); 824 if (scb == NULL) 825 return; 826 827 TAILQ_INSERT_TAIL(&sea->free_list, scb, chain); 828 sea->numscbs++; 829 sea->sc_adapter.adapt_openings++; 830 } 831 void 832 sea_free_scb(sea, scb, flags) 833 struct sea_softc *sea; 834 struct sea_scb *scb; 835 int flags; 836 { 837 int s; 838 839 s = splbio(); 840 scb->flags = SCB_FREE; 841 TAILQ_INSERT_HEAD(&sea->free_list, scb, chain); 842 splx(s); 843 } 844 845 void 846 sea_timeout(arg) 847 void *arg; 848 { 849 struct sea_scb *scb = arg; 850 struct scsipi_xfer *xs = scb->xs; 851 struct scsipi_periph *periph = xs->xs_periph; 852 struct sea_softc *sea = 853 (void *)periph->periph_channel->chan_adapter->adapt_dev; 854 int s; 855 856 scsipi_printaddr(periph); 857 printf("timed out"); 858 859 s = splbio(); 860 861 /* 862 * If it has been through before, then 863 * a previous abort has failed, don't 864 * try abort again 865 */ 866 if (scb->flags & SCB_ABORTED) { 867 /* abort timed out */ 868 printf(" AGAIN\n"); 869 scb->xs->xs_retries = 0; 870 scb->flags |= SCB_ABORTED; 871 sea_done(sea, scb); 872 } else { 873 /* abort the operation that has timed out */ 874 printf("\n"); 875 scb->flags |= SCB_ABORTED; 876 sea_abort(sea, scb); 877 /* 2 secs for the abort */ 878 if ((xs->xs_control & XS_CTL_POLL) == 0) 879 callout_reset(&scb->xs->xs_callout, 2 * hz, 880 sea_timeout, scb); 881 } 882 883 splx(s); 884 } 885 886 void 887 sea_reselect(sea) 888 struct sea_softc *sea; 889 { 890 u_char target_mask; 891 int i; 892 u_char lun, phase; 893 u_char msg[3]; 894 int len; 895 u_char *data; 896 struct sea_scb *scb; 897 int abort = 0; 898 899 if (!((target_mask = STATUS) & STAT_SEL)) { 900 printf("%s: wrong state 0x%x\n", sea->sc_dev.dv_xname, 901 target_mask); 902 return; 903 } 904 905 /* wait for a device to win the reselection phase */ 906 /* signals this by asserting the I/O signal */ 907 for (i = 10; i && (STATUS & (STAT_SEL | STAT_IO | STAT_BSY)) != 908 (STAT_SEL | STAT_IO | 0); i--); 909 /* !! Check for timeout here */ 910 /* the data bus contains original initiator id ORed with target id */ 911 target_mask = DATA; 912 /* see that we really are the initiator */ 913 if (!(target_mask & sea->our_id_mask)) { 914 printf("%s: polled reselection was not for me: 0x%x\n", 915 sea->sc_dev.dv_xname, target_mask); 916 return; 917 } 918 /* find target who won */ 919 target_mask &= ~sea->our_id_mask; 920 /* host responds by asserting the BSY signal */ 921 CONTROL = BASE_CMD | CMD_DRVR_ENABLE | CMD_BSY; 922 /* target should respond by deasserting the SEL signal */ 923 for (i = 50000; i && (STATUS & STAT_SEL); i++); 924 /* remove the busy status */ 925 CONTROL = BASE_CMD | CMD_DRVR_ENABLE; 926 /* we are connected. Now we wait for the MSGIN condition */ 927 for (i = 50000; i && !(STATUS & STAT_REQ); i--); 928 /* !! Add timeout check here */ 929 /* hope we get an IDENTIFY message */ 930 len = 3; 931 data = msg; 932 phase = PH_MSGIN; 933 sea_transfer_pio(sea, &phase, &len, &data); 934 935 if (!MSG_ISIDENTIFY(msg[0])) { 936 printf("%s: expecting IDENTIFY message, got 0x%x\n", 937 sea->sc_dev.dv_xname, msg[0]); 938 abort = 1; 939 scb = NULL; 940 } else { 941 lun = msg[0] & 0x07; 942 943 /* 944 * Find the command corresponding to the I_T_L or I_T_L_Q nexus 945 * we just reestablished, and remove it from the disconnected 946 * queue. 947 */ 948 for (scb = sea->nexus_list.tqh_first; scb; 949 scb = scb->chain.tqe_next) 950 if (target_mask == (1 << scb->xs->xs_periph->periph_target) && 951 lun == scb->xs->xs_periph->periph_lun) { 952 TAILQ_REMOVE(&sea->nexus_list, scb, 953 chain); 954 break; 955 } 956 if (!scb) { 957 printf("%s: target %02x lun %d not disconnected\n", 958 sea->sc_dev.dv_xname, target_mask, lun); 959 /* 960 * Since we have an established nexus that we can't do 961 * anything with, we must abort it. 962 */ 963 abort = 1; 964 } 965 } 966 967 if (abort) { 968 msg[0] = MSG_ABORT; 969 len = 1; 970 data = msg; 971 phase = PH_MSGOUT; 972 CONTROL = BASE_CMD | CMD_ATTN; 973 sea_transfer_pio(sea, &phase, &len, &data); 974 } else 975 sea->nexus = scb; 976 977 return; 978 } 979 980 /* 981 * Transfer data in given phase using polled I/O. 982 */ 983 int 984 sea_transfer_pio(sea, phase, count, data) 985 struct sea_softc *sea; 986 u_char *phase; 987 int *count; 988 u_char **data; 989 { 990 u_char p = *phase, tmp; 991 int c = *count; 992 u_char *d = *data; 993 int timeout; 994 995 do { 996 /* 997 * Wait for assertion of REQ, after which the phase bits will 998 * be valid. 999 */ 1000 for (timeout = 0; timeout < 50000; timeout++) 1001 if ((tmp = STATUS) & STAT_REQ) 1002 break; 1003 if (!(tmp & STAT_REQ)) { 1004 printf("%s: timeout waiting for STAT_REQ\n", 1005 sea->sc_dev.dv_xname); 1006 break; 1007 } 1008 1009 /* 1010 * Check for phase mismatch. Reached if the target decides 1011 * that it has finished the transfer. 1012 */ 1013 if (sea->type == FDOMAIN840) 1014 tmp = ((tmp & 0x08) >> 2) | 1015 ((tmp & 0x02) << 2) | 1016 (tmp & 0xf5); 1017 if ((tmp & PH_MASK) != p) 1018 break; 1019 1020 /* Do actual transfer from SCSI bus to/from memory. */ 1021 if (!(p & STAT_IO)) 1022 DATA = *d; 1023 else 1024 *d = DATA; 1025 ++d; 1026 1027 /* 1028 * The SCSI standard suggests that in MSGOUT phase, the 1029 * initiator should drop ATN on the last byte of the message 1030 * phase after REQ has been asserted for the handshake but 1031 * before the initiator raises ACK. 1032 * Don't know how to accomplish this on the ST01/02. 1033 */ 1034 1035 #if 0 1036 /* 1037 * XXX 1038 * The st01 code doesn't wait for STAT_REQ to be deasserted. 1039 * Is this ok? 1040 */ 1041 for (timeout = 0; timeout < 200000L; timeout++) 1042 if (!(STATUS & STAT_REQ)) 1043 break; 1044 if (STATUS & STAT_REQ) 1045 printf("%s: timeout on wait for !STAT_REQ", 1046 sea->sc_dev.dv_xname); 1047 #endif 1048 } while (--c); 1049 1050 *count = c; 1051 *data = d; 1052 tmp = STATUS; 1053 if (tmp & STAT_REQ) 1054 *phase = tmp & PH_MASK; 1055 else 1056 *phase = PH_INVALID; 1057 1058 if (c && (*phase != p)) 1059 return -1; 1060 return 0; 1061 } 1062 1063 /* 1064 * Establish I_T_L or I_T_L_Q nexus for new or existing command including 1065 * ARBITRATION, SELECTION, and initial message out for IDENTIFY and queue 1066 * messages. Return -1 if selection could not execute for some reason, 0 if 1067 * selection succeded or failed because the target did not respond. 1068 */ 1069 int 1070 sea_select(sea, scb) 1071 struct sea_softc *sea; 1072 struct sea_scb *scb; 1073 { 1074 u_char msg[3], phase; 1075 u_char *data; 1076 int len; 1077 int timeout; 1078 1079 CONTROL = BASE_CMD; 1080 DATA = sea->our_id_mask; 1081 CONTROL = (BASE_CMD & ~CMD_INTR) | CMD_START_ARB; 1082 1083 /* wait for arbitration to complete */ 1084 for (timeout = 0; timeout < 3000000L; timeout++) 1085 if (STATUS & STAT_ARB_CMPL) 1086 break; 1087 if (!(STATUS & STAT_ARB_CMPL)) { 1088 if (STATUS & STAT_SEL) { 1089 printf("%s: arbitration lost\n", sea->sc_dev.dv_xname); 1090 scb->flags |= SCB_ERROR; 1091 } else { 1092 printf("%s: arbitration timeout\n", 1093 sea->sc_dev.dv_xname); 1094 scb->flags |= SCB_TIMEOUT; 1095 } 1096 CONTROL = BASE_CMD; 1097 return -1; 1098 } 1099 1100 delay(2); 1101 DATA = (u_char)((1 << scb->xs->xs_periph->periph_target) | 1102 sea->our_id_mask); 1103 CONTROL = 1104 #ifdef SEA_NOMSGS 1105 (BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE | CMD_SEL; 1106 #else 1107 (BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE | CMD_SEL | CMD_ATTN; 1108 #endif 1109 delay(1); 1110 1111 /* wait for a bsy from target */ 1112 for (timeout = 0; timeout < 2000000L; timeout++) 1113 if (STATUS & STAT_BSY) 1114 break; 1115 if (!(STATUS & STAT_BSY)) { 1116 /* should return some error to the higher level driver */ 1117 CONTROL = BASE_CMD; 1118 scb->flags |= SCB_TIMEOUT; 1119 return 0; 1120 } 1121 1122 /* Try to make the target to take a message from us */ 1123 #ifdef SEA_NOMSGS 1124 CONTROL = (BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE; 1125 #else 1126 CONTROL = (BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE | CMD_ATTN; 1127 #endif 1128 delay(1); 1129 1130 /* should start a msg_out phase */ 1131 for (timeout = 0; timeout < 2000000L; timeout++) 1132 if (STATUS & STAT_REQ) 1133 break; 1134 /* Remove ATN. */ 1135 CONTROL = BASE_CMD | CMD_DRVR_ENABLE; 1136 if (!(STATUS & STAT_REQ)) { 1137 /* 1138 * This should not be taken as an error, but more like an 1139 * unsupported feature! Should set a flag indicating that the 1140 * target don't support messages, and continue without failure. 1141 * (THIS IS NOT AN ERROR!) 1142 */ 1143 } else { 1144 msg[0] = MSG_IDENTIFY(scb->xs->xs_periph->periph_lun, 1); 1145 len = 1; 1146 data = msg; 1147 phase = PH_MSGOUT; 1148 /* Should do test on result of sea_transfer_pio(). */ 1149 sea_transfer_pio(sea, &phase, &len, &data); 1150 } 1151 if (!(STATUS & STAT_BSY)) 1152 printf("%s: after successful arbitrate: no STAT_BSY!\n", 1153 sea->sc_dev.dv_xname); 1154 1155 sea->nexus = scb; 1156 sea->busy[scb->xs->xs_periph->periph_target] |= 1157 1 << scb->xs->xs_periph->periph_lun; 1158 /* This assignment should depend on possibility to send a message to target. */ 1159 CONTROL = BASE_CMD | CMD_DRVR_ENABLE; 1160 /* XXX Reset pointer in command? */ 1161 return 0; 1162 } 1163 1164 /* 1165 * Send an abort to the target. Return 1 success, 0 on failure. 1166 */ 1167 int 1168 sea_abort(sea, scb) 1169 struct sea_softc *sea; 1170 struct sea_scb *scb; 1171 { 1172 struct sea_scb *tmp; 1173 u_char msg, phase, *msgptr; 1174 int len; 1175 1176 /* 1177 * If the command hasn't been issued yet, we simply remove it from the 1178 * issue queue 1179 * XXX Could avoid this loop. 1180 */ 1181 for (tmp = sea->ready_list.tqh_first; tmp; tmp = tmp->chain.tqe_next) 1182 if (scb == tmp) { 1183 TAILQ_REMOVE(&sea->ready_list, scb, chain); 1184 /* XXX Set some type of error result for operation. */ 1185 return 1; 1186 } 1187 1188 /* 1189 * If any commands are connected, we're going to fail the abort and let 1190 * the high level SCSI driver retry at a later time or issue a reset. 1191 */ 1192 if (sea->nexus) 1193 return 0; 1194 1195 /* 1196 * If the command is currently disconnected from the bus, and there are 1197 * no connected commands, we reconnect the I_T_L or I_T_L_Q nexus 1198 * associated with it, go into message out, and send an abort message. 1199 */ 1200 for (tmp = sea->nexus_list.tqh_first; tmp; 1201 tmp = tmp->chain.tqe_next) 1202 if (scb == tmp) { 1203 if (sea_select(sea, scb)) 1204 return 0; 1205 1206 msg = MSG_ABORT; 1207 msgptr = &msg; 1208 len = 1; 1209 phase = PH_MSGOUT; 1210 CONTROL = BASE_CMD | CMD_ATTN; 1211 sea_transfer_pio(sea, &phase, &len, &msgptr); 1212 1213 for (tmp = sea->nexus_list.tqh_first; tmp; 1214 tmp = tmp->chain.tqe_next) 1215 if (scb == tmp) { 1216 TAILQ_REMOVE(&sea->nexus_list, 1217 scb, chain); 1218 /* XXX Set some type of error result 1219 for the operation. */ 1220 return 1; 1221 } 1222 } 1223 1224 /* Command not found in any queue; race condition? */ 1225 return 1; 1226 } 1227 1228 void 1229 sea_done(sea, scb) 1230 struct sea_softc *sea; 1231 struct sea_scb *scb; 1232 { 1233 struct scsipi_xfer *xs = scb->xs; 1234 1235 callout_stop(&scb->xs->xs_callout); 1236 1237 xs->resid = scb->datalen; 1238 1239 /* XXXX need to get status */ 1240 if (scb->flags == SCB_ACTIVE) { 1241 xs->resid = 0; 1242 } else { 1243 if (scb->flags & (SCB_TIMEOUT | SCB_ABORTED)) 1244 xs->error = XS_TIMEOUT; 1245 if (scb->flags & SCB_ERROR) 1246 xs->error = XS_DRIVER_STUFFUP; 1247 } 1248 sea_free_scb(sea, scb, xs->xs_control); 1249 scsipi_done(xs); 1250 } 1251 1252 /* 1253 * Wait for completion of command in polled mode. 1254 */ 1255 int 1256 sea_poll(sea, xs, count) 1257 struct sea_softc *sea; 1258 struct scsipi_xfer *xs; 1259 int count; 1260 { 1261 int s; 1262 1263 while (count) { 1264 /* try to do something */ 1265 s = splbio(); 1266 if (!main_running) 1267 sea_main(); 1268 splx(s); 1269 if (xs->xs_status & XS_STS_DONE) 1270 return 0; 1271 delay(1000); 1272 count--; 1273 } 1274 return 1; 1275 } 1276 1277 /* 1278 * Do the transfer. We know we are connected. Update the flags, and call 1279 * sea_done() when task accomplished. Dialog controlled by the target. 1280 */ 1281 void 1282 sea_information_transfer(sea) 1283 struct sea_softc *sea; 1284 { 1285 int timeout; 1286 u_char msgout = MSG_NOOP; 1287 int len; 1288 int s; 1289 u_char *data; 1290 u_char phase, tmp, old_phase = PH_INVALID; 1291 struct sea_scb *scb = sea->nexus; 1292 int loop; 1293 1294 for (timeout = 0; timeout < 10000000L; timeout++) { 1295 tmp = STATUS; 1296 if (tmp & STAT_PARITY) 1297 printf("%s: parity error detected\n", 1298 sea->sc_dev.dv_xname); 1299 if (!(tmp & STAT_BSY)) { 1300 for (loop = 0; loop < 20; loop++) 1301 if ((tmp = STATUS) & STAT_BSY) 1302 break; 1303 if (!(tmp & STAT_BSY)) { 1304 printf("%s: !STAT_BSY unit in data transfer!\n", 1305 sea->sc_dev.dv_xname); 1306 s = splbio(); 1307 sea->nexus = NULL; 1308 scb->flags = SCB_ERROR; 1309 splx(s); 1310 sea_done(sea, scb); 1311 return; 1312 } 1313 } 1314 1315 /* we only have a valid SCSI phase when REQ is asserted */ 1316 if (!(tmp & STAT_REQ)) 1317 continue; 1318 1319 if (sea->type == FDOMAIN840) 1320 tmp = ((tmp & 0x08) >> 2) | 1321 ((tmp & 0x02) << 2) | 1322 (tmp & 0xf5); 1323 phase = tmp & PH_MASK; 1324 if (phase != old_phase) 1325 old_phase = phase; 1326 1327 switch (phase) { 1328 case PH_DATAOUT: 1329 #ifdef SEA_NODATAOUT 1330 printf("%s: SEA_NODATAOUT set, attempted DATAOUT aborted\n", 1331 sea->sc_dev.dv_xname); 1332 msgout = MSG_ABORT; 1333 CONTROL = BASE_CMD | CMD_ATTN; 1334 break; 1335 #endif 1336 case PH_DATAIN: 1337 if (!scb->data) 1338 printf("no data address!\n"); 1339 #ifdef SEA_BLINDTRANSFER 1340 if (scb->datalen && !(scb->datalen % BLOCK_SIZE)) { 1341 while (scb->datalen) { 1342 for (loop = 0; loop < 50000; loop++) 1343 if ((tmp = STATUS) & STAT_REQ) 1344 break; 1345 if (!(tmp & STAT_REQ)) { 1346 printf("%s: timeout waiting for STAT_REQ\n", 1347 sea->sc_dev.dv_xname); 1348 /* XXX Do something? */ 1349 } 1350 if (sea->type == FDOMAIN840) 1351 tmp = ((tmp & 0x08) >> 2) | 1352 ((tmp & 0x02) << 2) | 1353 (tmp & 0xf5); 1354 if ((tmp & PH_MASK) != phase) 1355 break; 1356 if (!(phase & STAT_IO)) { 1357 #ifdef SEA_ASSEMBLER 1358 caddr_t junk; 1359 asm("cld\n\t\ 1360 rep\n\t\ 1361 movsl" : 1362 "=S" (scb->data), 1363 "=c" (len), 1364 "=D" (junk) : 1365 "0" (scb->data), 1366 "1" (BLOCK_SIZE >> 2), 1367 "2" (sea->maddr_dr)); 1368 #else 1369 for (len = BLOCK_SIZE; 1370 len; len--) 1371 DATA = *(scb->data++); 1372 #endif 1373 } else { 1374 #ifdef SEA_ASSEMBLER 1375 caddr_t junk; 1376 asm("cld\n\t\ 1377 rep\n\t\ 1378 movsl" : 1379 "=D" (scb->data), 1380 "=c" (len), 1381 "=S" (junk) : 1382 "0" (scb->data), 1383 "1" (BLOCK_SIZE >> 2), 1384 "2" (sea->maddr_dr)); 1385 #else 1386 for (len = BLOCK_SIZE; 1387 len; len--) 1388 *(scb->data++) = DATA; 1389 #endif 1390 } 1391 scb->datalen -= BLOCK_SIZE; 1392 } 1393 } 1394 #endif 1395 if (scb->datalen) 1396 sea_transfer_pio(sea, &phase, &scb->datalen, 1397 &scb->data); 1398 break; 1399 case PH_MSGIN: 1400 /* Multibyte messages should not be present here. */ 1401 len = 1; 1402 data = &tmp; 1403 sea_transfer_pio(sea, &phase, &len, &data); 1404 /* scb->MessageIn = tmp; */ 1405 1406 switch (tmp) { 1407 case MSG_ABORT: 1408 scb->flags = SCB_ABORTED; 1409 printf("sea: command aborted by target\n"); 1410 CONTROL = BASE_CMD; 1411 sea_done(sea, scb); 1412 return; 1413 case MSG_CMDCOMPLETE: 1414 s = splbio(); 1415 sea->nexus = NULL; 1416 splx(s); 1417 sea->busy[scb->xs->xs_periph->periph_target] &= 1418 ~(1 << scb->xs->xs_periph->periph_lun); 1419 CONTROL = BASE_CMD; 1420 sea_done(sea, scb); 1421 return; 1422 case MSG_MESSAGE_REJECT: 1423 printf("%s: message_reject received\n", 1424 sea->sc_dev.dv_xname); 1425 break; 1426 case MSG_DISCONNECT: 1427 s = splbio(); 1428 TAILQ_INSERT_TAIL(&sea->nexus_list, 1429 scb, chain); 1430 sea->nexus = NULL; 1431 CONTROL = BASE_CMD; 1432 splx(s); 1433 return; 1434 case MSG_SAVEDATAPOINTER: 1435 case MSG_RESTOREPOINTERS: 1436 /* save/restore of pointers are ignored */ 1437 break; 1438 default: 1439 /* 1440 * This should be handled in the pio data 1441 * transfer phase, as the ATN should be raised 1442 * before ACK goes false when rejecting a 1443 * message. 1444 */ 1445 printf("%s: unknown message in: %x\n", 1446 sea->sc_dev.dv_xname, tmp); 1447 break; 1448 } /* switch (tmp) */ 1449 break; 1450 case PH_MSGOUT: 1451 len = 1; 1452 data = &msgout; 1453 /* sea->last_message = msgout; */ 1454 sea_transfer_pio(sea, &phase, &len, &data); 1455 if (msgout == MSG_ABORT) { 1456 printf("%s: sent message abort to target\n", 1457 sea->sc_dev.dv_xname); 1458 s = splbio(); 1459 sea->busy[scb->xs->xs_periph->periph_target] &= 1460 ~(1 << scb->xs->xs_periph->periph_lun); 1461 sea->nexus = NULL; 1462 scb->flags = SCB_ABORTED; 1463 splx(s); 1464 /* enable interrupt from scsi */ 1465 sea_done(sea, scb); 1466 return; 1467 } 1468 msgout = MSG_NOOP; 1469 break; 1470 case PH_CMD: 1471 len = scb->xs->cmdlen; 1472 data = (char *) scb->xs->cmd; 1473 sea_transfer_pio(sea, &phase, &len, &data); 1474 break; 1475 case PH_STAT: 1476 len = 1; 1477 data = &tmp; 1478 sea_transfer_pio(sea, &phase, &len, &data); 1479 scb->xs->status = tmp; 1480 break; 1481 default: 1482 printf("sea: unknown phase\n"); 1483 } /* switch (phase) */ 1484 } /* for (...) */ 1485 1486 /* If we get here we have got a timeout! */ 1487 printf("%s: timeout in data transfer\n", sea->sc_dev.dv_xname); 1488 scb->flags = SCB_TIMEOUT; 1489 /* XXX Should I clear scsi-bus state? */ 1490 sea_done(sea, scb); 1491 } 1492