1 /* $NetBSD: seagate.c,v 1.34 1999/09/30 23:04:41 thorpej 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/types.h> 68 #include <sys/param.h> 69 #include <sys/systm.h> 70 #include <sys/kernel.h> 71 #include <sys/errno.h> 72 #include <sys/ioctl.h> 73 #include <sys/device.h> 74 #include <sys/buf.h> 75 #include <sys/proc.h> 76 #include <sys/user.h> 77 #include <sys/queue.h> 78 #include <sys/malloc.h> 79 80 #include <machine/intr.h> 81 #include <machine/pio.h> 82 83 #include <dev/scsipi/scsi_all.h> 84 #include <dev/scsipi/scsipi_all.h> 85 #include <dev/scsipi/scsi_message.h> 86 #include <dev/scsipi/scsiconf.h> 87 88 #include <dev/isa/isareg.h> 89 #include <dev/isa/isavar.h> /* XXX USES ISA HOLE DIRECTLY */ 90 91 #define SEA_SCB_MAX 32 /* allow maximally 8 scsi control blocks */ 92 #define SCB_TABLE_SIZE 8 /* start with 8 scb entries in table */ 93 #define BLOCK_SIZE 512 /* size of READ/WRITE areas on SCSI card */ 94 95 /* 96 * defining SEA_BLINDTRANSFER will make DATA IN and DATA OUT to be done with 97 * blind transfers, i.e. no check is done for scsi phase changes. This will 98 * result in data loss if the scsi device does not send its data using 99 * BLOCK_SIZE bytes at a time. 100 * If SEA_BLINDTRANSFER defined and SEA_ASSEMBLER also defined will result in 101 * the use of blind transfers coded in assembler. SEA_ASSEMBLER is no good 102 * without SEA_BLINDTRANSFER defined. 103 */ 104 #define SEA_BLINDTRANSFER /* do blind transfers */ 105 #define SEA_ASSEMBLER /* Use assembly code for fast transfers */ 106 107 /* 108 * defining SEA_NOMSGS causes messages not to be used (thereby disabling 109 * disconnects) 110 */ 111 #undef SEA_NOMSGS 112 113 /* 114 * defining SEA_NODATAOUT makes dataout phase being aborted 115 */ 116 #undef SEA_NODATAOUT 117 118 /* Debugging definitions. Should not be used unless you want a lot of 119 printouts even under normal conditions */ 120 121 #undef SEA_DEBUGQUEUE /* Display info about queue-lengths */ 122 123 /******************************* board definitions **************************/ 124 /* 125 * CONTROL defines 126 */ 127 #define CMD_RST 0x01 /* scsi reset */ 128 #define CMD_SEL 0x02 /* scsi select */ 129 #define CMD_BSY 0x04 /* scsi busy */ 130 #define CMD_ATTN 0x08 /* scsi attention */ 131 #define CMD_START_ARB 0x10 /* start arbitration bit */ 132 #define CMD_EN_PARITY 0x20 /* enable scsi parity generation */ 133 #define CMD_INTR 0x40 /* enable scsi interrupts */ 134 #define CMD_DRVR_ENABLE 0x80 /* scsi enable */ 135 136 /* 137 * STATUS 138 */ 139 #define STAT_BSY 0x01 /* scsi busy */ 140 #define STAT_MSG 0x02 /* scsi msg */ 141 #define STAT_IO 0x04 /* scsi I/O */ 142 #define STAT_CD 0x08 /* scsi C/D */ 143 #define STAT_REQ 0x10 /* scsi req */ 144 #define STAT_SEL 0x20 /* scsi select */ 145 #define STAT_PARITY 0x40 /* parity error bit */ 146 #define STAT_ARB_CMPL 0x80 /* arbitration complete bit */ 147 148 /* 149 * REQUESTS 150 */ 151 #define PH_DATAOUT (0) 152 #define PH_DATAIN (STAT_IO) 153 #define PH_CMD (STAT_CD) 154 #define PH_STAT (STAT_CD | STAT_IO) 155 #define PH_MSGOUT (STAT_MSG | STAT_CD) 156 #define PH_MSGIN (STAT_MSG | STAT_CD | STAT_IO) 157 158 #define PH_MASK (STAT_MSG | STAT_CD | STAT_IO) 159 160 #define PH_INVALID 0xff 161 162 #define SEA_RAMOFFSET 0x00001800 163 164 #define BASE_CMD (CMD_INTR | CMD_EN_PARITY) 165 166 #define SEAGATE 1 /* Seagate ST0[12] */ 167 #define FDOMAIN 2 /* Future Domain TMC-{885,950} */ 168 #define FDOMAIN840 3 /* Future Domain TMC-{84[01],88[01]} */ 169 170 /******************************************************************************/ 171 172 /* scsi control block used to keep info about a scsi command */ 173 struct sea_scb { 174 u_char *data; /* position in data buffer so far */ 175 int datalen; /* bytes remaining to transfer */ 176 TAILQ_ENTRY(sea_scb) chain; 177 struct scsipi_xfer *xs; /* the scsipi_xfer for this cmd */ 178 int flags; /* status of the instruction */ 179 #define SCB_FREE 0 180 #define SCB_ACTIVE 1 181 #define SCB_ABORTED 2 182 #define SCB_TIMEOUT 4 183 #define SCB_ERROR 8 184 }; 185 186 /* 187 * data structure describing current status of the scsi bus. One for each 188 * controller card. 189 */ 190 struct sea_softc { 191 struct device sc_dev; 192 void *sc_ih; 193 194 int type; /* board type */ 195 caddr_t maddr; /* Base address for card */ 196 caddr_t maddr_cr_sr; /* Address of control and status reg */ 197 caddr_t maddr_dr; /* Address of data register */ 198 199 struct scsipi_link sc_link; /* prototype for subdevs */ 200 struct scsipi_adapter sc_adapter; 201 TAILQ_HEAD(, sea_scb) free_list, ready_list, nexus_list; 202 struct sea_scb *nexus; /* currently connected command */ 203 int numscbs; /* number of scsi control blocks */ 204 struct sea_scb scb[SCB_TABLE_SIZE]; 205 206 int our_id; /* our scsi id */ 207 u_char our_id_mask; 208 volatile u_char busy[8]; /* index=target, bit=lun, Keep track of 209 busy luns at device target */ 210 }; 211 212 /* flag showing if main routine is running. */ 213 static volatile int main_running = 0; 214 215 #define STATUS (*(volatile u_char *)sea->maddr_cr_sr) 216 #define CONTROL STATUS 217 #define DATA (*(volatile u_char *)sea->maddr_dr) 218 219 /* 220 * These are "special" values for the tag parameter passed to sea_select 221 * Not implemented right now. 222 */ 223 #define TAG_NEXT -1 /* Use next free tag */ 224 #define TAG_NONE -2 /* 225 * Establish I_T_L nexus instead of I_T_L_Q 226 * even on SCSI-II devices. 227 */ 228 229 typedef struct { 230 char *signature; 231 int offset, length; 232 int type; 233 } BiosSignature; 234 235 /* 236 * Signatures for automatic recognition of board type 237 */ 238 static const BiosSignature signatures[] = { 239 {"ST01 v1.7 (C) Copyright 1987 Seagate", 15, 37, SEAGATE}, 240 {"SCSI BIOS 2.00 (C) Copyright 1987 Seagate", 15, 40, SEAGATE}, 241 242 /* 243 * The following two lines are NOT mistakes. One detects ROM revision 244 * 3.0.0, the other 3.2. Since seagate has only one type of SCSI adapter, 245 * and this is not going to change, the "SEAGATE" and "SCSI" together 246 * are probably "good enough" 247 */ 248 {"SEAGATE SCSI BIOS ", 16, 17, SEAGATE}, 249 {"SEAGATE SCSI BIOS ", 17, 17, SEAGATE}, 250 251 /* 252 * However, future domain makes several incompatible SCSI boards, so specific 253 * signatures must be used. 254 */ 255 {"FUTURE DOMAIN CORP. (C) 1986-1989 V5.0C2/14/89", 5, 45, FDOMAIN}, 256 {"FUTURE DOMAIN CORP. (C) 1986-1989 V6.0A7/28/89", 5, 46, FDOMAIN}, 257 {"FUTURE DOMAIN CORP. (C) 1986-1990 V6.0105/31/90",5, 47, FDOMAIN}, 258 {"FUTURE DOMAIN CORP. (C) 1986-1990 V6.0209/18/90",5, 47, FDOMAIN}, 259 {"FUTURE DOMAIN CORP. (C) 1986-1990 V7.009/18/90", 5, 46, FDOMAIN}, 260 {"FUTURE DOMAIN CORP. (C) 1992 V8.00.004/02/92", 5, 44, FDOMAIN}, 261 {"FUTURE DOMAIN TMC-950", 5, 21, FDOMAIN}, 262 }; 263 264 #define nsignatures (sizeof(signatures) / sizeof(signatures[0])) 265 266 #ifdef notdef 267 static const char *bases[] = { 268 (char *) 0xc8000, (char *) 0xca000, (char *) 0xcc000, 269 (char *) 0xce000, (char *) 0xdc000, (char *) 0xde000 270 }; 271 272 #define nbases (sizeof(bases) / sizeof(bases[0])) 273 #endif 274 275 int seaintr __P((void *)); 276 int sea_scsi_cmd __P((struct scsipi_xfer *)); 277 void sea_timeout __P((void *)); 278 void sea_done __P((struct sea_softc *, struct sea_scb *)); 279 struct sea_scb *sea_get_scb __P((struct sea_softc *, int)); 280 void sea_free_scb __P((struct sea_softc *, struct sea_scb *, int)); 281 static void sea_main __P((void)); 282 static void sea_information_transfer __P((struct sea_softc *)); 283 int sea_poll __P((struct sea_softc *, struct scsipi_xfer *, int)); 284 void sea_init __P((struct sea_softc *)); 285 void sea_send_scb __P((struct sea_softc *sea, struct sea_scb *scb)); 286 void sea_reselect __P((struct sea_softc *sea)); 287 int sea_select __P((struct sea_softc *sea, struct sea_scb *scb)); 288 int sea_transfer_pio __P((struct sea_softc *sea, u_char *phase, 289 int *count, u_char **data)); 290 int sea_abort __P((struct sea_softc *, struct sea_scb *scb)); 291 292 /* the below structure is so we have a default dev struct for our link struct */ 293 struct scsipi_device sea_dev = { 294 NULL, /* use default error handler */ 295 NULL, /* have a queue, served by this */ 296 NULL, /* have no async handler */ 297 NULL, /* Use default 'done' routine */ 298 }; 299 300 int seaprobe __P((struct device *, struct cfdata *, void *)); 301 void seaattach __P((struct device *, struct device *, void *)); 302 303 struct cfattach sea_ca = { 304 sizeof(struct sea_softc), seaprobe, seaattach 305 }; 306 307 extern struct cfdriver sea_cd; 308 309 #ifdef SEA_DEBUGQUEUE 310 void 311 sea_queue_length(sea) 312 struct sea_softc *sea; 313 { 314 struct sea_scb *scb; 315 int connected, issued, disconnected; 316 317 connected = sea->nexus ? 1 : 0; 318 for (scb = sea->ready_list.tqh_first, issued = 0; scb; 319 scb = scb->chain.tqe_next, issued++); 320 for (scb = sea->nexus_list.tqh_first, disconnected = 0; scb; 321 scb = scb->chain.tqe_next, disconnected++); 322 printf("%s: length: %d/%d/%d\n", sea->sc_dev.dv_xname, connected, 323 issued, disconnected); 324 } 325 #endif 326 327 /* 328 * Check if the device can be found at the port given and if so, detect the 329 * type the type of board. Set it up ready for further work. Takes the isa_dev 330 * structure from autoconf as an argument. 331 * Returns 1 if card recognized, 0 if errors. 332 */ 333 int 334 seaprobe(parent, match, aux) 335 struct device *parent; 336 struct cfdata *match; 337 void *aux; 338 { 339 struct isa_attach_args *ia = aux; 340 int i, type = 0; 341 caddr_t maddr; 342 343 /* 344 * Could try to find a board by looking through all possible addresses. 345 * This is not done the right way now, because I have not found a way 346 * to get a boards virtual memory address given its physical. There is 347 * a function that returns the physical address for a given virtual 348 * address, but not the other way around. 349 */ 350 351 if (ia->ia_maddr == MADDRUNK) { 352 /* XXX */ 353 return 0; 354 } else 355 maddr = ISA_HOLE_VADDR(ia->ia_maddr); 356 357 /* check board type */ /* No way to define this through config */ 358 for (i = 0; i < nsignatures; i++) 359 if (!bcmp(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 0x%x\n", 374 ia->ia_maddr); 375 #endif 376 return 0; 377 } 378 379 ia->ia_drq = DRQUNK; 380 ia->ia_msize = 0x2000; 381 ia->ia_iosize = 0; 382 return 1; 383 } 384 385 /* 386 * Attach all sub-devices we can find 387 */ 388 void 389 seaattach(parent, self, aux) 390 struct device *parent, *self; 391 void *aux; 392 { 393 struct isa_attach_args *ia = aux; 394 struct sea_softc *sea = (void *)self; 395 int i; 396 397 sea->maddr = ISA_HOLE_VADDR(ia->ia_maddr); 398 399 /* check board type */ /* No way to define this through config */ 400 for (i = 0; i < nsignatures; i++) 401 if (!bcmp(sea->maddr + signatures[i].offset, 402 signatures[i].signature, signatures[i].length)) { 403 sea->type = signatures[i].type; 404 break; 405 } 406 407 /* Find controller and data memory addresses */ 408 switch (sea->type) { 409 case SEAGATE: 410 case FDOMAIN840: 411 sea->maddr_cr_sr = 412 (void *) (((u_char *)sea->maddr) + 0x1a00); 413 sea->maddr_dr = 414 (void *) (((u_char *)sea->maddr) + 0x1c00); 415 break; 416 case FDOMAIN: 417 sea->maddr_cr_sr = 418 (void *) (((u_char *)sea->maddr) + 0x1c00); 419 sea->maddr_dr = 420 (void *) (((u_char *)sea->maddr) + 0x1e00); 421 break; 422 default: 423 #ifdef DEBUG 424 printf("%s: board type unknown at address 0x%x\n", 425 sea->sc_dev.dv_xname, ia->ia_maddr); 426 #endif 427 return; 428 } 429 430 /* Test controller RAM (works the same way on future domain cards?) */ 431 *((u_char *)sea->maddr + SEA_RAMOFFSET) = 0xa5; 432 *((u_char *)sea->maddr + SEA_RAMOFFSET + 1) = 0x5a; 433 434 if ((*((u_char *)sea->maddr + SEA_RAMOFFSET) != 0xa5) || 435 (*((u_char *)sea->maddr + SEA_RAMOFFSET + 1) != 0x5a)) { 436 printf("%s: board RAM failure\n", sea->sc_dev.dv_xname); 437 return; 438 } 439 440 sea_init(sea); 441 442 /* 443 * Fill in the adapter. 444 */ 445 sea->sc_adapter.scsipi_cmd = sea_scsi_cmd; 446 sea->sc_adapter.scsipi_minphys = minphys; 447 448 /* 449 * fill in the prototype scsipi_link. 450 */ 451 sea->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE; 452 sea->sc_link.adapter_softc = sea; 453 sea->sc_link.scsipi_scsi.adapter_target = sea->our_id; 454 sea->sc_link.adapter = &sea->sc_adapter; 455 sea->sc_link.device = &sea_dev; 456 sea->sc_link.openings = 1; 457 sea->sc_link.scsipi_scsi.max_target = 7; 458 sea->sc_link.scsipi_scsi.max_lun = 7; 459 sea->sc_link.type = BUS_SCSI; 460 461 printf("\n"); 462 463 sea->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE, 464 IPL_BIO, seaintr, sea); 465 466 /* 467 * ask the adapter what subunits are present 468 */ 469 config_found(self, &sea->sc_link, scsiprint); 470 } 471 472 /* 473 * Catch an interrupt from the adaptor 474 */ 475 int 476 seaintr(arg) 477 void *arg; 478 { 479 struct sea_softc *sea = arg; 480 481 #ifdef DEBUG /* extra overhead, and only needed for intr debugging */ 482 if ((STATUS & STAT_PARITY) == 0 && 483 (STATUS & (STAT_SEL | STAT_IO)) != (STAT_SEL | STAT_IO)) 484 return 0; 485 #endif 486 487 loop: 488 /* dispatch to appropriate routine if found and done=0 */ 489 /* should check to see that this card really caused the interrupt */ 490 491 if (STATUS & STAT_PARITY) { 492 /* Parity error interrupt */ 493 printf("%s: parity error\n", sea->sc_dev.dv_xname); 494 return 1; 495 } 496 497 if ((STATUS & (STAT_SEL | STAT_IO)) == (STAT_SEL | STAT_IO)) { 498 /* Reselect interrupt */ 499 sea_reselect(sea); 500 if (!main_running) 501 sea_main(); 502 goto loop; 503 } 504 505 return 1; 506 } 507 508 /* 509 * Setup data structures, and reset the board and the SCSI bus. 510 */ 511 void 512 sea_init(sea) 513 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 int 555 sea_scsi_cmd(xs) 556 struct scsipi_xfer *xs; 557 { 558 struct scsipi_link *sc_link = xs->sc_link; 559 struct sea_softc *sea = sc_link->adapter_softc; 560 struct sea_scb *scb; 561 int flags; 562 int s; 563 564 SC_DEBUG(sc_link, SDEV_DB2, ("sea_scsi_cmd\n")); 565 566 flags = xs->xs_control; 567 if ((scb = sea_get_scb(sea, flags)) == NULL) { 568 xs->error = XS_DRIVER_STUFFUP; 569 return TRY_AGAIN_LATER; 570 } 571 scb->flags = SCB_ACTIVE; 572 scb->xs = xs; 573 574 if (flags & XS_CTL_RESET) { 575 /* 576 * Try to send a reset command to the card. 577 * XXX Not implemented. 578 */ 579 printf("%s: resetting\n", sea->sc_dev.dv_xname); 580 xs->error = XS_DRIVER_STUFFUP; 581 return COMPLETE; 582 } 583 584 /* 585 * Put all the arguments for the xfer in the scb 586 */ 587 scb->datalen = xs->datalen; 588 scb->data = xs->data; 589 590 #ifdef SEA_DEBUGQUEUE 591 sea_queue_length(sea); 592 #endif 593 594 s = splbio(); 595 596 sea_send_scb(sea, scb); 597 598 /* 599 * Usually return SUCCESSFULLY QUEUED 600 */ 601 if ((flags & XS_CTL_POLL) == 0) { 602 timeout(sea_timeout, scb, (xs->timeout * hz) / 1000); 603 splx(s); 604 return SUCCESSFULLY_QUEUED; 605 } 606 607 splx(s); 608 609 /* 610 * If we can't use interrupts, poll on completion 611 */ 612 if (sea_poll(sea, xs, xs->timeout)) { 613 sea_timeout(scb); 614 if (sea_poll(sea, xs, 2000)) 615 sea_timeout(scb); 616 } 617 return COMPLETE; 618 } 619 620 /* 621 * Get a free scb. If there are none, see if we can allocate a new one. If so, 622 * put it in the hash table too; otherwise return an error or sleep. 623 */ 624 struct sea_scb * 625 sea_get_scb(sea, flags) 626 struct sea_softc *sea; 627 int flags; 628 { 629 int s; 630 struct sea_scb *scb; 631 632 s = splbio(); 633 634 /* 635 * If we can and have to, sleep waiting for one to come free 636 * but only if we can't allocate a new one. 637 */ 638 for (;;) { 639 scb = sea->free_list.tqh_first; 640 if (scb) { 641 TAILQ_REMOVE(&sea->free_list, scb, chain); 642 break; 643 } 644 if (sea->numscbs < SEA_SCB_MAX) { 645 scb = (struct sea_scb *) malloc(sizeof(struct sea_scb), 646 M_TEMP, M_NOWAIT); 647 if (scb) { 648 bzero(scb, sizeof(struct sea_scb)); 649 sea->numscbs++; 650 } else 651 printf("%s: can't malloc scb\n", 652 sea->sc_dev.dv_xname); 653 break; 654 } 655 if ((flags & XS_CTL_NOSLEEP) != 0) 656 break; 657 tsleep(&sea->free_list, PRIBIO, "seascb", 0); 658 } 659 660 splx(s); 661 return scb; 662 } 663 664 /* 665 * Try to send this command to the board. Because this board does not use any 666 * mailboxes, this routine simply adds the command to the queue held by the 667 * sea_softc structure. 668 * A check is done to see if the command contains a REQUEST_SENSE command, and 669 * if so the command is put first in the queue, otherwise the command is added 670 * to the end of the queue. ?? Not correct ?? 671 */ 672 void 673 sea_send_scb(sea, scb) 674 struct sea_softc *sea; 675 struct sea_scb *scb; 676 { 677 678 TAILQ_INSERT_TAIL(&sea->ready_list, scb, chain); 679 /* Try to do some work on the card. */ 680 if (!main_running) 681 sea_main(); 682 } 683 684 /* 685 * Coroutine that runs as long as more work can be done on the seagate host 686 * adapter in a system. Both sea_scsi_cmd and sea_intr will try to start it in 687 * case it is not running. 688 */ 689 void 690 sea_main() 691 { 692 struct sea_softc *sea; 693 struct sea_scb *scb; 694 int done; 695 int unit; 696 int s; 697 698 main_running = 1; 699 700 /* 701 * This should not be run with interrupts disabled, but use the splx 702 * code instead. 703 */ 704 loop: 705 done = 1; 706 for (unit = 0; unit < sea_cd.cd_ndevs; unit++) { 707 sea = sea_cd.cd_devs[unit]; 708 if (!sea) 709 continue; 710 s = splbio(); 711 if (!sea->nexus) { 712 /* 713 * Search through the ready_list for a command 714 * destined for a target that's not busy. 715 */ 716 for (scb = sea->ready_list.tqh_first; scb; 717 scb = scb->chain.tqe_next) { 718 if (!(sea->busy[scb->xs->sc_link->scsipi_scsi.target] & 719 (1 << scb->xs->sc_link->scsipi_scsi.lun))) { 720 TAILQ_REMOVE(&sea->ready_list, scb, 721 chain); 722 723 /* Re-enable interrupts. */ 724 splx(s); 725 726 /* 727 * Attempt to establish an I_T_L nexus. 728 * On success, sea->nexus is set. 729 * On failure, we must add the command 730 * back to the issue queue so we can 731 * keep trying. 732 */ 733 734 /* 735 * REQUEST_SENSE commands are issued 736 * without tagged queueing, even on 737 * SCSI-II devices because the 738 * contingent alligence condition 739 * exists for the entire unit. 740 */ 741 742 /* 743 * First check that if any device has 744 * tried a reconnect while we have done 745 * other things with interrupts 746 * disabled. 747 */ 748 749 if ((STATUS & (STAT_SEL | STAT_IO)) == 750 (STAT_SEL | STAT_IO)) { 751 sea_reselect(sea); 752 break; 753 } 754 if (sea_select(sea, scb)) { 755 s = splbio(); 756 TAILQ_INSERT_HEAD(&sea->ready_list, 757 scb, chain); 758 splx(s); 759 } else 760 break; 761 } /* if target/lun is not busy */ 762 } /* for scb */ 763 if (!sea->nexus) { 764 /* check for reselection phase */ 765 if ((STATUS & (STAT_SEL | STAT_IO)) == 766 (STAT_SEL | STAT_IO)) { 767 sea_reselect(sea); 768 } 769 } 770 } /* if (!sea->nexus) */ 771 772 splx(s); 773 if (sea->nexus) { /* we are connected. Do the task */ 774 sea_information_transfer(sea); 775 done = 0; 776 } else 777 break; 778 } /* for instance */ 779 780 if (!done) 781 goto loop; 782 783 main_running = 0; 784 } 785 786 void 787 sea_free_scb(sea, scb, flags) 788 struct sea_softc *sea; 789 struct sea_scb *scb; 790 int flags; 791 { 792 int s; 793 794 s = splbio(); 795 796 scb->flags = SCB_FREE; 797 TAILQ_INSERT_HEAD(&sea->free_list, scb, chain); 798 799 /* 800 * If there were none, wake anybody waiting for one to come free, 801 * starting with queued entries. 802 */ 803 if (!scb->chain.tqe_next) 804 wakeup((caddr_t)&sea->free_list); 805 806 splx(s); 807 } 808 809 void 810 sea_timeout(arg) 811 void *arg; 812 { 813 struct sea_scb *scb = arg; 814 struct scsipi_xfer *xs = scb->xs; 815 struct scsipi_link *sc_link = xs->sc_link; 816 struct sea_softc *sea = sc_link->adapter_softc; 817 int s; 818 819 scsi_print_addr(sc_link); 820 printf("timed out"); 821 822 s = splbio(); 823 824 /* 825 * If it has been through before, then 826 * a previous abort has failed, don't 827 * try abort again 828 */ 829 if (scb->flags & SCB_ABORTED) { 830 /* abort timed out */ 831 printf(" AGAIN\n"); 832 scb->xs->retries = 0; 833 scb->flags |= SCB_ABORTED; 834 sea_done(sea, scb); 835 } else { 836 /* abort the operation that has timed out */ 837 printf("\n"); 838 scb->flags |= SCB_ABORTED; 839 sea_abort(sea, scb); 840 /* 2 secs for the abort */ 841 if ((xs->xs_control & XS_CTL_POLL) == 0) 842 timeout(sea_timeout, scb, 2 * hz); 843 } 844 845 splx(s); 846 } 847 848 void 849 sea_reselect(sea) 850 struct sea_softc *sea; 851 { 852 u_char target_mask; 853 int i; 854 u_char lun, phase; 855 u_char msg[3]; 856 int len; 857 u_char *data; 858 struct sea_scb *scb; 859 int abort = 0; 860 861 if (!((target_mask = STATUS) & STAT_SEL)) { 862 printf("%s: wrong state 0x%x\n", sea->sc_dev.dv_xname, 863 target_mask); 864 return; 865 } 866 867 /* wait for a device to win the reselection phase */ 868 /* signals this by asserting the I/O signal */ 869 for (i = 10; i && (STATUS & (STAT_SEL | STAT_IO | STAT_BSY)) != 870 (STAT_SEL | STAT_IO | 0); i--); 871 /* !! Check for timeout here */ 872 /* the data bus contains original initiator id ORed with target id */ 873 target_mask = DATA; 874 /* see that we really are the initiator */ 875 if (!(target_mask & sea->our_id_mask)) { 876 printf("%s: polled reselection was not for me: 0x%x\n", 877 sea->sc_dev.dv_xname, target_mask); 878 return; 879 } 880 /* find target who won */ 881 target_mask &= ~sea->our_id_mask; 882 /* host responds by asserting the BSY signal */ 883 CONTROL = BASE_CMD | CMD_DRVR_ENABLE | CMD_BSY; 884 /* target should respond by deasserting the SEL signal */ 885 for (i = 50000; i && (STATUS & STAT_SEL); i++); 886 /* remove the busy status */ 887 CONTROL = BASE_CMD | CMD_DRVR_ENABLE; 888 /* we are connected. Now we wait for the MSGIN condition */ 889 for (i = 50000; i && !(STATUS & STAT_REQ); i--); 890 /* !! Add timeout check here */ 891 /* hope we get an IDENTIFY message */ 892 len = 3; 893 data = msg; 894 phase = PH_MSGIN; 895 sea_transfer_pio(sea, &phase, &len, &data); 896 897 if (MSG_ISIDENTIFY(msg[0])) { 898 printf("%s: expecting IDENTIFY message, got 0x%x\n", 899 sea->sc_dev.dv_xname, msg[0]); 900 abort = 1; 901 scb = NULL; 902 } else { 903 lun = msg[0] & 0x07; 904 905 /* 906 * Find the command corresponding to the I_T_L or I_T_L_Q nexus 907 * we just reestablished, and remove it from the disconnected 908 * queue. 909 */ 910 for (scb = sea->nexus_list.tqh_first; scb; 911 scb = scb->chain.tqe_next) 912 if (target_mask == (1 << scb->xs->sc_link->scsipi_scsi.target) && 913 lun == scb->xs->sc_link->scsipi_scsi.lun) { 914 TAILQ_REMOVE(&sea->nexus_list, scb, 915 chain); 916 break; 917 } 918 if (!scb) { 919 printf("%s: target %02x lun %d not disconnected\n", 920 sea->sc_dev.dv_xname, target_mask, lun); 921 /* 922 * Since we have an established nexus that we can't do 923 * anything with, we must abort it. 924 */ 925 abort = 1; 926 } 927 } 928 929 if (abort) { 930 msg[0] = MSG_ABORT; 931 len = 1; 932 data = msg; 933 phase = PH_MSGOUT; 934 CONTROL = BASE_CMD | CMD_ATTN; 935 sea_transfer_pio(sea, &phase, &len, &data); 936 } else 937 sea->nexus = scb; 938 939 return; 940 } 941 942 /* 943 * Transfer data in given phase using polled I/O. 944 */ 945 int 946 sea_transfer_pio(sea, phase, count, data) 947 struct sea_softc *sea; 948 u_char *phase; 949 int *count; 950 u_char **data; 951 { 952 register u_char p = *phase, tmp; 953 register int c = *count; 954 register u_char *d = *data; 955 int timeout; 956 957 do { 958 /* 959 * Wait for assertion of REQ, after which the phase bits will 960 * be valid. 961 */ 962 for (timeout = 0; timeout < 50000; timeout++) 963 if ((tmp = STATUS) & STAT_REQ) 964 break; 965 if (!(tmp & STAT_REQ)) { 966 printf("%s: timeout waiting for STAT_REQ\n", 967 sea->sc_dev.dv_xname); 968 break; 969 } 970 971 /* 972 * Check for phase mismatch. Reached if the target decides 973 * that it has finished the transfer. 974 */ 975 if (sea->type == FDOMAIN840) 976 tmp = ((tmp & 0x08) >> 2) | 977 ((tmp & 0x02) << 2) | 978 (tmp & 0xf5); 979 if ((tmp & PH_MASK) != p) 980 break; 981 982 /* Do actual transfer from SCSI bus to/from memory. */ 983 if (!(p & STAT_IO)) 984 DATA = *d; 985 else 986 *d = DATA; 987 ++d; 988 989 /* 990 * The SCSI standard suggests that in MSGOUT phase, the 991 * initiator should drop ATN on the last byte of the message 992 * phase after REQ has been asserted for the handshake but 993 * before the initiator raises ACK. 994 * Don't know how to accomplish this on the ST01/02. 995 */ 996 997 #if 0 998 /* 999 * XXX 1000 * The st01 code doesn't wait for STAT_REQ to be deasserted. 1001 * Is this ok? 1002 */ 1003 for (timeout = 0; timeout < 200000L; timeout++) 1004 if (!(STATUS & STAT_REQ)) 1005 break; 1006 if (STATUS & STAT_REQ) 1007 printf("%s: timeout on wait for !STAT_REQ", 1008 sea->sc_dev.dv_xname); 1009 #endif 1010 } while (--c); 1011 1012 *count = c; 1013 *data = d; 1014 tmp = STATUS; 1015 if (tmp & STAT_REQ) 1016 *phase = tmp & PH_MASK; 1017 else 1018 *phase = PH_INVALID; 1019 1020 if (c && (*phase != p)) 1021 return -1; 1022 return 0; 1023 } 1024 1025 /* 1026 * Establish I_T_L or I_T_L_Q nexus for new or existing command including 1027 * ARBITRATION, SELECTION, and initial message out for IDENTIFY and queue 1028 * messages. Return -1 if selection could not execute for some reason, 0 if 1029 * selection succeded or failed because the target did not respond. 1030 */ 1031 int 1032 sea_select(sea, scb) 1033 struct sea_softc *sea; 1034 struct sea_scb *scb; 1035 { 1036 u_char msg[3], phase; 1037 u_char *data; 1038 int len; 1039 int timeout; 1040 1041 CONTROL = BASE_CMD; 1042 DATA = sea->our_id_mask; 1043 CONTROL = (BASE_CMD & ~CMD_INTR) | CMD_START_ARB; 1044 1045 /* wait for arbitration to complete */ 1046 for (timeout = 0; timeout < 3000000L; timeout++) 1047 if (STATUS & STAT_ARB_CMPL) 1048 break; 1049 if (!(STATUS & STAT_ARB_CMPL)) { 1050 if (STATUS & STAT_SEL) { 1051 printf("%s: arbitration lost\n", sea->sc_dev.dv_xname); 1052 scb->flags |= SCB_ERROR; 1053 } else { 1054 printf("%s: arbitration timeout\n", 1055 sea->sc_dev.dv_xname); 1056 scb->flags |= SCB_TIMEOUT; 1057 } 1058 CONTROL = BASE_CMD; 1059 return -1; 1060 } 1061 1062 delay(2); 1063 DATA = (u_char)((1 << scb->xs->sc_link->scsipi_scsi.target) | 1064 sea->our_id_mask); 1065 CONTROL = 1066 #ifdef SEA_NOMSGS 1067 (BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE | CMD_SEL; 1068 #else 1069 (BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE | CMD_SEL | CMD_ATTN; 1070 #endif 1071 delay(1); 1072 1073 /* wait for a bsy from target */ 1074 for (timeout = 0; timeout < 2000000L; timeout++) 1075 if (STATUS & STAT_BSY) 1076 break; 1077 if (!(STATUS & STAT_BSY)) { 1078 /* should return some error to the higher level driver */ 1079 CONTROL = BASE_CMD; 1080 scb->flags |= SCB_TIMEOUT; 1081 return 0; 1082 } 1083 1084 /* Try to make the target to take a message from us */ 1085 #ifdef SEA_NOMSGS 1086 CONTROL = (BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE; 1087 #else 1088 CONTROL = (BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE | CMD_ATTN; 1089 #endif 1090 delay(1); 1091 1092 /* should start a msg_out phase */ 1093 for (timeout = 0; timeout < 2000000L; timeout++) 1094 if (STATUS & STAT_REQ) 1095 break; 1096 /* Remove ATN. */ 1097 CONTROL = BASE_CMD | CMD_DRVR_ENABLE; 1098 if (!(STATUS & STAT_REQ)) { 1099 /* 1100 * This should not be taken as an error, but more like an 1101 * unsupported feature! Should set a flag indicating that the 1102 * target don't support messages, and continue without failure. 1103 * (THIS IS NOT AN ERROR!) 1104 */ 1105 } else { 1106 msg[0] = MSG_IDENTIFY(scb->xs->sc_link->scsipi_scsi.lun, 1); 1107 len = 1; 1108 data = msg; 1109 phase = PH_MSGOUT; 1110 /* Should do test on result of sea_transfer_pio(). */ 1111 sea_transfer_pio(sea, &phase, &len, &data); 1112 } 1113 if (!(STATUS & STAT_BSY)) 1114 printf("%s: after successful arbitrate: no STAT_BSY!\n", 1115 sea->sc_dev.dv_xname); 1116 1117 sea->nexus = scb; 1118 sea->busy[scb->xs->sc_link->scsipi_scsi.target] |= 1119 1 << scb->xs->sc_link->scsipi_scsi.lun; 1120 /* This assignment should depend on possibility to send a message to target. */ 1121 CONTROL = BASE_CMD | CMD_DRVR_ENABLE; 1122 /* XXX Reset pointer in command? */ 1123 return 0; 1124 } 1125 1126 /* 1127 * Send an abort to the target. Return 1 success, 0 on failure. 1128 */ 1129 int 1130 sea_abort(sea, scb) 1131 struct sea_softc *sea; 1132 struct sea_scb *scb; 1133 { 1134 struct sea_scb *tmp; 1135 u_char msg, phase, *msgptr; 1136 int len; 1137 1138 /* 1139 * If the command hasn't been issued yet, we simply remove it from the 1140 * issue queue 1141 * XXX Could avoid this loop. 1142 */ 1143 for (tmp = sea->ready_list.tqh_first; tmp; tmp = tmp->chain.tqe_next) 1144 if (scb == tmp) { 1145 TAILQ_REMOVE(&sea->ready_list, scb, chain); 1146 /* XXX Set some type of error result for operation. */ 1147 return 1; 1148 } 1149 1150 /* 1151 * If any commands are connected, we're going to fail the abort and let 1152 * the high level SCSI driver retry at a later time or issue a reset. 1153 */ 1154 if (sea->nexus) 1155 return 0; 1156 1157 /* 1158 * If the command is currently disconnected from the bus, and there are 1159 * no connected commands, we reconnect the I_T_L or I_T_L_Q nexus 1160 * associated with it, go into message out, and send an abort message. 1161 */ 1162 for (tmp = sea->nexus_list.tqh_first; tmp; 1163 tmp = tmp->chain.tqe_next) 1164 if (scb == tmp) { 1165 if (sea_select(sea, scb)) 1166 return 0; 1167 1168 msg = MSG_ABORT; 1169 msgptr = &msg; 1170 len = 1; 1171 phase = PH_MSGOUT; 1172 CONTROL = BASE_CMD | CMD_ATTN; 1173 sea_transfer_pio(sea, &phase, &len, &msgptr); 1174 1175 for (tmp = sea->nexus_list.tqh_first; tmp; 1176 tmp = tmp->chain.tqe_next) 1177 if (scb == tmp) { 1178 TAILQ_REMOVE(&sea->nexus_list, 1179 scb, chain); 1180 /* XXX Set some type of error result 1181 for the operation. */ 1182 return 1; 1183 } 1184 } 1185 1186 /* Command not found in any queue; race condition? */ 1187 return 1; 1188 } 1189 1190 void 1191 sea_done(sea, scb) 1192 struct sea_softc *sea; 1193 struct sea_scb *scb; 1194 { 1195 struct scsipi_xfer *xs = scb->xs; 1196 1197 untimeout(sea_timeout, scb); 1198 1199 xs->resid = scb->datalen; 1200 1201 /* XXXX need to get status */ 1202 if (scb->flags == SCB_ACTIVE) { 1203 xs->resid = 0; 1204 } else { 1205 if (scb->flags & (SCB_TIMEOUT | SCB_ABORTED)) 1206 xs->error = XS_TIMEOUT; 1207 if (scb->flags & SCB_ERROR) 1208 xs->error = XS_DRIVER_STUFFUP; 1209 } 1210 xs->xs_status |= XS_STS_DONE; 1211 sea_free_scb(sea, scb, xs->xs_control); 1212 scsipi_done(xs); 1213 } 1214 1215 /* 1216 * Wait for completion of command in polled mode. 1217 */ 1218 int 1219 sea_poll(sea, xs, count) 1220 struct sea_softc *sea; 1221 struct scsipi_xfer *xs; 1222 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(sea) 1246 struct sea_softc *sea; 1247 { 1248 int timeout; 1249 u_char msgout = MSG_NOOP; 1250 int len; 1251 int s; 1252 u_char *data; 1253 u_char phase, tmp, old_phase = PH_INVALID; 1254 struct sea_scb *scb = sea->nexus; 1255 int loop; 1256 1257 for (timeout = 0; timeout < 10000000L; timeout++) { 1258 tmp = STATUS; 1259 if (tmp & STAT_PARITY) 1260 printf("%s: parity error detected\n", 1261 sea->sc_dev.dv_xname); 1262 if (!(tmp & STAT_BSY)) { 1263 for (loop = 0; loop < 20; loop++) 1264 if ((tmp = STATUS) & STAT_BSY) 1265 break; 1266 if (!(tmp & STAT_BSY)) { 1267 printf("%s: !STAT_BSY unit in data transfer!\n", 1268 sea->sc_dev.dv_xname); 1269 s = splbio(); 1270 sea->nexus = NULL; 1271 scb->flags = SCB_ERROR; 1272 splx(s); 1273 sea_done(sea, scb); 1274 return; 1275 } 1276 } 1277 1278 /* we only have a valid SCSI phase when REQ is asserted */ 1279 if (!(tmp & STAT_REQ)) 1280 continue; 1281 1282 if (sea->type == FDOMAIN840) 1283 tmp = ((tmp & 0x08) >> 2) | 1284 ((tmp & 0x02) << 2) | 1285 (tmp & 0xf5); 1286 phase = tmp & PH_MASK; 1287 if (phase != old_phase) 1288 old_phase = phase; 1289 1290 switch (phase) { 1291 case PH_DATAOUT: 1292 #ifdef SEA_NODATAOUT 1293 printf("%s: SEA_NODATAOUT set, attempted DATAOUT aborted\n", 1294 sea->sc_dev.dv_xname); 1295 msgout = MSG_ABORT; 1296 CONTROL = BASE_CMD | CMD_ATTN; 1297 break; 1298 #endif 1299 case PH_DATAIN: 1300 if (!scb->data) 1301 printf("no data address!\n"); 1302 #ifdef SEA_BLINDTRANSFER 1303 if (scb->datalen && !(scb->datalen % BLOCK_SIZE)) { 1304 while (scb->datalen) { 1305 for (loop = 0; loop < 50000; loop++) 1306 if ((tmp = STATUS) & STAT_REQ) 1307 break; 1308 if (!(tmp & STAT_REQ)) { 1309 printf("%s: timeout waiting for STAT_REQ\n", 1310 sea->sc_dev.dv_xname); 1311 /* XXX Do something? */ 1312 } 1313 if (sea->type == FDOMAIN840) 1314 tmp = ((tmp & 0x08) >> 2) | 1315 ((tmp & 0x02) << 2) | 1316 (tmp & 0xf5); 1317 if ((tmp & PH_MASK) != phase) 1318 break; 1319 if (!(phase & STAT_IO)) { 1320 #ifdef SEA_ASSEMBLER 1321 asm("shr $2, %%ecx\n\t\ 1322 cld\n\t\ 1323 rep\n\t\ 1324 movsl" : 1325 "=S" (scb->data) : 1326 "0" (scb->data), 1327 "D" (sea->maddr_dr), 1328 "c" (BLOCK_SIZE) : 1329 "%ecx", "%edi"); 1330 #else 1331 for (count = 0; 1332 count < BLOCK_SIZE; 1333 count++) 1334 DATA = *(scb->data++); 1335 #endif 1336 } else { 1337 #ifdef SEA_ASSEMBLER 1338 asm("shr $2, %%ecx\n\t\ 1339 cld\n\t\ 1340 rep\n\t\ 1341 movsl" : 1342 "=D" (scb->data) : 1343 "S" (sea->maddr_dr), 1344 "0" (scb->data), 1345 "c" (BLOCK_SIZE) : 1346 "%ecx", "%esi"); 1347 #else 1348 for (count = 0; 1349 count < BLOCK_SIZE; 1350 count++) 1351 *(scb->data++) = DATA; 1352 #endif 1353 } 1354 scb->datalen -= BLOCK_SIZE; 1355 } 1356 } 1357 #endif 1358 if (scb->datalen) 1359 sea_transfer_pio(sea, &phase, &scb->datalen, 1360 &scb->data); 1361 break; 1362 case PH_MSGIN: 1363 /* Multibyte messages should not be present here. */ 1364 len = 1; 1365 data = &tmp; 1366 sea_transfer_pio(sea, &phase, &len, &data); 1367 /* scb->MessageIn = tmp; */ 1368 1369 switch (tmp) { 1370 case MSG_ABORT: 1371 scb->flags = SCB_ABORTED; 1372 printf("sea: command aborted by target\n"); 1373 CONTROL = BASE_CMD; 1374 sea_done(sea, scb); 1375 return; 1376 case MSG_CMDCOMPLETE: 1377 s = splbio(); 1378 sea->nexus = NULL; 1379 splx(s); 1380 sea->busy[scb->xs->sc_link->scsipi_scsi.target] &= 1381 ~(1 << scb->xs->sc_link->scsipi_scsi.lun); 1382 CONTROL = BASE_CMD; 1383 sea_done(sea, scb); 1384 return; 1385 case MSG_MESSAGE_REJECT: 1386 printf("%s: message_reject recieved\n", 1387 sea->sc_dev.dv_xname); 1388 break; 1389 case MSG_DISCONNECT: 1390 s = splbio(); 1391 TAILQ_INSERT_TAIL(&sea->nexus_list, 1392 scb, chain); 1393 sea->nexus = NULL; 1394 CONTROL = BASE_CMD; 1395 splx(s); 1396 return; 1397 case MSG_SAVEDATAPOINTER: 1398 case MSG_RESTOREPOINTERS: 1399 /* save/restore of pointers are ignored */ 1400 break; 1401 default: 1402 /* 1403 * This should be handled in the pio data 1404 * transfer phase, as the ATN should be raised 1405 * before ACK goes false when rejecting a 1406 * message. 1407 */ 1408 printf("%s: unknown message in: %x\n", 1409 sea->sc_dev.dv_xname, tmp); 1410 break; 1411 } /* switch (tmp) */ 1412 break; 1413 case PH_MSGOUT: 1414 len = 1; 1415 data = &msgout; 1416 /* sea->last_message = msgout; */ 1417 sea_transfer_pio(sea, &phase, &len, &data); 1418 if (msgout == MSG_ABORT) { 1419 printf("%s: sent message abort to target\n", 1420 sea->sc_dev.dv_xname); 1421 s = splbio(); 1422 sea->busy[scb->xs->sc_link->scsipi_scsi.target] &= 1423 ~(1 << scb->xs->sc_link->scsipi_scsi.lun); 1424 sea->nexus = NULL; 1425 scb->flags = SCB_ABORTED; 1426 splx(s); 1427 /* enable interrupt from scsi */ 1428 sea_done(sea, scb); 1429 return; 1430 } 1431 msgout = MSG_NOOP; 1432 break; 1433 case PH_CMD: 1434 len = scb->xs->cmdlen; 1435 data = (char *) scb->xs->cmd; 1436 sea_transfer_pio(sea, &phase, &len, &data); 1437 break; 1438 case PH_STAT: 1439 len = 1; 1440 data = &tmp; 1441 sea_transfer_pio(sea, &phase, &len, &data); 1442 scb->xs->status = tmp; 1443 break; 1444 default: 1445 printf("sea: unknown phase\n"); 1446 } /* switch (phase) */ 1447 } /* for (...) */ 1448 1449 /* If we get here we have got a timeout! */ 1450 printf("%s: timeout in data transfer\n", sea->sc_dev.dv_xname); 1451 scb->flags = SCB_TIMEOUT; 1452 /* XXX Should I clear scsi-bus state? */ 1453 sea_done(sea, scb); 1454 } 1455