seagate.c revision 1.71
1 /* $NetBSD: seagate.c,v 1.71 2012/10/27 17:18:25 chs Exp $ */ 2 3 /* 4 * ST01/02, Future Domain TMC-885, TMC-950 SCSI driver 5 * 6 * Copyright 1994, Charles M. Hannum (mycroft (at) ai.mit.edu) 7 * Copyright 1994, Kent Palmkvist (kentp (at) isy.liu.se) 8 * Copyright 1994, Robert Knier (rknier (at) qgraph.com) 9 * Copyright 1992, 1994 Drew Eckhardt (drew (at) colorado.edu) 10 * Copyright 1994, Julian Elischer (julian (at) tfs.com) 11 * 12 * Others that has contributed by example code is 13 * Glen Overby (overby (at) 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 1.71 2012/10/27 17:18:25 chs 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 device_t 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_NEW(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 = device_private(self); 390 struct scsipi_adapter *adapt = &sea->sc_adapter; 391 struct scsipi_channel *chan = &sea->sc_channel; 392 int i; 393 394 sea->sc_dev = self; 395 396 /* XXX XXX XXX */ 397 sea->maddr = ISA_HOLE_VADDR(ia->ia_iomem[0].ir_addr); 398 399 /* check board type */ /* No way to define this through config */ 400 for (i = 0; i < nsignatures; i++) 401 if (!memcmp((char *)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 %p\n", 425 device_xname(sea->sc_dev), sea->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 aprint_error_dev(sea->sc_dev, "board RAM failure\n"); 437 return; 438 } 439 440 sea_init(sea); 441 442 /* 443 * Fill in the scsipi_adapter. 444 */ 445 memset(adapt, 0, sizeof(*adapt)); 446 adapt->adapt_dev = sea->sc_dev; 447 adapt->adapt_nchannels = 1; 448 adapt->adapt_openings = sea->numscbs; 449 adapt->adapt_max_periph = 1; 450 adapt->adapt_request = sea_scsipi_request; 451 adapt->adapt_minphys = minphys; 452 453 /* 454 * Fill in the scsipi_channel. 455 */ 456 memset(chan, 0, sizeof(*chan)); 457 chan->chan_adapter = adapt; 458 chan->chan_bustype = &scsi_bustype; 459 chan->chan_channel = 0; 460 chan->chan_ntargets = 8; 461 chan->chan_nluns = 8; 462 chan->chan_id = sea->our_id; 463 chan->chan_flags = SCSIPI_CHAN_CANGROW; 464 465 printf("\n"); 466 467 sea->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 468 IST_EDGE, IPL_BIO, seaintr, sea); 469 470 /* 471 * ask the adapter what subunits are present 472 */ 473 config_found(self, &sea->sc_channel, scsiprint); 474 } 475 476 /* 477 * Catch an interrupt from the adaptor 478 */ 479 int 480 seaintr(void *arg) 481 { 482 struct sea_softc *sea = arg; 483 484 #ifdef DEBUG /* extra overhead, and only needed for intr debugging */ 485 if ((STATUS & STAT_PARITY) == 0 && 486 (STATUS & (STAT_SEL | STAT_IO)) != (STAT_SEL | STAT_IO)) 487 return 0; 488 #endif 489 490 loop: 491 /* dispatch to appropriate routine if found and done=0 */ 492 /* should check to see that this card really caused the interrupt */ 493 494 if (STATUS & STAT_PARITY) { 495 /* Parity error interrupt */ 496 aprint_error_dev(sea->sc_dev, "parity error\n"); 497 return 1; 498 } 499 500 if ((STATUS & (STAT_SEL | STAT_IO)) == (STAT_SEL | STAT_IO)) { 501 /* Reselect interrupt */ 502 sea_reselect(sea); 503 if (!main_running) 504 sea_main(); 505 goto loop; 506 } 507 508 return 1; 509 } 510 511 /* 512 * Setup data structures, and reset the board and the SCSI bus. 513 */ 514 void 515 sea_init(struct sea_softc *sea) 516 { 517 int i; 518 519 /* Reset the scsi bus (I don't know if this is needed */ 520 CONTROL = BASE_CMD | CMD_DRVR_ENABLE | CMD_RST; 521 delay(25); /* hold reset for at least 25 microseconds */ 522 CONTROL = BASE_CMD; 523 delay(10); /* wait a Bus Clear Delay (800 ns + bus free delay (800 ns) */ 524 525 /* Set our id (don't know anything about this) */ 526 switch (sea->type) { 527 case SEAGATE: 528 sea->our_id = 7; 529 break; 530 case FDOMAIN: 531 case FDOMAIN840: 532 sea->our_id = 6; 533 break; 534 } 535 sea->our_id_mask = 1 << sea->our_id; 536 537 /* init fields used by our routines */ 538 sea->nexus = 0; 539 TAILQ_INIT(&sea->ready_list); 540 TAILQ_INIT(&sea->nexus_list); 541 TAILQ_INIT(&sea->free_list); 542 for (i = 0; i < 8; i++) 543 sea->busy[i] = 0x00; 544 545 /* link up the free list of scbs */ 546 sea->numscbs = SCB_TABLE_SIZE; 547 for (i = 0; i < SCB_TABLE_SIZE; i++) { 548 TAILQ_INSERT_TAIL(&sea->free_list, &sea->scb[i], chain); 549 } 550 } 551 552 /* 553 * start a scsi operation given the command and the data address. Also needs 554 * the unit, target and lu. 555 */ 556 void 557 sea_scsipi_request(struct scsipi_channel *chan, scsipi_adapter_req_t req, void *arg) 558 { 559 struct scsipi_xfer *xs; 560 struct scsipi_periph *periph; 561 struct sea_softc *sea = device_private(chan->chan_adapter->adapt_dev); 562 struct sea_scb *scb; 563 int flags; 564 int s; 565 566 switch (req) { 567 case ADAPTER_REQ_RUN_XFER: 568 xs = arg; 569 periph = xs->xs_periph; 570 flags = xs->xs_control; 571 572 SC_DEBUG(periph, SCSIPI_DB2, ("sea_scsipi_requeset\n")); 573 574 /* XXX Reset not implemented. */ 575 if (flags & XS_CTL_RESET) { 576 printf("%s: resetting\n", device_xname(sea->sc_dev)); 577 xs->error = XS_DRIVER_STUFFUP; 578 scsipi_done(xs); 579 return; 580 } 581 582 /* Get an SCB to use. */ 583 scb = sea_get_scb(sea, flags); 584 #ifdef DIAGNOSTIC 585 /* 586 * This should never happen as we track the resources 587 * in the mid-layer. 588 */ 589 if (scb == NULL) { 590 scsipi_printaddr(periph); 591 printf("unable to allocate scb\n"); 592 panic("sea_scsipi_request"); 593 } 594 #endif 595 596 scb->flags = SCB_ACTIVE; 597 scb->xs = xs; 598 599 /* 600 * Put all the arguments for the xfer in the scb 601 */ 602 scb->datalen = xs->datalen; 603 scb->data = xs->data; 604 605 #ifdef SEA_DEBUGQUEUE 606 sea_queue_length(sea); 607 #endif 608 609 s = splbio(); 610 611 sea_send_scb(sea, scb); 612 613 if ((flags & XS_CTL_POLL) == 0) { 614 callout_reset(&scb->xs->xs_callout, 615 mstohz(xs->timeout), sea_timeout, scb); 616 splx(s); 617 return; 618 } 619 620 splx(s); 621 622 /* 623 * If we can't use interrupts, poll on completion 624 */ 625 if (sea_poll(sea, xs, xs->timeout)) { 626 sea_timeout(scb); 627 if (sea_poll(sea, xs, 2000)) 628 sea_timeout(scb); 629 } 630 return; 631 632 case ADAPTER_REQ_GROW_RESOURCES: 633 sea_grow_scb(sea); 634 return; 635 636 case ADAPTER_REQ_SET_XFER_MODE: 637 { 638 struct scsipi_xfer_mode *xm = arg; 639 640 /* 641 * We don't support sync or wide or tagged queueing, 642 * so announce that now. 643 */ 644 xm->xm_mode = 0; 645 xm->xm_period = 0; 646 xm->xm_offset = 0; 647 scsipi_async_event(chan, ASYNC_EVENT_XFER_MODE, xm); 648 return; 649 } 650 } 651 } 652 653 /* 654 * Get a free scb. If there are none, see if we can allocate a new one. If so, 655 * put it in the hash table too; otherwise return an error or sleep. 656 */ 657 struct sea_scb * 658 sea_get_scb(struct sea_softc *sea, int flags) 659 { 660 int s; 661 struct sea_scb *scb; 662 663 s = splbio(); 664 if ((scb = TAILQ_FIRST(&sea->free_list)) != NULL) 665 TAILQ_REMOVE(&sea->free_list, scb, chain); 666 splx(s); 667 668 return (scb); 669 } 670 671 /* 672 * Try to send this command to the board. Because this board does not use any 673 * mailboxes, this routine simply adds the command to the queue held by the 674 * sea_softc structure. 675 * A check is done to see if the command contains a REQUEST_SENSE command, and 676 * if so the command is put first in the queue, otherwise the command is added 677 * to the end of the queue. ?? Not correct ?? 678 */ 679 void 680 sea_send_scb(struct sea_softc *sea, struct sea_scb *scb) 681 { 682 683 TAILQ_INSERT_TAIL(&sea->ready_list, scb, chain); 684 /* Try to do some work on the card. */ 685 if (!main_running) 686 sea_main(); 687 } 688 689 /* 690 * Coroutine that runs as long as more work can be done on the seagate host 691 * adapter in a system. Both sea_scsi_cmd and sea_intr will try to start it in 692 * case it is not running. 693 */ 694 695 void 696 sea_main(void) 697 { 698 struct sea_softc *sea; 699 struct sea_scb *scb; 700 int done; 701 int unit; 702 int s; 703 704 main_running = 1; 705 706 /* 707 * This should not be run with interrupts disabled, but use the splx 708 * code instead. 709 */ 710 loop: 711 done = 1; 712 for (unit = 0; unit < sea_cd.cd_ndevs; unit++) { 713 sea = device_lookup_private(&sea_cd, unit); 714 if (!sea) 715 continue; 716 s = splbio(); 717 if (!sea->nexus) { 718 /* 719 * Search through the ready_list for a command 720 * destined for a target that's not busy. 721 */ 722 for (scb = sea->ready_list.tqh_first; scb; 723 scb = scb->chain.tqe_next) { 724 if (!(sea->busy[scb->xs->xs_periph->periph_target] & 725 (1 << scb->xs->xs_periph->periph_lun))) { 726 TAILQ_REMOVE(&sea->ready_list, scb, 727 chain); 728 729 /* Re-enable interrupts. */ 730 splx(s); 731 732 /* 733 * Attempt to establish an I_T_L nexus. 734 * On success, sea->nexus is set. 735 * On failure, we must add the command 736 * back to the issue queue so we can 737 * keep trying. 738 */ 739 740 /* 741 * REQUEST_SENSE commands are issued 742 * without tagged queueing, even on 743 * SCSI-II devices because the 744 * contingent alligence condition 745 * exists for the entire unit. 746 */ 747 748 /* 749 * First check that if any device has 750 * tried a reconnect while we have done 751 * other things with interrupts 752 * disabled. 753 */ 754 755 if ((STATUS & (STAT_SEL | STAT_IO)) == 756 (STAT_SEL | STAT_IO)) { 757 sea_reselect(sea); 758 break; 759 } 760 if (sea_select(sea, scb)) { 761 s = splbio(); 762 TAILQ_INSERT_HEAD(&sea->ready_list, 763 scb, chain); 764 splx(s); 765 } else 766 break; 767 } /* if target/lun is not busy */ 768 } /* for scb */ 769 if (!sea->nexus) { 770 /* check for reselection phase */ 771 if ((STATUS & (STAT_SEL | STAT_IO)) == 772 (STAT_SEL | STAT_IO)) { 773 sea_reselect(sea); 774 } 775 } 776 } /* if (!sea->nexus) */ 777 778 splx(s); 779 if (sea->nexus) { /* we are connected. Do the task */ 780 sea_information_transfer(sea); 781 done = 0; 782 } else 783 break; 784 } /* for instance */ 785 786 if (!done) 787 goto loop; 788 789 main_running = 0; 790 } 791 792 /* 793 * Allocate an scb and add it to the free list. 794 * We are called at splbio. 795 */ 796 void 797 sea_grow_scb(struct sea_softc *sea) 798 { 799 struct sea_scb *scb; 800 801 if (sea->numscbs == SEA_SCB_MAX) { 802 sea->sc_channel.chan_flags &= ~SCSIPI_CHAN_CANGROW; 803 return; 804 } 805 806 scb = malloc(sizeof(struct sea_scb), M_DEVBUF, M_NOWAIT|M_ZERO); 807 if (scb == NULL) 808 return; 809 810 TAILQ_INSERT_TAIL(&sea->free_list, scb, chain); 811 sea->numscbs++; 812 sea->sc_adapter.adapt_openings++; 813 } 814 void 815 sea_free_scb(struct sea_softc *sea, struct sea_scb *scb, int flags) 816 { 817 int s; 818 819 s = splbio(); 820 scb->flags = SCB_FREE; 821 TAILQ_INSERT_HEAD(&sea->free_list, scb, chain); 822 splx(s); 823 } 824 825 void 826 sea_timeout(void *arg) 827 { 828 struct sea_scb *scb = arg; 829 struct scsipi_xfer *xs = scb->xs; 830 struct scsipi_periph *periph = xs->xs_periph; 831 struct sea_softc *sea = 832 device_private(periph->periph_channel->chan_adapter->adapt_dev); 833 int s; 834 835 scsipi_printaddr(periph); 836 printf("timed out"); 837 838 s = splbio(); 839 840 /* 841 * If it has been through before, then 842 * a previous abort has failed, don't 843 * try abort again 844 */ 845 if (scb->flags & SCB_ABORTED) { 846 /* abort timed out */ 847 printf(" AGAIN\n"); 848 scb->xs->xs_retries = 0; 849 scb->flags |= SCB_ABORTED; 850 sea_done(sea, scb); 851 } else { 852 /* abort the operation that has timed out */ 853 printf("\n"); 854 scb->flags |= SCB_ABORTED; 855 sea_abort(sea, scb); 856 /* 2 secs for the abort */ 857 if ((xs->xs_control & XS_CTL_POLL) == 0) 858 callout_reset(&scb->xs->xs_callout, 2 * hz, 859 sea_timeout, scb); 860 } 861 862 splx(s); 863 } 864 865 void 866 sea_reselect(struct sea_softc *sea) 867 { 868 u_char target_mask; 869 int i; 870 u_char lun, phase; 871 u_char msg[3]; 872 int len; 873 u_char *data; 874 struct sea_scb *scb; 875 int abort = 0; 876 877 if (!((target_mask = STATUS) & STAT_SEL)) { 878 printf("%s: wrong state 0x%x\n", device_xname(sea->sc_dev), 879 target_mask); 880 return; 881 } 882 883 /* wait for a device to win the reselection phase */ 884 /* signals this by asserting the I/O signal */ 885 for (i = 10; i && (STATUS & (STAT_SEL | STAT_IO | STAT_BSY)) != 886 (STAT_SEL | STAT_IO | 0); i--); 887 /* !! Check for timeout here */ 888 /* the data bus contains original initiator id ORed with target id */ 889 target_mask = DATA; 890 /* see that we really are the initiator */ 891 if (!(target_mask & sea->our_id_mask)) { 892 printf("%s: polled reselection was not for me: 0x%x\n", 893 device_xname(sea->sc_dev), target_mask); 894 return; 895 } 896 /* find target who won */ 897 target_mask &= ~sea->our_id_mask; 898 /* host responds by asserting the BSY signal */ 899 CONTROL = BASE_CMD | CMD_DRVR_ENABLE | CMD_BSY; 900 /* target should respond by deasserting the SEL signal */ 901 for (i = 50000; i && (STATUS & STAT_SEL); i++); 902 /* remove the busy status */ 903 CONTROL = BASE_CMD | CMD_DRVR_ENABLE; 904 /* we are connected. Now we wait for the MSGIN condition */ 905 for (i = 50000; i && !(STATUS & STAT_REQ); i--); 906 /* !! Add timeout check here */ 907 /* hope we get an IDENTIFY message */ 908 len = 3; 909 data = msg; 910 phase = PH_MSGIN; 911 sea_transfer_pio(sea, &phase, &len, &data); 912 913 if (!MSG_ISIDENTIFY(msg[0])) { 914 printf("%s: expecting IDENTIFY message, got 0x%x\n", 915 device_xname(sea->sc_dev), msg[0]); 916 abort = 1; 917 scb = NULL; 918 } else { 919 lun = msg[0] & 0x07; 920 921 /* 922 * Find the command corresponding to the I_T_L or I_T_L_Q nexus 923 * we just reestablished, and remove it from the disconnected 924 * queue. 925 */ 926 for (scb = sea->nexus_list.tqh_first; scb; 927 scb = scb->chain.tqe_next) 928 if (target_mask == (1 << scb->xs->xs_periph->periph_target) && 929 lun == scb->xs->xs_periph->periph_lun) { 930 TAILQ_REMOVE(&sea->nexus_list, scb, 931 chain); 932 break; 933 } 934 if (!scb) { 935 printf("%s: target %02x lun %d not disconnected\n", 936 device_xname(sea->sc_dev), target_mask, lun); 937 /* 938 * Since we have an established nexus that we can't do 939 * anything with, we must abort it. 940 */ 941 abort = 1; 942 } 943 } 944 945 if (abort) { 946 msg[0] = MSG_ABORT; 947 len = 1; 948 data = msg; 949 phase = PH_MSGOUT; 950 CONTROL = BASE_CMD | CMD_ATTN; 951 sea_transfer_pio(sea, &phase, &len, &data); 952 } else 953 sea->nexus = scb; 954 955 return; 956 } 957 958 /* 959 * Transfer data in given phase using polled I/O. 960 */ 961 int 962 sea_transfer_pio(struct sea_softc *sea, u_char *phase, int *count, u_char **data) 963 { 964 u_char p = *phase, tmp; 965 int c = *count; 966 u_char *d = *data; 967 int timeout; 968 969 do { 970 /* 971 * Wait for assertion of REQ, after which the phase bits will 972 * be valid. 973 */ 974 for (timeout = 0; timeout < 50000; timeout++) 975 if ((tmp = STATUS) & STAT_REQ) 976 break; 977 if (!(tmp & STAT_REQ)) { 978 printf("%s: timeout waiting for STAT_REQ\n", 979 device_xname(sea->sc_dev)); 980 break; 981 } 982 983 /* 984 * Check for phase mismatch. Reached if the target decides 985 * that it has finished the transfer. 986 */ 987 if (sea->type == FDOMAIN840) 988 tmp = ((tmp & 0x08) >> 2) | 989 ((tmp & 0x02) << 2) | 990 (tmp & 0xf5); 991 if ((tmp & PH_MASK) != p) 992 break; 993 994 /* Do actual transfer from SCSI bus to/from memory. */ 995 if (!(p & STAT_IO)) 996 DATA = *d; 997 else 998 *d = DATA; 999 ++d; 1000 1001 /* 1002 * The SCSI standard suggests that in MSGOUT phase, the 1003 * initiator should drop ATN on the last byte of the message 1004 * phase after REQ has been asserted for the handshake but 1005 * before the initiator raises ACK. 1006 * Don't know how to accomplish this on the ST01/02. 1007 */ 1008 1009 #if 0 1010 /* 1011 * XXX 1012 * The st01 code doesn't wait for STAT_REQ to be deasserted. 1013 * Is this ok? 1014 */ 1015 for (timeout = 0; timeout < 200000L; timeout++) 1016 if (!(STATUS & STAT_REQ)) 1017 break; 1018 if (STATUS & STAT_REQ) 1019 printf("%s: timeout on wait for !STAT_REQ", 1020 device_xname(sea->sc_dev)); 1021 #endif 1022 } while (--c); 1023 1024 *count = c; 1025 *data = d; 1026 tmp = STATUS; 1027 if (tmp & STAT_REQ) 1028 *phase = tmp & PH_MASK; 1029 else 1030 *phase = PH_INVALID; 1031 1032 if (c && (*phase != p)) 1033 return -1; 1034 return 0; 1035 } 1036 1037 /* 1038 * Establish I_T_L or I_T_L_Q nexus for new or existing command including 1039 * ARBITRATION, SELECTION, and initial message out for IDENTIFY and queue 1040 * messages. Return -1 if selection could not execute for some reason, 0 if 1041 * selection succeded or failed because the target did not respond. 1042 */ 1043 int 1044 sea_select(struct sea_softc *sea, struct sea_scb *scb) 1045 { 1046 u_char msg[3], phase; 1047 u_char *data; 1048 int len; 1049 int timeout; 1050 1051 CONTROL = BASE_CMD; 1052 DATA = sea->our_id_mask; 1053 CONTROL = (BASE_CMD & ~CMD_INTR) | CMD_START_ARB; 1054 1055 /* wait for arbitration to complete */ 1056 for (timeout = 0; timeout < 3000000L; timeout++) 1057 if (STATUS & STAT_ARB_CMPL) 1058 break; 1059 if (!(STATUS & STAT_ARB_CMPL)) { 1060 if (STATUS & STAT_SEL) { 1061 printf("%s: arbitration lost\n", device_xname(sea->sc_dev)); 1062 scb->flags |= SCB_ERROR; 1063 } else { 1064 printf("%s: arbitration timeout\n", 1065 device_xname(sea->sc_dev)); 1066 scb->flags |= SCB_TIMEOUT; 1067 } 1068 CONTROL = BASE_CMD; 1069 return -1; 1070 } 1071 1072 delay(2); 1073 DATA = (u_char)((1 << scb->xs->xs_periph->periph_target) | 1074 sea->our_id_mask); 1075 CONTROL = 1076 #ifdef SEA_NOMSGS 1077 (BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE | CMD_SEL; 1078 #else 1079 (BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE | CMD_SEL | CMD_ATTN; 1080 #endif 1081 delay(1); 1082 1083 /* wait for a bsy from target */ 1084 for (timeout = 0; timeout < 2000000L; timeout++) 1085 if (STATUS & STAT_BSY) 1086 break; 1087 if (!(STATUS & STAT_BSY)) { 1088 /* should return some error to the higher level driver */ 1089 CONTROL = BASE_CMD; 1090 scb->flags |= SCB_TIMEOUT; 1091 return 0; 1092 } 1093 1094 /* Try to make the target to take a message from us */ 1095 #ifdef SEA_NOMSGS 1096 CONTROL = (BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE; 1097 #else 1098 CONTROL = (BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE | CMD_ATTN; 1099 #endif 1100 delay(1); 1101 1102 /* should start a msg_out phase */ 1103 for (timeout = 0; timeout < 2000000L; timeout++) 1104 if (STATUS & STAT_REQ) 1105 break; 1106 /* Remove ATN. */ 1107 CONTROL = BASE_CMD | CMD_DRVR_ENABLE; 1108 if (!(STATUS & STAT_REQ)) { 1109 /* 1110 * This should not be taken as an error, but more like an 1111 * unsupported feature! Should set a flag indicating that the 1112 * target don't support messages, and continue without failure. 1113 * (THIS IS NOT AN ERROR!) 1114 */ 1115 } else { 1116 msg[0] = MSG_IDENTIFY(scb->xs->xs_periph->periph_lun, 1); 1117 len = 1; 1118 data = msg; 1119 phase = PH_MSGOUT; 1120 /* Should do test on result of sea_transfer_pio(). */ 1121 sea_transfer_pio(sea, &phase, &len, &data); 1122 } 1123 if (!(STATUS & STAT_BSY)) 1124 printf("%s: after successful arbitrate: no STAT_BSY!\n", 1125 device_xname(sea->sc_dev)); 1126 1127 sea->nexus = scb; 1128 sea->busy[scb->xs->xs_periph->periph_target] |= 1129 1 << scb->xs->xs_periph->periph_lun; 1130 /* This assignment should depend on possibility to send a message to target. */ 1131 CONTROL = BASE_CMD | CMD_DRVR_ENABLE; 1132 /* XXX Reset pointer in command? */ 1133 return 0; 1134 } 1135 1136 /* 1137 * Send an abort to the target. Return 1 success, 0 on failure. 1138 */ 1139 int 1140 sea_abort(struct sea_softc *sea, struct sea_scb *scb) 1141 { 1142 struct sea_scb *tmp; 1143 u_char msg, phase, *msgptr; 1144 int len; 1145 1146 /* 1147 * If the command hasn't been issued yet, we simply remove it from the 1148 * issue queue 1149 * XXX Could avoid this loop. 1150 */ 1151 for (tmp = sea->ready_list.tqh_first; tmp; tmp = tmp->chain.tqe_next) 1152 if (scb == tmp) { 1153 TAILQ_REMOVE(&sea->ready_list, scb, chain); 1154 /* XXX Set some type of error result for operation. */ 1155 return 1; 1156 } 1157 1158 /* 1159 * If any commands are connected, we're going to fail the abort and let 1160 * the high level SCSI driver retry at a later time or issue a reset. 1161 */ 1162 if (sea->nexus) 1163 return 0; 1164 1165 /* 1166 * If the command is currently disconnected from the bus, and there are 1167 * no connected commands, we reconnect the I_T_L or I_T_L_Q nexus 1168 * associated with it, go into message out, and send an abort message. 1169 */ 1170 for (tmp = sea->nexus_list.tqh_first; tmp; 1171 tmp = tmp->chain.tqe_next) 1172 if (scb == tmp) { 1173 if (sea_select(sea, scb)) 1174 return 0; 1175 1176 msg = MSG_ABORT; 1177 msgptr = &msg; 1178 len = 1; 1179 phase = PH_MSGOUT; 1180 CONTROL = BASE_CMD | CMD_ATTN; 1181 sea_transfer_pio(sea, &phase, &len, &msgptr); 1182 1183 for (tmp = sea->nexus_list.tqh_first; tmp; 1184 tmp = tmp->chain.tqe_next) 1185 if (scb == tmp) { 1186 TAILQ_REMOVE(&sea->nexus_list, 1187 scb, chain); 1188 /* XXX Set some type of error result 1189 for the operation. */ 1190 return 1; 1191 } 1192 } 1193 1194 /* Command not found in any queue; race condition? */ 1195 return 1; 1196 } 1197 1198 void 1199 sea_done(struct sea_softc *sea, struct sea_scb *scb) 1200 { 1201 struct scsipi_xfer *xs = scb->xs; 1202 1203 callout_stop(&scb->xs->xs_callout); 1204 1205 xs->resid = scb->datalen; 1206 1207 /* XXXX need to get status */ 1208 if (scb->flags == SCB_ACTIVE) { 1209 xs->resid = 0; 1210 } else { 1211 if (scb->flags & (SCB_TIMEOUT | SCB_ABORTED)) 1212 xs->error = XS_TIMEOUT; 1213 if (scb->flags & SCB_ERROR) 1214 xs->error = XS_DRIVER_STUFFUP; 1215 } 1216 sea_free_scb(sea, scb, xs->xs_control); 1217 scsipi_done(xs); 1218 } 1219 1220 /* 1221 * Wait for completion of command in polled mode. 1222 */ 1223 int 1224 sea_poll(struct sea_softc *sea, struct scsipi_xfer *xs, int count) 1225 { 1226 int s; 1227 1228 while (count) { 1229 /* try to do something */ 1230 s = splbio(); 1231 if (!main_running) 1232 sea_main(); 1233 splx(s); 1234 if (xs->xs_status & XS_STS_DONE) 1235 return 0; 1236 delay(1000); 1237 count--; 1238 } 1239 return 1; 1240 } 1241 1242 /* 1243 * Do the transfer. We know we are connected. Update the flags, and call 1244 * sea_done() when task accomplished. Dialog controlled by the target. 1245 */ 1246 void 1247 sea_information_transfer(struct sea_softc *sea) 1248 { 1249 int timeout; 1250 u_char msgout = MSG_NOOP; 1251 int len; 1252 int s; 1253 u_char *data; 1254 u_char phase, tmp, old_phase = PH_INVALID; 1255 struct sea_scb *scb = sea->nexus; 1256 int loop; 1257 1258 for (timeout = 0; timeout < 10000000L; timeout++) { 1259 tmp = STATUS; 1260 if (tmp & STAT_PARITY) 1261 printf("%s: parity error detected\n", 1262 device_xname(sea->sc_dev)); 1263 if (!(tmp & STAT_BSY)) { 1264 for (loop = 0; loop < 20; loop++) 1265 if ((tmp = STATUS) & STAT_BSY) 1266 break; 1267 if (!(tmp & STAT_BSY)) { 1268 printf("%s: !STAT_BSY unit in data transfer!\n", 1269 device_xname(sea->sc_dev)); 1270 s = splbio(); 1271 sea->nexus = NULL; 1272 scb->flags = SCB_ERROR; 1273 splx(s); 1274 sea_done(sea, scb); 1275 return; 1276 } 1277 } 1278 1279 /* we only have a valid SCSI phase when REQ is asserted */ 1280 if (!(tmp & STAT_REQ)) 1281 continue; 1282 1283 if (sea->type == FDOMAIN840) 1284 tmp = ((tmp & 0x08) >> 2) | 1285 ((tmp & 0x02) << 2) | 1286 (tmp & 0xf5); 1287 phase = tmp & PH_MASK; 1288 if (phase != old_phase) 1289 old_phase = phase; 1290 1291 switch (phase) { 1292 case PH_DATAOUT: 1293 #ifdef SEA_NODATAOUT 1294 printf("%s: SEA_NODATAOUT set, attempted DATAOUT aborted\n", 1295 device_xname(sea->sc_dev)); 1296 msgout = MSG_ABORT; 1297 CONTROL = BASE_CMD | CMD_ATTN; 1298 break; 1299 #endif 1300 case PH_DATAIN: 1301 if (!scb->data) 1302 printf("no data address!\n"); 1303 #ifdef SEA_BLINDTRANSFER 1304 if (scb->datalen && !(scb->datalen % BLOCK_SIZE)) { 1305 while (scb->datalen) { 1306 for (loop = 0; loop < 50000; loop++) 1307 if ((tmp = STATUS) & STAT_REQ) 1308 break; 1309 if (!(tmp & STAT_REQ)) { 1310 printf("%s: timeout waiting for STAT_REQ\n", 1311 device_xname(sea->sc_dev)); 1312 /* XXX Do something? */ 1313 } 1314 if (sea->type == FDOMAIN840) 1315 tmp = ((tmp & 0x08) >> 2) | 1316 ((tmp & 0x02) << 2) | 1317 (tmp & 0xf5); 1318 if ((tmp & PH_MASK) != phase) 1319 break; 1320 if (!(phase & STAT_IO)) { 1321 #ifdef SEA_ASSEMBLER 1322 void *junk; 1323 __asm("cld\n\t\ 1324 rep\n\t\ 1325 movsl" : 1326 "=S" (scb->data), 1327 "=c" (len), 1328 "=D" (junk) : 1329 "0" (scb->data), 1330 "1" (BLOCK_SIZE >> 2), 1331 "2" (sea->maddr_dr)); 1332 #else 1333 for (len = BLOCK_SIZE; 1334 len; len--) 1335 DATA = *(scb->data++); 1336 #endif 1337 } else { 1338 #ifdef SEA_ASSEMBLER 1339 void *junk; 1340 __asm("cld\n\t\ 1341 rep\n\t\ 1342 movsl" : 1343 "=D" (scb->data), 1344 "=c" (len), 1345 "=S" (junk) : 1346 "0" (scb->data), 1347 "1" (BLOCK_SIZE >> 2), 1348 "2" (sea->maddr_dr)); 1349 #else 1350 for (len = BLOCK_SIZE; 1351 len; len--) 1352 *(scb->data++) = DATA; 1353 #endif 1354 } 1355 scb->datalen -= BLOCK_SIZE; 1356 } 1357 } 1358 #endif 1359 if (scb->datalen) 1360 sea_transfer_pio(sea, &phase, &scb->datalen, 1361 &scb->data); 1362 break; 1363 case PH_MSGIN: 1364 /* Multibyte messages should not be present here. */ 1365 len = 1; 1366 data = &tmp; 1367 sea_transfer_pio(sea, &phase, &len, &data); 1368 /* scb->MessageIn = tmp; */ 1369 1370 switch (tmp) { 1371 case MSG_ABORT: 1372 scb->flags = SCB_ABORTED; 1373 printf("sea: command aborted by target\n"); 1374 CONTROL = BASE_CMD; 1375 sea_done(sea, scb); 1376 return; 1377 case MSG_CMDCOMPLETE: 1378 s = splbio(); 1379 sea->nexus = NULL; 1380 splx(s); 1381 sea->busy[scb->xs->xs_periph->periph_target] &= 1382 ~(1 << scb->xs->xs_periph->periph_lun); 1383 CONTROL = BASE_CMD; 1384 sea_done(sea, scb); 1385 return; 1386 case MSG_MESSAGE_REJECT: 1387 printf("%s: message_reject received\n", 1388 device_xname(sea->sc_dev)); 1389 break; 1390 case MSG_DISCONNECT: 1391 s = splbio(); 1392 TAILQ_INSERT_TAIL(&sea->nexus_list, 1393 scb, chain); 1394 sea->nexus = NULL; 1395 CONTROL = BASE_CMD; 1396 splx(s); 1397 return; 1398 case MSG_SAVEDATAPOINTER: 1399 case MSG_RESTOREPOINTERS: 1400 /* save/restore of pointers are ignored */ 1401 break; 1402 default: 1403 /* 1404 * This should be handled in the pio data 1405 * transfer phase, as the ATN should be raised 1406 * before ACK goes false when rejecting a 1407 * message. 1408 */ 1409 printf("%s: unknown message in: %x\n", 1410 device_xname(sea->sc_dev), tmp); 1411 break; 1412 } /* switch (tmp) */ 1413 break; 1414 case PH_MSGOUT: 1415 len = 1; 1416 data = &msgout; 1417 /* sea->last_message = msgout; */ 1418 sea_transfer_pio(sea, &phase, &len, &data); 1419 if (msgout == MSG_ABORT) { 1420 printf("%s: sent message abort to target\n", 1421 device_xname(sea->sc_dev)); 1422 s = splbio(); 1423 sea->busy[scb->xs->xs_periph->periph_target] &= 1424 ~(1 << scb->xs->xs_periph->periph_lun); 1425 sea->nexus = NULL; 1426 scb->flags = SCB_ABORTED; 1427 splx(s); 1428 /* enable interrupt from scsi */ 1429 sea_done(sea, scb); 1430 return; 1431 } 1432 msgout = MSG_NOOP; 1433 break; 1434 case PH_CMD: 1435 len = scb->xs->cmdlen; 1436 data = (char *) scb->xs->cmd; 1437 sea_transfer_pio(sea, &phase, &len, &data); 1438 break; 1439 case PH_STAT: 1440 len = 1; 1441 data = &tmp; 1442 sea_transfer_pio(sea, &phase, &len, &data); 1443 scb->xs->status = tmp; 1444 break; 1445 default: 1446 printf("sea: unknown phase\n"); 1447 } /* switch (phase) */ 1448 } /* for (...) */ 1449 1450 /* If we get here we have got a timeout! */ 1451 printf("%s: timeout in data transfer\n", device_xname(sea->sc_dev)); 1452 scb->flags = SCB_TIMEOUT; 1453 /* XXX Should I clear scsi-bus state? */ 1454 sea_done(sea, scb); 1455 } 1456
Indexes created Tue Sep 30 10:09:55 GMT 2025