seagate.c revision 1.60
1 /* $NetBSD: seagate.c,v 1.60 2006/10/12 01:31:17 christos 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 1.60 2006/10/12 01:31:17 christos 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 const 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(void *); 279 void sea_scsipi_request(struct scsipi_channel *, scsipi_adapter_req_t, void *); 280 void sea_timeout(void *); 281 void sea_done(struct sea_softc *, struct sea_scb *); 282 struct sea_scb *sea_get_scb(struct sea_softc *, int); 283 void sea_free_scb(struct sea_softc *, struct sea_scb *, int); 284 static void sea_main(void); 285 static void sea_information_transfer(struct sea_softc *); 286 int sea_poll(struct sea_softc *, struct scsipi_xfer *, int); 287 void sea_init(struct sea_softc *); 288 void sea_send_scb(struct sea_softc *sea, struct sea_scb *scb); 289 void sea_reselect(struct sea_softc *sea); 290 int sea_select(struct sea_softc *sea, struct sea_scb *scb); 291 int sea_transfer_pio(struct sea_softc *sea, u_char *phase, 292 int *count, u_char **data); 293 int sea_abort(struct sea_softc *, struct sea_scb *scb); 294 295 void sea_grow_scb(struct sea_softc *); 296 297 int seaprobe(struct device *, struct cfdata *, void *); 298 void seaattach(struct device *, struct device *, void *); 299 300 CFATTACH_DECL(sea, sizeof(struct sea_softc), 301 seaprobe, seaattach, NULL, NULL); 302 303 extern struct cfdriver sea_cd; 304 305 #ifdef SEA_DEBUGQUEUE 306 void 307 sea_queue_length(sea) 308 struct sea_softc *sea; 309 { 310 struct sea_scb *scb; 311 int connected, issued, disconnected; 312 313 connected = sea->nexus ? 1 : 0; 314 for (scb = sea->ready_list.tqh_first, issued = 0; scb; 315 scb = scb->chain.tqe_next, issued++); 316 for (scb = sea->nexus_list.tqh_first, disconnected = 0; scb; 317 scb = scb->chain.tqe_next, disconnected++); 318 printf("%s: length: %d/%d/%d\n", sea->sc_dev.dv_xname, connected, 319 issued, disconnected); 320 } 321 #endif 322 323 /* 324 * Check if the device can be found at the port given and if so, detect the 325 * type the type of board. Set it up ready for further work. Takes the isa_dev 326 * structure from autoconf as an argument. 327 * Returns 1 if card recognized, 0 if errors. 328 */ 329 int 330 seaprobe(struct device *parent __unused, struct cfdata *match __unused, 331 void *aux) 332 { 333 struct isa_attach_args *ia = aux; 334 int i, type = 0; 335 caddr_t maddr; 336 337 if (ia->ia_niomem < 1) 338 return (0); 339 if (ia->ia_nirq < 1) 340 return (0); 341 342 if (ISA_DIRECT_CONFIG(ia)) 343 return (0); 344 345 if (ia->ia_iomem[0].ir_addr == ISA_UNKNOWN_IOMEM) 346 return (0); 347 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 348 return (0); 349 350 /* XXX XXX XXX */ 351 maddr = ISA_HOLE_VADDR(ia->ia_iomem[0].ir_addr); 352 353 /* check board type */ /* No way to define this through config */ 354 for (i = 0; i < nsignatures; i++) 355 if (!memcmp(maddr + signatures[i].offset, 356 signatures[i].signature, signatures[i].length)) { 357 type = signatures[i].type; 358 break; 359 } 360 361 /* Find controller and data memory addresses */ 362 switch (type) { 363 case SEAGATE: 364 case FDOMAIN840: 365 case FDOMAIN: 366 break; 367 default: 368 #ifdef SEA_DEBUG 369 printf("seaprobe: board type unknown at address %p\n", maddr); 370 #endif 371 return 0; 372 } 373 374 ia->ia_niomem = 1; 375 ia->ia_iomem[0].ir_size = 0x2000; 376 377 ia->ia_nirq = 1; 378 379 ia->ia_nio = 0; 380 ia->ia_ndrq = 0; 381 382 return 1; 383 } 384 385 /* 386 * Attach all sub-devices we can find 387 */ 388 void 389 seaattach(struct device *parent __unused, struct device *self, void *aux) 390 { 391 struct isa_attach_args *ia = aux; 392 struct sea_softc *sea = (void *)self; 393 struct scsipi_adapter *adapt = &sea->sc_adapter; 394 struct scsipi_channel *chan = &sea->sc_channel; 395 int i; 396 397 /* XXX XXX XXX */ 398 sea->maddr = ISA_HOLE_VADDR(ia->ia_iomem[0].ir_addr); 399 400 /* check board type */ /* No way to define this through config */ 401 for (i = 0; i < nsignatures; i++) 402 if (!memcmp(sea->maddr + signatures[i].offset, 403 signatures[i].signature, signatures[i].length)) { 404 sea->type = signatures[i].type; 405 break; 406 } 407 408 /* Find controller and data memory addresses */ 409 switch (sea->type) { 410 case SEAGATE: 411 case FDOMAIN840: 412 sea->maddr_cr_sr = 413 (void *) (((u_char *)sea->maddr) + 0x1a00); 414 sea->maddr_dr = 415 (void *) (((u_char *)sea->maddr) + 0x1c00); 416 break; 417 case FDOMAIN: 418 sea->maddr_cr_sr = 419 (void *) (((u_char *)sea->maddr) + 0x1c00); 420 sea->maddr_dr = 421 (void *) (((u_char *)sea->maddr) + 0x1e00); 422 break; 423 default: 424 #ifdef DEBUG 425 printf("%s: board type unknown at address %p\n", 426 sea->sc_dev.dv_xname, sea->maddr); 427 #endif 428 return; 429 } 430 431 /* Test controller RAM (works the same way on future domain cards?) */ 432 *((u_char *)sea->maddr + SEA_RAMOFFSET) = 0xa5; 433 *((u_char *)sea->maddr + SEA_RAMOFFSET + 1) = 0x5a; 434 435 if ((*((u_char *)sea->maddr + SEA_RAMOFFSET) != 0xa5) || 436 (*((u_char *)sea->maddr + SEA_RAMOFFSET + 1) != 0x5a)) { 437 printf("%s: board RAM failure\n", sea->sc_dev.dv_xname); 438 return; 439 } 440 441 sea_init(sea); 442 443 /* 444 * Fill in the scsipi_adapter. 445 */ 446 memset(adapt, 0, sizeof(*adapt)); 447 adapt->adapt_dev = &sea->sc_dev; 448 adapt->adapt_nchannels = 1; 449 adapt->adapt_openings = sea->numscbs; 450 adapt->adapt_max_periph = 1; 451 adapt->adapt_request = sea_scsipi_request; 452 adapt->adapt_minphys = minphys; 453 454 /* 455 * Fill in the scsipi_channel. 456 */ 457 memset(chan, 0, sizeof(*chan)); 458 chan->chan_adapter = adapt; 459 chan->chan_bustype = &scsi_bustype; 460 chan->chan_channel = 0; 461 chan->chan_ntargets = 8; 462 chan->chan_nluns = 8; 463 chan->chan_id = sea->our_id; 464 chan->chan_flags = SCSIPI_CHAN_CANGROW; 465 466 printf("\n"); 467 468 sea->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 469 IST_EDGE, IPL_BIO, seaintr, sea); 470 471 /* 472 * ask the adapter what subunits are present 473 */ 474 config_found(self, &sea->sc_channel, scsiprint); 475 } 476 477 /* 478 * Catch an interrupt from the adaptor 479 */ 480 int 481 seaintr(arg) 482 void *arg; 483 { 484 struct sea_softc *sea = arg; 485 486 #ifdef DEBUG /* extra overhead, and only needed for intr debugging */ 487 if ((STATUS & STAT_PARITY) == 0 && 488 (STATUS & (STAT_SEL | STAT_IO)) != (STAT_SEL | STAT_IO)) 489 return 0; 490 #endif 491 492 loop: 493 /* dispatch to appropriate routine if found and done=0 */ 494 /* should check to see that this card really caused the interrupt */ 495 496 if (STATUS & STAT_PARITY) { 497 /* Parity error interrupt */ 498 printf("%s: parity error\n", sea->sc_dev.dv_xname); 499 return 1; 500 } 501 502 if ((STATUS & (STAT_SEL | STAT_IO)) == (STAT_SEL | STAT_IO)) { 503 /* Reselect interrupt */ 504 sea_reselect(sea); 505 if (!main_running) 506 sea_main(); 507 goto loop; 508 } 509 510 return 1; 511 } 512 513 /* 514 * Setup data structures, and reset the board and the SCSI bus. 515 */ 516 void 517 sea_init(sea) 518 struct sea_softc *sea; 519 { 520 int i; 521 522 /* Reset the scsi bus (I don't know if this is needed */ 523 CONTROL = BASE_CMD | CMD_DRVR_ENABLE | CMD_RST; 524 delay(25); /* hold reset for at least 25 microseconds */ 525 CONTROL = BASE_CMD; 526 delay(10); /* wait a Bus Clear Delay (800 ns + bus free delay (800 ns) */ 527 528 /* Set our id (don't know anything about this) */ 529 switch (sea->type) { 530 case SEAGATE: 531 sea->our_id = 7; 532 break; 533 case FDOMAIN: 534 case FDOMAIN840: 535 sea->our_id = 6; 536 break; 537 } 538 sea->our_id_mask = 1 << sea->our_id; 539 540 /* init fields used by our routines */ 541 sea->nexus = 0; 542 TAILQ_INIT(&sea->ready_list); 543 TAILQ_INIT(&sea->nexus_list); 544 TAILQ_INIT(&sea->free_list); 545 for (i = 0; i < 8; i++) 546 sea->busy[i] = 0x00; 547 548 /* link up the free list of scbs */ 549 sea->numscbs = SCB_TABLE_SIZE; 550 for (i = 0; i < SCB_TABLE_SIZE; i++) { 551 TAILQ_INSERT_TAIL(&sea->free_list, &sea->scb[i], chain); 552 } 553 } 554 555 /* 556 * start a scsi operation given the command and the data address. Also needs 557 * the unit, target and lu. 558 */ 559 void 560 sea_scsipi_request(chan, req, arg) 561 struct scsipi_channel *chan; 562 scsipi_adapter_req_t req; 563 void *arg; 564 { 565 struct scsipi_xfer *xs; 566 struct scsipi_periph *periph; 567 struct sea_softc *sea = (void *)chan->chan_adapter->adapt_dev; 568 struct sea_scb *scb; 569 int flags; 570 int s; 571 572 switch (req) { 573 case ADAPTER_REQ_RUN_XFER: 574 xs = arg; 575 periph = xs->xs_periph; 576 flags = xs->xs_control; 577 578 SC_DEBUG(periph, SCSIPI_DB2, ("sea_scsipi_requeset\n")); 579 580 /* XXX Reset not implemented. */ 581 if (flags & XS_CTL_RESET) { 582 printf("%s: resetting\n", sea->sc_dev.dv_xname); 583 xs->error = XS_DRIVER_STUFFUP; 584 scsipi_done(xs); 585 return; 586 } 587 588 /* Get an SCB to use. */ 589 scb = sea_get_scb(sea, flags); 590 #ifdef DIAGNOSTIC 591 /* 592 * This should never happen as we track the resources 593 * in the mid-layer. 594 */ 595 if (scb == NULL) { 596 scsipi_printaddr(periph); 597 printf("unable to allocate scb\n"); 598 panic("sea_scsipi_request"); 599 } 600 #endif 601 602 scb->flags = SCB_ACTIVE; 603 scb->xs = xs; 604 605 /* 606 * Put all the arguments for the xfer in the scb 607 */ 608 scb->datalen = xs->datalen; 609 scb->data = xs->data; 610 611 #ifdef SEA_DEBUGQUEUE 612 sea_queue_length(sea); 613 #endif 614 615 s = splbio(); 616 617 sea_send_scb(sea, scb); 618 619 if ((flags & XS_CTL_POLL) == 0) { 620 callout_reset(&scb->xs->xs_callout, 621 mstohz(xs->timeout), sea_timeout, scb); 622 splx(s); 623 return; 624 } 625 626 splx(s); 627 628 /* 629 * If we can't use interrupts, poll on completion 630 */ 631 if (sea_poll(sea, xs, xs->timeout)) { 632 sea_timeout(scb); 633 if (sea_poll(sea, xs, 2000)) 634 sea_timeout(scb); 635 } 636 return; 637 638 case ADAPTER_REQ_GROW_RESOURCES: 639 sea_grow_scb(sea); 640 return; 641 642 case ADAPTER_REQ_SET_XFER_MODE: 643 { 644 struct scsipi_xfer_mode *xm = arg; 645 646 /* 647 * We don't support sync or wide or tagged queueing, 648 * so announce that now. 649 */ 650 xm->xm_mode = 0; 651 xm->xm_period = 0; 652 xm->xm_offset = 0; 653 scsipi_async_event(chan, ASYNC_EVENT_XFER_MODE, xm); 654 return; 655 } 656 } 657 } 658 659 /* 660 * Get a free scb. If there are none, see if we can allocate a new one. If so, 661 * put it in the hash table too; otherwise return an error or sleep. 662 */ 663 struct sea_scb * 664 sea_get_scb(struct sea_softc *sea, int flags __unused) 665 { 666 int s; 667 struct sea_scb *scb; 668 669 s = splbio(); 670 if ((scb = TAILQ_FIRST(&sea->free_list)) != NULL) 671 TAILQ_REMOVE(&sea->free_list, scb, chain); 672 splx(s); 673 674 return (scb); 675 } 676 677 /* 678 * Try to send this command to the board. Because this board does not use any 679 * mailboxes, this routine simply adds the command to the queue held by the 680 * sea_softc structure. 681 * A check is done to see if the command contains a REQUEST_SENSE command, and 682 * if so the command is put first in the queue, otherwise the command is added 683 * to the end of the queue. ?? Not correct ?? 684 */ 685 void 686 sea_send_scb(sea, scb) 687 struct sea_softc *sea; 688 struct sea_scb *scb; 689 { 690 691 TAILQ_INSERT_TAIL(&sea->ready_list, scb, chain); 692 /* Try to do some work on the card. */ 693 if (!main_running) 694 sea_main(); 695 } 696 697 /* 698 * Coroutine that runs as long as more work can be done on the seagate host 699 * adapter in a system. Both sea_scsi_cmd and sea_intr will try to start it in 700 * case it is not running. 701 */ 702 703 void 704 sea_main() 705 { 706 struct sea_softc *sea; 707 struct sea_scb *scb; 708 int done; 709 int unit; 710 int s; 711 712 main_running = 1; 713 714 /* 715 * This should not be run with interrupts disabled, but use the splx 716 * code instead. 717 */ 718 loop: 719 done = 1; 720 for (unit = 0; unit < sea_cd.cd_ndevs; unit++) { 721 sea = device_lookup(&sea_cd, unit); 722 if (!sea) 723 continue; 724 s = splbio(); 725 if (!sea->nexus) { 726 /* 727 * Search through the ready_list for a command 728 * destined for a target that's not busy. 729 */ 730 for (scb = sea->ready_list.tqh_first; scb; 731 scb = scb->chain.tqe_next) { 732 if (!(sea->busy[scb->xs->xs_periph->periph_target] & 733 (1 << scb->xs->xs_periph->periph_lun))) { 734 TAILQ_REMOVE(&sea->ready_list, scb, 735 chain); 736 737 /* Re-enable interrupts. */ 738 splx(s); 739 740 /* 741 * Attempt to establish an I_T_L nexus. 742 * On success, sea->nexus is set. 743 * On failure, we must add the command 744 * back to the issue queue so we can 745 * keep trying. 746 */ 747 748 /* 749 * REQUEST_SENSE commands are issued 750 * without tagged queueing, even on 751 * SCSI-II devices because the 752 * contingent alligence condition 753 * exists for the entire unit. 754 */ 755 756 /* 757 * First check that if any device has 758 * tried a reconnect while we have done 759 * other things with interrupts 760 * disabled. 761 */ 762 763 if ((STATUS & (STAT_SEL | STAT_IO)) == 764 (STAT_SEL | STAT_IO)) { 765 sea_reselect(sea); 766 break; 767 } 768 if (sea_select(sea, scb)) { 769 s = splbio(); 770 TAILQ_INSERT_HEAD(&sea->ready_list, 771 scb, chain); 772 splx(s); 773 } else 774 break; 775 } /* if target/lun is not busy */ 776 } /* for scb */ 777 if (!sea->nexus) { 778 /* check for reselection phase */ 779 if ((STATUS & (STAT_SEL | STAT_IO)) == 780 (STAT_SEL | STAT_IO)) { 781 sea_reselect(sea); 782 } 783 } 784 } /* if (!sea->nexus) */ 785 786 splx(s); 787 if (sea->nexus) { /* we are connected. Do the task */ 788 sea_information_transfer(sea); 789 done = 0; 790 } else 791 break; 792 } /* for instance */ 793 794 if (!done) 795 goto loop; 796 797 main_running = 0; 798 } 799 800 /* 801 * Allocate an scb and add it to the free list. 802 * We are called at splbio. 803 */ 804 void 805 sea_grow_scb(sea) 806 struct sea_softc *sea; 807 { 808 struct sea_scb *scb; 809 810 if (sea->numscbs == SEA_SCB_MAX) { 811 sea->sc_channel.chan_flags &= ~SCSIPI_CHAN_CANGROW; 812 return; 813 } 814 815 scb = malloc(sizeof(struct sea_scb), M_DEVBUF, M_NOWAIT|M_ZERO); 816 if (scb == NULL) 817 return; 818 819 TAILQ_INSERT_TAIL(&sea->free_list, scb, chain); 820 sea->numscbs++; 821 sea->sc_adapter.adapt_openings++; 822 } 823 void 824 sea_free_scb(struct sea_softc *sea, struct sea_scb *scb, int flags __unused) 825 { 826 int s; 827 828 s = splbio(); 829 scb->flags = SCB_FREE; 830 TAILQ_INSERT_HEAD(&sea->free_list, scb, chain); 831 splx(s); 832 } 833 834 void 835 sea_timeout(arg) 836 void *arg; 837 { 838 struct sea_scb *scb = arg; 839 struct scsipi_xfer *xs = scb->xs; 840 struct scsipi_periph *periph = xs->xs_periph; 841 struct sea_softc *sea = 842 (void *)periph->periph_channel->chan_adapter->adapt_dev; 843 int s; 844 845 scsipi_printaddr(periph); 846 printf("timed out"); 847 848 s = splbio(); 849 850 /* 851 * If it has been through before, then 852 * a previous abort has failed, don't 853 * try abort again 854 */ 855 if (scb->flags & SCB_ABORTED) { 856 /* abort timed out */ 857 printf(" AGAIN\n"); 858 scb->xs->xs_retries = 0; 859 scb->flags |= SCB_ABORTED; 860 sea_done(sea, scb); 861 } else { 862 /* abort the operation that has timed out */ 863 printf("\n"); 864 scb->flags |= SCB_ABORTED; 865 sea_abort(sea, scb); 866 /* 2 secs for the abort */ 867 if ((xs->xs_control & XS_CTL_POLL) == 0) 868 callout_reset(&scb->xs->xs_callout, 2 * hz, 869 sea_timeout, scb); 870 } 871 872 splx(s); 873 } 874 875 void 876 sea_reselect(sea) 877 struct sea_softc *sea; 878 { 879 u_char target_mask; 880 int i; 881 u_char lun, phase; 882 u_char msg[3]; 883 int len; 884 u_char *data; 885 struct sea_scb *scb; 886 int abort = 0; 887 888 if (!((target_mask = STATUS) & STAT_SEL)) { 889 printf("%s: wrong state 0x%x\n", sea->sc_dev.dv_xname, 890 target_mask); 891 return; 892 } 893 894 /* wait for a device to win the reselection phase */ 895 /* signals this by asserting the I/O signal */ 896 for (i = 10; i && (STATUS & (STAT_SEL | STAT_IO | STAT_BSY)) != 897 (STAT_SEL | STAT_IO | 0); i--); 898 /* !! Check for timeout here */ 899 /* the data bus contains original initiator id ORed with target id */ 900 target_mask = DATA; 901 /* see that we really are the initiator */ 902 if (!(target_mask & sea->our_id_mask)) { 903 printf("%s: polled reselection was not for me: 0x%x\n", 904 sea->sc_dev.dv_xname, target_mask); 905 return; 906 } 907 /* find target who won */ 908 target_mask &= ~sea->our_id_mask; 909 /* host responds by asserting the BSY signal */ 910 CONTROL = BASE_CMD | CMD_DRVR_ENABLE | CMD_BSY; 911 /* target should respond by deasserting the SEL signal */ 912 for (i = 50000; i && (STATUS & STAT_SEL); i++); 913 /* remove the busy status */ 914 CONTROL = BASE_CMD | CMD_DRVR_ENABLE; 915 /* we are connected. Now we wait for the MSGIN condition */ 916 for (i = 50000; i && !(STATUS & STAT_REQ); i--); 917 /* !! Add timeout check here */ 918 /* hope we get an IDENTIFY message */ 919 len = 3; 920 data = msg; 921 phase = PH_MSGIN; 922 sea_transfer_pio(sea, &phase, &len, &data); 923 924 if (!MSG_ISIDENTIFY(msg[0])) { 925 printf("%s: expecting IDENTIFY message, got 0x%x\n", 926 sea->sc_dev.dv_xname, msg[0]); 927 abort = 1; 928 scb = NULL; 929 } else { 930 lun = msg[0] & 0x07; 931 932 /* 933 * Find the command corresponding to the I_T_L or I_T_L_Q nexus 934 * we just reestablished, and remove it from the disconnected 935 * queue. 936 */ 937 for (scb = sea->nexus_list.tqh_first; scb; 938 scb = scb->chain.tqe_next) 939 if (target_mask == (1 << scb->xs->xs_periph->periph_target) && 940 lun == scb->xs->xs_periph->periph_lun) { 941 TAILQ_REMOVE(&sea->nexus_list, scb, 942 chain); 943 break; 944 } 945 if (!scb) { 946 printf("%s: target %02x lun %d not disconnected\n", 947 sea->sc_dev.dv_xname, target_mask, lun); 948 /* 949 * Since we have an established nexus that we can't do 950 * anything with, we must abort it. 951 */ 952 abort = 1; 953 } 954 } 955 956 if (abort) { 957 msg[0] = MSG_ABORT; 958 len = 1; 959 data = msg; 960 phase = PH_MSGOUT; 961 CONTROL = BASE_CMD | CMD_ATTN; 962 sea_transfer_pio(sea, &phase, &len, &data); 963 } else 964 sea->nexus = scb; 965 966 return; 967 } 968 969 /* 970 * Transfer data in given phase using polled I/O. 971 */ 972 int 973 sea_transfer_pio(sea, phase, count, data) 974 struct sea_softc *sea; 975 u_char *phase; 976 int *count; 977 u_char **data; 978 { 979 u_char p = *phase, tmp; 980 int c = *count; 981 u_char *d = *data; 982 int timeout; 983 984 do { 985 /* 986 * Wait for assertion of REQ, after which the phase bits will 987 * be valid. 988 */ 989 for (timeout = 0; timeout < 50000; timeout++) 990 if ((tmp = STATUS) & STAT_REQ) 991 break; 992 if (!(tmp & STAT_REQ)) { 993 printf("%s: timeout waiting for STAT_REQ\n", 994 sea->sc_dev.dv_xname); 995 break; 996 } 997 998 /* 999 * Check for phase mismatch. Reached if the target decides 1000 * that it has finished the transfer. 1001 */ 1002 if (sea->type == FDOMAIN840) 1003 tmp = ((tmp & 0x08) >> 2) | 1004 ((tmp & 0x02) << 2) | 1005 (tmp & 0xf5); 1006 if ((tmp & PH_MASK) != p) 1007 break; 1008 1009 /* Do actual transfer from SCSI bus to/from memory. */ 1010 if (!(p & STAT_IO)) 1011 DATA = *d; 1012 else 1013 *d = DATA; 1014 ++d; 1015 1016 /* 1017 * The SCSI standard suggests that in MSGOUT phase, the 1018 * initiator should drop ATN on the last byte of the message 1019 * phase after REQ has been asserted for the handshake but 1020 * before the initiator raises ACK. 1021 * Don't know how to accomplish this on the ST01/02. 1022 */ 1023 1024 #if 0 1025 /* 1026 * XXX 1027 * The st01 code doesn't wait for STAT_REQ to be deasserted. 1028 * Is this ok? 1029 */ 1030 for (timeout = 0; timeout < 200000L; timeout++) 1031 if (!(STATUS & STAT_REQ)) 1032 break; 1033 if (STATUS & STAT_REQ) 1034 printf("%s: timeout on wait for !STAT_REQ", 1035 sea->sc_dev.dv_xname); 1036 #endif 1037 } while (--c); 1038 1039 *count = c; 1040 *data = d; 1041 tmp = STATUS; 1042 if (tmp & STAT_REQ) 1043 *phase = tmp & PH_MASK; 1044 else 1045 *phase = PH_INVALID; 1046 1047 if (c && (*phase != p)) 1048 return -1; 1049 return 0; 1050 } 1051 1052 /* 1053 * Establish I_T_L or I_T_L_Q nexus for new or existing command including 1054 * ARBITRATION, SELECTION, and initial message out for IDENTIFY and queue 1055 * messages. Return -1 if selection could not execute for some reason, 0 if 1056 * selection succeded or failed because the target did not respond. 1057 */ 1058 int 1059 sea_select(sea, scb) 1060 struct sea_softc *sea; 1061 struct sea_scb *scb; 1062 { 1063 u_char msg[3], phase; 1064 u_char *data; 1065 int len; 1066 int timeout; 1067 1068 CONTROL = BASE_CMD; 1069 DATA = sea->our_id_mask; 1070 CONTROL = (BASE_CMD & ~CMD_INTR) | CMD_START_ARB; 1071 1072 /* wait for arbitration to complete */ 1073 for (timeout = 0; timeout < 3000000L; timeout++) 1074 if (STATUS & STAT_ARB_CMPL) 1075 break; 1076 if (!(STATUS & STAT_ARB_CMPL)) { 1077 if (STATUS & STAT_SEL) { 1078 printf("%s: arbitration lost\n", sea->sc_dev.dv_xname); 1079 scb->flags |= SCB_ERROR; 1080 } else { 1081 printf("%s: arbitration timeout\n", 1082 sea->sc_dev.dv_xname); 1083 scb->flags |= SCB_TIMEOUT; 1084 } 1085 CONTROL = BASE_CMD; 1086 return -1; 1087 } 1088 1089 delay(2); 1090 DATA = (u_char)((1 << scb->xs->xs_periph->periph_target) | 1091 sea->our_id_mask); 1092 CONTROL = 1093 #ifdef SEA_NOMSGS 1094 (BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE | CMD_SEL; 1095 #else 1096 (BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE | CMD_SEL | CMD_ATTN; 1097 #endif 1098 delay(1); 1099 1100 /* wait for a bsy from target */ 1101 for (timeout = 0; timeout < 2000000L; timeout++) 1102 if (STATUS & STAT_BSY) 1103 break; 1104 if (!(STATUS & STAT_BSY)) { 1105 /* should return some error to the higher level driver */ 1106 CONTROL = BASE_CMD; 1107 scb->flags |= SCB_TIMEOUT; 1108 return 0; 1109 } 1110 1111 /* Try to make the target to take a message from us */ 1112 #ifdef SEA_NOMSGS 1113 CONTROL = (BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE; 1114 #else 1115 CONTROL = (BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE | CMD_ATTN; 1116 #endif 1117 delay(1); 1118 1119 /* should start a msg_out phase */ 1120 for (timeout = 0; timeout < 2000000L; timeout++) 1121 if (STATUS & STAT_REQ) 1122 break; 1123 /* Remove ATN. */ 1124 CONTROL = BASE_CMD | CMD_DRVR_ENABLE; 1125 if (!(STATUS & STAT_REQ)) { 1126 /* 1127 * This should not be taken as an error, but more like an 1128 * unsupported feature! Should set a flag indicating that the 1129 * target don't support messages, and continue without failure. 1130 * (THIS IS NOT AN ERROR!) 1131 */ 1132 } else { 1133 msg[0] = MSG_IDENTIFY(scb->xs->xs_periph->periph_lun, 1); 1134 len = 1; 1135 data = msg; 1136 phase = PH_MSGOUT; 1137 /* Should do test on result of sea_transfer_pio(). */ 1138 sea_transfer_pio(sea, &phase, &len, &data); 1139 } 1140 if (!(STATUS & STAT_BSY)) 1141 printf("%s: after successful arbitrate: no STAT_BSY!\n", 1142 sea->sc_dev.dv_xname); 1143 1144 sea->nexus = scb; 1145 sea->busy[scb->xs->xs_periph->periph_target] |= 1146 1 << scb->xs->xs_periph->periph_lun; 1147 /* This assignment should depend on possibility to send a message to target. */ 1148 CONTROL = BASE_CMD | CMD_DRVR_ENABLE; 1149 /* XXX Reset pointer in command? */ 1150 return 0; 1151 } 1152 1153 /* 1154 * Send an abort to the target. Return 1 success, 0 on failure. 1155 */ 1156 int 1157 sea_abort(sea, scb) 1158 struct sea_softc *sea; 1159 struct sea_scb *scb; 1160 { 1161 struct sea_scb *tmp; 1162 u_char msg, phase, *msgptr; 1163 int len; 1164 1165 /* 1166 * If the command hasn't been issued yet, we simply remove it from the 1167 * issue queue 1168 * XXX Could avoid this loop. 1169 */ 1170 for (tmp = sea->ready_list.tqh_first; tmp; tmp = tmp->chain.tqe_next) 1171 if (scb == tmp) { 1172 TAILQ_REMOVE(&sea->ready_list, scb, chain); 1173 /* XXX Set some type of error result for operation. */ 1174 return 1; 1175 } 1176 1177 /* 1178 * If any commands are connected, we're going to fail the abort and let 1179 * the high level SCSI driver retry at a later time or issue a reset. 1180 */ 1181 if (sea->nexus) 1182 return 0; 1183 1184 /* 1185 * If the command is currently disconnected from the bus, and there are 1186 * no connected commands, we reconnect the I_T_L or I_T_L_Q nexus 1187 * associated with it, go into message out, and send an abort message. 1188 */ 1189 for (tmp = sea->nexus_list.tqh_first; tmp; 1190 tmp = tmp->chain.tqe_next) 1191 if (scb == tmp) { 1192 if (sea_select(sea, scb)) 1193 return 0; 1194 1195 msg = MSG_ABORT; 1196 msgptr = &msg; 1197 len = 1; 1198 phase = PH_MSGOUT; 1199 CONTROL = BASE_CMD | CMD_ATTN; 1200 sea_transfer_pio(sea, &phase, &len, &msgptr); 1201 1202 for (tmp = sea->nexus_list.tqh_first; tmp; 1203 tmp = tmp->chain.tqe_next) 1204 if (scb == tmp) { 1205 TAILQ_REMOVE(&sea->nexus_list, 1206 scb, chain); 1207 /* XXX Set some type of error result 1208 for the operation. */ 1209 return 1; 1210 } 1211 } 1212 1213 /* Command not found in any queue; race condition? */ 1214 return 1; 1215 } 1216 1217 void 1218 sea_done(sea, scb) 1219 struct sea_softc *sea; 1220 struct sea_scb *scb; 1221 { 1222 struct scsipi_xfer *xs = scb->xs; 1223 1224 callout_stop(&scb->xs->xs_callout); 1225 1226 xs->resid = scb->datalen; 1227 1228 /* XXXX need to get status */ 1229 if (scb->flags == SCB_ACTIVE) { 1230 xs->resid = 0; 1231 } else { 1232 if (scb->flags & (SCB_TIMEOUT | SCB_ABORTED)) 1233 xs->error = XS_TIMEOUT; 1234 if (scb->flags & SCB_ERROR) 1235 xs->error = XS_DRIVER_STUFFUP; 1236 } 1237 sea_free_scb(sea, scb, xs->xs_control); 1238 scsipi_done(xs); 1239 } 1240 1241 /* 1242 * Wait for completion of command in polled mode. 1243 */ 1244 int 1245 sea_poll(struct sea_softc *sea __unused, struct scsipi_xfer *xs, int count) 1246 { 1247 int s; 1248 1249 while (count) { 1250 /* try to do something */ 1251 s = splbio(); 1252 if (!main_running) 1253 sea_main(); 1254 splx(s); 1255 if (xs->xs_status & XS_STS_DONE) 1256 return 0; 1257 delay(1000); 1258 count--; 1259 } 1260 return 1; 1261 } 1262 1263 /* 1264 * Do the transfer. We know we are connected. Update the flags, and call 1265 * sea_done() when task accomplished. Dialog controlled by the target. 1266 */ 1267 void 1268 sea_information_transfer(sea) 1269 struct sea_softc *sea; 1270 { 1271 int timeout; 1272 u_char msgout = MSG_NOOP; 1273 int len; 1274 int s; 1275 u_char *data; 1276 u_char phase, tmp, old_phase = PH_INVALID; 1277 struct sea_scb *scb = sea->nexus; 1278 int loop; 1279 1280 for (timeout = 0; timeout < 10000000L; timeout++) { 1281 tmp = STATUS; 1282 if (tmp & STAT_PARITY) 1283 printf("%s: parity error detected\n", 1284 sea->sc_dev.dv_xname); 1285 if (!(tmp & STAT_BSY)) { 1286 for (loop = 0; loop < 20; loop++) 1287 if ((tmp = STATUS) & STAT_BSY) 1288 break; 1289 if (!(tmp & STAT_BSY)) { 1290 printf("%s: !STAT_BSY unit in data transfer!\n", 1291 sea->sc_dev.dv_xname); 1292 s = splbio(); 1293 sea->nexus = NULL; 1294 scb->flags = SCB_ERROR; 1295 splx(s); 1296 sea_done(sea, scb); 1297 return; 1298 } 1299 } 1300 1301 /* we only have a valid SCSI phase when REQ is asserted */ 1302 if (!(tmp & STAT_REQ)) 1303 continue; 1304 1305 if (sea->type == FDOMAIN840) 1306 tmp = ((tmp & 0x08) >> 2) | 1307 ((tmp & 0x02) << 2) | 1308 (tmp & 0xf5); 1309 phase = tmp & PH_MASK; 1310 if (phase != old_phase) 1311 old_phase = phase; 1312 1313 switch (phase) { 1314 case PH_DATAOUT: 1315 #ifdef SEA_NODATAOUT 1316 printf("%s: SEA_NODATAOUT set, attempted DATAOUT aborted\n", 1317 sea->sc_dev.dv_xname); 1318 msgout = MSG_ABORT; 1319 CONTROL = BASE_CMD | CMD_ATTN; 1320 break; 1321 #endif 1322 case PH_DATAIN: 1323 if (!scb->data) 1324 printf("no data address!\n"); 1325 #ifdef SEA_BLINDTRANSFER 1326 if (scb->datalen && !(scb->datalen % BLOCK_SIZE)) { 1327 while (scb->datalen) { 1328 for (loop = 0; loop < 50000; loop++) 1329 if ((tmp = STATUS) & STAT_REQ) 1330 break; 1331 if (!(tmp & STAT_REQ)) { 1332 printf("%s: timeout waiting for STAT_REQ\n", 1333 sea->sc_dev.dv_xname); 1334 /* XXX Do something? */ 1335 } 1336 if (sea->type == FDOMAIN840) 1337 tmp = ((tmp & 0x08) >> 2) | 1338 ((tmp & 0x02) << 2) | 1339 (tmp & 0xf5); 1340 if ((tmp & PH_MASK) != phase) 1341 break; 1342 if (!(phase & STAT_IO)) { 1343 #ifdef SEA_ASSEMBLER 1344 caddr_t junk; 1345 __asm("cld\n\t\ 1346 rep\n\t\ 1347 movsl" : 1348 "=S" (scb->data), 1349 "=c" (len), 1350 "=D" (junk) : 1351 "0" (scb->data), 1352 "1" (BLOCK_SIZE >> 2), 1353 "2" (sea->maddr_dr)); 1354 #else 1355 for (len = BLOCK_SIZE; 1356 len; len--) 1357 DATA = *(scb->data++); 1358 #endif 1359 } else { 1360 #ifdef SEA_ASSEMBLER 1361 caddr_t junk; 1362 __asm("cld\n\t\ 1363 rep\n\t\ 1364 movsl" : 1365 "=D" (scb->data), 1366 "=c" (len), 1367 "=S" (junk) : 1368 "0" (scb->data), 1369 "1" (BLOCK_SIZE >> 2), 1370 "2" (sea->maddr_dr)); 1371 #else 1372 for (len = BLOCK_SIZE; 1373 len; len--) 1374 *(scb->data++) = DATA; 1375 #endif 1376 } 1377 scb->datalen -= BLOCK_SIZE; 1378 } 1379 } 1380 #endif 1381 if (scb->datalen) 1382 sea_transfer_pio(sea, &phase, &scb->datalen, 1383 &scb->data); 1384 break; 1385 case PH_MSGIN: 1386 /* Multibyte messages should not be present here. */ 1387 len = 1; 1388 data = &tmp; 1389 sea_transfer_pio(sea, &phase, &len, &data); 1390 /* scb->MessageIn = tmp; */ 1391 1392 switch (tmp) { 1393 case MSG_ABORT: 1394 scb->flags = SCB_ABORTED; 1395 printf("sea: command aborted by target\n"); 1396 CONTROL = BASE_CMD; 1397 sea_done(sea, scb); 1398 return; 1399 case MSG_CMDCOMPLETE: 1400 s = splbio(); 1401 sea->nexus = NULL; 1402 splx(s); 1403 sea->busy[scb->xs->xs_periph->periph_target] &= 1404 ~(1 << scb->xs->xs_periph->periph_lun); 1405 CONTROL = BASE_CMD; 1406 sea_done(sea, scb); 1407 return; 1408 case MSG_MESSAGE_REJECT: 1409 printf("%s: message_reject received\n", 1410 sea->sc_dev.dv_xname); 1411 break; 1412 case MSG_DISCONNECT: 1413 s = splbio(); 1414 TAILQ_INSERT_TAIL(&sea->nexus_list, 1415 scb, chain); 1416 sea->nexus = NULL; 1417 CONTROL = BASE_CMD; 1418 splx(s); 1419 return; 1420 case MSG_SAVEDATAPOINTER: 1421 case MSG_RESTOREPOINTERS: 1422 /* save/restore of pointers are ignored */ 1423 break; 1424 default: 1425 /* 1426 * This should be handled in the pio data 1427 * transfer phase, as the ATN should be raised 1428 * before ACK goes false when rejecting a 1429 * message. 1430 */ 1431 printf("%s: unknown message in: %x\n", 1432 sea->sc_dev.dv_xname, tmp); 1433 break; 1434 } /* switch (tmp) */ 1435 break; 1436 case PH_MSGOUT: 1437 len = 1; 1438 data = &msgout; 1439 /* sea->last_message = msgout; */ 1440 sea_transfer_pio(sea, &phase, &len, &data); 1441 if (msgout == MSG_ABORT) { 1442 printf("%s: sent message abort to target\n", 1443 sea->sc_dev.dv_xname); 1444 s = splbio(); 1445 sea->busy[scb->xs->xs_periph->periph_target] &= 1446 ~(1 << scb->xs->xs_periph->periph_lun); 1447 sea->nexus = NULL; 1448 scb->flags = SCB_ABORTED; 1449 splx(s); 1450 /* enable interrupt from scsi */ 1451 sea_done(sea, scb); 1452 return; 1453 } 1454 msgout = MSG_NOOP; 1455 break; 1456 case PH_CMD: 1457 len = scb->xs->cmdlen; 1458 data = (char *) scb->xs->cmd; 1459 sea_transfer_pio(sea, &phase, &len, &data); 1460 break; 1461 case PH_STAT: 1462 len = 1; 1463 data = &tmp; 1464 sea_transfer_pio(sea, &phase, &len, &data); 1465 scb->xs->status = tmp; 1466 break; 1467 default: 1468 printf("sea: unknown phase\n"); 1469 } /* switch (phase) */ 1470 } /* for (...) */ 1471 1472 /* If we get here we have got a timeout! */ 1473 printf("%s: timeout in data transfer\n", sea->sc_dev.dv_xname); 1474 scb->flags = SCB_TIMEOUT; 1475 /* XXX Should I clear scsi-bus state? */ 1476 sea_done(sea, scb); 1477 } 1478
Indexes created Tue Sep 30 07:10:03 GMT 2025