1 /* 2 * Core routines and tables shareable across OS platforms. 3 * 4 * Copyright (c) 1994-2002 Justin T. Gibbs. 5 * Copyright (c) 2000-2002 Adaptec Inc. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions, and the following disclaimer, 13 * without modification. 14 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 15 * substantially similar to the "NO WARRANTY" disclaimer below 16 * ("Disclaimer") and any redistribution must be conditioned upon 17 * including a substantially similar Disclaimer requirement for further 18 * binary redistribution. 19 * 3. Neither the names of the above-listed copyright holders nor the names 20 * of any contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * Alternatively, this software may be distributed under the terms of the 24 * GNU General Public License ("GPL") version 2 as published by the Free 25 * Software Foundation. 26 * 27 * NO WARRANTY 28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 32 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 36 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 37 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 38 * POSSIBILITY OF SUCH DAMAGES. 39 * 40 * $Id: //depot/aic7xxx/aic7xxx/aic7xxx.c#155 $ 41 */ 42 43 #include "aic7xxx_osm.h" 44 #include "aic7xxx_inline.h" 45 #include "aicasm/aicasm_insformat.h" 46 47 /***************************** Lookup Tables **********************************/ 48 static const char *const ahc_chip_names[] = { 49 "NONE", 50 "aic7770", 51 "aic7850", 52 "aic7855", 53 "aic7859", 54 "aic7860", 55 "aic7870", 56 "aic7880", 57 "aic7895", 58 "aic7895C", 59 "aic7890/91", 60 "aic7896/97", 61 "aic7892", 62 "aic7899" 63 }; 64 65 /* 66 * Hardware error codes. 67 */ 68 struct ahc_hard_error_entry { 69 uint8_t errno; 70 const char *errmesg; 71 }; 72 73 static const struct ahc_hard_error_entry ahc_hard_errors[] = { 74 { ILLHADDR, "Illegal Host Access" }, 75 { ILLSADDR, "Illegal Sequencer Address referenced" }, 76 { ILLOPCODE, "Illegal Opcode in sequencer program" }, 77 { SQPARERR, "Sequencer Parity Error" }, 78 { DPARERR, "Data-path Parity Error" }, 79 { MPARERR, "Scratch or SCB Memory Parity Error" }, 80 { PCIERRSTAT, "PCI Error detected" }, 81 { CIOPARERR, "CIOBUS Parity Error" }, 82 }; 83 static const u_int num_errors = ARRAY_SIZE(ahc_hard_errors); 84 85 static const struct ahc_phase_table_entry ahc_phase_table[] = 86 { 87 { P_DATAOUT, NOP, "in Data-out phase" }, 88 { P_DATAIN, INITIATOR_ERROR, "in Data-in phase" }, 89 { P_DATAOUT_DT, NOP, "in DT Data-out phase" }, 90 { P_DATAIN_DT, INITIATOR_ERROR, "in DT Data-in phase" }, 91 { P_COMMAND, NOP, "in Command phase" }, 92 { P_MESGOUT, NOP, "in Message-out phase" }, 93 { P_STATUS, INITIATOR_ERROR, "in Status phase" }, 94 { P_MESGIN, MSG_PARITY_ERROR, "in Message-in phase" }, 95 { P_BUSFREE, NOP, "while idle" }, 96 { 0, NOP, "in unknown phase" } 97 }; 98 99 /* 100 * In most cases we only wish to itterate over real phases, so 101 * exclude the last element from the count. 102 */ 103 static const u_int num_phases = ARRAY_SIZE(ahc_phase_table) - 1; 104 105 /* 106 * Valid SCSIRATE values. (p. 3-17) 107 * Provides a mapping of tranfer periods in ns to the proper value to 108 * stick in the scsixfer reg. 109 */ 110 static const struct ahc_syncrate ahc_syncrates[] = 111 { 112 /* ultra2 fast/ultra period rate */ 113 { 0x42, 0x000, 9, "80.0" }, 114 { 0x03, 0x000, 10, "40.0" }, 115 { 0x04, 0x000, 11, "33.0" }, 116 { 0x05, 0x100, 12, "20.0" }, 117 { 0x06, 0x110, 15, "16.0" }, 118 { 0x07, 0x120, 18, "13.4" }, 119 { 0x08, 0x000, 25, "10.0" }, 120 { 0x19, 0x010, 31, "8.0" }, 121 { 0x1a, 0x020, 37, "6.67" }, 122 { 0x1b, 0x030, 43, "5.7" }, 123 { 0x1c, 0x040, 50, "5.0" }, 124 { 0x00, 0x050, 56, "4.4" }, 125 { 0x00, 0x060, 62, "4.0" }, 126 { 0x00, 0x070, 68, "3.6" }, 127 { 0x00, 0x000, 0, NULL } 128 }; 129 130 /* Our Sequencer Program */ 131 #include "aic7xxx_seq.h" 132 133 /**************************** Function Declarations ***************************/ 134 static void ahc_force_renegotiation(struct ahc_softc *ahc, 135 struct ahc_devinfo *devinfo); 136 static struct ahc_tmode_tstate* 137 ahc_alloc_tstate(struct ahc_softc *ahc, 138 u_int scsi_id, char channel); 139 #ifdef AHC_TARGET_MODE 140 static void ahc_free_tstate(struct ahc_softc *ahc, 141 u_int scsi_id, char channel, int force); 142 #endif 143 static const struct ahc_syncrate* 144 ahc_devlimited_syncrate(struct ahc_softc *ahc, 145 struct ahc_initiator_tinfo *, 146 u_int *period, 147 u_int *ppr_options, 148 role_t role); 149 static void ahc_update_pending_scbs(struct ahc_softc *ahc); 150 static void ahc_fetch_devinfo(struct ahc_softc *ahc, 151 struct ahc_devinfo *devinfo); 152 static void ahc_scb_devinfo(struct ahc_softc *ahc, 153 struct ahc_devinfo *devinfo, 154 struct scb *scb); 155 static void ahc_assert_atn(struct ahc_softc *ahc); 156 static void ahc_setup_initiator_msgout(struct ahc_softc *ahc, 157 struct ahc_devinfo *devinfo, 158 struct scb *scb); 159 static void ahc_build_transfer_msg(struct ahc_softc *ahc, 160 struct ahc_devinfo *devinfo); 161 static void ahc_construct_sdtr(struct ahc_softc *ahc, 162 struct ahc_devinfo *devinfo, 163 u_int period, u_int offset); 164 static void ahc_construct_wdtr(struct ahc_softc *ahc, 165 struct ahc_devinfo *devinfo, 166 u_int bus_width); 167 static void ahc_construct_ppr(struct ahc_softc *ahc, 168 struct ahc_devinfo *devinfo, 169 u_int period, u_int offset, 170 u_int bus_width, u_int ppr_options); 171 static void ahc_clear_msg_state(struct ahc_softc *ahc); 172 static void ahc_handle_proto_violation(struct ahc_softc *ahc); 173 static void ahc_handle_message_phase(struct ahc_softc *ahc); 174 typedef enum { 175 AHCMSG_1B, 176 AHCMSG_2B, 177 AHCMSG_EXT 178 } ahc_msgtype; 179 static int ahc_sent_msg(struct ahc_softc *ahc, ahc_msgtype type, 180 u_int msgval, int full); 181 static int ahc_parse_msg(struct ahc_softc *ahc, 182 struct ahc_devinfo *devinfo); 183 static int ahc_handle_msg_reject(struct ahc_softc *ahc, 184 struct ahc_devinfo *devinfo); 185 static void ahc_handle_ign_wide_residue(struct ahc_softc *ahc, 186 struct ahc_devinfo *devinfo); 187 static void ahc_reinitialize_dataptrs(struct ahc_softc *ahc); 188 static void ahc_handle_devreset(struct ahc_softc *ahc, 189 struct ahc_devinfo *devinfo, 190 cam_status status, char *message, 191 int verbose_level); 192 #ifdef AHC_TARGET_MODE 193 static void ahc_setup_target_msgin(struct ahc_softc *ahc, 194 struct ahc_devinfo *devinfo, 195 struct scb *scb); 196 #endif 197 198 static bus_dmamap_callback_t ahc_dmamap_cb; 199 static void ahc_build_free_scb_list(struct ahc_softc *ahc); 200 static int ahc_init_scbdata(struct ahc_softc *ahc); 201 static void ahc_fini_scbdata(struct ahc_softc *ahc); 202 static void ahc_qinfifo_requeue(struct ahc_softc *ahc, 203 struct scb *prev_scb, 204 struct scb *scb); 205 static int ahc_qinfifo_count(struct ahc_softc *ahc); 206 static u_int ahc_rem_scb_from_disc_list(struct ahc_softc *ahc, 207 u_int prev, u_int scbptr); 208 static void ahc_add_curscb_to_free_list(struct ahc_softc *ahc); 209 static u_int ahc_rem_wscb(struct ahc_softc *ahc, 210 u_int scbpos, u_int prev); 211 static void ahc_reset_current_bus(struct ahc_softc *ahc); 212 #ifdef AHC_DUMP_SEQ 213 static void ahc_dumpseq(struct ahc_softc *ahc); 214 #endif 215 static int ahc_loadseq(struct ahc_softc *ahc); 216 static int ahc_check_patch(struct ahc_softc *ahc, 217 const struct patch **start_patch, 218 u_int start_instr, u_int *skip_addr); 219 static void ahc_download_instr(struct ahc_softc *ahc, 220 u_int instrptr, uint8_t *dconsts); 221 #ifdef AHC_TARGET_MODE 222 static void ahc_queue_lstate_event(struct ahc_softc *ahc, 223 struct ahc_tmode_lstate *lstate, 224 u_int initiator_id, 225 u_int event_type, 226 u_int event_arg); 227 static void ahc_update_scsiid(struct ahc_softc *ahc, 228 u_int targid_mask); 229 static int ahc_handle_target_cmd(struct ahc_softc *ahc, 230 struct target_cmd *cmd); 231 #endif 232 233 static u_int ahc_index_busy_tcl(struct ahc_softc *ahc, u_int tcl); 234 static void ahc_unbusy_tcl(struct ahc_softc *ahc, u_int tcl); 235 static void ahc_busy_tcl(struct ahc_softc *ahc, 236 u_int tcl, u_int busyid); 237 238 /************************** SCB and SCB queue management **********************/ 239 static void ahc_run_untagged_queues(struct ahc_softc *ahc); 240 static void ahc_run_untagged_queue(struct ahc_softc *ahc, 241 struct scb_tailq *queue); 242 243 /****************************** Initialization ********************************/ 244 static void ahc_alloc_scbs(struct ahc_softc *ahc); 245 static void ahc_shutdown(void *arg); 246 247 /*************************** Interrupt Services *******************************/ 248 static void ahc_clear_intstat(struct ahc_softc *ahc); 249 static void ahc_run_qoutfifo(struct ahc_softc *ahc); 250 #ifdef AHC_TARGET_MODE 251 static void ahc_run_tqinfifo(struct ahc_softc *ahc, int paused); 252 #endif 253 static void ahc_handle_brkadrint(struct ahc_softc *ahc); 254 static void ahc_handle_seqint(struct ahc_softc *ahc, u_int intstat); 255 static void ahc_handle_scsiint(struct ahc_softc *ahc, 256 u_int intstat); 257 static void ahc_clear_critical_section(struct ahc_softc *ahc); 258 259 /***************************** Error Recovery *********************************/ 260 static void ahc_freeze_devq(struct ahc_softc *ahc, struct scb *scb); 261 static int ahc_abort_scbs(struct ahc_softc *ahc, int target, 262 char channel, int lun, u_int tag, 263 role_t role, uint32_t status); 264 static void ahc_calc_residual(struct ahc_softc *ahc, 265 struct scb *scb); 266 267 /*********************** Untagged Transaction Routines ************************/ 268 static inline void ahc_freeze_untagged_queues(struct ahc_softc *ahc); 269 static inline void ahc_release_untagged_queues(struct ahc_softc *ahc); 270 271 /* 272 * Block our completion routine from starting the next untagged 273 * transaction for this target or target lun. 274 */ 275 static inline void ahc_freeze_untagged_queues(struct ahc_softc * ahc)276 ahc_freeze_untagged_queues(struct ahc_softc *ahc) 277 { 278 if ((ahc->flags & AHC_SCB_BTT) == 0) 279 ahc->untagged_queue_lock++; 280 } 281 282 /* 283 * Allow the next untagged transaction for this target or target lun 284 * to be executed. We use a counting semaphore to allow the lock 285 * to be acquired recursively. Once the count drops to zero, the 286 * transaction queues will be run. 287 */ 288 static inline void ahc_release_untagged_queues(struct ahc_softc * ahc)289 ahc_release_untagged_queues(struct ahc_softc *ahc) 290 { 291 if ((ahc->flags & AHC_SCB_BTT) == 0) { 292 ahc->untagged_queue_lock--; 293 if (ahc->untagged_queue_lock == 0) 294 ahc_run_untagged_queues(ahc); 295 } 296 } 297 298 /************************* Sequencer Execution Control ************************/ 299 /* 300 * Work around any chip bugs related to halting sequencer execution. 301 * On Ultra2 controllers, we must clear the CIOBUS stretch signal by 302 * reading a register that will set this signal and deassert it. 303 * Without this workaround, if the chip is paused, by an interrupt or 304 * manual pause while accessing scb ram, accesses to certain registers 305 * will hang the system (infinite pci retries). 306 */ 307 static void ahc_pause_bug_fix(struct ahc_softc * ahc)308 ahc_pause_bug_fix(struct ahc_softc *ahc) 309 { 310 if ((ahc->features & AHC_ULTRA2) != 0) 311 (void)ahc_inb(ahc, CCSCBCTL); 312 } 313 314 /* 315 * Determine whether the sequencer has halted code execution. 316 * Returns non-zero status if the sequencer is stopped. 317 */ 318 int ahc_is_paused(struct ahc_softc * ahc)319 ahc_is_paused(struct ahc_softc *ahc) 320 { 321 return ((ahc_inb(ahc, HCNTRL) & PAUSE) != 0); 322 } 323 324 /* 325 * Request that the sequencer stop and wait, indefinitely, for it 326 * to stop. The sequencer will only acknowledge that it is paused 327 * once it has reached an instruction boundary and PAUSEDIS is 328 * cleared in the SEQCTL register. The sequencer may use PAUSEDIS 329 * for critical sections. 330 */ 331 void ahc_pause(struct ahc_softc * ahc)332 ahc_pause(struct ahc_softc *ahc) 333 { 334 ahc_outb(ahc, HCNTRL, ahc->pause); 335 336 /* 337 * Since the sequencer can disable pausing in a critical section, we 338 * must loop until it actually stops. 339 */ 340 while (ahc_is_paused(ahc) == 0) 341 ; 342 343 ahc_pause_bug_fix(ahc); 344 } 345 346 /* 347 * Allow the sequencer to continue program execution. 348 * We check here to ensure that no additional interrupt 349 * sources that would cause the sequencer to halt have been 350 * asserted. If, for example, a SCSI bus reset is detected 351 * while we are fielding a different, pausing, interrupt type, 352 * we don't want to release the sequencer before going back 353 * into our interrupt handler and dealing with this new 354 * condition. 355 */ 356 void ahc_unpause(struct ahc_softc * ahc)357 ahc_unpause(struct ahc_softc *ahc) 358 { 359 if ((ahc_inb(ahc, INTSTAT) & (SCSIINT | SEQINT | BRKADRINT)) == 0) 360 ahc_outb(ahc, HCNTRL, ahc->unpause); 361 } 362 363 /************************** Memory mapping routines ***************************/ 364 static struct ahc_dma_seg * ahc_sg_bus_to_virt(struct scb * scb,uint32_t sg_busaddr)365 ahc_sg_bus_to_virt(struct scb *scb, uint32_t sg_busaddr) 366 { 367 int sg_index; 368 369 sg_index = (sg_busaddr - scb->sg_list_phys)/sizeof(struct ahc_dma_seg); 370 /* sg_list_phys points to entry 1, not 0 */ 371 sg_index++; 372 373 return (&scb->sg_list[sg_index]); 374 } 375 376 static uint32_t ahc_sg_virt_to_bus(struct scb * scb,struct ahc_dma_seg * sg)377 ahc_sg_virt_to_bus(struct scb *scb, struct ahc_dma_seg *sg) 378 { 379 int sg_index; 380 381 /* sg_list_phys points to entry 1, not 0 */ 382 sg_index = sg - &scb->sg_list[1]; 383 384 return (scb->sg_list_phys + (sg_index * sizeof(*scb->sg_list))); 385 } 386 387 static uint32_t ahc_hscb_busaddr(struct ahc_softc * ahc,u_int index)388 ahc_hscb_busaddr(struct ahc_softc *ahc, u_int index) 389 { 390 return (ahc->scb_data->hscb_busaddr 391 + (sizeof(struct hardware_scb) * index)); 392 } 393 394 static void ahc_sync_scb(struct ahc_softc * ahc,struct scb * scb,int op)395 ahc_sync_scb(struct ahc_softc *ahc, struct scb *scb, int op) 396 { 397 ahc_dmamap_sync(ahc, ahc->scb_data->hscb_dmat, 398 ahc->scb_data->hscb_dmamap, 399 /*offset*/(scb->hscb - ahc->hscbs) * sizeof(*scb->hscb), 400 /*len*/sizeof(*scb->hscb), op); 401 } 402 403 void ahc_sync_sglist(struct ahc_softc * ahc,struct scb * scb,int op)404 ahc_sync_sglist(struct ahc_softc *ahc, struct scb *scb, int op) 405 { 406 if (scb->sg_count == 0) 407 return; 408 409 ahc_dmamap_sync(ahc, ahc->scb_data->sg_dmat, scb->sg_map->sg_dmamap, 410 /*offset*/(scb->sg_list - scb->sg_map->sg_vaddr) 411 * sizeof(struct ahc_dma_seg), 412 /*len*/sizeof(struct ahc_dma_seg) * scb->sg_count, op); 413 } 414 415 #ifdef AHC_TARGET_MODE 416 static uint32_t ahc_targetcmd_offset(struct ahc_softc * ahc,u_int index)417 ahc_targetcmd_offset(struct ahc_softc *ahc, u_int index) 418 { 419 return (((uint8_t *)&ahc->targetcmds[index]) - ahc->qoutfifo); 420 } 421 #endif 422 423 /*********************** Miscellaneous Support Functions ***********************/ 424 /* 425 * Determine whether the sequencer reported a residual 426 * for this SCB/transaction. 427 */ 428 static void ahc_update_residual(struct ahc_softc * ahc,struct scb * scb)429 ahc_update_residual(struct ahc_softc *ahc, struct scb *scb) 430 { 431 uint32_t sgptr; 432 433 sgptr = ahc_le32toh(scb->hscb->sgptr); 434 if ((sgptr & SG_RESID_VALID) != 0) 435 ahc_calc_residual(ahc, scb); 436 } 437 438 /* 439 * Return pointers to the transfer negotiation information 440 * for the specified our_id/remote_id pair. 441 */ 442 struct ahc_initiator_tinfo * ahc_fetch_transinfo(struct ahc_softc * ahc,char channel,u_int our_id,u_int remote_id,struct ahc_tmode_tstate ** tstate)443 ahc_fetch_transinfo(struct ahc_softc *ahc, char channel, u_int our_id, 444 u_int remote_id, struct ahc_tmode_tstate **tstate) 445 { 446 /* 447 * Transfer data structures are stored from the perspective 448 * of the target role. Since the parameters for a connection 449 * in the initiator role to a given target are the same as 450 * when the roles are reversed, we pretend we are the target. 451 */ 452 if (channel == 'B') 453 our_id += 8; 454 *tstate = ahc->enabled_targets[our_id]; 455 return (&(*tstate)->transinfo[remote_id]); 456 } 457 458 uint16_t ahc_inw(struct ahc_softc * ahc,u_int port)459 ahc_inw(struct ahc_softc *ahc, u_int port) 460 { 461 uint16_t r = ahc_inb(ahc, port+1) << 8; 462 return r | ahc_inb(ahc, port); 463 } 464 465 void ahc_outw(struct ahc_softc * ahc,u_int port,u_int value)466 ahc_outw(struct ahc_softc *ahc, u_int port, u_int value) 467 { 468 ahc_outb(ahc, port, value & 0xFF); 469 ahc_outb(ahc, port+1, (value >> 8) & 0xFF); 470 } 471 472 uint32_t ahc_inl(struct ahc_softc * ahc,u_int port)473 ahc_inl(struct ahc_softc *ahc, u_int port) 474 { 475 return ((ahc_inb(ahc, port)) 476 | (ahc_inb(ahc, port+1) << 8) 477 | (ahc_inb(ahc, port+2) << 16) 478 | (ahc_inb(ahc, port+3) << 24)); 479 } 480 481 void ahc_outl(struct ahc_softc * ahc,u_int port,uint32_t value)482 ahc_outl(struct ahc_softc *ahc, u_int port, uint32_t value) 483 { 484 ahc_outb(ahc, port, (value) & 0xFF); 485 ahc_outb(ahc, port+1, ((value) >> 8) & 0xFF); 486 ahc_outb(ahc, port+2, ((value) >> 16) & 0xFF); 487 ahc_outb(ahc, port+3, ((value) >> 24) & 0xFF); 488 } 489 490 uint64_t ahc_inq(struct ahc_softc * ahc,u_int port)491 ahc_inq(struct ahc_softc *ahc, u_int port) 492 { 493 return ((ahc_inb(ahc, port)) 494 | (ahc_inb(ahc, port+1) << 8) 495 | (ahc_inb(ahc, port+2) << 16) 496 | (((uint64_t)ahc_inb(ahc, port+3)) << 24) 497 | (((uint64_t)ahc_inb(ahc, port+4)) << 32) 498 | (((uint64_t)ahc_inb(ahc, port+5)) << 40) 499 | (((uint64_t)ahc_inb(ahc, port+6)) << 48) 500 | (((uint64_t)ahc_inb(ahc, port+7)) << 56)); 501 } 502 503 void ahc_outq(struct ahc_softc * ahc,u_int port,uint64_t value)504 ahc_outq(struct ahc_softc *ahc, u_int port, uint64_t value) 505 { 506 ahc_outb(ahc, port, value & 0xFF); 507 ahc_outb(ahc, port+1, (value >> 8) & 0xFF); 508 ahc_outb(ahc, port+2, (value >> 16) & 0xFF); 509 ahc_outb(ahc, port+3, (value >> 24) & 0xFF); 510 ahc_outb(ahc, port+4, (value >> 32) & 0xFF); 511 ahc_outb(ahc, port+5, (value >> 40) & 0xFF); 512 ahc_outb(ahc, port+6, (value >> 48) & 0xFF); 513 ahc_outb(ahc, port+7, (value >> 56) & 0xFF); 514 } 515 516 /* 517 * Get a free scb. If there are none, see if we can allocate a new SCB. 518 */ 519 struct scb * ahc_get_scb(struct ahc_softc * ahc)520 ahc_get_scb(struct ahc_softc *ahc) 521 { 522 struct scb *scb; 523 524 if ((scb = SLIST_FIRST(&ahc->scb_data->free_scbs)) == NULL) { 525 ahc_alloc_scbs(ahc); 526 scb = SLIST_FIRST(&ahc->scb_data->free_scbs); 527 if (scb == NULL) 528 return (NULL); 529 } 530 SLIST_REMOVE_HEAD(&ahc->scb_data->free_scbs, links.sle); 531 return (scb); 532 } 533 534 /* 535 * Return an SCB resource to the free list. 536 */ 537 void ahc_free_scb(struct ahc_softc * ahc,struct scb * scb)538 ahc_free_scb(struct ahc_softc *ahc, struct scb *scb) 539 { 540 struct hardware_scb *hscb; 541 542 hscb = scb->hscb; 543 /* Clean up for the next user */ 544 ahc->scb_data->scbindex[hscb->tag] = NULL; 545 scb->flags = SCB_FREE; 546 hscb->control = 0; 547 548 SLIST_INSERT_HEAD(&ahc->scb_data->free_scbs, scb, links.sle); 549 550 /* Notify the OSM that a resource is now available. */ 551 ahc_platform_scb_free(ahc, scb); 552 } 553 554 struct scb * ahc_lookup_scb(struct ahc_softc * ahc,u_int tag)555 ahc_lookup_scb(struct ahc_softc *ahc, u_int tag) 556 { 557 struct scb* scb; 558 559 scb = ahc->scb_data->scbindex[tag]; 560 if (scb != NULL) 561 ahc_sync_scb(ahc, scb, 562 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 563 return (scb); 564 } 565 566 static void ahc_swap_with_next_hscb(struct ahc_softc * ahc,struct scb * scb)567 ahc_swap_with_next_hscb(struct ahc_softc *ahc, struct scb *scb) 568 { 569 struct hardware_scb *q_hscb; 570 u_int saved_tag; 571 572 /* 573 * Our queuing method is a bit tricky. The card 574 * knows in advance which HSCB to download, and we 575 * can't disappoint it. To achieve this, the next 576 * SCB to download is saved off in ahc->next_queued_scb. 577 * When we are called to queue "an arbitrary scb", 578 * we copy the contents of the incoming HSCB to the one 579 * the sequencer knows about, swap HSCB pointers and 580 * finally assign the SCB to the tag indexed location 581 * in the scb_array. This makes sure that we can still 582 * locate the correct SCB by SCB_TAG. 583 */ 584 q_hscb = ahc->next_queued_scb->hscb; 585 saved_tag = q_hscb->tag; 586 memcpy(q_hscb, scb->hscb, sizeof(*scb->hscb)); 587 if ((scb->flags & SCB_CDB32_PTR) != 0) { 588 q_hscb->shared_data.cdb_ptr = 589 ahc_htole32(ahc_hscb_busaddr(ahc, q_hscb->tag) 590 + offsetof(struct hardware_scb, cdb32)); 591 } 592 q_hscb->tag = saved_tag; 593 q_hscb->next = scb->hscb->tag; 594 595 /* Now swap HSCB pointers. */ 596 ahc->next_queued_scb->hscb = scb->hscb; 597 scb->hscb = q_hscb; 598 599 /* Now define the mapping from tag to SCB in the scbindex */ 600 ahc->scb_data->scbindex[scb->hscb->tag] = scb; 601 } 602 603 /* 604 * Tell the sequencer about a new transaction to execute. 605 */ 606 void ahc_queue_scb(struct ahc_softc * ahc,struct scb * scb)607 ahc_queue_scb(struct ahc_softc *ahc, struct scb *scb) 608 { 609 ahc_swap_with_next_hscb(ahc, scb); 610 611 if (scb->hscb->tag == SCB_LIST_NULL 612 || scb->hscb->next == SCB_LIST_NULL) 613 panic("Attempt to queue invalid SCB tag %x:%x\n", 614 scb->hscb->tag, scb->hscb->next); 615 616 /* 617 * Setup data "oddness". 618 */ 619 scb->hscb->lun &= LID; 620 if (ahc_get_transfer_length(scb) & 0x1) 621 scb->hscb->lun |= SCB_XFERLEN_ODD; 622 623 /* 624 * Keep a history of SCBs we've downloaded in the qinfifo. 625 */ 626 ahc->qinfifo[ahc->qinfifonext++] = scb->hscb->tag; 627 628 /* 629 * Make sure our data is consistent from the 630 * perspective of the adapter. 631 */ 632 ahc_sync_scb(ahc, scb, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 633 634 /* Tell the adapter about the newly queued SCB */ 635 if ((ahc->features & AHC_QUEUE_REGS) != 0) { 636 ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext); 637 } else { 638 if ((ahc->features & AHC_AUTOPAUSE) == 0) 639 ahc_pause(ahc); 640 ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext); 641 if ((ahc->features & AHC_AUTOPAUSE) == 0) 642 ahc_unpause(ahc); 643 } 644 } 645 646 struct scsi_sense_data * ahc_get_sense_buf(struct ahc_softc * ahc,struct scb * scb)647 ahc_get_sense_buf(struct ahc_softc *ahc, struct scb *scb) 648 { 649 int offset; 650 651 offset = scb - ahc->scb_data->scbarray; 652 return (&ahc->scb_data->sense[offset]); 653 } 654 655 static uint32_t ahc_get_sense_bufaddr(struct ahc_softc * ahc,struct scb * scb)656 ahc_get_sense_bufaddr(struct ahc_softc *ahc, struct scb *scb) 657 { 658 int offset; 659 660 offset = scb - ahc->scb_data->scbarray; 661 return (ahc->scb_data->sense_busaddr 662 + (offset * sizeof(struct scsi_sense_data))); 663 } 664 665 /************************** Interrupt Processing ******************************/ 666 static void ahc_sync_qoutfifo(struct ahc_softc * ahc,int op)667 ahc_sync_qoutfifo(struct ahc_softc *ahc, int op) 668 { 669 ahc_dmamap_sync(ahc, ahc->shared_data_dmat, ahc->shared_data_dmamap, 670 /*offset*/0, /*len*/256, op); 671 } 672 673 static void ahc_sync_tqinfifo(struct ahc_softc * ahc,int op)674 ahc_sync_tqinfifo(struct ahc_softc *ahc, int op) 675 { 676 #ifdef AHC_TARGET_MODE 677 if ((ahc->flags & AHC_TARGETROLE) != 0) { 678 ahc_dmamap_sync(ahc, ahc->shared_data_dmat, 679 ahc->shared_data_dmamap, 680 ahc_targetcmd_offset(ahc, 0), 681 sizeof(struct target_cmd) * AHC_TMODE_CMDS, 682 op); 683 } 684 #endif 685 } 686 687 /* 688 * See if the firmware has posted any completed commands 689 * into our in-core command complete fifos. 690 */ 691 #define AHC_RUN_QOUTFIFO 0x1 692 #define AHC_RUN_TQINFIFO 0x2 693 static u_int ahc_check_cmdcmpltqueues(struct ahc_softc * ahc)694 ahc_check_cmdcmpltqueues(struct ahc_softc *ahc) 695 { 696 u_int retval; 697 698 retval = 0; 699 ahc_dmamap_sync(ahc, ahc->shared_data_dmat, ahc->shared_data_dmamap, 700 /*offset*/ahc->qoutfifonext, /*len*/1, 701 BUS_DMASYNC_POSTREAD); 702 if (ahc->qoutfifo[ahc->qoutfifonext] != SCB_LIST_NULL) 703 retval |= AHC_RUN_QOUTFIFO; 704 #ifdef AHC_TARGET_MODE 705 if ((ahc->flags & AHC_TARGETROLE) != 0 706 && (ahc->flags & AHC_TQINFIFO_BLOCKED) == 0) { 707 ahc_dmamap_sync(ahc, ahc->shared_data_dmat, 708 ahc->shared_data_dmamap, 709 ahc_targetcmd_offset(ahc, ahc->tqinfifofnext), 710 /*len*/sizeof(struct target_cmd), 711 BUS_DMASYNC_POSTREAD); 712 if (ahc->targetcmds[ahc->tqinfifonext].cmd_valid != 0) 713 retval |= AHC_RUN_TQINFIFO; 714 } 715 #endif 716 return (retval); 717 } 718 719 /* 720 * Catch an interrupt from the adapter 721 */ 722 int ahc_intr(struct ahc_softc * ahc)723 ahc_intr(struct ahc_softc *ahc) 724 { 725 u_int intstat; 726 727 if ((ahc->pause & INTEN) == 0) { 728 /* 729 * Our interrupt is not enabled on the chip 730 * and may be disabled for re-entrancy reasons, 731 * so just return. This is likely just a shared 732 * interrupt. 733 */ 734 return (0); 735 } 736 /* 737 * Instead of directly reading the interrupt status register, 738 * infer the cause of the interrupt by checking our in-core 739 * completion queues. This avoids a costly PCI bus read in 740 * most cases. 741 */ 742 if ((ahc->flags & (AHC_ALL_INTERRUPTS|AHC_EDGE_INTERRUPT)) == 0 743 && (ahc_check_cmdcmpltqueues(ahc) != 0)) 744 intstat = CMDCMPLT; 745 else { 746 intstat = ahc_inb(ahc, INTSTAT); 747 } 748 749 if ((intstat & INT_PEND) == 0) { 750 #if AHC_PCI_CONFIG > 0 751 if (ahc->unsolicited_ints > 500) { 752 ahc->unsolicited_ints = 0; 753 if ((ahc->chip & AHC_PCI) != 0 754 && (ahc_inb(ahc, ERROR) & PCIERRSTAT) != 0) 755 ahc->bus_intr(ahc); 756 } 757 #endif 758 ahc->unsolicited_ints++; 759 return (0); 760 } 761 ahc->unsolicited_ints = 0; 762 763 if (intstat & CMDCMPLT) { 764 ahc_outb(ahc, CLRINT, CLRCMDINT); 765 766 /* 767 * Ensure that the chip sees that we've cleared 768 * this interrupt before we walk the output fifo. 769 * Otherwise, we may, due to posted bus writes, 770 * clear the interrupt after we finish the scan, 771 * and after the sequencer has added new entries 772 * and asserted the interrupt again. 773 */ 774 ahc_flush_device_writes(ahc); 775 ahc_run_qoutfifo(ahc); 776 #ifdef AHC_TARGET_MODE 777 if ((ahc->flags & AHC_TARGETROLE) != 0) 778 ahc_run_tqinfifo(ahc, /*paused*/FALSE); 779 #endif 780 } 781 782 /* 783 * Handle statuses that may invalidate our cached 784 * copy of INTSTAT separately. 785 */ 786 if (intstat == 0xFF && (ahc->features & AHC_REMOVABLE) != 0) { 787 /* Hot eject. Do nothing */ 788 } else if (intstat & BRKADRINT) { 789 ahc_handle_brkadrint(ahc); 790 } else if ((intstat & (SEQINT|SCSIINT)) != 0) { 791 792 ahc_pause_bug_fix(ahc); 793 794 if ((intstat & SEQINT) != 0) 795 ahc_handle_seqint(ahc, intstat); 796 797 if ((intstat & SCSIINT) != 0) 798 ahc_handle_scsiint(ahc, intstat); 799 } 800 return (1); 801 } 802 803 /************************* Sequencer Execution Control ************************/ 804 /* 805 * Restart the sequencer program from address zero 806 */ 807 static void ahc_restart(struct ahc_softc * ahc)808 ahc_restart(struct ahc_softc *ahc) 809 { 810 uint8_t sblkctl; 811 812 ahc_pause(ahc); 813 814 /* No more pending messages. */ 815 ahc_clear_msg_state(ahc); 816 817 ahc_outb(ahc, SCSISIGO, 0); /* De-assert BSY */ 818 ahc_outb(ahc, MSG_OUT, NOP); /* No message to send */ 819 ahc_outb(ahc, SXFRCTL1, ahc_inb(ahc, SXFRCTL1) & ~BITBUCKET); 820 ahc_outb(ahc, LASTPHASE, P_BUSFREE); 821 ahc_outb(ahc, SAVED_SCSIID, 0xFF); 822 ahc_outb(ahc, SAVED_LUN, 0xFF); 823 824 /* 825 * Ensure that the sequencer's idea of TQINPOS 826 * matches our own. The sequencer increments TQINPOS 827 * only after it sees a DMA complete and a reset could 828 * occur before the increment leaving the kernel to believe 829 * the command arrived but the sequencer to not. 830 */ 831 ahc_outb(ahc, TQINPOS, ahc->tqinfifonext); 832 833 /* Always allow reselection */ 834 ahc_outb(ahc, SCSISEQ, 835 ahc_inb(ahc, SCSISEQ_TEMPLATE) & (ENSELI|ENRSELI|ENAUTOATNP)); 836 if ((ahc->features & AHC_CMD_CHAN) != 0) { 837 /* Ensure that no DMA operations are in progress */ 838 ahc_outb(ahc, CCSCBCNT, 0); 839 ahc_outb(ahc, CCSGCTL, 0); 840 ahc_outb(ahc, CCSCBCTL, 0); 841 } 842 /* 843 * If we were in the process of DMA'ing SCB data into 844 * an SCB, replace that SCB on the free list. This prevents 845 * an SCB leak. 846 */ 847 if ((ahc_inb(ahc, SEQ_FLAGS2) & SCB_DMA) != 0) { 848 ahc_add_curscb_to_free_list(ahc); 849 ahc_outb(ahc, SEQ_FLAGS2, 850 ahc_inb(ahc, SEQ_FLAGS2) & ~SCB_DMA); 851 } 852 853 /* 854 * Clear any pending sequencer interrupt. It is no 855 * longer relevant since we're resetting the Program 856 * Counter. 857 */ 858 ahc_outb(ahc, CLRINT, CLRSEQINT); 859 860 ahc_outb(ahc, MWI_RESIDUAL, 0); 861 ahc_outb(ahc, SEQCTL, ahc->seqctl); 862 ahc_outb(ahc, SEQADDR0, 0); 863 ahc_outb(ahc, SEQADDR1, 0); 864 865 /* 866 * Take the LED out of diagnostic mode on PM resume, too 867 */ 868 sblkctl = ahc_inb(ahc, SBLKCTL); 869 ahc_outb(ahc, SBLKCTL, (sblkctl & ~(DIAGLEDEN|DIAGLEDON))); 870 871 ahc_unpause(ahc); 872 } 873 874 /************************* Input/Output Queues ********************************/ 875 static void ahc_run_qoutfifo(struct ahc_softc * ahc)876 ahc_run_qoutfifo(struct ahc_softc *ahc) 877 { 878 struct scb *scb; 879 u_int scb_index; 880 881 ahc_sync_qoutfifo(ahc, BUS_DMASYNC_POSTREAD); 882 while (ahc->qoutfifo[ahc->qoutfifonext] != SCB_LIST_NULL) { 883 884 scb_index = ahc->qoutfifo[ahc->qoutfifonext]; 885 if ((ahc->qoutfifonext & 0x03) == 0x03) { 886 u_int modnext; 887 888 /* 889 * Clear 32bits of QOUTFIFO at a time 890 * so that we don't clobber an incoming 891 * byte DMA to the array on architectures 892 * that only support 32bit load and store 893 * operations. 894 */ 895 modnext = ahc->qoutfifonext & ~0x3; 896 *((uint32_t *)(&ahc->qoutfifo[modnext])) = 0xFFFFFFFFUL; 897 ahc_dmamap_sync(ahc, ahc->shared_data_dmat, 898 ahc->shared_data_dmamap, 899 /*offset*/modnext, /*len*/4, 900 BUS_DMASYNC_PREREAD); 901 } 902 ahc->qoutfifonext++; 903 904 scb = ahc_lookup_scb(ahc, scb_index); 905 if (scb == NULL) { 906 printk("%s: WARNING no command for scb %d " 907 "(cmdcmplt)\nQOUTPOS = %d\n", 908 ahc_name(ahc), scb_index, 909 (ahc->qoutfifonext - 1) & 0xFF); 910 continue; 911 } 912 913 /* 914 * Save off the residual 915 * if there is one. 916 */ 917 ahc_update_residual(ahc, scb); 918 ahc_done(ahc, scb); 919 } 920 } 921 922 static void ahc_run_untagged_queues(struct ahc_softc * ahc)923 ahc_run_untagged_queues(struct ahc_softc *ahc) 924 { 925 int i; 926 927 for (i = 0; i < 16; i++) 928 ahc_run_untagged_queue(ahc, &ahc->untagged_queues[i]); 929 } 930 931 static void ahc_run_untagged_queue(struct ahc_softc * ahc,struct scb_tailq * queue)932 ahc_run_untagged_queue(struct ahc_softc *ahc, struct scb_tailq *queue) 933 { 934 struct scb *scb; 935 936 if (ahc->untagged_queue_lock != 0) 937 return; 938 939 if ((scb = TAILQ_FIRST(queue)) != NULL 940 && (scb->flags & SCB_ACTIVE) == 0) { 941 scb->flags |= SCB_ACTIVE; 942 ahc_queue_scb(ahc, scb); 943 } 944 } 945 946 /************************* Interrupt Handling *********************************/ 947 static void ahc_handle_brkadrint(struct ahc_softc * ahc)948 ahc_handle_brkadrint(struct ahc_softc *ahc) 949 { 950 /* 951 * We upset the sequencer :-( 952 * Lookup the error message 953 */ 954 int i; 955 int error; 956 957 error = ahc_inb(ahc, ERROR); 958 for (i = 0; error != 1 && i < num_errors; i++) 959 error >>= 1; 960 printk("%s: brkadrint, %s at seqaddr = 0x%x\n", 961 ahc_name(ahc), ahc_hard_errors[i].errmesg, 962 ahc_inb(ahc, SEQADDR0) | 963 (ahc_inb(ahc, SEQADDR1) << 8)); 964 965 ahc_dump_card_state(ahc); 966 967 /* Tell everyone that this HBA is no longer available */ 968 ahc_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, 969 CAM_LUN_WILDCARD, SCB_LIST_NULL, ROLE_UNKNOWN, 970 CAM_NO_HBA); 971 972 /* Disable all interrupt sources by resetting the controller */ 973 ahc_shutdown(ahc); 974 } 975 976 static void ahc_handle_seqint(struct ahc_softc * ahc,u_int intstat)977 ahc_handle_seqint(struct ahc_softc *ahc, u_int intstat) 978 { 979 struct scb *scb; 980 struct ahc_devinfo devinfo; 981 982 ahc_fetch_devinfo(ahc, &devinfo); 983 984 /* 985 * Clear the upper byte that holds SEQINT status 986 * codes and clear the SEQINT bit. We will unpause 987 * the sequencer, if appropriate, after servicing 988 * the request. 989 */ 990 ahc_outb(ahc, CLRINT, CLRSEQINT); 991 switch (intstat & SEQINT_MASK) { 992 case BAD_STATUS: 993 { 994 u_int scb_index; 995 struct hardware_scb *hscb; 996 997 /* 998 * Set the default return value to 0 (don't 999 * send sense). The sense code will change 1000 * this if needed. 1001 */ 1002 ahc_outb(ahc, RETURN_1, 0); 1003 1004 /* 1005 * The sequencer will notify us when a command 1006 * has an error that would be of interest to 1007 * the kernel. This allows us to leave the sequencer 1008 * running in the common case of command completes 1009 * without error. The sequencer will already have 1010 * dma'd the SCB back up to us, so we can reference 1011 * the in kernel copy directly. 1012 */ 1013 scb_index = ahc_inb(ahc, SCB_TAG); 1014 scb = ahc_lookup_scb(ahc, scb_index); 1015 if (scb == NULL) { 1016 ahc_print_devinfo(ahc, &devinfo); 1017 printk("ahc_intr - referenced scb " 1018 "not valid during seqint 0x%x scb(%d)\n", 1019 intstat, scb_index); 1020 ahc_dump_card_state(ahc); 1021 panic("for safety"); 1022 goto unpause; 1023 } 1024 1025 hscb = scb->hscb; 1026 1027 /* Don't want to clobber the original sense code */ 1028 if ((scb->flags & SCB_SENSE) != 0) { 1029 /* 1030 * Clear the SCB_SENSE Flag and have 1031 * the sequencer do a normal command 1032 * complete. 1033 */ 1034 scb->flags &= ~SCB_SENSE; 1035 ahc_set_transaction_status(scb, CAM_AUTOSENSE_FAIL); 1036 break; 1037 } 1038 ahc_set_transaction_status(scb, CAM_SCSI_STATUS_ERROR); 1039 /* Freeze the queue until the client sees the error. */ 1040 ahc_freeze_devq(ahc, scb); 1041 ahc_freeze_scb(scb); 1042 ahc_set_scsi_status(scb, hscb->shared_data.status.scsi_status); 1043 switch (hscb->shared_data.status.scsi_status) { 1044 case SAM_STAT_GOOD: 1045 printk("%s: Interrupted for status of 0???\n", 1046 ahc_name(ahc)); 1047 break; 1048 case SAM_STAT_COMMAND_TERMINATED: 1049 case SAM_STAT_CHECK_CONDITION: 1050 { 1051 struct ahc_dma_seg *sg; 1052 struct scsi_sense *sc; 1053 struct ahc_initiator_tinfo *targ_info; 1054 struct ahc_tmode_tstate *tstate; 1055 struct ahc_transinfo *tinfo; 1056 #ifdef AHC_DEBUG 1057 if (ahc_debug & AHC_SHOW_SENSE) { 1058 ahc_print_path(ahc, scb); 1059 printk("SCB %d: requests Check Status\n", 1060 scb->hscb->tag); 1061 } 1062 #endif 1063 1064 if (ahc_perform_autosense(scb) == 0) 1065 break; 1066 1067 targ_info = ahc_fetch_transinfo(ahc, 1068 devinfo.channel, 1069 devinfo.our_scsiid, 1070 devinfo.target, 1071 &tstate); 1072 tinfo = &targ_info->curr; 1073 sg = scb->sg_list; 1074 sc = (struct scsi_sense *)(&hscb->shared_data.cdb); 1075 /* 1076 * Save off the residual if there is one. 1077 */ 1078 ahc_update_residual(ahc, scb); 1079 #ifdef AHC_DEBUG 1080 if (ahc_debug & AHC_SHOW_SENSE) { 1081 ahc_print_path(ahc, scb); 1082 printk("Sending Sense\n"); 1083 } 1084 #endif 1085 sg->addr = ahc_get_sense_bufaddr(ahc, scb); 1086 sg->len = ahc_get_sense_bufsize(ahc, scb); 1087 sg->len |= AHC_DMA_LAST_SEG; 1088 1089 /* Fixup byte order */ 1090 sg->addr = ahc_htole32(sg->addr); 1091 sg->len = ahc_htole32(sg->len); 1092 1093 sc->opcode = REQUEST_SENSE; 1094 sc->byte2 = 0; 1095 if (tinfo->protocol_version <= SCSI_REV_2 1096 && SCB_GET_LUN(scb) < 8) 1097 sc->byte2 = SCB_GET_LUN(scb) << 5; 1098 sc->unused[0] = 0; 1099 sc->unused[1] = 0; 1100 sc->length = sg->len; 1101 sc->control = 0; 1102 1103 /* 1104 * We can't allow the target to disconnect. 1105 * This will be an untagged transaction and 1106 * having the target disconnect will make this 1107 * transaction indestinguishable from outstanding 1108 * tagged transactions. 1109 */ 1110 hscb->control = 0; 1111 1112 /* 1113 * This request sense could be because the 1114 * the device lost power or in some other 1115 * way has lost our transfer negotiations. 1116 * Renegotiate if appropriate. Unit attention 1117 * errors will be reported before any data 1118 * phases occur. 1119 */ 1120 if (ahc_get_residual(scb) 1121 == ahc_get_transfer_length(scb)) { 1122 ahc_update_neg_request(ahc, &devinfo, 1123 tstate, targ_info, 1124 AHC_NEG_IF_NON_ASYNC); 1125 } 1126 if (tstate->auto_negotiate & devinfo.target_mask) { 1127 hscb->control |= MK_MESSAGE; 1128 scb->flags &= ~SCB_NEGOTIATE; 1129 scb->flags |= SCB_AUTO_NEGOTIATE; 1130 } 1131 hscb->cdb_len = sizeof(*sc); 1132 hscb->dataptr = sg->addr; 1133 hscb->datacnt = sg->len; 1134 hscb->sgptr = scb->sg_list_phys | SG_FULL_RESID; 1135 hscb->sgptr = ahc_htole32(hscb->sgptr); 1136 scb->sg_count = 1; 1137 scb->flags |= SCB_SENSE; 1138 ahc_qinfifo_requeue_tail(ahc, scb); 1139 ahc_outb(ahc, RETURN_1, SEND_SENSE); 1140 /* 1141 * Ensure we have enough time to actually 1142 * retrieve the sense. 1143 */ 1144 ahc_scb_timer_reset(scb, 5 * 1000000); 1145 break; 1146 } 1147 default: 1148 break; 1149 } 1150 break; 1151 } 1152 case NO_MATCH: 1153 { 1154 /* Ensure we don't leave the selection hardware on */ 1155 ahc_outb(ahc, SCSISEQ, 1156 ahc_inb(ahc, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP)); 1157 1158 printk("%s:%c:%d: no active SCB for reconnecting " 1159 "target - issuing BUS DEVICE RESET\n", 1160 ahc_name(ahc), devinfo.channel, devinfo.target); 1161 printk("SAVED_SCSIID == 0x%x, SAVED_LUN == 0x%x, " 1162 "ARG_1 == 0x%x ACCUM = 0x%x\n", 1163 ahc_inb(ahc, SAVED_SCSIID), ahc_inb(ahc, SAVED_LUN), 1164 ahc_inb(ahc, ARG_1), ahc_inb(ahc, ACCUM)); 1165 printk("SEQ_FLAGS == 0x%x, SCBPTR == 0x%x, BTT == 0x%x, " 1166 "SINDEX == 0x%x\n", 1167 ahc_inb(ahc, SEQ_FLAGS), ahc_inb(ahc, SCBPTR), 1168 ahc_index_busy_tcl(ahc, 1169 BUILD_TCL(ahc_inb(ahc, SAVED_SCSIID), 1170 ahc_inb(ahc, SAVED_LUN))), 1171 ahc_inb(ahc, SINDEX)); 1172 printk("SCSIID == 0x%x, SCB_SCSIID == 0x%x, SCB_LUN == 0x%x, " 1173 "SCB_TAG == 0x%x, SCB_CONTROL == 0x%x\n", 1174 ahc_inb(ahc, SCSIID), ahc_inb(ahc, SCB_SCSIID), 1175 ahc_inb(ahc, SCB_LUN), ahc_inb(ahc, SCB_TAG), 1176 ahc_inb(ahc, SCB_CONTROL)); 1177 printk("SCSIBUSL == 0x%x, SCSISIGI == 0x%x\n", 1178 ahc_inb(ahc, SCSIBUSL), ahc_inb(ahc, SCSISIGI)); 1179 printk("SXFRCTL0 == 0x%x\n", ahc_inb(ahc, SXFRCTL0)); 1180 printk("SEQCTL == 0x%x\n", ahc_inb(ahc, SEQCTL)); 1181 ahc_dump_card_state(ahc); 1182 ahc->msgout_buf[0] = TARGET_RESET; 1183 ahc->msgout_len = 1; 1184 ahc->msgout_index = 0; 1185 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT; 1186 ahc_outb(ahc, MSG_OUT, HOST_MSG); 1187 ahc_assert_atn(ahc); 1188 break; 1189 } 1190 case SEND_REJECT: 1191 { 1192 u_int rejbyte = ahc_inb(ahc, ACCUM); 1193 printk("%s:%c:%d: Warning - unknown message received from " 1194 "target (0x%x). Rejecting\n", 1195 ahc_name(ahc), devinfo.channel, devinfo.target, rejbyte); 1196 break; 1197 } 1198 case PROTO_VIOLATION: 1199 { 1200 ahc_handle_proto_violation(ahc); 1201 break; 1202 } 1203 case IGN_WIDE_RES: 1204 ahc_handle_ign_wide_residue(ahc, &devinfo); 1205 break; 1206 case PDATA_REINIT: 1207 ahc_reinitialize_dataptrs(ahc); 1208 break; 1209 case BAD_PHASE: 1210 { 1211 u_int lastphase; 1212 1213 lastphase = ahc_inb(ahc, LASTPHASE); 1214 printk("%s:%c:%d: unknown scsi bus phase %x, " 1215 "lastphase = 0x%x. Attempting to continue\n", 1216 ahc_name(ahc), devinfo.channel, devinfo.target, 1217 lastphase, ahc_inb(ahc, SCSISIGI)); 1218 break; 1219 } 1220 case MISSED_BUSFREE: 1221 { 1222 u_int lastphase; 1223 1224 lastphase = ahc_inb(ahc, LASTPHASE); 1225 printk("%s:%c:%d: Missed busfree. " 1226 "Lastphase = 0x%x, Curphase = 0x%x\n", 1227 ahc_name(ahc), devinfo.channel, devinfo.target, 1228 lastphase, ahc_inb(ahc, SCSISIGI)); 1229 ahc_restart(ahc); 1230 return; 1231 } 1232 case HOST_MSG_LOOP: 1233 { 1234 /* 1235 * The sequencer has encountered a message phase 1236 * that requires host assistance for completion. 1237 * While handling the message phase(s), we will be 1238 * notified by the sequencer after each byte is 1239 * transferred so we can track bus phase changes. 1240 * 1241 * If this is the first time we've seen a HOST_MSG_LOOP 1242 * interrupt, initialize the state of the host message 1243 * loop. 1244 */ 1245 if (ahc->msg_type == MSG_TYPE_NONE) { 1246 struct scb *scb; 1247 u_int scb_index; 1248 u_int bus_phase; 1249 1250 bus_phase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK; 1251 if (bus_phase != P_MESGIN 1252 && bus_phase != P_MESGOUT) { 1253 printk("ahc_intr: HOST_MSG_LOOP bad " 1254 "phase 0x%x\n", 1255 bus_phase); 1256 /* 1257 * Probably transitioned to bus free before 1258 * we got here. Just punt the message. 1259 */ 1260 ahc_clear_intstat(ahc); 1261 ahc_restart(ahc); 1262 return; 1263 } 1264 1265 scb_index = ahc_inb(ahc, SCB_TAG); 1266 scb = ahc_lookup_scb(ahc, scb_index); 1267 if (devinfo.role == ROLE_INITIATOR) { 1268 if (bus_phase == P_MESGOUT) { 1269 if (scb == NULL) 1270 panic("HOST_MSG_LOOP with " 1271 "invalid SCB %x\n", 1272 scb_index); 1273 1274 ahc_setup_initiator_msgout(ahc, 1275 &devinfo, 1276 scb); 1277 } else { 1278 ahc->msg_type = 1279 MSG_TYPE_INITIATOR_MSGIN; 1280 ahc->msgin_index = 0; 1281 } 1282 } 1283 #ifdef AHC_TARGET_MODE 1284 else { 1285 if (bus_phase == P_MESGOUT) { 1286 ahc->msg_type = 1287 MSG_TYPE_TARGET_MSGOUT; 1288 ahc->msgin_index = 0; 1289 } else 1290 ahc_setup_target_msgin(ahc, 1291 &devinfo, 1292 scb); 1293 } 1294 #endif 1295 } 1296 1297 ahc_handle_message_phase(ahc); 1298 break; 1299 } 1300 case PERR_DETECTED: 1301 { 1302 /* 1303 * If we've cleared the parity error interrupt 1304 * but the sequencer still believes that SCSIPERR 1305 * is true, it must be that the parity error is 1306 * for the currently presented byte on the bus, 1307 * and we are not in a phase (data-in) where we will 1308 * eventually ack this byte. Ack the byte and 1309 * throw it away in the hope that the target will 1310 * take us to message out to deliver the appropriate 1311 * error message. 1312 */ 1313 if ((intstat & SCSIINT) == 0 1314 && (ahc_inb(ahc, SSTAT1) & SCSIPERR) != 0) { 1315 1316 if ((ahc->features & AHC_DT) == 0) { 1317 u_int curphase; 1318 1319 /* 1320 * The hardware will only let you ack bytes 1321 * if the expected phase in SCSISIGO matches 1322 * the current phase. Make sure this is 1323 * currently the case. 1324 */ 1325 curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK; 1326 ahc_outb(ahc, LASTPHASE, curphase); 1327 ahc_outb(ahc, SCSISIGO, curphase); 1328 } 1329 if ((ahc_inb(ahc, SCSISIGI) & (CDI|MSGI)) == 0) { 1330 int wait; 1331 1332 /* 1333 * In a data phase. Faster to bitbucket 1334 * the data than to individually ack each 1335 * byte. This is also the only strategy 1336 * that will work with AUTOACK enabled. 1337 */ 1338 ahc_outb(ahc, SXFRCTL1, 1339 ahc_inb(ahc, SXFRCTL1) | BITBUCKET); 1340 wait = 5000; 1341 while (--wait != 0) { 1342 if ((ahc_inb(ahc, SCSISIGI) 1343 & (CDI|MSGI)) != 0) 1344 break; 1345 ahc_delay(100); 1346 } 1347 ahc_outb(ahc, SXFRCTL1, 1348 ahc_inb(ahc, SXFRCTL1) & ~BITBUCKET); 1349 if (wait == 0) { 1350 struct scb *scb; 1351 u_int scb_index; 1352 1353 ahc_print_devinfo(ahc, &devinfo); 1354 printk("Unable to clear parity error. " 1355 "Resetting bus.\n"); 1356 scb_index = ahc_inb(ahc, SCB_TAG); 1357 scb = ahc_lookup_scb(ahc, scb_index); 1358 if (scb != NULL) 1359 ahc_set_transaction_status(scb, 1360 CAM_UNCOR_PARITY); 1361 ahc_reset_channel(ahc, devinfo.channel, 1362 /*init reset*/TRUE); 1363 } 1364 } else { 1365 ahc_inb(ahc, SCSIDATL); 1366 } 1367 } 1368 break; 1369 } 1370 case DATA_OVERRUN: 1371 { 1372 /* 1373 * When the sequencer detects an overrun, it 1374 * places the controller in "BITBUCKET" mode 1375 * and allows the target to complete its transfer. 1376 * Unfortunately, none of the counters get updated 1377 * when the controller is in this mode, so we have 1378 * no way of knowing how large the overrun was. 1379 */ 1380 u_int scbindex = ahc_inb(ahc, SCB_TAG); 1381 u_int lastphase = ahc_inb(ahc, LASTPHASE); 1382 u_int i; 1383 1384 scb = ahc_lookup_scb(ahc, scbindex); 1385 for (i = 0; i < num_phases; i++) { 1386 if (lastphase == ahc_phase_table[i].phase) 1387 break; 1388 } 1389 ahc_print_path(ahc, scb); 1390 printk("data overrun detected %s." 1391 " Tag == 0x%x.\n", 1392 ahc_phase_table[i].phasemsg, 1393 scb->hscb->tag); 1394 ahc_print_path(ahc, scb); 1395 printk("%s seen Data Phase. Length = %ld. NumSGs = %d.\n", 1396 ahc_inb(ahc, SEQ_FLAGS) & DPHASE ? "Have" : "Haven't", 1397 ahc_get_transfer_length(scb), scb->sg_count); 1398 if (scb->sg_count > 0) { 1399 for (i = 0; i < scb->sg_count; i++) { 1400 1401 printk("sg[%d] - Addr 0x%x%x : Length %d\n", 1402 i, 1403 (ahc_le32toh(scb->sg_list[i].len) >> 24 1404 & SG_HIGH_ADDR_BITS), 1405 ahc_le32toh(scb->sg_list[i].addr), 1406 ahc_le32toh(scb->sg_list[i].len) 1407 & AHC_SG_LEN_MASK); 1408 } 1409 } 1410 /* 1411 * Set this and it will take effect when the 1412 * target does a command complete. 1413 */ 1414 ahc_freeze_devq(ahc, scb); 1415 if ((scb->flags & SCB_SENSE) == 0) { 1416 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1417 } else { 1418 scb->flags &= ~SCB_SENSE; 1419 ahc_set_transaction_status(scb, CAM_AUTOSENSE_FAIL); 1420 } 1421 ahc_freeze_scb(scb); 1422 1423 if ((ahc->features & AHC_ULTRA2) != 0) { 1424 /* 1425 * Clear the channel in case we return 1426 * to data phase later. 1427 */ 1428 ahc_outb(ahc, SXFRCTL0, 1429 ahc_inb(ahc, SXFRCTL0) | CLRSTCNT|CLRCHN); 1430 ahc_outb(ahc, SXFRCTL0, 1431 ahc_inb(ahc, SXFRCTL0) | CLRSTCNT|CLRCHN); 1432 } 1433 if ((ahc->flags & AHC_39BIT_ADDRESSING) != 0) { 1434 u_int dscommand1; 1435 1436 /* Ensure HHADDR is 0 for future DMA operations. */ 1437 dscommand1 = ahc_inb(ahc, DSCOMMAND1); 1438 ahc_outb(ahc, DSCOMMAND1, dscommand1 | HADDLDSEL0); 1439 ahc_outb(ahc, HADDR, 0); 1440 ahc_outb(ahc, DSCOMMAND1, dscommand1); 1441 } 1442 break; 1443 } 1444 case MKMSG_FAILED: 1445 { 1446 u_int scbindex; 1447 1448 printk("%s:%c:%d:%d: Attempt to issue message failed\n", 1449 ahc_name(ahc), devinfo.channel, devinfo.target, 1450 devinfo.lun); 1451 scbindex = ahc_inb(ahc, SCB_TAG); 1452 scb = ahc_lookup_scb(ahc, scbindex); 1453 if (scb != NULL 1454 && (scb->flags & SCB_RECOVERY_SCB) != 0) 1455 /* 1456 * Ensure that we didn't put a second instance of this 1457 * SCB into the QINFIFO. 1458 */ 1459 ahc_search_qinfifo(ahc, SCB_GET_TARGET(ahc, scb), 1460 SCB_GET_CHANNEL(ahc, scb), 1461 SCB_GET_LUN(scb), scb->hscb->tag, 1462 ROLE_INITIATOR, /*status*/0, 1463 SEARCH_REMOVE); 1464 break; 1465 } 1466 case NO_FREE_SCB: 1467 { 1468 printk("%s: No free or disconnected SCBs\n", ahc_name(ahc)); 1469 ahc_dump_card_state(ahc); 1470 panic("for safety"); 1471 break; 1472 } 1473 case SCB_MISMATCH: 1474 { 1475 u_int scbptr; 1476 1477 scbptr = ahc_inb(ahc, SCBPTR); 1478 printk("Bogus TAG after DMA. SCBPTR %d, tag %d, our tag %d\n", 1479 scbptr, ahc_inb(ahc, ARG_1), 1480 ahc->scb_data->hscbs[scbptr].tag); 1481 ahc_dump_card_state(ahc); 1482 panic("for safety"); 1483 break; 1484 } 1485 case OUT_OF_RANGE: 1486 { 1487 printk("%s: BTT calculation out of range\n", ahc_name(ahc)); 1488 printk("SAVED_SCSIID == 0x%x, SAVED_LUN == 0x%x, " 1489 "ARG_1 == 0x%x ACCUM = 0x%x\n", 1490 ahc_inb(ahc, SAVED_SCSIID), ahc_inb(ahc, SAVED_LUN), 1491 ahc_inb(ahc, ARG_1), ahc_inb(ahc, ACCUM)); 1492 printk("SEQ_FLAGS == 0x%x, SCBPTR == 0x%x, BTT == 0x%x, " 1493 "SINDEX == 0x%x\n, A == 0x%x\n", 1494 ahc_inb(ahc, SEQ_FLAGS), ahc_inb(ahc, SCBPTR), 1495 ahc_index_busy_tcl(ahc, 1496 BUILD_TCL(ahc_inb(ahc, SAVED_SCSIID), 1497 ahc_inb(ahc, SAVED_LUN))), 1498 ahc_inb(ahc, SINDEX), 1499 ahc_inb(ahc, ACCUM)); 1500 printk("SCSIID == 0x%x, SCB_SCSIID == 0x%x, SCB_LUN == 0x%x, " 1501 "SCB_TAG == 0x%x, SCB_CONTROL == 0x%x\n", 1502 ahc_inb(ahc, SCSIID), ahc_inb(ahc, SCB_SCSIID), 1503 ahc_inb(ahc, SCB_LUN), ahc_inb(ahc, SCB_TAG), 1504 ahc_inb(ahc, SCB_CONTROL)); 1505 printk("SCSIBUSL == 0x%x, SCSISIGI == 0x%x\n", 1506 ahc_inb(ahc, SCSIBUSL), ahc_inb(ahc, SCSISIGI)); 1507 ahc_dump_card_state(ahc); 1508 panic("for safety"); 1509 break; 1510 } 1511 default: 1512 printk("ahc_intr: seqint, " 1513 "intstat == 0x%x, scsisigi = 0x%x\n", 1514 intstat, ahc_inb(ahc, SCSISIGI)); 1515 break; 1516 } 1517 unpause: 1518 /* 1519 * The sequencer is paused immediately on 1520 * a SEQINT, so we should restart it when 1521 * we're done. 1522 */ 1523 ahc_unpause(ahc); 1524 } 1525 1526 static void ahc_handle_scsiint(struct ahc_softc * ahc,u_int intstat)1527 ahc_handle_scsiint(struct ahc_softc *ahc, u_int intstat) 1528 { 1529 u_int scb_index; 1530 u_int status0; 1531 u_int status; 1532 struct scb *scb; 1533 char cur_channel; 1534 char intr_channel; 1535 1536 if ((ahc->features & AHC_TWIN) != 0 1537 && ((ahc_inb(ahc, SBLKCTL) & SELBUSB) != 0)) 1538 cur_channel = 'B'; 1539 else 1540 cur_channel = 'A'; 1541 intr_channel = cur_channel; 1542 1543 if ((ahc->features & AHC_ULTRA2) != 0) 1544 status0 = ahc_inb(ahc, SSTAT0) & IOERR; 1545 else 1546 status0 = 0; 1547 status = ahc_inb(ahc, SSTAT1) & (SELTO|SCSIRSTI|BUSFREE|SCSIPERR); 1548 if (status == 0 && status0 == 0) { 1549 if ((ahc->features & AHC_TWIN) != 0) { 1550 /* Try the other channel */ 1551 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) ^ SELBUSB); 1552 status = ahc_inb(ahc, SSTAT1) 1553 & (SELTO|SCSIRSTI|BUSFREE|SCSIPERR); 1554 intr_channel = (cur_channel == 'A') ? 'B' : 'A'; 1555 } 1556 if (status == 0) { 1557 printk("%s: Spurious SCSI interrupt\n", ahc_name(ahc)); 1558 ahc_outb(ahc, CLRINT, CLRSCSIINT); 1559 ahc_unpause(ahc); 1560 return; 1561 } 1562 } 1563 1564 /* Make sure the sequencer is in a safe location. */ 1565 ahc_clear_critical_section(ahc); 1566 1567 scb_index = ahc_inb(ahc, SCB_TAG); 1568 scb = ahc_lookup_scb(ahc, scb_index); 1569 if (scb != NULL 1570 && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) != 0) 1571 scb = NULL; 1572 1573 if ((ahc->features & AHC_ULTRA2) != 0 1574 && (status0 & IOERR) != 0) { 1575 int now_lvd; 1576 1577 now_lvd = ahc_inb(ahc, SBLKCTL) & ENAB40; 1578 printk("%s: Transceiver State Has Changed to %s mode\n", 1579 ahc_name(ahc), now_lvd ? "LVD" : "SE"); 1580 ahc_outb(ahc, CLRSINT0, CLRIOERR); 1581 /* 1582 * When transitioning to SE mode, the reset line 1583 * glitches, triggering an arbitration bug in some 1584 * Ultra2 controllers. This bug is cleared when we 1585 * assert the reset line. Since a reset glitch has 1586 * already occurred with this transition and a 1587 * transceiver state change is handled just like 1588 * a bus reset anyway, asserting the reset line 1589 * ourselves is safe. 1590 */ 1591 ahc_reset_channel(ahc, intr_channel, 1592 /*Initiate Reset*/now_lvd == 0); 1593 } else if ((status & SCSIRSTI) != 0) { 1594 printk("%s: Someone reset channel %c\n", 1595 ahc_name(ahc), intr_channel); 1596 if (intr_channel != cur_channel) 1597 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) ^ SELBUSB); 1598 ahc_reset_channel(ahc, intr_channel, /*Initiate Reset*/FALSE); 1599 } else if ((status & SCSIPERR) != 0) { 1600 /* 1601 * Determine the bus phase and queue an appropriate message. 1602 * SCSIPERR is latched true as soon as a parity error 1603 * occurs. If the sequencer acked the transfer that 1604 * caused the parity error and the currently presented 1605 * transfer on the bus has correct parity, SCSIPERR will 1606 * be cleared by CLRSCSIPERR. Use this to determine if 1607 * we should look at the last phase the sequencer recorded, 1608 * or the current phase presented on the bus. 1609 */ 1610 struct ahc_devinfo devinfo; 1611 u_int mesg_out; 1612 u_int curphase; 1613 u_int errorphase; 1614 u_int lastphase; 1615 u_int scsirate; 1616 u_int i; 1617 u_int sstat2; 1618 int silent; 1619 1620 lastphase = ahc_inb(ahc, LASTPHASE); 1621 curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK; 1622 sstat2 = ahc_inb(ahc, SSTAT2); 1623 ahc_outb(ahc, CLRSINT1, CLRSCSIPERR); 1624 /* 1625 * For all phases save DATA, the sequencer won't 1626 * automatically ack a byte that has a parity error 1627 * in it. So the only way that the current phase 1628 * could be 'data-in' is if the parity error is for 1629 * an already acked byte in the data phase. During 1630 * synchronous data-in transfers, we may actually 1631 * ack bytes before latching the current phase in 1632 * LASTPHASE, leading to the discrepancy between 1633 * curphase and lastphase. 1634 */ 1635 if ((ahc_inb(ahc, SSTAT1) & SCSIPERR) != 0 1636 || curphase == P_DATAIN || curphase == P_DATAIN_DT) 1637 errorphase = curphase; 1638 else 1639 errorphase = lastphase; 1640 1641 for (i = 0; i < num_phases; i++) { 1642 if (errorphase == ahc_phase_table[i].phase) 1643 break; 1644 } 1645 mesg_out = ahc_phase_table[i].mesg_out; 1646 silent = FALSE; 1647 if (scb != NULL) { 1648 if (SCB_IS_SILENT(scb)) 1649 silent = TRUE; 1650 else 1651 ahc_print_path(ahc, scb); 1652 scb->flags |= SCB_TRANSMISSION_ERROR; 1653 } else 1654 printk("%s:%c:%d: ", ahc_name(ahc), intr_channel, 1655 SCSIID_TARGET(ahc, ahc_inb(ahc, SAVED_SCSIID))); 1656 scsirate = ahc_inb(ahc, SCSIRATE); 1657 if (silent == FALSE) { 1658 printk("parity error detected %s. " 1659 "SEQADDR(0x%x) SCSIRATE(0x%x)\n", 1660 ahc_phase_table[i].phasemsg, 1661 ahc_inw(ahc, SEQADDR0), 1662 scsirate); 1663 if ((ahc->features & AHC_DT) != 0) { 1664 if ((sstat2 & CRCVALERR) != 0) 1665 printk("\tCRC Value Mismatch\n"); 1666 if ((sstat2 & CRCENDERR) != 0) 1667 printk("\tNo terminal CRC packet " 1668 "received\n"); 1669 if ((sstat2 & CRCREQERR) != 0) 1670 printk("\tIllegal CRC packet " 1671 "request\n"); 1672 if ((sstat2 & DUAL_EDGE_ERR) != 0) 1673 printk("\tUnexpected %sDT Data Phase\n", 1674 (scsirate & SINGLE_EDGE) 1675 ? "" : "non-"); 1676 } 1677 } 1678 1679 if ((ahc->features & AHC_DT) != 0 1680 && (sstat2 & DUAL_EDGE_ERR) != 0) { 1681 /* 1682 * This error applies regardless of 1683 * data direction, so ignore the value 1684 * in the phase table. 1685 */ 1686 mesg_out = INITIATOR_ERROR; 1687 } 1688 1689 /* 1690 * We've set the hardware to assert ATN if we 1691 * get a parity error on "in" phases, so all we 1692 * need to do is stuff the message buffer with 1693 * the appropriate message. "In" phases have set 1694 * mesg_out to something other than MSG_NOP. 1695 */ 1696 if (mesg_out != NOP) { 1697 if (ahc->msg_type != MSG_TYPE_NONE) 1698 ahc->send_msg_perror = TRUE; 1699 else 1700 ahc_outb(ahc, MSG_OUT, mesg_out); 1701 } 1702 /* 1703 * Force a renegotiation with this target just in 1704 * case we are out of sync for some external reason 1705 * unknown (or unreported) by the target. 1706 */ 1707 ahc_fetch_devinfo(ahc, &devinfo); 1708 ahc_force_renegotiation(ahc, &devinfo); 1709 1710 ahc_outb(ahc, CLRINT, CLRSCSIINT); 1711 ahc_unpause(ahc); 1712 } else if ((status & SELTO) != 0) { 1713 u_int scbptr; 1714 1715 /* Stop the selection */ 1716 ahc_outb(ahc, SCSISEQ, 0); 1717 1718 /* No more pending messages */ 1719 ahc_clear_msg_state(ahc); 1720 1721 /* Clear interrupt state */ 1722 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE); 1723 ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRBUSFREE|CLRSCSIPERR); 1724 1725 /* 1726 * Although the driver does not care about the 1727 * 'Selection in Progress' status bit, the busy 1728 * LED does. SELINGO is only cleared by a successful 1729 * selection, so we must manually clear it to insure 1730 * the LED turns off just incase no future successful 1731 * selections occur (e.g. no devices on the bus). 1732 */ 1733 ahc_outb(ahc, CLRSINT0, CLRSELINGO); 1734 1735 scbptr = ahc_inb(ahc, WAITING_SCBH); 1736 ahc_outb(ahc, SCBPTR, scbptr); 1737 scb_index = ahc_inb(ahc, SCB_TAG); 1738 1739 scb = ahc_lookup_scb(ahc, scb_index); 1740 if (scb == NULL) { 1741 printk("%s: ahc_intr - referenced scb not " 1742 "valid during SELTO scb(%d, %d)\n", 1743 ahc_name(ahc), scbptr, scb_index); 1744 ahc_dump_card_state(ahc); 1745 } else { 1746 struct ahc_devinfo devinfo; 1747 #ifdef AHC_DEBUG 1748 if ((ahc_debug & AHC_SHOW_SELTO) != 0) { 1749 ahc_print_path(ahc, scb); 1750 printk("Saw Selection Timeout for SCB 0x%x\n", 1751 scb_index); 1752 } 1753 #endif 1754 ahc_scb_devinfo(ahc, &devinfo, scb); 1755 ahc_set_transaction_status(scb, CAM_SEL_TIMEOUT); 1756 ahc_freeze_devq(ahc, scb); 1757 1758 /* 1759 * Cancel any pending transactions on the device 1760 * now that it seems to be missing. This will 1761 * also revert us to async/narrow transfers until 1762 * we can renegotiate with the device. 1763 */ 1764 ahc_handle_devreset(ahc, &devinfo, 1765 CAM_SEL_TIMEOUT, 1766 "Selection Timeout", 1767 /*verbose_level*/1); 1768 } 1769 ahc_outb(ahc, CLRINT, CLRSCSIINT); 1770 ahc_restart(ahc); 1771 } else if ((status & BUSFREE) != 0 1772 && (ahc_inb(ahc, SIMODE1) & ENBUSFREE) != 0) { 1773 struct ahc_devinfo devinfo; 1774 u_int lastphase; 1775 u_int saved_scsiid; 1776 u_int saved_lun; 1777 u_int target; 1778 u_int initiator_role_id; 1779 char channel; 1780 int printerror; 1781 1782 /* 1783 * Clear our selection hardware as soon as possible. 1784 * We may have an entry in the waiting Q for this target, 1785 * that is affected by this busfree and we don't want to 1786 * go about selecting the target while we handle the event. 1787 */ 1788 ahc_outb(ahc, SCSISEQ, 1789 ahc_inb(ahc, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP)); 1790 1791 /* 1792 * Disable busfree interrupts and clear the busfree 1793 * interrupt status. We do this here so that several 1794 * bus transactions occur prior to clearing the SCSIINT 1795 * latch. It can take a bit for the clearing to take effect. 1796 */ 1797 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE); 1798 ahc_outb(ahc, CLRSINT1, CLRBUSFREE|CLRSCSIPERR); 1799 1800 /* 1801 * Look at what phase we were last in. 1802 * If its message out, chances are pretty good 1803 * that the busfree was in response to one of 1804 * our abort requests. 1805 */ 1806 lastphase = ahc_inb(ahc, LASTPHASE); 1807 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); 1808 saved_lun = ahc_inb(ahc, SAVED_LUN); 1809 target = SCSIID_TARGET(ahc, saved_scsiid); 1810 initiator_role_id = SCSIID_OUR_ID(saved_scsiid); 1811 channel = SCSIID_CHANNEL(ahc, saved_scsiid); 1812 ahc_compile_devinfo(&devinfo, initiator_role_id, 1813 target, saved_lun, channel, ROLE_INITIATOR); 1814 printerror = 1; 1815 1816 if (lastphase == P_MESGOUT) { 1817 u_int tag; 1818 1819 tag = SCB_LIST_NULL; 1820 if (ahc_sent_msg(ahc, AHCMSG_1B, ABORT_TASK, TRUE) 1821 || ahc_sent_msg(ahc, AHCMSG_1B, ABORT_TASK_SET, TRUE)) { 1822 if (ahc->msgout_buf[ahc->msgout_index - 1] 1823 == ABORT_TASK) 1824 tag = scb->hscb->tag; 1825 ahc_print_path(ahc, scb); 1826 printk("SCB %d - Abort%s Completed.\n", 1827 scb->hscb->tag, tag == SCB_LIST_NULL ? 1828 "" : " Tag"); 1829 ahc_abort_scbs(ahc, target, channel, 1830 saved_lun, tag, 1831 ROLE_INITIATOR, 1832 CAM_REQ_ABORTED); 1833 printerror = 0; 1834 } else if (ahc_sent_msg(ahc, AHCMSG_1B, 1835 TARGET_RESET, TRUE)) { 1836 ahc_compile_devinfo(&devinfo, 1837 initiator_role_id, 1838 target, 1839 CAM_LUN_WILDCARD, 1840 channel, 1841 ROLE_INITIATOR); 1842 ahc_handle_devreset(ahc, &devinfo, 1843 CAM_BDR_SENT, 1844 "Bus Device Reset", 1845 /*verbose_level*/0); 1846 printerror = 0; 1847 } else if (ahc_sent_msg(ahc, AHCMSG_EXT, 1848 EXTENDED_PPR, FALSE)) { 1849 struct ahc_initiator_tinfo *tinfo; 1850 struct ahc_tmode_tstate *tstate; 1851 1852 /* 1853 * PPR Rejected. Try non-ppr negotiation 1854 * and retry command. 1855 */ 1856 tinfo = ahc_fetch_transinfo(ahc, 1857 devinfo.channel, 1858 devinfo.our_scsiid, 1859 devinfo.target, 1860 &tstate); 1861 tinfo->curr.transport_version = 2; 1862 tinfo->goal.transport_version = 2; 1863 tinfo->goal.ppr_options = 0; 1864 ahc_qinfifo_requeue_tail(ahc, scb); 1865 printerror = 0; 1866 } else if (ahc_sent_msg(ahc, AHCMSG_EXT, 1867 EXTENDED_WDTR, FALSE)) { 1868 /* 1869 * Negotiation Rejected. Go-narrow and 1870 * retry command. 1871 */ 1872 ahc_set_width(ahc, &devinfo, 1873 MSG_EXT_WDTR_BUS_8_BIT, 1874 AHC_TRANS_CUR|AHC_TRANS_GOAL, 1875 /*paused*/TRUE); 1876 ahc_qinfifo_requeue_tail(ahc, scb); 1877 printerror = 0; 1878 } else if (ahc_sent_msg(ahc, AHCMSG_EXT, 1879 EXTENDED_SDTR, FALSE)) { 1880 /* 1881 * Negotiation Rejected. Go-async and 1882 * retry command. 1883 */ 1884 ahc_set_syncrate(ahc, &devinfo, 1885 /*syncrate*/NULL, 1886 /*period*/0, /*offset*/0, 1887 /*ppr_options*/0, 1888 AHC_TRANS_CUR|AHC_TRANS_GOAL, 1889 /*paused*/TRUE); 1890 ahc_qinfifo_requeue_tail(ahc, scb); 1891 printerror = 0; 1892 } 1893 } 1894 if (printerror != 0) { 1895 u_int i; 1896 1897 if (scb != NULL) { 1898 u_int tag; 1899 1900 if ((scb->hscb->control & TAG_ENB) != 0) 1901 tag = scb->hscb->tag; 1902 else 1903 tag = SCB_LIST_NULL; 1904 ahc_print_path(ahc, scb); 1905 ahc_abort_scbs(ahc, target, channel, 1906 SCB_GET_LUN(scb), tag, 1907 ROLE_INITIATOR, 1908 CAM_UNEXP_BUSFREE); 1909 } else { 1910 /* 1911 * We had not fully identified this connection, 1912 * so we cannot abort anything. 1913 */ 1914 printk("%s: ", ahc_name(ahc)); 1915 } 1916 for (i = 0; i < num_phases; i++) { 1917 if (lastphase == ahc_phase_table[i].phase) 1918 break; 1919 } 1920 if (lastphase != P_BUSFREE) { 1921 /* 1922 * Renegotiate with this device at the 1923 * next opportunity just in case this busfree 1924 * is due to a negotiation mismatch with the 1925 * device. 1926 */ 1927 ahc_force_renegotiation(ahc, &devinfo); 1928 } 1929 printk("Unexpected busfree %s\n" 1930 "SEQADDR == 0x%x\n", 1931 ahc_phase_table[i].phasemsg, 1932 ahc_inb(ahc, SEQADDR0) 1933 | (ahc_inb(ahc, SEQADDR1) << 8)); 1934 } 1935 ahc_outb(ahc, CLRINT, CLRSCSIINT); 1936 ahc_restart(ahc); 1937 } else { 1938 printk("%s: Missing case in ahc_handle_scsiint. status = %x\n", 1939 ahc_name(ahc), status); 1940 ahc_outb(ahc, CLRINT, CLRSCSIINT); 1941 } 1942 } 1943 1944 /* 1945 * Force renegotiation to occur the next time we initiate 1946 * a command to the current device. 1947 */ 1948 static void ahc_force_renegotiation(struct ahc_softc * ahc,struct ahc_devinfo * devinfo)1949 ahc_force_renegotiation(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 1950 { 1951 struct ahc_initiator_tinfo *targ_info; 1952 struct ahc_tmode_tstate *tstate; 1953 1954 targ_info = ahc_fetch_transinfo(ahc, 1955 devinfo->channel, 1956 devinfo->our_scsiid, 1957 devinfo->target, 1958 &tstate); 1959 ahc_update_neg_request(ahc, devinfo, tstate, 1960 targ_info, AHC_NEG_IF_NON_ASYNC); 1961 } 1962 1963 #define AHC_MAX_STEPS 2000 1964 static void ahc_clear_critical_section(struct ahc_softc * ahc)1965 ahc_clear_critical_section(struct ahc_softc *ahc) 1966 { 1967 int stepping; 1968 int steps; 1969 u_int simode0; 1970 u_int simode1; 1971 1972 if (ahc->num_critical_sections == 0) 1973 return; 1974 1975 stepping = FALSE; 1976 steps = 0; 1977 simode0 = 0; 1978 simode1 = 0; 1979 for (;;) { 1980 struct cs *cs; 1981 u_int seqaddr; 1982 u_int i; 1983 1984 seqaddr = ahc_inb(ahc, SEQADDR0) 1985 | (ahc_inb(ahc, SEQADDR1) << 8); 1986 1987 /* 1988 * Seqaddr represents the next instruction to execute, 1989 * so we are really executing the instruction just 1990 * before it. 1991 */ 1992 if (seqaddr != 0) 1993 seqaddr -= 1; 1994 cs = ahc->critical_sections; 1995 for (i = 0; i < ahc->num_critical_sections; i++, cs++) { 1996 if (cs->begin < seqaddr && cs->end >= seqaddr) 1997 break; 1998 } 1999 2000 if (i == ahc->num_critical_sections) 2001 break; 2002 2003 if (steps > AHC_MAX_STEPS) { 2004 printk("%s: Infinite loop in critical section\n", 2005 ahc_name(ahc)); 2006 ahc_dump_card_state(ahc); 2007 panic("critical section loop"); 2008 } 2009 2010 steps++; 2011 if (stepping == FALSE) { 2012 2013 /* 2014 * Disable all interrupt sources so that the 2015 * sequencer will not be stuck by a pausing 2016 * interrupt condition while we attempt to 2017 * leave a critical section. 2018 */ 2019 simode0 = ahc_inb(ahc, SIMODE0); 2020 ahc_outb(ahc, SIMODE0, 0); 2021 simode1 = ahc_inb(ahc, SIMODE1); 2022 if ((ahc->features & AHC_DT) != 0) 2023 /* 2024 * On DT class controllers, we 2025 * use the enhanced busfree logic. 2026 * Unfortunately we cannot re-enable 2027 * busfree detection within the 2028 * current connection, so we must 2029 * leave it on while single stepping. 2030 */ 2031 ahc_outb(ahc, SIMODE1, simode1 & ENBUSFREE); 2032 else 2033 ahc_outb(ahc, SIMODE1, 0); 2034 ahc_outb(ahc, CLRINT, CLRSCSIINT); 2035 ahc_outb(ahc, SEQCTL, ahc->seqctl | STEP); 2036 stepping = TRUE; 2037 } 2038 if ((ahc->features & AHC_DT) != 0) { 2039 ahc_outb(ahc, CLRSINT1, CLRBUSFREE); 2040 ahc_outb(ahc, CLRINT, CLRSCSIINT); 2041 } 2042 ahc_outb(ahc, HCNTRL, ahc->unpause); 2043 while (!ahc_is_paused(ahc)) 2044 ahc_delay(200); 2045 } 2046 if (stepping) { 2047 ahc_outb(ahc, SIMODE0, simode0); 2048 ahc_outb(ahc, SIMODE1, simode1); 2049 ahc_outb(ahc, SEQCTL, ahc->seqctl); 2050 } 2051 } 2052 2053 /* 2054 * Clear any pending interrupt status. 2055 */ 2056 static void ahc_clear_intstat(struct ahc_softc * ahc)2057 ahc_clear_intstat(struct ahc_softc *ahc) 2058 { 2059 /* Clear any interrupt conditions this may have caused */ 2060 ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRATNO|CLRSCSIRSTI 2061 |CLRBUSFREE|CLRSCSIPERR|CLRPHASECHG| 2062 CLRREQINIT); 2063 ahc_flush_device_writes(ahc); 2064 ahc_outb(ahc, CLRSINT0, CLRSELDO|CLRSELDI|CLRSELINGO); 2065 ahc_flush_device_writes(ahc); 2066 ahc_outb(ahc, CLRINT, CLRSCSIINT); 2067 ahc_flush_device_writes(ahc); 2068 } 2069 2070 /**************************** Debugging Routines ******************************/ 2071 #ifdef AHC_DEBUG 2072 uint32_t ahc_debug = AHC_DEBUG_OPTS; 2073 #endif 2074 2075 #if 0 /* unused */ 2076 static void 2077 ahc_print_scb(struct scb *scb) 2078 { 2079 int i; 2080 2081 struct hardware_scb *hscb = scb->hscb; 2082 2083 printk("scb:%p control:0x%x scsiid:0x%x lun:%d cdb_len:%d\n", 2084 (void *)scb, 2085 hscb->control, 2086 hscb->scsiid, 2087 hscb->lun, 2088 hscb->cdb_len); 2089 printk("Shared Data: "); 2090 for (i = 0; i < sizeof(hscb->shared_data.cdb); i++) 2091 printk("%#02x", hscb->shared_data.cdb[i]); 2092 printk(" dataptr:%#x datacnt:%#x sgptr:%#x tag:%#x\n", 2093 ahc_le32toh(hscb->dataptr), 2094 ahc_le32toh(hscb->datacnt), 2095 ahc_le32toh(hscb->sgptr), 2096 hscb->tag); 2097 if (scb->sg_count > 0) { 2098 for (i = 0; i < scb->sg_count; i++) { 2099 printk("sg[%d] - Addr 0x%x%x : Length %d\n", 2100 i, 2101 (ahc_le32toh(scb->sg_list[i].len) >> 24 2102 & SG_HIGH_ADDR_BITS), 2103 ahc_le32toh(scb->sg_list[i].addr), 2104 ahc_le32toh(scb->sg_list[i].len)); 2105 } 2106 } 2107 } 2108 #endif 2109 2110 /************************* Transfer Negotiation *******************************/ 2111 /* 2112 * Allocate per target mode instance (ID we respond to as a target) 2113 * transfer negotiation data structures. 2114 */ 2115 static struct ahc_tmode_tstate * ahc_alloc_tstate(struct ahc_softc * ahc,u_int scsi_id,char channel)2116 ahc_alloc_tstate(struct ahc_softc *ahc, u_int scsi_id, char channel) 2117 { 2118 struct ahc_tmode_tstate *master_tstate; 2119 struct ahc_tmode_tstate *tstate; 2120 int i; 2121 2122 master_tstate = ahc->enabled_targets[ahc->our_id]; 2123 if (channel == 'B') { 2124 scsi_id += 8; 2125 master_tstate = ahc->enabled_targets[ahc->our_id_b + 8]; 2126 } 2127 if (ahc->enabled_targets[scsi_id] != NULL 2128 && ahc->enabled_targets[scsi_id] != master_tstate) 2129 panic("%s: ahc_alloc_tstate - Target already allocated", 2130 ahc_name(ahc)); 2131 tstate = kmalloc(sizeof(*tstate), GFP_ATOMIC); 2132 if (tstate == NULL) 2133 return (NULL); 2134 2135 /* 2136 * If we have allocated a master tstate, copy user settings from 2137 * the master tstate (taken from SRAM or the EEPROM) for this 2138 * channel, but reset our current and goal settings to async/narrow 2139 * until an initiator talks to us. 2140 */ 2141 if (master_tstate != NULL) { 2142 memcpy(tstate, master_tstate, sizeof(*tstate)); 2143 memset(tstate->enabled_luns, 0, sizeof(tstate->enabled_luns)); 2144 tstate->ultraenb = 0; 2145 for (i = 0; i < AHC_NUM_TARGETS; i++) { 2146 memset(&tstate->transinfo[i].curr, 0, 2147 sizeof(tstate->transinfo[i].curr)); 2148 memset(&tstate->transinfo[i].goal, 0, 2149 sizeof(tstate->transinfo[i].goal)); 2150 } 2151 } else 2152 memset(tstate, 0, sizeof(*tstate)); 2153 ahc->enabled_targets[scsi_id] = tstate; 2154 return (tstate); 2155 } 2156 2157 #ifdef AHC_TARGET_MODE 2158 /* 2159 * Free per target mode instance (ID we respond to as a target) 2160 * transfer negotiation data structures. 2161 */ 2162 static void ahc_free_tstate(struct ahc_softc * ahc,u_int scsi_id,char channel,int force)2163 ahc_free_tstate(struct ahc_softc *ahc, u_int scsi_id, char channel, int force) 2164 { 2165 struct ahc_tmode_tstate *tstate; 2166 2167 /* 2168 * Don't clean up our "master" tstate. 2169 * It has our default user settings. 2170 */ 2171 if (((channel == 'B' && scsi_id == ahc->our_id_b) 2172 || (channel == 'A' && scsi_id == ahc->our_id)) 2173 && force == FALSE) 2174 return; 2175 2176 if (channel == 'B') 2177 scsi_id += 8; 2178 tstate = ahc->enabled_targets[scsi_id]; 2179 kfree(tstate); 2180 ahc->enabled_targets[scsi_id] = NULL; 2181 } 2182 #endif 2183 2184 /* 2185 * Called when we have an active connection to a target on the bus, 2186 * this function finds the nearest syncrate to the input period limited 2187 * by the capabilities of the bus connectivity of and sync settings for 2188 * the target. 2189 */ 2190 static const struct ahc_syncrate * ahc_devlimited_syncrate(struct ahc_softc * ahc,struct ahc_initiator_tinfo * tinfo,u_int * period,u_int * ppr_options,role_t role)2191 ahc_devlimited_syncrate(struct ahc_softc *ahc, 2192 struct ahc_initiator_tinfo *tinfo, 2193 u_int *period, u_int *ppr_options, role_t role) 2194 { 2195 struct ahc_transinfo *transinfo; 2196 u_int maxsync; 2197 2198 if ((ahc->features & AHC_ULTRA2) != 0) { 2199 if ((ahc_inb(ahc, SBLKCTL) & ENAB40) != 0 2200 && (ahc_inb(ahc, SSTAT2) & EXP_ACTIVE) == 0) { 2201 maxsync = AHC_SYNCRATE_DT; 2202 } else { 2203 maxsync = AHC_SYNCRATE_ULTRA; 2204 /* Can't do DT on an SE bus */ 2205 *ppr_options &= ~MSG_EXT_PPR_DT_REQ; 2206 } 2207 } else if ((ahc->features & AHC_ULTRA) != 0) { 2208 maxsync = AHC_SYNCRATE_ULTRA; 2209 } else { 2210 maxsync = AHC_SYNCRATE_FAST; 2211 } 2212 /* 2213 * Never allow a value higher than our current goal 2214 * period otherwise we may allow a target initiated 2215 * negotiation to go above the limit as set by the 2216 * user. In the case of an initiator initiated 2217 * sync negotiation, we limit based on the user 2218 * setting. This allows the system to still accept 2219 * incoming negotiations even if target initiated 2220 * negotiation is not performed. 2221 */ 2222 if (role == ROLE_TARGET) 2223 transinfo = &tinfo->user; 2224 else 2225 transinfo = &tinfo->goal; 2226 *ppr_options &= transinfo->ppr_options; 2227 if (transinfo->width == MSG_EXT_WDTR_BUS_8_BIT) { 2228 maxsync = max(maxsync, (u_int)AHC_SYNCRATE_ULTRA2); 2229 *ppr_options &= ~MSG_EXT_PPR_DT_REQ; 2230 } 2231 if (transinfo->period == 0) { 2232 *period = 0; 2233 *ppr_options = 0; 2234 return (NULL); 2235 } 2236 *period = max(*period, (u_int)transinfo->period); 2237 return (ahc_find_syncrate(ahc, period, ppr_options, maxsync)); 2238 } 2239 2240 /* 2241 * Look up the valid period to SCSIRATE conversion in our table. 2242 * Return the period and offset that should be sent to the target 2243 * if this was the beginning of an SDTR. 2244 */ 2245 const struct ahc_syncrate * ahc_find_syncrate(struct ahc_softc * ahc,u_int * period,u_int * ppr_options,u_int maxsync)2246 ahc_find_syncrate(struct ahc_softc *ahc, u_int *period, 2247 u_int *ppr_options, u_int maxsync) 2248 { 2249 const struct ahc_syncrate *syncrate; 2250 2251 if ((ahc->features & AHC_DT) == 0) 2252 *ppr_options &= ~MSG_EXT_PPR_DT_REQ; 2253 2254 /* Skip all DT only entries if DT is not available */ 2255 if ((*ppr_options & MSG_EXT_PPR_DT_REQ) == 0 2256 && maxsync < AHC_SYNCRATE_ULTRA2) 2257 maxsync = AHC_SYNCRATE_ULTRA2; 2258 2259 /* Now set the maxsync based on the card capabilities 2260 * DT is already done above */ 2261 if ((ahc->features & (AHC_DT | AHC_ULTRA2)) == 0 2262 && maxsync < AHC_SYNCRATE_ULTRA) 2263 maxsync = AHC_SYNCRATE_ULTRA; 2264 if ((ahc->features & (AHC_DT | AHC_ULTRA2 | AHC_ULTRA)) == 0 2265 && maxsync < AHC_SYNCRATE_FAST) 2266 maxsync = AHC_SYNCRATE_FAST; 2267 2268 for (syncrate = &ahc_syncrates[maxsync]; 2269 syncrate->rate != NULL; 2270 syncrate++) { 2271 2272 /* 2273 * The Ultra2 table doesn't go as low 2274 * as for the Fast/Ultra cards. 2275 */ 2276 if ((ahc->features & AHC_ULTRA2) != 0 2277 && (syncrate->sxfr_u2 == 0)) 2278 break; 2279 2280 if (*period <= syncrate->period) { 2281 /* 2282 * When responding to a target that requests 2283 * sync, the requested rate may fall between 2284 * two rates that we can output, but still be 2285 * a rate that we can receive. Because of this, 2286 * we want to respond to the target with 2287 * the same rate that it sent to us even 2288 * if the period we use to send data to it 2289 * is lower. Only lower the response period 2290 * if we must. 2291 */ 2292 if (syncrate == &ahc_syncrates[maxsync]) 2293 *period = syncrate->period; 2294 2295 /* 2296 * At some speeds, we only support 2297 * ST transfers. 2298 */ 2299 if ((syncrate->sxfr_u2 & ST_SXFR) != 0) 2300 *ppr_options &= ~MSG_EXT_PPR_DT_REQ; 2301 break; 2302 } 2303 } 2304 2305 if ((*period == 0) 2306 || (syncrate->rate == NULL) 2307 || ((ahc->features & AHC_ULTRA2) != 0 2308 && (syncrate->sxfr_u2 == 0))) { 2309 /* Use asynchronous transfers. */ 2310 *period = 0; 2311 syncrate = NULL; 2312 *ppr_options &= ~MSG_EXT_PPR_DT_REQ; 2313 } 2314 return (syncrate); 2315 } 2316 2317 /* 2318 * Convert from an entry in our syncrate table to the SCSI equivalent 2319 * sync "period" factor. 2320 */ 2321 u_int ahc_find_period(struct ahc_softc * ahc,u_int scsirate,u_int maxsync)2322 ahc_find_period(struct ahc_softc *ahc, u_int scsirate, u_int maxsync) 2323 { 2324 const struct ahc_syncrate *syncrate; 2325 2326 if ((ahc->features & AHC_ULTRA2) != 0) 2327 scsirate &= SXFR_ULTRA2; 2328 else 2329 scsirate &= SXFR; 2330 2331 /* now set maxsync based on card capabilities */ 2332 if ((ahc->features & AHC_DT) == 0 && maxsync < AHC_SYNCRATE_ULTRA2) 2333 maxsync = AHC_SYNCRATE_ULTRA2; 2334 if ((ahc->features & (AHC_DT | AHC_ULTRA2)) == 0 2335 && maxsync < AHC_SYNCRATE_ULTRA) 2336 maxsync = AHC_SYNCRATE_ULTRA; 2337 if ((ahc->features & (AHC_DT | AHC_ULTRA2 | AHC_ULTRA)) == 0 2338 && maxsync < AHC_SYNCRATE_FAST) 2339 maxsync = AHC_SYNCRATE_FAST; 2340 2341 2342 syncrate = &ahc_syncrates[maxsync]; 2343 while (syncrate->rate != NULL) { 2344 2345 if ((ahc->features & AHC_ULTRA2) != 0) { 2346 if (syncrate->sxfr_u2 == 0) 2347 break; 2348 else if (scsirate == (syncrate->sxfr_u2 & SXFR_ULTRA2)) 2349 return (syncrate->period); 2350 } else if (scsirate == (syncrate->sxfr & SXFR)) { 2351 return (syncrate->period); 2352 } 2353 syncrate++; 2354 } 2355 return (0); /* async */ 2356 } 2357 2358 /* 2359 * Truncate the given synchronous offset to a value the 2360 * current adapter type and syncrate are capable of. 2361 */ 2362 static void ahc_validate_offset(struct ahc_softc * ahc,struct ahc_initiator_tinfo * tinfo,const struct ahc_syncrate * syncrate,u_int * offset,int wide,role_t role)2363 ahc_validate_offset(struct ahc_softc *ahc, 2364 struct ahc_initiator_tinfo *tinfo, 2365 const struct ahc_syncrate *syncrate, 2366 u_int *offset, int wide, role_t role) 2367 { 2368 u_int maxoffset; 2369 2370 /* Limit offset to what we can do */ 2371 if (syncrate == NULL) { 2372 maxoffset = 0; 2373 } else if ((ahc->features & AHC_ULTRA2) != 0) { 2374 maxoffset = MAX_OFFSET_ULTRA2; 2375 } else { 2376 if (wide) 2377 maxoffset = MAX_OFFSET_16BIT; 2378 else 2379 maxoffset = MAX_OFFSET_8BIT; 2380 } 2381 *offset = min(*offset, maxoffset); 2382 if (tinfo != NULL) { 2383 if (role == ROLE_TARGET) 2384 *offset = min(*offset, (u_int)tinfo->user.offset); 2385 else 2386 *offset = min(*offset, (u_int)tinfo->goal.offset); 2387 } 2388 } 2389 2390 /* 2391 * Truncate the given transfer width parameter to a value the 2392 * current adapter type is capable of. 2393 */ 2394 static void ahc_validate_width(struct ahc_softc * ahc,struct ahc_initiator_tinfo * tinfo,u_int * bus_width,role_t role)2395 ahc_validate_width(struct ahc_softc *ahc, struct ahc_initiator_tinfo *tinfo, 2396 u_int *bus_width, role_t role) 2397 { 2398 switch (*bus_width) { 2399 default: 2400 if (ahc->features & AHC_WIDE) { 2401 /* Respond Wide */ 2402 *bus_width = MSG_EXT_WDTR_BUS_16_BIT; 2403 break; 2404 } 2405 fallthrough; 2406 case MSG_EXT_WDTR_BUS_8_BIT: 2407 *bus_width = MSG_EXT_WDTR_BUS_8_BIT; 2408 break; 2409 } 2410 if (tinfo != NULL) { 2411 if (role == ROLE_TARGET) 2412 *bus_width = min((u_int)tinfo->user.width, *bus_width); 2413 else 2414 *bus_width = min((u_int)tinfo->goal.width, *bus_width); 2415 } 2416 } 2417 2418 /* 2419 * Update the bitmask of targets for which the controller should 2420 * negotiate with at the next convenient opportunity. This currently 2421 * means the next time we send the initial identify messages for 2422 * a new transaction. 2423 */ 2424 int ahc_update_neg_request(struct ahc_softc * ahc,struct ahc_devinfo * devinfo,struct ahc_tmode_tstate * tstate,struct ahc_initiator_tinfo * tinfo,ahc_neg_type neg_type)2425 ahc_update_neg_request(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 2426 struct ahc_tmode_tstate *tstate, 2427 struct ahc_initiator_tinfo *tinfo, ahc_neg_type neg_type) 2428 { 2429 u_int auto_negotiate_orig; 2430 2431 auto_negotiate_orig = tstate->auto_negotiate; 2432 if (neg_type == AHC_NEG_ALWAYS) { 2433 /* 2434 * Force our "current" settings to be 2435 * unknown so that unless a bus reset 2436 * occurs the need to renegotiate is 2437 * recorded persistently. 2438 */ 2439 if ((ahc->features & AHC_WIDE) != 0) 2440 tinfo->curr.width = AHC_WIDTH_UNKNOWN; 2441 tinfo->curr.period = AHC_PERIOD_UNKNOWN; 2442 tinfo->curr.offset = AHC_OFFSET_UNKNOWN; 2443 } 2444 if (tinfo->curr.period != tinfo->goal.period 2445 || tinfo->curr.width != tinfo->goal.width 2446 || tinfo->curr.offset != tinfo->goal.offset 2447 || tinfo->curr.ppr_options != tinfo->goal.ppr_options 2448 || (neg_type == AHC_NEG_IF_NON_ASYNC 2449 && (tinfo->goal.offset != 0 2450 || tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT 2451 || tinfo->goal.ppr_options != 0))) 2452 tstate->auto_negotiate |= devinfo->target_mask; 2453 else 2454 tstate->auto_negotiate &= ~devinfo->target_mask; 2455 2456 return (auto_negotiate_orig != tstate->auto_negotiate); 2457 } 2458 2459 /* 2460 * Update the user/goal/curr tables of synchronous negotiation 2461 * parameters as well as, in the case of a current or active update, 2462 * any data structures on the host controller. In the case of an 2463 * active update, the specified target is currently talking to us on 2464 * the bus, so the transfer parameter update must take effect 2465 * immediately. 2466 */ 2467 void ahc_set_syncrate(struct ahc_softc * ahc,struct ahc_devinfo * devinfo,const struct ahc_syncrate * syncrate,u_int period,u_int offset,u_int ppr_options,u_int type,int paused)2468 ahc_set_syncrate(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 2469 const struct ahc_syncrate *syncrate, u_int period, 2470 u_int offset, u_int ppr_options, u_int type, int paused) 2471 { 2472 struct ahc_initiator_tinfo *tinfo; 2473 struct ahc_tmode_tstate *tstate; 2474 u_int old_period; 2475 u_int old_offset; 2476 u_int old_ppr; 2477 int active; 2478 int update_needed; 2479 2480 active = (type & AHC_TRANS_ACTIVE) == AHC_TRANS_ACTIVE; 2481 update_needed = 0; 2482 2483 if (syncrate == NULL) { 2484 period = 0; 2485 offset = 0; 2486 } 2487 2488 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid, 2489 devinfo->target, &tstate); 2490 2491 if ((type & AHC_TRANS_USER) != 0) { 2492 tinfo->user.period = period; 2493 tinfo->user.offset = offset; 2494 tinfo->user.ppr_options = ppr_options; 2495 } 2496 2497 if ((type & AHC_TRANS_GOAL) != 0) { 2498 tinfo->goal.period = period; 2499 tinfo->goal.offset = offset; 2500 tinfo->goal.ppr_options = ppr_options; 2501 } 2502 2503 old_period = tinfo->curr.period; 2504 old_offset = tinfo->curr.offset; 2505 old_ppr = tinfo->curr.ppr_options; 2506 2507 if ((type & AHC_TRANS_CUR) != 0 2508 && (old_period != period 2509 || old_offset != offset 2510 || old_ppr != ppr_options)) { 2511 u_int scsirate; 2512 2513 update_needed++; 2514 scsirate = tinfo->scsirate; 2515 if ((ahc->features & AHC_ULTRA2) != 0) { 2516 2517 scsirate &= ~(SXFR_ULTRA2|SINGLE_EDGE|ENABLE_CRC); 2518 if (syncrate != NULL) { 2519 scsirate |= syncrate->sxfr_u2; 2520 if ((ppr_options & MSG_EXT_PPR_DT_REQ) != 0) 2521 scsirate |= ENABLE_CRC; 2522 else 2523 scsirate |= SINGLE_EDGE; 2524 } 2525 } else { 2526 2527 scsirate &= ~(SXFR|SOFS); 2528 /* 2529 * Ensure Ultra mode is set properly for 2530 * this target. 2531 */ 2532 tstate->ultraenb &= ~devinfo->target_mask; 2533 if (syncrate != NULL) { 2534 if (syncrate->sxfr & ULTRA_SXFR) { 2535 tstate->ultraenb |= 2536 devinfo->target_mask; 2537 } 2538 scsirate |= syncrate->sxfr & SXFR; 2539 scsirate |= offset & SOFS; 2540 } 2541 if (active) { 2542 u_int sxfrctl0; 2543 2544 sxfrctl0 = ahc_inb(ahc, SXFRCTL0); 2545 sxfrctl0 &= ~FAST20; 2546 if (tstate->ultraenb & devinfo->target_mask) 2547 sxfrctl0 |= FAST20; 2548 ahc_outb(ahc, SXFRCTL0, sxfrctl0); 2549 } 2550 } 2551 if (active) { 2552 ahc_outb(ahc, SCSIRATE, scsirate); 2553 if ((ahc->features & AHC_ULTRA2) != 0) 2554 ahc_outb(ahc, SCSIOFFSET, offset); 2555 } 2556 2557 tinfo->scsirate = scsirate; 2558 tinfo->curr.period = period; 2559 tinfo->curr.offset = offset; 2560 tinfo->curr.ppr_options = ppr_options; 2561 2562 ahc_send_async(ahc, devinfo->channel, devinfo->target, 2563 CAM_LUN_WILDCARD, AC_TRANSFER_NEG); 2564 if (bootverbose) { 2565 if (offset != 0) { 2566 printk("%s: target %d synchronous at %sMHz%s, " 2567 "offset = 0x%x\n", ahc_name(ahc), 2568 devinfo->target, syncrate->rate, 2569 (ppr_options & MSG_EXT_PPR_DT_REQ) 2570 ? " DT" : "", offset); 2571 } else { 2572 printk("%s: target %d using " 2573 "asynchronous transfers\n", 2574 ahc_name(ahc), devinfo->target); 2575 } 2576 } 2577 } 2578 2579 update_needed += ahc_update_neg_request(ahc, devinfo, tstate, 2580 tinfo, AHC_NEG_TO_GOAL); 2581 2582 if (update_needed) 2583 ahc_update_pending_scbs(ahc); 2584 } 2585 2586 /* 2587 * Update the user/goal/curr tables of wide negotiation 2588 * parameters as well as, in the case of a current or active update, 2589 * any data structures on the host controller. In the case of an 2590 * active update, the specified target is currently talking to us on 2591 * the bus, so the transfer parameter update must take effect 2592 * immediately. 2593 */ 2594 void ahc_set_width(struct ahc_softc * ahc,struct ahc_devinfo * devinfo,u_int width,u_int type,int paused)2595 ahc_set_width(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 2596 u_int width, u_int type, int paused) 2597 { 2598 struct ahc_initiator_tinfo *tinfo; 2599 struct ahc_tmode_tstate *tstate; 2600 u_int oldwidth; 2601 int active; 2602 int update_needed; 2603 2604 active = (type & AHC_TRANS_ACTIVE) == AHC_TRANS_ACTIVE; 2605 update_needed = 0; 2606 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid, 2607 devinfo->target, &tstate); 2608 2609 if ((type & AHC_TRANS_USER) != 0) 2610 tinfo->user.width = width; 2611 2612 if ((type & AHC_TRANS_GOAL) != 0) 2613 tinfo->goal.width = width; 2614 2615 oldwidth = tinfo->curr.width; 2616 if ((type & AHC_TRANS_CUR) != 0 && oldwidth != width) { 2617 u_int scsirate; 2618 2619 update_needed++; 2620 scsirate = tinfo->scsirate; 2621 scsirate &= ~WIDEXFER; 2622 if (width == MSG_EXT_WDTR_BUS_16_BIT) 2623 scsirate |= WIDEXFER; 2624 2625 tinfo->scsirate = scsirate; 2626 2627 if (active) 2628 ahc_outb(ahc, SCSIRATE, scsirate); 2629 2630 tinfo->curr.width = width; 2631 2632 ahc_send_async(ahc, devinfo->channel, devinfo->target, 2633 CAM_LUN_WILDCARD, AC_TRANSFER_NEG); 2634 if (bootverbose) { 2635 printk("%s: target %d using %dbit transfers\n", 2636 ahc_name(ahc), devinfo->target, 2637 8 * (0x01 << width)); 2638 } 2639 } 2640 2641 update_needed += ahc_update_neg_request(ahc, devinfo, tstate, 2642 tinfo, AHC_NEG_TO_GOAL); 2643 if (update_needed) 2644 ahc_update_pending_scbs(ahc); 2645 } 2646 2647 /* 2648 * Update the current state of tagged queuing for a given target. 2649 */ 2650 static void ahc_set_tags(struct ahc_softc * ahc,struct scsi_cmnd * cmd,struct ahc_devinfo * devinfo,ahc_queue_alg alg)2651 ahc_set_tags(struct ahc_softc *ahc, struct scsi_cmnd *cmd, 2652 struct ahc_devinfo *devinfo, ahc_queue_alg alg) 2653 { 2654 struct scsi_device *sdev = cmd->device; 2655 2656 ahc_platform_set_tags(ahc, sdev, devinfo, alg); 2657 ahc_send_async(ahc, devinfo->channel, devinfo->target, 2658 devinfo->lun, AC_TRANSFER_NEG); 2659 } 2660 2661 /* 2662 * When the transfer settings for a connection change, update any 2663 * in-transit SCBs to contain the new data so the hardware will 2664 * be set correctly during future (re)selections. 2665 */ 2666 static void ahc_update_pending_scbs(struct ahc_softc * ahc)2667 ahc_update_pending_scbs(struct ahc_softc *ahc) 2668 { 2669 struct scb *pending_scb; 2670 int pending_scb_count; 2671 int i; 2672 int paused; 2673 u_int saved_scbptr; 2674 2675 /* 2676 * Traverse the pending SCB list and ensure that all of the 2677 * SCBs there have the proper settings. 2678 */ 2679 pending_scb_count = 0; 2680 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2681 struct ahc_devinfo devinfo; 2682 struct hardware_scb *pending_hscb; 2683 struct ahc_initiator_tinfo *tinfo; 2684 struct ahc_tmode_tstate *tstate; 2685 2686 ahc_scb_devinfo(ahc, &devinfo, pending_scb); 2687 tinfo = ahc_fetch_transinfo(ahc, devinfo.channel, 2688 devinfo.our_scsiid, 2689 devinfo.target, &tstate); 2690 pending_hscb = pending_scb->hscb; 2691 pending_hscb->control &= ~ULTRAENB; 2692 if ((tstate->ultraenb & devinfo.target_mask) != 0) 2693 pending_hscb->control |= ULTRAENB; 2694 pending_hscb->scsirate = tinfo->scsirate; 2695 pending_hscb->scsioffset = tinfo->curr.offset; 2696 if ((tstate->auto_negotiate & devinfo.target_mask) == 0 2697 && (pending_scb->flags & SCB_AUTO_NEGOTIATE) != 0) { 2698 pending_scb->flags &= ~SCB_AUTO_NEGOTIATE; 2699 pending_hscb->control &= ~MK_MESSAGE; 2700 } 2701 ahc_sync_scb(ahc, pending_scb, 2702 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 2703 pending_scb_count++; 2704 } 2705 2706 if (pending_scb_count == 0) 2707 return; 2708 2709 if (ahc_is_paused(ahc)) { 2710 paused = 1; 2711 } else { 2712 paused = 0; 2713 ahc_pause(ahc); 2714 } 2715 2716 saved_scbptr = ahc_inb(ahc, SCBPTR); 2717 /* Ensure that the hscbs down on the card match the new information */ 2718 for (i = 0; i < ahc->scb_data->maxhscbs; i++) { 2719 struct hardware_scb *pending_hscb; 2720 u_int control; 2721 u_int scb_tag; 2722 2723 ahc_outb(ahc, SCBPTR, i); 2724 scb_tag = ahc_inb(ahc, SCB_TAG); 2725 pending_scb = ahc_lookup_scb(ahc, scb_tag); 2726 if (pending_scb == NULL) 2727 continue; 2728 2729 pending_hscb = pending_scb->hscb; 2730 control = ahc_inb(ahc, SCB_CONTROL); 2731 control &= ~(ULTRAENB|MK_MESSAGE); 2732 control |= pending_hscb->control & (ULTRAENB|MK_MESSAGE); 2733 ahc_outb(ahc, SCB_CONTROL, control); 2734 ahc_outb(ahc, SCB_SCSIRATE, pending_hscb->scsirate); 2735 ahc_outb(ahc, SCB_SCSIOFFSET, pending_hscb->scsioffset); 2736 } 2737 ahc_outb(ahc, SCBPTR, saved_scbptr); 2738 2739 if (paused == 0) 2740 ahc_unpause(ahc); 2741 } 2742 2743 /**************************** Pathing Information *****************************/ 2744 static void ahc_fetch_devinfo(struct ahc_softc * ahc,struct ahc_devinfo * devinfo)2745 ahc_fetch_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 2746 { 2747 u_int saved_scsiid; 2748 role_t role; 2749 int our_id; 2750 2751 if (ahc_inb(ahc, SSTAT0) & TARGET) 2752 role = ROLE_TARGET; 2753 else 2754 role = ROLE_INITIATOR; 2755 2756 if (role == ROLE_TARGET 2757 && (ahc->features & AHC_MULTI_TID) != 0 2758 && (ahc_inb(ahc, SEQ_FLAGS) 2759 & (CMDPHASE_PENDING|TARG_CMD_PENDING|NO_DISCONNECT)) != 0) { 2760 /* We were selected, so pull our id from TARGIDIN */ 2761 our_id = ahc_inb(ahc, TARGIDIN) & OID; 2762 } else if ((ahc->features & AHC_ULTRA2) != 0) 2763 our_id = ahc_inb(ahc, SCSIID_ULTRA2) & OID; 2764 else 2765 our_id = ahc_inb(ahc, SCSIID) & OID; 2766 2767 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); 2768 ahc_compile_devinfo(devinfo, 2769 our_id, 2770 SCSIID_TARGET(ahc, saved_scsiid), 2771 ahc_inb(ahc, SAVED_LUN), 2772 SCSIID_CHANNEL(ahc, saved_scsiid), 2773 role); 2774 } 2775 2776 static const struct ahc_phase_table_entry* ahc_lookup_phase_entry(int phase)2777 ahc_lookup_phase_entry(int phase) 2778 { 2779 const struct ahc_phase_table_entry *entry; 2780 const struct ahc_phase_table_entry *last_entry; 2781 2782 /* 2783 * num_phases doesn't include the default entry which 2784 * will be returned if the phase doesn't match. 2785 */ 2786 last_entry = &ahc_phase_table[num_phases]; 2787 for (entry = ahc_phase_table; entry < last_entry; entry++) { 2788 if (phase == entry->phase) 2789 break; 2790 } 2791 return (entry); 2792 } 2793 2794 void ahc_compile_devinfo(struct ahc_devinfo * devinfo,u_int our_id,u_int target,u_int lun,char channel,role_t role)2795 ahc_compile_devinfo(struct ahc_devinfo *devinfo, u_int our_id, u_int target, 2796 u_int lun, char channel, role_t role) 2797 { 2798 devinfo->our_scsiid = our_id; 2799 devinfo->target = target; 2800 devinfo->lun = lun; 2801 devinfo->target_offset = target; 2802 devinfo->channel = channel; 2803 devinfo->role = role; 2804 if (channel == 'B') 2805 devinfo->target_offset += 8; 2806 devinfo->target_mask = (0x01 << devinfo->target_offset); 2807 } 2808 2809 void ahc_print_devinfo(struct ahc_softc * ahc,struct ahc_devinfo * devinfo)2810 ahc_print_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 2811 { 2812 printk("%s:%c:%d:%d: ", ahc_name(ahc), devinfo->channel, 2813 devinfo->target, devinfo->lun); 2814 } 2815 2816 static void ahc_scb_devinfo(struct ahc_softc * ahc,struct ahc_devinfo * devinfo,struct scb * scb)2817 ahc_scb_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 2818 struct scb *scb) 2819 { 2820 role_t role; 2821 int our_id; 2822 2823 our_id = SCSIID_OUR_ID(scb->hscb->scsiid); 2824 role = ROLE_INITIATOR; 2825 if ((scb->flags & SCB_TARGET_SCB) != 0) 2826 role = ROLE_TARGET; 2827 ahc_compile_devinfo(devinfo, our_id, SCB_GET_TARGET(ahc, scb), 2828 SCB_GET_LUN(scb), SCB_GET_CHANNEL(ahc, scb), role); 2829 } 2830 2831 2832 /************************ Message Phase Processing ****************************/ 2833 static void ahc_assert_atn(struct ahc_softc * ahc)2834 ahc_assert_atn(struct ahc_softc *ahc) 2835 { 2836 u_int scsisigo; 2837 2838 scsisigo = ATNO; 2839 if ((ahc->features & AHC_DT) == 0) 2840 scsisigo |= ahc_inb(ahc, SCSISIGI); 2841 ahc_outb(ahc, SCSISIGO, scsisigo); 2842 } 2843 2844 /* 2845 * When an initiator transaction with the MK_MESSAGE flag either reconnects 2846 * or enters the initial message out phase, we are interrupted. Fill our 2847 * outgoing message buffer with the appropriate message and beging handing 2848 * the message phase(s) manually. 2849 */ 2850 static void ahc_setup_initiator_msgout(struct ahc_softc * ahc,struct ahc_devinfo * devinfo,struct scb * scb)2851 ahc_setup_initiator_msgout(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 2852 struct scb *scb) 2853 { 2854 /* 2855 * To facilitate adding multiple messages together, 2856 * each routine should increment the index and len 2857 * variables instead of setting them explicitly. 2858 */ 2859 ahc->msgout_index = 0; 2860 ahc->msgout_len = 0; 2861 2862 if ((scb->flags & SCB_DEVICE_RESET) == 0 2863 && ahc_inb(ahc, MSG_OUT) == MSG_IDENTIFYFLAG) { 2864 u_int identify_msg; 2865 2866 identify_msg = MSG_IDENTIFYFLAG | SCB_GET_LUN(scb); 2867 if ((scb->hscb->control & DISCENB) != 0) 2868 identify_msg |= MSG_IDENTIFY_DISCFLAG; 2869 ahc->msgout_buf[ahc->msgout_index++] = identify_msg; 2870 ahc->msgout_len++; 2871 2872 if ((scb->hscb->control & TAG_ENB) != 0) { 2873 ahc->msgout_buf[ahc->msgout_index++] = 2874 scb->hscb->control & (TAG_ENB|SCB_TAG_TYPE); 2875 ahc->msgout_buf[ahc->msgout_index++] = scb->hscb->tag; 2876 ahc->msgout_len += 2; 2877 } 2878 } 2879 2880 if (scb->flags & SCB_DEVICE_RESET) { 2881 ahc->msgout_buf[ahc->msgout_index++] = TARGET_RESET; 2882 ahc->msgout_len++; 2883 ahc_print_path(ahc, scb); 2884 printk("Bus Device Reset Message Sent\n"); 2885 /* 2886 * Clear our selection hardware in advance of 2887 * the busfree. We may have an entry in the waiting 2888 * Q for this target, and we don't want to go about 2889 * selecting while we handle the busfree and blow it 2890 * away. 2891 */ 2892 ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO)); 2893 } else if ((scb->flags & SCB_ABORT) != 0) { 2894 if ((scb->hscb->control & TAG_ENB) != 0) 2895 ahc->msgout_buf[ahc->msgout_index++] = ABORT_TASK; 2896 else 2897 ahc->msgout_buf[ahc->msgout_index++] = ABORT_TASK_SET; 2898 ahc->msgout_len++; 2899 ahc_print_path(ahc, scb); 2900 printk("Abort%s Message Sent\n", 2901 (scb->hscb->control & TAG_ENB) != 0 ? " Tag" : ""); 2902 /* 2903 * Clear our selection hardware in advance of 2904 * the busfree. We may have an entry in the waiting 2905 * Q for this target, and we don't want to go about 2906 * selecting while we handle the busfree and blow it 2907 * away. 2908 */ 2909 ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO)); 2910 } else if ((scb->flags & (SCB_AUTO_NEGOTIATE|SCB_NEGOTIATE)) != 0) { 2911 ahc_build_transfer_msg(ahc, devinfo); 2912 } else { 2913 printk("ahc_intr: AWAITING_MSG for an SCB that " 2914 "does not have a waiting message\n"); 2915 printk("SCSIID = %x, target_mask = %x\n", scb->hscb->scsiid, 2916 devinfo->target_mask); 2917 panic("SCB = %d, SCB Control = %x, MSG_OUT = %x " 2918 "SCB flags = %x", scb->hscb->tag, scb->hscb->control, 2919 ahc_inb(ahc, MSG_OUT), scb->flags); 2920 } 2921 2922 /* 2923 * Clear the MK_MESSAGE flag from the SCB so we aren't 2924 * asked to send this message again. 2925 */ 2926 ahc_outb(ahc, SCB_CONTROL, ahc_inb(ahc, SCB_CONTROL) & ~MK_MESSAGE); 2927 scb->hscb->control &= ~MK_MESSAGE; 2928 ahc->msgout_index = 0; 2929 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT; 2930 } 2931 2932 /* 2933 * Build an appropriate transfer negotiation message for the 2934 * currently active target. 2935 */ 2936 static void ahc_build_transfer_msg(struct ahc_softc * ahc,struct ahc_devinfo * devinfo)2937 ahc_build_transfer_msg(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 2938 { 2939 /* 2940 * We need to initiate transfer negotiations. 2941 * If our current and goal settings are identical, 2942 * we want to renegotiate due to a check condition. 2943 */ 2944 struct ahc_initiator_tinfo *tinfo; 2945 struct ahc_tmode_tstate *tstate; 2946 const struct ahc_syncrate *rate; 2947 int dowide; 2948 int dosync; 2949 int doppr; 2950 u_int period; 2951 u_int ppr_options; 2952 u_int offset; 2953 2954 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid, 2955 devinfo->target, &tstate); 2956 /* 2957 * Filter our period based on the current connection. 2958 * If we can't perform DT transfers on this segment (not in LVD 2959 * mode for instance), then our decision to issue a PPR message 2960 * may change. 2961 */ 2962 period = tinfo->goal.period; 2963 offset = tinfo->goal.offset; 2964 ppr_options = tinfo->goal.ppr_options; 2965 /* Target initiated PPR is not allowed in the SCSI spec */ 2966 if (devinfo->role == ROLE_TARGET) 2967 ppr_options = 0; 2968 rate = ahc_devlimited_syncrate(ahc, tinfo, &period, 2969 &ppr_options, devinfo->role); 2970 dowide = tinfo->curr.width != tinfo->goal.width; 2971 dosync = tinfo->curr.offset != offset || tinfo->curr.period != period; 2972 /* 2973 * Only use PPR if we have options that need it, even if the device 2974 * claims to support it. There might be an expander in the way 2975 * that doesn't. 2976 */ 2977 doppr = ppr_options != 0; 2978 2979 if (!dowide && !dosync && !doppr) { 2980 dowide = tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT; 2981 dosync = tinfo->goal.offset != 0; 2982 } 2983 2984 if (!dowide && !dosync && !doppr) { 2985 /* 2986 * Force async with a WDTR message if we have a wide bus, 2987 * or just issue an SDTR with a 0 offset. 2988 */ 2989 if ((ahc->features & AHC_WIDE) != 0) 2990 dowide = 1; 2991 else 2992 dosync = 1; 2993 2994 if (bootverbose) { 2995 ahc_print_devinfo(ahc, devinfo); 2996 printk("Ensuring async\n"); 2997 } 2998 } 2999 3000 /* Target initiated PPR is not allowed in the SCSI spec */ 3001 if (devinfo->role == ROLE_TARGET) 3002 doppr = 0; 3003 3004 /* 3005 * Both the PPR message and SDTR message require the 3006 * goal syncrate to be limited to what the target device 3007 * is capable of handling (based on whether an LVD->SE 3008 * expander is on the bus), so combine these two cases. 3009 * Regardless, guarantee that if we are using WDTR and SDTR 3010 * messages that WDTR comes first. 3011 */ 3012 if (doppr || (dosync && !dowide)) { 3013 3014 offset = tinfo->goal.offset; 3015 ahc_validate_offset(ahc, tinfo, rate, &offset, 3016 doppr ? tinfo->goal.width 3017 : tinfo->curr.width, 3018 devinfo->role); 3019 if (doppr) { 3020 ahc_construct_ppr(ahc, devinfo, period, offset, 3021 tinfo->goal.width, ppr_options); 3022 } else { 3023 ahc_construct_sdtr(ahc, devinfo, period, offset); 3024 } 3025 } else { 3026 ahc_construct_wdtr(ahc, devinfo, tinfo->goal.width); 3027 } 3028 } 3029 3030 /* 3031 * Build a synchronous negotiation message in our message 3032 * buffer based on the input parameters. 3033 */ 3034 static void ahc_construct_sdtr(struct ahc_softc * ahc,struct ahc_devinfo * devinfo,u_int period,u_int offset)3035 ahc_construct_sdtr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 3036 u_int period, u_int offset) 3037 { 3038 if (offset == 0) 3039 period = AHC_ASYNC_XFER_PERIOD; 3040 ahc->msgout_index += spi_populate_sync_msg( 3041 ahc->msgout_buf + ahc->msgout_index, period, offset); 3042 ahc->msgout_len += 5; 3043 if (bootverbose) { 3044 printk("(%s:%c:%d:%d): Sending SDTR period %x, offset %x\n", 3045 ahc_name(ahc), devinfo->channel, devinfo->target, 3046 devinfo->lun, period, offset); 3047 } 3048 } 3049 3050 /* 3051 * Build a wide negotiation message in our message 3052 * buffer based on the input parameters. 3053 */ 3054 static void ahc_construct_wdtr(struct ahc_softc * ahc,struct ahc_devinfo * devinfo,u_int bus_width)3055 ahc_construct_wdtr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 3056 u_int bus_width) 3057 { 3058 ahc->msgout_index += spi_populate_width_msg( 3059 ahc->msgout_buf + ahc->msgout_index, bus_width); 3060 ahc->msgout_len += 4; 3061 if (bootverbose) { 3062 printk("(%s:%c:%d:%d): Sending WDTR %x\n", 3063 ahc_name(ahc), devinfo->channel, devinfo->target, 3064 devinfo->lun, bus_width); 3065 } 3066 } 3067 3068 /* 3069 * Build a parallel protocol request message in our message 3070 * buffer based on the input parameters. 3071 */ 3072 static void ahc_construct_ppr(struct ahc_softc * ahc,struct ahc_devinfo * devinfo,u_int period,u_int offset,u_int bus_width,u_int ppr_options)3073 ahc_construct_ppr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 3074 u_int period, u_int offset, u_int bus_width, 3075 u_int ppr_options) 3076 { 3077 if (offset == 0) 3078 period = AHC_ASYNC_XFER_PERIOD; 3079 ahc->msgout_index += spi_populate_ppr_msg( 3080 ahc->msgout_buf + ahc->msgout_index, period, offset, 3081 bus_width, ppr_options); 3082 ahc->msgout_len += 8; 3083 if (bootverbose) { 3084 printk("(%s:%c:%d:%d): Sending PPR bus_width %x, period %x, " 3085 "offset %x, ppr_options %x\n", ahc_name(ahc), 3086 devinfo->channel, devinfo->target, devinfo->lun, 3087 bus_width, period, offset, ppr_options); 3088 } 3089 } 3090 3091 /* 3092 * Clear any active message state. 3093 */ 3094 static void ahc_clear_msg_state(struct ahc_softc * ahc)3095 ahc_clear_msg_state(struct ahc_softc *ahc) 3096 { 3097 ahc->msgout_len = 0; 3098 ahc->msgin_index = 0; 3099 ahc->msg_type = MSG_TYPE_NONE; 3100 if ((ahc_inb(ahc, SCSISIGI) & ATNI) != 0) { 3101 /* 3102 * The target didn't care to respond to our 3103 * message request, so clear ATN. 3104 */ 3105 ahc_outb(ahc, CLRSINT1, CLRATNO); 3106 } 3107 ahc_outb(ahc, MSG_OUT, NOP); 3108 ahc_outb(ahc, SEQ_FLAGS2, 3109 ahc_inb(ahc, SEQ_FLAGS2) & ~TARGET_MSG_PENDING); 3110 } 3111 3112 static void ahc_handle_proto_violation(struct ahc_softc * ahc)3113 ahc_handle_proto_violation(struct ahc_softc *ahc) 3114 { 3115 struct ahc_devinfo devinfo; 3116 struct scb *scb; 3117 u_int scbid; 3118 u_int seq_flags; 3119 u_int curphase; 3120 u_int lastphase; 3121 int found; 3122 3123 ahc_fetch_devinfo(ahc, &devinfo); 3124 scbid = ahc_inb(ahc, SCB_TAG); 3125 scb = ahc_lookup_scb(ahc, scbid); 3126 seq_flags = ahc_inb(ahc, SEQ_FLAGS); 3127 curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK; 3128 lastphase = ahc_inb(ahc, LASTPHASE); 3129 if ((seq_flags & NOT_IDENTIFIED) != 0) { 3130 3131 /* 3132 * The reconnecting target either did not send an 3133 * identify message, or did, but we didn't find an SCB 3134 * to match. 3135 */ 3136 ahc_print_devinfo(ahc, &devinfo); 3137 printk("Target did not send an IDENTIFY message. " 3138 "LASTPHASE = 0x%x.\n", lastphase); 3139 scb = NULL; 3140 } else if (scb == NULL) { 3141 /* 3142 * We don't seem to have an SCB active for this 3143 * transaction. Print an error and reset the bus. 3144 */ 3145 ahc_print_devinfo(ahc, &devinfo); 3146 printk("No SCB found during protocol violation\n"); 3147 goto proto_violation_reset; 3148 } else { 3149 ahc_set_transaction_status(scb, CAM_SEQUENCE_FAIL); 3150 if ((seq_flags & NO_CDB_SENT) != 0) { 3151 ahc_print_path(ahc, scb); 3152 printk("No or incomplete CDB sent to device.\n"); 3153 } else if ((ahc_inb(ahc, SCB_CONTROL) & STATUS_RCVD) == 0) { 3154 /* 3155 * The target never bothered to provide status to 3156 * us prior to completing the command. Since we don't 3157 * know the disposition of this command, we must attempt 3158 * to abort it. Assert ATN and prepare to send an abort 3159 * message. 3160 */ 3161 ahc_print_path(ahc, scb); 3162 printk("Completed command without status.\n"); 3163 } else { 3164 ahc_print_path(ahc, scb); 3165 printk("Unknown protocol violation.\n"); 3166 ahc_dump_card_state(ahc); 3167 } 3168 } 3169 if ((lastphase & ~P_DATAIN_DT) == 0 3170 || lastphase == P_COMMAND) { 3171 proto_violation_reset: 3172 /* 3173 * Target either went directly to data/command 3174 * phase or didn't respond to our ATN. 3175 * The only safe thing to do is to blow 3176 * it away with a bus reset. 3177 */ 3178 found = ahc_reset_channel(ahc, 'A', TRUE); 3179 printk("%s: Issued Channel %c Bus Reset. " 3180 "%d SCBs aborted\n", ahc_name(ahc), 'A', found); 3181 } else { 3182 /* 3183 * Leave the selection hardware off in case 3184 * this abort attempt will affect yet to 3185 * be sent commands. 3186 */ 3187 ahc_outb(ahc, SCSISEQ, 3188 ahc_inb(ahc, SCSISEQ) & ~ENSELO); 3189 ahc_assert_atn(ahc); 3190 ahc_outb(ahc, MSG_OUT, HOST_MSG); 3191 if (scb == NULL) { 3192 ahc_print_devinfo(ahc, &devinfo); 3193 ahc->msgout_buf[0] = ABORT_TASK; 3194 ahc->msgout_len = 1; 3195 ahc->msgout_index = 0; 3196 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT; 3197 } else { 3198 ahc_print_path(ahc, scb); 3199 scb->flags |= SCB_ABORT; 3200 } 3201 printk("Protocol violation %s. Attempting to abort.\n", 3202 ahc_lookup_phase_entry(curphase)->phasemsg); 3203 } 3204 } 3205 3206 /* 3207 * Manual message loop handler. 3208 */ 3209 static void ahc_handle_message_phase(struct ahc_softc * ahc)3210 ahc_handle_message_phase(struct ahc_softc *ahc) 3211 { 3212 struct ahc_devinfo devinfo; 3213 u_int bus_phase; 3214 int end_session; 3215 3216 ahc_fetch_devinfo(ahc, &devinfo); 3217 end_session = FALSE; 3218 bus_phase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK; 3219 3220 reswitch: 3221 switch (ahc->msg_type) { 3222 case MSG_TYPE_INITIATOR_MSGOUT: 3223 { 3224 int lastbyte; 3225 int phasemis; 3226 int msgdone; 3227 3228 if (ahc->msgout_len == 0) 3229 panic("HOST_MSG_LOOP interrupt with no active message"); 3230 3231 #ifdef AHC_DEBUG 3232 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) { 3233 ahc_print_devinfo(ahc, &devinfo); 3234 printk("INITIATOR_MSG_OUT"); 3235 } 3236 #endif 3237 phasemis = bus_phase != P_MESGOUT; 3238 if (phasemis) { 3239 #ifdef AHC_DEBUG 3240 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) { 3241 printk(" PHASEMIS %s\n", 3242 ahc_lookup_phase_entry(bus_phase) 3243 ->phasemsg); 3244 } 3245 #endif 3246 if (bus_phase == P_MESGIN) { 3247 /* 3248 * Change gears and see if 3249 * this messages is of interest to 3250 * us or should be passed back to 3251 * the sequencer. 3252 */ 3253 ahc_outb(ahc, CLRSINT1, CLRATNO); 3254 ahc->send_msg_perror = FALSE; 3255 ahc->msg_type = MSG_TYPE_INITIATOR_MSGIN; 3256 ahc->msgin_index = 0; 3257 goto reswitch; 3258 } 3259 end_session = TRUE; 3260 break; 3261 } 3262 3263 if (ahc->send_msg_perror) { 3264 ahc_outb(ahc, CLRSINT1, CLRATNO); 3265 ahc_outb(ahc, CLRSINT1, CLRREQINIT); 3266 #ifdef AHC_DEBUG 3267 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) 3268 printk(" byte 0x%x\n", ahc->send_msg_perror); 3269 #endif 3270 ahc_outb(ahc, SCSIDATL, MSG_PARITY_ERROR); 3271 break; 3272 } 3273 3274 msgdone = ahc->msgout_index == ahc->msgout_len; 3275 if (msgdone) { 3276 /* 3277 * The target has requested a retry. 3278 * Re-assert ATN, reset our message index to 3279 * 0, and try again. 3280 */ 3281 ahc->msgout_index = 0; 3282 ahc_assert_atn(ahc); 3283 } 3284 3285 lastbyte = ahc->msgout_index == (ahc->msgout_len - 1); 3286 if (lastbyte) { 3287 /* Last byte is signified by dropping ATN */ 3288 ahc_outb(ahc, CLRSINT1, CLRATNO); 3289 } 3290 3291 /* 3292 * Clear our interrupt status and present 3293 * the next byte on the bus. 3294 */ 3295 ahc_outb(ahc, CLRSINT1, CLRREQINIT); 3296 #ifdef AHC_DEBUG 3297 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) 3298 printk(" byte 0x%x\n", 3299 ahc->msgout_buf[ahc->msgout_index]); 3300 #endif 3301 ahc_outb(ahc, SCSIDATL, ahc->msgout_buf[ahc->msgout_index++]); 3302 break; 3303 } 3304 case MSG_TYPE_INITIATOR_MSGIN: 3305 { 3306 int phasemis; 3307 int message_done; 3308 3309 #ifdef AHC_DEBUG 3310 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) { 3311 ahc_print_devinfo(ahc, &devinfo); 3312 printk("INITIATOR_MSG_IN"); 3313 } 3314 #endif 3315 phasemis = bus_phase != P_MESGIN; 3316 if (phasemis) { 3317 #ifdef AHC_DEBUG 3318 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) { 3319 printk(" PHASEMIS %s\n", 3320 ahc_lookup_phase_entry(bus_phase) 3321 ->phasemsg); 3322 } 3323 #endif 3324 ahc->msgin_index = 0; 3325 if (bus_phase == P_MESGOUT 3326 && (ahc->send_msg_perror == TRUE 3327 || (ahc->msgout_len != 0 3328 && ahc->msgout_index == 0))) { 3329 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT; 3330 goto reswitch; 3331 } 3332 end_session = TRUE; 3333 break; 3334 } 3335 3336 /* Pull the byte in without acking it */ 3337 ahc->msgin_buf[ahc->msgin_index] = ahc_inb(ahc, SCSIBUSL); 3338 #ifdef AHC_DEBUG 3339 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) 3340 printk(" byte 0x%x\n", 3341 ahc->msgin_buf[ahc->msgin_index]); 3342 #endif 3343 3344 message_done = ahc_parse_msg(ahc, &devinfo); 3345 3346 if (message_done) { 3347 /* 3348 * Clear our incoming message buffer in case there 3349 * is another message following this one. 3350 */ 3351 ahc->msgin_index = 0; 3352 3353 /* 3354 * If this message illicited a response, 3355 * assert ATN so the target takes us to the 3356 * message out phase. 3357 */ 3358 if (ahc->msgout_len != 0) { 3359 #ifdef AHC_DEBUG 3360 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) { 3361 ahc_print_devinfo(ahc, &devinfo); 3362 printk("Asserting ATN for response\n"); 3363 } 3364 #endif 3365 ahc_assert_atn(ahc); 3366 } 3367 } else 3368 ahc->msgin_index++; 3369 3370 if (message_done == MSGLOOP_TERMINATED) { 3371 end_session = TRUE; 3372 } else { 3373 /* Ack the byte */ 3374 ahc_outb(ahc, CLRSINT1, CLRREQINIT); 3375 ahc_inb(ahc, SCSIDATL); 3376 } 3377 break; 3378 } 3379 case MSG_TYPE_TARGET_MSGIN: 3380 { 3381 int msgdone; 3382 int msgout_request; 3383 3384 if (ahc->msgout_len == 0) 3385 panic("Target MSGIN with no active message"); 3386 3387 /* 3388 * If we interrupted a mesgout session, the initiator 3389 * will not know this until our first REQ. So, we 3390 * only honor mesgout requests after we've sent our 3391 * first byte. 3392 */ 3393 if ((ahc_inb(ahc, SCSISIGI) & ATNI) != 0 3394 && ahc->msgout_index > 0) 3395 msgout_request = TRUE; 3396 else 3397 msgout_request = FALSE; 3398 3399 if (msgout_request) { 3400 3401 /* 3402 * Change gears and see if 3403 * this messages is of interest to 3404 * us or should be passed back to 3405 * the sequencer. 3406 */ 3407 ahc->msg_type = MSG_TYPE_TARGET_MSGOUT; 3408 ahc_outb(ahc, SCSISIGO, P_MESGOUT | BSYO); 3409 ahc->msgin_index = 0; 3410 /* Dummy read to REQ for first byte */ 3411 ahc_inb(ahc, SCSIDATL); 3412 ahc_outb(ahc, SXFRCTL0, 3413 ahc_inb(ahc, SXFRCTL0) | SPIOEN); 3414 break; 3415 } 3416 3417 msgdone = ahc->msgout_index == ahc->msgout_len; 3418 if (msgdone) { 3419 ahc_outb(ahc, SXFRCTL0, 3420 ahc_inb(ahc, SXFRCTL0) & ~SPIOEN); 3421 end_session = TRUE; 3422 break; 3423 } 3424 3425 /* 3426 * Present the next byte on the bus. 3427 */ 3428 ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) | SPIOEN); 3429 ahc_outb(ahc, SCSIDATL, ahc->msgout_buf[ahc->msgout_index++]); 3430 break; 3431 } 3432 case MSG_TYPE_TARGET_MSGOUT: 3433 { 3434 int lastbyte; 3435 int msgdone; 3436 3437 /* 3438 * The initiator signals that this is 3439 * the last byte by dropping ATN. 3440 */ 3441 lastbyte = (ahc_inb(ahc, SCSISIGI) & ATNI) == 0; 3442 3443 /* 3444 * Read the latched byte, but turn off SPIOEN first 3445 * so that we don't inadvertently cause a REQ for the 3446 * next byte. 3447 */ 3448 ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) & ~SPIOEN); 3449 ahc->msgin_buf[ahc->msgin_index] = ahc_inb(ahc, SCSIDATL); 3450 msgdone = ahc_parse_msg(ahc, &devinfo); 3451 if (msgdone == MSGLOOP_TERMINATED) { 3452 /* 3453 * The message is *really* done in that it caused 3454 * us to go to bus free. The sequencer has already 3455 * been reset at this point, so pull the ejection 3456 * handle. 3457 */ 3458 return; 3459 } 3460 3461 ahc->msgin_index++; 3462 3463 /* 3464 * XXX Read spec about initiator dropping ATN too soon 3465 * and use msgdone to detect it. 3466 */ 3467 if (msgdone == MSGLOOP_MSGCOMPLETE) { 3468 ahc->msgin_index = 0; 3469 3470 /* 3471 * If this message illicited a response, transition 3472 * to the Message in phase and send it. 3473 */ 3474 if (ahc->msgout_len != 0) { 3475 ahc_outb(ahc, SCSISIGO, P_MESGIN | BSYO); 3476 ahc_outb(ahc, SXFRCTL0, 3477 ahc_inb(ahc, SXFRCTL0) | SPIOEN); 3478 ahc->msg_type = MSG_TYPE_TARGET_MSGIN; 3479 ahc->msgin_index = 0; 3480 break; 3481 } 3482 } 3483 3484 if (lastbyte) 3485 end_session = TRUE; 3486 else { 3487 /* Ask for the next byte. */ 3488 ahc_outb(ahc, SXFRCTL0, 3489 ahc_inb(ahc, SXFRCTL0) | SPIOEN); 3490 } 3491 3492 break; 3493 } 3494 default: 3495 panic("Unknown REQINIT message type"); 3496 } 3497 3498 if (end_session) { 3499 ahc_clear_msg_state(ahc); 3500 ahc_outb(ahc, RETURN_1, EXIT_MSG_LOOP); 3501 } else 3502 ahc_outb(ahc, RETURN_1, CONT_MSG_LOOP); 3503 } 3504 3505 /* 3506 * See if we sent a particular extended message to the target. 3507 * If "full" is true, return true only if the target saw the full 3508 * message. If "full" is false, return true if the target saw at 3509 * least the first byte of the message. 3510 */ 3511 static int ahc_sent_msg(struct ahc_softc * ahc,ahc_msgtype type,u_int msgval,int full)3512 ahc_sent_msg(struct ahc_softc *ahc, ahc_msgtype type, u_int msgval, int full) 3513 { 3514 int found; 3515 u_int index; 3516 3517 found = FALSE; 3518 index = 0; 3519 3520 while (index < ahc->msgout_len) { 3521 if (ahc->msgout_buf[index] == EXTENDED_MESSAGE) { 3522 u_int end_index; 3523 3524 end_index = index + 1 + ahc->msgout_buf[index + 1]; 3525 if (ahc->msgout_buf[index+2] == msgval 3526 && type == AHCMSG_EXT) { 3527 3528 if (full) { 3529 if (ahc->msgout_index > end_index) 3530 found = TRUE; 3531 } else if (ahc->msgout_index > index) 3532 found = TRUE; 3533 } 3534 index = end_index; 3535 } else if (ahc->msgout_buf[index] >= SIMPLE_QUEUE_TAG 3536 && ahc->msgout_buf[index] <= IGNORE_WIDE_RESIDUE) { 3537 3538 /* Skip tag type and tag id or residue param*/ 3539 index += 2; 3540 } else { 3541 /* Single byte message */ 3542 if (type == AHCMSG_1B 3543 && ahc->msgout_buf[index] == msgval 3544 && ahc->msgout_index > index) 3545 found = TRUE; 3546 index++; 3547 } 3548 3549 if (found) 3550 break; 3551 } 3552 return (found); 3553 } 3554 3555 /* 3556 * Wait for a complete incoming message, parse it, and respond accordingly. 3557 */ 3558 static int ahc_parse_msg(struct ahc_softc * ahc,struct ahc_devinfo * devinfo)3559 ahc_parse_msg(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 3560 { 3561 struct ahc_initiator_tinfo *tinfo; 3562 struct ahc_tmode_tstate *tstate; 3563 int reject; 3564 int done; 3565 int response; 3566 u_int targ_scsirate; 3567 3568 done = MSGLOOP_IN_PROG; 3569 response = FALSE; 3570 reject = FALSE; 3571 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid, 3572 devinfo->target, &tstate); 3573 targ_scsirate = tinfo->scsirate; 3574 3575 /* 3576 * Parse as much of the message as is available, 3577 * rejecting it if we don't support it. When 3578 * the entire message is available and has been 3579 * handled, return MSGLOOP_MSGCOMPLETE, indicating 3580 * that we have parsed an entire message. 3581 * 3582 * In the case of extended messages, we accept the length 3583 * byte outright and perform more checking once we know the 3584 * extended message type. 3585 */ 3586 switch (ahc->msgin_buf[0]) { 3587 case DISCONNECT: 3588 case SAVE_POINTERS: 3589 case COMMAND_COMPLETE: 3590 case RESTORE_POINTERS: 3591 case IGNORE_WIDE_RESIDUE: 3592 /* 3593 * End our message loop as these are messages 3594 * the sequencer handles on its own. 3595 */ 3596 done = MSGLOOP_TERMINATED; 3597 break; 3598 case MESSAGE_REJECT: 3599 response = ahc_handle_msg_reject(ahc, devinfo); 3600 fallthrough; 3601 case NOP: 3602 done = MSGLOOP_MSGCOMPLETE; 3603 break; 3604 case EXTENDED_MESSAGE: 3605 { 3606 /* Wait for enough of the message to begin validation */ 3607 if (ahc->msgin_index < 2) 3608 break; 3609 switch (ahc->msgin_buf[2]) { 3610 case EXTENDED_SDTR: 3611 { 3612 const struct ahc_syncrate *syncrate; 3613 u_int period; 3614 u_int ppr_options; 3615 u_int offset; 3616 u_int saved_offset; 3617 3618 if (ahc->msgin_buf[1] != MSG_EXT_SDTR_LEN) { 3619 reject = TRUE; 3620 break; 3621 } 3622 3623 /* 3624 * Wait until we have both args before validating 3625 * and acting on this message. 3626 * 3627 * Add one to MSG_EXT_SDTR_LEN to account for 3628 * the extended message preamble. 3629 */ 3630 if (ahc->msgin_index < (MSG_EXT_SDTR_LEN + 1)) 3631 break; 3632 3633 period = ahc->msgin_buf[3]; 3634 ppr_options = 0; 3635 saved_offset = offset = ahc->msgin_buf[4]; 3636 syncrate = ahc_devlimited_syncrate(ahc, tinfo, &period, 3637 &ppr_options, 3638 devinfo->role); 3639 ahc_validate_offset(ahc, tinfo, syncrate, &offset, 3640 targ_scsirate & WIDEXFER, 3641 devinfo->role); 3642 if (bootverbose) { 3643 printk("(%s:%c:%d:%d): Received " 3644 "SDTR period %x, offset %x\n\t" 3645 "Filtered to period %x, offset %x\n", 3646 ahc_name(ahc), devinfo->channel, 3647 devinfo->target, devinfo->lun, 3648 ahc->msgin_buf[3], saved_offset, 3649 period, offset); 3650 } 3651 ahc_set_syncrate(ahc, devinfo, 3652 syncrate, period, 3653 offset, ppr_options, 3654 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, 3655 /*paused*/TRUE); 3656 3657 /* 3658 * See if we initiated Sync Negotiation 3659 * and didn't have to fall down to async 3660 * transfers. 3661 */ 3662 if (ahc_sent_msg(ahc, AHCMSG_EXT, EXTENDED_SDTR, TRUE)) { 3663 /* We started it */ 3664 if (saved_offset != offset) { 3665 /* Went too low - force async */ 3666 reject = TRUE; 3667 } 3668 } else { 3669 /* 3670 * Send our own SDTR in reply 3671 */ 3672 if (bootverbose 3673 && devinfo->role == ROLE_INITIATOR) { 3674 printk("(%s:%c:%d:%d): Target " 3675 "Initiated SDTR\n", 3676 ahc_name(ahc), devinfo->channel, 3677 devinfo->target, devinfo->lun); 3678 } 3679 ahc->msgout_index = 0; 3680 ahc->msgout_len = 0; 3681 ahc_construct_sdtr(ahc, devinfo, 3682 period, offset); 3683 ahc->msgout_index = 0; 3684 response = TRUE; 3685 } 3686 done = MSGLOOP_MSGCOMPLETE; 3687 break; 3688 } 3689 case EXTENDED_WDTR: 3690 { 3691 u_int bus_width; 3692 u_int saved_width; 3693 u_int sending_reply; 3694 3695 sending_reply = FALSE; 3696 if (ahc->msgin_buf[1] != MSG_EXT_WDTR_LEN) { 3697 reject = TRUE; 3698 break; 3699 } 3700 3701 /* 3702 * Wait until we have our arg before validating 3703 * and acting on this message. 3704 * 3705 * Add one to MSG_EXT_WDTR_LEN to account for 3706 * the extended message preamble. 3707 */ 3708 if (ahc->msgin_index < (MSG_EXT_WDTR_LEN + 1)) 3709 break; 3710 3711 bus_width = ahc->msgin_buf[3]; 3712 saved_width = bus_width; 3713 ahc_validate_width(ahc, tinfo, &bus_width, 3714 devinfo->role); 3715 if (bootverbose) { 3716 printk("(%s:%c:%d:%d): Received WDTR " 3717 "%x filtered to %x\n", 3718 ahc_name(ahc), devinfo->channel, 3719 devinfo->target, devinfo->lun, 3720 saved_width, bus_width); 3721 } 3722 3723 if (ahc_sent_msg(ahc, AHCMSG_EXT, EXTENDED_WDTR, TRUE)) { 3724 /* 3725 * Don't send a WDTR back to the 3726 * target, since we asked first. 3727 * If the width went higher than our 3728 * request, reject it. 3729 */ 3730 if (saved_width > bus_width) { 3731 reject = TRUE; 3732 printk("(%s:%c:%d:%d): requested %dBit " 3733 "transfers. Rejecting...\n", 3734 ahc_name(ahc), devinfo->channel, 3735 devinfo->target, devinfo->lun, 3736 8 * (0x01 << bus_width)); 3737 bus_width = 0; 3738 } 3739 } else { 3740 /* 3741 * Send our own WDTR in reply 3742 */ 3743 if (bootverbose 3744 && devinfo->role == ROLE_INITIATOR) { 3745 printk("(%s:%c:%d:%d): Target " 3746 "Initiated WDTR\n", 3747 ahc_name(ahc), devinfo->channel, 3748 devinfo->target, devinfo->lun); 3749 } 3750 ahc->msgout_index = 0; 3751 ahc->msgout_len = 0; 3752 ahc_construct_wdtr(ahc, devinfo, bus_width); 3753 ahc->msgout_index = 0; 3754 response = TRUE; 3755 sending_reply = TRUE; 3756 } 3757 /* 3758 * After a wide message, we are async, but 3759 * some devices don't seem to honor this portion 3760 * of the spec. Force a renegotiation of the 3761 * sync component of our transfer agreement even 3762 * if our goal is async. By updating our width 3763 * after forcing the negotiation, we avoid 3764 * renegotiating for width. 3765 */ 3766 ahc_update_neg_request(ahc, devinfo, tstate, 3767 tinfo, AHC_NEG_ALWAYS); 3768 ahc_set_width(ahc, devinfo, bus_width, 3769 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, 3770 /*paused*/TRUE); 3771 if (sending_reply == FALSE && reject == FALSE) { 3772 3773 /* 3774 * We will always have an SDTR to send. 3775 */ 3776 ahc->msgout_index = 0; 3777 ahc->msgout_len = 0; 3778 ahc_build_transfer_msg(ahc, devinfo); 3779 ahc->msgout_index = 0; 3780 response = TRUE; 3781 } 3782 done = MSGLOOP_MSGCOMPLETE; 3783 break; 3784 } 3785 case EXTENDED_PPR: 3786 { 3787 const struct ahc_syncrate *syncrate; 3788 u_int period; 3789 u_int offset; 3790 u_int bus_width; 3791 u_int ppr_options; 3792 u_int saved_width; 3793 u_int saved_offset; 3794 u_int saved_ppr_options; 3795 3796 if (ahc->msgin_buf[1] != MSG_EXT_PPR_LEN) { 3797 reject = TRUE; 3798 break; 3799 } 3800 3801 /* 3802 * Wait until we have all args before validating 3803 * and acting on this message. 3804 * 3805 * Add one to MSG_EXT_PPR_LEN to account for 3806 * the extended message preamble. 3807 */ 3808 if (ahc->msgin_index < (MSG_EXT_PPR_LEN + 1)) 3809 break; 3810 3811 period = ahc->msgin_buf[3]; 3812 offset = ahc->msgin_buf[5]; 3813 bus_width = ahc->msgin_buf[6]; 3814 saved_width = bus_width; 3815 ppr_options = ahc->msgin_buf[7]; 3816 /* 3817 * According to the spec, a DT only 3818 * period factor with no DT option 3819 * set implies async. 3820 */ 3821 if ((ppr_options & MSG_EXT_PPR_DT_REQ) == 0 3822 && period == 9) 3823 offset = 0; 3824 saved_ppr_options = ppr_options; 3825 saved_offset = offset; 3826 3827 /* 3828 * Mask out any options we don't support 3829 * on any controller. Transfer options are 3830 * only available if we are negotiating wide. 3831 */ 3832 ppr_options &= MSG_EXT_PPR_DT_REQ; 3833 if (bus_width == 0) 3834 ppr_options = 0; 3835 3836 ahc_validate_width(ahc, tinfo, &bus_width, 3837 devinfo->role); 3838 syncrate = ahc_devlimited_syncrate(ahc, tinfo, &period, 3839 &ppr_options, 3840 devinfo->role); 3841 ahc_validate_offset(ahc, tinfo, syncrate, 3842 &offset, bus_width, 3843 devinfo->role); 3844 3845 if (ahc_sent_msg(ahc, AHCMSG_EXT, EXTENDED_PPR, TRUE)) { 3846 /* 3847 * If we are unable to do any of the 3848 * requested options (we went too low), 3849 * then we'll have to reject the message. 3850 */ 3851 if (saved_width > bus_width 3852 || saved_offset != offset 3853 || saved_ppr_options != ppr_options) { 3854 reject = TRUE; 3855 period = 0; 3856 offset = 0; 3857 bus_width = 0; 3858 ppr_options = 0; 3859 syncrate = NULL; 3860 } 3861 } else { 3862 if (devinfo->role != ROLE_TARGET) 3863 printk("(%s:%c:%d:%d): Target " 3864 "Initiated PPR\n", 3865 ahc_name(ahc), devinfo->channel, 3866 devinfo->target, devinfo->lun); 3867 else 3868 printk("(%s:%c:%d:%d): Initiator " 3869 "Initiated PPR\n", 3870 ahc_name(ahc), devinfo->channel, 3871 devinfo->target, devinfo->lun); 3872 ahc->msgout_index = 0; 3873 ahc->msgout_len = 0; 3874 ahc_construct_ppr(ahc, devinfo, period, offset, 3875 bus_width, ppr_options); 3876 ahc->msgout_index = 0; 3877 response = TRUE; 3878 } 3879 if (bootverbose) { 3880 printk("(%s:%c:%d:%d): Received PPR width %x, " 3881 "period %x, offset %x,options %x\n" 3882 "\tFiltered to width %x, period %x, " 3883 "offset %x, options %x\n", 3884 ahc_name(ahc), devinfo->channel, 3885 devinfo->target, devinfo->lun, 3886 saved_width, ahc->msgin_buf[3], 3887 saved_offset, saved_ppr_options, 3888 bus_width, period, offset, ppr_options); 3889 } 3890 ahc_set_width(ahc, devinfo, bus_width, 3891 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, 3892 /*paused*/TRUE); 3893 ahc_set_syncrate(ahc, devinfo, 3894 syncrate, period, 3895 offset, ppr_options, 3896 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, 3897 /*paused*/TRUE); 3898 done = MSGLOOP_MSGCOMPLETE; 3899 break; 3900 } 3901 default: 3902 /* Unknown extended message. Reject it. */ 3903 reject = TRUE; 3904 break; 3905 } 3906 break; 3907 } 3908 #ifdef AHC_TARGET_MODE 3909 case TARGET_RESET: 3910 ahc_handle_devreset(ahc, devinfo, 3911 CAM_BDR_SENT, 3912 "Bus Device Reset Received", 3913 /*verbose_level*/0); 3914 ahc_restart(ahc); 3915 done = MSGLOOP_TERMINATED; 3916 break; 3917 case ABORT_TASK: 3918 case ABORT_TASK_SET: 3919 case CLEAR_QUEUE_TASK_SET: 3920 { 3921 int tag; 3922 3923 /* Target mode messages */ 3924 if (devinfo->role != ROLE_TARGET) { 3925 reject = TRUE; 3926 break; 3927 } 3928 tag = SCB_LIST_NULL; 3929 if (ahc->msgin_buf[0] == ABORT_TASK) 3930 tag = ahc_inb(ahc, INITIATOR_TAG); 3931 ahc_abort_scbs(ahc, devinfo->target, devinfo->channel, 3932 devinfo->lun, tag, ROLE_TARGET, 3933 CAM_REQ_ABORTED); 3934 3935 tstate = ahc->enabled_targets[devinfo->our_scsiid]; 3936 if (tstate != NULL) { 3937 struct ahc_tmode_lstate* lstate; 3938 3939 lstate = tstate->enabled_luns[devinfo->lun]; 3940 if (lstate != NULL) { 3941 ahc_queue_lstate_event(ahc, lstate, 3942 devinfo->our_scsiid, 3943 ahc->msgin_buf[0], 3944 /*arg*/tag); 3945 ahc_send_lstate_events(ahc, lstate); 3946 } 3947 } 3948 ahc_restart(ahc); 3949 done = MSGLOOP_TERMINATED; 3950 break; 3951 } 3952 #endif 3953 case TERMINATE_IO_PROC: 3954 default: 3955 reject = TRUE; 3956 break; 3957 } 3958 3959 if (reject) { 3960 /* 3961 * Setup to reject the message. 3962 */ 3963 ahc->msgout_index = 0; 3964 ahc->msgout_len = 1; 3965 ahc->msgout_buf[0] = MESSAGE_REJECT; 3966 done = MSGLOOP_MSGCOMPLETE; 3967 response = TRUE; 3968 } 3969 3970 if (done != MSGLOOP_IN_PROG && !response) 3971 /* Clear the outgoing message buffer */ 3972 ahc->msgout_len = 0; 3973 3974 return (done); 3975 } 3976 3977 /* 3978 * Process a message reject message. 3979 */ 3980 static int ahc_handle_msg_reject(struct ahc_softc * ahc,struct ahc_devinfo * devinfo)3981 ahc_handle_msg_reject(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 3982 { 3983 /* 3984 * What we care about here is if we had an 3985 * outstanding SDTR or WDTR message for this 3986 * target. If we did, this is a signal that 3987 * the target is refusing negotiation. 3988 */ 3989 struct scb *scb; 3990 struct ahc_initiator_tinfo *tinfo; 3991 struct ahc_tmode_tstate *tstate; 3992 u_int scb_index; 3993 u_int last_msg; 3994 int response = 0; 3995 3996 scb_index = ahc_inb(ahc, SCB_TAG); 3997 scb = ahc_lookup_scb(ahc, scb_index); 3998 tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, 3999 devinfo->our_scsiid, 4000 devinfo->target, &tstate); 4001 /* Might be necessary */ 4002 last_msg = ahc_inb(ahc, LAST_MSG); 4003 4004 if (ahc_sent_msg(ahc, AHCMSG_EXT, EXTENDED_PPR, /*full*/FALSE)) { 4005 /* 4006 * Target does not support the PPR message. 4007 * Attempt to negotiate SPI-2 style. 4008 */ 4009 if (bootverbose) { 4010 printk("(%s:%c:%d:%d): PPR Rejected. " 4011 "Trying WDTR/SDTR\n", 4012 ahc_name(ahc), devinfo->channel, 4013 devinfo->target, devinfo->lun); 4014 } 4015 tinfo->goal.ppr_options = 0; 4016 tinfo->curr.transport_version = 2; 4017 tinfo->goal.transport_version = 2; 4018 ahc->msgout_index = 0; 4019 ahc->msgout_len = 0; 4020 ahc_build_transfer_msg(ahc, devinfo); 4021 ahc->msgout_index = 0; 4022 response = 1; 4023 } else if (ahc_sent_msg(ahc, AHCMSG_EXT, EXTENDED_WDTR, /*full*/FALSE)) { 4024 4025 /* note 8bit xfers */ 4026 printk("(%s:%c:%d:%d): refuses WIDE negotiation. Using " 4027 "8bit transfers\n", ahc_name(ahc), 4028 devinfo->channel, devinfo->target, devinfo->lun); 4029 ahc_set_width(ahc, devinfo, MSG_EXT_WDTR_BUS_8_BIT, 4030 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, 4031 /*paused*/TRUE); 4032 /* 4033 * No need to clear the sync rate. If the target 4034 * did not accept the command, our syncrate is 4035 * unaffected. If the target started the negotiation, 4036 * but rejected our response, we already cleared the 4037 * sync rate before sending our WDTR. 4038 */ 4039 if (tinfo->goal.offset != tinfo->curr.offset) { 4040 4041 /* Start the sync negotiation */ 4042 ahc->msgout_index = 0; 4043 ahc->msgout_len = 0; 4044 ahc_build_transfer_msg(ahc, devinfo); 4045 ahc->msgout_index = 0; 4046 response = 1; 4047 } 4048 } else if (ahc_sent_msg(ahc, AHCMSG_EXT, EXTENDED_SDTR, /*full*/FALSE)) { 4049 /* note asynch xfers and clear flag */ 4050 ahc_set_syncrate(ahc, devinfo, /*syncrate*/NULL, /*period*/0, 4051 /*offset*/0, /*ppr_options*/0, 4052 AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, 4053 /*paused*/TRUE); 4054 printk("(%s:%c:%d:%d): refuses synchronous negotiation. " 4055 "Using asynchronous transfers\n", 4056 ahc_name(ahc), devinfo->channel, 4057 devinfo->target, devinfo->lun); 4058 } else if ((scb->hscb->control & SIMPLE_QUEUE_TAG) != 0) { 4059 int tag_type; 4060 int mask; 4061 4062 tag_type = (scb->hscb->control & SIMPLE_QUEUE_TAG); 4063 4064 if (tag_type == SIMPLE_QUEUE_TAG) { 4065 printk("(%s:%c:%d:%d): refuses tagged commands. " 4066 "Performing non-tagged I/O\n", ahc_name(ahc), 4067 devinfo->channel, devinfo->target, devinfo->lun); 4068 ahc_set_tags(ahc, scb->io_ctx, devinfo, AHC_QUEUE_NONE); 4069 mask = ~0x23; 4070 } else { 4071 printk("(%s:%c:%d:%d): refuses %s tagged commands. " 4072 "Performing simple queue tagged I/O only\n", 4073 ahc_name(ahc), devinfo->channel, devinfo->target, 4074 devinfo->lun, tag_type == ORDERED_QUEUE_TAG 4075 ? "ordered" : "head of queue"); 4076 ahc_set_tags(ahc, scb->io_ctx, devinfo, AHC_QUEUE_BASIC); 4077 mask = ~0x03; 4078 } 4079 4080 /* 4081 * Resend the identify for this CCB as the target 4082 * may believe that the selection is invalid otherwise. 4083 */ 4084 ahc_outb(ahc, SCB_CONTROL, 4085 ahc_inb(ahc, SCB_CONTROL) & mask); 4086 scb->hscb->control &= mask; 4087 ahc_set_transaction_tag(scb, /*enabled*/FALSE, 4088 /*type*/SIMPLE_QUEUE_TAG); 4089 ahc_outb(ahc, MSG_OUT, MSG_IDENTIFYFLAG); 4090 ahc_assert_atn(ahc); 4091 4092 /* 4093 * This transaction is now at the head of 4094 * the untagged queue for this target. 4095 */ 4096 if ((ahc->flags & AHC_SCB_BTT) == 0) { 4097 struct scb_tailq *untagged_q; 4098 4099 untagged_q = 4100 &(ahc->untagged_queues[devinfo->target_offset]); 4101 TAILQ_INSERT_HEAD(untagged_q, scb, links.tqe); 4102 scb->flags |= SCB_UNTAGGEDQ; 4103 } 4104 ahc_busy_tcl(ahc, BUILD_TCL(scb->hscb->scsiid, devinfo->lun), 4105 scb->hscb->tag); 4106 4107 /* 4108 * Requeue all tagged commands for this target 4109 * currently in our possession so they can be 4110 * converted to untagged commands. 4111 */ 4112 ahc_search_qinfifo(ahc, SCB_GET_TARGET(ahc, scb), 4113 SCB_GET_CHANNEL(ahc, scb), 4114 SCB_GET_LUN(scb), /*tag*/SCB_LIST_NULL, 4115 ROLE_INITIATOR, CAM_REQUEUE_REQ, 4116 SEARCH_COMPLETE); 4117 } else { 4118 /* 4119 * Otherwise, we ignore it. 4120 */ 4121 printk("%s:%c:%d: Message reject for %x -- ignored\n", 4122 ahc_name(ahc), devinfo->channel, devinfo->target, 4123 last_msg); 4124 } 4125 return (response); 4126 } 4127 4128 /* 4129 * Process an ingnore wide residue message. 4130 */ 4131 static void ahc_handle_ign_wide_residue(struct ahc_softc * ahc,struct ahc_devinfo * devinfo)4132 ahc_handle_ign_wide_residue(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 4133 { 4134 u_int scb_index; 4135 struct scb *scb; 4136 4137 scb_index = ahc_inb(ahc, SCB_TAG); 4138 scb = ahc_lookup_scb(ahc, scb_index); 4139 /* 4140 * XXX Actually check data direction in the sequencer? 4141 * Perhaps add datadir to some spare bits in the hscb? 4142 */ 4143 if ((ahc_inb(ahc, SEQ_FLAGS) & DPHASE) == 0 4144 || ahc_get_transfer_dir(scb) != CAM_DIR_IN) { 4145 /* 4146 * Ignore the message if we haven't 4147 * seen an appropriate data phase yet. 4148 */ 4149 } else { 4150 /* 4151 * If the residual occurred on the last 4152 * transfer and the transfer request was 4153 * expected to end on an odd count, do 4154 * nothing. Otherwise, subtract a byte 4155 * and update the residual count accordingly. 4156 */ 4157 uint32_t sgptr; 4158 4159 sgptr = ahc_inb(ahc, SCB_RESIDUAL_SGPTR); 4160 if ((sgptr & SG_LIST_NULL) != 0 4161 && (ahc_inb(ahc, SCB_LUN) & SCB_XFERLEN_ODD) != 0) { 4162 /* 4163 * If the residual occurred on the last 4164 * transfer and the transfer request was 4165 * expected to end on an odd count, do 4166 * nothing. 4167 */ 4168 } else { 4169 struct ahc_dma_seg *sg; 4170 uint32_t data_cnt; 4171 uint32_t data_addr; 4172 uint32_t sglen; 4173 4174 /* Pull in all of the sgptr */ 4175 sgptr = ahc_inl(ahc, SCB_RESIDUAL_SGPTR); 4176 data_cnt = ahc_inl(ahc, SCB_RESIDUAL_DATACNT); 4177 4178 if ((sgptr & SG_LIST_NULL) != 0) { 4179 /* 4180 * The residual data count is not updated 4181 * for the command run to completion case. 4182 * Explicitly zero the count. 4183 */ 4184 data_cnt &= ~AHC_SG_LEN_MASK; 4185 } 4186 4187 data_addr = ahc_inl(ahc, SHADDR); 4188 4189 data_cnt += 1; 4190 data_addr -= 1; 4191 sgptr &= SG_PTR_MASK; 4192 4193 sg = ahc_sg_bus_to_virt(scb, sgptr); 4194 4195 /* 4196 * The residual sg ptr points to the next S/G 4197 * to load so we must go back one. 4198 */ 4199 sg--; 4200 sglen = ahc_le32toh(sg->len) & AHC_SG_LEN_MASK; 4201 if (sg != scb->sg_list 4202 && sglen < (data_cnt & AHC_SG_LEN_MASK)) { 4203 4204 sg--; 4205 sglen = ahc_le32toh(sg->len); 4206 /* 4207 * Preserve High Address and SG_LIST bits 4208 * while setting the count to 1. 4209 */ 4210 data_cnt = 1 | (sglen & (~AHC_SG_LEN_MASK)); 4211 data_addr = ahc_le32toh(sg->addr) 4212 + (sglen & AHC_SG_LEN_MASK) - 1; 4213 4214 /* 4215 * Increment sg so it points to the 4216 * "next" sg. 4217 */ 4218 sg++; 4219 sgptr = ahc_sg_virt_to_bus(scb, sg); 4220 } 4221 ahc_outl(ahc, SCB_RESIDUAL_SGPTR, sgptr); 4222 ahc_outl(ahc, SCB_RESIDUAL_DATACNT, data_cnt); 4223 /* 4224 * Toggle the "oddness" of the transfer length 4225 * to handle this mid-transfer ignore wide 4226 * residue. This ensures that the oddness is 4227 * correct for subsequent data transfers. 4228 */ 4229 ahc_outb(ahc, SCB_LUN, 4230 ahc_inb(ahc, SCB_LUN) ^ SCB_XFERLEN_ODD); 4231 } 4232 } 4233 } 4234 4235 4236 /* 4237 * Reinitialize the data pointers for the active transfer 4238 * based on its current residual. 4239 */ 4240 static void ahc_reinitialize_dataptrs(struct ahc_softc * ahc)4241 ahc_reinitialize_dataptrs(struct ahc_softc *ahc) 4242 { 4243 struct scb *scb; 4244 struct ahc_dma_seg *sg; 4245 u_int scb_index; 4246 uint32_t sgptr; 4247 uint32_t resid; 4248 uint32_t dataptr; 4249 4250 scb_index = ahc_inb(ahc, SCB_TAG); 4251 scb = ahc_lookup_scb(ahc, scb_index); 4252 sgptr = (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 3) << 24) 4253 | (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 2) << 16) 4254 | (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 1) << 8) 4255 | ahc_inb(ahc, SCB_RESIDUAL_SGPTR); 4256 4257 sgptr &= SG_PTR_MASK; 4258 sg = ahc_sg_bus_to_virt(scb, sgptr); 4259 4260 /* The residual sg_ptr always points to the next sg */ 4261 sg--; 4262 4263 resid = (ahc_inb(ahc, SCB_RESIDUAL_DATACNT + 2) << 16) 4264 | (ahc_inb(ahc, SCB_RESIDUAL_DATACNT + 1) << 8) 4265 | ahc_inb(ahc, SCB_RESIDUAL_DATACNT); 4266 4267 dataptr = ahc_le32toh(sg->addr) 4268 + (ahc_le32toh(sg->len) & AHC_SG_LEN_MASK) 4269 - resid; 4270 if ((ahc->flags & AHC_39BIT_ADDRESSING) != 0) { 4271 u_int dscommand1; 4272 4273 dscommand1 = ahc_inb(ahc, DSCOMMAND1); 4274 ahc_outb(ahc, DSCOMMAND1, dscommand1 | HADDLDSEL0); 4275 ahc_outb(ahc, HADDR, 4276 (ahc_le32toh(sg->len) >> 24) & SG_HIGH_ADDR_BITS); 4277 ahc_outb(ahc, DSCOMMAND1, dscommand1); 4278 } 4279 ahc_outb(ahc, HADDR + 3, dataptr >> 24); 4280 ahc_outb(ahc, HADDR + 2, dataptr >> 16); 4281 ahc_outb(ahc, HADDR + 1, dataptr >> 8); 4282 ahc_outb(ahc, HADDR, dataptr); 4283 ahc_outb(ahc, HCNT + 2, resid >> 16); 4284 ahc_outb(ahc, HCNT + 1, resid >> 8); 4285 ahc_outb(ahc, HCNT, resid); 4286 if ((ahc->features & AHC_ULTRA2) == 0) { 4287 ahc_outb(ahc, STCNT + 2, resid >> 16); 4288 ahc_outb(ahc, STCNT + 1, resid >> 8); 4289 ahc_outb(ahc, STCNT, resid); 4290 } 4291 } 4292 4293 /* 4294 * Handle the effects of issuing a bus device reset message. 4295 */ 4296 static void ahc_handle_devreset(struct ahc_softc * ahc,struct ahc_devinfo * devinfo,cam_status status,char * message,int verbose_level)4297 ahc_handle_devreset(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 4298 cam_status status, char *message, int verbose_level) 4299 { 4300 #ifdef AHC_TARGET_MODE 4301 struct ahc_tmode_tstate* tstate; 4302 u_int lun; 4303 #endif 4304 int found; 4305 4306 found = ahc_abort_scbs(ahc, devinfo->target, devinfo->channel, 4307 CAM_LUN_WILDCARD, SCB_LIST_NULL, devinfo->role, 4308 status); 4309 4310 #ifdef AHC_TARGET_MODE 4311 /* 4312 * Send an immediate notify ccb to all target mord peripheral 4313 * drivers affected by this action. 4314 */ 4315 tstate = ahc->enabled_targets[devinfo->our_scsiid]; 4316 if (tstate != NULL) { 4317 for (lun = 0; lun < AHC_NUM_LUNS; lun++) { 4318 struct ahc_tmode_lstate* lstate; 4319 4320 lstate = tstate->enabled_luns[lun]; 4321 if (lstate == NULL) 4322 continue; 4323 4324 ahc_queue_lstate_event(ahc, lstate, devinfo->our_scsiid, 4325 TARGET_RESET, /*arg*/0); 4326 ahc_send_lstate_events(ahc, lstate); 4327 } 4328 } 4329 #endif 4330 4331 /* 4332 * Go back to async/narrow transfers and renegotiate. 4333 */ 4334 ahc_set_width(ahc, devinfo, MSG_EXT_WDTR_BUS_8_BIT, 4335 AHC_TRANS_CUR, /*paused*/TRUE); 4336 ahc_set_syncrate(ahc, devinfo, /*syncrate*/NULL, 4337 /*period*/0, /*offset*/0, /*ppr_options*/0, 4338 AHC_TRANS_CUR, /*paused*/TRUE); 4339 4340 if (status != CAM_SEL_TIMEOUT) 4341 ahc_send_async(ahc, devinfo->channel, devinfo->target, 4342 CAM_LUN_WILDCARD, AC_SENT_BDR); 4343 4344 if (message != NULL 4345 && (verbose_level <= bootverbose)) 4346 printk("%s: %s on %c:%d. %d SCBs aborted\n", ahc_name(ahc), 4347 message, devinfo->channel, devinfo->target, found); 4348 } 4349 4350 #ifdef AHC_TARGET_MODE 4351 static void ahc_setup_target_msgin(struct ahc_softc * ahc,struct ahc_devinfo * devinfo,struct scb * scb)4352 ahc_setup_target_msgin(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 4353 struct scb *scb) 4354 { 4355 4356 /* 4357 * To facilitate adding multiple messages together, 4358 * each routine should increment the index and len 4359 * variables instead of setting them explicitly. 4360 */ 4361 ahc->msgout_index = 0; 4362 ahc->msgout_len = 0; 4363 4364 if (scb != NULL && (scb->flags & SCB_AUTO_NEGOTIATE) != 0) 4365 ahc_build_transfer_msg(ahc, devinfo); 4366 else 4367 panic("ahc_intr: AWAITING target message with no message"); 4368 4369 ahc->msgout_index = 0; 4370 ahc->msg_type = MSG_TYPE_TARGET_MSGIN; 4371 } 4372 #endif 4373 /**************************** Initialization **********************************/ 4374 /* 4375 * Allocate a controller structure for a new device 4376 * and perform initial initializion. 4377 */ 4378 struct ahc_softc * ahc_alloc(void * platform_arg,char * name)4379 ahc_alloc(void *platform_arg, char *name) 4380 { 4381 struct ahc_softc *ahc; 4382 int i; 4383 4384 ahc = kzalloc(sizeof(*ahc), GFP_ATOMIC); 4385 if (!ahc) { 4386 printk("aic7xxx: cannot malloc softc!\n"); 4387 kfree(name); 4388 return NULL; 4389 } 4390 4391 ahc->seep_config = kmalloc(sizeof(*ahc->seep_config), GFP_ATOMIC); 4392 if (ahc->seep_config == NULL) { 4393 kfree(ahc); 4394 kfree(name); 4395 return (NULL); 4396 } 4397 LIST_INIT(&ahc->pending_scbs); 4398 /* We don't know our unit number until the OSM sets it */ 4399 ahc->name = name; 4400 ahc->unit = -1; 4401 ahc->description = NULL; 4402 ahc->channel = 'A'; 4403 ahc->channel_b = 'B'; 4404 ahc->chip = AHC_NONE; 4405 ahc->features = AHC_FENONE; 4406 ahc->bugs = AHC_BUGNONE; 4407 ahc->flags = AHC_FNONE; 4408 /* 4409 * Default to all error reporting enabled with the 4410 * sequencer operating at its fastest speed. 4411 * The bus attach code may modify this. 4412 */ 4413 ahc->seqctl = FASTMODE; 4414 4415 for (i = 0; i < AHC_NUM_TARGETS; i++) 4416 TAILQ_INIT(&ahc->untagged_queues[i]); 4417 if (ahc_platform_alloc(ahc, platform_arg) != 0) { 4418 ahc_free(ahc); 4419 ahc = NULL; 4420 } 4421 return (ahc); 4422 } 4423 4424 int ahc_softc_init(struct ahc_softc * ahc)4425 ahc_softc_init(struct ahc_softc *ahc) 4426 { 4427 4428 /* The IRQMS bit is only valid on VL and EISA chips */ 4429 if ((ahc->chip & AHC_PCI) == 0) 4430 ahc->unpause = ahc_inb(ahc, HCNTRL) & IRQMS; 4431 else 4432 ahc->unpause = 0; 4433 ahc->pause = ahc->unpause | PAUSE; 4434 /* XXX The shared scb data stuff should be deprecated */ 4435 if (ahc->scb_data == NULL) { 4436 ahc->scb_data = kzalloc(sizeof(*ahc->scb_data), GFP_ATOMIC); 4437 if (ahc->scb_data == NULL) 4438 return (ENOMEM); 4439 } 4440 4441 return (0); 4442 } 4443 4444 void ahc_set_unit(struct ahc_softc * ahc,int unit)4445 ahc_set_unit(struct ahc_softc *ahc, int unit) 4446 { 4447 ahc->unit = unit; 4448 } 4449 4450 void ahc_set_name(struct ahc_softc * ahc,char * name)4451 ahc_set_name(struct ahc_softc *ahc, char *name) 4452 { 4453 kfree(ahc->name); 4454 ahc->name = name; 4455 } 4456 4457 void ahc_free(struct ahc_softc * ahc)4458 ahc_free(struct ahc_softc *ahc) 4459 { 4460 int i; 4461 4462 switch (ahc->init_level) { 4463 default: 4464 case 5: 4465 ahc_shutdown(ahc); 4466 fallthrough; 4467 case 4: 4468 ahc_dmamap_unload(ahc, ahc->shared_data_dmat, 4469 ahc->shared_data_dmamap); 4470 fallthrough; 4471 case 3: 4472 ahc_dmamem_free(ahc, ahc->shared_data_dmat, ahc->qoutfifo, 4473 ahc->shared_data_dmamap); 4474 ahc_dmamap_destroy(ahc, ahc->shared_data_dmat, 4475 ahc->shared_data_dmamap); 4476 fallthrough; 4477 case 2: 4478 ahc_dma_tag_destroy(ahc, ahc->shared_data_dmat); 4479 fallthrough; 4480 case 1: 4481 break; 4482 case 0: 4483 break; 4484 } 4485 4486 ahc_platform_free(ahc); 4487 ahc_fini_scbdata(ahc); 4488 for (i = 0; i < AHC_NUM_TARGETS; i++) { 4489 struct ahc_tmode_tstate *tstate; 4490 4491 tstate = ahc->enabled_targets[i]; 4492 if (tstate != NULL) { 4493 #ifdef AHC_TARGET_MODE 4494 int j; 4495 4496 for (j = 0; j < AHC_NUM_LUNS; j++) { 4497 struct ahc_tmode_lstate *lstate; 4498 4499 lstate = tstate->enabled_luns[j]; 4500 if (lstate != NULL) { 4501 xpt_free_path(lstate->path); 4502 kfree(lstate); 4503 } 4504 } 4505 #endif 4506 kfree(tstate); 4507 } 4508 } 4509 #ifdef AHC_TARGET_MODE 4510 if (ahc->black_hole != NULL) { 4511 xpt_free_path(ahc->black_hole->path); 4512 kfree(ahc->black_hole); 4513 } 4514 #endif 4515 kfree(ahc->name); 4516 kfree(ahc->seep_config); 4517 kfree(ahc); 4518 return; 4519 } 4520 4521 static void ahc_shutdown(void * arg)4522 ahc_shutdown(void *arg) 4523 { 4524 struct ahc_softc *ahc; 4525 int i; 4526 4527 ahc = (struct ahc_softc *)arg; 4528 4529 /* This will reset most registers to 0, but not all */ 4530 ahc_reset(ahc, /*reinit*/FALSE); 4531 ahc_outb(ahc, SCSISEQ, 0); 4532 ahc_outb(ahc, SXFRCTL0, 0); 4533 ahc_outb(ahc, DSPCISTATUS, 0); 4534 4535 for (i = TARG_SCSIRATE; i < SCSICONF; i++) 4536 ahc_outb(ahc, i, 0); 4537 } 4538 4539 /* 4540 * Reset the controller and record some information about it 4541 * that is only available just after a reset. If "reinit" is 4542 * non-zero, this reset occurred after initial configuration 4543 * and the caller requests that the chip be fully reinitialized 4544 * to a runable state. Chip interrupts are *not* enabled after 4545 * a reinitialization. The caller must enable interrupts via 4546 * ahc_intr_enable(). 4547 */ 4548 int ahc_reset(struct ahc_softc * ahc,int reinit)4549 ahc_reset(struct ahc_softc *ahc, int reinit) 4550 { 4551 u_int sblkctl; 4552 u_int sxfrctl1_a, sxfrctl1_b; 4553 int error; 4554 int wait; 4555 4556 /* 4557 * Preserve the value of the SXFRCTL1 register for all channels. 4558 * It contains settings that affect termination and we don't want 4559 * to disturb the integrity of the bus. 4560 */ 4561 ahc_pause(ahc); 4562 sxfrctl1_b = 0; 4563 if ((ahc->chip & AHC_CHIPID_MASK) == AHC_AIC7770) { 4564 u_int sblkctl; 4565 4566 /* 4567 * Save channel B's settings in case this chip 4568 * is setup for TWIN channel operation. 4569 */ 4570 sblkctl = ahc_inb(ahc, SBLKCTL); 4571 ahc_outb(ahc, SBLKCTL, sblkctl | SELBUSB); 4572 sxfrctl1_b = ahc_inb(ahc, SXFRCTL1); 4573 ahc_outb(ahc, SBLKCTL, sblkctl & ~SELBUSB); 4574 } 4575 sxfrctl1_a = ahc_inb(ahc, SXFRCTL1); 4576 4577 ahc_outb(ahc, HCNTRL, CHIPRST | ahc->pause); 4578 4579 /* 4580 * Ensure that the reset has finished. We delay 1000us 4581 * prior to reading the register to make sure the chip 4582 * has sufficiently completed its reset to handle register 4583 * accesses. 4584 */ 4585 wait = 1000; 4586 do { 4587 ahc_delay(1000); 4588 } while (--wait && !(ahc_inb(ahc, HCNTRL) & CHIPRSTACK)); 4589 4590 if (wait == 0) { 4591 printk("%s: WARNING - Failed chip reset! " 4592 "Trying to initialize anyway.\n", ahc_name(ahc)); 4593 } 4594 ahc_outb(ahc, HCNTRL, ahc->pause); 4595 4596 /* Determine channel configuration */ 4597 sblkctl = ahc_inb(ahc, SBLKCTL) & (SELBUSB|SELWIDE); 4598 /* No Twin Channel PCI cards */ 4599 if ((ahc->chip & AHC_PCI) != 0) 4600 sblkctl &= ~SELBUSB; 4601 switch (sblkctl) { 4602 case 0: 4603 /* Single Narrow Channel */ 4604 break; 4605 case 2: 4606 /* Wide Channel */ 4607 ahc->features |= AHC_WIDE; 4608 break; 4609 case 8: 4610 /* Twin Channel */ 4611 ahc->features |= AHC_TWIN; 4612 break; 4613 default: 4614 printk(" Unsupported adapter type. Ignoring\n"); 4615 return(-1); 4616 } 4617 4618 /* 4619 * Reload sxfrctl1. 4620 * 4621 * We must always initialize STPWEN to 1 before we 4622 * restore the saved values. STPWEN is initialized 4623 * to a tri-state condition which can only be cleared 4624 * by turning it on. 4625 */ 4626 if ((ahc->features & AHC_TWIN) != 0) { 4627 u_int sblkctl; 4628 4629 sblkctl = ahc_inb(ahc, SBLKCTL); 4630 ahc_outb(ahc, SBLKCTL, sblkctl | SELBUSB); 4631 ahc_outb(ahc, SXFRCTL1, sxfrctl1_b); 4632 ahc_outb(ahc, SBLKCTL, sblkctl & ~SELBUSB); 4633 } 4634 ahc_outb(ahc, SXFRCTL1, sxfrctl1_a); 4635 4636 error = 0; 4637 if (reinit != 0) 4638 /* 4639 * If a recovery action has forced a chip reset, 4640 * re-initialize the chip to our liking. 4641 */ 4642 error = ahc->bus_chip_init(ahc); 4643 #ifdef AHC_DUMP_SEQ 4644 else 4645 ahc_dumpseq(ahc); 4646 #endif 4647 4648 return (error); 4649 } 4650 4651 /* 4652 * Determine the number of SCBs available on the controller 4653 */ 4654 int ahc_probe_scbs(struct ahc_softc * ahc)4655 ahc_probe_scbs(struct ahc_softc *ahc) { 4656 int i; 4657 4658 for (i = 0; i < AHC_SCB_MAX; i++) { 4659 4660 ahc_outb(ahc, SCBPTR, i); 4661 ahc_outb(ahc, SCB_BASE, i); 4662 if (ahc_inb(ahc, SCB_BASE) != i) 4663 break; 4664 ahc_outb(ahc, SCBPTR, 0); 4665 if (ahc_inb(ahc, SCB_BASE) != 0) 4666 break; 4667 } 4668 return (i); 4669 } 4670 4671 static void ahc_dmamap_cb(void * arg,bus_dma_segment_t * segs,int nseg,int error)4672 ahc_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 4673 { 4674 dma_addr_t *baddr; 4675 4676 baddr = (dma_addr_t *)arg; 4677 *baddr = segs->ds_addr; 4678 } 4679 4680 static void ahc_build_free_scb_list(struct ahc_softc * ahc)4681 ahc_build_free_scb_list(struct ahc_softc *ahc) 4682 { 4683 int scbsize; 4684 int i; 4685 4686 scbsize = 32; 4687 if ((ahc->flags & AHC_LSCBS_ENABLED) != 0) 4688 scbsize = 64; 4689 4690 for (i = 0; i < ahc->scb_data->maxhscbs; i++) { 4691 int j; 4692 4693 ahc_outb(ahc, SCBPTR, i); 4694 4695 /* 4696 * Touch all SCB bytes to avoid parity errors 4697 * should one of our debugging routines read 4698 * an otherwise uninitiatlized byte. 4699 */ 4700 for (j = 0; j < scbsize; j++) 4701 ahc_outb(ahc, SCB_BASE+j, 0xFF); 4702 4703 /* Clear the control byte. */ 4704 ahc_outb(ahc, SCB_CONTROL, 0); 4705 4706 /* Set the next pointer */ 4707 if ((ahc->flags & AHC_PAGESCBS) != 0) 4708 ahc_outb(ahc, SCB_NEXT, i+1); 4709 else 4710 ahc_outb(ahc, SCB_NEXT, SCB_LIST_NULL); 4711 4712 /* Make the tag number, SCSIID, and lun invalid */ 4713 ahc_outb(ahc, SCB_TAG, SCB_LIST_NULL); 4714 ahc_outb(ahc, SCB_SCSIID, 0xFF); 4715 ahc_outb(ahc, SCB_LUN, 0xFF); 4716 } 4717 4718 if ((ahc->flags & AHC_PAGESCBS) != 0) { 4719 /* SCB 0 heads the free list. */ 4720 ahc_outb(ahc, FREE_SCBH, 0); 4721 } else { 4722 /* No free list. */ 4723 ahc_outb(ahc, FREE_SCBH, SCB_LIST_NULL); 4724 } 4725 4726 /* Make sure that the last SCB terminates the free list */ 4727 ahc_outb(ahc, SCBPTR, i-1); 4728 ahc_outb(ahc, SCB_NEXT, SCB_LIST_NULL); 4729 } 4730 4731 static int ahc_init_scbdata(struct ahc_softc * ahc)4732 ahc_init_scbdata(struct ahc_softc *ahc) 4733 { 4734 struct scb_data *scb_data; 4735 4736 scb_data = ahc->scb_data; 4737 SLIST_INIT(&scb_data->free_scbs); 4738 SLIST_INIT(&scb_data->sg_maps); 4739 4740 /* Allocate SCB resources */ 4741 scb_data->scbarray = kcalloc(AHC_SCB_MAX_ALLOC, sizeof(struct scb), 4742 GFP_ATOMIC); 4743 if (scb_data->scbarray == NULL) 4744 return (ENOMEM); 4745 4746 /* Determine the number of hardware SCBs and initialize them */ 4747 4748 scb_data->maxhscbs = ahc_probe_scbs(ahc); 4749 if (ahc->scb_data->maxhscbs == 0) { 4750 printk("%s: No SCB space found\n", ahc_name(ahc)); 4751 return (ENXIO); 4752 } 4753 4754 /* 4755 * Create our DMA tags. These tags define the kinds of device 4756 * accessible memory allocations and memory mappings we will 4757 * need to perform during normal operation. 4758 * 4759 * Unless we need to further restrict the allocation, we rely 4760 * on the restrictions of the parent dmat, hence the common 4761 * use of MAXADDR and MAXSIZE. 4762 */ 4763 4764 /* DMA tag for our hardware scb structures */ 4765 if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1, 4766 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1, 4767 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, 4768 /*highaddr*/BUS_SPACE_MAXADDR, 4769 /*filter*/NULL, /*filterarg*/NULL, 4770 AHC_SCB_MAX_ALLOC * sizeof(struct hardware_scb), 4771 /*nsegments*/1, 4772 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, 4773 /*flags*/0, &scb_data->hscb_dmat) != 0) { 4774 goto error_exit; 4775 } 4776 4777 scb_data->init_level++; 4778 4779 /* Allocation for our hscbs */ 4780 if (ahc_dmamem_alloc(ahc, scb_data->hscb_dmat, 4781 (void **)&scb_data->hscbs, 4782 BUS_DMA_NOWAIT, &scb_data->hscb_dmamap) != 0) { 4783 goto error_exit; 4784 } 4785 4786 scb_data->init_level++; 4787 4788 /* And permanently map them */ 4789 ahc_dmamap_load(ahc, scb_data->hscb_dmat, scb_data->hscb_dmamap, 4790 scb_data->hscbs, 4791 AHC_SCB_MAX_ALLOC * sizeof(struct hardware_scb), 4792 ahc_dmamap_cb, &scb_data->hscb_busaddr, /*flags*/0); 4793 4794 scb_data->init_level++; 4795 4796 /* DMA tag for our sense buffers */ 4797 if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1, 4798 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1, 4799 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, 4800 /*highaddr*/BUS_SPACE_MAXADDR, 4801 /*filter*/NULL, /*filterarg*/NULL, 4802 AHC_SCB_MAX_ALLOC * sizeof(struct scsi_sense_data), 4803 /*nsegments*/1, 4804 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, 4805 /*flags*/0, &scb_data->sense_dmat) != 0) { 4806 goto error_exit; 4807 } 4808 4809 scb_data->init_level++; 4810 4811 /* Allocate them */ 4812 if (ahc_dmamem_alloc(ahc, scb_data->sense_dmat, 4813 (void **)&scb_data->sense, 4814 BUS_DMA_NOWAIT, &scb_data->sense_dmamap) != 0) { 4815 goto error_exit; 4816 } 4817 4818 scb_data->init_level++; 4819 4820 /* And permanently map them */ 4821 ahc_dmamap_load(ahc, scb_data->sense_dmat, scb_data->sense_dmamap, 4822 scb_data->sense, 4823 AHC_SCB_MAX_ALLOC * sizeof(struct scsi_sense_data), 4824 ahc_dmamap_cb, &scb_data->sense_busaddr, /*flags*/0); 4825 4826 scb_data->init_level++; 4827 4828 /* DMA tag for our S/G structures. We allocate in page sized chunks */ 4829 if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/8, 4830 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1, 4831 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, 4832 /*highaddr*/BUS_SPACE_MAXADDR, 4833 /*filter*/NULL, /*filterarg*/NULL, 4834 PAGE_SIZE, /*nsegments*/1, 4835 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, 4836 /*flags*/0, &scb_data->sg_dmat) != 0) { 4837 goto error_exit; 4838 } 4839 4840 scb_data->init_level++; 4841 4842 /* Perform initial CCB allocation */ 4843 memset(scb_data->hscbs, 0, 4844 AHC_SCB_MAX_ALLOC * sizeof(struct hardware_scb)); 4845 ahc_alloc_scbs(ahc); 4846 4847 if (scb_data->numscbs == 0) { 4848 printk("%s: ahc_init_scbdata - " 4849 "Unable to allocate initial scbs\n", 4850 ahc_name(ahc)); 4851 goto error_exit; 4852 } 4853 4854 /* 4855 * Reserve the next queued SCB. 4856 */ 4857 ahc->next_queued_scb = ahc_get_scb(ahc); 4858 4859 /* 4860 * Note that we were successful 4861 */ 4862 return (0); 4863 4864 error_exit: 4865 4866 return (ENOMEM); 4867 } 4868 4869 static void ahc_fini_scbdata(struct ahc_softc * ahc)4870 ahc_fini_scbdata(struct ahc_softc *ahc) 4871 { 4872 struct scb_data *scb_data; 4873 4874 scb_data = ahc->scb_data; 4875 if (scb_data == NULL) 4876 return; 4877 4878 switch (scb_data->init_level) { 4879 default: 4880 case 7: 4881 { 4882 struct sg_map_node *sg_map; 4883 4884 while ((sg_map = SLIST_FIRST(&scb_data->sg_maps))!= NULL) { 4885 SLIST_REMOVE_HEAD(&scb_data->sg_maps, links); 4886 ahc_dmamap_unload(ahc, scb_data->sg_dmat, 4887 sg_map->sg_dmamap); 4888 ahc_dmamem_free(ahc, scb_data->sg_dmat, 4889 sg_map->sg_vaddr, 4890 sg_map->sg_dmamap); 4891 kfree(sg_map); 4892 } 4893 ahc_dma_tag_destroy(ahc, scb_data->sg_dmat); 4894 } 4895 fallthrough; 4896 case 6: 4897 ahc_dmamap_unload(ahc, scb_data->sense_dmat, 4898 scb_data->sense_dmamap); 4899 fallthrough; 4900 case 5: 4901 ahc_dmamem_free(ahc, scb_data->sense_dmat, scb_data->sense, 4902 scb_data->sense_dmamap); 4903 ahc_dmamap_destroy(ahc, scb_data->sense_dmat, 4904 scb_data->sense_dmamap); 4905 fallthrough; 4906 case 4: 4907 ahc_dma_tag_destroy(ahc, scb_data->sense_dmat); 4908 fallthrough; 4909 case 3: 4910 ahc_dmamap_unload(ahc, scb_data->hscb_dmat, 4911 scb_data->hscb_dmamap); 4912 fallthrough; 4913 case 2: 4914 ahc_dmamem_free(ahc, scb_data->hscb_dmat, scb_data->hscbs, 4915 scb_data->hscb_dmamap); 4916 ahc_dmamap_destroy(ahc, scb_data->hscb_dmat, 4917 scb_data->hscb_dmamap); 4918 fallthrough; 4919 case 1: 4920 ahc_dma_tag_destroy(ahc, scb_data->hscb_dmat); 4921 break; 4922 case 0: 4923 break; 4924 } 4925 kfree(scb_data->scbarray); 4926 } 4927 4928 static void ahc_alloc_scbs(struct ahc_softc * ahc)4929 ahc_alloc_scbs(struct ahc_softc *ahc) 4930 { 4931 struct scb_data *scb_data; 4932 struct scb *next_scb; 4933 struct sg_map_node *sg_map; 4934 dma_addr_t physaddr; 4935 struct ahc_dma_seg *segs; 4936 int newcount; 4937 int i; 4938 4939 scb_data = ahc->scb_data; 4940 if (scb_data->numscbs >= AHC_SCB_MAX_ALLOC) 4941 /* Can't allocate any more */ 4942 return; 4943 4944 next_scb = &scb_data->scbarray[scb_data->numscbs]; 4945 4946 sg_map = kmalloc(sizeof(*sg_map), GFP_ATOMIC); 4947 4948 if (sg_map == NULL) 4949 return; 4950 4951 /* Allocate S/G space for the next batch of SCBS */ 4952 if (ahc_dmamem_alloc(ahc, scb_data->sg_dmat, 4953 (void **)&sg_map->sg_vaddr, 4954 BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) { 4955 kfree(sg_map); 4956 return; 4957 } 4958 4959 SLIST_INSERT_HEAD(&scb_data->sg_maps, sg_map, links); 4960 4961 ahc_dmamap_load(ahc, scb_data->sg_dmat, sg_map->sg_dmamap, 4962 sg_map->sg_vaddr, PAGE_SIZE, ahc_dmamap_cb, 4963 &sg_map->sg_physaddr, /*flags*/0); 4964 4965 segs = sg_map->sg_vaddr; 4966 physaddr = sg_map->sg_physaddr; 4967 4968 newcount = (PAGE_SIZE / (AHC_NSEG * sizeof(struct ahc_dma_seg))); 4969 newcount = min(newcount, (AHC_SCB_MAX_ALLOC - scb_data->numscbs)); 4970 for (i = 0; i < newcount; i++) { 4971 struct scb_platform_data *pdata; 4972 4973 pdata = kmalloc(sizeof(*pdata), GFP_ATOMIC); 4974 if (pdata == NULL) 4975 break; 4976 next_scb->platform_data = pdata; 4977 next_scb->sg_map = sg_map; 4978 next_scb->sg_list = segs; 4979 /* 4980 * The sequencer always starts with the second entry. 4981 * The first entry is embedded in the scb. 4982 */ 4983 next_scb->sg_list_phys = physaddr + sizeof(struct ahc_dma_seg); 4984 next_scb->ahc_softc = ahc; 4985 next_scb->flags = SCB_FREE; 4986 next_scb->hscb = &scb_data->hscbs[scb_data->numscbs]; 4987 next_scb->hscb->tag = ahc->scb_data->numscbs; 4988 SLIST_INSERT_HEAD(&ahc->scb_data->free_scbs, 4989 next_scb, links.sle); 4990 segs += AHC_NSEG; 4991 physaddr += (AHC_NSEG * sizeof(struct ahc_dma_seg)); 4992 next_scb++; 4993 ahc->scb_data->numscbs++; 4994 } 4995 } 4996 4997 void ahc_controller_info(struct ahc_softc * ahc,char * buf)4998 ahc_controller_info(struct ahc_softc *ahc, char *buf) 4999 { 5000 int len; 5001 5002 len = sprintf(buf, "%s: ", ahc_chip_names[ahc->chip & AHC_CHIPID_MASK]); 5003 buf += len; 5004 if ((ahc->features & AHC_TWIN) != 0) 5005 len = sprintf(buf, "Twin Channel, A SCSI Id=%d, " 5006 "B SCSI Id=%d, primary %c, ", 5007 ahc->our_id, ahc->our_id_b, 5008 (ahc->flags & AHC_PRIMARY_CHANNEL) + 'A'); 5009 else { 5010 const char *speed; 5011 const char *type; 5012 5013 speed = ""; 5014 if ((ahc->features & AHC_ULTRA) != 0) { 5015 speed = "Ultra "; 5016 } else if ((ahc->features & AHC_DT) != 0) { 5017 speed = "Ultra160 "; 5018 } else if ((ahc->features & AHC_ULTRA2) != 0) { 5019 speed = "Ultra2 "; 5020 } 5021 if ((ahc->features & AHC_WIDE) != 0) { 5022 type = "Wide"; 5023 } else { 5024 type = "Single"; 5025 } 5026 len = sprintf(buf, "%s%s Channel %c, SCSI Id=%d, ", 5027 speed, type, ahc->channel, ahc->our_id); 5028 } 5029 buf += len; 5030 5031 if ((ahc->flags & AHC_PAGESCBS) != 0) 5032 sprintf(buf, "%d/%d SCBs", 5033 ahc->scb_data->maxhscbs, AHC_MAX_QUEUE); 5034 else 5035 sprintf(buf, "%d SCBs", ahc->scb_data->maxhscbs); 5036 } 5037 5038 int ahc_chip_init(struct ahc_softc * ahc)5039 ahc_chip_init(struct ahc_softc *ahc) 5040 { 5041 int term; 5042 int error; 5043 u_int i; 5044 u_int scsi_conf; 5045 u_int scsiseq_template; 5046 uint32_t physaddr; 5047 5048 ahc_outb(ahc, SEQ_FLAGS, 0); 5049 ahc_outb(ahc, SEQ_FLAGS2, 0); 5050 5051 /* Set the SCSI Id, SXFRCTL0, SXFRCTL1, and SIMODE1, for both channels*/ 5052 if (ahc->features & AHC_TWIN) { 5053 5054 /* 5055 * Setup Channel B first. 5056 */ 5057 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) | SELBUSB); 5058 term = (ahc->flags & AHC_TERM_ENB_B) != 0 ? STPWEN : 0; 5059 ahc_outb(ahc, SCSIID, ahc->our_id_b); 5060 scsi_conf = ahc_inb(ahc, SCSICONF + 1); 5061 ahc_outb(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL)) 5062 |term|ahc->seltime_b|ENSTIMER|ACTNEGEN); 5063 if ((ahc->features & AHC_ULTRA2) != 0) 5064 ahc_outb(ahc, SIMODE0, ahc_inb(ahc, SIMODE0)|ENIOERR); 5065 ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR); 5066 ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN); 5067 5068 /* Select Channel A */ 5069 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~SELBUSB); 5070 } 5071 term = (ahc->flags & AHC_TERM_ENB_A) != 0 ? STPWEN : 0; 5072 if ((ahc->features & AHC_ULTRA2) != 0) 5073 ahc_outb(ahc, SCSIID_ULTRA2, ahc->our_id); 5074 else 5075 ahc_outb(ahc, SCSIID, ahc->our_id); 5076 scsi_conf = ahc_inb(ahc, SCSICONF); 5077 ahc_outb(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL)) 5078 |term|ahc->seltime 5079 |ENSTIMER|ACTNEGEN); 5080 if ((ahc->features & AHC_ULTRA2) != 0) 5081 ahc_outb(ahc, SIMODE0, ahc_inb(ahc, SIMODE0)|ENIOERR); 5082 ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR); 5083 ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN); 5084 5085 /* There are no untagged SCBs active yet. */ 5086 for (i = 0; i < 16; i++) { 5087 ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, 0)); 5088 if ((ahc->flags & AHC_SCB_BTT) != 0) { 5089 int lun; 5090 5091 /* 5092 * The SCB based BTT allows an entry per 5093 * target and lun pair. 5094 */ 5095 for (lun = 1; lun < AHC_NUM_LUNS; lun++) 5096 ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, lun)); 5097 } 5098 } 5099 5100 /* All of our queues are empty */ 5101 for (i = 0; i < 256; i++) 5102 ahc->qoutfifo[i] = SCB_LIST_NULL; 5103 ahc_sync_qoutfifo(ahc, BUS_DMASYNC_PREREAD); 5104 5105 for (i = 0; i < 256; i++) 5106 ahc->qinfifo[i] = SCB_LIST_NULL; 5107 5108 if ((ahc->features & AHC_MULTI_TID) != 0) { 5109 ahc_outb(ahc, TARGID, 0); 5110 ahc_outb(ahc, TARGID + 1, 0); 5111 } 5112 5113 /* 5114 * Tell the sequencer where it can find our arrays in memory. 5115 */ 5116 physaddr = ahc->scb_data->hscb_busaddr; 5117 ahc_outb(ahc, HSCB_ADDR, physaddr & 0xFF); 5118 ahc_outb(ahc, HSCB_ADDR + 1, (physaddr >> 8) & 0xFF); 5119 ahc_outb(ahc, HSCB_ADDR + 2, (physaddr >> 16) & 0xFF); 5120 ahc_outb(ahc, HSCB_ADDR + 3, (physaddr >> 24) & 0xFF); 5121 5122 physaddr = ahc->shared_data_busaddr; 5123 ahc_outb(ahc, SHARED_DATA_ADDR, physaddr & 0xFF); 5124 ahc_outb(ahc, SHARED_DATA_ADDR + 1, (physaddr >> 8) & 0xFF); 5125 ahc_outb(ahc, SHARED_DATA_ADDR + 2, (physaddr >> 16) & 0xFF); 5126 ahc_outb(ahc, SHARED_DATA_ADDR + 3, (physaddr >> 24) & 0xFF); 5127 5128 /* 5129 * Initialize the group code to command length table. 5130 * This overrides the values in TARG_SCSIRATE, so only 5131 * setup the table after we have processed that information. 5132 */ 5133 ahc_outb(ahc, CMDSIZE_TABLE, 5); 5134 ahc_outb(ahc, CMDSIZE_TABLE + 1, 9); 5135 ahc_outb(ahc, CMDSIZE_TABLE + 2, 9); 5136 ahc_outb(ahc, CMDSIZE_TABLE + 3, 0); 5137 ahc_outb(ahc, CMDSIZE_TABLE + 4, 15); 5138 ahc_outb(ahc, CMDSIZE_TABLE + 5, 11); 5139 ahc_outb(ahc, CMDSIZE_TABLE + 6, 0); 5140 ahc_outb(ahc, CMDSIZE_TABLE + 7, 0); 5141 5142 if ((ahc->features & AHC_HS_MAILBOX) != 0) 5143 ahc_outb(ahc, HS_MAILBOX, 0); 5144 5145 /* Tell the sequencer of our initial queue positions */ 5146 if ((ahc->features & AHC_TARGETMODE) != 0) { 5147 ahc->tqinfifonext = 1; 5148 ahc_outb(ahc, KERNEL_TQINPOS, ahc->tqinfifonext - 1); 5149 ahc_outb(ahc, TQINPOS, ahc->tqinfifonext); 5150 } 5151 ahc->qinfifonext = 0; 5152 ahc->qoutfifonext = 0; 5153 if ((ahc->features & AHC_QUEUE_REGS) != 0) { 5154 ahc_outb(ahc, QOFF_CTLSTA, SCB_QSIZE_256); 5155 ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext); 5156 ahc_outb(ahc, SNSCB_QOFF, ahc->qinfifonext); 5157 ahc_outb(ahc, SDSCB_QOFF, 0); 5158 } else { 5159 ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext); 5160 ahc_outb(ahc, QINPOS, ahc->qinfifonext); 5161 ahc_outb(ahc, QOUTPOS, ahc->qoutfifonext); 5162 } 5163 5164 /* We don't have any waiting selections */ 5165 ahc_outb(ahc, WAITING_SCBH, SCB_LIST_NULL); 5166 5167 /* Our disconnection list is empty too */ 5168 ahc_outb(ahc, DISCONNECTED_SCBH, SCB_LIST_NULL); 5169 5170 /* Message out buffer starts empty */ 5171 ahc_outb(ahc, MSG_OUT, NOP); 5172 5173 /* 5174 * Setup the allowed SCSI Sequences based on operational mode. 5175 * If we are a target, we'll enable select in operations once 5176 * we've had a lun enabled. 5177 */ 5178 scsiseq_template = ENSELO|ENAUTOATNO|ENAUTOATNP; 5179 if ((ahc->flags & AHC_INITIATORROLE) != 0) 5180 scsiseq_template |= ENRSELI; 5181 ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq_template); 5182 5183 /* Initialize our list of free SCBs. */ 5184 ahc_build_free_scb_list(ahc); 5185 5186 /* 5187 * Tell the sequencer which SCB will be the next one it receives. 5188 */ 5189 ahc_outb(ahc, NEXT_QUEUED_SCB, ahc->next_queued_scb->hscb->tag); 5190 5191 /* 5192 * Load the Sequencer program and Enable the adapter 5193 * in "fast" mode. 5194 */ 5195 if (bootverbose) 5196 printk("%s: Downloading Sequencer Program...", 5197 ahc_name(ahc)); 5198 5199 error = ahc_loadseq(ahc); 5200 if (error != 0) 5201 return (error); 5202 5203 if ((ahc->features & AHC_ULTRA2) != 0) { 5204 int wait; 5205 5206 /* 5207 * Wait for up to 500ms for our transceivers 5208 * to settle. If the adapter does not have 5209 * a cable attached, the transceivers may 5210 * never settle, so don't complain if we 5211 * fail here. 5212 */ 5213 for (wait = 5000; 5214 (ahc_inb(ahc, SBLKCTL) & (ENAB40|ENAB20)) == 0 && wait; 5215 wait--) 5216 ahc_delay(100); 5217 } 5218 ahc_restart(ahc); 5219 return (0); 5220 } 5221 5222 /* 5223 * Start the board, ready for normal operation 5224 */ 5225 int ahc_init(struct ahc_softc * ahc)5226 ahc_init(struct ahc_softc *ahc) 5227 { 5228 int max_targ; 5229 u_int i; 5230 u_int scsi_conf; 5231 u_int ultraenb; 5232 u_int discenable; 5233 u_int tagenable; 5234 size_t driver_data_size; 5235 5236 #ifdef AHC_DEBUG 5237 if ((ahc_debug & AHC_DEBUG_SEQUENCER) != 0) 5238 ahc->flags |= AHC_SEQUENCER_DEBUG; 5239 #endif 5240 5241 #ifdef AHC_PRINT_SRAM 5242 printk("Scratch Ram:"); 5243 for (i = 0x20; i < 0x5f; i++) { 5244 if (((i % 8) == 0) && (i != 0)) { 5245 printk ("\n "); 5246 } 5247 printk (" 0x%x", ahc_inb(ahc, i)); 5248 } 5249 if ((ahc->features & AHC_MORE_SRAM) != 0) { 5250 for (i = 0x70; i < 0x7f; i++) { 5251 if (((i % 8) == 0) && (i != 0)) { 5252 printk ("\n "); 5253 } 5254 printk (" 0x%x", ahc_inb(ahc, i)); 5255 } 5256 } 5257 printk ("\n"); 5258 /* 5259 * Reading uninitialized scratch ram may 5260 * generate parity errors. 5261 */ 5262 ahc_outb(ahc, CLRINT, CLRPARERR); 5263 ahc_outb(ahc, CLRINT, CLRBRKADRINT); 5264 #endif 5265 max_targ = 15; 5266 5267 /* 5268 * Assume we have a board at this stage and it has been reset. 5269 */ 5270 if ((ahc->flags & AHC_USEDEFAULTS) != 0) 5271 ahc->our_id = ahc->our_id_b = 7; 5272 5273 /* 5274 * Default to allowing initiator operations. 5275 */ 5276 ahc->flags |= AHC_INITIATORROLE; 5277 5278 /* 5279 * Only allow target mode features if this unit has them enabled. 5280 */ 5281 if ((AHC_TMODE_ENABLE & (0x1 << ahc->unit)) == 0) 5282 ahc->features &= ~AHC_TARGETMODE; 5283 5284 ahc->init_level++; 5285 5286 /* 5287 * DMA tag for our command fifos and other data in system memory 5288 * the card's sequencer must be able to access. For initiator 5289 * roles, we need to allocate space for the qinfifo and qoutfifo. 5290 * The qinfifo and qoutfifo are composed of 256 1 byte elements. 5291 * When providing for the target mode role, we must additionally 5292 * provide space for the incoming target command fifo and an extra 5293 * byte to deal with a dma bug in some chip versions. 5294 */ 5295 driver_data_size = 2 * 256 * sizeof(uint8_t); 5296 if ((ahc->features & AHC_TARGETMODE) != 0) 5297 driver_data_size += AHC_TMODE_CMDS * sizeof(struct target_cmd) 5298 + /*DMA WideOdd Bug Buffer*/1; 5299 if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1, 5300 /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1, 5301 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, 5302 /*highaddr*/BUS_SPACE_MAXADDR, 5303 /*filter*/NULL, /*filterarg*/NULL, 5304 driver_data_size, 5305 /*nsegments*/1, 5306 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, 5307 /*flags*/0, &ahc->shared_data_dmat) != 0) { 5308 return (ENOMEM); 5309 } 5310 5311 ahc->init_level++; 5312 5313 /* Allocation of driver data */ 5314 if (ahc_dmamem_alloc(ahc, ahc->shared_data_dmat, 5315 (void **)&ahc->qoutfifo, 5316 BUS_DMA_NOWAIT, &ahc->shared_data_dmamap) != 0) { 5317 return (ENOMEM); 5318 } 5319 5320 ahc->init_level++; 5321 5322 /* And permanently map it in */ 5323 ahc_dmamap_load(ahc, ahc->shared_data_dmat, ahc->shared_data_dmamap, 5324 ahc->qoutfifo, driver_data_size, ahc_dmamap_cb, 5325 &ahc->shared_data_busaddr, /*flags*/0); 5326 5327 if ((ahc->features & AHC_TARGETMODE) != 0) { 5328 ahc->targetcmds = (struct target_cmd *)ahc->qoutfifo; 5329 ahc->qoutfifo = (uint8_t *)&ahc->targetcmds[AHC_TMODE_CMDS]; 5330 ahc->dma_bug_buf = ahc->shared_data_busaddr 5331 + driver_data_size - 1; 5332 /* All target command blocks start out invalid. */ 5333 for (i = 0; i < AHC_TMODE_CMDS; i++) 5334 ahc->targetcmds[i].cmd_valid = 0; 5335 ahc_sync_tqinfifo(ahc, BUS_DMASYNC_PREREAD); 5336 ahc->qoutfifo = (uint8_t *)&ahc->targetcmds[256]; 5337 } 5338 ahc->qinfifo = &ahc->qoutfifo[256]; 5339 5340 ahc->init_level++; 5341 5342 /* Allocate SCB data now that buffer_dmat is initialized */ 5343 if (ahc->scb_data->maxhscbs == 0) 5344 if (ahc_init_scbdata(ahc) != 0) 5345 return (ENOMEM); 5346 5347 /* 5348 * Allocate a tstate to house information for our 5349 * initiator presence on the bus as well as the user 5350 * data for any target mode initiator. 5351 */ 5352 if (ahc_alloc_tstate(ahc, ahc->our_id, 'A') == NULL) { 5353 printk("%s: unable to allocate ahc_tmode_tstate. " 5354 "Failing attach\n", ahc_name(ahc)); 5355 return (ENOMEM); 5356 } 5357 5358 if ((ahc->features & AHC_TWIN) != 0) { 5359 if (ahc_alloc_tstate(ahc, ahc->our_id_b, 'B') == NULL) { 5360 printk("%s: unable to allocate ahc_tmode_tstate. " 5361 "Failing attach\n", ahc_name(ahc)); 5362 return (ENOMEM); 5363 } 5364 } 5365 5366 if (ahc->scb_data->maxhscbs < AHC_SCB_MAX_ALLOC) { 5367 ahc->flags |= AHC_PAGESCBS; 5368 } else { 5369 ahc->flags &= ~AHC_PAGESCBS; 5370 } 5371 5372 #ifdef AHC_DEBUG 5373 if (ahc_debug & AHC_SHOW_MISC) { 5374 printk("%s: hardware scb %u bytes; kernel scb %u bytes; " 5375 "ahc_dma %u bytes\n", 5376 ahc_name(ahc), 5377 (u_int)sizeof(struct hardware_scb), 5378 (u_int)sizeof(struct scb), 5379 (u_int)sizeof(struct ahc_dma_seg)); 5380 } 5381 #endif /* AHC_DEBUG */ 5382 5383 /* 5384 * Look at the information that board initialization or 5385 * the board bios has left us. 5386 */ 5387 if (ahc->features & AHC_TWIN) { 5388 scsi_conf = ahc_inb(ahc, SCSICONF + 1); 5389 if ((scsi_conf & RESET_SCSI) != 0 5390 && (ahc->flags & AHC_INITIATORROLE) != 0) 5391 ahc->flags |= AHC_RESET_BUS_B; 5392 } 5393 5394 scsi_conf = ahc_inb(ahc, SCSICONF); 5395 if ((scsi_conf & RESET_SCSI) != 0 5396 && (ahc->flags & AHC_INITIATORROLE) != 0) 5397 ahc->flags |= AHC_RESET_BUS_A; 5398 5399 ultraenb = 0; 5400 tagenable = ALL_TARGETS_MASK; 5401 5402 /* Grab the disconnection disable table and invert it for our needs */ 5403 if ((ahc->flags & AHC_USEDEFAULTS) != 0) { 5404 printk("%s: Host Adapter Bios disabled. Using default SCSI " 5405 "device parameters\n", ahc_name(ahc)); 5406 ahc->flags |= AHC_EXTENDED_TRANS_A|AHC_EXTENDED_TRANS_B| 5407 AHC_TERM_ENB_A|AHC_TERM_ENB_B; 5408 discenable = ALL_TARGETS_MASK; 5409 if ((ahc->features & AHC_ULTRA) != 0) 5410 ultraenb = ALL_TARGETS_MASK; 5411 } else { 5412 discenable = ~((ahc_inb(ahc, DISC_DSB + 1) << 8) 5413 | ahc_inb(ahc, DISC_DSB)); 5414 if ((ahc->features & (AHC_ULTRA|AHC_ULTRA2)) != 0) 5415 ultraenb = (ahc_inb(ahc, ULTRA_ENB + 1) << 8) 5416 | ahc_inb(ahc, ULTRA_ENB); 5417 } 5418 5419 if ((ahc->features & (AHC_WIDE|AHC_TWIN)) == 0) 5420 max_targ = 7; 5421 5422 for (i = 0; i <= max_targ; i++) { 5423 struct ahc_initiator_tinfo *tinfo; 5424 struct ahc_tmode_tstate *tstate; 5425 u_int our_id; 5426 u_int target_id; 5427 char channel; 5428 5429 channel = 'A'; 5430 our_id = ahc->our_id; 5431 target_id = i; 5432 if (i > 7 && (ahc->features & AHC_TWIN) != 0) { 5433 channel = 'B'; 5434 our_id = ahc->our_id_b; 5435 target_id = i % 8; 5436 } 5437 tinfo = ahc_fetch_transinfo(ahc, channel, our_id, 5438 target_id, &tstate); 5439 /* Default to async narrow across the board */ 5440 memset(tinfo, 0, sizeof(*tinfo)); 5441 if (ahc->flags & AHC_USEDEFAULTS) { 5442 if ((ahc->features & AHC_WIDE) != 0) 5443 tinfo->user.width = MSG_EXT_WDTR_BUS_16_BIT; 5444 5445 /* 5446 * These will be truncated when we determine the 5447 * connection type we have with the target. 5448 */ 5449 tinfo->user.period = ahc_syncrates->period; 5450 tinfo->user.offset = MAX_OFFSET; 5451 } else { 5452 u_int scsirate; 5453 uint16_t mask; 5454 5455 /* Take the settings leftover in scratch RAM. */ 5456 scsirate = ahc_inb(ahc, TARG_SCSIRATE + i); 5457 mask = (0x01 << i); 5458 if ((ahc->features & AHC_ULTRA2) != 0) { 5459 u_int offset; 5460 u_int maxsync; 5461 5462 if ((scsirate & SOFS) == 0x0F) { 5463 /* 5464 * Haven't negotiated yet, 5465 * so the format is different. 5466 */ 5467 scsirate = (scsirate & SXFR) >> 4 5468 | (ultraenb & mask) 5469 ? 0x08 : 0x0 5470 | (scsirate & WIDEXFER); 5471 offset = MAX_OFFSET_ULTRA2; 5472 } else 5473 offset = ahc_inb(ahc, TARG_OFFSET + i); 5474 if ((scsirate & ~WIDEXFER) == 0 && offset != 0) 5475 /* Set to the lowest sync rate, 5MHz */ 5476 scsirate |= 0x1c; 5477 maxsync = AHC_SYNCRATE_ULTRA2; 5478 if ((ahc->features & AHC_DT) != 0) 5479 maxsync = AHC_SYNCRATE_DT; 5480 tinfo->user.period = 5481 ahc_find_period(ahc, scsirate, maxsync); 5482 if (offset == 0) 5483 tinfo->user.period = 0; 5484 else 5485 tinfo->user.offset = MAX_OFFSET; 5486 if ((scsirate & SXFR_ULTRA2) <= 8/*10MHz*/ 5487 && (ahc->features & AHC_DT) != 0) 5488 tinfo->user.ppr_options = 5489 MSG_EXT_PPR_DT_REQ; 5490 } else if ((scsirate & SOFS) != 0) { 5491 if ((scsirate & SXFR) == 0x40 5492 && (ultraenb & mask) != 0) { 5493 /* Treat 10MHz as a non-ultra speed */ 5494 scsirate &= ~SXFR; 5495 ultraenb &= ~mask; 5496 } 5497 tinfo->user.period = 5498 ahc_find_period(ahc, scsirate, 5499 (ultraenb & mask) 5500 ? AHC_SYNCRATE_ULTRA 5501 : AHC_SYNCRATE_FAST); 5502 if (tinfo->user.period != 0) 5503 tinfo->user.offset = MAX_OFFSET; 5504 } 5505 if (tinfo->user.period == 0) 5506 tinfo->user.offset = 0; 5507 if ((scsirate & WIDEXFER) != 0 5508 && (ahc->features & AHC_WIDE) != 0) 5509 tinfo->user.width = MSG_EXT_WDTR_BUS_16_BIT; 5510 tinfo->user.protocol_version = 4; 5511 if ((ahc->features & AHC_DT) != 0) 5512 tinfo->user.transport_version = 3; 5513 else 5514 tinfo->user.transport_version = 2; 5515 tinfo->goal.protocol_version = 2; 5516 tinfo->goal.transport_version = 2; 5517 tinfo->curr.protocol_version = 2; 5518 tinfo->curr.transport_version = 2; 5519 } 5520 tstate->ultraenb = 0; 5521 } 5522 ahc->user_discenable = discenable; 5523 ahc->user_tagenable = tagenable; 5524 5525 return (ahc->bus_chip_init(ahc)); 5526 } 5527 5528 void ahc_intr_enable(struct ahc_softc * ahc,int enable)5529 ahc_intr_enable(struct ahc_softc *ahc, int enable) 5530 { 5531 u_int hcntrl; 5532 5533 hcntrl = ahc_inb(ahc, HCNTRL); 5534 hcntrl &= ~INTEN; 5535 ahc->pause &= ~INTEN; 5536 ahc->unpause &= ~INTEN; 5537 if (enable) { 5538 hcntrl |= INTEN; 5539 ahc->pause |= INTEN; 5540 ahc->unpause |= INTEN; 5541 } 5542 ahc_outb(ahc, HCNTRL, hcntrl); 5543 } 5544 5545 /* 5546 * Ensure that the card is paused in a location 5547 * outside of all critical sections and that all 5548 * pending work is completed prior to returning. 5549 * This routine should only be called from outside 5550 * an interrupt context. 5551 */ 5552 void ahc_pause_and_flushwork(struct ahc_softc * ahc)5553 ahc_pause_and_flushwork(struct ahc_softc *ahc) 5554 { 5555 int intstat; 5556 int maxloops; 5557 int paused; 5558 5559 maxloops = 1000; 5560 ahc->flags |= AHC_ALL_INTERRUPTS; 5561 paused = FALSE; 5562 do { 5563 if (paused) { 5564 ahc_unpause(ahc); 5565 /* 5566 * Give the sequencer some time to service 5567 * any active selections. 5568 */ 5569 ahc_delay(500); 5570 } 5571 ahc_intr(ahc); 5572 ahc_pause(ahc); 5573 paused = TRUE; 5574 ahc_outb(ahc, SCSISEQ, ahc_inb(ahc, SCSISEQ) & ~ENSELO); 5575 intstat = ahc_inb(ahc, INTSTAT); 5576 if ((intstat & INT_PEND) == 0) { 5577 ahc_clear_critical_section(ahc); 5578 intstat = ahc_inb(ahc, INTSTAT); 5579 } 5580 } while (--maxloops 5581 && (intstat != 0xFF || (ahc->features & AHC_REMOVABLE) == 0) 5582 && ((intstat & INT_PEND) != 0 5583 || (ahc_inb(ahc, SSTAT0) & (SELDO|SELINGO)) != 0)); 5584 if (maxloops == 0) { 5585 printk("Infinite interrupt loop, INTSTAT = %x", 5586 ahc_inb(ahc, INTSTAT)); 5587 } 5588 ahc_platform_flushwork(ahc); 5589 ahc->flags &= ~AHC_ALL_INTERRUPTS; 5590 } 5591 5592 int __maybe_unused ahc_suspend(struct ahc_softc * ahc)5593 ahc_suspend(struct ahc_softc *ahc) 5594 { 5595 5596 ahc_pause_and_flushwork(ahc); 5597 5598 if (LIST_FIRST(&ahc->pending_scbs) != NULL) { 5599 ahc_unpause(ahc); 5600 return (EBUSY); 5601 } 5602 5603 #ifdef AHC_TARGET_MODE 5604 /* 5605 * XXX What about ATIOs that have not yet been serviced? 5606 * Perhaps we should just refuse to be suspended if we 5607 * are acting in a target role. 5608 */ 5609 if (ahc->pending_device != NULL) { 5610 ahc_unpause(ahc); 5611 return (EBUSY); 5612 } 5613 #endif 5614 ahc_shutdown(ahc); 5615 return (0); 5616 } 5617 5618 int __maybe_unused ahc_resume(struct ahc_softc * ahc)5619 ahc_resume(struct ahc_softc *ahc) 5620 { 5621 5622 ahc_reset(ahc, /*reinit*/TRUE); 5623 ahc_intr_enable(ahc, TRUE); 5624 ahc_restart(ahc); 5625 return (0); 5626 } 5627 /************************** Busy Target Table *********************************/ 5628 /* 5629 * Return the untagged transaction id for a given target/channel lun. 5630 * Optionally, clear the entry. 5631 */ 5632 static u_int ahc_index_busy_tcl(struct ahc_softc * ahc,u_int tcl)5633 ahc_index_busy_tcl(struct ahc_softc *ahc, u_int tcl) 5634 { 5635 u_int scbid; 5636 u_int target_offset; 5637 5638 if ((ahc->flags & AHC_SCB_BTT) != 0) { 5639 u_int saved_scbptr; 5640 5641 saved_scbptr = ahc_inb(ahc, SCBPTR); 5642 ahc_outb(ahc, SCBPTR, TCL_LUN(tcl)); 5643 scbid = ahc_inb(ahc, SCB_64_BTT + TCL_TARGET_OFFSET(tcl)); 5644 ahc_outb(ahc, SCBPTR, saved_scbptr); 5645 } else { 5646 target_offset = TCL_TARGET_OFFSET(tcl); 5647 scbid = ahc_inb(ahc, BUSY_TARGETS + target_offset); 5648 } 5649 5650 return (scbid); 5651 } 5652 5653 static void ahc_unbusy_tcl(struct ahc_softc * ahc,u_int tcl)5654 ahc_unbusy_tcl(struct ahc_softc *ahc, u_int tcl) 5655 { 5656 u_int target_offset; 5657 5658 if ((ahc->flags & AHC_SCB_BTT) != 0) { 5659 u_int saved_scbptr; 5660 5661 saved_scbptr = ahc_inb(ahc, SCBPTR); 5662 ahc_outb(ahc, SCBPTR, TCL_LUN(tcl)); 5663 ahc_outb(ahc, SCB_64_BTT+TCL_TARGET_OFFSET(tcl), SCB_LIST_NULL); 5664 ahc_outb(ahc, SCBPTR, saved_scbptr); 5665 } else { 5666 target_offset = TCL_TARGET_OFFSET(tcl); 5667 ahc_outb(ahc, BUSY_TARGETS + target_offset, SCB_LIST_NULL); 5668 } 5669 } 5670 5671 static void ahc_busy_tcl(struct ahc_softc * ahc,u_int tcl,u_int scbid)5672 ahc_busy_tcl(struct ahc_softc *ahc, u_int tcl, u_int scbid) 5673 { 5674 u_int target_offset; 5675 5676 if ((ahc->flags & AHC_SCB_BTT) != 0) { 5677 u_int saved_scbptr; 5678 5679 saved_scbptr = ahc_inb(ahc, SCBPTR); 5680 ahc_outb(ahc, SCBPTR, TCL_LUN(tcl)); 5681 ahc_outb(ahc, SCB_64_BTT + TCL_TARGET_OFFSET(tcl), scbid); 5682 ahc_outb(ahc, SCBPTR, saved_scbptr); 5683 } else { 5684 target_offset = TCL_TARGET_OFFSET(tcl); 5685 ahc_outb(ahc, BUSY_TARGETS + target_offset, scbid); 5686 } 5687 } 5688 5689 /************************** SCB and SCB queue management **********************/ 5690 int ahc_match_scb(struct ahc_softc * ahc,struct scb * scb,int target,char channel,int lun,u_int tag,role_t role)5691 ahc_match_scb(struct ahc_softc *ahc, struct scb *scb, int target, 5692 char channel, int lun, u_int tag, role_t role) 5693 { 5694 int targ = SCB_GET_TARGET(ahc, scb); 5695 char chan = SCB_GET_CHANNEL(ahc, scb); 5696 int slun = SCB_GET_LUN(scb); 5697 int match; 5698 5699 match = ((chan == channel) || (channel == ALL_CHANNELS)); 5700 if (match != 0) 5701 match = ((targ == target) || (target == CAM_TARGET_WILDCARD)); 5702 if (match != 0) 5703 match = ((lun == slun) || (lun == CAM_LUN_WILDCARD)); 5704 if (match != 0) { 5705 #ifdef AHC_TARGET_MODE 5706 int group; 5707 5708 group = XPT_FC_GROUP(scb->io_ctx->ccb_h.func_code); 5709 if (role == ROLE_INITIATOR) { 5710 match = (group != XPT_FC_GROUP_TMODE) 5711 && ((tag == scb->hscb->tag) 5712 || (tag == SCB_LIST_NULL)); 5713 } else if (role == ROLE_TARGET) { 5714 match = (group == XPT_FC_GROUP_TMODE) 5715 && ((tag == scb->io_ctx->csio.tag_id) 5716 || (tag == SCB_LIST_NULL)); 5717 } 5718 #else /* !AHC_TARGET_MODE */ 5719 match = ((tag == scb->hscb->tag) || (tag == SCB_LIST_NULL)); 5720 #endif /* AHC_TARGET_MODE */ 5721 } 5722 5723 return match; 5724 } 5725 5726 static void ahc_freeze_devq(struct ahc_softc * ahc,struct scb * scb)5727 ahc_freeze_devq(struct ahc_softc *ahc, struct scb *scb) 5728 { 5729 int target; 5730 char channel; 5731 int lun; 5732 5733 target = SCB_GET_TARGET(ahc, scb); 5734 lun = SCB_GET_LUN(scb); 5735 channel = SCB_GET_CHANNEL(ahc, scb); 5736 5737 ahc_search_qinfifo(ahc, target, channel, lun, 5738 /*tag*/SCB_LIST_NULL, ROLE_UNKNOWN, 5739 CAM_REQUEUE_REQ, SEARCH_COMPLETE); 5740 5741 ahc_platform_freeze_devq(ahc, scb); 5742 } 5743 5744 void ahc_qinfifo_requeue_tail(struct ahc_softc * ahc,struct scb * scb)5745 ahc_qinfifo_requeue_tail(struct ahc_softc *ahc, struct scb *scb) 5746 { 5747 struct scb *prev_scb; 5748 5749 prev_scb = NULL; 5750 if (ahc_qinfifo_count(ahc) != 0) { 5751 u_int prev_tag; 5752 uint8_t prev_pos; 5753 5754 prev_pos = ahc->qinfifonext - 1; 5755 prev_tag = ahc->qinfifo[prev_pos]; 5756 prev_scb = ahc_lookup_scb(ahc, prev_tag); 5757 } 5758 ahc_qinfifo_requeue(ahc, prev_scb, scb); 5759 if ((ahc->features & AHC_QUEUE_REGS) != 0) { 5760 ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext); 5761 } else { 5762 ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext); 5763 } 5764 } 5765 5766 static void ahc_qinfifo_requeue(struct ahc_softc * ahc,struct scb * prev_scb,struct scb * scb)5767 ahc_qinfifo_requeue(struct ahc_softc *ahc, struct scb *prev_scb, 5768 struct scb *scb) 5769 { 5770 if (prev_scb == NULL) { 5771 ahc_outb(ahc, NEXT_QUEUED_SCB, scb->hscb->tag); 5772 } else { 5773 prev_scb->hscb->next = scb->hscb->tag; 5774 ahc_sync_scb(ahc, prev_scb, 5775 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 5776 } 5777 ahc->qinfifo[ahc->qinfifonext++] = scb->hscb->tag; 5778 scb->hscb->next = ahc->next_queued_scb->hscb->tag; 5779 ahc_sync_scb(ahc, scb, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 5780 } 5781 5782 static int ahc_qinfifo_count(struct ahc_softc * ahc)5783 ahc_qinfifo_count(struct ahc_softc *ahc) 5784 { 5785 uint8_t qinpos; 5786 uint8_t diff; 5787 5788 if ((ahc->features & AHC_QUEUE_REGS) != 0) { 5789 qinpos = ahc_inb(ahc, SNSCB_QOFF); 5790 ahc_outb(ahc, SNSCB_QOFF, qinpos); 5791 } else 5792 qinpos = ahc_inb(ahc, QINPOS); 5793 diff = ahc->qinfifonext - qinpos; 5794 return (diff); 5795 } 5796 5797 int ahc_search_qinfifo(struct ahc_softc * ahc,int target,char channel,int lun,u_int tag,role_t role,uint32_t status,ahc_search_action action)5798 ahc_search_qinfifo(struct ahc_softc *ahc, int target, char channel, 5799 int lun, u_int tag, role_t role, uint32_t status, 5800 ahc_search_action action) 5801 { 5802 struct scb *scb; 5803 struct scb *prev_scb; 5804 uint8_t qinstart; 5805 uint8_t qinpos; 5806 uint8_t qintail; 5807 uint8_t next; 5808 uint8_t prev; 5809 uint8_t curscbptr; 5810 int found; 5811 int have_qregs; 5812 5813 qintail = ahc->qinfifonext; 5814 have_qregs = (ahc->features & AHC_QUEUE_REGS) != 0; 5815 if (have_qregs) { 5816 qinstart = ahc_inb(ahc, SNSCB_QOFF); 5817 ahc_outb(ahc, SNSCB_QOFF, qinstart); 5818 } else 5819 qinstart = ahc_inb(ahc, QINPOS); 5820 qinpos = qinstart; 5821 found = 0; 5822 prev_scb = NULL; 5823 5824 if (action == SEARCH_COMPLETE) { 5825 /* 5826 * Don't attempt to run any queued untagged transactions 5827 * until we are done with the abort process. 5828 */ 5829 ahc_freeze_untagged_queues(ahc); 5830 } 5831 5832 /* 5833 * Start with an empty queue. Entries that are not chosen 5834 * for removal will be re-added to the queue as we go. 5835 */ 5836 ahc->qinfifonext = qinpos; 5837 ahc_outb(ahc, NEXT_QUEUED_SCB, ahc->next_queued_scb->hscb->tag); 5838 5839 while (qinpos != qintail) { 5840 scb = ahc_lookup_scb(ahc, ahc->qinfifo[qinpos]); 5841 if (scb == NULL) { 5842 printk("qinpos = %d, SCB index = %d\n", 5843 qinpos, ahc->qinfifo[qinpos]); 5844 panic("Loop 1\n"); 5845 } 5846 5847 if (ahc_match_scb(ahc, scb, target, channel, lun, tag, role)) { 5848 /* 5849 * We found an scb that needs to be acted on. 5850 */ 5851 found++; 5852 switch (action) { 5853 case SEARCH_COMPLETE: 5854 { 5855 cam_status ostat; 5856 cam_status cstat; 5857 5858 ostat = ahc_get_transaction_status(scb); 5859 if (ostat == CAM_REQ_INPROG) 5860 ahc_set_transaction_status(scb, status); 5861 cstat = ahc_get_transaction_status(scb); 5862 if (cstat != CAM_REQ_CMP) 5863 ahc_freeze_scb(scb); 5864 if ((scb->flags & SCB_ACTIVE) == 0) 5865 printk("Inactive SCB in qinfifo\n"); 5866 ahc_done(ahc, scb); 5867 } 5868 fallthrough; 5869 case SEARCH_REMOVE: 5870 break; 5871 case SEARCH_COUNT: 5872 ahc_qinfifo_requeue(ahc, prev_scb, scb); 5873 prev_scb = scb; 5874 break; 5875 } 5876 } else { 5877 ahc_qinfifo_requeue(ahc, prev_scb, scb); 5878 prev_scb = scb; 5879 } 5880 qinpos++; 5881 } 5882 5883 if ((ahc->features & AHC_QUEUE_REGS) != 0) { 5884 ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext); 5885 } else { 5886 ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext); 5887 } 5888 5889 if (action != SEARCH_COUNT 5890 && (found != 0) 5891 && (qinstart != ahc->qinfifonext)) { 5892 /* 5893 * The sequencer may be in the process of dmaing 5894 * down the SCB at the beginning of the queue. 5895 * This could be problematic if either the first, 5896 * or the second SCB is removed from the queue 5897 * (the first SCB includes a pointer to the "next" 5898 * SCB to dma). If we have removed any entries, swap 5899 * the first element in the queue with the next HSCB 5900 * so the sequencer will notice that NEXT_QUEUED_SCB 5901 * has changed during its dma attempt and will retry 5902 * the DMA. 5903 */ 5904 scb = ahc_lookup_scb(ahc, ahc->qinfifo[qinstart]); 5905 5906 if (scb == NULL) { 5907 printk("found = %d, qinstart = %d, qinfifionext = %d\n", 5908 found, qinstart, ahc->qinfifonext); 5909 panic("First/Second Qinfifo fixup\n"); 5910 } 5911 /* 5912 * ahc_swap_with_next_hscb forces our next pointer to 5913 * point to the reserved SCB for future commands. Save 5914 * and restore our original next pointer to maintain 5915 * queue integrity. 5916 */ 5917 next = scb->hscb->next; 5918 ahc->scb_data->scbindex[scb->hscb->tag] = NULL; 5919 ahc_swap_with_next_hscb(ahc, scb); 5920 scb->hscb->next = next; 5921 ahc->qinfifo[qinstart] = scb->hscb->tag; 5922 5923 /* Tell the card about the new head of the qinfifo. */ 5924 ahc_outb(ahc, NEXT_QUEUED_SCB, scb->hscb->tag); 5925 5926 /* Fixup the tail "next" pointer. */ 5927 qintail = ahc->qinfifonext - 1; 5928 scb = ahc_lookup_scb(ahc, ahc->qinfifo[qintail]); 5929 scb->hscb->next = ahc->next_queued_scb->hscb->tag; 5930 } 5931 5932 /* 5933 * Search waiting for selection list. 5934 */ 5935 curscbptr = ahc_inb(ahc, SCBPTR); 5936 next = ahc_inb(ahc, WAITING_SCBH); /* Start at head of list. */ 5937 prev = SCB_LIST_NULL; 5938 5939 while (next != SCB_LIST_NULL) { 5940 uint8_t scb_index; 5941 5942 ahc_outb(ahc, SCBPTR, next); 5943 scb_index = ahc_inb(ahc, SCB_TAG); 5944 if (scb_index >= ahc->scb_data->numscbs) { 5945 printk("Waiting List inconsistency. " 5946 "SCB index == %d, yet numscbs == %d.", 5947 scb_index, ahc->scb_data->numscbs); 5948 ahc_dump_card_state(ahc); 5949 panic("for safety"); 5950 } 5951 scb = ahc_lookup_scb(ahc, scb_index); 5952 if (scb == NULL) { 5953 printk("scb_index = %d, next = %d\n", 5954 scb_index, next); 5955 panic("Waiting List traversal\n"); 5956 } 5957 if (ahc_match_scb(ahc, scb, target, channel, 5958 lun, SCB_LIST_NULL, role)) { 5959 /* 5960 * We found an scb that needs to be acted on. 5961 */ 5962 found++; 5963 switch (action) { 5964 case SEARCH_COMPLETE: 5965 { 5966 cam_status ostat; 5967 cam_status cstat; 5968 5969 ostat = ahc_get_transaction_status(scb); 5970 if (ostat == CAM_REQ_INPROG) 5971 ahc_set_transaction_status(scb, 5972 status); 5973 cstat = ahc_get_transaction_status(scb); 5974 if (cstat != CAM_REQ_CMP) 5975 ahc_freeze_scb(scb); 5976 if ((scb->flags & SCB_ACTIVE) == 0) 5977 printk("Inactive SCB in Waiting List\n"); 5978 ahc_done(ahc, scb); 5979 } 5980 fallthrough; 5981 case SEARCH_REMOVE: 5982 next = ahc_rem_wscb(ahc, next, prev); 5983 break; 5984 case SEARCH_COUNT: 5985 prev = next; 5986 next = ahc_inb(ahc, SCB_NEXT); 5987 break; 5988 } 5989 } else { 5990 prev = next; 5991 next = ahc_inb(ahc, SCB_NEXT); 5992 } 5993 } 5994 ahc_outb(ahc, SCBPTR, curscbptr); 5995 5996 found += ahc_search_untagged_queues(ahc, /*ahc_io_ctx_t*/NULL, target, 5997 channel, lun, status, action); 5998 5999 if (action == SEARCH_COMPLETE) 6000 ahc_release_untagged_queues(ahc); 6001 return (found); 6002 } 6003 6004 int ahc_search_untagged_queues(struct ahc_softc * ahc,ahc_io_ctx_t ctx,int target,char channel,int lun,uint32_t status,ahc_search_action action)6005 ahc_search_untagged_queues(struct ahc_softc *ahc, ahc_io_ctx_t ctx, 6006 int target, char channel, int lun, uint32_t status, 6007 ahc_search_action action) 6008 { 6009 struct scb *scb; 6010 int maxtarget; 6011 int found; 6012 int i; 6013 6014 if (action == SEARCH_COMPLETE) { 6015 /* 6016 * Don't attempt to run any queued untagged transactions 6017 * until we are done with the abort process. 6018 */ 6019 ahc_freeze_untagged_queues(ahc); 6020 } 6021 6022 found = 0; 6023 i = 0; 6024 if ((ahc->flags & AHC_SCB_BTT) == 0) { 6025 6026 maxtarget = 16; 6027 if (target != CAM_TARGET_WILDCARD) { 6028 6029 i = target; 6030 if (channel == 'B') 6031 i += 8; 6032 maxtarget = i + 1; 6033 } 6034 } else { 6035 maxtarget = 0; 6036 } 6037 6038 for (; i < maxtarget; i++) { 6039 struct scb_tailq *untagged_q; 6040 struct scb *next_scb; 6041 6042 untagged_q = &(ahc->untagged_queues[i]); 6043 next_scb = TAILQ_FIRST(untagged_q); 6044 while (next_scb != NULL) { 6045 6046 scb = next_scb; 6047 next_scb = TAILQ_NEXT(scb, links.tqe); 6048 6049 /* 6050 * The head of the list may be the currently 6051 * active untagged command for a device. 6052 * We're only searching for commands that 6053 * have not been started. A transaction 6054 * marked active but still in the qinfifo 6055 * is removed by the qinfifo scanning code 6056 * above. 6057 */ 6058 if ((scb->flags & SCB_ACTIVE) != 0) 6059 continue; 6060 6061 if (ahc_match_scb(ahc, scb, target, channel, lun, 6062 SCB_LIST_NULL, ROLE_INITIATOR) == 0 6063 || (ctx != NULL && ctx != scb->io_ctx)) 6064 continue; 6065 6066 /* 6067 * We found an scb that needs to be acted on. 6068 */ 6069 found++; 6070 switch (action) { 6071 case SEARCH_COMPLETE: 6072 { 6073 cam_status ostat; 6074 cam_status cstat; 6075 6076 ostat = ahc_get_transaction_status(scb); 6077 if (ostat == CAM_REQ_INPROG) 6078 ahc_set_transaction_status(scb, status); 6079 cstat = ahc_get_transaction_status(scb); 6080 if (cstat != CAM_REQ_CMP) 6081 ahc_freeze_scb(scb); 6082 if ((scb->flags & SCB_ACTIVE) == 0) 6083 printk("Inactive SCB in untaggedQ\n"); 6084 ahc_done(ahc, scb); 6085 break; 6086 } 6087 case SEARCH_REMOVE: 6088 scb->flags &= ~SCB_UNTAGGEDQ; 6089 TAILQ_REMOVE(untagged_q, scb, links.tqe); 6090 break; 6091 case SEARCH_COUNT: 6092 break; 6093 } 6094 } 6095 } 6096 6097 if (action == SEARCH_COMPLETE) 6098 ahc_release_untagged_queues(ahc); 6099 return (found); 6100 } 6101 6102 int ahc_search_disc_list(struct ahc_softc * ahc,int target,char channel,int lun,u_int tag,int stop_on_first,int remove,int save_state)6103 ahc_search_disc_list(struct ahc_softc *ahc, int target, char channel, 6104 int lun, u_int tag, int stop_on_first, int remove, 6105 int save_state) 6106 { 6107 struct scb *scbp; 6108 u_int next; 6109 u_int prev; 6110 u_int count; 6111 u_int active_scb; 6112 6113 count = 0; 6114 next = ahc_inb(ahc, DISCONNECTED_SCBH); 6115 prev = SCB_LIST_NULL; 6116 6117 if (save_state) { 6118 /* restore this when we're done */ 6119 active_scb = ahc_inb(ahc, SCBPTR); 6120 } else 6121 /* Silence compiler */ 6122 active_scb = SCB_LIST_NULL; 6123 6124 while (next != SCB_LIST_NULL) { 6125 u_int scb_index; 6126 6127 ahc_outb(ahc, SCBPTR, next); 6128 scb_index = ahc_inb(ahc, SCB_TAG); 6129 if (scb_index >= ahc->scb_data->numscbs) { 6130 printk("Disconnected List inconsistency. " 6131 "SCB index == %d, yet numscbs == %d.", 6132 scb_index, ahc->scb_data->numscbs); 6133 ahc_dump_card_state(ahc); 6134 panic("for safety"); 6135 } 6136 6137 if (next == prev) { 6138 panic("Disconnected List Loop. " 6139 "cur SCBPTR == %x, prev SCBPTR == %x.", 6140 next, prev); 6141 } 6142 scbp = ahc_lookup_scb(ahc, scb_index); 6143 if (ahc_match_scb(ahc, scbp, target, channel, lun, 6144 tag, ROLE_INITIATOR)) { 6145 count++; 6146 if (remove) { 6147 next = 6148 ahc_rem_scb_from_disc_list(ahc, prev, next); 6149 } else { 6150 prev = next; 6151 next = ahc_inb(ahc, SCB_NEXT); 6152 } 6153 if (stop_on_first) 6154 break; 6155 } else { 6156 prev = next; 6157 next = ahc_inb(ahc, SCB_NEXT); 6158 } 6159 } 6160 if (save_state) 6161 ahc_outb(ahc, SCBPTR, active_scb); 6162 return (count); 6163 } 6164 6165 /* 6166 * Remove an SCB from the on chip list of disconnected transactions. 6167 * This is empty/unused if we are not performing SCB paging. 6168 */ 6169 static u_int ahc_rem_scb_from_disc_list(struct ahc_softc * ahc,u_int prev,u_int scbptr)6170 ahc_rem_scb_from_disc_list(struct ahc_softc *ahc, u_int prev, u_int scbptr) 6171 { 6172 u_int next; 6173 6174 ahc_outb(ahc, SCBPTR, scbptr); 6175 next = ahc_inb(ahc, SCB_NEXT); 6176 6177 ahc_outb(ahc, SCB_CONTROL, 0); 6178 6179 ahc_add_curscb_to_free_list(ahc); 6180 6181 if (prev != SCB_LIST_NULL) { 6182 ahc_outb(ahc, SCBPTR, prev); 6183 ahc_outb(ahc, SCB_NEXT, next); 6184 } else 6185 ahc_outb(ahc, DISCONNECTED_SCBH, next); 6186 6187 return (next); 6188 } 6189 6190 /* 6191 * Add the SCB as selected by SCBPTR onto the on chip list of 6192 * free hardware SCBs. This list is empty/unused if we are not 6193 * performing SCB paging. 6194 */ 6195 static void ahc_add_curscb_to_free_list(struct ahc_softc * ahc)6196 ahc_add_curscb_to_free_list(struct ahc_softc *ahc) 6197 { 6198 /* 6199 * Invalidate the tag so that our abort 6200 * routines don't think it's active. 6201 */ 6202 ahc_outb(ahc, SCB_TAG, SCB_LIST_NULL); 6203 6204 if ((ahc->flags & AHC_PAGESCBS) != 0) { 6205 ahc_outb(ahc, SCB_NEXT, ahc_inb(ahc, FREE_SCBH)); 6206 ahc_outb(ahc, FREE_SCBH, ahc_inb(ahc, SCBPTR)); 6207 } 6208 } 6209 6210 /* 6211 * Manipulate the waiting for selection list and return the 6212 * scb that follows the one that we remove. 6213 */ 6214 static u_int ahc_rem_wscb(struct ahc_softc * ahc,u_int scbpos,u_int prev)6215 ahc_rem_wscb(struct ahc_softc *ahc, u_int scbpos, u_int prev) 6216 { 6217 u_int curscb, next; 6218 6219 /* 6220 * Select the SCB we want to abort and 6221 * pull the next pointer out of it. 6222 */ 6223 curscb = ahc_inb(ahc, SCBPTR); 6224 ahc_outb(ahc, SCBPTR, scbpos); 6225 next = ahc_inb(ahc, SCB_NEXT); 6226 6227 /* Clear the necessary fields */ 6228 ahc_outb(ahc, SCB_CONTROL, 0); 6229 6230 ahc_add_curscb_to_free_list(ahc); 6231 6232 /* update the waiting list */ 6233 if (prev == SCB_LIST_NULL) { 6234 /* First in the list */ 6235 ahc_outb(ahc, WAITING_SCBH, next); 6236 6237 /* 6238 * Ensure we aren't attempting to perform 6239 * selection for this entry. 6240 */ 6241 ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO)); 6242 } else { 6243 /* 6244 * Select the scb that pointed to us 6245 * and update its next pointer. 6246 */ 6247 ahc_outb(ahc, SCBPTR, prev); 6248 ahc_outb(ahc, SCB_NEXT, next); 6249 } 6250 6251 /* 6252 * Point us back at the original scb position. 6253 */ 6254 ahc_outb(ahc, SCBPTR, curscb); 6255 return next; 6256 } 6257 6258 /******************************** Error Handling ******************************/ 6259 /* 6260 * Abort all SCBs that match the given description (target/channel/lun/tag), 6261 * setting their status to the passed in status if the status has not already 6262 * been modified from CAM_REQ_INPROG. This routine assumes that the sequencer 6263 * is paused before it is called. 6264 */ 6265 static int ahc_abort_scbs(struct ahc_softc * ahc,int target,char channel,int lun,u_int tag,role_t role,uint32_t status)6266 ahc_abort_scbs(struct ahc_softc *ahc, int target, char channel, 6267 int lun, u_int tag, role_t role, uint32_t status) 6268 { 6269 struct scb *scbp; 6270 struct scb *scbp_next; 6271 u_int active_scb; 6272 int i, j; 6273 int maxtarget; 6274 int minlun; 6275 int maxlun; 6276 6277 int found; 6278 6279 /* 6280 * Don't attempt to run any queued untagged transactions 6281 * until we are done with the abort process. 6282 */ 6283 ahc_freeze_untagged_queues(ahc); 6284 6285 /* restore this when we're done */ 6286 active_scb = ahc_inb(ahc, SCBPTR); 6287 6288 found = ahc_search_qinfifo(ahc, target, channel, lun, SCB_LIST_NULL, 6289 role, CAM_REQUEUE_REQ, SEARCH_COMPLETE); 6290 6291 /* 6292 * Clean out the busy target table for any untagged commands. 6293 */ 6294 i = 0; 6295 maxtarget = 16; 6296 if (target != CAM_TARGET_WILDCARD) { 6297 i = target; 6298 if (channel == 'B') 6299 i += 8; 6300 maxtarget = i + 1; 6301 } 6302 6303 if (lun == CAM_LUN_WILDCARD) { 6304 6305 /* 6306 * Unless we are using an SCB based 6307 * busy targets table, there is only 6308 * one table entry for all luns of 6309 * a target. 6310 */ 6311 minlun = 0; 6312 maxlun = 1; 6313 if ((ahc->flags & AHC_SCB_BTT) != 0) 6314 maxlun = AHC_NUM_LUNS; 6315 } else { 6316 minlun = lun; 6317 maxlun = lun + 1; 6318 } 6319 6320 if (role != ROLE_TARGET) { 6321 for (;i < maxtarget; i++) { 6322 for (j = minlun;j < maxlun; j++) { 6323 u_int scbid; 6324 u_int tcl; 6325 6326 tcl = BUILD_TCL(i << 4, j); 6327 scbid = ahc_index_busy_tcl(ahc, tcl); 6328 scbp = ahc_lookup_scb(ahc, scbid); 6329 if (scbp == NULL 6330 || ahc_match_scb(ahc, scbp, target, channel, 6331 lun, tag, role) == 0) 6332 continue; 6333 ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, j)); 6334 } 6335 } 6336 6337 /* 6338 * Go through the disconnected list and remove any entries we 6339 * have queued for completion, 0'ing their control byte too. 6340 * We save the active SCB and restore it ourselves, so there 6341 * is no reason for this search to restore it too. 6342 */ 6343 ahc_search_disc_list(ahc, target, channel, lun, tag, 6344 /*stop_on_first*/FALSE, /*remove*/TRUE, 6345 /*save_state*/FALSE); 6346 } 6347 6348 /* 6349 * Go through the hardware SCB array looking for commands that 6350 * were active but not on any list. In some cases, these remnants 6351 * might not still have mappings in the scbindex array (e.g. unexpected 6352 * bus free with the same scb queued for an abort). Don't hold this 6353 * against them. 6354 */ 6355 for (i = 0; i < ahc->scb_data->maxhscbs; i++) { 6356 u_int scbid; 6357 6358 ahc_outb(ahc, SCBPTR, i); 6359 scbid = ahc_inb(ahc, SCB_TAG); 6360 scbp = ahc_lookup_scb(ahc, scbid); 6361 if ((scbp == NULL && scbid != SCB_LIST_NULL) 6362 || (scbp != NULL 6363 && ahc_match_scb(ahc, scbp, target, channel, lun, tag, role))) 6364 ahc_add_curscb_to_free_list(ahc); 6365 } 6366 6367 /* 6368 * Go through the pending CCB list and look for 6369 * commands for this target that are still active. 6370 * These are other tagged commands that were 6371 * disconnected when the reset occurred. 6372 */ 6373 scbp_next = LIST_FIRST(&ahc->pending_scbs); 6374 while (scbp_next != NULL) { 6375 scbp = scbp_next; 6376 scbp_next = LIST_NEXT(scbp, pending_links); 6377 if (ahc_match_scb(ahc, scbp, target, channel, lun, tag, role)) { 6378 cam_status ostat; 6379 6380 ostat = ahc_get_transaction_status(scbp); 6381 if (ostat == CAM_REQ_INPROG) 6382 ahc_set_transaction_status(scbp, status); 6383 if (ahc_get_transaction_status(scbp) != CAM_REQ_CMP) 6384 ahc_freeze_scb(scbp); 6385 if ((scbp->flags & SCB_ACTIVE) == 0) 6386 printk("Inactive SCB on pending list\n"); 6387 ahc_done(ahc, scbp); 6388 found++; 6389 } 6390 } 6391 ahc_outb(ahc, SCBPTR, active_scb); 6392 ahc_platform_abort_scbs(ahc, target, channel, lun, tag, role, status); 6393 ahc_release_untagged_queues(ahc); 6394 return found; 6395 } 6396 6397 static void ahc_reset_current_bus(struct ahc_softc * ahc)6398 ahc_reset_current_bus(struct ahc_softc *ahc) 6399 { 6400 uint8_t scsiseq; 6401 6402 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENSCSIRST); 6403 scsiseq = ahc_inb(ahc, SCSISEQ); 6404 ahc_outb(ahc, SCSISEQ, scsiseq | SCSIRSTO); 6405 ahc_flush_device_writes(ahc); 6406 ahc_delay(AHC_BUSRESET_DELAY); 6407 /* Turn off the bus reset */ 6408 ahc_outb(ahc, SCSISEQ, scsiseq & ~SCSIRSTO); 6409 6410 ahc_clear_intstat(ahc); 6411 6412 /* Re-enable reset interrupts */ 6413 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) | ENSCSIRST); 6414 } 6415 6416 int ahc_reset_channel(struct ahc_softc * ahc,char channel,int initiate_reset)6417 ahc_reset_channel(struct ahc_softc *ahc, char channel, int initiate_reset) 6418 { 6419 struct ahc_devinfo devinfo; 6420 u_int initiator, target, max_scsiid; 6421 u_int sblkctl; 6422 u_int scsiseq; 6423 u_int simode1; 6424 int found; 6425 int restart_needed; 6426 char cur_channel; 6427 6428 ahc->pending_device = NULL; 6429 6430 ahc_compile_devinfo(&devinfo, 6431 CAM_TARGET_WILDCARD, 6432 CAM_TARGET_WILDCARD, 6433 CAM_LUN_WILDCARD, 6434 channel, ROLE_UNKNOWN); 6435 ahc_pause(ahc); 6436 6437 /* Make sure the sequencer is in a safe location. */ 6438 ahc_clear_critical_section(ahc); 6439 6440 /* 6441 * Run our command complete fifos to ensure that we perform 6442 * completion processing on any commands that 'completed' 6443 * before the reset occurred. 6444 */ 6445 ahc_run_qoutfifo(ahc); 6446 #ifdef AHC_TARGET_MODE 6447 /* 6448 * XXX - In Twin mode, the tqinfifo may have commands 6449 * for an unaffected channel in it. However, if 6450 * we have run out of ATIO resources to drain that 6451 * queue, we may not get them all out here. Further, 6452 * the blocked transactions for the reset channel 6453 * should just be killed off, irrespecitve of whether 6454 * we are blocked on ATIO resources. Write a routine 6455 * to compact the tqinfifo appropriately. 6456 */ 6457 if ((ahc->flags & AHC_TARGETROLE) != 0) { 6458 ahc_run_tqinfifo(ahc, /*paused*/TRUE); 6459 } 6460 #endif 6461 6462 /* 6463 * Reset the bus if we are initiating this reset 6464 */ 6465 sblkctl = ahc_inb(ahc, SBLKCTL); 6466 cur_channel = 'A'; 6467 if ((ahc->features & AHC_TWIN) != 0 6468 && ((sblkctl & SELBUSB) != 0)) 6469 cur_channel = 'B'; 6470 scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE); 6471 if (cur_channel != channel) { 6472 /* Case 1: Command for another bus is active 6473 * Stealthily reset the other bus without 6474 * upsetting the current bus. 6475 */ 6476 ahc_outb(ahc, SBLKCTL, sblkctl ^ SELBUSB); 6477 simode1 = ahc_inb(ahc, SIMODE1) & ~(ENBUSFREE|ENSCSIRST); 6478 #ifdef AHC_TARGET_MODE 6479 /* 6480 * Bus resets clear ENSELI, so we cannot 6481 * defer re-enabling bus reset interrupts 6482 * if we are in target mode. 6483 */ 6484 if ((ahc->flags & AHC_TARGETROLE) != 0) 6485 simode1 |= ENSCSIRST; 6486 #endif 6487 ahc_outb(ahc, SIMODE1, simode1); 6488 if (initiate_reset) 6489 ahc_reset_current_bus(ahc); 6490 ahc_clear_intstat(ahc); 6491 ahc_outb(ahc, SCSISEQ, scsiseq & (ENSELI|ENRSELI|ENAUTOATNP)); 6492 ahc_outb(ahc, SBLKCTL, sblkctl); 6493 restart_needed = FALSE; 6494 } else { 6495 /* Case 2: A command from this bus is active or we're idle */ 6496 simode1 = ahc_inb(ahc, SIMODE1) & ~(ENBUSFREE|ENSCSIRST); 6497 #ifdef AHC_TARGET_MODE 6498 /* 6499 * Bus resets clear ENSELI, so we cannot 6500 * defer re-enabling bus reset interrupts 6501 * if we are in target mode. 6502 */ 6503 if ((ahc->flags & AHC_TARGETROLE) != 0) 6504 simode1 |= ENSCSIRST; 6505 #endif 6506 ahc_outb(ahc, SIMODE1, simode1); 6507 if (initiate_reset) 6508 ahc_reset_current_bus(ahc); 6509 ahc_clear_intstat(ahc); 6510 ahc_outb(ahc, SCSISEQ, scsiseq & (ENSELI|ENRSELI|ENAUTOATNP)); 6511 restart_needed = TRUE; 6512 } 6513 6514 /* 6515 * Clean up all the state information for the 6516 * pending transactions on this bus. 6517 */ 6518 found = ahc_abort_scbs(ahc, CAM_TARGET_WILDCARD, channel, 6519 CAM_LUN_WILDCARD, SCB_LIST_NULL, 6520 ROLE_UNKNOWN, CAM_SCSI_BUS_RESET); 6521 6522 max_scsiid = (ahc->features & AHC_WIDE) ? 15 : 7; 6523 6524 #ifdef AHC_TARGET_MODE 6525 /* 6526 * Send an immediate notify ccb to all target more peripheral 6527 * drivers affected by this action. 6528 */ 6529 for (target = 0; target <= max_scsiid; target++) { 6530 struct ahc_tmode_tstate* tstate; 6531 u_int lun; 6532 6533 tstate = ahc->enabled_targets[target]; 6534 if (tstate == NULL) 6535 continue; 6536 for (lun = 0; lun < AHC_NUM_LUNS; lun++) { 6537 struct ahc_tmode_lstate* lstate; 6538 6539 lstate = tstate->enabled_luns[lun]; 6540 if (lstate == NULL) 6541 continue; 6542 6543 ahc_queue_lstate_event(ahc, lstate, CAM_TARGET_WILDCARD, 6544 EVENT_TYPE_BUS_RESET, /*arg*/0); 6545 ahc_send_lstate_events(ahc, lstate); 6546 } 6547 } 6548 #endif 6549 /* Notify the XPT that a bus reset occurred */ 6550 ahc_send_async(ahc, devinfo.channel, CAM_TARGET_WILDCARD, 6551 CAM_LUN_WILDCARD, AC_BUS_RESET); 6552 6553 /* 6554 * Revert to async/narrow transfers until we renegotiate. 6555 */ 6556 for (target = 0; target <= max_scsiid; target++) { 6557 6558 if (ahc->enabled_targets[target] == NULL) 6559 continue; 6560 for (initiator = 0; initiator <= max_scsiid; initiator++) { 6561 struct ahc_devinfo devinfo; 6562 6563 ahc_compile_devinfo(&devinfo, target, initiator, 6564 CAM_LUN_WILDCARD, 6565 channel, ROLE_UNKNOWN); 6566 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 6567 AHC_TRANS_CUR, /*paused*/TRUE); 6568 ahc_set_syncrate(ahc, &devinfo, /*syncrate*/NULL, 6569 /*period*/0, /*offset*/0, 6570 /*ppr_options*/0, AHC_TRANS_CUR, 6571 /*paused*/TRUE); 6572 } 6573 } 6574 6575 if (restart_needed) 6576 ahc_restart(ahc); 6577 else 6578 ahc_unpause(ahc); 6579 return found; 6580 } 6581 6582 6583 /***************************** Residual Processing ****************************/ 6584 /* 6585 * Calculate the residual for a just completed SCB. 6586 */ 6587 static void ahc_calc_residual(struct ahc_softc * ahc,struct scb * scb)6588 ahc_calc_residual(struct ahc_softc *ahc, struct scb *scb) 6589 { 6590 struct hardware_scb *hscb; 6591 struct status_pkt *spkt; 6592 uint32_t sgptr; 6593 uint32_t resid_sgptr; 6594 uint32_t resid; 6595 6596 /* 6597 * 5 cases. 6598 * 1) No residual. 6599 * SG_RESID_VALID clear in sgptr. 6600 * 2) Transferless command 6601 * 3) Never performed any transfers. 6602 * sgptr has SG_FULL_RESID set. 6603 * 4) No residual but target did not 6604 * save data pointers after the 6605 * last transfer, so sgptr was 6606 * never updated. 6607 * 5) We have a partial residual. 6608 * Use residual_sgptr to determine 6609 * where we are. 6610 */ 6611 6612 hscb = scb->hscb; 6613 sgptr = ahc_le32toh(hscb->sgptr); 6614 if ((sgptr & SG_RESID_VALID) == 0) 6615 /* Case 1 */ 6616 return; 6617 sgptr &= ~SG_RESID_VALID; 6618 6619 if ((sgptr & SG_LIST_NULL) != 0) 6620 /* Case 2 */ 6621 return; 6622 6623 spkt = &hscb->shared_data.status; 6624 resid_sgptr = ahc_le32toh(spkt->residual_sg_ptr); 6625 if ((sgptr & SG_FULL_RESID) != 0) { 6626 /* Case 3 */ 6627 resid = ahc_get_transfer_length(scb); 6628 } else if ((resid_sgptr & SG_LIST_NULL) != 0) { 6629 /* Case 4 */ 6630 return; 6631 } else if ((resid_sgptr & ~SG_PTR_MASK) != 0) { 6632 panic("Bogus resid sgptr value 0x%x\n", resid_sgptr); 6633 } else { 6634 struct ahc_dma_seg *sg; 6635 6636 /* 6637 * Remainder of the SG where the transfer 6638 * stopped. 6639 */ 6640 resid = ahc_le32toh(spkt->residual_datacnt) & AHC_SG_LEN_MASK; 6641 sg = ahc_sg_bus_to_virt(scb, resid_sgptr & SG_PTR_MASK); 6642 6643 /* The residual sg_ptr always points to the next sg */ 6644 sg--; 6645 6646 /* 6647 * Add up the contents of all residual 6648 * SG segments that are after the SG where 6649 * the transfer stopped. 6650 */ 6651 while ((ahc_le32toh(sg->len) & AHC_DMA_LAST_SEG) == 0) { 6652 sg++; 6653 resid += ahc_le32toh(sg->len) & AHC_SG_LEN_MASK; 6654 } 6655 } 6656 if ((scb->flags & SCB_SENSE) == 0) 6657 ahc_set_residual(scb, resid); 6658 else 6659 ahc_set_sense_residual(scb, resid); 6660 6661 #ifdef AHC_DEBUG 6662 if ((ahc_debug & AHC_SHOW_MISC) != 0) { 6663 ahc_print_path(ahc, scb); 6664 printk("Handled %sResidual of %d bytes\n", 6665 (scb->flags & SCB_SENSE) ? "Sense " : "", resid); 6666 } 6667 #endif 6668 } 6669 6670 /******************************* Target Mode **********************************/ 6671 #ifdef AHC_TARGET_MODE 6672 /* 6673 * Add a target mode event to this lun's queue 6674 */ 6675 static void ahc_queue_lstate_event(struct ahc_softc * ahc,struct ahc_tmode_lstate * lstate,u_int initiator_id,u_int event_type,u_int event_arg)6676 ahc_queue_lstate_event(struct ahc_softc *ahc, struct ahc_tmode_lstate *lstate, 6677 u_int initiator_id, u_int event_type, u_int event_arg) 6678 { 6679 struct ahc_tmode_event *event; 6680 int pending; 6681 6682 xpt_freeze_devq(lstate->path, /*count*/1); 6683 if (lstate->event_w_idx >= lstate->event_r_idx) 6684 pending = lstate->event_w_idx - lstate->event_r_idx; 6685 else 6686 pending = AHC_TMODE_EVENT_BUFFER_SIZE + 1 6687 - (lstate->event_r_idx - lstate->event_w_idx); 6688 6689 if (event_type == EVENT_TYPE_BUS_RESET 6690 || event_type == TARGET_RESET) { 6691 /* 6692 * Any earlier events are irrelevant, so reset our buffer. 6693 * This has the effect of allowing us to deal with reset 6694 * floods (an external device holding down the reset line) 6695 * without losing the event that is really interesting. 6696 */ 6697 lstate->event_r_idx = 0; 6698 lstate->event_w_idx = 0; 6699 xpt_release_devq(lstate->path, pending, /*runqueue*/FALSE); 6700 } 6701 6702 if (pending == AHC_TMODE_EVENT_BUFFER_SIZE) { 6703 xpt_print_path(lstate->path); 6704 printk("immediate event %x:%x lost\n", 6705 lstate->event_buffer[lstate->event_r_idx].event_type, 6706 lstate->event_buffer[lstate->event_r_idx].event_arg); 6707 lstate->event_r_idx++; 6708 if (lstate->event_r_idx == AHC_TMODE_EVENT_BUFFER_SIZE) 6709 lstate->event_r_idx = 0; 6710 xpt_release_devq(lstate->path, /*count*/1, /*runqueue*/FALSE); 6711 } 6712 6713 event = &lstate->event_buffer[lstate->event_w_idx]; 6714 event->initiator_id = initiator_id; 6715 event->event_type = event_type; 6716 event->event_arg = event_arg; 6717 lstate->event_w_idx++; 6718 if (lstate->event_w_idx == AHC_TMODE_EVENT_BUFFER_SIZE) 6719 lstate->event_w_idx = 0; 6720 } 6721 6722 /* 6723 * Send any target mode events queued up waiting 6724 * for immediate notify resources. 6725 */ 6726 void ahc_send_lstate_events(struct ahc_softc * ahc,struct ahc_tmode_lstate * lstate)6727 ahc_send_lstate_events(struct ahc_softc *ahc, struct ahc_tmode_lstate *lstate) 6728 { 6729 struct ccb_hdr *ccbh; 6730 struct ccb_immed_notify *inot; 6731 6732 while (lstate->event_r_idx != lstate->event_w_idx 6733 && (ccbh = SLIST_FIRST(&lstate->immed_notifies)) != NULL) { 6734 struct ahc_tmode_event *event; 6735 6736 event = &lstate->event_buffer[lstate->event_r_idx]; 6737 SLIST_REMOVE_HEAD(&lstate->immed_notifies, sim_links.sle); 6738 inot = (struct ccb_immed_notify *)ccbh; 6739 switch (event->event_type) { 6740 case EVENT_TYPE_BUS_RESET: 6741 ccbh->status = CAM_SCSI_BUS_RESET|CAM_DEV_QFRZN; 6742 break; 6743 default: 6744 ccbh->status = CAM_MESSAGE_RECV|CAM_DEV_QFRZN; 6745 inot->message_args[0] = event->event_type; 6746 inot->message_args[1] = event->event_arg; 6747 break; 6748 } 6749 inot->initiator_id = event->initiator_id; 6750 inot->sense_len = 0; 6751 xpt_done((union ccb *)inot); 6752 lstate->event_r_idx++; 6753 if (lstate->event_r_idx == AHC_TMODE_EVENT_BUFFER_SIZE) 6754 lstate->event_r_idx = 0; 6755 } 6756 } 6757 #endif 6758 6759 /******************** Sequencer Program Patching/Download *********************/ 6760 6761 #ifdef AHC_DUMP_SEQ 6762 void ahc_dumpseq(struct ahc_softc * ahc)6763 ahc_dumpseq(struct ahc_softc* ahc) 6764 { 6765 int i; 6766 6767 ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE|LOADRAM); 6768 ahc_outb(ahc, SEQADDR0, 0); 6769 ahc_outb(ahc, SEQADDR1, 0); 6770 for (i = 0; i < ahc->instruction_ram_size; i++) { 6771 uint8_t ins_bytes[4]; 6772 6773 ahc_insb(ahc, SEQRAM, ins_bytes, 4); 6774 printk("0x%08x\n", ins_bytes[0] << 24 6775 | ins_bytes[1] << 16 6776 | ins_bytes[2] << 8 6777 | ins_bytes[3]); 6778 } 6779 } 6780 #endif 6781 6782 static int ahc_loadseq(struct ahc_softc * ahc)6783 ahc_loadseq(struct ahc_softc *ahc) 6784 { 6785 struct cs cs_table[NUM_CRITICAL_SECTIONS]; 6786 u_int begin_set[NUM_CRITICAL_SECTIONS]; 6787 u_int end_set[NUM_CRITICAL_SECTIONS]; 6788 const struct patch *cur_patch; 6789 u_int cs_count; 6790 u_int cur_cs; 6791 u_int i; 6792 u_int skip_addr; 6793 u_int sg_prefetch_cnt; 6794 int downloaded; 6795 uint8_t download_consts[7]; 6796 6797 /* 6798 * Start out with 0 critical sections 6799 * that apply to this firmware load. 6800 */ 6801 cs_count = 0; 6802 cur_cs = 0; 6803 memset(begin_set, 0, sizeof(begin_set)); 6804 memset(end_set, 0, sizeof(end_set)); 6805 6806 /* Setup downloadable constant table */ 6807 download_consts[QOUTFIFO_OFFSET] = 0; 6808 if (ahc->targetcmds != NULL) 6809 download_consts[QOUTFIFO_OFFSET] += 32; 6810 download_consts[QINFIFO_OFFSET] = download_consts[QOUTFIFO_OFFSET] + 1; 6811 download_consts[CACHESIZE_MASK] = ahc->pci_cachesize - 1; 6812 download_consts[INVERTED_CACHESIZE_MASK] = ~(ahc->pci_cachesize - 1); 6813 sg_prefetch_cnt = ahc->pci_cachesize; 6814 if (sg_prefetch_cnt < (2 * sizeof(struct ahc_dma_seg))) 6815 sg_prefetch_cnt = 2 * sizeof(struct ahc_dma_seg); 6816 download_consts[SG_PREFETCH_CNT] = sg_prefetch_cnt; 6817 download_consts[SG_PREFETCH_ALIGN_MASK] = ~(sg_prefetch_cnt - 1); 6818 download_consts[SG_PREFETCH_ADDR_MASK] = (sg_prefetch_cnt - 1); 6819 6820 cur_patch = patches; 6821 downloaded = 0; 6822 skip_addr = 0; 6823 ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE|LOADRAM); 6824 ahc_outb(ahc, SEQADDR0, 0); 6825 ahc_outb(ahc, SEQADDR1, 0); 6826 6827 for (i = 0; i < sizeof(seqprog)/4; i++) { 6828 if (ahc_check_patch(ahc, &cur_patch, i, &skip_addr) == 0) { 6829 /* 6830 * Don't download this instruction as it 6831 * is in a patch that was removed. 6832 */ 6833 continue; 6834 } 6835 6836 if (downloaded == ahc->instruction_ram_size) { 6837 /* 6838 * We're about to exceed the instruction 6839 * storage capacity for this chip. Fail 6840 * the load. 6841 */ 6842 printk("\n%s: Program too large for instruction memory " 6843 "size of %d!\n", ahc_name(ahc), 6844 ahc->instruction_ram_size); 6845 return (ENOMEM); 6846 } 6847 6848 /* 6849 * Move through the CS table until we find a CS 6850 * that might apply to this instruction. 6851 */ 6852 for (; cur_cs < NUM_CRITICAL_SECTIONS; cur_cs++) { 6853 if (critical_sections[cur_cs].end <= i) { 6854 if (begin_set[cs_count] == TRUE 6855 && end_set[cs_count] == FALSE) { 6856 cs_table[cs_count].end = downloaded; 6857 end_set[cs_count] = TRUE; 6858 cs_count++; 6859 } 6860 continue; 6861 } 6862 if (critical_sections[cur_cs].begin <= i 6863 && begin_set[cs_count] == FALSE) { 6864 cs_table[cs_count].begin = downloaded; 6865 begin_set[cs_count] = TRUE; 6866 } 6867 break; 6868 } 6869 ahc_download_instr(ahc, i, download_consts); 6870 downloaded++; 6871 } 6872 6873 ahc->num_critical_sections = cs_count; 6874 if (cs_count != 0) { 6875 6876 cs_count *= sizeof(struct cs); 6877 ahc->critical_sections = kmemdup(cs_table, cs_count, GFP_ATOMIC); 6878 if (ahc->critical_sections == NULL) 6879 panic("ahc_loadseq: Could not malloc"); 6880 } 6881 ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE); 6882 6883 if (bootverbose) { 6884 printk(" %d instructions downloaded\n", downloaded); 6885 printk("%s: Features 0x%x, Bugs 0x%x, Flags 0x%x\n", 6886 ahc_name(ahc), ahc->features, ahc->bugs, ahc->flags); 6887 } 6888 return (0); 6889 } 6890 6891 static int ahc_check_patch(struct ahc_softc * ahc,const struct patch ** start_patch,u_int start_instr,u_int * skip_addr)6892 ahc_check_patch(struct ahc_softc *ahc, const struct patch **start_patch, 6893 u_int start_instr, u_int *skip_addr) 6894 { 6895 const struct patch *cur_patch; 6896 const struct patch *last_patch; 6897 u_int num_patches; 6898 6899 num_patches = ARRAY_SIZE(patches); 6900 last_patch = &patches[num_patches]; 6901 cur_patch = *start_patch; 6902 6903 while (cur_patch < last_patch && start_instr == cur_patch->begin) { 6904 6905 if (cur_patch->patch_func(ahc) == 0) { 6906 6907 /* Start rejecting code */ 6908 *skip_addr = start_instr + cur_patch->skip_instr; 6909 cur_patch += cur_patch->skip_patch; 6910 } else { 6911 /* Accepted this patch. Advance to the next 6912 * one and wait for our intruction pointer to 6913 * hit this point. 6914 */ 6915 cur_patch++; 6916 } 6917 } 6918 6919 *start_patch = cur_patch; 6920 if (start_instr < *skip_addr) 6921 /* Still skipping */ 6922 return (0); 6923 6924 return (1); 6925 } 6926 6927 static void ahc_download_instr(struct ahc_softc * ahc,u_int instrptr,uint8_t * dconsts)6928 ahc_download_instr(struct ahc_softc *ahc, u_int instrptr, uint8_t *dconsts) 6929 { 6930 union ins_formats instr; 6931 struct ins_format1 *fmt1_ins; 6932 struct ins_format3 *fmt3_ins; 6933 u_int opcode; 6934 6935 /* 6936 * The firmware is always compiled into a little endian format. 6937 */ 6938 instr.integer = ahc_le32toh(*(uint32_t*)&seqprog[instrptr * 4]); 6939 6940 fmt1_ins = &instr.format1; 6941 fmt3_ins = NULL; 6942 6943 /* Pull the opcode */ 6944 opcode = instr.format1.opcode; 6945 switch (opcode) { 6946 case AIC_OP_JMP: 6947 case AIC_OP_JC: 6948 case AIC_OP_JNC: 6949 case AIC_OP_CALL: 6950 case AIC_OP_JNE: 6951 case AIC_OP_JNZ: 6952 case AIC_OP_JE: 6953 case AIC_OP_JZ: 6954 { 6955 const struct patch *cur_patch; 6956 int address_offset; 6957 u_int address; 6958 u_int skip_addr; 6959 u_int i; 6960 6961 fmt3_ins = &instr.format3; 6962 address_offset = 0; 6963 address = fmt3_ins->address; 6964 cur_patch = patches; 6965 skip_addr = 0; 6966 6967 for (i = 0; i < address;) { 6968 6969 ahc_check_patch(ahc, &cur_patch, i, &skip_addr); 6970 6971 if (skip_addr > i) { 6972 int end_addr; 6973 6974 end_addr = min(address, skip_addr); 6975 address_offset += end_addr - i; 6976 i = skip_addr; 6977 } else { 6978 i++; 6979 } 6980 } 6981 address -= address_offset; 6982 fmt3_ins->address = address; 6983 } 6984 fallthrough; 6985 case AIC_OP_OR: 6986 case AIC_OP_AND: 6987 case AIC_OP_XOR: 6988 case AIC_OP_ADD: 6989 case AIC_OP_ADC: 6990 case AIC_OP_BMOV: 6991 if (fmt1_ins->parity != 0) { 6992 fmt1_ins->immediate = dconsts[fmt1_ins->immediate]; 6993 } 6994 fmt1_ins->parity = 0; 6995 if ((ahc->features & AHC_CMD_CHAN) == 0 6996 && opcode == AIC_OP_BMOV) { 6997 /* 6998 * Block move was added at the same time 6999 * as the command channel. Verify that 7000 * this is only a move of a single element 7001 * and convert the BMOV to a MOV 7002 * (AND with an immediate of FF). 7003 */ 7004 if (fmt1_ins->immediate != 1) 7005 panic("%s: BMOV not supported\n", 7006 ahc_name(ahc)); 7007 fmt1_ins->opcode = AIC_OP_AND; 7008 fmt1_ins->immediate = 0xff; 7009 } 7010 fallthrough; 7011 case AIC_OP_ROL: 7012 if ((ahc->features & AHC_ULTRA2) != 0) { 7013 int i, count; 7014 7015 /* Calculate odd parity for the instruction */ 7016 for (i = 0, count = 0; i < 31; i++) { 7017 uint32_t mask; 7018 7019 mask = 0x01 << i; 7020 if ((instr.integer & mask) != 0) 7021 count++; 7022 } 7023 if ((count & 0x01) == 0) 7024 instr.format1.parity = 1; 7025 } else { 7026 /* Compress the instruction for older sequencers */ 7027 if (fmt3_ins != NULL) { 7028 instr.integer = 7029 fmt3_ins->immediate 7030 | (fmt3_ins->source << 8) 7031 | (fmt3_ins->address << 16) 7032 | (fmt3_ins->opcode << 25); 7033 } else { 7034 instr.integer = 7035 fmt1_ins->immediate 7036 | (fmt1_ins->source << 8) 7037 | (fmt1_ins->destination << 16) 7038 | (fmt1_ins->ret << 24) 7039 | (fmt1_ins->opcode << 25); 7040 } 7041 } 7042 /* The sequencer is a little endian cpu */ 7043 instr.integer = ahc_htole32(instr.integer); 7044 ahc_outsb(ahc, SEQRAM, instr.bytes, 4); 7045 break; 7046 default: 7047 panic("Unknown opcode encountered in seq program"); 7048 break; 7049 } 7050 } 7051 7052 int ahc_print_register(const ahc_reg_parse_entry_t * table,u_int num_entries,const char * name,u_int address,u_int value,u_int * cur_column,u_int wrap_point)7053 ahc_print_register(const ahc_reg_parse_entry_t *table, u_int num_entries, 7054 const char *name, u_int address, u_int value, 7055 u_int *cur_column, u_int wrap_point) 7056 { 7057 int printed; 7058 u_int printed_mask; 7059 7060 if (cur_column != NULL && *cur_column >= wrap_point) { 7061 printk("\n"); 7062 *cur_column = 0; 7063 } 7064 printed = printk("%s[0x%x]", name, value); 7065 if (table == NULL) { 7066 printed += printk(" "); 7067 *cur_column += printed; 7068 return (printed); 7069 } 7070 printed_mask = 0; 7071 while (printed_mask != 0xFF) { 7072 int entry; 7073 7074 for (entry = 0; entry < num_entries; entry++) { 7075 if (((value & table[entry].mask) 7076 != table[entry].value) 7077 || ((printed_mask & table[entry].mask) 7078 == table[entry].mask)) 7079 continue; 7080 7081 printed += printk("%s%s", 7082 printed_mask == 0 ? ":(" : "|", 7083 table[entry].name); 7084 printed_mask |= table[entry].mask; 7085 break; 7086 } 7087 if (entry >= num_entries) 7088 break; 7089 } 7090 if (printed_mask != 0) 7091 printed += printk(") "); 7092 else 7093 printed += printk(" "); 7094 if (cur_column != NULL) 7095 *cur_column += printed; 7096 return (printed); 7097 } 7098 7099 void ahc_dump_card_state(struct ahc_softc * ahc)7100 ahc_dump_card_state(struct ahc_softc *ahc) 7101 { 7102 struct scb *scb; 7103 struct scb_tailq *untagged_q; 7104 u_int cur_col; 7105 int paused; 7106 int target; 7107 int maxtarget; 7108 int i; 7109 uint8_t last_phase; 7110 uint8_t qinpos; 7111 uint8_t qintail; 7112 uint8_t qoutpos; 7113 uint8_t scb_index; 7114 uint8_t saved_scbptr; 7115 7116 if (ahc_is_paused(ahc)) { 7117 paused = 1; 7118 } else { 7119 paused = 0; 7120 ahc_pause(ahc); 7121 } 7122 7123 saved_scbptr = ahc_inb(ahc, SCBPTR); 7124 last_phase = ahc_inb(ahc, LASTPHASE); 7125 printk(">>>>>>>>>>>>>>>>>> Dump Card State Begins <<<<<<<<<<<<<<<<<\n" 7126 "%s: Dumping Card State %s, at SEQADDR 0x%x\n", 7127 ahc_name(ahc), ahc_lookup_phase_entry(last_phase)->phasemsg, 7128 ahc_inb(ahc, SEQADDR0) | (ahc_inb(ahc, SEQADDR1) << 8)); 7129 if (paused) 7130 printk("Card was paused\n"); 7131 printk("ACCUM = 0x%x, SINDEX = 0x%x, DINDEX = 0x%x, ARG_2 = 0x%x\n", 7132 ahc_inb(ahc, ACCUM), ahc_inb(ahc, SINDEX), ahc_inb(ahc, DINDEX), 7133 ahc_inb(ahc, ARG_2)); 7134 printk("HCNT = 0x%x SCBPTR = 0x%x\n", ahc_inb(ahc, HCNT), 7135 ahc_inb(ahc, SCBPTR)); 7136 cur_col = 0; 7137 if ((ahc->features & AHC_DT) != 0) 7138 ahc_scsiphase_print(ahc_inb(ahc, SCSIPHASE), &cur_col, 50); 7139 ahc_scsisigi_print(ahc_inb(ahc, SCSISIGI), &cur_col, 50); 7140 ahc_error_print(ahc_inb(ahc, ERROR), &cur_col, 50); 7141 ahc_scsibusl_print(ahc_inb(ahc, SCSIBUSL), &cur_col, 50); 7142 ahc_lastphase_print(ahc_inb(ahc, LASTPHASE), &cur_col, 50); 7143 ahc_scsiseq_print(ahc_inb(ahc, SCSISEQ), &cur_col, 50); 7144 ahc_sblkctl_print(ahc_inb(ahc, SBLKCTL), &cur_col, 50); 7145 ahc_scsirate_print(ahc_inb(ahc, SCSIRATE), &cur_col, 50); 7146 ahc_seqctl_print(ahc_inb(ahc, SEQCTL), &cur_col, 50); 7147 ahc_seq_flags_print(ahc_inb(ahc, SEQ_FLAGS), &cur_col, 50); 7148 ahc_sstat0_print(ahc_inb(ahc, SSTAT0), &cur_col, 50); 7149 ahc_sstat1_print(ahc_inb(ahc, SSTAT1), &cur_col, 50); 7150 ahc_sstat2_print(ahc_inb(ahc, SSTAT2), &cur_col, 50); 7151 ahc_sstat3_print(ahc_inb(ahc, SSTAT3), &cur_col, 50); 7152 ahc_simode0_print(ahc_inb(ahc, SIMODE0), &cur_col, 50); 7153 ahc_simode1_print(ahc_inb(ahc, SIMODE1), &cur_col, 50); 7154 ahc_sxfrctl0_print(ahc_inb(ahc, SXFRCTL0), &cur_col, 50); 7155 ahc_dfcntrl_print(ahc_inb(ahc, DFCNTRL), &cur_col, 50); 7156 ahc_dfstatus_print(ahc_inb(ahc, DFSTATUS), &cur_col, 50); 7157 if (cur_col != 0) 7158 printk("\n"); 7159 printk("STACK:"); 7160 for (i = 0; i < STACK_SIZE; i++) 7161 printk(" 0x%x", ahc_inb(ahc, STACK)|(ahc_inb(ahc, STACK) << 8)); 7162 printk("\nSCB count = %d\n", ahc->scb_data->numscbs); 7163 printk("Kernel NEXTQSCB = %d\n", ahc->next_queued_scb->hscb->tag); 7164 printk("Card NEXTQSCB = %d\n", ahc_inb(ahc, NEXT_QUEUED_SCB)); 7165 /* QINFIFO */ 7166 printk("QINFIFO entries: "); 7167 if ((ahc->features & AHC_QUEUE_REGS) != 0) { 7168 qinpos = ahc_inb(ahc, SNSCB_QOFF); 7169 ahc_outb(ahc, SNSCB_QOFF, qinpos); 7170 } else 7171 qinpos = ahc_inb(ahc, QINPOS); 7172 qintail = ahc->qinfifonext; 7173 while (qinpos != qintail) { 7174 printk("%d ", ahc->qinfifo[qinpos]); 7175 qinpos++; 7176 } 7177 printk("\n"); 7178 7179 printk("Waiting Queue entries: "); 7180 scb_index = ahc_inb(ahc, WAITING_SCBH); 7181 i = 0; 7182 while (scb_index != SCB_LIST_NULL && i++ < 256) { 7183 ahc_outb(ahc, SCBPTR, scb_index); 7184 printk("%d:%d ", scb_index, ahc_inb(ahc, SCB_TAG)); 7185 scb_index = ahc_inb(ahc, SCB_NEXT); 7186 } 7187 printk("\n"); 7188 7189 printk("Disconnected Queue entries: "); 7190 scb_index = ahc_inb(ahc, DISCONNECTED_SCBH); 7191 i = 0; 7192 while (scb_index != SCB_LIST_NULL && i++ < 256) { 7193 ahc_outb(ahc, SCBPTR, scb_index); 7194 printk("%d:%d ", scb_index, ahc_inb(ahc, SCB_TAG)); 7195 scb_index = ahc_inb(ahc, SCB_NEXT); 7196 } 7197 printk("\n"); 7198 7199 ahc_sync_qoutfifo(ahc, BUS_DMASYNC_POSTREAD); 7200 printk("QOUTFIFO entries: "); 7201 qoutpos = ahc->qoutfifonext; 7202 i = 0; 7203 while (ahc->qoutfifo[qoutpos] != SCB_LIST_NULL && i++ < 256) { 7204 printk("%d ", ahc->qoutfifo[qoutpos]); 7205 qoutpos++; 7206 } 7207 printk("\n"); 7208 7209 printk("Sequencer Free SCB List: "); 7210 scb_index = ahc_inb(ahc, FREE_SCBH); 7211 i = 0; 7212 while (scb_index != SCB_LIST_NULL && i++ < 256) { 7213 ahc_outb(ahc, SCBPTR, scb_index); 7214 printk("%d ", scb_index); 7215 scb_index = ahc_inb(ahc, SCB_NEXT); 7216 } 7217 printk("\n"); 7218 7219 printk("Sequencer SCB Info: "); 7220 for (i = 0; i < ahc->scb_data->maxhscbs; i++) { 7221 ahc_outb(ahc, SCBPTR, i); 7222 cur_col = printk("\n%3d ", i); 7223 7224 ahc_scb_control_print(ahc_inb(ahc, SCB_CONTROL), &cur_col, 60); 7225 ahc_scb_scsiid_print(ahc_inb(ahc, SCB_SCSIID), &cur_col, 60); 7226 ahc_scb_lun_print(ahc_inb(ahc, SCB_LUN), &cur_col, 60); 7227 ahc_scb_tag_print(ahc_inb(ahc, SCB_TAG), &cur_col, 60); 7228 } 7229 printk("\n"); 7230 7231 printk("Pending list: "); 7232 i = 0; 7233 LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) { 7234 if (i++ > 256) 7235 break; 7236 cur_col = printk("\n%3d ", scb->hscb->tag); 7237 ahc_scb_control_print(scb->hscb->control, &cur_col, 60); 7238 ahc_scb_scsiid_print(scb->hscb->scsiid, &cur_col, 60); 7239 ahc_scb_lun_print(scb->hscb->lun, &cur_col, 60); 7240 if ((ahc->flags & AHC_PAGESCBS) == 0) { 7241 ahc_outb(ahc, SCBPTR, scb->hscb->tag); 7242 printk("("); 7243 ahc_scb_control_print(ahc_inb(ahc, SCB_CONTROL), 7244 &cur_col, 60); 7245 ahc_scb_tag_print(ahc_inb(ahc, SCB_TAG), &cur_col, 60); 7246 printk(")"); 7247 } 7248 } 7249 printk("\n"); 7250 7251 printk("Kernel Free SCB list: "); 7252 i = 0; 7253 SLIST_FOREACH(scb, &ahc->scb_data->free_scbs, links.sle) { 7254 if (i++ > 256) 7255 break; 7256 printk("%d ", scb->hscb->tag); 7257 } 7258 printk("\n"); 7259 7260 maxtarget = (ahc->features & (AHC_WIDE|AHC_TWIN)) ? 15 : 7; 7261 for (target = 0; target <= maxtarget; target++) { 7262 untagged_q = &ahc->untagged_queues[target]; 7263 if (TAILQ_FIRST(untagged_q) == NULL) 7264 continue; 7265 printk("Untagged Q(%d): ", target); 7266 i = 0; 7267 TAILQ_FOREACH(scb, untagged_q, links.tqe) { 7268 if (i++ > 256) 7269 break; 7270 printk("%d ", scb->hscb->tag); 7271 } 7272 printk("\n"); 7273 } 7274 7275 printk("\n<<<<<<<<<<<<<<<<< Dump Card State Ends >>>>>>>>>>>>>>>>>>\n"); 7276 ahc_outb(ahc, SCBPTR, saved_scbptr); 7277 if (paused == 0) 7278 ahc_unpause(ahc); 7279 } 7280 7281 /************************* Target Mode ****************************************/ 7282 #ifdef AHC_TARGET_MODE 7283 cam_status ahc_find_tmode_devs(struct ahc_softc * ahc,struct cam_sim * sim,union ccb * ccb,struct ahc_tmode_tstate ** tstate,struct ahc_tmode_lstate ** lstate,int notfound_failure)7284 ahc_find_tmode_devs(struct ahc_softc *ahc, struct cam_sim *sim, union ccb *ccb, 7285 struct ahc_tmode_tstate **tstate, 7286 struct ahc_tmode_lstate **lstate, 7287 int notfound_failure) 7288 { 7289 7290 if ((ahc->features & AHC_TARGETMODE) == 0) 7291 return (CAM_REQ_INVALID); 7292 7293 /* 7294 * Handle the 'black hole' device that sucks up 7295 * requests to unattached luns on enabled targets. 7296 */ 7297 if (ccb->ccb_h.target_id == CAM_TARGET_WILDCARD 7298 && ccb->ccb_h.target_lun == CAM_LUN_WILDCARD) { 7299 *tstate = NULL; 7300 *lstate = ahc->black_hole; 7301 } else { 7302 u_int max_id; 7303 7304 max_id = (ahc->features & AHC_WIDE) ? 16 : 8; 7305 if (ccb->ccb_h.target_id >= max_id) 7306 return (CAM_TID_INVALID); 7307 7308 if (ccb->ccb_h.target_lun >= AHC_NUM_LUNS) 7309 return (CAM_LUN_INVALID); 7310 7311 *tstate = ahc->enabled_targets[ccb->ccb_h.target_id]; 7312 *lstate = NULL; 7313 if (*tstate != NULL) 7314 *lstate = 7315 (*tstate)->enabled_luns[ccb->ccb_h.target_lun]; 7316 } 7317 7318 if (notfound_failure != 0 && *lstate == NULL) 7319 return (CAM_PATH_INVALID); 7320 7321 return (CAM_REQ_CMP); 7322 } 7323 7324 void ahc_handle_en_lun(struct ahc_softc * ahc,struct cam_sim * sim,union ccb * ccb)7325 ahc_handle_en_lun(struct ahc_softc *ahc, struct cam_sim *sim, union ccb *ccb) 7326 { 7327 struct ahc_tmode_tstate *tstate; 7328 struct ahc_tmode_lstate *lstate; 7329 struct ccb_en_lun *cel; 7330 cam_status status; 7331 u_long s; 7332 u_int target; 7333 u_int lun; 7334 u_int target_mask; 7335 u_int our_id; 7336 int error; 7337 char channel; 7338 7339 status = ahc_find_tmode_devs(ahc, sim, ccb, &tstate, &lstate, 7340 /*notfound_failure*/FALSE); 7341 7342 if (status != CAM_REQ_CMP) { 7343 ccb->ccb_h.status = status; 7344 return; 7345 } 7346 7347 if (cam_sim_bus(sim) == 0) 7348 our_id = ahc->our_id; 7349 else 7350 our_id = ahc->our_id_b; 7351 7352 if (ccb->ccb_h.target_id != our_id) { 7353 /* 7354 * our_id represents our initiator ID, or 7355 * the ID of the first target to have an 7356 * enabled lun in target mode. There are 7357 * two cases that may preclude enabling a 7358 * target id other than our_id. 7359 * 7360 * o our_id is for an active initiator role. 7361 * Since the hardware does not support 7362 * reselections to the initiator role at 7363 * anything other than our_id, and our_id 7364 * is used by the hardware to indicate the 7365 * ID to use for both select-out and 7366 * reselect-out operations, the only target 7367 * ID we can support in this mode is our_id. 7368 * 7369 * o The MULTARGID feature is not available and 7370 * a previous target mode ID has been enabled. 7371 */ 7372 if ((ahc->features & AHC_MULTIROLE) != 0) { 7373 7374 if ((ahc->features & AHC_MULTI_TID) != 0 7375 && (ahc->flags & AHC_INITIATORROLE) != 0) { 7376 /* 7377 * Only allow additional targets if 7378 * the initiator role is disabled. 7379 * The hardware cannot handle a re-select-in 7380 * on the initiator id during a re-select-out 7381 * on a different target id. 7382 */ 7383 status = CAM_TID_INVALID; 7384 } else if ((ahc->flags & AHC_INITIATORROLE) != 0 7385 || ahc->enabled_luns > 0) { 7386 /* 7387 * Only allow our target id to change 7388 * if the initiator role is not configured 7389 * and there are no enabled luns which 7390 * are attached to the currently registered 7391 * scsi id. 7392 */ 7393 status = CAM_TID_INVALID; 7394 } 7395 } else if ((ahc->features & AHC_MULTI_TID) == 0 7396 && ahc->enabled_luns > 0) { 7397 7398 status = CAM_TID_INVALID; 7399 } 7400 } 7401 7402 if (status != CAM_REQ_CMP) { 7403 ccb->ccb_h.status = status; 7404 return; 7405 } 7406 7407 /* 7408 * We now have an id that is valid. 7409 * If we aren't in target mode, switch modes. 7410 */ 7411 if ((ahc->flags & AHC_TARGETROLE) == 0 7412 && ccb->ccb_h.target_id != CAM_TARGET_WILDCARD) { 7413 u_long s; 7414 ahc_flag saved_flags; 7415 7416 printk("Configuring Target Mode\n"); 7417 ahc_lock(ahc, &s); 7418 if (LIST_FIRST(&ahc->pending_scbs) != NULL) { 7419 ccb->ccb_h.status = CAM_BUSY; 7420 ahc_unlock(ahc, &s); 7421 return; 7422 } 7423 saved_flags = ahc->flags; 7424 ahc->flags |= AHC_TARGETROLE; 7425 if ((ahc->features & AHC_MULTIROLE) == 0) 7426 ahc->flags &= ~AHC_INITIATORROLE; 7427 ahc_pause(ahc); 7428 error = ahc_loadseq(ahc); 7429 if (error != 0) { 7430 /* 7431 * Restore original configuration and notify 7432 * the caller that we cannot support target mode. 7433 * Since the adapter started out in this 7434 * configuration, the firmware load will succeed, 7435 * so there is no point in checking ahc_loadseq's 7436 * return value. 7437 */ 7438 ahc->flags = saved_flags; 7439 (void)ahc_loadseq(ahc); 7440 ahc_restart(ahc); 7441 ahc_unlock(ahc, &s); 7442 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 7443 return; 7444 } 7445 ahc_restart(ahc); 7446 ahc_unlock(ahc, &s); 7447 } 7448 cel = &ccb->cel; 7449 target = ccb->ccb_h.target_id; 7450 lun = ccb->ccb_h.target_lun; 7451 channel = SIM_CHANNEL(ahc, sim); 7452 target_mask = 0x01 << target; 7453 if (channel == 'B') 7454 target_mask <<= 8; 7455 7456 if (cel->enable != 0) { 7457 u_int scsiseq; 7458 7459 /* Are we already enabled?? */ 7460 if (lstate != NULL) { 7461 xpt_print_path(ccb->ccb_h.path); 7462 printk("Lun already enabled\n"); 7463 ccb->ccb_h.status = CAM_LUN_ALRDY_ENA; 7464 return; 7465 } 7466 7467 if (cel->grp6_len != 0 7468 || cel->grp7_len != 0) { 7469 /* 7470 * Don't (yet?) support vendor 7471 * specific commands. 7472 */ 7473 ccb->ccb_h.status = CAM_REQ_INVALID; 7474 printk("Non-zero Group Codes\n"); 7475 return; 7476 } 7477 7478 /* 7479 * Seems to be okay. 7480 * Setup our data structures. 7481 */ 7482 if (target != CAM_TARGET_WILDCARD && tstate == NULL) { 7483 tstate = ahc_alloc_tstate(ahc, target, channel); 7484 if (tstate == NULL) { 7485 xpt_print_path(ccb->ccb_h.path); 7486 printk("Couldn't allocate tstate\n"); 7487 ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 7488 return; 7489 } 7490 } 7491 lstate = kzalloc(sizeof(*lstate), GFP_ATOMIC); 7492 if (lstate == NULL) { 7493 xpt_print_path(ccb->ccb_h.path); 7494 printk("Couldn't allocate lstate\n"); 7495 ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 7496 return; 7497 } 7498 status = xpt_create_path(&lstate->path, /*periph*/NULL, 7499 xpt_path_path_id(ccb->ccb_h.path), 7500 xpt_path_target_id(ccb->ccb_h.path), 7501 xpt_path_lun_id(ccb->ccb_h.path)); 7502 if (status != CAM_REQ_CMP) { 7503 kfree(lstate); 7504 xpt_print_path(ccb->ccb_h.path); 7505 printk("Couldn't allocate path\n"); 7506 ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 7507 return; 7508 } 7509 SLIST_INIT(&lstate->accept_tios); 7510 SLIST_INIT(&lstate->immed_notifies); 7511 ahc_lock(ahc, &s); 7512 ahc_pause(ahc); 7513 if (target != CAM_TARGET_WILDCARD) { 7514 tstate->enabled_luns[lun] = lstate; 7515 ahc->enabled_luns++; 7516 7517 if ((ahc->features & AHC_MULTI_TID) != 0) { 7518 u_int targid_mask; 7519 7520 targid_mask = ahc_inb(ahc, TARGID) 7521 | (ahc_inb(ahc, TARGID + 1) << 8); 7522 7523 targid_mask |= target_mask; 7524 ahc_outb(ahc, TARGID, targid_mask); 7525 ahc_outb(ahc, TARGID+1, (targid_mask >> 8)); 7526 ahc_update_scsiid(ahc, targid_mask); 7527 } else { 7528 u_int our_id; 7529 char channel; 7530 7531 channel = SIM_CHANNEL(ahc, sim); 7532 our_id = SIM_SCSI_ID(ahc, sim); 7533 7534 /* 7535 * This can only happen if selections 7536 * are not enabled 7537 */ 7538 if (target != our_id) { 7539 u_int sblkctl; 7540 char cur_channel; 7541 int swap; 7542 7543 sblkctl = ahc_inb(ahc, SBLKCTL); 7544 cur_channel = (sblkctl & SELBUSB) 7545 ? 'B' : 'A'; 7546 if ((ahc->features & AHC_TWIN) == 0) 7547 cur_channel = 'A'; 7548 swap = cur_channel != channel; 7549 if (channel == 'A') 7550 ahc->our_id = target; 7551 else 7552 ahc->our_id_b = target; 7553 7554 if (swap) 7555 ahc_outb(ahc, SBLKCTL, 7556 sblkctl ^ SELBUSB); 7557 7558 ahc_outb(ahc, SCSIID, target); 7559 7560 if (swap) 7561 ahc_outb(ahc, SBLKCTL, sblkctl); 7562 } 7563 } 7564 } else 7565 ahc->black_hole = lstate; 7566 /* Allow select-in operations */ 7567 if (ahc->black_hole != NULL && ahc->enabled_luns > 0) { 7568 scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE); 7569 scsiseq |= ENSELI; 7570 ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq); 7571 scsiseq = ahc_inb(ahc, SCSISEQ); 7572 scsiseq |= ENSELI; 7573 ahc_outb(ahc, SCSISEQ, scsiseq); 7574 } 7575 ahc_unpause(ahc); 7576 ahc_unlock(ahc, &s); 7577 ccb->ccb_h.status = CAM_REQ_CMP; 7578 xpt_print_path(ccb->ccb_h.path); 7579 printk("Lun now enabled for target mode\n"); 7580 } else { 7581 struct scb *scb; 7582 int i, empty; 7583 7584 if (lstate == NULL) { 7585 ccb->ccb_h.status = CAM_LUN_INVALID; 7586 return; 7587 } 7588 7589 ahc_lock(ahc, &s); 7590 7591 ccb->ccb_h.status = CAM_REQ_CMP; 7592 LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) { 7593 struct ccb_hdr *ccbh; 7594 7595 ccbh = &scb->io_ctx->ccb_h; 7596 if (ccbh->func_code == XPT_CONT_TARGET_IO 7597 && !xpt_path_comp(ccbh->path, ccb->ccb_h.path)){ 7598 printk("CTIO pending\n"); 7599 ccb->ccb_h.status = CAM_REQ_INVALID; 7600 ahc_unlock(ahc, &s); 7601 return; 7602 } 7603 } 7604 7605 if (SLIST_FIRST(&lstate->accept_tios) != NULL) { 7606 printk("ATIOs pending\n"); 7607 ccb->ccb_h.status = CAM_REQ_INVALID; 7608 } 7609 7610 if (SLIST_FIRST(&lstate->immed_notifies) != NULL) { 7611 printk("INOTs pending\n"); 7612 ccb->ccb_h.status = CAM_REQ_INVALID; 7613 } 7614 7615 if (ccb->ccb_h.status != CAM_REQ_CMP) { 7616 ahc_unlock(ahc, &s); 7617 return; 7618 } 7619 7620 xpt_print_path(ccb->ccb_h.path); 7621 printk("Target mode disabled\n"); 7622 xpt_free_path(lstate->path); 7623 kfree(lstate); 7624 7625 ahc_pause(ahc); 7626 /* Can we clean up the target too? */ 7627 if (target != CAM_TARGET_WILDCARD) { 7628 tstate->enabled_luns[lun] = NULL; 7629 ahc->enabled_luns--; 7630 for (empty = 1, i = 0; i < 8; i++) 7631 if (tstate->enabled_luns[i] != NULL) { 7632 empty = 0; 7633 break; 7634 } 7635 7636 if (empty) { 7637 ahc_free_tstate(ahc, target, channel, 7638 /*force*/FALSE); 7639 if (ahc->features & AHC_MULTI_TID) { 7640 u_int targid_mask; 7641 7642 targid_mask = ahc_inb(ahc, TARGID) 7643 | (ahc_inb(ahc, TARGID + 1) 7644 << 8); 7645 7646 targid_mask &= ~target_mask; 7647 ahc_outb(ahc, TARGID, targid_mask); 7648 ahc_outb(ahc, TARGID+1, 7649 (targid_mask >> 8)); 7650 ahc_update_scsiid(ahc, targid_mask); 7651 } 7652 } 7653 } else { 7654 7655 ahc->black_hole = NULL; 7656 7657 /* 7658 * We can't allow selections without 7659 * our black hole device. 7660 */ 7661 empty = TRUE; 7662 } 7663 if (ahc->enabled_luns == 0) { 7664 /* Disallow select-in */ 7665 u_int scsiseq; 7666 7667 scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE); 7668 scsiseq &= ~ENSELI; 7669 ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq); 7670 scsiseq = ahc_inb(ahc, SCSISEQ); 7671 scsiseq &= ~ENSELI; 7672 ahc_outb(ahc, SCSISEQ, scsiseq); 7673 7674 if ((ahc->features & AHC_MULTIROLE) == 0) { 7675 printk("Configuring Initiator Mode\n"); 7676 ahc->flags &= ~AHC_TARGETROLE; 7677 ahc->flags |= AHC_INITIATORROLE; 7678 /* 7679 * Returning to a configuration that 7680 * fit previously will always succeed. 7681 */ 7682 (void)ahc_loadseq(ahc); 7683 ahc_restart(ahc); 7684 /* 7685 * Unpaused. The extra unpause 7686 * that follows is harmless. 7687 */ 7688 } 7689 } 7690 ahc_unpause(ahc); 7691 ahc_unlock(ahc, &s); 7692 } 7693 } 7694 7695 static void ahc_update_scsiid(struct ahc_softc * ahc,u_int targid_mask)7696 ahc_update_scsiid(struct ahc_softc *ahc, u_int targid_mask) 7697 { 7698 u_int scsiid_mask; 7699 u_int scsiid; 7700 7701 if ((ahc->features & AHC_MULTI_TID) == 0) 7702 panic("ahc_update_scsiid called on non-multitid unit\n"); 7703 7704 /* 7705 * Since we will rely on the TARGID mask 7706 * for selection enables, ensure that OID 7707 * in SCSIID is not set to some other ID 7708 * that we don't want to allow selections on. 7709 */ 7710 if ((ahc->features & AHC_ULTRA2) != 0) 7711 scsiid = ahc_inb(ahc, SCSIID_ULTRA2); 7712 else 7713 scsiid = ahc_inb(ahc, SCSIID); 7714 scsiid_mask = 0x1 << (scsiid & OID); 7715 if ((targid_mask & scsiid_mask) == 0) { 7716 u_int our_id; 7717 7718 /* ffs counts from 1 */ 7719 our_id = ffs(targid_mask); 7720 if (our_id == 0) 7721 our_id = ahc->our_id; 7722 else 7723 our_id--; 7724 scsiid &= TID; 7725 scsiid |= our_id; 7726 } 7727 if ((ahc->features & AHC_ULTRA2) != 0) 7728 ahc_outb(ahc, SCSIID_ULTRA2, scsiid); 7729 else 7730 ahc_outb(ahc, SCSIID, scsiid); 7731 } 7732 7733 static void ahc_run_tqinfifo(struct ahc_softc * ahc,int paused)7734 ahc_run_tqinfifo(struct ahc_softc *ahc, int paused) 7735 { 7736 struct target_cmd *cmd; 7737 7738 /* 7739 * If the card supports auto-access pause, 7740 * we can access the card directly regardless 7741 * of whether it is paused or not. 7742 */ 7743 if ((ahc->features & AHC_AUTOPAUSE) != 0) 7744 paused = TRUE; 7745 7746 ahc_sync_tqinfifo(ahc, BUS_DMASYNC_POSTREAD); 7747 while ((cmd = &ahc->targetcmds[ahc->tqinfifonext])->cmd_valid != 0) { 7748 7749 /* 7750 * Only advance through the queue if we 7751 * have the resources to process the command. 7752 */ 7753 if (ahc_handle_target_cmd(ahc, cmd) != 0) 7754 break; 7755 7756 cmd->cmd_valid = 0; 7757 ahc_dmamap_sync(ahc, ahc->shared_data_dmat, 7758 ahc->shared_data_dmamap, 7759 ahc_targetcmd_offset(ahc, ahc->tqinfifonext), 7760 sizeof(struct target_cmd), 7761 BUS_DMASYNC_PREREAD); 7762 ahc->tqinfifonext++; 7763 7764 /* 7765 * Lazily update our position in the target mode incoming 7766 * command queue as seen by the sequencer. 7767 */ 7768 if ((ahc->tqinfifonext & (HOST_TQINPOS - 1)) == 1) { 7769 if ((ahc->features & AHC_HS_MAILBOX) != 0) { 7770 u_int hs_mailbox; 7771 7772 hs_mailbox = ahc_inb(ahc, HS_MAILBOX); 7773 hs_mailbox &= ~HOST_TQINPOS; 7774 hs_mailbox |= ahc->tqinfifonext & HOST_TQINPOS; 7775 ahc_outb(ahc, HS_MAILBOX, hs_mailbox); 7776 } else { 7777 if (!paused) 7778 ahc_pause(ahc); 7779 ahc_outb(ahc, KERNEL_TQINPOS, 7780 ahc->tqinfifonext & HOST_TQINPOS); 7781 if (!paused) 7782 ahc_unpause(ahc); 7783 } 7784 } 7785 } 7786 } 7787 7788 static int ahc_handle_target_cmd(struct ahc_softc * ahc,struct target_cmd * cmd)7789 ahc_handle_target_cmd(struct ahc_softc *ahc, struct target_cmd *cmd) 7790 { 7791 struct ahc_tmode_tstate *tstate; 7792 struct ahc_tmode_lstate *lstate; 7793 struct ccb_accept_tio *atio; 7794 uint8_t *byte; 7795 int initiator; 7796 int target; 7797 int lun; 7798 7799 initiator = SCSIID_TARGET(ahc, cmd->scsiid); 7800 target = SCSIID_OUR_ID(cmd->scsiid); 7801 lun = (cmd->identify & MSG_IDENTIFY_LUNMASK); 7802 7803 byte = cmd->bytes; 7804 tstate = ahc->enabled_targets[target]; 7805 lstate = NULL; 7806 if (tstate != NULL) 7807 lstate = tstate->enabled_luns[lun]; 7808 7809 /* 7810 * Commands for disabled luns go to the black hole driver. 7811 */ 7812 if (lstate == NULL) 7813 lstate = ahc->black_hole; 7814 7815 atio = (struct ccb_accept_tio*)SLIST_FIRST(&lstate->accept_tios); 7816 if (atio == NULL) { 7817 ahc->flags |= AHC_TQINFIFO_BLOCKED; 7818 /* 7819 * Wait for more ATIOs from the peripheral driver for this lun. 7820 */ 7821 if (bootverbose) 7822 printk("%s: ATIOs exhausted\n", ahc_name(ahc)); 7823 return (1); 7824 } else 7825 ahc->flags &= ~AHC_TQINFIFO_BLOCKED; 7826 #if 0 7827 printk("Incoming command from %d for %d:%d%s\n", 7828 initiator, target, lun, 7829 lstate == ahc->black_hole ? "(Black Holed)" : ""); 7830 #endif 7831 SLIST_REMOVE_HEAD(&lstate->accept_tios, sim_links.sle); 7832 7833 if (lstate == ahc->black_hole) { 7834 /* Fill in the wildcards */ 7835 atio->ccb_h.target_id = target; 7836 atio->ccb_h.target_lun = lun; 7837 } 7838 7839 /* 7840 * Package it up and send it off to 7841 * whomever has this lun enabled. 7842 */ 7843 atio->sense_len = 0; 7844 atio->init_id = initiator; 7845 if (byte[0] != 0xFF) { 7846 /* Tag was included */ 7847 atio->tag_action = *byte++; 7848 atio->tag_id = *byte++; 7849 atio->ccb_h.flags = CAM_TAG_ACTION_VALID; 7850 } else { 7851 atio->ccb_h.flags = 0; 7852 } 7853 byte++; 7854 7855 /* Okay. Now determine the cdb size based on the command code */ 7856 switch (*byte >> CMD_GROUP_CODE_SHIFT) { 7857 case 0: 7858 atio->cdb_len = 6; 7859 break; 7860 case 1: 7861 case 2: 7862 atio->cdb_len = 10; 7863 break; 7864 case 4: 7865 atio->cdb_len = 16; 7866 break; 7867 case 5: 7868 atio->cdb_len = 12; 7869 break; 7870 case 3: 7871 default: 7872 /* Only copy the opcode. */ 7873 atio->cdb_len = 1; 7874 printk("Reserved or VU command code type encountered\n"); 7875 break; 7876 } 7877 7878 memcpy(atio->cdb_io.cdb_bytes, byte, atio->cdb_len); 7879 7880 atio->ccb_h.status |= CAM_CDB_RECVD; 7881 7882 if ((cmd->identify & MSG_IDENTIFY_DISCFLAG) == 0) { 7883 /* 7884 * We weren't allowed to disconnect. 7885 * We're hanging on the bus until a 7886 * continue target I/O comes in response 7887 * to this accept tio. 7888 */ 7889 #if 0 7890 printk("Received Immediate Command %d:%d:%d - %p\n", 7891 initiator, target, lun, ahc->pending_device); 7892 #endif 7893 ahc->pending_device = lstate; 7894 ahc_freeze_ccb((union ccb *)atio); 7895 atio->ccb_h.flags |= CAM_DIS_DISCONNECT; 7896 } 7897 xpt_done((union ccb*)atio); 7898 return (0); 7899 } 7900 7901 #endif 7902