1 /* 2 * Adaptec AIC7xxx device driver for Linux. 3 * 4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $ 5 * 6 * Copyright (c) 1994 John Aycock 7 * The University of Calgary Department of Computer Science. 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2, or (at your option) 12 * any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; see the file COPYING. If not, write to 21 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 22 * 23 * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F 24 * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA 25 * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide, 26 * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux, 27 * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file 28 * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual, 29 * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the 30 * ANSI SCSI-2 specification (draft 10c), ... 31 * 32 * -------------------------------------------------------------------------- 33 * 34 * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org): 35 * 36 * Substantially modified to include support for wide and twin bus 37 * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes, 38 * SCB paging, and other rework of the code. 39 * 40 * -------------------------------------------------------------------------- 41 * Copyright (c) 1994-2000 Justin T. Gibbs. 42 * Copyright (c) 2000-2001 Adaptec Inc. 43 * All rights reserved. 44 * 45 * Redistribution and use in source and binary forms, with or without 46 * modification, are permitted provided that the following conditions 47 * are met: 48 * 1. Redistributions of source code must retain the above copyright 49 * notice, this list of conditions, and the following disclaimer, 50 * without modification. 51 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 52 * substantially similar to the "NO WARRANTY" disclaimer below 53 * ("Disclaimer") and any redistribution must be conditioned upon 54 * including a substantially similar Disclaimer requirement for further 55 * binary redistribution. 56 * 3. Neither the names of the above-listed copyright holders nor the names 57 * of any contributors may be used to endorse or promote products derived 58 * from this software without specific prior written permission. 59 * 60 * Alternatively, this software may be distributed under the terms of the 61 * GNU General Public License ("GPL") version 2 as published by the Free 62 * Software Foundation. 63 * 64 * NO WARRANTY 65 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 66 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 67 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 68 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 69 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 70 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 71 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 72 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 73 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 74 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 75 * POSSIBILITY OF SUCH DAMAGES. 76 * 77 *--------------------------------------------------------------------------- 78 * 79 * Thanks also go to (in alphabetical order) the following: 80 * 81 * Rory Bolt - Sequencer bug fixes 82 * Jay Estabrook - Initial DEC Alpha support 83 * Doug Ledford - Much needed abort/reset bug fixes 84 * Kai Makisara - DMAing of SCBs 85 * 86 * A Boot time option was also added for not resetting the scsi bus. 87 * 88 * Form: aic7xxx=extended 89 * aic7xxx=no_reset 90 * aic7xxx=verbose 91 * 92 * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97 93 * 94 * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp 95 */ 96 97 /* 98 * Further driver modifications made by Doug Ledford <dledford@redhat.com> 99 * 100 * Copyright (c) 1997-1999 Doug Ledford 101 * 102 * These changes are released under the same licensing terms as the FreeBSD 103 * driver written by Justin Gibbs. Please see his Copyright notice above 104 * for the exact terms and conditions covering my changes as well as the 105 * warranty statement. 106 * 107 * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include 108 * but are not limited to: 109 * 110 * 1: Import of the latest FreeBSD sequencer code for this driver 111 * 2: Modification of kernel code to accommodate different sequencer semantics 112 * 3: Extensive changes throughout kernel portion of driver to improve 113 * abort/reset processing and error hanndling 114 * 4: Other work contributed by various people on the Internet 115 * 5: Changes to printk information and verbosity selection code 116 * 6: General reliability related changes, especially in IRQ management 117 * 7: Modifications to the default probe/attach order for supported cards 118 * 8: SMP friendliness has been improved 119 * 120 */ 121 122 #include "aic7xxx_osm.h" 123 #include "aic7xxx_inline.h" 124 #include <scsi/scsicam.h> 125 126 static struct scsi_transport_template *ahc_linux_transport_template = NULL; 127 128 #include <linux/init.h> /* __setup */ 129 #include <linux/mm.h> /* For fetching system memory size */ 130 #include <linux/blkdev.h> /* For block_size() */ 131 #include <linux/delay.h> /* For ssleep/msleep */ 132 133 134 /* 135 * Set this to the delay in seconds after SCSI bus reset. 136 * Note, we honor this only for the initial bus reset. 137 * The scsi error recovery code performs its own bus settle 138 * delay handling for error recovery actions. 139 */ 140 #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS 141 #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS 142 #else 143 #define AIC7XXX_RESET_DELAY 5000 144 #endif 145 146 /* 147 * Control collection of SCSI transfer statistics for the /proc filesystem. 148 * 149 * NOTE: Do NOT enable this when running on kernels version 1.2.x and below. 150 * NOTE: This does affect performance since it has to maintain statistics. 151 */ 152 #ifdef CONFIG_AIC7XXX_PROC_STATS 153 #define AIC7XXX_PROC_STATS 154 #endif 155 156 /* 157 * To change the default number of tagged transactions allowed per-device, 158 * add a line to the lilo.conf file like: 159 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" 160 * which will result in the first four devices on the first two 161 * controllers being set to a tagged queue depth of 32. 162 * 163 * The tag_commands is an array of 16 to allow for wide and twin adapters. 164 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 165 * for channel 1. 166 */ 167 typedef struct { 168 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */ 169 } adapter_tag_info_t; 170 171 /* 172 * Modify this as you see fit for your system. 173 * 174 * 0 tagged queuing disabled 175 * 1 <= n <= 253 n == max tags ever dispatched. 176 * 177 * The driver will throttle the number of commands dispatched to a 178 * device if it returns queue full. For devices with a fixed maximum 179 * queue depth, the driver will eventually determine this depth and 180 * lock it in (a console message is printed to indicate that a lock 181 * has occurred). On some devices, queue full is returned for a temporary 182 * resource shortage. These devices will return queue full at varying 183 * depths. The driver will throttle back when the queue fulls occur and 184 * attempt to slowly increase the depth over time as the device recovers 185 * from the resource shortage. 186 * 187 * In this example, the first line will disable tagged queueing for all 188 * the devices on the first probed aic7xxx adapter. 189 * 190 * The second line enables tagged queueing with 4 commands/LUN for IDs 191 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the 192 * driver to attempt to use up to 64 tags for ID 1. 193 * 194 * The third line is the same as the first line. 195 * 196 * The fourth line disables tagged queueing for devices 0 and 3. It 197 * enables tagged queueing for the other IDs, with 16 commands/LUN 198 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for 199 * IDs 2, 5-7, and 9-15. 200 */ 201 202 /* 203 * NOTE: The below structure is for reference only, the actual structure 204 * to modify in order to change things is just below this comment block. 205 adapter_tag_info_t aic7xxx_tag_info[] = 206 { 207 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 208 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, 209 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 210 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} 211 }; 212 */ 213 214 #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE 215 #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE 216 #else 217 #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE 218 #endif 219 220 #define AIC7XXX_CONFIGED_TAG_COMMANDS { \ 221 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 222 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 223 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 224 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 225 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 226 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 227 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 228 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \ 229 } 230 231 /* 232 * By default, use the number of commands specified by 233 * the users kernel configuration. 234 */ 235 static adapter_tag_info_t aic7xxx_tag_info[] = 236 { 237 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 238 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 239 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 240 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 241 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 242 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 243 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 244 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 245 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 246 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 247 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 248 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 249 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 250 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 251 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 252 {AIC7XXX_CONFIGED_TAG_COMMANDS} 253 }; 254 255 /* 256 * There should be a specific return value for this in scsi.h, but 257 * it seems that most drivers ignore it. 258 */ 259 #define DID_UNDERFLOW DID_ERROR 260 261 void 262 ahc_print_path(struct ahc_softc *ahc, struct scb *scb) 263 { 264 printk("(scsi%d:%c:%d:%d): ", 265 ahc->platform_data->host->host_no, 266 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X', 267 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1, 268 scb != NULL ? SCB_GET_LUN(scb) : -1); 269 } 270 271 /* 272 * XXX - these options apply unilaterally to _all_ 274x/284x/294x 273 * cards in the system. This should be fixed. Exceptions to this 274 * rule are noted in the comments. 275 */ 276 277 /* 278 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This 279 * has no effect on any later resets that might occur due to things like 280 * SCSI bus timeouts. 281 */ 282 static uint32_t aic7xxx_no_reset; 283 284 /* 285 * Should we force EXTENDED translation on a controller. 286 * 0 == Use whatever is in the SEEPROM or default to off 287 * 1 == Use whatever is in the SEEPROM or default to on 288 */ 289 static uint32_t aic7xxx_extended; 290 291 /* 292 * PCI bus parity checking of the Adaptec controllers. This is somewhat 293 * dubious at best. To my knowledge, this option has never actually 294 * solved a PCI parity problem, but on certain machines with broken PCI 295 * chipset configurations where stray PCI transactions with bad parity are 296 * the norm rather than the exception, the error messages can be overwelming. 297 * It's included in the driver for completeness. 298 * 0 = Shut off PCI parity check 299 * non-0 = reverse polarity pci parity checking 300 */ 301 static uint32_t aic7xxx_pci_parity = ~0; 302 303 /* 304 * There are lots of broken chipsets in the world. Some of them will 305 * violate the PCI spec when we issue byte sized memory writes to our 306 * controller. I/O mapped register access, if allowed by the given 307 * platform, will work in almost all cases. 308 */ 309 uint32_t aic7xxx_allow_memio = ~0; 310 311 /* 312 * So that we can set how long each device is given as a selection timeout. 313 * The table of values goes like this: 314 * 0 - 256ms 315 * 1 - 128ms 316 * 2 - 64ms 317 * 3 - 32ms 318 * We default to 256ms because some older devices need a longer time 319 * to respond to initial selection. 320 */ 321 static uint32_t aic7xxx_seltime; 322 323 /* 324 * Certain devices do not perform any aging on commands. Should the 325 * device be saturated by commands in one portion of the disk, it is 326 * possible for transactions on far away sectors to never be serviced. 327 * To handle these devices, we can periodically send an ordered tag to 328 * force all outstanding transactions to be serviced prior to a new 329 * transaction. 330 */ 331 static uint32_t aic7xxx_periodic_otag; 332 333 /* 334 * Module information and settable options. 335 */ 336 static char *aic7xxx = NULL; 337 338 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>"); 339 MODULE_DESCRIPTION("Adaptec AIC77XX/78XX SCSI Host Bus Adapter driver"); 340 MODULE_LICENSE("Dual BSD/GPL"); 341 MODULE_VERSION(AIC7XXX_DRIVER_VERSION); 342 module_param(aic7xxx, charp, 0444); 343 MODULE_PARM_DESC(aic7xxx, 344 "period-delimited options string:\n" 345 " verbose Enable verbose/diagnostic logging\n" 346 " allow_memio Allow device registers to be memory mapped\n" 347 " debug Bitmask of debug values to enable\n" 348 " no_probe Toggle EISA/VLB controller probing\n" 349 " probe_eisa_vl Toggle EISA/VLB controller probing\n" 350 " no_reset Suppress initial bus resets\n" 351 " extended Enable extended geometry on all controllers\n" 352 " periodic_otag Send an ordered tagged transaction\n" 353 " periodically to prevent tag starvation.\n" 354 " This may be required by some older disk\n" 355 " drives or RAID arrays.\n" 356 " tag_info:<tag_str> Set per-target tag depth\n" 357 " global_tag_depth:<int> Global tag depth for every target\n" 358 " on every bus\n" 359 " seltime:<int> Selection Timeout\n" 360 " (0/256ms,1/128ms,2/64ms,3/32ms)\n" 361 "\n" 362 " Sample /etc/modprobe.conf line:\n" 363 " Toggle EISA/VLB probing\n" 364 " Set tag depth on Controller 1/Target 1 to 10 tags\n" 365 " Shorten the selection timeout to 128ms\n" 366 "\n" 367 " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n" 368 ); 369 370 static void ahc_linux_handle_scsi_status(struct ahc_softc *, 371 struct scsi_device *, 372 struct scb *); 373 static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, 374 struct scsi_cmnd *cmd); 375 static void ahc_linux_freeze_simq(struct ahc_softc *ahc); 376 static void ahc_linux_release_simq(struct ahc_softc *ahc); 377 static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag); 378 static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc); 379 static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc, 380 struct ahc_devinfo *devinfo); 381 static void ahc_linux_device_queue_depth(struct scsi_device *); 382 static int ahc_linux_run_command(struct ahc_softc*, 383 struct ahc_linux_device *, 384 struct scsi_cmnd *); 385 static void ahc_linux_setup_tag_info_global(char *p); 386 static int aic7xxx_setup(char *s); 387 388 static int ahc_linux_unit; 389 390 391 /********************************* Inlines ************************************/ 392 static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*); 393 394 static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, 395 struct ahc_dma_seg *sg, 396 dma_addr_t addr, bus_size_t len); 397 398 static __inline void 399 ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb) 400 { 401 struct scsi_cmnd *cmd; 402 403 cmd = scb->io_ctx; 404 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE); 405 406 scsi_dma_unmap(cmd); 407 } 408 409 static __inline int 410 ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, 411 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len) 412 { 413 int consumed; 414 415 if ((scb->sg_count + 1) > AHC_NSEG) 416 panic("Too few segs for dma mapping. " 417 "Increase AHC_NSEG\n"); 418 419 consumed = 1; 420 sg->addr = ahc_htole32(addr & 0xFFFFFFFF); 421 scb->platform_data->xfer_len += len; 422 423 if (sizeof(dma_addr_t) > 4 424 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0) 425 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK; 426 427 sg->len = ahc_htole32(len); 428 return (consumed); 429 } 430 431 /* 432 * Return a string describing the driver. 433 */ 434 static const char * 435 ahc_linux_info(struct Scsi_Host *host) 436 { 437 static char buffer[512]; 438 char ahc_info[256]; 439 char *bp; 440 struct ahc_softc *ahc; 441 442 bp = &buffer[0]; 443 ahc = *(struct ahc_softc **)host->hostdata; 444 memset(bp, 0, sizeof(buffer)); 445 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev "); 446 strcat(bp, AIC7XXX_DRIVER_VERSION); 447 strcat(bp, "\n"); 448 strcat(bp, " <"); 449 strcat(bp, ahc->description); 450 strcat(bp, ">\n"); 451 strcat(bp, " "); 452 ahc_controller_info(ahc, ahc_info); 453 strcat(bp, ahc_info); 454 strcat(bp, "\n"); 455 456 return (bp); 457 } 458 459 /* 460 * Queue an SCB to the controller. 461 */ 462 static int 463 ahc_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *)) 464 { 465 struct ahc_softc *ahc; 466 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device); 467 int rtn = SCSI_MLQUEUE_HOST_BUSY; 468 unsigned long flags; 469 470 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 471 472 ahc_lock(ahc, &flags); 473 if (ahc->platform_data->qfrozen == 0) { 474 cmd->scsi_done = scsi_done; 475 cmd->result = CAM_REQ_INPROG << 16; 476 rtn = ahc_linux_run_command(ahc, dev, cmd); 477 } 478 ahc_unlock(ahc, &flags); 479 480 return rtn; 481 } 482 483 static inline struct scsi_target ** 484 ahc_linux_target_in_softc(struct scsi_target *starget) 485 { 486 struct ahc_softc *ahc = 487 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); 488 unsigned int target_offset; 489 490 target_offset = starget->id; 491 if (starget->channel != 0) 492 target_offset += 8; 493 494 return &ahc->platform_data->starget[target_offset]; 495 } 496 497 static int 498 ahc_linux_target_alloc(struct scsi_target *starget) 499 { 500 struct ahc_softc *ahc = 501 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); 502 struct seeprom_config *sc = ahc->seep_config; 503 unsigned long flags; 504 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); 505 unsigned short scsirate; 506 struct ahc_devinfo devinfo; 507 struct ahc_initiator_tinfo *tinfo; 508 struct ahc_tmode_tstate *tstate; 509 char channel = starget->channel + 'A'; 510 unsigned int our_id = ahc->our_id; 511 unsigned int target_offset; 512 513 target_offset = starget->id; 514 if (starget->channel != 0) 515 target_offset += 8; 516 517 if (starget->channel) 518 our_id = ahc->our_id_b; 519 520 ahc_lock(ahc, &flags); 521 522 BUG_ON(*ahc_targp != NULL); 523 524 *ahc_targp = starget; 525 526 if (sc) { 527 int maxsync = AHC_SYNCRATE_DT; 528 int ultra = 0; 529 int flags = sc->device_flags[target_offset]; 530 531 if (ahc->flags & AHC_NEWEEPROM_FMT) { 532 if (flags & CFSYNCHISULTRA) 533 ultra = 1; 534 } else if (flags & CFULTRAEN) 535 ultra = 1; 536 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04 537 * change it to ultra=0, CFXFER = 0 */ 538 if(ultra && (flags & CFXFER) == 0x04) { 539 ultra = 0; 540 flags &= ~CFXFER; 541 } 542 543 if ((ahc->features & AHC_ULTRA2) != 0) { 544 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0); 545 } else { 546 scsirate = (flags & CFXFER) << 4; 547 maxsync = ultra ? AHC_SYNCRATE_ULTRA : 548 AHC_SYNCRATE_FAST; 549 } 550 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; 551 if (!(flags & CFSYNCH)) 552 spi_max_offset(starget) = 0; 553 spi_min_period(starget) = 554 ahc_find_period(ahc, scsirate, maxsync); 555 556 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id, 557 starget->id, &tstate); 558 } 559 ahc_compile_devinfo(&devinfo, our_id, starget->id, 560 CAM_LUN_WILDCARD, channel, 561 ROLE_INITIATOR); 562 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0, 563 AHC_TRANS_GOAL, /*paused*/FALSE); 564 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 565 AHC_TRANS_GOAL, /*paused*/FALSE); 566 ahc_unlock(ahc, &flags); 567 568 return 0; 569 } 570 571 static void 572 ahc_linux_target_destroy(struct scsi_target *starget) 573 { 574 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); 575 576 *ahc_targp = NULL; 577 } 578 579 static int 580 ahc_linux_slave_alloc(struct scsi_device *sdev) 581 { 582 struct ahc_softc *ahc = 583 *((struct ahc_softc **)sdev->host->hostdata); 584 struct scsi_target *starget = sdev->sdev_target; 585 struct ahc_linux_device *dev; 586 587 if (bootverbose) 588 printf("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id); 589 590 dev = scsi_transport_device_data(sdev); 591 memset(dev, 0, sizeof(*dev)); 592 593 /* 594 * We start out life using untagged 595 * transactions of which we allow one. 596 */ 597 dev->openings = 1; 598 599 /* 600 * Set maxtags to 0. This will be changed if we 601 * later determine that we are dealing with 602 * a tagged queuing capable device. 603 */ 604 dev->maxtags = 0; 605 606 spi_period(starget) = 0; 607 608 return 0; 609 } 610 611 static int 612 ahc_linux_slave_configure(struct scsi_device *sdev) 613 { 614 struct ahc_softc *ahc; 615 616 ahc = *((struct ahc_softc **)sdev->host->hostdata); 617 618 if (bootverbose) 619 sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); 620 621 ahc_linux_device_queue_depth(sdev); 622 623 /* Initial Domain Validation */ 624 if (!spi_initial_dv(sdev->sdev_target)) 625 spi_dv_device(sdev); 626 627 return 0; 628 } 629 630 #if defined(__i386__) 631 /* 632 * Return the disk geometry for the given SCSI device. 633 */ 634 static int 635 ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 636 sector_t capacity, int geom[]) 637 { 638 uint8_t *bh; 639 int heads; 640 int sectors; 641 int cylinders; 642 int ret; 643 int extended; 644 struct ahc_softc *ahc; 645 u_int channel; 646 647 ahc = *((struct ahc_softc **)sdev->host->hostdata); 648 channel = sdev_channel(sdev); 649 650 bh = scsi_bios_ptable(bdev); 651 if (bh) { 652 ret = scsi_partsize(bh, capacity, 653 &geom[2], &geom[0], &geom[1]); 654 kfree(bh); 655 if (ret != -1) 656 return (ret); 657 } 658 heads = 64; 659 sectors = 32; 660 cylinders = aic_sector_div(capacity, heads, sectors); 661 662 if (aic7xxx_extended != 0) 663 extended = 1; 664 else if (channel == 0) 665 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0; 666 else 667 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0; 668 if (extended && cylinders >= 1024) { 669 heads = 255; 670 sectors = 63; 671 cylinders = aic_sector_div(capacity, heads, sectors); 672 } 673 geom[0] = heads; 674 geom[1] = sectors; 675 geom[2] = cylinders; 676 return (0); 677 } 678 #endif 679 680 /* 681 * Abort the current SCSI command(s). 682 */ 683 static int 684 ahc_linux_abort(struct scsi_cmnd *cmd) 685 { 686 int error; 687 688 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT); 689 if (error != 0) 690 printf("aic7xxx_abort returns 0x%x\n", error); 691 return (error); 692 } 693 694 /* 695 * Attempt to send a target reset message to the device that timed out. 696 */ 697 static int 698 ahc_linux_dev_reset(struct scsi_cmnd *cmd) 699 { 700 int error; 701 702 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET); 703 if (error != 0) 704 printf("aic7xxx_dev_reset returns 0x%x\n", error); 705 return (error); 706 } 707 708 /* 709 * Reset the SCSI bus. 710 */ 711 static int 712 ahc_linux_bus_reset(struct scsi_cmnd *cmd) 713 { 714 struct ahc_softc *ahc; 715 int found; 716 unsigned long flags; 717 718 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 719 720 ahc_lock(ahc, &flags); 721 found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A', 722 /*initiate reset*/TRUE); 723 ahc_unlock(ahc, &flags); 724 725 if (bootverbose) 726 printf("%s: SCSI bus reset delivered. " 727 "%d SCBs aborted.\n", ahc_name(ahc), found); 728 729 return SUCCESS; 730 } 731 732 struct scsi_host_template aic7xxx_driver_template = { 733 .module = THIS_MODULE, 734 .name = "aic7xxx", 735 .proc_name = "aic7xxx", 736 .proc_info = ahc_linux_proc_info, 737 .info = ahc_linux_info, 738 .queuecommand = ahc_linux_queue, 739 .eh_abort_handler = ahc_linux_abort, 740 .eh_device_reset_handler = ahc_linux_dev_reset, 741 .eh_bus_reset_handler = ahc_linux_bus_reset, 742 #if defined(__i386__) 743 .bios_param = ahc_linux_biosparam, 744 #endif 745 .can_queue = AHC_MAX_QUEUE, 746 .this_id = -1, 747 .max_sectors = 8192, 748 .cmd_per_lun = 2, 749 .use_clustering = ENABLE_CLUSTERING, 750 .slave_alloc = ahc_linux_slave_alloc, 751 .slave_configure = ahc_linux_slave_configure, 752 .target_alloc = ahc_linux_target_alloc, 753 .target_destroy = ahc_linux_target_destroy, 754 }; 755 756 /**************************** Tasklet Handler *********************************/ 757 758 /******************************** Macros **************************************/ 759 #define BUILD_SCSIID(ahc, cmd) \ 760 ((((cmd)->device->id << TID_SHIFT) & TID) \ 761 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \ 762 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB)) 763 764 /******************************** Bus DMA *************************************/ 765 int 766 ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent, 767 bus_size_t alignment, bus_size_t boundary, 768 dma_addr_t lowaddr, dma_addr_t highaddr, 769 bus_dma_filter_t *filter, void *filterarg, 770 bus_size_t maxsize, int nsegments, 771 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 772 { 773 bus_dma_tag_t dmat; 774 775 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT); 776 if (dmat == NULL) 777 return (ENOMEM); 778 779 /* 780 * Linux is very simplistic about DMA memory. For now don't 781 * maintain all specification information. Once Linux supplies 782 * better facilities for doing these operations, or the 783 * needs of this particular driver change, we might need to do 784 * more here. 785 */ 786 dmat->alignment = alignment; 787 dmat->boundary = boundary; 788 dmat->maxsize = maxsize; 789 *ret_tag = dmat; 790 return (0); 791 } 792 793 void 794 ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat) 795 { 796 free(dmat, M_DEVBUF); 797 } 798 799 int 800 ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr, 801 int flags, bus_dmamap_t *mapp) 802 { 803 *vaddr = pci_alloc_consistent(ahc->dev_softc, 804 dmat->maxsize, mapp); 805 if (*vaddr == NULL) 806 return ENOMEM; 807 return 0; 808 } 809 810 void 811 ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat, 812 void* vaddr, bus_dmamap_t map) 813 { 814 pci_free_consistent(ahc->dev_softc, dmat->maxsize, 815 vaddr, map); 816 } 817 818 int 819 ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map, 820 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 821 void *cb_arg, int flags) 822 { 823 /* 824 * Assume for now that this will only be used during 825 * initialization and not for per-transaction buffer mapping. 826 */ 827 bus_dma_segment_t stack_sg; 828 829 stack_sg.ds_addr = map; 830 stack_sg.ds_len = dmat->maxsize; 831 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 832 return (0); 833 } 834 835 void 836 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 837 { 838 } 839 840 int 841 ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 842 { 843 /* Nothing to do */ 844 return (0); 845 } 846 847 static void 848 ahc_linux_setup_tag_info_global(char *p) 849 { 850 int tags, i, j; 851 852 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 853 printf("Setting Global Tags= %d\n", tags); 854 855 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) { 856 for (j = 0; j < AHC_NUM_TARGETS; j++) { 857 aic7xxx_tag_info[i].tag_commands[j] = tags; 858 } 859 } 860 } 861 862 static void 863 ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 864 { 865 866 if ((instance >= 0) && (targ >= 0) 867 && (instance < ARRAY_SIZE(aic7xxx_tag_info)) 868 && (targ < AHC_NUM_TARGETS)) { 869 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff; 870 if (bootverbose) 871 printf("tag_info[%d:%d] = %d\n", instance, targ, value); 872 } 873 } 874 875 static char * 876 ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 877 void (*callback)(u_long, int, int, int32_t), 878 u_long callback_arg) 879 { 880 char *tok_end; 881 char *tok_end2; 882 int i; 883 int instance; 884 int targ; 885 int done; 886 char tok_list[] = {'.', ',', '{', '}', '\0'}; 887 888 /* All options use a ':' name/arg separator */ 889 if (*opt_arg != ':') 890 return (opt_arg); 891 opt_arg++; 892 instance = -1; 893 targ = -1; 894 done = FALSE; 895 /* 896 * Restore separator that may be in 897 * the middle of our option argument. 898 */ 899 tok_end = strchr(opt_arg, '\0'); 900 if (tok_end < end) 901 *tok_end = ','; 902 while (!done) { 903 switch (*opt_arg) { 904 case '{': 905 if (instance == -1) { 906 instance = 0; 907 } else { 908 if (depth > 1) { 909 if (targ == -1) 910 targ = 0; 911 } else { 912 printf("Malformed Option %s\n", 913 opt_name); 914 done = TRUE; 915 } 916 } 917 opt_arg++; 918 break; 919 case '}': 920 if (targ != -1) 921 targ = -1; 922 else if (instance != -1) 923 instance = -1; 924 opt_arg++; 925 break; 926 case ',': 927 case '.': 928 if (instance == -1) 929 done = TRUE; 930 else if (targ >= 0) 931 targ++; 932 else if (instance >= 0) 933 instance++; 934 opt_arg++; 935 break; 936 case '\0': 937 done = TRUE; 938 break; 939 default: 940 tok_end = end; 941 for (i = 0; tok_list[i]; i++) { 942 tok_end2 = strchr(opt_arg, tok_list[i]); 943 if ((tok_end2) && (tok_end2 < tok_end)) 944 tok_end = tok_end2; 945 } 946 callback(callback_arg, instance, targ, 947 simple_strtol(opt_arg, NULL, 0)); 948 opt_arg = tok_end; 949 break; 950 } 951 } 952 return (opt_arg); 953 } 954 955 /* 956 * Handle Linux boot parameters. This routine allows for assigning a value 957 * to a parameter with a ':' between the parameter and the value. 958 * ie. aic7xxx=stpwlev:1,extended 959 */ 960 static int 961 aic7xxx_setup(char *s) 962 { 963 int i, n; 964 char *p; 965 char *end; 966 967 static struct { 968 const char *name; 969 uint32_t *flag; 970 } options[] = { 971 { "extended", &aic7xxx_extended }, 972 { "no_reset", &aic7xxx_no_reset }, 973 { "verbose", &aic7xxx_verbose }, 974 { "allow_memio", &aic7xxx_allow_memio}, 975 #ifdef AHC_DEBUG 976 { "debug", &ahc_debug }, 977 #endif 978 { "periodic_otag", &aic7xxx_periodic_otag }, 979 { "pci_parity", &aic7xxx_pci_parity }, 980 { "seltime", &aic7xxx_seltime }, 981 { "tag_info", NULL }, 982 { "global_tag_depth", NULL }, 983 { "dv", NULL } 984 }; 985 986 end = strchr(s, '\0'); 987 988 /* 989 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE 990 * will never be 0 in this case. 991 */ 992 n = 0; 993 994 while ((p = strsep(&s, ",.")) != NULL) { 995 if (*p == '\0') 996 continue; 997 for (i = 0; i < ARRAY_SIZE(options); i++) { 998 999 n = strlen(options[i].name); 1000 if (strncmp(options[i].name, p, n) == 0) 1001 break; 1002 } 1003 if (i == ARRAY_SIZE(options)) 1004 continue; 1005 1006 if (strncmp(p, "global_tag_depth", n) == 0) { 1007 ahc_linux_setup_tag_info_global(p + n); 1008 } else if (strncmp(p, "tag_info", n) == 0) { 1009 s = ahc_parse_brace_option("tag_info", p + n, end, 1010 2, ahc_linux_setup_tag_info, 0); 1011 } else if (p[n] == ':') { 1012 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1013 } else if (strncmp(p, "verbose", n) == 0) { 1014 *(options[i].flag) = 1; 1015 } else { 1016 *(options[i].flag) ^= 0xFFFFFFFF; 1017 } 1018 } 1019 return 1; 1020 } 1021 1022 __setup("aic7xxx=", aic7xxx_setup); 1023 1024 uint32_t aic7xxx_verbose; 1025 1026 int 1027 ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template) 1028 { 1029 char buf[80]; 1030 struct Scsi_Host *host; 1031 char *new_name; 1032 u_long s; 1033 int retval; 1034 1035 template->name = ahc->description; 1036 host = scsi_host_alloc(template, sizeof(struct ahc_softc *)); 1037 if (host == NULL) 1038 return (ENOMEM); 1039 1040 *((struct ahc_softc **)host->hostdata) = ahc; 1041 ahc->platform_data->host = host; 1042 host->can_queue = AHC_MAX_QUEUE; 1043 host->cmd_per_lun = 2; 1044 /* XXX No way to communicate the ID for multiple channels */ 1045 host->this_id = ahc->our_id; 1046 host->irq = ahc->platform_data->irq; 1047 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8; 1048 host->max_lun = AHC_NUM_LUNS; 1049 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0; 1050 host->sg_tablesize = AHC_NSEG; 1051 ahc_lock(ahc, &s); 1052 ahc_set_unit(ahc, ahc_linux_unit++); 1053 ahc_unlock(ahc, &s); 1054 sprintf(buf, "scsi%d", host->host_no); 1055 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); 1056 if (new_name != NULL) { 1057 strcpy(new_name, buf); 1058 ahc_set_name(ahc, new_name); 1059 } 1060 host->unique_id = ahc->unit; 1061 ahc_linux_initialize_scsi_bus(ahc); 1062 ahc_intr_enable(ahc, TRUE); 1063 1064 host->transportt = ahc_linux_transport_template; 1065 1066 retval = scsi_add_host(host, 1067 (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); 1068 if (retval) { 1069 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n"); 1070 scsi_host_put(host); 1071 return retval; 1072 } 1073 1074 scsi_scan_host(host); 1075 return 0; 1076 } 1077 1078 /* 1079 * Place the SCSI bus into a known state by either resetting it, 1080 * or forcing transfer negotiations on the next command to any 1081 * target. 1082 */ 1083 void 1084 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc) 1085 { 1086 int i; 1087 int numtarg; 1088 unsigned long s; 1089 1090 i = 0; 1091 numtarg = 0; 1092 1093 ahc_lock(ahc, &s); 1094 1095 if (aic7xxx_no_reset != 0) 1096 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B); 1097 1098 if ((ahc->flags & AHC_RESET_BUS_A) != 0) 1099 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE); 1100 else 1101 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8; 1102 1103 if ((ahc->features & AHC_TWIN) != 0) { 1104 1105 if ((ahc->flags & AHC_RESET_BUS_B) != 0) { 1106 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE); 1107 } else { 1108 if (numtarg == 0) 1109 i = 8; 1110 numtarg += 8; 1111 } 1112 } 1113 1114 /* 1115 * Force negotiation to async for all targets that 1116 * will not see an initial bus reset. 1117 */ 1118 for (; i < numtarg; i++) { 1119 struct ahc_devinfo devinfo; 1120 struct ahc_initiator_tinfo *tinfo; 1121 struct ahc_tmode_tstate *tstate; 1122 u_int our_id; 1123 u_int target_id; 1124 char channel; 1125 1126 channel = 'A'; 1127 our_id = ahc->our_id; 1128 target_id = i; 1129 if (i > 7 && (ahc->features & AHC_TWIN) != 0) { 1130 channel = 'B'; 1131 our_id = ahc->our_id_b; 1132 target_id = i % 8; 1133 } 1134 tinfo = ahc_fetch_transinfo(ahc, channel, our_id, 1135 target_id, &tstate); 1136 ahc_compile_devinfo(&devinfo, our_id, target_id, 1137 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR); 1138 ahc_update_neg_request(ahc, &devinfo, tstate, 1139 tinfo, AHC_NEG_ALWAYS); 1140 } 1141 ahc_unlock(ahc, &s); 1142 /* Give the bus some time to recover */ 1143 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) { 1144 ahc_linux_freeze_simq(ahc); 1145 msleep(AIC7XXX_RESET_DELAY); 1146 ahc_linux_release_simq(ahc); 1147 } 1148 } 1149 1150 int 1151 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg) 1152 { 1153 1154 ahc->platform_data = 1155 malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT); 1156 if (ahc->platform_data == NULL) 1157 return (ENOMEM); 1158 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data)); 1159 ahc->platform_data->irq = AHC_LINUX_NOIRQ; 1160 ahc_lockinit(ahc); 1161 ahc->seltime = (aic7xxx_seltime & 0x3) << 4; 1162 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4; 1163 if (aic7xxx_pci_parity == 0) 1164 ahc->flags |= AHC_DISABLE_PCI_PERR; 1165 1166 return (0); 1167 } 1168 1169 void 1170 ahc_platform_free(struct ahc_softc *ahc) 1171 { 1172 struct scsi_target *starget; 1173 int i; 1174 1175 if (ahc->platform_data != NULL) { 1176 /* destroy all of the device and target objects */ 1177 for (i = 0; i < AHC_NUM_TARGETS; i++) { 1178 starget = ahc->platform_data->starget[i]; 1179 if (starget != NULL) { 1180 ahc->platform_data->starget[i] = NULL; 1181 } 1182 } 1183 1184 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ) 1185 free_irq(ahc->platform_data->irq, ahc); 1186 if (ahc->tag == BUS_SPACE_PIO 1187 && ahc->bsh.ioport != 0) 1188 release_region(ahc->bsh.ioport, 256); 1189 if (ahc->tag == BUS_SPACE_MEMIO 1190 && ahc->bsh.maddr != NULL) { 1191 iounmap(ahc->bsh.maddr); 1192 release_mem_region(ahc->platform_data->mem_busaddr, 1193 0x1000); 1194 } 1195 1196 if (ahc->platform_data->host) 1197 scsi_host_put(ahc->platform_data->host); 1198 1199 free(ahc->platform_data, M_DEVBUF); 1200 } 1201 } 1202 1203 void 1204 ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb) 1205 { 1206 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb), 1207 SCB_GET_CHANNEL(ahc, scb), 1208 SCB_GET_LUN(scb), SCB_LIST_NULL, 1209 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1210 } 1211 1212 void 1213 ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev, 1214 struct ahc_devinfo *devinfo, ahc_queue_alg alg) 1215 { 1216 struct ahc_linux_device *dev; 1217 int was_queuing; 1218 int now_queuing; 1219 1220 if (sdev == NULL) 1221 return; 1222 dev = scsi_transport_device_data(sdev); 1223 1224 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED); 1225 switch (alg) { 1226 default: 1227 case AHC_QUEUE_NONE: 1228 now_queuing = 0; 1229 break; 1230 case AHC_QUEUE_BASIC: 1231 now_queuing = AHC_DEV_Q_BASIC; 1232 break; 1233 case AHC_QUEUE_TAGGED: 1234 now_queuing = AHC_DEV_Q_TAGGED; 1235 break; 1236 } 1237 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0 1238 && (was_queuing != now_queuing) 1239 && (dev->active != 0)) { 1240 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY; 1241 dev->qfrozen++; 1242 } 1243 1244 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG); 1245 if (now_queuing) { 1246 u_int usertags; 1247 1248 usertags = ahc_linux_user_tagdepth(ahc, devinfo); 1249 if (!was_queuing) { 1250 /* 1251 * Start out agressively and allow our 1252 * dynamic queue depth algorithm to take 1253 * care of the rest. 1254 */ 1255 dev->maxtags = usertags; 1256 dev->openings = dev->maxtags - dev->active; 1257 } 1258 if (dev->maxtags == 0) { 1259 /* 1260 * Queueing is disabled by the user. 1261 */ 1262 dev->openings = 1; 1263 } else if (alg == AHC_QUEUE_TAGGED) { 1264 dev->flags |= AHC_DEV_Q_TAGGED; 1265 if (aic7xxx_periodic_otag != 0) 1266 dev->flags |= AHC_DEV_PERIODIC_OTAG; 1267 } else 1268 dev->flags |= AHC_DEV_Q_BASIC; 1269 } else { 1270 /* We can only have one opening. */ 1271 dev->maxtags = 0; 1272 dev->openings = 1 - dev->active; 1273 } 1274 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) { 1275 case AHC_DEV_Q_BASIC: 1276 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); 1277 scsi_activate_tcq(sdev, dev->openings + dev->active); 1278 break; 1279 case AHC_DEV_Q_TAGGED: 1280 scsi_set_tag_type(sdev, MSG_ORDERED_TAG); 1281 scsi_activate_tcq(sdev, dev->openings + dev->active); 1282 break; 1283 default: 1284 /* 1285 * We allow the OS to queue 2 untagged transactions to 1286 * us at any time even though we can only execute them 1287 * serially on the controller/device. This should 1288 * remove some latency. 1289 */ 1290 scsi_deactivate_tcq(sdev, 2); 1291 break; 1292 } 1293 } 1294 1295 int 1296 ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel, 1297 int lun, u_int tag, role_t role, uint32_t status) 1298 { 1299 return 0; 1300 } 1301 1302 static u_int 1303 ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 1304 { 1305 static int warned_user; 1306 u_int tags; 1307 1308 tags = 0; 1309 if ((ahc->user_discenable & devinfo->target_mask) != 0) { 1310 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) { 1311 if (warned_user == 0) { 1312 1313 printf(KERN_WARNING 1314 "aic7xxx: WARNING: Insufficient tag_info instances\n" 1315 "aic7xxx: for installed controllers. Using defaults\n" 1316 "aic7xxx: Please update the aic7xxx_tag_info array in\n" 1317 "aic7xxx: the aic7xxx_osm..c source file.\n"); 1318 warned_user++; 1319 } 1320 tags = AHC_MAX_QUEUE; 1321 } else { 1322 adapter_tag_info_t *tag_info; 1323 1324 tag_info = &aic7xxx_tag_info[ahc->unit]; 1325 tags = tag_info->tag_commands[devinfo->target_offset]; 1326 if (tags > AHC_MAX_QUEUE) 1327 tags = AHC_MAX_QUEUE; 1328 } 1329 } 1330 return (tags); 1331 } 1332 1333 /* 1334 * Determines the queue depth for a given device. 1335 */ 1336 static void 1337 ahc_linux_device_queue_depth(struct scsi_device *sdev) 1338 { 1339 struct ahc_devinfo devinfo; 1340 u_int tags; 1341 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata); 1342 1343 ahc_compile_devinfo(&devinfo, 1344 sdev->sdev_target->channel == 0 1345 ? ahc->our_id : ahc->our_id_b, 1346 sdev->sdev_target->id, sdev->lun, 1347 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1348 ROLE_INITIATOR); 1349 tags = ahc_linux_user_tagdepth(ahc, &devinfo); 1350 if (tags != 0 && sdev->tagged_supported != 0) { 1351 1352 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED); 1353 ahc_send_async(ahc, devinfo.channel, devinfo.target, 1354 devinfo.lun, AC_TRANSFER_NEG); 1355 ahc_print_devinfo(ahc, &devinfo); 1356 printf("Tagged Queuing enabled. Depth %d\n", tags); 1357 } else { 1358 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE); 1359 ahc_send_async(ahc, devinfo.channel, devinfo.target, 1360 devinfo.lun, AC_TRANSFER_NEG); 1361 } 1362 } 1363 1364 static int 1365 ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev, 1366 struct scsi_cmnd *cmd) 1367 { 1368 struct scb *scb; 1369 struct hardware_scb *hscb; 1370 struct ahc_initiator_tinfo *tinfo; 1371 struct ahc_tmode_tstate *tstate; 1372 uint16_t mask; 1373 struct scb_tailq *untagged_q = NULL; 1374 int nseg; 1375 1376 /* 1377 * Schedule us to run later. The only reason we are not 1378 * running is because the whole controller Q is frozen. 1379 */ 1380 if (ahc->platform_data->qfrozen != 0) 1381 return SCSI_MLQUEUE_HOST_BUSY; 1382 1383 /* 1384 * We only allow one untagged transaction 1385 * per target in the initiator role unless 1386 * we are storing a full busy target *lun* 1387 * table in SCB space. 1388 */ 1389 if (!blk_rq_tagged(cmd->request) 1390 && (ahc->features & AHC_SCB_BTT) == 0) { 1391 int target_offset; 1392 1393 target_offset = cmd->device->id + cmd->device->channel * 8; 1394 untagged_q = &(ahc->untagged_queues[target_offset]); 1395 if (!TAILQ_EMPTY(untagged_q)) 1396 /* if we're already executing an untagged command 1397 * we're busy to another */ 1398 return SCSI_MLQUEUE_DEVICE_BUSY; 1399 } 1400 1401 /* 1402 * Get an scb to use. 1403 */ 1404 scb = ahc_get_scb(ahc); 1405 if (!scb) 1406 return SCSI_MLQUEUE_HOST_BUSY; 1407 1408 scb->io_ctx = cmd; 1409 scb->platform_data->dev = dev; 1410 hscb = scb->hscb; 1411 cmd->host_scribble = (char *)scb; 1412 1413 /* 1414 * Fill out basics of the HSCB. 1415 */ 1416 hscb->control = 0; 1417 hscb->scsiid = BUILD_SCSIID(ahc, cmd); 1418 hscb->lun = cmd->device->lun; 1419 mask = SCB_GET_TARGET_MASK(ahc, scb); 1420 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb), 1421 SCB_GET_OUR_ID(scb), 1422 SCB_GET_TARGET(ahc, scb), &tstate); 1423 hscb->scsirate = tinfo->scsirate; 1424 hscb->scsioffset = tinfo->curr.offset; 1425 if ((tstate->ultraenb & mask) != 0) 1426 hscb->control |= ULTRAENB; 1427 1428 if ((ahc->user_discenable & mask) != 0) 1429 hscb->control |= DISCENB; 1430 1431 if ((tstate->auto_negotiate & mask) != 0) { 1432 scb->flags |= SCB_AUTO_NEGOTIATE; 1433 scb->hscb->control |= MK_MESSAGE; 1434 } 1435 1436 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) { 1437 int msg_bytes; 1438 uint8_t tag_msgs[2]; 1439 1440 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); 1441 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { 1442 hscb->control |= tag_msgs[0]; 1443 if (tag_msgs[0] == MSG_ORDERED_TASK) 1444 dev->commands_since_idle_or_otag = 0; 1445 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH 1446 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) { 1447 hscb->control |= MSG_ORDERED_TASK; 1448 dev->commands_since_idle_or_otag = 0; 1449 } else { 1450 hscb->control |= MSG_SIMPLE_TASK; 1451 } 1452 } 1453 1454 hscb->cdb_len = cmd->cmd_len; 1455 if (hscb->cdb_len <= 12) { 1456 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len); 1457 } else { 1458 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len); 1459 scb->flags |= SCB_CDB32_PTR; 1460 } 1461 1462 scb->platform_data->xfer_len = 0; 1463 ahc_set_residual(scb, 0); 1464 ahc_set_sense_residual(scb, 0); 1465 scb->sg_count = 0; 1466 1467 nseg = scsi_dma_map(cmd); 1468 BUG_ON(nseg < 0); 1469 if (nseg > 0) { 1470 struct ahc_dma_seg *sg; 1471 struct scatterlist *cur_seg; 1472 int i; 1473 1474 /* Copy the segments into the SG list. */ 1475 sg = scb->sg_list; 1476 /* 1477 * The sg_count may be larger than nseg if 1478 * a transfer crosses a 32bit page. 1479 */ 1480 scsi_for_each_sg(cmd, cur_seg, nseg, i) { 1481 dma_addr_t addr; 1482 bus_size_t len; 1483 int consumed; 1484 1485 addr = sg_dma_address(cur_seg); 1486 len = sg_dma_len(cur_seg); 1487 consumed = ahc_linux_map_seg(ahc, scb, 1488 sg, addr, len); 1489 sg += consumed; 1490 scb->sg_count += consumed; 1491 } 1492 sg--; 1493 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); 1494 1495 /* 1496 * Reset the sg list pointer. 1497 */ 1498 scb->hscb->sgptr = 1499 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); 1500 1501 /* 1502 * Copy the first SG into the "current" 1503 * data pointer area. 1504 */ 1505 scb->hscb->dataptr = scb->sg_list->addr; 1506 scb->hscb->datacnt = scb->sg_list->len; 1507 } else { 1508 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL); 1509 scb->hscb->dataptr = 0; 1510 scb->hscb->datacnt = 0; 1511 scb->sg_count = 0; 1512 } 1513 1514 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links); 1515 dev->openings--; 1516 dev->active++; 1517 dev->commands_issued++; 1518 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0) 1519 dev->commands_since_idle_or_otag++; 1520 1521 scb->flags |= SCB_ACTIVE; 1522 if (untagged_q) { 1523 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe); 1524 scb->flags |= SCB_UNTAGGEDQ; 1525 } 1526 ahc_queue_scb(ahc, scb); 1527 return 0; 1528 } 1529 1530 /* 1531 * SCSI controller interrupt handler. 1532 */ 1533 irqreturn_t 1534 ahc_linux_isr(int irq, void *dev_id) 1535 { 1536 struct ahc_softc *ahc; 1537 u_long flags; 1538 int ours; 1539 1540 ahc = (struct ahc_softc *) dev_id; 1541 ahc_lock(ahc, &flags); 1542 ours = ahc_intr(ahc); 1543 ahc_unlock(ahc, &flags); 1544 return IRQ_RETVAL(ours); 1545 } 1546 1547 void 1548 ahc_platform_flushwork(struct ahc_softc *ahc) 1549 { 1550 1551 } 1552 1553 void 1554 ahc_send_async(struct ahc_softc *ahc, char channel, 1555 u_int target, u_int lun, ac_code code) 1556 { 1557 switch (code) { 1558 case AC_TRANSFER_NEG: 1559 { 1560 char buf[80]; 1561 struct scsi_target *starget; 1562 struct ahc_linux_target *targ; 1563 struct info_str info; 1564 struct ahc_initiator_tinfo *tinfo; 1565 struct ahc_tmode_tstate *tstate; 1566 int target_offset; 1567 unsigned int target_ppr_options; 1568 1569 BUG_ON(target == CAM_TARGET_WILDCARD); 1570 1571 info.buffer = buf; 1572 info.length = sizeof(buf); 1573 info.offset = 0; 1574 info.pos = 0; 1575 tinfo = ahc_fetch_transinfo(ahc, channel, 1576 channel == 'A' ? ahc->our_id 1577 : ahc->our_id_b, 1578 target, &tstate); 1579 1580 /* 1581 * Don't bother reporting results while 1582 * negotiations are still pending. 1583 */ 1584 if (tinfo->curr.period != tinfo->goal.period 1585 || tinfo->curr.width != tinfo->goal.width 1586 || tinfo->curr.offset != tinfo->goal.offset 1587 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1588 if (bootverbose == 0) 1589 break; 1590 1591 /* 1592 * Don't bother reporting results that 1593 * are identical to those last reported. 1594 */ 1595 target_offset = target; 1596 if (channel == 'B') 1597 target_offset += 8; 1598 starget = ahc->platform_data->starget[target_offset]; 1599 if (starget == NULL) 1600 break; 1601 targ = scsi_transport_target_data(starget); 1602 1603 target_ppr_options = 1604 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1605 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1606 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0); 1607 1608 if (tinfo->curr.period == spi_period(starget) 1609 && tinfo->curr.width == spi_width(starget) 1610 && tinfo->curr.offset == spi_offset(starget) 1611 && tinfo->curr.ppr_options == target_ppr_options) 1612 if (bootverbose == 0) 1613 break; 1614 1615 spi_period(starget) = tinfo->curr.period; 1616 spi_width(starget) = tinfo->curr.width; 1617 spi_offset(starget) = tinfo->curr.offset; 1618 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1619 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1620 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1621 spi_display_xfer_agreement(starget); 1622 break; 1623 } 1624 case AC_SENT_BDR: 1625 { 1626 WARN_ON(lun != CAM_LUN_WILDCARD); 1627 scsi_report_device_reset(ahc->platform_data->host, 1628 channel - 'A', target); 1629 break; 1630 } 1631 case AC_BUS_RESET: 1632 if (ahc->platform_data->host != NULL) { 1633 scsi_report_bus_reset(ahc->platform_data->host, 1634 channel - 'A'); 1635 } 1636 break; 1637 default: 1638 panic("ahc_send_async: Unexpected async event"); 1639 } 1640 } 1641 1642 /* 1643 * Calls the higher level scsi done function and frees the scb. 1644 */ 1645 void 1646 ahc_done(struct ahc_softc *ahc, struct scb *scb) 1647 { 1648 struct scsi_cmnd *cmd; 1649 struct ahc_linux_device *dev; 1650 1651 LIST_REMOVE(scb, pending_links); 1652 if ((scb->flags & SCB_UNTAGGEDQ) != 0) { 1653 struct scb_tailq *untagged_q; 1654 int target_offset; 1655 1656 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); 1657 untagged_q = &(ahc->untagged_queues[target_offset]); 1658 TAILQ_REMOVE(untagged_q, scb, links.tqe); 1659 BUG_ON(!TAILQ_EMPTY(untagged_q)); 1660 } else if ((scb->flags & SCB_ACTIVE) == 0) { 1661 /* 1662 * Transactions aborted from the untagged queue may 1663 * not have been dispatched to the controller, so 1664 * only check the SCB_ACTIVE flag for tagged transactions. 1665 */ 1666 printf("SCB %d done'd twice\n", scb->hscb->tag); 1667 ahc_dump_card_state(ahc); 1668 panic("Stopping for safety"); 1669 } 1670 cmd = scb->io_ctx; 1671 dev = scb->platform_data->dev; 1672 dev->active--; 1673 dev->openings++; 1674 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1675 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1676 dev->qfrozen--; 1677 } 1678 ahc_linux_unmap_scb(ahc, scb); 1679 1680 /* 1681 * Guard against stale sense data. 1682 * The Linux mid-layer assumes that sense 1683 * was retrieved anytime the first byte of 1684 * the sense buffer looks "sane". 1685 */ 1686 cmd->sense_buffer[0] = 0; 1687 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) { 1688 uint32_t amount_xferred; 1689 1690 amount_xferred = 1691 ahc_get_transfer_length(scb) - ahc_get_residual(scb); 1692 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1693 #ifdef AHC_DEBUG 1694 if ((ahc_debug & AHC_SHOW_MISC) != 0) { 1695 ahc_print_path(ahc, scb); 1696 printf("Set CAM_UNCOR_PARITY\n"); 1697 } 1698 #endif 1699 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY); 1700 #ifdef AHC_REPORT_UNDERFLOWS 1701 /* 1702 * This code is disabled by default as some 1703 * clients of the SCSI system do not properly 1704 * initialize the underflow parameter. This 1705 * results in spurious termination of commands 1706 * that complete as expected (e.g. underflow is 1707 * allowed as command can return variable amounts 1708 * of data. 1709 */ 1710 } else if (amount_xferred < scb->io_ctx->underflow) { 1711 u_int i; 1712 1713 ahc_print_path(ahc, scb); 1714 printf("CDB:"); 1715 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1716 printf(" 0x%x", scb->io_ctx->cmnd[i]); 1717 printf("\n"); 1718 ahc_print_path(ahc, scb); 1719 printf("Saw underflow (%ld of %ld bytes). " 1720 "Treated as error\n", 1721 ahc_get_residual(scb), 1722 ahc_get_transfer_length(scb)); 1723 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1724 #endif 1725 } else { 1726 ahc_set_transaction_status(scb, CAM_REQ_CMP); 1727 } 1728 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1729 ahc_linux_handle_scsi_status(ahc, cmd->device, scb); 1730 } 1731 1732 if (dev->openings == 1 1733 && ahc_get_transaction_status(scb) == CAM_REQ_CMP 1734 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1735 dev->tag_success_count++; 1736 /* 1737 * Some devices deal with temporary internal resource 1738 * shortages by returning queue full. When the queue 1739 * full occurrs, we throttle back. Slowly try to get 1740 * back to our previous queue depth. 1741 */ 1742 if ((dev->openings + dev->active) < dev->maxtags 1743 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) { 1744 dev->tag_success_count = 0; 1745 dev->openings++; 1746 } 1747 1748 if (dev->active == 0) 1749 dev->commands_since_idle_or_otag = 0; 1750 1751 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1752 printf("Recovery SCB completes\n"); 1753 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT 1754 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED) 1755 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1756 1757 if (ahc->platform_data->eh_done) 1758 complete(ahc->platform_data->eh_done); 1759 } 1760 1761 ahc_free_scb(ahc, scb); 1762 ahc_linux_queue_cmd_complete(ahc, cmd); 1763 } 1764 1765 static void 1766 ahc_linux_handle_scsi_status(struct ahc_softc *ahc, 1767 struct scsi_device *sdev, struct scb *scb) 1768 { 1769 struct ahc_devinfo devinfo; 1770 struct ahc_linux_device *dev = scsi_transport_device_data(sdev); 1771 1772 ahc_compile_devinfo(&devinfo, 1773 ahc->our_id, 1774 sdev->sdev_target->id, sdev->lun, 1775 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1776 ROLE_INITIATOR); 1777 1778 /* 1779 * We don't currently trust the mid-layer to 1780 * properly deal with queue full or busy. So, 1781 * when one occurs, we tell the mid-layer to 1782 * unconditionally requeue the command to us 1783 * so that we can retry it ourselves. We also 1784 * implement our own throttling mechanism so 1785 * we don't clobber the device with too many 1786 * commands. 1787 */ 1788 switch (ahc_get_scsi_status(scb)) { 1789 default: 1790 break; 1791 case SCSI_STATUS_CHECK_COND: 1792 case SCSI_STATUS_CMD_TERMINATED: 1793 { 1794 struct scsi_cmnd *cmd; 1795 1796 /* 1797 * Copy sense information to the OS's cmd 1798 * structure if it is available. 1799 */ 1800 cmd = scb->io_ctx; 1801 if (scb->flags & SCB_SENSE) { 1802 u_int sense_size; 1803 1804 sense_size = min(sizeof(struct scsi_sense_data) 1805 - ahc_get_sense_residual(scb), 1806 (u_long)SCSI_SENSE_BUFFERSIZE); 1807 memcpy(cmd->sense_buffer, 1808 ahc_get_sense_buf(ahc, scb), sense_size); 1809 if (sense_size < SCSI_SENSE_BUFFERSIZE) 1810 memset(&cmd->sense_buffer[sense_size], 0, 1811 SCSI_SENSE_BUFFERSIZE - sense_size); 1812 cmd->result |= (DRIVER_SENSE << 24); 1813 #ifdef AHC_DEBUG 1814 if (ahc_debug & AHC_SHOW_SENSE) { 1815 int i; 1816 1817 printf("Copied %d bytes of sense data:", 1818 sense_size); 1819 for (i = 0; i < sense_size; i++) { 1820 if ((i & 0xF) == 0) 1821 printf("\n"); 1822 printf("0x%x ", cmd->sense_buffer[i]); 1823 } 1824 printf("\n"); 1825 } 1826 #endif 1827 } 1828 break; 1829 } 1830 case SCSI_STATUS_QUEUE_FULL: 1831 { 1832 /* 1833 * By the time the core driver has returned this 1834 * command, all other commands that were queued 1835 * to us but not the device have been returned. 1836 * This ensures that dev->active is equal to 1837 * the number of commands actually queued to 1838 * the device. 1839 */ 1840 dev->tag_success_count = 0; 1841 if (dev->active != 0) { 1842 /* 1843 * Drop our opening count to the number 1844 * of commands currently outstanding. 1845 */ 1846 dev->openings = 0; 1847 /* 1848 ahc_print_path(ahc, scb); 1849 printf("Dropping tag count to %d\n", dev->active); 1850 */ 1851 if (dev->active == dev->tags_on_last_queuefull) { 1852 1853 dev->last_queuefull_same_count++; 1854 /* 1855 * If we repeatedly see a queue full 1856 * at the same queue depth, this 1857 * device has a fixed number of tag 1858 * slots. Lock in this tag depth 1859 * so we stop seeing queue fulls from 1860 * this device. 1861 */ 1862 if (dev->last_queuefull_same_count 1863 == AHC_LOCK_TAGS_COUNT) { 1864 dev->maxtags = dev->active; 1865 ahc_print_path(ahc, scb); 1866 printf("Locking max tag count at %d\n", 1867 dev->active); 1868 } 1869 } else { 1870 dev->tags_on_last_queuefull = dev->active; 1871 dev->last_queuefull_same_count = 0; 1872 } 1873 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ); 1874 ahc_set_scsi_status(scb, SCSI_STATUS_OK); 1875 ahc_platform_set_tags(ahc, sdev, &devinfo, 1876 (dev->flags & AHC_DEV_Q_BASIC) 1877 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1878 break; 1879 } 1880 /* 1881 * Drop down to a single opening, and treat this 1882 * as if the target returned BUSY SCSI status. 1883 */ 1884 dev->openings = 1; 1885 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY); 1886 ahc_platform_set_tags(ahc, sdev, &devinfo, 1887 (dev->flags & AHC_DEV_Q_BASIC) 1888 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1889 break; 1890 } 1891 } 1892 } 1893 1894 static void 1895 ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd) 1896 { 1897 /* 1898 * Map CAM error codes into Linux Error codes. We 1899 * avoid the conversion so that the DV code has the 1900 * full error information available when making 1901 * state change decisions. 1902 */ 1903 { 1904 u_int new_status; 1905 1906 switch (ahc_cmd_get_transaction_status(cmd)) { 1907 case CAM_REQ_INPROG: 1908 case CAM_REQ_CMP: 1909 case CAM_SCSI_STATUS_ERROR: 1910 new_status = DID_OK; 1911 break; 1912 case CAM_REQ_ABORTED: 1913 new_status = DID_ABORT; 1914 break; 1915 case CAM_BUSY: 1916 new_status = DID_BUS_BUSY; 1917 break; 1918 case CAM_REQ_INVALID: 1919 case CAM_PATH_INVALID: 1920 new_status = DID_BAD_TARGET; 1921 break; 1922 case CAM_SEL_TIMEOUT: 1923 new_status = DID_NO_CONNECT; 1924 break; 1925 case CAM_SCSI_BUS_RESET: 1926 case CAM_BDR_SENT: 1927 new_status = DID_RESET; 1928 break; 1929 case CAM_UNCOR_PARITY: 1930 new_status = DID_PARITY; 1931 break; 1932 case CAM_CMD_TIMEOUT: 1933 new_status = DID_TIME_OUT; 1934 break; 1935 case CAM_UA_ABORT: 1936 case CAM_REQ_CMP_ERR: 1937 case CAM_AUTOSENSE_FAIL: 1938 case CAM_NO_HBA: 1939 case CAM_DATA_RUN_ERR: 1940 case CAM_UNEXP_BUSFREE: 1941 case CAM_SEQUENCE_FAIL: 1942 case CAM_CCB_LEN_ERR: 1943 case CAM_PROVIDE_FAIL: 1944 case CAM_REQ_TERMIO: 1945 case CAM_UNREC_HBA_ERROR: 1946 case CAM_REQ_TOO_BIG: 1947 new_status = DID_ERROR; 1948 break; 1949 case CAM_REQUEUE_REQ: 1950 new_status = DID_REQUEUE; 1951 break; 1952 default: 1953 /* We should never get here */ 1954 new_status = DID_ERROR; 1955 break; 1956 } 1957 1958 ahc_cmd_set_transaction_status(cmd, new_status); 1959 } 1960 1961 cmd->scsi_done(cmd); 1962 } 1963 1964 static void 1965 ahc_linux_freeze_simq(struct ahc_softc *ahc) 1966 { 1967 unsigned long s; 1968 1969 ahc_lock(ahc, &s); 1970 ahc->platform_data->qfrozen++; 1971 if (ahc->platform_data->qfrozen == 1) { 1972 scsi_block_requests(ahc->platform_data->host); 1973 1974 /* XXX What about Twin channels? */ 1975 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, 1976 CAM_LUN_WILDCARD, SCB_LIST_NULL, 1977 ROLE_INITIATOR, CAM_REQUEUE_REQ); 1978 } 1979 ahc_unlock(ahc, &s); 1980 } 1981 1982 static void 1983 ahc_linux_release_simq(struct ahc_softc *ahc) 1984 { 1985 u_long s; 1986 int unblock_reqs; 1987 1988 unblock_reqs = 0; 1989 ahc_lock(ahc, &s); 1990 if (ahc->platform_data->qfrozen > 0) 1991 ahc->platform_data->qfrozen--; 1992 if (ahc->platform_data->qfrozen == 0) 1993 unblock_reqs = 1; 1994 ahc_unlock(ahc, &s); 1995 /* 1996 * There is still a race here. The mid-layer 1997 * should keep its own freeze count and use 1998 * a bottom half handler to run the queues 1999 * so we can unblock with our own lock held. 2000 */ 2001 if (unblock_reqs) 2002 scsi_unblock_requests(ahc->platform_data->host); 2003 } 2004 2005 static int 2006 ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag) 2007 { 2008 struct ahc_softc *ahc; 2009 struct ahc_linux_device *dev; 2010 struct scb *pending_scb; 2011 u_int saved_scbptr; 2012 u_int active_scb_index; 2013 u_int last_phase; 2014 u_int saved_scsiid; 2015 u_int cdb_byte; 2016 int retval; 2017 int was_paused; 2018 int paused; 2019 int wait; 2020 int disconnected; 2021 unsigned long flags; 2022 2023 pending_scb = NULL; 2024 paused = FALSE; 2025 wait = FALSE; 2026 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 2027 2028 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n", 2029 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET"); 2030 2031 printf("CDB:"); 2032 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2033 printf(" 0x%x", cmd->cmnd[cdb_byte]); 2034 printf("\n"); 2035 2036 ahc_lock(ahc, &flags); 2037 2038 /* 2039 * First determine if we currently own this command. 2040 * Start by searching the device queue. If not found 2041 * there, check the pending_scb list. If not found 2042 * at all, and the system wanted us to just abort the 2043 * command, return success. 2044 */ 2045 dev = scsi_transport_device_data(cmd->device); 2046 2047 if (dev == NULL) { 2048 /* 2049 * No target device for this command exists, 2050 * so we must not still own the command. 2051 */ 2052 printf("%s:%d:%d:%d: Is not an active device\n", 2053 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2054 cmd->device->lun); 2055 retval = SUCCESS; 2056 goto no_cmd; 2057 } 2058 2059 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0 2060 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id, 2061 cmd->device->channel + 'A', 2062 cmd->device->lun, 2063 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) { 2064 printf("%s:%d:%d:%d: Command found on untagged queue\n", 2065 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2066 cmd->device->lun); 2067 retval = SUCCESS; 2068 goto done; 2069 } 2070 2071 /* 2072 * See if we can find a matching cmd in the pending list. 2073 */ 2074 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2075 if (pending_scb->io_ctx == cmd) 2076 break; 2077 } 2078 2079 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) { 2080 2081 /* Any SCB for this device will do for a target reset */ 2082 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2083 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd), 2084 scmd_channel(cmd) + 'A', 2085 CAM_LUN_WILDCARD, 2086 SCB_LIST_NULL, ROLE_INITIATOR)) 2087 break; 2088 } 2089 } 2090 2091 if (pending_scb == NULL) { 2092 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2093 goto no_cmd; 2094 } 2095 2096 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2097 /* 2098 * We can't queue two recovery actions using the same SCB 2099 */ 2100 retval = FAILED; 2101 goto done; 2102 } 2103 2104 /* 2105 * Ensure that the card doesn't do anything 2106 * behind our back and that we didn't "just" miss 2107 * an interrupt that would affect this cmd. 2108 */ 2109 was_paused = ahc_is_paused(ahc); 2110 ahc_pause_and_flushwork(ahc); 2111 paused = TRUE; 2112 2113 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2114 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2115 goto no_cmd; 2116 } 2117 2118 printf("%s: At time of recovery, card was %spaused\n", 2119 ahc_name(ahc), was_paused ? "" : "not "); 2120 ahc_dump_card_state(ahc); 2121 2122 disconnected = TRUE; 2123 if (flag == SCB_ABORT) { 2124 if (ahc_search_qinfifo(ahc, cmd->device->id, 2125 cmd->device->channel + 'A', 2126 cmd->device->lun, 2127 pending_scb->hscb->tag, 2128 ROLE_INITIATOR, CAM_REQ_ABORTED, 2129 SEARCH_COMPLETE) > 0) { 2130 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2131 ahc_name(ahc), cmd->device->channel, 2132 cmd->device->id, cmd->device->lun); 2133 retval = SUCCESS; 2134 goto done; 2135 } 2136 } else if (ahc_search_qinfifo(ahc, cmd->device->id, 2137 cmd->device->channel + 'A', 2138 cmd->device->lun, pending_scb->hscb->tag, 2139 ROLE_INITIATOR, /*status*/0, 2140 SEARCH_COUNT) > 0) { 2141 disconnected = FALSE; 2142 } 2143 2144 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2145 struct scb *bus_scb; 2146 2147 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG)); 2148 if (bus_scb == pending_scb) 2149 disconnected = FALSE; 2150 else if (flag != SCB_ABORT 2151 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid 2152 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb)) 2153 disconnected = FALSE; 2154 } 2155 2156 /* 2157 * At this point, pending_scb is the scb associated with the 2158 * passed in command. That command is currently active on the 2159 * bus, is in the disconnected state, or we're hoping to find 2160 * a command for the same target active on the bus to abuse to 2161 * send a BDR. Queue the appropriate message based on which of 2162 * these states we are in. 2163 */ 2164 last_phase = ahc_inb(ahc, LASTPHASE); 2165 saved_scbptr = ahc_inb(ahc, SCBPTR); 2166 active_scb_index = ahc_inb(ahc, SCB_TAG); 2167 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); 2168 if (last_phase != P_BUSFREE 2169 && (pending_scb->hscb->tag == active_scb_index 2170 || (flag == SCB_DEVICE_RESET 2171 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) { 2172 2173 /* 2174 * We're active on the bus, so assert ATN 2175 * and hope that the target responds. 2176 */ 2177 pending_scb = ahc_lookup_scb(ahc, active_scb_index); 2178 pending_scb->flags |= SCB_RECOVERY_SCB|flag; 2179 ahc_outb(ahc, MSG_OUT, HOST_MSG); 2180 ahc_outb(ahc, SCSISIGO, last_phase|ATNO); 2181 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2182 wait = TRUE; 2183 } else if (disconnected) { 2184 2185 /* 2186 * Actually re-queue this SCB in an attempt 2187 * to select the device before it reconnects. 2188 * In either case (selection or reselection), 2189 * we will now issue the approprate message 2190 * to the timed-out device. 2191 * 2192 * Set the MK_MESSAGE control bit indicating 2193 * that we desire to send a message. We 2194 * also set the disconnected flag since 2195 * in the paging case there is no guarantee 2196 * that our SCB control byte matches the 2197 * version on the card. We don't want the 2198 * sequencer to abort the command thinking 2199 * an unsolicited reselection occurred. 2200 */ 2201 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2202 pending_scb->flags |= SCB_RECOVERY_SCB|flag; 2203 2204 /* 2205 * Remove any cached copy of this SCB in the 2206 * disconnected list in preparation for the 2207 * queuing of our abort SCB. We use the 2208 * same element in the SCB, SCB_NEXT, for 2209 * both the qinfifo and the disconnected list. 2210 */ 2211 ahc_search_disc_list(ahc, cmd->device->id, 2212 cmd->device->channel + 'A', 2213 cmd->device->lun, pending_scb->hscb->tag, 2214 /*stop_on_first*/TRUE, 2215 /*remove*/TRUE, 2216 /*save_state*/FALSE); 2217 2218 /* 2219 * In the non-paging case, the sequencer will 2220 * never re-reference the in-core SCB. 2221 * To make sure we are notified during 2222 * reslection, set the MK_MESSAGE flag in 2223 * the card's copy of the SCB. 2224 */ 2225 if ((ahc->flags & AHC_PAGESCBS) == 0) { 2226 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag); 2227 ahc_outb(ahc, SCB_CONTROL, 2228 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE); 2229 } 2230 2231 /* 2232 * Clear out any entries in the QINFIFO first 2233 * so we are the next SCB for this target 2234 * to run. 2235 */ 2236 ahc_search_qinfifo(ahc, cmd->device->id, 2237 cmd->device->channel + 'A', 2238 cmd->device->lun, SCB_LIST_NULL, 2239 ROLE_INITIATOR, CAM_REQUEUE_REQ, 2240 SEARCH_COMPLETE); 2241 ahc_qinfifo_requeue_tail(ahc, pending_scb); 2242 ahc_outb(ahc, SCBPTR, saved_scbptr); 2243 ahc_print_path(ahc, pending_scb); 2244 printf("Device is disconnected, re-queuing SCB\n"); 2245 wait = TRUE; 2246 } else { 2247 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2248 retval = FAILED; 2249 goto done; 2250 } 2251 2252 no_cmd: 2253 /* 2254 * Our assumption is that if we don't have the command, no 2255 * recovery action was required, so we return success. Again, 2256 * the semantics of the mid-layer recovery engine are not 2257 * well defined, so this may change in time. 2258 */ 2259 retval = SUCCESS; 2260 done: 2261 if (paused) 2262 ahc_unpause(ahc); 2263 if (wait) { 2264 DECLARE_COMPLETION_ONSTACK(done); 2265 2266 ahc->platform_data->eh_done = &done; 2267 ahc_unlock(ahc, &flags); 2268 2269 printf("Recovery code sleeping\n"); 2270 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2271 ahc_lock(ahc, &flags); 2272 ahc->platform_data->eh_done = NULL; 2273 ahc_unlock(ahc, &flags); 2274 2275 printf("Timer Expired\n"); 2276 retval = FAILED; 2277 } 2278 printf("Recovery code awake\n"); 2279 } else 2280 ahc_unlock(ahc, &flags); 2281 return (retval); 2282 } 2283 2284 void 2285 ahc_platform_dump_card_state(struct ahc_softc *ahc) 2286 { 2287 } 2288 2289 static void ahc_linux_set_width(struct scsi_target *starget, int width) 2290 { 2291 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2292 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2293 struct ahc_devinfo devinfo; 2294 unsigned long flags; 2295 2296 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2297 starget->channel + 'A', ROLE_INITIATOR); 2298 ahc_lock(ahc, &flags); 2299 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE); 2300 ahc_unlock(ahc, &flags); 2301 } 2302 2303 static void ahc_linux_set_period(struct scsi_target *starget, int period) 2304 { 2305 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2306 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2307 struct ahc_tmode_tstate *tstate; 2308 struct ahc_initiator_tinfo *tinfo 2309 = ahc_fetch_transinfo(ahc, 2310 starget->channel + 'A', 2311 shost->this_id, starget->id, &tstate); 2312 struct ahc_devinfo devinfo; 2313 unsigned int ppr_options = tinfo->goal.ppr_options; 2314 unsigned long flags; 2315 unsigned long offset = tinfo->goal.offset; 2316 struct ahc_syncrate *syncrate; 2317 2318 if (offset == 0) 2319 offset = MAX_OFFSET; 2320 2321 if (period < 9) 2322 period = 9; /* 12.5ns is our minimum */ 2323 if (period == 9) { 2324 if (spi_max_width(starget)) 2325 ppr_options |= MSG_EXT_PPR_DT_REQ; 2326 else 2327 /* need wide for DT and need DT for 12.5 ns */ 2328 period = 10; 2329 } 2330 2331 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2332 starget->channel + 'A', ROLE_INITIATOR); 2333 2334 /* all PPR requests apart from QAS require wide transfers */ 2335 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2336 if (spi_width(starget) == 0) 2337 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2338 } 2339 2340 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2341 ahc_lock(ahc, &flags); 2342 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2343 ppr_options, AHC_TRANS_GOAL, FALSE); 2344 ahc_unlock(ahc, &flags); 2345 } 2346 2347 static void ahc_linux_set_offset(struct scsi_target *starget, int offset) 2348 { 2349 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2350 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2351 struct ahc_tmode_tstate *tstate; 2352 struct ahc_initiator_tinfo *tinfo 2353 = ahc_fetch_transinfo(ahc, 2354 starget->channel + 'A', 2355 shost->this_id, starget->id, &tstate); 2356 struct ahc_devinfo devinfo; 2357 unsigned int ppr_options = 0; 2358 unsigned int period = 0; 2359 unsigned long flags; 2360 struct ahc_syncrate *syncrate = NULL; 2361 2362 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2363 starget->channel + 'A', ROLE_INITIATOR); 2364 if (offset != 0) { 2365 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2366 period = tinfo->goal.period; 2367 ppr_options = tinfo->goal.ppr_options; 2368 } 2369 ahc_lock(ahc, &flags); 2370 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2371 ppr_options, AHC_TRANS_GOAL, FALSE); 2372 ahc_unlock(ahc, &flags); 2373 } 2374 2375 static void ahc_linux_set_dt(struct scsi_target *starget, int dt) 2376 { 2377 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2378 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2379 struct ahc_tmode_tstate *tstate; 2380 struct ahc_initiator_tinfo *tinfo 2381 = ahc_fetch_transinfo(ahc, 2382 starget->channel + 'A', 2383 shost->this_id, starget->id, &tstate); 2384 struct ahc_devinfo devinfo; 2385 unsigned int ppr_options = tinfo->goal.ppr_options 2386 & ~MSG_EXT_PPR_DT_REQ; 2387 unsigned int period = tinfo->goal.period; 2388 unsigned int width = tinfo->goal.width; 2389 unsigned long flags; 2390 struct ahc_syncrate *syncrate; 2391 2392 if (dt && spi_max_width(starget)) { 2393 ppr_options |= MSG_EXT_PPR_DT_REQ; 2394 if (!width) 2395 ahc_linux_set_width(starget, 1); 2396 } else if (period == 9) 2397 period = 10; /* if resetting DT, period must be >= 25ns */ 2398 2399 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2400 starget->channel + 'A', ROLE_INITIATOR); 2401 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT); 2402 ahc_lock(ahc, &flags); 2403 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2404 ppr_options, AHC_TRANS_GOAL, FALSE); 2405 ahc_unlock(ahc, &flags); 2406 } 2407 2408 #if 0 2409 /* FIXME: This code claims to support IU and QAS. However, the actual 2410 * sequencer code and aic7xxx_core have no support for these parameters and 2411 * will get into a bad state if they're negotiated. Do not enable this 2412 * unless you know what you're doing */ 2413 static void ahc_linux_set_qas(struct scsi_target *starget, int qas) 2414 { 2415 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2416 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2417 struct ahc_tmode_tstate *tstate; 2418 struct ahc_initiator_tinfo *tinfo 2419 = ahc_fetch_transinfo(ahc, 2420 starget->channel + 'A', 2421 shost->this_id, starget->id, &tstate); 2422 struct ahc_devinfo devinfo; 2423 unsigned int ppr_options = tinfo->goal.ppr_options 2424 & ~MSG_EXT_PPR_QAS_REQ; 2425 unsigned int period = tinfo->goal.period; 2426 unsigned long flags; 2427 struct ahc_syncrate *syncrate; 2428 2429 if (qas) 2430 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2431 2432 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2433 starget->channel + 'A', ROLE_INITIATOR); 2434 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2435 ahc_lock(ahc, &flags); 2436 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2437 ppr_options, AHC_TRANS_GOAL, FALSE); 2438 ahc_unlock(ahc, &flags); 2439 } 2440 2441 static void ahc_linux_set_iu(struct scsi_target *starget, int iu) 2442 { 2443 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2444 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2445 struct ahc_tmode_tstate *tstate; 2446 struct ahc_initiator_tinfo *tinfo 2447 = ahc_fetch_transinfo(ahc, 2448 starget->channel + 'A', 2449 shost->this_id, starget->id, &tstate); 2450 struct ahc_devinfo devinfo; 2451 unsigned int ppr_options = tinfo->goal.ppr_options 2452 & ~MSG_EXT_PPR_IU_REQ; 2453 unsigned int period = tinfo->goal.period; 2454 unsigned long flags; 2455 struct ahc_syncrate *syncrate; 2456 2457 if (iu) 2458 ppr_options |= MSG_EXT_PPR_IU_REQ; 2459 2460 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2461 starget->channel + 'A', ROLE_INITIATOR); 2462 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2463 ahc_lock(ahc, &flags); 2464 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2465 ppr_options, AHC_TRANS_GOAL, FALSE); 2466 ahc_unlock(ahc, &flags); 2467 } 2468 #endif 2469 2470 static void ahc_linux_get_signalling(struct Scsi_Host *shost) 2471 { 2472 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata; 2473 unsigned long flags; 2474 u8 mode; 2475 2476 if (!(ahc->features & AHC_ULTRA2)) { 2477 /* non-LVD chipset, may not have SBLKCTL reg */ 2478 spi_signalling(shost) = 2479 ahc->features & AHC_HVD ? 2480 SPI_SIGNAL_HVD : 2481 SPI_SIGNAL_SE; 2482 return; 2483 } 2484 2485 ahc_lock(ahc, &flags); 2486 ahc_pause(ahc); 2487 mode = ahc_inb(ahc, SBLKCTL); 2488 ahc_unpause(ahc); 2489 ahc_unlock(ahc, &flags); 2490 2491 if (mode & ENAB40) 2492 spi_signalling(shost) = SPI_SIGNAL_LVD; 2493 else if (mode & ENAB20) 2494 spi_signalling(shost) = SPI_SIGNAL_SE; 2495 else 2496 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2497 } 2498 2499 static struct spi_function_template ahc_linux_transport_functions = { 2500 .set_offset = ahc_linux_set_offset, 2501 .show_offset = 1, 2502 .set_period = ahc_linux_set_period, 2503 .show_period = 1, 2504 .set_width = ahc_linux_set_width, 2505 .show_width = 1, 2506 .set_dt = ahc_linux_set_dt, 2507 .show_dt = 1, 2508 #if 0 2509 .set_iu = ahc_linux_set_iu, 2510 .show_iu = 1, 2511 .set_qas = ahc_linux_set_qas, 2512 .show_qas = 1, 2513 #endif 2514 .get_signalling = ahc_linux_get_signalling, 2515 }; 2516 2517 2518 2519 static int __init 2520 ahc_linux_init(void) 2521 { 2522 /* 2523 * If we've been passed any parameters, process them now. 2524 */ 2525 if (aic7xxx) 2526 aic7xxx_setup(aic7xxx); 2527 2528 ahc_linux_transport_template = 2529 spi_attach_transport(&ahc_linux_transport_functions); 2530 if (!ahc_linux_transport_template) 2531 return -ENODEV; 2532 2533 scsi_transport_reserve_device(ahc_linux_transport_template, 2534 sizeof(struct ahc_linux_device)); 2535 2536 ahc_linux_pci_init(); 2537 ahc_linux_eisa_init(); 2538 return 0; 2539 } 2540 2541 static void 2542 ahc_linux_exit(void) 2543 { 2544 ahc_linux_pci_exit(); 2545 ahc_linux_eisa_exit(); 2546 spi_release_transport(ahc_linux_transport_template); 2547 } 2548 2549 module_init(ahc_linux_init); 2550 module_exit(ahc_linux_exit); 2551