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: Justin T. Gibbs <gibbs@scsiguy.com>"); 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 Supress 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 .use_sg_chaining = ENABLE_SG_CHAINING, 751 .slave_alloc = ahc_linux_slave_alloc, 752 .slave_configure = ahc_linux_slave_configure, 753 .target_alloc = ahc_linux_target_alloc, 754 .target_destroy = ahc_linux_target_destroy, 755 }; 756 757 /**************************** Tasklet Handler *********************************/ 758 759 /******************************** Macros **************************************/ 760 #define BUILD_SCSIID(ahc, cmd) \ 761 ((((cmd)->device->id << TID_SHIFT) & TID) \ 762 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \ 763 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB)) 764 765 /******************************** Bus DMA *************************************/ 766 int 767 ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent, 768 bus_size_t alignment, bus_size_t boundary, 769 dma_addr_t lowaddr, dma_addr_t highaddr, 770 bus_dma_filter_t *filter, void *filterarg, 771 bus_size_t maxsize, int nsegments, 772 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 773 { 774 bus_dma_tag_t dmat; 775 776 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT); 777 if (dmat == NULL) 778 return (ENOMEM); 779 780 /* 781 * Linux is very simplistic about DMA memory. For now don't 782 * maintain all specification information. Once Linux supplies 783 * better facilities for doing these operations, or the 784 * needs of this particular driver change, we might need to do 785 * more here. 786 */ 787 dmat->alignment = alignment; 788 dmat->boundary = boundary; 789 dmat->maxsize = maxsize; 790 *ret_tag = dmat; 791 return (0); 792 } 793 794 void 795 ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat) 796 { 797 free(dmat, M_DEVBUF); 798 } 799 800 int 801 ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr, 802 int flags, bus_dmamap_t *mapp) 803 { 804 *vaddr = pci_alloc_consistent(ahc->dev_softc, 805 dmat->maxsize, mapp); 806 if (*vaddr == NULL) 807 return ENOMEM; 808 return 0; 809 } 810 811 void 812 ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat, 813 void* vaddr, bus_dmamap_t map) 814 { 815 pci_free_consistent(ahc->dev_softc, dmat->maxsize, 816 vaddr, map); 817 } 818 819 int 820 ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map, 821 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 822 void *cb_arg, int flags) 823 { 824 /* 825 * Assume for now that this will only be used during 826 * initialization and not for per-transaction buffer mapping. 827 */ 828 bus_dma_segment_t stack_sg; 829 830 stack_sg.ds_addr = map; 831 stack_sg.ds_len = dmat->maxsize; 832 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 833 return (0); 834 } 835 836 void 837 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 838 { 839 } 840 841 int 842 ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 843 { 844 /* Nothing to do */ 845 return (0); 846 } 847 848 static void 849 ahc_linux_setup_tag_info_global(char *p) 850 { 851 int tags, i, j; 852 853 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 854 printf("Setting Global Tags= %d\n", tags); 855 856 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) { 857 for (j = 0; j < AHC_NUM_TARGETS; j++) { 858 aic7xxx_tag_info[i].tag_commands[j] = tags; 859 } 860 } 861 } 862 863 static void 864 ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 865 { 866 867 if ((instance >= 0) && (targ >= 0) 868 && (instance < ARRAY_SIZE(aic7xxx_tag_info)) 869 && (targ < AHC_NUM_TARGETS)) { 870 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff; 871 if (bootverbose) 872 printf("tag_info[%d:%d] = %d\n", instance, targ, value); 873 } 874 } 875 876 static char * 877 ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 878 void (*callback)(u_long, int, int, int32_t), 879 u_long callback_arg) 880 { 881 char *tok_end; 882 char *tok_end2; 883 int i; 884 int instance; 885 int targ; 886 int done; 887 char tok_list[] = {'.', ',', '{', '}', '\0'}; 888 889 /* All options use a ':' name/arg separator */ 890 if (*opt_arg != ':') 891 return (opt_arg); 892 opt_arg++; 893 instance = -1; 894 targ = -1; 895 done = FALSE; 896 /* 897 * Restore separator that may be in 898 * the middle of our option argument. 899 */ 900 tok_end = strchr(opt_arg, '\0'); 901 if (tok_end < end) 902 *tok_end = ','; 903 while (!done) { 904 switch (*opt_arg) { 905 case '{': 906 if (instance == -1) { 907 instance = 0; 908 } else { 909 if (depth > 1) { 910 if (targ == -1) 911 targ = 0; 912 } else { 913 printf("Malformed Option %s\n", 914 opt_name); 915 done = TRUE; 916 } 917 } 918 opt_arg++; 919 break; 920 case '}': 921 if (targ != -1) 922 targ = -1; 923 else if (instance != -1) 924 instance = -1; 925 opt_arg++; 926 break; 927 case ',': 928 case '.': 929 if (instance == -1) 930 done = TRUE; 931 else if (targ >= 0) 932 targ++; 933 else if (instance >= 0) 934 instance++; 935 opt_arg++; 936 break; 937 case '\0': 938 done = TRUE; 939 break; 940 default: 941 tok_end = end; 942 for (i = 0; tok_list[i]; i++) { 943 tok_end2 = strchr(opt_arg, tok_list[i]); 944 if ((tok_end2) && (tok_end2 < tok_end)) 945 tok_end = tok_end2; 946 } 947 callback(callback_arg, instance, targ, 948 simple_strtol(opt_arg, NULL, 0)); 949 opt_arg = tok_end; 950 break; 951 } 952 } 953 return (opt_arg); 954 } 955 956 /* 957 * Handle Linux boot parameters. This routine allows for assigning a value 958 * to a parameter with a ':' between the parameter and the value. 959 * ie. aic7xxx=stpwlev:1,extended 960 */ 961 static int 962 aic7xxx_setup(char *s) 963 { 964 int i, n; 965 char *p; 966 char *end; 967 968 static struct { 969 const char *name; 970 uint32_t *flag; 971 } options[] = { 972 { "extended", &aic7xxx_extended }, 973 { "no_reset", &aic7xxx_no_reset }, 974 { "verbose", &aic7xxx_verbose }, 975 { "allow_memio", &aic7xxx_allow_memio}, 976 #ifdef AHC_DEBUG 977 { "debug", &ahc_debug }, 978 #endif 979 { "periodic_otag", &aic7xxx_periodic_otag }, 980 { "pci_parity", &aic7xxx_pci_parity }, 981 { "seltime", &aic7xxx_seltime }, 982 { "tag_info", NULL }, 983 { "global_tag_depth", NULL }, 984 { "dv", NULL } 985 }; 986 987 end = strchr(s, '\0'); 988 989 /* 990 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE 991 * will never be 0 in this case. 992 */ 993 n = 0; 994 995 while ((p = strsep(&s, ",.")) != NULL) { 996 if (*p == '\0') 997 continue; 998 for (i = 0; i < ARRAY_SIZE(options); i++) { 999 1000 n = strlen(options[i].name); 1001 if (strncmp(options[i].name, p, n) == 0) 1002 break; 1003 } 1004 if (i == ARRAY_SIZE(options)) 1005 continue; 1006 1007 if (strncmp(p, "global_tag_depth", n) == 0) { 1008 ahc_linux_setup_tag_info_global(p + n); 1009 } else if (strncmp(p, "tag_info", n) == 0) { 1010 s = ahc_parse_brace_option("tag_info", p + n, end, 1011 2, ahc_linux_setup_tag_info, 0); 1012 } else if (p[n] == ':') { 1013 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1014 } else if (strncmp(p, "verbose", n) == 0) { 1015 *(options[i].flag) = 1; 1016 } else { 1017 *(options[i].flag) ^= 0xFFFFFFFF; 1018 } 1019 } 1020 return 1; 1021 } 1022 1023 __setup("aic7xxx=", aic7xxx_setup); 1024 1025 uint32_t aic7xxx_verbose; 1026 1027 int 1028 ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template) 1029 { 1030 char buf[80]; 1031 struct Scsi_Host *host; 1032 char *new_name; 1033 u_long s; 1034 int retval; 1035 1036 template->name = ahc->description; 1037 host = scsi_host_alloc(template, sizeof(struct ahc_softc *)); 1038 if (host == NULL) 1039 return (ENOMEM); 1040 1041 *((struct ahc_softc **)host->hostdata) = ahc; 1042 ahc->platform_data->host = host; 1043 host->can_queue = AHC_MAX_QUEUE; 1044 host->cmd_per_lun = 2; 1045 /* XXX No way to communicate the ID for multiple channels */ 1046 host->this_id = ahc->our_id; 1047 host->irq = ahc->platform_data->irq; 1048 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8; 1049 host->max_lun = AHC_NUM_LUNS; 1050 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0; 1051 host->sg_tablesize = AHC_NSEG; 1052 ahc_lock(ahc, &s); 1053 ahc_set_unit(ahc, ahc_linux_unit++); 1054 ahc_unlock(ahc, &s); 1055 sprintf(buf, "scsi%d", host->host_no); 1056 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); 1057 if (new_name != NULL) { 1058 strcpy(new_name, buf); 1059 ahc_set_name(ahc, new_name); 1060 } 1061 host->unique_id = ahc->unit; 1062 ahc_linux_initialize_scsi_bus(ahc); 1063 ahc_intr_enable(ahc, TRUE); 1064 1065 host->transportt = ahc_linux_transport_template; 1066 1067 retval = scsi_add_host(host, 1068 (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); 1069 if (retval) { 1070 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n"); 1071 scsi_host_put(host); 1072 return retval; 1073 } 1074 1075 scsi_scan_host(host); 1076 return 0; 1077 } 1078 1079 /* 1080 * Place the SCSI bus into a known state by either resetting it, 1081 * or forcing transfer negotiations on the next command to any 1082 * target. 1083 */ 1084 void 1085 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc) 1086 { 1087 int i; 1088 int numtarg; 1089 unsigned long s; 1090 1091 i = 0; 1092 numtarg = 0; 1093 1094 ahc_lock(ahc, &s); 1095 1096 if (aic7xxx_no_reset != 0) 1097 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B); 1098 1099 if ((ahc->flags & AHC_RESET_BUS_A) != 0) 1100 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE); 1101 else 1102 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8; 1103 1104 if ((ahc->features & AHC_TWIN) != 0) { 1105 1106 if ((ahc->flags & AHC_RESET_BUS_B) != 0) { 1107 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE); 1108 } else { 1109 if (numtarg == 0) 1110 i = 8; 1111 numtarg += 8; 1112 } 1113 } 1114 1115 /* 1116 * Force negotiation to async for all targets that 1117 * will not see an initial bus reset. 1118 */ 1119 for (; i < numtarg; i++) { 1120 struct ahc_devinfo devinfo; 1121 struct ahc_initiator_tinfo *tinfo; 1122 struct ahc_tmode_tstate *tstate; 1123 u_int our_id; 1124 u_int target_id; 1125 char channel; 1126 1127 channel = 'A'; 1128 our_id = ahc->our_id; 1129 target_id = i; 1130 if (i > 7 && (ahc->features & AHC_TWIN) != 0) { 1131 channel = 'B'; 1132 our_id = ahc->our_id_b; 1133 target_id = i % 8; 1134 } 1135 tinfo = ahc_fetch_transinfo(ahc, channel, our_id, 1136 target_id, &tstate); 1137 ahc_compile_devinfo(&devinfo, our_id, target_id, 1138 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR); 1139 ahc_update_neg_request(ahc, &devinfo, tstate, 1140 tinfo, AHC_NEG_ALWAYS); 1141 } 1142 ahc_unlock(ahc, &s); 1143 /* Give the bus some time to recover */ 1144 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) { 1145 ahc_linux_freeze_simq(ahc); 1146 msleep(AIC7XXX_RESET_DELAY); 1147 ahc_linux_release_simq(ahc); 1148 } 1149 } 1150 1151 int 1152 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg) 1153 { 1154 1155 ahc->platform_data = 1156 malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT); 1157 if (ahc->platform_data == NULL) 1158 return (ENOMEM); 1159 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data)); 1160 ahc->platform_data->irq = AHC_LINUX_NOIRQ; 1161 ahc_lockinit(ahc); 1162 ahc->seltime = (aic7xxx_seltime & 0x3) << 4; 1163 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4; 1164 if (aic7xxx_pci_parity == 0) 1165 ahc->flags |= AHC_DISABLE_PCI_PERR; 1166 1167 return (0); 1168 } 1169 1170 void 1171 ahc_platform_free(struct ahc_softc *ahc) 1172 { 1173 struct scsi_target *starget; 1174 int i; 1175 1176 if (ahc->platform_data != NULL) { 1177 /* destroy all of the device and target objects */ 1178 for (i = 0; i < AHC_NUM_TARGETS; i++) { 1179 starget = ahc->platform_data->starget[i]; 1180 if (starget != NULL) { 1181 ahc->platform_data->starget[i] = NULL; 1182 } 1183 } 1184 1185 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ) 1186 free_irq(ahc->platform_data->irq, ahc); 1187 if (ahc->tag == BUS_SPACE_PIO 1188 && ahc->bsh.ioport != 0) 1189 release_region(ahc->bsh.ioport, 256); 1190 if (ahc->tag == BUS_SPACE_MEMIO 1191 && ahc->bsh.maddr != NULL) { 1192 iounmap(ahc->bsh.maddr); 1193 release_mem_region(ahc->platform_data->mem_busaddr, 1194 0x1000); 1195 } 1196 1197 if (ahc->platform_data->host) 1198 scsi_host_put(ahc->platform_data->host); 1199 1200 free(ahc->platform_data, M_DEVBUF); 1201 } 1202 } 1203 1204 void 1205 ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb) 1206 { 1207 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb), 1208 SCB_GET_CHANNEL(ahc, scb), 1209 SCB_GET_LUN(scb), SCB_LIST_NULL, 1210 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1211 } 1212 1213 void 1214 ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev, 1215 struct ahc_devinfo *devinfo, ahc_queue_alg alg) 1216 { 1217 struct ahc_linux_device *dev; 1218 int was_queuing; 1219 int now_queuing; 1220 1221 if (sdev == NULL) 1222 return; 1223 dev = scsi_transport_device_data(sdev); 1224 1225 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED); 1226 switch (alg) { 1227 default: 1228 case AHC_QUEUE_NONE: 1229 now_queuing = 0; 1230 break; 1231 case AHC_QUEUE_BASIC: 1232 now_queuing = AHC_DEV_Q_BASIC; 1233 break; 1234 case AHC_QUEUE_TAGGED: 1235 now_queuing = AHC_DEV_Q_TAGGED; 1236 break; 1237 } 1238 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0 1239 && (was_queuing != now_queuing) 1240 && (dev->active != 0)) { 1241 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY; 1242 dev->qfrozen++; 1243 } 1244 1245 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG); 1246 if (now_queuing) { 1247 u_int usertags; 1248 1249 usertags = ahc_linux_user_tagdepth(ahc, devinfo); 1250 if (!was_queuing) { 1251 /* 1252 * Start out agressively and allow our 1253 * dynamic queue depth algorithm to take 1254 * care of the rest. 1255 */ 1256 dev->maxtags = usertags; 1257 dev->openings = dev->maxtags - dev->active; 1258 } 1259 if (dev->maxtags == 0) { 1260 /* 1261 * Queueing is disabled by the user. 1262 */ 1263 dev->openings = 1; 1264 } else if (alg == AHC_QUEUE_TAGGED) { 1265 dev->flags |= AHC_DEV_Q_TAGGED; 1266 if (aic7xxx_periodic_otag != 0) 1267 dev->flags |= AHC_DEV_PERIODIC_OTAG; 1268 } else 1269 dev->flags |= AHC_DEV_Q_BASIC; 1270 } else { 1271 /* We can only have one opening. */ 1272 dev->maxtags = 0; 1273 dev->openings = 1 - dev->active; 1274 } 1275 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) { 1276 case AHC_DEV_Q_BASIC: 1277 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); 1278 scsi_activate_tcq(sdev, dev->openings + dev->active); 1279 break; 1280 case AHC_DEV_Q_TAGGED: 1281 scsi_set_tag_type(sdev, MSG_ORDERED_TAG); 1282 scsi_activate_tcq(sdev, dev->openings + dev->active); 1283 break; 1284 default: 1285 /* 1286 * We allow the OS to queue 2 untagged transactions to 1287 * us at any time even though we can only execute them 1288 * serially on the controller/device. This should 1289 * remove some latency. 1290 */ 1291 scsi_deactivate_tcq(sdev, 2); 1292 break; 1293 } 1294 } 1295 1296 int 1297 ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel, 1298 int lun, u_int tag, role_t role, uint32_t status) 1299 { 1300 return 0; 1301 } 1302 1303 static u_int 1304 ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 1305 { 1306 static int warned_user; 1307 u_int tags; 1308 1309 tags = 0; 1310 if ((ahc->user_discenable & devinfo->target_mask) != 0) { 1311 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) { 1312 if (warned_user == 0) { 1313 1314 printf(KERN_WARNING 1315 "aic7xxx: WARNING: Insufficient tag_info instances\n" 1316 "aic7xxx: for installed controllers. Using defaults\n" 1317 "aic7xxx: Please update the aic7xxx_tag_info array in\n" 1318 "aic7xxx: the aic7xxx_osm..c source file.\n"); 1319 warned_user++; 1320 } 1321 tags = AHC_MAX_QUEUE; 1322 } else { 1323 adapter_tag_info_t *tag_info; 1324 1325 tag_info = &aic7xxx_tag_info[ahc->unit]; 1326 tags = tag_info->tag_commands[devinfo->target_offset]; 1327 if (tags > AHC_MAX_QUEUE) 1328 tags = AHC_MAX_QUEUE; 1329 } 1330 } 1331 return (tags); 1332 } 1333 1334 /* 1335 * Determines the queue depth for a given device. 1336 */ 1337 static void 1338 ahc_linux_device_queue_depth(struct scsi_device *sdev) 1339 { 1340 struct ahc_devinfo devinfo; 1341 u_int tags; 1342 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata); 1343 1344 ahc_compile_devinfo(&devinfo, 1345 sdev->sdev_target->channel == 0 1346 ? ahc->our_id : ahc->our_id_b, 1347 sdev->sdev_target->id, sdev->lun, 1348 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1349 ROLE_INITIATOR); 1350 tags = ahc_linux_user_tagdepth(ahc, &devinfo); 1351 if (tags != 0 && sdev->tagged_supported != 0) { 1352 1353 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED); 1354 ahc_send_async(ahc, devinfo.channel, devinfo.target, 1355 devinfo.lun, AC_TRANSFER_NEG); 1356 ahc_print_devinfo(ahc, &devinfo); 1357 printf("Tagged Queuing enabled. Depth %d\n", tags); 1358 } else { 1359 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE); 1360 ahc_send_async(ahc, devinfo.channel, devinfo.target, 1361 devinfo.lun, AC_TRANSFER_NEG); 1362 } 1363 } 1364 1365 static int 1366 ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev, 1367 struct scsi_cmnd *cmd) 1368 { 1369 struct scb *scb; 1370 struct hardware_scb *hscb; 1371 struct ahc_initiator_tinfo *tinfo; 1372 struct ahc_tmode_tstate *tstate; 1373 uint16_t mask; 1374 struct scb_tailq *untagged_q = NULL; 1375 int nseg; 1376 1377 /* 1378 * Schedule us to run later. The only reason we are not 1379 * running is because the whole controller Q is frozen. 1380 */ 1381 if (ahc->platform_data->qfrozen != 0) 1382 return SCSI_MLQUEUE_HOST_BUSY; 1383 1384 /* 1385 * We only allow one untagged transaction 1386 * per target in the initiator role unless 1387 * we are storing a full busy target *lun* 1388 * table in SCB space. 1389 */ 1390 if (!blk_rq_tagged(cmd->request) 1391 && (ahc->features & AHC_SCB_BTT) == 0) { 1392 int target_offset; 1393 1394 target_offset = cmd->device->id + cmd->device->channel * 8; 1395 untagged_q = &(ahc->untagged_queues[target_offset]); 1396 if (!TAILQ_EMPTY(untagged_q)) 1397 /* if we're already executing an untagged command 1398 * we're busy to another */ 1399 return SCSI_MLQUEUE_DEVICE_BUSY; 1400 } 1401 1402 /* 1403 * Get an scb to use. 1404 */ 1405 scb = ahc_get_scb(ahc); 1406 if (!scb) 1407 return SCSI_MLQUEUE_HOST_BUSY; 1408 1409 scb->io_ctx = cmd; 1410 scb->platform_data->dev = dev; 1411 hscb = scb->hscb; 1412 cmd->host_scribble = (char *)scb; 1413 1414 /* 1415 * Fill out basics of the HSCB. 1416 */ 1417 hscb->control = 0; 1418 hscb->scsiid = BUILD_SCSIID(ahc, cmd); 1419 hscb->lun = cmd->device->lun; 1420 mask = SCB_GET_TARGET_MASK(ahc, scb); 1421 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb), 1422 SCB_GET_OUR_ID(scb), 1423 SCB_GET_TARGET(ahc, scb), &tstate); 1424 hscb->scsirate = tinfo->scsirate; 1425 hscb->scsioffset = tinfo->curr.offset; 1426 if ((tstate->ultraenb & mask) != 0) 1427 hscb->control |= ULTRAENB; 1428 1429 if ((ahc->user_discenable & mask) != 0) 1430 hscb->control |= DISCENB; 1431 1432 if ((tstate->auto_negotiate & mask) != 0) { 1433 scb->flags |= SCB_AUTO_NEGOTIATE; 1434 scb->hscb->control |= MK_MESSAGE; 1435 } 1436 1437 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) { 1438 int msg_bytes; 1439 uint8_t tag_msgs[2]; 1440 1441 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); 1442 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { 1443 hscb->control |= tag_msgs[0]; 1444 if (tag_msgs[0] == MSG_ORDERED_TASK) 1445 dev->commands_since_idle_or_otag = 0; 1446 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH 1447 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) { 1448 hscb->control |= MSG_ORDERED_TASK; 1449 dev->commands_since_idle_or_otag = 0; 1450 } else { 1451 hscb->control |= MSG_SIMPLE_TASK; 1452 } 1453 } 1454 1455 hscb->cdb_len = cmd->cmd_len; 1456 if (hscb->cdb_len <= 12) { 1457 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len); 1458 } else { 1459 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len); 1460 scb->flags |= SCB_CDB32_PTR; 1461 } 1462 1463 scb->platform_data->xfer_len = 0; 1464 ahc_set_residual(scb, 0); 1465 ahc_set_sense_residual(scb, 0); 1466 scb->sg_count = 0; 1467 1468 nseg = scsi_dma_map(cmd); 1469 BUG_ON(nseg < 0); 1470 if (nseg > 0) { 1471 struct ahc_dma_seg *sg; 1472 struct scatterlist *cur_seg; 1473 int i; 1474 1475 /* Copy the segments into the SG list. */ 1476 sg = scb->sg_list; 1477 /* 1478 * The sg_count may be larger than nseg if 1479 * a transfer crosses a 32bit page. 1480 */ 1481 scsi_for_each_sg(cmd, cur_seg, nseg, i) { 1482 dma_addr_t addr; 1483 bus_size_t len; 1484 int consumed; 1485 1486 addr = sg_dma_address(cur_seg); 1487 len = sg_dma_len(cur_seg); 1488 consumed = ahc_linux_map_seg(ahc, scb, 1489 sg, addr, len); 1490 sg += consumed; 1491 scb->sg_count += consumed; 1492 } 1493 sg--; 1494 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); 1495 1496 /* 1497 * Reset the sg list pointer. 1498 */ 1499 scb->hscb->sgptr = 1500 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); 1501 1502 /* 1503 * Copy the first SG into the "current" 1504 * data pointer area. 1505 */ 1506 scb->hscb->dataptr = scb->sg_list->addr; 1507 scb->hscb->datacnt = scb->sg_list->len; 1508 } else { 1509 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL); 1510 scb->hscb->dataptr = 0; 1511 scb->hscb->datacnt = 0; 1512 scb->sg_count = 0; 1513 } 1514 1515 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links); 1516 dev->openings--; 1517 dev->active++; 1518 dev->commands_issued++; 1519 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0) 1520 dev->commands_since_idle_or_otag++; 1521 1522 scb->flags |= SCB_ACTIVE; 1523 if (untagged_q) { 1524 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe); 1525 scb->flags |= SCB_UNTAGGEDQ; 1526 } 1527 ahc_queue_scb(ahc, scb); 1528 return 0; 1529 } 1530 1531 /* 1532 * SCSI controller interrupt handler. 1533 */ 1534 irqreturn_t 1535 ahc_linux_isr(int irq, void *dev_id) 1536 { 1537 struct ahc_softc *ahc; 1538 u_long flags; 1539 int ours; 1540 1541 ahc = (struct ahc_softc *) dev_id; 1542 ahc_lock(ahc, &flags); 1543 ours = ahc_intr(ahc); 1544 ahc_unlock(ahc, &flags); 1545 return IRQ_RETVAL(ours); 1546 } 1547 1548 void 1549 ahc_platform_flushwork(struct ahc_softc *ahc) 1550 { 1551 1552 } 1553 1554 void 1555 ahc_send_async(struct ahc_softc *ahc, char channel, 1556 u_int target, u_int lun, ac_code code) 1557 { 1558 switch (code) { 1559 case AC_TRANSFER_NEG: 1560 { 1561 char buf[80]; 1562 struct scsi_target *starget; 1563 struct ahc_linux_target *targ; 1564 struct info_str info; 1565 struct ahc_initiator_tinfo *tinfo; 1566 struct ahc_tmode_tstate *tstate; 1567 int target_offset; 1568 unsigned int target_ppr_options; 1569 1570 BUG_ON(target == CAM_TARGET_WILDCARD); 1571 1572 info.buffer = buf; 1573 info.length = sizeof(buf); 1574 info.offset = 0; 1575 info.pos = 0; 1576 tinfo = ahc_fetch_transinfo(ahc, channel, 1577 channel == 'A' ? ahc->our_id 1578 : ahc->our_id_b, 1579 target, &tstate); 1580 1581 /* 1582 * Don't bother reporting results while 1583 * negotiations are still pending. 1584 */ 1585 if (tinfo->curr.period != tinfo->goal.period 1586 || tinfo->curr.width != tinfo->goal.width 1587 || tinfo->curr.offset != tinfo->goal.offset 1588 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1589 if (bootverbose == 0) 1590 break; 1591 1592 /* 1593 * Don't bother reporting results that 1594 * are identical to those last reported. 1595 */ 1596 target_offset = target; 1597 if (channel == 'B') 1598 target_offset += 8; 1599 starget = ahc->platform_data->starget[target_offset]; 1600 if (starget == NULL) 1601 break; 1602 targ = scsi_transport_target_data(starget); 1603 1604 target_ppr_options = 1605 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1606 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1607 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0); 1608 1609 if (tinfo->curr.period == spi_period(starget) 1610 && tinfo->curr.width == spi_width(starget) 1611 && tinfo->curr.offset == spi_offset(starget) 1612 && tinfo->curr.ppr_options == target_ppr_options) 1613 if (bootverbose == 0) 1614 break; 1615 1616 spi_period(starget) = tinfo->curr.period; 1617 spi_width(starget) = tinfo->curr.width; 1618 spi_offset(starget) = tinfo->curr.offset; 1619 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1620 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1621 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1622 spi_display_xfer_agreement(starget); 1623 break; 1624 } 1625 case AC_SENT_BDR: 1626 { 1627 WARN_ON(lun != CAM_LUN_WILDCARD); 1628 scsi_report_device_reset(ahc->platform_data->host, 1629 channel - 'A', target); 1630 break; 1631 } 1632 case AC_BUS_RESET: 1633 if (ahc->platform_data->host != NULL) { 1634 scsi_report_bus_reset(ahc->platform_data->host, 1635 channel - 'A'); 1636 } 1637 break; 1638 default: 1639 panic("ahc_send_async: Unexpected async event"); 1640 } 1641 } 1642 1643 /* 1644 * Calls the higher level scsi done function and frees the scb. 1645 */ 1646 void 1647 ahc_done(struct ahc_softc *ahc, struct scb *scb) 1648 { 1649 struct scsi_cmnd *cmd; 1650 struct ahc_linux_device *dev; 1651 1652 LIST_REMOVE(scb, pending_links); 1653 if ((scb->flags & SCB_UNTAGGEDQ) != 0) { 1654 struct scb_tailq *untagged_q; 1655 int target_offset; 1656 1657 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); 1658 untagged_q = &(ahc->untagged_queues[target_offset]); 1659 TAILQ_REMOVE(untagged_q, scb, links.tqe); 1660 BUG_ON(!TAILQ_EMPTY(untagged_q)); 1661 } 1662 1663 if ((scb->flags & SCB_ACTIVE) == 0) { 1664 printf("SCB %d done'd twice\n", scb->hscb->tag); 1665 ahc_dump_card_state(ahc); 1666 panic("Stopping for safety"); 1667 } 1668 cmd = scb->io_ctx; 1669 dev = scb->platform_data->dev; 1670 dev->active--; 1671 dev->openings++; 1672 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1673 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1674 dev->qfrozen--; 1675 } 1676 ahc_linux_unmap_scb(ahc, scb); 1677 1678 /* 1679 * Guard against stale sense data. 1680 * The Linux mid-layer assumes that sense 1681 * was retrieved anytime the first byte of 1682 * the sense buffer looks "sane". 1683 */ 1684 cmd->sense_buffer[0] = 0; 1685 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) { 1686 uint32_t amount_xferred; 1687 1688 amount_xferred = 1689 ahc_get_transfer_length(scb) - ahc_get_residual(scb); 1690 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1691 #ifdef AHC_DEBUG 1692 if ((ahc_debug & AHC_SHOW_MISC) != 0) { 1693 ahc_print_path(ahc, scb); 1694 printf("Set CAM_UNCOR_PARITY\n"); 1695 } 1696 #endif 1697 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY); 1698 #ifdef AHC_REPORT_UNDERFLOWS 1699 /* 1700 * This code is disabled by default as some 1701 * clients of the SCSI system do not properly 1702 * initialize the underflow parameter. This 1703 * results in spurious termination of commands 1704 * that complete as expected (e.g. underflow is 1705 * allowed as command can return variable amounts 1706 * of data. 1707 */ 1708 } else if (amount_xferred < scb->io_ctx->underflow) { 1709 u_int i; 1710 1711 ahc_print_path(ahc, scb); 1712 printf("CDB:"); 1713 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1714 printf(" 0x%x", scb->io_ctx->cmnd[i]); 1715 printf("\n"); 1716 ahc_print_path(ahc, scb); 1717 printf("Saw underflow (%ld of %ld bytes). " 1718 "Treated as error\n", 1719 ahc_get_residual(scb), 1720 ahc_get_transfer_length(scb)); 1721 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1722 #endif 1723 } else { 1724 ahc_set_transaction_status(scb, CAM_REQ_CMP); 1725 } 1726 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1727 ahc_linux_handle_scsi_status(ahc, cmd->device, scb); 1728 } 1729 1730 if (dev->openings == 1 1731 && ahc_get_transaction_status(scb) == CAM_REQ_CMP 1732 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1733 dev->tag_success_count++; 1734 /* 1735 * Some devices deal with temporary internal resource 1736 * shortages by returning queue full. When the queue 1737 * full occurrs, we throttle back. Slowly try to get 1738 * back to our previous queue depth. 1739 */ 1740 if ((dev->openings + dev->active) < dev->maxtags 1741 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) { 1742 dev->tag_success_count = 0; 1743 dev->openings++; 1744 } 1745 1746 if (dev->active == 0) 1747 dev->commands_since_idle_or_otag = 0; 1748 1749 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1750 printf("Recovery SCB completes\n"); 1751 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT 1752 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED) 1753 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1754 1755 if (ahc->platform_data->eh_done) 1756 complete(ahc->platform_data->eh_done); 1757 } 1758 1759 ahc_free_scb(ahc, scb); 1760 ahc_linux_queue_cmd_complete(ahc, cmd); 1761 } 1762 1763 static void 1764 ahc_linux_handle_scsi_status(struct ahc_softc *ahc, 1765 struct scsi_device *sdev, struct scb *scb) 1766 { 1767 struct ahc_devinfo devinfo; 1768 struct ahc_linux_device *dev = scsi_transport_device_data(sdev); 1769 1770 ahc_compile_devinfo(&devinfo, 1771 ahc->our_id, 1772 sdev->sdev_target->id, sdev->lun, 1773 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1774 ROLE_INITIATOR); 1775 1776 /* 1777 * We don't currently trust the mid-layer to 1778 * properly deal with queue full or busy. So, 1779 * when one occurs, we tell the mid-layer to 1780 * unconditionally requeue the command to us 1781 * so that we can retry it ourselves. We also 1782 * implement our own throttling mechanism so 1783 * we don't clobber the device with too many 1784 * commands. 1785 */ 1786 switch (ahc_get_scsi_status(scb)) { 1787 default: 1788 break; 1789 case SCSI_STATUS_CHECK_COND: 1790 case SCSI_STATUS_CMD_TERMINATED: 1791 { 1792 struct scsi_cmnd *cmd; 1793 1794 /* 1795 * Copy sense information to the OS's cmd 1796 * structure if it is available. 1797 */ 1798 cmd = scb->io_ctx; 1799 if (scb->flags & SCB_SENSE) { 1800 u_int sense_size; 1801 1802 sense_size = min(sizeof(struct scsi_sense_data) 1803 - ahc_get_sense_residual(scb), 1804 (u_long)sizeof(cmd->sense_buffer)); 1805 memcpy(cmd->sense_buffer, 1806 ahc_get_sense_buf(ahc, scb), sense_size); 1807 if (sense_size < sizeof(cmd->sense_buffer)) 1808 memset(&cmd->sense_buffer[sense_size], 0, 1809 sizeof(cmd->sense_buffer) - sense_size); 1810 cmd->result |= (DRIVER_SENSE << 24); 1811 #ifdef AHC_DEBUG 1812 if (ahc_debug & AHC_SHOW_SENSE) { 1813 int i; 1814 1815 printf("Copied %d bytes of sense data:", 1816 sense_size); 1817 for (i = 0; i < sense_size; i++) { 1818 if ((i & 0xF) == 0) 1819 printf("\n"); 1820 printf("0x%x ", cmd->sense_buffer[i]); 1821 } 1822 printf("\n"); 1823 } 1824 #endif 1825 } 1826 break; 1827 } 1828 case SCSI_STATUS_QUEUE_FULL: 1829 { 1830 /* 1831 * By the time the core driver has returned this 1832 * command, all other commands that were queued 1833 * to us but not the device have been returned. 1834 * This ensures that dev->active is equal to 1835 * the number of commands actually queued to 1836 * the device. 1837 */ 1838 dev->tag_success_count = 0; 1839 if (dev->active != 0) { 1840 /* 1841 * Drop our opening count to the number 1842 * of commands currently outstanding. 1843 */ 1844 dev->openings = 0; 1845 /* 1846 ahc_print_path(ahc, scb); 1847 printf("Dropping tag count to %d\n", dev->active); 1848 */ 1849 if (dev->active == dev->tags_on_last_queuefull) { 1850 1851 dev->last_queuefull_same_count++; 1852 /* 1853 * If we repeatedly see a queue full 1854 * at the same queue depth, this 1855 * device has a fixed number of tag 1856 * slots. Lock in this tag depth 1857 * so we stop seeing queue fulls from 1858 * this device. 1859 */ 1860 if (dev->last_queuefull_same_count 1861 == AHC_LOCK_TAGS_COUNT) { 1862 dev->maxtags = dev->active; 1863 ahc_print_path(ahc, scb); 1864 printf("Locking max tag count at %d\n", 1865 dev->active); 1866 } 1867 } else { 1868 dev->tags_on_last_queuefull = dev->active; 1869 dev->last_queuefull_same_count = 0; 1870 } 1871 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ); 1872 ahc_set_scsi_status(scb, SCSI_STATUS_OK); 1873 ahc_platform_set_tags(ahc, sdev, &devinfo, 1874 (dev->flags & AHC_DEV_Q_BASIC) 1875 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1876 break; 1877 } 1878 /* 1879 * Drop down to a single opening, and treat this 1880 * as if the target returned BUSY SCSI status. 1881 */ 1882 dev->openings = 1; 1883 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY); 1884 ahc_platform_set_tags(ahc, sdev, &devinfo, 1885 (dev->flags & AHC_DEV_Q_BASIC) 1886 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1887 break; 1888 } 1889 } 1890 } 1891 1892 static void 1893 ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd) 1894 { 1895 /* 1896 * Map CAM error codes into Linux Error codes. We 1897 * avoid the conversion so that the DV code has the 1898 * full error information available when making 1899 * state change decisions. 1900 */ 1901 { 1902 u_int new_status; 1903 1904 switch (ahc_cmd_get_transaction_status(cmd)) { 1905 case CAM_REQ_INPROG: 1906 case CAM_REQ_CMP: 1907 case CAM_SCSI_STATUS_ERROR: 1908 new_status = DID_OK; 1909 break; 1910 case CAM_REQ_ABORTED: 1911 new_status = DID_ABORT; 1912 break; 1913 case CAM_BUSY: 1914 new_status = DID_BUS_BUSY; 1915 break; 1916 case CAM_REQ_INVALID: 1917 case CAM_PATH_INVALID: 1918 new_status = DID_BAD_TARGET; 1919 break; 1920 case CAM_SEL_TIMEOUT: 1921 new_status = DID_NO_CONNECT; 1922 break; 1923 case CAM_SCSI_BUS_RESET: 1924 case CAM_BDR_SENT: 1925 new_status = DID_RESET; 1926 break; 1927 case CAM_UNCOR_PARITY: 1928 new_status = DID_PARITY; 1929 break; 1930 case CAM_CMD_TIMEOUT: 1931 new_status = DID_TIME_OUT; 1932 break; 1933 case CAM_UA_ABORT: 1934 case CAM_REQ_CMP_ERR: 1935 case CAM_AUTOSENSE_FAIL: 1936 case CAM_NO_HBA: 1937 case CAM_DATA_RUN_ERR: 1938 case CAM_UNEXP_BUSFREE: 1939 case CAM_SEQUENCE_FAIL: 1940 case CAM_CCB_LEN_ERR: 1941 case CAM_PROVIDE_FAIL: 1942 case CAM_REQ_TERMIO: 1943 case CAM_UNREC_HBA_ERROR: 1944 case CAM_REQ_TOO_BIG: 1945 new_status = DID_ERROR; 1946 break; 1947 case CAM_REQUEUE_REQ: 1948 new_status = DID_REQUEUE; 1949 break; 1950 default: 1951 /* We should never get here */ 1952 new_status = DID_ERROR; 1953 break; 1954 } 1955 1956 ahc_cmd_set_transaction_status(cmd, new_status); 1957 } 1958 1959 cmd->scsi_done(cmd); 1960 } 1961 1962 static void 1963 ahc_linux_freeze_simq(struct ahc_softc *ahc) 1964 { 1965 unsigned long s; 1966 1967 ahc_lock(ahc, &s); 1968 ahc->platform_data->qfrozen++; 1969 if (ahc->platform_data->qfrozen == 1) { 1970 scsi_block_requests(ahc->platform_data->host); 1971 1972 /* XXX What about Twin channels? */ 1973 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, 1974 CAM_LUN_WILDCARD, SCB_LIST_NULL, 1975 ROLE_INITIATOR, CAM_REQUEUE_REQ); 1976 } 1977 ahc_unlock(ahc, &s); 1978 } 1979 1980 static void 1981 ahc_linux_release_simq(struct ahc_softc *ahc) 1982 { 1983 u_long s; 1984 int unblock_reqs; 1985 1986 unblock_reqs = 0; 1987 ahc_lock(ahc, &s); 1988 if (ahc->platform_data->qfrozen > 0) 1989 ahc->platform_data->qfrozen--; 1990 if (ahc->platform_data->qfrozen == 0) 1991 unblock_reqs = 1; 1992 ahc_unlock(ahc, &s); 1993 /* 1994 * There is still a race here. The mid-layer 1995 * should keep its own freeze count and use 1996 * a bottom half handler to run the queues 1997 * so we can unblock with our own lock held. 1998 */ 1999 if (unblock_reqs) 2000 scsi_unblock_requests(ahc->platform_data->host); 2001 } 2002 2003 static int 2004 ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag) 2005 { 2006 struct ahc_softc *ahc; 2007 struct ahc_linux_device *dev; 2008 struct scb *pending_scb; 2009 u_int saved_scbptr; 2010 u_int active_scb_index; 2011 u_int last_phase; 2012 u_int saved_scsiid; 2013 u_int cdb_byte; 2014 int retval; 2015 int was_paused; 2016 int paused; 2017 int wait; 2018 int disconnected; 2019 unsigned long flags; 2020 2021 pending_scb = NULL; 2022 paused = FALSE; 2023 wait = FALSE; 2024 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 2025 2026 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n", 2027 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET"); 2028 2029 printf("CDB:"); 2030 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2031 printf(" 0x%x", cmd->cmnd[cdb_byte]); 2032 printf("\n"); 2033 2034 ahc_lock(ahc, &flags); 2035 2036 /* 2037 * First determine if we currently own this command. 2038 * Start by searching the device queue. If not found 2039 * there, check the pending_scb list. If not found 2040 * at all, and the system wanted us to just abort the 2041 * command, return success. 2042 */ 2043 dev = scsi_transport_device_data(cmd->device); 2044 2045 if (dev == NULL) { 2046 /* 2047 * No target device for this command exists, 2048 * so we must not still own the command. 2049 */ 2050 printf("%s:%d:%d:%d: Is not an active device\n", 2051 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2052 cmd->device->lun); 2053 retval = SUCCESS; 2054 goto no_cmd; 2055 } 2056 2057 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0 2058 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id, 2059 cmd->device->channel + 'A', 2060 cmd->device->lun, 2061 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) { 2062 printf("%s:%d:%d:%d: Command found on untagged queue\n", 2063 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2064 cmd->device->lun); 2065 retval = SUCCESS; 2066 goto done; 2067 } 2068 2069 /* 2070 * See if we can find a matching cmd in the pending list. 2071 */ 2072 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2073 if (pending_scb->io_ctx == cmd) 2074 break; 2075 } 2076 2077 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) { 2078 2079 /* Any SCB for this device will do for a target reset */ 2080 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2081 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd), 2082 scmd_channel(cmd) + 'A', 2083 CAM_LUN_WILDCARD, 2084 SCB_LIST_NULL, ROLE_INITIATOR)) 2085 break; 2086 } 2087 } 2088 2089 if (pending_scb == NULL) { 2090 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2091 goto no_cmd; 2092 } 2093 2094 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2095 /* 2096 * We can't queue two recovery actions using the same SCB 2097 */ 2098 retval = FAILED; 2099 goto done; 2100 } 2101 2102 /* 2103 * Ensure that the card doesn't do anything 2104 * behind our back and that we didn't "just" miss 2105 * an interrupt that would affect this cmd. 2106 */ 2107 was_paused = ahc_is_paused(ahc); 2108 ahc_pause_and_flushwork(ahc); 2109 paused = TRUE; 2110 2111 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2112 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2113 goto no_cmd; 2114 } 2115 2116 printf("%s: At time of recovery, card was %spaused\n", 2117 ahc_name(ahc), was_paused ? "" : "not "); 2118 ahc_dump_card_state(ahc); 2119 2120 disconnected = TRUE; 2121 if (flag == SCB_ABORT) { 2122 if (ahc_search_qinfifo(ahc, cmd->device->id, 2123 cmd->device->channel + 'A', 2124 cmd->device->lun, 2125 pending_scb->hscb->tag, 2126 ROLE_INITIATOR, CAM_REQ_ABORTED, 2127 SEARCH_COMPLETE) > 0) { 2128 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2129 ahc_name(ahc), cmd->device->channel, 2130 cmd->device->id, cmd->device->lun); 2131 retval = SUCCESS; 2132 goto done; 2133 } 2134 } else if (ahc_search_qinfifo(ahc, cmd->device->id, 2135 cmd->device->channel + 'A', 2136 cmd->device->lun, pending_scb->hscb->tag, 2137 ROLE_INITIATOR, /*status*/0, 2138 SEARCH_COUNT) > 0) { 2139 disconnected = FALSE; 2140 } 2141 2142 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2143 struct scb *bus_scb; 2144 2145 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG)); 2146 if (bus_scb == pending_scb) 2147 disconnected = FALSE; 2148 else if (flag != SCB_ABORT 2149 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid 2150 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb)) 2151 disconnected = FALSE; 2152 } 2153 2154 /* 2155 * At this point, pending_scb is the scb associated with the 2156 * passed in command. That command is currently active on the 2157 * bus, is in the disconnected state, or we're hoping to find 2158 * a command for the same target active on the bus to abuse to 2159 * send a BDR. Queue the appropriate message based on which of 2160 * these states we are in. 2161 */ 2162 last_phase = ahc_inb(ahc, LASTPHASE); 2163 saved_scbptr = ahc_inb(ahc, SCBPTR); 2164 active_scb_index = ahc_inb(ahc, SCB_TAG); 2165 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); 2166 if (last_phase != P_BUSFREE 2167 && (pending_scb->hscb->tag == active_scb_index 2168 || (flag == SCB_DEVICE_RESET 2169 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) { 2170 2171 /* 2172 * We're active on the bus, so assert ATN 2173 * and hope that the target responds. 2174 */ 2175 pending_scb = ahc_lookup_scb(ahc, active_scb_index); 2176 pending_scb->flags |= SCB_RECOVERY_SCB|flag; 2177 ahc_outb(ahc, MSG_OUT, HOST_MSG); 2178 ahc_outb(ahc, SCSISIGO, last_phase|ATNO); 2179 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2180 wait = TRUE; 2181 } else if (disconnected) { 2182 2183 /* 2184 * Actually re-queue this SCB in an attempt 2185 * to select the device before it reconnects. 2186 * In either case (selection or reselection), 2187 * we will now issue the approprate message 2188 * to the timed-out device. 2189 * 2190 * Set the MK_MESSAGE control bit indicating 2191 * that we desire to send a message. We 2192 * also set the disconnected flag since 2193 * in the paging case there is no guarantee 2194 * that our SCB control byte matches the 2195 * version on the card. We don't want the 2196 * sequencer to abort the command thinking 2197 * an unsolicited reselection occurred. 2198 */ 2199 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2200 pending_scb->flags |= SCB_RECOVERY_SCB|flag; 2201 2202 /* 2203 * Remove any cached copy of this SCB in the 2204 * disconnected list in preparation for the 2205 * queuing of our abort SCB. We use the 2206 * same element in the SCB, SCB_NEXT, for 2207 * both the qinfifo and the disconnected list. 2208 */ 2209 ahc_search_disc_list(ahc, cmd->device->id, 2210 cmd->device->channel + 'A', 2211 cmd->device->lun, pending_scb->hscb->tag, 2212 /*stop_on_first*/TRUE, 2213 /*remove*/TRUE, 2214 /*save_state*/FALSE); 2215 2216 /* 2217 * In the non-paging case, the sequencer will 2218 * never re-reference the in-core SCB. 2219 * To make sure we are notified during 2220 * reslection, set the MK_MESSAGE flag in 2221 * the card's copy of the SCB. 2222 */ 2223 if ((ahc->flags & AHC_PAGESCBS) == 0) { 2224 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag); 2225 ahc_outb(ahc, SCB_CONTROL, 2226 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE); 2227 } 2228 2229 /* 2230 * Clear out any entries in the QINFIFO first 2231 * so we are the next SCB for this target 2232 * to run. 2233 */ 2234 ahc_search_qinfifo(ahc, cmd->device->id, 2235 cmd->device->channel + 'A', 2236 cmd->device->lun, SCB_LIST_NULL, 2237 ROLE_INITIATOR, CAM_REQUEUE_REQ, 2238 SEARCH_COMPLETE); 2239 ahc_qinfifo_requeue_tail(ahc, pending_scb); 2240 ahc_outb(ahc, SCBPTR, saved_scbptr); 2241 ahc_print_path(ahc, pending_scb); 2242 printf("Device is disconnected, re-queuing SCB\n"); 2243 wait = TRUE; 2244 } else { 2245 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2246 retval = FAILED; 2247 goto done; 2248 } 2249 2250 no_cmd: 2251 /* 2252 * Our assumption is that if we don't have the command, no 2253 * recovery action was required, so we return success. Again, 2254 * the semantics of the mid-layer recovery engine are not 2255 * well defined, so this may change in time. 2256 */ 2257 retval = SUCCESS; 2258 done: 2259 if (paused) 2260 ahc_unpause(ahc); 2261 if (wait) { 2262 DECLARE_COMPLETION_ONSTACK(done); 2263 2264 ahc->platform_data->eh_done = &done; 2265 ahc_unlock(ahc, &flags); 2266 2267 printf("Recovery code sleeping\n"); 2268 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2269 ahc_lock(ahc, &flags); 2270 ahc->platform_data->eh_done = NULL; 2271 ahc_unlock(ahc, &flags); 2272 2273 printf("Timer Expired\n"); 2274 retval = FAILED; 2275 } 2276 printf("Recovery code awake\n"); 2277 } else 2278 ahc_unlock(ahc, &flags); 2279 return (retval); 2280 } 2281 2282 void 2283 ahc_platform_dump_card_state(struct ahc_softc *ahc) 2284 { 2285 } 2286 2287 static void ahc_linux_set_width(struct scsi_target *starget, int width) 2288 { 2289 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2290 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2291 struct ahc_devinfo devinfo; 2292 unsigned long flags; 2293 2294 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2295 starget->channel + 'A', ROLE_INITIATOR); 2296 ahc_lock(ahc, &flags); 2297 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE); 2298 ahc_unlock(ahc, &flags); 2299 } 2300 2301 static void ahc_linux_set_period(struct scsi_target *starget, int period) 2302 { 2303 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2304 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2305 struct ahc_tmode_tstate *tstate; 2306 struct ahc_initiator_tinfo *tinfo 2307 = ahc_fetch_transinfo(ahc, 2308 starget->channel + 'A', 2309 shost->this_id, starget->id, &tstate); 2310 struct ahc_devinfo devinfo; 2311 unsigned int ppr_options = tinfo->goal.ppr_options; 2312 unsigned long flags; 2313 unsigned long offset = tinfo->goal.offset; 2314 struct ahc_syncrate *syncrate; 2315 2316 if (offset == 0) 2317 offset = MAX_OFFSET; 2318 2319 if (period < 9) 2320 period = 9; /* 12.5ns is our minimum */ 2321 if (period == 9) { 2322 if (spi_max_width(starget)) 2323 ppr_options |= MSG_EXT_PPR_DT_REQ; 2324 else 2325 /* need wide for DT and need DT for 12.5 ns */ 2326 period = 10; 2327 } 2328 2329 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2330 starget->channel + 'A', ROLE_INITIATOR); 2331 2332 /* all PPR requests apart from QAS require wide transfers */ 2333 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2334 if (spi_width(starget) == 0) 2335 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2336 } 2337 2338 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2339 ahc_lock(ahc, &flags); 2340 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2341 ppr_options, AHC_TRANS_GOAL, FALSE); 2342 ahc_unlock(ahc, &flags); 2343 } 2344 2345 static void ahc_linux_set_offset(struct scsi_target *starget, int offset) 2346 { 2347 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2348 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2349 struct ahc_tmode_tstate *tstate; 2350 struct ahc_initiator_tinfo *tinfo 2351 = ahc_fetch_transinfo(ahc, 2352 starget->channel + 'A', 2353 shost->this_id, starget->id, &tstate); 2354 struct ahc_devinfo devinfo; 2355 unsigned int ppr_options = 0; 2356 unsigned int period = 0; 2357 unsigned long flags; 2358 struct ahc_syncrate *syncrate = NULL; 2359 2360 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2361 starget->channel + 'A', ROLE_INITIATOR); 2362 if (offset != 0) { 2363 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2364 period = tinfo->goal.period; 2365 ppr_options = tinfo->goal.ppr_options; 2366 } 2367 ahc_lock(ahc, &flags); 2368 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2369 ppr_options, AHC_TRANS_GOAL, FALSE); 2370 ahc_unlock(ahc, &flags); 2371 } 2372 2373 static void ahc_linux_set_dt(struct scsi_target *starget, int dt) 2374 { 2375 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2376 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2377 struct ahc_tmode_tstate *tstate; 2378 struct ahc_initiator_tinfo *tinfo 2379 = ahc_fetch_transinfo(ahc, 2380 starget->channel + 'A', 2381 shost->this_id, starget->id, &tstate); 2382 struct ahc_devinfo devinfo; 2383 unsigned int ppr_options = tinfo->goal.ppr_options 2384 & ~MSG_EXT_PPR_DT_REQ; 2385 unsigned int period = tinfo->goal.period; 2386 unsigned int width = tinfo->goal.width; 2387 unsigned long flags; 2388 struct ahc_syncrate *syncrate; 2389 2390 if (dt && spi_max_width(starget)) { 2391 ppr_options |= MSG_EXT_PPR_DT_REQ; 2392 if (!width) 2393 ahc_linux_set_width(starget, 1); 2394 } else if (period == 9) 2395 period = 10; /* if resetting DT, period must be >= 25ns */ 2396 2397 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2398 starget->channel + 'A', ROLE_INITIATOR); 2399 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT); 2400 ahc_lock(ahc, &flags); 2401 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2402 ppr_options, AHC_TRANS_GOAL, FALSE); 2403 ahc_unlock(ahc, &flags); 2404 } 2405 2406 #if 0 2407 /* FIXME: This code claims to support IU and QAS. However, the actual 2408 * sequencer code and aic7xxx_core have no support for these parameters and 2409 * will get into a bad state if they're negotiated. Do not enable this 2410 * unless you know what you're doing */ 2411 static void ahc_linux_set_qas(struct scsi_target *starget, int qas) 2412 { 2413 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2414 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2415 struct ahc_tmode_tstate *tstate; 2416 struct ahc_initiator_tinfo *tinfo 2417 = ahc_fetch_transinfo(ahc, 2418 starget->channel + 'A', 2419 shost->this_id, starget->id, &tstate); 2420 struct ahc_devinfo devinfo; 2421 unsigned int ppr_options = tinfo->goal.ppr_options 2422 & ~MSG_EXT_PPR_QAS_REQ; 2423 unsigned int period = tinfo->goal.period; 2424 unsigned long flags; 2425 struct ahc_syncrate *syncrate; 2426 2427 if (qas) 2428 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2429 2430 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2431 starget->channel + 'A', ROLE_INITIATOR); 2432 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2433 ahc_lock(ahc, &flags); 2434 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2435 ppr_options, AHC_TRANS_GOAL, FALSE); 2436 ahc_unlock(ahc, &flags); 2437 } 2438 2439 static void ahc_linux_set_iu(struct scsi_target *starget, int iu) 2440 { 2441 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2442 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2443 struct ahc_tmode_tstate *tstate; 2444 struct ahc_initiator_tinfo *tinfo 2445 = ahc_fetch_transinfo(ahc, 2446 starget->channel + 'A', 2447 shost->this_id, starget->id, &tstate); 2448 struct ahc_devinfo devinfo; 2449 unsigned int ppr_options = tinfo->goal.ppr_options 2450 & ~MSG_EXT_PPR_IU_REQ; 2451 unsigned int period = tinfo->goal.period; 2452 unsigned long flags; 2453 struct ahc_syncrate *syncrate; 2454 2455 if (iu) 2456 ppr_options |= MSG_EXT_PPR_IU_REQ; 2457 2458 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2459 starget->channel + 'A', ROLE_INITIATOR); 2460 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2461 ahc_lock(ahc, &flags); 2462 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2463 ppr_options, AHC_TRANS_GOAL, FALSE); 2464 ahc_unlock(ahc, &flags); 2465 } 2466 #endif 2467 2468 static void ahc_linux_get_signalling(struct Scsi_Host *shost) 2469 { 2470 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata; 2471 unsigned long flags; 2472 u8 mode; 2473 2474 if (!(ahc->features & AHC_ULTRA2)) { 2475 /* non-LVD chipset, may not have SBLKCTL reg */ 2476 spi_signalling(shost) = 2477 ahc->features & AHC_HVD ? 2478 SPI_SIGNAL_HVD : 2479 SPI_SIGNAL_SE; 2480 return; 2481 } 2482 2483 ahc_lock(ahc, &flags); 2484 ahc_pause(ahc); 2485 mode = ahc_inb(ahc, SBLKCTL); 2486 ahc_unpause(ahc); 2487 ahc_unlock(ahc, &flags); 2488 2489 if (mode & ENAB40) 2490 spi_signalling(shost) = SPI_SIGNAL_LVD; 2491 else if (mode & ENAB20) 2492 spi_signalling(shost) = SPI_SIGNAL_SE; 2493 else 2494 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2495 } 2496 2497 static struct spi_function_template ahc_linux_transport_functions = { 2498 .set_offset = ahc_linux_set_offset, 2499 .show_offset = 1, 2500 .set_period = ahc_linux_set_period, 2501 .show_period = 1, 2502 .set_width = ahc_linux_set_width, 2503 .show_width = 1, 2504 .set_dt = ahc_linux_set_dt, 2505 .show_dt = 1, 2506 #if 0 2507 .set_iu = ahc_linux_set_iu, 2508 .show_iu = 1, 2509 .set_qas = ahc_linux_set_qas, 2510 .show_qas = 1, 2511 #endif 2512 .get_signalling = ahc_linux_get_signalling, 2513 }; 2514 2515 2516 2517 static int __init 2518 ahc_linux_init(void) 2519 { 2520 /* 2521 * If we've been passed any parameters, process them now. 2522 */ 2523 if (aic7xxx) 2524 aic7xxx_setup(aic7xxx); 2525 2526 ahc_linux_transport_template = 2527 spi_attach_transport(&ahc_linux_transport_functions); 2528 if (!ahc_linux_transport_template) 2529 return -ENODEV; 2530 2531 scsi_transport_reserve_device(ahc_linux_transport_template, 2532 sizeof(struct ahc_linux_device)); 2533 2534 ahc_linux_pci_init(); 2535 ahc_linux_eisa_init(); 2536 return 0; 2537 } 2538 2539 static void 2540 ahc_linux_exit(void) 2541 { 2542 ahc_linux_pci_exit(); 2543 ahc_linux_eisa_exit(); 2544 spi_release_transport(ahc_linux_transport_template); 2545 } 2546 2547 module_init(ahc_linux_init); 2548 module_exit(ahc_linux_exit); 2549