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 if (cmd->use_sg != 0) { 406 struct scatterlist *sg; 407 408 sg = (struct scatterlist *)cmd->request_buffer; 409 pci_unmap_sg(ahc->dev_softc, sg, cmd->use_sg, 410 cmd->sc_data_direction); 411 } else if (cmd->request_bufflen != 0) { 412 pci_unmap_single(ahc->dev_softc, 413 scb->platform_data->buf_busaddr, 414 cmd->request_bufflen, 415 cmd->sc_data_direction); 416 } 417 } 418 419 static __inline int 420 ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, 421 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len) 422 { 423 int consumed; 424 425 if ((scb->sg_count + 1) > AHC_NSEG) 426 panic("Too few segs for dma mapping. " 427 "Increase AHC_NSEG\n"); 428 429 consumed = 1; 430 sg->addr = ahc_htole32(addr & 0xFFFFFFFF); 431 scb->platform_data->xfer_len += len; 432 433 if (sizeof(dma_addr_t) > 4 434 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0) 435 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK; 436 437 sg->len = ahc_htole32(len); 438 return (consumed); 439 } 440 441 /* 442 * Return a string describing the driver. 443 */ 444 static const char * 445 ahc_linux_info(struct Scsi_Host *host) 446 { 447 static char buffer[512]; 448 char ahc_info[256]; 449 char *bp; 450 struct ahc_softc *ahc; 451 452 bp = &buffer[0]; 453 ahc = *(struct ahc_softc **)host->hostdata; 454 memset(bp, 0, sizeof(buffer)); 455 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev "); 456 strcat(bp, AIC7XXX_DRIVER_VERSION); 457 strcat(bp, "\n"); 458 strcat(bp, " <"); 459 strcat(bp, ahc->description); 460 strcat(bp, ">\n"); 461 strcat(bp, " "); 462 ahc_controller_info(ahc, ahc_info); 463 strcat(bp, ahc_info); 464 strcat(bp, "\n"); 465 466 return (bp); 467 } 468 469 /* 470 * Queue an SCB to the controller. 471 */ 472 static int 473 ahc_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *)) 474 { 475 struct ahc_softc *ahc; 476 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device); 477 int rtn = SCSI_MLQUEUE_HOST_BUSY; 478 unsigned long flags; 479 480 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 481 482 ahc_lock(ahc, &flags); 483 if (ahc->platform_data->qfrozen == 0) { 484 cmd->scsi_done = scsi_done; 485 cmd->result = CAM_REQ_INPROG << 16; 486 rtn = ahc_linux_run_command(ahc, dev, cmd); 487 } 488 ahc_unlock(ahc, &flags); 489 490 return rtn; 491 } 492 493 static inline struct scsi_target ** 494 ahc_linux_target_in_softc(struct scsi_target *starget) 495 { 496 struct ahc_softc *ahc = 497 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); 498 unsigned int target_offset; 499 500 target_offset = starget->id; 501 if (starget->channel != 0) 502 target_offset += 8; 503 504 return &ahc->platform_data->starget[target_offset]; 505 } 506 507 static int 508 ahc_linux_target_alloc(struct scsi_target *starget) 509 { 510 struct ahc_softc *ahc = 511 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); 512 struct seeprom_config *sc = ahc->seep_config; 513 unsigned long flags; 514 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); 515 unsigned short scsirate; 516 struct ahc_devinfo devinfo; 517 struct ahc_initiator_tinfo *tinfo; 518 struct ahc_tmode_tstate *tstate; 519 char channel = starget->channel + 'A'; 520 unsigned int our_id = ahc->our_id; 521 unsigned int target_offset; 522 523 target_offset = starget->id; 524 if (starget->channel != 0) 525 target_offset += 8; 526 527 if (starget->channel) 528 our_id = ahc->our_id_b; 529 530 ahc_lock(ahc, &flags); 531 532 BUG_ON(*ahc_targp != NULL); 533 534 *ahc_targp = starget; 535 536 if (sc) { 537 int maxsync = AHC_SYNCRATE_DT; 538 int ultra = 0; 539 int flags = sc->device_flags[target_offset]; 540 541 if (ahc->flags & AHC_NEWEEPROM_FMT) { 542 if (flags & CFSYNCHISULTRA) 543 ultra = 1; 544 } else if (flags & CFULTRAEN) 545 ultra = 1; 546 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04 547 * change it to ultra=0, CFXFER = 0 */ 548 if(ultra && (flags & CFXFER) == 0x04) { 549 ultra = 0; 550 flags &= ~CFXFER; 551 } 552 553 if ((ahc->features & AHC_ULTRA2) != 0) { 554 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0); 555 } else { 556 scsirate = (flags & CFXFER) << 4; 557 maxsync = ultra ? AHC_SYNCRATE_ULTRA : 558 AHC_SYNCRATE_FAST; 559 } 560 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; 561 if (!(flags & CFSYNCH)) 562 spi_max_offset(starget) = 0; 563 spi_min_period(starget) = 564 ahc_find_period(ahc, scsirate, maxsync); 565 566 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id, 567 starget->id, &tstate); 568 } 569 ahc_compile_devinfo(&devinfo, our_id, starget->id, 570 CAM_LUN_WILDCARD, channel, 571 ROLE_INITIATOR); 572 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0, 573 AHC_TRANS_GOAL, /*paused*/FALSE); 574 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 575 AHC_TRANS_GOAL, /*paused*/FALSE); 576 ahc_unlock(ahc, &flags); 577 578 return 0; 579 } 580 581 static void 582 ahc_linux_target_destroy(struct scsi_target *starget) 583 { 584 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); 585 586 *ahc_targp = NULL; 587 } 588 589 static int 590 ahc_linux_slave_alloc(struct scsi_device *sdev) 591 { 592 struct ahc_softc *ahc = 593 *((struct ahc_softc **)sdev->host->hostdata); 594 struct scsi_target *starget = sdev->sdev_target; 595 struct ahc_linux_device *dev; 596 597 if (bootverbose) 598 printf("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id); 599 600 dev = scsi_transport_device_data(sdev); 601 memset(dev, 0, sizeof(*dev)); 602 603 /* 604 * We start out life using untagged 605 * transactions of which we allow one. 606 */ 607 dev->openings = 1; 608 609 /* 610 * Set maxtags to 0. This will be changed if we 611 * later determine that we are dealing with 612 * a tagged queuing capable device. 613 */ 614 dev->maxtags = 0; 615 616 spi_period(starget) = 0; 617 618 return 0; 619 } 620 621 static int 622 ahc_linux_slave_configure(struct scsi_device *sdev) 623 { 624 struct ahc_softc *ahc; 625 626 ahc = *((struct ahc_softc **)sdev->host->hostdata); 627 628 if (bootverbose) 629 sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); 630 631 ahc_linux_device_queue_depth(sdev); 632 633 /* Initial Domain Validation */ 634 if (!spi_initial_dv(sdev->sdev_target)) 635 spi_dv_device(sdev); 636 637 return 0; 638 } 639 640 #if defined(__i386__) 641 /* 642 * Return the disk geometry for the given SCSI device. 643 */ 644 static int 645 ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 646 sector_t capacity, int geom[]) 647 { 648 uint8_t *bh; 649 int heads; 650 int sectors; 651 int cylinders; 652 int ret; 653 int extended; 654 struct ahc_softc *ahc; 655 u_int channel; 656 657 ahc = *((struct ahc_softc **)sdev->host->hostdata); 658 channel = sdev_channel(sdev); 659 660 bh = scsi_bios_ptable(bdev); 661 if (bh) { 662 ret = scsi_partsize(bh, capacity, 663 &geom[2], &geom[0], &geom[1]); 664 kfree(bh); 665 if (ret != -1) 666 return (ret); 667 } 668 heads = 64; 669 sectors = 32; 670 cylinders = aic_sector_div(capacity, heads, sectors); 671 672 if (aic7xxx_extended != 0) 673 extended = 1; 674 else if (channel == 0) 675 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0; 676 else 677 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0; 678 if (extended && cylinders >= 1024) { 679 heads = 255; 680 sectors = 63; 681 cylinders = aic_sector_div(capacity, heads, sectors); 682 } 683 geom[0] = heads; 684 geom[1] = sectors; 685 geom[2] = cylinders; 686 return (0); 687 } 688 #endif 689 690 /* 691 * Abort the current SCSI command(s). 692 */ 693 static int 694 ahc_linux_abort(struct scsi_cmnd *cmd) 695 { 696 int error; 697 698 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT); 699 if (error != 0) 700 printf("aic7xxx_abort returns 0x%x\n", error); 701 return (error); 702 } 703 704 /* 705 * Attempt to send a target reset message to the device that timed out. 706 */ 707 static int 708 ahc_linux_dev_reset(struct scsi_cmnd *cmd) 709 { 710 int error; 711 712 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET); 713 if (error != 0) 714 printf("aic7xxx_dev_reset returns 0x%x\n", error); 715 return (error); 716 } 717 718 /* 719 * Reset the SCSI bus. 720 */ 721 static int 722 ahc_linux_bus_reset(struct scsi_cmnd *cmd) 723 { 724 struct ahc_softc *ahc; 725 int found; 726 unsigned long flags; 727 728 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 729 730 ahc_lock(ahc, &flags); 731 found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A', 732 /*initiate reset*/TRUE); 733 ahc_unlock(ahc, &flags); 734 735 if (bootverbose) 736 printf("%s: SCSI bus reset delivered. " 737 "%d SCBs aborted.\n", ahc_name(ahc), found); 738 739 return SUCCESS; 740 } 741 742 struct scsi_host_template aic7xxx_driver_template = { 743 .module = THIS_MODULE, 744 .name = "aic7xxx", 745 .proc_name = "aic7xxx", 746 .proc_info = ahc_linux_proc_info, 747 .info = ahc_linux_info, 748 .queuecommand = ahc_linux_queue, 749 .eh_abort_handler = ahc_linux_abort, 750 .eh_device_reset_handler = ahc_linux_dev_reset, 751 .eh_bus_reset_handler = ahc_linux_bus_reset, 752 #if defined(__i386__) 753 .bios_param = ahc_linux_biosparam, 754 #endif 755 .can_queue = AHC_MAX_QUEUE, 756 .this_id = -1, 757 .max_sectors = 8192, 758 .cmd_per_lun = 2, 759 .use_clustering = ENABLE_CLUSTERING, 760 .slave_alloc = ahc_linux_slave_alloc, 761 .slave_configure = ahc_linux_slave_configure, 762 .target_alloc = ahc_linux_target_alloc, 763 .target_destroy = ahc_linux_target_destroy, 764 }; 765 766 /**************************** Tasklet Handler *********************************/ 767 768 /******************************** Macros **************************************/ 769 #define BUILD_SCSIID(ahc, cmd) \ 770 ((((cmd)->device->id << TID_SHIFT) & TID) \ 771 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \ 772 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB)) 773 774 /******************************** Bus DMA *************************************/ 775 int 776 ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent, 777 bus_size_t alignment, bus_size_t boundary, 778 dma_addr_t lowaddr, dma_addr_t highaddr, 779 bus_dma_filter_t *filter, void *filterarg, 780 bus_size_t maxsize, int nsegments, 781 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 782 { 783 bus_dma_tag_t dmat; 784 785 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT); 786 if (dmat == NULL) 787 return (ENOMEM); 788 789 /* 790 * Linux is very simplistic about DMA memory. For now don't 791 * maintain all specification information. Once Linux supplies 792 * better facilities for doing these operations, or the 793 * needs of this particular driver change, we might need to do 794 * more here. 795 */ 796 dmat->alignment = alignment; 797 dmat->boundary = boundary; 798 dmat->maxsize = maxsize; 799 *ret_tag = dmat; 800 return (0); 801 } 802 803 void 804 ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat) 805 { 806 free(dmat, M_DEVBUF); 807 } 808 809 int 810 ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr, 811 int flags, bus_dmamap_t *mapp) 812 { 813 *vaddr = pci_alloc_consistent(ahc->dev_softc, 814 dmat->maxsize, mapp); 815 if (*vaddr == NULL) 816 return ENOMEM; 817 return 0; 818 } 819 820 void 821 ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat, 822 void* vaddr, bus_dmamap_t map) 823 { 824 pci_free_consistent(ahc->dev_softc, dmat->maxsize, 825 vaddr, map); 826 } 827 828 int 829 ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map, 830 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 831 void *cb_arg, int flags) 832 { 833 /* 834 * Assume for now that this will only be used during 835 * initialization and not for per-transaction buffer mapping. 836 */ 837 bus_dma_segment_t stack_sg; 838 839 stack_sg.ds_addr = map; 840 stack_sg.ds_len = dmat->maxsize; 841 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 842 return (0); 843 } 844 845 void 846 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 847 { 848 } 849 850 int 851 ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 852 { 853 /* Nothing to do */ 854 return (0); 855 } 856 857 static void 858 ahc_linux_setup_tag_info_global(char *p) 859 { 860 int tags, i, j; 861 862 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 863 printf("Setting Global Tags= %d\n", tags); 864 865 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) { 866 for (j = 0; j < AHC_NUM_TARGETS; j++) { 867 aic7xxx_tag_info[i].tag_commands[j] = tags; 868 } 869 } 870 } 871 872 static void 873 ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 874 { 875 876 if ((instance >= 0) && (targ >= 0) 877 && (instance < ARRAY_SIZE(aic7xxx_tag_info)) 878 && (targ < AHC_NUM_TARGETS)) { 879 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff; 880 if (bootverbose) 881 printf("tag_info[%d:%d] = %d\n", instance, targ, value); 882 } 883 } 884 885 static char * 886 ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 887 void (*callback)(u_long, int, int, int32_t), 888 u_long callback_arg) 889 { 890 char *tok_end; 891 char *tok_end2; 892 int i; 893 int instance; 894 int targ; 895 int done; 896 char tok_list[] = {'.', ',', '{', '}', '\0'}; 897 898 /* All options use a ':' name/arg separator */ 899 if (*opt_arg != ':') 900 return (opt_arg); 901 opt_arg++; 902 instance = -1; 903 targ = -1; 904 done = FALSE; 905 /* 906 * Restore separator that may be in 907 * the middle of our option argument. 908 */ 909 tok_end = strchr(opt_arg, '\0'); 910 if (tok_end < end) 911 *tok_end = ','; 912 while (!done) { 913 switch (*opt_arg) { 914 case '{': 915 if (instance == -1) { 916 instance = 0; 917 } else { 918 if (depth > 1) { 919 if (targ == -1) 920 targ = 0; 921 } else { 922 printf("Malformed Option %s\n", 923 opt_name); 924 done = TRUE; 925 } 926 } 927 opt_arg++; 928 break; 929 case '}': 930 if (targ != -1) 931 targ = -1; 932 else if (instance != -1) 933 instance = -1; 934 opt_arg++; 935 break; 936 case ',': 937 case '.': 938 if (instance == -1) 939 done = TRUE; 940 else if (targ >= 0) 941 targ++; 942 else if (instance >= 0) 943 instance++; 944 opt_arg++; 945 break; 946 case '\0': 947 done = TRUE; 948 break; 949 default: 950 tok_end = end; 951 for (i = 0; tok_list[i]; i++) { 952 tok_end2 = strchr(opt_arg, tok_list[i]); 953 if ((tok_end2) && (tok_end2 < tok_end)) 954 tok_end = tok_end2; 955 } 956 callback(callback_arg, instance, targ, 957 simple_strtol(opt_arg, NULL, 0)); 958 opt_arg = tok_end; 959 break; 960 } 961 } 962 return (opt_arg); 963 } 964 965 /* 966 * Handle Linux boot parameters. This routine allows for assigning a value 967 * to a parameter with a ':' between the parameter and the value. 968 * ie. aic7xxx=stpwlev:1,extended 969 */ 970 static int 971 aic7xxx_setup(char *s) 972 { 973 int i, n; 974 char *p; 975 char *end; 976 977 static struct { 978 const char *name; 979 uint32_t *flag; 980 } options[] = { 981 { "extended", &aic7xxx_extended }, 982 { "no_reset", &aic7xxx_no_reset }, 983 { "verbose", &aic7xxx_verbose }, 984 { "allow_memio", &aic7xxx_allow_memio}, 985 #ifdef AHC_DEBUG 986 { "debug", &ahc_debug }, 987 #endif 988 { "periodic_otag", &aic7xxx_periodic_otag }, 989 { "pci_parity", &aic7xxx_pci_parity }, 990 { "seltime", &aic7xxx_seltime }, 991 { "tag_info", NULL }, 992 { "global_tag_depth", NULL }, 993 { "dv", NULL } 994 }; 995 996 end = strchr(s, '\0'); 997 998 /* 999 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE 1000 * will never be 0 in this case. 1001 */ 1002 n = 0; 1003 1004 while ((p = strsep(&s, ",.")) != NULL) { 1005 if (*p == '\0') 1006 continue; 1007 for (i = 0; i < ARRAY_SIZE(options); i++) { 1008 1009 n = strlen(options[i].name); 1010 if (strncmp(options[i].name, p, n) == 0) 1011 break; 1012 } 1013 if (i == ARRAY_SIZE(options)) 1014 continue; 1015 1016 if (strncmp(p, "global_tag_depth", n) == 0) { 1017 ahc_linux_setup_tag_info_global(p + n); 1018 } else if (strncmp(p, "tag_info", n) == 0) { 1019 s = ahc_parse_brace_option("tag_info", p + n, end, 1020 2, ahc_linux_setup_tag_info, 0); 1021 } else if (p[n] == ':') { 1022 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1023 } else if (strncmp(p, "verbose", n) == 0) { 1024 *(options[i].flag) = 1; 1025 } else { 1026 *(options[i].flag) ^= 0xFFFFFFFF; 1027 } 1028 } 1029 return 1; 1030 } 1031 1032 __setup("aic7xxx=", aic7xxx_setup); 1033 1034 uint32_t aic7xxx_verbose; 1035 1036 int 1037 ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template) 1038 { 1039 char buf[80]; 1040 struct Scsi_Host *host; 1041 char *new_name; 1042 u_long s; 1043 int retval; 1044 1045 template->name = ahc->description; 1046 host = scsi_host_alloc(template, sizeof(struct ahc_softc *)); 1047 if (host == NULL) 1048 return (ENOMEM); 1049 1050 *((struct ahc_softc **)host->hostdata) = ahc; 1051 ahc->platform_data->host = host; 1052 host->can_queue = AHC_MAX_QUEUE; 1053 host->cmd_per_lun = 2; 1054 /* XXX No way to communicate the ID for multiple channels */ 1055 host->this_id = ahc->our_id; 1056 host->irq = ahc->platform_data->irq; 1057 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8; 1058 host->max_lun = AHC_NUM_LUNS; 1059 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0; 1060 host->sg_tablesize = AHC_NSEG; 1061 ahc_lock(ahc, &s); 1062 ahc_set_unit(ahc, ahc_linux_unit++); 1063 ahc_unlock(ahc, &s); 1064 sprintf(buf, "scsi%d", host->host_no); 1065 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); 1066 if (new_name != NULL) { 1067 strcpy(new_name, buf); 1068 ahc_set_name(ahc, new_name); 1069 } 1070 host->unique_id = ahc->unit; 1071 ahc_linux_initialize_scsi_bus(ahc); 1072 ahc_intr_enable(ahc, TRUE); 1073 1074 host->transportt = ahc_linux_transport_template; 1075 1076 retval = scsi_add_host(host, 1077 (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); 1078 if (retval) { 1079 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n"); 1080 scsi_host_put(host); 1081 return retval; 1082 } 1083 1084 scsi_scan_host(host); 1085 return 0; 1086 } 1087 1088 /* 1089 * Place the SCSI bus into a known state by either resetting it, 1090 * or forcing transfer negotiations on the next command to any 1091 * target. 1092 */ 1093 void 1094 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc) 1095 { 1096 int i; 1097 int numtarg; 1098 unsigned long s; 1099 1100 i = 0; 1101 numtarg = 0; 1102 1103 ahc_lock(ahc, &s); 1104 1105 if (aic7xxx_no_reset != 0) 1106 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B); 1107 1108 if ((ahc->flags & AHC_RESET_BUS_A) != 0) 1109 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE); 1110 else 1111 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8; 1112 1113 if ((ahc->features & AHC_TWIN) != 0) { 1114 1115 if ((ahc->flags & AHC_RESET_BUS_B) != 0) { 1116 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE); 1117 } else { 1118 if (numtarg == 0) 1119 i = 8; 1120 numtarg += 8; 1121 } 1122 } 1123 1124 /* 1125 * Force negotiation to async for all targets that 1126 * will not see an initial bus reset. 1127 */ 1128 for (; i < numtarg; i++) { 1129 struct ahc_devinfo devinfo; 1130 struct ahc_initiator_tinfo *tinfo; 1131 struct ahc_tmode_tstate *tstate; 1132 u_int our_id; 1133 u_int target_id; 1134 char channel; 1135 1136 channel = 'A'; 1137 our_id = ahc->our_id; 1138 target_id = i; 1139 if (i > 7 && (ahc->features & AHC_TWIN) != 0) { 1140 channel = 'B'; 1141 our_id = ahc->our_id_b; 1142 target_id = i % 8; 1143 } 1144 tinfo = ahc_fetch_transinfo(ahc, channel, our_id, 1145 target_id, &tstate); 1146 ahc_compile_devinfo(&devinfo, our_id, target_id, 1147 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR); 1148 ahc_update_neg_request(ahc, &devinfo, tstate, 1149 tinfo, AHC_NEG_ALWAYS); 1150 } 1151 ahc_unlock(ahc, &s); 1152 /* Give the bus some time to recover */ 1153 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) { 1154 ahc_linux_freeze_simq(ahc); 1155 msleep(AIC7XXX_RESET_DELAY); 1156 ahc_linux_release_simq(ahc); 1157 } 1158 } 1159 1160 int 1161 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg) 1162 { 1163 1164 ahc->platform_data = 1165 malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT); 1166 if (ahc->platform_data == NULL) 1167 return (ENOMEM); 1168 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data)); 1169 ahc->platform_data->irq = AHC_LINUX_NOIRQ; 1170 ahc_lockinit(ahc); 1171 ahc->seltime = (aic7xxx_seltime & 0x3) << 4; 1172 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4; 1173 if (aic7xxx_pci_parity == 0) 1174 ahc->flags |= AHC_DISABLE_PCI_PERR; 1175 1176 return (0); 1177 } 1178 1179 void 1180 ahc_platform_free(struct ahc_softc *ahc) 1181 { 1182 struct scsi_target *starget; 1183 int i; 1184 1185 if (ahc->platform_data != NULL) { 1186 /* destroy all of the device and target objects */ 1187 for (i = 0; i < AHC_NUM_TARGETS; i++) { 1188 starget = ahc->platform_data->starget[i]; 1189 if (starget != NULL) { 1190 ahc->platform_data->starget[i] = NULL; 1191 } 1192 } 1193 1194 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ) 1195 free_irq(ahc->platform_data->irq, ahc); 1196 if (ahc->tag == BUS_SPACE_PIO 1197 && ahc->bsh.ioport != 0) 1198 release_region(ahc->bsh.ioport, 256); 1199 if (ahc->tag == BUS_SPACE_MEMIO 1200 && ahc->bsh.maddr != NULL) { 1201 iounmap(ahc->bsh.maddr); 1202 release_mem_region(ahc->platform_data->mem_busaddr, 1203 0x1000); 1204 } 1205 1206 if (ahc->platform_data->host) 1207 scsi_host_put(ahc->platform_data->host); 1208 1209 free(ahc->platform_data, M_DEVBUF); 1210 } 1211 } 1212 1213 void 1214 ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb) 1215 { 1216 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb), 1217 SCB_GET_CHANNEL(ahc, scb), 1218 SCB_GET_LUN(scb), SCB_LIST_NULL, 1219 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1220 } 1221 1222 void 1223 ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev, 1224 struct ahc_devinfo *devinfo, ahc_queue_alg alg) 1225 { 1226 struct ahc_linux_device *dev; 1227 int was_queuing; 1228 int now_queuing; 1229 1230 if (sdev == NULL) 1231 return; 1232 dev = scsi_transport_device_data(sdev); 1233 1234 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED); 1235 switch (alg) { 1236 default: 1237 case AHC_QUEUE_NONE: 1238 now_queuing = 0; 1239 break; 1240 case AHC_QUEUE_BASIC: 1241 now_queuing = AHC_DEV_Q_BASIC; 1242 break; 1243 case AHC_QUEUE_TAGGED: 1244 now_queuing = AHC_DEV_Q_TAGGED; 1245 break; 1246 } 1247 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0 1248 && (was_queuing != now_queuing) 1249 && (dev->active != 0)) { 1250 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY; 1251 dev->qfrozen++; 1252 } 1253 1254 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG); 1255 if (now_queuing) { 1256 u_int usertags; 1257 1258 usertags = ahc_linux_user_tagdepth(ahc, devinfo); 1259 if (!was_queuing) { 1260 /* 1261 * Start out agressively and allow our 1262 * dynamic queue depth algorithm to take 1263 * care of the rest. 1264 */ 1265 dev->maxtags = usertags; 1266 dev->openings = dev->maxtags - dev->active; 1267 } 1268 if (dev->maxtags == 0) { 1269 /* 1270 * Queueing is disabled by the user. 1271 */ 1272 dev->openings = 1; 1273 } else if (alg == AHC_QUEUE_TAGGED) { 1274 dev->flags |= AHC_DEV_Q_TAGGED; 1275 if (aic7xxx_periodic_otag != 0) 1276 dev->flags |= AHC_DEV_PERIODIC_OTAG; 1277 } else 1278 dev->flags |= AHC_DEV_Q_BASIC; 1279 } else { 1280 /* We can only have one opening. */ 1281 dev->maxtags = 0; 1282 dev->openings = 1 - dev->active; 1283 } 1284 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) { 1285 case AHC_DEV_Q_BASIC: 1286 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); 1287 scsi_activate_tcq(sdev, dev->openings + dev->active); 1288 break; 1289 case AHC_DEV_Q_TAGGED: 1290 scsi_set_tag_type(sdev, MSG_ORDERED_TAG); 1291 scsi_activate_tcq(sdev, dev->openings + dev->active); 1292 break; 1293 default: 1294 /* 1295 * We allow the OS to queue 2 untagged transactions to 1296 * us at any time even though we can only execute them 1297 * serially on the controller/device. This should 1298 * remove some latency. 1299 */ 1300 scsi_deactivate_tcq(sdev, 2); 1301 break; 1302 } 1303 } 1304 1305 int 1306 ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel, 1307 int lun, u_int tag, role_t role, uint32_t status) 1308 { 1309 return 0; 1310 } 1311 1312 static u_int 1313 ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 1314 { 1315 static int warned_user; 1316 u_int tags; 1317 1318 tags = 0; 1319 if ((ahc->user_discenable & devinfo->target_mask) != 0) { 1320 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) { 1321 if (warned_user == 0) { 1322 1323 printf(KERN_WARNING 1324 "aic7xxx: WARNING: Insufficient tag_info instances\n" 1325 "aic7xxx: for installed controllers. Using defaults\n" 1326 "aic7xxx: Please update the aic7xxx_tag_info array in\n" 1327 "aic7xxx: the aic7xxx_osm..c source file.\n"); 1328 warned_user++; 1329 } 1330 tags = AHC_MAX_QUEUE; 1331 } else { 1332 adapter_tag_info_t *tag_info; 1333 1334 tag_info = &aic7xxx_tag_info[ahc->unit]; 1335 tags = tag_info->tag_commands[devinfo->target_offset]; 1336 if (tags > AHC_MAX_QUEUE) 1337 tags = AHC_MAX_QUEUE; 1338 } 1339 } 1340 return (tags); 1341 } 1342 1343 /* 1344 * Determines the queue depth for a given device. 1345 */ 1346 static void 1347 ahc_linux_device_queue_depth(struct scsi_device *sdev) 1348 { 1349 struct ahc_devinfo devinfo; 1350 u_int tags; 1351 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata); 1352 1353 ahc_compile_devinfo(&devinfo, 1354 sdev->sdev_target->channel == 0 1355 ? ahc->our_id : ahc->our_id_b, 1356 sdev->sdev_target->id, sdev->lun, 1357 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1358 ROLE_INITIATOR); 1359 tags = ahc_linux_user_tagdepth(ahc, &devinfo); 1360 if (tags != 0 && sdev->tagged_supported != 0) { 1361 1362 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED); 1363 ahc_send_async(ahc, devinfo.channel, devinfo.target, 1364 devinfo.lun, AC_TRANSFER_NEG); 1365 ahc_print_devinfo(ahc, &devinfo); 1366 printf("Tagged Queuing enabled. Depth %d\n", tags); 1367 } else { 1368 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE); 1369 ahc_send_async(ahc, devinfo.channel, devinfo.target, 1370 devinfo.lun, AC_TRANSFER_NEG); 1371 } 1372 } 1373 1374 static int 1375 ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev, 1376 struct scsi_cmnd *cmd) 1377 { 1378 struct scb *scb; 1379 struct hardware_scb *hscb; 1380 struct ahc_initiator_tinfo *tinfo; 1381 struct ahc_tmode_tstate *tstate; 1382 uint16_t mask; 1383 struct scb_tailq *untagged_q = NULL; 1384 1385 /* 1386 * Schedule us to run later. The only reason we are not 1387 * running is because the whole controller Q is frozen. 1388 */ 1389 if (ahc->platform_data->qfrozen != 0) 1390 return SCSI_MLQUEUE_HOST_BUSY; 1391 1392 /* 1393 * We only allow one untagged transaction 1394 * per target in the initiator role unless 1395 * we are storing a full busy target *lun* 1396 * table in SCB space. 1397 */ 1398 if (!blk_rq_tagged(cmd->request) 1399 && (ahc->features & AHC_SCB_BTT) == 0) { 1400 int target_offset; 1401 1402 target_offset = cmd->device->id + cmd->device->channel * 8; 1403 untagged_q = &(ahc->untagged_queues[target_offset]); 1404 if (!TAILQ_EMPTY(untagged_q)) 1405 /* if we're already executing an untagged command 1406 * we're busy to another */ 1407 return SCSI_MLQUEUE_DEVICE_BUSY; 1408 } 1409 1410 /* 1411 * Get an scb to use. 1412 */ 1413 scb = ahc_get_scb(ahc); 1414 if (!scb) 1415 return SCSI_MLQUEUE_HOST_BUSY; 1416 1417 scb->io_ctx = cmd; 1418 scb->platform_data->dev = dev; 1419 hscb = scb->hscb; 1420 cmd->host_scribble = (char *)scb; 1421 1422 /* 1423 * Fill out basics of the HSCB. 1424 */ 1425 hscb->control = 0; 1426 hscb->scsiid = BUILD_SCSIID(ahc, cmd); 1427 hscb->lun = cmd->device->lun; 1428 mask = SCB_GET_TARGET_MASK(ahc, scb); 1429 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb), 1430 SCB_GET_OUR_ID(scb), 1431 SCB_GET_TARGET(ahc, scb), &tstate); 1432 hscb->scsirate = tinfo->scsirate; 1433 hscb->scsioffset = tinfo->curr.offset; 1434 if ((tstate->ultraenb & mask) != 0) 1435 hscb->control |= ULTRAENB; 1436 1437 if ((ahc->user_discenable & mask) != 0) 1438 hscb->control |= DISCENB; 1439 1440 if ((tstate->auto_negotiate & mask) != 0) { 1441 scb->flags |= SCB_AUTO_NEGOTIATE; 1442 scb->hscb->control |= MK_MESSAGE; 1443 } 1444 1445 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) { 1446 int msg_bytes; 1447 uint8_t tag_msgs[2]; 1448 1449 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); 1450 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { 1451 hscb->control |= tag_msgs[0]; 1452 if (tag_msgs[0] == MSG_ORDERED_TASK) 1453 dev->commands_since_idle_or_otag = 0; 1454 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH 1455 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) { 1456 hscb->control |= MSG_ORDERED_TASK; 1457 dev->commands_since_idle_or_otag = 0; 1458 } else { 1459 hscb->control |= MSG_SIMPLE_TASK; 1460 } 1461 } 1462 1463 hscb->cdb_len = cmd->cmd_len; 1464 if (hscb->cdb_len <= 12) { 1465 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len); 1466 } else { 1467 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len); 1468 scb->flags |= SCB_CDB32_PTR; 1469 } 1470 1471 scb->platform_data->xfer_len = 0; 1472 ahc_set_residual(scb, 0); 1473 ahc_set_sense_residual(scb, 0); 1474 scb->sg_count = 0; 1475 if (cmd->use_sg != 0) { 1476 struct ahc_dma_seg *sg; 1477 struct scatterlist *cur_seg; 1478 struct scatterlist *end_seg; 1479 int nseg; 1480 1481 cur_seg = (struct scatterlist *)cmd->request_buffer; 1482 nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg, 1483 cmd->sc_data_direction); 1484 end_seg = cur_seg + nseg; 1485 /* Copy the segments into the SG list. */ 1486 sg = scb->sg_list; 1487 /* 1488 * The sg_count may be larger than nseg if 1489 * a transfer crosses a 32bit page. 1490 */ 1491 while (cur_seg < end_seg) { 1492 dma_addr_t addr; 1493 bus_size_t len; 1494 int consumed; 1495 1496 addr = sg_dma_address(cur_seg); 1497 len = sg_dma_len(cur_seg); 1498 consumed = ahc_linux_map_seg(ahc, scb, 1499 sg, addr, len); 1500 sg += consumed; 1501 scb->sg_count += consumed; 1502 cur_seg++; 1503 } 1504 sg--; 1505 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); 1506 1507 /* 1508 * Reset the sg list pointer. 1509 */ 1510 scb->hscb->sgptr = 1511 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); 1512 1513 /* 1514 * Copy the first SG into the "current" 1515 * data pointer area. 1516 */ 1517 scb->hscb->dataptr = scb->sg_list->addr; 1518 scb->hscb->datacnt = scb->sg_list->len; 1519 } else if (cmd->request_bufflen != 0) { 1520 struct ahc_dma_seg *sg; 1521 dma_addr_t addr; 1522 1523 sg = scb->sg_list; 1524 addr = pci_map_single(ahc->dev_softc, 1525 cmd->request_buffer, 1526 cmd->request_bufflen, 1527 cmd->sc_data_direction); 1528 scb->platform_data->buf_busaddr = addr; 1529 scb->sg_count = ahc_linux_map_seg(ahc, scb, 1530 sg, addr, 1531 cmd->request_bufflen); 1532 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); 1533 1534 /* 1535 * Reset the sg list pointer. 1536 */ 1537 scb->hscb->sgptr = 1538 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); 1539 1540 /* 1541 * Copy the first SG into the "current" 1542 * data pointer area. 1543 */ 1544 scb->hscb->dataptr = sg->addr; 1545 scb->hscb->datacnt = sg->len; 1546 } else { 1547 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL); 1548 scb->hscb->dataptr = 0; 1549 scb->hscb->datacnt = 0; 1550 scb->sg_count = 0; 1551 } 1552 1553 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links); 1554 dev->openings--; 1555 dev->active++; 1556 dev->commands_issued++; 1557 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0) 1558 dev->commands_since_idle_or_otag++; 1559 1560 scb->flags |= SCB_ACTIVE; 1561 if (untagged_q) { 1562 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe); 1563 scb->flags |= SCB_UNTAGGEDQ; 1564 } 1565 ahc_queue_scb(ahc, scb); 1566 return 0; 1567 } 1568 1569 /* 1570 * SCSI controller interrupt handler. 1571 */ 1572 irqreturn_t 1573 ahc_linux_isr(int irq, void *dev_id) 1574 { 1575 struct ahc_softc *ahc; 1576 u_long flags; 1577 int ours; 1578 1579 ahc = (struct ahc_softc *) dev_id; 1580 ahc_lock(ahc, &flags); 1581 ours = ahc_intr(ahc); 1582 ahc_unlock(ahc, &flags); 1583 return IRQ_RETVAL(ours); 1584 } 1585 1586 void 1587 ahc_platform_flushwork(struct ahc_softc *ahc) 1588 { 1589 1590 } 1591 1592 void 1593 ahc_send_async(struct ahc_softc *ahc, char channel, 1594 u_int target, u_int lun, ac_code code) 1595 { 1596 switch (code) { 1597 case AC_TRANSFER_NEG: 1598 { 1599 char buf[80]; 1600 struct scsi_target *starget; 1601 struct ahc_linux_target *targ; 1602 struct info_str info; 1603 struct ahc_initiator_tinfo *tinfo; 1604 struct ahc_tmode_tstate *tstate; 1605 int target_offset; 1606 unsigned int target_ppr_options; 1607 1608 BUG_ON(target == CAM_TARGET_WILDCARD); 1609 1610 info.buffer = buf; 1611 info.length = sizeof(buf); 1612 info.offset = 0; 1613 info.pos = 0; 1614 tinfo = ahc_fetch_transinfo(ahc, channel, 1615 channel == 'A' ? ahc->our_id 1616 : ahc->our_id_b, 1617 target, &tstate); 1618 1619 /* 1620 * Don't bother reporting results while 1621 * negotiations are still pending. 1622 */ 1623 if (tinfo->curr.period != tinfo->goal.period 1624 || tinfo->curr.width != tinfo->goal.width 1625 || tinfo->curr.offset != tinfo->goal.offset 1626 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1627 if (bootverbose == 0) 1628 break; 1629 1630 /* 1631 * Don't bother reporting results that 1632 * are identical to those last reported. 1633 */ 1634 target_offset = target; 1635 if (channel == 'B') 1636 target_offset += 8; 1637 starget = ahc->platform_data->starget[target_offset]; 1638 if (starget == NULL) 1639 break; 1640 targ = scsi_transport_target_data(starget); 1641 1642 target_ppr_options = 1643 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1644 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1645 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0); 1646 1647 if (tinfo->curr.period == spi_period(starget) 1648 && tinfo->curr.width == spi_width(starget) 1649 && tinfo->curr.offset == spi_offset(starget) 1650 && tinfo->curr.ppr_options == target_ppr_options) 1651 if (bootverbose == 0) 1652 break; 1653 1654 spi_period(starget) = tinfo->curr.period; 1655 spi_width(starget) = tinfo->curr.width; 1656 spi_offset(starget) = tinfo->curr.offset; 1657 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1658 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1659 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1660 spi_display_xfer_agreement(starget); 1661 break; 1662 } 1663 case AC_SENT_BDR: 1664 { 1665 WARN_ON(lun != CAM_LUN_WILDCARD); 1666 scsi_report_device_reset(ahc->platform_data->host, 1667 channel - 'A', target); 1668 break; 1669 } 1670 case AC_BUS_RESET: 1671 if (ahc->platform_data->host != NULL) { 1672 scsi_report_bus_reset(ahc->platform_data->host, 1673 channel - 'A'); 1674 } 1675 break; 1676 default: 1677 panic("ahc_send_async: Unexpected async event"); 1678 } 1679 } 1680 1681 /* 1682 * Calls the higher level scsi done function and frees the scb. 1683 */ 1684 void 1685 ahc_done(struct ahc_softc *ahc, struct scb *scb) 1686 { 1687 struct scsi_cmnd *cmd; 1688 struct ahc_linux_device *dev; 1689 1690 LIST_REMOVE(scb, pending_links); 1691 if ((scb->flags & SCB_UNTAGGEDQ) != 0) { 1692 struct scb_tailq *untagged_q; 1693 int target_offset; 1694 1695 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); 1696 untagged_q = &(ahc->untagged_queues[target_offset]); 1697 TAILQ_REMOVE(untagged_q, scb, links.tqe); 1698 BUG_ON(!TAILQ_EMPTY(untagged_q)); 1699 } 1700 1701 if ((scb->flags & SCB_ACTIVE) == 0) { 1702 printf("SCB %d done'd twice\n", scb->hscb->tag); 1703 ahc_dump_card_state(ahc); 1704 panic("Stopping for safety"); 1705 } 1706 cmd = scb->io_ctx; 1707 dev = scb->platform_data->dev; 1708 dev->active--; 1709 dev->openings++; 1710 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1711 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1712 dev->qfrozen--; 1713 } 1714 ahc_linux_unmap_scb(ahc, scb); 1715 1716 /* 1717 * Guard against stale sense data. 1718 * The Linux mid-layer assumes that sense 1719 * was retrieved anytime the first byte of 1720 * the sense buffer looks "sane". 1721 */ 1722 cmd->sense_buffer[0] = 0; 1723 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) { 1724 uint32_t amount_xferred; 1725 1726 amount_xferred = 1727 ahc_get_transfer_length(scb) - ahc_get_residual(scb); 1728 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1729 #ifdef AHC_DEBUG 1730 if ((ahc_debug & AHC_SHOW_MISC) != 0) { 1731 ahc_print_path(ahc, scb); 1732 printf("Set CAM_UNCOR_PARITY\n"); 1733 } 1734 #endif 1735 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY); 1736 #ifdef AHC_REPORT_UNDERFLOWS 1737 /* 1738 * This code is disabled by default as some 1739 * clients of the SCSI system do not properly 1740 * initialize the underflow parameter. This 1741 * results in spurious termination of commands 1742 * that complete as expected (e.g. underflow is 1743 * allowed as command can return variable amounts 1744 * of data. 1745 */ 1746 } else if (amount_xferred < scb->io_ctx->underflow) { 1747 u_int i; 1748 1749 ahc_print_path(ahc, scb); 1750 printf("CDB:"); 1751 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1752 printf(" 0x%x", scb->io_ctx->cmnd[i]); 1753 printf("\n"); 1754 ahc_print_path(ahc, scb); 1755 printf("Saw underflow (%ld of %ld bytes). " 1756 "Treated as error\n", 1757 ahc_get_residual(scb), 1758 ahc_get_transfer_length(scb)); 1759 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1760 #endif 1761 } else { 1762 ahc_set_transaction_status(scb, CAM_REQ_CMP); 1763 } 1764 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1765 ahc_linux_handle_scsi_status(ahc, cmd->device, scb); 1766 } 1767 1768 if (dev->openings == 1 1769 && ahc_get_transaction_status(scb) == CAM_REQ_CMP 1770 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1771 dev->tag_success_count++; 1772 /* 1773 * Some devices deal with temporary internal resource 1774 * shortages by returning queue full. When the queue 1775 * full occurrs, we throttle back. Slowly try to get 1776 * back to our previous queue depth. 1777 */ 1778 if ((dev->openings + dev->active) < dev->maxtags 1779 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) { 1780 dev->tag_success_count = 0; 1781 dev->openings++; 1782 } 1783 1784 if (dev->active == 0) 1785 dev->commands_since_idle_or_otag = 0; 1786 1787 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1788 printf("Recovery SCB completes\n"); 1789 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT 1790 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED) 1791 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1792 1793 if (ahc->platform_data->eh_done) 1794 complete(ahc->platform_data->eh_done); 1795 } 1796 1797 ahc_free_scb(ahc, scb); 1798 ahc_linux_queue_cmd_complete(ahc, cmd); 1799 } 1800 1801 static void 1802 ahc_linux_handle_scsi_status(struct ahc_softc *ahc, 1803 struct scsi_device *sdev, struct scb *scb) 1804 { 1805 struct ahc_devinfo devinfo; 1806 struct ahc_linux_device *dev = scsi_transport_device_data(sdev); 1807 1808 ahc_compile_devinfo(&devinfo, 1809 ahc->our_id, 1810 sdev->sdev_target->id, sdev->lun, 1811 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1812 ROLE_INITIATOR); 1813 1814 /* 1815 * We don't currently trust the mid-layer to 1816 * properly deal with queue full or busy. So, 1817 * when one occurs, we tell the mid-layer to 1818 * unconditionally requeue the command to us 1819 * so that we can retry it ourselves. We also 1820 * implement our own throttling mechanism so 1821 * we don't clobber the device with too many 1822 * commands. 1823 */ 1824 switch (ahc_get_scsi_status(scb)) { 1825 default: 1826 break; 1827 case SCSI_STATUS_CHECK_COND: 1828 case SCSI_STATUS_CMD_TERMINATED: 1829 { 1830 struct scsi_cmnd *cmd; 1831 1832 /* 1833 * Copy sense information to the OS's cmd 1834 * structure if it is available. 1835 */ 1836 cmd = scb->io_ctx; 1837 if (scb->flags & SCB_SENSE) { 1838 u_int sense_size; 1839 1840 sense_size = min(sizeof(struct scsi_sense_data) 1841 - ahc_get_sense_residual(scb), 1842 (u_long)sizeof(cmd->sense_buffer)); 1843 memcpy(cmd->sense_buffer, 1844 ahc_get_sense_buf(ahc, scb), sense_size); 1845 if (sense_size < sizeof(cmd->sense_buffer)) 1846 memset(&cmd->sense_buffer[sense_size], 0, 1847 sizeof(cmd->sense_buffer) - sense_size); 1848 cmd->result |= (DRIVER_SENSE << 24); 1849 #ifdef AHC_DEBUG 1850 if (ahc_debug & AHC_SHOW_SENSE) { 1851 int i; 1852 1853 printf("Copied %d bytes of sense data:", 1854 sense_size); 1855 for (i = 0; i < sense_size; i++) { 1856 if ((i & 0xF) == 0) 1857 printf("\n"); 1858 printf("0x%x ", cmd->sense_buffer[i]); 1859 } 1860 printf("\n"); 1861 } 1862 #endif 1863 } 1864 break; 1865 } 1866 case SCSI_STATUS_QUEUE_FULL: 1867 { 1868 /* 1869 * By the time the core driver has returned this 1870 * command, all other commands that were queued 1871 * to us but not the device have been returned. 1872 * This ensures that dev->active is equal to 1873 * the number of commands actually queued to 1874 * the device. 1875 */ 1876 dev->tag_success_count = 0; 1877 if (dev->active != 0) { 1878 /* 1879 * Drop our opening count to the number 1880 * of commands currently outstanding. 1881 */ 1882 dev->openings = 0; 1883 /* 1884 ahc_print_path(ahc, scb); 1885 printf("Dropping tag count to %d\n", dev->active); 1886 */ 1887 if (dev->active == dev->tags_on_last_queuefull) { 1888 1889 dev->last_queuefull_same_count++; 1890 /* 1891 * If we repeatedly see a queue full 1892 * at the same queue depth, this 1893 * device has a fixed number of tag 1894 * slots. Lock in this tag depth 1895 * so we stop seeing queue fulls from 1896 * this device. 1897 */ 1898 if (dev->last_queuefull_same_count 1899 == AHC_LOCK_TAGS_COUNT) { 1900 dev->maxtags = dev->active; 1901 ahc_print_path(ahc, scb); 1902 printf("Locking max tag count at %d\n", 1903 dev->active); 1904 } 1905 } else { 1906 dev->tags_on_last_queuefull = dev->active; 1907 dev->last_queuefull_same_count = 0; 1908 } 1909 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ); 1910 ahc_set_scsi_status(scb, SCSI_STATUS_OK); 1911 ahc_platform_set_tags(ahc, sdev, &devinfo, 1912 (dev->flags & AHC_DEV_Q_BASIC) 1913 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1914 break; 1915 } 1916 /* 1917 * Drop down to a single opening, and treat this 1918 * as if the target returned BUSY SCSI status. 1919 */ 1920 dev->openings = 1; 1921 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY); 1922 ahc_platform_set_tags(ahc, sdev, &devinfo, 1923 (dev->flags & AHC_DEV_Q_BASIC) 1924 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1925 break; 1926 } 1927 } 1928 } 1929 1930 static void 1931 ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd) 1932 { 1933 /* 1934 * Map CAM error codes into Linux Error codes. We 1935 * avoid the conversion so that the DV code has the 1936 * full error information available when making 1937 * state change decisions. 1938 */ 1939 { 1940 u_int new_status; 1941 1942 switch (ahc_cmd_get_transaction_status(cmd)) { 1943 case CAM_REQ_INPROG: 1944 case CAM_REQ_CMP: 1945 case CAM_SCSI_STATUS_ERROR: 1946 new_status = DID_OK; 1947 break; 1948 case CAM_REQ_ABORTED: 1949 new_status = DID_ABORT; 1950 break; 1951 case CAM_BUSY: 1952 new_status = DID_BUS_BUSY; 1953 break; 1954 case CAM_REQ_INVALID: 1955 case CAM_PATH_INVALID: 1956 new_status = DID_BAD_TARGET; 1957 break; 1958 case CAM_SEL_TIMEOUT: 1959 new_status = DID_NO_CONNECT; 1960 break; 1961 case CAM_SCSI_BUS_RESET: 1962 case CAM_BDR_SENT: 1963 new_status = DID_RESET; 1964 break; 1965 case CAM_UNCOR_PARITY: 1966 new_status = DID_PARITY; 1967 break; 1968 case CAM_CMD_TIMEOUT: 1969 new_status = DID_TIME_OUT; 1970 break; 1971 case CAM_UA_ABORT: 1972 case CAM_REQ_CMP_ERR: 1973 case CAM_AUTOSENSE_FAIL: 1974 case CAM_NO_HBA: 1975 case CAM_DATA_RUN_ERR: 1976 case CAM_UNEXP_BUSFREE: 1977 case CAM_SEQUENCE_FAIL: 1978 case CAM_CCB_LEN_ERR: 1979 case CAM_PROVIDE_FAIL: 1980 case CAM_REQ_TERMIO: 1981 case CAM_UNREC_HBA_ERROR: 1982 case CAM_REQ_TOO_BIG: 1983 new_status = DID_ERROR; 1984 break; 1985 case CAM_REQUEUE_REQ: 1986 new_status = DID_REQUEUE; 1987 break; 1988 default: 1989 /* We should never get here */ 1990 new_status = DID_ERROR; 1991 break; 1992 } 1993 1994 ahc_cmd_set_transaction_status(cmd, new_status); 1995 } 1996 1997 cmd->scsi_done(cmd); 1998 } 1999 2000 static void 2001 ahc_linux_freeze_simq(struct ahc_softc *ahc) 2002 { 2003 unsigned long s; 2004 2005 ahc_lock(ahc, &s); 2006 ahc->platform_data->qfrozen++; 2007 if (ahc->platform_data->qfrozen == 1) { 2008 scsi_block_requests(ahc->platform_data->host); 2009 2010 /* XXX What about Twin channels? */ 2011 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, 2012 CAM_LUN_WILDCARD, SCB_LIST_NULL, 2013 ROLE_INITIATOR, CAM_REQUEUE_REQ); 2014 } 2015 ahc_unlock(ahc, &s); 2016 } 2017 2018 static void 2019 ahc_linux_release_simq(struct ahc_softc *ahc) 2020 { 2021 u_long s; 2022 int unblock_reqs; 2023 2024 unblock_reqs = 0; 2025 ahc_lock(ahc, &s); 2026 if (ahc->platform_data->qfrozen > 0) 2027 ahc->platform_data->qfrozen--; 2028 if (ahc->platform_data->qfrozen == 0) 2029 unblock_reqs = 1; 2030 ahc_unlock(ahc, &s); 2031 /* 2032 * There is still a race here. The mid-layer 2033 * should keep its own freeze count and use 2034 * a bottom half handler to run the queues 2035 * so we can unblock with our own lock held. 2036 */ 2037 if (unblock_reqs) 2038 scsi_unblock_requests(ahc->platform_data->host); 2039 } 2040 2041 static int 2042 ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag) 2043 { 2044 struct ahc_softc *ahc; 2045 struct ahc_linux_device *dev; 2046 struct scb *pending_scb; 2047 u_int saved_scbptr; 2048 u_int active_scb_index; 2049 u_int last_phase; 2050 u_int saved_scsiid; 2051 u_int cdb_byte; 2052 int retval; 2053 int was_paused; 2054 int paused; 2055 int wait; 2056 int disconnected; 2057 unsigned long flags; 2058 2059 pending_scb = NULL; 2060 paused = FALSE; 2061 wait = FALSE; 2062 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 2063 2064 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n", 2065 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET"); 2066 2067 printf("CDB:"); 2068 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2069 printf(" 0x%x", cmd->cmnd[cdb_byte]); 2070 printf("\n"); 2071 2072 ahc_lock(ahc, &flags); 2073 2074 /* 2075 * First determine if we currently own this command. 2076 * Start by searching the device queue. If not found 2077 * there, check the pending_scb list. If not found 2078 * at all, and the system wanted us to just abort the 2079 * command, return success. 2080 */ 2081 dev = scsi_transport_device_data(cmd->device); 2082 2083 if (dev == NULL) { 2084 /* 2085 * No target device for this command exists, 2086 * so we must not still own the command. 2087 */ 2088 printf("%s:%d:%d:%d: Is not an active device\n", 2089 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2090 cmd->device->lun); 2091 retval = SUCCESS; 2092 goto no_cmd; 2093 } 2094 2095 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0 2096 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id, 2097 cmd->device->channel + 'A', 2098 cmd->device->lun, 2099 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) { 2100 printf("%s:%d:%d:%d: Command found on untagged queue\n", 2101 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2102 cmd->device->lun); 2103 retval = SUCCESS; 2104 goto done; 2105 } 2106 2107 /* 2108 * See if we can find a matching cmd in the pending list. 2109 */ 2110 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2111 if (pending_scb->io_ctx == cmd) 2112 break; 2113 } 2114 2115 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) { 2116 2117 /* Any SCB for this device will do for a target reset */ 2118 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2119 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd), 2120 scmd_channel(cmd) + 'A', 2121 CAM_LUN_WILDCARD, 2122 SCB_LIST_NULL, ROLE_INITIATOR)) 2123 break; 2124 } 2125 } 2126 2127 if (pending_scb == NULL) { 2128 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2129 goto no_cmd; 2130 } 2131 2132 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2133 /* 2134 * We can't queue two recovery actions using the same SCB 2135 */ 2136 retval = FAILED; 2137 goto done; 2138 } 2139 2140 /* 2141 * Ensure that the card doesn't do anything 2142 * behind our back and that we didn't "just" miss 2143 * an interrupt that would affect this cmd. 2144 */ 2145 was_paused = ahc_is_paused(ahc); 2146 ahc_pause_and_flushwork(ahc); 2147 paused = TRUE; 2148 2149 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2150 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2151 goto no_cmd; 2152 } 2153 2154 printf("%s: At time of recovery, card was %spaused\n", 2155 ahc_name(ahc), was_paused ? "" : "not "); 2156 ahc_dump_card_state(ahc); 2157 2158 disconnected = TRUE; 2159 if (flag == SCB_ABORT) { 2160 if (ahc_search_qinfifo(ahc, cmd->device->id, 2161 cmd->device->channel + 'A', 2162 cmd->device->lun, 2163 pending_scb->hscb->tag, 2164 ROLE_INITIATOR, CAM_REQ_ABORTED, 2165 SEARCH_COMPLETE) > 0) { 2166 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2167 ahc_name(ahc), cmd->device->channel, 2168 cmd->device->id, cmd->device->lun); 2169 retval = SUCCESS; 2170 goto done; 2171 } 2172 } else if (ahc_search_qinfifo(ahc, cmd->device->id, 2173 cmd->device->channel + 'A', 2174 cmd->device->lun, pending_scb->hscb->tag, 2175 ROLE_INITIATOR, /*status*/0, 2176 SEARCH_COUNT) > 0) { 2177 disconnected = FALSE; 2178 } 2179 2180 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2181 struct scb *bus_scb; 2182 2183 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG)); 2184 if (bus_scb == pending_scb) 2185 disconnected = FALSE; 2186 else if (flag != SCB_ABORT 2187 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid 2188 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb)) 2189 disconnected = FALSE; 2190 } 2191 2192 /* 2193 * At this point, pending_scb is the scb associated with the 2194 * passed in command. That command is currently active on the 2195 * bus, is in the disconnected state, or we're hoping to find 2196 * a command for the same target active on the bus to abuse to 2197 * send a BDR. Queue the appropriate message based on which of 2198 * these states we are in. 2199 */ 2200 last_phase = ahc_inb(ahc, LASTPHASE); 2201 saved_scbptr = ahc_inb(ahc, SCBPTR); 2202 active_scb_index = ahc_inb(ahc, SCB_TAG); 2203 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); 2204 if (last_phase != P_BUSFREE 2205 && (pending_scb->hscb->tag == active_scb_index 2206 || (flag == SCB_DEVICE_RESET 2207 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) { 2208 2209 /* 2210 * We're active on the bus, so assert ATN 2211 * and hope that the target responds. 2212 */ 2213 pending_scb = ahc_lookup_scb(ahc, active_scb_index); 2214 pending_scb->flags |= SCB_RECOVERY_SCB|flag; 2215 ahc_outb(ahc, MSG_OUT, HOST_MSG); 2216 ahc_outb(ahc, SCSISIGO, last_phase|ATNO); 2217 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2218 wait = TRUE; 2219 } else if (disconnected) { 2220 2221 /* 2222 * Actually re-queue this SCB in an attempt 2223 * to select the device before it reconnects. 2224 * In either case (selection or reselection), 2225 * we will now issue the approprate message 2226 * to the timed-out device. 2227 * 2228 * Set the MK_MESSAGE control bit indicating 2229 * that we desire to send a message. We 2230 * also set the disconnected flag since 2231 * in the paging case there is no guarantee 2232 * that our SCB control byte matches the 2233 * version on the card. We don't want the 2234 * sequencer to abort the command thinking 2235 * an unsolicited reselection occurred. 2236 */ 2237 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2238 pending_scb->flags |= SCB_RECOVERY_SCB|flag; 2239 2240 /* 2241 * Remove any cached copy of this SCB in the 2242 * disconnected list in preparation for the 2243 * queuing of our abort SCB. We use the 2244 * same element in the SCB, SCB_NEXT, for 2245 * both the qinfifo and the disconnected list. 2246 */ 2247 ahc_search_disc_list(ahc, cmd->device->id, 2248 cmd->device->channel + 'A', 2249 cmd->device->lun, pending_scb->hscb->tag, 2250 /*stop_on_first*/TRUE, 2251 /*remove*/TRUE, 2252 /*save_state*/FALSE); 2253 2254 /* 2255 * In the non-paging case, the sequencer will 2256 * never re-reference the in-core SCB. 2257 * To make sure we are notified during 2258 * reslection, set the MK_MESSAGE flag in 2259 * the card's copy of the SCB. 2260 */ 2261 if ((ahc->flags & AHC_PAGESCBS) == 0) { 2262 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag); 2263 ahc_outb(ahc, SCB_CONTROL, 2264 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE); 2265 } 2266 2267 /* 2268 * Clear out any entries in the QINFIFO first 2269 * so we are the next SCB for this target 2270 * to run. 2271 */ 2272 ahc_search_qinfifo(ahc, cmd->device->id, 2273 cmd->device->channel + 'A', 2274 cmd->device->lun, SCB_LIST_NULL, 2275 ROLE_INITIATOR, CAM_REQUEUE_REQ, 2276 SEARCH_COMPLETE); 2277 ahc_qinfifo_requeue_tail(ahc, pending_scb); 2278 ahc_outb(ahc, SCBPTR, saved_scbptr); 2279 ahc_print_path(ahc, pending_scb); 2280 printf("Device is disconnected, re-queuing SCB\n"); 2281 wait = TRUE; 2282 } else { 2283 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2284 retval = FAILED; 2285 goto done; 2286 } 2287 2288 no_cmd: 2289 /* 2290 * Our assumption is that if we don't have the command, no 2291 * recovery action was required, so we return success. Again, 2292 * the semantics of the mid-layer recovery engine are not 2293 * well defined, so this may change in time. 2294 */ 2295 retval = SUCCESS; 2296 done: 2297 if (paused) 2298 ahc_unpause(ahc); 2299 if (wait) { 2300 DECLARE_COMPLETION_ONSTACK(done); 2301 2302 ahc->platform_data->eh_done = &done; 2303 ahc_unlock(ahc, &flags); 2304 2305 printf("Recovery code sleeping\n"); 2306 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2307 ahc_lock(ahc, &flags); 2308 ahc->platform_data->eh_done = NULL; 2309 ahc_unlock(ahc, &flags); 2310 2311 printf("Timer Expired\n"); 2312 retval = FAILED; 2313 } 2314 printf("Recovery code awake\n"); 2315 } else 2316 ahc_unlock(ahc, &flags); 2317 return (retval); 2318 } 2319 2320 void 2321 ahc_platform_dump_card_state(struct ahc_softc *ahc) 2322 { 2323 } 2324 2325 static void ahc_linux_set_width(struct scsi_target *starget, int width) 2326 { 2327 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2328 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2329 struct ahc_devinfo devinfo; 2330 unsigned long flags; 2331 2332 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2333 starget->channel + 'A', ROLE_INITIATOR); 2334 ahc_lock(ahc, &flags); 2335 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE); 2336 ahc_unlock(ahc, &flags); 2337 } 2338 2339 static void ahc_linux_set_period(struct scsi_target *starget, int period) 2340 { 2341 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2342 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2343 struct ahc_tmode_tstate *tstate; 2344 struct ahc_initiator_tinfo *tinfo 2345 = ahc_fetch_transinfo(ahc, 2346 starget->channel + 'A', 2347 shost->this_id, starget->id, &tstate); 2348 struct ahc_devinfo devinfo; 2349 unsigned int ppr_options = tinfo->goal.ppr_options; 2350 unsigned long flags; 2351 unsigned long offset = tinfo->goal.offset; 2352 struct ahc_syncrate *syncrate; 2353 2354 if (offset == 0) 2355 offset = MAX_OFFSET; 2356 2357 if (period < 9) 2358 period = 9; /* 12.5ns is our minimum */ 2359 if (period == 9) 2360 ppr_options |= MSG_EXT_PPR_DT_REQ; 2361 2362 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2363 starget->channel + 'A', ROLE_INITIATOR); 2364 2365 /* all PPR requests apart from QAS require wide transfers */ 2366 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2367 if (spi_width(starget) == 0) 2368 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2369 } 2370 2371 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2372 ahc_lock(ahc, &flags); 2373 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2374 ppr_options, AHC_TRANS_GOAL, FALSE); 2375 ahc_unlock(ahc, &flags); 2376 } 2377 2378 static void ahc_linux_set_offset(struct scsi_target *starget, int offset) 2379 { 2380 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2381 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2382 struct ahc_tmode_tstate *tstate; 2383 struct ahc_initiator_tinfo *tinfo 2384 = ahc_fetch_transinfo(ahc, 2385 starget->channel + 'A', 2386 shost->this_id, starget->id, &tstate); 2387 struct ahc_devinfo devinfo; 2388 unsigned int ppr_options = 0; 2389 unsigned int period = 0; 2390 unsigned long flags; 2391 struct ahc_syncrate *syncrate = NULL; 2392 2393 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2394 starget->channel + 'A', ROLE_INITIATOR); 2395 if (offset != 0) { 2396 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2397 period = tinfo->goal.period; 2398 ppr_options = tinfo->goal.ppr_options; 2399 } 2400 ahc_lock(ahc, &flags); 2401 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2402 ppr_options, AHC_TRANS_GOAL, FALSE); 2403 ahc_unlock(ahc, &flags); 2404 } 2405 2406 static void ahc_linux_set_dt(struct scsi_target *starget, int dt) 2407 { 2408 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2409 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2410 struct ahc_tmode_tstate *tstate; 2411 struct ahc_initiator_tinfo *tinfo 2412 = ahc_fetch_transinfo(ahc, 2413 starget->channel + 'A', 2414 shost->this_id, starget->id, &tstate); 2415 struct ahc_devinfo devinfo; 2416 unsigned int ppr_options = tinfo->goal.ppr_options 2417 & ~MSG_EXT_PPR_DT_REQ; 2418 unsigned int period = tinfo->goal.period; 2419 unsigned int width = tinfo->goal.width; 2420 unsigned long flags; 2421 struct ahc_syncrate *syncrate; 2422 2423 if (dt) { 2424 ppr_options |= MSG_EXT_PPR_DT_REQ; 2425 if (!width) 2426 ahc_linux_set_width(starget, 1); 2427 } else if (period == 9) 2428 period = 10; /* if resetting DT, period must be >= 25ns */ 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 #if 0 2440 /* FIXME: This code claims to support IU and QAS. However, the actual 2441 * sequencer code and aic7xxx_core have no support for these parameters and 2442 * will get into a bad state if they're negotiated. Do not enable this 2443 * unless you know what you're doing */ 2444 static void ahc_linux_set_qas(struct scsi_target *starget, int qas) 2445 { 2446 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2447 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2448 struct ahc_tmode_tstate *tstate; 2449 struct ahc_initiator_tinfo *tinfo 2450 = ahc_fetch_transinfo(ahc, 2451 starget->channel + 'A', 2452 shost->this_id, starget->id, &tstate); 2453 struct ahc_devinfo devinfo; 2454 unsigned int ppr_options = tinfo->goal.ppr_options 2455 & ~MSG_EXT_PPR_QAS_REQ; 2456 unsigned int period = tinfo->goal.period; 2457 unsigned long flags; 2458 struct ahc_syncrate *syncrate; 2459 2460 if (qas) 2461 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2462 2463 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2464 starget->channel + 'A', ROLE_INITIATOR); 2465 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2466 ahc_lock(ahc, &flags); 2467 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2468 ppr_options, AHC_TRANS_GOAL, FALSE); 2469 ahc_unlock(ahc, &flags); 2470 } 2471 2472 static void ahc_linux_set_iu(struct scsi_target *starget, int iu) 2473 { 2474 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2475 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2476 struct ahc_tmode_tstate *tstate; 2477 struct ahc_initiator_tinfo *tinfo 2478 = ahc_fetch_transinfo(ahc, 2479 starget->channel + 'A', 2480 shost->this_id, starget->id, &tstate); 2481 struct ahc_devinfo devinfo; 2482 unsigned int ppr_options = tinfo->goal.ppr_options 2483 & ~MSG_EXT_PPR_IU_REQ; 2484 unsigned int period = tinfo->goal.period; 2485 unsigned long flags; 2486 struct ahc_syncrate *syncrate; 2487 2488 if (iu) 2489 ppr_options |= MSG_EXT_PPR_IU_REQ; 2490 2491 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2492 starget->channel + 'A', ROLE_INITIATOR); 2493 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2494 ahc_lock(ahc, &flags); 2495 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2496 ppr_options, AHC_TRANS_GOAL, FALSE); 2497 ahc_unlock(ahc, &flags); 2498 } 2499 #endif 2500 2501 static void ahc_linux_get_signalling(struct Scsi_Host *shost) 2502 { 2503 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata; 2504 unsigned long flags; 2505 u8 mode; 2506 2507 if (!(ahc->features & AHC_ULTRA2)) { 2508 /* non-LVD chipset, may not have SBLKCTL reg */ 2509 spi_signalling(shost) = 2510 ahc->features & AHC_HVD ? 2511 SPI_SIGNAL_HVD : 2512 SPI_SIGNAL_SE; 2513 return; 2514 } 2515 2516 ahc_lock(ahc, &flags); 2517 ahc_pause(ahc); 2518 mode = ahc_inb(ahc, SBLKCTL); 2519 ahc_unpause(ahc); 2520 ahc_unlock(ahc, &flags); 2521 2522 if (mode & ENAB40) 2523 spi_signalling(shost) = SPI_SIGNAL_LVD; 2524 else if (mode & ENAB20) 2525 spi_signalling(shost) = SPI_SIGNAL_SE; 2526 else 2527 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2528 } 2529 2530 static struct spi_function_template ahc_linux_transport_functions = { 2531 .set_offset = ahc_linux_set_offset, 2532 .show_offset = 1, 2533 .set_period = ahc_linux_set_period, 2534 .show_period = 1, 2535 .set_width = ahc_linux_set_width, 2536 .show_width = 1, 2537 .set_dt = ahc_linux_set_dt, 2538 .show_dt = 1, 2539 #if 0 2540 .set_iu = ahc_linux_set_iu, 2541 .show_iu = 1, 2542 .set_qas = ahc_linux_set_qas, 2543 .show_qas = 1, 2544 #endif 2545 .get_signalling = ahc_linux_get_signalling, 2546 }; 2547 2548 2549 2550 static int __init 2551 ahc_linux_init(void) 2552 { 2553 /* 2554 * If we've been passed any parameters, process them now. 2555 */ 2556 if (aic7xxx) 2557 aic7xxx_setup(aic7xxx); 2558 2559 ahc_linux_transport_template = 2560 spi_attach_transport(&ahc_linux_transport_functions); 2561 if (!ahc_linux_transport_template) 2562 return -ENODEV; 2563 2564 scsi_transport_reserve_device(ahc_linux_transport_template, 2565 sizeof(struct ahc_linux_device)); 2566 2567 ahc_linux_pci_init(); 2568 ahc_linux_eisa_init(); 2569 return 0; 2570 } 2571 2572 static void 2573 ahc_linux_exit(void) 2574 { 2575 ahc_linux_pci_exit(); 2576 ahc_linux_eisa_exit(); 2577 spi_release_transport(ahc_linux_transport_template); 2578 } 2579 2580 module_init(ahc_linux_init); 2581 module_exit(ahc_linux_exit); 2582