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 /* 129 * Include aiclib.c as part of our 130 * "module dependencies are hard" work around. 131 */ 132 #include "aiclib.c" 133 134 #include <linux/init.h> /* __setup */ 135 #include <linux/mm.h> /* For fetching system memory size */ 136 #include <linux/blkdev.h> /* For block_size() */ 137 #include <linux/delay.h> /* For ssleep/msleep */ 138 139 140 /* 141 * Set this to the delay in seconds after SCSI bus reset. 142 * Note, we honor this only for the initial bus reset. 143 * The scsi error recovery code performs its own bus settle 144 * delay handling for error recovery actions. 145 */ 146 #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS 147 #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS 148 #else 149 #define AIC7XXX_RESET_DELAY 5000 150 #endif 151 152 /* 153 * Control collection of SCSI transfer statistics for the /proc filesystem. 154 * 155 * NOTE: Do NOT enable this when running on kernels version 1.2.x and below. 156 * NOTE: This does affect performance since it has to maintain statistics. 157 */ 158 #ifdef CONFIG_AIC7XXX_PROC_STATS 159 #define AIC7XXX_PROC_STATS 160 #endif 161 162 /* 163 * To change the default number of tagged transactions allowed per-device, 164 * add a line to the lilo.conf file like: 165 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" 166 * which will result in the first four devices on the first two 167 * controllers being set to a tagged queue depth of 32. 168 * 169 * The tag_commands is an array of 16 to allow for wide and twin adapters. 170 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 171 * for channel 1. 172 */ 173 typedef struct { 174 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */ 175 } adapter_tag_info_t; 176 177 /* 178 * Modify this as you see fit for your system. 179 * 180 * 0 tagged queuing disabled 181 * 1 <= n <= 253 n == max tags ever dispatched. 182 * 183 * The driver will throttle the number of commands dispatched to a 184 * device if it returns queue full. For devices with a fixed maximum 185 * queue depth, the driver will eventually determine this depth and 186 * lock it in (a console message is printed to indicate that a lock 187 * has occurred). On some devices, queue full is returned for a temporary 188 * resource shortage. These devices will return queue full at varying 189 * depths. The driver will throttle back when the queue fulls occur and 190 * attempt to slowly increase the depth over time as the device recovers 191 * from the resource shortage. 192 * 193 * In this example, the first line will disable tagged queueing for all 194 * the devices on the first probed aic7xxx adapter. 195 * 196 * The second line enables tagged queueing with 4 commands/LUN for IDs 197 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the 198 * driver to attempt to use up to 64 tags for ID 1. 199 * 200 * The third line is the same as the first line. 201 * 202 * The fourth line disables tagged queueing for devices 0 and 3. It 203 * enables tagged queueing for the other IDs, with 16 commands/LUN 204 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for 205 * IDs 2, 5-7, and 9-15. 206 */ 207 208 /* 209 * NOTE: The below structure is for reference only, the actual structure 210 * to modify in order to change things is just below this comment block. 211 adapter_tag_info_t aic7xxx_tag_info[] = 212 { 213 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 214 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, 215 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 216 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} 217 }; 218 */ 219 220 #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE 221 #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE 222 #else 223 #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE 224 #endif 225 226 #define AIC7XXX_CONFIGED_TAG_COMMANDS { \ 227 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 228 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 229 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 230 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 231 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 232 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 233 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 234 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \ 235 } 236 237 /* 238 * By default, use the number of commands specified by 239 * the users kernel configuration. 240 */ 241 static adapter_tag_info_t aic7xxx_tag_info[] = 242 { 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 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 254 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 255 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 256 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 257 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 258 {AIC7XXX_CONFIGED_TAG_COMMANDS} 259 }; 260 261 /* 262 * There should be a specific return value for this in scsi.h, but 263 * it seems that most drivers ignore it. 264 */ 265 #define DID_UNDERFLOW DID_ERROR 266 267 void 268 ahc_print_path(struct ahc_softc *ahc, struct scb *scb) 269 { 270 printk("(scsi%d:%c:%d:%d): ", 271 ahc->platform_data->host->host_no, 272 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X', 273 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1, 274 scb != NULL ? SCB_GET_LUN(scb) : -1); 275 } 276 277 /* 278 * XXX - these options apply unilaterally to _all_ 274x/284x/294x 279 * cards in the system. This should be fixed. Exceptions to this 280 * rule are noted in the comments. 281 */ 282 283 /* 284 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This 285 * has no effect on any later resets that might occur due to things like 286 * SCSI bus timeouts. 287 */ 288 static uint32_t aic7xxx_no_reset; 289 290 /* 291 * Should we force EXTENDED translation on a controller. 292 * 0 == Use whatever is in the SEEPROM or default to off 293 * 1 == Use whatever is in the SEEPROM or default to on 294 */ 295 static uint32_t aic7xxx_extended; 296 297 /* 298 * PCI bus parity checking of the Adaptec controllers. This is somewhat 299 * dubious at best. To my knowledge, this option has never actually 300 * solved a PCI parity problem, but on certain machines with broken PCI 301 * chipset configurations where stray PCI transactions with bad parity are 302 * the norm rather than the exception, the error messages can be overwelming. 303 * It's included in the driver for completeness. 304 * 0 = Shut off PCI parity check 305 * non-0 = reverse polarity pci parity checking 306 */ 307 static uint32_t aic7xxx_pci_parity = ~0; 308 309 /* 310 * There are lots of broken chipsets in the world. Some of them will 311 * violate the PCI spec when we issue byte sized memory writes to our 312 * controller. I/O mapped register access, if allowed by the given 313 * platform, will work in almost all cases. 314 */ 315 uint32_t aic7xxx_allow_memio = ~0; 316 317 /* 318 * So that we can set how long each device is given as a selection timeout. 319 * The table of values goes like this: 320 * 0 - 256ms 321 * 1 - 128ms 322 * 2 - 64ms 323 * 3 - 32ms 324 * We default to 256ms because some older devices need a longer time 325 * to respond to initial selection. 326 */ 327 static uint32_t aic7xxx_seltime; 328 329 /* 330 * Certain devices do not perform any aging on commands. Should the 331 * device be saturated by commands in one portion of the disk, it is 332 * possible for transactions on far away sectors to never be serviced. 333 * To handle these devices, we can periodically send an ordered tag to 334 * force all outstanding transactions to be serviced prior to a new 335 * transaction. 336 */ 337 uint32_t aic7xxx_periodic_otag; 338 339 /* 340 * Module information and settable options. 341 */ 342 static char *aic7xxx = NULL; 343 344 MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>"); 345 MODULE_DESCRIPTION("Adaptec Aic77XX/78XX SCSI Host Bus Adapter driver"); 346 MODULE_LICENSE("Dual BSD/GPL"); 347 MODULE_VERSION(AIC7XXX_DRIVER_VERSION); 348 module_param(aic7xxx, charp, 0444); 349 MODULE_PARM_DESC(aic7xxx, 350 "period delimited, options string.\n" 351 " verbose Enable verbose/diagnostic logging\n" 352 " allow_memio Allow device registers to be memory mapped\n" 353 " debug Bitmask of debug values to enable\n" 354 " no_probe Toggle EISA/VLB controller probing\n" 355 " probe_eisa_vl Toggle EISA/VLB controller probing\n" 356 " no_reset Supress initial bus resets\n" 357 " extended Enable extended geometry on all controllers\n" 358 " periodic_otag Send an ordered tagged transaction\n" 359 " periodically to prevent tag starvation.\n" 360 " This may be required by some older disk\n" 361 " drives or RAID arrays.\n" 362 " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n" 363 " tag_info:<tag_str> Set per-target tag depth\n" 364 " global_tag_depth:<int> Global tag depth for every target\n" 365 " on every bus\n" 366 " seltime:<int> Selection Timeout\n" 367 " (0/256ms,1/128ms,2/64ms,3/32ms)\n" 368 "\n" 369 " Sample /etc/modprobe.conf line:\n" 370 " Toggle EISA/VLB probing\n" 371 " Set tag depth on Controller 1/Target 1 to 10 tags\n" 372 " Shorten the selection timeout to 128ms\n" 373 "\n" 374 " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n" 375 ); 376 377 static void ahc_linux_handle_scsi_status(struct ahc_softc *, 378 struct scsi_device *, 379 struct scb *); 380 static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, 381 struct scsi_cmnd *cmd); 382 static void ahc_linux_sem_timeout(u_long arg); 383 static void ahc_linux_freeze_simq(struct ahc_softc *ahc); 384 static void ahc_linux_release_simq(u_long arg); 385 static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag); 386 static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc); 387 static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc, 388 struct ahc_devinfo *devinfo); 389 static void ahc_linux_device_queue_depth(struct scsi_device *); 390 static int ahc_linux_run_command(struct ahc_softc*, 391 struct ahc_linux_device *, 392 struct scsi_cmnd *); 393 static void ahc_linux_setup_tag_info_global(char *p); 394 static aic_option_callback_t ahc_linux_setup_tag_info; 395 static int aic7xxx_setup(char *s); 396 397 static int ahc_linux_unit; 398 399 400 /********************************* Inlines ************************************/ 401 static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*); 402 403 static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, 404 struct ahc_dma_seg *sg, 405 dma_addr_t addr, bus_size_t len); 406 407 static __inline void 408 ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb) 409 { 410 struct scsi_cmnd *cmd; 411 412 cmd = scb->io_ctx; 413 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE); 414 if (cmd->use_sg != 0) { 415 struct scatterlist *sg; 416 417 sg = (struct scatterlist *)cmd->request_buffer; 418 pci_unmap_sg(ahc->dev_softc, sg, cmd->use_sg, 419 cmd->sc_data_direction); 420 } else if (cmd->request_bufflen != 0) { 421 pci_unmap_single(ahc->dev_softc, 422 scb->platform_data->buf_busaddr, 423 cmd->request_bufflen, 424 cmd->sc_data_direction); 425 } 426 } 427 428 static __inline int 429 ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, 430 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len) 431 { 432 int consumed; 433 434 if ((scb->sg_count + 1) > AHC_NSEG) 435 panic("Too few segs for dma mapping. " 436 "Increase AHC_NSEG\n"); 437 438 consumed = 1; 439 sg->addr = ahc_htole32(addr & 0xFFFFFFFF); 440 scb->platform_data->xfer_len += len; 441 442 if (sizeof(dma_addr_t) > 4 443 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0) 444 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK; 445 446 sg->len = ahc_htole32(len); 447 return (consumed); 448 } 449 450 /* 451 * Return a string describing the driver. 452 */ 453 static const char * 454 ahc_linux_info(struct Scsi_Host *host) 455 { 456 static char buffer[512]; 457 char ahc_info[256]; 458 char *bp; 459 struct ahc_softc *ahc; 460 461 bp = &buffer[0]; 462 ahc = *(struct ahc_softc **)host->hostdata; 463 memset(bp, 0, sizeof(buffer)); 464 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev "); 465 strcat(bp, AIC7XXX_DRIVER_VERSION); 466 strcat(bp, "\n"); 467 strcat(bp, " <"); 468 strcat(bp, ahc->description); 469 strcat(bp, ">\n"); 470 strcat(bp, " "); 471 ahc_controller_info(ahc, ahc_info); 472 strcat(bp, ahc_info); 473 strcat(bp, "\n"); 474 475 return (bp); 476 } 477 478 /* 479 * Queue an SCB to the controller. 480 */ 481 static int 482 ahc_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *)) 483 { 484 struct ahc_softc *ahc; 485 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device); 486 487 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 488 489 /* 490 * Save the callback on completion function. 491 */ 492 cmd->scsi_done = scsi_done; 493 494 /* 495 * Close the race of a command that was in the process of 496 * being queued to us just as our simq was frozen. Let 497 * DV commands through so long as we are only frozen to 498 * perform DV. 499 */ 500 if (ahc->platform_data->qfrozen != 0) 501 return SCSI_MLQUEUE_HOST_BUSY; 502 503 cmd->result = CAM_REQ_INPROG << 16; 504 505 return ahc_linux_run_command(ahc, dev, cmd); 506 } 507 508 static inline struct scsi_target ** 509 ahc_linux_target_in_softc(struct scsi_target *starget) 510 { 511 struct ahc_softc *ahc = 512 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); 513 unsigned int target_offset; 514 515 target_offset = starget->id; 516 if (starget->channel != 0) 517 target_offset += 8; 518 519 return &ahc->platform_data->starget[target_offset]; 520 } 521 522 static int 523 ahc_linux_target_alloc(struct scsi_target *starget) 524 { 525 struct ahc_softc *ahc = 526 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); 527 struct seeprom_config *sc = ahc->seep_config; 528 unsigned long flags; 529 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); 530 struct ahc_linux_target *targ = scsi_transport_target_data(starget); 531 unsigned short scsirate; 532 struct ahc_devinfo devinfo; 533 struct ahc_initiator_tinfo *tinfo; 534 struct ahc_tmode_tstate *tstate; 535 char channel = starget->channel + 'A'; 536 unsigned int our_id = ahc->our_id; 537 unsigned int target_offset; 538 539 target_offset = starget->id; 540 if (starget->channel != 0) 541 target_offset += 8; 542 543 if (starget->channel) 544 our_id = ahc->our_id_b; 545 546 ahc_lock(ahc, &flags); 547 548 BUG_ON(*ahc_targp != NULL); 549 550 *ahc_targp = starget; 551 memset(targ, 0, sizeof(*targ)); 552 553 if (sc) { 554 int maxsync = AHC_SYNCRATE_DT; 555 int ultra = 0; 556 int flags = sc->device_flags[target_offset]; 557 558 if (ahc->flags & AHC_NEWEEPROM_FMT) { 559 if (flags & CFSYNCHISULTRA) 560 ultra = 1; 561 } else if (flags & CFULTRAEN) 562 ultra = 1; 563 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04 564 * change it to ultra=0, CFXFER = 0 */ 565 if(ultra && (flags & CFXFER) == 0x04) { 566 ultra = 0; 567 flags &= ~CFXFER; 568 } 569 570 if ((ahc->features & AHC_ULTRA2) != 0) { 571 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0); 572 } else { 573 scsirate = (flags & CFXFER) << 4; 574 maxsync = ultra ? AHC_SYNCRATE_ULTRA : 575 AHC_SYNCRATE_FAST; 576 } 577 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; 578 if (!(flags & CFSYNCH)) 579 spi_max_offset(starget) = 0; 580 spi_min_period(starget) = 581 ahc_find_period(ahc, scsirate, maxsync); 582 583 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id, 584 starget->id, &tstate); 585 } 586 ahc_compile_devinfo(&devinfo, our_id, starget->id, 587 CAM_LUN_WILDCARD, channel, 588 ROLE_INITIATOR); 589 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0, 590 AHC_TRANS_GOAL, /*paused*/FALSE); 591 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 592 AHC_TRANS_GOAL, /*paused*/FALSE); 593 ahc_unlock(ahc, &flags); 594 595 return 0; 596 } 597 598 static void 599 ahc_linux_target_destroy(struct scsi_target *starget) 600 { 601 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); 602 603 *ahc_targp = NULL; 604 } 605 606 static int 607 ahc_linux_slave_alloc(struct scsi_device *sdev) 608 { 609 struct ahc_softc *ahc = 610 *((struct ahc_softc **)sdev->host->hostdata); 611 struct scsi_target *starget = sdev->sdev_target; 612 struct ahc_linux_target *targ = scsi_transport_target_data(starget); 613 struct ahc_linux_device *dev; 614 615 if (bootverbose) 616 printf("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id); 617 618 BUG_ON(targ->sdev[sdev->lun] != NULL); 619 620 dev = scsi_transport_device_data(sdev); 621 memset(dev, 0, sizeof(*dev)); 622 623 /* 624 * We start out life using untagged 625 * transactions of which we allow one. 626 */ 627 dev->openings = 1; 628 629 /* 630 * Set maxtags to 0. This will be changed if we 631 * later determine that we are dealing with 632 * a tagged queuing capable device. 633 */ 634 dev->maxtags = 0; 635 636 targ->sdev[sdev->lun] = sdev; 637 638 return 0; 639 } 640 641 static int 642 ahc_linux_slave_configure(struct scsi_device *sdev) 643 { 644 struct ahc_softc *ahc; 645 646 ahc = *((struct ahc_softc **)sdev->host->hostdata); 647 648 if (bootverbose) 649 printf("%s: Slave Configure %d\n", ahc_name(ahc), sdev->id); 650 651 ahc_linux_device_queue_depth(sdev); 652 653 /* Initial Domain Validation */ 654 if (!spi_initial_dv(sdev->sdev_target)) 655 spi_dv_device(sdev); 656 657 return 0; 658 } 659 660 static void 661 ahc_linux_slave_destroy(struct scsi_device *sdev) 662 { 663 struct ahc_softc *ahc; 664 struct ahc_linux_device *dev = scsi_transport_device_data(sdev); 665 struct ahc_linux_target *targ = scsi_transport_target_data(sdev->sdev_target); 666 667 ahc = *((struct ahc_softc **)sdev->host->hostdata); 668 if (bootverbose) 669 printf("%s: Slave Destroy %d\n", ahc_name(ahc), sdev->id); 670 671 BUG_ON(dev->active); 672 673 targ->sdev[sdev->lun] = NULL; 674 } 675 676 #if defined(__i386__) 677 /* 678 * Return the disk geometry for the given SCSI device. 679 */ 680 static int 681 ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 682 sector_t capacity, int geom[]) 683 { 684 uint8_t *bh; 685 int heads; 686 int sectors; 687 int cylinders; 688 int ret; 689 int extended; 690 struct ahc_softc *ahc; 691 u_int channel; 692 693 ahc = *((struct ahc_softc **)sdev->host->hostdata); 694 channel = sdev->channel; 695 696 bh = scsi_bios_ptable(bdev); 697 if (bh) { 698 ret = scsi_partsize(bh, capacity, 699 &geom[2], &geom[0], &geom[1]); 700 kfree(bh); 701 if (ret != -1) 702 return (ret); 703 } 704 heads = 64; 705 sectors = 32; 706 cylinders = aic_sector_div(capacity, heads, sectors); 707 708 if (aic7xxx_extended != 0) 709 extended = 1; 710 else if (channel == 0) 711 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0; 712 else 713 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0; 714 if (extended && cylinders >= 1024) { 715 heads = 255; 716 sectors = 63; 717 cylinders = aic_sector_div(capacity, heads, sectors); 718 } 719 geom[0] = heads; 720 geom[1] = sectors; 721 geom[2] = cylinders; 722 return (0); 723 } 724 #endif 725 726 /* 727 * Abort the current SCSI command(s). 728 */ 729 static int 730 ahc_linux_abort(struct scsi_cmnd *cmd) 731 { 732 int error; 733 734 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT); 735 if (error != 0) 736 printf("aic7xxx_abort returns 0x%x\n", error); 737 return (error); 738 } 739 740 /* 741 * Attempt to send a target reset message to the device that timed out. 742 */ 743 static int 744 ahc_linux_dev_reset(struct scsi_cmnd *cmd) 745 { 746 int error; 747 748 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET); 749 if (error != 0) 750 printf("aic7xxx_dev_reset returns 0x%x\n", error); 751 return (error); 752 } 753 754 /* 755 * Reset the SCSI bus. 756 */ 757 static int 758 ahc_linux_bus_reset(struct scsi_cmnd *cmd) 759 { 760 struct ahc_softc *ahc; 761 int found; 762 unsigned long flags; 763 764 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 765 766 ahc_lock(ahc, &flags); 767 found = ahc_reset_channel(ahc, cmd->device->channel + 'A', 768 /*initiate reset*/TRUE); 769 ahc_unlock(ahc, &flags); 770 771 if (bootverbose) 772 printf("%s: SCSI bus reset delivered. " 773 "%d SCBs aborted.\n", ahc_name(ahc), found); 774 775 return SUCCESS; 776 } 777 778 struct scsi_host_template aic7xxx_driver_template = { 779 .module = THIS_MODULE, 780 .name = "aic7xxx", 781 .proc_name = "aic7xxx", 782 .proc_info = ahc_linux_proc_info, 783 .info = ahc_linux_info, 784 .queuecommand = ahc_linux_queue, 785 .eh_abort_handler = ahc_linux_abort, 786 .eh_device_reset_handler = ahc_linux_dev_reset, 787 .eh_bus_reset_handler = ahc_linux_bus_reset, 788 #if defined(__i386__) 789 .bios_param = ahc_linux_biosparam, 790 #endif 791 .can_queue = AHC_MAX_QUEUE, 792 .this_id = -1, 793 .cmd_per_lun = 2, 794 .use_clustering = ENABLE_CLUSTERING, 795 .slave_alloc = ahc_linux_slave_alloc, 796 .slave_configure = ahc_linux_slave_configure, 797 .slave_destroy = ahc_linux_slave_destroy, 798 .target_alloc = ahc_linux_target_alloc, 799 .target_destroy = ahc_linux_target_destroy, 800 }; 801 802 /**************************** Tasklet Handler *********************************/ 803 804 /******************************** Macros **************************************/ 805 #define BUILD_SCSIID(ahc, cmd) \ 806 ((((cmd)->device->id << TID_SHIFT) & TID) \ 807 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \ 808 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB)) 809 810 /******************************** Bus DMA *************************************/ 811 int 812 ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent, 813 bus_size_t alignment, bus_size_t boundary, 814 dma_addr_t lowaddr, dma_addr_t highaddr, 815 bus_dma_filter_t *filter, void *filterarg, 816 bus_size_t maxsize, int nsegments, 817 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 818 { 819 bus_dma_tag_t dmat; 820 821 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT); 822 if (dmat == NULL) 823 return (ENOMEM); 824 825 /* 826 * Linux is very simplistic about DMA memory. For now don't 827 * maintain all specification information. Once Linux supplies 828 * better facilities for doing these operations, or the 829 * needs of this particular driver change, we might need to do 830 * more here. 831 */ 832 dmat->alignment = alignment; 833 dmat->boundary = boundary; 834 dmat->maxsize = maxsize; 835 *ret_tag = dmat; 836 return (0); 837 } 838 839 void 840 ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat) 841 { 842 free(dmat, M_DEVBUF); 843 } 844 845 int 846 ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr, 847 int flags, bus_dmamap_t *mapp) 848 { 849 *vaddr = pci_alloc_consistent(ahc->dev_softc, 850 dmat->maxsize, mapp); 851 if (*vaddr == NULL) 852 return ENOMEM; 853 return 0; 854 } 855 856 void 857 ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat, 858 void* vaddr, bus_dmamap_t map) 859 { 860 pci_free_consistent(ahc->dev_softc, dmat->maxsize, 861 vaddr, map); 862 } 863 864 int 865 ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map, 866 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 867 void *cb_arg, int flags) 868 { 869 /* 870 * Assume for now that this will only be used during 871 * initialization and not for per-transaction buffer mapping. 872 */ 873 bus_dma_segment_t stack_sg; 874 875 stack_sg.ds_addr = map; 876 stack_sg.ds_len = dmat->maxsize; 877 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 878 return (0); 879 } 880 881 void 882 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 883 { 884 } 885 886 int 887 ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 888 { 889 /* Nothing to do */ 890 return (0); 891 } 892 893 static void 894 ahc_linux_setup_tag_info_global(char *p) 895 { 896 int tags, i, j; 897 898 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 899 printf("Setting Global Tags= %d\n", tags); 900 901 for (i = 0; i < NUM_ELEMENTS(aic7xxx_tag_info); i++) { 902 for (j = 0; j < AHC_NUM_TARGETS; j++) { 903 aic7xxx_tag_info[i].tag_commands[j] = tags; 904 } 905 } 906 } 907 908 static void 909 ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 910 { 911 912 if ((instance >= 0) && (targ >= 0) 913 && (instance < NUM_ELEMENTS(aic7xxx_tag_info)) 914 && (targ < AHC_NUM_TARGETS)) { 915 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff; 916 if (bootverbose) 917 printf("tag_info[%d:%d] = %d\n", instance, targ, value); 918 } 919 } 920 921 /* 922 * Handle Linux boot parameters. This routine allows for assigning a value 923 * to a parameter with a ':' between the parameter and the value. 924 * ie. aic7xxx=stpwlev:1,extended 925 */ 926 static int 927 aic7xxx_setup(char *s) 928 { 929 int i, n; 930 char *p; 931 char *end; 932 933 static struct { 934 const char *name; 935 uint32_t *flag; 936 } options[] = { 937 { "extended", &aic7xxx_extended }, 938 { "no_reset", &aic7xxx_no_reset }, 939 { "verbose", &aic7xxx_verbose }, 940 { "allow_memio", &aic7xxx_allow_memio}, 941 #ifdef AHC_DEBUG 942 { "debug", &ahc_debug }, 943 #endif 944 { "periodic_otag", &aic7xxx_periodic_otag }, 945 { "pci_parity", &aic7xxx_pci_parity }, 946 { "seltime", &aic7xxx_seltime }, 947 { "tag_info", NULL }, 948 { "global_tag_depth", NULL }, 949 { "dv", NULL } 950 }; 951 952 end = strchr(s, '\0'); 953 954 /* 955 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS 956 * will never be 0 in this case. 957 */ 958 n = 0; 959 960 while ((p = strsep(&s, ",.")) != NULL) { 961 if (*p == '\0') 962 continue; 963 for (i = 0; i < NUM_ELEMENTS(options); i++) { 964 965 n = strlen(options[i].name); 966 if (strncmp(options[i].name, p, n) == 0) 967 break; 968 } 969 if (i == NUM_ELEMENTS(options)) 970 continue; 971 972 if (strncmp(p, "global_tag_depth", n) == 0) { 973 ahc_linux_setup_tag_info_global(p + n); 974 } else if (strncmp(p, "tag_info", n) == 0) { 975 s = aic_parse_brace_option("tag_info", p + n, end, 976 2, ahc_linux_setup_tag_info, 0); 977 } else if (p[n] == ':') { 978 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 979 } else if (strncmp(p, "verbose", n) == 0) { 980 *(options[i].flag) = 1; 981 } else { 982 *(options[i].flag) ^= 0xFFFFFFFF; 983 } 984 } 985 return 1; 986 } 987 988 __setup("aic7xxx=", aic7xxx_setup); 989 990 uint32_t aic7xxx_verbose; 991 992 int 993 ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template) 994 { 995 char buf[80]; 996 struct Scsi_Host *host; 997 char *new_name; 998 u_long s; 999 1000 template->name = ahc->description; 1001 host = scsi_host_alloc(template, sizeof(struct ahc_softc *)); 1002 if (host == NULL) 1003 return (ENOMEM); 1004 1005 *((struct ahc_softc **)host->hostdata) = ahc; 1006 ahc_lock(ahc, &s); 1007 scsi_assign_lock(host, &ahc->platform_data->spin_lock); 1008 ahc->platform_data->host = host; 1009 host->can_queue = AHC_MAX_QUEUE; 1010 host->cmd_per_lun = 2; 1011 /* XXX No way to communicate the ID for multiple channels */ 1012 host->this_id = ahc->our_id; 1013 host->irq = ahc->platform_data->irq; 1014 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8; 1015 host->max_lun = AHC_NUM_LUNS; 1016 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0; 1017 host->sg_tablesize = AHC_NSEG; 1018 ahc_set_unit(ahc, ahc_linux_unit++); 1019 sprintf(buf, "scsi%d", host->host_no); 1020 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); 1021 if (new_name != NULL) { 1022 strcpy(new_name, buf); 1023 ahc_set_name(ahc, new_name); 1024 } 1025 host->unique_id = ahc->unit; 1026 ahc_linux_initialize_scsi_bus(ahc); 1027 ahc_intr_enable(ahc, TRUE); 1028 ahc_unlock(ahc, &s); 1029 1030 host->transportt = ahc_linux_transport_template; 1031 1032 scsi_add_host(host, (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); /* XXX handle failure */ 1033 scsi_scan_host(host); 1034 return (0); 1035 } 1036 1037 uint64_t 1038 ahc_linux_get_memsize(void) 1039 { 1040 struct sysinfo si; 1041 1042 si_meminfo(&si); 1043 return ((uint64_t)si.totalram << PAGE_SHIFT); 1044 } 1045 1046 /* 1047 * Place the SCSI bus into a known state by either resetting it, 1048 * or forcing transfer negotiations on the next command to any 1049 * target. 1050 */ 1051 void 1052 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc) 1053 { 1054 int i; 1055 int numtarg; 1056 1057 i = 0; 1058 numtarg = 0; 1059 1060 if (aic7xxx_no_reset != 0) 1061 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B); 1062 1063 if ((ahc->flags & AHC_RESET_BUS_A) != 0) 1064 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE); 1065 else 1066 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8; 1067 1068 if ((ahc->features & AHC_TWIN) != 0) { 1069 1070 if ((ahc->flags & AHC_RESET_BUS_B) != 0) { 1071 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE); 1072 } else { 1073 if (numtarg == 0) 1074 i = 8; 1075 numtarg += 8; 1076 } 1077 } 1078 1079 /* 1080 * Force negotiation to async for all targets that 1081 * will not see an initial bus reset. 1082 */ 1083 for (; i < numtarg; i++) { 1084 struct ahc_devinfo devinfo; 1085 struct ahc_initiator_tinfo *tinfo; 1086 struct ahc_tmode_tstate *tstate; 1087 u_int our_id; 1088 u_int target_id; 1089 char channel; 1090 1091 channel = 'A'; 1092 our_id = ahc->our_id; 1093 target_id = i; 1094 if (i > 7 && (ahc->features & AHC_TWIN) != 0) { 1095 channel = 'B'; 1096 our_id = ahc->our_id_b; 1097 target_id = i % 8; 1098 } 1099 tinfo = ahc_fetch_transinfo(ahc, channel, our_id, 1100 target_id, &tstate); 1101 ahc_compile_devinfo(&devinfo, our_id, target_id, 1102 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR); 1103 ahc_update_neg_request(ahc, &devinfo, tstate, 1104 tinfo, AHC_NEG_ALWAYS); 1105 } 1106 /* Give the bus some time to recover */ 1107 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) { 1108 ahc_linux_freeze_simq(ahc); 1109 init_timer(&ahc->platform_data->reset_timer); 1110 ahc->platform_data->reset_timer.data = (u_long)ahc; 1111 ahc->platform_data->reset_timer.expires = 1112 jiffies + (AIC7XXX_RESET_DELAY * HZ)/1000; 1113 ahc->platform_data->reset_timer.function = 1114 ahc_linux_release_simq; 1115 add_timer(&ahc->platform_data->reset_timer); 1116 } 1117 } 1118 1119 int 1120 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg) 1121 { 1122 1123 ahc->platform_data = 1124 malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT); 1125 if (ahc->platform_data == NULL) 1126 return (ENOMEM); 1127 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data)); 1128 ahc->platform_data->irq = AHC_LINUX_NOIRQ; 1129 ahc_lockinit(ahc); 1130 init_MUTEX_LOCKED(&ahc->platform_data->eh_sem); 1131 ahc->seltime = (aic7xxx_seltime & 0x3) << 4; 1132 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4; 1133 if (aic7xxx_pci_parity == 0) 1134 ahc->flags |= AHC_DISABLE_PCI_PERR; 1135 1136 return (0); 1137 } 1138 1139 void 1140 ahc_platform_free(struct ahc_softc *ahc) 1141 { 1142 struct scsi_target *starget; 1143 int i, j; 1144 1145 if (ahc->platform_data != NULL) { 1146 if (ahc->platform_data->host != NULL) { 1147 scsi_remove_host(ahc->platform_data->host); 1148 scsi_host_put(ahc->platform_data->host); 1149 } 1150 1151 /* destroy all of the device and target objects */ 1152 for (i = 0; i < AHC_NUM_TARGETS; i++) { 1153 starget = ahc->platform_data->starget[i]; 1154 if (starget != NULL) { 1155 for (j = 0; j < AHC_NUM_LUNS; j++) { 1156 struct ahc_linux_target *targ = 1157 scsi_transport_target_data(starget); 1158 1159 if (targ->sdev[j] == NULL) 1160 continue; 1161 targ->sdev[j] = NULL; 1162 } 1163 ahc->platform_data->starget[i] = NULL; 1164 } 1165 } 1166 1167 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ) 1168 free_irq(ahc->platform_data->irq, ahc); 1169 if (ahc->tag == BUS_SPACE_PIO 1170 && ahc->bsh.ioport != 0) 1171 release_region(ahc->bsh.ioport, 256); 1172 if (ahc->tag == BUS_SPACE_MEMIO 1173 && ahc->bsh.maddr != NULL) { 1174 iounmap(ahc->bsh.maddr); 1175 release_mem_region(ahc->platform_data->mem_busaddr, 1176 0x1000); 1177 } 1178 1179 free(ahc->platform_data, M_DEVBUF); 1180 } 1181 } 1182 1183 void 1184 ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb) 1185 { 1186 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb), 1187 SCB_GET_CHANNEL(ahc, scb), 1188 SCB_GET_LUN(scb), SCB_LIST_NULL, 1189 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1190 } 1191 1192 void 1193 ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, 1194 ahc_queue_alg alg) 1195 { 1196 struct scsi_target *starget; 1197 struct ahc_linux_target *targ; 1198 struct ahc_linux_device *dev; 1199 struct scsi_device *sdev; 1200 u_int target_offset; 1201 int was_queuing; 1202 int now_queuing; 1203 1204 target_offset = devinfo->target; 1205 if (devinfo->channel != 'A') 1206 target_offset += 8; 1207 starget = ahc->platform_data->starget[target_offset]; 1208 targ = scsi_transport_target_data(starget); 1209 BUG_ON(targ == NULL); 1210 sdev = targ->sdev[devinfo->lun]; 1211 if (sdev == NULL) 1212 return; 1213 dev = scsi_transport_device_data(sdev); 1214 1215 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED); 1216 switch (alg) { 1217 default: 1218 case AHC_QUEUE_NONE: 1219 now_queuing = 0; 1220 break; 1221 case AHC_QUEUE_BASIC: 1222 now_queuing = AHC_DEV_Q_BASIC; 1223 break; 1224 case AHC_QUEUE_TAGGED: 1225 now_queuing = AHC_DEV_Q_TAGGED; 1226 break; 1227 } 1228 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0 1229 && (was_queuing != now_queuing) 1230 && (dev->active != 0)) { 1231 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY; 1232 dev->qfrozen++; 1233 } 1234 1235 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG); 1236 if (now_queuing) { 1237 u_int usertags; 1238 1239 usertags = ahc_linux_user_tagdepth(ahc, devinfo); 1240 if (!was_queuing) { 1241 /* 1242 * Start out agressively and allow our 1243 * dynamic queue depth algorithm to take 1244 * care of the rest. 1245 */ 1246 dev->maxtags = usertags; 1247 dev->openings = dev->maxtags - dev->active; 1248 } 1249 if (dev->maxtags == 0) { 1250 /* 1251 * Queueing is disabled by the user. 1252 */ 1253 dev->openings = 1; 1254 } else if (alg == AHC_QUEUE_TAGGED) { 1255 dev->flags |= AHC_DEV_Q_TAGGED; 1256 if (aic7xxx_periodic_otag != 0) 1257 dev->flags |= AHC_DEV_PERIODIC_OTAG; 1258 } else 1259 dev->flags |= AHC_DEV_Q_BASIC; 1260 } else { 1261 /* We can only have one opening. */ 1262 dev->maxtags = 0; 1263 dev->openings = 1 - dev->active; 1264 } 1265 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) { 1266 case AHC_DEV_Q_BASIC: 1267 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); 1268 scsi_activate_tcq(sdev, dev->openings + dev->active); 1269 break; 1270 case AHC_DEV_Q_TAGGED: 1271 scsi_set_tag_type(sdev, MSG_ORDERED_TAG); 1272 scsi_activate_tcq(sdev, dev->openings + dev->active); 1273 break; 1274 default: 1275 /* 1276 * We allow the OS to queue 2 untagged transactions to 1277 * us at any time even though we can only execute them 1278 * serially on the controller/device. This should 1279 * remove some latency. 1280 */ 1281 scsi_deactivate_tcq(sdev, 2); 1282 break; 1283 } 1284 } 1285 1286 int 1287 ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel, 1288 int lun, u_int tag, role_t role, uint32_t status) 1289 { 1290 return 0; 1291 } 1292 1293 static u_int 1294 ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 1295 { 1296 static int warned_user; 1297 u_int tags; 1298 1299 tags = 0; 1300 if ((ahc->user_discenable & devinfo->target_mask) != 0) { 1301 if (ahc->unit >= NUM_ELEMENTS(aic7xxx_tag_info)) { 1302 if (warned_user == 0) { 1303 1304 printf(KERN_WARNING 1305 "aic7xxx: WARNING: Insufficient tag_info instances\n" 1306 "aic7xxx: for installed controllers. Using defaults\n" 1307 "aic7xxx: Please update the aic7xxx_tag_info array in\n" 1308 "aic7xxx: the aic7xxx_osm..c source file.\n"); 1309 warned_user++; 1310 } 1311 tags = AHC_MAX_QUEUE; 1312 } else { 1313 adapter_tag_info_t *tag_info; 1314 1315 tag_info = &aic7xxx_tag_info[ahc->unit]; 1316 tags = tag_info->tag_commands[devinfo->target_offset]; 1317 if (tags > AHC_MAX_QUEUE) 1318 tags = AHC_MAX_QUEUE; 1319 } 1320 } 1321 return (tags); 1322 } 1323 1324 /* 1325 * Determines the queue depth for a given device. 1326 */ 1327 static void 1328 ahc_linux_device_queue_depth(struct scsi_device *sdev) 1329 { 1330 struct ahc_devinfo devinfo; 1331 u_int tags; 1332 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata); 1333 1334 ahc_compile_devinfo(&devinfo, 1335 sdev->sdev_target->channel == 0 1336 ? ahc->our_id : ahc->our_id_b, 1337 sdev->sdev_target->id, sdev->lun, 1338 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1339 ROLE_INITIATOR); 1340 tags = ahc_linux_user_tagdepth(ahc, &devinfo); 1341 if (tags != 0 && sdev->tagged_supported != 0) { 1342 1343 ahc_set_tags(ahc, &devinfo, AHC_QUEUE_TAGGED); 1344 ahc_print_devinfo(ahc, &devinfo); 1345 printf("Tagged Queuing enabled. Depth %d\n", tags); 1346 } else { 1347 ahc_set_tags(ahc, &devinfo, AHC_QUEUE_NONE); 1348 } 1349 } 1350 1351 static int 1352 ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev, 1353 struct scsi_cmnd *cmd) 1354 { 1355 struct scb *scb; 1356 struct hardware_scb *hscb; 1357 struct ahc_initiator_tinfo *tinfo; 1358 struct ahc_tmode_tstate *tstate; 1359 uint16_t mask; 1360 struct scb_tailq *untagged_q = NULL; 1361 1362 /* 1363 * Schedule us to run later. The only reason we are not 1364 * running is because the whole controller Q is frozen. 1365 */ 1366 if (ahc->platform_data->qfrozen != 0) 1367 return SCSI_MLQUEUE_HOST_BUSY; 1368 1369 /* 1370 * We only allow one untagged transaction 1371 * per target in the initiator role unless 1372 * we are storing a full busy target *lun* 1373 * table in SCB space. 1374 */ 1375 if (!blk_rq_tagged(cmd->request) 1376 && (ahc->features & AHC_SCB_BTT) == 0) { 1377 int target_offset; 1378 1379 target_offset = cmd->device->id + cmd->device->channel * 8; 1380 untagged_q = &(ahc->untagged_queues[target_offset]); 1381 if (!TAILQ_EMPTY(untagged_q)) 1382 /* if we're already executing an untagged command 1383 * we're busy to another */ 1384 return SCSI_MLQUEUE_DEVICE_BUSY; 1385 } 1386 1387 /* 1388 * Get an scb to use. 1389 */ 1390 scb = ahc_get_scb(ahc); 1391 if (!scb) 1392 return SCSI_MLQUEUE_HOST_BUSY; 1393 1394 scb->io_ctx = cmd; 1395 scb->platform_data->dev = dev; 1396 hscb = scb->hscb; 1397 cmd->host_scribble = (char *)scb; 1398 1399 /* 1400 * Fill out basics of the HSCB. 1401 */ 1402 hscb->control = 0; 1403 hscb->scsiid = BUILD_SCSIID(ahc, cmd); 1404 hscb->lun = cmd->device->lun; 1405 mask = SCB_GET_TARGET_MASK(ahc, scb); 1406 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb), 1407 SCB_GET_OUR_ID(scb), 1408 SCB_GET_TARGET(ahc, scb), &tstate); 1409 hscb->scsirate = tinfo->scsirate; 1410 hscb->scsioffset = tinfo->curr.offset; 1411 if ((tstate->ultraenb & mask) != 0) 1412 hscb->control |= ULTRAENB; 1413 1414 if ((ahc->user_discenable & mask) != 0) 1415 hscb->control |= DISCENB; 1416 1417 if ((tstate->auto_negotiate & mask) != 0) { 1418 scb->flags |= SCB_AUTO_NEGOTIATE; 1419 scb->hscb->control |= MK_MESSAGE; 1420 } 1421 1422 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) { 1423 int msg_bytes; 1424 uint8_t tag_msgs[2]; 1425 1426 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); 1427 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { 1428 hscb->control |= tag_msgs[0]; 1429 if (tag_msgs[0] == MSG_ORDERED_TASK) 1430 dev->commands_since_idle_or_otag = 0; 1431 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH 1432 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) { 1433 hscb->control |= MSG_ORDERED_TASK; 1434 dev->commands_since_idle_or_otag = 0; 1435 } else { 1436 hscb->control |= MSG_SIMPLE_TASK; 1437 } 1438 } 1439 1440 hscb->cdb_len = cmd->cmd_len; 1441 if (hscb->cdb_len <= 12) { 1442 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len); 1443 } else { 1444 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len); 1445 scb->flags |= SCB_CDB32_PTR; 1446 } 1447 1448 scb->platform_data->xfer_len = 0; 1449 ahc_set_residual(scb, 0); 1450 ahc_set_sense_residual(scb, 0); 1451 scb->sg_count = 0; 1452 if (cmd->use_sg != 0) { 1453 struct ahc_dma_seg *sg; 1454 struct scatterlist *cur_seg; 1455 struct scatterlist *end_seg; 1456 int nseg; 1457 1458 cur_seg = (struct scatterlist *)cmd->request_buffer; 1459 nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg, 1460 cmd->sc_data_direction); 1461 end_seg = cur_seg + nseg; 1462 /* Copy the segments into the SG list. */ 1463 sg = scb->sg_list; 1464 /* 1465 * The sg_count may be larger than nseg if 1466 * a transfer crosses a 32bit page. 1467 */ 1468 while (cur_seg < end_seg) { 1469 dma_addr_t addr; 1470 bus_size_t len; 1471 int consumed; 1472 1473 addr = sg_dma_address(cur_seg); 1474 len = sg_dma_len(cur_seg); 1475 consumed = ahc_linux_map_seg(ahc, scb, 1476 sg, addr, len); 1477 sg += consumed; 1478 scb->sg_count += consumed; 1479 cur_seg++; 1480 } 1481 sg--; 1482 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); 1483 1484 /* 1485 * Reset the sg list pointer. 1486 */ 1487 scb->hscb->sgptr = 1488 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); 1489 1490 /* 1491 * Copy the first SG into the "current" 1492 * data pointer area. 1493 */ 1494 scb->hscb->dataptr = scb->sg_list->addr; 1495 scb->hscb->datacnt = scb->sg_list->len; 1496 } else if (cmd->request_bufflen != 0) { 1497 struct ahc_dma_seg *sg; 1498 dma_addr_t addr; 1499 1500 sg = scb->sg_list; 1501 addr = pci_map_single(ahc->dev_softc, 1502 cmd->request_buffer, 1503 cmd->request_bufflen, 1504 cmd->sc_data_direction); 1505 scb->platform_data->buf_busaddr = addr; 1506 scb->sg_count = ahc_linux_map_seg(ahc, scb, 1507 sg, addr, 1508 cmd->request_bufflen); 1509 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); 1510 1511 /* 1512 * Reset the sg list pointer. 1513 */ 1514 scb->hscb->sgptr = 1515 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); 1516 1517 /* 1518 * Copy the first SG into the "current" 1519 * data pointer area. 1520 */ 1521 scb->hscb->dataptr = sg->addr; 1522 scb->hscb->datacnt = sg->len; 1523 } else { 1524 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL); 1525 scb->hscb->dataptr = 0; 1526 scb->hscb->datacnt = 0; 1527 scb->sg_count = 0; 1528 } 1529 1530 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links); 1531 dev->openings--; 1532 dev->active++; 1533 dev->commands_issued++; 1534 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0) 1535 dev->commands_since_idle_or_otag++; 1536 1537 scb->flags |= SCB_ACTIVE; 1538 if (untagged_q) { 1539 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe); 1540 scb->flags |= SCB_UNTAGGEDQ; 1541 } 1542 ahc_queue_scb(ahc, scb); 1543 return 0; 1544 } 1545 1546 /* 1547 * SCSI controller interrupt handler. 1548 */ 1549 irqreturn_t 1550 ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs) 1551 { 1552 struct ahc_softc *ahc; 1553 u_long flags; 1554 int ours; 1555 1556 ahc = (struct ahc_softc *) dev_id; 1557 ahc_lock(ahc, &flags); 1558 ours = ahc_intr(ahc); 1559 ahc_unlock(ahc, &flags); 1560 return IRQ_RETVAL(ours); 1561 } 1562 1563 void 1564 ahc_platform_flushwork(struct ahc_softc *ahc) 1565 { 1566 1567 } 1568 1569 void 1570 ahc_send_async(struct ahc_softc *ahc, char channel, 1571 u_int target, u_int lun, ac_code code, void *arg) 1572 { 1573 switch (code) { 1574 case AC_TRANSFER_NEG: 1575 { 1576 char buf[80]; 1577 struct scsi_target *starget; 1578 struct ahc_linux_target *targ; 1579 struct info_str info; 1580 struct ahc_initiator_tinfo *tinfo; 1581 struct ahc_tmode_tstate *tstate; 1582 int target_offset; 1583 unsigned int target_ppr_options; 1584 1585 BUG_ON(target == CAM_TARGET_WILDCARD); 1586 1587 info.buffer = buf; 1588 info.length = sizeof(buf); 1589 info.offset = 0; 1590 info.pos = 0; 1591 tinfo = ahc_fetch_transinfo(ahc, channel, 1592 channel == 'A' ? ahc->our_id 1593 : ahc->our_id_b, 1594 target, &tstate); 1595 1596 /* 1597 * Don't bother reporting results while 1598 * negotiations are still pending. 1599 */ 1600 if (tinfo->curr.period != tinfo->goal.period 1601 || tinfo->curr.width != tinfo->goal.width 1602 || tinfo->curr.offset != tinfo->goal.offset 1603 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1604 if (bootverbose == 0) 1605 break; 1606 1607 /* 1608 * Don't bother reporting results that 1609 * are identical to those last reported. 1610 */ 1611 target_offset = target; 1612 if (channel == 'B') 1613 target_offset += 8; 1614 starget = ahc->platform_data->starget[target_offset]; 1615 targ = scsi_transport_target_data(starget); 1616 if (targ == NULL) 1617 break; 1618 1619 target_ppr_options = 1620 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1621 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1622 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0); 1623 1624 if (tinfo->curr.period == spi_period(starget) 1625 && tinfo->curr.width == spi_width(starget) 1626 && tinfo->curr.offset == spi_offset(starget) 1627 && tinfo->curr.ppr_options == target_ppr_options) 1628 if (bootverbose == 0) 1629 break; 1630 1631 spi_period(starget) = tinfo->curr.period; 1632 spi_width(starget) = tinfo->curr.width; 1633 spi_offset(starget) = tinfo->curr.offset; 1634 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1635 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1636 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1637 spi_display_xfer_agreement(starget); 1638 break; 1639 } 1640 case AC_SENT_BDR: 1641 { 1642 WARN_ON(lun != CAM_LUN_WILDCARD); 1643 scsi_report_device_reset(ahc->platform_data->host, 1644 channel - 'A', target); 1645 break; 1646 } 1647 case AC_BUS_RESET: 1648 if (ahc->platform_data->host != NULL) { 1649 scsi_report_bus_reset(ahc->platform_data->host, 1650 channel - 'A'); 1651 } 1652 break; 1653 default: 1654 panic("ahc_send_async: Unexpected async event"); 1655 } 1656 } 1657 1658 /* 1659 * Calls the higher level scsi done function and frees the scb. 1660 */ 1661 void 1662 ahc_done(struct ahc_softc *ahc, struct scb *scb) 1663 { 1664 struct scsi_cmnd *cmd; 1665 struct ahc_linux_device *dev; 1666 1667 LIST_REMOVE(scb, pending_links); 1668 if ((scb->flags & SCB_UNTAGGEDQ) != 0) { 1669 struct scb_tailq *untagged_q; 1670 int target_offset; 1671 1672 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); 1673 untagged_q = &(ahc->untagged_queues[target_offset]); 1674 TAILQ_REMOVE(untagged_q, scb, links.tqe); 1675 BUG_ON(!TAILQ_EMPTY(untagged_q)); 1676 } 1677 1678 if ((scb->flags & SCB_ACTIVE) == 0) { 1679 printf("SCB %d done'd twice\n", scb->hscb->tag); 1680 ahc_dump_card_state(ahc); 1681 panic("Stopping for safety"); 1682 } 1683 cmd = scb->io_ctx; 1684 dev = scb->platform_data->dev; 1685 dev->active--; 1686 dev->openings++; 1687 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1688 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1689 dev->qfrozen--; 1690 } 1691 ahc_linux_unmap_scb(ahc, scb); 1692 1693 /* 1694 * Guard against stale sense data. 1695 * The Linux mid-layer assumes that sense 1696 * was retrieved anytime the first byte of 1697 * the sense buffer looks "sane". 1698 */ 1699 cmd->sense_buffer[0] = 0; 1700 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) { 1701 uint32_t amount_xferred; 1702 1703 amount_xferred = 1704 ahc_get_transfer_length(scb) - ahc_get_residual(scb); 1705 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1706 #ifdef AHC_DEBUG 1707 if ((ahc_debug & AHC_SHOW_MISC) != 0) { 1708 ahc_print_path(ahc, scb); 1709 printf("Set CAM_UNCOR_PARITY\n"); 1710 } 1711 #endif 1712 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY); 1713 #ifdef AHC_REPORT_UNDERFLOWS 1714 /* 1715 * This code is disabled by default as some 1716 * clients of the SCSI system do not properly 1717 * initialize the underflow parameter. This 1718 * results in spurious termination of commands 1719 * that complete as expected (e.g. underflow is 1720 * allowed as command can return variable amounts 1721 * of data. 1722 */ 1723 } else if (amount_xferred < scb->io_ctx->underflow) { 1724 u_int i; 1725 1726 ahc_print_path(ahc, scb); 1727 printf("CDB:"); 1728 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1729 printf(" 0x%x", scb->io_ctx->cmnd[i]); 1730 printf("\n"); 1731 ahc_print_path(ahc, scb); 1732 printf("Saw underflow (%ld of %ld bytes). " 1733 "Treated as error\n", 1734 ahc_get_residual(scb), 1735 ahc_get_transfer_length(scb)); 1736 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1737 #endif 1738 } else { 1739 ahc_set_transaction_status(scb, CAM_REQ_CMP); 1740 } 1741 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1742 ahc_linux_handle_scsi_status(ahc, cmd->device, scb); 1743 } 1744 1745 if (dev->openings == 1 1746 && ahc_get_transaction_status(scb) == CAM_REQ_CMP 1747 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1748 dev->tag_success_count++; 1749 /* 1750 * Some devices deal with temporary internal resource 1751 * shortages by returning queue full. When the queue 1752 * full occurrs, we throttle back. Slowly try to get 1753 * back to our previous queue depth. 1754 */ 1755 if ((dev->openings + dev->active) < dev->maxtags 1756 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) { 1757 dev->tag_success_count = 0; 1758 dev->openings++; 1759 } 1760 1761 if (dev->active == 0) 1762 dev->commands_since_idle_or_otag = 0; 1763 1764 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1765 printf("Recovery SCB completes\n"); 1766 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT 1767 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED) 1768 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1769 if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) { 1770 ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE; 1771 up(&ahc->platform_data->eh_sem); 1772 } 1773 } 1774 1775 ahc_free_scb(ahc, scb); 1776 ahc_linux_queue_cmd_complete(ahc, cmd); 1777 } 1778 1779 static void 1780 ahc_linux_handle_scsi_status(struct ahc_softc *ahc, 1781 struct scsi_device *sdev, struct scb *scb) 1782 { 1783 struct ahc_devinfo devinfo; 1784 struct ahc_linux_device *dev = scsi_transport_device_data(sdev); 1785 1786 ahc_compile_devinfo(&devinfo, 1787 ahc->our_id, 1788 sdev->sdev_target->id, sdev->lun, 1789 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1790 ROLE_INITIATOR); 1791 1792 /* 1793 * We don't currently trust the mid-layer to 1794 * properly deal with queue full or busy. So, 1795 * when one occurs, we tell the mid-layer to 1796 * unconditionally requeue the command to us 1797 * so that we can retry it ourselves. We also 1798 * implement our own throttling mechanism so 1799 * we don't clobber the device with too many 1800 * commands. 1801 */ 1802 switch (ahc_get_scsi_status(scb)) { 1803 default: 1804 break; 1805 case SCSI_STATUS_CHECK_COND: 1806 case SCSI_STATUS_CMD_TERMINATED: 1807 { 1808 struct scsi_cmnd *cmd; 1809 1810 /* 1811 * Copy sense information to the OS's cmd 1812 * structure if it is available. 1813 */ 1814 cmd = scb->io_ctx; 1815 if (scb->flags & SCB_SENSE) { 1816 u_int sense_size; 1817 1818 sense_size = MIN(sizeof(struct scsi_sense_data) 1819 - ahc_get_sense_residual(scb), 1820 sizeof(cmd->sense_buffer)); 1821 memcpy(cmd->sense_buffer, 1822 ahc_get_sense_buf(ahc, scb), sense_size); 1823 if (sense_size < sizeof(cmd->sense_buffer)) 1824 memset(&cmd->sense_buffer[sense_size], 0, 1825 sizeof(cmd->sense_buffer) - sense_size); 1826 cmd->result |= (DRIVER_SENSE << 24); 1827 #ifdef AHC_DEBUG 1828 if (ahc_debug & AHC_SHOW_SENSE) { 1829 int i; 1830 1831 printf("Copied %d bytes of sense data:", 1832 sense_size); 1833 for (i = 0; i < sense_size; i++) { 1834 if ((i & 0xF) == 0) 1835 printf("\n"); 1836 printf("0x%x ", cmd->sense_buffer[i]); 1837 } 1838 printf("\n"); 1839 } 1840 #endif 1841 } 1842 break; 1843 } 1844 case SCSI_STATUS_QUEUE_FULL: 1845 { 1846 /* 1847 * By the time the core driver has returned this 1848 * command, all other commands that were queued 1849 * to us but not the device have been returned. 1850 * This ensures that dev->active is equal to 1851 * the number of commands actually queued to 1852 * the device. 1853 */ 1854 dev->tag_success_count = 0; 1855 if (dev->active != 0) { 1856 /* 1857 * Drop our opening count to the number 1858 * of commands currently outstanding. 1859 */ 1860 dev->openings = 0; 1861 /* 1862 ahc_print_path(ahc, scb); 1863 printf("Dropping tag count to %d\n", dev->active); 1864 */ 1865 if (dev->active == dev->tags_on_last_queuefull) { 1866 1867 dev->last_queuefull_same_count++; 1868 /* 1869 * If we repeatedly see a queue full 1870 * at the same queue depth, this 1871 * device has a fixed number of tag 1872 * slots. Lock in this tag depth 1873 * so we stop seeing queue fulls from 1874 * this device. 1875 */ 1876 if (dev->last_queuefull_same_count 1877 == AHC_LOCK_TAGS_COUNT) { 1878 dev->maxtags = dev->active; 1879 ahc_print_path(ahc, scb); 1880 printf("Locking max tag count at %d\n", 1881 dev->active); 1882 } 1883 } else { 1884 dev->tags_on_last_queuefull = dev->active; 1885 dev->last_queuefull_same_count = 0; 1886 } 1887 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ); 1888 ahc_set_scsi_status(scb, SCSI_STATUS_OK); 1889 ahc_platform_set_tags(ahc, &devinfo, 1890 (dev->flags & AHC_DEV_Q_BASIC) 1891 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1892 break; 1893 } 1894 /* 1895 * Drop down to a single opening, and treat this 1896 * as if the target returned BUSY SCSI status. 1897 */ 1898 dev->openings = 1; 1899 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY); 1900 ahc_platform_set_tags(ahc, &devinfo, 1901 (dev->flags & AHC_DEV_Q_BASIC) 1902 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1903 break; 1904 } 1905 } 1906 } 1907 1908 static void 1909 ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd) 1910 { 1911 /* 1912 * Map CAM error codes into Linux Error codes. We 1913 * avoid the conversion so that the DV code has the 1914 * full error information available when making 1915 * state change decisions. 1916 */ 1917 { 1918 u_int new_status; 1919 1920 switch (ahc_cmd_get_transaction_status(cmd)) { 1921 case CAM_REQ_INPROG: 1922 case CAM_REQ_CMP: 1923 case CAM_SCSI_STATUS_ERROR: 1924 new_status = DID_OK; 1925 break; 1926 case CAM_REQ_ABORTED: 1927 new_status = DID_ABORT; 1928 break; 1929 case CAM_BUSY: 1930 new_status = DID_BUS_BUSY; 1931 break; 1932 case CAM_REQ_INVALID: 1933 case CAM_PATH_INVALID: 1934 new_status = DID_BAD_TARGET; 1935 break; 1936 case CAM_SEL_TIMEOUT: 1937 new_status = DID_NO_CONNECT; 1938 break; 1939 case CAM_SCSI_BUS_RESET: 1940 case CAM_BDR_SENT: 1941 new_status = DID_RESET; 1942 break; 1943 case CAM_UNCOR_PARITY: 1944 new_status = DID_PARITY; 1945 break; 1946 case CAM_CMD_TIMEOUT: 1947 new_status = DID_TIME_OUT; 1948 break; 1949 case CAM_UA_ABORT: 1950 case CAM_REQ_CMP_ERR: 1951 case CAM_AUTOSENSE_FAIL: 1952 case CAM_NO_HBA: 1953 case CAM_DATA_RUN_ERR: 1954 case CAM_UNEXP_BUSFREE: 1955 case CAM_SEQUENCE_FAIL: 1956 case CAM_CCB_LEN_ERR: 1957 case CAM_PROVIDE_FAIL: 1958 case CAM_REQ_TERMIO: 1959 case CAM_UNREC_HBA_ERROR: 1960 case CAM_REQ_TOO_BIG: 1961 new_status = DID_ERROR; 1962 break; 1963 case CAM_REQUEUE_REQ: 1964 new_status = DID_REQUEUE; 1965 break; 1966 default: 1967 /* We should never get here */ 1968 new_status = DID_ERROR; 1969 break; 1970 } 1971 1972 ahc_cmd_set_transaction_status(cmd, new_status); 1973 } 1974 1975 cmd->scsi_done(cmd); 1976 } 1977 1978 static void 1979 ahc_linux_sem_timeout(u_long arg) 1980 { 1981 struct ahc_softc *ahc; 1982 u_long s; 1983 1984 ahc = (struct ahc_softc *)arg; 1985 1986 ahc_lock(ahc, &s); 1987 if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) { 1988 ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE; 1989 up(&ahc->platform_data->eh_sem); 1990 } 1991 ahc_unlock(ahc, &s); 1992 } 1993 1994 static void 1995 ahc_linux_freeze_simq(struct ahc_softc *ahc) 1996 { 1997 ahc->platform_data->qfrozen++; 1998 if (ahc->platform_data->qfrozen == 1) { 1999 scsi_block_requests(ahc->platform_data->host); 2000 2001 /* XXX What about Twin channels? */ 2002 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, 2003 CAM_LUN_WILDCARD, SCB_LIST_NULL, 2004 ROLE_INITIATOR, CAM_REQUEUE_REQ); 2005 } 2006 } 2007 2008 static void 2009 ahc_linux_release_simq(u_long arg) 2010 { 2011 struct ahc_softc *ahc; 2012 u_long s; 2013 int unblock_reqs; 2014 2015 ahc = (struct ahc_softc *)arg; 2016 2017 unblock_reqs = 0; 2018 ahc_lock(ahc, &s); 2019 if (ahc->platform_data->qfrozen > 0) 2020 ahc->platform_data->qfrozen--; 2021 if (ahc->platform_data->qfrozen == 0) 2022 unblock_reqs = 1; 2023 ahc_unlock(ahc, &s); 2024 /* 2025 * There is still a race here. The mid-layer 2026 * should keep its own freeze count and use 2027 * a bottom half handler to run the queues 2028 * so we can unblock with our own lock held. 2029 */ 2030 if (unblock_reqs) 2031 scsi_unblock_requests(ahc->platform_data->host); 2032 } 2033 2034 static int 2035 ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag) 2036 { 2037 struct ahc_softc *ahc; 2038 struct ahc_linux_device *dev; 2039 struct scb *pending_scb; 2040 u_int saved_scbptr; 2041 u_int active_scb_index; 2042 u_int last_phase; 2043 u_int saved_scsiid; 2044 u_int cdb_byte; 2045 int retval; 2046 int was_paused; 2047 int paused; 2048 int wait; 2049 int disconnected; 2050 2051 pending_scb = NULL; 2052 paused = FALSE; 2053 wait = FALSE; 2054 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 2055 2056 printf("%s:%d:%d:%d: Attempting to queue a%s message\n", 2057 ahc_name(ahc), cmd->device->channel, 2058 cmd->device->id, cmd->device->lun, 2059 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET"); 2060 2061 printf("CDB:"); 2062 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2063 printf(" 0x%x", cmd->cmnd[cdb_byte]); 2064 printf("\n"); 2065 2066 spin_lock_irq(&ahc->platform_data->spin_lock); 2067 2068 /* 2069 * First determine if we currently own this command. 2070 * Start by searching the device queue. If not found 2071 * there, check the pending_scb list. If not found 2072 * at all, and the system wanted us to just abort the 2073 * command, return success. 2074 */ 2075 dev = scsi_transport_device_data(cmd->device); 2076 2077 if (dev == NULL) { 2078 /* 2079 * No target device for this command exists, 2080 * so we must not still own the command. 2081 */ 2082 printf("%s:%d:%d:%d: Is not an active device\n", 2083 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2084 cmd->device->lun); 2085 retval = SUCCESS; 2086 goto no_cmd; 2087 } 2088 2089 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0 2090 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id, 2091 cmd->device->channel + 'A', 2092 cmd->device->lun, 2093 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) { 2094 printf("%s:%d:%d:%d: Command found on untagged queue\n", 2095 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2096 cmd->device->lun); 2097 retval = SUCCESS; 2098 goto done; 2099 } 2100 2101 /* 2102 * See if we can find a matching cmd in the pending list. 2103 */ 2104 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2105 if (pending_scb->io_ctx == cmd) 2106 break; 2107 } 2108 2109 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) { 2110 2111 /* Any SCB for this device will do for a target reset */ 2112 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2113 if (ahc_match_scb(ahc, pending_scb, cmd->device->id, 2114 cmd->device->channel + 'A', 2115 CAM_LUN_WILDCARD, 2116 SCB_LIST_NULL, ROLE_INITIATOR) == 0) 2117 break; 2118 } 2119 } 2120 2121 if (pending_scb == NULL) { 2122 printf("%s:%d:%d:%d: Command not found\n", 2123 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2124 cmd->device->lun); 2125 goto no_cmd; 2126 } 2127 2128 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2129 /* 2130 * We can't queue two recovery actions using the same SCB 2131 */ 2132 retval = FAILED; 2133 goto done; 2134 } 2135 2136 /* 2137 * Ensure that the card doesn't do anything 2138 * behind our back and that we didn't "just" miss 2139 * an interrupt that would affect this cmd. 2140 */ 2141 was_paused = ahc_is_paused(ahc); 2142 ahc_pause_and_flushwork(ahc); 2143 paused = TRUE; 2144 2145 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2146 printf("%s:%d:%d:%d: Command already completed\n", 2147 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2148 cmd->device->lun); 2149 goto no_cmd; 2150 } 2151 2152 printf("%s: At time of recovery, card was %spaused\n", 2153 ahc_name(ahc), was_paused ? "" : "not "); 2154 ahc_dump_card_state(ahc); 2155 2156 disconnected = TRUE; 2157 if (flag == SCB_ABORT) { 2158 if (ahc_search_qinfifo(ahc, cmd->device->id, 2159 cmd->device->channel + 'A', 2160 cmd->device->lun, 2161 pending_scb->hscb->tag, 2162 ROLE_INITIATOR, CAM_REQ_ABORTED, 2163 SEARCH_COMPLETE) > 0) { 2164 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2165 ahc_name(ahc), cmd->device->channel, 2166 cmd->device->id, cmd->device->lun); 2167 retval = SUCCESS; 2168 goto done; 2169 } 2170 } else if (ahc_search_qinfifo(ahc, cmd->device->id, 2171 cmd->device->channel + 'A', 2172 cmd->device->lun, pending_scb->hscb->tag, 2173 ROLE_INITIATOR, /*status*/0, 2174 SEARCH_COUNT) > 0) { 2175 disconnected = FALSE; 2176 } 2177 2178 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2179 struct scb *bus_scb; 2180 2181 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG)); 2182 if (bus_scb == pending_scb) 2183 disconnected = FALSE; 2184 else if (flag != SCB_ABORT 2185 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid 2186 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb)) 2187 disconnected = FALSE; 2188 } 2189 2190 /* 2191 * At this point, pending_scb is the scb associated with the 2192 * passed in command. That command is currently active on the 2193 * bus, is in the disconnected state, or we're hoping to find 2194 * a command for the same target active on the bus to abuse to 2195 * send a BDR. Queue the appropriate message based on which of 2196 * these states we are in. 2197 */ 2198 last_phase = ahc_inb(ahc, LASTPHASE); 2199 saved_scbptr = ahc_inb(ahc, SCBPTR); 2200 active_scb_index = ahc_inb(ahc, SCB_TAG); 2201 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); 2202 if (last_phase != P_BUSFREE 2203 && (pending_scb->hscb->tag == active_scb_index 2204 || (flag == SCB_DEVICE_RESET 2205 && SCSIID_TARGET(ahc, saved_scsiid) == cmd->device->id))) { 2206 2207 /* 2208 * We're active on the bus, so assert ATN 2209 * and hope that the target responds. 2210 */ 2211 pending_scb = ahc_lookup_scb(ahc, active_scb_index); 2212 pending_scb->flags |= SCB_RECOVERY_SCB|flag; 2213 ahc_outb(ahc, MSG_OUT, HOST_MSG); 2214 ahc_outb(ahc, SCSISIGO, last_phase|ATNO); 2215 printf("%s:%d:%d:%d: Device is active, asserting ATN\n", 2216 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2217 cmd->device->lun); 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 printf("%s:%d:%d:%d: Unable to deliver message\n", 2284 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2285 cmd->device->lun); 2286 retval = FAILED; 2287 goto done; 2288 } 2289 2290 no_cmd: 2291 /* 2292 * Our assumption is that if we don't have the command, no 2293 * recovery action was required, so we return success. Again, 2294 * the semantics of the mid-layer recovery engine are not 2295 * well defined, so this may change in time. 2296 */ 2297 retval = SUCCESS; 2298 done: 2299 if (paused) 2300 ahc_unpause(ahc); 2301 if (wait) { 2302 struct timer_list timer; 2303 int ret; 2304 2305 ahc->platform_data->flags |= AHC_UP_EH_SEMAPHORE; 2306 spin_unlock_irq(&ahc->platform_data->spin_lock); 2307 init_timer(&timer); 2308 timer.data = (u_long)ahc; 2309 timer.expires = jiffies + (5 * HZ); 2310 timer.function = ahc_linux_sem_timeout; 2311 add_timer(&timer); 2312 printf("Recovery code sleeping\n"); 2313 down(&ahc->platform_data->eh_sem); 2314 printf("Recovery code awake\n"); 2315 ret = del_timer_sync(&timer); 2316 if (ret == 0) { 2317 printf("Timer Expired\n"); 2318 retval = FAILED; 2319 } 2320 spin_lock_irq(&ahc->platform_data->spin_lock); 2321 } 2322 2323 spin_unlock_irq(&ahc->platform_data->spin_lock); 2324 return (retval); 2325 } 2326 2327 void 2328 ahc_platform_dump_card_state(struct ahc_softc *ahc) 2329 { 2330 } 2331 2332 static void ahc_linux_exit(void); 2333 2334 static void ahc_linux_set_width(struct scsi_target *starget, int width) 2335 { 2336 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2337 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2338 struct ahc_devinfo devinfo; 2339 unsigned long flags; 2340 2341 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2342 starget->channel + 'A', ROLE_INITIATOR); 2343 ahc_lock(ahc, &flags); 2344 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE); 2345 ahc_unlock(ahc, &flags); 2346 } 2347 2348 static void ahc_linux_set_period(struct scsi_target *starget, int period) 2349 { 2350 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2351 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2352 struct ahc_tmode_tstate *tstate; 2353 struct ahc_initiator_tinfo *tinfo 2354 = ahc_fetch_transinfo(ahc, 2355 starget->channel + 'A', 2356 shost->this_id, starget->id, &tstate); 2357 struct ahc_devinfo devinfo; 2358 unsigned int ppr_options = tinfo->goal.ppr_options; 2359 unsigned long flags; 2360 unsigned long offset = tinfo->goal.offset; 2361 struct ahc_syncrate *syncrate; 2362 2363 if (offset == 0) 2364 offset = MAX_OFFSET; 2365 2366 if (period < 9) 2367 period = 9; /* 12.5ns is our minimum */ 2368 if (period == 9) 2369 ppr_options |= MSG_EXT_PPR_DT_REQ; 2370 2371 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2372 starget->channel + 'A', ROLE_INITIATOR); 2373 2374 /* all PPR requests apart from QAS require wide transfers */ 2375 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2376 if (spi_width(starget) == 0) 2377 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2378 } 2379 2380 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2381 ahc_lock(ahc, &flags); 2382 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2383 ppr_options, AHC_TRANS_GOAL, FALSE); 2384 ahc_unlock(ahc, &flags); 2385 } 2386 2387 static void ahc_linux_set_offset(struct scsi_target *starget, int offset) 2388 { 2389 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2390 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2391 struct ahc_tmode_tstate *tstate; 2392 struct ahc_initiator_tinfo *tinfo 2393 = ahc_fetch_transinfo(ahc, 2394 starget->channel + 'A', 2395 shost->this_id, starget->id, &tstate); 2396 struct ahc_devinfo devinfo; 2397 unsigned int ppr_options = 0; 2398 unsigned int period = 0; 2399 unsigned long flags; 2400 struct ahc_syncrate *syncrate = NULL; 2401 2402 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2403 starget->channel + 'A', ROLE_INITIATOR); 2404 if (offset != 0) { 2405 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2406 period = tinfo->goal.period; 2407 ppr_options = tinfo->goal.ppr_options; 2408 } 2409 ahc_lock(ahc, &flags); 2410 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2411 ppr_options, AHC_TRANS_GOAL, FALSE); 2412 ahc_unlock(ahc, &flags); 2413 } 2414 2415 static void ahc_linux_set_dt(struct scsi_target *starget, int dt) 2416 { 2417 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2418 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2419 struct ahc_tmode_tstate *tstate; 2420 struct ahc_initiator_tinfo *tinfo 2421 = ahc_fetch_transinfo(ahc, 2422 starget->channel + 'A', 2423 shost->this_id, starget->id, &tstate); 2424 struct ahc_devinfo devinfo; 2425 unsigned int ppr_options = tinfo->goal.ppr_options 2426 & ~MSG_EXT_PPR_DT_REQ; 2427 unsigned int period = tinfo->goal.period; 2428 unsigned int width = tinfo->goal.width; 2429 unsigned long flags; 2430 struct ahc_syncrate *syncrate; 2431 2432 if (dt) { 2433 ppr_options |= MSG_EXT_PPR_DT_REQ; 2434 if (!width) 2435 ahc_linux_set_width(starget, 1); 2436 } else if (period == 9) 2437 period = 10; /* if resetting DT, period must be >= 25ns */ 2438 2439 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2440 starget->channel + 'A', ROLE_INITIATOR); 2441 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT); 2442 ahc_lock(ahc, &flags); 2443 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2444 ppr_options, AHC_TRANS_GOAL, FALSE); 2445 ahc_unlock(ahc, &flags); 2446 } 2447 2448 #if 0 2449 /* FIXME: This code claims to support IU and QAS. However, the actual 2450 * sequencer code and aic7xxx_core have no support for these parameters and 2451 * will get into a bad state if they're negotiated. Do not enable this 2452 * unless you know what you're doing */ 2453 static void ahc_linux_set_qas(struct scsi_target *starget, int qas) 2454 { 2455 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2456 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2457 struct ahc_tmode_tstate *tstate; 2458 struct ahc_initiator_tinfo *tinfo 2459 = ahc_fetch_transinfo(ahc, 2460 starget->channel + 'A', 2461 shost->this_id, starget->id, &tstate); 2462 struct ahc_devinfo devinfo; 2463 unsigned int ppr_options = tinfo->goal.ppr_options 2464 & ~MSG_EXT_PPR_QAS_REQ; 2465 unsigned int period = tinfo->goal.period; 2466 unsigned long flags; 2467 struct ahc_syncrate *syncrate; 2468 2469 if (qas) 2470 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2471 2472 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2473 starget->channel + 'A', ROLE_INITIATOR); 2474 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2475 ahc_lock(ahc, &flags); 2476 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2477 ppr_options, AHC_TRANS_GOAL, FALSE); 2478 ahc_unlock(ahc, &flags); 2479 } 2480 2481 static void ahc_linux_set_iu(struct scsi_target *starget, int iu) 2482 { 2483 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2484 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2485 struct ahc_tmode_tstate *tstate; 2486 struct ahc_initiator_tinfo *tinfo 2487 = ahc_fetch_transinfo(ahc, 2488 starget->channel + 'A', 2489 shost->this_id, starget->id, &tstate); 2490 struct ahc_devinfo devinfo; 2491 unsigned int ppr_options = tinfo->goal.ppr_options 2492 & ~MSG_EXT_PPR_IU_REQ; 2493 unsigned int period = tinfo->goal.period; 2494 unsigned long flags; 2495 struct ahc_syncrate *syncrate; 2496 2497 if (iu) 2498 ppr_options |= MSG_EXT_PPR_IU_REQ; 2499 2500 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2501 starget->channel + 'A', ROLE_INITIATOR); 2502 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2503 ahc_lock(ahc, &flags); 2504 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2505 ppr_options, AHC_TRANS_GOAL, FALSE); 2506 ahc_unlock(ahc, &flags); 2507 } 2508 #endif 2509 2510 static struct spi_function_template ahc_linux_transport_functions = { 2511 .set_offset = ahc_linux_set_offset, 2512 .show_offset = 1, 2513 .set_period = ahc_linux_set_period, 2514 .show_period = 1, 2515 .set_width = ahc_linux_set_width, 2516 .show_width = 1, 2517 .set_dt = ahc_linux_set_dt, 2518 .show_dt = 1, 2519 #if 0 2520 .set_iu = ahc_linux_set_iu, 2521 .show_iu = 1, 2522 .set_qas = ahc_linux_set_qas, 2523 .show_qas = 1, 2524 #endif 2525 }; 2526 2527 2528 2529 static int __init 2530 ahc_linux_init(void) 2531 { 2532 /* 2533 * If we've been passed any parameters, process them now. 2534 */ 2535 if (aic7xxx) 2536 aic7xxx_setup(aic7xxx); 2537 2538 ahc_linux_transport_template = 2539 spi_attach_transport(&ahc_linux_transport_functions); 2540 if (!ahc_linux_transport_template) 2541 return -ENODEV; 2542 2543 scsi_transport_reserve_target(ahc_linux_transport_template, 2544 sizeof(struct ahc_linux_target)); 2545 scsi_transport_reserve_device(ahc_linux_transport_template, 2546 sizeof(struct ahc_linux_device)); 2547 2548 ahc_linux_pci_init(); 2549 ahc_linux_eisa_init(); 2550 return 0; 2551 } 2552 2553 static void 2554 ahc_linux_exit(void) 2555 { 2556 ahc_linux_pci_exit(); 2557 ahc_linux_eisa_exit(); 2558 spi_release_transport(ahc_linux_transport_template); 2559 } 2560 2561 module_init(ahc_linux_init); 2562 module_exit(ahc_linux_exit); 2563