1 2 /* 3 * Adaptec AIC7xxx device driver for Linux. 4 * 5 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $ 6 * 7 * Copyright (c) 1994 John Aycock 8 * The University of Calgary Department of Computer Science. 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2, or (at your option) 13 * any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; see the file COPYING. If not, write to 22 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 23 * 24 * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F 25 * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA 26 * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide, 27 * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux, 28 * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file 29 * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual, 30 * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the 31 * ANSI SCSI-2 specification (draft 10c), ... 32 * 33 * -------------------------------------------------------------------------- 34 * 35 * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org): 36 * 37 * Substantially modified to include support for wide and twin bus 38 * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes, 39 * SCB paging, and other rework of the code. 40 * 41 * -------------------------------------------------------------------------- 42 * Copyright (c) 1994-2000 Justin T. Gibbs. 43 * Copyright (c) 2000-2001 Adaptec Inc. 44 * All rights reserved. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions, and the following disclaimer, 51 * without modification. 52 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 53 * substantially similar to the "NO WARRANTY" disclaimer below 54 * ("Disclaimer") and any redistribution must be conditioned upon 55 * including a substantially similar Disclaimer requirement for further 56 * binary redistribution. 57 * 3. Neither the names of the above-listed copyright holders nor the names 58 * of any contributors may be used to endorse or promote products derived 59 * from this software without specific prior written permission. 60 * 61 * Alternatively, this software may be distributed under the terms of the 62 * GNU General Public License ("GPL") version 2 as published by the Free 63 * Software Foundation. 64 * 65 * NO WARRANTY 66 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 67 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 68 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 69 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 70 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 71 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 72 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 73 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 74 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 75 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 76 * POSSIBILITY OF SUCH DAMAGES. 77 * 78 *--------------------------------------------------------------------------- 79 * 80 * Thanks also go to (in alphabetical order) the following: 81 * 82 * Rory Bolt - Sequencer bug fixes 83 * Jay Estabrook - Initial DEC Alpha support 84 * Doug Ledford - Much needed abort/reset bug fixes 85 * Kai Makisara - DMAing of SCBs 86 * 87 * A Boot time option was also added for not resetting the scsi bus. 88 * 89 * Form: aic7xxx=extended 90 * aic7xxx=no_reset 91 * aic7xxx=verbose 92 * 93 * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97 94 * 95 * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp 96 */ 97 98 /* 99 * Further driver modifications made by Doug Ledford <dledford@redhat.com> 100 * 101 * Copyright (c) 1997-1999 Doug Ledford 102 * 103 * These changes are released under the same licensing terms as the FreeBSD 104 * driver written by Justin Gibbs. Please see his Copyright notice above 105 * for the exact terms and conditions covering my changes as well as the 106 * warranty statement. 107 * 108 * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include 109 * but are not limited to: 110 * 111 * 1: Import of the latest FreeBSD sequencer code for this driver 112 * 2: Modification of kernel code to accommodate different sequencer semantics 113 * 3: Extensive changes throughout kernel portion of driver to improve 114 * abort/reset processing and error hanndling 115 * 4: Other work contributed by various people on the Internet 116 * 5: Changes to printk information and verbosity selection code 117 * 6: General reliability related changes, especially in IRQ management 118 * 7: Modifications to the default probe/attach order for supported cards 119 * 8: SMP friendliness has been improved 120 * 121 */ 122 123 #include "aic7xxx_osm.h" 124 #include "aic7xxx_inline.h" 125 #include <scsi/scsicam.h> 126 127 static struct scsi_transport_template *ahc_linux_transport_template = NULL; 128 129 #include <linux/init.h> /* __setup */ 130 #include <linux/mm.h> /* For fetching system memory size */ 131 #include <linux/blkdev.h> /* For block_size() */ 132 #include <linux/delay.h> /* For ssleep/msleep */ 133 #include <linux/slab.h> 134 135 136 /* 137 * Set this to the delay in seconds after SCSI bus reset. 138 * Note, we honor this only for the initial bus reset. 139 * The scsi error recovery code performs its own bus settle 140 * delay handling for error recovery actions. 141 */ 142 #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS 143 #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS 144 #else 145 #define AIC7XXX_RESET_DELAY 5000 146 #endif 147 148 /* 149 * To change the default number of tagged transactions allowed per-device, 150 * add a line to the lilo.conf file like: 151 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" 152 * which will result in the first four devices on the first two 153 * controllers being set to a tagged queue depth of 32. 154 * 155 * The tag_commands is an array of 16 to allow for wide and twin adapters. 156 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 157 * for channel 1. 158 */ 159 typedef struct { 160 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */ 161 } adapter_tag_info_t; 162 163 /* 164 * Modify this as you see fit for your system. 165 * 166 * 0 tagged queuing disabled 167 * 1 <= n <= 253 n == max tags ever dispatched. 168 * 169 * The driver will throttle the number of commands dispatched to a 170 * device if it returns queue full. For devices with a fixed maximum 171 * queue depth, the driver will eventually determine this depth and 172 * lock it in (a console message is printed to indicate that a lock 173 * has occurred). On some devices, queue full is returned for a temporary 174 * resource shortage. These devices will return queue full at varying 175 * depths. The driver will throttle back when the queue fulls occur and 176 * attempt to slowly increase the depth over time as the device recovers 177 * from the resource shortage. 178 * 179 * In this example, the first line will disable tagged queueing for all 180 * the devices on the first probed aic7xxx adapter. 181 * 182 * The second line enables tagged queueing with 4 commands/LUN for IDs 183 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the 184 * driver to attempt to use up to 64 tags for ID 1. 185 * 186 * The third line is the same as the first line. 187 * 188 * The fourth line disables tagged queueing for devices 0 and 3. It 189 * enables tagged queueing for the other IDs, with 16 commands/LUN 190 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for 191 * IDs 2, 5-7, and 9-15. 192 */ 193 194 /* 195 * NOTE: The below structure is for reference only, the actual structure 196 * to modify in order to change things is just below this comment block. 197 adapter_tag_info_t aic7xxx_tag_info[] = 198 { 199 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 200 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, 201 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 202 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} 203 }; 204 */ 205 206 #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE 207 #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE 208 #else 209 #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE 210 #endif 211 212 #define AIC7XXX_CONFIGED_TAG_COMMANDS { \ 213 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 214 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 215 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 216 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 217 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 218 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 219 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 220 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \ 221 } 222 223 /* 224 * By default, use the number of commands specified by 225 * the users kernel configuration. 226 */ 227 static adapter_tag_info_t aic7xxx_tag_info[] = 228 { 229 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 230 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 231 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 232 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 233 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 234 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 235 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 236 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 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 }; 246 247 /* 248 * There should be a specific return value for this in scsi.h, but 249 * it seems that most drivers ignore it. 250 */ 251 #define DID_UNDERFLOW DID_ERROR 252 253 void 254 ahc_print_path(struct ahc_softc *ahc, struct scb *scb) 255 { 256 printk("(scsi%d:%c:%d:%d): ", 257 ahc->platform_data->host->host_no, 258 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X', 259 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1, 260 scb != NULL ? SCB_GET_LUN(scb) : -1); 261 } 262 263 /* 264 * XXX - these options apply unilaterally to _all_ 274x/284x/294x 265 * cards in the system. This should be fixed. Exceptions to this 266 * rule are noted in the comments. 267 */ 268 269 /* 270 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This 271 * has no effect on any later resets that might occur due to things like 272 * SCSI bus timeouts. 273 */ 274 static uint32_t aic7xxx_no_reset; 275 276 /* 277 * Should we force EXTENDED translation on a controller. 278 * 0 == Use whatever is in the SEEPROM or default to off 279 * 1 == Use whatever is in the SEEPROM or default to on 280 */ 281 static uint32_t aic7xxx_extended; 282 283 /* 284 * PCI bus parity checking of the Adaptec controllers. This is somewhat 285 * dubious at best. To my knowledge, this option has never actually 286 * solved a PCI parity problem, but on certain machines with broken PCI 287 * chipset configurations where stray PCI transactions with bad parity are 288 * the norm rather than the exception, the error messages can be overwhelming. 289 * It's included in the driver for completeness. 290 * 0 = Shut off PCI parity check 291 * non-0 = reverse polarity pci parity checking 292 */ 293 static uint32_t aic7xxx_pci_parity = ~0; 294 295 /* 296 * There are lots of broken chipsets in the world. Some of them will 297 * violate the PCI spec when we issue byte sized memory writes to our 298 * controller. I/O mapped register access, if allowed by the given 299 * platform, will work in almost all cases. 300 */ 301 uint32_t aic7xxx_allow_memio = ~0; 302 303 /* 304 * So that we can set how long each device is given as a selection timeout. 305 * The table of values goes like this: 306 * 0 - 256ms 307 * 1 - 128ms 308 * 2 - 64ms 309 * 3 - 32ms 310 * We default to 256ms because some older devices need a longer time 311 * to respond to initial selection. 312 */ 313 static uint32_t aic7xxx_seltime; 314 315 /* 316 * Certain devices do not perform any aging on commands. Should the 317 * device be saturated by commands in one portion of the disk, it is 318 * possible for transactions on far away sectors to never be serviced. 319 * To handle these devices, we can periodically send an ordered tag to 320 * force all outstanding transactions to be serviced prior to a new 321 * transaction. 322 */ 323 static uint32_t aic7xxx_periodic_otag; 324 325 /* 326 * Module information and settable options. 327 */ 328 static char *aic7xxx = NULL; 329 330 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>"); 331 MODULE_DESCRIPTION("Adaptec AIC77XX/78XX SCSI Host Bus Adapter driver"); 332 MODULE_LICENSE("Dual BSD/GPL"); 333 MODULE_VERSION(AIC7XXX_DRIVER_VERSION); 334 module_param(aic7xxx, charp, 0444); 335 MODULE_PARM_DESC(aic7xxx, 336 "period-delimited options string:\n" 337 " verbose Enable verbose/diagnostic logging\n" 338 " allow_memio Allow device registers to be memory mapped\n" 339 " debug Bitmask of debug values to enable\n" 340 " no_probe Toggle EISA/VLB controller probing\n" 341 " probe_eisa_vl Toggle EISA/VLB controller probing\n" 342 " no_reset Suppress initial bus resets\n" 343 " extended Enable extended geometry on all controllers\n" 344 " periodic_otag Send an ordered tagged transaction\n" 345 " periodically to prevent tag starvation.\n" 346 " This may be required by some older disk\n" 347 " drives or RAID arrays.\n" 348 " tag_info:<tag_str> Set per-target tag depth\n" 349 " global_tag_depth:<int> Global tag depth for every target\n" 350 " on every bus\n" 351 " seltime:<int> Selection Timeout\n" 352 " (0/256ms,1/128ms,2/64ms,3/32ms)\n" 353 "\n" 354 " Sample modprobe configuration file:\n" 355 " # Toggle EISA/VLB probing\n" 356 " # Set tag depth on Controller 1/Target 1 to 10 tags\n" 357 " # Shorten the selection timeout to 128ms\n" 358 "\n" 359 " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n" 360 ); 361 362 static void ahc_linux_handle_scsi_status(struct ahc_softc *, 363 struct scsi_device *, 364 struct scb *); 365 static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, 366 struct scsi_cmnd *cmd); 367 static void ahc_linux_freeze_simq(struct ahc_softc *ahc); 368 static void ahc_linux_release_simq(struct ahc_softc *ahc); 369 static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag); 370 static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc); 371 static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc, 372 struct ahc_devinfo *devinfo); 373 static void ahc_linux_device_queue_depth(struct scsi_device *); 374 static int ahc_linux_run_command(struct ahc_softc*, 375 struct ahc_linux_device *, 376 struct scsi_cmnd *); 377 static void ahc_linux_setup_tag_info_global(char *p); 378 static int aic7xxx_setup(char *s); 379 380 static int ahc_linux_unit; 381 382 383 /************************** OS Utility Wrappers *******************************/ 384 void 385 ahc_delay(long usec) 386 { 387 /* 388 * udelay on Linux can have problems for 389 * multi-millisecond waits. Wait at most 390 * 1024us per call. 391 */ 392 while (usec > 0) { 393 udelay(usec % 1024); 394 usec -= 1024; 395 } 396 } 397 398 /***************************** Low Level I/O **********************************/ 399 uint8_t 400 ahc_inb(struct ahc_softc * ahc, long port) 401 { 402 uint8_t x; 403 404 if (ahc->tag == BUS_SPACE_MEMIO) { 405 x = readb(ahc->bsh.maddr + port); 406 } else { 407 x = inb(ahc->bsh.ioport + port); 408 } 409 mb(); 410 return (x); 411 } 412 413 void 414 ahc_outb(struct ahc_softc * ahc, long port, uint8_t val) 415 { 416 if (ahc->tag == BUS_SPACE_MEMIO) { 417 writeb(val, ahc->bsh.maddr + port); 418 } else { 419 outb(val, ahc->bsh.ioport + port); 420 } 421 mb(); 422 } 423 424 void 425 ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count) 426 { 427 int i; 428 429 /* 430 * There is probably a more efficient way to do this on Linux 431 * but we don't use this for anything speed critical and this 432 * should work. 433 */ 434 for (i = 0; i < count; i++) 435 ahc_outb(ahc, port, *array++); 436 } 437 438 void 439 ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count) 440 { 441 int i; 442 443 /* 444 * There is probably a more efficient way to do this on Linux 445 * but we don't use this for anything speed critical and this 446 * should work. 447 */ 448 for (i = 0; i < count; i++) 449 *array++ = ahc_inb(ahc, port); 450 } 451 452 /********************************* Inlines ************************************/ 453 static void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*); 454 455 static int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, 456 struct ahc_dma_seg *sg, 457 dma_addr_t addr, bus_size_t len); 458 459 static void 460 ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb) 461 { 462 struct scsi_cmnd *cmd; 463 464 cmd = scb->io_ctx; 465 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE); 466 467 scsi_dma_unmap(cmd); 468 } 469 470 static int 471 ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, 472 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len) 473 { 474 int consumed; 475 476 if ((scb->sg_count + 1) > AHC_NSEG) 477 panic("Too few segs for dma mapping. " 478 "Increase AHC_NSEG\n"); 479 480 consumed = 1; 481 sg->addr = ahc_htole32(addr & 0xFFFFFFFF); 482 scb->platform_data->xfer_len += len; 483 484 if (sizeof(dma_addr_t) > 4 485 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0) 486 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK; 487 488 sg->len = ahc_htole32(len); 489 return (consumed); 490 } 491 492 /* 493 * Return a string describing the driver. 494 */ 495 static const char * 496 ahc_linux_info(struct Scsi_Host *host) 497 { 498 static char buffer[512]; 499 char ahc_info[256]; 500 char *bp; 501 struct ahc_softc *ahc; 502 503 bp = &buffer[0]; 504 ahc = *(struct ahc_softc **)host->hostdata; 505 memset(bp, 0, sizeof(buffer)); 506 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev " AIC7XXX_DRIVER_VERSION "\n" 507 " <"); 508 strcat(bp, ahc->description); 509 strcat(bp, ">\n" 510 " "); 511 ahc_controller_info(ahc, ahc_info); 512 strcat(bp, ahc_info); 513 strcat(bp, "\n"); 514 515 return (bp); 516 } 517 518 /* 519 * Queue an SCB to the controller. 520 */ 521 static int 522 ahc_linux_queue_lck(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *)) 523 { 524 struct ahc_softc *ahc; 525 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device); 526 int rtn = SCSI_MLQUEUE_HOST_BUSY; 527 unsigned long flags; 528 529 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 530 531 ahc_lock(ahc, &flags); 532 if (ahc->platform_data->qfrozen == 0) { 533 cmd->scsi_done = scsi_done; 534 cmd->result = CAM_REQ_INPROG << 16; 535 rtn = ahc_linux_run_command(ahc, dev, cmd); 536 } 537 ahc_unlock(ahc, &flags); 538 539 return rtn; 540 } 541 542 static DEF_SCSI_QCMD(ahc_linux_queue) 543 544 static inline struct scsi_target ** 545 ahc_linux_target_in_softc(struct scsi_target *starget) 546 { 547 struct ahc_softc *ahc = 548 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); 549 unsigned int target_offset; 550 551 target_offset = starget->id; 552 if (starget->channel != 0) 553 target_offset += 8; 554 555 return &ahc->platform_data->starget[target_offset]; 556 } 557 558 static int 559 ahc_linux_target_alloc(struct scsi_target *starget) 560 { 561 struct ahc_softc *ahc = 562 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); 563 struct seeprom_config *sc = ahc->seep_config; 564 unsigned long flags; 565 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); 566 unsigned short scsirate; 567 struct ahc_devinfo devinfo; 568 char channel = starget->channel + 'A'; 569 unsigned int our_id = ahc->our_id; 570 unsigned int target_offset; 571 572 target_offset = starget->id; 573 if (starget->channel != 0) 574 target_offset += 8; 575 576 if (starget->channel) 577 our_id = ahc->our_id_b; 578 579 ahc_lock(ahc, &flags); 580 581 BUG_ON(*ahc_targp != NULL); 582 583 *ahc_targp = starget; 584 585 if (sc) { 586 int maxsync = AHC_SYNCRATE_DT; 587 int ultra = 0; 588 int flags = sc->device_flags[target_offset]; 589 590 if (ahc->flags & AHC_NEWEEPROM_FMT) { 591 if (flags & CFSYNCHISULTRA) 592 ultra = 1; 593 } else if (flags & CFULTRAEN) 594 ultra = 1; 595 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04 596 * change it to ultra=0, CFXFER = 0 */ 597 if(ultra && (flags & CFXFER) == 0x04) { 598 ultra = 0; 599 flags &= ~CFXFER; 600 } 601 602 if ((ahc->features & AHC_ULTRA2) != 0) { 603 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0); 604 } else { 605 scsirate = (flags & CFXFER) << 4; 606 maxsync = ultra ? AHC_SYNCRATE_ULTRA : 607 AHC_SYNCRATE_FAST; 608 } 609 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; 610 if (!(flags & CFSYNCH)) 611 spi_max_offset(starget) = 0; 612 spi_min_period(starget) = 613 ahc_find_period(ahc, scsirate, maxsync); 614 } 615 ahc_compile_devinfo(&devinfo, our_id, starget->id, 616 CAM_LUN_WILDCARD, channel, 617 ROLE_INITIATOR); 618 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0, 619 AHC_TRANS_GOAL, /*paused*/FALSE); 620 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 621 AHC_TRANS_GOAL, /*paused*/FALSE); 622 ahc_unlock(ahc, &flags); 623 624 return 0; 625 } 626 627 static void 628 ahc_linux_target_destroy(struct scsi_target *starget) 629 { 630 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); 631 632 *ahc_targp = NULL; 633 } 634 635 static int 636 ahc_linux_slave_alloc(struct scsi_device *sdev) 637 { 638 struct ahc_softc *ahc = 639 *((struct ahc_softc **)sdev->host->hostdata); 640 struct scsi_target *starget = sdev->sdev_target; 641 struct ahc_linux_device *dev; 642 643 if (bootverbose) 644 printk("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id); 645 646 dev = scsi_transport_device_data(sdev); 647 memset(dev, 0, sizeof(*dev)); 648 649 /* 650 * We start out life using untagged 651 * transactions of which we allow one. 652 */ 653 dev->openings = 1; 654 655 /* 656 * Set maxtags to 0. This will be changed if we 657 * later determine that we are dealing with 658 * a tagged queuing capable device. 659 */ 660 dev->maxtags = 0; 661 662 spi_period(starget) = 0; 663 664 return 0; 665 } 666 667 static int 668 ahc_linux_slave_configure(struct scsi_device *sdev) 669 { 670 if (bootverbose) 671 sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); 672 673 ahc_linux_device_queue_depth(sdev); 674 675 /* Initial Domain Validation */ 676 if (!spi_initial_dv(sdev->sdev_target)) 677 spi_dv_device(sdev); 678 679 return 0; 680 } 681 682 #if defined(__i386__) 683 /* 684 * Return the disk geometry for the given SCSI device. 685 */ 686 static int 687 ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 688 sector_t capacity, int geom[]) 689 { 690 int heads; 691 int sectors; 692 int cylinders; 693 int extended; 694 struct ahc_softc *ahc; 695 u_int channel; 696 697 ahc = *((struct ahc_softc **)sdev->host->hostdata); 698 channel = sdev_channel(sdev); 699 700 if (scsi_partsize(bdev, capacity, geom)) 701 return 0; 702 703 heads = 64; 704 sectors = 32; 705 cylinders = aic_sector_div(capacity, heads, sectors); 706 707 if (aic7xxx_extended != 0) 708 extended = 1; 709 else if (channel == 0) 710 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0; 711 else 712 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0; 713 if (extended && cylinders >= 1024) { 714 heads = 255; 715 sectors = 63; 716 cylinders = aic_sector_div(capacity, heads, sectors); 717 } 718 geom[0] = heads; 719 geom[1] = sectors; 720 geom[2] = cylinders; 721 return (0); 722 } 723 #endif 724 725 /* 726 * Abort the current SCSI command(s). 727 */ 728 static int 729 ahc_linux_abort(struct scsi_cmnd *cmd) 730 { 731 int error; 732 733 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT); 734 if (error != SUCCESS) 735 printk("aic7xxx_abort returns 0x%x\n", error); 736 return (error); 737 } 738 739 /* 740 * Attempt to send a target reset message to the device that timed out. 741 */ 742 static int 743 ahc_linux_dev_reset(struct scsi_cmnd *cmd) 744 { 745 int error; 746 747 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET); 748 if (error != SUCCESS) 749 printk("aic7xxx_dev_reset returns 0x%x\n", error); 750 return (error); 751 } 752 753 /* 754 * Reset the SCSI bus. 755 */ 756 static int 757 ahc_linux_bus_reset(struct scsi_cmnd *cmd) 758 { 759 struct ahc_softc *ahc; 760 int found; 761 unsigned long flags; 762 763 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 764 765 ahc_lock(ahc, &flags); 766 found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A', 767 /*initiate reset*/TRUE); 768 ahc_unlock(ahc, &flags); 769 770 if (bootverbose) 771 printk("%s: SCSI bus reset delivered. " 772 "%d SCBs aborted.\n", ahc_name(ahc), found); 773 774 return SUCCESS; 775 } 776 777 struct scsi_host_template aic7xxx_driver_template = { 778 .module = THIS_MODULE, 779 .name = "aic7xxx", 780 .proc_name = "aic7xxx", 781 .show_info = ahc_linux_show_info, 782 .write_info = ahc_proc_write_seeprom, 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 .max_sectors = 8192, 794 .cmd_per_lun = 2, 795 .slave_alloc = ahc_linux_slave_alloc, 796 .slave_configure = ahc_linux_slave_configure, 797 .target_alloc = ahc_linux_target_alloc, 798 .target_destroy = ahc_linux_target_destroy, 799 }; 800 801 /**************************** Tasklet Handler *********************************/ 802 803 /******************************** Macros **************************************/ 804 #define BUILD_SCSIID(ahc, cmd) \ 805 ((((cmd)->device->id << TID_SHIFT) & TID) \ 806 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \ 807 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB)) 808 809 /******************************** Bus DMA *************************************/ 810 int 811 ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent, 812 bus_size_t alignment, bus_size_t boundary, 813 dma_addr_t lowaddr, dma_addr_t highaddr, 814 bus_dma_filter_t *filter, void *filterarg, 815 bus_size_t maxsize, int nsegments, 816 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 817 { 818 bus_dma_tag_t dmat; 819 820 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC); 821 if (dmat == NULL) 822 return (ENOMEM); 823 824 /* 825 * Linux is very simplistic about DMA memory. For now don't 826 * maintain all specification information. Once Linux supplies 827 * better facilities for doing these operations, or the 828 * needs of this particular driver change, we might need to do 829 * more here. 830 */ 831 dmat->alignment = alignment; 832 dmat->boundary = boundary; 833 dmat->maxsize = maxsize; 834 *ret_tag = dmat; 835 return (0); 836 } 837 838 void 839 ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat) 840 { 841 kfree(dmat); 842 } 843 844 int 845 ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr, 846 int flags, bus_dmamap_t *mapp) 847 { 848 /* XXX: check if we really need the GFP_ATOMIC and unwind this mess! */ 849 *vaddr = dma_alloc_coherent(ahc->dev, dmat->maxsize, mapp, GFP_ATOMIC); 850 if (*vaddr == NULL) 851 return ENOMEM; 852 return 0; 853 } 854 855 void 856 ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat, 857 void* vaddr, bus_dmamap_t map) 858 { 859 dma_free_coherent(ahc->dev, dmat->maxsize, vaddr, map); 860 } 861 862 int 863 ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map, 864 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 865 void *cb_arg, int flags) 866 { 867 /* 868 * Assume for now that this will only be used during 869 * initialization and not for per-transaction buffer mapping. 870 */ 871 bus_dma_segment_t stack_sg; 872 873 stack_sg.ds_addr = map; 874 stack_sg.ds_len = dmat->maxsize; 875 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 876 return (0); 877 } 878 879 void 880 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 881 { 882 } 883 884 int 885 ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 886 { 887 /* Nothing to do */ 888 return (0); 889 } 890 891 static void 892 ahc_linux_setup_tag_info_global(char *p) 893 { 894 int tags, i, j; 895 896 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 897 printk("Setting Global Tags= %d\n", tags); 898 899 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) { 900 for (j = 0; j < AHC_NUM_TARGETS; j++) { 901 aic7xxx_tag_info[i].tag_commands[j] = tags; 902 } 903 } 904 } 905 906 static void 907 ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 908 { 909 910 if ((instance >= 0) && (targ >= 0) 911 && (instance < ARRAY_SIZE(aic7xxx_tag_info)) 912 && (targ < AHC_NUM_TARGETS)) { 913 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff; 914 if (bootverbose) 915 printk("tag_info[%d:%d] = %d\n", instance, targ, value); 916 } 917 } 918 919 static char * 920 ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 921 void (*callback)(u_long, int, int, int32_t), 922 u_long callback_arg) 923 { 924 char *tok_end; 925 char *tok_end2; 926 int i; 927 int instance; 928 int targ; 929 int done; 930 char tok_list[] = {'.', ',', '{', '}', '\0'}; 931 932 /* All options use a ':' name/arg separator */ 933 if (*opt_arg != ':') 934 return (opt_arg); 935 opt_arg++; 936 instance = -1; 937 targ = -1; 938 done = FALSE; 939 /* 940 * Restore separator that may be in 941 * the middle of our option argument. 942 */ 943 tok_end = strchr(opt_arg, '\0'); 944 if (tok_end < end) 945 *tok_end = ','; 946 while (!done) { 947 switch (*opt_arg) { 948 case '{': 949 if (instance == -1) { 950 instance = 0; 951 } else { 952 if (depth > 1) { 953 if (targ == -1) 954 targ = 0; 955 } else { 956 printk("Malformed Option %s\n", 957 opt_name); 958 done = TRUE; 959 } 960 } 961 opt_arg++; 962 break; 963 case '}': 964 if (targ != -1) 965 targ = -1; 966 else if (instance != -1) 967 instance = -1; 968 opt_arg++; 969 break; 970 case ',': 971 case '.': 972 if (instance == -1) 973 done = TRUE; 974 else if (targ >= 0) 975 targ++; 976 else if (instance >= 0) 977 instance++; 978 opt_arg++; 979 break; 980 case '\0': 981 done = TRUE; 982 break; 983 default: 984 tok_end = end; 985 for (i = 0; tok_list[i]; i++) { 986 tok_end2 = strchr(opt_arg, tok_list[i]); 987 if ((tok_end2) && (tok_end2 < tok_end)) 988 tok_end = tok_end2; 989 } 990 callback(callback_arg, instance, targ, 991 simple_strtol(opt_arg, NULL, 0)); 992 opt_arg = tok_end; 993 break; 994 } 995 } 996 return (opt_arg); 997 } 998 999 /* 1000 * Handle Linux boot parameters. This routine allows for assigning a value 1001 * to a parameter with a ':' between the parameter and the value. 1002 * ie. aic7xxx=stpwlev:1,extended 1003 */ 1004 static int 1005 aic7xxx_setup(char *s) 1006 { 1007 int i, n; 1008 char *p; 1009 char *end; 1010 1011 static const struct { 1012 const char *name; 1013 uint32_t *flag; 1014 } options[] = { 1015 { "extended", &aic7xxx_extended }, 1016 { "no_reset", &aic7xxx_no_reset }, 1017 { "verbose", &aic7xxx_verbose }, 1018 { "allow_memio", &aic7xxx_allow_memio}, 1019 #ifdef AHC_DEBUG 1020 { "debug", &ahc_debug }, 1021 #endif 1022 { "periodic_otag", &aic7xxx_periodic_otag }, 1023 { "pci_parity", &aic7xxx_pci_parity }, 1024 { "seltime", &aic7xxx_seltime }, 1025 { "tag_info", NULL }, 1026 { "global_tag_depth", NULL }, 1027 { "dv", NULL } 1028 }; 1029 1030 end = strchr(s, '\0'); 1031 1032 /* 1033 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE 1034 * will never be 0 in this case. 1035 */ 1036 n = 0; 1037 1038 while ((p = strsep(&s, ",.")) != NULL) { 1039 if (*p == '\0') 1040 continue; 1041 for (i = 0; i < ARRAY_SIZE(options); i++) { 1042 1043 n = strlen(options[i].name); 1044 if (strncmp(options[i].name, p, n) == 0) 1045 break; 1046 } 1047 if (i == ARRAY_SIZE(options)) 1048 continue; 1049 1050 if (strncmp(p, "global_tag_depth", n) == 0) { 1051 ahc_linux_setup_tag_info_global(p + n); 1052 } else if (strncmp(p, "tag_info", n) == 0) { 1053 s = ahc_parse_brace_option("tag_info", p + n, end, 1054 2, ahc_linux_setup_tag_info, 0); 1055 } else if (p[n] == ':') { 1056 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1057 } else if (strncmp(p, "verbose", n) == 0) { 1058 *(options[i].flag) = 1; 1059 } else { 1060 *(options[i].flag) ^= 0xFFFFFFFF; 1061 } 1062 } 1063 return 1; 1064 } 1065 1066 __setup("aic7xxx=", aic7xxx_setup); 1067 1068 uint32_t aic7xxx_verbose; 1069 1070 int 1071 ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template) 1072 { 1073 char buf[80]; 1074 struct Scsi_Host *host; 1075 char *new_name; 1076 u_long s; 1077 int retval; 1078 1079 template->name = ahc->description; 1080 host = scsi_host_alloc(template, sizeof(struct ahc_softc *)); 1081 if (host == NULL) 1082 return (ENOMEM); 1083 1084 *((struct ahc_softc **)host->hostdata) = ahc; 1085 ahc->platform_data->host = host; 1086 host->can_queue = AHC_MAX_QUEUE; 1087 host->cmd_per_lun = 2; 1088 /* XXX No way to communicate the ID for multiple channels */ 1089 host->this_id = ahc->our_id; 1090 host->irq = ahc->platform_data->irq; 1091 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8; 1092 host->max_lun = AHC_NUM_LUNS; 1093 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0; 1094 host->sg_tablesize = AHC_NSEG; 1095 ahc_lock(ahc, &s); 1096 ahc_set_unit(ahc, ahc_linux_unit++); 1097 ahc_unlock(ahc, &s); 1098 sprintf(buf, "scsi%d", host->host_no); 1099 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC); 1100 if (new_name != NULL) { 1101 strcpy(new_name, buf); 1102 ahc_set_name(ahc, new_name); 1103 } 1104 host->unique_id = ahc->unit; 1105 ahc_linux_initialize_scsi_bus(ahc); 1106 ahc_intr_enable(ahc, TRUE); 1107 1108 host->transportt = ahc_linux_transport_template; 1109 1110 retval = scsi_add_host(host, ahc->dev); 1111 if (retval) { 1112 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n"); 1113 scsi_host_put(host); 1114 return retval; 1115 } 1116 1117 scsi_scan_host(host); 1118 return 0; 1119 } 1120 1121 /* 1122 * Place the SCSI bus into a known state by either resetting it, 1123 * or forcing transfer negotiations on the next command to any 1124 * target. 1125 */ 1126 static void 1127 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc) 1128 { 1129 int i; 1130 int numtarg; 1131 unsigned long s; 1132 1133 i = 0; 1134 numtarg = 0; 1135 1136 ahc_lock(ahc, &s); 1137 1138 if (aic7xxx_no_reset != 0) 1139 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B); 1140 1141 if ((ahc->flags & AHC_RESET_BUS_A) != 0) 1142 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE); 1143 else 1144 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8; 1145 1146 if ((ahc->features & AHC_TWIN) != 0) { 1147 1148 if ((ahc->flags & AHC_RESET_BUS_B) != 0) { 1149 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE); 1150 } else { 1151 if (numtarg == 0) 1152 i = 8; 1153 numtarg += 8; 1154 } 1155 } 1156 1157 /* 1158 * Force negotiation to async for all targets that 1159 * will not see an initial bus reset. 1160 */ 1161 for (; i < numtarg; i++) { 1162 struct ahc_devinfo devinfo; 1163 struct ahc_initiator_tinfo *tinfo; 1164 struct ahc_tmode_tstate *tstate; 1165 u_int our_id; 1166 u_int target_id; 1167 char channel; 1168 1169 channel = 'A'; 1170 our_id = ahc->our_id; 1171 target_id = i; 1172 if (i > 7 && (ahc->features & AHC_TWIN) != 0) { 1173 channel = 'B'; 1174 our_id = ahc->our_id_b; 1175 target_id = i % 8; 1176 } 1177 tinfo = ahc_fetch_transinfo(ahc, channel, our_id, 1178 target_id, &tstate); 1179 ahc_compile_devinfo(&devinfo, our_id, target_id, 1180 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR); 1181 ahc_update_neg_request(ahc, &devinfo, tstate, 1182 tinfo, AHC_NEG_ALWAYS); 1183 } 1184 ahc_unlock(ahc, &s); 1185 /* Give the bus some time to recover */ 1186 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) { 1187 ahc_linux_freeze_simq(ahc); 1188 msleep(AIC7XXX_RESET_DELAY); 1189 ahc_linux_release_simq(ahc); 1190 } 1191 } 1192 1193 int 1194 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg) 1195 { 1196 1197 ahc->platform_data = 1198 kzalloc(sizeof(struct ahc_platform_data), GFP_ATOMIC); 1199 if (ahc->platform_data == NULL) 1200 return (ENOMEM); 1201 ahc->platform_data->irq = AHC_LINUX_NOIRQ; 1202 ahc_lockinit(ahc); 1203 ahc->seltime = (aic7xxx_seltime & 0x3) << 4; 1204 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4; 1205 if (aic7xxx_pci_parity == 0) 1206 ahc->flags |= AHC_DISABLE_PCI_PERR; 1207 1208 return (0); 1209 } 1210 1211 void 1212 ahc_platform_free(struct ahc_softc *ahc) 1213 { 1214 struct scsi_target *starget; 1215 int i; 1216 1217 if (ahc->platform_data != NULL) { 1218 /* destroy all of the device and target objects */ 1219 for (i = 0; i < AHC_NUM_TARGETS; i++) { 1220 starget = ahc->platform_data->starget[i]; 1221 if (starget != NULL) { 1222 ahc->platform_data->starget[i] = NULL; 1223 } 1224 } 1225 1226 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ) 1227 free_irq(ahc->platform_data->irq, ahc); 1228 if (ahc->tag == BUS_SPACE_PIO 1229 && ahc->bsh.ioport != 0) 1230 release_region(ahc->bsh.ioport, 256); 1231 if (ahc->tag == BUS_SPACE_MEMIO 1232 && ahc->bsh.maddr != NULL) { 1233 iounmap(ahc->bsh.maddr); 1234 release_mem_region(ahc->platform_data->mem_busaddr, 1235 0x1000); 1236 } 1237 1238 if (ahc->platform_data->host) 1239 scsi_host_put(ahc->platform_data->host); 1240 1241 kfree(ahc->platform_data); 1242 } 1243 } 1244 1245 void 1246 ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb) 1247 { 1248 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb), 1249 SCB_GET_CHANNEL(ahc, scb), 1250 SCB_GET_LUN(scb), SCB_LIST_NULL, 1251 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1252 } 1253 1254 void 1255 ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev, 1256 struct ahc_devinfo *devinfo, ahc_queue_alg alg) 1257 { 1258 struct ahc_linux_device *dev; 1259 int was_queuing; 1260 int now_queuing; 1261 1262 if (sdev == NULL) 1263 return; 1264 dev = scsi_transport_device_data(sdev); 1265 1266 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED); 1267 switch (alg) { 1268 default: 1269 case AHC_QUEUE_NONE: 1270 now_queuing = 0; 1271 break; 1272 case AHC_QUEUE_BASIC: 1273 now_queuing = AHC_DEV_Q_BASIC; 1274 break; 1275 case AHC_QUEUE_TAGGED: 1276 now_queuing = AHC_DEV_Q_TAGGED; 1277 break; 1278 } 1279 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0 1280 && (was_queuing != now_queuing) 1281 && (dev->active != 0)) { 1282 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY; 1283 dev->qfrozen++; 1284 } 1285 1286 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG); 1287 if (now_queuing) { 1288 u_int usertags; 1289 1290 usertags = ahc_linux_user_tagdepth(ahc, devinfo); 1291 if (!was_queuing) { 1292 /* 1293 * Start out aggressively and allow our 1294 * dynamic queue depth algorithm to take 1295 * care of the rest. 1296 */ 1297 dev->maxtags = usertags; 1298 dev->openings = dev->maxtags - dev->active; 1299 } 1300 if (dev->maxtags == 0) { 1301 /* 1302 * Queueing is disabled by the user. 1303 */ 1304 dev->openings = 1; 1305 } else if (alg == AHC_QUEUE_TAGGED) { 1306 dev->flags |= AHC_DEV_Q_TAGGED; 1307 if (aic7xxx_periodic_otag != 0) 1308 dev->flags |= AHC_DEV_PERIODIC_OTAG; 1309 } else 1310 dev->flags |= AHC_DEV_Q_BASIC; 1311 } else { 1312 /* We can only have one opening. */ 1313 dev->maxtags = 0; 1314 dev->openings = 1 - dev->active; 1315 } 1316 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) { 1317 case AHC_DEV_Q_BASIC: 1318 case AHC_DEV_Q_TAGGED: 1319 scsi_change_queue_depth(sdev, 1320 dev->openings + dev->active); 1321 break; 1322 default: 1323 /* 1324 * We allow the OS to queue 2 untagged transactions to 1325 * us at any time even though we can only execute them 1326 * serially on the controller/device. This should 1327 * remove some latency. 1328 */ 1329 scsi_change_queue_depth(sdev, 2); 1330 break; 1331 } 1332 } 1333 1334 int 1335 ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel, 1336 int lun, u_int tag, role_t role, uint32_t status) 1337 { 1338 return 0; 1339 } 1340 1341 static u_int 1342 ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 1343 { 1344 static int warned_user; 1345 u_int tags; 1346 1347 tags = 0; 1348 if ((ahc->user_discenable & devinfo->target_mask) != 0) { 1349 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) { 1350 if (warned_user == 0) { 1351 1352 printk(KERN_WARNING 1353 "aic7xxx: WARNING: Insufficient tag_info instances\n" 1354 "aic7xxx: for installed controllers. Using defaults\n" 1355 "aic7xxx: Please update the aic7xxx_tag_info array in\n" 1356 "aic7xxx: the aic7xxx_osm..c source file.\n"); 1357 warned_user++; 1358 } 1359 tags = AHC_MAX_QUEUE; 1360 } else { 1361 adapter_tag_info_t *tag_info; 1362 1363 tag_info = &aic7xxx_tag_info[ahc->unit]; 1364 tags = tag_info->tag_commands[devinfo->target_offset]; 1365 if (tags > AHC_MAX_QUEUE) 1366 tags = AHC_MAX_QUEUE; 1367 } 1368 } 1369 return (tags); 1370 } 1371 1372 /* 1373 * Determines the queue depth for a given device. 1374 */ 1375 static void 1376 ahc_linux_device_queue_depth(struct scsi_device *sdev) 1377 { 1378 struct ahc_devinfo devinfo; 1379 u_int tags; 1380 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata); 1381 1382 ahc_compile_devinfo(&devinfo, 1383 sdev->sdev_target->channel == 0 1384 ? ahc->our_id : ahc->our_id_b, 1385 sdev->sdev_target->id, sdev->lun, 1386 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1387 ROLE_INITIATOR); 1388 tags = ahc_linux_user_tagdepth(ahc, &devinfo); 1389 if (tags != 0 && sdev->tagged_supported != 0) { 1390 1391 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED); 1392 ahc_send_async(ahc, devinfo.channel, devinfo.target, 1393 devinfo.lun, AC_TRANSFER_NEG); 1394 ahc_print_devinfo(ahc, &devinfo); 1395 printk("Tagged Queuing enabled. Depth %d\n", tags); 1396 } else { 1397 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE); 1398 ahc_send_async(ahc, devinfo.channel, devinfo.target, 1399 devinfo.lun, AC_TRANSFER_NEG); 1400 } 1401 } 1402 1403 static int 1404 ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev, 1405 struct scsi_cmnd *cmd) 1406 { 1407 struct scb *scb; 1408 struct hardware_scb *hscb; 1409 struct ahc_initiator_tinfo *tinfo; 1410 struct ahc_tmode_tstate *tstate; 1411 uint16_t mask; 1412 struct scb_tailq *untagged_q = NULL; 1413 int nseg; 1414 1415 /* 1416 * Schedule us to run later. The only reason we are not 1417 * running is because the whole controller Q is frozen. 1418 */ 1419 if (ahc->platform_data->qfrozen != 0) 1420 return SCSI_MLQUEUE_HOST_BUSY; 1421 1422 /* 1423 * We only allow one untagged transaction 1424 * per target in the initiator role unless 1425 * we are storing a full busy target *lun* 1426 * table in SCB space. 1427 */ 1428 if (!(cmd->flags & SCMD_TAGGED) 1429 && (ahc->features & AHC_SCB_BTT) == 0) { 1430 int target_offset; 1431 1432 target_offset = cmd->device->id + cmd->device->channel * 8; 1433 untagged_q = &(ahc->untagged_queues[target_offset]); 1434 if (!TAILQ_EMPTY(untagged_q)) 1435 /* if we're already executing an untagged command 1436 * we're busy to another */ 1437 return SCSI_MLQUEUE_DEVICE_BUSY; 1438 } 1439 1440 nseg = scsi_dma_map(cmd); 1441 if (nseg < 0) 1442 return SCSI_MLQUEUE_HOST_BUSY; 1443 1444 /* 1445 * Get an scb to use. 1446 */ 1447 scb = ahc_get_scb(ahc); 1448 if (!scb) { 1449 scsi_dma_unmap(cmd); 1450 return SCSI_MLQUEUE_HOST_BUSY; 1451 } 1452 1453 scb->io_ctx = cmd; 1454 scb->platform_data->dev = dev; 1455 hscb = scb->hscb; 1456 cmd->host_scribble = (char *)scb; 1457 1458 /* 1459 * Fill out basics of the HSCB. 1460 */ 1461 hscb->control = 0; 1462 hscb->scsiid = BUILD_SCSIID(ahc, cmd); 1463 hscb->lun = cmd->device->lun; 1464 mask = SCB_GET_TARGET_MASK(ahc, scb); 1465 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb), 1466 SCB_GET_OUR_ID(scb), 1467 SCB_GET_TARGET(ahc, scb), &tstate); 1468 hscb->scsirate = tinfo->scsirate; 1469 hscb->scsioffset = tinfo->curr.offset; 1470 if ((tstate->ultraenb & mask) != 0) 1471 hscb->control |= ULTRAENB; 1472 1473 if ((ahc->user_discenable & mask) != 0) 1474 hscb->control |= DISCENB; 1475 1476 if ((tstate->auto_negotiate & mask) != 0) { 1477 scb->flags |= SCB_AUTO_NEGOTIATE; 1478 scb->hscb->control |= MK_MESSAGE; 1479 } 1480 1481 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) { 1482 if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH 1483 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) { 1484 hscb->control |= ORDERED_QUEUE_TAG; 1485 dev->commands_since_idle_or_otag = 0; 1486 } else { 1487 hscb->control |= SIMPLE_QUEUE_TAG; 1488 } 1489 } 1490 1491 hscb->cdb_len = cmd->cmd_len; 1492 if (hscb->cdb_len <= 12) { 1493 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len); 1494 } else { 1495 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len); 1496 scb->flags |= SCB_CDB32_PTR; 1497 } 1498 1499 scb->platform_data->xfer_len = 0; 1500 ahc_set_residual(scb, 0); 1501 ahc_set_sense_residual(scb, 0); 1502 scb->sg_count = 0; 1503 1504 if (nseg > 0) { 1505 struct ahc_dma_seg *sg; 1506 struct scatterlist *cur_seg; 1507 int i; 1508 1509 /* Copy the segments into the SG list. */ 1510 sg = scb->sg_list; 1511 /* 1512 * The sg_count may be larger than nseg if 1513 * a transfer crosses a 32bit page. 1514 */ 1515 scsi_for_each_sg(cmd, cur_seg, nseg, i) { 1516 dma_addr_t addr; 1517 bus_size_t len; 1518 int consumed; 1519 1520 addr = sg_dma_address(cur_seg); 1521 len = sg_dma_len(cur_seg); 1522 consumed = ahc_linux_map_seg(ahc, scb, 1523 sg, addr, len); 1524 sg += consumed; 1525 scb->sg_count += consumed; 1526 } 1527 sg--; 1528 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); 1529 1530 /* 1531 * Reset the sg list pointer. 1532 */ 1533 scb->hscb->sgptr = 1534 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); 1535 1536 /* 1537 * Copy the first SG into the "current" 1538 * data pointer area. 1539 */ 1540 scb->hscb->dataptr = scb->sg_list->addr; 1541 scb->hscb->datacnt = scb->sg_list->len; 1542 } else { 1543 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL); 1544 scb->hscb->dataptr = 0; 1545 scb->hscb->datacnt = 0; 1546 scb->sg_count = 0; 1547 } 1548 1549 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links); 1550 dev->openings--; 1551 dev->active++; 1552 dev->commands_issued++; 1553 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0) 1554 dev->commands_since_idle_or_otag++; 1555 1556 scb->flags |= SCB_ACTIVE; 1557 if (untagged_q) { 1558 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe); 1559 scb->flags |= SCB_UNTAGGEDQ; 1560 } 1561 ahc_queue_scb(ahc, scb); 1562 return 0; 1563 } 1564 1565 /* 1566 * SCSI controller interrupt handler. 1567 */ 1568 irqreturn_t 1569 ahc_linux_isr(int irq, void *dev_id) 1570 { 1571 struct ahc_softc *ahc; 1572 u_long flags; 1573 int ours; 1574 1575 ahc = (struct ahc_softc *) dev_id; 1576 ahc_lock(ahc, &flags); 1577 ours = ahc_intr(ahc); 1578 ahc_unlock(ahc, &flags); 1579 return IRQ_RETVAL(ours); 1580 } 1581 1582 void 1583 ahc_platform_flushwork(struct ahc_softc *ahc) 1584 { 1585 1586 } 1587 1588 void 1589 ahc_send_async(struct ahc_softc *ahc, char channel, 1590 u_int target, u_int lun, ac_code code) 1591 { 1592 switch (code) { 1593 case AC_TRANSFER_NEG: 1594 { 1595 struct scsi_target *starget; 1596 struct ahc_initiator_tinfo *tinfo; 1597 struct ahc_tmode_tstate *tstate; 1598 int target_offset; 1599 unsigned int target_ppr_options; 1600 1601 BUG_ON(target == CAM_TARGET_WILDCARD); 1602 1603 tinfo = ahc_fetch_transinfo(ahc, channel, 1604 channel == 'A' ? ahc->our_id 1605 : ahc->our_id_b, 1606 target, &tstate); 1607 1608 /* 1609 * Don't bother reporting results while 1610 * negotiations are still pending. 1611 */ 1612 if (tinfo->curr.period != tinfo->goal.period 1613 || tinfo->curr.width != tinfo->goal.width 1614 || tinfo->curr.offset != tinfo->goal.offset 1615 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1616 if (bootverbose == 0) 1617 break; 1618 1619 /* 1620 * Don't bother reporting results that 1621 * are identical to those last reported. 1622 */ 1623 target_offset = target; 1624 if (channel == 'B') 1625 target_offset += 8; 1626 starget = ahc->platform_data->starget[target_offset]; 1627 if (starget == NULL) 1628 break; 1629 1630 target_ppr_options = 1631 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1632 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1633 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0); 1634 1635 if (tinfo->curr.period == spi_period(starget) 1636 && tinfo->curr.width == spi_width(starget) 1637 && tinfo->curr.offset == spi_offset(starget) 1638 && tinfo->curr.ppr_options == target_ppr_options) 1639 if (bootverbose == 0) 1640 break; 1641 1642 spi_period(starget) = tinfo->curr.period; 1643 spi_width(starget) = tinfo->curr.width; 1644 spi_offset(starget) = tinfo->curr.offset; 1645 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1646 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1647 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1648 spi_display_xfer_agreement(starget); 1649 break; 1650 } 1651 case AC_SENT_BDR: 1652 { 1653 WARN_ON(lun != CAM_LUN_WILDCARD); 1654 scsi_report_device_reset(ahc->platform_data->host, 1655 channel - 'A', target); 1656 break; 1657 } 1658 case AC_BUS_RESET: 1659 if (ahc->platform_data->host != NULL) { 1660 scsi_report_bus_reset(ahc->platform_data->host, 1661 channel - 'A'); 1662 } 1663 break; 1664 default: 1665 panic("ahc_send_async: Unexpected async event"); 1666 } 1667 } 1668 1669 /* 1670 * Calls the higher level scsi done function and frees the scb. 1671 */ 1672 void 1673 ahc_done(struct ahc_softc *ahc, struct scb *scb) 1674 { 1675 struct scsi_cmnd *cmd; 1676 struct ahc_linux_device *dev; 1677 1678 LIST_REMOVE(scb, pending_links); 1679 if ((scb->flags & SCB_UNTAGGEDQ) != 0) { 1680 struct scb_tailq *untagged_q; 1681 int target_offset; 1682 1683 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); 1684 untagged_q = &(ahc->untagged_queues[target_offset]); 1685 TAILQ_REMOVE(untagged_q, scb, links.tqe); 1686 BUG_ON(!TAILQ_EMPTY(untagged_q)); 1687 } else if ((scb->flags & SCB_ACTIVE) == 0) { 1688 /* 1689 * Transactions aborted from the untagged queue may 1690 * not have been dispatched to the controller, so 1691 * only check the SCB_ACTIVE flag for tagged transactions. 1692 */ 1693 printk("SCB %d done'd twice\n", scb->hscb->tag); 1694 ahc_dump_card_state(ahc); 1695 panic("Stopping for safety"); 1696 } 1697 cmd = scb->io_ctx; 1698 dev = scb->platform_data->dev; 1699 dev->active--; 1700 dev->openings++; 1701 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1702 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1703 dev->qfrozen--; 1704 } 1705 ahc_linux_unmap_scb(ahc, scb); 1706 1707 /* 1708 * Guard against stale sense data. 1709 * The Linux mid-layer assumes that sense 1710 * was retrieved anytime the first byte of 1711 * the sense buffer looks "sane". 1712 */ 1713 cmd->sense_buffer[0] = 0; 1714 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) { 1715 #ifdef AHC_REPORT_UNDERFLOWS 1716 uint32_t amount_xferred; 1717 1718 amount_xferred = 1719 ahc_get_transfer_length(scb) - ahc_get_residual(scb); 1720 #endif 1721 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1722 #ifdef AHC_DEBUG 1723 if ((ahc_debug & AHC_SHOW_MISC) != 0) { 1724 ahc_print_path(ahc, scb); 1725 printk("Set CAM_UNCOR_PARITY\n"); 1726 } 1727 #endif 1728 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY); 1729 #ifdef AHC_REPORT_UNDERFLOWS 1730 /* 1731 * This code is disabled by default as some 1732 * clients of the SCSI system do not properly 1733 * initialize the underflow parameter. This 1734 * results in spurious termination of commands 1735 * that complete as expected (e.g. underflow is 1736 * allowed as command can return variable amounts 1737 * of data. 1738 */ 1739 } else if (amount_xferred < scb->io_ctx->underflow) { 1740 u_int i; 1741 1742 ahc_print_path(ahc, scb); 1743 printk("CDB:"); 1744 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1745 printk(" 0x%x", scb->io_ctx->cmnd[i]); 1746 printk("\n"); 1747 ahc_print_path(ahc, scb); 1748 printk("Saw underflow (%ld of %ld bytes). " 1749 "Treated as error\n", 1750 ahc_get_residual(scb), 1751 ahc_get_transfer_length(scb)); 1752 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1753 #endif 1754 } else { 1755 ahc_set_transaction_status(scb, CAM_REQ_CMP); 1756 } 1757 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1758 ahc_linux_handle_scsi_status(ahc, cmd->device, scb); 1759 } 1760 1761 if (dev->openings == 1 1762 && ahc_get_transaction_status(scb) == CAM_REQ_CMP 1763 && ahc_get_scsi_status(scb) != SAM_STAT_TASK_SET_FULL) 1764 dev->tag_success_count++; 1765 /* 1766 * Some devices deal with temporary internal resource 1767 * shortages by returning queue full. When the queue 1768 * full occurrs, we throttle back. Slowly try to get 1769 * back to our previous queue depth. 1770 */ 1771 if ((dev->openings + dev->active) < dev->maxtags 1772 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) { 1773 dev->tag_success_count = 0; 1774 dev->openings++; 1775 } 1776 1777 if (dev->active == 0) 1778 dev->commands_since_idle_or_otag = 0; 1779 1780 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1781 printk("Recovery SCB completes\n"); 1782 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT 1783 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED) 1784 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1785 1786 if (ahc->platform_data->eh_done) 1787 complete(ahc->platform_data->eh_done); 1788 } 1789 1790 ahc_free_scb(ahc, scb); 1791 ahc_linux_queue_cmd_complete(ahc, cmd); 1792 } 1793 1794 static void 1795 ahc_linux_handle_scsi_status(struct ahc_softc *ahc, 1796 struct scsi_device *sdev, struct scb *scb) 1797 { 1798 struct ahc_devinfo devinfo; 1799 struct ahc_linux_device *dev = scsi_transport_device_data(sdev); 1800 1801 ahc_compile_devinfo(&devinfo, 1802 ahc->our_id, 1803 sdev->sdev_target->id, sdev->lun, 1804 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1805 ROLE_INITIATOR); 1806 1807 /* 1808 * We don't currently trust the mid-layer to 1809 * properly deal with queue full or busy. So, 1810 * when one occurs, we tell the mid-layer to 1811 * unconditionally requeue the command to us 1812 * so that we can retry it ourselves. We also 1813 * implement our own throttling mechanism so 1814 * we don't clobber the device with too many 1815 * commands. 1816 */ 1817 switch (ahc_get_scsi_status(scb)) { 1818 default: 1819 break; 1820 case SAM_STAT_CHECK_CONDITION: 1821 case SAM_STAT_COMMAND_TERMINATED: 1822 { 1823 struct scsi_cmnd *cmd; 1824 1825 /* 1826 * Copy sense information to the OS's cmd 1827 * structure if it is available. 1828 */ 1829 cmd = scb->io_ctx; 1830 if (scb->flags & SCB_SENSE) { 1831 u_int sense_size; 1832 1833 sense_size = min(sizeof(struct scsi_sense_data) 1834 - ahc_get_sense_residual(scb), 1835 (u_long)SCSI_SENSE_BUFFERSIZE); 1836 memcpy(cmd->sense_buffer, 1837 ahc_get_sense_buf(ahc, scb), sense_size); 1838 if (sense_size < SCSI_SENSE_BUFFERSIZE) 1839 memset(&cmd->sense_buffer[sense_size], 0, 1840 SCSI_SENSE_BUFFERSIZE - sense_size); 1841 cmd->result |= (DRIVER_SENSE << 24); 1842 #ifdef AHC_DEBUG 1843 if (ahc_debug & AHC_SHOW_SENSE) { 1844 int i; 1845 1846 printk("Copied %d bytes of sense data:", 1847 sense_size); 1848 for (i = 0; i < sense_size; i++) { 1849 if ((i & 0xF) == 0) 1850 printk("\n"); 1851 printk("0x%x ", cmd->sense_buffer[i]); 1852 } 1853 printk("\n"); 1854 } 1855 #endif 1856 } 1857 break; 1858 } 1859 case SAM_STAT_TASK_SET_FULL: 1860 { 1861 /* 1862 * By the time the core driver has returned this 1863 * command, all other commands that were queued 1864 * to us but not the device have been returned. 1865 * This ensures that dev->active is equal to 1866 * the number of commands actually queued to 1867 * the device. 1868 */ 1869 dev->tag_success_count = 0; 1870 if (dev->active != 0) { 1871 /* 1872 * Drop our opening count to the number 1873 * of commands currently outstanding. 1874 */ 1875 dev->openings = 0; 1876 /* 1877 ahc_print_path(ahc, scb); 1878 printk("Dropping tag count to %d\n", dev->active); 1879 */ 1880 if (dev->active == dev->tags_on_last_queuefull) { 1881 1882 dev->last_queuefull_same_count++; 1883 /* 1884 * If we repeatedly see a queue full 1885 * at the same queue depth, this 1886 * device has a fixed number of tag 1887 * slots. Lock in this tag depth 1888 * so we stop seeing queue fulls from 1889 * this device. 1890 */ 1891 if (dev->last_queuefull_same_count 1892 == AHC_LOCK_TAGS_COUNT) { 1893 dev->maxtags = dev->active; 1894 ahc_print_path(ahc, scb); 1895 printk("Locking max tag count at %d\n", 1896 dev->active); 1897 } 1898 } else { 1899 dev->tags_on_last_queuefull = dev->active; 1900 dev->last_queuefull_same_count = 0; 1901 } 1902 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ); 1903 ahc_set_scsi_status(scb, SAM_STAT_GOOD); 1904 ahc_platform_set_tags(ahc, sdev, &devinfo, 1905 (dev->flags & AHC_DEV_Q_BASIC) 1906 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1907 break; 1908 } 1909 /* 1910 * Drop down to a single opening, and treat this 1911 * as if the target returned BUSY SCSI status. 1912 */ 1913 dev->openings = 1; 1914 ahc_set_scsi_status(scb, SAM_STAT_BUSY); 1915 ahc_platform_set_tags(ahc, sdev, &devinfo, 1916 (dev->flags & AHC_DEV_Q_BASIC) 1917 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1918 break; 1919 } 1920 } 1921 } 1922 1923 static void 1924 ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd) 1925 { 1926 /* 1927 * Map CAM error codes into Linux Error codes. We 1928 * avoid the conversion so that the DV code has the 1929 * full error information available when making 1930 * state change decisions. 1931 */ 1932 { 1933 u_int new_status; 1934 1935 switch (ahc_cmd_get_transaction_status(cmd)) { 1936 case CAM_REQ_INPROG: 1937 case CAM_REQ_CMP: 1938 case CAM_SCSI_STATUS_ERROR: 1939 new_status = DID_OK; 1940 break; 1941 case CAM_REQ_ABORTED: 1942 new_status = DID_ABORT; 1943 break; 1944 case CAM_BUSY: 1945 new_status = DID_BUS_BUSY; 1946 break; 1947 case CAM_REQ_INVALID: 1948 case CAM_PATH_INVALID: 1949 new_status = DID_BAD_TARGET; 1950 break; 1951 case CAM_SEL_TIMEOUT: 1952 new_status = DID_NO_CONNECT; 1953 break; 1954 case CAM_SCSI_BUS_RESET: 1955 case CAM_BDR_SENT: 1956 new_status = DID_RESET; 1957 break; 1958 case CAM_UNCOR_PARITY: 1959 new_status = DID_PARITY; 1960 break; 1961 case CAM_CMD_TIMEOUT: 1962 new_status = DID_TIME_OUT; 1963 break; 1964 case CAM_UA_ABORT: 1965 case CAM_REQ_CMP_ERR: 1966 case CAM_AUTOSENSE_FAIL: 1967 case CAM_NO_HBA: 1968 case CAM_DATA_RUN_ERR: 1969 case CAM_UNEXP_BUSFREE: 1970 case CAM_SEQUENCE_FAIL: 1971 case CAM_CCB_LEN_ERR: 1972 case CAM_PROVIDE_FAIL: 1973 case CAM_REQ_TERMIO: 1974 case CAM_UNREC_HBA_ERROR: 1975 case CAM_REQ_TOO_BIG: 1976 new_status = DID_ERROR; 1977 break; 1978 case CAM_REQUEUE_REQ: 1979 new_status = DID_REQUEUE; 1980 break; 1981 default: 1982 /* We should never get here */ 1983 new_status = DID_ERROR; 1984 break; 1985 } 1986 1987 ahc_cmd_set_transaction_status(cmd, new_status); 1988 } 1989 1990 cmd->scsi_done(cmd); 1991 } 1992 1993 static void 1994 ahc_linux_freeze_simq(struct ahc_softc *ahc) 1995 { 1996 unsigned long s; 1997 1998 ahc_lock(ahc, &s); 1999 ahc->platform_data->qfrozen++; 2000 if (ahc->platform_data->qfrozen == 1) { 2001 scsi_block_requests(ahc->platform_data->host); 2002 2003 /* XXX What about Twin channels? */ 2004 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, 2005 CAM_LUN_WILDCARD, SCB_LIST_NULL, 2006 ROLE_INITIATOR, CAM_REQUEUE_REQ); 2007 } 2008 ahc_unlock(ahc, &s); 2009 } 2010 2011 static void 2012 ahc_linux_release_simq(struct ahc_softc *ahc) 2013 { 2014 u_long s; 2015 int unblock_reqs; 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 unsigned long flags; 2051 2052 pending_scb = NULL; 2053 paused = FALSE; 2054 wait = FALSE; 2055 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 2056 2057 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n", 2058 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET"); 2059 2060 printk("CDB:"); 2061 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2062 printk(" 0x%x", cmd->cmnd[cdb_byte]); 2063 printk("\n"); 2064 2065 ahc_lock(ahc, &flags); 2066 2067 /* 2068 * First determine if we currently own this command. 2069 * Start by searching the device queue. If not found 2070 * there, check the pending_scb list. If not found 2071 * at all, and the system wanted us to just abort the 2072 * command, return success. 2073 */ 2074 dev = scsi_transport_device_data(cmd->device); 2075 2076 if (dev == NULL) { 2077 /* 2078 * No target device for this command exists, 2079 * so we must not still own the command. 2080 */ 2081 printk("%s:%d:%d:%d: Is not an active device\n", 2082 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2083 (u8)cmd->device->lun); 2084 retval = SUCCESS; 2085 goto no_cmd; 2086 } 2087 2088 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0 2089 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id, 2090 cmd->device->channel + 'A', 2091 (u8)cmd->device->lun, 2092 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) { 2093 printk("%s:%d:%d:%d: Command found on untagged queue\n", 2094 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2095 (u8)cmd->device->lun); 2096 retval = SUCCESS; 2097 goto done; 2098 } 2099 2100 /* 2101 * See if we can find a matching cmd in the pending list. 2102 */ 2103 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2104 if (pending_scb->io_ctx == cmd) 2105 break; 2106 } 2107 2108 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) { 2109 2110 /* Any SCB for this device will do for a target reset */ 2111 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2112 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd), 2113 scmd_channel(cmd) + 'A', 2114 CAM_LUN_WILDCARD, 2115 SCB_LIST_NULL, ROLE_INITIATOR)) 2116 break; 2117 } 2118 } 2119 2120 if (pending_scb == NULL) { 2121 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2122 goto no_cmd; 2123 } 2124 2125 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2126 /* 2127 * We can't queue two recovery actions using the same SCB 2128 */ 2129 retval = FAILED; 2130 goto done; 2131 } 2132 2133 /* 2134 * Ensure that the card doesn't do anything 2135 * behind our back and that we didn't "just" miss 2136 * an interrupt that would affect this cmd. 2137 */ 2138 was_paused = ahc_is_paused(ahc); 2139 ahc_pause_and_flushwork(ahc); 2140 paused = TRUE; 2141 2142 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2143 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2144 goto no_cmd; 2145 } 2146 2147 printk("%s: At time of recovery, card was %spaused\n", 2148 ahc_name(ahc), was_paused ? "" : "not "); 2149 ahc_dump_card_state(ahc); 2150 2151 disconnected = TRUE; 2152 if (flag == SCB_ABORT) { 2153 if (ahc_search_qinfifo(ahc, cmd->device->id, 2154 cmd->device->channel + 'A', 2155 cmd->device->lun, 2156 pending_scb->hscb->tag, 2157 ROLE_INITIATOR, CAM_REQ_ABORTED, 2158 SEARCH_COMPLETE) > 0) { 2159 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2160 ahc_name(ahc), cmd->device->channel, 2161 cmd->device->id, (u8)cmd->device->lun); 2162 retval = SUCCESS; 2163 goto done; 2164 } 2165 } else if (ahc_search_qinfifo(ahc, cmd->device->id, 2166 cmd->device->channel + 'A', 2167 cmd->device->lun, 2168 pending_scb->hscb->tag, 2169 ROLE_INITIATOR, /*status*/0, 2170 SEARCH_COUNT) > 0) { 2171 disconnected = FALSE; 2172 } 2173 2174 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2175 struct scb *bus_scb; 2176 2177 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG)); 2178 if (bus_scb == pending_scb) 2179 disconnected = FALSE; 2180 else if (flag != SCB_ABORT 2181 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid 2182 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb)) 2183 disconnected = FALSE; 2184 } 2185 2186 /* 2187 * At this point, pending_scb is the scb associated with the 2188 * passed in command. That command is currently active on the 2189 * bus, is in the disconnected state, or we're hoping to find 2190 * a command for the same target active on the bus to abuse to 2191 * send a BDR. Queue the appropriate message based on which of 2192 * these states we are in. 2193 */ 2194 last_phase = ahc_inb(ahc, LASTPHASE); 2195 saved_scbptr = ahc_inb(ahc, SCBPTR); 2196 active_scb_index = ahc_inb(ahc, SCB_TAG); 2197 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); 2198 if (last_phase != P_BUSFREE 2199 && (pending_scb->hscb->tag == active_scb_index 2200 || (flag == SCB_DEVICE_RESET 2201 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) { 2202 2203 /* 2204 * We're active on the bus, so assert ATN 2205 * and hope that the target responds. 2206 */ 2207 pending_scb = ahc_lookup_scb(ahc, active_scb_index); 2208 pending_scb->flags |= SCB_RECOVERY_SCB|flag; 2209 ahc_outb(ahc, MSG_OUT, HOST_MSG); 2210 ahc_outb(ahc, SCSISIGO, last_phase|ATNO); 2211 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2212 wait = TRUE; 2213 } else if (disconnected) { 2214 2215 /* 2216 * Actually re-queue this SCB in an attempt 2217 * to select the device before it reconnects. 2218 * In either case (selection or reselection), 2219 * we will now issue the approprate message 2220 * to the timed-out device. 2221 * 2222 * Set the MK_MESSAGE control bit indicating 2223 * that we desire to send a message. We 2224 * also set the disconnected flag since 2225 * in the paging case there is no guarantee 2226 * that our SCB control byte matches the 2227 * version on the card. We don't want the 2228 * sequencer to abort the command thinking 2229 * an unsolicited reselection occurred. 2230 */ 2231 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2232 pending_scb->flags |= SCB_RECOVERY_SCB|flag; 2233 2234 /* 2235 * Remove any cached copy of this SCB in the 2236 * disconnected list in preparation for the 2237 * queuing of our abort SCB. We use the 2238 * same element in the SCB, SCB_NEXT, for 2239 * both the qinfifo and the disconnected list. 2240 */ 2241 ahc_search_disc_list(ahc, cmd->device->id, 2242 cmd->device->channel + 'A', 2243 cmd->device->lun, pending_scb->hscb->tag, 2244 /*stop_on_first*/TRUE, 2245 /*remove*/TRUE, 2246 /*save_state*/FALSE); 2247 2248 /* 2249 * In the non-paging case, the sequencer will 2250 * never re-reference the in-core SCB. 2251 * To make sure we are notified during 2252 * reselection, set the MK_MESSAGE flag in 2253 * the card's copy of the SCB. 2254 */ 2255 if ((ahc->flags & AHC_PAGESCBS) == 0) { 2256 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag); 2257 ahc_outb(ahc, SCB_CONTROL, 2258 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE); 2259 } 2260 2261 /* 2262 * Clear out any entries in the QINFIFO first 2263 * so we are the next SCB for this target 2264 * to run. 2265 */ 2266 ahc_search_qinfifo(ahc, cmd->device->id, 2267 cmd->device->channel + 'A', 2268 cmd->device->lun, SCB_LIST_NULL, 2269 ROLE_INITIATOR, CAM_REQUEUE_REQ, 2270 SEARCH_COMPLETE); 2271 ahc_qinfifo_requeue_tail(ahc, pending_scb); 2272 ahc_outb(ahc, SCBPTR, saved_scbptr); 2273 ahc_print_path(ahc, pending_scb); 2274 printk("Device is disconnected, re-queuing SCB\n"); 2275 wait = TRUE; 2276 } else { 2277 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2278 retval = FAILED; 2279 goto done; 2280 } 2281 2282 no_cmd: 2283 /* 2284 * Our assumption is that if we don't have the command, no 2285 * recovery action was required, so we return success. Again, 2286 * the semantics of the mid-layer recovery engine are not 2287 * well defined, so this may change in time. 2288 */ 2289 retval = SUCCESS; 2290 done: 2291 if (paused) 2292 ahc_unpause(ahc); 2293 if (wait) { 2294 DECLARE_COMPLETION_ONSTACK(done); 2295 2296 ahc->platform_data->eh_done = &done; 2297 ahc_unlock(ahc, &flags); 2298 2299 printk("Recovery code sleeping\n"); 2300 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2301 ahc_lock(ahc, &flags); 2302 ahc->platform_data->eh_done = NULL; 2303 ahc_unlock(ahc, &flags); 2304 2305 printk("Timer Expired\n"); 2306 retval = FAILED; 2307 } 2308 printk("Recovery code awake\n"); 2309 } else 2310 ahc_unlock(ahc, &flags); 2311 return (retval); 2312 } 2313 2314 static void ahc_linux_set_width(struct scsi_target *starget, int width) 2315 { 2316 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2317 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2318 struct ahc_devinfo devinfo; 2319 unsigned long flags; 2320 2321 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2322 starget->channel + 'A', ROLE_INITIATOR); 2323 ahc_lock(ahc, &flags); 2324 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE); 2325 ahc_unlock(ahc, &flags); 2326 } 2327 2328 static void ahc_linux_set_period(struct scsi_target *starget, int period) 2329 { 2330 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2331 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2332 struct ahc_tmode_tstate *tstate; 2333 struct ahc_initiator_tinfo *tinfo 2334 = ahc_fetch_transinfo(ahc, 2335 starget->channel + 'A', 2336 shost->this_id, starget->id, &tstate); 2337 struct ahc_devinfo devinfo; 2338 unsigned int ppr_options = tinfo->goal.ppr_options; 2339 unsigned long flags; 2340 unsigned long offset = tinfo->goal.offset; 2341 const struct ahc_syncrate *syncrate; 2342 2343 if (offset == 0) 2344 offset = MAX_OFFSET; 2345 2346 if (period < 9) 2347 period = 9; /* 12.5ns is our minimum */ 2348 if (period == 9) { 2349 if (spi_max_width(starget)) 2350 ppr_options |= MSG_EXT_PPR_DT_REQ; 2351 else 2352 /* need wide for DT and need DT for 12.5 ns */ 2353 period = 10; 2354 } 2355 2356 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2357 starget->channel + 'A', ROLE_INITIATOR); 2358 2359 /* all PPR requests apart from QAS require wide transfers */ 2360 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2361 if (spi_width(starget) == 0) 2362 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2363 } 2364 2365 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, 2366 AHC_SYNCRATE_DT); 2367 ahc_lock(ahc, &flags); 2368 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2369 ppr_options, AHC_TRANS_GOAL, FALSE); 2370 ahc_unlock(ahc, &flags); 2371 } 2372 2373 static void ahc_linux_set_offset(struct scsi_target *starget, int offset) 2374 { 2375 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2376 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2377 struct ahc_tmode_tstate *tstate; 2378 struct ahc_initiator_tinfo *tinfo 2379 = ahc_fetch_transinfo(ahc, 2380 starget->channel + 'A', 2381 shost->this_id, starget->id, &tstate); 2382 struct ahc_devinfo devinfo; 2383 unsigned int ppr_options = 0; 2384 unsigned int period = 0; 2385 unsigned long flags; 2386 const struct ahc_syncrate *syncrate = NULL; 2387 2388 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2389 starget->channel + 'A', ROLE_INITIATOR); 2390 if (offset != 0) { 2391 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, 2392 AHC_SYNCRATE_DT); 2393 period = tinfo->goal.period; 2394 ppr_options = tinfo->goal.ppr_options; 2395 } 2396 ahc_lock(ahc, &flags); 2397 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2398 ppr_options, AHC_TRANS_GOAL, FALSE); 2399 ahc_unlock(ahc, &flags); 2400 } 2401 2402 static void ahc_linux_set_dt(struct scsi_target *starget, int dt) 2403 { 2404 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2405 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2406 struct ahc_tmode_tstate *tstate; 2407 struct ahc_initiator_tinfo *tinfo 2408 = ahc_fetch_transinfo(ahc, 2409 starget->channel + 'A', 2410 shost->this_id, starget->id, &tstate); 2411 struct ahc_devinfo devinfo; 2412 unsigned int ppr_options = tinfo->goal.ppr_options 2413 & ~MSG_EXT_PPR_DT_REQ; 2414 unsigned int period = tinfo->goal.period; 2415 unsigned int width = tinfo->goal.width; 2416 unsigned long flags; 2417 const struct ahc_syncrate *syncrate; 2418 2419 if (dt && spi_max_width(starget)) { 2420 ppr_options |= MSG_EXT_PPR_DT_REQ; 2421 if (!width) 2422 ahc_linux_set_width(starget, 1); 2423 } else if (period == 9) 2424 period = 10; /* if resetting DT, period must be >= 25ns */ 2425 2426 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2427 starget->channel + 'A', ROLE_INITIATOR); 2428 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, 2429 AHC_SYNCRATE_DT); 2430 ahc_lock(ahc, &flags); 2431 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2432 ppr_options, AHC_TRANS_GOAL, FALSE); 2433 ahc_unlock(ahc, &flags); 2434 } 2435 2436 #if 0 2437 /* FIXME: This code claims to support IU and QAS. However, the actual 2438 * sequencer code and aic7xxx_core have no support for these parameters and 2439 * will get into a bad state if they're negotiated. Do not enable this 2440 * unless you know what you're doing */ 2441 static void ahc_linux_set_qas(struct scsi_target *starget, int qas) 2442 { 2443 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2444 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2445 struct ahc_tmode_tstate *tstate; 2446 struct ahc_initiator_tinfo *tinfo 2447 = ahc_fetch_transinfo(ahc, 2448 starget->channel + 'A', 2449 shost->this_id, starget->id, &tstate); 2450 struct ahc_devinfo devinfo; 2451 unsigned int ppr_options = tinfo->goal.ppr_options 2452 & ~MSG_EXT_PPR_QAS_REQ; 2453 unsigned int period = tinfo->goal.period; 2454 unsigned long flags; 2455 struct ahc_syncrate *syncrate; 2456 2457 if (qas) 2458 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2459 2460 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2461 starget->channel + 'A', ROLE_INITIATOR); 2462 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, 2463 AHC_SYNCRATE_DT); 2464 ahc_lock(ahc, &flags); 2465 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2466 ppr_options, AHC_TRANS_GOAL, FALSE); 2467 ahc_unlock(ahc, &flags); 2468 } 2469 2470 static void ahc_linux_set_iu(struct scsi_target *starget, int iu) 2471 { 2472 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2473 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2474 struct ahc_tmode_tstate *tstate; 2475 struct ahc_initiator_tinfo *tinfo 2476 = ahc_fetch_transinfo(ahc, 2477 starget->channel + 'A', 2478 shost->this_id, starget->id, &tstate); 2479 struct ahc_devinfo devinfo; 2480 unsigned int ppr_options = tinfo->goal.ppr_options 2481 & ~MSG_EXT_PPR_IU_REQ; 2482 unsigned int period = tinfo->goal.period; 2483 unsigned long flags; 2484 struct ahc_syncrate *syncrate; 2485 2486 if (iu) 2487 ppr_options |= MSG_EXT_PPR_IU_REQ; 2488 2489 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2490 starget->channel + 'A', ROLE_INITIATOR); 2491 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, 2492 AHC_SYNCRATE_DT); 2493 ahc_lock(ahc, &flags); 2494 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2495 ppr_options, AHC_TRANS_GOAL, FALSE); 2496 ahc_unlock(ahc, &flags); 2497 } 2498 #endif 2499 2500 static void ahc_linux_get_signalling(struct Scsi_Host *shost) 2501 { 2502 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata; 2503 unsigned long flags; 2504 u8 mode; 2505 2506 if (!(ahc->features & AHC_ULTRA2)) { 2507 /* non-LVD chipset, may not have SBLKCTL reg */ 2508 spi_signalling(shost) = 2509 ahc->features & AHC_HVD ? 2510 SPI_SIGNAL_HVD : 2511 SPI_SIGNAL_SE; 2512 return; 2513 } 2514 2515 ahc_lock(ahc, &flags); 2516 ahc_pause(ahc); 2517 mode = ahc_inb(ahc, SBLKCTL); 2518 ahc_unpause(ahc); 2519 ahc_unlock(ahc, &flags); 2520 2521 if (mode & ENAB40) 2522 spi_signalling(shost) = SPI_SIGNAL_LVD; 2523 else if (mode & ENAB20) 2524 spi_signalling(shost) = SPI_SIGNAL_SE; 2525 else 2526 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2527 } 2528 2529 static struct spi_function_template ahc_linux_transport_functions = { 2530 .set_offset = ahc_linux_set_offset, 2531 .show_offset = 1, 2532 .set_period = ahc_linux_set_period, 2533 .show_period = 1, 2534 .set_width = ahc_linux_set_width, 2535 .show_width = 1, 2536 .set_dt = ahc_linux_set_dt, 2537 .show_dt = 1, 2538 #if 0 2539 .set_iu = ahc_linux_set_iu, 2540 .show_iu = 1, 2541 .set_qas = ahc_linux_set_qas, 2542 .show_qas = 1, 2543 #endif 2544 .get_signalling = ahc_linux_get_signalling, 2545 }; 2546 2547 2548 2549 static int __init 2550 ahc_linux_init(void) 2551 { 2552 /* 2553 * If we've been passed any parameters, process them now. 2554 */ 2555 if (aic7xxx) 2556 aic7xxx_setup(aic7xxx); 2557 2558 ahc_linux_transport_template = 2559 spi_attach_transport(&ahc_linux_transport_functions); 2560 if (!ahc_linux_transport_template) 2561 return -ENODEV; 2562 2563 scsi_transport_reserve_device(ahc_linux_transport_template, 2564 sizeof(struct ahc_linux_device)); 2565 2566 ahc_linux_pci_init(); 2567 ahc_linux_eisa_init(); 2568 return 0; 2569 } 2570 2571 static void 2572 ahc_linux_exit(void) 2573 { 2574 ahc_linux_pci_exit(); 2575 ahc_linux_eisa_exit(); 2576 spi_release_transport(ahc_linux_transport_template); 2577 } 2578 2579 module_init(ahc_linux_init); 2580 module_exit(ahc_linux_exit); 2581