1 /* 2 * Adaptec AIC7xxx device driver for Linux. 3 * 4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $ 5 * 6 * Copyright (c) 1994 John Aycock 7 * The University of Calgary Department of Computer Science. 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2, or (at your option) 12 * any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; see the file COPYING. If not, write to 21 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 22 * 23 * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F 24 * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA 25 * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide, 26 * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux, 27 * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file 28 * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual, 29 * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the 30 * ANSI SCSI-2 specification (draft 10c), ... 31 * 32 * -------------------------------------------------------------------------- 33 * 34 * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org): 35 * 36 * Substantially modified to include support for wide and twin bus 37 * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes, 38 * SCB paging, and other rework of the code. 39 * 40 * -------------------------------------------------------------------------- 41 * Copyright (c) 1994-2000 Justin T. Gibbs. 42 * Copyright (c) 2000-2001 Adaptec Inc. 43 * All rights reserved. 44 * 45 * Redistribution and use in source and binary forms, with or without 46 * modification, are permitted provided that the following conditions 47 * are met: 48 * 1. Redistributions of source code must retain the above copyright 49 * notice, this list of conditions, and the following disclaimer, 50 * without modification. 51 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 52 * substantially similar to the "NO WARRANTY" disclaimer below 53 * ("Disclaimer") and any redistribution must be conditioned upon 54 * including a substantially similar Disclaimer requirement for further 55 * binary redistribution. 56 * 3. Neither the names of the above-listed copyright holders nor the names 57 * of any contributors may be used to endorse or promote products derived 58 * from this software without specific prior written permission. 59 * 60 * Alternatively, this software may be distributed under the terms of the 61 * GNU General Public License ("GPL") version 2 as published by the Free 62 * Software Foundation. 63 * 64 * NO WARRANTY 65 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 66 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 67 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 68 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 69 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 70 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 71 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 72 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 73 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 74 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 75 * POSSIBILITY OF SUCH DAMAGES. 76 * 77 *--------------------------------------------------------------------------- 78 * 79 * Thanks also go to (in alphabetical order) the following: 80 * 81 * Rory Bolt - Sequencer bug fixes 82 * Jay Estabrook - Initial DEC Alpha support 83 * Doug Ledford - Much needed abort/reset bug fixes 84 * Kai Makisara - DMAing of SCBs 85 * 86 * A Boot time option was also added for not resetting the scsi bus. 87 * 88 * Form: aic7xxx=extended 89 * aic7xxx=no_reset 90 * aic7xxx=verbose 91 * 92 * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97 93 * 94 * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp 95 */ 96 97 /* 98 * Further driver modifications made by Doug Ledford <dledford@redhat.com> 99 * 100 * Copyright (c) 1997-1999 Doug Ledford 101 * 102 * These changes are released under the same licensing terms as the FreeBSD 103 * driver written by Justin Gibbs. Please see his Copyright notice above 104 * for the exact terms and conditions covering my changes as well as the 105 * warranty statement. 106 * 107 * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include 108 * but are not limited to: 109 * 110 * 1: Import of the latest FreeBSD sequencer code for this driver 111 * 2: Modification of kernel code to accommodate different sequencer semantics 112 * 3: Extensive changes throughout kernel portion of driver to improve 113 * abort/reset processing and error hanndling 114 * 4: Other work contributed by various people on the Internet 115 * 5: Changes to printk information and verbosity selection code 116 * 6: General reliability related changes, especially in IRQ management 117 * 7: Modifications to the default probe/attach order for supported cards 118 * 8: SMP friendliness has been improved 119 * 120 */ 121 122 #include "aic7xxx_osm.h" 123 #include "aic7xxx_inline.h" 124 #include <scsi/scsicam.h> 125 126 static struct scsi_transport_template *ahc_linux_transport_template = NULL; 127 128 #include <linux/init.h> /* __setup */ 129 #include <linux/mm.h> /* For fetching system memory size */ 130 #include <linux/blkdev.h> /* For block_size() */ 131 #include <linux/delay.h> /* For ssleep/msleep */ 132 #include <linux/slab.h> 133 134 135 /* 136 * Set this to the delay in seconds after SCSI bus reset. 137 * Note, we honor this only for the initial bus reset. 138 * The scsi error recovery code performs its own bus settle 139 * delay handling for error recovery actions. 140 */ 141 #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS 142 #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS 143 #else 144 #define AIC7XXX_RESET_DELAY 5000 145 #endif 146 147 /* 148 * To change the default number of tagged transactions allowed per-device, 149 * add a line to the lilo.conf file like: 150 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" 151 * which will result in the first four devices on the first two 152 * controllers being set to a tagged queue depth of 32. 153 * 154 * The tag_commands is an array of 16 to allow for wide and twin adapters. 155 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 156 * for channel 1. 157 */ 158 typedef struct { 159 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */ 160 } adapter_tag_info_t; 161 162 /* 163 * Modify this as you see fit for your system. 164 * 165 * 0 tagged queuing disabled 166 * 1 <= n <= 253 n == max tags ever dispatched. 167 * 168 * The driver will throttle the number of commands dispatched to a 169 * device if it returns queue full. For devices with a fixed maximum 170 * queue depth, the driver will eventually determine this depth and 171 * lock it in (a console message is printed to indicate that a lock 172 * has occurred). On some devices, queue full is returned for a temporary 173 * resource shortage. These devices will return queue full at varying 174 * depths. The driver will throttle back when the queue fulls occur and 175 * attempt to slowly increase the depth over time as the device recovers 176 * from the resource shortage. 177 * 178 * In this example, the first line will disable tagged queueing for all 179 * the devices on the first probed aic7xxx adapter. 180 * 181 * The second line enables tagged queueing with 4 commands/LUN for IDs 182 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the 183 * driver to attempt to use up to 64 tags for ID 1. 184 * 185 * The third line is the same as the first line. 186 * 187 * The fourth line disables tagged queueing for devices 0 and 3. It 188 * enables tagged queueing for the other IDs, with 16 commands/LUN 189 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for 190 * IDs 2, 5-7, and 9-15. 191 */ 192 193 /* 194 * NOTE: The below structure is for reference only, the actual structure 195 * to modify in order to change things is just below this comment block. 196 adapter_tag_info_t aic7xxx_tag_info[] = 197 { 198 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 199 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, 200 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 201 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} 202 }; 203 */ 204 205 #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE 206 #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE 207 #else 208 #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE 209 #endif 210 211 #define AIC7XXX_CONFIGED_TAG_COMMANDS { \ 212 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 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 } 221 222 /* 223 * By default, use the number of commands specified by 224 * the users kernel configuration. 225 */ 226 static adapter_tag_info_t aic7xxx_tag_info[] = 227 { 228 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 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 }; 245 246 /* 247 * There should be a specific return value for this in scsi.h, but 248 * it seems that most drivers ignore it. 249 */ 250 #define DID_UNDERFLOW DID_ERROR 251 252 void 253 ahc_print_path(struct ahc_softc *ahc, struct scb *scb) 254 { 255 printk("(scsi%d:%c:%d:%d): ", 256 ahc->platform_data->host->host_no, 257 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X', 258 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1, 259 scb != NULL ? SCB_GET_LUN(scb) : -1); 260 } 261 262 /* 263 * XXX - these options apply unilaterally to _all_ 274x/284x/294x 264 * cards in the system. This should be fixed. Exceptions to this 265 * rule are noted in the comments. 266 */ 267 268 /* 269 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This 270 * has no effect on any later resets that might occur due to things like 271 * SCSI bus timeouts. 272 */ 273 static uint32_t aic7xxx_no_reset; 274 275 /* 276 * Should we force EXTENDED translation on a controller. 277 * 0 == Use whatever is in the SEEPROM or default to off 278 * 1 == Use whatever is in the SEEPROM or default to on 279 */ 280 static uint32_t aic7xxx_extended; 281 282 /* 283 * PCI bus parity checking of the Adaptec controllers. This is somewhat 284 * dubious at best. To my knowledge, this option has never actually 285 * solved a PCI parity problem, but on certain machines with broken PCI 286 * chipset configurations where stray PCI transactions with bad parity are 287 * the norm rather than the exception, the error messages can be overwhelming. 288 * It's included in the driver for completeness. 289 * 0 = Shut off PCI parity check 290 * non-0 = reverse polarity pci parity checking 291 */ 292 static uint32_t aic7xxx_pci_parity = ~0; 293 294 /* 295 * There are lots of broken chipsets in the world. Some of them will 296 * violate the PCI spec when we issue byte sized memory writes to our 297 * controller. I/O mapped register access, if allowed by the given 298 * platform, will work in almost all cases. 299 */ 300 uint32_t aic7xxx_allow_memio = ~0; 301 302 /* 303 * So that we can set how long each device is given as a selection timeout. 304 * The table of values goes like this: 305 * 0 - 256ms 306 * 1 - 128ms 307 * 2 - 64ms 308 * 3 - 32ms 309 * We default to 256ms because some older devices need a longer time 310 * to respond to initial selection. 311 */ 312 static uint32_t aic7xxx_seltime; 313 314 /* 315 * Certain devices do not perform any aging on commands. Should the 316 * device be saturated by commands in one portion of the disk, it is 317 * possible for transactions on far away sectors to never be serviced. 318 * To handle these devices, we can periodically send an ordered tag to 319 * force all outstanding transactions to be serviced prior to a new 320 * transaction. 321 */ 322 static uint32_t aic7xxx_periodic_otag; 323 324 /* 325 * Module information and settable options. 326 */ 327 static char *aic7xxx = NULL; 328 329 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>"); 330 MODULE_DESCRIPTION("Adaptec AIC77XX/78XX SCSI Host Bus Adapter driver"); 331 MODULE_LICENSE("Dual BSD/GPL"); 332 MODULE_VERSION(AIC7XXX_DRIVER_VERSION); 333 module_param(aic7xxx, charp, 0444); 334 MODULE_PARM_DESC(aic7xxx, 335 "period-delimited options string:\n" 336 " verbose Enable verbose/diagnostic logging\n" 337 " allow_memio Allow device registers to be memory mapped\n" 338 " debug Bitmask of debug values to enable\n" 339 " no_probe Toggle EISA/VLB controller probing\n" 340 " probe_eisa_vl Toggle EISA/VLB controller probing\n" 341 " no_reset Suppress initial bus resets\n" 342 " extended Enable extended geometry on all controllers\n" 343 " periodic_otag Send an ordered tagged transaction\n" 344 " periodically to prevent tag starvation.\n" 345 " This may be required by some older disk\n" 346 " drives or RAID arrays.\n" 347 " tag_info:<tag_str> Set per-target tag depth\n" 348 " global_tag_depth:<int> Global tag depth for every target\n" 349 " on every bus\n" 350 " seltime:<int> Selection Timeout\n" 351 " (0/256ms,1/128ms,2/64ms,3/32ms)\n" 352 "\n" 353 " Sample modprobe configuration file:\n" 354 " # Toggle EISA/VLB probing\n" 355 " # Set tag depth on Controller 1/Target 1 to 10 tags\n" 356 " # Shorten the selection timeout to 128ms\n" 357 "\n" 358 " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n" 359 ); 360 361 static void ahc_linux_handle_scsi_status(struct ahc_softc *, 362 struct scsi_device *, 363 struct scb *); 364 static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, 365 struct scsi_cmnd *cmd); 366 static void ahc_linux_freeze_simq(struct ahc_softc *ahc); 367 static void ahc_linux_release_simq(struct ahc_softc *ahc); 368 static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag); 369 static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc); 370 static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc, 371 struct ahc_devinfo *devinfo); 372 static void ahc_linux_device_queue_depth(struct scsi_device *); 373 static int ahc_linux_run_command(struct ahc_softc*, 374 struct ahc_linux_device *, 375 struct scsi_cmnd *); 376 static void ahc_linux_setup_tag_info_global(char *p); 377 static int aic7xxx_setup(char *s); 378 379 static int ahc_linux_unit; 380 381 382 /************************** OS Utility Wrappers *******************************/ 383 void 384 ahc_delay(long usec) 385 { 386 /* 387 * udelay on Linux can have problems for 388 * multi-millisecond waits. Wait at most 389 * 1024us per call. 390 */ 391 while (usec > 0) { 392 udelay(usec % 1024); 393 usec -= 1024; 394 } 395 } 396 397 /***************************** Low Level I/O **********************************/ 398 uint8_t 399 ahc_inb(struct ahc_softc * ahc, long port) 400 { 401 uint8_t x; 402 403 if (ahc->tag == BUS_SPACE_MEMIO) { 404 x = readb(ahc->bsh.maddr + port); 405 } else { 406 x = inb(ahc->bsh.ioport + port); 407 } 408 mb(); 409 return (x); 410 } 411 412 void 413 ahc_outb(struct ahc_softc * ahc, long port, uint8_t val) 414 { 415 if (ahc->tag == BUS_SPACE_MEMIO) { 416 writeb(val, ahc->bsh.maddr + port); 417 } else { 418 outb(val, ahc->bsh.ioport + port); 419 } 420 mb(); 421 } 422 423 void 424 ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count) 425 { 426 int i; 427 428 /* 429 * There is probably a more efficient way to do this on Linux 430 * but we don't use this for anything speed critical and this 431 * should work. 432 */ 433 for (i = 0; i < count; i++) 434 ahc_outb(ahc, port, *array++); 435 } 436 437 void 438 ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count) 439 { 440 int i; 441 442 /* 443 * There is probably a more efficient way to do this on Linux 444 * but we don't use this for anything speed critical and this 445 * should work. 446 */ 447 for (i = 0; i < count; i++) 448 *array++ = ahc_inb(ahc, port); 449 } 450 451 /********************************* Inlines ************************************/ 452 static void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*); 453 454 static int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, 455 struct ahc_dma_seg *sg, 456 dma_addr_t addr, bus_size_t len); 457 458 static void 459 ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb) 460 { 461 struct scsi_cmnd *cmd; 462 463 cmd = scb->io_ctx; 464 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE); 465 466 scsi_dma_unmap(cmd); 467 } 468 469 static int 470 ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, 471 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len) 472 { 473 int consumed; 474 475 if ((scb->sg_count + 1) > AHC_NSEG) 476 panic("Too few segs for dma mapping. " 477 "Increase AHC_NSEG\n"); 478 479 consumed = 1; 480 sg->addr = ahc_htole32(addr & 0xFFFFFFFF); 481 scb->platform_data->xfer_len += len; 482 483 if (sizeof(dma_addr_t) > 4 484 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0) 485 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK; 486 487 sg->len = ahc_htole32(len); 488 return (consumed); 489 } 490 491 /* 492 * Return a string describing the driver. 493 */ 494 static const char * 495 ahc_linux_info(struct Scsi_Host *host) 496 { 497 static char buffer[512]; 498 char ahc_info[256]; 499 char *bp; 500 struct ahc_softc *ahc; 501 502 bp = &buffer[0]; 503 ahc = *(struct ahc_softc **)host->hostdata; 504 memset(bp, 0, sizeof(buffer)); 505 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev " AIC7XXX_DRIVER_VERSION "\n" 506 " <"); 507 strcat(bp, ahc->description); 508 strcat(bp, ">\n" 509 " "); 510 ahc_controller_info(ahc, ahc_info); 511 strcat(bp, ahc_info); 512 strcat(bp, "\n"); 513 514 return (bp); 515 } 516 517 /* 518 * Queue an SCB to the controller. 519 */ 520 static int 521 ahc_linux_queue_lck(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *)) 522 { 523 struct ahc_softc *ahc; 524 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device); 525 int rtn = SCSI_MLQUEUE_HOST_BUSY; 526 unsigned long flags; 527 528 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 529 530 ahc_lock(ahc, &flags); 531 if (ahc->platform_data->qfrozen == 0) { 532 cmd->scsi_done = scsi_done; 533 cmd->result = CAM_REQ_INPROG << 16; 534 rtn = ahc_linux_run_command(ahc, dev, cmd); 535 } 536 ahc_unlock(ahc, &flags); 537 538 return rtn; 539 } 540 541 static DEF_SCSI_QCMD(ahc_linux_queue) 542 543 static inline struct scsi_target ** 544 ahc_linux_target_in_softc(struct scsi_target *starget) 545 { 546 struct ahc_softc *ahc = 547 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); 548 unsigned int target_offset; 549 550 target_offset = starget->id; 551 if (starget->channel != 0) 552 target_offset += 8; 553 554 return &ahc->platform_data->starget[target_offset]; 555 } 556 557 static int 558 ahc_linux_target_alloc(struct scsi_target *starget) 559 { 560 struct ahc_softc *ahc = 561 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); 562 struct seeprom_config *sc = ahc->seep_config; 563 unsigned long flags; 564 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); 565 unsigned short scsirate; 566 struct ahc_devinfo devinfo; 567 char channel = starget->channel + 'A'; 568 unsigned int our_id = ahc->our_id; 569 unsigned int target_offset; 570 571 target_offset = starget->id; 572 if (starget->channel != 0) 573 target_offset += 8; 574 575 if (starget->channel) 576 our_id = ahc->our_id_b; 577 578 ahc_lock(ahc, &flags); 579 580 BUG_ON(*ahc_targp != NULL); 581 582 *ahc_targp = starget; 583 584 if (sc) { 585 int maxsync = AHC_SYNCRATE_DT; 586 int ultra = 0; 587 int flags = sc->device_flags[target_offset]; 588 589 if (ahc->flags & AHC_NEWEEPROM_FMT) { 590 if (flags & CFSYNCHISULTRA) 591 ultra = 1; 592 } else if (flags & CFULTRAEN) 593 ultra = 1; 594 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04 595 * change it to ultra=0, CFXFER = 0 */ 596 if(ultra && (flags & CFXFER) == 0x04) { 597 ultra = 0; 598 flags &= ~CFXFER; 599 } 600 601 if ((ahc->features & AHC_ULTRA2) != 0) { 602 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0); 603 } else { 604 scsirate = (flags & CFXFER) << 4; 605 maxsync = ultra ? AHC_SYNCRATE_ULTRA : 606 AHC_SYNCRATE_FAST; 607 } 608 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; 609 if (!(flags & CFSYNCH)) 610 spi_max_offset(starget) = 0; 611 spi_min_period(starget) = 612 ahc_find_period(ahc, scsirate, maxsync); 613 } 614 ahc_compile_devinfo(&devinfo, our_id, starget->id, 615 CAM_LUN_WILDCARD, channel, 616 ROLE_INITIATOR); 617 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0, 618 AHC_TRANS_GOAL, /*paused*/FALSE); 619 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 620 AHC_TRANS_GOAL, /*paused*/FALSE); 621 ahc_unlock(ahc, &flags); 622 623 return 0; 624 } 625 626 static void 627 ahc_linux_target_destroy(struct scsi_target *starget) 628 { 629 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); 630 631 *ahc_targp = NULL; 632 } 633 634 static int 635 ahc_linux_slave_alloc(struct scsi_device *sdev) 636 { 637 struct ahc_softc *ahc = 638 *((struct ahc_softc **)sdev->host->hostdata); 639 struct scsi_target *starget = sdev->sdev_target; 640 struct ahc_linux_device *dev; 641 642 if (bootverbose) 643 printk("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id); 644 645 dev = scsi_transport_device_data(sdev); 646 memset(dev, 0, sizeof(*dev)); 647 648 /* 649 * We start out life using untagged 650 * transactions of which we allow one. 651 */ 652 dev->openings = 1; 653 654 /* 655 * Set maxtags to 0. This will be changed if we 656 * later determine that we are dealing with 657 * a tagged queuing capable device. 658 */ 659 dev->maxtags = 0; 660 661 spi_period(starget) = 0; 662 663 return 0; 664 } 665 666 static int 667 ahc_linux_slave_configure(struct scsi_device *sdev) 668 { 669 if (bootverbose) 670 sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); 671 672 ahc_linux_device_queue_depth(sdev); 673 674 /* Initial Domain Validation */ 675 if (!spi_initial_dv(sdev->sdev_target)) 676 spi_dv_device(sdev); 677 678 return 0; 679 } 680 681 #if defined(__i386__) 682 /* 683 * Return the disk geometry for the given SCSI device. 684 */ 685 static int 686 ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 687 sector_t capacity, int geom[]) 688 { 689 int heads; 690 int sectors; 691 int cylinders; 692 int extended; 693 struct ahc_softc *ahc; 694 u_int channel; 695 696 ahc = *((struct ahc_softc **)sdev->host->hostdata); 697 channel = sdev_channel(sdev); 698 699 if (scsi_partsize(bdev, capacity, geom)) 700 return 0; 701 702 heads = 64; 703 sectors = 32; 704 cylinders = aic_sector_div(capacity, heads, sectors); 705 706 if (aic7xxx_extended != 0) 707 extended = 1; 708 else if (channel == 0) 709 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0; 710 else 711 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0; 712 if (extended && cylinders >= 1024) { 713 heads = 255; 714 sectors = 63; 715 cylinders = aic_sector_div(capacity, heads, sectors); 716 } 717 geom[0] = heads; 718 geom[1] = sectors; 719 geom[2] = cylinders; 720 return (0); 721 } 722 #endif 723 724 /* 725 * Abort the current SCSI command(s). 726 */ 727 static int 728 ahc_linux_abort(struct scsi_cmnd *cmd) 729 { 730 int error; 731 732 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT); 733 if (error != 0) 734 printk("aic7xxx_abort returns 0x%x\n", error); 735 return (error); 736 } 737 738 /* 739 * Attempt to send a target reset message to the device that timed out. 740 */ 741 static int 742 ahc_linux_dev_reset(struct scsi_cmnd *cmd) 743 { 744 int error; 745 746 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET); 747 if (error != 0) 748 printk("aic7xxx_dev_reset returns 0x%x\n", error); 749 return (error); 750 } 751 752 /* 753 * Reset the SCSI bus. 754 */ 755 static int 756 ahc_linux_bus_reset(struct scsi_cmnd *cmd) 757 { 758 struct ahc_softc *ahc; 759 int found; 760 unsigned long flags; 761 762 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 763 764 ahc_lock(ahc, &flags); 765 found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A', 766 /*initiate reset*/TRUE); 767 ahc_unlock(ahc, &flags); 768 769 if (bootverbose) 770 printk("%s: SCSI bus reset delivered. " 771 "%d SCBs aborted.\n", ahc_name(ahc), found); 772 773 return SUCCESS; 774 } 775 776 struct scsi_host_template aic7xxx_driver_template = { 777 .module = THIS_MODULE, 778 .name = "aic7xxx", 779 .proc_name = "aic7xxx", 780 .show_info = ahc_linux_show_info, 781 .write_info = ahc_proc_write_seeprom, 782 .info = ahc_linux_info, 783 .queuecommand = ahc_linux_queue, 784 .eh_abort_handler = ahc_linux_abort, 785 .eh_device_reset_handler = ahc_linux_dev_reset, 786 .eh_bus_reset_handler = ahc_linux_bus_reset, 787 #if defined(__i386__) 788 .bios_param = ahc_linux_biosparam, 789 #endif 790 .can_queue = AHC_MAX_QUEUE, 791 .this_id = -1, 792 .max_sectors = 8192, 793 .cmd_per_lun = 2, 794 .slave_alloc = ahc_linux_slave_alloc, 795 .slave_configure = ahc_linux_slave_configure, 796 .target_alloc = ahc_linux_target_alloc, 797 .target_destroy = ahc_linux_target_destroy, 798 }; 799 800 /**************************** Tasklet Handler *********************************/ 801 802 /******************************** Macros **************************************/ 803 #define BUILD_SCSIID(ahc, cmd) \ 804 ((((cmd)->device->id << TID_SHIFT) & TID) \ 805 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \ 806 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB)) 807 808 /******************************** Bus DMA *************************************/ 809 int 810 ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent, 811 bus_size_t alignment, bus_size_t boundary, 812 dma_addr_t lowaddr, dma_addr_t highaddr, 813 bus_dma_filter_t *filter, void *filterarg, 814 bus_size_t maxsize, int nsegments, 815 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 816 { 817 bus_dma_tag_t dmat; 818 819 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC); 820 if (dmat == NULL) 821 return (ENOMEM); 822 823 /* 824 * Linux is very simplistic about DMA memory. For now don't 825 * maintain all specification information. Once Linux supplies 826 * better facilities for doing these operations, or the 827 * needs of this particular driver change, we might need to do 828 * more here. 829 */ 830 dmat->alignment = alignment; 831 dmat->boundary = boundary; 832 dmat->maxsize = maxsize; 833 *ret_tag = dmat; 834 return (0); 835 } 836 837 void 838 ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat) 839 { 840 kfree(dmat); 841 } 842 843 int 844 ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr, 845 int flags, bus_dmamap_t *mapp) 846 { 847 /* XXX: check if we really need the GFP_ATOMIC and unwind this mess! */ 848 *vaddr = dma_alloc_coherent(ahc->dev, dmat->maxsize, mapp, GFP_ATOMIC); 849 if (*vaddr == NULL) 850 return ENOMEM; 851 return 0; 852 } 853 854 void 855 ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat, 856 void* vaddr, bus_dmamap_t map) 857 { 858 dma_free_coherent(ahc->dev, dmat->maxsize, vaddr, map); 859 } 860 861 int 862 ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map, 863 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 864 void *cb_arg, int flags) 865 { 866 /* 867 * Assume for now that this will only be used during 868 * initialization and not for per-transaction buffer mapping. 869 */ 870 bus_dma_segment_t stack_sg; 871 872 stack_sg.ds_addr = map; 873 stack_sg.ds_len = dmat->maxsize; 874 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 875 return (0); 876 } 877 878 void 879 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 880 { 881 } 882 883 int 884 ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 885 { 886 /* Nothing to do */ 887 return (0); 888 } 889 890 static void 891 ahc_linux_setup_tag_info_global(char *p) 892 { 893 int tags, i, j; 894 895 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 896 printk("Setting Global Tags= %d\n", tags); 897 898 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) { 899 for (j = 0; j < AHC_NUM_TARGETS; j++) { 900 aic7xxx_tag_info[i].tag_commands[j] = tags; 901 } 902 } 903 } 904 905 static void 906 ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 907 { 908 909 if ((instance >= 0) && (targ >= 0) 910 && (instance < ARRAY_SIZE(aic7xxx_tag_info)) 911 && (targ < AHC_NUM_TARGETS)) { 912 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff; 913 if (bootverbose) 914 printk("tag_info[%d:%d] = %d\n", instance, targ, value); 915 } 916 } 917 918 static char * 919 ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 920 void (*callback)(u_long, int, int, int32_t), 921 u_long callback_arg) 922 { 923 char *tok_end; 924 char *tok_end2; 925 int i; 926 int instance; 927 int targ; 928 int done; 929 char tok_list[] = {'.', ',', '{', '}', '\0'}; 930 931 /* All options use a ':' name/arg separator */ 932 if (*opt_arg != ':') 933 return (opt_arg); 934 opt_arg++; 935 instance = -1; 936 targ = -1; 937 done = FALSE; 938 /* 939 * Restore separator that may be in 940 * the middle of our option argument. 941 */ 942 tok_end = strchr(opt_arg, '\0'); 943 if (tok_end < end) 944 *tok_end = ','; 945 while (!done) { 946 switch (*opt_arg) { 947 case '{': 948 if (instance == -1) { 949 instance = 0; 950 } else { 951 if (depth > 1) { 952 if (targ == -1) 953 targ = 0; 954 } else { 955 printk("Malformed Option %s\n", 956 opt_name); 957 done = TRUE; 958 } 959 } 960 opt_arg++; 961 break; 962 case '}': 963 if (targ != -1) 964 targ = -1; 965 else if (instance != -1) 966 instance = -1; 967 opt_arg++; 968 break; 969 case ',': 970 case '.': 971 if (instance == -1) 972 done = TRUE; 973 else if (targ >= 0) 974 targ++; 975 else if (instance >= 0) 976 instance++; 977 opt_arg++; 978 break; 979 case '\0': 980 done = TRUE; 981 break; 982 default: 983 tok_end = end; 984 for (i = 0; tok_list[i]; i++) { 985 tok_end2 = strchr(opt_arg, tok_list[i]); 986 if ((tok_end2) && (tok_end2 < tok_end)) 987 tok_end = tok_end2; 988 } 989 callback(callback_arg, instance, targ, 990 simple_strtol(opt_arg, NULL, 0)); 991 opt_arg = tok_end; 992 break; 993 } 994 } 995 return (opt_arg); 996 } 997 998 /* 999 * Handle Linux boot parameters. This routine allows for assigning a value 1000 * to a parameter with a ':' between the parameter and the value. 1001 * ie. aic7xxx=stpwlev:1,extended 1002 */ 1003 static int 1004 aic7xxx_setup(char *s) 1005 { 1006 int i, n; 1007 char *p; 1008 char *end; 1009 1010 static const struct { 1011 const char *name; 1012 uint32_t *flag; 1013 } options[] = { 1014 { "extended", &aic7xxx_extended }, 1015 { "no_reset", &aic7xxx_no_reset }, 1016 { "verbose", &aic7xxx_verbose }, 1017 { "allow_memio", &aic7xxx_allow_memio}, 1018 #ifdef AHC_DEBUG 1019 { "debug", &ahc_debug }, 1020 #endif 1021 { "periodic_otag", &aic7xxx_periodic_otag }, 1022 { "pci_parity", &aic7xxx_pci_parity }, 1023 { "seltime", &aic7xxx_seltime }, 1024 { "tag_info", NULL }, 1025 { "global_tag_depth", NULL }, 1026 { "dv", NULL } 1027 }; 1028 1029 end = strchr(s, '\0'); 1030 1031 /* 1032 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE 1033 * will never be 0 in this case. 1034 */ 1035 n = 0; 1036 1037 while ((p = strsep(&s, ",.")) != NULL) { 1038 if (*p == '\0') 1039 continue; 1040 for (i = 0; i < ARRAY_SIZE(options); i++) { 1041 1042 n = strlen(options[i].name); 1043 if (strncmp(options[i].name, p, n) == 0) 1044 break; 1045 } 1046 if (i == ARRAY_SIZE(options)) 1047 continue; 1048 1049 if (strncmp(p, "global_tag_depth", n) == 0) { 1050 ahc_linux_setup_tag_info_global(p + n); 1051 } else if (strncmp(p, "tag_info", n) == 0) { 1052 s = ahc_parse_brace_option("tag_info", p + n, end, 1053 2, ahc_linux_setup_tag_info, 0); 1054 } else if (p[n] == ':') { 1055 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1056 } else if (strncmp(p, "verbose", n) == 0) { 1057 *(options[i].flag) = 1; 1058 } else { 1059 *(options[i].flag) ^= 0xFFFFFFFF; 1060 } 1061 } 1062 return 1; 1063 } 1064 1065 __setup("aic7xxx=", aic7xxx_setup); 1066 1067 uint32_t aic7xxx_verbose; 1068 1069 int 1070 ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template) 1071 { 1072 char buf[80]; 1073 struct Scsi_Host *host; 1074 char *new_name; 1075 u_long s; 1076 int retval; 1077 1078 template->name = ahc->description; 1079 host = scsi_host_alloc(template, sizeof(struct ahc_softc *)); 1080 if (host == NULL) 1081 return (ENOMEM); 1082 1083 *((struct ahc_softc **)host->hostdata) = ahc; 1084 ahc->platform_data->host = host; 1085 host->can_queue = AHC_MAX_QUEUE; 1086 host->cmd_per_lun = 2; 1087 /* XXX No way to communicate the ID for multiple channels */ 1088 host->this_id = ahc->our_id; 1089 host->irq = ahc->platform_data->irq; 1090 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8; 1091 host->max_lun = AHC_NUM_LUNS; 1092 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0; 1093 host->sg_tablesize = AHC_NSEG; 1094 ahc_lock(ahc, &s); 1095 ahc_set_unit(ahc, ahc_linux_unit++); 1096 ahc_unlock(ahc, &s); 1097 sprintf(buf, "scsi%d", host->host_no); 1098 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC); 1099 if (new_name != NULL) { 1100 strcpy(new_name, buf); 1101 ahc_set_name(ahc, new_name); 1102 } 1103 host->unique_id = ahc->unit; 1104 ahc_linux_initialize_scsi_bus(ahc); 1105 ahc_intr_enable(ahc, TRUE); 1106 1107 host->transportt = ahc_linux_transport_template; 1108 1109 retval = scsi_add_host(host, ahc->dev); 1110 if (retval) { 1111 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n"); 1112 scsi_host_put(host); 1113 return retval; 1114 } 1115 1116 scsi_scan_host(host); 1117 return 0; 1118 } 1119 1120 /* 1121 * Place the SCSI bus into a known state by either resetting it, 1122 * or forcing transfer negotiations on the next command to any 1123 * target. 1124 */ 1125 static void 1126 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc) 1127 { 1128 int i; 1129 int numtarg; 1130 unsigned long s; 1131 1132 i = 0; 1133 numtarg = 0; 1134 1135 ahc_lock(ahc, &s); 1136 1137 if (aic7xxx_no_reset != 0) 1138 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B); 1139 1140 if ((ahc->flags & AHC_RESET_BUS_A) != 0) 1141 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE); 1142 else 1143 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8; 1144 1145 if ((ahc->features & AHC_TWIN) != 0) { 1146 1147 if ((ahc->flags & AHC_RESET_BUS_B) != 0) { 1148 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE); 1149 } else { 1150 if (numtarg == 0) 1151 i = 8; 1152 numtarg += 8; 1153 } 1154 } 1155 1156 /* 1157 * Force negotiation to async for all targets that 1158 * will not see an initial bus reset. 1159 */ 1160 for (; i < numtarg; i++) { 1161 struct ahc_devinfo devinfo; 1162 struct ahc_initiator_tinfo *tinfo; 1163 struct ahc_tmode_tstate *tstate; 1164 u_int our_id; 1165 u_int target_id; 1166 char channel; 1167 1168 channel = 'A'; 1169 our_id = ahc->our_id; 1170 target_id = i; 1171 if (i > 7 && (ahc->features & AHC_TWIN) != 0) { 1172 channel = 'B'; 1173 our_id = ahc->our_id_b; 1174 target_id = i % 8; 1175 } 1176 tinfo = ahc_fetch_transinfo(ahc, channel, our_id, 1177 target_id, &tstate); 1178 ahc_compile_devinfo(&devinfo, our_id, target_id, 1179 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR); 1180 ahc_update_neg_request(ahc, &devinfo, tstate, 1181 tinfo, AHC_NEG_ALWAYS); 1182 } 1183 ahc_unlock(ahc, &s); 1184 /* Give the bus some time to recover */ 1185 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) { 1186 ahc_linux_freeze_simq(ahc); 1187 msleep(AIC7XXX_RESET_DELAY); 1188 ahc_linux_release_simq(ahc); 1189 } 1190 } 1191 1192 int 1193 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg) 1194 { 1195 1196 ahc->platform_data = 1197 kzalloc(sizeof(struct ahc_platform_data), GFP_ATOMIC); 1198 if (ahc->platform_data == NULL) 1199 return (ENOMEM); 1200 ahc->platform_data->irq = AHC_LINUX_NOIRQ; 1201 ahc_lockinit(ahc); 1202 ahc->seltime = (aic7xxx_seltime & 0x3) << 4; 1203 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4; 1204 if (aic7xxx_pci_parity == 0) 1205 ahc->flags |= AHC_DISABLE_PCI_PERR; 1206 1207 return (0); 1208 } 1209 1210 void 1211 ahc_platform_free(struct ahc_softc *ahc) 1212 { 1213 struct scsi_target *starget; 1214 int i; 1215 1216 if (ahc->platform_data != NULL) { 1217 /* destroy all of the device and target objects */ 1218 for (i = 0; i < AHC_NUM_TARGETS; i++) { 1219 starget = ahc->platform_data->starget[i]; 1220 if (starget != NULL) { 1221 ahc->platform_data->starget[i] = NULL; 1222 } 1223 } 1224 1225 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ) 1226 free_irq(ahc->platform_data->irq, ahc); 1227 if (ahc->tag == BUS_SPACE_PIO 1228 && ahc->bsh.ioport != 0) 1229 release_region(ahc->bsh.ioport, 256); 1230 if (ahc->tag == BUS_SPACE_MEMIO 1231 && ahc->bsh.maddr != NULL) { 1232 iounmap(ahc->bsh.maddr); 1233 release_mem_region(ahc->platform_data->mem_busaddr, 1234 0x1000); 1235 } 1236 1237 if (ahc->platform_data->host) 1238 scsi_host_put(ahc->platform_data->host); 1239 1240 kfree(ahc->platform_data); 1241 } 1242 } 1243 1244 void 1245 ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb) 1246 { 1247 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb), 1248 SCB_GET_CHANNEL(ahc, scb), 1249 SCB_GET_LUN(scb), SCB_LIST_NULL, 1250 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1251 } 1252 1253 void 1254 ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev, 1255 struct ahc_devinfo *devinfo, ahc_queue_alg alg) 1256 { 1257 struct ahc_linux_device *dev; 1258 int was_queuing; 1259 int now_queuing; 1260 1261 if (sdev == NULL) 1262 return; 1263 dev = scsi_transport_device_data(sdev); 1264 1265 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED); 1266 switch (alg) { 1267 default: 1268 case AHC_QUEUE_NONE: 1269 now_queuing = 0; 1270 break; 1271 case AHC_QUEUE_BASIC: 1272 now_queuing = AHC_DEV_Q_BASIC; 1273 break; 1274 case AHC_QUEUE_TAGGED: 1275 now_queuing = AHC_DEV_Q_TAGGED; 1276 break; 1277 } 1278 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0 1279 && (was_queuing != now_queuing) 1280 && (dev->active != 0)) { 1281 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY; 1282 dev->qfrozen++; 1283 } 1284 1285 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG); 1286 if (now_queuing) { 1287 u_int usertags; 1288 1289 usertags = ahc_linux_user_tagdepth(ahc, devinfo); 1290 if (!was_queuing) { 1291 /* 1292 * Start out aggressively and allow our 1293 * dynamic queue depth algorithm to take 1294 * care of the rest. 1295 */ 1296 dev->maxtags = usertags; 1297 dev->openings = dev->maxtags - dev->active; 1298 } 1299 if (dev->maxtags == 0) { 1300 /* 1301 * Queueing is disabled by the user. 1302 */ 1303 dev->openings = 1; 1304 } else if (alg == AHC_QUEUE_TAGGED) { 1305 dev->flags |= AHC_DEV_Q_TAGGED; 1306 if (aic7xxx_periodic_otag != 0) 1307 dev->flags |= AHC_DEV_PERIODIC_OTAG; 1308 } else 1309 dev->flags |= AHC_DEV_Q_BASIC; 1310 } else { 1311 /* We can only have one opening. */ 1312 dev->maxtags = 0; 1313 dev->openings = 1 - dev->active; 1314 } 1315 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) { 1316 case AHC_DEV_Q_BASIC: 1317 case AHC_DEV_Q_TAGGED: 1318 scsi_change_queue_depth(sdev, 1319 dev->openings + dev->active); 1320 break; 1321 default: 1322 /* 1323 * We allow the OS to queue 2 untagged transactions to 1324 * us at any time even though we can only execute them 1325 * serially on the controller/device. This should 1326 * remove some latency. 1327 */ 1328 scsi_change_queue_depth(sdev, 2); 1329 break; 1330 } 1331 } 1332 1333 int 1334 ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel, 1335 int lun, u_int tag, role_t role, uint32_t status) 1336 { 1337 return 0; 1338 } 1339 1340 static u_int 1341 ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 1342 { 1343 static int warned_user; 1344 u_int tags; 1345 1346 tags = 0; 1347 if ((ahc->user_discenable & devinfo->target_mask) != 0) { 1348 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) { 1349 if (warned_user == 0) { 1350 1351 printk(KERN_WARNING 1352 "aic7xxx: WARNING: Insufficient tag_info instances\n" 1353 "aic7xxx: for installed controllers. Using defaults\n" 1354 "aic7xxx: Please update the aic7xxx_tag_info array in\n" 1355 "aic7xxx: the aic7xxx_osm..c source file.\n"); 1356 warned_user++; 1357 } 1358 tags = AHC_MAX_QUEUE; 1359 } else { 1360 adapter_tag_info_t *tag_info; 1361 1362 tag_info = &aic7xxx_tag_info[ahc->unit]; 1363 tags = tag_info->tag_commands[devinfo->target_offset]; 1364 if (tags > AHC_MAX_QUEUE) 1365 tags = AHC_MAX_QUEUE; 1366 } 1367 } 1368 return (tags); 1369 } 1370 1371 /* 1372 * Determines the queue depth for a given device. 1373 */ 1374 static void 1375 ahc_linux_device_queue_depth(struct scsi_device *sdev) 1376 { 1377 struct ahc_devinfo devinfo; 1378 u_int tags; 1379 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata); 1380 1381 ahc_compile_devinfo(&devinfo, 1382 sdev->sdev_target->channel == 0 1383 ? ahc->our_id : ahc->our_id_b, 1384 sdev->sdev_target->id, sdev->lun, 1385 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1386 ROLE_INITIATOR); 1387 tags = ahc_linux_user_tagdepth(ahc, &devinfo); 1388 if (tags != 0 && sdev->tagged_supported != 0) { 1389 1390 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED); 1391 ahc_send_async(ahc, devinfo.channel, devinfo.target, 1392 devinfo.lun, AC_TRANSFER_NEG); 1393 ahc_print_devinfo(ahc, &devinfo); 1394 printk("Tagged Queuing enabled. Depth %d\n", tags); 1395 } else { 1396 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE); 1397 ahc_send_async(ahc, devinfo.channel, devinfo.target, 1398 devinfo.lun, AC_TRANSFER_NEG); 1399 } 1400 } 1401 1402 static int 1403 ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev, 1404 struct scsi_cmnd *cmd) 1405 { 1406 struct scb *scb; 1407 struct hardware_scb *hscb; 1408 struct ahc_initiator_tinfo *tinfo; 1409 struct ahc_tmode_tstate *tstate; 1410 uint16_t mask; 1411 struct scb_tailq *untagged_q = NULL; 1412 int nseg; 1413 1414 /* 1415 * Schedule us to run later. The only reason we are not 1416 * running is because the whole controller Q is frozen. 1417 */ 1418 if (ahc->platform_data->qfrozen != 0) 1419 return SCSI_MLQUEUE_HOST_BUSY; 1420 1421 /* 1422 * We only allow one untagged transaction 1423 * per target in the initiator role unless 1424 * we are storing a full busy target *lun* 1425 * table in SCB space. 1426 */ 1427 if (!(cmd->flags & SCMD_TAGGED) 1428 && (ahc->features & AHC_SCB_BTT) == 0) { 1429 int target_offset; 1430 1431 target_offset = cmd->device->id + cmd->device->channel * 8; 1432 untagged_q = &(ahc->untagged_queues[target_offset]); 1433 if (!TAILQ_EMPTY(untagged_q)) 1434 /* if we're already executing an untagged command 1435 * we're busy to another */ 1436 return SCSI_MLQUEUE_DEVICE_BUSY; 1437 } 1438 1439 nseg = scsi_dma_map(cmd); 1440 if (nseg < 0) 1441 return SCSI_MLQUEUE_HOST_BUSY; 1442 1443 /* 1444 * Get an scb to use. 1445 */ 1446 scb = ahc_get_scb(ahc); 1447 if (!scb) { 1448 scsi_dma_unmap(cmd); 1449 return SCSI_MLQUEUE_HOST_BUSY; 1450 } 1451 1452 scb->io_ctx = cmd; 1453 scb->platform_data->dev = dev; 1454 hscb = scb->hscb; 1455 cmd->host_scribble = (char *)scb; 1456 1457 /* 1458 * Fill out basics of the HSCB. 1459 */ 1460 hscb->control = 0; 1461 hscb->scsiid = BUILD_SCSIID(ahc, cmd); 1462 hscb->lun = cmd->device->lun; 1463 mask = SCB_GET_TARGET_MASK(ahc, scb); 1464 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb), 1465 SCB_GET_OUR_ID(scb), 1466 SCB_GET_TARGET(ahc, scb), &tstate); 1467 hscb->scsirate = tinfo->scsirate; 1468 hscb->scsioffset = tinfo->curr.offset; 1469 if ((tstate->ultraenb & mask) != 0) 1470 hscb->control |= ULTRAENB; 1471 1472 if ((ahc->user_discenable & mask) != 0) 1473 hscb->control |= DISCENB; 1474 1475 if ((tstate->auto_negotiate & mask) != 0) { 1476 scb->flags |= SCB_AUTO_NEGOTIATE; 1477 scb->hscb->control |= MK_MESSAGE; 1478 } 1479 1480 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) { 1481 if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH 1482 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) { 1483 hscb->control |= MSG_ORDERED_TASK; 1484 dev->commands_since_idle_or_otag = 0; 1485 } else { 1486 hscb->control |= MSG_SIMPLE_TASK; 1487 } 1488 } 1489 1490 hscb->cdb_len = cmd->cmd_len; 1491 if (hscb->cdb_len <= 12) { 1492 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len); 1493 } else { 1494 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len); 1495 scb->flags |= SCB_CDB32_PTR; 1496 } 1497 1498 scb->platform_data->xfer_len = 0; 1499 ahc_set_residual(scb, 0); 1500 ahc_set_sense_residual(scb, 0); 1501 scb->sg_count = 0; 1502 1503 if (nseg > 0) { 1504 struct ahc_dma_seg *sg; 1505 struct scatterlist *cur_seg; 1506 int i; 1507 1508 /* Copy the segments into the SG list. */ 1509 sg = scb->sg_list; 1510 /* 1511 * The sg_count may be larger than nseg if 1512 * a transfer crosses a 32bit page. 1513 */ 1514 scsi_for_each_sg(cmd, cur_seg, nseg, i) { 1515 dma_addr_t addr; 1516 bus_size_t len; 1517 int consumed; 1518 1519 addr = sg_dma_address(cur_seg); 1520 len = sg_dma_len(cur_seg); 1521 consumed = ahc_linux_map_seg(ahc, scb, 1522 sg, addr, len); 1523 sg += consumed; 1524 scb->sg_count += consumed; 1525 } 1526 sg--; 1527 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); 1528 1529 /* 1530 * Reset the sg list pointer. 1531 */ 1532 scb->hscb->sgptr = 1533 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); 1534 1535 /* 1536 * Copy the first SG into the "current" 1537 * data pointer area. 1538 */ 1539 scb->hscb->dataptr = scb->sg_list->addr; 1540 scb->hscb->datacnt = scb->sg_list->len; 1541 } else { 1542 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL); 1543 scb->hscb->dataptr = 0; 1544 scb->hscb->datacnt = 0; 1545 scb->sg_count = 0; 1546 } 1547 1548 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links); 1549 dev->openings--; 1550 dev->active++; 1551 dev->commands_issued++; 1552 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0) 1553 dev->commands_since_idle_or_otag++; 1554 1555 scb->flags |= SCB_ACTIVE; 1556 if (untagged_q) { 1557 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe); 1558 scb->flags |= SCB_UNTAGGEDQ; 1559 } 1560 ahc_queue_scb(ahc, scb); 1561 return 0; 1562 } 1563 1564 /* 1565 * SCSI controller interrupt handler. 1566 */ 1567 irqreturn_t 1568 ahc_linux_isr(int irq, void *dev_id) 1569 { 1570 struct ahc_softc *ahc; 1571 u_long flags; 1572 int ours; 1573 1574 ahc = (struct ahc_softc *) dev_id; 1575 ahc_lock(ahc, &flags); 1576 ours = ahc_intr(ahc); 1577 ahc_unlock(ahc, &flags); 1578 return IRQ_RETVAL(ours); 1579 } 1580 1581 void 1582 ahc_platform_flushwork(struct ahc_softc *ahc) 1583 { 1584 1585 } 1586 1587 void 1588 ahc_send_async(struct ahc_softc *ahc, char channel, 1589 u_int target, u_int lun, ac_code code) 1590 { 1591 switch (code) { 1592 case AC_TRANSFER_NEG: 1593 { 1594 struct scsi_target *starget; 1595 struct ahc_initiator_tinfo *tinfo; 1596 struct ahc_tmode_tstate *tstate; 1597 int target_offset; 1598 unsigned int target_ppr_options; 1599 1600 BUG_ON(target == CAM_TARGET_WILDCARD); 1601 1602 tinfo = ahc_fetch_transinfo(ahc, channel, 1603 channel == 'A' ? ahc->our_id 1604 : ahc->our_id_b, 1605 target, &tstate); 1606 1607 /* 1608 * Don't bother reporting results while 1609 * negotiations are still pending. 1610 */ 1611 if (tinfo->curr.period != tinfo->goal.period 1612 || tinfo->curr.width != tinfo->goal.width 1613 || tinfo->curr.offset != tinfo->goal.offset 1614 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1615 if (bootverbose == 0) 1616 break; 1617 1618 /* 1619 * Don't bother reporting results that 1620 * are identical to those last reported. 1621 */ 1622 target_offset = target; 1623 if (channel == 'B') 1624 target_offset += 8; 1625 starget = ahc->platform_data->starget[target_offset]; 1626 if (starget == NULL) 1627 break; 1628 1629 target_ppr_options = 1630 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1631 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1632 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0); 1633 1634 if (tinfo->curr.period == spi_period(starget) 1635 && tinfo->curr.width == spi_width(starget) 1636 && tinfo->curr.offset == spi_offset(starget) 1637 && tinfo->curr.ppr_options == target_ppr_options) 1638 if (bootverbose == 0) 1639 break; 1640 1641 spi_period(starget) = tinfo->curr.period; 1642 spi_width(starget) = tinfo->curr.width; 1643 spi_offset(starget) = tinfo->curr.offset; 1644 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1645 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1646 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1647 spi_display_xfer_agreement(starget); 1648 break; 1649 } 1650 case AC_SENT_BDR: 1651 { 1652 WARN_ON(lun != CAM_LUN_WILDCARD); 1653 scsi_report_device_reset(ahc->platform_data->host, 1654 channel - 'A', target); 1655 break; 1656 } 1657 case AC_BUS_RESET: 1658 if (ahc->platform_data->host != NULL) { 1659 scsi_report_bus_reset(ahc->platform_data->host, 1660 channel - 'A'); 1661 } 1662 break; 1663 default: 1664 panic("ahc_send_async: Unexpected async event"); 1665 } 1666 } 1667 1668 /* 1669 * Calls the higher level scsi done function and frees the scb. 1670 */ 1671 void 1672 ahc_done(struct ahc_softc *ahc, struct scb *scb) 1673 { 1674 struct scsi_cmnd *cmd; 1675 struct ahc_linux_device *dev; 1676 1677 LIST_REMOVE(scb, pending_links); 1678 if ((scb->flags & SCB_UNTAGGEDQ) != 0) { 1679 struct scb_tailq *untagged_q; 1680 int target_offset; 1681 1682 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); 1683 untagged_q = &(ahc->untagged_queues[target_offset]); 1684 TAILQ_REMOVE(untagged_q, scb, links.tqe); 1685 BUG_ON(!TAILQ_EMPTY(untagged_q)); 1686 } else if ((scb->flags & SCB_ACTIVE) == 0) { 1687 /* 1688 * Transactions aborted from the untagged queue may 1689 * not have been dispatched to the controller, so 1690 * only check the SCB_ACTIVE flag for tagged transactions. 1691 */ 1692 printk("SCB %d done'd twice\n", scb->hscb->tag); 1693 ahc_dump_card_state(ahc); 1694 panic("Stopping for safety"); 1695 } 1696 cmd = scb->io_ctx; 1697 dev = scb->platform_data->dev; 1698 dev->active--; 1699 dev->openings++; 1700 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1701 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1702 dev->qfrozen--; 1703 } 1704 ahc_linux_unmap_scb(ahc, scb); 1705 1706 /* 1707 * Guard against stale sense data. 1708 * The Linux mid-layer assumes that sense 1709 * was retrieved anytime the first byte of 1710 * the sense buffer looks "sane". 1711 */ 1712 cmd->sense_buffer[0] = 0; 1713 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) { 1714 #ifdef AHC_REPORT_UNDERFLOWS 1715 uint32_t amount_xferred; 1716 1717 amount_xferred = 1718 ahc_get_transfer_length(scb) - ahc_get_residual(scb); 1719 #endif 1720 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1721 #ifdef AHC_DEBUG 1722 if ((ahc_debug & AHC_SHOW_MISC) != 0) { 1723 ahc_print_path(ahc, scb); 1724 printk("Set CAM_UNCOR_PARITY\n"); 1725 } 1726 #endif 1727 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY); 1728 #ifdef AHC_REPORT_UNDERFLOWS 1729 /* 1730 * This code is disabled by default as some 1731 * clients of the SCSI system do not properly 1732 * initialize the underflow parameter. This 1733 * results in spurious termination of commands 1734 * that complete as expected (e.g. underflow is 1735 * allowed as command can return variable amounts 1736 * of data. 1737 */ 1738 } else if (amount_xferred < scb->io_ctx->underflow) { 1739 u_int i; 1740 1741 ahc_print_path(ahc, scb); 1742 printk("CDB:"); 1743 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1744 printk(" 0x%x", scb->io_ctx->cmnd[i]); 1745 printk("\n"); 1746 ahc_print_path(ahc, scb); 1747 printk("Saw underflow (%ld of %ld bytes). " 1748 "Treated as error\n", 1749 ahc_get_residual(scb), 1750 ahc_get_transfer_length(scb)); 1751 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1752 #endif 1753 } else { 1754 ahc_set_transaction_status(scb, CAM_REQ_CMP); 1755 } 1756 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1757 ahc_linux_handle_scsi_status(ahc, cmd->device, scb); 1758 } 1759 1760 if (dev->openings == 1 1761 && ahc_get_transaction_status(scb) == CAM_REQ_CMP 1762 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1763 dev->tag_success_count++; 1764 /* 1765 * Some devices deal with temporary internal resource 1766 * shortages by returning queue full. When the queue 1767 * full occurrs, we throttle back. Slowly try to get 1768 * back to our previous queue depth. 1769 */ 1770 if ((dev->openings + dev->active) < dev->maxtags 1771 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) { 1772 dev->tag_success_count = 0; 1773 dev->openings++; 1774 } 1775 1776 if (dev->active == 0) 1777 dev->commands_since_idle_or_otag = 0; 1778 1779 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1780 printk("Recovery SCB completes\n"); 1781 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT 1782 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED) 1783 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1784 1785 if (ahc->platform_data->eh_done) 1786 complete(ahc->platform_data->eh_done); 1787 } 1788 1789 ahc_free_scb(ahc, scb); 1790 ahc_linux_queue_cmd_complete(ahc, cmd); 1791 } 1792 1793 static void 1794 ahc_linux_handle_scsi_status(struct ahc_softc *ahc, 1795 struct scsi_device *sdev, struct scb *scb) 1796 { 1797 struct ahc_devinfo devinfo; 1798 struct ahc_linux_device *dev = scsi_transport_device_data(sdev); 1799 1800 ahc_compile_devinfo(&devinfo, 1801 ahc->our_id, 1802 sdev->sdev_target->id, sdev->lun, 1803 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1804 ROLE_INITIATOR); 1805 1806 /* 1807 * We don't currently trust the mid-layer to 1808 * properly deal with queue full or busy. So, 1809 * when one occurs, we tell the mid-layer to 1810 * unconditionally requeue the command to us 1811 * so that we can retry it ourselves. We also 1812 * implement our own throttling mechanism so 1813 * we don't clobber the device with too many 1814 * commands. 1815 */ 1816 switch (ahc_get_scsi_status(scb)) { 1817 default: 1818 break; 1819 case SCSI_STATUS_CHECK_COND: 1820 case SCSI_STATUS_CMD_TERMINATED: 1821 { 1822 struct scsi_cmnd *cmd; 1823 1824 /* 1825 * Copy sense information to the OS's cmd 1826 * structure if it is available. 1827 */ 1828 cmd = scb->io_ctx; 1829 if (scb->flags & SCB_SENSE) { 1830 u_int sense_size; 1831 1832 sense_size = min(sizeof(struct scsi_sense_data) 1833 - ahc_get_sense_residual(scb), 1834 (u_long)SCSI_SENSE_BUFFERSIZE); 1835 memcpy(cmd->sense_buffer, 1836 ahc_get_sense_buf(ahc, scb), sense_size); 1837 if (sense_size < SCSI_SENSE_BUFFERSIZE) 1838 memset(&cmd->sense_buffer[sense_size], 0, 1839 SCSI_SENSE_BUFFERSIZE - sense_size); 1840 cmd->result |= (DRIVER_SENSE << 24); 1841 #ifdef AHC_DEBUG 1842 if (ahc_debug & AHC_SHOW_SENSE) { 1843 int i; 1844 1845 printk("Copied %d bytes of sense data:", 1846 sense_size); 1847 for (i = 0; i < sense_size; i++) { 1848 if ((i & 0xF) == 0) 1849 printk("\n"); 1850 printk("0x%x ", cmd->sense_buffer[i]); 1851 } 1852 printk("\n"); 1853 } 1854 #endif 1855 } 1856 break; 1857 } 1858 case SCSI_STATUS_QUEUE_FULL: 1859 { 1860 /* 1861 * By the time the core driver has returned this 1862 * command, all other commands that were queued 1863 * to us but not the device have been returned. 1864 * This ensures that dev->active is equal to 1865 * the number of commands actually queued to 1866 * the device. 1867 */ 1868 dev->tag_success_count = 0; 1869 if (dev->active != 0) { 1870 /* 1871 * Drop our opening count to the number 1872 * of commands currently outstanding. 1873 */ 1874 dev->openings = 0; 1875 /* 1876 ahc_print_path(ahc, scb); 1877 printk("Dropping tag count to %d\n", dev->active); 1878 */ 1879 if (dev->active == dev->tags_on_last_queuefull) { 1880 1881 dev->last_queuefull_same_count++; 1882 /* 1883 * If we repeatedly see a queue full 1884 * at the same queue depth, this 1885 * device has a fixed number of tag 1886 * slots. Lock in this tag depth 1887 * so we stop seeing queue fulls from 1888 * this device. 1889 */ 1890 if (dev->last_queuefull_same_count 1891 == AHC_LOCK_TAGS_COUNT) { 1892 dev->maxtags = dev->active; 1893 ahc_print_path(ahc, scb); 1894 printk("Locking max tag count at %d\n", 1895 dev->active); 1896 } 1897 } else { 1898 dev->tags_on_last_queuefull = dev->active; 1899 dev->last_queuefull_same_count = 0; 1900 } 1901 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ); 1902 ahc_set_scsi_status(scb, SCSI_STATUS_OK); 1903 ahc_platform_set_tags(ahc, sdev, &devinfo, 1904 (dev->flags & AHC_DEV_Q_BASIC) 1905 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1906 break; 1907 } 1908 /* 1909 * Drop down to a single opening, and treat this 1910 * as if the target returned BUSY SCSI status. 1911 */ 1912 dev->openings = 1; 1913 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY); 1914 ahc_platform_set_tags(ahc, sdev, &devinfo, 1915 (dev->flags & AHC_DEV_Q_BASIC) 1916 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1917 break; 1918 } 1919 } 1920 } 1921 1922 static void 1923 ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd) 1924 { 1925 /* 1926 * Map CAM error codes into Linux Error codes. We 1927 * avoid the conversion so that the DV code has the 1928 * full error information available when making 1929 * state change decisions. 1930 */ 1931 { 1932 u_int new_status; 1933 1934 switch (ahc_cmd_get_transaction_status(cmd)) { 1935 case CAM_REQ_INPROG: 1936 case CAM_REQ_CMP: 1937 case CAM_SCSI_STATUS_ERROR: 1938 new_status = DID_OK; 1939 break; 1940 case CAM_REQ_ABORTED: 1941 new_status = DID_ABORT; 1942 break; 1943 case CAM_BUSY: 1944 new_status = DID_BUS_BUSY; 1945 break; 1946 case CAM_REQ_INVALID: 1947 case CAM_PATH_INVALID: 1948 new_status = DID_BAD_TARGET; 1949 break; 1950 case CAM_SEL_TIMEOUT: 1951 new_status = DID_NO_CONNECT; 1952 break; 1953 case CAM_SCSI_BUS_RESET: 1954 case CAM_BDR_SENT: 1955 new_status = DID_RESET; 1956 break; 1957 case CAM_UNCOR_PARITY: 1958 new_status = DID_PARITY; 1959 break; 1960 case CAM_CMD_TIMEOUT: 1961 new_status = DID_TIME_OUT; 1962 break; 1963 case CAM_UA_ABORT: 1964 case CAM_REQ_CMP_ERR: 1965 case CAM_AUTOSENSE_FAIL: 1966 case CAM_NO_HBA: 1967 case CAM_DATA_RUN_ERR: 1968 case CAM_UNEXP_BUSFREE: 1969 case CAM_SEQUENCE_FAIL: 1970 case CAM_CCB_LEN_ERR: 1971 case CAM_PROVIDE_FAIL: 1972 case CAM_REQ_TERMIO: 1973 case CAM_UNREC_HBA_ERROR: 1974 case CAM_REQ_TOO_BIG: 1975 new_status = DID_ERROR; 1976 break; 1977 case CAM_REQUEUE_REQ: 1978 new_status = DID_REQUEUE; 1979 break; 1980 default: 1981 /* We should never get here */ 1982 new_status = DID_ERROR; 1983 break; 1984 } 1985 1986 ahc_cmd_set_transaction_status(cmd, new_status); 1987 } 1988 1989 cmd->scsi_done(cmd); 1990 } 1991 1992 static void 1993 ahc_linux_freeze_simq(struct ahc_softc *ahc) 1994 { 1995 unsigned long s; 1996 1997 ahc_lock(ahc, &s); 1998 ahc->platform_data->qfrozen++; 1999 if (ahc->platform_data->qfrozen == 1) { 2000 scsi_block_requests(ahc->platform_data->host); 2001 2002 /* XXX What about Twin channels? */ 2003 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, 2004 CAM_LUN_WILDCARD, SCB_LIST_NULL, 2005 ROLE_INITIATOR, CAM_REQUEUE_REQ); 2006 } 2007 ahc_unlock(ahc, &s); 2008 } 2009 2010 static void 2011 ahc_linux_release_simq(struct ahc_softc *ahc) 2012 { 2013 u_long s; 2014 int unblock_reqs; 2015 2016 unblock_reqs = 0; 2017 ahc_lock(ahc, &s); 2018 if (ahc->platform_data->qfrozen > 0) 2019 ahc->platform_data->qfrozen--; 2020 if (ahc->platform_data->qfrozen == 0) 2021 unblock_reqs = 1; 2022 ahc_unlock(ahc, &s); 2023 /* 2024 * There is still a race here. The mid-layer 2025 * should keep its own freeze count and use 2026 * a bottom half handler to run the queues 2027 * so we can unblock with our own lock held. 2028 */ 2029 if (unblock_reqs) 2030 scsi_unblock_requests(ahc->platform_data->host); 2031 } 2032 2033 static int 2034 ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag) 2035 { 2036 struct ahc_softc *ahc; 2037 struct ahc_linux_device *dev; 2038 struct scb *pending_scb; 2039 u_int saved_scbptr; 2040 u_int active_scb_index; 2041 u_int last_phase; 2042 u_int saved_scsiid; 2043 u_int cdb_byte; 2044 int retval; 2045 int was_paused; 2046 int paused; 2047 int wait; 2048 int disconnected; 2049 unsigned long flags; 2050 2051 pending_scb = NULL; 2052 paused = FALSE; 2053 wait = FALSE; 2054 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 2055 2056 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n", 2057 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET"); 2058 2059 printk("CDB:"); 2060 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2061 printk(" 0x%x", cmd->cmnd[cdb_byte]); 2062 printk("\n"); 2063 2064 ahc_lock(ahc, &flags); 2065 2066 /* 2067 * First determine if we currently own this command. 2068 * Start by searching the device queue. If not found 2069 * there, check the pending_scb list. If not found 2070 * at all, and the system wanted us to just abort the 2071 * command, return success. 2072 */ 2073 dev = scsi_transport_device_data(cmd->device); 2074 2075 if (dev == NULL) { 2076 /* 2077 * No target device for this command exists, 2078 * so we must not still own the command. 2079 */ 2080 printk("%s:%d:%d:%d: Is not an active device\n", 2081 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2082 (u8)cmd->device->lun); 2083 retval = SUCCESS; 2084 goto no_cmd; 2085 } 2086 2087 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0 2088 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id, 2089 cmd->device->channel + 'A', 2090 (u8)cmd->device->lun, 2091 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) { 2092 printk("%s:%d:%d:%d: Command found on untagged queue\n", 2093 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2094 (u8)cmd->device->lun); 2095 retval = SUCCESS; 2096 goto done; 2097 } 2098 2099 /* 2100 * See if we can find a matching cmd in the pending list. 2101 */ 2102 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2103 if (pending_scb->io_ctx == cmd) 2104 break; 2105 } 2106 2107 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) { 2108 2109 /* Any SCB for this device will do for a target reset */ 2110 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2111 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd), 2112 scmd_channel(cmd) + 'A', 2113 CAM_LUN_WILDCARD, 2114 SCB_LIST_NULL, ROLE_INITIATOR)) 2115 break; 2116 } 2117 } 2118 2119 if (pending_scb == NULL) { 2120 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2121 goto no_cmd; 2122 } 2123 2124 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2125 /* 2126 * We can't queue two recovery actions using the same SCB 2127 */ 2128 retval = FAILED; 2129 goto done; 2130 } 2131 2132 /* 2133 * Ensure that the card doesn't do anything 2134 * behind our back and that we didn't "just" miss 2135 * an interrupt that would affect this cmd. 2136 */ 2137 was_paused = ahc_is_paused(ahc); 2138 ahc_pause_and_flushwork(ahc); 2139 paused = TRUE; 2140 2141 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2142 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2143 goto no_cmd; 2144 } 2145 2146 printk("%s: At time of recovery, card was %spaused\n", 2147 ahc_name(ahc), was_paused ? "" : "not "); 2148 ahc_dump_card_state(ahc); 2149 2150 disconnected = TRUE; 2151 if (flag == SCB_ABORT) { 2152 if (ahc_search_qinfifo(ahc, cmd->device->id, 2153 cmd->device->channel + 'A', 2154 cmd->device->lun, 2155 pending_scb->hscb->tag, 2156 ROLE_INITIATOR, CAM_REQ_ABORTED, 2157 SEARCH_COMPLETE) > 0) { 2158 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2159 ahc_name(ahc), cmd->device->channel, 2160 cmd->device->id, (u8)cmd->device->lun); 2161 retval = SUCCESS; 2162 goto done; 2163 } 2164 } else if (ahc_search_qinfifo(ahc, cmd->device->id, 2165 cmd->device->channel + 'A', 2166 cmd->device->lun, 2167 pending_scb->hscb->tag, 2168 ROLE_INITIATOR, /*status*/0, 2169 SEARCH_COUNT) > 0) { 2170 disconnected = FALSE; 2171 } 2172 2173 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2174 struct scb *bus_scb; 2175 2176 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG)); 2177 if (bus_scb == pending_scb) 2178 disconnected = FALSE; 2179 else if (flag != SCB_ABORT 2180 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid 2181 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb)) 2182 disconnected = FALSE; 2183 } 2184 2185 /* 2186 * At this point, pending_scb is the scb associated with the 2187 * passed in command. That command is currently active on the 2188 * bus, is in the disconnected state, or we're hoping to find 2189 * a command for the same target active on the bus to abuse to 2190 * send a BDR. Queue the appropriate message based on which of 2191 * these states we are in. 2192 */ 2193 last_phase = ahc_inb(ahc, LASTPHASE); 2194 saved_scbptr = ahc_inb(ahc, SCBPTR); 2195 active_scb_index = ahc_inb(ahc, SCB_TAG); 2196 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); 2197 if (last_phase != P_BUSFREE 2198 && (pending_scb->hscb->tag == active_scb_index 2199 || (flag == SCB_DEVICE_RESET 2200 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) { 2201 2202 /* 2203 * We're active on the bus, so assert ATN 2204 * and hope that the target responds. 2205 */ 2206 pending_scb = ahc_lookup_scb(ahc, active_scb_index); 2207 pending_scb->flags |= SCB_RECOVERY_SCB|flag; 2208 ahc_outb(ahc, MSG_OUT, HOST_MSG); 2209 ahc_outb(ahc, SCSISIGO, last_phase|ATNO); 2210 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2211 wait = TRUE; 2212 } else if (disconnected) { 2213 2214 /* 2215 * Actually re-queue this SCB in an attempt 2216 * to select the device before it reconnects. 2217 * In either case (selection or reselection), 2218 * we will now issue the approprate message 2219 * to the timed-out device. 2220 * 2221 * Set the MK_MESSAGE control bit indicating 2222 * that we desire to send a message. We 2223 * also set the disconnected flag since 2224 * in the paging case there is no guarantee 2225 * that our SCB control byte matches the 2226 * version on the card. We don't want the 2227 * sequencer to abort the command thinking 2228 * an unsolicited reselection occurred. 2229 */ 2230 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2231 pending_scb->flags |= SCB_RECOVERY_SCB|flag; 2232 2233 /* 2234 * Remove any cached copy of this SCB in the 2235 * disconnected list in preparation for the 2236 * queuing of our abort SCB. We use the 2237 * same element in the SCB, SCB_NEXT, for 2238 * both the qinfifo and the disconnected list. 2239 */ 2240 ahc_search_disc_list(ahc, cmd->device->id, 2241 cmd->device->channel + 'A', 2242 cmd->device->lun, pending_scb->hscb->tag, 2243 /*stop_on_first*/TRUE, 2244 /*remove*/TRUE, 2245 /*save_state*/FALSE); 2246 2247 /* 2248 * In the non-paging case, the sequencer will 2249 * never re-reference the in-core SCB. 2250 * To make sure we are notified during 2251 * reselection, set the MK_MESSAGE flag in 2252 * the card's copy of the SCB. 2253 */ 2254 if ((ahc->flags & AHC_PAGESCBS) == 0) { 2255 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag); 2256 ahc_outb(ahc, SCB_CONTROL, 2257 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE); 2258 } 2259 2260 /* 2261 * Clear out any entries in the QINFIFO first 2262 * so we are the next SCB for this target 2263 * to run. 2264 */ 2265 ahc_search_qinfifo(ahc, cmd->device->id, 2266 cmd->device->channel + 'A', 2267 cmd->device->lun, SCB_LIST_NULL, 2268 ROLE_INITIATOR, CAM_REQUEUE_REQ, 2269 SEARCH_COMPLETE); 2270 ahc_qinfifo_requeue_tail(ahc, pending_scb); 2271 ahc_outb(ahc, SCBPTR, saved_scbptr); 2272 ahc_print_path(ahc, pending_scb); 2273 printk("Device is disconnected, re-queuing SCB\n"); 2274 wait = TRUE; 2275 } else { 2276 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2277 retval = FAILED; 2278 goto done; 2279 } 2280 2281 no_cmd: 2282 /* 2283 * Our assumption is that if we don't have the command, no 2284 * recovery action was required, so we return success. Again, 2285 * the semantics of the mid-layer recovery engine are not 2286 * well defined, so this may change in time. 2287 */ 2288 retval = SUCCESS; 2289 done: 2290 if (paused) 2291 ahc_unpause(ahc); 2292 if (wait) { 2293 DECLARE_COMPLETION_ONSTACK(done); 2294 2295 ahc->platform_data->eh_done = &done; 2296 ahc_unlock(ahc, &flags); 2297 2298 printk("Recovery code sleeping\n"); 2299 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2300 ahc_lock(ahc, &flags); 2301 ahc->platform_data->eh_done = NULL; 2302 ahc_unlock(ahc, &flags); 2303 2304 printk("Timer Expired\n"); 2305 retval = FAILED; 2306 } 2307 printk("Recovery code awake\n"); 2308 } else 2309 ahc_unlock(ahc, &flags); 2310 return (retval); 2311 } 2312 2313 static void ahc_linux_set_width(struct scsi_target *starget, int width) 2314 { 2315 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2316 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2317 struct ahc_devinfo devinfo; 2318 unsigned long flags; 2319 2320 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2321 starget->channel + 'A', ROLE_INITIATOR); 2322 ahc_lock(ahc, &flags); 2323 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE); 2324 ahc_unlock(ahc, &flags); 2325 } 2326 2327 static void ahc_linux_set_period(struct scsi_target *starget, int period) 2328 { 2329 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2330 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2331 struct ahc_tmode_tstate *tstate; 2332 struct ahc_initiator_tinfo *tinfo 2333 = ahc_fetch_transinfo(ahc, 2334 starget->channel + 'A', 2335 shost->this_id, starget->id, &tstate); 2336 struct ahc_devinfo devinfo; 2337 unsigned int ppr_options = tinfo->goal.ppr_options; 2338 unsigned long flags; 2339 unsigned long offset = tinfo->goal.offset; 2340 const struct ahc_syncrate *syncrate; 2341 2342 if (offset == 0) 2343 offset = MAX_OFFSET; 2344 2345 if (period < 9) 2346 period = 9; /* 12.5ns is our minimum */ 2347 if (period == 9) { 2348 if (spi_max_width(starget)) 2349 ppr_options |= MSG_EXT_PPR_DT_REQ; 2350 else 2351 /* need wide for DT and need DT for 12.5 ns */ 2352 period = 10; 2353 } 2354 2355 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2356 starget->channel + 'A', ROLE_INITIATOR); 2357 2358 /* all PPR requests apart from QAS require wide transfers */ 2359 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2360 if (spi_width(starget) == 0) 2361 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2362 } 2363 2364 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2365 ahc_lock(ahc, &flags); 2366 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2367 ppr_options, AHC_TRANS_GOAL, FALSE); 2368 ahc_unlock(ahc, &flags); 2369 } 2370 2371 static void ahc_linux_set_offset(struct scsi_target *starget, int offset) 2372 { 2373 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2374 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2375 struct ahc_tmode_tstate *tstate; 2376 struct ahc_initiator_tinfo *tinfo 2377 = ahc_fetch_transinfo(ahc, 2378 starget->channel + 'A', 2379 shost->this_id, starget->id, &tstate); 2380 struct ahc_devinfo devinfo; 2381 unsigned int ppr_options = 0; 2382 unsigned int period = 0; 2383 unsigned long flags; 2384 const struct ahc_syncrate *syncrate = NULL; 2385 2386 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2387 starget->channel + 'A', ROLE_INITIATOR); 2388 if (offset != 0) { 2389 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2390 period = tinfo->goal.period; 2391 ppr_options = tinfo->goal.ppr_options; 2392 } 2393 ahc_lock(ahc, &flags); 2394 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2395 ppr_options, AHC_TRANS_GOAL, FALSE); 2396 ahc_unlock(ahc, &flags); 2397 } 2398 2399 static void ahc_linux_set_dt(struct scsi_target *starget, int dt) 2400 { 2401 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2402 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2403 struct ahc_tmode_tstate *tstate; 2404 struct ahc_initiator_tinfo *tinfo 2405 = ahc_fetch_transinfo(ahc, 2406 starget->channel + 'A', 2407 shost->this_id, starget->id, &tstate); 2408 struct ahc_devinfo devinfo; 2409 unsigned int ppr_options = tinfo->goal.ppr_options 2410 & ~MSG_EXT_PPR_DT_REQ; 2411 unsigned int period = tinfo->goal.period; 2412 unsigned int width = tinfo->goal.width; 2413 unsigned long flags; 2414 const struct ahc_syncrate *syncrate; 2415 2416 if (dt && spi_max_width(starget)) { 2417 ppr_options |= MSG_EXT_PPR_DT_REQ; 2418 if (!width) 2419 ahc_linux_set_width(starget, 1); 2420 } else if (period == 9) 2421 period = 10; /* if resetting DT, period must be >= 25ns */ 2422 2423 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2424 starget->channel + 'A', ROLE_INITIATOR); 2425 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT); 2426 ahc_lock(ahc, &flags); 2427 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2428 ppr_options, AHC_TRANS_GOAL, FALSE); 2429 ahc_unlock(ahc, &flags); 2430 } 2431 2432 #if 0 2433 /* FIXME: This code claims to support IU and QAS. However, the actual 2434 * sequencer code and aic7xxx_core have no support for these parameters and 2435 * will get into a bad state if they're negotiated. Do not enable this 2436 * unless you know what you're doing */ 2437 static void ahc_linux_set_qas(struct scsi_target *starget, int qas) 2438 { 2439 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2440 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2441 struct ahc_tmode_tstate *tstate; 2442 struct ahc_initiator_tinfo *tinfo 2443 = ahc_fetch_transinfo(ahc, 2444 starget->channel + 'A', 2445 shost->this_id, starget->id, &tstate); 2446 struct ahc_devinfo devinfo; 2447 unsigned int ppr_options = tinfo->goal.ppr_options 2448 & ~MSG_EXT_PPR_QAS_REQ; 2449 unsigned int period = tinfo->goal.period; 2450 unsigned long flags; 2451 struct ahc_syncrate *syncrate; 2452 2453 if (qas) 2454 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2455 2456 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2457 starget->channel + 'A', ROLE_INITIATOR); 2458 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2459 ahc_lock(ahc, &flags); 2460 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2461 ppr_options, AHC_TRANS_GOAL, FALSE); 2462 ahc_unlock(ahc, &flags); 2463 } 2464 2465 static void ahc_linux_set_iu(struct scsi_target *starget, int iu) 2466 { 2467 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2468 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2469 struct ahc_tmode_tstate *tstate; 2470 struct ahc_initiator_tinfo *tinfo 2471 = ahc_fetch_transinfo(ahc, 2472 starget->channel + 'A', 2473 shost->this_id, starget->id, &tstate); 2474 struct ahc_devinfo devinfo; 2475 unsigned int ppr_options = tinfo->goal.ppr_options 2476 & ~MSG_EXT_PPR_IU_REQ; 2477 unsigned int period = tinfo->goal.period; 2478 unsigned long flags; 2479 struct ahc_syncrate *syncrate; 2480 2481 if (iu) 2482 ppr_options |= MSG_EXT_PPR_IU_REQ; 2483 2484 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2485 starget->channel + 'A', ROLE_INITIATOR); 2486 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2487 ahc_lock(ahc, &flags); 2488 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2489 ppr_options, AHC_TRANS_GOAL, FALSE); 2490 ahc_unlock(ahc, &flags); 2491 } 2492 #endif 2493 2494 static void ahc_linux_get_signalling(struct Scsi_Host *shost) 2495 { 2496 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata; 2497 unsigned long flags; 2498 u8 mode; 2499 2500 if (!(ahc->features & AHC_ULTRA2)) { 2501 /* non-LVD chipset, may not have SBLKCTL reg */ 2502 spi_signalling(shost) = 2503 ahc->features & AHC_HVD ? 2504 SPI_SIGNAL_HVD : 2505 SPI_SIGNAL_SE; 2506 return; 2507 } 2508 2509 ahc_lock(ahc, &flags); 2510 ahc_pause(ahc); 2511 mode = ahc_inb(ahc, SBLKCTL); 2512 ahc_unpause(ahc); 2513 ahc_unlock(ahc, &flags); 2514 2515 if (mode & ENAB40) 2516 spi_signalling(shost) = SPI_SIGNAL_LVD; 2517 else if (mode & ENAB20) 2518 spi_signalling(shost) = SPI_SIGNAL_SE; 2519 else 2520 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2521 } 2522 2523 static struct spi_function_template ahc_linux_transport_functions = { 2524 .set_offset = ahc_linux_set_offset, 2525 .show_offset = 1, 2526 .set_period = ahc_linux_set_period, 2527 .show_period = 1, 2528 .set_width = ahc_linux_set_width, 2529 .show_width = 1, 2530 .set_dt = ahc_linux_set_dt, 2531 .show_dt = 1, 2532 #if 0 2533 .set_iu = ahc_linux_set_iu, 2534 .show_iu = 1, 2535 .set_qas = ahc_linux_set_qas, 2536 .show_qas = 1, 2537 #endif 2538 .get_signalling = ahc_linux_get_signalling, 2539 }; 2540 2541 2542 2543 static int __init 2544 ahc_linux_init(void) 2545 { 2546 /* 2547 * If we've been passed any parameters, process them now. 2548 */ 2549 if (aic7xxx) 2550 aic7xxx_setup(aic7xxx); 2551 2552 ahc_linux_transport_template = 2553 spi_attach_transport(&ahc_linux_transport_functions); 2554 if (!ahc_linux_transport_template) 2555 return -ENODEV; 2556 2557 scsi_transport_reserve_device(ahc_linux_transport_template, 2558 sizeof(struct ahc_linux_device)); 2559 2560 ahc_linux_pci_init(); 2561 ahc_linux_eisa_init(); 2562 return 0; 2563 } 2564 2565 static void 2566 ahc_linux_exit(void) 2567 { 2568 ahc_linux_pci_exit(); 2569 ahc_linux_eisa_exit(); 2570 spi_release_transport(ahc_linux_transport_template); 2571 } 2572 2573 module_init(ahc_linux_init); 2574 module_exit(ahc_linux_exit); 2575