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 struct ahc_initiator_tinfo *tinfo; 568 struct ahc_tmode_tstate *tstate; 569 char channel = starget->channel + 'A'; 570 unsigned int our_id = ahc->our_id; 571 unsigned int target_offset; 572 573 target_offset = starget->id; 574 if (starget->channel != 0) 575 target_offset += 8; 576 577 if (starget->channel) 578 our_id = ahc->our_id_b; 579 580 ahc_lock(ahc, &flags); 581 582 BUG_ON(*ahc_targp != NULL); 583 584 *ahc_targp = starget; 585 586 if (sc) { 587 int maxsync = AHC_SYNCRATE_DT; 588 int ultra = 0; 589 int flags = sc->device_flags[target_offset]; 590 591 if (ahc->flags & AHC_NEWEEPROM_FMT) { 592 if (flags & CFSYNCHISULTRA) 593 ultra = 1; 594 } else if (flags & CFULTRAEN) 595 ultra = 1; 596 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04 597 * change it to ultra=0, CFXFER = 0 */ 598 if(ultra && (flags & CFXFER) == 0x04) { 599 ultra = 0; 600 flags &= ~CFXFER; 601 } 602 603 if ((ahc->features & AHC_ULTRA2) != 0) { 604 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0); 605 } else { 606 scsirate = (flags & CFXFER) << 4; 607 maxsync = ultra ? AHC_SYNCRATE_ULTRA : 608 AHC_SYNCRATE_FAST; 609 } 610 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; 611 if (!(flags & CFSYNCH)) 612 spi_max_offset(starget) = 0; 613 spi_min_period(starget) = 614 ahc_find_period(ahc, scsirate, maxsync); 615 616 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id, 617 starget->id, &tstate); 618 } 619 ahc_compile_devinfo(&devinfo, our_id, starget->id, 620 CAM_LUN_WILDCARD, channel, 621 ROLE_INITIATOR); 622 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0, 623 AHC_TRANS_GOAL, /*paused*/FALSE); 624 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 625 AHC_TRANS_GOAL, /*paused*/FALSE); 626 ahc_unlock(ahc, &flags); 627 628 return 0; 629 } 630 631 static void 632 ahc_linux_target_destroy(struct scsi_target *starget) 633 { 634 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); 635 636 *ahc_targp = NULL; 637 } 638 639 static int 640 ahc_linux_slave_alloc(struct scsi_device *sdev) 641 { 642 struct ahc_softc *ahc = 643 *((struct ahc_softc **)sdev->host->hostdata); 644 struct scsi_target *starget = sdev->sdev_target; 645 struct ahc_linux_device *dev; 646 647 if (bootverbose) 648 printk("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id); 649 650 dev = scsi_transport_device_data(sdev); 651 memset(dev, 0, sizeof(*dev)); 652 653 /* 654 * We start out life using untagged 655 * transactions of which we allow one. 656 */ 657 dev->openings = 1; 658 659 /* 660 * Set maxtags to 0. This will be changed if we 661 * later determine that we are dealing with 662 * a tagged queuing capable device. 663 */ 664 dev->maxtags = 0; 665 666 spi_period(starget) = 0; 667 668 return 0; 669 } 670 671 static int 672 ahc_linux_slave_configure(struct scsi_device *sdev) 673 { 674 struct ahc_softc *ahc; 675 676 ahc = *((struct ahc_softc **)sdev->host->hostdata); 677 678 if (bootverbose) 679 sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); 680 681 ahc_linux_device_queue_depth(sdev); 682 683 /* Initial Domain Validation */ 684 if (!spi_initial_dv(sdev->sdev_target)) 685 spi_dv_device(sdev); 686 687 return 0; 688 } 689 690 #if defined(__i386__) 691 /* 692 * Return the disk geometry for the given SCSI device. 693 */ 694 static int 695 ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 696 sector_t capacity, int geom[]) 697 { 698 uint8_t *bh; 699 int heads; 700 int sectors; 701 int cylinders; 702 int ret; 703 int extended; 704 struct ahc_softc *ahc; 705 u_int channel; 706 707 ahc = *((struct ahc_softc **)sdev->host->hostdata); 708 channel = sdev_channel(sdev); 709 710 bh = scsi_bios_ptable(bdev); 711 if (bh) { 712 ret = scsi_partsize(bh, capacity, 713 &geom[2], &geom[0], &geom[1]); 714 kfree(bh); 715 if (ret != -1) 716 return (ret); 717 } 718 heads = 64; 719 sectors = 32; 720 cylinders = aic_sector_div(capacity, heads, sectors); 721 722 if (aic7xxx_extended != 0) 723 extended = 1; 724 else if (channel == 0) 725 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0; 726 else 727 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0; 728 if (extended && cylinders >= 1024) { 729 heads = 255; 730 sectors = 63; 731 cylinders = aic_sector_div(capacity, heads, sectors); 732 } 733 geom[0] = heads; 734 geom[1] = sectors; 735 geom[2] = cylinders; 736 return (0); 737 } 738 #endif 739 740 /* 741 * Abort the current SCSI command(s). 742 */ 743 static int 744 ahc_linux_abort(struct scsi_cmnd *cmd) 745 { 746 int error; 747 748 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT); 749 if (error != 0) 750 printk("aic7xxx_abort returns 0x%x\n", error); 751 return (error); 752 } 753 754 /* 755 * Attempt to send a target reset message to the device that timed out. 756 */ 757 static int 758 ahc_linux_dev_reset(struct scsi_cmnd *cmd) 759 { 760 int error; 761 762 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET); 763 if (error != 0) 764 printk("aic7xxx_dev_reset returns 0x%x\n", error); 765 return (error); 766 } 767 768 /* 769 * Reset the SCSI bus. 770 */ 771 static int 772 ahc_linux_bus_reset(struct scsi_cmnd *cmd) 773 { 774 struct ahc_softc *ahc; 775 int found; 776 unsigned long flags; 777 778 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 779 780 ahc_lock(ahc, &flags); 781 found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A', 782 /*initiate reset*/TRUE); 783 ahc_unlock(ahc, &flags); 784 785 if (bootverbose) 786 printk("%s: SCSI bus reset delivered. " 787 "%d SCBs aborted.\n", ahc_name(ahc), found); 788 789 return SUCCESS; 790 } 791 792 struct scsi_host_template aic7xxx_driver_template = { 793 .module = THIS_MODULE, 794 .name = "aic7xxx", 795 .proc_name = "aic7xxx", 796 .show_info = ahc_linux_show_info, 797 .write_info = ahc_proc_write_seeprom, 798 .info = ahc_linux_info, 799 .queuecommand = ahc_linux_queue, 800 .eh_abort_handler = ahc_linux_abort, 801 .eh_device_reset_handler = ahc_linux_dev_reset, 802 .eh_bus_reset_handler = ahc_linux_bus_reset, 803 #if defined(__i386__) 804 .bios_param = ahc_linux_biosparam, 805 #endif 806 .can_queue = AHC_MAX_QUEUE, 807 .this_id = -1, 808 .max_sectors = 8192, 809 .cmd_per_lun = 2, 810 .use_clustering = ENABLE_CLUSTERING, 811 .slave_alloc = ahc_linux_slave_alloc, 812 .slave_configure = ahc_linux_slave_configure, 813 .target_alloc = ahc_linux_target_alloc, 814 .target_destroy = ahc_linux_target_destroy, 815 .use_blk_tags = 1, 816 }; 817 818 /**************************** Tasklet Handler *********************************/ 819 820 /******************************** Macros **************************************/ 821 #define BUILD_SCSIID(ahc, cmd) \ 822 ((((cmd)->device->id << TID_SHIFT) & TID) \ 823 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \ 824 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB)) 825 826 /******************************** Bus DMA *************************************/ 827 int 828 ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent, 829 bus_size_t alignment, bus_size_t boundary, 830 dma_addr_t lowaddr, dma_addr_t highaddr, 831 bus_dma_filter_t *filter, void *filterarg, 832 bus_size_t maxsize, int nsegments, 833 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 834 { 835 bus_dma_tag_t dmat; 836 837 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC); 838 if (dmat == NULL) 839 return (ENOMEM); 840 841 /* 842 * Linux is very simplistic about DMA memory. For now don't 843 * maintain all specification information. Once Linux supplies 844 * better facilities for doing these operations, or the 845 * needs of this particular driver change, we might need to do 846 * more here. 847 */ 848 dmat->alignment = alignment; 849 dmat->boundary = boundary; 850 dmat->maxsize = maxsize; 851 *ret_tag = dmat; 852 return (0); 853 } 854 855 void 856 ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat) 857 { 858 kfree(dmat); 859 } 860 861 int 862 ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr, 863 int flags, bus_dmamap_t *mapp) 864 { 865 *vaddr = pci_alloc_consistent(ahc->dev_softc, 866 dmat->maxsize, mapp); 867 if (*vaddr == NULL) 868 return ENOMEM; 869 return 0; 870 } 871 872 void 873 ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat, 874 void* vaddr, bus_dmamap_t map) 875 { 876 pci_free_consistent(ahc->dev_softc, dmat->maxsize, 877 vaddr, map); 878 } 879 880 int 881 ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map, 882 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 883 void *cb_arg, int flags) 884 { 885 /* 886 * Assume for now that this will only be used during 887 * initialization and not for per-transaction buffer mapping. 888 */ 889 bus_dma_segment_t stack_sg; 890 891 stack_sg.ds_addr = map; 892 stack_sg.ds_len = dmat->maxsize; 893 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 894 return (0); 895 } 896 897 void 898 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 899 { 900 } 901 902 int 903 ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 904 { 905 /* Nothing to do */ 906 return (0); 907 } 908 909 static void 910 ahc_linux_setup_tag_info_global(char *p) 911 { 912 int tags, i, j; 913 914 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 915 printk("Setting Global Tags= %d\n", tags); 916 917 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) { 918 for (j = 0; j < AHC_NUM_TARGETS; j++) { 919 aic7xxx_tag_info[i].tag_commands[j] = tags; 920 } 921 } 922 } 923 924 static void 925 ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 926 { 927 928 if ((instance >= 0) && (targ >= 0) 929 && (instance < ARRAY_SIZE(aic7xxx_tag_info)) 930 && (targ < AHC_NUM_TARGETS)) { 931 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff; 932 if (bootverbose) 933 printk("tag_info[%d:%d] = %d\n", instance, targ, value); 934 } 935 } 936 937 static char * 938 ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 939 void (*callback)(u_long, int, int, int32_t), 940 u_long callback_arg) 941 { 942 char *tok_end; 943 char *tok_end2; 944 int i; 945 int instance; 946 int targ; 947 int done; 948 char tok_list[] = {'.', ',', '{', '}', '\0'}; 949 950 /* All options use a ':' name/arg separator */ 951 if (*opt_arg != ':') 952 return (opt_arg); 953 opt_arg++; 954 instance = -1; 955 targ = -1; 956 done = FALSE; 957 /* 958 * Restore separator that may be in 959 * the middle of our option argument. 960 */ 961 tok_end = strchr(opt_arg, '\0'); 962 if (tok_end < end) 963 *tok_end = ','; 964 while (!done) { 965 switch (*opt_arg) { 966 case '{': 967 if (instance == -1) { 968 instance = 0; 969 } else { 970 if (depth > 1) { 971 if (targ == -1) 972 targ = 0; 973 } else { 974 printk("Malformed Option %s\n", 975 opt_name); 976 done = TRUE; 977 } 978 } 979 opt_arg++; 980 break; 981 case '}': 982 if (targ != -1) 983 targ = -1; 984 else if (instance != -1) 985 instance = -1; 986 opt_arg++; 987 break; 988 case ',': 989 case '.': 990 if (instance == -1) 991 done = TRUE; 992 else if (targ >= 0) 993 targ++; 994 else if (instance >= 0) 995 instance++; 996 opt_arg++; 997 break; 998 case '\0': 999 done = TRUE; 1000 break; 1001 default: 1002 tok_end = end; 1003 for (i = 0; tok_list[i]; i++) { 1004 tok_end2 = strchr(opt_arg, tok_list[i]); 1005 if ((tok_end2) && (tok_end2 < tok_end)) 1006 tok_end = tok_end2; 1007 } 1008 callback(callback_arg, instance, targ, 1009 simple_strtol(opt_arg, NULL, 0)); 1010 opt_arg = tok_end; 1011 break; 1012 } 1013 } 1014 return (opt_arg); 1015 } 1016 1017 /* 1018 * Handle Linux boot parameters. This routine allows for assigning a value 1019 * to a parameter with a ':' between the parameter and the value. 1020 * ie. aic7xxx=stpwlev:1,extended 1021 */ 1022 static int 1023 aic7xxx_setup(char *s) 1024 { 1025 int i, n; 1026 char *p; 1027 char *end; 1028 1029 static const struct { 1030 const char *name; 1031 uint32_t *flag; 1032 } options[] = { 1033 { "extended", &aic7xxx_extended }, 1034 { "no_reset", &aic7xxx_no_reset }, 1035 { "verbose", &aic7xxx_verbose }, 1036 { "allow_memio", &aic7xxx_allow_memio}, 1037 #ifdef AHC_DEBUG 1038 { "debug", &ahc_debug }, 1039 #endif 1040 { "periodic_otag", &aic7xxx_periodic_otag }, 1041 { "pci_parity", &aic7xxx_pci_parity }, 1042 { "seltime", &aic7xxx_seltime }, 1043 { "tag_info", NULL }, 1044 { "global_tag_depth", NULL }, 1045 { "dv", NULL } 1046 }; 1047 1048 end = strchr(s, '\0'); 1049 1050 /* 1051 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE 1052 * will never be 0 in this case. 1053 */ 1054 n = 0; 1055 1056 while ((p = strsep(&s, ",.")) != NULL) { 1057 if (*p == '\0') 1058 continue; 1059 for (i = 0; i < ARRAY_SIZE(options); i++) { 1060 1061 n = strlen(options[i].name); 1062 if (strncmp(options[i].name, p, n) == 0) 1063 break; 1064 } 1065 if (i == ARRAY_SIZE(options)) 1066 continue; 1067 1068 if (strncmp(p, "global_tag_depth", n) == 0) { 1069 ahc_linux_setup_tag_info_global(p + n); 1070 } else if (strncmp(p, "tag_info", n) == 0) { 1071 s = ahc_parse_brace_option("tag_info", p + n, end, 1072 2, ahc_linux_setup_tag_info, 0); 1073 } else if (p[n] == ':') { 1074 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1075 } else if (strncmp(p, "verbose", n) == 0) { 1076 *(options[i].flag) = 1; 1077 } else { 1078 *(options[i].flag) ^= 0xFFFFFFFF; 1079 } 1080 } 1081 return 1; 1082 } 1083 1084 __setup("aic7xxx=", aic7xxx_setup); 1085 1086 uint32_t aic7xxx_verbose; 1087 1088 int 1089 ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template) 1090 { 1091 char buf[80]; 1092 struct Scsi_Host *host; 1093 char *new_name; 1094 u_long s; 1095 int retval; 1096 1097 template->name = ahc->description; 1098 host = scsi_host_alloc(template, sizeof(struct ahc_softc *)); 1099 if (host == NULL) 1100 return (ENOMEM); 1101 1102 *((struct ahc_softc **)host->hostdata) = ahc; 1103 ahc->platform_data->host = host; 1104 host->can_queue = AHC_MAX_QUEUE; 1105 host->cmd_per_lun = 2; 1106 /* XXX No way to communicate the ID for multiple channels */ 1107 host->this_id = ahc->our_id; 1108 host->irq = ahc->platform_data->irq; 1109 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8; 1110 host->max_lun = AHC_NUM_LUNS; 1111 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0; 1112 host->sg_tablesize = AHC_NSEG; 1113 ahc_lock(ahc, &s); 1114 ahc_set_unit(ahc, ahc_linux_unit++); 1115 ahc_unlock(ahc, &s); 1116 sprintf(buf, "scsi%d", host->host_no); 1117 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC); 1118 if (new_name != NULL) { 1119 strcpy(new_name, buf); 1120 ahc_set_name(ahc, new_name); 1121 } 1122 host->unique_id = ahc->unit; 1123 ahc_linux_initialize_scsi_bus(ahc); 1124 ahc_intr_enable(ahc, TRUE); 1125 1126 host->transportt = ahc_linux_transport_template; 1127 1128 retval = scsi_add_host(host, 1129 (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); 1130 if (retval) { 1131 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n"); 1132 scsi_host_put(host); 1133 return retval; 1134 } 1135 1136 scsi_scan_host(host); 1137 return 0; 1138 } 1139 1140 /* 1141 * Place the SCSI bus into a known state by either resetting it, 1142 * or forcing transfer negotiations on the next command to any 1143 * target. 1144 */ 1145 void 1146 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc) 1147 { 1148 int i; 1149 int numtarg; 1150 unsigned long s; 1151 1152 i = 0; 1153 numtarg = 0; 1154 1155 ahc_lock(ahc, &s); 1156 1157 if (aic7xxx_no_reset != 0) 1158 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B); 1159 1160 if ((ahc->flags & AHC_RESET_BUS_A) != 0) 1161 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE); 1162 else 1163 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8; 1164 1165 if ((ahc->features & AHC_TWIN) != 0) { 1166 1167 if ((ahc->flags & AHC_RESET_BUS_B) != 0) { 1168 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE); 1169 } else { 1170 if (numtarg == 0) 1171 i = 8; 1172 numtarg += 8; 1173 } 1174 } 1175 1176 /* 1177 * Force negotiation to async for all targets that 1178 * will not see an initial bus reset. 1179 */ 1180 for (; i < numtarg; i++) { 1181 struct ahc_devinfo devinfo; 1182 struct ahc_initiator_tinfo *tinfo; 1183 struct ahc_tmode_tstate *tstate; 1184 u_int our_id; 1185 u_int target_id; 1186 char channel; 1187 1188 channel = 'A'; 1189 our_id = ahc->our_id; 1190 target_id = i; 1191 if (i > 7 && (ahc->features & AHC_TWIN) != 0) { 1192 channel = 'B'; 1193 our_id = ahc->our_id_b; 1194 target_id = i % 8; 1195 } 1196 tinfo = ahc_fetch_transinfo(ahc, channel, our_id, 1197 target_id, &tstate); 1198 ahc_compile_devinfo(&devinfo, our_id, target_id, 1199 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR); 1200 ahc_update_neg_request(ahc, &devinfo, tstate, 1201 tinfo, AHC_NEG_ALWAYS); 1202 } 1203 ahc_unlock(ahc, &s); 1204 /* Give the bus some time to recover */ 1205 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) { 1206 ahc_linux_freeze_simq(ahc); 1207 msleep(AIC7XXX_RESET_DELAY); 1208 ahc_linux_release_simq(ahc); 1209 } 1210 } 1211 1212 int 1213 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg) 1214 { 1215 1216 ahc->platform_data = 1217 kmalloc(sizeof(struct ahc_platform_data), GFP_ATOMIC); 1218 if (ahc->platform_data == NULL) 1219 return (ENOMEM); 1220 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data)); 1221 ahc->platform_data->irq = AHC_LINUX_NOIRQ; 1222 ahc_lockinit(ahc); 1223 ahc->seltime = (aic7xxx_seltime & 0x3) << 4; 1224 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4; 1225 if (aic7xxx_pci_parity == 0) 1226 ahc->flags |= AHC_DISABLE_PCI_PERR; 1227 1228 return (0); 1229 } 1230 1231 void 1232 ahc_platform_free(struct ahc_softc *ahc) 1233 { 1234 struct scsi_target *starget; 1235 int i; 1236 1237 if (ahc->platform_data != NULL) { 1238 /* destroy all of the device and target objects */ 1239 for (i = 0; i < AHC_NUM_TARGETS; i++) { 1240 starget = ahc->platform_data->starget[i]; 1241 if (starget != NULL) { 1242 ahc->platform_data->starget[i] = NULL; 1243 } 1244 } 1245 1246 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ) 1247 free_irq(ahc->platform_data->irq, ahc); 1248 if (ahc->tag == BUS_SPACE_PIO 1249 && ahc->bsh.ioport != 0) 1250 release_region(ahc->bsh.ioport, 256); 1251 if (ahc->tag == BUS_SPACE_MEMIO 1252 && ahc->bsh.maddr != NULL) { 1253 iounmap(ahc->bsh.maddr); 1254 release_mem_region(ahc->platform_data->mem_busaddr, 1255 0x1000); 1256 } 1257 1258 if (ahc->platform_data->host) 1259 scsi_host_put(ahc->platform_data->host); 1260 1261 kfree(ahc->platform_data); 1262 } 1263 } 1264 1265 void 1266 ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb) 1267 { 1268 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb), 1269 SCB_GET_CHANNEL(ahc, scb), 1270 SCB_GET_LUN(scb), SCB_LIST_NULL, 1271 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1272 } 1273 1274 void 1275 ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev, 1276 struct ahc_devinfo *devinfo, ahc_queue_alg alg) 1277 { 1278 struct ahc_linux_device *dev; 1279 int was_queuing; 1280 int now_queuing; 1281 1282 if (sdev == NULL) 1283 return; 1284 dev = scsi_transport_device_data(sdev); 1285 1286 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED); 1287 switch (alg) { 1288 default: 1289 case AHC_QUEUE_NONE: 1290 now_queuing = 0; 1291 break; 1292 case AHC_QUEUE_BASIC: 1293 now_queuing = AHC_DEV_Q_BASIC; 1294 break; 1295 case AHC_QUEUE_TAGGED: 1296 now_queuing = AHC_DEV_Q_TAGGED; 1297 break; 1298 } 1299 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0 1300 && (was_queuing != now_queuing) 1301 && (dev->active != 0)) { 1302 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY; 1303 dev->qfrozen++; 1304 } 1305 1306 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG); 1307 if (now_queuing) { 1308 u_int usertags; 1309 1310 usertags = ahc_linux_user_tagdepth(ahc, devinfo); 1311 if (!was_queuing) { 1312 /* 1313 * Start out aggressively and allow our 1314 * dynamic queue depth algorithm to take 1315 * care of the rest. 1316 */ 1317 dev->maxtags = usertags; 1318 dev->openings = dev->maxtags - dev->active; 1319 } 1320 if (dev->maxtags == 0) { 1321 /* 1322 * Queueing is disabled by the user. 1323 */ 1324 dev->openings = 1; 1325 } else if (alg == AHC_QUEUE_TAGGED) { 1326 dev->flags |= AHC_DEV_Q_TAGGED; 1327 if (aic7xxx_periodic_otag != 0) 1328 dev->flags |= AHC_DEV_PERIODIC_OTAG; 1329 } else 1330 dev->flags |= AHC_DEV_Q_BASIC; 1331 } else { 1332 /* We can only have one opening. */ 1333 dev->maxtags = 0; 1334 dev->openings = 1 - dev->active; 1335 } 1336 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) { 1337 case AHC_DEV_Q_BASIC: 1338 case AHC_DEV_Q_TAGGED: 1339 scsi_change_queue_depth(sdev, 1340 dev->openings + dev->active); 1341 default: 1342 /* 1343 * We allow the OS to queue 2 untagged transactions to 1344 * us at any time even though we can only execute them 1345 * serially on the controller/device. This should 1346 * remove some latency. 1347 */ 1348 scsi_change_queue_depth(sdev, 2); 1349 break; 1350 } 1351 } 1352 1353 int 1354 ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel, 1355 int lun, u_int tag, role_t role, uint32_t status) 1356 { 1357 return 0; 1358 } 1359 1360 static u_int 1361 ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 1362 { 1363 static int warned_user; 1364 u_int tags; 1365 1366 tags = 0; 1367 if ((ahc->user_discenable & devinfo->target_mask) != 0) { 1368 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) { 1369 if (warned_user == 0) { 1370 1371 printk(KERN_WARNING 1372 "aic7xxx: WARNING: Insufficient tag_info instances\n" 1373 "aic7xxx: for installed controllers. Using defaults\n" 1374 "aic7xxx: Please update the aic7xxx_tag_info array in\n" 1375 "aic7xxx: the aic7xxx_osm..c source file.\n"); 1376 warned_user++; 1377 } 1378 tags = AHC_MAX_QUEUE; 1379 } else { 1380 adapter_tag_info_t *tag_info; 1381 1382 tag_info = &aic7xxx_tag_info[ahc->unit]; 1383 tags = tag_info->tag_commands[devinfo->target_offset]; 1384 if (tags > AHC_MAX_QUEUE) 1385 tags = AHC_MAX_QUEUE; 1386 } 1387 } 1388 return (tags); 1389 } 1390 1391 /* 1392 * Determines the queue depth for a given device. 1393 */ 1394 static void 1395 ahc_linux_device_queue_depth(struct scsi_device *sdev) 1396 { 1397 struct ahc_devinfo devinfo; 1398 u_int tags; 1399 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata); 1400 1401 ahc_compile_devinfo(&devinfo, 1402 sdev->sdev_target->channel == 0 1403 ? ahc->our_id : ahc->our_id_b, 1404 sdev->sdev_target->id, sdev->lun, 1405 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1406 ROLE_INITIATOR); 1407 tags = ahc_linux_user_tagdepth(ahc, &devinfo); 1408 if (tags != 0 && sdev->tagged_supported != 0) { 1409 1410 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED); 1411 ahc_send_async(ahc, devinfo.channel, devinfo.target, 1412 devinfo.lun, AC_TRANSFER_NEG); 1413 ahc_print_devinfo(ahc, &devinfo); 1414 printk("Tagged Queuing enabled. Depth %d\n", tags); 1415 } else { 1416 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE); 1417 ahc_send_async(ahc, devinfo.channel, devinfo.target, 1418 devinfo.lun, AC_TRANSFER_NEG); 1419 } 1420 } 1421 1422 static int 1423 ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev, 1424 struct scsi_cmnd *cmd) 1425 { 1426 struct scb *scb; 1427 struct hardware_scb *hscb; 1428 struct ahc_initiator_tinfo *tinfo; 1429 struct ahc_tmode_tstate *tstate; 1430 uint16_t mask; 1431 struct scb_tailq *untagged_q = NULL; 1432 int nseg; 1433 1434 /* 1435 * Schedule us to run later. The only reason we are not 1436 * running is because the whole controller Q is frozen. 1437 */ 1438 if (ahc->platform_data->qfrozen != 0) 1439 return SCSI_MLQUEUE_HOST_BUSY; 1440 1441 /* 1442 * We only allow one untagged transaction 1443 * per target in the initiator role unless 1444 * we are storing a full busy target *lun* 1445 * table in SCB space. 1446 */ 1447 if (!(cmd->flags & SCMD_TAGGED) 1448 && (ahc->features & AHC_SCB_BTT) == 0) { 1449 int target_offset; 1450 1451 target_offset = cmd->device->id + cmd->device->channel * 8; 1452 untagged_q = &(ahc->untagged_queues[target_offset]); 1453 if (!TAILQ_EMPTY(untagged_q)) 1454 /* if we're already executing an untagged command 1455 * we're busy to another */ 1456 return SCSI_MLQUEUE_DEVICE_BUSY; 1457 } 1458 1459 nseg = scsi_dma_map(cmd); 1460 if (nseg < 0) 1461 return SCSI_MLQUEUE_HOST_BUSY; 1462 1463 /* 1464 * Get an scb to use. 1465 */ 1466 scb = ahc_get_scb(ahc); 1467 if (!scb) { 1468 scsi_dma_unmap(cmd); 1469 return SCSI_MLQUEUE_HOST_BUSY; 1470 } 1471 1472 scb->io_ctx = cmd; 1473 scb->platform_data->dev = dev; 1474 hscb = scb->hscb; 1475 cmd->host_scribble = (char *)scb; 1476 1477 /* 1478 * Fill out basics of the HSCB. 1479 */ 1480 hscb->control = 0; 1481 hscb->scsiid = BUILD_SCSIID(ahc, cmd); 1482 hscb->lun = cmd->device->lun; 1483 mask = SCB_GET_TARGET_MASK(ahc, scb); 1484 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb), 1485 SCB_GET_OUR_ID(scb), 1486 SCB_GET_TARGET(ahc, scb), &tstate); 1487 hscb->scsirate = tinfo->scsirate; 1488 hscb->scsioffset = tinfo->curr.offset; 1489 if ((tstate->ultraenb & mask) != 0) 1490 hscb->control |= ULTRAENB; 1491 1492 if ((ahc->user_discenable & mask) != 0) 1493 hscb->control |= DISCENB; 1494 1495 if ((tstate->auto_negotiate & mask) != 0) { 1496 scb->flags |= SCB_AUTO_NEGOTIATE; 1497 scb->hscb->control |= MK_MESSAGE; 1498 } 1499 1500 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) { 1501 if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH 1502 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) { 1503 hscb->control |= MSG_ORDERED_TASK; 1504 dev->commands_since_idle_or_otag = 0; 1505 } else { 1506 hscb->control |= MSG_SIMPLE_TASK; 1507 } 1508 } 1509 1510 hscb->cdb_len = cmd->cmd_len; 1511 if (hscb->cdb_len <= 12) { 1512 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len); 1513 } else { 1514 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len); 1515 scb->flags |= SCB_CDB32_PTR; 1516 } 1517 1518 scb->platform_data->xfer_len = 0; 1519 ahc_set_residual(scb, 0); 1520 ahc_set_sense_residual(scb, 0); 1521 scb->sg_count = 0; 1522 1523 if (nseg > 0) { 1524 struct ahc_dma_seg *sg; 1525 struct scatterlist *cur_seg; 1526 int i; 1527 1528 /* Copy the segments into the SG list. */ 1529 sg = scb->sg_list; 1530 /* 1531 * The sg_count may be larger than nseg if 1532 * a transfer crosses a 32bit page. 1533 */ 1534 scsi_for_each_sg(cmd, cur_seg, nseg, i) { 1535 dma_addr_t addr; 1536 bus_size_t len; 1537 int consumed; 1538 1539 addr = sg_dma_address(cur_seg); 1540 len = sg_dma_len(cur_seg); 1541 consumed = ahc_linux_map_seg(ahc, scb, 1542 sg, addr, len); 1543 sg += consumed; 1544 scb->sg_count += consumed; 1545 } 1546 sg--; 1547 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); 1548 1549 /* 1550 * Reset the sg list pointer. 1551 */ 1552 scb->hscb->sgptr = 1553 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); 1554 1555 /* 1556 * Copy the first SG into the "current" 1557 * data pointer area. 1558 */ 1559 scb->hscb->dataptr = scb->sg_list->addr; 1560 scb->hscb->datacnt = scb->sg_list->len; 1561 } else { 1562 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL); 1563 scb->hscb->dataptr = 0; 1564 scb->hscb->datacnt = 0; 1565 scb->sg_count = 0; 1566 } 1567 1568 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links); 1569 dev->openings--; 1570 dev->active++; 1571 dev->commands_issued++; 1572 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0) 1573 dev->commands_since_idle_or_otag++; 1574 1575 scb->flags |= SCB_ACTIVE; 1576 if (untagged_q) { 1577 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe); 1578 scb->flags |= SCB_UNTAGGEDQ; 1579 } 1580 ahc_queue_scb(ahc, scb); 1581 return 0; 1582 } 1583 1584 /* 1585 * SCSI controller interrupt handler. 1586 */ 1587 irqreturn_t 1588 ahc_linux_isr(int irq, void *dev_id) 1589 { 1590 struct ahc_softc *ahc; 1591 u_long flags; 1592 int ours; 1593 1594 ahc = (struct ahc_softc *) dev_id; 1595 ahc_lock(ahc, &flags); 1596 ours = ahc_intr(ahc); 1597 ahc_unlock(ahc, &flags); 1598 return IRQ_RETVAL(ours); 1599 } 1600 1601 void 1602 ahc_platform_flushwork(struct ahc_softc *ahc) 1603 { 1604 1605 } 1606 1607 void 1608 ahc_send_async(struct ahc_softc *ahc, char channel, 1609 u_int target, u_int lun, ac_code code) 1610 { 1611 switch (code) { 1612 case AC_TRANSFER_NEG: 1613 { 1614 struct scsi_target *starget; 1615 struct ahc_linux_target *targ; 1616 struct ahc_initiator_tinfo *tinfo; 1617 struct ahc_tmode_tstate *tstate; 1618 int target_offset; 1619 unsigned int target_ppr_options; 1620 1621 BUG_ON(target == CAM_TARGET_WILDCARD); 1622 1623 tinfo = ahc_fetch_transinfo(ahc, channel, 1624 channel == 'A' ? ahc->our_id 1625 : ahc->our_id_b, 1626 target, &tstate); 1627 1628 /* 1629 * Don't bother reporting results while 1630 * negotiations are still pending. 1631 */ 1632 if (tinfo->curr.period != tinfo->goal.period 1633 || tinfo->curr.width != tinfo->goal.width 1634 || tinfo->curr.offset != tinfo->goal.offset 1635 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1636 if (bootverbose == 0) 1637 break; 1638 1639 /* 1640 * Don't bother reporting results that 1641 * are identical to those last reported. 1642 */ 1643 target_offset = target; 1644 if (channel == 'B') 1645 target_offset += 8; 1646 starget = ahc->platform_data->starget[target_offset]; 1647 if (starget == NULL) 1648 break; 1649 targ = scsi_transport_target_data(starget); 1650 1651 target_ppr_options = 1652 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1653 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1654 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0); 1655 1656 if (tinfo->curr.period == spi_period(starget) 1657 && tinfo->curr.width == spi_width(starget) 1658 && tinfo->curr.offset == spi_offset(starget) 1659 && tinfo->curr.ppr_options == target_ppr_options) 1660 if (bootverbose == 0) 1661 break; 1662 1663 spi_period(starget) = tinfo->curr.period; 1664 spi_width(starget) = tinfo->curr.width; 1665 spi_offset(starget) = tinfo->curr.offset; 1666 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1667 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1668 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1669 spi_display_xfer_agreement(starget); 1670 break; 1671 } 1672 case AC_SENT_BDR: 1673 { 1674 WARN_ON(lun != CAM_LUN_WILDCARD); 1675 scsi_report_device_reset(ahc->platform_data->host, 1676 channel - 'A', target); 1677 break; 1678 } 1679 case AC_BUS_RESET: 1680 if (ahc->platform_data->host != NULL) { 1681 scsi_report_bus_reset(ahc->platform_data->host, 1682 channel - 'A'); 1683 } 1684 break; 1685 default: 1686 panic("ahc_send_async: Unexpected async event"); 1687 } 1688 } 1689 1690 /* 1691 * Calls the higher level scsi done function and frees the scb. 1692 */ 1693 void 1694 ahc_done(struct ahc_softc *ahc, struct scb *scb) 1695 { 1696 struct scsi_cmnd *cmd; 1697 struct ahc_linux_device *dev; 1698 1699 LIST_REMOVE(scb, pending_links); 1700 if ((scb->flags & SCB_UNTAGGEDQ) != 0) { 1701 struct scb_tailq *untagged_q; 1702 int target_offset; 1703 1704 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); 1705 untagged_q = &(ahc->untagged_queues[target_offset]); 1706 TAILQ_REMOVE(untagged_q, scb, links.tqe); 1707 BUG_ON(!TAILQ_EMPTY(untagged_q)); 1708 } else if ((scb->flags & SCB_ACTIVE) == 0) { 1709 /* 1710 * Transactions aborted from the untagged queue may 1711 * not have been dispatched to the controller, so 1712 * only check the SCB_ACTIVE flag for tagged transactions. 1713 */ 1714 printk("SCB %d done'd twice\n", scb->hscb->tag); 1715 ahc_dump_card_state(ahc); 1716 panic("Stopping for safety"); 1717 } 1718 cmd = scb->io_ctx; 1719 dev = scb->platform_data->dev; 1720 dev->active--; 1721 dev->openings++; 1722 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1723 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1724 dev->qfrozen--; 1725 } 1726 ahc_linux_unmap_scb(ahc, scb); 1727 1728 /* 1729 * Guard against stale sense data. 1730 * The Linux mid-layer assumes that sense 1731 * was retrieved anytime the first byte of 1732 * the sense buffer looks "sane". 1733 */ 1734 cmd->sense_buffer[0] = 0; 1735 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) { 1736 uint32_t amount_xferred; 1737 1738 amount_xferred = 1739 ahc_get_transfer_length(scb) - ahc_get_residual(scb); 1740 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1741 #ifdef AHC_DEBUG 1742 if ((ahc_debug & AHC_SHOW_MISC) != 0) { 1743 ahc_print_path(ahc, scb); 1744 printk("Set CAM_UNCOR_PARITY\n"); 1745 } 1746 #endif 1747 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY); 1748 #ifdef AHC_REPORT_UNDERFLOWS 1749 /* 1750 * This code is disabled by default as some 1751 * clients of the SCSI system do not properly 1752 * initialize the underflow parameter. This 1753 * results in spurious termination of commands 1754 * that complete as expected (e.g. underflow is 1755 * allowed as command can return variable amounts 1756 * of data. 1757 */ 1758 } else if (amount_xferred < scb->io_ctx->underflow) { 1759 u_int i; 1760 1761 ahc_print_path(ahc, scb); 1762 printk("CDB:"); 1763 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1764 printk(" 0x%x", scb->io_ctx->cmnd[i]); 1765 printk("\n"); 1766 ahc_print_path(ahc, scb); 1767 printk("Saw underflow (%ld of %ld bytes). " 1768 "Treated as error\n", 1769 ahc_get_residual(scb), 1770 ahc_get_transfer_length(scb)); 1771 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1772 #endif 1773 } else { 1774 ahc_set_transaction_status(scb, CAM_REQ_CMP); 1775 } 1776 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1777 ahc_linux_handle_scsi_status(ahc, cmd->device, scb); 1778 } 1779 1780 if (dev->openings == 1 1781 && ahc_get_transaction_status(scb) == CAM_REQ_CMP 1782 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1783 dev->tag_success_count++; 1784 /* 1785 * Some devices deal with temporary internal resource 1786 * shortages by returning queue full. When the queue 1787 * full occurrs, we throttle back. Slowly try to get 1788 * back to our previous queue depth. 1789 */ 1790 if ((dev->openings + dev->active) < dev->maxtags 1791 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) { 1792 dev->tag_success_count = 0; 1793 dev->openings++; 1794 } 1795 1796 if (dev->active == 0) 1797 dev->commands_since_idle_or_otag = 0; 1798 1799 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1800 printk("Recovery SCB completes\n"); 1801 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT 1802 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED) 1803 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1804 1805 if (ahc->platform_data->eh_done) 1806 complete(ahc->platform_data->eh_done); 1807 } 1808 1809 ahc_free_scb(ahc, scb); 1810 ahc_linux_queue_cmd_complete(ahc, cmd); 1811 } 1812 1813 static void 1814 ahc_linux_handle_scsi_status(struct ahc_softc *ahc, 1815 struct scsi_device *sdev, struct scb *scb) 1816 { 1817 struct ahc_devinfo devinfo; 1818 struct ahc_linux_device *dev = scsi_transport_device_data(sdev); 1819 1820 ahc_compile_devinfo(&devinfo, 1821 ahc->our_id, 1822 sdev->sdev_target->id, sdev->lun, 1823 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1824 ROLE_INITIATOR); 1825 1826 /* 1827 * We don't currently trust the mid-layer to 1828 * properly deal with queue full or busy. So, 1829 * when one occurs, we tell the mid-layer to 1830 * unconditionally requeue the command to us 1831 * so that we can retry it ourselves. We also 1832 * implement our own throttling mechanism so 1833 * we don't clobber the device with too many 1834 * commands. 1835 */ 1836 switch (ahc_get_scsi_status(scb)) { 1837 default: 1838 break; 1839 case SCSI_STATUS_CHECK_COND: 1840 case SCSI_STATUS_CMD_TERMINATED: 1841 { 1842 struct scsi_cmnd *cmd; 1843 1844 /* 1845 * Copy sense information to the OS's cmd 1846 * structure if it is available. 1847 */ 1848 cmd = scb->io_ctx; 1849 if (scb->flags & SCB_SENSE) { 1850 u_int sense_size; 1851 1852 sense_size = min(sizeof(struct scsi_sense_data) 1853 - ahc_get_sense_residual(scb), 1854 (u_long)SCSI_SENSE_BUFFERSIZE); 1855 memcpy(cmd->sense_buffer, 1856 ahc_get_sense_buf(ahc, scb), sense_size); 1857 if (sense_size < SCSI_SENSE_BUFFERSIZE) 1858 memset(&cmd->sense_buffer[sense_size], 0, 1859 SCSI_SENSE_BUFFERSIZE - sense_size); 1860 cmd->result |= (DRIVER_SENSE << 24); 1861 #ifdef AHC_DEBUG 1862 if (ahc_debug & AHC_SHOW_SENSE) { 1863 int i; 1864 1865 printk("Copied %d bytes of sense data:", 1866 sense_size); 1867 for (i = 0; i < sense_size; i++) { 1868 if ((i & 0xF) == 0) 1869 printk("\n"); 1870 printk("0x%x ", cmd->sense_buffer[i]); 1871 } 1872 printk("\n"); 1873 } 1874 #endif 1875 } 1876 break; 1877 } 1878 case SCSI_STATUS_QUEUE_FULL: 1879 { 1880 /* 1881 * By the time the core driver has returned this 1882 * command, all other commands that were queued 1883 * to us but not the device have been returned. 1884 * This ensures that dev->active is equal to 1885 * the number of commands actually queued to 1886 * the device. 1887 */ 1888 dev->tag_success_count = 0; 1889 if (dev->active != 0) { 1890 /* 1891 * Drop our opening count to the number 1892 * of commands currently outstanding. 1893 */ 1894 dev->openings = 0; 1895 /* 1896 ahc_print_path(ahc, scb); 1897 printk("Dropping tag count to %d\n", dev->active); 1898 */ 1899 if (dev->active == dev->tags_on_last_queuefull) { 1900 1901 dev->last_queuefull_same_count++; 1902 /* 1903 * If we repeatedly see a queue full 1904 * at the same queue depth, this 1905 * device has a fixed number of tag 1906 * slots. Lock in this tag depth 1907 * so we stop seeing queue fulls from 1908 * this device. 1909 */ 1910 if (dev->last_queuefull_same_count 1911 == AHC_LOCK_TAGS_COUNT) { 1912 dev->maxtags = dev->active; 1913 ahc_print_path(ahc, scb); 1914 printk("Locking max tag count at %d\n", 1915 dev->active); 1916 } 1917 } else { 1918 dev->tags_on_last_queuefull = dev->active; 1919 dev->last_queuefull_same_count = 0; 1920 } 1921 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ); 1922 ahc_set_scsi_status(scb, SCSI_STATUS_OK); 1923 ahc_platform_set_tags(ahc, sdev, &devinfo, 1924 (dev->flags & AHC_DEV_Q_BASIC) 1925 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1926 break; 1927 } 1928 /* 1929 * Drop down to a single opening, and treat this 1930 * as if the target returned BUSY SCSI status. 1931 */ 1932 dev->openings = 1; 1933 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY); 1934 ahc_platform_set_tags(ahc, sdev, &devinfo, 1935 (dev->flags & AHC_DEV_Q_BASIC) 1936 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1937 break; 1938 } 1939 } 1940 } 1941 1942 static void 1943 ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd) 1944 { 1945 /* 1946 * Map CAM error codes into Linux Error codes. We 1947 * avoid the conversion so that the DV code has the 1948 * full error information available when making 1949 * state change decisions. 1950 */ 1951 { 1952 u_int new_status; 1953 1954 switch (ahc_cmd_get_transaction_status(cmd)) { 1955 case CAM_REQ_INPROG: 1956 case CAM_REQ_CMP: 1957 case CAM_SCSI_STATUS_ERROR: 1958 new_status = DID_OK; 1959 break; 1960 case CAM_REQ_ABORTED: 1961 new_status = DID_ABORT; 1962 break; 1963 case CAM_BUSY: 1964 new_status = DID_BUS_BUSY; 1965 break; 1966 case CAM_REQ_INVALID: 1967 case CAM_PATH_INVALID: 1968 new_status = DID_BAD_TARGET; 1969 break; 1970 case CAM_SEL_TIMEOUT: 1971 new_status = DID_NO_CONNECT; 1972 break; 1973 case CAM_SCSI_BUS_RESET: 1974 case CAM_BDR_SENT: 1975 new_status = DID_RESET; 1976 break; 1977 case CAM_UNCOR_PARITY: 1978 new_status = DID_PARITY; 1979 break; 1980 case CAM_CMD_TIMEOUT: 1981 new_status = DID_TIME_OUT; 1982 break; 1983 case CAM_UA_ABORT: 1984 case CAM_REQ_CMP_ERR: 1985 case CAM_AUTOSENSE_FAIL: 1986 case CAM_NO_HBA: 1987 case CAM_DATA_RUN_ERR: 1988 case CAM_UNEXP_BUSFREE: 1989 case CAM_SEQUENCE_FAIL: 1990 case CAM_CCB_LEN_ERR: 1991 case CAM_PROVIDE_FAIL: 1992 case CAM_REQ_TERMIO: 1993 case CAM_UNREC_HBA_ERROR: 1994 case CAM_REQ_TOO_BIG: 1995 new_status = DID_ERROR; 1996 break; 1997 case CAM_REQUEUE_REQ: 1998 new_status = DID_REQUEUE; 1999 break; 2000 default: 2001 /* We should never get here */ 2002 new_status = DID_ERROR; 2003 break; 2004 } 2005 2006 ahc_cmd_set_transaction_status(cmd, new_status); 2007 } 2008 2009 cmd->scsi_done(cmd); 2010 } 2011 2012 static void 2013 ahc_linux_freeze_simq(struct ahc_softc *ahc) 2014 { 2015 unsigned long s; 2016 2017 ahc_lock(ahc, &s); 2018 ahc->platform_data->qfrozen++; 2019 if (ahc->platform_data->qfrozen == 1) { 2020 scsi_block_requests(ahc->platform_data->host); 2021 2022 /* XXX What about Twin channels? */ 2023 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, 2024 CAM_LUN_WILDCARD, SCB_LIST_NULL, 2025 ROLE_INITIATOR, CAM_REQUEUE_REQ); 2026 } 2027 ahc_unlock(ahc, &s); 2028 } 2029 2030 static void 2031 ahc_linux_release_simq(struct ahc_softc *ahc) 2032 { 2033 u_long s; 2034 int unblock_reqs; 2035 2036 unblock_reqs = 0; 2037 ahc_lock(ahc, &s); 2038 if (ahc->platform_data->qfrozen > 0) 2039 ahc->platform_data->qfrozen--; 2040 if (ahc->platform_data->qfrozen == 0) 2041 unblock_reqs = 1; 2042 ahc_unlock(ahc, &s); 2043 /* 2044 * There is still a race here. The mid-layer 2045 * should keep its own freeze count and use 2046 * a bottom half handler to run the queues 2047 * so we can unblock with our own lock held. 2048 */ 2049 if (unblock_reqs) 2050 scsi_unblock_requests(ahc->platform_data->host); 2051 } 2052 2053 static int 2054 ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag) 2055 { 2056 struct ahc_softc *ahc; 2057 struct ahc_linux_device *dev; 2058 struct scb *pending_scb; 2059 u_int saved_scbptr; 2060 u_int active_scb_index; 2061 u_int last_phase; 2062 u_int saved_scsiid; 2063 u_int cdb_byte; 2064 int retval; 2065 int was_paused; 2066 int paused; 2067 int wait; 2068 int disconnected; 2069 unsigned long flags; 2070 2071 pending_scb = NULL; 2072 paused = FALSE; 2073 wait = FALSE; 2074 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 2075 2076 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n", 2077 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET"); 2078 2079 printk("CDB:"); 2080 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2081 printk(" 0x%x", cmd->cmnd[cdb_byte]); 2082 printk("\n"); 2083 2084 ahc_lock(ahc, &flags); 2085 2086 /* 2087 * First determine if we currently own this command. 2088 * Start by searching the device queue. If not found 2089 * there, check the pending_scb list. If not found 2090 * at all, and the system wanted us to just abort the 2091 * command, return success. 2092 */ 2093 dev = scsi_transport_device_data(cmd->device); 2094 2095 if (dev == NULL) { 2096 /* 2097 * No target device for this command exists, 2098 * so we must not still own the command. 2099 */ 2100 printk("%s:%d:%d:%d: Is not an active device\n", 2101 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2102 (u8)cmd->device->lun); 2103 retval = SUCCESS; 2104 goto no_cmd; 2105 } 2106 2107 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0 2108 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id, 2109 cmd->device->channel + 'A', 2110 (u8)cmd->device->lun, 2111 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) { 2112 printk("%s:%d:%d:%d: Command found on untagged queue\n", 2113 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2114 (u8)cmd->device->lun); 2115 retval = SUCCESS; 2116 goto done; 2117 } 2118 2119 /* 2120 * See if we can find a matching cmd in the pending list. 2121 */ 2122 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2123 if (pending_scb->io_ctx == cmd) 2124 break; 2125 } 2126 2127 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) { 2128 2129 /* Any SCB for this device will do for a target reset */ 2130 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2131 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd), 2132 scmd_channel(cmd) + 'A', 2133 CAM_LUN_WILDCARD, 2134 SCB_LIST_NULL, ROLE_INITIATOR)) 2135 break; 2136 } 2137 } 2138 2139 if (pending_scb == NULL) { 2140 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2141 goto no_cmd; 2142 } 2143 2144 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2145 /* 2146 * We can't queue two recovery actions using the same SCB 2147 */ 2148 retval = FAILED; 2149 goto done; 2150 } 2151 2152 /* 2153 * Ensure that the card doesn't do anything 2154 * behind our back and that we didn't "just" miss 2155 * an interrupt that would affect this cmd. 2156 */ 2157 was_paused = ahc_is_paused(ahc); 2158 ahc_pause_and_flushwork(ahc); 2159 paused = TRUE; 2160 2161 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2162 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2163 goto no_cmd; 2164 } 2165 2166 printk("%s: At time of recovery, card was %spaused\n", 2167 ahc_name(ahc), was_paused ? "" : "not "); 2168 ahc_dump_card_state(ahc); 2169 2170 disconnected = TRUE; 2171 if (flag == SCB_ABORT) { 2172 if (ahc_search_qinfifo(ahc, cmd->device->id, 2173 cmd->device->channel + 'A', 2174 cmd->device->lun, 2175 pending_scb->hscb->tag, 2176 ROLE_INITIATOR, CAM_REQ_ABORTED, 2177 SEARCH_COMPLETE) > 0) { 2178 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2179 ahc_name(ahc), cmd->device->channel, 2180 cmd->device->id, (u8)cmd->device->lun); 2181 retval = SUCCESS; 2182 goto done; 2183 } 2184 } else if (ahc_search_qinfifo(ahc, cmd->device->id, 2185 cmd->device->channel + 'A', 2186 cmd->device->lun, 2187 pending_scb->hscb->tag, 2188 ROLE_INITIATOR, /*status*/0, 2189 SEARCH_COUNT) > 0) { 2190 disconnected = FALSE; 2191 } 2192 2193 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2194 struct scb *bus_scb; 2195 2196 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG)); 2197 if (bus_scb == pending_scb) 2198 disconnected = FALSE; 2199 else if (flag != SCB_ABORT 2200 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid 2201 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb)) 2202 disconnected = FALSE; 2203 } 2204 2205 /* 2206 * At this point, pending_scb is the scb associated with the 2207 * passed in command. That command is currently active on the 2208 * bus, is in the disconnected state, or we're hoping to find 2209 * a command for the same target active on the bus to abuse to 2210 * send a BDR. Queue the appropriate message based on which of 2211 * these states we are in. 2212 */ 2213 last_phase = ahc_inb(ahc, LASTPHASE); 2214 saved_scbptr = ahc_inb(ahc, SCBPTR); 2215 active_scb_index = ahc_inb(ahc, SCB_TAG); 2216 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); 2217 if (last_phase != P_BUSFREE 2218 && (pending_scb->hscb->tag == active_scb_index 2219 || (flag == SCB_DEVICE_RESET 2220 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) { 2221 2222 /* 2223 * We're active on the bus, so assert ATN 2224 * and hope that the target responds. 2225 */ 2226 pending_scb = ahc_lookup_scb(ahc, active_scb_index); 2227 pending_scb->flags |= SCB_RECOVERY_SCB|flag; 2228 ahc_outb(ahc, MSG_OUT, HOST_MSG); 2229 ahc_outb(ahc, SCSISIGO, last_phase|ATNO); 2230 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2231 wait = TRUE; 2232 } else if (disconnected) { 2233 2234 /* 2235 * Actually re-queue this SCB in an attempt 2236 * to select the device before it reconnects. 2237 * In either case (selection or reselection), 2238 * we will now issue the approprate message 2239 * to the timed-out device. 2240 * 2241 * Set the MK_MESSAGE control bit indicating 2242 * that we desire to send a message. We 2243 * also set the disconnected flag since 2244 * in the paging case there is no guarantee 2245 * that our SCB control byte matches the 2246 * version on the card. We don't want the 2247 * sequencer to abort the command thinking 2248 * an unsolicited reselection occurred. 2249 */ 2250 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2251 pending_scb->flags |= SCB_RECOVERY_SCB|flag; 2252 2253 /* 2254 * Remove any cached copy of this SCB in the 2255 * disconnected list in preparation for the 2256 * queuing of our abort SCB. We use the 2257 * same element in the SCB, SCB_NEXT, for 2258 * both the qinfifo and the disconnected list. 2259 */ 2260 ahc_search_disc_list(ahc, cmd->device->id, 2261 cmd->device->channel + 'A', 2262 cmd->device->lun, pending_scb->hscb->tag, 2263 /*stop_on_first*/TRUE, 2264 /*remove*/TRUE, 2265 /*save_state*/FALSE); 2266 2267 /* 2268 * In the non-paging case, the sequencer will 2269 * never re-reference the in-core SCB. 2270 * To make sure we are notified during 2271 * reselection, set the MK_MESSAGE flag in 2272 * the card's copy of the SCB. 2273 */ 2274 if ((ahc->flags & AHC_PAGESCBS) == 0) { 2275 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag); 2276 ahc_outb(ahc, SCB_CONTROL, 2277 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE); 2278 } 2279 2280 /* 2281 * Clear out any entries in the QINFIFO first 2282 * so we are the next SCB for this target 2283 * to run. 2284 */ 2285 ahc_search_qinfifo(ahc, cmd->device->id, 2286 cmd->device->channel + 'A', 2287 cmd->device->lun, SCB_LIST_NULL, 2288 ROLE_INITIATOR, CAM_REQUEUE_REQ, 2289 SEARCH_COMPLETE); 2290 ahc_qinfifo_requeue_tail(ahc, pending_scb); 2291 ahc_outb(ahc, SCBPTR, saved_scbptr); 2292 ahc_print_path(ahc, pending_scb); 2293 printk("Device is disconnected, re-queuing SCB\n"); 2294 wait = TRUE; 2295 } else { 2296 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2297 retval = FAILED; 2298 goto done; 2299 } 2300 2301 no_cmd: 2302 /* 2303 * Our assumption is that if we don't have the command, no 2304 * recovery action was required, so we return success. Again, 2305 * the semantics of the mid-layer recovery engine are not 2306 * well defined, so this may change in time. 2307 */ 2308 retval = SUCCESS; 2309 done: 2310 if (paused) 2311 ahc_unpause(ahc); 2312 if (wait) { 2313 DECLARE_COMPLETION_ONSTACK(done); 2314 2315 ahc->platform_data->eh_done = &done; 2316 ahc_unlock(ahc, &flags); 2317 2318 printk("Recovery code sleeping\n"); 2319 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2320 ahc_lock(ahc, &flags); 2321 ahc->platform_data->eh_done = NULL; 2322 ahc_unlock(ahc, &flags); 2323 2324 printk("Timer Expired\n"); 2325 retval = FAILED; 2326 } 2327 printk("Recovery code awake\n"); 2328 } else 2329 ahc_unlock(ahc, &flags); 2330 return (retval); 2331 } 2332 2333 void 2334 ahc_platform_dump_card_state(struct ahc_softc *ahc) 2335 { 2336 } 2337 2338 static void ahc_linux_set_width(struct scsi_target *starget, int width) 2339 { 2340 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2341 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2342 struct ahc_devinfo devinfo; 2343 unsigned long flags; 2344 2345 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2346 starget->channel + 'A', ROLE_INITIATOR); 2347 ahc_lock(ahc, &flags); 2348 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE); 2349 ahc_unlock(ahc, &flags); 2350 } 2351 2352 static void ahc_linux_set_period(struct scsi_target *starget, int period) 2353 { 2354 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2355 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2356 struct ahc_tmode_tstate *tstate; 2357 struct ahc_initiator_tinfo *tinfo 2358 = ahc_fetch_transinfo(ahc, 2359 starget->channel + 'A', 2360 shost->this_id, starget->id, &tstate); 2361 struct ahc_devinfo devinfo; 2362 unsigned int ppr_options = tinfo->goal.ppr_options; 2363 unsigned long flags; 2364 unsigned long offset = tinfo->goal.offset; 2365 const struct ahc_syncrate *syncrate; 2366 2367 if (offset == 0) 2368 offset = MAX_OFFSET; 2369 2370 if (period < 9) 2371 period = 9; /* 12.5ns is our minimum */ 2372 if (period == 9) { 2373 if (spi_max_width(starget)) 2374 ppr_options |= MSG_EXT_PPR_DT_REQ; 2375 else 2376 /* need wide for DT and need DT for 12.5 ns */ 2377 period = 10; 2378 } 2379 2380 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2381 starget->channel + 'A', ROLE_INITIATOR); 2382 2383 /* all PPR requests apart from QAS require wide transfers */ 2384 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2385 if (spi_width(starget) == 0) 2386 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2387 } 2388 2389 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2390 ahc_lock(ahc, &flags); 2391 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2392 ppr_options, AHC_TRANS_GOAL, FALSE); 2393 ahc_unlock(ahc, &flags); 2394 } 2395 2396 static void ahc_linux_set_offset(struct scsi_target *starget, int offset) 2397 { 2398 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2399 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2400 struct ahc_tmode_tstate *tstate; 2401 struct ahc_initiator_tinfo *tinfo 2402 = ahc_fetch_transinfo(ahc, 2403 starget->channel + 'A', 2404 shost->this_id, starget->id, &tstate); 2405 struct ahc_devinfo devinfo; 2406 unsigned int ppr_options = 0; 2407 unsigned int period = 0; 2408 unsigned long flags; 2409 const struct ahc_syncrate *syncrate = NULL; 2410 2411 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2412 starget->channel + 'A', ROLE_INITIATOR); 2413 if (offset != 0) { 2414 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2415 period = tinfo->goal.period; 2416 ppr_options = tinfo->goal.ppr_options; 2417 } 2418 ahc_lock(ahc, &flags); 2419 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2420 ppr_options, AHC_TRANS_GOAL, FALSE); 2421 ahc_unlock(ahc, &flags); 2422 } 2423 2424 static void ahc_linux_set_dt(struct scsi_target *starget, int dt) 2425 { 2426 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2427 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2428 struct ahc_tmode_tstate *tstate; 2429 struct ahc_initiator_tinfo *tinfo 2430 = ahc_fetch_transinfo(ahc, 2431 starget->channel + 'A', 2432 shost->this_id, starget->id, &tstate); 2433 struct ahc_devinfo devinfo; 2434 unsigned int ppr_options = tinfo->goal.ppr_options 2435 & ~MSG_EXT_PPR_DT_REQ; 2436 unsigned int period = tinfo->goal.period; 2437 unsigned int width = tinfo->goal.width; 2438 unsigned long flags; 2439 const struct ahc_syncrate *syncrate; 2440 2441 if (dt && spi_max_width(starget)) { 2442 ppr_options |= MSG_EXT_PPR_DT_REQ; 2443 if (!width) 2444 ahc_linux_set_width(starget, 1); 2445 } else if (period == 9) 2446 period = 10; /* if resetting DT, period must be >= 25ns */ 2447 2448 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2449 starget->channel + 'A', ROLE_INITIATOR); 2450 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT); 2451 ahc_lock(ahc, &flags); 2452 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2453 ppr_options, AHC_TRANS_GOAL, FALSE); 2454 ahc_unlock(ahc, &flags); 2455 } 2456 2457 #if 0 2458 /* FIXME: This code claims to support IU and QAS. However, the actual 2459 * sequencer code and aic7xxx_core have no support for these parameters and 2460 * will get into a bad state if they're negotiated. Do not enable this 2461 * unless you know what you're doing */ 2462 static void ahc_linux_set_qas(struct scsi_target *starget, int qas) 2463 { 2464 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2465 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2466 struct ahc_tmode_tstate *tstate; 2467 struct ahc_initiator_tinfo *tinfo 2468 = ahc_fetch_transinfo(ahc, 2469 starget->channel + 'A', 2470 shost->this_id, starget->id, &tstate); 2471 struct ahc_devinfo devinfo; 2472 unsigned int ppr_options = tinfo->goal.ppr_options 2473 & ~MSG_EXT_PPR_QAS_REQ; 2474 unsigned int period = tinfo->goal.period; 2475 unsigned long flags; 2476 struct ahc_syncrate *syncrate; 2477 2478 if (qas) 2479 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2480 2481 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2482 starget->channel + 'A', ROLE_INITIATOR); 2483 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2484 ahc_lock(ahc, &flags); 2485 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2486 ppr_options, AHC_TRANS_GOAL, FALSE); 2487 ahc_unlock(ahc, &flags); 2488 } 2489 2490 static void ahc_linux_set_iu(struct scsi_target *starget, int iu) 2491 { 2492 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2493 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2494 struct ahc_tmode_tstate *tstate; 2495 struct ahc_initiator_tinfo *tinfo 2496 = ahc_fetch_transinfo(ahc, 2497 starget->channel + 'A', 2498 shost->this_id, starget->id, &tstate); 2499 struct ahc_devinfo devinfo; 2500 unsigned int ppr_options = tinfo->goal.ppr_options 2501 & ~MSG_EXT_PPR_IU_REQ; 2502 unsigned int period = tinfo->goal.period; 2503 unsigned long flags; 2504 struct ahc_syncrate *syncrate; 2505 2506 if (iu) 2507 ppr_options |= MSG_EXT_PPR_IU_REQ; 2508 2509 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2510 starget->channel + 'A', ROLE_INITIATOR); 2511 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2512 ahc_lock(ahc, &flags); 2513 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2514 ppr_options, AHC_TRANS_GOAL, FALSE); 2515 ahc_unlock(ahc, &flags); 2516 } 2517 #endif 2518 2519 static void ahc_linux_get_signalling(struct Scsi_Host *shost) 2520 { 2521 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata; 2522 unsigned long flags; 2523 u8 mode; 2524 2525 if (!(ahc->features & AHC_ULTRA2)) { 2526 /* non-LVD chipset, may not have SBLKCTL reg */ 2527 spi_signalling(shost) = 2528 ahc->features & AHC_HVD ? 2529 SPI_SIGNAL_HVD : 2530 SPI_SIGNAL_SE; 2531 return; 2532 } 2533 2534 ahc_lock(ahc, &flags); 2535 ahc_pause(ahc); 2536 mode = ahc_inb(ahc, SBLKCTL); 2537 ahc_unpause(ahc); 2538 ahc_unlock(ahc, &flags); 2539 2540 if (mode & ENAB40) 2541 spi_signalling(shost) = SPI_SIGNAL_LVD; 2542 else if (mode & ENAB20) 2543 spi_signalling(shost) = SPI_SIGNAL_SE; 2544 else 2545 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2546 } 2547 2548 static struct spi_function_template ahc_linux_transport_functions = { 2549 .set_offset = ahc_linux_set_offset, 2550 .show_offset = 1, 2551 .set_period = ahc_linux_set_period, 2552 .show_period = 1, 2553 .set_width = ahc_linux_set_width, 2554 .show_width = 1, 2555 .set_dt = ahc_linux_set_dt, 2556 .show_dt = 1, 2557 #if 0 2558 .set_iu = ahc_linux_set_iu, 2559 .show_iu = 1, 2560 .set_qas = ahc_linux_set_qas, 2561 .show_qas = 1, 2562 #endif 2563 .get_signalling = ahc_linux_get_signalling, 2564 }; 2565 2566 2567 2568 static int __init 2569 ahc_linux_init(void) 2570 { 2571 /* 2572 * If we've been passed any parameters, process them now. 2573 */ 2574 if (aic7xxx) 2575 aic7xxx_setup(aic7xxx); 2576 2577 ahc_linux_transport_template = 2578 spi_attach_transport(&ahc_linux_transport_functions); 2579 if (!ahc_linux_transport_template) 2580 return -ENODEV; 2581 2582 scsi_transport_reserve_device(ahc_linux_transport_template, 2583 sizeof(struct ahc_linux_device)); 2584 2585 ahc_linux_pci_init(); 2586 ahc_linux_eisa_init(); 2587 return 0; 2588 } 2589 2590 static void 2591 ahc_linux_exit(void) 2592 { 2593 ahc_linux_pci_exit(); 2594 ahc_linux_eisa_exit(); 2595 spi_release_transport(ahc_linux_transport_template); 2596 } 2597 2598 module_init(ahc_linux_init); 2599 module_exit(ahc_linux_exit); 2600