1 2 /* 3 * Adaptec AIC7xxx device driver for Linux. 4 * 5 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $ 6 * 7 * Copyright (c) 1994 John Aycock 8 * The University of Calgary Department of Computer Science. 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2, or (at your option) 13 * any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; see the file COPYING. If not, write to 22 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 23 * 24 * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F 25 * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA 26 * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide, 27 * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux, 28 * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file 29 * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual, 30 * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the 31 * ANSI SCSI-2 specification (draft 10c), ... 32 * 33 * -------------------------------------------------------------------------- 34 * 35 * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org): 36 * 37 * Substantially modified to include support for wide and twin bus 38 * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes, 39 * SCB paging, and other rework of the code. 40 * 41 * -------------------------------------------------------------------------- 42 * Copyright (c) 1994-2000 Justin T. Gibbs. 43 * Copyright (c) 2000-2001 Adaptec Inc. 44 * All rights reserved. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions, and the following disclaimer, 51 * without modification. 52 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 53 * substantially similar to the "NO WARRANTY" disclaimer below 54 * ("Disclaimer") and any redistribution must be conditioned upon 55 * including a substantially similar Disclaimer requirement for further 56 * binary redistribution. 57 * 3. Neither the names of the above-listed copyright holders nor the names 58 * of any contributors may be used to endorse or promote products derived 59 * from this software without specific prior written permission. 60 * 61 * Alternatively, this software may be distributed under the terms of the 62 * GNU General Public License ("GPL") version 2 as published by the Free 63 * Software Foundation. 64 * 65 * NO WARRANTY 66 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 67 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 68 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 69 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 70 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 71 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 72 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 73 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 74 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 75 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 76 * POSSIBILITY OF SUCH DAMAGES. 77 * 78 *--------------------------------------------------------------------------- 79 * 80 * Thanks also go to (in alphabetical order) the following: 81 * 82 * Rory Bolt - Sequencer bug fixes 83 * Jay Estabrook - Initial DEC Alpha support 84 * Doug Ledford - Much needed abort/reset bug fixes 85 * Kai Makisara - DMAing of SCBs 86 * 87 * A Boot time option was also added for not resetting the scsi bus. 88 * 89 * Form: aic7xxx=extended 90 * aic7xxx=no_reset 91 * aic7xxx=verbose 92 * 93 * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97 94 * 95 * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp 96 */ 97 98 /* 99 * Further driver modifications made by Doug Ledford <dledford@redhat.com> 100 * 101 * Copyright (c) 1997-1999 Doug Ledford 102 * 103 * These changes are released under the same licensing terms as the FreeBSD 104 * driver written by Justin Gibbs. Please see his Copyright notice above 105 * for the exact terms and conditions covering my changes as well as the 106 * warranty statement. 107 * 108 * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include 109 * but are not limited to: 110 * 111 * 1: Import of the latest FreeBSD sequencer code for this driver 112 * 2: Modification of kernel code to accommodate different sequencer semantics 113 * 3: Extensive changes throughout kernel portion of driver to improve 114 * abort/reset processing and error hanndling 115 * 4: Other work contributed by various people on the Internet 116 * 5: Changes to printk information and verbosity selection code 117 * 6: General reliability related changes, especially in IRQ management 118 * 7: Modifications to the default probe/attach order for supported cards 119 * 8: SMP friendliness has been improved 120 * 121 */ 122 123 #include "aic7xxx_osm.h" 124 #include "aic7xxx_inline.h" 125 #include <scsi/scsicam.h> 126 127 static struct scsi_transport_template *ahc_linux_transport_template = NULL; 128 129 #include <linux/init.h> /* __setup */ 130 #include <linux/mm.h> /* For fetching system memory size */ 131 #include <linux/blkdev.h> /* For block_size() */ 132 #include <linux/delay.h> /* For ssleep/msleep */ 133 #include <linux/slab.h> 134 135 136 /* 137 * Set this to the delay in seconds after SCSI bus reset. 138 * Note, we honor this only for the initial bus reset. 139 * The scsi error recovery code performs its own bus settle 140 * delay handling for error recovery actions. 141 */ 142 #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS 143 #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS 144 #else 145 #define AIC7XXX_RESET_DELAY 5000 146 #endif 147 148 /* 149 * To change the default number of tagged transactions allowed per-device, 150 * add a line to the lilo.conf file like: 151 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" 152 * which will result in the first four devices on the first two 153 * controllers being set to a tagged queue depth of 32. 154 * 155 * The tag_commands is an array of 16 to allow for wide and twin adapters. 156 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 157 * for channel 1. 158 */ 159 typedef struct { 160 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */ 161 } adapter_tag_info_t; 162 163 /* 164 * Modify this as you see fit for your system. 165 * 166 * 0 tagged queuing disabled 167 * 1 <= n <= 253 n == max tags ever dispatched. 168 * 169 * The driver will throttle the number of commands dispatched to a 170 * device if it returns queue full. For devices with a fixed maximum 171 * queue depth, the driver will eventually determine this depth and 172 * lock it in (a console message is printed to indicate that a lock 173 * has occurred). On some devices, queue full is returned for a temporary 174 * resource shortage. These devices will return queue full at varying 175 * depths. The driver will throttle back when the queue fulls occur and 176 * attempt to slowly increase the depth over time as the device recovers 177 * from the resource shortage. 178 * 179 * In this example, the first line will disable tagged queueing for all 180 * the devices on the first probed aic7xxx adapter. 181 * 182 * The second line enables tagged queueing with 4 commands/LUN for IDs 183 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the 184 * driver to attempt to use up to 64 tags for ID 1. 185 * 186 * The third line is the same as the first line. 187 * 188 * The fourth line disables tagged queueing for devices 0 and 3. It 189 * enables tagged queueing for the other IDs, with 16 commands/LUN 190 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for 191 * IDs 2, 5-7, and 9-15. 192 */ 193 194 /* 195 * NOTE: The below structure is for reference only, the actual structure 196 * to modify in order to change things is just below this comment block. 197 adapter_tag_info_t aic7xxx_tag_info[] = 198 { 199 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 200 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, 201 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 202 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} 203 }; 204 */ 205 206 #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE 207 #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE 208 #else 209 #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE 210 #endif 211 212 #define AIC7XXX_CONFIGED_TAG_COMMANDS { \ 213 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 214 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 215 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 216 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 217 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 218 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 219 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 220 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \ 221 } 222 223 /* 224 * By default, use the number of commands specified by 225 * the users kernel configuration. 226 */ 227 static adapter_tag_info_t aic7xxx_tag_info[] = 228 { 229 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 230 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 231 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 232 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 233 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 234 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 235 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 236 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 237 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 238 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 239 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 240 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 241 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 242 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 243 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 244 {AIC7XXX_CONFIGED_TAG_COMMANDS} 245 }; 246 247 /* 248 * There should be a specific return value for this in scsi.h, but 249 * it seems that most drivers ignore it. 250 */ 251 #define DID_UNDERFLOW DID_ERROR 252 253 void 254 ahc_print_path(struct ahc_softc *ahc, struct scb *scb) 255 { 256 printk("(scsi%d:%c:%d:%d): ", 257 ahc->platform_data->host->host_no, 258 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X', 259 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1, 260 scb != NULL ? SCB_GET_LUN(scb) : -1); 261 } 262 263 /* 264 * XXX - these options apply unilaterally to _all_ 274x/284x/294x 265 * cards in the system. This should be fixed. Exceptions to this 266 * rule are noted in the comments. 267 */ 268 269 /* 270 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This 271 * has no effect on any later resets that might occur due to things like 272 * SCSI bus timeouts. 273 */ 274 static uint32_t aic7xxx_no_reset; 275 276 /* 277 * Should we force EXTENDED translation on a controller. 278 * 0 == Use whatever is in the SEEPROM or default to off 279 * 1 == Use whatever is in the SEEPROM or default to on 280 */ 281 static uint32_t aic7xxx_extended; 282 283 /* 284 * PCI bus parity checking of the Adaptec controllers. This is somewhat 285 * dubious at best. To my knowledge, this option has never actually 286 * solved a PCI parity problem, but on certain machines with broken PCI 287 * chipset configurations where stray PCI transactions with bad parity are 288 * the norm rather than the exception, the error messages can be overwhelming. 289 * It's included in the driver for completeness. 290 * 0 = Shut off PCI parity check 291 * non-0 = reverse polarity pci parity checking 292 */ 293 static uint32_t aic7xxx_pci_parity = ~0; 294 295 /* 296 * There are lots of broken chipsets in the world. Some of them will 297 * violate the PCI spec when we issue byte sized memory writes to our 298 * controller. I/O mapped register access, if allowed by the given 299 * platform, will work in almost all cases. 300 */ 301 uint32_t aic7xxx_allow_memio = ~0; 302 303 /* 304 * So that we can set how long each device is given as a selection timeout. 305 * The table of values goes like this: 306 * 0 - 256ms 307 * 1 - 128ms 308 * 2 - 64ms 309 * 3 - 32ms 310 * We default to 256ms because some older devices need a longer time 311 * to respond to initial selection. 312 */ 313 static uint32_t aic7xxx_seltime; 314 315 /* 316 * Certain devices do not perform any aging on commands. Should the 317 * device be saturated by commands in one portion of the disk, it is 318 * possible for transactions on far away sectors to never be serviced. 319 * To handle these devices, we can periodically send an ordered tag to 320 * force all outstanding transactions to be serviced prior to a new 321 * transaction. 322 */ 323 static uint32_t aic7xxx_periodic_otag; 324 325 /* 326 * Module information and settable options. 327 */ 328 static char *aic7xxx = NULL; 329 330 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>"); 331 MODULE_DESCRIPTION("Adaptec AIC77XX/78XX SCSI Host Bus Adapter driver"); 332 MODULE_LICENSE("Dual BSD/GPL"); 333 MODULE_VERSION(AIC7XXX_DRIVER_VERSION); 334 module_param(aic7xxx, charp, 0444); 335 MODULE_PARM_DESC(aic7xxx, 336 "period-delimited options string:\n" 337 " verbose Enable verbose/diagnostic logging\n" 338 " allow_memio Allow device registers to be memory mapped\n" 339 " debug Bitmask of debug values to enable\n" 340 " no_probe Toggle EISA/VLB controller probing\n" 341 " probe_eisa_vl Toggle EISA/VLB controller probing\n" 342 " no_reset Suppress initial bus resets\n" 343 " extended Enable extended geometry on all controllers\n" 344 " periodic_otag Send an ordered tagged transaction\n" 345 " periodically to prevent tag starvation.\n" 346 " This may be required by some older disk\n" 347 " drives or RAID arrays.\n" 348 " tag_info:<tag_str> Set per-target tag depth\n" 349 " global_tag_depth:<int> Global tag depth for every target\n" 350 " on every bus\n" 351 " seltime:<int> Selection Timeout\n" 352 " (0/256ms,1/128ms,2/64ms,3/32ms)\n" 353 "\n" 354 " Sample modprobe configuration file:\n" 355 " # Toggle EISA/VLB probing\n" 356 " # Set tag depth on Controller 1/Target 1 to 10 tags\n" 357 " # Shorten the selection timeout to 128ms\n" 358 "\n" 359 " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n" 360 ); 361 362 static void ahc_linux_handle_scsi_status(struct ahc_softc *, 363 struct scsi_device *, 364 struct scb *); 365 static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, 366 struct scsi_cmnd *cmd); 367 static void ahc_linux_freeze_simq(struct ahc_softc *ahc); 368 static void ahc_linux_release_simq(struct ahc_softc *ahc); 369 static int ahc_linux_queue_recovery_cmd(struct scsi_device *sdev, 370 struct scsi_cmnd *cmd); 371 static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc); 372 static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc, 373 struct ahc_devinfo *devinfo); 374 static void ahc_linux_device_queue_depth(struct scsi_device *); 375 static int ahc_linux_run_command(struct ahc_softc*, 376 struct ahc_linux_device *, 377 struct scsi_cmnd *); 378 static void ahc_linux_setup_tag_info_global(char *p); 379 static int aic7xxx_setup(char *s); 380 381 static int ahc_linux_unit; 382 383 384 /************************** OS Utility Wrappers *******************************/ 385 void 386 ahc_delay(long usec) 387 { 388 /* 389 * udelay on Linux can have problems for 390 * multi-millisecond waits. Wait at most 391 * 1024us per call. 392 */ 393 while (usec > 0) { 394 udelay(usec % 1024); 395 usec -= 1024; 396 } 397 } 398 399 /***************************** Low Level I/O **********************************/ 400 uint8_t 401 ahc_inb(struct ahc_softc * ahc, long port) 402 { 403 uint8_t x; 404 405 if (ahc->tag == BUS_SPACE_MEMIO) { 406 x = readb(ahc->bsh.maddr + port); 407 } else { 408 x = inb(ahc->bsh.ioport + port); 409 } 410 mb(); 411 return (x); 412 } 413 414 void 415 ahc_outb(struct ahc_softc * ahc, long port, uint8_t val) 416 { 417 if (ahc->tag == BUS_SPACE_MEMIO) { 418 writeb(val, ahc->bsh.maddr + port); 419 } else { 420 outb(val, ahc->bsh.ioport + port); 421 } 422 mb(); 423 } 424 425 void 426 ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count) 427 { 428 int i; 429 430 /* 431 * There is probably a more efficient way to do this on Linux 432 * but we don't use this for anything speed critical and this 433 * should work. 434 */ 435 for (i = 0; i < count; i++) 436 ahc_outb(ahc, port, *array++); 437 } 438 439 void 440 ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count) 441 { 442 int i; 443 444 /* 445 * There is probably a more efficient way to do this on Linux 446 * but we don't use this for anything speed critical and this 447 * should work. 448 */ 449 for (i = 0; i < count; i++) 450 *array++ = ahc_inb(ahc, port); 451 } 452 453 /********************************* Inlines ************************************/ 454 static void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*); 455 456 static int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, 457 struct ahc_dma_seg *sg, 458 dma_addr_t addr, bus_size_t len); 459 460 static void 461 ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb) 462 { 463 struct scsi_cmnd *cmd; 464 465 cmd = scb->io_ctx; 466 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE); 467 468 scsi_dma_unmap(cmd); 469 } 470 471 static int 472 ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, 473 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len) 474 { 475 int consumed; 476 477 if ((scb->sg_count + 1) > AHC_NSEG) 478 panic("Too few segs for dma mapping. " 479 "Increase AHC_NSEG\n"); 480 481 consumed = 1; 482 sg->addr = ahc_htole32(addr & 0xFFFFFFFF); 483 scb->platform_data->xfer_len += len; 484 485 if (sizeof(dma_addr_t) > 4 486 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0) 487 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK; 488 489 sg->len = ahc_htole32(len); 490 return (consumed); 491 } 492 493 /* 494 * Return a string describing the driver. 495 */ 496 static const char * 497 ahc_linux_info(struct Scsi_Host *host) 498 { 499 static char buffer[512]; 500 char ahc_info[256]; 501 char *bp; 502 struct ahc_softc *ahc; 503 504 bp = &buffer[0]; 505 ahc = *(struct ahc_softc **)host->hostdata; 506 memset(bp, 0, sizeof(buffer)); 507 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev " AIC7XXX_DRIVER_VERSION "\n" 508 " <"); 509 strcat(bp, ahc->description); 510 strcat(bp, ">\n" 511 " "); 512 ahc_controller_info(ahc, ahc_info); 513 strcat(bp, ahc_info); 514 strcat(bp, "\n"); 515 516 return (bp); 517 } 518 519 /* 520 * Queue an SCB to the controller. 521 */ 522 static int ahc_linux_queue_lck(struct scsi_cmnd *cmd) 523 { 524 struct ahc_softc *ahc; 525 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device); 526 int rtn = SCSI_MLQUEUE_HOST_BUSY; 527 unsigned long flags; 528 529 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 530 531 ahc_lock(ahc, &flags); 532 if (ahc->platform_data->qfrozen == 0) { 533 cmd->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->device, cmd); 733 if (error != SUCCESS) 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->device, NULL); 747 if (error != SUCCESS) 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 *********************************/ 801 802 803 static inline unsigned int ahc_build_scsiid(struct ahc_softc *ahc, 804 struct scsi_device *sdev) 805 { 806 unsigned int scsiid = (sdev->id << TID_SHIFT) & TID; 807 808 if (sdev->channel == 0) 809 scsiid |= ahc->our_id; 810 else 811 scsiid |= ahc->our_id_b | TWIN_CHNLB; 812 return scsiid; 813 } 814 815 /******************************** Bus DMA *************************************/ 816 int 817 ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent, 818 bus_size_t alignment, bus_size_t boundary, 819 dma_addr_t lowaddr, dma_addr_t highaddr, 820 bus_dma_filter_t *filter, void *filterarg, 821 bus_size_t maxsize, int nsegments, 822 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 823 { 824 bus_dma_tag_t dmat; 825 826 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC); 827 if (dmat == NULL) 828 return (ENOMEM); 829 830 /* 831 * Linux is very simplistic about DMA memory. For now don't 832 * maintain all specification information. Once Linux supplies 833 * better facilities for doing these operations, or the 834 * needs of this particular driver change, we might need to do 835 * more here. 836 */ 837 dmat->alignment = alignment; 838 dmat->boundary = boundary; 839 dmat->maxsize = maxsize; 840 *ret_tag = dmat; 841 return (0); 842 } 843 844 void 845 ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat) 846 { 847 kfree(dmat); 848 } 849 850 int 851 ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr, 852 int flags, bus_dmamap_t *mapp) 853 { 854 /* XXX: check if we really need the GFP_ATOMIC and unwind this mess! */ 855 *vaddr = dma_alloc_coherent(ahc->dev, dmat->maxsize, mapp, GFP_ATOMIC); 856 if (*vaddr == NULL) 857 return ENOMEM; 858 return 0; 859 } 860 861 void 862 ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat, 863 void* vaddr, bus_dmamap_t map) 864 { 865 dma_free_coherent(ahc->dev, dmat->maxsize, vaddr, map); 866 } 867 868 int 869 ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map, 870 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 871 void *cb_arg, int flags) 872 { 873 /* 874 * Assume for now that this will only be used during 875 * initialization and not for per-transaction buffer mapping. 876 */ 877 bus_dma_segment_t stack_sg; 878 879 stack_sg.ds_addr = map; 880 stack_sg.ds_len = dmat->maxsize; 881 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 882 return (0); 883 } 884 885 void 886 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 887 { 888 } 889 890 int 891 ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 892 { 893 /* Nothing to do */ 894 return (0); 895 } 896 897 static void 898 ahc_linux_setup_tag_info_global(char *p) 899 { 900 int tags, i, j; 901 902 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 903 printk("Setting Global Tags= %d\n", tags); 904 905 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) { 906 for (j = 0; j < AHC_NUM_TARGETS; j++) { 907 aic7xxx_tag_info[i].tag_commands[j] = tags; 908 } 909 } 910 } 911 912 static void 913 ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 914 { 915 916 if ((instance >= 0) && (targ >= 0) 917 && (instance < ARRAY_SIZE(aic7xxx_tag_info)) 918 && (targ < AHC_NUM_TARGETS)) { 919 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff; 920 if (bootverbose) 921 printk("tag_info[%d:%d] = %d\n", instance, targ, value); 922 } 923 } 924 925 static char * 926 ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 927 void (*callback)(u_long, int, int, int32_t), 928 u_long callback_arg) 929 { 930 char *tok_end; 931 char *tok_end2; 932 int i; 933 int instance; 934 int targ; 935 int done; 936 char tok_list[] = {'.', ',', '{', '}', '\0'}; 937 938 /* All options use a ':' name/arg separator */ 939 if (*opt_arg != ':') 940 return (opt_arg); 941 opt_arg++; 942 instance = -1; 943 targ = -1; 944 done = FALSE; 945 /* 946 * Restore separator that may be in 947 * the middle of our option argument. 948 */ 949 tok_end = strchr(opt_arg, '\0'); 950 if (tok_end < end) 951 *tok_end = ','; 952 while (!done) { 953 switch (*opt_arg) { 954 case '{': 955 if (instance == -1) { 956 instance = 0; 957 } else { 958 if (depth > 1) { 959 if (targ == -1) 960 targ = 0; 961 } else { 962 printk("Malformed Option %s\n", 963 opt_name); 964 done = TRUE; 965 } 966 } 967 opt_arg++; 968 break; 969 case '}': 970 if (targ != -1) 971 targ = -1; 972 else if (instance != -1) 973 instance = -1; 974 opt_arg++; 975 break; 976 case ',': 977 case '.': 978 if (instance == -1) 979 done = TRUE; 980 else if (targ >= 0) 981 targ++; 982 else if (instance >= 0) 983 instance++; 984 opt_arg++; 985 break; 986 case '\0': 987 done = TRUE; 988 break; 989 default: 990 tok_end = end; 991 for (i = 0; tok_list[i]; i++) { 992 tok_end2 = strchr(opt_arg, tok_list[i]); 993 if ((tok_end2) && (tok_end2 < tok_end)) 994 tok_end = tok_end2; 995 } 996 callback(callback_arg, instance, targ, 997 simple_strtol(opt_arg, NULL, 0)); 998 opt_arg = tok_end; 999 break; 1000 } 1001 } 1002 return (opt_arg); 1003 } 1004 1005 /* 1006 * Handle Linux boot parameters. This routine allows for assigning a value 1007 * to a parameter with a ':' between the parameter and the value. 1008 * ie. aic7xxx=stpwlev:1,extended 1009 */ 1010 static int 1011 aic7xxx_setup(char *s) 1012 { 1013 int i, n; 1014 char *p; 1015 char *end; 1016 1017 static const struct { 1018 const char *name; 1019 uint32_t *flag; 1020 } options[] = { 1021 { "extended", &aic7xxx_extended }, 1022 { "no_reset", &aic7xxx_no_reset }, 1023 { "verbose", &aic7xxx_verbose }, 1024 { "allow_memio", &aic7xxx_allow_memio}, 1025 #ifdef AHC_DEBUG 1026 { "debug", &ahc_debug }, 1027 #endif 1028 { "periodic_otag", &aic7xxx_periodic_otag }, 1029 { "pci_parity", &aic7xxx_pci_parity }, 1030 { "seltime", &aic7xxx_seltime }, 1031 { "tag_info", NULL }, 1032 { "global_tag_depth", NULL }, 1033 { "dv", NULL } 1034 }; 1035 1036 end = strchr(s, '\0'); 1037 1038 /* 1039 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE 1040 * will never be 0 in this case. 1041 */ 1042 n = 0; 1043 1044 while ((p = strsep(&s, ",.")) != NULL) { 1045 if (*p == '\0') 1046 continue; 1047 for (i = 0; i < ARRAY_SIZE(options); i++) { 1048 1049 n = strlen(options[i].name); 1050 if (strncmp(options[i].name, p, n) == 0) 1051 break; 1052 } 1053 if (i == ARRAY_SIZE(options)) 1054 continue; 1055 1056 if (strncmp(p, "global_tag_depth", n) == 0) { 1057 ahc_linux_setup_tag_info_global(p + n); 1058 } else if (strncmp(p, "tag_info", n) == 0) { 1059 s = ahc_parse_brace_option("tag_info", p + n, end, 1060 2, ahc_linux_setup_tag_info, 0); 1061 } else if (p[n] == ':') { 1062 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1063 } else if (strncmp(p, "verbose", n) == 0) { 1064 *(options[i].flag) = 1; 1065 } else { 1066 *(options[i].flag) ^= 0xFFFFFFFF; 1067 } 1068 } 1069 return 1; 1070 } 1071 1072 __setup("aic7xxx=", aic7xxx_setup); 1073 1074 uint32_t aic7xxx_verbose; 1075 1076 int 1077 ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template) 1078 { 1079 char buf[80]; 1080 struct Scsi_Host *host; 1081 char *new_name; 1082 u_long s; 1083 int retval; 1084 1085 template->name = ahc->description; 1086 host = scsi_host_alloc(template, sizeof(struct ahc_softc *)); 1087 if (host == NULL) 1088 return (ENOMEM); 1089 1090 *((struct ahc_softc **)host->hostdata) = ahc; 1091 ahc->platform_data->host = host; 1092 host->can_queue = AHC_MAX_QUEUE; 1093 host->cmd_per_lun = 2; 1094 /* XXX No way to communicate the ID for multiple channels */ 1095 host->this_id = ahc->our_id; 1096 host->irq = ahc->platform_data->irq; 1097 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8; 1098 host->max_lun = AHC_NUM_LUNS; 1099 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0; 1100 host->sg_tablesize = AHC_NSEG; 1101 ahc_lock(ahc, &s); 1102 ahc_set_unit(ahc, ahc_linux_unit++); 1103 ahc_unlock(ahc, &s); 1104 sprintf(buf, "scsi%d", host->host_no); 1105 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC); 1106 if (new_name != NULL) { 1107 strcpy(new_name, buf); 1108 ahc_set_name(ahc, new_name); 1109 } 1110 host->unique_id = ahc->unit; 1111 ahc_linux_initialize_scsi_bus(ahc); 1112 ahc_intr_enable(ahc, TRUE); 1113 1114 host->transportt = ahc_linux_transport_template; 1115 1116 retval = scsi_add_host(host, ahc->dev); 1117 if (retval) { 1118 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n"); 1119 scsi_host_put(host); 1120 return retval; 1121 } 1122 1123 scsi_scan_host(host); 1124 return 0; 1125 } 1126 1127 /* 1128 * Place the SCSI bus into a known state by either resetting it, 1129 * or forcing transfer negotiations on the next command to any 1130 * target. 1131 */ 1132 static void 1133 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc) 1134 { 1135 int i; 1136 int numtarg; 1137 unsigned long s; 1138 1139 i = 0; 1140 numtarg = 0; 1141 1142 ahc_lock(ahc, &s); 1143 1144 if (aic7xxx_no_reset != 0) 1145 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B); 1146 1147 if ((ahc->flags & AHC_RESET_BUS_A) != 0) 1148 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE); 1149 else 1150 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8; 1151 1152 if ((ahc->features & AHC_TWIN) != 0) { 1153 1154 if ((ahc->flags & AHC_RESET_BUS_B) != 0) { 1155 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE); 1156 } else { 1157 if (numtarg == 0) 1158 i = 8; 1159 numtarg += 8; 1160 } 1161 } 1162 1163 /* 1164 * Force negotiation to async for all targets that 1165 * will not see an initial bus reset. 1166 */ 1167 for (; i < numtarg; i++) { 1168 struct ahc_devinfo devinfo; 1169 struct ahc_initiator_tinfo *tinfo; 1170 struct ahc_tmode_tstate *tstate; 1171 u_int our_id; 1172 u_int target_id; 1173 char channel; 1174 1175 channel = 'A'; 1176 our_id = ahc->our_id; 1177 target_id = i; 1178 if (i > 7 && (ahc->features & AHC_TWIN) != 0) { 1179 channel = 'B'; 1180 our_id = ahc->our_id_b; 1181 target_id = i % 8; 1182 } 1183 tinfo = ahc_fetch_transinfo(ahc, channel, our_id, 1184 target_id, &tstate); 1185 ahc_compile_devinfo(&devinfo, our_id, target_id, 1186 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR); 1187 ahc_update_neg_request(ahc, &devinfo, tstate, 1188 tinfo, AHC_NEG_ALWAYS); 1189 } 1190 ahc_unlock(ahc, &s); 1191 /* Give the bus some time to recover */ 1192 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) { 1193 ahc_linux_freeze_simq(ahc); 1194 msleep(AIC7XXX_RESET_DELAY); 1195 ahc_linux_release_simq(ahc); 1196 } 1197 } 1198 1199 int 1200 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg) 1201 { 1202 1203 ahc->platform_data = 1204 kzalloc(sizeof(struct ahc_platform_data), GFP_ATOMIC); 1205 if (ahc->platform_data == NULL) 1206 return (ENOMEM); 1207 ahc->platform_data->irq = AHC_LINUX_NOIRQ; 1208 ahc_lockinit(ahc); 1209 ahc->seltime = (aic7xxx_seltime & 0x3) << 4; 1210 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4; 1211 if (aic7xxx_pci_parity == 0) 1212 ahc->flags |= AHC_DISABLE_PCI_PERR; 1213 1214 return (0); 1215 } 1216 1217 void 1218 ahc_platform_free(struct ahc_softc *ahc) 1219 { 1220 struct scsi_target *starget; 1221 int i; 1222 1223 if (ahc->platform_data != NULL) { 1224 /* destroy all of the device and target objects */ 1225 for (i = 0; i < AHC_NUM_TARGETS; i++) { 1226 starget = ahc->platform_data->starget[i]; 1227 if (starget != NULL) { 1228 ahc->platform_data->starget[i] = NULL; 1229 } 1230 } 1231 1232 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ) 1233 free_irq(ahc->platform_data->irq, ahc); 1234 if (ahc->tag == BUS_SPACE_PIO 1235 && ahc->bsh.ioport != 0) 1236 release_region(ahc->bsh.ioport, 256); 1237 if (ahc->tag == BUS_SPACE_MEMIO 1238 && ahc->bsh.maddr != NULL) { 1239 iounmap(ahc->bsh.maddr); 1240 release_mem_region(ahc->platform_data->mem_busaddr, 1241 0x1000); 1242 } 1243 1244 if (ahc->platform_data->host) 1245 scsi_host_put(ahc->platform_data->host); 1246 1247 kfree(ahc->platform_data); 1248 } 1249 } 1250 1251 void 1252 ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb) 1253 { 1254 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb), 1255 SCB_GET_CHANNEL(ahc, scb), 1256 SCB_GET_LUN(scb), SCB_LIST_NULL, 1257 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1258 } 1259 1260 void 1261 ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev, 1262 struct ahc_devinfo *devinfo, ahc_queue_alg alg) 1263 { 1264 struct ahc_linux_device *dev; 1265 int was_queuing; 1266 int now_queuing; 1267 1268 if (sdev == NULL) 1269 return; 1270 dev = scsi_transport_device_data(sdev); 1271 1272 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED); 1273 switch (alg) { 1274 default: 1275 case AHC_QUEUE_NONE: 1276 now_queuing = 0; 1277 break; 1278 case AHC_QUEUE_BASIC: 1279 now_queuing = AHC_DEV_Q_BASIC; 1280 break; 1281 case AHC_QUEUE_TAGGED: 1282 now_queuing = AHC_DEV_Q_TAGGED; 1283 break; 1284 } 1285 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0 1286 && (was_queuing != now_queuing) 1287 && (dev->active != 0)) { 1288 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY; 1289 dev->qfrozen++; 1290 } 1291 1292 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG); 1293 if (now_queuing) { 1294 u_int usertags; 1295 1296 usertags = ahc_linux_user_tagdepth(ahc, devinfo); 1297 if (!was_queuing) { 1298 /* 1299 * Start out aggressively and allow our 1300 * dynamic queue depth algorithm to take 1301 * care of the rest. 1302 */ 1303 dev->maxtags = usertags; 1304 dev->openings = dev->maxtags - dev->active; 1305 } 1306 if (dev->maxtags == 0) { 1307 /* 1308 * Queueing is disabled by the user. 1309 */ 1310 dev->openings = 1; 1311 } else if (alg == AHC_QUEUE_TAGGED) { 1312 dev->flags |= AHC_DEV_Q_TAGGED; 1313 if (aic7xxx_periodic_otag != 0) 1314 dev->flags |= AHC_DEV_PERIODIC_OTAG; 1315 } else 1316 dev->flags |= AHC_DEV_Q_BASIC; 1317 } else { 1318 /* We can only have one opening. */ 1319 dev->maxtags = 0; 1320 dev->openings = 1 - dev->active; 1321 } 1322 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) { 1323 case AHC_DEV_Q_BASIC: 1324 case AHC_DEV_Q_TAGGED: 1325 scsi_change_queue_depth(sdev, 1326 dev->openings + dev->active); 1327 break; 1328 default: 1329 /* 1330 * We allow the OS to queue 2 untagged transactions to 1331 * us at any time even though we can only execute them 1332 * serially on the controller/device. This should 1333 * remove some latency. 1334 */ 1335 scsi_change_queue_depth(sdev, 2); 1336 break; 1337 } 1338 } 1339 1340 int 1341 ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel, 1342 int lun, u_int tag, role_t role, uint32_t status) 1343 { 1344 return 0; 1345 } 1346 1347 static u_int 1348 ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 1349 { 1350 static int warned_user; 1351 u_int tags; 1352 1353 tags = 0; 1354 if ((ahc->user_discenable & devinfo->target_mask) != 0) { 1355 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) { 1356 if (warned_user == 0) { 1357 1358 printk(KERN_WARNING 1359 "aic7xxx: WARNING: Insufficient tag_info instances\n" 1360 "aic7xxx: for installed controllers. Using defaults\n" 1361 "aic7xxx: Please update the aic7xxx_tag_info array in\n" 1362 "aic7xxx: the aic7xxx_osm..c source file.\n"); 1363 warned_user++; 1364 } 1365 tags = AHC_MAX_QUEUE; 1366 } else { 1367 adapter_tag_info_t *tag_info; 1368 1369 tag_info = &aic7xxx_tag_info[ahc->unit]; 1370 tags = tag_info->tag_commands[devinfo->target_offset]; 1371 if (tags > AHC_MAX_QUEUE) 1372 tags = AHC_MAX_QUEUE; 1373 } 1374 } 1375 return (tags); 1376 } 1377 1378 /* 1379 * Determines the queue depth for a given device. 1380 */ 1381 static void 1382 ahc_linux_device_queue_depth(struct scsi_device *sdev) 1383 { 1384 struct ahc_devinfo devinfo; 1385 u_int tags; 1386 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata); 1387 1388 ahc_compile_devinfo(&devinfo, 1389 sdev->sdev_target->channel == 0 1390 ? ahc->our_id : ahc->our_id_b, 1391 sdev->sdev_target->id, sdev->lun, 1392 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1393 ROLE_INITIATOR); 1394 tags = ahc_linux_user_tagdepth(ahc, &devinfo); 1395 if (tags != 0 && sdev->tagged_supported != 0) { 1396 1397 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED); 1398 ahc_send_async(ahc, devinfo.channel, devinfo.target, 1399 devinfo.lun, AC_TRANSFER_NEG); 1400 ahc_print_devinfo(ahc, &devinfo); 1401 printk("Tagged Queuing enabled. Depth %d\n", tags); 1402 } else { 1403 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE); 1404 ahc_send_async(ahc, devinfo.channel, devinfo.target, 1405 devinfo.lun, AC_TRANSFER_NEG); 1406 } 1407 } 1408 1409 static int 1410 ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev, 1411 struct scsi_cmnd *cmd) 1412 { 1413 struct scb *scb; 1414 struct hardware_scb *hscb; 1415 struct ahc_initiator_tinfo *tinfo; 1416 struct ahc_tmode_tstate *tstate; 1417 uint16_t mask; 1418 struct scb_tailq *untagged_q = NULL; 1419 int nseg; 1420 1421 /* 1422 * Schedule us to run later. The only reason we are not 1423 * running is because the whole controller Q is frozen. 1424 */ 1425 if (ahc->platform_data->qfrozen != 0) 1426 return SCSI_MLQUEUE_HOST_BUSY; 1427 1428 /* 1429 * We only allow one untagged transaction 1430 * per target in the initiator role unless 1431 * we are storing a full busy target *lun* 1432 * table in SCB space. 1433 */ 1434 if (!(cmd->flags & SCMD_TAGGED) 1435 && (ahc->features & AHC_SCB_BTT) == 0) { 1436 int target_offset; 1437 1438 target_offset = cmd->device->id + cmd->device->channel * 8; 1439 untagged_q = &(ahc->untagged_queues[target_offset]); 1440 if (!TAILQ_EMPTY(untagged_q)) 1441 /* if we're already executing an untagged command 1442 * we're busy to another */ 1443 return SCSI_MLQUEUE_DEVICE_BUSY; 1444 } 1445 1446 nseg = scsi_dma_map(cmd); 1447 if (nseg < 0) 1448 return SCSI_MLQUEUE_HOST_BUSY; 1449 1450 /* 1451 * Get an scb to use. 1452 */ 1453 scb = ahc_get_scb(ahc); 1454 if (!scb) { 1455 scsi_dma_unmap(cmd); 1456 return SCSI_MLQUEUE_HOST_BUSY; 1457 } 1458 1459 scb->io_ctx = cmd; 1460 scb->platform_data->dev = dev; 1461 hscb = scb->hscb; 1462 cmd->host_scribble = (char *)scb; 1463 1464 /* 1465 * Fill out basics of the HSCB. 1466 */ 1467 hscb->control = 0; 1468 hscb->scsiid = ahc_build_scsiid(ahc, cmd->device); 1469 hscb->lun = cmd->device->lun; 1470 mask = SCB_GET_TARGET_MASK(ahc, scb); 1471 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb), 1472 SCB_GET_OUR_ID(scb), 1473 SCB_GET_TARGET(ahc, scb), &tstate); 1474 hscb->scsirate = tinfo->scsirate; 1475 hscb->scsioffset = tinfo->curr.offset; 1476 if ((tstate->ultraenb & mask) != 0) 1477 hscb->control |= ULTRAENB; 1478 1479 if ((ahc->user_discenable & mask) != 0) 1480 hscb->control |= DISCENB; 1481 1482 if ((tstate->auto_negotiate & mask) != 0) { 1483 scb->flags |= SCB_AUTO_NEGOTIATE; 1484 scb->hscb->control |= MK_MESSAGE; 1485 } 1486 1487 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) { 1488 if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH 1489 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) { 1490 hscb->control |= ORDERED_QUEUE_TAG; 1491 dev->commands_since_idle_or_otag = 0; 1492 } else { 1493 hscb->control |= SIMPLE_QUEUE_TAG; 1494 } 1495 } 1496 1497 hscb->cdb_len = cmd->cmd_len; 1498 if (hscb->cdb_len <= 12) { 1499 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len); 1500 } else { 1501 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len); 1502 scb->flags |= SCB_CDB32_PTR; 1503 } 1504 1505 scb->platform_data->xfer_len = 0; 1506 ahc_set_residual(scb, 0); 1507 ahc_set_sense_residual(scb, 0); 1508 scb->sg_count = 0; 1509 1510 if (nseg > 0) { 1511 struct ahc_dma_seg *sg; 1512 struct scatterlist *cur_seg; 1513 int i; 1514 1515 /* Copy the segments into the SG list. */ 1516 sg = scb->sg_list; 1517 /* 1518 * The sg_count may be larger than nseg if 1519 * a transfer crosses a 32bit page. 1520 */ 1521 scsi_for_each_sg(cmd, cur_seg, nseg, i) { 1522 dma_addr_t addr; 1523 bus_size_t len; 1524 int consumed; 1525 1526 addr = sg_dma_address(cur_seg); 1527 len = sg_dma_len(cur_seg); 1528 consumed = ahc_linux_map_seg(ahc, scb, 1529 sg, addr, len); 1530 sg += consumed; 1531 scb->sg_count += consumed; 1532 } 1533 sg--; 1534 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); 1535 1536 /* 1537 * Reset the sg list pointer. 1538 */ 1539 scb->hscb->sgptr = 1540 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); 1541 1542 /* 1543 * Copy the first SG into the "current" 1544 * data pointer area. 1545 */ 1546 scb->hscb->dataptr = scb->sg_list->addr; 1547 scb->hscb->datacnt = scb->sg_list->len; 1548 } else { 1549 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL); 1550 scb->hscb->dataptr = 0; 1551 scb->hscb->datacnt = 0; 1552 scb->sg_count = 0; 1553 } 1554 1555 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links); 1556 dev->openings--; 1557 dev->active++; 1558 dev->commands_issued++; 1559 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0) 1560 dev->commands_since_idle_or_otag++; 1561 1562 scb->flags |= SCB_ACTIVE; 1563 if (untagged_q) { 1564 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe); 1565 scb->flags |= SCB_UNTAGGEDQ; 1566 } 1567 ahc_queue_scb(ahc, scb); 1568 return 0; 1569 } 1570 1571 /* 1572 * SCSI controller interrupt handler. 1573 */ 1574 irqreturn_t 1575 ahc_linux_isr(int irq, void *dev_id) 1576 { 1577 struct ahc_softc *ahc; 1578 u_long flags; 1579 int ours; 1580 1581 ahc = (struct ahc_softc *) dev_id; 1582 ahc_lock(ahc, &flags); 1583 ours = ahc_intr(ahc); 1584 ahc_unlock(ahc, &flags); 1585 return IRQ_RETVAL(ours); 1586 } 1587 1588 void 1589 ahc_platform_flushwork(struct ahc_softc *ahc) 1590 { 1591 1592 } 1593 1594 void 1595 ahc_send_async(struct ahc_softc *ahc, char channel, 1596 u_int target, u_int lun, ac_code code) 1597 { 1598 switch (code) { 1599 case AC_TRANSFER_NEG: 1600 { 1601 struct scsi_target *starget; 1602 struct ahc_initiator_tinfo *tinfo; 1603 struct ahc_tmode_tstate *tstate; 1604 int target_offset; 1605 unsigned int target_ppr_options; 1606 1607 BUG_ON(target == CAM_TARGET_WILDCARD); 1608 1609 tinfo = ahc_fetch_transinfo(ahc, channel, 1610 channel == 'A' ? ahc->our_id 1611 : ahc->our_id_b, 1612 target, &tstate); 1613 1614 /* 1615 * Don't bother reporting results while 1616 * negotiations are still pending. 1617 */ 1618 if (tinfo->curr.period != tinfo->goal.period 1619 || tinfo->curr.width != tinfo->goal.width 1620 || tinfo->curr.offset != tinfo->goal.offset 1621 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1622 if (bootverbose == 0) 1623 break; 1624 1625 /* 1626 * Don't bother reporting results that 1627 * are identical to those last reported. 1628 */ 1629 target_offset = target; 1630 if (channel == 'B') 1631 target_offset += 8; 1632 starget = ahc->platform_data->starget[target_offset]; 1633 if (starget == NULL) 1634 break; 1635 1636 target_ppr_options = 1637 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1638 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1639 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0); 1640 1641 if (tinfo->curr.period == spi_period(starget) 1642 && tinfo->curr.width == spi_width(starget) 1643 && tinfo->curr.offset == spi_offset(starget) 1644 && tinfo->curr.ppr_options == target_ppr_options) 1645 if (bootverbose == 0) 1646 break; 1647 1648 spi_period(starget) = tinfo->curr.period; 1649 spi_width(starget) = tinfo->curr.width; 1650 spi_offset(starget) = tinfo->curr.offset; 1651 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1652 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1653 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1654 spi_display_xfer_agreement(starget); 1655 break; 1656 } 1657 case AC_SENT_BDR: 1658 { 1659 WARN_ON(lun != CAM_LUN_WILDCARD); 1660 scsi_report_device_reset(ahc->platform_data->host, 1661 channel - 'A', target); 1662 break; 1663 } 1664 case AC_BUS_RESET: 1665 if (ahc->platform_data->host != NULL) { 1666 scsi_report_bus_reset(ahc->platform_data->host, 1667 channel - 'A'); 1668 } 1669 break; 1670 default: 1671 panic("ahc_send_async: Unexpected async event"); 1672 } 1673 } 1674 1675 /* 1676 * Calls the higher level scsi done function and frees the scb. 1677 */ 1678 void 1679 ahc_done(struct ahc_softc *ahc, struct scb *scb) 1680 { 1681 struct scsi_cmnd *cmd; 1682 struct ahc_linux_device *dev; 1683 1684 LIST_REMOVE(scb, pending_links); 1685 if ((scb->flags & SCB_UNTAGGEDQ) != 0) { 1686 struct scb_tailq *untagged_q; 1687 int target_offset; 1688 1689 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); 1690 untagged_q = &(ahc->untagged_queues[target_offset]); 1691 TAILQ_REMOVE(untagged_q, scb, links.tqe); 1692 BUG_ON(!TAILQ_EMPTY(untagged_q)); 1693 } else if ((scb->flags & SCB_ACTIVE) == 0) { 1694 /* 1695 * Transactions aborted from the untagged queue may 1696 * not have been dispatched to the controller, so 1697 * only check the SCB_ACTIVE flag for tagged transactions. 1698 */ 1699 printk("SCB %d done'd twice\n", scb->hscb->tag); 1700 ahc_dump_card_state(ahc); 1701 panic("Stopping for safety"); 1702 } 1703 cmd = scb->io_ctx; 1704 dev = scb->platform_data->dev; 1705 dev->active--; 1706 dev->openings++; 1707 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1708 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1709 dev->qfrozen--; 1710 } 1711 ahc_linux_unmap_scb(ahc, scb); 1712 1713 /* 1714 * Guard against stale sense data. 1715 * The Linux mid-layer assumes that sense 1716 * was retrieved anytime the first byte of 1717 * the sense buffer looks "sane". 1718 */ 1719 cmd->sense_buffer[0] = 0; 1720 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) { 1721 #ifdef AHC_REPORT_UNDERFLOWS 1722 uint32_t amount_xferred; 1723 1724 amount_xferred = 1725 ahc_get_transfer_length(scb) - ahc_get_residual(scb); 1726 #endif 1727 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1728 #ifdef AHC_DEBUG 1729 if ((ahc_debug & AHC_SHOW_MISC) != 0) { 1730 ahc_print_path(ahc, scb); 1731 printk("Set CAM_UNCOR_PARITY\n"); 1732 } 1733 #endif 1734 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY); 1735 #ifdef AHC_REPORT_UNDERFLOWS 1736 /* 1737 * This code is disabled by default as some 1738 * clients of the SCSI system do not properly 1739 * initialize the underflow parameter. This 1740 * results in spurious termination of commands 1741 * that complete as expected (e.g. underflow is 1742 * allowed as command can return variable amounts 1743 * of data. 1744 */ 1745 } else if (amount_xferred < scb->io_ctx->underflow) { 1746 u_int i; 1747 1748 ahc_print_path(ahc, scb); 1749 printk("CDB:"); 1750 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1751 printk(" 0x%x", scb->io_ctx->cmnd[i]); 1752 printk("\n"); 1753 ahc_print_path(ahc, scb); 1754 printk("Saw underflow (%ld of %ld bytes). " 1755 "Treated as error\n", 1756 ahc_get_residual(scb), 1757 ahc_get_transfer_length(scb)); 1758 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1759 #endif 1760 } else { 1761 ahc_set_transaction_status(scb, CAM_REQ_CMP); 1762 } 1763 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1764 ahc_linux_handle_scsi_status(ahc, cmd->device, scb); 1765 } 1766 1767 if (dev->openings == 1 1768 && ahc_get_transaction_status(scb) == CAM_REQ_CMP 1769 && ahc_get_scsi_status(scb) != SAM_STAT_TASK_SET_FULL) 1770 dev->tag_success_count++; 1771 /* 1772 * Some devices deal with temporary internal resource 1773 * shortages by returning queue full. When the queue 1774 * full occurrs, we throttle back. Slowly try to get 1775 * back to our previous queue depth. 1776 */ 1777 if ((dev->openings + dev->active) < dev->maxtags 1778 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) { 1779 dev->tag_success_count = 0; 1780 dev->openings++; 1781 } 1782 1783 if (dev->active == 0) 1784 dev->commands_since_idle_or_otag = 0; 1785 1786 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1787 printk("Recovery SCB completes\n"); 1788 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT 1789 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED) 1790 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1791 1792 if (ahc->platform_data->eh_done) 1793 complete(ahc->platform_data->eh_done); 1794 } 1795 1796 ahc_free_scb(ahc, scb); 1797 ahc_linux_queue_cmd_complete(ahc, cmd); 1798 } 1799 1800 static void 1801 ahc_linux_handle_scsi_status(struct ahc_softc *ahc, 1802 struct scsi_device *sdev, struct scb *scb) 1803 { 1804 struct ahc_devinfo devinfo; 1805 struct ahc_linux_device *dev = scsi_transport_device_data(sdev); 1806 1807 ahc_compile_devinfo(&devinfo, 1808 ahc->our_id, 1809 sdev->sdev_target->id, sdev->lun, 1810 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1811 ROLE_INITIATOR); 1812 1813 /* 1814 * We don't currently trust the mid-layer to 1815 * properly deal with queue full or busy. So, 1816 * when one occurs, we tell the mid-layer to 1817 * unconditionally requeue the command to us 1818 * so that we can retry it ourselves. We also 1819 * implement our own throttling mechanism so 1820 * we don't clobber the device with too many 1821 * commands. 1822 */ 1823 switch (ahc_get_scsi_status(scb)) { 1824 default: 1825 break; 1826 case SAM_STAT_CHECK_CONDITION: 1827 case SAM_STAT_COMMAND_TERMINATED: 1828 { 1829 struct scsi_cmnd *cmd; 1830 1831 /* 1832 * Copy sense information to the OS's cmd 1833 * structure if it is available. 1834 */ 1835 cmd = scb->io_ctx; 1836 if (scb->flags & SCB_SENSE) { 1837 u_int sense_size; 1838 1839 sense_size = min(sizeof(struct scsi_sense_data) 1840 - ahc_get_sense_residual(scb), 1841 (u_long)SCSI_SENSE_BUFFERSIZE); 1842 memcpy(cmd->sense_buffer, 1843 ahc_get_sense_buf(ahc, scb), sense_size); 1844 if (sense_size < SCSI_SENSE_BUFFERSIZE) 1845 memset(&cmd->sense_buffer[sense_size], 0, 1846 SCSI_SENSE_BUFFERSIZE - sense_size); 1847 #ifdef AHC_DEBUG 1848 if (ahc_debug & AHC_SHOW_SENSE) { 1849 int i; 1850 1851 printk("Copied %d bytes of sense data:", 1852 sense_size); 1853 for (i = 0; i < sense_size; i++) { 1854 if ((i & 0xF) == 0) 1855 printk("\n"); 1856 printk("0x%x ", cmd->sense_buffer[i]); 1857 } 1858 printk("\n"); 1859 } 1860 #endif 1861 } 1862 break; 1863 } 1864 case SAM_STAT_TASK_SET_FULL: 1865 { 1866 /* 1867 * By the time the core driver has returned this 1868 * command, all other commands that were queued 1869 * to us but not the device have been returned. 1870 * This ensures that dev->active is equal to 1871 * the number of commands actually queued to 1872 * the device. 1873 */ 1874 dev->tag_success_count = 0; 1875 if (dev->active != 0) { 1876 /* 1877 * Drop our opening count to the number 1878 * of commands currently outstanding. 1879 */ 1880 dev->openings = 0; 1881 /* 1882 ahc_print_path(ahc, scb); 1883 printk("Dropping tag count to %d\n", dev->active); 1884 */ 1885 if (dev->active == dev->tags_on_last_queuefull) { 1886 1887 dev->last_queuefull_same_count++; 1888 /* 1889 * If we repeatedly see a queue full 1890 * at the same queue depth, this 1891 * device has a fixed number of tag 1892 * slots. Lock in this tag depth 1893 * so we stop seeing queue fulls from 1894 * this device. 1895 */ 1896 if (dev->last_queuefull_same_count 1897 == AHC_LOCK_TAGS_COUNT) { 1898 dev->maxtags = dev->active; 1899 ahc_print_path(ahc, scb); 1900 printk("Locking max tag count at %d\n", 1901 dev->active); 1902 } 1903 } else { 1904 dev->tags_on_last_queuefull = dev->active; 1905 dev->last_queuefull_same_count = 0; 1906 } 1907 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ); 1908 ahc_set_scsi_status(scb, SAM_STAT_GOOD); 1909 ahc_platform_set_tags(ahc, sdev, &devinfo, 1910 (dev->flags & AHC_DEV_Q_BASIC) 1911 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1912 break; 1913 } 1914 /* 1915 * Drop down to a single opening, and treat this 1916 * as if the target returned BUSY SCSI status. 1917 */ 1918 dev->openings = 1; 1919 ahc_set_scsi_status(scb, SAM_STAT_BUSY); 1920 ahc_platform_set_tags(ahc, sdev, &devinfo, 1921 (dev->flags & AHC_DEV_Q_BASIC) 1922 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1923 break; 1924 } 1925 } 1926 } 1927 1928 static void 1929 ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd) 1930 { 1931 /* 1932 * Map CAM error codes into Linux Error codes. We 1933 * avoid the conversion so that the DV code has the 1934 * full error information available when making 1935 * state change decisions. 1936 */ 1937 { 1938 u_int new_status; 1939 1940 switch (ahc_cmd_get_transaction_status(cmd)) { 1941 case CAM_REQ_INPROG: 1942 case CAM_REQ_CMP: 1943 case CAM_SCSI_STATUS_ERROR: 1944 new_status = DID_OK; 1945 break; 1946 case CAM_REQ_ABORTED: 1947 new_status = DID_ABORT; 1948 break; 1949 case CAM_BUSY: 1950 new_status = DID_BUS_BUSY; 1951 break; 1952 case CAM_REQ_INVALID: 1953 case CAM_PATH_INVALID: 1954 new_status = DID_BAD_TARGET; 1955 break; 1956 case CAM_SEL_TIMEOUT: 1957 new_status = DID_NO_CONNECT; 1958 break; 1959 case CAM_SCSI_BUS_RESET: 1960 case CAM_BDR_SENT: 1961 new_status = DID_RESET; 1962 break; 1963 case CAM_UNCOR_PARITY: 1964 new_status = DID_PARITY; 1965 break; 1966 case CAM_CMD_TIMEOUT: 1967 new_status = DID_TIME_OUT; 1968 break; 1969 case CAM_UA_ABORT: 1970 case CAM_REQ_CMP_ERR: 1971 case CAM_AUTOSENSE_FAIL: 1972 case CAM_NO_HBA: 1973 case CAM_DATA_RUN_ERR: 1974 case CAM_UNEXP_BUSFREE: 1975 case CAM_SEQUENCE_FAIL: 1976 case CAM_CCB_LEN_ERR: 1977 case CAM_PROVIDE_FAIL: 1978 case CAM_REQ_TERMIO: 1979 case CAM_UNREC_HBA_ERROR: 1980 case CAM_REQ_TOO_BIG: 1981 new_status = DID_ERROR; 1982 break; 1983 case CAM_REQUEUE_REQ: 1984 new_status = DID_REQUEUE; 1985 break; 1986 default: 1987 /* We should never get here */ 1988 new_status = DID_ERROR; 1989 break; 1990 } 1991 1992 ahc_cmd_set_transaction_status(cmd, new_status); 1993 } 1994 1995 scsi_done(cmd); 1996 } 1997 1998 static void 1999 ahc_linux_freeze_simq(struct ahc_softc *ahc) 2000 { 2001 unsigned long s; 2002 2003 ahc_lock(ahc, &s); 2004 ahc->platform_data->qfrozen++; 2005 if (ahc->platform_data->qfrozen == 1) { 2006 scsi_block_requests(ahc->platform_data->host); 2007 2008 /* XXX What about Twin channels? */ 2009 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, 2010 CAM_LUN_WILDCARD, SCB_LIST_NULL, 2011 ROLE_INITIATOR, CAM_REQUEUE_REQ); 2012 } 2013 ahc_unlock(ahc, &s); 2014 } 2015 2016 static void 2017 ahc_linux_release_simq(struct ahc_softc *ahc) 2018 { 2019 u_long s; 2020 int unblock_reqs; 2021 2022 unblock_reqs = 0; 2023 ahc_lock(ahc, &s); 2024 if (ahc->platform_data->qfrozen > 0) 2025 ahc->platform_data->qfrozen--; 2026 if (ahc->platform_data->qfrozen == 0) 2027 unblock_reqs = 1; 2028 ahc_unlock(ahc, &s); 2029 /* 2030 * There is still a race here. The mid-layer 2031 * should keep its own freeze count and use 2032 * a bottom half handler to run the queues 2033 * so we can unblock with our own lock held. 2034 */ 2035 if (unblock_reqs) 2036 scsi_unblock_requests(ahc->platform_data->host); 2037 } 2038 2039 static int 2040 ahc_linux_queue_recovery_cmd(struct scsi_device *sdev, 2041 struct scsi_cmnd *cmd) 2042 { 2043 struct ahc_softc *ahc; 2044 struct ahc_linux_device *dev; 2045 struct scb *pending_scb = NULL, *scb; 2046 u_int saved_scbptr; 2047 u_int active_scb_index; 2048 u_int last_phase; 2049 u_int saved_scsiid; 2050 u_int cdb_byte; 2051 int retval; 2052 int was_paused; 2053 int paused; 2054 int wait; 2055 int disconnected; 2056 unsigned long flags; 2057 2058 paused = FALSE; 2059 wait = FALSE; 2060 ahc = *(struct ahc_softc **)sdev->host->hostdata; 2061 2062 sdev_printk(KERN_INFO, sdev, "Attempting to queue a%s message\n", 2063 cmd ? "n ABORT" : " TARGET RESET"); 2064 2065 if (cmd) { 2066 printk("CDB:"); 2067 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2068 printk(" 0x%x", cmd->cmnd[cdb_byte]); 2069 printk("\n"); 2070 } 2071 2072 ahc_lock(ahc, &flags); 2073 2074 /* 2075 * First determine if we currently own this command. 2076 * Start by searching the device queue. If not found 2077 * there, check the pending_scb list. If not found 2078 * at all, and the system wanted us to just abort the 2079 * command, return success. 2080 */ 2081 dev = scsi_transport_device_data(sdev); 2082 2083 if (dev == NULL) { 2084 /* 2085 * No target device for this command exists, 2086 * so we must not still own the command. 2087 */ 2088 printk("%s:%d:%d:%d: Is not an active device\n", 2089 ahc_name(ahc), sdev->channel, sdev->id, (u8)sdev->lun); 2090 retval = SUCCESS; 2091 goto no_cmd; 2092 } 2093 2094 if (cmd && (dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0 2095 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id, 2096 cmd->device->channel + 'A', 2097 (u8)cmd->device->lun, 2098 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) { 2099 printk("%s:%d:%d:%d: Command found on untagged queue\n", 2100 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2101 (u8)cmd->device->lun); 2102 retval = SUCCESS; 2103 goto done; 2104 } 2105 2106 /* 2107 * See if we can find a matching cmd in the pending list. 2108 */ 2109 if (cmd) { 2110 LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) { 2111 if (scb->io_ctx == cmd) { 2112 pending_scb = scb; 2113 break; 2114 } 2115 } 2116 } else { 2117 /* Any SCB for this device will do for a target reset */ 2118 LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) { 2119 if (ahc_match_scb(ahc, scb, sdev->id, 2120 sdev->channel + 'A', 2121 CAM_LUN_WILDCARD, 2122 SCB_LIST_NULL, ROLE_INITIATOR)) { 2123 pending_scb = scb; 2124 break; 2125 } 2126 } 2127 } 2128 2129 if (pending_scb == NULL) { 2130 sdev_printk(KERN_INFO, sdev, "Command not found\n"); 2131 goto no_cmd; 2132 } 2133 2134 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2135 /* 2136 * We can't queue two recovery actions using the same SCB 2137 */ 2138 retval = FAILED; 2139 goto done; 2140 } 2141 2142 /* 2143 * Ensure that the card doesn't do anything 2144 * behind our back and that we didn't "just" miss 2145 * an interrupt that would affect this cmd. 2146 */ 2147 was_paused = ahc_is_paused(ahc); 2148 ahc_pause_and_flushwork(ahc); 2149 paused = TRUE; 2150 2151 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2152 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2153 goto no_cmd; 2154 } 2155 2156 printk("%s: At time of recovery, card was %spaused\n", 2157 ahc_name(ahc), was_paused ? "" : "not "); 2158 ahc_dump_card_state(ahc); 2159 2160 disconnected = TRUE; 2161 if (cmd) { 2162 if (ahc_search_qinfifo(ahc, sdev->id, 2163 sdev->channel + 'A', 2164 sdev->lun, 2165 pending_scb->hscb->tag, 2166 ROLE_INITIATOR, CAM_REQ_ABORTED, 2167 SEARCH_COMPLETE) > 0) { 2168 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2169 ahc_name(ahc), sdev->channel, 2170 sdev->id, (u8)sdev->lun); 2171 retval = SUCCESS; 2172 goto done; 2173 } 2174 } else if (ahc_search_qinfifo(ahc, sdev->id, 2175 sdev->channel + 'A', 2176 sdev->lun, 2177 pending_scb->hscb->tag, 2178 ROLE_INITIATOR, /*status*/0, 2179 SEARCH_COUNT) > 0) { 2180 disconnected = FALSE; 2181 } 2182 2183 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2184 struct scb *bus_scb; 2185 2186 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG)); 2187 if (bus_scb == pending_scb) 2188 disconnected = FALSE; 2189 else if (!cmd 2190 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid 2191 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb)) 2192 disconnected = FALSE; 2193 } 2194 2195 /* 2196 * At this point, pending_scb is the scb associated with the 2197 * passed in command. That command is currently active on the 2198 * bus, is in the disconnected state, or we're hoping to find 2199 * a command for the same target active on the bus to abuse to 2200 * send a BDR. Queue the appropriate message based on which of 2201 * these states we are in. 2202 */ 2203 last_phase = ahc_inb(ahc, LASTPHASE); 2204 saved_scbptr = ahc_inb(ahc, SCBPTR); 2205 active_scb_index = ahc_inb(ahc, SCB_TAG); 2206 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); 2207 if (last_phase != P_BUSFREE 2208 && (pending_scb->hscb->tag == active_scb_index 2209 || (!cmd && SCSIID_TARGET(ahc, saved_scsiid) == sdev->id))) { 2210 2211 /* 2212 * We're active on the bus, so assert ATN 2213 * and hope that the target responds. 2214 */ 2215 pending_scb = ahc_lookup_scb(ahc, active_scb_index); 2216 pending_scb->flags |= SCB_RECOVERY_SCB; 2217 pending_scb->flags |= cmd ? SCB_ABORT : SCB_DEVICE_RESET; 2218 ahc_outb(ahc, MSG_OUT, HOST_MSG); 2219 ahc_outb(ahc, SCSISIGO, last_phase|ATNO); 2220 sdev_printk(KERN_INFO, sdev, "Device is active, asserting ATN\n"); 2221 wait = TRUE; 2222 } else if (disconnected) { 2223 2224 /* 2225 * Actually re-queue this SCB in an attempt 2226 * to select the device before it reconnects. 2227 * In either case (selection or reselection), 2228 * we will now issue the approprate message 2229 * to the timed-out device. 2230 * 2231 * Set the MK_MESSAGE control bit indicating 2232 * that we desire to send a message. We 2233 * also set the disconnected flag since 2234 * in the paging case there is no guarantee 2235 * that our SCB control byte matches the 2236 * version on the card. We don't want the 2237 * sequencer to abort the command thinking 2238 * an unsolicited reselection occurred. 2239 */ 2240 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2241 pending_scb->flags |= SCB_RECOVERY_SCB; 2242 pending_scb->flags |= cmd ? SCB_ABORT : SCB_DEVICE_RESET; 2243 2244 /* 2245 * Remove any cached copy of this SCB in the 2246 * disconnected list in preparation for the 2247 * queuing of our abort SCB. We use the 2248 * same element in the SCB, SCB_NEXT, for 2249 * both the qinfifo and the disconnected list. 2250 */ 2251 ahc_search_disc_list(ahc, sdev->id, 2252 sdev->channel + 'A', 2253 sdev->lun, pending_scb->hscb->tag, 2254 /*stop_on_first*/TRUE, 2255 /*remove*/TRUE, 2256 /*save_state*/FALSE); 2257 2258 /* 2259 * In the non-paging case, the sequencer will 2260 * never re-reference the in-core SCB. 2261 * To make sure we are notified during 2262 * reselection, set the MK_MESSAGE flag in 2263 * the card's copy of the SCB. 2264 */ 2265 if ((ahc->flags & AHC_PAGESCBS) == 0) { 2266 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag); 2267 ahc_outb(ahc, SCB_CONTROL, 2268 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE); 2269 } 2270 2271 /* 2272 * Clear out any entries in the QINFIFO first 2273 * so we are the next SCB for this target 2274 * to run. 2275 */ 2276 ahc_search_qinfifo(ahc, sdev->id, 2277 sdev->channel + 'A', 2278 (u8)sdev->lun, SCB_LIST_NULL, 2279 ROLE_INITIATOR, CAM_REQUEUE_REQ, 2280 SEARCH_COMPLETE); 2281 ahc_qinfifo_requeue_tail(ahc, pending_scb); 2282 ahc_outb(ahc, SCBPTR, saved_scbptr); 2283 ahc_print_path(ahc, pending_scb); 2284 printk("Device is disconnected, re-queuing SCB\n"); 2285 wait = TRUE; 2286 } else { 2287 sdev_printk(KERN_INFO, sdev, "Unable to deliver message\n"); 2288 retval = FAILED; 2289 goto done; 2290 } 2291 2292 no_cmd: 2293 /* 2294 * Our assumption is that if we don't have the command, no 2295 * recovery action was required, so we return success. Again, 2296 * the semantics of the mid-layer recovery engine are not 2297 * well defined, so this may change in time. 2298 */ 2299 retval = SUCCESS; 2300 done: 2301 if (paused) 2302 ahc_unpause(ahc); 2303 if (wait) { 2304 DECLARE_COMPLETION_ONSTACK(done); 2305 2306 ahc->platform_data->eh_done = &done; 2307 ahc_unlock(ahc, &flags); 2308 2309 printk("Recovery code sleeping\n"); 2310 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2311 ahc_lock(ahc, &flags); 2312 ahc->platform_data->eh_done = NULL; 2313 ahc_unlock(ahc, &flags); 2314 2315 printk("Timer Expired\n"); 2316 retval = FAILED; 2317 } 2318 printk("Recovery code awake\n"); 2319 } else 2320 ahc_unlock(ahc, &flags); 2321 return (retval); 2322 } 2323 2324 static void ahc_linux_set_width(struct scsi_target *starget, int width) 2325 { 2326 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2327 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2328 struct ahc_devinfo devinfo; 2329 unsigned long flags; 2330 2331 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2332 starget->channel + 'A', ROLE_INITIATOR); 2333 ahc_lock(ahc, &flags); 2334 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE); 2335 ahc_unlock(ahc, &flags); 2336 } 2337 2338 static void ahc_linux_set_period(struct scsi_target *starget, int period) 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_tmode_tstate *tstate; 2343 struct ahc_initiator_tinfo *tinfo 2344 = ahc_fetch_transinfo(ahc, 2345 starget->channel + 'A', 2346 shost->this_id, starget->id, &tstate); 2347 struct ahc_devinfo devinfo; 2348 unsigned int ppr_options = tinfo->goal.ppr_options; 2349 unsigned long flags; 2350 unsigned long offset = tinfo->goal.offset; 2351 const struct ahc_syncrate *syncrate; 2352 2353 if (offset == 0) 2354 offset = MAX_OFFSET; 2355 2356 if (period < 9) 2357 period = 9; /* 12.5ns is our minimum */ 2358 if (period == 9) { 2359 if (spi_max_width(starget)) 2360 ppr_options |= MSG_EXT_PPR_DT_REQ; 2361 else 2362 /* need wide for DT and need DT for 12.5 ns */ 2363 period = 10; 2364 } 2365 2366 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2367 starget->channel + 'A', ROLE_INITIATOR); 2368 2369 /* all PPR requests apart from QAS require wide transfers */ 2370 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2371 if (spi_width(starget) == 0) 2372 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2373 } 2374 2375 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, 2376 AHC_SYNCRATE_DT); 2377 ahc_lock(ahc, &flags); 2378 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2379 ppr_options, AHC_TRANS_GOAL, FALSE); 2380 ahc_unlock(ahc, &flags); 2381 } 2382 2383 static void ahc_linux_set_offset(struct scsi_target *starget, int offset) 2384 { 2385 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2386 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2387 struct ahc_tmode_tstate *tstate; 2388 struct ahc_initiator_tinfo *tinfo 2389 = ahc_fetch_transinfo(ahc, 2390 starget->channel + 'A', 2391 shost->this_id, starget->id, &tstate); 2392 struct ahc_devinfo devinfo; 2393 unsigned int ppr_options = 0; 2394 unsigned int period = 0; 2395 unsigned long flags; 2396 const struct ahc_syncrate *syncrate = NULL; 2397 2398 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2399 starget->channel + 'A', ROLE_INITIATOR); 2400 if (offset != 0) { 2401 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, 2402 AHC_SYNCRATE_DT); 2403 period = tinfo->goal.period; 2404 ppr_options = tinfo->goal.ppr_options; 2405 } 2406 ahc_lock(ahc, &flags); 2407 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2408 ppr_options, AHC_TRANS_GOAL, FALSE); 2409 ahc_unlock(ahc, &flags); 2410 } 2411 2412 static void ahc_linux_set_dt(struct scsi_target *starget, int dt) 2413 { 2414 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2415 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2416 struct ahc_tmode_tstate *tstate; 2417 struct ahc_initiator_tinfo *tinfo 2418 = ahc_fetch_transinfo(ahc, 2419 starget->channel + 'A', 2420 shost->this_id, starget->id, &tstate); 2421 struct ahc_devinfo devinfo; 2422 unsigned int ppr_options = tinfo->goal.ppr_options 2423 & ~MSG_EXT_PPR_DT_REQ; 2424 unsigned int period = tinfo->goal.period; 2425 unsigned int width = tinfo->goal.width; 2426 unsigned long flags; 2427 const struct ahc_syncrate *syncrate; 2428 2429 if (dt && spi_max_width(starget)) { 2430 ppr_options |= MSG_EXT_PPR_DT_REQ; 2431 if (!width) 2432 ahc_linux_set_width(starget, 1); 2433 } else if (period == 9) 2434 period = 10; /* if resetting DT, period must be >= 25ns */ 2435 2436 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2437 starget->channel + 'A', ROLE_INITIATOR); 2438 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, 2439 AHC_SYNCRATE_DT); 2440 ahc_lock(ahc, &flags); 2441 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2442 ppr_options, AHC_TRANS_GOAL, FALSE); 2443 ahc_unlock(ahc, &flags); 2444 } 2445 2446 #if 0 2447 /* FIXME: This code claims to support IU and QAS. However, the actual 2448 * sequencer code and aic7xxx_core have no support for these parameters and 2449 * will get into a bad state if they're negotiated. Do not enable this 2450 * unless you know what you're doing */ 2451 static void ahc_linux_set_qas(struct scsi_target *starget, int qas) 2452 { 2453 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2454 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2455 struct ahc_tmode_tstate *tstate; 2456 struct ahc_initiator_tinfo *tinfo 2457 = ahc_fetch_transinfo(ahc, 2458 starget->channel + 'A', 2459 shost->this_id, starget->id, &tstate); 2460 struct ahc_devinfo devinfo; 2461 unsigned int ppr_options = tinfo->goal.ppr_options 2462 & ~MSG_EXT_PPR_QAS_REQ; 2463 unsigned int period = tinfo->goal.period; 2464 unsigned long flags; 2465 struct ahc_syncrate *syncrate; 2466 2467 if (qas) 2468 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2469 2470 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2471 starget->channel + 'A', ROLE_INITIATOR); 2472 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, 2473 AHC_SYNCRATE_DT); 2474 ahc_lock(ahc, &flags); 2475 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2476 ppr_options, AHC_TRANS_GOAL, FALSE); 2477 ahc_unlock(ahc, &flags); 2478 } 2479 2480 static void ahc_linux_set_iu(struct scsi_target *starget, int iu) 2481 { 2482 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2483 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2484 struct ahc_tmode_tstate *tstate; 2485 struct ahc_initiator_tinfo *tinfo 2486 = ahc_fetch_transinfo(ahc, 2487 starget->channel + 'A', 2488 shost->this_id, starget->id, &tstate); 2489 struct ahc_devinfo devinfo; 2490 unsigned int ppr_options = tinfo->goal.ppr_options 2491 & ~MSG_EXT_PPR_IU_REQ; 2492 unsigned int period = tinfo->goal.period; 2493 unsigned long flags; 2494 struct ahc_syncrate *syncrate; 2495 2496 if (iu) 2497 ppr_options |= MSG_EXT_PPR_IU_REQ; 2498 2499 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2500 starget->channel + 'A', ROLE_INITIATOR); 2501 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, 2502 AHC_SYNCRATE_DT); 2503 ahc_lock(ahc, &flags); 2504 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2505 ppr_options, AHC_TRANS_GOAL, FALSE); 2506 ahc_unlock(ahc, &flags); 2507 } 2508 #endif 2509 2510 static void ahc_linux_get_signalling(struct Scsi_Host *shost) 2511 { 2512 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata; 2513 unsigned long flags; 2514 u8 mode; 2515 2516 if (!(ahc->features & AHC_ULTRA2)) { 2517 /* non-LVD chipset, may not have SBLKCTL reg */ 2518 spi_signalling(shost) = 2519 ahc->features & AHC_HVD ? 2520 SPI_SIGNAL_HVD : 2521 SPI_SIGNAL_SE; 2522 return; 2523 } 2524 2525 ahc_lock(ahc, &flags); 2526 ahc_pause(ahc); 2527 mode = ahc_inb(ahc, SBLKCTL); 2528 ahc_unpause(ahc); 2529 ahc_unlock(ahc, &flags); 2530 2531 if (mode & ENAB40) 2532 spi_signalling(shost) = SPI_SIGNAL_LVD; 2533 else if (mode & ENAB20) 2534 spi_signalling(shost) = SPI_SIGNAL_SE; 2535 else 2536 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2537 } 2538 2539 static struct spi_function_template ahc_linux_transport_functions = { 2540 .set_offset = ahc_linux_set_offset, 2541 .show_offset = 1, 2542 .set_period = ahc_linux_set_period, 2543 .show_period = 1, 2544 .set_width = ahc_linux_set_width, 2545 .show_width = 1, 2546 .set_dt = ahc_linux_set_dt, 2547 .show_dt = 1, 2548 #if 0 2549 .set_iu = ahc_linux_set_iu, 2550 .show_iu = 1, 2551 .set_qas = ahc_linux_set_qas, 2552 .show_qas = 1, 2553 #endif 2554 .get_signalling = ahc_linux_get_signalling, 2555 }; 2556 2557 2558 2559 static int __init 2560 ahc_linux_init(void) 2561 { 2562 /* 2563 * If we've been passed any parameters, process them now. 2564 */ 2565 if (aic7xxx) 2566 aic7xxx_setup(aic7xxx); 2567 2568 ahc_linux_transport_template = 2569 spi_attach_transport(&ahc_linux_transport_functions); 2570 if (!ahc_linux_transport_template) 2571 return -ENODEV; 2572 2573 scsi_transport_reserve_device(ahc_linux_transport_template, 2574 sizeof(struct ahc_linux_device)); 2575 2576 ahc_linux_pci_init(); 2577 ahc_linux_eisa_init(); 2578 return 0; 2579 } 2580 2581 static void 2582 ahc_linux_exit(void) 2583 { 2584 ahc_linux_pci_exit(); 2585 ahc_linux_eisa_exit(); 2586 spi_release_transport(ahc_linux_transport_template); 2587 } 2588 2589 module_init(ahc_linux_init); 2590 module_exit(ahc_linux_exit); 2591