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