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