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 * Control collection of SCSI transfer statistics for the /proc filesystem. 149 * 150 * NOTE: Do NOT enable this when running on kernels version 1.2.x and below. 151 * NOTE: This does affect performance since it has to maintain statistics. 152 */ 153 #ifdef CONFIG_AIC7XXX_PROC_STATS 154 #define AIC7XXX_PROC_STATS 155 #endif 156 157 /* 158 * To change the default number of tagged transactions allowed per-device, 159 * add a line to the lilo.conf file like: 160 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" 161 * which will result in the first four devices on the first two 162 * controllers being set to a tagged queue depth of 32. 163 * 164 * The tag_commands is an array of 16 to allow for wide and twin adapters. 165 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 166 * for channel 1. 167 */ 168 typedef struct { 169 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */ 170 } adapter_tag_info_t; 171 172 /* 173 * Modify this as you see fit for your system. 174 * 175 * 0 tagged queuing disabled 176 * 1 <= n <= 253 n == max tags ever dispatched. 177 * 178 * The driver will throttle the number of commands dispatched to a 179 * device if it returns queue full. For devices with a fixed maximum 180 * queue depth, the driver will eventually determine this depth and 181 * lock it in (a console message is printed to indicate that a lock 182 * has occurred). On some devices, queue full is returned for a temporary 183 * resource shortage. These devices will return queue full at varying 184 * depths. The driver will throttle back when the queue fulls occur and 185 * attempt to slowly increase the depth over time as the device recovers 186 * from the resource shortage. 187 * 188 * In this example, the first line will disable tagged queueing for all 189 * the devices on the first probed aic7xxx adapter. 190 * 191 * The second line enables tagged queueing with 4 commands/LUN for IDs 192 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the 193 * driver to attempt to use up to 64 tags for ID 1. 194 * 195 * The third line is the same as the first line. 196 * 197 * The fourth line disables tagged queueing for devices 0 and 3. It 198 * enables tagged queueing for the other IDs, with 16 commands/LUN 199 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for 200 * IDs 2, 5-7, and 9-15. 201 */ 202 203 /* 204 * NOTE: The below structure is for reference only, the actual structure 205 * to modify in order to change things is just below this comment block. 206 adapter_tag_info_t aic7xxx_tag_info[] = 207 { 208 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 209 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, 210 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 211 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} 212 }; 213 */ 214 215 #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE 216 #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE 217 #else 218 #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE 219 #endif 220 221 #define AIC7XXX_CONFIGED_TAG_COMMANDS { \ 222 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 223 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 224 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 225 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 226 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 227 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 228 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 229 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \ 230 } 231 232 /* 233 * By default, use the number of commands specified by 234 * the users kernel configuration. 235 */ 236 static adapter_tag_info_t aic7xxx_tag_info[] = 237 { 238 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 239 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 240 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 241 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 242 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 243 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 244 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 245 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 246 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 247 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 248 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 249 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 250 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 251 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 252 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 253 {AIC7XXX_CONFIGED_TAG_COMMANDS} 254 }; 255 256 /* 257 * There should be a specific return value for this in scsi.h, but 258 * it seems that most drivers ignore it. 259 */ 260 #define DID_UNDERFLOW DID_ERROR 261 262 void 263 ahc_print_path(struct ahc_softc *ahc, struct scb *scb) 264 { 265 printk("(scsi%d:%c:%d:%d): ", 266 ahc->platform_data->host->host_no, 267 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X', 268 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1, 269 scb != NULL ? SCB_GET_LUN(scb) : -1); 270 } 271 272 /* 273 * XXX - these options apply unilaterally to _all_ 274x/284x/294x 274 * cards in the system. This should be fixed. Exceptions to this 275 * rule are noted in the comments. 276 */ 277 278 /* 279 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This 280 * has no effect on any later resets that might occur due to things like 281 * SCSI bus timeouts. 282 */ 283 static uint32_t aic7xxx_no_reset; 284 285 /* 286 * Should we force EXTENDED translation on a controller. 287 * 0 == Use whatever is in the SEEPROM or default to off 288 * 1 == Use whatever is in the SEEPROM or default to on 289 */ 290 static uint32_t aic7xxx_extended; 291 292 /* 293 * PCI bus parity checking of the Adaptec controllers. This is somewhat 294 * dubious at best. To my knowledge, this option has never actually 295 * solved a PCI parity problem, but on certain machines with broken PCI 296 * chipset configurations where stray PCI transactions with bad parity are 297 * the norm rather than the exception, the error messages can be overwhelming. 298 * It's included in the driver for completeness. 299 * 0 = Shut off PCI parity check 300 * non-0 = reverse polarity pci parity checking 301 */ 302 static uint32_t aic7xxx_pci_parity = ~0; 303 304 /* 305 * There are lots of broken chipsets in the world. Some of them will 306 * violate the PCI spec when we issue byte sized memory writes to our 307 * controller. I/O mapped register access, if allowed by the given 308 * platform, will work in almost all cases. 309 */ 310 uint32_t aic7xxx_allow_memio = ~0; 311 312 /* 313 * So that we can set how long each device is given as a selection timeout. 314 * The table of values goes like this: 315 * 0 - 256ms 316 * 1 - 128ms 317 * 2 - 64ms 318 * 3 - 32ms 319 * We default to 256ms because some older devices need a longer time 320 * to respond to initial selection. 321 */ 322 static uint32_t aic7xxx_seltime; 323 324 /* 325 * Certain devices do not perform any aging on commands. Should the 326 * device be saturated by commands in one portion of the disk, it is 327 * possible for transactions on far away sectors to never be serviced. 328 * To handle these devices, we can periodically send an ordered tag to 329 * force all outstanding transactions to be serviced prior to a new 330 * transaction. 331 */ 332 static uint32_t aic7xxx_periodic_otag; 333 334 /* 335 * Module information and settable options. 336 */ 337 static char *aic7xxx = NULL; 338 339 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>"); 340 MODULE_DESCRIPTION("Adaptec AIC77XX/78XX SCSI Host Bus Adapter driver"); 341 MODULE_LICENSE("Dual BSD/GPL"); 342 MODULE_VERSION(AIC7XXX_DRIVER_VERSION); 343 module_param(aic7xxx, charp, 0444); 344 MODULE_PARM_DESC(aic7xxx, 345 "period-delimited options string:\n" 346 " verbose Enable verbose/diagnostic logging\n" 347 " allow_memio Allow device registers to be memory mapped\n" 348 " debug Bitmask of debug values to enable\n" 349 " no_probe Toggle EISA/VLB controller probing\n" 350 " probe_eisa_vl Toggle EISA/VLB controller probing\n" 351 " no_reset Suppress initial bus resets\n" 352 " extended Enable extended geometry on all controllers\n" 353 " periodic_otag Send an ordered tagged transaction\n" 354 " periodically to prevent tag starvation.\n" 355 " This may be required by some older disk\n" 356 " drives or RAID arrays.\n" 357 " tag_info:<tag_str> Set per-target tag depth\n" 358 " global_tag_depth:<int> Global tag depth for every target\n" 359 " on every bus\n" 360 " seltime:<int> Selection Timeout\n" 361 " (0/256ms,1/128ms,2/64ms,3/32ms)\n" 362 "\n" 363 " Sample modprobe configuration file:\n" 364 " # Toggle EISA/VLB probing\n" 365 " # Set tag depth on Controller 1/Target 1 to 10 tags\n" 366 " # Shorten the selection timeout to 128ms\n" 367 "\n" 368 " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n" 369 ); 370 371 static void ahc_linux_handle_scsi_status(struct ahc_softc *, 372 struct scsi_device *, 373 struct scb *); 374 static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, 375 struct scsi_cmnd *cmd); 376 static void ahc_linux_freeze_simq(struct ahc_softc *ahc); 377 static void ahc_linux_release_simq(struct ahc_softc *ahc); 378 static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag); 379 static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc); 380 static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc, 381 struct ahc_devinfo *devinfo); 382 static void ahc_linux_device_queue_depth(struct scsi_device *); 383 static int ahc_linux_run_command(struct ahc_softc*, 384 struct ahc_linux_device *, 385 struct scsi_cmnd *); 386 static void ahc_linux_setup_tag_info_global(char *p); 387 static int aic7xxx_setup(char *s); 388 389 static int ahc_linux_unit; 390 391 392 /************************** OS Utility Wrappers *******************************/ 393 void 394 ahc_delay(long usec) 395 { 396 /* 397 * udelay on Linux can have problems for 398 * multi-millisecond waits. Wait at most 399 * 1024us per call. 400 */ 401 while (usec > 0) { 402 udelay(usec % 1024); 403 usec -= 1024; 404 } 405 } 406 407 /***************************** Low Level I/O **********************************/ 408 uint8_t 409 ahc_inb(struct ahc_softc * ahc, long port) 410 { 411 uint8_t x; 412 413 if (ahc->tag == BUS_SPACE_MEMIO) { 414 x = readb(ahc->bsh.maddr + port); 415 } else { 416 x = inb(ahc->bsh.ioport + port); 417 } 418 mb(); 419 return (x); 420 } 421 422 void 423 ahc_outb(struct ahc_softc * ahc, long port, uint8_t val) 424 { 425 if (ahc->tag == BUS_SPACE_MEMIO) { 426 writeb(val, ahc->bsh.maddr + port); 427 } else { 428 outb(val, ahc->bsh.ioport + port); 429 } 430 mb(); 431 } 432 433 void 434 ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count) 435 { 436 int i; 437 438 /* 439 * There is probably a more efficient way to do this on Linux 440 * but we don't use this for anything speed critical and this 441 * should work. 442 */ 443 for (i = 0; i < count; i++) 444 ahc_outb(ahc, port, *array++); 445 } 446 447 void 448 ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count) 449 { 450 int i; 451 452 /* 453 * There is probably a more efficient way to do this on Linux 454 * but we don't use this for anything speed critical and this 455 * should work. 456 */ 457 for (i = 0; i < count; i++) 458 *array++ = ahc_inb(ahc, port); 459 } 460 461 /********************************* Inlines ************************************/ 462 static void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*); 463 464 static int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, 465 struct ahc_dma_seg *sg, 466 dma_addr_t addr, bus_size_t len); 467 468 static void 469 ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb) 470 { 471 struct scsi_cmnd *cmd; 472 473 cmd = scb->io_ctx; 474 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE); 475 476 scsi_dma_unmap(cmd); 477 } 478 479 static int 480 ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, 481 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len) 482 { 483 int consumed; 484 485 if ((scb->sg_count + 1) > AHC_NSEG) 486 panic("Too few segs for dma mapping. " 487 "Increase AHC_NSEG\n"); 488 489 consumed = 1; 490 sg->addr = ahc_htole32(addr & 0xFFFFFFFF); 491 scb->platform_data->xfer_len += len; 492 493 if (sizeof(dma_addr_t) > 4 494 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0) 495 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK; 496 497 sg->len = ahc_htole32(len); 498 return (consumed); 499 } 500 501 /* 502 * Return a string describing the driver. 503 */ 504 static const char * 505 ahc_linux_info(struct Scsi_Host *host) 506 { 507 static char buffer[512]; 508 char ahc_info[256]; 509 char *bp; 510 struct ahc_softc *ahc; 511 512 bp = &buffer[0]; 513 ahc = *(struct ahc_softc **)host->hostdata; 514 memset(bp, 0, sizeof(buffer)); 515 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev " AIC7XXX_DRIVER_VERSION "\n" 516 " <"); 517 strcat(bp, ahc->description); 518 strcat(bp, ">\n" 519 " "); 520 ahc_controller_info(ahc, ahc_info); 521 strcat(bp, ahc_info); 522 strcat(bp, "\n"); 523 524 return (bp); 525 } 526 527 /* 528 * Queue an SCB to the controller. 529 */ 530 static int 531 ahc_linux_queue_lck(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *)) 532 { 533 struct ahc_softc *ahc; 534 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device); 535 int rtn = SCSI_MLQUEUE_HOST_BUSY; 536 unsigned long flags; 537 538 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 539 540 ahc_lock(ahc, &flags); 541 if (ahc->platform_data->qfrozen == 0) { 542 cmd->scsi_done = scsi_done; 543 cmd->result = CAM_REQ_INPROG << 16; 544 rtn = ahc_linux_run_command(ahc, dev, cmd); 545 } 546 ahc_unlock(ahc, &flags); 547 548 return rtn; 549 } 550 551 static DEF_SCSI_QCMD(ahc_linux_queue) 552 553 static inline struct scsi_target ** 554 ahc_linux_target_in_softc(struct scsi_target *starget) 555 { 556 struct ahc_softc *ahc = 557 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); 558 unsigned int target_offset; 559 560 target_offset = starget->id; 561 if (starget->channel != 0) 562 target_offset += 8; 563 564 return &ahc->platform_data->starget[target_offset]; 565 } 566 567 static int 568 ahc_linux_target_alloc(struct scsi_target *starget) 569 { 570 struct ahc_softc *ahc = 571 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); 572 struct seeprom_config *sc = ahc->seep_config; 573 unsigned long flags; 574 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); 575 unsigned short scsirate; 576 struct ahc_devinfo devinfo; 577 struct ahc_initiator_tinfo *tinfo; 578 struct ahc_tmode_tstate *tstate; 579 char channel = starget->channel + 'A'; 580 unsigned int our_id = ahc->our_id; 581 unsigned int target_offset; 582 583 target_offset = starget->id; 584 if (starget->channel != 0) 585 target_offset += 8; 586 587 if (starget->channel) 588 our_id = ahc->our_id_b; 589 590 ahc_lock(ahc, &flags); 591 592 BUG_ON(*ahc_targp != NULL); 593 594 *ahc_targp = starget; 595 596 if (sc) { 597 int maxsync = AHC_SYNCRATE_DT; 598 int ultra = 0; 599 int flags = sc->device_flags[target_offset]; 600 601 if (ahc->flags & AHC_NEWEEPROM_FMT) { 602 if (flags & CFSYNCHISULTRA) 603 ultra = 1; 604 } else if (flags & CFULTRAEN) 605 ultra = 1; 606 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04 607 * change it to ultra=0, CFXFER = 0 */ 608 if(ultra && (flags & CFXFER) == 0x04) { 609 ultra = 0; 610 flags &= ~CFXFER; 611 } 612 613 if ((ahc->features & AHC_ULTRA2) != 0) { 614 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0); 615 } else { 616 scsirate = (flags & CFXFER) << 4; 617 maxsync = ultra ? AHC_SYNCRATE_ULTRA : 618 AHC_SYNCRATE_FAST; 619 } 620 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; 621 if (!(flags & CFSYNCH)) 622 spi_max_offset(starget) = 0; 623 spi_min_period(starget) = 624 ahc_find_period(ahc, scsirate, maxsync); 625 626 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id, 627 starget->id, &tstate); 628 } 629 ahc_compile_devinfo(&devinfo, our_id, starget->id, 630 CAM_LUN_WILDCARD, channel, 631 ROLE_INITIATOR); 632 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0, 633 AHC_TRANS_GOAL, /*paused*/FALSE); 634 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 635 AHC_TRANS_GOAL, /*paused*/FALSE); 636 ahc_unlock(ahc, &flags); 637 638 return 0; 639 } 640 641 static void 642 ahc_linux_target_destroy(struct scsi_target *starget) 643 { 644 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); 645 646 *ahc_targp = NULL; 647 } 648 649 static int 650 ahc_linux_slave_alloc(struct scsi_device *sdev) 651 { 652 struct ahc_softc *ahc = 653 *((struct ahc_softc **)sdev->host->hostdata); 654 struct scsi_target *starget = sdev->sdev_target; 655 struct ahc_linux_device *dev; 656 657 if (bootverbose) 658 printk("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id); 659 660 dev = scsi_transport_device_data(sdev); 661 memset(dev, 0, sizeof(*dev)); 662 663 /* 664 * We start out life using untagged 665 * transactions of which we allow one. 666 */ 667 dev->openings = 1; 668 669 /* 670 * Set maxtags to 0. This will be changed if we 671 * later determine that we are dealing with 672 * a tagged queuing capable device. 673 */ 674 dev->maxtags = 0; 675 676 spi_period(starget) = 0; 677 678 return 0; 679 } 680 681 static int 682 ahc_linux_slave_configure(struct scsi_device *sdev) 683 { 684 struct ahc_softc *ahc; 685 686 ahc = *((struct ahc_softc **)sdev->host->hostdata); 687 688 if (bootverbose) 689 sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); 690 691 ahc_linux_device_queue_depth(sdev); 692 693 /* Initial Domain Validation */ 694 if (!spi_initial_dv(sdev->sdev_target)) 695 spi_dv_device(sdev); 696 697 return 0; 698 } 699 700 #if defined(__i386__) 701 /* 702 * Return the disk geometry for the given SCSI device. 703 */ 704 static int 705 ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 706 sector_t capacity, int geom[]) 707 { 708 uint8_t *bh; 709 int heads; 710 int sectors; 711 int cylinders; 712 int ret; 713 int extended; 714 struct ahc_softc *ahc; 715 u_int channel; 716 717 ahc = *((struct ahc_softc **)sdev->host->hostdata); 718 channel = sdev_channel(sdev); 719 720 bh = scsi_bios_ptable(bdev); 721 if (bh) { 722 ret = scsi_partsize(bh, capacity, 723 &geom[2], &geom[0], &geom[1]); 724 kfree(bh); 725 if (ret != -1) 726 return (ret); 727 } 728 heads = 64; 729 sectors = 32; 730 cylinders = aic_sector_div(capacity, heads, sectors); 731 732 if (aic7xxx_extended != 0) 733 extended = 1; 734 else if (channel == 0) 735 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0; 736 else 737 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0; 738 if (extended && cylinders >= 1024) { 739 heads = 255; 740 sectors = 63; 741 cylinders = aic_sector_div(capacity, heads, sectors); 742 } 743 geom[0] = heads; 744 geom[1] = sectors; 745 geom[2] = cylinders; 746 return (0); 747 } 748 #endif 749 750 /* 751 * Abort the current SCSI command(s). 752 */ 753 static int 754 ahc_linux_abort(struct scsi_cmnd *cmd) 755 { 756 int error; 757 758 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT); 759 if (error != 0) 760 printk("aic7xxx_abort returns 0x%x\n", error); 761 return (error); 762 } 763 764 /* 765 * Attempt to send a target reset message to the device that timed out. 766 */ 767 static int 768 ahc_linux_dev_reset(struct scsi_cmnd *cmd) 769 { 770 int error; 771 772 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET); 773 if (error != 0) 774 printk("aic7xxx_dev_reset returns 0x%x\n", error); 775 return (error); 776 } 777 778 /* 779 * Reset the SCSI bus. 780 */ 781 static int 782 ahc_linux_bus_reset(struct scsi_cmnd *cmd) 783 { 784 struct ahc_softc *ahc; 785 int found; 786 unsigned long flags; 787 788 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 789 790 ahc_lock(ahc, &flags); 791 found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A', 792 /*initiate reset*/TRUE); 793 ahc_unlock(ahc, &flags); 794 795 if (bootverbose) 796 printk("%s: SCSI bus reset delivered. " 797 "%d SCBs aborted.\n", ahc_name(ahc), found); 798 799 return SUCCESS; 800 } 801 802 struct scsi_host_template aic7xxx_driver_template = { 803 .module = THIS_MODULE, 804 .name = "aic7xxx", 805 .proc_name = "aic7xxx", 806 .show_info = ahc_linux_show_info, 807 .write_info = ahc_proc_write_seeprom, 808 .info = ahc_linux_info, 809 .queuecommand = ahc_linux_queue, 810 .eh_abort_handler = ahc_linux_abort, 811 .eh_device_reset_handler = ahc_linux_dev_reset, 812 .eh_bus_reset_handler = ahc_linux_bus_reset, 813 #if defined(__i386__) 814 .bios_param = ahc_linux_biosparam, 815 #endif 816 .can_queue = AHC_MAX_QUEUE, 817 .this_id = -1, 818 .max_sectors = 8192, 819 .cmd_per_lun = 2, 820 .use_clustering = ENABLE_CLUSTERING, 821 .slave_alloc = ahc_linux_slave_alloc, 822 .slave_configure = ahc_linux_slave_configure, 823 .target_alloc = ahc_linux_target_alloc, 824 .target_destroy = ahc_linux_target_destroy, 825 }; 826 827 /**************************** Tasklet Handler *********************************/ 828 829 /******************************** Macros **************************************/ 830 #define BUILD_SCSIID(ahc, cmd) \ 831 ((((cmd)->device->id << TID_SHIFT) & TID) \ 832 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \ 833 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB)) 834 835 /******************************** Bus DMA *************************************/ 836 int 837 ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent, 838 bus_size_t alignment, bus_size_t boundary, 839 dma_addr_t lowaddr, dma_addr_t highaddr, 840 bus_dma_filter_t *filter, void *filterarg, 841 bus_size_t maxsize, int nsegments, 842 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 843 { 844 bus_dma_tag_t dmat; 845 846 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC); 847 if (dmat == NULL) 848 return (ENOMEM); 849 850 /* 851 * Linux is very simplistic about DMA memory. For now don't 852 * maintain all specification information. Once Linux supplies 853 * better facilities for doing these operations, or the 854 * needs of this particular driver change, we might need to do 855 * more here. 856 */ 857 dmat->alignment = alignment; 858 dmat->boundary = boundary; 859 dmat->maxsize = maxsize; 860 *ret_tag = dmat; 861 return (0); 862 } 863 864 void 865 ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat) 866 { 867 kfree(dmat); 868 } 869 870 int 871 ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr, 872 int flags, bus_dmamap_t *mapp) 873 { 874 *vaddr = pci_alloc_consistent(ahc->dev_softc, 875 dmat->maxsize, mapp); 876 if (*vaddr == NULL) 877 return ENOMEM; 878 return 0; 879 } 880 881 void 882 ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat, 883 void* vaddr, bus_dmamap_t map) 884 { 885 pci_free_consistent(ahc->dev_softc, dmat->maxsize, 886 vaddr, map); 887 } 888 889 int 890 ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map, 891 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 892 void *cb_arg, int flags) 893 { 894 /* 895 * Assume for now that this will only be used during 896 * initialization and not for per-transaction buffer mapping. 897 */ 898 bus_dma_segment_t stack_sg; 899 900 stack_sg.ds_addr = map; 901 stack_sg.ds_len = dmat->maxsize; 902 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 903 return (0); 904 } 905 906 void 907 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 908 { 909 } 910 911 int 912 ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 913 { 914 /* Nothing to do */ 915 return (0); 916 } 917 918 static void 919 ahc_linux_setup_tag_info_global(char *p) 920 { 921 int tags, i, j; 922 923 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 924 printk("Setting Global Tags= %d\n", tags); 925 926 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) { 927 for (j = 0; j < AHC_NUM_TARGETS; j++) { 928 aic7xxx_tag_info[i].tag_commands[j] = tags; 929 } 930 } 931 } 932 933 static void 934 ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 935 { 936 937 if ((instance >= 0) && (targ >= 0) 938 && (instance < ARRAY_SIZE(aic7xxx_tag_info)) 939 && (targ < AHC_NUM_TARGETS)) { 940 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff; 941 if (bootverbose) 942 printk("tag_info[%d:%d] = %d\n", instance, targ, value); 943 } 944 } 945 946 static char * 947 ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 948 void (*callback)(u_long, int, int, int32_t), 949 u_long callback_arg) 950 { 951 char *tok_end; 952 char *tok_end2; 953 int i; 954 int instance; 955 int targ; 956 int done; 957 char tok_list[] = {'.', ',', '{', '}', '\0'}; 958 959 /* All options use a ':' name/arg separator */ 960 if (*opt_arg != ':') 961 return (opt_arg); 962 opt_arg++; 963 instance = -1; 964 targ = -1; 965 done = FALSE; 966 /* 967 * Restore separator that may be in 968 * the middle of our option argument. 969 */ 970 tok_end = strchr(opt_arg, '\0'); 971 if (tok_end < end) 972 *tok_end = ','; 973 while (!done) { 974 switch (*opt_arg) { 975 case '{': 976 if (instance == -1) { 977 instance = 0; 978 } else { 979 if (depth > 1) { 980 if (targ == -1) 981 targ = 0; 982 } else { 983 printk("Malformed Option %s\n", 984 opt_name); 985 done = TRUE; 986 } 987 } 988 opt_arg++; 989 break; 990 case '}': 991 if (targ != -1) 992 targ = -1; 993 else if (instance != -1) 994 instance = -1; 995 opt_arg++; 996 break; 997 case ',': 998 case '.': 999 if (instance == -1) 1000 done = TRUE; 1001 else if (targ >= 0) 1002 targ++; 1003 else if (instance >= 0) 1004 instance++; 1005 opt_arg++; 1006 break; 1007 case '\0': 1008 done = TRUE; 1009 break; 1010 default: 1011 tok_end = end; 1012 for (i = 0; tok_list[i]; i++) { 1013 tok_end2 = strchr(opt_arg, tok_list[i]); 1014 if ((tok_end2) && (tok_end2 < tok_end)) 1015 tok_end = tok_end2; 1016 } 1017 callback(callback_arg, instance, targ, 1018 simple_strtol(opt_arg, NULL, 0)); 1019 opt_arg = tok_end; 1020 break; 1021 } 1022 } 1023 return (opt_arg); 1024 } 1025 1026 /* 1027 * Handle Linux boot parameters. This routine allows for assigning a value 1028 * to a parameter with a ':' between the parameter and the value. 1029 * ie. aic7xxx=stpwlev:1,extended 1030 */ 1031 static int 1032 aic7xxx_setup(char *s) 1033 { 1034 int i, n; 1035 char *p; 1036 char *end; 1037 1038 static const struct { 1039 const char *name; 1040 uint32_t *flag; 1041 } options[] = { 1042 { "extended", &aic7xxx_extended }, 1043 { "no_reset", &aic7xxx_no_reset }, 1044 { "verbose", &aic7xxx_verbose }, 1045 { "allow_memio", &aic7xxx_allow_memio}, 1046 #ifdef AHC_DEBUG 1047 { "debug", &ahc_debug }, 1048 #endif 1049 { "periodic_otag", &aic7xxx_periodic_otag }, 1050 { "pci_parity", &aic7xxx_pci_parity }, 1051 { "seltime", &aic7xxx_seltime }, 1052 { "tag_info", NULL }, 1053 { "global_tag_depth", NULL }, 1054 { "dv", NULL } 1055 }; 1056 1057 end = strchr(s, '\0'); 1058 1059 /* 1060 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE 1061 * will never be 0 in this case. 1062 */ 1063 n = 0; 1064 1065 while ((p = strsep(&s, ",.")) != NULL) { 1066 if (*p == '\0') 1067 continue; 1068 for (i = 0; i < ARRAY_SIZE(options); i++) { 1069 1070 n = strlen(options[i].name); 1071 if (strncmp(options[i].name, p, n) == 0) 1072 break; 1073 } 1074 if (i == ARRAY_SIZE(options)) 1075 continue; 1076 1077 if (strncmp(p, "global_tag_depth", n) == 0) { 1078 ahc_linux_setup_tag_info_global(p + n); 1079 } else if (strncmp(p, "tag_info", n) == 0) { 1080 s = ahc_parse_brace_option("tag_info", p + n, end, 1081 2, ahc_linux_setup_tag_info, 0); 1082 } else if (p[n] == ':') { 1083 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1084 } else if (strncmp(p, "verbose", n) == 0) { 1085 *(options[i].flag) = 1; 1086 } else { 1087 *(options[i].flag) ^= 0xFFFFFFFF; 1088 } 1089 } 1090 return 1; 1091 } 1092 1093 __setup("aic7xxx=", aic7xxx_setup); 1094 1095 uint32_t aic7xxx_verbose; 1096 1097 int 1098 ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template) 1099 { 1100 char buf[80]; 1101 struct Scsi_Host *host; 1102 char *new_name; 1103 u_long s; 1104 int retval; 1105 1106 template->name = ahc->description; 1107 host = scsi_host_alloc(template, sizeof(struct ahc_softc *)); 1108 if (host == NULL) 1109 return (ENOMEM); 1110 1111 *((struct ahc_softc **)host->hostdata) = ahc; 1112 ahc->platform_data->host = host; 1113 host->can_queue = AHC_MAX_QUEUE; 1114 host->cmd_per_lun = 2; 1115 /* XXX No way to communicate the ID for multiple channels */ 1116 host->this_id = ahc->our_id; 1117 host->irq = ahc->platform_data->irq; 1118 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8; 1119 host->max_lun = AHC_NUM_LUNS; 1120 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0; 1121 host->sg_tablesize = AHC_NSEG; 1122 ahc_lock(ahc, &s); 1123 ahc_set_unit(ahc, ahc_linux_unit++); 1124 ahc_unlock(ahc, &s); 1125 sprintf(buf, "scsi%d", host->host_no); 1126 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC); 1127 if (new_name != NULL) { 1128 strcpy(new_name, buf); 1129 ahc_set_name(ahc, new_name); 1130 } 1131 host->unique_id = ahc->unit; 1132 ahc_linux_initialize_scsi_bus(ahc); 1133 ahc_intr_enable(ahc, TRUE); 1134 1135 host->transportt = ahc_linux_transport_template; 1136 1137 retval = scsi_add_host(host, 1138 (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); 1139 if (retval) { 1140 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n"); 1141 scsi_host_put(host); 1142 return retval; 1143 } 1144 1145 scsi_scan_host(host); 1146 return 0; 1147 } 1148 1149 /* 1150 * Place the SCSI bus into a known state by either resetting it, 1151 * or forcing transfer negotiations on the next command to any 1152 * target. 1153 */ 1154 void 1155 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc) 1156 { 1157 int i; 1158 int numtarg; 1159 unsigned long s; 1160 1161 i = 0; 1162 numtarg = 0; 1163 1164 ahc_lock(ahc, &s); 1165 1166 if (aic7xxx_no_reset != 0) 1167 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B); 1168 1169 if ((ahc->flags & AHC_RESET_BUS_A) != 0) 1170 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE); 1171 else 1172 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8; 1173 1174 if ((ahc->features & AHC_TWIN) != 0) { 1175 1176 if ((ahc->flags & AHC_RESET_BUS_B) != 0) { 1177 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE); 1178 } else { 1179 if (numtarg == 0) 1180 i = 8; 1181 numtarg += 8; 1182 } 1183 } 1184 1185 /* 1186 * Force negotiation to async for all targets that 1187 * will not see an initial bus reset. 1188 */ 1189 for (; i < numtarg; i++) { 1190 struct ahc_devinfo devinfo; 1191 struct ahc_initiator_tinfo *tinfo; 1192 struct ahc_tmode_tstate *tstate; 1193 u_int our_id; 1194 u_int target_id; 1195 char channel; 1196 1197 channel = 'A'; 1198 our_id = ahc->our_id; 1199 target_id = i; 1200 if (i > 7 && (ahc->features & AHC_TWIN) != 0) { 1201 channel = 'B'; 1202 our_id = ahc->our_id_b; 1203 target_id = i % 8; 1204 } 1205 tinfo = ahc_fetch_transinfo(ahc, channel, our_id, 1206 target_id, &tstate); 1207 ahc_compile_devinfo(&devinfo, our_id, target_id, 1208 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR); 1209 ahc_update_neg_request(ahc, &devinfo, tstate, 1210 tinfo, AHC_NEG_ALWAYS); 1211 } 1212 ahc_unlock(ahc, &s); 1213 /* Give the bus some time to recover */ 1214 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) { 1215 ahc_linux_freeze_simq(ahc); 1216 msleep(AIC7XXX_RESET_DELAY); 1217 ahc_linux_release_simq(ahc); 1218 } 1219 } 1220 1221 int 1222 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg) 1223 { 1224 1225 ahc->platform_data = 1226 kmalloc(sizeof(struct ahc_platform_data), GFP_ATOMIC); 1227 if (ahc->platform_data == NULL) 1228 return (ENOMEM); 1229 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data)); 1230 ahc->platform_data->irq = AHC_LINUX_NOIRQ; 1231 ahc_lockinit(ahc); 1232 ahc->seltime = (aic7xxx_seltime & 0x3) << 4; 1233 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4; 1234 if (aic7xxx_pci_parity == 0) 1235 ahc->flags |= AHC_DISABLE_PCI_PERR; 1236 1237 return (0); 1238 } 1239 1240 void 1241 ahc_platform_free(struct ahc_softc *ahc) 1242 { 1243 struct scsi_target *starget; 1244 int i; 1245 1246 if (ahc->platform_data != NULL) { 1247 /* destroy all of the device and target objects */ 1248 for (i = 0; i < AHC_NUM_TARGETS; i++) { 1249 starget = ahc->platform_data->starget[i]; 1250 if (starget != NULL) { 1251 ahc->platform_data->starget[i] = NULL; 1252 } 1253 } 1254 1255 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ) 1256 free_irq(ahc->platform_data->irq, ahc); 1257 if (ahc->tag == BUS_SPACE_PIO 1258 && ahc->bsh.ioport != 0) 1259 release_region(ahc->bsh.ioport, 256); 1260 if (ahc->tag == BUS_SPACE_MEMIO 1261 && ahc->bsh.maddr != NULL) { 1262 iounmap(ahc->bsh.maddr); 1263 release_mem_region(ahc->platform_data->mem_busaddr, 1264 0x1000); 1265 } 1266 1267 if (ahc->platform_data->host) 1268 scsi_host_put(ahc->platform_data->host); 1269 1270 kfree(ahc->platform_data); 1271 } 1272 } 1273 1274 void 1275 ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb) 1276 { 1277 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb), 1278 SCB_GET_CHANNEL(ahc, scb), 1279 SCB_GET_LUN(scb), SCB_LIST_NULL, 1280 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1281 } 1282 1283 void 1284 ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev, 1285 struct ahc_devinfo *devinfo, ahc_queue_alg alg) 1286 { 1287 struct ahc_linux_device *dev; 1288 int was_queuing; 1289 int now_queuing; 1290 1291 if (sdev == NULL) 1292 return; 1293 dev = scsi_transport_device_data(sdev); 1294 1295 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED); 1296 switch (alg) { 1297 default: 1298 case AHC_QUEUE_NONE: 1299 now_queuing = 0; 1300 break; 1301 case AHC_QUEUE_BASIC: 1302 now_queuing = AHC_DEV_Q_BASIC; 1303 break; 1304 case AHC_QUEUE_TAGGED: 1305 now_queuing = AHC_DEV_Q_TAGGED; 1306 break; 1307 } 1308 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0 1309 && (was_queuing != now_queuing) 1310 && (dev->active != 0)) { 1311 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY; 1312 dev->qfrozen++; 1313 } 1314 1315 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG); 1316 if (now_queuing) { 1317 u_int usertags; 1318 1319 usertags = ahc_linux_user_tagdepth(ahc, devinfo); 1320 if (!was_queuing) { 1321 /* 1322 * Start out aggressively and allow our 1323 * dynamic queue depth algorithm to take 1324 * care of the rest. 1325 */ 1326 dev->maxtags = usertags; 1327 dev->openings = dev->maxtags - dev->active; 1328 } 1329 if (dev->maxtags == 0) { 1330 /* 1331 * Queueing is disabled by the user. 1332 */ 1333 dev->openings = 1; 1334 } else if (alg == AHC_QUEUE_TAGGED) { 1335 dev->flags |= AHC_DEV_Q_TAGGED; 1336 if (aic7xxx_periodic_otag != 0) 1337 dev->flags |= AHC_DEV_PERIODIC_OTAG; 1338 } else 1339 dev->flags |= AHC_DEV_Q_BASIC; 1340 } else { 1341 /* We can only have one opening. */ 1342 dev->maxtags = 0; 1343 dev->openings = 1 - dev->active; 1344 } 1345 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) { 1346 case AHC_DEV_Q_BASIC: 1347 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); 1348 scsi_activate_tcq(sdev, dev->openings + dev->active); 1349 break; 1350 case AHC_DEV_Q_TAGGED: 1351 scsi_set_tag_type(sdev, MSG_ORDERED_TAG); 1352 scsi_activate_tcq(sdev, dev->openings + dev->active); 1353 break; 1354 default: 1355 /* 1356 * We allow the OS to queue 2 untagged transactions to 1357 * us at any time even though we can only execute them 1358 * serially on the controller/device. This should 1359 * remove some latency. 1360 */ 1361 scsi_deactivate_tcq(sdev, 2); 1362 break; 1363 } 1364 } 1365 1366 int 1367 ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel, 1368 int lun, u_int tag, role_t role, uint32_t status) 1369 { 1370 return 0; 1371 } 1372 1373 static u_int 1374 ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 1375 { 1376 static int warned_user; 1377 u_int tags; 1378 1379 tags = 0; 1380 if ((ahc->user_discenable & devinfo->target_mask) != 0) { 1381 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) { 1382 if (warned_user == 0) { 1383 1384 printk(KERN_WARNING 1385 "aic7xxx: WARNING: Insufficient tag_info instances\n" 1386 "aic7xxx: for installed controllers. Using defaults\n" 1387 "aic7xxx: Please update the aic7xxx_tag_info array in\n" 1388 "aic7xxx: the aic7xxx_osm..c source file.\n"); 1389 warned_user++; 1390 } 1391 tags = AHC_MAX_QUEUE; 1392 } else { 1393 adapter_tag_info_t *tag_info; 1394 1395 tag_info = &aic7xxx_tag_info[ahc->unit]; 1396 tags = tag_info->tag_commands[devinfo->target_offset]; 1397 if (tags > AHC_MAX_QUEUE) 1398 tags = AHC_MAX_QUEUE; 1399 } 1400 } 1401 return (tags); 1402 } 1403 1404 /* 1405 * Determines the queue depth for a given device. 1406 */ 1407 static void 1408 ahc_linux_device_queue_depth(struct scsi_device *sdev) 1409 { 1410 struct ahc_devinfo devinfo; 1411 u_int tags; 1412 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata); 1413 1414 ahc_compile_devinfo(&devinfo, 1415 sdev->sdev_target->channel == 0 1416 ? ahc->our_id : ahc->our_id_b, 1417 sdev->sdev_target->id, sdev->lun, 1418 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1419 ROLE_INITIATOR); 1420 tags = ahc_linux_user_tagdepth(ahc, &devinfo); 1421 if (tags != 0 && sdev->tagged_supported != 0) { 1422 1423 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED); 1424 ahc_send_async(ahc, devinfo.channel, devinfo.target, 1425 devinfo.lun, AC_TRANSFER_NEG); 1426 ahc_print_devinfo(ahc, &devinfo); 1427 printk("Tagged Queuing enabled. Depth %d\n", tags); 1428 } else { 1429 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE); 1430 ahc_send_async(ahc, devinfo.channel, devinfo.target, 1431 devinfo.lun, AC_TRANSFER_NEG); 1432 } 1433 } 1434 1435 static int 1436 ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev, 1437 struct scsi_cmnd *cmd) 1438 { 1439 struct scb *scb; 1440 struct hardware_scb *hscb; 1441 struct ahc_initiator_tinfo *tinfo; 1442 struct ahc_tmode_tstate *tstate; 1443 uint16_t mask; 1444 struct scb_tailq *untagged_q = NULL; 1445 int nseg; 1446 1447 /* 1448 * Schedule us to run later. The only reason we are not 1449 * running is because the whole controller Q is frozen. 1450 */ 1451 if (ahc->platform_data->qfrozen != 0) 1452 return SCSI_MLQUEUE_HOST_BUSY; 1453 1454 /* 1455 * We only allow one untagged transaction 1456 * per target in the initiator role unless 1457 * we are storing a full busy target *lun* 1458 * table in SCB space. 1459 */ 1460 if (!blk_rq_tagged(cmd->request) 1461 && (ahc->features & AHC_SCB_BTT) == 0) { 1462 int target_offset; 1463 1464 target_offset = cmd->device->id + cmd->device->channel * 8; 1465 untagged_q = &(ahc->untagged_queues[target_offset]); 1466 if (!TAILQ_EMPTY(untagged_q)) 1467 /* if we're already executing an untagged command 1468 * we're busy to another */ 1469 return SCSI_MLQUEUE_DEVICE_BUSY; 1470 } 1471 1472 nseg = scsi_dma_map(cmd); 1473 if (nseg < 0) 1474 return SCSI_MLQUEUE_HOST_BUSY; 1475 1476 /* 1477 * Get an scb to use. 1478 */ 1479 scb = ahc_get_scb(ahc); 1480 if (!scb) { 1481 scsi_dma_unmap(cmd); 1482 return SCSI_MLQUEUE_HOST_BUSY; 1483 } 1484 1485 scb->io_ctx = cmd; 1486 scb->platform_data->dev = dev; 1487 hscb = scb->hscb; 1488 cmd->host_scribble = (char *)scb; 1489 1490 /* 1491 * Fill out basics of the HSCB. 1492 */ 1493 hscb->control = 0; 1494 hscb->scsiid = BUILD_SCSIID(ahc, cmd); 1495 hscb->lun = cmd->device->lun; 1496 mask = SCB_GET_TARGET_MASK(ahc, scb); 1497 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb), 1498 SCB_GET_OUR_ID(scb), 1499 SCB_GET_TARGET(ahc, scb), &tstate); 1500 hscb->scsirate = tinfo->scsirate; 1501 hscb->scsioffset = tinfo->curr.offset; 1502 if ((tstate->ultraenb & mask) != 0) 1503 hscb->control |= ULTRAENB; 1504 1505 if ((ahc->user_discenable & mask) != 0) 1506 hscb->control |= DISCENB; 1507 1508 if ((tstate->auto_negotiate & mask) != 0) { 1509 scb->flags |= SCB_AUTO_NEGOTIATE; 1510 scb->hscb->control |= MK_MESSAGE; 1511 } 1512 1513 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) { 1514 int msg_bytes; 1515 uint8_t tag_msgs[2]; 1516 1517 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); 1518 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { 1519 hscb->control |= tag_msgs[0]; 1520 if (tag_msgs[0] == MSG_ORDERED_TASK) 1521 dev->commands_since_idle_or_otag = 0; 1522 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH 1523 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) { 1524 hscb->control |= MSG_ORDERED_TASK; 1525 dev->commands_since_idle_or_otag = 0; 1526 } else { 1527 hscb->control |= MSG_SIMPLE_TASK; 1528 } 1529 } 1530 1531 hscb->cdb_len = cmd->cmd_len; 1532 if (hscb->cdb_len <= 12) { 1533 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len); 1534 } else { 1535 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len); 1536 scb->flags |= SCB_CDB32_PTR; 1537 } 1538 1539 scb->platform_data->xfer_len = 0; 1540 ahc_set_residual(scb, 0); 1541 ahc_set_sense_residual(scb, 0); 1542 scb->sg_count = 0; 1543 1544 if (nseg > 0) { 1545 struct ahc_dma_seg *sg; 1546 struct scatterlist *cur_seg; 1547 int i; 1548 1549 /* Copy the segments into the SG list. */ 1550 sg = scb->sg_list; 1551 /* 1552 * The sg_count may be larger than nseg if 1553 * a transfer crosses a 32bit page. 1554 */ 1555 scsi_for_each_sg(cmd, cur_seg, nseg, i) { 1556 dma_addr_t addr; 1557 bus_size_t len; 1558 int consumed; 1559 1560 addr = sg_dma_address(cur_seg); 1561 len = sg_dma_len(cur_seg); 1562 consumed = ahc_linux_map_seg(ahc, scb, 1563 sg, addr, len); 1564 sg += consumed; 1565 scb->sg_count += consumed; 1566 } 1567 sg--; 1568 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); 1569 1570 /* 1571 * Reset the sg list pointer. 1572 */ 1573 scb->hscb->sgptr = 1574 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); 1575 1576 /* 1577 * Copy the first SG into the "current" 1578 * data pointer area. 1579 */ 1580 scb->hscb->dataptr = scb->sg_list->addr; 1581 scb->hscb->datacnt = scb->sg_list->len; 1582 } else { 1583 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL); 1584 scb->hscb->dataptr = 0; 1585 scb->hscb->datacnt = 0; 1586 scb->sg_count = 0; 1587 } 1588 1589 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links); 1590 dev->openings--; 1591 dev->active++; 1592 dev->commands_issued++; 1593 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0) 1594 dev->commands_since_idle_or_otag++; 1595 1596 scb->flags |= SCB_ACTIVE; 1597 if (untagged_q) { 1598 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe); 1599 scb->flags |= SCB_UNTAGGEDQ; 1600 } 1601 ahc_queue_scb(ahc, scb); 1602 return 0; 1603 } 1604 1605 /* 1606 * SCSI controller interrupt handler. 1607 */ 1608 irqreturn_t 1609 ahc_linux_isr(int irq, void *dev_id) 1610 { 1611 struct ahc_softc *ahc; 1612 u_long flags; 1613 int ours; 1614 1615 ahc = (struct ahc_softc *) dev_id; 1616 ahc_lock(ahc, &flags); 1617 ours = ahc_intr(ahc); 1618 ahc_unlock(ahc, &flags); 1619 return IRQ_RETVAL(ours); 1620 } 1621 1622 void 1623 ahc_platform_flushwork(struct ahc_softc *ahc) 1624 { 1625 1626 } 1627 1628 void 1629 ahc_send_async(struct ahc_softc *ahc, char channel, 1630 u_int target, u_int lun, ac_code code) 1631 { 1632 switch (code) { 1633 case AC_TRANSFER_NEG: 1634 { 1635 struct scsi_target *starget; 1636 struct ahc_linux_target *targ; 1637 struct ahc_initiator_tinfo *tinfo; 1638 struct ahc_tmode_tstate *tstate; 1639 int target_offset; 1640 unsigned int target_ppr_options; 1641 1642 BUG_ON(target == CAM_TARGET_WILDCARD); 1643 1644 tinfo = ahc_fetch_transinfo(ahc, channel, 1645 channel == 'A' ? ahc->our_id 1646 : ahc->our_id_b, 1647 target, &tstate); 1648 1649 /* 1650 * Don't bother reporting results while 1651 * negotiations are still pending. 1652 */ 1653 if (tinfo->curr.period != tinfo->goal.period 1654 || tinfo->curr.width != tinfo->goal.width 1655 || tinfo->curr.offset != tinfo->goal.offset 1656 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1657 if (bootverbose == 0) 1658 break; 1659 1660 /* 1661 * Don't bother reporting results that 1662 * are identical to those last reported. 1663 */ 1664 target_offset = target; 1665 if (channel == 'B') 1666 target_offset += 8; 1667 starget = ahc->platform_data->starget[target_offset]; 1668 if (starget == NULL) 1669 break; 1670 targ = scsi_transport_target_data(starget); 1671 1672 target_ppr_options = 1673 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1674 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1675 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0); 1676 1677 if (tinfo->curr.period == spi_period(starget) 1678 && tinfo->curr.width == spi_width(starget) 1679 && tinfo->curr.offset == spi_offset(starget) 1680 && tinfo->curr.ppr_options == target_ppr_options) 1681 if (bootverbose == 0) 1682 break; 1683 1684 spi_period(starget) = tinfo->curr.period; 1685 spi_width(starget) = tinfo->curr.width; 1686 spi_offset(starget) = tinfo->curr.offset; 1687 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1688 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1689 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1690 spi_display_xfer_agreement(starget); 1691 break; 1692 } 1693 case AC_SENT_BDR: 1694 { 1695 WARN_ON(lun != CAM_LUN_WILDCARD); 1696 scsi_report_device_reset(ahc->platform_data->host, 1697 channel - 'A', target); 1698 break; 1699 } 1700 case AC_BUS_RESET: 1701 if (ahc->platform_data->host != NULL) { 1702 scsi_report_bus_reset(ahc->platform_data->host, 1703 channel - 'A'); 1704 } 1705 break; 1706 default: 1707 panic("ahc_send_async: Unexpected async event"); 1708 } 1709 } 1710 1711 /* 1712 * Calls the higher level scsi done function and frees the scb. 1713 */ 1714 void 1715 ahc_done(struct ahc_softc *ahc, struct scb *scb) 1716 { 1717 struct scsi_cmnd *cmd; 1718 struct ahc_linux_device *dev; 1719 1720 LIST_REMOVE(scb, pending_links); 1721 if ((scb->flags & SCB_UNTAGGEDQ) != 0) { 1722 struct scb_tailq *untagged_q; 1723 int target_offset; 1724 1725 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); 1726 untagged_q = &(ahc->untagged_queues[target_offset]); 1727 TAILQ_REMOVE(untagged_q, scb, links.tqe); 1728 BUG_ON(!TAILQ_EMPTY(untagged_q)); 1729 } else if ((scb->flags & SCB_ACTIVE) == 0) { 1730 /* 1731 * Transactions aborted from the untagged queue may 1732 * not have been dispatched to the controller, so 1733 * only check the SCB_ACTIVE flag for tagged transactions. 1734 */ 1735 printk("SCB %d done'd twice\n", scb->hscb->tag); 1736 ahc_dump_card_state(ahc); 1737 panic("Stopping for safety"); 1738 } 1739 cmd = scb->io_ctx; 1740 dev = scb->platform_data->dev; 1741 dev->active--; 1742 dev->openings++; 1743 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1744 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1745 dev->qfrozen--; 1746 } 1747 ahc_linux_unmap_scb(ahc, scb); 1748 1749 /* 1750 * Guard against stale sense data. 1751 * The Linux mid-layer assumes that sense 1752 * was retrieved anytime the first byte of 1753 * the sense buffer looks "sane". 1754 */ 1755 cmd->sense_buffer[0] = 0; 1756 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) { 1757 uint32_t amount_xferred; 1758 1759 amount_xferred = 1760 ahc_get_transfer_length(scb) - ahc_get_residual(scb); 1761 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1762 #ifdef AHC_DEBUG 1763 if ((ahc_debug & AHC_SHOW_MISC) != 0) { 1764 ahc_print_path(ahc, scb); 1765 printk("Set CAM_UNCOR_PARITY\n"); 1766 } 1767 #endif 1768 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY); 1769 #ifdef AHC_REPORT_UNDERFLOWS 1770 /* 1771 * This code is disabled by default as some 1772 * clients of the SCSI system do not properly 1773 * initialize the underflow parameter. This 1774 * results in spurious termination of commands 1775 * that complete as expected (e.g. underflow is 1776 * allowed as command can return variable amounts 1777 * of data. 1778 */ 1779 } else if (amount_xferred < scb->io_ctx->underflow) { 1780 u_int i; 1781 1782 ahc_print_path(ahc, scb); 1783 printk("CDB:"); 1784 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1785 printk(" 0x%x", scb->io_ctx->cmnd[i]); 1786 printk("\n"); 1787 ahc_print_path(ahc, scb); 1788 printk("Saw underflow (%ld of %ld bytes). " 1789 "Treated as error\n", 1790 ahc_get_residual(scb), 1791 ahc_get_transfer_length(scb)); 1792 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1793 #endif 1794 } else { 1795 ahc_set_transaction_status(scb, CAM_REQ_CMP); 1796 } 1797 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1798 ahc_linux_handle_scsi_status(ahc, cmd->device, scb); 1799 } 1800 1801 if (dev->openings == 1 1802 && ahc_get_transaction_status(scb) == CAM_REQ_CMP 1803 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1804 dev->tag_success_count++; 1805 /* 1806 * Some devices deal with temporary internal resource 1807 * shortages by returning queue full. When the queue 1808 * full occurrs, we throttle back. Slowly try to get 1809 * back to our previous queue depth. 1810 */ 1811 if ((dev->openings + dev->active) < dev->maxtags 1812 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) { 1813 dev->tag_success_count = 0; 1814 dev->openings++; 1815 } 1816 1817 if (dev->active == 0) 1818 dev->commands_since_idle_or_otag = 0; 1819 1820 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1821 printk("Recovery SCB completes\n"); 1822 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT 1823 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED) 1824 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1825 1826 if (ahc->platform_data->eh_done) 1827 complete(ahc->platform_data->eh_done); 1828 } 1829 1830 ahc_free_scb(ahc, scb); 1831 ahc_linux_queue_cmd_complete(ahc, cmd); 1832 } 1833 1834 static void 1835 ahc_linux_handle_scsi_status(struct ahc_softc *ahc, 1836 struct scsi_device *sdev, struct scb *scb) 1837 { 1838 struct ahc_devinfo devinfo; 1839 struct ahc_linux_device *dev = scsi_transport_device_data(sdev); 1840 1841 ahc_compile_devinfo(&devinfo, 1842 ahc->our_id, 1843 sdev->sdev_target->id, sdev->lun, 1844 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1845 ROLE_INITIATOR); 1846 1847 /* 1848 * We don't currently trust the mid-layer to 1849 * properly deal with queue full or busy. So, 1850 * when one occurs, we tell the mid-layer to 1851 * unconditionally requeue the command to us 1852 * so that we can retry it ourselves. We also 1853 * implement our own throttling mechanism so 1854 * we don't clobber the device with too many 1855 * commands. 1856 */ 1857 switch (ahc_get_scsi_status(scb)) { 1858 default: 1859 break; 1860 case SCSI_STATUS_CHECK_COND: 1861 case SCSI_STATUS_CMD_TERMINATED: 1862 { 1863 struct scsi_cmnd *cmd; 1864 1865 /* 1866 * Copy sense information to the OS's cmd 1867 * structure if it is available. 1868 */ 1869 cmd = scb->io_ctx; 1870 if (scb->flags & SCB_SENSE) { 1871 u_int sense_size; 1872 1873 sense_size = min(sizeof(struct scsi_sense_data) 1874 - ahc_get_sense_residual(scb), 1875 (u_long)SCSI_SENSE_BUFFERSIZE); 1876 memcpy(cmd->sense_buffer, 1877 ahc_get_sense_buf(ahc, scb), sense_size); 1878 if (sense_size < SCSI_SENSE_BUFFERSIZE) 1879 memset(&cmd->sense_buffer[sense_size], 0, 1880 SCSI_SENSE_BUFFERSIZE - sense_size); 1881 cmd->result |= (DRIVER_SENSE << 24); 1882 #ifdef AHC_DEBUG 1883 if (ahc_debug & AHC_SHOW_SENSE) { 1884 int i; 1885 1886 printk("Copied %d bytes of sense data:", 1887 sense_size); 1888 for (i = 0; i < sense_size; i++) { 1889 if ((i & 0xF) == 0) 1890 printk("\n"); 1891 printk("0x%x ", cmd->sense_buffer[i]); 1892 } 1893 printk("\n"); 1894 } 1895 #endif 1896 } 1897 break; 1898 } 1899 case SCSI_STATUS_QUEUE_FULL: 1900 { 1901 /* 1902 * By the time the core driver has returned this 1903 * command, all other commands that were queued 1904 * to us but not the device have been returned. 1905 * This ensures that dev->active is equal to 1906 * the number of commands actually queued to 1907 * the device. 1908 */ 1909 dev->tag_success_count = 0; 1910 if (dev->active != 0) { 1911 /* 1912 * Drop our opening count to the number 1913 * of commands currently outstanding. 1914 */ 1915 dev->openings = 0; 1916 /* 1917 ahc_print_path(ahc, scb); 1918 printk("Dropping tag count to %d\n", dev->active); 1919 */ 1920 if (dev->active == dev->tags_on_last_queuefull) { 1921 1922 dev->last_queuefull_same_count++; 1923 /* 1924 * If we repeatedly see a queue full 1925 * at the same queue depth, this 1926 * device has a fixed number of tag 1927 * slots. Lock in this tag depth 1928 * so we stop seeing queue fulls from 1929 * this device. 1930 */ 1931 if (dev->last_queuefull_same_count 1932 == AHC_LOCK_TAGS_COUNT) { 1933 dev->maxtags = dev->active; 1934 ahc_print_path(ahc, scb); 1935 printk("Locking max tag count at %d\n", 1936 dev->active); 1937 } 1938 } else { 1939 dev->tags_on_last_queuefull = dev->active; 1940 dev->last_queuefull_same_count = 0; 1941 } 1942 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ); 1943 ahc_set_scsi_status(scb, SCSI_STATUS_OK); 1944 ahc_platform_set_tags(ahc, sdev, &devinfo, 1945 (dev->flags & AHC_DEV_Q_BASIC) 1946 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1947 break; 1948 } 1949 /* 1950 * Drop down to a single opening, and treat this 1951 * as if the target returned BUSY SCSI status. 1952 */ 1953 dev->openings = 1; 1954 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY); 1955 ahc_platform_set_tags(ahc, sdev, &devinfo, 1956 (dev->flags & AHC_DEV_Q_BASIC) 1957 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1958 break; 1959 } 1960 } 1961 } 1962 1963 static void 1964 ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd) 1965 { 1966 /* 1967 * Map CAM error codes into Linux Error codes. We 1968 * avoid the conversion so that the DV code has the 1969 * full error information available when making 1970 * state change decisions. 1971 */ 1972 { 1973 u_int new_status; 1974 1975 switch (ahc_cmd_get_transaction_status(cmd)) { 1976 case CAM_REQ_INPROG: 1977 case CAM_REQ_CMP: 1978 case CAM_SCSI_STATUS_ERROR: 1979 new_status = DID_OK; 1980 break; 1981 case CAM_REQ_ABORTED: 1982 new_status = DID_ABORT; 1983 break; 1984 case CAM_BUSY: 1985 new_status = DID_BUS_BUSY; 1986 break; 1987 case CAM_REQ_INVALID: 1988 case CAM_PATH_INVALID: 1989 new_status = DID_BAD_TARGET; 1990 break; 1991 case CAM_SEL_TIMEOUT: 1992 new_status = DID_NO_CONNECT; 1993 break; 1994 case CAM_SCSI_BUS_RESET: 1995 case CAM_BDR_SENT: 1996 new_status = DID_RESET; 1997 break; 1998 case CAM_UNCOR_PARITY: 1999 new_status = DID_PARITY; 2000 break; 2001 case CAM_CMD_TIMEOUT: 2002 new_status = DID_TIME_OUT; 2003 break; 2004 case CAM_UA_ABORT: 2005 case CAM_REQ_CMP_ERR: 2006 case CAM_AUTOSENSE_FAIL: 2007 case CAM_NO_HBA: 2008 case CAM_DATA_RUN_ERR: 2009 case CAM_UNEXP_BUSFREE: 2010 case CAM_SEQUENCE_FAIL: 2011 case CAM_CCB_LEN_ERR: 2012 case CAM_PROVIDE_FAIL: 2013 case CAM_REQ_TERMIO: 2014 case CAM_UNREC_HBA_ERROR: 2015 case CAM_REQ_TOO_BIG: 2016 new_status = DID_ERROR; 2017 break; 2018 case CAM_REQUEUE_REQ: 2019 new_status = DID_REQUEUE; 2020 break; 2021 default: 2022 /* We should never get here */ 2023 new_status = DID_ERROR; 2024 break; 2025 } 2026 2027 ahc_cmd_set_transaction_status(cmd, new_status); 2028 } 2029 2030 cmd->scsi_done(cmd); 2031 } 2032 2033 static void 2034 ahc_linux_freeze_simq(struct ahc_softc *ahc) 2035 { 2036 unsigned long s; 2037 2038 ahc_lock(ahc, &s); 2039 ahc->platform_data->qfrozen++; 2040 if (ahc->platform_data->qfrozen == 1) { 2041 scsi_block_requests(ahc->platform_data->host); 2042 2043 /* XXX What about Twin channels? */ 2044 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, 2045 CAM_LUN_WILDCARD, SCB_LIST_NULL, 2046 ROLE_INITIATOR, CAM_REQUEUE_REQ); 2047 } 2048 ahc_unlock(ahc, &s); 2049 } 2050 2051 static void 2052 ahc_linux_release_simq(struct ahc_softc *ahc) 2053 { 2054 u_long s; 2055 int unblock_reqs; 2056 2057 unblock_reqs = 0; 2058 ahc_lock(ahc, &s); 2059 if (ahc->platform_data->qfrozen > 0) 2060 ahc->platform_data->qfrozen--; 2061 if (ahc->platform_data->qfrozen == 0) 2062 unblock_reqs = 1; 2063 ahc_unlock(ahc, &s); 2064 /* 2065 * There is still a race here. The mid-layer 2066 * should keep its own freeze count and use 2067 * a bottom half handler to run the queues 2068 * so we can unblock with our own lock held. 2069 */ 2070 if (unblock_reqs) 2071 scsi_unblock_requests(ahc->platform_data->host); 2072 } 2073 2074 static int 2075 ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag) 2076 { 2077 struct ahc_softc *ahc; 2078 struct ahc_linux_device *dev; 2079 struct scb *pending_scb; 2080 u_int saved_scbptr; 2081 u_int active_scb_index; 2082 u_int last_phase; 2083 u_int saved_scsiid; 2084 u_int cdb_byte; 2085 int retval; 2086 int was_paused; 2087 int paused; 2088 int wait; 2089 int disconnected; 2090 unsigned long flags; 2091 2092 pending_scb = NULL; 2093 paused = FALSE; 2094 wait = FALSE; 2095 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 2096 2097 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n", 2098 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET"); 2099 2100 printk("CDB:"); 2101 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2102 printk(" 0x%x", cmd->cmnd[cdb_byte]); 2103 printk("\n"); 2104 2105 ahc_lock(ahc, &flags); 2106 2107 /* 2108 * First determine if we currently own this command. 2109 * Start by searching the device queue. If not found 2110 * there, check the pending_scb list. If not found 2111 * at all, and the system wanted us to just abort the 2112 * command, return success. 2113 */ 2114 dev = scsi_transport_device_data(cmd->device); 2115 2116 if (dev == NULL) { 2117 /* 2118 * No target device for this command exists, 2119 * so we must not still own the command. 2120 */ 2121 printk("%s:%d:%d:%d: Is not an active device\n", 2122 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2123 cmd->device->lun); 2124 retval = SUCCESS; 2125 goto no_cmd; 2126 } 2127 2128 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0 2129 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id, 2130 cmd->device->channel + 'A', 2131 cmd->device->lun, 2132 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) { 2133 printk("%s:%d:%d:%d: Command found on untagged queue\n", 2134 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2135 cmd->device->lun); 2136 retval = SUCCESS; 2137 goto done; 2138 } 2139 2140 /* 2141 * See if we can find a matching cmd in the pending list. 2142 */ 2143 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2144 if (pending_scb->io_ctx == cmd) 2145 break; 2146 } 2147 2148 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) { 2149 2150 /* Any SCB for this device will do for a target reset */ 2151 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2152 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd), 2153 scmd_channel(cmd) + 'A', 2154 CAM_LUN_WILDCARD, 2155 SCB_LIST_NULL, ROLE_INITIATOR)) 2156 break; 2157 } 2158 } 2159 2160 if (pending_scb == NULL) { 2161 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2162 goto no_cmd; 2163 } 2164 2165 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2166 /* 2167 * We can't queue two recovery actions using the same SCB 2168 */ 2169 retval = FAILED; 2170 goto done; 2171 } 2172 2173 /* 2174 * Ensure that the card doesn't do anything 2175 * behind our back and that we didn't "just" miss 2176 * an interrupt that would affect this cmd. 2177 */ 2178 was_paused = ahc_is_paused(ahc); 2179 ahc_pause_and_flushwork(ahc); 2180 paused = TRUE; 2181 2182 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2183 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2184 goto no_cmd; 2185 } 2186 2187 printk("%s: At time of recovery, card was %spaused\n", 2188 ahc_name(ahc), was_paused ? "" : "not "); 2189 ahc_dump_card_state(ahc); 2190 2191 disconnected = TRUE; 2192 if (flag == SCB_ABORT) { 2193 if (ahc_search_qinfifo(ahc, cmd->device->id, 2194 cmd->device->channel + 'A', 2195 cmd->device->lun, 2196 pending_scb->hscb->tag, 2197 ROLE_INITIATOR, CAM_REQ_ABORTED, 2198 SEARCH_COMPLETE) > 0) { 2199 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2200 ahc_name(ahc), cmd->device->channel, 2201 cmd->device->id, cmd->device->lun); 2202 retval = SUCCESS; 2203 goto done; 2204 } 2205 } else if (ahc_search_qinfifo(ahc, cmd->device->id, 2206 cmd->device->channel + 'A', 2207 cmd->device->lun, pending_scb->hscb->tag, 2208 ROLE_INITIATOR, /*status*/0, 2209 SEARCH_COUNT) > 0) { 2210 disconnected = FALSE; 2211 } 2212 2213 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2214 struct scb *bus_scb; 2215 2216 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG)); 2217 if (bus_scb == pending_scb) 2218 disconnected = FALSE; 2219 else if (flag != SCB_ABORT 2220 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid 2221 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb)) 2222 disconnected = FALSE; 2223 } 2224 2225 /* 2226 * At this point, pending_scb is the scb associated with the 2227 * passed in command. That command is currently active on the 2228 * bus, is in the disconnected state, or we're hoping to find 2229 * a command for the same target active on the bus to abuse to 2230 * send a BDR. Queue the appropriate message based on which of 2231 * these states we are in. 2232 */ 2233 last_phase = ahc_inb(ahc, LASTPHASE); 2234 saved_scbptr = ahc_inb(ahc, SCBPTR); 2235 active_scb_index = ahc_inb(ahc, SCB_TAG); 2236 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); 2237 if (last_phase != P_BUSFREE 2238 && (pending_scb->hscb->tag == active_scb_index 2239 || (flag == SCB_DEVICE_RESET 2240 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) { 2241 2242 /* 2243 * We're active on the bus, so assert ATN 2244 * and hope that the target responds. 2245 */ 2246 pending_scb = ahc_lookup_scb(ahc, active_scb_index); 2247 pending_scb->flags |= SCB_RECOVERY_SCB|flag; 2248 ahc_outb(ahc, MSG_OUT, HOST_MSG); 2249 ahc_outb(ahc, SCSISIGO, last_phase|ATNO); 2250 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2251 wait = TRUE; 2252 } else if (disconnected) { 2253 2254 /* 2255 * Actually re-queue this SCB in an attempt 2256 * to select the device before it reconnects. 2257 * In either case (selection or reselection), 2258 * we will now issue the approprate message 2259 * to the timed-out device. 2260 * 2261 * Set the MK_MESSAGE control bit indicating 2262 * that we desire to send a message. We 2263 * also set the disconnected flag since 2264 * in the paging case there is no guarantee 2265 * that our SCB control byte matches the 2266 * version on the card. We don't want the 2267 * sequencer to abort the command thinking 2268 * an unsolicited reselection occurred. 2269 */ 2270 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2271 pending_scb->flags |= SCB_RECOVERY_SCB|flag; 2272 2273 /* 2274 * Remove any cached copy of this SCB in the 2275 * disconnected list in preparation for the 2276 * queuing of our abort SCB. We use the 2277 * same element in the SCB, SCB_NEXT, for 2278 * both the qinfifo and the disconnected list. 2279 */ 2280 ahc_search_disc_list(ahc, cmd->device->id, 2281 cmd->device->channel + 'A', 2282 cmd->device->lun, pending_scb->hscb->tag, 2283 /*stop_on_first*/TRUE, 2284 /*remove*/TRUE, 2285 /*save_state*/FALSE); 2286 2287 /* 2288 * In the non-paging case, the sequencer will 2289 * never re-reference the in-core SCB. 2290 * To make sure we are notified during 2291 * reselection, set the MK_MESSAGE flag in 2292 * the card's copy of the SCB. 2293 */ 2294 if ((ahc->flags & AHC_PAGESCBS) == 0) { 2295 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag); 2296 ahc_outb(ahc, SCB_CONTROL, 2297 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE); 2298 } 2299 2300 /* 2301 * Clear out any entries in the QINFIFO first 2302 * so we are the next SCB for this target 2303 * to run. 2304 */ 2305 ahc_search_qinfifo(ahc, cmd->device->id, 2306 cmd->device->channel + 'A', 2307 cmd->device->lun, SCB_LIST_NULL, 2308 ROLE_INITIATOR, CAM_REQUEUE_REQ, 2309 SEARCH_COMPLETE); 2310 ahc_qinfifo_requeue_tail(ahc, pending_scb); 2311 ahc_outb(ahc, SCBPTR, saved_scbptr); 2312 ahc_print_path(ahc, pending_scb); 2313 printk("Device is disconnected, re-queuing SCB\n"); 2314 wait = TRUE; 2315 } else { 2316 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2317 retval = FAILED; 2318 goto done; 2319 } 2320 2321 no_cmd: 2322 /* 2323 * Our assumption is that if we don't have the command, no 2324 * recovery action was required, so we return success. Again, 2325 * the semantics of the mid-layer recovery engine are not 2326 * well defined, so this may change in time. 2327 */ 2328 retval = SUCCESS; 2329 done: 2330 if (paused) 2331 ahc_unpause(ahc); 2332 if (wait) { 2333 DECLARE_COMPLETION_ONSTACK(done); 2334 2335 ahc->platform_data->eh_done = &done; 2336 ahc_unlock(ahc, &flags); 2337 2338 printk("Recovery code sleeping\n"); 2339 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2340 ahc_lock(ahc, &flags); 2341 ahc->platform_data->eh_done = NULL; 2342 ahc_unlock(ahc, &flags); 2343 2344 printk("Timer Expired\n"); 2345 retval = FAILED; 2346 } 2347 printk("Recovery code awake\n"); 2348 } else 2349 ahc_unlock(ahc, &flags); 2350 return (retval); 2351 } 2352 2353 void 2354 ahc_platform_dump_card_state(struct ahc_softc *ahc) 2355 { 2356 } 2357 2358 static void ahc_linux_set_width(struct scsi_target *starget, int width) 2359 { 2360 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2361 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2362 struct ahc_devinfo devinfo; 2363 unsigned long flags; 2364 2365 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2366 starget->channel + 'A', ROLE_INITIATOR); 2367 ahc_lock(ahc, &flags); 2368 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE); 2369 ahc_unlock(ahc, &flags); 2370 } 2371 2372 static void ahc_linux_set_period(struct scsi_target *starget, int period) 2373 { 2374 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2375 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2376 struct ahc_tmode_tstate *tstate; 2377 struct ahc_initiator_tinfo *tinfo 2378 = ahc_fetch_transinfo(ahc, 2379 starget->channel + 'A', 2380 shost->this_id, starget->id, &tstate); 2381 struct ahc_devinfo devinfo; 2382 unsigned int ppr_options = tinfo->goal.ppr_options; 2383 unsigned long flags; 2384 unsigned long offset = tinfo->goal.offset; 2385 const struct ahc_syncrate *syncrate; 2386 2387 if (offset == 0) 2388 offset = MAX_OFFSET; 2389 2390 if (period < 9) 2391 period = 9; /* 12.5ns is our minimum */ 2392 if (period == 9) { 2393 if (spi_max_width(starget)) 2394 ppr_options |= MSG_EXT_PPR_DT_REQ; 2395 else 2396 /* need wide for DT and need DT for 12.5 ns */ 2397 period = 10; 2398 } 2399 2400 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2401 starget->channel + 'A', ROLE_INITIATOR); 2402 2403 /* all PPR requests apart from QAS require wide transfers */ 2404 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2405 if (spi_width(starget) == 0) 2406 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2407 } 2408 2409 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2410 ahc_lock(ahc, &flags); 2411 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2412 ppr_options, AHC_TRANS_GOAL, FALSE); 2413 ahc_unlock(ahc, &flags); 2414 } 2415 2416 static void ahc_linux_set_offset(struct scsi_target *starget, int offset) 2417 { 2418 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2419 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2420 struct ahc_tmode_tstate *tstate; 2421 struct ahc_initiator_tinfo *tinfo 2422 = ahc_fetch_transinfo(ahc, 2423 starget->channel + 'A', 2424 shost->this_id, starget->id, &tstate); 2425 struct ahc_devinfo devinfo; 2426 unsigned int ppr_options = 0; 2427 unsigned int period = 0; 2428 unsigned long flags; 2429 const struct ahc_syncrate *syncrate = NULL; 2430 2431 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2432 starget->channel + 'A', ROLE_INITIATOR); 2433 if (offset != 0) { 2434 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2435 period = tinfo->goal.period; 2436 ppr_options = tinfo->goal.ppr_options; 2437 } 2438 ahc_lock(ahc, &flags); 2439 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2440 ppr_options, AHC_TRANS_GOAL, FALSE); 2441 ahc_unlock(ahc, &flags); 2442 } 2443 2444 static void ahc_linux_set_dt(struct scsi_target *starget, int dt) 2445 { 2446 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2447 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2448 struct ahc_tmode_tstate *tstate; 2449 struct ahc_initiator_tinfo *tinfo 2450 = ahc_fetch_transinfo(ahc, 2451 starget->channel + 'A', 2452 shost->this_id, starget->id, &tstate); 2453 struct ahc_devinfo devinfo; 2454 unsigned int ppr_options = tinfo->goal.ppr_options 2455 & ~MSG_EXT_PPR_DT_REQ; 2456 unsigned int period = tinfo->goal.period; 2457 unsigned int width = tinfo->goal.width; 2458 unsigned long flags; 2459 const struct ahc_syncrate *syncrate; 2460 2461 if (dt && spi_max_width(starget)) { 2462 ppr_options |= MSG_EXT_PPR_DT_REQ; 2463 if (!width) 2464 ahc_linux_set_width(starget, 1); 2465 } else if (period == 9) 2466 period = 10; /* if resetting DT, period must be >= 25ns */ 2467 2468 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2469 starget->channel + 'A', ROLE_INITIATOR); 2470 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT); 2471 ahc_lock(ahc, &flags); 2472 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2473 ppr_options, AHC_TRANS_GOAL, FALSE); 2474 ahc_unlock(ahc, &flags); 2475 } 2476 2477 #if 0 2478 /* FIXME: This code claims to support IU and QAS. However, the actual 2479 * sequencer code and aic7xxx_core have no support for these parameters and 2480 * will get into a bad state if they're negotiated. Do not enable this 2481 * unless you know what you're doing */ 2482 static void ahc_linux_set_qas(struct scsi_target *starget, int qas) 2483 { 2484 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2485 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2486 struct ahc_tmode_tstate *tstate; 2487 struct ahc_initiator_tinfo *tinfo 2488 = ahc_fetch_transinfo(ahc, 2489 starget->channel + 'A', 2490 shost->this_id, starget->id, &tstate); 2491 struct ahc_devinfo devinfo; 2492 unsigned int ppr_options = tinfo->goal.ppr_options 2493 & ~MSG_EXT_PPR_QAS_REQ; 2494 unsigned int period = tinfo->goal.period; 2495 unsigned long flags; 2496 struct ahc_syncrate *syncrate; 2497 2498 if (qas) 2499 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2500 2501 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2502 starget->channel + 'A', ROLE_INITIATOR); 2503 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2504 ahc_lock(ahc, &flags); 2505 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2506 ppr_options, AHC_TRANS_GOAL, FALSE); 2507 ahc_unlock(ahc, &flags); 2508 } 2509 2510 static void ahc_linux_set_iu(struct scsi_target *starget, int iu) 2511 { 2512 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2513 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2514 struct ahc_tmode_tstate *tstate; 2515 struct ahc_initiator_tinfo *tinfo 2516 = ahc_fetch_transinfo(ahc, 2517 starget->channel + 'A', 2518 shost->this_id, starget->id, &tstate); 2519 struct ahc_devinfo devinfo; 2520 unsigned int ppr_options = tinfo->goal.ppr_options 2521 & ~MSG_EXT_PPR_IU_REQ; 2522 unsigned int period = tinfo->goal.period; 2523 unsigned long flags; 2524 struct ahc_syncrate *syncrate; 2525 2526 if (iu) 2527 ppr_options |= MSG_EXT_PPR_IU_REQ; 2528 2529 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2530 starget->channel + 'A', ROLE_INITIATOR); 2531 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2532 ahc_lock(ahc, &flags); 2533 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2534 ppr_options, AHC_TRANS_GOAL, FALSE); 2535 ahc_unlock(ahc, &flags); 2536 } 2537 #endif 2538 2539 static void ahc_linux_get_signalling(struct Scsi_Host *shost) 2540 { 2541 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata; 2542 unsigned long flags; 2543 u8 mode; 2544 2545 if (!(ahc->features & AHC_ULTRA2)) { 2546 /* non-LVD chipset, may not have SBLKCTL reg */ 2547 spi_signalling(shost) = 2548 ahc->features & AHC_HVD ? 2549 SPI_SIGNAL_HVD : 2550 SPI_SIGNAL_SE; 2551 return; 2552 } 2553 2554 ahc_lock(ahc, &flags); 2555 ahc_pause(ahc); 2556 mode = ahc_inb(ahc, SBLKCTL); 2557 ahc_unpause(ahc); 2558 ahc_unlock(ahc, &flags); 2559 2560 if (mode & ENAB40) 2561 spi_signalling(shost) = SPI_SIGNAL_LVD; 2562 else if (mode & ENAB20) 2563 spi_signalling(shost) = SPI_SIGNAL_SE; 2564 else 2565 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2566 } 2567 2568 static struct spi_function_template ahc_linux_transport_functions = { 2569 .set_offset = ahc_linux_set_offset, 2570 .show_offset = 1, 2571 .set_period = ahc_linux_set_period, 2572 .show_period = 1, 2573 .set_width = ahc_linux_set_width, 2574 .show_width = 1, 2575 .set_dt = ahc_linux_set_dt, 2576 .show_dt = 1, 2577 #if 0 2578 .set_iu = ahc_linux_set_iu, 2579 .show_iu = 1, 2580 .set_qas = ahc_linux_set_qas, 2581 .show_qas = 1, 2582 #endif 2583 .get_signalling = ahc_linux_get_signalling, 2584 }; 2585 2586 2587 2588 static int __init 2589 ahc_linux_init(void) 2590 { 2591 /* 2592 * If we've been passed any parameters, process them now. 2593 */ 2594 if (aic7xxx) 2595 aic7xxx_setup(aic7xxx); 2596 2597 ahc_linux_transport_template = 2598 spi_attach_transport(&ahc_linux_transport_functions); 2599 if (!ahc_linux_transport_template) 2600 return -ENODEV; 2601 2602 scsi_transport_reserve_device(ahc_linux_transport_template, 2603 sizeof(struct ahc_linux_device)); 2604 2605 ahc_linux_pci_init(); 2606 ahc_linux_eisa_init(); 2607 return 0; 2608 } 2609 2610 static void 2611 ahc_linux_exit(void) 2612 { 2613 ahc_linux_pci_exit(); 2614 ahc_linux_eisa_exit(); 2615 spi_release_transport(ahc_linux_transport_template); 2616 } 2617 2618 module_init(ahc_linux_init); 2619 module_exit(ahc_linux_exit); 2620