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 */ 132 133 134 /* 135 * Set this to the delay in seconds after SCSI bus reset. 136 * Note, we honor this only for the initial bus reset. 137 * The scsi error recovery code performs its own bus settle 138 * delay handling for error recovery actions. 139 */ 140 #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS 141 #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS 142 #else 143 #define AIC7XXX_RESET_DELAY 5000 144 #endif 145 146 /* 147 * Control collection of SCSI transfer statistics for the /proc filesystem. 148 * 149 * NOTE: Do NOT enable this when running on kernels version 1.2.x and below. 150 * NOTE: This does affect performance since it has to maintain statistics. 151 */ 152 #ifdef CONFIG_AIC7XXX_PROC_STATS 153 #define AIC7XXX_PROC_STATS 154 #endif 155 156 /* 157 * To change the default number of tagged transactions allowed per-device, 158 * add a line to the lilo.conf file like: 159 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" 160 * which will result in the first four devices on the first two 161 * controllers being set to a tagged queue depth of 32. 162 * 163 * The tag_commands is an array of 16 to allow for wide and twin adapters. 164 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 165 * for channel 1. 166 */ 167 typedef struct { 168 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */ 169 } adapter_tag_info_t; 170 171 /* 172 * Modify this as you see fit for your system. 173 * 174 * 0 tagged queuing disabled 175 * 1 <= n <= 253 n == max tags ever dispatched. 176 * 177 * The driver will throttle the number of commands dispatched to a 178 * device if it returns queue full. For devices with a fixed maximum 179 * queue depth, the driver will eventually determine this depth and 180 * lock it in (a console message is printed to indicate that a lock 181 * has occurred). On some devices, queue full is returned for a temporary 182 * resource shortage. These devices will return queue full at varying 183 * depths. The driver will throttle back when the queue fulls occur and 184 * attempt to slowly increase the depth over time as the device recovers 185 * from the resource shortage. 186 * 187 * In this example, the first line will disable tagged queueing for all 188 * the devices on the first probed aic7xxx adapter. 189 * 190 * The second line enables tagged queueing with 4 commands/LUN for IDs 191 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the 192 * driver to attempt to use up to 64 tags for ID 1. 193 * 194 * The third line is the same as the first line. 195 * 196 * The fourth line disables tagged queueing for devices 0 and 3. It 197 * enables tagged queueing for the other IDs, with 16 commands/LUN 198 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for 199 * IDs 2, 5-7, and 9-15. 200 */ 201 202 /* 203 * NOTE: The below structure is for reference only, the actual structure 204 * to modify in order to change things is just below this comment block. 205 adapter_tag_info_t aic7xxx_tag_info[] = 206 { 207 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 208 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, 209 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 210 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} 211 }; 212 */ 213 214 #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE 215 #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE 216 #else 217 #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE 218 #endif 219 220 #define AIC7XXX_CONFIGED_TAG_COMMANDS { \ 221 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 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 } 230 231 /* 232 * By default, use the number of commands specified by 233 * the users kernel configuration. 234 */ 235 static adapter_tag_info_t aic7xxx_tag_info[] = 236 { 237 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 238 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 239 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 240 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 241 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 242 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 243 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 244 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 245 {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 }; 254 255 /* 256 * There should be a specific return value for this in scsi.h, but 257 * it seems that most drivers ignore it. 258 */ 259 #define DID_UNDERFLOW DID_ERROR 260 261 void 262 ahc_print_path(struct ahc_softc *ahc, struct scb *scb) 263 { 264 printk("(scsi%d:%c:%d:%d): ", 265 ahc->platform_data->host->host_no, 266 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X', 267 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1, 268 scb != NULL ? SCB_GET_LUN(scb) : -1); 269 } 270 271 /* 272 * XXX - these options apply unilaterally to _all_ 274x/284x/294x 273 * cards in the system. This should be fixed. Exceptions to this 274 * rule are noted in the comments. 275 */ 276 277 /* 278 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This 279 * has no effect on any later resets that might occur due to things like 280 * SCSI bus timeouts. 281 */ 282 static uint32_t aic7xxx_no_reset; 283 284 /* 285 * Should we force EXTENDED translation on a controller. 286 * 0 == Use whatever is in the SEEPROM or default to off 287 * 1 == Use whatever is in the SEEPROM or default to on 288 */ 289 static uint32_t aic7xxx_extended; 290 291 /* 292 * PCI bus parity checking of the Adaptec controllers. This is somewhat 293 * dubious at best. To my knowledge, this option has never actually 294 * solved a PCI parity problem, but on certain machines with broken PCI 295 * chipset configurations where stray PCI transactions with bad parity are 296 * the norm rather than the exception, the error messages can be overwelming. 297 * It's included in the driver for completeness. 298 * 0 = Shut off PCI parity check 299 * non-0 = reverse polarity pci parity checking 300 */ 301 static uint32_t aic7xxx_pci_parity = ~0; 302 303 /* 304 * There are lots of broken chipsets in the world. Some of them will 305 * violate the PCI spec when we issue byte sized memory writes to our 306 * controller. I/O mapped register access, if allowed by the given 307 * platform, will work in almost all cases. 308 */ 309 uint32_t aic7xxx_allow_memio = ~0; 310 311 /* 312 * So that we can set how long each device is given as a selection timeout. 313 * The table of values goes like this: 314 * 0 - 256ms 315 * 1 - 128ms 316 * 2 - 64ms 317 * 3 - 32ms 318 * We default to 256ms because some older devices need a longer time 319 * to respond to initial selection. 320 */ 321 static uint32_t aic7xxx_seltime; 322 323 /* 324 * Certain devices do not perform any aging on commands. Should the 325 * device be saturated by commands in one portion of the disk, it is 326 * possible for transactions on far away sectors to never be serviced. 327 * To handle these devices, we can periodically send an ordered tag to 328 * force all outstanding transactions to be serviced prior to a new 329 * transaction. 330 */ 331 static uint32_t aic7xxx_periodic_otag; 332 333 /* 334 * Module information and settable options. 335 */ 336 static char *aic7xxx = NULL; 337 338 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>"); 339 MODULE_DESCRIPTION("Adaptec AIC77XX/78XX SCSI Host Bus Adapter driver"); 340 MODULE_LICENSE("Dual BSD/GPL"); 341 MODULE_VERSION(AIC7XXX_DRIVER_VERSION); 342 module_param(aic7xxx, charp, 0444); 343 MODULE_PARM_DESC(aic7xxx, 344 "period-delimited options string:\n" 345 " verbose Enable verbose/diagnostic logging\n" 346 " allow_memio Allow device registers to be memory mapped\n" 347 " debug Bitmask of debug values to enable\n" 348 " no_probe Toggle EISA/VLB controller probing\n" 349 " probe_eisa_vl Toggle EISA/VLB controller probing\n" 350 " no_reset Suppress initial bus resets\n" 351 " extended Enable extended geometry on all controllers\n" 352 " periodic_otag Send an ordered tagged transaction\n" 353 " periodically to prevent tag starvation.\n" 354 " This may be required by some older disk\n" 355 " drives or RAID arrays.\n" 356 " tag_info:<tag_str> Set per-target tag depth\n" 357 " global_tag_depth:<int> Global tag depth for every target\n" 358 " on every bus\n" 359 " seltime:<int> Selection Timeout\n" 360 " (0/256ms,1/128ms,2/64ms,3/32ms)\n" 361 "\n" 362 " Sample /etc/modprobe.conf line:\n" 363 " Toggle EISA/VLB probing\n" 364 " Set tag depth on Controller 1/Target 1 to 10 tags\n" 365 " Shorten the selection timeout to 128ms\n" 366 "\n" 367 " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n" 368 ); 369 370 static void ahc_linux_handle_scsi_status(struct ahc_softc *, 371 struct scsi_device *, 372 struct scb *); 373 static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, 374 struct scsi_cmnd *cmd); 375 static void ahc_linux_freeze_simq(struct ahc_softc *ahc); 376 static void ahc_linux_release_simq(struct ahc_softc *ahc); 377 static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag); 378 static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc); 379 static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc, 380 struct ahc_devinfo *devinfo); 381 static void ahc_linux_device_queue_depth(struct scsi_device *); 382 static int ahc_linux_run_command(struct ahc_softc*, 383 struct ahc_linux_device *, 384 struct scsi_cmnd *); 385 static void ahc_linux_setup_tag_info_global(char *p); 386 static int aic7xxx_setup(char *s); 387 388 static int ahc_linux_unit; 389 390 391 /************************** OS Utility Wrappers *******************************/ 392 void 393 ahc_delay(long usec) 394 { 395 /* 396 * udelay on Linux can have problems for 397 * multi-millisecond waits. Wait at most 398 * 1024us per call. 399 */ 400 while (usec > 0) { 401 udelay(usec % 1024); 402 usec -= 1024; 403 } 404 } 405 406 /***************************** Low Level I/O **********************************/ 407 uint8_t 408 ahc_inb(struct ahc_softc * ahc, long port) 409 { 410 uint8_t x; 411 412 if (ahc->tag == BUS_SPACE_MEMIO) { 413 x = readb(ahc->bsh.maddr + port); 414 } else { 415 x = inb(ahc->bsh.ioport + port); 416 } 417 mb(); 418 return (x); 419 } 420 421 void 422 ahc_outb(struct ahc_softc * ahc, long port, uint8_t val) 423 { 424 if (ahc->tag == BUS_SPACE_MEMIO) { 425 writeb(val, ahc->bsh.maddr + port); 426 } else { 427 outb(val, ahc->bsh.ioport + port); 428 } 429 mb(); 430 } 431 432 void 433 ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count) 434 { 435 int i; 436 437 /* 438 * There is probably a more efficient way to do this on Linux 439 * but we don't use this for anything speed critical and this 440 * should work. 441 */ 442 for (i = 0; i < count; i++) 443 ahc_outb(ahc, port, *array++); 444 } 445 446 void 447 ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count) 448 { 449 int i; 450 451 /* 452 * There is probably a more efficient way to do this on Linux 453 * but we don't use this for anything speed critical and this 454 * should work. 455 */ 456 for (i = 0; i < count; i++) 457 *array++ = ahc_inb(ahc, port); 458 } 459 460 /********************************* Inlines ************************************/ 461 static void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*); 462 463 static int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, 464 struct ahc_dma_seg *sg, 465 dma_addr_t addr, bus_size_t len); 466 467 static void 468 ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb) 469 { 470 struct scsi_cmnd *cmd; 471 472 cmd = scb->io_ctx; 473 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE); 474 475 scsi_dma_unmap(cmd); 476 } 477 478 static int 479 ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, 480 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len) 481 { 482 int consumed; 483 484 if ((scb->sg_count + 1) > AHC_NSEG) 485 panic("Too few segs for dma mapping. " 486 "Increase AHC_NSEG\n"); 487 488 consumed = 1; 489 sg->addr = ahc_htole32(addr & 0xFFFFFFFF); 490 scb->platform_data->xfer_len += len; 491 492 if (sizeof(dma_addr_t) > 4 493 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0) 494 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK; 495 496 sg->len = ahc_htole32(len); 497 return (consumed); 498 } 499 500 /* 501 * Return a string describing the driver. 502 */ 503 static const char * 504 ahc_linux_info(struct Scsi_Host *host) 505 { 506 static char buffer[512]; 507 char ahc_info[256]; 508 char *bp; 509 struct ahc_softc *ahc; 510 511 bp = &buffer[0]; 512 ahc = *(struct ahc_softc **)host->hostdata; 513 memset(bp, 0, sizeof(buffer)); 514 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev " AIC7XXX_DRIVER_VERSION "\n" 515 " <"); 516 strcat(bp, ahc->description); 517 strcat(bp, ">\n" 518 " "); 519 ahc_controller_info(ahc, ahc_info); 520 strcat(bp, ahc_info); 521 strcat(bp, "\n"); 522 523 return (bp); 524 } 525 526 /* 527 * Queue an SCB to the controller. 528 */ 529 static int 530 ahc_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *)) 531 { 532 struct ahc_softc *ahc; 533 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device); 534 int rtn = SCSI_MLQUEUE_HOST_BUSY; 535 unsigned long flags; 536 537 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 538 539 ahc_lock(ahc, &flags); 540 if (ahc->platform_data->qfrozen == 0) { 541 cmd->scsi_done = scsi_done; 542 cmd->result = CAM_REQ_INPROG << 16; 543 rtn = ahc_linux_run_command(ahc, dev, cmd); 544 } 545 ahc_unlock(ahc, &flags); 546 547 return rtn; 548 } 549 550 static inline struct scsi_target ** 551 ahc_linux_target_in_softc(struct scsi_target *starget) 552 { 553 struct ahc_softc *ahc = 554 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); 555 unsigned int target_offset; 556 557 target_offset = starget->id; 558 if (starget->channel != 0) 559 target_offset += 8; 560 561 return &ahc->platform_data->starget[target_offset]; 562 } 563 564 static int 565 ahc_linux_target_alloc(struct scsi_target *starget) 566 { 567 struct ahc_softc *ahc = 568 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); 569 struct seeprom_config *sc = ahc->seep_config; 570 unsigned long flags; 571 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); 572 unsigned short scsirate; 573 struct ahc_devinfo devinfo; 574 struct ahc_initiator_tinfo *tinfo; 575 struct ahc_tmode_tstate *tstate; 576 char channel = starget->channel + 'A'; 577 unsigned int our_id = ahc->our_id; 578 unsigned int target_offset; 579 580 target_offset = starget->id; 581 if (starget->channel != 0) 582 target_offset += 8; 583 584 if (starget->channel) 585 our_id = ahc->our_id_b; 586 587 ahc_lock(ahc, &flags); 588 589 BUG_ON(*ahc_targp != NULL); 590 591 *ahc_targp = starget; 592 593 if (sc) { 594 int maxsync = AHC_SYNCRATE_DT; 595 int ultra = 0; 596 int flags = sc->device_flags[target_offset]; 597 598 if (ahc->flags & AHC_NEWEEPROM_FMT) { 599 if (flags & CFSYNCHISULTRA) 600 ultra = 1; 601 } else if (flags & CFULTRAEN) 602 ultra = 1; 603 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04 604 * change it to ultra=0, CFXFER = 0 */ 605 if(ultra && (flags & CFXFER) == 0x04) { 606 ultra = 0; 607 flags &= ~CFXFER; 608 } 609 610 if ((ahc->features & AHC_ULTRA2) != 0) { 611 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0); 612 } else { 613 scsirate = (flags & CFXFER) << 4; 614 maxsync = ultra ? AHC_SYNCRATE_ULTRA : 615 AHC_SYNCRATE_FAST; 616 } 617 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; 618 if (!(flags & CFSYNCH)) 619 spi_max_offset(starget) = 0; 620 spi_min_period(starget) = 621 ahc_find_period(ahc, scsirate, maxsync); 622 623 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id, 624 starget->id, &tstate); 625 } 626 ahc_compile_devinfo(&devinfo, our_id, starget->id, 627 CAM_LUN_WILDCARD, channel, 628 ROLE_INITIATOR); 629 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0, 630 AHC_TRANS_GOAL, /*paused*/FALSE); 631 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 632 AHC_TRANS_GOAL, /*paused*/FALSE); 633 ahc_unlock(ahc, &flags); 634 635 return 0; 636 } 637 638 static void 639 ahc_linux_target_destroy(struct scsi_target *starget) 640 { 641 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); 642 643 *ahc_targp = NULL; 644 } 645 646 static int 647 ahc_linux_slave_alloc(struct scsi_device *sdev) 648 { 649 struct ahc_softc *ahc = 650 *((struct ahc_softc **)sdev->host->hostdata); 651 struct scsi_target *starget = sdev->sdev_target; 652 struct ahc_linux_device *dev; 653 654 if (bootverbose) 655 printf("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id); 656 657 dev = scsi_transport_device_data(sdev); 658 memset(dev, 0, sizeof(*dev)); 659 660 /* 661 * We start out life using untagged 662 * transactions of which we allow one. 663 */ 664 dev->openings = 1; 665 666 /* 667 * Set maxtags to 0. This will be changed if we 668 * later determine that we are dealing with 669 * a tagged queuing capable device. 670 */ 671 dev->maxtags = 0; 672 673 spi_period(starget) = 0; 674 675 return 0; 676 } 677 678 static int 679 ahc_linux_slave_configure(struct scsi_device *sdev) 680 { 681 struct ahc_softc *ahc; 682 683 ahc = *((struct ahc_softc **)sdev->host->hostdata); 684 685 if (bootverbose) 686 sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); 687 688 ahc_linux_device_queue_depth(sdev); 689 690 /* Initial Domain Validation */ 691 if (!spi_initial_dv(sdev->sdev_target)) 692 spi_dv_device(sdev); 693 694 return 0; 695 } 696 697 #if defined(__i386__) 698 /* 699 * Return the disk geometry for the given SCSI device. 700 */ 701 static int 702 ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 703 sector_t capacity, int geom[]) 704 { 705 uint8_t *bh; 706 int heads; 707 int sectors; 708 int cylinders; 709 int ret; 710 int extended; 711 struct ahc_softc *ahc; 712 u_int channel; 713 714 ahc = *((struct ahc_softc **)sdev->host->hostdata); 715 channel = sdev_channel(sdev); 716 717 bh = scsi_bios_ptable(bdev); 718 if (bh) { 719 ret = scsi_partsize(bh, capacity, 720 &geom[2], &geom[0], &geom[1]); 721 kfree(bh); 722 if (ret != -1) 723 return (ret); 724 } 725 heads = 64; 726 sectors = 32; 727 cylinders = aic_sector_div(capacity, heads, sectors); 728 729 if (aic7xxx_extended != 0) 730 extended = 1; 731 else if (channel == 0) 732 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0; 733 else 734 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0; 735 if (extended && cylinders >= 1024) { 736 heads = 255; 737 sectors = 63; 738 cylinders = aic_sector_div(capacity, heads, sectors); 739 } 740 geom[0] = heads; 741 geom[1] = sectors; 742 geom[2] = cylinders; 743 return (0); 744 } 745 #endif 746 747 /* 748 * Abort the current SCSI command(s). 749 */ 750 static int 751 ahc_linux_abort(struct scsi_cmnd *cmd) 752 { 753 int error; 754 755 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT); 756 if (error != 0) 757 printf("aic7xxx_abort returns 0x%x\n", error); 758 return (error); 759 } 760 761 /* 762 * Attempt to send a target reset message to the device that timed out. 763 */ 764 static int 765 ahc_linux_dev_reset(struct scsi_cmnd *cmd) 766 { 767 int error; 768 769 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET); 770 if (error != 0) 771 printf("aic7xxx_dev_reset returns 0x%x\n", error); 772 return (error); 773 } 774 775 /* 776 * Reset the SCSI bus. 777 */ 778 static int 779 ahc_linux_bus_reset(struct scsi_cmnd *cmd) 780 { 781 struct ahc_softc *ahc; 782 int found; 783 unsigned long flags; 784 785 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 786 787 ahc_lock(ahc, &flags); 788 found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A', 789 /*initiate reset*/TRUE); 790 ahc_unlock(ahc, &flags); 791 792 if (bootverbose) 793 printf("%s: SCSI bus reset delivered. " 794 "%d SCBs aborted.\n", ahc_name(ahc), found); 795 796 return SUCCESS; 797 } 798 799 struct scsi_host_template aic7xxx_driver_template = { 800 .module = THIS_MODULE, 801 .name = "aic7xxx", 802 .proc_name = "aic7xxx", 803 .proc_info = ahc_linux_proc_info, 804 .info = ahc_linux_info, 805 .queuecommand = ahc_linux_queue, 806 .eh_abort_handler = ahc_linux_abort, 807 .eh_device_reset_handler = ahc_linux_dev_reset, 808 .eh_bus_reset_handler = ahc_linux_bus_reset, 809 #if defined(__i386__) 810 .bios_param = ahc_linux_biosparam, 811 #endif 812 .can_queue = AHC_MAX_QUEUE, 813 .this_id = -1, 814 .max_sectors = 8192, 815 .cmd_per_lun = 2, 816 .use_clustering = ENABLE_CLUSTERING, 817 .slave_alloc = ahc_linux_slave_alloc, 818 .slave_configure = ahc_linux_slave_configure, 819 .target_alloc = ahc_linux_target_alloc, 820 .target_destroy = ahc_linux_target_destroy, 821 }; 822 823 /**************************** Tasklet Handler *********************************/ 824 825 /******************************** Macros **************************************/ 826 #define BUILD_SCSIID(ahc, cmd) \ 827 ((((cmd)->device->id << TID_SHIFT) & TID) \ 828 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \ 829 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB)) 830 831 /******************************** Bus DMA *************************************/ 832 int 833 ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent, 834 bus_size_t alignment, bus_size_t boundary, 835 dma_addr_t lowaddr, dma_addr_t highaddr, 836 bus_dma_filter_t *filter, void *filterarg, 837 bus_size_t maxsize, int nsegments, 838 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 839 { 840 bus_dma_tag_t dmat; 841 842 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT); 843 if (dmat == NULL) 844 return (ENOMEM); 845 846 /* 847 * Linux is very simplistic about DMA memory. For now don't 848 * maintain all specification information. Once Linux supplies 849 * better facilities for doing these operations, or the 850 * needs of this particular driver change, we might need to do 851 * more here. 852 */ 853 dmat->alignment = alignment; 854 dmat->boundary = boundary; 855 dmat->maxsize = maxsize; 856 *ret_tag = dmat; 857 return (0); 858 } 859 860 void 861 ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat) 862 { 863 free(dmat, M_DEVBUF); 864 } 865 866 int 867 ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr, 868 int flags, bus_dmamap_t *mapp) 869 { 870 *vaddr = pci_alloc_consistent(ahc->dev_softc, 871 dmat->maxsize, mapp); 872 if (*vaddr == NULL) 873 return ENOMEM; 874 return 0; 875 } 876 877 void 878 ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat, 879 void* vaddr, bus_dmamap_t map) 880 { 881 pci_free_consistent(ahc->dev_softc, dmat->maxsize, 882 vaddr, map); 883 } 884 885 int 886 ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map, 887 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 888 void *cb_arg, int flags) 889 { 890 /* 891 * Assume for now that this will only be used during 892 * initialization and not for per-transaction buffer mapping. 893 */ 894 bus_dma_segment_t stack_sg; 895 896 stack_sg.ds_addr = map; 897 stack_sg.ds_len = dmat->maxsize; 898 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 899 return (0); 900 } 901 902 void 903 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 904 { 905 } 906 907 int 908 ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 909 { 910 /* Nothing to do */ 911 return (0); 912 } 913 914 static void 915 ahc_linux_setup_tag_info_global(char *p) 916 { 917 int tags, i, j; 918 919 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 920 printf("Setting Global Tags= %d\n", tags); 921 922 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) { 923 for (j = 0; j < AHC_NUM_TARGETS; j++) { 924 aic7xxx_tag_info[i].tag_commands[j] = tags; 925 } 926 } 927 } 928 929 static void 930 ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 931 { 932 933 if ((instance >= 0) && (targ >= 0) 934 && (instance < ARRAY_SIZE(aic7xxx_tag_info)) 935 && (targ < AHC_NUM_TARGETS)) { 936 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff; 937 if (bootverbose) 938 printf("tag_info[%d:%d] = %d\n", instance, targ, value); 939 } 940 } 941 942 static char * 943 ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 944 void (*callback)(u_long, int, int, int32_t), 945 u_long callback_arg) 946 { 947 char *tok_end; 948 char *tok_end2; 949 int i; 950 int instance; 951 int targ; 952 int done; 953 char tok_list[] = {'.', ',', '{', '}', '\0'}; 954 955 /* All options use a ':' name/arg separator */ 956 if (*opt_arg != ':') 957 return (opt_arg); 958 opt_arg++; 959 instance = -1; 960 targ = -1; 961 done = FALSE; 962 /* 963 * Restore separator that may be in 964 * the middle of our option argument. 965 */ 966 tok_end = strchr(opt_arg, '\0'); 967 if (tok_end < end) 968 *tok_end = ','; 969 while (!done) { 970 switch (*opt_arg) { 971 case '{': 972 if (instance == -1) { 973 instance = 0; 974 } else { 975 if (depth > 1) { 976 if (targ == -1) 977 targ = 0; 978 } else { 979 printf("Malformed Option %s\n", 980 opt_name); 981 done = TRUE; 982 } 983 } 984 opt_arg++; 985 break; 986 case '}': 987 if (targ != -1) 988 targ = -1; 989 else if (instance != -1) 990 instance = -1; 991 opt_arg++; 992 break; 993 case ',': 994 case '.': 995 if (instance == -1) 996 done = TRUE; 997 else if (targ >= 0) 998 targ++; 999 else if (instance >= 0) 1000 instance++; 1001 opt_arg++; 1002 break; 1003 case '\0': 1004 done = TRUE; 1005 break; 1006 default: 1007 tok_end = end; 1008 for (i = 0; tok_list[i]; i++) { 1009 tok_end2 = strchr(opt_arg, tok_list[i]); 1010 if ((tok_end2) && (tok_end2 < tok_end)) 1011 tok_end = tok_end2; 1012 } 1013 callback(callback_arg, instance, targ, 1014 simple_strtol(opt_arg, NULL, 0)); 1015 opt_arg = tok_end; 1016 break; 1017 } 1018 } 1019 return (opt_arg); 1020 } 1021 1022 /* 1023 * Handle Linux boot parameters. This routine allows for assigning a value 1024 * to a parameter with a ':' between the parameter and the value. 1025 * ie. aic7xxx=stpwlev:1,extended 1026 */ 1027 static int 1028 aic7xxx_setup(char *s) 1029 { 1030 int i, n; 1031 char *p; 1032 char *end; 1033 1034 static const struct { 1035 const char *name; 1036 uint32_t *flag; 1037 } options[] = { 1038 { "extended", &aic7xxx_extended }, 1039 { "no_reset", &aic7xxx_no_reset }, 1040 { "verbose", &aic7xxx_verbose }, 1041 { "allow_memio", &aic7xxx_allow_memio}, 1042 #ifdef AHC_DEBUG 1043 { "debug", &ahc_debug }, 1044 #endif 1045 { "periodic_otag", &aic7xxx_periodic_otag }, 1046 { "pci_parity", &aic7xxx_pci_parity }, 1047 { "seltime", &aic7xxx_seltime }, 1048 { "tag_info", NULL }, 1049 { "global_tag_depth", NULL }, 1050 { "dv", NULL } 1051 }; 1052 1053 end = strchr(s, '\0'); 1054 1055 /* 1056 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE 1057 * will never be 0 in this case. 1058 */ 1059 n = 0; 1060 1061 while ((p = strsep(&s, ",.")) != NULL) { 1062 if (*p == '\0') 1063 continue; 1064 for (i = 0; i < ARRAY_SIZE(options); i++) { 1065 1066 n = strlen(options[i].name); 1067 if (strncmp(options[i].name, p, n) == 0) 1068 break; 1069 } 1070 if (i == ARRAY_SIZE(options)) 1071 continue; 1072 1073 if (strncmp(p, "global_tag_depth", n) == 0) { 1074 ahc_linux_setup_tag_info_global(p + n); 1075 } else if (strncmp(p, "tag_info", n) == 0) { 1076 s = ahc_parse_brace_option("tag_info", p + n, end, 1077 2, ahc_linux_setup_tag_info, 0); 1078 } else if (p[n] == ':') { 1079 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1080 } else if (strncmp(p, "verbose", n) == 0) { 1081 *(options[i].flag) = 1; 1082 } else { 1083 *(options[i].flag) ^= 0xFFFFFFFF; 1084 } 1085 } 1086 return 1; 1087 } 1088 1089 __setup("aic7xxx=", aic7xxx_setup); 1090 1091 uint32_t aic7xxx_verbose; 1092 1093 int 1094 ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template) 1095 { 1096 char buf[80]; 1097 struct Scsi_Host *host; 1098 char *new_name; 1099 u_long s; 1100 int retval; 1101 1102 template->name = ahc->description; 1103 host = scsi_host_alloc(template, sizeof(struct ahc_softc *)); 1104 if (host == NULL) 1105 return (ENOMEM); 1106 1107 *((struct ahc_softc **)host->hostdata) = ahc; 1108 ahc->platform_data->host = host; 1109 host->can_queue = AHC_MAX_QUEUE; 1110 host->cmd_per_lun = 2; 1111 /* XXX No way to communicate the ID for multiple channels */ 1112 host->this_id = ahc->our_id; 1113 host->irq = ahc->platform_data->irq; 1114 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8; 1115 host->max_lun = AHC_NUM_LUNS; 1116 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0; 1117 host->sg_tablesize = AHC_NSEG; 1118 ahc_lock(ahc, &s); 1119 ahc_set_unit(ahc, ahc_linux_unit++); 1120 ahc_unlock(ahc, &s); 1121 sprintf(buf, "scsi%d", host->host_no); 1122 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); 1123 if (new_name != NULL) { 1124 strcpy(new_name, buf); 1125 ahc_set_name(ahc, new_name); 1126 } 1127 host->unique_id = ahc->unit; 1128 ahc_linux_initialize_scsi_bus(ahc); 1129 ahc_intr_enable(ahc, TRUE); 1130 1131 host->transportt = ahc_linux_transport_template; 1132 1133 retval = scsi_add_host(host, 1134 (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); 1135 if (retval) { 1136 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n"); 1137 scsi_host_put(host); 1138 return retval; 1139 } 1140 1141 scsi_scan_host(host); 1142 return 0; 1143 } 1144 1145 /* 1146 * Place the SCSI bus into a known state by either resetting it, 1147 * or forcing transfer negotiations on the next command to any 1148 * target. 1149 */ 1150 void 1151 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc) 1152 { 1153 int i; 1154 int numtarg; 1155 unsigned long s; 1156 1157 i = 0; 1158 numtarg = 0; 1159 1160 ahc_lock(ahc, &s); 1161 1162 if (aic7xxx_no_reset != 0) 1163 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B); 1164 1165 if ((ahc->flags & AHC_RESET_BUS_A) != 0) 1166 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE); 1167 else 1168 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8; 1169 1170 if ((ahc->features & AHC_TWIN) != 0) { 1171 1172 if ((ahc->flags & AHC_RESET_BUS_B) != 0) { 1173 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE); 1174 } else { 1175 if (numtarg == 0) 1176 i = 8; 1177 numtarg += 8; 1178 } 1179 } 1180 1181 /* 1182 * Force negotiation to async for all targets that 1183 * will not see an initial bus reset. 1184 */ 1185 for (; i < numtarg; i++) { 1186 struct ahc_devinfo devinfo; 1187 struct ahc_initiator_tinfo *tinfo; 1188 struct ahc_tmode_tstate *tstate; 1189 u_int our_id; 1190 u_int target_id; 1191 char channel; 1192 1193 channel = 'A'; 1194 our_id = ahc->our_id; 1195 target_id = i; 1196 if (i > 7 && (ahc->features & AHC_TWIN) != 0) { 1197 channel = 'B'; 1198 our_id = ahc->our_id_b; 1199 target_id = i % 8; 1200 } 1201 tinfo = ahc_fetch_transinfo(ahc, channel, our_id, 1202 target_id, &tstate); 1203 ahc_compile_devinfo(&devinfo, our_id, target_id, 1204 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR); 1205 ahc_update_neg_request(ahc, &devinfo, tstate, 1206 tinfo, AHC_NEG_ALWAYS); 1207 } 1208 ahc_unlock(ahc, &s); 1209 /* Give the bus some time to recover */ 1210 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) { 1211 ahc_linux_freeze_simq(ahc); 1212 msleep(AIC7XXX_RESET_DELAY); 1213 ahc_linux_release_simq(ahc); 1214 } 1215 } 1216 1217 int 1218 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg) 1219 { 1220 1221 ahc->platform_data = 1222 malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT); 1223 if (ahc->platform_data == NULL) 1224 return (ENOMEM); 1225 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data)); 1226 ahc->platform_data->irq = AHC_LINUX_NOIRQ; 1227 ahc_lockinit(ahc); 1228 ahc->seltime = (aic7xxx_seltime & 0x3) << 4; 1229 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4; 1230 if (aic7xxx_pci_parity == 0) 1231 ahc->flags |= AHC_DISABLE_PCI_PERR; 1232 1233 return (0); 1234 } 1235 1236 void 1237 ahc_platform_free(struct ahc_softc *ahc) 1238 { 1239 struct scsi_target *starget; 1240 int i; 1241 1242 if (ahc->platform_data != NULL) { 1243 /* destroy all of the device and target objects */ 1244 for (i = 0; i < AHC_NUM_TARGETS; i++) { 1245 starget = ahc->platform_data->starget[i]; 1246 if (starget != NULL) { 1247 ahc->platform_data->starget[i] = NULL; 1248 } 1249 } 1250 1251 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ) 1252 free_irq(ahc->platform_data->irq, ahc); 1253 if (ahc->tag == BUS_SPACE_PIO 1254 && ahc->bsh.ioport != 0) 1255 release_region(ahc->bsh.ioport, 256); 1256 if (ahc->tag == BUS_SPACE_MEMIO 1257 && ahc->bsh.maddr != NULL) { 1258 iounmap(ahc->bsh.maddr); 1259 release_mem_region(ahc->platform_data->mem_busaddr, 1260 0x1000); 1261 } 1262 1263 if (ahc->platform_data->host) 1264 scsi_host_put(ahc->platform_data->host); 1265 1266 free(ahc->platform_data, M_DEVBUF); 1267 } 1268 } 1269 1270 void 1271 ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb) 1272 { 1273 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb), 1274 SCB_GET_CHANNEL(ahc, scb), 1275 SCB_GET_LUN(scb), SCB_LIST_NULL, 1276 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1277 } 1278 1279 void 1280 ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev, 1281 struct ahc_devinfo *devinfo, ahc_queue_alg alg) 1282 { 1283 struct ahc_linux_device *dev; 1284 int was_queuing; 1285 int now_queuing; 1286 1287 if (sdev == NULL) 1288 return; 1289 dev = scsi_transport_device_data(sdev); 1290 1291 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED); 1292 switch (alg) { 1293 default: 1294 case AHC_QUEUE_NONE: 1295 now_queuing = 0; 1296 break; 1297 case AHC_QUEUE_BASIC: 1298 now_queuing = AHC_DEV_Q_BASIC; 1299 break; 1300 case AHC_QUEUE_TAGGED: 1301 now_queuing = AHC_DEV_Q_TAGGED; 1302 break; 1303 } 1304 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0 1305 && (was_queuing != now_queuing) 1306 && (dev->active != 0)) { 1307 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY; 1308 dev->qfrozen++; 1309 } 1310 1311 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG); 1312 if (now_queuing) { 1313 u_int usertags; 1314 1315 usertags = ahc_linux_user_tagdepth(ahc, devinfo); 1316 if (!was_queuing) { 1317 /* 1318 * Start out agressively and allow our 1319 * dynamic queue depth algorithm to take 1320 * care of the rest. 1321 */ 1322 dev->maxtags = usertags; 1323 dev->openings = dev->maxtags - dev->active; 1324 } 1325 if (dev->maxtags == 0) { 1326 /* 1327 * Queueing is disabled by the user. 1328 */ 1329 dev->openings = 1; 1330 } else if (alg == AHC_QUEUE_TAGGED) { 1331 dev->flags |= AHC_DEV_Q_TAGGED; 1332 if (aic7xxx_periodic_otag != 0) 1333 dev->flags |= AHC_DEV_PERIODIC_OTAG; 1334 } else 1335 dev->flags |= AHC_DEV_Q_BASIC; 1336 } else { 1337 /* We can only have one opening. */ 1338 dev->maxtags = 0; 1339 dev->openings = 1 - dev->active; 1340 } 1341 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) { 1342 case AHC_DEV_Q_BASIC: 1343 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); 1344 scsi_activate_tcq(sdev, dev->openings + dev->active); 1345 break; 1346 case AHC_DEV_Q_TAGGED: 1347 scsi_set_tag_type(sdev, MSG_ORDERED_TAG); 1348 scsi_activate_tcq(sdev, dev->openings + dev->active); 1349 break; 1350 default: 1351 /* 1352 * We allow the OS to queue 2 untagged transactions to 1353 * us at any time even though we can only execute them 1354 * serially on the controller/device. This should 1355 * remove some latency. 1356 */ 1357 scsi_deactivate_tcq(sdev, 2); 1358 break; 1359 } 1360 } 1361 1362 int 1363 ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel, 1364 int lun, u_int tag, role_t role, uint32_t status) 1365 { 1366 return 0; 1367 } 1368 1369 static u_int 1370 ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 1371 { 1372 static int warned_user; 1373 u_int tags; 1374 1375 tags = 0; 1376 if ((ahc->user_discenable & devinfo->target_mask) != 0) { 1377 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) { 1378 if (warned_user == 0) { 1379 1380 printf(KERN_WARNING 1381 "aic7xxx: WARNING: Insufficient tag_info instances\n" 1382 "aic7xxx: for installed controllers. Using defaults\n" 1383 "aic7xxx: Please update the aic7xxx_tag_info array in\n" 1384 "aic7xxx: the aic7xxx_osm..c source file.\n"); 1385 warned_user++; 1386 } 1387 tags = AHC_MAX_QUEUE; 1388 } else { 1389 adapter_tag_info_t *tag_info; 1390 1391 tag_info = &aic7xxx_tag_info[ahc->unit]; 1392 tags = tag_info->tag_commands[devinfo->target_offset]; 1393 if (tags > AHC_MAX_QUEUE) 1394 tags = AHC_MAX_QUEUE; 1395 } 1396 } 1397 return (tags); 1398 } 1399 1400 /* 1401 * Determines the queue depth for a given device. 1402 */ 1403 static void 1404 ahc_linux_device_queue_depth(struct scsi_device *sdev) 1405 { 1406 struct ahc_devinfo devinfo; 1407 u_int tags; 1408 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata); 1409 1410 ahc_compile_devinfo(&devinfo, 1411 sdev->sdev_target->channel == 0 1412 ? ahc->our_id : ahc->our_id_b, 1413 sdev->sdev_target->id, sdev->lun, 1414 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1415 ROLE_INITIATOR); 1416 tags = ahc_linux_user_tagdepth(ahc, &devinfo); 1417 if (tags != 0 && sdev->tagged_supported != 0) { 1418 1419 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED); 1420 ahc_send_async(ahc, devinfo.channel, devinfo.target, 1421 devinfo.lun, AC_TRANSFER_NEG); 1422 ahc_print_devinfo(ahc, &devinfo); 1423 printf("Tagged Queuing enabled. Depth %d\n", tags); 1424 } else { 1425 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE); 1426 ahc_send_async(ahc, devinfo.channel, devinfo.target, 1427 devinfo.lun, AC_TRANSFER_NEG); 1428 } 1429 } 1430 1431 static int 1432 ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev, 1433 struct scsi_cmnd *cmd) 1434 { 1435 struct scb *scb; 1436 struct hardware_scb *hscb; 1437 struct ahc_initiator_tinfo *tinfo; 1438 struct ahc_tmode_tstate *tstate; 1439 uint16_t mask; 1440 struct scb_tailq *untagged_q = NULL; 1441 int nseg; 1442 1443 /* 1444 * Schedule us to run later. The only reason we are not 1445 * running is because the whole controller Q is frozen. 1446 */ 1447 if (ahc->platform_data->qfrozen != 0) 1448 return SCSI_MLQUEUE_HOST_BUSY; 1449 1450 /* 1451 * We only allow one untagged transaction 1452 * per target in the initiator role unless 1453 * we are storing a full busy target *lun* 1454 * table in SCB space. 1455 */ 1456 if (!blk_rq_tagged(cmd->request) 1457 && (ahc->features & AHC_SCB_BTT) == 0) { 1458 int target_offset; 1459 1460 target_offset = cmd->device->id + cmd->device->channel * 8; 1461 untagged_q = &(ahc->untagged_queues[target_offset]); 1462 if (!TAILQ_EMPTY(untagged_q)) 1463 /* if we're already executing an untagged command 1464 * we're busy to another */ 1465 return SCSI_MLQUEUE_DEVICE_BUSY; 1466 } 1467 1468 nseg = scsi_dma_map(cmd); 1469 if (nseg < 0) 1470 return SCSI_MLQUEUE_HOST_BUSY; 1471 1472 /* 1473 * Get an scb to use. 1474 */ 1475 scb = ahc_get_scb(ahc); 1476 if (!scb) { 1477 scsi_dma_unmap(cmd); 1478 return SCSI_MLQUEUE_HOST_BUSY; 1479 } 1480 1481 scb->io_ctx = cmd; 1482 scb->platform_data->dev = dev; 1483 hscb = scb->hscb; 1484 cmd->host_scribble = (char *)scb; 1485 1486 /* 1487 * Fill out basics of the HSCB. 1488 */ 1489 hscb->control = 0; 1490 hscb->scsiid = BUILD_SCSIID(ahc, cmd); 1491 hscb->lun = cmd->device->lun; 1492 mask = SCB_GET_TARGET_MASK(ahc, scb); 1493 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb), 1494 SCB_GET_OUR_ID(scb), 1495 SCB_GET_TARGET(ahc, scb), &tstate); 1496 hscb->scsirate = tinfo->scsirate; 1497 hscb->scsioffset = tinfo->curr.offset; 1498 if ((tstate->ultraenb & mask) != 0) 1499 hscb->control |= ULTRAENB; 1500 1501 if ((ahc->user_discenable & mask) != 0) 1502 hscb->control |= DISCENB; 1503 1504 if ((tstate->auto_negotiate & mask) != 0) { 1505 scb->flags |= SCB_AUTO_NEGOTIATE; 1506 scb->hscb->control |= MK_MESSAGE; 1507 } 1508 1509 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) { 1510 int msg_bytes; 1511 uint8_t tag_msgs[2]; 1512 1513 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); 1514 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { 1515 hscb->control |= tag_msgs[0]; 1516 if (tag_msgs[0] == MSG_ORDERED_TASK) 1517 dev->commands_since_idle_or_otag = 0; 1518 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH 1519 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) { 1520 hscb->control |= MSG_ORDERED_TASK; 1521 dev->commands_since_idle_or_otag = 0; 1522 } else { 1523 hscb->control |= MSG_SIMPLE_TASK; 1524 } 1525 } 1526 1527 hscb->cdb_len = cmd->cmd_len; 1528 if (hscb->cdb_len <= 12) { 1529 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len); 1530 } else { 1531 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len); 1532 scb->flags |= SCB_CDB32_PTR; 1533 } 1534 1535 scb->platform_data->xfer_len = 0; 1536 ahc_set_residual(scb, 0); 1537 ahc_set_sense_residual(scb, 0); 1538 scb->sg_count = 0; 1539 1540 if (nseg > 0) { 1541 struct ahc_dma_seg *sg; 1542 struct scatterlist *cur_seg; 1543 int i; 1544 1545 /* Copy the segments into the SG list. */ 1546 sg = scb->sg_list; 1547 /* 1548 * The sg_count may be larger than nseg if 1549 * a transfer crosses a 32bit page. 1550 */ 1551 scsi_for_each_sg(cmd, cur_seg, nseg, i) { 1552 dma_addr_t addr; 1553 bus_size_t len; 1554 int consumed; 1555 1556 addr = sg_dma_address(cur_seg); 1557 len = sg_dma_len(cur_seg); 1558 consumed = ahc_linux_map_seg(ahc, scb, 1559 sg, addr, len); 1560 sg += consumed; 1561 scb->sg_count += consumed; 1562 } 1563 sg--; 1564 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); 1565 1566 /* 1567 * Reset the sg list pointer. 1568 */ 1569 scb->hscb->sgptr = 1570 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); 1571 1572 /* 1573 * Copy the first SG into the "current" 1574 * data pointer area. 1575 */ 1576 scb->hscb->dataptr = scb->sg_list->addr; 1577 scb->hscb->datacnt = scb->sg_list->len; 1578 } else { 1579 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL); 1580 scb->hscb->dataptr = 0; 1581 scb->hscb->datacnt = 0; 1582 scb->sg_count = 0; 1583 } 1584 1585 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links); 1586 dev->openings--; 1587 dev->active++; 1588 dev->commands_issued++; 1589 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0) 1590 dev->commands_since_idle_or_otag++; 1591 1592 scb->flags |= SCB_ACTIVE; 1593 if (untagged_q) { 1594 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe); 1595 scb->flags |= SCB_UNTAGGEDQ; 1596 } 1597 ahc_queue_scb(ahc, scb); 1598 return 0; 1599 } 1600 1601 /* 1602 * SCSI controller interrupt handler. 1603 */ 1604 irqreturn_t 1605 ahc_linux_isr(int irq, void *dev_id) 1606 { 1607 struct ahc_softc *ahc; 1608 u_long flags; 1609 int ours; 1610 1611 ahc = (struct ahc_softc *) dev_id; 1612 ahc_lock(ahc, &flags); 1613 ours = ahc_intr(ahc); 1614 ahc_unlock(ahc, &flags); 1615 return IRQ_RETVAL(ours); 1616 } 1617 1618 void 1619 ahc_platform_flushwork(struct ahc_softc *ahc) 1620 { 1621 1622 } 1623 1624 void 1625 ahc_send_async(struct ahc_softc *ahc, char channel, 1626 u_int target, u_int lun, ac_code code) 1627 { 1628 switch (code) { 1629 case AC_TRANSFER_NEG: 1630 { 1631 char buf[80]; 1632 struct scsi_target *starget; 1633 struct ahc_linux_target *targ; 1634 struct info_str info; 1635 struct ahc_initiator_tinfo *tinfo; 1636 struct ahc_tmode_tstate *tstate; 1637 int target_offset; 1638 unsigned int target_ppr_options; 1639 1640 BUG_ON(target == CAM_TARGET_WILDCARD); 1641 1642 info.buffer = buf; 1643 info.length = sizeof(buf); 1644 info.offset = 0; 1645 info.pos = 0; 1646 tinfo = ahc_fetch_transinfo(ahc, channel, 1647 channel == 'A' ? ahc->our_id 1648 : ahc->our_id_b, 1649 target, &tstate); 1650 1651 /* 1652 * Don't bother reporting results while 1653 * negotiations are still pending. 1654 */ 1655 if (tinfo->curr.period != tinfo->goal.period 1656 || tinfo->curr.width != tinfo->goal.width 1657 || tinfo->curr.offset != tinfo->goal.offset 1658 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1659 if (bootverbose == 0) 1660 break; 1661 1662 /* 1663 * Don't bother reporting results that 1664 * are identical to those last reported. 1665 */ 1666 target_offset = target; 1667 if (channel == 'B') 1668 target_offset += 8; 1669 starget = ahc->platform_data->starget[target_offset]; 1670 if (starget == NULL) 1671 break; 1672 targ = scsi_transport_target_data(starget); 1673 1674 target_ppr_options = 1675 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1676 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1677 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0); 1678 1679 if (tinfo->curr.period == spi_period(starget) 1680 && tinfo->curr.width == spi_width(starget) 1681 && tinfo->curr.offset == spi_offset(starget) 1682 && tinfo->curr.ppr_options == target_ppr_options) 1683 if (bootverbose == 0) 1684 break; 1685 1686 spi_period(starget) = tinfo->curr.period; 1687 spi_width(starget) = tinfo->curr.width; 1688 spi_offset(starget) = tinfo->curr.offset; 1689 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1690 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1691 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1692 spi_display_xfer_agreement(starget); 1693 break; 1694 } 1695 case AC_SENT_BDR: 1696 { 1697 WARN_ON(lun != CAM_LUN_WILDCARD); 1698 scsi_report_device_reset(ahc->platform_data->host, 1699 channel - 'A', target); 1700 break; 1701 } 1702 case AC_BUS_RESET: 1703 if (ahc->platform_data->host != NULL) { 1704 scsi_report_bus_reset(ahc->platform_data->host, 1705 channel - 'A'); 1706 } 1707 break; 1708 default: 1709 panic("ahc_send_async: Unexpected async event"); 1710 } 1711 } 1712 1713 /* 1714 * Calls the higher level scsi done function and frees the scb. 1715 */ 1716 void 1717 ahc_done(struct ahc_softc *ahc, struct scb *scb) 1718 { 1719 struct scsi_cmnd *cmd; 1720 struct ahc_linux_device *dev; 1721 1722 LIST_REMOVE(scb, pending_links); 1723 if ((scb->flags & SCB_UNTAGGEDQ) != 0) { 1724 struct scb_tailq *untagged_q; 1725 int target_offset; 1726 1727 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); 1728 untagged_q = &(ahc->untagged_queues[target_offset]); 1729 TAILQ_REMOVE(untagged_q, scb, links.tqe); 1730 BUG_ON(!TAILQ_EMPTY(untagged_q)); 1731 } else if ((scb->flags & SCB_ACTIVE) == 0) { 1732 /* 1733 * Transactions aborted from the untagged queue may 1734 * not have been dispatched to the controller, so 1735 * only check the SCB_ACTIVE flag for tagged transactions. 1736 */ 1737 printf("SCB %d done'd twice\n", scb->hscb->tag); 1738 ahc_dump_card_state(ahc); 1739 panic("Stopping for safety"); 1740 } 1741 cmd = scb->io_ctx; 1742 dev = scb->platform_data->dev; 1743 dev->active--; 1744 dev->openings++; 1745 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1746 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1747 dev->qfrozen--; 1748 } 1749 ahc_linux_unmap_scb(ahc, scb); 1750 1751 /* 1752 * Guard against stale sense data. 1753 * The Linux mid-layer assumes that sense 1754 * was retrieved anytime the first byte of 1755 * the sense buffer looks "sane". 1756 */ 1757 cmd->sense_buffer[0] = 0; 1758 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) { 1759 uint32_t amount_xferred; 1760 1761 amount_xferred = 1762 ahc_get_transfer_length(scb) - ahc_get_residual(scb); 1763 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1764 #ifdef AHC_DEBUG 1765 if ((ahc_debug & AHC_SHOW_MISC) != 0) { 1766 ahc_print_path(ahc, scb); 1767 printf("Set CAM_UNCOR_PARITY\n"); 1768 } 1769 #endif 1770 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY); 1771 #ifdef AHC_REPORT_UNDERFLOWS 1772 /* 1773 * This code is disabled by default as some 1774 * clients of the SCSI system do not properly 1775 * initialize the underflow parameter. This 1776 * results in spurious termination of commands 1777 * that complete as expected (e.g. underflow is 1778 * allowed as command can return variable amounts 1779 * of data. 1780 */ 1781 } else if (amount_xferred < scb->io_ctx->underflow) { 1782 u_int i; 1783 1784 ahc_print_path(ahc, scb); 1785 printf("CDB:"); 1786 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1787 printf(" 0x%x", scb->io_ctx->cmnd[i]); 1788 printf("\n"); 1789 ahc_print_path(ahc, scb); 1790 printf("Saw underflow (%ld of %ld bytes). " 1791 "Treated as error\n", 1792 ahc_get_residual(scb), 1793 ahc_get_transfer_length(scb)); 1794 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1795 #endif 1796 } else { 1797 ahc_set_transaction_status(scb, CAM_REQ_CMP); 1798 } 1799 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1800 ahc_linux_handle_scsi_status(ahc, cmd->device, scb); 1801 } 1802 1803 if (dev->openings == 1 1804 && ahc_get_transaction_status(scb) == CAM_REQ_CMP 1805 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1806 dev->tag_success_count++; 1807 /* 1808 * Some devices deal with temporary internal resource 1809 * shortages by returning queue full. When the queue 1810 * full occurrs, we throttle back. Slowly try to get 1811 * back to our previous queue depth. 1812 */ 1813 if ((dev->openings + dev->active) < dev->maxtags 1814 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) { 1815 dev->tag_success_count = 0; 1816 dev->openings++; 1817 } 1818 1819 if (dev->active == 0) 1820 dev->commands_since_idle_or_otag = 0; 1821 1822 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1823 printf("Recovery SCB completes\n"); 1824 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT 1825 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED) 1826 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1827 1828 if (ahc->platform_data->eh_done) 1829 complete(ahc->platform_data->eh_done); 1830 } 1831 1832 ahc_free_scb(ahc, scb); 1833 ahc_linux_queue_cmd_complete(ahc, cmd); 1834 } 1835 1836 static void 1837 ahc_linux_handle_scsi_status(struct ahc_softc *ahc, 1838 struct scsi_device *sdev, struct scb *scb) 1839 { 1840 struct ahc_devinfo devinfo; 1841 struct ahc_linux_device *dev = scsi_transport_device_data(sdev); 1842 1843 ahc_compile_devinfo(&devinfo, 1844 ahc->our_id, 1845 sdev->sdev_target->id, sdev->lun, 1846 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1847 ROLE_INITIATOR); 1848 1849 /* 1850 * We don't currently trust the mid-layer to 1851 * properly deal with queue full or busy. So, 1852 * when one occurs, we tell the mid-layer to 1853 * unconditionally requeue the command to us 1854 * so that we can retry it ourselves. We also 1855 * implement our own throttling mechanism so 1856 * we don't clobber the device with too many 1857 * commands. 1858 */ 1859 switch (ahc_get_scsi_status(scb)) { 1860 default: 1861 break; 1862 case SCSI_STATUS_CHECK_COND: 1863 case SCSI_STATUS_CMD_TERMINATED: 1864 { 1865 struct scsi_cmnd *cmd; 1866 1867 /* 1868 * Copy sense information to the OS's cmd 1869 * structure if it is available. 1870 */ 1871 cmd = scb->io_ctx; 1872 if (scb->flags & SCB_SENSE) { 1873 u_int sense_size; 1874 1875 sense_size = min(sizeof(struct scsi_sense_data) 1876 - ahc_get_sense_residual(scb), 1877 (u_long)SCSI_SENSE_BUFFERSIZE); 1878 memcpy(cmd->sense_buffer, 1879 ahc_get_sense_buf(ahc, scb), sense_size); 1880 if (sense_size < SCSI_SENSE_BUFFERSIZE) 1881 memset(&cmd->sense_buffer[sense_size], 0, 1882 SCSI_SENSE_BUFFERSIZE - sense_size); 1883 cmd->result |= (DRIVER_SENSE << 24); 1884 #ifdef AHC_DEBUG 1885 if (ahc_debug & AHC_SHOW_SENSE) { 1886 int i; 1887 1888 printf("Copied %d bytes of sense data:", 1889 sense_size); 1890 for (i = 0; i < sense_size; i++) { 1891 if ((i & 0xF) == 0) 1892 printf("\n"); 1893 printf("0x%x ", cmd->sense_buffer[i]); 1894 } 1895 printf("\n"); 1896 } 1897 #endif 1898 } 1899 break; 1900 } 1901 case SCSI_STATUS_QUEUE_FULL: 1902 { 1903 /* 1904 * By the time the core driver has returned this 1905 * command, all other commands that were queued 1906 * to us but not the device have been returned. 1907 * This ensures that dev->active is equal to 1908 * the number of commands actually queued to 1909 * the device. 1910 */ 1911 dev->tag_success_count = 0; 1912 if (dev->active != 0) { 1913 /* 1914 * Drop our opening count to the number 1915 * of commands currently outstanding. 1916 */ 1917 dev->openings = 0; 1918 /* 1919 ahc_print_path(ahc, scb); 1920 printf("Dropping tag count to %d\n", dev->active); 1921 */ 1922 if (dev->active == dev->tags_on_last_queuefull) { 1923 1924 dev->last_queuefull_same_count++; 1925 /* 1926 * If we repeatedly see a queue full 1927 * at the same queue depth, this 1928 * device has a fixed number of tag 1929 * slots. Lock in this tag depth 1930 * so we stop seeing queue fulls from 1931 * this device. 1932 */ 1933 if (dev->last_queuefull_same_count 1934 == AHC_LOCK_TAGS_COUNT) { 1935 dev->maxtags = dev->active; 1936 ahc_print_path(ahc, scb); 1937 printf("Locking max tag count at %d\n", 1938 dev->active); 1939 } 1940 } else { 1941 dev->tags_on_last_queuefull = dev->active; 1942 dev->last_queuefull_same_count = 0; 1943 } 1944 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ); 1945 ahc_set_scsi_status(scb, SCSI_STATUS_OK); 1946 ahc_platform_set_tags(ahc, sdev, &devinfo, 1947 (dev->flags & AHC_DEV_Q_BASIC) 1948 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1949 break; 1950 } 1951 /* 1952 * Drop down to a single opening, and treat this 1953 * as if the target returned BUSY SCSI status. 1954 */ 1955 dev->openings = 1; 1956 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY); 1957 ahc_platform_set_tags(ahc, sdev, &devinfo, 1958 (dev->flags & AHC_DEV_Q_BASIC) 1959 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1960 break; 1961 } 1962 } 1963 } 1964 1965 static void 1966 ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd) 1967 { 1968 /* 1969 * Map CAM error codes into Linux Error codes. We 1970 * avoid the conversion so that the DV code has the 1971 * full error information available when making 1972 * state change decisions. 1973 */ 1974 { 1975 u_int new_status; 1976 1977 switch (ahc_cmd_get_transaction_status(cmd)) { 1978 case CAM_REQ_INPROG: 1979 case CAM_REQ_CMP: 1980 case CAM_SCSI_STATUS_ERROR: 1981 new_status = DID_OK; 1982 break; 1983 case CAM_REQ_ABORTED: 1984 new_status = DID_ABORT; 1985 break; 1986 case CAM_BUSY: 1987 new_status = DID_BUS_BUSY; 1988 break; 1989 case CAM_REQ_INVALID: 1990 case CAM_PATH_INVALID: 1991 new_status = DID_BAD_TARGET; 1992 break; 1993 case CAM_SEL_TIMEOUT: 1994 new_status = DID_NO_CONNECT; 1995 break; 1996 case CAM_SCSI_BUS_RESET: 1997 case CAM_BDR_SENT: 1998 new_status = DID_RESET; 1999 break; 2000 case CAM_UNCOR_PARITY: 2001 new_status = DID_PARITY; 2002 break; 2003 case CAM_CMD_TIMEOUT: 2004 new_status = DID_TIME_OUT; 2005 break; 2006 case CAM_UA_ABORT: 2007 case CAM_REQ_CMP_ERR: 2008 case CAM_AUTOSENSE_FAIL: 2009 case CAM_NO_HBA: 2010 case CAM_DATA_RUN_ERR: 2011 case CAM_UNEXP_BUSFREE: 2012 case CAM_SEQUENCE_FAIL: 2013 case CAM_CCB_LEN_ERR: 2014 case CAM_PROVIDE_FAIL: 2015 case CAM_REQ_TERMIO: 2016 case CAM_UNREC_HBA_ERROR: 2017 case CAM_REQ_TOO_BIG: 2018 new_status = DID_ERROR; 2019 break; 2020 case CAM_REQUEUE_REQ: 2021 new_status = DID_REQUEUE; 2022 break; 2023 default: 2024 /* We should never get here */ 2025 new_status = DID_ERROR; 2026 break; 2027 } 2028 2029 ahc_cmd_set_transaction_status(cmd, new_status); 2030 } 2031 2032 cmd->scsi_done(cmd); 2033 } 2034 2035 static void 2036 ahc_linux_freeze_simq(struct ahc_softc *ahc) 2037 { 2038 unsigned long s; 2039 2040 ahc_lock(ahc, &s); 2041 ahc->platform_data->qfrozen++; 2042 if (ahc->platform_data->qfrozen == 1) { 2043 scsi_block_requests(ahc->platform_data->host); 2044 2045 /* XXX What about Twin channels? */ 2046 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, 2047 CAM_LUN_WILDCARD, SCB_LIST_NULL, 2048 ROLE_INITIATOR, CAM_REQUEUE_REQ); 2049 } 2050 ahc_unlock(ahc, &s); 2051 } 2052 2053 static void 2054 ahc_linux_release_simq(struct ahc_softc *ahc) 2055 { 2056 u_long s; 2057 int unblock_reqs; 2058 2059 unblock_reqs = 0; 2060 ahc_lock(ahc, &s); 2061 if (ahc->platform_data->qfrozen > 0) 2062 ahc->platform_data->qfrozen--; 2063 if (ahc->platform_data->qfrozen == 0) 2064 unblock_reqs = 1; 2065 ahc_unlock(ahc, &s); 2066 /* 2067 * There is still a race here. The mid-layer 2068 * should keep its own freeze count and use 2069 * a bottom half handler to run the queues 2070 * so we can unblock with our own lock held. 2071 */ 2072 if (unblock_reqs) 2073 scsi_unblock_requests(ahc->platform_data->host); 2074 } 2075 2076 static int 2077 ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag) 2078 { 2079 struct ahc_softc *ahc; 2080 struct ahc_linux_device *dev; 2081 struct scb *pending_scb; 2082 u_int saved_scbptr; 2083 u_int active_scb_index; 2084 u_int last_phase; 2085 u_int saved_scsiid; 2086 u_int cdb_byte; 2087 int retval; 2088 int was_paused; 2089 int paused; 2090 int wait; 2091 int disconnected; 2092 unsigned long flags; 2093 2094 pending_scb = NULL; 2095 paused = FALSE; 2096 wait = FALSE; 2097 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 2098 2099 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n", 2100 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET"); 2101 2102 printf("CDB:"); 2103 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2104 printf(" 0x%x", cmd->cmnd[cdb_byte]); 2105 printf("\n"); 2106 2107 ahc_lock(ahc, &flags); 2108 2109 /* 2110 * First determine if we currently own this command. 2111 * Start by searching the device queue. If not found 2112 * there, check the pending_scb list. If not found 2113 * at all, and the system wanted us to just abort the 2114 * command, return success. 2115 */ 2116 dev = scsi_transport_device_data(cmd->device); 2117 2118 if (dev == NULL) { 2119 /* 2120 * No target device for this command exists, 2121 * so we must not still own the command. 2122 */ 2123 printf("%s:%d:%d:%d: Is not an active device\n", 2124 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2125 cmd->device->lun); 2126 retval = SUCCESS; 2127 goto no_cmd; 2128 } 2129 2130 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0 2131 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id, 2132 cmd->device->channel + 'A', 2133 cmd->device->lun, 2134 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) { 2135 printf("%s:%d:%d:%d: Command found on untagged queue\n", 2136 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2137 cmd->device->lun); 2138 retval = SUCCESS; 2139 goto done; 2140 } 2141 2142 /* 2143 * See if we can find a matching cmd in the pending list. 2144 */ 2145 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2146 if (pending_scb->io_ctx == cmd) 2147 break; 2148 } 2149 2150 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) { 2151 2152 /* Any SCB for this device will do for a target reset */ 2153 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2154 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd), 2155 scmd_channel(cmd) + 'A', 2156 CAM_LUN_WILDCARD, 2157 SCB_LIST_NULL, ROLE_INITIATOR)) 2158 break; 2159 } 2160 } 2161 2162 if (pending_scb == NULL) { 2163 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2164 goto no_cmd; 2165 } 2166 2167 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2168 /* 2169 * We can't queue two recovery actions using the same SCB 2170 */ 2171 retval = FAILED; 2172 goto done; 2173 } 2174 2175 /* 2176 * Ensure that the card doesn't do anything 2177 * behind our back and that we didn't "just" miss 2178 * an interrupt that would affect this cmd. 2179 */ 2180 was_paused = ahc_is_paused(ahc); 2181 ahc_pause_and_flushwork(ahc); 2182 paused = TRUE; 2183 2184 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2185 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2186 goto no_cmd; 2187 } 2188 2189 printf("%s: At time of recovery, card was %spaused\n", 2190 ahc_name(ahc), was_paused ? "" : "not "); 2191 ahc_dump_card_state(ahc); 2192 2193 disconnected = TRUE; 2194 if (flag == SCB_ABORT) { 2195 if (ahc_search_qinfifo(ahc, cmd->device->id, 2196 cmd->device->channel + 'A', 2197 cmd->device->lun, 2198 pending_scb->hscb->tag, 2199 ROLE_INITIATOR, CAM_REQ_ABORTED, 2200 SEARCH_COMPLETE) > 0) { 2201 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2202 ahc_name(ahc), cmd->device->channel, 2203 cmd->device->id, cmd->device->lun); 2204 retval = SUCCESS; 2205 goto done; 2206 } 2207 } else if (ahc_search_qinfifo(ahc, cmd->device->id, 2208 cmd->device->channel + 'A', 2209 cmd->device->lun, pending_scb->hscb->tag, 2210 ROLE_INITIATOR, /*status*/0, 2211 SEARCH_COUNT) > 0) { 2212 disconnected = FALSE; 2213 } 2214 2215 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2216 struct scb *bus_scb; 2217 2218 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG)); 2219 if (bus_scb == pending_scb) 2220 disconnected = FALSE; 2221 else if (flag != SCB_ABORT 2222 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid 2223 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb)) 2224 disconnected = FALSE; 2225 } 2226 2227 /* 2228 * At this point, pending_scb is the scb associated with the 2229 * passed in command. That command is currently active on the 2230 * bus, is in the disconnected state, or we're hoping to find 2231 * a command for the same target active on the bus to abuse to 2232 * send a BDR. Queue the appropriate message based on which of 2233 * these states we are in. 2234 */ 2235 last_phase = ahc_inb(ahc, LASTPHASE); 2236 saved_scbptr = ahc_inb(ahc, SCBPTR); 2237 active_scb_index = ahc_inb(ahc, SCB_TAG); 2238 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); 2239 if (last_phase != P_BUSFREE 2240 && (pending_scb->hscb->tag == active_scb_index 2241 || (flag == SCB_DEVICE_RESET 2242 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) { 2243 2244 /* 2245 * We're active on the bus, so assert ATN 2246 * and hope that the target responds. 2247 */ 2248 pending_scb = ahc_lookup_scb(ahc, active_scb_index); 2249 pending_scb->flags |= SCB_RECOVERY_SCB|flag; 2250 ahc_outb(ahc, MSG_OUT, HOST_MSG); 2251 ahc_outb(ahc, SCSISIGO, last_phase|ATNO); 2252 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2253 wait = TRUE; 2254 } else if (disconnected) { 2255 2256 /* 2257 * Actually re-queue this SCB in an attempt 2258 * to select the device before it reconnects. 2259 * In either case (selection or reselection), 2260 * we will now issue the approprate message 2261 * to the timed-out device. 2262 * 2263 * Set the MK_MESSAGE control bit indicating 2264 * that we desire to send a message. We 2265 * also set the disconnected flag since 2266 * in the paging case there is no guarantee 2267 * that our SCB control byte matches the 2268 * version on the card. We don't want the 2269 * sequencer to abort the command thinking 2270 * an unsolicited reselection occurred. 2271 */ 2272 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2273 pending_scb->flags |= SCB_RECOVERY_SCB|flag; 2274 2275 /* 2276 * Remove any cached copy of this SCB in the 2277 * disconnected list in preparation for the 2278 * queuing of our abort SCB. We use the 2279 * same element in the SCB, SCB_NEXT, for 2280 * both the qinfifo and the disconnected list. 2281 */ 2282 ahc_search_disc_list(ahc, cmd->device->id, 2283 cmd->device->channel + 'A', 2284 cmd->device->lun, pending_scb->hscb->tag, 2285 /*stop_on_first*/TRUE, 2286 /*remove*/TRUE, 2287 /*save_state*/FALSE); 2288 2289 /* 2290 * In the non-paging case, the sequencer will 2291 * never re-reference the in-core SCB. 2292 * To make sure we are notified during 2293 * reslection, set the MK_MESSAGE flag in 2294 * the card's copy of the SCB. 2295 */ 2296 if ((ahc->flags & AHC_PAGESCBS) == 0) { 2297 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag); 2298 ahc_outb(ahc, SCB_CONTROL, 2299 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE); 2300 } 2301 2302 /* 2303 * Clear out any entries in the QINFIFO first 2304 * so we are the next SCB for this target 2305 * to run. 2306 */ 2307 ahc_search_qinfifo(ahc, cmd->device->id, 2308 cmd->device->channel + 'A', 2309 cmd->device->lun, SCB_LIST_NULL, 2310 ROLE_INITIATOR, CAM_REQUEUE_REQ, 2311 SEARCH_COMPLETE); 2312 ahc_qinfifo_requeue_tail(ahc, pending_scb); 2313 ahc_outb(ahc, SCBPTR, saved_scbptr); 2314 ahc_print_path(ahc, pending_scb); 2315 printf("Device is disconnected, re-queuing SCB\n"); 2316 wait = TRUE; 2317 } else { 2318 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2319 retval = FAILED; 2320 goto done; 2321 } 2322 2323 no_cmd: 2324 /* 2325 * Our assumption is that if we don't have the command, no 2326 * recovery action was required, so we return success. Again, 2327 * the semantics of the mid-layer recovery engine are not 2328 * well defined, so this may change in time. 2329 */ 2330 retval = SUCCESS; 2331 done: 2332 if (paused) 2333 ahc_unpause(ahc); 2334 if (wait) { 2335 DECLARE_COMPLETION_ONSTACK(done); 2336 2337 ahc->platform_data->eh_done = &done; 2338 ahc_unlock(ahc, &flags); 2339 2340 printf("Recovery code sleeping\n"); 2341 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2342 ahc_lock(ahc, &flags); 2343 ahc->platform_data->eh_done = NULL; 2344 ahc_unlock(ahc, &flags); 2345 2346 printf("Timer Expired\n"); 2347 retval = FAILED; 2348 } 2349 printf("Recovery code awake\n"); 2350 } else 2351 ahc_unlock(ahc, &flags); 2352 return (retval); 2353 } 2354 2355 void 2356 ahc_platform_dump_card_state(struct ahc_softc *ahc) 2357 { 2358 } 2359 2360 static void ahc_linux_set_width(struct scsi_target *starget, int width) 2361 { 2362 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2363 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2364 struct ahc_devinfo devinfo; 2365 unsigned long flags; 2366 2367 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2368 starget->channel + 'A', ROLE_INITIATOR); 2369 ahc_lock(ahc, &flags); 2370 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE); 2371 ahc_unlock(ahc, &flags); 2372 } 2373 2374 static void ahc_linux_set_period(struct scsi_target *starget, int period) 2375 { 2376 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2377 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2378 struct ahc_tmode_tstate *tstate; 2379 struct ahc_initiator_tinfo *tinfo 2380 = ahc_fetch_transinfo(ahc, 2381 starget->channel + 'A', 2382 shost->this_id, starget->id, &tstate); 2383 struct ahc_devinfo devinfo; 2384 unsigned int ppr_options = tinfo->goal.ppr_options; 2385 unsigned long flags; 2386 unsigned long offset = tinfo->goal.offset; 2387 const struct ahc_syncrate *syncrate; 2388 2389 if (offset == 0) 2390 offset = MAX_OFFSET; 2391 2392 if (period < 9) 2393 period = 9; /* 12.5ns is our minimum */ 2394 if (period == 9) { 2395 if (spi_max_width(starget)) 2396 ppr_options |= MSG_EXT_PPR_DT_REQ; 2397 else 2398 /* need wide for DT and need DT for 12.5 ns */ 2399 period = 10; 2400 } 2401 2402 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2403 starget->channel + 'A', ROLE_INITIATOR); 2404 2405 /* all PPR requests apart from QAS require wide transfers */ 2406 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2407 if (spi_width(starget) == 0) 2408 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2409 } 2410 2411 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2412 ahc_lock(ahc, &flags); 2413 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2414 ppr_options, AHC_TRANS_GOAL, FALSE); 2415 ahc_unlock(ahc, &flags); 2416 } 2417 2418 static void ahc_linux_set_offset(struct scsi_target *starget, int offset) 2419 { 2420 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2421 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2422 struct ahc_tmode_tstate *tstate; 2423 struct ahc_initiator_tinfo *tinfo 2424 = ahc_fetch_transinfo(ahc, 2425 starget->channel + 'A', 2426 shost->this_id, starget->id, &tstate); 2427 struct ahc_devinfo devinfo; 2428 unsigned int ppr_options = 0; 2429 unsigned int period = 0; 2430 unsigned long flags; 2431 const struct ahc_syncrate *syncrate = NULL; 2432 2433 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2434 starget->channel + 'A', ROLE_INITIATOR); 2435 if (offset != 0) { 2436 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2437 period = tinfo->goal.period; 2438 ppr_options = tinfo->goal.ppr_options; 2439 } 2440 ahc_lock(ahc, &flags); 2441 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2442 ppr_options, AHC_TRANS_GOAL, FALSE); 2443 ahc_unlock(ahc, &flags); 2444 } 2445 2446 static void ahc_linux_set_dt(struct scsi_target *starget, int dt) 2447 { 2448 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2449 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2450 struct ahc_tmode_tstate *tstate; 2451 struct ahc_initiator_tinfo *tinfo 2452 = ahc_fetch_transinfo(ahc, 2453 starget->channel + 'A', 2454 shost->this_id, starget->id, &tstate); 2455 struct ahc_devinfo devinfo; 2456 unsigned int ppr_options = tinfo->goal.ppr_options 2457 & ~MSG_EXT_PPR_DT_REQ; 2458 unsigned int period = tinfo->goal.period; 2459 unsigned int width = tinfo->goal.width; 2460 unsigned long flags; 2461 const struct ahc_syncrate *syncrate; 2462 2463 if (dt && spi_max_width(starget)) { 2464 ppr_options |= MSG_EXT_PPR_DT_REQ; 2465 if (!width) 2466 ahc_linux_set_width(starget, 1); 2467 } else if (period == 9) 2468 period = 10; /* if resetting DT, period must be >= 25ns */ 2469 2470 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2471 starget->channel + 'A', ROLE_INITIATOR); 2472 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT); 2473 ahc_lock(ahc, &flags); 2474 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2475 ppr_options, AHC_TRANS_GOAL, FALSE); 2476 ahc_unlock(ahc, &flags); 2477 } 2478 2479 #if 0 2480 /* FIXME: This code claims to support IU and QAS. However, the actual 2481 * sequencer code and aic7xxx_core have no support for these parameters and 2482 * will get into a bad state if they're negotiated. Do not enable this 2483 * unless you know what you're doing */ 2484 static void ahc_linux_set_qas(struct scsi_target *starget, int qas) 2485 { 2486 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2487 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2488 struct ahc_tmode_tstate *tstate; 2489 struct ahc_initiator_tinfo *tinfo 2490 = ahc_fetch_transinfo(ahc, 2491 starget->channel + 'A', 2492 shost->this_id, starget->id, &tstate); 2493 struct ahc_devinfo devinfo; 2494 unsigned int ppr_options = tinfo->goal.ppr_options 2495 & ~MSG_EXT_PPR_QAS_REQ; 2496 unsigned int period = tinfo->goal.period; 2497 unsigned long flags; 2498 struct ahc_syncrate *syncrate; 2499 2500 if (qas) 2501 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2502 2503 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2504 starget->channel + 'A', ROLE_INITIATOR); 2505 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2506 ahc_lock(ahc, &flags); 2507 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2508 ppr_options, AHC_TRANS_GOAL, FALSE); 2509 ahc_unlock(ahc, &flags); 2510 } 2511 2512 static void ahc_linux_set_iu(struct scsi_target *starget, int iu) 2513 { 2514 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2515 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2516 struct ahc_tmode_tstate *tstate; 2517 struct ahc_initiator_tinfo *tinfo 2518 = ahc_fetch_transinfo(ahc, 2519 starget->channel + 'A', 2520 shost->this_id, starget->id, &tstate); 2521 struct ahc_devinfo devinfo; 2522 unsigned int ppr_options = tinfo->goal.ppr_options 2523 & ~MSG_EXT_PPR_IU_REQ; 2524 unsigned int period = tinfo->goal.period; 2525 unsigned long flags; 2526 struct ahc_syncrate *syncrate; 2527 2528 if (iu) 2529 ppr_options |= MSG_EXT_PPR_IU_REQ; 2530 2531 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2532 starget->channel + 'A', ROLE_INITIATOR); 2533 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2534 ahc_lock(ahc, &flags); 2535 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2536 ppr_options, AHC_TRANS_GOAL, FALSE); 2537 ahc_unlock(ahc, &flags); 2538 } 2539 #endif 2540 2541 static void ahc_linux_get_signalling(struct Scsi_Host *shost) 2542 { 2543 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata; 2544 unsigned long flags; 2545 u8 mode; 2546 2547 if (!(ahc->features & AHC_ULTRA2)) { 2548 /* non-LVD chipset, may not have SBLKCTL reg */ 2549 spi_signalling(shost) = 2550 ahc->features & AHC_HVD ? 2551 SPI_SIGNAL_HVD : 2552 SPI_SIGNAL_SE; 2553 return; 2554 } 2555 2556 ahc_lock(ahc, &flags); 2557 ahc_pause(ahc); 2558 mode = ahc_inb(ahc, SBLKCTL); 2559 ahc_unpause(ahc); 2560 ahc_unlock(ahc, &flags); 2561 2562 if (mode & ENAB40) 2563 spi_signalling(shost) = SPI_SIGNAL_LVD; 2564 else if (mode & ENAB20) 2565 spi_signalling(shost) = SPI_SIGNAL_SE; 2566 else 2567 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2568 } 2569 2570 static struct spi_function_template ahc_linux_transport_functions = { 2571 .set_offset = ahc_linux_set_offset, 2572 .show_offset = 1, 2573 .set_period = ahc_linux_set_period, 2574 .show_period = 1, 2575 .set_width = ahc_linux_set_width, 2576 .show_width = 1, 2577 .set_dt = ahc_linux_set_dt, 2578 .show_dt = 1, 2579 #if 0 2580 .set_iu = ahc_linux_set_iu, 2581 .show_iu = 1, 2582 .set_qas = ahc_linux_set_qas, 2583 .show_qas = 1, 2584 #endif 2585 .get_signalling = ahc_linux_get_signalling, 2586 }; 2587 2588 2589 2590 static int __init 2591 ahc_linux_init(void) 2592 { 2593 /* 2594 * If we've been passed any parameters, process them now. 2595 */ 2596 if (aic7xxx) 2597 aic7xxx_setup(aic7xxx); 2598 2599 ahc_linux_transport_template = 2600 spi_attach_transport(&ahc_linux_transport_functions); 2601 if (!ahc_linux_transport_template) 2602 return -ENODEV; 2603 2604 scsi_transport_reserve_device(ahc_linux_transport_template, 2605 sizeof(struct ahc_linux_device)); 2606 2607 ahc_linux_pci_init(); 2608 ahc_linux_eisa_init(); 2609 return 0; 2610 } 2611 2612 static void 2613 ahc_linux_exit(void) 2614 { 2615 ahc_linux_pci_exit(); 2616 ahc_linux_eisa_exit(); 2617 spi_release_transport(ahc_linux_transport_template); 2618 } 2619 2620 module_init(ahc_linux_init); 2621 module_exit(ahc_linux_exit); 2622