1 /* 2 * Adaptec AIC79xx device driver for Linux. 3 * 4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $ 5 * 6 * -------------------------------------------------------------------------- 7 * Copyright (c) 1994-2000 Justin T. Gibbs. 8 * Copyright (c) 1997-1999 Doug Ledford 9 * Copyright (c) 2000-2003 Adaptec Inc. 10 * All rights reserved. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions, and the following disclaimer, 17 * without modification. 18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 19 * substantially similar to the "NO WARRANTY" disclaimer below 20 * ("Disclaimer") and any redistribution must be conditioned upon 21 * including a substantially similar Disclaimer requirement for further 22 * binary redistribution. 23 * 3. Neither the names of the above-listed copyright holders nor the names 24 * of any contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * Alternatively, this software may be distributed under the terms of the 28 * GNU General Public License ("GPL") version 2 as published by the Free 29 * Software Foundation. 30 * 31 * NO WARRANTY 32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 42 * POSSIBILITY OF SUCH DAMAGES. 43 */ 44 45 #include "aic79xx_osm.h" 46 #include "aic79xx_inline.h" 47 #include <scsi/scsicam.h> 48 49 static struct scsi_transport_template *ahd_linux_transport_template = NULL; 50 51 #include <linux/init.h> /* __setup */ 52 #include <linux/mm.h> /* For fetching system memory size */ 53 #include <linux/blkdev.h> /* For block_size() */ 54 #include <linux/delay.h> /* For ssleep/msleep */ 55 #include <linux/device.h> 56 #include <linux/slab.h> 57 58 /* 59 * Bucket size for counting good commands in between bad ones. 60 */ 61 #define AHD_LINUX_ERR_THRESH 1000 62 63 /* 64 * Set this to the delay in seconds after SCSI bus reset. 65 * Note, we honor this only for the initial bus reset. 66 * The scsi error recovery code performs its own bus settle 67 * delay handling for error recovery actions. 68 */ 69 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS 70 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS 71 #else 72 #define AIC79XX_RESET_DELAY 5000 73 #endif 74 75 /* 76 * To change the default number of tagged transactions allowed per-device, 77 * add a line to the lilo.conf file like: 78 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" 79 * which will result in the first four devices on the first two 80 * controllers being set to a tagged queue depth of 32. 81 * 82 * The tag_commands is an array of 16 to allow for wide and twin adapters. 83 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 84 * for channel 1. 85 */ 86 typedef struct { 87 uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */ 88 } adapter_tag_info_t; 89 90 /* 91 * Modify this as you see fit for your system. 92 * 93 * 0 tagged queuing disabled 94 * 1 <= n <= 253 n == max tags ever dispatched. 95 * 96 * The driver will throttle the number of commands dispatched to a 97 * device if it returns queue full. For devices with a fixed maximum 98 * queue depth, the driver will eventually determine this depth and 99 * lock it in (a console message is printed to indicate that a lock 100 * has occurred). On some devices, queue full is returned for a temporary 101 * resource shortage. These devices will return queue full at varying 102 * depths. The driver will throttle back when the queue fulls occur and 103 * attempt to slowly increase the depth over time as the device recovers 104 * from the resource shortage. 105 * 106 * In this example, the first line will disable tagged queueing for all 107 * the devices on the first probed aic79xx adapter. 108 * 109 * The second line enables tagged queueing with 4 commands/LUN for IDs 110 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the 111 * driver to attempt to use up to 64 tags for ID 1. 112 * 113 * The third line is the same as the first line. 114 * 115 * The fourth line disables tagged queueing for devices 0 and 3. It 116 * enables tagged queueing for the other IDs, with 16 commands/LUN 117 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for 118 * IDs 2, 5-7, and 9-15. 119 */ 120 121 /* 122 * NOTE: The below structure is for reference only, the actual structure 123 * to modify in order to change things is just below this comment block. 124 adapter_tag_info_t aic79xx_tag_info[] = 125 { 126 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 127 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, 128 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 129 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} 130 }; 131 */ 132 133 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE 134 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE 135 #else 136 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE 137 #endif 138 139 #define AIC79XX_CONFIGED_TAG_COMMANDS { \ 140 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 141 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 142 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 143 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 144 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 145 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 146 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 147 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \ 148 } 149 150 /* 151 * By default, use the number of commands specified by 152 * the users kernel configuration. 153 */ 154 static adapter_tag_info_t aic79xx_tag_info[] = 155 { 156 {AIC79XX_CONFIGED_TAG_COMMANDS}, 157 {AIC79XX_CONFIGED_TAG_COMMANDS}, 158 {AIC79XX_CONFIGED_TAG_COMMANDS}, 159 {AIC79XX_CONFIGED_TAG_COMMANDS}, 160 {AIC79XX_CONFIGED_TAG_COMMANDS}, 161 {AIC79XX_CONFIGED_TAG_COMMANDS}, 162 {AIC79XX_CONFIGED_TAG_COMMANDS}, 163 {AIC79XX_CONFIGED_TAG_COMMANDS}, 164 {AIC79XX_CONFIGED_TAG_COMMANDS}, 165 {AIC79XX_CONFIGED_TAG_COMMANDS}, 166 {AIC79XX_CONFIGED_TAG_COMMANDS}, 167 {AIC79XX_CONFIGED_TAG_COMMANDS}, 168 {AIC79XX_CONFIGED_TAG_COMMANDS}, 169 {AIC79XX_CONFIGED_TAG_COMMANDS}, 170 {AIC79XX_CONFIGED_TAG_COMMANDS}, 171 {AIC79XX_CONFIGED_TAG_COMMANDS} 172 }; 173 174 /* 175 * The I/O cell on the chip is very configurable in respect to its analog 176 * characteristics. Set the defaults here; they can be overriden with 177 * the proper insmod parameters. 178 */ 179 struct ahd_linux_iocell_opts 180 { 181 uint8_t precomp; 182 uint8_t slewrate; 183 uint8_t amplitude; 184 }; 185 #define AIC79XX_DEFAULT_PRECOMP 0xFF 186 #define AIC79XX_DEFAULT_SLEWRATE 0xFF 187 #define AIC79XX_DEFAULT_AMPLITUDE 0xFF 188 #define AIC79XX_DEFAULT_IOOPTS \ 189 { \ 190 AIC79XX_DEFAULT_PRECOMP, \ 191 AIC79XX_DEFAULT_SLEWRATE, \ 192 AIC79XX_DEFAULT_AMPLITUDE \ 193 } 194 #define AIC79XX_PRECOMP_INDEX 0 195 #define AIC79XX_SLEWRATE_INDEX 1 196 #define AIC79XX_AMPLITUDE_INDEX 2 197 static const struct ahd_linux_iocell_opts aic79xx_iocell_info[] = 198 { 199 AIC79XX_DEFAULT_IOOPTS, 200 AIC79XX_DEFAULT_IOOPTS, 201 AIC79XX_DEFAULT_IOOPTS, 202 AIC79XX_DEFAULT_IOOPTS, 203 AIC79XX_DEFAULT_IOOPTS, 204 AIC79XX_DEFAULT_IOOPTS, 205 AIC79XX_DEFAULT_IOOPTS, 206 AIC79XX_DEFAULT_IOOPTS, 207 AIC79XX_DEFAULT_IOOPTS, 208 AIC79XX_DEFAULT_IOOPTS, 209 AIC79XX_DEFAULT_IOOPTS, 210 AIC79XX_DEFAULT_IOOPTS, 211 AIC79XX_DEFAULT_IOOPTS, 212 AIC79XX_DEFAULT_IOOPTS, 213 AIC79XX_DEFAULT_IOOPTS, 214 AIC79XX_DEFAULT_IOOPTS 215 }; 216 217 /* 218 * There should be a specific return value for this in scsi.h, but 219 * it seems that most drivers ignore it. 220 */ 221 #define DID_UNDERFLOW DID_ERROR 222 223 void 224 ahd_print_path(struct ahd_softc *ahd, struct scb *scb) 225 { 226 printk("(scsi%d:%c:%d:%d): ", 227 ahd->platform_data->host->host_no, 228 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X', 229 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1, 230 scb != NULL ? SCB_GET_LUN(scb) : -1); 231 } 232 233 /* 234 * XXX - these options apply unilaterally to _all_ adapters 235 * cards in the system. This should be fixed. Exceptions to this 236 * rule are noted in the comments. 237 */ 238 239 /* 240 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This 241 * has no effect on any later resets that might occur due to things like 242 * SCSI bus timeouts. 243 */ 244 static uint32_t aic79xx_no_reset; 245 246 /* 247 * Should we force EXTENDED translation on a controller. 248 * 0 == Use whatever is in the SEEPROM or default to off 249 * 1 == Use whatever is in the SEEPROM or default to on 250 */ 251 static uint32_t aic79xx_extended; 252 253 /* 254 * PCI bus parity checking of the Adaptec controllers. This is somewhat 255 * dubious at best. To my knowledge, this option has never actually 256 * solved a PCI parity problem, but on certain machines with broken PCI 257 * chipset configurations, it can generate tons of false error messages. 258 * It's included in the driver for completeness. 259 * 0 = Shut off PCI parity check 260 * non-0 = Enable PCI parity check 261 * 262 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this 263 * variable to -1 you would actually want to simply pass the variable 264 * name without a number. That will invert the 0 which will result in 265 * -1. 266 */ 267 static uint32_t aic79xx_pci_parity = ~0; 268 269 /* 270 * There are lots of broken chipsets in the world. Some of them will 271 * violate the PCI spec when we issue byte sized memory writes to our 272 * controller. I/O mapped register access, if allowed by the given 273 * platform, will work in almost all cases. 274 */ 275 uint32_t aic79xx_allow_memio = ~0; 276 277 /* 278 * So that we can set how long each device is given as a selection timeout. 279 * The table of values goes like this: 280 * 0 - 256ms 281 * 1 - 128ms 282 * 2 - 64ms 283 * 3 - 32ms 284 * We default to 256ms because some older devices need a longer time 285 * to respond to initial selection. 286 */ 287 static uint32_t aic79xx_seltime; 288 289 /* 290 * Certain devices do not perform any aging on commands. Should the 291 * device be saturated by commands in one portion of the disk, it is 292 * possible for transactions on far away sectors to never be serviced. 293 * To handle these devices, we can periodically send an ordered tag to 294 * force all outstanding transactions to be serviced prior to a new 295 * transaction. 296 */ 297 static uint32_t aic79xx_periodic_otag; 298 299 /* Some storage boxes are using an LSI chip which has a bug making it 300 * impossible to use aic79xx Rev B chip in 320 speeds. The following 301 * storage boxes have been reported to be buggy: 302 * EonStor 3U 16-Bay: U16U-G3A3 303 * EonStor 2U 12-Bay: U12U-G3A3 304 * SentinelRAID: 2500F R5 / R6 305 * SentinelRAID: 2500F R1 306 * SentinelRAID: 2500F/1500F 307 * SentinelRAID: 150F 308 * 309 * To get around this LSI bug, you can set your board to 160 mode 310 * or you can enable the SLOWCRC bit. 311 */ 312 uint32_t aic79xx_slowcrc; 313 314 /* 315 * Module information and settable options. 316 */ 317 static char *aic79xx = NULL; 318 319 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>"); 320 MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver"); 321 MODULE_LICENSE("Dual BSD/GPL"); 322 MODULE_VERSION(AIC79XX_DRIVER_VERSION); 323 module_param(aic79xx, charp, 0444); 324 MODULE_PARM_DESC(aic79xx, 325 "period-delimited options string:\n" 326 " verbose Enable verbose/diagnostic logging\n" 327 " allow_memio Allow device registers to be memory mapped\n" 328 " debug Bitmask of debug values to enable\n" 329 " no_reset Suppress initial bus resets\n" 330 " extended Enable extended geometry on all controllers\n" 331 " periodic_otag Send an ordered tagged transaction\n" 332 " periodically to prevent tag starvation.\n" 333 " This may be required by some older disk\n" 334 " or drives/RAID arrays.\n" 335 " tag_info:<tag_str> Set per-target tag depth\n" 336 " global_tag_depth:<int> Global tag depth for all targets on all buses\n" 337 " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n" 338 " precomp:<pcomp_list> Set the signal precompensation (0-7).\n" 339 " amplitude:<int> Set the signal amplitude (0-7).\n" 340 " seltime:<int> Selection Timeout:\n" 341 " (0/256ms,1/128ms,2/64ms,3/32ms)\n" 342 " slowcrc Turn on the SLOWCRC bit (Rev B only)\n" 343 "\n" 344 " Sample modprobe configuration file:\n" 345 " # Enable verbose logging\n" 346 " # Set tag depth on Controller 2/Target 2 to 10 tags\n" 347 " # Shorten the selection timeout to 128ms\n" 348 "\n" 349 " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n" 350 ); 351 352 static void ahd_linux_handle_scsi_status(struct ahd_softc *, 353 struct scsi_device *, 354 struct scb *); 355 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, 356 struct scsi_cmnd *cmd); 357 static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd); 358 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd); 359 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd, 360 struct ahd_devinfo *devinfo); 361 static void ahd_linux_device_queue_depth(struct scsi_device *); 362 static int ahd_linux_run_command(struct ahd_softc*, 363 struct ahd_linux_device *, 364 struct scsi_cmnd *); 365 static void ahd_linux_setup_tag_info_global(char *p); 366 static int aic79xx_setup(char *c); 367 static void ahd_freeze_simq(struct ahd_softc *ahd); 368 static void ahd_release_simq(struct ahd_softc *ahd); 369 370 static int ahd_linux_unit; 371 372 373 /************************** OS Utility Wrappers *******************************/ 374 void ahd_delay(long); 375 void 376 ahd_delay(long usec) 377 { 378 /* 379 * udelay on Linux can have problems for 380 * multi-millisecond waits. Wait at most 381 * 1024us per call. 382 */ 383 while (usec > 0) { 384 udelay(usec % 1024); 385 usec -= 1024; 386 } 387 } 388 389 390 /***************************** Low Level I/O **********************************/ 391 uint8_t ahd_inb(struct ahd_softc * ahd, long port); 392 void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val); 393 void ahd_outw_atomic(struct ahd_softc * ahd, 394 long port, uint16_t val); 395 void ahd_outsb(struct ahd_softc * ahd, long port, 396 uint8_t *, int count); 397 void ahd_insb(struct ahd_softc * ahd, long port, 398 uint8_t *, int count); 399 400 uint8_t 401 ahd_inb(struct ahd_softc * ahd, long port) 402 { 403 uint8_t x; 404 405 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 406 x = readb(ahd->bshs[0].maddr + port); 407 } else { 408 x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF)); 409 } 410 mb(); 411 return (x); 412 } 413 414 #if 0 /* unused */ 415 static uint16_t 416 ahd_inw_atomic(struct ahd_softc * ahd, long port) 417 { 418 uint8_t x; 419 420 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 421 x = readw(ahd->bshs[0].maddr + port); 422 } else { 423 x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF)); 424 } 425 mb(); 426 return (x); 427 } 428 #endif 429 430 void 431 ahd_outb(struct ahd_softc * ahd, long port, uint8_t val) 432 { 433 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 434 writeb(val, ahd->bshs[0].maddr + port); 435 } else { 436 outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF)); 437 } 438 mb(); 439 } 440 441 void 442 ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val) 443 { 444 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 445 writew(val, ahd->bshs[0].maddr + port); 446 } else { 447 outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF)); 448 } 449 mb(); 450 } 451 452 void 453 ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count) 454 { 455 int i; 456 457 /* 458 * There is probably a more efficient way to do this on Linux 459 * but we don't use this for anything speed critical and this 460 * should work. 461 */ 462 for (i = 0; i < count; i++) 463 ahd_outb(ahd, port, *array++); 464 } 465 466 void 467 ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count) 468 { 469 int i; 470 471 /* 472 * There is probably a more efficient way to do this on Linux 473 * but we don't use this for anything speed critical and this 474 * should work. 475 */ 476 for (i = 0; i < count; i++) 477 *array++ = ahd_inb(ahd, port); 478 } 479 480 /******************************* PCI Routines *********************************/ 481 uint32_t 482 ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width) 483 { 484 switch (width) { 485 case 1: 486 { 487 uint8_t retval; 488 489 pci_read_config_byte(pci, reg, &retval); 490 return (retval); 491 } 492 case 2: 493 { 494 uint16_t retval; 495 pci_read_config_word(pci, reg, &retval); 496 return (retval); 497 } 498 case 4: 499 { 500 uint32_t retval; 501 pci_read_config_dword(pci, reg, &retval); 502 return (retval); 503 } 504 default: 505 panic("ahd_pci_read_config: Read size too big"); 506 /* NOTREACHED */ 507 return (0); 508 } 509 } 510 511 void 512 ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width) 513 { 514 switch (width) { 515 case 1: 516 pci_write_config_byte(pci, reg, value); 517 break; 518 case 2: 519 pci_write_config_word(pci, reg, value); 520 break; 521 case 4: 522 pci_write_config_dword(pci, reg, value); 523 break; 524 default: 525 panic("ahd_pci_write_config: Write size too big"); 526 /* NOTREACHED */ 527 } 528 } 529 530 /****************************** Inlines ***************************************/ 531 static void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*); 532 533 static void 534 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb) 535 { 536 struct scsi_cmnd *cmd; 537 538 cmd = scb->io_ctx; 539 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE); 540 scsi_dma_unmap(cmd); 541 } 542 543 /******************************** Macros **************************************/ 544 #define BUILD_SCSIID(ahd, cmd) \ 545 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id) 546 547 /* 548 * Return a string describing the driver. 549 */ 550 static const char * 551 ahd_linux_info(struct Scsi_Host *host) 552 { 553 static char buffer[512]; 554 char ahd_info[256]; 555 char *bp; 556 struct ahd_softc *ahd; 557 558 bp = &buffer[0]; 559 ahd = *(struct ahd_softc **)host->hostdata; 560 memset(bp, 0, sizeof(buffer)); 561 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev " AIC79XX_DRIVER_VERSION "\n" 562 " <"); 563 strcat(bp, ahd->description); 564 strcat(bp, ">\n" 565 " "); 566 ahd_controller_info(ahd, ahd_info); 567 strcat(bp, ahd_info); 568 569 return (bp); 570 } 571 572 /* 573 * Queue an SCB to the controller. 574 */ 575 static int ahd_linux_queue_lck(struct scsi_cmnd *cmd) 576 { 577 struct ahd_softc *ahd; 578 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device); 579 int rtn = SCSI_MLQUEUE_HOST_BUSY; 580 581 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 582 583 cmd->result = CAM_REQ_INPROG << 16; 584 rtn = ahd_linux_run_command(ahd, dev, cmd); 585 586 return rtn; 587 } 588 589 static DEF_SCSI_QCMD(ahd_linux_queue) 590 591 static struct scsi_target ** 592 ahd_linux_target_in_softc(struct scsi_target *starget) 593 { 594 struct ahd_softc *ahd = 595 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 596 unsigned int target_offset; 597 598 target_offset = starget->id; 599 if (starget->channel != 0) 600 target_offset += 8; 601 602 return &ahd->platform_data->starget[target_offset]; 603 } 604 605 static int 606 ahd_linux_target_alloc(struct scsi_target *starget) 607 { 608 struct ahd_softc *ahd = 609 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 610 struct seeprom_config *sc = ahd->seep_config; 611 unsigned long flags; 612 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 613 struct ahd_devinfo devinfo; 614 struct ahd_initiator_tinfo *tinfo; 615 struct ahd_tmode_tstate *tstate; 616 char channel = starget->channel + 'A'; 617 618 ahd_lock(ahd, &flags); 619 620 BUG_ON(*ahd_targp != NULL); 621 622 *ahd_targp = starget; 623 624 if (sc) { 625 int flags = sc->device_flags[starget->id]; 626 627 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 628 starget->id, &tstate); 629 630 if ((flags & CFPACKETIZED) == 0) { 631 /* don't negotiate packetized (IU) transfers */ 632 spi_max_iu(starget) = 0; 633 } else { 634 if ((ahd->features & AHD_RTI) == 0) 635 spi_rti(starget) = 0; 636 } 637 638 if ((flags & CFQAS) == 0) 639 spi_max_qas(starget) = 0; 640 641 /* Transinfo values have been set to BIOS settings */ 642 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; 643 spi_min_period(starget) = tinfo->user.period; 644 spi_max_offset(starget) = tinfo->user.offset; 645 } 646 647 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 648 starget->id, &tstate); 649 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id, 650 CAM_LUN_WILDCARD, channel, 651 ROLE_INITIATOR); 652 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0, 653 AHD_TRANS_GOAL, /*paused*/FALSE); 654 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 655 AHD_TRANS_GOAL, /*paused*/FALSE); 656 ahd_unlock(ahd, &flags); 657 658 return 0; 659 } 660 661 static void 662 ahd_linux_target_destroy(struct scsi_target *starget) 663 { 664 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 665 666 *ahd_targp = NULL; 667 } 668 669 static int 670 ahd_linux_slave_alloc(struct scsi_device *sdev) 671 { 672 struct ahd_softc *ahd = 673 *((struct ahd_softc **)sdev->host->hostdata); 674 struct ahd_linux_device *dev; 675 676 if (bootverbose) 677 printk("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id); 678 679 dev = scsi_transport_device_data(sdev); 680 memset(dev, 0, sizeof(*dev)); 681 682 /* 683 * We start out life using untagged 684 * transactions of which we allow one. 685 */ 686 dev->openings = 1; 687 688 /* 689 * Set maxtags to 0. This will be changed if we 690 * later determine that we are dealing with 691 * a tagged queuing capable device. 692 */ 693 dev->maxtags = 0; 694 695 return (0); 696 } 697 698 static int 699 ahd_linux_slave_configure(struct scsi_device *sdev) 700 { 701 if (bootverbose) 702 sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); 703 704 ahd_linux_device_queue_depth(sdev); 705 706 /* Initial Domain Validation */ 707 if (!spi_initial_dv(sdev->sdev_target)) 708 spi_dv_device(sdev); 709 710 return 0; 711 } 712 713 #if defined(__i386__) 714 /* 715 * Return the disk geometry for the given SCSI device. 716 */ 717 static int 718 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 719 sector_t capacity, int geom[]) 720 { 721 int heads; 722 int sectors; 723 int cylinders; 724 int extended; 725 struct ahd_softc *ahd; 726 727 ahd = *((struct ahd_softc **)sdev->host->hostdata); 728 729 if (scsi_partsize(bdev, capacity, geom)) 730 return 0; 731 732 heads = 64; 733 sectors = 32; 734 cylinders = aic_sector_div(capacity, heads, sectors); 735 736 if (aic79xx_extended != 0) 737 extended = 1; 738 else 739 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0; 740 if (extended && cylinders >= 1024) { 741 heads = 255; 742 sectors = 63; 743 cylinders = aic_sector_div(capacity, heads, sectors); 744 } 745 geom[0] = heads; 746 geom[1] = sectors; 747 geom[2] = cylinders; 748 return (0); 749 } 750 #endif 751 752 /* 753 * Abort the current SCSI command(s). 754 */ 755 static int 756 ahd_linux_abort(struct scsi_cmnd *cmd) 757 { 758 return ahd_linux_queue_abort_cmd(cmd); 759 } 760 761 /* 762 * Attempt to send a target reset message to the device that timed out. 763 */ 764 static int 765 ahd_linux_dev_reset(struct scsi_cmnd *cmd) 766 { 767 struct ahd_softc *ahd; 768 struct ahd_linux_device *dev; 769 struct scb *reset_scb; 770 u_int cdb_byte; 771 int retval = SUCCESS; 772 struct ahd_initiator_tinfo *tinfo; 773 struct ahd_tmode_tstate *tstate; 774 unsigned long flags; 775 DECLARE_COMPLETION_ONSTACK(done); 776 777 reset_scb = NULL; 778 779 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 780 781 scmd_printk(KERN_INFO, cmd, 782 "Attempting to queue a TARGET RESET message:"); 783 784 printk("CDB:"); 785 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 786 printk(" 0x%x", cmd->cmnd[cdb_byte]); 787 printk("\n"); 788 789 /* 790 * Determine if we currently own this command. 791 */ 792 dev = scsi_transport_device_data(cmd->device); 793 794 if (dev == NULL) { 795 /* 796 * No target device for this command exists, 797 * so we must not still own the command. 798 */ 799 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 800 return SUCCESS; 801 } 802 803 /* 804 * Generate us a new SCB 805 */ 806 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX); 807 if (!reset_scb) { 808 scmd_printk(KERN_INFO, cmd, "No SCB available\n"); 809 return FAILED; 810 } 811 812 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 813 cmd->device->id, &tstate); 814 reset_scb->io_ctx = cmd; 815 reset_scb->platform_data->dev = dev; 816 reset_scb->sg_count = 0; 817 ahd_set_residual(reset_scb, 0); 818 ahd_set_sense_residual(reset_scb, 0); 819 reset_scb->platform_data->xfer_len = 0; 820 reset_scb->hscb->control = 0; 821 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd); 822 reset_scb->hscb->lun = cmd->device->lun; 823 reset_scb->hscb->cdb_len = 0; 824 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET; 825 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE; 826 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 827 reset_scb->flags |= SCB_PACKETIZED; 828 } else { 829 reset_scb->hscb->control |= MK_MESSAGE; 830 } 831 dev->openings--; 832 dev->active++; 833 dev->commands_issued++; 834 835 ahd_lock(ahd, &flags); 836 837 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links); 838 ahd_queue_scb(ahd, reset_scb); 839 840 ahd->platform_data->eh_done = &done; 841 ahd_unlock(ahd, &flags); 842 843 printk("%s: Device reset code sleeping\n", ahd_name(ahd)); 844 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 845 ahd_lock(ahd, &flags); 846 ahd->platform_data->eh_done = NULL; 847 ahd_unlock(ahd, &flags); 848 printk("%s: Device reset timer expired (active %d)\n", 849 ahd_name(ahd), dev->active); 850 retval = FAILED; 851 } 852 printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval); 853 854 return (retval); 855 } 856 857 /* 858 * Reset the SCSI bus. 859 */ 860 static int 861 ahd_linux_bus_reset(struct scsi_cmnd *cmd) 862 { 863 struct ahd_softc *ahd; 864 int found; 865 unsigned long flags; 866 867 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 868 #ifdef AHD_DEBUG 869 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) 870 printk("%s: Bus reset called for cmd %p\n", 871 ahd_name(ahd), cmd); 872 #endif 873 ahd_lock(ahd, &flags); 874 875 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A', 876 /*initiate reset*/TRUE); 877 ahd_unlock(ahd, &flags); 878 879 if (bootverbose) 880 printk("%s: SCSI bus reset delivered. " 881 "%d SCBs aborted.\n", ahd_name(ahd), found); 882 883 return (SUCCESS); 884 } 885 886 struct scsi_host_template aic79xx_driver_template = { 887 .module = THIS_MODULE, 888 .name = "aic79xx", 889 .proc_name = "aic79xx", 890 .show_info = ahd_linux_show_info, 891 .write_info = ahd_proc_write_seeprom, 892 .info = ahd_linux_info, 893 .queuecommand = ahd_linux_queue, 894 .eh_abort_handler = ahd_linux_abort, 895 .eh_device_reset_handler = ahd_linux_dev_reset, 896 .eh_bus_reset_handler = ahd_linux_bus_reset, 897 #if defined(__i386__) 898 .bios_param = ahd_linux_biosparam, 899 #endif 900 .can_queue = AHD_MAX_QUEUE, 901 .this_id = -1, 902 .max_sectors = 8192, 903 .cmd_per_lun = 2, 904 .slave_alloc = ahd_linux_slave_alloc, 905 .slave_configure = ahd_linux_slave_configure, 906 .target_alloc = ahd_linux_target_alloc, 907 .target_destroy = ahd_linux_target_destroy, 908 }; 909 910 /******************************** Bus DMA *************************************/ 911 int 912 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent, 913 bus_size_t alignment, bus_size_t boundary, 914 dma_addr_t lowaddr, dma_addr_t highaddr, 915 bus_dma_filter_t *filter, void *filterarg, 916 bus_size_t maxsize, int nsegments, 917 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 918 { 919 bus_dma_tag_t dmat; 920 921 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC); 922 if (dmat == NULL) 923 return (ENOMEM); 924 925 /* 926 * Linux is very simplistic about DMA memory. For now don't 927 * maintain all specification information. Once Linux supplies 928 * better facilities for doing these operations, or the 929 * needs of this particular driver change, we might need to do 930 * more here. 931 */ 932 dmat->alignment = alignment; 933 dmat->boundary = boundary; 934 dmat->maxsize = maxsize; 935 *ret_tag = dmat; 936 return (0); 937 } 938 939 void 940 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat) 941 { 942 kfree(dmat); 943 } 944 945 int 946 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr, 947 int flags, bus_dmamap_t *mapp) 948 { 949 *vaddr = dma_alloc_coherent(&ahd->dev_softc->dev, dmat->maxsize, mapp, 950 GFP_ATOMIC); 951 if (*vaddr == NULL) 952 return (ENOMEM); 953 return(0); 954 } 955 956 void 957 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat, 958 void* vaddr, bus_dmamap_t map) 959 { 960 dma_free_coherent(&ahd->dev_softc->dev, dmat->maxsize, vaddr, map); 961 } 962 963 int 964 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map, 965 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 966 void *cb_arg, int flags) 967 { 968 /* 969 * Assume for now that this will only be used during 970 * initialization and not for per-transaction buffer mapping. 971 */ 972 bus_dma_segment_t stack_sg; 973 974 stack_sg.ds_addr = map; 975 stack_sg.ds_len = dmat->maxsize; 976 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 977 return (0); 978 } 979 980 void 981 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 982 { 983 } 984 985 int 986 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 987 { 988 /* Nothing to do */ 989 return (0); 990 } 991 992 /********************* Platform Dependent Functions ***************************/ 993 static void 994 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value) 995 { 996 997 if ((instance >= 0) 998 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) { 999 uint8_t *iocell_info; 1000 1001 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance]; 1002 iocell_info[index] = value & 0xFFFF; 1003 if (bootverbose) 1004 printk("iocell[%d:%ld] = %d\n", instance, index, value); 1005 } 1006 } 1007 1008 static void 1009 ahd_linux_setup_tag_info_global(char *p) 1010 { 1011 int tags, i, j; 1012 1013 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 1014 printk("Setting Global Tags= %d\n", tags); 1015 1016 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) { 1017 for (j = 0; j < AHD_NUM_TARGETS; j++) { 1018 aic79xx_tag_info[i].tag_commands[j] = tags; 1019 } 1020 } 1021 } 1022 1023 static void 1024 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 1025 { 1026 1027 if ((instance >= 0) && (targ >= 0) 1028 && (instance < ARRAY_SIZE(aic79xx_tag_info)) 1029 && (targ < AHD_NUM_TARGETS)) { 1030 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF; 1031 if (bootverbose) 1032 printk("tag_info[%d:%d] = %d\n", instance, targ, value); 1033 } 1034 } 1035 1036 static char * 1037 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 1038 void (*callback)(u_long, int, int, int32_t), 1039 u_long callback_arg) 1040 { 1041 char *tok_end; 1042 char *tok_end2; 1043 int i; 1044 int instance; 1045 int targ; 1046 int done; 1047 char tok_list[] = {'.', ',', '{', '}', '\0'}; 1048 1049 /* All options use a ':' name/arg separator */ 1050 if (*opt_arg != ':') 1051 return (opt_arg); 1052 opt_arg++; 1053 instance = -1; 1054 targ = -1; 1055 done = FALSE; 1056 /* 1057 * Restore separator that may be in 1058 * the middle of our option argument. 1059 */ 1060 tok_end = strchr(opt_arg, '\0'); 1061 if (tok_end < end) 1062 *tok_end = ','; 1063 while (!done) { 1064 switch (*opt_arg) { 1065 case '{': 1066 if (instance == -1) { 1067 instance = 0; 1068 } else { 1069 if (depth > 1) { 1070 if (targ == -1) 1071 targ = 0; 1072 } else { 1073 printk("Malformed Option %s\n", 1074 opt_name); 1075 done = TRUE; 1076 } 1077 } 1078 opt_arg++; 1079 break; 1080 case '}': 1081 if (targ != -1) 1082 targ = -1; 1083 else if (instance != -1) 1084 instance = -1; 1085 opt_arg++; 1086 break; 1087 case ',': 1088 case '.': 1089 if (instance == -1) 1090 done = TRUE; 1091 else if (targ >= 0) 1092 targ++; 1093 else if (instance >= 0) 1094 instance++; 1095 opt_arg++; 1096 break; 1097 case '\0': 1098 done = TRUE; 1099 break; 1100 default: 1101 tok_end = end; 1102 for (i = 0; tok_list[i]; i++) { 1103 tok_end2 = strchr(opt_arg, tok_list[i]); 1104 if ((tok_end2) && (tok_end2 < tok_end)) 1105 tok_end = tok_end2; 1106 } 1107 callback(callback_arg, instance, targ, 1108 simple_strtol(opt_arg, NULL, 0)); 1109 opt_arg = tok_end; 1110 break; 1111 } 1112 } 1113 return (opt_arg); 1114 } 1115 1116 /* 1117 * Handle Linux boot parameters. This routine allows for assigning a value 1118 * to a parameter with a ':' between the parameter and the value. 1119 * ie. aic79xx=stpwlev:1,extended 1120 */ 1121 static int 1122 aic79xx_setup(char *s) 1123 { 1124 int i, n; 1125 char *p; 1126 char *end; 1127 1128 static const struct { 1129 const char *name; 1130 uint32_t *flag; 1131 } options[] = { 1132 { "extended", &aic79xx_extended }, 1133 { "no_reset", &aic79xx_no_reset }, 1134 { "verbose", &aic79xx_verbose }, 1135 { "allow_memio", &aic79xx_allow_memio}, 1136 #ifdef AHD_DEBUG 1137 { "debug", &ahd_debug }, 1138 #endif 1139 { "periodic_otag", &aic79xx_periodic_otag }, 1140 { "pci_parity", &aic79xx_pci_parity }, 1141 { "seltime", &aic79xx_seltime }, 1142 { "tag_info", NULL }, 1143 { "global_tag_depth", NULL}, 1144 { "slewrate", NULL }, 1145 { "precomp", NULL }, 1146 { "amplitude", NULL }, 1147 { "slowcrc", &aic79xx_slowcrc }, 1148 }; 1149 1150 end = strchr(s, '\0'); 1151 1152 /* 1153 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE 1154 * will never be 0 in this case. 1155 */ 1156 n = 0; 1157 1158 while ((p = strsep(&s, ",.")) != NULL) { 1159 if (*p == '\0') 1160 continue; 1161 for (i = 0; i < ARRAY_SIZE(options); i++) { 1162 1163 n = strlen(options[i].name); 1164 if (strncmp(options[i].name, p, n) == 0) 1165 break; 1166 } 1167 if (i == ARRAY_SIZE(options)) 1168 continue; 1169 1170 if (strncmp(p, "global_tag_depth", n) == 0) { 1171 ahd_linux_setup_tag_info_global(p + n); 1172 } else if (strncmp(p, "tag_info", n) == 0) { 1173 s = ahd_parse_brace_option("tag_info", p + n, end, 1174 2, ahd_linux_setup_tag_info, 0); 1175 } else if (strncmp(p, "slewrate", n) == 0) { 1176 s = ahd_parse_brace_option("slewrate", 1177 p + n, end, 1, ahd_linux_setup_iocell_info, 1178 AIC79XX_SLEWRATE_INDEX); 1179 } else if (strncmp(p, "precomp", n) == 0) { 1180 s = ahd_parse_brace_option("precomp", 1181 p + n, end, 1, ahd_linux_setup_iocell_info, 1182 AIC79XX_PRECOMP_INDEX); 1183 } else if (strncmp(p, "amplitude", n) == 0) { 1184 s = ahd_parse_brace_option("amplitude", 1185 p + n, end, 1, ahd_linux_setup_iocell_info, 1186 AIC79XX_AMPLITUDE_INDEX); 1187 } else if (p[n] == ':') { 1188 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1189 } else if (!strncmp(p, "verbose", n)) { 1190 *(options[i].flag) = 1; 1191 } else { 1192 *(options[i].flag) ^= 0xFFFFFFFF; 1193 } 1194 } 1195 return 1; 1196 } 1197 1198 __setup("aic79xx=", aic79xx_setup); 1199 1200 uint32_t aic79xx_verbose; 1201 1202 int 1203 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template) 1204 { 1205 char buf[80]; 1206 struct Scsi_Host *host; 1207 char *new_name; 1208 u_long s; 1209 int retval; 1210 1211 template->name = ahd->description; 1212 host = scsi_host_alloc(template, sizeof(struct ahd_softc *)); 1213 if (host == NULL) 1214 return (ENOMEM); 1215 1216 *((struct ahd_softc **)host->hostdata) = ahd; 1217 ahd->platform_data->host = host; 1218 host->can_queue = AHD_MAX_QUEUE; 1219 host->cmd_per_lun = 2; 1220 host->sg_tablesize = AHD_NSEG; 1221 host->this_id = ahd->our_id; 1222 host->irq = ahd->platform_data->irq; 1223 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8; 1224 host->max_lun = AHD_NUM_LUNS; 1225 host->max_channel = 0; 1226 host->sg_tablesize = AHD_NSEG; 1227 ahd_lock(ahd, &s); 1228 ahd_set_unit(ahd, ahd_linux_unit++); 1229 ahd_unlock(ahd, &s); 1230 sprintf(buf, "scsi%d", host->host_no); 1231 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC); 1232 if (new_name != NULL) { 1233 strcpy(new_name, buf); 1234 ahd_set_name(ahd, new_name); 1235 } 1236 host->unique_id = ahd->unit; 1237 ahd_linux_initialize_scsi_bus(ahd); 1238 ahd_intr_enable(ahd, TRUE); 1239 1240 host->transportt = ahd_linux_transport_template; 1241 1242 retval = scsi_add_host(host, &ahd->dev_softc->dev); 1243 if (retval) { 1244 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n"); 1245 scsi_host_put(host); 1246 return retval; 1247 } 1248 1249 scsi_scan_host(host); 1250 return 0; 1251 } 1252 1253 /* 1254 * Place the SCSI bus into a known state by either resetting it, 1255 * or forcing transfer negotiations on the next command to any 1256 * target. 1257 */ 1258 static void 1259 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd) 1260 { 1261 u_int target_id; 1262 u_int numtarg; 1263 unsigned long s; 1264 1265 target_id = 0; 1266 numtarg = 0; 1267 1268 if (aic79xx_no_reset != 0) 1269 ahd->flags &= ~AHD_RESET_BUS_A; 1270 1271 if ((ahd->flags & AHD_RESET_BUS_A) != 0) 1272 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE); 1273 else 1274 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8; 1275 1276 ahd_lock(ahd, &s); 1277 1278 /* 1279 * Force negotiation to async for all targets that 1280 * will not see an initial bus reset. 1281 */ 1282 for (; target_id < numtarg; target_id++) { 1283 struct ahd_devinfo devinfo; 1284 struct ahd_initiator_tinfo *tinfo; 1285 struct ahd_tmode_tstate *tstate; 1286 1287 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1288 target_id, &tstate); 1289 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, 1290 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); 1291 ahd_update_neg_request(ahd, &devinfo, tstate, 1292 tinfo, AHD_NEG_ALWAYS); 1293 } 1294 ahd_unlock(ahd, &s); 1295 /* Give the bus some time to recover */ 1296 if ((ahd->flags & AHD_RESET_BUS_A) != 0) { 1297 ahd_freeze_simq(ahd); 1298 msleep(AIC79XX_RESET_DELAY); 1299 ahd_release_simq(ahd); 1300 } 1301 } 1302 1303 int 1304 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg) 1305 { 1306 ahd->platform_data = 1307 kzalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC); 1308 if (ahd->platform_data == NULL) 1309 return (ENOMEM); 1310 ahd->platform_data->irq = AHD_LINUX_NOIRQ; 1311 ahd_lockinit(ahd); 1312 ahd->seltime = (aic79xx_seltime & 0x3) << 4; 1313 return (0); 1314 } 1315 1316 void 1317 ahd_platform_free(struct ahd_softc *ahd) 1318 { 1319 struct scsi_target *starget; 1320 int i; 1321 1322 if (ahd->platform_data != NULL) { 1323 /* destroy all of the device and target objects */ 1324 for (i = 0; i < AHD_NUM_TARGETS; i++) { 1325 starget = ahd->platform_data->starget[i]; 1326 if (starget != NULL) { 1327 ahd->platform_data->starget[i] = NULL; 1328 } 1329 } 1330 1331 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ) 1332 free_irq(ahd->platform_data->irq, ahd); 1333 if (ahd->tags[0] == BUS_SPACE_PIO 1334 && ahd->bshs[0].ioport != 0) 1335 release_region(ahd->bshs[0].ioport, 256); 1336 if (ahd->tags[1] == BUS_SPACE_PIO 1337 && ahd->bshs[1].ioport != 0) 1338 release_region(ahd->bshs[1].ioport, 256); 1339 if (ahd->tags[0] == BUS_SPACE_MEMIO 1340 && ahd->bshs[0].maddr != NULL) { 1341 iounmap(ahd->bshs[0].maddr); 1342 release_mem_region(ahd->platform_data->mem_busaddr, 1343 0x1000); 1344 } 1345 if (ahd->platform_data->host) 1346 scsi_host_put(ahd->platform_data->host); 1347 1348 kfree(ahd->platform_data); 1349 } 1350 } 1351 1352 void 1353 ahd_platform_init(struct ahd_softc *ahd) 1354 { 1355 /* 1356 * Lookup and commit any modified IO Cell options. 1357 */ 1358 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 1359 const struct ahd_linux_iocell_opts *iocell_opts; 1360 1361 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 1362 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP) 1363 AHD_SET_PRECOMP(ahd, iocell_opts->precomp); 1364 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE) 1365 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate); 1366 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE) 1367 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude); 1368 } 1369 1370 } 1371 1372 void 1373 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb) 1374 { 1375 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), 1376 SCB_GET_CHANNEL(ahd, scb), 1377 SCB_GET_LUN(scb), SCB_LIST_NULL, 1378 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1379 } 1380 1381 void 1382 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev, 1383 struct ahd_devinfo *devinfo, ahd_queue_alg alg) 1384 { 1385 struct ahd_linux_device *dev; 1386 int was_queuing; 1387 int now_queuing; 1388 1389 if (sdev == NULL) 1390 return; 1391 1392 dev = scsi_transport_device_data(sdev); 1393 1394 if (dev == NULL) 1395 return; 1396 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED); 1397 switch (alg) { 1398 default: 1399 case AHD_QUEUE_NONE: 1400 now_queuing = 0; 1401 break; 1402 case AHD_QUEUE_BASIC: 1403 now_queuing = AHD_DEV_Q_BASIC; 1404 break; 1405 case AHD_QUEUE_TAGGED: 1406 now_queuing = AHD_DEV_Q_TAGGED; 1407 break; 1408 } 1409 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0 1410 && (was_queuing != now_queuing) 1411 && (dev->active != 0)) { 1412 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY; 1413 dev->qfrozen++; 1414 } 1415 1416 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG); 1417 if (now_queuing) { 1418 u_int usertags; 1419 1420 usertags = ahd_linux_user_tagdepth(ahd, devinfo); 1421 if (!was_queuing) { 1422 /* 1423 * Start out aggressively and allow our 1424 * dynamic queue depth algorithm to take 1425 * care of the rest. 1426 */ 1427 dev->maxtags = usertags; 1428 dev->openings = dev->maxtags - dev->active; 1429 } 1430 if (dev->maxtags == 0) { 1431 /* 1432 * Queueing is disabled by the user. 1433 */ 1434 dev->openings = 1; 1435 } else if (alg == AHD_QUEUE_TAGGED) { 1436 dev->flags |= AHD_DEV_Q_TAGGED; 1437 if (aic79xx_periodic_otag != 0) 1438 dev->flags |= AHD_DEV_PERIODIC_OTAG; 1439 } else 1440 dev->flags |= AHD_DEV_Q_BASIC; 1441 } else { 1442 /* We can only have one opening. */ 1443 dev->maxtags = 0; 1444 dev->openings = 1 - dev->active; 1445 } 1446 1447 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) { 1448 case AHD_DEV_Q_BASIC: 1449 case AHD_DEV_Q_TAGGED: 1450 scsi_change_queue_depth(sdev, 1451 dev->openings + dev->active); 1452 break; 1453 default: 1454 /* 1455 * We allow the OS to queue 2 untagged transactions to 1456 * us at any time even though we can only execute them 1457 * serially on the controller/device. This should 1458 * remove some latency. 1459 */ 1460 scsi_change_queue_depth(sdev, 1); 1461 break; 1462 } 1463 } 1464 1465 int 1466 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel, 1467 int lun, u_int tag, role_t role, uint32_t status) 1468 { 1469 return 0; 1470 } 1471 1472 static u_int 1473 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) 1474 { 1475 static int warned_user; 1476 u_int tags; 1477 1478 tags = 0; 1479 if ((ahd->user_discenable & devinfo->target_mask) != 0) { 1480 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) { 1481 1482 if (warned_user == 0) { 1483 printk(KERN_WARNING 1484 "aic79xx: WARNING: Insufficient tag_info instances\n" 1485 "aic79xx: for installed controllers. Using defaults\n" 1486 "aic79xx: Please update the aic79xx_tag_info array in\n" 1487 "aic79xx: the aic79xx_osm.c source file.\n"); 1488 warned_user++; 1489 } 1490 tags = AHD_MAX_QUEUE; 1491 } else { 1492 adapter_tag_info_t *tag_info; 1493 1494 tag_info = &aic79xx_tag_info[ahd->unit]; 1495 tags = tag_info->tag_commands[devinfo->target_offset]; 1496 if (tags > AHD_MAX_QUEUE) 1497 tags = AHD_MAX_QUEUE; 1498 } 1499 } 1500 return (tags); 1501 } 1502 1503 /* 1504 * Determines the queue depth for a given device. 1505 */ 1506 static void 1507 ahd_linux_device_queue_depth(struct scsi_device *sdev) 1508 { 1509 struct ahd_devinfo devinfo; 1510 u_int tags; 1511 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata); 1512 1513 ahd_compile_devinfo(&devinfo, 1514 ahd->our_id, 1515 sdev->sdev_target->id, sdev->lun, 1516 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1517 ROLE_INITIATOR); 1518 tags = ahd_linux_user_tagdepth(ahd, &devinfo); 1519 if (tags != 0 && sdev->tagged_supported != 0) { 1520 1521 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED); 1522 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1523 devinfo.lun, AC_TRANSFER_NEG); 1524 ahd_print_devinfo(ahd, &devinfo); 1525 printk("Tagged Queuing enabled. Depth %d\n", tags); 1526 } else { 1527 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE); 1528 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1529 devinfo.lun, AC_TRANSFER_NEG); 1530 } 1531 } 1532 1533 static int 1534 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev, 1535 struct scsi_cmnd *cmd) 1536 { 1537 struct scb *scb; 1538 struct hardware_scb *hscb; 1539 struct ahd_initiator_tinfo *tinfo; 1540 struct ahd_tmode_tstate *tstate; 1541 u_int col_idx; 1542 uint16_t mask; 1543 unsigned long flags; 1544 int nseg; 1545 1546 nseg = scsi_dma_map(cmd); 1547 if (nseg < 0) 1548 return SCSI_MLQUEUE_HOST_BUSY; 1549 1550 ahd_lock(ahd, &flags); 1551 1552 /* 1553 * Get an scb to use. 1554 */ 1555 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1556 cmd->device->id, &tstate); 1557 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0 1558 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 1559 col_idx = AHD_NEVER_COL_IDX; 1560 } else { 1561 col_idx = AHD_BUILD_COL_IDX(cmd->device->id, 1562 cmd->device->lun); 1563 } 1564 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) { 1565 ahd->flags |= AHD_RESOURCE_SHORTAGE; 1566 ahd_unlock(ahd, &flags); 1567 scsi_dma_unmap(cmd); 1568 return SCSI_MLQUEUE_HOST_BUSY; 1569 } 1570 1571 scb->io_ctx = cmd; 1572 scb->platform_data->dev = dev; 1573 hscb = scb->hscb; 1574 cmd->host_scribble = (char *)scb; 1575 1576 /* 1577 * Fill out basics of the HSCB. 1578 */ 1579 hscb->control = 0; 1580 hscb->scsiid = BUILD_SCSIID(ahd, cmd); 1581 hscb->lun = cmd->device->lun; 1582 scb->hscb->task_management = 0; 1583 mask = SCB_GET_TARGET_MASK(ahd, scb); 1584 1585 if ((ahd->user_discenable & mask) != 0) 1586 hscb->control |= DISCENB; 1587 1588 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) 1589 scb->flags |= SCB_PACKETIZED; 1590 1591 if ((tstate->auto_negotiate & mask) != 0) { 1592 scb->flags |= SCB_AUTO_NEGOTIATE; 1593 scb->hscb->control |= MK_MESSAGE; 1594 } 1595 1596 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) { 1597 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH 1598 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) { 1599 hscb->control |= ORDERED_QUEUE_TAG; 1600 dev->commands_since_idle_or_otag = 0; 1601 } else { 1602 hscb->control |= SIMPLE_QUEUE_TAG; 1603 } 1604 } 1605 1606 hscb->cdb_len = cmd->cmd_len; 1607 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len); 1608 1609 scb->platform_data->xfer_len = 0; 1610 ahd_set_residual(scb, 0); 1611 ahd_set_sense_residual(scb, 0); 1612 scb->sg_count = 0; 1613 1614 if (nseg > 0) { 1615 void *sg = scb->sg_list; 1616 struct scatterlist *cur_seg; 1617 int i; 1618 1619 scb->platform_data->xfer_len = 0; 1620 1621 scsi_for_each_sg(cmd, cur_seg, nseg, i) { 1622 dma_addr_t addr; 1623 bus_size_t len; 1624 1625 addr = sg_dma_address(cur_seg); 1626 len = sg_dma_len(cur_seg); 1627 scb->platform_data->xfer_len += len; 1628 sg = ahd_sg_setup(ahd, scb, sg, addr, len, 1629 i == (nseg - 1)); 1630 } 1631 } 1632 1633 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); 1634 dev->openings--; 1635 dev->active++; 1636 dev->commands_issued++; 1637 1638 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0) 1639 dev->commands_since_idle_or_otag++; 1640 scb->flags |= SCB_ACTIVE; 1641 ahd_queue_scb(ahd, scb); 1642 1643 ahd_unlock(ahd, &flags); 1644 1645 return 0; 1646 } 1647 1648 /* 1649 * SCSI controller interrupt handler. 1650 */ 1651 irqreturn_t 1652 ahd_linux_isr(int irq, void *dev_id) 1653 { 1654 struct ahd_softc *ahd; 1655 u_long flags; 1656 int ours; 1657 1658 ahd = (struct ahd_softc *) dev_id; 1659 ahd_lock(ahd, &flags); 1660 ours = ahd_intr(ahd); 1661 ahd_unlock(ahd, &flags); 1662 return IRQ_RETVAL(ours); 1663 } 1664 1665 void 1666 ahd_send_async(struct ahd_softc *ahd, char channel, 1667 u_int target, u_int lun, ac_code code) 1668 { 1669 switch (code) { 1670 case AC_TRANSFER_NEG: 1671 { 1672 struct scsi_target *starget; 1673 struct ahd_initiator_tinfo *tinfo; 1674 struct ahd_tmode_tstate *tstate; 1675 unsigned int target_ppr_options; 1676 1677 BUG_ON(target == CAM_TARGET_WILDCARD); 1678 1679 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 1680 target, &tstate); 1681 1682 /* 1683 * Don't bother reporting results while 1684 * negotiations are still pending. 1685 */ 1686 if (tinfo->curr.period != tinfo->goal.period 1687 || tinfo->curr.width != tinfo->goal.width 1688 || tinfo->curr.offset != tinfo->goal.offset 1689 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1690 if (bootverbose == 0) 1691 break; 1692 1693 /* 1694 * Don't bother reporting results that 1695 * are identical to those last reported. 1696 */ 1697 starget = ahd->platform_data->starget[target]; 1698 if (starget == NULL) 1699 break; 1700 1701 target_ppr_options = 1702 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1703 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1704 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0) 1705 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0) 1706 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0) 1707 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0) 1708 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0) 1709 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0); 1710 1711 if (tinfo->curr.period == spi_period(starget) 1712 && tinfo->curr.width == spi_width(starget) 1713 && tinfo->curr.offset == spi_offset(starget) 1714 && tinfo->curr.ppr_options == target_ppr_options) 1715 if (bootverbose == 0) 1716 break; 1717 1718 spi_period(starget) = tinfo->curr.period; 1719 spi_width(starget) = tinfo->curr.width; 1720 spi_offset(starget) = tinfo->curr.offset; 1721 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1722 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1723 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1724 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0; 1725 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0; 1726 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0; 1727 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0; 1728 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0; 1729 spi_display_xfer_agreement(starget); 1730 break; 1731 } 1732 case AC_SENT_BDR: 1733 { 1734 WARN_ON(lun != CAM_LUN_WILDCARD); 1735 scsi_report_device_reset(ahd->platform_data->host, 1736 channel - 'A', target); 1737 break; 1738 } 1739 case AC_BUS_RESET: 1740 if (ahd->platform_data->host != NULL) { 1741 scsi_report_bus_reset(ahd->platform_data->host, 1742 channel - 'A'); 1743 } 1744 break; 1745 default: 1746 panic("ahd_send_async: Unexpected async event"); 1747 } 1748 } 1749 1750 /* 1751 * Calls the higher level scsi done function and frees the scb. 1752 */ 1753 void 1754 ahd_done(struct ahd_softc *ahd, struct scb *scb) 1755 { 1756 struct scsi_cmnd *cmd; 1757 struct ahd_linux_device *dev; 1758 1759 if ((scb->flags & SCB_ACTIVE) == 0) { 1760 printk("SCB %d done'd twice\n", SCB_GET_TAG(scb)); 1761 ahd_dump_card_state(ahd); 1762 panic("Stopping for safety"); 1763 } 1764 LIST_REMOVE(scb, pending_links); 1765 cmd = scb->io_ctx; 1766 dev = scb->platform_data->dev; 1767 dev->active--; 1768 dev->openings++; 1769 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1770 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1771 dev->qfrozen--; 1772 } 1773 ahd_linux_unmap_scb(ahd, scb); 1774 1775 /* 1776 * Guard against stale sense data. 1777 * The Linux mid-layer assumes that sense 1778 * was retrieved anytime the first byte of 1779 * the sense buffer looks "sane". 1780 */ 1781 cmd->sense_buffer[0] = 0; 1782 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) { 1783 #ifdef AHD_REPORT_UNDERFLOWS 1784 uint32_t amount_xferred; 1785 1786 amount_xferred = 1787 ahd_get_transfer_length(scb) - ahd_get_residual(scb); 1788 #endif 1789 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1790 #ifdef AHD_DEBUG 1791 if ((ahd_debug & AHD_SHOW_MISC) != 0) { 1792 ahd_print_path(ahd, scb); 1793 printk("Set CAM_UNCOR_PARITY\n"); 1794 } 1795 #endif 1796 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY); 1797 #ifdef AHD_REPORT_UNDERFLOWS 1798 /* 1799 * This code is disabled by default as some 1800 * clients of the SCSI system do not properly 1801 * initialize the underflow parameter. This 1802 * results in spurious termination of commands 1803 * that complete as expected (e.g. underflow is 1804 * allowed as command can return variable amounts 1805 * of data. 1806 */ 1807 } else if (amount_xferred < scb->io_ctx->underflow) { 1808 u_int i; 1809 1810 ahd_print_path(ahd, scb); 1811 printk("CDB:"); 1812 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1813 printk(" 0x%x", scb->io_ctx->cmnd[i]); 1814 printk("\n"); 1815 ahd_print_path(ahd, scb); 1816 printk("Saw underflow (%ld of %ld bytes). " 1817 "Treated as error\n", 1818 ahd_get_residual(scb), 1819 ahd_get_transfer_length(scb)); 1820 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1821 #endif 1822 } else { 1823 ahd_set_transaction_status(scb, CAM_REQ_CMP); 1824 } 1825 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1826 ahd_linux_handle_scsi_status(ahd, cmd->device, scb); 1827 } 1828 1829 if (dev->openings == 1 1830 && ahd_get_transaction_status(scb) == CAM_REQ_CMP 1831 && ahd_get_scsi_status(scb) != SAM_STAT_TASK_SET_FULL) 1832 dev->tag_success_count++; 1833 /* 1834 * Some devices deal with temporary internal resource 1835 * shortages by returning queue full. When the queue 1836 * full occurrs, we throttle back. Slowly try to get 1837 * back to our previous queue depth. 1838 */ 1839 if ((dev->openings + dev->active) < dev->maxtags 1840 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) { 1841 dev->tag_success_count = 0; 1842 dev->openings++; 1843 } 1844 1845 if (dev->active == 0) 1846 dev->commands_since_idle_or_otag = 0; 1847 1848 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1849 printk("Recovery SCB completes\n"); 1850 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT 1851 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED) 1852 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1853 1854 if (ahd->platform_data->eh_done) 1855 complete(ahd->platform_data->eh_done); 1856 } 1857 1858 ahd_free_scb(ahd, scb); 1859 ahd_linux_queue_cmd_complete(ahd, cmd); 1860 } 1861 1862 static void 1863 ahd_linux_handle_scsi_status(struct ahd_softc *ahd, 1864 struct scsi_device *sdev, struct scb *scb) 1865 { 1866 struct ahd_devinfo devinfo; 1867 struct ahd_linux_device *dev = scsi_transport_device_data(sdev); 1868 1869 ahd_compile_devinfo(&devinfo, 1870 ahd->our_id, 1871 sdev->sdev_target->id, sdev->lun, 1872 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1873 ROLE_INITIATOR); 1874 1875 /* 1876 * We don't currently trust the mid-layer to 1877 * properly deal with queue full or busy. So, 1878 * when one occurs, we tell the mid-layer to 1879 * unconditionally requeue the command to us 1880 * so that we can retry it ourselves. We also 1881 * implement our own throttling mechanism so 1882 * we don't clobber the device with too many 1883 * commands. 1884 */ 1885 switch (ahd_get_scsi_status(scb)) { 1886 default: 1887 break; 1888 case SAM_STAT_CHECK_CONDITION: 1889 case SAM_STAT_COMMAND_TERMINATED: 1890 { 1891 struct scsi_cmnd *cmd; 1892 1893 /* 1894 * Copy sense information to the OS's cmd 1895 * structure if it is available. 1896 */ 1897 cmd = scb->io_ctx; 1898 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) { 1899 struct scsi_status_iu_header *siu; 1900 u_int sense_size; 1901 u_int sense_offset; 1902 1903 if (scb->flags & SCB_SENSE) { 1904 sense_size = min(sizeof(struct scsi_sense_data) 1905 - ahd_get_sense_residual(scb), 1906 (u_long)SCSI_SENSE_BUFFERSIZE); 1907 sense_offset = 0; 1908 } else { 1909 /* 1910 * Copy only the sense data into the provided 1911 * buffer. 1912 */ 1913 siu = (struct scsi_status_iu_header *) 1914 scb->sense_data; 1915 sense_size = min_t(size_t, 1916 scsi_4btoul(siu->sense_length), 1917 SCSI_SENSE_BUFFERSIZE); 1918 sense_offset = SIU_SENSE_OFFSET(siu); 1919 } 1920 1921 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1922 memcpy(cmd->sense_buffer, 1923 ahd_get_sense_buf(ahd, scb) 1924 + sense_offset, sense_size); 1925 set_status_byte(cmd, SAM_STAT_CHECK_CONDITION); 1926 1927 #ifdef AHD_DEBUG 1928 if (ahd_debug & AHD_SHOW_SENSE) { 1929 int i; 1930 1931 printk("Copied %d bytes of sense data at %d:", 1932 sense_size, sense_offset); 1933 for (i = 0; i < sense_size; i++) { 1934 if ((i & 0xF) == 0) 1935 printk("\n"); 1936 printk("0x%x ", cmd->sense_buffer[i]); 1937 } 1938 printk("\n"); 1939 } 1940 #endif 1941 } 1942 break; 1943 } 1944 case SAM_STAT_TASK_SET_FULL: 1945 /* 1946 * By the time the core driver has returned this 1947 * command, all other commands that were queued 1948 * to us but not the device have been returned. 1949 * This ensures that dev->active is equal to 1950 * the number of commands actually queued to 1951 * the device. 1952 */ 1953 dev->tag_success_count = 0; 1954 if (dev->active != 0) { 1955 /* 1956 * Drop our opening count to the number 1957 * of commands currently outstanding. 1958 */ 1959 dev->openings = 0; 1960 #ifdef AHD_DEBUG 1961 if ((ahd_debug & AHD_SHOW_QFULL) != 0) { 1962 ahd_print_path(ahd, scb); 1963 printk("Dropping tag count to %d\n", 1964 dev->active); 1965 } 1966 #endif 1967 if (dev->active == dev->tags_on_last_queuefull) { 1968 1969 dev->last_queuefull_same_count++; 1970 /* 1971 * If we repeatedly see a queue full 1972 * at the same queue depth, this 1973 * device has a fixed number of tag 1974 * slots. Lock in this tag depth 1975 * so we stop seeing queue fulls from 1976 * this device. 1977 */ 1978 if (dev->last_queuefull_same_count 1979 == AHD_LOCK_TAGS_COUNT) { 1980 dev->maxtags = dev->active; 1981 ahd_print_path(ahd, scb); 1982 printk("Locking max tag count at %d\n", 1983 dev->active); 1984 } 1985 } else { 1986 dev->tags_on_last_queuefull = dev->active; 1987 dev->last_queuefull_same_count = 0; 1988 } 1989 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); 1990 ahd_set_scsi_status(scb, SAM_STAT_GOOD); 1991 ahd_platform_set_tags(ahd, sdev, &devinfo, 1992 (dev->flags & AHD_DEV_Q_BASIC) 1993 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 1994 break; 1995 } 1996 /* 1997 * Drop down to a single opening, and treat this 1998 * as if the target returned BUSY SCSI status. 1999 */ 2000 dev->openings = 1; 2001 ahd_platform_set_tags(ahd, sdev, &devinfo, 2002 (dev->flags & AHD_DEV_Q_BASIC) 2003 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 2004 ahd_set_scsi_status(scb, SAM_STAT_BUSY); 2005 } 2006 } 2007 2008 static void 2009 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd) 2010 { 2011 int status; 2012 int new_status = DID_OK; 2013 int do_fallback = 0; 2014 int scsi_status; 2015 struct scsi_sense_data *sense; 2016 2017 /* 2018 * Map CAM error codes into Linux Error codes. We 2019 * avoid the conversion so that the DV code has the 2020 * full error information available when making 2021 * state change decisions. 2022 */ 2023 2024 status = ahd_cmd_get_transaction_status(cmd); 2025 switch (status) { 2026 case CAM_REQ_INPROG: 2027 case CAM_REQ_CMP: 2028 new_status = DID_OK; 2029 break; 2030 case CAM_AUTOSENSE_FAIL: 2031 new_status = DID_ERROR; 2032 fallthrough; 2033 case CAM_SCSI_STATUS_ERROR: 2034 scsi_status = ahd_cmd_get_scsi_status(cmd); 2035 2036 switch(scsi_status) { 2037 case SAM_STAT_COMMAND_TERMINATED: 2038 case SAM_STAT_CHECK_CONDITION: 2039 sense = (struct scsi_sense_data *) 2040 cmd->sense_buffer; 2041 if (sense->extra_len >= 5 && 2042 (sense->add_sense_code == 0x47 2043 || sense->add_sense_code == 0x48)) 2044 do_fallback = 1; 2045 break; 2046 default: 2047 break; 2048 } 2049 break; 2050 case CAM_REQ_ABORTED: 2051 new_status = DID_ABORT; 2052 break; 2053 case CAM_BUSY: 2054 new_status = DID_BUS_BUSY; 2055 break; 2056 case CAM_REQ_INVALID: 2057 case CAM_PATH_INVALID: 2058 new_status = DID_BAD_TARGET; 2059 break; 2060 case CAM_SEL_TIMEOUT: 2061 new_status = DID_NO_CONNECT; 2062 break; 2063 case CAM_SCSI_BUS_RESET: 2064 case CAM_BDR_SENT: 2065 new_status = DID_RESET; 2066 break; 2067 case CAM_UNCOR_PARITY: 2068 new_status = DID_PARITY; 2069 do_fallback = 1; 2070 break; 2071 case CAM_CMD_TIMEOUT: 2072 new_status = DID_TIME_OUT; 2073 do_fallback = 1; 2074 break; 2075 case CAM_REQ_CMP_ERR: 2076 case CAM_UNEXP_BUSFREE: 2077 case CAM_DATA_RUN_ERR: 2078 new_status = DID_ERROR; 2079 do_fallback = 1; 2080 break; 2081 case CAM_UA_ABORT: 2082 case CAM_NO_HBA: 2083 case CAM_SEQUENCE_FAIL: 2084 case CAM_CCB_LEN_ERR: 2085 case CAM_PROVIDE_FAIL: 2086 case CAM_REQ_TERMIO: 2087 case CAM_UNREC_HBA_ERROR: 2088 case CAM_REQ_TOO_BIG: 2089 new_status = DID_ERROR; 2090 break; 2091 case CAM_REQUEUE_REQ: 2092 new_status = DID_REQUEUE; 2093 break; 2094 default: 2095 /* We should never get here */ 2096 new_status = DID_ERROR; 2097 break; 2098 } 2099 2100 if (do_fallback) { 2101 printk("%s: device overrun (status %x) on %d:%d:%d\n", 2102 ahd_name(ahd), status, cmd->device->channel, 2103 cmd->device->id, (u8)cmd->device->lun); 2104 } 2105 2106 ahd_cmd_set_transaction_status(cmd, new_status); 2107 2108 scsi_done(cmd); 2109 } 2110 2111 static void 2112 ahd_freeze_simq(struct ahd_softc *ahd) 2113 { 2114 scsi_block_requests(ahd->platform_data->host); 2115 } 2116 2117 static void 2118 ahd_release_simq(struct ahd_softc *ahd) 2119 { 2120 scsi_unblock_requests(ahd->platform_data->host); 2121 } 2122 2123 static int 2124 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd) 2125 { 2126 struct ahd_softc *ahd; 2127 struct ahd_linux_device *dev; 2128 struct scb *pending_scb; 2129 u_int saved_scbptr; 2130 u_int active_scbptr; 2131 u_int last_phase; 2132 u_int cdb_byte; 2133 int retval = SUCCESS; 2134 int was_paused; 2135 int paused; 2136 int wait; 2137 int disconnected; 2138 ahd_mode_state saved_modes; 2139 unsigned long flags; 2140 2141 pending_scb = NULL; 2142 paused = FALSE; 2143 wait = FALSE; 2144 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 2145 2146 scmd_printk(KERN_INFO, cmd, 2147 "Attempting to queue an ABORT message:"); 2148 2149 printk("CDB:"); 2150 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2151 printk(" 0x%x", cmd->cmnd[cdb_byte]); 2152 printk("\n"); 2153 2154 ahd_lock(ahd, &flags); 2155 2156 /* 2157 * First determine if we currently own this command. 2158 * Start by searching the device queue. If not found 2159 * there, check the pending_scb list. If not found 2160 * at all, and the system wanted us to just abort the 2161 * command, return success. 2162 */ 2163 dev = scsi_transport_device_data(cmd->device); 2164 2165 if (dev == NULL) { 2166 /* 2167 * No target device for this command exists, 2168 * so we must not still own the command. 2169 */ 2170 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 2171 goto done; 2172 } 2173 2174 /* 2175 * See if we can find a matching cmd in the pending list. 2176 */ 2177 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { 2178 if (pending_scb->io_ctx == cmd) 2179 break; 2180 } 2181 2182 if (pending_scb == NULL) { 2183 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2184 goto done; 2185 } 2186 2187 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2188 /* 2189 * We can't queue two recovery actions using the same SCB 2190 */ 2191 retval = FAILED; 2192 goto done; 2193 } 2194 2195 /* 2196 * Ensure that the card doesn't do anything 2197 * behind our back. Also make sure that we 2198 * didn't "just" miss an interrupt that would 2199 * affect this cmd. 2200 */ 2201 was_paused = ahd_is_paused(ahd); 2202 ahd_pause_and_flushwork(ahd); 2203 paused = TRUE; 2204 2205 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2206 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2207 goto done; 2208 } 2209 2210 printk("%s: At time of recovery, card was %spaused\n", 2211 ahd_name(ahd), was_paused ? "" : "not "); 2212 ahd_dump_card_state(ahd); 2213 2214 disconnected = TRUE; 2215 if (ahd_search_qinfifo(ahd, cmd->device->id, 2216 cmd->device->channel + 'A', 2217 cmd->device->lun, 2218 pending_scb->hscb->tag, 2219 ROLE_INITIATOR, CAM_REQ_ABORTED, 2220 SEARCH_COMPLETE) > 0) { 2221 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2222 ahd_name(ahd), cmd->device->channel, 2223 cmd->device->id, (u8)cmd->device->lun); 2224 goto done; 2225 } 2226 2227 saved_modes = ahd_save_modes(ahd); 2228 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); 2229 last_phase = ahd_inb(ahd, LASTPHASE); 2230 saved_scbptr = ahd_get_scbptr(ahd); 2231 active_scbptr = saved_scbptr; 2232 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2233 struct scb *bus_scb; 2234 2235 bus_scb = ahd_lookup_scb(ahd, active_scbptr); 2236 if (bus_scb == pending_scb) 2237 disconnected = FALSE; 2238 } 2239 2240 /* 2241 * At this point, pending_scb is the scb associated with the 2242 * passed in command. That command is currently active on the 2243 * bus or is in the disconnected state. 2244 */ 2245 ahd_inb(ahd, SAVED_SCSIID); 2246 if (last_phase != P_BUSFREE 2247 && SCB_GET_TAG(pending_scb) == active_scbptr) { 2248 2249 /* 2250 * We're active on the bus, so assert ATN 2251 * and hope that the target responds. 2252 */ 2253 pending_scb = ahd_lookup_scb(ahd, active_scbptr); 2254 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2255 ahd_outb(ahd, MSG_OUT, HOST_MSG); 2256 ahd_outb(ahd, SCSISIGO, last_phase|ATNO); 2257 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2258 wait = TRUE; 2259 } else if (disconnected) { 2260 2261 /* 2262 * Actually re-queue this SCB in an attempt 2263 * to select the device before it reconnects. 2264 */ 2265 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2266 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb)); 2267 pending_scb->hscb->cdb_len = 0; 2268 pending_scb->hscb->task_attribute = 0; 2269 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK; 2270 2271 if ((pending_scb->flags & SCB_PACKETIZED) != 0) { 2272 /* 2273 * Mark the SCB has having an outstanding 2274 * task management function. Should the command 2275 * complete normally before the task management 2276 * function can be sent, the host will be notified 2277 * to abort our requeued SCB. 2278 */ 2279 ahd_outb(ahd, SCB_TASK_MANAGEMENT, 2280 pending_scb->hscb->task_management); 2281 } else { 2282 /* 2283 * If non-packetized, set the MK_MESSAGE control 2284 * bit indicating that we desire to send a message. 2285 * We also set the disconnected flag since there is 2286 * no guarantee that our SCB control byte matches 2287 * the version on the card. We don't want the 2288 * sequencer to abort the command thinking an 2289 * unsolicited reselection occurred. 2290 */ 2291 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2292 2293 /* 2294 * The sequencer will never re-reference the 2295 * in-core SCB. To make sure we are notified 2296 * during reselection, set the MK_MESSAGE flag in 2297 * the card's copy of the SCB. 2298 */ 2299 ahd_outb(ahd, SCB_CONTROL, 2300 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE); 2301 } 2302 2303 /* 2304 * Clear out any entries in the QINFIFO first 2305 * so we are the next SCB for this target 2306 * to run. 2307 */ 2308 ahd_search_qinfifo(ahd, cmd->device->id, 2309 cmd->device->channel + 'A', cmd->device->lun, 2310 SCB_LIST_NULL, ROLE_INITIATOR, 2311 CAM_REQUEUE_REQ, SEARCH_COMPLETE); 2312 ahd_qinfifo_requeue_tail(ahd, pending_scb); 2313 ahd_set_scbptr(ahd, saved_scbptr); 2314 ahd_print_path(ahd, pending_scb); 2315 printk("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 } 2321 2322 2323 ahd_restore_modes(ahd, saved_modes); 2324 done: 2325 if (paused) 2326 ahd_unpause(ahd); 2327 if (wait) { 2328 DECLARE_COMPLETION_ONSTACK(done); 2329 2330 ahd->platform_data->eh_done = &done; 2331 ahd_unlock(ahd, &flags); 2332 2333 printk("%s: Recovery code sleeping\n", ahd_name(ahd)); 2334 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2335 ahd_lock(ahd, &flags); 2336 ahd->platform_data->eh_done = NULL; 2337 ahd_unlock(ahd, &flags); 2338 printk("%s: Timer Expired (active %d)\n", 2339 ahd_name(ahd), dev->active); 2340 retval = FAILED; 2341 } 2342 printk("Recovery code awake\n"); 2343 } else 2344 ahd_unlock(ahd, &flags); 2345 2346 if (retval != SUCCESS) 2347 printk("%s: Command abort returning 0x%x\n", 2348 ahd_name(ahd), retval); 2349 2350 return retval; 2351 } 2352 2353 static void ahd_linux_set_width(struct scsi_target *starget, int width) 2354 { 2355 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2356 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2357 struct ahd_devinfo devinfo; 2358 unsigned long flags; 2359 2360 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2361 starget->channel + 'A', ROLE_INITIATOR); 2362 ahd_lock(ahd, &flags); 2363 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE); 2364 ahd_unlock(ahd, &flags); 2365 } 2366 2367 static void ahd_linux_set_period(struct scsi_target *starget, int period) 2368 { 2369 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2370 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2371 struct ahd_tmode_tstate *tstate; 2372 struct ahd_initiator_tinfo *tinfo 2373 = ahd_fetch_transinfo(ahd, 2374 starget->channel + 'A', 2375 shost->this_id, starget->id, &tstate); 2376 struct ahd_devinfo devinfo; 2377 unsigned int ppr_options = tinfo->goal.ppr_options; 2378 unsigned int dt; 2379 unsigned long flags; 2380 unsigned long offset = tinfo->goal.offset; 2381 2382 #ifdef AHD_DEBUG 2383 if ((ahd_debug & AHD_SHOW_DV) != 0) 2384 printk("%s: set period to %d\n", ahd_name(ahd), period); 2385 #endif 2386 if (offset == 0) 2387 offset = MAX_OFFSET; 2388 2389 if (period < 8) 2390 period = 8; 2391 if (period < 10) { 2392 if (spi_max_width(starget)) { 2393 ppr_options |= MSG_EXT_PPR_DT_REQ; 2394 if (period == 8) 2395 ppr_options |= MSG_EXT_PPR_IU_REQ; 2396 } else 2397 period = 10; 2398 } 2399 2400 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2401 2402 ahd_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 ahd_find_syncrate(ahd, &period, &ppr_options, 2412 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2413 2414 ahd_lock(ahd, &flags); 2415 ahd_set_syncrate(ahd, &devinfo, period, offset, 2416 ppr_options, AHD_TRANS_GOAL, FALSE); 2417 ahd_unlock(ahd, &flags); 2418 } 2419 2420 static void ahd_linux_set_offset(struct scsi_target *starget, int offset) 2421 { 2422 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2423 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2424 struct ahd_tmode_tstate *tstate; 2425 struct ahd_initiator_tinfo *tinfo 2426 = ahd_fetch_transinfo(ahd, 2427 starget->channel + 'A', 2428 shost->this_id, starget->id, &tstate); 2429 struct ahd_devinfo devinfo; 2430 unsigned int ppr_options = 0; 2431 unsigned int period = 0; 2432 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2433 unsigned long flags; 2434 2435 #ifdef AHD_DEBUG 2436 if ((ahd_debug & AHD_SHOW_DV) != 0) 2437 printk("%s: set offset to %d\n", ahd_name(ahd), offset); 2438 #endif 2439 2440 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2441 starget->channel + 'A', ROLE_INITIATOR); 2442 if (offset != 0) { 2443 period = tinfo->goal.period; 2444 ppr_options = tinfo->goal.ppr_options; 2445 ahd_find_syncrate(ahd, &period, &ppr_options, 2446 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2447 } 2448 2449 ahd_lock(ahd, &flags); 2450 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options, 2451 AHD_TRANS_GOAL, FALSE); 2452 ahd_unlock(ahd, &flags); 2453 } 2454 2455 static void ahd_linux_set_dt(struct scsi_target *starget, int dt) 2456 { 2457 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2458 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2459 struct ahd_tmode_tstate *tstate; 2460 struct ahd_initiator_tinfo *tinfo 2461 = ahd_fetch_transinfo(ahd, 2462 starget->channel + 'A', 2463 shost->this_id, starget->id, &tstate); 2464 struct ahd_devinfo devinfo; 2465 unsigned int ppr_options = tinfo->goal.ppr_options 2466 & ~MSG_EXT_PPR_DT_REQ; 2467 unsigned int period = tinfo->goal.period; 2468 unsigned int width = tinfo->goal.width; 2469 unsigned long flags; 2470 2471 #ifdef AHD_DEBUG 2472 if ((ahd_debug & AHD_SHOW_DV) != 0) 2473 printk("%s: %s DT\n", ahd_name(ahd), 2474 dt ? "enabling" : "disabling"); 2475 #endif 2476 if (dt && spi_max_width(starget)) { 2477 ppr_options |= MSG_EXT_PPR_DT_REQ; 2478 if (!width) 2479 ahd_linux_set_width(starget, 1); 2480 } else { 2481 if (period <= 9) 2482 period = 10; /* If resetting DT, period must be >= 25ns */ 2483 /* IU is invalid without DT set */ 2484 ppr_options &= ~MSG_EXT_PPR_IU_REQ; 2485 } 2486 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2487 starget->channel + 'A', ROLE_INITIATOR); 2488 ahd_find_syncrate(ahd, &period, &ppr_options, 2489 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2490 2491 ahd_lock(ahd, &flags); 2492 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2493 ppr_options, AHD_TRANS_GOAL, FALSE); 2494 ahd_unlock(ahd, &flags); 2495 } 2496 2497 static void ahd_linux_set_qas(struct scsi_target *starget, int qas) 2498 { 2499 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2500 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2501 struct ahd_tmode_tstate *tstate; 2502 struct ahd_initiator_tinfo *tinfo 2503 = ahd_fetch_transinfo(ahd, 2504 starget->channel + 'A', 2505 shost->this_id, starget->id, &tstate); 2506 struct ahd_devinfo devinfo; 2507 unsigned int ppr_options = tinfo->goal.ppr_options 2508 & ~MSG_EXT_PPR_QAS_REQ; 2509 unsigned int period = tinfo->goal.period; 2510 unsigned int dt; 2511 unsigned long flags; 2512 2513 #ifdef AHD_DEBUG 2514 if ((ahd_debug & AHD_SHOW_DV) != 0) 2515 printk("%s: %s QAS\n", ahd_name(ahd), 2516 qas ? "enabling" : "disabling"); 2517 #endif 2518 2519 if (qas) { 2520 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2521 } 2522 2523 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2524 2525 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2526 starget->channel + 'A', ROLE_INITIATOR); 2527 ahd_find_syncrate(ahd, &period, &ppr_options, 2528 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2529 2530 ahd_lock(ahd, &flags); 2531 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2532 ppr_options, AHD_TRANS_GOAL, FALSE); 2533 ahd_unlock(ahd, &flags); 2534 } 2535 2536 static void ahd_linux_set_iu(struct scsi_target *starget, int iu) 2537 { 2538 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2539 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2540 struct ahd_tmode_tstate *tstate; 2541 struct ahd_initiator_tinfo *tinfo 2542 = ahd_fetch_transinfo(ahd, 2543 starget->channel + 'A', 2544 shost->this_id, starget->id, &tstate); 2545 struct ahd_devinfo devinfo; 2546 unsigned int ppr_options = tinfo->goal.ppr_options 2547 & ~MSG_EXT_PPR_IU_REQ; 2548 unsigned int period = tinfo->goal.period; 2549 unsigned int dt; 2550 unsigned long flags; 2551 2552 #ifdef AHD_DEBUG 2553 if ((ahd_debug & AHD_SHOW_DV) != 0) 2554 printk("%s: %s IU\n", ahd_name(ahd), 2555 iu ? "enabling" : "disabling"); 2556 #endif 2557 2558 if (iu && spi_max_width(starget)) { 2559 ppr_options |= MSG_EXT_PPR_IU_REQ; 2560 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */ 2561 } 2562 2563 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2564 2565 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2566 starget->channel + 'A', ROLE_INITIATOR); 2567 ahd_find_syncrate(ahd, &period, &ppr_options, 2568 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2569 2570 ahd_lock(ahd, &flags); 2571 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2572 ppr_options, AHD_TRANS_GOAL, FALSE); 2573 ahd_unlock(ahd, &flags); 2574 } 2575 2576 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm) 2577 { 2578 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2579 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2580 struct ahd_tmode_tstate *tstate; 2581 struct ahd_initiator_tinfo *tinfo 2582 = ahd_fetch_transinfo(ahd, 2583 starget->channel + 'A', 2584 shost->this_id, starget->id, &tstate); 2585 struct ahd_devinfo devinfo; 2586 unsigned int ppr_options = tinfo->goal.ppr_options 2587 & ~MSG_EXT_PPR_RD_STRM; 2588 unsigned int period = tinfo->goal.period; 2589 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2590 unsigned long flags; 2591 2592 #ifdef AHD_DEBUG 2593 if ((ahd_debug & AHD_SHOW_DV) != 0) 2594 printk("%s: %s Read Streaming\n", ahd_name(ahd), 2595 rdstrm ? "enabling" : "disabling"); 2596 #endif 2597 2598 if (rdstrm && spi_max_width(starget)) 2599 ppr_options |= MSG_EXT_PPR_RD_STRM; 2600 2601 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2602 starget->channel + 'A', ROLE_INITIATOR); 2603 ahd_find_syncrate(ahd, &period, &ppr_options, 2604 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2605 2606 ahd_lock(ahd, &flags); 2607 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2608 ppr_options, AHD_TRANS_GOAL, FALSE); 2609 ahd_unlock(ahd, &flags); 2610 } 2611 2612 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow) 2613 { 2614 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2615 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2616 struct ahd_tmode_tstate *tstate; 2617 struct ahd_initiator_tinfo *tinfo 2618 = ahd_fetch_transinfo(ahd, 2619 starget->channel + 'A', 2620 shost->this_id, starget->id, &tstate); 2621 struct ahd_devinfo devinfo; 2622 unsigned int ppr_options = tinfo->goal.ppr_options 2623 & ~MSG_EXT_PPR_WR_FLOW; 2624 unsigned int period = tinfo->goal.period; 2625 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2626 unsigned long flags; 2627 2628 #ifdef AHD_DEBUG 2629 if ((ahd_debug & AHD_SHOW_DV) != 0) 2630 printk("%s: %s Write Flow Control\n", ahd_name(ahd), 2631 wrflow ? "enabling" : "disabling"); 2632 #endif 2633 2634 if (wrflow && spi_max_width(starget)) 2635 ppr_options |= MSG_EXT_PPR_WR_FLOW; 2636 2637 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2638 starget->channel + 'A', ROLE_INITIATOR); 2639 ahd_find_syncrate(ahd, &period, &ppr_options, 2640 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2641 2642 ahd_lock(ahd, &flags); 2643 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2644 ppr_options, AHD_TRANS_GOAL, FALSE); 2645 ahd_unlock(ahd, &flags); 2646 } 2647 2648 static void ahd_linux_set_rti(struct scsi_target *starget, int rti) 2649 { 2650 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2651 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2652 struct ahd_tmode_tstate *tstate; 2653 struct ahd_initiator_tinfo *tinfo 2654 = ahd_fetch_transinfo(ahd, 2655 starget->channel + 'A', 2656 shost->this_id, starget->id, &tstate); 2657 struct ahd_devinfo devinfo; 2658 unsigned int ppr_options = tinfo->goal.ppr_options 2659 & ~MSG_EXT_PPR_RTI; 2660 unsigned int period = tinfo->goal.period; 2661 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2662 unsigned long flags; 2663 2664 if ((ahd->features & AHD_RTI) == 0) { 2665 #ifdef AHD_DEBUG 2666 if ((ahd_debug & AHD_SHOW_DV) != 0) 2667 printk("%s: RTI not available\n", ahd_name(ahd)); 2668 #endif 2669 return; 2670 } 2671 2672 #ifdef AHD_DEBUG 2673 if ((ahd_debug & AHD_SHOW_DV) != 0) 2674 printk("%s: %s RTI\n", ahd_name(ahd), 2675 rti ? "enabling" : "disabling"); 2676 #endif 2677 2678 if (rti && spi_max_width(starget)) 2679 ppr_options |= MSG_EXT_PPR_RTI; 2680 2681 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2682 starget->channel + 'A', ROLE_INITIATOR); 2683 ahd_find_syncrate(ahd, &period, &ppr_options, 2684 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2685 2686 ahd_lock(ahd, &flags); 2687 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2688 ppr_options, AHD_TRANS_GOAL, FALSE); 2689 ahd_unlock(ahd, &flags); 2690 } 2691 2692 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp) 2693 { 2694 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2695 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2696 struct ahd_tmode_tstate *tstate; 2697 struct ahd_initiator_tinfo *tinfo 2698 = ahd_fetch_transinfo(ahd, 2699 starget->channel + 'A', 2700 shost->this_id, starget->id, &tstate); 2701 struct ahd_devinfo devinfo; 2702 unsigned int ppr_options = tinfo->goal.ppr_options 2703 & ~MSG_EXT_PPR_PCOMP_EN; 2704 unsigned int period = tinfo->goal.period; 2705 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2706 unsigned long flags; 2707 2708 #ifdef AHD_DEBUG 2709 if ((ahd_debug & AHD_SHOW_DV) != 0) 2710 printk("%s: %s Precompensation\n", ahd_name(ahd), 2711 pcomp ? "Enable" : "Disable"); 2712 #endif 2713 2714 if (pcomp && spi_max_width(starget)) { 2715 uint8_t precomp; 2716 2717 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 2718 const struct ahd_linux_iocell_opts *iocell_opts; 2719 2720 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 2721 precomp = iocell_opts->precomp; 2722 } else { 2723 precomp = AIC79XX_DEFAULT_PRECOMP; 2724 } 2725 ppr_options |= MSG_EXT_PPR_PCOMP_EN; 2726 AHD_SET_PRECOMP(ahd, precomp); 2727 } else { 2728 AHD_SET_PRECOMP(ahd, 0); 2729 } 2730 2731 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2732 starget->channel + 'A', ROLE_INITIATOR); 2733 ahd_find_syncrate(ahd, &period, &ppr_options, 2734 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2735 2736 ahd_lock(ahd, &flags); 2737 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2738 ppr_options, AHD_TRANS_GOAL, FALSE); 2739 ahd_unlock(ahd, &flags); 2740 } 2741 2742 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold) 2743 { 2744 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2745 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2746 struct ahd_tmode_tstate *tstate; 2747 struct ahd_initiator_tinfo *tinfo 2748 = ahd_fetch_transinfo(ahd, 2749 starget->channel + 'A', 2750 shost->this_id, starget->id, &tstate); 2751 struct ahd_devinfo devinfo; 2752 unsigned int ppr_options = tinfo->goal.ppr_options 2753 & ~MSG_EXT_PPR_HOLD_MCS; 2754 unsigned int period = tinfo->goal.period; 2755 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2756 unsigned long flags; 2757 2758 if (hold && spi_max_width(starget)) 2759 ppr_options |= MSG_EXT_PPR_HOLD_MCS; 2760 2761 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2762 starget->channel + 'A', ROLE_INITIATOR); 2763 ahd_find_syncrate(ahd, &period, &ppr_options, 2764 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2765 2766 ahd_lock(ahd, &flags); 2767 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2768 ppr_options, AHD_TRANS_GOAL, FALSE); 2769 ahd_unlock(ahd, &flags); 2770 } 2771 2772 static void ahd_linux_get_signalling(struct Scsi_Host *shost) 2773 { 2774 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata; 2775 unsigned long flags; 2776 u8 mode; 2777 2778 ahd_lock(ahd, &flags); 2779 ahd_pause(ahd); 2780 mode = ahd_inb(ahd, SBLKCTL); 2781 ahd_unpause(ahd); 2782 ahd_unlock(ahd, &flags); 2783 2784 if (mode & ENAB40) 2785 spi_signalling(shost) = SPI_SIGNAL_LVD; 2786 else if (mode & ENAB20) 2787 spi_signalling(shost) = SPI_SIGNAL_SE; 2788 else 2789 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2790 } 2791 2792 static struct spi_function_template ahd_linux_transport_functions = { 2793 .set_offset = ahd_linux_set_offset, 2794 .show_offset = 1, 2795 .set_period = ahd_linux_set_period, 2796 .show_period = 1, 2797 .set_width = ahd_linux_set_width, 2798 .show_width = 1, 2799 .set_dt = ahd_linux_set_dt, 2800 .show_dt = 1, 2801 .set_iu = ahd_linux_set_iu, 2802 .show_iu = 1, 2803 .set_qas = ahd_linux_set_qas, 2804 .show_qas = 1, 2805 .set_rd_strm = ahd_linux_set_rd_strm, 2806 .show_rd_strm = 1, 2807 .set_wr_flow = ahd_linux_set_wr_flow, 2808 .show_wr_flow = 1, 2809 .set_rti = ahd_linux_set_rti, 2810 .show_rti = 1, 2811 .set_pcomp_en = ahd_linux_set_pcomp_en, 2812 .show_pcomp_en = 1, 2813 .set_hold_mcs = ahd_linux_set_hold_mcs, 2814 .show_hold_mcs = 1, 2815 .get_signalling = ahd_linux_get_signalling, 2816 }; 2817 2818 static int __init 2819 ahd_linux_init(void) 2820 { 2821 int error = 0; 2822 2823 /* 2824 * If we've been passed any parameters, process them now. 2825 */ 2826 if (aic79xx) 2827 aic79xx_setup(aic79xx); 2828 2829 ahd_linux_transport_template = 2830 spi_attach_transport(&ahd_linux_transport_functions); 2831 if (!ahd_linux_transport_template) 2832 return -ENODEV; 2833 2834 scsi_transport_reserve_device(ahd_linux_transport_template, 2835 sizeof(struct ahd_linux_device)); 2836 2837 error = ahd_linux_pci_init(); 2838 if (error) 2839 spi_release_transport(ahd_linux_transport_template); 2840 return error; 2841 } 2842 2843 static void __exit 2844 ahd_linux_exit(void) 2845 { 2846 ahd_linux_pci_exit(); 2847 spi_release_transport(ahd_linux_transport_template); 2848 } 2849 2850 module_init(ahd_linux_init); 2851 module_exit(ahd_linux_exit); 2852