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 576 ahd_linux_queue_lck(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *)) 577 { 578 struct ahd_softc *ahd; 579 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device); 580 int rtn = SCSI_MLQUEUE_HOST_BUSY; 581 582 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 583 584 cmd->scsi_done = scsi_done; 585 cmd->result = CAM_REQ_INPROG << 16; 586 rtn = ahd_linux_run_command(ahd, dev, cmd); 587 588 return rtn; 589 } 590 591 static DEF_SCSI_QCMD(ahd_linux_queue) 592 593 static struct scsi_target ** 594 ahd_linux_target_in_softc(struct scsi_target *starget) 595 { 596 struct ahd_softc *ahd = 597 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 598 unsigned int target_offset; 599 600 target_offset = starget->id; 601 if (starget->channel != 0) 602 target_offset += 8; 603 604 return &ahd->platform_data->starget[target_offset]; 605 } 606 607 static int 608 ahd_linux_target_alloc(struct scsi_target *starget) 609 { 610 struct ahd_softc *ahd = 611 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 612 struct seeprom_config *sc = ahd->seep_config; 613 unsigned long flags; 614 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 615 struct ahd_devinfo devinfo; 616 struct ahd_initiator_tinfo *tinfo; 617 struct ahd_tmode_tstate *tstate; 618 char channel = starget->channel + 'A'; 619 620 ahd_lock(ahd, &flags); 621 622 BUG_ON(*ahd_targp != NULL); 623 624 *ahd_targp = starget; 625 626 if (sc) { 627 int flags = sc->device_flags[starget->id]; 628 629 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 630 starget->id, &tstate); 631 632 if ((flags & CFPACKETIZED) == 0) { 633 /* don't negotiate packetized (IU) transfers */ 634 spi_max_iu(starget) = 0; 635 } else { 636 if ((ahd->features & AHD_RTI) == 0) 637 spi_rti(starget) = 0; 638 } 639 640 if ((flags & CFQAS) == 0) 641 spi_max_qas(starget) = 0; 642 643 /* Transinfo values have been set to BIOS settings */ 644 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; 645 spi_min_period(starget) = tinfo->user.period; 646 spi_max_offset(starget) = tinfo->user.offset; 647 } 648 649 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 650 starget->id, &tstate); 651 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id, 652 CAM_LUN_WILDCARD, channel, 653 ROLE_INITIATOR); 654 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0, 655 AHD_TRANS_GOAL, /*paused*/FALSE); 656 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 657 AHD_TRANS_GOAL, /*paused*/FALSE); 658 ahd_unlock(ahd, &flags); 659 660 return 0; 661 } 662 663 static void 664 ahd_linux_target_destroy(struct scsi_target *starget) 665 { 666 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 667 668 *ahd_targp = NULL; 669 } 670 671 static int 672 ahd_linux_slave_alloc(struct scsi_device *sdev) 673 { 674 struct ahd_softc *ahd = 675 *((struct ahd_softc **)sdev->host->hostdata); 676 struct ahd_linux_device *dev; 677 678 if (bootverbose) 679 printk("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id); 680 681 dev = scsi_transport_device_data(sdev); 682 memset(dev, 0, sizeof(*dev)); 683 684 /* 685 * We start out life using untagged 686 * transactions of which we allow one. 687 */ 688 dev->openings = 1; 689 690 /* 691 * Set maxtags to 0. This will be changed if we 692 * later determine that we are dealing with 693 * a tagged queuing capable device. 694 */ 695 dev->maxtags = 0; 696 697 return (0); 698 } 699 700 static int 701 ahd_linux_slave_configure(struct scsi_device *sdev) 702 { 703 if (bootverbose) 704 sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); 705 706 ahd_linux_device_queue_depth(sdev); 707 708 /* Initial Domain Validation */ 709 if (!spi_initial_dv(sdev->sdev_target)) 710 spi_dv_device(sdev); 711 712 return 0; 713 } 714 715 #if defined(__i386__) 716 /* 717 * Return the disk geometry for the given SCSI device. 718 */ 719 static int 720 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 721 sector_t capacity, int geom[]) 722 { 723 int heads; 724 int sectors; 725 int cylinders; 726 int extended; 727 struct ahd_softc *ahd; 728 729 ahd = *((struct ahd_softc **)sdev->host->hostdata); 730 731 if (scsi_partsize(bdev, capacity, geom)) 732 return 0; 733 734 heads = 64; 735 sectors = 32; 736 cylinders = aic_sector_div(capacity, heads, sectors); 737 738 if (aic79xx_extended != 0) 739 extended = 1; 740 else 741 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0; 742 if (extended && cylinders >= 1024) { 743 heads = 255; 744 sectors = 63; 745 cylinders = aic_sector_div(capacity, heads, sectors); 746 } 747 geom[0] = heads; 748 geom[1] = sectors; 749 geom[2] = cylinders; 750 return (0); 751 } 752 #endif 753 754 /* 755 * Abort the current SCSI command(s). 756 */ 757 static int 758 ahd_linux_abort(struct scsi_cmnd *cmd) 759 { 760 int error; 761 762 error = ahd_linux_queue_abort_cmd(cmd); 763 764 return error; 765 } 766 767 /* 768 * Attempt to send a target reset message to the device that timed out. 769 */ 770 static int 771 ahd_linux_dev_reset(struct scsi_cmnd *cmd) 772 { 773 struct ahd_softc *ahd; 774 struct ahd_linux_device *dev; 775 struct scb *reset_scb; 776 u_int cdb_byte; 777 int retval = SUCCESS; 778 struct ahd_initiator_tinfo *tinfo; 779 struct ahd_tmode_tstate *tstate; 780 unsigned long flags; 781 DECLARE_COMPLETION_ONSTACK(done); 782 783 reset_scb = NULL; 784 785 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 786 787 scmd_printk(KERN_INFO, cmd, 788 "Attempting to queue a TARGET RESET message:"); 789 790 printk("CDB:"); 791 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 792 printk(" 0x%x", cmd->cmnd[cdb_byte]); 793 printk("\n"); 794 795 /* 796 * Determine if we currently own this command. 797 */ 798 dev = scsi_transport_device_data(cmd->device); 799 800 if (dev == NULL) { 801 /* 802 * No target device for this command exists, 803 * so we must not still own the command. 804 */ 805 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 806 return SUCCESS; 807 } 808 809 /* 810 * Generate us a new SCB 811 */ 812 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX); 813 if (!reset_scb) { 814 scmd_printk(KERN_INFO, cmd, "No SCB available\n"); 815 return FAILED; 816 } 817 818 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 819 cmd->device->id, &tstate); 820 reset_scb->io_ctx = cmd; 821 reset_scb->platform_data->dev = dev; 822 reset_scb->sg_count = 0; 823 ahd_set_residual(reset_scb, 0); 824 ahd_set_sense_residual(reset_scb, 0); 825 reset_scb->platform_data->xfer_len = 0; 826 reset_scb->hscb->control = 0; 827 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd); 828 reset_scb->hscb->lun = cmd->device->lun; 829 reset_scb->hscb->cdb_len = 0; 830 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET; 831 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE; 832 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 833 reset_scb->flags |= SCB_PACKETIZED; 834 } else { 835 reset_scb->hscb->control |= MK_MESSAGE; 836 } 837 dev->openings--; 838 dev->active++; 839 dev->commands_issued++; 840 841 ahd_lock(ahd, &flags); 842 843 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links); 844 ahd_queue_scb(ahd, reset_scb); 845 846 ahd->platform_data->eh_done = &done; 847 ahd_unlock(ahd, &flags); 848 849 printk("%s: Device reset code sleeping\n", ahd_name(ahd)); 850 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 851 ahd_lock(ahd, &flags); 852 ahd->platform_data->eh_done = NULL; 853 ahd_unlock(ahd, &flags); 854 printk("%s: Device reset timer expired (active %d)\n", 855 ahd_name(ahd), dev->active); 856 retval = FAILED; 857 } 858 printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval); 859 860 return (retval); 861 } 862 863 /* 864 * Reset the SCSI bus. 865 */ 866 static int 867 ahd_linux_bus_reset(struct scsi_cmnd *cmd) 868 { 869 struct ahd_softc *ahd; 870 int found; 871 unsigned long flags; 872 873 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 874 #ifdef AHD_DEBUG 875 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) 876 printk("%s: Bus reset called for cmd %p\n", 877 ahd_name(ahd), cmd); 878 #endif 879 ahd_lock(ahd, &flags); 880 881 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A', 882 /*initiate reset*/TRUE); 883 ahd_unlock(ahd, &flags); 884 885 if (bootverbose) 886 printk("%s: SCSI bus reset delivered. " 887 "%d SCBs aborted.\n", ahd_name(ahd), found); 888 889 return (SUCCESS); 890 } 891 892 struct scsi_host_template aic79xx_driver_template = { 893 .module = THIS_MODULE, 894 .name = "aic79xx", 895 .proc_name = "aic79xx", 896 .show_info = ahd_linux_show_info, 897 .write_info = ahd_proc_write_seeprom, 898 .info = ahd_linux_info, 899 .queuecommand = ahd_linux_queue, 900 .eh_abort_handler = ahd_linux_abort, 901 .eh_device_reset_handler = ahd_linux_dev_reset, 902 .eh_bus_reset_handler = ahd_linux_bus_reset, 903 #if defined(__i386__) 904 .bios_param = ahd_linux_biosparam, 905 #endif 906 .can_queue = AHD_MAX_QUEUE, 907 .this_id = -1, 908 .max_sectors = 8192, 909 .cmd_per_lun = 2, 910 .slave_alloc = ahd_linux_slave_alloc, 911 .slave_configure = ahd_linux_slave_configure, 912 .target_alloc = ahd_linux_target_alloc, 913 .target_destroy = ahd_linux_target_destroy, 914 }; 915 916 /******************************** Bus DMA *************************************/ 917 int 918 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent, 919 bus_size_t alignment, bus_size_t boundary, 920 dma_addr_t lowaddr, dma_addr_t highaddr, 921 bus_dma_filter_t *filter, void *filterarg, 922 bus_size_t maxsize, int nsegments, 923 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 924 { 925 bus_dma_tag_t dmat; 926 927 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC); 928 if (dmat == NULL) 929 return (ENOMEM); 930 931 /* 932 * Linux is very simplistic about DMA memory. For now don't 933 * maintain all specification information. Once Linux supplies 934 * better facilities for doing these operations, or the 935 * needs of this particular driver change, we might need to do 936 * more here. 937 */ 938 dmat->alignment = alignment; 939 dmat->boundary = boundary; 940 dmat->maxsize = maxsize; 941 *ret_tag = dmat; 942 return (0); 943 } 944 945 void 946 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat) 947 { 948 kfree(dmat); 949 } 950 951 int 952 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr, 953 int flags, bus_dmamap_t *mapp) 954 { 955 *vaddr = dma_alloc_coherent(&ahd->dev_softc->dev, dmat->maxsize, mapp, 956 GFP_ATOMIC); 957 if (*vaddr == NULL) 958 return (ENOMEM); 959 return(0); 960 } 961 962 void 963 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat, 964 void* vaddr, bus_dmamap_t map) 965 { 966 dma_free_coherent(&ahd->dev_softc->dev, dmat->maxsize, vaddr, map); 967 } 968 969 int 970 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map, 971 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 972 void *cb_arg, int flags) 973 { 974 /* 975 * Assume for now that this will only be used during 976 * initialization and not for per-transaction buffer mapping. 977 */ 978 bus_dma_segment_t stack_sg; 979 980 stack_sg.ds_addr = map; 981 stack_sg.ds_len = dmat->maxsize; 982 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 983 return (0); 984 } 985 986 void 987 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 988 { 989 } 990 991 int 992 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 993 { 994 /* Nothing to do */ 995 return (0); 996 } 997 998 /********************* Platform Dependent Functions ***************************/ 999 static void 1000 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value) 1001 { 1002 1003 if ((instance >= 0) 1004 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) { 1005 uint8_t *iocell_info; 1006 1007 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance]; 1008 iocell_info[index] = value & 0xFFFF; 1009 if (bootverbose) 1010 printk("iocell[%d:%ld] = %d\n", instance, index, value); 1011 } 1012 } 1013 1014 static void 1015 ahd_linux_setup_tag_info_global(char *p) 1016 { 1017 int tags, i, j; 1018 1019 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 1020 printk("Setting Global Tags= %d\n", tags); 1021 1022 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) { 1023 for (j = 0; j < AHD_NUM_TARGETS; j++) { 1024 aic79xx_tag_info[i].tag_commands[j] = tags; 1025 } 1026 } 1027 } 1028 1029 static void 1030 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 1031 { 1032 1033 if ((instance >= 0) && (targ >= 0) 1034 && (instance < ARRAY_SIZE(aic79xx_tag_info)) 1035 && (targ < AHD_NUM_TARGETS)) { 1036 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF; 1037 if (bootverbose) 1038 printk("tag_info[%d:%d] = %d\n", instance, targ, value); 1039 } 1040 } 1041 1042 static char * 1043 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 1044 void (*callback)(u_long, int, int, int32_t), 1045 u_long callback_arg) 1046 { 1047 char *tok_end; 1048 char *tok_end2; 1049 int i; 1050 int instance; 1051 int targ; 1052 int done; 1053 char tok_list[] = {'.', ',', '{', '}', '\0'}; 1054 1055 /* All options use a ':' name/arg separator */ 1056 if (*opt_arg != ':') 1057 return (opt_arg); 1058 opt_arg++; 1059 instance = -1; 1060 targ = -1; 1061 done = FALSE; 1062 /* 1063 * Restore separator that may be in 1064 * the middle of our option argument. 1065 */ 1066 tok_end = strchr(opt_arg, '\0'); 1067 if (tok_end < end) 1068 *tok_end = ','; 1069 while (!done) { 1070 switch (*opt_arg) { 1071 case '{': 1072 if (instance == -1) { 1073 instance = 0; 1074 } else { 1075 if (depth > 1) { 1076 if (targ == -1) 1077 targ = 0; 1078 } else { 1079 printk("Malformed Option %s\n", 1080 opt_name); 1081 done = TRUE; 1082 } 1083 } 1084 opt_arg++; 1085 break; 1086 case '}': 1087 if (targ != -1) 1088 targ = -1; 1089 else if (instance != -1) 1090 instance = -1; 1091 opt_arg++; 1092 break; 1093 case ',': 1094 case '.': 1095 if (instance == -1) 1096 done = TRUE; 1097 else if (targ >= 0) 1098 targ++; 1099 else if (instance >= 0) 1100 instance++; 1101 opt_arg++; 1102 break; 1103 case '\0': 1104 done = TRUE; 1105 break; 1106 default: 1107 tok_end = end; 1108 for (i = 0; tok_list[i]; i++) { 1109 tok_end2 = strchr(opt_arg, tok_list[i]); 1110 if ((tok_end2) && (tok_end2 < tok_end)) 1111 tok_end = tok_end2; 1112 } 1113 callback(callback_arg, instance, targ, 1114 simple_strtol(opt_arg, NULL, 0)); 1115 opt_arg = tok_end; 1116 break; 1117 } 1118 } 1119 return (opt_arg); 1120 } 1121 1122 /* 1123 * Handle Linux boot parameters. This routine allows for assigning a value 1124 * to a parameter with a ':' between the parameter and the value. 1125 * ie. aic79xx=stpwlev:1,extended 1126 */ 1127 static int 1128 aic79xx_setup(char *s) 1129 { 1130 int i, n; 1131 char *p; 1132 char *end; 1133 1134 static const struct { 1135 const char *name; 1136 uint32_t *flag; 1137 } options[] = { 1138 { "extended", &aic79xx_extended }, 1139 { "no_reset", &aic79xx_no_reset }, 1140 { "verbose", &aic79xx_verbose }, 1141 { "allow_memio", &aic79xx_allow_memio}, 1142 #ifdef AHD_DEBUG 1143 { "debug", &ahd_debug }, 1144 #endif 1145 { "periodic_otag", &aic79xx_periodic_otag }, 1146 { "pci_parity", &aic79xx_pci_parity }, 1147 { "seltime", &aic79xx_seltime }, 1148 { "tag_info", NULL }, 1149 { "global_tag_depth", NULL}, 1150 { "slewrate", NULL }, 1151 { "precomp", NULL }, 1152 { "amplitude", NULL }, 1153 { "slowcrc", &aic79xx_slowcrc }, 1154 }; 1155 1156 end = strchr(s, '\0'); 1157 1158 /* 1159 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE 1160 * will never be 0 in this case. 1161 */ 1162 n = 0; 1163 1164 while ((p = strsep(&s, ",.")) != NULL) { 1165 if (*p == '\0') 1166 continue; 1167 for (i = 0; i < ARRAY_SIZE(options); i++) { 1168 1169 n = strlen(options[i].name); 1170 if (strncmp(options[i].name, p, n) == 0) 1171 break; 1172 } 1173 if (i == ARRAY_SIZE(options)) 1174 continue; 1175 1176 if (strncmp(p, "global_tag_depth", n) == 0) { 1177 ahd_linux_setup_tag_info_global(p + n); 1178 } else if (strncmp(p, "tag_info", n) == 0) { 1179 s = ahd_parse_brace_option("tag_info", p + n, end, 1180 2, ahd_linux_setup_tag_info, 0); 1181 } else if (strncmp(p, "slewrate", n) == 0) { 1182 s = ahd_parse_brace_option("slewrate", 1183 p + n, end, 1, ahd_linux_setup_iocell_info, 1184 AIC79XX_SLEWRATE_INDEX); 1185 } else if (strncmp(p, "precomp", n) == 0) { 1186 s = ahd_parse_brace_option("precomp", 1187 p + n, end, 1, ahd_linux_setup_iocell_info, 1188 AIC79XX_PRECOMP_INDEX); 1189 } else if (strncmp(p, "amplitude", n) == 0) { 1190 s = ahd_parse_brace_option("amplitude", 1191 p + n, end, 1, ahd_linux_setup_iocell_info, 1192 AIC79XX_AMPLITUDE_INDEX); 1193 } else if (p[n] == ':') { 1194 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1195 } else if (!strncmp(p, "verbose", n)) { 1196 *(options[i].flag) = 1; 1197 } else { 1198 *(options[i].flag) ^= 0xFFFFFFFF; 1199 } 1200 } 1201 return 1; 1202 } 1203 1204 __setup("aic79xx=", aic79xx_setup); 1205 1206 uint32_t aic79xx_verbose; 1207 1208 int 1209 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template) 1210 { 1211 char buf[80]; 1212 struct Scsi_Host *host; 1213 char *new_name; 1214 u_long s; 1215 int retval; 1216 1217 template->name = ahd->description; 1218 host = scsi_host_alloc(template, sizeof(struct ahd_softc *)); 1219 if (host == NULL) 1220 return (ENOMEM); 1221 1222 *((struct ahd_softc **)host->hostdata) = ahd; 1223 ahd->platform_data->host = host; 1224 host->can_queue = AHD_MAX_QUEUE; 1225 host->cmd_per_lun = 2; 1226 host->sg_tablesize = AHD_NSEG; 1227 host->this_id = ahd->our_id; 1228 host->irq = ahd->platform_data->irq; 1229 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8; 1230 host->max_lun = AHD_NUM_LUNS; 1231 host->max_channel = 0; 1232 host->sg_tablesize = AHD_NSEG; 1233 ahd_lock(ahd, &s); 1234 ahd_set_unit(ahd, ahd_linux_unit++); 1235 ahd_unlock(ahd, &s); 1236 sprintf(buf, "scsi%d", host->host_no); 1237 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC); 1238 if (new_name != NULL) { 1239 strcpy(new_name, buf); 1240 ahd_set_name(ahd, new_name); 1241 } 1242 host->unique_id = ahd->unit; 1243 ahd_linux_initialize_scsi_bus(ahd); 1244 ahd_intr_enable(ahd, TRUE); 1245 1246 host->transportt = ahd_linux_transport_template; 1247 1248 retval = scsi_add_host(host, &ahd->dev_softc->dev); 1249 if (retval) { 1250 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n"); 1251 scsi_host_put(host); 1252 return retval; 1253 } 1254 1255 scsi_scan_host(host); 1256 return 0; 1257 } 1258 1259 /* 1260 * Place the SCSI bus into a known state by either resetting it, 1261 * or forcing transfer negotiations on the next command to any 1262 * target. 1263 */ 1264 static void 1265 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd) 1266 { 1267 u_int target_id; 1268 u_int numtarg; 1269 unsigned long s; 1270 1271 target_id = 0; 1272 numtarg = 0; 1273 1274 if (aic79xx_no_reset != 0) 1275 ahd->flags &= ~AHD_RESET_BUS_A; 1276 1277 if ((ahd->flags & AHD_RESET_BUS_A) != 0) 1278 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE); 1279 else 1280 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8; 1281 1282 ahd_lock(ahd, &s); 1283 1284 /* 1285 * Force negotiation to async for all targets that 1286 * will not see an initial bus reset. 1287 */ 1288 for (; target_id < numtarg; target_id++) { 1289 struct ahd_devinfo devinfo; 1290 struct ahd_initiator_tinfo *tinfo; 1291 struct ahd_tmode_tstate *tstate; 1292 1293 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1294 target_id, &tstate); 1295 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, 1296 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); 1297 ahd_update_neg_request(ahd, &devinfo, tstate, 1298 tinfo, AHD_NEG_ALWAYS); 1299 } 1300 ahd_unlock(ahd, &s); 1301 /* Give the bus some time to recover */ 1302 if ((ahd->flags & AHD_RESET_BUS_A) != 0) { 1303 ahd_freeze_simq(ahd); 1304 msleep(AIC79XX_RESET_DELAY); 1305 ahd_release_simq(ahd); 1306 } 1307 } 1308 1309 int 1310 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg) 1311 { 1312 ahd->platform_data = 1313 kzalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC); 1314 if (ahd->platform_data == NULL) 1315 return (ENOMEM); 1316 ahd->platform_data->irq = AHD_LINUX_NOIRQ; 1317 ahd_lockinit(ahd); 1318 ahd->seltime = (aic79xx_seltime & 0x3) << 4; 1319 return (0); 1320 } 1321 1322 void 1323 ahd_platform_free(struct ahd_softc *ahd) 1324 { 1325 struct scsi_target *starget; 1326 int i; 1327 1328 if (ahd->platform_data != NULL) { 1329 /* destroy all of the device and target objects */ 1330 for (i = 0; i < AHD_NUM_TARGETS; i++) { 1331 starget = ahd->platform_data->starget[i]; 1332 if (starget != NULL) { 1333 ahd->platform_data->starget[i] = NULL; 1334 } 1335 } 1336 1337 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ) 1338 free_irq(ahd->platform_data->irq, ahd); 1339 if (ahd->tags[0] == BUS_SPACE_PIO 1340 && ahd->bshs[0].ioport != 0) 1341 release_region(ahd->bshs[0].ioport, 256); 1342 if (ahd->tags[1] == BUS_SPACE_PIO 1343 && ahd->bshs[1].ioport != 0) 1344 release_region(ahd->bshs[1].ioport, 256); 1345 if (ahd->tags[0] == BUS_SPACE_MEMIO 1346 && ahd->bshs[0].maddr != NULL) { 1347 iounmap(ahd->bshs[0].maddr); 1348 release_mem_region(ahd->platform_data->mem_busaddr, 1349 0x1000); 1350 } 1351 if (ahd->platform_data->host) 1352 scsi_host_put(ahd->platform_data->host); 1353 1354 kfree(ahd->platform_data); 1355 } 1356 } 1357 1358 void 1359 ahd_platform_init(struct ahd_softc *ahd) 1360 { 1361 /* 1362 * Lookup and commit any modified IO Cell options. 1363 */ 1364 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 1365 const struct ahd_linux_iocell_opts *iocell_opts; 1366 1367 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 1368 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP) 1369 AHD_SET_PRECOMP(ahd, iocell_opts->precomp); 1370 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE) 1371 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate); 1372 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE) 1373 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude); 1374 } 1375 1376 } 1377 1378 void 1379 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb) 1380 { 1381 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), 1382 SCB_GET_CHANNEL(ahd, scb), 1383 SCB_GET_LUN(scb), SCB_LIST_NULL, 1384 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1385 } 1386 1387 void 1388 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev, 1389 struct ahd_devinfo *devinfo, ahd_queue_alg alg) 1390 { 1391 struct ahd_linux_device *dev; 1392 int was_queuing; 1393 int now_queuing; 1394 1395 if (sdev == NULL) 1396 return; 1397 1398 dev = scsi_transport_device_data(sdev); 1399 1400 if (dev == NULL) 1401 return; 1402 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED); 1403 switch (alg) { 1404 default: 1405 case AHD_QUEUE_NONE: 1406 now_queuing = 0; 1407 break; 1408 case AHD_QUEUE_BASIC: 1409 now_queuing = AHD_DEV_Q_BASIC; 1410 break; 1411 case AHD_QUEUE_TAGGED: 1412 now_queuing = AHD_DEV_Q_TAGGED; 1413 break; 1414 } 1415 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0 1416 && (was_queuing != now_queuing) 1417 && (dev->active != 0)) { 1418 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY; 1419 dev->qfrozen++; 1420 } 1421 1422 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG); 1423 if (now_queuing) { 1424 u_int usertags; 1425 1426 usertags = ahd_linux_user_tagdepth(ahd, devinfo); 1427 if (!was_queuing) { 1428 /* 1429 * Start out aggressively and allow our 1430 * dynamic queue depth algorithm to take 1431 * care of the rest. 1432 */ 1433 dev->maxtags = usertags; 1434 dev->openings = dev->maxtags - dev->active; 1435 } 1436 if (dev->maxtags == 0) { 1437 /* 1438 * Queueing is disabled by the user. 1439 */ 1440 dev->openings = 1; 1441 } else if (alg == AHD_QUEUE_TAGGED) { 1442 dev->flags |= AHD_DEV_Q_TAGGED; 1443 if (aic79xx_periodic_otag != 0) 1444 dev->flags |= AHD_DEV_PERIODIC_OTAG; 1445 } else 1446 dev->flags |= AHD_DEV_Q_BASIC; 1447 } else { 1448 /* We can only have one opening. */ 1449 dev->maxtags = 0; 1450 dev->openings = 1 - dev->active; 1451 } 1452 1453 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) { 1454 case AHD_DEV_Q_BASIC: 1455 case AHD_DEV_Q_TAGGED: 1456 scsi_change_queue_depth(sdev, 1457 dev->openings + dev->active); 1458 break; 1459 default: 1460 /* 1461 * We allow the OS to queue 2 untagged transactions to 1462 * us at any time even though we can only execute them 1463 * serially on the controller/device. This should 1464 * remove some latency. 1465 */ 1466 scsi_change_queue_depth(sdev, 1); 1467 break; 1468 } 1469 } 1470 1471 int 1472 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel, 1473 int lun, u_int tag, role_t role, uint32_t status) 1474 { 1475 return 0; 1476 } 1477 1478 static u_int 1479 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) 1480 { 1481 static int warned_user; 1482 u_int tags; 1483 1484 tags = 0; 1485 if ((ahd->user_discenable & devinfo->target_mask) != 0) { 1486 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) { 1487 1488 if (warned_user == 0) { 1489 printk(KERN_WARNING 1490 "aic79xx: WARNING: Insufficient tag_info instances\n" 1491 "aic79xx: for installed controllers. Using defaults\n" 1492 "aic79xx: Please update the aic79xx_tag_info array in\n" 1493 "aic79xx: the aic79xx_osm.c source file.\n"); 1494 warned_user++; 1495 } 1496 tags = AHD_MAX_QUEUE; 1497 } else { 1498 adapter_tag_info_t *tag_info; 1499 1500 tag_info = &aic79xx_tag_info[ahd->unit]; 1501 tags = tag_info->tag_commands[devinfo->target_offset]; 1502 if (tags > AHD_MAX_QUEUE) 1503 tags = AHD_MAX_QUEUE; 1504 } 1505 } 1506 return (tags); 1507 } 1508 1509 /* 1510 * Determines the queue depth for a given device. 1511 */ 1512 static void 1513 ahd_linux_device_queue_depth(struct scsi_device *sdev) 1514 { 1515 struct ahd_devinfo devinfo; 1516 u_int tags; 1517 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata); 1518 1519 ahd_compile_devinfo(&devinfo, 1520 ahd->our_id, 1521 sdev->sdev_target->id, sdev->lun, 1522 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1523 ROLE_INITIATOR); 1524 tags = ahd_linux_user_tagdepth(ahd, &devinfo); 1525 if (tags != 0 && sdev->tagged_supported != 0) { 1526 1527 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED); 1528 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1529 devinfo.lun, AC_TRANSFER_NEG); 1530 ahd_print_devinfo(ahd, &devinfo); 1531 printk("Tagged Queuing enabled. Depth %d\n", tags); 1532 } else { 1533 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE); 1534 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1535 devinfo.lun, AC_TRANSFER_NEG); 1536 } 1537 } 1538 1539 static int 1540 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev, 1541 struct scsi_cmnd *cmd) 1542 { 1543 struct scb *scb; 1544 struct hardware_scb *hscb; 1545 struct ahd_initiator_tinfo *tinfo; 1546 struct ahd_tmode_tstate *tstate; 1547 u_int col_idx; 1548 uint16_t mask; 1549 unsigned long flags; 1550 int nseg; 1551 1552 nseg = scsi_dma_map(cmd); 1553 if (nseg < 0) 1554 return SCSI_MLQUEUE_HOST_BUSY; 1555 1556 ahd_lock(ahd, &flags); 1557 1558 /* 1559 * Get an scb to use. 1560 */ 1561 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1562 cmd->device->id, &tstate); 1563 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0 1564 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 1565 col_idx = AHD_NEVER_COL_IDX; 1566 } else { 1567 col_idx = AHD_BUILD_COL_IDX(cmd->device->id, 1568 cmd->device->lun); 1569 } 1570 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) { 1571 ahd->flags |= AHD_RESOURCE_SHORTAGE; 1572 ahd_unlock(ahd, &flags); 1573 scsi_dma_unmap(cmd); 1574 return SCSI_MLQUEUE_HOST_BUSY; 1575 } 1576 1577 scb->io_ctx = cmd; 1578 scb->platform_data->dev = dev; 1579 hscb = scb->hscb; 1580 cmd->host_scribble = (char *)scb; 1581 1582 /* 1583 * Fill out basics of the HSCB. 1584 */ 1585 hscb->control = 0; 1586 hscb->scsiid = BUILD_SCSIID(ahd, cmd); 1587 hscb->lun = cmd->device->lun; 1588 scb->hscb->task_management = 0; 1589 mask = SCB_GET_TARGET_MASK(ahd, scb); 1590 1591 if ((ahd->user_discenable & mask) != 0) 1592 hscb->control |= DISCENB; 1593 1594 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) 1595 scb->flags |= SCB_PACKETIZED; 1596 1597 if ((tstate->auto_negotiate & mask) != 0) { 1598 scb->flags |= SCB_AUTO_NEGOTIATE; 1599 scb->hscb->control |= MK_MESSAGE; 1600 } 1601 1602 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) { 1603 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH 1604 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) { 1605 hscb->control |= ORDERED_QUEUE_TAG; 1606 dev->commands_since_idle_or_otag = 0; 1607 } else { 1608 hscb->control |= SIMPLE_QUEUE_TAG; 1609 } 1610 } 1611 1612 hscb->cdb_len = cmd->cmd_len; 1613 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len); 1614 1615 scb->platform_data->xfer_len = 0; 1616 ahd_set_residual(scb, 0); 1617 ahd_set_sense_residual(scb, 0); 1618 scb->sg_count = 0; 1619 1620 if (nseg > 0) { 1621 void *sg = scb->sg_list; 1622 struct scatterlist *cur_seg; 1623 int i; 1624 1625 scb->platform_data->xfer_len = 0; 1626 1627 scsi_for_each_sg(cmd, cur_seg, nseg, i) { 1628 dma_addr_t addr; 1629 bus_size_t len; 1630 1631 addr = sg_dma_address(cur_seg); 1632 len = sg_dma_len(cur_seg); 1633 scb->platform_data->xfer_len += len; 1634 sg = ahd_sg_setup(ahd, scb, sg, addr, len, 1635 i == (nseg - 1)); 1636 } 1637 } 1638 1639 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); 1640 dev->openings--; 1641 dev->active++; 1642 dev->commands_issued++; 1643 1644 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0) 1645 dev->commands_since_idle_or_otag++; 1646 scb->flags |= SCB_ACTIVE; 1647 ahd_queue_scb(ahd, scb); 1648 1649 ahd_unlock(ahd, &flags); 1650 1651 return 0; 1652 } 1653 1654 /* 1655 * SCSI controller interrupt handler. 1656 */ 1657 irqreturn_t 1658 ahd_linux_isr(int irq, void *dev_id) 1659 { 1660 struct ahd_softc *ahd; 1661 u_long flags; 1662 int ours; 1663 1664 ahd = (struct ahd_softc *) dev_id; 1665 ahd_lock(ahd, &flags); 1666 ours = ahd_intr(ahd); 1667 ahd_unlock(ahd, &flags); 1668 return IRQ_RETVAL(ours); 1669 } 1670 1671 void 1672 ahd_send_async(struct ahd_softc *ahd, char channel, 1673 u_int target, u_int lun, ac_code code) 1674 { 1675 switch (code) { 1676 case AC_TRANSFER_NEG: 1677 { 1678 struct scsi_target *starget; 1679 struct ahd_initiator_tinfo *tinfo; 1680 struct ahd_tmode_tstate *tstate; 1681 unsigned int target_ppr_options; 1682 1683 BUG_ON(target == CAM_TARGET_WILDCARD); 1684 1685 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 1686 target, &tstate); 1687 1688 /* 1689 * Don't bother reporting results while 1690 * negotiations are still pending. 1691 */ 1692 if (tinfo->curr.period != tinfo->goal.period 1693 || tinfo->curr.width != tinfo->goal.width 1694 || tinfo->curr.offset != tinfo->goal.offset 1695 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1696 if (bootverbose == 0) 1697 break; 1698 1699 /* 1700 * Don't bother reporting results that 1701 * are identical to those last reported. 1702 */ 1703 starget = ahd->platform_data->starget[target]; 1704 if (starget == NULL) 1705 break; 1706 1707 target_ppr_options = 1708 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1709 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1710 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0) 1711 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0) 1712 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0) 1713 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0) 1714 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0) 1715 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0); 1716 1717 if (tinfo->curr.period == spi_period(starget) 1718 && tinfo->curr.width == spi_width(starget) 1719 && tinfo->curr.offset == spi_offset(starget) 1720 && tinfo->curr.ppr_options == target_ppr_options) 1721 if (bootverbose == 0) 1722 break; 1723 1724 spi_period(starget) = tinfo->curr.period; 1725 spi_width(starget) = tinfo->curr.width; 1726 spi_offset(starget) = tinfo->curr.offset; 1727 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1728 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1729 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1730 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0; 1731 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0; 1732 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0; 1733 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0; 1734 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0; 1735 spi_display_xfer_agreement(starget); 1736 break; 1737 } 1738 case AC_SENT_BDR: 1739 { 1740 WARN_ON(lun != CAM_LUN_WILDCARD); 1741 scsi_report_device_reset(ahd->platform_data->host, 1742 channel - 'A', target); 1743 break; 1744 } 1745 case AC_BUS_RESET: 1746 if (ahd->platform_data->host != NULL) { 1747 scsi_report_bus_reset(ahd->platform_data->host, 1748 channel - 'A'); 1749 } 1750 break; 1751 default: 1752 panic("ahd_send_async: Unexpected async event"); 1753 } 1754 } 1755 1756 /* 1757 * Calls the higher level scsi done function and frees the scb. 1758 */ 1759 void 1760 ahd_done(struct ahd_softc *ahd, struct scb *scb) 1761 { 1762 struct scsi_cmnd *cmd; 1763 struct ahd_linux_device *dev; 1764 1765 if ((scb->flags & SCB_ACTIVE) == 0) { 1766 printk("SCB %d done'd twice\n", SCB_GET_TAG(scb)); 1767 ahd_dump_card_state(ahd); 1768 panic("Stopping for safety"); 1769 } 1770 LIST_REMOVE(scb, pending_links); 1771 cmd = scb->io_ctx; 1772 dev = scb->platform_data->dev; 1773 dev->active--; 1774 dev->openings++; 1775 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1776 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1777 dev->qfrozen--; 1778 } 1779 ahd_linux_unmap_scb(ahd, scb); 1780 1781 /* 1782 * Guard against stale sense data. 1783 * The Linux mid-layer assumes that sense 1784 * was retrieved anytime the first byte of 1785 * the sense buffer looks "sane". 1786 */ 1787 cmd->sense_buffer[0] = 0; 1788 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) { 1789 #ifdef AHD_REPORT_UNDERFLOWS 1790 uint32_t amount_xferred; 1791 1792 amount_xferred = 1793 ahd_get_transfer_length(scb) - ahd_get_residual(scb); 1794 #endif 1795 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1796 #ifdef AHD_DEBUG 1797 if ((ahd_debug & AHD_SHOW_MISC) != 0) { 1798 ahd_print_path(ahd, scb); 1799 printk("Set CAM_UNCOR_PARITY\n"); 1800 } 1801 #endif 1802 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY); 1803 #ifdef AHD_REPORT_UNDERFLOWS 1804 /* 1805 * This code is disabled by default as some 1806 * clients of the SCSI system do not properly 1807 * initialize the underflow parameter. This 1808 * results in spurious termination of commands 1809 * that complete as expected (e.g. underflow is 1810 * allowed as command can return variable amounts 1811 * of data. 1812 */ 1813 } else if (amount_xferred < scb->io_ctx->underflow) { 1814 u_int i; 1815 1816 ahd_print_path(ahd, scb); 1817 printk("CDB:"); 1818 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1819 printk(" 0x%x", scb->io_ctx->cmnd[i]); 1820 printk("\n"); 1821 ahd_print_path(ahd, scb); 1822 printk("Saw underflow (%ld of %ld bytes). " 1823 "Treated as error\n", 1824 ahd_get_residual(scb), 1825 ahd_get_transfer_length(scb)); 1826 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1827 #endif 1828 } else { 1829 ahd_set_transaction_status(scb, CAM_REQ_CMP); 1830 } 1831 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1832 ahd_linux_handle_scsi_status(ahd, cmd->device, scb); 1833 } 1834 1835 if (dev->openings == 1 1836 && ahd_get_transaction_status(scb) == CAM_REQ_CMP 1837 && ahd_get_scsi_status(scb) != SAM_STAT_TASK_SET_FULL) 1838 dev->tag_success_count++; 1839 /* 1840 * Some devices deal with temporary internal resource 1841 * shortages by returning queue full. When the queue 1842 * full occurrs, we throttle back. Slowly try to get 1843 * back to our previous queue depth. 1844 */ 1845 if ((dev->openings + dev->active) < dev->maxtags 1846 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) { 1847 dev->tag_success_count = 0; 1848 dev->openings++; 1849 } 1850 1851 if (dev->active == 0) 1852 dev->commands_since_idle_or_otag = 0; 1853 1854 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1855 printk("Recovery SCB completes\n"); 1856 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT 1857 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED) 1858 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1859 1860 if (ahd->platform_data->eh_done) 1861 complete(ahd->platform_data->eh_done); 1862 } 1863 1864 ahd_free_scb(ahd, scb); 1865 ahd_linux_queue_cmd_complete(ahd, cmd); 1866 } 1867 1868 static void 1869 ahd_linux_handle_scsi_status(struct ahd_softc *ahd, 1870 struct scsi_device *sdev, struct scb *scb) 1871 { 1872 struct ahd_devinfo devinfo; 1873 struct ahd_linux_device *dev = scsi_transport_device_data(sdev); 1874 1875 ahd_compile_devinfo(&devinfo, 1876 ahd->our_id, 1877 sdev->sdev_target->id, sdev->lun, 1878 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1879 ROLE_INITIATOR); 1880 1881 /* 1882 * We don't currently trust the mid-layer to 1883 * properly deal with queue full or busy. So, 1884 * when one occurs, we tell the mid-layer to 1885 * unconditionally requeue the command to us 1886 * so that we can retry it ourselves. We also 1887 * implement our own throttling mechanism so 1888 * we don't clobber the device with too many 1889 * commands. 1890 */ 1891 switch (ahd_get_scsi_status(scb)) { 1892 default: 1893 break; 1894 case SAM_STAT_CHECK_CONDITION: 1895 case SAM_STAT_COMMAND_TERMINATED: 1896 { 1897 struct scsi_cmnd *cmd; 1898 1899 /* 1900 * Copy sense information to the OS's cmd 1901 * structure if it is available. 1902 */ 1903 cmd = scb->io_ctx; 1904 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) { 1905 struct scsi_status_iu_header *siu; 1906 u_int sense_size; 1907 u_int sense_offset; 1908 1909 if (scb->flags & SCB_SENSE) { 1910 sense_size = min(sizeof(struct scsi_sense_data) 1911 - ahd_get_sense_residual(scb), 1912 (u_long)SCSI_SENSE_BUFFERSIZE); 1913 sense_offset = 0; 1914 } else { 1915 /* 1916 * Copy only the sense data into the provided 1917 * buffer. 1918 */ 1919 siu = (struct scsi_status_iu_header *) 1920 scb->sense_data; 1921 sense_size = min_t(size_t, 1922 scsi_4btoul(siu->sense_length), 1923 SCSI_SENSE_BUFFERSIZE); 1924 sense_offset = SIU_SENSE_OFFSET(siu); 1925 } 1926 1927 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1928 memcpy(cmd->sense_buffer, 1929 ahd_get_sense_buf(ahd, scb) 1930 + sense_offset, sense_size); 1931 set_status_byte(cmd, SAM_STAT_CHECK_CONDITION); 1932 1933 #ifdef AHD_DEBUG 1934 if (ahd_debug & AHD_SHOW_SENSE) { 1935 int i; 1936 1937 printk("Copied %d bytes of sense data at %d:", 1938 sense_size, sense_offset); 1939 for (i = 0; i < sense_size; i++) { 1940 if ((i & 0xF) == 0) 1941 printk("\n"); 1942 printk("0x%x ", cmd->sense_buffer[i]); 1943 } 1944 printk("\n"); 1945 } 1946 #endif 1947 } 1948 break; 1949 } 1950 case SAM_STAT_TASK_SET_FULL: 1951 /* 1952 * By the time the core driver has returned this 1953 * command, all other commands that were queued 1954 * to us but not the device have been returned. 1955 * This ensures that dev->active is equal to 1956 * the number of commands actually queued to 1957 * the device. 1958 */ 1959 dev->tag_success_count = 0; 1960 if (dev->active != 0) { 1961 /* 1962 * Drop our opening count to the number 1963 * of commands currently outstanding. 1964 */ 1965 dev->openings = 0; 1966 #ifdef AHD_DEBUG 1967 if ((ahd_debug & AHD_SHOW_QFULL) != 0) { 1968 ahd_print_path(ahd, scb); 1969 printk("Dropping tag count to %d\n", 1970 dev->active); 1971 } 1972 #endif 1973 if (dev->active == dev->tags_on_last_queuefull) { 1974 1975 dev->last_queuefull_same_count++; 1976 /* 1977 * If we repeatedly see a queue full 1978 * at the same queue depth, this 1979 * device has a fixed number of tag 1980 * slots. Lock in this tag depth 1981 * so we stop seeing queue fulls from 1982 * this device. 1983 */ 1984 if (dev->last_queuefull_same_count 1985 == AHD_LOCK_TAGS_COUNT) { 1986 dev->maxtags = dev->active; 1987 ahd_print_path(ahd, scb); 1988 printk("Locking max tag count at %d\n", 1989 dev->active); 1990 } 1991 } else { 1992 dev->tags_on_last_queuefull = dev->active; 1993 dev->last_queuefull_same_count = 0; 1994 } 1995 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); 1996 ahd_set_scsi_status(scb, SAM_STAT_GOOD); 1997 ahd_platform_set_tags(ahd, sdev, &devinfo, 1998 (dev->flags & AHD_DEV_Q_BASIC) 1999 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 2000 break; 2001 } 2002 /* 2003 * Drop down to a single opening, and treat this 2004 * as if the target returned BUSY SCSI status. 2005 */ 2006 dev->openings = 1; 2007 ahd_platform_set_tags(ahd, sdev, &devinfo, 2008 (dev->flags & AHD_DEV_Q_BASIC) 2009 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 2010 ahd_set_scsi_status(scb, SAM_STAT_BUSY); 2011 } 2012 } 2013 2014 static void 2015 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd) 2016 { 2017 int status; 2018 int new_status = DID_OK; 2019 int do_fallback = 0; 2020 int scsi_status; 2021 struct scsi_sense_data *sense; 2022 2023 /* 2024 * Map CAM error codes into Linux Error codes. We 2025 * avoid the conversion so that the DV code has the 2026 * full error information available when making 2027 * state change decisions. 2028 */ 2029 2030 status = ahd_cmd_get_transaction_status(cmd); 2031 switch (status) { 2032 case CAM_REQ_INPROG: 2033 case CAM_REQ_CMP: 2034 new_status = DID_OK; 2035 break; 2036 case CAM_AUTOSENSE_FAIL: 2037 new_status = DID_ERROR; 2038 fallthrough; 2039 case CAM_SCSI_STATUS_ERROR: 2040 scsi_status = ahd_cmd_get_scsi_status(cmd); 2041 2042 switch(scsi_status) { 2043 case SAM_STAT_COMMAND_TERMINATED: 2044 case SAM_STAT_CHECK_CONDITION: 2045 sense = (struct scsi_sense_data *) 2046 cmd->sense_buffer; 2047 if (sense->extra_len >= 5 && 2048 (sense->add_sense_code == 0x47 2049 || sense->add_sense_code == 0x48)) 2050 do_fallback = 1; 2051 break; 2052 default: 2053 break; 2054 } 2055 break; 2056 case CAM_REQ_ABORTED: 2057 new_status = DID_ABORT; 2058 break; 2059 case CAM_BUSY: 2060 new_status = DID_BUS_BUSY; 2061 break; 2062 case CAM_REQ_INVALID: 2063 case CAM_PATH_INVALID: 2064 new_status = DID_BAD_TARGET; 2065 break; 2066 case CAM_SEL_TIMEOUT: 2067 new_status = DID_NO_CONNECT; 2068 break; 2069 case CAM_SCSI_BUS_RESET: 2070 case CAM_BDR_SENT: 2071 new_status = DID_RESET; 2072 break; 2073 case CAM_UNCOR_PARITY: 2074 new_status = DID_PARITY; 2075 do_fallback = 1; 2076 break; 2077 case CAM_CMD_TIMEOUT: 2078 new_status = DID_TIME_OUT; 2079 do_fallback = 1; 2080 break; 2081 case CAM_REQ_CMP_ERR: 2082 case CAM_UNEXP_BUSFREE: 2083 case CAM_DATA_RUN_ERR: 2084 new_status = DID_ERROR; 2085 do_fallback = 1; 2086 break; 2087 case CAM_UA_ABORT: 2088 case CAM_NO_HBA: 2089 case CAM_SEQUENCE_FAIL: 2090 case CAM_CCB_LEN_ERR: 2091 case CAM_PROVIDE_FAIL: 2092 case CAM_REQ_TERMIO: 2093 case CAM_UNREC_HBA_ERROR: 2094 case CAM_REQ_TOO_BIG: 2095 new_status = DID_ERROR; 2096 break; 2097 case CAM_REQUEUE_REQ: 2098 new_status = DID_REQUEUE; 2099 break; 2100 default: 2101 /* We should never get here */ 2102 new_status = DID_ERROR; 2103 break; 2104 } 2105 2106 if (do_fallback) { 2107 printk("%s: device overrun (status %x) on %d:%d:%d\n", 2108 ahd_name(ahd), status, cmd->device->channel, 2109 cmd->device->id, (u8)cmd->device->lun); 2110 } 2111 2112 ahd_cmd_set_transaction_status(cmd, new_status); 2113 2114 cmd->scsi_done(cmd); 2115 } 2116 2117 static void 2118 ahd_freeze_simq(struct ahd_softc *ahd) 2119 { 2120 scsi_block_requests(ahd->platform_data->host); 2121 } 2122 2123 static void 2124 ahd_release_simq(struct ahd_softc *ahd) 2125 { 2126 scsi_unblock_requests(ahd->platform_data->host); 2127 } 2128 2129 static int 2130 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd) 2131 { 2132 struct ahd_softc *ahd; 2133 struct ahd_linux_device *dev; 2134 struct scb *pending_scb; 2135 u_int saved_scbptr; 2136 u_int active_scbptr; 2137 u_int last_phase; 2138 u_int cdb_byte; 2139 int retval = SUCCESS; 2140 int was_paused; 2141 int paused; 2142 int wait; 2143 int disconnected; 2144 ahd_mode_state saved_modes; 2145 unsigned long flags; 2146 2147 pending_scb = NULL; 2148 paused = FALSE; 2149 wait = FALSE; 2150 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 2151 2152 scmd_printk(KERN_INFO, cmd, 2153 "Attempting to queue an ABORT message:"); 2154 2155 printk("CDB:"); 2156 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2157 printk(" 0x%x", cmd->cmnd[cdb_byte]); 2158 printk("\n"); 2159 2160 ahd_lock(ahd, &flags); 2161 2162 /* 2163 * First determine if we currently own this command. 2164 * Start by searching the device queue. If not found 2165 * there, check the pending_scb list. If not found 2166 * at all, and the system wanted us to just abort the 2167 * command, return success. 2168 */ 2169 dev = scsi_transport_device_data(cmd->device); 2170 2171 if (dev == NULL) { 2172 /* 2173 * No target device for this command exists, 2174 * so we must not still own the command. 2175 */ 2176 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 2177 goto done; 2178 } 2179 2180 /* 2181 * See if we can find a matching cmd in the pending list. 2182 */ 2183 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { 2184 if (pending_scb->io_ctx == cmd) 2185 break; 2186 } 2187 2188 if (pending_scb == NULL) { 2189 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2190 goto done; 2191 } 2192 2193 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2194 /* 2195 * We can't queue two recovery actions using the same SCB 2196 */ 2197 retval = FAILED; 2198 goto done; 2199 } 2200 2201 /* 2202 * Ensure that the card doesn't do anything 2203 * behind our back. Also make sure that we 2204 * didn't "just" miss an interrupt that would 2205 * affect this cmd. 2206 */ 2207 was_paused = ahd_is_paused(ahd); 2208 ahd_pause_and_flushwork(ahd); 2209 paused = TRUE; 2210 2211 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2212 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2213 goto done; 2214 } 2215 2216 printk("%s: At time of recovery, card was %spaused\n", 2217 ahd_name(ahd), was_paused ? "" : "not "); 2218 ahd_dump_card_state(ahd); 2219 2220 disconnected = TRUE; 2221 if (ahd_search_qinfifo(ahd, cmd->device->id, 2222 cmd->device->channel + 'A', 2223 cmd->device->lun, 2224 pending_scb->hscb->tag, 2225 ROLE_INITIATOR, CAM_REQ_ABORTED, 2226 SEARCH_COMPLETE) > 0) { 2227 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2228 ahd_name(ahd), cmd->device->channel, 2229 cmd->device->id, (u8)cmd->device->lun); 2230 goto done; 2231 } 2232 2233 saved_modes = ahd_save_modes(ahd); 2234 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); 2235 last_phase = ahd_inb(ahd, LASTPHASE); 2236 saved_scbptr = ahd_get_scbptr(ahd); 2237 active_scbptr = saved_scbptr; 2238 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2239 struct scb *bus_scb; 2240 2241 bus_scb = ahd_lookup_scb(ahd, active_scbptr); 2242 if (bus_scb == pending_scb) 2243 disconnected = FALSE; 2244 } 2245 2246 /* 2247 * At this point, pending_scb is the scb associated with the 2248 * passed in command. That command is currently active on the 2249 * bus or is in the disconnected state. 2250 */ 2251 ahd_inb(ahd, SAVED_SCSIID); 2252 if (last_phase != P_BUSFREE 2253 && SCB_GET_TAG(pending_scb) == active_scbptr) { 2254 2255 /* 2256 * We're active on the bus, so assert ATN 2257 * and hope that the target responds. 2258 */ 2259 pending_scb = ahd_lookup_scb(ahd, active_scbptr); 2260 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2261 ahd_outb(ahd, MSG_OUT, HOST_MSG); 2262 ahd_outb(ahd, SCSISIGO, last_phase|ATNO); 2263 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2264 wait = TRUE; 2265 } else if (disconnected) { 2266 2267 /* 2268 * Actually re-queue this SCB in an attempt 2269 * to select the device before it reconnects. 2270 */ 2271 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2272 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb)); 2273 pending_scb->hscb->cdb_len = 0; 2274 pending_scb->hscb->task_attribute = 0; 2275 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK; 2276 2277 if ((pending_scb->flags & SCB_PACKETIZED) != 0) { 2278 /* 2279 * Mark the SCB has having an outstanding 2280 * task management function. Should the command 2281 * complete normally before the task management 2282 * function can be sent, the host will be notified 2283 * to abort our requeued SCB. 2284 */ 2285 ahd_outb(ahd, SCB_TASK_MANAGEMENT, 2286 pending_scb->hscb->task_management); 2287 } else { 2288 /* 2289 * If non-packetized, set the MK_MESSAGE control 2290 * bit indicating that we desire to send a message. 2291 * We also set the disconnected flag since there is 2292 * no guarantee that our SCB control byte matches 2293 * the version on the card. We don't want the 2294 * sequencer to abort the command thinking an 2295 * unsolicited reselection occurred. 2296 */ 2297 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2298 2299 /* 2300 * The sequencer will never re-reference the 2301 * in-core SCB. To make sure we are notified 2302 * during reselection, set the MK_MESSAGE flag in 2303 * the card's copy of the SCB. 2304 */ 2305 ahd_outb(ahd, SCB_CONTROL, 2306 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE); 2307 } 2308 2309 /* 2310 * Clear out any entries in the QINFIFO first 2311 * so we are the next SCB for this target 2312 * to run. 2313 */ 2314 ahd_search_qinfifo(ahd, cmd->device->id, 2315 cmd->device->channel + 'A', cmd->device->lun, 2316 SCB_LIST_NULL, ROLE_INITIATOR, 2317 CAM_REQUEUE_REQ, SEARCH_COMPLETE); 2318 ahd_qinfifo_requeue_tail(ahd, pending_scb); 2319 ahd_set_scbptr(ahd, saved_scbptr); 2320 ahd_print_path(ahd, pending_scb); 2321 printk("Device is disconnected, re-queuing SCB\n"); 2322 wait = TRUE; 2323 } else { 2324 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2325 retval = FAILED; 2326 } 2327 2328 2329 ahd_restore_modes(ahd, saved_modes); 2330 done: 2331 if (paused) 2332 ahd_unpause(ahd); 2333 if (wait) { 2334 DECLARE_COMPLETION_ONSTACK(done); 2335 2336 ahd->platform_data->eh_done = &done; 2337 ahd_unlock(ahd, &flags); 2338 2339 printk("%s: Recovery code sleeping\n", ahd_name(ahd)); 2340 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2341 ahd_lock(ahd, &flags); 2342 ahd->platform_data->eh_done = NULL; 2343 ahd_unlock(ahd, &flags); 2344 printk("%s: Timer Expired (active %d)\n", 2345 ahd_name(ahd), dev->active); 2346 retval = FAILED; 2347 } 2348 printk("Recovery code awake\n"); 2349 } else 2350 ahd_unlock(ahd, &flags); 2351 2352 if (retval != SUCCESS) 2353 printk("%s: Command abort returning 0x%x\n", 2354 ahd_name(ahd), retval); 2355 2356 return retval; 2357 } 2358 2359 static void ahd_linux_set_width(struct scsi_target *starget, int width) 2360 { 2361 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2362 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2363 struct ahd_devinfo devinfo; 2364 unsigned long flags; 2365 2366 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2367 starget->channel + 'A', ROLE_INITIATOR); 2368 ahd_lock(ahd, &flags); 2369 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE); 2370 ahd_unlock(ahd, &flags); 2371 } 2372 2373 static void ahd_linux_set_period(struct scsi_target *starget, int period) 2374 { 2375 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2376 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2377 struct ahd_tmode_tstate *tstate; 2378 struct ahd_initiator_tinfo *tinfo 2379 = ahd_fetch_transinfo(ahd, 2380 starget->channel + 'A', 2381 shost->this_id, starget->id, &tstate); 2382 struct ahd_devinfo devinfo; 2383 unsigned int ppr_options = tinfo->goal.ppr_options; 2384 unsigned int dt; 2385 unsigned long flags; 2386 unsigned long offset = tinfo->goal.offset; 2387 2388 #ifdef AHD_DEBUG 2389 if ((ahd_debug & AHD_SHOW_DV) != 0) 2390 printk("%s: set period to %d\n", ahd_name(ahd), period); 2391 #endif 2392 if (offset == 0) 2393 offset = MAX_OFFSET; 2394 2395 if (period < 8) 2396 period = 8; 2397 if (period < 10) { 2398 if (spi_max_width(starget)) { 2399 ppr_options |= MSG_EXT_PPR_DT_REQ; 2400 if (period == 8) 2401 ppr_options |= MSG_EXT_PPR_IU_REQ; 2402 } else 2403 period = 10; 2404 } 2405 2406 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2407 2408 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2409 starget->channel + 'A', ROLE_INITIATOR); 2410 2411 /* all PPR requests apart from QAS require wide transfers */ 2412 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2413 if (spi_width(starget) == 0) 2414 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2415 } 2416 2417 ahd_find_syncrate(ahd, &period, &ppr_options, 2418 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2419 2420 ahd_lock(ahd, &flags); 2421 ahd_set_syncrate(ahd, &devinfo, period, offset, 2422 ppr_options, AHD_TRANS_GOAL, FALSE); 2423 ahd_unlock(ahd, &flags); 2424 } 2425 2426 static void ahd_linux_set_offset(struct scsi_target *starget, int offset) 2427 { 2428 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2429 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2430 struct ahd_tmode_tstate *tstate; 2431 struct ahd_initiator_tinfo *tinfo 2432 = ahd_fetch_transinfo(ahd, 2433 starget->channel + 'A', 2434 shost->this_id, starget->id, &tstate); 2435 struct ahd_devinfo devinfo; 2436 unsigned int ppr_options = 0; 2437 unsigned int period = 0; 2438 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2439 unsigned long flags; 2440 2441 #ifdef AHD_DEBUG 2442 if ((ahd_debug & AHD_SHOW_DV) != 0) 2443 printk("%s: set offset to %d\n", ahd_name(ahd), offset); 2444 #endif 2445 2446 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2447 starget->channel + 'A', ROLE_INITIATOR); 2448 if (offset != 0) { 2449 period = tinfo->goal.period; 2450 ppr_options = tinfo->goal.ppr_options; 2451 ahd_find_syncrate(ahd, &period, &ppr_options, 2452 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2453 } 2454 2455 ahd_lock(ahd, &flags); 2456 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options, 2457 AHD_TRANS_GOAL, FALSE); 2458 ahd_unlock(ahd, &flags); 2459 } 2460 2461 static void ahd_linux_set_dt(struct scsi_target *starget, int dt) 2462 { 2463 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2464 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2465 struct ahd_tmode_tstate *tstate; 2466 struct ahd_initiator_tinfo *tinfo 2467 = ahd_fetch_transinfo(ahd, 2468 starget->channel + 'A', 2469 shost->this_id, starget->id, &tstate); 2470 struct ahd_devinfo devinfo; 2471 unsigned int ppr_options = tinfo->goal.ppr_options 2472 & ~MSG_EXT_PPR_DT_REQ; 2473 unsigned int period = tinfo->goal.period; 2474 unsigned int width = tinfo->goal.width; 2475 unsigned long flags; 2476 2477 #ifdef AHD_DEBUG 2478 if ((ahd_debug & AHD_SHOW_DV) != 0) 2479 printk("%s: %s DT\n", ahd_name(ahd), 2480 dt ? "enabling" : "disabling"); 2481 #endif 2482 if (dt && spi_max_width(starget)) { 2483 ppr_options |= MSG_EXT_PPR_DT_REQ; 2484 if (!width) 2485 ahd_linux_set_width(starget, 1); 2486 } else { 2487 if (period <= 9) 2488 period = 10; /* If resetting DT, period must be >= 25ns */ 2489 /* IU is invalid without DT set */ 2490 ppr_options &= ~MSG_EXT_PPR_IU_REQ; 2491 } 2492 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2493 starget->channel + 'A', ROLE_INITIATOR); 2494 ahd_find_syncrate(ahd, &period, &ppr_options, 2495 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2496 2497 ahd_lock(ahd, &flags); 2498 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2499 ppr_options, AHD_TRANS_GOAL, FALSE); 2500 ahd_unlock(ahd, &flags); 2501 } 2502 2503 static void ahd_linux_set_qas(struct scsi_target *starget, int qas) 2504 { 2505 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2506 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2507 struct ahd_tmode_tstate *tstate; 2508 struct ahd_initiator_tinfo *tinfo 2509 = ahd_fetch_transinfo(ahd, 2510 starget->channel + 'A', 2511 shost->this_id, starget->id, &tstate); 2512 struct ahd_devinfo devinfo; 2513 unsigned int ppr_options = tinfo->goal.ppr_options 2514 & ~MSG_EXT_PPR_QAS_REQ; 2515 unsigned int period = tinfo->goal.period; 2516 unsigned int dt; 2517 unsigned long flags; 2518 2519 #ifdef AHD_DEBUG 2520 if ((ahd_debug & AHD_SHOW_DV) != 0) 2521 printk("%s: %s QAS\n", ahd_name(ahd), 2522 qas ? "enabling" : "disabling"); 2523 #endif 2524 2525 if (qas) { 2526 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2527 } 2528 2529 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2530 2531 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2532 starget->channel + 'A', ROLE_INITIATOR); 2533 ahd_find_syncrate(ahd, &period, &ppr_options, 2534 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2535 2536 ahd_lock(ahd, &flags); 2537 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2538 ppr_options, AHD_TRANS_GOAL, FALSE); 2539 ahd_unlock(ahd, &flags); 2540 } 2541 2542 static void ahd_linux_set_iu(struct scsi_target *starget, int iu) 2543 { 2544 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2545 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2546 struct ahd_tmode_tstate *tstate; 2547 struct ahd_initiator_tinfo *tinfo 2548 = ahd_fetch_transinfo(ahd, 2549 starget->channel + 'A', 2550 shost->this_id, starget->id, &tstate); 2551 struct ahd_devinfo devinfo; 2552 unsigned int ppr_options = tinfo->goal.ppr_options 2553 & ~MSG_EXT_PPR_IU_REQ; 2554 unsigned int period = tinfo->goal.period; 2555 unsigned int dt; 2556 unsigned long flags; 2557 2558 #ifdef AHD_DEBUG 2559 if ((ahd_debug & AHD_SHOW_DV) != 0) 2560 printk("%s: %s IU\n", ahd_name(ahd), 2561 iu ? "enabling" : "disabling"); 2562 #endif 2563 2564 if (iu && spi_max_width(starget)) { 2565 ppr_options |= MSG_EXT_PPR_IU_REQ; 2566 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */ 2567 } 2568 2569 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2570 2571 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2572 starget->channel + 'A', ROLE_INITIATOR); 2573 ahd_find_syncrate(ahd, &period, &ppr_options, 2574 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2575 2576 ahd_lock(ahd, &flags); 2577 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2578 ppr_options, AHD_TRANS_GOAL, FALSE); 2579 ahd_unlock(ahd, &flags); 2580 } 2581 2582 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm) 2583 { 2584 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2585 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2586 struct ahd_tmode_tstate *tstate; 2587 struct ahd_initiator_tinfo *tinfo 2588 = ahd_fetch_transinfo(ahd, 2589 starget->channel + 'A', 2590 shost->this_id, starget->id, &tstate); 2591 struct ahd_devinfo devinfo; 2592 unsigned int ppr_options = tinfo->goal.ppr_options 2593 & ~MSG_EXT_PPR_RD_STRM; 2594 unsigned int period = tinfo->goal.period; 2595 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2596 unsigned long flags; 2597 2598 #ifdef AHD_DEBUG 2599 if ((ahd_debug & AHD_SHOW_DV) != 0) 2600 printk("%s: %s Read Streaming\n", ahd_name(ahd), 2601 rdstrm ? "enabling" : "disabling"); 2602 #endif 2603 2604 if (rdstrm && spi_max_width(starget)) 2605 ppr_options |= MSG_EXT_PPR_RD_STRM; 2606 2607 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2608 starget->channel + 'A', ROLE_INITIATOR); 2609 ahd_find_syncrate(ahd, &period, &ppr_options, 2610 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2611 2612 ahd_lock(ahd, &flags); 2613 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2614 ppr_options, AHD_TRANS_GOAL, FALSE); 2615 ahd_unlock(ahd, &flags); 2616 } 2617 2618 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow) 2619 { 2620 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2621 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2622 struct ahd_tmode_tstate *tstate; 2623 struct ahd_initiator_tinfo *tinfo 2624 = ahd_fetch_transinfo(ahd, 2625 starget->channel + 'A', 2626 shost->this_id, starget->id, &tstate); 2627 struct ahd_devinfo devinfo; 2628 unsigned int ppr_options = tinfo->goal.ppr_options 2629 & ~MSG_EXT_PPR_WR_FLOW; 2630 unsigned int period = tinfo->goal.period; 2631 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2632 unsigned long flags; 2633 2634 #ifdef AHD_DEBUG 2635 if ((ahd_debug & AHD_SHOW_DV) != 0) 2636 printk("%s: %s Write Flow Control\n", ahd_name(ahd), 2637 wrflow ? "enabling" : "disabling"); 2638 #endif 2639 2640 if (wrflow && spi_max_width(starget)) 2641 ppr_options |= MSG_EXT_PPR_WR_FLOW; 2642 2643 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2644 starget->channel + 'A', ROLE_INITIATOR); 2645 ahd_find_syncrate(ahd, &period, &ppr_options, 2646 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2647 2648 ahd_lock(ahd, &flags); 2649 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2650 ppr_options, AHD_TRANS_GOAL, FALSE); 2651 ahd_unlock(ahd, &flags); 2652 } 2653 2654 static void ahd_linux_set_rti(struct scsi_target *starget, int rti) 2655 { 2656 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2657 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2658 struct ahd_tmode_tstate *tstate; 2659 struct ahd_initiator_tinfo *tinfo 2660 = ahd_fetch_transinfo(ahd, 2661 starget->channel + 'A', 2662 shost->this_id, starget->id, &tstate); 2663 struct ahd_devinfo devinfo; 2664 unsigned int ppr_options = tinfo->goal.ppr_options 2665 & ~MSG_EXT_PPR_RTI; 2666 unsigned int period = tinfo->goal.period; 2667 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2668 unsigned long flags; 2669 2670 if ((ahd->features & AHD_RTI) == 0) { 2671 #ifdef AHD_DEBUG 2672 if ((ahd_debug & AHD_SHOW_DV) != 0) 2673 printk("%s: RTI not available\n", ahd_name(ahd)); 2674 #endif 2675 return; 2676 } 2677 2678 #ifdef AHD_DEBUG 2679 if ((ahd_debug & AHD_SHOW_DV) != 0) 2680 printk("%s: %s RTI\n", ahd_name(ahd), 2681 rti ? "enabling" : "disabling"); 2682 #endif 2683 2684 if (rti && spi_max_width(starget)) 2685 ppr_options |= MSG_EXT_PPR_RTI; 2686 2687 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2688 starget->channel + 'A', ROLE_INITIATOR); 2689 ahd_find_syncrate(ahd, &period, &ppr_options, 2690 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2691 2692 ahd_lock(ahd, &flags); 2693 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2694 ppr_options, AHD_TRANS_GOAL, FALSE); 2695 ahd_unlock(ahd, &flags); 2696 } 2697 2698 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp) 2699 { 2700 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2701 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2702 struct ahd_tmode_tstate *tstate; 2703 struct ahd_initiator_tinfo *tinfo 2704 = ahd_fetch_transinfo(ahd, 2705 starget->channel + 'A', 2706 shost->this_id, starget->id, &tstate); 2707 struct ahd_devinfo devinfo; 2708 unsigned int ppr_options = tinfo->goal.ppr_options 2709 & ~MSG_EXT_PPR_PCOMP_EN; 2710 unsigned int period = tinfo->goal.period; 2711 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2712 unsigned long flags; 2713 2714 #ifdef AHD_DEBUG 2715 if ((ahd_debug & AHD_SHOW_DV) != 0) 2716 printk("%s: %s Precompensation\n", ahd_name(ahd), 2717 pcomp ? "Enable" : "Disable"); 2718 #endif 2719 2720 if (pcomp && spi_max_width(starget)) { 2721 uint8_t precomp; 2722 2723 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 2724 const struct ahd_linux_iocell_opts *iocell_opts; 2725 2726 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 2727 precomp = iocell_opts->precomp; 2728 } else { 2729 precomp = AIC79XX_DEFAULT_PRECOMP; 2730 } 2731 ppr_options |= MSG_EXT_PPR_PCOMP_EN; 2732 AHD_SET_PRECOMP(ahd, precomp); 2733 } else { 2734 AHD_SET_PRECOMP(ahd, 0); 2735 } 2736 2737 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2738 starget->channel + 'A', ROLE_INITIATOR); 2739 ahd_find_syncrate(ahd, &period, &ppr_options, 2740 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2741 2742 ahd_lock(ahd, &flags); 2743 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2744 ppr_options, AHD_TRANS_GOAL, FALSE); 2745 ahd_unlock(ahd, &flags); 2746 } 2747 2748 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold) 2749 { 2750 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2751 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2752 struct ahd_tmode_tstate *tstate; 2753 struct ahd_initiator_tinfo *tinfo 2754 = ahd_fetch_transinfo(ahd, 2755 starget->channel + 'A', 2756 shost->this_id, starget->id, &tstate); 2757 struct ahd_devinfo devinfo; 2758 unsigned int ppr_options = tinfo->goal.ppr_options 2759 & ~MSG_EXT_PPR_HOLD_MCS; 2760 unsigned int period = tinfo->goal.period; 2761 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2762 unsigned long flags; 2763 2764 if (hold && spi_max_width(starget)) 2765 ppr_options |= MSG_EXT_PPR_HOLD_MCS; 2766 2767 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2768 starget->channel + 'A', ROLE_INITIATOR); 2769 ahd_find_syncrate(ahd, &period, &ppr_options, 2770 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2771 2772 ahd_lock(ahd, &flags); 2773 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2774 ppr_options, AHD_TRANS_GOAL, FALSE); 2775 ahd_unlock(ahd, &flags); 2776 } 2777 2778 static void ahd_linux_get_signalling(struct Scsi_Host *shost) 2779 { 2780 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata; 2781 unsigned long flags; 2782 u8 mode; 2783 2784 ahd_lock(ahd, &flags); 2785 ahd_pause(ahd); 2786 mode = ahd_inb(ahd, SBLKCTL); 2787 ahd_unpause(ahd); 2788 ahd_unlock(ahd, &flags); 2789 2790 if (mode & ENAB40) 2791 spi_signalling(shost) = SPI_SIGNAL_LVD; 2792 else if (mode & ENAB20) 2793 spi_signalling(shost) = SPI_SIGNAL_SE; 2794 else 2795 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2796 } 2797 2798 static struct spi_function_template ahd_linux_transport_functions = { 2799 .set_offset = ahd_linux_set_offset, 2800 .show_offset = 1, 2801 .set_period = ahd_linux_set_period, 2802 .show_period = 1, 2803 .set_width = ahd_linux_set_width, 2804 .show_width = 1, 2805 .set_dt = ahd_linux_set_dt, 2806 .show_dt = 1, 2807 .set_iu = ahd_linux_set_iu, 2808 .show_iu = 1, 2809 .set_qas = ahd_linux_set_qas, 2810 .show_qas = 1, 2811 .set_rd_strm = ahd_linux_set_rd_strm, 2812 .show_rd_strm = 1, 2813 .set_wr_flow = ahd_linux_set_wr_flow, 2814 .show_wr_flow = 1, 2815 .set_rti = ahd_linux_set_rti, 2816 .show_rti = 1, 2817 .set_pcomp_en = ahd_linux_set_pcomp_en, 2818 .show_pcomp_en = 1, 2819 .set_hold_mcs = ahd_linux_set_hold_mcs, 2820 .show_hold_mcs = 1, 2821 .get_signalling = ahd_linux_get_signalling, 2822 }; 2823 2824 static int __init 2825 ahd_linux_init(void) 2826 { 2827 int error = 0; 2828 2829 /* 2830 * If we've been passed any parameters, process them now. 2831 */ 2832 if (aic79xx) 2833 aic79xx_setup(aic79xx); 2834 2835 ahd_linux_transport_template = 2836 spi_attach_transport(&ahd_linux_transport_functions); 2837 if (!ahd_linux_transport_template) 2838 return -ENODEV; 2839 2840 scsi_transport_reserve_device(ahd_linux_transport_template, 2841 sizeof(struct ahd_linux_device)); 2842 2843 error = ahd_linux_pci_init(); 2844 if (error) 2845 spi_release_transport(ahd_linux_transport_template); 2846 return error; 2847 } 2848 2849 static void __exit 2850 ahd_linux_exit(void) 2851 { 2852 ahd_linux_pci_exit(); 2853 spi_release_transport(ahd_linux_transport_template); 2854 } 2855 2856 module_init(ahd_linux_init); 2857 module_exit(ahd_linux_exit); 2858