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 /* 50 * Include aiclib.c as part of our 51 * "module dependencies are hard" work around. 52 */ 53 #include "aiclib.c" 54 55 #include <linux/init.h> /* __setup */ 56 57 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) 58 #include "sd.h" /* For geometry detection */ 59 #endif 60 61 #include <linux/mm.h> /* For fetching system memory size */ 62 #include <linux/delay.h> /* For ssleep/msleep */ 63 64 /* 65 * Lock protecting manipulation of the ahd softc list. 66 */ 67 spinlock_t ahd_list_spinlock; 68 69 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) 70 /* For dynamic sglist size calculation. */ 71 u_int ahd_linux_nseg; 72 #endif 73 74 /* 75 * Bucket size for counting good commands in between bad ones. 76 */ 77 #define AHD_LINUX_ERR_THRESH 1000 78 79 /* 80 * Set this to the delay in seconds after SCSI bus reset. 81 * Note, we honor this only for the initial bus reset. 82 * The scsi error recovery code performs its own bus settle 83 * delay handling for error recovery actions. 84 */ 85 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS 86 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS 87 #else 88 #define AIC79XX_RESET_DELAY 5000 89 #endif 90 91 /* 92 * To change the default number of tagged transactions allowed per-device, 93 * add a line to the lilo.conf file like: 94 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" 95 * which will result in the first four devices on the first two 96 * controllers being set to a tagged queue depth of 32. 97 * 98 * The tag_commands is an array of 16 to allow for wide and twin adapters. 99 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 100 * for channel 1. 101 */ 102 typedef struct { 103 uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */ 104 } adapter_tag_info_t; 105 106 /* 107 * Modify this as you see fit for your system. 108 * 109 * 0 tagged queuing disabled 110 * 1 <= n <= 253 n == max tags ever dispatched. 111 * 112 * The driver will throttle the number of commands dispatched to a 113 * device if it returns queue full. For devices with a fixed maximum 114 * queue depth, the driver will eventually determine this depth and 115 * lock it in (a console message is printed to indicate that a lock 116 * has occurred). On some devices, queue full is returned for a temporary 117 * resource shortage. These devices will return queue full at varying 118 * depths. The driver will throttle back when the queue fulls occur and 119 * attempt to slowly increase the depth over time as the device recovers 120 * from the resource shortage. 121 * 122 * In this example, the first line will disable tagged queueing for all 123 * the devices on the first probed aic79xx adapter. 124 * 125 * The second line enables tagged queueing with 4 commands/LUN for IDs 126 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the 127 * driver to attempt to use up to 64 tags for ID 1. 128 * 129 * The third line is the same as the first line. 130 * 131 * The fourth line disables tagged queueing for devices 0 and 3. It 132 * enables tagged queueing for the other IDs, with 16 commands/LUN 133 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for 134 * IDs 2, 5-7, and 9-15. 135 */ 136 137 /* 138 * NOTE: The below structure is for reference only, the actual structure 139 * to modify in order to change things is just below this comment block. 140 adapter_tag_info_t aic79xx_tag_info[] = 141 { 142 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 143 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, 144 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 145 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} 146 }; 147 */ 148 149 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE 150 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE 151 #else 152 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE 153 #endif 154 155 #define AIC79XX_CONFIGED_TAG_COMMANDS { \ 156 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 157 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 158 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 159 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 160 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 161 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 162 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 163 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \ 164 } 165 166 /* 167 * By default, use the number of commands specified by 168 * the users kernel configuration. 169 */ 170 static adapter_tag_info_t aic79xx_tag_info[] = 171 { 172 {AIC79XX_CONFIGED_TAG_COMMANDS}, 173 {AIC79XX_CONFIGED_TAG_COMMANDS}, 174 {AIC79XX_CONFIGED_TAG_COMMANDS}, 175 {AIC79XX_CONFIGED_TAG_COMMANDS}, 176 {AIC79XX_CONFIGED_TAG_COMMANDS}, 177 {AIC79XX_CONFIGED_TAG_COMMANDS}, 178 {AIC79XX_CONFIGED_TAG_COMMANDS}, 179 {AIC79XX_CONFIGED_TAG_COMMANDS}, 180 {AIC79XX_CONFIGED_TAG_COMMANDS}, 181 {AIC79XX_CONFIGED_TAG_COMMANDS}, 182 {AIC79XX_CONFIGED_TAG_COMMANDS}, 183 {AIC79XX_CONFIGED_TAG_COMMANDS}, 184 {AIC79XX_CONFIGED_TAG_COMMANDS}, 185 {AIC79XX_CONFIGED_TAG_COMMANDS}, 186 {AIC79XX_CONFIGED_TAG_COMMANDS}, 187 {AIC79XX_CONFIGED_TAG_COMMANDS} 188 }; 189 190 /* 191 * By default, read streaming is disabled. In theory, 192 * read streaming should enhance performance, but early 193 * U320 drive firmware actually performs slower with 194 * read streaming enabled. 195 */ 196 #ifdef CONFIG_AIC79XX_ENABLE_RD_STRM 197 #define AIC79XX_CONFIGED_RD_STRM 0xFFFF 198 #else 199 #define AIC79XX_CONFIGED_RD_STRM 0 200 #endif 201 202 static uint16_t aic79xx_rd_strm_info[] = 203 { 204 AIC79XX_CONFIGED_RD_STRM, 205 AIC79XX_CONFIGED_RD_STRM, 206 AIC79XX_CONFIGED_RD_STRM, 207 AIC79XX_CONFIGED_RD_STRM, 208 AIC79XX_CONFIGED_RD_STRM, 209 AIC79XX_CONFIGED_RD_STRM, 210 AIC79XX_CONFIGED_RD_STRM, 211 AIC79XX_CONFIGED_RD_STRM, 212 AIC79XX_CONFIGED_RD_STRM, 213 AIC79XX_CONFIGED_RD_STRM, 214 AIC79XX_CONFIGED_RD_STRM, 215 AIC79XX_CONFIGED_RD_STRM, 216 AIC79XX_CONFIGED_RD_STRM, 217 AIC79XX_CONFIGED_RD_STRM, 218 AIC79XX_CONFIGED_RD_STRM, 219 AIC79XX_CONFIGED_RD_STRM 220 }; 221 222 /* 223 * DV option: 224 * 225 * positive value = DV Enabled 226 * zero = DV Disabled 227 * negative value = DV Default for adapter type/seeprom 228 */ 229 #ifdef CONFIG_AIC79XX_DV_SETTING 230 #define AIC79XX_CONFIGED_DV CONFIG_AIC79XX_DV_SETTING 231 #else 232 #define AIC79XX_CONFIGED_DV -1 233 #endif 234 235 static int8_t aic79xx_dv_settings[] = 236 { 237 AIC79XX_CONFIGED_DV, 238 AIC79XX_CONFIGED_DV, 239 AIC79XX_CONFIGED_DV, 240 AIC79XX_CONFIGED_DV, 241 AIC79XX_CONFIGED_DV, 242 AIC79XX_CONFIGED_DV, 243 AIC79XX_CONFIGED_DV, 244 AIC79XX_CONFIGED_DV, 245 AIC79XX_CONFIGED_DV, 246 AIC79XX_CONFIGED_DV, 247 AIC79XX_CONFIGED_DV, 248 AIC79XX_CONFIGED_DV, 249 AIC79XX_CONFIGED_DV, 250 AIC79XX_CONFIGED_DV, 251 AIC79XX_CONFIGED_DV, 252 AIC79XX_CONFIGED_DV 253 }; 254 255 /* 256 * The I/O cell on the chip is very configurable in respect to its analog 257 * characteristics. Set the defaults here; they can be overriden with 258 * the proper insmod parameters. 259 */ 260 struct ahd_linux_iocell_opts 261 { 262 uint8_t precomp; 263 uint8_t slewrate; 264 uint8_t amplitude; 265 }; 266 #define AIC79XX_DEFAULT_PRECOMP 0xFF 267 #define AIC79XX_DEFAULT_SLEWRATE 0xFF 268 #define AIC79XX_DEFAULT_AMPLITUDE 0xFF 269 #define AIC79XX_DEFAULT_IOOPTS \ 270 { \ 271 AIC79XX_DEFAULT_PRECOMP, \ 272 AIC79XX_DEFAULT_SLEWRATE, \ 273 AIC79XX_DEFAULT_AMPLITUDE \ 274 } 275 #define AIC79XX_PRECOMP_INDEX 0 276 #define AIC79XX_SLEWRATE_INDEX 1 277 #define AIC79XX_AMPLITUDE_INDEX 2 278 static struct ahd_linux_iocell_opts aic79xx_iocell_info[] = 279 { 280 AIC79XX_DEFAULT_IOOPTS, 281 AIC79XX_DEFAULT_IOOPTS, 282 AIC79XX_DEFAULT_IOOPTS, 283 AIC79XX_DEFAULT_IOOPTS, 284 AIC79XX_DEFAULT_IOOPTS, 285 AIC79XX_DEFAULT_IOOPTS, 286 AIC79XX_DEFAULT_IOOPTS, 287 AIC79XX_DEFAULT_IOOPTS, 288 AIC79XX_DEFAULT_IOOPTS, 289 AIC79XX_DEFAULT_IOOPTS, 290 AIC79XX_DEFAULT_IOOPTS, 291 AIC79XX_DEFAULT_IOOPTS, 292 AIC79XX_DEFAULT_IOOPTS, 293 AIC79XX_DEFAULT_IOOPTS, 294 AIC79XX_DEFAULT_IOOPTS, 295 AIC79XX_DEFAULT_IOOPTS 296 }; 297 298 /* 299 * There should be a specific return value for this in scsi.h, but 300 * it seems that most drivers ignore it. 301 */ 302 #define DID_UNDERFLOW DID_ERROR 303 304 void 305 ahd_print_path(struct ahd_softc *ahd, struct scb *scb) 306 { 307 printk("(scsi%d:%c:%d:%d): ", 308 ahd->platform_data->host->host_no, 309 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X', 310 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1, 311 scb != NULL ? SCB_GET_LUN(scb) : -1); 312 } 313 314 /* 315 * XXX - these options apply unilaterally to _all_ adapters 316 * cards in the system. This should be fixed. Exceptions to this 317 * rule are noted in the comments. 318 */ 319 320 /* 321 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This 322 * has no effect on any later resets that might occur due to things like 323 * SCSI bus timeouts. 324 */ 325 static uint32_t aic79xx_no_reset; 326 327 /* 328 * Certain PCI motherboards will scan PCI devices from highest to lowest, 329 * others scan from lowest to highest, and they tend to do all kinds of 330 * strange things when they come into contact with PCI bridge chips. The 331 * net result of all this is that the PCI card that is actually used to boot 332 * the machine is very hard to detect. Most motherboards go from lowest 333 * PCI slot number to highest, and the first SCSI controller found is the 334 * one you boot from. The only exceptions to this are when a controller 335 * has its BIOS disabled. So, we by default sort all of our SCSI controllers 336 * from lowest PCI slot number to highest PCI slot number. We also force 337 * all controllers with their BIOS disabled to the end of the list. This 338 * works on *almost* all computers. Where it doesn't work, we have this 339 * option. Setting this option to non-0 will reverse the order of the sort 340 * to highest first, then lowest, but will still leave cards with their BIOS 341 * disabled at the very end. That should fix everyone up unless there are 342 * really strange cirumstances. 343 */ 344 static uint32_t aic79xx_reverse_scan; 345 346 /* 347 * Should we force EXTENDED translation on a controller. 348 * 0 == Use whatever is in the SEEPROM or default to off 349 * 1 == Use whatever is in the SEEPROM or default to on 350 */ 351 static uint32_t aic79xx_extended; 352 353 /* 354 * PCI bus parity checking of the Adaptec controllers. This is somewhat 355 * dubious at best. To my knowledge, this option has never actually 356 * solved a PCI parity problem, but on certain machines with broken PCI 357 * chipset configurations, it can generate tons of false error messages. 358 * It's included in the driver for completeness. 359 * 0 = Shut off PCI parity check 360 * non-0 = Enable PCI parity check 361 * 362 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this 363 * variable to -1 you would actually want to simply pass the variable 364 * name without a number. That will invert the 0 which will result in 365 * -1. 366 */ 367 static uint32_t aic79xx_pci_parity = ~0; 368 369 /* 370 * There are lots of broken chipsets in the world. Some of them will 371 * violate the PCI spec when we issue byte sized memory writes to our 372 * controller. I/O mapped register access, if allowed by the given 373 * platform, will work in almost all cases. 374 */ 375 uint32_t aic79xx_allow_memio = ~0; 376 377 /* 378 * aic79xx_detect() has been run, so register all device arrivals 379 * immediately with the system rather than deferring to the sorted 380 * attachment performed by aic79xx_detect(). 381 */ 382 int aic79xx_detect_complete; 383 384 /* 385 * So that we can set how long each device is given as a selection timeout. 386 * The table of values goes like this: 387 * 0 - 256ms 388 * 1 - 128ms 389 * 2 - 64ms 390 * 3 - 32ms 391 * We default to 256ms because some older devices need a longer time 392 * to respond to initial selection. 393 */ 394 static uint32_t aic79xx_seltime; 395 396 /* 397 * Certain devices do not perform any aging on commands. Should the 398 * device be saturated by commands in one portion of the disk, it is 399 * possible for transactions on far away sectors to never be serviced. 400 * To handle these devices, we can periodically send an ordered tag to 401 * force all outstanding transactions to be serviced prior to a new 402 * transaction. 403 */ 404 uint32_t aic79xx_periodic_otag; 405 406 /* 407 * Module information and settable options. 408 */ 409 static char *aic79xx = NULL; 410 411 MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>"); 412 MODULE_DESCRIPTION("Adaptec Aic790X U320 SCSI Host Bus Adapter driver"); 413 MODULE_LICENSE("Dual BSD/GPL"); 414 MODULE_VERSION(AIC79XX_DRIVER_VERSION); 415 module_param(aic79xx, charp, 0); 416 MODULE_PARM_DESC(aic79xx, 417 "period delimited, options string.\n" 418 " verbose Enable verbose/diagnostic logging\n" 419 " allow_memio Allow device registers to be memory mapped\n" 420 " debug Bitmask of debug values to enable\n" 421 " no_reset Supress initial bus resets\n" 422 " extended Enable extended geometry on all controllers\n" 423 " periodic_otag Send an ordered tagged transaction\n" 424 " periodically to prevent tag starvation.\n" 425 " This may be required by some older disk\n" 426 " or drives/RAID arrays.\n" 427 " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n" 428 " tag_info:<tag_str> Set per-target tag depth\n" 429 " global_tag_depth:<int> Global tag depth for all targets on all buses\n" 430 " rd_strm:<rd_strm_masks> Set per-target read streaming setting.\n" 431 " dv:<dv_settings> Set per-controller Domain Validation Setting.\n" 432 " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n" 433 " precomp:<pcomp_list> Set the signal precompensation (0-7).\n" 434 " amplitude:<int> Set the signal amplitude (0-7).\n" 435 " seltime:<int> Selection Timeout:\n" 436 " (0/256ms,1/128ms,2/64ms,3/32ms)\n" 437 "\n" 438 " Sample /etc/modprobe.conf line:\n" 439 " Enable verbose logging\n" 440 " Set tag depth on Controller 2/Target 2 to 10 tags\n" 441 " Shorten the selection timeout to 128ms\n" 442 "\n" 443 " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n" 444 "\n" 445 " Sample /etc/modprobe.conf line:\n" 446 " Change Read Streaming for Controller's 2 and 3\n" 447 "\n" 448 " options aic79xx 'aic79xx=rd_strm:{..0xFFF0.0xC0F0}'"); 449 450 static void ahd_linux_handle_scsi_status(struct ahd_softc *, 451 struct ahd_linux_device *, 452 struct scb *); 453 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, 454 Scsi_Cmnd *cmd); 455 static void ahd_linux_filter_inquiry(struct ahd_softc *ahd, 456 struct ahd_devinfo *devinfo); 457 static void ahd_linux_dev_timed_unfreeze(u_long arg); 458 static void ahd_linux_sem_timeout(u_long arg); 459 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd); 460 static void ahd_linux_size_nseg(void); 461 static void ahd_linux_thread_run_complete_queue(struct ahd_softc *ahd); 462 static void ahd_linux_start_dv(struct ahd_softc *ahd); 463 static void ahd_linux_dv_timeout(struct scsi_cmnd *cmd); 464 static int ahd_linux_dv_thread(void *data); 465 static void ahd_linux_kill_dv_thread(struct ahd_softc *ahd); 466 static void ahd_linux_dv_target(struct ahd_softc *ahd, u_int target); 467 static void ahd_linux_dv_transition(struct ahd_softc *ahd, 468 struct scsi_cmnd *cmd, 469 struct ahd_devinfo *devinfo, 470 struct ahd_linux_target *targ); 471 static void ahd_linux_dv_fill_cmd(struct ahd_softc *ahd, 472 struct scsi_cmnd *cmd, 473 struct ahd_devinfo *devinfo); 474 static void ahd_linux_dv_inq(struct ahd_softc *ahd, 475 struct scsi_cmnd *cmd, 476 struct ahd_devinfo *devinfo, 477 struct ahd_linux_target *targ, 478 u_int request_length); 479 static void ahd_linux_dv_tur(struct ahd_softc *ahd, 480 struct scsi_cmnd *cmd, 481 struct ahd_devinfo *devinfo); 482 static void ahd_linux_dv_rebd(struct ahd_softc *ahd, 483 struct scsi_cmnd *cmd, 484 struct ahd_devinfo *devinfo, 485 struct ahd_linux_target *targ); 486 static void ahd_linux_dv_web(struct ahd_softc *ahd, 487 struct scsi_cmnd *cmd, 488 struct ahd_devinfo *devinfo, 489 struct ahd_linux_target *targ); 490 static void ahd_linux_dv_reb(struct ahd_softc *ahd, 491 struct scsi_cmnd *cmd, 492 struct ahd_devinfo *devinfo, 493 struct ahd_linux_target *targ); 494 static void ahd_linux_dv_su(struct ahd_softc *ahd, 495 struct scsi_cmnd *cmd, 496 struct ahd_devinfo *devinfo, 497 struct ahd_linux_target *targ); 498 static int ahd_linux_fallback(struct ahd_softc *ahd, 499 struct ahd_devinfo *devinfo); 500 static __inline int ahd_linux_dv_fallback(struct ahd_softc *ahd, 501 struct ahd_devinfo *devinfo); 502 static void ahd_linux_dv_complete(Scsi_Cmnd *cmd); 503 static void ahd_linux_generate_dv_pattern(struct ahd_linux_target *targ); 504 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd, 505 struct ahd_devinfo *devinfo); 506 static u_int ahd_linux_user_dv_setting(struct ahd_softc *ahd); 507 static void ahd_linux_setup_user_rd_strm_settings(struct ahd_softc *ahd); 508 static void ahd_linux_device_queue_depth(struct ahd_softc *ahd, 509 struct ahd_linux_device *dev); 510 static struct ahd_linux_target* ahd_linux_alloc_target(struct ahd_softc*, 511 u_int, u_int); 512 static void ahd_linux_free_target(struct ahd_softc*, 513 struct ahd_linux_target*); 514 static struct ahd_linux_device* ahd_linux_alloc_device(struct ahd_softc*, 515 struct ahd_linux_target*, 516 u_int); 517 static void ahd_linux_free_device(struct ahd_softc*, 518 struct ahd_linux_device*); 519 static void ahd_linux_run_device_queue(struct ahd_softc*, 520 struct ahd_linux_device*); 521 static void ahd_linux_setup_tag_info_global(char *p); 522 static aic_option_callback_t ahd_linux_setup_tag_info; 523 static aic_option_callback_t ahd_linux_setup_rd_strm_info; 524 static aic_option_callback_t ahd_linux_setup_dv; 525 static aic_option_callback_t ahd_linux_setup_iocell_info; 526 static int ahd_linux_next_unit(void); 527 static void ahd_runq_tasklet(unsigned long data); 528 static int aic79xx_setup(char *c); 529 530 /****************************** Inlines ***************************************/ 531 static __inline void ahd_schedule_completeq(struct ahd_softc *ahd); 532 static __inline void ahd_schedule_runq(struct ahd_softc *ahd); 533 static __inline void ahd_setup_runq_tasklet(struct ahd_softc *ahd); 534 static __inline void ahd_teardown_runq_tasklet(struct ahd_softc *ahd); 535 static __inline struct ahd_linux_device* 536 ahd_linux_get_device(struct ahd_softc *ahd, u_int channel, 537 u_int target, u_int lun, int alloc); 538 static struct ahd_cmd *ahd_linux_run_complete_queue(struct ahd_softc *ahd); 539 static __inline void ahd_linux_check_device_queue(struct ahd_softc *ahd, 540 struct ahd_linux_device *dev); 541 static __inline struct ahd_linux_device * 542 ahd_linux_next_device_to_run(struct ahd_softc *ahd); 543 static __inline void ahd_linux_run_device_queues(struct ahd_softc *ahd); 544 static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*); 545 546 static __inline void 547 ahd_schedule_completeq(struct ahd_softc *ahd) 548 { 549 if ((ahd->platform_data->flags & AHD_RUN_CMPLT_Q_TIMER) == 0) { 550 ahd->platform_data->flags |= AHD_RUN_CMPLT_Q_TIMER; 551 ahd->platform_data->completeq_timer.expires = jiffies; 552 add_timer(&ahd->platform_data->completeq_timer); 553 } 554 } 555 556 /* 557 * Must be called with our lock held. 558 */ 559 static __inline void 560 ahd_schedule_runq(struct ahd_softc *ahd) 561 { 562 tasklet_schedule(&ahd->platform_data->runq_tasklet); 563 } 564 565 static __inline 566 void ahd_setup_runq_tasklet(struct ahd_softc *ahd) 567 { 568 tasklet_init(&ahd->platform_data->runq_tasklet, ahd_runq_tasklet, 569 (unsigned long)ahd); 570 } 571 572 static __inline void 573 ahd_teardown_runq_tasklet(struct ahd_softc *ahd) 574 { 575 tasklet_kill(&ahd->platform_data->runq_tasklet); 576 } 577 578 static __inline struct ahd_linux_device* 579 ahd_linux_get_device(struct ahd_softc *ahd, u_int channel, u_int target, 580 u_int lun, int alloc) 581 { 582 struct ahd_linux_target *targ; 583 struct ahd_linux_device *dev; 584 u_int target_offset; 585 586 target_offset = target; 587 if (channel != 0) 588 target_offset += 8; 589 targ = ahd->platform_data->targets[target_offset]; 590 if (targ == NULL) { 591 if (alloc != 0) { 592 targ = ahd_linux_alloc_target(ahd, channel, target); 593 if (targ == NULL) 594 return (NULL); 595 } else 596 return (NULL); 597 } 598 dev = targ->devices[lun]; 599 if (dev == NULL && alloc != 0) 600 dev = ahd_linux_alloc_device(ahd, targ, lun); 601 return (dev); 602 } 603 604 #define AHD_LINUX_MAX_RETURNED_ERRORS 4 605 static struct ahd_cmd * 606 ahd_linux_run_complete_queue(struct ahd_softc *ahd) 607 { 608 struct ahd_cmd *acmd; 609 u_long done_flags; 610 int with_errors; 611 612 with_errors = 0; 613 ahd_done_lock(ahd, &done_flags); 614 while ((acmd = TAILQ_FIRST(&ahd->platform_data->completeq)) != NULL) { 615 Scsi_Cmnd *cmd; 616 617 if (with_errors > AHD_LINUX_MAX_RETURNED_ERRORS) { 618 /* 619 * Linux uses stack recursion to requeue 620 * commands that need to be retried. Avoid 621 * blowing out the stack by "spoon feeding" 622 * commands that completed with error back 623 * the operating system in case they are going 624 * to be retried. "ick" 625 */ 626 ahd_schedule_completeq(ahd); 627 break; 628 } 629 TAILQ_REMOVE(&ahd->platform_data->completeq, 630 acmd, acmd_links.tqe); 631 cmd = &acmd_scsi_cmd(acmd); 632 cmd->host_scribble = NULL; 633 if (ahd_cmd_get_transaction_status(cmd) != DID_OK 634 || (cmd->result & 0xFF) != SCSI_STATUS_OK) 635 with_errors++; 636 637 cmd->scsi_done(cmd); 638 } 639 ahd_done_unlock(ahd, &done_flags); 640 return (acmd); 641 } 642 643 static __inline void 644 ahd_linux_check_device_queue(struct ahd_softc *ahd, 645 struct ahd_linux_device *dev) 646 { 647 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) != 0 648 && dev->active == 0) { 649 dev->flags &= ~AHD_DEV_FREEZE_TIL_EMPTY; 650 dev->qfrozen--; 651 } 652 653 if (TAILQ_FIRST(&dev->busyq) == NULL 654 || dev->openings == 0 || dev->qfrozen != 0) 655 return; 656 657 ahd_linux_run_device_queue(ahd, dev); 658 } 659 660 static __inline struct ahd_linux_device * 661 ahd_linux_next_device_to_run(struct ahd_softc *ahd) 662 { 663 664 if ((ahd->flags & AHD_RESOURCE_SHORTAGE) != 0 665 || (ahd->platform_data->qfrozen != 0 666 && AHD_DV_SIMQ_FROZEN(ahd) == 0)) 667 return (NULL); 668 return (TAILQ_FIRST(&ahd->platform_data->device_runq)); 669 } 670 671 static __inline void 672 ahd_linux_run_device_queues(struct ahd_softc *ahd) 673 { 674 struct ahd_linux_device *dev; 675 676 while ((dev = ahd_linux_next_device_to_run(ahd)) != NULL) { 677 TAILQ_REMOVE(&ahd->platform_data->device_runq, dev, links); 678 dev->flags &= ~AHD_DEV_ON_RUN_LIST; 679 ahd_linux_check_device_queue(ahd, dev); 680 } 681 } 682 683 static __inline void 684 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb) 685 { 686 Scsi_Cmnd *cmd; 687 int direction; 688 689 cmd = scb->io_ctx; 690 direction = scsi_to_pci_dma_dir(cmd->sc_data_direction); 691 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE); 692 if (cmd->use_sg != 0) { 693 struct scatterlist *sg; 694 695 sg = (struct scatterlist *)cmd->request_buffer; 696 pci_unmap_sg(ahd->dev_softc, sg, cmd->use_sg, direction); 697 } else if (cmd->request_bufflen != 0) { 698 pci_unmap_single(ahd->dev_softc, 699 scb->platform_data->buf_busaddr, 700 cmd->request_bufflen, direction); 701 } 702 } 703 704 /******************************** Macros **************************************/ 705 #define BUILD_SCSIID(ahd, cmd) \ 706 ((((cmd)->device->id << TID_SHIFT) & TID) | (ahd)->our_id) 707 708 /************************ Host template entry points *************************/ 709 static int ahd_linux_detect(Scsi_Host_Template *); 710 static const char *ahd_linux_info(struct Scsi_Host *); 711 static int ahd_linux_queue(Scsi_Cmnd *, void (*)(Scsi_Cmnd *)); 712 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) 713 static int ahd_linux_slave_alloc(Scsi_Device *); 714 static int ahd_linux_slave_configure(Scsi_Device *); 715 static void ahd_linux_slave_destroy(Scsi_Device *); 716 #if defined(__i386__) 717 static int ahd_linux_biosparam(struct scsi_device*, 718 struct block_device*, sector_t, int[]); 719 #endif 720 #else 721 static int ahd_linux_release(struct Scsi_Host *); 722 static void ahd_linux_select_queue_depth(struct Scsi_Host *host, 723 Scsi_Device *scsi_devs); 724 #if defined(__i386__) 725 static int ahd_linux_biosparam(Disk *, kdev_t, int[]); 726 #endif 727 #endif 728 static int ahd_linux_bus_reset(Scsi_Cmnd *); 729 static int ahd_linux_dev_reset(Scsi_Cmnd *); 730 static int ahd_linux_abort(Scsi_Cmnd *); 731 732 /* 733 * Calculate a safe value for AHD_NSEG (as expressed through ahd_linux_nseg). 734 * 735 * In pre-2.5.X... 736 * The midlayer allocates an S/G array dynamically when a command is issued 737 * using SCSI malloc. This array, which is in an OS dependent format that 738 * must later be copied to our private S/G list, is sized to house just the 739 * number of segments needed for the current transfer. Since the code that 740 * sizes the SCSI malloc pool does not take into consideration fragmentation 741 * of the pool, executing transactions numbering just a fraction of our 742 * concurrent transaction limit with SG list lengths aproaching AHC_NSEG will 743 * quickly depleat the SCSI malloc pool of usable space. Unfortunately, the 744 * mid-layer does not properly handle this scsi malloc failures for the S/G 745 * array and the result can be a lockup of the I/O subsystem. We try to size 746 * our S/G list so that it satisfies our drivers allocation requirements in 747 * addition to avoiding fragmentation of the SCSI malloc pool. 748 */ 749 static void 750 ahd_linux_size_nseg(void) 751 { 752 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) 753 u_int cur_size; 754 u_int best_size; 755 756 /* 757 * The SCSI allocator rounds to the nearest 512 bytes 758 * an cannot allocate across a page boundary. Our algorithm 759 * is to start at 1K of scsi malloc space per-command and 760 * loop through all factors of the PAGE_SIZE and pick the best. 761 */ 762 best_size = 0; 763 for (cur_size = 1024; cur_size <= PAGE_SIZE; cur_size *= 2) { 764 u_int nseg; 765 766 nseg = cur_size / sizeof(struct scatterlist); 767 if (nseg < AHD_LINUX_MIN_NSEG) 768 continue; 769 770 if (best_size == 0) { 771 best_size = cur_size; 772 ahd_linux_nseg = nseg; 773 } else { 774 u_int best_rem; 775 u_int cur_rem; 776 777 /* 778 * Compare the traits of the current "best_size" 779 * with the current size to determine if the 780 * current size is a better size. 781 */ 782 best_rem = best_size % sizeof(struct scatterlist); 783 cur_rem = cur_size % sizeof(struct scatterlist); 784 if (cur_rem < best_rem) { 785 best_size = cur_size; 786 ahd_linux_nseg = nseg; 787 } 788 } 789 } 790 #endif 791 } 792 793 /* 794 * Try to detect an Adaptec 79XX controller. 795 */ 796 static int 797 ahd_linux_detect(Scsi_Host_Template *template) 798 { 799 struct ahd_softc *ahd; 800 int found; 801 int error = 0; 802 803 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) 804 /* 805 * It is a bug that the upper layer takes 806 * this lock just prior to calling us. 807 */ 808 spin_unlock_irq(&io_request_lock); 809 #endif 810 811 /* 812 * Sanity checking of Linux SCSI data structures so 813 * that some of our hacks^H^H^H^H^Hassumptions aren't 814 * violated. 815 */ 816 if (offsetof(struct ahd_cmd_internal, end) 817 > offsetof(struct scsi_cmnd, host_scribble)) { 818 printf("ahd_linux_detect: SCSI data structures changed.\n"); 819 printf("ahd_linux_detect: Unable to attach\n"); 820 return (0); 821 } 822 /* 823 * Determine an appropriate size for our Scatter Gatther lists. 824 */ 825 ahd_linux_size_nseg(); 826 #ifdef MODULE 827 /* 828 * If we've been passed any parameters, process them now. 829 */ 830 if (aic79xx) 831 aic79xx_setup(aic79xx); 832 #endif 833 834 template->proc_name = "aic79xx"; 835 836 /* 837 * Initialize our softc list lock prior to 838 * probing for any adapters. 839 */ 840 ahd_list_lockinit(); 841 842 #ifdef CONFIG_PCI 843 error = ahd_linux_pci_init(); 844 if (error) 845 return error; 846 #endif 847 848 /* 849 * Register with the SCSI layer all 850 * controllers we've found. 851 */ 852 found = 0; 853 TAILQ_FOREACH(ahd, &ahd_tailq, links) { 854 855 if (ahd_linux_register_host(ahd, template) == 0) 856 found++; 857 } 858 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) 859 spin_lock_irq(&io_request_lock); 860 #endif 861 aic79xx_detect_complete++; 862 return 0; 863 } 864 865 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) 866 /* 867 * Free the passed in Scsi_Host memory structures prior to unloading the 868 * module. 869 */ 870 static int 871 ahd_linux_release(struct Scsi_Host * host) 872 { 873 struct ahd_softc *ahd; 874 u_long l; 875 876 ahd_list_lock(&l); 877 if (host != NULL) { 878 879 /* 880 * We should be able to just perform 881 * the free directly, but check our 882 * list for extra sanity. 883 */ 884 ahd = ahd_find_softc(*(struct ahd_softc **)host->hostdata); 885 if (ahd != NULL) { 886 u_long s; 887 888 ahd_lock(ahd, &s); 889 ahd_intr_enable(ahd, FALSE); 890 ahd_unlock(ahd, &s); 891 ahd_free(ahd); 892 } 893 } 894 ahd_list_unlock(&l); 895 return (0); 896 } 897 #endif 898 899 /* 900 * Return a string describing the driver. 901 */ 902 static const char * 903 ahd_linux_info(struct Scsi_Host *host) 904 { 905 static char buffer[512]; 906 char ahd_info[256]; 907 char *bp; 908 struct ahd_softc *ahd; 909 910 bp = &buffer[0]; 911 ahd = *(struct ahd_softc **)host->hostdata; 912 memset(bp, 0, sizeof(buffer)); 913 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev "); 914 strcat(bp, AIC79XX_DRIVER_VERSION); 915 strcat(bp, "\n"); 916 strcat(bp, " <"); 917 strcat(bp, ahd->description); 918 strcat(bp, ">\n"); 919 strcat(bp, " "); 920 ahd_controller_info(ahd, ahd_info); 921 strcat(bp, ahd_info); 922 strcat(bp, "\n"); 923 924 return (bp); 925 } 926 927 /* 928 * Queue an SCB to the controller. 929 */ 930 static int 931 ahd_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *)) 932 { 933 struct ahd_softc *ahd; 934 struct ahd_linux_device *dev; 935 u_long flags; 936 937 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 938 939 /* 940 * Save the callback on completion function. 941 */ 942 cmd->scsi_done = scsi_done; 943 944 ahd_midlayer_entrypoint_lock(ahd, &flags); 945 946 /* 947 * Close the race of a command that was in the process of 948 * being queued to us just as our simq was frozen. Let 949 * DV commands through so long as we are only frozen to 950 * perform DV. 951 */ 952 if (ahd->platform_data->qfrozen != 0 953 && AHD_DV_CMD(cmd) == 0) { 954 955 ahd_cmd_set_transaction_status(cmd, CAM_REQUEUE_REQ); 956 ahd_linux_queue_cmd_complete(ahd, cmd); 957 ahd_schedule_completeq(ahd); 958 ahd_midlayer_entrypoint_unlock(ahd, &flags); 959 return (0); 960 } 961 dev = ahd_linux_get_device(ahd, cmd->device->channel, 962 cmd->device->id, cmd->device->lun, 963 /*alloc*/TRUE); 964 if (dev == NULL) { 965 ahd_cmd_set_transaction_status(cmd, CAM_RESRC_UNAVAIL); 966 ahd_linux_queue_cmd_complete(ahd, cmd); 967 ahd_schedule_completeq(ahd); 968 ahd_midlayer_entrypoint_unlock(ahd, &flags); 969 printf("%s: aic79xx_linux_queue - Unable to allocate device!\n", 970 ahd_name(ahd)); 971 return (0); 972 } 973 if (cmd->cmd_len > MAX_CDB_LEN) 974 return (-EINVAL); 975 cmd->result = CAM_REQ_INPROG << 16; 976 TAILQ_INSERT_TAIL(&dev->busyq, (struct ahd_cmd *)cmd, acmd_links.tqe); 977 if ((dev->flags & AHD_DEV_ON_RUN_LIST) == 0) { 978 TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq, dev, links); 979 dev->flags |= AHD_DEV_ON_RUN_LIST; 980 ahd_linux_run_device_queues(ahd); 981 } 982 ahd_midlayer_entrypoint_unlock(ahd, &flags); 983 return (0); 984 } 985 986 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) 987 static int 988 ahd_linux_slave_alloc(Scsi_Device *device) 989 { 990 struct ahd_softc *ahd; 991 992 ahd = *((struct ahd_softc **)device->host->hostdata); 993 if (bootverbose) 994 printf("%s: Slave Alloc %d\n", ahd_name(ahd), device->id); 995 return (0); 996 } 997 998 static int 999 ahd_linux_slave_configure(Scsi_Device *device) 1000 { 1001 struct ahd_softc *ahd; 1002 struct ahd_linux_device *dev; 1003 u_long flags; 1004 1005 ahd = *((struct ahd_softc **)device->host->hostdata); 1006 if (bootverbose) 1007 printf("%s: Slave Configure %d\n", ahd_name(ahd), device->id); 1008 ahd_midlayer_entrypoint_lock(ahd, &flags); 1009 /* 1010 * Since Linux has attached to the device, configure 1011 * it so we don't free and allocate the device 1012 * structure on every command. 1013 */ 1014 dev = ahd_linux_get_device(ahd, device->channel, 1015 device->id, device->lun, 1016 /*alloc*/TRUE); 1017 if (dev != NULL) { 1018 dev->flags &= ~AHD_DEV_UNCONFIGURED; 1019 dev->flags |= AHD_DEV_SLAVE_CONFIGURED; 1020 dev->scsi_device = device; 1021 ahd_linux_device_queue_depth(ahd, dev); 1022 } 1023 ahd_midlayer_entrypoint_unlock(ahd, &flags); 1024 return (0); 1025 } 1026 1027 static void 1028 ahd_linux_slave_destroy(Scsi_Device *device) 1029 { 1030 struct ahd_softc *ahd; 1031 struct ahd_linux_device *dev; 1032 u_long flags; 1033 1034 ahd = *((struct ahd_softc **)device->host->hostdata); 1035 if (bootverbose) 1036 printf("%s: Slave Destroy %d\n", ahd_name(ahd), device->id); 1037 ahd_midlayer_entrypoint_lock(ahd, &flags); 1038 dev = ahd_linux_get_device(ahd, device->channel, 1039 device->id, device->lun, 1040 /*alloc*/FALSE); 1041 1042 /* 1043 * Filter out "silly" deletions of real devices by only 1044 * deleting devices that have had slave_configure() 1045 * called on them. All other devices that have not 1046 * been configured will automatically be deleted by 1047 * the refcounting process. 1048 */ 1049 if (dev != NULL 1050 && (dev->flags & AHD_DEV_SLAVE_CONFIGURED) != 0) { 1051 dev->flags |= AHD_DEV_UNCONFIGURED; 1052 if (TAILQ_EMPTY(&dev->busyq) 1053 && dev->active == 0 1054 && (dev->flags & AHD_DEV_TIMER_ACTIVE) == 0) 1055 ahd_linux_free_device(ahd, dev); 1056 } 1057 ahd_midlayer_entrypoint_unlock(ahd, &flags); 1058 } 1059 #else 1060 /* 1061 * Sets the queue depth for each SCSI device hanging 1062 * off the input host adapter. 1063 */ 1064 static void 1065 ahd_linux_select_queue_depth(struct Scsi_Host * host, 1066 Scsi_Device * scsi_devs) 1067 { 1068 Scsi_Device *device; 1069 Scsi_Device *ldev; 1070 struct ahd_softc *ahd; 1071 u_long flags; 1072 1073 ahd = *((struct ahd_softc **)host->hostdata); 1074 ahd_lock(ahd, &flags); 1075 for (device = scsi_devs; device != NULL; device = device->next) { 1076 1077 /* 1078 * Watch out for duplicate devices. This works around 1079 * some quirks in how the SCSI scanning code does its 1080 * device management. 1081 */ 1082 for (ldev = scsi_devs; ldev != device; ldev = ldev->next) { 1083 if (ldev->host == device->host 1084 && ldev->channel == device->channel 1085 && ldev->id == device->id 1086 && ldev->lun == device->lun) 1087 break; 1088 } 1089 /* Skip duplicate. */ 1090 if (ldev != device) 1091 continue; 1092 1093 if (device->host == host) { 1094 struct ahd_linux_device *dev; 1095 1096 /* 1097 * Since Linux has attached to the device, configure 1098 * it so we don't free and allocate the device 1099 * structure on every command. 1100 */ 1101 dev = ahd_linux_get_device(ahd, device->channel, 1102 device->id, device->lun, 1103 /*alloc*/TRUE); 1104 if (dev != NULL) { 1105 dev->flags &= ~AHD_DEV_UNCONFIGURED; 1106 dev->scsi_device = device; 1107 ahd_linux_device_queue_depth(ahd, dev); 1108 device->queue_depth = dev->openings 1109 + dev->active; 1110 if ((dev->flags & (AHD_DEV_Q_BASIC 1111 | AHD_DEV_Q_TAGGED)) == 0) { 1112 /* 1113 * We allow the OS to queue 2 untagged 1114 * transactions to us at any time even 1115 * though we can only execute them 1116 * serially on the controller/device. 1117 * This should remove some latency. 1118 */ 1119 device->queue_depth = 2; 1120 } 1121 } 1122 } 1123 } 1124 ahd_unlock(ahd, &flags); 1125 } 1126 #endif 1127 1128 #if defined(__i386__) 1129 /* 1130 * Return the disk geometry for the given SCSI device. 1131 */ 1132 static int 1133 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) 1134 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 1135 sector_t capacity, int geom[]) 1136 { 1137 uint8_t *bh; 1138 #else 1139 ahd_linux_biosparam(Disk *disk, kdev_t dev, int geom[]) 1140 { 1141 struct scsi_device *sdev = disk->device; 1142 u_long capacity = disk->capacity; 1143 struct buffer_head *bh; 1144 #endif 1145 int heads; 1146 int sectors; 1147 int cylinders; 1148 int ret; 1149 int extended; 1150 struct ahd_softc *ahd; 1151 1152 ahd = *((struct ahd_softc **)sdev->host->hostdata); 1153 1154 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) 1155 bh = scsi_bios_ptable(bdev); 1156 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,17) 1157 bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, block_size(dev)); 1158 #else 1159 bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, 1024); 1160 #endif 1161 1162 if (bh) { 1163 ret = scsi_partsize(bh, capacity, 1164 &geom[2], &geom[0], &geom[1]); 1165 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) 1166 kfree(bh); 1167 #else 1168 brelse(bh); 1169 #endif 1170 if (ret != -1) 1171 return (ret); 1172 } 1173 heads = 64; 1174 sectors = 32; 1175 cylinders = aic_sector_div(capacity, heads, sectors); 1176 1177 if (aic79xx_extended != 0) 1178 extended = 1; 1179 else 1180 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0; 1181 if (extended && cylinders >= 1024) { 1182 heads = 255; 1183 sectors = 63; 1184 cylinders = aic_sector_div(capacity, heads, sectors); 1185 } 1186 geom[0] = heads; 1187 geom[1] = sectors; 1188 geom[2] = cylinders; 1189 return (0); 1190 } 1191 #endif 1192 1193 /* 1194 * Abort the current SCSI command(s). 1195 */ 1196 static int 1197 ahd_linux_abort(Scsi_Cmnd *cmd) 1198 { 1199 struct ahd_softc *ahd; 1200 struct ahd_cmd *acmd; 1201 struct ahd_cmd *list_acmd; 1202 struct ahd_linux_device *dev; 1203 struct scb *pending_scb; 1204 u_long s; 1205 u_int saved_scbptr; 1206 u_int active_scbptr; 1207 u_int last_phase; 1208 u_int cdb_byte; 1209 int retval; 1210 int was_paused; 1211 int paused; 1212 int wait; 1213 int disconnected; 1214 ahd_mode_state saved_modes; 1215 1216 pending_scb = NULL; 1217 paused = FALSE; 1218 wait = FALSE; 1219 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 1220 acmd = (struct ahd_cmd *)cmd; 1221 1222 printf("%s:%d:%d:%d: Attempting to abort cmd %p:", 1223 ahd_name(ahd), cmd->device->channel, cmd->device->id, 1224 cmd->device->lun, cmd); 1225 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 1226 printf(" 0x%x", cmd->cmnd[cdb_byte]); 1227 printf("\n"); 1228 1229 /* 1230 * In all versions of Linux, we have to work around 1231 * a major flaw in how the mid-layer is locked down 1232 * if we are to sleep successfully in our error handler 1233 * while allowing our interrupt handler to run. Since 1234 * the midlayer acquires either the io_request_lock or 1235 * our lock prior to calling us, we must use the 1236 * spin_unlock_irq() method for unlocking our lock. 1237 * This will force interrupts to be enabled on the 1238 * current CPU. Since the EH thread should not have 1239 * been running with CPU interrupts disabled other than 1240 * by acquiring either the io_request_lock or our own 1241 * lock, this *should* be safe. 1242 */ 1243 ahd_midlayer_entrypoint_lock(ahd, &s); 1244 1245 /* 1246 * First determine if we currently own this command. 1247 * Start by searching the device queue. If not found 1248 * there, check the pending_scb list. If not found 1249 * at all, and the system wanted us to just abort the 1250 * command, return success. 1251 */ 1252 dev = ahd_linux_get_device(ahd, cmd->device->channel, 1253 cmd->device->id, cmd->device->lun, 1254 /*alloc*/FALSE); 1255 1256 if (dev == NULL) { 1257 /* 1258 * No target device for this command exists, 1259 * so we must not still own the command. 1260 */ 1261 printf("%s:%d:%d:%d: Is not an active device\n", 1262 ahd_name(ahd), cmd->device->channel, cmd->device->id, 1263 cmd->device->lun); 1264 retval = SUCCESS; 1265 goto no_cmd; 1266 } 1267 1268 TAILQ_FOREACH(list_acmd, &dev->busyq, acmd_links.tqe) { 1269 if (list_acmd == acmd) 1270 break; 1271 } 1272 1273 if (list_acmd != NULL) { 1274 printf("%s:%d:%d:%d: Command found on device queue\n", 1275 ahd_name(ahd), cmd->device->channel, cmd->device->id, 1276 cmd->device->lun); 1277 TAILQ_REMOVE(&dev->busyq, list_acmd, acmd_links.tqe); 1278 cmd->result = DID_ABORT << 16; 1279 ahd_linux_queue_cmd_complete(ahd, cmd); 1280 retval = SUCCESS; 1281 goto done; 1282 } 1283 1284 /* 1285 * See if we can find a matching cmd in the pending list. 1286 */ 1287 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { 1288 if (pending_scb->io_ctx == cmd) 1289 break; 1290 } 1291 1292 if (pending_scb == NULL) { 1293 printf("%s:%d:%d:%d: Command not found\n", 1294 ahd_name(ahd), cmd->device->channel, cmd->device->id, 1295 cmd->device->lun); 1296 goto no_cmd; 1297 } 1298 1299 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 1300 /* 1301 * We can't queue two recovery actions using the same SCB 1302 */ 1303 retval = FAILED; 1304 goto done; 1305 } 1306 1307 /* 1308 * Ensure that the card doesn't do anything 1309 * behind our back. Also make sure that we 1310 * didn't "just" miss an interrupt that would 1311 * affect this cmd. 1312 */ 1313 was_paused = ahd_is_paused(ahd); 1314 ahd_pause_and_flushwork(ahd); 1315 paused = TRUE; 1316 1317 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 1318 printf("%s:%d:%d:%d: Command already completed\n", 1319 ahd_name(ahd), cmd->device->channel, cmd->device->id, 1320 cmd->device->lun); 1321 goto no_cmd; 1322 } 1323 1324 printf("%s: At time of recovery, card was %spaused\n", 1325 ahd_name(ahd), was_paused ? "" : "not "); 1326 ahd_dump_card_state(ahd); 1327 1328 disconnected = TRUE; 1329 if (ahd_search_qinfifo(ahd, cmd->device->id, cmd->device->channel + 'A', 1330 cmd->device->lun, SCB_GET_TAG(pending_scb), 1331 ROLE_INITIATOR, CAM_REQ_ABORTED, 1332 SEARCH_COMPLETE) > 0) { 1333 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 1334 ahd_name(ahd), cmd->device->channel, cmd->device->id, 1335 cmd->device->lun); 1336 retval = SUCCESS; 1337 goto done; 1338 } 1339 1340 saved_modes = ahd_save_modes(ahd); 1341 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); 1342 last_phase = ahd_inb(ahd, LASTPHASE); 1343 saved_scbptr = ahd_get_scbptr(ahd); 1344 active_scbptr = saved_scbptr; 1345 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 1346 struct scb *bus_scb; 1347 1348 bus_scb = ahd_lookup_scb(ahd, active_scbptr); 1349 if (bus_scb == pending_scb) 1350 disconnected = FALSE; 1351 } 1352 1353 /* 1354 * At this point, pending_scb is the scb associated with the 1355 * passed in command. That command is currently active on the 1356 * bus or is in the disconnected state. 1357 */ 1358 if (last_phase != P_BUSFREE 1359 && SCB_GET_TAG(pending_scb) == active_scbptr) { 1360 1361 /* 1362 * We're active on the bus, so assert ATN 1363 * and hope that the target responds. 1364 */ 1365 pending_scb = ahd_lookup_scb(ahd, active_scbptr); 1366 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 1367 ahd_outb(ahd, MSG_OUT, HOST_MSG); 1368 ahd_outb(ahd, SCSISIGO, last_phase|ATNO); 1369 printf("%s:%d:%d:%d: Device is active, asserting ATN\n", 1370 ahd_name(ahd), cmd->device->channel, 1371 cmd->device->id, cmd->device->lun); 1372 wait = TRUE; 1373 } else if (disconnected) { 1374 1375 /* 1376 * Actually re-queue this SCB in an attempt 1377 * to select the device before it reconnects. 1378 */ 1379 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 1380 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb)); 1381 pending_scb->hscb->cdb_len = 0; 1382 pending_scb->hscb->task_attribute = 0; 1383 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK; 1384 1385 if ((pending_scb->flags & SCB_PACKETIZED) != 0) { 1386 /* 1387 * Mark the SCB has having an outstanding 1388 * task management function. Should the command 1389 * complete normally before the task management 1390 * function can be sent, the host will be notified 1391 * to abort our requeued SCB. 1392 */ 1393 ahd_outb(ahd, SCB_TASK_MANAGEMENT, 1394 pending_scb->hscb->task_management); 1395 } else { 1396 /* 1397 * If non-packetized, set the MK_MESSAGE control 1398 * bit indicating that we desire to send a message. 1399 * We also set the disconnected flag since there is 1400 * no guarantee that our SCB control byte matches 1401 * the version on the card. We don't want the 1402 * sequencer to abort the command thinking an 1403 * unsolicited reselection occurred. 1404 */ 1405 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 1406 1407 /* 1408 * The sequencer will never re-reference the 1409 * in-core SCB. To make sure we are notified 1410 * during reslection, set the MK_MESSAGE flag in 1411 * the card's copy of the SCB. 1412 */ 1413 ahd_outb(ahd, SCB_CONTROL, 1414 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE); 1415 } 1416 1417 /* 1418 * Clear out any entries in the QINFIFO first 1419 * so we are the next SCB for this target 1420 * to run. 1421 */ 1422 ahd_search_qinfifo(ahd, cmd->device->id, 1423 cmd->device->channel + 'A', cmd->device->lun, 1424 SCB_LIST_NULL, ROLE_INITIATOR, 1425 CAM_REQUEUE_REQ, SEARCH_COMPLETE); 1426 ahd_qinfifo_requeue_tail(ahd, pending_scb); 1427 ahd_set_scbptr(ahd, saved_scbptr); 1428 ahd_print_path(ahd, pending_scb); 1429 printf("Device is disconnected, re-queuing SCB\n"); 1430 wait = TRUE; 1431 } else { 1432 printf("%s:%d:%d:%d: Unable to deliver message\n", 1433 ahd_name(ahd), cmd->device->channel, 1434 cmd->device->id, cmd->device->lun); 1435 retval = FAILED; 1436 goto done; 1437 } 1438 1439 no_cmd: 1440 /* 1441 * Our assumption is that if we don't have the command, no 1442 * recovery action was required, so we return success. Again, 1443 * the semantics of the mid-layer recovery engine are not 1444 * well defined, so this may change in time. 1445 */ 1446 retval = SUCCESS; 1447 done: 1448 if (paused) 1449 ahd_unpause(ahd); 1450 if (wait) { 1451 struct timer_list timer; 1452 int ret; 1453 1454 pending_scb->platform_data->flags |= AHD_SCB_UP_EH_SEM; 1455 spin_unlock_irq(&ahd->platform_data->spin_lock); 1456 init_timer(&timer); 1457 timer.data = (u_long)pending_scb; 1458 timer.expires = jiffies + (5 * HZ); 1459 timer.function = ahd_linux_sem_timeout; 1460 add_timer(&timer); 1461 printf("Recovery code sleeping\n"); 1462 down(&ahd->platform_data->eh_sem); 1463 printf("Recovery code awake\n"); 1464 ret = del_timer_sync(&timer); 1465 if (ret == 0) { 1466 printf("Timer Expired\n"); 1467 retval = FAILED; 1468 } 1469 spin_lock_irq(&ahd->platform_data->spin_lock); 1470 } 1471 ahd_schedule_runq(ahd); 1472 ahd_linux_run_complete_queue(ahd); 1473 ahd_midlayer_entrypoint_unlock(ahd, &s); 1474 return (retval); 1475 } 1476 1477 1478 static void 1479 ahd_linux_dev_reset_complete(Scsi_Cmnd *cmd) 1480 { 1481 free(cmd, M_DEVBUF); 1482 } 1483 1484 /* 1485 * Attempt to send a target reset message to the device that timed out. 1486 */ 1487 static int 1488 ahd_linux_dev_reset(Scsi_Cmnd *cmd) 1489 { 1490 struct ahd_softc *ahd; 1491 struct scsi_cmnd *recovery_cmd; 1492 struct ahd_linux_device *dev; 1493 struct ahd_initiator_tinfo *tinfo; 1494 struct ahd_tmode_tstate *tstate; 1495 struct scb *scb; 1496 struct hardware_scb *hscb; 1497 u_long s; 1498 struct timer_list timer; 1499 int retval; 1500 1501 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 1502 recovery_cmd = malloc(sizeof(struct scsi_cmnd), M_DEVBUF, M_WAITOK); 1503 if (!recovery_cmd) 1504 return (FAILED); 1505 memset(recovery_cmd, 0, sizeof(struct scsi_cmnd)); 1506 recovery_cmd->device = cmd->device; 1507 recovery_cmd->scsi_done = ahd_linux_dev_reset_complete; 1508 #if AHD_DEBUG 1509 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) 1510 printf("%s:%d:%d:%d: Device reset called for cmd %p\n", 1511 ahd_name(ahd), cmd->device->channel, cmd->device->id, 1512 cmd->device->lun, cmd); 1513 #endif 1514 ahd_midlayer_entrypoint_lock(ahd, &s); 1515 1516 dev = ahd_linux_get_device(ahd, cmd->device->channel, cmd->device->id, 1517 cmd->device->lun, /*alloc*/FALSE); 1518 if (dev == NULL) { 1519 ahd_midlayer_entrypoint_unlock(ahd, &s); 1520 kfree(recovery_cmd); 1521 return (FAILED); 1522 } 1523 if ((scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX)) == NULL) { 1524 ahd_midlayer_entrypoint_unlock(ahd, &s); 1525 kfree(recovery_cmd); 1526 return (FAILED); 1527 } 1528 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1529 cmd->device->id, &tstate); 1530 recovery_cmd->result = CAM_REQ_INPROG << 16; 1531 recovery_cmd->host_scribble = (char *)scb; 1532 scb->io_ctx = recovery_cmd; 1533 scb->platform_data->dev = dev; 1534 scb->sg_count = 0; 1535 ahd_set_residual(scb, 0); 1536 ahd_set_sense_residual(scb, 0); 1537 hscb = scb->hscb; 1538 hscb->control = 0; 1539 hscb->scsiid = BUILD_SCSIID(ahd, cmd); 1540 hscb->lun = cmd->device->lun; 1541 hscb->cdb_len = 0; 1542 hscb->task_management = SIU_TASKMGMT_LUN_RESET; 1543 scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE; 1544 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 1545 scb->flags |= SCB_PACKETIZED; 1546 } else { 1547 hscb->control |= MK_MESSAGE; 1548 } 1549 dev->openings--; 1550 dev->active++; 1551 dev->commands_issued++; 1552 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); 1553 ahd_queue_scb(ahd, scb); 1554 1555 scb->platform_data->flags |= AHD_SCB_UP_EH_SEM; 1556 spin_unlock_irq(&ahd->platform_data->spin_lock); 1557 init_timer(&timer); 1558 timer.data = (u_long)scb; 1559 timer.expires = jiffies + (5 * HZ); 1560 timer.function = ahd_linux_sem_timeout; 1561 add_timer(&timer); 1562 printf("Recovery code sleeping\n"); 1563 down(&ahd->platform_data->eh_sem); 1564 printf("Recovery code awake\n"); 1565 retval = SUCCESS; 1566 if (del_timer_sync(&timer) == 0) { 1567 printf("Timer Expired\n"); 1568 retval = FAILED; 1569 } 1570 spin_lock_irq(&ahd->platform_data->spin_lock); 1571 ahd_schedule_runq(ahd); 1572 ahd_linux_run_complete_queue(ahd); 1573 ahd_midlayer_entrypoint_unlock(ahd, &s); 1574 printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval); 1575 return (retval); 1576 } 1577 1578 /* 1579 * Reset the SCSI bus. 1580 */ 1581 static int 1582 ahd_linux_bus_reset(Scsi_Cmnd *cmd) 1583 { 1584 struct ahd_softc *ahd; 1585 u_long s; 1586 int found; 1587 1588 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 1589 #ifdef AHD_DEBUG 1590 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) 1591 printf("%s: Bus reset called for cmd %p\n", 1592 ahd_name(ahd), cmd); 1593 #endif 1594 ahd_midlayer_entrypoint_lock(ahd, &s); 1595 found = ahd_reset_channel(ahd, cmd->device->channel + 'A', 1596 /*initiate reset*/TRUE); 1597 ahd_linux_run_complete_queue(ahd); 1598 ahd_midlayer_entrypoint_unlock(ahd, &s); 1599 1600 if (bootverbose) 1601 printf("%s: SCSI bus reset delivered. " 1602 "%d SCBs aborted.\n", ahd_name(ahd), found); 1603 1604 return (SUCCESS); 1605 } 1606 1607 Scsi_Host_Template aic79xx_driver_template = { 1608 .module = THIS_MODULE, 1609 .name = "aic79xx", 1610 .proc_info = ahd_linux_proc_info, 1611 .info = ahd_linux_info, 1612 .queuecommand = ahd_linux_queue, 1613 .eh_abort_handler = ahd_linux_abort, 1614 .eh_device_reset_handler = ahd_linux_dev_reset, 1615 .eh_bus_reset_handler = ahd_linux_bus_reset, 1616 #if defined(__i386__) 1617 .bios_param = ahd_linux_biosparam, 1618 #endif 1619 .can_queue = AHD_MAX_QUEUE, 1620 .this_id = -1, 1621 .cmd_per_lun = 2, 1622 .use_clustering = ENABLE_CLUSTERING, 1623 .slave_alloc = ahd_linux_slave_alloc, 1624 .slave_configure = ahd_linux_slave_configure, 1625 .slave_destroy = ahd_linux_slave_destroy, 1626 }; 1627 1628 /**************************** Tasklet Handler *********************************/ 1629 1630 /* 1631 * In 2.4.X and above, this routine is called from a tasklet, 1632 * so we must re-acquire our lock prior to executing this code. 1633 * In all prior kernels, ahd_schedule_runq() calls this routine 1634 * directly and ahd_schedule_runq() is called with our lock held. 1635 */ 1636 static void 1637 ahd_runq_tasklet(unsigned long data) 1638 { 1639 struct ahd_softc* ahd; 1640 struct ahd_linux_device *dev; 1641 u_long flags; 1642 1643 ahd = (struct ahd_softc *)data; 1644 ahd_lock(ahd, &flags); 1645 while ((dev = ahd_linux_next_device_to_run(ahd)) != NULL) { 1646 1647 TAILQ_REMOVE(&ahd->platform_data->device_runq, dev, links); 1648 dev->flags &= ~AHD_DEV_ON_RUN_LIST; 1649 ahd_linux_check_device_queue(ahd, dev); 1650 /* Yeild to our interrupt handler */ 1651 ahd_unlock(ahd, &flags); 1652 ahd_lock(ahd, &flags); 1653 } 1654 ahd_unlock(ahd, &flags); 1655 } 1656 1657 /******************************** Bus DMA *************************************/ 1658 int 1659 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent, 1660 bus_size_t alignment, bus_size_t boundary, 1661 dma_addr_t lowaddr, dma_addr_t highaddr, 1662 bus_dma_filter_t *filter, void *filterarg, 1663 bus_size_t maxsize, int nsegments, 1664 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 1665 { 1666 bus_dma_tag_t dmat; 1667 1668 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT); 1669 if (dmat == NULL) 1670 return (ENOMEM); 1671 1672 /* 1673 * Linux is very simplistic about DMA memory. For now don't 1674 * maintain all specification information. Once Linux supplies 1675 * better facilities for doing these operations, or the 1676 * needs of this particular driver change, we might need to do 1677 * more here. 1678 */ 1679 dmat->alignment = alignment; 1680 dmat->boundary = boundary; 1681 dmat->maxsize = maxsize; 1682 *ret_tag = dmat; 1683 return (0); 1684 } 1685 1686 void 1687 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat) 1688 { 1689 free(dmat, M_DEVBUF); 1690 } 1691 1692 int 1693 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr, 1694 int flags, bus_dmamap_t *mapp) 1695 { 1696 bus_dmamap_t map; 1697 1698 map = malloc(sizeof(*map), M_DEVBUF, M_NOWAIT); 1699 if (map == NULL) 1700 return (ENOMEM); 1701 /* 1702 * Although we can dma data above 4GB, our 1703 * "consistent" memory is below 4GB for 1704 * space efficiency reasons (only need a 4byte 1705 * address). For this reason, we have to reset 1706 * our dma mask when doing allocations. 1707 */ 1708 if (ahd->dev_softc != NULL) 1709 if (pci_set_dma_mask(ahd->dev_softc, 0xFFFFFFFF)) { 1710 printk(KERN_WARNING "aic79xx: No suitable DMA available.\n"); 1711 kfree(map); 1712 return (ENODEV); 1713 } 1714 *vaddr = pci_alloc_consistent(ahd->dev_softc, 1715 dmat->maxsize, &map->bus_addr); 1716 if (ahd->dev_softc != NULL) 1717 if (pci_set_dma_mask(ahd->dev_softc, 1718 ahd->platform_data->hw_dma_mask)) { 1719 printk(KERN_WARNING "aic79xx: No suitable DMA available.\n"); 1720 kfree(map); 1721 return (ENODEV); 1722 } 1723 if (*vaddr == NULL) 1724 return (ENOMEM); 1725 *mapp = map; 1726 return(0); 1727 } 1728 1729 void 1730 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat, 1731 void* vaddr, bus_dmamap_t map) 1732 { 1733 pci_free_consistent(ahd->dev_softc, dmat->maxsize, 1734 vaddr, map->bus_addr); 1735 } 1736 1737 int 1738 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map, 1739 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 1740 void *cb_arg, int flags) 1741 { 1742 /* 1743 * Assume for now that this will only be used during 1744 * initialization and not for per-transaction buffer mapping. 1745 */ 1746 bus_dma_segment_t stack_sg; 1747 1748 stack_sg.ds_addr = map->bus_addr; 1749 stack_sg.ds_len = dmat->maxsize; 1750 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 1751 return (0); 1752 } 1753 1754 void 1755 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 1756 { 1757 /* 1758 * The map may is NULL in our < 2.3.X implementation. 1759 */ 1760 if (map != NULL) 1761 free(map, M_DEVBUF); 1762 } 1763 1764 int 1765 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 1766 { 1767 /* Nothing to do */ 1768 return (0); 1769 } 1770 1771 /********************* Platform Dependent Functions ***************************/ 1772 /* 1773 * Compare "left hand" softc with "right hand" softc, returning: 1774 * < 0 - lahd has a lower priority than rahd 1775 * 0 - Softcs are equal 1776 * > 0 - lahd has a higher priority than rahd 1777 */ 1778 int 1779 ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd) 1780 { 1781 int value; 1782 1783 /* 1784 * Under Linux, cards are ordered as follows: 1785 * 1) PCI devices that are marked as the boot controller. 1786 * 2) PCI devices with BIOS enabled sorted by bus/slot/func. 1787 * 3) All remaining PCI devices sorted by bus/slot/func. 1788 */ 1789 #if 0 1790 value = (lahd->flags & AHD_BOOT_CHANNEL) 1791 - (rahd->flags & AHD_BOOT_CHANNEL); 1792 if (value != 0) 1793 /* Controllers set for boot have a *higher* priority */ 1794 return (value); 1795 #endif 1796 1797 value = (lahd->flags & AHD_BIOS_ENABLED) 1798 - (rahd->flags & AHD_BIOS_ENABLED); 1799 if (value != 0) 1800 /* Controllers with BIOS enabled have a *higher* priority */ 1801 return (value); 1802 1803 /* Still equal. Sort by bus/slot/func. */ 1804 if (aic79xx_reverse_scan != 0) 1805 value = ahd_get_pci_bus(lahd->dev_softc) 1806 - ahd_get_pci_bus(rahd->dev_softc); 1807 else 1808 value = ahd_get_pci_bus(rahd->dev_softc) 1809 - ahd_get_pci_bus(lahd->dev_softc); 1810 if (value != 0) 1811 return (value); 1812 if (aic79xx_reverse_scan != 0) 1813 value = ahd_get_pci_slot(lahd->dev_softc) 1814 - ahd_get_pci_slot(rahd->dev_softc); 1815 else 1816 value = ahd_get_pci_slot(rahd->dev_softc) 1817 - ahd_get_pci_slot(lahd->dev_softc); 1818 if (value != 0) 1819 return (value); 1820 1821 value = rahd->channel - lahd->channel; 1822 return (value); 1823 } 1824 1825 static void 1826 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 1827 { 1828 1829 if ((instance >= 0) && (targ >= 0) 1830 && (instance < NUM_ELEMENTS(aic79xx_tag_info)) 1831 && (targ < AHD_NUM_TARGETS)) { 1832 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF; 1833 if (bootverbose) 1834 printf("tag_info[%d:%d] = %d\n", instance, targ, value); 1835 } 1836 } 1837 1838 static void 1839 ahd_linux_setup_rd_strm_info(u_long arg, int instance, int targ, int32_t value) 1840 { 1841 if ((instance >= 0) 1842 && (instance < NUM_ELEMENTS(aic79xx_rd_strm_info))) { 1843 aic79xx_rd_strm_info[instance] = value & 0xFFFF; 1844 if (bootverbose) 1845 printf("rd_strm[%d] = 0x%x\n", instance, value); 1846 } 1847 } 1848 1849 static void 1850 ahd_linux_setup_dv(u_long arg, int instance, int targ, int32_t value) 1851 { 1852 if ((instance >= 0) 1853 && (instance < NUM_ELEMENTS(aic79xx_dv_settings))) { 1854 aic79xx_dv_settings[instance] = value; 1855 if (bootverbose) 1856 printf("dv[%d] = %d\n", instance, value); 1857 } 1858 } 1859 1860 static void 1861 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value) 1862 { 1863 1864 if ((instance >= 0) 1865 && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) { 1866 uint8_t *iocell_info; 1867 1868 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance]; 1869 iocell_info[index] = value & 0xFFFF; 1870 if (bootverbose) 1871 printf("iocell[%d:%ld] = %d\n", instance, index, value); 1872 } 1873 } 1874 1875 static void 1876 ahd_linux_setup_tag_info_global(char *p) 1877 { 1878 int tags, i, j; 1879 1880 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 1881 printf("Setting Global Tags= %d\n", tags); 1882 1883 for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) { 1884 for (j = 0; j < AHD_NUM_TARGETS; j++) { 1885 aic79xx_tag_info[i].tag_commands[j] = tags; 1886 } 1887 } 1888 } 1889 1890 /* 1891 * Handle Linux boot parameters. This routine allows for assigning a value 1892 * to a parameter with a ':' between the parameter and the value. 1893 * ie. aic79xx=stpwlev:1,extended 1894 */ 1895 static int 1896 aic79xx_setup(char *s) 1897 { 1898 int i, n; 1899 char *p; 1900 char *end; 1901 1902 static struct { 1903 const char *name; 1904 uint32_t *flag; 1905 } options[] = { 1906 { "extended", &aic79xx_extended }, 1907 { "no_reset", &aic79xx_no_reset }, 1908 { "verbose", &aic79xx_verbose }, 1909 { "allow_memio", &aic79xx_allow_memio}, 1910 #ifdef AHD_DEBUG 1911 { "debug", &ahd_debug }, 1912 #endif 1913 { "reverse_scan", &aic79xx_reverse_scan }, 1914 { "periodic_otag", &aic79xx_periodic_otag }, 1915 { "pci_parity", &aic79xx_pci_parity }, 1916 { "seltime", &aic79xx_seltime }, 1917 { "tag_info", NULL }, 1918 { "global_tag_depth", NULL}, 1919 { "rd_strm", NULL }, 1920 { "dv", NULL }, 1921 { "slewrate", NULL }, 1922 { "precomp", NULL }, 1923 { "amplitude", NULL }, 1924 }; 1925 1926 end = strchr(s, '\0'); 1927 1928 /* 1929 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS 1930 * will never be 0 in this case. 1931 */ 1932 n = 0; 1933 1934 while ((p = strsep(&s, ",.")) != NULL) { 1935 if (*p == '\0') 1936 continue; 1937 for (i = 0; i < NUM_ELEMENTS(options); i++) { 1938 1939 n = strlen(options[i].name); 1940 if (strncmp(options[i].name, p, n) == 0) 1941 break; 1942 } 1943 if (i == NUM_ELEMENTS(options)) 1944 continue; 1945 1946 if (strncmp(p, "global_tag_depth", n) == 0) { 1947 ahd_linux_setup_tag_info_global(p + n); 1948 } else if (strncmp(p, "tag_info", n) == 0) { 1949 s = aic_parse_brace_option("tag_info", p + n, end, 1950 2, ahd_linux_setup_tag_info, 0); 1951 } else if (strncmp(p, "rd_strm", n) == 0) { 1952 s = aic_parse_brace_option("rd_strm", p + n, end, 1953 1, ahd_linux_setup_rd_strm_info, 0); 1954 } else if (strncmp(p, "dv", n) == 0) { 1955 s = aic_parse_brace_option("dv", p + n, end, 1, 1956 ahd_linux_setup_dv, 0); 1957 } else if (strncmp(p, "slewrate", n) == 0) { 1958 s = aic_parse_brace_option("slewrate", 1959 p + n, end, 1, ahd_linux_setup_iocell_info, 1960 AIC79XX_SLEWRATE_INDEX); 1961 } else if (strncmp(p, "precomp", n) == 0) { 1962 s = aic_parse_brace_option("precomp", 1963 p + n, end, 1, ahd_linux_setup_iocell_info, 1964 AIC79XX_PRECOMP_INDEX); 1965 } else if (strncmp(p, "amplitude", n) == 0) { 1966 s = aic_parse_brace_option("amplitude", 1967 p + n, end, 1, ahd_linux_setup_iocell_info, 1968 AIC79XX_AMPLITUDE_INDEX); 1969 } else if (p[n] == ':') { 1970 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1971 } else if (!strncmp(p, "verbose", n)) { 1972 *(options[i].flag) = 1; 1973 } else { 1974 *(options[i].flag) ^= 0xFFFFFFFF; 1975 } 1976 } 1977 return 1; 1978 } 1979 1980 __setup("aic79xx=", aic79xx_setup); 1981 1982 uint32_t aic79xx_verbose; 1983 1984 int 1985 ahd_linux_register_host(struct ahd_softc *ahd, Scsi_Host_Template *template) 1986 { 1987 char buf[80]; 1988 struct Scsi_Host *host; 1989 char *new_name; 1990 u_long s; 1991 u_long target; 1992 1993 template->name = ahd->description; 1994 host = scsi_host_alloc(template, sizeof(struct ahd_softc *)); 1995 if (host == NULL) 1996 return (ENOMEM); 1997 1998 *((struct ahd_softc **)host->hostdata) = ahd; 1999 ahd_lock(ahd, &s); 2000 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) 2001 scsi_assign_lock(host, &ahd->platform_data->spin_lock); 2002 #elif AHD_SCSI_HAS_HOST_LOCK != 0 2003 host->lock = &ahd->platform_data->spin_lock; 2004 #endif 2005 ahd->platform_data->host = host; 2006 host->can_queue = AHD_MAX_QUEUE; 2007 host->cmd_per_lun = 2; 2008 host->sg_tablesize = AHD_NSEG; 2009 host->this_id = ahd->our_id; 2010 host->irq = ahd->platform_data->irq; 2011 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8; 2012 host->max_lun = AHD_NUM_LUNS; 2013 host->max_channel = 0; 2014 host->sg_tablesize = AHD_NSEG; 2015 ahd_set_unit(ahd, ahd_linux_next_unit()); 2016 sprintf(buf, "scsi%d", host->host_no); 2017 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); 2018 if (new_name != NULL) { 2019 strcpy(new_name, buf); 2020 ahd_set_name(ahd, new_name); 2021 } 2022 host->unique_id = ahd->unit; 2023 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) 2024 scsi_set_pci_device(host, ahd->dev_softc); 2025 #endif 2026 ahd_linux_setup_user_rd_strm_settings(ahd); 2027 ahd_linux_initialize_scsi_bus(ahd); 2028 ahd_unlock(ahd, &s); 2029 ahd->platform_data->dv_pid = kernel_thread(ahd_linux_dv_thread, ahd, 0); 2030 ahd_lock(ahd, &s); 2031 if (ahd->platform_data->dv_pid < 0) { 2032 printf("%s: Failed to create DV thread, error= %d\n", 2033 ahd_name(ahd), ahd->platform_data->dv_pid); 2034 return (-ahd->platform_data->dv_pid); 2035 } 2036 /* 2037 * Initially allocate *all* of our linux target objects 2038 * so that the DV thread will scan them all in parallel 2039 * just after driver initialization. Any device that 2040 * does not exist will have its target object destroyed 2041 * by the selection timeout handler. In the case of a 2042 * device that appears after the initial DV scan, async 2043 * negotiation will occur for the first command, and DV 2044 * will comence should that first command be successful. 2045 */ 2046 for (target = 0; target < host->max_id; target++) { 2047 2048 /* 2049 * Skip our own ID. Some Compaq/HP storage devices 2050 * have enclosure management devices that respond to 2051 * single bit selection (i.e. selecting ourselves). 2052 * It is expected that either an external application 2053 * or a modified kernel will be used to probe this 2054 * ID if it is appropriate. To accommodate these 2055 * installations, ahc_linux_alloc_target() will allocate 2056 * for our ID if asked to do so. 2057 */ 2058 if (target == ahd->our_id) 2059 continue; 2060 2061 ahd_linux_alloc_target(ahd, 0, target); 2062 } 2063 ahd_intr_enable(ahd, TRUE); 2064 ahd_linux_start_dv(ahd); 2065 ahd_unlock(ahd, &s); 2066 2067 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) 2068 scsi_add_host(host, &ahd->dev_softc->dev); /* XXX handle failure */ 2069 scsi_scan_host(host); 2070 #endif 2071 return (0); 2072 } 2073 2074 uint64_t 2075 ahd_linux_get_memsize(void) 2076 { 2077 struct sysinfo si; 2078 2079 si_meminfo(&si); 2080 return ((uint64_t)si.totalram << PAGE_SHIFT); 2081 } 2082 2083 /* 2084 * Find the smallest available unit number to use 2085 * for a new device. We don't just use a static 2086 * count to handle the "repeated hot-(un)plug" 2087 * scenario. 2088 */ 2089 static int 2090 ahd_linux_next_unit(void) 2091 { 2092 struct ahd_softc *ahd; 2093 int unit; 2094 2095 unit = 0; 2096 retry: 2097 TAILQ_FOREACH(ahd, &ahd_tailq, links) { 2098 if (ahd->unit == unit) { 2099 unit++; 2100 goto retry; 2101 } 2102 } 2103 return (unit); 2104 } 2105 2106 /* 2107 * Place the SCSI bus into a known state by either resetting it, 2108 * or forcing transfer negotiations on the next command to any 2109 * target. 2110 */ 2111 static void 2112 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd) 2113 { 2114 u_int target_id; 2115 u_int numtarg; 2116 2117 target_id = 0; 2118 numtarg = 0; 2119 2120 if (aic79xx_no_reset != 0) 2121 ahd->flags &= ~AHD_RESET_BUS_A; 2122 2123 if ((ahd->flags & AHD_RESET_BUS_A) != 0) 2124 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE); 2125 else 2126 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8; 2127 2128 /* 2129 * Force negotiation to async for all targets that 2130 * will not see an initial bus reset. 2131 */ 2132 for (; target_id < numtarg; target_id++) { 2133 struct ahd_devinfo devinfo; 2134 struct ahd_initiator_tinfo *tinfo; 2135 struct ahd_tmode_tstate *tstate; 2136 2137 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 2138 target_id, &tstate); 2139 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, 2140 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); 2141 ahd_update_neg_request(ahd, &devinfo, tstate, 2142 tinfo, AHD_NEG_ALWAYS); 2143 } 2144 /* Give the bus some time to recover */ 2145 if ((ahd->flags & AHD_RESET_BUS_A) != 0) { 2146 ahd_freeze_simq(ahd); 2147 init_timer(&ahd->platform_data->reset_timer); 2148 ahd->platform_data->reset_timer.data = (u_long)ahd; 2149 ahd->platform_data->reset_timer.expires = 2150 jiffies + (AIC79XX_RESET_DELAY * HZ)/1000; 2151 ahd->platform_data->reset_timer.function = 2152 (ahd_linux_callback_t *)ahd_release_simq; 2153 add_timer(&ahd->platform_data->reset_timer); 2154 } 2155 } 2156 2157 int 2158 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg) 2159 { 2160 ahd->platform_data = 2161 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT); 2162 if (ahd->platform_data == NULL) 2163 return (ENOMEM); 2164 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data)); 2165 TAILQ_INIT(&ahd->platform_data->completeq); 2166 TAILQ_INIT(&ahd->platform_data->device_runq); 2167 ahd->platform_data->irq = AHD_LINUX_NOIRQ; 2168 ahd->platform_data->hw_dma_mask = 0xFFFFFFFF; 2169 ahd_lockinit(ahd); 2170 ahd_done_lockinit(ahd); 2171 init_timer(&ahd->platform_data->completeq_timer); 2172 ahd->platform_data->completeq_timer.data = (u_long)ahd; 2173 ahd->platform_data->completeq_timer.function = 2174 (ahd_linux_callback_t *)ahd_linux_thread_run_complete_queue; 2175 init_MUTEX_LOCKED(&ahd->platform_data->eh_sem); 2176 init_MUTEX_LOCKED(&ahd->platform_data->dv_sem); 2177 init_MUTEX_LOCKED(&ahd->platform_data->dv_cmd_sem); 2178 ahd_setup_runq_tasklet(ahd); 2179 ahd->seltime = (aic79xx_seltime & 0x3) << 4; 2180 return (0); 2181 } 2182 2183 void 2184 ahd_platform_free(struct ahd_softc *ahd) 2185 { 2186 struct ahd_linux_target *targ; 2187 struct ahd_linux_device *dev; 2188 int i, j; 2189 2190 if (ahd->platform_data != NULL) { 2191 del_timer_sync(&ahd->platform_data->completeq_timer); 2192 ahd_linux_kill_dv_thread(ahd); 2193 ahd_teardown_runq_tasklet(ahd); 2194 if (ahd->platform_data->host != NULL) { 2195 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) 2196 scsi_remove_host(ahd->platform_data->host); 2197 #endif 2198 scsi_host_put(ahd->platform_data->host); 2199 } 2200 2201 /* destroy all of the device and target objects */ 2202 for (i = 0; i < AHD_NUM_TARGETS; i++) { 2203 targ = ahd->platform_data->targets[i]; 2204 if (targ != NULL) { 2205 /* Keep target around through the loop. */ 2206 targ->refcount++; 2207 for (j = 0; j < AHD_NUM_LUNS; j++) { 2208 2209 if (targ->devices[j] == NULL) 2210 continue; 2211 dev = targ->devices[j]; 2212 ahd_linux_free_device(ahd, dev); 2213 } 2214 /* 2215 * Forcibly free the target now that 2216 * all devices are gone. 2217 */ 2218 ahd_linux_free_target(ahd, targ); 2219 } 2220 } 2221 2222 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ) 2223 free_irq(ahd->platform_data->irq, ahd); 2224 if (ahd->tags[0] == BUS_SPACE_PIO 2225 && ahd->bshs[0].ioport != 0) 2226 release_region(ahd->bshs[0].ioport, 256); 2227 if (ahd->tags[1] == BUS_SPACE_PIO 2228 && ahd->bshs[1].ioport != 0) 2229 release_region(ahd->bshs[1].ioport, 256); 2230 if (ahd->tags[0] == BUS_SPACE_MEMIO 2231 && ahd->bshs[0].maddr != NULL) { 2232 iounmap(ahd->bshs[0].maddr); 2233 release_mem_region(ahd->platform_data->mem_busaddr, 2234 0x1000); 2235 } 2236 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) 2237 /* 2238 * In 2.4 we detach from the scsi midlayer before the PCI 2239 * layer invokes our remove callback. No per-instance 2240 * detach is provided, so we must reach inside the PCI 2241 * subsystem's internals and detach our driver manually. 2242 */ 2243 if (ahd->dev_softc != NULL) 2244 ahd->dev_softc->driver = NULL; 2245 #endif 2246 free(ahd->platform_data, M_DEVBUF); 2247 } 2248 } 2249 2250 void 2251 ahd_platform_init(struct ahd_softc *ahd) 2252 { 2253 /* 2254 * Lookup and commit any modified IO Cell options. 2255 */ 2256 if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) { 2257 struct ahd_linux_iocell_opts *iocell_opts; 2258 2259 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 2260 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP) 2261 AHD_SET_PRECOMP(ahd, iocell_opts->precomp); 2262 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE) 2263 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate); 2264 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE) 2265 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude); 2266 } 2267 2268 } 2269 2270 void 2271 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb) 2272 { 2273 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), 2274 SCB_GET_CHANNEL(ahd, scb), 2275 SCB_GET_LUN(scb), SCB_LIST_NULL, 2276 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 2277 } 2278 2279 void 2280 ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo, 2281 ahd_queue_alg alg) 2282 { 2283 struct ahd_linux_device *dev; 2284 int was_queuing; 2285 int now_queuing; 2286 2287 dev = ahd_linux_get_device(ahd, devinfo->channel - 'A', 2288 devinfo->target, 2289 devinfo->lun, /*alloc*/FALSE); 2290 if (dev == NULL) 2291 return; 2292 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED); 2293 switch (alg) { 2294 default: 2295 case AHD_QUEUE_NONE: 2296 now_queuing = 0; 2297 break; 2298 case AHD_QUEUE_BASIC: 2299 now_queuing = AHD_DEV_Q_BASIC; 2300 break; 2301 case AHD_QUEUE_TAGGED: 2302 now_queuing = AHD_DEV_Q_TAGGED; 2303 break; 2304 } 2305 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0 2306 && (was_queuing != now_queuing) 2307 && (dev->active != 0)) { 2308 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY; 2309 dev->qfrozen++; 2310 } 2311 2312 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG); 2313 if (now_queuing) { 2314 u_int usertags; 2315 2316 usertags = ahd_linux_user_tagdepth(ahd, devinfo); 2317 if (!was_queuing) { 2318 /* 2319 * Start out agressively and allow our 2320 * dynamic queue depth algorithm to take 2321 * care of the rest. 2322 */ 2323 dev->maxtags = usertags; 2324 dev->openings = dev->maxtags - dev->active; 2325 } 2326 if (dev->maxtags == 0) { 2327 /* 2328 * Queueing is disabled by the user. 2329 */ 2330 dev->openings = 1; 2331 } else if (alg == AHD_QUEUE_TAGGED) { 2332 dev->flags |= AHD_DEV_Q_TAGGED; 2333 if (aic79xx_periodic_otag != 0) 2334 dev->flags |= AHD_DEV_PERIODIC_OTAG; 2335 } else 2336 dev->flags |= AHD_DEV_Q_BASIC; 2337 } else { 2338 /* We can only have one opening. */ 2339 dev->maxtags = 0; 2340 dev->openings = 1 - dev->active; 2341 } 2342 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) 2343 if (dev->scsi_device != NULL) { 2344 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) { 2345 case AHD_DEV_Q_BASIC: 2346 scsi_adjust_queue_depth(dev->scsi_device, 2347 MSG_SIMPLE_TASK, 2348 dev->openings + dev->active); 2349 break; 2350 case AHD_DEV_Q_TAGGED: 2351 scsi_adjust_queue_depth(dev->scsi_device, 2352 MSG_ORDERED_TASK, 2353 dev->openings + dev->active); 2354 break; 2355 default: 2356 /* 2357 * We allow the OS to queue 2 untagged transactions to 2358 * us at any time even though we can only execute them 2359 * serially on the controller/device. This should 2360 * remove some latency. 2361 */ 2362 scsi_adjust_queue_depth(dev->scsi_device, 2363 /*NON-TAGGED*/0, 2364 /*queue depth*/2); 2365 break; 2366 } 2367 } 2368 #endif 2369 } 2370 2371 int 2372 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel, 2373 int lun, u_int tag, role_t role, uint32_t status) 2374 { 2375 int targ; 2376 int maxtarg; 2377 int maxlun; 2378 int clun; 2379 int count; 2380 2381 if (tag != SCB_LIST_NULL) 2382 return (0); 2383 2384 targ = 0; 2385 if (target != CAM_TARGET_WILDCARD) { 2386 targ = target; 2387 maxtarg = targ + 1; 2388 } else { 2389 maxtarg = (ahd->features & AHD_WIDE) ? 16 : 8; 2390 } 2391 clun = 0; 2392 if (lun != CAM_LUN_WILDCARD) { 2393 clun = lun; 2394 maxlun = clun + 1; 2395 } else { 2396 maxlun = AHD_NUM_LUNS; 2397 } 2398 2399 count = 0; 2400 for (; targ < maxtarg; targ++) { 2401 2402 for (; clun < maxlun; clun++) { 2403 struct ahd_linux_device *dev; 2404 struct ahd_busyq *busyq; 2405 struct ahd_cmd *acmd; 2406 2407 dev = ahd_linux_get_device(ahd, /*chan*/0, targ, 2408 clun, /*alloc*/FALSE); 2409 if (dev == NULL) 2410 continue; 2411 2412 busyq = &dev->busyq; 2413 while ((acmd = TAILQ_FIRST(busyq)) != NULL) { 2414 Scsi_Cmnd *cmd; 2415 2416 cmd = &acmd_scsi_cmd(acmd); 2417 TAILQ_REMOVE(busyq, acmd, 2418 acmd_links.tqe); 2419 count++; 2420 cmd->result = status << 16; 2421 ahd_linux_queue_cmd_complete(ahd, cmd); 2422 } 2423 } 2424 } 2425 2426 return (count); 2427 } 2428 2429 static void 2430 ahd_linux_thread_run_complete_queue(struct ahd_softc *ahd) 2431 { 2432 u_long flags; 2433 2434 ahd_lock(ahd, &flags); 2435 del_timer(&ahd->platform_data->completeq_timer); 2436 ahd->platform_data->flags &= ~AHD_RUN_CMPLT_Q_TIMER; 2437 ahd_linux_run_complete_queue(ahd); 2438 ahd_unlock(ahd, &flags); 2439 } 2440 2441 static void 2442 ahd_linux_start_dv(struct ahd_softc *ahd) 2443 { 2444 2445 /* 2446 * Freeze the simq and signal ahd_linux_queue to not let any 2447 * more commands through 2448 */ 2449 if ((ahd->platform_data->flags & AHD_DV_ACTIVE) == 0) { 2450 #ifdef AHD_DEBUG 2451 if (ahd_debug & AHD_SHOW_DV) 2452 printf("%s: Starting DV\n", ahd_name(ahd)); 2453 #endif 2454 2455 ahd->platform_data->flags |= AHD_DV_ACTIVE; 2456 ahd_freeze_simq(ahd); 2457 2458 /* Wake up the DV kthread */ 2459 up(&ahd->platform_data->dv_sem); 2460 } 2461 } 2462 2463 static int 2464 ahd_linux_dv_thread(void *data) 2465 { 2466 struct ahd_softc *ahd; 2467 int target; 2468 u_long s; 2469 2470 ahd = (struct ahd_softc *)data; 2471 2472 #ifdef AHD_DEBUG 2473 if (ahd_debug & AHD_SHOW_DV) 2474 printf("In DV Thread\n"); 2475 #endif 2476 2477 /* 2478 * Complete thread creation. 2479 */ 2480 lock_kernel(); 2481 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,60) 2482 /* 2483 * Don't care about any signals. 2484 */ 2485 siginitsetinv(¤t->blocked, 0); 2486 2487 daemonize(); 2488 sprintf(current->comm, "ahd_dv_%d", ahd->unit); 2489 #else 2490 daemonize("ahd_dv_%d", ahd->unit); 2491 current->flags |= PF_FREEZE; 2492 #endif 2493 unlock_kernel(); 2494 2495 while (1) { 2496 /* 2497 * Use down_interruptible() rather than down() to 2498 * avoid inclusion in the load average. 2499 */ 2500 down_interruptible(&ahd->platform_data->dv_sem); 2501 2502 /* Check to see if we've been signaled to exit */ 2503 ahd_lock(ahd, &s); 2504 if ((ahd->platform_data->flags & AHD_DV_SHUTDOWN) != 0) { 2505 ahd_unlock(ahd, &s); 2506 break; 2507 } 2508 ahd_unlock(ahd, &s); 2509 2510 #ifdef AHD_DEBUG 2511 if (ahd_debug & AHD_SHOW_DV) 2512 printf("%s: Beginning Domain Validation\n", 2513 ahd_name(ahd)); 2514 #endif 2515 2516 /* 2517 * Wait for any pending commands to drain before proceeding. 2518 */ 2519 ahd_lock(ahd, &s); 2520 while (LIST_FIRST(&ahd->pending_scbs) != NULL) { 2521 ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_EMPTY; 2522 ahd_unlock(ahd, &s); 2523 down_interruptible(&ahd->platform_data->dv_sem); 2524 ahd_lock(ahd, &s); 2525 } 2526 2527 /* 2528 * Wait for the SIMQ to be released so that DV is the 2529 * only reason the queue is frozen. 2530 */ 2531 while (AHD_DV_SIMQ_FROZEN(ahd) == 0) { 2532 ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_RELEASE; 2533 ahd_unlock(ahd, &s); 2534 down_interruptible(&ahd->platform_data->dv_sem); 2535 ahd_lock(ahd, &s); 2536 } 2537 ahd_unlock(ahd, &s); 2538 2539 for (target = 0; target < AHD_NUM_TARGETS; target++) 2540 ahd_linux_dv_target(ahd, target); 2541 2542 ahd_lock(ahd, &s); 2543 ahd->platform_data->flags &= ~AHD_DV_ACTIVE; 2544 ahd_unlock(ahd, &s); 2545 2546 /* 2547 * Release the SIMQ so that normal commands are 2548 * allowed to continue on the bus. 2549 */ 2550 ahd_release_simq(ahd); 2551 } 2552 up(&ahd->platform_data->eh_sem); 2553 return (0); 2554 } 2555 2556 static void 2557 ahd_linux_kill_dv_thread(struct ahd_softc *ahd) 2558 { 2559 u_long s; 2560 2561 ahd_lock(ahd, &s); 2562 if (ahd->platform_data->dv_pid != 0) { 2563 ahd->platform_data->flags |= AHD_DV_SHUTDOWN; 2564 ahd_unlock(ahd, &s); 2565 up(&ahd->platform_data->dv_sem); 2566 2567 /* 2568 * Use the eh_sem as an indicator that the 2569 * dv thread is exiting. Note that the dv 2570 * thread must still return after performing 2571 * the up on our semaphore before it has 2572 * completely exited this module. Unfortunately, 2573 * there seems to be no easy way to wait for the 2574 * exit of a thread for which you are not the 2575 * parent (dv threads are parented by init). 2576 * Cross your fingers... 2577 */ 2578 down(&ahd->platform_data->eh_sem); 2579 2580 /* 2581 * Mark the dv thread as already dead. This 2582 * avoids attempting to kill it a second time. 2583 * This is necessary because we must kill the 2584 * DV thread before calling ahd_free() in the 2585 * module shutdown case to avoid bogus locking 2586 * in the SCSI mid-layer, but we ahd_free() is 2587 * called without killing the DV thread in the 2588 * instance detach case, so ahd_platform_free() 2589 * calls us again to verify that the DV thread 2590 * is dead. 2591 */ 2592 ahd->platform_data->dv_pid = 0; 2593 } else { 2594 ahd_unlock(ahd, &s); 2595 } 2596 } 2597 2598 #define AHD_LINUX_DV_INQ_SHORT_LEN 36 2599 #define AHD_LINUX_DV_INQ_LEN 256 2600 #define AHD_LINUX_DV_TIMEOUT (HZ / 4) 2601 2602 #define AHD_SET_DV_STATE(ahd, targ, newstate) \ 2603 ahd_set_dv_state(ahd, targ, newstate, __LINE__) 2604 2605 static __inline void 2606 ahd_set_dv_state(struct ahd_softc *ahd, struct ahd_linux_target *targ, 2607 ahd_dv_state newstate, u_int line) 2608 { 2609 ahd_dv_state oldstate; 2610 2611 oldstate = targ->dv_state; 2612 #ifdef AHD_DEBUG 2613 if (ahd_debug & AHD_SHOW_DV) 2614 printf("%s:%d: Going from state %d to state %d\n", 2615 ahd_name(ahd), line, oldstate, newstate); 2616 #endif 2617 2618 if (oldstate == newstate) 2619 targ->dv_state_retry++; 2620 else 2621 targ->dv_state_retry = 0; 2622 targ->dv_state = newstate; 2623 } 2624 2625 static void 2626 ahd_linux_dv_target(struct ahd_softc *ahd, u_int target_offset) 2627 { 2628 struct ahd_devinfo devinfo; 2629 struct ahd_linux_target *targ; 2630 struct scsi_cmnd *cmd; 2631 struct scsi_device *scsi_dev; 2632 struct scsi_sense_data *sense; 2633 uint8_t *buffer; 2634 u_long s; 2635 u_int timeout; 2636 int echo_size; 2637 2638 sense = NULL; 2639 buffer = NULL; 2640 echo_size = 0; 2641 ahd_lock(ahd, &s); 2642 targ = ahd->platform_data->targets[target_offset]; 2643 if (targ == NULL || (targ->flags & AHD_DV_REQUIRED) == 0) { 2644 ahd_unlock(ahd, &s); 2645 return; 2646 } 2647 ahd_compile_devinfo(&devinfo, ahd->our_id, targ->target, /*lun*/0, 2648 targ->channel + 'A', ROLE_INITIATOR); 2649 #ifdef AHD_DEBUG 2650 if (ahd_debug & AHD_SHOW_DV) { 2651 ahd_print_devinfo(ahd, &devinfo); 2652 printf("Performing DV\n"); 2653 } 2654 #endif 2655 2656 ahd_unlock(ahd, &s); 2657 2658 cmd = malloc(sizeof(struct scsi_cmnd), M_DEVBUF, M_WAITOK); 2659 scsi_dev = malloc(sizeof(struct scsi_device), M_DEVBUF, M_WAITOK); 2660 scsi_dev->host = ahd->platform_data->host; 2661 scsi_dev->id = devinfo.target; 2662 scsi_dev->lun = devinfo.lun; 2663 scsi_dev->channel = devinfo.channel - 'A'; 2664 ahd->platform_data->dv_scsi_dev = scsi_dev; 2665 2666 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_INQ_SHORT_ASYNC); 2667 2668 while (targ->dv_state != AHD_DV_STATE_EXIT) { 2669 timeout = AHD_LINUX_DV_TIMEOUT; 2670 switch (targ->dv_state) { 2671 case AHD_DV_STATE_INQ_SHORT_ASYNC: 2672 case AHD_DV_STATE_INQ_ASYNC: 2673 case AHD_DV_STATE_INQ_ASYNC_VERIFY: 2674 /* 2675 * Set things to async narrow to reduce the 2676 * chance that the INQ will fail. 2677 */ 2678 ahd_lock(ahd, &s); 2679 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0, 2680 AHD_TRANS_GOAL, /*paused*/FALSE); 2681 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 2682 AHD_TRANS_GOAL, /*paused*/FALSE); 2683 ahd_unlock(ahd, &s); 2684 timeout = 10 * HZ; 2685 targ->flags &= ~AHD_INQ_VALID; 2686 /* FALLTHROUGH */ 2687 case AHD_DV_STATE_INQ_VERIFY: 2688 { 2689 u_int inq_len; 2690 2691 if (targ->dv_state == AHD_DV_STATE_INQ_SHORT_ASYNC) 2692 inq_len = AHD_LINUX_DV_INQ_SHORT_LEN; 2693 else 2694 inq_len = targ->inq_data->additional_length + 5; 2695 ahd_linux_dv_inq(ahd, cmd, &devinfo, targ, inq_len); 2696 break; 2697 } 2698 case AHD_DV_STATE_TUR: 2699 case AHD_DV_STATE_BUSY: 2700 timeout = 5 * HZ; 2701 ahd_linux_dv_tur(ahd, cmd, &devinfo); 2702 break; 2703 case AHD_DV_STATE_REBD: 2704 ahd_linux_dv_rebd(ahd, cmd, &devinfo, targ); 2705 break; 2706 case AHD_DV_STATE_WEB: 2707 ahd_linux_dv_web(ahd, cmd, &devinfo, targ); 2708 break; 2709 2710 case AHD_DV_STATE_REB: 2711 ahd_linux_dv_reb(ahd, cmd, &devinfo, targ); 2712 break; 2713 2714 case AHD_DV_STATE_SU: 2715 ahd_linux_dv_su(ahd, cmd, &devinfo, targ); 2716 timeout = 50 * HZ; 2717 break; 2718 2719 default: 2720 ahd_print_devinfo(ahd, &devinfo); 2721 printf("Unknown DV state %d\n", targ->dv_state); 2722 goto out; 2723 } 2724 2725 /* Queue the command and wait for it to complete */ 2726 /* Abuse eh_timeout in the scsi_cmnd struct for our purposes */ 2727 init_timer(&cmd->eh_timeout); 2728 #ifdef AHD_DEBUG 2729 if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) 2730 /* 2731 * All of the printfs during negotiation 2732 * really slow down the negotiation. 2733 * Add a bit of time just to be safe. 2734 */ 2735 timeout += HZ; 2736 #endif 2737 scsi_add_timer(cmd, timeout, ahd_linux_dv_timeout); 2738 /* 2739 * In 2.5.X, it is assumed that all calls from the 2740 * "midlayer" (which we are emulating) will have the 2741 * ahd host lock held. For other kernels, the 2742 * io_request_lock must be held. 2743 */ 2744 #if AHD_SCSI_HAS_HOST_LOCK != 0 2745 ahd_lock(ahd, &s); 2746 #else 2747 spin_lock_irqsave(&io_request_lock, s); 2748 #endif 2749 ahd_linux_queue(cmd, ahd_linux_dv_complete); 2750 #if AHD_SCSI_HAS_HOST_LOCK != 0 2751 ahd_unlock(ahd, &s); 2752 #else 2753 spin_unlock_irqrestore(&io_request_lock, s); 2754 #endif 2755 down_interruptible(&ahd->platform_data->dv_cmd_sem); 2756 /* 2757 * Wait for the SIMQ to be released so that DV is the 2758 * only reason the queue is frozen. 2759 */ 2760 ahd_lock(ahd, &s); 2761 while (AHD_DV_SIMQ_FROZEN(ahd) == 0) { 2762 ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_RELEASE; 2763 ahd_unlock(ahd, &s); 2764 down_interruptible(&ahd->platform_data->dv_sem); 2765 ahd_lock(ahd, &s); 2766 } 2767 ahd_unlock(ahd, &s); 2768 2769 ahd_linux_dv_transition(ahd, cmd, &devinfo, targ); 2770 } 2771 2772 out: 2773 if ((targ->flags & AHD_INQ_VALID) != 0 2774 && ahd_linux_get_device(ahd, devinfo.channel - 'A', 2775 devinfo.target, devinfo.lun, 2776 /*alloc*/FALSE) == NULL) { 2777 /* 2778 * The DV state machine failed to configure this device. 2779 * This is normal if DV is disabled. Since we have inquiry 2780 * data, filter it and use the "optimistic" negotiation 2781 * parameters found in the inquiry string. 2782 */ 2783 ahd_linux_filter_inquiry(ahd, &devinfo); 2784 if ((targ->flags & (AHD_BASIC_DV|AHD_ENHANCED_DV)) != 0) { 2785 ahd_print_devinfo(ahd, &devinfo); 2786 printf("DV failed to configure device. " 2787 "Please file a bug report against " 2788 "this driver.\n"); 2789 } 2790 } 2791 2792 if (cmd != NULL) 2793 free(cmd, M_DEVBUF); 2794 2795 if (ahd->platform_data->dv_scsi_dev != NULL) { 2796 free(ahd->platform_data->dv_scsi_dev, M_DEVBUF); 2797 ahd->platform_data->dv_scsi_dev = NULL; 2798 } 2799 2800 ahd_lock(ahd, &s); 2801 if (targ->dv_buffer != NULL) { 2802 free(targ->dv_buffer, M_DEVBUF); 2803 targ->dv_buffer = NULL; 2804 } 2805 if (targ->dv_buffer1 != NULL) { 2806 free(targ->dv_buffer1, M_DEVBUF); 2807 targ->dv_buffer1 = NULL; 2808 } 2809 targ->flags &= ~AHD_DV_REQUIRED; 2810 if (targ->refcount == 0) 2811 ahd_linux_free_target(ahd, targ); 2812 ahd_unlock(ahd, &s); 2813 } 2814 2815 static __inline int 2816 ahd_linux_dv_fallback(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) 2817 { 2818 u_long s; 2819 int retval; 2820 2821 ahd_lock(ahd, &s); 2822 retval = ahd_linux_fallback(ahd, devinfo); 2823 ahd_unlock(ahd, &s); 2824 2825 return (retval); 2826 } 2827 2828 static void 2829 ahd_linux_dv_transition(struct ahd_softc *ahd, struct scsi_cmnd *cmd, 2830 struct ahd_devinfo *devinfo, 2831 struct ahd_linux_target *targ) 2832 { 2833 u_int32_t status; 2834 2835 status = aic_error_action(cmd, targ->inq_data, 2836 ahd_cmd_get_transaction_status(cmd), 2837 ahd_cmd_get_scsi_status(cmd)); 2838 2839 2840 #ifdef AHD_DEBUG 2841 if (ahd_debug & AHD_SHOW_DV) { 2842 ahd_print_devinfo(ahd, devinfo); 2843 printf("Entering ahd_linux_dv_transition, state= %d, " 2844 "status= 0x%x, cmd->result= 0x%x\n", targ->dv_state, 2845 status, cmd->result); 2846 } 2847 #endif 2848 2849 switch (targ->dv_state) { 2850 case AHD_DV_STATE_INQ_SHORT_ASYNC: 2851 case AHD_DV_STATE_INQ_ASYNC: 2852 switch (status & SS_MASK) { 2853 case SS_NOP: 2854 { 2855 AHD_SET_DV_STATE(ahd, targ, targ->dv_state+1); 2856 break; 2857 } 2858 case SS_INQ_REFRESH: 2859 AHD_SET_DV_STATE(ahd, targ, 2860 AHD_DV_STATE_INQ_SHORT_ASYNC); 2861 break; 2862 case SS_TUR: 2863 case SS_RETRY: 2864 AHD_SET_DV_STATE(ahd, targ, targ->dv_state); 2865 if (ahd_cmd_get_transaction_status(cmd) 2866 == CAM_REQUEUE_REQ) 2867 targ->dv_state_retry--; 2868 if ((status & SS_ERRMASK) == EBUSY) 2869 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY); 2870 if (targ->dv_state_retry < 10) 2871 break; 2872 /* FALLTHROUGH */ 2873 default: 2874 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); 2875 #ifdef AHD_DEBUG 2876 if (ahd_debug & AHD_SHOW_DV) { 2877 ahd_print_devinfo(ahd, devinfo); 2878 printf("Failed DV inquiry, skipping\n"); 2879 } 2880 #endif 2881 break; 2882 } 2883 break; 2884 case AHD_DV_STATE_INQ_ASYNC_VERIFY: 2885 switch (status & SS_MASK) { 2886 case SS_NOP: 2887 { 2888 u_int xportflags; 2889 u_int spi3data; 2890 2891 if (memcmp(targ->inq_data, targ->dv_buffer, 2892 AHD_LINUX_DV_INQ_LEN) != 0) { 2893 /* 2894 * Inquiry data must have changed. 2895 * Try from the top again. 2896 */ 2897 AHD_SET_DV_STATE(ahd, targ, 2898 AHD_DV_STATE_INQ_SHORT_ASYNC); 2899 break; 2900 } 2901 2902 AHD_SET_DV_STATE(ahd, targ, targ->dv_state+1); 2903 targ->flags |= AHD_INQ_VALID; 2904 if (ahd_linux_user_dv_setting(ahd) == 0) 2905 break; 2906 2907 xportflags = targ->inq_data->flags; 2908 if ((xportflags & (SID_Sync|SID_WBus16)) == 0) 2909 break; 2910 2911 spi3data = targ->inq_data->spi3data; 2912 switch (spi3data & SID_SPI_CLOCK_DT_ST) { 2913 default: 2914 case SID_SPI_CLOCK_ST: 2915 /* Assume only basic DV is supported. */ 2916 targ->flags |= AHD_BASIC_DV; 2917 break; 2918 case SID_SPI_CLOCK_DT: 2919 case SID_SPI_CLOCK_DT_ST: 2920 targ->flags |= AHD_ENHANCED_DV; 2921 break; 2922 } 2923 break; 2924 } 2925 case SS_INQ_REFRESH: 2926 AHD_SET_DV_STATE(ahd, targ, 2927 AHD_DV_STATE_INQ_SHORT_ASYNC); 2928 break; 2929 case SS_TUR: 2930 case SS_RETRY: 2931 AHD_SET_DV_STATE(ahd, targ, targ->dv_state); 2932 if (ahd_cmd_get_transaction_status(cmd) 2933 == CAM_REQUEUE_REQ) 2934 targ->dv_state_retry--; 2935 2936 if ((status & SS_ERRMASK) == EBUSY) 2937 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY); 2938 if (targ->dv_state_retry < 10) 2939 break; 2940 /* FALLTHROUGH */ 2941 default: 2942 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); 2943 #ifdef AHD_DEBUG 2944 if (ahd_debug & AHD_SHOW_DV) { 2945 ahd_print_devinfo(ahd, devinfo); 2946 printf("Failed DV inquiry, skipping\n"); 2947 } 2948 #endif 2949 break; 2950 } 2951 break; 2952 case AHD_DV_STATE_INQ_VERIFY: 2953 switch (status & SS_MASK) { 2954 case SS_NOP: 2955 { 2956 2957 if (memcmp(targ->inq_data, targ->dv_buffer, 2958 AHD_LINUX_DV_INQ_LEN) == 0) { 2959 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); 2960 break; 2961 } 2962 2963 #ifdef AHD_DEBUG 2964 if (ahd_debug & AHD_SHOW_DV) { 2965 int i; 2966 2967 ahd_print_devinfo(ahd, devinfo); 2968 printf("Inquiry buffer mismatch:"); 2969 for (i = 0; i < AHD_LINUX_DV_INQ_LEN; i++) { 2970 if ((i & 0xF) == 0) 2971 printf("\n "); 2972 printf("0x%x:0x0%x ", 2973 ((uint8_t *)targ->inq_data)[i], 2974 targ->dv_buffer[i]); 2975 } 2976 printf("\n"); 2977 } 2978 #endif 2979 2980 if (ahd_linux_dv_fallback(ahd, devinfo) != 0) { 2981 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); 2982 break; 2983 } 2984 /* 2985 * Do not count "falling back" 2986 * against our retries. 2987 */ 2988 targ->dv_state_retry = 0; 2989 AHD_SET_DV_STATE(ahd, targ, targ->dv_state); 2990 break; 2991 } 2992 case SS_INQ_REFRESH: 2993 AHD_SET_DV_STATE(ahd, targ, 2994 AHD_DV_STATE_INQ_SHORT_ASYNC); 2995 break; 2996 case SS_TUR: 2997 case SS_RETRY: 2998 AHD_SET_DV_STATE(ahd, targ, targ->dv_state); 2999 if (ahd_cmd_get_transaction_status(cmd) 3000 == CAM_REQUEUE_REQ) { 3001 targ->dv_state_retry--; 3002 } else if ((status & SSQ_FALLBACK) != 0) { 3003 if (ahd_linux_dv_fallback(ahd, devinfo) != 0) { 3004 AHD_SET_DV_STATE(ahd, targ, 3005 AHD_DV_STATE_EXIT); 3006 break; 3007 } 3008 /* 3009 * Do not count "falling back" 3010 * against our retries. 3011 */ 3012 targ->dv_state_retry = 0; 3013 } else if ((status & SS_ERRMASK) == EBUSY) 3014 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY); 3015 if (targ->dv_state_retry < 10) 3016 break; 3017 /* FALLTHROUGH */ 3018 default: 3019 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); 3020 #ifdef AHD_DEBUG 3021 if (ahd_debug & AHD_SHOW_DV) { 3022 ahd_print_devinfo(ahd, devinfo); 3023 printf("Failed DV inquiry, skipping\n"); 3024 } 3025 #endif 3026 break; 3027 } 3028 break; 3029 3030 case AHD_DV_STATE_TUR: 3031 switch (status & SS_MASK) { 3032 case SS_NOP: 3033 if ((targ->flags & AHD_BASIC_DV) != 0) { 3034 ahd_linux_filter_inquiry(ahd, devinfo); 3035 AHD_SET_DV_STATE(ahd, targ, 3036 AHD_DV_STATE_INQ_VERIFY); 3037 } else if ((targ->flags & AHD_ENHANCED_DV) != 0) { 3038 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_REBD); 3039 } else { 3040 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); 3041 } 3042 break; 3043 case SS_RETRY: 3044 case SS_TUR: 3045 if ((status & SS_ERRMASK) == EBUSY) { 3046 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY); 3047 break; 3048 } 3049 AHD_SET_DV_STATE(ahd, targ, targ->dv_state); 3050 if (ahd_cmd_get_transaction_status(cmd) 3051 == CAM_REQUEUE_REQ) { 3052 targ->dv_state_retry--; 3053 } else if ((status & SSQ_FALLBACK) != 0) { 3054 if (ahd_linux_dv_fallback(ahd, devinfo) != 0) { 3055 AHD_SET_DV_STATE(ahd, targ, 3056 AHD_DV_STATE_EXIT); 3057 break; 3058 } 3059 /* 3060 * Do not count "falling back" 3061 * against our retries. 3062 */ 3063 targ->dv_state_retry = 0; 3064 } 3065 if (targ->dv_state_retry >= 10) { 3066 #ifdef AHD_DEBUG 3067 if (ahd_debug & AHD_SHOW_DV) { 3068 ahd_print_devinfo(ahd, devinfo); 3069 printf("DV TUR reties exhausted\n"); 3070 } 3071 #endif 3072 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); 3073 break; 3074 } 3075 if (status & SSQ_DELAY) 3076 ssleep(1); 3077 3078 break; 3079 case SS_START: 3080 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_SU); 3081 break; 3082 case SS_INQ_REFRESH: 3083 AHD_SET_DV_STATE(ahd, targ, 3084 AHD_DV_STATE_INQ_SHORT_ASYNC); 3085 break; 3086 default: 3087 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); 3088 break; 3089 } 3090 break; 3091 3092 case AHD_DV_STATE_REBD: 3093 switch (status & SS_MASK) { 3094 case SS_NOP: 3095 { 3096 uint32_t echo_size; 3097 3098 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_WEB); 3099 echo_size = scsi_3btoul(&targ->dv_buffer[1]); 3100 echo_size &= 0x1FFF; 3101 #ifdef AHD_DEBUG 3102 if (ahd_debug & AHD_SHOW_DV) { 3103 ahd_print_devinfo(ahd, devinfo); 3104 printf("Echo buffer size= %d\n", echo_size); 3105 } 3106 #endif 3107 if (echo_size == 0) { 3108 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); 3109 break; 3110 } 3111 3112 /* Generate the buffer pattern */ 3113 targ->dv_echo_size = echo_size; 3114 ahd_linux_generate_dv_pattern(targ); 3115 /* 3116 * Setup initial negotiation values. 3117 */ 3118 ahd_linux_filter_inquiry(ahd, devinfo); 3119 break; 3120 } 3121 case SS_INQ_REFRESH: 3122 AHD_SET_DV_STATE(ahd, targ, 3123 AHD_DV_STATE_INQ_SHORT_ASYNC); 3124 break; 3125 case SS_RETRY: 3126 AHD_SET_DV_STATE(ahd, targ, targ->dv_state); 3127 if (ahd_cmd_get_transaction_status(cmd) 3128 == CAM_REQUEUE_REQ) 3129 targ->dv_state_retry--; 3130 if (targ->dv_state_retry <= 10) 3131 break; 3132 #ifdef AHD_DEBUG 3133 if (ahd_debug & AHD_SHOW_DV) { 3134 ahd_print_devinfo(ahd, devinfo); 3135 printf("DV REBD reties exhausted\n"); 3136 } 3137 #endif 3138 /* FALLTHROUGH */ 3139 case SS_FATAL: 3140 default: 3141 /* 3142 * Setup initial negotiation values 3143 * and try level 1 DV. 3144 */ 3145 ahd_linux_filter_inquiry(ahd, devinfo); 3146 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_INQ_VERIFY); 3147 targ->dv_echo_size = 0; 3148 break; 3149 } 3150 break; 3151 3152 case AHD_DV_STATE_WEB: 3153 switch (status & SS_MASK) { 3154 case SS_NOP: 3155 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_REB); 3156 break; 3157 case SS_INQ_REFRESH: 3158 AHD_SET_DV_STATE(ahd, targ, 3159 AHD_DV_STATE_INQ_SHORT_ASYNC); 3160 break; 3161 case SS_RETRY: 3162 AHD_SET_DV_STATE(ahd, targ, targ->dv_state); 3163 if (ahd_cmd_get_transaction_status(cmd) 3164 == CAM_REQUEUE_REQ) { 3165 targ->dv_state_retry--; 3166 } else if ((status & SSQ_FALLBACK) != 0) { 3167 if (ahd_linux_dv_fallback(ahd, devinfo) != 0) { 3168 AHD_SET_DV_STATE(ahd, targ, 3169 AHD_DV_STATE_EXIT); 3170 break; 3171 } 3172 /* 3173 * Do not count "falling back" 3174 * against our retries. 3175 */ 3176 targ->dv_state_retry = 0; 3177 } 3178 if (targ->dv_state_retry <= 10) 3179 break; 3180 /* FALLTHROUGH */ 3181 #ifdef AHD_DEBUG 3182 if (ahd_debug & AHD_SHOW_DV) { 3183 ahd_print_devinfo(ahd, devinfo); 3184 printf("DV WEB reties exhausted\n"); 3185 } 3186 #endif 3187 default: 3188 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); 3189 break; 3190 } 3191 break; 3192 3193 case AHD_DV_STATE_REB: 3194 switch (status & SS_MASK) { 3195 case SS_NOP: 3196 if (memcmp(targ->dv_buffer, targ->dv_buffer1, 3197 targ->dv_echo_size) != 0) { 3198 if (ahd_linux_dv_fallback(ahd, devinfo) != 0) 3199 AHD_SET_DV_STATE(ahd, targ, 3200 AHD_DV_STATE_EXIT); 3201 else 3202 AHD_SET_DV_STATE(ahd, targ, 3203 AHD_DV_STATE_WEB); 3204 break; 3205 } 3206 3207 if (targ->dv_buffer != NULL) { 3208 free(targ->dv_buffer, M_DEVBUF); 3209 targ->dv_buffer = NULL; 3210 } 3211 if (targ->dv_buffer1 != NULL) { 3212 free(targ->dv_buffer1, M_DEVBUF); 3213 targ->dv_buffer1 = NULL; 3214 } 3215 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); 3216 break; 3217 case SS_INQ_REFRESH: 3218 AHD_SET_DV_STATE(ahd, targ, 3219 AHD_DV_STATE_INQ_SHORT_ASYNC); 3220 break; 3221 case SS_RETRY: 3222 AHD_SET_DV_STATE(ahd, targ, targ->dv_state); 3223 if (ahd_cmd_get_transaction_status(cmd) 3224 == CAM_REQUEUE_REQ) { 3225 targ->dv_state_retry--; 3226 } else if ((status & SSQ_FALLBACK) != 0) { 3227 if (ahd_linux_dv_fallback(ahd, devinfo) != 0) { 3228 AHD_SET_DV_STATE(ahd, targ, 3229 AHD_DV_STATE_EXIT); 3230 break; 3231 } 3232 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_WEB); 3233 } 3234 if (targ->dv_state_retry <= 10) { 3235 if ((status & (SSQ_DELAY_RANDOM|SSQ_DELAY))!= 0) 3236 msleep(ahd->our_id*1000/10); 3237 break; 3238 } 3239 #ifdef AHD_DEBUG 3240 if (ahd_debug & AHD_SHOW_DV) { 3241 ahd_print_devinfo(ahd, devinfo); 3242 printf("DV REB reties exhausted\n"); 3243 } 3244 #endif 3245 /* FALLTHROUGH */ 3246 default: 3247 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); 3248 break; 3249 } 3250 break; 3251 3252 case AHD_DV_STATE_SU: 3253 switch (status & SS_MASK) { 3254 case SS_NOP: 3255 case SS_INQ_REFRESH: 3256 AHD_SET_DV_STATE(ahd, targ, 3257 AHD_DV_STATE_INQ_SHORT_ASYNC); 3258 break; 3259 default: 3260 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); 3261 break; 3262 } 3263 break; 3264 3265 case AHD_DV_STATE_BUSY: 3266 switch (status & SS_MASK) { 3267 case SS_NOP: 3268 case SS_INQ_REFRESH: 3269 AHD_SET_DV_STATE(ahd, targ, 3270 AHD_DV_STATE_INQ_SHORT_ASYNC); 3271 break; 3272 case SS_TUR: 3273 case SS_RETRY: 3274 AHD_SET_DV_STATE(ahd, targ, targ->dv_state); 3275 if (ahd_cmd_get_transaction_status(cmd) 3276 == CAM_REQUEUE_REQ) { 3277 targ->dv_state_retry--; 3278 } else if (targ->dv_state_retry < 60) { 3279 if ((status & SSQ_DELAY) != 0) 3280 ssleep(1); 3281 } else { 3282 #ifdef AHD_DEBUG 3283 if (ahd_debug & AHD_SHOW_DV) { 3284 ahd_print_devinfo(ahd, devinfo); 3285 printf("DV BUSY reties exhausted\n"); 3286 } 3287 #endif 3288 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); 3289 } 3290 break; 3291 default: 3292 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); 3293 break; 3294 } 3295 break; 3296 3297 default: 3298 printf("%s: Invalid DV completion state %d\n", ahd_name(ahd), 3299 targ->dv_state); 3300 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); 3301 break; 3302 } 3303 } 3304 3305 static void 3306 ahd_linux_dv_fill_cmd(struct ahd_softc *ahd, struct scsi_cmnd *cmd, 3307 struct ahd_devinfo *devinfo) 3308 { 3309 memset(cmd, 0, sizeof(struct scsi_cmnd)); 3310 cmd->device = ahd->platform_data->dv_scsi_dev; 3311 cmd->scsi_done = ahd_linux_dv_complete; 3312 } 3313 3314 /* 3315 * Synthesize an inquiry command. On the return trip, it'll be 3316 * sniffed and the device transfer settings set for us. 3317 */ 3318 static void 3319 ahd_linux_dv_inq(struct ahd_softc *ahd, struct scsi_cmnd *cmd, 3320 struct ahd_devinfo *devinfo, struct ahd_linux_target *targ, 3321 u_int request_length) 3322 { 3323 3324 #ifdef AHD_DEBUG 3325 if (ahd_debug & AHD_SHOW_DV) { 3326 ahd_print_devinfo(ahd, devinfo); 3327 printf("Sending INQ\n"); 3328 } 3329 #endif 3330 if (targ->inq_data == NULL) 3331 targ->inq_data = malloc(AHD_LINUX_DV_INQ_LEN, 3332 M_DEVBUF, M_WAITOK); 3333 if (targ->dv_state > AHD_DV_STATE_INQ_ASYNC) { 3334 if (targ->dv_buffer != NULL) 3335 free(targ->dv_buffer, M_DEVBUF); 3336 targ->dv_buffer = malloc(AHD_LINUX_DV_INQ_LEN, 3337 M_DEVBUF, M_WAITOK); 3338 } 3339 3340 ahd_linux_dv_fill_cmd(ahd, cmd, devinfo); 3341 cmd->sc_data_direction = SCSI_DATA_READ; 3342 cmd->cmd_len = 6; 3343 cmd->cmnd[0] = INQUIRY; 3344 cmd->cmnd[4] = request_length; 3345 cmd->request_bufflen = request_length; 3346 if (targ->dv_state > AHD_DV_STATE_INQ_ASYNC) 3347 cmd->request_buffer = targ->dv_buffer; 3348 else 3349 cmd->request_buffer = targ->inq_data; 3350 memset(cmd->request_buffer, 0, AHD_LINUX_DV_INQ_LEN); 3351 } 3352 3353 static void 3354 ahd_linux_dv_tur(struct ahd_softc *ahd, struct scsi_cmnd *cmd, 3355 struct ahd_devinfo *devinfo) 3356 { 3357 3358 #ifdef AHD_DEBUG 3359 if (ahd_debug & AHD_SHOW_DV) { 3360 ahd_print_devinfo(ahd, devinfo); 3361 printf("Sending TUR\n"); 3362 } 3363 #endif 3364 /* Do a TUR to clear out any non-fatal transitional state */ 3365 ahd_linux_dv_fill_cmd(ahd, cmd, devinfo); 3366 cmd->sc_data_direction = SCSI_DATA_NONE; 3367 cmd->cmd_len = 6; 3368 cmd->cmnd[0] = TEST_UNIT_READY; 3369 } 3370 3371 #define AHD_REBD_LEN 4 3372 3373 static void 3374 ahd_linux_dv_rebd(struct ahd_softc *ahd, struct scsi_cmnd *cmd, 3375 struct ahd_devinfo *devinfo, struct ahd_linux_target *targ) 3376 { 3377 3378 #ifdef AHD_DEBUG 3379 if (ahd_debug & AHD_SHOW_DV) { 3380 ahd_print_devinfo(ahd, devinfo); 3381 printf("Sending REBD\n"); 3382 } 3383 #endif 3384 if (targ->dv_buffer != NULL) 3385 free(targ->dv_buffer, M_DEVBUF); 3386 targ->dv_buffer = malloc(AHD_REBD_LEN, M_DEVBUF, M_WAITOK); 3387 ahd_linux_dv_fill_cmd(ahd, cmd, devinfo); 3388 cmd->sc_data_direction = SCSI_DATA_READ; 3389 cmd->cmd_len = 10; 3390 cmd->cmnd[0] = READ_BUFFER; 3391 cmd->cmnd[1] = 0x0b; 3392 scsi_ulto3b(AHD_REBD_LEN, &cmd->cmnd[6]); 3393 cmd->request_bufflen = AHD_REBD_LEN; 3394 cmd->underflow = cmd->request_bufflen; 3395 cmd->request_buffer = targ->dv_buffer; 3396 } 3397 3398 static void 3399 ahd_linux_dv_web(struct ahd_softc *ahd, struct scsi_cmnd *cmd, 3400 struct ahd_devinfo *devinfo, struct ahd_linux_target *targ) 3401 { 3402 3403 #ifdef AHD_DEBUG 3404 if (ahd_debug & AHD_SHOW_DV) { 3405 ahd_print_devinfo(ahd, devinfo); 3406 printf("Sending WEB\n"); 3407 } 3408 #endif 3409 ahd_linux_dv_fill_cmd(ahd, cmd, devinfo); 3410 cmd->sc_data_direction = SCSI_DATA_WRITE; 3411 cmd->cmd_len = 10; 3412 cmd->cmnd[0] = WRITE_BUFFER; 3413 cmd->cmnd[1] = 0x0a; 3414 scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]); 3415 cmd->request_bufflen = targ->dv_echo_size; 3416 cmd->underflow = cmd->request_bufflen; 3417 cmd->request_buffer = targ->dv_buffer; 3418 } 3419 3420 static void 3421 ahd_linux_dv_reb(struct ahd_softc *ahd, struct scsi_cmnd *cmd, 3422 struct ahd_devinfo *devinfo, struct ahd_linux_target *targ) 3423 { 3424 3425 #ifdef AHD_DEBUG 3426 if (ahd_debug & AHD_SHOW_DV) { 3427 ahd_print_devinfo(ahd, devinfo); 3428 printf("Sending REB\n"); 3429 } 3430 #endif 3431 ahd_linux_dv_fill_cmd(ahd, cmd, devinfo); 3432 cmd->sc_data_direction = SCSI_DATA_READ; 3433 cmd->cmd_len = 10; 3434 cmd->cmnd[0] = READ_BUFFER; 3435 cmd->cmnd[1] = 0x0a; 3436 scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]); 3437 cmd->request_bufflen = targ->dv_echo_size; 3438 cmd->underflow = cmd->request_bufflen; 3439 cmd->request_buffer = targ->dv_buffer1; 3440 } 3441 3442 static void 3443 ahd_linux_dv_su(struct ahd_softc *ahd, struct scsi_cmnd *cmd, 3444 struct ahd_devinfo *devinfo, 3445 struct ahd_linux_target *targ) 3446 { 3447 u_int le; 3448 3449 le = SID_IS_REMOVABLE(targ->inq_data) ? SSS_LOEJ : 0; 3450 3451 #ifdef AHD_DEBUG 3452 if (ahd_debug & AHD_SHOW_DV) { 3453 ahd_print_devinfo(ahd, devinfo); 3454 printf("Sending SU\n"); 3455 } 3456 #endif 3457 ahd_linux_dv_fill_cmd(ahd, cmd, devinfo); 3458 cmd->sc_data_direction = SCSI_DATA_NONE; 3459 cmd->cmd_len = 6; 3460 cmd->cmnd[0] = START_STOP_UNIT; 3461 cmd->cmnd[4] = le | SSS_START; 3462 } 3463 3464 static int 3465 ahd_linux_fallback(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) 3466 { 3467 struct ahd_linux_target *targ; 3468 struct ahd_initiator_tinfo *tinfo; 3469 struct ahd_transinfo *goal; 3470 struct ahd_tmode_tstate *tstate; 3471 u_int width; 3472 u_int period; 3473 u_int offset; 3474 u_int ppr_options; 3475 u_int cur_speed; 3476 u_int wide_speed; 3477 u_int narrow_speed; 3478 u_int fallback_speed; 3479 3480 #ifdef AHD_DEBUG 3481 if (ahd_debug & AHD_SHOW_DV) { 3482 ahd_print_devinfo(ahd, devinfo); 3483 printf("Trying to fallback\n"); 3484 } 3485 #endif 3486 targ = ahd->platform_data->targets[devinfo->target_offset]; 3487 tinfo = ahd_fetch_transinfo(ahd, devinfo->channel, 3488 devinfo->our_scsiid, 3489 devinfo->target, &tstate); 3490 goal = &tinfo->goal; 3491 width = goal->width; 3492 period = goal->period; 3493 offset = goal->offset; 3494 ppr_options = goal->ppr_options; 3495 if (offset == 0) 3496 period = AHD_ASYNC_XFER_PERIOD; 3497 if (targ->dv_next_narrow_period == 0) 3498 targ->dv_next_narrow_period = MAX(period, AHD_SYNCRATE_ULTRA2); 3499 if (targ->dv_next_wide_period == 0) 3500 targ->dv_next_wide_period = period; 3501 if (targ->dv_max_width == 0) 3502 targ->dv_max_width = width; 3503 if (targ->dv_max_ppr_options == 0) 3504 targ->dv_max_ppr_options = ppr_options; 3505 if (targ->dv_last_ppr_options == 0) 3506 targ->dv_last_ppr_options = ppr_options; 3507 3508 cur_speed = aic_calc_speed(width, period, offset, AHD_SYNCRATE_MIN); 3509 wide_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_16_BIT, 3510 targ->dv_next_wide_period, 3511 MAX_OFFSET, AHD_SYNCRATE_MIN); 3512 narrow_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_8_BIT, 3513 targ->dv_next_narrow_period, 3514 MAX_OFFSET, AHD_SYNCRATE_MIN); 3515 fallback_speed = aic_calc_speed(width, period+1, offset, 3516 AHD_SYNCRATE_MIN); 3517 #ifdef AHD_DEBUG 3518 if (ahd_debug & AHD_SHOW_DV) { 3519 printf("cur_speed= %d, wide_speed= %d, narrow_speed= %d, " 3520 "fallback_speed= %d\n", cur_speed, wide_speed, 3521 narrow_speed, fallback_speed); 3522 } 3523 #endif 3524 3525 if (cur_speed > 160000) { 3526 /* 3527 * Paced/DT/IU_REQ only transfer speeds. All we 3528 * can do is fallback in terms of syncrate. 3529 */ 3530 period++; 3531 } else if (cur_speed > 80000) { 3532 if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 3533 /* 3534 * Try without IU_REQ as it may be confusing 3535 * an expander. 3536 */ 3537 ppr_options &= ~MSG_EXT_PPR_IU_REQ; 3538 } else { 3539 /* 3540 * Paced/DT only transfer speeds. All we 3541 * can do is fallback in terms of syncrate. 3542 */ 3543 period++; 3544 ppr_options = targ->dv_max_ppr_options; 3545 } 3546 } else if (cur_speed > 3300) { 3547 3548 /* 3549 * In this range we the following 3550 * options ordered from highest to 3551 * lowest desireability: 3552 * 3553 * o Wide/DT 3554 * o Wide/non-DT 3555 * o Narrow at a potentally higher sync rate. 3556 * 3557 * All modes are tested with and without IU_REQ 3558 * set since using IUs may confuse an expander. 3559 */ 3560 if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 3561 3562 ppr_options &= ~MSG_EXT_PPR_IU_REQ; 3563 } else if ((ppr_options & MSG_EXT_PPR_DT_REQ) != 0) { 3564 /* 3565 * Try going non-DT. 3566 */ 3567 ppr_options = targ->dv_max_ppr_options; 3568 ppr_options &= ~MSG_EXT_PPR_DT_REQ; 3569 } else if (targ->dv_last_ppr_options != 0) { 3570 /* 3571 * Try without QAS or any other PPR options. 3572 * We may need a non-PPR message to work with 3573 * an expander. We look at the "last PPR options" 3574 * so we will perform this fallback even if the 3575 * target responded to our PPR negotiation with 3576 * no option bits set. 3577 */ 3578 ppr_options = 0; 3579 } else if (width == MSG_EXT_WDTR_BUS_16_BIT) { 3580 /* 3581 * If the next narrow speed is greater than 3582 * the next wide speed, fallback to narrow. 3583 * Otherwise fallback to the next DT/Wide setting. 3584 * The narrow async speed will always be smaller 3585 * than the wide async speed, so handle this case 3586 * specifically. 3587 */ 3588 ppr_options = targ->dv_max_ppr_options; 3589 if (narrow_speed > fallback_speed 3590 || period >= AHD_ASYNC_XFER_PERIOD) { 3591 targ->dv_next_wide_period = period+1; 3592 width = MSG_EXT_WDTR_BUS_8_BIT; 3593 period = targ->dv_next_narrow_period; 3594 } else { 3595 period++; 3596 } 3597 } else if ((ahd->features & AHD_WIDE) != 0 3598 && targ->dv_max_width != 0 3599 && wide_speed >= fallback_speed 3600 && (targ->dv_next_wide_period <= AHD_ASYNC_XFER_PERIOD 3601 || period >= AHD_ASYNC_XFER_PERIOD)) { 3602 3603 /* 3604 * We are narrow. Try falling back 3605 * to the next wide speed with 3606 * all supported ppr options set. 3607 */ 3608 targ->dv_next_narrow_period = period+1; 3609 width = MSG_EXT_WDTR_BUS_16_BIT; 3610 period = targ->dv_next_wide_period; 3611 ppr_options = targ->dv_max_ppr_options; 3612 } else { 3613 /* Only narrow fallback is allowed. */ 3614 period++; 3615 ppr_options = targ->dv_max_ppr_options; 3616 } 3617 } else { 3618 return (-1); 3619 } 3620 offset = MAX_OFFSET; 3621 ahd_find_syncrate(ahd, &period, &ppr_options, AHD_SYNCRATE_PACED); 3622 ahd_set_width(ahd, devinfo, width, AHD_TRANS_GOAL, FALSE); 3623 if (period == 0) { 3624 period = 0; 3625 offset = 0; 3626 ppr_options = 0; 3627 if (width == MSG_EXT_WDTR_BUS_8_BIT) 3628 targ->dv_next_narrow_period = AHD_ASYNC_XFER_PERIOD; 3629 else 3630 targ->dv_next_wide_period = AHD_ASYNC_XFER_PERIOD; 3631 } 3632 ahd_set_syncrate(ahd, devinfo, period, offset, 3633 ppr_options, AHD_TRANS_GOAL, FALSE); 3634 targ->dv_last_ppr_options = ppr_options; 3635 return (0); 3636 } 3637 3638 static void 3639 ahd_linux_dv_timeout(struct scsi_cmnd *cmd) 3640 { 3641 struct ahd_softc *ahd; 3642 struct scb *scb; 3643 u_long flags; 3644 3645 ahd = *((struct ahd_softc **)cmd->device->host->hostdata); 3646 ahd_lock(ahd, &flags); 3647 3648 #ifdef AHD_DEBUG 3649 if (ahd_debug & AHD_SHOW_DV) { 3650 printf("%s: Timeout while doing DV command %x.\n", 3651 ahd_name(ahd), cmd->cmnd[0]); 3652 ahd_dump_card_state(ahd); 3653 } 3654 #endif 3655 3656 /* 3657 * Guard against "done race". No action is 3658 * required if we just completed. 3659 */ 3660 if ((scb = (struct scb *)cmd->host_scribble) == NULL) { 3661 ahd_unlock(ahd, &flags); 3662 return; 3663 } 3664 3665 /* 3666 * Command has not completed. Mark this 3667 * SCB as having failing status prior to 3668 * resetting the bus, so we get the correct 3669 * error code. 3670 */ 3671 if ((scb->flags & SCB_SENSE) != 0) 3672 ahd_set_transaction_status(scb, CAM_AUTOSENSE_FAIL); 3673 else 3674 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); 3675 ahd_reset_channel(ahd, cmd->device->channel + 'A', /*initiate*/TRUE); 3676 3677 /* 3678 * Add a minimal bus settle delay for devices that are slow to 3679 * respond after bus resets. 3680 */ 3681 ahd_freeze_simq(ahd); 3682 init_timer(&ahd->platform_data->reset_timer); 3683 ahd->platform_data->reset_timer.data = (u_long)ahd; 3684 ahd->platform_data->reset_timer.expires = jiffies + HZ / 2; 3685 ahd->platform_data->reset_timer.function = 3686 (ahd_linux_callback_t *)ahd_release_simq; 3687 add_timer(&ahd->platform_data->reset_timer); 3688 if (ahd_linux_next_device_to_run(ahd) != NULL) 3689 ahd_schedule_runq(ahd); 3690 ahd_linux_run_complete_queue(ahd); 3691 ahd_unlock(ahd, &flags); 3692 } 3693 3694 static void 3695 ahd_linux_dv_complete(struct scsi_cmnd *cmd) 3696 { 3697 struct ahd_softc *ahd; 3698 3699 ahd = *((struct ahd_softc **)cmd->device->host->hostdata); 3700 3701 /* Delete the DV timer before it goes off! */ 3702 scsi_delete_timer(cmd); 3703 3704 #ifdef AHD_DEBUG 3705 if (ahd_debug & AHD_SHOW_DV) 3706 printf("%s:%c:%d: Command completed, status= 0x%x\n", 3707 ahd_name(ahd), cmd->device->channel, cmd->device->id, 3708 cmd->result); 3709 #endif 3710 3711 /* Wake up the state machine */ 3712 up(&ahd->platform_data->dv_cmd_sem); 3713 } 3714 3715 static void 3716 ahd_linux_generate_dv_pattern(struct ahd_linux_target *targ) 3717 { 3718 uint16_t b; 3719 u_int i; 3720 u_int j; 3721 3722 if (targ->dv_buffer != NULL) 3723 free(targ->dv_buffer, M_DEVBUF); 3724 targ->dv_buffer = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK); 3725 if (targ->dv_buffer1 != NULL) 3726 free(targ->dv_buffer1, M_DEVBUF); 3727 targ->dv_buffer1 = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK); 3728 3729 i = 0; 3730 3731 b = 0x0001; 3732 for (j = 0 ; i < targ->dv_echo_size; j++) { 3733 if (j < 32) { 3734 /* 3735 * 32bytes of sequential numbers. 3736 */ 3737 targ->dv_buffer[i++] = j & 0xff; 3738 } else if (j < 48) { 3739 /* 3740 * 32bytes of repeating 0x0000, 0xffff. 3741 */ 3742 targ->dv_buffer[i++] = (j & 0x02) ? 0xff : 0x00; 3743 } else if (j < 64) { 3744 /* 3745 * 32bytes of repeating 0x5555, 0xaaaa. 3746 */ 3747 targ->dv_buffer[i++] = (j & 0x02) ? 0xaa : 0x55; 3748 } else { 3749 /* 3750 * Remaining buffer is filled with a repeating 3751 * patter of: 3752 * 3753 * 0xffff 3754 * ~0x0001 << shifted once in each loop. 3755 */ 3756 if (j & 0x02) { 3757 if (j & 0x01) { 3758 targ->dv_buffer[i++] = ~(b >> 8) & 0xff; 3759 b <<= 1; 3760 if (b == 0x0000) 3761 b = 0x0001; 3762 } else { 3763 targ->dv_buffer[i++] = (~b & 0xff); 3764 } 3765 } else { 3766 targ->dv_buffer[i++] = 0xff; 3767 } 3768 } 3769 } 3770 } 3771 3772 static u_int 3773 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) 3774 { 3775 static int warned_user; 3776 u_int tags; 3777 3778 tags = 0; 3779 if ((ahd->user_discenable & devinfo->target_mask) != 0) { 3780 if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) { 3781 3782 if (warned_user == 0) { 3783 printf(KERN_WARNING 3784 "aic79xx: WARNING: Insufficient tag_info instances\n" 3785 "aic79xx: for installed controllers. Using defaults\n" 3786 "aic79xx: Please update the aic79xx_tag_info array in\n" 3787 "aic79xx: the aic79xx_osm.c source file.\n"); 3788 warned_user++; 3789 } 3790 tags = AHD_MAX_QUEUE; 3791 } else { 3792 adapter_tag_info_t *tag_info; 3793 3794 tag_info = &aic79xx_tag_info[ahd->unit]; 3795 tags = tag_info->tag_commands[devinfo->target_offset]; 3796 if (tags > AHD_MAX_QUEUE) 3797 tags = AHD_MAX_QUEUE; 3798 } 3799 } 3800 return (tags); 3801 } 3802 3803 static u_int 3804 ahd_linux_user_dv_setting(struct ahd_softc *ahd) 3805 { 3806 static int warned_user; 3807 int dv; 3808 3809 if (ahd->unit >= NUM_ELEMENTS(aic79xx_dv_settings)) { 3810 3811 if (warned_user == 0) { 3812 printf(KERN_WARNING 3813 "aic79xx: WARNING: Insufficient dv settings instances\n" 3814 "aic79xx: for installed controllers. Using defaults\n" 3815 "aic79xx: Please update the aic79xx_dv_settings array in" 3816 "aic79xx: the aic79xx_osm.c source file.\n"); 3817 warned_user++; 3818 } 3819 dv = -1; 3820 } else { 3821 3822 dv = aic79xx_dv_settings[ahd->unit]; 3823 } 3824 3825 if (dv < 0) { 3826 /* 3827 * Apply the default. 3828 */ 3829 dv = 1; 3830 if (ahd->seep_config != 0) 3831 dv = (ahd->seep_config->bios_control & CFENABLEDV); 3832 } 3833 return (dv); 3834 } 3835 3836 static void 3837 ahd_linux_setup_user_rd_strm_settings(struct ahd_softc *ahd) 3838 { 3839 static int warned_user; 3840 u_int rd_strm_mask; 3841 u_int target_id; 3842 3843 /* 3844 * If we have specific read streaming info for this controller, 3845 * apply it. Otherwise use the defaults. 3846 */ 3847 if (ahd->unit >= NUM_ELEMENTS(aic79xx_rd_strm_info)) { 3848 3849 if (warned_user == 0) { 3850 3851 printf(KERN_WARNING 3852 "aic79xx: WARNING: Insufficient rd_strm instances\n" 3853 "aic79xx: for installed controllers. Using defaults\n" 3854 "aic79xx: Please update the aic79xx_rd_strm_info array\n" 3855 "aic79xx: in the aic79xx_osm.c source file.\n"); 3856 warned_user++; 3857 } 3858 rd_strm_mask = AIC79XX_CONFIGED_RD_STRM; 3859 } else { 3860 3861 rd_strm_mask = aic79xx_rd_strm_info[ahd->unit]; 3862 } 3863 for (target_id = 0; target_id < 16; target_id++) { 3864 struct ahd_devinfo devinfo; 3865 struct ahd_initiator_tinfo *tinfo; 3866 struct ahd_tmode_tstate *tstate; 3867 3868 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 3869 target_id, &tstate); 3870 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, 3871 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); 3872 tinfo->user.ppr_options &= ~MSG_EXT_PPR_RD_STRM; 3873 if ((rd_strm_mask & devinfo.target_mask) != 0) 3874 tinfo->user.ppr_options |= MSG_EXT_PPR_RD_STRM; 3875 } 3876 } 3877 3878 /* 3879 * Determines the queue depth for a given device. 3880 */ 3881 static void 3882 ahd_linux_device_queue_depth(struct ahd_softc *ahd, 3883 struct ahd_linux_device *dev) 3884 { 3885 struct ahd_devinfo devinfo; 3886 u_int tags; 3887 3888 ahd_compile_devinfo(&devinfo, 3889 ahd->our_id, 3890 dev->target->target, dev->lun, 3891 dev->target->channel == 0 ? 'A' : 'B', 3892 ROLE_INITIATOR); 3893 tags = ahd_linux_user_tagdepth(ahd, &devinfo); 3894 if (tags != 0 3895 && dev->scsi_device != NULL 3896 && dev->scsi_device->tagged_supported != 0) { 3897 3898 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED); 3899 ahd_print_devinfo(ahd, &devinfo); 3900 printf("Tagged Queuing enabled. Depth %d\n", tags); 3901 } else { 3902 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE); 3903 } 3904 } 3905 3906 static void 3907 ahd_linux_run_device_queue(struct ahd_softc *ahd, struct ahd_linux_device *dev) 3908 { 3909 struct ahd_cmd *acmd; 3910 struct scsi_cmnd *cmd; 3911 struct scb *scb; 3912 struct hardware_scb *hscb; 3913 struct ahd_initiator_tinfo *tinfo; 3914 struct ahd_tmode_tstate *tstate; 3915 u_int col_idx; 3916 uint16_t mask; 3917 3918 if ((dev->flags & AHD_DEV_ON_RUN_LIST) != 0) 3919 panic("running device on run list"); 3920 3921 while ((acmd = TAILQ_FIRST(&dev->busyq)) != NULL 3922 && dev->openings > 0 && dev->qfrozen == 0) { 3923 3924 /* 3925 * Schedule us to run later. The only reason we are not 3926 * running is because the whole controller Q is frozen. 3927 */ 3928 if (ahd->platform_data->qfrozen != 0 3929 && AHD_DV_SIMQ_FROZEN(ahd) == 0) { 3930 3931 TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq, 3932 dev, links); 3933 dev->flags |= AHD_DEV_ON_RUN_LIST; 3934 return; 3935 } 3936 3937 cmd = &acmd_scsi_cmd(acmd); 3938 3939 /* 3940 * Get an scb to use. 3941 */ 3942 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 3943 cmd->device->id, &tstate); 3944 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0 3945 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 3946 col_idx = AHD_NEVER_COL_IDX; 3947 } else { 3948 col_idx = AHD_BUILD_COL_IDX(cmd->device->id, 3949 cmd->device->lun); 3950 } 3951 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) { 3952 TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq, 3953 dev, links); 3954 dev->flags |= AHD_DEV_ON_RUN_LIST; 3955 ahd->flags |= AHD_RESOURCE_SHORTAGE; 3956 return; 3957 } 3958 TAILQ_REMOVE(&dev->busyq, acmd, acmd_links.tqe); 3959 scb->io_ctx = cmd; 3960 scb->platform_data->dev = dev; 3961 hscb = scb->hscb; 3962 cmd->host_scribble = (char *)scb; 3963 3964 /* 3965 * Fill out basics of the HSCB. 3966 */ 3967 hscb->control = 0; 3968 hscb->scsiid = BUILD_SCSIID(ahd, cmd); 3969 hscb->lun = cmd->device->lun; 3970 scb->hscb->task_management = 0; 3971 mask = SCB_GET_TARGET_MASK(ahd, scb); 3972 3973 if ((ahd->user_discenable & mask) != 0) 3974 hscb->control |= DISCENB; 3975 3976 if (AHD_DV_CMD(cmd) != 0) 3977 scb->flags |= SCB_SILENT; 3978 3979 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) 3980 scb->flags |= SCB_PACKETIZED; 3981 3982 if ((tstate->auto_negotiate & mask) != 0) { 3983 scb->flags |= SCB_AUTO_NEGOTIATE; 3984 scb->hscb->control |= MK_MESSAGE; 3985 } 3986 3987 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) { 3988 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) 3989 int msg_bytes; 3990 uint8_t tag_msgs[2]; 3991 3992 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); 3993 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { 3994 hscb->control |= tag_msgs[0]; 3995 if (tag_msgs[0] == MSG_ORDERED_TASK) 3996 dev->commands_since_idle_or_otag = 0; 3997 } else 3998 #endif 3999 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH 4000 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) { 4001 hscb->control |= MSG_ORDERED_TASK; 4002 dev->commands_since_idle_or_otag = 0; 4003 } else { 4004 hscb->control |= MSG_SIMPLE_TASK; 4005 } 4006 } 4007 4008 hscb->cdb_len = cmd->cmd_len; 4009 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len); 4010 4011 scb->sg_count = 0; 4012 ahd_set_residual(scb, 0); 4013 ahd_set_sense_residual(scb, 0); 4014 if (cmd->use_sg != 0) { 4015 void *sg; 4016 struct scatterlist *cur_seg; 4017 u_int nseg; 4018 int dir; 4019 4020 cur_seg = (struct scatterlist *)cmd->request_buffer; 4021 dir = scsi_to_pci_dma_dir(cmd->sc_data_direction); 4022 nseg = pci_map_sg(ahd->dev_softc, cur_seg, 4023 cmd->use_sg, dir); 4024 scb->platform_data->xfer_len = 0; 4025 for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) { 4026 dma_addr_t addr; 4027 bus_size_t len; 4028 4029 addr = sg_dma_address(cur_seg); 4030 len = sg_dma_len(cur_seg); 4031 scb->platform_data->xfer_len += len; 4032 sg = ahd_sg_setup(ahd, scb, sg, addr, len, 4033 /*last*/nseg == 1); 4034 } 4035 } else if (cmd->request_bufflen != 0) { 4036 void *sg; 4037 dma_addr_t addr; 4038 int dir; 4039 4040 sg = scb->sg_list; 4041 dir = scsi_to_pci_dma_dir(cmd->sc_data_direction); 4042 addr = pci_map_single(ahd->dev_softc, 4043 cmd->request_buffer, 4044 cmd->request_bufflen, dir); 4045 scb->platform_data->xfer_len = cmd->request_bufflen; 4046 scb->platform_data->buf_busaddr = addr; 4047 sg = ahd_sg_setup(ahd, scb, sg, addr, 4048 cmd->request_bufflen, /*last*/TRUE); 4049 } 4050 4051 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); 4052 dev->openings--; 4053 dev->active++; 4054 dev->commands_issued++; 4055 4056 /* Update the error counting bucket and dump if needed */ 4057 if (dev->target->cmds_since_error) { 4058 dev->target->cmds_since_error++; 4059 if (dev->target->cmds_since_error > 4060 AHD_LINUX_ERR_THRESH) 4061 dev->target->cmds_since_error = 0; 4062 } 4063 4064 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0) 4065 dev->commands_since_idle_or_otag++; 4066 scb->flags |= SCB_ACTIVE; 4067 ahd_queue_scb(ahd, scb); 4068 } 4069 } 4070 4071 /* 4072 * SCSI controller interrupt handler. 4073 */ 4074 irqreturn_t 4075 ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs) 4076 { 4077 struct ahd_softc *ahd; 4078 u_long flags; 4079 int ours; 4080 4081 ahd = (struct ahd_softc *) dev_id; 4082 ahd_lock(ahd, &flags); 4083 ours = ahd_intr(ahd); 4084 if (ahd_linux_next_device_to_run(ahd) != NULL) 4085 ahd_schedule_runq(ahd); 4086 ahd_linux_run_complete_queue(ahd); 4087 ahd_unlock(ahd, &flags); 4088 return IRQ_RETVAL(ours); 4089 } 4090 4091 void 4092 ahd_platform_flushwork(struct ahd_softc *ahd) 4093 { 4094 4095 while (ahd_linux_run_complete_queue(ahd) != NULL) 4096 ; 4097 } 4098 4099 static struct ahd_linux_target* 4100 ahd_linux_alloc_target(struct ahd_softc *ahd, u_int channel, u_int target) 4101 { 4102 struct ahd_linux_target *targ; 4103 4104 targ = malloc(sizeof(*targ), M_DEVBUF, M_NOWAIT); 4105 if (targ == NULL) 4106 return (NULL); 4107 memset(targ, 0, sizeof(*targ)); 4108 targ->channel = channel; 4109 targ->target = target; 4110 targ->ahd = ahd; 4111 targ->flags = AHD_DV_REQUIRED; 4112 ahd->platform_data->targets[target] = targ; 4113 return (targ); 4114 } 4115 4116 static void 4117 ahd_linux_free_target(struct ahd_softc *ahd, struct ahd_linux_target *targ) 4118 { 4119 struct ahd_devinfo devinfo; 4120 struct ahd_initiator_tinfo *tinfo; 4121 struct ahd_tmode_tstate *tstate; 4122 u_int our_id; 4123 u_int target_offset; 4124 char channel; 4125 4126 /* 4127 * Force a negotiation to async/narrow on any 4128 * future command to this device unless a bus 4129 * reset occurs between now and that command. 4130 */ 4131 channel = 'A' + targ->channel; 4132 our_id = ahd->our_id; 4133 target_offset = targ->target; 4134 tinfo = ahd_fetch_transinfo(ahd, channel, our_id, 4135 targ->target, &tstate); 4136 ahd_compile_devinfo(&devinfo, our_id, targ->target, CAM_LUN_WILDCARD, 4137 channel, ROLE_INITIATOR); 4138 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0, 4139 AHD_TRANS_GOAL, /*paused*/FALSE); 4140 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 4141 AHD_TRANS_GOAL, /*paused*/FALSE); 4142 ahd_update_neg_request(ahd, &devinfo, tstate, tinfo, AHD_NEG_ALWAYS); 4143 ahd->platform_data->targets[target_offset] = NULL; 4144 if (targ->inq_data != NULL) 4145 free(targ->inq_data, M_DEVBUF); 4146 if (targ->dv_buffer != NULL) 4147 free(targ->dv_buffer, M_DEVBUF); 4148 if (targ->dv_buffer1 != NULL) 4149 free(targ->dv_buffer1, M_DEVBUF); 4150 free(targ, M_DEVBUF); 4151 } 4152 4153 static struct ahd_linux_device* 4154 ahd_linux_alloc_device(struct ahd_softc *ahd, 4155 struct ahd_linux_target *targ, u_int lun) 4156 { 4157 struct ahd_linux_device *dev; 4158 4159 dev = malloc(sizeof(*dev), M_DEVBUG, M_NOWAIT); 4160 if (dev == NULL) 4161 return (NULL); 4162 memset(dev, 0, sizeof(*dev)); 4163 init_timer(&dev->timer); 4164 TAILQ_INIT(&dev->busyq); 4165 dev->flags = AHD_DEV_UNCONFIGURED; 4166 dev->lun = lun; 4167 dev->target = targ; 4168 4169 /* 4170 * We start out life using untagged 4171 * transactions of which we allow one. 4172 */ 4173 dev->openings = 1; 4174 4175 /* 4176 * Set maxtags to 0. This will be changed if we 4177 * later determine that we are dealing with 4178 * a tagged queuing capable device. 4179 */ 4180 dev->maxtags = 0; 4181 4182 targ->refcount++; 4183 targ->devices[lun] = dev; 4184 return (dev); 4185 } 4186 4187 static void 4188 ahd_linux_free_device(struct ahd_softc *ahd, struct ahd_linux_device *dev) 4189 { 4190 struct ahd_linux_target *targ; 4191 4192 del_timer(&dev->timer); 4193 targ = dev->target; 4194 targ->devices[dev->lun] = NULL; 4195 free(dev, M_DEVBUF); 4196 targ->refcount--; 4197 if (targ->refcount == 0 4198 && (targ->flags & AHD_DV_REQUIRED) == 0) 4199 ahd_linux_free_target(ahd, targ); 4200 } 4201 4202 void 4203 ahd_send_async(struct ahd_softc *ahd, char channel, 4204 u_int target, u_int lun, ac_code code, void *arg) 4205 { 4206 switch (code) { 4207 case AC_TRANSFER_NEG: 4208 { 4209 char buf[80]; 4210 struct ahd_linux_target *targ; 4211 struct info_str info; 4212 struct ahd_initiator_tinfo *tinfo; 4213 struct ahd_tmode_tstate *tstate; 4214 4215 info.buffer = buf; 4216 info.length = sizeof(buf); 4217 info.offset = 0; 4218 info.pos = 0; 4219 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 4220 target, &tstate); 4221 4222 /* 4223 * Don't bother reporting results while 4224 * negotiations are still pending. 4225 */ 4226 if (tinfo->curr.period != tinfo->goal.period 4227 || tinfo->curr.width != tinfo->goal.width 4228 || tinfo->curr.offset != tinfo->goal.offset 4229 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 4230 if (bootverbose == 0) 4231 break; 4232 4233 /* 4234 * Don't bother reporting results that 4235 * are identical to those last reported. 4236 */ 4237 targ = ahd->platform_data->targets[target]; 4238 if (targ == NULL) 4239 break; 4240 if (tinfo->curr.period == targ->last_tinfo.period 4241 && tinfo->curr.width == targ->last_tinfo.width 4242 && tinfo->curr.offset == targ->last_tinfo.offset 4243 && tinfo->curr.ppr_options == targ->last_tinfo.ppr_options) 4244 if (bootverbose == 0) 4245 break; 4246 4247 targ->last_tinfo.period = tinfo->curr.period; 4248 targ->last_tinfo.width = tinfo->curr.width; 4249 targ->last_tinfo.offset = tinfo->curr.offset; 4250 targ->last_tinfo.ppr_options = tinfo->curr.ppr_options; 4251 4252 printf("(%s:%c:", ahd_name(ahd), channel); 4253 if (target == CAM_TARGET_WILDCARD) 4254 printf("*): "); 4255 else 4256 printf("%d): ", target); 4257 ahd_format_transinfo(&info, &tinfo->curr); 4258 if (info.pos < info.length) 4259 *info.buffer = '\0'; 4260 else 4261 buf[info.length - 1] = '\0'; 4262 printf("%s", buf); 4263 break; 4264 } 4265 case AC_SENT_BDR: 4266 { 4267 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) 4268 WARN_ON(lun != CAM_LUN_WILDCARD); 4269 scsi_report_device_reset(ahd->platform_data->host, 4270 channel - 'A', target); 4271 #else 4272 Scsi_Device *scsi_dev; 4273 4274 /* 4275 * Find the SCSI device associated with this 4276 * request and indicate that a UA is expected. 4277 */ 4278 for (scsi_dev = ahd->platform_data->host->host_queue; 4279 scsi_dev != NULL; scsi_dev = scsi_dev->next) { 4280 if (channel - 'A' == scsi_dev->channel 4281 && target == scsi_dev->id 4282 && (lun == CAM_LUN_WILDCARD 4283 || lun == scsi_dev->lun)) { 4284 scsi_dev->was_reset = 1; 4285 scsi_dev->expecting_cc_ua = 1; 4286 } 4287 } 4288 #endif 4289 break; 4290 } 4291 case AC_BUS_RESET: 4292 if (ahd->platform_data->host != NULL) { 4293 scsi_report_bus_reset(ahd->platform_data->host, 4294 channel - 'A'); 4295 } 4296 break; 4297 default: 4298 panic("ahd_send_async: Unexpected async event"); 4299 } 4300 } 4301 4302 /* 4303 * Calls the higher level scsi done function and frees the scb. 4304 */ 4305 void 4306 ahd_done(struct ahd_softc *ahd, struct scb *scb) 4307 { 4308 Scsi_Cmnd *cmd; 4309 struct ahd_linux_device *dev; 4310 4311 if ((scb->flags & SCB_ACTIVE) == 0) { 4312 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb)); 4313 ahd_dump_card_state(ahd); 4314 panic("Stopping for safety"); 4315 } 4316 LIST_REMOVE(scb, pending_links); 4317 cmd = scb->io_ctx; 4318 dev = scb->platform_data->dev; 4319 dev->active--; 4320 dev->openings++; 4321 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 4322 cmd->result &= ~(CAM_DEV_QFRZN << 16); 4323 dev->qfrozen--; 4324 } 4325 ahd_linux_unmap_scb(ahd, scb); 4326 4327 /* 4328 * Guard against stale sense data. 4329 * The Linux mid-layer assumes that sense 4330 * was retrieved anytime the first byte of 4331 * the sense buffer looks "sane". 4332 */ 4333 cmd->sense_buffer[0] = 0; 4334 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) { 4335 uint32_t amount_xferred; 4336 4337 amount_xferred = 4338 ahd_get_transfer_length(scb) - ahd_get_residual(scb); 4339 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 4340 #ifdef AHD_DEBUG 4341 if ((ahd_debug & AHD_SHOW_MISC) != 0) { 4342 ahd_print_path(ahd, scb); 4343 printf("Set CAM_UNCOR_PARITY\n"); 4344 } 4345 #endif 4346 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY); 4347 #ifdef AHD_REPORT_UNDERFLOWS 4348 /* 4349 * This code is disabled by default as some 4350 * clients of the SCSI system do not properly 4351 * initialize the underflow parameter. This 4352 * results in spurious termination of commands 4353 * that complete as expected (e.g. underflow is 4354 * allowed as command can return variable amounts 4355 * of data. 4356 */ 4357 } else if (amount_xferred < scb->io_ctx->underflow) { 4358 u_int i; 4359 4360 ahd_print_path(ahd, scb); 4361 printf("CDB:"); 4362 for (i = 0; i < scb->io_ctx->cmd_len; i++) 4363 printf(" 0x%x", scb->io_ctx->cmnd[i]); 4364 printf("\n"); 4365 ahd_print_path(ahd, scb); 4366 printf("Saw underflow (%ld of %ld bytes). " 4367 "Treated as error\n", 4368 ahd_get_residual(scb), 4369 ahd_get_transfer_length(scb)); 4370 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR); 4371 #endif 4372 } else { 4373 ahd_set_transaction_status(scb, CAM_REQ_CMP); 4374 } 4375 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 4376 ahd_linux_handle_scsi_status(ahd, dev, scb); 4377 } else if (ahd_get_transaction_status(scb) == CAM_SEL_TIMEOUT) { 4378 dev->flags |= AHD_DEV_UNCONFIGURED; 4379 if (AHD_DV_CMD(cmd) == FALSE) 4380 dev->target->flags &= ~AHD_DV_REQUIRED; 4381 } 4382 /* 4383 * Start DV for devices that require it assuming the first command 4384 * sent does not result in a selection timeout. 4385 */ 4386 if (ahd_get_transaction_status(scb) != CAM_SEL_TIMEOUT 4387 && (dev->target->flags & AHD_DV_REQUIRED) != 0) 4388 ahd_linux_start_dv(ahd); 4389 4390 if (dev->openings == 1 4391 && ahd_get_transaction_status(scb) == CAM_REQ_CMP 4392 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 4393 dev->tag_success_count++; 4394 /* 4395 * Some devices deal with temporary internal resource 4396 * shortages by returning queue full. When the queue 4397 * full occurrs, we throttle back. Slowly try to get 4398 * back to our previous queue depth. 4399 */ 4400 if ((dev->openings + dev->active) < dev->maxtags 4401 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) { 4402 dev->tag_success_count = 0; 4403 dev->openings++; 4404 } 4405 4406 if (dev->active == 0) 4407 dev->commands_since_idle_or_otag = 0; 4408 4409 if (TAILQ_EMPTY(&dev->busyq)) { 4410 if ((dev->flags & AHD_DEV_UNCONFIGURED) != 0 4411 && dev->active == 0 4412 && (dev->flags & AHD_DEV_TIMER_ACTIVE) == 0) 4413 ahd_linux_free_device(ahd, dev); 4414 } else if ((dev->flags & AHD_DEV_ON_RUN_LIST) == 0) { 4415 TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq, dev, links); 4416 dev->flags |= AHD_DEV_ON_RUN_LIST; 4417 } 4418 4419 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 4420 printf("Recovery SCB completes\n"); 4421 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT 4422 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED) 4423 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); 4424 if ((scb->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) { 4425 scb->platform_data->flags &= ~AHD_SCB_UP_EH_SEM; 4426 up(&ahd->platform_data->eh_sem); 4427 } 4428 } 4429 4430 ahd_free_scb(ahd, scb); 4431 ahd_linux_queue_cmd_complete(ahd, cmd); 4432 4433 if ((ahd->platform_data->flags & AHD_DV_WAIT_SIMQ_EMPTY) != 0 4434 && LIST_FIRST(&ahd->pending_scbs) == NULL) { 4435 ahd->platform_data->flags &= ~AHD_DV_WAIT_SIMQ_EMPTY; 4436 up(&ahd->platform_data->dv_sem); 4437 } 4438 } 4439 4440 static void 4441 ahd_linux_handle_scsi_status(struct ahd_softc *ahd, 4442 struct ahd_linux_device *dev, struct scb *scb) 4443 { 4444 struct ahd_devinfo devinfo; 4445 4446 ahd_compile_devinfo(&devinfo, 4447 ahd->our_id, 4448 dev->target->target, dev->lun, 4449 dev->target->channel == 0 ? 'A' : 'B', 4450 ROLE_INITIATOR); 4451 4452 /* 4453 * We don't currently trust the mid-layer to 4454 * properly deal with queue full or busy. So, 4455 * when one occurs, we tell the mid-layer to 4456 * unconditionally requeue the command to us 4457 * so that we can retry it ourselves. We also 4458 * implement our own throttling mechanism so 4459 * we don't clobber the device with too many 4460 * commands. 4461 */ 4462 switch (ahd_get_scsi_status(scb)) { 4463 default: 4464 break; 4465 case SCSI_STATUS_CHECK_COND: 4466 case SCSI_STATUS_CMD_TERMINATED: 4467 { 4468 Scsi_Cmnd *cmd; 4469 4470 /* 4471 * Copy sense information to the OS's cmd 4472 * structure if it is available. 4473 */ 4474 cmd = scb->io_ctx; 4475 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) { 4476 struct scsi_status_iu_header *siu; 4477 u_int sense_size; 4478 u_int sense_offset; 4479 4480 if (scb->flags & SCB_SENSE) { 4481 sense_size = MIN(sizeof(struct scsi_sense_data) 4482 - ahd_get_sense_residual(scb), 4483 sizeof(cmd->sense_buffer)); 4484 sense_offset = 0; 4485 } else { 4486 /* 4487 * Copy only the sense data into the provided 4488 * buffer. 4489 */ 4490 siu = (struct scsi_status_iu_header *) 4491 scb->sense_data; 4492 sense_size = MIN(scsi_4btoul(siu->sense_length), 4493 sizeof(cmd->sense_buffer)); 4494 sense_offset = SIU_SENSE_OFFSET(siu); 4495 } 4496 4497 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); 4498 memcpy(cmd->sense_buffer, 4499 ahd_get_sense_buf(ahd, scb) 4500 + sense_offset, sense_size); 4501 cmd->result |= (DRIVER_SENSE << 24); 4502 4503 #ifdef AHD_DEBUG 4504 if (ahd_debug & AHD_SHOW_SENSE) { 4505 int i; 4506 4507 printf("Copied %d bytes of sense data at %d:", 4508 sense_size, sense_offset); 4509 for (i = 0; i < sense_size; i++) { 4510 if ((i & 0xF) == 0) 4511 printf("\n"); 4512 printf("0x%x ", cmd->sense_buffer[i]); 4513 } 4514 printf("\n"); 4515 } 4516 #endif 4517 } 4518 break; 4519 } 4520 case SCSI_STATUS_QUEUE_FULL: 4521 { 4522 /* 4523 * By the time the core driver has returned this 4524 * command, all other commands that were queued 4525 * to us but not the device have been returned. 4526 * This ensures that dev->active is equal to 4527 * the number of commands actually queued to 4528 * the device. 4529 */ 4530 dev->tag_success_count = 0; 4531 if (dev->active != 0) { 4532 /* 4533 * Drop our opening count to the number 4534 * of commands currently outstanding. 4535 */ 4536 dev->openings = 0; 4537 #ifdef AHD_DEBUG 4538 if ((ahd_debug & AHD_SHOW_QFULL) != 0) { 4539 ahd_print_path(ahd, scb); 4540 printf("Dropping tag count to %d\n", 4541 dev->active); 4542 } 4543 #endif 4544 if (dev->active == dev->tags_on_last_queuefull) { 4545 4546 dev->last_queuefull_same_count++; 4547 /* 4548 * If we repeatedly see a queue full 4549 * at the same queue depth, this 4550 * device has a fixed number of tag 4551 * slots. Lock in this tag depth 4552 * so we stop seeing queue fulls from 4553 * this device. 4554 */ 4555 if (dev->last_queuefull_same_count 4556 == AHD_LOCK_TAGS_COUNT) { 4557 dev->maxtags = dev->active; 4558 ahd_print_path(ahd, scb); 4559 printf("Locking max tag count at %d\n", 4560 dev->active); 4561 } 4562 } else { 4563 dev->tags_on_last_queuefull = dev->active; 4564 dev->last_queuefull_same_count = 0; 4565 } 4566 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); 4567 ahd_set_scsi_status(scb, SCSI_STATUS_OK); 4568 ahd_platform_set_tags(ahd, &devinfo, 4569 (dev->flags & AHD_DEV_Q_BASIC) 4570 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 4571 break; 4572 } 4573 /* 4574 * Drop down to a single opening, and treat this 4575 * as if the target returned BUSY SCSI status. 4576 */ 4577 dev->openings = 1; 4578 ahd_platform_set_tags(ahd, &devinfo, 4579 (dev->flags & AHD_DEV_Q_BASIC) 4580 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 4581 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY); 4582 /* FALLTHROUGH */ 4583 } 4584 case SCSI_STATUS_BUSY: 4585 /* 4586 * Set a short timer to defer sending commands for 4587 * a bit since Linux will not delay in this case. 4588 */ 4589 if ((dev->flags & AHD_DEV_TIMER_ACTIVE) != 0) { 4590 printf("%s:%c:%d: Device Timer still active during " 4591 "busy processing\n", ahd_name(ahd), 4592 dev->target->channel, dev->target->target); 4593 break; 4594 } 4595 dev->flags |= AHD_DEV_TIMER_ACTIVE; 4596 dev->qfrozen++; 4597 init_timer(&dev->timer); 4598 dev->timer.data = (u_long)dev; 4599 dev->timer.expires = jiffies + (HZ/2); 4600 dev->timer.function = ahd_linux_dev_timed_unfreeze; 4601 add_timer(&dev->timer); 4602 break; 4603 } 4604 } 4605 4606 static void 4607 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, Scsi_Cmnd *cmd) 4608 { 4609 /* 4610 * Typically, the complete queue has very few entries 4611 * queued to it before the queue is emptied by 4612 * ahd_linux_run_complete_queue, so sorting the entries 4613 * by generation number should be inexpensive. 4614 * We perform the sort so that commands that complete 4615 * with an error are retuned in the order origionally 4616 * queued to the controller so that any subsequent retries 4617 * are performed in order. The underlying ahd routines do 4618 * not guarantee the order that aborted commands will be 4619 * returned to us. 4620 */ 4621 struct ahd_completeq *completeq; 4622 struct ahd_cmd *list_cmd; 4623 struct ahd_cmd *acmd; 4624 4625 /* 4626 * Map CAM error codes into Linux Error codes. We 4627 * avoid the conversion so that the DV code has the 4628 * full error information available when making 4629 * state change decisions. 4630 */ 4631 if (AHD_DV_CMD(cmd) == FALSE) { 4632 uint32_t status; 4633 u_int new_status; 4634 4635 status = ahd_cmd_get_transaction_status(cmd); 4636 if (status != CAM_REQ_CMP) { 4637 struct ahd_linux_device *dev; 4638 struct ahd_devinfo devinfo; 4639 cam_status cam_status; 4640 uint32_t action; 4641 u_int scsi_status; 4642 4643 dev = ahd_linux_get_device(ahd, cmd->device->channel, 4644 cmd->device->id, 4645 cmd->device->lun, 4646 /*alloc*/FALSE); 4647 4648 if (dev == NULL) 4649 goto no_fallback; 4650 4651 ahd_compile_devinfo(&devinfo, 4652 ahd->our_id, 4653 dev->target->target, dev->lun, 4654 dev->target->channel == 0 ? 'A':'B', 4655 ROLE_INITIATOR); 4656 4657 scsi_status = ahd_cmd_get_scsi_status(cmd); 4658 cam_status = ahd_cmd_get_transaction_status(cmd); 4659 action = aic_error_action(cmd, dev->target->inq_data, 4660 cam_status, scsi_status); 4661 if ((action & SSQ_FALLBACK) != 0) { 4662 4663 /* Update stats */ 4664 dev->target->errors_detected++; 4665 if (dev->target->cmds_since_error == 0) 4666 dev->target->cmds_since_error++; 4667 else { 4668 dev->target->cmds_since_error = 0; 4669 ahd_linux_fallback(ahd, &devinfo); 4670 } 4671 } 4672 } 4673 no_fallback: 4674 switch (status) { 4675 case CAM_REQ_INPROG: 4676 case CAM_REQ_CMP: 4677 case CAM_SCSI_STATUS_ERROR: 4678 new_status = DID_OK; 4679 break; 4680 case CAM_REQ_ABORTED: 4681 new_status = DID_ABORT; 4682 break; 4683 case CAM_BUSY: 4684 new_status = DID_BUS_BUSY; 4685 break; 4686 case CAM_REQ_INVALID: 4687 case CAM_PATH_INVALID: 4688 new_status = DID_BAD_TARGET; 4689 break; 4690 case CAM_SEL_TIMEOUT: 4691 new_status = DID_NO_CONNECT; 4692 break; 4693 case CAM_SCSI_BUS_RESET: 4694 case CAM_BDR_SENT: 4695 new_status = DID_RESET; 4696 break; 4697 case CAM_UNCOR_PARITY: 4698 new_status = DID_PARITY; 4699 break; 4700 case CAM_CMD_TIMEOUT: 4701 new_status = DID_TIME_OUT; 4702 break; 4703 case CAM_UA_ABORT: 4704 case CAM_REQ_CMP_ERR: 4705 case CAM_AUTOSENSE_FAIL: 4706 case CAM_NO_HBA: 4707 case CAM_DATA_RUN_ERR: 4708 case CAM_UNEXP_BUSFREE: 4709 case CAM_SEQUENCE_FAIL: 4710 case CAM_CCB_LEN_ERR: 4711 case CAM_PROVIDE_FAIL: 4712 case CAM_REQ_TERMIO: 4713 case CAM_UNREC_HBA_ERROR: 4714 case CAM_REQ_TOO_BIG: 4715 new_status = DID_ERROR; 4716 break; 4717 case CAM_REQUEUE_REQ: 4718 /* 4719 * If we want the request requeued, make sure there 4720 * are sufficent retries. In the old scsi error code, 4721 * we used to be able to specify a result code that 4722 * bypassed the retry count. Now we must use this 4723 * hack. We also "fake" a check condition with 4724 * a sense code of ABORTED COMMAND. This seems to 4725 * evoke a retry even if this command is being sent 4726 * via the eh thread. Ick! Ick! Ick! 4727 */ 4728 if (cmd->retries > 0) 4729 cmd->retries--; 4730 new_status = DID_OK; 4731 ahd_cmd_set_scsi_status(cmd, SCSI_STATUS_CHECK_COND); 4732 cmd->result |= (DRIVER_SENSE << 24); 4733 memset(cmd->sense_buffer, 0, 4734 sizeof(cmd->sense_buffer)); 4735 cmd->sense_buffer[0] = SSD_ERRCODE_VALID 4736 | SSD_CURRENT_ERROR; 4737 cmd->sense_buffer[2] = SSD_KEY_ABORTED_COMMAND; 4738 break; 4739 default: 4740 /* We should never get here */ 4741 new_status = DID_ERROR; 4742 break; 4743 } 4744 4745 ahd_cmd_set_transaction_status(cmd, new_status); 4746 } 4747 4748 completeq = &ahd->platform_data->completeq; 4749 list_cmd = TAILQ_FIRST(completeq); 4750 acmd = (struct ahd_cmd *)cmd; 4751 while (list_cmd != NULL 4752 && acmd_scsi_cmd(list_cmd).serial_number 4753 < acmd_scsi_cmd(acmd).serial_number) 4754 list_cmd = TAILQ_NEXT(list_cmd, acmd_links.tqe); 4755 if (list_cmd != NULL) 4756 TAILQ_INSERT_BEFORE(list_cmd, acmd, acmd_links.tqe); 4757 else 4758 TAILQ_INSERT_TAIL(completeq, acmd, acmd_links.tqe); 4759 } 4760 4761 static void 4762 ahd_linux_filter_inquiry(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) 4763 { 4764 struct scsi_inquiry_data *sid; 4765 struct ahd_initiator_tinfo *tinfo; 4766 struct ahd_transinfo *user; 4767 struct ahd_transinfo *goal; 4768 struct ahd_transinfo *curr; 4769 struct ahd_tmode_tstate *tstate; 4770 struct ahd_linux_device *dev; 4771 u_int width; 4772 u_int period; 4773 u_int offset; 4774 u_int ppr_options; 4775 u_int trans_version; 4776 u_int prot_version; 4777 4778 /* 4779 * Determine if this lun actually exists. If so, 4780 * hold on to its corresponding device structure. 4781 * If not, make sure we release the device and 4782 * don't bother processing the rest of this inquiry 4783 * command. 4784 */ 4785 dev = ahd_linux_get_device(ahd, devinfo->channel - 'A', 4786 devinfo->target, devinfo->lun, 4787 /*alloc*/TRUE); 4788 4789 sid = (struct scsi_inquiry_data *)dev->target->inq_data; 4790 if (SID_QUAL(sid) == SID_QUAL_LU_CONNECTED) { 4791 4792 dev->flags &= ~AHD_DEV_UNCONFIGURED; 4793 } else { 4794 dev->flags |= AHD_DEV_UNCONFIGURED; 4795 return; 4796 } 4797 4798 /* 4799 * Update our notion of this device's transfer 4800 * negotiation capabilities. 4801 */ 4802 tinfo = ahd_fetch_transinfo(ahd, devinfo->channel, 4803 devinfo->our_scsiid, 4804 devinfo->target, &tstate); 4805 user = &tinfo->user; 4806 goal = &tinfo->goal; 4807 curr = &tinfo->curr; 4808 width = user->width; 4809 period = user->period; 4810 offset = user->offset; 4811 ppr_options = user->ppr_options; 4812 trans_version = user->transport_version; 4813 prot_version = MIN(user->protocol_version, SID_ANSI_REV(sid)); 4814 4815 /* 4816 * Only attempt SPI3/4 once we've verified that 4817 * the device claims to support SPI3/4 features. 4818 */ 4819 if (prot_version < SCSI_REV_2) 4820 trans_version = SID_ANSI_REV(sid); 4821 else 4822 trans_version = SCSI_REV_2; 4823 4824 if ((sid->flags & SID_WBus16) == 0) 4825 width = MSG_EXT_WDTR_BUS_8_BIT; 4826 if ((sid->flags & SID_Sync) == 0) { 4827 period = 0; 4828 offset = 0; 4829 ppr_options = 0; 4830 } 4831 if ((sid->spi3data & SID_SPI_QAS) == 0) 4832 ppr_options &= ~MSG_EXT_PPR_QAS_REQ; 4833 if ((sid->spi3data & SID_SPI_CLOCK_DT) == 0) 4834 ppr_options &= MSG_EXT_PPR_QAS_REQ; 4835 if ((sid->spi3data & SID_SPI_IUS) == 0) 4836 ppr_options &= (MSG_EXT_PPR_DT_REQ 4837 | MSG_EXT_PPR_QAS_REQ); 4838 4839 if (prot_version > SCSI_REV_2 4840 && ppr_options != 0) 4841 trans_version = user->transport_version; 4842 4843 ahd_validate_width(ahd, /*tinfo limit*/NULL, &width, ROLE_UNKNOWN); 4844 ahd_find_syncrate(ahd, &period, &ppr_options, AHD_SYNCRATE_MAX); 4845 ahd_validate_offset(ahd, /*tinfo limit*/NULL, period, 4846 &offset, width, ROLE_UNKNOWN); 4847 if (offset == 0 || period == 0) { 4848 period = 0; 4849 offset = 0; 4850 ppr_options = 0; 4851 } 4852 /* Apply our filtered user settings. */ 4853 curr->transport_version = trans_version; 4854 curr->protocol_version = prot_version; 4855 ahd_set_width(ahd, devinfo, width, AHD_TRANS_GOAL, /*paused*/FALSE); 4856 ahd_set_syncrate(ahd, devinfo, period, offset, ppr_options, 4857 AHD_TRANS_GOAL, /*paused*/FALSE); 4858 } 4859 4860 void 4861 ahd_freeze_simq(struct ahd_softc *ahd) 4862 { 4863 ahd->platform_data->qfrozen++; 4864 if (ahd->platform_data->qfrozen == 1) { 4865 scsi_block_requests(ahd->platform_data->host); 4866 ahd_platform_abort_scbs(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS, 4867 CAM_LUN_WILDCARD, SCB_LIST_NULL, 4868 ROLE_INITIATOR, CAM_REQUEUE_REQ); 4869 } 4870 } 4871 4872 void 4873 ahd_release_simq(struct ahd_softc *ahd) 4874 { 4875 u_long s; 4876 int unblock_reqs; 4877 4878 unblock_reqs = 0; 4879 ahd_lock(ahd, &s); 4880 if (ahd->platform_data->qfrozen > 0) 4881 ahd->platform_data->qfrozen--; 4882 if (ahd->platform_data->qfrozen == 0) { 4883 unblock_reqs = 1; 4884 } 4885 if (AHD_DV_SIMQ_FROZEN(ahd) 4886 && ((ahd->platform_data->flags & AHD_DV_WAIT_SIMQ_RELEASE) != 0)) { 4887 ahd->platform_data->flags &= ~AHD_DV_WAIT_SIMQ_RELEASE; 4888 up(&ahd->platform_data->dv_sem); 4889 } 4890 ahd_schedule_runq(ahd); 4891 ahd_unlock(ahd, &s); 4892 /* 4893 * There is still a race here. The mid-layer 4894 * should keep its own freeze count and use 4895 * a bottom half handler to run the queues 4896 * so we can unblock with our own lock held. 4897 */ 4898 if (unblock_reqs) 4899 scsi_unblock_requests(ahd->platform_data->host); 4900 } 4901 4902 static void 4903 ahd_linux_sem_timeout(u_long arg) 4904 { 4905 struct scb *scb; 4906 struct ahd_softc *ahd; 4907 u_long s; 4908 4909 scb = (struct scb *)arg; 4910 ahd = scb->ahd_softc; 4911 ahd_lock(ahd, &s); 4912 if ((scb->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) { 4913 scb->platform_data->flags &= ~AHD_SCB_UP_EH_SEM; 4914 up(&ahd->platform_data->eh_sem); 4915 } 4916 ahd_unlock(ahd, &s); 4917 } 4918 4919 static void 4920 ahd_linux_dev_timed_unfreeze(u_long arg) 4921 { 4922 struct ahd_linux_device *dev; 4923 struct ahd_softc *ahd; 4924 u_long s; 4925 4926 dev = (struct ahd_linux_device *)arg; 4927 ahd = dev->target->ahd; 4928 ahd_lock(ahd, &s); 4929 dev->flags &= ~AHD_DEV_TIMER_ACTIVE; 4930 if (dev->qfrozen > 0) 4931 dev->qfrozen--; 4932 if (dev->qfrozen == 0 4933 && (dev->flags & AHD_DEV_ON_RUN_LIST) == 0) 4934 ahd_linux_run_device_queue(ahd, dev); 4935 if ((dev->flags & AHD_DEV_UNCONFIGURED) != 0 4936 && dev->active == 0) 4937 ahd_linux_free_device(ahd, dev); 4938 ahd_unlock(ahd, &s); 4939 } 4940 4941 void 4942 ahd_platform_dump_card_state(struct ahd_softc *ahd) 4943 { 4944 struct ahd_linux_device *dev; 4945 int target; 4946 int maxtarget; 4947 int lun; 4948 int i; 4949 4950 maxtarget = (ahd->features & AHD_WIDE) ? 15 : 7; 4951 for (target = 0; target <=maxtarget; target++) { 4952 4953 for (lun = 0; lun < AHD_NUM_LUNS; lun++) { 4954 struct ahd_cmd *acmd; 4955 4956 dev = ahd_linux_get_device(ahd, 0, target, 4957 lun, /*alloc*/FALSE); 4958 if (dev == NULL) 4959 continue; 4960 4961 printf("DevQ(%d:%d:%d): ", 0, target, lun); 4962 i = 0; 4963 TAILQ_FOREACH(acmd, &dev->busyq, acmd_links.tqe) { 4964 if (i++ > AHD_SCB_MAX) 4965 break; 4966 } 4967 printf("%d waiting\n", i); 4968 } 4969 } 4970 } 4971 4972 static int __init 4973 ahd_linux_init(void) 4974 { 4975 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) 4976 return ahd_linux_detect(&aic79xx_driver_template); 4977 #else 4978 scsi_register_module(MODULE_SCSI_HA, &aic79xx_driver_template); 4979 if (aic79xx_driver_template.present == 0) { 4980 scsi_unregister_module(MODULE_SCSI_HA, 4981 &aic79xx_driver_template); 4982 return (-ENODEV); 4983 } 4984 4985 return (0); 4986 #endif 4987 } 4988 4989 static void __exit 4990 ahd_linux_exit(void) 4991 { 4992 struct ahd_softc *ahd; 4993 4994 /* 4995 * Shutdown DV threads before going into the SCSI mid-layer. 4996 * This avoids situations where the mid-layer locks the entire 4997 * kernel so that waiting for our DV threads to exit leads 4998 * to deadlock. 4999 */ 5000 TAILQ_FOREACH(ahd, &ahd_tailq, links) { 5001 5002 ahd_linux_kill_dv_thread(ahd); 5003 } 5004 5005 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) 5006 /* 5007 * In 2.4 we have to unregister from the PCI core _after_ 5008 * unregistering from the scsi midlayer to avoid dangling 5009 * references. 5010 */ 5011 scsi_unregister_module(MODULE_SCSI_HA, &aic79xx_driver_template); 5012 #endif 5013 ahd_linux_pci_exit(); 5014 } 5015 5016 module_init(ahd_linux_init); 5017 module_exit(ahd_linux_exit); 5018