Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 1 | /* |
| 2 | * Adaptec AIC79xx device driver for Linux. |
| 3 | * |
| 4 | * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $ |
| 5 | * |
| 6 | * -------------------------------------------------------------------------- |
| 7 | * Copyright (c) 1994-2000 Justin T. Gibbs. |
| 8 | * Copyright (c) 1997-1999 Doug Ledford |
| 9 | * Copyright (c) 2000-2003 Adaptec Inc. |
| 10 | * All rights reserved. |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or without |
| 13 | * modification, are permitted provided that the following conditions |
| 14 | * are met: |
| 15 | * 1. Redistributions of source code must retain the above copyright |
| 16 | * notice, this list of conditions, and the following disclaimer, |
| 17 | * without modification. |
| 18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 19 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 20 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 21 | * including a substantially similar Disclaimer requirement for further |
| 22 | * binary redistribution. |
| 23 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 24 | * of any contributors may be used to endorse or promote products derived |
| 25 | * from this software without specific prior written permission. |
| 26 | * |
| 27 | * Alternatively, this software may be distributed under the terms of the |
| 28 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 29 | * Software Foundation. |
| 30 | * |
| 31 | * NO WARRANTY |
| 32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 42 | * POSSIBILITY OF SUCH DAMAGES. |
| 43 | */ |
| 44 | |
| 45 | #include "aic79xx_osm.h" |
| 46 | #include "aic79xx_inline.h" |
| 47 | #include <scsi/scsicam.h> |
| 48 | |
| 49 | static struct scsi_transport_template *ahd_linux_transport_template = NULL; |
| 50 | |
| 51 | #include <linux/init.h> /* __setup */ |
| 52 | #include <linux/mm.h> /* For fetching system memory size */ |
| 53 | #include <linux/blkdev.h> /* For block_size() */ |
| 54 | #include <linux/delay.h> /* For ssleep/msleep */ |
| 55 | #include <linux/device.h> |
| 56 | #include <linux/slab.h> |
| 57 | |
| 58 | /* |
| 59 | * Bucket size for counting good commands in between bad ones. |
| 60 | */ |
| 61 | #define AHD_LINUX_ERR_THRESH 1000 |
| 62 | |
| 63 | /* |
| 64 | * Set this to the delay in seconds after SCSI bus reset. |
| 65 | * Note, we honor this only for the initial bus reset. |
| 66 | * The scsi error recovery code performs its own bus settle |
| 67 | * delay handling for error recovery actions. |
| 68 | */ |
| 69 | #ifdef CONFIG_AIC79XX_RESET_DELAY_MS |
| 70 | #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS |
| 71 | #else |
| 72 | #define AIC79XX_RESET_DELAY 5000 |
| 73 | #endif |
| 74 | |
| 75 | /* |
| 76 | * To change the default number of tagged transactions allowed per-device, |
| 77 | * add a line to the lilo.conf file like: |
| 78 | * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" |
| 79 | * which will result in the first four devices on the first two |
| 80 | * controllers being set to a tagged queue depth of 32. |
| 81 | * |
| 82 | * The tag_commands is an array of 16 to allow for wide and twin adapters. |
| 83 | * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 |
| 84 | * for channel 1. |
| 85 | */ |
| 86 | typedef struct { |
| 87 | uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */ |
| 88 | } adapter_tag_info_t; |
| 89 | |
| 90 | /* |
| 91 | * Modify this as you see fit for your system. |
| 92 | * |
| 93 | * 0 tagged queuing disabled |
| 94 | * 1 <= n <= 253 n == max tags ever dispatched. |
| 95 | * |
| 96 | * The driver will throttle the number of commands dispatched to a |
| 97 | * device if it returns queue full. For devices with a fixed maximum |
| 98 | * queue depth, the driver will eventually determine this depth and |
| 99 | * lock it in (a console message is printed to indicate that a lock |
| 100 | * has occurred). On some devices, queue full is returned for a temporary |
| 101 | * resource shortage. These devices will return queue full at varying |
| 102 | * depths. The driver will throttle back when the queue fulls occur and |
| 103 | * attempt to slowly increase the depth over time as the device recovers |
| 104 | * from the resource shortage. |
| 105 | * |
| 106 | * In this example, the first line will disable tagged queueing for all |
| 107 | * the devices on the first probed aic79xx adapter. |
| 108 | * |
| 109 | * The second line enables tagged queueing with 4 commands/LUN for IDs |
| 110 | * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the |
| 111 | * driver to attempt to use up to 64 tags for ID 1. |
| 112 | * |
| 113 | * The third line is the same as the first line. |
| 114 | * |
| 115 | * The fourth line disables tagged queueing for devices 0 and 3. It |
| 116 | * enables tagged queueing for the other IDs, with 16 commands/LUN |
| 117 | * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for |
| 118 | * IDs 2, 5-7, and 9-15. |
| 119 | */ |
| 120 | |
| 121 | /* |
| 122 | * NOTE: The below structure is for reference only, the actual structure |
| 123 | * to modify in order to change things is just below this comment block. |
| 124 | adapter_tag_info_t aic79xx_tag_info[] = |
| 125 | { |
| 126 | {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, |
| 127 | {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, |
| 128 | {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, |
| 129 | {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} |
| 130 | }; |
| 131 | */ |
| 132 | |
| 133 | #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE |
| 134 | #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE |
| 135 | #else |
| 136 | #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE |
| 137 | #endif |
| 138 | |
| 139 | #define AIC79XX_CONFIGED_TAG_COMMANDS { \ |
| 140 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ |
| 141 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ |
| 142 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ |
| 143 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ |
| 144 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ |
| 145 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ |
| 146 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ |
| 147 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \ |
| 148 | } |
| 149 | |
| 150 | /* |
| 151 | * By default, use the number of commands specified by |
| 152 | * the users kernel configuration. |
| 153 | */ |
| 154 | static adapter_tag_info_t aic79xx_tag_info[] = |
| 155 | { |
| 156 | {AIC79XX_CONFIGED_TAG_COMMANDS}, |
| 157 | {AIC79XX_CONFIGED_TAG_COMMANDS}, |
| 158 | {AIC79XX_CONFIGED_TAG_COMMANDS}, |
| 159 | {AIC79XX_CONFIGED_TAG_COMMANDS}, |
| 160 | {AIC79XX_CONFIGED_TAG_COMMANDS}, |
| 161 | {AIC79XX_CONFIGED_TAG_COMMANDS}, |
| 162 | {AIC79XX_CONFIGED_TAG_COMMANDS}, |
| 163 | {AIC79XX_CONFIGED_TAG_COMMANDS}, |
| 164 | {AIC79XX_CONFIGED_TAG_COMMANDS}, |
| 165 | {AIC79XX_CONFIGED_TAG_COMMANDS}, |
| 166 | {AIC79XX_CONFIGED_TAG_COMMANDS}, |
| 167 | {AIC79XX_CONFIGED_TAG_COMMANDS}, |
| 168 | {AIC79XX_CONFIGED_TAG_COMMANDS}, |
| 169 | {AIC79XX_CONFIGED_TAG_COMMANDS}, |
| 170 | {AIC79XX_CONFIGED_TAG_COMMANDS}, |
| 171 | {AIC79XX_CONFIGED_TAG_COMMANDS} |
| 172 | }; |
| 173 | |
| 174 | /* |
| 175 | * The I/O cell on the chip is very configurable in respect to its analog |
| 176 | * characteristics. Set the defaults here; they can be overriden with |
| 177 | * the proper insmod parameters. |
| 178 | */ |
| 179 | struct ahd_linux_iocell_opts |
| 180 | { |
| 181 | uint8_t precomp; |
| 182 | uint8_t slewrate; |
| 183 | uint8_t amplitude; |
| 184 | }; |
| 185 | #define AIC79XX_DEFAULT_PRECOMP 0xFF |
| 186 | #define AIC79XX_DEFAULT_SLEWRATE 0xFF |
| 187 | #define AIC79XX_DEFAULT_AMPLITUDE 0xFF |
| 188 | #define AIC79XX_DEFAULT_IOOPTS \ |
| 189 | { \ |
| 190 | AIC79XX_DEFAULT_PRECOMP, \ |
| 191 | AIC79XX_DEFAULT_SLEWRATE, \ |
| 192 | AIC79XX_DEFAULT_AMPLITUDE \ |
| 193 | } |
| 194 | #define AIC79XX_PRECOMP_INDEX 0 |
| 195 | #define AIC79XX_SLEWRATE_INDEX 1 |
| 196 | #define AIC79XX_AMPLITUDE_INDEX 2 |
| 197 | static const struct ahd_linux_iocell_opts aic79xx_iocell_info[] = |
| 198 | { |
| 199 | AIC79XX_DEFAULT_IOOPTS, |
| 200 | AIC79XX_DEFAULT_IOOPTS, |
| 201 | AIC79XX_DEFAULT_IOOPTS, |
| 202 | AIC79XX_DEFAULT_IOOPTS, |
| 203 | AIC79XX_DEFAULT_IOOPTS, |
| 204 | AIC79XX_DEFAULT_IOOPTS, |
| 205 | AIC79XX_DEFAULT_IOOPTS, |
| 206 | AIC79XX_DEFAULT_IOOPTS, |
| 207 | AIC79XX_DEFAULT_IOOPTS, |
| 208 | AIC79XX_DEFAULT_IOOPTS, |
| 209 | AIC79XX_DEFAULT_IOOPTS, |
| 210 | AIC79XX_DEFAULT_IOOPTS, |
| 211 | AIC79XX_DEFAULT_IOOPTS, |
| 212 | AIC79XX_DEFAULT_IOOPTS, |
| 213 | AIC79XX_DEFAULT_IOOPTS, |
| 214 | AIC79XX_DEFAULT_IOOPTS |
| 215 | }; |
| 216 | |
| 217 | /* |
| 218 | * There should be a specific return value for this in scsi.h, but |
| 219 | * it seems that most drivers ignore it. |
| 220 | */ |
| 221 | #define DID_UNDERFLOW DID_ERROR |
| 222 | |
| 223 | void |
| 224 | ahd_print_path(struct ahd_softc *ahd, struct scb *scb) |
| 225 | { |
| 226 | printk("(scsi%d:%c:%d:%d): ", |
| 227 | ahd->platform_data->host->host_no, |
| 228 | scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X', |
| 229 | scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1, |
| 230 | scb != NULL ? SCB_GET_LUN(scb) : -1); |
| 231 | } |
| 232 | |
| 233 | /* |
| 234 | * XXX - these options apply unilaterally to _all_ adapters |
| 235 | * cards in the system. This should be fixed. Exceptions to this |
| 236 | * rule are noted in the comments. |
| 237 | */ |
| 238 | |
| 239 | /* |
| 240 | * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This |
| 241 | * has no effect on any later resets that might occur due to things like |
| 242 | * SCSI bus timeouts. |
| 243 | */ |
| 244 | static uint32_t aic79xx_no_reset; |
| 245 | |
| 246 | /* |
| 247 | * Should we force EXTENDED translation on a controller. |
| 248 | * 0 == Use whatever is in the SEEPROM or default to off |
| 249 | * 1 == Use whatever is in the SEEPROM or default to on |
| 250 | */ |
| 251 | static uint32_t aic79xx_extended; |
| 252 | |
| 253 | /* |
| 254 | * PCI bus parity checking of the Adaptec controllers. This is somewhat |
| 255 | * dubious at best. To my knowledge, this option has never actually |
| 256 | * solved a PCI parity problem, but on certain machines with broken PCI |
| 257 | * chipset configurations, it can generate tons of false error messages. |
| 258 | * It's included in the driver for completeness. |
| 259 | * 0 = Shut off PCI parity check |
| 260 | * non-0 = Enable PCI parity check |
| 261 | * |
| 262 | * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this |
| 263 | * variable to -1 you would actually want to simply pass the variable |
| 264 | * name without a number. That will invert the 0 which will result in |
| 265 | * -1. |
| 266 | */ |
| 267 | static uint32_t aic79xx_pci_parity = ~0; |
| 268 | |
| 269 | /* |
| 270 | * There are lots of broken chipsets in the world. Some of them will |
| 271 | * violate the PCI spec when we issue byte sized memory writes to our |
| 272 | * controller. I/O mapped register access, if allowed by the given |
| 273 | * platform, will work in almost all cases. |
| 274 | */ |
| 275 | uint32_t aic79xx_allow_memio = ~0; |
| 276 | |
| 277 | /* |
| 278 | * So that we can set how long each device is given as a selection timeout. |
| 279 | * The table of values goes like this: |
| 280 | * 0 - 256ms |
| 281 | * 1 - 128ms |
| 282 | * 2 - 64ms |
| 283 | * 3 - 32ms |
| 284 | * We default to 256ms because some older devices need a longer time |
| 285 | * to respond to initial selection. |
| 286 | */ |
| 287 | static uint32_t aic79xx_seltime; |
| 288 | |
| 289 | /* |
| 290 | * Certain devices do not perform any aging on commands. Should the |
| 291 | * device be saturated by commands in one portion of the disk, it is |
| 292 | * possible for transactions on far away sectors to never be serviced. |
| 293 | * To handle these devices, we can periodically send an ordered tag to |
| 294 | * force all outstanding transactions to be serviced prior to a new |
| 295 | * transaction. |
| 296 | */ |
| 297 | static uint32_t aic79xx_periodic_otag; |
| 298 | |
| 299 | /* Some storage boxes are using an LSI chip which has a bug making it |
| 300 | * impossible to use aic79xx Rev B chip in 320 speeds. The following |
| 301 | * storage boxes have been reported to be buggy: |
| 302 | * EonStor 3U 16-Bay: U16U-G3A3 |
| 303 | * EonStor 2U 12-Bay: U12U-G3A3 |
| 304 | * SentinelRAID: 2500F R5 / R6 |
| 305 | * SentinelRAID: 2500F R1 |
| 306 | * SentinelRAID: 2500F/1500F |
| 307 | * SentinelRAID: 150F |
| 308 | * |
| 309 | * To get around this LSI bug, you can set your board to 160 mode |
| 310 | * or you can enable the SLOWCRC bit. |
| 311 | */ |
| 312 | uint32_t aic79xx_slowcrc; |
| 313 | |
| 314 | /* |
| 315 | * Module information and settable options. |
| 316 | */ |
| 317 | static char *aic79xx = NULL; |
| 318 | |
| 319 | MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>"); |
| 320 | MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver"); |
| 321 | MODULE_LICENSE("Dual BSD/GPL"); |
| 322 | MODULE_VERSION(AIC79XX_DRIVER_VERSION); |
| 323 | module_param(aic79xx, charp, 0444); |
| 324 | MODULE_PARM_DESC(aic79xx, |
| 325 | "period-delimited options string:\n" |
| 326 | " verbose Enable verbose/diagnostic logging\n" |
| 327 | " allow_memio Allow device registers to be memory mapped\n" |
| 328 | " debug Bitmask of debug values to enable\n" |
| 329 | " no_reset Suppress initial bus resets\n" |
| 330 | " extended Enable extended geometry on all controllers\n" |
| 331 | " periodic_otag Send an ordered tagged transaction\n" |
| 332 | " periodically to prevent tag starvation.\n" |
| 333 | " This may be required by some older disk\n" |
| 334 | " or drives/RAID arrays.\n" |
| 335 | " tag_info:<tag_str> Set per-target tag depth\n" |
| 336 | " global_tag_depth:<int> Global tag depth for all targets on all buses\n" |
| 337 | " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n" |
| 338 | " precomp:<pcomp_list> Set the signal precompensation (0-7).\n" |
| 339 | " amplitude:<int> Set the signal amplitude (0-7).\n" |
| 340 | " seltime:<int> Selection Timeout:\n" |
| 341 | " (0/256ms,1/128ms,2/64ms,3/32ms)\n" |
| 342 | " slowcrc Turn on the SLOWCRC bit (Rev B only)\n" |
| 343 | "\n" |
| 344 | " Sample modprobe configuration file:\n" |
| 345 | " # Enable verbose logging\n" |
| 346 | " # Set tag depth on Controller 2/Target 2 to 10 tags\n" |
| 347 | " # Shorten the selection timeout to 128ms\n" |
| 348 | "\n" |
| 349 | " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n" |
| 350 | ); |
| 351 | |
| 352 | static void ahd_linux_handle_scsi_status(struct ahd_softc *, |
| 353 | struct scsi_device *, |
| 354 | struct scb *); |
| 355 | static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, |
| 356 | struct scsi_cmnd *cmd); |
| 357 | static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd); |
| 358 | static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd); |
| 359 | static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd, |
| 360 | struct ahd_devinfo *devinfo); |
| 361 | static void ahd_linux_device_queue_depth(struct scsi_device *); |
| 362 | static int ahd_linux_run_command(struct ahd_softc*, |
| 363 | struct ahd_linux_device *, |
| 364 | struct scsi_cmnd *); |
| 365 | static void ahd_linux_setup_tag_info_global(char *p); |
| 366 | static int aic79xx_setup(char *c); |
| 367 | static void ahd_freeze_simq(struct ahd_softc *ahd); |
| 368 | static void ahd_release_simq(struct ahd_softc *ahd); |
| 369 | |
| 370 | static int ahd_linux_unit; |
| 371 | |
| 372 | |
| 373 | /************************** OS Utility Wrappers *******************************/ |
| 374 | void ahd_delay(long); |
| 375 | void |
| 376 | ahd_delay(long usec) |
| 377 | { |
| 378 | /* |
| 379 | * udelay on Linux can have problems for |
| 380 | * multi-millisecond waits. Wait at most |
| 381 | * 1024us per call. |
| 382 | */ |
| 383 | while (usec > 0) { |
| 384 | udelay(usec % 1024); |
| 385 | usec -= 1024; |
| 386 | } |
| 387 | } |
| 388 | |
| 389 | |
| 390 | /***************************** Low Level I/O **********************************/ |
| 391 | uint8_t ahd_inb(struct ahd_softc * ahd, long port); |
| 392 | void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val); |
| 393 | void ahd_outw_atomic(struct ahd_softc * ahd, |
| 394 | long port, uint16_t val); |
| 395 | void ahd_outsb(struct ahd_softc * ahd, long port, |
| 396 | uint8_t *, int count); |
| 397 | void ahd_insb(struct ahd_softc * ahd, long port, |
| 398 | uint8_t *, int count); |
| 399 | |
| 400 | uint8_t |
| 401 | ahd_inb(struct ahd_softc * ahd, long port) |
| 402 | { |
| 403 | uint8_t x; |
| 404 | |
| 405 | if (ahd->tags[0] == BUS_SPACE_MEMIO) { |
| 406 | x = readb(ahd->bshs[0].maddr + port); |
| 407 | } else { |
| 408 | x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF)); |
| 409 | } |
| 410 | mb(); |
| 411 | return (x); |
| 412 | } |
| 413 | |
| 414 | #if 0 /* unused */ |
| 415 | static uint16_t |
| 416 | ahd_inw_atomic(struct ahd_softc * ahd, long port) |
| 417 | { |
| 418 | uint8_t x; |
| 419 | |
| 420 | if (ahd->tags[0] == BUS_SPACE_MEMIO) { |
| 421 | x = readw(ahd->bshs[0].maddr + port); |
| 422 | } else { |
| 423 | x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF)); |
| 424 | } |
| 425 | mb(); |
| 426 | return (x); |
| 427 | } |
| 428 | #endif |
| 429 | |
| 430 | void |
| 431 | ahd_outb(struct ahd_softc * ahd, long port, uint8_t val) |
| 432 | { |
| 433 | if (ahd->tags[0] == BUS_SPACE_MEMIO) { |
| 434 | writeb(val, ahd->bshs[0].maddr + port); |
| 435 | } else { |
| 436 | outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF)); |
| 437 | } |
| 438 | mb(); |
| 439 | } |
| 440 | |
| 441 | void |
| 442 | ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val) |
| 443 | { |
| 444 | if (ahd->tags[0] == BUS_SPACE_MEMIO) { |
| 445 | writew(val, ahd->bshs[0].maddr + port); |
| 446 | } else { |
| 447 | outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF)); |
| 448 | } |
| 449 | mb(); |
| 450 | } |
| 451 | |
| 452 | void |
| 453 | ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count) |
| 454 | { |
| 455 | int i; |
| 456 | |
| 457 | /* |
| 458 | * There is probably a more efficient way to do this on Linux |
| 459 | * but we don't use this for anything speed critical and this |
| 460 | * should work. |
| 461 | */ |
| 462 | for (i = 0; i < count; i++) |
| 463 | ahd_outb(ahd, port, *array++); |
| 464 | } |
| 465 | |
| 466 | void |
| 467 | ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count) |
| 468 | { |
| 469 | int i; |
| 470 | |
| 471 | /* |
| 472 | * There is probably a more efficient way to do this on Linux |
| 473 | * but we don't use this for anything speed critical and this |
| 474 | * should work. |
| 475 | */ |
| 476 | for (i = 0; i < count; i++) |
| 477 | *array++ = ahd_inb(ahd, port); |
| 478 | } |
| 479 | |
| 480 | /******************************* PCI Routines *********************************/ |
| 481 | uint32_t |
| 482 | ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width) |
| 483 | { |
| 484 | switch (width) { |
| 485 | case 1: |
| 486 | { |
| 487 | uint8_t retval; |
| 488 | |
| 489 | pci_read_config_byte(pci, reg, &retval); |
| 490 | return (retval); |
| 491 | } |
| 492 | case 2: |
| 493 | { |
| 494 | uint16_t retval; |
| 495 | pci_read_config_word(pci, reg, &retval); |
| 496 | return (retval); |
| 497 | } |
| 498 | case 4: |
| 499 | { |
| 500 | uint32_t retval; |
| 501 | pci_read_config_dword(pci, reg, &retval); |
| 502 | return (retval); |
| 503 | } |
| 504 | default: |
| 505 | panic("ahd_pci_read_config: Read size too big"); |
| 506 | /* NOTREACHED */ |
| 507 | return (0); |
| 508 | } |
| 509 | } |
| 510 | |
| 511 | void |
| 512 | ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width) |
| 513 | { |
| 514 | switch (width) { |
| 515 | case 1: |
| 516 | pci_write_config_byte(pci, reg, value); |
| 517 | break; |
| 518 | case 2: |
| 519 | pci_write_config_word(pci, reg, value); |
| 520 | break; |
| 521 | case 4: |
| 522 | pci_write_config_dword(pci, reg, value); |
| 523 | break; |
| 524 | default: |
| 525 | panic("ahd_pci_write_config: Write size too big"); |
| 526 | /* NOTREACHED */ |
| 527 | } |
| 528 | } |
| 529 | |
| 530 | /****************************** Inlines ***************************************/ |
| 531 | static void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*); |
| 532 | |
| 533 | static void |
| 534 | ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb) |
| 535 | { |
| 536 | struct scsi_cmnd *cmd; |
| 537 | |
| 538 | cmd = scb->io_ctx; |
| 539 | ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE); |
| 540 | scsi_dma_unmap(cmd); |
| 541 | } |
| 542 | |
| 543 | /******************************** Macros **************************************/ |
| 544 | #define BUILD_SCSIID(ahd, cmd) \ |
| 545 | (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id) |
| 546 | |
| 547 | /* |
| 548 | * Return a string describing the driver. |
| 549 | */ |
| 550 | static const char * |
| 551 | ahd_linux_info(struct Scsi_Host *host) |
| 552 | { |
| 553 | static char buffer[512]; |
| 554 | char ahd_info[256]; |
| 555 | char *bp; |
| 556 | struct ahd_softc *ahd; |
| 557 | |
| 558 | bp = &buffer[0]; |
| 559 | ahd = *(struct ahd_softc **)host->hostdata; |
| 560 | memset(bp, 0, sizeof(buffer)); |
| 561 | strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev " AIC79XX_DRIVER_VERSION "\n" |
| 562 | " <"); |
| 563 | strcat(bp, ahd->description); |
| 564 | strcat(bp, ">\n" |
| 565 | " "); |
| 566 | ahd_controller_info(ahd, ahd_info); |
| 567 | strcat(bp, ahd_info); |
| 568 | |
| 569 | return (bp); |
| 570 | } |
| 571 | |
| 572 | /* |
| 573 | * Queue an SCB to the controller. |
| 574 | */ |
| 575 | static int |
| 576 | ahd_linux_queue_lck(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *)) |
| 577 | { |
| 578 | struct ahd_softc *ahd; |
| 579 | struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device); |
| 580 | int rtn = SCSI_MLQUEUE_HOST_BUSY; |
| 581 | |
| 582 | ahd = *(struct ahd_softc **)cmd->device->host->hostdata; |
| 583 | |
| 584 | cmd->scsi_done = scsi_done; |
| 585 | cmd->result = CAM_REQ_INPROG << 16; |
| 586 | rtn = ahd_linux_run_command(ahd, dev, cmd); |
| 587 | |
| 588 | return rtn; |
| 589 | } |
| 590 | |
| 591 | static DEF_SCSI_QCMD(ahd_linux_queue) |
| 592 | |
| 593 | static struct scsi_target ** |
| 594 | ahd_linux_target_in_softc(struct scsi_target *starget) |
| 595 | { |
| 596 | struct ahd_softc *ahd = |
| 597 | *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); |
| 598 | unsigned int target_offset; |
| 599 | |
| 600 | target_offset = starget->id; |
| 601 | if (starget->channel != 0) |
| 602 | target_offset += 8; |
| 603 | |
| 604 | return &ahd->platform_data->starget[target_offset]; |
| 605 | } |
| 606 | |
| 607 | static int |
| 608 | ahd_linux_target_alloc(struct scsi_target *starget) |
| 609 | { |
| 610 | struct ahd_softc *ahd = |
| 611 | *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); |
| 612 | struct seeprom_config *sc = ahd->seep_config; |
| 613 | unsigned long flags; |
| 614 | struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); |
| 615 | struct ahd_devinfo devinfo; |
| 616 | struct ahd_initiator_tinfo *tinfo; |
| 617 | struct ahd_tmode_tstate *tstate; |
| 618 | char channel = starget->channel + 'A'; |
| 619 | |
| 620 | ahd_lock(ahd, &flags); |
| 621 | |
| 622 | BUG_ON(*ahd_targp != NULL); |
| 623 | |
| 624 | *ahd_targp = starget; |
| 625 | |
| 626 | if (sc) { |
| 627 | int flags = sc->device_flags[starget->id]; |
| 628 | |
| 629 | tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, |
| 630 | starget->id, &tstate); |
| 631 | |
| 632 | if ((flags & CFPACKETIZED) == 0) { |
| 633 | /* don't negotiate packetized (IU) transfers */ |
| 634 | spi_max_iu(starget) = 0; |
| 635 | } else { |
| 636 | if ((ahd->features & AHD_RTI) == 0) |
| 637 | spi_rti(starget) = 0; |
| 638 | } |
| 639 | |
| 640 | if ((flags & CFQAS) == 0) |
| 641 | spi_max_qas(starget) = 0; |
| 642 | |
| 643 | /* Transinfo values have been set to BIOS settings */ |
| 644 | spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; |
| 645 | spi_min_period(starget) = tinfo->user.period; |
| 646 | spi_max_offset(starget) = tinfo->user.offset; |
| 647 | } |
| 648 | |
| 649 | tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, |
| 650 | starget->id, &tstate); |
| 651 | ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id, |
| 652 | CAM_LUN_WILDCARD, channel, |
| 653 | ROLE_INITIATOR); |
| 654 | ahd_set_syncrate(ahd, &devinfo, 0, 0, 0, |
| 655 | AHD_TRANS_GOAL, /*paused*/FALSE); |
| 656 | ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, |
| 657 | AHD_TRANS_GOAL, /*paused*/FALSE); |
| 658 | ahd_unlock(ahd, &flags); |
| 659 | |
| 660 | return 0; |
| 661 | } |
| 662 | |
| 663 | static void |
| 664 | ahd_linux_target_destroy(struct scsi_target *starget) |
| 665 | { |
| 666 | struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); |
| 667 | |
| 668 | *ahd_targp = NULL; |
| 669 | } |
| 670 | |
| 671 | static int |
| 672 | ahd_linux_slave_alloc(struct scsi_device *sdev) |
| 673 | { |
| 674 | struct ahd_softc *ahd = |
| 675 | *((struct ahd_softc **)sdev->host->hostdata); |
| 676 | struct ahd_linux_device *dev; |
| 677 | |
| 678 | if (bootverbose) |
| 679 | printk("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id); |
| 680 | |
| 681 | dev = scsi_transport_device_data(sdev); |
| 682 | memset(dev, 0, sizeof(*dev)); |
| 683 | |
| 684 | /* |
| 685 | * We start out life using untagged |
| 686 | * transactions of which we allow one. |
| 687 | */ |
| 688 | dev->openings = 1; |
| 689 | |
| 690 | /* |
| 691 | * Set maxtags to 0. This will be changed if we |
| 692 | * later determine that we are dealing with |
| 693 | * a tagged queuing capable device. |
| 694 | */ |
| 695 | dev->maxtags = 0; |
| 696 | |
| 697 | return (0); |
| 698 | } |
| 699 | |
| 700 | static int |
| 701 | ahd_linux_slave_configure(struct scsi_device *sdev) |
| 702 | { |
| 703 | struct ahd_softc *ahd; |
| 704 | |
| 705 | ahd = *((struct ahd_softc **)sdev->host->hostdata); |
| 706 | if (bootverbose) |
| 707 | sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); |
| 708 | |
| 709 | ahd_linux_device_queue_depth(sdev); |
| 710 | |
| 711 | /* Initial Domain Validation */ |
| 712 | if (!spi_initial_dv(sdev->sdev_target)) |
| 713 | spi_dv_device(sdev); |
| 714 | |
| 715 | return 0; |
| 716 | } |
| 717 | |
| 718 | #if defined(__i386__) |
| 719 | /* |
| 720 | * Return the disk geometry for the given SCSI device. |
| 721 | */ |
| 722 | static int |
| 723 | ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, |
| 724 | sector_t capacity, int geom[]) |
| 725 | { |
| 726 | uint8_t *bh; |
| 727 | int heads; |
| 728 | int sectors; |
| 729 | int cylinders; |
| 730 | int ret; |
| 731 | int extended; |
| 732 | struct ahd_softc *ahd; |
| 733 | |
| 734 | ahd = *((struct ahd_softc **)sdev->host->hostdata); |
| 735 | |
| 736 | bh = scsi_bios_ptable(bdev); |
| 737 | if (bh) { |
| 738 | ret = scsi_partsize(bh, capacity, |
| 739 | &geom[2], &geom[0], &geom[1]); |
| 740 | kfree(bh); |
| 741 | if (ret != -1) |
| 742 | return (ret); |
| 743 | } |
| 744 | heads = 64; |
| 745 | sectors = 32; |
| 746 | cylinders = aic_sector_div(capacity, heads, sectors); |
| 747 | |
| 748 | if (aic79xx_extended != 0) |
| 749 | extended = 1; |
| 750 | else |
| 751 | extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0; |
| 752 | if (extended && cylinders >= 1024) { |
| 753 | heads = 255; |
| 754 | sectors = 63; |
| 755 | cylinders = aic_sector_div(capacity, heads, sectors); |
| 756 | } |
| 757 | geom[0] = heads; |
| 758 | geom[1] = sectors; |
| 759 | geom[2] = cylinders; |
| 760 | return (0); |
| 761 | } |
| 762 | #endif |
| 763 | |
| 764 | /* |
| 765 | * Abort the current SCSI command(s). |
| 766 | */ |
| 767 | static int |
| 768 | ahd_linux_abort(struct scsi_cmnd *cmd) |
| 769 | { |
| 770 | int error; |
| 771 | |
| 772 | error = ahd_linux_queue_abort_cmd(cmd); |
| 773 | |
| 774 | return error; |
| 775 | } |
| 776 | |
| 777 | /* |
| 778 | * Attempt to send a target reset message to the device that timed out. |
| 779 | */ |
| 780 | static int |
| 781 | ahd_linux_dev_reset(struct scsi_cmnd *cmd) |
| 782 | { |
| 783 | struct ahd_softc *ahd; |
| 784 | struct ahd_linux_device *dev; |
| 785 | struct scb *reset_scb; |
| 786 | u_int cdb_byte; |
| 787 | int retval = SUCCESS; |
| 788 | int paused; |
| 789 | int wait; |
| 790 | struct ahd_initiator_tinfo *tinfo; |
| 791 | struct ahd_tmode_tstate *tstate; |
| 792 | unsigned long flags; |
| 793 | DECLARE_COMPLETION_ONSTACK(done); |
| 794 | |
| 795 | reset_scb = NULL; |
| 796 | paused = FALSE; |
| 797 | wait = FALSE; |
| 798 | ahd = *(struct ahd_softc **)cmd->device->host->hostdata; |
| 799 | |
| 800 | scmd_printk(KERN_INFO, cmd, |
| 801 | "Attempting to queue a TARGET RESET message:"); |
| 802 | |
| 803 | printk("CDB:"); |
| 804 | for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) |
| 805 | printk(" 0x%x", cmd->cmnd[cdb_byte]); |
| 806 | printk("\n"); |
| 807 | |
| 808 | /* |
| 809 | * Determine if we currently own this command. |
| 810 | */ |
| 811 | dev = scsi_transport_device_data(cmd->device); |
| 812 | |
| 813 | if (dev == NULL) { |
| 814 | /* |
| 815 | * No target device for this command exists, |
| 816 | * so we must not still own the command. |
| 817 | */ |
| 818 | scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); |
| 819 | return SUCCESS; |
| 820 | } |
| 821 | |
| 822 | /* |
| 823 | * Generate us a new SCB |
| 824 | */ |
| 825 | reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX); |
| 826 | if (!reset_scb) { |
| 827 | scmd_printk(KERN_INFO, cmd, "No SCB available\n"); |
| 828 | return FAILED; |
| 829 | } |
| 830 | |
| 831 | tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, |
| 832 | cmd->device->id, &tstate); |
| 833 | reset_scb->io_ctx = cmd; |
| 834 | reset_scb->platform_data->dev = dev; |
| 835 | reset_scb->sg_count = 0; |
| 836 | ahd_set_residual(reset_scb, 0); |
| 837 | ahd_set_sense_residual(reset_scb, 0); |
| 838 | reset_scb->platform_data->xfer_len = 0; |
| 839 | reset_scb->hscb->control = 0; |
| 840 | reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd); |
| 841 | reset_scb->hscb->lun = cmd->device->lun; |
| 842 | reset_scb->hscb->cdb_len = 0; |
| 843 | reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET; |
| 844 | reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE; |
| 845 | if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { |
| 846 | reset_scb->flags |= SCB_PACKETIZED; |
| 847 | } else { |
| 848 | reset_scb->hscb->control |= MK_MESSAGE; |
| 849 | } |
| 850 | dev->openings--; |
| 851 | dev->active++; |
| 852 | dev->commands_issued++; |
| 853 | |
| 854 | ahd_lock(ahd, &flags); |
| 855 | |
| 856 | LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links); |
| 857 | ahd_queue_scb(ahd, reset_scb); |
| 858 | |
| 859 | ahd->platform_data->eh_done = &done; |
| 860 | ahd_unlock(ahd, &flags); |
| 861 | |
| 862 | printk("%s: Device reset code sleeping\n", ahd_name(ahd)); |
| 863 | if (!wait_for_completion_timeout(&done, 5 * HZ)) { |
| 864 | ahd_lock(ahd, &flags); |
| 865 | ahd->platform_data->eh_done = NULL; |
| 866 | ahd_unlock(ahd, &flags); |
| 867 | printk("%s: Device reset timer expired (active %d)\n", |
| 868 | ahd_name(ahd), dev->active); |
| 869 | retval = FAILED; |
| 870 | } |
| 871 | printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval); |
| 872 | |
| 873 | return (retval); |
| 874 | } |
| 875 | |
| 876 | /* |
| 877 | * Reset the SCSI bus. |
| 878 | */ |
| 879 | static int |
| 880 | ahd_linux_bus_reset(struct scsi_cmnd *cmd) |
| 881 | { |
| 882 | struct ahd_softc *ahd; |
| 883 | int found; |
| 884 | unsigned long flags; |
| 885 | |
| 886 | ahd = *(struct ahd_softc **)cmd->device->host->hostdata; |
| 887 | #ifdef AHD_DEBUG |
| 888 | if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) |
| 889 | printk("%s: Bus reset called for cmd %p\n", |
| 890 | ahd_name(ahd), cmd); |
| 891 | #endif |
| 892 | ahd_lock(ahd, &flags); |
| 893 | |
| 894 | found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A', |
| 895 | /*initiate reset*/TRUE); |
| 896 | ahd_unlock(ahd, &flags); |
| 897 | |
| 898 | if (bootverbose) |
| 899 | printk("%s: SCSI bus reset delivered. " |
| 900 | "%d SCBs aborted.\n", ahd_name(ahd), found); |
| 901 | |
| 902 | return (SUCCESS); |
| 903 | } |
| 904 | |
| 905 | struct scsi_host_template aic79xx_driver_template = { |
| 906 | .module = THIS_MODULE, |
| 907 | .name = "aic79xx", |
| 908 | .proc_name = "aic79xx", |
| 909 | .show_info = ahd_linux_show_info, |
| 910 | .write_info = ahd_proc_write_seeprom, |
| 911 | .info = ahd_linux_info, |
| 912 | .queuecommand = ahd_linux_queue, |
| 913 | .eh_abort_handler = ahd_linux_abort, |
| 914 | .eh_device_reset_handler = ahd_linux_dev_reset, |
| 915 | .eh_bus_reset_handler = ahd_linux_bus_reset, |
| 916 | #if defined(__i386__) |
| 917 | .bios_param = ahd_linux_biosparam, |
| 918 | #endif |
| 919 | .can_queue = AHD_MAX_QUEUE, |
| 920 | .this_id = -1, |
| 921 | .max_sectors = 8192, |
| 922 | .cmd_per_lun = 2, |
| 923 | .use_clustering = ENABLE_CLUSTERING, |
| 924 | .slave_alloc = ahd_linux_slave_alloc, |
| 925 | .slave_configure = ahd_linux_slave_configure, |
| 926 | .target_alloc = ahd_linux_target_alloc, |
| 927 | .target_destroy = ahd_linux_target_destroy, |
| 928 | }; |
| 929 | |
| 930 | /******************************** Bus DMA *************************************/ |
| 931 | int |
| 932 | ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent, |
| 933 | bus_size_t alignment, bus_size_t boundary, |
| 934 | dma_addr_t lowaddr, dma_addr_t highaddr, |
| 935 | bus_dma_filter_t *filter, void *filterarg, |
| 936 | bus_size_t maxsize, int nsegments, |
| 937 | bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) |
| 938 | { |
| 939 | bus_dma_tag_t dmat; |
| 940 | |
| 941 | dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC); |
| 942 | if (dmat == NULL) |
| 943 | return (ENOMEM); |
| 944 | |
| 945 | /* |
| 946 | * Linux is very simplistic about DMA memory. For now don't |
| 947 | * maintain all specification information. Once Linux supplies |
| 948 | * better facilities for doing these operations, or the |
| 949 | * needs of this particular driver change, we might need to do |
| 950 | * more here. |
| 951 | */ |
| 952 | dmat->alignment = alignment; |
| 953 | dmat->boundary = boundary; |
| 954 | dmat->maxsize = maxsize; |
| 955 | *ret_tag = dmat; |
| 956 | return (0); |
| 957 | } |
| 958 | |
| 959 | void |
| 960 | ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat) |
| 961 | { |
| 962 | kfree(dmat); |
| 963 | } |
| 964 | |
| 965 | int |
| 966 | ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr, |
| 967 | int flags, bus_dmamap_t *mapp) |
| 968 | { |
| 969 | *vaddr = pci_alloc_consistent(ahd->dev_softc, |
| 970 | dmat->maxsize, mapp); |
| 971 | if (*vaddr == NULL) |
| 972 | return (ENOMEM); |
| 973 | return(0); |
| 974 | } |
| 975 | |
| 976 | void |
| 977 | ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat, |
| 978 | void* vaddr, bus_dmamap_t map) |
| 979 | { |
| 980 | pci_free_consistent(ahd->dev_softc, dmat->maxsize, |
| 981 | vaddr, map); |
| 982 | } |
| 983 | |
| 984 | int |
| 985 | ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map, |
| 986 | void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, |
| 987 | void *cb_arg, int flags) |
| 988 | { |
| 989 | /* |
| 990 | * Assume for now that this will only be used during |
| 991 | * initialization and not for per-transaction buffer mapping. |
| 992 | */ |
| 993 | bus_dma_segment_t stack_sg; |
| 994 | |
| 995 | stack_sg.ds_addr = map; |
| 996 | stack_sg.ds_len = dmat->maxsize; |
| 997 | cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); |
| 998 | return (0); |
| 999 | } |
| 1000 | |
| 1001 | void |
| 1002 | ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) |
| 1003 | { |
| 1004 | } |
| 1005 | |
| 1006 | int |
| 1007 | ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) |
| 1008 | { |
| 1009 | /* Nothing to do */ |
| 1010 | return (0); |
| 1011 | } |
| 1012 | |
| 1013 | /********************* Platform Dependent Functions ***************************/ |
| 1014 | static void |
| 1015 | ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value) |
| 1016 | { |
| 1017 | |
| 1018 | if ((instance >= 0) |
| 1019 | && (instance < ARRAY_SIZE(aic79xx_iocell_info))) { |
| 1020 | uint8_t *iocell_info; |
| 1021 | |
| 1022 | iocell_info = (uint8_t*)&aic79xx_iocell_info[instance]; |
| 1023 | iocell_info[index] = value & 0xFFFF; |
| 1024 | if (bootverbose) |
| 1025 | printk("iocell[%d:%ld] = %d\n", instance, index, value); |
| 1026 | } |
| 1027 | } |
| 1028 | |
| 1029 | static void |
| 1030 | ahd_linux_setup_tag_info_global(char *p) |
| 1031 | { |
| 1032 | int tags, i, j; |
| 1033 | |
| 1034 | tags = simple_strtoul(p + 1, NULL, 0) & 0xff; |
| 1035 | printk("Setting Global Tags= %d\n", tags); |
| 1036 | |
| 1037 | for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) { |
| 1038 | for (j = 0; j < AHD_NUM_TARGETS; j++) { |
| 1039 | aic79xx_tag_info[i].tag_commands[j] = tags; |
| 1040 | } |
| 1041 | } |
| 1042 | } |
| 1043 | |
| 1044 | static void |
| 1045 | ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) |
| 1046 | { |
| 1047 | |
| 1048 | if ((instance >= 0) && (targ >= 0) |
| 1049 | && (instance < ARRAY_SIZE(aic79xx_tag_info)) |
| 1050 | && (targ < AHD_NUM_TARGETS)) { |
| 1051 | aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF; |
| 1052 | if (bootverbose) |
| 1053 | printk("tag_info[%d:%d] = %d\n", instance, targ, value); |
| 1054 | } |
| 1055 | } |
| 1056 | |
| 1057 | static char * |
| 1058 | ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, |
| 1059 | void (*callback)(u_long, int, int, int32_t), |
| 1060 | u_long callback_arg) |
| 1061 | { |
| 1062 | char *tok_end; |
| 1063 | char *tok_end2; |
| 1064 | int i; |
| 1065 | int instance; |
| 1066 | int targ; |
| 1067 | int done; |
| 1068 | char tok_list[] = {'.', ',', '{', '}', '\0'}; |
| 1069 | |
| 1070 | /* All options use a ':' name/arg separator */ |
| 1071 | if (*opt_arg != ':') |
| 1072 | return (opt_arg); |
| 1073 | opt_arg++; |
| 1074 | instance = -1; |
| 1075 | targ = -1; |
| 1076 | done = FALSE; |
| 1077 | /* |
| 1078 | * Restore separator that may be in |
| 1079 | * the middle of our option argument. |
| 1080 | */ |
| 1081 | tok_end = strchr(opt_arg, '\0'); |
| 1082 | if (tok_end < end) |
| 1083 | *tok_end = ','; |
| 1084 | while (!done) { |
| 1085 | switch (*opt_arg) { |
| 1086 | case '{': |
| 1087 | if (instance == -1) { |
| 1088 | instance = 0; |
| 1089 | } else { |
| 1090 | if (depth > 1) { |
| 1091 | if (targ == -1) |
| 1092 | targ = 0; |
| 1093 | } else { |
| 1094 | printk("Malformed Option %s\n", |
| 1095 | opt_name); |
| 1096 | done = TRUE; |
| 1097 | } |
| 1098 | } |
| 1099 | opt_arg++; |
| 1100 | break; |
| 1101 | case '}': |
| 1102 | if (targ != -1) |
| 1103 | targ = -1; |
| 1104 | else if (instance != -1) |
| 1105 | instance = -1; |
| 1106 | opt_arg++; |
| 1107 | break; |
| 1108 | case ',': |
| 1109 | case '.': |
| 1110 | if (instance == -1) |
| 1111 | done = TRUE; |
| 1112 | else if (targ >= 0) |
| 1113 | targ++; |
| 1114 | else if (instance >= 0) |
| 1115 | instance++; |
| 1116 | opt_arg++; |
| 1117 | break; |
| 1118 | case '\0': |
| 1119 | done = TRUE; |
| 1120 | break; |
| 1121 | default: |
| 1122 | tok_end = end; |
| 1123 | for (i = 0; tok_list[i]; i++) { |
| 1124 | tok_end2 = strchr(opt_arg, tok_list[i]); |
| 1125 | if ((tok_end2) && (tok_end2 < tok_end)) |
| 1126 | tok_end = tok_end2; |
| 1127 | } |
| 1128 | callback(callback_arg, instance, targ, |
| 1129 | simple_strtol(opt_arg, NULL, 0)); |
| 1130 | opt_arg = tok_end; |
| 1131 | break; |
| 1132 | } |
| 1133 | } |
| 1134 | return (opt_arg); |
| 1135 | } |
| 1136 | |
| 1137 | /* |
| 1138 | * Handle Linux boot parameters. This routine allows for assigning a value |
| 1139 | * to a parameter with a ':' between the parameter and the value. |
| 1140 | * ie. aic79xx=stpwlev:1,extended |
| 1141 | */ |
| 1142 | static int |
| 1143 | aic79xx_setup(char *s) |
| 1144 | { |
| 1145 | int i, n; |
| 1146 | char *p; |
| 1147 | char *end; |
| 1148 | |
| 1149 | static const struct { |
| 1150 | const char *name; |
| 1151 | uint32_t *flag; |
| 1152 | } options[] = { |
| 1153 | { "extended", &aic79xx_extended }, |
| 1154 | { "no_reset", &aic79xx_no_reset }, |
| 1155 | { "verbose", &aic79xx_verbose }, |
| 1156 | { "allow_memio", &aic79xx_allow_memio}, |
| 1157 | #ifdef AHD_DEBUG |
| 1158 | { "debug", &ahd_debug }, |
| 1159 | #endif |
| 1160 | { "periodic_otag", &aic79xx_periodic_otag }, |
| 1161 | { "pci_parity", &aic79xx_pci_parity }, |
| 1162 | { "seltime", &aic79xx_seltime }, |
| 1163 | { "tag_info", NULL }, |
| 1164 | { "global_tag_depth", NULL}, |
| 1165 | { "slewrate", NULL }, |
| 1166 | { "precomp", NULL }, |
| 1167 | { "amplitude", NULL }, |
| 1168 | { "slowcrc", &aic79xx_slowcrc }, |
| 1169 | }; |
| 1170 | |
| 1171 | end = strchr(s, '\0'); |
| 1172 | |
| 1173 | /* |
| 1174 | * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE |
| 1175 | * will never be 0 in this case. |
| 1176 | */ |
| 1177 | n = 0; |
| 1178 | |
| 1179 | while ((p = strsep(&s, ",.")) != NULL) { |
| 1180 | if (*p == '\0') |
| 1181 | continue; |
| 1182 | for (i = 0; i < ARRAY_SIZE(options); i++) { |
| 1183 | |
| 1184 | n = strlen(options[i].name); |
| 1185 | if (strncmp(options[i].name, p, n) == 0) |
| 1186 | break; |
| 1187 | } |
| 1188 | if (i == ARRAY_SIZE(options)) |
| 1189 | continue; |
| 1190 | |
| 1191 | if (strncmp(p, "global_tag_depth", n) == 0) { |
| 1192 | ahd_linux_setup_tag_info_global(p + n); |
| 1193 | } else if (strncmp(p, "tag_info", n) == 0) { |
| 1194 | s = ahd_parse_brace_option("tag_info", p + n, end, |
| 1195 | 2, ahd_linux_setup_tag_info, 0); |
| 1196 | } else if (strncmp(p, "slewrate", n) == 0) { |
| 1197 | s = ahd_parse_brace_option("slewrate", |
| 1198 | p + n, end, 1, ahd_linux_setup_iocell_info, |
| 1199 | AIC79XX_SLEWRATE_INDEX); |
| 1200 | } else if (strncmp(p, "precomp", n) == 0) { |
| 1201 | s = ahd_parse_brace_option("precomp", |
| 1202 | p + n, end, 1, ahd_linux_setup_iocell_info, |
| 1203 | AIC79XX_PRECOMP_INDEX); |
| 1204 | } else if (strncmp(p, "amplitude", n) == 0) { |
| 1205 | s = ahd_parse_brace_option("amplitude", |
| 1206 | p + n, end, 1, ahd_linux_setup_iocell_info, |
| 1207 | AIC79XX_AMPLITUDE_INDEX); |
| 1208 | } else if (p[n] == ':') { |
| 1209 | *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); |
| 1210 | } else if (!strncmp(p, "verbose", n)) { |
| 1211 | *(options[i].flag) = 1; |
| 1212 | } else { |
| 1213 | *(options[i].flag) ^= 0xFFFFFFFF; |
| 1214 | } |
| 1215 | } |
| 1216 | return 1; |
| 1217 | } |
| 1218 | |
| 1219 | __setup("aic79xx=", aic79xx_setup); |
| 1220 | |
| 1221 | uint32_t aic79xx_verbose; |
| 1222 | |
| 1223 | int |
| 1224 | ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template) |
| 1225 | { |
| 1226 | char buf[80]; |
| 1227 | struct Scsi_Host *host; |
| 1228 | char *new_name; |
| 1229 | u_long s; |
| 1230 | int retval; |
| 1231 | |
| 1232 | template->name = ahd->description; |
| 1233 | host = scsi_host_alloc(template, sizeof(struct ahd_softc *)); |
| 1234 | if (host == NULL) |
| 1235 | return (ENOMEM); |
| 1236 | |
| 1237 | *((struct ahd_softc **)host->hostdata) = ahd; |
| 1238 | ahd->platform_data->host = host; |
| 1239 | host->can_queue = AHD_MAX_QUEUE; |
| 1240 | host->cmd_per_lun = 2; |
| 1241 | host->sg_tablesize = AHD_NSEG; |
| 1242 | host->this_id = ahd->our_id; |
| 1243 | host->irq = ahd->platform_data->irq; |
| 1244 | host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8; |
| 1245 | host->max_lun = AHD_NUM_LUNS; |
| 1246 | host->max_channel = 0; |
| 1247 | host->sg_tablesize = AHD_NSEG; |
| 1248 | ahd_lock(ahd, &s); |
| 1249 | ahd_set_unit(ahd, ahd_linux_unit++); |
| 1250 | ahd_unlock(ahd, &s); |
| 1251 | sprintf(buf, "scsi%d", host->host_no); |
| 1252 | new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC); |
| 1253 | if (new_name != NULL) { |
| 1254 | strcpy(new_name, buf); |
| 1255 | ahd_set_name(ahd, new_name); |
| 1256 | } |
| 1257 | host->unique_id = ahd->unit; |
| 1258 | ahd_linux_initialize_scsi_bus(ahd); |
| 1259 | ahd_intr_enable(ahd, TRUE); |
| 1260 | |
| 1261 | host->transportt = ahd_linux_transport_template; |
| 1262 | |
| 1263 | retval = scsi_add_host(host, &ahd->dev_softc->dev); |
| 1264 | if (retval) { |
| 1265 | printk(KERN_WARNING "aic79xx: scsi_add_host failed\n"); |
| 1266 | scsi_host_put(host); |
| 1267 | return retval; |
| 1268 | } |
| 1269 | |
| 1270 | scsi_scan_host(host); |
| 1271 | return 0; |
| 1272 | } |
| 1273 | |
| 1274 | /* |
| 1275 | * Place the SCSI bus into a known state by either resetting it, |
| 1276 | * or forcing transfer negotiations on the next command to any |
| 1277 | * target. |
| 1278 | */ |
| 1279 | static void |
| 1280 | ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd) |
| 1281 | { |
| 1282 | u_int target_id; |
| 1283 | u_int numtarg; |
| 1284 | unsigned long s; |
| 1285 | |
| 1286 | target_id = 0; |
| 1287 | numtarg = 0; |
| 1288 | |
| 1289 | if (aic79xx_no_reset != 0) |
| 1290 | ahd->flags &= ~AHD_RESET_BUS_A; |
| 1291 | |
| 1292 | if ((ahd->flags & AHD_RESET_BUS_A) != 0) |
| 1293 | ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE); |
| 1294 | else |
| 1295 | numtarg = (ahd->features & AHD_WIDE) ? 16 : 8; |
| 1296 | |
| 1297 | ahd_lock(ahd, &s); |
| 1298 | |
| 1299 | /* |
| 1300 | * Force negotiation to async for all targets that |
| 1301 | * will not see an initial bus reset. |
| 1302 | */ |
| 1303 | for (; target_id < numtarg; target_id++) { |
| 1304 | struct ahd_devinfo devinfo; |
| 1305 | struct ahd_initiator_tinfo *tinfo; |
| 1306 | struct ahd_tmode_tstate *tstate; |
| 1307 | |
| 1308 | tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, |
| 1309 | target_id, &tstate); |
| 1310 | ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, |
| 1311 | CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); |
| 1312 | ahd_update_neg_request(ahd, &devinfo, tstate, |
| 1313 | tinfo, AHD_NEG_ALWAYS); |
| 1314 | } |
| 1315 | ahd_unlock(ahd, &s); |
| 1316 | /* Give the bus some time to recover */ |
| 1317 | if ((ahd->flags & AHD_RESET_BUS_A) != 0) { |
| 1318 | ahd_freeze_simq(ahd); |
| 1319 | msleep(AIC79XX_RESET_DELAY); |
| 1320 | ahd_release_simq(ahd); |
| 1321 | } |
| 1322 | } |
| 1323 | |
| 1324 | int |
| 1325 | ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg) |
| 1326 | { |
| 1327 | ahd->platform_data = |
| 1328 | kzalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC); |
| 1329 | if (ahd->platform_data == NULL) |
| 1330 | return (ENOMEM); |
| 1331 | ahd->platform_data->irq = AHD_LINUX_NOIRQ; |
| 1332 | ahd_lockinit(ahd); |
| 1333 | ahd->seltime = (aic79xx_seltime & 0x3) << 4; |
| 1334 | return (0); |
| 1335 | } |
| 1336 | |
| 1337 | void |
| 1338 | ahd_platform_free(struct ahd_softc *ahd) |
| 1339 | { |
| 1340 | struct scsi_target *starget; |
| 1341 | int i; |
| 1342 | |
| 1343 | if (ahd->platform_data != NULL) { |
| 1344 | /* destroy all of the device and target objects */ |
| 1345 | for (i = 0; i < AHD_NUM_TARGETS; i++) { |
| 1346 | starget = ahd->platform_data->starget[i]; |
| 1347 | if (starget != NULL) { |
| 1348 | ahd->platform_data->starget[i] = NULL; |
| 1349 | } |
| 1350 | } |
| 1351 | |
| 1352 | if (ahd->platform_data->irq != AHD_LINUX_NOIRQ) |
| 1353 | free_irq(ahd->platform_data->irq, ahd); |
| 1354 | if (ahd->tags[0] == BUS_SPACE_PIO |
| 1355 | && ahd->bshs[0].ioport != 0) |
| 1356 | release_region(ahd->bshs[0].ioport, 256); |
| 1357 | if (ahd->tags[1] == BUS_SPACE_PIO |
| 1358 | && ahd->bshs[1].ioport != 0) |
| 1359 | release_region(ahd->bshs[1].ioport, 256); |
| 1360 | if (ahd->tags[0] == BUS_SPACE_MEMIO |
| 1361 | && ahd->bshs[0].maddr != NULL) { |
| 1362 | iounmap(ahd->bshs[0].maddr); |
| 1363 | release_mem_region(ahd->platform_data->mem_busaddr, |
| 1364 | 0x1000); |
| 1365 | } |
| 1366 | if (ahd->platform_data->host) |
| 1367 | scsi_host_put(ahd->platform_data->host); |
| 1368 | |
| 1369 | kfree(ahd->platform_data); |
| 1370 | } |
| 1371 | } |
| 1372 | |
| 1373 | void |
| 1374 | ahd_platform_init(struct ahd_softc *ahd) |
| 1375 | { |
| 1376 | /* |
| 1377 | * Lookup and commit any modified IO Cell options. |
| 1378 | */ |
| 1379 | if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { |
| 1380 | const struct ahd_linux_iocell_opts *iocell_opts; |
| 1381 | |
| 1382 | iocell_opts = &aic79xx_iocell_info[ahd->unit]; |
| 1383 | if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP) |
| 1384 | AHD_SET_PRECOMP(ahd, iocell_opts->precomp); |
| 1385 | if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE) |
| 1386 | AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate); |
| 1387 | if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE) |
| 1388 | AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude); |
| 1389 | } |
| 1390 | |
| 1391 | } |
| 1392 | |
| 1393 | void |
| 1394 | ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb) |
| 1395 | { |
| 1396 | ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), |
| 1397 | SCB_GET_CHANNEL(ahd, scb), |
| 1398 | SCB_GET_LUN(scb), SCB_LIST_NULL, |
| 1399 | ROLE_UNKNOWN, CAM_REQUEUE_REQ); |
| 1400 | } |
| 1401 | |
| 1402 | void |
| 1403 | ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev, |
| 1404 | struct ahd_devinfo *devinfo, ahd_queue_alg alg) |
| 1405 | { |
| 1406 | struct ahd_linux_device *dev; |
| 1407 | int was_queuing; |
| 1408 | int now_queuing; |
| 1409 | |
| 1410 | if (sdev == NULL) |
| 1411 | return; |
| 1412 | |
| 1413 | dev = scsi_transport_device_data(sdev); |
| 1414 | |
| 1415 | if (dev == NULL) |
| 1416 | return; |
| 1417 | was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED); |
| 1418 | switch (alg) { |
| 1419 | default: |
| 1420 | case AHD_QUEUE_NONE: |
| 1421 | now_queuing = 0; |
| 1422 | break; |
| 1423 | case AHD_QUEUE_BASIC: |
| 1424 | now_queuing = AHD_DEV_Q_BASIC; |
| 1425 | break; |
| 1426 | case AHD_QUEUE_TAGGED: |
| 1427 | now_queuing = AHD_DEV_Q_TAGGED; |
| 1428 | break; |
| 1429 | } |
| 1430 | if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0 |
| 1431 | && (was_queuing != now_queuing) |
| 1432 | && (dev->active != 0)) { |
| 1433 | dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY; |
| 1434 | dev->qfrozen++; |
| 1435 | } |
| 1436 | |
| 1437 | dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG); |
| 1438 | if (now_queuing) { |
| 1439 | u_int usertags; |
| 1440 | |
| 1441 | usertags = ahd_linux_user_tagdepth(ahd, devinfo); |
| 1442 | if (!was_queuing) { |
| 1443 | /* |
| 1444 | * Start out aggressively and allow our |
| 1445 | * dynamic queue depth algorithm to take |
| 1446 | * care of the rest. |
| 1447 | */ |
| 1448 | dev->maxtags = usertags; |
| 1449 | dev->openings = dev->maxtags - dev->active; |
| 1450 | } |
| 1451 | if (dev->maxtags == 0) { |
| 1452 | /* |
| 1453 | * Queueing is disabled by the user. |
| 1454 | */ |
| 1455 | dev->openings = 1; |
| 1456 | } else if (alg == AHD_QUEUE_TAGGED) { |
| 1457 | dev->flags |= AHD_DEV_Q_TAGGED; |
| 1458 | if (aic79xx_periodic_otag != 0) |
| 1459 | dev->flags |= AHD_DEV_PERIODIC_OTAG; |
| 1460 | } else |
| 1461 | dev->flags |= AHD_DEV_Q_BASIC; |
| 1462 | } else { |
| 1463 | /* We can only have one opening. */ |
| 1464 | dev->maxtags = 0; |
| 1465 | dev->openings = 1 - dev->active; |
| 1466 | } |
| 1467 | |
| 1468 | switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) { |
| 1469 | case AHD_DEV_Q_BASIC: |
| 1470 | case AHD_DEV_Q_TAGGED: |
| 1471 | scsi_change_queue_depth(sdev, |
| 1472 | dev->openings + dev->active); |
| 1473 | break; |
| 1474 | default: |
| 1475 | /* |
| 1476 | * We allow the OS to queue 2 untagged transactions to |
| 1477 | * us at any time even though we can only execute them |
| 1478 | * serially on the controller/device. This should |
| 1479 | * remove some latency. |
| 1480 | */ |
| 1481 | scsi_change_queue_depth(sdev, 1); |
| 1482 | break; |
| 1483 | } |
| 1484 | } |
| 1485 | |
| 1486 | int |
| 1487 | ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel, |
| 1488 | int lun, u_int tag, role_t role, uint32_t status) |
| 1489 | { |
| 1490 | return 0; |
| 1491 | } |
| 1492 | |
| 1493 | static u_int |
| 1494 | ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) |
| 1495 | { |
| 1496 | static int warned_user; |
| 1497 | u_int tags; |
| 1498 | |
| 1499 | tags = 0; |
| 1500 | if ((ahd->user_discenable & devinfo->target_mask) != 0) { |
| 1501 | if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) { |
| 1502 | |
| 1503 | if (warned_user == 0) { |
| 1504 | printk(KERN_WARNING |
| 1505 | "aic79xx: WARNING: Insufficient tag_info instances\n" |
| 1506 | "aic79xx: for installed controllers. Using defaults\n" |
| 1507 | "aic79xx: Please update the aic79xx_tag_info array in\n" |
| 1508 | "aic79xx: the aic79xx_osm.c source file.\n"); |
| 1509 | warned_user++; |
| 1510 | } |
| 1511 | tags = AHD_MAX_QUEUE; |
| 1512 | } else { |
| 1513 | adapter_tag_info_t *tag_info; |
| 1514 | |
| 1515 | tag_info = &aic79xx_tag_info[ahd->unit]; |
| 1516 | tags = tag_info->tag_commands[devinfo->target_offset]; |
| 1517 | if (tags > AHD_MAX_QUEUE) |
| 1518 | tags = AHD_MAX_QUEUE; |
| 1519 | } |
| 1520 | } |
| 1521 | return (tags); |
| 1522 | } |
| 1523 | |
| 1524 | /* |
| 1525 | * Determines the queue depth for a given device. |
| 1526 | */ |
| 1527 | static void |
| 1528 | ahd_linux_device_queue_depth(struct scsi_device *sdev) |
| 1529 | { |
| 1530 | struct ahd_devinfo devinfo; |
| 1531 | u_int tags; |
| 1532 | struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata); |
| 1533 | |
| 1534 | ahd_compile_devinfo(&devinfo, |
| 1535 | ahd->our_id, |
| 1536 | sdev->sdev_target->id, sdev->lun, |
| 1537 | sdev->sdev_target->channel == 0 ? 'A' : 'B', |
| 1538 | ROLE_INITIATOR); |
| 1539 | tags = ahd_linux_user_tagdepth(ahd, &devinfo); |
| 1540 | if (tags != 0 && sdev->tagged_supported != 0) { |
| 1541 | |
| 1542 | ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED); |
| 1543 | ahd_send_async(ahd, devinfo.channel, devinfo.target, |
| 1544 | devinfo.lun, AC_TRANSFER_NEG); |
| 1545 | ahd_print_devinfo(ahd, &devinfo); |
| 1546 | printk("Tagged Queuing enabled. Depth %d\n", tags); |
| 1547 | } else { |
| 1548 | ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE); |
| 1549 | ahd_send_async(ahd, devinfo.channel, devinfo.target, |
| 1550 | devinfo.lun, AC_TRANSFER_NEG); |
| 1551 | } |
| 1552 | } |
| 1553 | |
| 1554 | static int |
| 1555 | ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev, |
| 1556 | struct scsi_cmnd *cmd) |
| 1557 | { |
| 1558 | struct scb *scb; |
| 1559 | struct hardware_scb *hscb; |
| 1560 | struct ahd_initiator_tinfo *tinfo; |
| 1561 | struct ahd_tmode_tstate *tstate; |
| 1562 | u_int col_idx; |
| 1563 | uint16_t mask; |
| 1564 | unsigned long flags; |
| 1565 | int nseg; |
| 1566 | |
| 1567 | nseg = scsi_dma_map(cmd); |
| 1568 | if (nseg < 0) |
| 1569 | return SCSI_MLQUEUE_HOST_BUSY; |
| 1570 | |
| 1571 | ahd_lock(ahd, &flags); |
| 1572 | |
| 1573 | /* |
| 1574 | * Get an scb to use. |
| 1575 | */ |
| 1576 | tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, |
| 1577 | cmd->device->id, &tstate); |
| 1578 | if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0 |
| 1579 | || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { |
| 1580 | col_idx = AHD_NEVER_COL_IDX; |
| 1581 | } else { |
| 1582 | col_idx = AHD_BUILD_COL_IDX(cmd->device->id, |
| 1583 | cmd->device->lun); |
| 1584 | } |
| 1585 | if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) { |
| 1586 | ahd->flags |= AHD_RESOURCE_SHORTAGE; |
| 1587 | ahd_unlock(ahd, &flags); |
| 1588 | scsi_dma_unmap(cmd); |
| 1589 | return SCSI_MLQUEUE_HOST_BUSY; |
| 1590 | } |
| 1591 | |
| 1592 | scb->io_ctx = cmd; |
| 1593 | scb->platform_data->dev = dev; |
| 1594 | hscb = scb->hscb; |
| 1595 | cmd->host_scribble = (char *)scb; |
| 1596 | |
| 1597 | /* |
| 1598 | * Fill out basics of the HSCB. |
| 1599 | */ |
| 1600 | hscb->control = 0; |
| 1601 | hscb->scsiid = BUILD_SCSIID(ahd, cmd); |
| 1602 | hscb->lun = cmd->device->lun; |
| 1603 | scb->hscb->task_management = 0; |
| 1604 | mask = SCB_GET_TARGET_MASK(ahd, scb); |
| 1605 | |
| 1606 | if ((ahd->user_discenable & mask) != 0) |
| 1607 | hscb->control |= DISCENB; |
| 1608 | |
| 1609 | if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) |
| 1610 | scb->flags |= SCB_PACKETIZED; |
| 1611 | |
| 1612 | if ((tstate->auto_negotiate & mask) != 0) { |
| 1613 | scb->flags |= SCB_AUTO_NEGOTIATE; |
| 1614 | scb->hscb->control |= MK_MESSAGE; |
| 1615 | } |
| 1616 | |
| 1617 | if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) { |
| 1618 | if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH |
| 1619 | && (dev->flags & AHD_DEV_Q_TAGGED) != 0) { |
| 1620 | hscb->control |= MSG_ORDERED_TASK; |
| 1621 | dev->commands_since_idle_or_otag = 0; |
| 1622 | } else { |
| 1623 | hscb->control |= MSG_SIMPLE_TASK; |
| 1624 | } |
| 1625 | } |
| 1626 | |
| 1627 | hscb->cdb_len = cmd->cmd_len; |
| 1628 | memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len); |
| 1629 | |
| 1630 | scb->platform_data->xfer_len = 0; |
| 1631 | ahd_set_residual(scb, 0); |
| 1632 | ahd_set_sense_residual(scb, 0); |
| 1633 | scb->sg_count = 0; |
| 1634 | |
| 1635 | if (nseg > 0) { |
| 1636 | void *sg = scb->sg_list; |
| 1637 | struct scatterlist *cur_seg; |
| 1638 | int i; |
| 1639 | |
| 1640 | scb->platform_data->xfer_len = 0; |
| 1641 | |
| 1642 | scsi_for_each_sg(cmd, cur_seg, nseg, i) { |
| 1643 | dma_addr_t addr; |
| 1644 | bus_size_t len; |
| 1645 | |
| 1646 | addr = sg_dma_address(cur_seg); |
| 1647 | len = sg_dma_len(cur_seg); |
| 1648 | scb->platform_data->xfer_len += len; |
| 1649 | sg = ahd_sg_setup(ahd, scb, sg, addr, len, |
| 1650 | i == (nseg - 1)); |
| 1651 | } |
| 1652 | } |
| 1653 | |
| 1654 | LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); |
| 1655 | dev->openings--; |
| 1656 | dev->active++; |
| 1657 | dev->commands_issued++; |
| 1658 | |
| 1659 | if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0) |
| 1660 | dev->commands_since_idle_or_otag++; |
| 1661 | scb->flags |= SCB_ACTIVE; |
| 1662 | ahd_queue_scb(ahd, scb); |
| 1663 | |
| 1664 | ahd_unlock(ahd, &flags); |
| 1665 | |
| 1666 | return 0; |
| 1667 | } |
| 1668 | |
| 1669 | /* |
| 1670 | * SCSI controller interrupt handler. |
| 1671 | */ |
| 1672 | irqreturn_t |
| 1673 | ahd_linux_isr(int irq, void *dev_id) |
| 1674 | { |
| 1675 | struct ahd_softc *ahd; |
| 1676 | u_long flags; |
| 1677 | int ours; |
| 1678 | |
| 1679 | ahd = (struct ahd_softc *) dev_id; |
| 1680 | ahd_lock(ahd, &flags); |
| 1681 | ours = ahd_intr(ahd); |
| 1682 | ahd_unlock(ahd, &flags); |
| 1683 | return IRQ_RETVAL(ours); |
| 1684 | } |
| 1685 | |
| 1686 | void |
| 1687 | ahd_send_async(struct ahd_softc *ahd, char channel, |
| 1688 | u_int target, u_int lun, ac_code code) |
| 1689 | { |
| 1690 | switch (code) { |
| 1691 | case AC_TRANSFER_NEG: |
| 1692 | { |
| 1693 | struct scsi_target *starget; |
| 1694 | struct ahd_initiator_tinfo *tinfo; |
| 1695 | struct ahd_tmode_tstate *tstate; |
| 1696 | unsigned int target_ppr_options; |
| 1697 | |
| 1698 | BUG_ON(target == CAM_TARGET_WILDCARD); |
| 1699 | |
| 1700 | tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, |
| 1701 | target, &tstate); |
| 1702 | |
| 1703 | /* |
| 1704 | * Don't bother reporting results while |
| 1705 | * negotiations are still pending. |
| 1706 | */ |
| 1707 | if (tinfo->curr.period != tinfo->goal.period |
| 1708 | || tinfo->curr.width != tinfo->goal.width |
| 1709 | || tinfo->curr.offset != tinfo->goal.offset |
| 1710 | || tinfo->curr.ppr_options != tinfo->goal.ppr_options) |
| 1711 | if (bootverbose == 0) |
| 1712 | break; |
| 1713 | |
| 1714 | /* |
| 1715 | * Don't bother reporting results that |
| 1716 | * are identical to those last reported. |
| 1717 | */ |
| 1718 | starget = ahd->platform_data->starget[target]; |
| 1719 | if (starget == NULL) |
| 1720 | break; |
| 1721 | |
| 1722 | target_ppr_options = |
| 1723 | (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) |
| 1724 | + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) |
| 1725 | + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0) |
| 1726 | + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0) |
| 1727 | + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0) |
| 1728 | + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0) |
| 1729 | + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0) |
| 1730 | + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0); |
| 1731 | |
| 1732 | if (tinfo->curr.period == spi_period(starget) |
| 1733 | && tinfo->curr.width == spi_width(starget) |
| 1734 | && tinfo->curr.offset == spi_offset(starget) |
| 1735 | && tinfo->curr.ppr_options == target_ppr_options) |
| 1736 | if (bootverbose == 0) |
| 1737 | break; |
| 1738 | |
| 1739 | spi_period(starget) = tinfo->curr.period; |
| 1740 | spi_width(starget) = tinfo->curr.width; |
| 1741 | spi_offset(starget) = tinfo->curr.offset; |
| 1742 | spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; |
| 1743 | spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; |
| 1744 | spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; |
| 1745 | spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0; |
| 1746 | spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0; |
| 1747 | spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0; |
| 1748 | spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0; |
| 1749 | spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0; |
| 1750 | spi_display_xfer_agreement(starget); |
| 1751 | break; |
| 1752 | } |
| 1753 | case AC_SENT_BDR: |
| 1754 | { |
| 1755 | WARN_ON(lun != CAM_LUN_WILDCARD); |
| 1756 | scsi_report_device_reset(ahd->platform_data->host, |
| 1757 | channel - 'A', target); |
| 1758 | break; |
| 1759 | } |
| 1760 | case AC_BUS_RESET: |
| 1761 | if (ahd->platform_data->host != NULL) { |
| 1762 | scsi_report_bus_reset(ahd->platform_data->host, |
| 1763 | channel - 'A'); |
| 1764 | } |
| 1765 | break; |
| 1766 | default: |
| 1767 | panic("ahd_send_async: Unexpected async event"); |
| 1768 | } |
| 1769 | } |
| 1770 | |
| 1771 | /* |
| 1772 | * Calls the higher level scsi done function and frees the scb. |
| 1773 | */ |
| 1774 | void |
| 1775 | ahd_done(struct ahd_softc *ahd, struct scb *scb) |
| 1776 | { |
| 1777 | struct scsi_cmnd *cmd; |
| 1778 | struct ahd_linux_device *dev; |
| 1779 | |
| 1780 | if ((scb->flags & SCB_ACTIVE) == 0) { |
| 1781 | printk("SCB %d done'd twice\n", SCB_GET_TAG(scb)); |
| 1782 | ahd_dump_card_state(ahd); |
| 1783 | panic("Stopping for safety"); |
| 1784 | } |
| 1785 | LIST_REMOVE(scb, pending_links); |
| 1786 | cmd = scb->io_ctx; |
| 1787 | dev = scb->platform_data->dev; |
| 1788 | dev->active--; |
| 1789 | dev->openings++; |
| 1790 | if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { |
| 1791 | cmd->result &= ~(CAM_DEV_QFRZN << 16); |
| 1792 | dev->qfrozen--; |
| 1793 | } |
| 1794 | ahd_linux_unmap_scb(ahd, scb); |
| 1795 | |
| 1796 | /* |
| 1797 | * Guard against stale sense data. |
| 1798 | * The Linux mid-layer assumes that sense |
| 1799 | * was retrieved anytime the first byte of |
| 1800 | * the sense buffer looks "sane". |
| 1801 | */ |
| 1802 | cmd->sense_buffer[0] = 0; |
| 1803 | if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) { |
| 1804 | uint32_t amount_xferred; |
| 1805 | |
| 1806 | amount_xferred = |
| 1807 | ahd_get_transfer_length(scb) - ahd_get_residual(scb); |
| 1808 | if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { |
| 1809 | #ifdef AHD_DEBUG |
| 1810 | if ((ahd_debug & AHD_SHOW_MISC) != 0) { |
| 1811 | ahd_print_path(ahd, scb); |
| 1812 | printk("Set CAM_UNCOR_PARITY\n"); |
| 1813 | } |
| 1814 | #endif |
| 1815 | ahd_set_transaction_status(scb, CAM_UNCOR_PARITY); |
| 1816 | #ifdef AHD_REPORT_UNDERFLOWS |
| 1817 | /* |
| 1818 | * This code is disabled by default as some |
| 1819 | * clients of the SCSI system do not properly |
| 1820 | * initialize the underflow parameter. This |
| 1821 | * results in spurious termination of commands |
| 1822 | * that complete as expected (e.g. underflow is |
| 1823 | * allowed as command can return variable amounts |
| 1824 | * of data. |
| 1825 | */ |
| 1826 | } else if (amount_xferred < scb->io_ctx->underflow) { |
| 1827 | u_int i; |
| 1828 | |
| 1829 | ahd_print_path(ahd, scb); |
| 1830 | printk("CDB:"); |
| 1831 | for (i = 0; i < scb->io_ctx->cmd_len; i++) |
| 1832 | printk(" 0x%x", scb->io_ctx->cmnd[i]); |
| 1833 | printk("\n"); |
| 1834 | ahd_print_path(ahd, scb); |
| 1835 | printk("Saw underflow (%ld of %ld bytes). " |
| 1836 | "Treated as error\n", |
| 1837 | ahd_get_residual(scb), |
| 1838 | ahd_get_transfer_length(scb)); |
| 1839 | ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR); |
| 1840 | #endif |
| 1841 | } else { |
| 1842 | ahd_set_transaction_status(scb, CAM_REQ_CMP); |
| 1843 | } |
| 1844 | } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { |
| 1845 | ahd_linux_handle_scsi_status(ahd, cmd->device, scb); |
| 1846 | } |
| 1847 | |
| 1848 | if (dev->openings == 1 |
| 1849 | && ahd_get_transaction_status(scb) == CAM_REQ_CMP |
| 1850 | && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) |
| 1851 | dev->tag_success_count++; |
| 1852 | /* |
| 1853 | * Some devices deal with temporary internal resource |
| 1854 | * shortages by returning queue full. When the queue |
| 1855 | * full occurrs, we throttle back. Slowly try to get |
| 1856 | * back to our previous queue depth. |
| 1857 | */ |
| 1858 | if ((dev->openings + dev->active) < dev->maxtags |
| 1859 | && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) { |
| 1860 | dev->tag_success_count = 0; |
| 1861 | dev->openings++; |
| 1862 | } |
| 1863 | |
| 1864 | if (dev->active == 0) |
| 1865 | dev->commands_since_idle_or_otag = 0; |
| 1866 | |
| 1867 | if ((scb->flags & SCB_RECOVERY_SCB) != 0) { |
| 1868 | printk("Recovery SCB completes\n"); |
| 1869 | if (ahd_get_transaction_status(scb) == CAM_BDR_SENT |
| 1870 | || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED) |
| 1871 | ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); |
| 1872 | |
| 1873 | if (ahd->platform_data->eh_done) |
| 1874 | complete(ahd->platform_data->eh_done); |
| 1875 | } |
| 1876 | |
| 1877 | ahd_free_scb(ahd, scb); |
| 1878 | ahd_linux_queue_cmd_complete(ahd, cmd); |
| 1879 | } |
| 1880 | |
| 1881 | static void |
| 1882 | ahd_linux_handle_scsi_status(struct ahd_softc *ahd, |
| 1883 | struct scsi_device *sdev, struct scb *scb) |
| 1884 | { |
| 1885 | struct ahd_devinfo devinfo; |
| 1886 | struct ahd_linux_device *dev = scsi_transport_device_data(sdev); |
| 1887 | |
| 1888 | ahd_compile_devinfo(&devinfo, |
| 1889 | ahd->our_id, |
| 1890 | sdev->sdev_target->id, sdev->lun, |
| 1891 | sdev->sdev_target->channel == 0 ? 'A' : 'B', |
| 1892 | ROLE_INITIATOR); |
| 1893 | |
| 1894 | /* |
| 1895 | * We don't currently trust the mid-layer to |
| 1896 | * properly deal with queue full or busy. So, |
| 1897 | * when one occurs, we tell the mid-layer to |
| 1898 | * unconditionally requeue the command to us |
| 1899 | * so that we can retry it ourselves. We also |
| 1900 | * implement our own throttling mechanism so |
| 1901 | * we don't clobber the device with too many |
| 1902 | * commands. |
| 1903 | */ |
| 1904 | switch (ahd_get_scsi_status(scb)) { |
| 1905 | default: |
| 1906 | break; |
| 1907 | case SCSI_STATUS_CHECK_COND: |
| 1908 | case SCSI_STATUS_CMD_TERMINATED: |
| 1909 | { |
| 1910 | struct scsi_cmnd *cmd; |
| 1911 | |
| 1912 | /* |
| 1913 | * Copy sense information to the OS's cmd |
| 1914 | * structure if it is available. |
| 1915 | */ |
| 1916 | cmd = scb->io_ctx; |
| 1917 | if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) { |
| 1918 | struct scsi_status_iu_header *siu; |
| 1919 | u_int sense_size; |
| 1920 | u_int sense_offset; |
| 1921 | |
| 1922 | if (scb->flags & SCB_SENSE) { |
| 1923 | sense_size = min(sizeof(struct scsi_sense_data) |
| 1924 | - ahd_get_sense_residual(scb), |
| 1925 | (u_long)SCSI_SENSE_BUFFERSIZE); |
| 1926 | sense_offset = 0; |
| 1927 | } else { |
| 1928 | /* |
| 1929 | * Copy only the sense data into the provided |
| 1930 | * buffer. |
| 1931 | */ |
| 1932 | siu = (struct scsi_status_iu_header *) |
| 1933 | scb->sense_data; |
| 1934 | sense_size = min_t(size_t, |
| 1935 | scsi_4btoul(siu->sense_length), |
| 1936 | SCSI_SENSE_BUFFERSIZE); |
| 1937 | sense_offset = SIU_SENSE_OFFSET(siu); |
| 1938 | } |
| 1939 | |
| 1940 | memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); |
| 1941 | memcpy(cmd->sense_buffer, |
| 1942 | ahd_get_sense_buf(ahd, scb) |
| 1943 | + sense_offset, sense_size); |
| 1944 | cmd->result |= (DRIVER_SENSE << 24); |
| 1945 | |
| 1946 | #ifdef AHD_DEBUG |
| 1947 | if (ahd_debug & AHD_SHOW_SENSE) { |
| 1948 | int i; |
| 1949 | |
| 1950 | printk("Copied %d bytes of sense data at %d:", |
| 1951 | sense_size, sense_offset); |
| 1952 | for (i = 0; i < sense_size; i++) { |
| 1953 | if ((i & 0xF) == 0) |
| 1954 | printk("\n"); |
| 1955 | printk("0x%x ", cmd->sense_buffer[i]); |
| 1956 | } |
| 1957 | printk("\n"); |
| 1958 | } |
| 1959 | #endif |
| 1960 | } |
| 1961 | break; |
| 1962 | } |
| 1963 | case SCSI_STATUS_QUEUE_FULL: |
| 1964 | /* |
| 1965 | * By the time the core driver has returned this |
| 1966 | * command, all other commands that were queued |
| 1967 | * to us but not the device have been returned. |
| 1968 | * This ensures that dev->active is equal to |
| 1969 | * the number of commands actually queued to |
| 1970 | * the device. |
| 1971 | */ |
| 1972 | dev->tag_success_count = 0; |
| 1973 | if (dev->active != 0) { |
| 1974 | /* |
| 1975 | * Drop our opening count to the number |
| 1976 | * of commands currently outstanding. |
| 1977 | */ |
| 1978 | dev->openings = 0; |
| 1979 | #ifdef AHD_DEBUG |
| 1980 | if ((ahd_debug & AHD_SHOW_QFULL) != 0) { |
| 1981 | ahd_print_path(ahd, scb); |
| 1982 | printk("Dropping tag count to %d\n", |
| 1983 | dev->active); |
| 1984 | } |
| 1985 | #endif |
| 1986 | if (dev->active == dev->tags_on_last_queuefull) { |
| 1987 | |
| 1988 | dev->last_queuefull_same_count++; |
| 1989 | /* |
| 1990 | * If we repeatedly see a queue full |
| 1991 | * at the same queue depth, this |
| 1992 | * device has a fixed number of tag |
| 1993 | * slots. Lock in this tag depth |
| 1994 | * so we stop seeing queue fulls from |
| 1995 | * this device. |
| 1996 | */ |
| 1997 | if (dev->last_queuefull_same_count |
| 1998 | == AHD_LOCK_TAGS_COUNT) { |
| 1999 | dev->maxtags = dev->active; |
| 2000 | ahd_print_path(ahd, scb); |
| 2001 | printk("Locking max tag count at %d\n", |
| 2002 | dev->active); |
| 2003 | } |
| 2004 | } else { |
| 2005 | dev->tags_on_last_queuefull = dev->active; |
| 2006 | dev->last_queuefull_same_count = 0; |
| 2007 | } |
| 2008 | ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); |
| 2009 | ahd_set_scsi_status(scb, SCSI_STATUS_OK); |
| 2010 | ahd_platform_set_tags(ahd, sdev, &devinfo, |
| 2011 | (dev->flags & AHD_DEV_Q_BASIC) |
| 2012 | ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); |
| 2013 | break; |
| 2014 | } |
| 2015 | /* |
| 2016 | * Drop down to a single opening, and treat this |
| 2017 | * as if the target returned BUSY SCSI status. |
| 2018 | */ |
| 2019 | dev->openings = 1; |
| 2020 | ahd_platform_set_tags(ahd, sdev, &devinfo, |
| 2021 | (dev->flags & AHD_DEV_Q_BASIC) |
| 2022 | ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); |
| 2023 | ahd_set_scsi_status(scb, SCSI_STATUS_BUSY); |
| 2024 | } |
| 2025 | } |
| 2026 | |
| 2027 | static void |
| 2028 | ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd) |
| 2029 | { |
| 2030 | int status; |
| 2031 | int new_status = DID_OK; |
| 2032 | int do_fallback = 0; |
| 2033 | int scsi_status; |
| 2034 | |
| 2035 | /* |
| 2036 | * Map CAM error codes into Linux Error codes. We |
| 2037 | * avoid the conversion so that the DV code has the |
| 2038 | * full error information available when making |
| 2039 | * state change decisions. |
| 2040 | */ |
| 2041 | |
| 2042 | status = ahd_cmd_get_transaction_status(cmd); |
| 2043 | switch (status) { |
| 2044 | case CAM_REQ_INPROG: |
| 2045 | case CAM_REQ_CMP: |
| 2046 | new_status = DID_OK; |
| 2047 | break; |
| 2048 | case CAM_AUTOSENSE_FAIL: |
| 2049 | new_status = DID_ERROR; |
| 2050 | /* Fallthrough */ |
| 2051 | case CAM_SCSI_STATUS_ERROR: |
| 2052 | scsi_status = ahd_cmd_get_scsi_status(cmd); |
| 2053 | |
| 2054 | switch(scsi_status) { |
| 2055 | case SCSI_STATUS_CMD_TERMINATED: |
| 2056 | case SCSI_STATUS_CHECK_COND: |
| 2057 | if ((cmd->result >> 24) != DRIVER_SENSE) { |
| 2058 | do_fallback = 1; |
| 2059 | } else { |
| 2060 | struct scsi_sense_data *sense; |
| 2061 | |
| 2062 | sense = (struct scsi_sense_data *) |
| 2063 | cmd->sense_buffer; |
| 2064 | if (sense->extra_len >= 5 && |
| 2065 | (sense->add_sense_code == 0x47 |
| 2066 | || sense->add_sense_code == 0x48)) |
| 2067 | do_fallback = 1; |
| 2068 | } |
| 2069 | break; |
| 2070 | default: |
| 2071 | break; |
| 2072 | } |
| 2073 | break; |
| 2074 | case CAM_REQ_ABORTED: |
| 2075 | new_status = DID_ABORT; |
| 2076 | break; |
| 2077 | case CAM_BUSY: |
| 2078 | new_status = DID_BUS_BUSY; |
| 2079 | break; |
| 2080 | case CAM_REQ_INVALID: |
| 2081 | case CAM_PATH_INVALID: |
| 2082 | new_status = DID_BAD_TARGET; |
| 2083 | break; |
| 2084 | case CAM_SEL_TIMEOUT: |
| 2085 | new_status = DID_NO_CONNECT; |
| 2086 | break; |
| 2087 | case CAM_SCSI_BUS_RESET: |
| 2088 | case CAM_BDR_SENT: |
| 2089 | new_status = DID_RESET; |
| 2090 | break; |
| 2091 | case CAM_UNCOR_PARITY: |
| 2092 | new_status = DID_PARITY; |
| 2093 | do_fallback = 1; |
| 2094 | break; |
| 2095 | case CAM_CMD_TIMEOUT: |
| 2096 | new_status = DID_TIME_OUT; |
| 2097 | do_fallback = 1; |
| 2098 | break; |
| 2099 | case CAM_REQ_CMP_ERR: |
| 2100 | case CAM_UNEXP_BUSFREE: |
| 2101 | case CAM_DATA_RUN_ERR: |
| 2102 | new_status = DID_ERROR; |
| 2103 | do_fallback = 1; |
| 2104 | break; |
| 2105 | case CAM_UA_ABORT: |
| 2106 | case CAM_NO_HBA: |
| 2107 | case CAM_SEQUENCE_FAIL: |
| 2108 | case CAM_CCB_LEN_ERR: |
| 2109 | case CAM_PROVIDE_FAIL: |
| 2110 | case CAM_REQ_TERMIO: |
| 2111 | case CAM_UNREC_HBA_ERROR: |
| 2112 | case CAM_REQ_TOO_BIG: |
| 2113 | new_status = DID_ERROR; |
| 2114 | break; |
| 2115 | case CAM_REQUEUE_REQ: |
| 2116 | new_status = DID_REQUEUE; |
| 2117 | break; |
| 2118 | default: |
| 2119 | /* We should never get here */ |
| 2120 | new_status = DID_ERROR; |
| 2121 | break; |
| 2122 | } |
| 2123 | |
| 2124 | if (do_fallback) { |
| 2125 | printk("%s: device overrun (status %x) on %d:%d:%d\n", |
| 2126 | ahd_name(ahd), status, cmd->device->channel, |
| 2127 | cmd->device->id, (u8)cmd->device->lun); |
| 2128 | } |
| 2129 | |
| 2130 | ahd_cmd_set_transaction_status(cmd, new_status); |
| 2131 | |
| 2132 | cmd->scsi_done(cmd); |
| 2133 | } |
| 2134 | |
| 2135 | static void |
| 2136 | ahd_freeze_simq(struct ahd_softc *ahd) |
| 2137 | { |
| 2138 | scsi_block_requests(ahd->platform_data->host); |
| 2139 | } |
| 2140 | |
| 2141 | static void |
| 2142 | ahd_release_simq(struct ahd_softc *ahd) |
| 2143 | { |
| 2144 | scsi_unblock_requests(ahd->platform_data->host); |
| 2145 | } |
| 2146 | |
| 2147 | static int |
| 2148 | ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd) |
| 2149 | { |
| 2150 | struct ahd_softc *ahd; |
| 2151 | struct ahd_linux_device *dev; |
| 2152 | struct scb *pending_scb; |
| 2153 | u_int saved_scbptr; |
| 2154 | u_int active_scbptr; |
| 2155 | u_int last_phase; |
| 2156 | u_int saved_scsiid; |
| 2157 | u_int cdb_byte; |
| 2158 | int retval; |
| 2159 | int was_paused; |
| 2160 | int paused; |
| 2161 | int wait; |
| 2162 | int disconnected; |
| 2163 | ahd_mode_state saved_modes; |
| 2164 | unsigned long flags; |
| 2165 | |
| 2166 | pending_scb = NULL; |
| 2167 | paused = FALSE; |
| 2168 | wait = FALSE; |
| 2169 | ahd = *(struct ahd_softc **)cmd->device->host->hostdata; |
| 2170 | |
| 2171 | scmd_printk(KERN_INFO, cmd, |
| 2172 | "Attempting to queue an ABORT message:"); |
| 2173 | |
| 2174 | printk("CDB:"); |
| 2175 | for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) |
| 2176 | printk(" 0x%x", cmd->cmnd[cdb_byte]); |
| 2177 | printk("\n"); |
| 2178 | |
| 2179 | ahd_lock(ahd, &flags); |
| 2180 | |
| 2181 | /* |
| 2182 | * First determine if we currently own this command. |
| 2183 | * Start by searching the device queue. If not found |
| 2184 | * there, check the pending_scb list. If not found |
| 2185 | * at all, and the system wanted us to just abort the |
| 2186 | * command, return success. |
| 2187 | */ |
| 2188 | dev = scsi_transport_device_data(cmd->device); |
| 2189 | |
| 2190 | if (dev == NULL) { |
| 2191 | /* |
| 2192 | * No target device for this command exists, |
| 2193 | * so we must not still own the command. |
| 2194 | */ |
| 2195 | scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); |
| 2196 | retval = SUCCESS; |
| 2197 | goto no_cmd; |
| 2198 | } |
| 2199 | |
| 2200 | /* |
| 2201 | * See if we can find a matching cmd in the pending list. |
| 2202 | */ |
| 2203 | LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { |
| 2204 | if (pending_scb->io_ctx == cmd) |
| 2205 | break; |
| 2206 | } |
| 2207 | |
| 2208 | if (pending_scb == NULL) { |
| 2209 | scmd_printk(KERN_INFO, cmd, "Command not found\n"); |
| 2210 | goto no_cmd; |
| 2211 | } |
| 2212 | |
| 2213 | if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { |
| 2214 | /* |
| 2215 | * We can't queue two recovery actions using the same SCB |
| 2216 | */ |
| 2217 | retval = FAILED; |
| 2218 | goto done; |
| 2219 | } |
| 2220 | |
| 2221 | /* |
| 2222 | * Ensure that the card doesn't do anything |
| 2223 | * behind our back. Also make sure that we |
| 2224 | * didn't "just" miss an interrupt that would |
| 2225 | * affect this cmd. |
| 2226 | */ |
| 2227 | was_paused = ahd_is_paused(ahd); |
| 2228 | ahd_pause_and_flushwork(ahd); |
| 2229 | paused = TRUE; |
| 2230 | |
| 2231 | if ((pending_scb->flags & SCB_ACTIVE) == 0) { |
| 2232 | scmd_printk(KERN_INFO, cmd, "Command already completed\n"); |
| 2233 | goto no_cmd; |
| 2234 | } |
| 2235 | |
| 2236 | printk("%s: At time of recovery, card was %spaused\n", |
| 2237 | ahd_name(ahd), was_paused ? "" : "not "); |
| 2238 | ahd_dump_card_state(ahd); |
| 2239 | |
| 2240 | disconnected = TRUE; |
| 2241 | if (ahd_search_qinfifo(ahd, cmd->device->id, |
| 2242 | cmd->device->channel + 'A', |
| 2243 | cmd->device->lun, |
| 2244 | pending_scb->hscb->tag, |
| 2245 | ROLE_INITIATOR, CAM_REQ_ABORTED, |
| 2246 | SEARCH_COMPLETE) > 0) { |
| 2247 | printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", |
| 2248 | ahd_name(ahd), cmd->device->channel, |
| 2249 | cmd->device->id, (u8)cmd->device->lun); |
| 2250 | retval = SUCCESS; |
| 2251 | goto done; |
| 2252 | } |
| 2253 | |
| 2254 | saved_modes = ahd_save_modes(ahd); |
| 2255 | ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); |
| 2256 | last_phase = ahd_inb(ahd, LASTPHASE); |
| 2257 | saved_scbptr = ahd_get_scbptr(ahd); |
| 2258 | active_scbptr = saved_scbptr; |
| 2259 | if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { |
| 2260 | struct scb *bus_scb; |
| 2261 | |
| 2262 | bus_scb = ahd_lookup_scb(ahd, active_scbptr); |
| 2263 | if (bus_scb == pending_scb) |
| 2264 | disconnected = FALSE; |
| 2265 | } |
| 2266 | |
| 2267 | /* |
| 2268 | * At this point, pending_scb is the scb associated with the |
| 2269 | * passed in command. That command is currently active on the |
| 2270 | * bus or is in the disconnected state. |
| 2271 | */ |
| 2272 | saved_scsiid = ahd_inb(ahd, SAVED_SCSIID); |
| 2273 | if (last_phase != P_BUSFREE |
| 2274 | && SCB_GET_TAG(pending_scb) == active_scbptr) { |
| 2275 | |
| 2276 | /* |
| 2277 | * We're active on the bus, so assert ATN |
| 2278 | * and hope that the target responds. |
| 2279 | */ |
| 2280 | pending_scb = ahd_lookup_scb(ahd, active_scbptr); |
| 2281 | pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; |
| 2282 | ahd_outb(ahd, MSG_OUT, HOST_MSG); |
| 2283 | ahd_outb(ahd, SCSISIGO, last_phase|ATNO); |
| 2284 | scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); |
| 2285 | wait = TRUE; |
| 2286 | } else if (disconnected) { |
| 2287 | |
| 2288 | /* |
| 2289 | * Actually re-queue this SCB in an attempt |
| 2290 | * to select the device before it reconnects. |
| 2291 | */ |
| 2292 | pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; |
| 2293 | ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb)); |
| 2294 | pending_scb->hscb->cdb_len = 0; |
| 2295 | pending_scb->hscb->task_attribute = 0; |
| 2296 | pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK; |
| 2297 | |
| 2298 | if ((pending_scb->flags & SCB_PACKETIZED) != 0) { |
| 2299 | /* |
| 2300 | * Mark the SCB has having an outstanding |
| 2301 | * task management function. Should the command |
| 2302 | * complete normally before the task management |
| 2303 | * function can be sent, the host will be notified |
| 2304 | * to abort our requeued SCB. |
| 2305 | */ |
| 2306 | ahd_outb(ahd, SCB_TASK_MANAGEMENT, |
| 2307 | pending_scb->hscb->task_management); |
| 2308 | } else { |
| 2309 | /* |
| 2310 | * If non-packetized, set the MK_MESSAGE control |
| 2311 | * bit indicating that we desire to send a message. |
| 2312 | * We also set the disconnected flag since there is |
| 2313 | * no guarantee that our SCB control byte matches |
| 2314 | * the version on the card. We don't want the |
| 2315 | * sequencer to abort the command thinking an |
| 2316 | * unsolicited reselection occurred. |
| 2317 | */ |
| 2318 | pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; |
| 2319 | |
| 2320 | /* |
| 2321 | * The sequencer will never re-reference the |
| 2322 | * in-core SCB. To make sure we are notified |
| 2323 | * during reselection, set the MK_MESSAGE flag in |
| 2324 | * the card's copy of the SCB. |
| 2325 | */ |
| 2326 | ahd_outb(ahd, SCB_CONTROL, |
| 2327 | ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE); |
| 2328 | } |
| 2329 | |
| 2330 | /* |
| 2331 | * Clear out any entries in the QINFIFO first |
| 2332 | * so we are the next SCB for this target |
| 2333 | * to run. |
| 2334 | */ |
| 2335 | ahd_search_qinfifo(ahd, cmd->device->id, |
| 2336 | cmd->device->channel + 'A', cmd->device->lun, |
| 2337 | SCB_LIST_NULL, ROLE_INITIATOR, |
| 2338 | CAM_REQUEUE_REQ, SEARCH_COMPLETE); |
| 2339 | ahd_qinfifo_requeue_tail(ahd, pending_scb); |
| 2340 | ahd_set_scbptr(ahd, saved_scbptr); |
| 2341 | ahd_print_path(ahd, pending_scb); |
| 2342 | printk("Device is disconnected, re-queuing SCB\n"); |
| 2343 | wait = TRUE; |
| 2344 | } else { |
| 2345 | scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); |
| 2346 | retval = FAILED; |
| 2347 | goto done; |
| 2348 | } |
| 2349 | |
| 2350 | no_cmd: |
| 2351 | /* |
| 2352 | * Our assumption is that if we don't have the command, no |
| 2353 | * recovery action was required, so we return success. Again, |
| 2354 | * the semantics of the mid-layer recovery engine are not |
| 2355 | * well defined, so this may change in time. |
| 2356 | */ |
| 2357 | retval = SUCCESS; |
| 2358 | done: |
| 2359 | if (paused) |
| 2360 | ahd_unpause(ahd); |
| 2361 | if (wait) { |
| 2362 | DECLARE_COMPLETION_ONSTACK(done); |
| 2363 | |
| 2364 | ahd->platform_data->eh_done = &done; |
| 2365 | ahd_unlock(ahd, &flags); |
| 2366 | |
| 2367 | printk("%s: Recovery code sleeping\n", ahd_name(ahd)); |
| 2368 | if (!wait_for_completion_timeout(&done, 5 * HZ)) { |
| 2369 | ahd_lock(ahd, &flags); |
| 2370 | ahd->platform_data->eh_done = NULL; |
| 2371 | ahd_unlock(ahd, &flags); |
| 2372 | printk("%s: Timer Expired (active %d)\n", |
| 2373 | ahd_name(ahd), dev->active); |
| 2374 | retval = FAILED; |
| 2375 | } |
| 2376 | printk("Recovery code awake\n"); |
| 2377 | } else |
| 2378 | ahd_unlock(ahd, &flags); |
| 2379 | |
| 2380 | if (retval != SUCCESS) |
| 2381 | printk("%s: Command abort returning 0x%x\n", |
| 2382 | ahd_name(ahd), retval); |
| 2383 | |
| 2384 | return retval; |
| 2385 | } |
| 2386 | |
| 2387 | static void ahd_linux_set_width(struct scsi_target *starget, int width) |
| 2388 | { |
| 2389 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 2390 | struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); |
| 2391 | struct ahd_devinfo devinfo; |
| 2392 | unsigned long flags; |
| 2393 | |
| 2394 | ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
| 2395 | starget->channel + 'A', ROLE_INITIATOR); |
| 2396 | ahd_lock(ahd, &flags); |
| 2397 | ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE); |
| 2398 | ahd_unlock(ahd, &flags); |
| 2399 | } |
| 2400 | |
| 2401 | static void ahd_linux_set_period(struct scsi_target *starget, int period) |
| 2402 | { |
| 2403 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 2404 | struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); |
| 2405 | struct ahd_tmode_tstate *tstate; |
| 2406 | struct ahd_initiator_tinfo *tinfo |
| 2407 | = ahd_fetch_transinfo(ahd, |
| 2408 | starget->channel + 'A', |
| 2409 | shost->this_id, starget->id, &tstate); |
| 2410 | struct ahd_devinfo devinfo; |
| 2411 | unsigned int ppr_options = tinfo->goal.ppr_options; |
| 2412 | unsigned int dt; |
| 2413 | unsigned long flags; |
| 2414 | unsigned long offset = tinfo->goal.offset; |
| 2415 | |
| 2416 | #ifdef AHD_DEBUG |
| 2417 | if ((ahd_debug & AHD_SHOW_DV) != 0) |
| 2418 | printk("%s: set period to %d\n", ahd_name(ahd), period); |
| 2419 | #endif |
| 2420 | if (offset == 0) |
| 2421 | offset = MAX_OFFSET; |
| 2422 | |
| 2423 | if (period < 8) |
| 2424 | period = 8; |
| 2425 | if (period < 10) { |
| 2426 | if (spi_max_width(starget)) { |
| 2427 | ppr_options |= MSG_EXT_PPR_DT_REQ; |
| 2428 | if (period == 8) |
| 2429 | ppr_options |= MSG_EXT_PPR_IU_REQ; |
| 2430 | } else |
| 2431 | period = 10; |
| 2432 | } |
| 2433 | |
| 2434 | dt = ppr_options & MSG_EXT_PPR_DT_REQ; |
| 2435 | |
| 2436 | ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
| 2437 | starget->channel + 'A', ROLE_INITIATOR); |
| 2438 | |
| 2439 | /* all PPR requests apart from QAS require wide transfers */ |
| 2440 | if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { |
| 2441 | if (spi_width(starget) == 0) |
| 2442 | ppr_options &= MSG_EXT_PPR_QAS_REQ; |
| 2443 | } |
| 2444 | |
| 2445 | ahd_find_syncrate(ahd, &period, &ppr_options, |
| 2446 | dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); |
| 2447 | |
| 2448 | ahd_lock(ahd, &flags); |
| 2449 | ahd_set_syncrate(ahd, &devinfo, period, offset, |
| 2450 | ppr_options, AHD_TRANS_GOAL, FALSE); |
| 2451 | ahd_unlock(ahd, &flags); |
| 2452 | } |
| 2453 | |
| 2454 | static void ahd_linux_set_offset(struct scsi_target *starget, int offset) |
| 2455 | { |
| 2456 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 2457 | struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); |
| 2458 | struct ahd_tmode_tstate *tstate; |
| 2459 | struct ahd_initiator_tinfo *tinfo |
| 2460 | = ahd_fetch_transinfo(ahd, |
| 2461 | starget->channel + 'A', |
| 2462 | shost->this_id, starget->id, &tstate); |
| 2463 | struct ahd_devinfo devinfo; |
| 2464 | unsigned int ppr_options = 0; |
| 2465 | unsigned int period = 0; |
| 2466 | unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; |
| 2467 | unsigned long flags; |
| 2468 | |
| 2469 | #ifdef AHD_DEBUG |
| 2470 | if ((ahd_debug & AHD_SHOW_DV) != 0) |
| 2471 | printk("%s: set offset to %d\n", ahd_name(ahd), offset); |
| 2472 | #endif |
| 2473 | |
| 2474 | ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
| 2475 | starget->channel + 'A', ROLE_INITIATOR); |
| 2476 | if (offset != 0) { |
| 2477 | period = tinfo->goal.period; |
| 2478 | ppr_options = tinfo->goal.ppr_options; |
| 2479 | ahd_find_syncrate(ahd, &period, &ppr_options, |
| 2480 | dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); |
| 2481 | } |
| 2482 | |
| 2483 | ahd_lock(ahd, &flags); |
| 2484 | ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options, |
| 2485 | AHD_TRANS_GOAL, FALSE); |
| 2486 | ahd_unlock(ahd, &flags); |
| 2487 | } |
| 2488 | |
| 2489 | static void ahd_linux_set_dt(struct scsi_target *starget, int dt) |
| 2490 | { |
| 2491 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 2492 | struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); |
| 2493 | struct ahd_tmode_tstate *tstate; |
| 2494 | struct ahd_initiator_tinfo *tinfo |
| 2495 | = ahd_fetch_transinfo(ahd, |
| 2496 | starget->channel + 'A', |
| 2497 | shost->this_id, starget->id, &tstate); |
| 2498 | struct ahd_devinfo devinfo; |
| 2499 | unsigned int ppr_options = tinfo->goal.ppr_options |
| 2500 | & ~MSG_EXT_PPR_DT_REQ; |
| 2501 | unsigned int period = tinfo->goal.period; |
| 2502 | unsigned int width = tinfo->goal.width; |
| 2503 | unsigned long flags; |
| 2504 | |
| 2505 | #ifdef AHD_DEBUG |
| 2506 | if ((ahd_debug & AHD_SHOW_DV) != 0) |
| 2507 | printk("%s: %s DT\n", ahd_name(ahd), |
| 2508 | dt ? "enabling" : "disabling"); |
| 2509 | #endif |
| 2510 | if (dt && spi_max_width(starget)) { |
| 2511 | ppr_options |= MSG_EXT_PPR_DT_REQ; |
| 2512 | if (!width) |
| 2513 | ahd_linux_set_width(starget, 1); |
| 2514 | } else { |
| 2515 | if (period <= 9) |
| 2516 | period = 10; /* If resetting DT, period must be >= 25ns */ |
| 2517 | /* IU is invalid without DT set */ |
| 2518 | ppr_options &= ~MSG_EXT_PPR_IU_REQ; |
| 2519 | } |
| 2520 | ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
| 2521 | starget->channel + 'A', ROLE_INITIATOR); |
| 2522 | ahd_find_syncrate(ahd, &period, &ppr_options, |
| 2523 | dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); |
| 2524 | |
| 2525 | ahd_lock(ahd, &flags); |
| 2526 | ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, |
| 2527 | ppr_options, AHD_TRANS_GOAL, FALSE); |
| 2528 | ahd_unlock(ahd, &flags); |
| 2529 | } |
| 2530 | |
| 2531 | static void ahd_linux_set_qas(struct scsi_target *starget, int qas) |
| 2532 | { |
| 2533 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 2534 | struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); |
| 2535 | struct ahd_tmode_tstate *tstate; |
| 2536 | struct ahd_initiator_tinfo *tinfo |
| 2537 | = ahd_fetch_transinfo(ahd, |
| 2538 | starget->channel + 'A', |
| 2539 | shost->this_id, starget->id, &tstate); |
| 2540 | struct ahd_devinfo devinfo; |
| 2541 | unsigned int ppr_options = tinfo->goal.ppr_options |
| 2542 | & ~MSG_EXT_PPR_QAS_REQ; |
| 2543 | unsigned int period = tinfo->goal.period; |
| 2544 | unsigned int dt; |
| 2545 | unsigned long flags; |
| 2546 | |
| 2547 | #ifdef AHD_DEBUG |
| 2548 | if ((ahd_debug & AHD_SHOW_DV) != 0) |
| 2549 | printk("%s: %s QAS\n", ahd_name(ahd), |
| 2550 | qas ? "enabling" : "disabling"); |
| 2551 | #endif |
| 2552 | |
| 2553 | if (qas) { |
| 2554 | ppr_options |= MSG_EXT_PPR_QAS_REQ; |
| 2555 | } |
| 2556 | |
| 2557 | dt = ppr_options & MSG_EXT_PPR_DT_REQ; |
| 2558 | |
| 2559 | ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
| 2560 | starget->channel + 'A', ROLE_INITIATOR); |
| 2561 | ahd_find_syncrate(ahd, &period, &ppr_options, |
| 2562 | dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); |
| 2563 | |
| 2564 | ahd_lock(ahd, &flags); |
| 2565 | ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, |
| 2566 | ppr_options, AHD_TRANS_GOAL, FALSE); |
| 2567 | ahd_unlock(ahd, &flags); |
| 2568 | } |
| 2569 | |
| 2570 | static void ahd_linux_set_iu(struct scsi_target *starget, int iu) |
| 2571 | { |
| 2572 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 2573 | struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); |
| 2574 | struct ahd_tmode_tstate *tstate; |
| 2575 | struct ahd_initiator_tinfo *tinfo |
| 2576 | = ahd_fetch_transinfo(ahd, |
| 2577 | starget->channel + 'A', |
| 2578 | shost->this_id, starget->id, &tstate); |
| 2579 | struct ahd_devinfo devinfo; |
| 2580 | unsigned int ppr_options = tinfo->goal.ppr_options |
| 2581 | & ~MSG_EXT_PPR_IU_REQ; |
| 2582 | unsigned int period = tinfo->goal.period; |
| 2583 | unsigned int dt; |
| 2584 | unsigned long flags; |
| 2585 | |
| 2586 | #ifdef AHD_DEBUG |
| 2587 | if ((ahd_debug & AHD_SHOW_DV) != 0) |
| 2588 | printk("%s: %s IU\n", ahd_name(ahd), |
| 2589 | iu ? "enabling" : "disabling"); |
| 2590 | #endif |
| 2591 | |
| 2592 | if (iu && spi_max_width(starget)) { |
| 2593 | ppr_options |= MSG_EXT_PPR_IU_REQ; |
| 2594 | ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */ |
| 2595 | } |
| 2596 | |
| 2597 | dt = ppr_options & MSG_EXT_PPR_DT_REQ; |
| 2598 | |
| 2599 | ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
| 2600 | starget->channel + 'A', ROLE_INITIATOR); |
| 2601 | ahd_find_syncrate(ahd, &period, &ppr_options, |
| 2602 | dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); |
| 2603 | |
| 2604 | ahd_lock(ahd, &flags); |
| 2605 | ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, |
| 2606 | ppr_options, AHD_TRANS_GOAL, FALSE); |
| 2607 | ahd_unlock(ahd, &flags); |
| 2608 | } |
| 2609 | |
| 2610 | static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm) |
| 2611 | { |
| 2612 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 2613 | struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); |
| 2614 | struct ahd_tmode_tstate *tstate; |
| 2615 | struct ahd_initiator_tinfo *tinfo |
| 2616 | = ahd_fetch_transinfo(ahd, |
| 2617 | starget->channel + 'A', |
| 2618 | shost->this_id, starget->id, &tstate); |
| 2619 | struct ahd_devinfo devinfo; |
| 2620 | unsigned int ppr_options = tinfo->goal.ppr_options |
| 2621 | & ~MSG_EXT_PPR_RD_STRM; |
| 2622 | unsigned int period = tinfo->goal.period; |
| 2623 | unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; |
| 2624 | unsigned long flags; |
| 2625 | |
| 2626 | #ifdef AHD_DEBUG |
| 2627 | if ((ahd_debug & AHD_SHOW_DV) != 0) |
| 2628 | printk("%s: %s Read Streaming\n", ahd_name(ahd), |
| 2629 | rdstrm ? "enabling" : "disabling"); |
| 2630 | #endif |
| 2631 | |
| 2632 | if (rdstrm && spi_max_width(starget)) |
| 2633 | ppr_options |= MSG_EXT_PPR_RD_STRM; |
| 2634 | |
| 2635 | ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
| 2636 | starget->channel + 'A', ROLE_INITIATOR); |
| 2637 | ahd_find_syncrate(ahd, &period, &ppr_options, |
| 2638 | dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); |
| 2639 | |
| 2640 | ahd_lock(ahd, &flags); |
| 2641 | ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, |
| 2642 | ppr_options, AHD_TRANS_GOAL, FALSE); |
| 2643 | ahd_unlock(ahd, &flags); |
| 2644 | } |
| 2645 | |
| 2646 | static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow) |
| 2647 | { |
| 2648 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 2649 | struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); |
| 2650 | struct ahd_tmode_tstate *tstate; |
| 2651 | struct ahd_initiator_tinfo *tinfo |
| 2652 | = ahd_fetch_transinfo(ahd, |
| 2653 | starget->channel + 'A', |
| 2654 | shost->this_id, starget->id, &tstate); |
| 2655 | struct ahd_devinfo devinfo; |
| 2656 | unsigned int ppr_options = tinfo->goal.ppr_options |
| 2657 | & ~MSG_EXT_PPR_WR_FLOW; |
| 2658 | unsigned int period = tinfo->goal.period; |
| 2659 | unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; |
| 2660 | unsigned long flags; |
| 2661 | |
| 2662 | #ifdef AHD_DEBUG |
| 2663 | if ((ahd_debug & AHD_SHOW_DV) != 0) |
| 2664 | printk("%s: %s Write Flow Control\n", ahd_name(ahd), |
| 2665 | wrflow ? "enabling" : "disabling"); |
| 2666 | #endif |
| 2667 | |
| 2668 | if (wrflow && spi_max_width(starget)) |
| 2669 | ppr_options |= MSG_EXT_PPR_WR_FLOW; |
| 2670 | |
| 2671 | ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
| 2672 | starget->channel + 'A', ROLE_INITIATOR); |
| 2673 | ahd_find_syncrate(ahd, &period, &ppr_options, |
| 2674 | dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); |
| 2675 | |
| 2676 | ahd_lock(ahd, &flags); |
| 2677 | ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, |
| 2678 | ppr_options, AHD_TRANS_GOAL, FALSE); |
| 2679 | ahd_unlock(ahd, &flags); |
| 2680 | } |
| 2681 | |
| 2682 | static void ahd_linux_set_rti(struct scsi_target *starget, int rti) |
| 2683 | { |
| 2684 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 2685 | struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); |
| 2686 | struct ahd_tmode_tstate *tstate; |
| 2687 | struct ahd_initiator_tinfo *tinfo |
| 2688 | = ahd_fetch_transinfo(ahd, |
| 2689 | starget->channel + 'A', |
| 2690 | shost->this_id, starget->id, &tstate); |
| 2691 | struct ahd_devinfo devinfo; |
| 2692 | unsigned int ppr_options = tinfo->goal.ppr_options |
| 2693 | & ~MSG_EXT_PPR_RTI; |
| 2694 | unsigned int period = tinfo->goal.period; |
| 2695 | unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; |
| 2696 | unsigned long flags; |
| 2697 | |
| 2698 | if ((ahd->features & AHD_RTI) == 0) { |
| 2699 | #ifdef AHD_DEBUG |
| 2700 | if ((ahd_debug & AHD_SHOW_DV) != 0) |
| 2701 | printk("%s: RTI not available\n", ahd_name(ahd)); |
| 2702 | #endif |
| 2703 | return; |
| 2704 | } |
| 2705 | |
| 2706 | #ifdef AHD_DEBUG |
| 2707 | if ((ahd_debug & AHD_SHOW_DV) != 0) |
| 2708 | printk("%s: %s RTI\n", ahd_name(ahd), |
| 2709 | rti ? "enabling" : "disabling"); |
| 2710 | #endif |
| 2711 | |
| 2712 | if (rti && spi_max_width(starget)) |
| 2713 | ppr_options |= MSG_EXT_PPR_RTI; |
| 2714 | |
| 2715 | ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
| 2716 | starget->channel + 'A', ROLE_INITIATOR); |
| 2717 | ahd_find_syncrate(ahd, &period, &ppr_options, |
| 2718 | dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); |
| 2719 | |
| 2720 | ahd_lock(ahd, &flags); |
| 2721 | ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, |
| 2722 | ppr_options, AHD_TRANS_GOAL, FALSE); |
| 2723 | ahd_unlock(ahd, &flags); |
| 2724 | } |
| 2725 | |
| 2726 | static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp) |
| 2727 | { |
| 2728 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 2729 | struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); |
| 2730 | struct ahd_tmode_tstate *tstate; |
| 2731 | struct ahd_initiator_tinfo *tinfo |
| 2732 | = ahd_fetch_transinfo(ahd, |
| 2733 | starget->channel + 'A', |
| 2734 | shost->this_id, starget->id, &tstate); |
| 2735 | struct ahd_devinfo devinfo; |
| 2736 | unsigned int ppr_options = tinfo->goal.ppr_options |
| 2737 | & ~MSG_EXT_PPR_PCOMP_EN; |
| 2738 | unsigned int period = tinfo->goal.period; |
| 2739 | unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; |
| 2740 | unsigned long flags; |
| 2741 | |
| 2742 | #ifdef AHD_DEBUG |
| 2743 | if ((ahd_debug & AHD_SHOW_DV) != 0) |
| 2744 | printk("%s: %s Precompensation\n", ahd_name(ahd), |
| 2745 | pcomp ? "Enable" : "Disable"); |
| 2746 | #endif |
| 2747 | |
| 2748 | if (pcomp && spi_max_width(starget)) { |
| 2749 | uint8_t precomp; |
| 2750 | |
| 2751 | if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { |
| 2752 | const struct ahd_linux_iocell_opts *iocell_opts; |
| 2753 | |
| 2754 | iocell_opts = &aic79xx_iocell_info[ahd->unit]; |
| 2755 | precomp = iocell_opts->precomp; |
| 2756 | } else { |
| 2757 | precomp = AIC79XX_DEFAULT_PRECOMP; |
| 2758 | } |
| 2759 | ppr_options |= MSG_EXT_PPR_PCOMP_EN; |
| 2760 | AHD_SET_PRECOMP(ahd, precomp); |
| 2761 | } else { |
| 2762 | AHD_SET_PRECOMP(ahd, 0); |
| 2763 | } |
| 2764 | |
| 2765 | ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
| 2766 | starget->channel + 'A', ROLE_INITIATOR); |
| 2767 | ahd_find_syncrate(ahd, &period, &ppr_options, |
| 2768 | dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); |
| 2769 | |
| 2770 | ahd_lock(ahd, &flags); |
| 2771 | ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, |
| 2772 | ppr_options, AHD_TRANS_GOAL, FALSE); |
| 2773 | ahd_unlock(ahd, &flags); |
| 2774 | } |
| 2775 | |
| 2776 | static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold) |
| 2777 | { |
| 2778 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 2779 | struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); |
| 2780 | struct ahd_tmode_tstate *tstate; |
| 2781 | struct ahd_initiator_tinfo *tinfo |
| 2782 | = ahd_fetch_transinfo(ahd, |
| 2783 | starget->channel + 'A', |
| 2784 | shost->this_id, starget->id, &tstate); |
| 2785 | struct ahd_devinfo devinfo; |
| 2786 | unsigned int ppr_options = tinfo->goal.ppr_options |
| 2787 | & ~MSG_EXT_PPR_HOLD_MCS; |
| 2788 | unsigned int period = tinfo->goal.period; |
| 2789 | unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; |
| 2790 | unsigned long flags; |
| 2791 | |
| 2792 | if (hold && spi_max_width(starget)) |
| 2793 | ppr_options |= MSG_EXT_PPR_HOLD_MCS; |
| 2794 | |
| 2795 | ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
| 2796 | starget->channel + 'A', ROLE_INITIATOR); |
| 2797 | ahd_find_syncrate(ahd, &period, &ppr_options, |
| 2798 | dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); |
| 2799 | |
| 2800 | ahd_lock(ahd, &flags); |
| 2801 | ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, |
| 2802 | ppr_options, AHD_TRANS_GOAL, FALSE); |
| 2803 | ahd_unlock(ahd, &flags); |
| 2804 | } |
| 2805 | |
| 2806 | static void ahd_linux_get_signalling(struct Scsi_Host *shost) |
| 2807 | { |
| 2808 | struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata; |
| 2809 | unsigned long flags; |
| 2810 | u8 mode; |
| 2811 | |
| 2812 | ahd_lock(ahd, &flags); |
| 2813 | ahd_pause(ahd); |
| 2814 | mode = ahd_inb(ahd, SBLKCTL); |
| 2815 | ahd_unpause(ahd); |
| 2816 | ahd_unlock(ahd, &flags); |
| 2817 | |
| 2818 | if (mode & ENAB40) |
| 2819 | spi_signalling(shost) = SPI_SIGNAL_LVD; |
| 2820 | else if (mode & ENAB20) |
| 2821 | spi_signalling(shost) = SPI_SIGNAL_SE; |
| 2822 | else |
| 2823 | spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; |
| 2824 | } |
| 2825 | |
| 2826 | static struct spi_function_template ahd_linux_transport_functions = { |
| 2827 | .set_offset = ahd_linux_set_offset, |
| 2828 | .show_offset = 1, |
| 2829 | .set_period = ahd_linux_set_period, |
| 2830 | .show_period = 1, |
| 2831 | .set_width = ahd_linux_set_width, |
| 2832 | .show_width = 1, |
| 2833 | .set_dt = ahd_linux_set_dt, |
| 2834 | .show_dt = 1, |
| 2835 | .set_iu = ahd_linux_set_iu, |
| 2836 | .show_iu = 1, |
| 2837 | .set_qas = ahd_linux_set_qas, |
| 2838 | .show_qas = 1, |
| 2839 | .set_rd_strm = ahd_linux_set_rd_strm, |
| 2840 | .show_rd_strm = 1, |
| 2841 | .set_wr_flow = ahd_linux_set_wr_flow, |
| 2842 | .show_wr_flow = 1, |
| 2843 | .set_rti = ahd_linux_set_rti, |
| 2844 | .show_rti = 1, |
| 2845 | .set_pcomp_en = ahd_linux_set_pcomp_en, |
| 2846 | .show_pcomp_en = 1, |
| 2847 | .set_hold_mcs = ahd_linux_set_hold_mcs, |
| 2848 | .show_hold_mcs = 1, |
| 2849 | .get_signalling = ahd_linux_get_signalling, |
| 2850 | }; |
| 2851 | |
| 2852 | static int __init |
| 2853 | ahd_linux_init(void) |
| 2854 | { |
| 2855 | int error = 0; |
| 2856 | |
| 2857 | /* |
| 2858 | * If we've been passed any parameters, process them now. |
| 2859 | */ |
| 2860 | if (aic79xx) |
| 2861 | aic79xx_setup(aic79xx); |
| 2862 | |
| 2863 | ahd_linux_transport_template = |
| 2864 | spi_attach_transport(&ahd_linux_transport_functions); |
| 2865 | if (!ahd_linux_transport_template) |
| 2866 | return -ENODEV; |
| 2867 | |
| 2868 | scsi_transport_reserve_device(ahd_linux_transport_template, |
| 2869 | sizeof(struct ahd_linux_device)); |
| 2870 | |
| 2871 | error = ahd_linux_pci_init(); |
| 2872 | if (error) |
| 2873 | spi_release_transport(ahd_linux_transport_template); |
| 2874 | return error; |
| 2875 | } |
| 2876 | |
| 2877 | static void __exit |
| 2878 | ahd_linux_exit(void) |
| 2879 | { |
| 2880 | ahd_linux_pci_exit(); |
| 2881 | spi_release_transport(ahd_linux_transport_template); |
| 2882 | } |
| 2883 | |
| 2884 | module_init(ahd_linux_init); |
| 2885 | module_exit(ahd_linux_exit); |