| 1 | /* |
| 2 | * finite state machine for device handling |
| 3 | * |
| 4 | * Copyright IBM Corp. 2002, 2008 |
| 5 | * Author(s): Cornelia Huck (cornelia.huck@de.ibm.com) |
| 6 | * Martin Schwidefsky (schwidefsky@de.ibm.com) |
| 7 | */ |
| 8 | |
| 9 | #include <linux/module.h> |
| 10 | #include <linux/init.h> |
| 11 | #include <linux/jiffies.h> |
| 12 | #include <linux/string.h> |
| 13 | |
| 14 | #include <asm/ccwdev.h> |
| 15 | #include <asm/cio.h> |
| 16 | #include <asm/chpid.h> |
| 17 | |
| 18 | #include "cio.h" |
| 19 | #include "cio_debug.h" |
| 20 | #include "css.h" |
| 21 | #include "device.h" |
| 22 | #include "chsc.h" |
| 23 | #include "ioasm.h" |
| 24 | #include "chp.h" |
| 25 | |
| 26 | static int timeout_log_enabled; |
| 27 | |
| 28 | static int __init ccw_timeout_log_setup(char *unused) |
| 29 | { |
| 30 | timeout_log_enabled = 1; |
| 31 | return 1; |
| 32 | } |
| 33 | |
| 34 | __setup("ccw_timeout_log", ccw_timeout_log_setup); |
| 35 | |
| 36 | static void ccw_timeout_log(struct ccw_device *cdev) |
| 37 | { |
| 38 | struct schib schib; |
| 39 | struct subchannel *sch; |
| 40 | struct io_subchannel_private *private; |
| 41 | union orb *orb; |
| 42 | int cc; |
| 43 | |
| 44 | sch = to_subchannel(cdev->dev.parent); |
| 45 | private = to_io_private(sch); |
| 46 | orb = &private->orb; |
| 47 | cc = stsch_err(sch->schid, &schib); |
| 48 | |
| 49 | printk(KERN_WARNING "cio: ccw device timeout occurred at %llx, " |
| 50 | "device information:\n", get_tod_clock()); |
| 51 | printk(KERN_WARNING "cio: orb:\n"); |
| 52 | print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1, |
| 53 | orb, sizeof(*orb), 0); |
| 54 | printk(KERN_WARNING "cio: ccw device bus id: %s\n", |
| 55 | dev_name(&cdev->dev)); |
| 56 | printk(KERN_WARNING "cio: subchannel bus id: %s\n", |
| 57 | dev_name(&sch->dev)); |
| 58 | printk(KERN_WARNING "cio: subchannel lpm: %02x, opm: %02x, " |
| 59 | "vpm: %02x\n", sch->lpm, sch->opm, sch->vpm); |
| 60 | |
| 61 | if (orb->tm.b) { |
| 62 | printk(KERN_WARNING "cio: orb indicates transport mode\n"); |
| 63 | printk(KERN_WARNING "cio: last tcw:\n"); |
| 64 | print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1, |
| 65 | (void *)(addr_t)orb->tm.tcw, |
| 66 | sizeof(struct tcw), 0); |
| 67 | } else { |
| 68 | printk(KERN_WARNING "cio: orb indicates command mode\n"); |
| 69 | if ((void *)(addr_t)orb->cmd.cpa == &private->sense_ccw || |
| 70 | (void *)(addr_t)orb->cmd.cpa == cdev->private->iccws) |
| 71 | printk(KERN_WARNING "cio: last channel program " |
| 72 | "(intern):\n"); |
| 73 | else |
| 74 | printk(KERN_WARNING "cio: last channel program:\n"); |
| 75 | |
| 76 | print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1, |
| 77 | (void *)(addr_t)orb->cmd.cpa, |
| 78 | sizeof(struct ccw1), 0); |
| 79 | } |
| 80 | printk(KERN_WARNING "cio: ccw device state: %d\n", |
| 81 | cdev->private->state); |
| 82 | printk(KERN_WARNING "cio: store subchannel returned: cc=%d\n", cc); |
| 83 | printk(KERN_WARNING "cio: schib:\n"); |
| 84 | print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1, |
| 85 | &schib, sizeof(schib), 0); |
| 86 | printk(KERN_WARNING "cio: ccw device flags:\n"); |
| 87 | print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1, |
| 88 | &cdev->private->flags, sizeof(cdev->private->flags), 0); |
| 89 | } |
| 90 | |
| 91 | /* |
| 92 | * Timeout function. It just triggers a DEV_EVENT_TIMEOUT. |
| 93 | */ |
| 94 | static void |
| 95 | ccw_device_timeout(unsigned long data) |
| 96 | { |
| 97 | struct ccw_device *cdev; |
| 98 | |
| 99 | cdev = (struct ccw_device *) data; |
| 100 | spin_lock_irq(cdev->ccwlock); |
| 101 | if (timeout_log_enabled) |
| 102 | ccw_timeout_log(cdev); |
| 103 | dev_fsm_event(cdev, DEV_EVENT_TIMEOUT); |
| 104 | spin_unlock_irq(cdev->ccwlock); |
| 105 | } |
| 106 | |
| 107 | /* |
| 108 | * Set timeout |
| 109 | */ |
| 110 | void |
| 111 | ccw_device_set_timeout(struct ccw_device *cdev, int expires) |
| 112 | { |
| 113 | if (expires == 0) { |
| 114 | del_timer(&cdev->private->timer); |
| 115 | return; |
| 116 | } |
| 117 | if (timer_pending(&cdev->private->timer)) { |
| 118 | if (mod_timer(&cdev->private->timer, jiffies + expires)) |
| 119 | return; |
| 120 | } |
| 121 | cdev->private->timer.function = ccw_device_timeout; |
| 122 | cdev->private->timer.data = (unsigned long) cdev; |
| 123 | cdev->private->timer.expires = jiffies + expires; |
| 124 | add_timer(&cdev->private->timer); |
| 125 | } |
| 126 | |
| 127 | /* |
| 128 | * Cancel running i/o. This is called repeatedly since halt/clear are |
| 129 | * asynchronous operations. We do one try with cio_cancel, two tries |
| 130 | * with cio_halt, 255 tries with cio_clear. If everythings fails panic. |
| 131 | * Returns 0 if device now idle, -ENODEV for device not operational and |
| 132 | * -EBUSY if an interrupt is expected (either from halt/clear or from a |
| 133 | * status pending). |
| 134 | */ |
| 135 | int |
| 136 | ccw_device_cancel_halt_clear(struct ccw_device *cdev) |
| 137 | { |
| 138 | struct subchannel *sch; |
| 139 | int ret; |
| 140 | |
| 141 | sch = to_subchannel(cdev->dev.parent); |
| 142 | if (cio_update_schib(sch)) |
| 143 | return -ENODEV; |
| 144 | if (!sch->schib.pmcw.ena) |
| 145 | /* Not operational -> done. */ |
| 146 | return 0; |
| 147 | /* Stage 1: cancel io. */ |
| 148 | if (!(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_HALT_PEND) && |
| 149 | !(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_CLEAR_PEND)) { |
| 150 | if (!scsw_is_tm(&sch->schib.scsw)) { |
| 151 | ret = cio_cancel(sch); |
| 152 | if (ret != -EINVAL) |
| 153 | return ret; |
| 154 | } |
| 155 | /* cancel io unsuccessful or not applicable (transport mode). |
| 156 | * Continue with asynchronous instructions. */ |
| 157 | cdev->private->iretry = 3; /* 3 halt retries. */ |
| 158 | } |
| 159 | if (!(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_CLEAR_PEND)) { |
| 160 | /* Stage 2: halt io. */ |
| 161 | if (cdev->private->iretry) { |
| 162 | cdev->private->iretry--; |
| 163 | ret = cio_halt(sch); |
| 164 | if (ret != -EBUSY) |
| 165 | return (ret == 0) ? -EBUSY : ret; |
| 166 | } |
| 167 | /* halt io unsuccessful. */ |
| 168 | cdev->private->iretry = 255; /* 255 clear retries. */ |
| 169 | } |
| 170 | /* Stage 3: clear io. */ |
| 171 | if (cdev->private->iretry) { |
| 172 | cdev->private->iretry--; |
| 173 | ret = cio_clear (sch); |
| 174 | return (ret == 0) ? -EBUSY : ret; |
| 175 | } |
| 176 | /* Function was unsuccessful */ |
| 177 | CIO_MSG_EVENT(0, "0.%x.%04x: could not stop I/O\n", |
| 178 | cdev->private->dev_id.ssid, cdev->private->dev_id.devno); |
| 179 | return -EIO; |
| 180 | } |
| 181 | |
| 182 | void ccw_device_update_sense_data(struct ccw_device *cdev) |
| 183 | { |
| 184 | memset(&cdev->id, 0, sizeof(cdev->id)); |
| 185 | cdev->id.cu_type = cdev->private->senseid.cu_type; |
| 186 | cdev->id.cu_model = cdev->private->senseid.cu_model; |
| 187 | cdev->id.dev_type = cdev->private->senseid.dev_type; |
| 188 | cdev->id.dev_model = cdev->private->senseid.dev_model; |
| 189 | } |
| 190 | |
| 191 | int ccw_device_test_sense_data(struct ccw_device *cdev) |
| 192 | { |
| 193 | return cdev->id.cu_type == cdev->private->senseid.cu_type && |
| 194 | cdev->id.cu_model == cdev->private->senseid.cu_model && |
| 195 | cdev->id.dev_type == cdev->private->senseid.dev_type && |
| 196 | cdev->id.dev_model == cdev->private->senseid.dev_model; |
| 197 | } |
| 198 | |
| 199 | /* |
| 200 | * The machine won't give us any notification by machine check if a chpid has |
| 201 | * been varied online on the SE so we have to find out by magic (i. e. driving |
| 202 | * the channel subsystem to device selection and updating our path masks). |
| 203 | */ |
| 204 | static void |
| 205 | __recover_lost_chpids(struct subchannel *sch, int old_lpm) |
| 206 | { |
| 207 | int mask, i; |
| 208 | struct chp_id chpid; |
| 209 | |
| 210 | chp_id_init(&chpid); |
| 211 | for (i = 0; i<8; i++) { |
| 212 | mask = 0x80 >> i; |
| 213 | if (!(sch->lpm & mask)) |
| 214 | continue; |
| 215 | if (old_lpm & mask) |
| 216 | continue; |
| 217 | chpid.id = sch->schib.pmcw.chpid[i]; |
| 218 | if (!chp_is_registered(chpid)) |
| 219 | css_schedule_eval_all(); |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | /* |
| 224 | * Stop device recognition. |
| 225 | */ |
| 226 | static void |
| 227 | ccw_device_recog_done(struct ccw_device *cdev, int state) |
| 228 | { |
| 229 | struct subchannel *sch; |
| 230 | int old_lpm; |
| 231 | |
| 232 | sch = to_subchannel(cdev->dev.parent); |
| 233 | |
| 234 | if (cio_disable_subchannel(sch)) |
| 235 | state = DEV_STATE_NOT_OPER; |
| 236 | /* |
| 237 | * Now that we tried recognition, we have performed device selection |
| 238 | * through ssch() and the path information is up to date. |
| 239 | */ |
| 240 | old_lpm = sch->lpm; |
| 241 | |
| 242 | /* Check since device may again have become not operational. */ |
| 243 | if (cio_update_schib(sch)) |
| 244 | state = DEV_STATE_NOT_OPER; |
| 245 | else |
| 246 | sch->lpm = sch->schib.pmcw.pam & sch->opm; |
| 247 | |
| 248 | if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID) |
| 249 | /* Force reprobe on all chpids. */ |
| 250 | old_lpm = 0; |
| 251 | if (sch->lpm != old_lpm) |
| 252 | __recover_lost_chpids(sch, old_lpm); |
| 253 | if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID && |
| 254 | (state == DEV_STATE_NOT_OPER || state == DEV_STATE_BOXED)) { |
| 255 | cdev->private->flags.recog_done = 1; |
| 256 | cdev->private->state = DEV_STATE_DISCONNECTED; |
| 257 | wake_up(&cdev->private->wait_q); |
| 258 | return; |
| 259 | } |
| 260 | if (cdev->private->flags.resuming) { |
| 261 | cdev->private->state = state; |
| 262 | cdev->private->flags.recog_done = 1; |
| 263 | wake_up(&cdev->private->wait_q); |
| 264 | return; |
| 265 | } |
| 266 | switch (state) { |
| 267 | case DEV_STATE_NOT_OPER: |
| 268 | break; |
| 269 | case DEV_STATE_OFFLINE: |
| 270 | if (!cdev->online) { |
| 271 | ccw_device_update_sense_data(cdev); |
| 272 | break; |
| 273 | } |
| 274 | cdev->private->state = DEV_STATE_OFFLINE; |
| 275 | cdev->private->flags.recog_done = 1; |
| 276 | if (ccw_device_test_sense_data(cdev)) { |
| 277 | cdev->private->flags.donotify = 1; |
| 278 | ccw_device_online(cdev); |
| 279 | wake_up(&cdev->private->wait_q); |
| 280 | } else { |
| 281 | ccw_device_update_sense_data(cdev); |
| 282 | ccw_device_sched_todo(cdev, CDEV_TODO_REBIND); |
| 283 | } |
| 284 | return; |
| 285 | case DEV_STATE_BOXED: |
| 286 | if (cdev->id.cu_type != 0) { /* device was recognized before */ |
| 287 | cdev->private->flags.recog_done = 1; |
| 288 | cdev->private->state = DEV_STATE_BOXED; |
| 289 | wake_up(&cdev->private->wait_q); |
| 290 | return; |
| 291 | } |
| 292 | break; |
| 293 | } |
| 294 | cdev->private->state = state; |
| 295 | io_subchannel_recog_done(cdev); |
| 296 | wake_up(&cdev->private->wait_q); |
| 297 | } |
| 298 | |
| 299 | /* |
| 300 | * Function called from device_id.c after sense id has completed. |
| 301 | */ |
| 302 | void |
| 303 | ccw_device_sense_id_done(struct ccw_device *cdev, int err) |
| 304 | { |
| 305 | switch (err) { |
| 306 | case 0: |
| 307 | ccw_device_recog_done(cdev, DEV_STATE_OFFLINE); |
| 308 | break; |
| 309 | case -ETIME: /* Sense id stopped by timeout. */ |
| 310 | ccw_device_recog_done(cdev, DEV_STATE_BOXED); |
| 311 | break; |
| 312 | default: |
| 313 | ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER); |
| 314 | break; |
| 315 | } |
| 316 | } |
| 317 | |
| 318 | /** |
| 319 | * ccw_device_notify() - inform the device's driver about an event |
| 320 | * @cdev: device for which an event occurred |
| 321 | * @event: event that occurred |
| 322 | * |
| 323 | * Returns: |
| 324 | * -%EINVAL if the device is offline or has no driver. |
| 325 | * -%EOPNOTSUPP if the device's driver has no notifier registered. |
| 326 | * %NOTIFY_OK if the driver wants to keep the device. |
| 327 | * %NOTIFY_BAD if the driver doesn't want to keep the device. |
| 328 | */ |
| 329 | int ccw_device_notify(struct ccw_device *cdev, int event) |
| 330 | { |
| 331 | int ret = -EINVAL; |
| 332 | |
| 333 | if (!cdev->drv) |
| 334 | goto out; |
| 335 | if (!cdev->online) |
| 336 | goto out; |
| 337 | CIO_MSG_EVENT(2, "notify called for 0.%x.%04x, event=%d\n", |
| 338 | cdev->private->dev_id.ssid, cdev->private->dev_id.devno, |
| 339 | event); |
| 340 | if (!cdev->drv->notify) { |
| 341 | ret = -EOPNOTSUPP; |
| 342 | goto out; |
| 343 | } |
| 344 | if (cdev->drv->notify(cdev, event)) |
| 345 | ret = NOTIFY_OK; |
| 346 | else |
| 347 | ret = NOTIFY_BAD; |
| 348 | out: |
| 349 | return ret; |
| 350 | } |
| 351 | |
| 352 | static void ccw_device_oper_notify(struct ccw_device *cdev) |
| 353 | { |
| 354 | struct subchannel *sch = to_subchannel(cdev->dev.parent); |
| 355 | |
| 356 | if (ccw_device_notify(cdev, CIO_OPER) == NOTIFY_OK) { |
| 357 | /* Reenable channel measurements, if needed. */ |
| 358 | ccw_device_sched_todo(cdev, CDEV_TODO_ENABLE_CMF); |
| 359 | /* Save indication for new paths. */ |
| 360 | cdev->private->path_new_mask = sch->vpm; |
| 361 | return; |
| 362 | } |
| 363 | /* Driver doesn't want device back. */ |
| 364 | ccw_device_set_notoper(cdev); |
| 365 | ccw_device_sched_todo(cdev, CDEV_TODO_REBIND); |
| 366 | } |
| 367 | |
| 368 | /* |
| 369 | * Finished with online/offline processing. |
| 370 | */ |
| 371 | static void |
| 372 | ccw_device_done(struct ccw_device *cdev, int state) |
| 373 | { |
| 374 | struct subchannel *sch; |
| 375 | |
| 376 | sch = to_subchannel(cdev->dev.parent); |
| 377 | |
| 378 | ccw_device_set_timeout(cdev, 0); |
| 379 | |
| 380 | if (state != DEV_STATE_ONLINE) |
| 381 | cio_disable_subchannel(sch); |
| 382 | |
| 383 | /* Reset device status. */ |
| 384 | memset(&cdev->private->irb, 0, sizeof(struct irb)); |
| 385 | |
| 386 | cdev->private->state = state; |
| 387 | |
| 388 | switch (state) { |
| 389 | case DEV_STATE_BOXED: |
| 390 | CIO_MSG_EVENT(0, "Boxed device %04x on subchannel %04x\n", |
| 391 | cdev->private->dev_id.devno, sch->schid.sch_no); |
| 392 | if (cdev->online && |
| 393 | ccw_device_notify(cdev, CIO_BOXED) != NOTIFY_OK) |
| 394 | ccw_device_sched_todo(cdev, CDEV_TODO_UNREG); |
| 395 | cdev->private->flags.donotify = 0; |
| 396 | break; |
| 397 | case DEV_STATE_NOT_OPER: |
| 398 | CIO_MSG_EVENT(0, "Device %04x gone on subchannel %04x\n", |
| 399 | cdev->private->dev_id.devno, sch->schid.sch_no); |
| 400 | if (ccw_device_notify(cdev, CIO_GONE) != NOTIFY_OK) |
| 401 | ccw_device_sched_todo(cdev, CDEV_TODO_UNREG); |
| 402 | else |
| 403 | ccw_device_set_disconnected(cdev); |
| 404 | cdev->private->flags.donotify = 0; |
| 405 | break; |
| 406 | case DEV_STATE_DISCONNECTED: |
| 407 | CIO_MSG_EVENT(0, "Disconnected device %04x on subchannel " |
| 408 | "%04x\n", cdev->private->dev_id.devno, |
| 409 | sch->schid.sch_no); |
| 410 | if (ccw_device_notify(cdev, CIO_NO_PATH) != NOTIFY_OK) { |
| 411 | cdev->private->state = DEV_STATE_NOT_OPER; |
| 412 | ccw_device_sched_todo(cdev, CDEV_TODO_UNREG); |
| 413 | } else |
| 414 | ccw_device_set_disconnected(cdev); |
| 415 | cdev->private->flags.donotify = 0; |
| 416 | break; |
| 417 | default: |
| 418 | break; |
| 419 | } |
| 420 | |
| 421 | if (cdev->private->flags.donotify) { |
| 422 | cdev->private->flags.donotify = 0; |
| 423 | ccw_device_oper_notify(cdev); |
| 424 | } |
| 425 | wake_up(&cdev->private->wait_q); |
| 426 | } |
| 427 | |
| 428 | /* |
| 429 | * Start device recognition. |
| 430 | */ |
| 431 | void ccw_device_recognition(struct ccw_device *cdev) |
| 432 | { |
| 433 | struct subchannel *sch = to_subchannel(cdev->dev.parent); |
| 434 | |
| 435 | /* |
| 436 | * We used to start here with a sense pgid to find out whether a device |
| 437 | * is locked by someone else. Unfortunately, the sense pgid command |
| 438 | * code has other meanings on devices predating the path grouping |
| 439 | * algorithm, so we start with sense id and box the device after an |
| 440 | * timeout (or if sense pgid during path verification detects the device |
| 441 | * is locked, as may happen on newer devices). |
| 442 | */ |
| 443 | cdev->private->flags.recog_done = 0; |
| 444 | cdev->private->state = DEV_STATE_SENSE_ID; |
| 445 | if (cio_enable_subchannel(sch, (u32) (addr_t) sch)) { |
| 446 | ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER); |
| 447 | return; |
| 448 | } |
| 449 | ccw_device_sense_id_start(cdev); |
| 450 | } |
| 451 | |
| 452 | /* |
| 453 | * Handle events for states that use the ccw request infrastructure. |
| 454 | */ |
| 455 | static void ccw_device_request_event(struct ccw_device *cdev, enum dev_event e) |
| 456 | { |
| 457 | switch (e) { |
| 458 | case DEV_EVENT_NOTOPER: |
| 459 | ccw_request_notoper(cdev); |
| 460 | break; |
| 461 | case DEV_EVENT_INTERRUPT: |
| 462 | ccw_request_handler(cdev); |
| 463 | break; |
| 464 | case DEV_EVENT_TIMEOUT: |
| 465 | ccw_request_timeout(cdev); |
| 466 | break; |
| 467 | default: |
| 468 | break; |
| 469 | } |
| 470 | } |
| 471 | |
| 472 | static void ccw_device_report_path_events(struct ccw_device *cdev) |
| 473 | { |
| 474 | struct subchannel *sch = to_subchannel(cdev->dev.parent); |
| 475 | int path_event[8]; |
| 476 | int chp, mask; |
| 477 | |
| 478 | for (chp = 0, mask = 0x80; chp < 8; chp++, mask >>= 1) { |
| 479 | path_event[chp] = PE_NONE; |
| 480 | if (mask & cdev->private->path_gone_mask & ~(sch->vpm)) |
| 481 | path_event[chp] |= PE_PATH_GONE; |
| 482 | if (mask & cdev->private->path_new_mask & sch->vpm) |
| 483 | path_event[chp] |= PE_PATH_AVAILABLE; |
| 484 | if (mask & cdev->private->pgid_reset_mask & sch->vpm) |
| 485 | path_event[chp] |= PE_PATHGROUP_ESTABLISHED; |
| 486 | } |
| 487 | if (cdev->online && cdev->drv->path_event) |
| 488 | cdev->drv->path_event(cdev, path_event); |
| 489 | } |
| 490 | |
| 491 | static void ccw_device_reset_path_events(struct ccw_device *cdev) |
| 492 | { |
| 493 | cdev->private->path_gone_mask = 0; |
| 494 | cdev->private->path_new_mask = 0; |
| 495 | cdev->private->pgid_reset_mask = 0; |
| 496 | } |
| 497 | |
| 498 | static void create_fake_irb(struct irb *irb, int type) |
| 499 | { |
| 500 | memset(irb, 0, sizeof(*irb)); |
| 501 | if (type == FAKE_CMD_IRB) { |
| 502 | struct cmd_scsw *scsw = &irb->scsw.cmd; |
| 503 | scsw->cc = 1; |
| 504 | scsw->fctl = SCSW_FCTL_START_FUNC; |
| 505 | scsw->actl = SCSW_ACTL_START_PEND; |
| 506 | scsw->stctl = SCSW_STCTL_STATUS_PEND; |
| 507 | } else if (type == FAKE_TM_IRB) { |
| 508 | struct tm_scsw *scsw = &irb->scsw.tm; |
| 509 | scsw->x = 1; |
| 510 | scsw->cc = 1; |
| 511 | scsw->fctl = SCSW_FCTL_START_FUNC; |
| 512 | scsw->actl = SCSW_ACTL_START_PEND; |
| 513 | scsw->stctl = SCSW_STCTL_STATUS_PEND; |
| 514 | } |
| 515 | } |
| 516 | |
| 517 | void ccw_device_verify_done(struct ccw_device *cdev, int err) |
| 518 | { |
| 519 | struct subchannel *sch; |
| 520 | |
| 521 | sch = to_subchannel(cdev->dev.parent); |
| 522 | /* Update schib - pom may have changed. */ |
| 523 | if (cio_update_schib(sch)) { |
| 524 | err = -ENODEV; |
| 525 | goto callback; |
| 526 | } |
| 527 | /* Update lpm with verified path mask. */ |
| 528 | sch->lpm = sch->vpm; |
| 529 | /* Repeat path verification? */ |
| 530 | if (cdev->private->flags.doverify) { |
| 531 | ccw_device_verify_start(cdev); |
| 532 | return; |
| 533 | } |
| 534 | callback: |
| 535 | switch (err) { |
| 536 | case 0: |
| 537 | ccw_device_done(cdev, DEV_STATE_ONLINE); |
| 538 | /* Deliver fake irb to device driver, if needed. */ |
| 539 | if (cdev->private->flags.fake_irb) { |
| 540 | create_fake_irb(&cdev->private->irb, |
| 541 | cdev->private->flags.fake_irb); |
| 542 | cdev->private->flags.fake_irb = 0; |
| 543 | if (cdev->handler) |
| 544 | cdev->handler(cdev, cdev->private->intparm, |
| 545 | &cdev->private->irb); |
| 546 | memset(&cdev->private->irb, 0, sizeof(struct irb)); |
| 547 | } |
| 548 | ccw_device_report_path_events(cdev); |
| 549 | break; |
| 550 | case -ETIME: |
| 551 | case -EUSERS: |
| 552 | /* Reset oper notify indication after verify error. */ |
| 553 | cdev->private->flags.donotify = 0; |
| 554 | ccw_device_done(cdev, DEV_STATE_BOXED); |
| 555 | break; |
| 556 | case -EACCES: |
| 557 | /* Reset oper notify indication after verify error. */ |
| 558 | cdev->private->flags.donotify = 0; |
| 559 | ccw_device_done(cdev, DEV_STATE_DISCONNECTED); |
| 560 | break; |
| 561 | default: |
| 562 | /* Reset oper notify indication after verify error. */ |
| 563 | cdev->private->flags.donotify = 0; |
| 564 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); |
| 565 | break; |
| 566 | } |
| 567 | ccw_device_reset_path_events(cdev); |
| 568 | } |
| 569 | |
| 570 | /* |
| 571 | * Get device online. |
| 572 | */ |
| 573 | int |
| 574 | ccw_device_online(struct ccw_device *cdev) |
| 575 | { |
| 576 | struct subchannel *sch; |
| 577 | int ret; |
| 578 | |
| 579 | if ((cdev->private->state != DEV_STATE_OFFLINE) && |
| 580 | (cdev->private->state != DEV_STATE_BOXED)) |
| 581 | return -EINVAL; |
| 582 | sch = to_subchannel(cdev->dev.parent); |
| 583 | ret = cio_enable_subchannel(sch, (u32)(addr_t)sch); |
| 584 | if (ret != 0) { |
| 585 | /* Couldn't enable the subchannel for i/o. Sick device. */ |
| 586 | if (ret == -ENODEV) |
| 587 | dev_fsm_event(cdev, DEV_EVENT_NOTOPER); |
| 588 | return ret; |
| 589 | } |
| 590 | /* Start initial path verification. */ |
| 591 | cdev->private->state = DEV_STATE_VERIFY; |
| 592 | ccw_device_verify_start(cdev); |
| 593 | return 0; |
| 594 | } |
| 595 | |
| 596 | void |
| 597 | ccw_device_disband_done(struct ccw_device *cdev, int err) |
| 598 | { |
| 599 | switch (err) { |
| 600 | case 0: |
| 601 | ccw_device_done(cdev, DEV_STATE_OFFLINE); |
| 602 | break; |
| 603 | case -ETIME: |
| 604 | ccw_device_done(cdev, DEV_STATE_BOXED); |
| 605 | break; |
| 606 | default: |
| 607 | cdev->private->flags.donotify = 0; |
| 608 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); |
| 609 | break; |
| 610 | } |
| 611 | } |
| 612 | |
| 613 | /* |
| 614 | * Shutdown device. |
| 615 | */ |
| 616 | int |
| 617 | ccw_device_offline(struct ccw_device *cdev) |
| 618 | { |
| 619 | struct subchannel *sch; |
| 620 | |
| 621 | /* Allow ccw_device_offline while disconnected. */ |
| 622 | if (cdev->private->state == DEV_STATE_DISCONNECTED || |
| 623 | cdev->private->state == DEV_STATE_NOT_OPER) { |
| 624 | cdev->private->flags.donotify = 0; |
| 625 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); |
| 626 | return 0; |
| 627 | } |
| 628 | if (cdev->private->state == DEV_STATE_BOXED) { |
| 629 | ccw_device_done(cdev, DEV_STATE_BOXED); |
| 630 | return 0; |
| 631 | } |
| 632 | if (ccw_device_is_orphan(cdev)) { |
| 633 | ccw_device_done(cdev, DEV_STATE_OFFLINE); |
| 634 | return 0; |
| 635 | } |
| 636 | sch = to_subchannel(cdev->dev.parent); |
| 637 | if (cio_update_schib(sch)) |
| 638 | return -ENODEV; |
| 639 | if (scsw_actl(&sch->schib.scsw) != 0) |
| 640 | return -EBUSY; |
| 641 | if (cdev->private->state != DEV_STATE_ONLINE) |
| 642 | return -EINVAL; |
| 643 | /* Are we doing path grouping? */ |
| 644 | if (!cdev->private->flags.pgroup) { |
| 645 | /* No, set state offline immediately. */ |
| 646 | ccw_device_done(cdev, DEV_STATE_OFFLINE); |
| 647 | return 0; |
| 648 | } |
| 649 | /* Start Set Path Group commands. */ |
| 650 | cdev->private->state = DEV_STATE_DISBAND_PGID; |
| 651 | ccw_device_disband_start(cdev); |
| 652 | return 0; |
| 653 | } |
| 654 | |
| 655 | /* |
| 656 | * Handle not operational event in non-special state. |
| 657 | */ |
| 658 | static void ccw_device_generic_notoper(struct ccw_device *cdev, |
| 659 | enum dev_event dev_event) |
| 660 | { |
| 661 | if (ccw_device_notify(cdev, CIO_GONE) != NOTIFY_OK) |
| 662 | ccw_device_sched_todo(cdev, CDEV_TODO_UNREG); |
| 663 | else |
| 664 | ccw_device_set_disconnected(cdev); |
| 665 | } |
| 666 | |
| 667 | /* |
| 668 | * Handle path verification event in offline state. |
| 669 | */ |
| 670 | static void ccw_device_offline_verify(struct ccw_device *cdev, |
| 671 | enum dev_event dev_event) |
| 672 | { |
| 673 | struct subchannel *sch = to_subchannel(cdev->dev.parent); |
| 674 | |
| 675 | css_schedule_eval(sch->schid); |
| 676 | } |
| 677 | |
| 678 | /* |
| 679 | * Handle path verification event. |
| 680 | */ |
| 681 | static void |
| 682 | ccw_device_online_verify(struct ccw_device *cdev, enum dev_event dev_event) |
| 683 | { |
| 684 | struct subchannel *sch; |
| 685 | |
| 686 | if (cdev->private->state == DEV_STATE_W4SENSE) { |
| 687 | cdev->private->flags.doverify = 1; |
| 688 | return; |
| 689 | } |
| 690 | sch = to_subchannel(cdev->dev.parent); |
| 691 | /* |
| 692 | * Since we might not just be coming from an interrupt from the |
| 693 | * subchannel we have to update the schib. |
| 694 | */ |
| 695 | if (cio_update_schib(sch)) { |
| 696 | ccw_device_verify_done(cdev, -ENODEV); |
| 697 | return; |
| 698 | } |
| 699 | |
| 700 | if (scsw_actl(&sch->schib.scsw) != 0 || |
| 701 | (scsw_stctl(&sch->schib.scsw) & SCSW_STCTL_STATUS_PEND) || |
| 702 | (scsw_stctl(&cdev->private->irb.scsw) & SCSW_STCTL_STATUS_PEND)) { |
| 703 | /* |
| 704 | * No final status yet or final status not yet delivered |
| 705 | * to the device driver. Can't do path verification now, |
| 706 | * delay until final status was delivered. |
| 707 | */ |
| 708 | cdev->private->flags.doverify = 1; |
| 709 | return; |
| 710 | } |
| 711 | /* Device is idle, we can do the path verification. */ |
| 712 | cdev->private->state = DEV_STATE_VERIFY; |
| 713 | ccw_device_verify_start(cdev); |
| 714 | } |
| 715 | |
| 716 | /* |
| 717 | * Handle path verification event in boxed state. |
| 718 | */ |
| 719 | static void ccw_device_boxed_verify(struct ccw_device *cdev, |
| 720 | enum dev_event dev_event) |
| 721 | { |
| 722 | struct subchannel *sch = to_subchannel(cdev->dev.parent); |
| 723 | |
| 724 | if (cdev->online) { |
| 725 | if (cio_enable_subchannel(sch, (u32) (addr_t) sch)) |
| 726 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); |
| 727 | else |
| 728 | ccw_device_online_verify(cdev, dev_event); |
| 729 | } else |
| 730 | css_schedule_eval(sch->schid); |
| 731 | } |
| 732 | |
| 733 | /* |
| 734 | * Got an interrupt for a normal io (state online). |
| 735 | */ |
| 736 | static void |
| 737 | ccw_device_irq(struct ccw_device *cdev, enum dev_event dev_event) |
| 738 | { |
| 739 | struct irb *irb; |
| 740 | int is_cmd; |
| 741 | |
| 742 | irb = (struct irb *)&S390_lowcore.irb; |
| 743 | is_cmd = !scsw_is_tm(&irb->scsw); |
| 744 | /* Check for unsolicited interrupt. */ |
| 745 | if (!scsw_is_solicited(&irb->scsw)) { |
| 746 | if (is_cmd && (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) && |
| 747 | !irb->esw.esw0.erw.cons) { |
| 748 | /* Unit check but no sense data. Need basic sense. */ |
| 749 | if (ccw_device_do_sense(cdev, irb) != 0) |
| 750 | goto call_handler_unsol; |
| 751 | memcpy(&cdev->private->irb, irb, sizeof(struct irb)); |
| 752 | cdev->private->state = DEV_STATE_W4SENSE; |
| 753 | cdev->private->intparm = 0; |
| 754 | return; |
| 755 | } |
| 756 | call_handler_unsol: |
| 757 | if (cdev->handler) |
| 758 | cdev->handler (cdev, 0, irb); |
| 759 | if (cdev->private->flags.doverify) |
| 760 | ccw_device_online_verify(cdev, 0); |
| 761 | return; |
| 762 | } |
| 763 | /* Accumulate status and find out if a basic sense is needed. */ |
| 764 | ccw_device_accumulate_irb(cdev, irb); |
| 765 | if (is_cmd && cdev->private->flags.dosense) { |
| 766 | if (ccw_device_do_sense(cdev, irb) == 0) { |
| 767 | cdev->private->state = DEV_STATE_W4SENSE; |
| 768 | } |
| 769 | return; |
| 770 | } |
| 771 | /* Call the handler. */ |
| 772 | if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify) |
| 773 | /* Start delayed path verification. */ |
| 774 | ccw_device_online_verify(cdev, 0); |
| 775 | } |
| 776 | |
| 777 | /* |
| 778 | * Got an timeout in online state. |
| 779 | */ |
| 780 | static void |
| 781 | ccw_device_online_timeout(struct ccw_device *cdev, enum dev_event dev_event) |
| 782 | { |
| 783 | int ret; |
| 784 | |
| 785 | ccw_device_set_timeout(cdev, 0); |
| 786 | cdev->private->iretry = 255; |
| 787 | ret = ccw_device_cancel_halt_clear(cdev); |
| 788 | if (ret == -EBUSY) { |
| 789 | ccw_device_set_timeout(cdev, 3*HZ); |
| 790 | cdev->private->state = DEV_STATE_TIMEOUT_KILL; |
| 791 | return; |
| 792 | } |
| 793 | if (ret) |
| 794 | dev_fsm_event(cdev, DEV_EVENT_NOTOPER); |
| 795 | else if (cdev->handler) |
| 796 | cdev->handler(cdev, cdev->private->intparm, |
| 797 | ERR_PTR(-ETIMEDOUT)); |
| 798 | } |
| 799 | |
| 800 | /* |
| 801 | * Got an interrupt for a basic sense. |
| 802 | */ |
| 803 | static void |
| 804 | ccw_device_w4sense(struct ccw_device *cdev, enum dev_event dev_event) |
| 805 | { |
| 806 | struct irb *irb; |
| 807 | |
| 808 | irb = (struct irb *)&S390_lowcore.irb; |
| 809 | /* Check for unsolicited interrupt. */ |
| 810 | if (scsw_stctl(&irb->scsw) == |
| 811 | (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) { |
| 812 | if (scsw_cc(&irb->scsw) == 1) |
| 813 | /* Basic sense hasn't started. Try again. */ |
| 814 | ccw_device_do_sense(cdev, irb); |
| 815 | else { |
| 816 | CIO_MSG_EVENT(0, "0.%x.%04x: unsolicited " |
| 817 | "interrupt during w4sense...\n", |
| 818 | cdev->private->dev_id.ssid, |
| 819 | cdev->private->dev_id.devno); |
| 820 | if (cdev->handler) |
| 821 | cdev->handler (cdev, 0, irb); |
| 822 | } |
| 823 | return; |
| 824 | } |
| 825 | /* |
| 826 | * Check if a halt or clear has been issued in the meanwhile. If yes, |
| 827 | * only deliver the halt/clear interrupt to the device driver as if it |
| 828 | * had killed the original request. |
| 829 | */ |
| 830 | if (scsw_fctl(&irb->scsw) & |
| 831 | (SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_HALT_FUNC)) { |
| 832 | cdev->private->flags.dosense = 0; |
| 833 | memset(&cdev->private->irb, 0, sizeof(struct irb)); |
| 834 | ccw_device_accumulate_irb(cdev, irb); |
| 835 | goto call_handler; |
| 836 | } |
| 837 | /* Add basic sense info to irb. */ |
| 838 | ccw_device_accumulate_basic_sense(cdev, irb); |
| 839 | if (cdev->private->flags.dosense) { |
| 840 | /* Another basic sense is needed. */ |
| 841 | ccw_device_do_sense(cdev, irb); |
| 842 | return; |
| 843 | } |
| 844 | call_handler: |
| 845 | cdev->private->state = DEV_STATE_ONLINE; |
| 846 | /* In case sensing interfered with setting the device online */ |
| 847 | wake_up(&cdev->private->wait_q); |
| 848 | /* Call the handler. */ |
| 849 | if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify) |
| 850 | /* Start delayed path verification. */ |
| 851 | ccw_device_online_verify(cdev, 0); |
| 852 | } |
| 853 | |
| 854 | static void |
| 855 | ccw_device_killing_irq(struct ccw_device *cdev, enum dev_event dev_event) |
| 856 | { |
| 857 | ccw_device_set_timeout(cdev, 0); |
| 858 | /* Start delayed path verification. */ |
| 859 | ccw_device_online_verify(cdev, 0); |
| 860 | /* OK, i/o is dead now. Call interrupt handler. */ |
| 861 | if (cdev->handler) |
| 862 | cdev->handler(cdev, cdev->private->intparm, |
| 863 | ERR_PTR(-EIO)); |
| 864 | } |
| 865 | |
| 866 | static void |
| 867 | ccw_device_killing_timeout(struct ccw_device *cdev, enum dev_event dev_event) |
| 868 | { |
| 869 | int ret; |
| 870 | |
| 871 | ret = ccw_device_cancel_halt_clear(cdev); |
| 872 | if (ret == -EBUSY) { |
| 873 | ccw_device_set_timeout(cdev, 3*HZ); |
| 874 | return; |
| 875 | } |
| 876 | /* Start delayed path verification. */ |
| 877 | ccw_device_online_verify(cdev, 0); |
| 878 | if (cdev->handler) |
| 879 | cdev->handler(cdev, cdev->private->intparm, |
| 880 | ERR_PTR(-EIO)); |
| 881 | } |
| 882 | |
| 883 | void ccw_device_kill_io(struct ccw_device *cdev) |
| 884 | { |
| 885 | int ret; |
| 886 | |
| 887 | cdev->private->iretry = 255; |
| 888 | ret = ccw_device_cancel_halt_clear(cdev); |
| 889 | if (ret == -EBUSY) { |
| 890 | ccw_device_set_timeout(cdev, 3*HZ); |
| 891 | cdev->private->state = DEV_STATE_TIMEOUT_KILL; |
| 892 | return; |
| 893 | } |
| 894 | /* Start delayed path verification. */ |
| 895 | ccw_device_online_verify(cdev, 0); |
| 896 | if (cdev->handler) |
| 897 | cdev->handler(cdev, cdev->private->intparm, |
| 898 | ERR_PTR(-EIO)); |
| 899 | } |
| 900 | |
| 901 | static void |
| 902 | ccw_device_delay_verify(struct ccw_device *cdev, enum dev_event dev_event) |
| 903 | { |
| 904 | /* Start verification after current task finished. */ |
| 905 | cdev->private->flags.doverify = 1; |
| 906 | } |
| 907 | |
| 908 | static void |
| 909 | ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event) |
| 910 | { |
| 911 | struct subchannel *sch; |
| 912 | |
| 913 | sch = to_subchannel(cdev->dev.parent); |
| 914 | if (cio_enable_subchannel(sch, (u32)(addr_t)sch) != 0) |
| 915 | /* Couldn't enable the subchannel for i/o. Sick device. */ |
| 916 | return; |
| 917 | cdev->private->state = DEV_STATE_DISCONNECTED_SENSE_ID; |
| 918 | ccw_device_sense_id_start(cdev); |
| 919 | } |
| 920 | |
| 921 | void ccw_device_trigger_reprobe(struct ccw_device *cdev) |
| 922 | { |
| 923 | struct subchannel *sch; |
| 924 | |
| 925 | if (cdev->private->state != DEV_STATE_DISCONNECTED) |
| 926 | return; |
| 927 | |
| 928 | sch = to_subchannel(cdev->dev.parent); |
| 929 | /* Update some values. */ |
| 930 | if (cio_update_schib(sch)) |
| 931 | return; |
| 932 | /* |
| 933 | * The pim, pam, pom values may not be accurate, but they are the best |
| 934 | * we have before performing device selection :/ |
| 935 | */ |
| 936 | sch->lpm = sch->schib.pmcw.pam & sch->opm; |
| 937 | /* |
| 938 | * Use the initial configuration since we can't be shure that the old |
| 939 | * paths are valid. |
| 940 | */ |
| 941 | io_subchannel_init_config(sch); |
| 942 | if (cio_commit_config(sch)) |
| 943 | return; |
| 944 | |
| 945 | /* We should also udate ssd info, but this has to wait. */ |
| 946 | /* Check if this is another device which appeared on the same sch. */ |
| 947 | if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) |
| 948 | css_schedule_eval(sch->schid); |
| 949 | else |
| 950 | ccw_device_start_id(cdev, 0); |
| 951 | } |
| 952 | |
| 953 | static void ccw_device_disabled_irq(struct ccw_device *cdev, |
| 954 | enum dev_event dev_event) |
| 955 | { |
| 956 | struct subchannel *sch; |
| 957 | |
| 958 | sch = to_subchannel(cdev->dev.parent); |
| 959 | /* |
| 960 | * An interrupt in a disabled state means a previous disable was not |
| 961 | * successful - should not happen, but we try to disable again. |
| 962 | */ |
| 963 | cio_disable_subchannel(sch); |
| 964 | } |
| 965 | |
| 966 | static void |
| 967 | ccw_device_change_cmfstate(struct ccw_device *cdev, enum dev_event dev_event) |
| 968 | { |
| 969 | retry_set_schib(cdev); |
| 970 | cdev->private->state = DEV_STATE_ONLINE; |
| 971 | dev_fsm_event(cdev, dev_event); |
| 972 | } |
| 973 | |
| 974 | static void ccw_device_update_cmfblock(struct ccw_device *cdev, |
| 975 | enum dev_event dev_event) |
| 976 | { |
| 977 | cmf_retry_copy_block(cdev); |
| 978 | cdev->private->state = DEV_STATE_ONLINE; |
| 979 | dev_fsm_event(cdev, dev_event); |
| 980 | } |
| 981 | |
| 982 | static void |
| 983 | ccw_device_quiesce_done(struct ccw_device *cdev, enum dev_event dev_event) |
| 984 | { |
| 985 | ccw_device_set_timeout(cdev, 0); |
| 986 | cdev->private->state = DEV_STATE_NOT_OPER; |
| 987 | wake_up(&cdev->private->wait_q); |
| 988 | } |
| 989 | |
| 990 | static void |
| 991 | ccw_device_quiesce_timeout(struct ccw_device *cdev, enum dev_event dev_event) |
| 992 | { |
| 993 | int ret; |
| 994 | |
| 995 | ret = ccw_device_cancel_halt_clear(cdev); |
| 996 | if (ret == -EBUSY) { |
| 997 | ccw_device_set_timeout(cdev, HZ/10); |
| 998 | } else { |
| 999 | cdev->private->state = DEV_STATE_NOT_OPER; |
| 1000 | wake_up(&cdev->private->wait_q); |
| 1001 | } |
| 1002 | } |
| 1003 | |
| 1004 | /* |
| 1005 | * No operation action. This is used e.g. to ignore a timeout event in |
| 1006 | * state offline. |
| 1007 | */ |
| 1008 | static void |
| 1009 | ccw_device_nop(struct ccw_device *cdev, enum dev_event dev_event) |
| 1010 | { |
| 1011 | } |
| 1012 | |
| 1013 | /* |
| 1014 | * device statemachine |
| 1015 | */ |
| 1016 | fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = { |
| 1017 | [DEV_STATE_NOT_OPER] = { |
| 1018 | [DEV_EVENT_NOTOPER] = ccw_device_nop, |
| 1019 | [DEV_EVENT_INTERRUPT] = ccw_device_disabled_irq, |
| 1020 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, |
| 1021 | [DEV_EVENT_VERIFY] = ccw_device_nop, |
| 1022 | }, |
| 1023 | [DEV_STATE_SENSE_PGID] = { |
| 1024 | [DEV_EVENT_NOTOPER] = ccw_device_request_event, |
| 1025 | [DEV_EVENT_INTERRUPT] = ccw_device_request_event, |
| 1026 | [DEV_EVENT_TIMEOUT] = ccw_device_request_event, |
| 1027 | [DEV_EVENT_VERIFY] = ccw_device_nop, |
| 1028 | }, |
| 1029 | [DEV_STATE_SENSE_ID] = { |
| 1030 | [DEV_EVENT_NOTOPER] = ccw_device_request_event, |
| 1031 | [DEV_EVENT_INTERRUPT] = ccw_device_request_event, |
| 1032 | [DEV_EVENT_TIMEOUT] = ccw_device_request_event, |
| 1033 | [DEV_EVENT_VERIFY] = ccw_device_nop, |
| 1034 | }, |
| 1035 | [DEV_STATE_OFFLINE] = { |
| 1036 | [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, |
| 1037 | [DEV_EVENT_INTERRUPT] = ccw_device_disabled_irq, |
| 1038 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, |
| 1039 | [DEV_EVENT_VERIFY] = ccw_device_offline_verify, |
| 1040 | }, |
| 1041 | [DEV_STATE_VERIFY] = { |
| 1042 | [DEV_EVENT_NOTOPER] = ccw_device_request_event, |
| 1043 | [DEV_EVENT_INTERRUPT] = ccw_device_request_event, |
| 1044 | [DEV_EVENT_TIMEOUT] = ccw_device_request_event, |
| 1045 | [DEV_EVENT_VERIFY] = ccw_device_delay_verify, |
| 1046 | }, |
| 1047 | [DEV_STATE_ONLINE] = { |
| 1048 | [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, |
| 1049 | [DEV_EVENT_INTERRUPT] = ccw_device_irq, |
| 1050 | [DEV_EVENT_TIMEOUT] = ccw_device_online_timeout, |
| 1051 | [DEV_EVENT_VERIFY] = ccw_device_online_verify, |
| 1052 | }, |
| 1053 | [DEV_STATE_W4SENSE] = { |
| 1054 | [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, |
| 1055 | [DEV_EVENT_INTERRUPT] = ccw_device_w4sense, |
| 1056 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, |
| 1057 | [DEV_EVENT_VERIFY] = ccw_device_online_verify, |
| 1058 | }, |
| 1059 | [DEV_STATE_DISBAND_PGID] = { |
| 1060 | [DEV_EVENT_NOTOPER] = ccw_device_request_event, |
| 1061 | [DEV_EVENT_INTERRUPT] = ccw_device_request_event, |
| 1062 | [DEV_EVENT_TIMEOUT] = ccw_device_request_event, |
| 1063 | [DEV_EVENT_VERIFY] = ccw_device_nop, |
| 1064 | }, |
| 1065 | [DEV_STATE_BOXED] = { |
| 1066 | [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, |
| 1067 | [DEV_EVENT_INTERRUPT] = ccw_device_nop, |
| 1068 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, |
| 1069 | [DEV_EVENT_VERIFY] = ccw_device_boxed_verify, |
| 1070 | }, |
| 1071 | /* states to wait for i/o completion before doing something */ |
| 1072 | [DEV_STATE_TIMEOUT_KILL] = { |
| 1073 | [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, |
| 1074 | [DEV_EVENT_INTERRUPT] = ccw_device_killing_irq, |
| 1075 | [DEV_EVENT_TIMEOUT] = ccw_device_killing_timeout, |
| 1076 | [DEV_EVENT_VERIFY] = ccw_device_nop, //FIXME |
| 1077 | }, |
| 1078 | [DEV_STATE_QUIESCE] = { |
| 1079 | [DEV_EVENT_NOTOPER] = ccw_device_quiesce_done, |
| 1080 | [DEV_EVENT_INTERRUPT] = ccw_device_quiesce_done, |
| 1081 | [DEV_EVENT_TIMEOUT] = ccw_device_quiesce_timeout, |
| 1082 | [DEV_EVENT_VERIFY] = ccw_device_nop, |
| 1083 | }, |
| 1084 | /* special states for devices gone not operational */ |
| 1085 | [DEV_STATE_DISCONNECTED] = { |
| 1086 | [DEV_EVENT_NOTOPER] = ccw_device_nop, |
| 1087 | [DEV_EVENT_INTERRUPT] = ccw_device_start_id, |
| 1088 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, |
| 1089 | [DEV_EVENT_VERIFY] = ccw_device_start_id, |
| 1090 | }, |
| 1091 | [DEV_STATE_DISCONNECTED_SENSE_ID] = { |
| 1092 | [DEV_EVENT_NOTOPER] = ccw_device_request_event, |
| 1093 | [DEV_EVENT_INTERRUPT] = ccw_device_request_event, |
| 1094 | [DEV_EVENT_TIMEOUT] = ccw_device_request_event, |
| 1095 | [DEV_EVENT_VERIFY] = ccw_device_nop, |
| 1096 | }, |
| 1097 | [DEV_STATE_CMFCHANGE] = { |
| 1098 | [DEV_EVENT_NOTOPER] = ccw_device_change_cmfstate, |
| 1099 | [DEV_EVENT_INTERRUPT] = ccw_device_change_cmfstate, |
| 1100 | [DEV_EVENT_TIMEOUT] = ccw_device_change_cmfstate, |
| 1101 | [DEV_EVENT_VERIFY] = ccw_device_change_cmfstate, |
| 1102 | }, |
| 1103 | [DEV_STATE_CMFUPDATE] = { |
| 1104 | [DEV_EVENT_NOTOPER] = ccw_device_update_cmfblock, |
| 1105 | [DEV_EVENT_INTERRUPT] = ccw_device_update_cmfblock, |
| 1106 | [DEV_EVENT_TIMEOUT] = ccw_device_update_cmfblock, |
| 1107 | [DEV_EVENT_VERIFY] = ccw_device_update_cmfblock, |
| 1108 | }, |
| 1109 | [DEV_STATE_STEAL_LOCK] = { |
| 1110 | [DEV_EVENT_NOTOPER] = ccw_device_request_event, |
| 1111 | [DEV_EVENT_INTERRUPT] = ccw_device_request_event, |
| 1112 | [DEV_EVENT_TIMEOUT] = ccw_device_request_event, |
| 1113 | [DEV_EVENT_VERIFY] = ccw_device_nop, |
| 1114 | }, |
| 1115 | }; |
| 1116 | |
| 1117 | EXPORT_SYMBOL_GPL(ccw_device_set_timeout); |