Bradley Grove | 26780d9 | 2013-08-23 10:35:45 -0400 | [diff] [blame^] | 1 | /* |
| 2 | * linux/drivers/scsi/esas2r/esas2r_int.c |
| 3 | * esas2r interrupt handling |
| 4 | * |
| 5 | * Copyright (c) 2001-2013 ATTO Technology, Inc. |
| 6 | * (mailto:linuxdrivers@attotech.com) |
| 7 | */ |
| 8 | /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/ |
| 9 | /* |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; version 2 of the License. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * NO WARRANTY |
| 20 | * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR |
| 21 | * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT |
| 22 | * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, |
| 23 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is |
| 24 | * solely responsible for determining the appropriateness of using and |
| 25 | * distributing the Program and assumes all risks associated with its |
| 26 | * exercise of rights under this Agreement, including but not limited to |
| 27 | * the risks and costs of program errors, damage to or loss of data, |
| 28 | * programs or equipment, and unavailability or interruption of operations. |
| 29 | * |
| 30 | * DISCLAIMER OF LIABILITY |
| 31 | * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY |
| 32 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 33 | * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND |
| 34 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR |
| 35 | * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE |
| 36 | * USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED |
| 37 | * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES |
| 38 | * |
| 39 | * You should have received a copy of the GNU General Public License |
| 40 | * along with this program; if not, write to the Free Software |
| 41 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 42 | */ |
| 43 | /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/ |
| 44 | |
| 45 | #include "esas2r.h" |
| 46 | |
| 47 | /* Local function prototypes */ |
| 48 | static void esas2r_doorbell_interrupt(struct esas2r_adapter *a, u32 doorbell); |
| 49 | static void esas2r_get_outbound_responses(struct esas2r_adapter *a); |
| 50 | static void esas2r_process_bus_reset(struct esas2r_adapter *a); |
| 51 | |
| 52 | /* |
| 53 | * Poll the adapter for interrupts and service them. |
| 54 | * This function handles both legacy interrupts and MSI. |
| 55 | */ |
| 56 | void esas2r_polled_interrupt(struct esas2r_adapter *a) |
| 57 | { |
| 58 | u32 intstat; |
| 59 | u32 doorbell; |
| 60 | |
| 61 | esas2r_disable_chip_interrupts(a); |
| 62 | |
| 63 | intstat = esas2r_read_register_dword(a, MU_INT_STATUS_OUT); |
| 64 | |
| 65 | if (intstat & MU_INTSTAT_POST_OUT) { |
| 66 | /* clear the interrupt */ |
| 67 | |
| 68 | esas2r_write_register_dword(a, MU_OUT_LIST_INT_STAT, |
| 69 | MU_OLIS_INT); |
| 70 | esas2r_flush_register_dword(a, MU_OUT_LIST_INT_STAT); |
| 71 | |
| 72 | esas2r_get_outbound_responses(a); |
| 73 | } |
| 74 | |
| 75 | if (intstat & MU_INTSTAT_DRBL) { |
| 76 | doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT); |
| 77 | if (doorbell != 0) |
| 78 | esas2r_doorbell_interrupt(a, doorbell); |
| 79 | } |
| 80 | |
| 81 | esas2r_enable_chip_interrupts(a); |
| 82 | |
| 83 | if (atomic_read(&a->disable_cnt) == 0) |
| 84 | esas2r_do_deferred_processes(a); |
| 85 | } |
| 86 | |
| 87 | /* |
| 88 | * Legacy and MSI interrupt handlers. Note that the legacy interrupt handler |
| 89 | * schedules a TASKLET to process events, whereas the MSI handler just |
| 90 | * processes interrupt events directly. |
| 91 | */ |
| 92 | irqreturn_t esas2r_interrupt(int irq, void *dev_id) |
| 93 | { |
| 94 | struct esas2r_adapter *a = (struct esas2r_adapter *)dev_id; |
| 95 | |
| 96 | if (!esas2r_adapter_interrupt_pending(a)) |
| 97 | return IRQ_NONE; |
| 98 | |
| 99 | esas2r_lock_set_flags(&a->flags2, AF2_INT_PENDING); |
| 100 | esas2r_schedule_tasklet(a); |
| 101 | |
| 102 | return IRQ_HANDLED; |
| 103 | } |
| 104 | |
| 105 | void esas2r_adapter_interrupt(struct esas2r_adapter *a) |
| 106 | { |
| 107 | u32 doorbell; |
| 108 | |
| 109 | if (likely(a->int_stat & MU_INTSTAT_POST_OUT)) { |
| 110 | /* clear the interrupt */ |
| 111 | esas2r_write_register_dword(a, MU_OUT_LIST_INT_STAT, |
| 112 | MU_OLIS_INT); |
| 113 | esas2r_flush_register_dword(a, MU_OUT_LIST_INT_STAT); |
| 114 | esas2r_get_outbound_responses(a); |
| 115 | } |
| 116 | |
| 117 | if (unlikely(a->int_stat & MU_INTSTAT_DRBL)) { |
| 118 | doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT); |
| 119 | if (doorbell != 0) |
| 120 | esas2r_doorbell_interrupt(a, doorbell); |
| 121 | } |
| 122 | |
| 123 | a->int_mask = ESAS2R_INT_STS_MASK; |
| 124 | |
| 125 | esas2r_enable_chip_interrupts(a); |
| 126 | |
| 127 | if (likely(atomic_read(&a->disable_cnt) == 0)) |
| 128 | esas2r_do_deferred_processes(a); |
| 129 | } |
| 130 | |
| 131 | irqreturn_t esas2r_msi_interrupt(int irq, void *dev_id) |
| 132 | { |
| 133 | struct esas2r_adapter *a = (struct esas2r_adapter *)dev_id; |
| 134 | u32 intstat; |
| 135 | u32 doorbell; |
| 136 | |
| 137 | intstat = esas2r_read_register_dword(a, MU_INT_STATUS_OUT); |
| 138 | |
| 139 | if (likely(intstat & MU_INTSTAT_POST_OUT)) { |
| 140 | /* clear the interrupt */ |
| 141 | |
| 142 | esas2r_write_register_dword(a, MU_OUT_LIST_INT_STAT, |
| 143 | MU_OLIS_INT); |
| 144 | esas2r_flush_register_dword(a, MU_OUT_LIST_INT_STAT); |
| 145 | |
| 146 | esas2r_get_outbound_responses(a); |
| 147 | } |
| 148 | |
| 149 | if (unlikely(intstat & MU_INTSTAT_DRBL)) { |
| 150 | doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT); |
| 151 | if (doorbell != 0) |
| 152 | esas2r_doorbell_interrupt(a, doorbell); |
| 153 | } |
| 154 | |
| 155 | /* |
| 156 | * Work around a chip bug and force a new MSI to be sent if one is |
| 157 | * still pending. |
| 158 | */ |
| 159 | esas2r_disable_chip_interrupts(a); |
| 160 | esas2r_enable_chip_interrupts(a); |
| 161 | |
| 162 | if (likely(atomic_read(&a->disable_cnt) == 0)) |
| 163 | esas2r_do_deferred_processes(a); |
| 164 | |
| 165 | esas2r_do_tasklet_tasks(a); |
| 166 | |
| 167 | return 1; |
| 168 | } |
| 169 | |
| 170 | |
| 171 | |
| 172 | static void esas2r_handle_outbound_rsp_err(struct esas2r_adapter *a, |
| 173 | struct esas2r_request *rq, |
| 174 | struct atto_vda_ob_rsp *rsp) |
| 175 | { |
| 176 | |
| 177 | /* |
| 178 | * For I/O requests, only copy the response if an error |
| 179 | * occurred and setup a callback to do error processing. |
| 180 | */ |
| 181 | if (unlikely(rq->req_stat != RS_SUCCESS)) { |
| 182 | memcpy(&rq->func_rsp, &rsp->func_rsp, sizeof(rsp->func_rsp)); |
| 183 | |
| 184 | if (rq->req_stat == RS_ABORTED) { |
| 185 | if (rq->timeout > RQ_MAX_TIMEOUT) |
| 186 | rq->req_stat = RS_TIMEOUT; |
| 187 | } else if (rq->req_stat == RS_SCSI_ERROR) { |
| 188 | u8 scsistatus = rq->func_rsp.scsi_rsp.scsi_stat; |
| 189 | |
| 190 | esas2r_trace("scsistatus: %x", scsistatus); |
| 191 | |
| 192 | /* Any of these are a good result. */ |
| 193 | if (scsistatus == SAM_STAT_GOOD || scsistatus == |
| 194 | SAM_STAT_CONDITION_MET || scsistatus == |
| 195 | SAM_STAT_INTERMEDIATE || scsistatus == |
| 196 | SAM_STAT_INTERMEDIATE_CONDITION_MET) { |
| 197 | rq->req_stat = RS_SUCCESS; |
| 198 | rq->func_rsp.scsi_rsp.scsi_stat = |
| 199 | SAM_STAT_GOOD; |
| 200 | } |
| 201 | } |
| 202 | } |
| 203 | } |
| 204 | |
| 205 | static void esas2r_get_outbound_responses(struct esas2r_adapter *a) |
| 206 | { |
| 207 | struct atto_vda_ob_rsp *rsp; |
| 208 | u32 rspput_ptr; |
| 209 | u32 rspget_ptr; |
| 210 | struct esas2r_request *rq; |
| 211 | u32 handle; |
| 212 | unsigned long flags; |
| 213 | |
| 214 | LIST_HEAD(comp_list); |
| 215 | |
| 216 | esas2r_trace_enter(); |
| 217 | |
| 218 | spin_lock_irqsave(&a->queue_lock, flags); |
| 219 | |
| 220 | /* Get the outbound limit and pointers */ |
| 221 | rspput_ptr = le32_to_cpu(*a->outbound_copy) & MU_OLC_WRT_PTR; |
| 222 | rspget_ptr = a->last_read; |
| 223 | |
| 224 | esas2r_trace("rspput_ptr: %x, rspget_ptr: %x", rspput_ptr, rspget_ptr); |
| 225 | |
| 226 | /* If we don't have anything to process, get out */ |
| 227 | if (unlikely(rspget_ptr == rspput_ptr)) { |
| 228 | spin_unlock_irqrestore(&a->queue_lock, flags); |
| 229 | esas2r_trace_exit(); |
| 230 | return; |
| 231 | } |
| 232 | |
| 233 | /* Make sure the firmware is healthy */ |
| 234 | if (unlikely(rspput_ptr >= a->list_size)) { |
| 235 | spin_unlock_irqrestore(&a->queue_lock, flags); |
| 236 | esas2r_bugon(); |
| 237 | esas2r_local_reset_adapter(a); |
| 238 | esas2r_trace_exit(); |
| 239 | return; |
| 240 | } |
| 241 | |
| 242 | do { |
| 243 | rspget_ptr++; |
| 244 | |
| 245 | if (rspget_ptr >= a->list_size) |
| 246 | rspget_ptr = 0; |
| 247 | |
| 248 | rsp = (struct atto_vda_ob_rsp *)a->outbound_list_md.virt_addr |
| 249 | + rspget_ptr; |
| 250 | |
| 251 | handle = rsp->handle; |
| 252 | |
| 253 | /* Verify the handle range */ |
| 254 | if (unlikely(LOWORD(handle) == 0 |
| 255 | || LOWORD(handle) > num_requests + |
| 256 | num_ae_requests + 1)) { |
| 257 | esas2r_bugon(); |
| 258 | continue; |
| 259 | } |
| 260 | |
| 261 | /* Get the request for this handle */ |
| 262 | rq = a->req_table[LOWORD(handle)]; |
| 263 | |
| 264 | if (unlikely(rq == NULL || rq->vrq->scsi.handle != handle)) { |
| 265 | esas2r_bugon(); |
| 266 | continue; |
| 267 | } |
| 268 | |
| 269 | list_del(&rq->req_list); |
| 270 | |
| 271 | /* Get the completion status */ |
| 272 | rq->req_stat = rsp->req_stat; |
| 273 | |
| 274 | esas2r_trace("handle: %x", handle); |
| 275 | esas2r_trace("rq: %p", rq); |
| 276 | esas2r_trace("req_status: %x", rq->req_stat); |
| 277 | |
| 278 | if (likely(rq->vrq->scsi.function == VDA_FUNC_SCSI)) { |
| 279 | esas2r_handle_outbound_rsp_err(a, rq, rsp); |
| 280 | } else { |
| 281 | /* |
| 282 | * Copy the outbound completion struct for non-I/O |
| 283 | * requests. |
| 284 | */ |
| 285 | memcpy(&rq->func_rsp, &rsp->func_rsp, |
| 286 | sizeof(rsp->func_rsp)); |
| 287 | } |
| 288 | |
| 289 | /* Queue the request for completion. */ |
| 290 | list_add_tail(&rq->comp_list, &comp_list); |
| 291 | |
| 292 | } while (rspget_ptr != rspput_ptr); |
| 293 | |
| 294 | a->last_read = rspget_ptr; |
| 295 | spin_unlock_irqrestore(&a->queue_lock, flags); |
| 296 | |
| 297 | esas2r_comp_list_drain(a, &comp_list); |
| 298 | esas2r_trace_exit(); |
| 299 | } |
| 300 | |
| 301 | /* |
| 302 | * Perform all deferred processes for the adapter. Deferred |
| 303 | * processes can only be done while the current interrupt |
| 304 | * disable_cnt for the adapter is zero. |
| 305 | */ |
| 306 | void esas2r_do_deferred_processes(struct esas2r_adapter *a) |
| 307 | { |
| 308 | int startreqs = 2; |
| 309 | struct esas2r_request *rq; |
| 310 | unsigned long flags; |
| 311 | |
| 312 | /* |
| 313 | * startreqs is used to control starting requests |
| 314 | * that are on the deferred queue |
| 315 | * = 0 - do not start any requests |
| 316 | * = 1 - can start discovery requests |
| 317 | * = 2 - can start any request |
| 318 | */ |
| 319 | |
| 320 | if (a->flags & (AF_CHPRST_PENDING | AF_FLASHING)) |
| 321 | startreqs = 0; |
| 322 | else if (a->flags & AF_DISC_PENDING) |
| 323 | startreqs = 1; |
| 324 | |
| 325 | atomic_inc(&a->disable_cnt); |
| 326 | |
| 327 | /* Clear off the completed list to be processed later. */ |
| 328 | |
| 329 | if (esas2r_is_tasklet_pending(a)) { |
| 330 | esas2r_schedule_tasklet(a); |
| 331 | |
| 332 | startreqs = 0; |
| 333 | } |
| 334 | |
| 335 | /* |
| 336 | * If we can start requests then traverse the defer queue |
| 337 | * looking for requests to start or complete |
| 338 | */ |
| 339 | if (startreqs && !list_empty(&a->defer_list)) { |
| 340 | LIST_HEAD(comp_list); |
| 341 | struct list_head *element, *next; |
| 342 | |
| 343 | spin_lock_irqsave(&a->queue_lock, flags); |
| 344 | |
| 345 | list_for_each_safe(element, next, &a->defer_list) { |
| 346 | rq = list_entry(element, struct esas2r_request, |
| 347 | req_list); |
| 348 | |
| 349 | if (rq->req_stat != RS_PENDING) { |
| 350 | list_del(element); |
| 351 | list_add_tail(&rq->comp_list, &comp_list); |
| 352 | } |
| 353 | /* |
| 354 | * Process discovery and OS requests separately. We |
| 355 | * can't hold up discovery requests when discovery is |
| 356 | * pending. In general, there may be different sets of |
| 357 | * conditions for starting different types of requests. |
| 358 | */ |
| 359 | else if (rq->req_type == RT_DISC_REQ) { |
| 360 | list_del(element); |
| 361 | esas2r_disc_local_start_request(a, rq); |
| 362 | } else if (startreqs == 2) { |
| 363 | list_del(element); |
| 364 | esas2r_local_start_request(a, rq); |
| 365 | |
| 366 | /* |
| 367 | * Flashing could have been set by last local |
| 368 | * start |
| 369 | */ |
| 370 | if (a->flags & AF_FLASHING) |
| 371 | break; |
| 372 | } |
| 373 | } |
| 374 | |
| 375 | spin_unlock_irqrestore(&a->queue_lock, flags); |
| 376 | esas2r_comp_list_drain(a, &comp_list); |
| 377 | } |
| 378 | |
| 379 | atomic_dec(&a->disable_cnt); |
| 380 | } |
| 381 | |
| 382 | /* |
| 383 | * Process an adapter reset (or one that is about to happen) |
| 384 | * by making sure all outstanding requests are completed that |
| 385 | * haven't been already. |
| 386 | */ |
| 387 | void esas2r_process_adapter_reset(struct esas2r_adapter *a) |
| 388 | { |
| 389 | struct esas2r_request *rq = &a->general_req; |
| 390 | unsigned long flags; |
| 391 | struct esas2r_disc_context *dc; |
| 392 | |
| 393 | LIST_HEAD(comp_list); |
| 394 | struct list_head *element; |
| 395 | |
| 396 | esas2r_trace_enter(); |
| 397 | |
| 398 | spin_lock_irqsave(&a->queue_lock, flags); |
| 399 | |
| 400 | /* abort the active discovery, if any. */ |
| 401 | |
| 402 | if (rq->interrupt_cx) { |
| 403 | dc = (struct esas2r_disc_context *)rq->interrupt_cx; |
| 404 | |
| 405 | dc->disc_evt = 0; |
| 406 | |
| 407 | esas2r_lock_clear_flags(&a->flags, AF_DISC_IN_PROG); |
| 408 | } |
| 409 | |
| 410 | /* |
| 411 | * just clear the interrupt callback for now. it will be dequeued if |
| 412 | * and when we find it on the active queue and we don't want the |
| 413 | * callback called. also set the dummy completion callback in case we |
| 414 | * were doing an I/O request. |
| 415 | */ |
| 416 | |
| 417 | rq->interrupt_cx = NULL; |
| 418 | rq->interrupt_cb = NULL; |
| 419 | |
| 420 | rq->comp_cb = esas2r_dummy_complete; |
| 421 | |
| 422 | /* Reset the read and write pointers */ |
| 423 | |
| 424 | *a->outbound_copy = |
| 425 | a->last_write = |
| 426 | a->last_read = a->list_size - 1; |
| 427 | |
| 428 | esas2r_lock_set_flags(&a->flags, AF_COMM_LIST_TOGGLE); |
| 429 | |
| 430 | /* Kill all the requests on the active list */ |
| 431 | list_for_each(element, &a->defer_list) { |
| 432 | rq = list_entry(element, struct esas2r_request, req_list); |
| 433 | |
| 434 | if (rq->req_stat == RS_STARTED) |
| 435 | if (esas2r_ioreq_aborted(a, rq, RS_ABORTED)) |
| 436 | list_add_tail(&rq->comp_list, &comp_list); |
| 437 | } |
| 438 | |
| 439 | spin_unlock_irqrestore(&a->queue_lock, flags); |
| 440 | esas2r_comp_list_drain(a, &comp_list); |
| 441 | esas2r_process_bus_reset(a); |
| 442 | esas2r_trace_exit(); |
| 443 | } |
| 444 | |
| 445 | static void esas2r_process_bus_reset(struct esas2r_adapter *a) |
| 446 | { |
| 447 | struct esas2r_request *rq; |
| 448 | struct list_head *element; |
| 449 | unsigned long flags; |
| 450 | |
| 451 | LIST_HEAD(comp_list); |
| 452 | |
| 453 | esas2r_trace_enter(); |
| 454 | |
| 455 | esas2r_hdebug("reset detected"); |
| 456 | |
| 457 | spin_lock_irqsave(&a->queue_lock, flags); |
| 458 | |
| 459 | /* kill all the requests on the deferred queue */ |
| 460 | list_for_each(element, &a->defer_list) { |
| 461 | rq = list_entry(element, struct esas2r_request, req_list); |
| 462 | if (esas2r_ioreq_aborted(a, rq, RS_ABORTED)) |
| 463 | list_add_tail(&rq->comp_list, &comp_list); |
| 464 | } |
| 465 | |
| 466 | spin_unlock_irqrestore(&a->queue_lock, flags); |
| 467 | |
| 468 | esas2r_comp_list_drain(a, &comp_list); |
| 469 | |
| 470 | if (atomic_read(&a->disable_cnt) == 0) |
| 471 | esas2r_do_deferred_processes(a); |
| 472 | |
| 473 | esas2r_lock_clear_flags(&a->flags, AF_OS_RESET); |
| 474 | |
| 475 | esas2r_trace_exit(); |
| 476 | } |
| 477 | |
| 478 | static void esas2r_chip_rst_needed_during_tasklet(struct esas2r_adapter *a) |
| 479 | { |
| 480 | |
| 481 | esas2r_lock_clear_flags(&a->flags, AF_CHPRST_NEEDED); |
| 482 | esas2r_lock_clear_flags(&a->flags, AF_BUSRST_NEEDED); |
| 483 | esas2r_lock_clear_flags(&a->flags, AF_BUSRST_DETECTED); |
| 484 | esas2r_lock_clear_flags(&a->flags, AF_BUSRST_PENDING); |
| 485 | /* |
| 486 | * Make sure we don't get attempt more than 3 resets |
| 487 | * when the uptime between resets does not exceed one |
| 488 | * minute. This will stop any situation where there is |
| 489 | * really something wrong with the hardware. The way |
| 490 | * this works is that we start with uptime ticks at 0. |
| 491 | * Each time we do a reset, we add 20 seconds worth to |
| 492 | * the count. Each time a timer tick occurs, as long |
| 493 | * as a chip reset is not pending, we decrement the |
| 494 | * tick count. If the uptime ticks ever gets to 60 |
| 495 | * seconds worth, we disable the adapter from that |
| 496 | * point forward. Three strikes, you're out. |
| 497 | */ |
| 498 | if (!esas2r_is_adapter_present(a) || (a->chip_uptime >= |
| 499 | ESAS2R_CHP_UPTIME_MAX)) { |
| 500 | esas2r_hdebug("*** adapter disabled ***"); |
| 501 | |
| 502 | /* |
| 503 | * Ok, some kind of hard failure. Make sure we |
| 504 | * exit this loop with chip interrupts |
| 505 | * permanently disabled so we don't lock up the |
| 506 | * entire system. Also flag degraded mode to |
| 507 | * prevent the heartbeat from trying to recover. |
| 508 | */ |
| 509 | |
| 510 | esas2r_lock_set_flags(&a->flags, AF_DEGRADED_MODE); |
| 511 | esas2r_lock_set_flags(&a->flags, AF_DISABLED); |
| 512 | esas2r_lock_clear_flags(&a->flags, AF_CHPRST_PENDING); |
| 513 | esas2r_lock_clear_flags(&a->flags, AF_DISC_PENDING); |
| 514 | |
| 515 | esas2r_disable_chip_interrupts(a); |
| 516 | a->int_mask = 0; |
| 517 | esas2r_process_adapter_reset(a); |
| 518 | |
| 519 | esas2r_log(ESAS2R_LOG_CRIT, |
| 520 | "Adapter disabled because of hardware failure"); |
| 521 | } else { |
| 522 | u32 flags = |
| 523 | esas2r_lock_set_flags(&a->flags, AF_CHPRST_STARTED); |
| 524 | |
| 525 | if (!(flags & AF_CHPRST_STARTED)) |
| 526 | /* |
| 527 | * Only disable interrupts if this is |
| 528 | * the first reset attempt. |
| 529 | */ |
| 530 | esas2r_disable_chip_interrupts(a); |
| 531 | |
| 532 | if ((a->flags & AF_POWER_MGT) && !(a->flags & AF_FIRST_INIT) && |
| 533 | !(flags & AF_CHPRST_STARTED)) { |
| 534 | /* |
| 535 | * Don't reset the chip on the first |
| 536 | * deferred power up attempt. |
| 537 | */ |
| 538 | } else { |
| 539 | esas2r_hdebug("*** resetting chip ***"); |
| 540 | esas2r_reset_chip(a); |
| 541 | } |
| 542 | |
| 543 | /* Kick off the reinitialization */ |
| 544 | a->chip_uptime += ESAS2R_CHP_UPTIME_CNT; |
| 545 | a->chip_init_time = jiffies_to_msecs(jiffies); |
| 546 | if (!(a->flags & AF_POWER_MGT)) { |
| 547 | esas2r_process_adapter_reset(a); |
| 548 | |
| 549 | if (!(flags & AF_CHPRST_STARTED)) { |
| 550 | /* Remove devices now that I/O is cleaned up. */ |
| 551 | a->prev_dev_cnt = |
| 552 | esas2r_targ_db_get_tgt_cnt(a); |
| 553 | esas2r_targ_db_remove_all(a, false); |
| 554 | } |
| 555 | } |
| 556 | |
| 557 | a->int_mask = 0; |
| 558 | } |
| 559 | } |
| 560 | |
| 561 | static void esas2r_handle_chip_rst_during_tasklet(struct esas2r_adapter *a) |
| 562 | { |
| 563 | while (a->flags & AF_CHPRST_DETECTED) { |
| 564 | /* |
| 565 | * Balance the enable in esas2r_initadapter_hw. |
| 566 | * Esas2r_power_down already took care of it for power |
| 567 | * management. |
| 568 | */ |
| 569 | if (!(a->flags & AF_DEGRADED_MODE) && !(a->flags & |
| 570 | AF_POWER_MGT)) |
| 571 | esas2r_disable_chip_interrupts(a); |
| 572 | |
| 573 | /* Reinitialize the chip. */ |
| 574 | esas2r_check_adapter(a); |
| 575 | esas2r_init_adapter_hw(a, 0); |
| 576 | |
| 577 | if (a->flags & AF_CHPRST_NEEDED) |
| 578 | break; |
| 579 | |
| 580 | if (a->flags & AF_POWER_MGT) { |
| 581 | /* Recovery from power management. */ |
| 582 | if (a->flags & AF_FIRST_INIT) { |
| 583 | /* Chip reset during normal power up */ |
| 584 | esas2r_log(ESAS2R_LOG_CRIT, |
| 585 | "The firmware was reset during a normal power-up sequence"); |
| 586 | } else { |
| 587 | /* Deferred power up complete. */ |
| 588 | esas2r_lock_clear_flags(&a->flags, |
| 589 | AF_POWER_MGT); |
| 590 | esas2r_send_reset_ae(a, true); |
| 591 | } |
| 592 | } else { |
| 593 | /* Recovery from online chip reset. */ |
| 594 | if (a->flags & AF_FIRST_INIT) { |
| 595 | /* Chip reset during driver load */ |
| 596 | } else { |
| 597 | /* Chip reset after driver load */ |
| 598 | esas2r_send_reset_ae(a, false); |
| 599 | } |
| 600 | |
| 601 | esas2r_log(ESAS2R_LOG_CRIT, |
| 602 | "Recovering from a chip reset while the chip was online"); |
| 603 | } |
| 604 | |
| 605 | esas2r_lock_clear_flags(&a->flags, AF_CHPRST_STARTED); |
| 606 | esas2r_enable_chip_interrupts(a); |
| 607 | |
| 608 | /* |
| 609 | * Clear this flag last! this indicates that the chip has been |
| 610 | * reset already during initialization. |
| 611 | */ |
| 612 | esas2r_lock_clear_flags(&a->flags, AF_CHPRST_DETECTED); |
| 613 | } |
| 614 | } |
| 615 | |
| 616 | |
| 617 | /* Perform deferred tasks when chip interrupts are disabled */ |
| 618 | void esas2r_do_tasklet_tasks(struct esas2r_adapter *a) |
| 619 | { |
| 620 | if (a->flags & (AF_CHPRST_NEEDED | AF_CHPRST_DETECTED)) { |
| 621 | if (a->flags & AF_CHPRST_NEEDED) |
| 622 | esas2r_chip_rst_needed_during_tasklet(a); |
| 623 | |
| 624 | esas2r_handle_chip_rst_during_tasklet(a); |
| 625 | } |
| 626 | |
| 627 | if (a->flags & AF_BUSRST_NEEDED) { |
| 628 | esas2r_hdebug("hard resetting bus"); |
| 629 | |
| 630 | esas2r_lock_clear_flags(&a->flags, AF_BUSRST_NEEDED); |
| 631 | |
| 632 | if (a->flags & AF_FLASHING) |
| 633 | esas2r_lock_set_flags(&a->flags, AF_BUSRST_DETECTED); |
| 634 | else |
| 635 | esas2r_write_register_dword(a, MU_DOORBELL_IN, |
| 636 | DRBL_RESET_BUS); |
| 637 | } |
| 638 | |
| 639 | if (a->flags & AF_BUSRST_DETECTED) { |
| 640 | esas2r_process_bus_reset(a); |
| 641 | |
| 642 | esas2r_log_dev(ESAS2R_LOG_WARN, |
| 643 | &(a->host->shost_gendev), |
| 644 | "scsi_report_bus_reset() called"); |
| 645 | |
| 646 | scsi_report_bus_reset(a->host, 0); |
| 647 | |
| 648 | esas2r_lock_clear_flags(&a->flags, AF_BUSRST_DETECTED); |
| 649 | esas2r_lock_clear_flags(&a->flags, AF_BUSRST_PENDING); |
| 650 | |
| 651 | esas2r_log(ESAS2R_LOG_WARN, "Bus reset complete"); |
| 652 | } |
| 653 | |
| 654 | if (a->flags & AF_PORT_CHANGE) { |
| 655 | esas2r_lock_clear_flags(&a->flags, AF_PORT_CHANGE); |
| 656 | |
| 657 | esas2r_targ_db_report_changes(a); |
| 658 | } |
| 659 | |
| 660 | if (atomic_read(&a->disable_cnt) == 0) |
| 661 | esas2r_do_deferred_processes(a); |
| 662 | } |
| 663 | |
| 664 | static void esas2r_doorbell_interrupt(struct esas2r_adapter *a, u32 doorbell) |
| 665 | { |
| 666 | if (!(doorbell & DRBL_FORCE_INT)) { |
| 667 | esas2r_trace_enter(); |
| 668 | esas2r_trace("doorbell: %x", doorbell); |
| 669 | } |
| 670 | |
| 671 | /* First clear the doorbell bits */ |
| 672 | esas2r_write_register_dword(a, MU_DOORBELL_OUT, doorbell); |
| 673 | |
| 674 | if (doorbell & DRBL_RESET_BUS) |
| 675 | esas2r_lock_set_flags(&a->flags, AF_BUSRST_DETECTED); |
| 676 | |
| 677 | if (doorbell & DRBL_FORCE_INT) |
| 678 | esas2r_lock_clear_flags(&a->flags, AF_HEARTBEAT); |
| 679 | |
| 680 | if (doorbell & DRBL_PANIC_REASON_MASK) { |
| 681 | esas2r_hdebug("*** Firmware Panic ***"); |
| 682 | esas2r_log(ESAS2R_LOG_CRIT, "The firmware has panicked"); |
| 683 | } |
| 684 | |
| 685 | if (doorbell & DRBL_FW_RESET) { |
| 686 | esas2r_lock_set_flags(&a->flags2, AF2_COREDUMP_AVAIL); |
| 687 | esas2r_local_reset_adapter(a); |
| 688 | } |
| 689 | |
| 690 | if (!(doorbell & DRBL_FORCE_INT)) |
| 691 | esas2r_trace_exit(); |
| 692 | } |
| 693 | |
| 694 | void esas2r_force_interrupt(struct esas2r_adapter *a) |
| 695 | { |
| 696 | esas2r_write_register_dword(a, MU_DOORBELL_IN, DRBL_FORCE_INT | |
| 697 | DRBL_DRV_VER); |
| 698 | } |
| 699 | |
| 700 | |
| 701 | static void esas2r_lun_event(struct esas2r_adapter *a, union atto_vda_ae *ae, |
| 702 | u16 target, u32 length) |
| 703 | { |
| 704 | struct esas2r_target *t = a->targetdb + target; |
| 705 | u32 cplen = length; |
| 706 | unsigned long flags; |
| 707 | |
| 708 | if (cplen > sizeof(t->lu_event)) |
| 709 | cplen = sizeof(t->lu_event); |
| 710 | |
| 711 | esas2r_trace("ae->lu.dwevent: %x", ae->lu.dwevent); |
| 712 | esas2r_trace("ae->lu.bystate: %x", ae->lu.bystate); |
| 713 | |
| 714 | spin_lock_irqsave(&a->mem_lock, flags); |
| 715 | |
| 716 | t->new_target_state = TS_INVALID; |
| 717 | |
| 718 | if (ae->lu.dwevent & VDAAE_LU_LOST) { |
| 719 | t->new_target_state = TS_NOT_PRESENT; |
| 720 | } else { |
| 721 | switch (ae->lu.bystate) { |
| 722 | case VDAAE_LU_NOT_PRESENT: |
| 723 | case VDAAE_LU_OFFLINE: |
| 724 | case VDAAE_LU_DELETED: |
| 725 | case VDAAE_LU_FACTORY_DISABLED: |
| 726 | t->new_target_state = TS_NOT_PRESENT; |
| 727 | break; |
| 728 | |
| 729 | case VDAAE_LU_ONLINE: |
| 730 | case VDAAE_LU_DEGRADED: |
| 731 | t->new_target_state = TS_PRESENT; |
| 732 | break; |
| 733 | } |
| 734 | } |
| 735 | |
| 736 | if (t->new_target_state != TS_INVALID) { |
| 737 | memcpy(&t->lu_event, &ae->lu, cplen); |
| 738 | |
| 739 | esas2r_disc_queue_event(a, DCDE_DEV_CHANGE); |
| 740 | } |
| 741 | |
| 742 | spin_unlock_irqrestore(&a->mem_lock, flags); |
| 743 | } |
| 744 | |
| 745 | |
| 746 | |
| 747 | void esas2r_ae_complete(struct esas2r_adapter *a, struct esas2r_request *rq) |
| 748 | { |
| 749 | union atto_vda_ae *ae = |
| 750 | (union atto_vda_ae *)rq->vda_rsp_data->ae_data.event_data; |
| 751 | u32 length = le32_to_cpu(rq->func_rsp.ae_rsp.length); |
| 752 | union atto_vda_ae *last = |
| 753 | (union atto_vda_ae *)(rq->vda_rsp_data->ae_data.event_data |
| 754 | + length); |
| 755 | |
| 756 | esas2r_trace_enter(); |
| 757 | esas2r_trace("length: %d", length); |
| 758 | |
| 759 | if (length > sizeof(struct atto_vda_ae_data) |
| 760 | || (length & 3) != 0 |
| 761 | || length == 0) { |
| 762 | esas2r_log(ESAS2R_LOG_WARN, |
| 763 | "The AE request response length (%p) is too long: %d", |
| 764 | rq, length); |
| 765 | |
| 766 | esas2r_hdebug("aereq->length (0x%x) too long", length); |
| 767 | esas2r_bugon(); |
| 768 | |
| 769 | last = ae; |
| 770 | } |
| 771 | |
| 772 | while (ae < last) { |
| 773 | u16 target; |
| 774 | |
| 775 | esas2r_trace("ae: %p", ae); |
| 776 | esas2r_trace("ae->hdr: %p", &(ae->hdr)); |
| 777 | |
| 778 | length = ae->hdr.bylength; |
| 779 | |
| 780 | if (length > (u32)((u8 *)last - (u8 *)ae) |
| 781 | || (length & 3) != 0 |
| 782 | || length == 0) { |
| 783 | esas2r_log(ESAS2R_LOG_CRIT, |
| 784 | "the async event length is invalid (%p): %d", |
| 785 | ae, length); |
| 786 | |
| 787 | esas2r_hdebug("ae->hdr.length (0x%x) invalid", length); |
| 788 | esas2r_bugon(); |
| 789 | |
| 790 | break; |
| 791 | } |
| 792 | |
| 793 | esas2r_nuxi_ae_data(ae); |
| 794 | |
| 795 | esas2r_queue_fw_event(a, fw_event_vda_ae, ae, |
| 796 | sizeof(union atto_vda_ae)); |
| 797 | |
| 798 | switch (ae->hdr.bytype) { |
| 799 | case VDAAE_HDR_TYPE_RAID: |
| 800 | |
| 801 | if (ae->raid.dwflags & (VDAAE_GROUP_STATE |
| 802 | | VDAAE_RBLD_STATE |
| 803 | | VDAAE_MEMBER_CHG |
| 804 | | VDAAE_PART_CHG)) { |
| 805 | esas2r_log(ESAS2R_LOG_INFO, |
| 806 | "RAID event received - name:%s rebuild_state:%d group_state:%d", |
| 807 | ae->raid.acname, |
| 808 | ae->raid.byrebuild_state, |
| 809 | ae->raid.bygroup_state); |
| 810 | } |
| 811 | |
| 812 | break; |
| 813 | |
| 814 | case VDAAE_HDR_TYPE_LU: |
| 815 | esas2r_log(ESAS2R_LOG_INFO, |
| 816 | "LUN event received: event:%d target_id:%d LUN:%d state:%d", |
| 817 | ae->lu.dwevent, |
| 818 | ae->lu.id.tgtlun.wtarget_id, |
| 819 | ae->lu.id.tgtlun.bylun, |
| 820 | ae->lu.bystate); |
| 821 | |
| 822 | target = ae->lu.id.tgtlun.wtarget_id; |
| 823 | |
| 824 | if (target < ESAS2R_MAX_TARGETS) |
| 825 | esas2r_lun_event(a, ae, target, length); |
| 826 | |
| 827 | break; |
| 828 | |
| 829 | case VDAAE_HDR_TYPE_DISK: |
| 830 | esas2r_log(ESAS2R_LOG_INFO, "Disk event received"); |
| 831 | break; |
| 832 | |
| 833 | default: |
| 834 | |
| 835 | /* Silently ignore the rest and let the apps deal with |
| 836 | * them. |
| 837 | */ |
| 838 | |
| 839 | break; |
| 840 | } |
| 841 | |
| 842 | ae = (union atto_vda_ae *)((u8 *)ae + length); |
| 843 | } |
| 844 | |
| 845 | /* Now requeue it. */ |
| 846 | esas2r_start_ae_request(a, rq); |
| 847 | esas2r_trace_exit(); |
| 848 | } |
| 849 | |
| 850 | /* Send an asynchronous event for a chip reset or power management. */ |
| 851 | void esas2r_send_reset_ae(struct esas2r_adapter *a, bool pwr_mgt) |
| 852 | { |
| 853 | struct atto_vda_ae_hdr ae; |
| 854 | |
| 855 | if (pwr_mgt) |
| 856 | ae.bytype = VDAAE_HDR_TYPE_PWRMGT; |
| 857 | else |
| 858 | ae.bytype = VDAAE_HDR_TYPE_RESET; |
| 859 | |
| 860 | ae.byversion = VDAAE_HDR_VER_0; |
| 861 | ae.byflags = 0; |
| 862 | ae.bylength = (u8)sizeof(struct atto_vda_ae_hdr); |
| 863 | |
| 864 | if (pwr_mgt) |
| 865 | esas2r_hdebug("*** sending power management AE ***"); |
| 866 | else |
| 867 | esas2r_hdebug("*** sending reset AE ***"); |
| 868 | |
| 869 | esas2r_queue_fw_event(a, fw_event_vda_ae, &ae, |
| 870 | sizeof(union atto_vda_ae)); |
| 871 | } |
| 872 | |
| 873 | void esas2r_dummy_complete(struct esas2r_adapter *a, struct esas2r_request *rq) |
| 874 | {} |
| 875 | |
| 876 | static void esas2r_check_req_rsp_sense(struct esas2r_adapter *a, |
| 877 | struct esas2r_request *rq) |
| 878 | { |
| 879 | u8 snslen, snslen2; |
| 880 | |
| 881 | snslen = snslen2 = rq->func_rsp.scsi_rsp.sense_len; |
| 882 | |
| 883 | if (snslen > rq->sense_len) |
| 884 | snslen = rq->sense_len; |
| 885 | |
| 886 | if (snslen) { |
| 887 | if (rq->sense_buf) |
| 888 | memcpy(rq->sense_buf, rq->data_buf, snslen); |
| 889 | else |
| 890 | rq->sense_buf = (u8 *)rq->data_buf; |
| 891 | |
| 892 | /* See about possible sense data */ |
| 893 | if (snslen2 > 0x0c) { |
| 894 | u8 *s = (u8 *)rq->data_buf; |
| 895 | |
| 896 | esas2r_trace_enter(); |
| 897 | |
| 898 | /* Report LUNS data has changed */ |
| 899 | if (s[0x0c] == 0x3f && s[0x0d] == 0x0E) { |
| 900 | esas2r_trace("rq->target_id: %d", |
| 901 | rq->target_id); |
| 902 | esas2r_target_state_changed(a, rq->target_id, |
| 903 | TS_LUN_CHANGE); |
| 904 | } |
| 905 | |
| 906 | esas2r_trace("add_sense_key=%x", s[0x0c]); |
| 907 | esas2r_trace("add_sense_qual=%x", s[0x0d]); |
| 908 | esas2r_trace_exit(); |
| 909 | } |
| 910 | } |
| 911 | |
| 912 | rq->sense_len = snslen; |
| 913 | } |
| 914 | |
| 915 | |
| 916 | void esas2r_complete_request(struct esas2r_adapter *a, |
| 917 | struct esas2r_request *rq) |
| 918 | { |
| 919 | if (rq->vrq->scsi.function == VDA_FUNC_FLASH |
| 920 | && rq->vrq->flash.sub_func == VDA_FLASH_COMMIT) |
| 921 | esas2r_lock_clear_flags(&a->flags, AF_FLASHING); |
| 922 | |
| 923 | /* See if we setup a callback to do special processing */ |
| 924 | |
| 925 | if (rq->interrupt_cb) { |
| 926 | (*rq->interrupt_cb)(a, rq); |
| 927 | |
| 928 | if (rq->req_stat == RS_PENDING) { |
| 929 | esas2r_start_request(a, rq); |
| 930 | return; |
| 931 | } |
| 932 | } |
| 933 | |
| 934 | if (likely(rq->vrq->scsi.function == VDA_FUNC_SCSI) |
| 935 | && unlikely(rq->req_stat != RS_SUCCESS)) { |
| 936 | esas2r_check_req_rsp_sense(a, rq); |
| 937 | esas2r_log_request_failure(a, rq); |
| 938 | } |
| 939 | |
| 940 | (*rq->comp_cb)(a, rq); |
| 941 | } |