1 /* 2 * Copyright © 2014-2017 Intel Corporation 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 21 * IN THE SOFTWARE. 22 * 23 */ 24 25 #include <linux/debugfs.h> 26 #include <linux/relay.h> 27 28 #include "intel_guc_log.h" 29 #include "i915_drv.h" 30 31 #if 0 32 static void guc_log_capture_logs(struct intel_guc *guc); 33 34 /** 35 * DOC: GuC firmware log 36 * 37 * Firmware log is enabled by setting i915.guc_log_level to non-negative level. 38 * Log data is printed out via reading debugfs i915_guc_log_dump. Reading from 39 * i915_guc_load_status will print out firmware loading status and scratch 40 * registers value. 41 * 42 */ 43 44 static int guc_log_flush_complete(struct intel_guc *guc) 45 { 46 u32 action[] = { 47 INTEL_GUC_ACTION_LOG_BUFFER_FILE_FLUSH_COMPLETE 48 }; 49 50 return intel_guc_send(guc, action, ARRAY_SIZE(action)); 51 } 52 53 static int guc_log_flush(struct intel_guc *guc) 54 { 55 u32 action[] = { 56 INTEL_GUC_ACTION_FORCE_LOG_BUFFER_FLUSH, 57 0 58 }; 59 60 return intel_guc_send(guc, action, ARRAY_SIZE(action)); 61 } 62 63 static int guc_log_control(struct intel_guc *guc, u32 control_val) 64 { 65 u32 action[] = { 66 INTEL_GUC_ACTION_UK_LOG_ENABLE_LOGGING, 67 control_val 68 }; 69 70 return intel_guc_send(guc, action, ARRAY_SIZE(action)); 71 } 72 73 /* 74 * Sub buffer switch callback. Called whenever relay has to switch to a new 75 * sub buffer, relay stays on the same sub buffer if 0 is returned. 76 */ 77 static int subbuf_start_callback(struct rchan_buf *buf, 78 void *subbuf, 79 void *prev_subbuf, 80 size_t prev_padding) 81 { 82 /* Use no-overwrite mode by default, where relay will stop accepting 83 * new data if there are no empty sub buffers left. 84 * There is no strict synchronization enforced by relay between Consumer 85 * and Producer. In overwrite mode, there is a possibility of getting 86 * inconsistent/garbled data, the producer could be writing on to the 87 * same sub buffer from which Consumer is reading. This can't be avoided 88 * unless Consumer is fast enough and can always run in tandem with 89 * Producer. 90 */ 91 if (relay_buf_full(buf)) 92 return 0; 93 94 return 1; 95 } 96 97 /* 98 * file_create() callback. Creates relay file in debugfs. 99 */ 100 static struct dentry *create_buf_file_callback(const char *filename, 101 struct dentry *parent, 102 umode_t mode, 103 struct rchan_buf *buf, 104 int *is_global) 105 { 106 struct dentry *buf_file; 107 108 /* This to enable the use of a single buffer for the relay channel and 109 * correspondingly have a single file exposed to User, through which 110 * it can collect the logs in order without any post-processing. 111 * Need to set 'is_global' even if parent is NULL for early logging. 112 */ 113 *is_global = 1; 114 115 if (!parent) 116 return NULL; 117 118 /* Not using the channel filename passed as an argument, since for each 119 * channel relay appends the corresponding CPU number to the filename 120 * passed in relay_open(). This should be fine as relay just needs a 121 * dentry of the file associated with the channel buffer and that file's 122 * name need not be same as the filename passed as an argument. 123 */ 124 buf_file = debugfs_create_file("guc_log", mode, 125 parent, buf, &relay_file_operations); 126 return buf_file; 127 } 128 129 /* 130 * file_remove() default callback. Removes relay file in debugfs. 131 */ 132 static int remove_buf_file_callback(struct dentry *dentry) 133 { 134 debugfs_remove(dentry); 135 return 0; 136 } 137 138 /* relay channel callbacks */ 139 static struct rchan_callbacks relay_callbacks = { 140 .subbuf_start = subbuf_start_callback, 141 .create_buf_file = create_buf_file_callback, 142 .remove_buf_file = remove_buf_file_callback, 143 }; 144 145 static int guc_log_relay_file_create(struct intel_guc *guc) 146 { 147 struct drm_i915_private *dev_priv = guc_to_i915(guc); 148 struct dentry *log_dir; 149 int ret; 150 151 if (i915_modparams.guc_log_level < 0) 152 return 0; 153 154 /* For now create the log file in /sys/kernel/debug/dri/0 dir */ 155 log_dir = dev_priv->drm.primary->debugfs_root; 156 157 /* If /sys/kernel/debug/dri/0 location do not exist, then debugfs is 158 * not mounted and so can't create the relay file. 159 * The relay API seems to fit well with debugfs only, for availing relay 160 * there are 3 requirements which can be met for debugfs file only in a 161 * straightforward/clean manner :- 162 * i) Need the associated dentry pointer of the file, while opening the 163 * relay channel. 164 * ii) Should be able to use 'relay_file_operations' fops for the file. 165 * iii) Set the 'i_private' field of file's inode to the pointer of 166 * relay channel buffer. 167 */ 168 if (!log_dir) { 169 DRM_ERROR("Debugfs dir not available yet for GuC log file\n"); 170 return -ENODEV; 171 } 172 173 ret = relay_late_setup_files(guc->log.runtime.relay_chan, "guc_log", log_dir); 174 if (ret < 0 && ret != -EEXIST) { 175 DRM_ERROR("Couldn't associate relay chan with file %d\n", ret); 176 return ret; 177 } 178 179 return 0; 180 } 181 182 static void guc_move_to_next_buf(struct intel_guc *guc) 183 { 184 /* Make sure the updates made in the sub buffer are visible when 185 * Consumer sees the following update to offset inside the sub buffer. 186 */ 187 smp_wmb(); 188 189 /* All data has been written, so now move the offset of sub buffer. */ 190 relay_reserve(guc->log.runtime.relay_chan, guc->log.vma->obj->base.size); 191 192 /* Switch to the next sub buffer */ 193 relay_flush(guc->log.runtime.relay_chan); 194 } 195 196 static void *guc_get_write_buffer(struct intel_guc *guc) 197 { 198 if (!guc->log.runtime.relay_chan) 199 return NULL; 200 201 /* Just get the base address of a new sub buffer and copy data into it 202 * ourselves. NULL will be returned in no-overwrite mode, if all sub 203 * buffers are full. Could have used the relay_write() to indirectly 204 * copy the data, but that would have been bit convoluted, as we need to 205 * write to only certain locations inside a sub buffer which cannot be 206 * done without using relay_reserve() along with relay_write(). So its 207 * better to use relay_reserve() alone. 208 */ 209 return relay_reserve(guc->log.runtime.relay_chan, 0); 210 } 211 212 static bool guc_check_log_buf_overflow(struct intel_guc *guc, 213 enum guc_log_buffer_type type, 214 unsigned int full_cnt) 215 { 216 unsigned int prev_full_cnt = guc->log.prev_overflow_count[type]; 217 bool overflow = false; 218 219 if (full_cnt != prev_full_cnt) { 220 overflow = true; 221 222 guc->log.prev_overflow_count[type] = full_cnt; 223 guc->log.total_overflow_count[type] += full_cnt - prev_full_cnt; 224 225 if (full_cnt < prev_full_cnt) { 226 /* buffer_full_cnt is a 4 bit counter */ 227 guc->log.total_overflow_count[type] += 16; 228 } 229 DRM_ERROR_RATELIMITED("GuC log buffer overflow\n"); 230 } 231 232 return overflow; 233 } 234 235 static unsigned int guc_get_log_buffer_size(enum guc_log_buffer_type type) 236 { 237 switch (type) { 238 case GUC_ISR_LOG_BUFFER: 239 return (GUC_LOG_ISR_PAGES + 1) * PAGE_SIZE; 240 case GUC_DPC_LOG_BUFFER: 241 return (GUC_LOG_DPC_PAGES + 1) * PAGE_SIZE; 242 case GUC_CRASH_DUMP_LOG_BUFFER: 243 return (GUC_LOG_CRASH_PAGES + 1) * PAGE_SIZE; 244 default: 245 MISSING_CASE(type); 246 } 247 248 return 0; 249 } 250 251 static void guc_read_update_log_buffer(struct intel_guc *guc) 252 { 253 unsigned int buffer_size, read_offset, write_offset, bytes_to_copy, full_cnt; 254 struct guc_log_buffer_state *log_buf_state, *log_buf_snapshot_state; 255 struct guc_log_buffer_state log_buf_state_local; 256 enum guc_log_buffer_type type; 257 void *src_data, *dst_data; 258 bool new_overflow; 259 260 if (WARN_ON(!guc->log.runtime.buf_addr)) 261 return; 262 263 /* Get the pointer to shared GuC log buffer */ 264 log_buf_state = src_data = guc->log.runtime.buf_addr; 265 266 /* Get the pointer to local buffer to store the logs */ 267 log_buf_snapshot_state = dst_data = guc_get_write_buffer(guc); 268 269 /* Actual logs are present from the 2nd page */ 270 src_data += PAGE_SIZE; 271 dst_data += PAGE_SIZE; 272 273 for (type = GUC_ISR_LOG_BUFFER; type < GUC_MAX_LOG_BUFFER; type++) { 274 /* Make a copy of the state structure, inside GuC log buffer 275 * (which is uncached mapped), on the stack to avoid reading 276 * from it multiple times. 277 */ 278 memcpy(&log_buf_state_local, log_buf_state, 279 sizeof(struct guc_log_buffer_state)); 280 buffer_size = guc_get_log_buffer_size(type); 281 read_offset = log_buf_state_local.read_ptr; 282 write_offset = log_buf_state_local.sampled_write_ptr; 283 full_cnt = log_buf_state_local.buffer_full_cnt; 284 285 /* Bookkeeping stuff */ 286 guc->log.flush_count[type] += log_buf_state_local.flush_to_file; 287 new_overflow = guc_check_log_buf_overflow(guc, type, full_cnt); 288 289 /* Update the state of shared log buffer */ 290 log_buf_state->read_ptr = write_offset; 291 log_buf_state->flush_to_file = 0; 292 log_buf_state++; 293 294 if (unlikely(!log_buf_snapshot_state)) 295 continue; 296 297 /* First copy the state structure in snapshot buffer */ 298 memcpy(log_buf_snapshot_state, &log_buf_state_local, 299 sizeof(struct guc_log_buffer_state)); 300 301 /* The write pointer could have been updated by GuC firmware, 302 * after sending the flush interrupt to Host, for consistency 303 * set write pointer value to same value of sampled_write_ptr 304 * in the snapshot buffer. 305 */ 306 log_buf_snapshot_state->write_ptr = write_offset; 307 log_buf_snapshot_state++; 308 309 /* Now copy the actual logs. */ 310 if (unlikely(new_overflow)) { 311 /* copy the whole buffer in case of overflow */ 312 read_offset = 0; 313 write_offset = buffer_size; 314 } else if (unlikely((read_offset > buffer_size) || 315 (write_offset > buffer_size))) { 316 DRM_ERROR("invalid log buffer state\n"); 317 /* copy whole buffer as offsets are unreliable */ 318 read_offset = 0; 319 write_offset = buffer_size; 320 } 321 322 /* Just copy the newly written data */ 323 if (read_offset > write_offset) { 324 i915_memcpy_from_wc(dst_data, src_data, write_offset); 325 bytes_to_copy = buffer_size - read_offset; 326 } else { 327 bytes_to_copy = write_offset - read_offset; 328 } 329 i915_memcpy_from_wc(dst_data + read_offset, 330 src_data + read_offset, bytes_to_copy); 331 332 src_data += buffer_size; 333 dst_data += buffer_size; 334 } 335 336 if (log_buf_snapshot_state) 337 guc_move_to_next_buf(guc); 338 else { 339 /* Used rate limited to avoid deluge of messages, logs might be 340 * getting consumed by User at a slow rate. 341 */ 342 DRM_ERROR_RATELIMITED("no sub-buffer to capture logs\n"); 343 guc->log.capture_miss_count++; 344 } 345 } 346 347 static void capture_logs_work(struct work_struct *work) 348 { 349 struct intel_guc *guc = 350 container_of(work, struct intel_guc, log.runtime.flush_work); 351 352 guc_log_capture_logs(guc); 353 } 354 355 static bool guc_log_has_runtime(struct intel_guc *guc) 356 { 357 return guc->log.runtime.buf_addr != NULL; 358 } 359 360 static int guc_log_runtime_create(struct intel_guc *guc) 361 { 362 struct drm_i915_private *dev_priv = guc_to_i915(guc); 363 void *vaddr; 364 struct rchan *guc_log_relay_chan; 365 size_t n_subbufs, subbuf_size; 366 int ret; 367 368 lockdep_assert_held(&dev_priv->drm.struct_mutex); 369 370 GEM_BUG_ON(guc_log_has_runtime(guc)); 371 372 ret = i915_gem_object_set_to_wc_domain(guc->log.vma->obj, true); 373 if (ret) 374 return ret; 375 376 /* Create a WC (Uncached for read) vmalloc mapping of log 377 * buffer pages, so that we can directly get the data 378 * (up-to-date) from memory. 379 */ 380 vaddr = i915_gem_object_pin_map(guc->log.vma->obj, I915_MAP_WC); 381 if (IS_ERR(vaddr)) { 382 DRM_ERROR("Couldn't map log buffer pages %d\n", ret); 383 return PTR_ERR(vaddr); 384 } 385 386 guc->log.runtime.buf_addr = vaddr; 387 388 /* Keep the size of sub buffers same as shared log buffer */ 389 subbuf_size = guc->log.vma->obj->base.size; 390 391 /* Store up to 8 snapshots, which is large enough to buffer sufficient 392 * boot time logs and provides enough leeway to User, in terms of 393 * latency, for consuming the logs from relay. Also doesn't take 394 * up too much memory. 395 */ 396 n_subbufs = 8; 397 398 /* Create a relay channel, so that we have buffers for storing 399 * the GuC firmware logs, the channel will be linked with a file 400 * later on when debugfs is registered. 401 */ 402 guc_log_relay_chan = relay_open(NULL, NULL, subbuf_size, 403 n_subbufs, &relay_callbacks, dev_priv); 404 if (!guc_log_relay_chan) { 405 DRM_ERROR("Couldn't create relay chan for GuC logging\n"); 406 407 ret = -ENOMEM; 408 goto err_vaddr; 409 } 410 411 GEM_BUG_ON(guc_log_relay_chan->subbuf_size < subbuf_size); 412 guc->log.runtime.relay_chan = guc_log_relay_chan; 413 414 INIT_WORK(&guc->log.runtime.flush_work, capture_logs_work); 415 416 /* 417 * GuC log buffer flush work item has to do register access to 418 * send the ack to GuC and this work item, if not synced before 419 * suspend, can potentially get executed after the GFX device is 420 * suspended. 421 * By marking the WQ as freezable, we don't have to bother about 422 * flushing of this work item from the suspend hooks, the pending 423 * work item if any will be either executed before the suspend 424 * or scheduled later on resume. This way the handling of work 425 * item can be kept same between system suspend & rpm suspend. 426 */ 427 guc->log.runtime.flush_wq = alloc_ordered_workqueue("i915-guc_log", 428 WQ_HIGHPRI | WQ_FREEZABLE); 429 if (!guc->log.runtime.flush_wq) { 430 DRM_ERROR("Couldn't allocate the wq for GuC logging\n"); 431 ret = -ENOMEM; 432 goto err_relaychan; 433 } 434 435 return 0; 436 437 err_relaychan: 438 relay_close(guc->log.runtime.relay_chan); 439 err_vaddr: 440 i915_gem_object_unpin_map(guc->log.vma->obj); 441 guc->log.runtime.buf_addr = NULL; 442 return ret; 443 } 444 445 static void guc_log_runtime_destroy(struct intel_guc *guc) 446 { 447 /* 448 * It's possible that the runtime stuff was never allocated because 449 * guc_log_level was < 0 at the time 450 **/ 451 if (!guc_log_has_runtime(guc)) 452 return; 453 454 destroy_workqueue(guc->log.runtime.flush_wq); 455 relay_close(guc->log.runtime.relay_chan); 456 i915_gem_object_unpin_map(guc->log.vma->obj); 457 guc->log.runtime.buf_addr = NULL; 458 } 459 460 static int guc_log_late_setup(struct intel_guc *guc) 461 { 462 struct drm_i915_private *dev_priv = guc_to_i915(guc); 463 int ret; 464 465 lockdep_assert_held(&dev_priv->drm.struct_mutex); 466 467 if (!guc_log_has_runtime(guc)) { 468 /* If log_level was set as -1 at boot time, then setup needed to 469 * handle log buffer flush interrupts would not have been done yet, 470 * so do that now. 471 */ 472 ret = guc_log_runtime_create(guc); 473 if (ret) 474 goto err; 475 } 476 477 ret = guc_log_relay_file_create(guc); 478 if (ret) 479 goto err_runtime; 480 481 return 0; 482 483 err_runtime: 484 guc_log_runtime_destroy(guc); 485 err: 486 /* logging will remain off */ 487 i915_modparams.guc_log_level = -1; 488 return ret; 489 } 490 491 static void guc_log_capture_logs(struct intel_guc *guc) 492 { 493 struct drm_i915_private *dev_priv = guc_to_i915(guc); 494 495 guc_read_update_log_buffer(guc); 496 497 /* Generally device is expected to be active only at this 498 * time, so get/put should be really quick. 499 */ 500 intel_runtime_pm_get(dev_priv); 501 guc_log_flush_complete(guc); 502 intel_runtime_pm_put(dev_priv); 503 } 504 505 static void guc_flush_logs(struct intel_guc *guc) 506 { 507 struct drm_i915_private *dev_priv = guc_to_i915(guc); 508 509 if (!i915_modparams.enable_guc_submission || 510 (i915_modparams.guc_log_level < 0)) 511 return; 512 513 /* First disable the interrupts, will be renabled afterwards */ 514 gen9_disable_guc_interrupts(dev_priv); 515 516 /* Before initiating the forceful flush, wait for any pending/ongoing 517 * flush to complete otherwise forceful flush may not actually happen. 518 */ 519 flush_work(&guc->log.runtime.flush_work); 520 521 /* Ask GuC to update the log buffer state */ 522 guc_log_flush(guc); 523 524 /* GuC would have updated log buffer by now, so capture it */ 525 guc_log_capture_logs(guc); 526 } 527 #endif 528 529 int intel_guc_log_create(struct intel_guc *guc) 530 { 531 struct i915_vma *vma; 532 unsigned long offset; 533 u32 flags; 534 u32 size; 535 int ret; 536 537 GEM_BUG_ON(guc->log.vma); 538 539 if (i915_modparams.guc_log_level > GUC_LOG_VERBOSITY_MAX) 540 i915_modparams.guc_log_level = GUC_LOG_VERBOSITY_MAX; 541 542 /* The first page is to save log buffer state. Allocate one 543 * extra page for others in case for overlap */ 544 size = (1 + GUC_LOG_DPC_PAGES + 1 + 545 GUC_LOG_ISR_PAGES + 1 + 546 GUC_LOG_CRASH_PAGES + 1) << PAGE_SHIFT; 547 548 /* We require SSE 4.1 for fast reads from the GuC log buffer and 549 * it should be present on the chipsets supporting GuC based 550 * submisssions. 551 */ 552 if (WARN_ON(!i915_has_memcpy_from_wc())) { 553 ret = -EINVAL; 554 goto err; 555 } 556 557 vma = intel_guc_allocate_vma(guc, size); 558 if (IS_ERR(vma)) { 559 ret = PTR_ERR(vma); 560 goto err; 561 } 562 563 guc->log.vma = vma; 564 565 #if 0 566 if (i915.guc_log_level >= 0) { 567 ret = guc_log_runtime_create(guc); 568 if (ret < 0) 569 goto err_vma; 570 } 571 #endif 572 573 /* each allocated unit is a page */ 574 flags = GUC_LOG_VALID | GUC_LOG_NOTIFY_ON_HALF_FULL | 575 (GUC_LOG_DPC_PAGES << GUC_LOG_DPC_SHIFT) | 576 (GUC_LOG_ISR_PAGES << GUC_LOG_ISR_SHIFT) | 577 (GUC_LOG_CRASH_PAGES << GUC_LOG_CRASH_SHIFT); 578 579 offset = guc_ggtt_offset(vma) >> PAGE_SHIFT; /* in pages */ 580 guc->log.flags = (offset << GUC_LOG_BUF_ADDR_SHIFT) | flags; 581 582 return 0; 583 584 #if 0 585 err_vma: 586 i915_vma_unpin_and_release(&guc->log.vma); 587 #endif 588 err: 589 /* logging will be off */ 590 i915_modparams.guc_log_level = -1; 591 return ret; 592 } 593 594 void intel_guc_log_destroy(struct intel_guc *guc) 595 { 596 #if 0 597 guc_log_runtime_destroy(guc); 598 #endif 599 i915_vma_unpin_and_release(&guc->log.vma); 600 } 601 602 #if 0 603 int i915_guc_log_control(struct drm_i915_private *dev_priv, u64 control_val) 604 { 605 struct intel_guc *guc = &dev_priv->guc; 606 607 union guc_log_control log_param; 608 int ret; 609 610 log_param.value = control_val; 611 612 if (log_param.verbosity < GUC_LOG_VERBOSITY_MIN || 613 log_param.verbosity > GUC_LOG_VERBOSITY_MAX) 614 return -EINVAL; 615 616 /* This combination doesn't make sense & won't have any effect */ 617 if (!log_param.logging_enabled && (i915_modparams.guc_log_level < 0)) 618 return 0; 619 620 ret = guc_log_control(guc, log_param.value); 621 if (ret < 0) { 622 DRM_DEBUG_DRIVER("guc_logging_control action failed %d\n", ret); 623 return ret; 624 } 625 626 if (log_param.logging_enabled) { 627 i915_modparams.guc_log_level = log_param.verbosity; 628 629 /* If log_level was set as -1 at boot time, then the relay channel file 630 * wouldn't have been created by now and interrupts also would not have 631 * been enabled. Try again now, just in case. 632 */ 633 ret = guc_log_late_setup(guc); 634 if (ret < 0) { 635 DRM_DEBUG_DRIVER("GuC log late setup failed %d\n", ret); 636 return ret; 637 } 638 639 /* GuC logging is currently the only user of Guc2Host interrupts */ 640 gen9_enable_guc_interrupts(dev_priv); 641 } else { 642 /* Once logging is disabled, GuC won't generate logs & send an 643 * interrupt. But there could be some data in the log buffer 644 * which is yet to be captured. So request GuC to update the log 645 * buffer state and then collect the left over logs. 646 */ 647 guc_flush_logs(guc); 648 649 /* As logging is disabled, update log level to reflect that */ 650 i915_modparams.guc_log_level = -1; 651 } 652 653 return ret; 654 } 655 #endif 656 657 void i915_guc_log_register(struct drm_i915_private *dev_priv) 658 { 659 if (!i915_modparams.enable_guc_submission || 660 (i915_modparams.guc_log_level < 0)) 661 return; 662 663 mutex_lock(&dev_priv->drm.struct_mutex); 664 #if 0 665 guc_log_late_setup(&dev_priv->guc); 666 #endif 667 mutex_unlock(&dev_priv->drm.struct_mutex); 668 } 669 670 void i915_guc_log_unregister(struct drm_i915_private *dev_priv) 671 { 672 if (!i915_modparams.enable_guc_submission) 673 return; 674 675 mutex_lock(&dev_priv->drm.struct_mutex); 676 /* GuC logging is currently the only user of Guc2Host interrupts */ 677 gen9_disable_guc_interrupts(dev_priv); 678 #if 0 679 guc_log_runtime_destroy(&dev_priv->guc); 680 #endif 681 mutex_unlock(&dev_priv->drm.struct_mutex); 682 } 683