xref: /openbmc/linux/drivers/gpu/drm/i915/gt/uc/intel_uc.c (revision d59ce1ff)
1 // SPDX-License-Identifier: MIT
2 /*
3  * Copyright © 2016-2019 Intel Corporation
4  */
5 
6 #include <linux/string_helpers.h>
7 
8 #include "gt/intel_gt.h"
9 #include "gt/intel_gt_print.h"
10 #include "gt/intel_reset.h"
11 #include "intel_gsc_fw.h"
12 #include "intel_gsc_uc.h"
13 #include "intel_guc.h"
14 #include "intel_guc_ads.h"
15 #include "intel_guc_print.h"
16 #include "intel_guc_submission.h"
17 #include "gt/intel_rps.h"
18 #include "intel_uc.h"
19 
20 #include "i915_drv.h"
21 #include "i915_hwmon.h"
22 
23 static const struct intel_uc_ops uc_ops_off;
24 static const struct intel_uc_ops uc_ops_on;
25 
26 static void uc_expand_default_options(struct intel_uc *uc)
27 {
28 	struct drm_i915_private *i915 = uc_to_gt(uc)->i915;
29 
30 	if (i915->params.enable_guc != -1)
31 		return;
32 
33 	/* Don't enable GuC/HuC on pre-Gen12 */
34 	if (GRAPHICS_VER(i915) < 12) {
35 		i915->params.enable_guc = 0;
36 		return;
37 	}
38 
39 	/* Don't enable GuC/HuC on older Gen12 platforms */
40 	if (IS_TIGERLAKE(i915) || IS_ROCKETLAKE(i915)) {
41 		i915->params.enable_guc = 0;
42 		return;
43 	}
44 
45 	/* Intermediate platforms are HuC authentication only */
46 	if (IS_ALDERLAKE_S(i915) && !IS_ADLS_RPLS(i915)) {
47 		i915->params.enable_guc = ENABLE_GUC_LOAD_HUC;
48 		return;
49 	}
50 
51 	/* Default: enable HuC authentication and GuC submission */
52 	i915->params.enable_guc = ENABLE_GUC_LOAD_HUC | ENABLE_GUC_SUBMISSION;
53 
54 	/* XEHPSDV and PVC do not use HuC */
55 	if (IS_XEHPSDV(i915) || IS_PONTEVECCHIO(i915))
56 		i915->params.enable_guc &= ~ENABLE_GUC_LOAD_HUC;
57 }
58 
59 /* Reset GuC providing us with fresh state for both GuC and HuC.
60  */
61 static int __intel_uc_reset_hw(struct intel_uc *uc)
62 {
63 	struct intel_gt *gt = uc_to_gt(uc);
64 	int ret;
65 	u32 guc_status;
66 
67 	ret = i915_inject_probe_error(gt->i915, -ENXIO);
68 	if (ret)
69 		return ret;
70 
71 	ret = intel_reset_guc(gt);
72 	if (ret) {
73 		gt_err(gt, "Failed to reset GuC, ret = %d\n", ret);
74 		return ret;
75 	}
76 
77 	guc_status = intel_uncore_read(gt->uncore, GUC_STATUS);
78 	gt_WARN(gt, !(guc_status & GS_MIA_IN_RESET),
79 		"GuC status: 0x%x, MIA core expected to be in reset\n",
80 		guc_status);
81 
82 	return ret;
83 }
84 
85 static void __confirm_options(struct intel_uc *uc)
86 {
87 	struct intel_gt *gt = uc_to_gt(uc);
88 	struct drm_i915_private *i915 = gt->i915;
89 
90 	gt_dbg(gt, "enable_guc=%d (guc:%s submission:%s huc:%s slpc:%s)\n",
91 	       i915->params.enable_guc,
92 	       str_yes_no(intel_uc_wants_guc(uc)),
93 	       str_yes_no(intel_uc_wants_guc_submission(uc)),
94 	       str_yes_no(intel_uc_wants_huc(uc)),
95 	       str_yes_no(intel_uc_wants_guc_slpc(uc)));
96 
97 	if (i915->params.enable_guc == 0) {
98 		GEM_BUG_ON(intel_uc_wants_guc(uc));
99 		GEM_BUG_ON(intel_uc_wants_guc_submission(uc));
100 		GEM_BUG_ON(intel_uc_wants_huc(uc));
101 		GEM_BUG_ON(intel_uc_wants_guc_slpc(uc));
102 		return;
103 	}
104 
105 	if (!intel_uc_supports_guc(uc))
106 		gt_info(gt,  "Incompatible option enable_guc=%d - %s\n",
107 			i915->params.enable_guc, "GuC is not supported!");
108 
109 	if (i915->params.enable_guc & ENABLE_GUC_LOAD_HUC &&
110 	    !intel_uc_supports_huc(uc))
111 		gt_info(gt, "Incompatible option enable_guc=%d - %s\n",
112 			i915->params.enable_guc, "HuC is not supported!");
113 
114 	if (i915->params.enable_guc & ENABLE_GUC_SUBMISSION &&
115 	    !intel_uc_supports_guc_submission(uc))
116 		gt_info(gt, "Incompatible option enable_guc=%d - %s\n",
117 			i915->params.enable_guc, "GuC submission is N/A");
118 
119 	if (i915->params.enable_guc & ~ENABLE_GUC_MASK)
120 		gt_info(gt, "Incompatible option enable_guc=%d - %s\n",
121 			i915->params.enable_guc, "undocumented flag");
122 }
123 
124 void intel_uc_init_early(struct intel_uc *uc)
125 {
126 	uc_expand_default_options(uc);
127 
128 	intel_guc_init_early(&uc->guc);
129 	intel_huc_init_early(&uc->huc);
130 	intel_gsc_uc_init_early(&uc->gsc);
131 
132 	__confirm_options(uc);
133 
134 	if (intel_uc_wants_guc(uc))
135 		uc->ops = &uc_ops_on;
136 	else
137 		uc->ops = &uc_ops_off;
138 }
139 
140 void intel_uc_init_late(struct intel_uc *uc)
141 {
142 	intel_guc_init_late(&uc->guc);
143 	intel_gsc_uc_load_start(&uc->gsc);
144 }
145 
146 void intel_uc_driver_late_release(struct intel_uc *uc)
147 {
148 }
149 
150 /**
151  * intel_uc_init_mmio - setup uC MMIO access
152  * @uc: the intel_uc structure
153  *
154  * Setup minimal state necessary for MMIO accesses later in the
155  * initialization sequence.
156  */
157 void intel_uc_init_mmio(struct intel_uc *uc)
158 {
159 	intel_guc_init_send_regs(&uc->guc);
160 }
161 
162 static void __uc_capture_load_err_log(struct intel_uc *uc)
163 {
164 	struct intel_guc *guc = &uc->guc;
165 
166 	if (guc->log.vma && !uc->load_err_log)
167 		uc->load_err_log = i915_gem_object_get(guc->log.vma->obj);
168 }
169 
170 static void __uc_free_load_err_log(struct intel_uc *uc)
171 {
172 	struct drm_i915_gem_object *log = fetch_and_zero(&uc->load_err_log);
173 
174 	if (log)
175 		i915_gem_object_put(log);
176 }
177 
178 void intel_uc_driver_remove(struct intel_uc *uc)
179 {
180 	intel_uc_fini_hw(uc);
181 	intel_uc_fini(uc);
182 	__uc_free_load_err_log(uc);
183 }
184 
185 /*
186  * Events triggered while CT buffers are disabled are logged in the SCRATCH_15
187  * register using the same bits used in the CT message payload. Since our
188  * communication channel with guc is turned off at this point, we can save the
189  * message and handle it after we turn it back on.
190  */
191 static void guc_clear_mmio_msg(struct intel_guc *guc)
192 {
193 	intel_uncore_write(guc_to_gt(guc)->uncore, SOFT_SCRATCH(15), 0);
194 }
195 
196 static void guc_get_mmio_msg(struct intel_guc *guc)
197 {
198 	u32 val;
199 
200 	spin_lock_irq(&guc->irq_lock);
201 
202 	val = intel_uncore_read(guc_to_gt(guc)->uncore, SOFT_SCRATCH(15));
203 	guc->mmio_msg |= val & guc->msg_enabled_mask;
204 
205 	/*
206 	 * clear all events, including the ones we're not currently servicing,
207 	 * to make sure we don't try to process a stale message if we enable
208 	 * handling of more events later.
209 	 */
210 	guc_clear_mmio_msg(guc);
211 
212 	spin_unlock_irq(&guc->irq_lock);
213 }
214 
215 static void guc_handle_mmio_msg(struct intel_guc *guc)
216 {
217 	/* we need communication to be enabled to reply to GuC */
218 	GEM_BUG_ON(!intel_guc_ct_enabled(&guc->ct));
219 
220 	spin_lock_irq(&guc->irq_lock);
221 	if (guc->mmio_msg) {
222 		intel_guc_to_host_process_recv_msg(guc, &guc->mmio_msg, 1);
223 		guc->mmio_msg = 0;
224 	}
225 	spin_unlock_irq(&guc->irq_lock);
226 }
227 
228 static int guc_enable_communication(struct intel_guc *guc)
229 {
230 	struct intel_gt *gt = guc_to_gt(guc);
231 	struct drm_i915_private *i915 = gt->i915;
232 	int ret;
233 
234 	GEM_BUG_ON(intel_guc_ct_enabled(&guc->ct));
235 
236 	ret = i915_inject_probe_error(i915, -ENXIO);
237 	if (ret)
238 		return ret;
239 
240 	ret = intel_guc_ct_enable(&guc->ct);
241 	if (ret)
242 		return ret;
243 
244 	/* check for mmio messages received before/during the CT enable */
245 	guc_get_mmio_msg(guc);
246 	guc_handle_mmio_msg(guc);
247 
248 	intel_guc_enable_interrupts(guc);
249 
250 	/* check for CT messages received before we enabled interrupts */
251 	spin_lock_irq(gt->irq_lock);
252 	intel_guc_ct_event_handler(&guc->ct);
253 	spin_unlock_irq(gt->irq_lock);
254 
255 	guc_dbg(guc, "communication enabled\n");
256 
257 	return 0;
258 }
259 
260 static void guc_disable_communication(struct intel_guc *guc)
261 {
262 	/*
263 	 * Events generated during or after CT disable are logged by guc in
264 	 * via mmio. Make sure the register is clear before disabling CT since
265 	 * all events we cared about have already been processed via CT.
266 	 */
267 	guc_clear_mmio_msg(guc);
268 
269 	intel_guc_disable_interrupts(guc);
270 
271 	intel_guc_ct_disable(&guc->ct);
272 
273 	/*
274 	 * Check for messages received during/after the CT disable. We do not
275 	 * expect any messages to have arrived via CT between the interrupt
276 	 * disable and the CT disable because GuC should've been idle until we
277 	 * triggered the CT disable protocol.
278 	 */
279 	guc_get_mmio_msg(guc);
280 
281 	guc_dbg(guc, "communication disabled\n");
282 }
283 
284 static void __uc_fetch_firmwares(struct intel_uc *uc)
285 {
286 	struct intel_gt *gt = uc_to_gt(uc);
287 	int err;
288 
289 	GEM_BUG_ON(!intel_uc_wants_guc(uc));
290 
291 	err = intel_uc_fw_fetch(&uc->guc.fw);
292 	if (err) {
293 		/* Make sure we transition out of transient "SELECTED" state */
294 		if (intel_uc_wants_huc(uc)) {
295 			gt_dbg(gt, "Failed to fetch GuC fw (%pe) disabling HuC\n", ERR_PTR(err));
296 			intel_uc_fw_change_status(&uc->huc.fw,
297 						  INTEL_UC_FIRMWARE_ERROR);
298 		}
299 
300 		if (intel_uc_wants_gsc_uc(uc)) {
301 			gt_dbg(gt, "Failed to fetch GuC fw (%pe) disabling GSC\n", ERR_PTR(err));
302 			intel_uc_fw_change_status(&uc->gsc.fw,
303 						  INTEL_UC_FIRMWARE_ERROR);
304 		}
305 
306 		return;
307 	}
308 
309 	if (intel_uc_wants_huc(uc))
310 		intel_uc_fw_fetch(&uc->huc.fw);
311 
312 	if (intel_uc_wants_gsc_uc(uc))
313 		intel_uc_fw_fetch(&uc->gsc.fw);
314 }
315 
316 static void __uc_cleanup_firmwares(struct intel_uc *uc)
317 {
318 	intel_uc_fw_cleanup_fetch(&uc->gsc.fw);
319 	intel_uc_fw_cleanup_fetch(&uc->huc.fw);
320 	intel_uc_fw_cleanup_fetch(&uc->guc.fw);
321 }
322 
323 static int __uc_init(struct intel_uc *uc)
324 {
325 	struct intel_guc *guc = &uc->guc;
326 	struct intel_huc *huc = &uc->huc;
327 	int ret;
328 
329 	GEM_BUG_ON(!intel_uc_wants_guc(uc));
330 
331 	if (!intel_uc_uses_guc(uc))
332 		return 0;
333 
334 	if (i915_inject_probe_failure(uc_to_gt(uc)->i915))
335 		return -ENOMEM;
336 
337 	ret = intel_guc_init(guc);
338 	if (ret)
339 		return ret;
340 
341 	if (intel_uc_uses_huc(uc))
342 		intel_huc_init(huc);
343 
344 	if (intel_uc_uses_gsc_uc(uc))
345 		intel_gsc_uc_init(&uc->gsc);
346 
347 	return 0;
348 }
349 
350 static void __uc_fini(struct intel_uc *uc)
351 {
352 	intel_gsc_uc_fini(&uc->gsc);
353 	intel_huc_fini(&uc->huc);
354 	intel_guc_fini(&uc->guc);
355 }
356 
357 static int __uc_sanitize(struct intel_uc *uc)
358 {
359 	struct intel_guc *guc = &uc->guc;
360 	struct intel_huc *huc = &uc->huc;
361 
362 	GEM_BUG_ON(!intel_uc_supports_guc(uc));
363 
364 	intel_huc_sanitize(huc);
365 	intel_guc_sanitize(guc);
366 
367 	return __intel_uc_reset_hw(uc);
368 }
369 
370 /* Initialize and verify the uC regs related to uC positioning in WOPCM */
371 static int uc_init_wopcm(struct intel_uc *uc)
372 {
373 	struct intel_gt *gt = uc_to_gt(uc);
374 	struct intel_uncore *uncore = gt->uncore;
375 	u32 base = intel_wopcm_guc_base(&gt->wopcm);
376 	u32 size = intel_wopcm_guc_size(&gt->wopcm);
377 	u32 huc_agent = intel_uc_uses_huc(uc) ? HUC_LOADING_AGENT_GUC : 0;
378 	u32 mask;
379 	int err;
380 
381 	if (unlikely(!base || !size)) {
382 		gt_probe_error(gt, "Unsuccessful WOPCM partitioning\n");
383 		return -E2BIG;
384 	}
385 
386 	GEM_BUG_ON(!intel_uc_supports_guc(uc));
387 	GEM_BUG_ON(!(base & GUC_WOPCM_OFFSET_MASK));
388 	GEM_BUG_ON(base & ~GUC_WOPCM_OFFSET_MASK);
389 	GEM_BUG_ON(!(size & GUC_WOPCM_SIZE_MASK));
390 	GEM_BUG_ON(size & ~GUC_WOPCM_SIZE_MASK);
391 
392 	err = i915_inject_probe_error(gt->i915, -ENXIO);
393 	if (err)
394 		return err;
395 
396 	mask = GUC_WOPCM_SIZE_MASK | GUC_WOPCM_SIZE_LOCKED;
397 	err = intel_uncore_write_and_verify(uncore, GUC_WOPCM_SIZE, size, mask,
398 					    size | GUC_WOPCM_SIZE_LOCKED);
399 	if (err)
400 		goto err_out;
401 
402 	mask = GUC_WOPCM_OFFSET_MASK | GUC_WOPCM_OFFSET_VALID | huc_agent;
403 	err = intel_uncore_write_and_verify(uncore, DMA_GUC_WOPCM_OFFSET,
404 					    base | huc_agent, mask,
405 					    base | huc_agent |
406 					    GUC_WOPCM_OFFSET_VALID);
407 	if (err)
408 		goto err_out;
409 
410 	return 0;
411 
412 err_out:
413 	gt_probe_error(gt, "Failed to init uC WOPCM registers!\n");
414 	gt_probe_error(gt, "%s(%#x)=%#x\n", "DMA_GUC_WOPCM_OFFSET",
415 		       i915_mmio_reg_offset(DMA_GUC_WOPCM_OFFSET),
416 		       intel_uncore_read(uncore, DMA_GUC_WOPCM_OFFSET));
417 	gt_probe_error(gt, "%s(%#x)=%#x\n", "GUC_WOPCM_SIZE",
418 		       i915_mmio_reg_offset(GUC_WOPCM_SIZE),
419 		       intel_uncore_read(uncore, GUC_WOPCM_SIZE));
420 
421 	return err;
422 }
423 
424 static bool uc_is_wopcm_locked(struct intel_uc *uc)
425 {
426 	struct intel_gt *gt = uc_to_gt(uc);
427 	struct intel_uncore *uncore = gt->uncore;
428 
429 	return (intel_uncore_read(uncore, GUC_WOPCM_SIZE) & GUC_WOPCM_SIZE_LOCKED) ||
430 	       (intel_uncore_read(uncore, DMA_GUC_WOPCM_OFFSET) & GUC_WOPCM_OFFSET_VALID);
431 }
432 
433 static int __uc_check_hw(struct intel_uc *uc)
434 {
435 	if (!intel_uc_supports_guc(uc))
436 		return 0;
437 
438 	/*
439 	 * We can silently continue without GuC only if it was never enabled
440 	 * before on this system after reboot, otherwise we risk GPU hangs.
441 	 * To check if GuC was loaded before we look at WOPCM registers.
442 	 */
443 	if (uc_is_wopcm_locked(uc))
444 		return -EIO;
445 
446 	return 0;
447 }
448 
449 static void print_fw_ver(struct intel_gt *gt, struct intel_uc_fw *fw)
450 {
451 	gt_info(gt, "%s firmware %s version %u.%u.%u\n",
452 		intel_uc_fw_type_repr(fw->type), fw->file_selected.path,
453 		fw->file_selected.ver.major,
454 		fw->file_selected.ver.minor,
455 		fw->file_selected.ver.patch);
456 }
457 
458 static int __uc_init_hw(struct intel_uc *uc)
459 {
460 	struct intel_gt *gt = uc_to_gt(uc);
461 	struct drm_i915_private *i915 = gt->i915;
462 	struct intel_guc *guc = &uc->guc;
463 	struct intel_huc *huc = &uc->huc;
464 	int ret, attempts;
465 	bool pl1en;
466 
467 	GEM_BUG_ON(!intel_uc_supports_guc(uc));
468 	GEM_BUG_ON(!intel_uc_wants_guc(uc));
469 
470 	print_fw_ver(gt, &guc->fw);
471 
472 	if (intel_uc_uses_huc(uc))
473 		print_fw_ver(gt, &huc->fw);
474 
475 	if (!intel_uc_fw_is_loadable(&guc->fw)) {
476 		ret = __uc_check_hw(uc) ||
477 		      intel_uc_fw_is_overridden(&guc->fw) ||
478 		      intel_uc_wants_guc_submission(uc) ?
479 		      intel_uc_fw_status_to_error(guc->fw.status) : 0;
480 		goto err_out;
481 	}
482 
483 	ret = uc_init_wopcm(uc);
484 	if (ret)
485 		goto err_out;
486 
487 	intel_guc_reset_interrupts(guc);
488 
489 	/* WaEnableuKernelHeaderValidFix:skl */
490 	/* WaEnableGuCBootHashCheckNotSet:skl,bxt,kbl */
491 	if (GRAPHICS_VER(i915) == 9)
492 		attempts = 3;
493 	else
494 		attempts = 1;
495 
496 	/* Disable a potentially low PL1 power limit to allow freq to be raised */
497 	i915_hwmon_power_max_disable(gt->i915, &pl1en);
498 
499 	intel_rps_raise_unslice(&uc_to_gt(uc)->rps);
500 
501 	while (attempts--) {
502 		/*
503 		 * Always reset the GuC just before (re)loading, so
504 		 * that the state and timing are fairly predictable
505 		 */
506 		ret = __uc_sanitize(uc);
507 		if (ret)
508 			goto err_rps;
509 
510 		intel_huc_fw_upload(huc);
511 		intel_guc_ads_reset(guc);
512 		intel_guc_write_params(guc);
513 		ret = intel_guc_fw_upload(guc);
514 		if (ret == 0)
515 			break;
516 
517 		gt_dbg(gt, "GuC fw load failed (%pe) will reset and retry %d more time(s)\n",
518 		       ERR_PTR(ret), attempts);
519 	}
520 
521 	/* Did we succeded or run out of retries? */
522 	if (ret)
523 		goto err_log_capture;
524 
525 	ret = guc_enable_communication(guc);
526 	if (ret)
527 		goto err_log_capture;
528 
529 	/*
530 	 * GSC-loaded HuC is authenticated by the GSC, so we don't need to
531 	 * trigger the auth here. However, given that the HuC loaded this way
532 	 * survive GT reset, we still need to update our SW bookkeeping to make
533 	 * sure it reflects the correct HW status.
534 	 */
535 	if (intel_huc_is_loaded_by_gsc(huc))
536 		intel_huc_update_auth_status(huc);
537 	else
538 		intel_huc_auth(huc);
539 
540 	if (intel_uc_uses_guc_submission(uc)) {
541 		ret = intel_guc_submission_enable(guc);
542 		if (ret)
543 			goto err_log_capture;
544 	}
545 
546 	if (intel_uc_uses_guc_slpc(uc)) {
547 		ret = intel_guc_slpc_enable(&guc->slpc);
548 		if (ret)
549 			goto err_submission;
550 	} else {
551 		/* Restore GT back to RPn for non-SLPC path */
552 		intel_rps_lower_unslice(&uc_to_gt(uc)->rps);
553 	}
554 
555 	i915_hwmon_power_max_restore(gt->i915, pl1en);
556 
557 	guc_info(guc, "submission %s\n", str_enabled_disabled(intel_uc_uses_guc_submission(uc)));
558 	guc_info(guc, "SLPC %s\n", str_enabled_disabled(intel_uc_uses_guc_slpc(uc)));
559 
560 	return 0;
561 
562 	/*
563 	 * We've failed to load the firmware :(
564 	 */
565 err_submission:
566 	intel_guc_submission_disable(guc);
567 err_log_capture:
568 	__uc_capture_load_err_log(uc);
569 err_rps:
570 	/* Return GT back to RPn */
571 	intel_rps_lower_unslice(&uc_to_gt(uc)->rps);
572 
573 	i915_hwmon_power_max_restore(gt->i915, pl1en);
574 err_out:
575 	__uc_sanitize(uc);
576 
577 	if (!ret) {
578 		gt_notice(gt, "GuC is uninitialized\n");
579 		/* We want to run without GuC submission */
580 		return 0;
581 	}
582 
583 	gt_probe_error(gt, "GuC initialization failed %pe\n", ERR_PTR(ret));
584 
585 	/* We want to keep KMS alive */
586 	return -EIO;
587 }
588 
589 static void __uc_fini_hw(struct intel_uc *uc)
590 {
591 	struct intel_guc *guc = &uc->guc;
592 
593 	if (!intel_guc_is_fw_running(guc))
594 		return;
595 
596 	if (intel_uc_uses_guc_submission(uc))
597 		intel_guc_submission_disable(guc);
598 
599 	__uc_sanitize(uc);
600 }
601 
602 /**
603  * intel_uc_reset_prepare - Prepare for reset
604  * @uc: the intel_uc structure
605  *
606  * Preparing for full gpu reset.
607  */
608 void intel_uc_reset_prepare(struct intel_uc *uc)
609 {
610 	struct intel_guc *guc = &uc->guc;
611 
612 	uc->reset_in_progress = true;
613 
614 	/* Nothing to do if GuC isn't supported */
615 	if (!intel_uc_supports_guc(uc))
616 		return;
617 
618 	/* Firmware expected to be running when this function is called */
619 	if (!intel_guc_is_ready(guc))
620 		goto sanitize;
621 
622 	if (intel_uc_uses_guc_submission(uc))
623 		intel_guc_submission_reset_prepare(guc);
624 
625 sanitize:
626 	__uc_sanitize(uc);
627 }
628 
629 void intel_uc_reset(struct intel_uc *uc, intel_engine_mask_t stalled)
630 {
631 	struct intel_guc *guc = &uc->guc;
632 
633 	/* Firmware can not be running when this function is called  */
634 	if (intel_uc_uses_guc_submission(uc))
635 		intel_guc_submission_reset(guc, stalled);
636 }
637 
638 void intel_uc_reset_finish(struct intel_uc *uc)
639 {
640 	struct intel_guc *guc = &uc->guc;
641 
642 	uc->reset_in_progress = false;
643 
644 	/* Firmware expected to be running when this function is called */
645 	if (intel_guc_is_fw_running(guc) && intel_uc_uses_guc_submission(uc))
646 		intel_guc_submission_reset_finish(guc);
647 }
648 
649 void intel_uc_cancel_requests(struct intel_uc *uc)
650 {
651 	struct intel_guc *guc = &uc->guc;
652 
653 	/* Firmware can not be running when this function is called  */
654 	if (intel_uc_uses_guc_submission(uc))
655 		intel_guc_submission_cancel_requests(guc);
656 }
657 
658 void intel_uc_runtime_suspend(struct intel_uc *uc)
659 {
660 	struct intel_guc *guc = &uc->guc;
661 
662 	if (!intel_guc_is_ready(guc)) {
663 		guc->interrupts.enabled = false;
664 		return;
665 	}
666 
667 	/*
668 	 * Wait for any outstanding CTB before tearing down communication /w the
669 	 * GuC.
670 	 */
671 #define OUTSTANDING_CTB_TIMEOUT_PERIOD	(HZ / 5)
672 	intel_guc_wait_for_pending_msg(guc, &guc->outstanding_submission_g2h,
673 				       false, OUTSTANDING_CTB_TIMEOUT_PERIOD);
674 	GEM_WARN_ON(atomic_read(&guc->outstanding_submission_g2h));
675 
676 	guc_disable_communication(guc);
677 }
678 
679 void intel_uc_suspend(struct intel_uc *uc)
680 {
681 	struct intel_guc *guc = &uc->guc;
682 	intel_wakeref_t wakeref;
683 	int err;
684 
685 	/* flush the GSC worker */
686 	intel_gsc_uc_flush_work(&uc->gsc);
687 
688 	if (!intel_guc_is_ready(guc)) {
689 		guc->interrupts.enabled = false;
690 		return;
691 	}
692 
693 	with_intel_runtime_pm(&uc_to_gt(uc)->i915->runtime_pm, wakeref) {
694 		err = intel_guc_suspend(guc);
695 		if (err)
696 			guc_dbg(guc, "Failed to suspend, %pe", ERR_PTR(err));
697 	}
698 }
699 
700 static int __uc_resume(struct intel_uc *uc, bool enable_communication)
701 {
702 	struct intel_guc *guc = &uc->guc;
703 	struct intel_gt *gt = guc_to_gt(guc);
704 	int err;
705 
706 	if (!intel_guc_is_fw_running(guc))
707 		return 0;
708 
709 	/* Make sure we enable communication if and only if it's disabled */
710 	GEM_BUG_ON(enable_communication == intel_guc_ct_enabled(&guc->ct));
711 
712 	if (enable_communication)
713 		guc_enable_communication(guc);
714 
715 	/* If we are only resuming GuC communication but not reloading
716 	 * GuC, we need to ensure the ARAT timer interrupt is enabled
717 	 * again. In case of GuC reload, it is enabled during SLPC enable.
718 	 */
719 	if (enable_communication && intel_uc_uses_guc_slpc(uc))
720 		intel_guc_pm_intrmsk_enable(gt);
721 
722 	err = intel_guc_resume(guc);
723 	if (err) {
724 		guc_dbg(guc, "Failed to resume, %pe", ERR_PTR(err));
725 		return err;
726 	}
727 
728 	intel_gsc_uc_resume(&uc->gsc);
729 
730 	return 0;
731 }
732 
733 int intel_uc_resume(struct intel_uc *uc)
734 {
735 	/*
736 	 * When coming out of S3/S4 we sanitize and re-init the HW, so
737 	 * communication is already re-enabled at this point.
738 	 */
739 	return __uc_resume(uc, false);
740 }
741 
742 int intel_uc_runtime_resume(struct intel_uc *uc)
743 {
744 	/*
745 	 * During runtime resume we don't sanitize, so we need to re-init
746 	 * communication as well.
747 	 */
748 	return __uc_resume(uc, true);
749 }
750 
751 static const struct intel_uc_ops uc_ops_off = {
752 	.init_hw = __uc_check_hw,
753 	.fini = __uc_fini, /* to clean-up the init_early initialization */
754 };
755 
756 static const struct intel_uc_ops uc_ops_on = {
757 	.sanitize = __uc_sanitize,
758 
759 	.init_fw = __uc_fetch_firmwares,
760 	.fini_fw = __uc_cleanup_firmwares,
761 
762 	.init = __uc_init,
763 	.fini = __uc_fini,
764 
765 	.init_hw = __uc_init_hw,
766 	.fini_hw = __uc_fini_hw,
767 };
768