1/*
2 * Copyright 2015 Advanced Micro Devices, Inc.
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 shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: monk liu <monk.liu@amd.com>
23 */
24
25#include <drm/drm_auth.h>
26#include <drm/drm_drv.h>
27#include "amdgpu.h"
28#include "amdgpu_sched.h"
29#include "amdgpu_ras.h"
30#include <linux/nospec.h>
31
32#define to_amdgpu_ctx_entity(e) \
33 container_of((e), struct amdgpu_ctx_entity, entity)
34
35const unsigned int amdgpu_ctx_num_entities[AMDGPU_HW_IP_NUM] = {
36 [AMDGPU_HW_IP_GFX] = 1,
37 [AMDGPU_HW_IP_COMPUTE] = 4,
38 [AMDGPU_HW_IP_DMA] = 2,
39 [AMDGPU_HW_IP_UVD] = 1,
40 [AMDGPU_HW_IP_VCE] = 1,
41 [AMDGPU_HW_IP_UVD_ENC] = 1,
42 [AMDGPU_HW_IP_VCN_DEC] = 1,
43 [AMDGPU_HW_IP_VCN_ENC] = 1,
44 [AMDGPU_HW_IP_VCN_JPEG] = 1,
45 [AMDGPU_HW_IP_VPE] = 1,
46};
47
48bool amdgpu_ctx_priority_is_valid(int32_t ctx_prio)
49{
50 switch (ctx_prio) {
51 case AMDGPU_CTX_PRIORITY_VERY_LOW:
52 case AMDGPU_CTX_PRIORITY_LOW:
53 case AMDGPU_CTX_PRIORITY_NORMAL:
54 case AMDGPU_CTX_PRIORITY_HIGH:
55 case AMDGPU_CTX_PRIORITY_VERY_HIGH:
56 return true;
57 default:
58 case AMDGPU_CTX_PRIORITY_UNSET:
59 /* UNSET priority is not valid and we don't carry that
60 * around, but set it to NORMAL in the only place this
61 * function is called, amdgpu_ctx_ioctl().
62 */
63 return false;
64 }
65}
66
67static enum drm_sched_priority
68amdgpu_ctx_to_drm_sched_prio(int32_t ctx_prio)
69{
70 switch (ctx_prio) {
71 case AMDGPU_CTX_PRIORITY_UNSET:
72 pr_warn_once("AMD-->DRM context priority value UNSET-->NORMAL");
73 return DRM_SCHED_PRIORITY_NORMAL;
74
75 case AMDGPU_CTX_PRIORITY_VERY_LOW:
76 return DRM_SCHED_PRIORITY_LOW;
77
78 case AMDGPU_CTX_PRIORITY_LOW:
79 return DRM_SCHED_PRIORITY_LOW;
80
81 case AMDGPU_CTX_PRIORITY_NORMAL:
82 return DRM_SCHED_PRIORITY_NORMAL;
83
84 case AMDGPU_CTX_PRIORITY_HIGH:
85 return DRM_SCHED_PRIORITY_HIGH;
86
87 case AMDGPU_CTX_PRIORITY_VERY_HIGH:
88 return DRM_SCHED_PRIORITY_HIGH;
89
90 /* This should not happen as we sanitized userspace provided priority
91 * already, WARN if this happens.
92 */
93 default:
94 WARN(1, "Invalid context priority %d\n", ctx_prio);
95 return DRM_SCHED_PRIORITY_NORMAL;
96 }
97
98}
99
100static int amdgpu_ctx_priority_permit(struct drm_file *filp,
101 int32_t priority)
102{
103 /* NORMAL and below are accessible by everyone */
104 if (priority <= AMDGPU_CTX_PRIORITY_NORMAL)
105 return 0;
106
107 if (capable(CAP_SYS_NICE))
108 return 0;
109
110 if (drm_is_current_master(fpriv: filp))
111 return 0;
112
113 return -EACCES;
114}
115
116static enum amdgpu_gfx_pipe_priority amdgpu_ctx_prio_to_gfx_pipe_prio(int32_t prio)
117{
118 switch (prio) {
119 case AMDGPU_CTX_PRIORITY_HIGH:
120 case AMDGPU_CTX_PRIORITY_VERY_HIGH:
121 return AMDGPU_GFX_PIPE_PRIO_HIGH;
122 default:
123 return AMDGPU_GFX_PIPE_PRIO_NORMAL;
124 }
125}
126
127static enum amdgpu_ring_priority_level amdgpu_ctx_sched_prio_to_ring_prio(int32_t prio)
128{
129 switch (prio) {
130 case AMDGPU_CTX_PRIORITY_HIGH:
131 return AMDGPU_RING_PRIO_1;
132 case AMDGPU_CTX_PRIORITY_VERY_HIGH:
133 return AMDGPU_RING_PRIO_2;
134 default:
135 return AMDGPU_RING_PRIO_0;
136 }
137}
138
139static unsigned int amdgpu_ctx_get_hw_prio(struct amdgpu_ctx *ctx, u32 hw_ip)
140{
141 struct amdgpu_device *adev = ctx->mgr->adev;
142 unsigned int hw_prio;
143 int32_t ctx_prio;
144
145 ctx_prio = (ctx->override_priority == AMDGPU_CTX_PRIORITY_UNSET) ?
146 ctx->init_priority : ctx->override_priority;
147
148 switch (hw_ip) {
149 case AMDGPU_HW_IP_GFX:
150 case AMDGPU_HW_IP_COMPUTE:
151 hw_prio = amdgpu_ctx_prio_to_gfx_pipe_prio(prio: ctx_prio);
152 break;
153 case AMDGPU_HW_IP_VCE:
154 case AMDGPU_HW_IP_VCN_ENC:
155 hw_prio = amdgpu_ctx_sched_prio_to_ring_prio(prio: ctx_prio);
156 break;
157 default:
158 hw_prio = AMDGPU_RING_PRIO_DEFAULT;
159 break;
160 }
161
162 hw_ip = array_index_nospec(hw_ip, AMDGPU_HW_IP_NUM);
163 if (adev->gpu_sched[hw_ip][hw_prio].num_scheds == 0)
164 hw_prio = AMDGPU_RING_PRIO_DEFAULT;
165
166 return hw_prio;
167}
168
169/* Calculate the time spend on the hw */
170static ktime_t amdgpu_ctx_fence_time(struct dma_fence *fence)
171{
172 struct drm_sched_fence *s_fence;
173
174 if (!fence)
175 return ns_to_ktime(ns: 0);
176
177 /* When the fence is not even scheduled it can't have spend time */
178 s_fence = to_drm_sched_fence(f: fence);
179 if (!test_bit(DMA_FENCE_FLAG_TIMESTAMP_BIT, &s_fence->scheduled.flags))
180 return ns_to_ktime(ns: 0);
181
182 /* When it is still running account how much already spend */
183 if (!test_bit(DMA_FENCE_FLAG_TIMESTAMP_BIT, &s_fence->finished.flags))
184 return ktime_sub(ktime_get(), s_fence->scheduled.timestamp);
185
186 return ktime_sub(s_fence->finished.timestamp,
187 s_fence->scheduled.timestamp);
188}
189
190static ktime_t amdgpu_ctx_entity_time(struct amdgpu_ctx *ctx,
191 struct amdgpu_ctx_entity *centity)
192{
193 ktime_t res = ns_to_ktime(ns: 0);
194 uint32_t i;
195
196 spin_lock(lock: &ctx->ring_lock);
197 for (i = 0; i < amdgpu_sched_jobs; i++) {
198 res = ktime_add(res, amdgpu_ctx_fence_time(centity->fences[i]));
199 }
200 spin_unlock(lock: &ctx->ring_lock);
201 return res;
202}
203
204static int amdgpu_ctx_init_entity(struct amdgpu_ctx *ctx, u32 hw_ip,
205 const u32 ring)
206{
207 struct drm_gpu_scheduler **scheds = NULL, *sched = NULL;
208 struct amdgpu_device *adev = ctx->mgr->adev;
209 struct amdgpu_ctx_entity *entity;
210 enum drm_sched_priority drm_prio;
211 unsigned int hw_prio, num_scheds;
212 int32_t ctx_prio;
213 int r;
214
215 entity = kzalloc(struct_size(entity, fences, amdgpu_sched_jobs),
216 GFP_KERNEL);
217 if (!entity)
218 return -ENOMEM;
219
220 ctx_prio = (ctx->override_priority == AMDGPU_CTX_PRIORITY_UNSET) ?
221 ctx->init_priority : ctx->override_priority;
222 entity->hw_ip = hw_ip;
223 entity->sequence = 1;
224 hw_prio = amdgpu_ctx_get_hw_prio(ctx, hw_ip);
225 drm_prio = amdgpu_ctx_to_drm_sched_prio(ctx_prio);
226
227 hw_ip = array_index_nospec(hw_ip, AMDGPU_HW_IP_NUM);
228
229 if (!(adev)->xcp_mgr) {
230 scheds = adev->gpu_sched[hw_ip][hw_prio].sched;
231 num_scheds = adev->gpu_sched[hw_ip][hw_prio].num_scheds;
232 } else {
233 struct amdgpu_fpriv *fpriv;
234
235 fpriv = container_of(ctx->ctx_mgr, struct amdgpu_fpriv, ctx_mgr);
236 r = amdgpu_xcp_select_scheds(adev, hw_ip, hw_prio, fpriv,
237 num_scheds: &num_scheds, scheds: &scheds);
238 if (r)
239 goto error_free_entity;
240 }
241
242 /* disable load balance if the hw engine retains context among dependent jobs */
243 if (hw_ip == AMDGPU_HW_IP_VCN_ENC ||
244 hw_ip == AMDGPU_HW_IP_VCN_DEC ||
245 hw_ip == AMDGPU_HW_IP_UVD_ENC ||
246 hw_ip == AMDGPU_HW_IP_UVD) {
247 sched = drm_sched_pick_best(sched_list: scheds, num_sched_list: num_scheds);
248 scheds = &sched;
249 num_scheds = 1;
250 }
251
252 r = drm_sched_entity_init(entity: &entity->entity, priority: drm_prio, sched_list: scheds, num_sched_list: num_scheds,
253 guilty: &ctx->guilty);
254 if (r)
255 goto error_free_entity;
256
257 /* It's not an error if we fail to install the new entity */
258 if (cmpxchg(&ctx->entities[hw_ip][ring], NULL, entity))
259 goto cleanup_entity;
260
261 return 0;
262
263cleanup_entity:
264 drm_sched_entity_fini(entity: &entity->entity);
265
266error_free_entity:
267 kfree(objp: entity);
268
269 return r;
270}
271
272static ktime_t amdgpu_ctx_fini_entity(struct amdgpu_device *adev,
273 struct amdgpu_ctx_entity *entity)
274{
275 ktime_t res = ns_to_ktime(ns: 0);
276 int i;
277
278 if (!entity)
279 return res;
280
281 for (i = 0; i < amdgpu_sched_jobs; ++i) {
282 res = ktime_add(res, amdgpu_ctx_fence_time(entity->fences[i]));
283 dma_fence_put(fence: entity->fences[i]);
284 }
285
286 amdgpu_xcp_release_sched(adev, entity);
287
288 kfree(objp: entity);
289 return res;
290}
291
292static int amdgpu_ctx_get_stable_pstate(struct amdgpu_ctx *ctx,
293 u32 *stable_pstate)
294{
295 struct amdgpu_device *adev = ctx->mgr->adev;
296 enum amd_dpm_forced_level current_level;
297
298 current_level = amdgpu_dpm_get_performance_level(adev);
299
300 switch (current_level) {
301 case AMD_DPM_FORCED_LEVEL_PROFILE_STANDARD:
302 *stable_pstate = AMDGPU_CTX_STABLE_PSTATE_STANDARD;
303 break;
304 case AMD_DPM_FORCED_LEVEL_PROFILE_MIN_SCLK:
305 *stable_pstate = AMDGPU_CTX_STABLE_PSTATE_MIN_SCLK;
306 break;
307 case AMD_DPM_FORCED_LEVEL_PROFILE_MIN_MCLK:
308 *stable_pstate = AMDGPU_CTX_STABLE_PSTATE_MIN_MCLK;
309 break;
310 case AMD_DPM_FORCED_LEVEL_PROFILE_PEAK:
311 *stable_pstate = AMDGPU_CTX_STABLE_PSTATE_PEAK;
312 break;
313 default:
314 *stable_pstate = AMDGPU_CTX_STABLE_PSTATE_NONE;
315 break;
316 }
317 return 0;
318}
319
320static int amdgpu_ctx_init(struct amdgpu_ctx_mgr *mgr, int32_t priority,
321 struct drm_file *filp, struct amdgpu_ctx *ctx)
322{
323 struct amdgpu_fpriv *fpriv = filp->driver_priv;
324 u32 current_stable_pstate;
325 int r;
326
327 r = amdgpu_ctx_priority_permit(filp, priority);
328 if (r)
329 return r;
330
331 memset(ctx, 0, sizeof(*ctx));
332
333 kref_init(kref: &ctx->refcount);
334 ctx->mgr = mgr;
335 spin_lock_init(&ctx->ring_lock);
336
337 ctx->reset_counter = atomic_read(v: &mgr->adev->gpu_reset_counter);
338 ctx->reset_counter_query = ctx->reset_counter;
339 ctx->generation = amdgpu_vm_generation(adev: mgr->adev, vm: &fpriv->vm);
340 ctx->init_priority = priority;
341 ctx->override_priority = AMDGPU_CTX_PRIORITY_UNSET;
342
343 r = amdgpu_ctx_get_stable_pstate(ctx, stable_pstate: &current_stable_pstate);
344 if (r)
345 return r;
346
347 if (mgr->adev->pm.stable_pstate_ctx)
348 ctx->stable_pstate = mgr->adev->pm.stable_pstate_ctx->stable_pstate;
349 else
350 ctx->stable_pstate = current_stable_pstate;
351
352 ctx->ctx_mgr = &(fpriv->ctx_mgr);
353 return 0;
354}
355
356static int amdgpu_ctx_set_stable_pstate(struct amdgpu_ctx *ctx,
357 u32 stable_pstate)
358{
359 struct amdgpu_device *adev = ctx->mgr->adev;
360 enum amd_dpm_forced_level level;
361 u32 current_stable_pstate;
362 int r;
363
364 mutex_lock(&adev->pm.stable_pstate_ctx_lock);
365 if (adev->pm.stable_pstate_ctx && adev->pm.stable_pstate_ctx != ctx) {
366 r = -EBUSY;
367 goto done;
368 }
369
370 r = amdgpu_ctx_get_stable_pstate(ctx, stable_pstate: &current_stable_pstate);
371 if (r || (stable_pstate == current_stable_pstate))
372 goto done;
373
374 switch (stable_pstate) {
375 case AMDGPU_CTX_STABLE_PSTATE_NONE:
376 level = AMD_DPM_FORCED_LEVEL_AUTO;
377 break;
378 case AMDGPU_CTX_STABLE_PSTATE_STANDARD:
379 level = AMD_DPM_FORCED_LEVEL_PROFILE_STANDARD;
380 break;
381 case AMDGPU_CTX_STABLE_PSTATE_MIN_SCLK:
382 level = AMD_DPM_FORCED_LEVEL_PROFILE_MIN_SCLK;
383 break;
384 case AMDGPU_CTX_STABLE_PSTATE_MIN_MCLK:
385 level = AMD_DPM_FORCED_LEVEL_PROFILE_MIN_MCLK;
386 break;
387 case AMDGPU_CTX_STABLE_PSTATE_PEAK:
388 level = AMD_DPM_FORCED_LEVEL_PROFILE_PEAK;
389 break;
390 default:
391 r = -EINVAL;
392 goto done;
393 }
394
395 r = amdgpu_dpm_force_performance_level(adev, level);
396
397 if (level == AMD_DPM_FORCED_LEVEL_AUTO)
398 adev->pm.stable_pstate_ctx = NULL;
399 else
400 adev->pm.stable_pstate_ctx = ctx;
401done:
402 mutex_unlock(lock: &adev->pm.stable_pstate_ctx_lock);
403
404 return r;
405}
406
407static void amdgpu_ctx_fini(struct kref *ref)
408{
409 struct amdgpu_ctx *ctx = container_of(ref, struct amdgpu_ctx, refcount);
410 struct amdgpu_ctx_mgr *mgr = ctx->mgr;
411 struct amdgpu_device *adev = mgr->adev;
412 unsigned i, j, idx;
413
414 if (!adev)
415 return;
416
417 for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
418 for (j = 0; j < AMDGPU_MAX_ENTITY_NUM; ++j) {
419 ktime_t spend;
420
421 spend = amdgpu_ctx_fini_entity(adev, entity: ctx->entities[i][j]);
422 atomic64_add(i: ktime_to_ns(kt: spend), v: &mgr->time_spend[i]);
423 }
424 }
425
426 if (drm_dev_enter(dev: adev_to_drm(adev), idx: &idx)) {
427 amdgpu_ctx_set_stable_pstate(ctx, stable_pstate: ctx->stable_pstate);
428 drm_dev_exit(idx);
429 }
430
431 kfree(objp: ctx);
432}
433
434int amdgpu_ctx_get_entity(struct amdgpu_ctx *ctx, u32 hw_ip, u32 instance,
435 u32 ring, struct drm_sched_entity **entity)
436{
437 int r;
438 struct drm_sched_entity *ctx_entity;
439
440 if (hw_ip >= AMDGPU_HW_IP_NUM) {
441 DRM_ERROR("unknown HW IP type: %d\n", hw_ip);
442 return -EINVAL;
443 }
444
445 /* Right now all IPs have only one instance - multiple rings. */
446 if (instance != 0) {
447 DRM_DEBUG("invalid ip instance: %d\n", instance);
448 return -EINVAL;
449 }
450
451 if (ring >= amdgpu_ctx_num_entities[hw_ip]) {
452 DRM_DEBUG("invalid ring: %d %d\n", hw_ip, ring);
453 return -EINVAL;
454 }
455
456 if (ctx->entities[hw_ip][ring] == NULL) {
457 r = amdgpu_ctx_init_entity(ctx, hw_ip, ring);
458 if (r)
459 return r;
460 }
461
462 ctx_entity = &ctx->entities[hw_ip][ring]->entity;
463 r = drm_sched_entity_error(entity: ctx_entity);
464 if (r) {
465 DRM_DEBUG("error entity %p\n", ctx_entity);
466 return r;
467 }
468
469 *entity = ctx_entity;
470 return 0;
471}
472
473static int amdgpu_ctx_alloc(struct amdgpu_device *adev,
474 struct amdgpu_fpriv *fpriv,
475 struct drm_file *filp,
476 int32_t priority,
477 uint32_t *id)
478{
479 struct amdgpu_ctx_mgr *mgr = &fpriv->ctx_mgr;
480 struct amdgpu_ctx *ctx;
481 int r;
482
483 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
484 if (!ctx)
485 return -ENOMEM;
486
487 mutex_lock(&mgr->lock);
488 r = idr_alloc(&mgr->ctx_handles, ptr: ctx, start: 1, AMDGPU_VM_MAX_NUM_CTX, GFP_KERNEL);
489 if (r < 0) {
490 mutex_unlock(lock: &mgr->lock);
491 kfree(objp: ctx);
492 return r;
493 }
494
495 *id = (uint32_t)r;
496 r = amdgpu_ctx_init(mgr, priority, filp, ctx);
497 if (r) {
498 idr_remove(&mgr->ctx_handles, id: *id);
499 *id = 0;
500 kfree(objp: ctx);
501 }
502 mutex_unlock(lock: &mgr->lock);
503 return r;
504}
505
506static void amdgpu_ctx_do_release(struct kref *ref)
507{
508 struct amdgpu_ctx *ctx;
509 u32 i, j;
510
511 ctx = container_of(ref, struct amdgpu_ctx, refcount);
512 for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
513 for (j = 0; j < amdgpu_ctx_num_entities[i]; ++j) {
514 if (!ctx->entities[i][j])
515 continue;
516
517 drm_sched_entity_destroy(entity: &ctx->entities[i][j]->entity);
518 }
519 }
520
521 amdgpu_ctx_fini(ref);
522}
523
524static int amdgpu_ctx_free(struct amdgpu_fpriv *fpriv, uint32_t id)
525{
526 struct amdgpu_ctx_mgr *mgr = &fpriv->ctx_mgr;
527 struct amdgpu_ctx *ctx;
528
529 mutex_lock(&mgr->lock);
530 ctx = idr_remove(&mgr->ctx_handles, id);
531 if (ctx)
532 kref_put(kref: &ctx->refcount, release: amdgpu_ctx_do_release);
533 mutex_unlock(lock: &mgr->lock);
534 return ctx ? 0 : -EINVAL;
535}
536
537static int amdgpu_ctx_query(struct amdgpu_device *adev,
538 struct amdgpu_fpriv *fpriv, uint32_t id,
539 union drm_amdgpu_ctx_out *out)
540{
541 struct amdgpu_ctx *ctx;
542 struct amdgpu_ctx_mgr *mgr;
543 unsigned reset_counter;
544
545 if (!fpriv)
546 return -EINVAL;
547
548 mgr = &fpriv->ctx_mgr;
549 mutex_lock(&mgr->lock);
550 ctx = idr_find(&mgr->ctx_handles, id);
551 if (!ctx) {
552 mutex_unlock(lock: &mgr->lock);
553 return -EINVAL;
554 }
555
556 /* TODO: these two are always zero */
557 out->state.flags = 0x0;
558 out->state.hangs = 0x0;
559
560 /* determine if a GPU reset has occured since the last call */
561 reset_counter = atomic_read(v: &adev->gpu_reset_counter);
562 /* TODO: this should ideally return NO, GUILTY, or INNOCENT. */
563 if (ctx->reset_counter_query == reset_counter)
564 out->state.reset_status = AMDGPU_CTX_NO_RESET;
565 else
566 out->state.reset_status = AMDGPU_CTX_UNKNOWN_RESET;
567 ctx->reset_counter_query = reset_counter;
568
569 mutex_unlock(lock: &mgr->lock);
570 return 0;
571}
572
573#define AMDGPU_RAS_COUNTE_DELAY_MS 3000
574
575static int amdgpu_ctx_query2(struct amdgpu_device *adev,
576 struct amdgpu_fpriv *fpriv, uint32_t id,
577 union drm_amdgpu_ctx_out *out)
578{
579 struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
580 struct amdgpu_ctx *ctx;
581 struct amdgpu_ctx_mgr *mgr;
582
583 if (!fpriv)
584 return -EINVAL;
585
586 mgr = &fpriv->ctx_mgr;
587 mutex_lock(&mgr->lock);
588 ctx = idr_find(&mgr->ctx_handles, id);
589 if (!ctx) {
590 mutex_unlock(lock: &mgr->lock);
591 return -EINVAL;
592 }
593
594 out->state.flags = 0x0;
595 out->state.hangs = 0x0;
596
597 if (ctx->reset_counter != atomic_read(v: &adev->gpu_reset_counter))
598 out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_RESET;
599
600 if (ctx->generation != amdgpu_vm_generation(adev, vm: &fpriv->vm))
601 out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_VRAMLOST;
602
603 if (atomic_read(v: &ctx->guilty))
604 out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_GUILTY;
605
606 if (amdgpu_in_reset(adev))
607 out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_RESET_IN_PROGRESS;
608
609 if (adev->ras_enabled && con) {
610 /* Return the cached values in O(1),
611 * and schedule delayed work to cache
612 * new vaues.
613 */
614 int ce_count, ue_count;
615
616 ce_count = atomic_read(v: &con->ras_ce_count);
617 ue_count = atomic_read(v: &con->ras_ue_count);
618
619 if (ce_count != ctx->ras_counter_ce) {
620 ctx->ras_counter_ce = ce_count;
621 out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_RAS_CE;
622 }
623
624 if (ue_count != ctx->ras_counter_ue) {
625 ctx->ras_counter_ue = ue_count;
626 out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_RAS_UE;
627 }
628
629 schedule_delayed_work(dwork: &con->ras_counte_delay_work,
630 delay: msecs_to_jiffies(AMDGPU_RAS_COUNTE_DELAY_MS));
631 }
632
633 mutex_unlock(lock: &mgr->lock);
634 return 0;
635}
636
637static int amdgpu_ctx_stable_pstate(struct amdgpu_device *adev,
638 struct amdgpu_fpriv *fpriv, uint32_t id,
639 bool set, u32 *stable_pstate)
640{
641 struct amdgpu_ctx *ctx;
642 struct amdgpu_ctx_mgr *mgr;
643 int r;
644
645 if (!fpriv)
646 return -EINVAL;
647
648 mgr = &fpriv->ctx_mgr;
649 mutex_lock(&mgr->lock);
650 ctx = idr_find(&mgr->ctx_handles, id);
651 if (!ctx) {
652 mutex_unlock(lock: &mgr->lock);
653 return -EINVAL;
654 }
655
656 if (set)
657 r = amdgpu_ctx_set_stable_pstate(ctx, stable_pstate: *stable_pstate);
658 else
659 r = amdgpu_ctx_get_stable_pstate(ctx, stable_pstate);
660
661 mutex_unlock(lock: &mgr->lock);
662 return r;
663}
664
665int amdgpu_ctx_ioctl(struct drm_device *dev, void *data,
666 struct drm_file *filp)
667{
668 int r;
669 uint32_t id, stable_pstate;
670 int32_t priority;
671
672 union drm_amdgpu_ctx *args = data;
673 struct amdgpu_device *adev = drm_to_adev(ddev: dev);
674 struct amdgpu_fpriv *fpriv = filp->driver_priv;
675
676 id = args->in.ctx_id;
677 priority = args->in.priority;
678
679 /* For backwards compatibility, we need to accept ioctls with garbage
680 * in the priority field. Garbage values in the priority field, result
681 * in the priority being set to NORMAL.
682 */
683 if (!amdgpu_ctx_priority_is_valid(ctx_prio: priority))
684 priority = AMDGPU_CTX_PRIORITY_NORMAL;
685
686 switch (args->in.op) {
687 case AMDGPU_CTX_OP_ALLOC_CTX:
688 if (args->in.flags)
689 return -EINVAL;
690 r = amdgpu_ctx_alloc(adev, fpriv, filp, priority, id: &id);
691 args->out.alloc.ctx_id = id;
692 break;
693 case AMDGPU_CTX_OP_FREE_CTX:
694 if (args->in.flags)
695 return -EINVAL;
696 r = amdgpu_ctx_free(fpriv, id);
697 break;
698 case AMDGPU_CTX_OP_QUERY_STATE:
699 if (args->in.flags)
700 return -EINVAL;
701 r = amdgpu_ctx_query(adev, fpriv, id, out: &args->out);
702 break;
703 case AMDGPU_CTX_OP_QUERY_STATE2:
704 if (args->in.flags)
705 return -EINVAL;
706 r = amdgpu_ctx_query2(adev, fpriv, id, out: &args->out);
707 break;
708 case AMDGPU_CTX_OP_GET_STABLE_PSTATE:
709 if (args->in.flags)
710 return -EINVAL;
711 r = amdgpu_ctx_stable_pstate(adev, fpriv, id, set: false, stable_pstate: &stable_pstate);
712 if (!r)
713 args->out.pstate.flags = stable_pstate;
714 break;
715 case AMDGPU_CTX_OP_SET_STABLE_PSTATE:
716 if (args->in.flags & ~AMDGPU_CTX_STABLE_PSTATE_FLAGS_MASK)
717 return -EINVAL;
718 stable_pstate = args->in.flags & AMDGPU_CTX_STABLE_PSTATE_FLAGS_MASK;
719 if (stable_pstate > AMDGPU_CTX_STABLE_PSTATE_PEAK)
720 return -EINVAL;
721 r = amdgpu_ctx_stable_pstate(adev, fpriv, id, set: true, stable_pstate: &stable_pstate);
722 break;
723 default:
724 return -EINVAL;
725 }
726
727 return r;
728}
729
730struct amdgpu_ctx *amdgpu_ctx_get(struct amdgpu_fpriv *fpriv, uint32_t id)
731{
732 struct amdgpu_ctx *ctx;
733 struct amdgpu_ctx_mgr *mgr;
734
735 if (!fpriv)
736 return NULL;
737
738 mgr = &fpriv->ctx_mgr;
739
740 mutex_lock(&mgr->lock);
741 ctx = idr_find(&mgr->ctx_handles, id);
742 if (ctx)
743 kref_get(kref: &ctx->refcount);
744 mutex_unlock(lock: &mgr->lock);
745 return ctx;
746}
747
748int amdgpu_ctx_put(struct amdgpu_ctx *ctx)
749{
750 if (ctx == NULL)
751 return -EINVAL;
752
753 kref_put(kref: &ctx->refcount, release: amdgpu_ctx_do_release);
754 return 0;
755}
756
757uint64_t amdgpu_ctx_add_fence(struct amdgpu_ctx *ctx,
758 struct drm_sched_entity *entity,
759 struct dma_fence *fence)
760{
761 struct amdgpu_ctx_entity *centity = to_amdgpu_ctx_entity(entity);
762 uint64_t seq = centity->sequence;
763 struct dma_fence *other = NULL;
764 unsigned idx = 0;
765
766 idx = seq & (amdgpu_sched_jobs - 1);
767 other = centity->fences[idx];
768 WARN_ON(other && !dma_fence_is_signaled(other));
769
770 dma_fence_get(fence);
771
772 spin_lock(lock: &ctx->ring_lock);
773 centity->fences[idx] = fence;
774 centity->sequence++;
775 spin_unlock(lock: &ctx->ring_lock);
776
777 atomic64_add(i: ktime_to_ns(kt: amdgpu_ctx_fence_time(fence: other)),
778 v: &ctx->mgr->time_spend[centity->hw_ip]);
779
780 dma_fence_put(fence: other);
781 return seq;
782}
783
784struct dma_fence *amdgpu_ctx_get_fence(struct amdgpu_ctx *ctx,
785 struct drm_sched_entity *entity,
786 uint64_t seq)
787{
788 struct amdgpu_ctx_entity *centity = to_amdgpu_ctx_entity(entity);
789 struct dma_fence *fence;
790
791 spin_lock(lock: &ctx->ring_lock);
792
793 if (seq == ~0ull)
794 seq = centity->sequence - 1;
795
796 if (seq >= centity->sequence) {
797 spin_unlock(lock: &ctx->ring_lock);
798 return ERR_PTR(error: -EINVAL);
799 }
800
801
802 if (seq + amdgpu_sched_jobs < centity->sequence) {
803 spin_unlock(lock: &ctx->ring_lock);
804 return NULL;
805 }
806
807 fence = dma_fence_get(fence: centity->fences[seq & (amdgpu_sched_jobs - 1)]);
808 spin_unlock(lock: &ctx->ring_lock);
809
810 return fence;
811}
812
813static void amdgpu_ctx_set_entity_priority(struct amdgpu_ctx *ctx,
814 struct amdgpu_ctx_entity *aentity,
815 int hw_ip,
816 int32_t priority)
817{
818 struct amdgpu_device *adev = ctx->mgr->adev;
819 unsigned int hw_prio;
820 struct drm_gpu_scheduler **scheds = NULL;
821 unsigned num_scheds;
822
823 /* set sw priority */
824 drm_sched_entity_set_priority(entity: &aentity->entity,
825 priority: amdgpu_ctx_to_drm_sched_prio(ctx_prio: priority));
826
827 /* set hw priority */
828 if (hw_ip == AMDGPU_HW_IP_COMPUTE || hw_ip == AMDGPU_HW_IP_GFX) {
829 hw_prio = amdgpu_ctx_get_hw_prio(ctx, hw_ip);
830 hw_prio = array_index_nospec(hw_prio, AMDGPU_RING_PRIO_MAX);
831 scheds = adev->gpu_sched[hw_ip][hw_prio].sched;
832 num_scheds = adev->gpu_sched[hw_ip][hw_prio].num_scheds;
833 drm_sched_entity_modify_sched(entity: &aentity->entity, sched_list: scheds,
834 num_sched_list: num_scheds);
835 }
836}
837
838void amdgpu_ctx_priority_override(struct amdgpu_ctx *ctx,
839 int32_t priority)
840{
841 int32_t ctx_prio;
842 unsigned i, j;
843
844 ctx->override_priority = priority;
845
846 ctx_prio = (ctx->override_priority == AMDGPU_CTX_PRIORITY_UNSET) ?
847 ctx->init_priority : ctx->override_priority;
848 for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
849 for (j = 0; j < amdgpu_ctx_num_entities[i]; ++j) {
850 if (!ctx->entities[i][j])
851 continue;
852
853 amdgpu_ctx_set_entity_priority(ctx, aentity: ctx->entities[i][j],
854 hw_ip: i, priority: ctx_prio);
855 }
856 }
857}
858
859int amdgpu_ctx_wait_prev_fence(struct amdgpu_ctx *ctx,
860 struct drm_sched_entity *entity)
861{
862 struct amdgpu_ctx_entity *centity = to_amdgpu_ctx_entity(entity);
863 struct dma_fence *other;
864 unsigned idx;
865 long r;
866
867 spin_lock(lock: &ctx->ring_lock);
868 idx = centity->sequence & (amdgpu_sched_jobs - 1);
869 other = dma_fence_get(fence: centity->fences[idx]);
870 spin_unlock(lock: &ctx->ring_lock);
871
872 if (!other)
873 return 0;
874
875 r = dma_fence_wait(fence: other, intr: true);
876 if (r < 0 && r != -ERESTARTSYS)
877 DRM_ERROR("Error (%ld) waiting for fence!\n", r);
878
879 dma_fence_put(fence: other);
880 return r;
881}
882
883void amdgpu_ctx_mgr_init(struct amdgpu_ctx_mgr *mgr,
884 struct amdgpu_device *adev)
885{
886 unsigned int i;
887
888 mgr->adev = adev;
889 mutex_init(&mgr->lock);
890 idr_init_base(idr: &mgr->ctx_handles, base: 1);
891
892 for (i = 0; i < AMDGPU_HW_IP_NUM; ++i)
893 atomic64_set(v: &mgr->time_spend[i], i: 0);
894}
895
896long amdgpu_ctx_mgr_entity_flush(struct amdgpu_ctx_mgr *mgr, long timeout)
897{
898 struct amdgpu_ctx *ctx;
899 struct idr *idp;
900 uint32_t id, i, j;
901
902 idp = &mgr->ctx_handles;
903
904 mutex_lock(&mgr->lock);
905 idr_for_each_entry(idp, ctx, id) {
906 for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
907 for (j = 0; j < amdgpu_ctx_num_entities[i]; ++j) {
908 struct drm_sched_entity *entity;
909
910 if (!ctx->entities[i][j])
911 continue;
912
913 entity = &ctx->entities[i][j]->entity;
914 timeout = drm_sched_entity_flush(entity, timeout);
915 }
916 }
917 }
918 mutex_unlock(lock: &mgr->lock);
919 return timeout;
920}
921
922static void amdgpu_ctx_mgr_entity_fini(struct amdgpu_ctx_mgr *mgr)
923{
924 struct amdgpu_ctx *ctx;
925 struct idr *idp;
926 uint32_t id, i, j;
927
928 idp = &mgr->ctx_handles;
929
930 idr_for_each_entry(idp, ctx, id) {
931 if (kref_read(kref: &ctx->refcount) != 1) {
932 DRM_ERROR("ctx %p is still alive\n", ctx);
933 continue;
934 }
935
936 for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
937 for (j = 0; j < amdgpu_ctx_num_entities[i]; ++j) {
938 struct drm_sched_entity *entity;
939
940 if (!ctx->entities[i][j])
941 continue;
942
943 entity = &ctx->entities[i][j]->entity;
944 drm_sched_entity_fini(entity);
945 }
946 }
947 kref_put(kref: &ctx->refcount, release: amdgpu_ctx_fini);
948 }
949}
950
951void amdgpu_ctx_mgr_fini(struct amdgpu_ctx_mgr *mgr)
952{
953 amdgpu_ctx_mgr_entity_fini(mgr);
954 idr_destroy(&mgr->ctx_handles);
955 mutex_destroy(lock: &mgr->lock);
956}
957
958void amdgpu_ctx_mgr_usage(struct amdgpu_ctx_mgr *mgr,
959 ktime_t usage[AMDGPU_HW_IP_NUM])
960{
961 struct amdgpu_ctx *ctx;
962 unsigned int hw_ip, i;
963 uint32_t id;
964
965 /*
966 * This is a little bit racy because it can be that a ctx or a fence are
967 * destroyed just in the moment we try to account them. But that is ok
968 * since exactly that case is explicitely allowed by the interface.
969 */
970 mutex_lock(&mgr->lock);
971 for (hw_ip = 0; hw_ip < AMDGPU_HW_IP_NUM; ++hw_ip) {
972 uint64_t ns = atomic64_read(v: &mgr->time_spend[hw_ip]);
973
974 usage[hw_ip] = ns_to_ktime(ns);
975 }
976
977 idr_for_each_entry(&mgr->ctx_handles, ctx, id) {
978 for (hw_ip = 0; hw_ip < AMDGPU_HW_IP_NUM; ++hw_ip) {
979 for (i = 0; i < amdgpu_ctx_num_entities[hw_ip]; ++i) {
980 struct amdgpu_ctx_entity *centity;
981 ktime_t spend;
982
983 centity = ctx->entities[hw_ip][i];
984 if (!centity)
985 continue;
986 spend = amdgpu_ctx_entity_time(ctx, centity);
987 usage[hw_ip] = ktime_add(usage[hw_ip], spend);
988 }
989 }
990 }
991 mutex_unlock(lock: &mgr->lock);
992}
993

source code of linux/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c