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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 "amdgpu.h"
27#include "amdgpu_sched.h"
28#include "amdgpu_ras.h"
29#include <linux/nospec.h>
30
31#define to_amdgpu_ctx_entity(e) \
32 container_of((e), struct amdgpu_ctx_entity, entity)
33
34const unsigned int amdgpu_ctx_num_entities[AMDGPU_HW_IP_NUM] = {
35 [AMDGPU_HW_IP_GFX] = 1,
36 [AMDGPU_HW_IP_COMPUTE] = 4,
37 [AMDGPU_HW_IP_DMA] = 2,
38 [AMDGPU_HW_IP_UVD] = 1,
39 [AMDGPU_HW_IP_VCE] = 1,
40 [AMDGPU_HW_IP_UVD_ENC] = 1,
41 [AMDGPU_HW_IP_VCN_DEC] = 1,
42 [AMDGPU_HW_IP_VCN_ENC] = 1,
43 [AMDGPU_HW_IP_VCN_JPEG] = 1,
44};
45
46static int amdgpu_ctx_priority_permit(struct drm_file *filp,
47 enum drm_sched_priority priority)
48{
49 if (priority < 0 || priority >= DRM_SCHED_PRIORITY_MAX)
50 return -EINVAL;
51
52 /* NORMAL and below are accessible by everyone */
53 if (priority <= DRM_SCHED_PRIORITY_NORMAL)
54 return 0;
55
56 if (capable(CAP_SYS_NICE))
57 return 0;
58
59 if (drm_is_current_master(filp))
60 return 0;
61
62 return -EACCES;
63}
64
65static enum gfx_pipe_priority amdgpu_ctx_sched_prio_to_compute_prio(enum drm_sched_priority prio)
66{
67 switch (prio) {
68 case DRM_SCHED_PRIORITY_HIGH_HW:
69 case DRM_SCHED_PRIORITY_KERNEL:
70 return AMDGPU_GFX_PIPE_PRIO_HIGH;
71 default:
72 return AMDGPU_GFX_PIPE_PRIO_NORMAL;
73 }
74}
75
76static unsigned int amdgpu_ctx_prio_sched_to_hw(struct amdgpu_device *adev,
77 enum drm_sched_priority prio,
78 u32 hw_ip)
79{
80 unsigned int hw_prio;
81
82 hw_prio = (hw_ip == AMDGPU_HW_IP_COMPUTE) ?
83 amdgpu_ctx_sched_prio_to_compute_prio(prio) :
84 AMDGPU_RING_PRIO_DEFAULT;
85 hw_ip = array_index_nospec(hw_ip, AMDGPU_HW_IP_NUM);
86 if (adev->gpu_sched[hw_ip][hw_prio].num_scheds == 0)
87 hw_prio = AMDGPU_RING_PRIO_DEFAULT;
88
89 return hw_prio;
90}
91
92static int amdgpu_ctx_init_entity(struct amdgpu_ctx *ctx, u32 hw_ip,
93 const u32 ring)
94{
95 struct amdgpu_device *adev = ctx->adev;
96 struct amdgpu_ctx_entity *entity;
97 struct drm_gpu_scheduler **scheds = NULL, *sched = NULL;
98 unsigned num_scheds = 0;
99 unsigned int hw_prio;
100 enum drm_sched_priority priority;
101 int r;
102
103 entity = kcalloc(1, offsetof(typeof(*entity), fences[amdgpu_sched_jobs]),
104 GFP_KERNEL);
105 if (!entity)
106 return -ENOMEM;
107
108 entity->sequence = 1;
109 priority = (ctx->override_priority == DRM_SCHED_PRIORITY_UNSET) ?
110 ctx->init_priority : ctx->override_priority;
111 hw_prio = amdgpu_ctx_prio_sched_to_hw(adev, priority, hw_ip);
112
113 hw_ip = array_index_nospec(hw_ip, AMDGPU_HW_IP_NUM);
114 scheds = adev->gpu_sched[hw_ip][hw_prio].sched;
115 num_scheds = adev->gpu_sched[hw_ip][hw_prio].num_scheds;
116
117 if (hw_ip == AMDGPU_HW_IP_VCN_ENC || hw_ip == AMDGPU_HW_IP_VCN_DEC) {
118 sched = drm_sched_pick_best(scheds, num_scheds);
119 scheds = &sched;
120 num_scheds = 1;
121 }
122
123 r = drm_sched_entity_init(&entity->entity, priority, scheds, num_scheds,
124 &ctx->guilty);
125 if (r)
126 goto error_free_entity;
127
128 ctx->entities[hw_ip][ring] = entity;
129 return 0;
130
131error_free_entity:
132 kfree(entity);
133
134 return r;
135}
136
137static int amdgpu_ctx_init(struct amdgpu_device *adev,
138 enum drm_sched_priority priority,
139 struct drm_file *filp,
140 struct amdgpu_ctx *ctx)
141{
142 int r;
143
144 r = amdgpu_ctx_priority_permit(filp, priority);
145 if (r)
146 return r;
147
148 memset(ctx, 0, sizeof(*ctx));
149
150 ctx->adev = adev;
151
152 kref_init(&ctx->refcount);
153 spin_lock_init(&ctx->ring_lock);
154 mutex_init(&ctx->lock);
155
156 ctx->reset_counter = atomic_read(&adev->gpu_reset_counter);
157 ctx->reset_counter_query = ctx->reset_counter;
158 ctx->vram_lost_counter = atomic_read(&adev->vram_lost_counter);
159 ctx->init_priority = priority;
160 ctx->override_priority = DRM_SCHED_PRIORITY_UNSET;
161
162 return 0;
163}
164
165static void amdgpu_ctx_fini_entity(struct amdgpu_ctx_entity *entity)
166{
167
168 int i;
169
170 if (!entity)
171 return;
172
173 for (i = 0; i < amdgpu_sched_jobs; ++i)
174 dma_fence_put(entity->fences[i]);
175
176 kfree(entity);
177}
178
179static void amdgpu_ctx_fini(struct kref *ref)
180{
181 struct amdgpu_ctx *ctx = container_of(ref, struct amdgpu_ctx, refcount);
182 struct amdgpu_device *adev = ctx->adev;
183 unsigned i, j;
184
185 if (!adev)
186 return;
187
188 for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
189 for (j = 0; j < AMDGPU_MAX_ENTITY_NUM; ++j) {
190 amdgpu_ctx_fini_entity(ctx->entities[i][j]);
191 ctx->entities[i][j] = NULL;
192 }
193 }
194
195 mutex_destroy(&ctx->lock);
196 kfree(ctx);
197}
198
199int amdgpu_ctx_get_entity(struct amdgpu_ctx *ctx, u32 hw_ip, u32 instance,
200 u32 ring, struct drm_sched_entity **entity)
201{
202 int r;
203
204 if (hw_ip >= AMDGPU_HW_IP_NUM) {
205 DRM_ERROR("unknown HW IP type: %d\n", hw_ip);
206 return -EINVAL;
207 }
208
209 /* Right now all IPs have only one instance - multiple rings. */
210 if (instance != 0) {
211 DRM_DEBUG("invalid ip instance: %d\n", instance);
212 return -EINVAL;
213 }
214
215 if (ring >= amdgpu_ctx_num_entities[hw_ip]) {
216 DRM_DEBUG("invalid ring: %d %d\n", hw_ip, ring);
217 return -EINVAL;
218 }
219
220 if (ctx->entities[hw_ip][ring] == NULL) {
221 r = amdgpu_ctx_init_entity(ctx, hw_ip, ring);
222 if (r)
223 return r;
224 }
225
226 *entity = &ctx->entities[hw_ip][ring]->entity;
227 return 0;
228}
229
230static int amdgpu_ctx_alloc(struct amdgpu_device *adev,
231 struct amdgpu_fpriv *fpriv,
232 struct drm_file *filp,
233 enum drm_sched_priority priority,
234 uint32_t *id)
235{
236 struct amdgpu_ctx_mgr *mgr = &fpriv->ctx_mgr;
237 struct amdgpu_ctx *ctx;
238 int r;
239
240 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
241 if (!ctx)
242 return -ENOMEM;
243
244 mutex_lock(&mgr->lock);
245 r = idr_alloc(&mgr->ctx_handles, ctx, 1, AMDGPU_VM_MAX_NUM_CTX, GFP_KERNEL);
246 if (r < 0) {
247 mutex_unlock(&mgr->lock);
248 kfree(ctx);
249 return r;
250 }
251
252 *id = (uint32_t)r;
253 r = amdgpu_ctx_init(adev, priority, filp, ctx);
254 if (r) {
255 idr_remove(&mgr->ctx_handles, *id);
256 *id = 0;
257 kfree(ctx);
258 }
259 mutex_unlock(&mgr->lock);
260 return r;
261}
262
263static void amdgpu_ctx_do_release(struct kref *ref)
264{
265 struct amdgpu_ctx *ctx;
266 u32 i, j;
267
268 ctx = container_of(ref, struct amdgpu_ctx, refcount);
269 for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
270 for (j = 0; j < amdgpu_ctx_num_entities[i]; ++j) {
271 if (!ctx->entities[i][j])
272 continue;
273
274 drm_sched_entity_destroy(&ctx->entities[i][j]->entity);
275 }
276 }
277
278 amdgpu_ctx_fini(ref);
279}
280
281static int amdgpu_ctx_free(struct amdgpu_fpriv *fpriv, uint32_t id)
282{
283 struct amdgpu_ctx_mgr *mgr = &fpriv->ctx_mgr;
284 struct amdgpu_ctx *ctx;
285
286 mutex_lock(&mgr->lock);
287 ctx = idr_remove(&mgr->ctx_handles, id);
288 if (ctx)
289 kref_put(&ctx->refcount, amdgpu_ctx_do_release);
290 mutex_unlock(&mgr->lock);
291 return ctx ? 0 : -EINVAL;
292}
293
294static int amdgpu_ctx_query(struct amdgpu_device *adev,
295 struct amdgpu_fpriv *fpriv, uint32_t id,
296 union drm_amdgpu_ctx_out *out)
297{
298 struct amdgpu_ctx *ctx;
299 struct amdgpu_ctx_mgr *mgr;
300 unsigned reset_counter;
301
302 if (!fpriv)
303 return -EINVAL;
304
305 mgr = &fpriv->ctx_mgr;
306 mutex_lock(&mgr->lock);
307 ctx = idr_find(&mgr->ctx_handles, id);
308 if (!ctx) {
309 mutex_unlock(&mgr->lock);
310 return -EINVAL;
311 }
312
313 /* TODO: these two are always zero */
314 out->state.flags = 0x0;
315 out->state.hangs = 0x0;
316
317 /* determine if a GPU reset has occured since the last call */
318 reset_counter = atomic_read(&adev->gpu_reset_counter);
319 /* TODO: this should ideally return NO, GUILTY, or INNOCENT. */
320 if (ctx->reset_counter_query == reset_counter)
321 out->state.reset_status = AMDGPU_CTX_NO_RESET;
322 else
323 out->state.reset_status = AMDGPU_CTX_UNKNOWN_RESET;
324 ctx->reset_counter_query = reset_counter;
325
326 mutex_unlock(&mgr->lock);
327 return 0;
328}
329
330static int amdgpu_ctx_query2(struct amdgpu_device *adev,
331 struct amdgpu_fpriv *fpriv, uint32_t id,
332 union drm_amdgpu_ctx_out *out)
333{
334 struct amdgpu_ctx *ctx;
335 struct amdgpu_ctx_mgr *mgr;
336 unsigned long ras_counter;
337
338 if (!fpriv)
339 return -EINVAL;
340
341 mgr = &fpriv->ctx_mgr;
342 mutex_lock(&mgr->lock);
343 ctx = idr_find(&mgr->ctx_handles, id);
344 if (!ctx) {
345 mutex_unlock(&mgr->lock);
346 return -EINVAL;
347 }
348
349 out->state.flags = 0x0;
350 out->state.hangs = 0x0;
351
352 if (ctx->reset_counter != atomic_read(&adev->gpu_reset_counter))
353 out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_RESET;
354
355 if (ctx->vram_lost_counter != atomic_read(&adev->vram_lost_counter))
356 out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_VRAMLOST;
357
358 if (atomic_read(&ctx->guilty))
359 out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_GUILTY;
360
361 /*query ue count*/
362 ras_counter = amdgpu_ras_query_error_count(adev, false);
363 /*ras counter is monotonic increasing*/
364 if (ras_counter != ctx->ras_counter_ue) {
365 out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_RAS_UE;
366 ctx->ras_counter_ue = ras_counter;
367 }
368
369 /*query ce count*/
370 ras_counter = amdgpu_ras_query_error_count(adev, true);
371 if (ras_counter != ctx->ras_counter_ce) {
372 out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_RAS_CE;
373 ctx->ras_counter_ce = ras_counter;
374 }
375
376 mutex_unlock(&mgr->lock);
377 return 0;
378}
379
380int amdgpu_ctx_ioctl(struct drm_device *dev, void *data,
381 struct drm_file *filp)
382{
383 int r;
384 uint32_t id;
385 enum drm_sched_priority priority;
386
387 union drm_amdgpu_ctx *args = data;
388 struct amdgpu_device *adev = dev->dev_private;
389 struct amdgpu_fpriv *fpriv = filp->driver_priv;
390
391 r = 0;
392 id = args->in.ctx_id;
393 priority = amdgpu_to_sched_priority(args->in.priority);
394
395 /* For backwards compatibility reasons, we need to accept
396 * ioctls with garbage in the priority field */
397 if (priority == DRM_SCHED_PRIORITY_INVALID)
398 priority = DRM_SCHED_PRIORITY_NORMAL;
399
400 switch (args->in.op) {
401 case AMDGPU_CTX_OP_ALLOC_CTX:
402 r = amdgpu_ctx_alloc(adev, fpriv, filp, priority, &id);
403 args->out.alloc.ctx_id = id;
404 break;
405 case AMDGPU_CTX_OP_FREE_CTX:
406 r = amdgpu_ctx_free(fpriv, id);
407 break;
408 case AMDGPU_CTX_OP_QUERY_STATE:
409 r = amdgpu_ctx_query(adev, fpriv, id, &args->out);
410 break;
411 case AMDGPU_CTX_OP_QUERY_STATE2:
412 r = amdgpu_ctx_query2(adev, fpriv, id, &args->out);
413 break;
414 default:
415 return -EINVAL;
416 }
417
418 return r;
419}
420
421struct amdgpu_ctx *amdgpu_ctx_get(struct amdgpu_fpriv *fpriv, uint32_t id)
422{
423 struct amdgpu_ctx *ctx;
424 struct amdgpu_ctx_mgr *mgr;
425
426 if (!fpriv)
427 return NULL;
428
429 mgr = &fpriv->ctx_mgr;
430
431 mutex_lock(&mgr->lock);
432 ctx = idr_find(&mgr->ctx_handles, id);
433 if (ctx)
434 kref_get(&ctx->refcount);
435 mutex_unlock(&mgr->lock);
436 return ctx;
437}
438
439int amdgpu_ctx_put(struct amdgpu_ctx *ctx)
440{
441 if (ctx == NULL)
442 return -EINVAL;
443
444 kref_put(&ctx->refcount, amdgpu_ctx_do_release);
445 return 0;
446}
447
448void amdgpu_ctx_add_fence(struct amdgpu_ctx *ctx,
449 struct drm_sched_entity *entity,
450 struct dma_fence *fence, uint64_t* handle)
451{
452 struct amdgpu_ctx_entity *centity = to_amdgpu_ctx_entity(entity);
453 uint64_t seq = centity->sequence;
454 struct dma_fence *other = NULL;
455 unsigned idx = 0;
456
457 idx = seq & (amdgpu_sched_jobs - 1);
458 other = centity->fences[idx];
459 if (other)
460 BUG_ON(!dma_fence_is_signaled(other));
461
462 dma_fence_get(fence);
463
464 spin_lock(&ctx->ring_lock);
465 centity->fences[idx] = fence;
466 centity->sequence++;
467 spin_unlock(&ctx->ring_lock);
468
469 dma_fence_put(other);
470 if (handle)
471 *handle = seq;
472}
473
474struct dma_fence *amdgpu_ctx_get_fence(struct amdgpu_ctx *ctx,
475 struct drm_sched_entity *entity,
476 uint64_t seq)
477{
478 struct amdgpu_ctx_entity *centity = to_amdgpu_ctx_entity(entity);
479 struct dma_fence *fence;
480
481 spin_lock(&ctx->ring_lock);
482
483 if (seq == ~0ull)
484 seq = centity->sequence - 1;
485
486 if (seq >= centity->sequence) {
487 spin_unlock(&ctx->ring_lock);
488 return ERR_PTR(-EINVAL);
489 }
490
491
492 if (seq + amdgpu_sched_jobs < centity->sequence) {
493 spin_unlock(&ctx->ring_lock);
494 return NULL;
495 }
496
497 fence = dma_fence_get(centity->fences[seq & (amdgpu_sched_jobs - 1)]);
498 spin_unlock(&ctx->ring_lock);
499
500 return fence;
501}
502
503static void amdgpu_ctx_set_entity_priority(struct amdgpu_ctx *ctx,
504 struct amdgpu_ctx_entity *aentity,
505 int hw_ip,
506 enum drm_sched_priority priority)
507{
508 struct amdgpu_device *adev = ctx->adev;
509 unsigned int hw_prio;
510 struct drm_gpu_scheduler **scheds = NULL;
511 unsigned num_scheds;
512
513 /* set sw priority */
514 drm_sched_entity_set_priority(&aentity->entity, priority);
515
516 /* set hw priority */
517 if (hw_ip == AMDGPU_HW_IP_COMPUTE) {
518 hw_prio = amdgpu_ctx_prio_sched_to_hw(adev, priority,
519 AMDGPU_HW_IP_COMPUTE);
520 hw_prio = array_index_nospec(hw_prio, AMDGPU_RING_PRIO_MAX);
521 scheds = adev->gpu_sched[hw_ip][hw_prio].sched;
522 num_scheds = adev->gpu_sched[hw_ip][hw_prio].num_scheds;
523 drm_sched_entity_modify_sched(&aentity->entity, scheds,
524 num_scheds);
525 }
526}
527
528void amdgpu_ctx_priority_override(struct amdgpu_ctx *ctx,
529 enum drm_sched_priority priority)
530{
531 enum drm_sched_priority ctx_prio;
532 unsigned i, j;
533
534 ctx->override_priority = priority;
535
536 ctx_prio = (ctx->override_priority == DRM_SCHED_PRIORITY_UNSET) ?
537 ctx->init_priority : ctx->override_priority;
538 for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
539 for (j = 0; j < amdgpu_ctx_num_entities[i]; ++j) {
540 if (!ctx->entities[i][j])
541 continue;
542
543 amdgpu_ctx_set_entity_priority(ctx, ctx->entities[i][j],
544 i, ctx_prio);
545 }
546 }
547}
548
549int amdgpu_ctx_wait_prev_fence(struct amdgpu_ctx *ctx,
550 struct drm_sched_entity *entity)
551{
552 struct amdgpu_ctx_entity *centity = to_amdgpu_ctx_entity(entity);
553 struct dma_fence *other;
554 unsigned idx;
555 long r;
556
557 spin_lock(&ctx->ring_lock);
558 idx = centity->sequence & (amdgpu_sched_jobs - 1);
559 other = dma_fence_get(centity->fences[idx]);
560 spin_unlock(&ctx->ring_lock);
561
562 if (!other)
563 return 0;
564
565 r = dma_fence_wait(other, true);
566 if (r < 0 && r != -ERESTARTSYS)
567 DRM_ERROR("Error (%ld) waiting for fence!\n", r);
568
569 dma_fence_put(other);
570 return r;
571}
572
573void amdgpu_ctx_mgr_init(struct amdgpu_ctx_mgr *mgr)
574{
575 mutex_init(&mgr->lock);
576 idr_init(&mgr->ctx_handles);
577}
578
579long amdgpu_ctx_mgr_entity_flush(struct amdgpu_ctx_mgr *mgr, long timeout)
580{
581 struct amdgpu_ctx *ctx;
582 struct idr *idp;
583 uint32_t id, i, j;
584
585 idp = &mgr->ctx_handles;
586
587 mutex_lock(&mgr->lock);
588 idr_for_each_entry(idp, ctx, id) {
589 for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
590 for (j = 0; j < amdgpu_ctx_num_entities[i]; ++j) {
591 struct drm_sched_entity *entity;
592
593 if (!ctx->entities[i][j])
594 continue;
595
596 entity = &ctx->entities[i][j]->entity;
597 timeout = drm_sched_entity_flush(entity, timeout);
598 }
599 }
600 }
601 mutex_unlock(&mgr->lock);
602 return timeout;
603}
604
605void amdgpu_ctx_mgr_entity_fini(struct amdgpu_ctx_mgr *mgr)
606{
607 struct amdgpu_ctx *ctx;
608 struct idr *idp;
609 uint32_t id, i, j;
610
611 idp = &mgr->ctx_handles;
612
613 idr_for_each_entry(idp, ctx, id) {
614 if (kref_read(&ctx->refcount) != 1) {
615 DRM_ERROR("ctx %p is still alive\n", ctx);
616 continue;
617 }
618
619 for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
620 for (j = 0; j < amdgpu_ctx_num_entities[i]; ++j) {
621 struct drm_sched_entity *entity;
622
623 if (!ctx->entities[i][j])
624 continue;
625
626 entity = &ctx->entities[i][j]->entity;
627 drm_sched_entity_fini(entity);
628 }
629 }
630 }
631}
632
633void amdgpu_ctx_mgr_fini(struct amdgpu_ctx_mgr *mgr)
634{
635 struct amdgpu_ctx *ctx;
636 struct idr *idp;
637 uint32_t id;
638
639 amdgpu_ctx_mgr_entity_fini(mgr);
640
641 idp = &mgr->ctx_handles;
642
643 idr_for_each_entry(idp, ctx, id) {
644 if (kref_put(&ctx->refcount, amdgpu_ctx_fini) != 1)
645 DRM_ERROR("ctx %p is still alive\n", ctx);
646 }
647
648 idr_destroy(&mgr->ctx_handles);
649 mutex_destroy(&mgr->lock);
650}
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/drmP.h>
26#include <drm/drm_auth.h>
27#include "amdgpu.h"
28#include "amdgpu_sched.h"
29
30static int amdgpu_ctx_priority_permit(struct drm_file *filp,
31 enum drm_sched_priority priority)
32{
33 /* NORMAL and below are accessible by everyone */
34 if (priority <= DRM_SCHED_PRIORITY_NORMAL)
35 return 0;
36
37 if (capable(CAP_SYS_NICE))
38 return 0;
39
40 if (drm_is_current_master(filp))
41 return 0;
42
43 return -EACCES;
44}
45
46static int amdgpu_ctx_init(struct amdgpu_device *adev,
47 enum drm_sched_priority priority,
48 struct drm_file *filp,
49 struct amdgpu_ctx *ctx)
50{
51 unsigned i, j;
52 int r;
53
54 if (priority < 0 || priority >= DRM_SCHED_PRIORITY_MAX)
55 return -EINVAL;
56
57 r = amdgpu_ctx_priority_permit(filp, priority);
58 if (r)
59 return r;
60
61 memset(ctx, 0, sizeof(*ctx));
62 ctx->adev = adev;
63 kref_init(&ctx->refcount);
64 spin_lock_init(&ctx->ring_lock);
65 ctx->fences = kcalloc(amdgpu_sched_jobs * AMDGPU_MAX_RINGS,
66 sizeof(struct dma_fence*), GFP_KERNEL);
67 if (!ctx->fences)
68 return -ENOMEM;
69
70 mutex_init(&ctx->lock);
71
72 for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
73 ctx->rings[i].sequence = 1;
74 ctx->rings[i].fences = &ctx->fences[amdgpu_sched_jobs * i];
75 }
76
77 ctx->reset_counter = atomic_read(&adev->gpu_reset_counter);
78 ctx->reset_counter_query = ctx->reset_counter;
79 ctx->vram_lost_counter = atomic_read(&adev->vram_lost_counter);
80 ctx->init_priority = priority;
81 ctx->override_priority = DRM_SCHED_PRIORITY_UNSET;
82
83 /* create context entity for each ring */
84 for (i = 0; i < adev->num_rings; i++) {
85 struct amdgpu_ring *ring = adev->rings[i];
86 struct drm_sched_rq *rq;
87
88 rq = &ring->sched.sched_rq[priority];
89
90 if (ring == &adev->gfx.kiq.ring)
91 continue;
92
93 r = drm_sched_entity_init(&ring->sched, &ctx->rings[i].entity,
94 rq, amdgpu_sched_jobs, &ctx->guilty);
95 if (r)
96 goto failed;
97 }
98
99 r = amdgpu_queue_mgr_init(adev, &ctx->queue_mgr);
100 if (r)
101 goto failed;
102
103 return 0;
104
105failed:
106 for (j = 0; j < i; j++)
107 drm_sched_entity_fini(&adev->rings[j]->sched,
108 &ctx->rings[j].entity);
109 kfree(ctx->fences);
110 ctx->fences = NULL;
111 return r;
112}
113
114static void amdgpu_ctx_fini(struct amdgpu_ctx *ctx)
115{
116 struct amdgpu_device *adev = ctx->adev;
117 unsigned i, j;
118
119 if (!adev)
120 return;
121
122 for (i = 0; i < AMDGPU_MAX_RINGS; ++i)
123 for (j = 0; j < amdgpu_sched_jobs; ++j)
124 dma_fence_put(ctx->rings[i].fences[j]);
125 kfree(ctx->fences);
126 ctx->fences = NULL;
127
128 for (i = 0; i < adev->num_rings; i++)
129 drm_sched_entity_fini(&adev->rings[i]->sched,
130 &ctx->rings[i].entity);
131
132 amdgpu_queue_mgr_fini(adev, &ctx->queue_mgr);
133
134 mutex_destroy(&ctx->lock);
135}
136
137static int amdgpu_ctx_alloc(struct amdgpu_device *adev,
138 struct amdgpu_fpriv *fpriv,
139 struct drm_file *filp,
140 enum drm_sched_priority priority,
141 uint32_t *id)
142{
143 struct amdgpu_ctx_mgr *mgr = &fpriv->ctx_mgr;
144 struct amdgpu_ctx *ctx;
145 int r;
146
147 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
148 if (!ctx)
149 return -ENOMEM;
150
151 mutex_lock(&mgr->lock);
152 r = idr_alloc(&mgr->ctx_handles, ctx, 1, 0, GFP_KERNEL);
153 if (r < 0) {
154 mutex_unlock(&mgr->lock);
155 kfree(ctx);
156 return r;
157 }
158
159 *id = (uint32_t)r;
160 r = amdgpu_ctx_init(adev, priority, filp, ctx);
161 if (r) {
162 idr_remove(&mgr->ctx_handles, *id);
163 *id = 0;
164 kfree(ctx);
165 }
166 mutex_unlock(&mgr->lock);
167 return r;
168}
169
170static void amdgpu_ctx_do_release(struct kref *ref)
171{
172 struct amdgpu_ctx *ctx;
173
174 ctx = container_of(ref, struct amdgpu_ctx, refcount);
175
176 amdgpu_ctx_fini(ctx);
177
178 kfree(ctx);
179}
180
181static int amdgpu_ctx_free(struct amdgpu_fpriv *fpriv, uint32_t id)
182{
183 struct amdgpu_ctx_mgr *mgr = &fpriv->ctx_mgr;
184 struct amdgpu_ctx *ctx;
185
186 mutex_lock(&mgr->lock);
187 ctx = idr_remove(&mgr->ctx_handles, id);
188 if (ctx)
189 kref_put(&ctx->refcount, amdgpu_ctx_do_release);
190 mutex_unlock(&mgr->lock);
191 return ctx ? 0 : -EINVAL;
192}
193
194static int amdgpu_ctx_query(struct amdgpu_device *adev,
195 struct amdgpu_fpriv *fpriv, uint32_t id,
196 union drm_amdgpu_ctx_out *out)
197{
198 struct amdgpu_ctx *ctx;
199 struct amdgpu_ctx_mgr *mgr;
200 unsigned reset_counter;
201
202 if (!fpriv)
203 return -EINVAL;
204
205 mgr = &fpriv->ctx_mgr;
206 mutex_lock(&mgr->lock);
207 ctx = idr_find(&mgr->ctx_handles, id);
208 if (!ctx) {
209 mutex_unlock(&mgr->lock);
210 return -EINVAL;
211 }
212
213 /* TODO: these two are always zero */
214 out->state.flags = 0x0;
215 out->state.hangs = 0x0;
216
217 /* determine if a GPU reset has occured since the last call */
218 reset_counter = atomic_read(&adev->gpu_reset_counter);
219 /* TODO: this should ideally return NO, GUILTY, or INNOCENT. */
220 if (ctx->reset_counter_query == reset_counter)
221 out->state.reset_status = AMDGPU_CTX_NO_RESET;
222 else
223 out->state.reset_status = AMDGPU_CTX_UNKNOWN_RESET;
224 ctx->reset_counter_query = reset_counter;
225
226 mutex_unlock(&mgr->lock);
227 return 0;
228}
229
230static int amdgpu_ctx_query2(struct amdgpu_device *adev,
231 struct amdgpu_fpriv *fpriv, uint32_t id,
232 union drm_amdgpu_ctx_out *out)
233{
234 struct amdgpu_ctx *ctx;
235 struct amdgpu_ctx_mgr *mgr;
236
237 if (!fpriv)
238 return -EINVAL;
239
240 mgr = &fpriv->ctx_mgr;
241 mutex_lock(&mgr->lock);
242 ctx = idr_find(&mgr->ctx_handles, id);
243 if (!ctx) {
244 mutex_unlock(&mgr->lock);
245 return -EINVAL;
246 }
247
248 out->state.flags = 0x0;
249 out->state.hangs = 0x0;
250
251 if (ctx->reset_counter != atomic_read(&adev->gpu_reset_counter))
252 out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_RESET;
253
254 if (ctx->vram_lost_counter != atomic_read(&adev->vram_lost_counter))
255 out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_VRAMLOST;
256
257 if (atomic_read(&ctx->guilty))
258 out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_GUILTY;
259
260 mutex_unlock(&mgr->lock);
261 return 0;
262}
263
264int amdgpu_ctx_ioctl(struct drm_device *dev, void *data,
265 struct drm_file *filp)
266{
267 int r;
268 uint32_t id;
269 enum drm_sched_priority priority;
270
271 union drm_amdgpu_ctx *args = data;
272 struct amdgpu_device *adev = dev->dev_private;
273 struct amdgpu_fpriv *fpriv = filp->driver_priv;
274
275 r = 0;
276 id = args->in.ctx_id;
277 priority = amdgpu_to_sched_priority(args->in.priority);
278
279 /* For backwards compatibility reasons, we need to accept
280 * ioctls with garbage in the priority field */
281 if (priority == DRM_SCHED_PRIORITY_INVALID)
282 priority = DRM_SCHED_PRIORITY_NORMAL;
283
284 switch (args->in.op) {
285 case AMDGPU_CTX_OP_ALLOC_CTX:
286 r = amdgpu_ctx_alloc(adev, fpriv, filp, priority, &id);
287 args->out.alloc.ctx_id = id;
288 break;
289 case AMDGPU_CTX_OP_FREE_CTX:
290 r = amdgpu_ctx_free(fpriv, id);
291 break;
292 case AMDGPU_CTX_OP_QUERY_STATE:
293 r = amdgpu_ctx_query(adev, fpriv, id, &args->out);
294 break;
295 case AMDGPU_CTX_OP_QUERY_STATE2:
296 r = amdgpu_ctx_query2(adev, fpriv, id, &args->out);
297 break;
298 default:
299 return -EINVAL;
300 }
301
302 return r;
303}
304
305struct amdgpu_ctx *amdgpu_ctx_get(struct amdgpu_fpriv *fpriv, uint32_t id)
306{
307 struct amdgpu_ctx *ctx;
308 struct amdgpu_ctx_mgr *mgr;
309
310 if (!fpriv)
311 return NULL;
312
313 mgr = &fpriv->ctx_mgr;
314
315 mutex_lock(&mgr->lock);
316 ctx = idr_find(&mgr->ctx_handles, id);
317 if (ctx)
318 kref_get(&ctx->refcount);
319 mutex_unlock(&mgr->lock);
320 return ctx;
321}
322
323int amdgpu_ctx_put(struct amdgpu_ctx *ctx)
324{
325 if (ctx == NULL)
326 return -EINVAL;
327
328 kref_put(&ctx->refcount, amdgpu_ctx_do_release);
329 return 0;
330}
331
332int amdgpu_ctx_add_fence(struct amdgpu_ctx *ctx, struct amdgpu_ring *ring,
333 struct dma_fence *fence, uint64_t* handler)
334{
335 struct amdgpu_ctx_ring *cring = & ctx->rings[ring->idx];
336 uint64_t seq = cring->sequence;
337 unsigned idx = 0;
338 struct dma_fence *other = NULL;
339
340 idx = seq & (amdgpu_sched_jobs - 1);
341 other = cring->fences[idx];
342 if (other)
343 BUG_ON(!dma_fence_is_signaled(other));
344
345 dma_fence_get(fence);
346
347 spin_lock(&ctx->ring_lock);
348 cring->fences[idx] = fence;
349 cring->sequence++;
350 spin_unlock(&ctx->ring_lock);
351
352 dma_fence_put(other);
353 if (handler)
354 *handler = seq;
355
356 return 0;
357}
358
359struct dma_fence *amdgpu_ctx_get_fence(struct amdgpu_ctx *ctx,
360 struct amdgpu_ring *ring, uint64_t seq)
361{
362 struct amdgpu_ctx_ring *cring = & ctx->rings[ring->idx];
363 struct dma_fence *fence;
364
365 spin_lock(&ctx->ring_lock);
366
367 if (seq == ~0ull)
368 seq = ctx->rings[ring->idx].sequence - 1;
369
370 if (seq >= cring->sequence) {
371 spin_unlock(&ctx->ring_lock);
372 return ERR_PTR(-EINVAL);
373 }
374
375
376 if (seq + amdgpu_sched_jobs < cring->sequence) {
377 spin_unlock(&ctx->ring_lock);
378 return NULL;
379 }
380
381 fence = dma_fence_get(cring->fences[seq & (amdgpu_sched_jobs - 1)]);
382 spin_unlock(&ctx->ring_lock);
383
384 return fence;
385}
386
387void amdgpu_ctx_priority_override(struct amdgpu_ctx *ctx,
388 enum drm_sched_priority priority)
389{
390 int i;
391 struct amdgpu_device *adev = ctx->adev;
392 struct drm_sched_rq *rq;
393 struct drm_sched_entity *entity;
394 struct amdgpu_ring *ring;
395 enum drm_sched_priority ctx_prio;
396
397 ctx->override_priority = priority;
398
399 ctx_prio = (ctx->override_priority == DRM_SCHED_PRIORITY_UNSET) ?
400 ctx->init_priority : ctx->override_priority;
401
402 for (i = 0; i < adev->num_rings; i++) {
403 ring = adev->rings[i];
404 entity = &ctx->rings[i].entity;
405 rq = &ring->sched.sched_rq[ctx_prio];
406
407 if (ring->funcs->type == AMDGPU_RING_TYPE_KIQ)
408 continue;
409
410 drm_sched_entity_set_rq(entity, rq);
411 }
412}
413
414int amdgpu_ctx_wait_prev_fence(struct amdgpu_ctx *ctx, unsigned ring_id)
415{
416 struct amdgpu_ctx_ring *cring = &ctx->rings[ring_id];
417 unsigned idx = cring->sequence & (amdgpu_sched_jobs - 1);
418 struct dma_fence *other = cring->fences[idx];
419
420 if (other) {
421 signed long r;
422 r = dma_fence_wait(other, true);
423 if (r < 0) {
424 if (r != -ERESTARTSYS)
425 DRM_ERROR("Error (%ld) waiting for fence!\n", r);
426
427 return r;
428 }
429 }
430
431 return 0;
432}
433
434void amdgpu_ctx_mgr_init(struct amdgpu_ctx_mgr *mgr)
435{
436 mutex_init(&mgr->lock);
437 idr_init(&mgr->ctx_handles);
438}
439
440void amdgpu_ctx_mgr_fini(struct amdgpu_ctx_mgr *mgr)
441{
442 struct amdgpu_ctx *ctx;
443 struct idr *idp;
444 uint32_t id;
445
446 idp = &mgr->ctx_handles;
447
448 idr_for_each_entry(idp, ctx, id) {
449 if (kref_put(&ctx->refcount, amdgpu_ctx_do_release) != 1)
450 DRM_ERROR("ctx %p is still alive\n", ctx);
451 }
452
453 idr_destroy(&mgr->ctx_handles);
454 mutex_destroy(&mgr->lock);
455}