2 * Copyright 2015 Advanced Micro Devices, Inc.
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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.
26 #include <drm/drm_auth.h>
28 #include "amdgpu_sched.h"
30 static int amdgpu_ctx_priority_permit(struct drm_file *filp,
31 enum drm_sched_priority priority)
33 /* NORMAL and below are accessible by everyone */
34 if (priority <= DRM_SCHED_PRIORITY_NORMAL)
37 if (capable(CAP_SYS_NICE))
40 if (drm_is_current_master(filp))
46 static int amdgpu_ctx_init(struct amdgpu_device *adev,
47 enum drm_sched_priority priority,
48 struct drm_file *filp,
49 struct amdgpu_ctx *ctx)
54 if (priority < 0 || priority >= DRM_SCHED_PRIORITY_MAX)
57 r = amdgpu_ctx_priority_permit(filp, priority);
61 memset(ctx, 0, sizeof(*ctx));
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);
70 mutex_init(&ctx->lock);
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];
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;
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;
88 rq = &ring->sched.sched_rq[priority];
90 if (ring == &adev->gfx.kiq.ring)
93 r = drm_sched_entity_init(&ring->sched, &ctx->rings[i].entity,
94 rq, amdgpu_sched_jobs, &ctx->guilty);
99 r = amdgpu_queue_mgr_init(adev, &ctx->queue_mgr);
106 for (j = 0; j < i; j++)
107 drm_sched_entity_fini(&adev->rings[j]->sched,
108 &ctx->rings[j].entity);
114 static void amdgpu_ctx_fini(struct amdgpu_ctx *ctx)
116 struct amdgpu_device *adev = ctx->adev;
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]);
128 for (i = 0; i < adev->num_rings; i++)
129 drm_sched_entity_fini(&adev->rings[i]->sched,
130 &ctx->rings[i].entity);
132 amdgpu_queue_mgr_fini(adev, &ctx->queue_mgr);
134 mutex_destroy(&ctx->lock);
137 static int amdgpu_ctx_alloc(struct amdgpu_device *adev,
138 struct amdgpu_fpriv *fpriv,
139 struct drm_file *filp,
140 enum drm_sched_priority priority,
143 struct amdgpu_ctx_mgr *mgr = &fpriv->ctx_mgr;
144 struct amdgpu_ctx *ctx;
147 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
151 mutex_lock(&mgr->lock);
152 r = idr_alloc(&mgr->ctx_handles, ctx, 1, 0, GFP_KERNEL);
154 mutex_unlock(&mgr->lock);
160 r = amdgpu_ctx_init(adev, priority, filp, ctx);
162 idr_remove(&mgr->ctx_handles, *id);
166 mutex_unlock(&mgr->lock);
170 static void amdgpu_ctx_do_release(struct kref *ref)
172 struct amdgpu_ctx *ctx;
174 ctx = container_of(ref, struct amdgpu_ctx, refcount);
176 amdgpu_ctx_fini(ctx);
181 static int amdgpu_ctx_free(struct amdgpu_fpriv *fpriv, uint32_t id)
183 struct amdgpu_ctx_mgr *mgr = &fpriv->ctx_mgr;
184 struct amdgpu_ctx *ctx;
186 mutex_lock(&mgr->lock);
187 ctx = idr_remove(&mgr->ctx_handles, id);
189 kref_put(&ctx->refcount, amdgpu_ctx_do_release);
190 mutex_unlock(&mgr->lock);
191 return ctx ? 0 : -EINVAL;
194 static int amdgpu_ctx_query(struct amdgpu_device *adev,
195 struct amdgpu_fpriv *fpriv, uint32_t id,
196 union drm_amdgpu_ctx_out *out)
198 struct amdgpu_ctx *ctx;
199 struct amdgpu_ctx_mgr *mgr;
200 unsigned reset_counter;
205 mgr = &fpriv->ctx_mgr;
206 mutex_lock(&mgr->lock);
207 ctx = idr_find(&mgr->ctx_handles, id);
209 mutex_unlock(&mgr->lock);
213 /* TODO: these two are always zero */
214 out->state.flags = 0x0;
215 out->state.hangs = 0x0;
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;
223 out->state.reset_status = AMDGPU_CTX_UNKNOWN_RESET;
224 ctx->reset_counter_query = reset_counter;
226 mutex_unlock(&mgr->lock);
230 static int amdgpu_ctx_query2(struct amdgpu_device *adev,
231 struct amdgpu_fpriv *fpriv, uint32_t id,
232 union drm_amdgpu_ctx_out *out)
234 struct amdgpu_ctx *ctx;
235 struct amdgpu_ctx_mgr *mgr;
240 mgr = &fpriv->ctx_mgr;
241 mutex_lock(&mgr->lock);
242 ctx = idr_find(&mgr->ctx_handles, id);
244 mutex_unlock(&mgr->lock);
248 out->state.flags = 0x0;
249 out->state.hangs = 0x0;
251 if (ctx->reset_counter != atomic_read(&adev->gpu_reset_counter))
252 out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_RESET;
254 if (ctx->vram_lost_counter != atomic_read(&adev->vram_lost_counter))
255 out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_VRAMLOST;
257 if (atomic_read(&ctx->guilty))
258 out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_GUILTY;
260 mutex_unlock(&mgr->lock);
264 int amdgpu_ctx_ioctl(struct drm_device *dev, void *data,
265 struct drm_file *filp)
269 enum drm_sched_priority priority;
271 union drm_amdgpu_ctx *args = data;
272 struct amdgpu_device *adev = dev->dev_private;
273 struct amdgpu_fpriv *fpriv = filp->driver_priv;
276 id = args->in.ctx_id;
277 priority = amdgpu_to_sched_priority(args->in.priority);
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;
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;
289 case AMDGPU_CTX_OP_FREE_CTX:
290 r = amdgpu_ctx_free(fpriv, id);
292 case AMDGPU_CTX_OP_QUERY_STATE:
293 r = amdgpu_ctx_query(adev, fpriv, id, &args->out);
295 case AMDGPU_CTX_OP_QUERY_STATE2:
296 r = amdgpu_ctx_query2(adev, fpriv, id, &args->out);
305 struct amdgpu_ctx *amdgpu_ctx_get(struct amdgpu_fpriv *fpriv, uint32_t id)
307 struct amdgpu_ctx *ctx;
308 struct amdgpu_ctx_mgr *mgr;
313 mgr = &fpriv->ctx_mgr;
315 mutex_lock(&mgr->lock);
316 ctx = idr_find(&mgr->ctx_handles, id);
318 kref_get(&ctx->refcount);
319 mutex_unlock(&mgr->lock);
323 int amdgpu_ctx_put(struct amdgpu_ctx *ctx)
328 kref_put(&ctx->refcount, amdgpu_ctx_do_release);
332 int amdgpu_ctx_add_fence(struct amdgpu_ctx *ctx, struct amdgpu_ring *ring,
333 struct dma_fence *fence, uint64_t* handler)
335 struct amdgpu_ctx_ring *cring = & ctx->rings[ring->idx];
336 uint64_t seq = cring->sequence;
338 struct dma_fence *other = NULL;
340 idx = seq & (amdgpu_sched_jobs - 1);
341 other = cring->fences[idx];
343 BUG_ON(!dma_fence_is_signaled(other));
345 dma_fence_get(fence);
347 spin_lock(&ctx->ring_lock);
348 cring->fences[idx] = fence;
350 spin_unlock(&ctx->ring_lock);
352 dma_fence_put(other);
359 struct dma_fence *amdgpu_ctx_get_fence(struct amdgpu_ctx *ctx,
360 struct amdgpu_ring *ring, uint64_t seq)
362 struct amdgpu_ctx_ring *cring = & ctx->rings[ring->idx];
363 struct dma_fence *fence;
365 spin_lock(&ctx->ring_lock);
368 seq = ctx->rings[ring->idx].sequence - 1;
370 if (seq >= cring->sequence) {
371 spin_unlock(&ctx->ring_lock);
372 return ERR_PTR(-EINVAL);
376 if (seq + amdgpu_sched_jobs < cring->sequence) {
377 spin_unlock(&ctx->ring_lock);
381 fence = dma_fence_get(cring->fences[seq & (amdgpu_sched_jobs - 1)]);
382 spin_unlock(&ctx->ring_lock);
387 void amdgpu_ctx_priority_override(struct amdgpu_ctx *ctx,
388 enum drm_sched_priority priority)
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;
397 ctx->override_priority = priority;
399 ctx_prio = (ctx->override_priority == DRM_SCHED_PRIORITY_UNSET) ?
400 ctx->init_priority : ctx->override_priority;
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];
407 if (ring->funcs->type == AMDGPU_RING_TYPE_KIQ)
410 drm_sched_entity_set_rq(entity, rq);
414 int amdgpu_ctx_wait_prev_fence(struct amdgpu_ctx *ctx, unsigned ring_id)
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];
422 r = dma_fence_wait_timeout(other, false, MAX_SCHEDULE_TIMEOUT);
424 DRM_ERROR("Error (%ld) waiting for fence!\n", r);
432 void amdgpu_ctx_mgr_init(struct amdgpu_ctx_mgr *mgr)
434 mutex_init(&mgr->lock);
435 idr_init(&mgr->ctx_handles);
438 void amdgpu_ctx_mgr_fini(struct amdgpu_ctx_mgr *mgr)
440 struct amdgpu_ctx *ctx;
444 idp = &mgr->ctx_handles;
446 idr_for_each_entry(idp, ctx, id) {
447 if (kref_put(&ctx->refcount, amdgpu_ctx_do_release) != 1)
448 DRM_ERROR("ctx %p is still alive\n", ctx);
451 idr_destroy(&mgr->ctx_handles);
452 mutex_destroy(&mgr->lock);