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.
28 int amdgpu_ctx_init(struct amdgpu_device *adev, enum amd_sched_priority pri,
29 struct amdgpu_ctx *ctx)
34 memset(ctx, 0, sizeof(*ctx));
36 kref_init(&ctx->refcount);
37 spin_lock_init(&ctx->ring_lock);
38 ctx->fences = kzalloc(sizeof(struct fence *) * amdgpu_sched_jobs *
39 AMDGPU_MAX_RINGS, GFP_KERNEL);
43 for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
44 ctx->rings[i].sequence = 1;
45 ctx->rings[i].fences = (void *)ctx->fences + sizeof(struct fence *) *
46 amdgpu_sched_jobs * i;
48 if (amdgpu_enable_scheduler) {
49 /* create context entity for each ring */
50 for (i = 0; i < adev->num_rings; i++) {
51 struct amd_sched_rq *rq;
52 if (pri >= AMD_SCHED_MAX_PRIORITY) {
56 rq = &adev->rings[i]->sched.sched_rq[pri];
57 r = amd_sched_entity_init(&adev->rings[i]->sched,
58 &ctx->rings[i].entity,
59 rq, amdgpu_sched_jobs);
64 if (i < adev->num_rings) {
65 for (j = 0; j < i; j++)
66 amd_sched_entity_fini(&adev->rings[j]->sched,
67 &ctx->rings[j].entity);
75 void amdgpu_ctx_fini(struct amdgpu_ctx *ctx)
77 struct amdgpu_device *adev = ctx->adev;
83 for (i = 0; i < AMDGPU_MAX_RINGS; ++i)
84 for (j = 0; j < amdgpu_sched_jobs; ++j)
85 fence_put(ctx->rings[i].fences[j]);
88 if (amdgpu_enable_scheduler) {
89 for (i = 0; i < adev->num_rings; i++)
90 amd_sched_entity_fini(&adev->rings[i]->sched,
91 &ctx->rings[i].entity);
95 static int amdgpu_ctx_alloc(struct amdgpu_device *adev,
96 struct amdgpu_fpriv *fpriv,
99 struct amdgpu_ctx_mgr *mgr = &fpriv->ctx_mgr;
100 struct amdgpu_ctx *ctx;
103 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
107 mutex_lock(&mgr->lock);
108 r = idr_alloc(&mgr->ctx_handles, ctx, 1, 0, GFP_KERNEL);
110 mutex_unlock(&mgr->lock);
115 r = amdgpu_ctx_init(adev, AMD_SCHED_PRIORITY_NORMAL, ctx);
117 idr_remove(&mgr->ctx_handles, *id);
121 mutex_unlock(&mgr->lock);
125 static void amdgpu_ctx_do_release(struct kref *ref)
127 struct amdgpu_ctx *ctx;
129 ctx = container_of(ref, struct amdgpu_ctx, refcount);
131 amdgpu_ctx_fini(ctx);
136 static int amdgpu_ctx_free(struct amdgpu_fpriv *fpriv, uint32_t id)
138 struct amdgpu_ctx_mgr *mgr = &fpriv->ctx_mgr;
139 struct amdgpu_ctx *ctx;
141 mutex_lock(&mgr->lock);
142 ctx = idr_find(&mgr->ctx_handles, id);
144 idr_remove(&mgr->ctx_handles, id);
145 kref_put(&ctx->refcount, amdgpu_ctx_do_release);
146 mutex_unlock(&mgr->lock);
149 mutex_unlock(&mgr->lock);
153 static int amdgpu_ctx_query(struct amdgpu_device *adev,
154 struct amdgpu_fpriv *fpriv, uint32_t id,
155 union drm_amdgpu_ctx_out *out)
157 struct amdgpu_ctx *ctx;
158 struct amdgpu_ctx_mgr *mgr;
159 unsigned reset_counter;
164 mgr = &fpriv->ctx_mgr;
165 mutex_lock(&mgr->lock);
166 ctx = idr_find(&mgr->ctx_handles, id);
168 mutex_unlock(&mgr->lock);
172 /* TODO: these two are always zero */
173 out->state.flags = 0x0;
174 out->state.hangs = 0x0;
176 /* determine if a GPU reset has occured since the last call */
177 reset_counter = atomic_read(&adev->gpu_reset_counter);
178 /* TODO: this should ideally return NO, GUILTY, or INNOCENT. */
179 if (ctx->reset_counter == reset_counter)
180 out->state.reset_status = AMDGPU_CTX_NO_RESET;
182 out->state.reset_status = AMDGPU_CTX_UNKNOWN_RESET;
183 ctx->reset_counter = reset_counter;
185 mutex_unlock(&mgr->lock);
189 int amdgpu_ctx_ioctl(struct drm_device *dev, void *data,
190 struct drm_file *filp)
195 union drm_amdgpu_ctx *args = data;
196 struct amdgpu_device *adev = dev->dev_private;
197 struct amdgpu_fpriv *fpriv = filp->driver_priv;
200 id = args->in.ctx_id;
202 switch (args->in.op) {
203 case AMDGPU_CTX_OP_ALLOC_CTX:
204 r = amdgpu_ctx_alloc(adev, fpriv, &id);
205 args->out.alloc.ctx_id = id;
207 case AMDGPU_CTX_OP_FREE_CTX:
208 r = amdgpu_ctx_free(fpriv, id);
210 case AMDGPU_CTX_OP_QUERY_STATE:
211 r = amdgpu_ctx_query(adev, fpriv, id, &args->out);
220 struct amdgpu_ctx *amdgpu_ctx_get(struct amdgpu_fpriv *fpriv, uint32_t id)
222 struct amdgpu_ctx *ctx;
223 struct amdgpu_ctx_mgr *mgr;
228 mgr = &fpriv->ctx_mgr;
230 mutex_lock(&mgr->lock);
231 ctx = idr_find(&mgr->ctx_handles, id);
233 kref_get(&ctx->refcount);
234 mutex_unlock(&mgr->lock);
238 int amdgpu_ctx_put(struct amdgpu_ctx *ctx)
243 kref_put(&ctx->refcount, amdgpu_ctx_do_release);
247 uint64_t amdgpu_ctx_add_fence(struct amdgpu_ctx *ctx, struct amdgpu_ring *ring,
250 struct amdgpu_ctx_ring *cring = & ctx->rings[ring->idx];
251 uint64_t seq = cring->sequence;
253 struct fence *other = NULL;
255 idx = seq & (amdgpu_sched_jobs - 1);
256 other = cring->fences[idx];
259 r = fence_wait_timeout(other, false, MAX_SCHEDULE_TIMEOUT);
261 DRM_ERROR("Error (%ld) waiting for fence!\n", r);
266 spin_lock(&ctx->ring_lock);
267 cring->fences[idx] = fence;
269 spin_unlock(&ctx->ring_lock);
276 struct fence *amdgpu_ctx_get_fence(struct amdgpu_ctx *ctx,
277 struct amdgpu_ring *ring, uint64_t seq)
279 struct amdgpu_ctx_ring *cring = & ctx->rings[ring->idx];
282 spin_lock(&ctx->ring_lock);
284 if (seq >= cring->sequence) {
285 spin_unlock(&ctx->ring_lock);
286 return ERR_PTR(-EINVAL);
290 if (seq + amdgpu_sched_jobs < cring->sequence) {
291 spin_unlock(&ctx->ring_lock);
295 fence = fence_get(cring->fences[seq & (amdgpu_sched_jobs - 1)]);
296 spin_unlock(&ctx->ring_lock);
301 void amdgpu_ctx_mgr_init(struct amdgpu_ctx_mgr *mgr)
303 mutex_init(&mgr->lock);
304 idr_init(&mgr->ctx_handles);
307 void amdgpu_ctx_mgr_fini(struct amdgpu_ctx_mgr *mgr)
309 struct amdgpu_ctx *ctx;
313 idp = &mgr->ctx_handles;
315 idr_for_each_entry(idp, ctx, id) {
316 if (kref_put(&ctx->refcount, amdgpu_ctx_do_release) != 1)
317 DRM_ERROR("ctx %p is still alive\n", ctx);
320 idr_destroy(&mgr->ctx_handles);
321 mutex_destroy(&mgr->lock);