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 static int amdgpu_ctx_init(struct amdgpu_device *adev, struct amdgpu_ctx *ctx)
33 memset(ctx, 0, sizeof(*ctx));
35 kref_init(&ctx->refcount);
36 spin_lock_init(&ctx->ring_lock);
37 ctx->fences = kcalloc(amdgpu_sched_jobs * AMDGPU_MAX_RINGS,
38 sizeof(struct fence*), GFP_KERNEL);
42 for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
43 ctx->rings[i].sequence = 1;
44 ctx->rings[i].fences = &ctx->fences[amdgpu_sched_jobs * i];
46 /* create context entity for each ring */
47 for (i = 0; i < adev->num_rings; i++) {
48 struct amdgpu_ring *ring = adev->rings[i];
49 struct amd_sched_rq *rq;
51 rq = &ring->sched.sched_rq[AMD_SCHED_PRIORITY_NORMAL];
52 r = amd_sched_entity_init(&ring->sched, &ctx->rings[i].entity,
53 rq, amdgpu_sched_jobs);
58 if (i < adev->num_rings) {
59 for (j = 0; j < i; j++)
60 amd_sched_entity_fini(&adev->rings[j]->sched,
61 &ctx->rings[j].entity);
69 static void amdgpu_ctx_fini(struct amdgpu_ctx *ctx)
71 struct amdgpu_device *adev = ctx->adev;
77 for (i = 0; i < AMDGPU_MAX_RINGS; ++i)
78 for (j = 0; j < amdgpu_sched_jobs; ++j)
79 fence_put(ctx->rings[i].fences[j]);
83 for (i = 0; i < adev->num_rings; i++)
84 amd_sched_entity_fini(&adev->rings[i]->sched,
85 &ctx->rings[i].entity);
88 static int amdgpu_ctx_alloc(struct amdgpu_device *adev,
89 struct amdgpu_fpriv *fpriv,
92 struct amdgpu_ctx_mgr *mgr = &fpriv->ctx_mgr;
93 struct amdgpu_ctx *ctx;
96 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
100 mutex_lock(&mgr->lock);
101 r = idr_alloc(&mgr->ctx_handles, ctx, 1, 0, GFP_KERNEL);
103 mutex_unlock(&mgr->lock);
108 r = amdgpu_ctx_init(adev, ctx);
110 idr_remove(&mgr->ctx_handles, *id);
114 mutex_unlock(&mgr->lock);
118 static void amdgpu_ctx_do_release(struct kref *ref)
120 struct amdgpu_ctx *ctx;
122 ctx = container_of(ref, struct amdgpu_ctx, refcount);
124 amdgpu_ctx_fini(ctx);
129 static int amdgpu_ctx_free(struct amdgpu_fpriv *fpriv, uint32_t id)
131 struct amdgpu_ctx_mgr *mgr = &fpriv->ctx_mgr;
132 struct amdgpu_ctx *ctx;
134 mutex_lock(&mgr->lock);
135 ctx = idr_find(&mgr->ctx_handles, id);
137 idr_remove(&mgr->ctx_handles, id);
138 kref_put(&ctx->refcount, amdgpu_ctx_do_release);
139 mutex_unlock(&mgr->lock);
142 mutex_unlock(&mgr->lock);
146 static int amdgpu_ctx_query(struct amdgpu_device *adev,
147 struct amdgpu_fpriv *fpriv, uint32_t id,
148 union drm_amdgpu_ctx_out *out)
150 struct amdgpu_ctx *ctx;
151 struct amdgpu_ctx_mgr *mgr;
152 unsigned reset_counter;
157 mgr = &fpriv->ctx_mgr;
158 mutex_lock(&mgr->lock);
159 ctx = idr_find(&mgr->ctx_handles, id);
161 mutex_unlock(&mgr->lock);
165 /* TODO: these two are always zero */
166 out->state.flags = 0x0;
167 out->state.hangs = 0x0;
169 /* determine if a GPU reset has occured since the last call */
170 reset_counter = atomic_read(&adev->gpu_reset_counter);
171 /* TODO: this should ideally return NO, GUILTY, or INNOCENT. */
172 if (ctx->reset_counter == reset_counter)
173 out->state.reset_status = AMDGPU_CTX_NO_RESET;
175 out->state.reset_status = AMDGPU_CTX_UNKNOWN_RESET;
176 ctx->reset_counter = reset_counter;
178 mutex_unlock(&mgr->lock);
182 int amdgpu_ctx_ioctl(struct drm_device *dev, void *data,
183 struct drm_file *filp)
188 union drm_amdgpu_ctx *args = data;
189 struct amdgpu_device *adev = dev->dev_private;
190 struct amdgpu_fpriv *fpriv = filp->driver_priv;
193 id = args->in.ctx_id;
195 switch (args->in.op) {
196 case AMDGPU_CTX_OP_ALLOC_CTX:
197 r = amdgpu_ctx_alloc(adev, fpriv, &id);
198 args->out.alloc.ctx_id = id;
200 case AMDGPU_CTX_OP_FREE_CTX:
201 r = amdgpu_ctx_free(fpriv, id);
203 case AMDGPU_CTX_OP_QUERY_STATE:
204 r = amdgpu_ctx_query(adev, fpriv, id, &args->out);
213 struct amdgpu_ctx *amdgpu_ctx_get(struct amdgpu_fpriv *fpriv, uint32_t id)
215 struct amdgpu_ctx *ctx;
216 struct amdgpu_ctx_mgr *mgr;
221 mgr = &fpriv->ctx_mgr;
223 mutex_lock(&mgr->lock);
224 ctx = idr_find(&mgr->ctx_handles, id);
226 kref_get(&ctx->refcount);
227 mutex_unlock(&mgr->lock);
231 int amdgpu_ctx_put(struct amdgpu_ctx *ctx)
236 kref_put(&ctx->refcount, amdgpu_ctx_do_release);
240 uint64_t amdgpu_ctx_add_fence(struct amdgpu_ctx *ctx, struct amdgpu_ring *ring,
243 struct amdgpu_ctx_ring *cring = & ctx->rings[ring->idx];
244 uint64_t seq = cring->sequence;
246 struct fence *other = NULL;
248 idx = seq & (amdgpu_sched_jobs - 1);
249 other = cring->fences[idx];
252 r = fence_wait_timeout(other, false, MAX_SCHEDULE_TIMEOUT);
254 DRM_ERROR("Error (%ld) waiting for fence!\n", r);
259 spin_lock(&ctx->ring_lock);
260 cring->fences[idx] = fence;
262 spin_unlock(&ctx->ring_lock);
269 struct fence *amdgpu_ctx_get_fence(struct amdgpu_ctx *ctx,
270 struct amdgpu_ring *ring, uint64_t seq)
272 struct amdgpu_ctx_ring *cring = & ctx->rings[ring->idx];
275 spin_lock(&ctx->ring_lock);
277 if (seq >= cring->sequence) {
278 spin_unlock(&ctx->ring_lock);
279 return ERR_PTR(-EINVAL);
283 if (seq + amdgpu_sched_jobs < cring->sequence) {
284 spin_unlock(&ctx->ring_lock);
288 fence = fence_get(cring->fences[seq & (amdgpu_sched_jobs - 1)]);
289 spin_unlock(&ctx->ring_lock);
294 void amdgpu_ctx_mgr_init(struct amdgpu_ctx_mgr *mgr)
296 mutex_init(&mgr->lock);
297 idr_init(&mgr->ctx_handles);
300 void amdgpu_ctx_mgr_fini(struct amdgpu_ctx_mgr *mgr)
302 struct amdgpu_ctx *ctx;
306 idp = &mgr->ctx_handles;
308 idr_for_each_entry(idp, ctx, id) {
309 if (kref_put(&ctx->refcount, amdgpu_ctx_do_release) != 1)
310 DRM_ERROR("ctx %p is still alive\n", ctx);
313 idr_destroy(&mgr->ctx_handles);
314 mutex_destroy(&mgr->lock);