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);
68 static void amdgpu_ctx_fini(struct amdgpu_ctx *ctx)
70 struct amdgpu_device *adev = ctx->adev;
76 for (i = 0; i < AMDGPU_MAX_RINGS; ++i)
77 for (j = 0; j < amdgpu_sched_jobs; ++j)
78 fence_put(ctx->rings[i].fences[j]);
81 for (i = 0; i < adev->num_rings; i++)
82 amd_sched_entity_fini(&adev->rings[i]->sched,
83 &ctx->rings[i].entity);
86 static int amdgpu_ctx_alloc(struct amdgpu_device *adev,
87 struct amdgpu_fpriv *fpriv,
90 struct amdgpu_ctx_mgr *mgr = &fpriv->ctx_mgr;
91 struct amdgpu_ctx *ctx;
94 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
98 mutex_lock(&mgr->lock);
99 r = idr_alloc(&mgr->ctx_handles, ctx, 1, 0, GFP_KERNEL);
101 mutex_unlock(&mgr->lock);
106 r = amdgpu_ctx_init(adev, ctx);
108 idr_remove(&mgr->ctx_handles, *id);
112 mutex_unlock(&mgr->lock);
116 static void amdgpu_ctx_do_release(struct kref *ref)
118 struct amdgpu_ctx *ctx;
120 ctx = container_of(ref, struct amdgpu_ctx, refcount);
122 amdgpu_ctx_fini(ctx);
127 static int amdgpu_ctx_free(struct amdgpu_fpriv *fpriv, uint32_t id)
129 struct amdgpu_ctx_mgr *mgr = &fpriv->ctx_mgr;
130 struct amdgpu_ctx *ctx;
132 mutex_lock(&mgr->lock);
133 ctx = idr_find(&mgr->ctx_handles, id);
135 idr_remove(&mgr->ctx_handles, id);
136 kref_put(&ctx->refcount, amdgpu_ctx_do_release);
137 mutex_unlock(&mgr->lock);
140 mutex_unlock(&mgr->lock);
144 static int amdgpu_ctx_query(struct amdgpu_device *adev,
145 struct amdgpu_fpriv *fpriv, uint32_t id,
146 union drm_amdgpu_ctx_out *out)
148 struct amdgpu_ctx *ctx;
149 struct amdgpu_ctx_mgr *mgr;
150 unsigned reset_counter;
155 mgr = &fpriv->ctx_mgr;
156 mutex_lock(&mgr->lock);
157 ctx = idr_find(&mgr->ctx_handles, id);
159 mutex_unlock(&mgr->lock);
163 /* TODO: these two are always zero */
164 out->state.flags = 0x0;
165 out->state.hangs = 0x0;
167 /* determine if a GPU reset has occured since the last call */
168 reset_counter = atomic_read(&adev->gpu_reset_counter);
169 /* TODO: this should ideally return NO, GUILTY, or INNOCENT. */
170 if (ctx->reset_counter == reset_counter)
171 out->state.reset_status = AMDGPU_CTX_NO_RESET;
173 out->state.reset_status = AMDGPU_CTX_UNKNOWN_RESET;
174 ctx->reset_counter = reset_counter;
176 mutex_unlock(&mgr->lock);
180 int amdgpu_ctx_ioctl(struct drm_device *dev, void *data,
181 struct drm_file *filp)
186 union drm_amdgpu_ctx *args = data;
187 struct amdgpu_device *adev = dev->dev_private;
188 struct amdgpu_fpriv *fpriv = filp->driver_priv;
191 id = args->in.ctx_id;
193 switch (args->in.op) {
194 case AMDGPU_CTX_OP_ALLOC_CTX:
195 r = amdgpu_ctx_alloc(adev, fpriv, &id);
196 args->out.alloc.ctx_id = id;
198 case AMDGPU_CTX_OP_FREE_CTX:
199 r = amdgpu_ctx_free(fpriv, id);
201 case AMDGPU_CTX_OP_QUERY_STATE:
202 r = amdgpu_ctx_query(adev, fpriv, id, &args->out);
211 struct amdgpu_ctx *amdgpu_ctx_get(struct amdgpu_fpriv *fpriv, uint32_t id)
213 struct amdgpu_ctx *ctx;
214 struct amdgpu_ctx_mgr *mgr;
219 mgr = &fpriv->ctx_mgr;
221 mutex_lock(&mgr->lock);
222 ctx = idr_find(&mgr->ctx_handles, id);
224 kref_get(&ctx->refcount);
225 mutex_unlock(&mgr->lock);
229 int amdgpu_ctx_put(struct amdgpu_ctx *ctx)
234 kref_put(&ctx->refcount, amdgpu_ctx_do_release);
238 uint64_t amdgpu_ctx_add_fence(struct amdgpu_ctx *ctx, struct amdgpu_ring *ring,
241 struct amdgpu_ctx_ring *cring = & ctx->rings[ring->idx];
242 uint64_t seq = cring->sequence;
244 struct fence *other = NULL;
246 idx = seq & (amdgpu_sched_jobs - 1);
247 other = cring->fences[idx];
250 r = fence_wait_timeout(other, false, MAX_SCHEDULE_TIMEOUT);
252 DRM_ERROR("Error (%ld) waiting for fence!\n", r);
257 spin_lock(&ctx->ring_lock);
258 cring->fences[idx] = fence;
260 spin_unlock(&ctx->ring_lock);
267 struct fence *amdgpu_ctx_get_fence(struct amdgpu_ctx *ctx,
268 struct amdgpu_ring *ring, uint64_t seq)
270 struct amdgpu_ctx_ring *cring = & ctx->rings[ring->idx];
273 spin_lock(&ctx->ring_lock);
275 if (seq >= cring->sequence) {
276 spin_unlock(&ctx->ring_lock);
277 return ERR_PTR(-EINVAL);
281 if (seq + amdgpu_sched_jobs < cring->sequence) {
282 spin_unlock(&ctx->ring_lock);
286 fence = fence_get(cring->fences[seq & (amdgpu_sched_jobs - 1)]);
287 spin_unlock(&ctx->ring_lock);
292 void amdgpu_ctx_mgr_init(struct amdgpu_ctx_mgr *mgr)
294 mutex_init(&mgr->lock);
295 idr_init(&mgr->ctx_handles);
298 void amdgpu_ctx_mgr_fini(struct amdgpu_ctx_mgr *mgr)
300 struct amdgpu_ctx *ctx;
304 idp = &mgr->ctx_handles;
306 idr_for_each_entry(idp, ctx, id) {
307 if (kref_put(&ctx->refcount, amdgpu_ctx_do_release) != 1)
308 DRM_ERROR("ctx %p is still alive\n", ctx);
311 idr_destroy(&mgr->ctx_handles);
312 mutex_destroy(&mgr->lock);