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  *
23  */
24 #include <linux/kthread.h>
25 #include <linux/wait.h>
26 #include <linux/sched.h>
27 
28 #include <drm/drm_drv.h>
29 
30 #include "amdgpu.h"
31 #include "amdgpu_trace.h"
32 
33 static enum drm_gpu_sched_stat amdgpu_job_timedout(struct drm_sched_job *s_job)
34 {
35 	struct amdgpu_ring *ring = to_amdgpu_ring(s_job->sched);
36 	struct amdgpu_job *job = to_amdgpu_job(s_job);
37 	struct amdgpu_task_info ti;
38 	struct amdgpu_device *adev = ring->adev;
39 	int idx;
40 
41 	if (!drm_dev_enter(adev_to_drm(adev), &idx)) {
42 		DRM_INFO("%s - device unplugged skipping recovery on scheduler:%s",
43 			 __func__, s_job->sched->name);
44 
45 		/* Effectively the job is aborted as the device is gone */
46 		return DRM_GPU_SCHED_STAT_ENODEV;
47 	}
48 
49 	memset(&ti, 0, sizeof(struct amdgpu_task_info));
50 
51 	if (amdgpu_gpu_recovery &&
52 	    amdgpu_ring_soft_recovery(ring, job->vmid, s_job->s_fence->parent)) {
53 		DRM_ERROR("ring %s timeout, but soft recovered\n",
54 			  s_job->sched->name);
55 		goto exit;
56 	}
57 
58 	amdgpu_vm_get_task_info(ring->adev, job->pasid, &ti);
59 	DRM_ERROR("ring %s timeout, signaled seq=%u, emitted seq=%u\n",
60 		  job->base.sched->name, atomic_read(&ring->fence_drv.last_seq),
61 		  ring->fence_drv.sync_seq);
62 	DRM_ERROR("Process information: process %s pid %d thread %s pid %d\n",
63 		  ti.process_name, ti.tgid, ti.task_name, ti.pid);
64 
65 	if (amdgpu_device_should_recover_gpu(ring->adev)) {
66 		amdgpu_device_gpu_recover(ring->adev, job);
67 	} else {
68 		drm_sched_suspend_timeout(&ring->sched);
69 		if (amdgpu_sriov_vf(adev))
70 			adev->virt.tdr_debug = true;
71 	}
72 
73 exit:
74 	drm_dev_exit(idx);
75 	return DRM_GPU_SCHED_STAT_NOMINAL;
76 }
77 
78 int amdgpu_job_alloc(struct amdgpu_device *adev, unsigned num_ibs,
79 		     struct amdgpu_job **job, struct amdgpu_vm *vm)
80 {
81 	size_t size = sizeof(struct amdgpu_job);
82 
83 	if (num_ibs == 0)
84 		return -EINVAL;
85 
86 	size += sizeof(struct amdgpu_ib) * num_ibs;
87 
88 	*job = kzalloc(size, GFP_KERNEL);
89 	if (!*job)
90 		return -ENOMEM;
91 
92 	/*
93 	 * Initialize the scheduler to at least some ring so that we always
94 	 * have a pointer to adev.
95 	 */
96 	(*job)->base.sched = &adev->rings[0]->sched;
97 	(*job)->vm = vm;
98 	(*job)->ibs = (void *)&(*job)[1];
99 	(*job)->num_ibs = num_ibs;
100 
101 	amdgpu_sync_create(&(*job)->sync);
102 	amdgpu_sync_create(&(*job)->sched_sync);
103 	(*job)->vram_lost_counter = atomic_read(&adev->vram_lost_counter);
104 	(*job)->vm_pd_addr = AMDGPU_BO_INVALID_OFFSET;
105 
106 	return 0;
107 }
108 
109 int amdgpu_job_alloc_with_ib(struct amdgpu_device *adev, unsigned size,
110 		enum amdgpu_ib_pool_type pool_type,
111 		struct amdgpu_job **job)
112 {
113 	int r;
114 
115 	r = amdgpu_job_alloc(adev, 1, job, NULL);
116 	if (r)
117 		return r;
118 
119 	r = amdgpu_ib_get(adev, NULL, size, pool_type, &(*job)->ibs[0]);
120 	if (r)
121 		kfree(*job);
122 
123 	return r;
124 }
125 
126 void amdgpu_job_free_resources(struct amdgpu_job *job)
127 {
128 	struct amdgpu_ring *ring = to_amdgpu_ring(job->base.sched);
129 	struct dma_fence *f;
130 	struct dma_fence *hw_fence;
131 	unsigned i;
132 
133 	if (job->hw_fence.ops == NULL)
134 		hw_fence = job->external_hw_fence;
135 	else
136 		hw_fence = &job->hw_fence;
137 
138 	/* use sched fence if available */
139 	f = job->base.s_fence ? &job->base.s_fence->finished : hw_fence;
140 	for (i = 0; i < job->num_ibs; ++i)
141 		amdgpu_ib_free(ring->adev, &job->ibs[i], f);
142 }
143 
144 static void amdgpu_job_free_cb(struct drm_sched_job *s_job)
145 {
146 	struct amdgpu_job *job = to_amdgpu_job(s_job);
147 
148 	drm_sched_job_cleanup(s_job);
149 
150 	amdgpu_sync_free(&job->sync);
151 	amdgpu_sync_free(&job->sched_sync);
152 
153     /* only put the hw fence if has embedded fence */
154 	if (job->hw_fence.ops != NULL)
155 		dma_fence_put(&job->hw_fence);
156 	else
157 		kfree(job);
158 }
159 
160 void amdgpu_job_free(struct amdgpu_job *job)
161 {
162 	amdgpu_job_free_resources(job);
163 	amdgpu_sync_free(&job->sync);
164 	amdgpu_sync_free(&job->sched_sync);
165 
166 	/* only put the hw fence if has embedded fence */
167 	if (job->hw_fence.ops != NULL)
168 		dma_fence_put(&job->hw_fence);
169 	else
170 		kfree(job);
171 }
172 
173 int amdgpu_job_submit(struct amdgpu_job *job, struct drm_sched_entity *entity,
174 		      void *owner, struct dma_fence **f)
175 {
176 	int r;
177 
178 	if (!f)
179 		return -EINVAL;
180 
181 	r = drm_sched_job_init(&job->base, entity, owner);
182 	if (r)
183 		return r;
184 
185 	drm_sched_job_arm(&job->base);
186 
187 	*f = dma_fence_get(&job->base.s_fence->finished);
188 	amdgpu_job_free_resources(job);
189 	drm_sched_entity_push_job(&job->base);
190 
191 	return 0;
192 }
193 
194 int amdgpu_job_submit_direct(struct amdgpu_job *job, struct amdgpu_ring *ring,
195 			     struct dma_fence **fence)
196 {
197 	int r;
198 
199 	job->base.sched = &ring->sched;
200 	r = amdgpu_ib_schedule(ring, job->num_ibs, job->ibs, NULL, fence);
201 	/* record external_hw_fence for direct submit */
202 	job->external_hw_fence = dma_fence_get(*fence);
203 	if (r)
204 		return r;
205 
206 	amdgpu_job_free(job);
207 	dma_fence_put(*fence);
208 
209 	return 0;
210 }
211 
212 static struct dma_fence *amdgpu_job_dependency(struct drm_sched_job *sched_job,
213 					       struct drm_sched_entity *s_entity)
214 {
215 	struct amdgpu_ring *ring = to_amdgpu_ring(s_entity->rq->sched);
216 	struct amdgpu_job *job = to_amdgpu_job(sched_job);
217 	struct amdgpu_vm *vm = job->vm;
218 	struct dma_fence *fence;
219 	int r;
220 
221 	fence = amdgpu_sync_get_fence(&job->sync);
222 	if (fence && drm_sched_dependency_optimized(fence, s_entity)) {
223 		r = amdgpu_sync_fence(&job->sched_sync, fence);
224 		if (r)
225 			DRM_ERROR("Error adding fence (%d)\n", r);
226 	}
227 
228 	while (fence == NULL && vm && !job->vmid) {
229 		r = amdgpu_vmid_grab(vm, ring, &job->sync,
230 				     &job->base.s_fence->finished,
231 				     job);
232 		if (r)
233 			DRM_ERROR("Error getting VM ID (%d)\n", r);
234 
235 		fence = amdgpu_sync_get_fence(&job->sync);
236 	}
237 
238 	return fence;
239 }
240 
241 static struct dma_fence *amdgpu_job_run(struct drm_sched_job *sched_job)
242 {
243 	struct amdgpu_ring *ring = to_amdgpu_ring(sched_job->sched);
244 	struct dma_fence *fence = NULL, *finished;
245 	struct amdgpu_job *job;
246 	int r = 0;
247 
248 	job = to_amdgpu_job(sched_job);
249 	finished = &job->base.s_fence->finished;
250 
251 	BUG_ON(amdgpu_sync_peek_fence(&job->sync, NULL));
252 
253 	trace_amdgpu_sched_run_job(job);
254 
255 	if (job->vram_lost_counter != atomic_read(&ring->adev->vram_lost_counter))
256 		dma_fence_set_error(finished, -ECANCELED);/* skip IB as well if VRAM lost */
257 
258 	if (finished->error < 0) {
259 		DRM_INFO("Skip scheduling IBs!\n");
260 	} else {
261 		r = amdgpu_ib_schedule(ring, job->num_ibs, job->ibs, job,
262 				       &fence);
263 		if (r)
264 			DRM_ERROR("Error scheduling IBs (%d)\n", r);
265 	}
266 
267 	if (!job->job_run_counter)
268 		dma_fence_get(fence);
269 	else if (finished->error < 0)
270 		dma_fence_put(&job->hw_fence);
271 	job->job_run_counter++;
272 	amdgpu_job_free_resources(job);
273 
274 	fence = r ? ERR_PTR(r) : fence;
275 	return fence;
276 }
277 
278 #define to_drm_sched_job(sched_job)		\
279 		container_of((sched_job), struct drm_sched_job, queue_node)
280 
281 void amdgpu_job_stop_all_jobs_on_sched(struct drm_gpu_scheduler *sched)
282 {
283 	struct drm_sched_job *s_job;
284 	struct drm_sched_entity *s_entity = NULL;
285 	int i;
286 
287 	/* Signal all jobs not yet scheduled */
288 	for (i = DRM_SCHED_PRIORITY_COUNT - 1; i >= DRM_SCHED_PRIORITY_MIN; i--) {
289 		struct drm_sched_rq *rq = &sched->sched_rq[i];
290 
291 		if (!rq)
292 			continue;
293 
294 		spin_lock(&rq->lock);
295 		list_for_each_entry(s_entity, &rq->entities, list) {
296 			while ((s_job = to_drm_sched_job(spsc_queue_pop(&s_entity->job_queue)))) {
297 				struct drm_sched_fence *s_fence = s_job->s_fence;
298 
299 				dma_fence_signal(&s_fence->scheduled);
300 				dma_fence_set_error(&s_fence->finished, -EHWPOISON);
301 				dma_fence_signal(&s_fence->finished);
302 			}
303 		}
304 		spin_unlock(&rq->lock);
305 	}
306 
307 	/* Signal all jobs already scheduled to HW */
308 	list_for_each_entry(s_job, &sched->pending_list, list) {
309 		struct drm_sched_fence *s_fence = s_job->s_fence;
310 
311 		dma_fence_set_error(&s_fence->finished, -EHWPOISON);
312 		dma_fence_signal(&s_fence->finished);
313 	}
314 }
315 
316 const struct drm_sched_backend_ops amdgpu_sched_ops = {
317 	.dependency = amdgpu_job_dependency,
318 	.run_job = amdgpu_job_run,
319 	.timedout_job = amdgpu_job_timedout,
320 	.free_job = amdgpu_job_free_cb
321 };
322