2 * Copyright (C) 2017 Etnaviv Project
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 as published by
6 * the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program. If not, see <http://www.gnu.org/licenses/>.
17 #include <linux/kthread.h>
19 #include "etnaviv_drv.h"
20 #include "etnaviv_dump.h"
21 #include "etnaviv_gem.h"
22 #include "etnaviv_gpu.h"
23 #include "etnaviv_sched.h"
25 static int etnaviv_job_hang_limit = 0;
26 module_param_named(job_hang_limit, etnaviv_job_hang_limit, int , 0444);
27 static int etnaviv_hw_jobs_limit = 4;
28 module_param_named(hw_job_limit, etnaviv_hw_jobs_limit, int , 0444);
30 static struct dma_fence *
31 etnaviv_sched_dependency(struct drm_sched_job *sched_job,
32 struct drm_sched_entity *entity)
34 struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
35 struct dma_fence *fence;
38 if (unlikely(submit->in_fence)) {
39 fence = submit->in_fence;
40 submit->in_fence = NULL;
42 if (!dma_fence_is_signaled(fence))
48 for (i = 0; i < submit->nr_bos; i++) {
49 struct etnaviv_gem_submit_bo *bo = &submit->bos[i];
56 if (!dma_fence_is_signaled(fence))
62 for (j = 0; j < bo->nr_shared; j++) {
66 fence = bo->shared[j];
69 if (!dma_fence_is_signaled(fence))
82 static struct dma_fence *etnaviv_sched_run_job(struct drm_sched_job *sched_job)
84 struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
85 struct dma_fence *fence = NULL;
87 if (likely(!sched_job->s_fence->finished.error))
88 fence = etnaviv_gpu_submit(submit);
90 dev_dbg(submit->gpu->dev, "skipping bad job\n");
95 static void etnaviv_sched_timedout_job(struct drm_sched_job *sched_job)
97 struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
98 struct etnaviv_gpu *gpu = submit->gpu;
100 /* block scheduler */
101 kthread_park(gpu->sched.thread);
102 drm_sched_hw_job_reset(&gpu->sched, sched_job);
104 /* get the GPU back into the init state */
105 etnaviv_core_dump(gpu);
106 etnaviv_gpu_recover_hang(gpu);
108 /* restart scheduler after GPU is usable again */
109 drm_sched_job_recovery(&gpu->sched);
110 kthread_unpark(gpu->sched.thread);
113 static void etnaviv_sched_free_job(struct drm_sched_job *sched_job)
115 struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
117 etnaviv_submit_put(submit);
120 static const struct drm_sched_backend_ops etnaviv_sched_ops = {
121 .dependency = etnaviv_sched_dependency,
122 .run_job = etnaviv_sched_run_job,
123 .timedout_job = etnaviv_sched_timedout_job,
124 .free_job = etnaviv_sched_free_job,
127 int etnaviv_sched_push_job(struct drm_sched_entity *sched_entity,
128 struct etnaviv_gem_submit *submit)
132 ret = drm_sched_job_init(&submit->sched_job, &submit->gpu->sched,
133 sched_entity, submit->cmdbuf.ctx);
137 submit->out_fence = dma_fence_get(&submit->sched_job.s_fence->finished);
138 mutex_lock(&submit->gpu->fence_idr_lock);
139 submit->out_fence_id = idr_alloc_cyclic(&submit->gpu->fence_idr,
140 submit->out_fence, 0,
141 INT_MAX, GFP_KERNEL);
142 mutex_unlock(&submit->gpu->fence_idr_lock);
143 if (submit->out_fence_id < 0)
146 /* the scheduler holds on to the job now */
147 kref_get(&submit->refcount);
149 drm_sched_entity_push_job(&submit->sched_job, sched_entity);
154 int etnaviv_sched_init(struct etnaviv_gpu *gpu)
158 ret = drm_sched_init(&gpu->sched, &etnaviv_sched_ops,
159 etnaviv_hw_jobs_limit, etnaviv_job_hang_limit,
160 msecs_to_jiffies(500), dev_name(gpu->dev));
167 void etnaviv_sched_fini(struct etnaviv_gpu *gpu)
169 drm_sched_fini(&gpu->sched);