drivers/gpu/drm/amd/amdgpu/amdgpu_sched.c

   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 #include <drm/drmP.h>
  28 #include "amdgpu.h"
  29
  30 static int amdgpu_sched_prepare_job(struct amd_gpu_scheduler *sched,
  31                                     struct amd_context_entity *c_entity,
  32                                     void *job)
  33 {
  34         int r = 0;
  35         struct amdgpu_cs_parser *sched_job = (struct amdgpu_cs_parser *)job;
  36         if (sched_job->prepare_job)
  37                 r = sched_job->prepare_job(sched_job);
  38         if (r) {
  39                 DRM_ERROR("Prepare job error\n");
  40                 schedule_work(&sched_job->job_work);
  41         }
  42         return r;
  43 }
  44
  45 static void amdgpu_sched_run_job(struct amd_gpu_scheduler *sched,
  46                                  struct amd_context_entity *c_entity,
  47                                  void *job)
  48 {
  49         int r = 0;
  50         struct amdgpu_cs_parser *sched_job = (struct amdgpu_cs_parser *)job;
  51
  52         mutex_lock(&sched_job->job_lock);
  53         r = amdgpu_ib_schedule(sched_job->adev,
  54                                sched_job->num_ibs,
  55                                sched_job->ibs,
  56                                sched_job->filp);
  57         if (r)
  58                 goto err;
  59         if (sched_job->run_job) {
  60                 r = sched_job->run_job(sched_job);
  61                 if (r)
  62                         goto err;
  63         }
  64         atomic64_set(&c_entity->last_emitted_v_seq,
  65                      sched_job->ibs[sched_job->num_ibs - 1].sequence);
  66         wake_up_all(&c_entity->wait_emit);
  67
  68         mutex_unlock(&sched_job->job_lock);
  69         return;
  70 err:
  71         DRM_ERROR("Run job error\n");
  72         mutex_unlock(&sched_job->job_lock);
  73         schedule_work(&sched_job->job_work);
  74 }
  75
  76 static void amdgpu_sched_process_job(struct amd_gpu_scheduler *sched, void *job)
  77 {
  78         struct amdgpu_cs_parser *sched_job = NULL;
  79         struct amdgpu_fence *fence = NULL;
  80         struct amdgpu_ring *ring = NULL;
  81         struct amdgpu_device *adev = NULL;
  82         struct amd_context_entity *c_entity = NULL;
  83
  84         if (!job)
  85                 return;
  86         sched_job = (struct amdgpu_cs_parser *)job;
  87         fence = sched_job->ibs[sched_job->num_ibs - 1].fence;
  88         if (!fence)
  89                 return;
  90         ring = fence->ring;
  91         adev = ring->adev;
  92
  93         /* wake up users waiting for time stamp */
  94         wake_up_all(&c_entity->wait_queue);
  95
  96         schedule_work(&sched_job->job_work);
  97 }
  98
  99 struct amd_sched_backend_ops amdgpu_sched_ops = {
 100         .prepare_job = amdgpu_sched_prepare_job,
 101         .run_job = amdgpu_sched_run_job,
 102         .process_job = amdgpu_sched_process_job
 103 };
 104
 105 int amdgpu_sched_ib_submit_kernel_helper(struct amdgpu_device *adev,
 106                                          struct amdgpu_ring *ring,
 107                                          struct amdgpu_ib *ibs,
 108                                          unsigned num_ibs,
 109                                          int (*free_job)(struct amdgpu_cs_parser *),
 110                                          void *owner,
 111                                          struct fence **f)
 112 {
 113         int r = 0;
 114         if (amdgpu_enable_scheduler) {
 115                 uint64_t v_seq;
 116                 struct amdgpu_cs_parser *sched_job =
 117                         amdgpu_cs_parser_create(adev,
 118                                                 owner,
 119                                                 adev->kernel_ctx,
 120                                                 ibs, 1);
 121                 if(!sched_job) {
 122                         return -ENOMEM;
 123                 }
 124                 sched_job->free_job = free_job;
 125                 v_seq = atomic64_inc_return(&adev->kernel_ctx->rings[ring->idx].c_entity.last_queued_v_seq);
 126                 ibs[num_ibs - 1].sequence = v_seq;
 127                 amd_sched_push_job(ring->scheduler,
 128                                    &adev->kernel_ctx->rings[ring->idx].c_entity,
 129                                    sched_job);
 130                 r = amd_sched_wait_emit(
 131                         &adev->kernel_ctx->rings[ring->idx].c_entity,
 132                         v_seq,
 133                         false,
 134                         -1);
 135                 if (r)
 136                         WARN(true, "emit timeout\n");
 137         } else
 138                 r = amdgpu_ib_schedule(adev, 1, ibs, owner);
 139         if (r)
 140                 return r;
 141         *f = &ibs[num_ibs - 1].fence->base;
 142         return 0;
 143 }