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 struct fence *amdgpu_sched_dependency(struct amd_sched_job *sched_job)
  31 {
  32         struct amdgpu_job *job = to_amdgpu_job(sched_job);
  33         return amdgpu_sync_get_fence(&job->ibs->sync);
  34 }
  35
  36 static struct fence *amdgpu_sched_run_job(struct amd_sched_job *sched_job)
  37 {
  38         struct amdgpu_fence *fence = NULL;
  39         struct amdgpu_job *job;
  40         int r;
  41
  42         if (!sched_job) {
  43                 DRM_ERROR("job is null\n");
  44                 return NULL;
  45         }
  46         job = to_amdgpu_job(sched_job);
  47         mutex_lock(&job->job_lock);
  48         r = amdgpu_ib_schedule(job->adev,
  49                                job->num_ibs,
  50                                job->ibs,
  51                                job->base.owner);
  52         if (r) {
  53                 DRM_ERROR("Error scheduling IBs (%d)\n", r);
  54                 goto err;
  55         }
  56
  57         fence = amdgpu_fence_ref(job->ibs[job->num_ibs - 1].fence);
  58
  59 err:
  60         if (job->free_job)
  61                 job->free_job(job);
  62
  63         mutex_unlock(&job->job_lock);
  64         fence_put(&job->base.s_fence->base);
  65         kfree(job);
  66         return fence ? &fence->base : NULL;
  67 }
  68
  69 struct amd_sched_backend_ops amdgpu_sched_ops = {
  70         .dependency = amdgpu_sched_dependency,
  71         .run_job = amdgpu_sched_run_job,
  72 };
  73
  74 int amdgpu_sched_ib_submit_kernel_helper(struct amdgpu_device *adev,
  75                                          struct amdgpu_ring *ring,
  76                                          struct amdgpu_ib *ibs,
  77                                          unsigned num_ibs,
  78                                          int (*free_job)(struct amdgpu_job *),
  79                                          void *owner,
  80                                          struct fence **f)
  81 {
  82         int r = 0;
  83         if (amdgpu_enable_scheduler) {
  84                 struct amdgpu_job *job =
  85                         kzalloc(sizeof(struct amdgpu_job), GFP_KERNEL);
  86                 if (!job)
  87                         return -ENOMEM;
  88                 job->base.sched = &ring->sched;
  89                 job->base.s_entity = &adev->kernel_ctx.rings[ring->idx].entity;
  90                 job->adev = adev;
  91                 job->ibs = ibs;
  92                 job->num_ibs = num_ibs;
  93                 job->base.owner = owner;
  94                 mutex_init(&job->job_lock);
  95                 job->free_job = free_job;
  96                 mutex_lock(&job->job_lock);
  97                 r = amd_sched_entity_push_job(&job->base);
  98                 if (r) {
  99                         mutex_unlock(&job->job_lock);
 100                         kfree(job);
 101                         return r;
 102                 }
 103                 *f = fence_get(&job->base.s_fence->base);
 104                 mutex_unlock(&job->job_lock);
 105         } else {
 106                 r = amdgpu_ib_schedule(adev, num_ibs, ibs, owner);
 107                 if (r)
 108                         return r;
 109                 *f = fence_get(&ibs[num_ibs - 1].fence->base);
 110         }
 111
 112         return 0;
 113 }