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_run_job(struct amd_sched_job *job)
  31 {
  32         struct amdgpu_job *sched_job;
  33         struct amdgpu_fence *fence;
  34         int r;
  35
  36         if (!job) {
  37                 DRM_ERROR("job is null\n");
  38                 return NULL;
  39         }
  40         sched_job = (struct amdgpu_job *)job;
  41         mutex_lock(&sched_job->job_lock);
  42         r = amdgpu_ib_schedule(sched_job->adev,
  43                                sched_job->num_ibs,
  44                                sched_job->ibs,
  45                                sched_job->base.owner);
  46         if (r)
  47                 goto err;
  48         fence = amdgpu_fence_ref(sched_job->ibs[sched_job->num_ibs - 1].fence);
  49
  50         if (sched_job->free_job)
  51                 sched_job->free_job(sched_job);
  52
  53         mutex_unlock(&sched_job->job_lock);
  54         return &fence->base;
  55
  56 err:
  57         DRM_ERROR("Run job error\n");
  58         mutex_unlock(&sched_job->job_lock);
  59         job->sched->ops->process_job(job);
  60         return NULL;
  61 }
  62
  63 static void amdgpu_sched_process_job(struct amd_sched_job *job)
  64 {
  65         struct amdgpu_job *sched_job;
  66
  67         if (!job) {
  68                 DRM_ERROR("job is null\n");
  69                 return;
  70         }
  71         sched_job = (struct amdgpu_job *)job;
  72         /* after processing job, free memory */
  73         fence_put(&sched_job->base.s_fence->base);
  74         kfree(sched_job);
  75 }
  76
  77 struct amd_sched_backend_ops amdgpu_sched_ops = {
  78         .run_job = amdgpu_sched_run_job,
  79         .process_job = amdgpu_sched_process_job
  80 };
  81
  82 int amdgpu_sched_ib_submit_kernel_helper(struct amdgpu_device *adev,
  83                                          struct amdgpu_ring *ring,
  84                                          struct amdgpu_ib *ibs,
  85                                          unsigned num_ibs,
  86                                          int (*free_job)(struct amdgpu_job *),
  87                                          void *owner,
  88                                          struct fence **f)
  89 {
  90         int r = 0;
  91         if (amdgpu_enable_scheduler) {
  92                 struct amdgpu_job *job =
  93                         kzalloc(sizeof(struct amdgpu_job), GFP_KERNEL);
  94                 if (!job)
  95                         return -ENOMEM;
  96                 job->base.sched = ring->scheduler;
  97                 job->base.s_entity = &adev->kernel_ctx.rings[ring->idx].entity;
  98                 job->adev = adev;
  99                 job->ibs = ibs;
 100                 job->num_ibs = num_ibs;
 101                 job->base.owner = owner;
 102                 mutex_init(&job->job_lock);
 103                 job->free_job = free_job;
 104                 mutex_lock(&job->job_lock);
 105                 r = amd_sched_entity_push_job((struct amd_sched_job *)job);
 106                 if (r) {
 107                         mutex_unlock(&job->job_lock);
 108                         kfree(job);
 109                         return r;
 110                 }
 111                 *f = fence_get(&job->base.s_fence->base);
 112                 mutex_unlock(&job->job_lock);
 113         } else {
 114                 r = amdgpu_ib_schedule(adev, num_ibs, ibs, owner);
 115                 if (r)
 116                         return r;
 117                 *f = fence_get(&ibs[num_ibs - 1].fence->base);
 118         }
 119
 120         return 0;
 121 }