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 *job)
  31 {
  32         struct amdgpu_job *sched_job = (struct amdgpu_job *)job;
  33         return amdgpu_sync_get_fence(&sched_job->ibs->sync);
  34 }
  35
  36 static struct fence *amdgpu_sched_run_job(struct amd_sched_job *job)
  37 {
  38         struct amdgpu_job *sched_job;
  39         struct amdgpu_fence *fence;
  40         int r;
  41
  42         if (!job) {
  43                 DRM_ERROR("job is null\n");
  44                 return NULL;
  45         }
  46         sched_job = (struct amdgpu_job *)job;
  47         mutex_lock(&sched_job->job_lock);
  48         r = amdgpu_ib_schedule(sched_job->adev,
  49                                sched_job->num_ibs,
  50                                sched_job->ibs,
  51                                sched_job->base.owner);
  52         if (r)
  53                 goto err;
  54         fence = amdgpu_fence_ref(sched_job->ibs[sched_job->num_ibs - 1].fence);
  55
  56         if (sched_job->free_job)
  57                 sched_job->free_job(sched_job);
  58
  59         mutex_unlock(&sched_job->job_lock);
  60         return &fence->base;
  61
  62 err:
  63         DRM_ERROR("Run job error\n");
  64         mutex_unlock(&sched_job->job_lock);
  65         job->sched->ops->process_job(job);
  66         return NULL;
  67 }
  68
  69 static void amdgpu_sched_process_job(struct amd_sched_job *job)
  70 {
  71         struct amdgpu_job *sched_job;
  72
  73         if (!job) {
  74                 DRM_ERROR("job is null\n");
  75                 return;
  76         }
  77         sched_job = (struct amdgpu_job *)job;
  78         /* after processing job, free memory */
  79         fence_put(&sched_job->base.s_fence->base);
  80         kfree(sched_job);
  81 }
  82
  83 struct amd_sched_backend_ops amdgpu_sched_ops = {
  84         .dependency = amdgpu_sched_dependency,
  85         .run_job = amdgpu_sched_run_job,
  86         .process_job = amdgpu_sched_process_job
  87 };
  88
  89 int amdgpu_sched_ib_submit_kernel_helper(struct amdgpu_device *adev,
  90                                          struct amdgpu_ring *ring,
  91                                          struct amdgpu_ib *ibs,
  92                                          unsigned num_ibs,
  93                                          int (*free_job)(struct amdgpu_job *),
  94                                          void *owner,
  95                                          struct fence **f)
  96 {
  97         int r = 0;
  98         if (amdgpu_enable_scheduler) {
  99                 struct amdgpu_job *job =
 100                         kzalloc(sizeof(struct amdgpu_job), GFP_KERNEL);
 101                 if (!job)
 102                         return -ENOMEM;
 103                 job->base.sched = ring->scheduler;
 104                 job->base.s_entity = &adev->kernel_ctx.rings[ring->idx].entity;
 105                 job->adev = adev;
 106                 job->ibs = ibs;
 107                 job->num_ibs = num_ibs;
 108                 job->base.owner = owner;
 109                 mutex_init(&job->job_lock);
 110                 job->free_job = free_job;
 111                 mutex_lock(&job->job_lock);
 112                 r = amd_sched_entity_push_job((struct amd_sched_job *)job);
 113                 if (r) {
 114                         mutex_unlock(&job->job_lock);
 115                         kfree(job);
 116                         return r;
 117                 }
 118                 *f = fence_get(&job->base.s_fence->base);
 119                 mutex_unlock(&job->job_lock);
 120         } else {
 121                 r = amdgpu_ib_schedule(adev, num_ibs, ibs, owner);
 122                 if (r)
 123                         return r;
 124                 *f = fence_get(&ibs[num_ibs - 1].fence->base);
 125         }
 126
 127         return 0;
 128 }