drivers/gpu/drm/amd/amdgpu/amdgpu_job.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 #include "amdgpu_trace.h"
  30
  31 int amdgpu_job_alloc(struct amdgpu_device *adev, unsigned num_ibs,
  32                      struct amdgpu_job **job)
  33 {
  34         size_t size = sizeof(struct amdgpu_job);
  35
  36         if (num_ibs == 0)
  37                 return -EINVAL;
  38
  39         size += sizeof(struct amdgpu_ib) * num_ibs;
  40
  41         *job = kzalloc(size, GFP_KERNEL);
  42         if (!*job)
  43                 return -ENOMEM;
  44
  45         (*job)->adev = adev;
  46         (*job)->ibs = (void *)&(*job)[1];
  47         (*job)->num_ibs = num_ibs;
  48
  49         amdgpu_sync_create(&(*job)->sync);
  50
  51         return 0;
  52 }
  53
  54 int amdgpu_job_alloc_with_ib(struct amdgpu_device *adev, unsigned size,
  55                              struct amdgpu_job **job)
  56 {
  57         int r;
  58
  59         r = amdgpu_job_alloc(adev, 1, job);
  60         if (r)
  61                 return r;
  62
  63         r = amdgpu_ib_get(adev, NULL, size, &(*job)->ibs[0]);
  64         if (r)
  65                 kfree(*job);
  66
  67         return r;
  68 }
  69
  70 void amdgpu_job_free(struct amdgpu_job *job)
  71 {
  72         unsigned i;
  73
  74         for (i = 0; i < job->num_ibs; ++i)
  75                 amdgpu_ib_free(job->adev, &job->ibs[i]);
  76
  77         amdgpu_bo_unref(&job->uf.bo);
  78         amdgpu_sync_free(&job->sync);
  79         kfree(job);
  80 }
  81
  82 int amdgpu_job_submit(struct amdgpu_job *job, struct amdgpu_ring *ring,
  83                       struct amd_sched_entity *entity, void *owner,
  84                       struct fence **f)
  85 {
  86         job->ring = ring;
  87         job->base.sched = &ring->sched;
  88         job->base.s_entity = entity;
  89         job->base.s_fence = amd_sched_fence_create(job->base.s_entity, owner);
  90         if (!job->base.s_fence)
  91                 return -ENOMEM;
  92
  93         *f = fence_get(&job->base.s_fence->base);
  94
  95         job->owner = owner;
  96         amd_sched_entity_push_job(&job->base);
  97
  98         return 0;
  99 }
 100
 101 static struct fence *amdgpu_job_dependency(struct amd_sched_job *sched_job)
 102 {
 103         struct amdgpu_job *job = to_amdgpu_job(sched_job);
 104         struct amdgpu_vm *vm = job->ibs->vm;
 105
 106         struct fence *fence = amdgpu_sync_get_fence(&job->sync);
 107
 108         if (fence == NULL && vm && !job->ibs->grabbed_vmid) {
 109                 struct amdgpu_ring *ring = job->ring;
 110                 int r;
 111
 112                 r = amdgpu_vm_grab_id(vm, ring, &job->sync,
 113                                       &job->base.s_fence->base);
 114                 if (r)
 115                         DRM_ERROR("Error getting VM ID (%d)\n", r);
 116                 else
 117                         job->ibs->grabbed_vmid = true;
 118
 119                 fence = amdgpu_sync_get_fence(&job->sync);
 120         }
 121
 122         return fence;
 123 }
 124
 125 static struct fence *amdgpu_job_run(struct amd_sched_job *sched_job)
 126 {
 127         struct fence *fence = NULL;
 128         struct amdgpu_job *job;
 129         int r;
 130
 131         if (!sched_job) {
 132                 DRM_ERROR("job is null\n");
 133                 return NULL;
 134         }
 135         job = to_amdgpu_job(sched_job);
 136
 137         r = amdgpu_sync_wait(&job->sync);
 138         if (r) {
 139                 DRM_ERROR("failed to sync wait (%d)\n", r);
 140                 return NULL;
 141         }
 142
 143         trace_amdgpu_sched_run_job(job);
 144         r = amdgpu_ib_schedule(job->ring, job->num_ibs, job->ibs, job->owner,
 145                                job->sync.last_vm_update, &fence);
 146         if (r) {
 147                 DRM_ERROR("Error scheduling IBs (%d)\n", r);
 148                 goto err;
 149         }
 150
 151 err:
 152         amdgpu_job_free(job);
 153         return fence;
 154 }
 155
 156 struct amd_sched_backend_ops amdgpu_sched_ops = {
 157         .dependency = amdgpu_job_dependency,
 158         .run_job = amdgpu_job_run,
 159 };