LXR linux/drivers/gpu/drm/amd/amdgpu/amdgpu

   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
  30static 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
  36static 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
  59err:
  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
  69struct amd_sched_backend_ops amdgpu_sched_ops = {
  70        .dependency = amdgpu_sched_dependency,
  71        .run_job = amdgpu_sched_run_job,
  72};
  73
  74int 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}
 114