drivers/gpu/drm/amd/amdgpu/amdgpu_sched.c

   1 /*
   2  * Copyright 2017 Valve Corporation
   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  * Authors: Andres Rodriguez <andresx7@gmail.com>
  23  */
  24
  25 #include <linux/fdtable.h>
  26 #include <linux/file.h>
  27 #include <linux/pid.h>
  28
  29 #include <drm/amdgpu_drm.h>
  30
  31 #include "amdgpu.h"
  32
  33 #include "amdgpu_vm.h"
  34
  35 enum drm_sched_priority amdgpu_to_sched_priority(int amdgpu_priority)
  36 {
  37         switch (amdgpu_priority) {
  38         case AMDGPU_CTX_PRIORITY_VERY_HIGH:
  39                 return DRM_SCHED_PRIORITY_HIGH_HW;
  40         case AMDGPU_CTX_PRIORITY_HIGH:
  41                 return DRM_SCHED_PRIORITY_HIGH_SW;
  42         case AMDGPU_CTX_PRIORITY_NORMAL:
  43                 return DRM_SCHED_PRIORITY_NORMAL;
  44         case AMDGPU_CTX_PRIORITY_LOW:
  45         case AMDGPU_CTX_PRIORITY_VERY_LOW:
  46                 return DRM_SCHED_PRIORITY_LOW;
  47         case AMDGPU_CTX_PRIORITY_UNSET:
  48                 return DRM_SCHED_PRIORITY_UNSET;
  49         default:
  50                 WARN(1, "Invalid context priority %d\n", amdgpu_priority);
  51                 return DRM_SCHED_PRIORITY_INVALID;
  52         }
  53 }
  54
  55 static int amdgpu_sched_process_priority_override(struct amdgpu_device *adev,
  56                                                   int fd,
  57                                                   enum drm_sched_priority priority)
  58 {
  59         struct fd f = fdget(fd);
  60         struct amdgpu_fpriv *fpriv;
  61         struct amdgpu_ctx *ctx;
  62         uint32_t id;
  63         int r;
  64
  65         if (!f.file)
  66                 return -EINVAL;
  67
  68         r = amdgpu_file_to_fpriv(f.file, &fpriv);
  69         if (r) {
  70                 fdput(f);
  71                 return r;
  72         }
  73
  74         idr_for_each_entry(&fpriv->ctx_mgr.ctx_handles, ctx, id)
  75                 amdgpu_ctx_priority_override(ctx, priority);
  76
  77         fdput(f);
  78         return 0;
  79 }
  80
  81 static int amdgpu_sched_context_priority_override(struct amdgpu_device *adev,
  82                                                   int fd,
  83                                                   unsigned ctx_id,
  84                                                   enum drm_sched_priority priority)
  85 {
  86         struct fd f = fdget(fd);
  87         struct amdgpu_fpriv *fpriv;
  88         struct amdgpu_ctx *ctx;
  89         int r;
  90
  91         if (!f.file)
  92                 return -EINVAL;
  93
  94         r = amdgpu_file_to_fpriv(f.file, &fpriv);
  95         if (r) {
  96                 fdput(f);
  97                 return r;
  98         }
  99
 100         ctx = amdgpu_ctx_get(fpriv, ctx_id);
 101
 102         if (!ctx) {
 103                 fdput(f);
 104                 return -EINVAL;
 105         }
 106
 107         amdgpu_ctx_priority_override(ctx, priority);
 108         amdgpu_ctx_put(ctx);
 109         fdput(f);
 110
 111         return 0;
 112 }
 113
 114 int amdgpu_sched_ioctl(struct drm_device *dev, void *data,
 115                        struct drm_file *filp)
 116 {
 117         union drm_amdgpu_sched *args = data;
 118         struct amdgpu_device *adev = dev->dev_private;
 119         enum drm_sched_priority priority;
 120         int r;
 121
 122         priority = amdgpu_to_sched_priority(args->in.priority);
 123         if (priority == DRM_SCHED_PRIORITY_INVALID)
 124                 return -EINVAL;
 125
 126         switch (args->in.op) {
 127         case AMDGPU_SCHED_OP_PROCESS_PRIORITY_OVERRIDE:
 128                 r = amdgpu_sched_process_priority_override(adev,
 129                                                            args->in.fd,
 130                                                            priority);
 131                 break;
 132         case AMDGPU_SCHED_OP_CONTEXT_PRIORITY_OVERRIDE:
 133                 r = amdgpu_sched_context_priority_override(adev,
 134                                                            args->in.fd,
 135                                                            args->in.ctx_id,
 136                                                            priority);
 137                 break;
 138         default:
 139                 DRM_ERROR("Invalid sched op specified: %d\n", args->in.op);
 140                 r = -EINVAL;
 141                 break;
 142         }
 143
 144         return r;
 145 }