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 #include "amdgpu_sched.h"
  33 #include "amdgpu_vm.h"
  34
  35 static int amdgpu_sched_process_priority_override(struct amdgpu_device *adev,
  36                                                   int fd,
  37                                                   int32_t priority)
  38 {
  39         struct fd f = fdget(fd);
  40         struct amdgpu_fpriv *fpriv;
  41         struct amdgpu_ctx *ctx;
  42         uint32_t id;
  43         int r;
  44
  45         if (!f.file)
  46                 return -EINVAL;
  47
  48         r = amdgpu_file_to_fpriv(f.file, &fpriv);
  49         if (r) {
  50                 fdput(f);
  51                 return r;
  52         }
  53
  54         idr_for_each_entry(&fpriv->ctx_mgr.ctx_handles, ctx, id)
  55                 amdgpu_ctx_priority_override(ctx, priority);
  56
  57         fdput(f);
  58         return 0;
  59 }
  60
  61 static int amdgpu_sched_context_priority_override(struct amdgpu_device *adev,
  62                                                   int fd,
  63                                                   unsigned ctx_id,
  64                                                   int32_t priority)
  65 {
  66         struct fd f = fdget(fd);
  67         struct amdgpu_fpriv *fpriv;
  68         struct amdgpu_ctx *ctx;
  69         int r;
  70
  71         if (!f.file)
  72                 return -EINVAL;
  73
  74         r = amdgpu_file_to_fpriv(f.file, &fpriv);
  75         if (r) {
  76                 fdput(f);
  77                 return r;
  78         }
  79
  80         ctx = amdgpu_ctx_get(fpriv, ctx_id);
  81
  82         if (!ctx) {
  83                 fdput(f);
  84                 return -EINVAL;
  85         }
  86
  87         amdgpu_ctx_priority_override(ctx, priority);
  88         amdgpu_ctx_put(ctx);
  89         fdput(f);
  90
  91         return 0;
  92 }
  93
  94 int amdgpu_sched_ioctl(struct drm_device *dev, void *data,
  95                        struct drm_file *filp)
  96 {
  97         union drm_amdgpu_sched *args = data;
  98         struct amdgpu_device *adev = drm_to_adev(dev);
  99         int r;
 100
 101         /* First check the op, then the op's argument.
 102          */
 103         switch (args->in.op) {
 104         case AMDGPU_SCHED_OP_PROCESS_PRIORITY_OVERRIDE:
 105         case AMDGPU_SCHED_OP_CONTEXT_PRIORITY_OVERRIDE:
 106                 break;
 107         default:
 108                 DRM_ERROR("Invalid sched op specified: %d\n", args->in.op);
 109                 return -EINVAL;
 110         }
 111
 112         if (!amdgpu_ctx_priority_is_valid(args->in.priority)) {
 113                 WARN(1, "Invalid context priority %d\n", args->in.priority);
 114                 return -EINVAL;
 115         }
 116
 117         switch (args->in.op) {
 118         case AMDGPU_SCHED_OP_PROCESS_PRIORITY_OVERRIDE:
 119                 r = amdgpu_sched_process_priority_override(adev,
 120                                                            args->in.fd,
 121                                                            args->in.priority);
 122                 break;
 123         case AMDGPU_SCHED_OP_CONTEXT_PRIORITY_OVERRIDE:
 124                 r = amdgpu_sched_context_priority_override(adev,
 125                                                            args->in.fd,
 126                                                            args->in.ctx_id,
 127                                                            args->in.priority);
 128                 break;
 129         default:
 130                 /* Impossible.
 131                  */
 132                 r = -EINVAL;
 133                 break;
 134         }
 135
 136         return r;
 137 }