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/pid.h>
  27 #include <drm/amdgpu_drm.h>
  28 #include "amdgpu.h"
  29
  30 #include "amdgpu_vm.h"
  31
  32 enum drm_sched_priority amdgpu_to_sched_priority(int amdgpu_priority)
  33 {
  34         switch (amdgpu_priority) {
  35         case AMDGPU_CTX_PRIORITY_VERY_HIGH:
  36                 return DRM_SCHED_PRIORITY_HIGH_HW;
  37         case AMDGPU_CTX_PRIORITY_HIGH:
  38                 return DRM_SCHED_PRIORITY_HIGH_SW;
  39         case AMDGPU_CTX_PRIORITY_NORMAL:
  40                 return DRM_SCHED_PRIORITY_NORMAL;
  41         case AMDGPU_CTX_PRIORITY_LOW:
  42         case AMDGPU_CTX_PRIORITY_VERY_LOW:
  43                 return DRM_SCHED_PRIORITY_LOW;
  44         case AMDGPU_CTX_PRIORITY_UNSET:
  45                 return DRM_SCHED_PRIORITY_UNSET;
  46         default:
  47                 WARN(1, "Invalid context priority %d\n", amdgpu_priority);
  48                 return DRM_SCHED_PRIORITY_INVALID;
  49         }
  50 }
  51
  52 static int amdgpu_sched_process_priority_override(struct amdgpu_device *adev,
  53                                                   int fd,
  54                                                   enum drm_sched_priority priority)
  55 {
  56         struct file *filp = fget(fd);
  57         struct amdgpu_fpriv *fpriv;
  58         struct amdgpu_ctx_mgr *mgr;
  59         struct amdgpu_ctx *ctx;
  60         uint32_t id;
  61         int r;
  62
  63         if (!filp)
  64                 return -EINVAL;
  65
  66         r = amdgpu_file_to_fpriv(filp, &fpriv);
  67         if (r) {
  68                 fput(filp);
  69                 return r;
  70         }
  71
  72         mgr = &fpriv->ctx_mgr;
  73         mutex_lock(&mgr->lock);
  74         idr_for_each_entry(&mgr->ctx_handles, ctx, id)
  75                 amdgpu_ctx_priority_override(ctx, priority);
  76         mutex_unlock(&mgr->lock);
  77
  78         fput(filp);
  79
  80         return 0;
  81 }
  82
  83 static int amdgpu_sched_context_priority_override(struct amdgpu_device *adev,
  84                                                   int fd,
  85                                                   unsigned ctx_id,
  86                                                   enum drm_sched_priority priority)
  87 {
  88         struct file *filp = fget(fd);
  89         struct amdgpu_fpriv *fpriv;
  90         struct amdgpu_ctx *ctx;
  91         int r;
  92
  93         if (!filp)
  94                 return -EINVAL;
  95
  96         r = amdgpu_file_to_fpriv(filp, &fpriv);
  97         if (r) {
  98                 fput(filp);
  99                 return r;
 100         }
 101
 102         ctx = amdgpu_ctx_get(fpriv, ctx_id);
 103
 104         if (!ctx) {
 105                 fput(filp);
 106                 return -EINVAL;
 107         }
 108
 109         amdgpu_ctx_priority_override(ctx, priority);
 110         amdgpu_ctx_put(ctx);
 111         fput(filp);
 112
 113         return 0;
 114 }
 115
 116 int amdgpu_sched_ioctl(struct drm_device *dev, void *data,
 117                        struct drm_file *filp)
 118 {
 119         union drm_amdgpu_sched *args = data;
 120         struct amdgpu_device *adev = dev->dev_private;
 121         enum drm_sched_priority priority;
 122         int r;
 123
 124         priority = amdgpu_to_sched_priority(args->in.priority);
 125         if (priority == DRM_SCHED_PRIORITY_INVALID)
 126                 return -EINVAL;
 127
 128         switch (args->in.op) {
 129         case AMDGPU_SCHED_OP_PROCESS_PRIORITY_OVERRIDE:
 130                 r = amdgpu_sched_process_priority_override(adev,
 131                                                            args->in.fd,
 132                                                            priority);
 133                 break;
 134         case AMDGPU_SCHED_OP_CONTEXT_PRIORITY_OVERRIDE:
 135                 r = amdgpu_sched_context_priority_override(adev,
 136                                                            args->in.fd,
 137                                                            args->in.ctx_id,
 138                                                            priority);
 139                 break;
 140         default:
 141                 DRM_ERROR("Invalid sched op specified: %d\n", args->in.op);
 142                 r = -EINVAL;
 143                 break;
 144         }
 145
 146         return r;
 147 }