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 <[email protected]>
  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_mgr *mgr;
  42         struct amdgpu_ctx *ctx;
  43         uint32_t id;
  44         int r;
  45
  46         if (!f.file)
  47                 return -EINVAL;
  48
  49         r = amdgpu_file_to_fpriv(f.file, &fpriv);
  50         if (r) {
  51                 fdput(f);
  52                 return r;
  53         }
  54
  55         mgr = &fpriv->ctx_mgr;
  56         mutex_lock(&mgr->lock);
  57         idr_for_each_entry(&mgr->ctx_handles, ctx, id)
  58                 amdgpu_ctx_priority_override(ctx, priority);
  59         mutex_unlock(&mgr->lock);
  60
  61         fdput(f);
  62         return 0;
  63 }
  64
  65 static int amdgpu_sched_context_priority_override(struct amdgpu_device *adev,
  66                                                   int fd,
  67                                                   unsigned ctx_id,
  68                                                   int32_t priority)
  69 {
  70         struct fd f = fdget(fd);
  71         struct amdgpu_fpriv *fpriv;
  72         struct amdgpu_ctx *ctx;
  73         int r;
  74
  75         if (!f.file)
  76                 return -EINVAL;
  77
  78         r = amdgpu_file_to_fpriv(f.file, &fpriv);
  79         if (r) {
  80                 fdput(f);
  81                 return r;
  82         }
  83
  84         ctx = amdgpu_ctx_get(fpriv, ctx_id);
  85
  86         if (!ctx) {
  87                 fdput(f);
  88                 return -EINVAL;
  89         }
  90
  91         amdgpu_ctx_priority_override(ctx, priority);
  92         amdgpu_ctx_put(ctx);
  93         fdput(f);
  94
  95         return 0;
  96 }
  97
  98 int amdgpu_sched_ioctl(struct drm_device *dev, void *data,
  99                        struct drm_file *filp)
 100 {
 101         union drm_amdgpu_sched *args = data;
 102         struct amdgpu_device *adev = drm_to_adev(dev);
 103         int r;
 104
 105         /* First check the op, then the op's argument.
 106          */
 107         switch (args->in.op) {
 108         case AMDGPU_SCHED_OP_PROCESS_PRIORITY_OVERRIDE:
 109         case AMDGPU_SCHED_OP_CONTEXT_PRIORITY_OVERRIDE:
 110                 break;
 111         default:
 112                 DRM_ERROR("Invalid sched op specified: %d\n", args->in.op);
 113                 return -EINVAL;
 114         }
 115
 116         if (!amdgpu_ctx_priority_is_valid(args->in.priority)) {
 117                 WARN(1, "Invalid context priority %d\n", args->in.priority);
 118                 return -EINVAL;
 119         }
 120
 121         switch (args->in.op) {
 122         case AMDGPU_SCHED_OP_PROCESS_PRIORITY_OVERRIDE:
 123                 r = amdgpu_sched_process_priority_override(adev,
 124                                                            args->in.fd,
 125                                                            args->in.priority);
 126                 break;
 127         case AMDGPU_SCHED_OP_CONTEXT_PRIORITY_OVERRIDE:
 128                 r = amdgpu_sched_context_priority_override(adev,
 129                                                            args->in.fd,
 130                                                            args->in.ctx_id,
 131                                                            args->in.priority);
 132                 break;
 133         default:
 134                 /* Impossible.
 135                  */
 136                 r = -EINVAL;
 137                 break;
 138         }
 139
 140         return r;
 141 }