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/file.h>
  26 #include <linux/pid.h>
  27
  28 #include <drm/amdgpu_drm.h>
  29
  30 #include "amdgpu.h"
  31 #include "amdgpu_sched.h"
  32 #include "amdgpu_vm.h"
  33
  34 static int amdgpu_sched_process_priority_override(struct amdgpu_device *adev,
  35                                                   int fd,
  36                                                   int32_t priority)
  37 {
  38         struct fd f = fdget(fd);
  39         struct amdgpu_fpriv *fpriv;
  40         struct amdgpu_ctx_mgr *mgr;
  41         struct amdgpu_ctx *ctx;
  42         uint32_t id;
  43         int r;
  44
  45         if (!fd_file(f))
  46                 return -EINVAL;
  47
  48         r = amdgpu_file_to_fpriv(fd_file(f), &fpriv);
  49         if (r) {
  50                 fdput(f);
  51                 return r;
  52         }
  53
  54         mgr = &fpriv->ctx_mgr;
  55         mutex_lock(&mgr->lock);
  56         idr_for_each_entry(&mgr->ctx_handles, ctx, id)
  57                 amdgpu_ctx_priority_override(ctx, priority);
  58         mutex_unlock(&mgr->lock);
  59
  60         fdput(f);
  61         return 0;
  62 }
  63
  64 static int amdgpu_sched_context_priority_override(struct amdgpu_device *adev,
  65                                                   int fd,
  66                                                   unsigned ctx_id,
  67                                                   int32_t priority)
  68 {
  69         struct fd f = fdget(fd);
  70         struct amdgpu_fpriv *fpriv;
  71         struct amdgpu_ctx *ctx;
  72         int r;
  73
  74         if (!fd_file(f))
  75                 return -EINVAL;
  76
  77         r = amdgpu_file_to_fpriv(fd_file(f), &fpriv);
  78         if (r) {
  79                 fdput(f);
  80                 return r;
  81         }
  82
  83         ctx = amdgpu_ctx_get(fpriv, ctx_id);
  84
  85         if (!ctx) {
  86                 fdput(f);
  87                 return -EINVAL;
  88         }
  89
  90         amdgpu_ctx_priority_override(ctx, priority);
  91         amdgpu_ctx_put(ctx);
  92         fdput(f);
  93
  94         return 0;
  95 }
  96
  97 int amdgpu_sched_ioctl(struct drm_device *dev, void *data,
  98                        struct drm_file *filp)
  99 {
 100         union drm_amdgpu_sched *args = data;
 101         struct amdgpu_device *adev = drm_to_adev(dev);
 102         int r;
 103
 104         /* First check the op, then the op's argument.
 105          */
 106         switch (args->in.op) {
 107         case AMDGPU_SCHED_OP_PROCESS_PRIORITY_OVERRIDE:
 108         case AMDGPU_SCHED_OP_CONTEXT_PRIORITY_OVERRIDE:
 109                 break;
 110         default:
 111                 DRM_ERROR("Invalid sched op specified: %d\n", args->in.op);
 112                 return -EINVAL;
 113         }
 114
 115         if (!amdgpu_ctx_priority_is_valid(args->in.priority)) {
 116                 WARN(1, "Invalid context priority %d\n", args->in.priority);
 117                 return -EINVAL;
 118         }
 119
 120         switch (args->in.op) {
 121         case AMDGPU_SCHED_OP_PROCESS_PRIORITY_OVERRIDE:
 122                 r = amdgpu_sched_process_priority_override(adev,
 123                                                            args->in.fd,
 124                                                            args->in.priority);
 125                 break;
 126         case AMDGPU_SCHED_OP_CONTEXT_PRIORITY_OVERRIDE:
 127                 r = amdgpu_sched_context_priority_override(adev,
 128                                                            args->in.fd,
 129                                                            args->in.ctx_id,
 130                                                            args->in.priority);
 131                 break;
 132         default:
 133                 /* Impossible.
 134                  */
 135                 r = -EINVAL;
 136                 break;
 137         }
 138
 139         return r;
 140 }