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