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 = fcheck(fd);
  57         struct drm_file *file;
  58         struct pid *pid;
  59         struct amdgpu_fpriv *fpriv;
  60         struct amdgpu_ctx *ctx;
  61         uint32_t id;
  62
  63         if (!filp)
  64                 return -EINVAL;
  65
  66         pid = get_pid(((struct drm_file *)filp->private_data)->pid);
  67
  68         mutex_lock(&adev->ddev->filelist_mutex);
  69         list_for_each_entry(file, &adev->ddev->filelist, lhead) {
  70                 if (file->pid != pid)
  71                         continue;
  72
  73                 fpriv = file->driver_priv;
  74                 idr_for_each_entry(&fpriv->ctx_mgr.ctx_handles, ctx, id)
  75                                 amdgpu_ctx_priority_override(ctx, priority);
  76         }
  77         mutex_unlock(&adev->ddev->filelist_mutex);
  78
  79         put_pid(pid);
  80
  81         return 0;
  82 }
  83
  84 int amdgpu_sched_ioctl(struct drm_device *dev, void *data,
  85                        struct drm_file *filp)
  86 {
  87         union drm_amdgpu_sched *args = data;
  88         struct amdgpu_device *adev = dev->dev_private;
  89         enum drm_sched_priority priority;
  90         int r;
  91
  92         priority = amdgpu_to_sched_priority(args->in.priority);
  93         if (args->in.flags || priority == DRM_SCHED_PRIORITY_INVALID)
  94                 return -EINVAL;
  95
  96         switch (args->in.op) {
  97         case AMDGPU_SCHED_OP_PROCESS_PRIORITY_OVERRIDE:
  98                 r = amdgpu_sched_process_priority_override(adev,
  99                                                            args->in.fd,
 100                                                            priority);
 101                 break;
 102         default:
 103                 DRM_ERROR("Invalid sched op specified: %d\n", args->in.op);
 104                 r = -EINVAL;
 105                 break;
 106         }
 107
 108         return r;
 109 }