drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c

   1 /*
   2  * Copyright 2018 Advanced Micro Devices, Inc.
   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  */
  23 #include <drm/drmP.h>
  24 #include "amdgpu.h"
  25 #include "amdgpu_sdma.h"
  26
  27 /*
  28  * GPU SDMA IP block helpers function.
  29  */
  30
  31 struct amdgpu_sdma_instance *amdgpu_sdma_get_instance_from_ring(struct amdgpu_ring *ring)
  32 {
  33         struct amdgpu_device *adev = ring->adev;
  34         int i;
  35
  36         for (i = 0; i < adev->sdma.num_instances; i++)
  37                 if (ring == &adev->sdma.instance[i].ring ||
  38                     ring == &adev->sdma.instance[i].page)
  39                         return &adev->sdma.instance[i];
  40
  41         return NULL;
  42 }
  43
  44 int amdgpu_sdma_get_index_from_ring(struct amdgpu_ring *ring, uint32_t *index)
  45 {
  46         struct amdgpu_device *adev = ring->adev;
  47         int i;
  48
  49         for (i = 0; i < adev->sdma.num_instances; i++) {
  50                 if (ring == &adev->sdma.instance[i].ring ||
  51                         ring == &adev->sdma.instance[i].page) {
  52                         *index = i;
  53                         return 0;
  54                 }
  55         }
  56
  57         return -EINVAL;
  58 }