LXR linux/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue

   1/*
   2 * Copyright 2014 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
  24#include "kfd_kernel_queue.h"
  25
  26static bool initialize_vi(struct kernel_queue *kq, struct kfd_dev *dev,
  27                        enum kfd_queue_type type, unsigned int queue_size);
  28static void uninitialize_vi(struct kernel_queue *kq);
  29
  30void kernel_queue_init_vi(struct kernel_queue_ops *ops)
  31{
  32        ops->initialize = initialize_vi;
  33        ops->uninitialize = uninitialize_vi;
  34}
  35
  36static bool initialize_vi(struct kernel_queue *kq, struct kfd_dev *dev,
  37                        enum kfd_queue_type type, unsigned int queue_size)
  38{
  39        int retval;
  40
  41        retval = kfd_gtt_sa_allocate(dev, PAGE_SIZE, &kq->eop_mem);
  42        if (retval != 0)
  43                return false;
  44
  45        kq->eop_gpu_addr = kq->eop_mem->gpu_addr;
  46        kq->eop_kernel_addr = kq->eop_mem->cpu_ptr;
  47
  48        memset(kq->eop_kernel_addr, 0, PAGE_SIZE);
  49
  50        return true;
  51}
  52
  53static void uninitialize_vi(struct kernel_queue *kq)
  54{
  55        kfd_gtt_sa_free(kq->dev, kq->eop_mem);
  56}
  57