drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_vi.c

   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
  26 static bool initialize_vi(struct kernel_queue *kq, struct kfd_dev *dev,
  27                         enum kfd_queue_type type, unsigned int queue_size);
  28 static void uninitialize_vi(struct kernel_queue *kq);
  29
  30 void kernel_queue_init_vi(struct kernel_queue_ops *ops)
  31 {
  32         ops->initialize = initialize_vi;
  33         ops->uninitialize = uninitialize_vi;
  34 }
  35
  36 static 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
  53 static void uninitialize_vi(struct kernel_queue *kq)
  54 {
  55         kfd_gtt_sa_free(kq->dev, kq->eop_mem);
  56 }