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
kernel_queue_init_vi(struct kernel_queue_ops * ops)30 void kernel_queue_init_vi(struct kernel_queue_ops *ops)
31 {
32 ops->initialize = initialize_vi;
33 ops->uninitialize = uninitialize_vi;
34 }
35
initialize_vi(struct kernel_queue * kq,struct kfd_dev * dev,enum kfd_queue_type type,unsigned int queue_size)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
uninitialize_vi(struct kernel_queue * kq)53 static void uninitialize_vi(struct kernel_queue *kq)
54 {
55 kfd_gtt_sa_free(kq->dev, kq->eop_mem);
56 }
57