1/*
2 * Copyright 2022 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 "amdgpu.h"
25#include "amdgpu_lsdma.h"
26
27#define AMDGPU_LSDMA_MAX_SIZE 0x2000000ULL
28
29int amdgpu_lsdma_wait_for(struct amdgpu_device *adev,
30 uint32_t reg_index, uint32_t reg_val,
31 uint32_t mask)
32{
33 uint32_t val;
34 int i;
35
36 for (i = 0; i < adev->usec_timeout; i++) {
37 val = RREG32(reg_index);
38 if ((val & mask) == reg_val)
39 return 0;
40 udelay(usec: 1);
41 }
42
43 return -ETIME;
44}
45
46int amdgpu_lsdma_copy_mem(struct amdgpu_device *adev,
47 uint64_t src_addr,
48 uint64_t dst_addr,
49 uint64_t mem_size)
50{
51 int ret;
52
53 if (mem_size == 0)
54 return -EINVAL;
55
56 while (mem_size > 0) {
57 uint64_t current_copy_size = min(mem_size, AMDGPU_LSDMA_MAX_SIZE);
58
59 ret = adev->lsdma.funcs->copy_mem(adev, src_addr, dst_addr, current_copy_size);
60 if (ret)
61 return ret;
62 src_addr += current_copy_size;
63 dst_addr += current_copy_size;
64 mem_size -= current_copy_size;
65 }
66
67 return 0;
68}
69
70int amdgpu_lsdma_fill_mem(struct amdgpu_device *adev,
71 uint64_t dst_addr,
72 uint32_t data,
73 uint64_t mem_size)
74{
75 int ret;
76
77 if (mem_size == 0)
78 return -EINVAL;
79
80 while (mem_size > 0) {
81 uint64_t current_fill_size = min(mem_size, AMDGPU_LSDMA_MAX_SIZE);
82
83 ret = adev->lsdma.funcs->fill_mem(adev, dst_addr, data, current_fill_size);
84 if (ret)
85 return ret;
86 dst_addr += current_fill_size;
87 mem_size -= current_fill_size;
88 }
89
90 return 0;
91}
92

source code of linux/drivers/gpu/drm/amd/amdgpu/amdgpu_lsdma.c