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 | |
29 | int 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(1); |
41 | } |
42 | |
43 | return -ETIME; |
44 | } |
45 | |
46 | int 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 | |
70 | int 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 | |