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