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 <linux/delay.h>
25 #include "amdgpu.h"
26 #include "lsdma_v6_0.h"
27 #include "amdgpu_lsdma.h"
28 
29 #include "lsdma/lsdma_6_0_0_offset.h"
30 #include "lsdma/lsdma_6_0_0_sh_mask.h"
31 
32 static int lsdma_v6_0_wait_pio_status(struct amdgpu_device *adev)
33 {
34 	return amdgpu_lsdma_wait_for(adev, SOC15_REG_OFFSET(LSDMA, 0, regLSDMA_PIO_STATUS),
35 			LSDMA_PIO_STATUS__PIO_IDLE_MASK | LSDMA_PIO_STATUS__PIO_FIFO_EMPTY_MASK,
36 			LSDMA_PIO_STATUS__PIO_IDLE_MASK | LSDMA_PIO_STATUS__PIO_FIFO_EMPTY_MASK);
37 }
38 
39 static int lsdma_v6_0_copy_mem(struct amdgpu_device *adev,
40 			       uint64_t src_addr,
41 			       uint64_t dst_addr,
42 			       uint64_t size)
43 {
44 	int ret;
45 	uint32_t tmp;
46 
47 	WREG32_SOC15(LSDMA, 0, regLSDMA_PIO_SRC_ADDR_LO, lower_32_bits(src_addr));
48 	WREG32_SOC15(LSDMA, 0, regLSDMA_PIO_SRC_ADDR_HI, upper_32_bits(src_addr));
49 
50 	WREG32_SOC15(LSDMA, 0, regLSDMA_PIO_DST_ADDR_LO, lower_32_bits(dst_addr));
51 	WREG32_SOC15(LSDMA, 0, regLSDMA_PIO_DST_ADDR_HI, upper_32_bits(dst_addr));
52 
53 	WREG32_SOC15(LSDMA, 0, regLSDMA_PIO_CONTROL, 0x0);
54 
55 	tmp = RREG32_SOC15(LSDMA, 0, regLSDMA_PIO_COMMAND);
56 	tmp = REG_SET_FIELD(tmp, LSDMA_PIO_COMMAND, BYTE_COUNT, size);
57 	tmp = REG_SET_FIELD(tmp, LSDMA_PIO_COMMAND, SRC_LOCATION, 0);
58 	tmp = REG_SET_FIELD(tmp, LSDMA_PIO_COMMAND, DST_LOCATION, 0);
59 	tmp = REG_SET_FIELD(tmp, LSDMA_PIO_COMMAND, SRC_ADDR_INC, 0);
60 	tmp = REG_SET_FIELD(tmp, LSDMA_PIO_COMMAND, DST_ADDR_INC, 0);
61 	tmp = REG_SET_FIELD(tmp, LSDMA_PIO_COMMAND, OVERLAP_DISABLE, 0);
62 	tmp = REG_SET_FIELD(tmp, LSDMA_PIO_COMMAND, CONSTANT_FILL, 0);
63 	WREG32_SOC15(LSDMA, 0, regLSDMA_PIO_COMMAND, tmp);
64 
65 	ret = lsdma_v6_0_wait_pio_status(adev);
66 	if (ret)
67 		dev_err(adev->dev, "LSDMA PIO failed to copy memory!\n");
68 
69 	return ret;
70 }
71 
72 static int lsdma_v6_0_fill_mem(struct amdgpu_device *adev,
73 			       uint64_t dst_addr,
74 			       uint32_t data,
75 			       uint64_t size)
76 {
77 	int ret;
78 	uint32_t tmp;
79 
80 	WREG32_SOC15(LSDMA, 0, regLSDMA_PIO_CONSTFILL_DATA, data);
81 
82 	WREG32_SOC15(LSDMA, 0, regLSDMA_PIO_DST_ADDR_LO, lower_32_bits(dst_addr));
83 	WREG32_SOC15(LSDMA, 0, regLSDMA_PIO_DST_ADDR_HI, upper_32_bits(dst_addr));
84 
85 	WREG32_SOC15(LSDMA, 0, regLSDMA_PIO_CONTROL, 0x0);
86 
87 	tmp = RREG32_SOC15(LSDMA, 0, regLSDMA_PIO_COMMAND);
88 	tmp = REG_SET_FIELD(tmp, LSDMA_PIO_COMMAND, BYTE_COUNT, size);
89 	tmp = REG_SET_FIELD(tmp, LSDMA_PIO_COMMAND, SRC_LOCATION, 0);
90 	tmp = REG_SET_FIELD(tmp, LSDMA_PIO_COMMAND, DST_LOCATION, 0);
91 	tmp = REG_SET_FIELD(tmp, LSDMA_PIO_COMMAND, SRC_ADDR_INC, 0);
92 	tmp = REG_SET_FIELD(tmp, LSDMA_PIO_COMMAND, DST_ADDR_INC, 0);
93 	tmp = REG_SET_FIELD(tmp, LSDMA_PIO_COMMAND, OVERLAP_DISABLE, 0);
94 	tmp = REG_SET_FIELD(tmp, LSDMA_PIO_COMMAND, CONSTANT_FILL, 1);
95 	WREG32_SOC15(LSDMA, 0, regLSDMA_PIO_COMMAND, tmp);
96 
97 	ret = lsdma_v6_0_wait_pio_status(adev);
98 	if (ret)
99 		dev_err(adev->dev, "LSDMA PIO failed to fill memory!\n");
100 
101 	return ret;
102 }
103 
104 static void lsdma_v6_0_update_memory_power_gating(struct amdgpu_device *adev,
105 						 bool enable)
106 {
107 	uint32_t tmp;
108 
109 	tmp = RREG32_SOC15(LSDMA, 0, regLSDMA_MEM_POWER_CTRL);
110 	tmp = REG_SET_FIELD(tmp, LSDMA_MEM_POWER_CTRL, MEM_POWER_CTRL_EN, 0);
111 	WREG32_SOC15(LSDMA, 0, regLSDMA_MEM_POWER_CTRL, tmp);
112 
113 	tmp = REG_SET_FIELD(tmp, LSDMA_MEM_POWER_CTRL, MEM_POWER_CTRL_EN, enable);
114 	WREG32_SOC15(LSDMA, 0, regLSDMA_MEM_POWER_CTRL, tmp);
115 }
116 
117 const struct amdgpu_lsdma_funcs lsdma_v6_0_funcs = {
118 	.copy_mem = lsdma_v6_0_copy_mem,
119 	.fill_mem = lsdma_v6_0_fill_mem,
120 	.update_memory_power_gating = lsdma_v6_0_update_memory_power_gating
121 };
122