1/*
2 * Copyright 2023 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_v7_0.h"
27#include "amdgpu_lsdma.h"
28
29#include "lsdma/lsdma_7_0_0_offset.h"
30#include "lsdma/lsdma_7_0_0_sh_mask.h"
31
32static int lsdma_v7_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
39static int lsdma_v7_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_v7_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
72static int lsdma_v7_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_v7_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
104static void lsdma_v7_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
117const struct amdgpu_lsdma_funcs lsdma_v7_0_funcs = {
118 .copy_mem = lsdma_v7_0_copy_mem,
119 .fill_mem = lsdma_v7_0_fill_mem,
120 .update_memory_power_gating = lsdma_v7_0_update_memory_power_gating
121};
122

source code of linux/drivers/gpu/drm/amd/amdgpu/lsdma_v7_0.c