1/*
2 * Copyright 2020 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#include "amdgpu.h"
24#include "amdgpu_atombios.h"
25#include "hdp_v5_0.h"
26
27#include "hdp/hdp_5_0_0_offset.h"
28#include "hdp/hdp_5_0_0_sh_mask.h"
29#include <uapi/linux/kfd_ioctl.h>
30
31static void hdp_v5_0_flush_hdp(struct amdgpu_device *adev,
32 struct amdgpu_ring *ring)
33{
34 if (!ring || !ring->funcs->emit_wreg)
35 WREG32_NO_KIQ((adev->rmmio_remap.reg_offset + KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL) >> 2, 0);
36 else
37 amdgpu_ring_emit_wreg(ring, (adev->rmmio_remap.reg_offset + KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL) >> 2, 0);
38}
39
40static void hdp_v5_0_invalidate_hdp(struct amdgpu_device *adev,
41 struct amdgpu_ring *ring)
42{
43 if (!ring || !ring->funcs->emit_wreg) {
44 WREG32_SOC15_NO_KIQ(HDP, 0, mmHDP_READ_CACHE_INVALIDATE, 1);
45 } else {
46 amdgpu_ring_emit_wreg(ring, SOC15_REG_OFFSET(
47 HDP, 0, mmHDP_READ_CACHE_INVALIDATE), 1);
48 }
49}
50
51static void hdp_v5_0_update_mem_power_gating(struct amdgpu_device *adev,
52 bool enable)
53{
54 uint32_t hdp_clk_cntl, hdp_clk_cntl1;
55 uint32_t hdp_mem_pwr_cntl;
56
57 if (!(adev->cg_flags & (AMD_CG_SUPPORT_HDP_LS |
58 AMD_CG_SUPPORT_HDP_DS |
59 AMD_CG_SUPPORT_HDP_SD)))
60 return;
61
62 hdp_clk_cntl = hdp_clk_cntl1 = RREG32_SOC15(HDP, 0, mmHDP_CLK_CNTL);
63 hdp_mem_pwr_cntl = RREG32_SOC15(HDP, 0, mmHDP_MEM_POWER_CTRL);
64
65 /* Before doing clock/power mode switch,
66 * forced on IPH & RC clock */
67 hdp_clk_cntl = REG_SET_FIELD(hdp_clk_cntl, HDP_CLK_CNTL,
68 IPH_MEM_CLK_SOFT_OVERRIDE, 1);
69 hdp_clk_cntl = REG_SET_FIELD(hdp_clk_cntl, HDP_CLK_CNTL,
70 RC_MEM_CLK_SOFT_OVERRIDE, 1);
71 WREG32_SOC15(HDP, 0, mmHDP_CLK_CNTL, hdp_clk_cntl);
72
73 /* HDP 5.0 doesn't support dynamic power mode switch,
74 * disable clock and power gating before any changing */
75 hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl, HDP_MEM_POWER_CTRL,
76 IPH_MEM_POWER_CTRL_EN, 0);
77 hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl, HDP_MEM_POWER_CTRL,
78 IPH_MEM_POWER_LS_EN, 0);
79 hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl, HDP_MEM_POWER_CTRL,
80 IPH_MEM_POWER_DS_EN, 0);
81 hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl, HDP_MEM_POWER_CTRL,
82 IPH_MEM_POWER_SD_EN, 0);
83 hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl, HDP_MEM_POWER_CTRL,
84 RC_MEM_POWER_CTRL_EN, 0);
85 hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl, HDP_MEM_POWER_CTRL,
86 RC_MEM_POWER_LS_EN, 0);
87 hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl, HDP_MEM_POWER_CTRL,
88 RC_MEM_POWER_DS_EN, 0);
89 hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl, HDP_MEM_POWER_CTRL,
90 RC_MEM_POWER_SD_EN, 0);
91 WREG32_SOC15(HDP, 0, mmHDP_MEM_POWER_CTRL, hdp_mem_pwr_cntl);
92
93 /* Already disabled above. The actions below are for "enabled" only */
94 if (enable) {
95 /* only one clock gating mode (LS/DS/SD) can be enabled */
96 if (adev->cg_flags & AMD_CG_SUPPORT_HDP_LS) {
97 hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl,
98 HDP_MEM_POWER_CTRL,
99 IPH_MEM_POWER_LS_EN, 1);
100 hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl,
101 HDP_MEM_POWER_CTRL,
102 RC_MEM_POWER_LS_EN, 1);
103 } else if (adev->cg_flags & AMD_CG_SUPPORT_HDP_DS) {
104 hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl,
105 HDP_MEM_POWER_CTRL,
106 IPH_MEM_POWER_DS_EN, 1);
107 hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl,
108 HDP_MEM_POWER_CTRL,
109 RC_MEM_POWER_DS_EN, 1);
110 } else if (adev->cg_flags & AMD_CG_SUPPORT_HDP_SD) {
111 hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl,
112 HDP_MEM_POWER_CTRL,
113 IPH_MEM_POWER_SD_EN, 1);
114 /* RC should not use shut down mode, fallback to ds or ls if allowed */
115 if (adev->cg_flags & AMD_CG_SUPPORT_HDP_DS)
116 hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl,
117 HDP_MEM_POWER_CTRL,
118 RC_MEM_POWER_DS_EN, 1);
119 else if (adev->cg_flags & AMD_CG_SUPPORT_HDP_LS)
120 hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl,
121 HDP_MEM_POWER_CTRL,
122 RC_MEM_POWER_LS_EN, 1);
123 }
124
125 /* confirmed that IPH_MEM_POWER_CTRL_EN and RC_MEM_POWER_CTRL_EN have to
126 * be set for SRAM LS/DS/SD */
127 if (adev->cg_flags & (AMD_CG_SUPPORT_HDP_LS | AMD_CG_SUPPORT_HDP_DS |
128 AMD_CG_SUPPORT_HDP_SD)) {
129 hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl, HDP_MEM_POWER_CTRL,
130 IPH_MEM_POWER_CTRL_EN, 1);
131 hdp_mem_pwr_cntl = REG_SET_FIELD(hdp_mem_pwr_cntl, HDP_MEM_POWER_CTRL,
132 RC_MEM_POWER_CTRL_EN, 1);
133 WREG32_SOC15(HDP, 0, mmHDP_MEM_POWER_CTRL, hdp_mem_pwr_cntl);
134 }
135 }
136
137 /* disable IPH & RC clock override after clock/power mode changing */
138 hdp_clk_cntl = REG_SET_FIELD(hdp_clk_cntl, HDP_CLK_CNTL,
139 IPH_MEM_CLK_SOFT_OVERRIDE, 0);
140 hdp_clk_cntl = REG_SET_FIELD(hdp_clk_cntl, HDP_CLK_CNTL,
141 RC_MEM_CLK_SOFT_OVERRIDE, 0);
142 WREG32_SOC15(HDP, 0, mmHDP_CLK_CNTL, hdp_clk_cntl);
143}
144
145static void hdp_v5_0_update_medium_grain_clock_gating(struct amdgpu_device *adev,
146 bool enable)
147{
148 uint32_t hdp_clk_cntl;
149
150 if (!(adev->cg_flags & AMD_CG_SUPPORT_HDP_MGCG))
151 return;
152
153 hdp_clk_cntl = RREG32_SOC15(HDP, 0, mmHDP_CLK_CNTL);
154
155 if (enable) {
156 hdp_clk_cntl &=
157 ~(uint32_t)
158 (HDP_CLK_CNTL__IPH_MEM_CLK_SOFT_OVERRIDE_MASK |
159 HDP_CLK_CNTL__RC_MEM_CLK_SOFT_OVERRIDE_MASK |
160 HDP_CLK_CNTL__DBUS_CLK_SOFT_OVERRIDE_MASK |
161 HDP_CLK_CNTL__DYN_CLK_SOFT_OVERRIDE_MASK |
162 HDP_CLK_CNTL__XDP_REG_CLK_SOFT_OVERRIDE_MASK |
163 HDP_CLK_CNTL__HDP_REG_CLK_SOFT_OVERRIDE_MASK);
164 } else {
165 hdp_clk_cntl |= HDP_CLK_CNTL__IPH_MEM_CLK_SOFT_OVERRIDE_MASK |
166 HDP_CLK_CNTL__RC_MEM_CLK_SOFT_OVERRIDE_MASK |
167 HDP_CLK_CNTL__DBUS_CLK_SOFT_OVERRIDE_MASK |
168 HDP_CLK_CNTL__DYN_CLK_SOFT_OVERRIDE_MASK |
169 HDP_CLK_CNTL__XDP_REG_CLK_SOFT_OVERRIDE_MASK |
170 HDP_CLK_CNTL__HDP_REG_CLK_SOFT_OVERRIDE_MASK;
171 }
172
173 WREG32_SOC15(HDP, 0, mmHDP_CLK_CNTL, hdp_clk_cntl);
174}
175
176static void hdp_v5_0_update_clock_gating(struct amdgpu_device *adev,
177 bool enable)
178{
179 hdp_v5_0_update_mem_power_gating(adev, enable);
180 hdp_v5_0_update_medium_grain_clock_gating(adev, enable);
181}
182
183static void hdp_v5_0_get_clockgating_state(struct amdgpu_device *adev,
184 u64 *flags)
185{
186 uint32_t tmp;
187
188 /* AMD_CG_SUPPORT_HDP_MGCG */
189 tmp = RREG32_SOC15(HDP, 0, mmHDP_CLK_CNTL);
190 if (!(tmp & (HDP_CLK_CNTL__IPH_MEM_CLK_SOFT_OVERRIDE_MASK |
191 HDP_CLK_CNTL__RC_MEM_CLK_SOFT_OVERRIDE_MASK |
192 HDP_CLK_CNTL__DBUS_CLK_SOFT_OVERRIDE_MASK |
193 HDP_CLK_CNTL__DYN_CLK_SOFT_OVERRIDE_MASK |
194 HDP_CLK_CNTL__XDP_REG_CLK_SOFT_OVERRIDE_MASK |
195 HDP_CLK_CNTL__HDP_REG_CLK_SOFT_OVERRIDE_MASK)))
196 *flags |= AMD_CG_SUPPORT_HDP_MGCG;
197
198 /* AMD_CG_SUPPORT_HDP_LS/DS/SD */
199 tmp = RREG32_SOC15(HDP, 0, mmHDP_MEM_POWER_CTRL);
200 if (tmp & HDP_MEM_POWER_CTRL__IPH_MEM_POWER_LS_EN_MASK)
201 *flags |= AMD_CG_SUPPORT_HDP_LS;
202 else if (tmp & HDP_MEM_POWER_CTRL__IPH_MEM_POWER_DS_EN_MASK)
203 *flags |= AMD_CG_SUPPORT_HDP_DS;
204 else if (tmp & HDP_MEM_POWER_CTRL__IPH_MEM_POWER_SD_EN_MASK)
205 *flags |= AMD_CG_SUPPORT_HDP_SD;
206}
207
208static void hdp_v5_0_init_registers(struct amdgpu_device *adev)
209{
210 u32 tmp;
211
212 tmp = RREG32_SOC15(HDP, 0, mmHDP_MISC_CNTL);
213 tmp |= HDP_MISC_CNTL__FLUSH_INVALIDATE_CACHE_MASK;
214 WREG32_SOC15(HDP, 0, mmHDP_MISC_CNTL, tmp);
215}
216
217const struct amdgpu_hdp_funcs hdp_v5_0_funcs = {
218 .flush_hdp = hdp_v5_0_flush_hdp,
219 .invalidate_hdp = hdp_v5_0_invalidate_hdp,
220 .update_clock_gating = hdp_v5_0_update_clock_gating,
221 .get_clock_gating_state = hdp_v5_0_get_clockgating_state,
222 .init_registers = hdp_v5_0_init_registers,
223};
224

source code of linux/drivers/gpu/drm/amd/amdgpu/hdp_v5_0.c