1/*
2 * Copyright 2011 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 * Authors: Alex Deucher
23 */
24
25#include <linux/firmware.h>
26#include <drm/drmP.h>
27#include "amdgpu.h"
28#include "sid.h"
29#include "ppsmc.h"
30#include "amdgpu_ucode.h"
31#include "sislands_smc.h"
32
33static int si_set_smc_sram_address(struct amdgpu_device *adev,
34 u32 smc_address, u32 limit)
35{
36 if (smc_address & 3)
37 return -EINVAL;
38 if ((smc_address + 3) > limit)
39 return -EINVAL;
40
41 WREG32(SMC_IND_INDEX_0, smc_address);
42 WREG32_P(SMC_IND_ACCESS_CNTL, 0, ~AUTO_INCREMENT_IND_0);
43
44 return 0;
45}
46
47int amdgpu_si_copy_bytes_to_smc(struct amdgpu_device *adev,
48 u32 smc_start_address,
49 const u8 *src, u32 byte_count, u32 limit)
50{
51 unsigned long flags;
52 int ret = 0;
53 u32 data, original_data, addr, extra_shift;
54
55 if (smc_start_address & 3)
56 return -EINVAL;
57 if ((smc_start_address + byte_count) > limit)
58 return -EINVAL;
59
60 addr = smc_start_address;
61
62 spin_lock_irqsave(&adev->smc_idx_lock, flags);
63 while (byte_count >= 4) {
64 /* SMC address space is BE */
65 data = (src[0] << 24) | (src[1] << 16) | (src[2] << 8) | src[3];
66
67 ret = si_set_smc_sram_address(adev, addr, limit);
68 if (ret)
69 goto done;
70
71 WREG32(SMC_IND_DATA_0, data);
72
73 src += 4;
74 byte_count -= 4;
75 addr += 4;
76 }
77
78 /* RMW for the final bytes */
79 if (byte_count > 0) {
80 data = 0;
81
82 ret = si_set_smc_sram_address(adev, addr, limit);
83 if (ret)
84 goto done;
85
86 original_data = RREG32(SMC_IND_DATA_0);
87 extra_shift = 8 * (4 - byte_count);
88
89 while (byte_count > 0) {
90 /* SMC address space is BE */
91 data = (data << 8) + *src++;
92 byte_count--;
93 }
94
95 data <<= extra_shift;
96 data |= (original_data & ~((~0UL) << extra_shift));
97
98 ret = si_set_smc_sram_address(adev, addr, limit);
99 if (ret)
100 goto done;
101
102 WREG32(SMC_IND_DATA_0, data);
103 }
104
105done:
106 spin_unlock_irqrestore(&adev->smc_idx_lock, flags);
107
108 return ret;
109}
110
111void amdgpu_si_start_smc(struct amdgpu_device *adev)
112{
113 u32 tmp = RREG32_SMC(SMC_SYSCON_RESET_CNTL);
114
115 tmp &= ~RST_REG;
116
117 WREG32_SMC(SMC_SYSCON_RESET_CNTL, tmp);
118}
119
120void amdgpu_si_reset_smc(struct amdgpu_device *adev)
121{
122 u32 tmp;
123
124 RREG32(CB_CGTT_SCLK_CTRL);
125 RREG32(CB_CGTT_SCLK_CTRL);
126 RREG32(CB_CGTT_SCLK_CTRL);
127 RREG32(CB_CGTT_SCLK_CTRL);
128
129 tmp = RREG32_SMC(SMC_SYSCON_RESET_CNTL) |
130 RST_REG;
131 WREG32_SMC(SMC_SYSCON_RESET_CNTL, tmp);
132}
133
134int amdgpu_si_program_jump_on_start(struct amdgpu_device *adev)
135{
136 static const u8 data[] = { 0x0E, 0x00, 0x40, 0x40 };
137
138 return amdgpu_si_copy_bytes_to_smc(adev, 0x0, data, 4, sizeof(data)+1);
139}
140
141void amdgpu_si_smc_clock(struct amdgpu_device *adev, bool enable)
142{
143 u32 tmp = RREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0);
144
145 if (enable)
146 tmp &= ~CK_DISABLE;
147 else
148 tmp |= CK_DISABLE;
149
150 WREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0, tmp);
151}
152
153bool amdgpu_si_is_smc_running(struct amdgpu_device *adev)
154{
155 u32 rst = RREG32_SMC(SMC_SYSCON_RESET_CNTL);
156 u32 clk = RREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0);
157
158 if (!(rst & RST_REG) && !(clk & CK_DISABLE))
159 return true;
160
161 return false;
162}
163
164PPSMC_Result amdgpu_si_send_msg_to_smc(struct amdgpu_device *adev,
165 PPSMC_Msg msg)
166{
167 u32 tmp;
168 int i;
169
170 if (!amdgpu_si_is_smc_running(adev))
171 return PPSMC_Result_Failed;
172
173 WREG32(SMC_MESSAGE_0, msg);
174
175 for (i = 0; i < adev->usec_timeout; i++) {
176 tmp = RREG32(SMC_RESP_0);
177 if (tmp != 0)
178 break;
179 udelay(1);
180 }
181
182 return (PPSMC_Result)RREG32(SMC_RESP_0);
183}
184
185PPSMC_Result amdgpu_si_wait_for_smc_inactive(struct amdgpu_device *adev)
186{
187 u32 tmp;
188 int i;
189
190 if (!amdgpu_si_is_smc_running(adev))
191 return PPSMC_Result_OK;
192
193 for (i = 0; i < adev->usec_timeout; i++) {
194 tmp = RREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0);
195 if ((tmp & CKEN) == 0)
196 break;
197 udelay(1);
198 }
199
200 return PPSMC_Result_OK;
201}
202
203int amdgpu_si_load_smc_ucode(struct amdgpu_device *adev, u32 limit)
204{
205 const struct smc_firmware_header_v1_0 *hdr;
206 unsigned long flags;
207 u32 ucode_start_address;
208 u32 ucode_size;
209 const u8 *src;
210 u32 data;
211
212 if (!adev->pm.fw)
213 return -EINVAL;
214
215 hdr = (const struct smc_firmware_header_v1_0 *)adev->pm.fw->data;
216
217 amdgpu_ucode_print_smc_hdr(&hdr->header);
218
219 adev->pm.fw_version = le32_to_cpu(hdr->header.ucode_version);
220 ucode_start_address = le32_to_cpu(hdr->ucode_start_addr);
221 ucode_size = le32_to_cpu(hdr->header.ucode_size_bytes);
222 src = (const u8 *)
223 (adev->pm.fw->data + le32_to_cpu(hdr->header.ucode_array_offset_bytes));
224 if (ucode_size & 3)
225 return -EINVAL;
226
227 spin_lock_irqsave(&adev->smc_idx_lock, flags);
228 WREG32(SMC_IND_INDEX_0, ucode_start_address);
229 WREG32_P(SMC_IND_ACCESS_CNTL, AUTO_INCREMENT_IND_0, ~AUTO_INCREMENT_IND_0);
230 while (ucode_size >= 4) {
231 /* SMC address space is BE */
232 data = (src[0] << 24) | (src[1] << 16) | (src[2] << 8) | src[3];
233
234 WREG32(SMC_IND_DATA_0, data);
235
236 src += 4;
237 ucode_size -= 4;
238 }
239 WREG32_P(SMC_IND_ACCESS_CNTL, 0, ~AUTO_INCREMENT_IND_0);
240 spin_unlock_irqrestore(&adev->smc_idx_lock, flags);
241
242 return 0;
243}
244
245int amdgpu_si_read_smc_sram_dword(struct amdgpu_device *adev, u32 smc_address,
246 u32 *value, u32 limit)
247{
248 unsigned long flags;
249 int ret;
250
251 spin_lock_irqsave(&adev->smc_idx_lock, flags);
252 ret = si_set_smc_sram_address(adev, smc_address, limit);
253 if (ret == 0)
254 *value = RREG32(SMC_IND_DATA_0);
255 spin_unlock_irqrestore(&adev->smc_idx_lock, flags);
256
257 return ret;
258}
259
260int amdgpu_si_write_smc_sram_dword(struct amdgpu_device *adev, u32 smc_address,
261 u32 value, u32 limit)
262{
263 unsigned long flags;
264 int ret;
265
266 spin_lock_irqsave(&adev->smc_idx_lock, flags);
267 ret = si_set_smc_sram_address(adev, smc_address, limit);
268 if (ret == 0)
269 WREG32(SMC_IND_DATA_0, value);
270 spin_unlock_irqrestore(&adev->smc_idx_lock, flags);
271
272 return ret;
273}
274