1 /* $NetBSD: amdgpu_si_smc.c,v 1.2 2021/12/18 23:44:58 riastradh Exp $ */ 2 3 /* 4 * Copyright 2011 Advanced Micro Devices, Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: Alex Deucher 25 */ 26 27 #include <sys/cdefs.h> 28 __KERNEL_RCSID(0, "$NetBSD: amdgpu_si_smc.c,v 1.2 2021/12/18 23:44:58 riastradh Exp $"); 29 30 #include <linux/firmware.h> 31 32 #include "amdgpu.h" 33 #include "sid.h" 34 #include "ppsmc.h" 35 #include "amdgpu_ucode.h" 36 #include "sislands_smc.h" 37 38 static int si_set_smc_sram_address(struct amdgpu_device *adev, 39 u32 smc_address, u32 limit) 40 { 41 if (smc_address & 3) 42 return -EINVAL; 43 if ((smc_address + 3) > limit) 44 return -EINVAL; 45 46 WREG32(SMC_IND_INDEX_0, smc_address); 47 WREG32_P(SMC_IND_ACCESS_CNTL, 0, ~AUTO_INCREMENT_IND_0); 48 49 return 0; 50 } 51 52 int amdgpu_si_copy_bytes_to_smc(struct amdgpu_device *adev, 53 u32 smc_start_address, 54 const u8 *src, u32 byte_count, u32 limit) 55 { 56 unsigned long flags; 57 int ret = 0; 58 u32 data, original_data, addr, extra_shift; 59 60 if (smc_start_address & 3) 61 return -EINVAL; 62 if ((smc_start_address + byte_count) > limit) 63 return -EINVAL; 64 65 addr = smc_start_address; 66 67 spin_lock_irqsave(&adev->smc_idx_lock, flags); 68 while (byte_count >= 4) { 69 /* SMC address space is BE */ 70 data = (src[0] << 24) | (src[1] << 16) | (src[2] << 8) | src[3]; 71 72 ret = si_set_smc_sram_address(adev, addr, limit); 73 if (ret) 74 goto done; 75 76 WREG32(SMC_IND_DATA_0, data); 77 78 src += 4; 79 byte_count -= 4; 80 addr += 4; 81 } 82 83 /* RMW for the final bytes */ 84 if (byte_count > 0) { 85 data = 0; 86 87 ret = si_set_smc_sram_address(adev, addr, limit); 88 if (ret) 89 goto done; 90 91 original_data = RREG32(SMC_IND_DATA_0); 92 extra_shift = 8 * (4 - byte_count); 93 94 while (byte_count > 0) { 95 /* SMC address space is BE */ 96 data = (data << 8) + *src++; 97 byte_count--; 98 } 99 100 data <<= extra_shift; 101 data |= (original_data & ~((~0UL) << extra_shift)); 102 103 ret = si_set_smc_sram_address(adev, addr, limit); 104 if (ret) 105 goto done; 106 107 WREG32(SMC_IND_DATA_0, data); 108 } 109 110 done: 111 spin_unlock_irqrestore(&adev->smc_idx_lock, flags); 112 113 return ret; 114 } 115 116 void amdgpu_si_start_smc(struct amdgpu_device *adev) 117 { 118 u32 tmp = RREG32_SMC(SMC_SYSCON_RESET_CNTL); 119 120 tmp &= ~RST_REG; 121 122 WREG32_SMC(SMC_SYSCON_RESET_CNTL, tmp); 123 } 124 125 void amdgpu_si_reset_smc(struct amdgpu_device *adev) 126 { 127 u32 tmp; 128 129 RREG32(CB_CGTT_SCLK_CTRL); 130 RREG32(CB_CGTT_SCLK_CTRL); 131 RREG32(CB_CGTT_SCLK_CTRL); 132 RREG32(CB_CGTT_SCLK_CTRL); 133 134 tmp = RREG32_SMC(SMC_SYSCON_RESET_CNTL) | 135 RST_REG; 136 WREG32_SMC(SMC_SYSCON_RESET_CNTL, tmp); 137 } 138 139 int amdgpu_si_program_jump_on_start(struct amdgpu_device *adev) 140 { 141 static const u8 data[] = { 0x0E, 0x00, 0x40, 0x40 }; 142 143 return amdgpu_si_copy_bytes_to_smc(adev, 0x0, data, 4, sizeof(data)+1); 144 } 145 146 void amdgpu_si_smc_clock(struct amdgpu_device *adev, bool enable) 147 { 148 u32 tmp = RREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0); 149 150 if (enable) 151 tmp &= ~CK_DISABLE; 152 else 153 tmp |= CK_DISABLE; 154 155 WREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0, tmp); 156 } 157 158 bool amdgpu_si_is_smc_running(struct amdgpu_device *adev) 159 { 160 u32 rst = RREG32_SMC(SMC_SYSCON_RESET_CNTL); 161 u32 clk = RREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0); 162 163 if (!(rst & RST_REG) && !(clk & CK_DISABLE)) 164 return true; 165 166 return false; 167 } 168 169 PPSMC_Result amdgpu_si_send_msg_to_smc(struct amdgpu_device *adev, 170 PPSMC_Msg msg) 171 { 172 u32 tmp; 173 int i; 174 175 if (!amdgpu_si_is_smc_running(adev)) 176 return PPSMC_Result_Failed; 177 178 WREG32(SMC_MESSAGE_0, msg); 179 180 for (i = 0; i < adev->usec_timeout; i++) { 181 tmp = RREG32(SMC_RESP_0); 182 if (tmp != 0) 183 break; 184 udelay(1); 185 } 186 187 return (PPSMC_Result)RREG32(SMC_RESP_0); 188 } 189 190 PPSMC_Result amdgpu_si_wait_for_smc_inactive(struct amdgpu_device *adev) 191 { 192 u32 tmp; 193 int i; 194 195 if (!amdgpu_si_is_smc_running(adev)) 196 return PPSMC_Result_OK; 197 198 for (i = 0; i < adev->usec_timeout; i++) { 199 tmp = RREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0); 200 if ((tmp & CKEN) == 0) 201 break; 202 udelay(1); 203 } 204 205 return PPSMC_Result_OK; 206 } 207 208 int amdgpu_si_load_smc_ucode(struct amdgpu_device *adev, u32 limit) 209 { 210 const struct smc_firmware_header_v1_0 *hdr; 211 unsigned long flags; 212 u32 ucode_start_address; 213 u32 ucode_size; 214 const u8 *src; 215 u32 data; 216 217 if (!adev->pm.fw) 218 return -EINVAL; 219 220 hdr = (const struct smc_firmware_header_v1_0 *)adev->pm.fw->data; 221 222 amdgpu_ucode_print_smc_hdr(&hdr->header); 223 224 adev->pm.fw_version = le32_to_cpu(hdr->header.ucode_version); 225 ucode_start_address = le32_to_cpu(hdr->ucode_start_addr); 226 ucode_size = le32_to_cpu(hdr->header.ucode_size_bytes); 227 src = (const u8 *) 228 (adev->pm.fw->data + le32_to_cpu(hdr->header.ucode_array_offset_bytes)); 229 if (ucode_size & 3) 230 return -EINVAL; 231 232 spin_lock_irqsave(&adev->smc_idx_lock, flags); 233 WREG32(SMC_IND_INDEX_0, ucode_start_address); 234 WREG32_P(SMC_IND_ACCESS_CNTL, AUTO_INCREMENT_IND_0, ~AUTO_INCREMENT_IND_0); 235 while (ucode_size >= 4) { 236 /* SMC address space is BE */ 237 data = (src[0] << 24) | (src[1] << 16) | (src[2] << 8) | src[3]; 238 239 WREG32(SMC_IND_DATA_0, data); 240 241 src += 4; 242 ucode_size -= 4; 243 } 244 WREG32_P(SMC_IND_ACCESS_CNTL, 0, ~AUTO_INCREMENT_IND_0); 245 spin_unlock_irqrestore(&adev->smc_idx_lock, flags); 246 247 return 0; 248 } 249 250 int amdgpu_si_read_smc_sram_dword(struct amdgpu_device *adev, u32 smc_address, 251 u32 *value, u32 limit) 252 { 253 unsigned long flags; 254 int ret; 255 256 spin_lock_irqsave(&adev->smc_idx_lock, flags); 257 ret = si_set_smc_sram_address(adev, smc_address, limit); 258 if (ret == 0) 259 *value = RREG32(SMC_IND_DATA_0); 260 spin_unlock_irqrestore(&adev->smc_idx_lock, flags); 261 262 return ret; 263 } 264 265 int amdgpu_si_write_smc_sram_dword(struct amdgpu_device *adev, u32 smc_address, 266 u32 value, u32 limit) 267 { 268 unsigned long flags; 269 int ret; 270 271 spin_lock_irqsave(&adev->smc_idx_lock, flags); 272 ret = si_set_smc_sram_address(adev, smc_address, limit); 273 if (ret == 0) 274 WREG32(SMC_IND_DATA_0, value); 275 spin_unlock_irqrestore(&adev->smc_idx_lock, flags); 276 277 return ret; 278 } 279
Indexes created Sun Sep 21 20:09:37 GMT 2025