1 /* 2 * Copyright 2019 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 <linux/pci.h> 24 25 #include "amdgpu.h" 26 #include "amdgpu_i2c.h" 27 #include "smu_v11_0_i2c.h" 28 #include "atom.h" 29 #include "amdgpu_fru_eeprom.h" 30 #include "amdgpu_eeprom.h" 31 32 #define FRU_EEPROM_MADDR 0x60000 33 #define I2C_PRODUCT_INFO_OFFSET 0xC0 34 35 static bool is_fru_eeprom_supported(struct amdgpu_device *adev) 36 { 37 /* Only server cards have the FRU EEPROM 38 * TODO: See if we can figure this out dynamically instead of 39 * having to parse VBIOS versions. 40 */ 41 struct atom_context *atom_ctx = adev->mode_info.atom_context; 42 43 /* VBIOS is of the format ###-DXXXYY-##. For SKU identification, 44 * we can use just the "DXXX" portion. If there were more models, we 45 * could convert the 3 characters to a hex integer and use a switch 46 * for ease/speed/readability. For now, 2 string comparisons are 47 * reasonable and not too expensive 48 */ 49 switch (adev->asic_type) { 50 case CHIP_VEGA20: 51 #ifdef notyet 52 /* D161 and D163 are the VG20 server SKUs */ 53 if (strnstr(atom_ctx->vbios_version, "D161", 54 sizeof(atom_ctx->vbios_version)) || 55 strnstr(atom_ctx->vbios_version, "D163", 56 sizeof(atom_ctx->vbios_version))) 57 return true; 58 else 59 #endif 60 return false; 61 default: 62 return false; 63 } 64 } 65 66 static int amdgpu_fru_read_eeprom(struct amdgpu_device *adev, uint32_t addrptr, 67 unsigned char *buff) 68 { 69 int ret, size; 70 71 ret = amdgpu_eeprom_read(&adev->pm.smu_i2c, addrptr, buff, 1); 72 if (ret < 1) { 73 DRM_WARN("FRU: Failed to get size field"); 74 return ret; 75 } 76 77 /* The size returned by the i2c requires subtraction of 0xC0 since the 78 * size apparently always reports as 0xC0+actual size. 79 */ 80 size = buff[0] - I2C_PRODUCT_INFO_OFFSET; 81 82 ret = amdgpu_eeprom_read(&adev->pm.smu_i2c, addrptr + 1, buff, size); 83 if (ret < 1) { 84 DRM_WARN("FRU: Failed to get data field"); 85 return ret; 86 } 87 88 return size; 89 } 90 91 int amdgpu_fru_get_product_info(struct amdgpu_device *adev) 92 { 93 unsigned char buff[34]; 94 u32 addrptr; 95 int size, len; 96 97 if (!is_fru_eeprom_supported(adev)) 98 return 0; 99 100 /* If algo exists, it means that the i2c_adapter's initialized */ 101 if (!adev->pm.smu_i2c.algo) { 102 DRM_WARN("Cannot access FRU, EEPROM accessor not initialized"); 103 return -ENODEV; 104 } 105 106 /* There's a lot of repetition here. This is due to the FRU having 107 * variable-length fields. To get the information, we have to find the 108 * size of each field, and then keep reading along and reading along 109 * until we get all of the data that we want. We use addrptr to track 110 * the address as we go 111 */ 112 113 /* The first fields are all of size 1-byte, from 0-7 are offsets that 114 * contain information that isn't useful to us. 115 * Bytes 8-a are all 1-byte and refer to the size of the entire struct, 116 * and the language field, so just start from 0xb, manufacturer size 117 */ 118 addrptr = FRU_EEPROM_MADDR + 0xb; 119 size = amdgpu_fru_read_eeprom(adev, addrptr, buff); 120 if (size < 1) { 121 DRM_ERROR("Failed to read FRU Manufacturer, ret:%d", size); 122 return -EINVAL; 123 } 124 125 /* Increment the addrptr by the size of the field, and 1 due to the 126 * size field being 1 byte. This pattern continues below. 127 */ 128 addrptr += size + 1; 129 size = amdgpu_fru_read_eeprom(adev, addrptr, buff); 130 if (size < 1) { 131 DRM_ERROR("Failed to read FRU product name, ret:%d", size); 132 return -EINVAL; 133 } 134 135 len = size; 136 /* Product name should only be 32 characters. Any more, 137 * and something could be wrong. Cap it at 32 to be safe 138 */ 139 if (len >= sizeof(adev->product_name)) { 140 DRM_WARN("FRU Product Number is larger than 32 characters. This is likely a mistake"); 141 len = sizeof(adev->product_name) - 1; 142 } 143 /* Start at 2 due to buff using fields 0 and 1 for the address */ 144 memcpy(adev->product_name, &buff[2], len); 145 adev->product_name[len] = '\0'; 146 147 addrptr += size + 1; 148 size = amdgpu_fru_read_eeprom(adev, addrptr, buff); 149 if (size < 1) { 150 DRM_ERROR("Failed to read FRU product number, ret:%d", size); 151 return -EINVAL; 152 } 153 154 len = size; 155 /* Product number should only be 16 characters. Any more, 156 * and something could be wrong. Cap it at 16 to be safe 157 */ 158 if (len >= sizeof(adev->product_number)) { 159 DRM_WARN("FRU Product Number is larger than 16 characters. This is likely a mistake"); 160 len = sizeof(adev->product_number) - 1; 161 } 162 memcpy(adev->product_number, &buff[2], len); 163 adev->product_number[len] = '\0'; 164 165 addrptr += size + 1; 166 size = amdgpu_fru_read_eeprom(adev, addrptr, buff); 167 168 if (size < 1) { 169 DRM_ERROR("Failed to read FRU product version, ret:%d", size); 170 return -EINVAL; 171 } 172 173 addrptr += size + 1; 174 size = amdgpu_fru_read_eeprom(adev, addrptr, buff); 175 176 if (size < 1) { 177 DRM_ERROR("Failed to read FRU serial number, ret:%d", size); 178 return -EINVAL; 179 } 180 181 len = size; 182 /* Serial number should only be 16 characters. Any more, 183 * and something could be wrong. Cap it at 16 to be safe 184 */ 185 if (len >= sizeof(adev->serial)) { 186 DRM_WARN("FRU Serial Number is larger than 16 characters. This is likely a mistake"); 187 len = sizeof(adev->serial) - 1; 188 } 189 memcpy(adev->serial, &buff[2], len); 190 adev->serial[len] = '\0'; 191 192 return 0; 193 } 194