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 /* D161 and D163 are the VG20 server SKUs */ 52 if (strnstr(atom_ctx->vbios_version, "D161", 53 sizeof(atom_ctx->vbios_version)) || 54 strnstr(atom_ctx->vbios_version, "D163", 55 sizeof(atom_ctx->vbios_version))) 56 return true; 57 else 58 return false; 59 case CHIP_ALDEBARAN: 60 /* All Aldebaran SKUs have the FRU */ 61 return true; 62 default: 63 return false; 64 } 65 } 66 67 static int amdgpu_fru_read_eeprom(struct amdgpu_device *adev, uint32_t addrptr, 68 unsigned char *buff) 69 { 70 int ret, size; 71 72 ret = amdgpu_eeprom_read(&adev->pm.smu_i2c, addrptr, buff, 1); 73 if (ret < 1) { 74 DRM_WARN("FRU: Failed to get size field"); 75 return ret; 76 } 77 78 /* The size returned by the i2c requires subtraction of 0xC0 since the 79 * size apparently always reports as 0xC0+actual size. 80 */ 81 size = buff[0] - I2C_PRODUCT_INFO_OFFSET; 82 83 ret = amdgpu_eeprom_read(&adev->pm.smu_i2c, addrptr + 1, buff, size); 84 if (ret < 1) { 85 DRM_WARN("FRU: Failed to get data field"); 86 return ret; 87 } 88 89 return size; 90 } 91 92 int amdgpu_fru_get_product_info(struct amdgpu_device *adev) 93 { 94 unsigned char buff[AMDGPU_PRODUCT_NAME_LEN+2]; 95 u32 addrptr; 96 int size, len; 97 int offset = 2; 98 99 if (!is_fru_eeprom_supported(adev)) 100 return 0; 101 102 if (adev->asic_type == CHIP_ALDEBARAN) 103 offset = 0; 104 105 /* If algo exists, it means that the i2c_adapter's initialized */ 106 if (!adev->pm.smu_i2c.algo) { 107 DRM_WARN("Cannot access FRU, EEPROM accessor not initialized"); 108 return -ENODEV; 109 } 110 111 /* There's a lot of repetition here. This is due to the FRU having 112 * variable-length fields. To get the information, we have to find the 113 * size of each field, and then keep reading along and reading along 114 * until we get all of the data that we want. We use addrptr to track 115 * the address as we go 116 */ 117 118 /* The first fields are all of size 1-byte, from 0-7 are offsets that 119 * contain information that isn't useful to us. 120 * Bytes 8-a are all 1-byte and refer to the size of the entire struct, 121 * and the language field, so just start from 0xb, manufacturer size 122 */ 123 addrptr = FRU_EEPROM_MADDR + 0xb; 124 size = amdgpu_fru_read_eeprom(adev, addrptr, buff); 125 if (size < 1) { 126 DRM_ERROR("Failed to read FRU Manufacturer, ret:%d", size); 127 return -EINVAL; 128 } 129 130 /* Increment the addrptr by the size of the field, and 1 due to the 131 * size field being 1 byte. This pattern continues below. 132 */ 133 addrptr += size + 1; 134 size = amdgpu_fru_read_eeprom(adev, addrptr, buff); 135 if (size < 1) { 136 DRM_ERROR("Failed to read FRU product name, ret:%d", size); 137 return -EINVAL; 138 } 139 140 len = size; 141 if (len >= AMDGPU_PRODUCT_NAME_LEN) { 142 DRM_WARN("FRU Product Name is larger than %d characters. This is likely a mistake", 143 AMDGPU_PRODUCT_NAME_LEN); 144 len = AMDGPU_PRODUCT_NAME_LEN - 1; 145 } 146 /* Start at 2 due to buff using fields 0 and 1 for the address */ 147 memcpy(adev->product_name, &buff[offset], len); 148 adev->product_name[len] = '\0'; 149 150 addrptr += size + 1; 151 size = amdgpu_fru_read_eeprom(adev, addrptr, buff); 152 if (size < 1) { 153 DRM_ERROR("Failed to read FRU product number, ret:%d", size); 154 return -EINVAL; 155 } 156 157 len = size; 158 /* Product number should only be 16 characters. Any more, 159 * and something could be wrong. Cap it at 16 to be safe 160 */ 161 if (len >= sizeof(adev->product_number)) { 162 DRM_WARN("FRU Product Number is larger than 16 characters. This is likely a mistake"); 163 len = sizeof(adev->product_number) - 1; 164 } 165 memcpy(adev->product_number, &buff[offset], len); 166 adev->product_number[len] = '\0'; 167 168 addrptr += size + 1; 169 size = amdgpu_fru_read_eeprom(adev, addrptr, buff); 170 171 if (size < 1) { 172 DRM_ERROR("Failed to read FRU product version, ret:%d", size); 173 return -EINVAL; 174 } 175 176 addrptr += size + 1; 177 size = amdgpu_fru_read_eeprom(adev, addrptr, buff); 178 179 if (size < 1) { 180 DRM_ERROR("Failed to read FRU serial number, ret:%d", size); 181 return -EINVAL; 182 } 183 184 len = size; 185 /* Serial number should only be 16 characters. Any more, 186 * and something could be wrong. Cap it at 16 to be safe 187 */ 188 if (len >= sizeof(adev->serial)) { 189 DRM_WARN("FRU Serial Number is larger than 16 characters. This is likely a mistake"); 190 len = sizeof(adev->serial) - 1; 191 } 192 memcpy(adev->serial, &buff[offset], len); 193 adev->serial[len] = '\0'; 194 195 return 0; 196 } 197