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 34 static bool is_fru_eeprom_supported(struct amdgpu_device *adev) 35 { 36 /* Only server cards have the FRU EEPROM 37 * TODO: See if we can figure this out dynamically instead of 38 * having to parse VBIOS versions. 39 */ 40 struct atom_context *atom_ctx = adev->mode_info.atom_context; 41 42 /* The i2c access is blocked on VF 43 * TODO: Need other way to get the info 44 */ 45 if (amdgpu_sriov_vf(adev)) 46 return false; 47 48 /* VBIOS is of the format ###-DXXXYYYY-##. For SKU identification, 49 * we can use just the "DXXX" portion. If there were more models, we 50 * could convert the 3 characters to a hex integer and use a switch 51 * for ease/speed/readability. For now, 2 string comparisons are 52 * reasonable and not too expensive 53 */ 54 switch (adev->asic_type) { 55 case CHIP_VEGA20: 56 #ifdef notyet 57 /* D161 and D163 are the VG20 server SKUs */ 58 if (strnstr(atom_ctx->vbios_version, "D161", 59 sizeof(atom_ctx->vbios_version)) || 60 strnstr(atom_ctx->vbios_version, "D163", 61 sizeof(atom_ctx->vbios_version))) 62 return true; 63 else 64 #endif 65 return false; 66 case CHIP_ALDEBARAN: 67 /* All Aldebaran SKUs have the FRU */ 68 return true; 69 case CHIP_SIENNA_CICHLID: 70 #ifdef notyet 71 if (strnstr(atom_ctx->vbios_version, "D603", 72 sizeof(atom_ctx->vbios_version))) { 73 if (strnstr(atom_ctx->vbios_version, "D603GLXE", 74 sizeof(atom_ctx->vbios_version))) 75 return false; 76 else 77 return true; 78 } else { 79 return false; 80 } 81 #else 82 return false; 83 #endif 84 default: 85 return false; 86 } 87 } 88 89 static int amdgpu_fru_read_eeprom(struct amdgpu_device *adev, uint32_t addrptr, 90 unsigned char *buf, size_t buf_size) 91 { 92 int ret; 93 u8 size; 94 95 ret = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, addrptr, buf, 1); 96 if (ret < 1) { 97 DRM_WARN("FRU: Failed to get size field"); 98 return ret; 99 } 100 101 /* The size returned by the i2c requires subtraction of 0xC0 since the 102 * size apparently always reports as 0xC0+actual size. 103 */ 104 size = buf[0] & 0x3F; 105 size = min_t(size_t, size, buf_size); 106 107 ret = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, addrptr + 1, 108 buf, size); 109 if (ret < 1) { 110 DRM_WARN("FRU: Failed to get data field"); 111 return ret; 112 } 113 114 return size; 115 } 116 117 int amdgpu_fru_get_product_info(struct amdgpu_device *adev) 118 { 119 unsigned char buf[AMDGPU_PRODUCT_NAME_LEN]; 120 u32 addrptr; 121 int size, len; 122 123 if (!is_fru_eeprom_supported(adev)) 124 return 0; 125 126 /* If algo exists, it means that the i2c_adapter's initialized */ 127 if (!adev->pm.fru_eeprom_i2c_bus || !adev->pm.fru_eeprom_i2c_bus->algo) { 128 DRM_WARN("Cannot access FRU, EEPROM accessor not initialized"); 129 return -ENODEV; 130 } 131 132 /* There's a lot of repetition here. This is due to the FRU having 133 * variable-length fields. To get the information, we have to find the 134 * size of each field, and then keep reading along and reading along 135 * until we get all of the data that we want. We use addrptr to track 136 * the address as we go 137 */ 138 139 /* The first fields are all of size 1-byte, from 0-7 are offsets that 140 * contain information that isn't useful to us. 141 * Bytes 8-a are all 1-byte and refer to the size of the entire struct, 142 * and the language field, so just start from 0xb, manufacturer size 143 */ 144 addrptr = FRU_EEPROM_MADDR + 0xb; 145 size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf)); 146 if (size < 1) { 147 DRM_ERROR("Failed to read FRU Manufacturer, ret:%d", size); 148 return -EINVAL; 149 } 150 151 /* Increment the addrptr by the size of the field, and 1 due to the 152 * size field being 1 byte. This pattern continues below. 153 */ 154 addrptr += size + 1; 155 size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf)); 156 if (size < 1) { 157 DRM_ERROR("Failed to read FRU product name, ret:%d", size); 158 return -EINVAL; 159 } 160 161 len = size; 162 if (len >= AMDGPU_PRODUCT_NAME_LEN) { 163 DRM_WARN("FRU Product Name is larger than %d characters. This is likely a mistake", 164 AMDGPU_PRODUCT_NAME_LEN); 165 len = AMDGPU_PRODUCT_NAME_LEN - 1; 166 } 167 memcpy(adev->product_name, buf, len); 168 adev->product_name[len] = '\0'; 169 170 addrptr += size + 1; 171 size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf)); 172 if (size < 1) { 173 DRM_ERROR("Failed to read FRU product number, ret:%d", size); 174 return -EINVAL; 175 } 176 177 len = size; 178 /* Product number should only be 16 characters. Any more, 179 * and something could be wrong. Cap it at 16 to be safe 180 */ 181 if (len >= sizeof(adev->product_number)) { 182 DRM_WARN("FRU Product Number is larger than 16 characters. This is likely a mistake"); 183 len = sizeof(adev->product_number) - 1; 184 } 185 memcpy(adev->product_number, buf, len); 186 adev->product_number[len] = '\0'; 187 188 addrptr += size + 1; 189 size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf)); 190 191 if (size < 1) { 192 DRM_ERROR("Failed to read FRU product version, ret:%d", size); 193 return -EINVAL; 194 } 195 196 addrptr += size + 1; 197 size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf)); 198 199 if (size < 1) { 200 DRM_ERROR("Failed to read FRU serial number, ret:%d", size); 201 return -EINVAL; 202 } 203 204 len = size; 205 /* Serial number should only be 16 characters. Any more, 206 * and something could be wrong. Cap it at 16 to be safe 207 */ 208 if (len >= sizeof(adev->serial)) { 209 DRM_WARN("FRU Serial Number is larger than 16 characters. This is likely a mistake"); 210 len = sizeof(adev->serial) - 1; 211 } 212 memcpy(adev->serial, buf, len); 213 adev->serial[len] = '\0'; 214 215 return 0; 216 } 217