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