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