1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright © 2022 Intel Corporation 4 */ 5 6 #include "xe_step.h" 7 8 #include <linux/bitfield.h> 9 10 #include "xe_device.h" 11 #include "xe_platform_types.h" 12 13 /* 14 * Provide mapping between PCI's revision ID to the individual GMD 15 * (Graphics/Media/Display) stepping values that can be compared numerically. 16 * 17 * Some platforms may have unusual ways of mapping PCI revision ID to GMD 18 * steppings. E.g., in some cases a higher PCI revision may translate to a 19 * lower stepping of the GT and/or display IP. 20 * 21 * Also note that some revisions/steppings may have been set aside as 22 * placeholders but never materialized in real hardware; in those cases there 23 * may be jumps in the revision IDs or stepping values in the tables below. 24 */ 25 26 /* 27 * Some platforms always have the same stepping value for GT and display; 28 * use a macro to define these to make it easier to identify the platforms 29 * where the two steppings can deviate. 30 */ 31 #define COMMON_GT_MEDIA_STEP(x_) \ 32 .graphics = STEP_##x_, \ 33 .media = STEP_##x_ 34 35 #define COMMON_STEP(x_) \ 36 COMMON_GT_MEDIA_STEP(x_), \ 37 .graphics = STEP_##x_, \ 38 .media = STEP_##x_, \ 39 .display = STEP_##x_ 40 41 __diag_push(); 42 __diag_ignore_all("-Woverride-init", "Allow field overrides in table"); 43 44 /* Same GT stepping between tgl_uy_revids and tgl_revids don't mean the same HW */ 45 static const struct xe_step_info tgl_revids[] = { 46 [0] = { COMMON_GT_MEDIA_STEP(A0), .display = STEP_B0 }, 47 [1] = { COMMON_GT_MEDIA_STEP(B0), .display = STEP_D0 }, 48 }; 49 50 static const struct xe_step_info dg1_revids[] = { 51 [0] = { COMMON_STEP(A0) }, 52 [1] = { COMMON_STEP(B0) }, 53 }; 54 55 static const struct xe_step_info adls_revids[] = { 56 [0x0] = { COMMON_GT_MEDIA_STEP(A0), .display = STEP_A0 }, 57 [0x1] = { COMMON_GT_MEDIA_STEP(A0), .display = STEP_A2 }, 58 [0x4] = { COMMON_GT_MEDIA_STEP(B0), .display = STEP_B0 }, 59 [0x8] = { COMMON_GT_MEDIA_STEP(C0), .display = STEP_B0 }, 60 [0xC] = { COMMON_GT_MEDIA_STEP(D0), .display = STEP_C0 }, 61 }; 62 63 static const struct xe_step_info adlp_revids[] = { 64 [0x0] = { COMMON_GT_MEDIA_STEP(A0), .display = STEP_A0 }, 65 [0x4] = { COMMON_GT_MEDIA_STEP(B0), .display = STEP_B0 }, 66 [0x8] = { COMMON_GT_MEDIA_STEP(C0), .display = STEP_C0 }, 67 [0xC] = { COMMON_GT_MEDIA_STEP(C0), .display = STEP_D0 }, 68 }; 69 70 static const struct xe_step_info adlp_rpl_revids[] = { 71 [0x4] = { COMMON_GT_MEDIA_STEP(C0), .display = STEP_E0 }, 72 }; 73 74 static const struct xe_step_info adln_revids[] = { 75 [0x0] = { COMMON_GT_MEDIA_STEP(A0), .display = STEP_D0 }, 76 }; 77 78 static const struct xe_step_info dg2_g10_revid_step_tbl[] = { 79 [0x0] = { COMMON_GT_MEDIA_STEP(A0), .display = STEP_A0 }, 80 [0x1] = { COMMON_GT_MEDIA_STEP(A1), .display = STEP_A0 }, 81 [0x4] = { COMMON_GT_MEDIA_STEP(B0), .display = STEP_B0 }, 82 [0x8] = { COMMON_GT_MEDIA_STEP(C0), .display = STEP_C0 }, 83 }; 84 85 static const struct xe_step_info dg2_g11_revid_step_tbl[] = { 86 [0x0] = { COMMON_GT_MEDIA_STEP(A0), .display = STEP_B0 }, 87 [0x4] = { COMMON_GT_MEDIA_STEP(B0), .display = STEP_C0 }, 88 [0x5] = { COMMON_GT_MEDIA_STEP(B1), .display = STEP_C0 }, 89 }; 90 91 static const struct xe_step_info dg2_g12_revid_step_tbl[] = { 92 [0x0] = { COMMON_GT_MEDIA_STEP(A0), .display = STEP_C0 }, 93 [0x1] = { COMMON_GT_MEDIA_STEP(A1), .display = STEP_C0 }, 94 }; 95 96 static const struct xe_step_info pvc_revid_step_tbl[] = { 97 [0x5] = { .graphics = STEP_B0 }, 98 [0x6] = { .graphics = STEP_B1 }, 99 [0x7] = { .graphics = STEP_C0 }, 100 }; 101 102 static const int pvc_basedie_subids[] = { 103 [0x3] = STEP_B0, 104 [0x4] = STEP_B1, 105 [0x5] = STEP_B3, 106 }; 107 108 __diag_pop(); 109 110 /** 111 * xe_step_pre_gmdid_get - Determine IP steppings from PCI revid 112 * @xe: Xe device 113 * 114 * Convert the PCI revid into proper IP steppings. This should only be 115 * used on platforms that do not have GMD_ID support. 116 */ 117 struct xe_step_info xe_step_pre_gmdid_get(struct xe_device *xe) 118 { 119 const struct xe_step_info *revids = NULL; 120 struct xe_step_info step = {}; 121 u16 revid = xe->info.revid; 122 int size = 0; 123 const int *basedie_info = NULL; 124 int basedie_size = 0; 125 int baseid = 0; 126 127 if (xe->info.platform == XE_PVC) { 128 baseid = FIELD_GET(GENMASK(5, 3), xe->info.revid); 129 revid = FIELD_GET(GENMASK(2, 0), xe->info.revid); 130 revids = pvc_revid_step_tbl; 131 size = ARRAY_SIZE(pvc_revid_step_tbl); 132 basedie_info = pvc_basedie_subids; 133 basedie_size = ARRAY_SIZE(pvc_basedie_subids); 134 } else if (xe->info.subplatform == XE_SUBPLATFORM_DG2_G10) { 135 revids = dg2_g10_revid_step_tbl; 136 size = ARRAY_SIZE(dg2_g10_revid_step_tbl); 137 } else if (xe->info.subplatform == XE_SUBPLATFORM_DG2_G11) { 138 revids = dg2_g11_revid_step_tbl; 139 size = ARRAY_SIZE(dg2_g11_revid_step_tbl); 140 } else if (xe->info.subplatform == XE_SUBPLATFORM_DG2_G12) { 141 revids = dg2_g12_revid_step_tbl; 142 size = ARRAY_SIZE(dg2_g12_revid_step_tbl); 143 } else if (xe->info.platform == XE_ALDERLAKE_N) { 144 revids = adln_revids; 145 size = ARRAY_SIZE(adln_revids); 146 } else if (xe->info.subplatform == XE_SUBPLATFORM_ALDERLAKE_P_RPLU) { 147 revids = adlp_rpl_revids; 148 size = ARRAY_SIZE(adlp_rpl_revids); 149 } else if (xe->info.platform == XE_ALDERLAKE_P) { 150 revids = adlp_revids; 151 size = ARRAY_SIZE(adlp_revids); 152 } else if (xe->info.platform == XE_ALDERLAKE_S) { 153 revids = adls_revids; 154 size = ARRAY_SIZE(adls_revids); 155 } else if (xe->info.platform == XE_DG1) { 156 revids = dg1_revids; 157 size = ARRAY_SIZE(dg1_revids); 158 } else if (xe->info.platform == XE_TIGERLAKE) { 159 revids = tgl_revids; 160 size = ARRAY_SIZE(tgl_revids); 161 } 162 163 /* Not using the stepping scheme for the platform yet. */ 164 if (!revids) 165 return step; 166 167 if (revid < size && revids[revid].graphics != STEP_NONE) { 168 step = revids[revid]; 169 } else { 170 drm_warn(&xe->drm, "Unknown revid 0x%02x\n", revid); 171 172 /* 173 * If we hit a gap in the revid array, use the information for 174 * the next revid. 175 * 176 * This may be wrong in all sorts of ways, especially if the 177 * steppings in the array are not monotonically increasing, but 178 * it's better than defaulting to 0. 179 */ 180 while (revid < size && revids[revid].graphics == STEP_NONE) 181 revid++; 182 183 if (revid < size) { 184 drm_dbg(&xe->drm, "Using steppings for revid 0x%02x\n", 185 revid); 186 step = revids[revid]; 187 } else { 188 drm_dbg(&xe->drm, "Using future steppings\n"); 189 step.graphics = STEP_FUTURE; 190 step.display = STEP_FUTURE; 191 } 192 } 193 194 drm_WARN_ON(&xe->drm, step.graphics == STEP_NONE); 195 196 if (basedie_info && basedie_size) { 197 if (baseid < basedie_size && basedie_info[baseid] != STEP_NONE) { 198 step.basedie = basedie_info[baseid]; 199 } else { 200 drm_warn(&xe->drm, "Unknown baseid 0x%02x\n", baseid); 201 step.basedie = STEP_FUTURE; 202 } 203 } 204 205 return step; 206 } 207 208 /** 209 * xe_step_gmdid_get - Determine IP steppings from GMD_ID revid fields 210 * @xe: Xe device 211 * @graphics_gmdid_revid: value of graphics GMD_ID register's revid field 212 * @media_gmdid_revid: value of media GMD_ID register's revid field 213 * 214 * Convert the revid fields of the GMD_ID registers into proper IP steppings. 215 * 216 * GMD_ID revid values are currently expected to have consistent meanings on 217 * all platforms: major steppings (A0, B0, etc.) are 4 apart, with minor 218 * steppings (A1, A2, etc.) taking the values in between. 219 */ 220 struct xe_step_info xe_step_gmdid_get(struct xe_device *xe, 221 u32 graphics_gmdid_revid, 222 u32 media_gmdid_revid) 223 { 224 struct xe_step_info step = { 225 .graphics = STEP_A0 + graphics_gmdid_revid, 226 .media = STEP_A0 + media_gmdid_revid, 227 }; 228 229 if (step.graphics >= STEP_FUTURE) { 230 step.graphics = STEP_FUTURE; 231 drm_dbg(&xe->drm, "Graphics GMD_ID revid value %d treated as future stepping\n", 232 graphics_gmdid_revid); 233 } 234 235 if (step.media >= STEP_FUTURE) { 236 step.media = STEP_FUTURE; 237 drm_dbg(&xe->drm, "Media GMD_ID revid value %d treated as future stepping\n", 238 media_gmdid_revid); 239 } 240 241 return step; 242 } 243 244 #define STEP_NAME_CASE(name) \ 245 case STEP_##name: \ 246 return #name; 247 248 const char *xe_step_name(enum xe_step step) 249 { 250 switch (step) { 251 STEP_NAME_LIST(STEP_NAME_CASE); 252 253 default: 254 return "**"; 255 } 256 } 257