// SPDX-License-Identifier: MIT /* * Copyright © 2022 Intel Corporation */ #include "xe_step.h" #include #include #include #include "xe_device_types.h" #include "xe_platform_types.h" /* * Provide mapping between PCI's revision ID to the individual GMD * (Graphics/Media/Display) stepping values that can be compared numerically. * * Some platforms may have unusual ways of mapping PCI revision ID to GMD * steppings. E.g., in some cases a higher PCI revision may translate to a * lower stepping of the GT and/or display IP. * * Also note that some revisions/steppings may have been set aside as * placeholders but never materialized in real hardware; in those cases there * may be jumps in the revision IDs or stepping values in the tables below. */ /* * Some platforms always have the same stepping value for GT and display; * use a macro to define these to make it easier to identify the platforms * where the two steppings can deviate. */ #define COMMON_STEP(x_) \ .graphics = STEP_##x_, \ .media = STEP_##x_ __diag_push(); __diag_ignore_all("-Woverride-init", "Allow field overrides in table"); /* Same GT stepping between tgl_uy_revids and tgl_revids don't mean the same HW */ static const struct xe_step_info tgl_revids[] = { [0] = { COMMON_STEP(A0) }, [1] = { COMMON_STEP(B0) }, }; static const struct xe_step_info dg1_revids[] = { [0] = { COMMON_STEP(A0) }, [1] = { COMMON_STEP(B0) }, }; static const struct xe_step_info adls_revids[] = { [0x0] = { COMMON_STEP(A0) }, [0x1] = { COMMON_STEP(A0) }, [0x4] = { COMMON_STEP(B0) }, [0x8] = { COMMON_STEP(C0) }, [0xC] = { COMMON_STEP(D0) }, }; static const struct xe_step_info adls_rpls_revids[] = { [0x4] = { COMMON_STEP(D0) }, [0xC] = { COMMON_STEP(D0) }, }; static const struct xe_step_info adlp_revids[] = { [0x0] = { COMMON_STEP(A0) }, [0x4] = { COMMON_STEP(B0) }, [0x8] = { COMMON_STEP(C0) }, [0xC] = { COMMON_STEP(C0) }, }; static const struct xe_step_info adlp_rpl_revids[] = { [0x4] = { COMMON_STEP(C0) }, }; static const struct xe_step_info adln_revids[] = { [0x0] = { COMMON_STEP(A0) }, }; static const struct xe_step_info dg2_g10_revid_step_tbl[] = { [0x0] = { COMMON_STEP(A0) }, [0x1] = { COMMON_STEP(A1) }, [0x4] = { COMMON_STEP(B0) }, [0x8] = { COMMON_STEP(C0) }, }; static const struct xe_step_info dg2_g11_revid_step_tbl[] = { [0x0] = { COMMON_STEP(A0) }, [0x4] = { COMMON_STEP(B0) }, [0x5] = { COMMON_STEP(B1) }, }; static const struct xe_step_info dg2_g12_revid_step_tbl[] = { [0x0] = { COMMON_STEP(A0) }, [0x1] = { COMMON_STEP(A1) }, }; static const struct xe_step_info pvc_revid_step_tbl[] = { [0x5] = { .graphics = STEP_B0 }, [0x6] = { .graphics = STEP_B1 }, [0x7] = { .graphics = STEP_C0 }, }; static const int pvc_basedie_subids[] = { [0x3] = STEP_B0, [0x4] = STEP_B1, [0x5] = STEP_B3, }; __diag_pop(); /** * xe_step_platform_get - Determine platform-level stepping from PCI revid * @xe: Xe device * * Convert the PCI revid into a platform-level stepping value and store that * in the device info. */ void xe_step_platform_get(struct xe_device *xe) { /* * Not all platforms map PCI revid directly into our symbolic stepping * enumeration. Some platforms will have a single PCI revid used for a * range platform level steppings and some might even require specific * mappings. So prefer to err on the side of caution and include only * the platforms from which we need the stepping info for workaround * checks. */ if (xe->info.platform == XE_NOVALAKE_P) xe->info.step.platform = STEP_A0 + xe->info.revid; } /** * xe_step_pre_gmdid_get - Determine IP steppings from PCI revid * @xe: Xe device * * Convert the PCI revid into proper IP steppings. This should only be * used on platforms that do not have GMD_ID support. */ void xe_step_pre_gmdid_get(struct xe_device *xe) { const struct xe_step_info *revids = NULL; u16 revid = xe->info.revid; int size = 0; const int *basedie_info = NULL; int basedie_size = 0; int baseid = 0; u8 graphics = STEP_NONE; u8 media = STEP_NONE; u8 basedie = STEP_NONE; if (xe->info.platform == XE_PVC) { baseid = FIELD_GET(GENMASK(5, 3), xe->info.revid); revid = FIELD_GET(GENMASK(2, 0), xe->info.revid); revids = pvc_revid_step_tbl; size = ARRAY_SIZE(pvc_revid_step_tbl); basedie_info = pvc_basedie_subids; basedie_size = ARRAY_SIZE(pvc_basedie_subids); } else if (xe->info.subplatform == XE_SUBPLATFORM_DG2_G10) { revids = dg2_g10_revid_step_tbl; size = ARRAY_SIZE(dg2_g10_revid_step_tbl); } else if (xe->info.subplatform == XE_SUBPLATFORM_DG2_G11) { revids = dg2_g11_revid_step_tbl; size = ARRAY_SIZE(dg2_g11_revid_step_tbl); } else if (xe->info.subplatform == XE_SUBPLATFORM_DG2_G12) { revids = dg2_g12_revid_step_tbl; size = ARRAY_SIZE(dg2_g12_revid_step_tbl); } else if (xe->info.platform == XE_ALDERLAKE_N) { revids = adln_revids; size = ARRAY_SIZE(adln_revids); } else if (xe->info.subplatform == XE_SUBPLATFORM_ALDERLAKE_S_RPLS) { revids = adls_rpls_revids; size = ARRAY_SIZE(adls_rpls_revids); } else if (xe->info.subplatform == XE_SUBPLATFORM_ALDERLAKE_P_RPLU) { revids = adlp_rpl_revids; size = ARRAY_SIZE(adlp_rpl_revids); } else if (xe->info.platform == XE_ALDERLAKE_P) { revids = adlp_revids; size = ARRAY_SIZE(adlp_revids); } else if (xe->info.platform == XE_ALDERLAKE_S) { revids = adls_revids; size = ARRAY_SIZE(adls_revids); } else if (xe->info.platform == XE_DG1) { revids = dg1_revids; size = ARRAY_SIZE(dg1_revids); } else if (xe->info.platform == XE_TIGERLAKE) { revids = tgl_revids; size = ARRAY_SIZE(tgl_revids); } /* Not using the stepping scheme for the platform yet. */ if (!revids) goto done; if (revid < size && revids[revid].graphics != STEP_NONE) { graphics = revids[revid].graphics; media = revids[revid].media; basedie = revids[revid].basedie; } else { drm_warn(&xe->drm, "Unknown revid 0x%02x\n", revid); /* * If we hit a gap in the revid array, use the information for * the next revid. * * This may be wrong in all sorts of ways, especially if the * steppings in the array are not monotonically increasing, but * it's better than defaulting to 0. */ while (revid < size && revids[revid].graphics == STEP_NONE) revid++; if (revid < size) { drm_dbg(&xe->drm, "Using steppings for revid 0x%02x\n", revid); graphics = revids[revid].graphics; media = revids[revid].media; basedie = revids[revid].basedie; } else { drm_dbg(&xe->drm, "Using future steppings\n"); graphics = STEP_FUTURE; } } drm_WARN_ON(&xe->drm, graphics == STEP_NONE); if (basedie_info && basedie_size) { if (baseid < basedie_size && basedie_info[baseid] != STEP_NONE) { basedie = basedie_info[baseid]; } else { drm_warn(&xe->drm, "Unknown baseid 0x%02x\n", baseid); basedie = STEP_FUTURE; } } done: xe->info.step.graphics = graphics; xe->info.step.media = media; xe->info.step.basedie = basedie; } /** * xe_step_gmdid_get - Determine IP steppings from GMD_ID revid fields * @xe: Xe device * @graphics_gmdid_revid: value of graphics GMD_ID register's revid field * @media_gmdid_revid: value of media GMD_ID register's revid field * * Convert the revid fields of the GMD_ID registers into proper IP steppings. * * GMD_ID revid values are currently expected to have consistent meanings on * all platforms: major steppings (A0, B0, etc.) are 4 apart, with minor * steppings (A1, A2, etc.) taking the values in between. */ void xe_step_gmdid_get(struct xe_device *xe, u32 graphics_gmdid_revid, u32 media_gmdid_revid) { u8 graphics = STEP_A0 + graphics_gmdid_revid; u8 media = STEP_A0 + media_gmdid_revid; if (graphics >= STEP_FUTURE) { graphics = STEP_FUTURE; drm_dbg(&xe->drm, "Graphics GMD_ID revid value %d treated as future stepping\n", graphics_gmdid_revid); } if (media >= STEP_FUTURE) { media = STEP_FUTURE; drm_dbg(&xe->drm, "Media GMD_ID revid value %d treated as future stepping\n", media_gmdid_revid); } xe->info.step.graphics = graphics; xe->info.step.media = media; } #define STEP_NAME_CASE(name) \ case STEP_##name: \ return #name; const char *xe_step_name(enum xe_step step) { switch (step) { STEP_NAME_LIST(STEP_NAME_CASE); default: return "**"; } } EXPORT_SYMBOL_IF_KUNIT(xe_step_name);