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