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// SPDX-License-Identifier: MIT
/*
* Copyright © 2022 Intel Corporation
*/
#include "xe_step.h"
#include <linux/bitfield.h>
#include "xe_device.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_GT_MEDIA_STEP(x_) \
.graphics = STEP_##x_, \
.media = STEP_##x_
#define COMMON_STEP(x_) \
COMMON_GT_MEDIA_STEP(x_), \
.graphics = STEP_##x_, \
.media = STEP_##x_, \
.display = 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_GT_MEDIA_STEP(A0), .display = STEP_B0 },
[1] = { COMMON_GT_MEDIA_STEP(B0), .display = STEP_D0 },
};
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_GT_MEDIA_STEP(A0), .display = STEP_A0 },
[0x1] = { COMMON_GT_MEDIA_STEP(A0), .display = STEP_A2 },
[0x4] = { COMMON_GT_MEDIA_STEP(B0), .display = STEP_B0 },
[0x8] = { COMMON_GT_MEDIA_STEP(C0), .display = STEP_B0 },
[0xC] = { COMMON_GT_MEDIA_STEP(D0), .display = STEP_C0 },
};
static const struct xe_step_info dg2_g10_revid_step_tbl[] = {
[0x0] = { COMMON_GT_MEDIA_STEP(A0), .display = STEP_A0 },
[0x1] = { COMMON_GT_MEDIA_STEP(A1), .display = STEP_A0 },
[0x4] = { COMMON_GT_MEDIA_STEP(B0), .display = STEP_B0 },
[0x8] = { COMMON_GT_MEDIA_STEP(C0), .display = STEP_C0 },
};
static const struct xe_step_info dg2_g11_revid_step_tbl[] = {
[0x0] = { COMMON_GT_MEDIA_STEP(A0), .display = STEP_B0 },
[0x4] = { COMMON_GT_MEDIA_STEP(B0), .display = STEP_C0 },
[0x5] = { COMMON_GT_MEDIA_STEP(B1), .display = STEP_C0 },
};
static const struct xe_step_info dg2_g12_revid_step_tbl[] = {
[0x0] = { COMMON_GT_MEDIA_STEP(A0), .display = STEP_C0 },
[0x1] = { COMMON_GT_MEDIA_STEP(A1), .display = STEP_C0 },
};
static const struct xe_step_info pvc_revid_step_tbl[] = {
[0x3] = { .graphics = STEP_A0 },
[0x5] = { .graphics = STEP_B0 },
[0x6] = { .graphics = STEP_B1 },
[0x7] = { .graphics = STEP_C0 },
};
static const int pvc_basedie_subids[] = {
[0x0] = STEP_A0,
[0x3] = STEP_B0,
[0x4] = STEP_B1,
[0x5] = STEP_B3,
};
__diag_pop();
struct xe_step_info xe_step_get(struct xe_device *xe)
{
const struct xe_step_info *revids = NULL;
struct xe_step_info step = {};
u16 revid = xe->info.revid;
int size = 0;
const int *basedie_info = NULL;
int basedie_size = 0;
int baseid = 0;
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_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)
return step;
if (revid < size && revids[revid].graphics != STEP_NONE) {
step = revids[revid];
} 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);
step = revids[revid];
} else {
drm_dbg(&xe->drm, "Using future steppings\n");
step.graphics = STEP_FUTURE;
step.display = STEP_FUTURE;
}
}
drm_WARN_ON(&xe->drm, step.graphics == STEP_NONE);
if (basedie_info && basedie_size) {
if (baseid < basedie_size && basedie_info[baseid] != STEP_NONE) {
step.basedie = basedie_info[baseid];
} else {
drm_warn(&xe->drm, "Unknown baseid 0x%02x\n", baseid);
step.basedie = STEP_FUTURE;
}
}
return step;
}
#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 "**";
}
}
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