// SPDX-License-Identifier: MIT
/*
* Copyright © 2022 Intel Corporation
*/
#include "xe_step.h"
#include <kunit/visibility.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_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[] = {
[0 x0] = { COMMON_STEP(A0) },
[0 x1] = { COMMON_STEP(A0) },
[0 x4] = { COMMON_STEP(B0) },
[0 x8] = { COMMON_STEP(C0) },
[0 xC] = { COMMON_STEP(D0) },
};
static const struct xe_step_info adls_rpls_revids[] = {
[0 x4] = { COMMON_STEP(D0) },
[0 xC] = { COMMON_STEP(D0) },
};
static const struct xe_step_info adlp_revids[] = {
[0 x0] = { COMMON_STEP(A0) },
[0 x4] = { COMMON_STEP(B0) },
[0 x8] = { COMMON_STEP(C0) },
[0 xC] = { COMMON_STEP(C0) },
};
static const struct xe_step_info adlp_rpl_revids[] = {
[0 x4] = { COMMON_STEP(C0) },
};
static const struct xe_step_info adln_revids[] = {
[0 x0] = { COMMON_STEP(A0) },
};
static const struct xe_step_info dg2_g10_revid_step_tbl[] = {
[0 x0] = { COMMON_STEP(A0) },
[0 x1] = { COMMON_STEP(A1) },
[0 x4] = { COMMON_STEP(B0) },
[0 x8] = { COMMON_STEP(C0) },
};
static const struct xe_step_info dg2_g11_revid_step_tbl[] = {
[0 x0] = { COMMON_STEP(A0) },
[0 x4] = { COMMON_STEP(B0) },
[0 x5] = { COMMON_STEP(B1) },
};
static const struct xe_step_info dg2_g12_revid_step_tbl[] = {
[0 x0] = { COMMON_STEP(A0) },
[0 x1] = { COMMON_STEP(A1) },
};
static const struct xe_step_info pvc_revid_step_tbl[] = {
[0 x5] = { .graphics = STEP_B0 },
[0 x6] = { .graphics = STEP_B1 },
[0 x7] = { .graphics = STEP_C0 },
};
static const int pvc_basedie_subids[] = {
[0 x3] = STEP_B0,
[0 x4] = STEP_B1,
[0 x5] = STEP_B3,
};
__diag_pop();
/**
* 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 .
*/
struct xe_step_info xe_step_pre_gmdid_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_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)
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;
}
}
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;
}
/**
* 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 .
*/
struct xe_step_info xe_step_gmdid_get(struct xe_device *xe,
u32 graphics_gmdid_revid,
u32 media_gmdid_revid)
{
struct xe_step_info step = {
.graphics = STEP_A0 + graphics_gmdid_revid,
.media = STEP_A0 + media_gmdid_revid,
};
if (step.graphics >= STEP_FUTURE) {
step.graphics = STEP_FUTURE;
drm_dbg(&xe->drm, "Graphics GMD_ID revid value %d treated as future stepping\n" ,
graphics_gmdid_revid);
}
if (step.media >= STEP_FUTURE) {
step.media = STEP_FUTURE;
drm_dbg(&xe->drm, "Media GMD_ID revid value %d treated as future stepping\n" ,
media_gmdid_revid);
}
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 "**" ;
}
}
EXPORT_SYMBOL_IF_KUNIT(xe_step_name);
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