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drm/xe/rtp: Add support for matching platform-level stepping

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Add support for matching platform-level stepping, which will be used for
an upcoming NVL-P workaround.

As support for reading platform-level stepping information is added only
as needed in the driver, add a warning when the rule finds a STEP_NONE
value, which is an indication that the driver is missing such a support.

Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patch.msgid.link/20260309-extra-nvl-p-enabling-patches-v5-4-be9c902ee34e@intel.com
Signed-off-by: Gustavo Sousa <gustavo.sousa@intel.com>
This commit is contained in:
Gustavo Sousa 2026-03-09 21:42:09 -03:00
parent 19da26bce0
commit 557c05034f
3 changed files with 28 additions and 0 deletions
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7
drivers/gpu/drm/xe/xe_rtp.c
View File

@ -55,6 +55,13 @@ static bool rule_matches(const struct xe_device *xe,
match = xe->info.platform == r->platform &&
xe->info.subplatform == r->subplatform;
break;
case XE_RTP_MATCH_PLATFORM_STEP:
if (drm_WARN_ON(&xe->drm, xe->info.step.platform == STEP_NONE))
return false;
match = xe->info.step.platform >= r->step_start &&
xe->info.step.platform < r->step_end;
break;
case XE_RTP_MATCH_GRAPHICS_VERSION:
if (drm_WARN_ON(&xe->drm, !gt))
return false;

20
drivers/gpu/drm/xe/xe_rtp.h
View File

@ -35,6 +35,10 @@ struct xe_reg_sr;
{ .match_type = XE_RTP_MATCH_SUBPLATFORM, \
.platform = plat__, .subplatform = sub__ }
#define _XE_RTP_RULE_PLATFORM_STEP(start__, end__) \
{ .match_type = XE_RTP_MATCH_PLATFORM_STEP, \
.step_start = start__, .step_end = end__ }
#define _XE_RTP_RULE_GRAPHICS_STEP(start__, end__) \
{ .match_type = XE_RTP_MATCH_GRAPHICS_STEP, \
.step_start = start__, .step_end = end__ }
@ -66,6 +70,22 @@ struct xe_reg_sr;
#define XE_RTP_RULE_SUBPLATFORM(plat_, sub_) \
_XE_RTP_RULE_SUBPLATFORM(XE_##plat_, XE_SUBPLATFORM_##plat_##_##sub_)
/**
* XE_RTP_RULE_PLATFORM_STEP - Create rule matching platform-level stepping
* @start_: First stepping matching the rule
* @end_: First stepping that does not match the rule
*
* Note that the range matching this rule is [ @start_, @end_ ), i.e. inclusive
* on the left, exclusive on the right.
*
* You need to make sure that proper support for reading platform-level stepping
* information is present for the target platform before using this rule.
*
* Refer to XE_RTP_RULES() for expected usage.
*/
#define XE_RTP_RULE_PLATFORM_STEP(start_, end_) \
_XE_RTP_RULE_PLATFORM_STEP(STEP_##start_, STEP_##end_)
/**
* XE_RTP_RULE_GRAPHICS_STEP - Create rule matching graphics stepping
* @start_: First stepping matching the rule

1
drivers/gpu/drm/xe/xe_rtp_types.h
View File

@ -41,6 +41,7 @@ struct xe_rtp_action {
enum {
XE_RTP_MATCH_PLATFORM,
XE_RTP_MATCH_SUBPLATFORM,
XE_RTP_MATCH_PLATFORM_STEP,
XE_RTP_MATCH_GRAPHICS_VERSION,
XE_RTP_MATCH_GRAPHICS_VERSION_RANGE,
XE_RTP_MATCH_GRAPHICS_VERSION_ANY_GT,