This is a note to let you know that I've just added the patch titled
drm/i915/xelpmp: Consider GSI offset when doing MCR lookups
to the 6.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-i915-xelpmp-consider-gsi-offset-when-doing-mcr-l.patch
and it can be found in the queue-6.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 819bb412c9eb27fcf2dd69d9d1f94d7c19785d07
Author: Matt Roper <matthew.d.roper@xxxxxxxxx>
Date: Mon Feb 13 16:19:06 2023 -0800
drm/i915/xelpmp: Consider GSI offset when doing MCR lookups
[ Upstream commit 33c25354939099b76ecb6c82d1c7c50400fbcca6 ]
MCR range tables use the final MMIO offset of a register (including the
0x380000 GSI offset when applicable). Since the i915_mcr_reg_t passed
as a parameter during steering lookup does not include the GSI offset,
we need to add it back in for GSI registers before searching the tables.
Fixes: a7ec65fc7e83 ("drm/i915/xelpmp: Add multicast steering for media GT")
Signed-off-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
Reviewed-by: Radhakrishna Sripada <radhakrishna.sripada@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20230214001906.1477370-1-matthew.d.roper@xxxxxxxxx
(cherry picked from commit d6683bbe70d4cdbf3da6acecf7d569cc6f0b4382)
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_mcr.c b/drivers/gpu/drm/i915/gt/intel_gt_mcr.c
index 58ea3325bbdaa..fa2b9c48f39b2 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_mcr.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt_mcr.c
@@ -464,12 +464,15 @@ static bool reg_needs_read_steering(struct intel_gt *gt,
i915_mcr_reg_t reg,
enum intel_steering_type type)
{
- const u32 offset = i915_mmio_reg_offset(reg);
+ u32 offset = i915_mmio_reg_offset(reg);
const struct intel_mmio_range *entry;
if (likely(!gt->steering_table[type]))
return false;
+ if (IS_GSI_REG(offset))
+ offset += gt->uncore->gsi_offset;
+
for (entry = gt->steering_table[type]; entry->end; entry++) {
if (offset >= entry->start && offset <= entry->end)
return true;
