drm/xe/guc_ads: allocate UM queues in a separate BO

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Move the UM queues into a dedicated BO (ads->um_queue_bo) and avoid
CPU memset operations on it, which eliminates the CPU as a potential
cacheline-polluting agent and helps maintain consistency between GAM
writes and GuC reads.

We also need to ensure the base_dpa for the queue is contiguous on hw
where this is used instead of a GGTT address. Another good reason to
split this out to a separate BO.

Fixes: 9c57bc0865 ("drm/xe/lnl: Drop force_probe requirement")
Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: <stable@vger.kernel.org> # v6.12+
Signed-off-by: Jia Yao <jia.yao@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patch.msgid.link/20260804165057.129529-2-jia.yao@intel.com

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Jia Yao 2026-08-04 16:50:55 +00:00 • committed by Matthew Auld

parent 20bc4883c7

commit 6af05de0dc

4 changed files with 83 additions and 32 deletions

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14

drivers/gpu/drm/xe/xe_bo.h

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6

drivers/gpu/drm/xe/xe_guc.c

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90

drivers/gpu/drm/xe/xe_guc_ads.c

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5

drivers/gpu/drm/xe/xe_guc_ads_types.h

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