drm/xe/oa/uapi: OA buffer mmap

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Allow the OA buffer to be mmap'd to userspace. This is needed for the MMIO
trigger use case. Even otherwise, with whitelisted OA head/tail ptr
registers, userspace can receive/interpret OA data from the mmap'd buffer
without issuing read()'s on the OA stream fd.

v2: Remove unmap_mapping_range from xe_oa_release (Thomas H)
    Use vm_flags_mod (Umesh)

Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Suggested-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240618014609.3233427-14-ashutosh.dixit@intel.com

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Ashutosh Dixit 2024-06-17 18:46:05 -07:00

parent dd6b4718c3

commit 392bf22238

1 changed files with 46 additions and 0 deletions

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drivers/gpu/drm/xe/xe_oa.c

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