drm/xe: Rewrite GGTT VF initialization

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The previous code was using a complicated system with 2 balloons to
set GGTT size and adjust GGTT offset. While it works, it's overly
complicated.

A better approach is to set the offset and size when initializing GGTT,
this removes the need for adding balloons. The resize function only
needs readjust ggtt->start to have GGTT at the new offset.

This removes the need to manipulate the internals of xe_ggtt outside
of xe_ggtt, and cleans up a lot of now unneeded code.

Co-developed-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patch.msgid.link/20260206112108.1453809-9-dev@lankhorst.se
Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>

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This commit is contained in:

Maarten Lankhorst 2026-02-06 12:21:11 +01:00

parent 7feebdb041

commit e904c56ba6

5 changed files with 76 additions and 352 deletions

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187

drivers/gpu/drm/xe/xe_ggtt.c

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5

drivers/gpu/drm/xe/xe_ggtt.h

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35

drivers/gpu/drm/xe/xe_gt_sriov_vf.c

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198

drivers/gpu/drm/xe/xe_tile_sriov_vf.c

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3

drivers/gpu/drm/xe/xe_tile_sriov_vf.h

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