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authorChris Wilson <chris@chris-wilson.co.uk>2017-02-03 00:04:38 +0300
committerDaniel Vetter <daniel.vetter@ffwll.ch>2017-02-03 13:10:32 +0300
commit4e64e5539d152e202ad6eea2b6f65f3ab58d9428 (patch)
tree14f90fc609bef7c9e51c6e218cff06062f4f8d6a /drivers/gpu/drm/drm_vma_manager.c
parent17aad8a340e6f98b62c2482d02bc3814eebde9a5 (diff)
downloadlinux-4e64e5539d152e202ad6eea2b6f65f3ab58d9428.tar.xz
drm: Improve drm_mm search (and fix topdown allocation) with rbtrees
The drm_mm range manager claimed to support top-down insertion, but it was neither searching for the top-most hole that could fit the allocation request nor fitting the request to the hole correctly. In order to search the range efficiently, we create a secondary index for the holes using either their size or their address. This index allows us to find the smallest hole or the hole at the bottom or top of the range efficiently, whilst keeping the hole stack to rapidly service evictions. v2: Search for holes both high and low. Rename flags to mode. v3: Discover rb_entry_safe() and use it! v4: Kerneldoc for enum drm_mm_insert_mode. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: "Christian König" <christian.koenig@amd.com> Cc: David Airlie <airlied@linux.ie> Cc: Russell King <rmk+kernel@armlinux.org.uk> Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Sean Paul <seanpaul@chromium.org> Cc: Lucas Stach <l.stach@pengutronix.de> Cc: Christian Gmeiner <christian.gmeiner@gmail.com> Cc: Rob Clark <robdclark@gmail.com> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Stephen Warren <swarren@wwwdotorg.org> Cc: Alexandre Courbot <gnurou@gmail.com> Cc: Eric Anholt <eric@anholt.net> Cc: Sinclair Yeh <syeh@vmware.com> Cc: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Sinclair Yeh <syeh@vmware.com> # vmwgfx Reviewed-by: Lucas Stach <l.stach@pengutronix.de> #etnaviv Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20170202210438.28702-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/drm_vma_manager.c')
-rw-r--r--drivers/gpu/drm/drm_vma_manager.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_vma_manager.c b/drivers/gpu/drm/drm_vma_manager.c
index 20cc33d1bfc1..d9100b565198 100644
--- a/drivers/gpu/drm/drm_vma_manager.c
+++ b/drivers/gpu/drm/drm_vma_manager.c
@@ -212,8 +212,7 @@ int drm_vma_offset_add(struct drm_vma_offset_manager *mgr,
goto out_unlock;
}
- ret = drm_mm_insert_node(&mgr->vm_addr_space_mm, &node->vm_node,
- pages, 0, DRM_MM_SEARCH_DEFAULT);
+ ret = drm_mm_insert_node(&mgr->vm_addr_space_mm, &node->vm_node, pages);
if (ret)
goto out_unlock;