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path: root/include/drm/drm_mm.h
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2012-07-16drm: Add colouring to the range allocatorChris Wilson
In order to support snoopable memory on non-LLC architectures (so that we can bind vgem objects into the i915 GATT for example), we have to avoid the prefetcher on the GPU from crossing memory domains and so prevent allocation of a snoopable PTE immediately following an uncached PTE. To do that, we need to extend the range allocator with support for tracking and segregating different node colours. This will be used by i915 to segregate memory domains within the GTT. v2: Now with more drm_mm helpers and less driver interference. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Dave Airlie <airlied@redhat.com Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Ben Skeggs <bskeggs@redhat.com> Cc: Jerome Glisse <jglisse@redhat.com> Cc: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@gmail.com>
2011-05-09drm: mm: fix debug outputDaniel Vetter
The looping helper didn't do anything due to a superficial semicolon. Furthermore one of the two dump functions suffered from copy&paste fail. While staring at the code I've also noticed that the replace helper (currently unused) is a bit broken. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
2011-03-31Fix common misspellingsLucas De Marchi
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-02-23drm: mm: add helper to unwind scan stateDaniel Vetter
With the switch to implicit free space accounting one pointer got unused when scanning. Use it to create a single-linked list to ensure correct unwinding of the scan state. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
2011-02-23drm: mm: add api for embedding struct drm_mm_nodeDaniel Vetter
The old api has a two-step process: First search for a suitable free hole, then allocate from that specific hole. No user used this to do anything clever. So drop it for the embeddable variant of the drm_mm api (the old one retains this ability, for the time being). With struct drm_mm_node embedded, we cannot track allocations anymore by checking for a NULL pointer. So keep track of this and add a small helper drm_mm_node_allocated. Also add a function to move allocations between different struct drm_mm_node. v2: Implement suggestions by Chris Wilson. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
2011-02-23drm: mm: track free areas implicitlyDaniel Vetter
The idea is to track free holes implicitly by marking the allocation immediatly preceeding a hole. To avoid an ugly corner case add a dummy head_node to struct drm_mm to track the hole that spans to complete allocation area when the memory manager is empty. To guarantee that there's always a preceeding/following node (that might be marked as hole_follows == 1), move the mm->node_list list_head to the head_node. The main allocator and fair-lru scan code actually becomes simpler. Only the debug code slightly suffers because free areas are no longer explicit. Also add drm_mm_for_each_node (which will be much more useful when struct drm_mm_node is embeddable). Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
2011-02-23drm/nouveau: don't munge in drm_mm internalsDaniel Vetter
Nouveau was checking drm_mm internals on teardown to see whether the memory manager was initialized. Hide these internals in a small inline helper function. Acked-by: Ben Skeggs <bskeggs@redhat.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-10-27drm_mm: add support for range-restricted fair-lru scansDaniel Vetter
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
2010-07-07drm: implement helper functions for scanning lru listDaniel Vetter
These helper functions can be used to efficiently scan lru list for eviction. Eviction becomes a three stage process: 1. Scanning through the lru list until a suitable hole has been found. 2. Scan backwards to restore drm_mm consistency and find out which objects fall into the hole. 3. Evict the objects that fall into the hole. These helper functions don't allocate any memory (at the price of not allowing any other concurrent operations). Hence this can also be used for ttm (which does lru scanning under a spinlock). Evicting objects in this fashion should be more fair than the current approach by i915 (scan the lru for a object large enough to contain the new object). It's also more efficient than the current approach used by ttm (uncoditionally evict objects from the lru until there's enough free space). Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Acked-by: Thomas Hellstrom <thellstrom@vmwgfx.com> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-07-07drm: sane naming for drm_mm.cDaniel Vetter
Yeah, I've kinda noticed that fl_entry is the free stack. Still give it (and the memory node list ml_entry) decent names. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Acked-by: Thomas Hellstrom <thellstrom@vmwgfx.com> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-07-07drm: kill drm_mm_node->privateDaniel Vetter
Only ever assigned, never used. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> [glisse: I will re-add if needed for range-restricted allocations] Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Dave Airlie <airlied@redhat.com>
2009-12-10drm: Add memory manager debug functionJerome Glisse
drm_mm_debug_table will print the memory manager state in table allowing to give a snapshot of the manager at given point in time. Usefull for debugging. Signed-off-by: Jerome Glisse <jglisse@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2009-12-10drm: Add search/get functions to get a block in a specific rangeJerome Glisse
These are required for changes to TTM. Signed-off-by: Jerome Glisse <jglisse@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2009-09-08drm: include seq_file.h for debugfs builds.Dave Airlie
Fixes a warning seen on powerpc. Signed-off-by: Dave Airlie <airlied@redhat.com>
2009-09-02drm/mm: add ability to dump mm lists via debugfsDave Airlie
This adds code to the drm_mm to talk to debugfs, and adds support to radeon to add the VRAM and GTT mm lists to debugfs. I tested with spinlock debugging and it doesn't give out. Signed-off-by: Dave Airlie <airlied@redhat.com>
2009-06-19drm: Apply "Memory fragmentation from lost alignment blocks"Thomas Hellstrom
also for the atomic path by using a common code-path. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2009-06-12drm: Split out the mm declarations in a separate header. Add atomic operations.Jerome Glisse
this is a TTM preparation patch, it rearranges the mm and add operations needed to do mm operations in atomic context. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>