kernel/include/drm/ttm/ttm_page_alloc.h, branch linux-3.0.y

Revert "ttm: Include the 'struct dev' when using the DMA API."

2011-02-23T04:24:01Z

This reverts commit 5a893fc28f0393adb7c885a871b8c59e623fd528. This causes a use after free in the ttm free alloc pages path, when it tries to get the be after the be has been destroyed. Signed-off-by: Dave Airlie

ttm: Include the 'struct dev' when using the DMA API.

2011-02-22T18:26:23Z

This makes the accounting when using 'debug_dma_dump_mappings()' and CONFIG_DMA_API_DEBUG=y be assigned to the correct device instead of 'fallback'. No functional change - just cosmetic. Signed-off-by: Konrad Rzeszutek Wilk

ttm: Introduce a placeholder for DMA (bus) addresses.

2011-01-27T21:02:31Z

This is right now limited to only non-pool constructs. [v2: Fixed indentation issues, add review-by tag] Reviewed-by: Thomas Hellstrom Signed-off-by: Konrad Rzeszutek Wilk Tested-by: Ian Campbell

drm/ttm: Allocate the page pool manager in the heap.

2010-07-07T02:14:11Z

Repeated ttm_page_alloc_init/fini fails noisily because the pool manager kobj isn't zeroed out between uses (we could do just that but statically allocated kobjects are generally considered a bad thing). Move it to kzalloc'ed memory. Note that this patch drops the refcounting behavior of the pool allocator init/fini functions: it would have led to a race condition in its current form, and anyway it was never exploited. This fixes a regression with reloading kms modules at runtime, since page allocator was introduced. Signed-off-by: Francisco Jerez Signed-off-by: Dave Airlie

drm/ttm: Add sysfs interface to control pool allocator.

2010-04-06T01:36:18Z

Sysfs interface allows user to configure pool allocator functionality and change limits for the size of pool. Signed-off-by: Pauli Nieminen Signed-off-by: Dave Airlie

drm/ttm: Add debugfs output entry to pool allocator.

2010-04-06T01:35:45Z

ttm_page_alloc_debugfs can be registered to output the state of pools. Debugfs file will output number of pages freed from the pool, number of pages in pool now and the lowes number of pages in pool since previous shrink. Signed-off-by: Pauli Nieminen Signed-off-by: Dave Airlie

drm/ttm: add pool wc/uc page allocator V3

2010-04-06T01:35:26Z

On AGP system we might allocate/free routinely uncached or wc memory, changing page from cached (wb) to uc or wc is very expensive and involves a lot of flushing. To improve performance this allocator use a pool of uc,wc pages. Pools are protected with spinlocks to allow multiple threads to allocate pages simultanously. Expensive operations are done outside of spinlock to maximize concurrency. Pools are linked lists of pages that were recently freed. mm shrink callback allows kernel to claim back pages when they are required for something else. Fixes: * set_pages_array_wb handles highmem pages so we don't have to remove them from pool. * Add count parameter to ttm_put_pages to avoid looping in free code. * Change looping from _safe to normal in pool fill error path. * Initialize sum variable and make the loop prettier in get_num_unused_pages. * Moved pages_freed reseting inside the loop in ttm_page_pool_free. * Add warning comment about spinlock context in ttm_page_pool_free. Based on Jerome Glisse's and Dave Airlie's pool allocator. Signed-off-by: Jerome Glisse Signed-off-by: Dave Airlie Signed-off-by: Pauli Nieminen Reviewed-by: Jerome Glisse Signed-off-by: Dave Airlie