Chris Wilson 920cf41949 drm/i915: Introduce an internal allocator for disposable private objects ... Quite a few of our objects used for internal hardware programming do not benefit from being swappable or from being zero initialised. As such they do not benefit from using a shmemfs backing storage and since they are internal and never directly exposed to the user, we do not need to worry about providing a filp. For these we can use an drm_i915_gem_object wrapper around a sg_table of plain struct page. They are not swap backed and not automatically pinned. If they are reaped by the shrinker, the pages are released and the contents discarded. For the internal use case, this is fine as for example, ringbuffers are pinned from being written by a request to be read by the hardware. Once they are idle, they can be discarded entirely. As such they are a good match for execlist ringbuffers and a small variety of other internal objects. In the first iteration, this is limited to the scratch batch buffers we use (for command parsing and state initialisation). v2: Allocate physically contiguous pages, where possible. v3: Reduce maximum order on subsequent requests following an allocation failure. v4: Fix up mismatch between swiotlb segment size and page count (it counts in 2k units, not 4k pages) Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20161028125858.23563-7-chris@chris-wilson.co.uk		2016-10-28 20:53:44 +01:00
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drm	drm/i915: Introduce an internal allocator for disposable private objects	2016-10-28 20:53:44 +01:00
host1x
ipu-v3	gpu: Remove depends on RESET_CONTROLLER when not a provider	2016-10-19 09:26:15 +02:00
vga	drivers/gpu/vga: allocate vga_arb_write() buffer on stack	2016-10-17 08:21:14 +02:00
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