drm/radeon: implement simple doorbell page allocator

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The doorbell aperture is a PCI BAR whose pages can be
mapped to compute resources for things like wptrs
for userspace queues.

This patch maps the BAR and sets up a simple allocator
to allocate pages from the BAR.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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This commit is contained in:

Alex Deucher 2013-03-04 12:47:46 -05:00

parent f93bdefe62

commit 75efdee11b

3 changed files with 153 additions and 0 deletions

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38

drivers/gpu/drm/radeon/cik.c

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21

drivers/gpu/drm/radeon/radeon.h

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94

drivers/gpu/drm/radeon/radeon_device.c

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