drm/amdkfd: Add kfd gtt sub-allocator functions

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This patch adds new kfd gtt sub-allocator functions that service the amdkfd
driver when it wants to use gtt memory.

The sub-allocator uses a bitmap to handle the memory area that was transferred
to it during init. It divides the memory area into chunks, according to chunk
size parameter.

The allocation function will allocate contiguous chunks from that memory area,
according to the requested size. If the requested size is smaller than the
chunk size, a single chunk will be allocated.

v2: Do some more verifications on parameters that are passed into
kfd_gtt_sa_init()

Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
Reviewed-by: Alexey Skidanov <Alexey.skidanov@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

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This commit is contained in:

Oded Gabbay 2014-10-27 14:36:07 +02:00

parent 36b5c08f09

commit 6e81090b2e

2 changed files with 193 additions and 0 deletions

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186

drivers/gpu/drm/amd/amdkfd/kfd_device.c

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7

drivers/gpu/drm/amd/amdkfd/kfd_priv.h

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