diff options
author | Alex Waterman <alexw@nvidia.com> | 2014-12-11 14:33:52 -0500 |
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committer | Dan Willemsen <dwillemsen@nvidia.com> | 2015-04-04 21:02:38 -0400 |
commit | a99bbc5f6070a346006cf3f63e7f5f2120f30a2f (patch) | |
tree | d400d071aee0404aa1dca924b1e554c173d11735 /include/uapi/linux/nvgpu.h | |
parent | edaf6188d54683bd955f1dc6673b3bb3ba18367e (diff) |
gpu: nvgpu: make larger address space work
Implement several fixes for allowing the GVA address space to grow
to larger than 32GB and increase the address space to 128GB.
o Implement dynamic allocation of PDE backing pages. The memory
to store the PDE entries was hard coded to 1 page. Now the
number of pages necessary is computed dynamically based on the
size of the address space and the size of large pages.
o Fix an arithmetic problem in the gm20b sparse texture code
that caused large address spaces to be truncated when sparse
PDEs/PTEs were being filled in. This caused a kernel panic
when freeing the address space since a lot of the backing
PTE memory was not allocated.
o Change the address space split for large and small pages. Small
pages now occupy the bottom 16GB of the address space. Large
pages are used for the rest of the address space. Now, with a
128GB address space, there are 112GB of large page GVA available.
This patch exists to allow large (16GB) sparse textures to be allocated
without running into lack of memory issues and kernel panics.
Bug 1574267
Change-Id: I7c59ee54bd573dfc53b58c346156df37a85dfc22
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/671204
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>
Diffstat (limited to 'include/uapi/linux/nvgpu.h')
0 files changed, 0 insertions, 0 deletions