drm/vmwgfx: Introduce a huge page aligning TTM range manager

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Using huge page-table entries requires that the physical address of the
start of a buffer object is huge page size aligned.
Make a special version of the TTM range manager that accomplishes this,
but falls back to a smaller page size alignment (PUD->PMD, PMD->NORMAL)
to avoid eviction.
If other drivers want to use it in the future, it can be made a
TTM generic helper. Note that drivers can force eviction for a certain
alignment by assigning the TTM GPU alignment correspondingly.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: "Jérôme Glisse" <jglisse@redhat.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Thomas Hellstrom (VMware) <thomas_os@shipmail.org>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Acked-by: Christian König <christian.koenig@amd.com>

...

This commit is contained in:

Thomas Hellstrom (VMware) 2020-03-24 18:50:12 +01:00

parent b182341667

commit 7546f7ffdb

3 changed files with 174 additions and 0 deletions

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1

drivers/gpu/drm/vmwgfx/Makefile

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7

drivers/gpu/drm/vmwgfx/vmwgfx_drv.h

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166

drivers/gpu/drm/vmwgfx/vmwgfx_thp.c

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