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authorThomas Hellstrom <thomas-at-tungstengraphics-dot-com>2008-02-28 13:47:15 +0100
committerThomas Hellstrom <thomas-at-tungstengraphics-dot-com>2008-02-28 13:47:15 +0100
commit40c9e6a26dd251fe2bf207bb259ba7e4a7704fbe (patch)
treea1cb1e00d162d3c7dbf8ba02b8005dbd4fb20948 /libdrm/xf86drm.c
parent72983ff30183745cd96760aa07b857c44daebde7 (diff)
Add a compat kmap_atomic_prot_pfn to do quick kernel map / unmaps of
PCI- or high memory. This is substantially more efficient than drm_bo_kmap, since the mapping only lives on a single processor. Unmapping is done use kunmap_atomic(). Flushes only a single tlb() entry. Add a support utility int drm_bo_pfn_prot() that returns the pfn and desired page protection for a given bo offset. This is all intended for relocations in bound TTMS or vram. Mapping-accessing-unmapping must be atomic, either using preempt_xx() macros or a spinlock.
Diffstat (limited to 'libdrm/xf86drm.c')
0 files changed, 0 insertions, 0 deletions