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author | Thomas Hellstrom <thomas-at-tungstengraphics-dot-com> | 2008-02-28 13:47:15 +0100 |
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committer | Thomas Hellstrom <thomas-at-tungstengraphics-dot-com> | 2008-02-28 13:47:15 +0100 |
commit | 40c9e6a26dd251fe2bf207bb259ba7e4a7704fbe (patch) | |
tree | a1cb1e00d162d3c7dbf8ba02b8005dbd4fb20948 /shared-core/nv50_instmem.c | |
parent | 72983ff30183745cd96760aa07b857c44daebde7 (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 'shared-core/nv50_instmem.c')
0 files changed, 0 insertions, 0 deletions