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| author | George Sapountzis <gsap7@yahoo.gr> | 2006-10-02 06:13:38 +0300 |
|---|---|---|
| committer | George Sapountzis <gsap7@yahoo.gr> | 2006-10-02 22:47:26 +0300 |
| commit | c9e3aa961eb90265ec024ff57013786e4d47d0e7 (patch) | |
| tree | 459349e8afc6ece0ed0f383417ca06fb279ddc7f /linux-core/drm_dma.c | |
| parent | f3deef730d52c94ce21ada7e4ceb63aa28a8601b (diff) | |
Bug 6242: [mach64] Use private DMA buffers, part #4.
mach64_state.c: convert the DRM_MACH64_BLIT ioctl to submit a pointer to
user-space memory rather than a DMA buffer index, similar to DRM_MACH64_VERTEX.
This change allows the DDX to map the DMA buffers read-only and eliminate a
security problem where a client can alter the contents of the DMA buffer after
submission to the DRM.
This change also affects the DRI/DRM interface. Performace-wise, it basically
affects PCI mode where I get a ~12% speedup for some Mesa demos I tested.
This is mainly due to eliminating an ioctl for allocating the DMA buffer.
mach64_dma.c: move the responsibility for allocating memory for the DMA ring
in PCI mode to the DDX.
This change affects the DDX/DRM interface and unifies a couple of PCI/AGP code
paths for ring memory in the DRM.
Bump the mach64 DRM version major and date.
Diffstat (limited to 'linux-core/drm_dma.c')
0 files changed, 0 insertions, 0 deletions