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authorGeorge Sapountzis <gsap7@yahoo.gr>2006-10-02 06:13:38 +0300
committerGeorge Sapountzis <gsap7@yahoo.gr>2006-10-02 22:47:26 +0300
commitc9e3aa961eb90265ec024ff57013786e4d47d0e7 (patch)
tree459349e8afc6ece0ed0f383417ca06fb279ddc7f /linux-core/Doxyfile
parentf3deef730d52c94ce21ada7e4ceb63aa28a8601b (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.
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