Date: Sun, 17 Aug 2014 16:19:54 +0100 (BST) From: Robert Swindells <[email protected]>
On i386, the ioctl() of DRM_RADEON_GEM_MMAP is returning addresses above 4GB which obviously cause drmMap() of them to fail. This isn't obvious to me -- off_t is 64-bit everywhere, and the `addresses' that DRM_RADEON_GEM_MMAP returns are not physical addresses but cookies that correspond to graphics buffers. If drmMap fails, that might mean the mapping between cookies and buffers (the `drm_vma' data structures) is wrong.
