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authorKenneth Graunke <kenneth@whitecape.org>2014-01-13 14:14:36 -0800
committerKenneth Graunke <kenneth@whitecape.org>2014-01-20 10:58:15 -0800
commitedf17dbdaa525fe3a9abbbfafa768c556cfd7af2 (patch)
treeadd03522798900453e62a21d6a61f85197f3ef59 /libkms
parent02f93c21e6e1c3dad9d99349989daa84a8c0b5fb (diff)
intel: Create a new drm_intel_bo offset64 field.
The existing 'offset' field is unfortunately typed as 'unsigned long', which is unfortunately only 4 bytes with a 32-bit userspace. Traditionally, the hardware has only supported 32-bit virtual addresses, so even though the kernel uses a __u64, the value would always fit. However, Broadwell supports 48-bit addressing. So with a 64-bit kernel, the card virtual address may be too large to fit in the 'offset' field. Ideally, we would change the type of 'offset' to be a uint64_t---but this would break the libdrm ABI. Instead, we create a new 'offset64' field to hold the full 64-bit value from the kernel, and store the 32-bit truncation in the existing 'offset' field, for compatibility. Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Eric Anholt <eric@anholt.net> Reviewed-by: Ben Widawsky <ben@bwidawsk.net> Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Diffstat (limited to 'libkms')
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