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There are a bunch of places in GL where if we can't do this we have to
flush the batchbuffer, and the cost of lookups here is outweighed by flush
savings.
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This wraps the new DRM_IOCTL_I915_GET_PIPE_FROM_CRTC_ID ioctl,
allowing applications to discover the pipe number corresponding
to a given CRTC ID. This is necessary for doing pipe-specific
operations such as waiting for vblank on a given CRTC.
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Scanout buffers need to be freed through the kernel as it holds a reference
to them; exposing this API allows applications allocating scanout buffers to
flag them as not reusable.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
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libdrm has some support for GTT mapping already, but there are bugs
with it (no surprise since it hasn't been used much).
In fixing 20803, I found that sharing bo_gem->virtual was a bad idea,
since a previously mapped object might not end up getting GTT mapped,
leading to corruption. So this patch splits the fields according to
use, taking care to unmap both at free time (but preserving the map
caching).
There's still a risk we might run out of mappings (there's a sysctl
tunable for max number of mappings per process, defaulted to 64k or so
it looks like) but at least GTT maps will work with these changes (and
some others for fixing PAT breakage in the kernel).
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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This avoids using the oldest BO in the BO cache and waiting for it to be
idle before we turn around and render to it with the GPU. Thanks to
Chris Wilson for pointing out how silly we were being.
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Add mode setting files to libdrm, including xf86drmMode.* and the new
drm_mode.h header. Also add a couple of tests to sanity check the
kernel interfaces and update code to support them.
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This reverts commit 6656db10551bbb8770dd945b6d81d5138521f208.
We really just want the libdrm and ioctl bits, not all the driver
stuff.
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This function can also serve the role that the bo_wait_rendering did, when
write_enable is unset.
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Conflicts:
libdrm/Makefile.am
libdrm/intel/intel_bufmgr.h
libdrm/intel/intel_bufmgr_fake.c
libdrm/intel/intel_bufmgr_gem.c
shared-core/drm.h
shared-core/i915_dma.c
shared-core/i915_irq.c
shared-core/radeon_cp.c
shared-core/radeon_drv.h
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Add a drm_intel_gem_bo_map_gtt() function for mapping a buffer object
through the aperture rather than directly to its CPU cacheable memory.
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I wanted to avoid doing this, as it's a bunch of churn, but there was a
conflict between the dri_ symbols in libdrm and the symbols that were in
Mesa in 7.2, which broke Mesa 7.2 AIGLX when the 2D driver had loaded new
libdrm symbols. The new naming was recommended by cworth for giving the
code a unique prefix identifying where the code lives.
Additionally, take the opportunity to fix up two API mistakes: emit_reloc's
arguments were in a nonsensical order, and set_tiling lacked the stride
argument that the kernel will want to use soon. API compatibility with
released code is maintained using #defines.
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We need a way of getting at the underlying handle for use with mode
setting. We can either export it in the dri_bo object or provide a new
callback to get it.
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This avoids duplicating the effort in 3 places. Also, added emit/wait fence
callbacks back in bufmgr_fake since we need it for non-drm 2d. Sigh.
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In the process, work around the glaring bugs of the kernel irq wait function.
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dri_bufmgr.h is replaced by intel_bufmgr.h, and several functions are renamed,
though the structures and many functions remain dri_bufmgr_* and dri_bo_*
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This will be used by the X Server for VT switch.
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