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modesetting-101
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One of the costs of superioctl has been the need to perform relocations
inside the kernel. The cost of mapping the buffers to the CPU and writing
data is fairly high, especially if those buffers have been mapped and read
by the GPU.
If we assume that buffers don't move around very often, we can have the
client compute the relocations itself using the previous GPU address. When
that object doesn't move, the kernel can skip computing and writing the
updated data.
Here's a patch which adds a new field to struct drm_bo_info_req called
'presumed_offset', and a new DRM_BO_HINT_PRESUMED_OFFSET that is set when
this field has been filled in by the client.
There are two separate optimizations performed when the presumed_offset is
correct:
1. i915_exec_reloc checks to see if all previous buffer offsets were guessed
correctly. If so, there's no need for it to look at *any* of the
relocations for a buffer. When this happens, it skips the whole
relocation process, simply returning success.
2. i915_apply_reloc checks to see if the target buffer offset was guessed
correctly. If so, it skips mapping the relocatee, computing the
relocation and writing the value. If no relocations are needed, the
relocatee should never be mapped to the CPU, and so the kernel shouldn't
need to wait for any fences to pass.
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modesetting-101
Conflicts:
linux-core/drm_drv.c
shared-core/drm.h
shared-core/i915_dma.c
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I'm going to pass back a list of blob ids and lengths in the getproperty.
will need another ioctl to return the blob data as it is variable length.
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This also starts to add blob property support.
someone needs to check this work for other things like ppc/x86 alignment diffs
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so really want to get a list of modes per output not the global hammer list.
also we remove the mode ids and let the user pass back the full mode description
need to fix up add/remove mode for user modes now
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This flag indicates that the driver is responsible for the map.
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This allow the user to retrieve a list of properties for an output.
Properties can either be 32-bit values or an enum with an associated name.
Range properties are to be supported.
This API is probably not all correct, I may make properties part of the general
resource get when I think about it some more.
So basically you can create properties and attached them to whatever outputs you want,
so it should be possible to create some generics and just attach them to every output.
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Conflicts:
linux-core/drmP.h
shared-core/i915_dma.c
shared-core/i915_drm.h
shared-core/radeon_drv.h
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Conflicts:
linux-core/drm_bufs.c
shared-core/i915_dma.c
shared-core/i915_drv.h
shared-core/i915_irq.c
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Kernel "cleanfile" script run.
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Conflicts:
linux-core/Makefile.kernel
linux-core/drm_stub.c
linux-core/i915_drv.c
shared-core/i915_dma.c
shared-core/i915_drv.h
Fixup suspend/resume conflicts (basically use what's in DRM master for now).
Also fix up a few other conflicts that snuck in (i915_dma changes etc.).
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This mapping allows cached objects to be mapped in/out of the TT space
with the appropriate flushing calls.
It should put back the old CACHED functionality for snooped mappings
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Conflicts:
linux-core/Makefile.kernel
linux-core/drm_bo.c
linux-core/drm_objects.h
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Set bo init minor to 0.
Add the version function to header.
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Implement a version check IOCTL for drivers that don't use
drmMMInit from user-space.
Remove the minor check from the kernel code. That's really up
to the driver.
Bump major.
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Add interface entry cleaning a memory type without touching NO_EVICT buffers.
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Fix i915 since last commit.
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Remove need for lock for now.
May create races when we clean memory areas or on takedown.
Needs to be fixed.
Really do a validate on buffer creation in order to avoid problems with
fixed memory buffers.
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set pinning."
This reverts cf2d569daca6954d11a796f4d110148ae2e0c827 commit.
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This reverts e7bfeb3031374653f7e55d67cc1b5c823849359f commit.
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modesetting-101
Conflicts:
linux-core/drm_bo.c
linux-core/drm_objects.h
shared-core/i915_dma.c
shared-core/i915_drv.h
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We now always create a drm_ref_object for user objects and this is then the only
things that holds a reference to the user object. This way unreference on will
destroy the user object when the last drm_ref_object goes way.
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The buffer object type is still tracked internally, but it is no longer
part of the user space visible ioctl interface. If the bo create ioctl
specifies a non-NULL buffer address we assume drm_bo_type_user,
otherwise drm_bo_type_dc. Kernel side allocations call
drm_buffer_object_create() directly and can still specify drm_bo_type_kernel.
Not 100% this makes sense either, but with this patch, the buffer type
is no longer exported and we can clean up the internals later on.
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Conflicts:
linux-core/drm_bo.c
linux-core/drm_fence.c
linux-core/drm_objects.h
shared-core/drm.h
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Conflicts:
linux-core/drmP.h
linux-core/drm_bo.c
linux-core/drm_drv.c
linux-core/drm_objects.h
shared-core/drm.h
shared-core/i915_dma.c
shared-core/i915_drv.h
shared-core/i915_irq.c
Mostly removing typedefs that snuck into the modesetting code and
updating to the latest TTM APIs. As of today, the i915 driver builds,
but there are likely to be problems, so debugging and bugfixes will
come next.
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Modify the TTM backend bind arguments.
Export a number of functions needed for driver-specific super-ioctls.
Add a function to map buffer objects from the kernel, regardless of where they're
currently placed.
A number of error fixes.
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This cleans up the create/validate interfaces for this very uncommon path, and
makes pinned object creation much easier to use for the X Server.
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This might break something, stdint.h inclusion in drm.h maybe required
but I'm not sure yet what platforms have it what ones don't.
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Introduce tile members for future tiled buffer support.
Allow user-space to explicitly define a fence-class.
Remove the implicit fence-class mechanism.
64-bit wide buffer object flag member.
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