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41c2e75e60
linux-kernel-test/drivers/gpu/drm
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Benjamin Herrenschmidt 41c2e75e60 drm: Make drm_local_map use a resource_size_t offset 
This changes drm_local_map to use a resource_size for its "offset"
member instead of an unsigned long, thus allowing 32-bit machines
with a >32-bit physical address space to be able to store there
their register or framebuffer addresses when those are above 4G,
such as when using a PCI video card on a recent AMCC 440 SoC.

This patch isn't as "trivial" as it sounds: A few functions needed
to have some unsigned long/int changed to resource_size_t and a few
printk's had to be adjusted.

But also, because userspace isn't capable of passing such offsets,
I had to modify drm_find_matching_map() to ignore the offset passed
in for maps of type _DRM_FRAMEBUFFER or _DRM_REGISTERS.

If we ever support multiple _DRM_FRAMEBUFFER or _DRM_REGISTERS maps
for a given device, we might have to change that trick, but I don't
think that happens on any current driver.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Dave Airlie <airlied@linux.ie>
2009-03-13 14:23:57 +10:00
..
i810 drm: Split drm_map and drm_local_map 2009-03-13 14:23:56 +10:00
i830 drm: Split drm_map and drm_local_map 2009-03-13 14:23:56 +10:00
i915 drm: Split drm_map and drm_local_map 2009-03-13 14:23:56 +10:00
mga drm: Make drm_local_map use a resource_size_t offset 2009-03-13 14:23:57 +10:00
r128 drm: Make drm_local_map use a resource_size_t offset 2009-03-13 14:23:57 +10:00
radeon drm: Make drm_local_map use a resource_size_t offset 2009-03-13 14:23:57 +10:00
savage drm: Use resource_size_t for drm_get_resource_{start, len} 2009-03-13 14:23:56 +10:00
sis SiS DRM: fix a pointer cast warning 2008-10-18 07:10:10 +10:00
tdfx
via drm: move drm vblank initialization/cleanup to driver load/unload 2008-11-25 09:49:03 +10:00
ati_pcigart.c
drm_agpsupport.c drm: stash AGP include under the do-we-have-AGP ifdef 2009-01-22 22:27:11 +10:00
drm_auth.c drm: move to kref per-master structures. 2008-12-29 17:47:22 +10:00
drm_bufs.c drm: Make drm_local_map use a resource_size_t offset 2009-03-13 14:23:57 +10:00
drm_cache.c drm: wbinvd is cache coherent. 2008-10-18 07:10:53 +10:00
drm_context.c drm: Split drm_map and drm_local_map 2009-03-13 14:23:56 +10:00
drm_crtc_helper.c drm: disable encoders before re-routing them 2009-02-25 14:42:23 +10:00
drm_crtc.c drm: Release user fbs in drm_release 2009-02-20 12:21:11 +10:00
drm_dma.c
drm_drawable.c drm: Avoid oops in DRM_IOCTL_RM_DRAW if a bad handle is supplied. 2008-10-23 13:46:54 +10:00
drm_drv.c drm: Split drm_map and drm_local_map 2009-03-13 14:23:56 +10:00
drm_edid.c drm: edid revision 0 is valid 2009-02-25 14:47:05 +10:00
drm_fops.c drm: Avoid client deadlocks when the master disappears. 2009-03-03 09:50:20 +10:00
drm_gem.c drm: Split drm_map and drm_local_map 2009-03-13 14:23:56 +10:00
drm_hashtab.c drm: GEM mmap support 2008-12-29 17:47:22 +10:00
drm_ioc32.c drm: Add 32-bit compatibility for DRM_IOCTL_UPDATE_DRAW. 2008-10-23 13:46:33 +10:00
drm_ioctl.c drm: fix leak of uninitialized data to userspace 2008-12-29 17:47:22 +10:00
drm_irq.c drm: Correct unbalanced drm_vblank_put() during mode setting. 2009-02-25 14:45:50 +10:00
drm_lock.c drm: Avoid client deadlocks when the master disappears. 2009-03-03 09:50:20 +10:00
drm_memory.c drm: Split drm_map and drm_local_map 2009-03-13 14:23:56 +10:00
drm_mm.c DRM: add mode setting support 2008-12-29 17:47:23 +10:00
drm_modes.c DRM: add mode setting support 2008-12-29 17:47:23 +10:00
drm_pci.c
drm_proc.c drm: Make drm_local_map use a resource_size_t offset 2009-03-13 14:23:57 +10:00
drm_scatter.c
drm_sman.c
drm_stub.c drm: fix double lock typo 2009-03-04 21:49:14 +10:00
drm_sysfs.c gpu: struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-06 10:44:41 -08:00
drm_vm.c drm: Make drm_local_map use a resource_size_t offset 2009-03-13 14:23:57 +10:00
Kconfig fbdev/drm: fix Kconfig submenu mess in "Graphics support" 2009-02-18 15:37:56 -08:00
Makefile DRM: add mode setting support 2008-12-29 17:47:23 +10:00
README.drm

README.drm 

************************************************************
* For the very latest on DRI development, please see:      *
*     http://dri.freedesktop.org/                          *
************************************************************

The Direct Rendering Manager (drm) is a device-independent kernel-level
device driver that provides support for the XFree86 Direct Rendering
Infrastructure (DRI).

The DRM supports the Direct Rendering Infrastructure (DRI) in four major
ways:

    1. The DRM provides synchronized access to the graphics hardware via
       the use of an optimized two-tiered lock.

    2. The DRM enforces the DRI security policy for access to the graphics
       hardware by only allowing authenticated X11 clients access to
       restricted regions of memory.

    3. The DRM provides a generic DMA engine, complete with multiple
       queues and the ability to detect the need for an OpenGL context
       switch.

    4. The DRM is extensible via the use of small device-specific modules
       that rely extensively on the API exported by the DRM module.


Documentation on the DRI is available from:
    http://dri.freedesktop.org/wiki/Documentation
    http://sourceforge.net/project/showfiles.php?group_id=387
    http://dri.sourceforge.net/doc/

For specific information about kernel-level support, see:

    The Direct Rendering Manager, Kernel Support for the Direct Rendering
    Infrastructure
    http://dri.sourceforge.net/doc/drm_low_level.html

    Hardware Locking for the Direct Rendering Infrastructure
    http://dri.sourceforge.net/doc/hardware_locking_low_level.html

    A Security Analysis of the Direct Rendering Infrastructure
    http://dri.sourceforge.net/doc/security_low_level.html