linux/drivers/gpu/drm
Jesse Barnes d1d6ca73ef drm/agp/i915: trim stolen space to 32M
Some BIOSes will claim a large chunk of stolen space.  Unless we
reclaim it, our aperture for remapping buffer objects will be
constrained.  So clamp the stolen space to 32M and ignore the rest.

Fixes https://bugzilla.kernel.org/show_bug.cgi?id=15469 among others.

Adding the ignored stolen memory back into the general pool using the
memory hotplug code is left as an exercise for the reader.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Simon Farnsworth <simon.farnsworth@onelan.com>
Tested-by: Artem S. Tashkinov <t.artem@mailcity.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
2010-08-01 19:58:57 -07:00
..
i2c Merge remote branch 'nouveau/for-airlied' of ../drm-nouveau-next into drm-core-next 2010-08-02 10:31:47 +10:00
i810 drm/i810: fixed coding style issues 2010-08-02 10:15:41 +10:00
i830 drm/i830: fixed brace and spacing coding style issues 2010-08-02 10:15:54 +10:00
i915 drm/agp/i915: trim stolen space to 32M 2010-08-01 19:58:57 -07:00
mga drm/mga: fixed brace, macro and spacing coding style issues 2010-08-02 10:17:36 +10:00
nouveau Merge remote branch 'nouveau/for-airlied' of ../drm-nouveau-next into drm-core-next 2010-08-02 10:31:47 +10:00
r128 drm/r128: fixed brace and spacing coding style issues 2010-08-02 10:17:48 +10:00
radeon Merge remote branch 'origin/master' into drm-intel-next 2010-08-01 19:34:47 -07:00
savage drm: Remove drm_resource wrappers 2010-06-01 10:07:24 +10:00
sis drm/sis: fixed brace and spacing coding style issues 2010-08-02 10:18:17 +10:00
tdfx drm: convert drm_ioctl to unlocked_ioctl 2009-12-18 11:22:31 +10:00
ttm Merge tag 'v2.6.35-rc6' into drm-radeon-next 2010-08-02 10:05:24 +10:00
via drm/via: fixed coding style issues, simplified return 2010-08-02 10:17:23 +10:00
vmwgfx Merge branch 'drm-radeon-next' of ../drm-radeon-next into drm-core-next 2010-08-02 10:24:46 +10:00
ati_pcigart.c ati_pcigart: fix printk format warning 2010-02-05 11:46:48 +10:00
drm_agpsupport.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
drm_auth.c drivers/gpu/drm: Use kzalloc 2010-05-18 15:57:05 +10:00
drm_buffer.c drm: Add generic multipart buffer. 2010-02-23 09:46:20 +10:00
drm_bufs.c Merge branch 'drm-platform' into drm-testing 2010-07-07 18:37:35 +10:00
drm_cache.c
drm_context.c
drm_crtc_helper.c drm: unify crtc,connector,encoder,fb debug printing 2010-07-16 11:25:02 +10:00
drm_crtc.c drm: Return EBUSY if the framebuffer is unbound when flipping. 2010-07-21 11:26:07 +10:00
drm_debugfs.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
drm_dma.c drivers/gpu/drm: Use kzalloc 2010-05-18 15:57:05 +10:00
drm_dp_i2c_helper.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
drm_drawable.c
drm_drv.c drm: Free the idr layers before calling idr_destroy() 2010-08-02 10:13:56 +10:00
drm_edid.c Merge remote branch 'origin/master' into drm-intel-next 2010-08-01 19:34:47 -07:00
drm_encoder_slave.c
drm_fb_helper.c drm: correctly update connector DPMS status in drm_fb_helper 2010-07-07 14:21:39 +10:00
drm_fops.c drivers/gpu/drm: Use kzalloc 2010-05-18 15:57:05 +10:00
drm_gem.c drm: Free the idr layers before calling idr_destroy() 2010-08-02 10:13:56 +10:00
drm_hashtab.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
drm_info.c drm: Add support for platform devices to register as DRM devices 2010-06-01 10:07:39 +10:00
drm_ioc32.c drm: convert drm_ioctl to unlocked_ioctl 2009-12-18 11:22:31 +10:00
drm_ioctl.c drm: Add support for platform devices to register as DRM devices 2010-06-01 10:07:39 +10:00
drm_irq.c Merge branch 'drm-tracepoints' into drm-testing 2010-07-07 18:38:44 +10:00
drm_lock.c
drm_memory.c drivers/gpu/drm/drm_memory.c: fix check for end of loop 2010-04-28 18:41:51 +10:00
drm_mm.c drm: implement helper functions for scanning lru list 2010-07-07 12:29:51 +10:00
drm_modes.c drm/edid: Fix sync polarity for secondary GTF curve 2010-04-09 10:05:40 +10:00
drm_pci.c drm: Add support for platform devices to register as DRM devices 2010-06-01 10:07:39 +10:00
drm_platform.c drm: Add support for platform devices to register as DRM devices 2010-06-01 10:07:39 +10:00
drm_proc.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
drm_scatter.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
drm_sman.c
drm_stub.c drm: Free devname along with master->unique 2010-08-02 10:14:30 +10:00
drm_sysfs.c Merge branch 'drm-platform' into drm-testing 2010-07-07 18:37:35 +10:00
drm_trace_points.c drm: add vblank event trace point 2010-07-02 14:02:44 +10:00
drm_trace.h drm: add per-event vblank event trace points 2010-07-02 14:03:24 +10:00
drm_vm.c drm: Add __arm defines to DRM 2010-06-01 10:07:56 +10:00
Kconfig drm/radeon/kms: add support for internal thermal sensors (v3) 2010-08-02 10:00:00 +10:00
Makefile Merge branch 'drm-tracepoints' into drm-testing 2010-07-07 18:38:44 +10:00
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