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040ac32048
linux/drivers/char/drm
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Thomas Hellstrom 040ac32048 drm: fix driver deadlock with AIGLX and reclaim_buffers_locked 
Bugzilla Bug #9457

Add refcounting of user waiters to the DRM hardware lock, so that we can use
DRM_LOCK_CONT flag more conservatively.

Also add a kernel waiter refcount that if nonzero transfers the lock for the
kernel context when it is released. This is useful when waiting for idle and can be used for very simple fence object driver implementations for the new memory manager

Signed-off-by: Dave Airlie <airlied@linux.ie>
2007-03-23 13:28:33 +11:00
..
ati_pcigart.c drm: ati_pcigart: simplify page_count manipulations 2006-01-25 14:58:58 +11:00
drm_agpsupport.c drm: possible cleanups 2006-04-23 18:26:40 +10:00
drm_auth.c drm: fix return value in auth function 2006-09-22 05:32:32 +10:00
drm_bufs.c drm: bring bufs code from git tree. 2007-03-11 12:07:17 +11:00
drm_context.c sem2mutex: drivers/char/drm/ 2006-02-02 19:37:46 +11:00
drm_core.h drm: add support for secondary vertical blank interrupt to DRM core 2006-12-07 15:53:28 +11:00
drm_dma.c drm: fixup PCI DMA support 2006-03-19 18:56:12 +11:00
drm_drawable.c drm: drm_rmdraw: Declare id and idx as signed so testing for < 0 works as intended. 2006-12-07 15:53:29 +11:00
drm_drv.c drm: allow for more generic drm ioctls 2007-03-19 08:52:17 +11:00
drm_fops.c drm: fix driver deadlock with AIGLX and reclaim_buffers_locked 2007-03-23 13:28:33 +11:00
drm_hashtab.c drm: add missing NULL assignment 2007-03-11 12:07:17 +11:00
drm_hashtab.h drm: port over use_vmalloc code from git hashtab 2007-03-11 12:07:17 +11:00
drm_ioc32.c [PATCH] struct path: convert drm 2006-12-08 08:28:44 -08:00
drm_ioctl.c drm: fixup setversion return codes.. 2006-09-22 05:32:33 +10:00
drm_irq.c drm: fix driver deadlock with AIGLX and reclaim_buffers_locked 2007-03-23 13:28:33 +11:00
drm_lock.c drm: fix driver deadlock with AIGLX and reclaim_buffers_locked 2007-03-23 13:28:33 +11:00
drm_memory_debug.h drm: remove drm_ioremap and drm_ioremapfree 2007-02-08 13:24:26 +11:00
drm_memory.c drm: remove drm_ioremap and drm_ioremapfree 2007-02-08 13:24:26 +11:00
drm_memory.h drm: remove drm_ioremap and drm_ioremapfree 2007-02-08 13:24:26 +11:00
drm_mm.c drm: remove unused exports 2007-03-11 12:07:16 +11:00
drm_os_linux.h IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
drm_pci.c drm: drm_pci needs dma-mapping.h 2006-04-05 18:12:18 +10:00
drm_pciids.h via: fix CX700 pci id 2007-03-11 12:08:18 +11:00
drm_proc.c drm: Use ARRAY_SIZE macro when appropriate 2007-03-11 12:07:16 +11:00
drm_sarea.h drm: lindent the drm directory. 2005-09-25 14:28:13 +10:00
drm_scatter.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
drm_sman.c drm: update core memory manager from git drm tree 2007-02-08 13:24:26 +11:00
drm_sman.h drm: remove FALSE/TRUE that snuck in with simple memory manager changes. 2006-09-22 05:32:32 +10:00
drm_stub.c drm: fix driver deadlock with AIGLX and reclaim_buffers_locked 2007-03-23 13:28:33 +11:00
drm_sysfs.c drm: fix return value check 2006-12-11 18:28:45 +11:00
drm_vm.c drm: make drm_io_prot static. 2007-03-11 12:08:15 +11:00
drm.h drm: allow for more generic drm ioctls 2007-03-19 08:52:17 +11:00
drmP.h drm: fix driver deadlock with AIGLX and reclaim_buffers_locked 2007-03-23 13:28:33 +11:00
ffb_context.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
ffb_drv.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
ffb_drv.h drm: lindent the drm directory. 2005-09-25 14:28:13 +10:00
i810_dma.c [PATCH] mark struct file_operations const 3 2007-02-12 09:48:45 -08:00
i810_drm.h drm: lindent the drm directory. 2005-09-25 14:28:13 +10:00
i810_drv.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
i810_drv.h i810/i830: use drm_core_ioremap instead of drm_ioremap 2007-02-08 13:24:26 +11:00
i830_dma.c [PATCH] mark struct file_operations const 3 2007-02-12 09:48:45 -08:00
i830_drm.h drm: lindent the drm directory. 2005-09-25 14:28:13 +10:00
i830_drv.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
i830_drv.h i810/i830: use drm_core_ioremap instead of drm_ioremap 2007-02-08 13:24:26 +11:00
i830_irq.c drm: lindent the drm directory. 2005-09-25 14:28:13 +10:00
i915_dma.c drm: i915: Add ioctl for scheduling buffer swaps at vertical blanks. 2006-12-07 15:53:29 +11:00
i915_drm.h drm: i915: Add SAREA fileds for determining which pipe to sync window buffer swaps to. 2006-12-07 15:53:30 +11:00
i915_drv.c drm: add support for secondary vertical blank interrupt to i915 2006-12-07 15:53:28 +11:00
i915_drv.h drm: i915 updates 2006-12-07 15:53:31 +11:00
i915_ioc32.c [PATCH] struct path: convert drm 2006-12-08 08:28:44 -08:00
i915_irq.c i915: Fix a DRM_ERROR that should be DRM_DEBUG. 2007-01-08 20:38:34 +11:00
i915_mem.c drm: i915 patches from Tungsten Graphics 2006-01-25 15:31:43 +11:00
Kconfig drm: add better explanation for i830/i915 2006-09-22 05:32:32 +10:00
Makefile drm: add drm simple memory manager support for SiS and VIA drivers 2006-09-22 05:32:31 +10:00
mga_dma.c drm: update mga driver for new bootstrap code 2005-11-11 23:11:34 +11:00
mga_drm.h drm: lindent the drm directory. 2005-09-25 14:28:13 +10:00
mga_drv.c drm: mga: set dev_priv_size 2006-10-24 21:52:23 +10:00
mga_drv.h drm: update mga driver for new bootstrap code 2005-11-11 23:11:34 +11:00
mga_ioc32.c [PATCH] struct path: convert drm 2006-12-08 08:28:44 -08:00
mga_irq.c drm: lindent the drm directory. 2005-09-25 14:28:13 +10:00
mga_state.c drm: move ioctl flags to a bit field of flags 2006-01-02 13:54:04 +11:00
mga_ucode.h drm: lindent the drm directory. 2005-09-25 14:28:13 +10:00
mga_warp.c drm: lindent the drm directory. 2005-09-25 14:28:13 +10:00
r128_cce.c drm: update PCIGART support from CVS 2006-01-02 17:18:39 +11:00
r128_drm.h drm: r128: comment aligment with drm git 2006-12-19 17:56:14 +11:00
r128_drv.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
r128_drv.h drm: r128: comment aligment with drm git 2006-12-19 17:56:14 +11:00
r128_ioc32.c [PATCH] struct path: convert drm 2006-12-08 08:28:44 -08:00
r128_irq.c drm: update PCIGART support from CVS 2006-01-02 17:18:39 +11:00
r128_state.c drm: r128: comment aligment with drm git 2006-12-19 17:56:14 +11:00
r300_cmdbuf.c drm: Unify radeon offset checking. 2006-12-15 18:54:35 +11:00
r300_reg.h drm: update r300 register names 2006-03-19 19:12:10 +11:00
radeon_cp.c drm/radeon: Fix u32 overflows when determining AGP base address in card space. 2007-03-11 12:07:17 +11:00
radeon_drm.h drm: update radeon to 1.25 add r200 vertex program support 2006-06-24 17:32:10 +10:00
radeon_drv.c drm: use radeon specific names for radeon flags 2006-09-22 05:32:34 +10:00
radeon_drv.h drm: Unify radeon offset checking. 2006-12-15 18:54:35 +11:00
radeon_ioc32.c [PATCH] struct path: convert drm 2006-12-08 08:28:44 -08:00
radeon_irq.c drm: fixup comment header style 2006-12-19 17:49:08 +11:00
radeon_mem.c drm: fixup comment header style 2006-12-19 17:49:08 +11:00
radeon_state.c drm: Unify radeon offset checking. 2006-12-15 18:54:35 +11:00
README.drm drm: update README.drm (bugzilla #7933) 2007-03-11 12:07:16 +11:00
savage_bci.c drm: savage: compat fix from drm git. 2006-12-19 17:20:02 +11:00
savage_drm.h drm: lindent the drm directory. 2005-09-25 14:28:13 +10:00
savage_drv.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
savage_drv.h drm: drivers/char/drm/: make some functions static 2006-02-02 19:21:38 +11:00
savage_state.c fix return code in error case. 2006-10-25 09:40:40 -07:00
sis_drm.h drm: bring sis + tdfx up to latest CVS 2006-01-02 14:44:12 +11:00
sis_drv.c drm: fix driver deadlock with AIGLX and reclaim_buffers_locked 2007-03-23 13:28:33 +11:00
sis_drv.h drm: SiS 315 Awareness. 2006-09-22 05:32:31 +10:00
sis_mm.c drm: cleanups 2006-09-22 05:32:33 +10:00
tdfx_drv.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
tdfx_drv.h drm: bring sis + tdfx up to latest CVS 2006-01-02 14:44:12 +11:00
via_3d_reg.h drm: lindent the drm directory. 2005-09-25 14:28:13 +10:00
via_dma.c drm/via: Disable AGP DMA for chips with the new 3D engine. 2007-02-08 13:24:26 +11:00
via_dmablit.c [PATCH] Char: timers cleanup 2007-02-12 09:48:30 -08:00
via_dmablit.h drm: fix warning on alpha 2006-01-10 19:53:54 +11:00
via_drm.h drm: realign via driver with drm git tree 2006-09-22 05:32:33 +10:00
via_drv.c drm: fix driver deadlock with AIGLX and reclaim_buffers_locked 2007-03-23 13:28:33 +11:00
via_drv.h via: allow for npot texture pitch alignment 2007-02-08 13:24:25 +11:00
via_irq.c via: add some new chipsets 2007-02-08 13:24:25 +11:00
via_map.c via: add some new chipsets 2007-02-08 13:24:25 +11:00
via_mm.c drm: realign via driver with drm git tree 2006-09-22 05:32:33 +10:00
via_verifier.c via: allow for npot texture pitch alignment 2007-02-08 13:24:25 +11:00
via_verifier.h via: allow for npot texture pitch alignment 2007-02-08 13:24:25 +11:00
via_video.c drm: update VIA driver to 2.7.2 2005-11-12 21:52:46 +11:00

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