linux/drivers/gpu/drm
Daniel Vetter 75e9e9158f drm/i915: kill mappable/fenceable disdinction
a00b10c360 "Only enforce fence limits inside the GTT" also
added a fenceable/mappable disdinction when binding/pinning buffers.
This only complicates the code with no pratical gain:

- In execbuffer this matters on for g33/pineview, as this is the only
  chip that needs fences and has an unmappable gtt area. But fences
  are only possible in the mappable part of the gtt, so need_fence
  implies need_mappable. And need_mappable is only set independantly
  with relocations which implies (for sane userspace) that the buffer
  is untiled.

- The overlay code is only really used on i8xx, which doesn't have
  unmappable gtt. And it doesn't support tiled buffers, currently.

- For all other buffers it's a bug to pass in a tiled bo.

In short, this disdinction doesn't have any practical gain.

I've also reverted mapping the overlay and context pages as possibly
unmappable. It's not worth being overtly clever here, all the big
gains from unmappable are for execbuf bos.

Also add a comment for a clever optimization that confused me
while reading the original patch by Chris Wilson.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
2010-11-04 19:02:03 +00:00
..
i2c drm/i2c/ch7006: Don't use POWER_LEVEL_FULL_POWER_OFF on early chip versions. 2010-08-09 15:16:23 +10:00
i810 Merge branch 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-10-26 18:57:59 -07:00
i830 Merge branch 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-10-26 18:57:59 -07:00
i915 drm/i915: kill mappable/fenceable disdinction 2010-11-04 19:02:03 +00:00
mga Merge branch 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-10-26 18:57:59 -07:00
nouveau Merge branch 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-10-26 18:57:59 -07:00
r128 Merge branch 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-10-26 18:57:59 -07:00
radeon Merge branch 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-10-26 18:57:59 -07:00
savage Merge branch 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-10-26 18:57:59 -07:00
sis Merge branch 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-10-26 18:57:59 -07:00
tdfx Merge branch 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-10-26 18:57:59 -07:00
ttm Merge branch 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-10-26 18:57:59 -07:00
via Merge branch 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-10-26 18:57:59 -07:00
vmwgfx Merge branch 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-10-26 18:57:59 -07:00
ati_pcigart.c drm/radeon: Fix pci_map_page() error checking 2010-08-12 09:38:29 +10:00
drm_agpsupport.c drm: kill agp indirection mess 2010-08-30 09:44:40 +10:00
drm_auth.c drivers/gpu/drm: Use kzalloc 2010-05-18 15:57:05 +10:00
drm_buffer.c drm: fix trivial coding errors 2010-09-24 10:10:23 +10:00
drm_bufs.c DRM: Replace kmalloc/memset combos with kzalloc 2010-08-12 09:12:30 +10:00
drm_cache.c
drm_context.c drm: kill context_ctor callback 2010-08-30 09:38:25 +10:00
drm_crtc_helper.c drm: Use a nondestructive mode for output detect when polling (v2) 2010-09-14 20:38:48 +10:00
drm_crtc.c drm: vmwgfx: Add a struct drm_file parameter to the dirty framebuffer callback 2010-10-06 11:29:41 +10:00
drm_debugfs.c drm: Move the GTT accounting to i915 2010-10-01 14:45:20 +01:00
drm_dma.c drivers/gpu/drm: Use kzalloc 2010-05-18 15:57:05 +10:00
drm_dp_i2c_helper.c
drm_drv.c Merge branch 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-10-26 18:57:59 -07:00
drm_edid_modes.h drm/edid: Split mode lists out to their own header for readability 2010-08-10 10:47:00 +10:00
drm_edid.c drm/edid: add helper function to detect monitor audio capability 2010-10-19 09:17:32 +01:00
drm_encoder_slave.c drm/kms: Simplify setup of the initial I2C encoder config. 2010-08-05 09:37:45 +10:00
drm_fb_helper.c drm, kdb, kms: Change mode_set_base_atomic() enter argument to be an enum 2010-10-19 14:13:33 +10:00
drm_fops.c Merge remote branch 'nouveau/for-airlied' of /ssd/git/drm-nouveau-next into drm-fixes 2010-08-27 09:09:46 +10:00
drm_gem.c Merge remote branch 'korg/drm-fixes' into drm-vmware-next 2010-10-06 11:10:48 +10:00
drm_global.c drm: move ttm global code to core drm 2010-08-04 09:46:06 +10:00
drm_hashtab.c
drm_info.c Merge remote branch 'korg/drm-fixes' into drm-vmware-next 2010-10-06 11:10:48 +10:00
drm_ioc32.c
drm_ioctl.c drm: Fix support for PCI domains 2010-08-10 08:20:20 +10:00
drm_irq.c Merge branch 'drm-tracepoints' into drm-testing 2010-07-07 18:38:44 +10:00
drm_lock.c drm: readd drm_lock_free in drm_unlock 2010-09-26 13:35:49 +10:00
drm_memory.c drm: kill agp indirection mess 2010-08-30 09:44:40 +10:00
drm_mm.c drm_mm: add support for range-restricted fair-lru scans 2010-10-27 23:31:04 +01:00
drm_modes.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-10-24 13:41:39 -07:00
drm_pci.c drm: fix race between driver loading and userspace open. 2010-09-14 20:39:04 +10:00
drm_platform.c drm: fix race between driver loading and userspace open. 2010-09-14 20:39:04 +10:00
drm_proc.c drm: Move the GTT accounting to i915 2010-10-01 14:45:20 +01:00
drm_scatter.c drm: don't export drm_sg_alloc 2010-08-30 09:37:43 +10:00
drm_sman.c
drm_stub.c drm: kill dev->timer 2010-08-30 09:44:54 +10:00
drm_sysfs.c drm: Use a nondestructive mode for output detect when polling 2010-09-13 20:29:11 +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 Merge remote branch 'korg/drm-fixes' into drm-vmware-next 2010-10-06 11:10:48 +10:00
Kconfig BKL: introduce CONFIG_BKL. 2010-10-21 15:44:13 +02:00
Makefile drm: replace drawable ioctl by noops 2010-08-30 09:39:11 +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