linux/drivers/gpu/drm
Chris Wilson aaa0566792 drm/i915: Don't destroy the vma placeholder during execbuffer reservation
The execbuffer handle and exec_link were moved from the object into the
vma. As the vma may be unbound and destroyed whilst attempting to
reserve the execbuffer objects (either through a forced unbind to fix up
a misalignment or through an evict-everything call) we need to prevent
the free of the i915_vma itself. Otherwise not only is the list of
objects to reserve corrupt, but we continue to reference stale vma
entries.

Fixes kernel crash with i-g-t/gem_evict_everything

This regression has been introduced in

commit 04038a515d6eda6dd0857c0ade0b3950d372f4c0
Author:     Ben Widawsky <ben@bwidawsk.net>
AuthorDate: Wed Aug 14 11:38:36 2013 +0200

    drm/i915: Convert execbuf code to use vmas

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
References: http://www.spinics.net/lists/intel-gfx/msg32038.html
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=68298
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2013-09-04 17:34:42 +02:00
..
ast Merge branch 'drm-next-3.12' of git://people.freedesktop.org/~agd5f/linux into drm-next 2013-09-02 09:31:40 +10:00
cirrus Merge branch 'drm-next-3.12' of git://people.freedesktop.org/~agd5f/linux into drm-next 2013-09-02 09:31:40 +10:00
exynos Merge branch 'drm-next-3.12' of git://people.freedesktop.org/~agd5f/linux into drm-next 2013-09-02 09:31:40 +10:00
gma500 Merge branch 'drm-next-3.12' of git://people.freedesktop.org/~agd5f/linux into drm-next 2013-09-02 09:31:40 +10:00
i2c drm/i2c: tda998x: prepare for broken sync workaround 2013-08-19 09:10:48 +10:00
i810 drm: rip out drm_core_has_MTRR checks 2013-08-19 14:11:44 +10:00
i915 drm/i915: Don't destroy the vma placeholder during execbuffer reservation 2013-09-04 17:34:42 +02:00
mga drm: rip out drm_core_has_MTRR checks 2013-08-19 14:11:44 +10:00
mgag200 Merge branch 'drm-next-3.12' of git://people.freedesktop.org/~agd5f/linux into drm-next 2013-09-02 09:31:40 +10:00
msm drm/msm: convert to drm_bridge 2013-09-02 10:23:35 +10:00
nouveau drm/nouveau: Support render nodes 2013-09-02 10:51:47 +10:00
omapdrm drm: Pass page flip ioctl flags to driver 2013-08-30 09:24:54 +10:00
qxl drm: verify vma access in TTM+GEM drivers 2013-08-27 11:54:58 +10:00
r128 drm: rip out drm_core_has_MTRR checks 2013-08-19 14:11:44 +10:00
radeon drm/radeon: support render nodes 2013-09-02 10:51:53 +10:00
rcar-du drm: Pass page flip ioctl flags to driver 2013-08-30 09:24:54 +10:00
savage drm: rip out drm_core_has_MTRR checks 2013-08-19 14:11:44 +10:00
shmobile drm: Pass page flip ioctl flags to driver 2013-08-30 09:24:54 +10:00
sis drm: rip out drm_core_has_MTRR checks 2013-08-19 14:11:44 +10:00
tdfx drm: rip out drm_core_has_MTRR checks 2013-08-19 14:11:44 +10:00
tilcdc drm: Pass page flip ioctl flags to driver 2013-08-30 09:24:54 +10:00
ttm drm/ttm: kill unused functions 2013-08-19 09:36:12 +10:00
udl drm/udl: use gem get/put page helpers 2013-08-19 10:36:12 +10:00
via drm: rip out drm_core_has_MTRR checks 2013-08-19 14:11:44 +10:00
vmwgfx Merge branch 'drm-next-3.12' of git://people.freedesktop.org/~agd5f/linux into drm-next 2013-09-02 09:31:40 +10:00
Kconfig Merge tag 'drm-intel-next-2013-08-23' of git://people.freedesktop.org/~danvet/drm-intel into drm-next 2013-08-30 09:47:41 +10:00
Makefile drm/msm: basic KMS driver for snapdragon 2013-08-24 14:57:07 -04:00
README.drm
ati_pcigart.c
drm_agpsupport.c drm/agp: move AGP cleanup paths to drm_agpsupport.c 2013-08-07 10:14:24 +10:00
drm_auth.c
drm_buffer.c
drm_bufs.c drm: remove the dma_ioctl special-case 2013-08-19 14:15:50 +10:00
drm_cache.c lib/scatterlist: sg_page_iter: support sg lists w/o backing pages 2013-03-27 17:13:44 +01:00
drm_context.c drm: mark context support as a legacy subsystem 2013-08-19 10:04:48 +10:00
drm_crtc.c drm: fix DRM_IOCTL_MODE_GETFB handle-leak 2013-09-02 10:51:36 +10:00
drm_crtc_helper.c drm: Add drm_bridge 2013-09-02 10:23:26 +10:00
drm_debugfs.c
drm_dma.c drm: mark dma setup/teardown as legacy systems 2013-08-19 10:04:21 +10:00
drm_dp_helper.c drm/doc: add new dp helpers into drm DocBook 2012-11-28 20:26:53 +10:00
drm_drv.c drm: implement experimental render nodes 2013-08-30 08:43:57 +10:00
drm_edid.c Merge branch 'drm-next-3.12' of git://people.freedesktop.org/~agd5f/linux into drm-next 2013-09-02 09:31:40 +10:00
drm_edid_load.c drm: avoid warning in drm_load_edid_firmware() 2013-07-10 14:21:46 -07:00
drm_encoder_slave.c drm: refactor call to request_module 2013-05-10 14:46:03 +10:00
drm_fb_cma_helper.c drm: Make drm_fb_cma_describe() static 2013-08-21 12:47:41 +10:00
drm_fb_helper.c drm/fb-helper: Make load_lut and gamma_set/gamma_get hooks optional 2013-06-17 19:42:47 +10:00
drm_flip_work.c drm: add flip-work helper 2013-08-19 10:32:26 +10:00
drm_fops.c drm: implement experimental render nodes 2013-08-30 08:43:57 +10:00
drm_gem.c drm/prime: Remove PRIME handles only if supported 2013-08-30 09:11:59 +10:00
drm_gem_cma_helper.c drm/gem: create drm_gem_dumb_destroy 2013-08-07 09:59:24 +10:00
drm_global.c
drm_hashtab.c hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
drm_info.c drm/gem: switch dev->object_name_lock to a mutex 2013-08-21 12:58:01 +10:00
drm_ioc32.c
drm_ioctl.c drm: Advertise async page flip ability through GETCAP ioctl 2013-08-30 09:25:13 +10:00
drm_irq.c drm: Don't pass negative delta to ktime_sub_ns() 2013-08-08 09:50:25 +10:00
drm_lock.c
drm_memory.c drm/memory: don't export agp helpers 2013-08-19 10:05:53 +10:00
drm_mm.c Merge tag 'drm-intel-next-2013-08-23' of git://people.freedesktop.org/~danvet/drm-intel into drm-next 2013-08-30 09:47:41 +10:00
drm_modes.c drm: Remove drm_mode_list_concat() 2013-08-21 12:47:24 +10:00
drm_pci.c drm: implement experimental render nodes 2013-08-30 08:43:57 +10:00
drm_platform.c drm: implement experimental render nodes 2013-08-30 08:43:57 +10:00
drm_prime.c drm/prime: double lock typo 2013-08-30 08:58:32 +10:00
drm_rect.c drm: Add drm_rect_debug_print() 2013-04-30 22:20:00 +02:00
drm_scatter.c drm: disallow legacy sg ioctls for modesetting drivers 2013-08-19 10:04:06 +10:00
drm_stub.c drm: implement experimental render nodes 2013-08-30 08:43:57 +10:00
drm_sysfs.c drm: Convert drm class driver from legacy pm ops to dev_pm_ops 2013-07-04 10:50:26 +10:00
drm_trace.h drm: fix print format of sequence in trace point 2013-07-04 10:55:27 +10:00
drm_trace_points.c
drm_usb.c drm: implement experimental render nodes 2013-08-30 08:43:57 +10:00
drm_vm.c drm: rip out drm_core_has_MTRR checks 2013-08-19 14:11:44 +10:00
drm_vma_manager.c drm/vma: add access management helpers 2013-08-27 11:54:54 +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