linux/drivers/gpu/drm
Linus Torvalds 8ceafbfa91 Merge branch 'for-linus-dma-masks' of git://git.linaro.org/people/rmk/linux-arm
Pull DMA mask updates from Russell King:
 "This series cleans up the handling of DMA masks in a lot of drivers,
  fixing some bugs as we go.

  Some of the more serious errors include:
   - drivers which only set their coherent DMA mask if the attempt to
     set the streaming mask fails.
   - drivers which test for a NULL dma mask pointer, and then set the
     dma mask pointer to a location in their module .data section -
     which will cause problems if the module is reloaded.

  To counter these, I have introduced two helper functions:
   - dma_set_mask_and_coherent() takes care of setting both the
     streaming and coherent masks at the same time, with the correct
     error handling as specified by the API.
   - dma_coerce_mask_and_coherent() which resolves the problem of
     drivers forcefully setting DMA masks.  This is more a marker for
     future work to further clean these locations up - the code which
     creates the devices really should be initialising these, but to fix
     that in one go along with this change could potentially be very
     disruptive.

  The last thing this series does is prise away some of Linux's addition
  to "DMA addresses are physical addresses and RAM always starts at
  zero".  We have ARM LPAE systems where all system memory is above 4GB
  physical, hence having DMA masks interpreted by (eg) the block layers
  as describing physical addresses in the range 0..DMAMASK fails on
  these platforms.  Santosh Shilimkar addresses this in this series; the
  patches were copied to the appropriate people multiple times but were
  ignored.

  Fixing this also gets rid of some ARM weirdness in the setup of the
  max*pfn variables, and brings ARM into line with every other Linux
  architecture as far as those go"

* 'for-linus-dma-masks' of git://git.linaro.org/people/rmk/linux-arm: (52 commits)
  ARM: 7805/1: mm: change max*pfn to include the physical offset of memory
  ARM: 7797/1: mmc: Use dma_max_pfn(dev) helper for bounce_limit calculations
  ARM: 7796/1: scsi: Use dma_max_pfn(dev) helper for bounce_limit calculations
  ARM: 7795/1: mm: dma-mapping: Add dma_max_pfn(dev) helper function
  ARM: 7794/1: block: Rename parameter dma_mask to max_addr for blk_queue_bounce_limit()
  ARM: DMA-API: better handing of DMA masks for coherent allocations
  ARM: 7857/1: dma: imx-sdma: setup dma mask
  DMA-API: firmware/google/gsmi.c: avoid direct access to DMA masks
  DMA-API: dcdbas: update DMA mask handing
  DMA-API: dma: edma.c: no need to explicitly initialize DMA masks
  DMA-API: usb: musb: use platform_device_register_full() to avoid directly messing with dma masks
  DMA-API: crypto: remove last references to 'static struct device *dev'
  DMA-API: crypto: fix ixp4xx crypto platform device support
  DMA-API: others: use dma_set_coherent_mask()
  DMA-API: staging: use dma_set_coherent_mask()
  DMA-API: usb: use new dma_coerce_mask_and_coherent()
  DMA-API: usb: use dma_set_coherent_mask()
  DMA-API: parport: parport_pc.c: use dma_coerce_mask_and_coherent()
  DMA-API: net: octeon: use dma_coerce_mask_and_coherent()
  DMA-API: net: nxp/lpc_eth: use dma_coerce_mask_and_coherent()
  ...
2013-11-14 07:55:21 +09:00
..
ast drm/ast: fix the ast open key function 2013-09-12 15:32:41 +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 'for-linus-dma-masks' of git://git.linaro.org/people/rmk/linux-arm 2013-11-14 07:55:21 +09:00
gma500 intel_mid: Renamed *mrst* to *intel_mid* 2013-10-17 16:40:36 -07:00
i2c drm/i2c: tda998x: fix audio muting 2013-09-24 09:41:18 -07:00
i810 drm: rip out drm_core_has_MTRR checks 2013-08-19 14:11:44 +10:00
i915 i915: fix compiler warning 2013-10-31 15:28:23 -07:00
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: use drm_gem_dumb_destroy helper 2013-09-28 10:14:06 -04:00
nouveau Merge remote-tracking branch 'nouveau/drm-nouveau-next' into drm-fixes 2013-10-09 16:09:25 +10:00
omapdrm DMA-API: others: use dma_set_coherent_mask() 2013-10-31 14:49:07 +00:00
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/dpm: fix incompatible casting on big endian 2013-10-23 16:25:18 -04:00
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 Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2013-09-05 10:17:26 -07:00
ttm Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux 2013-09-18 21:17:44 -05:00
udl drm/udl: rip out set_need_resched 2013-09-16 08:35:04 +10:00
via drm: rip out drm_core_has_MTRR checks 2013-08-19 14:11:44 +10:00
vmwgfx drm/vmwgfx: Don't kill clients on VT switch 2013-10-15 19:46:53 +01:00
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
drm_context.c Revert "drm: mark context support as a legacy subsystem" 2013-09-20 08:32:59 +10:00
drm_crtc_helper.c drm: Add drm_bridge 2013-09-02 10:23:26 +10:00
drm_crtc.c drm: fix DRM_IOCTL_MODE_GETFB handle-leak 2013-09-02 10:51:36 +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_drv.c drm: allow DRM_IOCTL_VERSION on render-nodes 2013-10-30 14:41:56 +10:00
drm_edid_load.c drm: avoid warning in drm_load_edid_firmware() 2013-07-10 14:21:46 -07:00
drm_edid.c drm/edid: catch kmalloc failure in drm_edid_to_speaker_allocation 2013-10-09 17:13:43 -04:00
drm_encoder_slave.c
drm_fb_cma_helper.c drm: Make drm_fb_cma_describe() static 2013-08-21 12:47:41 +10:00
drm_fb_helper.c Revert "drm/fb-helper: don't sleep for screen unblank when an oops is in progress" 2013-10-10 07:05:41 +10:00
drm_flip_work.c drm: add flip-work helper 2013-08-19 10:32:26 +10:00
drm_fops.c consolidate the reassignments of ->f_op in ->open() instances 2013-10-24 23:34:53 -04:00
drm_gem_cma_helper.c Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2013-09-05 10:17:26 -07:00
drm_gem.c drm/prime: Remove PRIME handles only if supported 2013-08-30 09:11:59 +10:00
drm_global.c
drm_hashtab.c
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_scatter.c drm: disallow legacy sg ioctls for modesetting drivers 2013-08-19 10:04:06 +10:00
drm_stub.c Revert "drm: mark context support as a legacy subsystem" 2013-09-20 08:32:59 +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_points.c
drm_trace.h drm: fix print format of sequence in trace point 2013-07-04 10:55:27 +10:00
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
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

************************************************************
* 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