[PATCH RFC 000/111] Etnaviv DRM driver

[Lucas Stach <l.stach@pengutronix.de>]

Hey all,

this is the Etnaviv DRM driver for Vivante embedded GPUs. It is heavily
influenced by the MSM driver, as can be clearly seen with the first commits.

The userspace interface does a look a lot like the MSM one, with some small
differences:

- Each GPU core is a pipe as with MSM, but Vivante doesn't have a strict
  separation of tasks between the pipes. On some SoCs like the i.MX6 each
  pipe feeds one rendering backend (2D, 3D, VG), but there are also SoCs
  out there where on core (pipe) houses more than one backend. So pipes
  on Etnaviv represent one core, that may be switched between multiple
  execution state through the command stream. To allow for proper separation
  between processes each process may specify the expected execution state
  on submit.

- OR-ing and shifting of BO reloc addresses has been removed, as there is
  need for this on Vivante GPUs. The register interface is designed in a way
  that one always fills in complete 32bit addresses without any additional
  informations.

- Presumption of BO addresses is not used right now, as the GPU MMU v1 can not
  quarantee full protection. There is a 2GB window into physical memory without
  any MMU translation in between, so we always have to process all relocs to guard
  against malicious userspace. I've left it in the interface though as MMU v2
  seems to be able to give full protection and it might become useful at that
  point.

Unfinished stuff:
- GPU PM and context switching. This already works for the GPU 2D where there
  isn't much state to retain on the GPU itself. For full context switching and
  power down support on the GPU 3D the userspace needs to aid the kernel with a
  context restore buffer. This part isn't done yet.

It's a rather long series. I already tried to squash some commits together, but
wanted to retain the authorship of the individual people that worked on this
driver for now. Maybe if everyone involved is okay with it we could squash some
of the fixup commits a bit more.

I've kept things in staging for now, as that's the place where Christian started
this driver, but would really like to move it to DRM proper _before_ merging. So
please review stuff with that in mind. 

Russell King has some experimental support in the xf86-video-armada driver to
get some X accel running atop of this. I have a working libdrm/MESA stack that
basically works for some simple applications, but needs a good deal more work to
clean up.

If you would like to look at this stuff as a git tree feel free to fetch:

git://git.pengutronix.de/git/lst/linux.git etnaviv-for-upstream

Regards,
Lucas

Christian Gmeiner (2):
  staging: etnaviv: add drm driver
  staging: etnaviv: quiten down kernel log output

Lucas Stach (28):
  staging: etnaviv: add devicetree bindings
  staging: etnaviv: import new headers
  staging: etnaviv: remove IOMMUv2 stubs
  staging: etnaviv: allow to draw up to 256 rectangles in one draw call
  staging: etnaviv: align command stream size to 64 bit
  staging: etnaviv: correct instruction count for GC2000 and GC880
  staging: etnaviv: reconfigure bus mapping on GC2000
  staging: etnaviv: fix cache cleaning for uncached SHM buffers
  staging: etnaviv: properly flush all TLBs on MMUv1
  staging: etnaviv: convert to_etnaviv_bo() to real function
  staging: etnaviv: take gpu instead of pipe as input to fence wait
    function
  staging: etnaviv: plug in fence waiting in cpu_prepare
  staging: etnaviv: allow to map buffer object into multiple address
    spaces
  staging: etnaviv: don't pretend to have a single MMU
  staging: etnaviv: use GPU device to construct MMU
  staging: etnaviv: flush MMU when switching context
  staging: etnaviv: add flag to force buffer through MMU
  staging: etnaviv: use more natural devicetree abstraction
  staging: etnaviv: don't override platform provided IRQ flags
  staging: etnaviv: separate GPU pipes from execution state
  staging: etnaviv: make sure to unlock DRM mutex when component bind
    fails
  staging: etnaviv: clean up public API
  staging: etnaviv: prune dumb buffer support
  staging: etnaviv: properly prefix all prime functions to etnaviv
  staging: etnaviv: rename last remaining bits from msm to etnaviv
  staging: etnaviv: add proper license header to all files
  staging: etnaviv: some final trivial changes to the module
  ARM: imx6: add Vivante GPU nodes

Philipp Zabel (1):
  of: Add vendor prefix for Vivante Corporation

Russell King (80):
  staging: etnaviv: fix oops on unbind
  staging: etnaviv: fix oops in timer subsystem caused by hangcheck
    timer
  staging: etnaviv: fix etnaviv_add_components()
  staging: etnaviv: fix etnaviv_hw_reset()
  staging: etnaviv: fix etnaviv gpu debugfs output
  staging: etnaviv: fix fence implementation
  staging: etnaviv: fix buffer dumping code
  staging: etnaviv: fix ring buffer overflow check
  staging: etnaviv: fix cleanup of imported dmabufs
  staging: etnaviv: fix printk formats
  staging: etnaviv: validation: ensure space for the LINK command
  staging: etnaviv: validation: improve command buffer size checks
  staging: etnaviv: validation: improve relocation validation
  staging: etnaviv: fix sparse warnings
  staging: etnaviv: use devm_ioremap_resource()
  staging: etnaviv: respect the submission command offset
  staging: etnaviv: add an offset for buffer dumping
  staging: etnaviv: quieten down submission debugging
  staging: etnaviv: fix multiple command buffer submission in
    etnaviv_buffer_queue()
  staging: etnaviv: package up events into etnaviv_event struct
  staging: etnaviv: track the last known GPU position
  staging: etnaviv: ensure that ring buffer wraps
  staging: etnaviv: fix checkpatch errors
  staging: etnaviv: fix checkpatch warnings
  staging: etnaviv: fix get_pages() failure path
  staging: etnaviv: add gem operations structure to etnaviv objects
  staging: etnaviv: convert prime import to use etnaviv_gem_ops
  staging: etnaviv: convert shmem release to use etnaviv_gem_ops
  staging: etnaviv: convert cmdbuf release to use etnaviv_gem_ops
  staging: etnaviv: move drm_gem_object_release()
  staging: etnaviv: ensure cleanup of reservation object
  staging: etnaviv: clean up etnaviv_gem_free_object()
  staging: etnaviv: provide etnaviv_gem_new_private()
  staging: etnaviv: move msm_gem_import() etc to etnaviv_gem_prime.c
  staging: etnaviv: clean up prime import
  staging: etnaviv: convert get_pages()/put_pages() to take etnaviv_obj
  staging: etnaviv: clean up etnaviv_gem_{get,put}_pages()
  staging: etnaviv: add gem get_pages() method
  staging: etnaviv: fix DMA API usage
  staging: etnaviv: add support to insert a MMU flush into GPU stream
  staging: etnaviv: move GPU memory management into MMU
  staging: etnaviv: publish and use mmu geometry
  staging: etnaviv: mmuv1: ensure we unmap all entries
  staging: etnaviv: move MMU setup and teardown code to etnaviv_mmu.c
  staging: etnaviv: hack: bypass iommu with contiguous buffers
  staging: etnaviv: implement round-robin GPU MMU allocation
  staging: etnaviv: fix etnaviv_iommu_map_gem() return paths
  staging: etnaviv: implement MMU reaping
  staging: etnaviv: move scatterlist creation to etnaviv_gem_get_pages()
  staging: etnaviv: add userptr mapping support
  staging: etnaviv: call the DRM device 'drm'
  staging: etnaviv: clean up printk()s etc
  staging: etnaviv: safely take down hangcheck
  staging: etnaviv: move hangcheck disable to separate function
  staging: etnaviv: stop the hangcheck timer mis-firing
  staging: etnaviv: ensure that we retire all pending events
  staging: etnaviv: ensure GPU reset times out
  staging: etnaviv: add workarounds for GC320 on iMX6
  staging: etnaviv: increase iommu page table size to 512KiB
  staging: etnaviv: allow non-DT use
  staging: etnaviv: dump mmu allocations
  staging: etnaviv: use definitions for constants
  staging: etnaviv: fix fence wrapping for gem objects
  staging: etnaviv: move scatterlist map/unmap
  staging: etnaviv: remove presumption of BO addresses
  staging: etnaviv: clean up etnaviv mmu scatterlist code
  staging: etnaviv: "better" DMA API usage
  staging: etnaviv: iommu: add a poisoned bad page
  staging: etnaviv: validate user supplied command stream
  staging: etnaviv: allow get_param without auth
  staging: etnaviv: fix busy reporting
  staging: etnaviv: fix event allocation failure path
  staging: etnaviv: remove powerrail support
  staging: etnaviv: NULL out stale pointers at unbind time
  staging: etnaviv: move mutex around component_{un,}bind_all()
  staging: etnaviv: move PM calls into bind/unbind callbacks
  staging: etnaviv: separate out etnaviv gpu hardware initialisation
  staging: etnaviv: add support to shutdown and restore the front end
  staging: etnaviv: runtime PM: add initial support
  staging: etnaviv: add support for offset physical memory

 .../bindings/drm/etnaviv/etnaviv-drm.txt           |   44 +
 .../devicetree/bindings/vendor-prefixes.txt        |    1 +
 arch/arm/boot/dts/imx6dl.dtsi                      |    5 +
 arch/arm/boot/dts/imx6q.dtsi                       |   14 +
 arch/arm/boot/dts/imx6qdl.dtsi                     |   19 +
 drivers/staging/Kconfig                            |    2 +
 drivers/staging/Makefile                           |    1 +
 drivers/staging/etnaviv/Kconfig                    |   20 +
 drivers/staging/etnaviv/Makefile                   |   18 +
 drivers/staging/etnaviv/cmdstream.xml.h            |  218 ++++
 drivers/staging/etnaviv/common.xml.h               |  249 ++++
 drivers/staging/etnaviv/etnaviv_buffer.c           |  306 +++++
 drivers/staging/etnaviv/etnaviv_cmd_parser.c       |  121 ++
 drivers/staging/etnaviv/etnaviv_drv.c              |  675 +++++++++++
 drivers/staging/etnaviv/etnaviv_drv.h              |  143 +++
 drivers/staging/etnaviv/etnaviv_gem.c              |  904 ++++++++++++++
 drivers/staging/etnaviv/etnaviv_gem.h              |  137 +++
 drivers/staging/etnaviv/etnaviv_gem_prime.c        |  116 ++
 drivers/staging/etnaviv/etnaviv_gem_submit.c       |  427 +++++++
 drivers/staging/etnaviv/etnaviv_gpu.c              | 1255 ++++++++++++++++++++
 drivers/staging/etnaviv/etnaviv_gpu.h              |  159 +++
 drivers/staging/etnaviv/etnaviv_iommu.c            |  216 ++++
 drivers/staging/etnaviv/etnaviv_iommu.h            |   26 +
 drivers/staging/etnaviv/etnaviv_mmu.c              |  269 +++++
 drivers/staging/etnaviv/etnaviv_mmu.h              |   53 +
 drivers/staging/etnaviv/state.xml.h                |  351 ++++++
 drivers/staging/etnaviv/state_hi.xml.h             |  407 +++++++
 include/uapi/drm/etnaviv_drm.h                     |  225 ++++
 28 files changed, 6381 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/drm/etnaviv/etnaviv-drm.txt
 create mode 100644 drivers/staging/etnaviv/Kconfig
 create mode 100644 drivers/staging/etnaviv/Makefile
 create mode 100644 drivers/staging/etnaviv/cmdstream.xml.h
 create mode 100644 drivers/staging/etnaviv/common.xml.h
 create mode 100644 drivers/staging/etnaviv/etnaviv_buffer.c
 create mode 100644 drivers/staging/etnaviv/etnaviv_cmd_parser.c
 create mode 100644 drivers/staging/etnaviv/etnaviv_drv.c
 create mode 100644 drivers/staging/etnaviv/etnaviv_drv.h
 create mode 100644 drivers/staging/etnaviv/etnaviv_gem.c
 create mode 100644 drivers/staging/etnaviv/etnaviv_gem.h
 create mode 100644 drivers/staging/etnaviv/etnaviv_gem_prime.c
 create mode 100644 drivers/staging/etnaviv/etnaviv_gem_submit.c
 create mode 100644 drivers/staging/etnaviv/etnaviv_gpu.c
 create mode 100644 drivers/staging/etnaviv/etnaviv_gpu.h
 create mode 100644 drivers/staging/etnaviv/etnaviv_iommu.c
 create mode 100644 drivers/staging/etnaviv/etnaviv_iommu.h
 create mode 100644 drivers/staging/etnaviv/etnaviv_mmu.c
 create mode 100644 drivers/staging/etnaviv/etnaviv_mmu.h
 create mode 100644 drivers/staging/etnaviv/state.xml.h
 create mode 100644 drivers/staging/etnaviv/state_hi.xml.h
 create mode 100644 include/uapi/drm/etnaviv_drm.h

-- 
2.1.4

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