[PATCH 000/115] Android ION for drivers/staging

From: John Stultz
Date: Fri Dec 13 2013 - 17:26:10 EST

This patchset is to submit the Android ION code to drivers/staging.

ION is a constraint aware memory allocator used by Android in order
to allocate memory that can be properly shared between a number of
devices that possibly have different memory access constraints.

You can read some background on ION as well as some problematic
aspects of ION in my lwn summary here:

Recently, Colin Cross has put in quite a bit of effort to resolve
a number of the issues identified in that article as well as other.

While a number of issues remain, including negative sentiments
from upstream maintainers about the interface, ION provides
functionality (constraints based allocation), which is not currently
available upstream.

As discussed at Linux Plumbers this year (https://lwn.net/Articles/569704/)
it was proposed to merge the ION code into staging. This will allow for
better visibility to the upstream community, allowing further review
and understanding of the code, but it will also aid in the design of
dma-buf constraint-aware memory allocation helpers, allowing us to share
the backing heap allocation implementations.

In order to preserve authorship history, I've taken all the ION changes
in AOSP's common.git android-3.10 branch up to commit 8f1c42284159ebd6
(Improve ION config descriptions). The only modifications to the patches
that I've made is pushing down Colin's patch to migrate ION to staging
(ION was originally implemented in drivers/gpu/ion) so all the patches
apply to staging from the start.

I've also had to add a single patch (the last one) which moves ION
to use the new scan/count shrinker api introduced in 3.12.

Other then this one change, the only diff from AOSP's 3.10 branch are
corrected path names in the header comment. ie:
- * drivers/gpu/ion/ion.c
+ * drivers/staging/android/ion/ion.c

This is a fairly large patchset, and is also available here:
http://git.linaro.org/git/people/john.stultz/android-dev.git dev/ion-staging

Please let me know if you have any thoughts or objections.


Arve HjÃnnevÃg (2):
gpu: ion: __dma_page_cpu_to_dev -> arm_dma_ops.sync_single_for_device
gpu: ion: Remove __GFP_NO_KSWAPD

Benjamin Gaignard (4):
gpu: ion: fix carveout ops
gpu: ion: fix compilation warning
gpu: ion: fix ion_platform_data definition
gpu: ion: add CMA heap

Colin Cross (36):
gpu: ion: ion_carveout_heap: fix for 3.4
ion: chunk_heap: fix leak in allocated counter
ion: add free list size to heap debug files
ion: convert map_kernel to return ERR_PTR
ion: remove IS_ERR_OR_NULL
ion: replace userspace handle cookies with idr
ion: index client->handles rbtree by buffer
ion: don't use id 0 for handle cookie
gpu: ion: delete ion_system_mapper.c
ion: move userspace api into uapi/ion.h
ion: hold reference to handle after ion_uhandle_get
ion: fix crash when alloc len is -1
ion: fix dma APIs
ion: convert sg_dma_len(sg) to sg->length
ion: check invalid values in ion_system_heap
ion: add test device for unit tests to interact with dma_bufs
ion: update idr to avoid deprecated apis
ion: don't use __arm_ioremap to map pages
ion: don't use phys_to_page or __phys_to_pfn
ion: fix printk warnings
gpu: ion: remove unnecessary function from system heap
ion: clean up ioctls
ion: drop dependency on ARM
ion: add alignment check to carveout heap
ion: optimize ion_heap_buffer_zero
ion: free low memory from page pools first
ion: check return value from remap_pfn_range
ion: use vm_insert_pfn for faulted pages
ion: remove ion_heap_alloc_pages
ion: allow cached mappings of chunk and system heap buffers
ion: use alloc_pages in system contig heap
ion: fix sparse warnings
ion: carveout heap: zero buffers on free, fix memory leak
ion: add helper to zero contiguous region of pages
ion: add alignment check to chunk heap
ion: fix bugs in cma heap

Dima Zavin (1):
gpu: ion: do not ask for compound pages in system heap

Greg Hackmann (2):
gpu: ion: fill in buffer->{dev,size} before mapping new buffers
gpu: ion: fix page offset in dma_buf_kmap()

JP Abgrall (1):
gpu: ion: fix kfree/list_del order

Johan Mossberg (2):
gpu: ion: Export ion_client_create
gpu: ion: Add support for sharing buffers with dma buf kernel handles

John Stultz (6):
ion: Add Kconfig dependency to ARM
ion: Fix compat support to use proper compat ioctl numbers
ion: Fix two small issues in system_heap allocation
ion: Cleanup whitespace issues and other checkpatch problems
ion: Improve ION config description
ion: Update system heap shrinker to use the new count/scan interface

KyongHo Cho (1):
gpu: ion: several bugfixes and enhancements of ION

Laura Abbott (3):
gpu: ion: Loop on the handle count when destroying
gpu: ion: Map only the vma size given
gpu: ion: Don't call ion_buffer_put on error path

Mitchel Humpherys (1):
gpu: ion: fix use-after-free in ion_heap_freelist_drain

Olav Haugan (3):
gpu: ion: Add missing argument to WARN call
gpu: ion: Add EXPORT_SYMBOL to functions
gpu: ion: IOCTL return success when error occurs

Rebecca Schultz Zavin (50):
gpu: ion: Add ION Memory Manager
ion: Switch map/unmap dma api to sg_tables
ion: Add reserve function to ion
ion: Switch ion to use dma-buf
gpu: ion: Use alloc_pages instead of vmalloc from the system heap
gpu: ion: support begin/end and kmap/kunmap dma_buf ops
gpu: ion: Allocate the sg_table at creation time rather than
gpu: ion: Get an sg_table from an ion handle
gpu: ion: Set the dma_address of the sg list at alloc time
gpu: ion: ion_system_heap: Change allocations to GFP_HIGHUSER
gpu: ion: Add cache maintenance to ion.
gpu: ion: Modify the system heap to try to allocate large/huge pages
gpu: ion: Add explicit sync ioctl
gpu: ion: Only map as much of the vma as the user requested
gpu: ion: Switch to using kmalloc rather than kmap during allocation
gpu: ion: Fix race between ion_import and ion_free
gpu: ion: Fix bug in ion_free
gpu: ion: Add debug information for orphaned handles
gpu: ion: Fix memory leak of dirty bits
gpu: ion: Add support for cached mappings that don't fault
gpu: ion: optimize system heap for non fault buffers
gpu: ion: Stop trying to allocate from an order on first failure
gpu: ion: ion_system_heap: Fix bug preventing compilation
gpu: ion: use vmalloc to allocate page array to map kernel
gpu: ion: Add ion_page_pool.
gpu: ion: Use the ion_page_pool from the system heap
gpu: ion: Modify gfp flags in ion_system_heap
gpu: ion: Fix several issues with page pool
gpu: ion: Fix lockdep issue in ion_page_pool
gpu: ion: Switch to using a single shrink function
gpu: ion: Refactor locking
gpu: ion: Clear GFP_WAIT flag on high order allocations
gpu: ion: Don't flush allocatoins that come from the page pools
gpu: ion: Fix bug in ion_system_heap map_user
gpu: ion: Fix bug in zeroing pages in system heap
gpu: ion: Modify reserve function for carveouts with no start address
gpu: ion: Fix bug where MAP ioctl was no longer supported
gpu: ion: Switch heap rbtree to a prio list
gpu: ion: Refactor common mapping functions out of system heap
gpu: ion: Add chunk heap
gpu: ion: Clarify variable names and comments around heap ids v types
gpu: ion: Remove heapmask from client
gpu: ion: Modify zeroing code so it only allocates address space once
gpu: ion: Refactor the code to zero buffers
gpu: ion: Only flush buffers in the chunk heap if they were used
gpu: ion: Make ion_free asynchronous
gpu: ion: ion_chunk_heap: Zero chunk heap memory at creation time
gpu: ion: Fix bug in ion shrinker
gpu: ion: Also shrink memory cached in the deferred free list
gpu: ion: Fix performance issue in faulting code

Rom Lemarchand (3):
ion: add new ion_user_handle_t type for the user-space token
ion: change ion_user_handle_t definition to int
ion: add compat_ioctl

drivers/staging/android/Kconfig | 2 +
drivers/staging/android/Makefile | 2 +
drivers/staging/android/ion/Kconfig | 24 +
drivers/staging/android/ion/Makefile | 7 +
drivers/staging/android/ion/compat_ion.c | 177 +++
drivers/staging/android/ion/compat_ion.h | 30 +
drivers/staging/android/ion/ion.c | 1549 +++++++++++++++++++++++
drivers/staging/android/ion/ion.h | 204 +++
drivers/staging/android/ion/ion_carveout_heap.c | 194 +++
drivers/staging/android/ion/ion_chunk_heap.c | 195 +++
drivers/staging/android/ion/ion_cma_heap.c | 218 ++++
drivers/staging/android/ion/ion_heap.c | 314 +++++
drivers/staging/android/ion/ion_page_pool.c | 195 +++
drivers/staging/android/ion/ion_priv.h | 360 ++++++
drivers/staging/android/ion/ion_system_heap.c | 483 +++++++
drivers/staging/android/ion/ion_test.c | 281 ++++
drivers/staging/android/ion/tegra/Makefile | 1 +
drivers/staging/android/ion/tegra/tegra_ion.c | 96 ++
drivers/staging/android/uapi/ion.h | 196 +++
drivers/staging/android/uapi/ion_test.h | 71 ++
20 files changed, 4599 insertions(+)
create mode 100644 drivers/staging/android/ion/Kconfig
create mode 100644 drivers/staging/android/ion/Makefile
create mode 100644 drivers/staging/android/ion/compat_ion.c
create mode 100644 drivers/staging/android/ion/compat_ion.h
create mode 100644 drivers/staging/android/ion/ion.c
create mode 100644 drivers/staging/android/ion/ion.h
create mode 100644 drivers/staging/android/ion/ion_carveout_heap.c
create mode 100644 drivers/staging/android/ion/ion_chunk_heap.c
create mode 100644 drivers/staging/android/ion/ion_cma_heap.c
create mode 100644 drivers/staging/android/ion/ion_heap.c
create mode 100644 drivers/staging/android/ion/ion_page_pool.c
create mode 100644 drivers/staging/android/ion/ion_priv.h
create mode 100644 drivers/staging/android/ion/ion_system_heap.c
create mode 100644 drivers/staging/android/ion/ion_test.c
create mode 100644 drivers/staging/android/ion/tegra/Makefile
create mode 100644 drivers/staging/android/ion/tegra/tegra_ion.c
create mode 100644 drivers/staging/android/uapi/ion.h
create mode 100644 drivers/staging/android/uapi/ion_test.h


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