msm8x27: add new device-specific ion 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Add device-specific ion headers to prevent namespace collisions

Change-Id: I143920fa36197cea54ba6f4a0df0bf49a6beb48a

2 files changed, 430 insertions, 0 deletions

diff --git a/kernel-headers/linux/ion.h b/kernel-headers/linux/ion.h
new file mode 100644
index 0000000..30738b5
--- /dev/null
+++ b/kernel-headers/linux/ion.h
@@ -0,0 +1,73 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ***   To edit the content of this header, modify the corresponding
+ ***   source file (e.g. under external/kernel-headers/original/) then
+ ***   run bionic/libc/kernel/tools/update_all.py
+ ***
+ ***   Any manual change here will be lost the next time this script will
+ ***   be run. You've been warned!
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef _LINUX_ION_H
+#define _LINUX_ION_H
+#include <linux/types.h>
+struct ion_handle;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+typedef struct ion_handle *ion_user_handle_t;
+enum ion_heap_type {
+ ION_HEAP_TYPE_SYSTEM,
+ ION_HEAP_TYPE_SYSTEM_CONTIG,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ ION_HEAP_TYPE_CARVEOUT,
+ ION_HEAP_TYPE_CUSTOM,
+ ION_NUM_HEAPS = 16,
+};
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ION_HEAP_SYSTEM_MASK (1 << ION_HEAP_TYPE_SYSTEM)
+#define ION_HEAP_SYSTEM_CONTIG_MASK (1 << ION_HEAP_TYPE_SYSTEM_CONTIG)
+#define ION_HEAP_CARVEOUT_MASK (1 << ION_HEAP_TYPE_CARVEOUT)
+#define ION_FLAG_CACHED 1
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ION_FLAG_CACHED_NEEDS_SYNC 2
+struct ion_allocation_data {
+ size_t len;
+ size_t align;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned int heap_id_mask;
+ unsigned int flags;
+ ion_user_handle_t handle;
+};
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct ion_fd_data {
+ ion_user_handle_t handle;
+ int fd;
+};
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct ion_handle_data {
+ ion_user_handle_t handle;
+};
+struct ion_custom_data {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned int cmd;
+ unsigned long arg;
+};
+#define ION_IOC_MAGIC 'I'
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ION_IOC_ALLOC _IOWR(ION_IOC_MAGIC, 0,   struct ion_allocation_data)
+#define ION_IOC_FREE _IOWR(ION_IOC_MAGIC, 1, struct ion_handle_data)
+#define ION_IOC_MAP _IOWR(ION_IOC_MAGIC, 2, struct ion_fd_data)
+#define ION_IOC_SHARE _IOWR(ION_IOC_MAGIC, 4, struct ion_fd_data)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ION_IOC_IMPORT _IOWR(ION_IOC_MAGIC, 5, struct ion_fd_data)
+#define ION_IOC_SYNC _IOWR(ION_IOC_MAGIC, 7, struct ion_fd_data)
+#define ION_IOC_CUSTOM _IOWR(ION_IOC_MAGIC, 6, struct ion_custom_data)
+#endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
diff --git a/original-kernel-headers/linux/ion.h b/original-kernel-headers/linux/ion.h
new file mode 100644
index 0000000..f88d976
--- /dev/null
+++ b/original-kernel-headers/linux/ion.h
@@ -0,0 +1,357 @@
+/*
+ * include/linux/ion.h
+ *
+ * Copyright (C) 2011 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef _LINUX_ION_H
+#define _LINUX_ION_H
+
+#include <linux/types.h>
+
+struct ion_handle;
+typedef struct ion_handle *ion_user_handle_t;
+/**
+ * enum ion_heap_types - list of all possible types of heaps
+ * @ION_HEAP_TYPE_SYSTEM:	 memory allocated via vmalloc
+ * @ION_HEAP_TYPE_SYSTEM_CONTIG: memory allocated via kmalloc
+ * @ION_HEAP_TYPE_CARVEOUT:	 memory allocated from a prereserved
+ * 				 carveout heap, allocations are physically
+ * 				 contiguous
+ * @ION_NUM_HEAPS:		 helper for iterating over heaps, a bit mask
+ * 				 is used to identify the heaps, so only 32
+ * 				 total heap types are supported
+ */
+enum ion_heap_type {
+	ION_HEAP_TYPE_SYSTEM,
+	ION_HEAP_TYPE_SYSTEM_CONTIG,
+	ION_HEAP_TYPE_CARVEOUT,
+	ION_HEAP_TYPE_CUSTOM, /* must be last so device specific heaps always
+				 are at the end of this enum */
+	ION_NUM_HEAPS = 16,
+};
+
+#define ION_HEAP_SYSTEM_MASK		(1 << ION_HEAP_TYPE_SYSTEM)
+#define ION_HEAP_SYSTEM_CONTIG_MASK	(1 << ION_HEAP_TYPE_SYSTEM_CONTIG)
+#define ION_HEAP_CARVEOUT_MASK		(1 << ION_HEAP_TYPE_CARVEOUT)
+
+/**
+ * heap flags - the lower 16 bits are used by core ion, the upper 16
+ * bits are reserved for use by the heaps themselves.
+ */
+#define ION_FLAG_CACHED 1		/* mappings of this buffer should be
+					   cached, ion will do cache
+					   maintenance when the buffer is
+					   mapped for dma */
+#define ION_FLAG_CACHED_NEEDS_SYNC 2	/* mappings of this buffer will created
+					   at mmap time, if this is set
+					   caches must be managed manually */
+
+#ifdef __KERNEL__
+struct ion_device;
+struct ion_heap;
+struct ion_mapper;
+struct ion_client;
+struct ion_buffer;
+
+/* This should be removed some day when phys_addr_t's are fully
+   plumbed in the kernel, and all instances of ion_phys_addr_t should
+   be converted to phys_addr_t.  For the time being many kernel interfaces
+   do not accept phys_addr_t's that would have to */
+#define ion_phys_addr_t unsigned long
+
+/**
+ * struct ion_platform_heap - defines a heap in the given platform
+ * @type:	type of the heap from ion_heap_type enum
+ * @id:		unique identifier for heap.  When allocating (lower numbers 
+ * 		will be allocated from first)
+ * @name:	used for debug purposes
+ * @base:	base address of heap in physical memory if applicable
+ * @size:	size of the heap in bytes if applicable
+ *
+ * Provided by the board file.
+ */
+struct ion_platform_heap {
+	enum ion_heap_type type;
+	unsigned int id;
+	const char *name;
+	ion_phys_addr_t base;
+	size_t size;
+};
+
+/**
+ * struct ion_platform_data - array of platform heaps passed from board file
+ * @nr:		number of structures in the array
+ * @heaps:	array of platform_heap structions
+ *
+ * Provided by the board file in the form of platform data to a platform device.
+ */
+struct ion_platform_data {
+	int nr;
+	struct ion_platform_heap heaps[];
+};
+
+/**
+ * ion_reserve() - reserve memory for ion heaps if applicable
+ * @data:	platform data specifying starting physical address and
+ *		size
+ *
+ * Calls memblock reserve to set aside memory for heaps that are
+ * located at specific memory addresses or of specfic sizes not
+ * managed by the kernel
+ */
+void ion_reserve(struct ion_platform_data *data);
+
+/**
+ * ion_client_create() -  allocate a client and returns it
+ * @dev:	the global ion device
+ * @heap_mask:	mask of heaps this client can allocate from
+ * @name:	used for debugging
+ */
+struct ion_client *ion_client_create(struct ion_device *dev,
+				     unsigned int heap_mask, const char *name);
+
+/**
+ * ion_client_destroy() -  free's a client and all it's handles
+ * @client:	the client
+ *
+ * Free the provided client and all it's resources including
+ * any handles it is holding.
+ */
+void ion_client_destroy(struct ion_client *client);
+
+/**
+ * ion_alloc - allocate ion memory
+ * @client:	the client
+ * @len:	size of the allocation
+ * @align:	requested allocation alignment, lots of hardware blocks have
+ *		alignment requirements of some kind
+ * @heap_mask:	mask of heaps to allocate from, if multiple bits are set
+ *		heaps will be tried in order from lowest to highest order bit
+ * @flags:	heap flags, the low 16 bits are consumed by ion, the high 16
+ *		bits are passed on to the respective heap and can be heap
+ * 		custom
+ *
+ * Allocate memory in one of the heaps provided in heap mask and return
+ * an opaque handle to it.
+ */
+struct ion_handle *ion_alloc(struct ion_client *client, size_t len,
+			     size_t align, unsigned int heap_mask,
+			     unsigned int flags);
+
+/**
+ * ion_free - free a handle
+ * @client:	the client
+ * @handle:	the handle to free
+ *
+ * Free the provided handle.
+ */
+void ion_free(struct ion_client *client, struct ion_handle *handle);
+
+/**
+ * ion_phys - returns the physical address and len of a handle
+ * @client:	the client
+ * @handle:	the handle
+ * @addr:	a pointer to put the address in
+ * @len:	a pointer to put the length in
+ *
+ * This function queries the heap for a particular handle to get the
+ * handle's physical address.  It't output is only correct if
+ * a heap returns physically contiguous memory -- in other cases
+ * this api should not be implemented -- ion_sg_table should be used
+ * instead.  Returns -EINVAL if the handle is invalid.  This has
+ * no implications on the reference counting of the handle --
+ * the returned value may not be valid if the caller is not
+ * holding a reference.
+ */
+int ion_phys(struct ion_client *client, struct ion_handle *handle,
+	     ion_phys_addr_t *addr, size_t *len);
+
+/**
+ * ion_map_dma - return an sg_table describing a handle
+ * @client:	the client
+ * @handle:	the handle
+ *
+ * This function returns the sg_table describing
+ * a particular ion handle.
+ */
+struct sg_table *ion_sg_table(struct ion_client *client,
+			      struct ion_handle *handle);
+
+/**
+ * ion_map_kernel - create mapping for the given handle
+ * @client:	the client
+ * @handle:	handle to map
+ *
+ * Map the given handle into the kernel and return a kernel address that
+ * can be used to access this address.
+ */
+void *ion_map_kernel(struct ion_client *client, struct ion_handle *handle);
+
+/**
+ * ion_unmap_kernel() - destroy a kernel mapping for a handle
+ * @client:	the client
+ * @handle:	handle to unmap
+ */
+void ion_unmap_kernel(struct ion_client *client, struct ion_handle *handle);
+
+/**
+ * ion_share_dma_buf() - given an ion client, create a dma-buf fd
+ * @client:	the client
+ * @handle:	the handle
+ */
+int ion_share_dma_buf(struct ion_client *client, struct ion_handle *handle);
+
+/**
+ * ion_import_dma_buf() - given an dma-buf fd from the ion exporter get handle
+ * @client:	the client
+ * @fd:		the dma-buf fd
+ *
+ * Given an dma-buf fd that was allocated through ion via ion_share_dma_buf,
+ * import that fd and return a handle representing it.  If a dma-buf from
+ * another exporter is passed in this function will return ERR_PTR(-EINVAL)
+ */
+struct ion_handle *ion_import_dma_buf(struct ion_client *client, int fd);
+
+#endif /* __KERNEL__ */
+
+/**
+ * DOC: Ion Userspace API
+ *
+ * create a client by opening /dev/ion
+ * most operations handled via following ioctls
+ *
+ */
+
+/**
+ * struct ion_allocation_data - metadata passed from userspace for allocations
+ * @len:	size of the allocation
+ * @align:	required alignment of the allocation
+ * @heap_mask:	mask of heaps to allocate from
+ * @flags:	flags passed to heap
+ * @handle:	pointer that will be populated with a cookie to use to refer
+ *		to this allocation
+ *
+ * Provided by userspace as an argument to the ioctl
+ */
+struct ion_allocation_data {
+	size_t len;
+	size_t align;
+	unsigned int heap_id_mask;
+	unsigned int flags;
+	ion_user_handle_t handle;
+};
+
+/**
+ * struct ion_fd_data - metadata passed to/from userspace for a handle/fd pair
+ * @handle:	a handle
+ * @fd:		a file descriptor representing that handle
+ *
+ * For ION_IOC_SHARE or ION_IOC_MAP userspace populates the handle field with
+ * the handle returned from ion alloc, and the kernel returns the file
+ * descriptor to share or map in the fd field.  For ION_IOC_IMPORT, userspace
+ * provides the file descriptor and the kernel returns the handle.
+ */
+struct ion_fd_data {
+	ion_user_handle_t handle;
+	int fd;
+};
+
+/**
+ * struct ion_handle_data - a handle passed to/from the kernel
+ * @handle:	a handle
+ */
+struct ion_handle_data {
+	ion_user_handle_t handle;
+};
+
+/**
+ * struct ion_custom_data - metadata passed to/from userspace for a custom ioctl
+ * @cmd:	the custom ioctl function to call
+ * @arg:	additional data to pass to the custom ioctl, typically a user
+ *		pointer to a predefined structure
+ *
+ * This works just like the regular cmd and arg fields of an ioctl.
+ */
+struct ion_custom_data {
+	unsigned int cmd;
+	unsigned long arg;
+};
+
+#define ION_IOC_MAGIC		'I'
+
+/**
+ * DOC: ION_IOC_ALLOC - allocate memory
+ *
+ * Takes an ion_allocation_data struct and returns it with the handle field
+ * populated with the opaque handle for the allocation.
+ */
+#define ION_IOC_ALLOC		_IOWR(ION_IOC_MAGIC, 0, \
+				      struct ion_allocation_data)
+
+/**
+ * DOC: ION_IOC_FREE - free memory
+ *
+ * Takes an ion_handle_data struct and frees the handle.
+ */
+#define ION_IOC_FREE		_IOWR(ION_IOC_MAGIC, 1, struct ion_handle_data)
+
+/**
+ * DOC: ION_IOC_MAP - get a file descriptor to mmap
+ *
+ * Takes an ion_fd_data struct with the handle field populated with a valid
+ * opaque handle.  Returns the struct with the fd field set to a file
+ * descriptor open in the current address space.  This file descriptor
+ * can then be used as an argument to mmap.
+ */
+#define ION_IOC_MAP		_IOWR(ION_IOC_MAGIC, 2, struct ion_fd_data)
+
+/**
+ * DOC: ION_IOC_SHARE - creates a file descriptor to use to share an allocation
+ *
+ * Takes an ion_fd_data struct with the handle field populated with a valid
+ * opaque handle.  Returns the struct with the fd field set to a file
+ * descriptor open in the current address space.  This file descriptor
+ * can then be passed to another process.  The corresponding opaque handle can
+ * be retrieved via ION_IOC_IMPORT.
+ */
+#define ION_IOC_SHARE		_IOWR(ION_IOC_MAGIC, 4, struct ion_fd_data)
+
+/**
+ * DOC: ION_IOC_IMPORT - imports a shared file descriptor
+ *
+ * Takes an ion_fd_data struct with the fd field populated with a valid file
+ * descriptor obtained from ION_IOC_SHARE and returns the struct with the handle
+ * filed set to the corresponding opaque handle.
+ */
+#define ION_IOC_IMPORT		_IOWR(ION_IOC_MAGIC, 5, struct ion_fd_data)
+
+/**
+ * DOC: ION_IOC_SYNC - syncs a shared file descriptors to memory
+ *
+ * Deprecated in favor of using the dma_buf api's correctly (syncing
+ * will happend automatically when the buffer is mapped to a device).
+ * If necessary should be used after touching a cached buffer from the cpu,
+ * this will make the buffer in memory coherent.
+ */
+#define ION_IOC_SYNC		_IOWR(ION_IOC_MAGIC, 7, struct ion_fd_data)
+
+/**
+ * DOC: ION_IOC_CUSTOM - call architecture specific ion ioctl
+ *
+ * Takes the argument of the architecture specific ioctl to call and
+ * passes appropriate userdata for that ioctl
+ */
+#define ION_IOC_CUSTOM		_IOWR(ION_IOC_MAGIC, 6, struct ion_custom_data)
+
+#endif /* _LINUX_ION_H */