1 files changed, 323 insertions, 0 deletions
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/include/hmm/hmm_bo.h b/drivers/staging/media/atomisp/pci/atomisp2/include/hmm/hmm_bo.h
new file mode 100644
index 0000000..dffd6e9
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/include/hmm/hmm_bo.h
@@ -0,0 +1,323 @@
+/*
+ * Support for Medifield PNW Camera Imaging ISP subsystem.
+ *
+ * Copyright (c) 2010 Intel Corporation. All Rights Reserved.
+ *
+ * Copyright (c) 2010 Silicon Hive www.siliconhive.com.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ */
+
+#ifndef	__HMM_BO_H__
+#define	__HMM_BO_H__
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/mutex.h>
+#include "mmu/isp_mmu.h"
+#include "hmm/hmm_common.h"
+#include "ia_css_types.h"
+
+#define	check_bodev_null_return(bdev, exp)	\
+		check_null_return(bdev, exp, \
+			"NULL hmm_bo_device.\n")
+
+#define	check_bodev_null_return_void(bdev)	\
+		check_null_return_void(bdev, \
+			"NULL hmm_bo_device.\n")
+
+#define	check_bo_status_yes_goto(bo, _status, label) \
+	var_not_equal_goto((bo->status & (_status)), (_status), \
+			label, \
+			"HMM buffer status not contain %s.\n", \
+			#_status)
+
+#define	check_bo_status_no_goto(bo, _status, label) \
+	var_equal_goto((bo->status & (_status)), (_status), \
+			label, \
+			"HMM buffer status contains %s.\n", \
+			#_status)
+
+#define rbtree_node_to_hmm_bo(root_node)	\
+	container_of((root_node), struct hmm_buffer_object, node)
+
+#define	list_to_hmm_bo(list_ptr)	\
+	list_entry((list_ptr), struct hmm_buffer_object, list)
+
+#define	kref_to_hmm_bo(kref_ptr)	\
+	list_entry((kref_ptr), struct hmm_buffer_object, kref)
+
+#define	check_bo_null_return(bo, exp)	\
+	check_null_return(bo, exp, "NULL hmm buffer object.\n")
+
+#define	check_bo_null_return_void(bo)	\
+	check_null_return_void(bo, "NULL hmm buffer object.\n")
+
+#define	HMM_MAX_ORDER		3
+#define	HMM_MIN_ORDER		0
+
+#define	ISP_VM_START	0x0
+#define	ISP_VM_SIZE	(0x7FFFFFFF)	/* 2G address space */
+#define	ISP_PTR_NULL	NULL
+
+#define	HMM_BO_DEVICE_INITED	0x1
+
+enum hmm_bo_type {
+	HMM_BO_PRIVATE,
+	HMM_BO_SHARE,
+	HMM_BO_USER,
+#ifdef CONFIG_ION
+	HMM_BO_ION,
+#endif
+	HMM_BO_LAST,
+};
+
+enum hmm_page_type {
+	HMM_PAGE_TYPE_RESERVED,
+	HMM_PAGE_TYPE_DYNAMIC,
+	HMM_PAGE_TYPE_GENERAL,
+};
+
+#define	HMM_BO_MASK		0x1
+#define	HMM_BO_FREE		0x0
+#define	HMM_BO_ALLOCED	0x1
+#define	HMM_BO_PAGE_ALLOCED	0x2
+#define	HMM_BO_BINDED		0x4
+#define	HMM_BO_MMAPED		0x8
+#define	HMM_BO_VMAPED		0x10
+#define	HMM_BO_VMAPED_CACHED	0x20
+#define	HMM_BO_ACTIVE		0x1000
+#define	HMM_BO_MEM_TYPE_USER     0x1
+#define	HMM_BO_MEM_TYPE_PFN      0x2
+
+struct hmm_bo_device {
+	struct isp_mmu		mmu;
+
+	/* start/pgnr/size is used to record the virtual memory of this bo */
+	unsigned int start;
+	unsigned int pgnr;
+	unsigned int size;
+
+	/* list lock is used to protect the entire_bo_list */
+	spinlock_t	list_lock;
+#ifdef CONFIG_ION
+	struct ion_client	*iclient;
+#endif
+	int flag;
+
+	/* linked list for entire buffer object */
+	struct list_head entire_bo_list;
+	/* rbtree for maintain entire allocated vm */
+	struct rb_root allocated_rbtree;
+	/* rbtree for maintain entire free vm */
+	struct rb_root free_rbtree;
+	struct mutex rbtree_mutex;
+	struct kmem_cache *bo_cache;
+};
+
+struct hmm_page_object {
+	struct page		*page;
+	enum hmm_page_type	type;
+};
+
+struct hmm_buffer_object {
+	struct hmm_bo_device	*bdev;
+	struct list_head	list;
+	struct kref	kref;
+
+	/* mutex protecting this BO */
+	struct mutex		mutex;
+	enum hmm_bo_type	type;
+	struct hmm_page_object	*page_obj;	/* physical pages */
+	int		from_highmem;
+	int		mmap_count;
+#ifdef CONFIG_ION
+	struct ion_handle	*ihandle;
+#endif
+	int		status;
+	int		mem_type;
+	void		*vmap_addr; /* kernel virtual address by vmap */
+
+	struct rb_node	node;
+	unsigned int	start;
+	unsigned int	end;
+	unsigned int	pgnr;
+	/*
+	 * When insert a bo which has the same pgnr with an existed
+	 * bo node in the free_rbtree, using "prev & next" pointer
+	 * to maintain a bo linked list instead of insert this bo
+	 * into free_rbtree directly, it will make sure each node
+	 * in free_rbtree has different pgnr.
+	 * "prev & next" default is NULL.
+	 */
+	struct hmm_buffer_object	*prev;
+	struct hmm_buffer_object	*next;
+};
+
+struct hmm_buffer_object *hmm_bo_alloc(struct hmm_bo_device *bdev,
+				unsigned int pgnr);
+
+void hmm_bo_release(struct hmm_buffer_object *bo);
+
+int hmm_bo_device_init(struct hmm_bo_device *bdev,
+				struct isp_mmu_client *mmu_driver,
+				unsigned int vaddr_start, unsigned int size);
+
+/*
+ * clean up all hmm_bo_device related things.
+ */
+void hmm_bo_device_exit(struct hmm_bo_device *bdev);
+
+/*
+ * whether the bo device is inited or not.
+ */
+int hmm_bo_device_inited(struct hmm_bo_device *bdev);
+
+/*
+ * increse buffer object reference.
+ */
+void hmm_bo_ref(struct hmm_buffer_object *bo);
+
+/*
+ * decrese buffer object reference. if reference reaches 0,
+ * release function of the buffer object will be called.
+ *
+ * this call is also used to release hmm_buffer_object or its
+ * upper level object with it embedded in. you need to call
+ * this function when it is no longer used.
+ *
+ * Note:
+ *
+ * user dont need to care about internal resource release of
+ * the buffer object in the release callback, it will be
+ * handled internally.
+ *
+ * this call will only release internal resource of the buffer
+ * object but will not free the buffer object itself, as the
+ * buffer object can be both pre-allocated statically or
+ * dynamically allocated. so user need to deal with the release
+ * of the buffer object itself manually. below example shows
+ * the normal case of using the buffer object.
+ *
+ *	struct hmm_buffer_object *bo = hmm_bo_create(bdev, pgnr);
+ *	......
+ *	hmm_bo_unref(bo);
+ *
+ * or:
+ *
+ *	struct hmm_buffer_object bo;
+ *
+ *	hmm_bo_init(bdev, &bo, pgnr, NULL);
+ *	...
+ *	hmm_bo_unref(&bo);
+ */
+void hmm_bo_unref(struct hmm_buffer_object *bo);
+
+
+/*
+ * allocate/free physical pages for the bo. will try to alloc mem
+ * from highmem if from_highmem is set, and type indicate that the
+ * pages will be allocated by using video driver (for share buffer)
+ * or by ISP driver itself.
+ */
+
+
+int hmm_bo_allocated(struct hmm_buffer_object *bo);
+
+
+/*
+ * allocate/free physical pages for the bo. will try to alloc mem
+ * from highmem if from_highmem is set, and type indicate that the
+ * pages will be allocated by using video driver (for share buffer)
+ * or by ISP driver itself.
+ */
+int hmm_bo_alloc_pages(struct hmm_buffer_object *bo,
+		enum hmm_bo_type type, int from_highmem,
+		void *userptr, bool cached);
+void hmm_bo_free_pages(struct hmm_buffer_object *bo);
+int hmm_bo_page_allocated(struct hmm_buffer_object *bo);
+
+/*
+ * get physical page info of the bo.
+ */
+int hmm_bo_get_page_info(struct hmm_buffer_object *bo,
+		struct hmm_page_object **page_obj, int *pgnr);
+
+/*
+ * bind/unbind the physical pages to a virtual address space.
+ */
+int hmm_bo_bind(struct hmm_buffer_object *bo);
+void hmm_bo_unbind(struct hmm_buffer_object *bo);
+int hmm_bo_binded(struct hmm_buffer_object *bo);
+
+/*
+ * vmap buffer object's pages to contiguous kernel virtual address.
+ * if the buffer has been vmaped, return the virtual address directly.
+ */
+void *hmm_bo_vmap(struct hmm_buffer_object *bo, bool cached);
+
+/*
+ * flush the cache for the vmapped buffer object's pages,
+ * if the buffer has not been vmapped, return directly.
+ */
+void hmm_bo_flush_vmap(struct hmm_buffer_object *bo);
+
+/*
+ * vunmap buffer object's kernel virtual address.
+ */
+void hmm_bo_vunmap(struct hmm_buffer_object *bo);
+
+/*
+ * mmap the bo's physical pages to specific vma.
+ *
+ * vma's address space size must be the same as bo's size,
+ * otherwise it will return -EINVAL.
+ *
+ * vma->vm_flags will be set to (VM_RESERVED | VM_IO).
+ */
+int hmm_bo_mmap(struct vm_area_struct *vma,
+		struct hmm_buffer_object *bo);
+
+extern struct hmm_pool	dynamic_pool;
+extern struct hmm_pool	reserved_pool;
+
+/*
+ * find the buffer object by its virtual address vaddr.
+ * return NULL if no such buffer object found.
+ */
+struct hmm_buffer_object *hmm_bo_device_search_start(
+		struct hmm_bo_device *bdev, ia_css_ptr vaddr);
+
+/*
+ * find the buffer object by its virtual address.
+ * it does not need to be the start address of one bo,
+ * it can be an address within the range of one bo.
+ * return NULL if no such buffer object found.
+ */
+struct hmm_buffer_object *hmm_bo_device_search_in_range(
+		struct hmm_bo_device *bdev, ia_css_ptr vaddr);
+
+/*
+ * find the buffer object with kernel virtual address vaddr.
+ * return NULL if no such buffer object found.
+ */
+struct hmm_buffer_object *hmm_bo_device_search_vmap_start(
+		struct hmm_bo_device *bdev, const void *vaddr);
+
+
+#endif