diff options
Diffstat (limited to 'drivers/staging/media/atomisp/include/hmm/hmm_pool.h')
-rw-r--r-- | drivers/staging/media/atomisp/include/hmm/hmm_pool.h | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/drivers/staging/media/atomisp/include/hmm/hmm_pool.h b/drivers/staging/media/atomisp/include/hmm/hmm_pool.h new file mode 100644 index 000000000000..8caf00502d74 --- /dev/null +++ b/drivers/staging/media/atomisp/include/hmm/hmm_pool.h @@ -0,0 +1,115 @@ +/* + * 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. + * + * + */ +#ifndef __HMM_POOL_H__ +#define __HMM_POOL_H__ + +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/list.h> +#include <linux/spinlock.h> +#include <linux/mutex.h> +#include <linux/kref.h> +#include "hmm_common.h" +#include "hmm/hmm_bo.h" + +#define ALLOC_PAGE_FAIL_NUM 5 + +enum hmm_pool_type { + HMM_POOL_TYPE_RESERVED, + HMM_POOL_TYPE_DYNAMIC, +}; + +/** + * struct hmm_pool_ops - memory pool callbacks. + * + * @pool_init: initialize the memory pool. + * @pool_exit: uninitialize the memory pool. + * @pool_alloc_pages: allocate pages from memory pool. + * @pool_free_pages: free pages to memory pool. + * @pool_inited: check whether memory pool is initialized. + */ +struct hmm_pool_ops { + int (*pool_init)(void **pool, unsigned int pool_size); + void (*pool_exit)(void **pool); + unsigned int (*pool_alloc_pages)(void *pool, + struct hmm_page_object *page_obj, + unsigned int size, bool cached); + void (*pool_free_pages)(void *pool, + struct hmm_page_object *page_obj); + int (*pool_inited)(void *pool); +}; + +struct hmm_pool { + struct hmm_pool_ops *pops; + + void *pool_info; +}; + +/** + * struct hmm_reserved_pool_info - represents reserved pool private data. + * @pages: a array that store physical pages. + * The array is as reserved memory pool. + * @index: to indicate the first blank page number + * in reserved memory pool(pages array). + * @pgnr: the valid page amount in reserved memory + * pool. + * @list_lock: list lock is used to protect the operation + * to reserved memory pool. + * @flag: reserved memory pool state flag. + */ +struct hmm_reserved_pool_info { + struct page **pages; + + unsigned int index; + unsigned int pgnr; + spinlock_t list_lock; + bool initialized; +}; + +/** + * struct hmm_dynamic_pool_info - represents dynamic pool private data. + * @pages_list: a list that store physical pages. + * The pages list is as dynamic memory pool. + * @list_lock: list lock is used to protect the operation + * to dynamic memory pool. + * @flag: dynamic memory pool state flag. + * @pgptr_cache: struct kmem_cache, manages a cache. + */ +struct hmm_dynamic_pool_info { + struct list_head pages_list; + + /* list lock is used to protect the free pages block lists */ + spinlock_t list_lock; + + struct kmem_cache *pgptr_cache; + bool initialized; + + unsigned int pool_size; + unsigned int pgnr; +}; + +struct hmm_page { + struct page *page; + struct list_head list; +}; + +extern struct hmm_pool_ops reserved_pops; +extern struct hmm_pool_ops dynamic_pops; + +#endif |