diff options
Diffstat (limited to 'drivers/staging/media/sunxi/cedar/ve/ve_mem_list.h')
| -rw-r--r-- | drivers/staging/media/sunxi/cedar/ve/ve_mem_list.h | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/drivers/staging/media/sunxi/cedar/ve/ve_mem_list.h b/drivers/staging/media/sunxi/cedar/ve/ve_mem_list.h new file mode 100644 index 000000000000..1b1d478ce66e --- /dev/null +++ b/drivers/staging/media/sunxi/cedar/ve/ve_mem_list.h @@ -0,0 +1,120 @@ +/* + * Filename: ve_mem_list.h + * Version: 0.01alpha + * Description: Video engine driver memory list management. + * License: GPLv2 + * + * Author : yangcaoyuan <yangcaoyuan@allwinnertech.com> + * Date : 2017/04/04 + * + * 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; + * + */ +#ifndef _VE_MEM__LIST_H +#define _VE_MEM__LIST_H + +#define ion_offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) + +#define aw_container_of(aw_ptr, type, member) ({ \ +const typeof(((type *)0)->member)*__mptr = (aw_ptr); \ +(type *)((char *)__mptr - ion_offsetof(type, member)); }) + +static inline void aw_prefetch(const void *x) {(void)x; } +static inline void aw_prefetchw(const void *x) {(void)x; } + +#define AW_LIST_LOCATION1 ((void *) 0x00100100) +#define AW_LIST_LOCATION2 ((void *) 0x00200200) + +struct aw_mem_list_head { +struct aw_mem_list_head *aw_next, *aw_prev; +}; + +#define AW_MEM_LIST_HEAD_INIT(aw_name) { &(aw_name), &(aw_name) } + +#define VE_LIST_HEAD(aw_name) \ +struct aw_mem_list_head aw_name = AW_MEM_LIST_HEAD_INIT(aw_name) + +#define AW_MEM_INIT_LIST_HEAD(aw_ptr) do { \ +(aw_ptr)->aw_next = (aw_ptr); (aw_ptr)->aw_prev = (aw_ptr); \ +} while (0) + +/* + * Insert a new entry between two known consecutive entries. + * + * This is only for internal list manipulation where we know + * the aw_prev/aw_next entries already! + */ +static inline void __aw_list_add(struct aw_mem_list_head *newList, + struct aw_mem_list_head *aw_prev, + struct aw_mem_list_head *aw_next) +{ + aw_next->aw_prev = newList; + newList->aw_next = aw_next; + newList->aw_prev = aw_prev; + aw_prev->aw_next = newList; +} + +/** + * list_add - add a new entry + * @new: new entry to be added + * @head: list head to add it after + * + * Insert a new entry after the specified head. + * This is good for implementing stacks. + */ +static inline void aw_mem_list_add(struct aw_mem_list_head *newList, + struct aw_mem_list_head *head) +{ + __aw_list_add(newList, head, head->aw_next); +} + +/** + * aw_mem_list_add_tail - add a new entry + * @new: new entry to be added + * @head: list head to add it before + * + * Insert a new entry before the specified head. + * This is useful for implementing queues. + */ +static inline void aw_mem_list_add_tail(struct aw_mem_list_head *newList, + struct aw_mem_list_head *head) +{ + __aw_list_add(newList, head->aw_prev, head); +} + +static inline void __aw_mem_list_del(struct aw_mem_list_head *aw_prev, + struct aw_mem_list_head *aw_next) +{ + aw_next->aw_prev = aw_prev; + aw_prev->aw_next = aw_next; +} + +static inline void aw_mem_list_del(struct aw_mem_list_head *entry) +{ + __aw_mem_list_del(entry->aw_prev, entry->aw_next); + entry->aw_next = AW_LIST_LOCATION1; + entry->aw_prev = AW_LIST_LOCATION2; +} + +#define aw_mem_list_entry(aw_ptr, type, member) aw_container_of(aw_ptr, type, member) + +#define aw_mem_list_for_each_safe(aw_pos, aw_n, aw_head) \ +for (aw_pos = (aw_head)->aw_next, aw_n = aw_pos->aw_next; aw_pos != (aw_head); \ +aw_pos = aw_n, aw_n = aw_pos->aw_next) + +#define aw_mem_list_for_each_entry(aw_pos, aw_head, member) \ +for (aw_pos = aw_mem_list_entry((aw_head)->aw_next, typeof(*aw_pos), member); \ + aw_prefetch(aw_pos->member.aw_next), &aw_pos->member != (aw_head); \ + aw_pos = aw_mem_list_entry(aw_pos->member.aw_next, typeof(*aw_pos), member)) + +#endif |