From 4dbd5b751767bf88ffdda5d55646738871c751ad Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Wed, 23 Sep 2009 14:27:26 +0200 Subject: Add ar6000 wireless driver. --- drivers/ar6000/include/dl_list.h | 114 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 114 insertions(+) create mode 100644 drivers/ar6000/include/dl_list.h (limited to 'drivers/ar6000/include/dl_list.h') diff --git a/drivers/ar6000/include/dl_list.h b/drivers/ar6000/include/dl_list.h new file mode 100644 index 00000000000..4b9c5819854 --- /dev/null +++ b/drivers/ar6000/include/dl_list.h @@ -0,0 +1,114 @@ +/* + * + * Double-link list definitions (adapted from Atheros SDIO stack) + * + * Copyright (c) 2007 Atheros Communications Inc. + * All rights reserved. + * + * + * 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; + * + * Software distributed under the License is distributed on an "AS + * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or + * implied. See the License for the specific language governing + * rights and limitations under the License. + * + * + * + */ +#ifndef __DL_LIST_H___ +#define __DL_LIST_H___ + +#define A_CONTAINING_STRUCT(address, struct_type, field_name)\ + ((struct_type *)((A_UINT32)(address) - (A_UINT32)(&((struct_type *)0)->field_name))) + +/* list functions */ +/* pointers for the list */ +typedef struct _DL_LIST { + struct _DL_LIST *pPrev; + struct _DL_LIST *pNext; +}DL_LIST, *PDL_LIST; +/* + * DL_LIST_INIT , initialize doubly linked list +*/ +#define DL_LIST_INIT(pList)\ + {(pList)->pPrev = pList; (pList)->pNext = pList;} + +#define DL_LIST_IS_EMPTY(pList) (((pList)->pPrev == (pList)) && ((pList)->pNext == (pList))) +#define DL_LIST_GET_ITEM_AT_HEAD(pList) (pList)->pNext +#define DL_LIST_GET_ITEM_AT_TAIL(pList) (pList)->pPrev +/* + * ITERATE_OVER_LIST pStart is the list, pTemp is a temp list member + * NOT: do not use this function if the items in the list are deleted inside the + * iteration loop +*/ +#define ITERATE_OVER_LIST(pStart, pTemp) \ + for((pTemp) =(pStart)->pNext; pTemp != (pStart); (pTemp) = (pTemp)->pNext) + + +/* safe iterate macro that allows the item to be removed from the list + * the iteration continues to the next item in the list + */ +#define ITERATE_OVER_LIST_ALLOW_REMOVE(pStart,pItem,st,offset) \ +{ \ + PDL_LIST pTemp; \ + pTemp = (pStart)->pNext; \ + while (pTemp != (pStart)) { \ + (pItem) = A_CONTAINING_STRUCT(pTemp,st,offset); \ + pTemp = pTemp->pNext; \ + +#define ITERATE_END }} + +/* + * DL_ListInsertTail - insert pAdd to the end of the list +*/ +static INLINE PDL_LIST DL_ListInsertTail(PDL_LIST pList, PDL_LIST pAdd) { + /* insert at tail */ + pAdd->pPrev = pList->pPrev; + pAdd->pNext = pList; + pList->pPrev->pNext = pAdd; + pList->pPrev = pAdd; + return pAdd; +} + +/* + * DL_ListInsertHead - insert pAdd into the head of the list +*/ +static INLINE PDL_LIST DL_ListInsertHead(PDL_LIST pList, PDL_LIST pAdd) { + /* insert at head */ + pAdd->pPrev = pList; + pAdd->pNext = pList->pNext; + pList->pNext->pPrev = pAdd; + pList->pNext = pAdd; + return pAdd; +} + +#define DL_ListAdd(pList,pItem) DL_ListInsertHead((pList),(pItem)) +/* + * DL_ListRemove - remove pDel from list +*/ +static INLINE PDL_LIST DL_ListRemove(PDL_LIST pDel) { + pDel->pNext->pPrev = pDel->pPrev; + pDel->pPrev->pNext = pDel->pNext; + /* point back to itself just to be safe, incase remove is called again */ + pDel->pNext = pDel; + pDel->pPrev = pDel; + return pDel; +} + +/* + * DL_ListRemoveItemFromHead - get a list item from the head +*/ +static INLINE PDL_LIST DL_ListRemoveItemFromHead(PDL_LIST pList) { + PDL_LIST pItem = NULL; + if (pList->pNext != pList) { + pItem = pList->pNext; + /* remove the first item from head */ + DL_ListRemove(pItem); + } + return pItem; +} + +#endif /* __DL_LIST_H___ */ -- cgit v1.2.3