| /****************************************************************************** |
| * |
| * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of version 2 of the GNU General Public License 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, USA |
| * |
| * |
| ******************************************************************************/ |
| |
| |
| #define _OSDEP_SERVICE_C_ |
| |
| #include <osdep_service.h> |
| #include <drv_types.h> |
| #include <recv_osdep.h> |
| #include <linux/vmalloc.h> |
| #include <rtw_ioctl_set.h> |
| |
| /* |
| * Translate the OS dependent @param error_code to OS independent RTW_STATUS_CODE |
| * @return: one of RTW_STATUS_CODE |
| */ |
| inline int RTW_STATUS_CODE(int error_code) |
| { |
| if (error_code >= 0) |
| return _SUCCESS; |
| return _FAIL; |
| } |
| |
| u32 rtw_atoi(u8 *s) |
| { |
| int num = 0, flag = 0; |
| int i; |
| for (i = 0; i <= strlen(s); i++) { |
| if (s[i] >= '0' && s[i] <= '9') |
| num = num * 10 + s[i] - '0'; |
| else if (s[0] == '-' && i == 0) |
| flag = 1; |
| else |
| break; |
| } |
| if (flag == 1) |
| num = num * -1; |
| return num; |
| } |
| |
| u8 *_rtw_malloc(u32 sz) |
| { |
| u8 *pbuf = NULL; |
| |
| pbuf = kmalloc(sz, in_interrupt() ? GFP_ATOMIC : GFP_KERNEL); |
| return pbuf; |
| } |
| |
| u8 *_rtw_zmalloc(u32 sz) |
| { |
| u8 *pbuf = _rtw_malloc(sz); |
| |
| if (pbuf != NULL) |
| memset(pbuf, 0, sz); |
| return pbuf; |
| } |
| |
| void *rtw_malloc2d(int h, int w, int size) |
| { |
| int j; |
| |
| void **a = (void **)rtw_zmalloc(h*sizeof(void *) + h*w*size); |
| if (a == NULL) { |
| pr_info("%s: alloc memory fail!\n", __func__); |
| return NULL; |
| } |
| |
| for (j = 0; j < h; j++) |
| a[j] = ((char *)(a+h)) + j*w*size; |
| |
| return a; |
| } |
| |
| void rtw_mfree2d(void *pbuf, int h, int w, int size) |
| { |
| kfree(pbuf); |
| } |
| |
| void _rtw_memset(void *pbuf, int c, u32 sz) |
| { |
| memset(pbuf, c, sz); |
| } |
| |
| void _rtw_init_listhead(struct list_head *list) |
| { |
| INIT_LIST_HEAD(list); |
| } |
| |
| /* |
| For the following list_xxx operations, |
| caller must guarantee the atomic context. |
| Otherwise, there will be racing condition. |
| */ |
| u32 rtw_is_list_empty(struct list_head *phead) |
| { |
| if (list_empty(phead)) |
| return true; |
| else |
| return false; |
| } |
| |
| void rtw_list_insert_head(struct list_head *plist, struct list_head *phead) |
| { |
| list_add(plist, phead); |
| } |
| |
| void rtw_list_insert_tail(struct list_head *plist, struct list_head *phead) |
| { |
| list_add_tail(plist, phead); |
| } |
| |
| /* |
| Caller must check if the list is empty before calling rtw_list_delete |
| */ |
| |
| u32 _rtw_down_sema(struct semaphore *sema) |
| { |
| if (down_interruptible(sema)) |
| return _FAIL; |
| else |
| return _SUCCESS; |
| } |
| |
| void _rtw_init_queue(struct __queue *pqueue) |
| { |
| _rtw_init_listhead(&(pqueue->queue)); |
| spin_lock_init(&(pqueue->lock)); |
| } |
| |
| u32 _rtw_queue_empty(struct __queue *pqueue) |
| { |
| return rtw_is_list_empty(&(pqueue->queue)); |
| } |
| |
| u32 rtw_end_of_queue_search(struct list_head *head, struct list_head *plist) |
| { |
| if (head == plist) |
| return true; |
| else |
| return false; |
| } |
| |
| inline u32 rtw_systime_to_ms(u32 systime) |
| { |
| return systime * 1000 / HZ; |
| } |
| |
| inline u32 rtw_ms_to_systime(u32 ms) |
| { |
| return ms * HZ / 1000; |
| } |
| |
| /* the input parameter start must be in jiffies */ |
| inline s32 rtw_get_passing_time_ms(u32 start) |
| { |
| return rtw_systime_to_ms(jiffies-start); |
| } |
| |
| inline s32 rtw_get_time_interval_ms(u32 start, u32 end) |
| { |
| return rtw_systime_to_ms(end-start); |
| } |
| |
| void rtw_sleep_schedulable(int ms) |
| { |
| u32 delta; |
| |
| delta = (ms * HZ)/1000;/* ms) */ |
| if (delta == 0) |
| delta = 1;/* 1 ms */ |
| set_current_state(TASK_INTERRUPTIBLE); |
| if (schedule_timeout(delta) != 0) |
| return; |
| } |
| |
| #define RTW_SUSPEND_LOCK_NAME "rtw_wifi" |
| |
| struct net_device *rtw_alloc_etherdev_with_old_priv(int sizeof_priv, |
| void *old_priv) |
| { |
| struct net_device *pnetdev; |
| struct rtw_netdev_priv_indicator *pnpi; |
| |
| pnetdev = alloc_etherdev_mq(sizeof(struct rtw_netdev_priv_indicator), 4); |
| if (!pnetdev) |
| goto RETURN; |
| |
| pnpi = netdev_priv(pnetdev); |
| pnpi->priv = old_priv; |
| pnpi->sizeof_priv = sizeof_priv; |
| |
| RETURN: |
| return pnetdev; |
| } |
| |
| struct net_device *rtw_alloc_etherdev(int sizeof_priv) |
| { |
| struct net_device *pnetdev; |
| struct rtw_netdev_priv_indicator *pnpi; |
| |
| pnetdev = alloc_etherdev_mq(sizeof(struct rtw_netdev_priv_indicator), 4); |
| if (!pnetdev) |
| goto RETURN; |
| |
| pnpi = netdev_priv(pnetdev); |
| |
| pnpi->priv = vzalloc(sizeof_priv); |
| if (!pnpi->priv) { |
| free_netdev(pnetdev); |
| pnetdev = NULL; |
| goto RETURN; |
| } |
| |
| pnpi->sizeof_priv = sizeof_priv; |
| RETURN: |
| return pnetdev; |
| } |
| |
| void rtw_free_netdev(struct net_device *netdev) |
| { |
| struct rtw_netdev_priv_indicator *pnpi; |
| |
| if (!netdev) |
| goto RETURN; |
| |
| pnpi = netdev_priv(netdev); |
| |
| if (!pnpi->priv) |
| goto RETURN; |
| |
| vfree(pnpi->priv); |
| free_netdev(netdev); |
| |
| RETURN: |
| return; |
| } |
| |
| int rtw_change_ifname(struct adapter *padapter, const char *ifname) |
| { |
| struct net_device *pnetdev; |
| struct net_device *cur_pnetdev; |
| struct rereg_nd_name_data *rereg_priv; |
| int ret; |
| |
| if (!padapter) |
| goto error; |
| |
| cur_pnetdev = padapter->pnetdev; |
| rereg_priv = &padapter->rereg_nd_name_priv; |
| |
| /* free the old_pnetdev */ |
| if (rereg_priv->old_pnetdev) { |
| free_netdev(rereg_priv->old_pnetdev); |
| rereg_priv->old_pnetdev = NULL; |
| } |
| |
| if (!rtnl_is_locked()) |
| unregister_netdev(cur_pnetdev); |
| else |
| unregister_netdevice(cur_pnetdev); |
| |
| rtw_proc_remove_one(cur_pnetdev); |
| |
| rereg_priv->old_pnetdev = cur_pnetdev; |
| |
| pnetdev = rtw_init_netdev(padapter); |
| if (!pnetdev) { |
| ret = -1; |
| goto error; |
| } |
| |
| SET_NETDEV_DEV(pnetdev, dvobj_to_dev(adapter_to_dvobj(padapter))); |
| |
| rtw_init_netdev_name(pnetdev, ifname); |
| |
| memcpy(pnetdev->dev_addr, padapter->eeprompriv.mac_addr, ETH_ALEN); |
| |
| if (!rtnl_is_locked()) |
| ret = register_netdev(pnetdev); |
| else |
| ret = register_netdevice(pnetdev); |
| if (ret != 0) { |
| RT_TRACE(_module_hci_intfs_c_, _drv_err_, |
| ("register_netdev() failed\n")); |
| goto error; |
| } |
| rtw_proc_init_one(pnetdev); |
| return 0; |
| error: |
| return -1; |
| } |
| |
| u64 rtw_modular64(u64 x, u64 y) |
| { |
| return do_div(x, y); |
| } |
| |
| u64 rtw_division64(u64 x, u64 y) |
| { |
| do_div(x, y); |
| return x; |
| } |
| |
| void rtw_buf_free(u8 **buf, u32 *buf_len) |
| { |
| *buf_len = 0; |
| kfree(*buf); |
| *buf = NULL; |
| } |
| |
| void rtw_buf_update(u8 **buf, u32 *buf_len, u8 *src, u32 src_len) |
| { |
| u32 ori_len = 0, dup_len = 0; |
| u8 *ori = NULL; |
| u8 *dup = NULL; |
| |
| if (!buf || !buf_len) |
| return; |
| |
| if (!src || !src_len) |
| goto keep_ori; |
| |
| /* duplicate src */ |
| dup = rtw_malloc(src_len); |
| if (dup) { |
| dup_len = src_len; |
| memcpy(dup, src, dup_len); |
| } |
| |
| keep_ori: |
| ori = *buf; |
| ori_len = *buf_len; |
| |
| /* replace buf with dup */ |
| *buf_len = 0; |
| *buf = dup; |
| *buf_len = dup_len; |
| |
| /* free ori */ |
| kfree(ori); |
| } |
| |
| |
| /** |
| * rtw_cbuf_full - test if cbuf is full |
| * @cbuf: pointer of struct rtw_cbuf |
| * |
| * Returns: true if cbuf is full |
| */ |
| inline bool rtw_cbuf_full(struct rtw_cbuf *cbuf) |
| { |
| return (cbuf->write == cbuf->read-1) ? true : false; |
| } |
| |
| /** |
| * rtw_cbuf_empty - test if cbuf is empty |
| * @cbuf: pointer of struct rtw_cbuf |
| * |
| * Returns: true if cbuf is empty |
| */ |
| inline bool rtw_cbuf_empty(struct rtw_cbuf *cbuf) |
| { |
| return (cbuf->write == cbuf->read) ? true : false; |
| } |
| |
| /** |
| * rtw_cbuf_push - push a pointer into cbuf |
| * @cbuf: pointer of struct rtw_cbuf |
| * @buf: pointer to push in |
| * |
| * Lock free operation, be careful of the use scheme |
| * Returns: true push success |
| */ |
| bool rtw_cbuf_push(struct rtw_cbuf *cbuf, void *buf) |
| { |
| if (rtw_cbuf_full(cbuf)) |
| return _FAIL; |
| |
| if (0) |
| DBG_88E("%s on %u\n", __func__, cbuf->write); |
| cbuf->bufs[cbuf->write] = buf; |
| cbuf->write = (cbuf->write+1)%cbuf->size; |
| |
| return _SUCCESS; |
| } |
| |
| /** |
| * rtw_cbuf_pop - pop a pointer from cbuf |
| * @cbuf: pointer of struct rtw_cbuf |
| * |
| * Lock free operation, be careful of the use scheme |
| * Returns: pointer popped out |
| */ |
| void *rtw_cbuf_pop(struct rtw_cbuf *cbuf) |
| { |
| void *buf; |
| if (rtw_cbuf_empty(cbuf)) |
| return NULL; |
| |
| if (0) |
| DBG_88E("%s on %u\n", __func__, cbuf->read); |
| buf = cbuf->bufs[cbuf->read]; |
| cbuf->read = (cbuf->read+1)%cbuf->size; |
| |
| return buf; |
| } |
| |
| /** |
| * rtw_cbuf_alloc - allocate a rtw_cbuf with given size and do initialization |
| * @size: size of pointer |
| * |
| * Returns: pointer of srtuct rtw_cbuf, NULL for allocation failure |
| */ |
| struct rtw_cbuf *rtw_cbuf_alloc(u32 size) |
| { |
| struct rtw_cbuf *cbuf; |
| |
| cbuf = (struct rtw_cbuf *)rtw_malloc(sizeof(*cbuf) + |
| sizeof(void *)*size); |
| |
| if (cbuf) { |
| cbuf->write = 0; |
| cbuf->read = 0; |
| cbuf->size = size; |
| } |
| return cbuf; |
| } |