1 /******************************************************************************
3 * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
19 ******************************************************************************/
24 #if defined(CONFIG_SDIO_HCI) || defined(CONFIG_GSPI_HCI)
25 #ifdef CONFIG_TX_AGGREGATION
26 #define MAX_XMITBUF_SZ (20480) // 20k
27 //#define SDIO_TX_AGG_MAX 5
29 #define MAX_XMITBUF_SZ (1664)
30 #define SDIO_TX_AGG_MAX 1
33 #if defined CONFIG_SDIO_HCI
34 #define NR_XMITBUFF (16)
36 #if defined(CONFIG_GSPI_HCI)
37 #define NR_XMITBUFF (128)
40 #elif defined (CONFIG_USB_HCI)
42 #ifdef CONFIG_USB_TX_AGGREGATION
43 #if defined(CONFIG_PLATFORM_ARM_SUNxI) || defined(CONFIG_PLATFORM_ARM_SUN6I) || defined(CONFIG_PLATFORM_ARM_SUN7I) || defined(CONFIG_PLATFORM_ARM_SUN8I)
44 #define MAX_XMITBUF_SZ (12288) //12k 1536*8
45 #elif defined (CONFIG_PLATFORM_MSTAR)
46 #define MAX_XMITBUF_SZ 7680 // 7.5k
48 #define MAX_XMITBUF_SZ (20480) // 20k
51 #define MAX_XMITBUF_SZ (2048)
54 #ifdef CONFIG_SINGLE_XMIT_BUF
55 #define NR_XMITBUFF (1)
57 #define NR_XMITBUFF (4)
58 #endif //CONFIG_SINGLE_XMIT_BUF
59 #elif defined (CONFIG_PCI_HCI)
60 #define MAX_XMITBUF_SZ (1664)
61 #define NR_XMITBUFF (128)
65 #define XMITBUF_ALIGN_SZ 4
68 #define XMITBUF_ALIGN_SZ 4
70 #ifdef USB_XMITBUF_ALIGN_SZ
71 #define XMITBUF_ALIGN_SZ (USB_XMITBUF_ALIGN_SZ)
73 #define XMITBUF_ALIGN_SZ 512
78 // xmit extension buff defination
79 #define MAX_XMIT_EXTBUF_SZ (1536)
80 #define NR_XMIT_EXTBUFF (32)
82 #define MAX_CMDBUF_SZ (5120) //(4096)
84 #define MAX_NUMBLKS (1)
86 #define XMIT_VO_QUEUE (0)
87 #define XMIT_VI_QUEUE (1)
88 #define XMIT_BE_QUEUE (2)
89 #define XMIT_BK_QUEUE (3)
91 #define VO_QUEUE_INX 0
92 #define VI_QUEUE_INX 1
93 #define BE_QUEUE_INX 2
94 #define BK_QUEUE_INX 3
95 #define BCN_QUEUE_INX 4
96 #define MGT_QUEUE_INX 5
97 #define HIGH_QUEUE_INX 6
98 #define TXCMD_QUEUE_INX 7
100 #define HW_QUEUE_ENTRY 8
102 #ifdef CONFIG_PCI_HCI
103 //#define TXDESC_NUM 64
104 #define TXDESC_NUM 128
105 #define TXDESC_NUM_BE_QUEUE 128
108 #define WEP_IV(pattrib_iv, dot11txpn, keyidx)\
110 pattrib_iv[0] = dot11txpn._byte_.TSC0;\
111 pattrib_iv[1] = dot11txpn._byte_.TSC1;\
112 pattrib_iv[2] = dot11txpn._byte_.TSC2;\
113 pattrib_iv[3] = ((keyidx & 0x3)<<6);\
114 dot11txpn.val = (dot11txpn.val == 0xffffff) ? 0: (dot11txpn.val+1);\
118 #define TKIP_IV(pattrib_iv, dot11txpn, keyidx)\
120 pattrib_iv[0] = dot11txpn._byte_.TSC1;\
121 pattrib_iv[1] = (dot11txpn._byte_.TSC1 | 0x20) & 0x7f;\
122 pattrib_iv[2] = dot11txpn._byte_.TSC0;\
123 pattrib_iv[3] = BIT(5) | ((keyidx & 0x3)<<6);\
124 pattrib_iv[4] = dot11txpn._byte_.TSC2;\
125 pattrib_iv[5] = dot11txpn._byte_.TSC3;\
126 pattrib_iv[6] = dot11txpn._byte_.TSC4;\
127 pattrib_iv[7] = dot11txpn._byte_.TSC5;\
128 dot11txpn.val = dot11txpn.val == 0xffffffffffffULL ? 0: (dot11txpn.val+1);\
131 #define AES_IV(pattrib_iv, dot11txpn, keyidx)\
133 pattrib_iv[0] = dot11txpn._byte_.TSC0;\
134 pattrib_iv[1] = dot11txpn._byte_.TSC1;\
136 pattrib_iv[3] = BIT(5) | ((keyidx & 0x3)<<6);\
137 pattrib_iv[4] = dot11txpn._byte_.TSC2;\
138 pattrib_iv[5] = dot11txpn._byte_.TSC3;\
139 pattrib_iv[6] = dot11txpn._byte_.TSC4;\
140 pattrib_iv[7] = dot11txpn._byte_.TSC5;\
141 dot11txpn.val = dot11txpn.val == 0xffffffffffffULL ? 0: (dot11txpn.val+1);\
145 #define HWXMIT_ENTRY 4
147 // For Buffer Descriptor ring architecture
149 #if defined (CONFIG_RTL8192E)
150 #define TX_BUFFER_SEG_NUM 1 // 0:2 seg, 1: 4 seg, 2: 8 seg.
154 #if defined(CONFIG_RTL8812A) || defined(CONFIG_RTL8821A)|| defined(CONFIG_RTL8723B)
155 #define TXDESC_SIZE 40
157 #elif defined (CONFIG_RTL8192E) // this section is defined for buffer descriptor ring architecture
158 #ifdef CONFIG_PCI_HCI
159 #define TXDESC_SIZE ((TX_BUFFER_SEG_NUM ==0)?16: ((TX_BUFFER_SEG_NUM ==1)? 32:64) )
160 #define TX_WIFI_INFO_SIZE 40
162 #define TXDESC_SIZE 40
166 #define TXDESC_SIZE 32
169 #ifdef CONFIG_TX_EARLY_MODE
170 #define EARLY_MODE_INFO_SIZE 8
174 #if defined(CONFIG_SDIO_HCI) || defined(CONFIG_GSPI_HCI)
175 #define TXDESC_OFFSET TXDESC_SIZE
178 #ifdef CONFIG_USB_HCI
179 #ifdef USB_PACKET_OFFSET_SZ
180 #define PACKET_OFFSET_SZ (USB_PACKET_OFFSET_SZ)
182 #define PACKET_OFFSET_SZ (8)
184 #define TXDESC_OFFSET (TXDESC_SIZE + PACKET_OFFSET_SZ)
187 #ifdef CONFIG_PCI_HCI
188 #if defined(CONFIG_RTL8192E) // this section is defined for buffer descriptor ring architecture
189 #define TXDESC_OFFSET TX_WIFI_INFO_SIZE
191 #define TXDESC_OFFSET 0
193 #define TX_DESC_NEXT_DESC_OFFSET (TXDESC_SIZE + 8)
194 #endif //CONFIG_PCI_HCI
203 #ifdef CONFIG_PCI_HCI
204 #define TXDESC_64_BYTES
205 #elif defined(CONFIG_RTL8812A) || defined(CONFIG_RTL8821A) || defined(CONFIG_RTL8723B)
206 #define TXDESC_40_BYTES
209 #if defined(CONFIG_RTL8192E) && defined(CONFIG_PCI_HCI) //8192ee
234 #if defined(TXDESC_40_BYTES) || defined(TXDESC_64_BYTES)
237 #endif // TXDESC_40_BYTES
239 #ifdef TXDESC_64_BYTES
243 // 2008/05/15 MH Because PCIE HW memory R/W 4K limit. And now, our descriptor
244 // size is 40 bytes. If you use more than 102 descriptor( 103*40>4096), HW will execute
245 // memoryR/W CRC error. And then all DMA fetch will fail. We must decrease descriptor
246 // number or enlarge descriptor size as 64 bytes.
256 struct tx_desc txdesc;
257 unsigned int value[TXDESC_SIZE>>2];
260 #ifdef CONFIG_PCI_HCI
261 #define PCI_MAX_TX_QUEUE_COUNT 8
265 struct tx_desc *desc;
268 unsigned int entries;
278 //struct hw_txqueue *phwtxqueue;
291 int pktlen; //the original 802.3 pkt raw_data len (not include ether_hdr data)
292 int pkt_hdrlen; //the original 802.3 pkt header len
293 int hdrlen; //the WLAN Header Len
296 int encrypt; //when 0 indicate no encrypt. when non-zero, indicate the encrypt algorith
304 int vcs_mode; //virtual carrier sense method
315 u8 raid;//rate adpative id
317 u8 ch_offset;//PRIME_CHNL_OFFSET
319 u8 ampdu_en;//tx ampdu enable
320 u8 mdata;//more data bit
323 u8 triggered;//for ap mode handling Power Saving sta
328 struct sta_info * psta;
329 #ifdef CONFIG_TCP_CSUM_OFFLOAD_TX
343 u16 pkt_hdrlen; //the original 802.3 pkt header len
344 u16 hdrlen; //the WLAN Header Len
345 u32 pktlen; //the original 802.3 pkt raw_data len (not include ether_hdr data)
348 u8 encrypt; //when 0 indicate no encrypt. when non-zero, indicate the encrypt algorith
356 u8 vcs_mode; //virtual carrier sense method
364 u8 raid;//rate adpative id
366 u8 ch_offset;//PRIME_CHNL_OFFSET
368 u8 ampdu_en;//tx ampdu enable
369 u8 ampdu_spacing; //ampdu_min_spacing for peer sta's rx
370 u8 mdata;//more data bit
371 u8 pctrl;//per packet txdesc control enable
372 u8 triggered;//for ap mode handling Power Saving sta
382 struct sta_info * psta;
383 #ifdef CONFIG_TCP_CSUM_OFFLOAD_TX
389 union Keytype dot11tkiptxmickey;
390 //union Keytype dot11tkiprxmickey;
391 union Keytype dot118021x_UncstKey;
395 struct sta_info *ptdls_sta;
403 #ifdef PLATFORM_FREEBSD
404 #define ETH_ALEN 6 /* Octets in one ethernet addr */
405 #define ETH_HLEN 14 /* Total octets in header. */
406 #define ETH_P_IP 0x0800 /* Internet Protocol packet */
408 /*struct rtw_ieee80211_hdr {
409 uint16_t frame_control;
410 uint16_t duration_id;
417 #endif //PLATFORM_FREEBSD
419 #define WLANHDR_OFFSET 64
421 #define NULL_FRAMETAG (0x0)
422 #define DATA_FRAMETAG 0x01
423 #define L2_FRAMETAG 0x02
424 #define MGNT_FRAMETAG 0x03
425 #define AMSDU_FRAMETAG 0x04
427 #define EII_FRAMETAG 0x05
428 #define IEEE8023_FRAMETAG 0x06
430 #define MP_FRAMETAG 0x07
432 #define TXAGG_FRAMETAG 0x08
441 u32 submit_time; /* */
442 u32 timeout_ms; /* <0: not synchronous, 0: wait forever, >0: up to ms waiting */
443 int status; /* status for operation */
444 #ifdef PLATFORM_LINUX
445 struct completion done;
450 RTW_SCTX_SUBMITTED = -1,
451 RTW_SCTX_DONE_SUCCESS = 0,
452 RTW_SCTX_DONE_UNKNOWN,
453 RTW_SCTX_DONE_TIMEOUT,
454 RTW_SCTX_DONE_BUF_ALLOC,
455 RTW_SCTX_DONE_BUF_FREE,
456 RTW_SCTX_DONE_WRITE_PORT_ERR,
457 RTW_SCTX_DONE_TX_DESC_NA,
458 RTW_SCTX_DONE_TX_DENY,
459 RTW_SCTX_DONE_CCX_PKT_FAIL,
460 RTW_SCTX_DONE_DRV_STOP,
461 RTW_SCTX_DONE_DEV_REMOVE,
462 RTW_SCTX_DONE_CMD_ERROR,
466 void rtw_sctx_init(struct submit_ctx *sctx, int timeout_ms);
467 int rtw_sctx_wait(struct submit_ctx *sctx, const char *msg);
468 void rtw_sctx_done_err(struct submit_ctx **sctx, int status);
469 void rtw_sctx_done(struct submit_ctx **sctx);
483 u16 buf_tag; // 0: Normal xmitbuf, 1: extension xmitbuf, 2:cmd xmitbuf
489 struct submit_ctx *sctx;
491 #ifdef CONFIG_USB_HCI
496 #if defined(PLATFORM_OS_XP)||defined(PLATFORM_LINUX) || defined(PLATFORM_FREEBSD)
498 dma_addr_t dma_transfer_addr; /* (in) dma addr for transfer_buffer */
501 #ifdef PLATFORM_OS_XP
505 #ifdef PLATFORM_OS_CE
506 USB_TRANSFER usb_transfer_write_port;
515 #if defined(CONFIG_SDIO_HCI) || defined(CONFIG_GSPI_HCI)
523 #ifdef PLATFORM_OS_XP
526 PSDBUS_REQUEST_PACKET pxmitbuf_sdrp;
530 #ifdef CONFIG_PCI_HCI
531 struct tx_desc *desc;
534 #if defined(DBG_XMIT_BUF )|| defined(DBG_XMIT_BUF_EXT)
545 struct pkt_attrib attrib;
555 struct xmit_buf *pxmitbuf;
557 #if defined(CONFIG_SDIO_HCI) || defined(CONFIG_GSPI_HCI)
562 #ifdef CONFIG_USB_HCI
563 #ifdef CONFIG_USB_TX_AGGREGATION
567 #ifdef CONFIG_RTL8192D
569 u16 EMPktLen[5];//The max value by HW
573 #ifdef CONFIG_XMIT_ACK
577 u8 *alloc_addr; /* the actual address this xmitframe allocated */
578 u8 ext_tag; /* 0:data, 1:mgmt */
593 sint apsd_setting; //When bit mask is on, the associated edca queue supports APSD.
596 //struct tx_servq blk_q[MAX_NUMBLKS];
597 struct tx_servq be_q; //priority == 0,3
598 struct tx_servq bk_q; //priority == 1,2
599 struct tx_servq vi_q; //priority == 4,5
600 struct tx_servq vo_q; //priority == 6,7
617 volatile sint free_sz; //in units of 64 bytes
618 volatile sint free_cmdsz;
619 volatile sint txsz[8];
631 CMDBUF_BEACON = 0x00,
641 _sema terminate_xmitthread_sema;
643 //_queue blk_strms[MAX_NUMBLKS];
650 //_queue legacy_dz_queue;
653 u8 *pallocated_frame_buf;
655 uint free_xmitframe_cnt;
656 _queue free_xmit_queue;
661 u8 *xframe_ext_alloc_addr;
663 uint free_xframe_ext_cnt;
664 _queue free_xframe_ext_queue;
666 //struct hw_txqueue be_txqueue;
667 //struct hw_txqueue bk_txqueue;
668 //struct hw_txqueue vi_txqueue;
669 //struct hw_txqueue vo_txqueue;
670 //struct hw_txqueue bmc_txqueue;
686 struct hw_xmit *hwxmits;
689 u8 wmm_para_seq[4];//sequence for wmm ac parameter strength from large to small. it's value is 0->vo, 1->vi, 2->be, 3->bk.
691 #ifdef CONFIG_USB_HCI
692 _sema tx_retevt;//all tx return event;
695 #ifdef PLATFORM_OS_CE
696 USB_TRANSFER usb_transfer_write_port;
697 // USB_TRANSFER usb_transfer_write_mem;
699 #ifdef PLATFORM_LINUX
700 struct tasklet_struct xmit_tasklet;
702 #ifdef PLATFORM_FREEBSD
703 struct task xmit_tasklet;
713 #ifdef CONFIG_PCI_HCI
715 struct rtw_tx_ring tx_ring[PCI_MAX_TX_QUEUE_COUNT];
716 int txringcount[PCI_MAX_TX_QUEUE_COUNT];
717 u8 beaconDMAing; //flag of indicating beacon is transmiting to HW by DMA
718 #ifdef PLATFORM_LINUX
719 struct tasklet_struct xmit_tasklet;
723 #if defined (CONFIG_SDIO_HCI) || defined(CONFIG_GSPI_HCI)
724 #ifdef CONFIG_SDIO_TX_TASKLET
725 #ifdef PLATFORM_LINUX
726 struct tasklet_struct xmit_tasklet;
727 #endif /* PLATFORM_LINUX */
729 _thread_hdl_ SdioXmitThread;
731 _sema SdioXmitTerminateSema;
732 #endif /* CONFIG_SDIO_TX_TASKLET */
733 #endif /* CONFIG_SDIO_HCI */
735 _queue free_xmitbuf_queue;
736 _queue pending_xmitbuf_queue;
737 u8 *pallocated_xmitbuf;
739 uint free_xmitbuf_cnt;
741 _queue free_xmit_extbuf_queue;
742 u8 *pallocated_xmit_extbuf;
744 uint free_xmit_extbuf_cnt;
746 struct xmit_buf pcmd_xmitbuf[CMDBUF_MAX];
749 #ifdef CONFIG_TX_EARLY_MODE
751 #ifdef CONFIG_SDIO_HCI
752 #define MAX_AGG_PKT_NUM 20
754 #define MAX_AGG_PKT_NUM 256 //Max tx ampdu coounts
757 struct agg_pkt_info agg_pkt[MAX_AGG_PKT_NUM];
760 #ifdef CONFIG_XMIT_ACK
763 struct submit_ctx ack_tx_ops;
769 extern struct xmit_frame *__rtw_alloc_cmdxmitframe(struct xmit_priv *pxmitpriv,
770 enum cmdbuf_type buf_type);
771 #define rtw_alloc_cmdxmitframe(p) __rtw_alloc_cmdxmitframe(p, CMDBUF_RSVD)
772 #define rtw_alloc_bcnxmitframe(p) __rtw_alloc_cmdxmitframe(p, CMDBUF_BEACON)
774 extern struct xmit_buf *rtw_alloc_xmitbuf_ext(struct xmit_priv *pxmitpriv);
775 extern s32 rtw_free_xmitbuf_ext(struct xmit_priv *pxmitpriv, struct xmit_buf *pxmitbuf);
777 extern struct xmit_buf *rtw_alloc_xmitbuf(struct xmit_priv *pxmitpriv);
778 extern s32 rtw_free_xmitbuf(struct xmit_priv *pxmitpriv, struct xmit_buf *pxmitbuf);
780 void rtw_count_tx_stats(_adapter *padapter, struct xmit_frame *pxmitframe, int sz);
781 extern void rtw_update_protection(_adapter *padapter, u8 *ie, uint ie_len);
782 static s32 update_attrib_sec_info(_adapter *padapter, struct pkt_attrib *pattrib, struct sta_info *psta);
783 static void update_attrib_phy_info(_adapter *padapter, struct pkt_attrib *pattrib, struct sta_info *psta);
784 extern s32 rtw_make_wlanhdr(_adapter *padapter, u8 *hdr, struct pkt_attrib *pattrib);
785 extern s32 rtw_put_snap(u8 *data, u16 h_proto);
787 extern struct xmit_frame *rtw_alloc_xmitframe(struct xmit_priv *pxmitpriv);
788 struct xmit_frame *rtw_alloc_xmitframe_ext(struct xmit_priv *pxmitpriv);
789 struct xmit_frame *rtw_alloc_xmitframe_once(struct xmit_priv *pxmitpriv);
790 extern s32 rtw_free_xmitframe(struct xmit_priv *pxmitpriv, struct xmit_frame *pxmitframe);
791 extern void rtw_free_xmitframe_queue(struct xmit_priv *pxmitpriv, _queue *pframequeue);
792 struct tx_servq *rtw_get_sta_pending(_adapter *padapter, struct sta_info *psta, sint up, u8 *ac);
793 extern s32 rtw_xmitframe_enqueue(_adapter *padapter, struct xmit_frame *pxmitframe);
794 extern struct xmit_frame* rtw_dequeue_xframe(struct xmit_priv *pxmitpriv, struct hw_xmit *phwxmit_i, sint entry);
796 extern s32 rtw_xmit_classifier(_adapter *padapter, struct xmit_frame *pxmitframe);
797 extern u32 rtw_calculate_wlan_pkt_size_by_attribue(struct pkt_attrib *pattrib);
798 #define rtw_wlan_pkt_size(f) rtw_calculate_wlan_pkt_size_by_attribue(&f->attrib)
799 extern s32 rtw_xmitframe_coalesce(_adapter *padapter, _pkt *pkt, struct xmit_frame *pxmitframe);
800 #ifdef CONFIG_IEEE80211W
801 extern s32 rtw_mgmt_xmitframe_coalesce(_adapter *padapter, _pkt *pkt, struct xmit_frame *pxmitframe);
802 #endif //CONFIG_IEEE80211W
804 extern struct tdls_txmgmt *ptxmgmt;
805 s32 rtw_xmit_tdls_coalesce(_adapter *padapter, struct xmit_frame *pxmitframe, struct tdls_txmgmt *ptxmgmt);
806 s32 update_tdls_attrib(_adapter *padapter, struct pkt_attrib *pattrib);
808 s32 _rtw_init_hw_txqueue(struct hw_txqueue* phw_txqueue, u8 ac_tag);
809 void _rtw_init_sta_xmit_priv(struct sta_xmit_priv *psta_xmitpriv);
812 s32 rtw_txframes_pending(_adapter *padapter);
813 s32 rtw_txframes_sta_ac_pending(_adapter *padapter, struct pkt_attrib *pattrib);
814 void rtw_init_hwxmits(struct hw_xmit *phwxmit, sint entry);
817 s32 _rtw_init_xmit_priv(struct xmit_priv *pxmitpriv, _adapter *padapter);
818 void _rtw_free_xmit_priv (struct xmit_priv *pxmitpriv);
821 void rtw_alloc_hwxmits(_adapter *padapter);
822 void rtw_free_hwxmits(_adapter *padapter);
825 s32 rtw_xmit(_adapter *padapter, _pkt **pkt);
826 bool xmitframe_hiq_filter(struct xmit_frame *xmitframe);
827 #if defined(CONFIG_AP_MODE) || defined(CONFIG_TDLS)
828 sint xmitframe_enqueue_for_sleeping_sta(_adapter *padapter, struct xmit_frame *pxmitframe);
829 void stop_sta_xmit(_adapter *padapter, struct sta_info *psta);
830 void wakeup_sta_to_xmit(_adapter *padapter, struct sta_info *psta);
831 void xmit_delivery_enabled_frames(_adapter *padapter, struct sta_info *psta);
834 u8 query_ra_short_GI(struct sta_info *psta);
836 u8 qos_acm(u8 acm_mask, u8 priority);
838 #ifdef CONFIG_XMIT_THREAD_MODE
839 void enqueue_pending_xmitbuf(struct xmit_priv *pxmitpriv, struct xmit_buf *pxmitbuf);
840 void enqueue_pending_xmitbuf_to_head(struct xmit_priv *pxmitpriv, struct xmit_buf *pxmitbuf);
841 struct xmit_buf* dequeue_pending_xmitbuf(struct xmit_priv *pxmitpriv);
842 struct xmit_buf* dequeue_pending_xmitbuf_under_survey(struct xmit_priv *pxmitpriv);
843 sint check_pending_xmitbuf(struct xmit_priv *pxmitpriv);
844 thread_return rtw_xmit_thread(thread_context context);
847 static void do_queue_select(_adapter * padapter, struct pkt_attrib * pattrib);
848 u32 rtw_get_ff_hwaddr(struct xmit_frame *pxmitframe);
850 #ifdef CONFIG_XMIT_ACK
851 int rtw_ack_tx_wait(struct xmit_priv *pxmitpriv, u32 timeout_ms);
852 void rtw_ack_tx_done(struct xmit_priv *pxmitpriv, int status);
853 #endif //CONFIG_XMIT_ACK
856 //include after declaring struct xmit_buf, in order to avoid warning
857 #include <xmit_osdep.h>
859 #endif //_RTL871X_XMIT_H_