staging: r8712u: Add the new driver to the mainline kernel

This code is for a completely new version of the Realtek 8192 USB devices
such as the D-Link DWA-130. The Realtek code, which was originally for
Linux, Windows XP and Windows CE, has been stripped of all code not needed
for Linux. In addition, only one additional configuration variable, which
enables AP mode, remains.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Florian Schilhabel <florian.c.schilhabel@googlemail.com>
Tested-by: Frederic Leroy <fredo@starox.org>

1 files changed, 330 insertions, 0 deletions

diff --git a/drivers/staging/rtl8712/rtl871x_recv.h b/drivers/staging/rtl8712/rtl871x_recv.h
new file mode 100644
index 000000000000..bf8115dbcb61
--- /dev/null
+++ b/drivers/staging/rtl8712/rtl871x_recv.h
@@ -0,0 +1,330 @@
+#ifndef _RTL871X_RECV_H_
+#define _RTL871X_RECV_H_
+
+#include "osdep_service.h"
+#include "drv_types.h"
+
+#define NR_RECVFRAME 256
+
+#define RXFRAME_ALIGN	8
+#define RXFRAME_ALIGN_SZ	(1 << RXFRAME_ALIGN)
+
+#define MAX_RXFRAME_CNT	512
+#define MAX_RX_NUMBLKS		(32)
+#define RECVFRAME_HDR_ALIGN 128
+#define MAX_SUBFRAME_COUNT	64
+
+#define SNAP_SIZE sizeof(struct ieee80211_snap_hdr)
+
+/* for Rx reordering buffer control */
+struct recv_reorder_ctrl {
+	struct _adapter	*padapter;
+	u16 indicate_seq;/* =wstart_b, init_value=0xffff */
+	u16 wend_b;
+       u8 wsize_b;
+	struct  __queue pending_recvframe_queue;
+	struct timer_list reordering_ctrl_timer;
+};
+
+struct	stainfo_rxcache	{
+	u16	tid_rxseq[16];
+};
+
+#define		PHY_RSSI_SLID_WIN_MAX			100
+#define		PHY_LINKQUALITY_SLID_WIN_MAX		20
+
+
+struct smooth_rssi_data {
+	u32	elements[100];	/* array to store values */
+	u32	index;		/* index to current array to store */
+	u32	total_num;	/* num of valid elements */
+	u32	total_val;	/* sum of valid elements */
+};
+
+struct rx_pkt_attrib {
+
+	u8	amsdu;
+	u8	order;
+	u8	qos;
+	u8	to_fr_ds;
+	u8	frag_num;
+	u16	seq_num;
+	u8   pw_save;
+	u8    mfrag;
+	u8    mdata;
+	u8	privacy; /* in frame_ctrl field */
+	u8	bdecrypted;
+	int	hdrlen;	 /* the WLAN Header Len */
+	int	encrypt; /* 0 no encrypt. != 0 encrypt algorith */
+	int	iv_len;
+	int	icv_len;
+	int	priority;
+	int	ack_policy;
+	u8	crc_err;
+	u8	dst[ETH_ALEN];
+	u8	src[ETH_ALEN];
+	u8	ta[ETH_ALEN];
+	u8	ra[ETH_ALEN];
+	u8	bssid[ETH_ALEN];
+	u8	tcpchk_valid; /* 0: invalid, 1: valid */
+	u8	ip_chkrpt; /* 0: incorrect, 1: correct */
+	u8	tcp_chkrpt; /* 0: incorrect, 1: correct */
+	u8	signal_qual;
+	s8	rx_mimo_signal_qual[2];
+	u8	mcs_rate;
+	u8	htc;
+	u8	signal_strength;
+};
+
+/*
+accesser of recv_priv: recv_entry(dispatch / passive level);
+recv_thread(passive) ; returnpkt(dispatch)
+; halt(passive) ;
+
+using enter_critical section to protect
+*/
+struct recv_priv {
+	spinlock_t lock;
+	struct semaphore recv_sema;
+	struct semaphore terminate_recvthread_sema;
+	struct  __queue	free_recv_queue;
+	struct  __queue	recv_pending_queue;
+	u8 *pallocated_frame_buf;
+	u8 *precv_frame_buf;
+	uint free_recvframe_cnt;
+	struct _adapter	*adapter;
+	uint	rx_bytes;
+	uint	rx_pkts;
+	uint	rx_drop;
+	uint  rx_icv_err;
+	uint  rx_largepacket_crcerr;
+	uint  rx_smallpacket_crcerr;
+	uint  rx_middlepacket_crcerr;
+	struct semaphore allrxreturnevt;
+	u8  rx_pending_cnt;
+	uint	ff_hwaddr;
+	struct tasklet_struct recv_tasklet;
+	struct sk_buff_head free_recv_skb_queue;
+	struct sk_buff_head rx_skb_queue;
+	u8 *pallocated_recv_buf;
+	u8 *precv_buf;    /* 4 alignment */
+	struct  __queue	free_recv_buf_queue;
+	u32	free_recv_buf_queue_cnt;
+	/* For the phy informatiom */
+	s8 rssi;
+	u8 signal;
+	u8 noise;
+	u8 fw_rssi;
+	struct smooth_rssi_data signal_qual_data;
+	struct smooth_rssi_data signal_strength_data;
+};
+
+struct sta_recv_priv {
+	spinlock_t lock;
+	sint	option;
+	struct  __queue defrag_q; /* keeping the fragment frame until defrag */
+	struct	stainfo_rxcache rxcache;
+	uint	sta_rx_bytes;
+	uint	sta_rx_pkts;
+	uint	sta_rx_fail;
+};
+
+#include "rtl8712_recv.h"
+
+/* get a free recv_frame from pfree_recv_queue */
+union recv_frame *r8712_alloc_recvframe(struct  __queue *pfree_recv_queue);
+union recv_frame *r8712_dequeue_recvframe(struct  __queue *queue);
+int r8712_enqueue_recvframe(union recv_frame *precvframe,
+			     struct  __queue *queue);
+int r8712_free_recvframe(union recv_frame *precvframe,
+			  struct  __queue *pfree_recv_queue);
+void r8712_free_recvframe_queue(struct  __queue *pframequeue,
+				 struct  __queue *pfree_recv_queue);
+void r8712_init_recvframe(union recv_frame *precvframe,
+			   struct recv_priv *precvpriv);
+int r8712_wlanhdr_to_ethhdr(union recv_frame *precvframe);
+int recv_func(struct _adapter *padapter, void *pcontext);
+
+static inline u8 *get_rxmem(union recv_frame *precvframe)
+{
+	/* always return rx_head... */
+	if (precvframe == NULL)
+		return NULL;
+	return precvframe->u.hdr.rx_head;
+}
+
+static inline u8 *get_rx_status(union recv_frame *precvframe)
+{
+	return get_rxmem(precvframe);
+}
+
+static inline u8 *get_recvframe_data(union recv_frame *precvframe)
+{
+	/* always return rx_data */
+	if (precvframe == NULL)
+		return NULL;
+	return precvframe->u.hdr.rx_data;
+}
+
+static inline u8 *recvframe_push(union recv_frame *precvframe, sint sz)
+{
+	/* append data before rx_data */
+
+	/* add data to the start of recv_frame
+	 *
+	 * This function extends the used data area of the recv_frame at the
+	 * buffer start. rx_data must be still larger than rx_head, after
+	 * pushing.
+	 */
+
+	if (precvframe == NULL)
+		return NULL;
+	precvframe->u.hdr.rx_data -= sz ;
+	if (precvframe->u.hdr.rx_data < precvframe->u.hdr.rx_head) {
+		precvframe->u.hdr.rx_data += sz ;
+		return NULL;
+	}
+	precvframe->u.hdr.len += sz;
+	return precvframe->u.hdr.rx_data;
+}
+
+static inline u8 *recvframe_pull(union recv_frame *precvframe, sint sz)
+{
+	/* used for extract sz bytes from rx_data, update rx_data and return
+	 *  the updated rx_data to the caller */
+	if (precvframe == NULL)
+		return NULL;
+	precvframe->u.hdr.rx_data += sz;
+	if (precvframe->u.hdr.rx_data > precvframe->u.hdr.rx_tail) {
+		precvframe->u.hdr.rx_data -= sz;
+		return NULL;
+	}
+	precvframe->u.hdr.len -= sz;
+	return precvframe->u.hdr.rx_data;
+}
+
+static inline u8 *recvframe_put(union recv_frame *precvframe, sint sz)
+{
+	/* used for append sz bytes from ptr to rx_tail, update rx_tail and
+	 * return the updated rx_tail to the caller
+	 * after putting, rx_tail must be still larger than rx_end. */
+	unsigned char *prev_rx_tail;
+
+	if (precvframe == NULL)
+		return NULL;
+	prev_rx_tail = precvframe->u.hdr.rx_tail;
+	precvframe->u.hdr.rx_tail += sz;
+	if (precvframe->u.hdr.rx_tail > precvframe->u.hdr.rx_end) {
+		precvframe->u.hdr.rx_tail -= sz;
+		return NULL;
+	}
+	precvframe->u.hdr.len += sz;
+	return precvframe->u.hdr.rx_tail;
+}
+
+static inline u8 *recvframe_pull_tail(union recv_frame *precvframe, sint sz)
+{
+	/* rmv data from rx_tail (by yitsen)
+	 * used for extract sz bytes from rx_end, update rx_end and return the
+	 * updated rx_end to the caller
+	 * after pulling, rx_end must be still larger than rx_data. */
+	if (precvframe == NULL)
+		return NULL;
+	precvframe->u.hdr.rx_tail -= sz;
+	if (precvframe->u.hdr.rx_tail < precvframe->u.hdr.rx_data) {
+		precvframe->u.hdr.rx_tail += sz;
+		return NULL;
+	}
+	precvframe->u.hdr.len -= sz;
+	return precvframe->u.hdr.rx_tail;
+}
+
+static inline _buffer *get_rxbuf_desc(union recv_frame *precvframe)
+{
+	_buffer *buf_desc;
+	if (precvframe == NULL)
+		return NULL;
+	return buf_desc;
+}
+
+static inline union recv_frame *rxmem_to_recvframe(u8 *rxmem)
+{
+	/* due to the design of 2048 bytes alignment of recv_frame, we can
+	 * reference the union recv_frame from any given member of recv_frame.
+	 * rxmem indicates the any member/address in recv_frame */
+	return (union recv_frame *)(((addr_t)rxmem >> RXFRAME_ALIGN) <<
+				  RXFRAME_ALIGN);
+}
+
+static inline union recv_frame *pkt_to_recvframe(_pkt *pkt)
+{
+	u8 *buf_star;
+	union recv_frame *precv_frame;
+
+	precv_frame = rxmem_to_recvframe((unsigned char *)buf_star);
+	return precv_frame;
+}
+
+static inline u8 *pkt_to_recvmem(_pkt *pkt)
+{
+	/* return the rx_head */
+	union recv_frame *precv_frame = pkt_to_recvframe(pkt);
+
+	return	precv_frame->u.hdr.rx_head;
+}
+
+static inline u8 *pkt_to_recvdata(_pkt *pkt)
+{
+	/* return the rx_data */
+	union recv_frame *precv_frame = pkt_to_recvframe(pkt);
+
+	return	precv_frame->u.hdr.rx_data;
+}
+
+static inline sint get_recvframe_len(union recv_frame *precvframe)
+{
+	return precvframe->u.hdr.len;
+}
+
+struct sta_info;
+
+void	_r8712_init_sta_recv_priv(struct sta_recv_priv *psta_recvpriv);
+sint r8712_recvframe_chkmic(struct _adapter *adapter,
+			    union recv_frame *precvframe);
+union recv_frame *r8712_decryptor(struct _adapter *adapter,
+				  union recv_frame *precv_frame);
+union recv_frame *r8712_recvframe_chk_defrag(struct _adapter *adapter,
+					     union recv_frame *precv_frame);
+union recv_frame *r8712_recvframe_defrag(struct _adapter *adapter,
+					 struct  __queue *defrag_q);
+union recv_frame *r8712_recvframe_chk_defrag_new(struct _adapter *adapter,
+					union recv_frame *precv_frame);
+union recv_frame *r8712_recvframe_defrag_new(struct _adapter *adapter,
+					struct  __queue *defrag_q,
+					union recv_frame *precv_frame);
+int r8712_recv_decache(union recv_frame *precv_frame, u8 bretry,
+		       struct stainfo_rxcache *prxcache);
+int r8712_sta2sta_data_frame(struct _adapter *adapter,
+			     union recv_frame *precv_frame,
+			     struct sta_info **psta);
+int r8712_ap2sta_data_frame(struct _adapter *adapter,
+			    union recv_frame *precv_frame,
+			    struct sta_info **psta);
+int r8712_sta2ap_data_frame(struct _adapter *adapter,
+			    union recv_frame *precv_frame,
+			    struct sta_info **psta);
+int r8712_validate_recv_ctrl_frame(struct _adapter *adapter,
+				   union recv_frame *precv_frame);
+int r8712_validate_recv_mgnt_frame(struct _adapter *adapter,
+				   union recv_frame *precv_frame);
+int r8712_validate_recv_data_frame(struct _adapter *adapter,
+				   union recv_frame *precv_frame);
+int r8712_validate_recv_frame(struct _adapter *adapter,
+			      union recv_frame *precv_frame);
+union recv_frame *r8712_portctrl(struct _adapter *adapter,
+				 union recv_frame *precv_frame);
+void  r8712_mgt_dispatcher(struct _adapter *padapter, u8 *pframe, uint len);
+int r8712_amsdu_to_msdu(struct _adapter *padapter, union recv_frame *prframe);
+
+#endif
+