linux/drivers/staging/rtl8712/rtl871x_xmit.c

// SPDX-License-Identifier: GPL-2.0
/******************************************************************************
 * rtl871x_xmit.c
 *
 * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
 * Linux device driver for RTL8192SU
 *
 * Modifications for inclusion into the Linux staging tree are
 * Copyright(c) 2010 Larry Finger. All rights reserved.
 *
 * Contact information:
 * WLAN FAE <[email protected]>
 * Larry Finger <[email protected]>
 *
 ******************************************************************************/

#define _RTL871X_XMIT_C_

#include "osdep_service.h"
#include "drv_types.h"
#include "osdep_intf.h"
#include "usb_ops.h"

#include <linux/usb.h>
#include <linux/ieee80211.h>

static const u8 P802_1H_OUI[P80211_OUI_LEN] = …;
static const u8 RFC1042_OUI[P80211_OUI_LEN] = …;
static void init_hwxmits(struct hw_xmit *phwxmit, sint entry);
static void alloc_hwxmits(struct _adapter *padapter);
static void free_hwxmits(struct _adapter *padapter);

static void _init_txservq(struct tx_servq *ptxservq)
{ … }

void _r8712_init_sta_xmit_priv(struct sta_xmit_priv *psta_xmitpriv)
{ … }

int _r8712_init_xmit_priv(struct xmit_priv *pxmitpriv,
			  struct _adapter *padapter)
{ … }

void _free_xmit_priv(struct xmit_priv *pxmitpriv)
{ … }

int r8712_update_attrib(struct _adapter *padapter, _pkt *pkt,
			struct pkt_attrib *pattrib)
{ … }

static int xmitframe_addmic(struct _adapter *padapter,
			    struct xmit_frame *pxmitframe)
{ … }

static sint xmitframe_swencrypt(struct _adapter *padapter,
				struct xmit_frame *pxmitframe)
{ … }

static int make_wlanhdr(struct _adapter *padapter, u8 *hdr,
			struct pkt_attrib *pattrib)
{ … }

static sint r8712_put_snap(u8 *data, u16 h_proto)
{ … }

/*
 * This sub-routine will perform all the following:
 * 1. remove 802.3 header.
 * 2. create wlan_header, based on the info in pxmitframe
 * 3. append sta's iv/ext-iv
 * 4. append LLC
 * 5. move frag chunk from pframe to pxmitframe->mem
 * 6. apply sw-encrypt, if necessary.
 */
sint r8712_xmitframe_coalesce(struct _adapter *padapter, _pkt *pkt,
			struct xmit_frame *pxmitframe)
{ … }

void r8712_update_protection(struct _adapter *padapter, u8 *ie, uint ie_len)
{ … }

struct xmit_buf *r8712_alloc_xmitbuf(struct xmit_priv *pxmitpriv)
{ … }

void r8712_free_xmitbuf(struct xmit_priv *pxmitpriv, struct xmit_buf *pxmitbuf)
{ … }

/*
 * Calling context:
 * 1. OS_TXENTRY
 * 2. RXENTRY (rx_thread or RX_ISR/RX_CallBack)
 *
 * If we turn on USE_RXTHREAD, then, no need for critical section.
 * Otherwise, we must use _enter/_exit critical to protect free_xmit_queue...
 *
 * Must be very very cautious...
 *
 */
struct xmit_frame *r8712_alloc_xmitframe(struct xmit_priv *pxmitpriv)
{ … }

void r8712_free_xmitframe(struct xmit_priv *pxmitpriv,
			  struct xmit_frame *pxmitframe)
{ … }

void r8712_free_xmitframe_ex(struct xmit_priv *pxmitpriv,
		      struct xmit_frame *pxmitframe)
{ … }

void r8712_free_xmitframe_queue(struct xmit_priv *pxmitpriv,
				struct  __queue *pframequeue)
{ … }

static inline struct tx_servq *get_sta_pending(struct _adapter *padapter,
					       struct  __queue **ppstapending,
					       struct sta_info *psta, sint up)
{ … }

/*
 * Will enqueue pxmitframe to the proper queue, and indicate it
 * to xx_pending list.....
 */
int r8712_xmit_classifier(struct _adapter *padapter,
			  struct xmit_frame *pxmitframe)
{ … }

static void alloc_hwxmits(struct _adapter *padapter)
{ … }

static void free_hwxmits(struct _adapter *padapter)
{ … }

static void init_hwxmits(struct hw_xmit *phwxmit, sint entry)
{ … }

void xmitframe_xmitbuf_attach(struct xmit_frame *pxmitframe,
			struct xmit_buf *pxmitbuf)
{ … }

/*
 * tx_action == 0 == no frames to transmit
 * tx_action > 0 ==> we have frames to transmit
 * tx_action < 0 ==> we have frames to transmit, but TXFF is not even enough
 *						 to transmit 1 frame.
 */

int r8712_pre_xmit(struct _adapter *padapter, struct xmit_frame *pxmitframe)
{ … }