drivers/staging/rtl8723bs/os_dep/xmit_linux.c

Source file repositories/reference/linux-study-clean/drivers/staging/rtl8723bs/os_dep/xmit_linux.c

File Facts

System
Linux kernel
Corpus path
drivers/staging/rtl8723bs/os_dep/xmit_linux.c
Extension
.c
Size
5811 bytes
Lines
224
Domain
Driver Families
Bucket
drivers/staging
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (pxmitpriv->free_xmitframe_cnt <= 4) {
			if (!netif_tx_queue_stopped(netdev_get_tx_queue(padapter->pnetdev, queue)))
				netif_stop_subqueue(padapter->pnetdev, queue);
		}
	}
}

static int rtw_mlcst2unicst(struct adapter *padapter, struct sk_buff *skb)
{
	struct	sta_priv *pstapriv = &padapter->stapriv;
	struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
	struct list_head	*phead, *plist;
	struct sk_buff *newskb;
	struct sta_info *psta = NULL;
	u8 chk_alive_num = 0;
	char chk_alive_list[NUM_STA];
	u8 bc_addr[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
	u8 null_addr[6] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};

	int i;
	s32	res;

	spin_lock_bh(&pstapriv->asoc_list_lock);
	phead = &pstapriv->asoc_list;
	/* free sta asoc_queue */
	list_for_each(plist, phead) {
		int stainfo_offset;

		psta = list_entry(plist, struct sta_info, asoc_list);

		stainfo_offset = rtw_stainfo_offset(pstapriv, psta);
		if (stainfo_offset_valid(stainfo_offset))
			chk_alive_list[chk_alive_num++] = stainfo_offset;
	}
	spin_unlock_bh(&pstapriv->asoc_list_lock);

	for (i = 0; i < chk_alive_num; i++) {
		psta = rtw_get_stainfo_by_offset(pstapriv, chk_alive_list[i]);
		if (!(psta->state & _FW_LINKED))
			continue;

		/* avoid come from STA1 and send back STA1 */
		if (!memcmp(psta->hwaddr, &skb->data[6], 6) ||
		    !memcmp(psta->hwaddr, null_addr, 6) ||
		    !memcmp(psta->hwaddr, bc_addr, 6))
			continue;

		newskb = skb_copy(skb, GFP_ATOMIC);
		if (newskb) {
			memcpy(newskb->data, psta->hwaddr, 6);
			res = rtw_xmit(padapter, &newskb);
			if (res < 0) {
				pxmitpriv->tx_drop++;
				dev_kfree_skb_any(newskb);
			}
		} else {
			pxmitpriv->tx_drop++;
			/* dev_kfree_skb_any(skb); */
			return false;	/*  Caller shall tx this multicast frame via normal way. */
		}
	}

	dev_kfree_skb_any(skb);
	return true;
}

void _rtw_xmit_entry(struct sk_buff *pkt, struct net_device *pnetdev)
{
	struct adapter *padapter = rtw_netdev_priv(pnetdev);
	struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
	struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
	s32 res = 0;

	if (rtw_if_up(padapter) == false)
		goto drop_packet;

	rtw_check_xmit_resource(padapter, pkt);

	if (!rtw_mc2u_disable && check_fwstate(pmlmepriv, WIFI_AP_STATE) &&
	    (IP_MCAST_MAC(pkt->data) || ICMPV6_MCAST_MAC(pkt->data)) &&
	    !padapter->registrypriv.wifi_spec) {
		if (pxmitpriv->free_xmitframe_cnt > (NR_XMITFRAME / 4)) {
			res = rtw_mlcst2unicst(padapter, pkt);
			if (res)
				return;
		}
	}

	res = rtw_xmit(padapter, &pkt);
	if (res < 0)

Annotation

Implementation Notes