diff options
Diffstat (limited to 'drivers/net/wireless/libertas/rx.c')
| -rw-r--r-- | drivers/net/wireless/libertas/rx.c | 286 |
1 files changed, 0 insertions, 286 deletions
diff --git a/drivers/net/wireless/libertas/rx.c b/drivers/net/wireless/libertas/rx.c deleted file mode 100644 index e446fed7b..000000000 --- a/drivers/net/wireless/libertas/rx.c +++ /dev/null @@ -1,286 +0,0 @@ -/* - * This file contains the handling of RX in wlan driver. - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/etherdevice.h> -#include <linux/hardirq.h> -#include <linux/slab.h> -#include <linux/types.h> -#include <linux/export.h> -#include <net/cfg80211.h> - -#include "defs.h" -#include "host.h" -#include "radiotap.h" -#include "decl.h" -#include "dev.h" -#include "mesh.h" - -struct eth803hdr { - u8 dest_addr[6]; - u8 src_addr[6]; - u16 h803_len; -} __packed; - -struct rfc1042hdr { - u8 llc_dsap; - u8 llc_ssap; - u8 llc_ctrl; - u8 snap_oui[3]; - u16 snap_type; -} __packed; - -struct rxpackethdr { - struct eth803hdr eth803_hdr; - struct rfc1042hdr rfc1042_hdr; -} __packed; - -struct rx80211packethdr { - struct rxpd rx_pd; - void *eth80211_hdr; -} __packed; - -static int process_rxed_802_11_packet(struct lbs_private *priv, - struct sk_buff *skb); - -/** - * lbs_process_rxed_packet - processes received packet and forwards it - * to kernel/upper layer - * - * @priv: A pointer to &struct lbs_private - * @skb: A pointer to skb which includes the received packet - * returns: 0 or -1 - */ -int lbs_process_rxed_packet(struct lbs_private *priv, struct sk_buff *skb) -{ - int ret = 0; - struct net_device *dev = priv->dev; - struct rxpackethdr *p_rx_pkt; - struct rxpd *p_rx_pd; - int hdrchop; - struct ethhdr *p_ethhdr; - static const u8 rfc1042_eth_hdr[] = { - 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 - }; - - lbs_deb_enter(LBS_DEB_RX); - - BUG_ON(!skb); - - skb->ip_summed = CHECKSUM_NONE; - - if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR) { - ret = process_rxed_802_11_packet(priv, skb); - goto done; - } - - p_rx_pd = (struct rxpd *) skb->data; - p_rx_pkt = (struct rxpackethdr *) ((u8 *)p_rx_pd + - le32_to_cpu(p_rx_pd->pkt_ptr)); - - dev = lbs_mesh_set_dev(priv, dev, p_rx_pd); - - lbs_deb_hex(LBS_DEB_RX, "RX Data: Before chop rxpd", skb->data, - min_t(unsigned int, skb->len, 100)); - - if (skb->len < (ETH_HLEN + 8 + sizeof(struct rxpd))) { - lbs_deb_rx("rx err: frame received with bad length\n"); - dev->stats.rx_length_errors++; - ret = -EINVAL; - dev_kfree_skb(skb); - goto done; - } - - lbs_deb_rx("rx data: skb->len - pkt_ptr = %d-%zd = %zd\n", - skb->len, (size_t)le32_to_cpu(p_rx_pd->pkt_ptr), - skb->len - (size_t)le32_to_cpu(p_rx_pd->pkt_ptr)); - - lbs_deb_hex(LBS_DEB_RX, "RX Data: Dest", p_rx_pkt->eth803_hdr.dest_addr, - sizeof(p_rx_pkt->eth803_hdr.dest_addr)); - lbs_deb_hex(LBS_DEB_RX, "RX Data: Src", p_rx_pkt->eth803_hdr.src_addr, - sizeof(p_rx_pkt->eth803_hdr.src_addr)); - - if (memcmp(&p_rx_pkt->rfc1042_hdr, - rfc1042_eth_hdr, sizeof(rfc1042_eth_hdr)) == 0) { - /* - * Replace the 803 header and rfc1042 header (llc/snap) with an - * EthernetII header, keep the src/dst and snap_type (ethertype) - * - * The firmware only passes up SNAP frames converting - * all RX Data from 802.11 to 802.2/LLC/SNAP frames. - * - * To create the Ethernet II, just move the src, dst address right - * before the snap_type. - */ - p_ethhdr = (struct ethhdr *) - ((u8 *) &p_rx_pkt->eth803_hdr - + sizeof(p_rx_pkt->eth803_hdr) + sizeof(p_rx_pkt->rfc1042_hdr) - - sizeof(p_rx_pkt->eth803_hdr.dest_addr) - - sizeof(p_rx_pkt->eth803_hdr.src_addr) - - sizeof(p_rx_pkt->rfc1042_hdr.snap_type)); - - memcpy(p_ethhdr->h_source, p_rx_pkt->eth803_hdr.src_addr, - sizeof(p_ethhdr->h_source)); - memcpy(p_ethhdr->h_dest, p_rx_pkt->eth803_hdr.dest_addr, - sizeof(p_ethhdr->h_dest)); - - /* Chop off the rxpd + the excess memory from the 802.2/llc/snap header - * that was removed - */ - hdrchop = (u8 *)p_ethhdr - (u8 *)p_rx_pd; - } else { - lbs_deb_hex(LBS_DEB_RX, "RX Data: LLC/SNAP", - (u8 *) &p_rx_pkt->rfc1042_hdr, - sizeof(p_rx_pkt->rfc1042_hdr)); - - /* Chop off the rxpd */ - hdrchop = (u8 *)&p_rx_pkt->eth803_hdr - (u8 *)p_rx_pd; - } - - /* Chop off the leading header bytes so the skb points to the start of - * either the reconstructed EthII frame or the 802.2/llc/snap frame - */ - skb_pull(skb, hdrchop); - - priv->cur_rate = lbs_fw_index_to_data_rate(p_rx_pd->rx_rate); - - lbs_deb_rx("rx data: size of actual packet %d\n", skb->len); - dev->stats.rx_bytes += skb->len; - dev->stats.rx_packets++; - - skb->protocol = eth_type_trans(skb, dev); - if (in_interrupt()) - netif_rx(skb); - else - netif_rx_ni(skb); - - ret = 0; -done: - lbs_deb_leave_args(LBS_DEB_RX, "ret %d", ret); - return ret; -} -EXPORT_SYMBOL_GPL(lbs_process_rxed_packet); - -/** - * convert_mv_rate_to_radiotap - converts Tx/Rx rates from Marvell WLAN format - * (see Table 2 in Section 3.1) to IEEE80211_RADIOTAP_RATE units (500 Kb/s) - * - * @rate: Input rate - * returns: Output Rate (0 if invalid) - */ -static u8 convert_mv_rate_to_radiotap(u8 rate) -{ - switch (rate) { - case 0: /* 1 Mbps */ - return 2; - case 1: /* 2 Mbps */ - return 4; - case 2: /* 5.5 Mbps */ - return 11; - case 3: /* 11 Mbps */ - return 22; - /* case 4: reserved */ - case 5: /* 6 Mbps */ - return 12; - case 6: /* 9 Mbps */ - return 18; - case 7: /* 12 Mbps */ - return 24; - case 8: /* 18 Mbps */ - return 36; - case 9: /* 24 Mbps */ - return 48; - case 10: /* 36 Mbps */ - return 72; - case 11: /* 48 Mbps */ - return 96; - case 12: /* 54 Mbps */ - return 108; - } - pr_alert("Invalid Marvell WLAN rate %i\n", rate); - return 0; -} - -/** - * process_rxed_802_11_packet - processes a received 802.11 packet and forwards - * it to kernel/upper layer - * - * @priv: A pointer to &struct lbs_private - * @skb: A pointer to skb which includes the received packet - * returns: 0 or -1 - */ -static int process_rxed_802_11_packet(struct lbs_private *priv, - struct sk_buff *skb) -{ - int ret = 0; - struct net_device *dev = priv->dev; - struct rx80211packethdr *p_rx_pkt; - struct rxpd *prxpd; - struct rx_radiotap_hdr radiotap_hdr; - struct rx_radiotap_hdr *pradiotap_hdr; - - lbs_deb_enter(LBS_DEB_RX); - - p_rx_pkt = (struct rx80211packethdr *) skb->data; - prxpd = &p_rx_pkt->rx_pd; - - /* lbs_deb_hex(LBS_DEB_RX, "RX Data: Before chop rxpd", skb->data, min(skb->len, 100)); */ - - if (skb->len < (ETH_HLEN + 8 + sizeof(struct rxpd))) { - lbs_deb_rx("rx err: frame received with bad length\n"); - dev->stats.rx_length_errors++; - ret = -EINVAL; - kfree_skb(skb); - goto done; - } - - lbs_deb_rx("rx data: skb->len-sizeof(RxPd) = %d-%zd = %zd\n", - skb->len, sizeof(struct rxpd), skb->len - sizeof(struct rxpd)); - - /* create the exported radio header */ - - /* radiotap header */ - memset(&radiotap_hdr, 0, sizeof(radiotap_hdr)); - /* XXX must check radiotap_hdr.hdr.it_pad for pad */ - radiotap_hdr.hdr.it_len = cpu_to_le16 (sizeof(struct rx_radiotap_hdr)); - radiotap_hdr.hdr.it_present = cpu_to_le32 (RX_RADIOTAP_PRESENT); - radiotap_hdr.rate = convert_mv_rate_to_radiotap(prxpd->rx_rate); - /* XXX must check no carryout */ - radiotap_hdr.antsignal = prxpd->snr + prxpd->nf; - - /* chop the rxpd */ - skb_pull(skb, sizeof(struct rxpd)); - - /* add space for the new radio header */ - if ((skb_headroom(skb) < sizeof(struct rx_radiotap_hdr)) && - pskb_expand_head(skb, sizeof(struct rx_radiotap_hdr), 0, GFP_ATOMIC)) { - netdev_alert(dev, "%s: couldn't pskb_expand_head\n", __func__); - ret = -ENOMEM; - kfree_skb(skb); - goto done; - } - - pradiotap_hdr = (void *)skb_push(skb, sizeof(struct rx_radiotap_hdr)); - memcpy(pradiotap_hdr, &radiotap_hdr, sizeof(struct rx_radiotap_hdr)); - - priv->cur_rate = lbs_fw_index_to_data_rate(prxpd->rx_rate); - - lbs_deb_rx("rx data: size of actual packet %d\n", skb->len); - dev->stats.rx_bytes += skb->len; - dev->stats.rx_packets++; - - skb->protocol = eth_type_trans(skb, priv->dev); - - if (in_interrupt()) - netif_rx(skb); - else - netif_rx_ni(skb); - - ret = 0; - -done: - lbs_deb_leave_args(LBS_DEB_RX, "ret %d", ret); - return ret; -} |