From b795affe0662c01f29b91bfacc17d8ab4978c999 Mon Sep 17 00:00:00 2001 From: Nicolas Thill Date: Wed, 7 Oct 2009 16:03:31 +0000 Subject: libertas: use driver from compat-wireless instead of our own (deprecated) one SVN-Revision: 17982 --- package/libertas/src/rx.c | 403 ---------------------------------------------- 1 file changed, 403 deletions(-) delete mode 100644 package/libertas/src/rx.c (limited to 'package/libertas/src/rx.c') diff --git a/package/libertas/src/rx.c b/package/libertas/src/rx.c deleted file mode 100644 index 05af7316f6..0000000000 --- a/package/libertas/src/rx.c +++ /dev/null @@ -1,403 +0,0 @@ -/** - * This file contains the handling of RX in wlan driver. - */ -#include -#include - -#include "hostcmd.h" -#include "radiotap.h" -#include "decl.h" -#include "dev.h" -#include "wext.h" - -struct eth803hdr { - u8 dest_addr[6]; - u8 src_addr[6]; - u16 h803_len; -} __attribute__ ((packed)); - -struct rfc1042hdr { - u8 llc_dsap; - u8 llc_ssap; - u8 llc_ctrl; - u8 snap_oui[3]; - u16 snap_type; -} __attribute__ ((packed)); - -struct rxpackethdr { - struct rxpd rx_pd; - struct eth803hdr eth803_hdr; - struct rfc1042hdr rfc1042_hdr; -} __attribute__ ((packed)); - -struct rx80211packethdr { - struct rxpd rx_pd; - void *eth80211_hdr; -} __attribute__ ((packed)); - -static int process_rxed_802_11_packet(struct lbs_private *priv, - struct sk_buff *skb); - -/** - * @brief This function computes the avgSNR . - * - * @param priv A pointer to struct lbs_private structure - * @return avgSNR - */ -static u8 lbs_getavgsnr(struct lbs_private *priv) -{ - u8 i; - u16 temp = 0; - if (priv->numSNRNF == 0) - return 0; - for (i = 0; i < priv->numSNRNF; i++) - temp += priv->rawSNR[i]; - return (u8) (temp / priv->numSNRNF); - -} - -/** - * @brief This function computes the AvgNF - * - * @param priv A pointer to struct lbs_private structure - * @return AvgNF - */ -static u8 lbs_getavgnf(struct lbs_private *priv) -{ - u8 i; - u16 temp = 0; - if (priv->numSNRNF == 0) - return 0; - for (i = 0; i < priv->numSNRNF; i++) - temp += priv->rawNF[i]; - return (u8) (temp / priv->numSNRNF); - -} - -/** - * @brief This function save the raw SNR/NF to our internel buffer - * - * @param priv A pointer to struct lbs_private structure - * @param prxpd A pointer to rxpd structure of received packet - * @return n/a - */ -static void lbs_save_rawSNRNF(struct lbs_private *priv, struct rxpd *p_rx_pd) -{ - if (priv->numSNRNF < DEFAULT_DATA_AVG_FACTOR) - priv->numSNRNF++; - priv->rawSNR[priv->nextSNRNF] = p_rx_pd->snr; - priv->rawNF[priv->nextSNRNF] = p_rx_pd->nf; - priv->nextSNRNF++; - if (priv->nextSNRNF >= DEFAULT_DATA_AVG_FACTOR) - priv->nextSNRNF = 0; - return; -} - -/** - * @brief This function computes the RSSI in received packet. - * - * @param priv A pointer to struct lbs_private structure - * @param prxpd A pointer to rxpd structure of received packet - * @return n/a - */ -static void lbs_compute_rssi(struct lbs_private *priv, struct rxpd *p_rx_pd) -{ - - lbs_deb_enter(LBS_DEB_RX); - - lbs_deb_rx("rxpd: SNR %d, NF %d\n", p_rx_pd->snr, p_rx_pd->nf); - lbs_deb_rx("before computing SNR: SNR-avg = %d, NF-avg = %d\n", - priv->SNR[TYPE_RXPD][TYPE_AVG] / AVG_SCALE, - priv->NF[TYPE_RXPD][TYPE_AVG] / AVG_SCALE); - - priv->SNR[TYPE_RXPD][TYPE_NOAVG] = p_rx_pd->snr; - priv->NF[TYPE_RXPD][TYPE_NOAVG] = p_rx_pd->nf; - lbs_save_rawSNRNF(priv, p_rx_pd); - - priv->SNR[TYPE_RXPD][TYPE_AVG] = lbs_getavgsnr(priv) * AVG_SCALE; - priv->NF[TYPE_RXPD][TYPE_AVG] = lbs_getavgnf(priv) * AVG_SCALE; - lbs_deb_rx("after computing SNR: SNR-avg = %d, NF-avg = %d\n", - priv->SNR[TYPE_RXPD][TYPE_AVG] / AVG_SCALE, - priv->NF[TYPE_RXPD][TYPE_AVG] / AVG_SCALE); - - priv->RSSI[TYPE_RXPD][TYPE_NOAVG] = - CAL_RSSI(priv->SNR[TYPE_RXPD][TYPE_NOAVG], - priv->NF[TYPE_RXPD][TYPE_NOAVG]); - - priv->RSSI[TYPE_RXPD][TYPE_AVG] = - CAL_RSSI(priv->SNR[TYPE_RXPD][TYPE_AVG] / AVG_SCALE, - priv->NF[TYPE_RXPD][TYPE_AVG] / AVG_SCALE); - - lbs_deb_leave(LBS_DEB_RX); -} - -/** - * @brief This function processes received packet and forwards it - * to kernel/upper layer - * - * @param priv A pointer to struct lbs_private - * @param skb A pointer to skb which includes the received packet - * @return 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; - 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->monitormode) - return process_rxed_802_11_packet(priv, skb); - - p_rx_pkt = (struct rxpackethdr *) skb->data; - p_rx_pd = &p_rx_pkt->rx_pd; - if (priv->mesh_dev && (p_rx_pd->rx_control & RxPD_MESH_FRAME)) - dev = priv->mesh_dev; - - 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"); - priv->stats.rx_length_errors++; - ret = 0; - goto done; - } - - /* - * Check rxpd status and update 802.3 stat, - */ - if (!(p_rx_pd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK))) { - lbs_deb_rx("rx err: frame received with bad status\n"); - lbs_pr_alert("rxpd not ok\n"); - priv->stats.rx_errors++; - ret = 0; - 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)); - - 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_pkt; - } 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_pkt; - } - - /* 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); - - /* Take the data rate from the rxpd structure - * only if the rate is auto - */ - if (priv->auto_rate) - priv->cur_rate = lbs_fw_index_to_data_rate(p_rx_pd->rx_rate); - - lbs_compute_rssi(priv, p_rx_pd); - - lbs_deb_rx("rx data: size of actual packet %d\n", skb->len); - priv->stats.rx_bytes += skb->len; - priv->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); - -/** - * @brief This function converts Tx/Rx rates from the Marvell WLAN format - * (see Table 2 in Section 3.1) to IEEE80211_RADIOTAP_RATE units (500 Kb/s) - * - * @param rate Input rate - * @return 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; - } - lbs_pr_alert("Invalid Marvell WLAN rate %i\n", rate); - return 0; -} - -/** - * @brief This function processes a received 802.11 packet and forwards it - * to kernel/upper layer - * - * @param priv A pointer to struct lbs_private - * @param skb A pointer to skb which includes the received packet - * @return 0 or -1 - */ -static int process_rxed_802_11_packet(struct lbs_private *priv, - struct sk_buff *skb) -{ - int ret = 0; - - 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"); - priv->stats.rx_length_errors++; - ret = -EINVAL; - kfree(skb); - goto done; - } - - /* - * Check rxpd status and update 802.3 stat, - */ - if (!(prxpd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK))) { - //lbs_deb_rx("rx err: frame received with bad status\n"); - priv->stats.rx_errors++; - } - - 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 */ - radiotap_hdr.hdr.it_version = 0; - /* XXX must check this value for pad */ - radiotap_hdr.hdr.it_pad = 0; - radiotap_hdr.hdr.it_len = cpu_to_le16 (sizeof(struct rx_radiotap_hdr)); - radiotap_hdr.hdr.it_present = cpu_to_le32 (RX_RADIOTAP_PRESENT); - /* unknown values */ - radiotap_hdr.flags = 0; - radiotap_hdr.chan_freq = 0; - radiotap_hdr.chan_flags = 0; - radiotap_hdr.antenna = 0; - /* known values */ - radiotap_hdr.rate = convert_mv_rate_to_radiotap(prxpd->rx_rate); - /* XXX must check no carryout */ - radiotap_hdr.antsignal = prxpd->snr + prxpd->nf; - radiotap_hdr.rx_flags = 0; - if (!(prxpd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK))) - radiotap_hdr.rx_flags |= IEEE80211_RADIOTAP_F_RX_BADFCS; - //memset(radiotap_hdr.pad, 0x11, IEEE80211_RADIOTAP_HDRLEN - 18); - - /* 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)) { - lbs_pr_alert("%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)); - - /* Take the data rate from the rxpd structure - * only if the rate is auto - */ - if (priv->auto_rate) - priv->cur_rate = lbs_fw_index_to_data_rate(prxpd->rx_rate); - - lbs_compute_rssi(priv, prxpd); - - lbs_deb_rx("rx data: size of actual packet %d\n", skb->len); - priv->stats.rx_bytes += skb->len; - priv->stats.rx_packets++; - - skb->protocol = eth_type_trans(skb, priv->rtap_net_dev); - netif_rx(skb); - - ret = 0; - -done: - lbs_deb_leave_args(LBS_DEB_RX, "ret %d", ret); - return ret; -} -- cgit v1.2.3