From: Michael Buesch Date: Thu, 23 Feb 2006 20:15:39 +0000 (+0100) Subject: [PATCH] bcm43xx: Move TX/RX related functions to its own file. Add basic RTS/CTS... X-Git-Tag: v2.6.17-rc1~158^2~34 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f398f02d12cdc372e16c5e86246b10acf7211abc;p=linux-2.6 [PATCH] bcm43xx: Move TX/RX related functions to its own file. Add basic RTS/CTS code. Signed-off-by: Michael Buesch Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/bcm43xx/Makefile b/drivers/net/wireless/bcm43xx/Makefile index c87c1525b3..2962b5f9e3 100644 --- a/drivers/net/wireless/bcm43xx/Makefile +++ b/drivers/net/wireless/bcm43xx/Makefile @@ -8,4 +8,5 @@ bcm43xx-objs := bcm43xx_main.o bcm43xx_ilt.o \ bcm43xx_radio.o bcm43xx_phy.o \ bcm43xx_power.o bcm43xx_wx.o \ bcm43xx_leds.o bcm43xx_ethtool.o \ + bcm43xx_xmit.o \ $(bcm43xx-obj-y) diff --git a/drivers/net/wireless/bcm43xx/bcm43xx.h b/drivers/net/wireless/bcm43xx/bcm43xx.h index 848717513b..21c75cae14 100644 --- a/drivers/net/wireless/bcm43xx/bcm43xx.h +++ b/drivers/net/wireless/bcm43xx/bcm43xx.h @@ -314,23 +314,6 @@ /* Initial default iw_mode */ #define BCM43xx_INITIAL_IWMODE IW_MODE_INFRA -/* Values/Masks for the device TX header */ -#define BCM43xx_TXHDRFLAG_EXPECTACK 0x0001 -#define BCM43xx_TXHDRFLAG_FIRSTFRAGMENT 0x0008 -#define BCM43xx_TXHDRFLAG_DESTPSMODE 0x0020 -#define BCM43xx_TXHDRFLAG_FALLBACKOFDM 0x0100 -#define BCM43xx_TXHDRFLAG_FRAMEBURST 0x0800 - -#define BCM43xx_TXHDRCTL_OFDM 0x0001 -#define BCM43xx_TXHDRCTL_SHORT_PREAMBLE 0x0010 -#define BCM43xx_TXHDRCTL_ANTENNADIV_MASK 0x0030 -#define BCM43xx_TXHDRCTL_ANTENNADIV_SHIFT 8 - -#define BCM43xx_TXHDR_WSEC_KEYINDEX_MASK 0x00F0 -#define BCM43xx_TXHDR_WSEC_KEYINDEX_SHIFT 4 -#define BCM43xx_TXHDR_WSEC_ALGO_MASK 0x0003 -#define BCM43xx_TXHDR_WSEC_ALGO_SHIFT 0 - /* Bus type PCI. */ #define BCM43xx_BUSTYPE_PCI 0 /* Bus type Silicone Backplane Bus. */ @@ -952,4 +935,10 @@ int bcm43xx_pci_write_config32(struct bcm43xx_private *bcm, int offset, u32 valu __value; \ }) +/** Helpers to print MAC addresses. */ +#define BCM43xx_MACFMT "%02x:%02x:%02x:%02x:%02x:%02x" +#define BCM43xx_MACARG(x) ((u8*)(x))[0], ((u8*)(x))[1], \ + ((u8*)(x))[2], ((u8*)(x))[3], \ + ((u8*)(x))[4], ((u8*)(x))[5] + #endif /* BCM43xx_H_ */ diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_debugfs.c b/drivers/net/wireless/bcm43xx/bcm43xx_debugfs.c index 5a7dc43cd6..0bae0be4be 100644 --- a/drivers/net/wireless/bcm43xx/bcm43xx_debugfs.c +++ b/drivers/net/wireless/bcm43xx/bcm43xx_debugfs.c @@ -37,6 +37,7 @@ #include "bcm43xx_debugfs.h" #include "bcm43xx_dma.h" #include "bcm43xx_pio.h" +#include "bcm43xx_xmit.h" #define REALLY_BIG_BUFFER_SIZE (1024*256) diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_dma.c b/drivers/net/wireless/bcm43xx/bcm43xx_dma.c index af5c27f9bf..e20fbaf29e 100644 --- a/drivers/net/wireless/bcm43xx/bcm43xx_dma.c +++ b/drivers/net/wireless/bcm43xx/bcm43xx_dma.c @@ -32,6 +32,7 @@ #include "bcm43xx_main.h" #include "bcm43xx_debugfs.h" #include "bcm43xx_power.h" +#include "bcm43xx_xmit.h" #include #include diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_main.c b/drivers/net/wireless/bcm43xx/bcm43xx_main.c index 899c06fe0b..f1ac9940f1 100644 --- a/drivers/net/wireless/bcm43xx/bcm43xx_main.c +++ b/drivers/net/wireless/bcm43xx/bcm43xx_main.c @@ -50,6 +50,7 @@ #include "bcm43xx_power.h" #include "bcm43xx_wx.h" #include "bcm43xx_ethtool.h" +#include "bcm43xx_xmit.h" MODULE_DESCRIPTION("Broadcom BCM43xx wireless driver"); @@ -342,234 +343,6 @@ void bcm43xx_tsf_write(struct bcm43xx_private *bcm, u64 tsf) bcm43xx_write32(bcm, BCM43xx_MMIO_STATUS_BITFIELD, status); } -static u8 bcm43xx_plcp_get_bitrate(struct bcm43xx_plcp_hdr4 *plcp, - const int ofdm_modulation) -{ - u8 rate; - - if (ofdm_modulation) { - switch (plcp->raw[0] & 0xF) { - case 0xB: - rate = IEEE80211_OFDM_RATE_6MB; - break; - case 0xF: - rate = IEEE80211_OFDM_RATE_9MB; - break; - case 0xA: - rate = IEEE80211_OFDM_RATE_12MB; - break; - case 0xE: - rate = IEEE80211_OFDM_RATE_18MB; - break; - case 0x9: - rate = IEEE80211_OFDM_RATE_24MB; - break; - case 0xD: - rate = IEEE80211_OFDM_RATE_36MB; - break; - case 0x8: - rate = IEEE80211_OFDM_RATE_48MB; - break; - case 0xC: - rate = IEEE80211_OFDM_RATE_54MB; - break; - default: - rate = 0; - assert(0); - } - } else { - switch (plcp->raw[0]) { - case 0x0A: - rate = IEEE80211_CCK_RATE_1MB; - break; - case 0x14: - rate = IEEE80211_CCK_RATE_2MB; - break; - case 0x37: - rate = IEEE80211_CCK_RATE_5MB; - break; - case 0x6E: - rate = IEEE80211_CCK_RATE_11MB; - break; - default: - rate = 0; - assert(0); - } - } - - return rate; -} - -static u8 bcm43xx_plcp_get_ratecode_cck(const u8 bitrate) -{ - switch (bitrate) { - case IEEE80211_CCK_RATE_1MB: - return 0x0A; - case IEEE80211_CCK_RATE_2MB: - return 0x14; - case IEEE80211_CCK_RATE_5MB: - return 0x37; - case IEEE80211_CCK_RATE_11MB: - return 0x6E; - } - assert(0); - return 0; -} - -static u8 bcm43xx_plcp_get_ratecode_ofdm(const u8 bitrate) -{ - switch (bitrate) { - case IEEE80211_OFDM_RATE_6MB: - return 0xB; - case IEEE80211_OFDM_RATE_9MB: - return 0xF; - case IEEE80211_OFDM_RATE_12MB: - return 0xA; - case IEEE80211_OFDM_RATE_18MB: - return 0xE; - case IEEE80211_OFDM_RATE_24MB: - return 0x9; - case IEEE80211_OFDM_RATE_36MB: - return 0xD; - case IEEE80211_OFDM_RATE_48MB: - return 0x8; - case IEEE80211_OFDM_RATE_54MB: - return 0xC; - } - assert(0); - return 0; -} - -static void bcm43xx_generate_plcp_hdr(struct bcm43xx_plcp_hdr4 *plcp, - u16 octets, const u8 bitrate, - const int ofdm_modulation) -{ - __le32 *data = &(plcp->data); - __u8 *raw = plcp->raw; - - /* Account for hardware-appended FCS. */ - octets += IEEE80211_FCS_LEN; - - if (ofdm_modulation) { - *data = bcm43xx_plcp_get_ratecode_ofdm(bitrate); - assert(!(octets & 0xF000)); - *data |= (octets << 5); - *data = cpu_to_le32(*data); - } else { - u32 plen; - - plen = octets * 16 / bitrate; - if ((octets * 16 % bitrate) > 0) { - plen++; - if ((bitrate == IEEE80211_CCK_RATE_11MB) - && ((octets * 8 % 11) < 4)) { - raw[1] = 0x84; - } else - raw[1] = 0x04; - } else - raw[1] = 0x04; - *data |= cpu_to_le32(plen << 16); - raw[0] = bcm43xx_plcp_get_ratecode_cck(bitrate); - } - -//bcm43xx_printk_bitdump(raw, 4, 0, "PLCP"); -} - -void bcm43xx_generate_txhdr(struct bcm43xx_private *bcm, - struct bcm43xx_txhdr *txhdr, - const unsigned char *fragment_data, - unsigned int fragment_len, - const int is_first_fragment, - const u16 cookie) -{ - const struct bcm43xx_phyinfo *phy = bcm->current_core->phy; - const struct ieee80211_hdr_1addr *wireless_header = (const struct ieee80211_hdr_1addr *)fragment_data; - const struct ieee80211_security *secinfo = &bcm->ieee->sec; - u8 bitrate; - int ofdm_modulation; - u8 fallback_bitrate; - int fallback_ofdm_modulation; - u16 tmp; - u16 encrypt_frame; - - /* Now construct the TX header. */ - memset(txhdr, 0, sizeof(*txhdr)); - - //TODO: Some RTS/CTS stuff has to be done. - //TODO: Encryption stuff. - //TODO: others? - - bitrate = bcm->softmac->txrates.default_rate; - ofdm_modulation = !(ieee80211_is_cck_rate(bitrate)); - fallback_bitrate = bcm->softmac->txrates.default_fallback; - fallback_ofdm_modulation = !(ieee80211_is_cck_rate(fallback_bitrate)); - - /* Set Frame Control from 80211 header. */ - txhdr->frame_control = wireless_header->frame_ctl; - /* Copy address1 from 80211 header. */ - memcpy(txhdr->mac1, wireless_header->addr1, 6); - /* Set the fallback duration ID. */ - //FIXME: We use the original durid for now. - txhdr->fallback_dur_id = wireless_header->duration_id; - - /* Set the cookie (used as driver internal ID for the frame) */ - txhdr->cookie = cpu_to_le16(cookie); - - encrypt_frame = le16_to_cpup(&wireless_header->frame_ctl) & IEEE80211_FCTL_PROTECTED; - if (encrypt_frame && !bcm->ieee->host_encrypt) { - const struct ieee80211_hdr_3addr *hdr = (struct ieee80211_hdr_3addr *)wireless_header; - if (fragment_len <= sizeof(struct ieee80211_hdr_3addr)+4) { - dprintkl(KERN_ERR PFX "invalid packet with PROTECTED" - "flag set discarded"); - return; - } - memcpy(txhdr->wep_iv, hdr->payload, 4); - /* Hardware appends ICV. */ - fragment_len += 4; - } - - /* Generate the PLCP header and the fallback PLCP header. */ - bcm43xx_generate_plcp_hdr((struct bcm43xx_plcp_hdr4 *)(&txhdr->plcp), - fragment_len, - bitrate, ofdm_modulation); - bcm43xx_generate_plcp_hdr(&txhdr->fallback_plcp, fragment_len, - fallback_bitrate, fallback_ofdm_modulation); - - /* Set the CONTROL field */ - tmp = 0; - if (ofdm_modulation) - tmp |= BCM43xx_TXHDRCTL_OFDM; - if (bcm->short_preamble) //FIXME: could be the other way around, please test - tmp |= BCM43xx_TXHDRCTL_SHORT_PREAMBLE; - tmp |= (phy->antenna_diversity << BCM43xx_TXHDRCTL_ANTENNADIV_SHIFT) - & BCM43xx_TXHDRCTL_ANTENNADIV_MASK; - txhdr->control = cpu_to_le16(tmp); - - /* Set the FLAGS field */ - tmp = 0; - if (!is_multicast_ether_addr(wireless_header->addr1) && - !is_broadcast_ether_addr(wireless_header->addr1)) - tmp |= BCM43xx_TXHDRFLAG_EXPECTACK; - if (1 /* FIXME: PS poll?? */) - tmp |= 0x10; // FIXME: unknown meaning. - if (fallback_ofdm_modulation) - tmp |= BCM43xx_TXHDRFLAG_FALLBACKOFDM; - if (is_first_fragment) - tmp |= BCM43xx_TXHDRFLAG_FIRSTFRAGMENT; - txhdr->flags = cpu_to_le16(tmp); - - /* Set WSEC/RATE field */ - if (encrypt_frame && !bcm->ieee->host_encrypt) { - tmp = (bcm->key[secinfo->active_key].algorithm << BCM43xx_TXHDR_WSEC_ALGO_SHIFT) - & BCM43xx_TXHDR_WSEC_ALGO_MASK; - tmp |= (secinfo->active_key << BCM43xx_TXHDR_WSEC_KEYINDEX_SHIFT) - & BCM43xx_TXHDR_WSEC_KEYINDEX_MASK; - txhdr->wsec_rate = cpu_to_le16(tmp); - } - -//bcm43xx_printk_bitdump((const unsigned char *)txhdr, sizeof(*txhdr), 1, "TX header"); -} - static void bcm43xx_macfilter_set(struct bcm43xx_private *bcm, u16 offset, @@ -3773,207 +3546,6 @@ err_pci_disable: goto out; } -static s8 bcm43xx_rssi_postprocess(struct bcm43xx_private *bcm, - u8 in_rssi, int ofdm, - int adjust_2053, int adjust_2050) -{ - s32 tmp; - - switch (bcm->current_core->radio->version) { - case 0x2050: - if (ofdm) { - tmp = in_rssi; - if (tmp > 127) - tmp -= 256; - tmp *= 73; - tmp /= 64; - if (adjust_2050) - tmp += 25; - else - tmp -= 3; - } else { - if (bcm->sprom.boardflags & BCM43xx_BFL_RSSI) { - if (in_rssi > 63) - in_rssi = 63; - tmp = bcm->current_core->radio->nrssi_lt[in_rssi]; - tmp = 31 - tmp; - tmp *= -131; - tmp /= 128; - tmp -= 57; - } else { - tmp = in_rssi; - tmp = 31 - tmp; - tmp *= -149; - tmp /= 128; - tmp -= 68; - } - if (bcm->current_core->phy->type == BCM43xx_PHYTYPE_G && - adjust_2050) - tmp += 25; - } - break; - case 0x2060: - if (in_rssi > 127) - tmp = in_rssi - 256; - else - tmp = in_rssi; - break; - default: - tmp = in_rssi; - tmp -= 11; - tmp *= 103; - tmp /= 64; - if (adjust_2053) - tmp -= 109; - else - tmp -= 83; - } - - return (s8)tmp; -} - -static s8 bcm43xx_rssinoise_postprocess(struct bcm43xx_private *bcm, - u8 in_rssi) -{ - s8 ret; - - if (bcm->current_core->phy->type == BCM43xx_PHYTYPE_A) { - //TODO: Incomplete specs. - ret = 0; - } else - ret = bcm43xx_rssi_postprocess(bcm, in_rssi, 0, 1, 1); - - return ret; -} - -static inline -int bcm43xx_rx_packet(struct bcm43xx_private *bcm, - struct sk_buff *skb, - struct ieee80211_rx_stats *stats) -{ - int err; - - err = ieee80211_rx(bcm->ieee, skb, stats); - if (unlikely(err == 0)) - return -EINVAL; - return 0; -} - -int bcm43xx_rx(struct bcm43xx_private *bcm, - struct sk_buff *skb, - struct bcm43xx_rxhdr *rxhdr) -{ - struct bcm43xx_plcp_hdr4 *plcp; - struct ieee80211_rx_stats stats; - struct ieee80211_hdr_4addr *wlhdr; - u16 frame_ctl; - int is_packet_for_us = 0; - int err = -EINVAL; - const u16 rxflags1 = le16_to_cpu(rxhdr->flags1); - const u16 rxflags2 = le16_to_cpu(rxhdr->flags2); - const u16 rxflags3 = le16_to_cpu(rxhdr->flags3); - const int is_ofdm = !!(rxflags1 & BCM43xx_RXHDR_FLAGS1_OFDM); - - if (rxflags2 & BCM43xx_RXHDR_FLAGS2_TYPE2FRAME) { - plcp = (struct bcm43xx_plcp_hdr4 *)(skb->data + 2); - /* Skip two unknown bytes and the PLCP header. */ - skb_pull(skb, 2 + sizeof(struct bcm43xx_plcp_hdr6)); - } else { - plcp = (struct bcm43xx_plcp_hdr4 *)(skb->data); - /* Skip the PLCP header. */ - skb_pull(skb, sizeof(struct bcm43xx_plcp_hdr6)); - } - /* The SKB contains the PAYLOAD (wireless header + data) - * at this point. The FCS at the end is stripped. - */ - - memset(&stats, 0, sizeof(stats)); - stats.mac_time = le16_to_cpu(rxhdr->mactime); - stats.rssi = bcm43xx_rssi_postprocess(bcm, rxhdr->rssi, is_ofdm, - !!(rxflags1 & BCM43xx_RXHDR_FLAGS1_2053RSSIADJ), - !!(rxflags3 & BCM43xx_RXHDR_FLAGS3_2050RSSIADJ)); - stats.signal = rxhdr->signal_quality; //FIXME -//TODO stats.noise = - stats.rate = bcm43xx_plcp_get_bitrate(plcp, is_ofdm); -//printk("RX ofdm %d, rate == %u\n", is_ofdm, stats.rate); - stats.received_channel = bcm->current_core->radio->channel; -//TODO stats.control = - stats.mask = IEEE80211_STATMASK_SIGNAL | -//TODO IEEE80211_STATMASK_NOISE | - IEEE80211_STATMASK_RATE | - IEEE80211_STATMASK_RSSI; - if (bcm->current_core->phy->type == BCM43xx_PHYTYPE_A) - stats.freq = IEEE80211_52GHZ_BAND; - else - stats.freq = IEEE80211_24GHZ_BAND; - stats.len = skb->len; - - bcm->stats.last_rx = jiffies; - if (bcm->ieee->iw_mode == IW_MODE_MONITOR) - return bcm43xx_rx_packet(bcm, skb, &stats); - - wlhdr = (struct ieee80211_hdr_4addr *)(skb->data); - - switch (bcm->ieee->iw_mode) { - case IW_MODE_ADHOC: - if (memcmp(wlhdr->addr1, bcm->net_dev->dev_addr, ETH_ALEN) == 0 || - memcmp(wlhdr->addr3, bcm->ieee->bssid, ETH_ALEN) == 0 || - is_broadcast_ether_addr(wlhdr->addr1) || - is_multicast_ether_addr(wlhdr->addr1) || - bcm->net_dev->flags & IFF_PROMISC) - is_packet_for_us = 1; - break; - case IW_MODE_INFRA: - default: - /* When receiving multicast or broadcast packets, filter out - the packets we send ourself; we shouldn't see those */ - if (memcmp(wlhdr->addr3, bcm->ieee->bssid, ETH_ALEN) == 0 || - memcmp(wlhdr->addr1, bcm->net_dev->dev_addr, ETH_ALEN) == 0 || - (memcmp(wlhdr->addr3, bcm->net_dev->dev_addr, ETH_ALEN) && - (is_broadcast_ether_addr(wlhdr->addr1) || - is_multicast_ether_addr(wlhdr->addr1) || - bcm->net_dev->flags & IFF_PROMISC))) - is_packet_for_us = 1; - break; - } - - frame_ctl = le16_to_cpu(wlhdr->frame_ctl); - if ((frame_ctl & IEEE80211_FCTL_PROTECTED) && !bcm->ieee->host_decrypt) { - frame_ctl &= ~IEEE80211_FCTL_PROTECTED; - wlhdr->frame_ctl = cpu_to_le16(frame_ctl); - /* trim IV and ICV */ - /* FIXME: this must be done only for WEP encrypted packets */ - if (skb->len < 32) { - dprintkl(KERN_ERR PFX "RX packet dropped (PROTECTED flag " - "set and length < 32)\n"); - return -EINVAL; - } else { - memmove(skb->data + 4, skb->data, 24); - skb_pull(skb, 4); - skb_trim(skb, skb->len - 4); - stats.len -= 8; - } - wlhdr = (struct ieee80211_hdr_4addr *)(skb->data); - } - - switch (WLAN_FC_GET_TYPE(frame_ctl)) { - case IEEE80211_FTYPE_MGMT: - ieee80211_rx_mgt(bcm->ieee, wlhdr, &stats); - break; - case IEEE80211_FTYPE_DATA: - if (is_packet_for_us) - err = bcm43xx_rx_packet(bcm, skb, &stats); - break; - case IEEE80211_FTYPE_CTL: - break; - default: - assert(0); - return -EINVAL; - } - - return err; -} - /* Do the Hardware IO operations to send the txb */ static inline int bcm43xx_tx(struct bcm43xx_private *bcm, struct ieee80211_txb *txb) diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_main.h b/drivers/net/wireless/bcm43xx/bcm43xx_main.h index d460393ed3..086136c3d0 100644 --- a/drivers/net/wireless/bcm43xx/bcm43xx_main.h +++ b/drivers/net/wireless/bcm43xx/bcm43xx_main.h @@ -52,134 +52,12 @@ static inline void e_aton(char *str, char *dest) } #endif - -#define _bcm43xx_declare_plcp_hdr(size) \ - struct bcm43xx_plcp_hdr##size { \ - union { \ - __le32 data; \ - __u8 raw[size]; \ - } __attribute__((__packed__)); \ - } __attribute__((__packed__)) - -/* struct bcm43xx_plcp_hdr4 */ -_bcm43xx_declare_plcp_hdr(4); -/* struct bcm430c_plcp_hdr6 */ -_bcm43xx_declare_plcp_hdr(6); - -#undef _bcm43xx_declare_plcp_hdr - - #define P4D_BYT3S(magic, nr_bytes) u8 __p4dding##magic[nr_bytes] #define P4D_BYTES(line, nr_bytes) P4D_BYT3S(line, nr_bytes) /* Magic helper macro to pad structures. Ignore those above. It's magic. */ #define PAD_BYTES(nr_bytes) P4D_BYTES( __LINE__ , (nr_bytes)) -/* Device specific TX header. To be prepended to TX frames. */ -struct bcm43xx_txhdr { - union { - struct { - u16 flags; - u16 wsec_rate; - u16 frame_control; - u16 unknown_zeroed_0; - u16 control; - unsigned char wep_iv[10]; - unsigned char unknown_wsec_tkip_data[3]; //FIXME - PAD_BYTES(3); - unsigned char mac1[6]; - u16 unknown_zeroed_1; - struct bcm43xx_plcp_hdr4 rts_cts_fallback_plcp; - u16 rts_cts_dur_fallback; - struct bcm43xx_plcp_hdr4 fallback_plcp; - u16 fallback_dur_id; - PAD_BYTES(2); - u16 cookie; - u16 unknown_scb_stuff; //FIXME - struct bcm43xx_plcp_hdr6 rts_cts_plcp; - u16 rts_cts_frame_type; - u16 rts_cts_dur; - unsigned char rts_cts_mac1[6]; - unsigned char rts_cts_mac2[6]; - PAD_BYTES(2); - struct bcm43xx_plcp_hdr6 plcp; - } __attribute__((__packed__)); - - unsigned char raw[82]; - } __attribute__((__packed__)); -} __attribute__((__packed__)); - -struct sk_buff; - -void bcm43xx_generate_txhdr(struct bcm43xx_private *bcm, - struct bcm43xx_txhdr *txhdr, - const unsigned char *fragment_data, - const unsigned int fragment_len, - const int is_first_fragment, - const u16 cookie); - -/* RX header as received from the hardware. */ -struct bcm43xx_rxhdr { - /* Frame Length. Must be generated explicitely in PIO mode. */ - __le16 frame_length; - PAD_BYTES(2); - /* Flags field 1 */ - __le16 flags1; - u8 rssi; - u8 signal_quality; - PAD_BYTES(2); - /* Flags field 3 */ - __le16 flags3; - /* Flags field 2 */ - __le16 flags2; - /* Lower 16bits of the TSF at the time the frame started. */ - __le16 mactime; - PAD_BYTES(14); -} __attribute__((__packed__)); - -#define BCM43xx_RXHDR_FLAGS1_OFDM (1 << 0) -/*#define BCM43xx_RXHDR_FLAGS1_SIGNAL??? (1 << 3) FIXME */ -#define BCM43xx_RXHDR_FLAGS1_SHORTPREAMBLE (1 << 7) -#define BCM43xx_RXHDR_FLAGS1_2053RSSIADJ (1 << 14) - -#define BCM43xx_RXHDR_FLAGS2_INVALIDFRAME (1 << 0) -#define BCM43xx_RXHDR_FLAGS2_TYPE2FRAME (1 << 2) -/*FIXME: WEP related flags */ - -#define BCM43xx_RXHDR_FLAGS3_2050RSSIADJ (1 << 10) - -/* Transmit Status as received from the hardware. */ -struct bcm43xx_hwxmitstatus { - PAD_BYTES(4); - __le16 cookie; - u8 flags; - u8 cnt1:4, - cnt2:4; - PAD_BYTES(2); - __le16 seq; - __le16 unknown; //FIXME -} __attribute__((__packed__)); - -/* Transmit Status in CPU byteorder. */ -struct bcm43xx_xmitstatus { - u16 cookie; - u8 flags; - u8 cnt1:4, - cnt2:4; - u16 seq; - u16 unknown; //FIXME -}; - -#define BCM43xx_TXSTAT_FLAG_ACK 0x01 -//TODO #define BCM43xx_TXSTAT_FLAG_??? 0x02 -//TODO #define BCM43xx_TXSTAT_FLAG_??? 0x04 -//TODO #define BCM43xx_TXSTAT_FLAG_??? 0x08 -//TODO #define BCM43xx_TXSTAT_FLAG_??? 0x10 -#define BCM43xx_TXSTAT_FLAG_IGNORE 0x20 -//TODO #define BCM43xx_TXSTAT_FLAG_??? 0x40 -//TODO #define BCM43xx_TXSTAT_FLAG_??? 0x80 - - /* Lightweight function to convert a frequency (in Mhz) to a channel number. */ static inline u8 bcm43xx_freq_to_channel_a(int freq) @@ -259,10 +137,6 @@ int bcm43xx_is_valid_channel(struct bcm43xx_private *bcm, void bcm43xx_tsf_read(struct bcm43xx_private *bcm, u64 *tsf); void bcm43xx_tsf_write(struct bcm43xx_private *bcm, u64 tsf); -int bcm43xx_rx(struct bcm43xx_private *bcm, - struct sk_buff *skb, - struct bcm43xx_rxhdr *rxhdr); - void bcm43xx_set_iwmode(struct bcm43xx_private *bcm, int iw_mode); @@ -283,11 +157,6 @@ int bcm43xx_switch_core(struct bcm43xx_private *bcm, struct bcm43xx_coreinfo *ne void bcm43xx_wireless_core_reset(struct bcm43xx_private *bcm, int connect_phy); -int bcm43xx_pci_read_config_16(struct pci_dev *pdev, u16 offset, u16 *val); -int bcm43xx_pci_read_config_32(struct pci_dev *pdev, u16 offset, u32 *val); -int bcm43xx_pci_write_config_16(struct pci_dev *pdev, int offset, u16 val); -int bcm43xx_pci_write_config_32(struct pci_dev *pdev, int offset, u32 val); - void bcm43xx_mac_suspend(struct bcm43xx_private *bcm); void bcm43xx_mac_enable(struct bcm43xx_private *bcm); diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_pio.c b/drivers/net/wireless/bcm43xx/bcm43xx_pio.c index 0bf4b3e26f..7b45fa1314 100644 --- a/drivers/net/wireless/bcm43xx/bcm43xx_pio.c +++ b/drivers/net/wireless/bcm43xx/bcm43xx_pio.c @@ -26,6 +26,7 @@ #include "bcm43xx.h" #include "bcm43xx_pio.h" #include "bcm43xx_main.h" +#include "bcm43xx_xmit.h" #include diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_xmit.c b/drivers/net/wireless/bcm43xx/bcm43xx_xmit.c new file mode 100644 index 0000000000..5ee572e79f --- /dev/null +++ b/drivers/net/wireless/bcm43xx/bcm43xx_xmit.c @@ -0,0 +1,579 @@ +/* + + Broadcom BCM43xx wireless driver + + Transmission (TX/RX) related functions. + + Copyright (c) 2005 Martin Langer , + Stefano Brivio + Michael Buesch + Danny van Dyk + Andreas Jaggi + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; see the file COPYING. If not, write to + the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor, + Boston, MA 02110-1301, USA. + +*/ + +#include "bcm43xx_xmit.h" + +#include + + +/* Extract the bitrate out of a CCK PLCP header. */ +static u8 bcm43xx_plcp_get_bitrate_cck(struct bcm43xx_plcp_hdr4 *plcp) +{ + switch (plcp->raw[0]) { + case 0x0A: + return IEEE80211_CCK_RATE_1MB; + case 0x14: + return IEEE80211_CCK_RATE_2MB; + case 0x37: + return IEEE80211_CCK_RATE_5MB; + case 0x6E: + return IEEE80211_CCK_RATE_11MB; + } + assert(0); + return 0; +} + +/* Extract the bitrate out of an OFDM PLCP header. */ +static u8 bcm43xx_plcp_get_bitrate_ofdm(struct bcm43xx_plcp_hdr4 *plcp) +{ + switch (plcp->raw[0] & 0xF) { + case 0xB: + return IEEE80211_OFDM_RATE_6MB; + case 0xF: + return IEEE80211_OFDM_RATE_9MB; + case 0xA: + return IEEE80211_OFDM_RATE_12MB; + case 0xE: + return IEEE80211_OFDM_RATE_18MB; + case 0x9: + return IEEE80211_OFDM_RATE_24MB; + case 0xD: + return IEEE80211_OFDM_RATE_36MB; + case 0x8: + return IEEE80211_OFDM_RATE_48MB; + case 0xC: + return IEEE80211_OFDM_RATE_54MB; + } + assert(0); + return 0; +} + +u8 bcm43xx_plcp_get_ratecode_cck(const u8 bitrate) +{ + switch (bitrate) { + case IEEE80211_CCK_RATE_1MB: + return 0x0A; + case IEEE80211_CCK_RATE_2MB: + return 0x14; + case IEEE80211_CCK_RATE_5MB: + return 0x37; + case IEEE80211_CCK_RATE_11MB: + return 0x6E; + } + assert(0); + return 0; +} + +u8 bcm43xx_plcp_get_ratecode_ofdm(const u8 bitrate) +{ + switch (bitrate) { + case IEEE80211_OFDM_RATE_6MB: + return 0xB; + case IEEE80211_OFDM_RATE_9MB: + return 0xF; + case IEEE80211_OFDM_RATE_12MB: + return 0xA; + case IEEE80211_OFDM_RATE_18MB: + return 0xE; + case IEEE80211_OFDM_RATE_24MB: + return 0x9; + case IEEE80211_OFDM_RATE_36MB: + return 0xD; + case IEEE80211_OFDM_RATE_48MB: + return 0x8; + case IEEE80211_OFDM_RATE_54MB: + return 0xC; + } + assert(0); + return 0; +} + +static void bcm43xx_generate_plcp_hdr(struct bcm43xx_plcp_hdr4 *plcp, + const u16 octets, const u8 bitrate, + const int ofdm_modulation) +{ + __le32 *data = &(plcp->data); + __u8 *raw = plcp->raw; + + if (ofdm_modulation) { + *data = bcm43xx_plcp_get_ratecode_ofdm(bitrate); + assert(!(octets & 0xF000)); + *data |= (octets << 5); + *data = cpu_to_le32(*data); + } else { + u32 plen; + + plen = octets * 16 / bitrate; + if ((octets * 16 % bitrate) > 0) { + plen++; + if ((bitrate == IEEE80211_CCK_RATE_11MB) + && ((octets * 8 % 11) < 4)) { + raw[1] = 0x84; + } else + raw[1] = 0x04; + } else + raw[1] = 0x04; + *data |= cpu_to_le32(plen << 16); + raw[0] = bcm43xx_plcp_get_ratecode_cck(bitrate); + } +} + +static u8 bcm43xx_calc_fallback_rate(u8 bitrate) +{ + switch (bitrate) { + case IEEE80211_CCK_RATE_1MB: + return IEEE80211_CCK_RATE_1MB; + case IEEE80211_CCK_RATE_2MB: + return IEEE80211_CCK_RATE_1MB; + case IEEE80211_CCK_RATE_5MB: + return IEEE80211_CCK_RATE_2MB; + case IEEE80211_CCK_RATE_11MB: + return IEEE80211_CCK_RATE_5MB; + case IEEE80211_OFDM_RATE_6MB: + return IEEE80211_CCK_RATE_5MB; + case IEEE80211_OFDM_RATE_9MB: + return IEEE80211_OFDM_RATE_6MB; + case IEEE80211_OFDM_RATE_12MB: + return IEEE80211_OFDM_RATE_9MB; + case IEEE80211_OFDM_RATE_18MB: + return IEEE80211_OFDM_RATE_12MB; + case IEEE80211_OFDM_RATE_24MB: + return IEEE80211_OFDM_RATE_18MB; + case IEEE80211_OFDM_RATE_36MB: + return IEEE80211_OFDM_RATE_24MB; + case IEEE80211_OFDM_RATE_48MB: + return IEEE80211_OFDM_RATE_36MB; + case IEEE80211_OFDM_RATE_54MB: + return IEEE80211_OFDM_RATE_48MB; + } + assert(0); + return 0; +} + +static +__le16 bcm43xx_calc_duration_id(const struct ieee80211_hdr *wireless_header, + u8 bitrate) +{ + const u16 frame_ctl = le16_to_cpu(wireless_header->frame_ctl); + __le16 duration_id = wireless_header->duration_id; + + switch (WLAN_FC_GET_TYPE(frame_ctl)) { + case IEEE80211_FTYPE_DATA: + case IEEE80211_FTYPE_MGMT: + //TODO: Steal the code from ieee80211, once it is completed there. + break; + case IEEE80211_FTYPE_CTL: + /* Use the original duration/id. */ + break; + default: + assert(0); + } + + return duration_id; +} + +static inline +u16 ceiling_div(u16 dividend, u16 divisor) +{ + return ((dividend + divisor - 1) / divisor); +} + +static void bcm43xx_generate_rts(const struct bcm43xx_phyinfo *phy, + struct bcm43xx_txhdr *txhdr, + u16 *flags, + u8 bitrate, + const struct ieee80211_hdr_4addr *wlhdr) +{ + u16 fctl; + u16 dur; + u8 fallback_bitrate; + int ofdm_modulation; + int fallback_ofdm_modulation; + u8 *sa, *da; + u16 flen; + +//FIXME sa = ieee80211_get_SA((struct ieee80211_hdr *)wlhdr); +//FIXME da = ieee80211_get_DA((struct ieee80211_hdr *)wlhdr); + fallback_bitrate = bcm43xx_calc_fallback_rate(bitrate); + ofdm_modulation = !(ieee80211_is_cck_rate(bitrate)); + fallback_ofdm_modulation = !(ieee80211_is_cck_rate(fallback_bitrate)); + + flen = sizeof(u16) + sizeof(u16) + ETH_ALEN + ETH_ALEN + IEEE80211_FCS_LEN, + bcm43xx_generate_plcp_hdr((struct bcm43xx_plcp_hdr4 *)(&txhdr->rts_cts_plcp), + flen, bitrate, + !ieee80211_is_cck_rate(bitrate)); + bcm43xx_generate_plcp_hdr((struct bcm43xx_plcp_hdr4 *)(&txhdr->rts_cts_fallback_plcp), + flen, fallback_bitrate, + !ieee80211_is_cck_rate(fallback_bitrate)); + fctl = IEEE80211_FTYPE_CTL; + fctl |= IEEE80211_STYPE_RTS; + dur = le16_to_cpu(wlhdr->duration_id); +/*FIXME: should we test for dur==0 here and let it unmodified in this case? + * The following assert checks for this case... + */ +assert(dur); +/*FIXME: The duration calculation is not really correct. + * I am not 100% sure which bitrate to use. We use the RTS rate here, + * but this is likely to be wrong. + */ + if (phy->type == BCM43xx_PHYTYPE_A) { + /* Three times SIFS */ + dur += 16 * 3; + /* Add ACK duration. */ + dur += ceiling_div((16 + 8 * (14 /*bytes*/) + 6) * 10, + bitrate * 4); + /* Add CTS duration. */ + dur += ceiling_div((16 + 8 * (14 /*bytes*/) + 6) * 10, + bitrate * 4); + } else { + /* Three times SIFS */ + dur += 10 * 3; + /* Add ACK duration. */ + dur += ceiling_div(8 * (14 /*bytes*/) * 10, + bitrate); + /* Add CTS duration. */ + dur += ceiling_div(8 * (14 /*bytes*/) * 10, + bitrate); + } + + txhdr->rts_cts_frame_control = cpu_to_le16(fctl); + txhdr->rts_cts_dur = cpu_to_le16(dur); +//printk(BCM43xx_MACFMT " " BCM43xx_MACFMT " " BCM43xx_MACFMT "\n", BCM43xx_MACARG(wlhdr->addr1), BCM43xx_MACARG(wlhdr->addr2), BCM43xx_MACARG(wlhdr->addr3)); +//printk(BCM43xx_MACFMT " " BCM43xx_MACFMT "\n", BCM43xx_MACARG(sa), BCM43xx_MACARG(da)); + memcpy(txhdr->rts_cts_mac1, wlhdr->addr1, ETH_ALEN);//FIXME! + memcpy(txhdr->rts_cts_mac2, sa, ETH_ALEN); + + *flags |= BCM43xx_TXHDRFLAG_RTSCTS; + *flags |= BCM43xx_TXHDRFLAG_RTS; + if (ofdm_modulation) + *flags |= BCM43xx_TXHDRFLAG_RTSCTS_OFDM; + if (fallback_ofdm_modulation) + *flags |= BCM43xx_TXHDRFLAG_RTSCTSFALLBACK_OFDM; +} + +void bcm43xx_generate_txhdr(struct bcm43xx_private *bcm, + struct bcm43xx_txhdr *txhdr, + const unsigned char *fragment_data, + const unsigned int fragment_len, + const int is_first_fragment, + const u16 cookie) +{ + const struct bcm43xx_phyinfo *phy = bcm->current_core->phy; + const struct ieee80211_hdr_4addr *wireless_header = (const struct ieee80211_hdr_4addr *)fragment_data; + const struct ieee80211_security *secinfo = &bcm->ieee->sec; + u8 bitrate; + u8 fallback_bitrate; + int ofdm_modulation; + int fallback_ofdm_modulation; + u16 plcp_fragment_len = fragment_len; + u16 flags = 0; + u16 control = 0; + u16 wsec_rate = 0; + u16 encrypt_frame; + + /* Now construct the TX header. */ + memset(txhdr, 0, sizeof(*txhdr)); + + bitrate = bcm->softmac->txrates.default_rate; + ofdm_modulation = !(ieee80211_is_cck_rate(bitrate)); + fallback_bitrate = bcm43xx_calc_fallback_rate(bitrate); + fallback_ofdm_modulation = !(ieee80211_is_cck_rate(fallback_bitrate)); + + /* Set Frame Control from 80211 header. */ + txhdr->frame_control = wireless_header->frame_ctl; + /* Copy address1 from 80211 header. */ + memcpy(txhdr->mac1, wireless_header->addr1, 6); + /* Set the fallback duration ID. */ + txhdr->fallback_dur_id = bcm43xx_calc_duration_id((const struct ieee80211_hdr *)wireless_header, + fallback_bitrate); + /* Set the cookie (used as driver internal ID for the frame) */ + txhdr->cookie = cpu_to_le16(cookie); + + /* Hardware appends FCS. */ + plcp_fragment_len += IEEE80211_FCS_LEN; + + /* Hardware encryption. */ + encrypt_frame = le16_to_cpup(&wireless_header->frame_ctl) & IEEE80211_FCTL_PROTECTED; + if (encrypt_frame && !bcm->ieee->host_encrypt) { + const struct ieee80211_hdr_3addr *hdr = (struct ieee80211_hdr_3addr *)wireless_header; + memcpy(txhdr->wep_iv, hdr->payload, 4); + /* Hardware appends ICV. */ + plcp_fragment_len += 4; + + wsec_rate |= (bcm->key[secinfo->active_key].algorithm << BCM43xx_TXHDR_WSEC_ALGO_SHIFT) + & BCM43xx_TXHDR_WSEC_ALGO_MASK; + wsec_rate |= (secinfo->active_key << BCM43xx_TXHDR_WSEC_KEYINDEX_SHIFT) + & BCM43xx_TXHDR_WSEC_KEYINDEX_MASK; + } + + /* Generate the PLCP header and the fallback PLCP header. */ + bcm43xx_generate_plcp_hdr((struct bcm43xx_plcp_hdr4 *)(&txhdr->plcp), + plcp_fragment_len, + bitrate, ofdm_modulation); + bcm43xx_generate_plcp_hdr(&txhdr->fallback_plcp, plcp_fragment_len, + fallback_bitrate, fallback_ofdm_modulation); + + /* Set the CONTROL field */ + if (ofdm_modulation) + control |= BCM43xx_TXHDRCTL_OFDM; + if (bcm->short_preamble) //FIXME: could be the other way around, please test + control |= BCM43xx_TXHDRCTL_SHORT_PREAMBLE; + control |= (phy->antenna_diversity << BCM43xx_TXHDRCTL_ANTENNADIV_SHIFT) + & BCM43xx_TXHDRCTL_ANTENNADIV_MASK; + + /* Set the FLAGS field */ + if (!is_multicast_ether_addr(wireless_header->addr1) && + !is_broadcast_ether_addr(wireless_header->addr1)) + flags |= BCM43xx_TXHDRFLAG_EXPECTACK; + if (1 /* FIXME: PS poll?? */) + flags |= 0x10; // FIXME: unknown meaning. + if (fallback_ofdm_modulation) + flags |= BCM43xx_TXHDRFLAG_FALLBACKOFDM; + if (is_first_fragment) + flags |= BCM43xx_TXHDRFLAG_FIRSTFRAGMENT; + + /* Set WSEC/RATE field */ + wsec_rate |= (txhdr->plcp.raw[0] << BCM43xx_TXHDR_RATE_SHIFT) + & BCM43xx_TXHDR_RATE_MASK; + + /* Generate the RTS/CTS packet, if required. */ + /* FIXME: We should first try with CTS-to-self, + * if we are on 80211g. If we get too many + * failures (hidden nodes), we should switch back to RTS/CTS. + */ + if (0/*FIXME txctl->use_rts_cts*/) { + bcm43xx_generate_rts(phy, txhdr, &flags, + 0/*FIXME txctl->rts_cts_rate*/, + wireless_header); + } + + txhdr->flags = cpu_to_le16(flags); + txhdr->control = cpu_to_le16(control); + txhdr->wsec_rate = cpu_to_le16(wsec_rate); +} + +static s8 bcm43xx_rssi_postprocess(struct bcm43xx_private *bcm, + u8 in_rssi, int ofdm, + int adjust_2053, int adjust_2050) +{ + struct bcm43xx_radioinfo *radio = bcm->current_core->radio; + struct bcm43xx_phyinfo *phy = bcm->current_core->phy; + s32 tmp; + + switch (radio->version) { + case 0x2050: + if (ofdm) { + tmp = in_rssi; + if (tmp > 127) + tmp -= 256; + tmp *= 73; + tmp /= 64; + if (adjust_2050) + tmp += 25; + else + tmp -= 3; + } else { + if (bcm->sprom.boardflags & BCM43xx_BFL_RSSI) { + if (in_rssi > 63) + in_rssi = 63; + tmp = radio->nrssi_lt[in_rssi]; + tmp = 31 - tmp; + tmp *= -131; + tmp /= 128; + tmp -= 57; + } else { + tmp = in_rssi; + tmp = 31 - tmp; + tmp *= -149; + tmp /= 128; + tmp -= 68; + } + if (phy->type == BCM43xx_PHYTYPE_G && + adjust_2050) + tmp += 25; + } + break; + case 0x2060: + if (in_rssi > 127) + tmp = in_rssi - 256; + else + tmp = in_rssi; + break; + default: + tmp = in_rssi; + tmp -= 11; + tmp *= 103; + tmp /= 64; + if (adjust_2053) + tmp -= 109; + else + tmp -= 83; + } + + return (s8)tmp; +} + +static s8 bcm43xx_rssinoise_postprocess(struct bcm43xx_private *bcm, + u8 in_rssi) +{ + struct bcm43xx_phyinfo *phy = bcm->current_core->phy; + s8 ret; + + if (phy->type == BCM43xx_PHYTYPE_A) { + //TODO: Incomplete specs. + ret = 0; + } else + ret = bcm43xx_rssi_postprocess(bcm, in_rssi, 0, 1, 1); + + return ret; +} + +int bcm43xx_rx(struct bcm43xx_private *bcm, + struct sk_buff *skb, + struct bcm43xx_rxhdr *rxhdr) +{ + struct bcm43xx_plcp_hdr4 *plcp; + struct ieee80211_rx_stats stats; + struct ieee80211_hdr_4addr *wlhdr; + u16 frame_ctl; + int is_packet_for_us = 0; + int err = -EINVAL; + const u16 rxflags1 = le16_to_cpu(rxhdr->flags1); + const u16 rxflags2 = le16_to_cpu(rxhdr->flags2); + const u16 rxflags3 = le16_to_cpu(rxhdr->flags3); + const int is_ofdm = !!(rxflags1 & BCM43xx_RXHDR_FLAGS1_OFDM); + + if (rxflags2 & BCM43xx_RXHDR_FLAGS2_TYPE2FRAME) { + plcp = (struct bcm43xx_plcp_hdr4 *)(skb->data + 2); + /* Skip two unknown bytes and the PLCP header. */ + skb_pull(skb, 2 + sizeof(struct bcm43xx_plcp_hdr6)); + } else { + plcp = (struct bcm43xx_plcp_hdr4 *)(skb->data); + /* Skip the PLCP header. */ + skb_pull(skb, sizeof(struct bcm43xx_plcp_hdr6)); + } + /* The SKB contains the PAYLOAD (wireless header + data) + * at this point. The FCS at the end is stripped. + */ + + memset(&stats, 0, sizeof(stats)); + stats.mac_time = le16_to_cpu(rxhdr->mactime); + stats.rssi = bcm43xx_rssi_postprocess(bcm, rxhdr->rssi, is_ofdm, + !!(rxflags1 & BCM43xx_RXHDR_FLAGS1_2053RSSIADJ), + !!(rxflags3 & BCM43xx_RXHDR_FLAGS3_2050RSSIADJ)); + stats.signal = rxhdr->signal_quality; //FIXME +//TODO stats.noise = + if (is_ofdm) + stats.rate = bcm43xx_plcp_get_bitrate_ofdm(plcp); + else + stats.rate = bcm43xx_plcp_get_bitrate_cck(plcp); +//printk("RX ofdm %d, rate == %u\n", is_ofdm, stats.rate); + stats.received_channel = bcm->current_core->radio->channel; +//TODO stats.control = + stats.mask = IEEE80211_STATMASK_SIGNAL | +//TODO IEEE80211_STATMASK_NOISE | + IEEE80211_STATMASK_RATE | + IEEE80211_STATMASK_RSSI; + if (bcm->current_core->phy->type == BCM43xx_PHYTYPE_A) + stats.freq = IEEE80211_52GHZ_BAND; + else + stats.freq = IEEE80211_24GHZ_BAND; + stats.len = skb->len; + + bcm->stats.last_rx = jiffies; + if (bcm->ieee->iw_mode == IW_MODE_MONITOR) { + err = ieee80211_rx(bcm->ieee, skb, &stats); + return (err == 0) ? -EINVAL : 0; + } + + wlhdr = (struct ieee80211_hdr_4addr *)(skb->data); + + switch (bcm->ieee->iw_mode) { + case IW_MODE_ADHOC: + if (memcmp(wlhdr->addr1, bcm->net_dev->dev_addr, ETH_ALEN) == 0 || + memcmp(wlhdr->addr3, bcm->ieee->bssid, ETH_ALEN) == 0 || + is_broadcast_ether_addr(wlhdr->addr1) || + is_multicast_ether_addr(wlhdr->addr1) || + bcm->net_dev->flags & IFF_PROMISC) + is_packet_for_us = 1; + break; + case IW_MODE_INFRA: + default: + /* When receiving multicast or broadcast packets, filter out + the packets we send ourself; we shouldn't see those */ + if (memcmp(wlhdr->addr3, bcm->ieee->bssid, ETH_ALEN) == 0 || + memcmp(wlhdr->addr1, bcm->net_dev->dev_addr, ETH_ALEN) == 0 || + (memcmp(wlhdr->addr3, bcm->net_dev->dev_addr, ETH_ALEN) && + (is_broadcast_ether_addr(wlhdr->addr1) || + is_multicast_ether_addr(wlhdr->addr1) || + bcm->net_dev->flags & IFF_PROMISC))) + is_packet_for_us = 1; + break; + } + + frame_ctl = le16_to_cpu(wlhdr->frame_ctl); + if ((frame_ctl & IEEE80211_FCTL_PROTECTED) && !bcm->ieee->host_decrypt) { + frame_ctl &= ~IEEE80211_FCTL_PROTECTED; + wlhdr->frame_ctl = cpu_to_le16(frame_ctl); + /* trim IV and ICV */ + /* FIXME: this must be done only for WEP encrypted packets */ + if (skb->len < 32) { + dprintkl(KERN_ERR PFX "RX packet dropped (PROTECTED flag " + "set and length < 32)\n"); + return -EINVAL; + } else { + memmove(skb->data + 4, skb->data, 24); + skb_pull(skb, 4); + skb_trim(skb, skb->len - 4); + stats.len -= 8; + } + wlhdr = (struct ieee80211_hdr_4addr *)(skb->data); + } + + switch (WLAN_FC_GET_TYPE(frame_ctl)) { + case IEEE80211_FTYPE_MGMT: + ieee80211_rx_mgt(bcm->ieee, wlhdr, &stats); + break; + case IEEE80211_FTYPE_DATA: + if (is_packet_for_us) { + err = ieee80211_rx(bcm->ieee, skb, &stats); + err = (err == 0) ? -EINVAL : 0; + } + break; + case IEEE80211_FTYPE_CTL: + break; + default: + assert(0); + return -EINVAL; + } + + return err; +} + +/* vim: set ts=8 sw=8 sts=8: */ diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_xmit.h b/drivers/net/wireless/bcm43xx/bcm43xx_xmit.h new file mode 100644 index 0000000000..2aed19e35c --- /dev/null +++ b/drivers/net/wireless/bcm43xx/bcm43xx_xmit.h @@ -0,0 +1,156 @@ +#ifndef BCM43xx_XMIT_H_ +#define BCM43xx_XMIT_H_ + +#include "bcm43xx_main.h" + + +#define _bcm43xx_declare_plcp_hdr(size) \ + struct bcm43xx_plcp_hdr##size { \ + union { \ + __le32 data; \ + __u8 raw[size]; \ + } __attribute__((__packed__)); \ + } __attribute__((__packed__)) + +/* struct bcm43xx_plcp_hdr4 */ +_bcm43xx_declare_plcp_hdr(4); +/* struct bcm43xx_plcp_hdr6 */ +_bcm43xx_declare_plcp_hdr(6); + +#undef _bcm43xx_declare_plcp_hdr + +/* Device specific TX header. To be prepended to TX frames. */ +struct bcm43xx_txhdr { + union { + struct { + __le16 flags; + __le16 wsec_rate; + __le16 frame_control; + u16 unknown_zeroed_0; + __le16 control; + u8 wep_iv[10]; + u8 unknown_wsec_tkip_data[3]; //FIXME + PAD_BYTES(3); + u8 mac1[6]; + u16 unknown_zeroed_1; + struct bcm43xx_plcp_hdr4 rts_cts_fallback_plcp; + __le16 rts_cts_dur_fallback; + struct bcm43xx_plcp_hdr4 fallback_plcp; + __le16 fallback_dur_id; + PAD_BYTES(2); + __le16 cookie; + __le16 unknown_scb_stuff; //FIXME + struct bcm43xx_plcp_hdr6 rts_cts_plcp; + __le16 rts_cts_frame_control; + __le16 rts_cts_dur; + u8 rts_cts_mac1[6]; + u8 rts_cts_mac2[6]; + PAD_BYTES(2); + struct bcm43xx_plcp_hdr6 plcp; + } __attribute__((__packed__)); + u8 raw[82]; + } __attribute__((__packed__)); +} __attribute__((__packed__)); + +/* Values/Masks for the device TX header */ +#define BCM43xx_TXHDRFLAG_EXPECTACK 0x0001 +#define BCM43xx_TXHDRFLAG_RTSCTS 0x0002 +#define BCM43xx_TXHDRFLAG_RTS 0x0004 +#define BCM43xx_TXHDRFLAG_FIRSTFRAGMENT 0x0008 +#define BCM43xx_TXHDRFLAG_DESTPSMODE 0x0020 +#define BCM43xx_TXHDRFLAG_RTSCTS_OFDM 0x0080 +#define BCM43xx_TXHDRFLAG_FALLBACKOFDM 0x0100 +#define BCM43xx_TXHDRFLAG_RTSCTSFALLBACK_OFDM 0x0200 +#define BCM43xx_TXHDRFLAG_CTS 0x0400 +#define BCM43xx_TXHDRFLAG_FRAMEBURST 0x0800 + +#define BCM43xx_TXHDRCTL_OFDM 0x0001 +#define BCM43xx_TXHDRCTL_SHORT_PREAMBLE 0x0010 +#define BCM43xx_TXHDRCTL_ANTENNADIV_MASK 0x0030 +#define BCM43xx_TXHDRCTL_ANTENNADIV_SHIFT 8 + +#define BCM43xx_TXHDR_RATE_MASK 0x0F00 +#define BCM43xx_TXHDR_RATE_SHIFT 8 +#define BCM43xx_TXHDR_RTSRATE_MASK 0xF000 +#define BCM43xx_TXHDR_RTSRATE_SHIFT 12 +#define BCM43xx_TXHDR_WSEC_KEYINDEX_MASK 0x00F0 +#define BCM43xx_TXHDR_WSEC_KEYINDEX_SHIFT 4 +#define BCM43xx_TXHDR_WSEC_ALGO_MASK 0x0003 +#define BCM43xx_TXHDR_WSEC_ALGO_SHIFT 0 + +void bcm43xx_generate_txhdr(struct bcm43xx_private *bcm, + struct bcm43xx_txhdr *txhdr, + const unsigned char *fragment_data, + const unsigned int fragment_len, + const int is_first_fragment, + const u16 cookie); + +/* RX header as received from the hardware. */ +struct bcm43xx_rxhdr { + /* Frame Length. Must be generated explicitely in PIO mode. */ + __le16 frame_length; + PAD_BYTES(2); + /* Flags field 1 */ + __le16 flags1; + u8 rssi; + u8 signal_quality; + PAD_BYTES(2); + /* Flags field 3 */ + __le16 flags3; + /* Flags field 2 */ + __le16 flags2; + /* Lower 16bits of the TSF at the time the frame started. */ + __le16 mactime; + PAD_BYTES(14); +} __attribute__((__packed__)); + +#define BCM43xx_RXHDR_FLAGS1_OFDM (1 << 0) +/*#define BCM43xx_RXHDR_FLAGS1_SIGNAL??? (1 << 3) FIXME */ +#define BCM43xx_RXHDR_FLAGS1_SHORTPREAMBLE (1 << 7) +#define BCM43xx_RXHDR_FLAGS1_2053RSSIADJ (1 << 14) + +#define BCM43xx_RXHDR_FLAGS2_INVALIDFRAME (1 << 0) +#define BCM43xx_RXHDR_FLAGS2_TYPE2FRAME (1 << 2) +/*FIXME: WEP related flags */ + +#define BCM43xx_RXHDR_FLAGS3_2050RSSIADJ (1 << 10) + +/* Transmit Status as received from the hardware. */ +struct bcm43xx_hwxmitstatus { + PAD_BYTES(4); + __le16 cookie; + u8 flags; + u8 cnt1:4, + cnt2:4; + PAD_BYTES(2); + __le16 seq; + __le16 unknown; //FIXME +} __attribute__((__packed__)); + +/* Transmit Status in CPU byteorder. */ +struct bcm43xx_xmitstatus { + u16 cookie; + u8 flags; + u8 cnt1:4, + cnt2:4; + u16 seq; + u16 unknown; //FIXME +}; + +#define BCM43xx_TXSTAT_FLAG_ACK 0x01 +//TODO #define BCM43xx_TXSTAT_FLAG_??? 0x02 +//TODO #define BCM43xx_TXSTAT_FLAG_??? 0x04 +//TODO #define BCM43xx_TXSTAT_FLAG_??? 0x08 +//TODO #define BCM43xx_TXSTAT_FLAG_??? 0x10 +#define BCM43xx_TXSTAT_FLAG_IGNORE 0x20 +//TODO #define BCM43xx_TXSTAT_FLAG_??? 0x40 +//TODO #define BCM43xx_TXSTAT_FLAG_??? 0x80 + +u8 bcm43xx_plcp_get_ratecode_cck(const u8 bitrate); +u8 bcm43xx_plcp_get_ratecode_ofdm(const u8 bitrate); + +int bcm43xx_rx(struct bcm43xx_private *bcm, + struct sk_buff *skb, + struct bcm43xx_rxhdr *rxhdr); + +#endif /* BCM43xx_XMIT_H_ */