diff options
Diffstat (limited to 'drivers/net/wireless/b43/xmit.c')
| -rw-r--r-- | drivers/net/wireless/b43/xmit.c | 947 |
1 files changed, 0 insertions, 947 deletions
diff --git a/drivers/net/wireless/b43/xmit.c b/drivers/net/wireless/b43/xmit.c deleted file mode 100644 index 426dc13c4..000000000 --- a/drivers/net/wireless/b43/xmit.c +++ /dev/null @@ -1,947 +0,0 @@ -/* - - Broadcom B43 wireless driver - - Transmission (TX/RX) related functions. - - Copyright (C) 2005 Martin Langer <martin-langer@gmx.de> - Copyright (C) 2005 Stefano Brivio <stefano.brivio@polimi.it> - Copyright (C) 2005, 2006 Michael Buesch <m@bues.ch> - Copyright (C) 2005 Danny van Dyk <kugelfang@gentoo.org> - Copyright (C) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch> - - 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 "xmit.h" -#include "phy_common.h" -#include "dma.h" -#include "pio.h" - -static const struct b43_tx_legacy_rate_phy_ctl_entry b43_tx_legacy_rate_phy_ctl[] = { - { B43_CCK_RATE_1MB, 0x0, 0x0 }, - { B43_CCK_RATE_2MB, 0x0, 0x1 }, - { B43_CCK_RATE_5MB, 0x0, 0x2 }, - { B43_CCK_RATE_11MB, 0x0, 0x3 }, - { B43_OFDM_RATE_6MB, B43_TXH_PHY1_CRATE_1_2, B43_TXH_PHY1_MODUL_BPSK }, - { B43_OFDM_RATE_9MB, B43_TXH_PHY1_CRATE_3_4, B43_TXH_PHY1_MODUL_BPSK }, - { B43_OFDM_RATE_12MB, B43_TXH_PHY1_CRATE_1_2, B43_TXH_PHY1_MODUL_QPSK }, - { B43_OFDM_RATE_18MB, B43_TXH_PHY1_CRATE_3_4, B43_TXH_PHY1_MODUL_QPSK }, - { B43_OFDM_RATE_24MB, B43_TXH_PHY1_CRATE_1_2, B43_TXH_PHY1_MODUL_QAM16 }, - { B43_OFDM_RATE_36MB, B43_TXH_PHY1_CRATE_3_4, B43_TXH_PHY1_MODUL_QAM16 }, - { B43_OFDM_RATE_48MB, B43_TXH_PHY1_CRATE_2_3, B43_TXH_PHY1_MODUL_QAM64 }, - { B43_OFDM_RATE_54MB, B43_TXH_PHY1_CRATE_3_4, B43_TXH_PHY1_MODUL_QAM64 }, -}; - -static const struct b43_tx_legacy_rate_phy_ctl_entry * -b43_tx_legacy_rate_phy_ctl_ent(u8 bitrate) -{ - const struct b43_tx_legacy_rate_phy_ctl_entry *e; - unsigned int i; - - for (i = 0; i < ARRAY_SIZE(b43_tx_legacy_rate_phy_ctl); i++) { - e = &(b43_tx_legacy_rate_phy_ctl[i]); - if (e->bitrate == bitrate) - return e; - } - - B43_WARN_ON(1); - return NULL; -} - -/* Extract the bitrate index out of a CCK PLCP header. */ -static int b43_plcp_get_bitrate_idx_cck(struct b43_plcp_hdr6 *plcp) -{ - switch (plcp->raw[0]) { - case 0x0A: - return 0; - case 0x14: - return 1; - case 0x37: - return 2; - case 0x6E: - return 3; - } - return -1; -} - -/* Extract the bitrate index out of an OFDM PLCP header. */ -static int b43_plcp_get_bitrate_idx_ofdm(struct b43_plcp_hdr6 *plcp, bool ghz5) -{ - /* For 2 GHz band first OFDM rate is at index 4, see main.c */ - int base = ghz5 ? 0 : 4; - - switch (plcp->raw[0] & 0xF) { - case 0xB: - return base + 0; - case 0xF: - return base + 1; - case 0xA: - return base + 2; - case 0xE: - return base + 3; - case 0x9: - return base + 4; - case 0xD: - return base + 5; - case 0x8: - return base + 6; - case 0xC: - return base + 7; - } - return -1; -} - -u8 b43_plcp_get_ratecode_cck(const u8 bitrate) -{ - switch (bitrate) { - case B43_CCK_RATE_1MB: - return 0x0A; - case B43_CCK_RATE_2MB: - return 0x14; - case B43_CCK_RATE_5MB: - return 0x37; - case B43_CCK_RATE_11MB: - return 0x6E; - } - B43_WARN_ON(1); - return 0; -} - -u8 b43_plcp_get_ratecode_ofdm(const u8 bitrate) -{ - switch (bitrate) { - case B43_OFDM_RATE_6MB: - return 0xB; - case B43_OFDM_RATE_9MB: - return 0xF; - case B43_OFDM_RATE_12MB: - return 0xA; - case B43_OFDM_RATE_18MB: - return 0xE; - case B43_OFDM_RATE_24MB: - return 0x9; - case B43_OFDM_RATE_36MB: - return 0xD; - case B43_OFDM_RATE_48MB: - return 0x8; - case B43_OFDM_RATE_54MB: - return 0xC; - } - B43_WARN_ON(1); - return 0; -} - -void b43_generate_plcp_hdr(struct b43_plcp_hdr4 *plcp, - const u16 octets, const u8 bitrate) -{ - __u8 *raw = plcp->raw; - - if (b43_is_ofdm_rate(bitrate)) { - u32 d; - - d = b43_plcp_get_ratecode_ofdm(bitrate); - B43_WARN_ON(octets & 0xF000); - d |= (octets << 5); - plcp->data = cpu_to_le32(d); - } else { - u32 plen; - - plen = octets * 16 / bitrate; - if ((octets * 16 % bitrate) > 0) { - plen++; - if ((bitrate == B43_CCK_RATE_11MB) - && ((octets * 8 % 11) < 4)) { - raw[1] = 0x84; - } else - raw[1] = 0x04; - } else - raw[1] = 0x04; - plcp->data |= cpu_to_le32(plen << 16); - raw[0] = b43_plcp_get_ratecode_cck(bitrate); - } -} - -/* TODO: verify if needed for SSLPN or LCN */ -static u16 b43_generate_tx_phy_ctl1(struct b43_wldev *dev, u8 bitrate) -{ - const struct b43_phy *phy = &dev->phy; - const struct b43_tx_legacy_rate_phy_ctl_entry *e; - u16 control = 0; - u16 bw; - - if (phy->type == B43_PHYTYPE_LP) - bw = B43_TXH_PHY1_BW_20; - else /* FIXME */ - bw = B43_TXH_PHY1_BW_20; - - if (0) { /* FIXME: MIMO */ - } else if (b43_is_cck_rate(bitrate) && phy->type != B43_PHYTYPE_LP) { - control = bw; - } else { - control = bw; - e = b43_tx_legacy_rate_phy_ctl_ent(bitrate); - if (e) { - control |= e->coding_rate; - control |= e->modulation; - } - control |= B43_TXH_PHY1_MODE_SISO; - } - - return control; -} - -static u8 b43_calc_fallback_rate(u8 bitrate) -{ - switch (bitrate) { - case B43_CCK_RATE_1MB: - return B43_CCK_RATE_1MB; - case B43_CCK_RATE_2MB: - return B43_CCK_RATE_1MB; - case B43_CCK_RATE_5MB: - return B43_CCK_RATE_2MB; - case B43_CCK_RATE_11MB: - return B43_CCK_RATE_5MB; - case B43_OFDM_RATE_6MB: - return B43_CCK_RATE_5MB; - case B43_OFDM_RATE_9MB: - return B43_OFDM_RATE_6MB; - case B43_OFDM_RATE_12MB: - return B43_OFDM_RATE_9MB; - case B43_OFDM_RATE_18MB: - return B43_OFDM_RATE_12MB; - case B43_OFDM_RATE_24MB: - return B43_OFDM_RATE_18MB; - case B43_OFDM_RATE_36MB: - return B43_OFDM_RATE_24MB; - case B43_OFDM_RATE_48MB: - return B43_OFDM_RATE_36MB; - case B43_OFDM_RATE_54MB: - return B43_OFDM_RATE_48MB; - } - B43_WARN_ON(1); - return 0; -} - -/* Generate a TX data header. */ -int b43_generate_txhdr(struct b43_wldev *dev, - u8 *_txhdr, - struct sk_buff *skb_frag, - struct ieee80211_tx_info *info, - u16 cookie) -{ - const unsigned char *fragment_data = skb_frag->data; - unsigned int fragment_len = skb_frag->len; - struct b43_txhdr *txhdr = (struct b43_txhdr *)_txhdr; - const struct b43_phy *phy = &dev->phy; - const struct ieee80211_hdr *wlhdr = - (const struct ieee80211_hdr *)fragment_data; - int use_encryption = !!info->control.hw_key; - __le16 fctl = wlhdr->frame_control; - struct ieee80211_rate *fbrate; - u8 rate, rate_fb; - int rate_ofdm, rate_fb_ofdm; - unsigned int plcp_fragment_len; - u32 mac_ctl = 0; - u16 phy_ctl = 0; - bool fill_phy_ctl1 = (phy->type == B43_PHYTYPE_LP || - phy->type == B43_PHYTYPE_N || - phy->type == B43_PHYTYPE_HT); - u8 extra_ft = 0; - struct ieee80211_rate *txrate; - struct ieee80211_tx_rate *rates; - - memset(txhdr, 0, sizeof(*txhdr)); - - txrate = ieee80211_get_tx_rate(dev->wl->hw, info); - rate = txrate ? txrate->hw_value : B43_CCK_RATE_1MB; - rate_ofdm = b43_is_ofdm_rate(rate); - fbrate = ieee80211_get_alt_retry_rate(dev->wl->hw, info, 0) ? : txrate; - rate_fb = fbrate->hw_value; - rate_fb_ofdm = b43_is_ofdm_rate(rate_fb); - - if (rate_ofdm) - txhdr->phy_rate = b43_plcp_get_ratecode_ofdm(rate); - else - txhdr->phy_rate = b43_plcp_get_ratecode_cck(rate); - txhdr->mac_frame_ctl = wlhdr->frame_control; - memcpy(txhdr->tx_receiver, wlhdr->addr1, ETH_ALEN); - - /* Calculate duration for fallback rate */ - if ((rate_fb == rate) || - (wlhdr->duration_id & cpu_to_le16(0x8000)) || - (wlhdr->duration_id == cpu_to_le16(0))) { - /* If the fallback rate equals the normal rate or the - * dur_id field contains an AID, CFP magic or 0, - * use the original dur_id field. */ - txhdr->dur_fb = wlhdr->duration_id; - } else { - txhdr->dur_fb = ieee80211_generic_frame_duration( - dev->wl->hw, info->control.vif, info->band, - fragment_len, fbrate); - } - - plcp_fragment_len = fragment_len + FCS_LEN; - if (use_encryption) { - u8 key_idx = info->control.hw_key->hw_key_idx; - struct b43_key *key; - int wlhdr_len; - size_t iv_len; - - B43_WARN_ON(key_idx >= ARRAY_SIZE(dev->key)); - key = &(dev->key[key_idx]); - - if (unlikely(!key->keyconf)) { - /* This key is invalid. This might only happen - * in a short timeframe after machine resume before - * we were able to reconfigure keys. - * Drop this packet completely. Do not transmit it - * unencrypted to avoid leaking information. */ - return -ENOKEY; - } - - /* Hardware appends ICV. */ - plcp_fragment_len += info->control.hw_key->icv_len; - - key_idx = b43_kidx_to_fw(dev, key_idx); - mac_ctl |= (key_idx << B43_TXH_MAC_KEYIDX_SHIFT) & - B43_TXH_MAC_KEYIDX; - mac_ctl |= (key->algorithm << B43_TXH_MAC_KEYALG_SHIFT) & - B43_TXH_MAC_KEYALG; - wlhdr_len = ieee80211_hdrlen(fctl); - if (key->algorithm == B43_SEC_ALGO_TKIP) { - u16 phase1key[5]; - int i; - /* we give the phase1key and iv16 here, the key is stored in - * shm. With that the hardware can do phase 2 and encryption. - */ - ieee80211_get_tkip_p1k(info->control.hw_key, skb_frag, phase1key); - /* phase1key is in host endian. Copy to little-endian txhdr->iv. */ - for (i = 0; i < 5; i++) { - txhdr->iv[i * 2 + 0] = phase1key[i]; - txhdr->iv[i * 2 + 1] = phase1key[i] >> 8; - } - /* iv16 */ - memcpy(txhdr->iv + 10, ((u8 *) wlhdr) + wlhdr_len, 3); - } else { - iv_len = min_t(size_t, info->control.hw_key->iv_len, - ARRAY_SIZE(txhdr->iv)); - memcpy(txhdr->iv, ((u8 *) wlhdr) + wlhdr_len, iv_len); - } - } - switch (dev->fw.hdr_format) { - case B43_FW_HDR_598: - b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->format_598.plcp), - plcp_fragment_len, rate); - break; - case B43_FW_HDR_351: - b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->format_351.plcp), - plcp_fragment_len, rate); - break; - case B43_FW_HDR_410: - b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->format_410.plcp), - plcp_fragment_len, rate); - break; - } - b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->plcp_fb), - plcp_fragment_len, rate_fb); - - /* Extra Frame Types */ - if (rate_fb_ofdm) - extra_ft |= B43_TXH_EFT_FB_OFDM; - else - extra_ft |= B43_TXH_EFT_FB_CCK; - - /* Set channel radio code. Note that the micrcode ORs 0x100 to - * this value before comparing it to the value in SHM, if this - * is a 5Ghz packet. - */ - txhdr->chan_radio_code = phy->channel; - - /* PHY TX Control word */ - if (rate_ofdm) - phy_ctl |= B43_TXH_PHY_ENC_OFDM; - else - phy_ctl |= B43_TXH_PHY_ENC_CCK; - if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) - phy_ctl |= B43_TXH_PHY_SHORTPRMBL; - - switch (b43_ieee80211_antenna_sanitize(dev, 0)) { - case 0: /* Default */ - phy_ctl |= B43_TXH_PHY_ANT01AUTO; - break; - case 1: /* Antenna 0 */ - phy_ctl |= B43_TXH_PHY_ANT0; - break; - case 2: /* Antenna 1 */ - phy_ctl |= B43_TXH_PHY_ANT1; - break; - case 3: /* Antenna 2 */ - phy_ctl |= B43_TXH_PHY_ANT2; - break; - case 4: /* Antenna 3 */ - phy_ctl |= B43_TXH_PHY_ANT3; - break; - default: - B43_WARN_ON(1); - } - - rates = info->control.rates; - /* MAC control */ - if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) - mac_ctl |= B43_TXH_MAC_ACK; - /* use hardware sequence counter as the non-TID counter */ - if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) - mac_ctl |= B43_TXH_MAC_HWSEQ; - if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) - mac_ctl |= B43_TXH_MAC_STMSDU; - if (!phy->gmode) - mac_ctl |= B43_TXH_MAC_5GHZ; - - /* Overwrite rates[0].count to make the retry calculation - * in the tx status easier. need the actual retry limit to - * detect whether the fallback rate was used. - */ - if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) || - (rates[0].count <= dev->wl->hw->conf.long_frame_max_tx_count)) { - rates[0].count = dev->wl->hw->conf.long_frame_max_tx_count; - mac_ctl |= B43_TXH_MAC_LONGFRAME; - } else { - rates[0].count = dev->wl->hw->conf.short_frame_max_tx_count; - } - - /* Generate the RTS or CTS-to-self frame */ - if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) || - (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) { - unsigned int len; - struct ieee80211_hdr *uninitialized_var(hdr); - int rts_rate, rts_rate_fb; - int rts_rate_ofdm, rts_rate_fb_ofdm; - struct b43_plcp_hdr6 *uninitialized_var(plcp); - struct ieee80211_rate *rts_cts_rate; - - rts_cts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info); - - rts_rate = rts_cts_rate ? rts_cts_rate->hw_value : B43_CCK_RATE_1MB; - rts_rate_ofdm = b43_is_ofdm_rate(rts_rate); - rts_rate_fb = b43_calc_fallback_rate(rts_rate); - rts_rate_fb_ofdm = b43_is_ofdm_rate(rts_rate_fb); - - if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { - struct ieee80211_cts *uninitialized_var(cts); - - switch (dev->fw.hdr_format) { - case B43_FW_HDR_598: - cts = (struct ieee80211_cts *) - (txhdr->format_598.rts_frame); - break; - case B43_FW_HDR_351: - cts = (struct ieee80211_cts *) - (txhdr->format_351.rts_frame); - break; - case B43_FW_HDR_410: - cts = (struct ieee80211_cts *) - (txhdr->format_410.rts_frame); - break; - } - ieee80211_ctstoself_get(dev->wl->hw, info->control.vif, - fragment_data, fragment_len, - info, cts); - mac_ctl |= B43_TXH_MAC_SENDCTS; - len = sizeof(struct ieee80211_cts); - } else { - struct ieee80211_rts *uninitialized_var(rts); - - switch (dev->fw.hdr_format) { - case B43_FW_HDR_598: - rts = (struct ieee80211_rts *) - (txhdr->format_598.rts_frame); - break; - case B43_FW_HDR_351: - rts = (struct ieee80211_rts *) - (txhdr->format_351.rts_frame); - break; - case B43_FW_HDR_410: - rts = (struct ieee80211_rts *) - (txhdr->format_410.rts_frame); - break; - } - ieee80211_rts_get(dev->wl->hw, info->control.vif, - fragment_data, fragment_len, - info, rts); - mac_ctl |= B43_TXH_MAC_SENDRTS; - len = sizeof(struct ieee80211_rts); - } - len += FCS_LEN; - - /* Generate the PLCP headers for the RTS/CTS frame */ - switch (dev->fw.hdr_format) { - case B43_FW_HDR_598: - plcp = &txhdr->format_598.rts_plcp; - break; - case B43_FW_HDR_351: - plcp = &txhdr->format_351.rts_plcp; - break; - case B43_FW_HDR_410: - plcp = &txhdr->format_410.rts_plcp; - break; - } - b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp, - len, rts_rate); - plcp = &txhdr->rts_plcp_fb; - b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp, - len, rts_rate_fb); - - switch (dev->fw.hdr_format) { - case B43_FW_HDR_598: - hdr = (struct ieee80211_hdr *) - (&txhdr->format_598.rts_frame); - break; - case B43_FW_HDR_351: - hdr = (struct ieee80211_hdr *) - (&txhdr->format_351.rts_frame); - break; - case B43_FW_HDR_410: - hdr = (struct ieee80211_hdr *) - (&txhdr->format_410.rts_frame); - break; - } - txhdr->rts_dur_fb = hdr->duration_id; - - if (rts_rate_ofdm) { - extra_ft |= B43_TXH_EFT_RTS_OFDM; - txhdr->phy_rate_rts = - b43_plcp_get_ratecode_ofdm(rts_rate); - } else { - extra_ft |= B43_TXH_EFT_RTS_CCK; - txhdr->phy_rate_rts = - b43_plcp_get_ratecode_cck(rts_rate); - } - if (rts_rate_fb_ofdm) - extra_ft |= B43_TXH_EFT_RTSFB_OFDM; - else - extra_ft |= B43_TXH_EFT_RTSFB_CCK; - - if (rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS && - fill_phy_ctl1) { - txhdr->phy_ctl1_rts = cpu_to_le16( - b43_generate_tx_phy_ctl1(dev, rts_rate)); - txhdr->phy_ctl1_rts_fb = cpu_to_le16( - b43_generate_tx_phy_ctl1(dev, rts_rate_fb)); - } - } - - /* Magic cookie */ - switch (dev->fw.hdr_format) { - case B43_FW_HDR_598: - txhdr->format_598.cookie = cpu_to_le16(cookie); - break; - case B43_FW_HDR_351: - txhdr->format_351.cookie = cpu_to_le16(cookie); - break; - case B43_FW_HDR_410: - txhdr->format_410.cookie = cpu_to_le16(cookie); - break; - } - - if (fill_phy_ctl1) { - txhdr->phy_ctl1 = - cpu_to_le16(b43_generate_tx_phy_ctl1(dev, rate)); - txhdr->phy_ctl1_fb = - cpu_to_le16(b43_generate_tx_phy_ctl1(dev, rate_fb)); - } - - /* Apply the bitfields */ - txhdr->mac_ctl = cpu_to_le32(mac_ctl); - txhdr->phy_ctl = cpu_to_le16(phy_ctl); - txhdr->extra_ft = extra_ft; - - return 0; -} - -static s8 b43_rssi_postprocess(struct b43_wldev *dev, - u8 in_rssi, int ofdm, - int adjust_2053, int adjust_2050) -{ - struct b43_phy *phy = &dev->phy; - struct b43_phy_g *gphy = phy->g; - s32 tmp; - - switch (phy->radio_ver) { - 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 (dev->dev->bus_sprom-> - boardflags_lo & B43_BFL_RSSI) { - if (in_rssi > 63) - in_rssi = 63; - B43_WARN_ON(phy->type != B43_PHYTYPE_G); - tmp = gphy->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 == B43_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; -} - -//TODO -#if 0 -static s8 b43_rssinoise_postprocess(struct b43_wldev *dev, u8 in_rssi) -{ - struct b43_phy *phy = &dev->phy; - s8 ret; - - if (phy->type == B43_PHYTYPE_A) { - //TODO: Incomplete specs. - ret = 0; - } else - ret = b43_rssi_postprocess(dev, in_rssi, 0, 1, 1); - - return ret; -} -#endif - -void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr) -{ - struct ieee80211_rx_status status; - struct b43_plcp_hdr6 *plcp; - struct ieee80211_hdr *wlhdr; - const struct b43_rxhdr_fw4 *rxhdr = _rxhdr; - __le16 fctl; - u16 phystat0, phystat3; - u16 uninitialized_var(chanstat), uninitialized_var(mactime); - u32 uninitialized_var(macstat); - u16 chanid; - u16 phytype; - int padding, rate_idx; - - memset(&status, 0, sizeof(status)); - - /* Get metadata about the frame from the header. */ - phystat0 = le16_to_cpu(rxhdr->phy_status0); - phystat3 = le16_to_cpu(rxhdr->phy_status3); - switch (dev->fw.hdr_format) { - case B43_FW_HDR_598: - macstat = le32_to_cpu(rxhdr->format_598.mac_status); - mactime = le16_to_cpu(rxhdr->format_598.mac_time); - chanstat = le16_to_cpu(rxhdr->format_598.channel); - break; - case B43_FW_HDR_410: - case B43_FW_HDR_351: - macstat = le32_to_cpu(rxhdr->format_351.mac_status); - mactime = le16_to_cpu(rxhdr->format_351.mac_time); - chanstat = le16_to_cpu(rxhdr->format_351.channel); - break; - } - phytype = chanstat & B43_RX_CHAN_PHYTYPE; - - if (unlikely(macstat & B43_RX_MAC_FCSERR)) { - dev->wl->ieee_stats.dot11FCSErrorCount++; - status.flag |= RX_FLAG_FAILED_FCS_CRC; - } - if (unlikely(phystat0 & (B43_RX_PHYST0_PLCPHCF | B43_RX_PHYST0_PLCPFV))) - status.flag |= RX_FLAG_FAILED_PLCP_CRC; - if (phystat0 & B43_RX_PHYST0_SHORTPRMBL) - status.flag |= RX_FLAG_SHORTPRE; - if (macstat & B43_RX_MAC_DECERR) { - /* Decryption with the given key failed. - * Drop the packet. We also won't be able to decrypt it with - * the key in software. */ - goto drop; - } - - /* Skip PLCP and padding */ - padding = (macstat & B43_RX_MAC_PADDING) ? 2 : 0; - if (unlikely(skb->len < (sizeof(struct b43_plcp_hdr6) + padding))) { - b43dbg(dev->wl, "RX: Packet size underrun (1)\n"); - goto drop; - } - plcp = (struct b43_plcp_hdr6 *)(skb->data + padding); - skb_pull(skb, sizeof(struct b43_plcp_hdr6) + padding); - /* The skb contains the Wireless Header + payload data now */ - if (unlikely(skb->len < (2 + 2 + 6 /*minimum hdr */ + FCS_LEN))) { - b43dbg(dev->wl, "RX: Packet size underrun (2)\n"); - goto drop; - } - wlhdr = (struct ieee80211_hdr *)(skb->data); - fctl = wlhdr->frame_control; - - if (macstat & B43_RX_MAC_DEC) { - unsigned int keyidx; - int wlhdr_len; - - keyidx = ((macstat & B43_RX_MAC_KEYIDX) - >> B43_RX_MAC_KEYIDX_SHIFT); - /* We must adjust the key index here. We want the "physical" - * key index, but the ucode passed it slightly different. - */ - keyidx = b43_kidx_to_raw(dev, keyidx); - B43_WARN_ON(keyidx >= ARRAY_SIZE(dev->key)); - - if (dev->key[keyidx].algorithm != B43_SEC_ALGO_NONE) { - wlhdr_len = ieee80211_hdrlen(fctl); - if (unlikely(skb->len < (wlhdr_len + 3))) { - b43dbg(dev->wl, - "RX: Packet size underrun (3)\n"); - goto drop; - } - status.flag |= RX_FLAG_DECRYPTED; - } - } - - /* Link quality statistics */ - switch (chanstat & B43_RX_CHAN_PHYTYPE) { - case B43_PHYTYPE_HT: - /* TODO: is max the right choice? */ - status.signal = max_t(__s8, - max(rxhdr->phy_ht_power0, rxhdr->phy_ht_power1), - rxhdr->phy_ht_power2); - break; - case B43_PHYTYPE_N: - /* Broadcom has code for min and avg, but always uses max */ - if (rxhdr->power0 == 16 || rxhdr->power0 == 32) - status.signal = max(rxhdr->power1, rxhdr->power2); - else - status.signal = max(rxhdr->power0, rxhdr->power1); - break; - case B43_PHYTYPE_A: - case B43_PHYTYPE_B: - case B43_PHYTYPE_G: - case B43_PHYTYPE_LP: - status.signal = b43_rssi_postprocess(dev, rxhdr->jssi, - (phystat0 & B43_RX_PHYST0_OFDM), - (phystat0 & B43_RX_PHYST0_GAINCTL), - (phystat3 & B43_RX_PHYST3_TRSTATE)); - break; - } - - if (phystat0 & B43_RX_PHYST0_OFDM) - rate_idx = b43_plcp_get_bitrate_idx_ofdm(plcp, - !!(chanstat & B43_RX_CHAN_5GHZ)); - else - rate_idx = b43_plcp_get_bitrate_idx_cck(plcp); - if (unlikely(rate_idx == -1)) { - /* PLCP seems to be corrupted. - * Drop the frame, if we are not interested in corrupted frames. */ - if (!(dev->wl->filter_flags & FIF_PLCPFAIL)) - goto drop; - } - status.rate_idx = rate_idx; - status.antenna = !!(phystat0 & B43_RX_PHYST0_ANT); - - /* - * All frames on monitor interfaces and beacons always need a full - * 64-bit timestamp. Monitor interfaces need it for diagnostic - * purposes and beacons for IBSS merging. - * This code assumes we get to process the packet within 16 bits - * of timestamp, i.e. about 65 milliseconds after the PHY received - * the first symbol. - */ - if (ieee80211_is_beacon(fctl) || dev->wl->radiotap_enabled) { - u16 low_mactime_now; - - b43_tsf_read(dev, &status.mactime); - low_mactime_now = status.mactime; - status.mactime = status.mactime & ~0xFFFFULL; - status.mactime += mactime; - if (low_mactime_now <= mactime) - status.mactime -= 0x10000; - status.flag |= RX_FLAG_MACTIME_START; - } - - chanid = (chanstat & B43_RX_CHAN_ID) >> B43_RX_CHAN_ID_SHIFT; - switch (chanstat & B43_RX_CHAN_PHYTYPE) { - case B43_PHYTYPE_A: - status.band = IEEE80211_BAND_5GHZ; - B43_WARN_ON(1); - /* FIXME: We don't really know which value the "chanid" contains. - * So the following assignment might be wrong. */ - status.freq = - ieee80211_channel_to_frequency(chanid, status.band); - break; - case B43_PHYTYPE_G: - status.band = IEEE80211_BAND_2GHZ; - /* Somewhere between 478.104 and 508.1084 firmware for G-PHY - * has been modified to be compatible with N-PHY and others. - */ - if (dev->fw.rev >= 508) - status.freq = ieee80211_channel_to_frequency(chanid, status.band); - else - status.freq = chanid + 2400; - break; - case B43_PHYTYPE_N: - case B43_PHYTYPE_LP: - case B43_PHYTYPE_HT: - /* chanid is the SHM channel cookie. Which is the plain - * channel number in b43. */ - if (chanstat & B43_RX_CHAN_5GHZ) - status.band = IEEE80211_BAND_5GHZ; - else - status.band = IEEE80211_BAND_2GHZ; - status.freq = - ieee80211_channel_to_frequency(chanid, status.band); - break; - default: - B43_WARN_ON(1); - goto drop; - } - - memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status)); - ieee80211_rx_ni(dev->wl->hw, skb); - -#if B43_DEBUG - dev->rx_count++; -#endif - return; -drop: - dev_kfree_skb_any(skb); -} - -void b43_handle_txstatus(struct b43_wldev *dev, - const struct b43_txstatus *status) -{ - b43_debugfs_log_txstat(dev, status); - - if (status->intermediate) - return; - if (status->for_ampdu) - return; - if (!status->acked) - dev->wl->ieee_stats.dot11ACKFailureCount++; - if (status->rts_count) { - if (status->rts_count == 0xF) //FIXME - dev->wl->ieee_stats.dot11RTSFailureCount++; - else - dev->wl->ieee_stats.dot11RTSSuccessCount++; - } - - if (b43_using_pio_transfers(dev)) - b43_pio_handle_txstatus(dev, status); - else - b43_dma_handle_txstatus(dev, status); - - b43_phy_txpower_check(dev, 0); -} - -/* Fill out the mac80211 TXstatus report based on the b43-specific - * txstatus report data. This returns a boolean whether the frame was - * successfully transmitted. */ -bool b43_fill_txstatus_report(struct b43_wldev *dev, - struct ieee80211_tx_info *report, - const struct b43_txstatus *status) -{ - bool frame_success = true; - int retry_limit; - - /* preserve the confiured retry limit before clearing the status - * The xmit function has overwritten the rc's value with the actual - * retry limit done by the hardware */ - retry_limit = report->status.rates[0].count; - ieee80211_tx_info_clear_status(report); - - if (status->acked) { - /* The frame was ACKed. */ - report->flags |= IEEE80211_TX_STAT_ACK; - } else { - /* The frame was not ACKed... */ - if (!(report->flags & IEEE80211_TX_CTL_NO_ACK)) { - /* ...but we expected an ACK. */ - frame_success = false; - } - } - if (status->frame_count == 0) { - /* The frame was not transmitted at all. */ - report->status.rates[0].count = 0; - } else if (status->rts_count > dev->wl->hw->conf.short_frame_max_tx_count) { - /* - * If the short retries (RTS, not data frame) have exceeded - * the limit, the hw will not have tried the selected rate, - * but will have used the fallback rate instead. - * Don't let the rate control count attempts for the selected - * rate in this case, otherwise the statistics will be off. - */ - report->status.rates[0].count = 0; - report->status.rates[1].count = status->frame_count; - } else { - if (status->frame_count > retry_limit) { - report->status.rates[0].count = retry_limit; - report->status.rates[1].count = status->frame_count - - retry_limit; - - } else { - report->status.rates[0].count = status->frame_count; - report->status.rates[1].idx = -1; - } - } - - return frame_success; -} - -/* Stop any TX operation on the device (suspend the hardware queues) */ -void b43_tx_suspend(struct b43_wldev *dev) -{ - if (b43_using_pio_transfers(dev)) - b43_pio_tx_suspend(dev); - else - b43_dma_tx_suspend(dev); -} - -/* Resume any TX operation on the device (resume the hardware queues) */ -void b43_tx_resume(struct b43_wldev *dev) -{ - if (b43_using_pio_transfers(dev)) - b43_pio_tx_resume(dev); - else - b43_dma_tx_resume(dev); -} |