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913 lines
24 KiB
913 lines
24 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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Broadcom B43 wireless driver |
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Transmission (TX/RX) related functions. |
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Copyright (C) 2005 Martin Langer <[email protected]> |
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Copyright (C) 2005 Stefano Brivio <[email protected]> |
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Copyright (C) 2005, 2006 Michael Buesch <[email protected]> |
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Copyright (C) 2005 Danny van Dyk <[email protected]> |
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Copyright (C) 2005 Andreas Jaggi <[email protected]> |
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*/ |
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#include "xmit.h" |
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#include "phy_common.h" |
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#include "dma.h" |
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#include "pio.h" |
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static const struct b43_tx_legacy_rate_phy_ctl_entry b43_tx_legacy_rate_phy_ctl[] = { |
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{ B43_CCK_RATE_1MB, 0x0, 0x0 }, |
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{ B43_CCK_RATE_2MB, 0x0, 0x1 }, |
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{ B43_CCK_RATE_5MB, 0x0, 0x2 }, |
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{ B43_CCK_RATE_11MB, 0x0, 0x3 }, |
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{ B43_OFDM_RATE_6MB, B43_TXH_PHY1_CRATE_1_2, B43_TXH_PHY1_MODUL_BPSK }, |
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{ B43_OFDM_RATE_9MB, B43_TXH_PHY1_CRATE_3_4, B43_TXH_PHY1_MODUL_BPSK }, |
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{ B43_OFDM_RATE_12MB, B43_TXH_PHY1_CRATE_1_2, B43_TXH_PHY1_MODUL_QPSK }, |
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{ B43_OFDM_RATE_18MB, B43_TXH_PHY1_CRATE_3_4, B43_TXH_PHY1_MODUL_QPSK }, |
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{ B43_OFDM_RATE_24MB, B43_TXH_PHY1_CRATE_1_2, B43_TXH_PHY1_MODUL_QAM16 }, |
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{ B43_OFDM_RATE_36MB, B43_TXH_PHY1_CRATE_3_4, B43_TXH_PHY1_MODUL_QAM16 }, |
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{ B43_OFDM_RATE_48MB, B43_TXH_PHY1_CRATE_2_3, B43_TXH_PHY1_MODUL_QAM64 }, |
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{ B43_OFDM_RATE_54MB, B43_TXH_PHY1_CRATE_3_4, B43_TXH_PHY1_MODUL_QAM64 }, |
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}; |
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static const struct b43_tx_legacy_rate_phy_ctl_entry * |
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b43_tx_legacy_rate_phy_ctl_ent(u8 bitrate) |
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{ |
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const struct b43_tx_legacy_rate_phy_ctl_entry *e; |
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unsigned int i; |
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for (i = 0; i < ARRAY_SIZE(b43_tx_legacy_rate_phy_ctl); i++) { |
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e = &(b43_tx_legacy_rate_phy_ctl[i]); |
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if (e->bitrate == bitrate) |
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return e; |
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} |
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B43_WARN_ON(1); |
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return NULL; |
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} |
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/* Extract the bitrate index out of a CCK PLCP header. */ |
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static int b43_plcp_get_bitrate_idx_cck(struct b43_plcp_hdr6 *plcp) |
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{ |
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switch (plcp->raw[0]) { |
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case 0x0A: |
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return 0; |
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case 0x14: |
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return 1; |
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case 0x37: |
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return 2; |
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case 0x6E: |
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return 3; |
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} |
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return -1; |
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} |
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/* Extract the bitrate index out of an OFDM PLCP header. */ |
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static int b43_plcp_get_bitrate_idx_ofdm(struct b43_plcp_hdr6 *plcp, bool ghz5) |
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{ |
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/* For 2 GHz band first OFDM rate is at index 4, see main.c */ |
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int base = ghz5 ? 0 : 4; |
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switch (plcp->raw[0] & 0xF) { |
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case 0xB: |
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return base + 0; |
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case 0xF: |
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return base + 1; |
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case 0xA: |
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return base + 2; |
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case 0xE: |
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return base + 3; |
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case 0x9: |
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return base + 4; |
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case 0xD: |
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return base + 5; |
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case 0x8: |
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return base + 6; |
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case 0xC: |
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return base + 7; |
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} |
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return -1; |
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} |
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u8 b43_plcp_get_ratecode_cck(const u8 bitrate) |
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{ |
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switch (bitrate) { |
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case B43_CCK_RATE_1MB: |
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return 0x0A; |
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case B43_CCK_RATE_2MB: |
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return 0x14; |
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case B43_CCK_RATE_5MB: |
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return 0x37; |
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case B43_CCK_RATE_11MB: |
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return 0x6E; |
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} |
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B43_WARN_ON(1); |
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return 0; |
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} |
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u8 b43_plcp_get_ratecode_ofdm(const u8 bitrate) |
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{ |
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switch (bitrate) { |
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case B43_OFDM_RATE_6MB: |
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return 0xB; |
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case B43_OFDM_RATE_9MB: |
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return 0xF; |
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case B43_OFDM_RATE_12MB: |
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return 0xA; |
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case B43_OFDM_RATE_18MB: |
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return 0xE; |
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case B43_OFDM_RATE_24MB: |
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return 0x9; |
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case B43_OFDM_RATE_36MB: |
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return 0xD; |
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case B43_OFDM_RATE_48MB: |
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return 0x8; |
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case B43_OFDM_RATE_54MB: |
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return 0xC; |
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} |
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B43_WARN_ON(1); |
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return 0; |
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} |
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void b43_generate_plcp_hdr(struct b43_plcp_hdr4 *plcp, |
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const u16 octets, const u8 bitrate) |
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{ |
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__u8 *raw = plcp->raw; |
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if (b43_is_ofdm_rate(bitrate)) { |
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u32 d; |
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d = b43_plcp_get_ratecode_ofdm(bitrate); |
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B43_WARN_ON(octets & 0xF000); |
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d |= (octets << 5); |
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plcp->data = cpu_to_le32(d); |
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} else { |
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u32 plen; |
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plen = octets * 16 / bitrate; |
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if ((octets * 16 % bitrate) > 0) { |
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plen++; |
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if ((bitrate == B43_CCK_RATE_11MB) |
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&& ((octets * 8 % 11) < 4)) { |
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raw[1] = 0x84; |
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} else |
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raw[1] = 0x04; |
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} else |
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raw[1] = 0x04; |
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plcp->data |= cpu_to_le32(plen << 16); |
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raw[0] = b43_plcp_get_ratecode_cck(bitrate); |
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} |
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} |
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/* TODO: verify if needed for SSLPN or LCN */ |
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static u16 b43_generate_tx_phy_ctl1(struct b43_wldev *dev, u8 bitrate) |
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{ |
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const struct b43_phy *phy = &dev->phy; |
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const struct b43_tx_legacy_rate_phy_ctl_entry *e; |
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u16 control = 0; |
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u16 bw; |
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if (phy->type == B43_PHYTYPE_LP) |
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bw = B43_TXH_PHY1_BW_20; |
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else /* FIXME */ |
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bw = B43_TXH_PHY1_BW_20; |
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if (0) { /* FIXME: MIMO */ |
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} else if (b43_is_cck_rate(bitrate) && phy->type != B43_PHYTYPE_LP) { |
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control = bw; |
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} else { |
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control = bw; |
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e = b43_tx_legacy_rate_phy_ctl_ent(bitrate); |
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if (e) { |
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control |= e->coding_rate; |
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control |= e->modulation; |
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} |
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control |= B43_TXH_PHY1_MODE_SISO; |
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} |
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return control; |
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} |
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static u8 b43_calc_fallback_rate(u8 bitrate, int gmode) |
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{ |
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switch (bitrate) { |
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case B43_CCK_RATE_1MB: |
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return B43_CCK_RATE_1MB; |
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case B43_CCK_RATE_2MB: |
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return B43_CCK_RATE_1MB; |
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case B43_CCK_RATE_5MB: |
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return B43_CCK_RATE_2MB; |
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case B43_CCK_RATE_11MB: |
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return B43_CCK_RATE_5MB; |
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/* |
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* Don't just fallback to CCK; it may be in 5GHz operation |
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* and falling back to CCK won't work out very well. |
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*/ |
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case B43_OFDM_RATE_6MB: |
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if (gmode) |
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return B43_CCK_RATE_5MB; |
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else |
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return B43_OFDM_RATE_6MB; |
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case B43_OFDM_RATE_9MB: |
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return B43_OFDM_RATE_6MB; |
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case B43_OFDM_RATE_12MB: |
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return B43_OFDM_RATE_9MB; |
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case B43_OFDM_RATE_18MB: |
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return B43_OFDM_RATE_12MB; |
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case B43_OFDM_RATE_24MB: |
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return B43_OFDM_RATE_18MB; |
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case B43_OFDM_RATE_36MB: |
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return B43_OFDM_RATE_24MB; |
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case B43_OFDM_RATE_48MB: |
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return B43_OFDM_RATE_36MB; |
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case B43_OFDM_RATE_54MB: |
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return B43_OFDM_RATE_48MB; |
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} |
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B43_WARN_ON(1); |
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return 0; |
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} |
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/* Generate a TX data header. */ |
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int b43_generate_txhdr(struct b43_wldev *dev, |
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u8 *_txhdr, |
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struct sk_buff *skb_frag, |
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struct ieee80211_tx_info *info, |
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u16 cookie) |
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{ |
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const unsigned char *fragment_data = skb_frag->data; |
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unsigned int fragment_len = skb_frag->len; |
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struct b43_txhdr *txhdr = (struct b43_txhdr *)_txhdr; |
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const struct b43_phy *phy = &dev->phy; |
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const struct ieee80211_hdr *wlhdr = |
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(const struct ieee80211_hdr *)fragment_data; |
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int use_encryption = !!info->control.hw_key; |
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__le16 fctl = wlhdr->frame_control; |
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struct ieee80211_rate *fbrate; |
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u8 rate, rate_fb; |
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int rate_ofdm, rate_fb_ofdm; |
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unsigned int plcp_fragment_len; |
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u32 mac_ctl = 0; |
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u16 phy_ctl = 0; |
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bool fill_phy_ctl1 = (phy->type == B43_PHYTYPE_LP || |
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phy->type == B43_PHYTYPE_N || |
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phy->type == B43_PHYTYPE_HT); |
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u8 extra_ft = 0; |
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struct ieee80211_rate *txrate; |
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struct ieee80211_tx_rate *rates; |
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memset(txhdr, 0, sizeof(*txhdr)); |
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txrate = ieee80211_get_tx_rate(dev->wl->hw, info); |
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rate = txrate ? txrate->hw_value : B43_CCK_RATE_1MB; |
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rate_ofdm = b43_is_ofdm_rate(rate); |
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fbrate = ieee80211_get_alt_retry_rate(dev->wl->hw, info, 0) ? : txrate; |
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rate_fb = fbrate->hw_value; |
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rate_fb_ofdm = b43_is_ofdm_rate(rate_fb); |
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if (rate_ofdm) |
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txhdr->phy_rate = b43_plcp_get_ratecode_ofdm(rate); |
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else |
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txhdr->phy_rate = b43_plcp_get_ratecode_cck(rate); |
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txhdr->mac_frame_ctl = wlhdr->frame_control; |
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memcpy(txhdr->tx_receiver, wlhdr->addr1, ETH_ALEN); |
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/* Calculate duration for fallback rate */ |
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if ((rate_fb == rate) || |
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(wlhdr->duration_id & cpu_to_le16(0x8000)) || |
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(wlhdr->duration_id == cpu_to_le16(0))) { |
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/* If the fallback rate equals the normal rate or the |
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* dur_id field contains an AID, CFP magic or 0, |
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* use the original dur_id field. */ |
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txhdr->dur_fb = wlhdr->duration_id; |
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} else { |
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txhdr->dur_fb = ieee80211_generic_frame_duration( |
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dev->wl->hw, info->control.vif, info->band, |
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fragment_len, fbrate); |
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} |
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plcp_fragment_len = fragment_len + FCS_LEN; |
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if (use_encryption) { |
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u8 key_idx = info->control.hw_key->hw_key_idx; |
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struct b43_key *key; |
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int wlhdr_len; |
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size_t iv_len; |
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B43_WARN_ON(key_idx >= ARRAY_SIZE(dev->key)); |
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key = &(dev->key[key_idx]); |
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if (unlikely(!key->keyconf)) { |
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/* This key is invalid. This might only happen |
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* in a short timeframe after machine resume before |
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* we were able to reconfigure keys. |
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* Drop this packet completely. Do not transmit it |
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* unencrypted to avoid leaking information. */ |
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return -ENOKEY; |
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} |
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/* Hardware appends ICV. */ |
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plcp_fragment_len += info->control.hw_key->icv_len; |
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key_idx = b43_kidx_to_fw(dev, key_idx); |
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mac_ctl |= (key_idx << B43_TXH_MAC_KEYIDX_SHIFT) & |
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B43_TXH_MAC_KEYIDX; |
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mac_ctl |= (key->algorithm << B43_TXH_MAC_KEYALG_SHIFT) & |
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B43_TXH_MAC_KEYALG; |
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wlhdr_len = ieee80211_hdrlen(fctl); |
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if (key->algorithm == B43_SEC_ALGO_TKIP) { |
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u16 phase1key[5]; |
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int i; |
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/* we give the phase1key and iv16 here, the key is stored in |
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* shm. With that the hardware can do phase 2 and encryption. |
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*/ |
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ieee80211_get_tkip_p1k(info->control.hw_key, skb_frag, phase1key); |
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/* phase1key is in host endian. Copy to little-endian txhdr->iv. */ |
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for (i = 0; i < 5; i++) { |
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txhdr->iv[i * 2 + 0] = phase1key[i]; |
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txhdr->iv[i * 2 + 1] = phase1key[i] >> 8; |
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} |
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/* iv16 */ |
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memcpy(txhdr->iv + 10, ((u8 *) wlhdr) + wlhdr_len, 3); |
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} else { |
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iv_len = min_t(size_t, info->control.hw_key->iv_len, |
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ARRAY_SIZE(txhdr->iv)); |
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memcpy(txhdr->iv, ((u8 *) wlhdr) + wlhdr_len, iv_len); |
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} |
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} |
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switch (dev->fw.hdr_format) { |
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case B43_FW_HDR_598: |
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b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->format_598.plcp), |
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plcp_fragment_len, rate); |
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break; |
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case B43_FW_HDR_351: |
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b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->format_351.plcp), |
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plcp_fragment_len, rate); |
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break; |
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case B43_FW_HDR_410: |
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b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->format_410.plcp), |
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plcp_fragment_len, rate); |
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break; |
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} |
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b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->plcp_fb), |
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plcp_fragment_len, rate_fb); |
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/* Extra Frame Types */ |
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if (rate_fb_ofdm) |
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extra_ft |= B43_TXH_EFT_FB_OFDM; |
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else |
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extra_ft |= B43_TXH_EFT_FB_CCK; |
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|
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/* Set channel radio code. Note that the micrcode ORs 0x100 to |
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* this value before comparing it to the value in SHM, if this |
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* is a 5Ghz packet. |
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*/ |
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txhdr->chan_radio_code = phy->channel; |
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|
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/* PHY TX Control word */ |
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if (rate_ofdm) |
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phy_ctl |= B43_TXH_PHY_ENC_OFDM; |
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else |
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phy_ctl |= B43_TXH_PHY_ENC_CCK; |
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if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) |
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phy_ctl |= B43_TXH_PHY_SHORTPRMBL; |
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switch (b43_ieee80211_antenna_sanitize(dev, 0)) { |
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case 0: /* Default */ |
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phy_ctl |= B43_TXH_PHY_ANT01AUTO; |
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break; |
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case 1: /* Antenna 0 */ |
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phy_ctl |= B43_TXH_PHY_ANT0; |
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break; |
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case 2: /* Antenna 1 */ |
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phy_ctl |= B43_TXH_PHY_ANT1; |
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break; |
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case 3: /* Antenna 2 */ |
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phy_ctl |= B43_TXH_PHY_ANT2; |
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break; |
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case 4: /* Antenna 3 */ |
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phy_ctl |= B43_TXH_PHY_ANT3; |
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break; |
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default: |
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B43_WARN_ON(1); |
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} |
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|
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rates = info->control.rates; |
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/* MAC control */ |
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if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) |
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mac_ctl |= B43_TXH_MAC_ACK; |
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/* use hardware sequence counter as the non-TID counter */ |
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if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) |
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mac_ctl |= B43_TXH_MAC_HWSEQ; |
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if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) |
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mac_ctl |= B43_TXH_MAC_STMSDU; |
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if (!phy->gmode) |
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mac_ctl |= B43_TXH_MAC_5GHZ; |
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|
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/* Overwrite rates[0].count to make the retry calculation |
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* in the tx status easier. need the actual retry limit to |
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* detect whether the fallback rate was used. |
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*/ |
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if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) || |
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(rates[0].count <= dev->wl->hw->conf.long_frame_max_tx_count)) { |
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rates[0].count = dev->wl->hw->conf.long_frame_max_tx_count; |
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mac_ctl |= B43_TXH_MAC_LONGFRAME; |
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} else { |
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rates[0].count = dev->wl->hw->conf.short_frame_max_tx_count; |
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} |
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|
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/* Generate the RTS or CTS-to-self frame */ |
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if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) || |
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(rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) { |
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unsigned int len; |
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struct ieee80211_hdr *hdr; |
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int rts_rate, rts_rate_fb; |
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int rts_rate_ofdm, rts_rate_fb_ofdm; |
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struct b43_plcp_hdr6 *plcp; |
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struct ieee80211_rate *rts_cts_rate; |
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|
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rts_cts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info); |
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|
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rts_rate = rts_cts_rate ? rts_cts_rate->hw_value : B43_CCK_RATE_1MB; |
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rts_rate_ofdm = b43_is_ofdm_rate(rts_rate); |
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rts_rate_fb = b43_calc_fallback_rate(rts_rate, phy->gmode); |
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rts_rate_fb_ofdm = b43_is_ofdm_rate(rts_rate_fb); |
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|
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if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { |
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struct ieee80211_cts *cts; |
|
|
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switch (dev->fw.hdr_format) { |
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case B43_FW_HDR_598: |
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cts = (struct ieee80211_cts *) |
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(txhdr->format_598.rts_frame); |
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break; |
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case B43_FW_HDR_351: |
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cts = (struct ieee80211_cts *) |
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(txhdr->format_351.rts_frame); |
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break; |
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case B43_FW_HDR_410: |
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cts = (struct ieee80211_cts *) |
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(txhdr->format_410.rts_frame); |
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break; |
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} |
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ieee80211_ctstoself_get(dev->wl->hw, info->control.vif, |
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fragment_data, fragment_len, |
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info, cts); |
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mac_ctl |= B43_TXH_MAC_SENDCTS; |
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len = sizeof(struct ieee80211_cts); |
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} else { |
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struct ieee80211_rts *rts; |
|
|
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switch (dev->fw.hdr_format) { |
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case B43_FW_HDR_598: |
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rts = (struct ieee80211_rts *) |
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(txhdr->format_598.rts_frame); |
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break; |
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case B43_FW_HDR_351: |
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rts = (struct ieee80211_rts *) |
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(txhdr->format_351.rts_frame); |
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break; |
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case B43_FW_HDR_410: |
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rts = (struct ieee80211_rts *) |
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(txhdr->format_410.rts_frame); |
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break; |
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} |
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ieee80211_rts_get(dev->wl->hw, info->control.vif, |
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fragment_data, fragment_len, |
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info, rts); |
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mac_ctl |= B43_TXH_MAC_SENDRTS; |
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len = sizeof(struct ieee80211_rts); |
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} |
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len += FCS_LEN; |
|
|
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/* Generate the PLCP headers for the RTS/CTS frame */ |
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switch (dev->fw.hdr_format) { |
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case B43_FW_HDR_598: |
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plcp = &txhdr->format_598.rts_plcp; |
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break; |
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case B43_FW_HDR_351: |
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plcp = &txhdr->format_351.rts_plcp; |
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break; |
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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; |
|
} |
|
|
|
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 chanstat, mactime; |
|
u32 macstat; |
|
u16 chanid; |
|
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; |
|
} |
|
|
|
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.enc_flags |= RX_ENC_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_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_G: |
|
status.band = NL80211_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 = NL80211_BAND_5GHZ; |
|
else |
|
status.band = NL80211_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); |
|
}
|
|
|