--- /dev/null
+/*
+
+ 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);
+}
Code Review / kvmfornfv.git / blobdiff