[deliverable/linux.git] / drivers / net / wireless / b43legacy / xmit.c

/*

  Broadcom B43legacy 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>
  Copyright (C) 2007 Larry Finger <Larry.Finger@lwfinger.net>

  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 <net/dst.h>

#include "xmit.h"
#include "phy.h"
#include "dma.h"
#include "pio.h"


/* Extract the bitrate out of a CCK PLCP header. */
static u8 b43legacy_plcp_get_bitrate_idx_cck(struct b43legacy_plcp_hdr6 *plcp)
{
	switch (plcp->raw[0]) {
	case 0x0A:
		return 0;
	case 0x14:
		return 1;
	case 0x37:
		return 2;
	case 0x6E:
		return 3;
	}
	B43legacy_BUG_ON(1);
	return -1;
}

/* Extract the bitrate out of an OFDM PLCP header. */
static u8 b43legacy_plcp_get_bitrate_idx_ofdm(struct b43legacy_plcp_hdr6 *plcp,
					      bool aphy)
{
	int base = aphy ? 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;
	}
	B43legacy_BUG_ON(1);
	return -1;
}

u8 b43legacy_plcp_get_ratecode_cck(const u8 bitrate)
{
	switch (bitrate) {
	case B43legacy_CCK_RATE_1MB:
		return 0x0A;
	case B43legacy_CCK_RATE_2MB:
		return 0x14;
	case B43legacy_CCK_RATE_5MB:
		return 0x37;
	case B43legacy_CCK_RATE_11MB:
		return 0x6E;
	}
	B43legacy_BUG_ON(1);
	return 0;
}

u8 b43legacy_plcp_get_ratecode_ofdm(const u8 bitrate)
{
	switch (bitrate) {
	case B43legacy_OFDM_RATE_6MB:
		return 0xB;
	case B43legacy_OFDM_RATE_9MB:
		return 0xF;
	case B43legacy_OFDM_RATE_12MB:
		return 0xA;
	case B43legacy_OFDM_RATE_18MB:
		return 0xE;
	case B43legacy_OFDM_RATE_24MB:
		return 0x9;
	case B43legacy_OFDM_RATE_36MB:
		return 0xD;
	case B43legacy_OFDM_RATE_48MB:
		return 0x8;
	case B43legacy_OFDM_RATE_54MB:
		return 0xC;
	}
	B43legacy_BUG_ON(1);
	return 0;
}

void b43legacy_generate_plcp_hdr(struct b43legacy_plcp_hdr4 *plcp,
				 const u16 octets, const u8 bitrate)
{
	__le32 *data = &(plcp->data);
	__u8 *raw = plcp->raw;

	if (b43legacy_is_ofdm_rate(bitrate)) {
		u16 d;

		d = b43legacy_plcp_get_ratecode_ofdm(bitrate);
		B43legacy_WARN_ON(octets & 0xF000);
		d |= (octets << 5);
		*data = cpu_to_le32(d);
	} else {
		u32 plen;

		plen = octets * 16 / bitrate;
		if ((octets * 16 % bitrate) > 0) {
			plen++;
			if ((bitrate == B43legacy_CCK_RATE_11MB)
			    && ((octets * 8 % 11) < 4))
				raw[1] = 0x84;
			else
				raw[1] = 0x04;
		} else
			raw[1] = 0x04;
		*data |= cpu_to_le32(plen << 16);
		raw[0] = b43legacy_plcp_get_ratecode_cck(bitrate);
	}
}

static u8 b43legacy_calc_fallback_rate(u8 bitrate)
{
	switch (bitrate) {
	case B43legacy_CCK_RATE_1MB:
		return B43legacy_CCK_RATE_1MB;
	case B43legacy_CCK_RATE_2MB:
		return B43legacy_CCK_RATE_1MB;
	case B43legacy_CCK_RATE_5MB:
		return B43legacy_CCK_RATE_2MB;
	case B43legacy_CCK_RATE_11MB:
		return B43legacy_CCK_RATE_5MB;
	case B43legacy_OFDM_RATE_6MB:
		return B43legacy_CCK_RATE_5MB;
	case B43legacy_OFDM_RATE_9MB:
		return B43legacy_OFDM_RATE_6MB;
	case B43legacy_OFDM_RATE_12MB:
		return B43legacy_OFDM_RATE_9MB;
	case B43legacy_OFDM_RATE_18MB:
		return B43legacy_OFDM_RATE_12MB;
	case B43legacy_OFDM_RATE_24MB:
		return B43legacy_OFDM_RATE_18MB;
	case B43legacy_OFDM_RATE_36MB:
		return B43legacy_OFDM_RATE_24MB;
	case B43legacy_OFDM_RATE_48MB:
		return B43legacy_OFDM_RATE_36MB;
	case B43legacy_OFDM_RATE_54MB:
		return B43legacy_OFDM_RATE_48MB;
	}
	B43legacy_BUG_ON(1);
	return 0;
}

static int generate_txhdr_fw3(struct b43legacy_wldev *dev,
			       struct b43legacy_txhdr_fw3 *txhdr,
			       const unsigned char *fragment_data,
			       unsigned int fragment_len,
			       struct ieee80211_tx_info *info,
			       u16 cookie)
{
	const struct ieee80211_hdr *wlhdr;
	int use_encryption = !!info->control.hw_key;
	u8 rate;
	struct ieee80211_rate *rate_fb;
	int rate_ofdm;
	int rate_fb_ofdm;
	unsigned int plcp_fragment_len;
	u32 mac_ctl = 0;
	u16 phy_ctl = 0;
	struct ieee80211_rate *tx_rate;
	struct ieee80211_tx_rate *rates;

	wlhdr = (const struct ieee80211_hdr *)fragment_data;

	memset(txhdr, 0, sizeof(*txhdr));

	tx_rate = ieee80211_get_tx_rate(dev->wl->hw, info);

	rate = tx_rate->hw_value;
	rate_ofdm = b43legacy_is_ofdm_rate(rate);
	rate_fb = ieee80211_get_alt_retry_rate(dev->wl->hw, info, 0) ? : tx_rate;
	rate_fb_ofdm = b43legacy_is_ofdm_rate(rate_fb->hw_value);

	txhdr->mac_frame_ctl = wlhdr->frame_control;
	memcpy(txhdr->tx_receiver, wlhdr->addr1, 6);

	/* Calculate duration for fallback rate */
	if ((rate_fb->hw_value == 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,
							 fragment_len,
							 rate_fb);
	}

	plcp_fragment_len = fragment_len + FCS_LEN;
	if (use_encryption) {
		u8 key_idx = info->control.hw_key->hw_key_idx;
		struct b43legacy_key *key;
		int wlhdr_len;
		size_t iv_len;

		B43legacy_WARN_ON(key_idx >= dev->max_nr_keys);
		key = &(dev->key[key_idx]);

		if (key->enabled) {
			/* Hardware appends ICV. */
			plcp_fragment_len += info->control.hw_key->icv_len;

			key_idx = b43legacy_kidx_to_fw(dev, key_idx);
			mac_ctl |= (key_idx << B43legacy_TX4_MAC_KEYIDX_SHIFT) &
				   B43legacy_TX4_MAC_KEYIDX;
			mac_ctl |= (key->algorithm <<
				   B43legacy_TX4_MAC_KEYALG_SHIFT) &
				   B43legacy_TX4_MAC_KEYALG;
			wlhdr_len = ieee80211_hdrlen(wlhdr->frame_control);
			iv_len = min((size_t)info->control.hw_key->iv_len,
				     ARRAY_SIZE(txhdr->iv));
			memcpy(txhdr->iv, ((u8 *)wlhdr) + wlhdr_len, iv_len);
		} else {
			/* 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;
		}
	}
	b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
				    (&txhdr->plcp), plcp_fragment_len,
				    rate);
	b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
				    (&txhdr->plcp_fb), plcp_fragment_len,
				    rate_fb->hw_value);

	/* PHY TX Control word */
	if (rate_ofdm)
		phy_ctl |= B43legacy_TX4_PHY_ENC_OFDM;
	if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
		phy_ctl |= B43legacy_TX4_PHY_SHORTPRMBL;
	switch (info->antenna_sel_tx) {
	case 0:
		phy_ctl |= B43legacy_TX4_PHY_ANTLAST;
		break;
	case 1:
		phy_ctl |= B43legacy_TX4_PHY_ANT0;
		break;
	case 2:
		phy_ctl |= B43legacy_TX4_PHY_ANT1;
		break;
	default:
		B43legacy_BUG_ON(1);
	}

	/* MAC control */
	rates = info->control.rates;
	if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
		mac_ctl |= B43legacy_TX4_MAC_ACK;
	if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
		mac_ctl |= B43legacy_TX4_MAC_HWSEQ;
	if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
		mac_ctl |= B43legacy_TX4_MAC_STMSDU;
	if (rate_fb_ofdm)
		mac_ctl |= B43legacy_TX4_MAC_FALLBACKOFDM;

	/* 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 |= B43legacy_TX4_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 *hdr;
		int rts_rate;
		int rts_rate_fb;
		int rts_rate_fb_ofdm;

		rts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info)->hw_value;
		rts_rate_fb = b43legacy_calc_fallback_rate(rts_rate);
		rts_rate_fb_ofdm = b43legacy_is_ofdm_rate(rts_rate_fb);
		if (rts_rate_fb_ofdm)
			mac_ctl |= B43legacy_TX4_MAC_CTSFALLBACKOFDM;

		if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
			ieee80211_ctstoself_get(dev->wl->hw,
						info->control.vif,
						fragment_data,
						fragment_len, info,
						(struct ieee80211_cts *)
						(txhdr->rts_frame));
			mac_ctl |= B43legacy_TX4_MAC_SENDCTS;
			len = sizeof(struct ieee80211_cts);
		} else {
			ieee80211_rts_get(dev->wl->hw,
					  info->control.vif,
					  fragment_data, fragment_len, info,
					  (struct ieee80211_rts *)
					  (txhdr->rts_frame));
			mac_ctl |= B43legacy_TX4_MAC_SENDRTS;
			len = sizeof(struct ieee80211_rts);
		}
		len += FCS_LEN;
		b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
					    (&txhdr->rts_plcp),
					    len, rts_rate);
		b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
					    (&txhdr->rts_plcp_fb),
					    len, rts_rate_fb);
		hdr = (struct ieee80211_hdr *)(&txhdr->rts_frame);
		txhdr->rts_dur_fb = hdr->duration_id;
	}

	/* Magic cookie */
	txhdr->cookie = cpu_to_le16(cookie);

	/* Apply the bitfields */
	txhdr->mac_ctl = cpu_to_le32(mac_ctl);
	txhdr->phy_ctl = cpu_to_le16(phy_ctl);

	return 0;
}

int b43legacy_generate_txhdr(struct b43legacy_wldev *dev,
			      u8 *txhdr,
			      const unsigned char *fragment_data,
			      unsigned int fragment_len,
			      struct ieee80211_tx_info *info,
			      u16 cookie)
{
	return generate_txhdr_fw3(dev, (struct b43legacy_txhdr_fw3 *)txhdr,
			   fragment_data, fragment_len,
			   info, cookie);
}

static s8 b43legacy_rssi_postprocess(struct b43legacy_wldev *dev,
				     u8 in_rssi, int ofdm,
				     int adjust_2053, int adjust_2050)
{
	struct b43legacy_phy *phy = &dev->phy;
	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
			    & B43legacy_BFL_RSSI) {
				if (in_rssi > 63)
					in_rssi = 63;
				tmp = phy->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 == B43legacy_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 b43legacy_rx(struct b43legacy_wldev *dev,
		  struct sk_buff *skb,
		  const void *_rxhdr)
{
	struct ieee80211_rx_status status;
	struct b43legacy_plcp_hdr6 *plcp;
	struct ieee80211_hdr *wlhdr;
	const struct b43legacy_rxhdr_fw3 *rxhdr = _rxhdr;
	__le16 fctl;
	u16 phystat0;
	u16 phystat3;
	u16 chanstat;
	u16 mactime;
	u32 macstat;
	u16 chanid;
	u8 jssi;
	int padding;

	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);
	jssi = rxhdr->jssi;
	macstat = le16_to_cpu(rxhdr->mac_status);
	mactime = le16_to_cpu(rxhdr->mac_time);
	chanstat = le16_to_cpu(rxhdr->channel);

	if (macstat & B43legacy_RX_MAC_FCSERR)
		dev->wl->ieee_stats.dot11FCSErrorCount++;

	/* Skip PLCP and padding */
	padding = (macstat & B43legacy_RX_MAC_PADDING) ? 2 : 0;
	if (unlikely(skb->len < (sizeof(struct b43legacy_plcp_hdr6) +
	    padding))) {
		b43legacydbg(dev->wl, "RX: Packet size underrun (1)\n");
		goto drop;
	}
	plcp = (struct b43legacy_plcp_hdr6 *)(skb->data + padding);
	skb_pull(skb, sizeof(struct b43legacy_plcp_hdr6) + padding);
	/* The skb contains the Wireless Header + payload data now */
	if (unlikely(skb->len < (2+2+6/*minimum hdr*/ + FCS_LEN))) {
		b43legacydbg(dev->wl, "RX: Packet size underrun (2)\n");
		goto drop;
	}
	wlhdr = (struct ieee80211_hdr *)(skb->data);
	fctl = wlhdr->frame_control;

	if ((macstat & B43legacy_RX_MAC_DEC) &&
	    !(macstat & B43legacy_RX_MAC_DECERR)) {
		unsigned int keyidx;
		int wlhdr_len;
		int iv_len;
		int icv_len;

		keyidx = ((macstat & B43legacy_RX_MAC_KEYIDX)
			  >> B43legacy_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 = b43legacy_kidx_to_raw(dev, keyidx);
		B43legacy_WARN_ON(keyidx >= dev->max_nr_keys);

		if (dev->key[keyidx].algorithm != B43legacy_SEC_ALGO_NONE) {
			/* Remove PROTECTED flag to mark it as decrypted. */
			B43legacy_WARN_ON(!ieee80211_has_protected(fctl));
			fctl &= ~cpu_to_le16(IEEE80211_FCTL_PROTECTED);
			wlhdr->frame_control = fctl;

			wlhdr_len = ieee80211_hdrlen(fctl);
			if (unlikely(skb->len < (wlhdr_len + 3))) {
				b43legacydbg(dev->wl, "RX: Packet size"
					     " underrun3\n");
				goto drop;
			}
			if (skb->data[wlhdr_len + 3] & (1 << 5)) {
				/* The Ext-IV Bit is set in the "KeyID"
				 * octet of the IV.
				 */
				iv_len = 8;
				icv_len = 8;
			} else {
				iv_len = 4;
				icv_len = 4;
			}
			if (unlikely(skb->len < (wlhdr_len + iv_len +
			    icv_len))) {
				b43legacydbg(dev->wl, "RX: Packet size"
					     " underrun4\n");
				goto drop;
			}
			/* Remove the IV */
			memmove(skb->data + iv_len, skb->data, wlhdr_len);
			skb_pull(skb, iv_len);
			/* Remove the ICV */
			skb_trim(skb, skb->len - icv_len);

			status.flag |= RX_FLAG_DECRYPTED;
		}
	}

	status.signal = b43legacy_rssi_postprocess(dev, jssi,
				      (phystat0 & B43legacy_RX_PHYST0_OFDM),
				      (phystat0 & B43legacy_RX_PHYST0_GAINCTL),
				      (phystat3 & B43legacy_RX_PHYST3_TRSTATE));
	/* change to support A PHY */
	if (phystat0 & B43legacy_RX_PHYST0_OFDM)
		status.rate_idx = b43legacy_plcp_get_bitrate_idx_ofdm(plcp, false);
	else
		status.rate_idx = b43legacy_plcp_get_bitrate_idx_cck(plcp);
	status.antenna = !!(phystat0 & B43legacy_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;

		b43legacy_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_MPDU;
	}

	chanid = (chanstat & B43legacy_RX_CHAN_ID) >>
		  B43legacy_RX_CHAN_ID_SHIFT;
	switch (chanstat & B43legacy_RX_CHAN_PHYTYPE) {
	case B43legacy_PHYTYPE_B:
	case B43legacy_PHYTYPE_G:
		status.band = IEEE80211_BAND_2GHZ;
		status.freq = chanid + 2400;
		break;
	default:
		b43legacywarn(dev->wl, "Unexpected value for chanstat (0x%X)\n",
		       chanstat);
	}

	memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
	ieee80211_rx_irqsafe(dev->wl->hw, skb);

	return;
drop:
	b43legacydbg(dev->wl, "RX: Packet dropped\n");
	dev_kfree_skb_any(skb);
}

void b43legacy_handle_txstatus(struct b43legacy_wldev *dev,
			     const struct b43legacy_txstatus *status)
{
	b43legacy_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 (b43legacy_using_pio(dev))
		b43legacy_pio_handle_txstatus(dev, status);
	else
		b43legacy_dma_handle_txstatus(dev, status);
}

/* Handle TX status report as received through DMA/PIO queues */
void b43legacy_handle_hwtxstatus(struct b43legacy_wldev *dev,
				 const struct b43legacy_hwtxstatus *hw)
{
	struct b43legacy_txstatus status;
	u8 tmp;

	status.cookie = le16_to_cpu(hw->cookie);
	status.seq = le16_to_cpu(hw->seq);
	status.phy_stat = hw->phy_stat;
	tmp = hw->count;
	status.frame_count = (tmp >> 4);
	status.rts_count = (tmp & 0x0F);
	tmp = hw->flags << 1;
	status.supp_reason = ((tmp & 0x1C) >> 2);
	status.pm_indicated = !!(tmp & 0x80);
	status.intermediate = !!(tmp & 0x40);
	status.for_ampdu = !!(tmp & 0x20);
	status.acked = !!(tmp & 0x02);

	b43legacy_handle_txstatus(dev, &status);
}

/* Stop any TX operation on the device (suspend the hardware queues) */
void b43legacy_tx_suspend(struct b43legacy_wldev *dev)
{
	if (b43legacy_using_pio(dev))
		b43legacy_pio_freeze_txqueues(dev);
	else
		b43legacy_dma_tx_suspend(dev);
}

/* Resume any TX operation on the device (resume the hardware queues) */
void b43legacy_tx_resume(struct b43legacy_wldev *dev)
{
	if (b43legacy_using_pio(dev))
		b43legacy_pio_thaw_txqueues(dev);
	else
		b43legacy_dma_tx_resume(dev);
}

/* Initialize the QoS parameters */
void b43legacy_qos_init(struct b43legacy_wldev *dev)
{
	/* FIXME: This function must probably be called from the mac80211
	 * config callback. */
return;

	b43legacy_hf_write(dev, b43legacy_hf_read(dev) | B43legacy_HF_EDCF);
	/* FIXME kill magic */
	b43legacy_write16(dev, 0x688,
			  b43legacy_read16(dev, 0x688) | 0x4);


	/*TODO: We might need some stack support here to get the values. */
}
Commit	Line	Data
75388acd LF	1	/*
	2
	3	Broadcom B43legacy wireless driver
	4
	5	Transmission (TX/RX) related functions.
	6
	7	Copyright (C) 2005 Martin Langer <martin-langer@gmx.de>
1f21ad2a	8	Copyright (C) 2005 Stefano Brivio <stefano.brivio@polimi.it>
eb032b98	9	Copyright (C) 2005, 2006 Michael Buesch <m@bues.ch>
75388acd LF	10	Copyright (C) 2005 Danny van Dyk <kugelfang@gentoo.org>
	11	Copyright (C) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
	12	Copyright (C) 2007 Larry Finger <Larry.Finger@lwfinger.net>
	13
	14	This program is free software; you can redistribute it and/or modify
	15	it under the terms of the GNU General Public License as published by
	16	the Free Software Foundation; either version 2 of the License, or
	17	(at your option) any later version.
	18
	19	This program is distributed in the hope that it will be useful,
	20	but WITHOUT ANY WARRANTY; without even the implied warranty of
	21	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	22	GNU General Public License for more details.
	23
	24	You should have received a copy of the GNU General Public License
	25	along with this program; see the file COPYING. If not, write to
	26	the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
	27	Boston, MA 02110-1301, USA.
	28
	29	*/
	30
	31	#include <net/dst.h>
	32
	33	#include "xmit.h"
	34	#include "phy.h"
	35	#include "dma.h"
	36	#include "pio.h"
	37
	38
	39	/* Extract the bitrate out of a CCK PLCP header. */
8318d78a	40	static u8 b43legacy_plcp_get_bitrate_idx_cck(struct b43legacy_plcp_hdr6 *plcp)
75388acd LF	41	{
	42	switch (plcp->raw[0]) {
	43	case 0x0A:
8318d78a	44	return 0;
75388acd	45	case 0x14:
8318d78a	46	return 1;
75388acd	47	case 0x37:
8318d78a	48	return 2;
75388acd	49	case 0x6E:
8318d78a	50	return 3;
75388acd LF	51	}
75388acd LF	52	B43legacy_BUG_ON(1);
8318d78a	53	return -1;
75388acd LF	54	}
	55
	56	/* Extract the bitrate out of an OFDM PLCP header. */
8318d78a JB	57	static u8 b43legacy_plcp_get_bitrate_idx_ofdm(struct b43legacy_plcp_hdr6 *plcp,
8318d78a JB	58	bool aphy)
75388acd	59	{
8318d78a JB	60	int base = aphy ? 0 : 4;
8318d78a JB	61
75388acd LF	62	switch (plcp->raw[0] & 0xF) {
75388acd LF	63	case 0xB:
8318d78a	64	return base + 0;
75388acd	65	case 0xF:
8318d78a	66	return base + 1;
75388acd	67	case 0xA:
8318d78a	68	return base + 2;
75388acd	69	case 0xE:
8318d78a	70	return base + 3;
75388acd	71	case 0x9:
8318d78a	72	return base + 4;
75388acd	73	case 0xD:
8318d78a	74	return base + 5;
75388acd	75	case 0x8:
8318d78a	76	return base + 6;
75388acd	77	case 0xC:
8318d78a	78	return base + 7;
75388acd LF	79	}
75388acd LF	80	B43legacy_BUG_ON(1);
8318d78a	81	return -1;
75388acd LF	82	}
	83
	84	u8 b43legacy_plcp_get_ratecode_cck(const u8 bitrate)
	85	{
	86	switch (bitrate) {
	87	case B43legacy_CCK_RATE_1MB:
	88	return 0x0A;
	89	case B43legacy_CCK_RATE_2MB:
	90	return 0x14;
	91	case B43legacy_CCK_RATE_5MB:
	92	return 0x37;
	93	case B43legacy_CCK_RATE_11MB:
	94	return 0x6E;
	95	}
	96	B43legacy_BUG_ON(1);
	97	return 0;
	98	}
	99
	100	u8 b43legacy_plcp_get_ratecode_ofdm(const u8 bitrate)
	101	{
	102	switch (bitrate) {
	103	case B43legacy_OFDM_RATE_6MB:
	104	return 0xB;
	105	case B43legacy_OFDM_RATE_9MB:
	106	return 0xF;
	107	case B43legacy_OFDM_RATE_12MB:
	108	return 0xA;
	109	case B43legacy_OFDM_RATE_18MB:
	110	return 0xE;
	111	case B43legacy_OFDM_RATE_24MB:
	112	return 0x9;
	113	case B43legacy_OFDM_RATE_36MB:
	114	return 0xD;
	115	case B43legacy_OFDM_RATE_48MB:
	116	return 0x8;
	117	case B43legacy_OFDM_RATE_54MB:
	118	return 0xC;
	119	}
	120	B43legacy_BUG_ON(1);
	121	return 0;
	122	}
	123
	124	void b43legacy_generate_plcp_hdr(struct b43legacy_plcp_hdr4 *plcp,
	125	const u16 octets, const u8 bitrate)
	126	{
	127	__le32 *data = &(plcp->data);
	128	__u8 *raw = plcp->raw;
	129
	130	if (b43legacy_is_ofdm_rate(bitrate)) {
	131	u16 d;
	132
	133	d = b43legacy_plcp_get_ratecode_ofdm(bitrate);
	134	B43legacy_WARN_ON(octets & 0xF000);
	135	d \|= (octets << 5);
	136	*data = cpu_to_le32(d);
	137	} else {
	138	u32 plen;
	139
	140	plen = octets * 16 / bitrate;
	141	if ((octets * 16 % bitrate) > 0) {
	142	plen++;
	143	if ((bitrate == B43legacy_CCK_RATE_11MB)
	144	&& ((octets * 8 % 11) < 4))
	145	raw[1] = 0x84;
146	else
147	raw[1] = 0x04;
148	} else
149	raw[1] = 0x04;
150	*data \|= cpu_to_le32(plen << 16);
151	raw[0] = b43legacy_plcp_get_ratecode_cck(bitrate);
152	}
153	}
154
155	static u8 b43legacy_calc_fallback_rate(u8 bitrate)
156	{
157	switch (bitrate) {
158	case B43legacy_CCK_RATE_1MB:
159	return B43legacy_CCK_RATE_1MB;
160	case B43legacy_CCK_RATE_2MB:
161	return B43legacy_CCK_RATE_1MB;
162	case B43legacy_CCK_RATE_5MB:
163	return B43legacy_CCK_RATE_2MB;
164	case B43legacy_CCK_RATE_11MB:
165	return B43legacy_CCK_RATE_5MB;
166	case B43legacy_OFDM_RATE_6MB:
167	return B43legacy_CCK_RATE_5MB;
168	case B43legacy_OFDM_RATE_9MB:
169	return B43legacy_OFDM_RATE_6MB;
170	case B43legacy_OFDM_RATE_12MB:
171	return B43legacy_OFDM_RATE_9MB;
172	case B43legacy_OFDM_RATE_18MB:
173	return B43legacy_OFDM_RATE_12MB;
174	case B43legacy_OFDM_RATE_24MB:
175	return B43legacy_OFDM_RATE_18MB;
176	case B43legacy_OFDM_RATE_36MB:
177	return B43legacy_OFDM_RATE_24MB;
178	case B43legacy_OFDM_RATE_48MB:
179	return B43legacy_OFDM_RATE_36MB;
180	case B43legacy_OFDM_RATE_54MB:
181	return B43legacy_OFDM_RATE_48MB;
182	}
183	B43legacy_BUG_ON(1);
184	return 0;
185	}
186
9eca9a8e	187	static int generate_txhdr_fw3(struct b43legacy_wldev *dev,
75388acd LF	188	struct b43legacy_txhdr_fw3 *txhdr,
	189	const unsigned char *fragment_data,
	190	unsigned int fragment_len,
e6a9854b	191	struct ieee80211_tx_info *info,
75388acd LF	192	u16 cookie)
	193	{
	194	const struct ieee80211_hdr *wlhdr;
d0f09804	195	int use_encryption = !!info->control.hw_key;
75388acd	196	u8 rate;
8318d78a	197	struct ieee80211_rate *rate_fb;
75388acd LF	198	int rate_ofdm;
	199	int rate_fb_ofdm;
	200	unsigned int plcp_fragment_len;
	201	u32 mac_ctl = 0;
	202	u16 phy_ctl = 0;
2e92e6f2	203	struct ieee80211_rate *tx_rate;
e6a9854b	204	struct ieee80211_tx_rate *rates;
75388acd LF	205
75388acd LF	206	wlhdr = (const struct ieee80211_hdr *)fragment_data;
75388acd LF	207
	208	memset(txhdr, 0, sizeof(*txhdr));
	209
e039fa4a	210	tx_rate = ieee80211_get_tx_rate(dev->wl->hw, info);
2e92e6f2 JB	211
2e92e6f2 JB	212	rate = tx_rate->hw_value;
75388acd	213	rate_ofdm = b43legacy_is_ofdm_rate(rate);
870abdf6	214	rate_fb = ieee80211_get_alt_retry_rate(dev->wl->hw, info, 0) ? : tx_rate;
8318d78a	215	rate_fb_ofdm = b43legacy_is_ofdm_rate(rate_fb->hw_value);
75388acd LF	216
	217	txhdr->mac_frame_ctl = wlhdr->frame_control;
	218	memcpy(txhdr->tx_receiver, wlhdr->addr1, 6);
	219
	220	/* Calculate duration for fallback rate */
8318d78a	221	if ((rate_fb->hw_value == rate) \|\|
75388acd LF	222	(wlhdr->duration_id & cpu_to_le16(0x8000)) \|\|
	223	(wlhdr->duration_id == cpu_to_le16(0))) {
	224	/* If the fallback rate equals the normal rate or the
	225	* dur_id field contains an AID, CFP magic or 0,
	226	* use the original dur_id field. */
	227	txhdr->dur_fb = wlhdr->duration_id;
	228	} else {
75388acd	229	txhdr->dur_fb = ieee80211_generic_frame_duration(dev->wl->hw,
e039fa4a	230	info->control.vif,
75388acd	231	fragment_len,
8318d78a	232	rate_fb);
75388acd LF	233	}
	234
	235	plcp_fragment_len = fragment_len + FCS_LEN;
	236	if (use_encryption) {
e039fa4a	237	u8 key_idx = info->control.hw_key->hw_key_idx;
75388acd LF	238	struct b43legacy_key *key;
	239	int wlhdr_len;
	240	size_t iv_len;
	241
	242	B43legacy_WARN_ON(key_idx >= dev->max_nr_keys);
	243	key = &(dev->key[key_idx]);
	244
	245	if (key->enabled) {
	246	/* Hardware appends ICV. */
76708dee	247	plcp_fragment_len += info->control.hw_key->icv_len;
75388acd LF	248
	249	key_idx = b43legacy_kidx_to_fw(dev, key_idx);
	250	mac_ctl \|= (key_idx << B43legacy_TX4_MAC_KEYIDX_SHIFT) &
	251	B43legacy_TX4_MAC_KEYIDX;
	252	mac_ctl \|= (key->algorithm <<
	253	B43legacy_TX4_MAC_KEYALG_SHIFT) &
	254	B43legacy_TX4_MAC_KEYALG;
ba5b6efe	255	wlhdr_len = ieee80211_hdrlen(wlhdr->frame_control);
76708dee	256	iv_len = min((size_t)info->control.hw_key->iv_len,
75388acd LF	257	ARRAY_SIZE(txhdr->iv));
75388acd LF	258	memcpy(txhdr->iv, ((u8 *)wlhdr) + wlhdr_len, iv_len);
9eca9a8e SB	259	} else {
	260	/* This key is invalid. This might only happen
	261	* in a short timeframe after machine resume before
	262	* we were able to reconfigure keys.
	263	* Drop this packet completely. Do not transmit it
	264	* unencrypted to avoid leaking information. */
	265	return -ENOKEY;
75388acd LF	266	}
	267	}
	268	b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
	269	(&txhdr->plcp), plcp_fragment_len,
	270	rate);
	271	b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
	272	(&txhdr->plcp_fb), plcp_fragment_len,
8318d78a	273	rate_fb->hw_value);
75388acd LF	274
	275	/* PHY TX Control word */
	276	if (rate_ofdm)
2d1f96dd	277	phy_ctl \|= B43legacy_TX4_PHY_ENC_OFDM;
e6a9854b	278	if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
75388acd	279	phy_ctl \|= B43legacy_TX4_PHY_SHORTPRMBL;
e039fa4a	280	switch (info->antenna_sel_tx) {
75388acd LF	281	case 0:
	282	phy_ctl \|= B43legacy_TX4_PHY_ANTLAST;
	283	break;
	284	case 1:
	285	phy_ctl \|= B43legacy_TX4_PHY_ANT0;
	286	break;
	287	case 2:
	288	phy_ctl \|= B43legacy_TX4_PHY_ANT1;
	289	break;
	290	default:
	291	B43legacy_BUG_ON(1);
	292	}
	293
	294	/* MAC control */
e6a9854b	295	rates = info->control.rates;
e039fa4a	296	if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
75388acd	297	mac_ctl \|= B43legacy_TX4_MAC_ACK;
f591fa5d	298	if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
75388acd	299	mac_ctl \|= B43legacy_TX4_MAC_HWSEQ;
e039fa4a	300	if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
75388acd LF	301	mac_ctl \|= B43legacy_TX4_MAC_STMSDU;
	302	if (rate_fb_ofdm)
	303	mac_ctl \|= B43legacy_TX4_MAC_FALLBACKOFDM;
e6a9854b JB	304
	305	/* Overwrite rates[0].count to make the retry calculation
	306	* in the tx status easier. need the actual retry limit to
	307	* detect whether the fallback rate was used.
	308	*/
	309	if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) \|\|
	310	(rates[0].count <= dev->wl->hw->conf.long_frame_max_tx_count)) {
	311	rates[0].count = dev->wl->hw->conf.long_frame_max_tx_count;
0a6e1bee	312	mac_ctl \|= B43legacy_TX4_MAC_LONGFRAME;
e6a9854b JB	313	} else {
	314	rates[0].count = dev->wl->hw->conf.short_frame_max_tx_count;
	315	}
75388acd LF	316
75388acd LF	317	/* Generate the RTS or CTS-to-self frame */
e6a9854b JB	318	if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) \|\|
e6a9854b JB	319	(rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) {
75388acd LF	320	unsigned int len;
	321	struct ieee80211_hdr *hdr;
	322	int rts_rate;
	323	int rts_rate_fb;
75388acd LF	324	int rts_rate_fb_ofdm;
75388acd LF	325
e039fa4a	326	rts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info)->hw_value;
75388acd LF	327	rts_rate_fb = b43legacy_calc_fallback_rate(rts_rate);
	328	rts_rate_fb_ofdm = b43legacy_is_ofdm_rate(rts_rate_fb);
	329	if (rts_rate_fb_ofdm)
	330	mac_ctl \|= B43legacy_TX4_MAC_CTSFALLBACKOFDM;
	331
e6a9854b	332	if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
75388acd	333	ieee80211_ctstoself_get(dev->wl->hw,
e039fa4a	334	info->control.vif,
75388acd	335	fragment_data,
e039fa4a	336	fragment_len, info,
75388acd LF	337	(struct ieee80211_cts *)
	338	(txhdr->rts_frame));
	339	mac_ctl \|= B43legacy_TX4_MAC_SENDCTS;
	340	len = sizeof(struct ieee80211_cts);
	341	} else {
	342	ieee80211_rts_get(dev->wl->hw,
e039fa4a JB	343	info->control.vif,
e039fa4a JB	344	fragment_data, fragment_len, info,
75388acd LF	345	(struct ieee80211_rts *)
	346	(txhdr->rts_frame));
	347	mac_ctl \|= B43legacy_TX4_MAC_SENDRTS;
	348	len = sizeof(struct ieee80211_rts);
	349	}
	350	len += FCS_LEN;
	351	b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
	352	(&txhdr->rts_plcp),
	353	len, rts_rate);
	354	b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
	355	(&txhdr->rts_plcp_fb),
	356	len, rts_rate_fb);
	357	hdr = (struct ieee80211_hdr *)(&txhdr->rts_frame);
	358	txhdr->rts_dur_fb = hdr->duration_id;
75388acd LF	359	}
	360
	361	/* Magic cookie */
	362	txhdr->cookie = cpu_to_le16(cookie);
	363
	364	/* Apply the bitfields */
	365	txhdr->mac_ctl = cpu_to_le32(mac_ctl);
	366	txhdr->phy_ctl = cpu_to_le16(phy_ctl);
9eca9a8e SB	367
9eca9a8e SB	368	return 0;
75388acd LF	369	}
75388acd LF	370
9eca9a8e	371	int b43legacy_generate_txhdr(struct b43legacy_wldev *dev,
75388acd LF	372	u8 *txhdr,
	373	const unsigned char *fragment_data,
	374	unsigned int fragment_len,
e6a9854b	375	struct ieee80211_tx_info *info,
75388acd LF	376	u16 cookie)
75388acd LF	377	{
9eca9a8e	378	return generate_txhdr_fw3(dev, (struct b43legacy_txhdr_fw3 *)txhdr,
75388acd	379	fragment_data, fragment_len,
e039fa4a	380	info, cookie);
75388acd LF	381	}
	382
	383	static s8 b43legacy_rssi_postprocess(struct b43legacy_wldev *dev,
	384	u8 in_rssi, int ofdm,
	385	int adjust_2053, int adjust_2050)
	386	{
	387	struct b43legacy_phy *phy = &dev->phy;
	388	s32 tmp;
	389
	390	switch (phy->radio_ver) {
	391	case 0x2050:
	392	if (ofdm) {
	393	tmp = in_rssi;
	394	if (tmp > 127)
	395	tmp -= 256;
	396	tmp *= 73;
	397	tmp /= 64;
	398	if (adjust_2050)
	399	tmp += 25;
	400	else
	401	tmp -= 3;
	402	} else {
7797aa38	403	if (dev->dev->bus->sprom.boardflags_lo
75388acd LF	404	& B43legacy_BFL_RSSI) {
	405	if (in_rssi > 63)
	406	in_rssi = 63;
	407	tmp = phy->nrssi_lt[in_rssi];
	408	tmp = 31 - tmp;
	409	tmp *= -131;
	410	tmp /= 128;
	411	tmp -= 57;
	412	} else {
	413	tmp = in_rssi;
	414	tmp = 31 - tmp;
	415	tmp *= -149;
	416	tmp /= 128;
	417	tmp -= 68;
	418	}
	419	if (phy->type == B43legacy_PHYTYPE_G &&
	420	adjust_2050)
	421	tmp += 25;
	422	}
	423	break;
	424	case 0x2060:
	425	if (in_rssi > 127)
	426	tmp = in_rssi - 256;
	427	else
	428	tmp = in_rssi;
	429	break;
	430	default:
	431	tmp = in_rssi;
	432	tmp -= 11;
	433	tmp *= 103;
	434	tmp /= 64;
	435	if (adjust_2053)
	436	tmp -= 109;
	437	else
	438	tmp -= 83;
	439	}
	440
	441	return (s8)tmp;
	442	}
	443
	444	void b43legacy_rx(struct b43legacy_wldev *dev,
	445	struct sk_buff *skb,
	446	const void *_rxhdr)
	447	{
	448	struct ieee80211_rx_status status;
	449	struct b43legacy_plcp_hdr6 *plcp;
	450	struct ieee80211_hdr *wlhdr;
	451	const struct b43legacy_rxhdr_fw3 *rxhdr = _rxhdr;
b99a017c	452	__le16 fctl;
75388acd LF	453	u16 phystat0;
	454	u16 phystat3;
	455	u16 chanstat;
	456	u16 mactime;
	457	u32 macstat;
	458	u16 chanid;
	459	u8 jssi;
	460	int padding;
	461
	462	memset(&status, 0, sizeof(status));
	463
	464	/* Get metadata about the frame from the header. */
	465	phystat0 = le16_to_cpu(rxhdr->phy_status0);
	466	phystat3 = le16_to_cpu(rxhdr->phy_status3);
	467	jssi = rxhdr->jssi;
	468	macstat = le16_to_cpu(rxhdr->mac_status);
	469	mactime = le16_to_cpu(rxhdr->mac_time);
	470	chanstat = le16_to_cpu(rxhdr->channel);
	471
	472	if (macstat & B43legacy_RX_MAC_FCSERR)
	473	dev->wl->ieee_stats.dot11FCSErrorCount++;
	474
	475	/* Skip PLCP and padding */
	476	padding = (macstat & B43legacy_RX_MAC_PADDING) ? 2 : 0;
	477	if (unlikely(skb->len < (sizeof(struct b43legacy_plcp_hdr6) +
	478	padding))) {
	479	b43legacydbg(dev->wl, "RX: Packet size underrun (1)\n");
	480	goto drop;
	481	}
	482	plcp = (struct b43legacy_plcp_hdr6 *)(skb->data + padding);
	483	skb_pull(skb, sizeof(struct b43legacy_plcp_hdr6) + padding);
	484	/* The skb contains the Wireless Header + payload data now */
	485	if (unlikely(skb->len < (2+2+6/minimum hdr/ + FCS_LEN))) {
	486	b43legacydbg(dev->wl, "RX: Packet size underrun (2)\n");
	487	goto drop;
	488	}
	489	wlhdr = (struct ieee80211_hdr *)(skb->data);
b99a017c	490	fctl = wlhdr->frame_control;
75388acd LF	491
	492	if ((macstat & B43legacy_RX_MAC_DEC) &&
	493	!(macstat & B43legacy_RX_MAC_DECERR)) {
	494	unsigned int keyidx;
	495	int wlhdr_len;
	496	int iv_len;
	497	int icv_len;
	498
	499	keyidx = ((macstat & B43legacy_RX_MAC_KEYIDX)
	500	>> B43legacy_RX_MAC_KEYIDX_SHIFT);
	501	/* We must adjust the key index here. We want the "physical"
	502	* key index, but the ucode passed it slightly different.
	503	*/
	504	keyidx = b43legacy_kidx_to_raw(dev, keyidx);
	505	B43legacy_WARN_ON(keyidx >= dev->max_nr_keys);
	506
	507	if (dev->key[keyidx].algorithm != B43legacy_SEC_ALGO_NONE) {
	508	/* Remove PROTECTED flag to mark it as decrypted. */
b99a017c HH	509	B43legacy_WARN_ON(!ieee80211_has_protected(fctl));
	510	fctl &= ~cpu_to_le16(IEEE80211_FCTL_PROTECTED);
	511	wlhdr->frame_control = fctl;
75388acd	512
b99a017c	513	wlhdr_len = ieee80211_hdrlen(fctl);
75388acd LF	514	if (unlikely(skb->len < (wlhdr_len + 3))) {
	515	b43legacydbg(dev->wl, "RX: Packet size"
	516	" underrun3\n");
	517	goto drop;
	518	}
	519	if (skb->data[wlhdr_len + 3] & (1 << 5)) {
	520	/* The Ext-IV Bit is set in the "KeyID"
	521	* octet of the IV.
	522	*/
	523	iv_len = 8;
	524	icv_len = 8;
	525	} else {
	526	iv_len = 4;
	527	icv_len = 4;
	528	}
	529	if (unlikely(skb->len < (wlhdr_len + iv_len +
	530	icv_len))) {
	531	b43legacydbg(dev->wl, "RX: Packet size"
	532	" underrun4\n");
	533	goto drop;
	534	}
	535	/* Remove the IV */
	536	memmove(skb->data + iv_len, skb->data, wlhdr_len);
	537	skb_pull(skb, iv_len);
	538	/* Remove the ICV */
	539	skb_trim(skb, skb->len - icv_len);
	540
	541	status.flag \|= RX_FLAG_DECRYPTED;
	542	}
	543	}
	544
566bfe5a	545	status.signal = b43legacy_rssi_postprocess(dev, jssi,
75388acd LF	546	(phystat0 & B43legacy_RX_PHYST0_OFDM),
	547	(phystat0 & B43legacy_RX_PHYST0_GAINCTL),
	548	(phystat3 & B43legacy_RX_PHYST3_TRSTATE));
8318d78a	549	/* change to support A PHY */
75388acd	550	if (phystat0 & B43legacy_RX_PHYST0_OFDM)
8318d78a	551	status.rate_idx = b43legacy_plcp_get_bitrate_idx_ofdm(plcp, false);
75388acd	552	else
8318d78a	553	status.rate_idx = b43legacy_plcp_get_bitrate_idx_cck(plcp);
75388acd	554	status.antenna = !!(phystat0 & B43legacy_RX_PHYST0_ANT);
c0ddd04d JL	555
c0ddd04d JL	556	/*
d007b7f4 JB	557	* All frames on monitor interfaces and beacons always need a full
	558	* 64-bit timestamp. Monitor interfaces need it for diagnostic
	559	* purposes and beacons for IBSS merging.
	560	* This code assumes we get to process the packet within 16 bits
	561	* of timestamp, i.e. about 65 milliseconds after the PHY received
	562	* the first symbol.
c0ddd04d	563	*/
b99a017c	564	if (ieee80211_is_beacon(fctl) \|\| dev->wl->radiotap_enabled) {
c0ddd04d JL	565	u16 low_mactime_now;
	566
	567	b43legacy_tsf_read(dev, &status.mactime);
	568	low_mactime_now = status.mactime;
	569	status.mactime = status.mactime & ~0xFFFFULL;
	570	status.mactime += mactime;
	571	if (low_mactime_now <= mactime)
	572	status.mactime -= 0x10000;
6ebacbb7	573	status.flag \|= RX_FLAG_MACTIME_MPDU;
c0ddd04d	574	}
75388acd LF	575
	576	chanid = (chanstat & B43legacy_RX_CHAN_ID) >>
	577	B43legacy_RX_CHAN_ID_SHIFT;
	578	switch (chanstat & B43legacy_RX_CHAN_PHYTYPE) {
	579	case B43legacy_PHYTYPE_B:
75388acd	580	case B43legacy_PHYTYPE_G:
8318d78a	581	status.band = IEEE80211_BAND_2GHZ;
75388acd	582	status.freq = chanid + 2400;
75388acd LF	583	break;
	584	default:
	585	b43legacywarn(dev->wl, "Unexpected value for chanstat (0x%X)\n",
	586	chanstat);
	587	}
	588
f1d58c25 JB	589	memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
f1d58c25 JB	590	ieee80211_rx_irqsafe(dev->wl->hw, skb);
75388acd LF	591
	592	return;
	593	drop:
	594	b43legacydbg(dev->wl, "RX: Packet dropped\n");
	595	dev_kfree_skb_any(skb);
	596	}
	597
	598	void b43legacy_handle_txstatus(struct b43legacy_wldev *dev,
	599	const struct b43legacy_txstatus *status)
	600	{
	601	b43legacy_debugfs_log_txstat(dev, status);
	602
	603	if (status->intermediate)
	604	return;
	605	if (status->for_ampdu)
	606	return;
	607	if (!status->acked)
	608	dev->wl->ieee_stats.dot11ACKFailureCount++;
	609	if (status->rts_count) {
	610	if (status->rts_count == 0xF) /* FIXME */
	611	dev->wl->ieee_stats.dot11RTSFailureCount++;
	612	else
	613	dev->wl->ieee_stats.dot11RTSSuccessCount++;
	614	}
	615
	616	if (b43legacy_using_pio(dev))
	617	b43legacy_pio_handle_txstatus(dev, status);
	618	else
	619	b43legacy_dma_handle_txstatus(dev, status);
	620	}
	621
	622	/* Handle TX status report as received through DMA/PIO queues */
	623	void b43legacy_handle_hwtxstatus(struct b43legacy_wldev *dev,
	624	const struct b43legacy_hwtxstatus *hw)
	625	{
	626	struct b43legacy_txstatus status;
	627	u8 tmp;
	628
	629	status.cookie = le16_to_cpu(hw->cookie);
	630	status.seq = le16_to_cpu(hw->seq);
	631	status.phy_stat = hw->phy_stat;
	632	tmp = hw->count;
	633	status.frame_count = (tmp >> 4);
	634	status.rts_count = (tmp & 0x0F);
c6a2afda	635	tmp = hw->flags << 1;
75388acd LF	636	status.supp_reason = ((tmp & 0x1C) >> 2);
	637	status.pm_indicated = !!(tmp & 0x80);
	638	status.intermediate = !!(tmp & 0x40);
	639	status.for_ampdu = !!(tmp & 0x20);
	640	status.acked = !!(tmp & 0x02);
	641
	642	b43legacy_handle_txstatus(dev, &status);
	643	}
	644
	645	/* Stop any TX operation on the device (suspend the hardware queues) */
	646	void b43legacy_tx_suspend(struct b43legacy_wldev *dev)
	647	{
	648	if (b43legacy_using_pio(dev))
	649	b43legacy_pio_freeze_txqueues(dev);
	650	else
	651	b43legacy_dma_tx_suspend(dev);
	652	}
	653
	654	/* Resume any TX operation on the device (resume the hardware queues) */
	655	void b43legacy_tx_resume(struct b43legacy_wldev *dev)
	656	{
	657	if (b43legacy_using_pio(dev))
	658	b43legacy_pio_thaw_txqueues(dev);
	659	else
	660	b43legacy_dma_tx_resume(dev);
	661	}
	662
	663	/* Initialize the QoS parameters */
	664	void b43legacy_qos_init(struct b43legacy_wldev *dev)
	665	{
	666	/* FIXME: This function must probably be called from the mac80211
	667	* config callback. */
	668	return;
	669
	670	b43legacy_hf_write(dev, b43legacy_hf_read(dev) \| B43legacy_HF_EDCF);
	671	/* FIXME kill magic */
	672	b43legacy_write16(dev, 0x688,
	673	b43legacy_read16(dev, 0x688) \| 0x4);
	674
	675
	676	/TODO: We might need some stack support here to get the values. /
	677	}