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[PATCH] zd1211rw: Use softmac ERP handling functionality
This adds zd1211rw driver support for the softmac functionality I added a while back. We now obey changes in basic rates, use short preamble if it is available (but long if the AP says it's not), and send self-CTS in the proper situations. Locking fixed and improved by Ulrich Kunitz. Signed-off-by: Daniel Drake <dsd@gentoo.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Daniel Drake
Jeff Garzik
parent
b1cd84167b
commit
b1382edef9
@ -1076,6 +1076,31 @@ static int set_mandatory_rates(struct zd_chip *chip, enum ieee80211_std std)
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return zd_iowrite32_locked(chip, rates, CR_MANDATORY_RATE_TBL);
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}
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int zd_chip_set_rts_cts_rate_locked(struct zd_chip *chip,
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u8 rts_rate, int preamble)
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{
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int rts_mod = ZD_RX_CCK;
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u32 value = 0;
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/* Modulation bit */
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if (ZD_CS_TYPE(rts_rate) == ZD_CS_OFDM)
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rts_mod = ZD_RX_OFDM;
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dev_dbg_f(zd_chip_dev(chip), "rts_rate=%x preamble=%x\n",
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rts_rate, preamble);
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value |= rts_rate << RTSCTS_SH_RTS_RATE;
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value |= rts_mod << RTSCTS_SH_RTS_MOD_TYPE;
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value |= preamble << RTSCTS_SH_RTS_PMB_TYPE;
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value |= preamble << RTSCTS_SH_CTS_PMB_TYPE;
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/* We always send 11M self-CTS messages, like the vendor driver. */
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value |= ZD_CCK_RATE_11M << RTSCTS_SH_CTS_RATE;
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value |= ZD_RX_CCK << RTSCTS_SH_CTS_MOD_TYPE;
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return zd_iowrite32_locked(chip, value, CR_RTS_CTS_RATE);
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}
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int zd_chip_enable_hwint(struct zd_chip *chip)
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{
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int r;
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@ -1355,17 +1380,12 @@ out:
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return r;
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}
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int zd_chip_set_basic_rates(struct zd_chip *chip, u16 cr_rates)
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int zd_chip_set_basic_rates_locked(struct zd_chip *chip, u16 cr_rates)
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{
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int r;
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ZD_ASSERT((cr_rates & ~(CR_RATES_80211B | CR_RATES_80211G)) == 0);
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dev_dbg_f(zd_chip_dev(chip), "%x\n", cr_rates);
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if (cr_rates & ~(CR_RATES_80211B|CR_RATES_80211G))
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return -EINVAL;
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mutex_lock(&chip->mutex);
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r = zd_iowrite32_locked(chip, cr_rates, CR_BASIC_RATE_TBL);
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mutex_unlock(&chip->mutex);
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return r;
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return zd_iowrite32_locked(chip, cr_rates, CR_BASIC_RATE_TBL);
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}
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static int ofdm_qual_db(u8 status_quality, u8 rate, unsigned int size)
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@ -420,6 +420,15 @@
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#define CR_MANDATORY_RATE_TBL CTL_REG(0x0634)
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#define CR_RTS_CTS_RATE CTL_REG(0x0638)
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/* These are all bit indexes in CR_RTS_CTS_RATE, so remember to shift. */
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#define RTSCTS_SH_RTS_RATE 0
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#define RTSCTS_SH_EXP_CTS_RATE 4
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#define RTSCTS_SH_RTS_MOD_TYPE 8
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#define RTSCTS_SH_RTS_PMB_TYPE 9
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#define RTSCTS_SH_CTS_RATE 16
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#define RTSCTS_SH_CTS_MOD_TYPE 24
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#define RTSCTS_SH_CTS_PMB_TYPE 25
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#define CR_WEP_PROTECT CTL_REG(0x063C)
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#define CR_RX_THRESHOLD CTL_REG(0x0640)
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@ -794,6 +803,9 @@ void zd_chip_disable_rx(struct zd_chip *chip);
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int zd_chip_enable_hwint(struct zd_chip *chip);
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int zd_chip_disable_hwint(struct zd_chip *chip);
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int zd_chip_set_rts_cts_rate_locked(struct zd_chip *chip,
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u8 rts_rate, int preamble);
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static inline int zd_get_encryption_type(struct zd_chip *chip, u32 *type)
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{
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return zd_ioread32(chip, CR_ENCRYPTION_TYPE, type);
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@ -809,7 +821,17 @@ static inline int zd_chip_get_basic_rates(struct zd_chip *chip, u16 *cr_rates)
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return zd_ioread16(chip, CR_BASIC_RATE_TBL, cr_rates);
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}
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int zd_chip_set_basic_rates(struct zd_chip *chip, u16 cr_rates);
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int zd_chip_set_basic_rates_locked(struct zd_chip *chip, u16 cr_rates);
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static inline int zd_chip_set_basic_rates(struct zd_chip *chip, u16 cr_rates)
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{
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int r;
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mutex_lock(&chip->mutex);
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r = zd_chip_set_basic_rates_locked(chip, cr_rates);
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mutex_unlock(&chip->mutex);
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return r;
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}
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static inline int zd_chip_set_rx_filter(struct zd_chip *chip, u32 filter)
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{
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@ -32,6 +32,8 @@
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static void ieee_init(struct ieee80211_device *ieee);
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static void softmac_init(struct ieee80211softmac_device *sm);
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static void set_rts_cts_work(void *d);
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static void set_basic_rates_work(void *d);
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static void housekeeping_init(struct zd_mac *mac);
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static void housekeeping_enable(struct zd_mac *mac);
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@ -46,6 +48,8 @@ int zd_mac_init(struct zd_mac *mac,
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memset(mac, 0, sizeof(*mac));
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spin_lock_init(&mac->lock);
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mac->netdev = netdev;
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INIT_WORK(&mac->set_rts_cts_work, set_rts_cts_work, mac);
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INIT_WORK(&mac->set_basic_rates_work, set_basic_rates_work, mac);
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ieee_init(ieee);
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softmac_init(ieee80211_priv(netdev));
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@ -213,6 +217,13 @@ int zd_mac_stop(struct net_device *netdev)
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housekeeping_disable(mac);
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ieee80211softmac_stop(netdev);
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/* Ensure no work items are running or queued from this point */
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cancel_delayed_work(&mac->set_rts_cts_work);
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cancel_delayed_work(&mac->set_basic_rates_work);
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flush_workqueue(zd_workqueue);
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mac->updating_rts_rate = 0;
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mac->updating_basic_rates = 0;
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zd_chip_disable_hwint(chip);
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zd_chip_switch_radio_off(chip);
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zd_chip_disable_int(chip);
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@ -286,6 +297,186 @@ u8 zd_mac_get_regdomain(struct zd_mac *mac)
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return regdomain;
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}
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/* Fallback to lowest rate, if rate is unknown. */
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static u8 rate_to_zd_rate(u8 rate)
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{
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switch (rate) {
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case IEEE80211_CCK_RATE_2MB:
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return ZD_CCK_RATE_2M;
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case IEEE80211_CCK_RATE_5MB:
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return ZD_CCK_RATE_5_5M;
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case IEEE80211_CCK_RATE_11MB:
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return ZD_CCK_RATE_11M;
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case IEEE80211_OFDM_RATE_6MB:
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return ZD_OFDM_RATE_6M;
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case IEEE80211_OFDM_RATE_9MB:
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return ZD_OFDM_RATE_9M;
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case IEEE80211_OFDM_RATE_12MB:
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return ZD_OFDM_RATE_12M;
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case IEEE80211_OFDM_RATE_18MB:
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return ZD_OFDM_RATE_18M;
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case IEEE80211_OFDM_RATE_24MB:
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return ZD_OFDM_RATE_24M;
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case IEEE80211_OFDM_RATE_36MB:
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return ZD_OFDM_RATE_36M;
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case IEEE80211_OFDM_RATE_48MB:
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return ZD_OFDM_RATE_48M;
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case IEEE80211_OFDM_RATE_54MB:
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return ZD_OFDM_RATE_54M;
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}
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return ZD_CCK_RATE_1M;
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}
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static u16 rate_to_cr_rate(u8 rate)
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{
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switch (rate) {
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case IEEE80211_CCK_RATE_2MB:
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return CR_RATE_1M;
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case IEEE80211_CCK_RATE_5MB:
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return CR_RATE_5_5M;
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case IEEE80211_CCK_RATE_11MB:
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return CR_RATE_11M;
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case IEEE80211_OFDM_RATE_6MB:
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return CR_RATE_6M;
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case IEEE80211_OFDM_RATE_9MB:
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return CR_RATE_9M;
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case IEEE80211_OFDM_RATE_12MB:
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return CR_RATE_12M;
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case IEEE80211_OFDM_RATE_18MB:
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return CR_RATE_18M;
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case IEEE80211_OFDM_RATE_24MB:
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return CR_RATE_24M;
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case IEEE80211_OFDM_RATE_36MB:
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return CR_RATE_36M;
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case IEEE80211_OFDM_RATE_48MB:
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return CR_RATE_48M;
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case IEEE80211_OFDM_RATE_54MB:
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return CR_RATE_54M;
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}
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return CR_RATE_1M;
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}
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static void try_enable_tx(struct zd_mac *mac)
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{
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unsigned long flags;
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spin_lock_irqsave(&mac->lock, flags);
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if (mac->updating_rts_rate == 0 && mac->updating_basic_rates == 0)
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netif_wake_queue(mac->netdev);
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spin_unlock_irqrestore(&mac->lock, flags);
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}
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static void set_rts_cts_work(void *d)
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{
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struct zd_mac *mac = d;
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unsigned long flags;
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u8 rts_rate;
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unsigned int short_preamble;
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mutex_lock(&mac->chip.mutex);
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spin_lock_irqsave(&mac->lock, flags);
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mac->updating_rts_rate = 0;
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rts_rate = mac->rts_rate;
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short_preamble = mac->short_preamble;
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spin_unlock_irqrestore(&mac->lock, flags);
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zd_chip_set_rts_cts_rate_locked(&mac->chip, rts_rate, short_preamble);
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mutex_unlock(&mac->chip.mutex);
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try_enable_tx(mac);
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}
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static void set_basic_rates_work(void *d)
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{
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struct zd_mac *mac = d;
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unsigned long flags;
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u16 basic_rates;
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mutex_lock(&mac->chip.mutex);
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spin_lock_irqsave(&mac->lock, flags);
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mac->updating_basic_rates = 0;
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basic_rates = mac->basic_rates;
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spin_unlock_irqrestore(&mac->lock, flags);
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zd_chip_set_basic_rates_locked(&mac->chip, basic_rates);
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mutex_unlock(&mac->chip.mutex);
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try_enable_tx(mac);
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}
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static void bssinfo_change(struct net_device *netdev, u32 changes)
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{
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struct zd_mac *mac = zd_netdev_mac(netdev);
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struct ieee80211softmac_device *softmac = ieee80211_priv(netdev);
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struct ieee80211softmac_bss_info *bssinfo = &softmac->bssinfo;
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int need_set_rts_cts = 0;
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int need_set_rates = 0;
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u16 basic_rates;
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unsigned long flags;
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dev_dbg_f(zd_mac_dev(mac), "changes: %x\n", changes);
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if (changes & IEEE80211SOFTMAC_BSSINFOCHG_SHORT_PREAMBLE) {
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spin_lock_irqsave(&mac->lock, flags);
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mac->short_preamble = bssinfo->short_preamble;
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spin_unlock_irqrestore(&mac->lock, flags);
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need_set_rts_cts = 1;
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}
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if (changes & IEEE80211SOFTMAC_BSSINFOCHG_RATES) {
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/* Set RTS rate to highest available basic rate */
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u8 rate = ieee80211softmac_highest_supported_rate(softmac,
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&bssinfo->supported_rates, 1);
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rate = rate_to_zd_rate(rate);
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spin_lock_irqsave(&mac->lock, flags);
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if (rate != mac->rts_rate) {
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mac->rts_rate = rate;
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need_set_rts_cts = 1;
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}
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spin_unlock_irqrestore(&mac->lock, flags);
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/* Set basic rates */
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need_set_rates = 1;
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if (bssinfo->supported_rates.count == 0) {
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/* Allow the device to be flexible */
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basic_rates = CR_RATES_80211B | CR_RATES_80211G;
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} else {
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int i = 0;
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basic_rates = 0;
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for (i = 0; i < bssinfo->supported_rates.count; i++) {
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u16 rate = bssinfo->supported_rates.rates[i];
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if ((rate & IEEE80211_BASIC_RATE_MASK) == 0)
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continue;
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rate &= ~IEEE80211_BASIC_RATE_MASK;
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basic_rates |= rate_to_cr_rate(rate);
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}
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}
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spin_lock_irqsave(&mac->lock, flags);
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mac->basic_rates = basic_rates;
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spin_unlock_irqrestore(&mac->lock, flags);
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}
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/* Schedule any changes we made above */
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spin_lock_irqsave(&mac->lock, flags);
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if (need_set_rts_cts && !mac->updating_rts_rate) {
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mac->updating_rts_rate = 1;
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netif_stop_queue(mac->netdev);
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queue_work(zd_workqueue, &mac->set_rts_cts_work);
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}
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if (need_set_rates && !mac->updating_basic_rates) {
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mac->updating_basic_rates = 1;
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netif_stop_queue(mac->netdev);
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queue_work(zd_workqueue, &mac->set_basic_rates_work);
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}
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spin_unlock_irqrestore(&mac->lock, flags);
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}
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static void set_channel(struct net_device *netdev, u8 channel)
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{
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struct zd_mac *mac = zd_netdev_mac(netdev);
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@ -346,36 +537,6 @@ static u8 zd_rate_typed(u8 zd_rate)
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return typed_rates[zd_rate & ZD_CS_RATE_MASK];
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}
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/* Fallback to lowest rate, if rate is unknown. */
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static u8 rate_to_zd_rate(u8 rate)
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{
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switch (rate) {
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case IEEE80211_CCK_RATE_2MB:
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return ZD_CCK_RATE_2M;
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case IEEE80211_CCK_RATE_5MB:
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return ZD_CCK_RATE_5_5M;
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case IEEE80211_CCK_RATE_11MB:
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return ZD_CCK_RATE_11M;
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case IEEE80211_OFDM_RATE_6MB:
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return ZD_OFDM_RATE_6M;
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case IEEE80211_OFDM_RATE_9MB:
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return ZD_OFDM_RATE_9M;
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case IEEE80211_OFDM_RATE_12MB:
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return ZD_OFDM_RATE_12M;
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case IEEE80211_OFDM_RATE_18MB:
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return ZD_OFDM_RATE_18M;
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case IEEE80211_OFDM_RATE_24MB:
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return ZD_OFDM_RATE_24M;
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case IEEE80211_OFDM_RATE_36MB:
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return ZD_OFDM_RATE_36M;
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case IEEE80211_OFDM_RATE_48MB:
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return ZD_OFDM_RATE_48M;
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case IEEE80211_OFDM_RATE_54MB:
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return ZD_OFDM_RATE_54M;
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}
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return ZD_CCK_RATE_1M;
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}
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int zd_mac_set_mode(struct zd_mac *mac, u32 mode)
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{
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struct ieee80211_device *ieee;
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@ -550,37 +711,34 @@ static void cs_set_modulation(struct zd_mac *mac, struct zd_ctrlset *cs,
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u16 ftype = WLAN_FC_GET_TYPE(le16_to_cpu(hdr->frame_ctl));
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u8 rate, zd_rate;
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int is_mgt = (ftype == IEEE80211_FTYPE_MGMT) != 0;
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int is_multicast = is_multicast_ether_addr(hdr->addr1);
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int short_preamble = ieee80211softmac_short_preamble_ok(softmac,
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is_multicast, is_mgt);
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int flags = 0;
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/* FIXME: 802.11a? short preamble? */
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rate = ieee80211softmac_suggest_txrate(softmac,
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is_multicast_ether_addr(hdr->addr1), is_mgt);
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/* FIXME: 802.11a? */
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rate = ieee80211softmac_suggest_txrate(softmac, is_multicast, is_mgt);
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if (short_preamble)
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flags |= R2M_SHORT_PREAMBLE;
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zd_rate = rate_to_zd_rate(rate);
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cs->modulation = zd_rate_to_modulation(zd_rate, 0);
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cs->modulation = zd_rate_to_modulation(zd_rate, flags);
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}
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static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs,
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struct ieee80211_hdr_4addr *header)
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{
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struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev);
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unsigned int tx_length = le16_to_cpu(cs->tx_length);
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u16 fctl = le16_to_cpu(header->frame_ctl);
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u16 ftype = WLAN_FC_GET_TYPE(fctl);
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u16 stype = WLAN_FC_GET_STYPE(fctl);
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/*
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* CONTROL:
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* - start at 0x00
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* - if fragment 0, enable bit 0
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* CONTROL TODO:
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* - if backoff needed, enable bit 0
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* - if burst (backoff not needed) disable bit 0
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* - if multicast, enable bit 1
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* - if PS-POLL frame, enable bit 2
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* - if in INDEPENDENT_BSS mode and zd1205_DestPowerSave, then enable
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* bit 4 (FIXME: wtf)
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* - if frag_len > RTS threshold, set bit 5 as long if it isnt
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* multicast or mgt
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* - if bit 5 is set, and we are in OFDM mode, unset bit 5 and set bit
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* 7
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*/
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cs->control = 0;
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@ -597,17 +755,18 @@ static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs,
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if (stype == IEEE80211_STYPE_PSPOLL)
|
||||
cs->control |= ZD_CS_PS_POLL_FRAME;
|
||||
|
||||
/* Unicast data frames over the threshold should have RTS */
|
||||
if (!is_multicast_ether_addr(header->addr1) &&
|
||||
ftype != IEEE80211_FTYPE_MGMT &&
|
||||
tx_length > zd_netdev_ieee80211(mac->netdev)->rts)
|
||||
{
|
||||
/* FIXME: check the logic */
|
||||
if (ZD_CS_TYPE(cs->modulation) == ZD_CS_OFDM) {
|
||||
/* 802.11g */
|
||||
cs->control |= ZD_CS_SELF_CTS;
|
||||
} else { /* 802.11b */
|
||||
cs->control |= ZD_CS_RTS;
|
||||
}
|
||||
ftype != IEEE80211_FTYPE_MGMT &&
|
||||
tx_length > zd_netdev_ieee80211(mac->netdev)->rts)
|
||||
cs->control |= ZD_CS_RTS;
|
||||
|
||||
/* Use CTS-to-self protection if required */
|
||||
if (ZD_CS_TYPE(cs->modulation) == ZD_CS_OFDM &&
|
||||
ieee80211softmac_protection_needed(softmac)) {
|
||||
/* FIXME: avoid sending RTS *and* self-CTS, is that correct? */
|
||||
cs->control &= ~ZD_CS_RTS;
|
||||
cs->control |= ZD_CS_SELF_CTS;
|
||||
}
|
||||
|
||||
/* FIXME: Management frame? */
|
||||
@ -985,6 +1144,7 @@ static void ieee_init(struct ieee80211_device *ieee)
|
||||
static void softmac_init(struct ieee80211softmac_device *sm)
|
||||
{
|
||||
sm->set_channel = set_channel;
|
||||
sm->bssinfo_change = bssinfo_change;
|
||||
}
|
||||
|
||||
struct iw_statistics *zd_mac_get_wireless_stats(struct net_device *ndev)
|
||||
|
||||
@ -20,6 +20,7 @@
|
||||
|
||||
#include <linux/wireless.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/workqueue.h>
|
||||
#include <net/ieee80211.h>
|
||||
#include <net/ieee80211softmac.h>
|
||||
|
||||
@ -127,15 +128,33 @@ struct zd_mac {
|
||||
struct zd_chip chip;
|
||||
spinlock_t lock;
|
||||
struct net_device *netdev;
|
||||
|
||||
/* Unlocked reading possible */
|
||||
struct iw_statistics iw_stats;
|
||||
|
||||
struct housekeeping housekeeping;
|
||||
struct work_struct set_rts_cts_work;
|
||||
struct work_struct set_basic_rates_work;
|
||||
|
||||
unsigned int stats_count;
|
||||
u8 qual_buffer[ZD_MAC_STATS_BUFFER_SIZE];
|
||||
u8 rssi_buffer[ZD_MAC_STATS_BUFFER_SIZE];
|
||||
u8 regdomain;
|
||||
u8 default_regdomain;
|
||||
u8 requested_channel;
|
||||
|
||||
/* A bitpattern of cr_rates */
|
||||
u16 basic_rates;
|
||||
|
||||
/* A zd_rate */
|
||||
u8 rts_rate;
|
||||
|
||||
/* Short preamble (used for RTS/CTS) */
|
||||
unsigned int short_preamble:1;
|
||||
|
||||
/* flags to indicate update in progress */
|
||||
unsigned int updating_rts_rate:1;
|
||||
unsigned int updating_basic_rates:1;
|
||||
};
|
||||
|
||||
static inline struct ieee80211_device *zd_mac_to_ieee80211(struct zd_mac *mac)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user