module_param_named(all_channels, modparam_all_channels, bool, S_IRUGO);
MODULE_PARM_DESC(all_channels, "Expose all channels the device can use.");
-
-/******************\
-* Internal defines *
-\******************/
-
/* Module info */
MODULE_AUTHOR("Jiri Slaby");
MODULE_AUTHOR("Nick Kossifidis");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_VERSION("0.6.0 (EXPERIMENTAL)");
+static int ath5k_reset(struct ath5k_softc *sc, struct ieee80211_channel *chan);
+static int ath5k_beacon_update(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif);
+static void ath5k_beacon_update_timers(struct ath5k_softc *sc, u64 bc_tsf);
/* Known PCI ids */
static DEFINE_PCI_DEVICE_TABLE(ath5k_pci_id_table) = {
/* XR missing */
};
-/*
- * Prototypes - PCI stack related functions
- */
-static int __devinit ath5k_pci_probe(struct pci_dev *pdev,
- const struct pci_device_id *id);
-static void __devexit ath5k_pci_remove(struct pci_dev *pdev);
-#ifdef CONFIG_PM_SLEEP
-static int ath5k_pci_suspend(struct device *dev);
-static int ath5k_pci_resume(struct device *dev);
-
-static SIMPLE_DEV_PM_OPS(ath5k_pm_ops, ath5k_pci_suspend, ath5k_pci_resume);
-#define ATH5K_PM_OPS (&ath5k_pm_ops)
-#else
-#define ATH5K_PM_OPS NULL
-#endif /* CONFIG_PM_SLEEP */
-
-static struct pci_driver ath5k_pci_driver = {
- .name = KBUILD_MODNAME,
- .id_table = ath5k_pci_id_table,
- .probe = ath5k_pci_probe,
- .remove = __devexit_p(ath5k_pci_remove),
- .driver.pm = ATH5K_PM_OPS,
-};
-
-
-
-/*
- * Prototypes - MAC 802.11 stack related functions
- */
-static int ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb);
-static int ath5k_tx_queue(struct ieee80211_hw *hw, struct sk_buff *skb,
- struct ath5k_txq *txq);
-static int ath5k_reset(struct ath5k_softc *sc, struct ieee80211_channel *chan);
-static int ath5k_start(struct ieee80211_hw *hw);
-static void ath5k_stop(struct ieee80211_hw *hw);
-static int ath5k_add_interface(struct ieee80211_hw *hw,
- struct ieee80211_vif *vif);
-static void ath5k_remove_interface(struct ieee80211_hw *hw,
- struct ieee80211_vif *vif);
-static int ath5k_config(struct ieee80211_hw *hw, u32 changed);
-static u64 ath5k_prepare_multicast(struct ieee80211_hw *hw,
- struct netdev_hw_addr_list *mc_list);
-static void ath5k_configure_filter(struct ieee80211_hw *hw,
- unsigned int changed_flags,
- unsigned int *new_flags,
- u64 multicast);
-static int ath5k_set_key(struct ieee80211_hw *hw,
- enum set_key_cmd cmd,
- struct ieee80211_vif *vif, struct ieee80211_sta *sta,
- struct ieee80211_key_conf *key);
-static int ath5k_get_stats(struct ieee80211_hw *hw,
- struct ieee80211_low_level_stats *stats);
-static int ath5k_get_survey(struct ieee80211_hw *hw,
- int idx, struct survey_info *survey);
-static u64 ath5k_get_tsf(struct ieee80211_hw *hw);
-static void ath5k_set_tsf(struct ieee80211_hw *hw, u64 tsf);
-static void ath5k_reset_tsf(struct ieee80211_hw *hw);
-static int ath5k_beacon_update(struct ieee80211_hw *hw,
- struct ieee80211_vif *vif);
-static void ath5k_bss_info_changed(struct ieee80211_hw *hw,
- struct ieee80211_vif *vif,
- struct ieee80211_bss_conf *bss_conf,
- u32 changes);
-static void ath5k_sw_scan_start(struct ieee80211_hw *hw);
-static void ath5k_sw_scan_complete(struct ieee80211_hw *hw);
-static void ath5k_set_coverage_class(struct ieee80211_hw *hw,
- u8 coverage_class);
-
-static const struct ieee80211_ops ath5k_hw_ops = {
- .tx = ath5k_tx,
- .start = ath5k_start,
- .stop = ath5k_stop,
- .add_interface = ath5k_add_interface,
- .remove_interface = ath5k_remove_interface,
- .config = ath5k_config,
- .prepare_multicast = ath5k_prepare_multicast,
- .configure_filter = ath5k_configure_filter,
- .set_key = ath5k_set_key,
- .get_stats = ath5k_get_stats,
- .get_survey = ath5k_get_survey,
- .conf_tx = NULL,
- .get_tsf = ath5k_get_tsf,
- .set_tsf = ath5k_set_tsf,
- .reset_tsf = ath5k_reset_tsf,
- .bss_info_changed = ath5k_bss_info_changed,
- .sw_scan_start = ath5k_sw_scan_start,
- .sw_scan_complete = ath5k_sw_scan_complete,
- .set_coverage_class = ath5k_set_coverage_class,
-};
-
-/*
- * Prototypes - Internal functions
- */
-/* Attach detach */
-static int ath5k_attach(struct pci_dev *pdev,
- struct ieee80211_hw *hw);
-static void ath5k_detach(struct pci_dev *pdev,
- struct ieee80211_hw *hw);
-/* Channel/mode setup */
-static inline short ath5k_ieee2mhz(short chan);
-static unsigned int ath5k_copy_channels(struct ath5k_hw *ah,
- struct ieee80211_channel *channels,
- unsigned int mode,
- unsigned int max);
-static int ath5k_setup_bands(struct ieee80211_hw *hw);
-static int ath5k_chan_set(struct ath5k_softc *sc,
- struct ieee80211_channel *chan);
-static void ath5k_setcurmode(struct ath5k_softc *sc,
- unsigned int mode);
-static void ath5k_mode_setup(struct ath5k_softc *sc);
-
-/* Descriptor setup */
-static int ath5k_desc_alloc(struct ath5k_softc *sc,
- struct pci_dev *pdev);
-static void ath5k_desc_free(struct ath5k_softc *sc,
- struct pci_dev *pdev);
-/* Buffers setup */
-static int ath5k_rxbuf_setup(struct ath5k_softc *sc,
- struct ath5k_buf *bf);
-static int ath5k_txbuf_setup(struct ath5k_softc *sc,
- struct ath5k_buf *bf,
- struct ath5k_txq *txq, int padsize);
-
static inline void ath5k_txbuf_free_skb(struct ath5k_softc *sc,
struct ath5k_buf *bf)
{
}
-/* Queues setup */
-static struct ath5k_txq *ath5k_txq_setup(struct ath5k_softc *sc,
- int qtype, int subtype);
-static int ath5k_beaconq_setup(struct ath5k_hw *ah);
-static int ath5k_beaconq_config(struct ath5k_softc *sc);
-static void ath5k_txq_drainq(struct ath5k_softc *sc,
- struct ath5k_txq *txq);
-static void ath5k_txq_cleanup(struct ath5k_softc *sc);
-static void ath5k_txq_release(struct ath5k_softc *sc);
-/* Rx handling */
-static int ath5k_rx_start(struct ath5k_softc *sc);
-static void ath5k_rx_stop(struct ath5k_softc *sc);
-static unsigned int ath5k_rx_decrypted(struct ath5k_softc *sc,
- struct sk_buff *skb,
- struct ath5k_rx_status *rs);
-static void ath5k_tasklet_rx(unsigned long data);
-/* Tx handling */
-static void ath5k_tx_processq(struct ath5k_softc *sc,
- struct ath5k_txq *txq);
-static void ath5k_tasklet_tx(unsigned long data);
-/* Beacon handling */
-static int ath5k_beacon_setup(struct ath5k_softc *sc,
- struct ath5k_buf *bf);
-static void ath5k_beacon_send(struct ath5k_softc *sc);
-static void ath5k_beacon_config(struct ath5k_softc *sc);
-static void ath5k_beacon_update_timers(struct ath5k_softc *sc, u64 bc_tsf);
-static void ath5k_tasklet_beacon(unsigned long data);
-static void ath5k_tasklet_ani(unsigned long data);
-
static inline u64 ath5k_extend_tsf(struct ath5k_hw *ah, u32 rstamp)
{
u64 tsf = ath5k_hw_get_tsf64(ah);
return (tsf & ~0x7fff) | rstamp;
}
-/* Interrupt handling */
-static int ath5k_init(struct ath5k_softc *sc);
-static int ath5k_stop_locked(struct ath5k_softc *sc);
-static int ath5k_stop_hw(struct ath5k_softc *sc);
-static irqreturn_t ath5k_intr(int irq, void *dev_id);
-static void ath5k_reset_work(struct work_struct *work);
-
-static void ath5k_tasklet_calibrate(unsigned long data);
-
-/*
- * Module init/exit functions
- */
-static int __init
-init_ath5k_pci(void)
-{
- int ret;
-
- ath5k_debug_init();
-
- ret = pci_register_driver(&ath5k_pci_driver);
- if (ret) {
- printk(KERN_ERR "ath5k_pci: can't register pci driver\n");
- return ret;
- }
-
- return 0;
-}
-
-static void __exit
-exit_ath5k_pci(void)
-{
- pci_unregister_driver(&ath5k_pci_driver);
-
- ath5k_debug_finish();
-}
-
-module_init(init_ath5k_pci);
-module_exit(exit_ath5k_pci);
-
-
-/********************\
-* PCI Initialization *
-\********************/
-
static const char *
ath5k_chip_name(enum ath5k_srev_type type, u_int16_t val)
{
.write = ath5k_iowrite32,
};
-static int __devinit
-ath5k_pci_probe(struct pci_dev *pdev,
- const struct pci_device_id *id)
+/***********************\
+* Driver Initialization *
+\***********************/
+
+static int ath5k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
{
- void __iomem *mem;
- struct ath5k_softc *sc;
- struct ath_common *common;
- struct ieee80211_hw *hw;
- int ret;
- u8 csz;
+ struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
+ struct ath5k_softc *sc = hw->priv;
+ struct ath_regulatory *regulatory = ath5k_hw_regulatory(sc->ah);
- /*
- * L0s needs to be disabled on all ath5k cards.
- *
- * For distributions shipping with CONFIG_PCIEASPM (this will be enabled
- * by default in the future in 2.6.36) this will also mean both L1 and
- * L0s will be disabled when a pre 1.1 PCIe device is detected. We do
- * know L1 works correctly even for all ath5k pre 1.1 PCIe devices
- * though but cannot currently undue the effect of a blacklist, for
- * details you can read pcie_aspm_sanity_check() and see how it adjusts
- * the device link capability.
- *
- * It may be possible in the future to implement some PCI API to allow
- * drivers to override blacklists for pre 1.1 PCIe but for now it is
- * best to accept that both L0s and L1 will be disabled completely for
- * distributions shipping with CONFIG_PCIEASPM rather than having this
- * issue present. Motivation for adding this new API will be to help
- * with power consumption for some of these devices.
- */
- pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S);
+ return ath_reg_notifier_apply(wiphy, request, regulatory);
+}
- ret = pci_enable_device(pdev);
- if (ret) {
- dev_err(&pdev->dev, "can't enable device\n");
- goto err;
- }
+/********************\
+* Channel/mode setup *
+\********************/
- /* XXX 32-bit addressing only */
- ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
- if (ret) {
- dev_err(&pdev->dev, "32-bit DMA not available\n");
- goto err_dis;
- }
+/*
+ * Convert IEEE channel number to MHz frequency.
+ */
+static inline short
+ath5k_ieee2mhz(short chan)
+{
+ if (chan <= 14 || chan >= 27)
+ return ieee80211chan2mhz(chan);
+ else
+ return 2212 + chan * 20;
+}
- /*
- * Cache line size is used to size and align various
- * structures used to communicate with the hardware.
- */
- pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
- if (csz == 0) {
- /*
- * Linux 2.4.18 (at least) writes the cache line size
- * register as a 16-bit wide register which is wrong.
- * We must have this setup properly for rx buffer
- * DMA to work so force a reasonable value here if it
- * comes up zero.
- */
- csz = L1_CACHE_BYTES >> 2;
- pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
- }
- /*
- * The default setting of latency timer yields poor results,
- * set it to the value used by other systems. It may be worth
- * tweaking this setting more.
- */
- pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
+/*
+ * Returns true for the channel numbers used without all_channels modparam.
+ */
+static bool ath5k_is_standard_channel(short chan)
+{
+ return ((chan <= 14) ||
+ /* UNII 1,2 */
+ ((chan & 3) == 0 && chan >= 36 && chan <= 64) ||
+ /* midband */
+ ((chan & 3) == 0 && chan >= 100 && chan <= 140) ||
+ /* UNII-3 */
+ ((chan & 3) == 1 && chan >= 149 && chan <= 165));
+}
- /* Enable bus mastering */
- pci_set_master(pdev);
+static unsigned int
+ath5k_copy_channels(struct ath5k_hw *ah,
+ struct ieee80211_channel *channels,
+ unsigned int mode,
+ unsigned int max)
+{
+ unsigned int i, count, size, chfreq, freq, ch;
- /*
- * Disable the RETRY_TIMEOUT register (0x41) to keep
- * PCI Tx retries from interfering with C3 CPU state.
- */
- pci_write_config_byte(pdev, 0x41, 0);
+ if (!test_bit(mode, ah->ah_modes))
+ return 0;
- ret = pci_request_region(pdev, 0, "ath5k");
- if (ret) {
- dev_err(&pdev->dev, "cannot reserve PCI memory region\n");
- goto err_dis;
+ switch (mode) {
+ case AR5K_MODE_11A:
+ case AR5K_MODE_11A_TURBO:
+ /* 1..220, but 2GHz frequencies are filtered by check_channel */
+ size = 220 ;
+ chfreq = CHANNEL_5GHZ;
+ break;
+ case AR5K_MODE_11B:
+ case AR5K_MODE_11G:
+ case AR5K_MODE_11G_TURBO:
+ size = 26;
+ chfreq = CHANNEL_2GHZ;
+ break;
+ default:
+ ATH5K_WARN(ah->ah_sc, "bad mode, not copying channels\n");
+ return 0;
}
- mem = pci_iomap(pdev, 0, 0);
- if (!mem) {
- dev_err(&pdev->dev, "cannot remap PCI memory region\n") ;
- ret = -EIO;
- goto err_reg;
- }
+ for (i = 0, count = 0; i < size && max > 0; i++) {
+ ch = i + 1 ;
+ freq = ath5k_ieee2mhz(ch);
- /*
- * Allocate hw (mac80211 main struct)
- * and hw->priv (driver private data)
- */
- hw = ieee80211_alloc_hw(sizeof(*sc), &ath5k_hw_ops);
- if (hw == NULL) {
- dev_err(&pdev->dev, "cannot allocate ieee80211_hw\n");
- ret = -ENOMEM;
- goto err_map;
- }
-
- dev_info(&pdev->dev, "registered as '%s'\n", wiphy_name(hw->wiphy));
-
- /* Initialize driver private data */
- SET_IEEE80211_DEV(hw, &pdev->dev);
- hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
- IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
- IEEE80211_HW_SIGNAL_DBM;
+ /* Check if channel is supported by the chipset */
+ if (!ath5k_channel_ok(ah, freq, chfreq))
+ continue;
- hw->wiphy->interface_modes =
- BIT(NL80211_IFTYPE_AP) |
- BIT(NL80211_IFTYPE_STATION) |
- BIT(NL80211_IFTYPE_ADHOC) |
- BIT(NL80211_IFTYPE_MESH_POINT);
+ if (!modparam_all_channels && !ath5k_is_standard_channel(ch))
+ continue;
- hw->extra_tx_headroom = 2;
- hw->channel_change_time = 5000;
- sc = hw->priv;
- sc->hw = hw;
- sc->pdev = pdev;
+ /* Write channel info and increment counter */
+ channels[count].center_freq = freq;
+ channels[count].band = (chfreq == CHANNEL_2GHZ) ?
+ IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
+ switch (mode) {
+ case AR5K_MODE_11A:
+ case AR5K_MODE_11G:
+ channels[count].hw_value = chfreq | CHANNEL_OFDM;
+ break;
+ case AR5K_MODE_11A_TURBO:
+ case AR5K_MODE_11G_TURBO:
+ channels[count].hw_value = chfreq |
+ CHANNEL_OFDM | CHANNEL_TURBO;
+ break;
+ case AR5K_MODE_11B:
+ channels[count].hw_value = CHANNEL_B;
+ }
- ath5k_debug_init_device(sc);
+ count++;
+ max--;
+ }
- /*
- * Mark the device as detached to avoid processing
- * interrupts until setup is complete.
- */
- __set_bit(ATH_STAT_INVALID, sc->status);
+ return count;
+}
- sc->iobase = mem; /* So we can unmap it on detach */
- sc->opmode = NL80211_IFTYPE_STATION;
- sc->bintval = 1000;
- mutex_init(&sc->lock);
- spin_lock_init(&sc->rxbuflock);
- spin_lock_init(&sc->txbuflock);
- spin_lock_init(&sc->block);
+static void
+ath5k_setup_rate_idx(struct ath5k_softc *sc, struct ieee80211_supported_band *b)
+{
+ u8 i;
- /* Set private data */
- pci_set_drvdata(pdev, sc);
+ for (i = 0; i < AR5K_MAX_RATES; i++)
+ sc->rate_idx[b->band][i] = -1;
- /* Setup interrupt handler */
- ret = request_irq(pdev->irq, ath5k_intr, IRQF_SHARED, "ath", sc);
- if (ret) {
- ATH5K_ERR(sc, "request_irq failed\n");
- goto err_free;
+ for (i = 0; i < b->n_bitrates; i++) {
+ sc->rate_idx[b->band][b->bitrates[i].hw_value] = i;
+ if (b->bitrates[i].hw_value_short)
+ sc->rate_idx[b->band][b->bitrates[i].hw_value_short] = i;
}
+}
- /* If we passed the test, malloc an ath5k_hw struct */
- sc->ah = kzalloc(sizeof(struct ath5k_hw), GFP_KERNEL);
- if (!sc->ah) {
- ret = -ENOMEM;
- ATH5K_ERR(sc, "out of memory\n");
- goto err_irq;
- }
+static int
+ath5k_setup_bands(struct ieee80211_hw *hw)
+{
+ struct ath5k_softc *sc = hw->priv;
+ struct ath5k_hw *ah = sc->ah;
+ struct ieee80211_supported_band *sband;
+ int max_c, count_c = 0;
+ int i;
- sc->ah->ah_sc = sc;
- sc->ah->ah_iobase = sc->iobase;
- common = ath5k_hw_common(sc->ah);
- common->ops = &ath5k_common_ops;
- common->ah = sc->ah;
- common->hw = hw;
- common->cachelsz = csz << 2; /* convert to bytes */
+ BUILD_BUG_ON(ARRAY_SIZE(sc->sbands) < IEEE80211_NUM_BANDS);
+ max_c = ARRAY_SIZE(sc->channels);
- /* Initialize device */
- ret = ath5k_hw_attach(sc);
- if (ret) {
- goto err_free_ah;
- }
+ /* 2GHz band */
+ sband = &sc->sbands[IEEE80211_BAND_2GHZ];
+ sband->band = IEEE80211_BAND_2GHZ;
+ sband->bitrates = &sc->rates[IEEE80211_BAND_2GHZ][0];
- /* set up multi-rate retry capabilities */
- if (sc->ah->ah_version == AR5K_AR5212) {
- hw->max_rates = 4;
- hw->max_rate_tries = 11;
- }
+ if (test_bit(AR5K_MODE_11G, sc->ah->ah_capabilities.cap_mode)) {
+ /* G mode */
+ memcpy(sband->bitrates, &ath5k_rates[0],
+ sizeof(struct ieee80211_rate) * 12);
+ sband->n_bitrates = 12;
- /* Finish private driver data initialization */
- ret = ath5k_attach(pdev, hw);
- if (ret)
- goto err_ah;
+ sband->channels = sc->channels;
+ sband->n_channels = ath5k_copy_channels(ah, sband->channels,
+ AR5K_MODE_11G, max_c);
- ATH5K_INFO(sc, "Atheros AR%s chip found (MAC: 0x%x, PHY: 0x%x)\n",
- ath5k_chip_name(AR5K_VERSION_MAC, sc->ah->ah_mac_srev),
- sc->ah->ah_mac_srev,
- sc->ah->ah_phy_revision);
+ hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
+ count_c = sband->n_channels;
+ max_c -= count_c;
+ } else if (test_bit(AR5K_MODE_11B, sc->ah->ah_capabilities.cap_mode)) {
+ /* B mode */
+ memcpy(sband->bitrates, &ath5k_rates[0],
+ sizeof(struct ieee80211_rate) * 4);
+ sband->n_bitrates = 4;
- if (!sc->ah->ah_single_chip) {
- /* Single chip radio (!RF5111) */
- if (sc->ah->ah_radio_5ghz_revision &&
- !sc->ah->ah_radio_2ghz_revision) {
- /* No 5GHz support -> report 2GHz radio */
- if (!test_bit(AR5K_MODE_11A,
- sc->ah->ah_capabilities.cap_mode)) {
- ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n",
- ath5k_chip_name(AR5K_VERSION_RAD,
- sc->ah->ah_radio_5ghz_revision),
- sc->ah->ah_radio_5ghz_revision);
- /* No 2GHz support (5110 and some
- * 5Ghz only cards) -> report 5Ghz radio */
- } else if (!test_bit(AR5K_MODE_11B,
- sc->ah->ah_capabilities.cap_mode)) {
- ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n",
- ath5k_chip_name(AR5K_VERSION_RAD,
- sc->ah->ah_radio_5ghz_revision),
- sc->ah->ah_radio_5ghz_revision);
- /* Multiband radio */
- } else {
- ATH5K_INFO(sc, "RF%s multiband radio found"
- " (0x%x)\n",
- ath5k_chip_name(AR5K_VERSION_RAD,
- sc->ah->ah_radio_5ghz_revision),
- sc->ah->ah_radio_5ghz_revision);
+ /* 5211 only supports B rates and uses 4bit rate codes
+ * (e.g normally we have 0x1B for 1M, but on 5211 we have 0x0B)
+ * fix them up here:
+ */
+ if (ah->ah_version == AR5K_AR5211) {
+ for (i = 0; i < 4; i++) {
+ sband->bitrates[i].hw_value =
+ sband->bitrates[i].hw_value & 0xF;
+ sband->bitrates[i].hw_value_short =
+ sband->bitrates[i].hw_value_short & 0xF;
}
}
- /* Multi chip radio (RF5111 - RF2111) ->
- * report both 2GHz/5GHz radios */
- else if (sc->ah->ah_radio_5ghz_revision &&
- sc->ah->ah_radio_2ghz_revision){
- ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n",
- ath5k_chip_name(AR5K_VERSION_RAD,
- sc->ah->ah_radio_5ghz_revision),
- sc->ah->ah_radio_5ghz_revision);
- ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n",
- ath5k_chip_name(AR5K_VERSION_RAD,
- sc->ah->ah_radio_2ghz_revision),
- sc->ah->ah_radio_2ghz_revision);
- }
- }
+ sband->channels = sc->channels;
+ sband->n_channels = ath5k_copy_channels(ah, sband->channels,
+ AR5K_MODE_11B, max_c);
- /* ready to process interrupts */
- __clear_bit(ATH_STAT_INVALID, sc->status);
+ hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
+ count_c = sband->n_channels;
+ max_c -= count_c;
+ }
+ ath5k_setup_rate_idx(sc, sband);
- return 0;
-err_ah:
- ath5k_hw_detach(sc->ah);
-err_free_ah:
- kfree(sc->ah);
-err_irq:
- free_irq(pdev->irq, sc);
-err_free:
- ieee80211_free_hw(hw);
-err_map:
- pci_iounmap(pdev, mem);
-err_reg:
- pci_release_region(pdev, 0);
-err_dis:
- pci_disable_device(pdev);
-err:
- return ret;
-}
+ /* 5GHz band, A mode */
+ if (test_bit(AR5K_MODE_11A, sc->ah->ah_capabilities.cap_mode)) {
+ sband = &sc->sbands[IEEE80211_BAND_5GHZ];
+ sband->band = IEEE80211_BAND_5GHZ;
+ sband->bitrates = &sc->rates[IEEE80211_BAND_5GHZ][0];
-static void __devexit
-ath5k_pci_remove(struct pci_dev *pdev)
-{
- struct ath5k_softc *sc = pci_get_drvdata(pdev);
+ memcpy(sband->bitrates, &ath5k_rates[4],
+ sizeof(struct ieee80211_rate) * 8);
+ sband->n_bitrates = 8;
- ath5k_debug_finish_device(sc);
- ath5k_detach(pdev, sc->hw);
- ath5k_hw_detach(sc->ah);
- kfree(sc->ah);
- free_irq(pdev->irq, sc);
- pci_iounmap(pdev, sc->iobase);
- pci_release_region(pdev, 0);
- pci_disable_device(pdev);
- ieee80211_free_hw(sc->hw);
-}
+ sband->channels = &sc->channels[count_c];
+ sband->n_channels = ath5k_copy_channels(ah, sband->channels,
+ AR5K_MODE_11A, max_c);
-#ifdef CONFIG_PM_SLEEP
-static int ath5k_pci_suspend(struct device *dev)
-{
- struct ath5k_softc *sc = pci_get_drvdata(to_pci_dev(dev));
+ hw->wiphy->bands[IEEE80211_BAND_5GHZ] = sband;
+ }
+ ath5k_setup_rate_idx(sc, sband);
+
+ ath5k_debug_dump_bands(sc);
- ath5k_led_off(sc);
return 0;
}
-static int ath5k_pci_resume(struct device *dev)
-{
- struct pci_dev *pdev = to_pci_dev(dev);
- struct ath5k_softc *sc = pci_get_drvdata(pdev);
-
+/*
+ * Set/change channels. We always reset the chip.
+ * To accomplish this we must first cleanup any pending DMA,
+ * then restart stuff after a la ath5k_init.
+ *
+ * Called with sc->lock.
+ */
+static int
+ath5k_chan_set(struct ath5k_softc *sc, struct ieee80211_channel *chan)
+{
+ ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
+ "channel set, resetting (%u -> %u MHz)\n",
+ sc->curchan->center_freq, chan->center_freq);
+
/*
- * Suspend/Resume resets the PCI configuration space, so we have to
- * re-disable the RETRY_TIMEOUT register (0x41) to keep
- * PCI Tx retries from interfering with C3 CPU state
+ * To switch channels clear any pending DMA operations;
+ * wait long enough for the RX fifo to drain, reset the
+ * hardware at the new frequency, and then re-enable
+ * the relevant bits of the h/w.
*/
- pci_write_config_byte(pdev, 0x41, 0);
-
- ath5k_led_enable(sc);
- return 0;
+ return ath5k_reset(sc, chan);
}
-#endif /* CONFIG_PM_SLEEP */
-
-
-/***********************\
-* Driver Initialization *
-\***********************/
-static int ath5k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
+static void
+ath5k_setcurmode(struct ath5k_softc *sc, unsigned int mode)
{
- struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
- struct ath5k_softc *sc = hw->priv;
- struct ath_regulatory *regulatory = ath5k_hw_regulatory(sc->ah);
+ sc->curmode = mode;
- return ath_reg_notifier_apply(wiphy, request, regulatory);
+ if (mode == AR5K_MODE_11A) {
+ sc->curband = &sc->sbands[IEEE80211_BAND_5GHZ];
+ } else {
+ sc->curband = &sc->sbands[IEEE80211_BAND_2GHZ];
+ }
}
-static int
-ath5k_attach(struct pci_dev *pdev, struct ieee80211_hw *hw)
+static void
+ath5k_mode_setup(struct ath5k_softc *sc)
{
- struct ath5k_softc *sc = hw->priv;
struct ath5k_hw *ah = sc->ah;
- struct ath_regulatory *regulatory = ath5k_hw_regulatory(ah);
- u8 mac[ETH_ALEN] = {};
- int ret;
+ u32 rfilt;
- ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "devid 0x%x\n", pdev->device);
+ /* configure rx filter */
+ rfilt = sc->filter_flags;
+ ath5k_hw_set_rx_filter(ah, rfilt);
- /*
- * Check if the MAC has multi-rate retry support.
- * We do this by trying to setup a fake extended
- * descriptor. MACs that don't have support will
- * return false w/o doing anything. MACs that do
- * support it will return true w/o doing anything.
- */
- ret = ath5k_hw_setup_mrr_tx_desc(ah, NULL, 0, 0, 0, 0, 0, 0);
+ if (ath5k_hw_hasbssidmask(ah))
+ ath5k_hw_set_bssid_mask(ah, sc->bssidmask);
- if (ret < 0)
- goto err;
- if (ret > 0)
- __set_bit(ATH_STAT_MRRETRY, sc->status);
+ /* configure operational mode */
+ ath5k_hw_set_opmode(ah, sc->opmode);
- /*
- * Collect the channel list. The 802.11 layer
- * is resposible for filtering this list based
- * on settings like the phy mode and regulatory
- * domain restrictions.
- */
- ret = ath5k_setup_bands(hw);
- if (ret) {
- ATH5K_ERR(sc, "can't get channels\n");
- goto err;
- }
+ ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "mode setup opmode %d\n", sc->opmode);
+ ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "RX filter 0x%x\n", rfilt);
+}
- /* NB: setup here so ath5k_rate_update is happy */
- if (test_bit(AR5K_MODE_11A, ah->ah_modes))
- ath5k_setcurmode(sc, AR5K_MODE_11A);
- else
- ath5k_setcurmode(sc, AR5K_MODE_11B);
+static inline int
+ath5k_hw_to_driver_rix(struct ath5k_softc *sc, int hw_rix)
+{
+ int rix;
- /*
- * Allocate tx+rx descriptors and populate the lists.
- */
- ret = ath5k_desc_alloc(sc, pdev);
- if (ret) {
- ATH5K_ERR(sc, "can't allocate descriptors\n");
- goto err;
- }
+ /* return base rate on errors */
+ if (WARN(hw_rix < 0 || hw_rix >= AR5K_MAX_RATES,
+ "hw_rix out of bounds: %x\n", hw_rix))
+ return 0;
+
+ rix = sc->rate_idx[sc->curband->band][hw_rix];
+ if (WARN(rix < 0, "invalid hw_rix: %x\n", hw_rix))
+ rix = 0;
+
+ return rix;
+}
+
+/***************\
+* Buffers setup *
+\***************/
+
+static
+struct sk_buff *ath5k_rx_skb_alloc(struct ath5k_softc *sc, dma_addr_t *skb_addr)
+{
+ struct ath_common *common = ath5k_hw_common(sc->ah);
+ struct sk_buff *skb;
/*
- * Allocate hardware transmit queues: one queue for
- * beacon frames and one data queue for each QoS
- * priority. Note that hw functions handle resetting
- * these queues at the needed time.
+ * Allocate buffer with headroom_needed space for the
+ * fake physical layer header at the start.
*/
- ret = ath5k_beaconq_setup(ah);
- if (ret < 0) {
- ATH5K_ERR(sc, "can't setup a beacon xmit queue\n");
- goto err_desc;
- }
- sc->bhalq = ret;
- sc->cabq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_CAB, 0);
- if (IS_ERR(sc->cabq)) {
- ATH5K_ERR(sc, "can't setup cab queue\n");
- ret = PTR_ERR(sc->cabq);
- goto err_bhal;
- }
+ skb = ath_rxbuf_alloc(common,
+ common->rx_bufsize,
+ GFP_ATOMIC);
- sc->txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BK);
- if (IS_ERR(sc->txq)) {
- ATH5K_ERR(sc, "can't setup xmit queue\n");
- ret = PTR_ERR(sc->txq);
- goto err_queues;
+ if (!skb) {
+ ATH5K_ERR(sc, "can't alloc skbuff of size %u\n",
+ common->rx_bufsize);
+ return NULL;
}
- tasklet_init(&sc->rxtq, ath5k_tasklet_rx, (unsigned long)sc);
- tasklet_init(&sc->txtq, ath5k_tasklet_tx, (unsigned long)sc);
- tasklet_init(&sc->calib, ath5k_tasklet_calibrate, (unsigned long)sc);
- tasklet_init(&sc->beacontq, ath5k_tasklet_beacon, (unsigned long)sc);
- tasklet_init(&sc->ani_tasklet, ath5k_tasklet_ani, (unsigned long)sc);
-
- INIT_WORK(&sc->reset_work, ath5k_reset_work);
-
- ret = ath5k_eeprom_read_mac(ah, mac);
- if (ret) {
- ATH5K_ERR(sc, "unable to read address from EEPROM: 0x%04x\n",
- sc->pdev->device);
- goto err_queues;
+ *skb_addr = pci_map_single(sc->pdev,
+ skb->data, common->rx_bufsize,
+ PCI_DMA_FROMDEVICE);
+ if (unlikely(pci_dma_mapping_error(sc->pdev, *skb_addr))) {
+ ATH5K_ERR(sc, "%s: DMA mapping failed\n", __func__);
+ dev_kfree_skb(skb);
+ return NULL;
}
+ return skb;
+}
- SET_IEEE80211_PERM_ADDR(hw, mac);
- /* All MAC address bits matter for ACKs */
- memcpy(sc->bssidmask, ath_bcast_mac, ETH_ALEN);
- ath5k_hw_set_bssid_mask(sc->ah, sc->bssidmask);
+static int
+ath5k_rxbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
+{
+ struct ath5k_hw *ah = sc->ah;
+ struct sk_buff *skb = bf->skb;
+ struct ath5k_desc *ds;
+ int ret;
- regulatory->current_rd = ah->ah_capabilities.cap_eeprom.ee_regdomain;
- ret = ath_regd_init(regulatory, hw->wiphy, ath5k_reg_notifier);
- if (ret) {
- ATH5K_ERR(sc, "can't initialize regulatory system\n");
- goto err_queues;
+ if (!skb) {
+ skb = ath5k_rx_skb_alloc(sc, &bf->skbaddr);
+ if (!skb)
+ return -ENOMEM;
+ bf->skb = skb;
}
- ret = ieee80211_register_hw(hw);
+ /*
+ * Setup descriptors. For receive we always terminate
+ * the descriptor list with a self-linked entry so we'll
+ * not get overrun under high load (as can happen with a
+ * 5212 when ANI processing enables PHY error frames).
+ *
+ * To ensure the last descriptor is self-linked we create
+ * each descriptor as self-linked and add it to the end. As
+ * each additional descriptor is added the previous self-linked
+ * entry is "fixed" naturally. This should be safe even
+ * if DMA is happening. When processing RX interrupts we
+ * never remove/process the last, self-linked, entry on the
+ * descriptor list. This ensures the hardware always has
+ * someplace to write a new frame.
+ */
+ ds = bf->desc;
+ ds->ds_link = bf->daddr; /* link to self */
+ ds->ds_data = bf->skbaddr;
+ ret = ath5k_hw_setup_rx_desc(ah, ds, ah->common.rx_bufsize, 0);
if (ret) {
- ATH5K_ERR(sc, "can't register ieee80211 hw\n");
- goto err_queues;
+ ATH5K_ERR(sc, "%s: could not setup RX desc\n", __func__);
+ return ret;
}
- if (!ath_is_world_regd(regulatory))
- regulatory_hint(hw->wiphy, regulatory->alpha2);
-
- ath5k_init_leds(sc);
-
- ath5k_sysfs_register(sc);
-
+ if (sc->rxlink != NULL)
+ *sc->rxlink = bf->daddr;
+ sc->rxlink = &ds->ds_link;
return 0;
-err_queues:
- ath5k_txq_release(sc);
-err_bhal:
- ath5k_hw_release_tx_queue(ah, sc->bhalq);
-err_desc:
- ath5k_desc_free(sc, pdev);
-err:
- return ret;
}
-static void
-ath5k_detach(struct pci_dev *pdev, struct ieee80211_hw *hw)
+static enum ath5k_pkt_type get_hw_packet_type(struct sk_buff *skb)
{
- struct ath5k_softc *sc = hw->priv;
+ struct ieee80211_hdr *hdr;
+ enum ath5k_pkt_type htype;
+ __le16 fc;
- /*
- * NB: the order of these is important:
- * o call the 802.11 layer before detaching ath5k_hw to
- * ensure callbacks into the driver to delete global
- * key cache entries can be handled
- * o reclaim the tx queue data structures after calling
- * the 802.11 layer as we'll get called back to reclaim
- * node state and potentially want to use them
- * o to cleanup the tx queues the hal is called, so detach
- * it last
- * XXX: ??? detach ath5k_hw ???
- * Other than that, it's straightforward...
- */
- ieee80211_unregister_hw(hw);
- ath5k_desc_free(sc, pdev);
- ath5k_txq_release(sc);
- ath5k_hw_release_tx_queue(sc->ah, sc->bhalq);
- ath5k_unregister_leds(sc);
-
- ath5k_sysfs_unregister(sc);
- /*
- * NB: can't reclaim these until after ieee80211_ifdetach
- * returns because we'll get called back to reclaim node
- * state and potentially want to use them.
- */
-}
-
-
-
-
-/********************\
-* Channel/mode setup *
-\********************/
+ hdr = (struct ieee80211_hdr *)skb->data;
+ fc = hdr->frame_control;
-/*
- * Convert IEEE channel number to MHz frequency.
- */
-static inline short
-ath5k_ieee2mhz(short chan)
-{
- if (chan <= 14 || chan >= 27)
- return ieee80211chan2mhz(chan);
+ if (ieee80211_is_beacon(fc))
+ htype = AR5K_PKT_TYPE_BEACON;
+ else if (ieee80211_is_probe_resp(fc))
+ htype = AR5K_PKT_TYPE_PROBE_RESP;
+ else if (ieee80211_is_atim(fc))
+ htype = AR5K_PKT_TYPE_ATIM;
+ else if (ieee80211_is_pspoll(fc))
+ htype = AR5K_PKT_TYPE_PSPOLL;
else
- return 2212 + chan * 20;
-}
+ htype = AR5K_PKT_TYPE_NORMAL;
-/*
- * Returns true for the channel numbers used without all_channels modparam.
- */
-static bool ath5k_is_standard_channel(short chan)
-{
- return ((chan <= 14) ||
- /* UNII 1,2 */
- ((chan & 3) == 0 && chan >= 36 && chan <= 64) ||
- /* midband */
- ((chan & 3) == 0 && chan >= 100 && chan <= 140) ||
- /* UNII-3 */
- ((chan & 3) == 1 && chan >= 149 && chan <= 165));
+ return htype;
}
-static unsigned int
-ath5k_copy_channels(struct ath5k_hw *ah,
- struct ieee80211_channel *channels,
- unsigned int mode,
- unsigned int max)
+static int
+ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf,
+ struct ath5k_txq *txq, int padsize)
{
- unsigned int i, count, size, chfreq, freq, ch;
+ struct ath5k_hw *ah = sc->ah;
+ struct ath5k_desc *ds = bf->desc;
+ struct sk_buff *skb = bf->skb;
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ unsigned int pktlen, flags, keyidx = AR5K_TXKEYIX_INVALID;
+ struct ieee80211_rate *rate;
+ unsigned int mrr_rate[3], mrr_tries[3];
+ int i, ret;
+ u16 hw_rate;
+ u16 cts_rate = 0;
+ u16 duration = 0;
+ u8 rc_flags;
- if (!test_bit(mode, ah->ah_modes))
- return 0;
+ flags = AR5K_TXDESC_INTREQ | AR5K_TXDESC_CLRDMASK;
- switch (mode) {
- case AR5K_MODE_11A:
- case AR5K_MODE_11A_TURBO:
- /* 1..220, but 2GHz frequencies are filtered by check_channel */
- size = 220 ;
- chfreq = CHANNEL_5GHZ;
- break;
- case AR5K_MODE_11B:
- case AR5K_MODE_11G:
- case AR5K_MODE_11G_TURBO:
- size = 26;
- chfreq = CHANNEL_2GHZ;
- break;
- default:
- ATH5K_WARN(ah->ah_sc, "bad mode, not copying channels\n");
- return 0;
- }
+ /* XXX endianness */
+ bf->skbaddr = pci_map_single(sc->pdev, skb->data, skb->len,
+ PCI_DMA_TODEVICE);
- for (i = 0, count = 0; i < size && max > 0; i++) {
- ch = i + 1 ;
- freq = ath5k_ieee2mhz(ch);
+ rate = ieee80211_get_tx_rate(sc->hw, info);
- /* Check if channel is supported by the chipset */
- if (!ath5k_channel_ok(ah, freq, chfreq))
- continue;
+ if (info->flags & IEEE80211_TX_CTL_NO_ACK)
+ flags |= AR5K_TXDESC_NOACK;
- if (!modparam_all_channels && !ath5k_is_standard_channel(ch))
- continue;
+ rc_flags = info->control.rates[0].flags;
+ hw_rate = (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) ?
+ rate->hw_value_short : rate->hw_value;
- /* Write channel info and increment counter */
- channels[count].center_freq = freq;
- channels[count].band = (chfreq == CHANNEL_2GHZ) ?
- IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
- switch (mode) {
- case AR5K_MODE_11A:
- case AR5K_MODE_11G:
- channels[count].hw_value = chfreq | CHANNEL_OFDM;
- break;
- case AR5K_MODE_11A_TURBO:
- case AR5K_MODE_11G_TURBO:
- channels[count].hw_value = chfreq |
- CHANNEL_OFDM | CHANNEL_TURBO;
+ pktlen = skb->len;
+
+ /* FIXME: If we are in g mode and rate is a CCK rate
+ * subtract ah->ah_txpower.txp_cck_ofdm_pwr_delta
+ * from tx power (value is in dB units already) */
+ if (info->control.hw_key) {
+ keyidx = info->control.hw_key->hw_key_idx;
+ pktlen += info->control.hw_key->icv_len;
+ }
+ if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
+ flags |= AR5K_TXDESC_RTSENA;
+ cts_rate = ieee80211_get_rts_cts_rate(sc->hw, info)->hw_value;
+ duration = le16_to_cpu(ieee80211_rts_duration(sc->hw,
+ sc->vif, pktlen, info));
+ }
+ if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
+ flags |= AR5K_TXDESC_CTSENA;
+ cts_rate = ieee80211_get_rts_cts_rate(sc->hw, info)->hw_value;
+ duration = le16_to_cpu(ieee80211_ctstoself_duration(sc->hw,
+ sc->vif, pktlen, info));
+ }
+ ret = ah->ah_setup_tx_desc(ah, ds, pktlen,
+ ieee80211_get_hdrlen_from_skb(skb), padsize,
+ get_hw_packet_type(skb),
+ (sc->power_level * 2),
+ hw_rate,
+ info->control.rates[0].count, keyidx, ah->ah_tx_ant, flags,
+ cts_rate, duration);
+ if (ret)
+ goto err_unmap;
+
+ memset(mrr_rate, 0, sizeof(mrr_rate));
+ memset(mrr_tries, 0, sizeof(mrr_tries));
+ for (i = 0; i < 3; i++) {
+ rate = ieee80211_get_alt_retry_rate(sc->hw, info, i);
+ if (!rate)
break;
- case AR5K_MODE_11B:
- channels[count].hw_value = CHANNEL_B;
- }
- count++;
- max--;
+ mrr_rate[i] = rate->hw_value;
+ mrr_tries[i] = info->control.rates[i + 1].count;
}
- return count;
-}
+ ath5k_hw_setup_mrr_tx_desc(ah, ds,
+ mrr_rate[0], mrr_tries[0],
+ mrr_rate[1], mrr_tries[1],
+ mrr_rate[2], mrr_tries[2]);
-static void
-ath5k_setup_rate_idx(struct ath5k_softc *sc, struct ieee80211_supported_band *b)
-{
- u8 i;
+ ds->ds_link = 0;
+ ds->ds_data = bf->skbaddr;
- for (i = 0; i < AR5K_MAX_RATES; i++)
- sc->rate_idx[b->band][i] = -1;
+ spin_lock_bh(&txq->lock);
+ list_add_tail(&bf->list, &txq->q);
+ if (txq->link == NULL) /* is this first packet? */
+ ath5k_hw_set_txdp(ah, txq->qnum, bf->daddr);
+ else /* no, so only link it */
+ *txq->link = bf->daddr;
- for (i = 0; i < b->n_bitrates; i++) {
- sc->rate_idx[b->band][b->bitrates[i].hw_value] = i;
- if (b->bitrates[i].hw_value_short)
- sc->rate_idx[b->band][b->bitrates[i].hw_value_short] = i;
- }
+ txq->link = &ds->ds_link;
+ ath5k_hw_start_tx_dma(ah, txq->qnum);
+ mmiowb();
+ spin_unlock_bh(&txq->lock);
+
+ return 0;
+err_unmap:
+ pci_unmap_single(sc->pdev, bf->skbaddr, skb->len, PCI_DMA_TODEVICE);
+ return ret;
}
+/*******************\
+* Descriptors setup *
+\*******************/
+
static int
-ath5k_setup_bands(struct ieee80211_hw *hw)
+ath5k_desc_alloc(struct ath5k_softc *sc, struct pci_dev *pdev)
{
- struct ath5k_softc *sc = hw->priv;
- struct ath5k_hw *ah = sc->ah;
- struct ieee80211_supported_band *sband;
- int max_c, count_c = 0;
- int i;
-
- BUILD_BUG_ON(ARRAY_SIZE(sc->sbands) < IEEE80211_NUM_BANDS);
- max_c = ARRAY_SIZE(sc->channels);
+ struct ath5k_desc *ds;
+ struct ath5k_buf *bf;
+ dma_addr_t da;
+ unsigned int i;
+ int ret;
- /* 2GHz band */
- sband = &sc->sbands[IEEE80211_BAND_2GHZ];
- sband->band = IEEE80211_BAND_2GHZ;
- sband->bitrates = &sc->rates[IEEE80211_BAND_2GHZ][0];
+ /* allocate descriptors */
+ sc->desc_len = sizeof(struct ath5k_desc) *
+ (ATH_TXBUF + ATH_RXBUF + ATH_BCBUF + 1);
+ sc->desc = pci_alloc_consistent(pdev, sc->desc_len, &sc->desc_daddr);
+ if (sc->desc == NULL) {
+ ATH5K_ERR(sc, "can't allocate descriptors\n");
+ ret = -ENOMEM;
+ goto err;
+ }
+ ds = sc->desc;
+ da = sc->desc_daddr;
+ ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "DMA map: %p (%zu) -> %llx\n",
+ ds, sc->desc_len, (unsigned long long)sc->desc_daddr);
- if (test_bit(AR5K_MODE_11G, sc->ah->ah_capabilities.cap_mode)) {
- /* G mode */
- memcpy(sband->bitrates, &ath5k_rates[0],
- sizeof(struct ieee80211_rate) * 12);
- sband->n_bitrates = 12;
+ bf = kcalloc(1 + ATH_TXBUF + ATH_RXBUF + ATH_BCBUF,
+ sizeof(struct ath5k_buf), GFP_KERNEL);
+ if (bf == NULL) {
+ ATH5K_ERR(sc, "can't allocate bufptr\n");
+ ret = -ENOMEM;
+ goto err_free;
+ }
+ sc->bufptr = bf;
- sband->channels = sc->channels;
- sband->n_channels = ath5k_copy_channels(ah, sband->channels,
- AR5K_MODE_11G, max_c);
-
- hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
- count_c = sband->n_channels;
- max_c -= count_c;
- } else if (test_bit(AR5K_MODE_11B, sc->ah->ah_capabilities.cap_mode)) {
- /* B mode */
- memcpy(sband->bitrates, &ath5k_rates[0],
- sizeof(struct ieee80211_rate) * 4);
- sband->n_bitrates = 4;
-
- /* 5211 only supports B rates and uses 4bit rate codes
- * (e.g normally we have 0x1B for 1M, but on 5211 we have 0x0B)
- * fix them up here:
- */
- if (ah->ah_version == AR5K_AR5211) {
- for (i = 0; i < 4; i++) {
- sband->bitrates[i].hw_value =
- sband->bitrates[i].hw_value & 0xF;
- sband->bitrates[i].hw_value_short =
- sband->bitrates[i].hw_value_short & 0xF;
- }
- }
-
- sband->channels = sc->channels;
- sband->n_channels = ath5k_copy_channels(ah, sband->channels,
- AR5K_MODE_11B, max_c);
+ INIT_LIST_HEAD(&sc->rxbuf);
+ for (i = 0; i < ATH_RXBUF; i++, bf++, ds++, da += sizeof(*ds)) {
+ bf->desc = ds;
+ bf->daddr = da;
+ list_add_tail(&bf->list, &sc->rxbuf);
+ }
- hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
- count_c = sband->n_channels;
- max_c -= count_c;
+ INIT_LIST_HEAD(&sc->txbuf);
+ sc->txbuf_len = ATH_TXBUF;
+ for (i = 0; i < ATH_TXBUF; i++, bf++, ds++,
+ da += sizeof(*ds)) {
+ bf->desc = ds;
+ bf->daddr = da;
+ list_add_tail(&bf->list, &sc->txbuf);
}
- ath5k_setup_rate_idx(sc, sband);
- /* 5GHz band, A mode */
- if (test_bit(AR5K_MODE_11A, sc->ah->ah_capabilities.cap_mode)) {
- sband = &sc->sbands[IEEE80211_BAND_5GHZ];
- sband->band = IEEE80211_BAND_5GHZ;
- sband->bitrates = &sc->rates[IEEE80211_BAND_5GHZ][0];
+ /* beacon buffer */
+ bf->desc = ds;
+ bf->daddr = da;
+ sc->bbuf = bf;
- memcpy(sband->bitrates, &ath5k_rates[4],
- sizeof(struct ieee80211_rate) * 8);
- sband->n_bitrates = 8;
+ return 0;
+err_free:
+ pci_free_consistent(pdev, sc->desc_len, sc->desc, sc->desc_daddr);
+err:
+ sc->desc = NULL;
+ return ret;
+}
- sband->channels = &sc->channels[count_c];
- sband->n_channels = ath5k_copy_channels(ah, sband->channels,
- AR5K_MODE_11A, max_c);
+static void
+ath5k_desc_free(struct ath5k_softc *sc, struct pci_dev *pdev)
+{
+ struct ath5k_buf *bf;
- hw->wiphy->bands[IEEE80211_BAND_5GHZ] = sband;
- }
- ath5k_setup_rate_idx(sc, sband);
+ ath5k_txbuf_free_skb(sc, sc->bbuf);
+ list_for_each_entry(bf, &sc->txbuf, list)
+ ath5k_txbuf_free_skb(sc, bf);
+ list_for_each_entry(bf, &sc->rxbuf, list)
+ ath5k_rxbuf_free_skb(sc, bf);
- ath5k_debug_dump_bands(sc);
+ /* Free memory associated with all descriptors */
+ pci_free_consistent(pdev, sc->desc_len, sc->desc, sc->desc_daddr);
+ sc->desc = NULL;
+ sc->desc_daddr = 0;
- return 0;
+ kfree(sc->bufptr);
+ sc->bufptr = NULL;
+ sc->bbuf = NULL;
}
-/*
- * Set/change channels. We always reset the chip.
- * To accomplish this we must first cleanup any pending DMA,
- * then restart stuff after a la ath5k_init.
- *
- * Called with sc->lock.
- */
-static int
-ath5k_chan_set(struct ath5k_softc *sc, struct ieee80211_channel *chan)
+
+/**************\
+* Queues setup *
+\**************/
+
+static struct ath5k_txq *
+ath5k_txq_setup(struct ath5k_softc *sc,
+ int qtype, int subtype)
{
- ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
- "channel set, resetting (%u -> %u MHz)\n",
- sc->curchan->center_freq, chan->center_freq);
+ struct ath5k_hw *ah = sc->ah;
+ struct ath5k_txq *txq;
+ struct ath5k_txq_info qi = {
+ .tqi_subtype = subtype,
+ .tqi_aifs = AR5K_TXQ_USEDEFAULT,
+ .tqi_cw_min = AR5K_TXQ_USEDEFAULT,
+ .tqi_cw_max = AR5K_TXQ_USEDEFAULT
+ };
+ int qnum;
/*
- * To switch channels clear any pending DMA operations;
- * wait long enough for the RX fifo to drain, reset the
- * hardware at the new frequency, and then re-enable
- * the relevant bits of the h/w.
+ * Enable interrupts only for EOL and DESC conditions.
+ * We mark tx descriptors to receive a DESC interrupt
+ * when a tx queue gets deep; otherwise we wait for the
+ * EOL to reap descriptors. Note that this is done to
+ * reduce interrupt load and this only defers reaping
+ * descriptors, never transmitting frames. Aside from
+ * reducing interrupts this also permits more concurrency.
+ * The only potential downside is if the tx queue backs
+ * up in which case the top half of the kernel may backup
+ * due to a lack of tx descriptors.
*/
- return ath5k_reset(sc, chan);
+ qi.tqi_flags = AR5K_TXQ_FLAG_TXEOLINT_ENABLE |
+ AR5K_TXQ_FLAG_TXDESCINT_ENABLE;
+ qnum = ath5k_hw_setup_tx_queue(ah, qtype, &qi);
+ if (qnum < 0) {
+ /*
+ * NB: don't print a message, this happens
+ * normally on parts with too few tx queues
+ */
+ return ERR_PTR(qnum);
+ }
+ if (qnum >= ARRAY_SIZE(sc->txqs)) {
+ ATH5K_ERR(sc, "hw qnum %u out of range, max %tu!\n",
+ qnum, ARRAY_SIZE(sc->txqs));
+ ath5k_hw_release_tx_queue(ah, qnum);
+ return ERR_PTR(-EINVAL);
+ }
+ txq = &sc->txqs[qnum];
+ if (!txq->setup) {
+ txq->qnum = qnum;
+ txq->link = NULL;
+ INIT_LIST_HEAD(&txq->q);
+ spin_lock_init(&txq->lock);
+ txq->setup = true;
+ }
+ return &sc->txqs[qnum];
}
-static void
-ath5k_setcurmode(struct ath5k_softc *sc, unsigned int mode)
+static int
+ath5k_beaconq_setup(struct ath5k_hw *ah)
{
- sc->curmode = mode;
+ struct ath5k_txq_info qi = {
+ .tqi_aifs = AR5K_TXQ_USEDEFAULT,
+ .tqi_cw_min = AR5K_TXQ_USEDEFAULT,
+ .tqi_cw_max = AR5K_TXQ_USEDEFAULT,
+ /* NB: for dynamic turbo, don't enable any other interrupts */
+ .tqi_flags = AR5K_TXQ_FLAG_TXDESCINT_ENABLE
+ };
- if (mode == AR5K_MODE_11A) {
- sc->curband = &sc->sbands[IEEE80211_BAND_5GHZ];
- } else {
- sc->curband = &sc->sbands[IEEE80211_BAND_2GHZ];
- }
+ return ath5k_hw_setup_tx_queue(ah, AR5K_TX_QUEUE_BEACON, &qi);
}
-static void
-ath5k_mode_setup(struct ath5k_softc *sc)
+static int
+ath5k_beaconq_config(struct ath5k_softc *sc)
{
struct ath5k_hw *ah = sc->ah;
- u32 rfilt;
-
- /* configure rx filter */
- rfilt = sc->filter_flags;
- ath5k_hw_set_rx_filter(ah, rfilt);
+ struct ath5k_txq_info qi;
+ int ret;
- if (ath5k_hw_hasbssidmask(ah))
- ath5k_hw_set_bssid_mask(ah, sc->bssidmask);
+ ret = ath5k_hw_get_tx_queueprops(ah, sc->bhalq, &qi);
+ if (ret)
+ goto err;
- /* configure operational mode */
- ath5k_hw_set_opmode(ah, sc->opmode);
+ if (sc->opmode == NL80211_IFTYPE_AP ||
+ sc->opmode == NL80211_IFTYPE_MESH_POINT) {
+ /*
+ * Always burst out beacon and CAB traffic
+ * (aifs = cwmin = cwmax = 0)
+ */
+ qi.tqi_aifs = 0;
+ qi.tqi_cw_min = 0;
+ qi.tqi_cw_max = 0;
+ } else if (sc->opmode == NL80211_IFTYPE_ADHOC) {
+ /*
+ * Adhoc mode; backoff between 0 and (2 * cw_min).
+ */
+ qi.tqi_aifs = 0;
+ qi.tqi_cw_min = 0;
+ qi.tqi_cw_max = 2 * ah->ah_cw_min;
+ }
- ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "mode setup opmode %d\n", sc->opmode);
- ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "RX filter 0x%x\n", rfilt);
-}
+ ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
+ "beacon queueprops tqi_aifs:%d tqi_cw_min:%d tqi_cw_max:%d\n",
+ qi.tqi_aifs, qi.tqi_cw_min, qi.tqi_cw_max);
-static inline int
-ath5k_hw_to_driver_rix(struct ath5k_softc *sc, int hw_rix)
-{
- int rix;
+ ret = ath5k_hw_set_tx_queueprops(ah, sc->bhalq, &qi);
+ if (ret) {
+ ATH5K_ERR(sc, "%s: unable to update parameters for beacon "
+ "hardware queue!\n", __func__);
+ goto err;
+ }
+ ret = ath5k_hw_reset_tx_queue(ah, sc->bhalq); /* push to h/w */
+ if (ret)
+ goto err;
- /* return base rate on errors */
- if (WARN(hw_rix < 0 || hw_rix >= AR5K_MAX_RATES,
- "hw_rix out of bounds: %x\n", hw_rix))
- return 0;
+ /* reconfigure cabq with ready time to 80% of beacon_interval */
+ ret = ath5k_hw_get_tx_queueprops(ah, AR5K_TX_QUEUE_ID_CAB, &qi);
+ if (ret)
+ goto err;
- rix = sc->rate_idx[sc->curband->band][hw_rix];
- if (WARN(rix < 0, "invalid hw_rix: %x\n", hw_rix))
- rix = 0;
+ qi.tqi_ready_time = (sc->bintval * 80) / 100;
+ ret = ath5k_hw_set_tx_queueprops(ah, AR5K_TX_QUEUE_ID_CAB, &qi);
+ if (ret)
+ goto err;
- return rix;
+ ret = ath5k_hw_reset_tx_queue(ah, AR5K_TX_QUEUE_ID_CAB);
+err:
+ return ret;
}
-/***************\
-* Buffers setup *
-\***************/
-
-static
-struct sk_buff *ath5k_rx_skb_alloc(struct ath5k_softc *sc, dma_addr_t *skb_addr)
-{
- struct ath_common *common = ath5k_hw_common(sc->ah);
- struct sk_buff *skb;
+static void
+ath5k_txq_drainq(struct ath5k_softc *sc, struct ath5k_txq *txq)
+{
+ struct ath5k_buf *bf, *bf0;
/*
- * Allocate buffer with headroom_needed space for the
- * fake physical layer header at the start.
+ * NB: this assumes output has been stopped and
+ * we do not need to block ath5k_tx_tasklet
*/
- skb = ath_rxbuf_alloc(common,
- common->rx_bufsize,
- GFP_ATOMIC);
+ spin_lock_bh(&txq->lock);
+ list_for_each_entry_safe(bf, bf0, &txq->q, list) {
+ ath5k_debug_printtxbuf(sc, bf);
- if (!skb) {
- ATH5K_ERR(sc, "can't alloc skbuff of size %u\n",
- common->rx_bufsize);
- return NULL;
- }
+ ath5k_txbuf_free_skb(sc, bf);
- *skb_addr = pci_map_single(sc->pdev,
- skb->data, common->rx_bufsize,
- PCI_DMA_FROMDEVICE);
- if (unlikely(pci_dma_mapping_error(sc->pdev, *skb_addr))) {
- ATH5K_ERR(sc, "%s: DMA mapping failed\n", __func__);
- dev_kfree_skb(skb);
- return NULL;
+ spin_lock_bh(&sc->txbuflock);
+ list_move_tail(&bf->list, &sc->txbuf);
+ sc->txbuf_len++;
+ spin_unlock_bh(&sc->txbuflock);
}
- return skb;
+ txq->link = NULL;
+ spin_unlock_bh(&txq->lock);
}
-static int
-ath5k_rxbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
+/*
+ * Drain the transmit queues and reclaim resources.
+ */
+static void
+ath5k_txq_cleanup(struct ath5k_softc *sc)
{
struct ath5k_hw *ah = sc->ah;
- struct sk_buff *skb = bf->skb;
- struct ath5k_desc *ds;
- int ret;
-
- if (!skb) {
- skb = ath5k_rx_skb_alloc(sc, &bf->skbaddr);
- if (!skb)
- return -ENOMEM;
- bf->skb = skb;
- }
+ unsigned int i;
- /*
- * Setup descriptors. For receive we always terminate
- * the descriptor list with a self-linked entry so we'll
- * not get overrun under high load (as can happen with a
- * 5212 when ANI processing enables PHY error frames).
- *
- * To ensure the last descriptor is self-linked we create
- * each descriptor as self-linked and add it to the end. As
- * each additional descriptor is added the previous self-linked
- * entry is "fixed" naturally. This should be safe even
- * if DMA is happening. When processing RX interrupts we
- * never remove/process the last, self-linked, entry on the
- * descriptor list. This ensures the hardware always has
- * someplace to write a new frame.
- */
- ds = bf->desc;
- ds->ds_link = bf->daddr; /* link to self */
- ds->ds_data = bf->skbaddr;
- ret = ath5k_hw_setup_rx_desc(ah, ds, ah->common.rx_bufsize, 0);
- if (ret) {
- ATH5K_ERR(sc, "%s: could not setup RX desc\n", __func__);
- return ret;
+ /* XXX return value */
+ if (likely(!test_bit(ATH_STAT_INVALID, sc->status))) {
+ /* don't touch the hardware if marked invalid */
+ ath5k_hw_stop_tx_dma(ah, sc->bhalq);
+ ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "beacon queue %x\n",
+ ath5k_hw_get_txdp(ah, sc->bhalq));
+ for (i = 0; i < ARRAY_SIZE(sc->txqs); i++)
+ if (sc->txqs[i].setup) {
+ ath5k_hw_stop_tx_dma(ah, sc->txqs[i].qnum);
+ ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "txq [%u] %x, "
+ "link %p\n",
+ sc->txqs[i].qnum,
+ ath5k_hw_get_txdp(ah,
+ sc->txqs[i].qnum),
+ sc->txqs[i].link);
+ }
}
- if (sc->rxlink != NULL)
- *sc->rxlink = bf->daddr;
- sc->rxlink = &ds->ds_link;
- return 0;
+ for (i = 0; i < ARRAY_SIZE(sc->txqs); i++)
+ if (sc->txqs[i].setup)
+ ath5k_txq_drainq(sc, &sc->txqs[i]);
}
-static enum ath5k_pkt_type get_hw_packet_type(struct sk_buff *skb)
+static void
+ath5k_txq_release(struct ath5k_softc *sc)
{
- struct ieee80211_hdr *hdr;
- enum ath5k_pkt_type htype;
- __le16 fc;
+ struct ath5k_txq *txq = sc->txqs;
+ unsigned int i;
- hdr = (struct ieee80211_hdr *)skb->data;
- fc = hdr->frame_control;
+ for (i = 0; i < ARRAY_SIZE(sc->txqs); i++, txq++)
+ if (txq->setup) {
+ ath5k_hw_release_tx_queue(sc->ah, txq->qnum);
+ txq->setup = false;
+ }
+}
- if (ieee80211_is_beacon(fc))
- htype = AR5K_PKT_TYPE_BEACON;
- else if (ieee80211_is_probe_resp(fc))
- htype = AR5K_PKT_TYPE_PROBE_RESP;
- else if (ieee80211_is_atim(fc))
- htype = AR5K_PKT_TYPE_ATIM;
- else if (ieee80211_is_pspoll(fc))
- htype = AR5K_PKT_TYPE_PSPOLL;
- else
- htype = AR5K_PKT_TYPE_NORMAL;
- return htype;
-}
+/*************\
+* RX Handling *
+\*************/
+/*
+ * Enable the receive h/w following a reset.
+ */
static int
-ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf,
- struct ath5k_txq *txq, int padsize)
+ath5k_rx_start(struct ath5k_softc *sc)
{
struct ath5k_hw *ah = sc->ah;
- struct ath5k_desc *ds = bf->desc;
- struct sk_buff *skb = bf->skb;
- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
- unsigned int pktlen, flags, keyidx = AR5K_TXKEYIX_INVALID;
- struct ieee80211_rate *rate;
- unsigned int mrr_rate[3], mrr_tries[3];
- int i, ret;
- u16 hw_rate;
- u16 cts_rate = 0;
- u16 duration = 0;
- u8 rc_flags;
-
- flags = AR5K_TXDESC_INTREQ | AR5K_TXDESC_CLRDMASK;
-
- /* XXX endianness */
- bf->skbaddr = pci_map_single(sc->pdev, skb->data, skb->len,
- PCI_DMA_TODEVICE);
-
- rate = ieee80211_get_tx_rate(sc->hw, info);
-
- if (info->flags & IEEE80211_TX_CTL_NO_ACK)
- flags |= AR5K_TXDESC_NOACK;
-
- rc_flags = info->control.rates[0].flags;
- hw_rate = (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) ?
- rate->hw_value_short : rate->hw_value;
-
- pktlen = skb->len;
+ struct ath_common *common = ath5k_hw_common(ah);
+ struct ath5k_buf *bf;
+ int ret;
- /* FIXME: If we are in g mode and rate is a CCK rate
- * subtract ah->ah_txpower.txp_cck_ofdm_pwr_delta
- * from tx power (value is in dB units already) */
- if (info->control.hw_key) {
- keyidx = info->control.hw_key->hw_key_idx;
- pktlen += info->control.hw_key->icv_len;
- }
- if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
- flags |= AR5K_TXDESC_RTSENA;
- cts_rate = ieee80211_get_rts_cts_rate(sc->hw, info)->hw_value;
- duration = le16_to_cpu(ieee80211_rts_duration(sc->hw,
- sc->vif, pktlen, info));
- }
- if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
- flags |= AR5K_TXDESC_CTSENA;
- cts_rate = ieee80211_get_rts_cts_rate(sc->hw, info)->hw_value;
- duration = le16_to_cpu(ieee80211_ctstoself_duration(sc->hw,
- sc->vif, pktlen, info));
- }
- ret = ah->ah_setup_tx_desc(ah, ds, pktlen,
- ieee80211_get_hdrlen_from_skb(skb), padsize,
- get_hw_packet_type(skb),
- (sc->power_level * 2),
- hw_rate,
- info->control.rates[0].count, keyidx, ah->ah_tx_ant, flags,
- cts_rate, duration);
- if (ret)
- goto err_unmap;
+ common->rx_bufsize = roundup(IEEE80211_MAX_FRAME_LEN, common->cachelsz);
- memset(mrr_rate, 0, sizeof(mrr_rate));
- memset(mrr_tries, 0, sizeof(mrr_tries));
- for (i = 0; i < 3; i++) {
- rate = ieee80211_get_alt_retry_rate(sc->hw, info, i);
- if (!rate)
- break;
+ ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "cachelsz %u rx_bufsize %u\n",
+ common->cachelsz, common->rx_bufsize);
- mrr_rate[i] = rate->hw_value;
- mrr_tries[i] = info->control.rates[i + 1].count;
+ spin_lock_bh(&sc->rxbuflock);
+ sc->rxlink = NULL;
+ list_for_each_entry(bf, &sc->rxbuf, list) {
+ ret = ath5k_rxbuf_setup(sc, bf);
+ if (ret != 0) {
+ spin_unlock_bh(&sc->rxbuflock);
+ goto err;
+ }
}
+ bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list);
+ ath5k_hw_set_rxdp(ah, bf->daddr);
+ spin_unlock_bh(&sc->rxbuflock);
- ath5k_hw_setup_mrr_tx_desc(ah, ds,
- mrr_rate[0], mrr_tries[0],
- mrr_rate[1], mrr_tries[1],
- mrr_rate[2], mrr_tries[2]);
-
- ds->ds_link = 0;
- ds->ds_data = bf->skbaddr;
-
- spin_lock_bh(&txq->lock);
- list_add_tail(&bf->list, &txq->q);
- if (txq->link == NULL) /* is this first packet? */
- ath5k_hw_set_txdp(ah, txq->qnum, bf->daddr);
- else /* no, so only link it */
- *txq->link = bf->daddr;
-
- txq->link = &ds->ds_link;
- ath5k_hw_start_tx_dma(ah, txq->qnum);
- mmiowb();
- spin_unlock_bh(&txq->lock);
+ ath5k_hw_start_rx_dma(ah); /* enable recv descriptors */
+ ath5k_mode_setup(sc); /* set filters, etc. */
+ ath5k_hw_start_rx_pcu(ah); /* re-enable PCU/DMA engine */
return 0;
-err_unmap:
- pci_unmap_single(sc->pdev, bf->skbaddr, skb->len, PCI_DMA_TODEVICE);
+err:
return ret;
}
-/*******************\
-* Descriptors setup *
-\*******************/
-
-static int
-ath5k_desc_alloc(struct ath5k_softc *sc, struct pci_dev *pdev)
+/*
+ * Disable the receive h/w in preparation for a reset.
+ */
+static void
+ath5k_rx_stop(struct ath5k_softc *sc)
{
- struct ath5k_desc *ds;
- struct ath5k_buf *bf;
- dma_addr_t da;
- unsigned int i;
- int ret;
+ struct ath5k_hw *ah = sc->ah;
- /* allocate descriptors */
- sc->desc_len = sizeof(struct ath5k_desc) *
- (ATH_TXBUF + ATH_RXBUF + ATH_BCBUF + 1);
- sc->desc = pci_alloc_consistent(pdev, sc->desc_len, &sc->desc_daddr);
- if (sc->desc == NULL) {
- ATH5K_ERR(sc, "can't allocate descriptors\n");
- ret = -ENOMEM;
- goto err;
- }
- ds = sc->desc;
- da = sc->desc_daddr;
- ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "DMA map: %p (%zu) -> %llx\n",
- ds, sc->desc_len, (unsigned long long)sc->desc_daddr);
+ ath5k_hw_stop_rx_pcu(ah); /* disable PCU */
+ ath5k_hw_set_rx_filter(ah, 0); /* clear recv filter */
+ ath5k_hw_stop_rx_dma(ah); /* disable DMA engine */
- bf = kcalloc(1 + ATH_TXBUF + ATH_RXBUF + ATH_BCBUF,
- sizeof(struct ath5k_buf), GFP_KERNEL);
- if (bf == NULL) {
- ATH5K_ERR(sc, "can't allocate bufptr\n");
- ret = -ENOMEM;
- goto err_free;
- }
- sc->bufptr = bf;
+ ath5k_debug_printrxbuffs(sc, ah);
+}
- INIT_LIST_HEAD(&sc->rxbuf);
- for (i = 0; i < ATH_RXBUF; i++, bf++, ds++, da += sizeof(*ds)) {
- bf->desc = ds;
- bf->daddr = da;
- list_add_tail(&bf->list, &sc->rxbuf);
- }
+static unsigned int
+ath5k_rx_decrypted(struct ath5k_softc *sc, struct sk_buff *skb,
+ struct ath5k_rx_status *rs)
+{
+ struct ath5k_hw *ah = sc->ah;
+ struct ath_common *common = ath5k_hw_common(ah);
+ struct ieee80211_hdr *hdr = (void *)skb->data;
+ unsigned int keyix, hlen;
- INIT_LIST_HEAD(&sc->txbuf);
- sc->txbuf_len = ATH_TXBUF;
- for (i = 0; i < ATH_TXBUF; i++, bf++, ds++,
- da += sizeof(*ds)) {
- bf->desc = ds;
- bf->daddr = da;
- list_add_tail(&bf->list, &sc->txbuf);
- }
+ if (!(rs->rs_status & AR5K_RXERR_DECRYPT) &&
+ rs->rs_keyix != AR5K_RXKEYIX_INVALID)
+ return RX_FLAG_DECRYPTED;
- /* beacon buffer */
- bf->desc = ds;
- bf->daddr = da;
- sc->bbuf = bf;
+ /* Apparently when a default key is used to decrypt the packet
+ the hw does not set the index used to decrypt. In such cases
+ get the index from the packet. */
+ hlen = ieee80211_hdrlen(hdr->frame_control);
+ if (ieee80211_has_protected(hdr->frame_control) &&
+ !(rs->rs_status & AR5K_RXERR_DECRYPT) &&
+ skb->len >= hlen + 4) {
+ keyix = skb->data[hlen + 3] >> 6;
+
+ if (test_bit(keyix, common->keymap))
+ return RX_FLAG_DECRYPTED;
+ }
return 0;
-err_free:
- pci_free_consistent(pdev, sc->desc_len, sc->desc, sc->desc_daddr);
-err:
- sc->desc = NULL;
- return ret;
}
+
static void
-ath5k_desc_free(struct ath5k_softc *sc, struct pci_dev *pdev)
+ath5k_check_ibss_tsf(struct ath5k_softc *sc, struct sk_buff *skb,
+ struct ieee80211_rx_status *rxs)
{
- struct ath5k_buf *bf;
+ struct ath_common *common = ath5k_hw_common(sc->ah);
+ u64 tsf, bc_tstamp;
+ u32 hw_tu;
+ struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
- ath5k_txbuf_free_skb(sc, sc->bbuf);
- list_for_each_entry(bf, &sc->txbuf, list)
- ath5k_txbuf_free_skb(sc, bf);
- list_for_each_entry(bf, &sc->rxbuf, list)
- ath5k_rxbuf_free_skb(sc, bf);
+ if (ieee80211_is_beacon(mgmt->frame_control) &&
+ le16_to_cpu(mgmt->u.beacon.capab_info) & WLAN_CAPABILITY_IBSS &&
+ memcmp(mgmt->bssid, common->curbssid, ETH_ALEN) == 0) {
+ /*
+ * Received an IBSS beacon with the same BSSID. Hardware *must*
+ * have updated the local TSF. We have to work around various
+ * hardware bugs, though...
+ */
+ tsf = ath5k_hw_get_tsf64(sc->ah);
+ bc_tstamp = le64_to_cpu(mgmt->u.beacon.timestamp);
+ hw_tu = TSF_TO_TU(tsf);
- /* Free memory associated with all descriptors */
- pci_free_consistent(pdev, sc->desc_len, sc->desc, sc->desc_daddr);
- sc->desc = NULL;
- sc->desc_daddr = 0;
+ ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
+ "beacon %llx mactime %llx (diff %lld) tsf now %llx\n",
+ (unsigned long long)bc_tstamp,
+ (unsigned long long)rxs->mactime,
+ (unsigned long long)(rxs->mactime - bc_tstamp),
+ (unsigned long long)tsf);
- kfree(sc->bufptr);
- sc->bufptr = NULL;
- sc->bbuf = NULL;
-}
+ /*
+ * Sometimes the HW will give us a wrong tstamp in the rx
+ * status, causing the timestamp extension to go wrong.
+ * (This seems to happen especially with beacon frames bigger
+ * than 78 byte (incl. FCS))
+ * But we know that the receive timestamp must be later than the
+ * timestamp of the beacon since HW must have synced to that.
+ *
+ * NOTE: here we assume mactime to be after the frame was
+ * received, not like mac80211 which defines it at the start.
+ */
+ if (bc_tstamp > rxs->mactime) {
+ ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
+ "fixing mactime from %llx to %llx\n",
+ (unsigned long long)rxs->mactime,
+ (unsigned long long)tsf);
+ rxs->mactime = tsf;
+ }
+ /*
+ * Local TSF might have moved higher than our beacon timers,
+ * in that case we have to update them to continue sending
+ * beacons. This also takes care of synchronizing beacon sending
+ * times with other stations.
+ */
+ if (hw_tu >= sc->nexttbtt)
+ ath5k_beacon_update_timers(sc, bc_tstamp);
+ }
+}
+static void
+ath5k_update_beacon_rssi(struct ath5k_softc *sc, struct sk_buff *skb, int rssi)
+{
+ struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
+ struct ath5k_hw *ah = sc->ah;
+ struct ath_common *common = ath5k_hw_common(ah);
+ /* only beacons from our BSSID */
+ if (!ieee80211_is_beacon(mgmt->frame_control) ||
+ memcmp(mgmt->bssid, common->curbssid, ETH_ALEN) != 0)
+ return;
+ ah->ah_beacon_rssi_avg = ath5k_moving_average(ah->ah_beacon_rssi_avg,
+ rssi);
-/**************\
-* Queues setup *
-\**************/
+ /* in IBSS mode we should keep RSSI statistics per neighbour */
+ /* le16_to_cpu(mgmt->u.beacon.capab_info) & WLAN_CAPABILITY_IBSS */
+}
-static struct ath5k_txq *
-ath5k_txq_setup(struct ath5k_softc *sc,
- int qtype, int subtype)
+/*
+ * Compute padding position. skb must contain an IEEE 802.11 frame
+ */
+static int ath5k_common_padpos(struct sk_buff *skb)
{
- struct ath5k_hw *ah = sc->ah;
- struct ath5k_txq *txq;
- struct ath5k_txq_info qi = {
- .tqi_subtype = subtype,
- .tqi_aifs = AR5K_TXQ_USEDEFAULT,
- .tqi_cw_min = AR5K_TXQ_USEDEFAULT,
- .tqi_cw_max = AR5K_TXQ_USEDEFAULT
- };
- int qnum;
+ struct ieee80211_hdr * hdr = (struct ieee80211_hdr *)skb->data;
+ __le16 frame_control = hdr->frame_control;
+ int padpos = 24;
- /*
- * Enable interrupts only for EOL and DESC conditions.
- * We mark tx descriptors to receive a DESC interrupt
- * when a tx queue gets deep; otherwise we wait for the
- * EOL to reap descriptors. Note that this is done to
- * reduce interrupt load and this only defers reaping
- * descriptors, never transmitting frames. Aside from
- * reducing interrupts this also permits more concurrency.
- * The only potential downside is if the tx queue backs
- * up in which case the top half of the kernel may backup
- * due to a lack of tx descriptors.
- */
- qi.tqi_flags = AR5K_TXQ_FLAG_TXEOLINT_ENABLE |
- AR5K_TXQ_FLAG_TXDESCINT_ENABLE;
- qnum = ath5k_hw_setup_tx_queue(ah, qtype, &qi);
- if (qnum < 0) {
- /*
- * NB: don't print a message, this happens
- * normally on parts with too few tx queues
- */
- return ERR_PTR(qnum);
- }
- if (qnum >= ARRAY_SIZE(sc->txqs)) {
- ATH5K_ERR(sc, "hw qnum %u out of range, max %tu!\n",
- qnum, ARRAY_SIZE(sc->txqs));
- ath5k_hw_release_tx_queue(ah, qnum);
- return ERR_PTR(-EINVAL);
+ if (ieee80211_has_a4(frame_control)) {
+ padpos += ETH_ALEN;
}
- txq = &sc->txqs[qnum];
- if (!txq->setup) {
- txq->qnum = qnum;
- txq->link = NULL;
- INIT_LIST_HEAD(&txq->q);
- spin_lock_init(&txq->lock);
- txq->setup = true;
+ if (ieee80211_is_data_qos(frame_control)) {
+ padpos += IEEE80211_QOS_CTL_LEN;
}
- return &sc->txqs[qnum];
+
+ return padpos;
}
-static int
-ath5k_beaconq_setup(struct ath5k_hw *ah)
+/*
+ * This function expects an 802.11 frame and returns the number of
+ * bytes added, or -1 if we don't have enough header room.
+ */
+static int ath5k_add_padding(struct sk_buff *skb)
{
- struct ath5k_txq_info qi = {
- .tqi_aifs = AR5K_TXQ_USEDEFAULT,
- .tqi_cw_min = AR5K_TXQ_USEDEFAULT,
- .tqi_cw_max = AR5K_TXQ_USEDEFAULT,
- /* NB: for dynamic turbo, don't enable any other interrupts */
- .tqi_flags = AR5K_TXQ_FLAG_TXDESCINT_ENABLE
- };
+ int padpos = ath5k_common_padpos(skb);
+ int padsize = padpos & 3;
- return ath5k_hw_setup_tx_queue(ah, AR5K_TX_QUEUE_BEACON, &qi);
-}
+ if (padsize && skb->len>padpos) {
-static int
-ath5k_beaconq_config(struct ath5k_softc *sc)
-{
- struct ath5k_hw *ah = sc->ah;
- struct ath5k_txq_info qi;
- int ret;
+ if (skb_headroom(skb) < padsize)
+ return -1;
- ret = ath5k_hw_get_tx_queueprops(ah, sc->bhalq, &qi);
- if (ret)
- goto err;
+ skb_push(skb, padsize);
+ memmove(skb->data, skb->data+padsize, padpos);
+ return padsize;
+ }
- if (sc->opmode == NL80211_IFTYPE_AP ||
- sc->opmode == NL80211_IFTYPE_MESH_POINT) {
- /*
- * Always burst out beacon and CAB traffic
- * (aifs = cwmin = cwmax = 0)
- */
- qi.tqi_aifs = 0;
- qi.tqi_cw_min = 0;
- qi.tqi_cw_max = 0;
- } else if (sc->opmode == NL80211_IFTYPE_ADHOC) {
- /*
- * Adhoc mode; backoff between 0 and (2 * cw_min).
- */
- qi.tqi_aifs = 0;
- qi.tqi_cw_min = 0;
- qi.tqi_cw_max = 2 * ah->ah_cw_min;
- }
+ return 0;
+}
- ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
- "beacon queueprops tqi_aifs:%d tqi_cw_min:%d tqi_cw_max:%d\n",
- qi.tqi_aifs, qi.tqi_cw_min, qi.tqi_cw_max);
+/*
+ * The MAC header is padded to have 32-bit boundary if the
+ * packet payload is non-zero. The general calculation for
+ * padsize would take into account odd header lengths:
+ * padsize = 4 - (hdrlen & 3); however, since only
+ * even-length headers are used, padding can only be 0 or 2
+ * bytes and we can optimize this a bit. We must not try to
+ * remove padding from short control frames that do not have a
+ * payload.
+ *
+ * This function expects an 802.11 frame and returns the number of
+ * bytes removed.
+ */
+static int ath5k_remove_padding(struct sk_buff *skb)
+{
+ int padpos = ath5k_common_padpos(skb);
+ int padsize = padpos & 3;
- ret = ath5k_hw_set_tx_queueprops(ah, sc->bhalq, &qi);
- if (ret) {
- ATH5K_ERR(sc, "%s: unable to update parameters for beacon "
- "hardware queue!\n", __func__);
- goto err;
+ if (padsize && skb->len>=padpos+padsize) {
+ memmove(skb->data + padsize, skb->data, padpos);
+ skb_pull(skb, padsize);
+ return padsize;
}
- ret = ath5k_hw_reset_tx_queue(ah, sc->bhalq); /* push to h/w */
- if (ret)
- goto err;
-
- /* reconfigure cabq with ready time to 80% of beacon_interval */
- ret = ath5k_hw_get_tx_queueprops(ah, AR5K_TX_QUEUE_ID_CAB, &qi);
- if (ret)
- goto err;
-
- qi.tqi_ready_time = (sc->bintval * 80) / 100;
- ret = ath5k_hw_set_tx_queueprops(ah, AR5K_TX_QUEUE_ID_CAB, &qi);
- if (ret)
- goto err;
- ret = ath5k_hw_reset_tx_queue(ah, AR5K_TX_QUEUE_ID_CAB);
-err:
- return ret;
+ return 0;
}
static void
-ath5k_txq_drainq(struct ath5k_softc *sc, struct ath5k_txq *txq)
+ath5k_receive_frame(struct ath5k_softc *sc, struct sk_buff *skb,
+ struct ath5k_rx_status *rs)
{
- struct ath5k_buf *bf, *bf0;
+ struct ieee80211_rx_status *rxs;
+
+ ath5k_remove_padding(skb);
+
+ rxs = IEEE80211_SKB_RXCB(skb);
+
+ rxs->flag = 0;
+ if (unlikely(rs->rs_status & AR5K_RXERR_MIC))
+ rxs->flag |= RX_FLAG_MMIC_ERROR;
/*
- * NB: this assumes output has been stopped and
- * we do not need to block ath5k_tx_tasklet
+ * always extend the mac timestamp, since this information is
+ * also needed for proper IBSS merging.
+ *
+ * XXX: it might be too late to do it here, since rs_tstamp is
+ * 15bit only. that means TSF extension has to be done within
+ * 32768usec (about 32ms). it might be necessary to move this to
+ * the interrupt handler, like it is done in madwifi.
+ *
+ * Unfortunately we don't know when the hardware takes the rx
+ * timestamp (beginning of phy frame, data frame, end of rx?).
+ * The only thing we know is that it is hardware specific...
+ * On AR5213 it seems the rx timestamp is at the end of the
+ * frame, but i'm not sure.
+ *
+ * NOTE: mac80211 defines mactime at the beginning of the first
+ * data symbol. Since we don't have any time references it's
+ * impossible to comply to that. This affects IBSS merge only
+ * right now, so it's not too bad...
*/
- spin_lock_bh(&txq->lock);
- list_for_each_entry_safe(bf, bf0, &txq->q, list) {
- ath5k_debug_printtxbuf(sc, bf);
-
- ath5k_txbuf_free_skb(sc, bf);
+ rxs->mactime = ath5k_extend_tsf(sc->ah, rs->rs_tstamp);
+ rxs->flag |= RX_FLAG_TSFT;
- spin_lock_bh(&sc->txbuflock);
- list_move_tail(&bf->list, &sc->txbuf);
- sc->txbuf_len++;
- spin_unlock_bh(&sc->txbuflock);
- }
- txq->link = NULL;
- spin_unlock_bh(&txq->lock);
-}
+ rxs->freq = sc->curchan->center_freq;
+ rxs->band = sc->curband->band;
-/*
- * Drain the transmit queues and reclaim resources.
- */
-static void
-ath5k_txq_cleanup(struct ath5k_softc *sc)
-{
- struct ath5k_hw *ah = sc->ah;
- unsigned int i;
+ rxs->signal = sc->ah->ah_noise_floor + rs->rs_rssi;
- /* XXX return value */
- if (likely(!test_bit(ATH_STAT_INVALID, sc->status))) {
- /* don't touch the hardware if marked invalid */
- ath5k_hw_stop_tx_dma(ah, sc->bhalq);
- ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "beacon queue %x\n",
- ath5k_hw_get_txdp(ah, sc->bhalq));
- for (i = 0; i < ARRAY_SIZE(sc->txqs); i++)
- if (sc->txqs[i].setup) {
- ath5k_hw_stop_tx_dma(ah, sc->txqs[i].qnum);
- ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "txq [%u] %x, "
- "link %p\n",
- sc->txqs[i].qnum,
- ath5k_hw_get_txdp(ah,
- sc->txqs[i].qnum),
- sc->txqs[i].link);
- }
- }
+ rxs->antenna = rs->rs_antenna;
- for (i = 0; i < ARRAY_SIZE(sc->txqs); i++)
- if (sc->txqs[i].setup)
- ath5k_txq_drainq(sc, &sc->txqs[i]);
-}
+ if (rs->rs_antenna > 0 && rs->rs_antenna < 5)
+ sc->stats.antenna_rx[rs->rs_antenna]++;
+ else
+ sc->stats.antenna_rx[0]++; /* invalid */
-static void
-ath5k_txq_release(struct ath5k_softc *sc)
-{
- struct ath5k_txq *txq = sc->txqs;
- unsigned int i;
+ rxs->rate_idx = ath5k_hw_to_driver_rix(sc, rs->rs_rate);
+ rxs->flag |= ath5k_rx_decrypted(sc, skb, rs);
- for (i = 0; i < ARRAY_SIZE(sc->txqs); i++, txq++)
- if (txq->setup) {
- ath5k_hw_release_tx_queue(sc->ah, txq->qnum);
- txq->setup = false;
- }
-}
+ if (rxs->rate_idx >= 0 && rs->rs_rate ==
+ sc->curband->bitrates[rxs->rate_idx].hw_value_short)
+ rxs->flag |= RX_FLAG_SHORTPRE;
+ ath5k_debug_dump_skb(sc, skb, "RX ", 0);
+ ath5k_update_beacon_rssi(sc, skb, rs->rs_rssi);
+ /* check beacons in IBSS mode */
+ if (sc->opmode == NL80211_IFTYPE_ADHOC)
+ ath5k_check_ibss_tsf(sc, skb, rxs);
-/*************\
-* RX Handling *
-\*************/
+ ieee80211_rx(sc->hw, skb);
+}
-/*
- * Enable the receive h/w following a reset.
+/** ath5k_frame_receive_ok() - Do we want to receive this frame or not?
+ *
+ * Check if we want to further process this frame or not. Also update
+ * statistics. Return true if we want this frame, false if not.
*/
-static int
-ath5k_rx_start(struct ath5k_softc *sc)
+static bool
+ath5k_receive_frame_ok(struct ath5k_softc *sc, struct ath5k_rx_status *rs)
{
- struct ath5k_hw *ah = sc->ah;
- struct ath_common *common = ath5k_hw_common(ah);
- struct ath5k_buf *bf;
- int ret;
-
- common->rx_bufsize = roundup(IEEE80211_MAX_FRAME_LEN, common->cachelsz);
-
- ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "cachelsz %u rx_bufsize %u\n",
- common->cachelsz, common->rx_bufsize);
+ sc->stats.rx_all_count++;
- spin_lock_bh(&sc->rxbuflock);
- sc->rxlink = NULL;
- list_for_each_entry(bf, &sc->rxbuf, list) {
- ret = ath5k_rxbuf_setup(sc, bf);
- if (ret != 0) {
- spin_unlock_bh(&sc->rxbuflock);
- goto err;
+ if (unlikely(rs->rs_status)) {
+ if (rs->rs_status & AR5K_RXERR_CRC)
+ sc->stats.rxerr_crc++;
+ if (rs->rs_status & AR5K_RXERR_FIFO)
+ sc->stats.rxerr_fifo++;
+ if (rs->rs_status & AR5K_RXERR_PHY) {
+ sc->stats.rxerr_phy++;
+ if (rs->rs_phyerr > 0 && rs->rs_phyerr < 32)
+ sc->stats.rxerr_phy_code[rs->rs_phyerr]++;
+ return false;
+ }
+ if (rs->rs_status & AR5K_RXERR_DECRYPT) {
+ /*
+ * Decrypt error. If the error occurred
+ * because there was no hardware key, then
+ * let the frame through so the upper layers
+ * can process it. This is necessary for 5210
+ * parts which have no way to setup a ``clear''
+ * key cache entry.
+ *
+ * XXX do key cache faulting
+ */
+ sc->stats.rxerr_decrypt++;
+ if (rs->rs_keyix == AR5K_RXKEYIX_INVALID &&
+ !(rs->rs_status & AR5K_RXERR_CRC))
+ return true;
+ }
+ if (rs->rs_status & AR5K_RXERR_MIC) {
+ sc->stats.rxerr_mic++;
+ return true;
}
- }
- bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list);
- ath5k_hw_set_rxdp(ah, bf->daddr);
- spin_unlock_bh(&sc->rxbuflock);
- ath5k_hw_start_rx_dma(ah); /* enable recv descriptors */
- ath5k_mode_setup(sc); /* set filters, etc. */
- ath5k_hw_start_rx_pcu(ah); /* re-enable PCU/DMA engine */
+ /* reject any frames with non-crypto errors */
+ if (rs->rs_status & ~(AR5K_RXERR_DECRYPT))
+ return false;
+ }
- return 0;
-err:
- return ret;
+ if (unlikely(rs->rs_more)) {
+ sc->stats.rxerr_jumbo++;
+ return false;
+ }
+ return true;
}
-/*
- * Disable the receive h/w in preparation for a reset.
- */
static void
-ath5k_rx_stop(struct ath5k_softc *sc)
-{
- struct ath5k_hw *ah = sc->ah;
-
- ath5k_hw_stop_rx_pcu(ah); /* disable PCU */
- ath5k_hw_set_rx_filter(ah, 0); /* clear recv filter */
- ath5k_hw_stop_rx_dma(ah); /* disable DMA engine */
-
- ath5k_debug_printrxbuffs(sc, ah);
-}
-
-static unsigned int
-ath5k_rx_decrypted(struct ath5k_softc *sc, struct sk_buff *skb,
- struct ath5k_rx_status *rs)
+ath5k_tasklet_rx(unsigned long data)
{
+ struct ath5k_rx_status rs = {};
+ struct sk_buff *skb, *next_skb;
+ dma_addr_t next_skb_addr;
+ struct ath5k_softc *sc = (void *)data;
struct ath5k_hw *ah = sc->ah;
struct ath_common *common = ath5k_hw_common(ah);
- struct ieee80211_hdr *hdr = (void *)skb->data;
- unsigned int keyix, hlen;
+ struct ath5k_buf *bf;
+ struct ath5k_desc *ds;
+ int ret;
- if (!(rs->rs_status & AR5K_RXERR_DECRYPT) &&
- rs->rs_keyix != AR5K_RXKEYIX_INVALID)
- return RX_FLAG_DECRYPTED;
+ spin_lock(&sc->rxbuflock);
+ if (list_empty(&sc->rxbuf)) {
+ ATH5K_WARN(sc, "empty rx buf pool\n");
+ goto unlock;
+ }
+ do {
+ bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list);
+ BUG_ON(bf->skb == NULL);
+ skb = bf->skb;
+ ds = bf->desc;
- /* Apparently when a default key is used to decrypt the packet
- the hw does not set the index used to decrypt. In such cases
- get the index from the packet. */
- hlen = ieee80211_hdrlen(hdr->frame_control);
- if (ieee80211_has_protected(hdr->frame_control) &&
- !(rs->rs_status & AR5K_RXERR_DECRYPT) &&
- skb->len >= hlen + 4) {
- keyix = skb->data[hlen + 3] >> 6;
+ /* bail if HW is still using self-linked descriptor */
+ if (ath5k_hw_get_rxdp(sc->ah) == bf->daddr)
+ break;
- if (test_bit(keyix, common->keymap))
- return RX_FLAG_DECRYPTED;
- }
+ ret = sc->ah->ah_proc_rx_desc(sc->ah, ds, &rs);
+ if (unlikely(ret == -EINPROGRESS))
+ break;
+ else if (unlikely(ret)) {
+ ATH5K_ERR(sc, "error in processing rx descriptor\n");
+ sc->stats.rxerr_proc++;
+ break;
+ }
- return 0;
-}
+ if (ath5k_receive_frame_ok(sc, &rs)) {
+ next_skb = ath5k_rx_skb_alloc(sc, &next_skb_addr);
+ /*
+ * If we can't replace bf->skb with a new skb under
+ * memory pressure, just skip this packet
+ */
+ if (!next_skb)
+ goto next;
-static void
-ath5k_check_ibss_tsf(struct ath5k_softc *sc, struct sk_buff *skb,
- struct ieee80211_rx_status *rxs)
-{
- struct ath_common *common = ath5k_hw_common(sc->ah);
- u64 tsf, bc_tstamp;
- u32 hw_tu;
- struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
+ pci_unmap_single(sc->pdev, bf->skbaddr,
+ common->rx_bufsize,
+ PCI_DMA_FROMDEVICE);
- if (ieee80211_is_beacon(mgmt->frame_control) &&
- le16_to_cpu(mgmt->u.beacon.capab_info) & WLAN_CAPABILITY_IBSS &&
- memcmp(mgmt->bssid, common->curbssid, ETH_ALEN) == 0) {
- /*
- * Received an IBSS beacon with the same BSSID. Hardware *must*
- * have updated the local TSF. We have to work around various
- * hardware bugs, though...
- */
- tsf = ath5k_hw_get_tsf64(sc->ah);
- bc_tstamp = le64_to_cpu(mgmt->u.beacon.timestamp);
- hw_tu = TSF_TO_TU(tsf);
+ skb_put(skb, rs.rs_datalen);
- ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
- "beacon %llx mactime %llx (diff %lld) tsf now %llx\n",
- (unsigned long long)bc_tstamp,
- (unsigned long long)rxs->mactime,
- (unsigned long long)(rxs->mactime - bc_tstamp),
- (unsigned long long)tsf);
+ ath5k_receive_frame(sc, skb, &rs);
- /*
- * Sometimes the HW will give us a wrong tstamp in the rx
- * status, causing the timestamp extension to go wrong.
- * (This seems to happen especially with beacon frames bigger
- * than 78 byte (incl. FCS))
- * But we know that the receive timestamp must be later than the
- * timestamp of the beacon since HW must have synced to that.
- *
- * NOTE: here we assume mactime to be after the frame was
- * received, not like mac80211 which defines it at the start.
- */
- if (bc_tstamp > rxs->mactime) {
- ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
- "fixing mactime from %llx to %llx\n",
- (unsigned long long)rxs->mactime,
- (unsigned long long)tsf);
- rxs->mactime = tsf;
+ bf->skb = next_skb;
+ bf->skbaddr = next_skb_addr;
}
-
- /*
- * Local TSF might have moved higher than our beacon timers,
- * in that case we have to update them to continue sending
- * beacons. This also takes care of synchronizing beacon sending
- * times with other stations.
- */
- if (hw_tu >= sc->nexttbtt)
- ath5k_beacon_update_timers(sc, bc_tstamp);
- }
+next:
+ list_move_tail(&bf->list, &sc->rxbuf);
+ } while (ath5k_rxbuf_setup(sc, bf) == 0);
+unlock:
+ spin_unlock(&sc->rxbuflock);
}
-static void
-ath5k_update_beacon_rssi(struct ath5k_softc *sc, struct sk_buff *skb, int rssi)
-{
- struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
- struct ath5k_hw *ah = sc->ah;
- struct ath_common *common = ath5k_hw_common(ah);
- /* only beacons from our BSSID */
- if (!ieee80211_is_beacon(mgmt->frame_control) ||
- memcmp(mgmt->bssid, common->curbssid, ETH_ALEN) != 0)
- return;
+/*************\
+* TX Handling *
+\*************/
- ah->ah_beacon_rssi_avg = ath5k_moving_average(ah->ah_beacon_rssi_avg,
- rssi);
+static int ath5k_tx_queue(struct ieee80211_hw *hw, struct sk_buff *skb,
+ struct ath5k_txq *txq)
+{
+ struct ath5k_softc *sc = hw->priv;
+ struct ath5k_buf *bf;
+ unsigned long flags;
+ int padsize;
- /* in IBSS mode we should keep RSSI statistics per neighbour */
- /* le16_to_cpu(mgmt->u.beacon.capab_info) & WLAN_CAPABILITY_IBSS */
-}
+ ath5k_debug_dump_skb(sc, skb, "TX ", 1);
-/*
- * Compute padding position. skb must contain an IEEE 802.11 frame
- */
-static int ath5k_common_padpos(struct sk_buff *skb)
-{
- struct ieee80211_hdr * hdr = (struct ieee80211_hdr *)skb->data;
- __le16 frame_control = hdr->frame_control;
- int padpos = 24;
+ /*
+ * The hardware expects the header padded to 4 byte boundaries.
+ * If this is not the case, we add the padding after the header.
+ */
+ padsize = ath5k_add_padding(skb);
+ if (padsize < 0) {
+ ATH5K_ERR(sc, "tx hdrlen not %%4: not enough"
+ " headroom to pad");
+ goto drop_packet;
+ }
- if (ieee80211_has_a4(frame_control)) {
- padpos += ETH_ALEN;
+ spin_lock_irqsave(&sc->txbuflock, flags);
+ if (list_empty(&sc->txbuf)) {
+ ATH5K_ERR(sc, "no further txbuf available, dropping packet\n");
+ spin_unlock_irqrestore(&sc->txbuflock, flags);
+ ieee80211_stop_queue(hw, skb_get_queue_mapping(skb));
+ goto drop_packet;
}
- if (ieee80211_is_data_qos(frame_control)) {
- padpos += IEEE80211_QOS_CTL_LEN;
+ bf = list_first_entry(&sc->txbuf, struct ath5k_buf, list);
+ list_del(&bf->list);
+ sc->txbuf_len--;
+ if (list_empty(&sc->txbuf))
+ ieee80211_stop_queues(hw);
+ spin_unlock_irqrestore(&sc->txbuflock, flags);
+
+ bf->skb = skb;
+
+ if (ath5k_txbuf_setup(sc, bf, txq, padsize)) {
+ bf->skb = NULL;
+ spin_lock_irqsave(&sc->txbuflock, flags);
+ list_add_tail(&bf->list, &sc->txbuf);
+ sc->txbuf_len++;
+ spin_unlock_irqrestore(&sc->txbuflock, flags);
+ goto drop_packet;
}
+ return NETDEV_TX_OK;
- return padpos;
+drop_packet:
+ dev_kfree_skb_any(skb);
+ return NETDEV_TX_OK;
}
-/*
- * This function expects an 802.11 frame and returns the number of
- * bytes added, or -1 if we don't have enough header room.
- */
-static int ath5k_add_padding(struct sk_buff *skb)
+
+static void
+ath5k_tx_processq(struct ath5k_softc *sc, struct ath5k_txq *txq)
{
- int padpos = ath5k_common_padpos(skb);
- int padsize = padpos & 3;
+ struct ath5k_tx_status ts = {};
+ struct ath5k_buf *bf, *bf0;
+ struct ath5k_desc *ds;
+ struct sk_buff *skb;
+ struct ieee80211_tx_info *info;
+ int i, ret;
- if (padsize && skb->len>padpos) {
+ spin_lock(&txq->lock);
+ list_for_each_entry_safe(bf, bf0, &txq->q, list) {
+ ds = bf->desc;
- if (skb_headroom(skb) < padsize)
- return -1;
+ /*
+ * It's possible that the hardware can say the buffer is
+ * completed when it hasn't yet loaded the ds_link from
+ * host memory and moved on. If there are more TX
+ * descriptors in the queue, wait for TXDP to change
+ * before processing this one.
+ */
+ if (ath5k_hw_get_txdp(sc->ah, txq->qnum) == bf->daddr &&
+ !list_is_last(&bf->list, &txq->q))
+ break;
- skb_push(skb, padsize);
- memmove(skb->data, skb->data+padsize, padpos);
- return padsize;
- }
+ ret = sc->ah->ah_proc_tx_desc(sc->ah, ds, &ts);
+ if (unlikely(ret == -EINPROGRESS))
+ break;
+ else if (unlikely(ret)) {
+ ATH5K_ERR(sc, "error %d while processing queue %u\n",
+ ret, txq->qnum);
+ break;
+ }
- return 0;
-}
-
-/*
- * The MAC header is padded to have 32-bit boundary if the
- * packet payload is non-zero. The general calculation for
- * padsize would take into account odd header lengths:
- * padsize = 4 - (hdrlen & 3); however, since only
- * even-length headers are used, padding can only be 0 or 2
- * bytes and we can optimize this a bit. We must not try to
- * remove padding from short control frames that do not have a
- * payload.
- *
- * This function expects an 802.11 frame and returns the number of
- * bytes removed.
- */
-static int ath5k_remove_padding(struct sk_buff *skb)
-{
- int padpos = ath5k_common_padpos(skb);
- int padsize = padpos & 3;
-
- if (padsize && skb->len>=padpos+padsize) {
- memmove(skb->data + padsize, skb->data, padpos);
- skb_pull(skb, padsize);
- return padsize;
- }
-
- return 0;
-}
-
-static void
-ath5k_receive_frame(struct ath5k_softc *sc, struct sk_buff *skb,
- struct ath5k_rx_status *rs)
-{
- struct ieee80211_rx_status *rxs;
-
- ath5k_remove_padding(skb);
-
- rxs = IEEE80211_SKB_RXCB(skb);
-
- rxs->flag = 0;
- if (unlikely(rs->rs_status & AR5K_RXERR_MIC))
- rxs->flag |= RX_FLAG_MMIC_ERROR;
-
- /*
- * always extend the mac timestamp, since this information is
- * also needed for proper IBSS merging.
- *
- * XXX: it might be too late to do it here, since rs_tstamp is
- * 15bit only. that means TSF extension has to be done within
- * 32768usec (about 32ms). it might be necessary to move this to
- * the interrupt handler, like it is done in madwifi.
- *
- * Unfortunately we don't know when the hardware takes the rx
- * timestamp (beginning of phy frame, data frame, end of rx?).
- * The only thing we know is that it is hardware specific...
- * On AR5213 it seems the rx timestamp is at the end of the
- * frame, but i'm not sure.
- *
- * NOTE: mac80211 defines mactime at the beginning of the first
- * data symbol. Since we don't have any time references it's
- * impossible to comply to that. This affects IBSS merge only
- * right now, so it's not too bad...
- */
- rxs->mactime = ath5k_extend_tsf(sc->ah, rs->rs_tstamp);
- rxs->flag |= RX_FLAG_TSFT;
-
- rxs->freq = sc->curchan->center_freq;
- rxs->band = sc->curband->band;
-
- rxs->signal = sc->ah->ah_noise_floor + rs->rs_rssi;
-
- rxs->antenna = rs->rs_antenna;
-
- if (rs->rs_antenna > 0 && rs->rs_antenna < 5)
- sc->stats.antenna_rx[rs->rs_antenna]++;
- else
- sc->stats.antenna_rx[0]++; /* invalid */
-
- rxs->rate_idx = ath5k_hw_to_driver_rix(sc, rs->rs_rate);
- rxs->flag |= ath5k_rx_decrypted(sc, skb, rs);
-
- if (rxs->rate_idx >= 0 && rs->rs_rate ==
- sc->curband->bitrates[rxs->rate_idx].hw_value_short)
- rxs->flag |= RX_FLAG_SHORTPRE;
-
- ath5k_debug_dump_skb(sc, skb, "RX ", 0);
-
- ath5k_update_beacon_rssi(sc, skb, rs->rs_rssi);
-
- /* check beacons in IBSS mode */
- if (sc->opmode == NL80211_IFTYPE_ADHOC)
- ath5k_check_ibss_tsf(sc, skb, rxs);
-
- ieee80211_rx(sc->hw, skb);
-}
-
-/** ath5k_frame_receive_ok() - Do we want to receive this frame or not?
- *
- * Check if we want to further process this frame or not. Also update
- * statistics. Return true if we want this frame, false if not.
- */
-static bool
-ath5k_receive_frame_ok(struct ath5k_softc *sc, struct ath5k_rx_status *rs)
-{
- sc->stats.rx_all_count++;
-
- if (unlikely(rs->rs_status)) {
- if (rs->rs_status & AR5K_RXERR_CRC)
- sc->stats.rxerr_crc++;
- if (rs->rs_status & AR5K_RXERR_FIFO)
- sc->stats.rxerr_fifo++;
- if (rs->rs_status & AR5K_RXERR_PHY) {
- sc->stats.rxerr_phy++;
- if (rs->rs_phyerr > 0 && rs->rs_phyerr < 32)
- sc->stats.rxerr_phy_code[rs->rs_phyerr]++;
- return false;
- }
- if (rs->rs_status & AR5K_RXERR_DECRYPT) {
- /*
- * Decrypt error. If the error occurred
- * because there was no hardware key, then
- * let the frame through so the upper layers
- * can process it. This is necessary for 5210
- * parts which have no way to setup a ``clear''
- * key cache entry.
- *
- * XXX do key cache faulting
- */
- sc->stats.rxerr_decrypt++;
- if (rs->rs_keyix == AR5K_RXKEYIX_INVALID &&
- !(rs->rs_status & AR5K_RXERR_CRC))
- return true;
- }
- if (rs->rs_status & AR5K_RXERR_MIC) {
- sc->stats.rxerr_mic++;
- return true;
- }
-
- /* reject any frames with non-crypto errors */
- if (rs->rs_status & ~(AR5K_RXERR_DECRYPT))
- return false;
- }
-
- if (unlikely(rs->rs_more)) {
- sc->stats.rxerr_jumbo++;
- return false;
- }
- return true;
-}
-
-static void
-ath5k_tasklet_rx(unsigned long data)
-{
- struct ath5k_rx_status rs = {};
- struct sk_buff *skb, *next_skb;
- dma_addr_t next_skb_addr;
- struct ath5k_softc *sc = (void *)data;
- struct ath5k_hw *ah = sc->ah;
- struct ath_common *common = ath5k_hw_common(ah);
- struct ath5k_buf *bf;
- struct ath5k_desc *ds;
- int ret;
-
- spin_lock(&sc->rxbuflock);
- if (list_empty(&sc->rxbuf)) {
- ATH5K_WARN(sc, "empty rx buf pool\n");
- goto unlock;
- }
- do {
- bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list);
- BUG_ON(bf->skb == NULL);
- skb = bf->skb;
- ds = bf->desc;
-
- /* bail if HW is still using self-linked descriptor */
- if (ath5k_hw_get_rxdp(sc->ah) == bf->daddr)
- break;
-
- ret = sc->ah->ah_proc_rx_desc(sc->ah, ds, &rs);
- if (unlikely(ret == -EINPROGRESS))
- break;
- else if (unlikely(ret)) {
- ATH5K_ERR(sc, "error in processing rx descriptor\n");
- sc->stats.rxerr_proc++;
- break;
- }
-
- if (ath5k_receive_frame_ok(sc, &rs)) {
- next_skb = ath5k_rx_skb_alloc(sc, &next_skb_addr);
-
- /*
- * If we can't replace bf->skb with a new skb under
- * memory pressure, just skip this packet
- */
- if (!next_skb)
- goto next;
-
- pci_unmap_single(sc->pdev, bf->skbaddr,
- common->rx_bufsize,
- PCI_DMA_FROMDEVICE);
-
- skb_put(skb, rs.rs_datalen);
-
- ath5k_receive_frame(sc, skb, &rs);
-
- bf->skb = next_skb;
- bf->skbaddr = next_skb_addr;
- }
-next:
- list_move_tail(&bf->list, &sc->rxbuf);
- } while (ath5k_rxbuf_setup(sc, bf) == 0);
-unlock:
- spin_unlock(&sc->rxbuflock);
-}
-
-
-/*************\
-* TX Handling *
-\*************/
-
-static void
-ath5k_tx_processq(struct ath5k_softc *sc, struct ath5k_txq *txq)
-{
- struct ath5k_tx_status ts = {};
- struct ath5k_buf *bf, *bf0;
- struct ath5k_desc *ds;
- struct sk_buff *skb;
- struct ieee80211_tx_info *info;
- int i, ret;
-
- spin_lock(&txq->lock);
- list_for_each_entry_safe(bf, bf0, &txq->q, list) {
- ds = bf->desc;
-
- /*
- * It's possible that the hardware can say the buffer is
- * completed when it hasn't yet loaded the ds_link from
- * host memory and moved on. If there are more TX
- * descriptors in the queue, wait for TXDP to change
- * before processing this one.
- */
- if (ath5k_hw_get_txdp(sc->ah, txq->qnum) == bf->daddr &&
- !list_is_last(&bf->list, &txq->q))
- break;
-
- ret = sc->ah->ah_proc_tx_desc(sc->ah, ds, &ts);
- if (unlikely(ret == -EINPROGRESS))
- break;
- else if (unlikely(ret)) {
- ATH5K_ERR(sc, "error %d while processing queue %u\n",
- ret, txq->qnum);
- break;
- }
-
- sc->stats.tx_all_count++;
- skb = bf->skb;
- info = IEEE80211_SKB_CB(skb);
- bf->skb = NULL;
+ sc->stats.tx_all_count++;
+ skb = bf->skb;
+ info = IEEE80211_SKB_CB(skb);
+ bf->skb = NULL;
pci_unmap_single(sc->pdev, bf->skbaddr, skb->len,
PCI_DMA_TODEVICE);
}
/*
+ * Updates the beacon that is sent by ath5k_beacon_send. For adhoc,
+ * this is called only once at config_bss time, for AP we do it every
+ * SWBA interrupt so that the TIM will reflect buffered frames.
+ *
+ * Called with the beacon lock.
+ */
+static int
+ath5k_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
+{
+ int ret;
+ struct ath5k_softc *sc = hw->priv;
+ struct sk_buff *skb;
+
+ if (WARN_ON(!vif)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ skb = ieee80211_beacon_get(hw, vif);
+
+ if (!skb) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ath5k_debug_dump_skb(sc, skb, "BC ", 1);
+
+ ath5k_txbuf_free_skb(sc, sc->bbuf);
+ sc->bbuf->skb = skb;
+ ret = ath5k_beacon_setup(sc, sc->bbuf);
+ if (ret)
+ sc->bbuf->skb = NULL;
+out:
+ return ret;
+}
+
+/*
* Transmit a beacon frame at SWBA. Dynamic updates to the
* frame contents are done as needed and the slot time is
* also adjusted based on current state.
sc->bsent++;
}
-
/**
* ath5k_beacon_update_timers - update beacon timers
*
intval & AR5K_BEACON_RESET_TSF ? "AR5K_BEACON_RESET_TSF" : "");
}
-
/**
* ath5k_beacon_config - Configure the beacon queues and interrupts
*
* Interrupt handling *
\********************/
-static int
-ath5k_init(struct ath5k_softc *sc)
-{
- struct ath5k_hw *ah = sc->ah;
- struct ath_common *common = ath5k_hw_common(ah);
- int ret, i;
-
- mutex_lock(&sc->lock);
-
- ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "mode %d\n", sc->opmode);
-
- /*
- * Stop anything previously setup. This is safe
- * no matter this is the first time through or not.
- */
- ath5k_stop_locked(sc);
-
- /*
- * The basic interface to setting the hardware in a good
- * state is ``reset''. On return the hardware is known to
- * be powered up and with interrupts disabled. This must
- * be followed by initialization of the appropriate bits
- * and then setup of the interrupt mask.
- */
- sc->curchan = sc->hw->conf.channel;
- sc->curband = &sc->sbands[sc->curchan->band];
- sc->imask = AR5K_INT_RXOK | AR5K_INT_RXERR | AR5K_INT_RXEOL |
- AR5K_INT_RXORN | AR5K_INT_TXDESC | AR5K_INT_TXEOL |
- AR5K_INT_FATAL | AR5K_INT_GLOBAL | AR5K_INT_MIB;
-
- ret = ath5k_reset(sc, NULL);
- if (ret)
- goto done;
-
- ath5k_rfkill_hw_start(ah);
-
- /*
- * Reset the key cache since some parts do not reset the
- * contents on initial power up or resume from suspend.
- */
- for (i = 0; i < common->keymax; i++)
- ath_hw_keyreset(common, (u16)i);
-
- ath5k_hw_set_ack_bitrate_high(ah, true);
- ret = 0;
-done:
- mmiowb();
- mutex_unlock(&sc->lock);
- return ret;
-}
-
-static int
-ath5k_stop_locked(struct ath5k_softc *sc)
-{
- struct ath5k_hw *ah = sc->ah;
-
- ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "invalid %u\n",
- test_bit(ATH_STAT_INVALID, sc->status));
-
- /*
- * Shutdown the hardware and driver:
- * stop output from above
- * disable interrupts
- * turn off timers
- * turn off the radio
- * clear transmit machinery
- * clear receive machinery
- * drain and release tx queues
- * reclaim beacon resources
- * power down hardware
- *
- * Note that some of this work is not possible if the
- * hardware is gone (invalid).
- */
- ieee80211_stop_queues(sc->hw);
-
- if (!test_bit(ATH_STAT_INVALID, sc->status)) {
- ath5k_led_off(sc);
- ath5k_hw_set_imr(ah, 0);
- synchronize_irq(sc->pdev->irq);
- }
- ath5k_txq_cleanup(sc);
- if (!test_bit(ATH_STAT_INVALID, sc->status)) {
- ath5k_rx_stop(sc);
- ath5k_hw_phy_disable(ah);
- }
-
- return 0;
-}
-
-static void stop_tasklets(struct ath5k_softc *sc)
-{
- tasklet_kill(&sc->rxtq);
- tasklet_kill(&sc->txtq);
- tasklet_kill(&sc->calib);
- tasklet_kill(&sc->beacontq);
- tasklet_kill(&sc->ani_tasklet);
-}
-
-/*
- * Stop the device, grabbing the top-level lock to protect
- * against concurrent entry through ath5k_init (which can happen
- * if another thread does a system call and the thread doing the
- * stop is preempted).
- */
-static int
-ath5k_stop_hw(struct ath5k_softc *sc)
-{
- int ret;
-
- mutex_lock(&sc->lock);
- ret = ath5k_stop_locked(sc);
- if (ret == 0 && !test_bit(ATH_STAT_INVALID, sc->status)) {
- /*
- * Don't set the card in full sleep mode!
- *
- * a) When the device is in this state it must be carefully
- * woken up or references to registers in the PCI clock
- * domain may freeze the bus (and system). This varies
- * by chip and is mostly an issue with newer parts
- * (madwifi sources mentioned srev >= 0x78) that go to
- * sleep more quickly.
- *
- * b) On older chips full sleep results a weird behaviour
- * during wakeup. I tested various cards with srev < 0x78
- * and they don't wake up after module reload, a second
- * module reload is needed to bring the card up again.
- *
- * Until we figure out what's going on don't enable
- * full chip reset on any chip (this is what Legacy HAL
- * and Sam's HAL do anyway). Instead Perform a full reset
- * on the device (same as initial state after attach) and
- * leave it idle (keep MAC/BB on warm reset) */
- ret = ath5k_hw_on_hold(sc->ah);
-
- ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
- "putting device to sleep\n");
- }
- ath5k_txbuf_free_skb(sc, sc->bbuf);
-
- mmiowb();
- mutex_unlock(&sc->lock);
-
- stop_tasklets(sc);
-
- ath5k_rfkill_hw_stop(sc->ah);
-
- return ret;
-}
-
static void
ath5k_intr_calibration_poll(struct ath5k_hw *ah)
{
}
-/********************\
-* Mac80211 functions *
-\********************/
+/*************************\
+* Initialization routines *
+\*************************/
static int
-ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
+ath5k_stop_locked(struct ath5k_softc *sc)
{
- struct ath5k_softc *sc = hw->priv;
+ struct ath5k_hw *ah = sc->ah;
- return ath5k_tx_queue(hw, skb, sc->txq);
+ ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "invalid %u\n",
+ test_bit(ATH_STAT_INVALID, sc->status));
+
+ /*
+ * Shutdown the hardware and driver:
+ * stop output from above
+ * disable interrupts
+ * turn off timers
+ * turn off the radio
+ * clear transmit machinery
+ * clear receive machinery
+ * drain and release tx queues
+ * reclaim beacon resources
+ * power down hardware
+ *
+ * Note that some of this work is not possible if the
+ * hardware is gone (invalid).
+ */
+ ieee80211_stop_queues(sc->hw);
+
+ if (!test_bit(ATH_STAT_INVALID, sc->status)) {
+ ath5k_led_off(sc);
+ ath5k_hw_set_imr(ah, 0);
+ synchronize_irq(sc->pdev->irq);
+ }
+ ath5k_txq_cleanup(sc);
+ if (!test_bit(ATH_STAT_INVALID, sc->status)) {
+ ath5k_rx_stop(sc);
+ ath5k_hw_phy_disable(ah);
+ }
+
+ return 0;
}
-static int ath5k_tx_queue(struct ieee80211_hw *hw, struct sk_buff *skb,
- struct ath5k_txq *txq)
+static int
+ath5k_init(struct ath5k_softc *sc)
{
- struct ath5k_softc *sc = hw->priv;
- struct ath5k_buf *bf;
- unsigned long flags;
- int padsize;
+ struct ath5k_hw *ah = sc->ah;
+ struct ath_common *common = ath5k_hw_common(ah);
+ int ret, i;
- ath5k_debug_dump_skb(sc, skb, "TX ", 1);
+ mutex_lock(&sc->lock);
+
+ ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "mode %d\n", sc->opmode);
/*
- * The hardware expects the header padded to 4 byte boundaries.
- * If this is not the case, we add the padding after the header.
+ * Stop anything previously setup. This is safe
+ * no matter this is the first time through or not.
*/
- padsize = ath5k_add_padding(skb);
- if (padsize < 0) {
- ATH5K_ERR(sc, "tx hdrlen not %%4: not enough"
- " headroom to pad");
- goto drop_packet;
- }
+ ath5k_stop_locked(sc);
- spin_lock_irqsave(&sc->txbuflock, flags);
- if (list_empty(&sc->txbuf)) {
- ATH5K_ERR(sc, "no further txbuf available, dropping packet\n");
- spin_unlock_irqrestore(&sc->txbuflock, flags);
- ieee80211_stop_queue(hw, skb_get_queue_mapping(skb));
- goto drop_packet;
- }
- bf = list_first_entry(&sc->txbuf, struct ath5k_buf, list);
- list_del(&bf->list);
- sc->txbuf_len--;
- if (list_empty(&sc->txbuf))
- ieee80211_stop_queues(hw);
- spin_unlock_irqrestore(&sc->txbuflock, flags);
+ /*
+ * The basic interface to setting the hardware in a good
+ * state is ``reset''. On return the hardware is known to
+ * be powered up and with interrupts disabled. This must
+ * be followed by initialization of the appropriate bits
+ * and then setup of the interrupt mask.
+ */
+ sc->curchan = sc->hw->conf.channel;
+ sc->curband = &sc->sbands[sc->curchan->band];
+ sc->imask = AR5K_INT_RXOK | AR5K_INT_RXERR | AR5K_INT_RXEOL |
+ AR5K_INT_RXORN | AR5K_INT_TXDESC | AR5K_INT_TXEOL |
+ AR5K_INT_FATAL | AR5K_INT_GLOBAL | AR5K_INT_MIB;
- bf->skb = skb;
+ ret = ath5k_reset(sc, NULL);
+ if (ret)
+ goto done;
- if (ath5k_txbuf_setup(sc, bf, txq, padsize)) {
- bf->skb = NULL;
- spin_lock_irqsave(&sc->txbuflock, flags);
- list_add_tail(&bf->list, &sc->txbuf);
- sc->txbuf_len++;
- spin_unlock_irqrestore(&sc->txbuflock, flags);
- goto drop_packet;
+ ath5k_rfkill_hw_start(ah);
+
+ /*
+ * Reset the key cache since some parts do not reset the
+ * contents on initial power up or resume from suspend.
+ */
+ for (i = 0; i < common->keymax; i++)
+ ath_hw_keyreset(common, (u16) i);
+
+ ath5k_hw_set_ack_bitrate_high(ah, true);
+ ret = 0;
+done:
+ mmiowb();
+ mutex_unlock(&sc->lock);
+ return ret;
+}
+
+static void stop_tasklets(struct ath5k_softc *sc)
+{
+ tasklet_kill(&sc->rxtq);
+ tasklet_kill(&sc->txtq);
+ tasklet_kill(&sc->calib);
+ tasklet_kill(&sc->beacontq);
+ tasklet_kill(&sc->ani_tasklet);
+}
+
+/*
+ * Stop the device, grabbing the top-level lock to protect
+ * against concurrent entry through ath5k_init (which can happen
+ * if another thread does a system call and the thread doing the
+ * stop is preempted).
+ */
+static int
+ath5k_stop_hw(struct ath5k_softc *sc)
+{
+ int ret;
+
+ mutex_lock(&sc->lock);
+ ret = ath5k_stop_locked(sc);
+ if (ret == 0 && !test_bit(ATH_STAT_INVALID, sc->status)) {
+ /*
+ * Don't set the card in full sleep mode!
+ *
+ * a) When the device is in this state it must be carefully
+ * woken up or references to registers in the PCI clock
+ * domain may freeze the bus (and system). This varies
+ * by chip and is mostly an issue with newer parts
+ * (madwifi sources mentioned srev >= 0x78) that go to
+ * sleep more quickly.
+ *
+ * b) On older chips full sleep results a weird behaviour
+ * during wakeup. I tested various cards with srev < 0x78
+ * and they don't wake up after module reload, a second
+ * module reload is needed to bring the card up again.
+ *
+ * Until we figure out what's going on don't enable
+ * full chip reset on any chip (this is what Legacy HAL
+ * and Sam's HAL do anyway). Instead Perform a full reset
+ * on the device (same as initial state after attach) and
+ * leave it idle (keep MAC/BB on warm reset) */
+ ret = ath5k_hw_on_hold(sc->ah);
+
+ ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
+ "putting device to sleep\n");
}
- return NETDEV_TX_OK;
+ ath5k_txbuf_free_skb(sc, sc->bbuf);
-drop_packet:
- dev_kfree_skb_any(skb);
- return NETDEV_TX_OK;
+ mmiowb();
+ mutex_unlock(&sc->lock);
+
+ stop_tasklets(sc);
+
+ ath5k_rfkill_hw_stop(sc->ah);
+
+ return ret;
}
/*
mutex_unlock(&sc->lock);
}
-static int ath5k_start(struct ieee80211_hw *hw)
-{
- return ath5k_init(hw->priv);
-}
-
-static void ath5k_stop(struct ieee80211_hw *hw)
-{
- ath5k_stop_hw(hw->priv);
-}
-
-static int ath5k_add_interface(struct ieee80211_hw *hw,
- struct ieee80211_vif *vif)
+static int
+ath5k_attach(struct pci_dev *pdev, struct ieee80211_hw *hw)
{
struct ath5k_softc *sc = hw->priv;
+ struct ath5k_hw *ah = sc->ah;
+ struct ath_regulatory *regulatory = ath5k_hw_regulatory(ah);
+ u8 mac[ETH_ALEN] = {};
int ret;
- mutex_lock(&sc->lock);
- if (sc->vif) {
- ret = 0;
- goto end;
- }
-
- sc->vif = vif;
+ ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "devid 0x%x\n", pdev->device);
- switch (vif->type) {
- case NL80211_IFTYPE_AP:
- case NL80211_IFTYPE_STATION:
- case NL80211_IFTYPE_ADHOC:
- case NL80211_IFTYPE_MESH_POINT:
- sc->opmode = vif->type;
- break;
- default:
- ret = -EOPNOTSUPP;
- goto end;
- }
+ /*
+ * Check if the MAC has multi-rate retry support.
+ * We do this by trying to setup a fake extended
+ * descriptor. MACs that don't have support will
+ * return false w/o doing anything. MACs that do
+ * support it will return true w/o doing anything.
+ */
+ ret = ath5k_hw_setup_mrr_tx_desc(ah, NULL, 0, 0, 0, 0, 0, 0);
- ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "add interface mode %d\n", sc->opmode);
+ if (ret < 0)
+ goto err;
+ if (ret > 0)
+ __set_bit(ATH_STAT_MRRETRY, sc->status);
- ath5k_hw_set_lladdr(sc->ah, vif->addr);
- ath5k_mode_setup(sc);
+ /*
+ * Collect the channel list. The 802.11 layer
+ * is resposible for filtering this list based
+ * on settings like the phy mode and regulatory
+ * domain restrictions.
+ */
+ ret = ath5k_setup_bands(hw);
+ if (ret) {
+ ATH5K_ERR(sc, "can't get channels\n");
+ goto err;
+ }
- ret = 0;
-end:
- mutex_unlock(&sc->lock);
- return ret;
-}
+ /* NB: setup here so ath5k_rate_update is happy */
+ if (test_bit(AR5K_MODE_11A, ah->ah_modes))
+ ath5k_setcurmode(sc, AR5K_MODE_11A);
+ else
+ ath5k_setcurmode(sc, AR5K_MODE_11B);
-static void
-ath5k_remove_interface(struct ieee80211_hw *hw,
- struct ieee80211_vif *vif)
-{
- struct ath5k_softc *sc = hw->priv;
- u8 mac[ETH_ALEN] = {};
+ /*
+ * Allocate tx+rx descriptors and populate the lists.
+ */
+ ret = ath5k_desc_alloc(sc, pdev);
+ if (ret) {
+ ATH5K_ERR(sc, "can't allocate descriptors\n");
+ goto err;
+ }
- mutex_lock(&sc->lock);
- if (sc->vif != vif)
- goto end;
+ /*
+ * Allocate hardware transmit queues: one queue for
+ * beacon frames and one data queue for each QoS
+ * priority. Note that hw functions handle resetting
+ * these queues at the needed time.
+ */
+ ret = ath5k_beaconq_setup(ah);
+ if (ret < 0) {
+ ATH5K_ERR(sc, "can't setup a beacon xmit queue\n");
+ goto err_desc;
+ }
+ sc->bhalq = ret;
+ sc->cabq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_CAB, 0);
+ if (IS_ERR(sc->cabq)) {
+ ATH5K_ERR(sc, "can't setup cab queue\n");
+ ret = PTR_ERR(sc->cabq);
+ goto err_bhal;
+ }
- ath5k_hw_set_lladdr(sc->ah, mac);
- sc->vif = NULL;
-end:
- mutex_unlock(&sc->lock);
-}
+ sc->txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BK);
+ if (IS_ERR(sc->txq)) {
+ ATH5K_ERR(sc, "can't setup xmit queue\n");
+ ret = PTR_ERR(sc->txq);
+ goto err_queues;
+ }
-/*
- * TODO: Phy disable/diversity etc
- */
-static int
-ath5k_config(struct ieee80211_hw *hw, u32 changed)
-{
- struct ath5k_softc *sc = hw->priv;
- struct ath5k_hw *ah = sc->ah;
- struct ieee80211_conf *conf = &hw->conf;
- int ret = 0;
+ tasklet_init(&sc->rxtq, ath5k_tasklet_rx, (unsigned long)sc);
+ tasklet_init(&sc->txtq, ath5k_tasklet_tx, (unsigned long)sc);
+ tasklet_init(&sc->calib, ath5k_tasklet_calibrate, (unsigned long)sc);
+ tasklet_init(&sc->beacontq, ath5k_tasklet_beacon, (unsigned long)sc);
+ tasklet_init(&sc->ani_tasklet, ath5k_tasklet_ani, (unsigned long)sc);
- mutex_lock(&sc->lock);
+ INIT_WORK(&sc->reset_work, ath5k_reset_work);
- if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
- ret = ath5k_chan_set(sc, conf->channel);
- if (ret < 0)
- goto unlock;
+ ret = ath5k_eeprom_read_mac(ah, mac);
+ if (ret) {
+ ATH5K_ERR(sc, "unable to read address from EEPROM: 0x%04x\n",
+ sc->pdev->device);
+ goto err_queues;
}
- if ((changed & IEEE80211_CONF_CHANGE_POWER) &&
- (sc->power_level != conf->power_level)) {
+ SET_IEEE80211_PERM_ADDR(hw, mac);
+ /* All MAC address bits matter for ACKs */
+ memcpy(sc->bssidmask, ath_bcast_mac, ETH_ALEN);
+ ath5k_hw_set_bssid_mask(sc->ah, sc->bssidmask);
+
+ regulatory->current_rd = ah->ah_capabilities.cap_eeprom.ee_regdomain;
+ ret = ath_regd_init(regulatory, hw->wiphy, ath5k_reg_notifier);
+ if (ret) {
+ ATH5K_ERR(sc, "can't initialize regulatory system\n");
+ goto err_queues;
+ }
+
+ ret = ieee80211_register_hw(hw);
+ if (ret) {
+ ATH5K_ERR(sc, "can't register ieee80211 hw\n");
+ goto err_queues;
+ }
+
+ if (!ath_is_world_regd(regulatory))
+ regulatory_hint(hw->wiphy, regulatory->alpha2);
+
+ ath5k_init_leds(sc);
+
+ ath5k_sysfs_register(sc);
+
+ return 0;
+err_queues:
+ ath5k_txq_release(sc);
+err_bhal:
+ ath5k_hw_release_tx_queue(ah, sc->bhalq);
+err_desc:
+ ath5k_desc_free(sc, pdev);
+err:
+ return ret;
+}
+
+static void
+ath5k_detach(struct pci_dev *pdev, struct ieee80211_hw *hw)
+{
+ struct ath5k_softc *sc = hw->priv;
+
+ /*
+ * NB: the order of these is important:
+ * o call the 802.11 layer before detaching ath5k_hw to
+ * ensure callbacks into the driver to delete global
+ * key cache entries can be handled
+ * o reclaim the tx queue data structures after calling
+ * the 802.11 layer as we'll get called back to reclaim
+ * node state and potentially want to use them
+ * o to cleanup the tx queues the hal is called, so detach
+ * it last
+ * XXX: ??? detach ath5k_hw ???
+ * Other than that, it's straightforward...
+ */
+ ieee80211_unregister_hw(hw);
+ ath5k_desc_free(sc, pdev);
+ ath5k_txq_release(sc);
+ ath5k_hw_release_tx_queue(sc->ah, sc->bhalq);
+ ath5k_unregister_leds(sc);
+
+ ath5k_sysfs_unregister(sc);
+ /*
+ * NB: can't reclaim these until after ieee80211_ifdetach
+ * returns because we'll get called back to reclaim node
+ * state and potentially want to use them.
+ */
+}
+
+/********************\
+* Mac80211 functions *
+\********************/
+
+static int
+ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
+{
+ struct ath5k_softc *sc = hw->priv;
+
+ return ath5k_tx_queue(hw, skb, sc->txq);
+}
+
+static int ath5k_start(struct ieee80211_hw *hw)
+{
+ return ath5k_init(hw->priv);
+}
+
+static void ath5k_stop(struct ieee80211_hw *hw)
+{
+ ath5k_stop_hw(hw->priv);
+}
+
+static int ath5k_add_interface(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif)
+{
+ struct ath5k_softc *sc = hw->priv;
+ int ret;
+
+ mutex_lock(&sc->lock);
+ if (sc->vif) {
+ ret = 0;
+ goto end;
+ }
+
+ sc->vif = vif;
+
+ switch (vif->type) {
+ case NL80211_IFTYPE_AP:
+ case NL80211_IFTYPE_STATION:
+ case NL80211_IFTYPE_ADHOC:
+ case NL80211_IFTYPE_MESH_POINT:
+ sc->opmode = vif->type;
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ goto end;
+ }
+
+ ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "add interface mode %d\n", sc->opmode);
+
+ ath5k_hw_set_lladdr(sc->ah, vif->addr);
+ ath5k_mode_setup(sc);
+
+ ret = 0;
+end:
+ mutex_unlock(&sc->lock);
+ return ret;
+}
+
+static void
+ath5k_remove_interface(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif)
+{
+ struct ath5k_softc *sc = hw->priv;
+ u8 mac[ETH_ALEN] = {};
+
+ mutex_lock(&sc->lock);
+ if (sc->vif != vif)
+ goto end;
+
+ ath5k_hw_set_lladdr(sc->ah, mac);
+ sc->vif = NULL;
+end:
+ mutex_unlock(&sc->lock);
+}
+
+/*
+ * TODO: Phy disable/diversity etc
+ */
+static int
+ath5k_config(struct ieee80211_hw *hw, u32 changed)
+{
+ struct ath5k_softc *sc = hw->priv;
+ struct ath5k_hw *ah = sc->ah;
+ struct ieee80211_conf *conf = &hw->conf;
+ int ret = 0;
+
+ mutex_lock(&sc->lock);
+
+ if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
+ ret = ath5k_chan_set(sc, conf->channel);
+ if (ret < 0)
+ goto unlock;
+ }
+
+ if ((changed & IEEE80211_CONF_CHANGE_POWER) &&
+ (sc->power_level != conf->power_level)) {
sc->power_level = conf->power_level;
/* Half dB steps */
ret = -EINVAL;
}
- mmiowb();
- mutex_unlock(&sc->lock);
- return ret;
-}
-
-static int
-ath5k_get_stats(struct ieee80211_hw *hw,
- struct ieee80211_low_level_stats *stats)
-{
- struct ath5k_softc *sc = hw->priv;
-
- /* Force update */
- ath5k_hw_update_mib_counters(sc->ah);
-
- stats->dot11ACKFailureCount = sc->stats.ack_fail;
- stats->dot11RTSFailureCount = sc->stats.rts_fail;
- stats->dot11RTSSuccessCount = sc->stats.rts_ok;
- stats->dot11FCSErrorCount = sc->stats.fcs_error;
-
- return 0;
-}
-
-static int ath5k_get_survey(struct ieee80211_hw *hw, int idx,
- struct survey_info *survey)
-{
- struct ath5k_softc *sc = hw->priv;
- struct ieee80211_conf *conf = &hw->conf;
-
- if (idx != 0)
- return -ENOENT;
+ mmiowb();
+ mutex_unlock(&sc->lock);
+ return ret;
+}
+
+static int
+ath5k_get_stats(struct ieee80211_hw *hw,
+ struct ieee80211_low_level_stats *stats)
+{
+ struct ath5k_softc *sc = hw->priv;
+
+ /* Force update */
+ ath5k_hw_update_mib_counters(sc->ah);
+
+ stats->dot11ACKFailureCount = sc->stats.ack_fail;
+ stats->dot11RTSFailureCount = sc->stats.rts_fail;
+ stats->dot11RTSSuccessCount = sc->stats.rts_ok;
+ stats->dot11FCSErrorCount = sc->stats.fcs_error;
+
+ return 0;
+}
+
+static int ath5k_get_survey(struct ieee80211_hw *hw, int idx,
+ struct survey_info *survey)
+{
+ struct ath5k_softc *sc = hw->priv;
+ struct ieee80211_conf *conf = &hw->conf;
+
+ if (idx != 0)
+ return -ENOENT;
+
+ survey->channel = conf->channel;
+ survey->filled = SURVEY_INFO_NOISE_DBM;
+ survey->noise = sc->ah->ah_noise_floor;
+
+ return 0;
+}
+
+static u64
+ath5k_get_tsf(struct ieee80211_hw *hw)
+{
+ struct ath5k_softc *sc = hw->priv;
+
+ return ath5k_hw_get_tsf64(sc->ah);
+}
+
+static void
+ath5k_set_tsf(struct ieee80211_hw *hw, u64 tsf)
+{
+ struct ath5k_softc *sc = hw->priv;
+
+ ath5k_hw_set_tsf64(sc->ah, tsf);
+}
+
+static void
+ath5k_reset_tsf(struct ieee80211_hw *hw)
+{
+ struct ath5k_softc *sc = hw->priv;
+
+ /*
+ * in IBSS mode we need to update the beacon timers too.
+ * this will also reset the TSF if we call it with 0
+ */
+ if (sc->opmode == NL80211_IFTYPE_ADHOC)
+ ath5k_beacon_update_timers(sc, 0);
+ else
+ ath5k_hw_reset_tsf(sc->ah);
+}
+
+static void
+set_beacon_filter(struct ieee80211_hw *hw, bool enable)
+{
+ struct ath5k_softc *sc = hw->priv;
+ struct ath5k_hw *ah = sc->ah;
+ u32 rfilt;
+ rfilt = ath5k_hw_get_rx_filter(ah);
+ if (enable)
+ rfilt |= AR5K_RX_FILTER_BEACON;
+ else
+ rfilt &= ~AR5K_RX_FILTER_BEACON;
+ ath5k_hw_set_rx_filter(ah, rfilt);
+ sc->filter_flags = rfilt;
+}
+
+static void ath5k_bss_info_changed(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct ieee80211_bss_conf *bss_conf,
+ u32 changes)
+{
+ struct ath5k_softc *sc = hw->priv;
+ struct ath5k_hw *ah = sc->ah;
+ struct ath_common *common = ath5k_hw_common(ah);
+ unsigned long flags;
+
+ mutex_lock(&sc->lock);
+ if (WARN_ON(sc->vif != vif))
+ goto unlock;
+
+ if (changes & BSS_CHANGED_BSSID) {
+ /* Cache for later use during resets */
+ memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
+ common->curaid = 0;
+ ath5k_hw_set_bssid(ah);
+ mmiowb();
+ }
+
+ if (changes & BSS_CHANGED_BEACON_INT)
+ sc->bintval = bss_conf->beacon_int;
+
+ if (changes & BSS_CHANGED_ASSOC) {
+ sc->assoc = bss_conf->assoc;
+ if (sc->opmode == NL80211_IFTYPE_STATION)
+ set_beacon_filter(hw, sc->assoc);
+ ath5k_hw_set_ledstate(sc->ah, sc->assoc ?
+ AR5K_LED_ASSOC : AR5K_LED_INIT);
+ if (bss_conf->assoc) {
+ ATH5K_DBG(sc, ATH5K_DEBUG_ANY,
+ "Bss Info ASSOC %d, bssid: %pM\n",
+ bss_conf->aid, common->curbssid);
+ common->curaid = bss_conf->aid;
+ ath5k_hw_set_bssid(ah);
+ /* Once ANI is available you would start it here */
+ }
+ }
+
+ if (changes & BSS_CHANGED_BEACON) {
+ spin_lock_irqsave(&sc->block, flags);
+ ath5k_beacon_update(hw, vif);
+ spin_unlock_irqrestore(&sc->block, flags);
+ }
+
+ if (changes & BSS_CHANGED_BEACON_ENABLED)
+ sc->enable_beacon = bss_conf->enable_beacon;
+
+ if (changes & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_ENABLED |
+ BSS_CHANGED_BEACON_INT))
+ ath5k_beacon_config(sc);
+
+ unlock:
+ mutex_unlock(&sc->lock);
+}
+
+static void ath5k_sw_scan_start(struct ieee80211_hw *hw)
+{
+ struct ath5k_softc *sc = hw->priv;
+ if (!sc->assoc)
+ ath5k_hw_set_ledstate(sc->ah, AR5K_LED_SCAN);
+}
+
+static void ath5k_sw_scan_complete(struct ieee80211_hw *hw)
+{
+ struct ath5k_softc *sc = hw->priv;
+ ath5k_hw_set_ledstate(sc->ah, sc->assoc ?
+ AR5K_LED_ASSOC : AR5K_LED_INIT);
+}
+
+/**
+ * ath5k_set_coverage_class - Set IEEE 802.11 coverage class
+ *
+ * @hw: struct ieee80211_hw pointer
+ * @coverage_class: IEEE 802.11 coverage class number
+ *
+ * Mac80211 callback. Sets slot time, ACK timeout and CTS timeout for given
+ * coverage class. The values are persistent, they are restored after device
+ * reset.
+ */
+static void ath5k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
+{
+ struct ath5k_softc *sc = hw->priv;
+
+ mutex_lock(&sc->lock);
+ ath5k_hw_set_coverage_class(sc->ah, coverage_class);
+ mutex_unlock(&sc->lock);
+}
+
+static const struct ieee80211_ops ath5k_hw_ops = {
+ .tx = ath5k_tx,
+ .start = ath5k_start,
+ .stop = ath5k_stop,
+ .add_interface = ath5k_add_interface,
+ .remove_interface = ath5k_remove_interface,
+ .config = ath5k_config,
+ .prepare_multicast = ath5k_prepare_multicast,
+ .configure_filter = ath5k_configure_filter,
+ .set_key = ath5k_set_key,
+ .get_stats = ath5k_get_stats,
+ .get_survey = ath5k_get_survey,
+ .conf_tx = NULL,
+ .get_tsf = ath5k_get_tsf,
+ .set_tsf = ath5k_set_tsf,
+ .reset_tsf = ath5k_reset_tsf,
+ .bss_info_changed = ath5k_bss_info_changed,
+ .sw_scan_start = ath5k_sw_scan_start,
+ .sw_scan_complete = ath5k_sw_scan_complete,
+ .set_coverage_class = ath5k_set_coverage_class,
+};
+
+/********************\
+* PCI Initialization *
+\********************/
+
+static int __devinit
+ath5k_pci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ void __iomem *mem;
+ struct ath5k_softc *sc;
+ struct ath_common *common;
+ struct ieee80211_hw *hw;
+ int ret;
+ u8 csz;
+
+ /*
+ * L0s needs to be disabled on all ath5k cards.
+ *
+ * For distributions shipping with CONFIG_PCIEASPM (this will be enabled
+ * by default in the future in 2.6.36) this will also mean both L1 and
+ * L0s will be disabled when a pre 1.1 PCIe device is detected. We do
+ * know L1 works correctly even for all ath5k pre 1.1 PCIe devices
+ * though but cannot currently undue the effect of a blacklist, for
+ * details you can read pcie_aspm_sanity_check() and see how it adjusts
+ * the device link capability.
+ *
+ * It may be possible in the future to implement some PCI API to allow
+ * drivers to override blacklists for pre 1.1 PCIe but for now it is
+ * best to accept that both L0s and L1 will be disabled completely for
+ * distributions shipping with CONFIG_PCIEASPM rather than having this
+ * issue present. Motivation for adding this new API will be to help
+ * with power consumption for some of these devices.
+ */
+ pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S);
+
+ ret = pci_enable_device(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "can't enable device\n");
+ goto err;
+ }
+
+ /* XXX 32-bit addressing only */
+ ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+ if (ret) {
+ dev_err(&pdev->dev, "32-bit DMA not available\n");
+ goto err_dis;
+ }
+
+ /*
+ * Cache line size is used to size and align various
+ * structures used to communicate with the hardware.
+ */
+ pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
+ if (csz == 0) {
+ /*
+ * Linux 2.4.18 (at least) writes the cache line size
+ * register as a 16-bit wide register which is wrong.
+ * We must have this setup properly for rx buffer
+ * DMA to work so force a reasonable value here if it
+ * comes up zero.
+ */
+ csz = L1_CACHE_BYTES >> 2;
+ pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
+ }
+ /*
+ * The default setting of latency timer yields poor results,
+ * set it to the value used by other systems. It may be worth
+ * tweaking this setting more.
+ */
+ pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
+
+ /* Enable bus mastering */
+ pci_set_master(pdev);
+
+ /*
+ * Disable the RETRY_TIMEOUT register (0x41) to keep
+ * PCI Tx retries from interfering with C3 CPU state.
+ */
+ pci_write_config_byte(pdev, 0x41, 0);
+
+ ret = pci_request_region(pdev, 0, "ath5k");
+ if (ret) {
+ dev_err(&pdev->dev, "cannot reserve PCI memory region\n");
+ goto err_dis;
+ }
+
+ mem = pci_iomap(pdev, 0, 0);
+ if (!mem) {
+ dev_err(&pdev->dev, "cannot remap PCI memory region\n") ;
+ ret = -EIO;
+ goto err_reg;
+ }
+
+ /*
+ * Allocate hw (mac80211 main struct)
+ * and hw->priv (driver private data)
+ */
+ hw = ieee80211_alloc_hw(sizeof(*sc), &ath5k_hw_ops);
+ if (hw == NULL) {
+ dev_err(&pdev->dev, "cannot allocate ieee80211_hw\n");
+ ret = -ENOMEM;
+ goto err_map;
+ }
+
+ dev_info(&pdev->dev, "registered as '%s'\n", wiphy_name(hw->wiphy));
+
+ /* Initialize driver private data */
+ SET_IEEE80211_DEV(hw, &pdev->dev);
+ hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
+ IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
+ IEEE80211_HW_SIGNAL_DBM;
+
+ hw->wiphy->interface_modes =
+ BIT(NL80211_IFTYPE_AP) |
+ BIT(NL80211_IFTYPE_STATION) |
+ BIT(NL80211_IFTYPE_ADHOC) |
+ BIT(NL80211_IFTYPE_MESH_POINT);
+
+ hw->extra_tx_headroom = 2;
+ hw->channel_change_time = 5000;
+ sc = hw->priv;
+ sc->hw = hw;
+ sc->pdev = pdev;
+
+ ath5k_debug_init_device(sc);
+
+ /*
+ * Mark the device as detached to avoid processing
+ * interrupts until setup is complete.
+ */
+ __set_bit(ATH_STAT_INVALID, sc->status);
+
+ sc->iobase = mem; /* So we can unmap it on detach */
+ sc->opmode = NL80211_IFTYPE_STATION;
+ sc->bintval = 1000;
+ mutex_init(&sc->lock);
+ spin_lock_init(&sc->rxbuflock);
+ spin_lock_init(&sc->txbuflock);
+ spin_lock_init(&sc->block);
+
+ /* Set private data */
+ pci_set_drvdata(pdev, sc);
+
+ /* Setup interrupt handler */
+ ret = request_irq(pdev->irq, ath5k_intr, IRQF_SHARED, "ath", sc);
+ if (ret) {
+ ATH5K_ERR(sc, "request_irq failed\n");
+ goto err_free;
+ }
+
+ /* If we passed the test, malloc an ath5k_hw struct */
+ sc->ah = kzalloc(sizeof(struct ath5k_hw), GFP_KERNEL);
+ if (!sc->ah) {
+ ret = -ENOMEM;
+ ATH5K_ERR(sc, "out of memory\n");
+ goto err_irq;
+ }
+
+ sc->ah->ah_sc = sc;
+ sc->ah->ah_iobase = sc->iobase;
+ common = ath5k_hw_common(sc->ah);
+ common->ops = &ath5k_common_ops;
+ common->ah = sc->ah;
+ common->hw = hw;
+ common->cachelsz = csz << 2; /* convert to bytes */
+
+ /* Initialize device */
+ ret = ath5k_hw_attach(sc);
+ if (ret) {
+ goto err_free_ah;
+ }
+
+ /* set up multi-rate retry capabilities */
+ if (sc->ah->ah_version == AR5K_AR5212) {
+ hw->max_rates = 4;
+ hw->max_rate_tries = 11;
+ }
+
+ /* Finish private driver data initialization */
+ ret = ath5k_attach(pdev, hw);
+ if (ret)
+ goto err_ah;
+
+ ATH5K_INFO(sc, "Atheros AR%s chip found (MAC: 0x%x, PHY: 0x%x)\n",
+ ath5k_chip_name(AR5K_VERSION_MAC, sc->ah->ah_mac_srev),
+ sc->ah->ah_mac_srev,
+ sc->ah->ah_phy_revision);
+
+ if (!sc->ah->ah_single_chip) {
+ /* Single chip radio (!RF5111) */
+ if (sc->ah->ah_radio_5ghz_revision &&
+ !sc->ah->ah_radio_2ghz_revision) {
+ /* No 5GHz support -> report 2GHz radio */
+ if (!test_bit(AR5K_MODE_11A,
+ sc->ah->ah_capabilities.cap_mode)) {
+ ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n",
+ ath5k_chip_name(AR5K_VERSION_RAD,
+ sc->ah->ah_radio_5ghz_revision),
+ sc->ah->ah_radio_5ghz_revision);
+ /* No 2GHz support (5110 and some
+ * 5Ghz only cards) -> report 5Ghz radio */
+ } else if (!test_bit(AR5K_MODE_11B,
+ sc->ah->ah_capabilities.cap_mode)) {
+ ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n",
+ ath5k_chip_name(AR5K_VERSION_RAD,
+ sc->ah->ah_radio_5ghz_revision),
+ sc->ah->ah_radio_5ghz_revision);
+ /* Multiband radio */
+ } else {
+ ATH5K_INFO(sc, "RF%s multiband radio found"
+ " (0x%x)\n",
+ ath5k_chip_name(AR5K_VERSION_RAD,
+ sc->ah->ah_radio_5ghz_revision),
+ sc->ah->ah_radio_5ghz_revision);
+ }
+ }
+ /* Multi chip radio (RF5111 - RF2111) ->
+ * report both 2GHz/5GHz radios */
+ else if (sc->ah->ah_radio_5ghz_revision &&
+ sc->ah->ah_radio_2ghz_revision){
+ ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n",
+ ath5k_chip_name(AR5K_VERSION_RAD,
+ sc->ah->ah_radio_5ghz_revision),
+ sc->ah->ah_radio_5ghz_revision);
+ ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n",
+ ath5k_chip_name(AR5K_VERSION_RAD,
+ sc->ah->ah_radio_2ghz_revision),
+ sc->ah->ah_radio_2ghz_revision);
+ }
+ }
+
- survey->channel = conf->channel;
- survey->filled = SURVEY_INFO_NOISE_DBM;
- survey->noise = sc->ah->ah_noise_floor;
+ /* ready to process interrupts */
+ __clear_bit(ATH_STAT_INVALID, sc->status);
return 0;
+err_ah:
+ ath5k_hw_detach(sc->ah);
+err_free_ah:
+ kfree(sc->ah);
+err_irq:
+ free_irq(pdev->irq, sc);
+err_free:
+ ieee80211_free_hw(hw);
+err_map:
+ pci_iounmap(pdev, mem);
+err_reg:
+ pci_release_region(pdev, 0);
+err_dis:
+ pci_disable_device(pdev);
+err:
+ return ret;
}
-static u64
-ath5k_get_tsf(struct ieee80211_hw *hw)
+static void __devexit
+ath5k_pci_remove(struct pci_dev *pdev)
{
- struct ath5k_softc *sc = hw->priv;
+ struct ath5k_softc *sc = pci_get_drvdata(pdev);
- return ath5k_hw_get_tsf64(sc->ah);
+ ath5k_debug_finish_device(sc);
+ ath5k_detach(pdev, sc->hw);
+ ath5k_hw_detach(sc->ah);
+ kfree(sc->ah);
+ free_irq(pdev->irq, sc);
+ pci_iounmap(pdev, sc->iobase);
+ pci_release_region(pdev, 0);
+ pci_disable_device(pdev);
+ ieee80211_free_hw(sc->hw);
}
-static void
-ath5k_set_tsf(struct ieee80211_hw *hw, u64 tsf)
+#ifdef CONFIG_PM_SLEEP
+static int ath5k_pci_suspend(struct device *dev)
{
- struct ath5k_softc *sc = hw->priv;
+ struct ath5k_softc *sc = pci_get_drvdata(to_pci_dev(dev));
- ath5k_hw_set_tsf64(sc->ah, tsf);
+ ath5k_led_off(sc);
+ return 0;
}
-static void
-ath5k_reset_tsf(struct ieee80211_hw *hw)
+static int ath5k_pci_resume(struct device *dev)
{
- struct ath5k_softc *sc = hw->priv;
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct ath5k_softc *sc = pci_get_drvdata(pdev);
/*
- * in IBSS mode we need to update the beacon timers too.
- * this will also reset the TSF if we call it with 0
+ * Suspend/Resume resets the PCI configuration space, so we have to
+ * re-disable the RETRY_TIMEOUT register (0x41) to keep
+ * PCI Tx retries from interfering with C3 CPU state
*/
- if (sc->opmode == NL80211_IFTYPE_ADHOC)
- ath5k_beacon_update_timers(sc, 0);
- else
- ath5k_hw_reset_tsf(sc->ah);
+ pci_write_config_byte(pdev, 0x41, 0);
+
+ ath5k_led_enable(sc);
+ return 0;
}
+static SIMPLE_DEV_PM_OPS(ath5k_pm_ops, ath5k_pci_suspend, ath5k_pci_resume);
+#define ATH5K_PM_OPS (&ath5k_pm_ops)
+#else
+#define ATH5K_PM_OPS NULL
+#endif /* CONFIG_PM_SLEEP */
+
+static struct pci_driver ath5k_pci_driver = {
+ .name = KBUILD_MODNAME,
+ .id_table = ath5k_pci_id_table,
+ .probe = ath5k_pci_probe,
+ .remove = __devexit_p(ath5k_pci_remove),
+ .driver.pm = ATH5K_PM_OPS,
+};
+
/*
- * Updates the beacon that is sent by ath5k_beacon_send. For adhoc,
- * this is called only once at config_bss time, for AP we do it every
- * SWBA interrupt so that the TIM will reflect buffered frames.
- *
- * Called with the beacon lock.
+ * Module init/exit functions
*/
-static int
-ath5k_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
+static int __init
+init_ath5k_pci(void)
{
int ret;
- struct ath5k_softc *sc = hw->priv;
- struct sk_buff *skb;
-
- if (WARN_ON(!vif)) {
- ret = -EINVAL;
- goto out;
- }
-
- skb = ieee80211_beacon_get(hw, vif);
-
- if (!skb) {
- ret = -ENOMEM;
- goto out;
- }
-
- ath5k_debug_dump_skb(sc, skb, "BC ", 1);
-
- ath5k_txbuf_free_skb(sc, sc->bbuf);
- sc->bbuf->skb = skb;
- ret = ath5k_beacon_setup(sc, sc->bbuf);
- if (ret)
- sc->bbuf->skb = NULL;
-out:
- return ret;
-}
-
-static void
-set_beacon_filter(struct ieee80211_hw *hw, bool enable)
-{
- struct ath5k_softc *sc = hw->priv;
- struct ath5k_hw *ah = sc->ah;
- u32 rfilt;
- rfilt = ath5k_hw_get_rx_filter(ah);
- if (enable)
- rfilt |= AR5K_RX_FILTER_BEACON;
- else
- rfilt &= ~AR5K_RX_FILTER_BEACON;
- ath5k_hw_set_rx_filter(ah, rfilt);
- sc->filter_flags = rfilt;
-}
-
-static void ath5k_bss_info_changed(struct ieee80211_hw *hw,
- struct ieee80211_vif *vif,
- struct ieee80211_bss_conf *bss_conf,
- u32 changes)
-{
- struct ath5k_softc *sc = hw->priv;
- struct ath5k_hw *ah = sc->ah;
- struct ath_common *common = ath5k_hw_common(ah);
- unsigned long flags;
-
- mutex_lock(&sc->lock);
- if (WARN_ON(sc->vif != vif))
- goto unlock;
-
- if (changes & BSS_CHANGED_BSSID) {
- /* Cache for later use during resets */
- memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
- common->curaid = 0;
- ath5k_hw_set_bssid(ah);
- mmiowb();
- }
-
- if (changes & BSS_CHANGED_BEACON_INT)
- sc->bintval = bss_conf->beacon_int;
- if (changes & BSS_CHANGED_ASSOC) {
- sc->assoc = bss_conf->assoc;
- if (sc->opmode == NL80211_IFTYPE_STATION)
- set_beacon_filter(hw, sc->assoc);
- ath5k_hw_set_ledstate(sc->ah, sc->assoc ?
- AR5K_LED_ASSOC : AR5K_LED_INIT);
- if (bss_conf->assoc) {
- ATH5K_DBG(sc, ATH5K_DEBUG_ANY,
- "Bss Info ASSOC %d, bssid: %pM\n",
- bss_conf->aid, common->curbssid);
- common->curaid = bss_conf->aid;
- ath5k_hw_set_bssid(ah);
- /* Once ANI is available you would start it here */
- }
- }
+ ath5k_debug_init();
- if (changes & BSS_CHANGED_BEACON) {
- spin_lock_irqsave(&sc->block, flags);
- ath5k_beacon_update(hw, vif);
- spin_unlock_irqrestore(&sc->block, flags);
+ ret = pci_register_driver(&ath5k_pci_driver);
+ if (ret) {
+ printk(KERN_ERR "ath5k_pci: can't register pci driver\n");
+ return ret;
}
- if (changes & BSS_CHANGED_BEACON_ENABLED)
- sc->enable_beacon = bss_conf->enable_beacon;
-
- if (changes & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_ENABLED |
- BSS_CHANGED_BEACON_INT))
- ath5k_beacon_config(sc);
-
- unlock:
- mutex_unlock(&sc->lock);
+ return 0;
}
-static void ath5k_sw_scan_start(struct ieee80211_hw *hw)
+static void __exit
+exit_ath5k_pci(void)
{
- struct ath5k_softc *sc = hw->priv;
- if (!sc->assoc)
- ath5k_hw_set_ledstate(sc->ah, AR5K_LED_SCAN);
-}
+ pci_unregister_driver(&ath5k_pci_driver);
-static void ath5k_sw_scan_complete(struct ieee80211_hw *hw)
-{
- struct ath5k_softc *sc = hw->priv;
- ath5k_hw_set_ledstate(sc->ah, sc->assoc ?
- AR5K_LED_ASSOC : AR5K_LED_INIT);
+ ath5k_debug_finish();
}
-/**
- * ath5k_set_coverage_class - Set IEEE 802.11 coverage class
- *
- * @hw: struct ieee80211_hw pointer
- * @coverage_class: IEEE 802.11 coverage class number
- *
- * Mac80211 callback. Sets slot time, ACK timeout and CTS timeout for given
- * coverage class. The values are persistent, they are restored after device
- * reset.
- */
-static void ath5k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
-{
- struct ath5k_softc *sc = hw->priv;
-
- mutex_lock(&sc->lock);
- ath5k_hw_set_coverage_class(sc->ah, coverage_class);
- mutex_unlock(&sc->lock);
-}
+module_init(init_ath5k_pci);
+module_exit(exit_ath5k_pci);
projects / platform / kernel / linux-exynos.git / commitdiff