#include <linux/io.h>
#include <linux/netdevice.h>
#include <linux/cache.h>
-#include <linux/pci.h>
-#include <linux/pci-aspm.h>
#include <linux/ethtool.h>
#include <linux/uaccess.h>
#include <linux/slab.h>
+#include <linux/etherdevice.h>
#include <net/ieee80211_radiotap.h>
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_DESCRIPTION("Support for 5xxx series of Atheros 802.11 wireless LAN cards.");
MODULE_SUPPORTED_DEVICE("Atheros 5xxx WLAN cards");
MODULE_LICENSE("Dual BSD/GPL");
-MODULE_VERSION("0.6.0 (EXPERIMENTAL)");
-
-
-/* Known PCI ids */
-static DEFINE_PCI_DEVICE_TABLE(ath5k_pci_id_table) = {
- { PCI_VDEVICE(ATHEROS, 0x0207) }, /* 5210 early */
- { PCI_VDEVICE(ATHEROS, 0x0007) }, /* 5210 */
- { PCI_VDEVICE(ATHEROS, 0x0011) }, /* 5311 - this is on AHB bus !*/
- { PCI_VDEVICE(ATHEROS, 0x0012) }, /* 5211 */
- { PCI_VDEVICE(ATHEROS, 0x0013) }, /* 5212 */
- { PCI_VDEVICE(3COM_2, 0x0013) }, /* 3com 5212 */
- { PCI_VDEVICE(3COM, 0x0013) }, /* 3com 3CRDAG675 5212 */
- { PCI_VDEVICE(ATHEROS, 0x1014) }, /* IBM minipci 5212 */
- { PCI_VDEVICE(ATHEROS, 0x0014) }, /* 5212 combatible */
- { PCI_VDEVICE(ATHEROS, 0x0015) }, /* 5212 combatible */
- { PCI_VDEVICE(ATHEROS, 0x0016) }, /* 5212 combatible */
- { PCI_VDEVICE(ATHEROS, 0x0017) }, /* 5212 combatible */
- { PCI_VDEVICE(ATHEROS, 0x0018) }, /* 5212 combatible */
- { PCI_VDEVICE(ATHEROS, 0x0019) }, /* 5212 combatible */
- { PCI_VDEVICE(ATHEROS, 0x001a) }, /* 2413 Griffin-lite */
- { PCI_VDEVICE(ATHEROS, 0x001b) }, /* 5413 Eagle */
- { PCI_VDEVICE(ATHEROS, 0x001c) }, /* PCI-E cards */
- { PCI_VDEVICE(ATHEROS, 0x001d) }, /* 2417 Nala */
- { 0 }
-};
-MODULE_DEVICE_TABLE(pci, ath5k_pci_id_table);
+
+static int ath5k_init(struct ieee80211_hw *hw);
+static int ath5k_reset(struct ath5k_softc *sc, struct ieee80211_channel *chan,
+ bool skip_pcu);
+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 SREVs */
static const struct ath5k_srev_name srev_names[] = {
+#ifdef CONFIG_ATHEROS_AR231X
+ { "5312", AR5K_VERSION_MAC, AR5K_SREV_AR5312_R2 },
+ { "5312", AR5K_VERSION_MAC, AR5K_SREV_AR5312_R7 },
+ { "2313", AR5K_VERSION_MAC, AR5K_SREV_AR2313_R8 },
+ { "2315", AR5K_VERSION_MAC, AR5K_SREV_AR2315_R6 },
+ { "2315", AR5K_VERSION_MAC, AR5K_SREV_AR2315_R7 },
+ { "2317", AR5K_VERSION_MAC, AR5K_SREV_AR2317_R1 },
+ { "2317", AR5K_VERSION_MAC, AR5K_SREV_AR2317_R2 },
+#else
{ "5210", AR5K_VERSION_MAC, AR5K_SREV_AR5210 },
{ "5311", AR5K_VERSION_MAC, AR5K_SREV_AR5311 },
{ "5311A", AR5K_VERSION_MAC, AR5K_SREV_AR5311A },
{ "5418", AR5K_VERSION_MAC, AR5K_SREV_AR5418 },
{ "2425", AR5K_VERSION_MAC, AR5K_SREV_AR2425 },
{ "2417", AR5K_VERSION_MAC, AR5K_SREV_AR2417 },
+#endif
{ "xxxxx", AR5K_VERSION_MAC, AR5K_SREV_UNKNOWN },
{ "5110", AR5K_VERSION_RAD, AR5K_SREV_RAD_5110 },
{ "5111", AR5K_VERSION_RAD, AR5K_SREV_RAD_5111 },
{ "2112B", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112B },
{ "2413", AR5K_VERSION_RAD, AR5K_SREV_RAD_2413 },
{ "5413", AR5K_VERSION_RAD, AR5K_SREV_RAD_5413 },
- { "2316", AR5K_VERSION_RAD, AR5K_SREV_RAD_2316 },
- { "2317", AR5K_VERSION_RAD, AR5K_SREV_RAD_2317 },
{ "5424", AR5K_VERSION_RAD, AR5K_SREV_RAD_5424 },
{ "5133", AR5K_VERSION_RAD, AR5K_SREV_RAD_5133 },
+#ifdef CONFIG_ATHEROS_AR231X
+ { "2316", AR5K_VERSION_RAD, AR5K_SREV_RAD_2316 },
+ { "2317", AR5K_VERSION_RAD, AR5K_SREV_RAD_2317 },
+#endif
{ "xxxxx", AR5K_VERSION_RAD, AR5K_SREV_UNKNOWN },
};
/* 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)
{
BUG_ON(!bf);
if (!bf->skb)
return;
- pci_unmap_single(sc->pdev, bf->skbaddr, bf->skb->len,
- PCI_DMA_TODEVICE);
+ dma_unmap_single(sc->dev, bf->skbaddr, bf->skb->len,
+ DMA_TO_DEVICE);
dev_kfree_skb_any(bf->skb);
bf->skb = NULL;
bf->skbaddr = 0;
BUG_ON(!bf);
if (!bf->skb)
return;
- pci_unmap_single(sc->pdev, bf->skbaddr, common->rx_bufsize,
- PCI_DMA_FROMDEVICE);
+ dma_unmap_single(sc->dev, bf->skbaddr, common->rx_bufsize,
+ DMA_FROM_DEVICE);
dev_kfree_skb_any(bf->skb);
bf->skb = NULL;
bf->skbaddr = 0;
}
-/* 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 *
+const char *
ath5k_chip_name(enum ath5k_srev_type type, u_int16_t val)
{
const char *name = "xxxxx";
.write = ath5k_iowrite32,
};
-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);
+/***********************\
+* Driver Initialization *
+\***********************/
- ret = pci_enable_device(pdev);
- if (ret) {
- dev_err(&pdev->dev, "can't enable device\n");
- goto err;
- }
+static int ath5k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
+{
+ struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
+ struct ath5k_softc *sc = hw->priv;
+ struct ath_regulatory *regulatory = ath5k_hw_regulatory(sc->ah);
- /* 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;
- }
+ return ath_reg_notifier_apply(wiphy, request, regulatory);
+}
- /*
- * 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);
+/********************\
+* Channel/mode setup *
+\********************/
- /* Enable bus mastering */
- pci_set_master(pdev);
+/*
+ * 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;
+}
- /*
- * Disable the RETRY_TIMEOUT register (0x41) to keep
- * PCI Tx retries from interfering with C3 CPU state.
- */
- pci_write_config_byte(pdev, 0x41, 0);
+/*
+ * 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));
+}
- ret = pci_request_region(pdev, 0, "ath5k");
- if (ret) {
- dev_err(&pdev->dev, "cannot reserve PCI memory region\n");
- goto err_dis;
- }
+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;
- mem = pci_iomap(pdev, 0, 0);
- if (!mem) {
- dev_err(&pdev->dev, "cannot remap PCI memory region\n") ;
- ret = -EIO;
- goto err_reg;
- }
+ if (!test_bit(mode, ah->ah_modes))
+ return 0;
- /*
- * 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;
+ switch (mode) {
+ case AR5K_MODE_11A:
+ /* 1..220, but 2GHz frequencies are filtered by check_channel */
+ size = 220 ;
+ chfreq = CHANNEL_5GHZ;
+ break;
+ case AR5K_MODE_11B:
+ case AR5K_MODE_11G:
+ size = 26;
+ chfreq = CHANNEL_2GHZ;
+ break;
+ default:
+ ATH5K_WARN(ah->ah_sc, "bad mode, not copying channels\n");
+ return 0;
}
- dev_info(&pdev->dev, "registered as '%s'\n", wiphy_name(hw->wiphy));
+ for (i = 0, count = 0; i < size && max > 0; i++) {
+ ch = i + 1 ;
+ freq = ath5k_ieee2mhz(ch);
- /* 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_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 a 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_irq:
- free_irq(pdev->irq, sc);
-err_free_ah:
- kfree(sc->ah);
-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)
+/*
+ * 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)
{
- struct pci_dev *pdev = to_pci_dev(dev);
- struct ath5k_softc *sc = pci_get_drvdata(pdev);
+ 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, true);
}
-#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)
+struct ath_vif_iter_data {
+ const u8 *hw_macaddr;
+ u8 mask[ETH_ALEN];
+ u8 active_mac[ETH_ALEN]; /* first active MAC */
+ bool need_set_hw_addr;
+ bool found_active;
+ bool any_assoc;
+ enum nl80211_iftype opmode;
+};
+
+static void ath_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
{
- 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;
+ struct ath_vif_iter_data *iter_data = data;
+ int i;
+ struct ath5k_vif *avf = (void *)vif->drv_priv;
- ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "devid 0x%x\n", pdev->device);
+ if (iter_data->hw_macaddr)
+ for (i = 0; i < ETH_ALEN; i++)
+ iter_data->mask[i] &=
+ ~(iter_data->hw_macaddr[i] ^ mac[i]);
- /*
- * Check if the MAC has multi-rate retry support.
- * We do this by trying to setup a fake extended
- * descriptor. MAC's that don't have support will
- * return false w/o doing anything. MAC's 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 (!iter_data->found_active) {
+ iter_data->found_active = true;
+ memcpy(iter_data->active_mac, mac, ETH_ALEN);
+ }
- if (ret < 0)
- goto err;
- if (ret > 0)
- __set_bit(ATH_STAT_MRRETRY, sc->status);
+ if (iter_data->need_set_hw_addr && iter_data->hw_macaddr)
+ if (compare_ether_addr(iter_data->hw_macaddr, mac) == 0)
+ iter_data->need_set_hw_addr = false;
- /*
- * 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;
+ if (!iter_data->any_assoc) {
+ if (avf->assoc)
+ iter_data->any_assoc = true;
}
- /* NB: setup here so ath5k_rate_update is happy */
- if (test_bit(AR5K_MODE_11A, ah->ah_modes))
- ath5k_setcurmode(sc, AR5K_MODE_11A);
+ /* Calculate combined mode - when APs are active, operate in AP mode.
+ * Otherwise use the mode of the new interface. This can currently
+ * only deal with combinations of APs and STAs. Only one ad-hoc
+ * interfaces is allowed.
+ */
+ if (avf->opmode == NL80211_IFTYPE_AP)
+ iter_data->opmode = NL80211_IFTYPE_AP;
else
- ath5k_setcurmode(sc, AR5K_MODE_11B);
+ if (iter_data->opmode == NL80211_IFTYPE_UNSPECIFIED)
+ iter_data->opmode = avf->opmode;
+}
- /*
- * 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;
- }
+static void ath5k_update_bssid_mask_and_opmode(struct ath5k_softc *sc,
+ struct ieee80211_vif *vif)
+{
+ struct ath_common *common = ath5k_hw_common(sc->ah);
+ struct ath_vif_iter_data iter_data;
/*
- * Allocate hardware transmit queues: one queue for
- * beacon frames and one data queue for each QoS
- * priority. Note that hw functions handle reseting
- * these queues at the needed time.
+ * Use the hardware MAC address as reference, the hardware uses it
+ * together with the BSSID mask when matching addresses.
*/
- 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;
- }
+ iter_data.hw_macaddr = common->macaddr;
+ memset(&iter_data.mask, 0xff, ETH_ALEN);
+ iter_data.found_active = false;
+ iter_data.need_set_hw_addr = true;
+ iter_data.opmode = NL80211_IFTYPE_UNSPECIFIED;
- 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 (vif)
+ ath_vif_iter(&iter_data, vif->addr, vif);
- 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);
+ /* Get list of all active MAC addresses */
+ ieee80211_iterate_active_interfaces_atomic(sc->hw, ath_vif_iter,
+ &iter_data);
+ memcpy(sc->bssidmask, iter_data.mask, ETH_ALEN);
- INIT_WORK(&sc->reset_work, ath5k_reset_work);
+ sc->opmode = iter_data.opmode;
+ if (sc->opmode == NL80211_IFTYPE_UNSPECIFIED)
+ /* Nothing active, default to station mode */
+ sc->opmode = NL80211_IFTYPE_STATION;
- 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;
- }
+ ath5k_hw_set_opmode(sc->ah, sc->opmode);
+ ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "mode setup opmode %d (%s)\n",
+ sc->opmode, ath_opmode_to_string(sc->opmode));
- 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);
+ if (iter_data.need_set_hw_addr && iter_data.found_active)
+ ath5k_hw_set_lladdr(sc->ah, iter_data.active_mac);
- 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 (ath5k_hw_hasbssidmask(sc->ah))
+ ath5k_hw_set_bssid_mask(sc->ah, sc->bssidmask);
+}
- ret = ieee80211_register_hw(hw);
- if (ret) {
- ATH5K_ERR(sc, "can't register ieee80211 hw\n");
- goto err_queues;
- }
+static void
+ath5k_mode_setup(struct ath5k_softc *sc, struct ieee80211_vif *vif)
+{
+ struct ath5k_hw *ah = sc->ah;
+ u32 rfilt;
- if (!ath_is_world_regd(regulatory))
- regulatory_hint(hw->wiphy, regulatory->alpha2);
+ /* configure rx filter */
+ rfilt = sc->filter_flags;
+ ath5k_hw_set_rx_filter(ah, rfilt);
+ ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "RX filter 0x%x\n", rfilt);
- 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;
+ ath5k_update_bssid_mask_and_opmode(sc, vif);
}
-static void
-ath5k_detach(struct pci_dev *pdev, struct ieee80211_hw *hw)
+static inline int
+ath5k_hw_to_driver_rix(struct ath5k_softc *sc, int hw_rix)
{
- struct ath5k_softc *sc = hw->priv;
-
- /*
- * NB: the order of these is important:
- * o call the 802.11 layer before detaching ath5k_hw to
- * insure 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.
- */
-}
-
-
+ int rix;
+ /* 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;
-/********************\
-* Channel/mode setup *
-\********************/
+ rix = sc->rate_idx[sc->curband->band][hw_rix];
+ if (WARN(rix < 0, "invalid hw_rix: %x\n", hw_rix))
+ rix = 0;
-/*
- * 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;
+ return rix;
}
-/*
- * 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));
-}
+/***************\
+* Buffers setup *
+\***************/
-static unsigned int
-ath5k_copy_channels(struct ath5k_hw *ah,
- struct ieee80211_channel *channels,
- unsigned int mode,
- unsigned int max)
+static
+struct sk_buff *ath5k_rx_skb_alloc(struct ath5k_softc *sc, dma_addr_t *skb_addr)
{
- unsigned int i, count, size, chfreq, freq, ch;
+ struct ath_common *common = ath5k_hw_common(sc->ah);
+ struct sk_buff *skb;
- if (!test_bit(mode, ah->ah_modes))
- return 0;
+ /*
+ * Allocate buffer with headroom_needed space for the
+ * fake physical layer header at the start.
+ */
+ skb = ath_rxbuf_alloc(common,
+ common->rx_bufsize,
+ GFP_ATOMIC);
- 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;
+ if (!skb) {
+ ATH5K_ERR(sc, "can't alloc skbuff of size %u\n",
+ common->rx_bufsize);
+ return NULL;
}
- for (i = 0, count = 0; i < size && max > 0; i++) {
- ch = i + 1 ;
- freq = ath5k_ieee2mhz(ch);
+ *skb_addr = dma_map_single(sc->dev,
+ skb->data, common->rx_bufsize,
+ DMA_FROM_DEVICE);
- /* Check if channel is supported by the chipset */
- if (!ath5k_channel_ok(ah, freq, chfreq))
- continue;
+ if (unlikely(dma_mapping_error(sc->dev, *skb_addr))) {
+ ATH5K_ERR(sc, "%s: DMA mapping failed\n", __func__);
+ dev_kfree_skb(skb);
+ return NULL;
+ }
+ return skb;
+}
- if (!modparam_all_channels && !ath5k_is_standard_channel(ch))
- continue;
+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;
- /* 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;
- }
+ if (!skb) {
+ skb = ath5k_rx_skb_alloc(sc, &bf->skbaddr);
+ if (!skb)
+ return -ENOMEM;
+ bf->skb = skb;
+ }
- count++;
- max--;
+ /*
+ * 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;
}
- return count;
+ if (sc->rxlink != NULL)
+ *sc->rxlink = bf->daddr;
+ sc->rxlink = &ds->ds_link;
+ return 0;
}
-static void
-ath5k_setup_rate_idx(struct ath5k_softc *sc, struct ieee80211_supported_band *b)
+static enum ath5k_pkt_type get_hw_packet_type(struct sk_buff *skb)
{
- u8 i;
+ struct ieee80211_hdr *hdr;
+ enum ath5k_pkt_type htype;
+ __le16 fc;
- for (i = 0; i < AR5K_MAX_RATES; i++)
- sc->rate_idx[b->band][i] = -1;
+ hdr = (struct ieee80211_hdr *)skb->data;
+ fc = hdr->frame_control;
- 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 (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;
}
static int
-ath5k_setup_bands(struct ieee80211_hw *hw)
+ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf,
+ struct ath5k_txq *txq, int padsize)
{
- 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 = 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;
- /* 2GHz band */
- sband = &sc->sbands[IEEE80211_BAND_2GHZ];
- sband->band = IEEE80211_BAND_2GHZ;
- sband->bitrates = &sc->rates[IEEE80211_BAND_2GHZ][0];
+ flags = AR5K_TXDESC_INTREQ | AR5K_TXDESC_CLRDMASK;
- 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;
+ /* XXX endianness */
+ bf->skbaddr = dma_map_single(sc->dev, skb->data, skb->len,
+ DMA_TO_DEVICE);
- 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);
-
- hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
- count_c = sband->n_channels;
- max_c -= count_c;
- }
- 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];
-
- memcpy(sband->bitrates, &ath5k_rates[4],
- sizeof(struct ieee80211_rate) * 8);
- sband->n_bitrates = 8;
-
- sband->channels = &sc->channels[count_c];
- sband->n_channels = ath5k_copy_channels(ah, sband->channels,
- AR5K_MODE_11A, max_c);
-
- hw->wiphy->bands[IEEE80211_BAND_5GHZ] = sband;
- }
- ath5k_setup_rate_idx(sc, sband);
-
- ath5k_debug_dump_bands(sc);
-
- return 0;
-}
-
-/*
- * 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);
-
- /*
- * 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.
- */
- return ath5k_reset(sc, chan);
-}
-
-static void
-ath5k_setcurmode(struct ath5k_softc *sc, unsigned int mode)
-{
- sc->curmode = mode;
-
- if (mode == AR5K_MODE_11A) {
- sc->curband = &sc->sbands[IEEE80211_BAND_5GHZ];
- } else {
- sc->curband = &sc->sbands[IEEE80211_BAND_2GHZ];
- }
-}
-
-static void
-ath5k_mode_setup(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);
-
- if (ath5k_hw_hasbssidmask(ah))
- ath5k_hw_set_bssid_mask(ah, sc->bssidmask);
-
- /* configure operational mode */
- ath5k_hw_set_opmode(ah, sc->opmode);
-
- 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);
-}
-
-static inline int
-ath5k_hw_to_driver_rix(struct ath5k_softc *sc, int hw_rix)
-{
- int rix;
-
- /* 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 buffer with headroom_needed space for the
- * fake physical layer header at the start.
- */
- skb = ath_rxbuf_alloc(common,
- common->rx_bufsize,
- GFP_ATOMIC);
-
- if (!skb) {
- ATH5K_ERR(sc, "can't alloc skbuff of size %u\n",
- common->rx_bufsize);
- return NULL;
- }
-
- *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;
-}
-
-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;
-
- if (!skb) {
- skb = ath5k_rx_skb_alloc(sc, &bf->skbaddr);
- if (!skb)
- return -ENOMEM;
- bf->skb = skb;
- }
-
- /*
- * 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;
- }
-
- if (sc->rxlink != NULL)
- *sc->rxlink = bf->daddr;
- sc->rxlink = &ds->ds_link;
- return 0;
-}
-
-static enum ath5k_pkt_type get_hw_packet_type(struct sk_buff *skb)
-{
- struct ieee80211_hdr *hdr;
- enum ath5k_pkt_type htype;
- __le16 fc;
-
- hdr = (struct ieee80211_hdr *)skb->data;
- fc = hdr->frame_control;
-
- 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;
-}
-
-static int
-ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf,
- struct ath5k_txq *txq, int padsize)
-{
- 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 (!rate) {
- ret = -EINVAL;
- goto err_unmap;
- }
+ rate = ieee80211_get_tx_rate(sc->hw, info);
+ if (!rate) {
+ ret = -EINVAL;
+ goto err_unmap;
+ }
if (info->flags & IEEE80211_TX_CTL_NO_ACK)
flags |= AR5K_TXDESC_NOACK;
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));
+ info->control.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));
+ info->control.vif, pktlen, info));
}
ret = ah->ah_setup_tx_desc(ah, ds, pktlen,
ieee80211_get_hdrlen_from_skb(skb), padsize,
spin_lock_bh(&txq->lock);
list_add_tail(&bf->list, &txq->q);
+ txq->txq_len++;
if (txq->link == NULL) /* is this first packet? */
ath5k_hw_set_txdp(ah, txq->qnum, bf->daddr);
else /* no, so only link it */
return 0;
err_unmap:
- pci_unmap_single(sc->pdev, bf->skbaddr, skb->len, PCI_DMA_TODEVICE);
+ dma_unmap_single(sc->dev, bf->skbaddr, skb->len, DMA_TO_DEVICE);
return ret;
}
\*******************/
static int
-ath5k_desc_alloc(struct ath5k_softc *sc, struct pci_dev *pdev)
+ath5k_desc_alloc(struct ath5k_softc *sc)
{
struct ath5k_desc *ds;
struct ath5k_buf *bf;
/* 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);
+
+ sc->desc = dma_alloc_coherent(sc->dev, sc->desc_len,
+ &sc->desc_daddr, GFP_KERNEL);
if (sc->desc == NULL) {
ATH5K_ERR(sc, "can't allocate descriptors\n");
ret = -ENOMEM;
list_add_tail(&bf->list, &sc->txbuf);
}
- /* beacon buffer */
- bf->desc = ds;
- bf->daddr = da;
- sc->bbuf = bf;
+ /* beacon buffers */
+ INIT_LIST_HEAD(&sc->bcbuf);
+ for (i = 0; i < ATH_BCBUF; i++, bf++, ds++, da += sizeof(*ds)) {
+ bf->desc = ds;
+ bf->daddr = da;
+ list_add_tail(&bf->list, &sc->bcbuf);
+ }
return 0;
err_free:
- pci_free_consistent(pdev, sc->desc_len, sc->desc, sc->desc_daddr);
+ dma_free_coherent(sc->dev, 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_desc_free(struct ath5k_softc *sc)
{
struct ath5k_buf *bf;
- 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);
+ list_for_each_entry(bf, &sc->bcbuf, list)
+ ath5k_txbuf_free_skb(sc, bf);
/* Free memory associated with all descriptors */
- pci_free_consistent(pdev, sc->desc_len, sc->desc, sc->desc_daddr);
+ dma_free_coherent(sc->dev, sc->desc_len, sc->desc, sc->desc_daddr);
sc->desc = NULL;
sc->desc_daddr = 0;
kfree(sc->bufptr);
sc->bufptr = NULL;
- sc->bbuf = NULL;
}
-
-
-
/**************\
* Queues setup *
\**************/
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
+ /* XXX: default values not correct for B and XR channels,
+ * but who cares? */
+ .tqi_aifs = AR5K_TUNE_AIFS,
+ .tqi_cw_min = AR5K_TUNE_CWMIN,
+ .tqi_cw_max = AR5K_TUNE_CWMAX
};
int qnum;
/*
* Enable interrupts only for EOL and DESC conditions.
* We mark tx descriptors to receive a DESC interrupt
- * when a tx queue gets deep; otherwise waiting for the
+ * 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
INIT_LIST_HEAD(&txq->q);
spin_lock_init(&txq->lock);
txq->setup = true;
+ txq->txq_len = 0;
+ txq->txq_poll_mark = false;
+ txq->txq_stuck = 0;
}
return &sc->txqs[qnum];
}
ath5k_beaconq_setup(struct ath5k_hw *ah)
{
struct ath5k_txq_info qi = {
- .tqi_aifs = AR5K_TXQ_USEDEFAULT,
- .tqi_cw_min = AR5K_TXQ_USEDEFAULT,
- .tqi_cw_max = AR5K_TXQ_USEDEFAULT,
+ /* XXX: default values not correct for B and XR channels,
+ * but who cares? */
+ .tqi_aifs = AR5K_TUNE_AIFS,
+ .tqi_cw_min = AR5K_TUNE_CWMIN,
+ .tqi_cw_max = AR5K_TUNE_CWMAX,
/* NB: for dynamic turbo, don't enable any other interrupts */
.tqi_flags = AR5K_TXQ_FLAG_TXDESCINT_ENABLE
};
*/
qi.tqi_aifs = 0;
qi.tqi_cw_min = 0;
- qi.tqi_cw_max = 2 * ah->ah_cw_min;
+ qi.tqi_cw_max = 2 * AR5K_TUNE_CWMIN;
}
ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
return ret;
}
-static void
-ath5k_txq_drainq(struct ath5k_softc *sc, struct ath5k_txq *txq)
+/**
+ * ath5k_drain_tx_buffs - Empty tx buffers
+ *
+ * @sc The &struct ath5k_softc
+ *
+ * Empty tx buffers from all queues in preparation
+ * of a reset or during shutdown.
+ *
+ * NB: this assumes output has been stopped and
+ * we do not need to block ath5k_tx_tasklet
+ */
+static void
+ath5k_drain_tx_buffs(struct ath5k_softc *sc)
{
+ struct ath5k_txq *txq;
struct ath5k_buf *bf, *bf0;
+ int i;
- /*
- * NB: this assumes output has been stopped and
- * we do not need to block ath5k_tx_tasklet
- */
- 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);
-
- 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);
-}
+ for (i = 0; i < ARRAY_SIZE(sc->txqs); i++) {
+ if (sc->txqs[i].setup) {
+ txq = &sc->txqs[i];
+ spin_lock_bh(&txq->lock);
+ list_for_each_entry_safe(bf, bf0, &txq->q, list) {
+ ath5k_debug_printtxbuf(sc, bf);
-/*
- * 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;
+ ath5k_txbuf_free_skb(sc, bf);
- /* 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);
+ spin_lock_bh(&sc->txbuflock);
+ list_move_tail(&bf->list, &sc->txbuf);
+ sc->txbuf_len++;
+ txq->txq_len--;
+ spin_unlock_bh(&sc->txbuflock);
}
+ txq->link = NULL;
+ txq->txq_poll_mark = false;
+ spin_unlock_bh(&txq->lock);
+ }
}
-
- for (i = 0; i < ARRAY_SIZE(sc->txqs); i++)
- if (sc->txqs[i].setup)
- ath5k_txq_drainq(sc, &sc->txqs[i]);
}
static void
}
-
-
/*************\
* RX Handling *
\*************/
struct ath5k_buf *bf;
int ret;
- common->rx_bufsize = roundup(IEEE80211_MAX_LEN, common->cachelsz);
+ 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);
spin_unlock_bh(&sc->rxbuflock);
ath5k_hw_start_rx_dma(ah); /* enable recv descriptors */
- ath5k_mode_setup(sc); /* set filters, etc. */
+ ath5k_mode_setup(sc, NULL); /* set filters, etc. */
ath5k_hw_start_rx_pcu(ah); /* re-enable PCU/DMA engine */
return 0;
}
/*
- * Disable the receive h/w in preparation for a reset.
+ * Disable the receive logic on PCU (DRU)
+ * In preparation for a shutdown.
+ *
+ * Note: Doesn't stop rx DMA, ath5k_hw_dma_stop
+ * does.
*/
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_hw_stop_rx_pcu(ah); /* disable PCU */
ath5k_debug_printrxbuffs(sc, ah);
}
*/
if (hw_tu >= sc->nexttbtt)
ath5k_beacon_update_timers(sc, bc_tstamp);
+
+ /* Check if the beacon timers are still correct, because a TSF
+ * update might have created a window between them - for a
+ * longer description see the comment of this function: */
+ if (!ath5k_hw_check_beacon_timers(sc->ah, sc->bintval)) {
+ ath5k_beacon_update_timers(sc, bc_tstamp);
+ ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
+ "fixed beacon timers after beacon receive\n");
+ }
}
}
memcmp(mgmt->bssid, common->curbssid, ETH_ALEN) != 0)
return;
- ah->ah_beacon_rssi_avg = ath5k_moving_average(ah->ah_beacon_rssi_avg,
- rssi);
+ ewma_add(&ah->ah_beacon_rssi_avg, rssi);
/* in IBSS mode we should keep RSSI statistics per neighbour */
/* le16_to_cpu(mgmt->u.beacon.capab_info) & WLAN_CAPABILITY_IBSS */
}
/*
- * Compute padding position. skb must contains an IEEE 802.11 frame
+ * Compute padding position. skb must contain an IEEE 802.11 frame
*/
static int ath5k_common_padpos(struct sk_buff *skb)
{
}
/*
- * This function expects a 802.11 frame and returns the number of
- * bytes added, or -1 if we don't have enought header room.
+ * 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)
{
int padpos = ath5k_common_padpos(skb);
}
/*
- * This function expects a 802.11 frame and returns the number of
- * bytes removed
+ * 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);
{
struct ieee80211_rx_status *rxs;
- /* 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 % 4) % 4; However, since only
- * even-length headers are used, padding can only be 0 or 2
- * bytes and we can optimize this a bit. In addition, we must
- * not try to remove padding from short control frames that do
- * not have payload. */
ath5k_remove_padding(skb);
rxs = IEEE80211_SKB_RXCB(skb);
ath5k_receive_frame_ok(struct ath5k_softc *sc, struct ath5k_rx_status *rs)
{
sc->stats.rx_all_count++;
+ sc->stats.rx_bytes_count += rs->rs_datalen;
if (unlikely(rs->rs_status)) {
if (rs->rs_status & AR5K_RXERR_CRC)
return true;
}
- /* let crypto-error packets fall through in MNTR */
- if ((rs->rs_status & ~(AR5K_RXERR_DECRYPT|AR5K_RXERR_MIC)) ||
- sc->opmode != NL80211_IFTYPE_MONITOR)
+ /* reject any frames with non-crypto errors */
+ if (rs->rs_status & ~(AR5K_RXERR_DECRYPT))
return false;
}
if (!next_skb)
goto next;
- pci_unmap_single(sc->pdev, bf->skbaddr,
+ dma_unmap_single(sc->dev, bf->skbaddr,
common->rx_bufsize,
- PCI_DMA_FROMDEVICE);
+ DMA_FROM_DEVICE);
skb_put(skb, rs.rs_datalen);
* TX Handling *
\*************/
+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;
+
+ ath5k_debug_dump_skb(sc, skb, "TX ", 1);
+
+ /*
+ * 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 (txq->txq_len >= ATH5K_TXQ_LEN_MAX)
+ ieee80211_stop_queue(hw, txq->qnum);
+
+ 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_queues(hw);
+ 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);
+
+ 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;
+
+drop_packet:
+ dev_kfree_skb_any(skb);
+ return NETDEV_TX_OK;
+}
+
+static void
+ath5k_tx_frame_completed(struct ath5k_softc *sc, struct sk_buff *skb,
+ struct ath5k_tx_status *ts)
+{
+ struct ieee80211_tx_info *info;
+ int i;
+
+ sc->stats.tx_all_count++;
+ sc->stats.tx_bytes_count += skb->len;
+ info = IEEE80211_SKB_CB(skb);
+
+ ieee80211_tx_info_clear_status(info);
+ for (i = 0; i < 4; i++) {
+ struct ieee80211_tx_rate *r =
+ &info->status.rates[i];
+
+ if (ts->ts_rate[i]) {
+ r->idx = ath5k_hw_to_driver_rix(sc, ts->ts_rate[i]);
+ r->count = ts->ts_retry[i];
+ } else {
+ r->idx = -1;
+ r->count = 0;
+ }
+ }
+
+ /* count the successful attempt as well */
+ info->status.rates[ts->ts_final_idx].count++;
+
+ if (unlikely(ts->ts_status)) {
+ sc->stats.ack_fail++;
+ if (ts->ts_status & AR5K_TXERR_FILT) {
+ info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
+ sc->stats.txerr_filt++;
+ }
+ if (ts->ts_status & AR5K_TXERR_XRETRY)
+ sc->stats.txerr_retry++;
+ if (ts->ts_status & AR5K_TXERR_FIFO)
+ sc->stats.txerr_fifo++;
+ } else {
+ info->flags |= IEEE80211_TX_STAT_ACK;
+ info->status.ack_signal = ts->ts_rssi;
+ }
+
+ /*
+ * Remove MAC header padding before giving the frame
+ * back to mac80211.
+ */
+ ath5k_remove_padding(skb);
+
+ if (ts->ts_antenna > 0 && ts->ts_antenna < 5)
+ sc->stats.antenna_tx[ts->ts_antenna]++;
+ else
+ sc->stats.antenna_tx[0]++; /* invalid */
+
+ ieee80211_tx_status(sc->hw, skb);
+}
+
static void
ath5k_tx_processq(struct ath5k_softc *sc, struct ath5k_txq *txq)
{
struct ath5k_buf *bf, *bf0;
struct ath5k_desc *ds;
struct sk_buff *skb;
- struct ieee80211_tx_info *info;
- int i, ret;
+ int 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;
- pci_unmap_single(sc->pdev, bf->skbaddr, skb->len,
- PCI_DMA_TODEVICE);
+ txq->txq_poll_mark = false;
- ieee80211_tx_info_clear_status(info);
- for (i = 0; i < 4; i++) {
- struct ieee80211_tx_rate *r =
- &info->status.rates[i];
+ /* skb might already have been processed last time. */
+ if (bf->skb != NULL) {
+ ds = bf->desc;
- if (ts.ts_rate[i]) {
- r->idx = ath5k_hw_to_driver_rix(sc, ts.ts_rate[i]);
- r->count = ts.ts_retry[i];
- } else {
- r->idx = -1;
- r->count = 0;
+ 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;
}
- }
- /* count the successful attempt as well */
- info->status.rates[ts.ts_final_idx].count++;
+ skb = bf->skb;
+ bf->skb = NULL;
- if (unlikely(ts.ts_status)) {
- sc->stats.ack_fail++;
- if (ts.ts_status & AR5K_TXERR_FILT) {
- info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
- sc->stats.txerr_filt++;
- }
- if (ts.ts_status & AR5K_TXERR_XRETRY)
- sc->stats.txerr_retry++;
- if (ts.ts_status & AR5K_TXERR_FIFO)
- sc->stats.txerr_fifo++;
- } else {
- info->flags |= IEEE80211_TX_STAT_ACK;
- info->status.ack_signal = ts.ts_rssi;
+ dma_unmap_single(sc->dev, bf->skbaddr, skb->len,
+ DMA_TO_DEVICE);
+ ath5k_tx_frame_completed(sc, skb, &ts);
}
/*
- * Remove MAC header padding before giving the frame
- * back to mac80211.
+ * 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.
+ * Always keep the last descriptor to avoid HW races...
*/
- ath5k_remove_padding(skb);
-
- if (ts.ts_antenna > 0 && ts.ts_antenna < 5)
- sc->stats.antenna_tx[ts.ts_antenna]++;
- else
- sc->stats.antenna_tx[0]++; /* invalid */
-
- ieee80211_tx_status(sc->hw, skb);
-
- spin_lock(&sc->txbuflock);
- list_move_tail(&bf->list, &sc->txbuf);
- sc->txbuf_len++;
- spin_unlock(&sc->txbuflock);
+ if (ath5k_hw_get_txdp(sc->ah, txq->qnum) != bf->daddr) {
+ spin_lock(&sc->txbuflock);
+ list_move_tail(&bf->list, &sc->txbuf);
+ sc->txbuf_len++;
+ txq->txq_len--;
+ spin_unlock(&sc->txbuflock);
+ }
}
- if (likely(list_empty(&txq->q)))
- txq->link = NULL;
spin_unlock(&txq->lock);
- if (sc->txbuf_len > ATH_TXBUF / 5)
- ieee80211_wake_queues(sc->hw);
+ if (txq->txq_len < ATH5K_TXQ_LEN_LOW && txq->qnum < 4)
+ ieee80211_wake_queue(sc->hw, txq->qnum);
}
static void
u32 flags;
const int padsize = 0;
- bf->skbaddr = pci_map_single(sc->pdev, skb->data, skb->len,
- PCI_DMA_TODEVICE);
+ bf->skbaddr = dma_map_single(sc->dev, skb->data, skb->len,
+ DMA_TO_DEVICE);
ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, "skb %p [data %p len %u] "
"skbaddr %llx\n", skb, skb->data, skb->len,
(unsigned long long)bf->skbaddr);
- if (pci_dma_mapping_error(sc->pdev, bf->skbaddr)) {
+
+ if (dma_mapping_error(sc->dev, bf->skbaddr)) {
ATH5K_ERR(sc, "beacon DMA mapping failed\n");
return -EIO;
}
* default antenna which is supposed to be an omni.
*
* Note2: On sectored scenarios it's possible to have
- * multiple antennas (1omni -the default- and 14 sectors)
- * so if we choose to actually support this mode we need
- * to allow user to set how many antennas we have and tweak
- * the code below to send beacons on all of them.
+ * multiple antennas (1 omni -- the default -- and 14
+ * sectors), so if we choose to actually support this
+ * mode, we need to allow the user to set how many antennas
+ * we have and tweak the code below to send beacons
+ * on all of them.
*/
if (ah->ah_ant_mode == AR5K_ANTMODE_SECTOR_AP)
antenna = sc->bsent & 4 ? 2 : 1;
- /* 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) */
- ds->ds_data = bf->skbaddr;
- ret = ah->ah_setup_tx_desc(ah, ds, skb->len,
- ieee80211_get_hdrlen_from_skb(skb), padsize,
- AR5K_PKT_TYPE_BEACON, (sc->power_level * 2),
- ieee80211_get_tx_rate(sc->hw, info)->hw_value,
- 1, AR5K_TXKEYIX_INVALID,
- antenna, flags, 0, 0);
- if (ret)
- goto err_unmap;
+ /* 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) */
+ ds->ds_data = bf->skbaddr;
+ ret = ah->ah_setup_tx_desc(ah, ds, skb->len,
+ ieee80211_get_hdrlen_from_skb(skb), padsize,
+ AR5K_PKT_TYPE_BEACON, (sc->power_level * 2),
+ ieee80211_get_tx_rate(sc->hw, info)->hw_value,
+ 1, AR5K_TXKEYIX_INVALID,
+ antenna, flags, 0, 0);
+ if (ret)
+ goto err_unmap;
+
+ return 0;
+err_unmap:
+ dma_unmap_single(sc->dev, bf->skbaddr, skb->len, DMA_TO_DEVICE);
+ return ret;
+}
+
+/*
+ * 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 ath5k_vif *avf = (void *)vif->drv_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, avf->bbuf);
+ avf->bbuf->skb = skb;
+ ret = ath5k_beacon_setup(sc, avf->bbuf);
+ if (ret)
+ avf->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.
+ *
+ * This is called from software irq context (beacontq tasklets)
+ * or user context from ath5k_beacon_config.
+ */
+static void
+ath5k_beacon_send(struct ath5k_softc *sc)
+{
+ struct ath5k_hw *ah = sc->ah;
+ struct ieee80211_vif *vif;
+ struct ath5k_vif *avf;
+ struct ath5k_buf *bf;
+ struct sk_buff *skb;
+
+ ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, "in beacon_send\n");
+
+ /*
+ * Check if the previous beacon has gone out. If
+ * not, don't don't try to post another: skip this
+ * period and wait for the next. Missed beacons
+ * indicate a problem and should not occur. If we
+ * miss too many consecutive beacons reset the device.
+ */
+ if (unlikely(ath5k_hw_num_tx_pending(ah, sc->bhalq) != 0)) {
+ sc->bmisscount++;
+ ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
+ "missed %u consecutive beacons\n", sc->bmisscount);
+ if (sc->bmisscount > 10) { /* NB: 10 is a guess */
+ ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
+ "stuck beacon time (%u missed)\n",
+ sc->bmisscount);
+ ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
+ "stuck beacon, resetting\n");
+ ieee80211_queue_work(sc->hw, &sc->reset_work);
+ }
+ return;
+ }
+ if (unlikely(sc->bmisscount != 0)) {
+ ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
+ "resume beacon xmit after %u misses\n",
+ sc->bmisscount);
+ sc->bmisscount = 0;
+ }
+
+ if ((sc->opmode == NL80211_IFTYPE_AP && sc->num_ap_vifs > 1) ||
+ sc->opmode == NL80211_IFTYPE_MESH_POINT) {
+ u64 tsf = ath5k_hw_get_tsf64(ah);
+ u32 tsftu = TSF_TO_TU(tsf);
+ int slot = ((tsftu % sc->bintval) * ATH_BCBUF) / sc->bintval;
+ vif = sc->bslot[(slot + 1) % ATH_BCBUF];
+ ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
+ "tsf %llx tsftu %x intval %u slot %u vif %p\n",
+ (unsigned long long)tsf, tsftu, sc->bintval, slot, vif);
+ } else /* only one interface */
+ vif = sc->bslot[0];
+
+ if (!vif)
+ return;
+
+ avf = (void *)vif->drv_priv;
+ bf = avf->bbuf;
+ if (unlikely(bf->skb == NULL || sc->opmode == NL80211_IFTYPE_STATION ||
+ sc->opmode == NL80211_IFTYPE_MONITOR)) {
+ ATH5K_WARN(sc, "bf=%p bf_skb=%p\n", bf, bf ? bf->skb : NULL);
+ return;
+ }
+
+ /*
+ * Stop any current dma and put the new frame on the queue.
+ * This should never fail since we check above that no frames
+ * are still pending on the queue.
+ */
+ if (unlikely(ath5k_hw_stop_beacon_queue(ah, sc->bhalq))) {
+ ATH5K_WARN(sc, "beacon queue %u didn't start/stop ?\n", sc->bhalq);
+ /* NB: hw still stops DMA, so proceed */
+ }
+
+ /* refresh the beacon for AP or MESH mode */
+ if (sc->opmode == NL80211_IFTYPE_AP ||
+ sc->opmode == NL80211_IFTYPE_MESH_POINT)
+ ath5k_beacon_update(sc->hw, vif);
+
+ ath5k_hw_set_txdp(ah, sc->bhalq, bf->daddr);
+ ath5k_hw_start_tx_dma(ah, sc->bhalq);
+ ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, "TXDP[%u] = %llx (%p)\n",
+ sc->bhalq, (unsigned long long)bf->daddr, bf->desc);
+
+ skb = ieee80211_get_buffered_bc(sc->hw, vif);
+ while (skb) {
+ ath5k_tx_queue(sc->hw, skb, sc->cabq);
+ skb = ieee80211_get_buffered_bc(sc->hw, vif);
+ }
+
+ sc->bsent++;
+}
+
+/**
+ * ath5k_beacon_update_timers - update beacon timers
+ *
+ * @sc: struct ath5k_softc pointer we are operating on
+ * @bc_tsf: the timestamp of the beacon. 0 to reset the TSF. -1 to perform a
+ * beacon timer update based on the current HW TSF.
+ *
+ * Calculate the next target beacon transmit time (TBTT) based on the timestamp
+ * of a received beacon or the current local hardware TSF and write it to the
+ * beacon timer registers.
+ *
+ * This is called in a variety of situations, e.g. when a beacon is received,
+ * when a TSF update has been detected, but also when an new IBSS is created or
+ * when we otherwise know we have to update the timers, but we keep it in this
+ * function to have it all together in one place.
+ */
+static void
+ath5k_beacon_update_timers(struct ath5k_softc *sc, u64 bc_tsf)
+{
+ struct ath5k_hw *ah = sc->ah;
+ u32 nexttbtt, intval, hw_tu, bc_tu;
+ u64 hw_tsf;
+
+ intval = sc->bintval & AR5K_BEACON_PERIOD;
+ if (sc->opmode == NL80211_IFTYPE_AP && sc->num_ap_vifs > 1) {
+ intval /= ATH_BCBUF; /* staggered multi-bss beacons */
+ if (intval < 15)
+ ATH5K_WARN(sc, "intval %u is too low, min 15\n",
+ intval);
+ }
+ if (WARN_ON(!intval))
+ return;
+
+ /* beacon TSF converted to TU */
+ bc_tu = TSF_TO_TU(bc_tsf);
+
+ /* current TSF converted to TU */
+ hw_tsf = ath5k_hw_get_tsf64(ah);
+ hw_tu = TSF_TO_TU(hw_tsf);
+
+#define FUDGE AR5K_TUNE_SW_BEACON_RESP + 3
+ /* We use FUDGE to make sure the next TBTT is ahead of the current TU.
+ * Since we later substract AR5K_TUNE_SW_BEACON_RESP (10) in the timer
+ * configuration we need to make sure it is bigger than that. */
+
+ if (bc_tsf == -1) {
+ /*
+ * no beacons received, called internally.
+ * just need to refresh timers based on HW TSF.
+ */
+ nexttbtt = roundup(hw_tu + FUDGE, intval);
+ } else if (bc_tsf == 0) {
+ /*
+ * no beacon received, probably called by ath5k_reset_tsf().
+ * reset TSF to start with 0.
+ */
+ nexttbtt = intval;
+ intval |= AR5K_BEACON_RESET_TSF;
+ } else if (bc_tsf > hw_tsf) {
+ /*
+ * beacon received, SW merge happend but HW TSF not yet updated.
+ * not possible to reconfigure timers yet, but next time we
+ * receive a beacon with the same BSSID, the hardware will
+ * automatically update the TSF and then we need to reconfigure
+ * the timers.
+ */
+ ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
+ "need to wait for HW TSF sync\n");
+ return;
+ } else {
+ /*
+ * most important case for beacon synchronization between STA.
+ *
+ * beacon received and HW TSF has been already updated by HW.
+ * update next TBTT based on the TSF of the beacon, but make
+ * sure it is ahead of our local TSF timer.
+ */
+ nexttbtt = bc_tu + roundup(hw_tu + FUDGE - bc_tu, intval);
+ }
+#undef FUDGE
+
+ sc->nexttbtt = nexttbtt;
+
+ intval |= AR5K_BEACON_ENA;
+ ath5k_hw_init_beacon(ah, nexttbtt, intval);
+
+ /*
+ * debugging output last in order to preserve the time critical aspect
+ * of this function
+ */
+ if (bc_tsf == -1)
+ ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
+ "reconfigured timers based on HW TSF\n");
+ else if (bc_tsf == 0)
+ ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
+ "reset HW TSF and timers\n");
+ else
+ ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
+ "updated timers based on beacon TSF\n");
+
+ ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
+ "bc_tsf %llx hw_tsf %llx bc_tu %u hw_tu %u nexttbtt %u\n",
+ (unsigned long long) bc_tsf,
+ (unsigned long long) hw_tsf, bc_tu, hw_tu, nexttbtt);
+ ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, "intval %u %s %s\n",
+ intval & AR5K_BEACON_PERIOD,
+ intval & AR5K_BEACON_ENA ? "AR5K_BEACON_ENA" : "",
+ intval & AR5K_BEACON_RESET_TSF ? "AR5K_BEACON_RESET_TSF" : "");
+}
+
+/**
+ * ath5k_beacon_config - Configure the beacon queues and interrupts
+ *
+ * @sc: struct ath5k_softc pointer we are operating on
+ *
+ * In IBSS mode we use a self-linked tx descriptor if possible. We enable SWBA
+ * interrupts to detect TSF updates only.
+ */
+static void
+ath5k_beacon_config(struct ath5k_softc *sc)
+{
+ struct ath5k_hw *ah = sc->ah;
+ unsigned long flags;
+
+ spin_lock_irqsave(&sc->block, flags);
+ sc->bmisscount = 0;
+ sc->imask &= ~(AR5K_INT_BMISS | AR5K_INT_SWBA);
+
+ if (sc->enable_beacon) {
+ /*
+ * In IBSS mode we use a self-linked tx descriptor and let the
+ * hardware send the beacons automatically. We have to load it
+ * only once here.
+ * We use the SWBA interrupt only to keep track of the beacon
+ * timers in order to detect automatic TSF updates.
+ */
+ ath5k_beaconq_config(sc);
+
+ sc->imask |= AR5K_INT_SWBA;
+
+ if (sc->opmode == NL80211_IFTYPE_ADHOC) {
+ if (ath5k_hw_hasveol(ah))
+ ath5k_beacon_send(sc);
+ } else
+ ath5k_beacon_update_timers(sc, -1);
+ } else {
+ ath5k_hw_stop_beacon_queue(sc->ah, sc->bhalq);
+ }
+
+ ath5k_hw_set_imr(ah, sc->imask);
+ mmiowb();
+ spin_unlock_irqrestore(&sc->block, flags);
+}
+
+static void ath5k_tasklet_beacon(unsigned long data)
+{
+ struct ath5k_softc *sc = (struct ath5k_softc *) data;
+
+ /*
+ * Software beacon alert--time to send a beacon.
+ *
+ * In IBSS mode we use this interrupt just to
+ * keep track of the next TBTT (target beacon
+ * transmission time) in order to detect wether
+ * automatic TSF updates happened.
+ */
+ if (sc->opmode == NL80211_IFTYPE_ADHOC) {
+ /* XXX: only if VEOL suppported */
+ u64 tsf = ath5k_hw_get_tsf64(sc->ah);
+ sc->nexttbtt += sc->bintval;
+ ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
+ "SWBA nexttbtt: %x hw_tu: %x "
+ "TSF: %llx\n",
+ sc->nexttbtt,
+ TSF_TO_TU(tsf),
+ (unsigned long long) tsf);
+ } else {
+ spin_lock(&sc->block);
+ ath5k_beacon_send(sc);
+ spin_unlock(&sc->block);
+ }
+}
+
+
+/********************\
+* Interrupt handling *
+\********************/
+
+static void
+ath5k_intr_calibration_poll(struct ath5k_hw *ah)
+{
+ if (time_is_before_eq_jiffies(ah->ah_cal_next_ani) &&
+ !(ah->ah_cal_mask & AR5K_CALIBRATION_FULL)) {
+ /* run ANI only when full calibration is not active */
+ ah->ah_cal_next_ani = jiffies +
+ msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_ANI);
+ tasklet_schedule(&ah->ah_sc->ani_tasklet);
+
+ } else if (time_is_before_eq_jiffies(ah->ah_cal_next_full)) {
+ ah->ah_cal_next_full = jiffies +
+ msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_FULL);
+ tasklet_schedule(&ah->ah_sc->calib);
+ }
+ /* we could use SWI to generate enough interrupts to meet our
+ * calibration interval requirements, if necessary:
+ * AR5K_REG_ENABLE_BITS(ah, AR5K_CR, AR5K_CR_SWI); */
+}
+
+irqreturn_t
+ath5k_intr(int irq, void *dev_id)
+{
+ struct ath5k_softc *sc = dev_id;
+ struct ath5k_hw *ah = sc->ah;
+ enum ath5k_int status;
+ unsigned int counter = 1000;
+
+ if (unlikely(test_bit(ATH_STAT_INVALID, sc->status) ||
+ ((ath5k_get_bus_type(ah) != ATH_AHB) &&
+ !ath5k_hw_is_intr_pending(ah))))
+ return IRQ_NONE;
+
+ do {
+ ath5k_hw_get_isr(ah, &status); /* NB: clears IRQ too */
+ ATH5K_DBG(sc, ATH5K_DEBUG_INTR, "status 0x%x/0x%x\n",
+ status, sc->imask);
+ if (unlikely(status & AR5K_INT_FATAL)) {
+ /*
+ * Fatal errors are unrecoverable.
+ * Typically these are caused by DMA errors.
+ */
+ ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
+ "fatal int, resetting\n");
+ ieee80211_queue_work(sc->hw, &sc->reset_work);
+ } else if (unlikely(status & AR5K_INT_RXORN)) {
+ /*
+ * Receive buffers are full. Either the bus is busy or
+ * the CPU is not fast enough to process all received
+ * frames.
+ * Older chipsets need a reset to come out of this
+ * condition, but we treat it as RX for newer chips.
+ * We don't know exactly which versions need a reset -
+ * this guess is copied from the HAL.
+ */
+ sc->stats.rxorn_intr++;
+ if (ah->ah_mac_srev < AR5K_SREV_AR5212) {
+ ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
+ "rx overrun, resetting\n");
+ ieee80211_queue_work(sc->hw, &sc->reset_work);
+ }
+ else
+ tasklet_schedule(&sc->rxtq);
+ } else {
+ if (status & AR5K_INT_SWBA) {
+ tasklet_hi_schedule(&sc->beacontq);
+ }
+ if (status & AR5K_INT_RXEOL) {
+ /*
+ * NB: the hardware should re-read the link when
+ * RXE bit is written, but it doesn't work at
+ * least on older hardware revs.
+ */
+ sc->stats.rxeol_intr++;
+ }
+ if (status & AR5K_INT_TXURN) {
+ /* bump tx trigger level */
+ ath5k_hw_update_tx_triglevel(ah, true);
+ }
+ if (status & (AR5K_INT_RXOK | AR5K_INT_RXERR))
+ tasklet_schedule(&sc->rxtq);
+ if (status & (AR5K_INT_TXOK | AR5K_INT_TXDESC
+ | AR5K_INT_TXERR | AR5K_INT_TXEOL))
+ tasklet_schedule(&sc->txtq);
+ if (status & AR5K_INT_BMISS) {
+ /* TODO */
+ }
+ if (status & AR5K_INT_MIB) {
+ sc->stats.mib_intr++;
+ ath5k_hw_update_mib_counters(ah);
+ ath5k_ani_mib_intr(ah);
+ }
+ if (status & AR5K_INT_GPIO)
+ tasklet_schedule(&sc->rf_kill.toggleq);
+
+ }
+
+ if (ath5k_get_bus_type(ah) == ATH_AHB)
+ break;
- return 0;
-err_unmap:
- pci_unmap_single(sc->pdev, bf->skbaddr, skb->len, PCI_DMA_TODEVICE);
- return ret;
+ } while (ath5k_hw_is_intr_pending(ah) && --counter > 0);
+
+ if (unlikely(!counter))
+ ATH5K_WARN(sc, "too many interrupts, giving up for now\n");
+
+ ath5k_intr_calibration_poll(ah);
+
+ return IRQ_HANDLED;
}
/*
- * 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.
- *
- * This is called from software irq context (beacontq tasklets)
- * or user context from ath5k_beacon_config.
+ * Periodically recalibrate the PHY to account
+ * for temperature/environment changes.
*/
static void
-ath5k_beacon_send(struct ath5k_softc *sc)
+ath5k_tasklet_calibrate(unsigned long data)
{
- struct ath5k_buf *bf = sc->bbuf;
+ struct ath5k_softc *sc = (void *)data;
struct ath5k_hw *ah = sc->ah;
- struct sk_buff *skb;
- ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, "in beacon_send\n");
+ /* Only full calibration for now */
+ ah->ah_cal_mask |= AR5K_CALIBRATION_FULL;
- if (unlikely(bf->skb == NULL || sc->opmode == NL80211_IFTYPE_STATION ||
- sc->opmode == NL80211_IFTYPE_MONITOR)) {
- ATH5K_WARN(sc, "bf=%p bf_skb=%p\n", bf, bf ? bf->skb : NULL);
- return;
- }
- /*
- * Check if the previous beacon has gone out. If
- * not don't don't try to post another, skip this
- * period and wait for the next. Missed beacons
- * indicate a problem and should not occur. If we
- * miss too many consecutive beacons reset the device.
- */
- if (unlikely(ath5k_hw_num_tx_pending(ah, sc->bhalq) != 0)) {
- sc->bmisscount++;
- ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
- "missed %u consecutive beacons\n", sc->bmisscount);
- if (sc->bmisscount > 10) { /* NB: 10 is a guess */
- ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
- "stuck beacon time (%u missed)\n",
- sc->bmisscount);
- ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
- "stuck beacon, resetting\n");
- ieee80211_queue_work(sc->hw, &sc->reset_work);
- }
- return;
- }
- if (unlikely(sc->bmisscount != 0)) {
- ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
- "resume beacon xmit after %u misses\n",
- sc->bmisscount);
- sc->bmisscount = 0;
- }
+ ATH5K_DBG(sc, ATH5K_DEBUG_CALIBRATE, "channel %u/%x\n",
+ ieee80211_frequency_to_channel(sc->curchan->center_freq),
+ sc->curchan->hw_value);
- /*
- * Stop any current dma and put the new frame on the queue.
- * This should never fail since we check above that no frames
- * are still pending on the queue.
- */
- if (unlikely(ath5k_hw_stop_tx_dma(ah, sc->bhalq))) {
- ATH5K_WARN(sc, "beacon queue %u didn't start/stop ?\n", sc->bhalq);
- /* NB: hw still stops DMA, so proceed */
+ if (ath5k_hw_gainf_calibrate(ah) == AR5K_RFGAIN_NEED_CHANGE) {
+ /*
+ * Rfgain is out of bounds, reset the chip
+ * to load new gain values.
+ */
+ ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "calibration, resetting\n");
+ ieee80211_queue_work(sc->hw, &sc->reset_work);
}
+ if (ath5k_hw_phy_calibrate(ah, sc->curchan))
+ ATH5K_ERR(sc, "calibration of channel %u failed\n",
+ ieee80211_frequency_to_channel(
+ sc->curchan->center_freq));
- /* refresh the beacon for AP mode */
- if (sc->opmode == NL80211_IFTYPE_AP)
- ath5k_beacon_update(sc->hw, sc->vif);
-
- ath5k_hw_set_txdp(ah, sc->bhalq, bf->daddr);
- ath5k_hw_start_tx_dma(ah, sc->bhalq);
- ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, "TXDP[%u] = %llx (%p)\n",
- sc->bhalq, (unsigned long long)bf->daddr, bf->desc);
-
- skb = ieee80211_get_buffered_bc(sc->hw, sc->vif);
- while (skb) {
- ath5k_tx_queue(sc->hw, skb, sc->cabq);
- skb = ieee80211_get_buffered_bc(sc->hw, sc->vif);
+ /* Noise floor calibration interrupts rx/tx path while I/Q calibration
+ * doesn't.
+ * TODO: We should stop TX here, so that it doesn't interfere.
+ * Note that stopping the queues is not enough to stop TX! */
+ if (time_is_before_eq_jiffies(ah->ah_cal_next_nf)) {
+ ah->ah_cal_next_nf = jiffies +
+ msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_NF);
+ ath5k_hw_update_noise_floor(ah);
}
- sc->bsent++;
+ ah->ah_cal_mask &= ~AR5K_CALIBRATION_FULL;
}
-/**
- * ath5k_beacon_update_timers - update beacon timers
- *
- * @sc: struct ath5k_softc pointer we are operating on
- * @bc_tsf: the timestamp of the beacon. 0 to reset the TSF. -1 to perform a
- * beacon timer update based on the current HW TSF.
- *
- * Calculate the next target beacon transmit time (TBTT) based on the timestamp
- * of a received beacon or the current local hardware TSF and write it to the
- * beacon timer registers.
- *
- * This is called in a variety of situations, e.g. when a beacon is received,
- * when a TSF update has been detected, but also when an new IBSS is created or
- * when we otherwise know we have to update the timers, but we keep it in this
- * function to have it all together in one place.
- */
static void
-ath5k_beacon_update_timers(struct ath5k_softc *sc, u64 bc_tsf)
+ath5k_tasklet_ani(unsigned long data)
{
+ struct ath5k_softc *sc = (void *)data;
struct ath5k_hw *ah = sc->ah;
- u32 nexttbtt, intval, hw_tu, bc_tu;
- u64 hw_tsf;
- intval = sc->bintval & AR5K_BEACON_PERIOD;
- if (WARN_ON(!intval))
- return;
+ ah->ah_cal_mask |= AR5K_CALIBRATION_ANI;
+ ath5k_ani_calibration(ah);
+ ah->ah_cal_mask &= ~AR5K_CALIBRATION_ANI;
+}
- /* beacon TSF converted to TU */
- bc_tu = TSF_TO_TU(bc_tsf);
- /* current TSF converted to TU */
- hw_tsf = ath5k_hw_get_tsf64(ah);
- hw_tu = TSF_TO_TU(hw_tsf);
+static void
+ath5k_tx_complete_poll_work(struct work_struct *work)
+{
+ struct ath5k_softc *sc = container_of(work, struct ath5k_softc,
+ tx_complete_work.work);
+ struct ath5k_txq *txq;
+ int i;
+ bool needreset = false;
+
+ for (i = 0; i < ARRAY_SIZE(sc->txqs); i++) {
+ if (sc->txqs[i].setup) {
+ txq = &sc->txqs[i];
+ spin_lock_bh(&txq->lock);
+ if (txq->txq_len > 1) {
+ if (txq->txq_poll_mark) {
+ ATH5K_DBG(sc, ATH5K_DEBUG_XMIT,
+ "TX queue stuck %d\n",
+ txq->qnum);
+ needreset = true;
+ txq->txq_stuck++;
+ spin_unlock_bh(&txq->lock);
+ break;
+ } else {
+ txq->txq_poll_mark = true;
+ }
+ }
+ spin_unlock_bh(&txq->lock);
+ }
+ }
-#define FUDGE 3
- /* we use FUDGE to make sure the next TBTT is ahead of the current TU */
- if (bc_tsf == -1) {
- /*
- * no beacons received, called internally.
- * just need to refresh timers based on HW TSF.
- */
- nexttbtt = roundup(hw_tu + FUDGE, intval);
- } else if (bc_tsf == 0) {
- /*
- * no beacon received, probably called by ath5k_reset_tsf().
- * reset TSF to start with 0.
- */
- nexttbtt = intval;
- intval |= AR5K_BEACON_RESET_TSF;
- } else if (bc_tsf > hw_tsf) {
- /*
- * beacon received, SW merge happend but HW TSF not yet updated.
- * not possible to reconfigure timers yet, but next time we
- * receive a beacon with the same BSSID, the hardware will
- * automatically update the TSF and then we need to reconfigure
- * the timers.
- */
- ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
- "need to wait for HW TSF sync\n");
- return;
- } else {
- /*
- * most important case for beacon synchronization between STA.
- *
- * beacon received and HW TSF has been already updated by HW.
- * update next TBTT based on the TSF of the beacon, but make
- * sure it is ahead of our local TSF timer.
- */
- nexttbtt = bc_tu + roundup(hw_tu + FUDGE - bc_tu, intval);
+ if (needreset) {
+ ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
+ "TX queues stuck, resetting\n");
+ ath5k_reset(sc, NULL, true);
}
-#undef FUDGE
- sc->nexttbtt = nexttbtt;
+ ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work,
+ msecs_to_jiffies(ATH5K_TX_COMPLETE_POLL_INT));
+}
- intval |= AR5K_BEACON_ENA;
- ath5k_hw_init_beacon(ah, nexttbtt, intval);
+
+/*************************\
+* Initialization routines *
+\*************************/
+
+int
+ath5k_init_softc(struct ath5k_softc *sc, const struct ath_bus_ops *bus_ops)
+{
+ struct ieee80211_hw *hw = sc->hw;
+ struct ath_common *common;
+ int ret;
+ int csz;
+
+ /* Initialize driver private data */
+ SET_IEEE80211_DEV(hw, sc->dev);
+ hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
+ IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
+ IEEE80211_HW_SIGNAL_DBM |
+ IEEE80211_HW_REPORTS_TX_ACK_STATUS;
+
+ 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;
/*
- * debugging output last in order to preserve the time critical aspect
- * of this function
+ * Mark the device as detached to avoid processing
+ * interrupts until setup is complete.
*/
- if (bc_tsf == -1)
- ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
- "reconfigured timers based on HW TSF\n");
- else if (bc_tsf == 0)
- ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
- "reset HW TSF and timers\n");
- else
- ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
- "updated timers based on beacon TSF\n");
+ __set_bit(ATH_STAT_INVALID, sc->status);
- ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
- "bc_tsf %llx hw_tsf %llx bc_tu %u hw_tu %u nexttbtt %u\n",
- (unsigned long long) bc_tsf,
- (unsigned long long) hw_tsf, bc_tu, hw_tu, nexttbtt);
- ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, "intval %u %s %s\n",
- intval & AR5K_BEACON_PERIOD,
- intval & AR5K_BEACON_ENA ? "AR5K_BEACON_ENA" : "",
- intval & AR5K_BEACON_RESET_TSF ? "AR5K_BEACON_RESET_TSF" : "");
-}
+ 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);
+
+
+ /* Setup interrupt handler */
+ ret = request_irq(sc->irq, ath5k_intr, IRQF_SHARED, "ath", sc);
+ if (ret) {
+ ATH5K_ERR(sc, "request_irq failed\n");
+ goto err;
+ }
+
+ /* 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->bus_ops = bus_ops;
+ common->ah = sc->ah;
+ common->hw = hw;
+ common->priv = sc;
+
+ /*
+ * Cache line size is used to size and align various
+ * structures used to communicate with the hardware.
+ */
+ ath5k_read_cachesize(common, &csz);
+ common->cachelsz = csz << 2; /* convert to bytes */
+ spin_lock_init(&common->cc_lock);
-/**
- * ath5k_beacon_config - Configure the beacon queues and interrupts
- *
- * @sc: struct ath5k_softc pointer we are operating on
- *
- * In IBSS mode we use a self-linked tx descriptor if possible. We enable SWBA
- * interrupts to detect TSF updates only.
- */
-static void
-ath5k_beacon_config(struct ath5k_softc *sc)
-{
- struct ath5k_hw *ah = sc->ah;
- unsigned long flags;
+ /* Initialize device */
+ ret = ath5k_hw_init(sc);
+ if (ret)
+ goto err_free_ah;
- spin_lock_irqsave(&sc->block, flags);
- sc->bmisscount = 0;
- sc->imask &= ~(AR5K_INT_BMISS | AR5K_INT_SWBA);
+ /* set up multi-rate retry capabilities */
+ if (sc->ah->ah_version == AR5K_AR5212) {
+ hw->max_rates = 4;
+ hw->max_rate_tries = 11;
+ }
- if (sc->enable_beacon) {
- /*
- * In IBSS mode we use a self-linked tx descriptor and let the
- * hardware send the beacons automatically. We have to load it
- * only once here.
- * We use the SWBA interrupt only to keep track of the beacon
- * timers in order to detect automatic TSF updates.
- */
- ath5k_beaconq_config(sc);
+ hw->vif_data_size = sizeof(struct ath5k_vif);
- sc->imask |= AR5K_INT_SWBA;
+ /* Finish private driver data initialization */
+ ret = ath5k_init(hw);
+ if (ret)
+ goto err_ah;
- if (sc->opmode == NL80211_IFTYPE_ADHOC) {
- if (ath5k_hw_hasveol(ah))
- ath5k_beacon_send(sc);
- } else
- ath5k_beacon_update_timers(sc, -1);
- } else {
- ath5k_hw_stop_tx_dma(sc->ah, sc->bhalq);
+ 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);
+ }
}
- ath5k_hw_set_imr(ah, sc->imask);
- mmiowb();
- spin_unlock_irqrestore(&sc->block, flags);
+ ath5k_debug_init_device(sc);
+
+ /* ready to process interrupts */
+ __clear_bit(ATH_STAT_INVALID, sc->status);
+
+ return 0;
+err_ah:
+ ath5k_hw_deinit(sc->ah);
+err_free_ah:
+ kfree(sc->ah);
+err_irq:
+ free_irq(sc->irq, sc);
+err:
+ return ret;
}
-static void ath5k_tasklet_beacon(unsigned long data)
+static int
+ath5k_stop_locked(struct ath5k_softc *sc)
{
- struct ath5k_softc *sc = (struct ath5k_softc *) data;
+ struct ath5k_hw *ah = sc->ah;
+
+ ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "invalid %u\n",
+ test_bit(ATH_STAT_INVALID, sc->status));
/*
- * Software beacon alert--time to send a beacon.
+ * 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
*
- * In IBSS mode we use this interrupt just to
- * keep track of the next TBTT (target beacon
- * transmission time) in order to detect wether
- * automatic TSF updates happened.
+ * Note that some of this work is not possible if the
+ * hardware is gone (invalid).
*/
- if (sc->opmode == NL80211_IFTYPE_ADHOC) {
- /* XXX: only if VEOL suppported */
- u64 tsf = ath5k_hw_get_tsf64(sc->ah);
- sc->nexttbtt += sc->bintval;
- ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
- "SWBA nexttbtt: %x hw_tu: %x "
- "TSF: %llx\n",
- sc->nexttbtt,
- TSF_TO_TU(tsf),
- (unsigned long long) tsf);
- } else {
- spin_lock(&sc->block);
- ath5k_beacon_send(sc);
- spin_unlock(&sc->block);
- }
-}
+ 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->irq);
+ ath5k_rx_stop(sc);
+ ath5k_hw_dma_stop(ah);
+ ath5k_drain_tx_buffs(sc);
+ ath5k_hw_phy_disable(ah);
+ }
-/********************\
-* Interrupt handling *
-\********************/
+ return 0;
+}
static int
-ath5k_init(struct ath5k_softc *sc)
+ath5k_init_hw(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);
AR5K_INT_RXORN | AR5K_INT_TXDESC | AR5K_INT_TXEOL |
AR5K_INT_FATAL | AR5K_INT_GLOBAL | AR5K_INT_MIB;
- ret = ath5k_reset(sc, NULL);
+ ret = ath5k_reset(sc, NULL, false);
if (ret)
goto done;
* Reset the key cache since some parts do not reset the
* contents on initial power up or resume from suspend.
*/
- for (i = 0; i < AR5K_KEYTABLE_SIZE; i++)
- ath5k_hw_reset_key(ah, i);
+ for (i = 0; i < common->keymax; i++)
+ ath_hw_keyreset(common, (u16) i);
+
+ /* Use higher rates for acks instead of base
+ * rate */
+ ah->ah_ack_bitrate_high = true;
+
+ for (i = 0; i < ARRAY_SIZE(sc->bslot); i++)
+ sc->bslot[i] = NULL;
- 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);
- }
+ ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work,
+ msecs_to_jiffies(ATH5K_TX_COMPLETE_POLL_INT));
- return 0;
+ return ret;
}
static void stop_tasklets(struct ath5k_softc *sc)
* 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)
-{
- if (time_is_before_eq_jiffies(ah->ah_cal_next_ani) &&
- !(ah->ah_cal_mask & AR5K_CALIBRATION_FULL)) {
- /* run ANI only when full calibration is not active */
- ah->ah_cal_next_ani = jiffies +
- msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_ANI);
- tasklet_schedule(&ah->ah_sc->ani_tasklet);
-
- } else if (time_is_before_eq_jiffies(ah->ah_cal_next_full)) {
- ah->ah_cal_next_full = jiffies +
- msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_FULL);
- tasklet_schedule(&ah->ah_sc->calib);
- }
- /* we could use SWI to generate enough interrupts to meet our
- * calibration interval requirements, if necessary:
- * AR5K_REG_ENABLE_BITS(ah, AR5K_CR, AR5K_CR_SWI); */
-}
-
-static irqreturn_t
-ath5k_intr(int irq, void *dev_id)
-{
- struct ath5k_softc *sc = dev_id;
- struct ath5k_hw *ah = sc->ah;
- enum ath5k_int status;
- unsigned int counter = 1000;
+ * (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);
- if (unlikely(test_bit(ATH_STAT_INVALID, sc->status) ||
- !ath5k_hw_is_intr_pending(ah)))
- return IRQ_NONE;
+ ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
+ "putting device to sleep\n");
+ }
- do {
- ath5k_hw_get_isr(ah, &status); /* NB: clears IRQ too */
- ATH5K_DBG(sc, ATH5K_DEBUG_INTR, "status 0x%x/0x%x\n",
- status, sc->imask);
- if (unlikely(status & AR5K_INT_FATAL)) {
- /*
- * Fatal errors are unrecoverable.
- * Typically these are caused by DMA errors.
- */
- ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
- "fatal int, resetting\n");
- ieee80211_queue_work(sc->hw, &sc->reset_work);
- } else if (unlikely(status & AR5K_INT_RXORN)) {
- /*
- * Receive buffers are full. Either the bus is busy or
- * the CPU is not fast enough to process all received
- * frames.
- * Older chipsets need a reset to come out of this
- * condition, but we treat it as RX for newer chips.
- * We don't know exactly which versions need a reset -
- * this guess is copied from the HAL.
- */
- sc->stats.rxorn_intr++;
- if (ah->ah_mac_srev < AR5K_SREV_AR5212) {
- ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
- "rx overrun, resetting\n");
- ieee80211_queue_work(sc->hw, &sc->reset_work);
- }
- else
- tasklet_schedule(&sc->rxtq);
- } else {
- if (status & AR5K_INT_SWBA) {
- tasklet_hi_schedule(&sc->beacontq);
- }
- if (status & AR5K_INT_RXEOL) {
- /*
- * NB: the hardware should re-read the link when
- * RXE bit is written, but it doesn't work at
- * least on older hardware revs.
- */
- sc->stats.rxeol_intr++;
- }
- if (status & AR5K_INT_TXURN) {
- /* bump tx trigger level */
- ath5k_hw_update_tx_triglevel(ah, true);
- }
- if (status & (AR5K_INT_RXOK | AR5K_INT_RXERR))
- tasklet_schedule(&sc->rxtq);
- if (status & (AR5K_INT_TXOK | AR5K_INT_TXDESC
- | AR5K_INT_TXERR | AR5K_INT_TXEOL))
- tasklet_schedule(&sc->txtq);
- if (status & AR5K_INT_BMISS) {
- /* TODO */
- }
- if (status & AR5K_INT_MIB) {
- sc->stats.mib_intr++;
- ath5k_hw_update_mib_counters(ah);
- ath5k_ani_mib_intr(ah);
- }
- if (status & AR5K_INT_GPIO)
- tasklet_schedule(&sc->rf_kill.toggleq);
+ mmiowb();
+ mutex_unlock(&sc->lock);
- }
- } while (ath5k_hw_is_intr_pending(ah) && --counter > 0);
+ stop_tasklets(sc);
- if (unlikely(!counter))
- ATH5K_WARN(sc, "too many interrupts, giving up for now\n");
+ cancel_delayed_work_sync(&sc->tx_complete_work);
- ath5k_intr_calibration_poll(ah);
+ ath5k_rfkill_hw_stop(sc->ah);
- return IRQ_HANDLED;
+ return ret;
}
/*
- * Periodically recalibrate the PHY to account
- * for temperature/environment changes.
+ * Reset the hardware. If chan is not NULL, then also pause rx/tx
+ * and change to the given channel.
+ *
+ * This should be called with sc->lock.
*/
-static void
-ath5k_tasklet_calibrate(unsigned long data)
+static int
+ath5k_reset(struct ath5k_softc *sc, struct ieee80211_channel *chan,
+ bool skip_pcu)
{
- struct ath5k_softc *sc = (void *)data;
struct ath5k_hw *ah = sc->ah;
+ int ret, ani_mode;
- /* Only full calibration for now */
- ah->ah_cal_mask |= AR5K_CALIBRATION_FULL;
+ ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "resetting\n");
- ATH5K_DBG(sc, ATH5K_DEBUG_CALIBRATE, "channel %u/%x\n",
- ieee80211_frequency_to_channel(sc->curchan->center_freq),
- sc->curchan->hw_value);
+ ath5k_hw_set_imr(ah, 0);
+ synchronize_irq(sc->irq);
+ stop_tasklets(sc);
- if (ath5k_hw_gainf_calibrate(ah) == AR5K_RFGAIN_NEED_CHANGE) {
- /*
- * Rfgain is out of bounds, reset the chip
- * to load new gain values.
- */
- ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "calibration, resetting\n");
- ieee80211_queue_work(sc->hw, &sc->reset_work);
+ /* Save ani mode and disable ANI durring
+ * reset. If we don't we might get false
+ * PHY error interrupts. */
+ ani_mode = ah->ah_sc->ani_state.ani_mode;
+ ath5k_ani_init(ah, ATH5K_ANI_MODE_OFF);
+
+ /* We are going to empty hw queues
+ * so we should also free any remaining
+ * tx buffers */
+ ath5k_drain_tx_buffs(sc);
+ if (chan) {
+ sc->curchan = chan;
+ sc->curband = &sc->sbands[chan->band];
+ }
+ ret = ath5k_hw_reset(ah, sc->opmode, sc->curchan, chan != NULL,
+ skip_pcu);
+ if (ret) {
+ ATH5K_ERR(sc, "can't reset hardware (%d)\n", ret);
+ goto err;
}
- if (ath5k_hw_phy_calibrate(ah, sc->curchan))
- ATH5K_ERR(sc, "calibration of channel %u failed\n",
- ieee80211_frequency_to_channel(
- sc->curchan->center_freq));
- /* Noise floor calibration interrupts rx/tx path while I/Q calibration
- * doesn't. We stop the queues so that calibration doesn't interfere
- * with TX and don't run it as often */
- if (time_is_before_eq_jiffies(ah->ah_cal_next_nf)) {
- ah->ah_cal_next_nf = jiffies +
- msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_NF);
- ieee80211_stop_queues(sc->hw);
- ath5k_hw_update_noise_floor(ah);
- ieee80211_wake_queues(sc->hw);
+ ret = ath5k_rx_start(sc);
+ if (ret) {
+ ATH5K_ERR(sc, "can't start recv logic\n");
+ goto err;
}
- ah->ah_cal_mask &= ~AR5K_CALIBRATION_FULL;
-}
+ ath5k_ani_init(ah, ani_mode);
+ ah->ah_cal_next_full = jiffies;
+ ah->ah_cal_next_ani = jiffies;
+ ah->ah_cal_next_nf = jiffies;
+ ewma_init(&ah->ah_beacon_rssi_avg, 1024, 8);
-static void
-ath5k_tasklet_ani(unsigned long data)
-{
- struct ath5k_softc *sc = (void *)data;
- struct ath5k_hw *ah = sc->ah;
+ /*
+ * Change channels and update the h/w rate map if we're switching;
+ * e.g. 11a to 11b/g.
+ *
+ * We may be doing a reset in response to an ioctl that changes the
+ * channel so update any state that might change as a result.
+ *
+ * XXX needed?
+ */
+/* ath5k_chan_change(sc, c); */
- ah->ah_cal_mask |= AR5K_CALIBRATION_ANI;
- ath5k_ani_calibration(ah);
- ah->ah_cal_mask &= ~AR5K_CALIBRATION_ANI;
-}
+ ath5k_beacon_config(sc);
+ /* intrs are enabled by ath5k_beacon_config */
+ ieee80211_wake_queues(sc->hw);
-/********************\
-* Mac80211 functions *
-\********************/
+ return 0;
+err:
+ return ret;
+}
-static int
-ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
+static void ath5k_reset_work(struct work_struct *work)
{
- struct ath5k_softc *sc = hw->priv;
+ struct ath5k_softc *sc = container_of(work, struct ath5k_softc,
+ reset_work);
- return ath5k_tx_queue(hw, skb, sc->txq);
+ mutex_lock(&sc->lock);
+ ath5k_reset(sc, NULL, true);
+ mutex_unlock(&sc->lock);
}
-static int ath5k_tx_queue(struct ieee80211_hw *hw, struct sk_buff *skb,
- struct ath5k_txq *txq)
+static int
+ath5k_init(struct ieee80211_hw *hw)
{
+
struct ath5k_softc *sc = hw->priv;
- struct ath5k_buf *bf;
- unsigned long flags;
- int padsize;
+ struct ath5k_hw *ah = sc->ah;
+ struct ath_regulatory *regulatory = ath5k_hw_regulatory(ah);
+ struct ath5k_txq *txq;
+ u8 mac[ETH_ALEN] = {};
+ int ret;
- ath5k_debug_dump_skb(sc, skb, "TX ", 1);
- if (sc->opmode == NL80211_IFTYPE_MONITOR)
- ATH5K_DBG(sc, ATH5K_DEBUG_XMIT, "tx in monitor (scan?)\n");
+ /*
+ * 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 (ret < 0)
+ goto err;
+ if (ret > 0)
+ __set_bit(ATH_STAT_MRRETRY, sc->status);
/*
- * the hardware expects the header padded to 4 byte boundaries
- * if this is not the case we add the padding after the header
+ * 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.
*/
- padsize = ath5k_add_padding(skb);
- if (padsize < 0) {
- ATH5K_ERR(sc, "tx hdrlen not %%4: not enough"
- " headroom to pad");
- goto drop_packet;
+ ret = ath5k_setup_bands(hw);
+ if (ret) {
+ ATH5K_ERR(sc, "can't get channels\n");
+ goto err;
}
- 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);
+ /* 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);
- bf->skb = skb;
+ /*
+ * Allocate tx+rx descriptors and populate the lists.
+ */
+ ret = ath5k_desc_alloc(sc);
+ if (ret) {
+ ATH5K_ERR(sc, "can't allocate descriptors\n");
+ goto err;
+ }
- 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;
+ /*
+ * 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;
}
- return NETDEV_TX_OK;
-drop_packet:
- dev_kfree_skb_any(skb);
- return NETDEV_TX_OK;
-}
+ /* 5211 and 5212 usually support 10 queues but we better rely on the
+ * capability information */
+ if (ah->ah_capabilities.cap_queues.q_tx_num >= 6) {
+ /* This order matches mac80211's queue priority, so we can
+ * directly use the mac80211 queue number without any mapping */
+ txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_VO);
+ if (IS_ERR(txq)) {
+ ATH5K_ERR(sc, "can't setup xmit queue\n");
+ ret = PTR_ERR(txq);
+ goto err_queues;
+ }
+ txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_VI);
+ if (IS_ERR(txq)) {
+ ATH5K_ERR(sc, "can't setup xmit queue\n");
+ ret = PTR_ERR(txq);
+ goto err_queues;
+ }
+ txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BE);
+ if (IS_ERR(txq)) {
+ ATH5K_ERR(sc, "can't setup xmit queue\n");
+ ret = PTR_ERR(txq);
+ goto err_queues;
+ }
+ txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BK);
+ if (IS_ERR(txq)) {
+ ATH5K_ERR(sc, "can't setup xmit queue\n");
+ ret = PTR_ERR(txq);
+ goto err_queues;
+ }
+ hw->queues = 4;
+ } else {
+ /* older hardware (5210) can only support one data queue */
+ txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BE);
+ if (IS_ERR(txq)) {
+ ATH5K_ERR(sc, "can't setup xmit queue\n");
+ ret = PTR_ERR(txq);
+ goto err_queues;
+ }
+ hw->queues = 1;
+ }
-/*
- * Reset the hardware. If chan is not NULL, then also pause rx/tx
- * and change to the given channel.
- *
- * This should be called with sc->lock.
- */
-static int
-ath5k_reset(struct ath5k_softc *sc, struct ieee80211_channel *chan)
-{
- struct ath5k_hw *ah = sc->ah;
- int ret;
+ 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);
- ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "resetting\n");
+ INIT_WORK(&sc->reset_work, ath5k_reset_work);
+ INIT_DELAYED_WORK(&sc->tx_complete_work, ath5k_tx_complete_poll_work);
- ath5k_hw_set_imr(ah, 0);
- synchronize_irq(sc->pdev->irq);
- stop_tasklets(sc);
+ ret = ath5k_eeprom_read_mac(ah, mac);
+ if (ret) {
+ ATH5K_ERR(sc, "unable to read address from EEPROM\n");
+ goto err_queues;
+ }
- if (chan) {
- ath5k_txq_cleanup(sc);
- ath5k_rx_stop(sc);
+ SET_IEEE80211_PERM_ADDR(hw, mac);
+ memcpy(&sc->lladdr, mac, ETH_ALEN);
+ /* All MAC address bits matter for ACKs */
+ ath5k_update_bssid_mask_and_opmode(sc, NULL);
- sc->curchan = chan;
- sc->curband = &sc->sbands[chan->band];
- }
- ret = ath5k_hw_reset(ah, sc->opmode, sc->curchan, chan != NULL);
+ 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 reset hardware (%d)\n", ret);
- goto err;
+ ATH5K_ERR(sc, "can't initialize regulatory system\n");
+ goto err_queues;
}
- ret = ath5k_rx_start(sc);
+ ret = ieee80211_register_hw(hw);
if (ret) {
- ATH5K_ERR(sc, "can't start recv logic\n");
- goto err;
+ ATH5K_ERR(sc, "can't register ieee80211 hw\n");
+ goto err_queues;
}
- ath5k_ani_init(ah, ah->ah_sc->ani_state.ani_mode);
-
- ah->ah_cal_next_full = jiffies;
- ah->ah_cal_next_ani = jiffies;
- ah->ah_cal_next_nf = jiffies;
-
- /*
- * Change channels and update the h/w rate map if we're switching;
- * e.g. 11a to 11b/g.
- *
- * We may be doing a reset in response to an ioctl that changes the
- * channel so update any state that might change as a result.
- *
- * XXX needed?
- */
-/* ath5k_chan_change(sc, c); */
+ if (!ath_is_world_regd(regulatory))
+ regulatory_hint(hw->wiphy, regulatory->alpha2);
- ath5k_beacon_config(sc);
- /* intrs are enabled by ath5k_beacon_config */
+ ath5k_init_leds(sc);
- ieee80211_wake_queues(sc->hw);
+ 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);
err:
return ret;
}
-static void ath5k_reset_work(struct work_struct *work)
+void
+ath5k_deinit_softc(struct ath5k_softc *sc)
{
- struct ath5k_softc *sc = container_of(work, struct ath5k_softc,
- reset_work);
+ struct ieee80211_hw *hw = sc->hw;
- mutex_lock(&sc->lock);
- ath5k_reset(sc, sc->curchan);
- mutex_unlock(&sc->lock);
+ /*
+ * 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...
+ */
+ ath5k_debug_finish_device(sc);
+ ieee80211_unregister_hw(hw);
+ ath5k_desc_free(sc);
+ 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.
+ */
+ ath5k_hw_deinit(sc->ah);
+ free_irq(sc->irq, sc);
+}
+
+/********************\
+* Mac80211 functions *
+\********************/
+
+static int
+ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
+{
+ struct ath5k_softc *sc = hw->priv;
+ u16 qnum = skb_get_queue_mapping(skb);
+
+ if (WARN_ON(qnum >= sc->ah->ah_capabilities.cap_queues.q_tx_num)) {
+ dev_kfree_skb_any(skb);
+ return 0;
+ }
+
+ return ath5k_tx_queue(hw, skb, &sc->txqs[qnum]);
}
static int ath5k_start(struct ieee80211_hw *hw)
{
- return ath5k_init(hw->priv);
+ return ath5k_init_hw(hw->priv);
}
static void ath5k_stop(struct ieee80211_hw *hw)
{
struct ath5k_softc *sc = hw->priv;
int ret;
+ struct ath5k_vif *avf = (void *)vif->drv_priv;
mutex_lock(&sc->lock);
- if (sc->vif) {
- ret = 0;
+
+ if ((vif->type == NL80211_IFTYPE_AP ||
+ vif->type == NL80211_IFTYPE_ADHOC)
+ && (sc->num_ap_vifs + sc->num_adhoc_vifs) >= ATH_BCBUF) {
+ ret = -ELNRNG;
goto end;
}
- sc->vif = vif;
+ /* Don't allow other interfaces if one ad-hoc is configured.
+ * TODO: Fix the problems with ad-hoc and multiple other interfaces.
+ * We would need to operate the HW in ad-hoc mode to allow TSF updates
+ * for the IBSS, but this breaks with additional AP or STA interfaces
+ * at the moment. */
+ if (sc->num_adhoc_vifs ||
+ (sc->nvifs && vif->type == NL80211_IFTYPE_ADHOC)) {
+ ATH5K_ERR(sc, "Only one single ad-hoc interface is allowed.\n");
+ ret = -ELNRNG;
+ goto end;
+ }
switch (vif->type) {
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_STATION:
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_MESH_POINT:
- case NL80211_IFTYPE_MONITOR:
- sc->opmode = vif->type;
+ avf->opmode = vif->type;
break;
default:
ret = -EOPNOTSUPP;
goto end;
}
- ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "add interface mode %d\n", sc->opmode);
+ sc->nvifs++;
+ ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "add interface mode %d\n", avf->opmode);
+
+ /* Assign the vap/adhoc to a beacon xmit slot. */
+ if ((avf->opmode == NL80211_IFTYPE_AP) ||
+ (avf->opmode == NL80211_IFTYPE_ADHOC) ||
+ (avf->opmode == NL80211_IFTYPE_MESH_POINT)) {
+ int slot;
+ WARN_ON(list_empty(&sc->bcbuf));
+ avf->bbuf = list_first_entry(&sc->bcbuf, struct ath5k_buf,
+ list);
+ list_del(&avf->bbuf->list);
+
+ avf->bslot = 0;
+ for (slot = 0; slot < ATH_BCBUF; slot++) {
+ if (!sc->bslot[slot]) {
+ avf->bslot = slot;
+ break;
+ }
+ }
+ BUG_ON(sc->bslot[avf->bslot] != NULL);
+ sc->bslot[avf->bslot] = vif;
+ if (avf->opmode == NL80211_IFTYPE_AP)
+ sc->num_ap_vifs++;
+ else if (avf->opmode == NL80211_IFTYPE_ADHOC)
+ sc->num_adhoc_vifs++;
+ }
+
+ /* Any MAC address is fine, all others are included through the
+ * filter.
+ */
+ memcpy(&sc->lladdr, vif->addr, ETH_ALEN);
ath5k_hw_set_lladdr(sc->ah, vif->addr);
- ath5k_mode_setup(sc);
+
+ memcpy(&avf->lladdr, vif->addr, ETH_ALEN);
+
+ ath5k_mode_setup(sc, vif);
ret = 0;
end:
struct ieee80211_vif *vif)
{
struct ath5k_softc *sc = hw->priv;
- u8 mac[ETH_ALEN] = {};
+ struct ath5k_vif *avf = (void *)vif->drv_priv;
+ unsigned int i;
mutex_lock(&sc->lock);
- if (sc->vif != vif)
- goto end;
+ sc->nvifs--;
+
+ if (avf->bbuf) {
+ ath5k_txbuf_free_skb(sc, avf->bbuf);
+ list_add_tail(&avf->bbuf->list, &sc->bcbuf);
+ for (i = 0; i < ATH_BCBUF; i++) {
+ if (sc->bslot[i] == vif) {
+ sc->bslot[i] = NULL;
+ break;
+ }
+ }
+ avf->bbuf = NULL;
+ }
+ if (avf->opmode == NL80211_IFTYPE_AP)
+ sc->num_ap_vifs--;
+ else if (avf->opmode == NL80211_IFTYPE_ADHOC)
+ sc->num_adhoc_vifs--;
- ath5k_hw_set_lladdr(sc->ah, mac);
- sc->vif = NULL;
-end:
+ ath5k_update_bssid_mask_and_opmode(sc, NULL);
mutex_unlock(&sc->lock);
}
return ((u64)(mfilt[1]) << 32) | mfilt[0];
}
+static bool ath_any_vif_assoc(struct ath5k_softc *sc)
+{
+ struct ath_vif_iter_data iter_data;
+ iter_data.hw_macaddr = NULL;
+ iter_data.any_assoc = false;
+ iter_data.need_set_hw_addr = false;
+ iter_data.found_active = true;
+
+ ieee80211_iterate_active_interfaces_atomic(sc->hw, ath_vif_iter,
+ &iter_data);
+ return iter_data.any_assoc;
+}
+
#define SUPPORTED_FIF_FLAGS \
FIF_PROMISC_IN_BSS | FIF_ALLMULTI | FIF_FCSFAIL | \
FIF_PLCPFAIL | FIF_CONTROL | FIF_OTHER_BSS | \
rfilt |= AR5K_RX_FILTER_PHYERR;
/* FIF_BCN_PRBRESP_PROMISC really means to enable beacons
- * and probes for any BSSID, this needs testing */
- if (*new_flags & FIF_BCN_PRBRESP_PROMISC)
- rfilt |= AR5K_RX_FILTER_BEACON | AR5K_RX_FILTER_PROBEREQ;
+ * and probes for any BSSID */
+ if ((*new_flags & FIF_BCN_PRBRESP_PROMISC) || (sc->nvifs > 1))
+ rfilt |= AR5K_RX_FILTER_BEACON;
/* FIF_CONTROL doc says that if FIF_PROMISC_IN_BSS is not
* set we should only pass on control frames for this
switch (sc->opmode) {
case NL80211_IFTYPE_MESH_POINT:
- case NL80211_IFTYPE_MONITOR:
rfilt |= AR5K_RX_FILTER_CONTROL |
AR5K_RX_FILTER_BEACON |
AR5K_RX_FILTER_PROBEREQ |
/* Set multicast bits */
ath5k_hw_set_mcast_filter(ah, mfilt[0], mfilt[1]);
- /* Set the cached hw filter flags, this will alter actually
+ /* Set the cached hw filter flags, this will later actually
* be set in HW */
sc->filter_flags = rfilt;
if (modparam_nohwcrypt)
return -EOPNOTSUPP;
- if (sc->opmode == NL80211_IFTYPE_AP)
- return -EOPNOTSUPP;
-
- switch (key->alg) {
- case ALG_WEP:
- case ALG_TKIP:
+ switch (key->cipher) {
+ case WLAN_CIPHER_SUITE_WEP40:
+ case WLAN_CIPHER_SUITE_WEP104:
+ case WLAN_CIPHER_SUITE_TKIP:
break;
- case ALG_CCMP:
- if (sc->ah->ah_aes_support)
+ case WLAN_CIPHER_SUITE_CCMP:
+ if (common->crypt_caps & ATH_CRYPT_CAP_CIPHER_AESCCM)
break;
-
return -EOPNOTSUPP;
default:
WARN_ON(1);
switch (cmd) {
case SET_KEY:
- ret = ath5k_hw_set_key(sc->ah, key->keyidx, key,
- sta ? sta->addr : NULL);
- if (ret) {
- ATH5K_ERR(sc, "can't set the key\n");
- goto unlock;
+ ret = ath_key_config(common, vif, sta, key);
+ if (ret >= 0) {
+ key->hw_key_idx = ret;
+ /* push IV and Michael MIC generation to stack */
+ key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
+ if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
+ key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
+ if (key->cipher == WLAN_CIPHER_SUITE_CCMP)
+ key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
+ ret = 0;
}
- __set_bit(key->keyidx, common->keymap);
- key->hw_key_idx = key->keyidx;
- key->flags |= (IEEE80211_KEY_FLAG_GENERATE_IV |
- IEEE80211_KEY_FLAG_GENERATE_MMIC);
break;
case DISABLE_KEY:
- ath5k_hw_reset_key(sc->ah, key->keyidx);
- __clear_bit(key->keyidx, common->keymap);
+ ath_key_delete(common, key);
break;
default:
ret = -EINVAL;
- goto unlock;
}
-unlock:
mmiowb();
mutex_unlock(&sc->lock);
return ret;
{
struct ath5k_softc *sc = hw->priv;
struct ieee80211_conf *conf = &hw->conf;
+ struct ath_common *common = ath5k_hw_common(sc->ah);
+ struct ath_cycle_counters *cc = &common->cc_survey;
+ unsigned int div = common->clockrate * 1000;
- if (idx != 0)
+ if (idx != 0)
return -ENOENT;
survey->channel = conf->channel;
survey->filled = SURVEY_INFO_NOISE_DBM;
survey->noise = sc->ah->ah_noise_floor;
+ spin_lock_bh(&common->cc_lock);
+ ath_hw_cycle_counters_update(common);
+ if (cc->cycles > 0) {
+ survey->filled |= SURVEY_INFO_CHANNEL_TIME |
+ SURVEY_INFO_CHANNEL_TIME_BUSY |
+ SURVEY_INFO_CHANNEL_TIME_RX |
+ SURVEY_INFO_CHANNEL_TIME_TX;
+ survey->channel_time += cc->cycles / div;
+ survey->channel_time_busy += cc->rx_busy / div;
+ survey->channel_time_rx += cc->rx_frame / div;
+ survey->channel_time_tx += cc->tx_frame / div;
+ }
+ memset(cc, 0, sizeof(*cc));
+ spin_unlock_bh(&common->cc_lock);
+
return 0;
}
ath5k_hw_reset_tsf(sc->ah);
}
-/*
- * 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;
-}
-
static void
set_beacon_filter(struct ieee80211_hw *hw, bool enable)
{
struct ieee80211_bss_conf *bss_conf,
u32 changes)
{
+ struct ath5k_vif *avf = (void *)vif->drv_priv;
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_associd(ah);
+ ath5k_hw_set_bssid(ah);
mmiowb();
}
sc->bintval = bss_conf->beacon_int;
if (changes & BSS_CHANGED_ASSOC) {
- sc->assoc = bss_conf->assoc;
+ avf->assoc = bss_conf->assoc;
+ if (bss_conf->assoc)
+ sc->assoc = bss_conf->assoc;
+ else
+ sc->assoc = ath_any_vif_assoc(sc);
+
if (sc->opmode == NL80211_IFTYPE_STATION)
set_beacon_filter(hw, sc->assoc);
ath5k_hw_set_ledstate(sc->ah, sc->assoc ?
"Bss Info ASSOC %d, bssid: %pM\n",
bss_conf->aid, common->curbssid);
common->curaid = bss_conf->aid;
- ath5k_hw_set_associd(ah);
+ ath5k_hw_set_bssid(ah);
/* Once ANI is available you would start it here */
}
}
BSS_CHANGED_BEACON_INT))
ath5k_beacon_config(sc);
- unlock:
mutex_unlock(&sc->lock);
}
ath5k_hw_set_coverage_class(sc->ah, coverage_class);
mutex_unlock(&sc->lock);
}
+
+static int ath5k_conf_tx(struct ieee80211_hw *hw, u16 queue,
+ const struct ieee80211_tx_queue_params *params)
+{
+ struct ath5k_softc *sc = hw->priv;
+ struct ath5k_hw *ah = sc->ah;
+ struct ath5k_txq_info qi;
+ int ret = 0;
+
+ if (queue >= ah->ah_capabilities.cap_queues.q_tx_num)
+ return 0;
+
+ mutex_lock(&sc->lock);
+
+ ath5k_hw_get_tx_queueprops(ah, queue, &qi);
+
+ qi.tqi_aifs = params->aifs;
+ qi.tqi_cw_min = params->cw_min;
+ qi.tqi_cw_max = params->cw_max;
+ qi.tqi_burst_time = params->txop;
+
+ ATH5K_DBG(sc, ATH5K_DEBUG_ANY,
+ "Configure tx [queue %d], "
+ "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
+ queue, params->aifs, params->cw_min,
+ params->cw_max, params->txop);
+
+ if (ath5k_hw_set_tx_queueprops(ah, queue, &qi)) {
+ ATH5K_ERR(sc,
+ "Unable to update hardware queue %u!\n", queue);
+ ret = -EIO;
+ } else
+ ath5k_hw_reset_tx_queue(ah, queue);
+
+ mutex_unlock(&sc->lock);
+
+ return ret;
+}
+
+static int ath5k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
+{
+ struct ath5k_softc *sc = hw->priv;
+
+ if (tx_ant == 1 && rx_ant == 1)
+ ath5k_hw_set_antenna_mode(sc->ah, AR5K_ANTMODE_FIXED_A);
+ else if (tx_ant == 2 && rx_ant == 2)
+ ath5k_hw_set_antenna_mode(sc->ah, AR5K_ANTMODE_FIXED_B);
+ else if ((tx_ant & 3) == 3 && (rx_ant & 3) == 3)
+ ath5k_hw_set_antenna_mode(sc->ah, AR5K_ANTMODE_DEFAULT);
+ else
+ return -EINVAL;
+ return 0;
+}
+
+static int ath5k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
+{
+ struct ath5k_softc *sc = hw->priv;
+
+ switch (sc->ah->ah_ant_mode) {
+ case AR5K_ANTMODE_FIXED_A:
+ *tx_ant = 1; *rx_ant = 1; break;
+ case AR5K_ANTMODE_FIXED_B:
+ *tx_ant = 2; *rx_ant = 2; break;
+ case AR5K_ANTMODE_DEFAULT:
+ *tx_ant = 3; *rx_ant = 3; break;
+ }
+ return 0;
+}
+
+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 = ath5k_conf_tx,
+ .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,
+ .set_antenna = ath5k_set_antenna,
+ .get_antenna = ath5k_get_antenna,
+};