diff options
Diffstat (limited to 'drivers/net/wireless/ath5k/base.c')
| -rw-r--r-- | drivers/net/wireless/ath5k/base.c | 2974 |
1 files changed, 2974 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath5k/base.c b/drivers/net/wireless/ath5k/base.c new file mode 100644 index 00000000000..72bcf321d1c --- /dev/null +++ b/drivers/net/wireless/ath5k/base.c @@ -0,0 +1,2974 @@ +/*- + * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting + * Copyright (c) 2004-2005 Atheros Communications, Inc. + * Copyright (c) 2006 Devicescape Software, Inc. + * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com> + * Copyright (c) 2007 Luis R. Rodriguez <mcgrof@winlab.rutgers.edu> + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any + * redistribution must be conditioned upon including a substantially + * similar Disclaimer requirement for further binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY + * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, + * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER + * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF + * THE POSSIBILITY OF SUCH DAMAGES. + * + */ + +#include <linux/version.h> +#include <linux/module.h> +#include <linux/delay.h> +#include <linux/if.h> +#include <linux/netdevice.h> +#include <linux/cache.h> +#include <linux/pci.h> +#include <linux/ethtool.h> +#include <linux/uaccess.h> + +#include <net/ieee80211_radiotap.h> + +#include <asm/unaligned.h> + +#include "base.h" +#include "reg.h" +#include "debug.h" + +/* unaligned little endian access */ +#define LE_READ_2(_p) (le16_to_cpu(get_unaligned((__le16 *)(_p)))) +#define LE_READ_4(_p) (le32_to_cpu(get_unaligned((__le32 *)(_p)))) + +enum { + ATH_LED_TX, + ATH_LED_RX, +}; + +static int ath5k_calinterval = 10; /* Calibrate PHY every 10 secs (TODO: Fixme) */ + + +/******************\ +* 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("0.1.1 (EXPERIMENTAL)"); + + +/* Known PCI ids */ +static struct pci_device_id ath5k_pci_id_table[] __devinitdata = { + { PCI_VDEVICE(ATHEROS, 0x0207), .driver_data = AR5K_AR5210 }, /* 5210 early */ + { PCI_VDEVICE(ATHEROS, 0x0007), .driver_data = AR5K_AR5210 }, /* 5210 */ + { PCI_VDEVICE(ATHEROS, 0x0011), .driver_data = AR5K_AR5211 }, /* 5311 - this is on AHB bus !*/ + { PCI_VDEVICE(ATHEROS, 0x0012), .driver_data = AR5K_AR5211 }, /* 5211 */ + { PCI_VDEVICE(ATHEROS, 0x0013), .driver_data = AR5K_AR5212 }, /* 5212 */ + { PCI_VDEVICE(3COM_2, 0x0013), .driver_data = AR5K_AR5212 }, /* 3com 5212 */ + { PCI_VDEVICE(3COM, 0x0013), .driver_data = AR5K_AR5212 }, /* 3com 3CRDAG675 5212 */ + { PCI_VDEVICE(ATHEROS, 0x1014), .driver_data = AR5K_AR5212 }, /* IBM minipci 5212 */ + { PCI_VDEVICE(ATHEROS, 0x0014), .driver_data = AR5K_AR5212 }, /* 5212 combatible */ + { PCI_VDEVICE(ATHEROS, 0x0015), .driver_data = AR5K_AR5212 }, /* 5212 combatible */ + { PCI_VDEVICE(ATHEROS, 0x0016), .driver_data = AR5K_AR5212 }, /* 5212 combatible */ + { PCI_VDEVICE(ATHEROS, 0x0017), .driver_data = AR5K_AR5212 }, /* 5212 combatible */ + { PCI_VDEVICE(ATHEROS, 0x0018), .driver_data = AR5K_AR5212 }, /* 5212 combatible */ + { PCI_VDEVICE(ATHEROS, 0x0019), .driver_data = AR5K_AR5212 }, /* 5212 combatible */ + { PCI_VDEVICE(ATHEROS, 0x001a), .driver_data = AR5K_AR5212 }, /* 2413 Griffin-lite */ + { PCI_VDEVICE(ATHEROS, 0x001b), .driver_data = AR5K_AR5212 }, /* 5413 Eagle */ + { PCI_VDEVICE(ATHEROS, 0x001c), .driver_data = AR5K_AR5212 }, /* 5424 Condor (PCI-E)*/ + { PCI_VDEVICE(ATHEROS, 0x0023), .driver_data = AR5K_AR5212 }, /* 5416 */ + { PCI_VDEVICE(ATHEROS, 0x0024), .driver_data = AR5K_AR5212 }, /* 5418 */ + { 0 } +}; +MODULE_DEVICE_TABLE(pci, ath5k_pci_id_table); + +/* Known SREVs */ +static struct ath5k_srev_name srev_names[] = { + { "5210", AR5K_VERSION_VER, AR5K_SREV_VER_AR5210 }, + { "5311", AR5K_VERSION_VER, AR5K_SREV_VER_AR5311 }, + { "5311A", AR5K_VERSION_VER, AR5K_SREV_VER_AR5311A }, + { "5311B", AR5K_VERSION_VER, AR5K_SREV_VER_AR5311B }, + { "5211", AR5K_VERSION_VER, AR5K_SREV_VER_AR5211 }, + { "5212", AR5K_VERSION_VER, AR5K_SREV_VER_AR5212 }, + { "5213", AR5K_VERSION_VER, AR5K_SREV_VER_AR5213 }, + { "5213A", AR5K_VERSION_VER, AR5K_SREV_VER_AR5213A }, + { "2424", AR5K_VERSION_VER, AR5K_SREV_VER_AR2424 }, + { "5424", AR5K_VERSION_VER, AR5K_SREV_VER_AR5424 }, + { "5413", AR5K_VERSION_VER, AR5K_SREV_VER_AR5413 }, + { "5414", AR5K_VERSION_VER, AR5K_SREV_VER_AR5414 }, + { "5416", AR5K_VERSION_VER, AR5K_SREV_VER_AR5416 }, + { "5418", AR5K_VERSION_VER, AR5K_SREV_VER_AR5418 }, + { "xxxxx", AR5K_VERSION_VER, AR5K_SREV_UNKNOWN }, + { "5110", AR5K_VERSION_RAD, AR5K_SREV_RAD_5110 }, + { "5111", AR5K_VERSION_RAD, AR5K_SREV_RAD_5111 }, + { "2111", AR5K_VERSION_RAD, AR5K_SREV_RAD_2111 }, + { "5112", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112 }, + { "5112A", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112A }, + { "2112", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112 }, + { "2112A", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112A }, + { "SChip", AR5K_VERSION_RAD, AR5K_SREV_RAD_SC1 }, + { "SChip", AR5K_VERSION_RAD, AR5K_SREV_RAD_SC2 }, + { "5133", AR5K_VERSION_RAD, AR5K_SREV_RAD_5133 }, + { "xxxxx", AR5K_VERSION_RAD, AR5K_SREV_UNKNOWN }, +}; + +/* + * 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 +static int ath5k_pci_suspend(struct pci_dev *pdev, + pm_message_t state); +static int ath5k_pci_resume(struct pci_dev *pdev); +#else +#define ath5k_pci_suspend NULL +#define ath5k_pci_resume NULL +#endif /* CONFIG_PM */ + +static struct pci_driver ath5k_pci_drv_id = { + .name = "ath5k_pci", + .id_table = ath5k_pci_id_table, + .probe = ath5k_pci_probe, + .remove = __devexit_p(ath5k_pci_remove), + .suspend = ath5k_pci_suspend, + .resume = ath5k_pci_resume, +}; + + + +/* + * Prototypes - MAC 802.11 stack related functions + */ +static int ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb, + struct ieee80211_tx_control *ctl); +static int ath5k_reset(struct ieee80211_hw *hw); +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_if_init_conf *conf); +static void ath5k_remove_interface(struct ieee80211_hw *hw, + struct ieee80211_if_init_conf *conf); +static int ath5k_config(struct ieee80211_hw *hw, + struct ieee80211_conf *conf); +static int ath5k_config_interface(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_if_conf *conf); +static void ath5k_configure_filter(struct ieee80211_hw *hw, + unsigned int changed_flags, + unsigned int *new_flags, + int mc_count, struct dev_mc_list *mclist); +static int ath5k_set_key(struct ieee80211_hw *hw, + enum set_key_cmd cmd, + const u8 *local_addr, const u8 *addr, + struct ieee80211_key_conf *key); +static int ath5k_get_stats(struct ieee80211_hw *hw, + struct ieee80211_low_level_stats *stats); +static int ath5k_get_tx_stats(struct ieee80211_hw *hw, + struct ieee80211_tx_queue_stats *stats); +static u64 ath5k_get_tsf(struct ieee80211_hw *hw); +static void ath5k_reset_tsf(struct ieee80211_hw *hw); +static int ath5k_beacon_update(struct ieee80211_hw *hw, + struct sk_buff *skb, + struct ieee80211_tx_control *ctl); + +static 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, + .config_interface = ath5k_config_interface, + .configure_filter = ath5k_configure_filter, + .set_key = ath5k_set_key, + .get_stats = ath5k_get_stats, + .conf_tx = NULL, + .get_tx_stats = ath5k_get_tx_stats, + .get_tsf = ath5k_get_tsf, + .reset_tsf = ath5k_reset_tsf, + .beacon_update = ath5k_beacon_update, +}; + +/* + * 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_rates(struct ieee80211_rate *rates, + const struct ath5k_rate_table *rt, + unsigned int max); +static unsigned int ath5k_copy_channels(struct ath5k_hw *ah, + struct ieee80211_channel *channels, + unsigned int mode, + unsigned int max); +static int ath5k_getchannels(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 ieee80211_tx_control *ctl); + +static inline void ath5k_txbuf_free(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); + dev_kfree_skb(bf->skb); + bf->skb = NULL; +} + +/* 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 ath5k_desc *ds, + struct sk_buff *skb); +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, + struct ieee80211_tx_control *ctl); +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 inline u64 ath5k_extend_tsf(struct ath5k_hw *ah, u32 rstamp) +{ + u64 tsf = ath5k_hw_get_tsf64(ah); + + if ((tsf & 0x7fff) < rstamp) + tsf -= 0x8000; + + 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_tasklet_reset(unsigned long data); + +static void ath5k_calibrate(unsigned long data); +/* LED functions */ +static void ath5k_led_off(unsigned long data); +static void ath5k_led_blink(struct ath5k_softc *sc, + unsigned int on, + unsigned int off); +static void ath5k_led_event(struct ath5k_softc *sc, + int event); + + +/* + * Module init/exit functions + */ +static int __init +init_ath5k_pci(void) +{ + int ret; + + ath5k_debug_init(); + + ret = pci_register_driver(&ath5k_pci_drv_id); + 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_drv_id); + + ath5k_debug_finish(); +} + +module_init(init_ath5k_pci); +module_exit(exit_ath5k_pci); + + +/********************\ +* PCI Initialization * +\********************/ + +static const char * +ath5k_chip_name(enum ath5k_srev_type type, u_int16_t val) +{ + const char *name = "xxxxx"; + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(srev_names); i++) { + if (srev_names[i].sr_type != type) + continue; + if ((val & 0xff) < srev_names[i + 1].sr_val) { + name = srev_names[i].sr_name; + break; + } + } + + return name; +} + +static int __devinit +ath5k_pci_probe(struct pci_dev *pdev, + const struct pci_device_id *id) +{ + void __iomem *mem; + struct ath5k_softc *sc; + struct ieee80211_hw *hw; + int ret; + u8 csz; + + ret = pci_enable_device(pdev); + if (ret) { + dev_err(&pdev->dev, "can't enable device\n"); + goto err; + } + + /* XXX 32-bit addressing only */ + ret = pci_set_dma_mask(pdev, DMA_32BIT_MASK); + if (ret) { + dev_err(&pdev->dev, "32-bit DMA not available\n"); + goto err_dis; + } + + /* + * Cache line size is used to size and align various + * structures used to communicate with the hardware. + */ + pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz); + if (csz == 0) { + /* + * Linux 2.4.18 (at least) writes the cache line size + * register as a 16-bit wide register which is wrong. + * We must have this setup properly for rx buffer + * DMA to work so force a reasonable value here if it + * comes up zero. + */ + csz = L1_CACHE_BYTES / sizeof(u32); + pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz); + } + /* + * The default setting of latency timer yields poor results, + * set it to the value used by other systems. It may be worth + * tweaking this setting more. + */ + pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8); + + /* Enable bus mastering */ + pci_set_master(pdev); + + /* + * Disable the RETRY_TIMEOUT register (0x41) to keep + * PCI Tx retries from interfering with C3 CPU state. + */ + pci_write_config_byte(pdev, 0x41, 0); + + ret = pci_request_region(pdev, 0, "ath5k"); + if (ret) { + dev_err(&pdev->dev, "cannot reserve PCI memory region\n"); + goto err_dis; + } + + mem = pci_iomap(pdev, 0, 0); + if (!mem) { + dev_err(&pdev->dev, "cannot remap PCI memory region\n") ; + ret = -EIO; + goto err_reg; + } + + /* + * Allocate hw (mac80211 main struct) + * and hw->priv (driver private data) + */ + hw = ieee80211_alloc_hw(sizeof(*sc), &ath5k_hw_ops); + if (hw == NULL) { + dev_err(&pdev->dev, "cannot allocate ieee80211_hw\n"); + ret = -ENOMEM; + goto err_map; + } + + dev_info(&pdev->dev, "registered as '%s'\n", wiphy_name(hw->wiphy)); + + /* Initialize driver private data */ + SET_IEEE80211_DEV(hw, &pdev->dev); + hw->flags = IEEE80211_HW_RX_INCLUDES_FCS; + hw->extra_tx_headroom = 2; + hw->channel_change_time = 5000; + /* these names are misleading */ + hw->max_rssi = -110; /* signal in dBm */ + hw->max_noise = -110; /* noise in dBm */ + hw->max_signal = 100; /* we will provide a percentage based on rssi */ + sc = hw->priv; + sc->hw = hw; + sc->pdev = pdev; + + ath5k_debug_init_device(sc); + + /* + * Mark the device as detached to avoid processing + * interrupts until setup is complete. + */ + __set_bit(ATH_STAT_INVALID, sc->status); + + sc->iobase = mem; /* So we can unmap it on detach */ + sc->cachelsz = csz * sizeof(u32); /* convert to bytes */ + sc->opmode = IEEE80211_IF_TYPE_STA; + mutex_init(&sc->lock); + spin_lock_init(&sc->rxbuflock); + spin_lock_init(&sc->txbuflock); + + /* Set private data */ + pci_set_drvdata(pdev, hw); + + /* Enable msi for devices that support it */ + pci_enable_msi(pdev); + + /* 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; + } + + /* Initialize device */ + sc->ah = ath5k_hw_attach(sc, id->driver_data); + if (IS_ERR(sc->ah)) { + ret = PTR_ERR(sc->ah); + goto err_irq; + } + + /* Finish private driver data initialization */ + ret = ath5k_attach(pdev, hw); + if (ret) + goto err_ah; + + ATH5K_INFO(sc, "Atheros AR%s chip found (MAC: 0x%x, PHY: 0x%x)\n", + ath5k_chip_name(AR5K_VERSION_VER,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(MODE_IEEE80211A, 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(MODE_IEEE80211B, 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); + } + } + + + /* ready to process interrupts */ + __clear_bit(ATH_STAT_INVALID, sc->status); + + return 0; +err_ah: + ath5k_hw_detach(sc->ah); +err_irq: + free_irq(pdev->irq, sc); +err_free: + pci_disable_msi(pdev); + ieee80211_free_hw(hw); +err_map: + pci_iounmap(pdev, mem); +err_reg: + pci_release_region(pdev, 0); +err_dis: + pci_disable_device(pdev); +err: + return ret; +} + +static void __devexit +ath5k_pci_remove(struct pci_dev *pdev) +{ + struct ieee80211_hw *hw = pci_get_drvdata(pdev); + struct ath5k_softc *sc = hw->priv; + + ath5k_debug_finish_device(sc); + ath5k_detach(pdev, hw); + ath5k_hw_detach(sc->ah); + free_irq(pdev->irq, sc); + pci_disable_msi(pdev); + pci_iounmap(pdev, sc->iobase); + pci_release_region(pdev, 0); + pci_disable_device(pdev); + ieee80211_free_hw(hw); +} + +#ifdef CONFIG_PM +static int +ath5k_pci_suspend(struct pci_dev *pdev, pm_message_t state) +{ + struct ieee80211_hw *hw = pci_get_drvdata(pdev); + struct ath5k_softc *sc = hw->priv; + + if (test_bit(ATH_STAT_LEDSOFT, sc->status)) + ath5k_hw_set_gpio(sc->ah, sc->led_pin, 1); + + ath5k_stop_hw(sc); + pci_save_state(pdev); + pci_disable_device(pdev); + pci_set_power_state(pdev, PCI_D3hot); + + return 0; +} + +static int +ath5k_pci_resume(struct pci_dev *pdev) +{ + struct ieee80211_hw *hw = pci_get_drvdata(pdev); + struct ath5k_softc *sc = hw->priv; + struct ath5k_hw *ah = sc->ah; + int i, err; + + err = pci_set_power_state(pdev, PCI_D0); + if (err) + return err; + + err = pci_enable_device(pdev); + if (err) + return err; + + pci_restore_state(pdev); + /* + * 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 + */ + pci_write_config_byte(pdev, 0x41, 0); + + ath5k_init(sc); + if (test_bit(ATH_STAT_LEDSOFT, sc->status)) { + ath5k_hw_set_gpio_output(ah, sc->led_pin); + ath5k_hw_set_gpio(ah, sc->led_pin, 0); + } + + /* + * Reset the key cache since some parts do not + * reset the contents on initial power up or resume. + * + * FIXME: This may need to be revisited when mac80211 becomes + * aware of suspend/resume. + */ + for (i = 0; i < AR5K_KEYTABLE_SIZE; i++) + ath5k_hw_reset_key(ah, i); + + return 0; +} +#endif /* CONFIG_PM */ + + + +/***********************\ +* Driver Initialization * +\***********************/ + +static int +ath5k_attach(struct pci_dev *pdev, struct ieee80211_hw *hw) +{ + struct ath5k_softc *sc = hw->priv; + struct ath5k_hw *ah = sc->ah; + u8 mac[ETH_ALEN]; + unsigned int i; + int ret; + + ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "devid 0x%x\n", pdev->device); + + /* + * 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. + */ + if (ah->ah_setup_xtx_desc(ah, NULL, 0, 0, 0, 0, 0, 0)) + __set_bit(ATH_STAT_MRRETRY, sc->status); + + /* + * Reset the key cache since some parts do not + * reset the contents on initial power up. + */ + for (i = 0; i < AR5K_KEYTABLE_SIZE; i++) + ath5k_hw_reset_key(ah, i); + + /* + * 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_getchannels(hw); + if (ret) { + ATH5K_ERR(sc, "can't get channels\n"); + goto err; + } + + /* NB: setup here so ath5k_rate_update is happy */ + if (test_bit(MODE_IEEE80211A, ah->ah_modes)) + ath5k_setcurmode(sc, MODE_IEEE80211A); + else + ath5k_setcurmode(sc, MODE_IEEE80211B); + + /* + * 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; + } + + /* + * 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. + */ + 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->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_bhal; + } + + tasklet_init(&sc->rxtq, ath5k_tasklet_rx, (unsigned long)sc); + tasklet_init(&sc->txtq, ath5k_tasklet_tx, (unsigned long)sc); + tasklet_init(&sc->restq, ath5k_tasklet_reset, (unsigned long)sc); + setup_timer(&sc->calib_tim, ath5k_calibrate, (unsigned long)sc); + setup_timer(&sc->led_tim, ath5k_led_off, (unsigned long)sc); + + sc->led_on = 0; /* low true */ + /* + * Auto-enable soft led processing for IBM cards and for + * 5211 minipci cards. + */ + if (pdev->device == PCI_DEVICE_ID_ATHEROS_AR5212_IBM || + pdev->device == PCI_DEVICE_ID_ATHEROS_AR5211) { + __set_bit(ATH_STAT_LEDSOFT, sc->status); + sc->led_pin = 0; + } + /* Enable softled on PIN1 on HP Compaq nc6xx, nc4000 & nx5000 laptops */ + if (pdev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ) { + __set_bit(ATH_STAT_LEDSOFT, sc->status); + sc->led_pin = 0; + } + if (test_bit(ATH_STAT_LEDSOFT, sc->status)) { + ath5k_hw_set_gpio_output(ah, sc->led_pin); + ath5k_hw_set_gpio(ah, sc->led_pin, !sc->led_on); + } + + ath5k_hw_get_lladdr(ah, mac); + SET_IEEE80211_PERM_ADDR(hw, mac); + /* All MAC address bits matter for ACKs */ + memset(sc->bssidmask, 0xff, ETH_ALEN); + 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; + } + + return 0; +err_queues: + ath5k_txq_release(sc); +err_bhal: + ath5k_hw_release_tx_queue(ah, sc->bhalq); +err_desc: + ath5k_desc_free(sc, pdev); +err: + return ret; +} + +static void +ath5k_detach(struct pci_dev *pdev, struct ieee80211_hw *hw) +{ + struct ath5k_softc *sc = hw->priv; + + /* + * NB: the order of these is important: + * o call the 802.11 layer before detaching ath5k_hw to + * 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); + + /* + * NB: can't reclaim these until after ieee80211_ifdetach + * returns because we'll get called back to reclaim node + * state and potentially want to use them. + */ +} + + + + +/********************\ +* Channel/mode setup * +\********************/ + +/* + * 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; +} + +static unsigned int +ath5k_copy_rates(struct ieee80211_rate *rates, + const struct ath5k_rate_table *rt, + unsigned int max) +{ + unsigned int i, count; + + if (rt == NULL) + return 0; + + for (i = 0, count = 0; i < rt->rate_count && max > 0; i++) { + if (!rt->rates[i].valid) + continue; + rates->rate = rt->rates[i].rate_kbps / 100; + rates->val = rt->rates[i].rate_code; + rates->flags = rt->rates[i].modulation; + rates++; + count++; + max--; + } + + return count; +} + +static unsigned int +ath5k_copy_channels(struct ath5k_hw *ah, + struct ieee80211_channel *channels, + unsigned int mode, + unsigned int max) +{ + static const struct { unsigned int mode, mask, chan; } map[] = { + [MODE_IEEE80211A] = { CHANNEL_OFDM, CHANNEL_OFDM | CHANNEL_TURBO, CHANNEL_A }, + [MODE_ATHEROS_TURBO] = { CHANNEL_OFDM|CHANNEL_TURBO, CHANNEL_OFDM | CHANNEL_TURBO, CHANNEL_T }, + [MODE_IEEE80211B] = { CHANNEL_CCK, CHANNEL_CCK, CHANNEL_B }, + [MODE_IEEE80211G] = { CHANNEL_OFDM, CHANNEL_OFDM, CHANNEL_G }, + [MODE_ATHEROS_TURBOG] = { CHANNEL_OFDM | CHANNEL_TURBO, CHANNEL_OFDM | CHANNEL_TURBO, CHANNEL_TG }, + }; + static const struct ath5k_regchannel chans_2ghz[] = + IEEE80211_CHANNELS_2GHZ; + static const struct ath5k_regchannel chans_5ghz[] = + IEEE80211_CHANNELS_5GHZ; + const struct ath5k_regchannel *chans; + enum ath5k_regdom dmn; + unsigned int i, count, size, chfreq, all, f, ch; + + if (!test_bit(mode, ah->ah_modes)) + return 0; + + all = ah->ah_regdomain == DMN_DEFAULT || CHAN_DEBUG == 1; + + switch (mode) { + case MODE_IEEE80211A: + case MODE_ATHEROS_TURBO: + /* 1..220, but 2GHz frequencies are filtered by check_channel */ + size = all ? 220 : ARRAY_SIZE(chans_5ghz); + chans = chans_5ghz; + dmn = ath5k_regdom2flag(ah->ah_regdomain, + IEEE80211_CHANNELS_5GHZ_MIN); + chfreq = CHANNEL_5GHZ; + break; + case MODE_IEEE80211B: + case MODE_IEEE80211G: + case MODE_ATHEROS_TURBOG: + size = all ? 26 : ARRAY_SIZE(chans_2ghz); + chans = chans_2ghz; + dmn = ath5k_regdom2flag(ah->ah_regdomain, + IEEE80211_CHANNELS_2GHZ_MIN); + chfreq = CHANNEL_2GHZ; + break; + default: + ATH5K_WARN(ah->ah_sc, "bad mode, not copying channels\n"); + return 0; + } + + for (i = 0, count = 0; i < size && max > 0; i++) { + ch = all ? i + 1 : chans[i].chan; + f = ath5k_ieee2mhz(ch); + /* Check if channel is supported by the chipset */ + if (!ath5k_channel_ok(ah, f, chfreq)) + continue; + + /* Match regulation domain */ + if (!all && !(IEEE80211_DMN(chans[i].domain) & + IEEE80211_DMN(dmn))) + continue; + + if (!all && (chans[i].mode & map[mode].mask) != map[mode].mode) + continue; + + /* Write channel and increment counter */ + channels->chan = ch; + channels->freq = f; + channels->val = map[mode].chan; + channels++; + count++; + max--; + } + + return count; +} + +/* Only tries to register modes our EEPROM says it can support */ +#define REGISTER_MODE(m) do { \ + ret = ath5k_register_mode(hw, m); \ + if (ret) \ + return ret; \ +} while (0) \ + +static inline int +ath5k_register_mode(struct ieee80211_hw *hw, u8 m) +{ + struct ath5k_softc *sc = hw->priv; + struct ieee80211_hw_mode *modes = sc->modes; + unsigned int i; + int ret; + + if (!test_bit(m, sc->ah->ah_capabilities.cap_mode)) + return 0; + + for (i = 0; i < NUM_DRIVER_MODES; i++) { + if (modes[i].mode != m || !modes[i].num_channels) + continue; + ret = ieee80211_register_hwmode(hw, &modes[i]); + if (ret) { + ATH5K_ERR(sc, "can't register hwmode %u\n", m); + return ret; + } + return 0; + } + BUG(); +} + +static int +ath5k_getchannels(struct ieee80211_hw *hw) +{ + struct ath5k_softc *sc = hw->priv; + struct ath5k_hw *ah = sc->ah; + struct ieee80211_hw_mode *modes = sc->modes; + unsigned int i, max_r, max_c; + int ret; + + BUILD_BUG_ON(ARRAY_SIZE(sc->modes) < 3); + + /* The order here does not matter */ + modes[0].mode = MODE_IEEE80211G; + modes[1].mode = MODE_IEEE80211B; + modes[2].mode = MODE_IEEE80211A; + + max_r = ARRAY_SIZE(sc->rates); + max_c = ARRAY_SIZE(sc->channels); + + for (i = 0; i < NUM_DRIVER_MODES; i++) { + struct ieee80211_hw_mode *mode = &modes[i]; + const struct ath5k_rate_table *hw_rates; + + if (i == 0) { + modes[0].rates = sc->rates; + modes->channels = sc->channels; + } else { + struct ieee80211_hw_mode *prev_mode = &modes[i-1]; + int prev_num_r = prev_mode->num_rates; + int prev_num_c = prev_mode->num_channels; + mode->rates = &prev_mode->rates[prev_num_r]; + mode->channels = &prev_mode->channels[prev_num_c]; + } + + hw_rates = ath5k_hw_get_rate_table(ah, mode->mode); + mode->num_rates = ath5k_copy_rates(mode->rates, hw_rates, + max_r); + mode->num_channels = ath5k_copy_channels(ah, mode->channels, + mode->mode, max_c); + max_r -= mode->num_rates; + max_c -= mode->num_channels; + } + + /* We try to register all modes this driver supports. We don't bother + * with MODE_IEEE80211B for AR5212 as MODE_IEEE80211G already accounts + * for that as per mac80211. Then, REGISTER_MODE() will will actually + * check the eeprom reading for more reliable capability information. + * Order matters here as per mac80211's latest preference. This will + * all hopefullly soon go away. */ + + REGISTER_MODE(MODE_IEEE80211G); + if (ah->ah_version != AR5K_AR5212) + REGISTER_MODE(MODE_IEEE80211B); + REGISTER_MODE(MODE_IEEE80211A); + + ath5k_debug_dump_modes(sc, modes); + + return ret; +} + +/* + * Set/change channels. If the channel is really being changed, + * it's done by reseting the chip. To accomplish this we must + * first cleanup any pending DMA, then restart stuff after a la + * ath5k_init. + */ +static int +ath5k_chan_set(struct ath5k_softc *sc, struct ieee80211_channel *chan) +{ + struct ath5k_hw *ah = sc->ah; + int ret; + + ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "%u (%u MHz) -> %u (%u MHz)\n", + sc->curchan->chan, sc->curchan->freq, + chan->chan, chan->freq); + + if (chan->freq != sc->curchan->freq || chan->val != sc->curchan->val) { + /* + * 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. + */ + ath5k_hw_set_intr(ah, 0); /* disable interrupts */ + ath5k_txq_cleanup(sc); /* clear pending tx frames */ + ath5k_rx_stop(sc); /* turn off frame recv */ + ret = ath5k_hw_reset(ah, sc->opmode, chan, true); + if (ret) { + ATH5K_ERR(sc, "%s: unable to reset channel %u " + "(%u Mhz)\n", __func__, chan->chan, chan->freq); + return ret; + } + sc->curchan = chan; + ath5k_hw_set_txpower_limit(sc->ah, 0); + + /* + * Re-enable rx framework. + */ + ret = ath5k_rx_start(sc); + if (ret) { + ATH5K_ERR(sc, "%s: unable to restart recv logic\n", + __func__); + return ret; + } + + /* + * Change channels and update the h/w rate map + * if we're switching; e.g. 11a to 11b/g. + * + * XXX needed? + */ +/* ath5k_chan_change(sc, chan); */ + + ath5k_beacon_config(sc); + /* + * Re-enable interrupts. + */ + ath5k_hw_set_intr(ah, sc->imask); + } + + return 0; +} + +static void +ath5k_setcurmode(struct ath5k_softc *sc, unsigned int mode) +{ + if (unlikely(test_bit(ATH_STAT_LEDSOFT, sc->status))) { + /* from Atheros NDIS driver, w/ permission */ + static const struct { + u16 rate; /* tx/rx 802.11 rate */ + u16 timeOn; /* LED on time (ms) */ + u16 timeOff; /* LED off time (ms) */ + } blinkrates[] = { + { 108, 40, 10 }, + { 96, 44, 11 }, + { 72, 50, 13 }, + { 48, 57, 14 }, + { 36, 67, 16 }, + { 24, 80, 20 }, + { 22, 100, 25 }, + { 18, 133, 34 }, + { 12, 160, 40 }, + { 10, 200, 50 }, + { 6, 240, 58 }, + { 4, 267, 66 }, + { 2, 400, 100 }, + { 0, 500, 130 } + }; + const struct ath5k_rate_table *rt = + ath5k_hw_get_rate_table(sc->ah, mode); + unsigned int i, j; + + BUG_ON(rt == NULL); + + memset(sc->hwmap, 0, sizeof(sc->hwmap)); + for (i = 0; i < 32; i++) { + u8 ix = rt->rate_code_to_index[i]; + if (ix == 0xff) { + sc->hwmap[i].ledon = msecs_to_jiffies(500); + sc->hwmap[i].ledoff = msecs_to_jiffies(130); + continue; + } + sc->hwmap[i].txflags = IEEE80211_RADIOTAP_F_DATAPAD; + if (SHPREAMBLE_FLAG(ix) || rt->rates[ix].modulation == + IEEE80211_RATE_OFDM) + sc->hwmap[i].txflags |= + IEEE80211_RADIOTAP_F_SHORTPRE; + /* receive frames include FCS */ + sc->hwmap[i].rxflags = sc->hwmap[i].txflags | + IEEE80211_RADIOTAP_F_FCS; + /* setup blink rate table to avoid per-packet lookup */ + for (j = 0; j < ARRAY_SIZE(blinkrates) - 1; j++) + if (blinkrates[j].rate == /* XXX why 7f? */ + (rt->rates[ix].dot11_rate&0x7f)) + break; + + sc->hwmap[i].ledon = msecs_to_jiffies(blinkrates[j]. + timeOn); + sc->hwmap[i].ledoff = msecs_to_jiffies(blinkrates[j]. + timeOff); + } + } + + sc->curmode = mode; +} + +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); + + ath5k_hw_set_mcast_filter(ah, 0, 0); + ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "RX filter 0x%x\n", rfilt); +} + + + + +/***************\ +* Buffers setup * +\***************/ + +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; + + if (likely(skb == NULL)) { + unsigned int off; + + /* + * Allocate buffer with headroom_needed space for the + * fake physical layer header at the start. + */ + skb = dev_alloc_skb(sc->rxbufsize + sc->cachelsz - 1); + if (unlikely(skb == NULL)) { + ATH5K_ERR(sc, "can't alloc skbuff of size %u\n", + sc->rxbufsize + sc->cachelsz - 1); + return -ENOMEM; + } + /* + * Cache-line-align. This is important (for the + * 5210 at least) as not doing so causes bogus data + * in rx'd frames. + */ + off = ((unsigned long)skb->data) % sc->cachelsz; + if (off != 0) + skb_reserve(skb, sc->cachelsz - off); + + bf->skb = skb; + bf->skbaddr = pci_map_single(sc->pdev, + skb->data, sc->rxbufsize, PCI_DMA_FROMDEVICE); + if (unlikely(pci_dma_mapping_error(bf->skbaddr))) { + ATH5K_ERR(sc, "%s: DMA mapping failed\n", __func__); + dev_kfree_skb(skb); + bf->skb = NULL; + return -ENOMEM; + } + } + + /* + * 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 insure 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 insures 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; + ath5k_hw_setup_rx_desc(ah, ds, + skb_tailroom(skb), /* buffer size */ + 0); + + if (sc->rxlink != NULL) + *sc->rxlink = bf->daddr; + sc->rxlink = &ds->ds_link; + return 0; +} + +static int +ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf, + struct ieee80211_tx_control *ctl) +{ + struct ath5k_hw *ah = sc->ah; + struct ath5k_txq *txq = sc->txq; + struct ath5k_desc *ds = bf->desc; + struct sk_buff *skb = bf->skb; + unsigned int pktlen, flags, keyidx = AR5K_TXKEYIX_INVALID; + int ret; + + flags = AR5K_TXDESC_INTREQ | AR5K_TXDESC_CLRDMASK; + bf->ctl = *ctl; + /* XXX endianness */ + bf->skbaddr = pci_map_single(sc->pdev, skb->data, skb->len, + PCI_DMA_TODEVICE); + + if (ctl->flags & IEEE80211_TXCTL_NO_ACK) + flags |= AR5K_TXDESC_NOACK; + + pktlen = skb->len + FCS_LEN; + + if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)) { + keyidx = ctl->key_idx; + pktlen += ctl->icv_len; + } + + ret = ah->ah_setup_tx_desc(ah, ds, pktlen, + ieee80211_get_hdrlen_from_skb(skb), AR5K_PKT_TYPE_NORMAL, + (ctl->power_level * 2), ctl->tx_rate, ctl->retry_limit, keyidx, 0, flags, 0, 0); + if (ret) + goto err_unmap; + + ds->ds_link = 0; + ds->ds_data = bf->skbaddr; + + spin_lock_bh(&txq->lock); + list_add_tail(&bf->list, &txq->q); + sc->tx_stats.data[txq->qnum].len++; + if (txq->link == NULL) /* is this first packet? */ + ath5k_hw_put_tx_buf(ah, txq->qnum, bf->daddr); + else /* no, so only link it */ + *txq->link = bf->daddr; + + txq->link = &ds->ds_link; + ath5k_hw_tx_start(ah, txq->qnum); + spin_unlock_bh(&txq->lock); + + return 0; +err_unmap: + pci_unmap_single(sc->pdev, bf->skbaddr, skb->len, PCI_DMA_TODEVICE); + return ret; +} + +/*******************\ +* Descriptors setup * +\*******************/ + +static int +ath5k_desc_alloc(struct ath5k_softc *sc, struct pci_dev *pdev) +{ + struct ath5k_desc *ds; + struct ath5k_buf *bf; + dma_addr_t da; + unsigned int i; + int ret; + + /* allocate descriptors */ + sc->desc_len = sizeof(struct ath5k_desc) * + (ATH_TXBUF + ATH_RXBUF + ATH_BCBUF + 1); + sc->desc = pci_alloc_consistent(pdev, sc->desc_len, &sc->desc_daddr); + if (sc->desc == NULL) { + ATH5K_ERR(sc, "can't allocate descriptors\n"); + ret = -ENOMEM; + goto err; + } + ds = sc->desc; + da = sc->desc_daddr; + ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "DMA map: %p (%zu) -> %llx\n", + ds, sc->desc_len, (unsigned long long)sc->desc_daddr); + + bf = kcalloc(1 + ATH_TXBUF + ATH_RXBUF + ATH_BCBUF, + sizeof(struct ath5k_buf), GFP_KERNEL); + if (bf == NULL) { + ATH5K_ERR(sc, "can't allocate bufptr\n"); + ret = -ENOMEM; + goto err_free; + } + sc->bufptr = bf; + + INIT_LIST_HEAD(&sc->rxbuf); + for (i = 0; i < ATH_RXBUF; i++, bf++, ds++, da += sizeof(*ds)) { + bf->desc = ds; + bf->daddr = da; + list_add_tail(&bf->list, &sc->rxbuf); + } + + INIT_LIST_HEAD(&sc->txbuf); + sc->txbuf_len = ATH_TXBUF; + for (i = 0; i < ATH_TXBUF; i++, bf++, ds++, + da += sizeof(*ds)) { + bf->desc = ds; + bf->daddr = da; + list_add_tail(&bf->list, &sc->txbuf); + } + + /* beacon buffer */ + bf->desc = ds; + bf->daddr = da; + sc->bbuf = bf; + + return 0; +err_free: + pci_free_consistent(pdev, sc->desc_len, sc->desc, sc->desc_daddr); +err: + sc->desc = NULL; + return ret; +} + +static void +ath5k_desc_free(struct ath5k_softc *sc, struct pci_dev *pdev) +{ + struct ath5k_buf *bf; + + ath5k_txbuf_free(sc, sc->bbuf); + list_for_each_entry(bf, &sc->txbuf, list) + ath5k_txbuf_free(sc, bf); + list_for_each_entry(bf, &sc->rxbuf, list) + ath5k_txbuf_free(sc, bf); + + /* Free memory associated with all descriptors */ + pci_free_consistent(pdev, sc->desc_len, sc->desc, sc->desc_daddr); + + kfree(sc->bufptr); + sc->bufptr = NULL; +} + + + + + +/**************\ +* Queues setup * +\**************/ + +static struct ath5k_txq * +ath5k_txq_setup(struct ath5k_softc *sc, + int qtype, int subtype) +{ + struct ath5k_hw *ah = sc->ah; + struct ath5k_txq *txq; + struct ath5k_txq_info qi = { + .tqi_subtype = subtype, + .tqi_aifs = AR5K_TXQ_USEDEFAULT, + .tqi_cw_min = AR5K_TXQ_USEDEFAULT, + .tqi_cw_max = AR5K_TXQ_USEDEFAULT + }; + int qnum; + + /* + * 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 + * EOL to reap descriptors. Note that this is done to + * reduce interrupt load and this only defers reaping + * descriptors, never transmitting frames. Aside from + * reducing interrupts this also permits more concurrency. + * The only potential downside is if the tx queue backs + * up in which case the top half of the kernel may backup + * due to a lack of tx descriptors. + */ + qi.tqi_flags = AR5K_TXQ_FLAG_TXEOLINT_ENABLE | + AR5K_TXQ_FLAG_TXDESCINT_ENABLE; + qnum = ath5k_hw_setup_tx_queue(ah, qtype, &qi); + if (qnum < 0) { + /* + * NB: don't print a message, this happens + * normally on parts with too few tx queues + */ + return ERR_PTR(qnum); + } + if (qnum >= ARRAY_SIZE(sc->txqs)) { + ATH5K_ERR(sc, "hw qnum %u out of range, max %tu!\n", + qnum, ARRAY_SIZE(sc->txqs)); + ath5k_hw_release_tx_queue(ah, qnum); + return ERR_PTR(-EINVAL); + } + txq = &sc->txqs[qnum]; + if (!txq->setup) { + txq->qnum = qnum; + txq->link = NULL; + INIT_LIST_HEAD(&txq->q); + spin_lock_init(&txq->lock); + txq->setup = true; + } + return &sc->txqs[qnum]; +} + +static int +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, + /* NB: for dynamic turbo, don't enable any other interrupts */ + .tqi_flags = AR5K_TXQ_FLAG_TXDESCINT_ENABLE + }; + + return ath5k_hw_setup_tx_queue(ah, AR5K_TX_QUEUE_BEACON, &qi); +} + +static int +ath5k_beaconq_config(struct ath5k_softc *sc) +{ + struct ath5k_hw *ah = sc->ah; + struct ath5k_txq_info qi; + int ret; + + ret = ath5k_hw_get_tx_queueprops(ah, sc->bhalq, &qi); + if (ret) + return ret; + if (sc->opmode == IEEE80211_IF_TYPE_AP) { + /* + * Always burst out beacon and CAB traffic + * (aifs = cwmin = cwmax = 0) + */ + qi.tqi_aifs = 0; + qi.tqi_cw_min = 0; + qi.tqi_cw_max = 0; + } else if (sc->opmode == IEEE80211_IF_TYPE_IBSS) { + /* + * Adhoc mode; backoff between 0 and (2 * cw_min). + */ + qi.tqi_aifs = 0; + qi.tqi_cw_min = 0; + qi.tqi_cw_max = 2 * ah->ah_cw_min; + } + + ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, + "beacon queueprops tqi_aifs:%d tqi_cw_min:%d tqi_cw_max:%d\n", + qi.tqi_aifs, qi.tqi_cw_min, qi.tqi_cw_max); + + ret = ath5k_hw_setup_tx_queueprops(ah, sc->bhalq, &qi); + if (ret) { + ATH5K_ERR(sc, "%s: unable to update parameters for beacon " + "hardware queue!\n", __func__); + return ret; + } + + return ath5k_hw_reset_tx_queue(ah, sc->bhalq); /* push to h/w */; +} + +static void +ath5k_txq_drainq(struct ath5k_softc *sc, struct ath5k_txq *txq) +{ + struct ath5k_buf *bf, *bf0; + + /* + * 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, !sc->ah->ah_proc_tx_desc(sc->ah, + bf->desc)); + + ath5k_txbuf_free(sc, bf); + + spin_lock_bh(&sc->txbuflock); + sc->tx_stats.data[txq->qnum].len--; + list_move_tail(&bf->list, &sc->txbuf); + sc->txbuf_len++; + spin_unlock_bh(&sc->txbuflock); + } + txq->link = NULL; + spin_unlock_bh(&txq->lock); +} + +/* + * 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; + + /* 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_tx_buf(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_tx_buf(ah, + sc->txqs[i].qnum), + sc->txqs[i].link); + } + } + ieee80211_start_queues(sc->hw); /* XXX move to callers */ + + for (i = 0; i < ARRAY_SIZE(sc->txqs); i++) + if (sc->txqs[i].setup) + ath5k_txq_drainq(sc, &sc->txqs[i]); +} + +static void +ath5k_txq_release(struct ath5k_softc *sc) +{ + struct ath5k_txq *txq = sc->txqs; + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(sc->txqs); i++, txq++) + if (txq->setup) { + ath5k_hw_release_tx_queue(sc->ah, txq->qnum); + txq->setup = false; + } +} + + + + +/*************\ +* RX Handling * +\*************/ + +/* + * Enable the receive h/w following a reset. + */ +static int +ath5k_rx_start(struct ath5k_softc *sc) +{ + struct ath5k_hw *ah = sc->ah; + struct ath5k_buf *bf; + int ret; + + sc->rxbufsize = roundup(IEEE80211_MAX_LEN, sc->cachelsz); + + ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "cachelsz %u rxbufsize %u\n", + sc->cachelsz, sc->rxbufsize); + + sc->rxlink = NULL; + + spin_lock_bh(&sc->rxbuflock); + list_for_each_entry(bf, &sc->rxbuf, list) { + ret = ath5k_rxbuf_setup(sc, bf); + if (ret != 0) { + spin_unlock_bh(&sc->rxbuflock); + goto err; + } + } + bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list); + spin_unlock_bh(&sc->rxbuflock); + + ath5k_hw_put_rx_buf(ah, bf->daddr); + ath5k_hw_start_rx(ah); /* enable recv descriptors */ + ath5k_mode_setup(sc); /* set filters, etc. */ + ath5k_hw_start_rx_pcu(ah); /* re-enable PCU/DMA engine */ + + return 0; +err: + return ret; +} + +/* + * Disable the receive h/w in preparation for a reset. + */ +static void +ath5k_rx_stop(struct ath5k_softc *sc) +{ + struct ath5k_hw *ah = sc->ah; + + ath5k_hw_stop_pcu_recv(ah); /* disable PCU */ + ath5k_hw_set_rx_filter(ah, 0); /* clear recv filter */ + ath5k_hw_stop_rx_dma(ah); /* disable DMA engine */ + mdelay(3); /* 3ms is long enough for 1 frame */ + + ath5k_debug_printrxbuffs(sc, ah); + + sc->rxlink = NULL; /* just in case */ +} + +static unsigned int +ath5k_rx_decrypted(struct ath5k_softc *sc, struct ath5k_desc *ds, + struct sk_buff *skb) +{ + struct ieee80211_hdr *hdr = (void *)skb->data; + unsigned int keyix, hlen = ieee80211_get_hdrlen_from_skb(skb); + + if (!(ds->ds_rxstat.rs_status & AR5K_RXERR_DECRYPT) && + ds->ds_rxstat.rs_keyix != AR5K_RXKEYIX_INVALID) + return RX_FLAG_DECRYPTED; + + /* Apparently when a default key is used to decrypt the packet + the hw does not set the index used to decrypt. In such cases + get the index from the packet. */ + if ((le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_PROTECTED) && + !(ds->ds_rxstat.rs_status & AR5K_RXERR_DECRYPT) && + skb->len >= hlen + 4) { + keyix = skb->data[hlen + 3] >> 6; + + if (test_bit(keyix, sc->keymap)) + return RX_FLAG_DECRYPTED; + } + + return 0; +} + + +static void +ath5k_check_ibss_hw_merge(struct ath5k_softc *sc, struct sk_buff *skb) +{ + u32 hw_tu; + struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; + + if ((mgmt->frame_control & IEEE80211_FCTL_FTYPE) == + IEEE80211_FTYPE_MGMT && + (mgmt->frame_control & IEEE80211_FCTL_STYPE) == + IEEE80211_STYPE_BEACON && + mgmt->u.beacon.capab_info & WLAN_CAPABILITY_IBSS && + memcmp(mgmt->bssid, sc->ah->ah_bssid, ETH_ALEN) == 0) { + /* + * Received an IBSS beacon with the same BSSID. Hardware might + * have updated the TSF, check if we need to update timers. + */ + hw_tu = TSF_TO_TU(ath5k_hw_get_tsf64(sc->ah)); + if (hw_tu >= sc->nexttbtt) { + ath5k_beacon_update_timers(sc, + mgmt->u.beacon.timestamp); + ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, + "detected HW merge from received beacon\n"); + } + } +} + + +static void +ath5k_tasklet_rx(unsigned long data) +{ + struct ieee80211_rx_status rxs = {}; + struct sk_buff *skb; + struct ath5k_softc *sc = (void *)data; + struct ath5k_buf *bf; + struct ath5k_desc *ds; + u16 len; + u8 stat; + int ret; + int hdrlen; + int pad; + + spin_lock(&sc->rxbuflock); + do { + if (unlikely(list_empty(&sc->rxbuf))) { + ATH5K_WARN(sc, "empty rx buf pool\n"); + break; + } + bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list); + BUG_ON(bf->skb == NULL); + skb = bf->skb; + ds = bf->desc; + + /* TODO only one segment */ + pci_dma_sync_single_for_cpu(sc->pdev, sc->desc_daddr, + sc->desc_len, PCI_DMA_FROMDEVICE); + + if (unlikely(ds->ds_link == bf->daddr)) /* this is the end */ + break; + + ret = sc->ah->ah_proc_rx_desc(sc->ah, ds); + if (unlikely(ret == -EINPROGRESS)) + break; + else if (unlikely(ret)) { + ATH5K_ERR(sc, "error in processing rx descriptor\n"); + return; + } + + if (unlikely(ds->ds_rxstat.rs_more)) { + ATH5K_WARN(sc, "unsupported jumbo\n"); + goto next; + } + + stat = ds->ds_rxstat.rs_status; + if (unlikely(stat)) { + if (stat & AR5K_RXERR_PHY) + goto next; + if (stat & AR5K_RXERR_DECRYPT) { + /* + * Decrypt error. If the error occurred + * because there was no hardware key, then + * let the frame through so the upper layers + * can process it. This is necessary for 5210 + * parts which have no way to setup a ``clear'' + * key cache entry. + * + * XXX do key cache faulting + */ + if (ds->ds_rxstat.rs_keyix == + AR5K_RXKEYIX_INVALID && + !(stat & AR5K_RXERR_CRC)) + goto accept; + } + if (stat & AR5K_RXERR_MIC) { + rxs.flag |= RX_FLAG_MMIC_ERROR; + goto accept; + } + + /* let crypto-error packets fall through in MNTR */ + if ((stat & ~(AR5K_RXERR_DECRYPT|AR5K_RXERR_MIC)) || + sc->opmode != IEEE80211_IF_TYPE_MNTR) + goto next; + } +accept: + len = ds->ds_rxstat.rs_datalen; + pci_dma_sync_single_for_cpu(sc->pdev, bf->skbaddr, len, + PCI_DMA_FROMDEVICE); + pci_unmap_single(sc->pdev, bf->skbaddr, sc->rxbufsize, + PCI_DMA_FROMDEVICE); + bf->skb = NULL; + + skb_put(skb, len); + + /* + * the hardware adds a padding to 4 byte boundaries between + * the header and the payload data if the header length is + * not multiples of 4 - remove it + */ + hdrlen = ieee80211_get_hdrlen_from_skb(skb); + if (hdrlen & 3) { + pad = hdrlen % 4; + memmove(skb->data + pad, skb->data, hdrlen); + skb_pull(skb, pad); + } + + /* + * always extend the mac timestamp, since this information is + * also needed for proper IBSS merging. + * + * XXX: it might be too late to do it here, since rs_tstamp is + * 15bit only. that means TSF extension has to be done within + * 32768usec (about 32ms). it might be necessary to move this to + * the interrupt handler, like it is done in madwifi. + */ + rxs.mactime = ath5k_extend_tsf(sc->ah, ds->ds_rxstat.rs_tstamp); + rxs.flag |= RX_FLAG_TSFT; + + rxs.freq = sc->curchan->freq; + rxs.channel = sc->curchan->chan; + rxs.phymode = sc->curmode; + + /* + * signal quality: + * the names here are misleading and the usage of these + * values by iwconfig makes it even worse + */ + /* noise floor in dBm, from the last noise calibration */ + rxs.noise = sc->ah->ah_noise_floor; + /* signal level in dBm */ + rxs.ssi = rxs.noise + ds->ds_rxstat.rs_rssi; + /* + * "signal" is actually displayed as Link Quality by iwconfig + * we provide a percentage based on rssi (assuming max rssi 64) + */ + rxs.signal = ds->ds_rxstat.rs_rssi * 100 / 64; + + rxs.antenna = ds->ds_rxstat.rs_antenna; + rxs.rate = ds->ds_rxstat.rs_rate; + rxs.flag |= ath5k_rx_decrypted(sc, ds, skb); + + ath5k_debug_dump_skb(sc, skb, "RX ", 0); + + /* check beacons in IBSS mode */ + if (sc->opmode == IEEE80211_IF_TYPE_IBSS) + ath5k_check_ibss_hw_merge(sc, skb); + + __ieee80211_rx(sc->hw, skb, &rxs); + sc->led_rxrate = ds->ds_rxstat.rs_rate; + ath5k_led_event(sc, ATH_LED_RX); +next: + list_move_tail(&bf->list, &sc->rxbuf); + } while (ath5k_rxbuf_setup(sc, bf) == 0); + spin_unlock(&sc->rxbuflock); +} + + + + +/*************\ +* TX Handling * +\*************/ + +static void +ath5k_tx_processq(struct ath5k_softc *sc, struct ath5k_txq *txq) +{ + struct ieee80211_tx_status txs = {}; + struct ath5k_buf *bf, *bf0; + struct ath5k_desc *ds; + struct sk_buff *skb; + int ret; + + spin_lock(&txq->lock); + list_for_each_entry_safe(bf, bf0, &txq->q, list) { + ds = bf->desc; + + /* TODO only one segment */ + pci_dma_sync_single_for_cpu(sc->pdev, sc->desc_daddr, + sc->desc_len, PCI_DMA_FROMDEVICE); + ret = sc->ah->ah_proc_tx_desc(sc->ah, ds); + if (unlikely(ret == -EINPROGRESS)) + break; + else if (unlikely(ret)) { + ATH5K_ERR(sc, "error %d while processing queue %u\n", + ret, txq->qnum); + break; + } + + skb = bf->skb; + bf->skb = NULL; + pci_unmap_single(sc->pdev, bf->skbaddr, skb->len, + PCI_DMA_TODEVICE); + + txs.control = bf->ctl; + txs.retry_count = ds->ds_txstat.ts_shortretry + + ds->ds_txstat.ts_longretry / 6; + if (unlikely(ds->ds_txstat.ts_status)) { + sc->ll_stats.dot11ACKFailureCount++; + if (ds->ds_txstat.ts_status & AR5K_TXERR_XRETRY) + txs.excessive_retries = 1; + else if (ds->ds_txstat.ts_status & AR5K_TXERR_FILT) + txs.flags |= IEEE80211_TX_STATUS_TX_FILTERED; + } else { + txs.flags |= IEEE80211_TX_STATUS_ACK; + txs.ack_signal = ds->ds_txstat.ts_rssi; + } + + ieee80211_tx_status(sc->hw, skb, &txs); + sc->tx_stats.data[txq->qnum].count++; + + spin_lock(&sc->txbuflock); + sc->tx_stats.data[txq->qnum].len--; + list_move_tail(&bf->list, &sc->txbuf); + sc->txbuf_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); +} + +static void +ath5k_tasklet_tx(unsigned long data) +{ + struct ath5k_softc *sc = (void *)data; + + ath5k_tx_processq(sc, sc->txq); + + ath5k_led_event(sc, ATH_LED_TX); +} + + + + +/*****************\ +* Beacon handling * +\*****************/ + +/* + * Setup the beacon frame for transmit. + */ +static int +ath5k_beacon_setup(struct ath5k_softc *sc, struct ath5k_buf *bf, + struct ieee80211_tx_control *ctl) +{ + struct sk_buff *skb = bf->skb; + struct ath5k_hw *ah = sc->ah; + struct ath5k_desc *ds; + int ret, antenna = 0; + u32 flags; + + bf->skbaddr = pci_map_single(sc->pdev, skb->data, skb->len, + PCI_DMA_TODEVICE); + 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(bf->skbaddr)) { + ATH5K_ERR(sc, "beacon DMA mapping failed\n"); + return -EIO; + } + + ds = bf->desc; + + flags = AR5K_TXDESC_NOACK; + if (sc->opmode == IEEE80211_IF_TYPE_IBSS && ath5k_hw_hasveol(ah)) { + ds->ds_link = bf->daddr; /* self-linked */ + flags |= AR5K_TXDESC_VEOL; + /* + * Let hardware handle antenna switching if txantenna is not set + */ + } else { + ds->ds_link = 0; + /* + * Switch antenna every 4 beacons if txantenna is not set + * XXX assumes two antennas + */ + if (antenna == 0) + antenna = sc->bsent & 4 ? 2 : 1; + } + + ds->ds_data = bf->skbaddr; + ret = ah->ah_setup_tx_desc(ah, ds, skb->len + FCS_LEN, + ieee80211_get_hdrlen_from_skb(skb), + AR5K_PKT_TYPE_BEACON, (ctl->power_level * 2), ctl->tx_rate, 1, + AR5K_TXKEYIX_INVALID, antenna, flags, 0, 0); + if (ret) + goto err_unmap; + + return 0; +err_unmap: + pci_unmap_single(sc->pdev, bf->skbaddr, skb->len, PCI_DMA_TODEVICE); + 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 usually called from interrupt context (ath5k_intr()) + * but also from ath5k_beacon_config() in IBSS mode which in turn + * can be called from a tasklet and user context + */ +static void +ath5k_beacon_send(struct ath5k_softc *sc) +{ + struct ath5k_buf *bf = sc->bbuf; + struct ath5k_hw *ah = sc->ah; + + ATH5K_DBG(sc, ATH5K_DEBUG_BEACON_PROC, "in beacon_send\n"); + + if (unlikely(bf->skb == NULL || sc->opmode == IEEE80211_IF_TYPE_STA || + sc->opmode == IEEE80211_IF_TYPE_MNTR)) { + 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_PROC, + "missed %u consecutive beacons\n", sc->bmisscount); + if (sc->bmisscount > 3) { /* NB: 3 is a guess */ + ATH5K_DBG(sc, ATH5K_DEBUG_BEACON_PROC, + "stuck beacon time (%u missed)\n", + sc->bmisscount); + tasklet_schedule(&sc->restq); + } + return; + } + if (unlikely(sc->bmisscount != 0)) { + ATH5K_DBG(sc, ATH5K_DEBUG_BEACON_PROC, + "resume beacon xmit after %u misses\n", + sc->bmisscount); + sc->bmisscount = 0; + } + + /* + * 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 stop?\n", sc->bhalq); + /* NB: hw still stops DMA, so proceed */ + } + pci_dma_sync_single_for_cpu(sc->pdev, bf->skbaddr, bf->skb->len, + PCI_DMA_TODEVICE); + + ath5k_hw_put_tx_buf(ah, sc->bhalq, bf->daddr); + ath5k_hw_tx_start(ah, sc->bhalq); + ATH5K_DBG(sc, ATH5K_DEBUG_BEACON_PROC, "TXDP[%u] = %llx (%p)\n", + sc->bhalq, (unsigned long long)bf->daddr, bf->desc); + + 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 HW merge 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 (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 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); + } +#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", + bc_tsf, 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 + * + * When operating in station mode we want to receive a BMISS interrupt when we + * stop seeing beacons from the AP we've associated with so we can look for + * another AP to associate with. + * + * In IBSS mode we use a self-linked tx descriptor if possible. We enable SWBA + * interrupts to detect HW merges only. + * + * AP mode is missing. + */ +static void +ath5k_beacon_config(struct ath5k_softc *sc) +{ + struct ath5k_hw *ah = sc->ah; + + ath5k_hw_set_intr(ah, 0); + sc->bmisscount = 0; + + if (sc->opmode == IEEE80211_IF_TYPE_STA) { + sc->imask |= AR5K_INT_BMISS; + } else if (sc->opmode == IEEE80211_IF_TYPE_IBSS) { + /* + * 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 HW merges (automatic TSF updates). + */ + ath5k_beaconq_config(sc); + + sc->imask |= AR5K_INT_SWBA; + + if (ath5k_hw_hasveol(ah)) + ath5k_beacon_send(sc); + } + /* TODO else AP */ + + ath5k_hw_set_intr(ah, sc->imask); +} + + +/********************\ +* Interrupt handling * +\********************/ + +static int +ath5k_init(struct ath5k_softc *sc) +{ + int ret; + + mutex_lock(&sc->lock); + + ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "mode %d\n", sc->opmode); + + /* + * Stop anything previously setup. This is safe + * no matter this is the first time through or not. + */ + ath5k_stop_locked(sc); + + /* + * The basic interface to setting the hardware in a good + * state is ``reset''. On return the hardware is known to + * be powered up and with interrupts disabled. This must + * be followed by initialization of the appropriate bits + * and then setup of the interrupt mask. + */ + sc->curchan = sc->hw->conf.chan; + ret = ath5k_hw_reset(sc->ah, sc->opmode, sc->curchan, false); + if (ret) { + ATH5K_ERR(sc, "unable to reset hardware: %d\n", ret); + goto done; + } + /* + * This is needed only to setup initial state + * but it's best done after a reset. + */ + ath5k_hw_set_txpower_limit(sc->ah, 0); + + /* + * Setup the hardware after reset: the key cache + * is filled as needed and the receive engine is + * set going. Frame transmit is handled entirely + * in the frame output path; there's nothing to do + * here except setup the interrupt mask. + */ + ret = ath5k_rx_start(sc); + if (ret) + goto done; + + /* + * Enable interrupts. + */ + sc->imask = AR5K_INT_RX | AR5K_INT_TX | AR5K_INT_RXEOL | + AR5K_INT_RXORN | AR5K_INT_FATAL | AR5K_INT_GLOBAL; + + ath5k_hw_set_intr(sc->ah, sc->imask); + /* Set ack to be sent at low bit-rates */ + ath5k_hw_set_ack_bitrate_high(sc->ah, false); + + mod_timer(&sc->calib_tim, round_jiffies(jiffies + + msecs_to_jiffies(ath5k_calinterval * 1000))); + + ret = 0; +done: + 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)) { + if (test_bit(ATH_STAT_LEDSOFT, sc->status)) { + del_timer_sync(&sc->led_tim); + ath5k_hw_set_gpio(ah, sc->led_pin, !sc->led_on); + __clear_bit(ATH_STAT_LEDBLINKING, sc->status); + } + ath5k_hw_set_intr(ah, 0); + } + ath5k_txq_cleanup(sc); + if (!test_bit(ATH_STAT_INVALID, sc->status)) { + ath5k_rx_stop(sc); + ath5k_hw_phy_disable(ah); + } else + sc->rxlink = NULL; + + return 0; +} + +/* + * Stop the device, grabbing the top-level lock to protect + * against concurrent entry through ath5k_init (which can happen + * if another thread does a system call and the thread doing the + * stop is preempted). + */ +static int +ath5k_stop_hw(struct ath5k_softc *sc) +{ + int ret; + + mutex_lock(&sc->lock); + ret = ath5k_stop_locked(sc); + if (ret == 0 && !test_bit(ATH_STAT_INVALID, sc->status)) { + /* + * Set the chip in full sleep mode. Note that we are + * careful to do this only when bringing the interface + * completely to a stop. When the chip is in this state + * it must be carefully woken up or references to + * registers in the PCI clock domain may freeze the bus + * (and system). This varies by chip and is mostly an + * issue with newer parts that go to sleep more quickly. + */ + if (sc->ah->ah_mac_srev >= 0x78) { + /* + * XXX + * don't put newer MAC revisions > 7.8 to sleep because + * of the above mentioned problems + */ + ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "mac version > 7.8, " + "not putting device to sleep\n"); + } else { + ATH5K_DBG(sc, ATH5K_DEBUG_RESET, + "putting device to full sleep\n"); + ath5k_hw_set_power(sc->ah, AR5K_PM_FULL_SLEEP, true, 0); + } + } + ath5k_txbuf_free(sc, sc->bbuf); + mutex_unlock(&sc->lock); + + del_timer_sync(&sc->calib_tim); + + return ret; +} + +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; + + if (unlikely(test_bit(ATH_STAT_INVALID, sc->status) || + !ath5k_hw_is_intr_pending(ah))) + return IRQ_NONE; + + do { + /* + * Figure out the reason(s) for the interrupt. Note + * that get_isr returns a pseudo-ISR that may include + * bits we haven't explicitly enabled so we mask the + * value to insure we only process bits we requested. + */ + 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); + status &= sc->imask; /* discard unasked for bits */ + if (unlikely(status & AR5K_INT_FATAL)) { + /* + * Fatal errors are unrecoverable. + * Typically these are caused by DMA errors. + */ + tasklet_schedule(&sc->restq); + } else if (unlikely(status & AR5K_INT_RXORN)) { + tasklet_schedule(&sc->restq); + } else { + if (status & AR5K_INT_SWBA) { + /* + * Software beacon alert--time to send a beacon. + * Handle beacon transmission directly; deferring + * this is too slow to meet timing constraints + * under load. + * + * In IBSS mode we use this interrupt just to + * keep track of the next TBTT (target beacon + * transmission time) in order to detect hardware + * merges (TSF updates). + */ + if (sc->opmode == IEEE80211_IF_TYPE_IBSS) { + /* XXX: only if VEOL suppported */ + u64 tsf = ath5k_hw_get_tsf64(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), tsf); + } else { + ath5k_beacon_send(sc); + } + } + 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->rxlink = NULL; + } + if (status & AR5K_INT_TXURN) { + /* bump tx trigger level */ + ath5k_hw_update_tx_triglevel(ah, true); + } + if (status & AR5K_INT_RX) + tasklet_schedule(&sc->rxtq); + if (status & AR5K_INT_TX) + tasklet_schedule(&sc->txtq); + if (status & AR5K_INT_BMISS) { + } + if (status & AR5K_INT_MIB) { + /* TODO */ + } + } + } while (ath5k_hw_is_intr_pending(ah) && counter-- > 0); + + if (unlikely(!counter)) + ATH5K_WARN(sc, "too many interrupts, giving up for now\n"); + + return IRQ_HANDLED; +} + +static void +ath5k_tasklet_reset(unsigned long data) +{ + struct ath5k_softc *sc = (void *)data; + + ath5k_reset(sc->hw); +} + +/* + * Periodically recalibrate the PHY to account + * for temperature/environment changes. + */ +static void +ath5k_calibrate(unsigned long data) +{ + struct ath5k_softc *sc = (void *)data; + struct ath5k_hw *ah = sc->ah; + + ATH5K_DBG(sc, ATH5K_DEBUG_CALIBRATE, "channel %u/%x\n", + sc->curchan->chan, sc->curchan->val); + + if (ath5k_hw_get_rf_gain(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"); + ath5k_reset(sc->hw); + } + if (ath5k_hw_phy_calibrate(ah, sc->curchan)) + ATH5K_ERR(sc, "calibration of channel %u failed\n", + sc->curchan->chan); + + mod_timer(&sc->calib_tim, round_jiffies(jiffies + + msecs_to_jiffies(ath5k_calinterval * 1000))); +} + + + +/***************\ +* LED functions * +\***************/ + +static void +ath5k_led_off(unsigned long data) +{ + struct ath5k_softc *sc = (void *)data; + + if (test_bit(ATH_STAT_LEDENDBLINK, sc->status)) + __clear_bit(ATH_STAT_LEDBLINKING, sc->status); + else { + __set_bit(ATH_STAT_LEDENDBLINK, sc->status); + ath5k_hw_set_gpio(sc->ah, sc->led_pin, !sc->led_on); + mod_timer(&sc->led_tim, jiffies + sc->led_off); + } +} + +/* + * Blink the LED according to the specified on/off times. + */ +static void +ath5k_led_blink(struct ath5k_softc *sc, unsigned int on, + unsigned int off) +{ + ATH5K_DBG(sc, ATH5K_DEBUG_LED, "on %u off %u\n", on, off); + ath5k_hw_set_gpio(sc->ah, sc->led_pin, sc->led_on); + __set_bit(ATH_STAT_LEDBLINKING, sc->status); + __clear_bit(ATH_STAT_LEDENDBLINK, sc->status); + sc->led_off = off; + mod_timer(&sc->led_tim, jiffies + on); +} + +static void +ath5k_led_event(struct ath5k_softc *sc, int event) +{ + if (likely(!test_bit(ATH_STAT_LEDSOFT, sc->status))) + return; + if (unlikely(test_bit(ATH_STAT_LEDBLINKING, sc->status))) + return; /* don't interrupt active blink */ + switch (event) { + case ATH_LED_TX: + ath5k_led_blink(sc, sc->hwmap[sc->led_txrate].ledon, + sc->hwmap[sc->led_txrate].ledoff); + break; + case ATH_LED_RX: + ath5k_led_blink(sc, sc->hwmap[sc->led_rxrate].ledon, + sc->hwmap[sc->led_rxrate].ledoff); + break; + } +} + + + + +/********************\ +* Mac80211 functions * +\********************/ + +static int +ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb, + struct ieee80211_tx_control *ctl) +{ + struct ath5k_softc *sc = hw->priv; + struct ath5k_buf *bf; + unsigned long flags; + int hdrlen; + int pad; + + ath5k_debug_dump_skb(sc, skb, "TX ", 1); + + if (sc->opmode == IEEE80211_IF_TYPE_MNTR) + ATH5K_DBG(sc, ATH5K_DEBUG_XMIT, "tx in monitor (scan?)\n"); + + /* + * the hardware expects the header padded to 4 byte boundaries + * if this is not the case we add the padding after the header + */ + hdrlen = ieee80211_get_hdrlen_from_skb(skb); + if (hdrlen & 3) { + pad = hdrlen % 4; + if (skb_headroom(skb) < pad) { + ATH5K_ERR(sc, "tx hdrlen not %%4: %d not enough" + " headroom to pad %d\n", hdrlen, pad); + return -1; + } + skb_push(skb, pad); + memmove(skb->data, skb->data+pad, hdrlen); + } + + sc->led_txrate = ctl->tx_rate; + + 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, ctl->queue); + return -1; + } + 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, ctl)) { + 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); + dev_kfree_skb_any(skb); + return 0; + } + + return 0; +} + +static int +ath5k_reset(struct ieee80211_hw *hw) +{ + struct ath5k_softc *sc = hw->priv; + struct ath5k_hw *ah = sc->ah; + int ret; + + ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "resetting\n"); + /* + * Convert to a hw channel description with the flags + * constrained to reflect the current operating mode. + */ + sc->curchan = hw->conf.chan; + + ath5k_hw_set_intr(ah, 0); + ath5k_txq_cleanup(sc); + ath5k_rx_stop(sc); + + ret = ath5k_hw_reset(ah, sc->opmode, sc->curchan, true); + if (unlikely(ret)) { + ATH5K_ERR(sc, "can't reset hardware (%d)\n", ret); + goto err; + } + ath5k_hw_set_txpower_limit(sc->ah, 0); + + ret = ath5k_rx_start(sc); + if (unlikely(ret)) { + ATH5K_ERR(sc, "can't start recv logic\n"); + goto err; + } + /* + * 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); */ + ath5k_beacon_config(sc); + /* intrs are started by ath5k_beacon_config */ + + ieee80211_wake_queues(hw); + + return 0; +err: + return ret; +} + +static int ath5k_start(struct ieee80211_hw *hw) +{ + return ath5k_init(hw->priv); +} + +static void ath5k_stop(struct ieee80211_hw *hw) +{ + ath5k_stop_hw(hw->priv); +} + +static int ath5k_add_interface(struct ieee80211_hw *hw, + struct ieee80211_if_init_conf *conf) +{ + struct ath5k_softc *sc = hw->priv; + int ret; + + mutex_lock(&sc->lock); + if (sc->vif) { + ret = 0; + goto end; + } + + sc->vif = conf->vif; + + switch (conf->type) { + case IEEE80211_IF_TYPE_STA: + case IEEE80211_IF_TYPE_IBSS: + case IEEE80211_IF_TYPE_MNTR: + sc->opmode = conf->type; + break; + default: + ret = -EOPNOTSUPP; + goto end; + } + ret = 0; +end: + mutex_unlock(&sc->lock); + return ret; +} + +static void +ath5k_remove_interface(struct ieee80211_hw *hw, + struct ieee80211_if_init_conf *conf) +{ + struct ath5k_softc *sc = hw->priv; + + mutex_lock(&sc->lock); + if (sc->vif != conf->vif) + goto end; + + sc->vif = NULL; +end: + mutex_unlock(&sc->lock); +} + +static int +ath5k_config(struct ieee80211_hw *hw, + struct ieee80211_conf *conf) +{ + struct ath5k_softc *sc = hw->priv; + + sc->bintval = conf->beacon_int; + ath5k_setcurmode(sc, conf->phymode); + + return ath5k_chan_set(sc, conf->chan); +} + +static int +ath5k_config_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif, + struct ieee80211_if_conf *conf) +{ + struct ath5k_softc *sc = hw->priv; + struct ath5k_hw *ah = sc->ah; + int ret; + + /* Set to a reasonable value. Note that this will + * be set to mac80211's value at ath5k_config(). */ + sc->bintval = 1000; + mutex_lock(&sc->lock); + if (sc->vif != vif) { + ret = -EIO; + goto unlock; + } + if (conf->bssid) { + /* Cache for later use during resets */ + memcpy(ah->ah_bssid, conf->bssid, ETH_ALEN); + /* XXX: assoc id is set to 0 for now, mac80211 doesn't have + * a clean way of letting us retrieve this yet. */ + ath5k_hw_set_associd(ah, ah->ah_bssid, 0); + } + mutex_unlock(&sc->lock); + + return ath5k_reset(hw); +unlock: + mutex_unlock(&sc->lock); + return ret; +} + +#define SUPPORTED_FIF_FLAGS \ + FIF_PROMISC_IN_BSS | FIF_ALLMULTI | FIF_FCSFAIL | \ + FIF_PLCPFAIL | FIF_CONTROL | FIF_OTHER_BSS | \ + FIF_BCN_PRBRESP_PROMISC +/* + * o always accept unicast, broadcast, and multicast traffic + * o multicast traffic for all BSSIDs will be enabled if mac80211 + * says it should be + * o maintain current state of phy ofdm or phy cck error reception. + * If the hardware detects any of these type of errors then + * ath5k_hw_get_rx_filter() will pass to us the respective + * hardware filters to be able to receive these type of frames. + * o probe request frames are accepted only when operating in + * hostap, adhoc, or monitor modes + * o enable promiscuous mode according to the interface state + * o accept beacons: + * - when operating in adhoc mode so the 802.11 layer creates + * node table entries for peers, + * - when operating in station mode for collecting rssi data when + * the station is otherwise quiet, or + * - when scanning + */ +static void ath5k_configure_filter(struct ieee80211_hw *hw, + unsigned int changed_flags, + unsigned int *new_flags, + int mc_count, struct dev_mc_list *mclist) +{ + struct ath5k_softc *sc = hw->priv; + struct ath5k_hw *ah = sc->ah; + u32 mfilt[2], val, rfilt; + u8 pos; + int i; + + mfilt[0] = 0; + mfilt[1] = 0; + + /* Only deal with supported flags */ + changed_flags &= SUPPORTED_FIF_FLAGS; + *new_flags &= SUPPORTED_FIF_FLAGS; + + /* If HW detects any phy or radar errors, leave those filters on. + * Also, always enable Unicast, Broadcasts and Multicast + * XXX: move unicast, bssid broadcasts and multicast to mac80211 */ + rfilt = (ath5k_hw_get_rx_filter(ah) & (AR5K_RX_FILTER_PHYERR)) | + (AR5K_RX_FILTER_UCAST | AR5K_RX_FILTER_BCAST | + AR5K_RX_FILTER_MCAST); + + if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS)) { + if (*new_flags & FIF_PROMISC_IN_BSS) { + rfilt |= AR5K_RX_FILTER_PROM; + __set_bit(ATH_STAT_PROMISC, sc->status); + } + else + __clear_bit(ATH_STAT_PROMISC, sc->status); + } + + /* Note, AR5K_RX_FILTER_MCAST is already enabled */ + if (*new_flags & FIF_ALLMULTI) { + mfilt[0] = ~0; + mfilt[1] = ~0; + } else { + for (i = 0; i < mc_count; i++) { + if (!mclist) + break; + /* calculate XOR of eight 6-bit values */ + val = LE_READ_4(mclist->dmi_addr + 0); + pos = (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val; + val = LE_READ_4(mclist->dmi_addr + 3); + pos ^= (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val; + pos &= 0x3f; + mfilt[pos / 32] |= (1 << (pos % 32)); + /* XXX: we might be able to just do this instead, + * but not sure, needs testing, if we do use this we'd + * neet to inform below to not reset the mcast */ + /* ath5k_hw_set_mcast_filterindex(ah, + * mclist->dmi_addr[5]); */ + mclist = mclist->next; + } + } + + /* This is the best we can do */ + if (*new_flags & (FIF_FCSFAIL | FIF_PLCPFAIL)) + 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; + + /* FIF_CONTROL doc says that if FIF_PROMISC_IN_BSS is not + * set we should only pass on control frames for this + * station. This needs testing. I believe right now this + * enables *all* control frames, which is OK.. but + * but we should see if we can improve on granularity */ + if (*new_flags & FIF_CONTROL) + rfilt |= AR5K_RX_FILTER_CONTROL; + + /* Additional settings per mode -- this is per ath5k */ + + /* XXX move these to mac80211, and add a beacon IFF flag to mac80211 */ + + if (sc->opmode == IEEE80211_IF_TYPE_MNTR) + rfilt |= AR5K_RX_FILTER_CONTROL | AR5K_RX_FILTER_BEACON | + AR5K_RX_FILTER_PROBEREQ | AR5K_RX_FILTER_PROM; + if (sc->opmode != IEEE80211_IF_TYPE_STA) + rfilt |= AR5K_RX_FILTER_PROBEREQ; + if (sc->opmode != IEEE80211_IF_TYPE_AP && + test_bit(ATH_STAT_PROMISC, sc->status)) + rfilt |= AR5K_RX_FILTER_PROM; + if (sc->opmode == IEEE80211_IF_TYPE_STA || + sc->opmode == IEEE80211_IF_TYPE_IBSS) { + rfilt |= AR5K_RX_FILTER_BEACON; + } + + /* Set filters */ + ath5k_hw_set_rx_filter(ah,rfilt); + + /* Set multicast bits */ + ath5k_hw_set_mcast_filter(ah, mfilt[0], mfilt[1]); + /* Set the cached hw filter flags, this will alter actually + * be set in HW */ + sc->filter_flags = rfilt; +} + +static int +ath5k_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, + const u8 *local_addr, const u8 *addr, + struct ieee80211_key_conf *key) +{ + struct ath5k_softc *sc = hw->priv; + int ret = 0; + + switch(key->alg) { + case ALG_WEP: + break; + case ALG_TKIP: + case ALG_CCMP: + return -EOPNOTSUPP; + default: + WARN_ON(1); + return -EINVAL; + } + + mutex_lock(&sc->lock); + + switch (cmd) { + case SET_KEY: + ret = ath5k_hw_set_key(sc->ah, key->keyidx, key, addr); + if (ret) { + ATH5K_ERR(sc, "can't set the key\n"); + goto unlock; + } + __set_bit(key->keyidx, sc->keymap); + key->hw_key_idx = key->keyidx; + break; + case DISABLE_KEY: + ath5k_hw_reset_key(sc->ah, key->keyidx); + __clear_bit(key->keyidx, sc->keymap); + break; + default: + ret = -EINVAL; + goto unlock; + } + +unlock: + mutex_unlock(&sc->lock); + return ret; +} + +static int +ath5k_get_stats(struct ieee80211_hw *hw, + struct ieee80211_low_level_stats *stats) +{ + struct ath5k_softc *sc = hw->priv; + + memcpy(stats, &sc->ll_stats, sizeof(sc->ll_stats)); + + return 0; +} + +static int +ath5k_get_tx_stats(struct ieee80211_hw *hw, + struct ieee80211_tx_queue_stats *stats) +{ + struct ath5k_softc *sc = hw->priv; + + memcpy(stats, &sc->tx_stats, sizeof(sc->tx_stats)); + + return 0; +} + +static u64 +ath5k_get_tsf(struct ieee80211_hw *hw) +{ + struct ath5k_softc *sc = hw->priv; + + return ath5k_hw_get_tsf64(sc->ah); +} + +static void +ath5k_reset_tsf(struct ieee80211_hw *hw) +{ + struct ath5k_softc *sc = hw->priv; + + /* + * in IBSS mode we need to update the beacon timers too. + * this will also reset the TSF if we call it with 0 + */ + if (sc->opmode == IEEE80211_IF_TYPE_IBSS) + ath5k_beacon_update_timers(sc, 0); + else + ath5k_hw_reset_tsf(sc->ah); +} + +static int +ath5k_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb, + struct ieee80211_tx_control *ctl) +{ + struct ath5k_softc *sc = hw->priv; + int ret; + + ath5k_debug_dump_skb(sc, skb, "BC ", 1); + + mutex_lock(&sc->lock); + + if (sc->opmode != IEEE80211_IF_TYPE_IBSS) { + ret = -EIO; + goto end; + } + + ath5k_txbuf_free(sc, sc->bbuf); + sc->bbuf->skb = skb; + ret = ath5k_beacon_setup(sc, sc->bbuf, ctl); + if (ret) + sc->bbuf->skb = NULL; + else + ath5k_beacon_config(sc); + +end: + mutex_unlock(&sc->lock); + return ret; +} + |