| /*- |
| * 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/module.h> |
| #include <linux/delay.h> |
| #include <linux/hardirq.h> |
| #include <linux/if.h> |
| #include <linux/io.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" |
| |
| static int ath5k_calinterval = 10; /* Calibrate PHY every 10 secs (TODO: Fixme) */ |
| static int modparam_nohwcrypt; |
| module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO); |
| MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption."); |
| |
| static int modparam_all_channels; |
| 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 const struct pci_device_id ath5k_pci_id_table[] = { |
| { 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 }, /* PCI-E cards */ |
| { PCI_VDEVICE(ATHEROS, 0x001d), .driver_data = AR5K_AR5212 }, /* 2417 Nala */ |
| { 0 } |
| }; |
| MODULE_DEVICE_TABLE(pci, ath5k_pci_id_table); |
| |
| /* Known SREVs */ |
| static const struct ath5k_srev_name srev_names[] = { |
| { "5210", AR5K_VERSION_MAC, AR5K_SREV_AR5210 }, |
| { "5311", AR5K_VERSION_MAC, AR5K_SREV_AR5311 }, |
| { "5311A", AR5K_VERSION_MAC, AR5K_SREV_AR5311A }, |
| { "5311B", AR5K_VERSION_MAC, AR5K_SREV_AR5311B }, |
| { "5211", AR5K_VERSION_MAC, AR5K_SREV_AR5211 }, |
| { "5212", AR5K_VERSION_MAC, AR5K_SREV_AR5212 }, |
| { "5213", AR5K_VERSION_MAC, AR5K_SREV_AR5213 }, |
| { "5213A", AR5K_VERSION_MAC, AR5K_SREV_AR5213A }, |
| { "2413", AR5K_VERSION_MAC, AR5K_SREV_AR2413 }, |
| { "2414", AR5K_VERSION_MAC, AR5K_SREV_AR2414 }, |
| { "5424", AR5K_VERSION_MAC, AR5K_SREV_AR5424 }, |
| { "5413", AR5K_VERSION_MAC, AR5K_SREV_AR5413 }, |
| { "5414", AR5K_VERSION_MAC, AR5K_SREV_AR5414 }, |
| { "2415", AR5K_VERSION_MAC, AR5K_SREV_AR2415 }, |
| { "5416", AR5K_VERSION_MAC, AR5K_SREV_AR5416 }, |
| { "5418", AR5K_VERSION_MAC, AR5K_SREV_AR5418 }, |
| { "2425", AR5K_VERSION_MAC, AR5K_SREV_AR2425 }, |
| { "2417", AR5K_VERSION_MAC, AR5K_SREV_AR2417 }, |
| { "xxxxx", AR5K_VERSION_MAC, AR5K_SREV_UNKNOWN }, |
| { "5110", AR5K_VERSION_RAD, AR5K_SREV_RAD_5110 }, |
| { "5111", AR5K_VERSION_RAD, AR5K_SREV_RAD_5111 }, |
| { "5111A", AR5K_VERSION_RAD, AR5K_SREV_RAD_5111A }, |
| { "2111", AR5K_VERSION_RAD, AR5K_SREV_RAD_2111 }, |
| { "5112", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112 }, |
| { "5112A", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112A }, |
| { "5112B", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112B }, |
| { "2112", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112 }, |
| { "2112A", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112A }, |
| { "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 }, |
| { "xxxxx", AR5K_VERSION_RAD, AR5K_SREV_UNKNOWN }, |
| }; |
| |
| static const struct ieee80211_rate ath5k_rates[] = { |
| { .bitrate = 10, |
| .hw_value = ATH5K_RATE_CODE_1M, }, |
| { .bitrate = 20, |
| .hw_value = ATH5K_RATE_CODE_2M, |
| .hw_value_short = ATH5K_RATE_CODE_2M | AR5K_SET_SHORT_PREAMBLE, |
| .flags = IEEE80211_RATE_SHORT_PREAMBLE }, |
| { .bitrate = 55, |
| .hw_value = ATH5K_RATE_CODE_5_5M, |
| .hw_value_short = ATH5K_RATE_CODE_5_5M | AR5K_SET_SHORT_PREAMBLE, |
| .flags = IEEE80211_RATE_SHORT_PREAMBLE }, |
| { .bitrate = 110, |
| .hw_value = ATH5K_RATE_CODE_11M, |
| .hw_value_short = ATH5K_RATE_CODE_11M | AR5K_SET_SHORT_PREAMBLE, |
| .flags = IEEE80211_RATE_SHORT_PREAMBLE }, |
| { .bitrate = 60, |
| .hw_value = ATH5K_RATE_CODE_6M, |
| .flags = 0 }, |
| { .bitrate = 90, |
| .hw_value = ATH5K_RATE_CODE_9M, |
| .flags = 0 }, |
| { .bitrate = 120, |
| .hw_value = ATH5K_RATE_CODE_12M, |
| .flags = 0 }, |
| { .bitrate = 180, |
| .hw_value = ATH5K_RATE_CODE_18M, |
| .flags = 0 }, |
| { .bitrate = 240, |
| .hw_value = ATH5K_RATE_CODE_24M, |
| .flags = 0 }, |
| { .bitrate = 360, |
| .hw_value = ATH5K_RATE_CODE_36M, |
| .flags = 0 }, |
| { .bitrate = 480, |
| .hw_value = ATH5K_RATE_CODE_48M, |
| .flags = 0 }, |
| { .bitrate = 540, |
| .hw_value = ATH5K_RATE_CODE_54M, |
| .flags = 0 }, |
| /* 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 |
| 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_driver = { |
| .name = KBUILD_MODNAME, |
| .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); |
| static int ath5k_reset(struct ath5k_softc *sc, struct ieee80211_channel *chan); |
| static int ath5k_reset_wake(struct ath5k_softc *sc); |
| 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, u32 changed); |
| 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, |
| 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_tx_stats(struct ieee80211_hw *hw, |
| struct ieee80211_tx_queue_stats *stats); |
| 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 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, |
| .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, |
| .set_tsf = ath5k_set_tsf, |
| .reset_tsf = ath5k_reset_tsf, |
| .bss_info_changed = ath5k_bss_info_changed, |
| }; |
| |
| /* |
| * 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); |
| 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_any(bf->skb); |
| bf->skb = NULL; |
| } |
| |
| static inline void ath5k_rxbuf_free(struct ath5k_softc *sc, |
| struct ath5k_buf *bf) |
| { |
| BUG_ON(!bf); |
| if (!bf->skb) |
| return; |
| pci_unmap_single(sc->pdev, bf->skbaddr, sc->rxbufsize, |
| PCI_DMA_FROMDEVICE); |
| dev_kfree_skb_any(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, |
| 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 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); |
| |
| /* |
| * Module init/exit functions |
| */ |
| static int __init |
| init_ath5k_pci(void) |
| { |
| int ret; |
| |
| ath5k_debug_init(); |
| |
| ret = pci_register_driver(&ath5k_pci_driver); |
| if (ret) { |
| printk(KERN_ERR "ath5k_pci: can't register pci driver\n"); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static void __exit |
| exit_ath5k_pci(void) |
| { |
| pci_unregister_driver(&ath5k_pci_driver); |
| |
| ath5k_debug_finish(); |
| } |
| |
| module_init(init_ath5k_pci); |
| module_exit(exit_ath5k_pci); |
| |
| |
| /********************\ |
| * PCI Initialization * |
| \********************/ |
| |
| static const char * |
| ath5k_chip_name(enum ath5k_srev_type type, u_int16_t val) |
| { |
| 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 & 0xf0) == srev_names[i].sr_val) |
| name = srev_names[i].sr_name; |
| |
| if ((val & 0xff) == srev_names[i].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_BIT_MASK(32)); |
| if (ret) { |
| dev_err(&pdev->dev, "32-bit DMA not available\n"); |
| goto err_dis; |
| } |
| |
| /* |
| * Cache line size is used to size and align various |
| * structures used to communicate with the hardware. |
| */ |
| pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz); |
| if (csz == 0) { |
| /* |
| * Linux 2.4.18 (at least) writes the cache line size |
| * register as a 16-bit wide register which is wrong. |
| * We must have this setup properly for rx buffer |
| * DMA to work so force a reasonable value here if it |
| * comes up zero. |
| */ |
| csz = L1_CACHE_BYTES / 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 | |
| IEEE80211_HW_SIGNAL_DBM | |
| IEEE80211_HW_NOISE_DBM; |
| |
| hw->wiphy->interface_modes = |
| BIT(NL80211_IFTYPE_AP) | |
| BIT(NL80211_IFTYPE_STATION) | |
| BIT(NL80211_IFTYPE_ADHOC) | |
| BIT(NL80211_IFTYPE_MESH_POINT); |
| |
| hw->extra_tx_headroom = 2; |
| hw->channel_change_time = 5000; |
| sc = hw->priv; |
| sc->hw = hw; |
| sc->pdev = pdev; |
| |
| ath5k_debug_init_device(sc); |
| |
| /* |
| * Mark the device as detached to avoid processing |
| * interrupts until setup is complete. |
| */ |
| __set_bit(ATH_STAT_INVALID, sc->status); |
| |
| sc->iobase = mem; /* So we can unmap it on detach */ |
| sc->cachelsz = csz * sizeof(u32); /* convert to bytes */ |
| sc->opmode = NL80211_IFTYPE_STATION; |
| mutex_init(&sc->lock); |
| spin_lock_init(&sc->rxbuflock); |
| spin_lock_init(&sc->txbuflock); |
| spin_lock_init(&sc->block); |
| |
| /* Set private data */ |
| pci_set_drvdata(pdev, hw); |
| |
| /* 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; |
| } |
| |
| /* set up multi-rate retry capabilities */ |
| if (sc->ah->ah_version == AR5K_AR5212) { |
| hw->max_rates = 4; |
| hw->max_rate_tries = 11; |
| } |
| |
| /* Finish private driver data initialization */ |
| ret = ath5k_attach(pdev, hw); |
| if (ret) |
| goto err_ah; |
| |
| ATH5K_INFO(sc, "Atheros AR%s chip found (MAC: 0x%x, PHY: 0x%x)\n", |
| ath5k_chip_name(AR5K_VERSION_MAC, sc->ah->ah_mac_srev), |
| sc->ah->ah_mac_srev, |
| sc->ah->ah_phy_revision); |
| |
| if (!sc->ah->ah_single_chip) { |
| /* Single chip radio (!RF5111) */ |
| if (sc->ah->ah_radio_5ghz_revision && |
| !sc->ah->ah_radio_2ghz_revision) { |
| /* No 5GHz support -> report 2GHz radio */ |
| if (!test_bit(AR5K_MODE_11A, |
| sc->ah->ah_capabilities.cap_mode)) { |
| ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n", |
| ath5k_chip_name(AR5K_VERSION_RAD, |
| sc->ah->ah_radio_5ghz_revision), |
| sc->ah->ah_radio_5ghz_revision); |
| /* No 2GHz support (5110 and some |
| * 5Ghz only cards) -> report 5Ghz radio */ |
| } else if (!test_bit(AR5K_MODE_11B, |
| sc->ah->ah_capabilities.cap_mode)) { |
| ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n", |
| ath5k_chip_name(AR5K_VERSION_RAD, |
| sc->ah->ah_radio_5ghz_revision), |
| sc->ah->ah_radio_5ghz_revision); |
| /* Multiband radio */ |
| } else { |
| ATH5K_INFO(sc, "RF%s multiband radio found" |
| " (0x%x)\n", |
| ath5k_chip_name(AR5K_VERSION_RAD, |
| sc->ah->ah_radio_5ghz_revision), |
| sc->ah->ah_radio_5ghz_revision); |
| } |
| } |
| /* Multi chip radio (RF5111 - RF2111) -> |
| * report both 2GHz/5GHz radios */ |
| else if (sc->ah->ah_radio_5ghz_revision && |
| sc->ah->ah_radio_2ghz_revision){ |
| ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n", |
| ath5k_chip_name(AR5K_VERSION_RAD, |
| sc->ah->ah_radio_5ghz_revision), |
| sc->ah->ah_radio_5ghz_revision); |
| ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n", |
| ath5k_chip_name(AR5K_VERSION_RAD, |
| sc->ah->ah_radio_2ghz_revision), |
| sc->ah->ah_radio_2ghz_revision); |
| } |
| } |
| |
| |
| /* 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: |
| 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_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; |
| |
| ath5k_led_off(sc); |
| |
| free_irq(pdev->irq, 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; |
| int err; |
| |
| pci_restore_state(pdev); |
| |
| err = pci_enable_device(pdev); |
| if (err) |
| return err; |
| |
| err = request_irq(pdev->irq, ath5k_intr, IRQF_SHARED, "ath", sc); |
| if (err) { |
| ATH5K_ERR(sc, "request_irq failed\n"); |
| goto err_no_irq; |
| } |
| |
| ath5k_led_enable(sc); |
| return 0; |
| |
| err_no_irq: |
| pci_disable_device(pdev); |
| return err; |
| } |
| #endif /* CONFIG_PM */ |
| |
| |
| /***********************\ |
| * Driver Initialization * |
| \***********************/ |
| |
| 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 *reg = &sc->ah->ah_regulatory; |
| |
| return ath_reg_notifier_apply(wiphy, request, reg); |
| } |
| |
| 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] = {}; |
| 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. |
| */ |
| ret = ah->ah_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); |
| |
| /* |
| * 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; |
| } |
| |
| /* 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); |
| |
| /* |
| * 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); |
| tasklet_init(&sc->beacontq, ath5k_tasklet_beacon, (unsigned long)sc); |
| setup_timer(&sc->calib_tim, ath5k_calibrate, (unsigned long)sc); |
| |
| 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; |
| } |
| |
| 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); |
| |
| ah->ah_regulatory.current_rd = |
| ah->ah_capabilities.cap_eeprom.ee_regdomain; |
| ret = ath_regd_init(&ah->ah_regulatory, hw->wiphy, ath5k_reg_notifier); |
| if (ret) { |
| ATH5K_ERR(sc, "can't initialize regulatory system\n"); |
| goto err_queues; |
| } |
| |
| ret = ieee80211_register_hw(hw); |
| if (ret) { |
| ATH5K_ERR(sc, "can't register ieee80211 hw\n"); |
| goto err_queues; |
| } |
| |
| if (!ath_is_world_regd(&sc->ah->ah_regulatory)) |
| regulatory_hint(hw->wiphy, sc->ah->ah_regulatory.alpha2); |
| |
| ath5k_init_leds(sc); |
| |
| return 0; |
| err_queues: |
| ath5k_txq_release(sc); |
| err_bhal: |
| ath5k_hw_release_tx_queue(ah, sc->bhalq); |
| err_desc: |
| ath5k_desc_free(sc, pdev); |
| err: |
| return ret; |
| } |
| |
| static void |
| ath5k_detach(struct pci_dev *pdev, struct ieee80211_hw *hw) |
| { |
| struct ath5k_softc *sc = hw->priv; |
| |
| /* |
| * NB: the order of these is important: |
| * o call the 802.11 layer before detaching ath5k_hw to |
| * 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); |
| |
| /* |
| * 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; |
| } |
| |
| /* |
| * 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)); |
| } |
| |
| 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; |
| |
| if (!test_bit(mode, ah->ah_modes)) |
| return 0; |
| |
| 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; |
| } |
| |
| for (i = 0, count = 0; i < size && max > 0; i++) { |
| ch = i + 1 ; |
| freq = ath5k_ieee2mhz(ch); |
| |
| /* Check if channel is supported by the chipset */ |
| if (!ath5k_channel_ok(ah, freq, chfreq)) |
| continue; |
| |
| if (!modparam_all_channels && !ath5k_is_standard_channel(ch)) |
| continue; |
| |
| /* 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; |
| } |
| |
| count++; |
| max--; |
| } |
| |
| return count; |
| } |
| |
| static void |
| ath5k_setup_rate_idx(struct ath5k_softc *sc, struct ieee80211_supported_band *b) |
| { |
| u8 i; |
| |
| for (i = 0; i < AR5K_MAX_RATES; i++) |
| sc->rate_idx[b->band][i] = -1; |
| |
| 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; |
| } |
| } |
| |
| 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; |
| |
| BUILD_BUG_ON(ARRAY_SIZE(sc->sbands) < IEEE80211_NUM_BANDS); |
| max_c = ARRAY_SIZE(sc->channels); |
| |
| /* 2GHz band */ |
| sband = &sc->sbands[IEEE80211_BAND_2GHZ]; |
| sband->band = IEEE80211_BAND_2GHZ; |
| sband->bitrates = &sc->rates[IEEE80211_BAND_2GHZ][0]; |
| |
| 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; |
| |
| 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. 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. |
| * |
| * Called with sc->lock. |
| */ |
| static int |
| ath5k_chan_set(struct ath5k_softc *sc, struct ieee80211_channel *chan) |
| { |
| ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "(%u MHz) -> (%u MHz)\n", |
| sc->curchan->center_freq, chan->center_freq); |
| |
| if (chan->center_freq != sc->curchan->center_freq || |
| chan->hw_value != sc->curchan->hw_value) { |
| |
| /* |
| * 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); |
| } |
| |
| return 0; |
| } |
| |
| 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); |
| |
| ath5k_hw_set_mcast_filter(ah, 0, 0); |
| 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 sk_buff *skb; |
| 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 (!skb) { |
| ATH5K_ERR(sc, "can't alloc skbuff of size %u\n", |
| sc->rxbufsize + sc->cachelsz - 1); |
| return NULL; |
| } |
| /* |
| * 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); |
| |
| *skb_addr = pci_map_single(sc->pdev, |
| skb->data, sc->rxbufsize, 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; |
| |
| 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 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; |
| ah->ah_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 ath5k_hw *ah = sc->ah; |
| struct ath5k_txq *txq = sc->txq; |
| struct ath5k_desc *ds = bf->desc; |
| struct sk_buff *skb = bf->skb; |
| struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| unsigned int pktlen, flags, keyidx = AR5K_TXKEYIX_INVALID; |
| struct ieee80211_rate *rate; |
| unsigned int mrr_rate[3], mrr_tries[3]; |
| int i, ret; |
| u16 hw_rate; |
| u16 cts_rate = 0; |
| u16 duration = 0; |
| u8 rc_flags; |
| |
| flags = AR5K_TXDESC_INTREQ | AR5K_TXDESC_CLRDMASK; |
| |
| /* XXX endianness */ |
| bf->skbaddr = pci_map_single(sc->pdev, skb->data, skb->len, |
| PCI_DMA_TODEVICE); |
| |
| rate = ieee80211_get_tx_rate(sc->hw, info); |
| |
| if (info->flags & IEEE80211_TX_CTL_NO_ACK) |
| flags |= AR5K_TXDESC_NOACK; |
| |
| rc_flags = info->control.rates[0].flags; |
| hw_rate = (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) ? |
| rate->hw_value_short : rate->hw_value; |
| |
| pktlen = skb->len; |
| |
| /* FIXME: If we are in g mode and rate is a CCK rate |
| * subtract ah->ah_txpower.txp_cck_ofdm_pwr_delta |
| * from tx power (value is in dB units already) */ |
| if (info->control.hw_key) { |
| keyidx = info->control.hw_key->hw_key_idx; |
| pktlen += info->control.hw_key->icv_len; |
| } |
| if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) { |
| flags |= AR5K_TXDESC_RTSENA; |
| cts_rate = ieee80211_get_rts_cts_rate(sc->hw, info)->hw_value; |
| duration = le16_to_cpu(ieee80211_rts_duration(sc->hw, |
| sc->vif, pktlen, info)); |
| } |
| if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { |
| flags |= AR5K_TXDESC_CTSENA; |
| cts_rate = ieee80211_get_rts_cts_rate(sc->hw, info)->hw_value; |
| duration = le16_to_cpu(ieee80211_ctstoself_duration(sc->hw, |
| sc->vif, pktlen, info)); |
| } |
| ret = ah->ah_setup_tx_desc(ah, ds, pktlen, |
| ieee80211_get_hdrlen_from_skb(skb), AR5K_PKT_TYPE_NORMAL, |
| (sc->power_level * 2), |
| hw_rate, |
| info->control.rates[0].count, keyidx, ah->ah_tx_ant, flags, |
| cts_rate, duration); |
| if (ret) |
| goto err_unmap; |
| |
| memset(mrr_rate, 0, sizeof(mrr_rate)); |
| memset(mrr_tries, 0, sizeof(mrr_tries)); |
| for (i = 0; i < 3; i++) { |
| rate = ieee80211_get_alt_retry_rate(sc->hw, info, i); |
| if (!rate) |
| break; |
| |
| mrr_rate[i] = rate->hw_value; |
| mrr_tries[i] = info->control.rates[i + 1].count; |
| } |
| |
| ah->ah_setup_mrr_tx_desc(ah, ds, |
| mrr_rate[0], mrr_tries[0], |
| mrr_rate[1], mrr_tries[1], |
| mrr_rate[2], mrr_tries[2]); |
| |
| ds->ds_link = 0; |
| ds->ds_data = bf->skbaddr; |
| |
| spin_lock_bh(&txq->lock); |
| list_add_tail(&bf->list, &txq->q); |
| sc->tx_stats[txq->qnum].len++; |
| if (txq->link == NULL) /* is this first packet? */ |
| ath5k_hw_set_txdp(ah, txq->qnum, bf->daddr); |
| else /* no, so only link it */ |
| *txq->link = bf->daddr; |
| |
| txq->link = &ds->ds_link; |
| ath5k_hw_start_tx_dma(ah, txq->qnum); |
| mmiowb(); |
| spin_unlock_bh(&txq->lock); |
| |
| 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_rxbuf_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 == NL80211_IFTYPE_AP || |
| sc->opmode == NL80211_IFTYPE_MESH_POINT) { |
| /* |
| * Always burst out beacon and CAB traffic |
| * (aifs = cwmin = cwmax = 0) |
| */ |
| qi.tqi_aifs = 0; |
| qi.tqi_cw_min = 0; |
| qi.tqi_cw_max = 0; |
| } else if (sc->opmode == NL80211_IFTYPE_ADHOC) { |
| /* |
| * Adhoc mode; backoff between 0 and (2 * cw_min). |
| */ |
| qi.tqi_aifs = 0; |
| qi.tqi_cw_min = 0; |
| qi.tqi_cw_max = 2 * ah->ah_cw_min; |
| } |
| |
| ATH5K_DBG(sc, ATH5K_DEBUG_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_set_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); |
| |
| ath5k_txbuf_free(sc, bf); |
| |
| spin_lock_bh(&sc->txbuflock); |
| sc->tx_stats[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_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); |
| } |
| } |
| ieee80211_wake_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); |
| |
| spin_lock_bh(&sc->rxbuflock); |
| sc->rxlink = NULL; |
| list_for_each_entry(bf, &sc->rxbuf, list) { |
| ret = ath5k_rxbuf_setup(sc, bf); |
| if (ret != 0) { |
| spin_unlock_bh(&sc->rxbuflock); |
| goto err; |
| } |
| } |
| bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list); |
| ath5k_hw_set_rxdp(ah, bf->daddr); |
| spin_unlock_bh(&sc->rxbuflock); |
| |
| ath5k_hw_start_rx_dma(ah); /* enable recv descriptors */ |
| ath5k_mode_setup(sc); /* set filters, etc. */ |
| ath5k_hw_start_rx_pcu(ah); /* re-enable PCU/DMA engine */ |
| |
| return 0; |
| err: |
| 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_rx_pcu(ah); /* disable PCU */ |
| ath5k_hw_set_rx_filter(ah, 0); /* clear recv filter */ |
| ath5k_hw_stop_rx_dma(ah); /* disable DMA engine */ |
| |
| ath5k_debug_printrxbuffs(sc, ah); |
| |
| 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 ath5k_rx_status *rs) |
| { |
| struct ieee80211_hdr *hdr = (void *)skb->data; |
| unsigned int keyix, hlen; |
| |
| if (!(rs->rs_status & AR5K_RXERR_DECRYPT) && |
| rs->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. */ |
| hlen = ieee80211_hdrlen(hdr->frame_control); |
| if (ieee80211_has_protected(hdr->frame_control) && |
| !(rs->rs_status & AR5K_RXERR_DECRYPT) && |
| skb->len >= hlen + 4) { |
| keyix = skb->data[hlen + 3] >> 6; |
| |
| if (test_bit(keyix, sc->keymap)) |
| return RX_FLAG_DECRYPTED; |
| } |
| |
| return 0; |
| } |
| |
| |
| static void |
| ath5k_check_ibss_tsf(struct ath5k_softc *sc, struct sk_buff *skb, |
| struct ieee80211_rx_status *rxs) |
| { |
| u64 tsf, bc_tstamp; |
| u32 hw_tu; |
| struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; |
| |
| if (ieee80211_is_beacon(mgmt->frame_control) && |
| le16_to_cpu(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 *must* |
| * have updated the local TSF. We have to work around various |
| * hardware bugs, though... |
| */ |
| tsf = ath5k_hw_get_tsf64(sc->ah); |
| bc_tstamp = le64_to_cpu(mgmt->u.beacon.timestamp); |
| hw_tu = TSF_TO_TU(tsf); |
| |
| ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, |
| "beacon %llx mactime %llx (diff %lld) tsf now %llx\n", |
| (unsigned long long)bc_tstamp, |
| (unsigned long long)rxs->mactime, |
| (unsigned long long)(rxs->mactime - bc_tstamp), |
| (unsigned long long)tsf); |
| |
| /* |
| * Sometimes the HW will give us a wrong tstamp in the rx |
| * status, causing the timestamp extension to go wrong. |
| * (This seems to happen especially with beacon frames bigger |
| * than 78 byte (incl. FCS)) |
| * But we know that the receive timestamp must be later than the |
| * timestamp of the beacon since HW must have synced to that. |
| * |
| * NOTE: here we assume mactime to be after the frame was |
| * received, not like mac80211 which defines it at the start. |
| */ |
| if (bc_tstamp > rxs->mactime) { |
| ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, |
| "fixing mactime from %llx to %llx\n", |
| (unsigned long long)rxs->mactime, |
| (unsigned long long)tsf); |
| rxs->mactime = tsf; |
| } |
| |
| /* |
| * Local TSF might have moved higher than our beacon timers, |
| * in that case we have to update them to continue sending |
| * beacons. This also takes care of synchronizing beacon sending |
| * times with other stations. |
| */ |
| if (hw_tu >= sc->nexttbtt) |
| ath5k_beacon_update_timers(sc, bc_tstamp); |
| } |
| } |
| |
| static void |
| ath5k_tasklet_rx(unsigned long data) |
| { |
| struct ieee80211_rx_status rxs = {}; |
| struct ath5k_rx_status rs = {}; |
| struct sk_buff *skb, *next_skb; |
| dma_addr_t next_skb_addr; |
| struct ath5k_softc *sc = (void *)data; |
| struct ath5k_buf *bf; |
| struct ath5k_desc *ds; |
| int ret; |
| int hdrlen; |
| int padsize; |
| |
| spin_lock(&sc->rxbuflock); |
| if (list_empty(&sc->rxbuf)) { |
| ATH5K_WARN(sc, "empty rx buf pool\n"); |
| goto unlock; |
| } |
| do { |
| rxs.flag = 0; |
| |
| bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list); |
| BUG_ON(bf->skb == NULL); |
| skb = bf->skb; |
| ds = bf->desc; |
| |
| /* bail if HW is still using self-linked descriptor */ |
| if (ath5k_hw_get_rxdp(sc->ah) == bf->daddr) |
| break; |
| |
| ret = sc->ah->ah_proc_rx_desc(sc->ah, ds, &rs); |
| if (unlikely(ret == -EINPROGRESS)) |
| break; |
| else if (unlikely(ret)) { |
| ATH5K_ERR(sc, "error in processing rx descriptor\n"); |
| spin_unlock(&sc->rxbuflock); |
| return; |
| } |
| |
| if (unlikely(rs.rs_more)) { |
| ATH5K_WARN(sc, "unsupported jumbo\n"); |
| goto next; |
| } |
| |
| if (unlikely(rs.rs_status)) { |
| if (rs.rs_status & AR5K_RXERR_PHY) |
| goto next; |
| if (rs.rs_status & AR5K_RXERR_DECRYPT) { |
| /* |
| * Decrypt error. If the error occurred |
| * because there was no hardware key, then |
| * let the frame through so the upper layers |
| * can process it. This is necessary for 5210 |
| * parts which have no way to setup a ``clear'' |
| * key cache entry. |
| * |
| * XXX do key cache faulting |
| */ |
| if (rs.rs_keyix == AR5K_RXKEYIX_INVALID && |
| !(rs.rs_status & AR5K_RXERR_CRC)) |
| goto accept; |
| } |
| if (rs.rs_status & AR5K_RXERR_MIC) { |
| rxs.flag |= RX_FLAG_MMIC_ERROR; |
| goto accept; |
| } |
| |
| /* let crypto-error packets fall through in MNTR */ |
| if ((rs.rs_status & |
| ~(AR5K_RXERR_DECRYPT|AR5K_RXERR_MIC)) || |
| sc->opmode != NL80211_IFTYPE_MONITOR) |
| goto next; |
| } |
| accept: |
| next_skb = ath5k_rx_skb_alloc(sc, &next_skb_addr); |
| |
| /* |
| * If we can't replace bf->skb with a new skb under memory |
| * pressure, just skip this packet |
| */ |
| if (!next_skb) |
| goto next; |
| |
| pci_unmap_single(sc->pdev, bf->skbaddr, sc->rxbufsize, |
| PCI_DMA_FROMDEVICE); |
| skb_put(skb, rs.rs_datalen); |
| |
| /* 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. */ |
| hdrlen = ieee80211_get_hdrlen_from_skb(skb); |
| padsize = ath5k_pad_size(hdrlen); |
| if (padsize) { |
| memmove(skb->data + padsize, skb->data, hdrlen); |
| skb_pull(skb, padsize); |
| } |
| |
| /* |
| * always extend the mac timestamp, since this information is |
| * also needed for proper IBSS merging. |
| * |
| * XXX: it might be too late to do it here, since rs_tstamp is |
| * 15bit only. that means TSF extension has to be done within |
| * 32768usec (about 32ms). it might be necessary to move this to |
| * the interrupt handler, like it is done in madwifi. |
| * |
| * Unfortunately we don't know when the hardware takes the rx |
| * timestamp (beginning of phy frame, data frame, end of rx?). |
| * The only thing we know is that it is hardware specific... |
| * On AR5213 it seems the rx timestamp is at the end of the |
| * frame, but i'm not sure. |
| * |
| * NOTE: mac80211 defines mactime at the beginning of the first |
| * data symbol. Since we don't have any time references it's |
| * impossible to comply to that. This affects IBSS merge only |
| * right now, so it's not too bad... |
| */ |
| rxs.mactime = ath5k_extend_tsf(sc->ah, rs.rs_tstamp); |
| rxs.flag |= RX_FLAG_TSFT; |
| |
| rxs.freq = sc->curchan->center_freq; |
| rxs.band = sc->curband->band; |
| |
| rxs.noise = sc->ah->ah_noise_floor; |
| rxs.signal = rxs.noise + rs.rs_rssi; |
| |
| /* An rssi of 35 indicates you should be able use |
| * 54 Mbps reliably. A more elaborate scheme can be used |
| * here but it requires a map of SNR/throughput for each |
| * possible mode used */ |
| rxs.qual = rs.rs_rssi * 100 / 35; |
| |
| /* rssi can be more than 35 though, anything above that |
| * should be considered at 100% */ |
| if (rxs.qual > 100) |
| rxs.qual = 100; |
| |
| rxs.antenna = rs.rs_antenna; |
| rxs.rate_idx = ath5k_hw_to_driver_rix(sc, rs.rs_rate); |
| rxs.flag |= ath5k_rx_decrypted(sc, ds, skb, &rs); |
| |
| if (rxs.rate_idx >= 0 && rs.rs_rate == |
| sc->curband->bitrates[rxs.rate_idx].hw_value_short) |
| rxs.flag |= RX_FLAG_SHORTPRE; |
| |
| ath5k_debug_dump_skb(sc, skb, "RX ", 0); |
| |
| /* check beacons in IBSS mode */ |
| if (sc->opmode == NL80211_IFTYPE_ADHOC) |
| ath5k_check_ibss_tsf(sc, skb, &rxs); |
| |
| __ieee80211_rx(sc->hw, skb, &rxs); |
| |
| bf->skb = next_skb; |
| bf->skbaddr = next_skb_addr; |
| next: |
| list_move_tail(&bf->list, &sc->rxbuf); |
| } while (ath5k_rxbuf_setup(sc, bf) == 0); |
| unlock: |
| spin_unlock(&sc->rxbuflock); |
| } |
| |
| |
| |
| |
| /*************\ |
| * TX Handling * |
| \*************/ |
| |
| static void |
| ath5k_tx_processq(struct ath5k_softc *sc, struct ath5k_txq *txq) |
| { |
| struct ath5k_tx_status ts = {}; |
| struct ath5k_buf *bf, *bf0; |
| struct ath5k_desc *ds; |
| struct sk_buff *skb; |
| struct ieee80211_tx_info *info; |
| int i, ret; |
| |
| spin_lock(&txq->lock); |
| list_for_each_entry_safe(bf, bf0, &txq->q, list) { |
| ds = bf->desc; |
| |
| 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; |
| } |
| |
| skb = bf->skb; |
| info = IEEE80211_SKB_CB(skb); |
| bf->skb = NULL; |
| |
| pci_unmap_single(sc->pdev, bf->skbaddr, skb->len, |
| PCI_DMA_TODEVICE); |
| |
| 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->ll_stats.dot11ACKFailureCount++; |
| if (ts.ts_status & AR5K_TXERR_FILT) |
| info->flags |= IEEE80211_TX_STAT_TX_FILTERED; |
| } else { |
| info->flags |= IEEE80211_TX_STAT_ACK; |
| info->status.ack_signal = ts.ts_rssi; |
| } |
| |
| ieee80211_tx_status(sc->hw, skb); |
| sc->tx_stats[txq->qnum].count++; |
| |
| spin_lock(&sc->txbuflock); |
| sc->tx_stats[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); |
| } |
| |
| |
| /*****************\ |
| * Beacon handling * |
| \*****************/ |
| |
| /* |
| * Setup the beacon frame for transmit. |
| */ |
| static int |
| ath5k_beacon_setup(struct ath5k_softc *sc, struct ath5k_buf *bf) |
| { |
| struct sk_buff *skb = bf->skb; |
| struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| struct ath5k_hw *ah = sc->ah; |
| struct ath5k_desc *ds; |
| int ret = 0; |
| u8 antenna; |
| 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(sc->pdev, bf->skbaddr)) { |
| ATH5K_ERR(sc, "beacon DMA mapping failed\n"); |
| return -EIO; |
| } |
| |
| ds = bf->desc; |
| antenna = ah->ah_tx_ant; |
| |
| flags = AR5K_TXDESC_NOACK; |
| if (sc->opmode == NL80211_IFTYPE_ADHOC && ath5k_hw_hasveol(ah)) { |
| ds->ds_link = bf->daddr; /* self-linked */ |
| flags |= AR5K_TXDESC_VEOL; |
| } else |
| ds->ds_link = 0; |
| |
| /* |
| * If we use multiple antennas on AP and use |
| * the Sectored AP scenario, switch antenna every |
| * 4 beacons to make sure everybody hears our AP. |
| * When a client tries to associate, hw will keep |
| * track of the tx antenna to be used for this client |
| * automaticaly, based on ACKed packets. |
| * |
| * Note: AP still listens and transmits RTS on the |
| * 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. |
| */ |
| 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), |
| 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: |
| pci_unmap_single(sc->pdev, bf->skbaddr, skb->len, PCI_DMA_TODEVICE); |
| return ret; |
| } |
| |
| static void ath5k_beacon_disable(struct ath5k_softc *sc) |
| { |
| sc->imask &= ~(AR5K_INT_BMISS | AR5K_INT_SWBA); |
| ath5k_hw_set_imr(sc->ah, sc->imask); |
| ath5k_hw_stop_tx_dma(sc->ah, sc->bhalq); |
| } |
| |
| /* |
| * 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 or restq |
| * tasklets) or user context from ath5k_beacon_config. |
| */ |
| static void |
| ath5k_beacon_send(struct ath5k_softc *sc) |
| { |
| struct ath5k_buf *bf = sc->bbuf; |
| struct ath5k_hw *ah = sc->ah; |
| |
| ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, "in beacon_send\n"); |
| |
| 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); |
| tasklet_schedule(&sc->restq); |
| } |
| return; |
| } |
| if (unlikely(sc->bmisscount != 0)) { |
| ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, |
| "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 start/stop ?\n", sc->bhalq); |
| /* NB: hw still stops DMA, so proceed */ |
| } |
| |
| /* 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); |
| |
| 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 (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", |
| (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; |
| |
| ath5k_hw_set_imr(ah, 0); |
| sc->bmisscount = 0; |
| sc->imask &= ~(AR5K_INT_BMISS | AR5K_INT_SWBA); |
| |
| if (sc->opmode == NL80211_IFTYPE_ADHOC || |
| sc->opmode == NL80211_IFTYPE_MESH_POINT || |
| sc->opmode == NL80211_IFTYPE_AP) { |
| /* |
| * 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)) { |
| spin_lock_irqsave(&sc->block, flags); |
| ath5k_beacon_send(sc); |
| spin_unlock_irqrestore(&sc->block, flags); |
| } |
| } else |
| ath5k_beacon_update_timers(sc, -1); |
| } |
| |
| ath5k_hw_set_imr(ah, sc->imask); |
| } |
| |
| 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 int |
| ath5k_init(struct ath5k_softc *sc) |
| { |
| struct ath5k_hw *ah = sc->ah; |
| int ret, i; |
| |
| mutex_lock(&sc->lock); |
| |
| ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "mode %d\n", sc->opmode); |
| |
| /* |
| * Stop anything previously setup. This is safe |
| * no matter this is the first time through or not. |
| */ |
| ath5k_stop_locked(sc); |
| |
| /* |
| * The basic interface to setting the hardware in a good |
| * state is ``reset''. On return the hardware is known to |
| * be powered up and with interrupts disabled. This must |
| * be followed by initialization of the appropriate bits |
| * and then setup of the interrupt mask. |
| */ |
| sc->curchan = sc->hw->conf.channel; |
| sc->curband = &sc->sbands[sc->curchan->band]; |
| sc->imask = AR5K_INT_RXOK | AR5K_INT_RXERR | AR5K_INT_RXEOL | |
| AR5K_INT_RXORN | AR5K_INT_TXDESC | AR5K_INT_TXEOL | |
| AR5K_INT_FATAL | AR5K_INT_GLOBAL; |
| ret = ath5k_reset(sc, NULL); |
| 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); |
| |
| /* Set ack to be sent at low bit-rates */ |
| ath5k_hw_set_ack_bitrate_high(ah, false); |
| |
| mod_timer(&sc->calib_tim, round_jiffies(jiffies + |
| msecs_to_jiffies(ath5k_calinterval * 1000))); |
| |
| 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); |
| } 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); |
| |
| mmiowb(); |
| mutex_unlock(&sc->lock); |
| |
| del_timer_sync(&sc->calib_tim); |
| tasklet_kill(&sc->rxtq); |
| tasklet_kill(&sc->txtq); |
| tasklet_kill(&sc->restq); |
| tasklet_kill(&sc->beacontq); |
| |
| 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 { |
| 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. |
| */ |
| tasklet_schedule(&sc->restq); |
| } else if (unlikely(status & AR5K_INT_RXORN)) { |
| tasklet_schedule(&sc->restq); |
| } 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->rxlink = NULL; |
| } |
| 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) { |
| /* |
| * These stats are also used for ANI i think |
| * so how about updating them more often ? |
| */ |
| ath5k_hw_update_mib_counters(ah, &sc->ll_stats); |
| } |
| } |
| } 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_wake(sc); |
| } |
| |
| /* |
| * 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", |
| ieee80211_frequency_to_channel(sc->curchan->center_freq), |
| sc->curchan->hw_value); |
| |
| 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"); |
| ath5k_reset_wake(sc); |
| } |
| 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)); |
| |
| mod_timer(&sc->calib_tim, round_jiffies(jiffies + |
| msecs_to_jiffies(ath5k_calinterval * 1000))); |
| } |
| |
| |
| /********************\ |
| * Mac80211 functions * |
| \********************/ |
| |
| static int |
| ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb) |
| { |
| struct ath5k_softc *sc = hw->priv; |
| struct ath5k_buf *bf; |
| unsigned long flags; |
| int hdrlen; |
| int padsize; |
| |
| 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"); |
| |
| /* |
| * 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); |
| padsize = ath5k_pad_size(hdrlen); |
| if (padsize) { |
| |
| if (skb_headroom(skb) < padsize) { |
| ATH5K_ERR(sc, "tx hdrlen not %%4: %d not enough" |
| " headroom to pad %d\n", hdrlen, padsize); |
| goto drop_packet; |
| } |
| skb_push(skb, padsize); |
| memmove(skb->data, skb->data+padsize, hdrlen); |
| } |
| |
| 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); |
| |
| bf->skb = skb; |
| |
| if (ath5k_txbuf_setup(sc, bf)) { |
| 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; |
| } |
| |
| /* |
| * Reset the hardware. If chan is not NULL, then also pause rx/tx |
| * and change to the given channel. |
| */ |
| static int |
| ath5k_reset(struct ath5k_softc *sc, struct ieee80211_channel *chan) |
| { |
| struct ath5k_hw *ah = sc->ah; |
| int ret; |
| |
| ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "resetting\n"); |
| |
| if (chan) { |
| ath5k_hw_set_imr(ah, 0); |
| ath5k_txq_cleanup(sc); |
| ath5k_rx_stop(sc); |
| |
| sc->curchan = chan; |
| sc->curband = &sc->sbands[chan->band]; |
| } |
| ret = ath5k_hw_reset(ah, sc->opmode, sc->curchan, true); |
| if (ret) { |
| ATH5K_ERR(sc, "can't reset hardware (%d)\n", ret); |
| goto err; |
| } |
| |
| ret = ath5k_rx_start(sc); |
| if (ret) { |
| ATH5K_ERR(sc, "can't start recv logic\n"); |
| goto err; |
| } |
| |
| /* |
| * 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); */ |
| |
| ath5k_beacon_config(sc); |
| /* intrs are enabled by ath5k_beacon_config */ |
| |
| return 0; |
| err: |
| return ret; |
| } |
| |
| static int |
| ath5k_reset_wake(struct ath5k_softc *sc) |
| { |
| int ret; |
| |
| ret = ath5k_reset(sc, sc->curchan); |
| if (!ret) |
| ieee80211_wake_queues(sc->hw); |
| |
| 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 NL80211_IFTYPE_AP: |
| case NL80211_IFTYPE_STATION: |
| case NL80211_IFTYPE_ADHOC: |
| case NL80211_IFTYPE_MESH_POINT: |
| case NL80211_IFTYPE_MONITOR: |
| sc->opmode = conf->type; |
| break; |
| default: |
| ret = -EOPNOTSUPP; |
| goto end; |
| } |
| |
| /* Set to a reasonable value. Note that this will |
| * be set to mac80211's value at ath5k_config(). */ |
| sc->bintval = 1000; |
| ath5k_hw_set_lladdr(sc->ah, conf->mac_addr); |
| |
| 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; |
| u8 mac[ETH_ALEN] = {}; |
| |
| mutex_lock(&sc->lock); |
| if (sc->vif != conf->vif) |
| goto end; |
| |
| ath5k_hw_set_lladdr(sc->ah, mac); |
| ath5k_beacon_disable(sc); |
| sc->vif = NULL; |
| end: |
| mutex_unlock(&sc->lock); |
| } |
| |
| /* |
| * TODO: Phy disable/diversity etc |
| */ |
| static int |
| ath5k_config(struct ieee80211_hw *hw, u32 changed) |
| { |
| struct ath5k_softc *sc = hw->priv; |
| struct ath5k_hw *ah = sc->ah; |
| struct ieee80211_conf *conf = &hw->conf; |
| int ret = 0; |
| |
| mutex_lock(&sc->lock); |
| |
| ret = ath5k_chan_set(sc, conf->channel); |
| if (ret < 0) |
| goto unlock; |
| |
| if ((changed & IEEE80211_CONF_CHANGE_POWER) && |
| (sc->power_level != conf->power_level)) { |
| sc->power_level = conf->power_level; |
| |
| /* Half dB steps */ |
| ath5k_hw_set_txpower_limit(ah, (conf->power_level * 2)); |
| } |
| |
| /* TODO: |
| * 1) Move this on config_interface and handle each case |
| * separately eg. when we have only one STA vif, use |
| * AR5K_ANTMODE_SINGLE_AP |
| * |
| * 2) Allow the user to change antenna mode eg. when only |
| * one antenna is present |
| * |
| * 3) Allow the user to set default/tx antenna when possible |
| * |
| * 4) Default mode should handle 90% of the cases, together |
| * with fixed a/b and single AP modes we should be able to |
| * handle 99%. Sectored modes are extreme cases and i still |
| * haven't found a usage for them. If we decide to support them, |
| * then we must allow the user to set how many tx antennas we |
| * have available |
| */ |
| ath5k_hw_set_antenna_mode(ah, AR5K_ANTMODE_DEFAULT); |
| |
| 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 = get_unaligned_le32(mclist->dmi_addr + 0); |
| pos = (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val; |
| val = get_unaligned_le32(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 == NL80211_IFTYPE_MONITOR) |
| rfilt |= AR5K_RX_FILTER_CONTROL | AR5K_RX_FILTER_BEACON | |
| AR5K_RX_FILTER_PROBEREQ | AR5K_RX_FILTER_PROM; |
| if (sc->opmode != NL80211_IFTYPE_STATION) |
| rfilt |= AR5K_RX_FILTER_PROBEREQ; |
| if (sc->opmode != NL80211_IFTYPE_AP && |
| sc->opmode != NL80211_IFTYPE_MESH_POINT && |
| test_bit(ATH_STAT_PROMISC, sc->status)) |
| rfilt |= AR5K_RX_FILTER_PROM; |
| if ((sc->opmode == NL80211_IFTYPE_STATION && sc->assoc) || |
| sc->opmode == NL80211_IFTYPE_ADHOC || |
| sc->opmode == NL80211_IFTYPE_AP) |
| rfilt |= AR5K_RX_FILTER_BEACON; |
| if (sc->opmode == NL80211_IFTYPE_MESH_POINT) |
| rfilt |= AR5K_RX_FILTER_CONTROL | AR5K_RX_FILTER_BEACON | |
| AR5K_RX_FILTER_PROBEREQ | AR5K_RX_FILTER_PROM; |
| |
| /* 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, |
| struct ieee80211_vif *vif, struct ieee80211_sta *sta, |
| struct ieee80211_key_conf *key) |
| { |
| struct ath5k_softc *sc = hw->priv; |
| int ret = 0; |
| |
| if (modparam_nohwcrypt) |
| return -EOPNOTSUPP; |
| |
| switch (key->alg) { |
| case ALG_WEP: |
| case ALG_TKIP: |
| break; |
| 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, |
| sta ? sta->addr : NULL); |
| 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; |
| 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, sc->keymap); |
| break; |
| default: |
| ret = -EINVAL; |
| goto unlock; |
| } |
| |
| unlock: |
| mmiowb(); |
| mutex_unlock(&sc->lock); |
| return ret; |
| } |
| |
| static int |
| ath5k_get_stats(struct ieee80211_hw *hw, |
| struct ieee80211_low_level_stats *stats) |
| { |
| struct ath5k_softc *sc = hw->priv; |
| struct ath5k_hw *ah = sc->ah; |
| |
| /* Force update */ |
| ath5k_hw_update_mib_counters(ah, &sc->ll_stats); |
| |
| 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_set_tsf(struct ieee80211_hw *hw, u64 tsf) |
| { |
| struct ath5k_softc *sc = hw->priv; |
| |
| ath5k_hw_set_tsf64(sc->ah, tsf); |
| } |
| |
| static void |
| ath5k_reset_tsf(struct ieee80211_hw *hw) |
| { |
| struct ath5k_softc *sc = hw->priv; |
| |
| /* |
| * in IBSS mode we need to update the beacon timers too. |
| * this will also reset the TSF if we call it with 0 |
| */ |
| if (sc->opmode == NL80211_IFTYPE_ADHOC) |
| ath5k_beacon_update_timers(sc, 0); |
| else |
| ath5k_hw_reset_tsf(sc->ah); |
| } |
| |
| /* |
| * 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(sc, sc->bbuf); |
| sc->bbuf->skb = skb; |
| ret = ath5k_beacon_setup(sc, sc->bbuf); |
| if (ret) |
| sc->bbuf->skb = NULL; |
| out: |
| return ret; |
| } |
| |
| /* |
| * Update the beacon and reconfigure the beacon queues. |
| */ |
| static void |
| ath5k_beacon_reconfig(struct ieee80211_hw *hw, struct ieee80211_vif *vif) |
| { |
| int ret; |
| unsigned long flags; |
| struct ath5k_softc *sc = hw->priv; |
| |
| spin_lock_irqsave(&sc->block, flags); |
| ret = ath5k_beacon_update(hw, vif); |
| spin_unlock_irqrestore(&sc->block, flags); |
| if (ret == 0) { |
| ath5k_beacon_config(sc); |
| mmiowb(); |
| } |
| } |
| |
| static void |
| set_beacon_filter(struct ieee80211_hw *hw, bool enable) |
| { |
| struct ath5k_softc *sc = hw->priv; |
| struct ath5k_hw *ah = sc->ah; |
| u32 rfilt; |
| rfilt = ath5k_hw_get_rx_filter(ah); |
| if (enable) |
| rfilt |= AR5K_RX_FILTER_BEACON; |
| else |
| rfilt &= ~AR5K_RX_FILTER_BEACON; |
| ath5k_hw_set_rx_filter(ah, rfilt); |
| sc->filter_flags = rfilt; |
| } |
| |
| static void ath5k_bss_info_changed(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| struct ieee80211_bss_conf *bss_conf, |
| u32 changes) |
| { |
| struct ath5k_softc *sc = hw->priv; |
| struct ath5k_hw *ah = sc->ah; |
| |
| mutex_lock(&sc->lock); |
| if (WARN_ON(sc->vif != vif)) |
| goto unlock; |
| |
| if (changes & BSS_CHANGED_BSSID) { |
| /* Cache for later use during resets */ |
| memcpy(ah->ah_bssid, bss_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); |
| mmiowb(); |
| } |
| |
| if (changes & BSS_CHANGED_BEACON_INT) |
| sc->bintval = bss_conf->beacon_int; |
| |
| if (changes & BSS_CHANGED_ASSOC) { |
| sc->assoc = bss_conf->assoc; |
| if (sc->opmode == NL80211_IFTYPE_STATION) |
| set_beacon_filter(hw, sc->assoc); |
| } |
| |
| if (changes & BSS_CHANGED_BEACON && |
| (vif->type == NL80211_IFTYPE_ADHOC || |
| vif->type == NL80211_IFTYPE_MESH_POINT || |
| vif->type == NL80211_IFTYPE_AP)) { |
| ath5k_beacon_reconfig(hw, vif); |
| } |
| |
| unlock: |
| mutex_unlock(&sc->lock); |
| } |