2 Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
3 <http://rt2x00.serialmonkey.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the
17 Free Software Foundation, Inc.,
18 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 Abstract: rt2x00 global information.
29 #include <linux/bitops.h>
30 #include <linux/skbuff.h>
31 #include <linux/workqueue.h>
32 #include <linux/firmware.h>
33 #include <linux/leds.h>
34 #include <linux/mutex.h>
35 #include <linux/etherdevice.h>
37 #include <net/mac80211.h>
39 #include "rt2x00debug.h"
40 #include "rt2x00leds.h"
41 #include "rt2x00reg.h"
42 #include "rt2x00queue.h"
47 #define DRV_VERSION "2.1.6"
48 #define DRV_PROJECT "http://rt2x00.serialmonkey.com"
52 * Debug output has to be enabled during compile time.
54 #define DEBUG_PRINTK_MSG(__dev, __kernlvl, __lvl, __msg, __args...) \
55 printk(__kernlvl "%s -> %s: %s - " __msg, \
56 wiphy_name((__dev)->hw->wiphy), __FUNCTION__, __lvl, ##__args)
58 #define DEBUG_PRINTK_PROBE(__kernlvl, __lvl, __msg, __args...) \
59 printk(__kernlvl "%s -> %s: %s - " __msg, \
60 KBUILD_MODNAME, __FUNCTION__, __lvl, ##__args)
62 #ifdef CONFIG_RT2X00_DEBUG
63 #define DEBUG_PRINTK(__dev, __kernlvl, __lvl, __msg, __args...) \
64 DEBUG_PRINTK_MSG(__dev, __kernlvl, __lvl, __msg, ##__args);
66 #define DEBUG_PRINTK(__dev, __kernlvl, __lvl, __msg, __args...) \
68 #endif /* CONFIG_RT2X00_DEBUG */
71 * Various debug levels.
72 * The debug levels PANIC and ERROR both indicate serious problems,
73 * for this reason they should never be ignored.
74 * The special ERROR_PROBE message is for messages that are generated
75 * when the rt2x00_dev is not yet initialized.
77 #define PANIC(__dev, __msg, __args...) \
78 DEBUG_PRINTK_MSG(__dev, KERN_CRIT, "Panic", __msg, ##__args)
79 #define ERROR(__dev, __msg, __args...) \
80 DEBUG_PRINTK_MSG(__dev, KERN_ERR, "Error", __msg, ##__args)
81 #define ERROR_PROBE(__msg, __args...) \
82 DEBUG_PRINTK_PROBE(KERN_ERR, "Error", __msg, ##__args)
83 #define WARNING(__dev, __msg, __args...) \
84 DEBUG_PRINTK(__dev, KERN_WARNING, "Warning", __msg, ##__args)
85 #define NOTICE(__dev, __msg, __args...) \
86 DEBUG_PRINTK(__dev, KERN_NOTICE, "Notice", __msg, ##__args)
87 #define INFO(__dev, __msg, __args...) \
88 DEBUG_PRINTK(__dev, KERN_INFO, "Info", __msg, ##__args)
89 #define DEBUG(__dev, __msg, __args...) \
90 DEBUG_PRINTK(__dev, KERN_DEBUG, "Debug", __msg, ##__args)
91 #define EEPROM(__dev, __msg, __args...) \
92 DEBUG_PRINTK(__dev, KERN_DEBUG, "EEPROM recovery", __msg, ##__args)
95 * Standard timing and size defines.
96 * These values should follow the ieee80211 specifications.
99 #define IEEE80211_HEADER 24
103 #define SHORT_PREAMBLE 72
105 #define SHORT_SLOT_TIME 9
107 #define PIFS ( SIFS + SLOT_TIME )
108 #define SHORT_PIFS ( SIFS + SHORT_SLOT_TIME )
109 #define DIFS ( PIFS + SLOT_TIME )
110 #define SHORT_DIFS ( SHORT_PIFS + SHORT_SLOT_TIME )
111 #define EIFS ( SIFS + (8 * (IEEE80211_HEADER + ACK_SIZE)) )
114 * IEEE802.11 header defines
116 static inline int is_rts_frame(u16 fc)
118 return (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) &&
119 ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_RTS));
122 static inline int is_cts_frame(u16 fc)
124 return (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) &&
125 ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_CTS));
128 static inline int is_probe_resp(u16 fc)
130 return (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) &&
131 ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP));
134 static inline int is_beacon(u16 fc)
136 return (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) &&
137 ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON));
141 * Chipset identification
142 * The chipset on the device is composed of a RT and RF chip.
143 * The chipset combination is important for determining device capabilities.
147 #define RT2460 0x0101
148 #define RT2560 0x0201
149 #define RT2570 0x1201
150 #define RT2561s 0x0301 /* Turbo */
151 #define RT2561 0x0302
152 #define RT2661 0x0401
153 #define RT2571 0x1300
160 * RF register values that belong to a particular channel.
171 * Antenna setup values.
173 struct antenna_setup {
179 * Quality statistics about the currently active link.
183 * Statistics required for Link tuning.
184 * For the average RSSI value we use the "Walking average" approach.
185 * When adding RSSI to the average value the following calculation
188 * avg_rssi = ((avg_rssi * 7) + rssi) / 8;
190 * The advantage of this approach is that we only need 1 variable
191 * to store the average in (No need for a count and a total).
192 * But more importantly, normal average values will over time
193 * move less and less towards newly added values this results
194 * that with link tuning, the device can have a very good RSSI
195 * for a few minutes but when the device is moved away from the AP
196 * the average will not decrease fast enough to compensate.
197 * The walking average compensates this and will move towards
198 * the new values correctly allowing a effective link tuning.
204 * Statistics required for Signal quality calculation.
205 * For calculating the Signal quality we have to determine
206 * the total number of success and failed RX and TX frames.
207 * After that we also use the average RSSI value to help
208 * determining the signal quality.
209 * For the calculation we will use the following algorithm:
211 * rssi_percentage = (avg_rssi * 100) / rssi_offset
212 * rx_percentage = (rx_success * 100) / rx_total
213 * tx_percentage = (tx_success * 100) / tx_total
214 * avg_signal = ((WEIGHT_RSSI * avg_rssi) +
215 * (WEIGHT_TX * tx_percentage) +
216 * (WEIGHT_RX * rx_percentage)) / 100
218 * This value should then be checked to not be greated then 100.
226 #define WEIGHT_RSSI 20
232 * Antenna settings about the currently active link.
239 #define ANTENNA_RX_DIVERSITY 0x00000001
240 #define ANTENNA_TX_DIVERSITY 0x00000002
241 #define ANTENNA_MODE_SAMPLE 0x00000004
244 * Currently active TX/RX antenna setup.
245 * When software diversity is used, this will indicate
246 * which antenna is actually used at this time.
248 struct antenna_setup active;
251 * RSSI information for the different antenna's.
252 * These statistics are used to determine when
253 * to switch antenna when using software diversity.
255 * rssi[0] -> Antenna A RSSI
256 * rssi[1] -> Antenna B RSSI
261 * Current RSSI average of the currently active antenna.
262 * Similar to the avg_rssi in the link_qual structure
263 * this value is updated by using the walking average.
269 * To optimize the quality of the link we need to store
270 * the quality of received frames and periodically
276 * The number of times the link has been tuned
277 * since the radio has been switched on.
282 * Quality measurement values.
284 struct link_qual qual;
287 * TX/RX antenna setup.
297 * Work structure for scheduling periodic link tuning.
299 struct delayed_work work;
303 * Small helper macro to work with moving/walking averages.
305 #define MOVING_AVERAGE(__avg, __val, __samples) \
306 ( (((__avg) * ((__samples) - 1)) + (__val)) / (__samples) )
309 * When we lack RSSI information return something less then -80 to
310 * tell the driver to tune the device to maximum sensitivity.
312 #define DEFAULT_RSSI ( -128 )
315 * Link quality access functions.
317 static inline int rt2x00_get_link_rssi(struct link *link)
319 if (link->qual.avg_rssi && link->qual.rx_success)
320 return link->qual.avg_rssi;
324 static inline int rt2x00_get_link_ant_rssi(struct link *link)
326 if (link->ant.rssi_ant && link->qual.rx_success)
327 return link->ant.rssi_ant;
331 static inline int rt2x00_get_link_ant_rssi_history(struct link *link,
334 if (link->ant.rssi_history[ant - ANTENNA_A])
335 return link->ant.rssi_history[ant - ANTENNA_A];
339 static inline int rt2x00_update_ant_rssi(struct link *link, int rssi)
341 int old_rssi = link->ant.rssi_history[link->ant.active.rx - ANTENNA_A];
342 link->ant.rssi_history[link->ant.active.rx - ANTENNA_A] = rssi;
347 * Interface structure
348 * Per interface configuration details, this structure
349 * is allocated as the private data for ieee80211_vif.
353 * All fields within the rt2x00_intf structure
354 * must be protected with a spinlock.
359 * BSS configuration. Copied from the structure
360 * passed to us through the bss_info_changed()
363 struct ieee80211_bss_conf conf;
371 * BBSID of the AP to associate with.
376 * Entry in the beacon queue which belongs to
377 * this interface. Each interface has its own
378 * dedicated beacon entry.
380 struct queue_entry *beacon;
383 * Actions that needed rescheduling.
385 unsigned int delayed_flags;
386 #define DELAYED_UPDATE_BEACON 0x00000001
387 #define DELAYED_CONFIG_ERP 0x00000002
388 #define DELAYED_LED_ASSOC 0x00000004
391 static inline struct rt2x00_intf* vif_to_intf(struct ieee80211_vif *vif)
393 return (struct rt2x00_intf *)vif->drv_priv;
397 * struct hw_mode_spec: Hardware specifications structure
399 * Details about the supported modes, rates and channels
400 * of a particular chipset. This is used by rt2x00lib
401 * to build the ieee80211_hw_mode array for mac80211.
403 * @supported_bands: Bitmask contained the supported bands (2.4GHz, 5.2GHz).
404 * @supported_rates: Rate types which are supported (CCK, OFDM).
405 * @num_channels: Number of supported channels. This is used as array size
406 * for @tx_power_a, @tx_power_bg and @channels.
407 * @channels: Device/chipset specific channel values (See &struct rf_channel).
408 * @tx_power_a: TX power values for all 5.2GHz channels (may be NULL).
409 * @tx_power_bg: TX power values for all 2.4GHz channels (may be NULL).
410 * @tx_power_default: Default TX power value to use when either
411 * @tx_power_a or @tx_power_bg is missing.
413 struct hw_mode_spec {
414 unsigned int supported_bands;
415 #define SUPPORT_BAND_2GHZ 0x00000001
416 #define SUPPORT_BAND_5GHZ 0x00000002
418 unsigned int supported_rates;
419 #define SUPPORT_RATE_CCK 0x00000001
420 #define SUPPORT_RATE_OFDM 0x00000002
422 unsigned int num_channels;
423 const struct rf_channel *channels;
425 const u8 *tx_power_a;
426 const u8 *tx_power_bg;
431 * Configuration structure wrapper around the
432 * mac80211 configuration structure.
433 * When mac80211 configures the driver, rt2x00lib
434 * can precalculate values which are equal for all
435 * rt2x00 drivers. Those values can be stored in here.
437 struct rt2x00lib_conf {
438 struct ieee80211_conf *conf;
439 struct rf_channel rf;
441 struct antenna_setup ant;
443 enum ieee80211_band band;
455 * Configuration structure for erp settings.
457 struct rt2x00lib_erp {
461 int ack_consume_time;
465 * Configuration structure wrapper around the
466 * rt2x00 interface configuration handler.
468 struct rt2x00intf_conf {
472 enum ieee80211_if_types type;
475 * TSF sync value, this is dependant on the operation type.
480 * The MAC and BSSID addressess are simple array of bytes,
481 * these arrays are little endian, so when sending the addressess
482 * to the drivers, copy the it into a endian-signed variable.
484 * Note that all devices (except rt2500usb) have 32 bits
485 * register word sizes. This means that whatever variable we
486 * pass _must_ be a multiple of 32 bits. Otherwise the device
487 * might not accept what we are sending to it.
488 * This will also make it easier for the driver to write
489 * the data to the device.
496 * rt2x00lib callback functions.
498 struct rt2x00lib_ops {
500 * Interrupt handlers.
502 irq_handler_t irq_handler;
505 * Device init handlers.
507 int (*probe_hw) (struct rt2x00_dev *rt2x00dev);
508 char *(*get_firmware_name) (struct rt2x00_dev *rt2x00dev);
509 u16 (*get_firmware_crc) (void *data, const size_t len);
510 int (*load_firmware) (struct rt2x00_dev *rt2x00dev, void *data,
514 * Device initialization/deinitialization handlers.
516 int (*initialize) (struct rt2x00_dev *rt2x00dev);
517 void (*uninitialize) (struct rt2x00_dev *rt2x00dev);
520 * queue initialization handlers
522 void (*init_rxentry) (struct rt2x00_dev *rt2x00dev,
523 struct queue_entry *entry);
524 void (*init_txentry) (struct rt2x00_dev *rt2x00dev,
525 struct queue_entry *entry);
528 * Radio control handlers.
530 int (*set_device_state) (struct rt2x00_dev *rt2x00dev,
531 enum dev_state state);
532 int (*rfkill_poll) (struct rt2x00_dev *rt2x00dev);
533 void (*link_stats) (struct rt2x00_dev *rt2x00dev,
534 struct link_qual *qual);
535 void (*reset_tuner) (struct rt2x00_dev *rt2x00dev);
536 void (*link_tuner) (struct rt2x00_dev *rt2x00dev);
539 * TX control handlers
541 void (*write_tx_desc) (struct rt2x00_dev *rt2x00dev,
543 struct txentry_desc *txdesc);
544 int (*write_tx_data) (struct rt2x00_dev *rt2x00dev,
545 struct data_queue *queue, struct sk_buff *skb,
546 struct ieee80211_tx_control *control);
547 int (*get_tx_data_len) (struct rt2x00_dev *rt2x00dev,
548 struct sk_buff *skb);
549 void (*kick_tx_queue) (struct rt2x00_dev *rt2x00dev,
550 const enum data_queue_qid queue);
553 * RX control handlers
555 void (*fill_rxdone) (struct queue_entry *entry,
556 struct rxdone_entry_desc *rxdesc);
559 * Configuration handlers.
561 void (*config_filter) (struct rt2x00_dev *rt2x00dev,
562 const unsigned int filter_flags);
563 void (*config_intf) (struct rt2x00_dev *rt2x00dev,
564 struct rt2x00_intf *intf,
565 struct rt2x00intf_conf *conf,
566 const unsigned int flags);
567 #define CONFIG_UPDATE_TYPE ( 1 << 1 )
568 #define CONFIG_UPDATE_MAC ( 1 << 2 )
569 #define CONFIG_UPDATE_BSSID ( 1 << 3 )
571 void (*config_erp) (struct rt2x00_dev *rt2x00dev,
572 struct rt2x00lib_erp *erp);
573 void (*config) (struct rt2x00_dev *rt2x00dev,
574 struct rt2x00lib_conf *libconf,
575 const unsigned int flags);
576 #define CONFIG_UPDATE_PHYMODE ( 1 << 1 )
577 #define CONFIG_UPDATE_CHANNEL ( 1 << 2 )
578 #define CONFIG_UPDATE_TXPOWER ( 1 << 3 )
579 #define CONFIG_UPDATE_ANTENNA ( 1 << 4 )
580 #define CONFIG_UPDATE_SLOT_TIME ( 1 << 5 )
581 #define CONFIG_UPDATE_BEACON_INT ( 1 << 6 )
582 #define CONFIG_UPDATE_ALL 0xffff
586 * rt2x00 driver callback operation structure.
590 const unsigned int max_sta_intf;
591 const unsigned int max_ap_intf;
592 const unsigned int eeprom_size;
593 const unsigned int rf_size;
594 const unsigned int tx_queues;
595 const struct data_queue_desc *rx;
596 const struct data_queue_desc *tx;
597 const struct data_queue_desc *bcn;
598 const struct data_queue_desc *atim;
599 const struct rt2x00lib_ops *lib;
600 const struct ieee80211_ops *hw;
601 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
602 const struct rt2x00debug *debugfs;
603 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
607 * rt2x00 device flags
614 DEVICE_REGISTERED_HW,
617 DEVICE_STARTED_SUSPEND,
618 DEVICE_ENABLED_RADIO,
619 DEVICE_DISABLED_RADIO_HW,
624 DRIVER_REQUIRE_FIRMWARE,
625 DRIVER_REQUIRE_BEACON_GUARD,
626 DRIVER_REQUIRE_ATIM_QUEUE,
627 DRIVER_REQUIRE_SCHEDULED,
630 * Driver configuration
632 CONFIG_SUPPORT_HW_BUTTON,
635 CONFIG_EXTERNAL_LNA_A,
636 CONFIG_EXTERNAL_LNA_BG,
637 CONFIG_DOUBLE_ANTENNA,
638 CONFIG_DISABLE_LINK_TUNING,
642 * rt2x00 device structure.
647 * The structure stored in here depends on the
648 * system bus (PCI or USB).
649 * When accessing this variable, the rt2x00dev_{pci,usb}
650 * macro's should be used for correct typecasting.
653 #define rt2x00dev_pci(__dev) ( (struct pci_dev *)(__dev)->dev )
654 #define rt2x00dev_usb(__dev) ( (struct usb_interface *)(__dev)->dev )
655 #define rt2x00dev_usb_dev(__dev)\
656 ( (struct usb_device *)interface_to_usbdev(rt2x00dev_usb(__dev)) )
659 * Callback functions.
661 const struct rt2x00_ops *ops;
664 * IEEE80211 control structure.
666 struct ieee80211_hw *hw;
667 struct ieee80211_supported_band bands[IEEE80211_NUM_BANDS];
668 enum ieee80211_band curr_band;
671 * rfkill structure for RF state switching support.
672 * This will only be compiled in when required.
674 #ifdef CONFIG_RT2X00_LIB_RFKILL
675 unsigned long rfkill_state;
676 #define RFKILL_STATE_ALLOCATED 1
677 #define RFKILL_STATE_REGISTERED 2
678 struct rfkill *rfkill;
679 struct input_polled_dev *poll_dev;
680 #endif /* CONFIG_RT2X00_LIB_RFKILL */
683 * If enabled, the debugfs interface structures
684 * required for deregistration of debugfs.
686 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
687 struct rt2x00debug_intf *debugfs_intf;
688 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
691 * LED structure for changing the LED status
692 * by mac8011 or the kernel.
694 #ifdef CONFIG_RT2X00_LIB_LEDS
695 struct rt2x00_led led_radio;
696 struct rt2x00_led led_assoc;
697 struct rt2x00_led led_qual;
699 #endif /* CONFIG_RT2X00_LIB_LEDS */
703 * In these flags the current status and some
704 * of the device capabilities are stored.
709 * Chipset identification.
711 struct rt2x00_chip chip;
714 * hw capability specifications.
716 struct hw_mode_spec spec;
719 * This is the default TX/RX antenna setup as indicated
720 * by the device's EEPROM. When mac80211 sets its
721 * antenna value to 0 we should be using these values.
723 struct antenna_setup default_ant;
727 * csr.base: CSR base register address. (PCI)
728 * csr.cache: CSR cache for usb_control_msg. (USB)
736 * Mutex to protect register accesses on USB devices.
737 * There are 2 reasons this is needed, one is to ensure
738 * use of the csr_cache (for USB devices) by one thread
739 * isn't corrupted by another thread trying to access it.
740 * The other is that access to BBP and RF registers
741 * require multiple BUS transactions and if another thread
742 * attempted to access one of those registers at the same
743 * time one of the writes could silently fail.
745 struct mutex usb_cache_mutex;
748 * Current packet filter configuration for the device.
749 * This contains all currently active FIF_* flags send
750 * to us by mac80211 during configure_filter().
752 unsigned int packet_filter;
756 * - Open ap interface count.
757 * - Open sta interface count.
758 * - Association count.
760 unsigned int intf_ap_count;
761 unsigned int intf_sta_count;
762 unsigned int intf_associated;
775 * Active RF register values.
776 * These are stored here so we don't need
777 * to read the rf registers and can directly
778 * use this value instead.
779 * This field should be accessed by using
780 * rt2x00_rf_read() and rt2x00_rf_write().
785 * USB Max frame size (for rt2500usb & rt73usb).
790 * Current TX power value.
795 * Rssi <-> Dbm offset
800 * Frequency offset (for rt61pci & rt73usb).
805 * Low level statistics which will have
806 * to be kept up to date while device is running.
808 struct ieee80211_low_level_stats low_level_stats;
811 * RX configuration information.
813 struct ieee80211_rx_status rx_status;
818 struct work_struct intf_work;
819 struct work_struct filter_work;
822 * Data queue arrays for RX, TX and Beacon.
823 * The Beacon array also contains the Atim queue
824 * if that is supported by the device.
827 struct data_queue *rx;
828 struct data_queue *tx;
829 struct data_queue *bcn;
834 const struct firmware *fw;
839 * The RF is being accessed by word index.
841 static inline void rt2x00_rf_read(struct rt2x00_dev *rt2x00dev,
842 const unsigned int word, u32 *data)
844 *data = rt2x00dev->rf[word];
847 static inline void rt2x00_rf_write(struct rt2x00_dev *rt2x00dev,
848 const unsigned int word, u32 data)
850 rt2x00dev->rf[word] = data;
854 * Generic EEPROM access.
855 * The EEPROM is being accessed by word index.
857 static inline void *rt2x00_eeprom_addr(struct rt2x00_dev *rt2x00dev,
858 const unsigned int word)
860 return (void *)&rt2x00dev->eeprom[word];
863 static inline void rt2x00_eeprom_read(struct rt2x00_dev *rt2x00dev,
864 const unsigned int word, u16 *data)
866 *data = le16_to_cpu(rt2x00dev->eeprom[word]);
869 static inline void rt2x00_eeprom_write(struct rt2x00_dev *rt2x00dev,
870 const unsigned int word, u16 data)
872 rt2x00dev->eeprom[word] = cpu_to_le16(data);
878 static inline void rt2x00_set_chip(struct rt2x00_dev *rt2x00dev,
879 const u16 rt, const u16 rf, const u32 rev)
882 "Chipset detected - rt: %04x, rf: %04x, rev: %08x.\n",
885 rt2x00dev->chip.rt = rt;
886 rt2x00dev->chip.rf = rf;
887 rt2x00dev->chip.rev = rev;
890 static inline char rt2x00_rt(const struct rt2x00_chip *chipset, const u16 chip)
892 return (chipset->rt == chip);
895 static inline char rt2x00_rf(const struct rt2x00_chip *chipset, const u16 chip)
897 return (chipset->rf == chip);
900 static inline u16 rt2x00_rev(const struct rt2x00_chip *chipset)
905 static inline u16 rt2x00_check_rev(const struct rt2x00_chip *chipset,
908 return (((chipset->rev & 0xffff0) == rev) &&
909 !!(chipset->rev & 0x0000f));
913 * Duration calculations
914 * The rate variable passed is: 100kbs.
915 * To convert from bytes to bits we multiply size with 8,
916 * then the size is multiplied with 10 to make the
917 * real rate -> rate argument correction.
919 static inline u16 get_duration(const unsigned int size, const u8 rate)
921 return ((size * 8 * 10) / rate);
924 static inline u16 get_duration_res(const unsigned int size, const u8 rate)
926 return ((size * 8 * 10) % rate);
930 * rt2x00queue_create_tx_descriptor - Create TX descriptor from mac80211 input
931 * @entry: The entry which will be used to transfer the TX frame.
932 * @txdesc: rt2x00 TX descriptor which will be initialized by this function.
933 * @control: mac80211 TX control structure from where we read the information.
935 * This function will initialize the &struct txentry_desc based on information
936 * from mac80211. This descriptor can then be used by rt2x00lib and the drivers
937 * to correctly initialize the hardware descriptor.
938 * Note that before calling this function the skb->cb array must be untouched
939 * by rt2x00lib. Only after this function completes will it be save to
940 * overwrite the skb->cb information.
941 * The reason for this is that mac80211 writes its own tx information into
942 * the skb->cb array, and this function will use that information to initialize
943 * the &struct txentry_desc structure.
945 void rt2x00queue_create_tx_descriptor(struct queue_entry *entry,
946 struct txentry_desc *txdesc,
947 struct ieee80211_tx_control *control);
950 * rt2x00queue_write_tx_descriptor - Write TX descriptor to hardware
951 * @entry: The entry which will be used to transfer the TX frame.
952 * @txdesc: TX descriptor which will be used to write hardware descriptor
954 * This function will write a TX descriptor initialized by
955 * &rt2x00queue_create_tx_descriptor to the hardware. After this call
956 * has completed the frame is now owned by the hardware, the hardware
957 * queue will have automatically be kicked unless this frame was generated
958 * by rt2x00lib, in which case the frame is "special" and must be kicked
961 void rt2x00queue_write_tx_descriptor(struct queue_entry *entry,
962 struct txentry_desc *txdesc);
965 * rt2x00queue_get_queue - Convert queue index to queue pointer
966 * @rt2x00dev: Pointer to &struct rt2x00_dev.
967 * @queue: rt2x00 queue index (see &enum data_queue_qid).
969 struct data_queue *rt2x00queue_get_queue(struct rt2x00_dev *rt2x00dev,
970 const enum data_queue_qid queue);
973 * rt2x00queue_get_entry - Get queue entry where the given index points to.
974 * @queue: Pointer to &struct data_queue from where we obtain the entry.
975 * @index: Index identifier for obtaining the correct index.
977 struct queue_entry *rt2x00queue_get_entry(struct data_queue *queue,
978 enum queue_index index);
981 * rt2x00queue_index_inc - Index incrementation function
982 * @queue: Queue (&struct data_queue) to perform the action on.
983 * @index: Index type (&enum queue_index) to perform the action on.
985 * This function will increase the requested index on the queue,
986 * it will grab the appropriate locks and handle queue overflow events by
987 * resetting the index to the start of the queue.
989 void rt2x00queue_index_inc(struct data_queue *queue, enum queue_index index);
993 * Interrupt context handlers.
995 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev);
996 void rt2x00lib_txdone(struct queue_entry *entry,
997 struct txdone_entry_desc *txdesc);
998 void rt2x00lib_rxdone(struct queue_entry *entry,
999 struct rxdone_entry_desc *rxdesc);
1002 * mac80211 handlers.
1004 int rt2x00mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
1005 struct ieee80211_tx_control *control);
1006 int rt2x00mac_start(struct ieee80211_hw *hw);
1007 void rt2x00mac_stop(struct ieee80211_hw *hw);
1008 int rt2x00mac_add_interface(struct ieee80211_hw *hw,
1009 struct ieee80211_if_init_conf *conf);
1010 void rt2x00mac_remove_interface(struct ieee80211_hw *hw,
1011 struct ieee80211_if_init_conf *conf);
1012 int rt2x00mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
1013 int rt2x00mac_config_interface(struct ieee80211_hw *hw,
1014 struct ieee80211_vif *vif,
1015 struct ieee80211_if_conf *conf);
1016 void rt2x00mac_configure_filter(struct ieee80211_hw *hw,
1017 unsigned int changed_flags,
1018 unsigned int *total_flags,
1019 int mc_count, struct dev_addr_list *mc_list);
1020 int rt2x00mac_get_stats(struct ieee80211_hw *hw,
1021 struct ieee80211_low_level_stats *stats);
1022 int rt2x00mac_get_tx_stats(struct ieee80211_hw *hw,
1023 struct ieee80211_tx_queue_stats *stats);
1024 void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw,
1025 struct ieee80211_vif *vif,
1026 struct ieee80211_bss_conf *bss_conf,
1028 int rt2x00mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1029 const struct ieee80211_tx_queue_params *params);
1032 * Driver allocation handlers.
1034 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev);
1035 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev);
1037 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state);
1038 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev);
1039 #endif /* CONFIG_PM */
1041 #endif /* RT2X00_H */