Author: adrian Date: Tue Jun 7 09:03:28 2011 New Revision: 222815 URL: http://svn.freebsd.org/changeset/base/222815
Log: Flesh out a new HAL method to fetch the radar PHY error frame information. For the AR5211/AR5212, this is apparently a one byte pulse duration counter value. It is only coded up here for the AR5212 as I don't have any AR5211-series hardware to test it on. This information was extracted from the Madwifi DFS branch along with some local additions. Please note - all this does is extract out the radar event duration, it in no way reflects the presence of a radar. Further code is needed to take a set of radar events and filter them to extract out correct radar pulse trains (and ignore other events.) For further information, please see: http://wiki.freebsd.org/dev/ath_hal%284%29/RadarDetection This includes references to the relevant patents which describe what is going on. Obtained from: Madwifi Modified: head/sys/dev/ath/ath_hal/ah.h head/sys/dev/ath/ath_hal/ar5212/ar5212.h head/sys/dev/ath/ath_hal/ar5212/ar5212_attach.c head/sys/dev/ath/ath_hal/ar5212/ar5212_misc.c head/sys/dev/ath/ath_hal/ar5416/ar5416.h head/sys/dev/ath/ath_hal/ar5416/ar5416_attach.c head/sys/dev/ath/ath_hal/ar5416/ar5416_misc.c head/sys/dev/ath/if_athvar.h Modified: head/sys/dev/ath/ath_hal/ah.h ============================================================================== --- head/sys/dev/ath/ath_hal/ah.h Tue Jun 7 09:02:25 2011 (r222814) +++ head/sys/dev/ath/ath_hal/ah.h Tue Jun 7 09:03:28 2011 (r222815) @@ -745,6 +745,17 @@ typedef enum { HAL_QUIET_ADD_SWBA_RESP_TIME = 0x4, /* add beacon response time to next_start offset */ } HAL_QUIET_FLAG; +#define HAL_DFS_EVENT_PRICH 0x0000001 + +struct dfs_event { + uint64_t re_full_ts; /* 64-bit full timestamp from interrupt time */ + uint32_t re_ts; /* Original 15 bit recv timestamp */ + uint8_t re_rssi; /* rssi of radar event */ + uint8_t re_dur; /* duration of radar pulse */ + uint32_t re_flags; /* Flags (see above) */ +}; +typedef struct dfs_event HAL_DFS_EVENT; + /* * Hardware Access Layer (HAL) API. * @@ -928,6 +939,9 @@ struct ath_hal { HAL_PHYERR_PARAM *pe); void __ahdecl(*ah_getDfsThresh)(struct ath_hal *ah, HAL_PHYERR_PARAM *pe); + HAL_BOOL __ahdecl(*ah_procRadarEvent)(struct ath_hal *ah, + struct ath_rx_status *rxs, uint64_t fulltsf, + const char *buf, HAL_DFS_EVENT *event); /* Key Cache Functions */ uint32_t __ahdecl(*ah_getKeyCacheSize)(struct ath_hal*); Modified: head/sys/dev/ath/ath_hal/ar5212/ar5212.h ============================================================================== --- head/sys/dev/ath/ath_hal/ar5212/ar5212.h Tue Jun 7 09:02:25 2011 (r222814) +++ head/sys/dev/ath/ath_hal/ar5212/ar5212.h Tue Jun 7 09:03:28 2011 (r222815) @@ -622,5 +622,8 @@ extern HAL_BOOL ar5212IsNFCalInProgress( extern HAL_BOOL ar5212WaitNFCalComplete(struct ath_hal *ah, int i); extern void ar5212EnableDfs(struct ath_hal *ah, HAL_PHYERR_PARAM *pe); extern void ar5212GetDfsThresh(struct ath_hal *ah, HAL_PHYERR_PARAM *pe); +extern HAL_BOOL ar5212ProcessRadarEvent(struct ath_hal *ah, + struct ath_rx_status *rxs, uint64_t fulltsf, const char *buf, + HAL_DFS_EVENT *event); #endif /* _ATH_AR5212_H_ */ Modified: head/sys/dev/ath/ath_hal/ar5212/ar5212_attach.c ============================================================================== --- head/sys/dev/ath/ath_hal/ar5212/ar5212_attach.c Tue Jun 7 09:02:25 2011 (r222814) +++ head/sys/dev/ath/ath_hal/ar5212/ar5212_attach.c Tue Jun 7 09:03:28 2011 (r222815) @@ -132,6 +132,7 @@ static const struct ath_hal_private ar52 /* DFS Functions */ .ah_enableDfs = ar5212EnableDfs, .ah_getDfsThresh = ar5212GetDfsThresh, + .ah_procRadarEvent = ar5212ProcessRadarEvent, /* Key Cache Functions */ .ah_getKeyCacheSize = ar5212GetKeyCacheSize, Modified: head/sys/dev/ath/ath_hal/ar5212/ar5212_misc.c ============================================================================== --- head/sys/dev/ath/ath_hal/ar5212/ar5212_misc.c Tue Jun 7 09:02:25 2011 (r222814) +++ head/sys/dev/ath/ath_hal/ar5212/ar5212_misc.c Tue Jun 7 09:03:28 2011 (r222815) @@ -1180,3 +1180,47 @@ ar5212GetDfsThresh(struct ath_hal *ah, H pe->pe_extchannel = AH_FALSE; } +/* + * Process the radar phy error and extract the pulse duration. + */ +HAL_BOOL +ar5212ProcessRadarEvent(struct ath_hal *ah, struct ath_rx_status *rxs, + uint64_t fulltsf, const char *buf, HAL_DFS_EVENT *event) +{ + uint8_t dur; + uint8_t rssi; + + /* Check whether the given phy error is a radar event */ + if ((rxs->rs_phyerr != HAL_PHYERR_RADAR) && + (rxs->rs_phyerr != HAL_PHYERR_FALSE_RADAR_EXT)) + return AH_FALSE; + + /* + * The first byte is the pulse width - if there's + * no data, simply set the duration to 0 + */ + if (rxs->rs_datalen >= 1) + /* The pulse width is byte 0 of the data */ + dur = ((uint8_t) buf[0]) & 0xff; + else + dur = 0; + + /* Pulse RSSI is the normal reported RSSI */ + rssi = (uint8_t) rxs->rs_rssi; + + /* 0 duration/rssi is not a valid radar event */ + if (dur == 0 && rssi == 0) + return AH_FALSE; + + HALDEBUG(ah, HAL_DEBUG_DFS, "%s: rssi=%d, dur=%d\n", + __func__, rssi, dur); + + /* Record the event */ + event->re_full_ts = fulltsf; + event->re_ts = rxs->rs_tstamp; + event->re_rssi = rssi; + event->re_dur = dur; + event->re_flags = HAL_DFS_EVENT_PRICH; + + return AH_TRUE; +} Modified: head/sys/dev/ath/ath_hal/ar5416/ar5416.h ============================================================================== --- head/sys/dev/ath/ath_hal/ar5416/ar5416.h Tue Jun 7 09:02:25 2011 (r222814) +++ head/sys/dev/ath/ath_hal/ar5416/ar5416.h Tue Jun 7 09:03:28 2011 (r222815) @@ -205,6 +205,9 @@ extern HAL_BOOL ar5416SetRifsDelay(struc const struct ieee80211_channel *chan, HAL_BOOL enable); extern void ar5416EnableDfs(struct ath_hal *ah, HAL_PHYERR_PARAM *pe); extern void ar5416GetDfsThresh(struct ath_hal *ah, HAL_PHYERR_PARAM *pe); +extern HAL_BOOL ar5416ProcessRadarEvent(struct ath_hal *ah, + struct ath_rx_status *rxs, uint64_t fulltsf, const char *buf, + HAL_DFS_EVENT *event); extern HAL_BOOL ar5416SetPowerMode(struct ath_hal *ah, HAL_POWER_MODE mode, int setChip); Modified: head/sys/dev/ath/ath_hal/ar5416/ar5416_attach.c ============================================================================== --- head/sys/dev/ath/ath_hal/ar5416/ar5416_attach.c Tue Jun 7 09:02:25 2011 (r222814) +++ head/sys/dev/ath/ath_hal/ar5416/ar5416_attach.c Tue Jun 7 09:03:28 2011 (r222815) @@ -147,6 +147,7 @@ ar5416InitState(struct ath_hal_5416 *ahp /* DFS Functions */ ah->ah_enableDfs = ar5416EnableDfs; ah->ah_getDfsThresh = ar5416GetDfsThresh; + ah->ah_procRadarEvent = ar5416ProcessRadarEvent; /* Power Management Functions */ ah->ah_setPowerMode = ar5416SetPowerMode; Modified: head/sys/dev/ath/ath_hal/ar5416/ar5416_misc.c ============================================================================== --- head/sys/dev/ath/ath_hal/ar5416/ar5416_misc.c Tue Jun 7 09:02:25 2011 (r222814) +++ head/sys/dev/ath/ath_hal/ar5416/ar5416_misc.c Tue Jun 7 09:03:28 2011 (r222815) @@ -692,3 +692,19 @@ ar5416EnableDfs(struct ath_hal *ah, HAL_ OS_REG_WRITE(ah, AR_PHY_RADAR_1, val); } } + +/* + * Extract the radar event information from the given phy error. + * + * Returns AH_TRUE if the phy error was actually a phy error, + * AH_FALSE if the phy error wasn't a phy error. + */ +HAL_BOOL +ar5416ProcessRadarEvent(struct ath_hal *ah, struct ath_rx_status *rxs, + uint64_t fulltsf, const char *buf, HAL_DFS_EVENT *event) +{ + /* + * For now, this isn't implemented. + */ + return AH_FALSE; +} Modified: head/sys/dev/ath/if_athvar.h ============================================================================== --- head/sys/dev/ath/if_athvar.h Tue Jun 7 09:02:25 2011 (r222814) +++ head/sys/dev/ath/if_athvar.h Tue Jun 7 09:03:28 2011 (r222815) @@ -709,6 +709,8 @@ void ath_intr(void *); ((*(_ah)->ah_enableDfs)((_ah), (_param))) #define ath_hal_getdfsthresh(_ah, _param) \ ((*(_ah)->ah_getDfsThresh)((_ah), (_param))) +#define ath_hal_procradarevent(_ah, _rxs, _fulltsf, _buf, _event) \ + ((*(_ah)->ah_procRadarEvent)((_ah), (_rxs), (_fulltsf), (_buf), (_event))) #define ath_hal_gpioCfgOutput(_ah, _gpio, _type) \ ((*(_ah)->ah_gpioCfgOutput)((_ah), (_gpio), (_type))) _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "[email protected]"
