From d373178835f665896f5c4534ecb89ae47911690b Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Wed, 11 Jun 2014 11:28:58 +0000 Subject: [PATCH] ath9k: do a chip reset if noise floor calibration fails, should improve stability Signed-off-by: Felix Fietkau SVN-Revision: 41113 --- .../564-ath9k_cleanup_reset_debug.patch | 60 ++++++ ...65-ath9k_restart_after_nfcal_failure.patch | 172 ++++++++++++++++++ 2 files changed, 232 insertions(+) create mode 100644 package/kernel/mac80211/patches/564-ath9k_cleanup_reset_debug.patch create mode 100644 package/kernel/mac80211/patches/565-ath9k_restart_after_nfcal_failure.patch diff --git a/package/kernel/mac80211/patches/564-ath9k_cleanup_reset_debug.patch b/package/kernel/mac80211/patches/564-ath9k_cleanup_reset_debug.patch new file mode 100644 index 00000000000..c636c5aa277 --- /dev/null +++ b/package/kernel/mac80211/patches/564-ath9k_cleanup_reset_debug.patch @@ -0,0 +1,60 @@ +--- a/drivers/net/wireless/ath/ath9k/debug.c ++++ b/drivers/net/wireless/ath/ath9k/debug.c +@@ -846,36 +846,30 @@ static ssize_t read_file_reset(struct fi + size_t count, loff_t *ppos) + { + struct ath_softc *sc = file->private_data; ++ static const char * const reset_cause[__RESET_TYPE_MAX] = { ++ [RESET_TYPE_BB_HANG] = "Baseband Hang", ++ [RESET_TYPE_BB_WATCHDOG] = "Baseband Watchdog", ++ [RESET_TYPE_FATAL_INT] = "Fatal HW Error", ++ [RESET_TYPE_TX_ERROR] = "TX HW error", ++ [RESET_TYPE_TX_GTT] = "Transmit timeout", ++ [RESET_TYPE_TX_HANG] = "TX Path Hang", ++ [RESET_TYPE_PLL_HANG] = "PLL RX Hang", ++ [RESET_TYPE_MAC_HANG] = "MAC Hang", ++ [RESET_TYPE_BEACON_STUCK] = "Stuck Beacon", ++ [RESET_TYPE_MCI] = "MCI Reset", ++ }; + char buf[512]; + unsigned int len = 0; ++ int i; + +- len += scnprintf(buf + len, sizeof(buf) - len, +- "%17s: %2d\n", "Baseband Hang", +- sc->debug.stats.reset[RESET_TYPE_BB_HANG]); +- len += scnprintf(buf + len, sizeof(buf) - len, +- "%17s: %2d\n", "Baseband Watchdog", +- sc->debug.stats.reset[RESET_TYPE_BB_WATCHDOG]); +- len += scnprintf(buf + len, sizeof(buf) - len, +- "%17s: %2d\n", "Fatal HW Error", +- sc->debug.stats.reset[RESET_TYPE_FATAL_INT]); +- len += scnprintf(buf + len, sizeof(buf) - len, +- "%17s: %2d\n", "TX HW error", +- sc->debug.stats.reset[RESET_TYPE_TX_ERROR]); +- len += scnprintf(buf + len, sizeof(buf) - len, +- "%17s: %2d\n", "TX Path Hang", +- sc->debug.stats.reset[RESET_TYPE_TX_HANG]); +- len += scnprintf(buf + len, sizeof(buf) - len, +- "%17s: %2d\n", "PLL RX Hang", +- sc->debug.stats.reset[RESET_TYPE_PLL_HANG]); +- len += scnprintf(buf + len, sizeof(buf) - len, +- "%17s: %2d\n", "MAC Hang", +- sc->debug.stats.reset[RESET_TYPE_MAC_HANG]); +- len += scnprintf(buf + len, sizeof(buf) - len, +- "%17s: %2d\n", "Stuck Beacon", +- sc->debug.stats.reset[RESET_TYPE_BEACON_STUCK]); +- len += scnprintf(buf + len, sizeof(buf) - len, +- "%17s: %2d\n", "MCI Reset", +- sc->debug.stats.reset[RESET_TYPE_MCI]); ++ for (i = 0; i < ARRAY_SIZE(reset_cause); i++) { ++ if (!reset_cause[i]) ++ continue; ++ ++ len += scnprintf(buf + len, sizeof(buf) - len, ++ "%17s: %2d\n", reset_cause[i], ++ sc->debug.stats.reset[i]); ++ } + + if (len > sizeof(buf)) + len = sizeof(buf); diff --git a/package/kernel/mac80211/patches/565-ath9k_restart_after_nfcal_failure.patch b/package/kernel/mac80211/patches/565-ath9k_restart_after_nfcal_failure.patch new file mode 100644 index 00000000000..366cc3c7f51 --- /dev/null +++ b/package/kernel/mac80211/patches/565-ath9k_restart_after_nfcal_failure.patch @@ -0,0 +1,172 @@ +--- a/drivers/net/wireless/ath/ath9k/calib.c ++++ b/drivers/net/wireless/ath/ath9k/calib.c +@@ -234,7 +234,7 @@ void ath9k_hw_start_nfcal(struct ath_hw + REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF); + } + +-void ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan) ++int ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan) + { + struct ath9k_nfcal_hist *h = NULL; + unsigned i, j; +@@ -301,7 +301,7 @@ void ath9k_hw_loadnf(struct ath_hw *ah, + ath_dbg(common, ANY, + "Timeout while waiting for nf to load: AR_PHY_AGC_CONTROL=0x%x\n", + REG_READ(ah, AR_PHY_AGC_CONTROL)); +- return; ++ return -ETIMEDOUT; + } + + /* +@@ -322,6 +322,8 @@ void ath9k_hw_loadnf(struct ath_hw *ah, + } + } + REGWRITE_BUFFER_FLUSH(ah); ++ ++ return 0; + } + + +--- a/drivers/net/wireless/ath/ath9k/calib.h ++++ b/drivers/net/wireless/ath/ath9k/calib.h +@@ -109,7 +109,7 @@ struct ath9k_pacal_info{ + + bool ath9k_hw_reset_calvalid(struct ath_hw *ah); + void ath9k_hw_start_nfcal(struct ath_hw *ah, bool update); +-void ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan); ++int ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan); + bool ath9k_hw_getnf(struct ath_hw *ah, struct ath9k_channel *chan); + void ath9k_init_nfcal_hist_buffer(struct ath_hw *ah, + struct ath9k_channel *chan); +--- a/drivers/net/wireless/ath/ath9k/ar9002_calib.c ++++ b/drivers/net/wireless/ath/ath9k/ar9002_calib.c +@@ -657,14 +657,13 @@ static void ar9002_hw_olc_temp_compensat + ar9280_hw_olc_temp_compensation(ah); + } + +-static bool ar9002_hw_calibrate(struct ath_hw *ah, +- struct ath9k_channel *chan, +- u8 rxchainmask, +- bool longcal) ++static int ar9002_hw_calibrate(struct ath_hw *ah, struct ath9k_channel *chan, ++ u8 rxchainmask, bool longcal) + { + bool iscaldone = true; + struct ath9k_cal_list *currCal = ah->cal_list_curr; + bool nfcal, nfcal_pending = false; ++ int ret; + + nfcal = !!(REG_READ(ah, AR_PHY_AGC_CONTROL) & AR_PHY_AGC_CONTROL_NF); + if (ah->caldata) +@@ -698,7 +697,9 @@ static bool ar9002_hw_calibrate(struct a + * NF is slow time-variant, so it is OK to use a + * historical value. + */ +- ath9k_hw_loadnf(ah, ah->curchan); ++ ret = ath9k_hw_loadnf(ah, ah->curchan); ++ if (ret < 0) ++ return ret; + } + + if (longcal) { +--- a/drivers/net/wireless/ath/ath9k/hw-ops.h ++++ b/drivers/net/wireless/ath/ath9k/hw-ops.h +@@ -41,10 +41,9 @@ static inline void ath9k_hw_set_desc_lin + ath9k_hw_ops(ah)->set_desc_link(ds, link); + } + +-static inline bool ath9k_hw_calibrate(struct ath_hw *ah, +- struct ath9k_channel *chan, +- u8 rxchainmask, +- bool longcal) ++static inline int ath9k_hw_calibrate(struct ath_hw *ah, ++ struct ath9k_channel *chan, ++ u8 rxchainmask, bool longcal) + { + return ath9k_hw_ops(ah)->calibrate(ah, chan, rxchainmask, longcal); + } +--- a/drivers/net/wireless/ath/ath9k/ar9003_calib.c ++++ b/drivers/net/wireless/ath/ath9k/ar9003_calib.c +@@ -121,13 +121,12 @@ static bool ar9003_hw_per_calibration(st + return iscaldone; + } + +-static bool ar9003_hw_calibrate(struct ath_hw *ah, +- struct ath9k_channel *chan, +- u8 rxchainmask, +- bool longcal) ++static int ar9003_hw_calibrate(struct ath_hw *ah, struct ath9k_channel *chan, ++ u8 rxchainmask, bool longcal) + { + bool iscaldone = true; + struct ath9k_cal_list *currCal = ah->cal_list_curr; ++ int ret; + + /* + * For given calibration: +@@ -163,7 +162,9 @@ static bool ar9003_hw_calibrate(struct a + * NF is slow time-variant, so it is OK to use a historical + * value. + */ +- ath9k_hw_loadnf(ah, ah->curchan); ++ ret = ath9k_hw_loadnf(ah, ah->curchan); ++ if (ret < 0) ++ return ret; + + /* start NF calibration, without updating BB NF register */ + ath9k_hw_start_nfcal(ah, false); +--- a/drivers/net/wireless/ath/ath9k/hw.h ++++ b/drivers/net/wireless/ath/ath9k/hw.h +@@ -695,10 +695,8 @@ struct ath_hw_ops { + bool power_off); + void (*rx_enable)(struct ath_hw *ah); + void (*set_desc_link)(void *ds, u32 link); +- bool (*calibrate)(struct ath_hw *ah, +- struct ath9k_channel *chan, +- u8 rxchainmask, +- bool longcal); ++ int (*calibrate)(struct ath_hw *ah, struct ath9k_channel *chan, ++ u8 rxchainmask, bool longcal); + bool (*get_isr)(struct ath_hw *ah, enum ath9k_int *masked, + u32 *sync_cause_p); + void (*set_txdesc)(struct ath_hw *ah, void *ds, +--- a/drivers/net/wireless/ath/ath9k/debug.h ++++ b/drivers/net/wireless/ath/ath9k/debug.h +@@ -49,6 +49,7 @@ enum ath_reset_type { + RESET_TYPE_MAC_HANG, + RESET_TYPE_BEACON_STUCK, + RESET_TYPE_MCI, ++ RESET_TYPE_CALIBRATION, + __RESET_TYPE_MAX + }; + +--- a/drivers/net/wireless/ath/ath9k/debug.c ++++ b/drivers/net/wireless/ath/ath9k/debug.c +@@ -857,6 +857,7 @@ static ssize_t read_file_reset(struct fi + [RESET_TYPE_MAC_HANG] = "MAC Hang", + [RESET_TYPE_BEACON_STUCK] = "Stuck Beacon", + [RESET_TYPE_MCI] = "MCI Reset", ++ [RESET_TYPE_CALIBRATION] = "Calibration error", + }; + char buf[512]; + unsigned int len = 0; +--- a/drivers/net/wireless/ath/ath9k/link.c ++++ b/drivers/net/wireless/ath/ath9k/link.c +@@ -376,9 +376,14 @@ void ath_ani_calibrate(unsigned long dat + + /* Perform calibration if necessary */ + if (longcal || shortcal) { +- common->ani.caldone = +- ath9k_hw_calibrate(ah, ah->curchan, +- ah->rxchainmask, longcal); ++ int ret = ath9k_hw_calibrate(ah, ah->curchan, ah->rxchainmask, ++ longcal); ++ if (ret < 0) { ++ ath9k_queue_reset(sc, RESET_TYPE_CALIBRATION); ++ return; ++ } ++ ++ common->ani.caldone = ret; + } + + ath_dbg(common, ANI, -- 2.30.2