* [PATCH 2/4] ath6kl: Recover from fw crash
2012-08-29 14:10 [PATCH 1/4] ath6kl: Refactor ath6kl_init_hw_start() and ath6kl_init_hw_stop() Vasanthakumar Thiagarajan
@ 2012-08-29 14:10 ` Vasanthakumar Thiagarajan
2012-08-31 15:45 ` Jin, Navy
2012-08-29 14:10 ` [PATCH 3/4] ath6kl: Add support to detect fw error through heart beat Vasanthakumar Thiagarajan
` (2 subsequent siblings)
3 siblings, 1 reply; 7+ messages in thread
From: Vasanthakumar Thiagarajan @ 2012-08-29 14:10 UTC (permalink / raw)
To: kvalo; +Cc: linux-wireless, ath6kl-devel
Re-initialize the target when fw crash is reported.
This would make the device functional again after
target crash. During the target re-initialization
it is made sure that target is not bugged with data/cmd
request, ar->state ATH6KL_STATE_RECOVERY is used
for this purpose.
Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@qca.qualcomm.com>
---
drivers/net/wireless/ath/ath6kl/Makefile | 1 +
drivers/net/wireless/ath/ath6kl/cfg80211.c | 17 +++++++-
drivers/net/wireless/ath/ath6kl/core.c | 4 ++
drivers/net/wireless/ath/ath6kl/core.h | 18 ++++++++
drivers/net/wireless/ath/ath6kl/debug.h | 1 +
drivers/net/wireless/ath/ath6kl/hif.c | 1 +
drivers/net/wireless/ath/ath6kl/init.c | 19 ++++++++
drivers/net/wireless/ath/ath6kl/recovery.c | 62 ++++++++++++++++++++++++++++
drivers/net/wireless/ath/ath6kl/sdio.c | 3 +
drivers/net/wireless/ath/ath6kl/txrx.c | 3 +-
10 files changed, 126 insertions(+), 3 deletions(-)
create mode 100644 drivers/net/wireless/ath/ath6kl/recovery.c
diff --git a/drivers/net/wireless/ath/ath6kl/Makefile b/drivers/net/wireless/ath/ath6kl/Makefile
index 8cae888..cab0ec0 100644
--- a/drivers/net/wireless/ath/ath6kl/Makefile
+++ b/drivers/net/wireless/ath/ath6kl/Makefile
@@ -34,6 +34,7 @@ ath6kl_core-y += main.o
ath6kl_core-y += txrx.o
ath6kl_core-y += wmi.o
ath6kl_core-y += core.o
+ath6kl_core-y += recovery.o
ath6kl_core-$(CONFIG_NL80211_TESTMODE) += testmode.o
obj-$(CONFIG_ATH6KL_SDIO) += ath6kl_sdio.o
diff --git a/drivers/net/wireless/ath/ath6kl/cfg80211.c b/drivers/net/wireless/ath/ath6kl/cfg80211.c
index fb20ff6..b4c549d 100644
--- a/drivers/net/wireless/ath/ath6kl/cfg80211.c
+++ b/drivers/net/wireless/ath/ath6kl/cfg80211.c
@@ -2510,14 +2510,23 @@ static int __ath6kl_cfg80211_suspend(struct wiphy *wiphy,
{
struct ath6kl *ar = wiphy_priv(wiphy);
+ ath6kl_recovery_suspend(ar);
+
return ath6kl_hif_suspend(ar, wow);
}
static int __ath6kl_cfg80211_resume(struct wiphy *wiphy)
{
struct ath6kl *ar = wiphy_priv(wiphy);
+ int err;
+
+ err = ath6kl_hif_resume(ar);
+ if (err)
+ return err;
- return ath6kl_hif_resume(ar);
+ ar->fw_recovery.enable = true;
+
+ return 0;
}
/*
@@ -3441,6 +3450,10 @@ void ath6kl_cfg80211_stop(struct ath6kl_vif *vif)
clear_bit(CONNECTED, &vif->flags);
clear_bit(CONNECT_PEND, &vif->flags);
+ /* Stop netdev queues, needed during recovery */
+ netif_stop_queue(vif->ndev);
+ netif_carrier_off(vif->ndev);
+
/* disable scanning */
if (ath6kl_wmi_scanparams_cmd(vif->ar->wmi, vif->fw_vif_idx, 0xFFFF,
0, 0, 0, 0, 0, 0, 0, 0, 0) != 0)
@@ -3454,7 +3467,7 @@ void ath6kl_cfg80211_stop_all(struct ath6kl *ar)
struct ath6kl_vif *vif;
vif = ath6kl_vif_first(ar);
- if (!vif) {
+ if (!vif && ar->state != ATH6KL_STATE_RECOVERY) {
/* save the current power mode before enabling power save */
ar->wmi->saved_pwr_mode = ar->wmi->pwr_mode;
diff --git a/drivers/net/wireless/ath/ath6kl/core.c b/drivers/net/wireless/ath/ath6kl/core.c
index 82c4dd2..adcaa96 100644
--- a/drivers/net/wireless/ath/ath6kl/core.c
+++ b/drivers/net/wireless/ath/ath6kl/core.c
@@ -202,6 +202,8 @@ int ath6kl_core_init(struct ath6kl *ar, enum ath6kl_htc_type htc_type)
ath6kl_dbg(ATH6KL_DBG_TRC, "%s: name=%s dev=0x%p, ar=0x%p\n",
__func__, wdev->netdev->name, wdev->netdev, ar);
+ ath6kl_recovery_init(ar);
+
return ret;
err_rxbuf_cleanup:
@@ -291,6 +293,8 @@ void ath6kl_core_cleanup(struct ath6kl *ar)
{
ath6kl_hif_power_off(ar);
+ ath6kl_recovery_cleanup(ar);
+
destroy_workqueue(ar->ath6kl_wq);
if (ar->htc_target)
diff --git a/drivers/net/wireless/ath/ath6kl/core.h b/drivers/net/wireless/ath/ath6kl/core.h
index 8b31b9a..c7dcdad 100644
--- a/drivers/net/wireless/ath/ath6kl/core.h
+++ b/drivers/net/wireless/ath/ath6kl/core.h
@@ -645,6 +645,12 @@ enum ath6kl_state {
ATH6KL_STATE_DEEPSLEEP,
ATH6KL_STATE_CUTPOWER,
ATH6KL_STATE_WOW,
+ ATH6KL_STATE_RECOVERY,
+};
+
+/* Fw error recovery */
+enum ath6kl_fw_err {
+ ATH6KL_FW_ASSERT,
};
struct ath6kl {
@@ -790,6 +796,12 @@ struct ath6kl {
bool wiphy_registered;
+ struct ath6kl_fw_recovery {
+ bool enable;
+ struct work_struct recovery_work;
+ unsigned long err_reason;
+ } fw_recovery;
+
#ifdef CONFIG_ATH6KL_DEBUG
struct {
struct sk_buff_head fwlog_queue;
@@ -925,4 +937,10 @@ int ath6kl_core_init(struct ath6kl *ar, enum ath6kl_htc_type htc_type);
void ath6kl_core_cleanup(struct ath6kl *ar);
void ath6kl_core_destroy(struct ath6kl *ar);
+/* Fw error recovery */
+void ath6kl_init_hw_restart(struct ath6kl *ar);
+void ath6kl_recovery_err_notify(struct ath6kl *ar, enum ath6kl_fw_err reason);
+void ath6kl_recovery_init(struct ath6kl *ar);
+void ath6kl_recovery_cleanup(struct ath6kl *ar);
+void ath6kl_recovery_suspend(struct ath6kl *ar);
#endif /* CORE_H */
diff --git a/drivers/net/wireless/ath/ath6kl/debug.h b/drivers/net/wireless/ath/ath6kl/debug.h
index 49639d8..f97cd4e 100644
--- a/drivers/net/wireless/ath/ath6kl/debug.h
+++ b/drivers/net/wireless/ath/ath6kl/debug.h
@@ -44,6 +44,7 @@ enum ATH6K_DEBUG_MASK {
ATH6KL_DBG_SUSPEND = BIT(20),
ATH6KL_DBG_USB = BIT(21),
ATH6KL_DBG_USB_BULK = BIT(22),
+ ATH6KL_DBG_RECOVERY = BIT(23),
ATH6KL_DBG_ANY = 0xffffffff /* enable all logs */
};
diff --git a/drivers/net/wireless/ath/ath6kl/hif.c b/drivers/net/wireless/ath/ath6kl/hif.c
index 68ed6c2..029914a 100644
--- a/drivers/net/wireless/ath/ath6kl/hif.c
+++ b/drivers/net/wireless/ath/ath6kl/hif.c
@@ -136,6 +136,7 @@ static int ath6kl_hif_proc_dbg_intr(struct ath6kl_device *dev)
ath6kl_hif_dump_fw_crash(dev->ar);
ath6kl_read_fwlogs(dev->ar);
+ ath6kl_recovery_err_notify(dev->ar, ATH6KL_FW_ASSERT);
return ret;
}
diff --git a/drivers/net/wireless/ath/ath6kl/init.c b/drivers/net/wireless/ath/ath6kl/init.c
index be27ebe..301443c 100644
--- a/drivers/net/wireless/ath/ath6kl/init.c
+++ b/drivers/net/wireless/ath/ath6kl/init.c
@@ -1695,6 +1695,25 @@ int ath6kl_init_hw_stop(struct ath6kl *ar)
return 0;
}
+void ath6kl_init_hw_restart(struct ath6kl *ar)
+{
+
+ ar->state = ATH6KL_STATE_RECOVERY;
+
+ ath6kl_cfg80211_stop_all(ar);
+
+ if (__ath6kl_init_hw_stop(ar))
+ return;
+
+ if (__ath6kl_init_hw_start(ar)) {
+ ath6kl_dbg(ATH6KL_DBG_RECOVERY, "Failed to restart during fw error recovery\n");
+ return;
+ }
+
+ ar->state = ATH6KL_STATE_ON;
+ ar->fw_recovery.err_reason = 0;
+}
+
/* FIXME: move this to cfg80211.c and rename to ath6kl_cfg80211_vif_stop() */
void ath6kl_cleanup_vif(struct ath6kl_vif *vif, bool wmi_ready)
{
diff --git a/drivers/net/wireless/ath/ath6kl/recovery.c b/drivers/net/wireless/ath/ath6kl/recovery.c
new file mode 100644
index 0000000..c225fc4
--- /dev/null
+++ b/drivers/net/wireless/ath/ath6kl/recovery.c
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2012 Qualcomm Atheros, Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "core.h"
+#include "cfg80211.h"
+#include "debug.h"
+
+static void ath6kl_recovery_work(struct work_struct *work)
+{
+ struct ath6kl *ar = container_of(work, struct ath6kl,
+ fw_recovery.recovery_work);
+
+ ath6kl_init_hw_restart(ar);
+}
+
+void ath6kl_recovery_err_notify(struct ath6kl *ar, enum ath6kl_fw_err reason)
+{
+ ath6kl_dbg(ATH6KL_DBG_RECOVERY, "Fw error detected, reason:%d\n",
+ reason);
+
+ set_bit(reason, &ar->fw_recovery.err_reason);
+
+ if (ar->fw_recovery.enable && ar->state != ATH6KL_STATE_RECOVERY)
+ queue_work(ar->ath6kl_wq, &ar->fw_recovery.recovery_work);
+}
+
+void ath6kl_recovery_init(struct ath6kl *ar)
+{
+ struct ath6kl_fw_recovery *recovery = &ar->fw_recovery;
+
+ recovery->enable = true;
+ INIT_WORK(&recovery->recovery_work, ath6kl_recovery_work);
+}
+
+void ath6kl_recovery_cleanup(struct ath6kl *ar)
+{
+ ar->fw_recovery.enable = false;
+
+ cancel_work_sync(&ar->fw_recovery.recovery_work);
+}
+
+void ath6kl_recovery_suspend(struct ath6kl *ar)
+{
+ ath6kl_recovery_cleanup(ar);
+
+ /* Process pending fw error detection */
+ if (ar->fw_recovery.err_reason)
+ ath6kl_init_hw_restart(ar);
+}
diff --git a/drivers/net/wireless/ath/ath6kl/sdio.c b/drivers/net/wireless/ath/ath6kl/sdio.c
index cc17fe0..a72a4d0 100644
--- a/drivers/net/wireless/ath/ath6kl/sdio.c
+++ b/drivers/net/wireless/ath/ath6kl/sdio.c
@@ -931,6 +931,9 @@ static int ath6kl_sdio_resume(struct ath6kl *ar)
case ATH6KL_STATE_RESUMING:
break;
+
+ case ATH6KL_STATE_RECOVERY:
+ break;
}
ath6kl_cfg80211_resume(ar);
diff --git a/drivers/net/wireless/ath/ath6kl/txrx.c b/drivers/net/wireless/ath/ath6kl/txrx.c
index 740a488..cbe1a9d 100644
--- a/drivers/net/wireless/ath/ath6kl/txrx.c
+++ b/drivers/net/wireless/ath/ath6kl/txrx.c
@@ -288,7 +288,8 @@ int ath6kl_control_tx(void *devt, struct sk_buff *skb,
int status = 0;
struct ath6kl_cookie *cookie = NULL;
- if (WARN_ON_ONCE(ar->state == ATH6KL_STATE_WOW)) {
+ if (WARN_ON_ONCE(ar->state == ATH6KL_STATE_WOW) ||
+ ar->state == ATH6KL_STATE_RECOVERY) {
dev_kfree_skb(skb);
return -EACCES;
}
--
1.7.0.4
^ permalink raw reply related [flat|nested] 7+ messages in thread* Re: [PATCH 2/4] ath6kl: Recover from fw crash
2012-08-29 14:10 ` [PATCH 2/4] ath6kl: Recover from fw crash Vasanthakumar Thiagarajan
@ 2012-08-31 15:45 ` Jin, Navy
2012-09-03 3:54 ` Vasanthakumar Thiagarajan
0 siblings, 1 reply; 7+ messages in thread
From: Jin, Navy @ 2012-08-31 15:45 UTC (permalink / raw)
To: Thiagarajan, Vasanthakumar, Valo, Kalle
Cc: linux-wireless@vger.kernel.org, ath6kl-devel
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH 2/4] ath6kl: Recover from fw crash
2012-08-31 15:45 ` Jin, Navy
@ 2012-09-03 3:54 ` Vasanthakumar Thiagarajan
0 siblings, 0 replies; 7+ messages in thread
From: Vasanthakumar Thiagarajan @ 2012-09-03 3:54 UTC (permalink / raw)
To: Jin, Navy; +Cc: Valo, Kalle, linux-wireless@vger.kernel.org, ath6kl-devel
On Friday 31 August 2012 09:15 PM, Jin, Navy wrote:
> Can this feature be disabled by some control bit or module parameters?Once enabled,it is better for user,but more hard to find the root cause,or log chip info before recovery?
> Regards，
Good point, i'll send a follow up patch. thanks!.
Vasanth
^ permalink raw reply [flat|nested] 7+ messages in thread
* [PATCH 3/4] ath6kl: Add support to detect fw error through heart beat
2012-08-29 14:10 [PATCH 1/4] ath6kl: Refactor ath6kl_init_hw_start() and ath6kl_init_hw_stop() Vasanthakumar Thiagarajan
2012-08-29 14:10 ` [PATCH 2/4] ath6kl: Recover from fw crash Vasanthakumar Thiagarajan
@ 2012-08-29 14:10 ` Vasanthakumar Thiagarajan
2012-08-29 14:10 ` [PATCH 4/4] ath6kl: Recover from "wmi ctrl ep is full" condition Vasanthakumar Thiagarajan
2012-08-30 9:27 ` [PATCH 1/4] ath6kl: Refactor ath6kl_init_hw_start() and ath6kl_init_hw_stop() Kalle Valo
3 siblings, 0 replies; 7+ messages in thread
From: Vasanthakumar Thiagarajan @ 2012-08-29 14:10 UTC (permalink / raw)
To: kvalo; +Cc: linux-wireless, ath6kl-devel
This patch adds support to detect fw error condition by sending
periodic message (heart beat challenge) to firmware. Upon reception
of the message, fw would send a response event to driver. When
there are no reponses from fw for about 5 cmd driver would
trigger the recovery logic assuming that fw has gone into an
error state.
Capable fw will advertise this capability through
ATH6KL_FW_CAPABILITY_HEART_BEAT_POLL bit. This feature
is disabled by default, can be enabled through a modparam
(heart_beat_poll). This modparam also confiures the polling
interval in msecs.
Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@qca.qualcomm.com>
---
drivers/net/wireless/ath/ath6kl/cfg80211.c | 2 +-
drivers/net/wireless/ath/ath6kl/core.c | 9 +++
drivers/net/wireless/ath/ath6kl/core.h | 16 +++++
drivers/net/wireless/ath/ath6kl/init.c | 6 --
drivers/net/wireless/ath/ath6kl/recovery.c | 89 +++++++++++++++++++++++++++-
drivers/net/wireless/ath/ath6kl/wmi.c | 14 ++++
drivers/net/wireless/ath/ath6kl/wmi.h | 2 +
7 files changed, 129 insertions(+), 9 deletions(-)
diff --git a/drivers/net/wireless/ath/ath6kl/cfg80211.c b/drivers/net/wireless/ath/ath6kl/cfg80211.c
index b4c549d..7c652ff 100644
--- a/drivers/net/wireless/ath/ath6kl/cfg80211.c
+++ b/drivers/net/wireless/ath/ath6kl/cfg80211.c
@@ -2524,7 +2524,7 @@ static int __ath6kl_cfg80211_resume(struct wiphy *wiphy)
if (err)
return err;
- ar->fw_recovery.enable = true;
+ ath6kl_recovery_resume(ar);
return 0;
}
diff --git a/drivers/net/wireless/ath/ath6kl/core.c b/drivers/net/wireless/ath/ath6kl/core.c
index adcaa96..fd5dd3a 100644
--- a/drivers/net/wireless/ath/ath6kl/core.c
+++ b/drivers/net/wireless/ath/ath6kl/core.c
@@ -33,6 +33,7 @@ static unsigned int wow_mode;
static unsigned int uart_debug;
static unsigned int ath6kl_p2p;
static unsigned int testmode;
+static unsigned int heart_beat_poll;
module_param(debug_mask, uint, 0644);
module_param(suspend_mode, uint, 0644);
@@ -40,6 +41,9 @@ module_param(wow_mode, uint, 0644);
module_param(uart_debug, uint, 0644);
module_param(ath6kl_p2p, uint, 0644);
module_param(testmode, uint, 0644);
+module_param(heart_beat_poll, uint, 0644);
+MODULE_PARM_DESC(heart_beat_poll, "Enable fw error detection periodic" \
+ "polling. This also specifies the polling interval in msecs");
void ath6kl_core_tx_complete(struct ath6kl *ar, struct sk_buff *skb)
{
@@ -202,6 +206,11 @@ int ath6kl_core_init(struct ath6kl *ar, enum ath6kl_htc_type htc_type)
ath6kl_dbg(ATH6KL_DBG_TRC, "%s: name=%s dev=0x%p, ar=0x%p\n",
__func__, wdev->netdev->name, wdev->netdev, ar);
+ if (heart_beat_poll &&
+ test_bit(ATH6KL_FW_CAPABILITY_HEART_BEAT_POLL,
+ ar->fw_capabilities))
+ ar->fw_recovery.hb_poll = heart_beat_poll;
+
ath6kl_recovery_init(ar);
return ret;
diff --git a/drivers/net/wireless/ath/ath6kl/core.h b/drivers/net/wireless/ath/ath6kl/core.h
index c7dcdad..b2cbecf 100644
--- a/drivers/net/wireless/ath/ath6kl/core.h
+++ b/drivers/net/wireless/ath/ath6kl/core.h
@@ -130,6 +130,12 @@ enum ath6kl_fw_capability {
/* Firmware supports sched scan decoupled from host sleep */
ATH6KL_FW_CAPABILITY_SCHED_SCAN_V2,
+ /*
+ * Firmware capability for hang detection through heart beat
+ * challenge messages.
+ */
+ ATH6KL_FW_CAPABILITY_HEART_BEAT_POLL,
+
/* this needs to be last */
ATH6KL_FW_CAPABILITY_MAX,
};
@@ -649,8 +655,11 @@ enum ath6kl_state {
};
/* Fw error recovery */
+#define ATH6KL_HB_RESP_MISS_THRES 5
+
enum ath6kl_fw_err {
ATH6KL_FW_ASSERT,
+ ATH6KL_FW_HB_RESP_FAILURE,
};
struct ath6kl {
@@ -800,6 +809,11 @@ struct ath6kl {
bool enable;
struct work_struct recovery_work;
unsigned long err_reason;
+ unsigned long hb_poll;
+ struct timer_list hb_timer;
+ u32 seq_num;
+ bool hb_pending;
+ u8 hb_misscnt;
} fw_recovery;
#ifdef CONFIG_ATH6KL_DEBUG
@@ -940,7 +954,9 @@ void ath6kl_core_destroy(struct ath6kl *ar);
/* Fw error recovery */
void ath6kl_init_hw_restart(struct ath6kl *ar);
void ath6kl_recovery_err_notify(struct ath6kl *ar, enum ath6kl_fw_err reason);
+void ath6kl_recovery_hb_event(struct ath6kl *ar, u32 cookie);
void ath6kl_recovery_init(struct ath6kl *ar);
void ath6kl_recovery_cleanup(struct ath6kl *ar);
void ath6kl_recovery_suspend(struct ath6kl *ar);
+void ath6kl_recovery_resume(struct ath6kl *ar);
#endif /* CORE_H */
diff --git a/drivers/net/wireless/ath/ath6kl/init.c b/drivers/net/wireless/ath/ath6kl/init.c
index 301443c..6e270fa 100644
--- a/drivers/net/wireless/ath/ath6kl/init.c
+++ b/drivers/net/wireless/ath/ath6kl/init.c
@@ -1697,9 +1697,6 @@ int ath6kl_init_hw_stop(struct ath6kl *ar)
void ath6kl_init_hw_restart(struct ath6kl *ar)
{
-
- ar->state = ATH6KL_STATE_RECOVERY;
-
ath6kl_cfg80211_stop_all(ar);
if (__ath6kl_init_hw_stop(ar))
@@ -1709,9 +1706,6 @@ void ath6kl_init_hw_restart(struct ath6kl *ar)
ath6kl_dbg(ATH6KL_DBG_RECOVERY, "Failed to restart during fw error recovery\n");
return;
}
-
- ar->state = ATH6KL_STATE_ON;
- ar->fw_recovery.err_reason = 0;
}
/* FIXME: move this to cfg80211.c and rename to ath6kl_cfg80211_vif_stop() */
diff --git a/drivers/net/wireless/ath/ath6kl/recovery.c b/drivers/net/wireless/ath/ath6kl/recovery.c
index c225fc4..9161d84 100644
--- a/drivers/net/wireless/ath/ath6kl/recovery.c
+++ b/drivers/net/wireless/ath/ath6kl/recovery.c
@@ -23,7 +23,18 @@ static void ath6kl_recovery_work(struct work_struct *work)
struct ath6kl *ar = container_of(work, struct ath6kl,
fw_recovery.recovery_work);
+ ar->state = ATH6KL_STATE_RECOVERY;
+
+ del_timer_sync(&ar->fw_recovery.hb_timer);
+
ath6kl_init_hw_restart(ar);
+
+ ar->state = ATH6KL_STATE_ON;
+ ar->fw_recovery.err_reason = 0;
+
+ if (ar->fw_recovery.enable)
+ mod_timer(&ar->fw_recovery.hb_timer, jiffies +
+ msecs_to_jiffies(ar->fw_recovery.hb_poll));
}
void ath6kl_recovery_err_notify(struct ath6kl *ar, enum ath6kl_fw_err reason)
@@ -37,18 +48,72 @@ void ath6kl_recovery_err_notify(struct ath6kl *ar, enum ath6kl_fw_err reason)
queue_work(ar->ath6kl_wq, &ar->fw_recovery.recovery_work);
}
+void ath6kl_recovery_hb_event(struct ath6kl *ar, u32 cookie)
+{
+ if (cookie == ar->fw_recovery.seq_num)
+ ar->fw_recovery.hb_pending = false;
+}
+
+static void ath6kl_recovery_hb_timer(unsigned long data)
+{
+ struct ath6kl *ar = (struct ath6kl *) data;
+ int err;
+
+ if (!ar->fw_recovery.enable)
+ return;
+
+ if (ar->fw_recovery.hb_pending)
+ ar->fw_recovery.hb_misscnt++;
+ else
+ ar->fw_recovery.hb_misscnt = 0;
+
+ if (ar->fw_recovery.hb_misscnt > ATH6KL_HB_RESP_MISS_THRES) {
+ ar->fw_recovery.hb_misscnt = 0;
+ ar->fw_recovery.seq_num = 0;
+ ar->fw_recovery.hb_pending = false;
+ ath6kl_recovery_err_notify(ar, ATH6KL_FW_HB_RESP_FAILURE);
+ return;
+ }
+
+ ar->fw_recovery.seq_num++;
+ ar->fw_recovery.hb_pending = true;
+
+ err = ath6kl_wmi_get_challenge_resp_cmd(ar->wmi,
+ ar->fw_recovery.seq_num, 0);
+ if (err)
+ ath6kl_warn("Failed to send hb challenge request, err:%d\n",
+ err);
+
+ if ((ar->state == ATH6KL_STATE_RECOVERY) || !ar->fw_recovery.enable)
+ return;
+
+ mod_timer(&ar->fw_recovery.hb_timer, jiffies +
+ msecs_to_jiffies(ar->fw_recovery.hb_poll));
+}
+
void ath6kl_recovery_init(struct ath6kl *ar)
{
struct ath6kl_fw_recovery *recovery = &ar->fw_recovery;
recovery->enable = true;
INIT_WORK(&recovery->recovery_work, ath6kl_recovery_work);
+ recovery->seq_num = 0;
+ recovery->hb_misscnt = 0;
+ ar->fw_recovery.hb_pending = false;
+ ar->fw_recovery.hb_timer.function = ath6kl_recovery_hb_timer;
+ ar->fw_recovery.hb_timer.data = (unsigned long) ar;
+ init_timer_deferrable(&ar->fw_recovery.hb_timer);
+
+ if (ar->fw_recovery.hb_poll)
+ mod_timer(&ar->fw_recovery.hb_timer, jiffies +
+ msecs_to_jiffies(ar->fw_recovery.hb_poll));
}
void ath6kl_recovery_cleanup(struct ath6kl *ar)
{
ar->fw_recovery.enable = false;
+ del_timer_sync(&ar->fw_recovery.hb_timer);
cancel_work_sync(&ar->fw_recovery.recovery_work);
}
@@ -56,7 +121,27 @@ void ath6kl_recovery_suspend(struct ath6kl *ar)
{
ath6kl_recovery_cleanup(ar);
+ if (!ar->fw_recovery.err_reason)
+ return;
+
/* Process pending fw error detection */
- if (ar->fw_recovery.err_reason)
- ath6kl_init_hw_restart(ar);
+ ar->fw_recovery.err_reason = 0;
+ WARN_ON(ar->state != ATH6KL_STATE_ON);
+ ar->state = ATH6KL_STATE_RECOVERY;
+ ath6kl_init_hw_restart(ar);
+ ar->state = ATH6KL_STATE_ON;
+}
+
+void ath6kl_recovery_resume(struct ath6kl *ar)
+{
+ ar->fw_recovery.enable = true;
+
+ if (!ar->fw_recovery.hb_poll)
+ return;
+
+ ar->fw_recovery.hb_pending = false;
+ ar->fw_recovery.seq_num = 0;
+ ar->fw_recovery.hb_misscnt = 0;
+ mod_timer(&ar->fw_recovery.hb_timer,
+ jiffies + msecs_to_jiffies(ar->fw_recovery.hb_poll));
}
diff --git a/drivers/net/wireless/ath/ath6kl/wmi.c b/drivers/net/wireless/ath/ath6kl/wmi.c
index e95b035..2624ce8 100644
--- a/drivers/net/wireless/ath/ath6kl/wmi.c
+++ b/drivers/net/wireless/ath/ath6kl/wmi.c
@@ -3756,6 +3756,19 @@ int ath6kl_wmi_set_inact_period(struct wmi *wmi, u8 if_idx, int inact_timeout)
NO_SYNC_WMIFLAG);
}
+static void ath6kl_wmi_hb_challenge_resp_event(struct wmi *wmi, u8 *datap,
+ int len)
+{
+ struct wmix_hb_challenge_resp_cmd *cmd;
+
+ if (len < sizeof(struct wmix_hb_challenge_resp_cmd))
+ return;
+
+ cmd = (struct wmix_hb_challenge_resp_cmd *) datap;
+ ath6kl_recovery_hb_event(wmi->parent_dev,
+ le32_to_cpu(cmd->cookie));
+}
+
static int ath6kl_wmi_control_rx_xtnd(struct wmi *wmi, struct sk_buff *skb)
{
struct wmix_cmd_hdr *cmd;
@@ -3780,6 +3793,7 @@ static int ath6kl_wmi_control_rx_xtnd(struct wmi *wmi, struct sk_buff *skb)
switch (id) {
case WMIX_HB_CHALLENGE_RESP_EVENTID:
ath6kl_dbg(ATH6KL_DBG_WMI, "wmi event hb challenge resp\n");
+ ath6kl_wmi_hb_challenge_resp_event(wmi, datap, len);
break;
case WMIX_DBGLOG_EVENTID:
ath6kl_dbg(ATH6KL_DBG_WMI, "wmi event dbglog len %d\n", len);
diff --git a/drivers/net/wireless/ath/ath6kl/wmi.h b/drivers/net/wireless/ath/ath6kl/wmi.h
index a791b1b..3d239b3 100644
--- a/drivers/net/wireless/ath/ath6kl/wmi.h
+++ b/drivers/net/wireless/ath/ath6kl/wmi.h
@@ -2714,6 +2714,8 @@ int ath6kl_wmi_set_inact_period(struct wmi *wmi, u8 if_idx, int inact_timeout);
void ath6kl_wmi_sscan_timer(unsigned long ptr);
+int ath6kl_wmi_get_challenge_resp_cmd(struct wmi *wmi, u32 cookie, u32 source);
+
struct ath6kl_vif *ath6kl_get_vif_by_index(struct ath6kl *ar, u8 if_idx);
void *ath6kl_wmi_init(struct ath6kl *devt);
void ath6kl_wmi_shutdown(struct wmi *wmi);
--
1.7.0.4
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH 4/4] ath6kl: Recover from "wmi ctrl ep is full" condition
2012-08-29 14:10 [PATCH 1/4] ath6kl: Refactor ath6kl_init_hw_start() and ath6kl_init_hw_stop() Vasanthakumar Thiagarajan
2012-08-29 14:10 ` [PATCH 2/4] ath6kl: Recover from fw crash Vasanthakumar Thiagarajan
2012-08-29 14:10 ` [PATCH 3/4] ath6kl: Add support to detect fw error through heart beat Vasanthakumar Thiagarajan
@ 2012-08-29 14:10 ` Vasanthakumar Thiagarajan
2012-08-30 9:27 ` [PATCH 1/4] ath6kl: Refactor ath6kl_init_hw_start() and ath6kl_init_hw_stop() Kalle Valo
3 siblings, 0 replies; 7+ messages in thread
From: Vasanthakumar Thiagarajan @ 2012-08-29 14:10 UTC (permalink / raw)
To: kvalo; +Cc: linux-wireless, ath6kl-devel
In some error conditions, fw pauses HTC pipes which would
result in control endpoint full condition. When we hit this
case, most of the time the device will be unusable. Re-initialize
the target to recover from this situation.
Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@qca.qualcomm.com>
---
drivers/net/wireless/ath/ath6kl/core.h | 1 +
drivers/net/wireless/ath/ath6kl/recovery.c | 2 ++
drivers/net/wireless/ath/ath6kl/txrx.c | 1 +
3 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/drivers/net/wireless/ath/ath6kl/core.h b/drivers/net/wireless/ath/ath6kl/core.h
index b2cbecf..ac90b31 100644
--- a/drivers/net/wireless/ath/ath6kl/core.h
+++ b/drivers/net/wireless/ath/ath6kl/core.h
@@ -660,6 +660,7 @@ enum ath6kl_state {
enum ath6kl_fw_err {
ATH6KL_FW_ASSERT,
ATH6KL_FW_HB_RESP_FAILURE,
+ ATH6KL_FW_EP_FULL,
};
struct ath6kl {
diff --git a/drivers/net/wireless/ath/ath6kl/recovery.c b/drivers/net/wireless/ath/ath6kl/recovery.c
index 9161d84..26e0816 100644
--- a/drivers/net/wireless/ath/ath6kl/recovery.c
+++ b/drivers/net/wireless/ath/ath6kl/recovery.c
@@ -30,6 +30,8 @@ static void ath6kl_recovery_work(struct work_struct *work)
ath6kl_init_hw_restart(ar);
ar->state = ATH6KL_STATE_ON;
+ clear_bit(WMI_CTRL_EP_FULL, &ar->flag);
+
ar->fw_recovery.err_reason = 0;
if (ar->fw_recovery.enable)
diff --git a/drivers/net/wireless/ath/ath6kl/txrx.c b/drivers/net/wireless/ath/ath6kl/txrx.c
index cbe1a9d..e867193 100644
--- a/drivers/net/wireless/ath/ath6kl/txrx.c
+++ b/drivers/net/wireless/ath/ath6kl/txrx.c
@@ -594,6 +594,7 @@ enum htc_send_full_action ath6kl_tx_queue_full(struct htc_target *target,
*/
set_bit(WMI_CTRL_EP_FULL, &ar->flag);
ath6kl_err("wmi ctrl ep is full\n");
+ ath6kl_recovery_err_notify(ar, ATH6KL_FW_EP_FULL);
return action;
}
--
1.7.0.4
^ permalink raw reply related [flat|nested] 7+ messages in thread* Re: [PATCH 1/4] ath6kl: Refactor ath6kl_init_hw_start() and ath6kl_init_hw_stop()
2012-08-29 14:10 [PATCH 1/4] ath6kl: Refactor ath6kl_init_hw_start() and ath6kl_init_hw_stop() Vasanthakumar Thiagarajan
` (2 preceding siblings ...)
2012-08-29 14:10 ` [PATCH 4/4] ath6kl: Recover from "wmi ctrl ep is full" condition Vasanthakumar Thiagarajan
@ 2012-08-30 9:27 ` Kalle Valo
3 siblings, 0 replies; 7+ messages in thread
From: Kalle Valo @ 2012-08-30 9:27 UTC (permalink / raw)
To: Vasanthakumar Thiagarajan; +Cc: linux-wireless, ath6kl-devel
On 08/29/2012 05:10 PM, Vasanthakumar Thiagarajan wrote:
> So that these functions will be used to re-initialize the fw
> upon detecting fw error. This refactoring moves ar->state
> setting out of core stop/start functionality.
>
> Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@qca.qualcomm.com>
Thanks, all four patches applied.
I had to fix one parenthesis alignment in patch 3, but that was easy to do.
Kalle
^ permalink raw reply [flat|nested] 7+ messages in thread