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wl1271: Add hardware recovery mechanism

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There is some probability of hardware failures, which currently go largely
undetected. Attempt to recover from these failures by shutting down the
hardware, and requesting mac80211 to reconfigure it.

Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Reviewed-by: Teemu Paasikivi <ext-teemu.3.paasikivi@nokia.com>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
This commit is contained in:
Juuso Oikarinen 2010-09-21 06:23:31 +02:00 committed by Luciano Coelho
parent 52a2a37550
commit 52b0e7a61f
4 changed files with 36 additions and 3 deletions
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3
drivers/net/wireless/wl12xx/wl1271.h
View file

@ -408,6 +408,9 @@ struct wl1271 {
/* The target interrupt mask */
struct work_struct irq_work;
/* Hardware recovery work */
struct work_struct recovery_work;
/* The mbox event mask */
u32 event_mask;

5
drivers/net/wireless/wl12xx/wl1271_cmd.c
View file

@ -94,6 +94,7 @@ int wl1271_cmd_send(struct wl1271 *wl, u16 id, void *buf, size_t len,
status = le16_to_cpu(cmd->status);
if (status != CMD_STATUS_SUCCESS) {
wl1271_error("command execute failure %d", status);
ieee80211_queue_work(wl->hw, &wl->recovery_work);
ret = -EIO;
}
@ -182,8 +183,10 @@ static int wl1271_cmd_wait_for_event(struct wl1271 *wl, u32 mask)
timeout = jiffies + msecs_to_jiffies(WL1271_EVENT_TIMEOUT);
do {
if (time_after(jiffies, timeout))
if (time_after(jiffies, timeout)) {
ieee80211_queue_work(wl->hw, &wl->recovery_work);
return -ETIMEDOUT;
}
msleep(1);

28
drivers/net/wireless/wl12xx/wl1271_main.c
View file

@ -235,6 +235,9 @@ static struct conf_drv_settings default_conf = {
}
};
static void __wl1271_op_remove_interface(struct wl1271 *wl);
static void wl1271_device_release(struct device *dev)
{
@ -612,6 +615,26 @@ static int wl1271_fetch_nvs(struct wl1271 *wl)
return ret;
}
static void wl1271_recovery_work(struct work_struct *work)
{
struct wl1271 *wl =
container_of(work, struct wl1271, recovery_work);
mutex_lock(&wl->mutex);
if (wl->state != WL1271_STATE_ON)
goto out;
wl1271_info("Hardware recovery in progress.");
/* reboot the chipset */
__wl1271_op_remove_interface(wl);
ieee80211_restart_hw(wl->hw);
out:
mutex_unlock(&wl->mutex);
}
static void wl1271_fw_wakeup(struct wl1271 *wl)
{
u32 elp_reg;
@ -635,6 +658,7 @@ static int wl1271_setup(struct wl1271 *wl)
INIT_WORK(&wl->irq_work, wl1271_irq_work);
INIT_WORK(&wl->tx_work, wl1271_tx_work);
INIT_WORK(&wl->scan_complete_work, wl1271_scan_complete_work);
INIT_WORK(&wl->recovery_work, wl1271_recovery_work);
return 0;
}
@ -793,11 +817,11 @@ int wl1271_plt_stop(struct wl1271 *wl)
mutex_unlock(&wl->mutex);
cancel_work_sync(&wl->irq_work);
cancel_work_sync(&wl->recovery_work);
return ret;
}
static int wl1271_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
{
struct wl1271 *wl = hw->priv;
@ -1046,6 +1070,8 @@ static void wl1271_op_remove_interface(struct ieee80211_hw *hw,
WARN_ON(wl->vif != vif);
__wl1271_op_remove_interface(wl);
mutex_unlock(&wl->mutex);
cancel_work_sync(&wl->recovery_work);
}
static void wl1271_configure_filters(struct wl1271 *wl, unsigned int filters)

3
drivers/net/wireless/wl12xx/wl1271_ps.c
View file

@ -64,7 +64,7 @@ void wl1271_ps_elp_sleep(struct wl1271 *wl)
test_bit(WL1271_FLAG_IDLE, &wl->flags)) {
cancel_delayed_work(&wl->elp_work);
ieee80211_queue_delayed_work(wl->hw, &wl->elp_work,
msecs_to_jiffies(ELP_ENTRY_DELAY));
msecs_to_jiffies(ELP_ENTRY_DELAY));
}
}
@ -99,6 +99,7 @@ int wl1271_ps_elp_wakeup(struct wl1271 *wl, bool chip_awake)
&compl, msecs_to_jiffies(WL1271_WAKEUP_TIMEOUT));
if (ret == 0) {
wl1271_error("ELP wakeup timeout!");
ieee80211_queue_work(wl->hw, &wl->recovery_work);
ret = -ETIMEDOUT;
goto err;
} else if (ret < 0) {