From: Wey-Yi Guy <wey-yi.w.guy@xxxxxxxxx>
Provide the function to perform different type of uCode reset/reload operation.
When uCode detect error and can not fix itself, this iwl_force_reset()
function allow driver to perform the necessary reset/reload functions and help
to bring uCode back to normal operation state.
Currently only 2 type of force reset are available:
- reset radio
- reload firmware
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@xxxxxxxxx>
Signed-off-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>
---
drivers/net/wireless/iwlwifi/iwl-core.c | 44 +++++++++++++++++++++++++++++-
drivers/net/wireless/iwlwifi/iwl-core.h | 2 +-
drivers/net/wireless/iwlwifi/iwl-dev.h | 9 +++++-
drivers/net/wireless/iwlwifi/iwl-rx.c | 2 +-
drivers/net/wireless/iwlwifi/iwl-scan.c | 10 -------
5 files changed, 52 insertions(+), 15 deletions(-)
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c
index d390eef..500ced4 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.c
+++ b/drivers/net/wireless/iwlwifi/iwl-core.c
@@ -3334,7 +3334,7 @@ int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
}
EXPORT_SYMBOL(iwl_dump_fh);
-void iwl_force_rf_reset(struct iwl_priv *priv)
+static void iwl_force_rf_reset(struct iwl_priv *priv)
{
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
@@ -3356,7 +3356,47 @@ void iwl_force_rf_reset(struct iwl_priv *priv)
iwl_internal_short_hw_scan(priv);
return;
}
-EXPORT_SYMBOL(iwl_force_rf_reset);
+
+#define IWL_DELAY_NEXT_FORCE_RESET (HZ*3)
+
+int iwl_force_reset(struct iwl_priv *priv, int mode)
+{
+ if (test_bit(STATUS_EXIT_PENDING, &priv->status))
+ return -EINVAL;
+
+ if (priv->last_force_reset_jiffies &&
+ time_after(priv->last_force_reset_jiffies +
+ IWL_DELAY_NEXT_FORCE_RESET, jiffies)) {
+ IWL_DEBUG_INFO(priv, "force reset rejected\n");
+ return -EAGAIN;
+ }
+
+ IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
+
+ switch (mode) {
+ case IWL_RF_RESET:
+ iwl_force_rf_reset(priv);
+ break;
+ case IWL_FW_RESET:
+ IWL_ERR(priv, "On demand firmware reload\n");
+ /* Set the FW error flag -- cleared on iwl_down */
+ set_bit(STATUS_FW_ERROR, &priv->status);
+ wake_up_interruptible(&priv->wait_command_queue);
+ /*
+ * Keep the restart process from trying to send host
+ * commands by clearing the INIT status bit
+ */
+ clear_bit(STATUS_READY, &priv->status);
+ queue_work(priv->workqueue, &priv->restart);
+ break;
+ default:
+ IWL_DEBUG_INFO(priv, "invalid reset request.\n");
+ return -EINVAL;
+ }
+ priv->last_force_reset_jiffies = jiffies;
+
+ return 0;
+}
#ifdef CONFIG_PM
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.h b/drivers/net/wireless/iwlwifi/iwl-core.h
index 8f0c564..df55879 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.h
+++ b/drivers/net/wireless/iwlwifi/iwl-core.h
@@ -501,7 +501,7 @@ int iwl_scan_cancel(struct iwl_priv *priv);
int iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms);
int iwl_mac_hw_scan(struct ieee80211_hw *hw, struct cfg80211_scan_request *req);
int iwl_internal_short_hw_scan(struct iwl_priv *priv);
-void iwl_force_rf_reset(struct iwl_priv *priv);
+int iwl_force_reset(struct iwl_priv *priv, int mode);
u16 iwl_fill_probe_req(struct iwl_priv *priv, struct ieee80211_mgmt *frame,
const u8 *ie, int ie_len, int left);
void iwl_setup_rx_scan_handlers(struct iwl_priv *priv);
diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h
index 55dc5a8..9f1d302 100644
--- a/drivers/net/wireless/iwlwifi/iwl-dev.h
+++ b/drivers/net/wireless/iwlwifi/iwl-dev.h
@@ -1035,6 +1035,11 @@ struct iwl_event_log {
#define IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF (100)
#define IWL_MAX_PLCP_ERR_THRESHOLD_MAX (255)
+enum iwl_reset {
+ IWL_RF_RESET = 0,
+ IWL_FW_RESET,
+};
+
struct iwl_priv {
/* ieee device used by generic ieee processing code */
@@ -1066,6 +1071,9 @@ struct iwl_priv {
/* storing the jiffies when the plcp error rate is received */
unsigned long plcp_jiffies;
+ /* force reset */
+ unsigned long last_force_reset_jiffies;
+
/* we allocate array of iwl4965_channel_info for NIC's valid channels.
* Access via channel # using indirect index array */
struct iwl_channel_info *channel_info; /* channel info array */
@@ -1087,7 +1095,6 @@ struct iwl_priv {
unsigned long scan_start;
unsigned long scan_pass_start;
unsigned long scan_start_tsf;
- unsigned long last_internal_scan_jiffies;
void *scan;
int scan_bands;
struct cfg80211_scan_request *scan_request;
diff --git a/drivers/net/wireless/iwlwifi/iwl-rx.c b/drivers/net/wireless/iwlwifi/iwl-rx.c
index 5df6638..909d9c9 100644
--- a/drivers/net/wireless/iwlwifi/iwl-rx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-rx.c
@@ -689,7 +689,7 @@ void iwl_rx_statistics(struct iwl_priv *priv,
* Reset the RF radio due to the high plcp
* error rate
*/
- iwl_force_rf_reset(priv);
+ iwl_force_reset(priv, IWL_RF_RESET);
}
}
diff --git a/drivers/net/wireless/iwlwifi/iwl-scan.c b/drivers/net/wireless/iwlwifi/iwl-scan.c
index f786a40..5014774 100644
--- a/drivers/net/wireless/iwlwifi/iwl-scan.c
+++ b/drivers/net/wireless/iwlwifi/iwl-scan.c
@@ -250,8 +250,6 @@ static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
if (!priv->is_internal_short_scan)
priv->next_scan_jiffies = 0;
- else
- priv->last_internal_scan_jiffies = jiffies;
IWL_DEBUG_INFO(priv, "Setting scan to off\n");
@@ -551,8 +549,6 @@ EXPORT_SYMBOL(iwl_mac_hw_scan);
* internal short scan, this function should only been called while associated.
* It will reset and tune the radio to prevent possible RF related problem
*/
-#define IWL_DELAY_NEXT_INTERNAL_SCAN (HZ*1)
-
int iwl_internal_short_hw_scan(struct iwl_priv *priv)
{
int ret = 0;
@@ -572,12 +568,6 @@ int iwl_internal_short_hw_scan(struct iwl_priv *priv)
ret = -EAGAIN;
goto out;
}
- if (priv->last_internal_scan_jiffies &&
- time_after(priv->last_internal_scan_jiffies +
- IWL_DELAY_NEXT_INTERNAL_SCAN, jiffies)) {
- IWL_DEBUG_SCAN(priv, "internal scan rejected\n");
- goto out;
- }
priv->scan_bands = 0;
if (priv->band == IEEE80211_BAND_5GHZ)
--
1.6.3.3
--
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