Merge tag 'master-2014-10-02' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next

John W. Linville says:

====================
pull request: wireless-next 2014-10-03

Please pull tihs batch of updates intended for the 3.18 stream!

For the iwlwifi bits, Emmanuel says:

"I have here a few things that depend on the latest mac80211's changes:
RRM, TPC, Quiet Period etc...  Eyal keeps improving our rate control
and we have a new device ID. This last patch should probably have
gone to wireless.git, but at that stage, I preferred to send it to
-next and CC stable."

For (most of) the Atheros bits, Kalle says:

"The only new feature is testmode support from me. Ben added a new method
to crash the firmware with an assert for debug purposes. As usual, we
have lots of smaller fixes from Michal. Matteo fixed a Kconfig
dependency with debugfs. I fixed some warnings recently added to
checkpatch."

For the NFC bits, Samuel says:

"We've had major updates for TI and ST Microelectronics drivers, and a
few NCI related changes.

For TI's trf7970a driver:

- Target mode support for trf7970a
- Suspend/resume support for trf7970a
- DT properties additions to handle different quirks
- A bunch of fixes for smartphone IOP related issues

For ST Microelectronics' ST21NFCA and ST21NFCB drivers:

- ISO15693 support for st21nfcb
- checkpatch and sparse related warning fixes
- Code cleanups and a few minor fixes

Finally, Marvell added ISO15693 support to the NCI stack, together with a
couple of NCI fixes."

For the Bluetooth bits, Johan says:

"This 3.18 pull request replaces the one I did on Monday ("bluetooth-next
2014-09-22", which hasn't been pulled yet). The additions since the last
request are:

 - SCO connection fix for devices not supporting eSCO
 - Cleanups regarding the SCO establishment logic
 - Remove unnecessary return value from logging functions
 - Header compression fix for 6lowpan
 - Cleanups to the ieee802154/mrf24j40 driver

Here's a copy from previous request that this one replaces:

'
Here are some more patches for 3.18. They include various fixes to the
btusb HCI driver, a fix for LE SMP, as well as adding Jukka to the
MAINTAINERS file for generic 6LoWPAN (as requested by Alexander Aring).

I've held on to this pull request a bit since we were waiting for a SCO
related fix to get sorted out first. However, since the merge window is
getting closer I decided not to wait for it. If we do get the fix sorted
out there'll probably be a second small pull request later this week.
'"

And,

"Unless 3.17 gets delayed this will probably be our last -next pull request for
3.18. We've got:

  - New Marvell hardware supportr
  - Multicast support for 6lowpan
  - Several of 6lowpan fixes & cleanups
  - Fix for a (false-positive) lockdep warning in L2CAP
  - Minor btusb cleanup"

On top of all that comes the usual sort of updates to ath5k, ath9k,
ath10k, brcmfmac, mwifiex, and wil6210.  This time around there are
also a number of rtlwifi updates to enable some new hardware and
to reconcile the in-kernel drivers with some newer releases of the
Realtek vendor drivers.  Also of note is some device tree work for
the bcma bus.

Please let me know if there are problems!
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 64 insertions, 8 deletions

diff --git a/drivers/net/wireless/ath/wil6210/main.c b/drivers/net/wireless/ath/wil6210/main.c
index 21667e0c3d14..6500caf8d609 100644
--- a/drivers/net/wireless/ath/wil6210/main.c
+++ b/drivers/net/wireless/ath/wil6210/main.c
@@ -25,14 +25,19 @@
 #define WAIT_FOR_DISCONNECT_TIMEOUT_MS 2000
 #define WAIT_FOR_DISCONNECT_INTERVAL_MS 10
 
-static bool no_fw_recovery;
+bool no_fw_recovery;
 module_param(no_fw_recovery, bool, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(no_fw_recovery, " disable FW error recovery");
+MODULE_PARM_DESC(no_fw_recovery, " disable automatic FW error recovery");
 
 static bool no_fw_load = true;
 module_param(no_fw_load, bool, S_IRUGO | S_IWUSR);
 MODULE_PARM_DESC(no_fw_load, " do not download FW, use one in on-card flash.");
 
+static unsigned int itr_trsh = WIL6210_ITR_TRSH_DEFAULT;
+
+module_param(itr_trsh, uint, S_IRUGO);
+MODULE_PARM_DESC(itr_trsh, " Interrupt moderation threshold, usecs.");
+
 #define RST_DELAY (20) /* msec, for loop in @wil_target_reset */
 #define RST_COUNT (1 + 1000/RST_DELAY) /* round up to be above 1 sec total */
 
@@ -186,17 +191,38 @@ static void wil_scan_timer_fn(ulong x)
 	schedule_work(&wil->fw_error_worker);
 }
 
+static int wil_wait_for_recovery(struct wil6210_priv *wil)
+{
+	if (wait_event_interruptible(wil->wq, wil->recovery_state !=
+				     fw_recovery_pending)) {
+		wil_err(wil, "Interrupt, canceling recovery\n");
+		return -ERESTARTSYS;
+	}
+	if (wil->recovery_state != fw_recovery_running) {
+		wil_info(wil, "Recovery cancelled\n");
+		return -EINTR;
+	}
+	wil_info(wil, "Proceed with recovery\n");
+	return 0;
+}
+
+void wil_set_recovery_state(struct wil6210_priv *wil, int state)
+{
+	wil_dbg_misc(wil, "%s(%d -> %d)\n", __func__,
+		     wil->recovery_state, state);
+
+	wil->recovery_state = state;
+	wake_up_interruptible(&wil->wq);
+}
+
 static void wil_fw_error_worker(struct work_struct *work)
 {
-	struct wil6210_priv *wil = container_of(work,
-			struct wil6210_priv, fw_error_worker);
+	struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
+						fw_error_worker);
 	struct wireless_dev *wdev = wil->wdev;
 
 	wil_dbg_misc(wil, "fw error worker\n");
 
-	if (no_fw_recovery)
-		return;
-
 	/* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
 	 * passed since last recovery attempt
 	 */
@@ -219,8 +245,13 @@ static void wil_fw_error_worker(struct work_struct *work)
 	case NL80211_IFTYPE_STATION:
 	case NL80211_IFTYPE_P2P_CLIENT:
 	case NL80211_IFTYPE_MONITOR:
-		wil_info(wil, "fw error recovery started (try %d)...\n",
+		wil_info(wil, "fw error recovery requested (try %d)...\n",
 			 wil->recovery_count);
+		if (!no_fw_recovery)
+			wil->recovery_state = fw_recovery_running;
+		if (0 != wil_wait_for_recovery(wil))
+			break;
+
 		__wil_down(wil);
 		__wil_up(wil);
 		break;
@@ -297,6 +328,7 @@ int wil_priv_init(struct wil6210_priv *wil)
 
 	INIT_LIST_HEAD(&wil->pending_wmi_ev);
 	spin_lock_init(&wil->wmi_ev_lock);
+	init_waitqueue_head(&wil->wq);
 
 	wil->wmi_wq = create_singlethread_workqueue(WIL_NAME"_wmi");
 	if (!wil->wmi_wq)
@@ -309,6 +341,7 @@ int wil_priv_init(struct wil6210_priv *wil)
 	}
 
 	wil->last_fw_recovery = jiffies;
+	wil->itr_trsh = itr_trsh;
 
 	return 0;
 }
@@ -325,6 +358,7 @@ void wil_priv_deinit(struct wil6210_priv *wil)
 {
 	wil_dbg_misc(wil, "%s()\n", __func__);
 
+	wil_set_recovery_state(wil, fw_recovery_idle);
 	del_timer_sync(&wil->scan_timer);
 	cancel_work_sync(&wil->disconnect_worker);
 	cancel_work_sync(&wil->fw_error_worker);
@@ -437,6 +471,26 @@ static int wil_target_reset(struct wil6210_priv *wil)
 	return 0;
 }
 
+/**
+ * wil_set_itr_trsh: - apply interrupt coalescing params
+ */
+void wil_set_itr_trsh(struct wil6210_priv *wil)
+{
+	/* disable, use usec resolution */
+	W(RGF_DMA_ITR_CNT_CRL, BIT_DMA_ITR_CNT_CRL_EXT_TICK);
+
+	/* disable interrupt moderation for monitor
+	 * to get better timestamp precision
+	 */
+	if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR)
+		return;
+
+	wil_info(wil, "set ITR_TRSH = %d usec\n", wil->itr_trsh);
+	W(RGF_DMA_ITR_CNT_TRSH, wil->itr_trsh);
+	W(RGF_DMA_ITR_CNT_CRL, BIT_DMA_ITR_CNT_CRL_EN |
+	  BIT_DMA_ITR_CNT_CRL_EXT_TICK); /* start it */
+}
+
 #undef R
 #undef W
 #undef S
@@ -547,6 +601,7 @@ int wil_reset(struct wil6210_priv *wil)
 void wil_fw_error_recovery(struct wil6210_priv *wil)
 {
 	wil_dbg_misc(wil, "starting fw error recovery\n");
+	wil->recovery_state = fw_recovery_pending;
 	schedule_work(&wil->fw_error_worker);
 }
 
@@ -698,6 +753,7 @@ int wil_down(struct wil6210_priv *wil)
 
 	wil_dbg_misc(wil, "%s()\n", __func__);
 
+	wil_set_recovery_state(wil, fw_recovery_idle);
 	mutex_lock(&wil->mutex);
 	rc = __wil_down(wil);
 	mutex_unlock(&wil->mutex);