Merge tag 'wireless-drivers-next-for-davem-2017-06-25' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next

Kalle Valo says:

====================
wireless-drivers-next patches for 4.13

New features and bug fixes to quite a few different drivers, but
nothing really special standing out.

What makes me happy that we have now more vendors actively
contributing to upstream drivers. In this pull request we have patches
from Broadcom, Intel, Qualcomm, Realtek and Redpine Signals, and I
still have patches from Marvell and Quantenna pending in patchwork. Now
that's something comparing to how things looked 11 years ago in Jeff
Garzik's "State of the Union: Wireless" email:

https://lkml.org/lkml/2006/1/5/671

Major changes:

wil6210

* add low level RF sector interface via nl80211 vendor commands

* add module parameter ftm_mode to load separate firmware for factory
  testing

* support devices with different PCIe bar size

* add support for PCIe D3hot in system suspend

* remove ioctl interface which should not be in a wireless driver

ath10k

* go back to using dma_alloc_coherent() for firmware scratch memory

* add per chain RSSI reporting

brcmfmac

* add support multi-scheduled scan

* add scheduled scan support for specified BSSIDs

* add support for brcm43430 revision 0

wlcore

* add wil1285 compatible

rsi

* add RS9113 USB support

iwlwifi

* FW API documentation improvements (for tools and htmldoc)

* continuing work for the new A000 family

* bump the maximum supported FW API to 31

* improve the differentiation between 8000, 9000 and A000 families
====================

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

1 files changed, 71 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/wil6210/txrx.c b/drivers/net/wireless/ath/wil6210/txrx.c
index 84d91606e6f3..ec57bcce9601 100644
--- a/drivers/net/wireless/ath/wil6210/txrx.c
+++ b/drivers/net/wireless/ath/wil6210/txrx.c
@@ -104,6 +104,51 @@ static inline int wil_vring_avail_high(struct vring *vring)
 	return wil_vring_avail_tx(vring) > wil_vring_wmark_high(vring);
 }
 
+/* returns true when all tx vrings are empty */
+bool wil_is_tx_idle(struct wil6210_priv *wil)
+{
+	int i;
+	unsigned long data_comp_to;
+
+	for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
+		struct vring *vring = &wil->vring_tx[i];
+		int vring_index = vring - wil->vring_tx;
+		struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index];
+
+		spin_lock(&txdata->lock);
+
+		if (!vring->va || !txdata->enabled) {
+			spin_unlock(&txdata->lock);
+			continue;
+		}
+
+		data_comp_to = jiffies + msecs_to_jiffies(
+					WIL_DATA_COMPLETION_TO_MS);
+		if (test_bit(wil_status_napi_en, wil->status)) {
+			while (!wil_vring_is_empty(vring)) {
+				if (time_after(jiffies, data_comp_to)) {
+					wil_dbg_pm(wil,
+						   "TO waiting for idle tx\n");
+					spin_unlock(&txdata->lock);
+					return false;
+				}
+				wil_dbg_ratelimited(wil,
+						    "tx vring is not empty -> NAPI\n");
+				spin_unlock(&txdata->lock);
+				napi_synchronize(&wil->napi_tx);
+				msleep(20);
+				spin_lock(&txdata->lock);
+				if (!vring->va || !txdata->enabled)
+					break;
+			}
+		}
+
+		spin_unlock(&txdata->lock);
+	}
+
+	return true;
+}
+
 /* wil_val_in_range - check if value in [min,max) */
 static inline bool wil_val_in_range(int val, int min, int max)
 {
@@ -406,6 +451,18 @@ static inline int wil_is_back_req(u8 fc)
 	       (IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ);
 }
 
+bool wil_is_rx_idle(struct wil6210_priv *wil)
+{
+	struct vring_rx_desc *_d;
+	struct vring *vring = &wil->vring_rx;
+
+	_d = (struct vring_rx_desc *)&vring->va[vring->swhead].rx;
+	if (_d->dma.status & RX_DMA_STATUS_DU)
+		return false;
+
+	return true;
+}
+
 /**
  * reap 1 frame from @swhead
  *
@@ -1812,6 +1869,15 @@ static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring,
 
 	spin_lock(&txdata->lock);
 
+	if (test_bit(wil_status_suspending, wil->status) ||
+	    test_bit(wil_status_suspended, wil->status) ||
+	    test_bit(wil_status_resuming, wil->status)) {
+		wil_dbg_txrx(wil,
+			     "suspend/resume in progress. drop packet\n");
+		spin_unlock(&txdata->lock);
+		return -EINVAL;
+	}
+
 	rc = (skb_is_gso(skb) ? __wil_tx_vring_tso : __wil_tx_vring)
 	     (wil, vring, skb);
 
@@ -1864,6 +1930,11 @@ static inline void __wil_update_net_queues(struct wil6210_priv *wil,
 		return;
 	}
 
+	/* Do not wake the queues in suspend flow */
+	if (test_bit(wil_status_suspending, wil->status) ||
+	    test_bit(wil_status_suspended, wil->status))
+		return;
+
 	/* check wake */
 	for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
 		struct vring *cur_vring = &wil->vring_tx[i];