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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-10-20 00:10:27 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-10-20 00:10:27 -0300
commitd0b2f91bede3bd5e3d24dd6803e56eee959c1797 (patch)
tree7fee4ab0509879c373c4f2cbd5b8a5be5b4041ee /drivers/net/wireless/ath/wil6210
parente914f8eb445e8f74b00303c19c2ffceaedd16a05 (diff)
Linux-libre 4.8.2-gnupck-4.8.2-gnu
Diffstat (limited to 'drivers/net/wireless/ath/wil6210')
-rw-r--r--drivers/net/wireless/ath/wil6210/cfg80211.c20
-rw-r--r--drivers/net/wireless/ath/wil6210/debug.c46
-rw-r--r--drivers/net/wireless/ath/wil6210/main.c12
-rw-r--r--drivers/net/wireless/ath/wil6210/p2p.c12
-rw-r--r--drivers/net/wireless/ath/wil6210/pcie_bus.c68
-rw-r--r--drivers/net/wireless/ath/wil6210/pm.c25
-rw-r--r--drivers/net/wireless/ath/wil6210/txrx.c42
-rw-r--r--drivers/net/wireless/ath/wil6210/wil6210.h6
-rw-r--r--drivers/net/wireless/ath/wil6210/wil_platform.h4
-rw-r--r--drivers/net/wireless/ath/wil6210/wmi.c8
10 files changed, 204 insertions, 39 deletions
diff --git a/drivers/net/wireless/ath/wil6210/cfg80211.c b/drivers/net/wireless/ath/wil6210/cfg80211.c
index 576981129..f0e1175fb 100644
--- a/drivers/net/wireless/ath/wil6210/cfg80211.c
+++ b/drivers/net/wireless/ath/wil6210/cfg80211.c
@@ -378,6 +378,10 @@ static int wil_cfg80211_scan(struct wiphy *wiphy,
/* social scan on P2P_DEVICE is handled as p2p search */
if (wdev->iftype == NL80211_IFTYPE_P2P_DEVICE &&
wil_p2p_is_social_scan(request)) {
+ if (!wil->p2p.p2p_dev_started) {
+ wil_err(wil, "P2P search requested on stopped P2P device\n");
+ return -EIO;
+ }
wil->scan_request = request;
wil->radio_wdev = wdev;
rc = wil_p2p_search(wil, request);
@@ -1351,6 +1355,7 @@ static int wil_cfg80211_start_p2p_device(struct wiphy *wiphy,
struct wil6210_priv *wil = wiphy_to_wil(wiphy);
wil_dbg_misc(wil, "%s: entered\n", __func__);
+ wil->p2p.p2p_dev_started = 1;
return 0;
}
@@ -1358,8 +1363,23 @@ static void wil_cfg80211_stop_p2p_device(struct wiphy *wiphy,
struct wireless_dev *wdev)
{
struct wil6210_priv *wil = wiphy_to_wil(wiphy);
+ u8 started;
wil_dbg_misc(wil, "%s: entered\n", __func__);
+ mutex_lock(&wil->mutex);
+ started = wil_p2p_stop_discovery(wil);
+ if (started && wil->scan_request) {
+ struct cfg80211_scan_info info = {
+ .aborted = true,
+ };
+
+ cfg80211_scan_done(wil->scan_request, &info);
+ wil->scan_request = NULL;
+ wil->radio_wdev = wil->wdev;
+ }
+ mutex_unlock(&wil->mutex);
+
+ wil->p2p.p2p_dev_started = 0;
}
static struct cfg80211_ops wil_cfg80211_ops = {
diff --git a/drivers/net/wireless/ath/wil6210/debug.c b/drivers/net/wireless/ath/wil6210/debug.c
index c312a667c..217a4591b 100644
--- a/drivers/net/wireless/ath/wil6210/debug.c
+++ b/drivers/net/wireless/ath/wil6210/debug.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2013 Qualcomm Atheros, Inc.
+ * Copyright (c) 2013,2016 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
@@ -19,34 +19,31 @@
void __wil_err(struct wil6210_priv *wil, const char *fmt, ...)
{
- struct net_device *ndev = wil_to_ndev(wil);
- struct va_format vaf = {
- .fmt = fmt,
- };
+ struct va_format vaf;
va_list args;
va_start(args, fmt);
+ vaf.fmt = fmt;
vaf.va = &args;
- netdev_err(ndev, "%pV", &vaf);
+ netdev_err(wil_to_ndev(wil), "%pV", &vaf);
trace_wil6210_log_err(&vaf);
va_end(args);
}
void __wil_err_ratelimited(struct wil6210_priv *wil, const char *fmt, ...)
{
- if (net_ratelimit()) {
- struct net_device *ndev = wil_to_ndev(wil);
- struct va_format vaf = {
- .fmt = fmt,
- };
- va_list args;
+ struct va_format vaf;
+ va_list args;
- va_start(args, fmt);
- vaf.va = &args;
- netdev_err(ndev, "%pV", &vaf);
- trace_wil6210_log_err(&vaf);
- va_end(args);
- }
+ if (!net_ratelimit())
+ return;
+
+ va_start(args, fmt);
+ vaf.fmt = fmt;
+ vaf.va = &args;
+ netdev_err(wil_to_ndev(wil), "%pV", &vaf);
+ trace_wil6210_log_err(&vaf);
+ va_end(args);
}
void wil_dbg_ratelimited(const struct wil6210_priv *wil, const char *fmt, ...)
@@ -67,27 +64,24 @@ void wil_dbg_ratelimited(const struct wil6210_priv *wil, const char *fmt, ...)
void __wil_info(struct wil6210_priv *wil, const char *fmt, ...)
{
- struct net_device *ndev = wil_to_ndev(wil);
- struct va_format vaf = {
- .fmt = fmt,
- };
+ struct va_format vaf;
va_list args;
va_start(args, fmt);
+ vaf.fmt = fmt;
vaf.va = &args;
- netdev_info(ndev, "%pV", &vaf);
+ netdev_info(wil_to_ndev(wil), "%pV", &vaf);
trace_wil6210_log_info(&vaf);
va_end(args);
}
void wil_dbg_trace(struct wil6210_priv *wil, const char *fmt, ...)
{
- struct va_format vaf = {
- .fmt = fmt,
- };
+ struct va_format vaf;
va_list args;
va_start(args, fmt);
+ vaf.fmt = fmt;
vaf.va = &args;
trace_wil6210_log_dbg(&vaf);
va_end(args);
diff --git a/drivers/net/wireless/ath/wil6210/main.c b/drivers/net/wireless/ath/wil6210/main.c
index 8e31d755b..4bc92e549 100644
--- a/drivers/net/wireless/ath/wil6210/main.c
+++ b/drivers/net/wireless/ath/wil6210/main.c
@@ -850,10 +850,14 @@ int wil_reset(struct wil6210_priv *wil, bool load_fw)
mutex_unlock(&wil->wmi_mutex);
if (wil->scan_request) {
+ struct cfg80211_scan_info info = {
+ .aborted = true,
+ };
+
wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
wil->scan_request);
del_timer_sync(&wil->scan_timer);
- cfg80211_scan_done(wil->scan_request, true);
+ cfg80211_scan_done(wil->scan_request, &info);
wil->scan_request = NULL;
}
@@ -1049,10 +1053,14 @@ int __wil_down(struct wil6210_priv *wil)
(void)wil_p2p_stop_discovery(wil);
if (wil->scan_request) {
+ struct cfg80211_scan_info info = {
+ .aborted = true,
+ };
+
wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
wil->scan_request);
del_timer_sync(&wil->scan_timer);
- cfg80211_scan_done(wil->scan_request, true);
+ cfg80211_scan_done(wil->scan_request, &info);
wil->scan_request = NULL;
}
diff --git a/drivers/net/wireless/ath/wil6210/p2p.c b/drivers/net/wireless/ath/wil6210/p2p.c
index 1c9153894..e0f8aa0eb 100644
--- a/drivers/net/wireless/ath/wil6210/p2p.c
+++ b/drivers/net/wireless/ath/wil6210/p2p.c
@@ -114,8 +114,10 @@ int wil_p2p_listen(struct wil6210_priv *wil, unsigned int duration,
u8 channel = P2P_DMG_SOCIAL_CHANNEL;
int rc;
- if (chan)
- channel = chan->hw_value;
+ if (!chan)
+ return -EINVAL;
+
+ channel = chan->hw_value;
wil_dbg_misc(wil, "%s: duration %d\n", __func__, duration);
@@ -250,8 +252,12 @@ void wil_p2p_search_expired(struct work_struct *work)
mutex_unlock(&wil->mutex);
if (started) {
+ struct cfg80211_scan_info info = {
+ .aborted = false,
+ };
+
mutex_lock(&wil->p2p_wdev_mutex);
- cfg80211_scan_done(wil->scan_request, 0);
+ cfg80211_scan_done(wil->scan_request, &info);
wil->scan_request = NULL;
wil->radio_wdev = wil->wdev;
mutex_unlock(&wil->p2p_wdev_mutex);
diff --git a/drivers/net/wireless/ath/wil6210/pcie_bus.c b/drivers/net/wireless/ath/wil6210/pcie_bus.c
index aeb72c438..7b5c4222b 100644
--- a/drivers/net/wireless/ath/wil6210/pcie_bus.c
+++ b/drivers/net/wireless/ath/wil6210/pcie_bus.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2012-2015 Qualcomm Atheros, Inc.
+ * Copyright (c) 2012-2016 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
@@ -18,13 +18,20 @@
#include <linux/pci.h>
#include <linux/moduleparam.h>
#include <linux/interrupt.h>
-
+#include <linux/suspend.h>
#include "wil6210.h"
static bool use_msi = true;
module_param(use_msi, bool, S_IRUGO);
MODULE_PARM_DESC(use_msi, " Use MSI interrupt, default - true");
+#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
+static int wil6210_pm_notify(struct notifier_block *notify_block,
+ unsigned long mode, void *unused);
+#endif /* CONFIG_PM_SLEEP */
+#endif /* CONFIG_PM */
+
static
void wil_set_capabilities(struct wil6210_priv *wil)
{
@@ -238,6 +245,18 @@ static int wil_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
goto bus_disable;
}
+#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
+ wil->pm_notify.notifier_call = wil6210_pm_notify;
+ rc = register_pm_notifier(&wil->pm_notify);
+ if (rc)
+ /* Do not fail the driver initialization, as suspend can
+ * be prevented in a later phase if needed
+ */
+ wil_err(wil, "register_pm_notifier failed: %d\n", rc);
+#endif /* CONFIG_PM_SLEEP */
+#endif /* CONFIG_PM */
+
wil6210_debugfs_init(wil);
@@ -267,6 +286,12 @@ static void wil_pcie_remove(struct pci_dev *pdev)
wil_dbg_misc(wil, "%s()\n", __func__);
+#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
+ unregister_pm_notifier(&wil->pm_notify);
+#endif /* CONFIG_PM_SLEEP */
+#endif /* CONFIG_PM */
+
wil6210_debugfs_remove(wil);
wil_if_remove(wil);
wil_if_pcie_disable(wil);
@@ -335,6 +360,45 @@ static int wil6210_resume(struct device *dev, bool is_runtime)
return rc;
}
+static int wil6210_pm_notify(struct notifier_block *notify_block,
+ unsigned long mode, void *unused)
+{
+ struct wil6210_priv *wil = container_of(
+ notify_block, struct wil6210_priv, pm_notify);
+ int rc = 0;
+ enum wil_platform_event evt;
+
+ wil_dbg_pm(wil, "%s: mode (%ld)\n", __func__, mode);
+
+ switch (mode) {
+ case PM_HIBERNATION_PREPARE:
+ case PM_SUSPEND_PREPARE:
+ case PM_RESTORE_PREPARE:
+ rc = wil_can_suspend(wil, false);
+ if (rc)
+ break;
+ evt = WIL_PLATFORM_EVT_PRE_SUSPEND;
+ if (wil->platform_ops.notify)
+ rc = wil->platform_ops.notify(wil->platform_handle,
+ evt);
+ break;
+ case PM_POST_SUSPEND:
+ case PM_POST_HIBERNATION:
+ case PM_POST_RESTORE:
+ evt = WIL_PLATFORM_EVT_POST_SUSPEND;
+ if (wil->platform_ops.notify)
+ rc = wil->platform_ops.notify(wil->platform_handle,
+ evt);
+ break;
+ default:
+ wil_dbg_pm(wil, "unhandled notify mode %ld\n", mode);
+ break;
+ }
+
+ wil_dbg_pm(wil, "notification mode %ld: rc (%d)\n", mode, rc);
+ return rc;
+}
+
static int wil6210_pm_suspend(struct device *dev)
{
return wil6210_suspend(dev, false);
diff --git a/drivers/net/wireless/ath/wil6210/pm.c b/drivers/net/wireless/ath/wil6210/pm.c
index 0b7ecbcac..11ee24d50 100644
--- a/drivers/net/wireless/ath/wil6210/pm.c
+++ b/drivers/net/wireless/ath/wil6210/pm.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2014 Qualcomm Atheros, Inc.
+ * Copyright (c) 2014,2016 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
@@ -24,10 +24,32 @@ int wil_can_suspend(struct wil6210_priv *wil, bool is_runtime)
wil_dbg_pm(wil, "%s(%s)\n", __func__,
is_runtime ? "runtime" : "system");
+ if (!netif_running(wil_to_ndev(wil))) {
+ /* can always sleep when down */
+ wil_dbg_pm(wil, "Interface is down\n");
+ goto out;
+ }
+ if (test_bit(wil_status_resetting, wil->status)) {
+ wil_dbg_pm(wil, "Delay suspend when resetting\n");
+ rc = -EBUSY;
+ goto out;
+ }
+ if (wil->recovery_state != fw_recovery_idle) {
+ wil_dbg_pm(wil, "Delay suspend during recovery\n");
+ rc = -EBUSY;
+ goto out;
+ }
+
+ /* interface is running */
switch (wdev->iftype) {
case NL80211_IFTYPE_MONITOR:
case NL80211_IFTYPE_STATION:
case NL80211_IFTYPE_P2P_CLIENT:
+ if (test_bit(wil_status_fwconnecting, wil->status)) {
+ wil_dbg_pm(wil, "Delay suspend when connecting\n");
+ rc = -EBUSY;
+ goto out;
+ }
break;
/* AP-like interface - can't suspend */
default:
@@ -36,6 +58,7 @@ int wil_can_suspend(struct wil6210_priv *wil, bool is_runtime)
break;
}
+out:
wil_dbg_pm(wil, "%s(%s) => %s (%d)\n", __func__,
is_runtime ? "runtime" : "system", rc ? "No" : "Yes", rc);
diff --git a/drivers/net/wireless/ath/wil6210/txrx.c b/drivers/net/wireless/ath/wil6210/txrx.c
index a4e43796a..f2f6a404d 100644
--- a/drivers/net/wireless/ath/wil6210/txrx.c
+++ b/drivers/net/wireless/ath/wil6210/txrx.c
@@ -184,6 +184,13 @@ static void wil_vring_free(struct wil6210_priv *wil, struct vring *vring,
&vring->va[vring->swtail].tx;
ctx = &vring->ctx[vring->swtail];
+ if (!ctx) {
+ wil_dbg_txrx(wil,
+ "ctx(%d) was already completed\n",
+ vring->swtail);
+ vring->swtail = wil_vring_next_tail(vring);
+ continue;
+ }
*d = *_d;
wil_txdesc_unmap(dev, d, ctx);
if (ctx->skb)
@@ -544,6 +551,12 @@ static int wil_rx_refill(struct wil6210_priv *wil, int count)
break;
}
}
+
+ /* make sure all writes to descriptors (shared memory) are done before
+ * committing them to HW
+ */
+ wmb();
+
wil_w(wil, v->hwtail, v->swtail);
return rc;
@@ -969,6 +982,13 @@ void wil_vring_fini_tx(struct wil6210_priv *wil, int id)
txdata->dot1x_open = false;
txdata->enabled = 0; /* no Tx can be in progress or start anew */
spin_unlock_bh(&txdata->lock);
+ /* napi_synchronize waits for completion of the current NAPI but will
+ * not prevent the next NAPI run.
+ * Add a memory barrier to guarantee that txdata->enabled is zeroed
+ * before napi_synchronize so that the next scheduled NAPI will not
+ * handle this vring
+ */
+ wmb();
/* make sure NAPI won't touch this vring */
if (test_bit(wil_status_napi_en, wil->status))
napi_synchronize(&wil->napi_tx);
@@ -1551,6 +1571,13 @@ static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct vring *vring,
vring_index, used, used + descs_used);
}
+ /* Make sure to advance the head only after descriptor update is done.
+ * This will prevent a race condition where the completion thread
+ * will see the DU bit set from previous run and will handle the
+ * skb before it was completed.
+ */
+ wmb();
+
/* advance swhead */
wil_vring_advance_head(vring, descs_used);
wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead);
@@ -1567,7 +1594,7 @@ mem_error:
while (descs_used > 0) {
struct wil_ctx *ctx;
- i = (swhead + descs_used) % vring->size;
+ i = (swhead + descs_used - 1) % vring->size;
d = (struct vring_tx_desc *)&vring->va[i].tx;
_desc = &vring->va[i].tx;
*d = *_desc;
@@ -1691,6 +1718,13 @@ static int __wil_tx_vring(struct wil6210_priv *wil, struct vring *vring,
vring_index, used, used + nr_frags + 1);
}
+ /* Make sure to advance the head only after descriptor update is done.
+ * This will prevent a race condition where the completion thread
+ * will see the DU bit set from previous run and will handle the
+ * skb before it was completed.
+ */
+ wmb();
+
/* advance swhead */
wil_vring_advance_head(vring, nr_frags + 1);
wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", vring_index, swhead,
@@ -1914,6 +1948,12 @@ int wil_tx_complete(struct wil6210_priv *wil, int ringid)
wil_consume_skb(skb, d->dma.error == 0);
}
memset(ctx, 0, sizeof(*ctx));
+ /* Make sure the ctx is zeroed before updating the tail
+ * to prevent a case where wil_tx_vring will see
+ * this descriptor as used and handle it before ctx zero
+ * is completed.
+ */
+ wmb();
/* There is no need to touch HW descriptor:
* - ststus bit TX_DMA_STATUS_DU is set by design,
* so hardware will not try to process this desc.,
diff --git a/drivers/net/wireless/ath/wil6210/wil6210.h b/drivers/net/wireless/ath/wil6210/wil6210.h
index 1abdd45c3..98d302935 100644
--- a/drivers/net/wireless/ath/wil6210/wil6210.h
+++ b/drivers/net/wireless/ath/wil6210/wil6210.h
@@ -458,6 +458,7 @@ struct wil_tid_crypto_rx {
struct wil_p2p_info {
struct ieee80211_channel listen_chan;
u8 discovery_started;
+ u8 p2p_dev_started;
u64 cookie;
struct timer_list discovery_timer; /* listen/search duration */
struct work_struct discovery_expired_work; /* listen/search expire */
@@ -662,6 +663,11 @@ struct wil6210_priv {
/* High Access Latency Policy voting */
struct wil_halp halp;
+#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
+ struct notifier_block pm_notify;
+#endif /* CONFIG_PM_SLEEP */
+#endif /* CONFIG_PM */
};
#define wil_to_wiphy(i) (i->wdev->wiphy)
diff --git a/drivers/net/wireless/ath/wil6210/wil_platform.h b/drivers/net/wireless/ath/wil6210/wil_platform.h
index 33d4a34b3..f8c41172a 100644
--- a/drivers/net/wireless/ath/wil6210/wil_platform.h
+++ b/drivers/net/wireless/ath/wil6210/wil_platform.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2014-2015 Qualcomm Atheros, Inc.
+ * Copyright (c) 2014-2016 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
@@ -23,6 +23,8 @@ enum wil_platform_event {
WIL_PLATFORM_EVT_FW_CRASH = 0,
WIL_PLATFORM_EVT_PRE_RESET = 1,
WIL_PLATFORM_EVT_FW_RDY = 2,
+ WIL_PLATFORM_EVT_PRE_SUSPEND = 3,
+ WIL_PLATFORM_EVT_POST_SUSPEND = 4,
};
/**
diff --git a/drivers/net/wireless/ath/wil6210/wmi.c b/drivers/net/wireless/ath/wil6210/wmi.c
index b80c5d850..4d9254191 100644
--- a/drivers/net/wireless/ath/wil6210/wmi.c
+++ b/drivers/net/wireless/ath/wil6210/wmi.c
@@ -426,15 +426,17 @@ static void wmi_evt_scan_complete(struct wil6210_priv *wil, int id,
{
if (wil->scan_request) {
struct wmi_scan_complete_event *data = d;
- bool aborted = (data->status != WMI_SCAN_SUCCESS);
+ struct cfg80211_scan_info info = {
+ .aborted = (data->status != WMI_SCAN_SUCCESS),
+ };
wil_dbg_wmi(wil, "SCAN_COMPLETE(0x%08x)\n", data->status);
wil_dbg_misc(wil, "Complete scan_request 0x%p aborted %d\n",
- wil->scan_request, aborted);
+ wil->scan_request, info.aborted);
del_timer_sync(&wil->scan_timer);
mutex_lock(&wil->p2p_wdev_mutex);
- cfg80211_scan_done(wil->scan_request, aborted);
+ cfg80211_scan_done(wil->scan_request, &info);
wil->radio_wdev = wil->wdev;
mutex_unlock(&wil->p2p_wdev_mutex);
wil->scan_request = NULL;