From: Michal Kazior <michal.kazior@tieto.com>
To: ath10k@lists.infradead.org
Cc: linux-wireless@vger.kernel.org, Michal Kazior <michal.kazior@tieto.com>
Subject: [PATCH v2 5/7] ath10k: rework tx queue locking
Date: Fri, 30 Jan 2015 13:31:24 +0100 [thread overview]
Message-ID: <1422621086-28970-6-git-send-email-michal.kazior@tieto.com> (raw)
In-Reply-To: <1422621086-28970-1-git-send-email-michal.kazior@tieto.com>
Tx queue locking was very simple until now.
Multi-channel support will require a more flexible
and fine grained control.
This introduces a per-hw and per-vif (each with a
bitmask of reasons) tx queue locking.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
---
drivers/net/wireless/ath/ath10k/core.h | 8 +++++
drivers/net/wireless/ath/ath10k/htt_tx.c | 11 ++++--
drivers/net/wireless/ath/ath10k/mac.c | 20 ++++++++++-
drivers/net/wireless/ath/ath10k/mac.h | 57 ++++++++++++++++++++++++++++++++
4 files changed, 92 insertions(+), 4 deletions(-)
diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index cf7963d..68df646 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -280,6 +280,7 @@ struct ath10k_vif {
bool beacon_sent;
void *beacon_buf;
dma_addr_t beacon_paddr;
+ unsigned long tx_paused; /* arbitrary values defined by target */
struct ath10k *ar;
struct ath10k_chanctx *arctx;
@@ -472,6 +473,11 @@ static inline const char *ath10k_scan_state_str(enum ath10k_scan_state state)
return "unknown";
}
+enum ath10k_tx_pause_reason {
+ ATH10K_TX_PAUSE_Q_FULL,
+ ATH10K_TX_PAUSE_MAX,
+};
+
struct ath10k {
struct ath_common ath_common;
struct ieee80211_hw *hw;
@@ -631,6 +637,8 @@ struct ath10k {
struct dfs_pattern_detector *dfs_detector;
+ unsigned long tx_paused; /* see ATH10K_TX_PAUSE_ */
+
#ifdef CONFIG_ATH10K_DEBUGFS
struct ath10k_debug debug;
#endif
diff --git a/drivers/net/wireless/ath/ath10k/htt_tx.c b/drivers/net/wireless/ath/ath10k/htt_tx.c
index c1961e7..fcc52c1 100644
--- a/drivers/net/wireless/ath/ath10k/htt_tx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_tx.c
@@ -24,9 +24,14 @@
void __ath10k_htt_tx_dec_pending(struct ath10k_htt *htt)
{
+ struct ath10k *ar = htt->ar;
+
htt->num_pending_tx--;
- if (htt->num_pending_tx == htt->max_num_pending_tx - 1)
- ieee80211_wake_queues(htt->ar->hw);
+ if (htt->num_pending_tx == htt->max_num_pending_tx - 1) {
+ spin_lock_bh(&ar->data_lock);
+ ath10k_mac_tx_unlock(htt->ar, ATH10K_TX_PAUSE_Q_FULL);
+ spin_unlock_bh(&ar->data_lock);
+ }
}
static void ath10k_htt_tx_dec_pending(struct ath10k_htt *htt)
@@ -49,7 +54,7 @@ static int ath10k_htt_tx_inc_pending(struct ath10k_htt *htt)
htt->num_pending_tx++;
if (htt->num_pending_tx == htt->max_num_pending_tx)
- ieee80211_stop_queues(htt->ar->hw);
+ ath10k_mac_tx_lock(htt->ar, ATH10K_TX_PAUSE_Q_FULL);
exit:
spin_unlock_bh(&htt->tx_lock);
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index ba66a67..92355f1 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -2811,6 +2811,7 @@ void ath10k_halt(struct ath10k *ar)
ath10k_monitor_stop(ar);
ar->monitor_started = false;
+ ar->tx_paused = 0;
ath10k_scan_finish(ar);
ath10k_peer_cleanup_all(ar);
@@ -3233,6 +3234,7 @@ static int ath10k_add_interface(struct ieee80211_hw *hw,
int ret = 0;
u32 value;
int bit;
+ int i;
u32 vdev_param;
vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
@@ -3288,6 +3290,15 @@ static int ath10k_add_interface(struct ieee80211_hw *hw,
break;
}
+ /* Using vdev_id as queue number will make it very easy to do per-vif
+ * tx queue locking. This shouldn't wrap due to interface combinations
+ * but do a modulo for correctness sake and prevent using offchannel tx
+ * queues for regular vif tx.
+ */
+ vif->cab_queue = arvif->vdev_id % (IEEE80211_MAX_QUEUES - 1);
+ for (i = 0; i < ARRAY_SIZE(vif->hw_queue); i++)
+ vif->hw_queue[i] = arvif->vdev_id % (IEEE80211_MAX_QUEUES - 1);
+
/* Some firmware revisions don't wait for beacon tx completion before
* sending another SWBA event. This could lead to hardware using old
* (freed) beacon data in some cases, e.g. tx credit starvation
@@ -5785,6 +5796,7 @@ int ath10k_mac_register(struct ath10k *ar)
IEEE80211_HW_HAS_RATE_CONTROL |
IEEE80211_HW_AP_LINK_PS |
IEEE80211_HW_WANT_MONITOR_VIF |
+ IEEE80211_HW_QUEUE_CONTROL |
IEEE80211_HW_SPECTRUM_MGMT;
ar->hw->wiphy->features |= NL80211_FEATURE_STATIC_SMPS;
@@ -5830,7 +5842,13 @@ int ath10k_mac_register(struct ath10k *ar)
* on LL hardware queues are managed entirely by the FW
* so we only advertise to mac we can do the queues thing
*/
- ar->hw->queues = 4;
+ ar->hw->queues = IEEE80211_MAX_QUEUES;
+
+ /* vdev_ids are used as hw queue numbers. Make sure offchan tx queue is
+ * something that vdev_ids can't reach so that we don't stop the queue
+ * accidentally.
+ */
+ ar->hw->offchannel_tx_hw_queue = IEEE80211_MAX_QUEUES - 1;
switch (ar->wmi.op_version) {
case ATH10K_FW_WMI_OP_VERSION_MAIN:
diff --git a/drivers/net/wireless/ath/ath10k/mac.h b/drivers/net/wireless/ath/ath10k/mac.h
index 6829611..76776f6 100644
--- a/drivers/net/wireless/ath/ath10k/mac.h
+++ b/drivers/net/wireless/ath/ath10k/mac.h
@@ -69,4 +69,61 @@ static inline void ath10k_tx_h_seq_no(struct ieee80211_vif *vif,
}
}
+static inline void ath10k_mac_tx_lock(struct ath10k *ar, int reason)
+{
+ lockdep_assert_held(&ar->htt.tx_lock);
+
+ WARN_ON(reason >= ATH10K_TX_PAUSE_MAX);
+ ar->tx_paused |= BIT(reason);
+ ieee80211_stop_queues(ar->hw);
+}
+
+static inline void ath10k_mac_tx_unlock(struct ath10k *ar, int reason)
+{
+ struct ath10k_vif *arvif;
+
+ lockdep_assert_held(&ar->htt.tx_lock);
+ lockdep_assert_held(&ar->data_lock);
+
+ WARN_ON(reason >= ATH10K_TX_PAUSE_MAX);
+ ar->tx_paused &= ~BIT(reason);
+
+ if (ar->tx_paused)
+ return;
+
+ list_for_each_entry(arvif, &ar->arvifs, list)
+ if (!arvif->tx_paused)
+ ieee80211_wake_queue(ar->hw, arvif->vdev_id);
+}
+
+static inline void ath10k_mac_vif_tx_lock(struct ath10k_vif *arvif, int reason)
+{
+ struct ath10k *ar = arvif->ar;
+
+ lockdep_assert_held(&ar->htt.tx_lock);
+
+ WARN_ON(reason >= BITS_PER_LONG);
+ arvif->tx_paused |= BIT(reason);
+ ieee80211_stop_queue(ar->hw, arvif->vdev_id);
+}
+
+static inline void ath10k_mac_vif_tx_unlock(struct ath10k_vif *arvif,
+ int reason)
+{
+ struct ath10k *ar = arvif->ar;
+
+ lockdep_assert_held(&ar->htt.tx_lock);
+
+ WARN_ON(reason >= BITS_PER_LONG);
+ arvif->tx_paused &= ~BIT(reason);
+
+ if (ar->tx_paused)
+ return;
+
+ if (arvif->tx_paused)
+ return;
+
+ ieee80211_wake_queue(ar->hw, arvif->vdev_id);
+}
+
#endif /* _MAC_H_ */
--
1.8.5.3
next prev parent reply other threads:[~2015-01-30 12:33 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-30 8:41 [PATCH 0/7] ath10k: add multi-channel support Michal Kazior
2015-01-30 8:41 ` [PATCH 1/7] ath10k: allow empty ssid vdev config Michal Kazior
2015-01-30 8:41 ` [PATCH 2/7] ath10k: implement chanctx API Michal Kazior
2015-01-30 10:44 ` Michal Kazior
2015-01-30 8:41 ` [PATCH 3/7] ath10k: implement adaptive qcs command Michal Kazior
2015-01-30 8:41 ` [PATCH 4/7] ath10k: protect ar->arvifs linking with data_lock Michal Kazior
2015-01-30 8:41 ` [PATCH 5/7] ath10k: rework tx queue locking Michal Kazior
2015-01-30 8:41 ` [PATCH 6/7] ath10k: implement tx pause wmi event Michal Kazior
2015-01-30 8:41 ` [PATCH 7/7] ath10k: enable multi-channel on supported devices Michal Kazior
2015-01-30 12:31 ` [PATCH v2 0/7] ath10k: add multi-channel support Michal Kazior
2015-01-30 12:31 ` [PATCH v2 1/7] ath10k: allow empty ssid vdev config Michal Kazior
2015-01-30 12:31 ` [PATCH v2 2/7] ath10k: implement chanctx API Michal Kazior
2015-01-30 12:45 ` Johannes Berg
2015-01-30 13:02 ` Michal Kazior
2015-01-30 13:04 ` Johannes Berg
2015-01-30 13:22 ` Michal Kazior
2015-01-30 13:31 ` Johannes Berg
2015-01-30 13:47 ` Michal Kazior
2015-01-30 14:06 ` Johannes Berg
2015-01-30 12:58 ` Johannes Berg
2015-01-30 13:06 ` Michal Kazior
2015-01-30 13:10 ` Johannes Berg
2015-01-30 14:01 ` Michal Kazior
2015-01-30 14:10 ` Johannes Berg
2015-01-30 12:31 ` [PATCH v2 3/7] ath10k: implement adaptive qcs command Michal Kazior
2015-01-30 12:31 ` [PATCH v2 4/7] ath10k: protect ar->arvifs linking with data_lock Michal Kazior
2015-01-30 12:31 ` Michal Kazior [this message]
2015-01-30 12:31 ` [PATCH v2 6/7] ath10k: implement tx pause wmi event Michal Kazior
2015-01-30 12:31 ` [PATCH v2 7/7] ath10k: enable multi-channel on supported devices Michal Kazior
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