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From: Rakesh Pillai <pillair@codeaurora.org>
To: ath10k@lists.infradead.org
Cc: linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org,
	kvalo@codeaurora.org, johannes@sipsolutions.net,
	davem@davemloft.net, kuba@kernel.org, netdev@vger.kernel.org,
	dianders@chromium.org, evgreen@chromium.org,
	Rakesh Pillai <pillair@codeaurora.org>
Subject: [RFC 2/7] ath10k: Add support to process rx packet in thread
Date: Tue, 21 Jul 2020 22:44:21 +0530	[thread overview]
Message-ID: <1595351666-28193-3-git-send-email-pillair@codeaurora.org> (raw)
In-Reply-To: <1595351666-28193-1-git-send-email-pillair@codeaurora.org>

NAPI instance gets scheduled on a CPU core on which
the IRQ was triggered. The processing of rx packets
can be CPU intensive and since NAPI cannot be moved
to a different CPU core, to get better performance,
its better to move the gist of rx packet processing
in a high priority thread.

Add the init/deinit part for a thread to process the
receive packets.

Tested-on: WCN3990 hw1.0 SNOC WLAN.HL.3.1-01040-QCAHLSWMTPLZ-1

Signed-off-by: Rakesh Pillai <pillair@codeaurora.org>
---
 drivers/net/wireless/ath/ath10k/core.c | 33 +++++++++++++++++++++++++++
 drivers/net/wireless/ath/ath10k/core.h | 23 +++++++++++++++++++
 drivers/net/wireless/ath/ath10k/snoc.c | 41 ++++++++++++++++++++++++++++++++++
 3 files changed, 97 insertions(+)

diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index 9104496..2b520a0 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -668,6 +668,39 @@ static unsigned int ath10k_core_get_fw_feature_str(char *buf,
 	return scnprintf(buf, buf_len, "%s", ath10k_core_fw_feature_str[feat]);
 }
 
+int ath10k_core_thread_shutdown(struct ath10k *ar,
+				struct ath10k_thread *thread)
+{
+	ath10k_dbg(ar, ATH10K_DBG_BOOT, "shutting down %s\n", thread->name);
+	set_bit(ATH10K_THREAD_EVENT_SHUTDOWN, thread->event_flags);
+	wake_up_process(thread->task);
+	wait_for_completion(&thread->shutdown);
+	ath10k_info(ar, "thread %s exited\n", thread->name);
+
+	return 0;
+}
+EXPORT_SYMBOL(ath10k_core_thread_shutdown);
+
+int ath10k_core_thread_init(struct ath10k *ar,
+			    struct ath10k_thread *thread,
+			    int (*handler)(void *data),
+			    char *thread_name)
+{
+	thread->task = kthread_create(handler, thread, thread_name);
+	if (IS_ERR(thread->task))
+		return -EINVAL;
+
+	init_waitqueue_head(&thread->wait_q);
+	init_completion(&thread->shutdown);
+	memcpy(thread->name, thread_name, ATH10K_THREAD_NAME_SIZE_MAX);
+	clear_bit(ATH10K_THREAD_EVENT_SHUTDOWN, thread->event_flags);
+	ath10k_info(ar, "Starting thread %s\n", thread_name);
+	wake_up_process(thread->task);
+
+	return 0;
+}
+EXPORT_SYMBOL(ath10k_core_thread_init);
+
 void ath10k_core_get_fw_features_str(struct ath10k *ar,
 				     char *buf,
 				     size_t buf_len)
diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index 5c18f6c..96919e8 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -970,6 +970,22 @@ struct ath10k_bus_params {
 	bool hl_msdu_ids;
 };
 
+#define ATH10K_THREAD_NAME_SIZE_MAX	32
+
+enum ath10k_thread_events {
+	ATH10K_THREAD_EVENT_SHUTDOWN,
+	ATH10K_THREAD_EVENT_MAX,
+};
+
+struct ath10k_thread {
+	struct ath10k *ar;
+	struct task_struct *task;
+	struct completion shutdown;
+	wait_queue_head_t wait_q;
+	DECLARE_BITMAP(event_flags, ATH10K_THREAD_EVENT_MAX);
+	char name[ATH10K_THREAD_NAME_SIZE_MAX];
+};
+
 struct ath10k {
 	struct ath_common ath_common;
 	struct ieee80211_hw *hw;
@@ -982,6 +998,7 @@ struct ath10k {
 	} msa;
 	u8 mac_addr[ETH_ALEN];
 
+	struct ath10k_thread rx_thread;
 	enum ath10k_hw_rev hw_rev;
 	u16 dev_id;
 	u32 chip_id;
@@ -1276,6 +1293,12 @@ static inline bool ath10k_peer_stats_enabled(struct ath10k *ar)
 
 extern unsigned long ath10k_coredump_mask;
 
+int ath10k_core_thread_shutdown(struct ath10k *ar,
+				struct ath10k_thread *thread);
+int ath10k_core_thread_init(struct ath10k *ar,
+			    struct ath10k_thread *thread,
+			    int (*handler)(void *data),
+			    char *thread_name);
 struct ath10k *ath10k_core_create(size_t priv_size, struct device *dev,
 				  enum ath10k_bus bus,
 				  enum ath10k_hw_rev hw_rev,
diff --git a/drivers/net/wireless/ath/ath10k/snoc.c b/drivers/net/wireless/ath/ath10k/snoc.c
index 1ef5fdb..463c34e 100644
--- a/drivers/net/wireless/ath/ath10k/snoc.c
+++ b/drivers/net/wireless/ath/ath10k/snoc.c
@@ -909,6 +909,31 @@ static void ath10k_snoc_buffer_cleanup(struct ath10k *ar)
 	}
 }
 
+int ath10k_snoc_rx_thread_loop(void *data)
+{
+	struct ath10k_thread *rx_thread = data;
+	struct ath10k *ar = rx_thread->ar;
+	bool shutdown = false;
+
+	ath10k_dbg(ar, ATH10K_DBG_SNOC, "rx thread started\n");
+	set_user_nice(current, -1);
+
+	while (!shutdown) {
+		wait_event_interruptible(
+			rx_thread->wait_q,
+			(test_bit(ATH10K_THREAD_EVENT_SHUTDOWN,
+				  rx_thread->event_flags)));
+		if (test_and_clear_bit(ATH10K_THREAD_EVENT_SHUTDOWN,
+				       rx_thread->event_flags))
+			shutdown = true;
+	}
+
+	ath10k_dbg(ar, ATH10K_DBG_SNOC, "rx thread exiting\n");
+	complete(&rx_thread->shutdown);
+
+	do_exit(0);
+}
+
 static void ath10k_snoc_hif_stop(struct ath10k *ar)
 {
 	if (!test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags))
@@ -916,6 +941,7 @@ static void ath10k_snoc_hif_stop(struct ath10k *ar)
 
 	napi_synchronize(&ar->napi);
 	napi_disable(&ar->napi);
+	ath10k_core_thread_shutdown(ar, &ar->rx_thread);
 	ath10k_snoc_buffer_cleanup(ar);
 	ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot hif stop\n");
 }
@@ -923,9 +949,19 @@ static void ath10k_snoc_hif_stop(struct ath10k *ar)
 static int ath10k_snoc_hif_start(struct ath10k *ar)
 {
 	struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+	int ret;
 
 	bitmap_clear(ar_snoc->pending_ce_irqs, 0, CE_COUNT_MAX);
 	napi_enable(&ar->napi);
+
+	ret = ath10k_core_thread_init(ar, &ar->rx_thread,
+				      ath10k_snoc_rx_thread_loop,
+				      "ath10k_rx_thread");
+	if (ret) {
+		ath10k_err(ar, "failed to start rx thread\n");
+		goto rx_thread_fail;
+	}
+
 	ath10k_snoc_irq_enable(ar);
 	ath10k_snoc_rx_post(ar);
 
@@ -934,6 +970,10 @@ static int ath10k_snoc_hif_start(struct ath10k *ar)
 	ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot hif start\n");
 
 	return 0;
+
+rx_thread_fail:
+	napi_disable(&ar->napi);
+	return ret;
 }
 
 static int ath10k_snoc_init_pipes(struct ath10k *ar)
@@ -1652,6 +1692,7 @@ static int ath10k_snoc_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 
+	ar->rx_thread.ar = ar;
 	ar_snoc = ath10k_snoc_priv(ar);
 	ar_snoc->dev = pdev;
 	platform_set_drvdata(pdev, ar);
-- 
2.7.4


WARNING: multiple messages have this Message-ID
From: Rakesh Pillai <pillair@codeaurora.org>
To: ath10k@lists.infradead.org
Cc: netdev@vger.kernel.org, linux-wireless@vger.kernel.org,
	linux-kernel@vger.kernel.org, evgreen@chromium.org,
	dianders@chromium.org, Rakesh Pillai <pillair@codeaurora.org>,
	kuba@kernel.org, johannes@sipsolutions.net, davem@davemloft.net,
	kvalo@codeaurora.org
Subject: [RFC 2/7] ath10k: Add support to process rx packet in thread
Date: Tue, 21 Jul 2020 22:44:21 +0530	[thread overview]
Message-ID: <1595351666-28193-3-git-send-email-pillair@codeaurora.org> (raw)
In-Reply-To: <1595351666-28193-1-git-send-email-pillair@codeaurora.org>

NAPI instance gets scheduled on a CPU core on which
the IRQ was triggered. The processing of rx packets
can be CPU intensive and since NAPI cannot be moved
to a different CPU core, to get better performance,
its better to move the gist of rx packet processing
in a high priority thread.

Add the init/deinit part for a thread to process the
receive packets.

Tested-on: WCN3990 hw1.0 SNOC WLAN.HL.3.1-01040-QCAHLSWMTPLZ-1

Signed-off-by: Rakesh Pillai <pillair@codeaurora.org>
---
 drivers/net/wireless/ath/ath10k/core.c | 33 +++++++++++++++++++++++++++
 drivers/net/wireless/ath/ath10k/core.h | 23 +++++++++++++++++++
 drivers/net/wireless/ath/ath10k/snoc.c | 41 ++++++++++++++++++++++++++++++++++
 3 files changed, 97 insertions(+)

diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index 9104496..2b520a0 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -668,6 +668,39 @@ static unsigned int ath10k_core_get_fw_feature_str(char *buf,
 	return scnprintf(buf, buf_len, "%s", ath10k_core_fw_feature_str[feat]);
 }
 
+int ath10k_core_thread_shutdown(struct ath10k *ar,
+				struct ath10k_thread *thread)
+{
+	ath10k_dbg(ar, ATH10K_DBG_BOOT, "shutting down %s\n", thread->name);
+	set_bit(ATH10K_THREAD_EVENT_SHUTDOWN, thread->event_flags);
+	wake_up_process(thread->task);
+	wait_for_completion(&thread->shutdown);
+	ath10k_info(ar, "thread %s exited\n", thread->name);
+
+	return 0;
+}
+EXPORT_SYMBOL(ath10k_core_thread_shutdown);
+
+int ath10k_core_thread_init(struct ath10k *ar,
+			    struct ath10k_thread *thread,
+			    int (*handler)(void *data),
+			    char *thread_name)
+{
+	thread->task = kthread_create(handler, thread, thread_name);
+	if (IS_ERR(thread->task))
+		return -EINVAL;
+
+	init_waitqueue_head(&thread->wait_q);
+	init_completion(&thread->shutdown);
+	memcpy(thread->name, thread_name, ATH10K_THREAD_NAME_SIZE_MAX);
+	clear_bit(ATH10K_THREAD_EVENT_SHUTDOWN, thread->event_flags);
+	ath10k_info(ar, "Starting thread %s\n", thread_name);
+	wake_up_process(thread->task);
+
+	return 0;
+}
+EXPORT_SYMBOL(ath10k_core_thread_init);
+
 void ath10k_core_get_fw_features_str(struct ath10k *ar,
 				     char *buf,
 				     size_t buf_len)
diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index 5c18f6c..96919e8 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -970,6 +970,22 @@ struct ath10k_bus_params {
 	bool hl_msdu_ids;
 };
 
+#define ATH10K_THREAD_NAME_SIZE_MAX	32
+
+enum ath10k_thread_events {
+	ATH10K_THREAD_EVENT_SHUTDOWN,
+	ATH10K_THREAD_EVENT_MAX,
+};
+
+struct ath10k_thread {
+	struct ath10k *ar;
+	struct task_struct *task;
+	struct completion shutdown;
+	wait_queue_head_t wait_q;
+	DECLARE_BITMAP(event_flags, ATH10K_THREAD_EVENT_MAX);
+	char name[ATH10K_THREAD_NAME_SIZE_MAX];
+};
+
 struct ath10k {
 	struct ath_common ath_common;
 	struct ieee80211_hw *hw;
@@ -982,6 +998,7 @@ struct ath10k {
 	} msa;
 	u8 mac_addr[ETH_ALEN];
 
+	struct ath10k_thread rx_thread;
 	enum ath10k_hw_rev hw_rev;
 	u16 dev_id;
 	u32 chip_id;
@@ -1276,6 +1293,12 @@ static inline bool ath10k_peer_stats_enabled(struct ath10k *ar)
 
 extern unsigned long ath10k_coredump_mask;
 
+int ath10k_core_thread_shutdown(struct ath10k *ar,
+				struct ath10k_thread *thread);
+int ath10k_core_thread_init(struct ath10k *ar,
+			    struct ath10k_thread *thread,
+			    int (*handler)(void *data),
+			    char *thread_name);
 struct ath10k *ath10k_core_create(size_t priv_size, struct device *dev,
 				  enum ath10k_bus bus,
 				  enum ath10k_hw_rev hw_rev,
diff --git a/drivers/net/wireless/ath/ath10k/snoc.c b/drivers/net/wireless/ath/ath10k/snoc.c
index 1ef5fdb..463c34e 100644
--- a/drivers/net/wireless/ath/ath10k/snoc.c
+++ b/drivers/net/wireless/ath/ath10k/snoc.c
@@ -909,6 +909,31 @@ static void ath10k_snoc_buffer_cleanup(struct ath10k *ar)
 	}
 }
 
+int ath10k_snoc_rx_thread_loop(void *data)
+{
+	struct ath10k_thread *rx_thread = data;
+	struct ath10k *ar = rx_thread->ar;
+	bool shutdown = false;
+
+	ath10k_dbg(ar, ATH10K_DBG_SNOC, "rx thread started\n");
+	set_user_nice(current, -1);
+
+	while (!shutdown) {
+		wait_event_interruptible(
+			rx_thread->wait_q,
+			(test_bit(ATH10K_THREAD_EVENT_SHUTDOWN,
+				  rx_thread->event_flags)));
+		if (test_and_clear_bit(ATH10K_THREAD_EVENT_SHUTDOWN,
+				       rx_thread->event_flags))
+			shutdown = true;
+	}
+
+	ath10k_dbg(ar, ATH10K_DBG_SNOC, "rx thread exiting\n");
+	complete(&rx_thread->shutdown);
+
+	do_exit(0);
+}
+
 static void ath10k_snoc_hif_stop(struct ath10k *ar)
 {
 	if (!test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags))
@@ -916,6 +941,7 @@ static void ath10k_snoc_hif_stop(struct ath10k *ar)
 
 	napi_synchronize(&ar->napi);
 	napi_disable(&ar->napi);
+	ath10k_core_thread_shutdown(ar, &ar->rx_thread);
 	ath10k_snoc_buffer_cleanup(ar);
 	ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot hif stop\n");
 }
@@ -923,9 +949,19 @@ static void ath10k_snoc_hif_stop(struct ath10k *ar)
 static int ath10k_snoc_hif_start(struct ath10k *ar)
 {
 	struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+	int ret;
 
 	bitmap_clear(ar_snoc->pending_ce_irqs, 0, CE_COUNT_MAX);
 	napi_enable(&ar->napi);
+
+	ret = ath10k_core_thread_init(ar, &ar->rx_thread,
+				      ath10k_snoc_rx_thread_loop,
+				      "ath10k_rx_thread");
+	if (ret) {
+		ath10k_err(ar, "failed to start rx thread\n");
+		goto rx_thread_fail;
+	}
+
 	ath10k_snoc_irq_enable(ar);
 	ath10k_snoc_rx_post(ar);
 
@@ -934,6 +970,10 @@ static int ath10k_snoc_hif_start(struct ath10k *ar)
 	ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot hif start\n");
 
 	return 0;
+
+rx_thread_fail:
+	napi_disable(&ar->napi);
+	return ret;
 }
 
 static int ath10k_snoc_init_pipes(struct ath10k *ar)
@@ -1652,6 +1692,7 @@ static int ath10k_snoc_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 
+	ar->rx_thread.ar = ar;
 	ar_snoc = ath10k_snoc_priv(ar);
 	ar_snoc->dev = pdev;
 	platform_set_drvdata(pdev, ar);
-- 
2.7.4


_______________________________________________
ath10k mailing list
ath10k@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/ath10k

  parent reply	other threads:[~2020-07-21 17:15 UTC|newest]

Thread overview: 96+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-21 17:14 [RFC 0/7] Add support to process rx packets " Rakesh Pillai
2020-07-21 17:14 ` Rakesh Pillai
2020-07-21 17:14 ` [RFC 1/7] mac80211: Add check for napi handle before WARN_ON Rakesh Pillai
2020-07-21 17:14   ` Rakesh Pillai
2020-07-22 12:56   ` Johannes Berg
2020-07-22 12:56     ` Johannes Berg
2020-07-23 18:26     ` Rakesh Pillai
2020-07-23 18:26       ` Rakesh Pillai
2020-07-23 20:06       ` Johannes Berg
2020-07-23 20:06         ` Johannes Berg
2020-07-24  6:21         ` Rakesh Pillai
2020-07-24  6:21           ` Rakesh Pillai
2020-07-26 16:19         ` Rakesh Pillai
2020-07-26 16:19           ` Rakesh Pillai
2020-07-30 12:40           ` Johannes Berg
2020-07-30 12:40             ` Johannes Berg
2020-07-21 17:14 ` Rakesh Pillai [this message]
2020-07-21 17:14   ` [RFC 2/7] ath10k: Add support to process rx packet in thread Rakesh Pillai
2020-07-21 21:53   ` Rajkumar Manoharan
2020-07-21 21:53     ` Rajkumar Manoharan
2020-07-22 12:27     ` Felix Fietkau
2020-07-22 12:27       ` Felix Fietkau
2020-07-22 12:55       ` Johannes Berg
2020-07-22 12:55         ` Johannes Berg
2020-07-22 13:00         ` Felix Fietkau
2020-07-22 13:00           ` Felix Fietkau
2020-07-23  6:09           ` Rajkumar Manoharan
2020-07-23  6:09             ` Rajkumar Manoharan
2021-03-22 23:57           ` Ben Greear
2021-03-22 23:57             ` Ben Greear
2021-03-23  1:20             ` Brian Norris
2021-03-23  1:20               ` Brian Norris
2021-03-23  3:01               ` Ben Greear
2021-03-23  3:01                 ` Ben Greear
2021-03-23  7:45                 ` Felix Fietkau
2021-03-23  7:45                   ` Felix Fietkau
2021-03-25  9:45                   ` Rakesh Pillai
2021-03-25  9:45                     ` Rakesh Pillai
2021-03-25 10:33                     ` Felix Fietkau
2021-03-25 10:33                       ` Felix Fietkau
2020-07-23 18:25     ` Rakesh Pillai
2020-07-23 18:25       ` Rakesh Pillai
2020-07-24 23:11       ` Jacob Keller
2020-07-24 23:11         ` Jacob Keller
2020-07-21 17:14 ` [RFC 3/7] ath10k: Add module param to enable rx thread Rakesh Pillai
2020-07-21 17:14   ` Rakesh Pillai
2020-07-21 17:14 ` [RFC 4/7] ath10k: Do not exhaust budget on process tx completion Rakesh Pillai
2020-07-21 17:14   ` Rakesh Pillai
2020-07-21 17:14 ` [RFC 5/7] ath10k: Handle the rx packet processing in thread Rakesh Pillai
2020-07-21 17:14   ` Rakesh Pillai
2020-07-21 17:14 ` [RFC 6/7] ath10k: Add deliver to stack from thread context Rakesh Pillai
2020-07-21 17:14   ` Rakesh Pillai
2020-07-21 17:14 ` [RFC 7/7] ath10k: Handle rx thread suspend and resume Rakesh Pillai
2020-07-21 17:14   ` Rakesh Pillai
2020-07-23 23:06   ` Sebastian Gottschall
2020-07-23 23:06     ` Sebastian Gottschall
2020-07-24  6:19     ` Rakesh Pillai
2020-07-24  6:19       ` Rakesh Pillai
2020-07-21 17:25 ` [RFC 0/7] Add support to process rx packets in thread Andrew Lunn
2020-07-21 17:25   ` Andrew Lunn
2020-07-21 18:05   ` Florian Fainelli
2020-07-21 18:05     ` Florian Fainelli
2020-07-23 18:21     ` Rakesh Pillai
2020-07-23 18:21       ` Rakesh Pillai
2020-07-23 19:02       ` Florian Fainelli
2020-07-23 19:02         ` Florian Fainelli
2020-07-24  6:20         ` Rakesh Pillai
2020-07-24  6:20           ` Rakesh Pillai
2020-07-24 22:28           ` Florian Fainelli
2020-07-24 22:28             ` Florian Fainelli
2020-07-22  9:12   ` David Laight
2020-07-22  9:12     ` David Laight
2020-07-25  8:16     ` Hillf Danton
2020-07-25 10:38       ` Sebastian Gottschall
2020-07-25 10:38         ` Sebastian Gottschall
2020-07-25 12:25         ` Hillf Danton
2020-07-25 14:08         ` Sebastian Gottschall
2020-07-25 14:08           ` Sebastian Gottschall
2020-07-25 14:57           ` Hillf Danton
2020-07-25 15:41             ` Sebastian Gottschall
2020-07-25 15:41               ` Sebastian Gottschall
2020-07-26 11:16               ` David Laight
2020-07-26 11:16                 ` David Laight
2020-07-28 16:59                 ` Rakesh Pillai
2020-07-28 16:59                   ` Rakesh Pillai
2020-07-29  1:34                   ` Hillf Danton
2020-07-25 17:57       ` Felix Fietkau
2020-07-25 17:57         ` Felix Fietkau
2020-07-26  1:22         ` Hillf Danton
2020-07-26  8:10           ` Felix Fietkau
2020-07-26  8:10             ` Felix Fietkau
2020-07-26  8:32             ` Hillf Danton
2020-07-26  8:59               ` Felix Fietkau
2020-07-26  8:59                 ` Felix Fietkau
2020-07-22 16:20   ` Jakub Kicinski
2020-07-22 16:20     ` Jakub Kicinski

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