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From: Sebastian Gottschall <s.gottschall@dd-wrt.com>
To: Rakesh Pillai <pillair@codeaurora.org>, 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
Subject: Re: [RFC 7/7] ath10k: Handle rx thread suspend and resume
Date: Fri, 24 Jul 2020 01:06:23 +0200	[thread overview]
Message-ID: <1540605b-c54e-d482-296f-8139eb07c195@dd-wrt.com> (raw)
In-Reply-To: <1595351666-28193-8-git-send-email-pillair@codeaurora.org>

your patch seem to only affect the WCN3990 chipset. all other ath10k 
supported chipset are not supported here. so you see a chance to 
implement this more generic?

Sebastian

Am 21.07.2020 um 19:14 schrieb Rakesh Pillai:
> During the system suspend or resume, the rx thread
> also needs to be suspended or resume respectively.
>
> Handle the rx thread as well during the system
> suspend and resume.
>
> 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 | 23 ++++++++++++++++++
>   drivers/net/wireless/ath/ath10k/core.h |  5 ++++
>   drivers/net/wireless/ath/ath10k/snoc.c | 44 +++++++++++++++++++++++++++++++++-
>   3 files changed, 71 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
> index 4064fa2..b82b355 100644
> --- a/drivers/net/wireless/ath/ath10k/core.c
> +++ b/drivers/net/wireless/ath/ath10k/core.c
> @@ -668,6 +668,27 @@ 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_suspend(struct ath10k_thread *thread)
> +{
> +	ath10k_dbg(thread->ar, ATH10K_DBG_BOOT, "Suspending thread %s\n",
> +		   thread->name);
> +	set_bit(ATH10K_THREAD_EVENT_SUSPEND, thread->event_flags);
> +	wait_for_completion(&thread->suspend);
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL(ath10k_core_thread_suspend);
> +
> +int ath10k_core_thread_resume(struct ath10k_thread *thread)
> +{
> +	ath10k_dbg(thread->ar, ATH10K_DBG_BOOT, "Resuming thread %s\n",
> +		   thread->name);
> +	complete(&thread->resume);
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL(ath10k_core_thread_resume);
> +
>   void ath10k_core_thread_post_event(struct ath10k_thread *thread,
>   				   enum ath10k_thread_events event)
>   {
> @@ -700,6 +721,8 @@ int ath10k_core_thread_init(struct ath10k *ar,
>   
>   	init_waitqueue_head(&thread->wait_q);
>   	init_completion(&thread->shutdown);
> +	init_completion(&thread->suspend);
> +	init_completion(&thread->resume);
>   	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);
> diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
> index 596d31b..df65e75 100644
> --- a/drivers/net/wireless/ath/ath10k/core.h
> +++ b/drivers/net/wireless/ath/ath10k/core.h
> @@ -976,6 +976,7 @@ enum ath10k_thread_events {
>   	ATH10K_THREAD_EVENT_SHUTDOWN,
>   	ATH10K_THREAD_EVENT_RX_POST,
>   	ATH10K_THREAD_EVENT_TX_POST,
> +	ATH10K_THREAD_EVENT_SUSPEND,
>   	ATH10K_THREAD_EVENT_MAX,
>   };
>   
> @@ -983,6 +984,8 @@ struct ath10k_thread {
>   	struct ath10k *ar;
>   	struct task_struct *task;
>   	struct completion shutdown;
> +	struct completion suspend;
> +	struct completion resume;
>   	wait_queue_head_t wait_q;
>   	DECLARE_BITMAP(event_flags, ATH10K_THREAD_EVENT_MAX);
>   	char name[ATH10K_THREAD_NAME_SIZE_MAX];
> @@ -1296,6 +1299,8 @@ static inline bool ath10k_peer_stats_enabled(struct ath10k *ar)
>   
>   extern unsigned long ath10k_coredump_mask;
>   
> +int ath10k_core_thread_suspend(struct ath10k_thread *thread);
> +int ath10k_core_thread_resume(struct ath10k_thread *thread);
>   void ath10k_core_thread_post_event(struct ath10k_thread *thread,
>   				   enum ath10k_thread_events event);
>   int ath10k_core_thread_shutdown(struct ath10k *ar,
> diff --git a/drivers/net/wireless/ath/ath10k/snoc.c b/drivers/net/wireless/ath/ath10k/snoc.c
> index 3eb5eac..a373b2b 100644
> --- a/drivers/net/wireless/ath/ath10k/snoc.c
> +++ b/drivers/net/wireless/ath/ath10k/snoc.c
> @@ -932,13 +932,31 @@ int ath10k_snoc_rx_thread_loop(void *data)
>   					    rx_thread->event_flags) ||
>   			 test_and_clear_bit(ATH10K_THREAD_EVENT_TX_POST,
>   					    rx_thread->event_flags) ||
> +			 test_bit(ATH10K_THREAD_EVENT_SUSPEND,
> +				  rx_thread->event_flags) ||
>   			 test_bit(ATH10K_THREAD_EVENT_SHUTDOWN,
>   				  rx_thread->event_flags)));
>   
> +		if (test_and_clear_bit(ATH10K_THREAD_EVENT_SUSPEND,
> +				       rx_thread->event_flags)) {
> +			complete(&rx_thread->suspend);
> +			ath10k_info(ar, "rx thread suspend\n");
> +			wait_for_completion(&rx_thread->resume);
> +			ath10k_info(ar, "rx thread resume\n");
> +		}
> +
>   		ath10k_htt_txrx_compl_task(ar, thread_budget);
>   		if (test_and_clear_bit(ATH10K_THREAD_EVENT_SHUTDOWN,
>   				       rx_thread->event_flags))
>   			shutdown = true;
> +
> +		if (test_and_clear_bit(ATH10K_THREAD_EVENT_SUSPEND,
> +				       rx_thread->event_flags)) {
> +			complete(&rx_thread->suspend);
> +			ath10k_info(ar, "rx thread suspend\n");
> +			wait_for_completion(&rx_thread->resume);
> +			ath10k_info(ar, "rx thread resume\n");
> +		}
>   	}
>   
>   	ath10k_dbg(ar, ATH10K_DBG_SNOC, "rx thread exiting\n");
> @@ -1133,15 +1151,30 @@ static int ath10k_snoc_hif_suspend(struct ath10k *ar)
>   	if (!device_may_wakeup(ar->dev))
>   		return -EPERM;
>   
> +	if (ar->rx_thread_enable) {
> +		ret = ath10k_core_thread_suspend(&ar->rx_thread);
> +		if (ret) {
> +			ath10k_err(ar, "failed to suspend rx_thread, %d\n",
> +				   ret);
> +			return ret;
> +		}
> +	}
> +
>   	ret = enable_irq_wake(ar_snoc->ce_irqs[ATH10K_SNOC_WAKE_IRQ].irq_line);
>   	if (ret) {
>   		ath10k_err(ar, "failed to enable wakeup irq :%d\n", ret);
> -		return ret;
> +		goto fail;
>   	}
>   
>   	ath10k_dbg(ar, ATH10K_DBG_SNOC, "snoc device suspended\n");
>   
>   	return ret;
> +
> +fail:
> +	if (ar->rx_thread_enable)
> +		ath10k_core_thread_resume(&ar->rx_thread);
> +
> +	return ret;
>   }
>   
>   static int ath10k_snoc_hif_resume(struct ath10k *ar)
> @@ -1158,6 +1191,15 @@ static int ath10k_snoc_hif_resume(struct ath10k *ar)
>   		return ret;
>   	}
>   
> +	if (ar->rx_thread_enable) {
> +		ret = ath10k_core_thread_resume(&ar->rx_thread);
> +		if (ret) {
> +			ath10k_err(ar, "failed to suspend rx_thread, %d\n",
> +				   ret);
> +			return ret;
> +		}
> +	}
> +
>   	ath10k_dbg(ar, ATH10K_DBG_SNOC, "snoc device resumed\n");
>   
>   	return ret;

WARNING: multiple messages have this Message-ID
From: Sebastian Gottschall <s.gottschall@dd-wrt.com>
To: Rakesh Pillai <pillair@codeaurora.org>, 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, kuba@kernel.org,
	johannes@sipsolutions.net, davem@davemloft.net,
	kvalo@codeaurora.org
Subject: Re: [RFC 7/7] ath10k: Handle rx thread suspend and resume
Date: Fri, 24 Jul 2020 01:06:23 +0200	[thread overview]
Message-ID: <1540605b-c54e-d482-296f-8139eb07c195@dd-wrt.com> (raw)
In-Reply-To: <1595351666-28193-8-git-send-email-pillair@codeaurora.org>

your patch seem to only affect the WCN3990 chipset. all other ath10k 
supported chipset are not supported here. so you see a chance to 
implement this more generic?

Sebastian

Am 21.07.2020 um 19:14 schrieb Rakesh Pillai:
> During the system suspend or resume, the rx thread
> also needs to be suspended or resume respectively.
>
> Handle the rx thread as well during the system
> suspend and resume.
>
> 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 | 23 ++++++++++++++++++
>   drivers/net/wireless/ath/ath10k/core.h |  5 ++++
>   drivers/net/wireless/ath/ath10k/snoc.c | 44 +++++++++++++++++++++++++++++++++-
>   3 files changed, 71 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
> index 4064fa2..b82b355 100644
> --- a/drivers/net/wireless/ath/ath10k/core.c
> +++ b/drivers/net/wireless/ath/ath10k/core.c
> @@ -668,6 +668,27 @@ 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_suspend(struct ath10k_thread *thread)
> +{
> +	ath10k_dbg(thread->ar, ATH10K_DBG_BOOT, "Suspending thread %s\n",
> +		   thread->name);
> +	set_bit(ATH10K_THREAD_EVENT_SUSPEND, thread->event_flags);
> +	wait_for_completion(&thread->suspend);
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL(ath10k_core_thread_suspend);
> +
> +int ath10k_core_thread_resume(struct ath10k_thread *thread)
> +{
> +	ath10k_dbg(thread->ar, ATH10K_DBG_BOOT, "Resuming thread %s\n",
> +		   thread->name);
> +	complete(&thread->resume);
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL(ath10k_core_thread_resume);
> +
>   void ath10k_core_thread_post_event(struct ath10k_thread *thread,
>   				   enum ath10k_thread_events event)
>   {
> @@ -700,6 +721,8 @@ int ath10k_core_thread_init(struct ath10k *ar,
>   
>   	init_waitqueue_head(&thread->wait_q);
>   	init_completion(&thread->shutdown);
> +	init_completion(&thread->suspend);
> +	init_completion(&thread->resume);
>   	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);
> diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
> index 596d31b..df65e75 100644
> --- a/drivers/net/wireless/ath/ath10k/core.h
> +++ b/drivers/net/wireless/ath/ath10k/core.h
> @@ -976,6 +976,7 @@ enum ath10k_thread_events {
>   	ATH10K_THREAD_EVENT_SHUTDOWN,
>   	ATH10K_THREAD_EVENT_RX_POST,
>   	ATH10K_THREAD_EVENT_TX_POST,
> +	ATH10K_THREAD_EVENT_SUSPEND,
>   	ATH10K_THREAD_EVENT_MAX,
>   };
>   
> @@ -983,6 +984,8 @@ struct ath10k_thread {
>   	struct ath10k *ar;
>   	struct task_struct *task;
>   	struct completion shutdown;
> +	struct completion suspend;
> +	struct completion resume;
>   	wait_queue_head_t wait_q;
>   	DECLARE_BITMAP(event_flags, ATH10K_THREAD_EVENT_MAX);
>   	char name[ATH10K_THREAD_NAME_SIZE_MAX];
> @@ -1296,6 +1299,8 @@ static inline bool ath10k_peer_stats_enabled(struct ath10k *ar)
>   
>   extern unsigned long ath10k_coredump_mask;
>   
> +int ath10k_core_thread_suspend(struct ath10k_thread *thread);
> +int ath10k_core_thread_resume(struct ath10k_thread *thread);
>   void ath10k_core_thread_post_event(struct ath10k_thread *thread,
>   				   enum ath10k_thread_events event);
>   int ath10k_core_thread_shutdown(struct ath10k *ar,
> diff --git a/drivers/net/wireless/ath/ath10k/snoc.c b/drivers/net/wireless/ath/ath10k/snoc.c
> index 3eb5eac..a373b2b 100644
> --- a/drivers/net/wireless/ath/ath10k/snoc.c
> +++ b/drivers/net/wireless/ath/ath10k/snoc.c
> @@ -932,13 +932,31 @@ int ath10k_snoc_rx_thread_loop(void *data)
>   					    rx_thread->event_flags) ||
>   			 test_and_clear_bit(ATH10K_THREAD_EVENT_TX_POST,
>   					    rx_thread->event_flags) ||
> +			 test_bit(ATH10K_THREAD_EVENT_SUSPEND,
> +				  rx_thread->event_flags) ||
>   			 test_bit(ATH10K_THREAD_EVENT_SHUTDOWN,
>   				  rx_thread->event_flags)));
>   
> +		if (test_and_clear_bit(ATH10K_THREAD_EVENT_SUSPEND,
> +				       rx_thread->event_flags)) {
> +			complete(&rx_thread->suspend);
> +			ath10k_info(ar, "rx thread suspend\n");
> +			wait_for_completion(&rx_thread->resume);
> +			ath10k_info(ar, "rx thread resume\n");
> +		}
> +
>   		ath10k_htt_txrx_compl_task(ar, thread_budget);
>   		if (test_and_clear_bit(ATH10K_THREAD_EVENT_SHUTDOWN,
>   				       rx_thread->event_flags))
>   			shutdown = true;
> +
> +		if (test_and_clear_bit(ATH10K_THREAD_EVENT_SUSPEND,
> +				       rx_thread->event_flags)) {
> +			complete(&rx_thread->suspend);
> +			ath10k_info(ar, "rx thread suspend\n");
> +			wait_for_completion(&rx_thread->resume);
> +			ath10k_info(ar, "rx thread resume\n");
> +		}
>   	}
>   
>   	ath10k_dbg(ar, ATH10K_DBG_SNOC, "rx thread exiting\n");
> @@ -1133,15 +1151,30 @@ static int ath10k_snoc_hif_suspend(struct ath10k *ar)
>   	if (!device_may_wakeup(ar->dev))
>   		return -EPERM;
>   
> +	if (ar->rx_thread_enable) {
> +		ret = ath10k_core_thread_suspend(&ar->rx_thread);
> +		if (ret) {
> +			ath10k_err(ar, "failed to suspend rx_thread, %d\n",
> +				   ret);
> +			return ret;
> +		}
> +	}
> +
>   	ret = enable_irq_wake(ar_snoc->ce_irqs[ATH10K_SNOC_WAKE_IRQ].irq_line);
>   	if (ret) {
>   		ath10k_err(ar, "failed to enable wakeup irq :%d\n", ret);
> -		return ret;
> +		goto fail;
>   	}
>   
>   	ath10k_dbg(ar, ATH10K_DBG_SNOC, "snoc device suspended\n");
>   
>   	return ret;
> +
> +fail:
> +	if (ar->rx_thread_enable)
> +		ath10k_core_thread_resume(&ar->rx_thread);
> +
> +	return ret;
>   }
>   
>   static int ath10k_snoc_hif_resume(struct ath10k *ar)
> @@ -1158,6 +1191,15 @@ static int ath10k_snoc_hif_resume(struct ath10k *ar)
>   		return ret;
>   	}
>   
> +	if (ar->rx_thread_enable) {
> +		ret = ath10k_core_thread_resume(&ar->rx_thread);
> +		if (ret) {
> +			ath10k_err(ar, "failed to suspend rx_thread, %d\n",
> +				   ret);
> +			return ret;
> +		}
> +	}
> +
>   	ath10k_dbg(ar, ATH10K_DBG_SNOC, "snoc device resumed\n");
>   
>   	return ret;

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  reply	other threads:[~2020-07-23 23:06 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 in thread 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 ` [RFC 2/7] ath10k: Add support to process rx packet in thread Rakesh Pillai
2020-07-21 17:14   ` 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 [this message]
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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