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List:       linux-wireless
Subject:    [PATCH 06/10] wil6210: add statistics for suspend time
From:       Maya Erez <qca_merez () qca ! qualcomm ! com>
Date:       2017-07-31 16:32:29
Message-ID: 1501518753-6339-7-git-send-email-qca_merez () qca ! qualcomm ! com
[Download RAW message or body]

Add statistics for total, min and max suspend time, that
calculates the time the 11ad device was in suspend.
Those statistics will help to estimate the power impact
of d3hot feature.

Signed-off-by: Maya Erez <qca_merez@qca.qualcomm.com>
---
 drivers/net/wireless/ath/wil6210/debugfs.c | 17 +++++++++++++++--
 drivers/net/wireless/ath/wil6210/main.c    |  2 ++
 drivers/net/wireless/ath/wil6210/pm.c      | 20 ++++++++++++++++++--
 drivers/net/wireless/ath/wil6210/wil6210.h |  5 +++++
 4 files changed, 40 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/ath/wil6210/debugfs.c b/drivers/net/wireless/ath/wil6210/debugfs.c
index 8a0e64c..97d79a9 100644
--- a/drivers/net/wireless/ath/wil6210/debugfs.c
+++ b/drivers/net/wireless/ath/wil6210/debugfs.c
@@ -1669,6 +1669,8 @@ static ssize_t wil_write_suspend_stats(struct file *file,
 	struct wil6210_priv *wil = file->private_data;
 
 	memset(&wil->suspend_stats, 0, sizeof(wil->suspend_stats));
+	wil->suspend_stats.min_suspend_time = ULONG_MAX;
+	wil->suspend_stats.collection_start = ktime_get();
 
 	return len;
 }
@@ -1680,18 +1682,27 @@ static ssize_t wil_read_suspend_stats(struct file *file,
 	struct wil6210_priv *wil = file->private_data;
 	static char text[400];
 	int n;
+	unsigned long long stats_collection_time =
+		ktime_to_us(ktime_sub(ktime_get(),
+				      wil->suspend_stats.collection_start));
 
 	n = snprintf(text, sizeof(text),
 		     "Suspend statistics:\n"
 		     "successful suspends:%ld failed suspends:%ld\n"
 		     "successful resumes:%ld failed resumes:%ld\n"
-		     "rejected by host:%ld rejected by device:%ld\n",
+		     "rejected by host:%ld rejected by device:%ld\n"
+		     "total suspend time:%lld min suspend time:%lld\n"
+		     "max suspend time:%lld stats collection time: %lld\n",
 		     wil->suspend_stats.successful_suspends,
 		     wil->suspend_stats.failed_suspends,
 		     wil->suspend_stats.successful_resumes,
 		     wil->suspend_stats.failed_resumes,
 		     wil->suspend_stats.rejected_by_host,
-		     wil->suspend_stats.rejected_by_device);
+		     wil->suspend_stats.rejected_by_device,
+		     wil->suspend_stats.total_suspend_time,
+		     wil->suspend_stats.min_suspend_time,
+		     wil->suspend_stats.max_suspend_time,
+		     stats_collection_time);
 
 	n = min_t(int, n, sizeof(text));
 
@@ -1864,6 +1875,8 @@ int wil6210_debugfs_init(struct wil6210_priv *wil)
 
 	wil6210_debugfs_create_ITR_CNT(wil, dbg);
 
+	wil->suspend_stats.collection_start = ktime_get();
+
 	return 0;
 }
 
diff --git a/drivers/net/wireless/ath/wil6210/main.c b/drivers/net/wireless/ath/wil6210/main.c
index daf944a..8968c2c 100644
--- a/drivers/net/wireless/ath/wil6210/main.c
+++ b/drivers/net/wireless/ath/wil6210/main.c
@@ -578,6 +578,8 @@ int wil_priv_init(struct wil6210_priv *wil)
 
 	wil->wakeup_trigger = WMI_WAKEUP_TRIGGER_UCAST |
 			      WMI_WAKEUP_TRIGGER_BCAST;
+	memset(&wil->suspend_stats, 0, sizeof(wil->suspend_stats));
+	wil->suspend_stats.min_suspend_time = ULONG_MAX;
 
 	return 0;
 
diff --git a/drivers/net/wireless/ath/wil6210/pm.c b/drivers/net/wireless/ath/wil6210/pm.c
index 976c9aa..4a18f8e 100644
--- a/drivers/net/wireless/ath/wil6210/pm.c
+++ b/drivers/net/wireless/ath/wil6210/pm.c
@@ -321,6 +321,9 @@ int wil_suspend(struct wil6210_priv *wil, bool is_runtime)
 	wil_dbg_pm(wil, "suspend: %s => %d\n",
 		   is_runtime ? "runtime" : "system", rc);
 
+	if (!rc)
+		wil->suspend_stats.suspend_start_time = ktime_get();
+
 	return rc;
 }
 
@@ -330,6 +333,7 @@ int wil_resume(struct wil6210_priv *wil, bool is_runtime)
 	struct net_device *ndev = wil_to_ndev(wil);
 	bool keep_radio_on = ndev->flags & IFF_UP &&
 			     wil->keep_radio_on_during_sleep;
+	unsigned long long suspend_time_usec = 0;
 
 	wil_dbg_pm(wil, "resume: %s\n", is_runtime ? "runtime" : "system");
 
@@ -347,9 +351,21 @@ int wil_resume(struct wil6210_priv *wil, bool is_runtime)
 	else
 		rc = wil_resume_radio_off(wil);
 
+	if (rc)
+		goto out;
+
+	suspend_time_usec =
+		ktime_to_us(ktime_sub(ktime_get(),
+				      wil->suspend_stats.suspend_start_time));
+	wil->suspend_stats.total_suspend_time += suspend_time_usec;
+	if (suspend_time_usec < wil->suspend_stats.min_suspend_time)
+		wil->suspend_stats.min_suspend_time = suspend_time_usec;
+	if (suspend_time_usec > wil->suspend_stats.max_suspend_time)
+		wil->suspend_stats.max_suspend_time = suspend_time_usec;
+
 out:
-	wil_dbg_pm(wil, "resume: %s => %d\n",
-		   is_runtime ? "runtime" : "system", rc);
+	wil_dbg_pm(wil, "resume: %s => %d, suspend time %lld usec\n",
+		   is_runtime ? "runtime" : "system", rc, suspend_time_usec);
 	return rc;
 }
 
diff --git a/drivers/net/wireless/ath/wil6210/wil6210.h b/drivers/net/wireless/ath/wil6210/wil6210.h
index 69103b0..f1488299 100644
--- a/drivers/net/wireless/ath/wil6210/wil6210.h
+++ b/drivers/net/wireless/ath/wil6210/wil6210.h
@@ -90,6 +90,11 @@ struct wil_suspend_stats {
 	unsigned long failed_resumes;
 	unsigned long rejected_by_device;
 	unsigned long rejected_by_host;
+	unsigned long long total_suspend_time;
+	unsigned long long min_suspend_time;
+	unsigned long long max_suspend_time;
+	ktime_t collection_start;
+	ktime_t suspend_start_time;
 };
 
 /* Calculate MAC buffer size for the firmware. It includes all overhead,
-- 
1.9.1

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