CHROMIUM: ath10k: add debugfs support for burst mode configuration

This patch adds debugfs support for configuring burst mode to enable
or disable.

f.e,
echo "val" > /sys/kernel/debug/ieee80211/phyX/ath10k/burst_enable
Where disable: val = 0.
      enable : val = 1.

BUG=b:137147192
TEST=1. build image
     2. verify /sys/kernel/debug/ieee80211/phyX/ath10k/burst_enable
        for values set.

Change-Id: Ib5eb4cb9e9358dd2a533b9e6095ed050a184a813
Signed-off-by: Balaji Pothunoori <bpothuno@codeaurora.org>
Signed-off-by: Vamsi Singamsetty <vamssi@codeaurora.org>
Signed-off-by: Mayank Chopra <mak.chopra@codeaurora.org>
Reviewed-on: https://chromium-review.googlesource.com/1739068
Tested-by: Julan Hsu <julanhsu@google.com>
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Kan Yan <kyan@chromium.org>

2 files changed, 68 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index d5d2ac848c5a..e9480871ce7d 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -1172,6 +1172,8 @@ struct ath10k {
 
 	const unsigned int *debug_mask;
 	u32	atf_max_num_pending_tx;
+	bool burst_enabled;
+
 	/* must be last */
 	u8 drv_priv[0] __aligned(sizeof(void *));
 };
diff --git a/drivers/net/wireless/ath/ath10k/debug.c b/drivers/net/wireless/ath/ath10k/debug.c
index 5b9d86a3746f..a9f8c7b5c8f8 100644
--- a/drivers/net/wireless/ath/ath10k/debug.c
+++ b/drivers/net/wireless/ath/ath10k/debug.c
@@ -3257,6 +3257,69 @@ static const struct file_operations fops_rts_threshold = {
 	.llseek = default_llseek,
 };
 
+static ssize_t ath10k_write_burst_enable(struct file *file,
+					 const char __user *user_buf,
+					 size_t count, loff_t *ppos)
+{
+	struct ath10k *ar = file->private_data;
+	int ret;
+	u8 enable;
+
+	if (kstrtou8_from_user(user_buf, count, 0, &enable))
+		return -EINVAL;
+
+	mutex_lock(&ar->conf_mutex);
+
+	if (ar->burst_enabled == enable) {
+		ret = count;
+		goto exit;
+	}
+
+	if (ar->state != ATH10K_STATE_ON &&
+	    ar->state != ATH10K_STATE_RESTARTED) {
+		ret = -ENETDOWN;
+		goto exit;
+	}
+
+	ret = ath10k_wmi_pdev_set_param(ar, ar->wmi.pdev_param->burst_enable,
+					enable);
+
+	if (ret) {
+		ath10k_warn(ar, "failed to set burst value %d\n",
+			    ret);
+		goto exit;
+	}
+	ar->burst_enabled = enable;
+
+	ret = count;
+
+exit:
+	mutex_unlock(&ar->conf_mutex);
+
+	return ret;
+}
+
+static ssize_t ath10k_read_burst_enable(struct file *file,
+					char __user *user_buf,
+					size_t count, loff_t *ppos)
+{
+	struct ath10k *ar = file->private_data;
+	size_t len;
+	char buf[32];
+
+	len = scnprintf(buf, sizeof(buf), "%d\n", ar->burst_enabled);
+
+	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
+}
+
+static const struct file_operations fops_burst_enable = {
+	.read = ath10k_read_burst_enable,
+	.write = ath10k_write_burst_enable,
+	.open = simple_open,
+	.owner = THIS_MODULE,
+	.llseek = default_llseek,
+};
+
 int ath10k_debug_register(struct ath10k *ar)
 {
 	ar->debug.debugfs_phy = debugfs_create_dir("ath10k",
@@ -3391,6 +3454,9 @@ int ath10k_debug_register(struct ath10k *ar)
 	debugfs_create_file("rts_threshold", 0600,
 			    ar->debug.debugfs_phy, ar, &fops_rts_threshold);
 
+	debugfs_create_file("burst_enable", 0600, ar->debug.debugfs_phy, ar,
+			    &fops_burst_enable);
+
 	ath10k_txdelay_debugfs_register(ar);
 
 	return 0;