ath10k: add log level configuration for fw_dbglog

Introduce an optional log level configuration for the existing debugfs fw_dbglog file. It
allows users to configure the desired log level for firmware dbglog messages.

To configure log level as WARN:

echo 0xffffffff  2 > /sys/kernel/debug/ieee80211/phy0/ath10k/fw_dbglog

The values are:

VERBOSE		0
INFO		1
WARN		2
ERR		3

Signed-off-by: SenthilKumar Jegadeesan <sjegadee@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

5 files changed, 33 insertions, 16 deletions

diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index c8ba6bd4b968..d60e46fe6d19 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -350,6 +350,7 @@ struct ath10k_debug {
 
         /* protected by conf_mutex */
         u32 fw_dbglog_mask;
+        u32 fw_dbglog_level;
         u32 pktlog_filter;
         u32 reg_addr;
         u32 nf_cal_period;
diff --git a/drivers/net/wireless/ath/ath10k/debug.c b/drivers/net/wireless/ath/ath10k/debug.c
index 42b2e49b2836..d2281e5c2ffe 100644
--- a/drivers/net/wireless/ath/ath10k/debug.c
+++ b/drivers/net/wireless/ath/ath10k/debug.c
@@ -1318,10 +1318,10 @@ static ssize_t ath10k_read_fw_dbglog(struct file *file,
 {
         struct ath10k *ar = file->private_data;
         unsigned int len;
-        char buf[32];
+        char buf[64];
 
-        len = scnprintf(buf, sizeof(buf), "0x%08x\n",
-                        ar->debug.fw_dbglog_mask);
+        len = scnprintf(buf, sizeof(buf), "0x%08x %u\n",
+                        ar->debug.fw_dbglog_mask, ar->debug.fw_dbglog_level);
 
         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 }
@@ -1331,19 +1331,32 @@ static ssize_t ath10k_write_fw_dbglog(struct file *file,
                                       size_t count, loff_t *ppos)
 {
         struct ath10k *ar = file->private_data;
-        unsigned long mask;
         int ret;
+        char buf[64];
+        unsigned int log_level, mask;
 
-        ret = kstrtoul_from_user(user_buf, count, 0, &mask);
-        if (ret)
-                return ret;
+        simple_write_to_buffer(buf, sizeof(buf) - 1, ppos, user_buf, count);
+
+        /* make sure that buf is null terminated */
+        buf[sizeof(buf) - 1] = 0;
+
+        ret = sscanf(buf, "%x %u", &mask, &log_level);
+
+        if (!ret)
+                return -EINVAL;
+
+        if (ret == 1)
+                /* default if user did not specify */
+                log_level = ATH10K_DBGLOG_LEVEL_WARN;
 
         mutex_lock(&ar->conf_mutex);
 
         ar->debug.fw_dbglog_mask = mask;
+        ar->debug.fw_dbglog_level = log_level;
 
         if (ar->state == ATH10K_STATE_ON) {
-                ret = ath10k_wmi_dbglog_cfg(ar, ar->debug.fw_dbglog_mask);
+                ret = ath10k_wmi_dbglog_cfg(ar, ar->debug.fw_dbglog_mask,
+                                            ar->debug.fw_dbglog_level);
                 if (ret) {
                         ath10k_warn(ar, "dbglog cfg failed from debugfs: %d\n",
                                     ret);
@@ -1685,7 +1698,8 @@ int ath10k_debug_start(struct ath10k *ar)
                             ret);
 
         if (ar->debug.fw_dbglog_mask) {
-                ret = ath10k_wmi_dbglog_cfg(ar, ar->debug.fw_dbglog_mask);
+                ret = ath10k_wmi_dbglog_cfg(ar, ar->debug.fw_dbglog_mask,
+                                            ATH10K_DBGLOG_LEVEL_WARN);
                 if (ret)
                         /* not serious */
                         ath10k_warn(ar, "failed to enable dbglog during start: %d",
diff --git a/drivers/net/wireless/ath/ath10k/wmi-ops.h b/drivers/net/wireless/ath/ath10k/wmi-ops.h
index de436162a805..04dc4b9db04e 100644
--- a/drivers/net/wireless/ath/ath10k/wmi-ops.h
+++ b/drivers/net/wireless/ath/ath10k/wmi-ops.h
@@ -116,7 +116,8 @@ struct wmi_ops {
                                              enum wmi_force_fw_hang_type type,
                                              u32 delay_ms);
         struct sk_buff *(*gen_mgmt_tx)(struct ath10k *ar, struct sk_buff *skb);
-        struct sk_buff *(*gen_dbglog_cfg)(struct ath10k *ar, u32 module_enable);
+        struct sk_buff *(*gen_dbglog_cfg)(struct ath10k *ar, u32 module_enable,
+                                          u32 log_level);
         struct sk_buff *(*gen_pktlog_enable)(struct ath10k *ar, u32 filter);
         struct sk_buff *(*gen_pktlog_disable)(struct ath10k *ar);
         struct sk_buff *(*gen_pdev_set_quiet_mode)(struct ath10k *ar,
@@ -846,14 +847,14 @@ ath10k_wmi_force_fw_hang(struct ath10k *ar,
 }
 
 static inline int
-ath10k_wmi_dbglog_cfg(struct ath10k *ar, u32 module_enable)
+ath10k_wmi_dbglog_cfg(struct ath10k *ar, u32 module_enable, u32 log_level)
 {
         struct sk_buff *skb;
 
         if (!ar->wmi.ops->gen_dbglog_cfg)
                 return -EOPNOTSUPP;
 
-        skb = ar->wmi.ops->gen_dbglog_cfg(ar, module_enable);
+        skb = ar->wmi.ops->gen_dbglog_cfg(ar, module_enable, log_level);
         if (IS_ERR(skb))
                 return PTR_ERR(skb);
 
diff --git a/drivers/net/wireless/ath/ath10k/wmi-tlv.c b/drivers/net/wireless/ath/ath10k/wmi-tlv.c
index ba78c187976c..71614ba1b145 100644
--- a/drivers/net/wireless/ath/ath10k/wmi-tlv.c
+++ b/drivers/net/wireless/ath/ath10k/wmi-tlv.c
@@ -2126,8 +2126,8 @@ ath10k_wmi_tlv_op_gen_force_fw_hang(struct ath10k *ar,
 }
 
 static struct sk_buff *
-ath10k_wmi_tlv_op_gen_dbglog_cfg(struct ath10k *ar, u32 module_enable)
-{
+ath10k_wmi_tlv_op_gen_dbglog_cfg(struct ath10k *ar, u32 module_enable,
+                                 u32 log_level) {
         struct wmi_tlv_dbglog_cmd *cmd;
         struct wmi_tlv *tlv;
         struct sk_buff *skb;
diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c
index d6c5b423b836..fd213d9e4214 100644
--- a/drivers/net/wireless/ath/ath10k/wmi.c
+++ b/drivers/net/wireless/ath/ath10k/wmi.c
@@ -4991,7 +4991,8 @@ ath10k_wmi_op_gen_force_fw_hang(struct ath10k *ar,
 }
 
 static struct sk_buff *
-ath10k_wmi_op_gen_dbglog_cfg(struct ath10k *ar, u32 module_enable)
+ath10k_wmi_op_gen_dbglog_cfg(struct ath10k *ar, u32 module_enable,
+                             u32 log_level)
 {
         struct wmi_dbglog_cfg_cmd *cmd;
         struct sk_buff *skb;
@@ -5004,7 +5005,7 @@ ath10k_wmi_op_gen_dbglog_cfg(struct ath10k *ar, u32 module_enable)
         cmd = (struct wmi_dbglog_cfg_cmd *)skb->data;
 
         if (module_enable) {
-                cfg = SM(ATH10K_DBGLOG_LEVEL_VERBOSE,
+                cfg = SM(log_level,
                          ATH10K_DBGLOG_CFG_LOG_LVL);
         } else {
                 /* set back defaults, all modules with WARN level */