wifi: ath12k: Add support to enable debugfs_htt_stats

Create debugfs_htt_stats file when ath12k debugfs support is enabled.
Add basic ath12k_debugfs_htt_stats_register and handle htt_stats_type
file operations.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1
Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3

Signed-off-by: Dinesh Karthikeyan <quic_dinek@quicinc.com>
Co-developed-by: Ramya Gnanasekar <quic_rgnanase@quicinc.com>
Signed-off-by: Ramya Gnanasekar <quic_rgnanase@quicinc.com>
Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://patch.msgid.link/20240626085854.2500681-2-quic_rgnanase@quicinc.com

drivers/net/wireless/ath/ath12k/Makefile

@@ -23,7 +23,7 @@ ath12k-y += core.o \
 	    fw.o \
 	    p2p.o
 
-ath12k-$(CONFIG_ATH12K_DEBUGFS) += debugfs.o
+ath12k-$(CONFIG_ATH12K_DEBUGFS) += debugfs.o debugfs_htt_stats.o
 ath12k-$(CONFIG_ACPI) += acpi.o
 ath12k-$(CONFIG_ATH12K_TRACING) += trace.o
 ath12k-$(CONFIG_PM) += wow.o

drivers/net/wireless/ath/ath12k/core.h

@@ -29,6 +29,7 @@
 #include "fw.h"
 #include "acpi.h"
 #include "wow.h"
+#include "debugfs_htt_stats.h"
 
 #define SM(_v, _f) (((_v) << _f##_LSB) & _f##_MASK)
 
@@ -481,9 +482,15 @@ struct ath12k_fw_stats {
 	struct list_head bcn;
 };
 
+struct ath12k_dbg_htt_stats {
+	enum ath12k_dbg_htt_ext_stats_type type;
+	u32 cfg_param[4];
+};
+
 struct ath12k_debug {
 	struct dentry *debugfs_pdev;
 	struct dentry *debugfs_pdev_symlink;
+	struct ath12k_dbg_htt_stats htt_stats;
 };
 
 struct ath12k_per_peer_tx_stats {

drivers/net/wireless/ath/ath12k/debugfs.c

@@ -6,6 +6,7 @@
 
 #include "core.h"
 #include "debugfs.h"
+#include "debugfs_htt_stats.h"
 
 static ssize_t ath12k_write_simulate_radar(struct file *file,
 					   const char __user *user_buf,
@@ -89,6 +90,8 @@ void ath12k_debugfs_register(struct ath12k *ar)
 				    ar->debug.debugfs_pdev, ar,
 				    &fops_simulate_radar);
 	}
+
+	ath12k_debugfs_htt_stats_register(ar);
 }
 
 void ath12k_debugfs_unregister(struct ath12k *ar)

drivers/net/wireless/ath/ath12k/debugfs_htt_stats.c

@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: BSD-3-Clause-Clear
+/*
+ * Copyright (c) 2018-2021 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2021-2024 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#include <linux/vmalloc.h>
+#include "core.h"
+#include "debug.h"
+#include "debugfs_htt_stats.h"
+
+static ssize_t ath12k_read_htt_stats_type(struct file *file,
+					  char __user *user_buf,
+					  size_t count, loff_t *ppos)
+{
+	struct ath12k *ar = file->private_data;
+	enum ath12k_dbg_htt_ext_stats_type type;
+	char buf[32];
+	size_t len;
+
+	mutex_lock(&ar->conf_mutex);
+	type = ar->debug.htt_stats.type;
+	mutex_unlock(&ar->conf_mutex);
+
+	len = scnprintf(buf, sizeof(buf), "%u\n", type);
+
+	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
+}
+
+static ssize_t ath12k_write_htt_stats_type(struct file *file,
+					   const char __user *user_buf,
+					   size_t count, loff_t *ppos)
+{
+	struct ath12k *ar = file->private_data;
+	enum ath12k_dbg_htt_ext_stats_type type;
+	unsigned int cfg_param[4] = {0};
+	const int size = 32;
+	int num_args;
+
+	char *buf __free(kfree) = kzalloc(size, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	if (copy_from_user(buf, user_buf, count))
+		return -EFAULT;
+
+	num_args = sscanf(buf, "%u %u %u %u %u\n", &type, &cfg_param[0],
+			  &cfg_param[1], &cfg_param[2], &cfg_param[3]);
+	if (!num_args || num_args > 5)
+		return -EINVAL;
+
+	if (type == ATH12K_DBG_HTT_EXT_STATS_RESET ||
+	    type >= ATH12K_DBG_HTT_NUM_EXT_STATS)
+		return -EINVAL;
+
+	mutex_lock(&ar->conf_mutex);
+
+	ar->debug.htt_stats.type = type;
+	ar->debug.htt_stats.cfg_param[0] = cfg_param[0];
+	ar->debug.htt_stats.cfg_param[1] = cfg_param[1];
+	ar->debug.htt_stats.cfg_param[2] = cfg_param[2];
+	ar->debug.htt_stats.cfg_param[3] = cfg_param[3];
+
+	mutex_unlock(&ar->conf_mutex);
+
+	return count;
+}
+
+static const struct file_operations fops_htt_stats_type = {
+	.read = ath12k_read_htt_stats_type,
+	.write = ath12k_write_htt_stats_type,
+	.open = simple_open,
+	.owner = THIS_MODULE,
+	.llseek = default_llseek,
+};
+
+void ath12k_debugfs_htt_stats_register(struct ath12k *ar)
+{
+	debugfs_create_file("htt_stats_type", 0600, ar->debug.debugfs_pdev,
+			    ar, &fops_htt_stats_type);
+}

drivers/net/wireless/ath/ath12k/debugfs_htt_stats.h

@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: BSD-3-Clause-Clear */
+/*
+ * Copyright (c) 2018-2021 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2021-2024 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#ifndef DEBUG_HTT_STATS_H
+#define DEBUG_HTT_STATS_H
+
+void ath12k_debugfs_htt_stats_register(struct ath12k *ar);
+
+/* htt_dbg_ext_stats_type */
+enum ath12k_dbg_htt_ext_stats_type {
+	ATH12K_DBG_HTT_EXT_STATS_RESET		= 0,
+
+	/* keep this last */
+	ATH12K_DBG_HTT_NUM_EXT_STATS,
+};
+
+#endif