qcacld-3.0: use debugfs to show ini configs

Create the debugfs interface to show the ini configs.
Usage: cat /sys/kernel/debug/wlan/ini_config

Change-Id: I2c6aeeaae6d79739bb8ab82740e8be678c18fd89
CRs-Fixed: 2572142

Kbuild

@@ -105,6 +105,7 @@ HDD_OBJS += $(HDD_SRC_DIR)/wlan_hdd_debugfs_csr.o
 HDD_OBJS += $(HDD_SRC_DIR)/wlan_hdd_debugfs_connect.o
 HDD_OBJS += $(HDD_SRC_DIR)/wlan_hdd_debugfs_offload.o
 HDD_OBJS += $(HDD_SRC_DIR)/wlan_hdd_debugfs_roam.o
+HDD_OBJS += $(HDD_SRC_DIR)/wlan_hdd_debugfs_config.o
 ifeq ($(CONFIG_WLAN_MWS_INFO_DEBUGFS), y)
 HDD_OBJS += $(HDD_SRC_DIR)/wlan_hdd_debugfs_coex.o
 endif

core/hdd/inc/wlan_hdd_debugfs_config.h

@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2019 The Linux Foundation. All rights reserved.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for
+ * any purpose with or without fee is hereby granted, provided that the
+ * above copyright notice and this permission notice appear in all
+ * copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
+ * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/**
+ * DOC: wlan_hdd_debugfs_config.h
+ *
+ * WLAN Host Device Driver implementation to update
+ * debugfs with ini configs
+ */
+
+#ifndef _WLAN_HDD_DEBUGFS_CONFIG_H
+#define _WLAN_HDD_DEBUGFS_CONFIG_H
+
+#ifdef WLAN_DEBUGFS
+/**
+ * hdd_debugfs_ini_config_init() - API to initialize ini config file
+ * @hdd_ctx: hdd context
+ *
+ * Return: 0 on success and errno on failure
+ */
+int hdd_debugfs_ini_config_init(struct hdd_context *hdd_ctx);
+
+/**
+ * hdd_debugfs_ini_config_deinit() - API to deinit ini config file
+ * @hdd_ctx: hdd context
+ *
+ * Return: None
+ */
+void hdd_debugfs_ini_config_deinit(struct hdd_context *hdd_ctx);
+#else
+static inline int hdd_debugfs_ini_config_init(struct hdd_context *hdd_ctx)
+{
+	return 0;
+}
+
+static inline void hdd_debugfs_ini_config_deinit(struct hdd_context *hdd_ctx)
+{
+}
+#endif /* WLAN_DEBUGFS */
+#endif /* _WLAN_HDD_DEBUGFS_CONFIG_H */

core/hdd/src/wlan_hdd_debugfs_config.c

@@ -0,0 +1,240 @@
+/*
+ * Copyright (c) 2019 The Linux Foundation. All rights reserved.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for
+ * any purpose with or without fee is hereby granted, provided that the
+ * above copyright notice and this permission notice appear in all
+ * copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
+ * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/**
+ * DOC: wlan_hdd_debugfs_config.c
+ *
+ * WLAN Host Device Driver implementation to update
+ * debugfs with ini configs
+ */
+
+#include "wlan_hdd_main.h"
+#include "osif_psoc_sync.h"
+#include "cfg_ucfg_api.h"
+#include "wlan_hdd_debugfs_config.h"
+
+#define DEBUGFS_CONFIG_BUF_SIZE (4096 * 8)
+
+/**
+ * struct ini_config_buf - the buffer struct to save ini configs
+ * @len: buffer len
+ * @result: the pointer to buffer
+ */
+struct ini_config_buf {
+	ssize_t len;
+	uint8_t result[DEBUGFS_CONFIG_BUF_SIZE];
+};
+
+/**
+ * wlan_hdd_config_update() - Update userspace with local statistics buffer
+ * @buf: userspace buffer (to which data is being copied into)
+ * @count: max data that can be copied into buf
+ * @pos: offset (where data should be copied into)
+ * @ini_config: buffer structure for ini config info
+ *
+ * This function should copies ini configs into debugfs entry.
+ *
+ * Return: number of characters copied; 0 on no-copy
+ */
+static ssize_t wlan_hdd_config_update(char __user *buf, size_t count,
+				      loff_t *pos,
+				      struct ini_config_buf *ini_config)
+{
+	ssize_t ret_cnt;
+
+	ret_cnt = simple_read_from_buffer(buf, count, pos, ini_config->result,
+					  ini_config->len);
+	hdd_debug("ini config read req: count: %zu, pos: %lld", count, *pos);
+
+	return ret_cnt;
+}
+
+/**
+ * wlan_hdd_config_get() - Function to save ini config to buffer
+ * @hdd_ctx: hdd context used to register the debugfs file
+ * @ini_config: buffer structure for ini config info
+ *
+ * Return: Errno
+ */
+static int wlan_hdd_config_get(struct hdd_context *hdd_ctx,
+			       struct ini_config_buf *ini_config)
+{
+	QDF_STATUS status;
+
+	status = ucfg_cfg_ini_config_print(hdd_ctx->psoc, ini_config->result,
+					   &ini_config->len,
+					   DEBUGFS_CONFIG_BUF_SIZE);
+	return qdf_status_to_os_return(status);
+}
+
+/**
+ * __wlan_hdd_read_config_debugfs() - function to get ini conifg
+ * @file: file pointer
+ * @buf: buffer
+ * @count: count
+ * @pos: position pointer
+ *
+ * Return: Number of bytes read on success, error number otherwise
+ */
+static ssize_t __wlan_hdd_read_config_debugfs(struct file *file,
+					      char __user *buf, size_t count,
+					      loff_t *pos)
+{
+	struct ini_config_buf *ini_config;
+	ssize_t err_size;
+
+	ini_config = (struct ini_config_buf *)file->private_data;
+	if (!ini_config)
+		return -ENOMEM;
+
+	err_size = wlan_hdd_config_update(buf, count, pos, ini_config);
+
+	return err_size;
+}
+
+/**
+ * wlan_hdd_read_config_debugfs() - wrapper function to get ini conifg
+ * @file: file pointer
+ * @buf: buffer
+ * @count: count
+ * @pos: position pointer
+ *
+ * Return: Number of bytes read on success, error number otherwise
+ */
+static ssize_t wlan_hdd_read_config_debugfs(struct file *file,
+					    char __user *buf, size_t count,
+					    loff_t *pos)
+{
+	struct hdd_context *hdd_ctx = file_inode(file)->i_private;
+	struct osif_psoc_sync *psoc_sync;
+	ssize_t err_size;
+
+	err_size = wlan_hdd_validate_context(hdd_ctx);
+	if (err_size)
+		return err_size;
+
+	err_size = osif_psoc_sync_op_start(wiphy_dev(hdd_ctx->wiphy),
+					   &psoc_sync);
+	if (err_size)
+		return err_size;
+
+	err_size = __wlan_hdd_read_config_debugfs(file, buf, count, pos);
+
+	osif_psoc_sync_op_stop(psoc_sync);
+
+	return err_size;
+}
+
+/**
+ * __wlan_hdd_open_config_debugfs() - function to open config debugfs
+ * @inode: Pointer to inode structure
+ * @file: file pointer
+ *
+ * Return: Errno
+ */
+static int __wlan_hdd_open_config_debugfs(struct inode *inode,
+					  struct file *file)
+{
+	struct hdd_context *hdd_ctx = file_inode(file)->i_private;
+	struct ini_config_buf *ini_config;
+	ssize_t errno;
+	void *buf;
+
+	buf = qdf_mem_malloc(sizeof(*ini_config));
+	if (!buf)
+		return -ENOMEM;
+
+	ini_config = (struct ini_config_buf *)buf;
+	errno = wlan_hdd_config_get(hdd_ctx, ini_config);
+	if (errno) {
+		qdf_mem_free(buf);
+		return errno;
+	}
+
+	file->private_data = buf;
+	return 0;
+}
+
+/**
+ * wlan_hdd_open_config_debugfs() - wrapper function to open config debugfs
+ * @inode: Pointer to inode structure
+ * @file: file pointer
+ *
+ * Return: Errno
+ */
+static int wlan_hdd_open_config_debugfs(struct inode *inode, struct file *file)
+{
+	struct hdd_context *hdd_ctx = file_inode(file)->i_private;
+	struct osif_psoc_sync *psoc_sync;
+	ssize_t errno;
+
+	errno = wlan_hdd_validate_context(hdd_ctx);
+	if (errno)
+		return errno;
+
+	errno = osif_psoc_sync_op_start(wiphy_dev(hdd_ctx->wiphy),
+					&psoc_sync);
+	if (errno)
+		return errno;
+
+	errno = __wlan_hdd_open_config_debugfs(inode, file);
+
+	osif_psoc_sync_op_stop(psoc_sync);
+	return errno;
+}
+
+/**
+ * wlan_hdd_release_config_debugfs() - wrapper to release
+ * @inode: Pointer to inode structure
+ * @file: file pointer
+ *
+ * Return: Errno
+ */
+static int wlan_hdd_release_config_debugfs(struct inode *inode,
+					   struct file *file)
+{
+	qdf_mem_free(file->private_data);
+	file->private_data = NULL;
+
+	return 0;
+}
+
+static const struct file_operations fops_config_debugfs = {
+	.read = wlan_hdd_read_config_debugfs,
+	.open = wlan_hdd_open_config_debugfs,
+	.release = wlan_hdd_release_config_debugfs,
+	.owner = THIS_MODULE,
+	.llseek = default_llseek,
+};
+
+int hdd_debugfs_ini_config_init(struct hdd_context *hdd_ctx)
+{
+	if (!debugfs_create_file("ini_config", 0444, qdf_debugfs_get_root(),
+				 hdd_ctx, &fops_config_debugfs))
+		return -EINVAL;
+
+	return 0;
+}
+
+void hdd_debugfs_ini_config_deinit(struct hdd_context *hdd_ctx)
+{
+	/*
+	 * Config ini doesn't have a directory it is removed
+	 * as part of qdf remove
+	 */
+}

core/hdd/src/wlan_hdd_main.c

@@ -170,6 +170,7 @@
 #include <wlan_interop_issues_ap_ucfg_api.h>
 #include <target_type.h>
 #include <wlan_hdd_debugfs_coex.h>
+#include <wlan_hdd_debugfs_config.h>
 #include "wlan_blm_ucfg_api.h"
 #include "ol_txrx.h"
 #include "wlan_hdd_sta_info.h"
@@ -7724,6 +7725,7 @@ void hdd_wlan_exit(struct hdd_context *hdd_ctx)
 
 	hdd_enter();
 
+	hdd_debugfs_ini_config_deinit(hdd_ctx);
 	hdd_debugfs_mws_coex_info_deinit(hdd_ctx);
 	hdd_psoc_idle_timer_stop(hdd_ctx);
 
@@ -12751,6 +12753,7 @@ int hdd_wlan_startup(struct hdd_context *hdd_ctx)
 	ucfg_mlme_is_imps_enabled(hdd_ctx->psoc, &is_imps_enabled);
 	hdd_set_idle_ps_config(hdd_ctx, is_imps_enabled);
 	hdd_debugfs_mws_coex_info_init(hdd_ctx);
+	hdd_debugfs_ini_config_init(hdd_ctx);
 	wlan_cfg80211_init_interop_issues_ap(hdd_ctx->pdev);
 
 	hdd_exit();