icnss: Add ICNSS utility file

Add ICNSS utility file, which provides APIs for getting/setting
WLAN DFS channels.

CRs-Fixed: 1060783
Change-Id: Iae89ce7b26453f9a0ff3214bd5598ee11e181857
Signed-off-by: Yuanyuan Liu <yuanliu@codeaurora.org>

1 files changed, 132 insertions, 0 deletions

diff --git a/drivers/soc/qcom/icnss_utils.c b/drivers/soc/qcom/icnss_utils.c
new file mode 100644
index 000000000000..5e187d5df8b3
--- /dev/null
+++ b/drivers/soc/qcom/icnss_utils.c
@@ -0,0 +1,132 @@
+/* Copyright (c) 2016, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#define ICNSS_MAX_CH_NUM 45
+
+static DEFINE_MUTEX(unsafe_channel_list_lock);
+static DEFINE_MUTEX(dfs_nol_info_lock);
+
+static struct icnss_unsafe_channel_list {
+	u16 unsafe_ch_count;
+	u16 unsafe_ch_list[ICNSS_MAX_CH_NUM];
+} unsafe_channel_list;
+
+static struct icnss_dfs_nol_info {
+	void *dfs_nol_info;
+	u16 dfs_nol_info_len;
+} dfs_nol_info;
+
+int icnss_set_wlan_unsafe_channel(u16 *unsafe_ch_list, u16 ch_count)
+{
+	mutex_lock(&unsafe_channel_list_lock);
+	if ((!unsafe_ch_list) || (ch_count > ICNSS_MAX_CH_NUM)) {
+		mutex_unlock(&unsafe_channel_list_lock);
+		return -EINVAL;
+	}
+
+	unsafe_channel_list.unsafe_ch_count = ch_count;
+
+	if (ch_count != 0) {
+		memcpy(
+		       (char *)unsafe_channel_list.unsafe_ch_list,
+		       (char *)unsafe_ch_list, ch_count * sizeof(u16));
+	}
+	mutex_unlock(&unsafe_channel_list_lock);
+
+	return 0;
+}
+EXPORT_SYMBOL(icnss_set_wlan_unsafe_channel);
+
+int icnss_get_wlan_unsafe_channel(u16 *unsafe_ch_list,
+				  u16 *ch_count, u16 buf_len)
+{
+	mutex_lock(&unsafe_channel_list_lock);
+	if (!unsafe_ch_list || !ch_count) {
+		mutex_unlock(&unsafe_channel_list_lock);
+		return -EINVAL;
+	}
+
+	if (buf_len < (unsafe_channel_list.unsafe_ch_count * sizeof(u16))) {
+		mutex_unlock(&unsafe_channel_list_lock);
+		return -ENOMEM;
+	}
+
+	*ch_count = unsafe_channel_list.unsafe_ch_count;
+	memcpy(
+		(char *)unsafe_ch_list,
+		(char *)unsafe_channel_list.unsafe_ch_list,
+		unsafe_channel_list.unsafe_ch_count * sizeof(u16));
+	mutex_unlock(&unsafe_channel_list_lock);
+
+	return 0;
+}
+EXPORT_SYMBOL(icnss_get_wlan_unsafe_channel);
+
+int icnss_wlan_set_dfs_nol(const void *info, u16 info_len)
+{
+	void *temp;
+	struct icnss_dfs_nol_info *dfs_info;
+
+	mutex_lock(&dfs_nol_info_lock);
+	if (!info || !info_len) {
+		mutex_unlock(&dfs_nol_info_lock);
+		return -EINVAL;
+	}
+
+	temp = kmalloc(info_len, GFP_KERNEL);
+	if (!temp) {
+		mutex_unlock(&dfs_nol_info_lock);
+		return -ENOMEM;
+	}
+
+	memcpy(temp, info, info_len);
+	dfs_info = &dfs_nol_info;
+	kfree(dfs_info->dfs_nol_info);
+
+	dfs_info->dfs_nol_info = temp;
+	dfs_info->dfs_nol_info_len = info_len;
+	mutex_unlock(&dfs_nol_info_lock);
+
+	return 0;
+}
+EXPORT_SYMBOL(icnss_wlan_set_dfs_nol);
+
+int icnss_wlan_get_dfs_nol(void *info, u16 info_len)
+{
+	int len;
+	struct icnss_dfs_nol_info *dfs_info;
+
+	mutex_lock(&dfs_nol_info_lock);
+	if (!info || !info_len) {
+		mutex_unlock(&dfs_nol_info_lock);
+		return -EINVAL;
+	}
+
+	dfs_info = &dfs_nol_info;
+
+	if (dfs_info->dfs_nol_info == NULL ||
+	    dfs_info->dfs_nol_info_len == 0) {
+		mutex_unlock(&dfs_nol_info_lock);
+		return -ENOENT;
+	}
+
+	len = min(info_len, dfs_info->dfs_nol_info_len);
+
+	memcpy(info, dfs_info->dfs_nol_info, len);
+	mutex_unlock(&dfs_nol_info_lock);
+
+	return len;
+}
+EXPORT_SYMBOL(icnss_wlan_get_dfs_nol);