qcacld-3.0: Add a sysfs replacement for scan_disable

As part of WEXT replacement, replace scan_disable with a sysfs file.

file path: /sys/kernel/wifi/scan_disable

example: echo 1 > scan_disable

Change-Id: Icaa7083d0f7b2cefd0f77cb7da7fe0d3d52d36c5
CRs-Fixed: 2676764

Kbuild

@@ -276,6 +276,9 @@ HDD_OBJS += $(HDD_SRC_DIR)/wlan_hdd_sysfs_modify_acl.o
 ifeq ($(CONFIG_WLAN_SYSFS_CONNECT_INFO), y)
 HDD_OBJS += $(HDD_SRC_DIR)/wlan_hdd_sysfs_connect_info.o
 endif
+ifeq ($(CONFIG_WLAN_SCAN_DISABLE), y)
+HDD_OBJS += $(HDD_SRC_DIR)/wlan_hdd_sysfs_scan_disable.o
+endif
 endif
 
 ifeq ($(CONFIG_QCACLD_FEATURE_FW_STATE), y)
@@ -2504,6 +2507,7 @@ cppflags-$(CONFIG_UNIT_TEST) += -DWLAN_UNIT_TEST
 cppflags-$(CONFIG_WLAN_DEBUG_CRASH_INJECT) += -DCONFIG_WLAN_DEBUG_CRASH_INJECT
 cppflags-$(CONFIG_WLAN_SET_FW_MODE_CFG) += -DCONFIG_WLAN_SET_FW_MODE_CFG
 cppflags-$(CONFIG_WLAN_REASSOC) += -DCONFIG_WLAN_REASSOC
+cppflags-$(CONFIG_WLAN_SCAN_DISABLE) += -DCONFIG_WLAN_SCAN_DISABLE
 cppflags-$(CONFIG_FEATURE_UNIT_TEST_SUSPEND) += -DWLAN_SUSPEND_RESUME_TEST
 cppflags-$(CONFIG_FEATURE_WLM_STATS) += -DFEATURE_WLM_STATS
 

configs/default_defconfig

@@ -178,6 +178,7 @@ ifeq ($(CONFIG_WLAN_SYSFS), y)
 	CONFIG_WLAN_SET_FW_MODE_CFG := y
 	CONFIG_WLAN_REASSOC := y
 	CONFIG_WLAN_SYSFS_CONNECT_INFO := y
+	CONFIG_WLAN_SCAN_DISABLE := y
 endif
 
 CONFIG_WLAN_POWER_DEBUG := y

core/hdd/src/wlan_hdd_sysfs.c

@@ -44,6 +44,7 @@
 #include "wlan_hdd_sysfs_unit_test.h"
 #include "wlan_hdd_sysfs_modify_acl.h"
 #include "wlan_hdd_sysfs_connect_info.h"
+#include <wlan_hdd_sysfs_scan_disable.h>
 
 #define MAX_PSOC_ID_SIZE 10
 
@@ -664,12 +665,14 @@ void hdd_create_sysfs_files(struct hdd_context *hdd_ctx)
 	if  (QDF_GLOBAL_MISSION_MODE == hdd_get_conparam()) {
 		hdd_sysfs_create_powerstats_interface();
 		hdd_sysfs_set_fw_mode_cfg_create(driver_kobject);
+		hdd_sysfs_scan_disable_create(driver_kobject);
 	}
 }
 
 void hdd_destroy_sysfs_files(void)
 {
 	if  (QDF_GLOBAL_MISSION_MODE == hdd_get_conparam()) {
+		hdd_sysfs_scan_disable_destroy(driver_kobject);
 		hdd_sysfs_set_fw_mode_cfg_destroy(driver_kobject);
 		hdd_sysfs_destroy_powerstats_interface();
 	}

core/hdd/src/wlan_hdd_sysfs_scan_disable.c

@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2011-2020 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_sysfs_scan_disable.c
+ *
+ * implementation for creating sysfs scan_disable
+ */
+
+#include <wlan_hdd_includes.h>
+#include "osif_psoc_sync.h"
+#include <wlan_hdd_sysfs.h>
+#include <wlan_hdd_sysfs_scan_disable.h>
+
+static ssize_t
+__hdd_sysfs_scan_disable_store(struct hdd_context *hdd_ctx,
+			       struct kobj_attribute *attr,
+			       const char *buf, size_t count)
+{
+	char buf_local[MAX_SYSFS_USER_COMMAND_SIZE_LENGTH + 1];
+	char *sptr, *token;
+	uint32_t value;
+	int ret;
+
+	if (!wlan_hdd_validate_modules_state(hdd_ctx))
+		return -EINVAL;
+
+	if (!hdd_ctx->psoc)
+		return -EINVAL;
+
+	ret = hdd_sysfs_validate_and_copy_buf(buf_local, sizeof(buf_local),
+					      buf, count);
+	if (ret) {
+		hdd_err_rl("invalid input");
+		return ret;
+	}
+
+	sptr = buf_local;
+	hdd_debug("scan_disable: count %zu buf_local:(%s)",
+		  count, buf_local);
+
+	/* Get value */
+	token = strsep(&sptr, " ");
+	if (!token)
+		return -EINVAL;
+	if (kstrtou32(token, 0, &value))
+		return -EINVAL;
+
+	hdd_debug("%d", value);
+
+	if (value)
+		ucfg_scan_psoc_set_disable(hdd_ctx->psoc, REASON_USER_SPACE);
+	else
+		ucfg_scan_psoc_set_enable(hdd_ctx->psoc, REASON_USER_SPACE);
+
+	return count;
+}
+
+static ssize_t
+hdd_sysfs_scan_disable_store(struct kobject *kobj,
+			     struct kobj_attribute *attr,
+			     const char *buf, size_t count)
+{
+	struct osif_psoc_sync *psoc_sync;
+	struct hdd_context *hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD);
+	ssize_t errno_size;
+	int ret;
+
+	ret = wlan_hdd_validate_context(hdd_ctx);
+	if (ret)
+		return ret;
+
+	errno_size = osif_psoc_sync_op_start(wiphy_dev(hdd_ctx->wiphy),
+					     &psoc_sync);
+	if (errno_size)
+		return errno_size;
+
+	errno_size = __hdd_sysfs_scan_disable_store(hdd_ctx, attr,
+						    buf, count);
+
+	osif_psoc_sync_op_stop(psoc_sync);
+
+	return errno_size;
+}
+
+static struct kobj_attribute scan_disable_attribute =
+	__ATTR(scan_disable, 0220, NULL,
+	       hdd_sysfs_scan_disable_store);
+
+int hdd_sysfs_scan_disable_create(struct kobject *driver_kobject)
+{
+	int error;
+
+	if (!driver_kobject) {
+		hdd_err("could not get driver kobject!");
+		return -EINVAL;
+	}
+
+	error = sysfs_create_file(driver_kobject,
+				  &scan_disable_attribute.attr);
+	if (error)
+		hdd_err("could not create scan_disable sysfs file");
+
+	return error;
+}
+
+void
+hdd_sysfs_scan_disable_destroy(struct kobject *driver_kobject)
+{
+	if (!driver_kobject) {
+		hdd_err("could not get driver kobject!");
+		return;
+	}
+	sysfs_remove_file(driver_kobject, &scan_disable_attribute.attr);
+}

core/hdd/src/wlan_hdd_sysfs_scan_disable.h

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2011-2020 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_sysfs_scan_disable.h
+ *
+ * implementation for creating sysfs file scan_disable
+ */
+
+#ifndef _WLAN_HDD_SYSFS_SCAN_DISABLE_H
+#define _WLAN_HDD_SYSFS_SCAN_DISABLE_H
+
+#if defined(WLAN_SYSFS) && defined(CONFIG_WLAN_SCAN_DISABLE)
+/**
+ * hdd_sysfs_scan_disable_create() - API to create scan_disable
+ * @driver_kobject: sysfs driver kobject
+ *
+ * file path: /sys/kernel/wifi/scan_disable
+ *
+ * usage:
+ *      echo [arg_0] > scan_disable
+ *
+ * Return: 0 on success and errno on failure
+ */
+int hdd_sysfs_scan_disable_create(struct kobject *driver_kobject);
+
+/**
+ * hdd_sysfs_scan_disable_destroy() - API to destroy scan_disable
+ *
+ * Return: none
+ */
+void
+hdd_sysfs_scan_disable_destroy(struct kobject *driver_kobject);
+#else
+static inline int
+hdd_sysfs_scan_disable_create(struct kobject *driver_kobject)
+{
+	return 0;
+}
+
+static inline void
+hdd_sysfs_scan_disable_destroy(struct kobject *driver_kobject)
+{
+}
+#endif
+#endif /* #ifndef _WLAN_HDD_SYSFS_SCAN_DISABLE_H */