qcacld-3.0: Add sysfs entry for enable_dcm and get_dcm

Add the sysfs entry for enable_dcm and get_dcm.
Previously these commands would be queried via iwpriv
--> iwpriv wlan0 enable_dcm [0/1]
--> iwpriv wlan0 get_dcm
it is now changed to support via sysfs:
--> echo [0/1] > /sys/class/net/wlanxx/dcm
--> cat /sys/class/net/wlanxx/dcm

Change-Id: I6f7d2e93c362b4d3018d7f5698dd1bba01123600
CRs-Fixed: 2685960

Kbuild

@@ -285,6 +285,9 @@ endif
 ifeq ($(CONFIG_WLAN_SCAN_DISABLE), y)
 HDD_OBJS += $(HDD_SRC_DIR)/wlan_hdd_sysfs_scan_disable.o
 endif
+ifeq ($(CONFIG_WLAN_SYSFS_DCM), y)
+HDD_OBJS += $(HDD_SRC_DIR)/wlan_hdd_sysfs_dcm.o
+endif
 ifeq ($(CONFIG_WLAN_WOW_ITO), y)
 HDD_OBJS += $(HDD_SRC_DIR)/wlan_hdd_sysfs_wow_ito.o
 endif
@@ -2586,6 +2589,7 @@ cppflags-$(CONFIG_WLAN_GET_TEMP) += -DCONFIG_WLAN_GET_TEMP
 cppflags-$(CONFIG_WLAN_THERMAL_CFG) += -DCONFIG_WLAN_THERMAL_CFG
 cppflags-$(CONFIG_FEATURE_UNIT_TEST_SUSPEND) += -DWLAN_SUSPEND_RESUME_TEST
 cppflags-$(CONFIG_FEATURE_WLM_STATS) += -DFEATURE_WLM_STATS
+cppflags-$(CONFIG_WLAN_SYSFS_DCM) += -DWLAN_SYSFS_DCM
 cppflags-$(CONFIG_WLAN_SYSFS_GET_STA_INFO) += -DWLAN_SYSFS_GET_STA_INFO
 
 ifeq ($(CONFIG_LEAK_DETECTION), y)

configs/default_defconfig

@@ -181,6 +181,7 @@ ifeq ($(CONFIG_WLAN_SYSFS), y)
 	CONFIG_WLAN_REASSOC := y
 	CONFIG_WLAN_SYSFS_CONNECT_INFO := y
 	CONFIG_WLAN_SCAN_DISABLE := y
+	CONFIG_WLAN_SYSFS_DCM := y
 	CONFIG_WLAN_WOW_ITO := y
 	CONFIG_WLAN_WOWL_ADD_PTRN := y
 	CONFIG_WLAN_WOWL_DEL_PTRN := y

core/hdd/src/wlan_hdd_sysfs.c

@@ -47,6 +47,7 @@
 #include "wlan_hdd_sysfs_modify_acl.h"
 #include "wlan_hdd_sysfs_connect_info.h"
 #include <wlan_hdd_sysfs_scan_disable.h>
+#include "wlan_hdd_sysfs_dcm.h"
 #include <wlan_hdd_sysfs_wow_ito.h>
 #include <wlan_hdd_sysfs_wowl_add_ptrn.h>
 #include <wlan_hdd_sysfs_wowl_del_ptrn.h>
@@ -644,6 +645,7 @@ hdd_sysfs_create_sta_adapter_root_obj(struct hdd_adapter *adapter)
 	hdd_sysfs_resume_create(adapter);
 	hdd_sysfs_unit_test_target_create(adapter);
 	hdd_sysfs_connect_info_interface_create(adapter);
+	hdd_sysfs_dcm_create(adapter);
 	hdd_sysfs_wowl_add_ptrn_create(adapter);
 	hdd_sysfs_wowl_del_ptrn_create(adapter);
 	hdd_sysfs_get_tx_stbc_create(adapter);
@@ -673,6 +675,7 @@ hdd_sysfs_destroy_sta_adapter_root_obj(struct hdd_adapter *adapter)
 	hdd_sysfs_get_tx_stbc_destroy(adapter);
 	hdd_sysfs_wowl_del_ptrn_destroy(adapter);
 	hdd_sysfs_wowl_add_ptrn_destroy(adapter);
+	hdd_sysfs_dcm_destroy(adapter);
 	hdd_sysfs_connect_info_interface_destroy(adapter);
 	hdd_sysfs_unit_test_target_destroy(adapter);
 	hdd_sysfs_resume_destroy(adapter);
@@ -698,6 +701,7 @@ hdd_sysfs_create_sap_adapter_root_obj(struct hdd_adapter *adapter)
 	hdd_sysfs_get_stats_create(adapter);
 	hdd_sysfs_txrx_fw_st_rst_create(adapter);
 	hdd_sysfs_gtx_bw_mask_create(adapter);
+	hdd_sysfs_dcm_create(adapter);
 	hdd_sysfs_set_radar_create(adapter);
 	hdd_sysfs_txrx_fw_stats_create(adapter);
 	hdd_sysfs_txrx_stats_create(adapter);
@@ -711,6 +715,7 @@ hdd_sysfs_destroy_sap_adapter_root_obj(struct hdd_adapter *adapter)
 	hdd_sysfs_txrx_stats_destroy(adapter);
 	hdd_sysfs_txrx_fw_stats_destroy(adapter);
 	hdd_sysfs_set_radar_destroy(adapter);
+	hdd_sysfs_dcm_destroy(adapter);
 	hdd_sysfs_gtx_bw_mask_destroy(adapter);
 	hdd_sysfs_txrx_fw_st_rst_destroy(adapter);
 	hdd_sysfs_get_stats_destroy(adapter);

core/hdd/src/wlan_hdd_sysfs_dcm.c

@@ -0,0 +1,163 @@
+/*
+ * Copyright (c) 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_dcm.c
+ *
+ * implementation for creating sysfs file dcm
+ */
+
+#include <wlan_hdd_includes.h>
+#include "osif_vdev_sync.h"
+#include <wlan_hdd_sysfs.h>
+#include "wlan_hdd_sysfs_dcm.h"
+#include <wma_api.h>
+
+static ssize_t
+__wlan_hdd_sysfs_dcm_store(struct net_device *net_dev, char const *buf,
+			   size_t count)
+{
+	struct hdd_adapter *adapter = netdev_priv(net_dev);
+	struct hdd_context *hdd_ctx;
+	char buf_local[MAX_SYSFS_USER_COMMAND_SIZE_LENGTH + 1];
+	char *sptr, *token;
+	int value, ret;
+
+	if (hdd_validate_adapter(adapter)) {
+		hdd_err_rl("adapter validate fail");
+		return -EINVAL;
+	}
+
+	hdd_ctx = WLAN_HDD_GET_CTX(adapter);
+	ret = wlan_hdd_validate_context(hdd_ctx);
+	if (ret != 0)
+		return ret;
+
+	if (!wlan_hdd_validate_modules_state(hdd_ctx))
+		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;
+	token = strsep(&sptr, " ");
+	if (!token)
+		return -EINVAL;
+	if (kstrtou32(token, 0, &value))
+		return -EINVAL;
+
+	hdd_debug("dcm %d", value);
+
+	ret = wma_cli_set_command(adapter->vdev_id, WMI_VDEV_PARAM_HE_DCM,
+				  value, VDEV_CMD);
+	if (ret) {
+		hdd_err_rl("Failed to set dcm, errno %d", ret);
+		return ret;
+	}
+
+	return count;
+}
+
+static ssize_t wlan_hdd_sysfs_dcm_store(struct device *dev,
+					struct device_attribute *attr,
+					char const *buf, size_t count)
+{
+	struct net_device *net_dev = container_of(dev, struct net_device, dev);
+	struct osif_vdev_sync *vdev_sync;
+	ssize_t err_size;
+
+	err_size = osif_vdev_sync_op_start(net_dev, &vdev_sync);
+	if (err_size)
+		return err_size;
+
+	err_size = __wlan_hdd_sysfs_dcm_store(net_dev, buf, count);
+
+	osif_vdev_sync_op_stop(vdev_sync);
+
+	return err_size;
+}
+
+static ssize_t
+__wlan_hdd_sysfs_dcm_show(struct net_device *net_dev, char *buf)
+{
+	struct hdd_adapter *adapter = netdev_priv(net_dev);
+	struct hdd_context *hdd_ctx;
+	int ret, value;
+
+	if (hdd_validate_adapter(adapter)) {
+		hdd_err_rl("adapter validate fail");
+		return -EINVAL;
+	}
+
+	hdd_ctx = WLAN_HDD_GET_CTX(adapter);
+	ret = wlan_hdd_validate_context(hdd_ctx);
+	if (ret != 0)
+		return ret;
+
+	if (!wlan_hdd_validate_modules_state(hdd_ctx))
+		return -EINVAL;
+
+	value = wma_cli_get_command(adapter->vdev_id, WMI_VDEV_PARAM_HE_DCM,
+				    VDEV_CMD);
+
+	hdd_debug("dcm %d", value);
+
+	ret = scnprintf(buf, PAGE_SIZE, "%d", value);
+
+	return ret;
+}
+
+static ssize_t wlan_hdd_sysfs_dcm_show(struct device *dev,
+				       struct device_attribute *attr,
+				       char *buf)
+{
+	struct net_device *net_dev = container_of(dev, struct net_device, dev);
+	struct osif_vdev_sync *vdev_sync;
+	ssize_t err_size;
+
+	err_size = osif_vdev_sync_op_start(net_dev, &vdev_sync);
+	if (err_size)
+		return err_size;
+
+	err_size = __wlan_hdd_sysfs_dcm_show(net_dev, buf);
+
+	osif_vdev_sync_op_stop(vdev_sync);
+
+	return err_size;
+}
+
+static DEVICE_ATTR(dcm, 0664, wlan_hdd_sysfs_dcm_show,
+		   wlan_hdd_sysfs_dcm_store);
+
+int hdd_sysfs_dcm_create(struct hdd_adapter *adapter)
+{
+	int error;
+
+	error = device_create_file(&adapter->dev->dev, &dev_attr_dcm);
+	if (error)
+		hdd_err("could not create dcm sysfs file");
+
+	return error;
+}
+
+void hdd_sysfs_dcm_destroy(struct hdd_adapter *adapter)
+{
+	device_remove_file(&adapter->dev->dev, &dev_attr_dcm);
+}

core/hdd/src/wlan_hdd_sysfs_dcm.h

@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 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_dcm.h
+ *
+ * implementation for creating sysfs file dcm
+ */
+
+#ifndef _WLAN_HDD_SYSFS_DCM_H
+#define _WLAN_HDD_SYSFS_DCM_H
+
+#if defined(WLAN_SYSFS) && defined(WLAN_SYSFS_DCM)
+/**
+ * hdd_sysfs_dcm_create() - API to create dcm
+ * @adapter: pointer to adapter
+ *
+ * this file is created per adapter.
+ * file path: /sys/class/net/wlanxx/dcm
+ * where wlanxx is adapter name
+ *
+ * usage:
+ *      echo [0/1] > dcm
+ *      cat dcm
+ *
+ * Return: 0 on success and errno on failure
+ */
+int hdd_sysfs_dcm_create(struct hdd_adapter *adapter);
+
+/**
+ * hdd_sysfs_dcm_destroy() -
+ *   API to destroy dcm
+ * @adapter: pointer to adapter
+ *
+ * Return: none
+ */
+void hdd_sysfs_dcm_destroy(struct hdd_adapter *adapter);
+#else
+static inline int
+hdd_sysfs_dcm_create(struct hdd_adapter *adapter)
+{
+	return 0;
+}
+
+static inline void
+hdd_sysfs_dcm_destroy(struct hdd_adapter *adapter)
+{
+}
+#endif
+#endif /* #ifndef _WLAN_HDD_SYSFS_DCM_H */