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+/*
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+ * Copyright (c) 2020 The Linux Foundation. All rights reserved.
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+ *
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+ * Permission to use, copy, modify, and/or distribute this software for any
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+ * purpose with or without fee is hereby granted, provided that the above
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+ * copyright notice and this permission notice appear in all copies.
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+ *
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+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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+ */
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+
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+/**
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+ * DOC: wlan_hdd_sysfs_rts_cts.c
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+ *
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+ * implementation for creating sysfs file rts_cts
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+ */
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+
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+#include <wlan_hdd_includes.h>
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+#include "osif_vdev_sync.h"
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+#include <wlan_hdd_sysfs.h>
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+#include "wlan_hdd_sysfs_rts_cts.h"
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+#include <wlan_mlme_ucfg_api.h>
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+#include <cfg_ucfg_api.h>
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+#include <cfg_mlme_threshold.h>
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+#include <wma_api.h>
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+
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+static ssize_t
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+__hdd_sysfs_rts_cts_store(struct net_device *net_dev,
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+ char const *buf, size_t count)
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+{
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+ struct hdd_adapter *adapter = netdev_priv(net_dev);
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+ char buf_local[MAX_SYSFS_USER_COMMAND_SIZE_LENGTH + 1];
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+ struct hdd_context *hdd_ctx;
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+ char *sptr, *token;
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+ uint32_t rts_threshold;
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+ QDF_STATUS status;
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+ int value, ret;
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+
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+ if (hdd_validate_adapter(adapter)) {
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+ hdd_err_rl("adapter validate fail");
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+ return -EINVAL;
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+ }
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+
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+ hdd_ctx = WLAN_HDD_GET_CTX(adapter);
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+ ret = wlan_hdd_validate_context(hdd_ctx);
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+ if (ret != 0)
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+ return ret;
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+
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+ if (!wlan_hdd_validate_modules_state(hdd_ctx))
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+ return -EINVAL;
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+
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+ ret = hdd_sysfs_validate_and_copy_buf(buf_local, sizeof(buf_local),
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+ buf, count);
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+
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+ if (ret) {
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+ hdd_err_rl("invalid input");
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+ return ret;
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+ }
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+
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+ sptr = buf_local;
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+ token = strsep(&sptr, " ");
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+ if (!token)
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+ return -EINVAL;
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+ if (kstrtou32(token, 0, &value))
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+ return -EINVAL;
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+
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+ switch (value) {
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+ case HDD_SYSFS_RTS_CTS_ENABLE:
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+ status = ucfg_mlme_get_rts_threshold(hdd_ctx->psoc,
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+ &rts_threshold);
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+ if (QDF_IS_STATUS_ERROR(status)) {
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+ hdd_err_rl("Get rts threshold failed, status %d",
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+ status);
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+ return -EINVAL;
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+ }
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+ break;
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+ case HDD_SYSFS_RTS_CTS_DISABLE:
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+ case HDD_SYSFS_CTS_ENABLE:
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+ rts_threshold = cfg_max(CFG_RTS_THRESHOLD);
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+ break;
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+ default:
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+ hdd_err_rl("invalid value %d", value);
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+ return -EINVAL;
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+ }
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+
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+ ret = wma_cli_set_command(adapter->vdev_id,
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+ WMI_VDEV_PARAM_ENABLE_RTSCTS,
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+ value, VDEV_CMD);
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+ if (ret) {
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+ hdd_err_rl("Failed to set firmware, ret %d", ret);
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+ return ret;
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+ }
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+
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+ status = ucfg_mlme_set_rts_threshold(hdd_ctx->psoc, rts_threshold);
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+ if (QDF_IS_STATUS_ERROR(status)) {
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+ hdd_err_rl("Set rts threshold failed, status %d", status);
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+ return -EINVAL;
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+ }
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+
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+ return count;
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+}
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+
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+static ssize_t
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+hdd_sysfs_rts_cts_store(struct device *dev,
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+ struct device_attribute *attr,
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+ char const *buf, size_t count)
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+{
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+ struct net_device *net_dev = container_of(dev, struct net_device, dev);
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+ struct osif_vdev_sync *vdev_sync;
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+ ssize_t errno_size;
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+
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+ errno_size = osif_vdev_sync_op_start(net_dev, &vdev_sync);
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+ if (errno_size)
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+ return errno_size;
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+
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+ errno_size = __hdd_sysfs_rts_cts_store(net_dev, buf, count);
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+
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+ osif_vdev_sync_op_stop(vdev_sync);
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+
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+ return errno_size;
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+}
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+
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+static DEVICE_ATTR(rts_cts, 0220,
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+ NULL, hdd_sysfs_rts_cts_store);
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+
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+int hdd_sysfs_rts_cts_create(struct hdd_adapter *adapter)
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+{
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+ int error;
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+
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+ error = device_create_file(&adapter->dev->dev, &dev_attr_rts_cts);
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+ if (error)
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+ hdd_err("could not create rts_cts sysfs file");
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+
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+ return error;
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+}
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+
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+void hdd_sysfs_rts_cts_destroy(struct hdd_adapter *adapter)
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+{
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+ device_remove_file(&adapter->dev->dev, &dev_attr_rts_cts);
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+}
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Min Liu