| /* |
| * Copyright (c) 2012-2015 The Linux Foundation. All rights reserved. |
| * |
| * Previously licensed under the ISC license by Qualcomm Atheros, Inc. |
| * |
| * |
| * 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_nan.c |
| * |
| * WLAN Host Device Driver NAN API implementation |
| */ |
| |
| #include <linux/version.h> |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <net/cfg80211.h> |
| #include <ani_global.h> |
| #include "sme_api.h" |
| #include "nan_api.h" |
| #include "wlan_hdd_main.h" |
| #include "wlan_hdd_nan.h" |
| |
| /** |
| * __wlan_hdd_cfg80211_nan_request() - cfg80211 NAN request handler |
| * @wiphy: driver's wiphy struct |
| * @wdev: wireless device to which the request is targeted |
| * @data: actual request data (netlink-encapsulated) |
| * @data_len: length of @data |
| * |
| * This is called when userspace needs to send a nan request to |
| * firmware. The wlan host driver simply de-encapsulates the |
| * request from the netlink payload and then forwards it to |
| * firmware via SME. |
| * |
| * Return: 0 on success, negative errno on failure |
| */ |
| static int __wlan_hdd_cfg80211_nan_request(struct wiphy *wiphy, |
| struct wireless_dev *wdev, |
| const void *data, |
| int data_len) |
| { |
| tNanRequestReq nan_req; |
| CDF_STATUS status; |
| int ret_val; |
| hdd_context_t *hdd_ctx = wiphy_priv(wiphy); |
| |
| ENTER(); |
| |
| ret_val = wlan_hdd_validate_context(hdd_ctx); |
| if (ret_val) |
| return ret_val; |
| |
| if (CDF_GLOBAL_FTM_MODE == hdd_get_conparam()) { |
| hdd_err("Command not allowed in FTM mode"); |
| return -EPERM; |
| } |
| |
| if (!hdd_ctx->config->enable_nan_support) { |
| hdd_err("NaN support is not enabled in INI"); |
| return -EPERM; |
| } |
| |
| nan_req.request_data_len = data_len; |
| nan_req.request_data = data; |
| |
| status = sme_nan_request(&nan_req); |
| if (CDF_STATUS_SUCCESS != status) { |
| ret_val = -EINVAL; |
| } |
| return ret_val; |
| } |
| |
| /** |
| * wlan_hdd_cfg80211_nan_request() - handle NAN request |
| * @wiphy: pointer to wireless wiphy structure. |
| * @wdev: pointer to wireless_dev structure. |
| * @data: Pointer to the data to be passed via vendor interface |
| * @data_len:Length of the data to be passed |
| * |
| * This function is called by userspace to send a NAN request to |
| * firmware. This is an SSR-protected wrapper function. |
| * |
| * Return: 0 on success, negative errno on failure |
| */ |
| int wlan_hdd_cfg80211_nan_request(struct wiphy *wiphy, |
| struct wireless_dev *wdev, |
| const void *data, |
| int data_len) |
| |
| { |
| int ret; |
| |
| cds_ssr_protect(__func__); |
| ret = __wlan_hdd_cfg80211_nan_request(wiphy, wdev, data, data_len); |
| cds_ssr_unprotect(__func__); |
| |
| return ret; |
| } |
| |
| /** |
| * wlan_hdd_cfg80211_nan_callback() - cfg80211 NAN event handler |
| * @ctx: global HDD context |
| * @msg: NAN event message |
| * |
| * This is a callback function and it gets called when we need to report |
| * a nan event to userspace. The wlan host driver simply encapsulates the |
| * event into a netlink payload and then forwards it to userspace via a |
| * cfg80211 vendor event. |
| * |
| * Return: nothing |
| */ |
| static void wlan_hdd_cfg80211_nan_callback(void *ctx, tSirNanEvent *msg) |
| { |
| hdd_context_t *hdd_ctx = ctx; |
| struct sk_buff *vendor_event; |
| int status; |
| |
| if (NULL == msg) { |
| CDF_TRACE(CDF_MODULE_ID_HDD, CDF_TRACE_LEVEL_ERROR, |
| FL("msg received here is null")); |
| return; |
| } |
| |
| status = wlan_hdd_validate_context(hdd_ctx); |
| if (0 != status) { |
| CDF_TRACE(CDF_MODULE_ID_HDD, CDF_TRACE_LEVEL_ERROR, |
| FL("HDD context is not valid")); |
| return; |
| } |
| |
| vendor_event = |
| cfg80211_vendor_event_alloc(hdd_ctx->wiphy, |
| NULL, |
| msg->event_data_len + NLMSG_HDRLEN, |
| QCA_NL80211_VENDOR_SUBCMD_NAN_INDEX, |
| GFP_KERNEL); |
| |
| if (!vendor_event) { |
| CDF_TRACE(CDF_MODULE_ID_HDD, CDF_TRACE_LEVEL_ERROR, |
| FL("cfg80211_vendor_event_alloc failed")); |
| return; |
| } |
| if (nla_put(vendor_event, QCA_WLAN_VENDOR_ATTR_NAN, |
| msg->event_data_len, msg->event_data)) { |
| CDF_TRACE(CDF_MODULE_ID_HDD, CDF_TRACE_LEVEL_ERROR, |
| FL("QCA_WLAN_VENDOR_ATTR_NAN put fail")); |
| kfree_skb(vendor_event); |
| return; |
| } |
| cfg80211_vendor_event(vendor_event, GFP_KERNEL); |
| } |
| |
| /** |
| * wlan_hdd_nan_is_supported() - HDD NAN support query function |
| * |
| * This function is called to determine if NAN is supported by the |
| * driver and by the firmware. |
| * |
| * Return: true if NAN is supported by the driver and firmware |
| */ |
| bool wlan_hdd_nan_is_supported(void) |
| { |
| return sme_is_feature_supported_by_fw(NAN); |
| } |
| |
| /** |
| * wlan_hdd_nan_init() - HDD NAN initialization function |
| * @hdd_ctx: Global HDD context |
| * |
| * This function is called to initialize the HDD NAN feature. Currently |
| * the only operation required is to register a callback with SME. |
| * |
| * Return: void |
| */ |
| void wlan_hdd_nan_init(hdd_context_t *hdd_ctx) |
| { |
| sme_nan_register_callback(hdd_ctx->hHal, |
| wlan_hdd_cfg80211_nan_callback); |
| } |