407 lines
12 KiB
C
407 lines
12 KiB
C
/*
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* Marvell Wireless LAN device driver: utility functions
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*
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* Copyright (C) 2011-2014, Marvell International Ltd.
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*
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* This software file (the "File") is distributed by Marvell International
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* Ltd. under the terms of the GNU General Public License Version 2, June 1991
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* (the "License"). You may use, redistribute and/or modify this File in
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* accordance with the terms and conditions of the License, a copy of which
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* is available by writing to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
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* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
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*
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* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
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* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
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* this warranty disclaimer.
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*/
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#include "decl.h"
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#include "ioctl.h"
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#include "util.h"
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#include "fw.h"
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#include "main.h"
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#include "wmm.h"
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#include "11n.h"
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/*
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* Firmware initialization complete callback handler.
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*
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* This function wakes up the function waiting on the init
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* wait queue for the firmware initialization to complete.
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*/
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int mwifiex_init_fw_complete(struct mwifiex_adapter *adapter)
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{
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adapter->init_wait_q_woken = true;
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wake_up_interruptible(&adapter->init_wait_q);
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return 0;
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}
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/*
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* Firmware shutdown complete callback handler.
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*
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* This function sets the hardware status to not ready and wakes up
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* the function waiting on the init wait queue for the firmware
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* shutdown to complete.
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*/
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int mwifiex_shutdown_fw_complete(struct mwifiex_adapter *adapter)
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{
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adapter->hw_status = MWIFIEX_HW_STATUS_NOT_READY;
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adapter->init_wait_q_woken = true;
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wake_up_interruptible(&adapter->init_wait_q);
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return 0;
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}
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/*
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* This function sends init/shutdown command
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* to firmware.
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*/
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int mwifiex_init_shutdown_fw(struct mwifiex_private *priv,
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u32 func_init_shutdown)
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{
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u16 cmd;
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if (func_init_shutdown == MWIFIEX_FUNC_INIT) {
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cmd = HostCmd_CMD_FUNC_INIT;
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} else if (func_init_shutdown == MWIFIEX_FUNC_SHUTDOWN) {
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cmd = HostCmd_CMD_FUNC_SHUTDOWN;
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} else {
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dev_err(priv->adapter->dev, "unsupported parameter\n");
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return -1;
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}
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return mwifiex_send_cmd(priv, cmd, HostCmd_ACT_GEN_SET, 0, NULL, true);
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}
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EXPORT_SYMBOL_GPL(mwifiex_init_shutdown_fw);
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/*
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* IOCTL request handler to set/get debug information.
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*
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* This function collates/sets the information from/to different driver
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* structures.
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*/
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int mwifiex_get_debug_info(struct mwifiex_private *priv,
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struct mwifiex_debug_info *info)
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{
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struct mwifiex_adapter *adapter = priv->adapter;
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if (info) {
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memcpy(info->packets_out,
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priv->wmm.packets_out,
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sizeof(priv->wmm.packets_out));
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info->curr_tx_buf_size = (u32) adapter->curr_tx_buf_size;
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info->tx_buf_size = (u32) adapter->tx_buf_size;
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info->rx_tbl_num = mwifiex_get_rx_reorder_tbl(priv,
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info->rx_tbl);
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info->tx_tbl_num = mwifiex_get_tx_ba_stream_tbl(priv,
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info->tx_tbl);
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info->ps_mode = adapter->ps_mode;
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info->ps_state = adapter->ps_state;
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info->is_deep_sleep = adapter->is_deep_sleep;
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info->pm_wakeup_card_req = adapter->pm_wakeup_card_req;
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info->pm_wakeup_fw_try = adapter->pm_wakeup_fw_try;
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info->is_hs_configured = adapter->is_hs_configured;
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info->hs_activated = adapter->hs_activated;
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info->is_cmd_timedout = adapter->is_cmd_timedout;
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info->num_cmd_host_to_card_failure
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= adapter->dbg.num_cmd_host_to_card_failure;
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info->num_cmd_sleep_cfm_host_to_card_failure
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= adapter->dbg.num_cmd_sleep_cfm_host_to_card_failure;
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info->num_tx_host_to_card_failure
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= adapter->dbg.num_tx_host_to_card_failure;
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info->num_event_deauth = adapter->dbg.num_event_deauth;
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info->num_event_disassoc = adapter->dbg.num_event_disassoc;
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info->num_event_link_lost = adapter->dbg.num_event_link_lost;
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info->num_cmd_deauth = adapter->dbg.num_cmd_deauth;
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info->num_cmd_assoc_success =
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adapter->dbg.num_cmd_assoc_success;
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info->num_cmd_assoc_failure =
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adapter->dbg.num_cmd_assoc_failure;
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info->num_tx_timeout = adapter->dbg.num_tx_timeout;
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info->timeout_cmd_id = adapter->dbg.timeout_cmd_id;
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info->timeout_cmd_act = adapter->dbg.timeout_cmd_act;
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memcpy(info->last_cmd_id, adapter->dbg.last_cmd_id,
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sizeof(adapter->dbg.last_cmd_id));
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memcpy(info->last_cmd_act, adapter->dbg.last_cmd_act,
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sizeof(adapter->dbg.last_cmd_act));
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info->last_cmd_index = adapter->dbg.last_cmd_index;
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memcpy(info->last_cmd_resp_id, adapter->dbg.last_cmd_resp_id,
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sizeof(adapter->dbg.last_cmd_resp_id));
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info->last_cmd_resp_index = adapter->dbg.last_cmd_resp_index;
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memcpy(info->last_event, adapter->dbg.last_event,
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sizeof(adapter->dbg.last_event));
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info->last_event_index = adapter->dbg.last_event_index;
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info->data_sent = adapter->data_sent;
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info->cmd_sent = adapter->cmd_sent;
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info->cmd_resp_received = adapter->cmd_resp_received;
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}
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return 0;
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}
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static int
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mwifiex_parse_mgmt_packet(struct mwifiex_private *priv, u8 *payload, u16 len,
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struct rxpd *rx_pd)
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{
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u16 stype;
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u8 category, action_code;
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struct ieee80211_hdr *ieee_hdr = (void *)payload;
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stype = (le16_to_cpu(ieee_hdr->frame_control) & IEEE80211_FCTL_STYPE);
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switch (stype) {
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case IEEE80211_STYPE_ACTION:
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category = *(payload + sizeof(struct ieee80211_hdr));
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action_code = *(payload + sizeof(struct ieee80211_hdr) + 1);
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if (category == WLAN_CATEGORY_PUBLIC &&
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action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
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dev_dbg(priv->adapter->dev,
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"TDLS discovery response %pM nf=%d, snr=%d\n",
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ieee_hdr->addr2, rx_pd->nf, rx_pd->snr);
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mwifiex_auto_tdls_update_peer_signal(priv,
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ieee_hdr->addr2,
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rx_pd->snr,
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rx_pd->nf);
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}
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break;
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default:
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dev_dbg(priv->adapter->dev,
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"unknown mgmt frame subytpe %#x\n", stype);
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}
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return 0;
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}
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/*
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* This function processes the received management packet and send it
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* to the kernel.
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*/
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int
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mwifiex_process_mgmt_packet(struct mwifiex_private *priv,
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struct sk_buff *skb)
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{
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struct rxpd *rx_pd;
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u16 pkt_len;
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struct ieee80211_hdr *ieee_hdr;
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if (!skb)
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return -1;
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rx_pd = (struct rxpd *)skb->data;
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skb_pull(skb, le16_to_cpu(rx_pd->rx_pkt_offset));
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skb_pull(skb, sizeof(pkt_len));
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pkt_len = le16_to_cpu(rx_pd->rx_pkt_length);
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ieee_hdr = (void *)skb->data;
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if (ieee80211_is_mgmt(ieee_hdr->frame_control)) {
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mwifiex_parse_mgmt_packet(priv, (u8 *)ieee_hdr,
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pkt_len, rx_pd);
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}
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/* Remove address4 */
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memmove(skb->data + sizeof(struct ieee80211_hdr_3addr),
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skb->data + sizeof(struct ieee80211_hdr),
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pkt_len - sizeof(struct ieee80211_hdr));
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pkt_len -= ETH_ALEN + sizeof(pkt_len);
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rx_pd->rx_pkt_length = cpu_to_le16(pkt_len);
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cfg80211_rx_mgmt(priv->wdev, priv->roc_cfg.chan.center_freq,
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CAL_RSSI(rx_pd->snr, rx_pd->nf), skb->data, pkt_len,
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0);
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return 0;
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}
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/*
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* This function processes the received packet before sending it to the
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* kernel.
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*
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* It extracts the SKB from the received buffer and sends it to kernel.
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* In case the received buffer does not contain the data in SKB format,
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* the function creates a blank SKB, fills it with the data from the
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* received buffer and then sends this new SKB to the kernel.
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*/
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int mwifiex_recv_packet(struct mwifiex_private *priv, struct sk_buff *skb)
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{
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if (!skb)
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return -1;
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priv->stats.rx_bytes += skb->len;
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priv->stats.rx_packets++;
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skb->dev = priv->netdev;
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skb->protocol = eth_type_trans(skb, priv->netdev);
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skb->ip_summed = CHECKSUM_NONE;
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/* This is required only in case of 11n and USB/PCIE as we alloc
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* a buffer of 4K only if its 11N (to be able to receive 4K
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* AMSDU packets). In case of SD we allocate buffers based
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* on the size of packet and hence this is not needed.
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*
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* Modifying the truesize here as our allocation for each
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* skb is 4K but we only receive 2K packets and this cause
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* the kernel to start dropping packets in case where
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* application has allocated buffer based on 2K size i.e.
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* if there a 64K packet received (in IP fragments and
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* application allocates 64K to receive this packet but
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* this packet would almost double up because we allocate
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* each 1.5K fragment in 4K and pass it up. As soon as the
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* 64K limit hits kernel will start to drop rest of the
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* fragments. Currently we fail the Filesndl-ht.scr script
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* for UDP, hence this fix
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*/
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if ((priv->adapter->iface_type == MWIFIEX_USB ||
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priv->adapter->iface_type == MWIFIEX_PCIE) &&
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(skb->truesize > MWIFIEX_RX_DATA_BUF_SIZE))
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skb->truesize += (skb->len - MWIFIEX_RX_DATA_BUF_SIZE);
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if (in_interrupt())
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netif_rx(skb);
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else
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netif_rx_ni(skb);
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return 0;
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}
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/*
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* IOCTL completion callback handler.
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*
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* This function is called when a pending IOCTL is completed.
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*
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* If work queue support is enabled, the function wakes up the
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* corresponding waiting function. Otherwise, it processes the
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* IOCTL response and frees the response buffer.
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*/
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int mwifiex_complete_cmd(struct mwifiex_adapter *adapter,
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struct cmd_ctrl_node *cmd_node)
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{
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dev_dbg(adapter->dev, "cmd completed: status=%d\n",
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adapter->cmd_wait_q.status);
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*(cmd_node->condition) = true;
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if (adapter->cmd_wait_q.status == -ETIMEDOUT)
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dev_err(adapter->dev, "cmd timeout\n");
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else
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wake_up_interruptible(&adapter->cmd_wait_q.wait);
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return 0;
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}
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/* This function will return the pointer to station entry in station list
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* table which matches specified mac address.
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* This function should be called after acquiring RA list spinlock.
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* NULL is returned if station entry is not found in associated STA list.
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*/
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struct mwifiex_sta_node *
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mwifiex_get_sta_entry(struct mwifiex_private *priv, const u8 *mac)
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{
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struct mwifiex_sta_node *node;
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if (!mac)
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return NULL;
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list_for_each_entry(node, &priv->sta_list, list) {
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if (!memcmp(node->mac_addr, mac, ETH_ALEN))
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return node;
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}
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return NULL;
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}
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/* This function will add a sta_node entry to associated station list
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* table with the given mac address.
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* If entry exist already, existing entry is returned.
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* If received mac address is NULL, NULL is returned.
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*/
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struct mwifiex_sta_node *
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mwifiex_add_sta_entry(struct mwifiex_private *priv, const u8 *mac)
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{
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struct mwifiex_sta_node *node;
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unsigned long flags;
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if (!mac)
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return NULL;
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spin_lock_irqsave(&priv->sta_list_spinlock, flags);
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node = mwifiex_get_sta_entry(priv, mac);
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if (node)
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goto done;
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node = kzalloc(sizeof(*node), GFP_ATOMIC);
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if (!node)
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goto done;
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memcpy(node->mac_addr, mac, ETH_ALEN);
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list_add_tail(&node->list, &priv->sta_list);
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done:
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spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
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return node;
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}
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/* This function will search for HT IE in association request IEs
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* and set station HT parameters accordingly.
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*/
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void
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mwifiex_set_sta_ht_cap(struct mwifiex_private *priv, const u8 *ies,
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int ies_len, struct mwifiex_sta_node *node)
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{
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const struct ieee80211_ht_cap *ht_cap;
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if (!ies)
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return;
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ht_cap = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies, ies_len);
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if (ht_cap) {
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node->is_11n_enabled = 1;
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node->max_amsdu = le16_to_cpu(ht_cap->cap_info) &
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IEEE80211_HT_CAP_MAX_AMSDU ?
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MWIFIEX_TX_DATA_BUF_SIZE_8K :
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MWIFIEX_TX_DATA_BUF_SIZE_4K;
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} else {
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node->is_11n_enabled = 0;
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}
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return;
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}
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/* This function will delete a station entry from station list */
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void mwifiex_del_sta_entry(struct mwifiex_private *priv, const u8 *mac)
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{
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struct mwifiex_sta_node *node;
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unsigned long flags;
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spin_lock_irqsave(&priv->sta_list_spinlock, flags);
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node = mwifiex_get_sta_entry(priv, mac);
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if (node) {
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list_del(&node->list);
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kfree(node);
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}
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spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
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return;
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}
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/* This function will delete all stations from associated station list. */
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void mwifiex_del_all_sta_list(struct mwifiex_private *priv)
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{
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struct mwifiex_sta_node *node, *tmp;
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unsigned long flags;
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spin_lock_irqsave(&priv->sta_list_spinlock, flags);
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list_for_each_entry_safe(node, tmp, &priv->sta_list, list) {
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list_del(&node->list);
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kfree(node);
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}
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INIT_LIST_HEAD(&priv->sta_list);
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spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
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return;
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}
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