| /* |
| * Marvell Wireless LAN device driver: utility functions |
| * |
| * Copyright (C) 2011-2014, Marvell International Ltd. |
| * |
| * This software file (the "File") is distributed by Marvell International |
| * Ltd. under the terms of the GNU General Public License Version 2, June 1991 |
| * (the "License"). You may use, redistribute and/or modify this File in |
| * accordance with the terms and conditions of the License, a copy of which |
| * is available by writing to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the |
| * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. |
| * |
| * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE |
| * ARE EXPRESSLY DISCLAIMED. The License provides additional details about |
| * this warranty disclaimer. |
| */ |
| |
| #include "decl.h" |
| #include "ioctl.h" |
| #include "util.h" |
| #include "fw.h" |
| #include "main.h" |
| #include "wmm.h" |
| #include "11n.h" |
| |
| static struct mwifiex_debug_data items[] = { |
| {"debug_mask", item_size(debug_mask), |
| item_addr(debug_mask), 1}, |
| {"int_counter", item_size(int_counter), |
| item_addr(int_counter), 1}, |
| {"wmm_ac_vo", item_size(packets_out[WMM_AC_VO]), |
| item_addr(packets_out[WMM_AC_VO]), 1}, |
| {"wmm_ac_vi", item_size(packets_out[WMM_AC_VI]), |
| item_addr(packets_out[WMM_AC_VI]), 1}, |
| {"wmm_ac_be", item_size(packets_out[WMM_AC_BE]), |
| item_addr(packets_out[WMM_AC_BE]), 1}, |
| {"wmm_ac_bk", item_size(packets_out[WMM_AC_BK]), |
| item_addr(packets_out[WMM_AC_BK]), 1}, |
| {"tx_buf_size", item_size(tx_buf_size), |
| item_addr(tx_buf_size), 1}, |
| {"curr_tx_buf_size", item_size(curr_tx_buf_size), |
| item_addr(curr_tx_buf_size), 1}, |
| {"ps_mode", item_size(ps_mode), |
| item_addr(ps_mode), 1}, |
| {"ps_state", item_size(ps_state), |
| item_addr(ps_state), 1}, |
| {"is_deep_sleep", item_size(is_deep_sleep), |
| item_addr(is_deep_sleep), 1}, |
| {"wakeup_dev_req", item_size(pm_wakeup_card_req), |
| item_addr(pm_wakeup_card_req), 1}, |
| {"wakeup_tries", item_size(pm_wakeup_fw_try), |
| item_addr(pm_wakeup_fw_try), 1}, |
| {"hs_configured", item_size(is_hs_configured), |
| item_addr(is_hs_configured), 1}, |
| {"hs_activated", item_size(hs_activated), |
| item_addr(hs_activated), 1}, |
| {"num_tx_timeout", item_size(num_tx_timeout), |
| item_addr(num_tx_timeout), 1}, |
| {"is_cmd_timedout", item_size(is_cmd_timedout), |
| item_addr(is_cmd_timedout), 1}, |
| {"timeout_cmd_id", item_size(timeout_cmd_id), |
| item_addr(timeout_cmd_id), 1}, |
| {"timeout_cmd_act", item_size(timeout_cmd_act), |
| item_addr(timeout_cmd_act), 1}, |
| {"last_cmd_id", item_size(last_cmd_id), |
| item_addr(last_cmd_id), DBG_CMD_NUM}, |
| {"last_cmd_act", item_size(last_cmd_act), |
| item_addr(last_cmd_act), DBG_CMD_NUM}, |
| {"last_cmd_index", item_size(last_cmd_index), |
| item_addr(last_cmd_index), 1}, |
| {"last_cmd_resp_id", item_size(last_cmd_resp_id), |
| item_addr(last_cmd_resp_id), DBG_CMD_NUM}, |
| {"last_cmd_resp_index", item_size(last_cmd_resp_index), |
| item_addr(last_cmd_resp_index), 1}, |
| {"last_event", item_size(last_event), |
| item_addr(last_event), DBG_CMD_NUM}, |
| {"last_event_index", item_size(last_event_index), |
| item_addr(last_event_index), 1}, |
| {"num_cmd_h2c_fail", item_size(num_cmd_host_to_card_failure), |
| item_addr(num_cmd_host_to_card_failure), 1}, |
| {"num_cmd_sleep_cfm_fail", |
| item_size(num_cmd_sleep_cfm_host_to_card_failure), |
| item_addr(num_cmd_sleep_cfm_host_to_card_failure), 1}, |
| {"num_tx_h2c_fail", item_size(num_tx_host_to_card_failure), |
| item_addr(num_tx_host_to_card_failure), 1}, |
| {"num_evt_deauth", item_size(num_event_deauth), |
| item_addr(num_event_deauth), 1}, |
| {"num_evt_disassoc", item_size(num_event_disassoc), |
| item_addr(num_event_disassoc), 1}, |
| {"num_evt_link_lost", item_size(num_event_link_lost), |
| item_addr(num_event_link_lost), 1}, |
| {"num_cmd_deauth", item_size(num_cmd_deauth), |
| item_addr(num_cmd_deauth), 1}, |
| {"num_cmd_assoc_ok", item_size(num_cmd_assoc_success), |
| item_addr(num_cmd_assoc_success), 1}, |
| {"num_cmd_assoc_fail", item_size(num_cmd_assoc_failure), |
| item_addr(num_cmd_assoc_failure), 1}, |
| {"cmd_sent", item_size(cmd_sent), |
| item_addr(cmd_sent), 1}, |
| {"data_sent", item_size(data_sent), |
| item_addr(data_sent), 1}, |
| {"cmd_resp_received", item_size(cmd_resp_received), |
| item_addr(cmd_resp_received), 1}, |
| {"event_received", item_size(event_received), |
| item_addr(event_received), 1}, |
| |
| /* variables defined in struct mwifiex_adapter */ |
| {"cmd_pending", adapter_item_size(cmd_pending), |
| adapter_item_addr(cmd_pending), 1}, |
| {"tx_pending", adapter_item_size(tx_pending), |
| adapter_item_addr(tx_pending), 1}, |
| {"rx_pending", adapter_item_size(rx_pending), |
| adapter_item_addr(rx_pending), 1}, |
| }; |
| |
| static int num_of_items = ARRAY_SIZE(items); |
| |
| /* |
| * Firmware initialization complete callback handler. |
| * |
| * This function wakes up the function waiting on the init |
| * wait queue for the firmware initialization to complete. |
| */ |
| int mwifiex_init_fw_complete(struct mwifiex_adapter *adapter) |
| { |
| |
| if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) |
| if (adapter->if_ops.init_fw_port) |
| adapter->if_ops.init_fw_port(adapter); |
| |
| adapter->init_wait_q_woken = true; |
| wake_up_interruptible(&adapter->init_wait_q); |
| return 0; |
| } |
| |
| /* |
| * Firmware shutdown complete callback handler. |
| * |
| * This function sets the hardware status to not ready and wakes up |
| * the function waiting on the init wait queue for the firmware |
| * shutdown to complete. |
| */ |
| int mwifiex_shutdown_fw_complete(struct mwifiex_adapter *adapter) |
| { |
| adapter->hw_status = MWIFIEX_HW_STATUS_NOT_READY; |
| adapter->init_wait_q_woken = true; |
| wake_up_interruptible(&adapter->init_wait_q); |
| return 0; |
| } |
| |
| /* |
| * This function sends init/shutdown command |
| * to firmware. |
| */ |
| int mwifiex_init_shutdown_fw(struct mwifiex_private *priv, |
| u32 func_init_shutdown) |
| { |
| u16 cmd; |
| |
| if (func_init_shutdown == MWIFIEX_FUNC_INIT) { |
| cmd = HostCmd_CMD_FUNC_INIT; |
| } else if (func_init_shutdown == MWIFIEX_FUNC_SHUTDOWN) { |
| cmd = HostCmd_CMD_FUNC_SHUTDOWN; |
| } else { |
| mwifiex_dbg(priv->adapter, ERROR, |
| "unsupported parameter\n"); |
| return -1; |
| } |
| |
| return mwifiex_send_cmd(priv, cmd, HostCmd_ACT_GEN_SET, 0, NULL, true); |
| } |
| EXPORT_SYMBOL_GPL(mwifiex_init_shutdown_fw); |
| |
| /* |
| * IOCTL request handler to set/get debug information. |
| * |
| * This function collates/sets the information from/to different driver |
| * structures. |
| */ |
| int mwifiex_get_debug_info(struct mwifiex_private *priv, |
| struct mwifiex_debug_info *info) |
| { |
| struct mwifiex_adapter *adapter = priv->adapter; |
| |
| if (info) { |
| info->debug_mask = adapter->debug_mask; |
| memcpy(info->packets_out, |
| priv->wmm.packets_out, |
| sizeof(priv->wmm.packets_out)); |
| info->curr_tx_buf_size = (u32) adapter->curr_tx_buf_size; |
| info->tx_buf_size = (u32) adapter->tx_buf_size; |
| info->rx_tbl_num = mwifiex_get_rx_reorder_tbl(priv, |
| info->rx_tbl); |
| info->tx_tbl_num = mwifiex_get_tx_ba_stream_tbl(priv, |
| info->tx_tbl); |
| info->tdls_peer_num = mwifiex_get_tdls_list(priv, |
| info->tdls_list); |
| info->ps_mode = adapter->ps_mode; |
| info->ps_state = adapter->ps_state; |
| info->is_deep_sleep = adapter->is_deep_sleep; |
| info->pm_wakeup_card_req = adapter->pm_wakeup_card_req; |
| info->pm_wakeup_fw_try = adapter->pm_wakeup_fw_try; |
| info->is_hs_configured = adapter->is_hs_configured; |
| info->hs_activated = adapter->hs_activated; |
| info->is_cmd_timedout = adapter->is_cmd_timedout; |
| info->num_cmd_host_to_card_failure |
| = adapter->dbg.num_cmd_host_to_card_failure; |
| info->num_cmd_sleep_cfm_host_to_card_failure |
| = adapter->dbg.num_cmd_sleep_cfm_host_to_card_failure; |
| info->num_tx_host_to_card_failure |
| = adapter->dbg.num_tx_host_to_card_failure; |
| info->num_event_deauth = adapter->dbg.num_event_deauth; |
| info->num_event_disassoc = adapter->dbg.num_event_disassoc; |
| info->num_event_link_lost = adapter->dbg.num_event_link_lost; |
| info->num_cmd_deauth = adapter->dbg.num_cmd_deauth; |
| info->num_cmd_assoc_success = |
| adapter->dbg.num_cmd_assoc_success; |
| info->num_cmd_assoc_failure = |
| adapter->dbg.num_cmd_assoc_failure; |
| info->num_tx_timeout = adapter->dbg.num_tx_timeout; |
| info->timeout_cmd_id = adapter->dbg.timeout_cmd_id; |
| info->timeout_cmd_act = adapter->dbg.timeout_cmd_act; |
| memcpy(info->last_cmd_id, adapter->dbg.last_cmd_id, |
| sizeof(adapter->dbg.last_cmd_id)); |
| memcpy(info->last_cmd_act, adapter->dbg.last_cmd_act, |
| sizeof(adapter->dbg.last_cmd_act)); |
| info->last_cmd_index = adapter->dbg.last_cmd_index; |
| memcpy(info->last_cmd_resp_id, adapter->dbg.last_cmd_resp_id, |
| sizeof(adapter->dbg.last_cmd_resp_id)); |
| info->last_cmd_resp_index = adapter->dbg.last_cmd_resp_index; |
| memcpy(info->last_event, adapter->dbg.last_event, |
| sizeof(adapter->dbg.last_event)); |
| info->last_event_index = adapter->dbg.last_event_index; |
| info->data_sent = adapter->data_sent; |
| info->cmd_sent = adapter->cmd_sent; |
| info->cmd_resp_received = adapter->cmd_resp_received; |
| } |
| |
| return 0; |
| } |
| |
| int mwifiex_debug_info_to_buffer(struct mwifiex_private *priv, char *buf, |
| struct mwifiex_debug_info *info) |
| { |
| char *p = buf; |
| struct mwifiex_debug_data *d = &items[0]; |
| size_t size, addr; |
| long val; |
| int i, j; |
| |
| if (!info) |
| return 0; |
| |
| for (i = 0; i < num_of_items; i++) { |
| p += sprintf(p, "%s=", d[i].name); |
| |
| size = d[i].size / d[i].num; |
| |
| if (i < (num_of_items - 3)) |
| addr = d[i].addr + (size_t)info; |
| else /* The last 3 items are struct mwifiex_adapter variables */ |
| addr = d[i].addr + (size_t)priv->adapter; |
| |
| for (j = 0; j < d[i].num; j++) { |
| switch (size) { |
| case 1: |
| val = *((u8 *)addr); |
| break; |
| case 2: |
| val = *((u16 *)addr); |
| break; |
| case 4: |
| val = *((u32 *)addr); |
| break; |
| case 8: |
| val = *((long long *)addr); |
| break; |
| default: |
| val = -1; |
| break; |
| } |
| |
| p += sprintf(p, "%#lx ", val); |
| addr += size; |
| } |
| |
| p += sprintf(p, "\n"); |
| } |
| |
| if (info->tx_tbl_num) { |
| p += sprintf(p, "Tx BA stream table:\n"); |
| for (i = 0; i < info->tx_tbl_num; i++) |
| p += sprintf(p, "tid = %d, ra = %pM\n", |
| info->tx_tbl[i].tid, info->tx_tbl[i].ra); |
| } |
| |
| if (info->rx_tbl_num) { |
| p += sprintf(p, "Rx reorder table:\n"); |
| for (i = 0; i < info->rx_tbl_num; i++) { |
| p += sprintf(p, "tid = %d, ta = %pM, ", |
| info->rx_tbl[i].tid, |
| info->rx_tbl[i].ta); |
| p += sprintf(p, "start_win = %d, ", |
| info->rx_tbl[i].start_win); |
| p += sprintf(p, "win_size = %d, buffer: ", |
| info->rx_tbl[i].win_size); |
| |
| for (j = 0; j < info->rx_tbl[i].win_size; j++) |
| p += sprintf(p, "%c ", |
| info->rx_tbl[i].buffer[j] ? |
| '1' : '0'); |
| |
| p += sprintf(p, "\n"); |
| } |
| } |
| |
| if (info->tdls_peer_num) { |
| p += sprintf(p, "TDLS peer table:\n"); |
| for (i = 0; i < info->tdls_peer_num; i++) { |
| p += sprintf(p, "peer = %pM", |
| info->tdls_list[i].peer_addr); |
| p += sprintf(p, "\n"); |
| } |
| } |
| |
| return p - buf; |
| } |
| |
| static int |
| mwifiex_parse_mgmt_packet(struct mwifiex_private *priv, u8 *payload, u16 len, |
| struct rxpd *rx_pd) |
| { |
| u16 stype; |
| u8 category, action_code, *addr2; |
| struct ieee80211_hdr *ieee_hdr = (void *)payload; |
| |
| stype = (le16_to_cpu(ieee_hdr->frame_control) & IEEE80211_FCTL_STYPE); |
| |
| switch (stype) { |
| case IEEE80211_STYPE_ACTION: |
| category = *(payload + sizeof(struct ieee80211_hdr)); |
| switch (category) { |
| case WLAN_CATEGORY_PUBLIC: |
| action_code = *(payload + sizeof(struct ieee80211_hdr) |
| + 1); |
| if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) { |
| addr2 = ieee_hdr->addr2; |
| mwifiex_dbg(priv->adapter, INFO, |
| "TDLS discovery response %pM nf=%d, snr=%d\n", |
| addr2, rx_pd->nf, rx_pd->snr); |
| mwifiex_auto_tdls_update_peer_signal(priv, |
| addr2, |
| rx_pd->snr, |
| rx_pd->nf); |
| } |
| break; |
| case WLAN_CATEGORY_BACK: |
| /*we dont indicate BACK action frames to cfg80211*/ |
| mwifiex_dbg(priv->adapter, INFO, |
| "drop BACK action frames"); |
| return -1; |
| default: |
| mwifiex_dbg(priv->adapter, INFO, |
| "unknown public action frame category %d\n", |
| category); |
| } |
| default: |
| mwifiex_dbg(priv->adapter, INFO, |
| "unknown mgmt frame subtype %#x\n", stype); |
| return 0; |
| } |
| |
| return 0; |
| } |
| /* |
| * This function processes the received management packet and send it |
| * to the kernel. |
| */ |
| int |
| mwifiex_process_mgmt_packet(struct mwifiex_private *priv, |
| struct sk_buff *skb) |
| { |
| struct rxpd *rx_pd; |
| u16 pkt_len; |
| struct ieee80211_hdr *ieee_hdr; |
| |
| if (!skb) |
| return -1; |
| |
| if (!priv->mgmt_frame_mask || |
| priv->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED) { |
| mwifiex_dbg(priv->adapter, ERROR, |
| "do not receive mgmt frames on uninitialized intf"); |
| return -1; |
| } |
| |
| rx_pd = (struct rxpd *)skb->data; |
| |
| skb_pull(skb, le16_to_cpu(rx_pd->rx_pkt_offset)); |
| skb_pull(skb, sizeof(pkt_len)); |
| |
| pkt_len = le16_to_cpu(rx_pd->rx_pkt_length); |
| |
| ieee_hdr = (void *)skb->data; |
| if (ieee80211_is_mgmt(ieee_hdr->frame_control)) { |
| if (mwifiex_parse_mgmt_packet(priv, (u8 *)ieee_hdr, |
| pkt_len, rx_pd)) |
| return -1; |
| } |
| /* Remove address4 */ |
| memmove(skb->data + sizeof(struct ieee80211_hdr_3addr), |
| skb->data + sizeof(struct ieee80211_hdr), |
| pkt_len - sizeof(struct ieee80211_hdr)); |
| |
| pkt_len -= ETH_ALEN + sizeof(pkt_len); |
| rx_pd->rx_pkt_length = cpu_to_le16(pkt_len); |
| |
| cfg80211_rx_mgmt(&priv->wdev, priv->roc_cfg.chan.center_freq, |
| CAL_RSSI(rx_pd->snr, rx_pd->nf), skb->data, pkt_len, |
| 0); |
| |
| return 0; |
| } |
| |
| /* |
| * This function processes the received packet before sending it to the |
| * kernel. |
| * |
| * It extracts the SKB from the received buffer and sends it to kernel. |
| * In case the received buffer does not contain the data in SKB format, |
| * the function creates a blank SKB, fills it with the data from the |
| * received buffer and then sends this new SKB to the kernel. |
| */ |
| int mwifiex_recv_packet(struct mwifiex_private *priv, struct sk_buff *skb) |
| { |
| struct mwifiex_sta_node *src_node; |
| struct ethhdr *p_ethhdr; |
| |
| if (!skb) |
| return -1; |
| |
| priv->stats.rx_bytes += skb->len; |
| priv->stats.rx_packets++; |
| |
| if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) { |
| p_ethhdr = (void *)skb->data; |
| src_node = mwifiex_get_sta_entry(priv, p_ethhdr->h_source); |
| if (src_node) { |
| src_node->stats.last_rx = jiffies; |
| src_node->stats.rx_bytes += skb->len; |
| src_node->stats.rx_packets++; |
| } |
| } |
| |
| skb->dev = priv->netdev; |
| skb->protocol = eth_type_trans(skb, priv->netdev); |
| skb->ip_summed = CHECKSUM_NONE; |
| |
| /* This is required only in case of 11n and USB/PCIE as we alloc |
| * a buffer of 4K only if its 11N (to be able to receive 4K |
| * AMSDU packets). In case of SD we allocate buffers based |
| * on the size of packet and hence this is not needed. |
| * |
| * Modifying the truesize here as our allocation for each |
| * skb is 4K but we only receive 2K packets and this cause |
| * the kernel to start dropping packets in case where |
| * application has allocated buffer based on 2K size i.e. |
| * if there a 64K packet received (in IP fragments and |
| * application allocates 64K to receive this packet but |
| * this packet would almost double up because we allocate |
| * each 1.5K fragment in 4K and pass it up. As soon as the |
| * 64K limit hits kernel will start to drop rest of the |
| * fragments. Currently we fail the Filesndl-ht.scr script |
| * for UDP, hence this fix |
| */ |
| if ((priv->adapter->iface_type == MWIFIEX_USB || |
| priv->adapter->iface_type == MWIFIEX_PCIE) && |
| (skb->truesize > MWIFIEX_RX_DATA_BUF_SIZE)) |
| skb->truesize += (skb->len - MWIFIEX_RX_DATA_BUF_SIZE); |
| |
| if (in_interrupt()) |
| netif_rx(skb); |
| else |
| netif_rx_ni(skb); |
| |
| return 0; |
| } |
| |
| /* |
| * IOCTL completion callback handler. |
| * |
| * This function is called when a pending IOCTL is completed. |
| * |
| * If work queue support is enabled, the function wakes up the |
| * corresponding waiting function. Otherwise, it processes the |
| * IOCTL response and frees the response buffer. |
| */ |
| int mwifiex_complete_cmd(struct mwifiex_adapter *adapter, |
| struct cmd_ctrl_node *cmd_node) |
| { |
| WARN_ON(!cmd_node->wait_q_enabled); |
| mwifiex_dbg(adapter, CMD, "cmd completed: status=%d\n", |
| adapter->cmd_wait_q.status); |
| |
| *cmd_node->condition = true; |
| wake_up_interruptible(&adapter->cmd_wait_q.wait); |
| |
| return 0; |
| } |
| |
| /* This function will return the pointer to station entry in station list |
| * table which matches specified mac address. |
| * This function should be called after acquiring RA list spinlock. |
| * NULL is returned if station entry is not found in associated STA list. |
| */ |
| struct mwifiex_sta_node * |
| mwifiex_get_sta_entry(struct mwifiex_private *priv, const u8 *mac) |
| { |
| struct mwifiex_sta_node *node; |
| |
| if (!mac) |
| return NULL; |
| |
| list_for_each_entry(node, &priv->sta_list, list) { |
| if (!memcmp(node->mac_addr, mac, ETH_ALEN)) |
| return node; |
| } |
| |
| return NULL; |
| } |
| |
| static struct mwifiex_sta_node * |
| mwifiex_get_tdls_sta_entry(struct mwifiex_private *priv, u8 status) |
| { |
| struct mwifiex_sta_node *node; |
| |
| list_for_each_entry(node, &priv->sta_list, list) { |
| if (node->tdls_status == status) |
| return node; |
| } |
| |
| return NULL; |
| } |
| |
| /* If tdls channel switching is on-going, tx data traffic should be |
| * blocked until the switching stage completed. |
| */ |
| u8 mwifiex_is_tdls_chan_switching(struct mwifiex_private *priv) |
| { |
| struct mwifiex_sta_node *sta_ptr; |
| |
| if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info)) |
| return false; |
| |
| sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_CHAN_SWITCHING); |
| if (sta_ptr) |
| return true; |
| |
| return false; |
| } |
| |
| u8 mwifiex_is_tdls_off_chan(struct mwifiex_private *priv) |
| { |
| struct mwifiex_sta_node *sta_ptr; |
| |
| if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info)) |
| return false; |
| |
| sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_IN_OFF_CHAN); |
| if (sta_ptr) |
| return true; |
| |
| return false; |
| } |
| |
| /* If tdls channel switching is on-going or tdls operate on off-channel, |
| * cmd path should be blocked until tdls switched to base-channel. |
| */ |
| u8 mwifiex_is_send_cmd_allowed(struct mwifiex_private *priv) |
| { |
| if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info)) |
| return true; |
| |
| if (mwifiex_is_tdls_chan_switching(priv) || |
| mwifiex_is_tdls_off_chan(priv)) |
| return false; |
| |
| return true; |
| } |
| |
| /* This function will add a sta_node entry to associated station list |
| * table with the given mac address. |
| * If entry exist already, existing entry is returned. |
| * If received mac address is NULL, NULL is returned. |
| */ |
| struct mwifiex_sta_node * |
| mwifiex_add_sta_entry(struct mwifiex_private *priv, const u8 *mac) |
| { |
| struct mwifiex_sta_node *node; |
| unsigned long flags; |
| |
| if (!mac) |
| return NULL; |
| |
| spin_lock_irqsave(&priv->sta_list_spinlock, flags); |
| node = mwifiex_get_sta_entry(priv, mac); |
| if (node) |
| goto done; |
| |
| node = kzalloc(sizeof(*node), GFP_ATOMIC); |
| if (!node) |
| goto done; |
| |
| memcpy(node->mac_addr, mac, ETH_ALEN); |
| list_add_tail(&node->list, &priv->sta_list); |
| |
| done: |
| spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); |
| return node; |
| } |
| |
| /* This function will search for HT IE in association request IEs |
| * and set station HT parameters accordingly. |
| */ |
| void |
| mwifiex_set_sta_ht_cap(struct mwifiex_private *priv, const u8 *ies, |
| int ies_len, struct mwifiex_sta_node *node) |
| { |
| struct ieee_types_header *ht_cap_ie; |
| const struct ieee80211_ht_cap *ht_cap; |
| |
| if (!ies) |
| return; |
| |
| ht_cap_ie = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies, |
| ies_len); |
| if (ht_cap_ie) { |
| ht_cap = (void *)(ht_cap_ie + 1); |
| node->is_11n_enabled = 1; |
| node->max_amsdu = le16_to_cpu(ht_cap->cap_info) & |
| IEEE80211_HT_CAP_MAX_AMSDU ? |
| MWIFIEX_TX_DATA_BUF_SIZE_8K : |
| MWIFIEX_TX_DATA_BUF_SIZE_4K; |
| } else { |
| node->is_11n_enabled = 0; |
| } |
| |
| return; |
| } |
| |
| /* This function will delete a station entry from station list */ |
| void mwifiex_del_sta_entry(struct mwifiex_private *priv, const u8 *mac) |
| { |
| struct mwifiex_sta_node *node; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&priv->sta_list_spinlock, flags); |
| |
| node = mwifiex_get_sta_entry(priv, mac); |
| if (node) { |
| list_del(&node->list); |
| kfree(node); |
| } |
| |
| spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); |
| return; |
| } |
| |
| /* This function will delete all stations from associated station list. */ |
| void mwifiex_del_all_sta_list(struct mwifiex_private *priv) |
| { |
| struct mwifiex_sta_node *node, *tmp; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&priv->sta_list_spinlock, flags); |
| |
| list_for_each_entry_safe(node, tmp, &priv->sta_list, list) { |
| list_del(&node->list); |
| kfree(node); |
| } |
| |
| INIT_LIST_HEAD(&priv->sta_list); |
| spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); |
| return; |
| } |
| |
| /* This function adds histogram data to histogram array*/ |
| void mwifiex_hist_data_add(struct mwifiex_private *priv, |
| u8 rx_rate, s8 snr, s8 nflr) |
| { |
| struct mwifiex_histogram_data *phist_data = priv->hist_data; |
| |
| if (atomic_read(&phist_data->num_samples) > MWIFIEX_HIST_MAX_SAMPLES) |
| mwifiex_hist_data_reset(priv); |
| mwifiex_hist_data_set(priv, rx_rate, snr, nflr); |
| } |
| |
| /* function to add histogram record */ |
| void mwifiex_hist_data_set(struct mwifiex_private *priv, u8 rx_rate, s8 snr, |
| s8 nflr) |
| { |
| struct mwifiex_histogram_data *phist_data = priv->hist_data; |
| |
| atomic_inc(&phist_data->num_samples); |
| atomic_inc(&phist_data->rx_rate[rx_rate]); |
| atomic_inc(&phist_data->snr[snr]); |
| atomic_inc(&phist_data->noise_flr[128 + nflr]); |
| atomic_inc(&phist_data->sig_str[nflr - snr]); |
| } |
| |
| /* function to reset histogram data during init/reset */ |
| void mwifiex_hist_data_reset(struct mwifiex_private *priv) |
| { |
| int ix; |
| struct mwifiex_histogram_data *phist_data = priv->hist_data; |
| |
| atomic_set(&phist_data->num_samples, 0); |
| for (ix = 0; ix < MWIFIEX_MAX_AC_RX_RATES; ix++) |
| atomic_set(&phist_data->rx_rate[ix], 0); |
| for (ix = 0; ix < MWIFIEX_MAX_SNR; ix++) |
| atomic_set(&phist_data->snr[ix], 0); |
| for (ix = 0; ix < MWIFIEX_MAX_NOISE_FLR; ix++) |
| atomic_set(&phist_data->noise_flr[ix], 0); |
| for (ix = 0; ix < MWIFIEX_MAX_SIG_STRENGTH; ix++) |
| atomic_set(&phist_data->sig_str[ix], 0); |
| } |
| |
| void *mwifiex_alloc_dma_align_buf(int rx_len, gfp_t flags) |
| { |
| struct sk_buff *skb; |
| int buf_len, pad; |
| |
| buf_len = rx_len + MWIFIEX_RX_HEADROOM + MWIFIEX_DMA_ALIGN_SZ; |
| |
| skb = __dev_alloc_skb(buf_len, flags); |
| |
| if (!skb) |
| return NULL; |
| |
| skb_reserve(skb, MWIFIEX_RX_HEADROOM); |
| |
| pad = MWIFIEX_ALIGN_ADDR(skb->data, MWIFIEX_DMA_ALIGN_SZ) - |
| (long)skb->data; |
| |
| skb_reserve(skb, pad); |
| |
| return skb; |
| } |
| EXPORT_SYMBOL_GPL(mwifiex_alloc_dma_align_buf); |