| /* |
| * Marvell Wireless LAN device driver: 802.11n RX Re-ordering |
| * |
| * 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" |
| #include "11n_rxreorder.h" |
| |
| /* This function will dispatch amsdu packet and forward it to kernel/upper |
| * layer. |
| */ |
| static int mwifiex_11n_dispatch_amsdu_pkt(struct mwifiex_private *priv, |
| struct sk_buff *skb) |
| { |
| struct rxpd *local_rx_pd = (struct rxpd *)(skb->data); |
| int ret; |
| |
| if (le16_to_cpu(local_rx_pd->rx_pkt_type) == PKT_TYPE_AMSDU) { |
| struct sk_buff_head list; |
| struct sk_buff *rx_skb; |
| |
| __skb_queue_head_init(&list); |
| |
| skb_pull(skb, le16_to_cpu(local_rx_pd->rx_pkt_offset)); |
| skb_trim(skb, le16_to_cpu(local_rx_pd->rx_pkt_length)); |
| |
| ieee80211_amsdu_to_8023s(skb, &list, priv->curr_addr, |
| priv->wdev.iftype, 0, NULL, NULL); |
| |
| while (!skb_queue_empty(&list)) { |
| struct rx_packet_hdr *rx_hdr; |
| |
| rx_skb = __skb_dequeue(&list); |
| rx_hdr = (struct rx_packet_hdr *)rx_skb->data; |
| if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) && |
| ntohs(rx_hdr->eth803_hdr.h_proto) == ETH_P_TDLS) { |
| mwifiex_process_tdls_action_frame(priv, |
| (u8 *)rx_hdr, |
| skb->len); |
| } |
| |
| if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP) |
| ret = mwifiex_uap_recv_packet(priv, rx_skb); |
| else |
| ret = mwifiex_recv_packet(priv, rx_skb); |
| if (ret == -1) |
| mwifiex_dbg(priv->adapter, ERROR, |
| "Rx of A-MSDU failed"); |
| } |
| return 0; |
| } |
| |
| return -1; |
| } |
| |
| /* This function will process the rx packet and forward it to kernel/upper |
| * layer. |
| */ |
| static int mwifiex_11n_dispatch_pkt(struct mwifiex_private *priv, void *payload) |
| { |
| |
| int ret; |
| |
| if (!payload) { |
| mwifiex_dbg(priv->adapter, INFO, "info: fw drop data\n"); |
| return 0; |
| } |
| |
| ret = mwifiex_11n_dispatch_amsdu_pkt(priv, payload); |
| if (!ret) |
| return 0; |
| |
| if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP) |
| return mwifiex_handle_uap_rx_forward(priv, payload); |
| |
| return mwifiex_process_rx_packet(priv, payload); |
| } |
| |
| /* |
| * This function dispatches all packets in the Rx reorder table until the |
| * start window. |
| * |
| * There could be holes in the buffer, which are skipped by the function. |
| * Since the buffer is linear, the function uses rotation to simulate |
| * circular buffer. |
| */ |
| static void |
| mwifiex_11n_dispatch_pkt_until_start_win(struct mwifiex_private *priv, |
| struct mwifiex_rx_reorder_tbl *tbl, |
| int start_win) |
| { |
| int pkt_to_send, i; |
| void *rx_tmp_ptr; |
| unsigned long flags; |
| |
| pkt_to_send = (start_win > tbl->start_win) ? |
| min((start_win - tbl->start_win), tbl->win_size) : |
| tbl->win_size; |
| |
| for (i = 0; i < pkt_to_send; ++i) { |
| spin_lock_irqsave(&priv->rx_pkt_lock, flags); |
| rx_tmp_ptr = NULL; |
| if (tbl->rx_reorder_ptr[i]) { |
| rx_tmp_ptr = tbl->rx_reorder_ptr[i]; |
| tbl->rx_reorder_ptr[i] = NULL; |
| } |
| spin_unlock_irqrestore(&priv->rx_pkt_lock, flags); |
| if (rx_tmp_ptr) |
| mwifiex_11n_dispatch_pkt(priv, rx_tmp_ptr); |
| } |
| |
| spin_lock_irqsave(&priv->rx_pkt_lock, flags); |
| /* |
| * We don't have a circular buffer, hence use rotation to simulate |
| * circular buffer |
| */ |
| for (i = 0; i < tbl->win_size - pkt_to_send; ++i) { |
| tbl->rx_reorder_ptr[i] = tbl->rx_reorder_ptr[pkt_to_send + i]; |
| tbl->rx_reorder_ptr[pkt_to_send + i] = NULL; |
| } |
| |
| tbl->start_win = start_win; |
| spin_unlock_irqrestore(&priv->rx_pkt_lock, flags); |
| } |
| |
| /* |
| * This function dispatches all packets in the Rx reorder table until |
| * a hole is found. |
| * |
| * The start window is adjusted automatically when a hole is located. |
| * Since the buffer is linear, the function uses rotation to simulate |
| * circular buffer. |
| */ |
| static void |
| mwifiex_11n_scan_and_dispatch(struct mwifiex_private *priv, |
| struct mwifiex_rx_reorder_tbl *tbl) |
| { |
| int i, j, xchg; |
| void *rx_tmp_ptr; |
| unsigned long flags; |
| |
| for (i = 0; i < tbl->win_size; ++i) { |
| spin_lock_irqsave(&priv->rx_pkt_lock, flags); |
| if (!tbl->rx_reorder_ptr[i]) { |
| spin_unlock_irqrestore(&priv->rx_pkt_lock, flags); |
| break; |
| } |
| rx_tmp_ptr = tbl->rx_reorder_ptr[i]; |
| tbl->rx_reorder_ptr[i] = NULL; |
| spin_unlock_irqrestore(&priv->rx_pkt_lock, flags); |
| mwifiex_11n_dispatch_pkt(priv, rx_tmp_ptr); |
| } |
| |
| spin_lock_irqsave(&priv->rx_pkt_lock, flags); |
| /* |
| * We don't have a circular buffer, hence use rotation to simulate |
| * circular buffer |
| */ |
| if (i > 0) { |
| xchg = tbl->win_size - i; |
| for (j = 0; j < xchg; ++j) { |
| tbl->rx_reorder_ptr[j] = tbl->rx_reorder_ptr[i + j]; |
| tbl->rx_reorder_ptr[i + j] = NULL; |
| } |
| } |
| tbl->start_win = (tbl->start_win + i) & (MAX_TID_VALUE - 1); |
| spin_unlock_irqrestore(&priv->rx_pkt_lock, flags); |
| } |
| |
| /* |
| * This function deletes the Rx reorder table and frees the memory. |
| * |
| * The function stops the associated timer and dispatches all the |
| * pending packets in the Rx reorder table before deletion. |
| */ |
| static void |
| mwifiex_del_rx_reorder_entry(struct mwifiex_private *priv, |
| struct mwifiex_rx_reorder_tbl *tbl) |
| { |
| unsigned long flags; |
| int start_win; |
| |
| if (!tbl) |
| return; |
| |
| spin_lock_irqsave(&priv->adapter->rx_proc_lock, flags); |
| priv->adapter->rx_locked = true; |
| if (priv->adapter->rx_processing) { |
| spin_unlock_irqrestore(&priv->adapter->rx_proc_lock, flags); |
| flush_workqueue(priv->adapter->rx_workqueue); |
| } else { |
| spin_unlock_irqrestore(&priv->adapter->rx_proc_lock, flags); |
| } |
| |
| start_win = (tbl->start_win + tbl->win_size) & (MAX_TID_VALUE - 1); |
| mwifiex_11n_dispatch_pkt_until_start_win(priv, tbl, start_win); |
| |
| del_timer_sync(&tbl->timer_context.timer); |
| tbl->timer_context.timer_is_set = false; |
| |
| spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); |
| list_del(&tbl->list); |
| spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); |
| |
| kfree(tbl->rx_reorder_ptr); |
| kfree(tbl); |
| |
| spin_lock_irqsave(&priv->adapter->rx_proc_lock, flags); |
| priv->adapter->rx_locked = false; |
| spin_unlock_irqrestore(&priv->adapter->rx_proc_lock, flags); |
| |
| } |
| |
| /* |
| * This function returns the pointer to an entry in Rx reordering |
| * table which matches the given TA/TID pair. |
| */ |
| struct mwifiex_rx_reorder_tbl * |
| mwifiex_11n_get_rx_reorder_tbl(struct mwifiex_private *priv, int tid, u8 *ta) |
| { |
| struct mwifiex_rx_reorder_tbl *tbl; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); |
| list_for_each_entry(tbl, &priv->rx_reorder_tbl_ptr, list) { |
| if (!memcmp(tbl->ta, ta, ETH_ALEN) && tbl->tid == tid) { |
| spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, |
| flags); |
| return tbl; |
| } |
| } |
| spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); |
| |
| return NULL; |
| } |
| |
| /* This function retrieves the pointer to an entry in Rx reordering |
| * table which matches the given TA and deletes it. |
| */ |
| void mwifiex_11n_del_rx_reorder_tbl_by_ta(struct mwifiex_private *priv, u8 *ta) |
| { |
| struct mwifiex_rx_reorder_tbl *tbl, *tmp; |
| unsigned long flags; |
| |
| if (!ta) |
| return; |
| |
| spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); |
| list_for_each_entry_safe(tbl, tmp, &priv->rx_reorder_tbl_ptr, list) { |
| if (!memcmp(tbl->ta, ta, ETH_ALEN)) { |
| spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, |
| flags); |
| mwifiex_del_rx_reorder_entry(priv, tbl); |
| spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); |
| } |
| } |
| spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); |
| |
| return; |
| } |
| |
| /* |
| * This function finds the last sequence number used in the packets |
| * buffered in Rx reordering table. |
| */ |
| static int |
| mwifiex_11n_find_last_seq_num(struct reorder_tmr_cnxt *ctx) |
| { |
| struct mwifiex_rx_reorder_tbl *rx_reorder_tbl_ptr = ctx->ptr; |
| struct mwifiex_private *priv = ctx->priv; |
| unsigned long flags; |
| int i; |
| |
| spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); |
| for (i = rx_reorder_tbl_ptr->win_size - 1; i >= 0; --i) { |
| if (rx_reorder_tbl_ptr->rx_reorder_ptr[i]) { |
| spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, |
| flags); |
| return i; |
| } |
| } |
| spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); |
| |
| return -1; |
| } |
| |
| /* |
| * This function flushes all the packets in Rx reordering table. |
| * |
| * The function checks if any packets are currently buffered in the |
| * table or not. In case there are packets available, it dispatches |
| * them and then dumps the Rx reordering table. |
| */ |
| static void |
| mwifiex_flush_data(unsigned long context) |
| { |
| struct reorder_tmr_cnxt *ctx = |
| (struct reorder_tmr_cnxt *) context; |
| int start_win, seq_num; |
| |
| ctx->timer_is_set = false; |
| seq_num = mwifiex_11n_find_last_seq_num(ctx); |
| |
| if (seq_num < 0) |
| return; |
| |
| mwifiex_dbg(ctx->priv->adapter, INFO, "info: flush data %d\n", seq_num); |
| start_win = (ctx->ptr->start_win + seq_num + 1) & (MAX_TID_VALUE - 1); |
| mwifiex_11n_dispatch_pkt_until_start_win(ctx->priv, ctx->ptr, |
| start_win); |
| } |
| |
| /* |
| * This function creates an entry in Rx reordering table for the |
| * given TA/TID. |
| * |
| * The function also initializes the entry with sequence number, window |
| * size as well as initializes the timer. |
| * |
| * If the received TA/TID pair is already present, all the packets are |
| * dispatched and the window size is moved until the SSN. |
| */ |
| static void |
| mwifiex_11n_create_rx_reorder_tbl(struct mwifiex_private *priv, u8 *ta, |
| int tid, int win_size, int seq_num) |
| { |
| int i; |
| struct mwifiex_rx_reorder_tbl *tbl, *new_node; |
| u16 last_seq = 0; |
| unsigned long flags; |
| struct mwifiex_sta_node *node; |
| |
| /* |
| * If we get a TID, ta pair which is already present dispatch all the |
| * the packets and move the window size until the ssn |
| */ |
| tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, ta); |
| if (tbl) { |
| mwifiex_11n_dispatch_pkt_until_start_win(priv, tbl, seq_num); |
| return; |
| } |
| /* if !tbl then create one */ |
| new_node = kzalloc(sizeof(struct mwifiex_rx_reorder_tbl), GFP_KERNEL); |
| if (!new_node) |
| return; |
| |
| INIT_LIST_HEAD(&new_node->list); |
| new_node->tid = tid; |
| memcpy(new_node->ta, ta, ETH_ALEN); |
| new_node->start_win = seq_num; |
| new_node->init_win = seq_num; |
| new_node->flags = 0; |
| |
| spin_lock_irqsave(&priv->sta_list_spinlock, flags); |
| if (mwifiex_queuing_ra_based(priv)) { |
| if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP) { |
| node = mwifiex_get_sta_entry(priv, ta); |
| if (node) |
| last_seq = node->rx_seq[tid]; |
| } |
| } else { |
| node = mwifiex_get_sta_entry(priv, ta); |
| if (node) |
| last_seq = node->rx_seq[tid]; |
| else |
| last_seq = priv->rx_seq[tid]; |
| } |
| spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); |
| |
| mwifiex_dbg(priv->adapter, INFO, |
| "info: last_seq=%d start_win=%d\n", |
| last_seq, new_node->start_win); |
| |
| if (last_seq != MWIFIEX_DEF_11N_RX_SEQ_NUM && |
| last_seq >= new_node->start_win) { |
| new_node->start_win = last_seq + 1; |
| new_node->flags |= RXREOR_INIT_WINDOW_SHIFT; |
| } |
| |
| new_node->win_size = win_size; |
| |
| new_node->rx_reorder_ptr = kzalloc(sizeof(void *) * win_size, |
| GFP_KERNEL); |
| if (!new_node->rx_reorder_ptr) { |
| kfree((u8 *) new_node); |
| mwifiex_dbg(priv->adapter, ERROR, |
| "%s: failed to alloc reorder_ptr\n", __func__); |
| return; |
| } |
| |
| new_node->timer_context.ptr = new_node; |
| new_node->timer_context.priv = priv; |
| new_node->timer_context.timer_is_set = false; |
| |
| setup_timer(&new_node->timer_context.timer, mwifiex_flush_data, |
| (unsigned long)&new_node->timer_context); |
| |
| for (i = 0; i < win_size; ++i) |
| new_node->rx_reorder_ptr[i] = NULL; |
| |
| spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); |
| list_add_tail(&new_node->list, &priv->rx_reorder_tbl_ptr); |
| spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); |
| } |
| |
| static void |
| mwifiex_11n_rxreorder_timer_restart(struct mwifiex_rx_reorder_tbl *tbl) |
| { |
| u32 min_flush_time; |
| |
| if (tbl->win_size >= MWIFIEX_BA_WIN_SIZE_32) |
| min_flush_time = MIN_FLUSH_TIMER_15_MS; |
| else |
| min_flush_time = MIN_FLUSH_TIMER_MS; |
| |
| mod_timer(&tbl->timer_context.timer, |
| jiffies + msecs_to_jiffies(min_flush_time * tbl->win_size)); |
| |
| tbl->timer_context.timer_is_set = true; |
| } |
| |
| /* |
| * This function prepares command for adding a BA request. |
| * |
| * Preparation includes - |
| * - Setting command ID and proper size |
| * - Setting add BA request buffer |
| * - Ensuring correct endian-ness |
| */ |
| int mwifiex_cmd_11n_addba_req(struct host_cmd_ds_command *cmd, void *data_buf) |
| { |
| struct host_cmd_ds_11n_addba_req *add_ba_req = &cmd->params.add_ba_req; |
| |
| cmd->command = cpu_to_le16(HostCmd_CMD_11N_ADDBA_REQ); |
| cmd->size = cpu_to_le16(sizeof(*add_ba_req) + S_DS_GEN); |
| memcpy(add_ba_req, data_buf, sizeof(*add_ba_req)); |
| |
| return 0; |
| } |
| |
| /* |
| * This function prepares command for adding a BA response. |
| * |
| * Preparation includes - |
| * - Setting command ID and proper size |
| * - Setting add BA response buffer |
| * - Ensuring correct endian-ness |
| */ |
| int mwifiex_cmd_11n_addba_rsp_gen(struct mwifiex_private *priv, |
| struct host_cmd_ds_command *cmd, |
| struct host_cmd_ds_11n_addba_req |
| *cmd_addba_req) |
| { |
| struct host_cmd_ds_11n_addba_rsp *add_ba_rsp = &cmd->params.add_ba_rsp; |
| struct mwifiex_sta_node *sta_ptr; |
| u32 rx_win_size = priv->add_ba_param.rx_win_size; |
| u8 tid; |
| int win_size; |
| unsigned long flags; |
| uint16_t block_ack_param_set; |
| |
| if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) && |
| ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) && |
| priv->adapter->is_hw_11ac_capable && |
| memcmp(priv->cfg_bssid, cmd_addba_req->peer_mac_addr, ETH_ALEN)) { |
| spin_lock_irqsave(&priv->sta_list_spinlock, flags); |
| sta_ptr = mwifiex_get_sta_entry(priv, |
| cmd_addba_req->peer_mac_addr); |
| if (!sta_ptr) { |
| spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); |
| mwifiex_dbg(priv->adapter, ERROR, |
| "BA setup with unknown TDLS peer %pM!\n", |
| cmd_addba_req->peer_mac_addr); |
| return -1; |
| } |
| if (sta_ptr->is_11ac_enabled) |
| rx_win_size = MWIFIEX_11AC_STA_AMPDU_DEF_RXWINSIZE; |
| spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); |
| } |
| |
| cmd->command = cpu_to_le16(HostCmd_CMD_11N_ADDBA_RSP); |
| cmd->size = cpu_to_le16(sizeof(*add_ba_rsp) + S_DS_GEN); |
| |
| memcpy(add_ba_rsp->peer_mac_addr, cmd_addba_req->peer_mac_addr, |
| ETH_ALEN); |
| add_ba_rsp->dialog_token = cmd_addba_req->dialog_token; |
| add_ba_rsp->block_ack_tmo = cmd_addba_req->block_ack_tmo; |
| add_ba_rsp->ssn = cmd_addba_req->ssn; |
| |
| block_ack_param_set = le16_to_cpu(cmd_addba_req->block_ack_param_set); |
| tid = (block_ack_param_set & IEEE80211_ADDBA_PARAM_TID_MASK) |
| >> BLOCKACKPARAM_TID_POS; |
| add_ba_rsp->status_code = cpu_to_le16(ADDBA_RSP_STATUS_ACCEPT); |
| block_ack_param_set &= ~IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK; |
| |
| /* If we don't support AMSDU inside AMPDU, reset the bit */ |
| if (!priv->add_ba_param.rx_amsdu || |
| (priv->aggr_prio_tbl[tid].amsdu == BA_STREAM_NOT_ALLOWED)) |
| block_ack_param_set &= ~BLOCKACKPARAM_AMSDU_SUPP_MASK; |
| block_ack_param_set |= rx_win_size << BLOCKACKPARAM_WINSIZE_POS; |
| add_ba_rsp->block_ack_param_set = cpu_to_le16(block_ack_param_set); |
| win_size = (le16_to_cpu(add_ba_rsp->block_ack_param_set) |
| & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) |
| >> BLOCKACKPARAM_WINSIZE_POS; |
| cmd_addba_req->block_ack_param_set = cpu_to_le16(block_ack_param_set); |
| |
| mwifiex_11n_create_rx_reorder_tbl(priv, cmd_addba_req->peer_mac_addr, |
| tid, win_size, |
| le16_to_cpu(cmd_addba_req->ssn)); |
| return 0; |
| } |
| |
| /* |
| * This function prepares command for deleting a BA request. |
| * |
| * Preparation includes - |
| * - Setting command ID and proper size |
| * - Setting del BA request buffer |
| * - Ensuring correct endian-ness |
| */ |
| int mwifiex_cmd_11n_delba(struct host_cmd_ds_command *cmd, void *data_buf) |
| { |
| struct host_cmd_ds_11n_delba *del_ba = &cmd->params.del_ba; |
| |
| cmd->command = cpu_to_le16(HostCmd_CMD_11N_DELBA); |
| cmd->size = cpu_to_le16(sizeof(*del_ba) + S_DS_GEN); |
| memcpy(del_ba, data_buf, sizeof(*del_ba)); |
| |
| return 0; |
| } |
| |
| /* |
| * This function identifies if Rx reordering is needed for a received packet. |
| * |
| * In case reordering is required, the function will do the reordering |
| * before sending it to kernel. |
| * |
| * The Rx reorder table is checked first with the received TID/TA pair. If |
| * not found, the received packet is dispatched immediately. But if found, |
| * the packet is reordered and all the packets in the updated Rx reordering |
| * table is dispatched until a hole is found. |
| * |
| * For sequence number less than the starting window, the packet is dropped. |
| */ |
| int mwifiex_11n_rx_reorder_pkt(struct mwifiex_private *priv, |
| u16 seq_num, u16 tid, |
| u8 *ta, u8 pkt_type, void *payload) |
| { |
| struct mwifiex_rx_reorder_tbl *tbl; |
| int prev_start_win, start_win, end_win, win_size; |
| u16 pkt_index; |
| bool init_window_shift = false; |
| int ret = 0; |
| |
| tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, ta); |
| if (!tbl) { |
| if (pkt_type != PKT_TYPE_BAR) |
| mwifiex_11n_dispatch_pkt(priv, payload); |
| return ret; |
| } |
| |
| if ((pkt_type == PKT_TYPE_AMSDU) && !tbl->amsdu) { |
| mwifiex_11n_dispatch_pkt(priv, payload); |
| return ret; |
| } |
| |
| start_win = tbl->start_win; |
| prev_start_win = start_win; |
| win_size = tbl->win_size; |
| end_win = ((start_win + win_size) - 1) & (MAX_TID_VALUE - 1); |
| if (tbl->flags & RXREOR_INIT_WINDOW_SHIFT) { |
| init_window_shift = true; |
| tbl->flags &= ~RXREOR_INIT_WINDOW_SHIFT; |
| } |
| |
| if (tbl->flags & RXREOR_FORCE_NO_DROP) { |
| mwifiex_dbg(priv->adapter, INFO, |
| "RXREOR_FORCE_NO_DROP when HS is activated\n"); |
| tbl->flags &= ~RXREOR_FORCE_NO_DROP; |
| } else if (init_window_shift && seq_num < start_win && |
| seq_num >= tbl->init_win) { |
| mwifiex_dbg(priv->adapter, INFO, |
| "Sender TID sequence number reset %d->%d for SSN %d\n", |
| start_win, seq_num, tbl->init_win); |
| tbl->start_win = start_win = seq_num; |
| end_win = ((start_win + win_size) - 1) & (MAX_TID_VALUE - 1); |
| } else { |
| /* |
| * If seq_num is less then starting win then ignore and drop |
| * the packet |
| */ |
| if ((start_win + TWOPOW11) > (MAX_TID_VALUE - 1)) { |
| if (seq_num >= ((start_win + TWOPOW11) & |
| (MAX_TID_VALUE - 1)) && |
| seq_num < start_win) { |
| ret = -1; |
| goto done; |
| } |
| } else if ((seq_num < start_win) || |
| (seq_num >= (start_win + TWOPOW11))) { |
| ret = -1; |
| goto done; |
| } |
| } |
| |
| /* |
| * If this packet is a BAR we adjust seq_num as |
| * WinStart = seq_num |
| */ |
| if (pkt_type == PKT_TYPE_BAR) |
| seq_num = ((seq_num + win_size) - 1) & (MAX_TID_VALUE - 1); |
| |
| if (((end_win < start_win) && |
| (seq_num < start_win) && (seq_num > end_win)) || |
| ((end_win > start_win) && ((seq_num > end_win) || |
| (seq_num < start_win)))) { |
| end_win = seq_num; |
| if (((end_win - win_size) + 1) >= 0) |
| start_win = (end_win - win_size) + 1; |
| else |
| start_win = (MAX_TID_VALUE - (win_size - end_win)) + 1; |
| mwifiex_11n_dispatch_pkt_until_start_win(priv, tbl, start_win); |
| } |
| |
| if (pkt_type != PKT_TYPE_BAR) { |
| if (seq_num >= start_win) |
| pkt_index = seq_num - start_win; |
| else |
| pkt_index = (seq_num+MAX_TID_VALUE) - start_win; |
| |
| if (tbl->rx_reorder_ptr[pkt_index]) { |
| ret = -1; |
| goto done; |
| } |
| |
| tbl->rx_reorder_ptr[pkt_index] = payload; |
| } |
| |
| /* |
| * Dispatch all packets sequentially from start_win until a |
| * hole is found and adjust the start_win appropriately |
| */ |
| mwifiex_11n_scan_and_dispatch(priv, tbl); |
| |
| done: |
| if (!tbl->timer_context.timer_is_set || |
| prev_start_win != tbl->start_win) |
| mwifiex_11n_rxreorder_timer_restart(tbl); |
| return ret; |
| } |
| |
| /* |
| * This function deletes an entry for a given TID/TA pair. |
| * |
| * The TID/TA are taken from del BA event body. |
| */ |
| void |
| mwifiex_del_ba_tbl(struct mwifiex_private *priv, int tid, u8 *peer_mac, |
| u8 type, int initiator) |
| { |
| struct mwifiex_rx_reorder_tbl *tbl; |
| struct mwifiex_tx_ba_stream_tbl *ptx_tbl; |
| struct mwifiex_ra_list_tbl *ra_list; |
| u8 cleanup_rx_reorder_tbl; |
| unsigned long flags; |
| int tid_down; |
| |
| if (type == TYPE_DELBA_RECEIVE) |
| cleanup_rx_reorder_tbl = (initiator) ? true : false; |
| else |
| cleanup_rx_reorder_tbl = (initiator) ? false : true; |
| |
| mwifiex_dbg(priv->adapter, EVENT, "event: DELBA: %pM tid=%d initiator=%d\n", |
| peer_mac, tid, initiator); |
| |
| if (cleanup_rx_reorder_tbl) { |
| tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, |
| peer_mac); |
| if (!tbl) { |
| mwifiex_dbg(priv->adapter, EVENT, |
| "event: TID, TA not found in table\n"); |
| return; |
| } |
| mwifiex_del_rx_reorder_entry(priv, tbl); |
| } else { |
| ptx_tbl = mwifiex_get_ba_tbl(priv, tid, peer_mac); |
| if (!ptx_tbl) { |
| mwifiex_dbg(priv->adapter, EVENT, |
| "event: TID, RA not found in table\n"); |
| return; |
| } |
| |
| tid_down = mwifiex_wmm_downgrade_tid(priv, tid); |
| ra_list = mwifiex_wmm_get_ralist_node(priv, tid_down, peer_mac); |
| if (ra_list) { |
| ra_list->amsdu_in_ampdu = false; |
| ra_list->ba_status = BA_SETUP_NONE; |
| } |
| spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags); |
| mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, ptx_tbl); |
| spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags); |
| } |
| } |
| |
| /* |
| * This function handles the command response of an add BA response. |
| * |
| * Handling includes changing the header fields into CPU format and |
| * creating the stream, provided the add BA is accepted. |
| */ |
| int mwifiex_ret_11n_addba_resp(struct mwifiex_private *priv, |
| struct host_cmd_ds_command *resp) |
| { |
| struct host_cmd_ds_11n_addba_rsp *add_ba_rsp = &resp->params.add_ba_rsp; |
| int tid, win_size; |
| struct mwifiex_rx_reorder_tbl *tbl; |
| uint16_t block_ack_param_set; |
| |
| block_ack_param_set = le16_to_cpu(add_ba_rsp->block_ack_param_set); |
| |
| tid = (block_ack_param_set & IEEE80211_ADDBA_PARAM_TID_MASK) |
| >> BLOCKACKPARAM_TID_POS; |
| /* |
| * Check if we had rejected the ADDBA, if yes then do not create |
| * the stream |
| */ |
| if (le16_to_cpu(add_ba_rsp->status_code) != BA_RESULT_SUCCESS) { |
| mwifiex_dbg(priv->adapter, ERROR, "ADDBA RSP: failed %pM tid=%d)\n", |
| add_ba_rsp->peer_mac_addr, tid); |
| |
| tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, |
| add_ba_rsp->peer_mac_addr); |
| if (tbl) |
| mwifiex_del_rx_reorder_entry(priv, tbl); |
| |
| return 0; |
| } |
| |
| win_size = (block_ack_param_set & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) |
| >> BLOCKACKPARAM_WINSIZE_POS; |
| |
| tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, |
| add_ba_rsp->peer_mac_addr); |
| if (tbl) { |
| if ((block_ack_param_set & BLOCKACKPARAM_AMSDU_SUPP_MASK) && |
| priv->add_ba_param.rx_amsdu && |
| (priv->aggr_prio_tbl[tid].amsdu != BA_STREAM_NOT_ALLOWED)) |
| tbl->amsdu = true; |
| else |
| tbl->amsdu = false; |
| } |
| |
| mwifiex_dbg(priv->adapter, CMD, |
| "cmd: ADDBA RSP: %pM tid=%d ssn=%d win_size=%d\n", |
| add_ba_rsp->peer_mac_addr, tid, add_ba_rsp->ssn, win_size); |
| |
| return 0; |
| } |
| |
| /* |
| * This function handles BA stream timeout event by preparing and sending |
| * a command to the firmware. |
| */ |
| void mwifiex_11n_ba_stream_timeout(struct mwifiex_private *priv, |
| struct host_cmd_ds_11n_batimeout *event) |
| { |
| struct host_cmd_ds_11n_delba delba; |
| |
| memset(&delba, 0, sizeof(struct host_cmd_ds_11n_delba)); |
| memcpy(delba.peer_mac_addr, event->peer_mac_addr, ETH_ALEN); |
| |
| delba.del_ba_param_set |= |
| cpu_to_le16((u16) event->tid << DELBA_TID_POS); |
| delba.del_ba_param_set |= cpu_to_le16( |
| (u16) event->origninator << DELBA_INITIATOR_POS); |
| delba.reason_code = cpu_to_le16(WLAN_REASON_QSTA_TIMEOUT); |
| mwifiex_send_cmd(priv, HostCmd_CMD_11N_DELBA, 0, 0, &delba, false); |
| } |
| |
| /* |
| * This function cleans up the Rx reorder table by deleting all the entries |
| * and re-initializing. |
| */ |
| void mwifiex_11n_cleanup_reorder_tbl(struct mwifiex_private *priv) |
| { |
| struct mwifiex_rx_reorder_tbl *del_tbl_ptr, *tmp_node; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); |
| list_for_each_entry_safe(del_tbl_ptr, tmp_node, |
| &priv->rx_reorder_tbl_ptr, list) { |
| spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); |
| mwifiex_del_rx_reorder_entry(priv, del_tbl_ptr); |
| spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); |
| } |
| INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr); |
| spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); |
| |
| mwifiex_reset_11n_rx_seq_num(priv); |
| } |
| |
| /* |
| * This function updates all rx_reorder_tbl's flags. |
| */ |
| void mwifiex_update_rxreor_flags(struct mwifiex_adapter *adapter, u8 flags) |
| { |
| struct mwifiex_private *priv; |
| struct mwifiex_rx_reorder_tbl *tbl; |
| unsigned long lock_flags; |
| int i; |
| |
| for (i = 0; i < adapter->priv_num; i++) { |
| priv = adapter->priv[i]; |
| if (!priv) |
| continue; |
| |
| spin_lock_irqsave(&priv->rx_reorder_tbl_lock, lock_flags); |
| if (list_empty(&priv->rx_reorder_tbl_ptr)) { |
| spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, |
| lock_flags); |
| continue; |
| } |
| |
| list_for_each_entry(tbl, &priv->rx_reorder_tbl_ptr, list) |
| tbl->flags = flags; |
| spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, lock_flags); |
| } |
| |
| return; |
| } |
| |
| /* This function update all the rx_win_size based on coex flag |
| */ |
| static void mwifiex_update_ampdu_rxwinsize(struct mwifiex_adapter *adapter, |
| bool coex_flag) |
| { |
| u8 i; |
| u32 rx_win_size; |
| struct mwifiex_private *priv; |
| |
| dev_dbg(adapter->dev, "Update rxwinsize %d\n", coex_flag); |
| |
| for (i = 0; i < adapter->priv_num; i++) { |
| if (!adapter->priv[i]) |
| continue; |
| priv = adapter->priv[i]; |
| rx_win_size = priv->add_ba_param.rx_win_size; |
| if (coex_flag) { |
| if (priv->bss_type == MWIFIEX_BSS_TYPE_STA) |
| priv->add_ba_param.rx_win_size = |
| MWIFIEX_STA_COEX_AMPDU_DEF_RXWINSIZE; |
| if (priv->bss_type == MWIFIEX_BSS_TYPE_P2P) |
| priv->add_ba_param.rx_win_size = |
| MWIFIEX_STA_COEX_AMPDU_DEF_RXWINSIZE; |
| if (priv->bss_type == MWIFIEX_BSS_TYPE_UAP) |
| priv->add_ba_param.rx_win_size = |
| MWIFIEX_UAP_COEX_AMPDU_DEF_RXWINSIZE; |
| } else { |
| if (priv->bss_type == MWIFIEX_BSS_TYPE_STA) |
| priv->add_ba_param.rx_win_size = |
| MWIFIEX_STA_AMPDU_DEF_RXWINSIZE; |
| if (priv->bss_type == MWIFIEX_BSS_TYPE_P2P) |
| priv->add_ba_param.rx_win_size = |
| MWIFIEX_STA_AMPDU_DEF_RXWINSIZE; |
| if (priv->bss_type == MWIFIEX_BSS_TYPE_UAP) |
| priv->add_ba_param.rx_win_size = |
| MWIFIEX_UAP_AMPDU_DEF_RXWINSIZE; |
| } |
| |
| if (adapter->coex_win_size && adapter->coex_rx_win_size) |
| priv->add_ba_param.rx_win_size = |
| adapter->coex_rx_win_size; |
| |
| if (rx_win_size != priv->add_ba_param.rx_win_size) { |
| if (!priv->media_connected) |
| continue; |
| for (i = 0; i < MAX_NUM_TID; i++) |
| mwifiex_11n_delba(priv, i); |
| } |
| } |
| } |
| |
| /* This function check coex for RX BA |
| */ |
| void mwifiex_coex_ampdu_rxwinsize(struct mwifiex_adapter *adapter) |
| { |
| u8 i; |
| struct mwifiex_private *priv; |
| u8 count = 0; |
| |
| for (i = 0; i < adapter->priv_num; i++) { |
| if (adapter->priv[i]) { |
| priv = adapter->priv[i]; |
| if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) { |
| if (priv->media_connected) |
| count++; |
| } |
| if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) { |
| if (priv->bss_started) |
| count++; |
| } |
| } |
| if (count >= MWIFIEX_BSS_COEX_COUNT) |
| break; |
| } |
| if (count >= MWIFIEX_BSS_COEX_COUNT) |
| mwifiex_update_ampdu_rxwinsize(adapter, true); |
| else |
| mwifiex_update_ampdu_rxwinsize(adapter, false); |
| } |
| |
| /* This function handles rxba_sync event |
| */ |
| void mwifiex_11n_rxba_sync_event(struct mwifiex_private *priv, |
| u8 *event_buf, u16 len) |
| { |
| struct mwifiex_ie_types_rxba_sync *tlv_rxba = (void *)event_buf; |
| u16 tlv_type, tlv_len; |
| struct mwifiex_rx_reorder_tbl *rx_reor_tbl_ptr; |
| u8 i, j; |
| u16 seq_num, tlv_seq_num, tlv_bitmap_len; |
| int tlv_buf_left = len; |
| int ret; |
| u8 *tmp; |
| |
| mwifiex_dbg_dump(priv->adapter, EVT_D, "RXBA_SYNC event:", |
| event_buf, len); |
| while (tlv_buf_left >= sizeof(*tlv_rxba)) { |
| tlv_type = le16_to_cpu(tlv_rxba->header.type); |
| tlv_len = le16_to_cpu(tlv_rxba->header.len); |
| if (tlv_type != TLV_TYPE_RXBA_SYNC) { |
| mwifiex_dbg(priv->adapter, ERROR, |
| "Wrong TLV id=0x%x\n", tlv_type); |
| return; |
| } |
| |
| tlv_seq_num = le16_to_cpu(tlv_rxba->seq_num); |
| tlv_bitmap_len = le16_to_cpu(tlv_rxba->bitmap_len); |
| mwifiex_dbg(priv->adapter, INFO, |
| "%pM tid=%d seq_num=%d bitmap_len=%d\n", |
| tlv_rxba->mac, tlv_rxba->tid, tlv_seq_num, |
| tlv_bitmap_len); |
| |
| rx_reor_tbl_ptr = |
| mwifiex_11n_get_rx_reorder_tbl(priv, tlv_rxba->tid, |
| tlv_rxba->mac); |
| if (!rx_reor_tbl_ptr) { |
| mwifiex_dbg(priv->adapter, ERROR, |
| "Can not find rx_reorder_tbl!"); |
| return; |
| } |
| |
| for (i = 0; i < tlv_bitmap_len; i++) { |
| for (j = 0 ; j < 8; j++) { |
| if (tlv_rxba->bitmap[i] & (1 << j)) { |
| seq_num = (MAX_TID_VALUE - 1) & |
| (tlv_seq_num + i * 8 + j); |
| |
| mwifiex_dbg(priv->adapter, ERROR, |
| "drop packet,seq=%d\n", |
| seq_num); |
| |
| ret = mwifiex_11n_rx_reorder_pkt |
| (priv, seq_num, tlv_rxba->tid, |
| tlv_rxba->mac, 0, NULL); |
| |
| if (ret) |
| mwifiex_dbg(priv->adapter, |
| ERROR, |
| "Fail to drop packet"); |
| } |
| } |
| } |
| |
| tlv_buf_left -= (sizeof(*tlv_rxba) + tlv_len); |
| tmp = (u8 *)tlv_rxba + tlv_len + sizeof(*tlv_rxba); |
| tlv_rxba = (struct mwifiex_ie_types_rxba_sync *)tmp; |
| } |
| } |