diff options
Diffstat (limited to 'drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c')
| -rw-r--r-- | drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c | 984 |
1 files changed, 984 insertions, 0 deletions
diff --git a/drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c b/drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c new file mode 100644 index 000000000..cbe4a200e --- /dev/null +++ b/drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c @@ -0,0 +1,984 @@ +/* + * NXP Wireless LAN device driver: 802.11n RX Re-ordering + * + * Copyright 2011-2020 NXP + * + * This software file (the "File") is distributed by NXP + * 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, + struct sk_buff *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) +{ + struct sk_buff_head list; + struct sk_buff *skb; + int pkt_to_send, i; + + __skb_queue_head_init(&list); + spin_lock_bh(&priv->rx_reorder_tbl_lock); + + 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) { + if (tbl->rx_reorder_ptr[i]) { + skb = tbl->rx_reorder_ptr[i]; + __skb_queue_tail(&list, skb); + tbl->rx_reorder_ptr[i] = NULL; + } + } + + /* + * 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_bh(&priv->rx_reorder_tbl_lock); + + while ((skb = __skb_dequeue(&list))) + mwifiex_11n_dispatch_pkt(priv, skb); +} + +/* + * 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) +{ + struct sk_buff_head list; + struct sk_buff *skb; + int i, j, xchg; + + __skb_queue_head_init(&list); + spin_lock_bh(&priv->rx_reorder_tbl_lock); + + for (i = 0; i < tbl->win_size; ++i) { + if (!tbl->rx_reorder_ptr[i]) + break; + skb = tbl->rx_reorder_ptr[i]; + __skb_queue_tail(&list, skb); + tbl->rx_reorder_ptr[i] = NULL; + } + + /* + * 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_bh(&priv->rx_reorder_tbl_lock); + + while ((skb = __skb_dequeue(&list))) + mwifiex_11n_dispatch_pkt(priv, skb); +} + +/* + * 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) +{ + int start_win; + + if (!tbl) + return; + + spin_lock_bh(&priv->adapter->rx_proc_lock); + priv->adapter->rx_locked = true; + if (priv->adapter->rx_processing) { + spin_unlock_bh(&priv->adapter->rx_proc_lock); + flush_workqueue(priv->adapter->rx_workqueue); + } else { + spin_unlock_bh(&priv->adapter->rx_proc_lock); + } + + 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_bh(&priv->rx_reorder_tbl_lock); + list_del(&tbl->list); + spin_unlock_bh(&priv->rx_reorder_tbl_lock); + + kfree(tbl->rx_reorder_ptr); + kfree(tbl); + + spin_lock_bh(&priv->adapter->rx_proc_lock); + priv->adapter->rx_locked = false; + spin_unlock_bh(&priv->adapter->rx_proc_lock); + +} + +/* + * 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; + + spin_lock_bh(&priv->rx_reorder_tbl_lock); + list_for_each_entry(tbl, &priv->rx_reorder_tbl_ptr, list) { + if (!memcmp(tbl->ta, ta, ETH_ALEN) && tbl->tid == tid) { + spin_unlock_bh(&priv->rx_reorder_tbl_lock); + return tbl; + } + } + spin_unlock_bh(&priv->rx_reorder_tbl_lock); + + 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; + + if (!ta) + return; + + spin_lock_bh(&priv->rx_reorder_tbl_lock); + list_for_each_entry_safe(tbl, tmp, &priv->rx_reorder_tbl_ptr, list) { + if (!memcmp(tbl->ta, ta, ETH_ALEN)) { + spin_unlock_bh(&priv->rx_reorder_tbl_lock); + mwifiex_del_rx_reorder_entry(priv, tbl); + spin_lock_bh(&priv->rx_reorder_tbl_lock); + } + } + spin_unlock_bh(&priv->rx_reorder_tbl_lock); + + 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; + int i; + + spin_lock_bh(&priv->rx_reorder_tbl_lock); + for (i = rx_reorder_tbl_ptr->win_size - 1; i >= 0; --i) { + if (rx_reorder_tbl_ptr->rx_reorder_ptr[i]) { + spin_unlock_bh(&priv->rx_reorder_tbl_lock); + return i; + } + } + spin_unlock_bh(&priv->rx_reorder_tbl_lock); + + 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(struct timer_list *t) +{ + struct reorder_tmr_cnxt *ctx = + from_timer(ctx, t, timer); + 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; + 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_bh(&priv->sta_list_spinlock); + 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_bh(&priv->sta_list_spinlock); + + 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 = kcalloc(win_size, sizeof(void *), + GFP_KERNEL); + if (!new_node->rx_reorder_ptr) { + kfree(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; + + timer_setup(&new_node->timer_context.timer, mwifiex_flush_data, 0); + + for (i = 0; i < win_size; ++i) + new_node->rx_reorder_ptr[i] = NULL; + + spin_lock_bh(&priv->rx_reorder_tbl_lock); + list_add_tail(&new_node->list, &priv->rx_reorder_tbl_ptr); + spin_unlock_bh(&priv->rx_reorder_tbl_lock); +} + +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; + 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_bh(&priv->sta_list_spinlock); + sta_ptr = mwifiex_get_sta_entry(priv, + cmd_addba_req->peer_mac_addr); + if (!sta_ptr) { + spin_unlock_bh(&priv->sta_list_spinlock); + 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_bh(&priv->sta_list_spinlock); + } + + 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; + 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_bh(&priv->tx_ba_stream_tbl_lock); + mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, ptx_tbl); + spin_unlock_bh(&priv->tx_ba_stream_tbl_lock); + } +} + +/* + * 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; + + spin_lock_bh(&priv->rx_reorder_tbl_lock); + list_for_each_entry_safe(del_tbl_ptr, tmp_node, + &priv->rx_reorder_tbl_ptr, list) { + spin_unlock_bh(&priv->rx_reorder_tbl_lock); + mwifiex_del_rx_reorder_entry(priv, del_tbl_ptr); + spin_lock_bh(&priv->rx_reorder_tbl_lock); + } + INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr); + spin_unlock_bh(&priv->rx_reorder_tbl_lock); + + 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; + int i; + + for (i = 0; i < adapter->priv_num; i++) { + priv = adapter->priv[i]; + if (!priv) + continue; + + spin_lock_bh(&priv->rx_reorder_tbl_lock); + list_for_each_entry(tbl, &priv->rx_reorder_tbl_ptr, list) + tbl->flags = flags; + spin_unlock_bh(&priv->rx_reorder_tbl_lock); + } + + 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->header) + tlv_len); + tmp = (u8 *)tlv_rxba + sizeof(tlv_rxba->header) + tlv_len; + tlv_rxba = (struct mwifiex_ie_types_rxba_sync *)tmp; + } +} |