--- /dev/null
+/*
+ * 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, false);
+
+ while (!skb_queue_empty(&list)) {
+ rx_skb = __skb_dequeue(&list);
+ ret = mwifiex_recv_packet(priv, rx_skb);
+ if (ret == -1)
+ dev_err(priv->adapter->dev,
+ "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 = 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;
+
+ dev_dbg(ctx->priv->adapter->dev, "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);
+
+ dev_dbg(priv->adapter->dev, "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);
+ dev_err(priv->adapter->dev,
+ "%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);
+ dev_warn(priv->adapter->dev,
+ "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) {
+ dev_dbg(priv->adapter->dev,
+ "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) {
+ dev_dbg(priv->adapter->dev,
+ "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 (((seq_num - win_size) + 1) >= 0)
+ start_win = (end_win - win_size) + 1;
+ else
+ start_win = (MAX_TID_VALUE - (win_size - seq_num)) + 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;
+
+ if (type == TYPE_DELBA_RECEIVE)
+ cleanup_rx_reorder_tbl = (initiator) ? true : false;
+ else
+ cleanup_rx_reorder_tbl = (initiator) ? false : true;
+
+ dev_dbg(priv->adapter->dev, "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) {
+ dev_dbg(priv->adapter->dev,
+ "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) {
+ dev_dbg(priv->adapter->dev,
+ "event: TID, RA not found in table\n");
+ return;
+ }
+ ra_list = mwifiex_wmm_get_ralist_node(priv, tid, 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) {
+ dev_err(priv->adapter->dev, "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;
+ }
+
+ dev_dbg(priv->adapter->dev,
+ "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;
+}
Code Review / kvmfornfv.git / blobdiff