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path: root/drivers/net/wireless/mwifiex/11n_rxreorder.c
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Diffstat (limited to 'drivers/net/wireless/mwifiex/11n_rxreorder.c')
-rw-r--r--drivers/net/wireless/mwifiex/11n_rxreorder.c637
1 files changed, 637 insertions, 0 deletions
diff --git a/drivers/net/wireless/mwifiex/11n_rxreorder.c b/drivers/net/wireless/mwifiex/11n_rxreorder.c
new file mode 100644
index 000000000000..8e94e620e6f4
--- /dev/null
+++ b/drivers/net/wireless/mwifiex/11n_rxreorder.c
@@ -0,0 +1,637 @@
+/*
+ * Marvell Wireless LAN device driver: 802.11n RX Re-ordering
+ *
+ * Copyright (C) 2011, 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 processes a received packet and forwards
+ * it to the kernel/upper layer.
+ */
+static int mwifiex_11n_dispatch_pkt(struct mwifiex_private *priv, void *payload)
+{
+ int ret = 0;
+ struct mwifiex_adapter *adapter = priv->adapter;
+
+ ret = mwifiex_process_rx_packet(adapter, (struct sk_buff *) payload);
+ return ret;
+}
+
+/*
+ * This function dispatches all packets in the Rx reorder table.
+ *
+ * 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 int
+mwifiex_11n_dispatch_pkt_until_start_win(struct mwifiex_private *priv,
+ struct mwifiex_rx_reorder_tbl
+ *rx_reor_tbl_ptr, int start_win)
+{
+ int no_pkt_to_send, i, xchg;
+ void *rx_tmp_ptr = NULL;
+ unsigned long flags;
+
+ no_pkt_to_send = (start_win > rx_reor_tbl_ptr->start_win) ?
+ min((start_win - rx_reor_tbl_ptr->start_win),
+ rx_reor_tbl_ptr->win_size) : rx_reor_tbl_ptr->win_size;
+
+ for (i = 0; i < no_pkt_to_send; ++i) {
+ spin_lock_irqsave(&priv->rx_pkt_lock, flags);
+ rx_tmp_ptr = NULL;
+ if (rx_reor_tbl_ptr->rx_reorder_ptr[i]) {
+ rx_tmp_ptr = rx_reor_tbl_ptr->rx_reorder_ptr[i];
+ rx_reor_tbl_ptr->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
+ */
+ xchg = rx_reor_tbl_ptr->win_size - no_pkt_to_send;
+ for (i = 0; i < xchg; ++i) {
+ rx_reor_tbl_ptr->rx_reorder_ptr[i] =
+ rx_reor_tbl_ptr->rx_reorder_ptr[no_pkt_to_send + i];
+ rx_reor_tbl_ptr->rx_reorder_ptr[no_pkt_to_send + i] = NULL;
+ }
+
+ rx_reor_tbl_ptr->start_win = start_win;
+ spin_unlock_irqrestore(&priv->rx_pkt_lock, flags);
+
+ return 0;
+}
+
+/*
+ * 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 int
+mwifiex_11n_scan_and_dispatch(struct mwifiex_private *priv,
+ struct mwifiex_rx_reorder_tbl *rx_reor_tbl_ptr)
+{
+ int i, j, xchg;
+ void *rx_tmp_ptr = NULL;
+ unsigned long flags;
+
+ for (i = 0; i < rx_reor_tbl_ptr->win_size; ++i) {
+ spin_lock_irqsave(&priv->rx_pkt_lock, flags);
+ if (!rx_reor_tbl_ptr->rx_reorder_ptr[i]) {
+ spin_unlock_irqrestore(&priv->rx_pkt_lock, flags);
+ break;
+ }
+ rx_tmp_ptr = rx_reor_tbl_ptr->rx_reorder_ptr[i];
+ rx_reor_tbl_ptr->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 = rx_reor_tbl_ptr->win_size - i;
+ for (j = 0; j < xchg; ++j) {
+ rx_reor_tbl_ptr->rx_reorder_ptr[j] =
+ rx_reor_tbl_ptr->rx_reorder_ptr[i + j];
+ rx_reor_tbl_ptr->rx_reorder_ptr[i + j] = NULL;
+ }
+ }
+ rx_reor_tbl_ptr->start_win = (rx_reor_tbl_ptr->start_win + i)
+ &(MAX_TID_VALUE - 1);
+ spin_unlock_irqrestore(&priv->rx_pkt_lock, flags);
+ return 0;
+}
+
+/*
+ * 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_11n_delete_rx_reorder_tbl_entry(struct mwifiex_private *priv,
+ struct mwifiex_rx_reorder_tbl
+ *rx_reor_tbl_ptr)
+{
+ unsigned long flags;
+
+ if (!rx_reor_tbl_ptr)
+ return;
+
+ mwifiex_11n_dispatch_pkt_until_start_win(priv, rx_reor_tbl_ptr,
+ (rx_reor_tbl_ptr->start_win +
+ rx_reor_tbl_ptr->win_size)
+ &(MAX_TID_VALUE - 1));
+
+ del_timer(&rx_reor_tbl_ptr->timer_context.timer);
+
+ spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
+ list_del(&rx_reor_tbl_ptr->list);
+ spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
+
+ kfree(rx_reor_tbl_ptr->rx_reorder_ptr);
+ kfree(rx_reor_tbl_ptr);
+}
+
+/*
+ * This function returns the pointer to an entry in Rx reordering
+ * table which matches the given TA/TID pair.
+ */
+static struct mwifiex_rx_reorder_tbl *
+mwifiex_11n_get_rx_reorder_tbl(struct mwifiex_private *priv, int tid, u8 *ta)
+{
+ struct mwifiex_rx_reorder_tbl *rx_reor_tbl_ptr;
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
+ list_for_each_entry(rx_reor_tbl_ptr, &priv->rx_reorder_tbl_ptr, list) {
+ if ((!memcmp(rx_reor_tbl_ptr->ta, ta, ETH_ALEN))
+ && (rx_reor_tbl_ptr->tid == tid)) {
+ spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock,
+ flags);
+ return rx_reor_tbl_ptr;
+ }
+ }
+ spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
+
+ return NULL;
+}
+
+/*
+ * 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 mwifiex_rx_reorder_tbl *rx_reorder_tbl_ptr)
+{
+ int i;
+
+ for (i = (rx_reorder_tbl_ptr->win_size - 1); i >= 0; --i)
+ if (rx_reorder_tbl_ptr->rx_reorder_ptr[i])
+ return i;
+
+ 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 *reorder_cnxt =
+ (struct reorder_tmr_cnxt *) context;
+ int start_win;
+
+ start_win = mwifiex_11n_find_last_seq_num(reorder_cnxt->ptr);
+ if (start_win >= 0) {
+ dev_dbg(reorder_cnxt->priv->adapter->dev,
+ "info: flush data %d\n", start_win);
+ mwifiex_11n_dispatch_pkt_until_start_win(reorder_cnxt->priv,
+ reorder_cnxt->ptr,
+ ((reorder_cnxt->ptr->start_win +
+ start_win + 1) & (MAX_TID_VALUE - 1)));
+ }
+}
+
+/*
+ * 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 *rx_reor_tbl_ptr, *new_node;
+ u16 last_seq = 0;
+ unsigned long flags;
+
+ /*
+ * If we get a TID, ta pair which is already present dispatch all the
+ * the packets and move the window size until the ssn
+ */
+ rx_reor_tbl_ptr = mwifiex_11n_get_rx_reorder_tbl(priv, tid, ta);
+ if (rx_reor_tbl_ptr) {
+ mwifiex_11n_dispatch_pkt_until_start_win(priv, rx_reor_tbl_ptr,
+ seq_num);
+ return;
+ }
+ /* if !rx_reor_tbl_ptr then create one */
+ new_node = kzalloc(sizeof(struct mwifiex_rx_reorder_tbl), GFP_KERNEL);
+ if (!new_node) {
+ dev_err(priv->adapter->dev, "%s: failed to alloc new_node\n",
+ __func__);
+ return;
+ }
+
+ INIT_LIST_HEAD(&new_node->list);
+ new_node->tid = tid;
+ memcpy(new_node->ta, ta, ETH_ALEN);
+ new_node->start_win = seq_num;
+ if (mwifiex_queuing_ra_based(priv))
+ /* TODO for adhoc */
+ dev_dbg(priv->adapter->dev,
+ "info: ADHOC:last_seq=%d start_win=%d\n",
+ last_seq, new_node->start_win);
+ else
+ last_seq = priv->rx_seq[tid];
+
+ if (last_seq >= new_node->start_win)
+ new_node->start_win = last_seq + 1;
+
+ 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;
+
+ init_timer(&new_node->timer_context.timer);
+ new_node->timer_context.timer.function = mwifiex_flush_data;
+ new_node->timer_context.timer.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);
+
+ return;
+}
+
+/*
+ * 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 mwifiex_private *priv,
+ struct host_cmd_ds_command *cmd, void *data_buf)
+{
+ struct host_cmd_ds_11n_addba_req *add_ba_req =
+ (struct host_cmd_ds_11n_addba_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,
+ void *data_buf)
+{
+ struct host_cmd_ds_11n_addba_rsp *add_ba_rsp =
+ (struct host_cmd_ds_11n_addba_rsp *)
+ &cmd->params.add_ba_rsp;
+ struct host_cmd_ds_11n_addba_req *cmd_addba_req =
+ (struct host_cmd_ds_11n_addba_req *) data_buf;
+ u8 tid = 0;
+ int win_size = 0;
+ uint16_t block_ack_param_set;
+
+ 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;
+ /* We donot support AMSDU inside AMPDU, hence reset the bit */
+ block_ack_param_set &= ~BLOCKACKPARAM_AMSDU_SUPP_MASK;
+ block_ack_param_set |= (priv->add_ba_param.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 mwifiex_private *priv,
+ struct host_cmd_ds_command *cmd, void *data_buf)
+{
+ struct host_cmd_ds_11n_delba *del_ba = (struct host_cmd_ds_11n_delba *)
+ &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 *rx_reor_tbl_ptr;
+ int start_win, end_win, win_size;
+ int ret = 0;
+ u16 pkt_index = 0;
+
+ rx_reor_tbl_ptr =
+ mwifiex_11n_get_rx_reorder_tbl((struct mwifiex_private *) priv,
+ tid, ta);
+ if (!rx_reor_tbl_ptr) {
+ if (pkt_type != PKT_TYPE_BAR)
+ mwifiex_11n_dispatch_pkt(priv, payload);
+ return 0;
+ }
+ start_win = rx_reor_tbl_ptr->start_win;
+ win_size = rx_reor_tbl_ptr->win_size;
+ end_win = ((start_win + win_size) - 1) & (MAX_TID_VALUE - 1);
+ del_timer(&rx_reor_tbl_ptr->timer_context.timer);
+ mod_timer(&rx_reor_tbl_ptr->timer_context.timer, jiffies
+ + (MIN_FLUSH_TIMER_MS * win_size * HZ) / 1000);
+
+ /*
+ * If seq_num is less then starting win then ignore and drop the
+ * packet
+ */
+ if ((start_win + TWOPOW11) > (MAX_TID_VALUE - 1)) {/* Wrap */
+ if (seq_num >= ((start_win + (TWOPOW11)) & (MAX_TID_VALUE - 1))
+ && (seq_num < start_win))
+ return -1;
+ } else if ((seq_num < start_win)
+ || (seq_num > (start_win + (TWOPOW11)))) {
+ return -1;
+ }
+
+ /*
+ * 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 < (TWOPOW11 - (MAX_TID_VALUE - 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;
+ ret = mwifiex_11n_dispatch_pkt_until_start_win(priv,
+ rx_reor_tbl_ptr, start_win);
+
+ if (ret)
+ return ret;
+ }
+
+ 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 (rx_reor_tbl_ptr->rx_reorder_ptr[pkt_index])
+ return -1;
+
+ rx_reor_tbl_ptr->rx_reorder_ptr[pkt_index] = payload;
+ }
+
+ /*
+ * Dispatch all packets sequentially from start_win until a
+ * hole is found and adjust the start_win appropriately
+ */
+ ret = mwifiex_11n_scan_and_dispatch(priv, rx_reor_tbl_ptr);
+
+ 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_11n_delete_ba_stream_tbl(struct mwifiex_private *priv, int tid,
+ u8 *peer_mac, u8 type, int initiator)
+{
+ struct mwifiex_rx_reorder_tbl *rx_reor_tbl_ptr;
+ struct mwifiex_tx_ba_stream_tbl *ptx_tbl;
+ 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) {
+ rx_reor_tbl_ptr = mwifiex_11n_get_rx_reorder_tbl(priv, tid,
+ peer_mac);
+ if (!rx_reor_tbl_ptr) {
+ dev_dbg(priv->adapter->dev,
+ "event: TID, TA not found in table\n");
+ return;
+ }
+ mwifiex_11n_delete_rx_reorder_tbl_entry(priv, rx_reor_tbl_ptr);
+ } else {
+ ptx_tbl = mwifiex_11n_get_tx_ba_stream_tbl(priv, tid, peer_mac);
+ if (!ptx_tbl) {
+ dev_dbg(priv->adapter->dev,
+ "event: TID, RA not found in table\n");
+ return;
+ }
+
+ 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 =
+ (struct host_cmd_ds_11n_addba_rsp *)
+ &resp->params.add_ba_rsp;
+ int tid, win_size;
+ struct mwifiex_rx_reorder_tbl *rx_reor_tbl_ptr = NULL;
+ 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) {
+ win_size = (block_ack_param_set &
+ IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK)
+ >> BLOCKACKPARAM_WINSIZE_POS;
+
+ 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);
+ } else {
+ dev_err(priv->adapter->dev, "ADDBA RSP: failed %pM tid=%d)\n",
+ add_ba_rsp->peer_mac_addr, tid);
+
+ rx_reor_tbl_ptr = mwifiex_11n_get_rx_reorder_tbl(priv,
+ tid, add_ba_rsp->peer_mac_addr);
+ if (rx_reor_tbl_ptr)
+ mwifiex_11n_delete_rx_reorder_tbl_entry(priv,
+ rx_reor_tbl_ptr);
+ }
+
+ 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_prepare_cmd(priv, HostCmd_CMD_11N_DELBA, 0, 0, NULL, &delba);
+
+ return;
+}
+
+/*
+ * 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_11n_delete_rx_reorder_tbl_entry(priv, del_tbl_ptr);
+ spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
+ }
+ spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
+
+ INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
+ memset(priv->rx_seq, 0, sizeof(priv->rx_seq));
+}