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ubuntu-linux-kernel/drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c

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/*
* 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(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;
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;
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_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);
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;
}
}
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