2009-02-10 21:25:46 +01:00
|
|
|
/*
|
|
|
|
* HT handling
|
|
|
|
*
|
|
|
|
* Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
|
|
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|
* Copyright 2002-2005, Instant802 Networks, Inc.
|
|
|
|
* Copyright 2005-2006, Devicescape Software, Inc.
|
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|
|
* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
|
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|
|
* Copyright 2007, Michael Wu <flamingice@sourmilk.net>
|
2010-06-10 10:21:46 +02:00
|
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|
* Copyright 2007-2010, Intel Corporation
|
2009-02-10 21:25:46 +01:00
|
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*
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|
* This program is free software; you can redistribute it and/or modify
|
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|
* it under the terms of the GNU General Public License version 2 as
|
|
|
|
* published by the Free Software Foundation.
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|
|
*/
|
|
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|
2010-06-10 10:21:50 +02:00
|
|
|
/**
|
|
|
|
* DOC: RX A-MPDU aggregation
|
|
|
|
*
|
|
|
|
* Aggregation on the RX side requires only implementing the
|
|
|
|
* @ampdu_action callback that is invoked to start/stop any
|
|
|
|
* block-ack sessions for RX aggregation.
|
|
|
|
*
|
|
|
|
* When RX aggregation is started by the peer, the driver is
|
|
|
|
* notified via @ampdu_action function, with the
|
|
|
|
* %IEEE80211_AMPDU_RX_START action, and may reject the request
|
|
|
|
* in which case a negative response is sent to the peer, if it
|
|
|
|
* accepts it a positive response is sent.
|
|
|
|
*
|
|
|
|
* While the session is active, the device/driver are required
|
|
|
|
* to de-aggregate frames and pass them up one by one to mac80211,
|
|
|
|
* which will handle the reorder buffer.
|
|
|
|
*
|
|
|
|
* When the aggregation session is stopped again by the peer or
|
|
|
|
* ourselves, the driver's @ampdu_action function will be called
|
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|
|
* with the action %IEEE80211_AMPDU_RX_STOP. In this case, the
|
|
|
|
* call must not fail.
|
|
|
|
*/
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|
2009-02-10 21:25:46 +01:00
|
|
|
#include <linux/ieee80211.h>
|
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 09:04:11 +01:00
|
|
|
#include <linux/slab.h>
|
2011-07-15 17:47:34 +02:00
|
|
|
#include <linux/export.h>
|
2009-02-10 21:25:46 +01:00
|
|
|
#include <net/mac80211.h>
|
|
|
|
#include "ieee80211_i.h"
|
2009-04-23 18:52:52 +02:00
|
|
|
#include "driver-ops.h"
|
2009-02-10 21:25:46 +01:00
|
|
|
|
2010-06-10 10:21:38 +02:00
|
|
|
static void ieee80211_free_tid_rx(struct rcu_head *h)
|
|
|
|
{
|
|
|
|
struct tid_ampdu_rx *tid_rx =
|
|
|
|
container_of(h, struct tid_ampdu_rx, rcu_head);
|
|
|
|
int i;
|
|
|
|
|
2012-03-19 16:00:26 +01:00
|
|
|
del_timer_sync(&tid_rx->reorder_timer);
|
|
|
|
|
2010-06-10 10:21:38 +02:00
|
|
|
for (i = 0; i < tid_rx->buf_size; i++)
|
|
|
|
dev_kfree_skb(tid_rx->reorder_buf[i]);
|
|
|
|
kfree(tid_rx->reorder_buf);
|
|
|
|
kfree(tid_rx->reorder_time);
|
|
|
|
kfree(tid_rx);
|
|
|
|
}
|
|
|
|
|
2010-06-10 10:21:44 +02:00
|
|
|
void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
|
2010-10-05 19:37:40 +02:00
|
|
|
u16 initiator, u16 reason, bool tx)
|
2009-02-10 21:25:46 +01:00
|
|
|
{
|
2009-02-10 21:25:53 +01:00
|
|
|
struct ieee80211_local *local = sta->local;
|
2010-04-06 11:18:47 +02:00
|
|
|
struct tid_ampdu_rx *tid_rx;
|
2009-02-10 21:25:46 +01:00
|
|
|
|
2010-06-10 10:21:46 +02:00
|
|
|
lockdep_assert_held(&sta->ampdu_mlme.mtx);
|
2010-04-06 11:18:47 +02:00
|
|
|
|
2011-05-13 14:15:49 +02:00
|
|
|
tid_rx = rcu_dereference_protected(sta->ampdu_mlme.tid_rx[tid],
|
|
|
|
lockdep_is_held(&sta->ampdu_mlme.mtx));
|
2010-06-10 10:21:38 +02:00
|
|
|
|
2010-06-10 10:21:44 +02:00
|
|
|
if (!tid_rx)
|
2009-02-10 21:25:46 +01:00
|
|
|
return;
|
2009-02-10 21:25:53 +01:00
|
|
|
|
2011-08-01 18:19:00 +02:00
|
|
|
RCU_INIT_POINTER(sta->ampdu_mlme.tid_rx[tid], NULL);
|
2009-02-10 21:25:46 +01:00
|
|
|
|
2012-05-15 23:20:31 +02:00
|
|
|
ht_vdbg("Rx BA session stop requested for %pM tid %u %s reason: %d\n",
|
|
|
|
sta->sta.addr, tid,
|
|
|
|
initiator == WLAN_BACK_RECIPIENT ? "recipient" : "inititator",
|
|
|
|
(int)reason);
|
2009-02-10 21:25:46 +01:00
|
|
|
|
2009-11-25 20:30:31 +01:00
|
|
|
if (drv_ampdu_action(local, sta->sdata, IEEE80211_AMPDU_RX_STOP,
|
2011-01-18 13:51:05 +01:00
|
|
|
&sta->sta, tid, NULL, 0))
|
2012-05-15 23:20:30 +02:00
|
|
|
pr_debug("HW problem - can not stop rx aggregation for tid %d\n",
|
|
|
|
tid);
|
2009-02-10 21:25:46 +01:00
|
|
|
|
|
|
|
/* check if this is a self generated aggregation halt */
|
2010-10-05 19:37:40 +02:00
|
|
|
if (initiator == WLAN_BACK_RECIPIENT && tx)
|
2009-02-10 21:25:53 +01:00
|
|
|
ieee80211_send_delba(sta->sdata, sta->sta.addr,
|
2011-11-23 03:50:29 +01:00
|
|
|
tid, WLAN_BACK_RECIPIENT, reason);
|
2009-02-10 21:25:46 +01:00
|
|
|
|
2010-06-10 10:21:44 +02:00
|
|
|
del_timer_sync(&tid_rx->session_timer);
|
2010-06-10 10:21:38 +02:00
|
|
|
|
|
|
|
call_rcu(&tid_rx->rcu_head, ieee80211_free_tid_rx);
|
2009-02-10 21:25:46 +01:00
|
|
|
}
|
|
|
|
|
2010-04-19 11:00:24 +02:00
|
|
|
void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
|
2010-10-05 19:37:40 +02:00
|
|
|
u16 initiator, u16 reason, bool tx)
|
2010-04-19 11:00:24 +02:00
|
|
|
{
|
2010-06-10 10:21:46 +02:00
|
|
|
mutex_lock(&sta->ampdu_mlme.mtx);
|
2010-10-05 19:37:40 +02:00
|
|
|
___ieee80211_stop_rx_ba_session(sta, tid, initiator, reason, tx);
|
2010-06-10 10:21:46 +02:00
|
|
|
mutex_unlock(&sta->ampdu_mlme.mtx);
|
2010-04-19 11:00:24 +02:00
|
|
|
}
|
|
|
|
|
2011-05-22 15:10:21 +02:00
|
|
|
void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap,
|
|
|
|
const u8 *addr)
|
|
|
|
{
|
|
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
2011-07-19 12:14:42 +02:00
|
|
|
struct sta_info *sta;
|
2011-05-22 15:10:21 +02:00
|
|
|
int i;
|
|
|
|
|
2011-07-19 12:14:42 +02:00
|
|
|
rcu_read_lock();
|
2011-11-23 15:09:49 +01:00
|
|
|
sta = sta_info_get_bss(sdata, addr);
|
2011-07-19 12:14:42 +02:00
|
|
|
if (!sta) {
|
|
|
|
rcu_read_unlock();
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2011-05-22 15:10:21 +02:00
|
|
|
for (i = 0; i < STA_TID_NUM; i++)
|
|
|
|
if (ba_rx_bitmap & BIT(i))
|
|
|
|
set_bit(i, sta->ampdu_mlme.tid_rx_stop_requested);
|
|
|
|
|
|
|
|
ieee80211_queue_work(&sta->local->hw, &sta->ampdu_mlme.work);
|
2011-07-19 12:14:42 +02:00
|
|
|
rcu_read_unlock();
|
2011-05-22 15:10:21 +02:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(ieee80211_stop_rx_ba_session);
|
|
|
|
|
2009-02-10 21:25:46 +01:00
|
|
|
/*
|
|
|
|
* After accepting the AddBA Request we activated a timer,
|
|
|
|
* resetting it after each frame that arrives from the originator.
|
|
|
|
*/
|
|
|
|
static void sta_rx_agg_session_timer_expired(unsigned long data)
|
|
|
|
{
|
|
|
|
/* not an elegant detour, but there is no choice as the timer passes
|
|
|
|
* only one argument, and various sta_info are needed here, so init
|
|
|
|
* flow in sta_info_create gives the TID as data, while the timer_to_id
|
|
|
|
* array gives the sta through container_of */
|
|
|
|
u8 *ptid = (u8 *)data;
|
|
|
|
u8 *timer_to_id = ptid - *ptid;
|
|
|
|
struct sta_info *sta = container_of(timer_to_id, struct sta_info,
|
|
|
|
timer_to_tid[0]);
|
2012-03-18 22:58:06 +01:00
|
|
|
struct tid_ampdu_rx *tid_rx;
|
|
|
|
unsigned long timeout;
|
|
|
|
|
2012-05-30 15:32:24 +02:00
|
|
|
rcu_read_lock();
|
2012-03-18 22:58:06 +01:00
|
|
|
tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[*ptid]);
|
2012-05-30 15:32:24 +02:00
|
|
|
if (!tid_rx) {
|
|
|
|
rcu_read_unlock();
|
2012-03-18 22:58:06 +01:00
|
|
|
return;
|
2012-05-30 15:32:24 +02:00
|
|
|
}
|
2012-03-18 22:58:06 +01:00
|
|
|
|
|
|
|
timeout = tid_rx->last_rx + TU_TO_JIFFIES(tid_rx->timeout);
|
|
|
|
if (time_is_after_jiffies(timeout)) {
|
|
|
|
mod_timer(&tid_rx->session_timer, timeout);
|
2012-05-30 15:32:24 +02:00
|
|
|
rcu_read_unlock();
|
2012-03-18 22:58:06 +01:00
|
|
|
return;
|
|
|
|
}
|
2012-05-30 15:32:24 +02:00
|
|
|
rcu_read_unlock();
|
2009-02-10 21:25:46 +01:00
|
|
|
|
2012-05-15 23:20:31 +02:00
|
|
|
ht_vdbg("rx session timer expired on tid %d\n", (u16)*ptid);
|
|
|
|
|
2010-06-10 10:21:44 +02:00
|
|
|
set_bit(*ptid, sta->ampdu_mlme.tid_rx_timer_expired);
|
|
|
|
ieee80211_queue_work(&sta->local->hw, &sta->ampdu_mlme.work);
|
2009-02-10 21:25:46 +01:00
|
|
|
}
|
|
|
|
|
2010-08-05 01:36:41 +02:00
|
|
|
static void sta_rx_agg_reorder_timer_expired(unsigned long data)
|
|
|
|
{
|
|
|
|
u8 *ptid = (u8 *)data;
|
|
|
|
u8 *timer_to_id = ptid - *ptid;
|
|
|
|
struct sta_info *sta = container_of(timer_to_id, struct sta_info,
|
|
|
|
timer_to_tid[0]);
|
|
|
|
|
|
|
|
rcu_read_lock();
|
|
|
|
ieee80211_release_reorder_timeout(sta, *ptid);
|
|
|
|
rcu_read_unlock();
|
|
|
|
}
|
|
|
|
|
2009-02-10 21:25:46 +01:00
|
|
|
static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid,
|
|
|
|
u8 dialog_token, u16 status, u16 policy,
|
|
|
|
u16 buf_size, u16 timeout)
|
|
|
|
{
|
|
|
|
struct ieee80211_local *local = sdata->local;
|
|
|
|
struct sk_buff *skb;
|
|
|
|
struct ieee80211_mgmt *mgmt;
|
|
|
|
u16 capab;
|
|
|
|
|
|
|
|
skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
|
2011-08-29 23:17:31 +02:00
|
|
|
if (!skb)
|
2009-02-10 21:25:46 +01:00
|
|
|
return;
|
|
|
|
|
|
|
|
skb_reserve(skb, local->hw.extra_tx_headroom);
|
|
|
|
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
|
|
|
|
memset(mgmt, 0, 24);
|
|
|
|
memcpy(mgmt->da, da, ETH_ALEN);
|
2009-11-25 17:46:19 +01:00
|
|
|
memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
|
2009-02-10 21:25:47 +01:00
|
|
|
if (sdata->vif.type == NL80211_IFTYPE_AP ||
|
2011-10-26 23:47:29 +02:00
|
|
|
sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
|
|
|
|
sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
|
2009-11-25 17:46:19 +01:00
|
|
|
memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
|
2009-02-15 12:44:28 +01:00
|
|
|
else if (sdata->vif.type == NL80211_IFTYPE_STATION)
|
|
|
|
memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
|
2011-11-30 16:56:34 +01:00
|
|
|
else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
|
|
|
|
memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN);
|
2009-02-15 12:44:28 +01:00
|
|
|
|
2009-02-10 21:25:46 +01:00
|
|
|
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
|
|
|
|
IEEE80211_STYPE_ACTION);
|
|
|
|
|
|
|
|
skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
|
|
|
|
mgmt->u.action.category = WLAN_CATEGORY_BACK;
|
|
|
|
mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
|
|
|
|
mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
|
|
|
|
|
|
|
|
capab = (u16)(policy << 1); /* bit 1 aggregation policy */
|
|
|
|
capab |= (u16)(tid << 2); /* bit 5:2 TID number */
|
|
|
|
capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
|
|
|
|
|
|
|
|
mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
|
|
|
|
mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
|
|
|
|
mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
|
|
|
|
|
2009-11-18 18:42:05 +01:00
|
|
|
ieee80211_tx_skb(sdata, skb);
|
2009-02-10 21:25:46 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
void ieee80211_process_addba_request(struct ieee80211_local *local,
|
|
|
|
struct sta_info *sta,
|
|
|
|
struct ieee80211_mgmt *mgmt,
|
|
|
|
size_t len)
|
|
|
|
{
|
|
|
|
struct tid_ampdu_rx *tid_agg_rx;
|
|
|
|
u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
|
|
|
|
u8 dialog_token;
|
|
|
|
int ret = -EOPNOTSUPP;
|
|
|
|
|
|
|
|
/* extract session parameters from addba request frame */
|
|
|
|
dialog_token = mgmt->u.action.u.addba_req.dialog_token;
|
|
|
|
timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
|
|
|
|
start_seq_num =
|
|
|
|
le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
|
|
|
|
|
|
|
|
capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
|
|
|
|
ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
|
|
|
|
tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
|
|
|
|
buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
|
|
|
|
|
|
|
|
status = WLAN_STATUS_REQUEST_DECLINED;
|
|
|
|
|
2011-09-29 16:04:36 +02:00
|
|
|
if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) {
|
2012-05-15 23:20:31 +02:00
|
|
|
ht_vdbg("Suspend in progress - Denying ADDBA request\n");
|
2009-03-17 04:20:06 +01:00
|
|
|
goto end_no_lock;
|
|
|
|
}
|
|
|
|
|
2009-02-10 21:25:46 +01:00
|
|
|
/* sanity check for incoming parameters:
|
|
|
|
* check if configuration can support the BA policy
|
|
|
|
* and if buffer size does not exceeds max value */
|
|
|
|
/* XXX: check own ht delayed BA capability?? */
|
2009-11-30 01:55:45 +01:00
|
|
|
if (((ba_policy != 1) &&
|
|
|
|
(!(sta->sta.ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA))) ||
|
|
|
|
(buf_size > IEEE80211_MAX_AMPDU_BUF)) {
|
2009-02-10 21:25:46 +01:00
|
|
|
status = WLAN_STATUS_INVALID_QOS_PARAM;
|
|
|
|
#ifdef CONFIG_MAC80211_HT_DEBUG
|
2012-05-13 23:56:26 +02:00
|
|
|
net_dbg_ratelimited("AddBA Req with bad params from %pM on tid %u. policy %d, buffer size %d\n",
|
|
|
|
mgmt->sa, tid, ba_policy, buf_size);
|
2009-02-10 21:25:46 +01:00
|
|
|
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
|
|
|
goto end_no_lock;
|
|
|
|
}
|
|
|
|
/* determine default buffer size */
|
2011-01-12 14:18:11 +01:00
|
|
|
if (buf_size == 0)
|
|
|
|
buf_size = IEEE80211_MAX_AMPDU_BUF;
|
2009-02-10 21:25:46 +01:00
|
|
|
|
2011-01-12 14:26:30 +01:00
|
|
|
/* make sure the size doesn't exceed the maximum supported by the hw */
|
|
|
|
if (buf_size > local->hw.max_rx_aggregation_subframes)
|
|
|
|
buf_size = local->hw.max_rx_aggregation_subframes;
|
2009-02-10 21:25:46 +01:00
|
|
|
|
|
|
|
/* examine state machine */
|
2010-06-10 10:21:46 +02:00
|
|
|
mutex_lock(&sta->ampdu_mlme.mtx);
|
2009-02-10 21:25:46 +01:00
|
|
|
|
2010-06-10 10:21:38 +02:00
|
|
|
if (sta->ampdu_mlme.tid_rx[tid]) {
|
2009-02-10 21:25:46 +01:00
|
|
|
#ifdef CONFIG_MAC80211_HT_DEBUG
|
2012-05-13 23:56:26 +02:00
|
|
|
net_dbg_ratelimited("unexpected AddBA Req from %pM on tid %u\n",
|
|
|
|
mgmt->sa, tid);
|
2009-02-10 21:25:46 +01:00
|
|
|
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
2011-06-23 00:15:27 +02:00
|
|
|
|
|
|
|
/* delete existing Rx BA session on the same tid */
|
|
|
|
___ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
|
|
|
|
WLAN_STATUS_UNSPECIFIED_QOS,
|
|
|
|
false);
|
2009-02-10 21:25:46 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/* prepare A-MPDU MLME for Rx aggregation */
|
2010-11-29 11:09:16 +01:00
|
|
|
tid_agg_rx = kmalloc(sizeof(struct tid_ampdu_rx), GFP_KERNEL);
|
2011-08-29 23:17:31 +02:00
|
|
|
if (!tid_agg_rx)
|
2009-02-10 21:25:46 +01:00
|
|
|
goto end;
|
|
|
|
|
2010-08-05 01:36:41 +02:00
|
|
|
spin_lock_init(&tid_agg_rx->reorder_lock);
|
|
|
|
|
2010-06-10 10:21:38 +02:00
|
|
|
/* rx timer */
|
|
|
|
tid_agg_rx->session_timer.function = sta_rx_agg_session_timer_expired;
|
|
|
|
tid_agg_rx->session_timer.data = (unsigned long)&sta->timer_to_tid[tid];
|
2012-03-18 22:58:06 +01:00
|
|
|
init_timer_deferrable(&tid_agg_rx->session_timer);
|
2009-02-10 21:25:46 +01:00
|
|
|
|
2010-08-05 01:36:41 +02:00
|
|
|
/* rx reorder timer */
|
|
|
|
tid_agg_rx->reorder_timer.function = sta_rx_agg_reorder_timer_expired;
|
|
|
|
tid_agg_rx->reorder_timer.data = (unsigned long)&sta->timer_to_tid[tid];
|
|
|
|
init_timer(&tid_agg_rx->reorder_timer);
|
|
|
|
|
2009-02-10 21:25:46 +01:00
|
|
|
/* prepare reordering buffer */
|
|
|
|
tid_agg_rx->reorder_buf =
|
2010-11-29 11:09:16 +01:00
|
|
|
kcalloc(buf_size, sizeof(struct sk_buff *), GFP_KERNEL);
|
2009-05-05 19:35:14 +02:00
|
|
|
tid_agg_rx->reorder_time =
|
2010-11-29 11:09:16 +01:00
|
|
|
kcalloc(buf_size, sizeof(unsigned long), GFP_KERNEL);
|
2009-05-05 19:35:14 +02:00
|
|
|
if (!tid_agg_rx->reorder_buf || !tid_agg_rx->reorder_time) {
|
|
|
|
kfree(tid_agg_rx->reorder_buf);
|
|
|
|
kfree(tid_agg_rx->reorder_time);
|
2010-06-10 10:21:38 +02:00
|
|
|
kfree(tid_agg_rx);
|
2009-02-10 21:25:46 +01:00
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
2009-11-25 20:30:31 +01:00
|
|
|
ret = drv_ampdu_action(local, sta->sdata, IEEE80211_AMPDU_RX_START,
|
2011-01-18 13:51:05 +01:00
|
|
|
&sta->sta, tid, &start_seq_num, 0);
|
2012-05-15 23:20:31 +02:00
|
|
|
ht_vdbg("Rx A-MPDU request on tid %d result %d\n", tid, ret);
|
2009-02-10 21:25:46 +01:00
|
|
|
if (ret) {
|
|
|
|
kfree(tid_agg_rx->reorder_buf);
|
2010-06-10 10:21:38 +02:00
|
|
|
kfree(tid_agg_rx->reorder_time);
|
2009-02-10 21:25:46 +01:00
|
|
|
kfree(tid_agg_rx);
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
2010-06-10 10:21:38 +02:00
|
|
|
/* update data */
|
2009-02-10 21:25:46 +01:00
|
|
|
tid_agg_rx->dialog_token = dialog_token;
|
|
|
|
tid_agg_rx->ssn = start_seq_num;
|
|
|
|
tid_agg_rx->head_seq_num = start_seq_num;
|
|
|
|
tid_agg_rx->buf_size = buf_size;
|
|
|
|
tid_agg_rx->timeout = timeout;
|
|
|
|
tid_agg_rx->stored_mpdu_num = 0;
|
|
|
|
status = WLAN_STATUS_SUCCESS;
|
2010-06-10 10:21:38 +02:00
|
|
|
|
|
|
|
/* activate it for RX */
|
2012-01-12 05:41:32 +01:00
|
|
|
rcu_assign_pointer(sta->ampdu_mlme.tid_rx[tid], tid_agg_rx);
|
2010-06-10 10:21:45 +02:00
|
|
|
|
2012-03-18 22:58:06 +01:00
|
|
|
if (timeout) {
|
2010-06-10 10:21:45 +02:00
|
|
|
mod_timer(&tid_agg_rx->session_timer, TU_TO_EXP_TIME(timeout));
|
2012-03-18 22:58:06 +01:00
|
|
|
tid_agg_rx->last_rx = jiffies;
|
|
|
|
}
|
2010-06-10 10:21:45 +02:00
|
|
|
|
2009-02-10 21:25:46 +01:00
|
|
|
end:
|
2010-06-10 10:21:46 +02:00
|
|
|
mutex_unlock(&sta->ampdu_mlme.mtx);
|
2009-02-10 21:25:46 +01:00
|
|
|
|
|
|
|
end_no_lock:
|
|
|
|
ieee80211_send_addba_resp(sta->sdata, sta->sta.addr, tid,
|
|
|
|
dialog_token, status, 1, buf_size, timeout);
|
|
|
|
}
|