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linux/drivers/net/wireless/mwifiex/wmm.c
Stone Piao f03ba7e9a2 mwifiex: fix WPS eapol handshake failure 
After association, STA will go through eapol handshake with WPS
enabled AP. It's observed that WPS handshake fails with some 11n
AP. The reason for the failure is that the eapol packet is sent
via 11n frame aggregation.

The eapol packet should be sent directly without 11n aggregation.

This patch fixes the problem by adding WPS session control while
dequeuing Tx packets for transmission.

Cc: "3.4.y" <stable@vger.kernel.org>
Signed-off-by: Stone Piao <piaoyun@marvell.com>
Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-06-22 13:59:49 -04:00

1276 lines
34 KiB
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/*
* Marvell Wireless LAN device driver: WMM
*
* 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"
/* Maximum value FW can accept for driver delay in packet transmission */
#define DRV_PKT_DELAY_TO_FW_MAX 512
#define WMM_QUEUED_PACKET_LOWER_LIMIT 180
#define WMM_QUEUED_PACKET_UPPER_LIMIT 200
/* Offset for TOS field in the IP header */
#define IPTOS_OFFSET 5
/* WMM information IE */
static const u8 wmm_info_ie[] = { WLAN_EID_VENDOR_SPECIFIC, 0x07,
0x00, 0x50, 0xf2, 0x02,
0x00, 0x01, 0x00
};
static const u8 wmm_aci_to_qidx_map[] = { WMM_AC_BE,
WMM_AC_BK,
WMM_AC_VI,
WMM_AC_VO
};
static u8 tos_to_tid[] = {
/* TID DSCP_P2 DSCP_P1 DSCP_P0 WMM_AC */
0x01, /* 0 1 0 AC_BK */
0x02, /* 0 0 0 AC_BK */
0x00, /* 0 0 1 AC_BE */
0x03, /* 0 1 1 AC_BE */
0x04, /* 1 0 0 AC_VI */
0x05, /* 1 0 1 AC_VI */
0x06, /* 1 1 0 AC_VO */
0x07 /* 1 1 1 AC_VO */
};
/*
* This table inverses the tos_to_tid operation to get a priority
* which is in sequential order, and can be compared.
* Use this to compare the priority of two different TIDs.
*/
static u8 tos_to_tid_inv[] = {
0x02, /* from tos_to_tid[2] = 0 */
0x00, /* from tos_to_tid[0] = 1 */
0x01, /* from tos_to_tid[1] = 2 */
0x03,
0x04,
0x05,
0x06,
0x07};
static u8 ac_to_tid[4][2] = { {1, 2}, {0, 3}, {4, 5}, {6, 7} };
/*
* This function debug prints the priority parameters for a WMM AC.
*/
static void
mwifiex_wmm_ac_debug_print(const struct ieee_types_wmm_ac_parameters *ac_param)
{
const char *ac_str[] = { "BK", "BE", "VI", "VO" };
pr_debug("info: WMM AC_%s: ACI=%d, ACM=%d, Aifsn=%d, "
"EcwMin=%d, EcwMax=%d, TxopLimit=%d\n",
ac_str[wmm_aci_to_qidx_map[(ac_param->aci_aifsn_bitmap
& MWIFIEX_ACI) >> 5]],
(ac_param->aci_aifsn_bitmap & MWIFIEX_ACI) >> 5,
(ac_param->aci_aifsn_bitmap & MWIFIEX_ACM) >> 4,
ac_param->aci_aifsn_bitmap & MWIFIEX_AIFSN,
ac_param->ecw_bitmap & MWIFIEX_ECW_MIN,
(ac_param->ecw_bitmap & MWIFIEX_ECW_MAX) >> 4,
le16_to_cpu(ac_param->tx_op_limit));
}
/*
* This function allocates a route address list.
*
* The function also initializes the list with the provided RA.
*/
static struct mwifiex_ra_list_tbl *
mwifiex_wmm_allocate_ralist_node(struct mwifiex_adapter *adapter, u8 *ra)
{
struct mwifiex_ra_list_tbl *ra_list;
ra_list = kzalloc(sizeof(struct mwifiex_ra_list_tbl), GFP_ATOMIC);
if (!ra_list) {
dev_err(adapter->dev, "%s: failed to alloc ra_list\n",
__func__);
return NULL;
}
INIT_LIST_HEAD(&ra_list->list);
skb_queue_head_init(&ra_list->skb_head);
memcpy(ra_list->ra, ra, ETH_ALEN);
ra_list->total_pkts_size = 0;
dev_dbg(adapter->dev, "info: allocated ra_list %p\n", ra_list);
return ra_list;
}
/*
* This function allocates and adds a RA list for all TIDs
* with the given RA.
*/
void
mwifiex_ralist_add(struct mwifiex_private *priv, u8 *ra)
{
int i;
struct mwifiex_ra_list_tbl *ra_list;
struct mwifiex_adapter *adapter = priv->adapter;
for (i = 0; i < MAX_NUM_TID; ++i) {
ra_list = mwifiex_wmm_allocate_ralist_node(adapter, ra);
dev_dbg(adapter->dev, "info: created ra_list %p\n", ra_list);
if (!ra_list)
break;
if (!mwifiex_queuing_ra_based(priv))
ra_list->is_11n_enabled = IS_11N_ENABLED(priv);
else
ra_list->is_11n_enabled = false;
dev_dbg(adapter->dev, "data: ralist %p: is_11n_enabled=%d\n",
ra_list, ra_list->is_11n_enabled);
list_add_tail(&ra_list->list,
&priv->wmm.tid_tbl_ptr[i].ra_list);
if (!priv->wmm.tid_tbl_ptr[i].ra_list_curr)
priv->wmm.tid_tbl_ptr[i].ra_list_curr = ra_list;
}
}
/*
* This function sets the WMM queue priorities to their default values.
*/
static void mwifiex_wmm_default_queue_priorities(struct mwifiex_private *priv)
{
/* Default queue priorities: VO->VI->BE->BK */
priv->wmm.queue_priority[0] = WMM_AC_VO;
priv->wmm.queue_priority[1] = WMM_AC_VI;
priv->wmm.queue_priority[2] = WMM_AC_BE;
priv->wmm.queue_priority[3] = WMM_AC_BK;
}
/*
* This function map ACs to TIDs.
*/
static void
mwifiex_wmm_queue_priorities_tid(struct mwifiex_wmm_desc *wmm)
{
u8 *queue_priority = wmm->queue_priority;
int i;
for (i = 0; i < 4; ++i) {
tos_to_tid[7 - (i * 2)] = ac_to_tid[queue_priority[i]][1];
tos_to_tid[6 - (i * 2)] = ac_to_tid[queue_priority[i]][0];
}
for (i = 0; i < MAX_NUM_TID; ++i)
tos_to_tid_inv[tos_to_tid[i]] = (u8)i;
atomic_set(&wmm->highest_queued_prio, HIGH_PRIO_TID);
}
/*
* This function initializes WMM priority queues.
*/
void
mwifiex_wmm_setup_queue_priorities(struct mwifiex_private *priv,
struct ieee_types_wmm_parameter *wmm_ie)
{
u16 cw_min, avg_back_off, tmp[4];
u32 i, j, num_ac;
u8 ac_idx;
if (!wmm_ie || !priv->wmm_enabled) {
/* WMM is not enabled, just set the defaults and return */
mwifiex_wmm_default_queue_priorities(priv);
return;
}
dev_dbg(priv->adapter->dev, "info: WMM Parameter IE: version=%d, "
"qos_info Parameter Set Count=%d, Reserved=%#x\n",
wmm_ie->vend_hdr.version, wmm_ie->qos_info_bitmap &
IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK,
wmm_ie->reserved);
for (num_ac = 0; num_ac < ARRAY_SIZE(wmm_ie->ac_params); num_ac++) {
u8 ecw = wmm_ie->ac_params[num_ac].ecw_bitmap;
u8 aci_aifsn = wmm_ie->ac_params[num_ac].aci_aifsn_bitmap;
cw_min = (1 << (ecw & MWIFIEX_ECW_MIN)) - 1;
avg_back_off = (cw_min >> 1) + (aci_aifsn & MWIFIEX_AIFSN);
ac_idx = wmm_aci_to_qidx_map[(aci_aifsn & MWIFIEX_ACI) >> 5];
priv->wmm.queue_priority[ac_idx] = ac_idx;
tmp[ac_idx] = avg_back_off;
dev_dbg(priv->adapter->dev,
"info: WMM: CWmax=%d CWmin=%d Avg Back-off=%d\n",
(1 << ((ecw & MWIFIEX_ECW_MAX) >> 4)) - 1,
cw_min, avg_back_off);
mwifiex_wmm_ac_debug_print(&wmm_ie->ac_params[num_ac]);
}
/* Bubble sort */
for (i = 0; i < num_ac; i++) {
for (j = 1; j < num_ac - i; j++) {
if (tmp[j - 1] > tmp[j]) {
swap(tmp[j - 1], tmp[j]);
swap(priv->wmm.queue_priority[j - 1],
priv->wmm.queue_priority[j]);
} else if (tmp[j - 1] == tmp[j]) {
if (priv->wmm.queue_priority[j - 1]
< priv->wmm.queue_priority[j])
swap(priv->wmm.queue_priority[j - 1],
priv->wmm.queue_priority[j]);
}
}
}
mwifiex_wmm_queue_priorities_tid(&priv->wmm);
}
/*
* This function evaluates whether or not an AC is to be downgraded.
*
* In case the AC is not enabled, the highest AC is returned that is
* enabled and does not require admission control.
*/
static enum mwifiex_wmm_ac_e
mwifiex_wmm_eval_downgrade_ac(struct mwifiex_private *priv,
enum mwifiex_wmm_ac_e eval_ac)
{
int down_ac;
enum mwifiex_wmm_ac_e ret_ac;
struct mwifiex_wmm_ac_status *ac_status;
ac_status = &priv->wmm.ac_status[eval_ac];
if (!ac_status->disabled)
/* Okay to use this AC, its enabled */
return eval_ac;
/* Setup a default return value of the lowest priority */
ret_ac = WMM_AC_BK;
/*
* Find the highest AC that is enabled and does not require
* admission control. The spec disallows downgrading to an AC,
* which is enabled due to a completed admission control.
* Unadmitted traffic is not to be sent on an AC with admitted
* traffic.
*/
for (down_ac = WMM_AC_BK; down_ac < eval_ac; down_ac++) {
ac_status = &priv->wmm.ac_status[down_ac];
if (!ac_status->disabled && !ac_status->flow_required)
/* AC is enabled and does not require admission
control */
ret_ac = (enum mwifiex_wmm_ac_e) down_ac;
}
return ret_ac;
}
/*
* This function downgrades WMM priority queue.
*/
void
mwifiex_wmm_setup_ac_downgrade(struct mwifiex_private *priv)
{
int ac_val;
dev_dbg(priv->adapter->dev, "info: WMM: AC Priorities:"
"BK(0), BE(1), VI(2), VO(3)\n");
if (!priv->wmm_enabled) {
/* WMM is not enabled, default priorities */
for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++)
priv->wmm.ac_down_graded_vals[ac_val] =
(enum mwifiex_wmm_ac_e) ac_val;
} else {
for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) {
priv->wmm.ac_down_graded_vals[ac_val]
= mwifiex_wmm_eval_downgrade_ac(priv,
(enum mwifiex_wmm_ac_e) ac_val);
dev_dbg(priv->adapter->dev,
"info: WMM: AC PRIO %d maps to %d\n",
ac_val, priv->wmm.ac_down_graded_vals[ac_val]);
}
}
}
/*
* This function converts the IP TOS field to an WMM AC
* Queue assignment.
*/
static enum mwifiex_wmm_ac_e
mwifiex_wmm_convert_tos_to_ac(struct mwifiex_adapter *adapter, u32 tos)
{
/* Map of TOS UP values to WMM AC */
const enum mwifiex_wmm_ac_e tos_to_ac[] = { WMM_AC_BE,
WMM_AC_BK,
WMM_AC_BK,
WMM_AC_BE,
WMM_AC_VI,
WMM_AC_VI,
WMM_AC_VO,
WMM_AC_VO
};
if (tos >= ARRAY_SIZE(tos_to_ac))
return WMM_AC_BE;
return tos_to_ac[tos];
}
/*
* This function evaluates a given TID and downgrades it to a lower
* TID if the WMM Parameter IE received from the AP indicates that the
* AP is disabled (due to call admission control (ACM bit). Mapping
* of TID to AC is taken care of internally.
*/
static u8
mwifiex_wmm_downgrade_tid(struct mwifiex_private *priv, u32 tid)
{
enum mwifiex_wmm_ac_e ac, ac_down;
u8 new_tid;
ac = mwifiex_wmm_convert_tos_to_ac(priv->adapter, tid);
ac_down = priv->wmm.ac_down_graded_vals[ac];
/* Send the index to tid array, picking from the array will be
* taken care by dequeuing function
*/
new_tid = ac_to_tid[ac_down][tid % 2];
return new_tid;
}
/*
* This function initializes the WMM state information and the
* WMM data path queues.
*/
void
mwifiex_wmm_init(struct mwifiex_adapter *adapter)
{
int i, j;
struct mwifiex_private *priv;
for (j = 0; j < adapter->priv_num; ++j) {
priv = adapter->priv[j];
if (!priv)
continue;
for (i = 0; i < MAX_NUM_TID; ++i) {
priv->aggr_prio_tbl[i].amsdu = tos_to_tid_inv[i];
priv->aggr_prio_tbl[i].ampdu_ap = tos_to_tid_inv[i];
priv->aggr_prio_tbl[i].ampdu_user = tos_to_tid_inv[i];
priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
}
priv->aggr_prio_tbl[6].amsdu
= priv->aggr_prio_tbl[6].ampdu_ap
= priv->aggr_prio_tbl[6].ampdu_user
= BA_STREAM_NOT_ALLOWED;
priv->aggr_prio_tbl[7].amsdu = priv->aggr_prio_tbl[7].ampdu_ap
= priv->aggr_prio_tbl[7].ampdu_user
= BA_STREAM_NOT_ALLOWED;
priv->add_ba_param.timeout = MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT;
priv->add_ba_param.tx_win_size = MWIFIEX_AMPDU_DEF_TXWINSIZE;
priv->add_ba_param.rx_win_size = MWIFIEX_AMPDU_DEF_RXWINSIZE;
mwifiex_reset_11n_rx_seq_num(priv);
atomic_set(&priv->wmm.tx_pkts_queued, 0);
atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
}
}
/*
* This function checks if WMM Tx queue is empty.
*/
int
mwifiex_wmm_lists_empty(struct mwifiex_adapter *adapter)
{
int i;
struct mwifiex_private *priv;
for (i = 0; i < adapter->priv_num; ++i) {
priv = adapter->priv[i];
if (priv && atomic_read(&priv->wmm.tx_pkts_queued))
return false;
}
return true;
}
/*
* This function deletes all packets in an RA list node.
*
* The packet sent completion callback handler are called with
* status failure, after they are dequeued to ensure proper
* cleanup. The RA list node itself is freed at the end.
*/
static void
mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private *priv,
struct mwifiex_ra_list_tbl *ra_list)
{
struct mwifiex_adapter *adapter = priv->adapter;
struct sk_buff *skb, *tmp;
skb_queue_walk_safe(&ra_list->skb_head, skb, tmp)
mwifiex_write_data_complete(adapter, skb, -1);
}
/*
* This function deletes all packets in an RA list.
*
* Each nodes in the RA list are freed individually first, and then
* the RA list itself is freed.
*/
static void
mwifiex_wmm_del_pkts_in_ralist(struct mwifiex_private *priv,
struct list_head *ra_list_head)
{
struct mwifiex_ra_list_tbl *ra_list;
list_for_each_entry(ra_list, ra_list_head, list)
mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list);
}
/*
* This function deletes all packets in all RA lists.
*/
static void mwifiex_wmm_cleanup_queues(struct mwifiex_private *priv)
{
int i;
for (i = 0; i < MAX_NUM_TID; i++)
mwifiex_wmm_del_pkts_in_ralist(priv, &priv->wmm.tid_tbl_ptr[i].
ra_list);
atomic_set(&priv->wmm.tx_pkts_queued, 0);
atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
}
/*
* This function deletes all route addresses from all RA lists.
*/
static void mwifiex_wmm_delete_all_ralist(struct mwifiex_private *priv)
{
struct mwifiex_ra_list_tbl *ra_list, *tmp_node;
int i;
for (i = 0; i < MAX_NUM_TID; ++i) {
dev_dbg(priv->adapter->dev,
"info: ra_list: freeing buf for tid %d\n", i);
list_for_each_entry_safe(ra_list, tmp_node,
&priv->wmm.tid_tbl_ptr[i].ra_list,
list) {
list_del(&ra_list->list);
kfree(ra_list);
}
INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[i].ra_list);
priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
}
}
/*
* This function cleans up the Tx and Rx queues.
*
* Cleanup includes -
* - All packets in RA lists
* - All entries in Rx reorder table
* - All entries in Tx BA stream table
* - MPA buffer (if required)
* - All RA lists
*/
void
mwifiex_clean_txrx(struct mwifiex_private *priv)
{
unsigned long flags;
mwifiex_11n_cleanup_reorder_tbl(priv);
spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
mwifiex_wmm_cleanup_queues(priv);
mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
if (priv->adapter->if_ops.cleanup_mpa_buf)
priv->adapter->if_ops.cleanup_mpa_buf(priv->adapter);
mwifiex_wmm_delete_all_ralist(priv);
memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid));
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
}
/*
* This function retrieves a particular RA list node, matching with the
* given TID and RA address.
*/
static struct mwifiex_ra_list_tbl *
mwifiex_wmm_get_ralist_node(struct mwifiex_private *priv, u8 tid,
u8 *ra_addr)
{
struct mwifiex_ra_list_tbl *ra_list;
list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[tid].ra_list,
list) {
if (!memcmp(ra_list->ra, ra_addr, ETH_ALEN))
return ra_list;
}
return NULL;
}
/*
* This function retrieves an RA list node for a given TID and
* RA address pair.
*
* If no such node is found, a new node is added first and then
* retrieved.
*/
static struct mwifiex_ra_list_tbl *
mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid, u8 *ra_addr)
{
struct mwifiex_ra_list_tbl *ra_list;
ra_list = mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
if (ra_list)
return ra_list;
mwifiex_ralist_add(priv, ra_addr);
return mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
}
/*
* This function checks if a particular RA list node exists in a given TID
* table index.
*/
int
mwifiex_is_ralist_valid(struct mwifiex_private *priv,
struct mwifiex_ra_list_tbl *ra_list, int ptr_index)
{
struct mwifiex_ra_list_tbl *rlist;
list_for_each_entry(rlist, &priv->wmm.tid_tbl_ptr[ptr_index].ra_list,
list) {
if (rlist == ra_list)
return true;
}
return false;
}
/*
* This function adds a packet to WMM queue.
*
* In disconnected state the packet is immediately dropped and the
* packet send completion callback is called with status failure.
*
* Otherwise, the correct RA list node is located and the packet
* is queued at the list tail.
*/
void
mwifiex_wmm_add_buf_txqueue(struct mwifiex_private *priv,
struct sk_buff *skb)
{
struct mwifiex_adapter *adapter = priv->adapter;
u32 tid;
struct mwifiex_ra_list_tbl *ra_list;
u8 ra[ETH_ALEN], tid_down;
unsigned long flags;
if (!priv->media_connected) {
dev_dbg(adapter->dev, "data: drop packet in disconnect\n");
mwifiex_write_data_complete(adapter, skb, -1);
return;
}
tid = skb->priority;
spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
/* In case of infra as we have already created the list during
association we just don't have to call get_queue_raptr, we will
have only 1 raptr for a tid in case of infra */
if (!mwifiex_queuing_ra_based(priv)) {
if (!list_empty(&priv->wmm.tid_tbl_ptr[tid_down].ra_list))
ra_list = list_first_entry(
&priv->wmm.tid_tbl_ptr[tid_down].ra_list,
struct mwifiex_ra_list_tbl, list);
else
ra_list = NULL;
} else {
memcpy(ra, skb->data, ETH_ALEN);
if (ra[0] & 0x01)
memset(ra, 0xff, ETH_ALEN);
ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down, ra);
}
if (!ra_list) {
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
mwifiex_write_data_complete(adapter, skb, -1);
return;
}
skb_queue_tail(&ra_list->skb_head, skb);
ra_list->total_pkts_size += skb->len;
atomic_inc(&priv->wmm.tx_pkts_queued);
if (atomic_read(&priv->wmm.highest_queued_prio) <
tos_to_tid_inv[tid_down])
atomic_set(&priv->wmm.highest_queued_prio,
tos_to_tid_inv[tid_down]);
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
}
/*
* This function processes the get WMM status command response from firmware.
*
* The response may contain multiple TLVs -
* - AC Queue status TLVs
* - Current WMM Parameter IE TLV
* - Admission Control action frame TLVs
*
* This function parses the TLVs and then calls further specific functions
* to process any changes in the queue prioritize or state.
*/
int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv,
const struct host_cmd_ds_command *resp)
{
u8 *curr = (u8 *) &resp->params.get_wmm_status;
uint16_t resp_len = le16_to_cpu(resp->size), tlv_len;
int valid = true;
struct mwifiex_ie_types_data *tlv_hdr;
struct mwifiex_ie_types_wmm_queue_status *tlv_wmm_qstatus;
struct ieee_types_wmm_parameter *wmm_param_ie = NULL;
struct mwifiex_wmm_ac_status *ac_status;
dev_dbg(priv->adapter->dev, "info: WMM: WMM_GET_STATUS cmdresp received: %d\n",
resp_len);
while ((resp_len >= sizeof(tlv_hdr->header)) && valid) {
tlv_hdr = (struct mwifiex_ie_types_data *) curr;
tlv_len = le16_to_cpu(tlv_hdr->header.len);
switch (le16_to_cpu(tlv_hdr->header.type)) {
case TLV_TYPE_WMMQSTATUS:
tlv_wmm_qstatus =
(struct mwifiex_ie_types_wmm_queue_status *)
tlv_hdr;
dev_dbg(priv->adapter->dev,
"info: CMD_RESP: WMM_GET_STATUS:"
" QSTATUS TLV: %d, %d, %d\n",
tlv_wmm_qstatus->queue_index,
tlv_wmm_qstatus->flow_required,
tlv_wmm_qstatus->disabled);
ac_status = &priv->wmm.ac_status[tlv_wmm_qstatus->
queue_index];
ac_status->disabled = tlv_wmm_qstatus->disabled;
ac_status->flow_required =
tlv_wmm_qstatus->flow_required;
ac_status->flow_created = tlv_wmm_qstatus->flow_created;
break;
case WLAN_EID_VENDOR_SPECIFIC:
/*
* Point the regular IEEE IE 2 bytes into the Marvell IE
* and setup the IEEE IE type and length byte fields
*/
wmm_param_ie =
(struct ieee_types_wmm_parameter *) (curr +
2);
wmm_param_ie->vend_hdr.len = (u8) tlv_len;
wmm_param_ie->vend_hdr.element_id =
WLAN_EID_VENDOR_SPECIFIC;
dev_dbg(priv->adapter->dev,
"info: CMD_RESP: WMM_GET_STATUS:"
" WMM Parameter Set Count: %d\n",
wmm_param_ie->qos_info_bitmap &
IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK);
memcpy((u8 *) &priv->curr_bss_params.bss_descriptor.
wmm_ie, wmm_param_ie,
wmm_param_ie->vend_hdr.len + 2);
break;
default:
valid = false;
break;
}
curr += (tlv_len + sizeof(tlv_hdr->header));
resp_len -= (tlv_len + sizeof(tlv_hdr->header));
}
mwifiex_wmm_setup_queue_priorities(priv, wmm_param_ie);
mwifiex_wmm_setup_ac_downgrade(priv);
return 0;
}
/*
* Callback handler from the command module to allow insertion of a WMM TLV.
*
* If the BSS we are associating to supports WMM, this function adds the
* required WMM Information IE to the association request command buffer in
* the form of a Marvell extended IEEE IE.
*/
u32
mwifiex_wmm_process_association_req(struct mwifiex_private *priv,
u8 **assoc_buf,
struct ieee_types_wmm_parameter *wmm_ie,
struct ieee80211_ht_cap *ht_cap)
{
struct mwifiex_ie_types_wmm_param_set *wmm_tlv;
u32 ret_len = 0;
/* Null checks */
if (!assoc_buf)
return 0;
if (!(*assoc_buf))
return 0;
if (!wmm_ie)
return 0;
dev_dbg(priv->adapter->dev,
"info: WMM: process assoc req: bss->wmm_ie=%#x\n",
wmm_ie->vend_hdr.element_id);
if ((priv->wmm_required ||
(ht_cap && (priv->adapter->config_bands & BAND_GN ||
priv->adapter->config_bands & BAND_AN))) &&
wmm_ie->vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC) {
wmm_tlv = (struct mwifiex_ie_types_wmm_param_set *) *assoc_buf;
wmm_tlv->header.type = cpu_to_le16((u16) wmm_info_ie[0]);
wmm_tlv->header.len = cpu_to_le16((u16) wmm_info_ie[1]);
memcpy(wmm_tlv->wmm_ie, &wmm_info_ie[2],
le16_to_cpu(wmm_tlv->header.len));
if (wmm_ie->qos_info_bitmap & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD)
memcpy((u8 *) (wmm_tlv->wmm_ie
+ le16_to_cpu(wmm_tlv->header.len)
- sizeof(priv->wmm_qosinfo)),
&priv->wmm_qosinfo, sizeof(priv->wmm_qosinfo));
ret_len = sizeof(wmm_tlv->header)
+ le16_to_cpu(wmm_tlv->header.len);
*assoc_buf += ret_len;
}
return ret_len;
}
/*
* This function computes the time delay in the driver queues for a
* given packet.
*
* When the packet is received at the OS/Driver interface, the current
* time is set in the packet structure. The difference between the present
* time and that received time is computed in this function and limited
* based on pre-compiled limits in the driver.
*/
u8
mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private *priv,
const struct sk_buff *skb)
{
u8 ret_val;
struct timeval out_tstamp, in_tstamp;
u32 queue_delay;
do_gettimeofday(&out_tstamp);
in_tstamp = ktime_to_timeval(skb->tstamp);
queue_delay = (out_tstamp.tv_sec - in_tstamp.tv_sec) * 1000;
queue_delay += (out_tstamp.tv_usec - in_tstamp.tv_usec) / 1000;
/*
* Queue delay is passed as a uint8 in units of 2ms (ms shifted
* by 1). Min value (other than 0) is therefore 2ms, max is 510ms.
*
* Pass max value if queue_delay is beyond the uint8 range
*/
ret_val = (u8) (min(queue_delay, priv->wmm.drv_pkt_delay_max) >> 1);
dev_dbg(priv->adapter->dev, "data: WMM: Pkt Delay: %d ms,"
" %d ms sent to FW\n", queue_delay, ret_val);
return ret_val;
}
/*
* This function retrieves the highest priority RA list table pointer.
*/
static struct mwifiex_ra_list_tbl *
mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter,
struct mwifiex_private **priv, int *tid)
{
struct mwifiex_private *priv_tmp;
struct mwifiex_ra_list_tbl *ptr, *head;
struct mwifiex_bss_prio_node *bssprio_node, *bssprio_head;
struct mwifiex_tid_tbl *tid_ptr;
atomic_t *hqp;
int is_list_empty;
unsigned long flags;
int i, j;
for (j = adapter->priv_num - 1; j >= 0; --j) {
spin_lock_irqsave(&adapter->bss_prio_tbl[j].bss_prio_lock,
flags);
is_list_empty = list_empty(&adapter->bss_prio_tbl[j]
.bss_prio_head);
spin_unlock_irqrestore(&adapter->bss_prio_tbl[j].bss_prio_lock,
flags);
if (is_list_empty)
continue;
if (adapter->bss_prio_tbl[j].bss_prio_cur ==
(struct mwifiex_bss_prio_node *)
&adapter->bss_prio_tbl[j].bss_prio_head) {
bssprio_node =
list_first_entry(&adapter->bss_prio_tbl[j]
.bss_prio_head,
struct mwifiex_bss_prio_node,
list);
bssprio_head = bssprio_node;
} else {
bssprio_node = adapter->bss_prio_tbl[j].bss_prio_cur;
bssprio_head = bssprio_node;
}
do {
priv_tmp = bssprio_node->priv;
hqp = &priv_tmp->wmm.highest_queued_prio;
for (i = atomic_read(hqp); i >= LOW_PRIO_TID; --i) {
tid_ptr = &(priv_tmp)->wmm.
tid_tbl_ptr[tos_to_tid[i]];
/* For non-STA ra_list_curr may be NULL */
if (!tid_ptr->ra_list_curr)
continue;
spin_lock_irqsave(&tid_ptr->tid_tbl_lock,
flags);
is_list_empty =
list_empty(&adapter->bss_prio_tbl[j]
.bss_prio_head);
spin_unlock_irqrestore(&tid_ptr->tid_tbl_lock,
flags);
if (is_list_empty)
continue;
/*
* Always choose the next ra we transmitted
* last time, this way we pick the ra's in
* round robin fashion.
*/
ptr = list_first_entry(
&tid_ptr->ra_list_curr->list,
struct mwifiex_ra_list_tbl,
list);
head = ptr;
if (ptr == (struct mwifiex_ra_list_tbl *)
&tid_ptr->ra_list) {
/* Get next ra */
ptr = list_first_entry(&ptr->list,
struct mwifiex_ra_list_tbl, list);
head = ptr;
}
do {
is_list_empty =
skb_queue_empty(&ptr->skb_head);
if (!is_list_empty)
goto found;
/* Get next ra */
ptr = list_first_entry(&ptr->list,
struct mwifiex_ra_list_tbl,
list);
if (ptr ==
(struct mwifiex_ra_list_tbl *)
&tid_ptr->ra_list)
ptr = list_first_entry(
&ptr->list,
struct mwifiex_ra_list_tbl,
list);
} while (ptr != head);
}
/* No packet at any TID for this priv. Mark as such
* to skip checking TIDs for this priv (until pkt is
* added).
*/
atomic_set(hqp, NO_PKT_PRIO_TID);
/* Get next bss priority node */
bssprio_node = list_first_entry(&bssprio_node->list,
struct mwifiex_bss_prio_node,
list);
if (bssprio_node ==
(struct mwifiex_bss_prio_node *)
&adapter->bss_prio_tbl[j].bss_prio_head)
/* Get next bss priority node */
bssprio_node = list_first_entry(
&bssprio_node->list,
struct mwifiex_bss_prio_node,
list);
} while (bssprio_node != bssprio_head);
}
return NULL;
found:
spin_lock_irqsave(&priv_tmp->wmm.ra_list_spinlock, flags);
if (atomic_read(hqp) > i)
atomic_set(hqp, i);
spin_unlock_irqrestore(&priv_tmp->wmm.ra_list_spinlock, flags);
*priv = priv_tmp;
*tid = tos_to_tid[i];
return ptr;
}
/*
* This function checks if 11n aggregation is possible.
*/
static int
mwifiex_is_11n_aggragation_possible(struct mwifiex_private *priv,
struct mwifiex_ra_list_tbl *ptr,
int max_buf_size)
{
int count = 0, total_size = 0;
struct sk_buff *skb, *tmp;
skb_queue_walk_safe(&ptr->skb_head, skb, tmp) {
total_size += skb->len;
if (total_size >= max_buf_size)
break;
if (++count >= MIN_NUM_AMSDU)
return true;
}
return false;
}
/*
* This function sends a single packet to firmware for transmission.
*/
static void
mwifiex_send_single_packet(struct mwifiex_private *priv,
struct mwifiex_ra_list_tbl *ptr, int ptr_index,
unsigned long ra_list_flags)
__releases(&priv->wmm.ra_list_spinlock)
{
struct sk_buff *skb, *skb_next;
struct mwifiex_tx_param tx_param;
struct mwifiex_adapter *adapter = priv->adapter;
struct mwifiex_txinfo *tx_info;
if (skb_queue_empty(&ptr->skb_head)) {
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
ra_list_flags);
dev_dbg(adapter->dev, "data: nothing to send\n");
return;
}
skb = skb_dequeue(&ptr->skb_head);
tx_info = MWIFIEX_SKB_TXCB(skb);
dev_dbg(adapter->dev, "data: dequeuing the packet %p %p\n", ptr, skb);
ptr->total_pkts_size -= skb->len;
if (!skb_queue_empty(&ptr->skb_head))
skb_next = skb_peek(&ptr->skb_head);
else
skb_next = NULL;
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
tx_param.next_pkt_len = ((skb_next) ? skb_next->len +
sizeof(struct txpd) : 0);
if (mwifiex_process_tx(priv, skb, &tx_param) == -EBUSY) {
/* Queue the packet back at the head */
spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
ra_list_flags);
mwifiex_write_data_complete(adapter, skb, -1);
return;
}
skb_queue_tail(&ptr->skb_head, skb);
ptr->total_pkts_size += skb->len;
tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
ra_list_flags);
} else {
spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
priv->wmm.packets_out[ptr_index]++;
priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
}
adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
list_first_entry(
&adapter->bss_prio_tbl[priv->bss_priority]
.bss_prio_cur->list,
struct mwifiex_bss_prio_node,
list);
atomic_dec(&priv->wmm.tx_pkts_queued);
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
ra_list_flags);
}
}
/*
* This function checks if the first packet in the given RA list
* is already processed or not.
*/
static int
mwifiex_is_ptr_processed(struct mwifiex_private *priv,
struct mwifiex_ra_list_tbl *ptr)
{
struct sk_buff *skb;
struct mwifiex_txinfo *tx_info;
if (skb_queue_empty(&ptr->skb_head))
return false;
skb = skb_peek(&ptr->skb_head);
tx_info = MWIFIEX_SKB_TXCB(skb);
if (tx_info->flags & MWIFIEX_BUF_FLAG_REQUEUED_PKT)
return true;
return false;
}
/*
* This function sends a single processed packet to firmware for
* transmission.
*/
static void
mwifiex_send_processed_packet(struct mwifiex_private *priv,
struct mwifiex_ra_list_tbl *ptr, int ptr_index,
unsigned long ra_list_flags)
__releases(&priv->wmm.ra_list_spinlock)
{
struct mwifiex_tx_param tx_param;
struct mwifiex_adapter *adapter = priv->adapter;
int ret = -1;
struct sk_buff *skb, *skb_next;
struct mwifiex_txinfo *tx_info;
if (skb_queue_empty(&ptr->skb_head)) {
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
ra_list_flags);
return;
}
skb = skb_dequeue(&ptr->skb_head);
if (!skb_queue_empty(&ptr->skb_head))
skb_next = skb_peek(&ptr->skb_head);
else
skb_next = NULL;
tx_info = MWIFIEX_SKB_TXCB(skb);
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
if (adapter->iface_type == MWIFIEX_USB) {
adapter->data_sent = true;
ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_USB_EP_DATA,
skb, NULL);
} else {
tx_param.next_pkt_len =
((skb_next) ? skb_next->len +
sizeof(struct txpd) : 0);
ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
skb, &tx_param);
}
switch (ret) {
case -EBUSY:
dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
ra_list_flags);
mwifiex_write_data_complete(adapter, skb, -1);
return;
}
skb_queue_tail(&ptr->skb_head, skb);
tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
ra_list_flags);
break;
case -1:
adapter->data_sent = false;
dev_err(adapter->dev, "host_to_card failed: %#x\n", ret);
adapter->dbg.num_tx_host_to_card_failure++;
mwifiex_write_data_complete(adapter, skb, ret);
break;
case -EINPROGRESS:
adapter->data_sent = false;
default:
break;
}
if (ret != -EBUSY) {
spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
priv->wmm.packets_out[ptr_index]++;
priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
}
adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
list_first_entry(
&adapter->bss_prio_tbl[priv->bss_priority]
.bss_prio_cur->list,
struct mwifiex_bss_prio_node,
list);
atomic_dec(&priv->wmm.tx_pkts_queued);
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
ra_list_flags);
}
}
/*
* This function dequeues a packet from the highest priority list
* and transmits it.
*/
static int
mwifiex_dequeue_tx_packet(struct mwifiex_adapter *adapter)
{
struct mwifiex_ra_list_tbl *ptr;
struct mwifiex_private *priv = NULL;
int ptr_index = 0;
u8 ra[ETH_ALEN];
int tid_del = 0, tid = 0;
unsigned long flags;
ptr = mwifiex_wmm_get_highest_priolist_ptr(adapter, &priv, &ptr_index);
if (!ptr)
return -1;
tid = mwifiex_get_tid(ptr);
dev_dbg(adapter->dev, "data: tid=%d\n", tid);
spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
return -1;
}
if (mwifiex_is_ptr_processed(priv, ptr)) {
mwifiex_send_processed_packet(priv, ptr, ptr_index, flags);
/* ra_list_spinlock has been freed in
mwifiex_send_processed_packet() */
return 0;
}
if (!ptr->is_11n_enabled ||
mwifiex_is_ba_stream_setup(priv, ptr, tid) ||
priv->wps.session_enable ||
((priv->sec_info.wpa_enabled ||
priv->sec_info.wpa2_enabled) &&
!priv->wpa_is_gtk_set)) {
mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
/* ra_list_spinlock has been freed in
mwifiex_send_single_packet() */
} else {
if (mwifiex_is_ampdu_allowed(priv, tid)) {
if (mwifiex_space_avail_for_new_ba_stream(adapter)) {
mwifiex_create_ba_tbl(priv, ptr->ra, tid,
BA_SETUP_INPROGRESS);
mwifiex_send_addba(priv, tid, ptr->ra);
} else if (mwifiex_find_stream_to_delete
(priv, tid, &tid_del, ra)) {
mwifiex_create_ba_tbl(priv, ptr->ra, tid,
BA_SETUP_INPROGRESS);
mwifiex_send_delba(priv, tid_del, ra, 1);
}
}
if (mwifiex_is_amsdu_allowed(priv, tid) &&
mwifiex_is_11n_aggragation_possible(priv, ptr,
adapter->tx_buf_size))
mwifiex_11n_aggregate_pkt(priv, ptr, INTF_HEADER_LEN,
ptr_index, flags);
/* ra_list_spinlock has been freed in
mwifiex_11n_aggregate_pkt() */
else
mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
/* ra_list_spinlock has been freed in
mwifiex_send_single_packet() */
}
return 0;
}
/*
* This function transmits the highest priority packet awaiting in the
* WMM Queues.
*/
void
mwifiex_wmm_process_tx(struct mwifiex_adapter *adapter)
{
do {
/* Check if busy */
if (adapter->data_sent || adapter->tx_lock_flag)
break;
if (mwifiex_dequeue_tx_packet(adapter))
break;
} while (!mwifiex_wmm_lists_empty(adapter));
}
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