423 lines
13 KiB
C
423 lines
13 KiB
C
/*
|
|
* Marvell Wireless LAN device driver: 802.11n Aggregation
|
|
*
|
|
* 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_aggr.h"
|
|
|
|
/*
|
|
* Creates an AMSDU subframe for aggregation into one AMSDU packet.
|
|
*
|
|
* The resultant AMSDU subframe format is -
|
|
*
|
|
* +---- ~ -----+---- ~ ------+---- ~ -----+----- ~ -----+---- ~ -----+
|
|
* | DA | SA | Length | SNAP header | MSDU |
|
|
* | data[0..5] | data[6..11] | | | data[14..] |
|
|
* +---- ~ -----+---- ~ ------+---- ~ -----+----- ~ -----+---- ~ -----+
|
|
* <--6-bytes--> <--6-bytes--> <--2-bytes--><--8-bytes--> <--n-bytes-->
|
|
*
|
|
* This function also computes the amount of padding required to make the
|
|
* buffer length multiple of 4 bytes.
|
|
*
|
|
* Data => |DA|SA|SNAP-TYPE|........ .|
|
|
* MSDU => |DA|SA|Length|SNAP|...... ..|
|
|
*/
|
|
static int
|
|
mwifiex_11n_form_amsdu_pkt(struct sk_buff *skb_aggr,
|
|
struct sk_buff *skb_src, int *pad)
|
|
|
|
{
|
|
int dt_offset;
|
|
struct rfc_1042_hdr snap = {
|
|
0xaa, /* LLC DSAP */
|
|
0xaa, /* LLC SSAP */
|
|
0x03, /* LLC CTRL */
|
|
{0x00, 0x00, 0x00}, /* SNAP OUI */
|
|
0x0000 /* SNAP type */
|
|
/*
|
|
* This field will be overwritten
|
|
* later with ethertype
|
|
*/
|
|
};
|
|
struct tx_packet_hdr *tx_header = NULL;
|
|
|
|
skb_put(skb_aggr, sizeof(*tx_header));
|
|
|
|
tx_header = (struct tx_packet_hdr *) skb_aggr->data;
|
|
|
|
/* Copy DA and SA */
|
|
dt_offset = 2 * ETH_ALEN;
|
|
memcpy(&tx_header->eth803_hdr, skb_src->data, dt_offset);
|
|
|
|
/* Copy SNAP header */
|
|
snap.snap_type = *(u16 *) ((u8 *)skb_src->data + dt_offset);
|
|
dt_offset += sizeof(u16);
|
|
|
|
memcpy(&tx_header->rfc1042_hdr, &snap, sizeof(struct rfc_1042_hdr));
|
|
|
|
skb_pull(skb_src, dt_offset);
|
|
|
|
/* Update Length field */
|
|
tx_header->eth803_hdr.h_proto = htons(skb_src->len + LLC_SNAP_LEN);
|
|
|
|
/* Add payload */
|
|
skb_put(skb_aggr, skb_src->len);
|
|
memcpy(skb_aggr->data + sizeof(*tx_header), skb_src->data,
|
|
skb_src->len);
|
|
*pad = (((skb_src->len + LLC_SNAP_LEN) & 3)) ? (4 - (((skb_src->len +
|
|
LLC_SNAP_LEN)) & 3)) : 0;
|
|
skb_put(skb_aggr, *pad);
|
|
|
|
return skb_aggr->len + *pad;
|
|
}
|
|
|
|
/*
|
|
* Adds TxPD to AMSDU header.
|
|
*
|
|
* Each AMSDU packet will contain one TxPD at the beginning,
|
|
* followed by multiple AMSDU subframes.
|
|
*/
|
|
static void
|
|
mwifiex_11n_form_amsdu_txpd(struct mwifiex_private *priv,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct txpd *local_tx_pd;
|
|
|
|
skb_push(skb, sizeof(*local_tx_pd));
|
|
|
|
local_tx_pd = (struct txpd *) skb->data;
|
|
memset(local_tx_pd, 0, sizeof(struct txpd));
|
|
|
|
/* Original priority has been overwritten */
|
|
local_tx_pd->priority = (u8) skb->priority;
|
|
local_tx_pd->pkt_delay_2ms =
|
|
mwifiex_wmm_compute_drv_pkt_delay(priv, skb);
|
|
local_tx_pd->bss_num = priv->bss_num;
|
|
local_tx_pd->bss_type = priv->bss_type;
|
|
/* Always zero as the data is followed by struct txpd */
|
|
local_tx_pd->tx_pkt_offset = cpu_to_le16(sizeof(struct txpd));
|
|
local_tx_pd->tx_pkt_type = cpu_to_le16(PKT_TYPE_AMSDU);
|
|
local_tx_pd->tx_pkt_length = cpu_to_le16(skb->len -
|
|
sizeof(*local_tx_pd));
|
|
|
|
if (local_tx_pd->tx_control == 0)
|
|
/* TxCtrl set by user or default */
|
|
local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl);
|
|
|
|
if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) &&
|
|
(priv->adapter->pps_uapsd_mode)) {
|
|
if (true == mwifiex_check_last_packet_indication(priv)) {
|
|
priv->adapter->tx_lock_flag = true;
|
|
local_tx_pd->flags =
|
|
MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Counts the number of subframes in an aggregate packet.
|
|
*
|
|
* This function parses an aggregate packet buffer, looking for
|
|
* subframes and counting the number of such subframe found. The
|
|
* function automatically skips the DA/SA fields at the beginning
|
|
* of each subframe and padding at the end.
|
|
*/
|
|
static int
|
|
mwifiex_11n_get_num_aggr_pkts(u8 *data, int total_pkt_len)
|
|
{
|
|
int pkt_count = 0, pkt_len, pad;
|
|
|
|
while (total_pkt_len > 0) {
|
|
/* Length will be in network format, change it to host */
|
|
pkt_len = ntohs((*(__be16 *)(data + 2 * ETH_ALEN)));
|
|
pad = (((pkt_len + sizeof(struct ethhdr)) & 3)) ?
|
|
(4 - ((pkt_len + sizeof(struct ethhdr)) & 3)) : 0;
|
|
data += pkt_len + pad + sizeof(struct ethhdr);
|
|
total_pkt_len -= pkt_len + pad + sizeof(struct ethhdr);
|
|
++pkt_count;
|
|
}
|
|
|
|
return pkt_count;
|
|
}
|
|
|
|
/*
|
|
* De-aggregate received packets.
|
|
*
|
|
* This function parses the received aggregate buffer, extracts each subframe,
|
|
* strips off the SNAP header from them and sends the data portion for further
|
|
* processing.
|
|
*
|
|
* Each subframe body is copied onto a separate buffer, which are freed by
|
|
* upper layer after processing. The function also performs sanity tests on
|
|
* the received buffer.
|
|
*/
|
|
int mwifiex_11n_deaggregate_pkt(struct mwifiex_private *priv,
|
|
struct sk_buff *skb)
|
|
{
|
|
u16 pkt_len;
|
|
int total_pkt_len;
|
|
u8 *data;
|
|
int pad;
|
|
struct mwifiex_rxinfo *rx_info = MWIFIEX_SKB_RXCB(skb);
|
|
struct rxpd *local_rx_pd = (struct rxpd *) skb->data;
|
|
struct sk_buff *skb_daggr;
|
|
struct mwifiex_rxinfo *rx_info_daggr = NULL;
|
|
int ret = -1;
|
|
struct rx_packet_hdr *rx_pkt_hdr;
|
|
struct mwifiex_adapter *adapter = priv->adapter;
|
|
u8 rfc1042_eth_hdr[ETH_ALEN] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
|
|
|
|
data = (u8 *) (local_rx_pd + local_rx_pd->rx_pkt_offset);
|
|
total_pkt_len = local_rx_pd->rx_pkt_length;
|
|
|
|
/* Sanity test */
|
|
if (total_pkt_len > MWIFIEX_RX_DATA_BUF_SIZE) {
|
|
dev_err(adapter->dev, "total pkt len greater than buffer"
|
|
" size %d\n", total_pkt_len);
|
|
return -1;
|
|
}
|
|
|
|
rx_info->use_count = mwifiex_11n_get_num_aggr_pkts(data, total_pkt_len);
|
|
|
|
while (total_pkt_len > 0) {
|
|
rx_pkt_hdr = (struct rx_packet_hdr *) data;
|
|
/* Length will be in network format, change it to host */
|
|
pkt_len = ntohs((*(__be16 *) (data + 2 * ETH_ALEN)));
|
|
if (pkt_len > total_pkt_len) {
|
|
dev_err(adapter->dev, "pkt_len %d > total_pkt_len %d\n",
|
|
total_pkt_len, pkt_len);
|
|
break;
|
|
}
|
|
|
|
pad = (((pkt_len + sizeof(struct ethhdr)) & 3)) ?
|
|
(4 - ((pkt_len + sizeof(struct ethhdr)) & 3)) : 0;
|
|
|
|
total_pkt_len -= pkt_len + pad + sizeof(struct ethhdr);
|
|
|
|
if (memcmp(&rx_pkt_hdr->rfc1042_hdr,
|
|
rfc1042_eth_hdr, sizeof(rfc1042_eth_hdr)) == 0) {
|
|
memmove(data + LLC_SNAP_LEN, data, 2 * ETH_ALEN);
|
|
data += LLC_SNAP_LEN;
|
|
pkt_len += sizeof(struct ethhdr) - LLC_SNAP_LEN;
|
|
} else {
|
|
*(u16 *) (data + 2 * ETH_ALEN) = (u16) 0;
|
|
pkt_len += sizeof(struct ethhdr);
|
|
}
|
|
|
|
skb_daggr = dev_alloc_skb(pkt_len);
|
|
if (!skb_daggr) {
|
|
dev_err(adapter->dev, "%s: failed to alloc skb_daggr\n",
|
|
__func__);
|
|
return -1;
|
|
}
|
|
rx_info_daggr = MWIFIEX_SKB_RXCB(skb_daggr);
|
|
|
|
rx_info_daggr->bss_index = rx_info->bss_index;
|
|
skb_daggr->tstamp = skb->tstamp;
|
|
rx_info_daggr->parent = skb;
|
|
skb_daggr->priority = skb->priority;
|
|
skb_put(skb_daggr, pkt_len);
|
|
memcpy(skb_daggr->data, data, pkt_len);
|
|
|
|
ret = mwifiex_recv_packet(adapter, skb_daggr);
|
|
|
|
switch (ret) {
|
|
case -EINPROGRESS:
|
|
break;
|
|
case -1:
|
|
dev_err(adapter->dev, "deaggr: host_to_card failed\n");
|
|
case 0:
|
|
mwifiex_recv_packet_complete(adapter, skb_daggr, ret);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
data += pkt_len + pad;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Create aggregated packet.
|
|
*
|
|
* This function creates an aggregated MSDU packet, by combining buffers
|
|
* from the RA list. Each individual buffer is encapsulated as an AMSDU
|
|
* subframe and all such subframes are concatenated together to form the
|
|
* AMSDU packet.
|
|
*
|
|
* A TxPD is also added to the front of the resultant AMSDU packets for
|
|
* transmission. The resultant packets format is -
|
|
*
|
|
* +---- ~ ----+------ ~ ------+------ ~ ------+-..-+------ ~ ------+
|
|
* | TxPD |AMSDU sub-frame|AMSDU sub-frame| .. |AMSDU sub-frame|
|
|
* | | 1 | 2 | .. | n |
|
|
* +---- ~ ----+------ ~ ------+------ ~ ------+ .. +------ ~ ------+
|
|
*/
|
|
int
|
|
mwifiex_11n_aggregate_pkt(struct mwifiex_private *priv,
|
|
struct mwifiex_ra_list_tbl *pra_list, int headroom,
|
|
int ptrindex, unsigned long ra_list_flags)
|
|
__releases(&priv->wmm.ra_list_spinlock)
|
|
{
|
|
struct mwifiex_adapter *adapter = priv->adapter;
|
|
struct sk_buff *skb_aggr, *skb_src;
|
|
struct mwifiex_txinfo *tx_info_aggr, *tx_info_src;
|
|
int pad = 0;
|
|
int ret = 0;
|
|
struct mwifiex_tx_param tx_param;
|
|
struct txpd *ptx_pd = NULL;
|
|
|
|
if (skb_queue_empty(&pra_list->skb_head)) {
|
|
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
|
|
ra_list_flags);
|
|
return 0;
|
|
}
|
|
skb_src = skb_peek(&pra_list->skb_head);
|
|
tx_info_src = MWIFIEX_SKB_TXCB(skb_src);
|
|
skb_aggr = dev_alloc_skb(adapter->tx_buf_size);
|
|
if (!skb_aggr) {
|
|
dev_err(adapter->dev, "%s: alloc skb_aggr\n", __func__);
|
|
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
|
|
ra_list_flags);
|
|
return -1;
|
|
}
|
|
skb_reserve(skb_aggr, headroom + sizeof(struct txpd));
|
|
tx_info_aggr = MWIFIEX_SKB_TXCB(skb_aggr);
|
|
|
|
tx_info_aggr->bss_index = tx_info_src->bss_index;
|
|
skb_aggr->priority = skb_src->priority;
|
|
|
|
while (skb_src && ((skb_headroom(skb_aggr) + skb_src->len
|
|
+ LLC_SNAP_LEN)
|
|
<= adapter->tx_buf_size)) {
|
|
|
|
if (!skb_queue_empty(&pra_list->skb_head))
|
|
skb_src = skb_dequeue(&pra_list->skb_head);
|
|
else
|
|
skb_src = NULL;
|
|
|
|
pra_list->total_pkts_size -= skb_src->len;
|
|
|
|
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
|
|
ra_list_flags);
|
|
mwifiex_11n_form_amsdu_pkt(skb_aggr, skb_src, &pad);
|
|
|
|
mwifiex_write_data_complete(adapter, skb_src, 0);
|
|
|
|
spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
|
|
|
|
if (!mwifiex_is_ralist_valid(priv, pra_list, ptrindex)) {
|
|
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
|
|
ra_list_flags);
|
|
return -1;
|
|
}
|
|
|
|
if (!skb_queue_empty(&pra_list->skb_head))
|
|
skb_src = skb_peek(&pra_list->skb_head);
|
|
else
|
|
skb_src = NULL;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
|
|
|
|
/* Last AMSDU packet does not need padding */
|
|
skb_trim(skb_aggr, skb_aggr->len - pad);
|
|
|
|
/* Form AMSDU */
|
|
mwifiex_11n_form_amsdu_txpd(priv, skb_aggr);
|
|
if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA)
|
|
ptx_pd = (struct txpd *)skb_aggr->data;
|
|
|
|
skb_push(skb_aggr, headroom);
|
|
|
|
tx_param.next_pkt_len = ((pra_list->total_pkts_size) ?
|
|
(((pra_list->total_pkts_size) >
|
|
adapter->tx_buf_size) ? adapter->
|
|
tx_buf_size : pra_list->total_pkts_size +
|
|
LLC_SNAP_LEN + sizeof(struct txpd)) : 0);
|
|
ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
|
|
skb_aggr->data,
|
|
skb_aggr->len, &tx_param);
|
|
switch (ret) {
|
|
case -EBUSY:
|
|
spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
|
|
if (!mwifiex_is_ralist_valid(priv, pra_list, ptrindex)) {
|
|
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
|
|
ra_list_flags);
|
|
mwifiex_write_data_complete(adapter, skb_aggr, -1);
|
|
return -1;
|
|
}
|
|
if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) &&
|
|
(adapter->pps_uapsd_mode) &&
|
|
(adapter->tx_lock_flag)) {
|
|
priv->adapter->tx_lock_flag = false;
|
|
ptx_pd->flags = 0;
|
|
}
|
|
|
|
skb_queue_tail(&pra_list->skb_head, skb_aggr);
|
|
|
|
pra_list->total_pkts_size += skb_aggr->len;
|
|
|
|
tx_info_aggr->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
|
|
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
|
|
ra_list_flags);
|
|
dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
|
|
break;
|
|
case -1:
|
|
adapter->data_sent = false;
|
|
dev_err(adapter->dev, "%s: host_to_card failed: %#x\n",
|
|
__func__, ret);
|
|
adapter->dbg.num_tx_host_to_card_failure++;
|
|
mwifiex_write_data_complete(adapter, skb_aggr, ret);
|
|
return 0;
|
|
case -EINPROGRESS:
|
|
adapter->data_sent = false;
|
|
break;
|
|
case 0:
|
|
mwifiex_write_data_complete(adapter, skb_aggr, ret);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (ret != -EBUSY) {
|
|
spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
|
|
if (mwifiex_is_ralist_valid(priv, pra_list, ptrindex)) {
|
|
priv->wmm.packets_out[ptrindex]++;
|
|
priv->wmm.tid_tbl_ptr[ptrindex].ra_list_curr = pra_list;
|
|
}
|
|
/* Now bss_prio_cur pointer points to next node */
|
|
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);
|
|
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
|
|
ra_list_flags);
|
|
}
|
|
|
|
return 0;
|
|
}
|