1023 lines
27 KiB
C
1023 lines
27 KiB
C
/*
|
|
* This file is part of wl1271
|
|
*
|
|
* Copyright (C) 2009 Nokia Corporation
|
|
*
|
|
* Contact: Luciano Coelho <luciano.coelho@nokia.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* version 2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
|
|
* 02110-1301 USA
|
|
*
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/etherdevice.h>
|
|
|
|
#include "wl12xx.h"
|
|
#include "io.h"
|
|
#include "reg.h"
|
|
#include "ps.h"
|
|
#include "tx.h"
|
|
#include "event.h"
|
|
|
|
static int wl1271_set_default_wep_key(struct wl1271 *wl,
|
|
struct wl12xx_vif *wlvif, u8 id)
|
|
{
|
|
int ret;
|
|
bool is_ap = (wlvif->bss_type == BSS_TYPE_AP_BSS);
|
|
|
|
if (is_ap)
|
|
ret = wl12xx_cmd_set_default_wep_key(wl, id,
|
|
wl->ap_bcast_hlid);
|
|
else
|
|
ret = wl12xx_cmd_set_default_wep_key(wl, id, wlvif->sta.hlid);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
wl1271_debug(DEBUG_CRYPT, "default wep key idx: %d", (int)id);
|
|
return 0;
|
|
}
|
|
|
|
static int wl1271_alloc_tx_id(struct wl1271 *wl, struct sk_buff *skb)
|
|
{
|
|
int id;
|
|
|
|
id = find_first_zero_bit(wl->tx_frames_map, ACX_TX_DESCRIPTORS);
|
|
if (id >= ACX_TX_DESCRIPTORS)
|
|
return -EBUSY;
|
|
|
|
__set_bit(id, wl->tx_frames_map);
|
|
wl->tx_frames[id] = skb;
|
|
wl->tx_frames_cnt++;
|
|
return id;
|
|
}
|
|
|
|
static void wl1271_free_tx_id(struct wl1271 *wl, int id)
|
|
{
|
|
if (__test_and_clear_bit(id, wl->tx_frames_map)) {
|
|
if (unlikely(wl->tx_frames_cnt == ACX_TX_DESCRIPTORS))
|
|
clear_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags);
|
|
|
|
wl->tx_frames[id] = NULL;
|
|
wl->tx_frames_cnt--;
|
|
}
|
|
}
|
|
|
|
static int wl1271_tx_update_filters(struct wl1271 *wl,
|
|
struct wl12xx_vif *wlvif,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_hdr *hdr;
|
|
int ret;
|
|
|
|
hdr = (struct ieee80211_hdr *)skb->data;
|
|
|
|
/*
|
|
* stop bssid-based filtering before transmitting authentication
|
|
* requests. this way the hw will never drop authentication
|
|
* responses coming from BSSIDs it isn't familiar with (e.g. on
|
|
* roaming)
|
|
*/
|
|
if (!ieee80211_is_auth(hdr->frame_control))
|
|
return 0;
|
|
|
|
if (wl->dev_hlid != WL12XX_INVALID_LINK_ID)
|
|
goto out;
|
|
|
|
wl1271_debug(DEBUG_CMD, "starting device role for roaming");
|
|
ret = wl12xx_cmd_role_start_dev(wl, wlvif);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
ret = wl12xx_roc(wl, wlvif->dev_role_id);
|
|
if (ret < 0)
|
|
goto out;
|
|
out:
|
|
return 0;
|
|
}
|
|
|
|
static void wl1271_tx_ap_update_inconnection_sta(struct wl1271 *wl,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_hdr *hdr;
|
|
|
|
/*
|
|
* add the station to the known list before transmitting the
|
|
* authentication response. this way it won't get de-authed by FW
|
|
* when transmitting too soon.
|
|
*/
|
|
hdr = (struct ieee80211_hdr *)(skb->data +
|
|
sizeof(struct wl1271_tx_hw_descr));
|
|
if (ieee80211_is_auth(hdr->frame_control))
|
|
wl1271_acx_set_inconnection_sta(wl, hdr->addr1);
|
|
}
|
|
|
|
static void wl1271_tx_regulate_link(struct wl1271 *wl, u8 hlid)
|
|
{
|
|
bool fw_ps, single_sta;
|
|
u8 tx_pkts;
|
|
|
|
/* only regulate station links */
|
|
if (hlid < WL1271_AP_STA_HLID_START)
|
|
return;
|
|
|
|
if (WARN_ON(!wl1271_is_active_sta(wl, hlid)))
|
|
return;
|
|
|
|
fw_ps = test_bit(hlid, (unsigned long *)&wl->ap_fw_ps_map);
|
|
tx_pkts = wl->links[hlid].allocated_pkts;
|
|
single_sta = (wl->active_sta_count == 1);
|
|
|
|
/*
|
|
* if in FW PS and there is enough data in FW we can put the link
|
|
* into high-level PS and clean out its TX queues.
|
|
* Make an exception if this is the only connected station. In this
|
|
* case FW-memory congestion is not a problem.
|
|
*/
|
|
if (!single_sta && fw_ps && tx_pkts >= WL1271_PS_STA_MAX_PACKETS)
|
|
wl1271_ps_link_start(wl, hlid, true);
|
|
}
|
|
|
|
bool wl12xx_is_dummy_packet(struct wl1271 *wl, struct sk_buff *skb)
|
|
{
|
|
return wl->dummy_packet == skb;
|
|
}
|
|
|
|
u8 wl12xx_tx_get_hlid_ap(struct wl1271 *wl, struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_tx_info *control = IEEE80211_SKB_CB(skb);
|
|
|
|
if (control->control.sta) {
|
|
struct wl1271_station *wl_sta;
|
|
|
|
wl_sta = (struct wl1271_station *)
|
|
control->control.sta->drv_priv;
|
|
return wl_sta->hlid;
|
|
} else {
|
|
struct ieee80211_hdr *hdr;
|
|
|
|
if (!test_bit(WL1271_FLAG_AP_STARTED, &wl->flags))
|
|
return wl->system_hlid;
|
|
|
|
hdr = (struct ieee80211_hdr *)skb->data;
|
|
if (ieee80211_is_mgmt(hdr->frame_control))
|
|
return wl->ap_global_hlid;
|
|
else
|
|
return wl->ap_bcast_hlid;
|
|
}
|
|
}
|
|
|
|
static u8 wl1271_tx_get_hlid(struct wl1271 *wl, struct ieee80211_vif *vif,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
|
|
struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
|
|
|
|
|
|
if (wl12xx_is_dummy_packet(wl, skb))
|
|
return wl->system_hlid;
|
|
|
|
if (wlvif->bss_type == BSS_TYPE_AP_BSS)
|
|
return wl12xx_tx_get_hlid_ap(wl, skb);
|
|
|
|
wl1271_tx_update_filters(wl, wlvif, skb);
|
|
|
|
if ((test_bit(WL1271_FLAG_STA_ASSOCIATED, &wl->flags) ||
|
|
test_bit(WL1271_FLAG_IBSS_JOINED, &wl->flags)) &&
|
|
!ieee80211_is_auth(hdr->frame_control) &&
|
|
!ieee80211_is_assoc_req(hdr->frame_control))
|
|
return wlvif->sta.hlid;
|
|
else
|
|
return wl->dev_hlid;
|
|
}
|
|
|
|
static unsigned int wl12xx_calc_packet_alignment(struct wl1271 *wl,
|
|
unsigned int packet_length)
|
|
{
|
|
if (wl->quirks & WL12XX_QUIRK_BLOCKSIZE_ALIGNMENT)
|
|
return ALIGN(packet_length, WL12XX_BUS_BLOCK_SIZE);
|
|
else
|
|
return ALIGN(packet_length, WL1271_TX_ALIGN_TO);
|
|
}
|
|
|
|
static int wl1271_tx_allocate(struct wl1271 *wl, struct ieee80211_vif *vif,
|
|
struct sk_buff *skb, u32 extra, u32 buf_offset,
|
|
u8 hlid)
|
|
{
|
|
struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
|
|
struct wl1271_tx_hw_descr *desc;
|
|
u32 total_len = skb->len + sizeof(struct wl1271_tx_hw_descr) + extra;
|
|
u32 len;
|
|
u32 total_blocks;
|
|
int id, ret = -EBUSY, ac;
|
|
u32 spare_blocks = wl->tx_spare_blocks;
|
|
|
|
if (buf_offset + total_len > WL1271_AGGR_BUFFER_SIZE)
|
|
return -EAGAIN;
|
|
|
|
/* allocate free identifier for the packet */
|
|
id = wl1271_alloc_tx_id(wl, skb);
|
|
if (id < 0)
|
|
return id;
|
|
|
|
/* approximate the number of blocks required for this packet
|
|
in the firmware */
|
|
len = wl12xx_calc_packet_alignment(wl, total_len);
|
|
|
|
/* in case of a dummy packet, use default amount of spare mem blocks */
|
|
if (unlikely(wl12xx_is_dummy_packet(wl, skb)))
|
|
spare_blocks = TX_HW_BLOCK_SPARE_DEFAULT;
|
|
|
|
total_blocks = (len + TX_HW_BLOCK_SIZE - 1) / TX_HW_BLOCK_SIZE +
|
|
spare_blocks;
|
|
|
|
if (total_blocks <= wl->tx_blocks_available) {
|
|
desc = (struct wl1271_tx_hw_descr *)skb_push(
|
|
skb, total_len - skb->len);
|
|
|
|
/* HW descriptor fields change between wl127x and wl128x */
|
|
if (wl->chip.id == CHIP_ID_1283_PG20) {
|
|
desc->wl128x_mem.total_mem_blocks = total_blocks;
|
|
} else {
|
|
desc->wl127x_mem.extra_blocks = spare_blocks;
|
|
desc->wl127x_mem.total_mem_blocks = total_blocks;
|
|
}
|
|
|
|
desc->id = id;
|
|
|
|
wl->tx_blocks_available -= total_blocks;
|
|
wl->tx_allocated_blocks += total_blocks;
|
|
|
|
ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
|
|
wl->tx_allocated_pkts[ac]++;
|
|
|
|
if (wlvif->bss_type == BSS_TYPE_AP_BSS &&
|
|
hlid >= WL1271_AP_STA_HLID_START)
|
|
wl->links[hlid].allocated_pkts++;
|
|
|
|
ret = 0;
|
|
|
|
wl1271_debug(DEBUG_TX,
|
|
"tx_allocate: size: %d, blocks: %d, id: %d",
|
|
total_len, total_blocks, id);
|
|
} else {
|
|
wl1271_free_tx_id(wl, id);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct ieee80211_vif *vif,
|
|
struct sk_buff *skb, u32 extra,
|
|
struct ieee80211_tx_info *control, u8 hlid)
|
|
{
|
|
struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
|
|
struct timespec ts;
|
|
struct wl1271_tx_hw_descr *desc;
|
|
int aligned_len, ac, rate_idx;
|
|
s64 hosttime;
|
|
u16 tx_attr;
|
|
|
|
desc = (struct wl1271_tx_hw_descr *) skb->data;
|
|
|
|
/* relocate space for security header */
|
|
if (extra) {
|
|
void *framestart = skb->data + sizeof(*desc);
|
|
u16 fc = *(u16 *)(framestart + extra);
|
|
int hdrlen = ieee80211_hdrlen(cpu_to_le16(fc));
|
|
memmove(framestart, framestart + extra, hdrlen);
|
|
}
|
|
|
|
/* configure packet life time */
|
|
getnstimeofday(&ts);
|
|
hosttime = (timespec_to_ns(&ts) >> 10);
|
|
desc->start_time = cpu_to_le32(hosttime - wl->time_offset);
|
|
|
|
if (wlvif->bss_type != BSS_TYPE_AP_BSS)
|
|
desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU);
|
|
else
|
|
desc->life_time = cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU);
|
|
|
|
/* queue */
|
|
ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
|
|
desc->tid = skb->priority;
|
|
|
|
if (wl12xx_is_dummy_packet(wl, skb)) {
|
|
/*
|
|
* FW expects the dummy packet to have an invalid session id -
|
|
* any session id that is different than the one set in the join
|
|
*/
|
|
tx_attr = ((~wl->session_counter) <<
|
|
TX_HW_ATTR_OFST_SESSION_COUNTER) &
|
|
TX_HW_ATTR_SESSION_COUNTER;
|
|
|
|
tx_attr |= TX_HW_ATTR_TX_DUMMY_REQ;
|
|
} else {
|
|
/* configure the tx attributes */
|
|
tx_attr =
|
|
wl->session_counter << TX_HW_ATTR_OFST_SESSION_COUNTER;
|
|
}
|
|
|
|
desc->hlid = hlid;
|
|
if (wlvif->bss_type != BSS_TYPE_AP_BSS) {
|
|
/* if the packets are destined for AP (have a STA entry)
|
|
send them with AP rate policies, otherwise use default
|
|
basic rates */
|
|
if (control->control.sta)
|
|
rate_idx = ACX_TX_AP_FULL_RATE;
|
|
else
|
|
rate_idx = ACX_TX_BASIC_RATE;
|
|
} else {
|
|
if (hlid == wl->ap_global_hlid)
|
|
rate_idx = ACX_TX_AP_MODE_MGMT_RATE;
|
|
else if (hlid == wl->ap_bcast_hlid)
|
|
rate_idx = ACX_TX_AP_MODE_BCST_RATE;
|
|
else
|
|
rate_idx = ac;
|
|
}
|
|
|
|
tx_attr |= rate_idx << TX_HW_ATTR_OFST_RATE_POLICY;
|
|
desc->reserved = 0;
|
|
|
|
aligned_len = wl12xx_calc_packet_alignment(wl, skb->len);
|
|
|
|
if (wl->chip.id == CHIP_ID_1283_PG20) {
|
|
desc->wl128x_mem.extra_bytes = aligned_len - skb->len;
|
|
desc->length = cpu_to_le16(aligned_len >> 2);
|
|
|
|
wl1271_debug(DEBUG_TX, "tx_fill_hdr: hlid: %d "
|
|
"tx_attr: 0x%x len: %d life: %d mem: %d",
|
|
desc->hlid, tx_attr,
|
|
le16_to_cpu(desc->length),
|
|
le16_to_cpu(desc->life_time),
|
|
desc->wl128x_mem.total_mem_blocks);
|
|
} else {
|
|
int pad;
|
|
|
|
/* Store the aligned length in terms of words */
|
|
desc->length = cpu_to_le16(aligned_len >> 2);
|
|
|
|
/* calculate number of padding bytes */
|
|
pad = aligned_len - skb->len;
|
|
tx_attr |= pad << TX_HW_ATTR_OFST_LAST_WORD_PAD;
|
|
|
|
wl1271_debug(DEBUG_TX, "tx_fill_hdr: pad: %d hlid: %d "
|
|
"tx_attr: 0x%x len: %d life: %d mem: %d", pad,
|
|
desc->hlid, tx_attr,
|
|
le16_to_cpu(desc->length),
|
|
le16_to_cpu(desc->life_time),
|
|
desc->wl127x_mem.total_mem_blocks);
|
|
}
|
|
|
|
desc->tx_attr = cpu_to_le16(tx_attr);
|
|
}
|
|
|
|
/* caller must hold wl->mutex */
|
|
static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct sk_buff *skb,
|
|
u32 buf_offset)
|
|
{
|
|
struct ieee80211_tx_info *info;
|
|
struct ieee80211_vif *vif;
|
|
struct wl12xx_vif *wlvif;
|
|
u32 extra = 0;
|
|
int ret = 0;
|
|
u32 total_len;
|
|
u8 hlid;
|
|
bool is_dummy;
|
|
|
|
if (!skb)
|
|
return -EINVAL;
|
|
|
|
info = IEEE80211_SKB_CB(skb);
|
|
|
|
/* TODO: handle dummy packets on multi-vifs */
|
|
is_dummy = wl12xx_is_dummy_packet(wl, skb);
|
|
if (is_dummy)
|
|
info->control.vif = wl->vif;
|
|
|
|
vif = info->control.vif;
|
|
wlvif = wl12xx_vif_to_data(vif);
|
|
|
|
if (info->control.hw_key &&
|
|
info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP)
|
|
extra = WL1271_TKIP_IV_SPACE;
|
|
|
|
if (info->control.hw_key) {
|
|
bool is_wep;
|
|
u8 idx = info->control.hw_key->hw_key_idx;
|
|
u32 cipher = info->control.hw_key->cipher;
|
|
|
|
is_wep = (cipher == WLAN_CIPHER_SUITE_WEP40) ||
|
|
(cipher == WLAN_CIPHER_SUITE_WEP104);
|
|
|
|
if (unlikely(is_wep && wl->default_key != idx)) {
|
|
ret = wl1271_set_default_wep_key(wl, wlvif, idx);
|
|
if (ret < 0)
|
|
return ret;
|
|
wl->default_key = idx;
|
|
}
|
|
}
|
|
hlid = wl1271_tx_get_hlid(wl, vif, skb);
|
|
if (hlid == WL12XX_INVALID_LINK_ID) {
|
|
wl1271_error("invalid hlid. dropping skb 0x%p", skb);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = wl1271_tx_allocate(wl, vif, skb, extra, buf_offset, hlid);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
wl1271_tx_fill_hdr(wl, vif, skb, extra, info, hlid);
|
|
|
|
if (wlvif->bss_type == BSS_TYPE_AP_BSS && !is_dummy) {
|
|
wl1271_tx_ap_update_inconnection_sta(wl, skb);
|
|
wl1271_tx_regulate_link(wl, hlid);
|
|
}
|
|
|
|
/*
|
|
* The length of each packet is stored in terms of
|
|
* words. Thus, we must pad the skb data to make sure its
|
|
* length is aligned. The number of padding bytes is computed
|
|
* and set in wl1271_tx_fill_hdr.
|
|
* In special cases, we want to align to a specific block size
|
|
* (eg. for wl128x with SDIO we align to 256).
|
|
*/
|
|
total_len = wl12xx_calc_packet_alignment(wl, skb->len);
|
|
|
|
memcpy(wl->aggr_buf + buf_offset, skb->data, skb->len);
|
|
memset(wl->aggr_buf + buf_offset + skb->len, 0, total_len - skb->len);
|
|
|
|
/* Revert side effects in the dummy packet skb, so it can be reused */
|
|
if (is_dummy)
|
|
skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
|
|
|
|
return total_len;
|
|
}
|
|
|
|
u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set,
|
|
enum ieee80211_band rate_band)
|
|
{
|
|
struct ieee80211_supported_band *band;
|
|
u32 enabled_rates = 0;
|
|
int bit;
|
|
|
|
band = wl->hw->wiphy->bands[rate_band];
|
|
for (bit = 0; bit < band->n_bitrates; bit++) {
|
|
if (rate_set & 0x1)
|
|
enabled_rates |= band->bitrates[bit].hw_value;
|
|
rate_set >>= 1;
|
|
}
|
|
|
|
/* MCS rates indication are on bits 16 - 23 */
|
|
rate_set >>= HW_HT_RATES_OFFSET - band->n_bitrates;
|
|
|
|
for (bit = 0; bit < 8; bit++) {
|
|
if (rate_set & 0x1)
|
|
enabled_rates |= (CONF_HW_BIT_RATE_MCS_0 << bit);
|
|
rate_set >>= 1;
|
|
}
|
|
|
|
return enabled_rates;
|
|
}
|
|
|
|
void wl1271_handle_tx_low_watermark(struct wl1271 *wl)
|
|
{
|
|
unsigned long flags;
|
|
int i;
|
|
|
|
for (i = 0; i < NUM_TX_QUEUES; i++) {
|
|
if (test_bit(i, &wl->stopped_queues_map) &&
|
|
wl->tx_queue_count[i] <= WL1271_TX_QUEUE_LOW_WATERMARK) {
|
|
/* firmware buffer has space, restart queues */
|
|
spin_lock_irqsave(&wl->wl_lock, flags);
|
|
ieee80211_wake_queue(wl->hw,
|
|
wl1271_tx_get_mac80211_queue(i));
|
|
clear_bit(i, &wl->stopped_queues_map);
|
|
spin_unlock_irqrestore(&wl->wl_lock, flags);
|
|
}
|
|
}
|
|
}
|
|
|
|
static struct sk_buff_head *wl1271_select_queue(struct wl1271 *wl,
|
|
struct sk_buff_head *queues)
|
|
{
|
|
int i, q = -1, ac;
|
|
u32 min_pkts = 0xffffffff;
|
|
|
|
/*
|
|
* Find a non-empty ac where:
|
|
* 1. There are packets to transmit
|
|
* 2. The FW has the least allocated blocks
|
|
*
|
|
* We prioritize the ACs according to VO>VI>BE>BK
|
|
*/
|
|
for (i = 0; i < NUM_TX_QUEUES; i++) {
|
|
ac = wl1271_tx_get_queue(i);
|
|
if (!skb_queue_empty(&queues[ac]) &&
|
|
(wl->tx_allocated_pkts[ac] < min_pkts)) {
|
|
q = ac;
|
|
min_pkts = wl->tx_allocated_pkts[q];
|
|
}
|
|
}
|
|
|
|
if (q == -1)
|
|
return NULL;
|
|
|
|
return &queues[q];
|
|
}
|
|
|
|
static struct sk_buff *wl1271_sta_skb_dequeue(struct wl1271 *wl)
|
|
{
|
|
struct sk_buff *skb = NULL;
|
|
unsigned long flags;
|
|
struct sk_buff_head *queue;
|
|
|
|
queue = wl1271_select_queue(wl, wl->tx_queue);
|
|
if (!queue)
|
|
goto out;
|
|
|
|
skb = skb_dequeue(queue);
|
|
|
|
out:
|
|
if (skb) {
|
|
int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
|
|
spin_lock_irqsave(&wl->wl_lock, flags);
|
|
wl->tx_queue_count[q]--;
|
|
spin_unlock_irqrestore(&wl->wl_lock, flags);
|
|
}
|
|
|
|
return skb;
|
|
}
|
|
|
|
static struct sk_buff *wl1271_ap_skb_dequeue(struct wl1271 *wl)
|
|
{
|
|
struct sk_buff *skb = NULL;
|
|
unsigned long flags;
|
|
int i, h, start_hlid;
|
|
struct sk_buff_head *queue;
|
|
|
|
/* start from the link after the last one */
|
|
start_hlid = (wl->last_tx_hlid + 1) % AP_MAX_LINKS;
|
|
|
|
/* dequeue according to AC, round robin on each link */
|
|
for (i = 0; i < AP_MAX_LINKS; i++) {
|
|
h = (start_hlid + i) % AP_MAX_LINKS;
|
|
|
|
/* only consider connected stations */
|
|
if (h >= WL1271_AP_STA_HLID_START &&
|
|
!test_bit(h - WL1271_AP_STA_HLID_START, wl->ap_hlid_map))
|
|
continue;
|
|
|
|
queue = wl1271_select_queue(wl, wl->links[h].tx_queue);
|
|
if (!queue)
|
|
continue;
|
|
|
|
skb = skb_dequeue(queue);
|
|
if (skb)
|
|
break;
|
|
}
|
|
|
|
if (skb) {
|
|
int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
|
|
wl->last_tx_hlid = h;
|
|
spin_lock_irqsave(&wl->wl_lock, flags);
|
|
wl->tx_queue_count[q]--;
|
|
spin_unlock_irqrestore(&wl->wl_lock, flags);
|
|
} else {
|
|
wl->last_tx_hlid = 0;
|
|
}
|
|
|
|
return skb;
|
|
}
|
|
|
|
static struct sk_buff *wl1271_skb_dequeue(struct wl1271 *wl,
|
|
struct wl12xx_vif *wlvif)
|
|
{
|
|
unsigned long flags;
|
|
struct sk_buff *skb = NULL;
|
|
|
|
if (wlvif->bss_type == BSS_TYPE_AP_BSS)
|
|
skb = wl1271_ap_skb_dequeue(wl);
|
|
else
|
|
skb = wl1271_sta_skb_dequeue(wl);
|
|
|
|
if (!skb &&
|
|
test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags)) {
|
|
int q;
|
|
|
|
skb = wl->dummy_packet;
|
|
q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
|
|
spin_lock_irqsave(&wl->wl_lock, flags);
|
|
wl->tx_queue_count[q]--;
|
|
spin_unlock_irqrestore(&wl->wl_lock, flags);
|
|
}
|
|
|
|
return skb;
|
|
}
|
|
|
|
static void wl1271_skb_queue_head(struct wl1271 *wl, struct ieee80211_vif *vif,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
|
|
unsigned long flags;
|
|
int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
|
|
|
|
if (wl12xx_is_dummy_packet(wl, skb)) {
|
|
set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags);
|
|
} else if (wlvif->bss_type == BSS_TYPE_AP_BSS) {
|
|
u8 hlid = wl1271_tx_get_hlid(wl, vif, skb);
|
|
skb_queue_head(&wl->links[hlid].tx_queue[q], skb);
|
|
|
|
/* make sure we dequeue the same packet next time */
|
|
wl->last_tx_hlid = (hlid + AP_MAX_LINKS - 1) % AP_MAX_LINKS;
|
|
} else {
|
|
skb_queue_head(&wl->tx_queue[q], skb);
|
|
}
|
|
|
|
spin_lock_irqsave(&wl->wl_lock, flags);
|
|
wl->tx_queue_count[q]++;
|
|
spin_unlock_irqrestore(&wl->wl_lock, flags);
|
|
}
|
|
|
|
static bool wl1271_tx_is_data_present(struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
|
|
|
|
return ieee80211_is_data_present(hdr->frame_control);
|
|
}
|
|
|
|
void wl1271_tx_work_locked(struct wl1271 *wl, struct ieee80211_vif *vif)
|
|
{
|
|
struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
|
|
struct sk_buff *skb;
|
|
u32 buf_offset = 0;
|
|
bool sent_packets = false;
|
|
bool had_data = false;
|
|
bool is_ap = (wlvif->bss_type == BSS_TYPE_AP_BSS);
|
|
int ret;
|
|
|
|
if (unlikely(wl->state == WL1271_STATE_OFF))
|
|
return;
|
|
|
|
while ((skb = wl1271_skb_dequeue(wl, wlvif))) {
|
|
if (wl1271_tx_is_data_present(skb))
|
|
had_data = true;
|
|
|
|
ret = wl1271_prepare_tx_frame(wl, skb, buf_offset);
|
|
if (ret == -EAGAIN) {
|
|
/*
|
|
* Aggregation buffer is full.
|
|
* Flush buffer and try again.
|
|
*/
|
|
wl1271_skb_queue_head(wl, vif, skb);
|
|
wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf,
|
|
buf_offset, true);
|
|
sent_packets = true;
|
|
buf_offset = 0;
|
|
continue;
|
|
} else if (ret == -EBUSY) {
|
|
/*
|
|
* Firmware buffer is full.
|
|
* Queue back last skb, and stop aggregating.
|
|
*/
|
|
wl1271_skb_queue_head(wl, vif, skb);
|
|
/* No work left, avoid scheduling redundant tx work */
|
|
set_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags);
|
|
goto out_ack;
|
|
} else if (ret < 0) {
|
|
dev_kfree_skb(skb);
|
|
goto out_ack;
|
|
}
|
|
buf_offset += ret;
|
|
wl->tx_packets_count++;
|
|
}
|
|
|
|
out_ack:
|
|
if (buf_offset) {
|
|
wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf,
|
|
buf_offset, true);
|
|
sent_packets = true;
|
|
}
|
|
if (sent_packets) {
|
|
/*
|
|
* Interrupt the firmware with the new packets. This is only
|
|
* required for older hardware revisions
|
|
*/
|
|
if (wl->quirks & WL12XX_QUIRK_END_OF_TRANSACTION)
|
|
wl1271_write32(wl, WL1271_HOST_WR_ACCESS,
|
|
wl->tx_packets_count);
|
|
|
|
wl1271_handle_tx_low_watermark(wl);
|
|
}
|
|
if (!is_ap && wl->conf.rx_streaming.interval && had_data &&
|
|
(wl->conf.rx_streaming.always ||
|
|
test_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags))) {
|
|
u32 timeout = wl->conf.rx_streaming.duration;
|
|
|
|
/* enable rx streaming */
|
|
if (!test_bit(WL1271_FLAG_RX_STREAMING_STARTED, &wl->flags))
|
|
ieee80211_queue_work(wl->hw,
|
|
&wl->rx_streaming_enable_work);
|
|
|
|
mod_timer(&wl->rx_streaming_timer,
|
|
jiffies + msecs_to_jiffies(timeout));
|
|
}
|
|
}
|
|
|
|
void wl1271_tx_work(struct work_struct *work)
|
|
{
|
|
struct wl1271 *wl = container_of(work, struct wl1271, tx_work);
|
|
int ret;
|
|
|
|
mutex_lock(&wl->mutex);
|
|
ret = wl1271_ps_elp_wakeup(wl);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
wl1271_tx_work_locked(wl, wl->vif);
|
|
|
|
wl1271_ps_elp_sleep(wl);
|
|
out:
|
|
mutex_unlock(&wl->mutex);
|
|
}
|
|
|
|
static void wl1271_tx_complete_packet(struct wl1271 *wl,
|
|
struct wl1271_tx_hw_res_descr *result)
|
|
{
|
|
struct ieee80211_tx_info *info;
|
|
struct sk_buff *skb;
|
|
int id = result->id;
|
|
int rate = -1;
|
|
u8 retries = 0;
|
|
|
|
/* check for id legality */
|
|
if (unlikely(id >= ACX_TX_DESCRIPTORS || wl->tx_frames[id] == NULL)) {
|
|
wl1271_warning("TX result illegal id: %d", id);
|
|
return;
|
|
}
|
|
|
|
skb = wl->tx_frames[id];
|
|
info = IEEE80211_SKB_CB(skb);
|
|
|
|
if (wl12xx_is_dummy_packet(wl, skb)) {
|
|
wl1271_free_tx_id(wl, id);
|
|
return;
|
|
}
|
|
|
|
/* update the TX status info */
|
|
if (result->status == TX_SUCCESS) {
|
|
if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
|
|
info->flags |= IEEE80211_TX_STAT_ACK;
|
|
rate = wl1271_rate_to_idx(result->rate_class_index, wl->band);
|
|
retries = result->ack_failures;
|
|
} else if (result->status == TX_RETRY_EXCEEDED) {
|
|
wl->stats.excessive_retries++;
|
|
retries = result->ack_failures;
|
|
}
|
|
|
|
info->status.rates[0].idx = rate;
|
|
info->status.rates[0].count = retries;
|
|
info->status.rates[0].flags = 0;
|
|
info->status.ack_signal = -1;
|
|
|
|
wl->stats.retry_count += result->ack_failures;
|
|
|
|
/*
|
|
* update sequence number only when relevant, i.e. only in
|
|
* sessions of TKIP, AES and GEM (not in open or WEP sessions)
|
|
*/
|
|
if (info->control.hw_key &&
|
|
(info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP ||
|
|
info->control.hw_key->cipher == WLAN_CIPHER_SUITE_CCMP ||
|
|
info->control.hw_key->cipher == WL1271_CIPHER_SUITE_GEM)) {
|
|
u8 fw_lsb = result->tx_security_sequence_number_lsb;
|
|
u8 cur_lsb = wl->tx_security_last_seq_lsb;
|
|
|
|
/*
|
|
* update security sequence number, taking care of potential
|
|
* wrap-around
|
|
*/
|
|
wl->tx_security_seq += (fw_lsb - cur_lsb + 256) % 256;
|
|
wl->tx_security_last_seq_lsb = fw_lsb;
|
|
}
|
|
|
|
/* remove private header from packet */
|
|
skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
|
|
|
|
/* remove TKIP header space if present */
|
|
if (info->control.hw_key &&
|
|
info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) {
|
|
int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
|
|
memmove(skb->data + WL1271_TKIP_IV_SPACE, skb->data, hdrlen);
|
|
skb_pull(skb, WL1271_TKIP_IV_SPACE);
|
|
}
|
|
|
|
wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x"
|
|
" status 0x%x",
|
|
result->id, skb, result->ack_failures,
|
|
result->rate_class_index, result->status);
|
|
|
|
/* return the packet to the stack */
|
|
skb_queue_tail(&wl->deferred_tx_queue, skb);
|
|
queue_work(wl->freezable_wq, &wl->netstack_work);
|
|
wl1271_free_tx_id(wl, result->id);
|
|
}
|
|
|
|
/* Called upon reception of a TX complete interrupt */
|
|
void wl1271_tx_complete(struct wl1271 *wl)
|
|
{
|
|
struct wl1271_acx_mem_map *memmap =
|
|
(struct wl1271_acx_mem_map *)wl->target_mem_map;
|
|
u32 count, fw_counter;
|
|
u32 i;
|
|
|
|
/* read the tx results from the chipset */
|
|
wl1271_read(wl, le32_to_cpu(memmap->tx_result),
|
|
wl->tx_res_if, sizeof(*wl->tx_res_if), false);
|
|
fw_counter = le32_to_cpu(wl->tx_res_if->tx_result_fw_counter);
|
|
|
|
/* write host counter to chipset (to ack) */
|
|
wl1271_write32(wl, le32_to_cpu(memmap->tx_result) +
|
|
offsetof(struct wl1271_tx_hw_res_if,
|
|
tx_result_host_counter), fw_counter);
|
|
|
|
count = fw_counter - wl->tx_results_count;
|
|
wl1271_debug(DEBUG_TX, "tx_complete received, packets: %d", count);
|
|
|
|
/* verify that the result buffer is not getting overrun */
|
|
if (unlikely(count > TX_HW_RESULT_QUEUE_LEN))
|
|
wl1271_warning("TX result overflow from chipset: %d", count);
|
|
|
|
/* process the results */
|
|
for (i = 0; i < count; i++) {
|
|
struct wl1271_tx_hw_res_descr *result;
|
|
u8 offset = wl->tx_results_count & TX_HW_RESULT_QUEUE_LEN_MASK;
|
|
|
|
/* process the packet */
|
|
result = &(wl->tx_res_if->tx_results_queue[offset]);
|
|
wl1271_tx_complete_packet(wl, result);
|
|
|
|
wl->tx_results_count++;
|
|
}
|
|
}
|
|
|
|
void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid)
|
|
{
|
|
struct sk_buff *skb;
|
|
int i;
|
|
unsigned long flags;
|
|
struct ieee80211_tx_info *info;
|
|
int total[NUM_TX_QUEUES];
|
|
|
|
for (i = 0; i < NUM_TX_QUEUES; i++) {
|
|
total[i] = 0;
|
|
while ((skb = skb_dequeue(&wl->links[hlid].tx_queue[i]))) {
|
|
wl1271_debug(DEBUG_TX, "link freeing skb 0x%p", skb);
|
|
|
|
if (!wl12xx_is_dummy_packet(wl, skb)) {
|
|
info = IEEE80211_SKB_CB(skb);
|
|
info->status.rates[0].idx = -1;
|
|
info->status.rates[0].count = 0;
|
|
ieee80211_tx_status_ni(wl->hw, skb);
|
|
}
|
|
|
|
total[i]++;
|
|
}
|
|
}
|
|
|
|
spin_lock_irqsave(&wl->wl_lock, flags);
|
|
for (i = 0; i < NUM_TX_QUEUES; i++)
|
|
wl->tx_queue_count[i] -= total[i];
|
|
spin_unlock_irqrestore(&wl->wl_lock, flags);
|
|
|
|
wl1271_handle_tx_low_watermark(wl);
|
|
}
|
|
|
|
/* caller must hold wl->mutex and TX must be stopped */
|
|
void wl1271_tx_reset(struct wl1271 *wl, bool reset_tx_queues)
|
|
{
|
|
struct ieee80211_vif *vif = wl->vif; /* TODO: get as param */
|
|
struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
|
|
int i;
|
|
struct sk_buff *skb;
|
|
struct ieee80211_tx_info *info;
|
|
|
|
/* TX failure */
|
|
if (wlvif->bss_type == BSS_TYPE_AP_BSS) {
|
|
for (i = 0; i < AP_MAX_LINKS; i++) {
|
|
wl1271_free_sta(wl, i);
|
|
wl1271_tx_reset_link_queues(wl, i);
|
|
wl->links[i].allocated_pkts = 0;
|
|
wl->links[i].prev_freed_pkts = 0;
|
|
}
|
|
|
|
wl->last_tx_hlid = 0;
|
|
} else {
|
|
for (i = 0; i < NUM_TX_QUEUES; i++) {
|
|
while ((skb = skb_dequeue(&wl->tx_queue[i]))) {
|
|
wl1271_debug(DEBUG_TX, "freeing skb 0x%p",
|
|
skb);
|
|
|
|
if (!wl12xx_is_dummy_packet(wl, skb)) {
|
|
info = IEEE80211_SKB_CB(skb);
|
|
info->status.rates[0].idx = -1;
|
|
info->status.rates[0].count = 0;
|
|
ieee80211_tx_status_ni(wl->hw, skb);
|
|
}
|
|
}
|
|
}
|
|
|
|
wl->ba_rx_bitmap = 0;
|
|
}
|
|
|
|
for (i = 0; i < NUM_TX_QUEUES; i++)
|
|
wl->tx_queue_count[i] = 0;
|
|
|
|
wl->stopped_queues_map = 0;
|
|
|
|
/*
|
|
* Make sure the driver is at a consistent state, in case this
|
|
* function is called from a context other than interface removal.
|
|
* This call will always wake the TX queues.
|
|
*/
|
|
if (reset_tx_queues)
|
|
wl1271_handle_tx_low_watermark(wl);
|
|
|
|
for (i = 0; i < ACX_TX_DESCRIPTORS; i++) {
|
|
if (wl->tx_frames[i] == NULL)
|
|
continue;
|
|
|
|
skb = wl->tx_frames[i];
|
|
wl1271_free_tx_id(wl, i);
|
|
wl1271_debug(DEBUG_TX, "freeing skb 0x%p", skb);
|
|
|
|
if (!wl12xx_is_dummy_packet(wl, skb)) {
|
|
/*
|
|
* Remove private headers before passing the skb to
|
|
* mac80211
|
|
*/
|
|
info = IEEE80211_SKB_CB(skb);
|
|
skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
|
|
if (info->control.hw_key &&
|
|
info->control.hw_key->cipher ==
|
|
WLAN_CIPHER_SUITE_TKIP) {
|
|
int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
|
|
memmove(skb->data + WL1271_TKIP_IV_SPACE,
|
|
skb->data, hdrlen);
|
|
skb_pull(skb, WL1271_TKIP_IV_SPACE);
|
|
}
|
|
|
|
info->status.rates[0].idx = -1;
|
|
info->status.rates[0].count = 0;
|
|
|
|
ieee80211_tx_status_ni(wl->hw, skb);
|
|
}
|
|
}
|
|
}
|
|
|
|
#define WL1271_TX_FLUSH_TIMEOUT 500000
|
|
|
|
/* caller must *NOT* hold wl->mutex */
|
|
void wl1271_tx_flush(struct wl1271 *wl)
|
|
{
|
|
unsigned long timeout;
|
|
timeout = jiffies + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT);
|
|
|
|
while (!time_after(jiffies, timeout)) {
|
|
mutex_lock(&wl->mutex);
|
|
wl1271_debug(DEBUG_TX, "flushing tx buffer: %d %d",
|
|
wl->tx_frames_cnt,
|
|
wl1271_tx_total_queue_count(wl));
|
|
if ((wl->tx_frames_cnt == 0) &&
|
|
(wl1271_tx_total_queue_count(wl) == 0)) {
|
|
mutex_unlock(&wl->mutex);
|
|
return;
|
|
}
|
|
mutex_unlock(&wl->mutex);
|
|
msleep(1);
|
|
}
|
|
|
|
wl1271_warning("Unable to flush all TX buffers, timed out.");
|
|
}
|
|
|
|
u32 wl1271_tx_min_rate_get(struct wl1271 *wl, u32 rate_set)
|
|
{
|
|
if (WARN_ON(!rate_set))
|
|
return 0;
|
|
|
|
return BIT(__ffs(rate_set));
|
|
}
|