/*
|
* Copyright (c) 2004-2011 Atheros Communications Inc.
|
* Copyright (c) 2011-2012 Qualcomm Atheros, Inc.
|
*
|
* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
|
*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
*/
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
#include "core.h"
|
#include "debug.h"
|
#include "htc-ops.h"
|
#include "trace.h"
|
|
/*
|
* tid - tid_mux0..tid_mux3
|
* aid - tid_mux4..tid_mux7
|
*/
|
#define ATH6KL_TID_MASK 0xf
|
#define ATH6KL_AID_SHIFT 4
|
|
static inline u8 ath6kl_get_tid(u8 tid_mux)
|
{
|
return tid_mux & ATH6KL_TID_MASK;
|
}
|
|
static inline u8 ath6kl_get_aid(u8 tid_mux)
|
{
|
return tid_mux >> ATH6KL_AID_SHIFT;
|
}
|
|
static u8 ath6kl_ibss_map_epid(struct sk_buff *skb, struct net_device *dev,
|
u32 *map_no)
|
{
|
struct ath6kl *ar = ath6kl_priv(dev);
|
struct ethhdr *eth_hdr;
|
u32 i, ep_map = -1;
|
u8 *datap;
|
|
*map_no = 0;
|
datap = skb->data;
|
eth_hdr = (struct ethhdr *) (datap + sizeof(struct wmi_data_hdr));
|
|
if (is_multicast_ether_addr(eth_hdr->h_dest))
|
return ENDPOINT_2;
|
|
for (i = 0; i < ar->node_num; i++) {
|
if (memcmp(eth_hdr->h_dest, ar->node_map[i].mac_addr,
|
ETH_ALEN) == 0) {
|
*map_no = i + 1;
|
ar->node_map[i].tx_pend++;
|
return ar->node_map[i].ep_id;
|
}
|
|
if ((ep_map == -1) && !ar->node_map[i].tx_pend)
|
ep_map = i;
|
}
|
|
if (ep_map == -1) {
|
ep_map = ar->node_num;
|
ar->node_num++;
|
if (ar->node_num > MAX_NODE_NUM)
|
return ENDPOINT_UNUSED;
|
}
|
|
memcpy(ar->node_map[ep_map].mac_addr, eth_hdr->h_dest, ETH_ALEN);
|
|
for (i = ENDPOINT_2; i <= ENDPOINT_5; i++) {
|
if (!ar->tx_pending[i]) {
|
ar->node_map[ep_map].ep_id = i;
|
break;
|
}
|
|
/*
|
* No free endpoint is available, start redistribution on
|
* the inuse endpoints.
|
*/
|
if (i == ENDPOINT_5) {
|
ar->node_map[ep_map].ep_id = ar->next_ep_id;
|
ar->next_ep_id++;
|
if (ar->next_ep_id > ENDPOINT_5)
|
ar->next_ep_id = ENDPOINT_2;
|
}
|
}
|
|
*map_no = ep_map + 1;
|
ar->node_map[ep_map].tx_pend++;
|
|
return ar->node_map[ep_map].ep_id;
|
}
|
|
static bool ath6kl_process_uapsdq(struct ath6kl_sta *conn,
|
struct ath6kl_vif *vif,
|
struct sk_buff *skb,
|
u32 *flags)
|
{
|
struct ath6kl *ar = vif->ar;
|
bool is_apsdq_empty = false;
|
struct ethhdr *datap = (struct ethhdr *) skb->data;
|
u8 up = 0, traffic_class, *ip_hdr;
|
u16 ether_type;
|
struct ath6kl_llc_snap_hdr *llc_hdr;
|
|
if (conn->sta_flags & STA_PS_APSD_TRIGGER) {
|
/*
|
* This tx is because of a uAPSD trigger, determine
|
* more and EOSP bit. Set EOSP if queue is empty
|
* or sufficient frames are delivered for this trigger.
|
*/
|
spin_lock_bh(&conn->psq_lock);
|
if (!skb_queue_empty(&conn->apsdq))
|
*flags |= WMI_DATA_HDR_FLAGS_MORE;
|
else if (conn->sta_flags & STA_PS_APSD_EOSP)
|
*flags |= WMI_DATA_HDR_FLAGS_EOSP;
|
*flags |= WMI_DATA_HDR_FLAGS_UAPSD;
|
spin_unlock_bh(&conn->psq_lock);
|
return false;
|
} else if (!conn->apsd_info) {
|
return false;
|
}
|
|
if (test_bit(WMM_ENABLED, &vif->flags)) {
|
ether_type = be16_to_cpu(datap->h_proto);
|
if (is_ethertype(ether_type)) {
|
/* packet is in DIX format */
|
ip_hdr = (u8 *)(datap + 1);
|
} else {
|
/* packet is in 802.3 format */
|
llc_hdr = (struct ath6kl_llc_snap_hdr *)
|
(datap + 1);
|
ether_type = be16_to_cpu(llc_hdr->eth_type);
|
ip_hdr = (u8 *)(llc_hdr + 1);
|
}
|
|
if (ether_type == IP_ETHERTYPE)
|
up = ath6kl_wmi_determine_user_priority(
|
ip_hdr, 0);
|
}
|
|
traffic_class = ath6kl_wmi_get_traffic_class(up);
|
|
if ((conn->apsd_info & (1 << traffic_class)) == 0)
|
return false;
|
|
/* Queue the frames if the STA is sleeping */
|
spin_lock_bh(&conn->psq_lock);
|
is_apsdq_empty = skb_queue_empty(&conn->apsdq);
|
skb_queue_tail(&conn->apsdq, skb);
|
spin_unlock_bh(&conn->psq_lock);
|
|
/*
|
* If this is the first pkt getting queued
|
* for this STA, update the PVB for this STA
|
*/
|
if (is_apsdq_empty) {
|
ath6kl_wmi_set_apsd_bfrd_traf(ar->wmi,
|
vif->fw_vif_idx,
|
conn->aid, 1, 0);
|
}
|
*flags |= WMI_DATA_HDR_FLAGS_UAPSD;
|
|
return true;
|
}
|
|
static bool ath6kl_process_psq(struct ath6kl_sta *conn,
|
struct ath6kl_vif *vif,
|
struct sk_buff *skb,
|
u32 *flags)
|
{
|
bool is_psq_empty = false;
|
struct ath6kl *ar = vif->ar;
|
|
if (conn->sta_flags & STA_PS_POLLED) {
|
spin_lock_bh(&conn->psq_lock);
|
if (!skb_queue_empty(&conn->psq))
|
*flags |= WMI_DATA_HDR_FLAGS_MORE;
|
spin_unlock_bh(&conn->psq_lock);
|
return false;
|
}
|
|
/* Queue the frames if the STA is sleeping */
|
spin_lock_bh(&conn->psq_lock);
|
is_psq_empty = skb_queue_empty(&conn->psq);
|
skb_queue_tail(&conn->psq, skb);
|
spin_unlock_bh(&conn->psq_lock);
|
|
/*
|
* If this is the first pkt getting queued
|
* for this STA, update the PVB for this
|
* STA.
|
*/
|
if (is_psq_empty)
|
ath6kl_wmi_set_pvb_cmd(ar->wmi,
|
vif->fw_vif_idx,
|
conn->aid, 1);
|
return true;
|
}
|
|
static bool ath6kl_powersave_ap(struct ath6kl_vif *vif, struct sk_buff *skb,
|
u32 *flags)
|
{
|
struct ethhdr *datap = (struct ethhdr *) skb->data;
|
struct ath6kl_sta *conn = NULL;
|
bool ps_queued = false;
|
struct ath6kl *ar = vif->ar;
|
|
if (is_multicast_ether_addr(datap->h_dest)) {
|
u8 ctr = 0;
|
bool q_mcast = false;
|
|
for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) {
|
if (ar->sta_list[ctr].sta_flags & STA_PS_SLEEP) {
|
q_mcast = true;
|
break;
|
}
|
}
|
|
if (q_mcast) {
|
/*
|
* If this transmit is not because of a Dtim Expiry
|
* q it.
|
*/
|
if (!test_bit(DTIM_EXPIRED, &vif->flags)) {
|
bool is_mcastq_empty = false;
|
|
spin_lock_bh(&ar->mcastpsq_lock);
|
is_mcastq_empty =
|
skb_queue_empty(&ar->mcastpsq);
|
skb_queue_tail(&ar->mcastpsq, skb);
|
spin_unlock_bh(&ar->mcastpsq_lock);
|
|
/*
|
* If this is the first Mcast pkt getting
|
* queued indicate to the target to set the
|
* BitmapControl LSB of the TIM IE.
|
*/
|
if (is_mcastq_empty)
|
ath6kl_wmi_set_pvb_cmd(ar->wmi,
|
vif->fw_vif_idx,
|
MCAST_AID, 1);
|
|
ps_queued = true;
|
} else {
|
/*
|
* This transmit is because of Dtim expiry.
|
* Determine if MoreData bit has to be set.
|
*/
|
spin_lock_bh(&ar->mcastpsq_lock);
|
if (!skb_queue_empty(&ar->mcastpsq))
|
*flags |= WMI_DATA_HDR_FLAGS_MORE;
|
spin_unlock_bh(&ar->mcastpsq_lock);
|
}
|
}
|
} else {
|
conn = ath6kl_find_sta(vif, datap->h_dest);
|
if (!conn) {
|
dev_kfree_skb(skb);
|
|
/* Inform the caller that the skb is consumed */
|
return true;
|
}
|
|
if (conn->sta_flags & STA_PS_SLEEP) {
|
ps_queued = ath6kl_process_uapsdq(conn,
|
vif, skb, flags);
|
if (!(*flags & WMI_DATA_HDR_FLAGS_UAPSD))
|
ps_queued = ath6kl_process_psq(conn,
|
vif, skb, flags);
|
}
|
}
|
return ps_queued;
|
}
|
|
/* Tx functions */
|
|
int ath6kl_control_tx(void *devt, struct sk_buff *skb,
|
enum htc_endpoint_id eid)
|
{
|
struct ath6kl *ar = devt;
|
int status = 0;
|
struct ath6kl_cookie *cookie = NULL;
|
|
trace_ath6kl_wmi_cmd(skb->data, skb->len);
|
|
if (WARN_ON_ONCE(ar->state == ATH6KL_STATE_WOW)) {
|
dev_kfree_skb(skb);
|
return -EACCES;
|
}
|
|
if (WARN_ON_ONCE(eid == ENDPOINT_UNUSED ||
|
eid >= ENDPOINT_MAX)) {
|
status = -EINVAL;
|
goto fail_ctrl_tx;
|
}
|
|
spin_lock_bh(&ar->lock);
|
|
ath6kl_dbg(ATH6KL_DBG_WLAN_TX,
|
"%s: skb=0x%p, len=0x%x eid =%d\n", __func__,
|
skb, skb->len, eid);
|
|
if (test_bit(WMI_CTRL_EP_FULL, &ar->flag) && (eid == ar->ctrl_ep)) {
|
/*
|
* Control endpoint is full, don't allocate resources, we
|
* are just going to drop this packet.
|
*/
|
cookie = NULL;
|
ath6kl_err("wmi ctrl ep full, dropping pkt : 0x%p, len:%d\n",
|
skb, skb->len);
|
} else {
|
cookie = ath6kl_alloc_cookie(ar);
|
}
|
|
if (cookie == NULL) {
|
spin_unlock_bh(&ar->lock);
|
status = -ENOMEM;
|
goto fail_ctrl_tx;
|
}
|
|
ar->tx_pending[eid]++;
|
|
if (eid != ar->ctrl_ep)
|
ar->total_tx_data_pend++;
|
|
spin_unlock_bh(&ar->lock);
|
|
cookie->skb = skb;
|
cookie->map_no = 0;
|
set_htc_pkt_info(&cookie->htc_pkt, cookie, skb->data, skb->len,
|
eid, ATH6KL_CONTROL_PKT_TAG);
|
cookie->htc_pkt.skb = skb;
|
|
/*
|
* This interface is asynchronous, if there is an error, cleanup
|
* will happen in the TX completion callback.
|
*/
|
ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt);
|
|
return 0;
|
|
fail_ctrl_tx:
|
dev_kfree_skb(skb);
|
return status;
|
}
|
|
netdev_tx_t ath6kl_data_tx(struct sk_buff *skb, struct net_device *dev)
|
{
|
struct ath6kl *ar = ath6kl_priv(dev);
|
struct ath6kl_cookie *cookie = NULL;
|
enum htc_endpoint_id eid = ENDPOINT_UNUSED;
|
struct ath6kl_vif *vif = netdev_priv(dev);
|
u32 map_no = 0;
|
u16 htc_tag = ATH6KL_DATA_PKT_TAG;
|
u8 ac = 99; /* initialize to unmapped ac */
|
bool chk_adhoc_ps_mapping = false;
|
int ret;
|
struct wmi_tx_meta_v2 meta_v2;
|
void *meta;
|
u8 csum_start = 0, csum_dest = 0, csum = skb->ip_summed;
|
u8 meta_ver = 0;
|
u32 flags = 0;
|
|
ath6kl_dbg(ATH6KL_DBG_WLAN_TX,
|
"%s: skb=0x%p, data=0x%p, len=0x%x\n", __func__,
|
skb, skb->data, skb->len);
|
|
/* If target is not associated */
|
if (!test_bit(CONNECTED, &vif->flags))
|
goto fail_tx;
|
|
if (WARN_ON_ONCE(ar->state != ATH6KL_STATE_ON))
|
goto fail_tx;
|
|
if (!test_bit(WMI_READY, &ar->flag))
|
goto fail_tx;
|
|
/* AP mode Power saving processing */
|
if (vif->nw_type == AP_NETWORK) {
|
if (ath6kl_powersave_ap(vif, skb, &flags))
|
return 0;
|
}
|
|
if (test_bit(WMI_ENABLED, &ar->flag)) {
|
if ((dev->features & NETIF_F_IP_CSUM) &&
|
(csum == CHECKSUM_PARTIAL)) {
|
csum_start = skb->csum_start -
|
(skb_network_header(skb) - skb->head) +
|
sizeof(struct ath6kl_llc_snap_hdr);
|
csum_dest = skb->csum_offset + csum_start;
|
}
|
|
if (skb_cow_head(skb, dev->needed_headroom)) {
|
dev->stats.tx_dropped++;
|
kfree_skb(skb);
|
return 0;
|
}
|
|
if (ath6kl_wmi_dix_2_dot3(ar->wmi, skb)) {
|
ath6kl_err("ath6kl_wmi_dix_2_dot3 failed\n");
|
goto fail_tx;
|
}
|
|
if ((dev->features & NETIF_F_IP_CSUM) &&
|
(csum == CHECKSUM_PARTIAL)) {
|
meta_v2.csum_start = csum_start;
|
meta_v2.csum_dest = csum_dest;
|
|
/* instruct target to calculate checksum */
|
meta_v2.csum_flags = WMI_META_V2_FLAG_CSUM_OFFLOAD;
|
meta_ver = WMI_META_VERSION_2;
|
meta = &meta_v2;
|
} else {
|
meta_ver = 0;
|
meta = NULL;
|
}
|
|
ret = ath6kl_wmi_data_hdr_add(ar->wmi, skb,
|
DATA_MSGTYPE, flags, 0,
|
meta_ver,
|
meta, vif->fw_vif_idx);
|
|
if (ret) {
|
ath6kl_warn("failed to add wmi data header:%d\n"
|
, ret);
|
goto fail_tx;
|
}
|
|
if ((vif->nw_type == ADHOC_NETWORK) &&
|
ar->ibss_ps_enable && test_bit(CONNECTED, &vif->flags))
|
chk_adhoc_ps_mapping = true;
|
else {
|
/* get the stream mapping */
|
ret = ath6kl_wmi_implicit_create_pstream(ar->wmi,
|
vif->fw_vif_idx, skb,
|
0, test_bit(WMM_ENABLED, &vif->flags), &ac);
|
if (ret)
|
goto fail_tx;
|
}
|
} else {
|
goto fail_tx;
|
}
|
|
spin_lock_bh(&ar->lock);
|
|
if (chk_adhoc_ps_mapping)
|
eid = ath6kl_ibss_map_epid(skb, dev, &map_no);
|
else
|
eid = ar->ac2ep_map[ac];
|
|
if (eid == 0 || eid == ENDPOINT_UNUSED) {
|
ath6kl_err("eid %d is not mapped!\n", eid);
|
spin_unlock_bh(&ar->lock);
|
goto fail_tx;
|
}
|
|
/* allocate resource for this packet */
|
cookie = ath6kl_alloc_cookie(ar);
|
|
if (!cookie) {
|
spin_unlock_bh(&ar->lock);
|
goto fail_tx;
|
}
|
|
/* update counts while the lock is held */
|
ar->tx_pending[eid]++;
|
ar->total_tx_data_pend++;
|
|
spin_unlock_bh(&ar->lock);
|
|
if (!IS_ALIGNED((unsigned long) skb->data - HTC_HDR_LENGTH, 4) &&
|
skb_cloned(skb)) {
|
/*
|
* We will touch (move the buffer data to align it. Since the
|
* skb buffer is cloned and not only the header is changed, we
|
* have to copy it to allow the changes. Since we are copying
|
* the data here, we may as well align it by reserving suitable
|
* headroom to avoid the memmove in ath6kl_htc_tx_buf_align().
|
*/
|
struct sk_buff *nskb;
|
|
nskb = skb_copy_expand(skb, HTC_HDR_LENGTH, 0, GFP_ATOMIC);
|
if (nskb == NULL)
|
goto fail_tx;
|
kfree_skb(skb);
|
skb = nskb;
|
}
|
|
cookie->skb = skb;
|
cookie->map_no = map_no;
|
set_htc_pkt_info(&cookie->htc_pkt, cookie, skb->data, skb->len,
|
eid, htc_tag);
|
cookie->htc_pkt.skb = skb;
|
|
ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, __func__, "tx ",
|
skb->data, skb->len);
|
|
/*
|
* HTC interface is asynchronous, if this fails, cleanup will
|
* happen in the ath6kl_tx_complete callback.
|
*/
|
ath6kl_htc_tx(ar->htc_target, &cookie->htc_pkt);
|
|
return 0;
|
|
fail_tx:
|
dev_kfree_skb(skb);
|
|
dev->stats.tx_dropped++;
|
dev->stats.tx_aborted_errors++;
|
|
return 0;
|
}
|
|
/* indicate tx activity or inactivity on a WMI stream */
|
void ath6kl_indicate_tx_activity(void *devt, u8 traffic_class, bool active)
|
{
|
struct ath6kl *ar = devt;
|
enum htc_endpoint_id eid;
|
int i;
|
|
eid = ar->ac2ep_map[traffic_class];
|
|
if (!test_bit(WMI_ENABLED, &ar->flag))
|
goto notify_htc;
|
|
spin_lock_bh(&ar->lock);
|
|
ar->ac_stream_active[traffic_class] = active;
|
|
if (active) {
|
/*
|
* Keep track of the active stream with the highest
|
* priority.
|
*/
|
if (ar->ac_stream_pri_map[traffic_class] >
|
ar->hiac_stream_active_pri)
|
/* set the new highest active priority */
|
ar->hiac_stream_active_pri =
|
ar->ac_stream_pri_map[traffic_class];
|
|
} else {
|
/*
|
* We may have to search for the next active stream
|
* that is the highest priority.
|
*/
|
if (ar->hiac_stream_active_pri ==
|
ar->ac_stream_pri_map[traffic_class]) {
|
/*
|
* The highest priority stream just went inactive
|
* reset and search for the "next" highest "active"
|
* priority stream.
|
*/
|
ar->hiac_stream_active_pri = 0;
|
|
for (i = 0; i < WMM_NUM_AC; i++) {
|
if (ar->ac_stream_active[i] &&
|
(ar->ac_stream_pri_map[i] >
|
ar->hiac_stream_active_pri))
|
/*
|
* Set the new highest active
|
* priority.
|
*/
|
ar->hiac_stream_active_pri =
|
ar->ac_stream_pri_map[i];
|
}
|
}
|
}
|
|
spin_unlock_bh(&ar->lock);
|
|
notify_htc:
|
/* notify HTC, this may cause credit distribution changes */
|
ath6kl_htc_activity_changed(ar->htc_target, eid, active);
|
}
|
|
enum htc_send_full_action ath6kl_tx_queue_full(struct htc_target *target,
|
struct htc_packet *packet)
|
{
|
struct ath6kl *ar = target->dev->ar;
|
struct ath6kl_vif *vif;
|
enum htc_endpoint_id endpoint = packet->endpoint;
|
enum htc_send_full_action action = HTC_SEND_FULL_KEEP;
|
|
if (endpoint == ar->ctrl_ep) {
|
/*
|
* Under normal WMI if this is getting full, then something
|
* is running rampant the host should not be exhausting the
|
* WMI queue with too many commands the only exception to
|
* this is during testing using endpointping.
|
*/
|
set_bit(WMI_CTRL_EP_FULL, &ar->flag);
|
ath6kl_err("wmi ctrl ep is full\n");
|
ath6kl_recovery_err_notify(ar, ATH6KL_FW_EP_FULL);
|
return action;
|
}
|
|
if (packet->info.tx.tag == ATH6KL_CONTROL_PKT_TAG)
|
return action;
|
|
/*
|
* The last MAX_HI_COOKIE_NUM "batch" of cookies are reserved for
|
* the highest active stream.
|
*/
|
if (ar->ac_stream_pri_map[ar->ep2ac_map[endpoint]] <
|
ar->hiac_stream_active_pri &&
|
ar->cookie_count <=
|
target->endpoint[endpoint].tx_drop_packet_threshold)
|
/*
|
* Give preference to the highest priority stream by
|
* dropping the packets which overflowed.
|
*/
|
action = HTC_SEND_FULL_DROP;
|
|
/* FIXME: Locking */
|
spin_lock_bh(&ar->list_lock);
|
list_for_each_entry(vif, &ar->vif_list, list) {
|
if (vif->nw_type == ADHOC_NETWORK ||
|
action != HTC_SEND_FULL_DROP) {
|
spin_unlock_bh(&ar->list_lock);
|
|
set_bit(NETQ_STOPPED, &vif->flags);
|
netif_stop_queue(vif->ndev);
|
|
return action;
|
}
|
}
|
spin_unlock_bh(&ar->list_lock);
|
|
return action;
|
}
|
|
/* TODO this needs to be looked at */
|
static void ath6kl_tx_clear_node_map(struct ath6kl_vif *vif,
|
enum htc_endpoint_id eid, u32 map_no)
|
{
|
struct ath6kl *ar = vif->ar;
|
u32 i;
|
|
if (vif->nw_type != ADHOC_NETWORK)
|
return;
|
|
if (!ar->ibss_ps_enable)
|
return;
|
|
if (eid == ar->ctrl_ep)
|
return;
|
|
if (map_no == 0)
|
return;
|
|
map_no--;
|
ar->node_map[map_no].tx_pend--;
|
|
if (ar->node_map[map_no].tx_pend)
|
return;
|
|
if (map_no != (ar->node_num - 1))
|
return;
|
|
for (i = ar->node_num; i > 0; i--) {
|
if (ar->node_map[i - 1].tx_pend)
|
break;
|
|
memset(&ar->node_map[i - 1], 0,
|
sizeof(struct ath6kl_node_mapping));
|
ar->node_num--;
|
}
|
}
|
|
void ath6kl_tx_complete(struct htc_target *target,
|
struct list_head *packet_queue)
|
{
|
struct ath6kl *ar = target->dev->ar;
|
struct sk_buff_head skb_queue;
|
struct htc_packet *packet;
|
struct sk_buff *skb;
|
struct ath6kl_cookie *ath6kl_cookie;
|
u32 map_no = 0;
|
int status;
|
enum htc_endpoint_id eid;
|
bool wake_event = false;
|
bool flushing[ATH6KL_VIF_MAX] = {false};
|
u8 if_idx;
|
struct ath6kl_vif *vif;
|
|
skb_queue_head_init(&skb_queue);
|
|
/* lock the driver as we update internal state */
|
spin_lock_bh(&ar->lock);
|
|
/* reap completed packets */
|
while (!list_empty(packet_queue)) {
|
packet = list_first_entry(packet_queue, struct htc_packet,
|
list);
|
list_del(&packet->list);
|
|
if (WARN_ON_ONCE(packet->endpoint == ENDPOINT_UNUSED ||
|
packet->endpoint >= ENDPOINT_MAX))
|
continue;
|
|
ath6kl_cookie = (struct ath6kl_cookie *)packet->pkt_cntxt;
|
if (WARN_ON_ONCE(!ath6kl_cookie))
|
continue;
|
|
status = packet->status;
|
skb = ath6kl_cookie->skb;
|
eid = packet->endpoint;
|
map_no = ath6kl_cookie->map_no;
|
|
if (WARN_ON_ONCE(!skb || !skb->data)) {
|
dev_kfree_skb(skb);
|
ath6kl_free_cookie(ar, ath6kl_cookie);
|
continue;
|
}
|
|
__skb_queue_tail(&skb_queue, skb);
|
|
if (WARN_ON_ONCE(!status && (packet->act_len != skb->len))) {
|
ath6kl_free_cookie(ar, ath6kl_cookie);
|
continue;
|
}
|
|
ar->tx_pending[eid]--;
|
|
if (eid != ar->ctrl_ep)
|
ar->total_tx_data_pend--;
|
|
if (eid == ar->ctrl_ep) {
|
if (test_bit(WMI_CTRL_EP_FULL, &ar->flag))
|
clear_bit(WMI_CTRL_EP_FULL, &ar->flag);
|
|
if (ar->tx_pending[eid] == 0)
|
wake_event = true;
|
}
|
|
if (eid == ar->ctrl_ep) {
|
if_idx = wmi_cmd_hdr_get_if_idx(
|
(struct wmi_cmd_hdr *) packet->buf);
|
} else {
|
if_idx = wmi_data_hdr_get_if_idx(
|
(struct wmi_data_hdr *) packet->buf);
|
}
|
|
vif = ath6kl_get_vif_by_index(ar, if_idx);
|
if (!vif) {
|
ath6kl_free_cookie(ar, ath6kl_cookie);
|
continue;
|
}
|
|
if (status) {
|
if (status == -ECANCELED)
|
/* a packet was flushed */
|
flushing[if_idx] = true;
|
|
vif->ndev->stats.tx_errors++;
|
|
if (status != -ENOSPC && status != -ECANCELED)
|
ath6kl_warn("tx complete error: %d\n", status);
|
|
ath6kl_dbg(ATH6KL_DBG_WLAN_TX,
|
"%s: skb=0x%p data=0x%p len=0x%x eid=%d %s\n",
|
__func__, skb, packet->buf, packet->act_len,
|
eid, "error!");
|
} else {
|
ath6kl_dbg(ATH6KL_DBG_WLAN_TX,
|
"%s: skb=0x%p data=0x%p len=0x%x eid=%d %s\n",
|
__func__, skb, packet->buf, packet->act_len,
|
eid, "OK");
|
|
flushing[if_idx] = false;
|
vif->ndev->stats.tx_packets++;
|
vif->ndev->stats.tx_bytes += skb->len;
|
}
|
|
ath6kl_tx_clear_node_map(vif, eid, map_no);
|
|
ath6kl_free_cookie(ar, ath6kl_cookie);
|
|
if (test_bit(NETQ_STOPPED, &vif->flags))
|
clear_bit(NETQ_STOPPED, &vif->flags);
|
}
|
|
spin_unlock_bh(&ar->lock);
|
|
__skb_queue_purge(&skb_queue);
|
|
/* FIXME: Locking */
|
spin_lock_bh(&ar->list_lock);
|
list_for_each_entry(vif, &ar->vif_list, list) {
|
if (test_bit(CONNECTED, &vif->flags) &&
|
!flushing[vif->fw_vif_idx]) {
|
spin_unlock_bh(&ar->list_lock);
|
netif_wake_queue(vif->ndev);
|
spin_lock_bh(&ar->list_lock);
|
}
|
}
|
spin_unlock_bh(&ar->list_lock);
|
|
if (wake_event)
|
wake_up(&ar->event_wq);
|
|
return;
|
}
|
|
void ath6kl_tx_data_cleanup(struct ath6kl *ar)
|
{
|
int i;
|
|
/* flush all the data (non-control) streams */
|
for (i = 0; i < WMM_NUM_AC; i++)
|
ath6kl_htc_flush_txep(ar->htc_target, ar->ac2ep_map[i],
|
ATH6KL_DATA_PKT_TAG);
|
}
|
|
/* Rx functions */
|
|
static void ath6kl_deliver_frames_to_nw_stack(struct net_device *dev,
|
struct sk_buff *skb)
|
{
|
if (!skb)
|
return;
|
|
skb->dev = dev;
|
|
if (!(skb->dev->flags & IFF_UP)) {
|
dev_kfree_skb(skb);
|
return;
|
}
|
|
skb->protocol = eth_type_trans(skb, skb->dev);
|
|
netif_rx_ni(skb);
|
}
|
|
static void ath6kl_alloc_netbufs(struct sk_buff_head *q, u16 num)
|
{
|
struct sk_buff *skb;
|
|
while (num) {
|
skb = ath6kl_buf_alloc(ATH6KL_BUFFER_SIZE);
|
if (!skb) {
|
ath6kl_err("netbuf allocation failed\n");
|
return;
|
}
|
skb_queue_tail(q, skb);
|
num--;
|
}
|
}
|
|
static struct sk_buff *aggr_get_free_skb(struct aggr_info *p_aggr)
|
{
|
struct sk_buff *skb = NULL;
|
|
if (skb_queue_len(&p_aggr->rx_amsdu_freeq) <
|
(AGGR_NUM_OF_FREE_NETBUFS >> 2))
|
ath6kl_alloc_netbufs(&p_aggr->rx_amsdu_freeq,
|
AGGR_NUM_OF_FREE_NETBUFS);
|
|
skb = skb_dequeue(&p_aggr->rx_amsdu_freeq);
|
|
return skb;
|
}
|
|
void ath6kl_rx_refill(struct htc_target *target, enum htc_endpoint_id endpoint)
|
{
|
struct ath6kl *ar = target->dev->ar;
|
struct sk_buff *skb;
|
int rx_buf;
|
int n_buf_refill;
|
struct htc_packet *packet;
|
struct list_head queue;
|
|
n_buf_refill = ATH6KL_MAX_RX_BUFFERS -
|
ath6kl_htc_get_rxbuf_num(ar->htc_target, endpoint);
|
|
if (n_buf_refill <= 0)
|
return;
|
|
INIT_LIST_HEAD(&queue);
|
|
ath6kl_dbg(ATH6KL_DBG_WLAN_RX,
|
"%s: providing htc with %d buffers at eid=%d\n",
|
__func__, n_buf_refill, endpoint);
|
|
for (rx_buf = 0; rx_buf < n_buf_refill; rx_buf++) {
|
skb = ath6kl_buf_alloc(ATH6KL_BUFFER_SIZE);
|
if (!skb)
|
break;
|
|
packet = (struct htc_packet *) skb->head;
|
if (!IS_ALIGNED((unsigned long) skb->data, 4)) {
|
size_t len = skb_headlen(skb);
|
skb->data = PTR_ALIGN(skb->data - 4, 4);
|
skb_set_tail_pointer(skb, len);
|
}
|
set_htc_rxpkt_info(packet, skb, skb->data,
|
ATH6KL_BUFFER_SIZE, endpoint);
|
packet->skb = skb;
|
list_add_tail(&packet->list, &queue);
|
}
|
|
if (!list_empty(&queue))
|
ath6kl_htc_add_rxbuf_multiple(ar->htc_target, &queue);
|
}
|
|
void ath6kl_refill_amsdu_rxbufs(struct ath6kl *ar, int count)
|
{
|
struct htc_packet *packet;
|
struct sk_buff *skb;
|
|
while (count) {
|
skb = ath6kl_buf_alloc(ATH6KL_AMSDU_BUFFER_SIZE);
|
if (!skb)
|
return;
|
|
packet = (struct htc_packet *) skb->head;
|
if (!IS_ALIGNED((unsigned long) skb->data, 4)) {
|
size_t len = skb_headlen(skb);
|
skb->data = PTR_ALIGN(skb->data - 4, 4);
|
skb_set_tail_pointer(skb, len);
|
}
|
set_htc_rxpkt_info(packet, skb, skb->data,
|
ATH6KL_AMSDU_BUFFER_SIZE, 0);
|
packet->skb = skb;
|
|
spin_lock_bh(&ar->lock);
|
list_add_tail(&packet->list, &ar->amsdu_rx_buffer_queue);
|
spin_unlock_bh(&ar->lock);
|
count--;
|
}
|
}
|
|
/*
|
* Callback to allocate a receive buffer for a pending packet. We use a
|
* pre-allocated list of buffers of maximum AMSDU size (4K).
|
*/
|
struct htc_packet *ath6kl_alloc_amsdu_rxbuf(struct htc_target *target,
|
enum htc_endpoint_id endpoint,
|
int len)
|
{
|
struct ath6kl *ar = target->dev->ar;
|
struct htc_packet *packet = NULL;
|
struct list_head *pkt_pos;
|
int refill_cnt = 0, depth = 0;
|
|
ath6kl_dbg(ATH6KL_DBG_WLAN_RX, "%s: eid=%d, len:%d\n",
|
__func__, endpoint, len);
|
|
if ((len <= ATH6KL_BUFFER_SIZE) ||
|
(len > ATH6KL_AMSDU_BUFFER_SIZE))
|
return NULL;
|
|
spin_lock_bh(&ar->lock);
|
|
if (list_empty(&ar->amsdu_rx_buffer_queue)) {
|
spin_unlock_bh(&ar->lock);
|
refill_cnt = ATH6KL_MAX_AMSDU_RX_BUFFERS;
|
goto refill_buf;
|
}
|
|
packet = list_first_entry(&ar->amsdu_rx_buffer_queue,
|
struct htc_packet, list);
|
list_del(&packet->list);
|
list_for_each(pkt_pos, &ar->amsdu_rx_buffer_queue)
|
depth++;
|
|
refill_cnt = ATH6KL_MAX_AMSDU_RX_BUFFERS - depth;
|
spin_unlock_bh(&ar->lock);
|
|
/* set actual endpoint ID */
|
packet->endpoint = endpoint;
|
|
refill_buf:
|
if (refill_cnt >= ATH6KL_AMSDU_REFILL_THRESHOLD)
|
ath6kl_refill_amsdu_rxbufs(ar, refill_cnt);
|
|
return packet;
|
}
|
|
static void aggr_slice_amsdu(struct aggr_info *p_aggr,
|
struct rxtid *rxtid, struct sk_buff *skb)
|
{
|
struct sk_buff *new_skb;
|
struct ethhdr *hdr;
|
u16 frame_8023_len, payload_8023_len, mac_hdr_len, amsdu_len;
|
u8 *framep;
|
|
mac_hdr_len = sizeof(struct ethhdr);
|
framep = skb->data + mac_hdr_len;
|
amsdu_len = skb->len - mac_hdr_len;
|
|
while (amsdu_len > mac_hdr_len) {
|
hdr = (struct ethhdr *) framep;
|
payload_8023_len = be16_to_cpu(hdr->h_proto);
|
|
if (payload_8023_len < MIN_MSDU_SUBFRAME_PAYLOAD_LEN ||
|
payload_8023_len > MAX_MSDU_SUBFRAME_PAYLOAD_LEN) {
|
ath6kl_err("802.3 AMSDU frame bound check failed. len %d\n",
|
payload_8023_len);
|
break;
|
}
|
|
frame_8023_len = payload_8023_len + mac_hdr_len;
|
new_skb = aggr_get_free_skb(p_aggr);
|
if (!new_skb) {
|
ath6kl_err("no buffer available\n");
|
break;
|
}
|
|
memcpy(new_skb->data, framep, frame_8023_len);
|
skb_put(new_skb, frame_8023_len);
|
if (ath6kl_wmi_dot3_2_dix(new_skb)) {
|
ath6kl_err("dot3_2_dix error\n");
|
dev_kfree_skb(new_skb);
|
break;
|
}
|
|
skb_queue_tail(&rxtid->q, new_skb);
|
|
/* Is this the last subframe within this aggregate ? */
|
if ((amsdu_len - frame_8023_len) == 0)
|
break;
|
|
/* Add the length of A-MSDU subframe padding bytes -
|
* Round to nearest word.
|
*/
|
frame_8023_len = ALIGN(frame_8023_len, 4);
|
|
framep += frame_8023_len;
|
amsdu_len -= frame_8023_len;
|
}
|
|
dev_kfree_skb(skb);
|
}
|
|
static void aggr_deque_frms(struct aggr_info_conn *agg_conn, u8 tid,
|
u16 seq_no, u8 order)
|
{
|
struct sk_buff *skb;
|
struct rxtid *rxtid;
|
struct skb_hold_q *node;
|
u16 idx, idx_end, seq_end;
|
struct rxtid_stats *stats;
|
|
rxtid = &agg_conn->rx_tid[tid];
|
stats = &agg_conn->stat[tid];
|
|
spin_lock_bh(&rxtid->lock);
|
idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz);
|
|
/*
|
* idx_end is typically the last possible frame in the window,
|
* but changes to 'the' seq_no, when BAR comes. If seq_no
|
* is non-zero, we will go up to that and stop.
|
* Note: last seq no in current window will occupy the same
|
* index position as index that is just previous to start.
|
* An imp point : if win_sz is 7, for seq_no space of 4095,
|
* then, there would be holes when sequence wrap around occurs.
|
* Target should judiciously choose the win_sz, based on
|
* this condition. For 4095, (TID_WINDOW_SZ = 2 x win_sz
|
* 2, 4, 8, 16 win_sz works fine).
|
* We must deque from "idx" to "idx_end", including both.
|
*/
|
seq_end = seq_no ? seq_no : rxtid->seq_next;
|
idx_end = AGGR_WIN_IDX(seq_end, rxtid->hold_q_sz);
|
|
do {
|
node = &rxtid->hold_q[idx];
|
if ((order == 1) && (!node->skb))
|
break;
|
|
if (node->skb) {
|
if (node->is_amsdu)
|
aggr_slice_amsdu(agg_conn->aggr_info, rxtid,
|
node->skb);
|
else
|
skb_queue_tail(&rxtid->q, node->skb);
|
node->skb = NULL;
|
} else {
|
stats->num_hole++;
|
}
|
|
rxtid->seq_next = ATH6KL_NEXT_SEQ_NO(rxtid->seq_next);
|
idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz);
|
} while (idx != idx_end);
|
|
spin_unlock_bh(&rxtid->lock);
|
|
stats->num_delivered += skb_queue_len(&rxtid->q);
|
|
while ((skb = skb_dequeue(&rxtid->q)))
|
ath6kl_deliver_frames_to_nw_stack(agg_conn->dev, skb);
|
}
|
|
static bool aggr_process_recv_frm(struct aggr_info_conn *agg_conn, u8 tid,
|
u16 seq_no,
|
bool is_amsdu, struct sk_buff *frame)
|
{
|
struct rxtid *rxtid;
|
struct rxtid_stats *stats;
|
struct sk_buff *skb;
|
struct skb_hold_q *node;
|
u16 idx, st, cur, end;
|
bool is_queued = false;
|
u16 extended_end;
|
|
rxtid = &agg_conn->rx_tid[tid];
|
stats = &agg_conn->stat[tid];
|
|
stats->num_into_aggr++;
|
|
if (!rxtid->aggr) {
|
if (is_amsdu) {
|
aggr_slice_amsdu(agg_conn->aggr_info, rxtid, frame);
|
is_queued = true;
|
stats->num_amsdu++;
|
while ((skb = skb_dequeue(&rxtid->q)))
|
ath6kl_deliver_frames_to_nw_stack(agg_conn->dev,
|
skb);
|
}
|
return is_queued;
|
}
|
|
/* Check the incoming sequence no, if it's in the window */
|
st = rxtid->seq_next;
|
cur = seq_no;
|
end = (st + rxtid->hold_q_sz-1) & ATH6KL_MAX_SEQ_NO;
|
|
if (((st < end) && (cur < st || cur > end)) ||
|
((st > end) && (cur > end) && (cur < st))) {
|
extended_end = (end + rxtid->hold_q_sz - 1) &
|
ATH6KL_MAX_SEQ_NO;
|
|
if (((end < extended_end) &&
|
(cur < end || cur > extended_end)) ||
|
((end > extended_end) && (cur > extended_end) &&
|
(cur < end))) {
|
aggr_deque_frms(agg_conn, tid, 0, 0);
|
spin_lock_bh(&rxtid->lock);
|
if (cur >= rxtid->hold_q_sz - 1)
|
rxtid->seq_next = cur - (rxtid->hold_q_sz - 1);
|
else
|
rxtid->seq_next = ATH6KL_MAX_SEQ_NO -
|
(rxtid->hold_q_sz - 2 - cur);
|
spin_unlock_bh(&rxtid->lock);
|
} else {
|
/*
|
* Dequeue only those frames that are outside the
|
* new shifted window.
|
*/
|
if (cur >= rxtid->hold_q_sz - 1)
|
st = cur - (rxtid->hold_q_sz - 1);
|
else
|
st = ATH6KL_MAX_SEQ_NO -
|
(rxtid->hold_q_sz - 2 - cur);
|
|
aggr_deque_frms(agg_conn, tid, st, 0);
|
}
|
|
stats->num_oow++;
|
}
|
|
idx = AGGR_WIN_IDX(seq_no, rxtid->hold_q_sz);
|
|
node = &rxtid->hold_q[idx];
|
|
spin_lock_bh(&rxtid->lock);
|
|
/*
|
* Is the cur frame duplicate or something beyond our window(hold_q
|
* -> which is 2x, already)?
|
*
|
* 1. Duplicate is easy - drop incoming frame.
|
* 2. Not falling in current sliding window.
|
* 2a. is the frame_seq_no preceding current tid_seq_no?
|
* -> drop the frame. perhaps sender did not get our ACK.
|
* this is taken care of above.
|
* 2b. is the frame_seq_no beyond window(st, TID_WINDOW_SZ);
|
* -> Taken care of it above, by moving window forward.
|
*/
|
dev_kfree_skb(node->skb);
|
stats->num_dups++;
|
|
node->skb = frame;
|
is_queued = true;
|
node->is_amsdu = is_amsdu;
|
node->seq_no = seq_no;
|
|
if (node->is_amsdu)
|
stats->num_amsdu++;
|
else
|
stats->num_mpdu++;
|
|
spin_unlock_bh(&rxtid->lock);
|
|
aggr_deque_frms(agg_conn, tid, 0, 1);
|
|
if (agg_conn->timer_scheduled)
|
return is_queued;
|
|
spin_lock_bh(&rxtid->lock);
|
for (idx = 0; idx < rxtid->hold_q_sz; idx++) {
|
if (rxtid->hold_q[idx].skb) {
|
/*
|
* There is a frame in the queue and no
|
* timer so start a timer to ensure that
|
* the frame doesn't remain stuck
|
* forever.
|
*/
|
agg_conn->timer_scheduled = true;
|
mod_timer(&agg_conn->timer,
|
(jiffies + (HZ * AGGR_RX_TIMEOUT) / 1000));
|
rxtid->timer_mon = true;
|
break;
|
}
|
}
|
spin_unlock_bh(&rxtid->lock);
|
|
return is_queued;
|
}
|
|
static void ath6kl_uapsd_trigger_frame_rx(struct ath6kl_vif *vif,
|
struct ath6kl_sta *conn)
|
{
|
struct ath6kl *ar = vif->ar;
|
bool is_apsdq_empty, is_apsdq_empty_at_start;
|
u32 num_frames_to_deliver, flags;
|
struct sk_buff *skb = NULL;
|
|
/*
|
* If the APSD q for this STA is not empty, dequeue and
|
* send a pkt from the head of the q. Also update the
|
* More data bit in the WMI_DATA_HDR if there are
|
* more pkts for this STA in the APSD q.
|
* If there are no more pkts for this STA,
|
* update the APSD bitmap for this STA.
|
*/
|
|
num_frames_to_deliver = (conn->apsd_info >> ATH6KL_APSD_NUM_OF_AC) &
|
ATH6KL_APSD_FRAME_MASK;
|
/*
|
* Number of frames to send in a service period is
|
* indicated by the station
|
* in the QOS_INFO of the association request
|
* If it is zero, send all frames
|
*/
|
if (!num_frames_to_deliver)
|
num_frames_to_deliver = ATH6KL_APSD_ALL_FRAME;
|
|
spin_lock_bh(&conn->psq_lock);
|
is_apsdq_empty = skb_queue_empty(&conn->apsdq);
|
spin_unlock_bh(&conn->psq_lock);
|
is_apsdq_empty_at_start = is_apsdq_empty;
|
|
while ((!is_apsdq_empty) && (num_frames_to_deliver)) {
|
spin_lock_bh(&conn->psq_lock);
|
skb = skb_dequeue(&conn->apsdq);
|
is_apsdq_empty = skb_queue_empty(&conn->apsdq);
|
spin_unlock_bh(&conn->psq_lock);
|
|
/*
|
* Set the STA flag to Trigger delivery,
|
* so that the frame will go out
|
*/
|
conn->sta_flags |= STA_PS_APSD_TRIGGER;
|
num_frames_to_deliver--;
|
|
/* Last frame in the service period, set EOSP or queue empty */
|
if ((is_apsdq_empty) || (!num_frames_to_deliver))
|
conn->sta_flags |= STA_PS_APSD_EOSP;
|
|
ath6kl_data_tx(skb, vif->ndev);
|
conn->sta_flags &= ~(STA_PS_APSD_TRIGGER);
|
conn->sta_flags &= ~(STA_PS_APSD_EOSP);
|
}
|
|
if (is_apsdq_empty) {
|
if (is_apsdq_empty_at_start)
|
flags = WMI_AP_APSD_NO_DELIVERY_FRAMES;
|
else
|
flags = 0;
|
|
ath6kl_wmi_set_apsd_bfrd_traf(ar->wmi,
|
vif->fw_vif_idx,
|
conn->aid, 0, flags);
|
}
|
|
return;
|
}
|
|
void ath6kl_rx(struct htc_target *target, struct htc_packet *packet)
|
{
|
struct ath6kl *ar = target->dev->ar;
|
struct sk_buff *skb = packet->pkt_cntxt;
|
struct wmi_rx_meta_v2 *meta;
|
struct wmi_data_hdr *dhdr;
|
int min_hdr_len;
|
u8 meta_type, dot11_hdr = 0;
|
u8 pad_before_data_start;
|
int status = packet->status;
|
enum htc_endpoint_id ept = packet->endpoint;
|
bool is_amsdu, prev_ps, ps_state = false;
|
bool trig_state = false;
|
struct ath6kl_sta *conn = NULL;
|
struct sk_buff *skb1 = NULL;
|
struct ethhdr *datap = NULL;
|
struct ath6kl_vif *vif;
|
struct aggr_info_conn *aggr_conn;
|
u16 seq_no, offset;
|
u8 tid, if_idx;
|
|
ath6kl_dbg(ATH6KL_DBG_WLAN_RX,
|
"%s: ar=0x%p eid=%d, skb=0x%p, data=0x%p, len=0x%x status:%d",
|
__func__, ar, ept, skb, packet->buf,
|
packet->act_len, status);
|
|
if (status || packet->act_len < HTC_HDR_LENGTH) {
|
dev_kfree_skb(skb);
|
return;
|
}
|
|
skb_put(skb, packet->act_len + HTC_HDR_LENGTH);
|
skb_pull(skb, HTC_HDR_LENGTH);
|
|
ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, __func__, "rx ",
|
skb->data, skb->len);
|
|
if (ept == ar->ctrl_ep) {
|
if (test_bit(WMI_ENABLED, &ar->flag)) {
|
ath6kl_check_wow_status(ar);
|
ath6kl_wmi_control_rx(ar->wmi, skb);
|
return;
|
}
|
if_idx =
|
wmi_cmd_hdr_get_if_idx((struct wmi_cmd_hdr *) skb->data);
|
} else {
|
if_idx =
|
wmi_data_hdr_get_if_idx((struct wmi_data_hdr *) skb->data);
|
}
|
|
vif = ath6kl_get_vif_by_index(ar, if_idx);
|
if (!vif) {
|
dev_kfree_skb(skb);
|
return;
|
}
|
|
/*
|
* Take lock to protect buffer counts and adaptive power throughput
|
* state.
|
*/
|
spin_lock_bh(&vif->if_lock);
|
|
vif->ndev->stats.rx_packets++;
|
vif->ndev->stats.rx_bytes += packet->act_len;
|
|
spin_unlock_bh(&vif->if_lock);
|
|
skb->dev = vif->ndev;
|
|
if (!test_bit(WMI_ENABLED, &ar->flag)) {
|
if (EPPING_ALIGNMENT_PAD > 0)
|
skb_pull(skb, EPPING_ALIGNMENT_PAD);
|
ath6kl_deliver_frames_to_nw_stack(vif->ndev, skb);
|
return;
|
}
|
|
ath6kl_check_wow_status(ar);
|
|
min_hdr_len = sizeof(struct ethhdr) + sizeof(struct wmi_data_hdr) +
|
sizeof(struct ath6kl_llc_snap_hdr);
|
|
dhdr = (struct wmi_data_hdr *) skb->data;
|
|
/*
|
* In the case of AP mode we may receive NULL data frames
|
* that do not have LLC hdr. They are 16 bytes in size.
|
* Allow these frames in the AP mode.
|
*/
|
if (vif->nw_type != AP_NETWORK &&
|
((packet->act_len < min_hdr_len) ||
|
(packet->act_len > WMI_MAX_AMSDU_RX_DATA_FRAME_LENGTH))) {
|
ath6kl_info("frame len is too short or too long\n");
|
vif->ndev->stats.rx_errors++;
|
vif->ndev->stats.rx_length_errors++;
|
dev_kfree_skb(skb);
|
return;
|
}
|
|
pad_before_data_start =
|
(le16_to_cpu(dhdr->info3) >> WMI_DATA_HDR_PAD_BEFORE_DATA_SHIFT)
|
& WMI_DATA_HDR_PAD_BEFORE_DATA_MASK;
|
|
/* Get the Power save state of the STA */
|
if (vif->nw_type == AP_NETWORK) {
|
meta_type = wmi_data_hdr_get_meta(dhdr);
|
|
ps_state = !!((dhdr->info >> WMI_DATA_HDR_PS_SHIFT) &
|
WMI_DATA_HDR_PS_MASK);
|
|
offset = sizeof(struct wmi_data_hdr) + pad_before_data_start;
|
trig_state = !!(le16_to_cpu(dhdr->info3) & WMI_DATA_HDR_TRIG);
|
|
switch (meta_type) {
|
case 0:
|
break;
|
case WMI_META_VERSION_1:
|
offset += sizeof(struct wmi_rx_meta_v1);
|
break;
|
case WMI_META_VERSION_2:
|
offset += sizeof(struct wmi_rx_meta_v2);
|
break;
|
default:
|
break;
|
}
|
|
datap = (struct ethhdr *) (skb->data + offset);
|
conn = ath6kl_find_sta(vif, datap->h_source);
|
|
if (!conn) {
|
dev_kfree_skb(skb);
|
return;
|
}
|
|
/*
|
* If there is a change in PS state of the STA,
|
* take appropriate steps:
|
*
|
* 1. If Sleep-->Awake, flush the psq for the STA
|
* Clear the PVB for the STA.
|
* 2. If Awake-->Sleep, Starting queueing frames
|
* the STA.
|
*/
|
prev_ps = !!(conn->sta_flags & STA_PS_SLEEP);
|
|
if (ps_state)
|
conn->sta_flags |= STA_PS_SLEEP;
|
else
|
conn->sta_flags &= ~STA_PS_SLEEP;
|
|
/* Accept trigger only when the station is in sleep */
|
if ((conn->sta_flags & STA_PS_SLEEP) && trig_state)
|
ath6kl_uapsd_trigger_frame_rx(vif, conn);
|
|
if (prev_ps ^ !!(conn->sta_flags & STA_PS_SLEEP)) {
|
if (!(conn->sta_flags & STA_PS_SLEEP)) {
|
struct sk_buff *skbuff = NULL;
|
bool is_apsdq_empty;
|
struct ath6kl_mgmt_buff *mgmt;
|
u8 idx;
|
|
spin_lock_bh(&conn->psq_lock);
|
while (conn->mgmt_psq_len > 0) {
|
mgmt = list_first_entry(
|
&conn->mgmt_psq,
|
struct ath6kl_mgmt_buff,
|
list);
|
list_del(&mgmt->list);
|
conn->mgmt_psq_len--;
|
spin_unlock_bh(&conn->psq_lock);
|
idx = vif->fw_vif_idx;
|
|
ath6kl_wmi_send_mgmt_cmd(ar->wmi,
|
idx,
|
mgmt->id,
|
mgmt->freq,
|
mgmt->wait,
|
mgmt->buf,
|
mgmt->len,
|
mgmt->no_cck);
|
|
kfree(mgmt);
|
spin_lock_bh(&conn->psq_lock);
|
}
|
conn->mgmt_psq_len = 0;
|
while ((skbuff = skb_dequeue(&conn->psq))) {
|
spin_unlock_bh(&conn->psq_lock);
|
ath6kl_data_tx(skbuff, vif->ndev);
|
spin_lock_bh(&conn->psq_lock);
|
}
|
|
is_apsdq_empty = skb_queue_empty(&conn->apsdq);
|
while ((skbuff = skb_dequeue(&conn->apsdq))) {
|
spin_unlock_bh(&conn->psq_lock);
|
ath6kl_data_tx(skbuff, vif->ndev);
|
spin_lock_bh(&conn->psq_lock);
|
}
|
spin_unlock_bh(&conn->psq_lock);
|
|
if (!is_apsdq_empty)
|
ath6kl_wmi_set_apsd_bfrd_traf(
|
ar->wmi,
|
vif->fw_vif_idx,
|
conn->aid, 0, 0);
|
|
/* Clear the PVB for this STA */
|
ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx,
|
conn->aid, 0);
|
}
|
}
|
|
/* drop NULL data frames here */
|
if ((packet->act_len < min_hdr_len) ||
|
(packet->act_len >
|
WMI_MAX_AMSDU_RX_DATA_FRAME_LENGTH)) {
|
dev_kfree_skb(skb);
|
return;
|
}
|
}
|
|
is_amsdu = wmi_data_hdr_is_amsdu(dhdr) ? true : false;
|
tid = wmi_data_hdr_get_up(dhdr);
|
seq_no = wmi_data_hdr_get_seqno(dhdr);
|
meta_type = wmi_data_hdr_get_meta(dhdr);
|
dot11_hdr = wmi_data_hdr_get_dot11(dhdr);
|
|
skb_pull(skb, sizeof(struct wmi_data_hdr));
|
|
switch (meta_type) {
|
case WMI_META_VERSION_1:
|
skb_pull(skb, sizeof(struct wmi_rx_meta_v1));
|
break;
|
case WMI_META_VERSION_2:
|
meta = (struct wmi_rx_meta_v2 *) skb->data;
|
if (meta->csum_flags & 0x1) {
|
skb->ip_summed = CHECKSUM_COMPLETE;
|
skb->csum = (__force __wsum) meta->csum;
|
}
|
skb_pull(skb, sizeof(struct wmi_rx_meta_v2));
|
break;
|
default:
|
break;
|
}
|
|
skb_pull(skb, pad_before_data_start);
|
|
if (dot11_hdr)
|
status = ath6kl_wmi_dot11_hdr_remove(ar->wmi, skb);
|
else if (!is_amsdu)
|
status = ath6kl_wmi_dot3_2_dix(skb);
|
|
if (status) {
|
/*
|
* Drop frames that could not be processed (lack of
|
* memory, etc.)
|
*/
|
dev_kfree_skb(skb);
|
return;
|
}
|
|
if (!(vif->ndev->flags & IFF_UP)) {
|
dev_kfree_skb(skb);
|
return;
|
}
|
|
if (vif->nw_type == AP_NETWORK) {
|
datap = (struct ethhdr *) skb->data;
|
if (is_multicast_ether_addr(datap->h_dest))
|
/*
|
* Bcast/Mcast frames should be sent to the
|
* OS stack as well as on the air.
|
*/
|
skb1 = skb_copy(skb, GFP_ATOMIC);
|
else {
|
/*
|
* Search for a connected STA with dstMac
|
* as the Mac address. If found send the
|
* frame to it on the air else send the
|
* frame up the stack.
|
*/
|
conn = ath6kl_find_sta(vif, datap->h_dest);
|
|
if (conn && ar->intra_bss) {
|
skb1 = skb;
|
skb = NULL;
|
} else if (conn && !ar->intra_bss) {
|
dev_kfree_skb(skb);
|
skb = NULL;
|
}
|
}
|
if (skb1)
|
ath6kl_data_tx(skb1, vif->ndev);
|
|
if (skb == NULL) {
|
/* nothing to deliver up the stack */
|
return;
|
}
|
}
|
|
datap = (struct ethhdr *) skb->data;
|
|
if (is_unicast_ether_addr(datap->h_dest)) {
|
if (vif->nw_type == AP_NETWORK) {
|
conn = ath6kl_find_sta(vif, datap->h_source);
|
if (!conn)
|
return;
|
aggr_conn = conn->aggr_conn;
|
} else {
|
aggr_conn = vif->aggr_cntxt->aggr_conn;
|
}
|
|
if (aggr_process_recv_frm(aggr_conn, tid, seq_no,
|
is_amsdu, skb)) {
|
/* aggregation code will handle the skb */
|
return;
|
}
|
} else if (!is_broadcast_ether_addr(datap->h_dest)) {
|
vif->ndev->stats.multicast++;
|
}
|
|
ath6kl_deliver_frames_to_nw_stack(vif->ndev, skb);
|
}
|
|
static void aggr_timeout(struct timer_list *t)
|
{
|
u8 i, j;
|
struct aggr_info_conn *aggr_conn = from_timer(aggr_conn, t, timer);
|
struct rxtid *rxtid;
|
struct rxtid_stats *stats;
|
|
for (i = 0; i < NUM_OF_TIDS; i++) {
|
rxtid = &aggr_conn->rx_tid[i];
|
stats = &aggr_conn->stat[i];
|
|
if (!rxtid->aggr || !rxtid->timer_mon)
|
continue;
|
|
stats->num_timeouts++;
|
ath6kl_dbg(ATH6KL_DBG_AGGR,
|
"aggr timeout (st %d end %d)\n",
|
rxtid->seq_next,
|
((rxtid->seq_next + rxtid->hold_q_sz-1) &
|
ATH6KL_MAX_SEQ_NO));
|
aggr_deque_frms(aggr_conn, i, 0, 0);
|
}
|
|
aggr_conn->timer_scheduled = false;
|
|
for (i = 0; i < NUM_OF_TIDS; i++) {
|
rxtid = &aggr_conn->rx_tid[i];
|
|
if (rxtid->aggr && rxtid->hold_q) {
|
spin_lock_bh(&rxtid->lock);
|
for (j = 0; j < rxtid->hold_q_sz; j++) {
|
if (rxtid->hold_q[j].skb) {
|
aggr_conn->timer_scheduled = true;
|
rxtid->timer_mon = true;
|
break;
|
}
|
}
|
spin_unlock_bh(&rxtid->lock);
|
|
if (j >= rxtid->hold_q_sz)
|
rxtid->timer_mon = false;
|
}
|
}
|
|
if (aggr_conn->timer_scheduled)
|
mod_timer(&aggr_conn->timer,
|
jiffies + msecs_to_jiffies(AGGR_RX_TIMEOUT));
|
}
|
|
static void aggr_delete_tid_state(struct aggr_info_conn *aggr_conn, u8 tid)
|
{
|
struct rxtid *rxtid;
|
struct rxtid_stats *stats;
|
|
if (!aggr_conn || tid >= NUM_OF_TIDS)
|
return;
|
|
rxtid = &aggr_conn->rx_tid[tid];
|
stats = &aggr_conn->stat[tid];
|
|
if (rxtid->aggr)
|
aggr_deque_frms(aggr_conn, tid, 0, 0);
|
|
rxtid->aggr = false;
|
rxtid->timer_mon = false;
|
rxtid->win_sz = 0;
|
rxtid->seq_next = 0;
|
rxtid->hold_q_sz = 0;
|
|
kfree(rxtid->hold_q);
|
rxtid->hold_q = NULL;
|
|
memset(stats, 0, sizeof(struct rxtid_stats));
|
}
|
|
void aggr_recv_addba_req_evt(struct ath6kl_vif *vif, u8 tid_mux, u16 seq_no,
|
u8 win_sz)
|
{
|
struct ath6kl_sta *sta;
|
struct aggr_info_conn *aggr_conn = NULL;
|
struct rxtid *rxtid;
|
u16 hold_q_size;
|
u8 tid, aid;
|
|
if (vif->nw_type == AP_NETWORK) {
|
aid = ath6kl_get_aid(tid_mux);
|
sta = ath6kl_find_sta_by_aid(vif->ar, aid);
|
if (sta)
|
aggr_conn = sta->aggr_conn;
|
} else {
|
aggr_conn = vif->aggr_cntxt->aggr_conn;
|
}
|
|
if (!aggr_conn)
|
return;
|
|
tid = ath6kl_get_tid(tid_mux);
|
if (tid >= NUM_OF_TIDS)
|
return;
|
|
rxtid = &aggr_conn->rx_tid[tid];
|
|
if (win_sz < AGGR_WIN_SZ_MIN || win_sz > AGGR_WIN_SZ_MAX)
|
ath6kl_dbg(ATH6KL_DBG_WLAN_RX, "%s: win_sz %d, tid %d\n",
|
__func__, win_sz, tid);
|
|
if (rxtid->aggr)
|
aggr_delete_tid_state(aggr_conn, tid);
|
|
rxtid->seq_next = seq_no;
|
hold_q_size = TID_WINDOW_SZ(win_sz) * sizeof(struct skb_hold_q);
|
rxtid->hold_q = kzalloc(hold_q_size, GFP_KERNEL);
|
if (!rxtid->hold_q)
|
return;
|
|
rxtid->win_sz = win_sz;
|
rxtid->hold_q_sz = TID_WINDOW_SZ(win_sz);
|
if (!skb_queue_empty(&rxtid->q))
|
return;
|
|
rxtid->aggr = true;
|
}
|
|
void aggr_conn_init(struct ath6kl_vif *vif, struct aggr_info *aggr_info,
|
struct aggr_info_conn *aggr_conn)
|
{
|
struct rxtid *rxtid;
|
u8 i;
|
|
aggr_conn->aggr_sz = AGGR_SZ_DEFAULT;
|
aggr_conn->dev = vif->ndev;
|
timer_setup(&aggr_conn->timer, aggr_timeout, 0);
|
aggr_conn->aggr_info = aggr_info;
|
|
aggr_conn->timer_scheduled = false;
|
|
for (i = 0; i < NUM_OF_TIDS; i++) {
|
rxtid = &aggr_conn->rx_tid[i];
|
rxtid->aggr = false;
|
rxtid->timer_mon = false;
|
skb_queue_head_init(&rxtid->q);
|
spin_lock_init(&rxtid->lock);
|
}
|
}
|
|
struct aggr_info *aggr_init(struct ath6kl_vif *vif)
|
{
|
struct aggr_info *p_aggr = NULL;
|
|
p_aggr = kzalloc(sizeof(struct aggr_info), GFP_KERNEL);
|
if (!p_aggr) {
|
ath6kl_err("failed to alloc memory for aggr_node\n");
|
return NULL;
|
}
|
|
p_aggr->aggr_conn = kzalloc(sizeof(struct aggr_info_conn), GFP_KERNEL);
|
if (!p_aggr->aggr_conn) {
|
ath6kl_err("failed to alloc memory for connection specific aggr info\n");
|
kfree(p_aggr);
|
return NULL;
|
}
|
|
aggr_conn_init(vif, p_aggr, p_aggr->aggr_conn);
|
|
skb_queue_head_init(&p_aggr->rx_amsdu_freeq);
|
ath6kl_alloc_netbufs(&p_aggr->rx_amsdu_freeq, AGGR_NUM_OF_FREE_NETBUFS);
|
|
return p_aggr;
|
}
|
|
void aggr_recv_delba_req_evt(struct ath6kl_vif *vif, u8 tid_mux)
|
{
|
struct ath6kl_sta *sta;
|
struct rxtid *rxtid;
|
struct aggr_info_conn *aggr_conn = NULL;
|
u8 tid, aid;
|
|
if (vif->nw_type == AP_NETWORK) {
|
aid = ath6kl_get_aid(tid_mux);
|
sta = ath6kl_find_sta_by_aid(vif->ar, aid);
|
if (sta)
|
aggr_conn = sta->aggr_conn;
|
} else {
|
aggr_conn = vif->aggr_cntxt->aggr_conn;
|
}
|
|
if (!aggr_conn)
|
return;
|
|
tid = ath6kl_get_tid(tid_mux);
|
if (tid >= NUM_OF_TIDS)
|
return;
|
|
rxtid = &aggr_conn->rx_tid[tid];
|
|
if (rxtid->aggr)
|
aggr_delete_tid_state(aggr_conn, tid);
|
}
|
|
void aggr_reset_state(struct aggr_info_conn *aggr_conn)
|
{
|
u8 tid;
|
|
if (!aggr_conn)
|
return;
|
|
if (aggr_conn->timer_scheduled) {
|
del_timer(&aggr_conn->timer);
|
aggr_conn->timer_scheduled = false;
|
}
|
|
for (tid = 0; tid < NUM_OF_TIDS; tid++)
|
aggr_delete_tid_state(aggr_conn, tid);
|
}
|
|
/* clean up our amsdu buffer list */
|
void ath6kl_cleanup_amsdu_rxbufs(struct ath6kl *ar)
|
{
|
struct htc_packet *packet, *tmp_pkt;
|
|
spin_lock_bh(&ar->lock);
|
if (list_empty(&ar->amsdu_rx_buffer_queue)) {
|
spin_unlock_bh(&ar->lock);
|
return;
|
}
|
|
list_for_each_entry_safe(packet, tmp_pkt, &ar->amsdu_rx_buffer_queue,
|
list) {
|
list_del(&packet->list);
|
spin_unlock_bh(&ar->lock);
|
dev_kfree_skb(packet->pkt_cntxt);
|
spin_lock_bh(&ar->lock);
|
}
|
|
spin_unlock_bh(&ar->lock);
|
}
|
|
void aggr_module_destroy(struct aggr_info *aggr_info)
|
{
|
if (!aggr_info)
|
return;
|
|
aggr_reset_state(aggr_info->aggr_conn);
|
skb_queue_purge(&aggr_info->rx_amsdu_freeq);
|
kfree(aggr_info->aggr_conn);
|
kfree(aggr_info);
|
}
|
