/*
* This function sends a packet to device.
*
* It processes the packet to add the TxPD, checks condition and
* sends the processed packet to firmware for transmission.
*
* On successful completion, the function calls the completion callback
* and logs the time.
*/
int mwifiex_process_tx(struct mwifiex_private *priv, struct sk_buff *skb,
struct mwifiex_tx_param *tx_param)
{
int ret = -1;
struct mwifiex_adapter *adapter = priv->adapter;
u8 *head_ptr;
struct txpd *local_tx_pd = NULL;
head_ptr = (u8 *) mwifiex_process_sta_txpd(priv, skb);
if (head_ptr) {
if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA)
local_tx_pd =
(struct txpd *) (head_ptr + INTF_HEADER_LEN);
ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
skb->data, skb->len, tx_param);
}
switch (ret) {
case -EBUSY:
if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) &&
(adapter->pps_uapsd_mode) &&
(adapter->tx_lock_flag)) {
priv->adapter->tx_lock_flag = false;
local_tx_pd->flags = 0;
}
dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
break;
case -1:
adapter->data_sent = false;
dev_err(adapter->dev, "mwifiex_write_data_async failed: 0x%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;
break;
case 0:
mwifiex_write_data_complete(adapter, skb, ret);
break;
default:
break;
}
return ret;
}
static void mwifiex_usb_cleanup_tx_aggr(struct mwifiex_adapter *adapter)
{
struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
struct usb_tx_data_port *port;
struct sk_buff *skb_tmp;
int idx;
for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
port = &card->port[idx];
if (adapter->bus_aggr.enable)
while ((skb_tmp =
skb_dequeue(&port->tx_aggr.aggr_list)))
mwifiex_write_data_complete(adapter, skb_tmp,
0, -1);
del_timer_sync(&port->tx_aggr.timer_cnxt.hold_timer);
port->tx_aggr.timer_cnxt.is_hold_timer_set = false;
port->tx_aggr.timer_cnxt.hold_tmo_msecs = 0;
}
}
static void mwifiex_usb_tx_aggr_tmo(struct timer_list *t)
{
struct urb_context *urb_cnxt = NULL;
struct sk_buff *skb_send = NULL;
struct tx_aggr_tmr_cnxt *timer_context =
from_timer(timer_context, t, hold_timer);
struct mwifiex_adapter *adapter = timer_context->adapter;
struct usb_tx_data_port *port = timer_context->port;
unsigned long flags;
int err = 0;
spin_lock_irqsave(&port->tx_aggr_lock, flags);
err = mwifiex_usb_prepare_tx_aggr_skb(adapter, port, &skb_send);
if (err) {
mwifiex_dbg(adapter, ERROR,
"prepare tx aggr skb failed, err=%d\n", err);
goto unlock;
}
if (atomic_read(&port->tx_data_urb_pending) >=
MWIFIEX_TX_DATA_URB) {
port->block_status = true;
adapter->data_sent =
mwifiex_usb_data_sent(adapter);
err = -1;
goto done;
}
if (port->tx_data_ix >= MWIFIEX_TX_DATA_URB)
port->tx_data_ix = 0;
urb_cnxt = &port->tx_data_list[port->tx_data_ix++];
err = mwifiex_usb_construct_send_urb(adapter, port, port->tx_data_ep,
urb_cnxt, skb_send);
done:
if (err == -1)
mwifiex_write_data_complete(adapter, skb_send, 0, -1);
unlock:
spin_unlock_irqrestore(&port->tx_aggr_lock, flags);
}
static void mwifiex_usb_tx_complete(struct urb *urb)
{
struct urb_context *context = (struct urb_context *)(urb->context);
struct mwifiex_adapter *adapter = context->adapter;
struct usb_card_rec *card = adapter->card;
struct usb_tx_data_port *port;
int i;
mwifiex_dbg(adapter, INFO,
"%s: status: %d\n", __func__, urb->status);
if (context->ep == card->tx_cmd_ep) {
mwifiex_dbg(adapter, CMD,
"%s: CMD\n", __func__);
atomic_dec(&card->tx_cmd_urb_pending);
adapter->cmd_sent = false;
} else {
mwifiex_dbg(adapter, DATA,
"%s: DATA\n", __func__);
mwifiex_write_data_complete(adapter, context->skb, 0,
urb->status ? -1 : 0);
for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
port = &card->port[i];
if (context->ep == port->tx_data_ep) {
atomic_dec(&port->tx_data_urb_pending);
port->block_status = false;
break;
}
}
adapter->data_sent = false;
}
if (card->mc_resync_flag)
mwifiex_multi_chan_resync(adapter);
mwifiex_queue_main_work(adapter);
return;
}
static void mwifiex_usb_tx_complete(struct urb *urb)
{
struct urb_context *context = (struct urb_context *)(urb->context);
struct mwifiex_adapter *adapter = context->adapter;
struct usb_card_rec *card = adapter->card;
dev_dbg(adapter->dev, "%s: status: %d\n", __func__, urb->status);
if (context->ep == card->tx_cmd_ep) {
dev_dbg(adapter->dev, "%s: CMD\n", __func__);
atomic_dec(&card->tx_cmd_urb_pending);
adapter->cmd_sent = false;
} else {
dev_dbg(adapter->dev, "%s: DATA\n", __func__);
atomic_dec(&card->tx_data_urb_pending);
mwifiex_write_data_complete(adapter, context->skb, 0,
urb->status ? -1 : 0);
}
queue_work(adapter->workqueue, &adapter->main_work);
return;
}
/*
* This function is used to shutdown the driver.
*
* The following operations are performed sequentially -
* - Check if already shut down
* - Make sure the main process has stopped
* - Clean up the Tx and Rx queues
* - Delete BSS priority tables
* - Free the adapter
* - Notify completion
*/
int
mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
{
int ret = -EINPROGRESS;
struct mwifiex_private *priv;
s32 i;
unsigned long flags;
struct sk_buff *skb;
/* mwifiex already shutdown */
if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
return 0;
adapter->hw_status = MWIFIEX_HW_STATUS_CLOSING;
/* wait for mwifiex_process to complete */
if (adapter->mwifiex_processing) {
mwifiex_dbg(adapter, WARN,
"main process is still running\n");
return ret;
}
/* cancel current command */
if (adapter->curr_cmd) {
mwifiex_dbg(adapter, WARN,
"curr_cmd is still in processing\n");
del_timer_sync(&adapter->cmd_timer);
mwifiex_recycle_cmd_node(adapter, adapter->curr_cmd);
adapter->curr_cmd = NULL;
}
/* shut down mwifiex */
mwifiex_dbg(adapter, MSG,
"info: shutdown mwifiex...\n");
/* Clean up Tx/Rx queues and delete BSS priority table */
for (i = 0; i < adapter->priv_num; i++) {
if (adapter->priv[i]) {
priv = adapter->priv[i];
mwifiex_clean_auto_tdls(priv);
mwifiex_abort_cac(priv);
mwifiex_clean_txrx(priv);
mwifiex_delete_bss_prio_tbl(priv);
}
}
atomic_set(&adapter->tx_queued, 0);
while ((skb = skb_dequeue(&adapter->tx_data_q)))
mwifiex_write_data_complete(adapter, skb, 0, 0);
spin_lock_irqsave(&adapter->rx_proc_lock, flags);
while ((skb = skb_dequeue(&adapter->rx_data_q))) {
struct mwifiex_rxinfo *rx_info = MWIFIEX_SKB_RXCB(skb);
atomic_dec(&adapter->rx_pending);
priv = adapter->priv[rx_info->bss_num];
if (priv)
priv->stats.rx_dropped++;
dev_kfree_skb_any(skb);
}
spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
spin_lock(&adapter->mwifiex_lock);
mwifiex_adapter_cleanup(adapter);
spin_unlock(&adapter->mwifiex_lock);
/* Notify completion */
ret = mwifiex_shutdown_fw_complete(adapter);
return ret;
}
/* This function prepare data packet to be send under usb tx aggregation
* protocol, check current usb aggregation status, link packet to aggrgation
* list if possible, work flow as below:
* (1) if only 1 packet available, add usb tx aggregation header and send.
* (2) if packet is able to aggregated, link it to current aggregation list.
* (3) if packet is not able to aggregated, aggregate and send exist packets
* in aggrgation list. Then, link packet in the list if there is more
* packet in transmit queue, otherwise try to transmit single packet.
*/
static int mwifiex_usb_aggr_tx_data(struct mwifiex_adapter *adapter, u8 ep,
struct sk_buff *skb,
struct mwifiex_tx_param *tx_param,
struct usb_tx_data_port *port)
{
u8 *payload, pad;
u16 align = adapter->bus_aggr.tx_aggr_align;
struct sk_buff *skb_send = NULL;
struct urb_context *context = NULL;
struct txpd *local_tx_pd =
(struct txpd *)((u8 *)skb->data + adapter->intf_hdr_len);
u8 f_send_aggr_buf = 0;
u8 f_send_cur_buf = 0;
u8 f_precopy_cur_buf = 0;
u8 f_postcopy_cur_buf = 0;
u32 timeout;
int ret;
/* padding to ensure each packet alginment */
pad = (align - (skb->len & (align - 1))) % align;
if (tx_param && tx_param->next_pkt_len) {
/* next packet available in tx queue*/
if (port->tx_aggr.aggr_len + skb->len + pad >
adapter->bus_aggr.tx_aggr_max_size) {
f_send_aggr_buf = 1;
f_postcopy_cur_buf = 1;
} else {
/* current packet could be aggregated*/
f_precopy_cur_buf = 1;
if (port->tx_aggr.aggr_len + skb->len + pad +
tx_param->next_pkt_len >
adapter->bus_aggr.tx_aggr_max_size ||
port->tx_aggr.aggr_num + 2 >
adapter->bus_aggr.tx_aggr_max_num) {
/* next packet could not be aggregated
* send current aggregation buffer
*/
f_send_aggr_buf = 1;
}
}
} else {
/* last packet in tx queue */
if (port->tx_aggr.aggr_num > 0) {
/* pending packets in aggregation buffer*/
if (port->tx_aggr.aggr_len + skb->len + pad >
adapter->bus_aggr.tx_aggr_max_size) {
/* current packet not be able to aggregated,
* send aggr buffer first, then send packet.
*/
f_send_cur_buf = 1;
} else {
/* last packet, Aggregation and send */
f_precopy_cur_buf = 1;
}
f_send_aggr_buf = 1;
} else {
/* no pending packets in aggregation buffer,
* send current packet immediately
*/
f_send_cur_buf = 1;
}
}
if (local_tx_pd->flags & MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET) {
/* Send NULL packet immediately*/
if (f_precopy_cur_buf) {
if (skb_queue_empty(&port->tx_aggr.aggr_list)) {
f_precopy_cur_buf = 0;
f_send_aggr_buf = 0;
f_send_cur_buf = 1;
} else {
f_send_aggr_buf = 1;
}
} else if (f_postcopy_cur_buf) {
f_send_cur_buf = 1;
f_postcopy_cur_buf = 0;
}
}
if (f_precopy_cur_buf) {
skb_queue_tail(&port->tx_aggr.aggr_list, skb);
port->tx_aggr.aggr_len += (skb->len + pad);
port->tx_aggr.aggr_num++;
if (f_send_aggr_buf)
goto send_aggr_buf;
/* packet will not been send immediately,
* set a timer to make sure it will be sent under
* strict time limit. Dynamically fit the timeout
* value, according to packets number in aggr_list
*/
if (!port->tx_aggr.timer_cnxt.is_hold_timer_set) {
port->tx_aggr.timer_cnxt.hold_tmo_msecs =
MWIFIEX_USB_TX_AGGR_TMO_MIN;
timeout =
port->tx_aggr.timer_cnxt.hold_tmo_msecs;
mod_timer(&port->tx_aggr.timer_cnxt.hold_timer,
jiffies + msecs_to_jiffies(timeout));
port->tx_aggr.timer_cnxt.is_hold_timer_set = true;
} else {
if (port->tx_aggr.timer_cnxt.hold_tmo_msecs <
MWIFIEX_USB_TX_AGGR_TMO_MAX) {
/* Dyanmic fit timeout */
timeout =
++port->tx_aggr.timer_cnxt.hold_tmo_msecs;
mod_timer(&port->tx_aggr.timer_cnxt.hold_timer,
jiffies + msecs_to_jiffies(timeout));
}
}
}
send_aggr_buf:
if (f_send_aggr_buf) {
ret = mwifiex_usb_prepare_tx_aggr_skb(adapter, port, &skb_send);
if (!ret) {
context = &port->tx_data_list[port->tx_data_ix++];
ret = mwifiex_usb_construct_send_urb(adapter, port, ep,
context, skb_send);
if (ret == -1)
mwifiex_write_data_complete(adapter, skb_send,
0, -1);
}
}
if (f_send_cur_buf) {
if (f_send_aggr_buf) {
if (atomic_read(&port->tx_data_urb_pending) >=
MWIFIEX_TX_DATA_URB) {
port->block_status = true;
adapter->data_sent =
mwifiex_usb_data_sent(adapter);
/* no available urb, postcopy packet*/
f_postcopy_cur_buf = 1;
goto postcopy_cur_buf;
}
if (port->tx_data_ix >= MWIFIEX_TX_DATA_URB)
port->tx_data_ix = 0;
}
payload = skb->data;
*(u16 *)&payload[2] =
cpu_to_le16(MWIFIEX_TYPE_AGGR_DATA_V2 | 0x80);
*(u16 *)payload = cpu_to_le16(skb->len);
skb_send = skb;
context = &port->tx_data_list[port->tx_data_ix++];
return mwifiex_usb_construct_send_urb(adapter, port, ep,
context, skb_send);
}
postcopy_cur_buf:
if (f_postcopy_cur_buf) {
skb_queue_tail(&port->tx_aggr.aggr_list, skb);
port->tx_aggr.aggr_len += (skb->len + pad);
port->tx_aggr.aggr_num++;
/* New aggregation begin, start timer */
if (!port->tx_aggr.timer_cnxt.is_hold_timer_set) {
port->tx_aggr.timer_cnxt.hold_tmo_msecs =
MWIFIEX_USB_TX_AGGR_TMO_MIN;
timeout = port->tx_aggr.timer_cnxt.hold_tmo_msecs;
mod_timer(&port->tx_aggr.timer_cnxt.hold_timer,
jiffies + msecs_to_jiffies(timeout));
port->tx_aggr.timer_cnxt.is_hold_timer_set = true;
}
}
return -EINPROGRESS;
}
static int mwifiex_usb_prepare_tx_aggr_skb(struct mwifiex_adapter *adapter,
struct usb_tx_data_port *port,
struct sk_buff **skb_send)
{
struct sk_buff *skb_aggr, *skb_tmp;
u8 *payload, pad;
u16 align = adapter->bus_aggr.tx_aggr_align;
struct mwifiex_txinfo *tx_info = NULL;
bool is_txinfo_set = false;
/* Packets in aggr_list will be send in either skb_aggr or
* write complete, delete the tx_aggr timer
*/
if (port->tx_aggr.timer_cnxt.is_hold_timer_set) {
del_timer(&port->tx_aggr.timer_cnxt.hold_timer);
port->tx_aggr.timer_cnxt.is_hold_timer_set = false;
port->tx_aggr.timer_cnxt.hold_tmo_msecs = 0;
}
skb_aggr = mwifiex_alloc_dma_align_buf(port->tx_aggr.aggr_len,
GFP_ATOMIC);
if (!skb_aggr) {
mwifiex_dbg(adapter, ERROR,
"%s: alloc skb_aggr failed\n", __func__);
while ((skb_tmp = skb_dequeue(&port->tx_aggr.aggr_list)))
mwifiex_write_data_complete(adapter, skb_tmp, 0, -1);
port->tx_aggr.aggr_num = 0;
port->tx_aggr.aggr_len = 0;
return -EBUSY;
}
tx_info = MWIFIEX_SKB_TXCB(skb_aggr);
memset(tx_info, 0, sizeof(*tx_info));
while ((skb_tmp = skb_dequeue(&port->tx_aggr.aggr_list))) {
/* padding for aligning next packet header*/
pad = (align - (skb_tmp->len & (align - 1))) % align;
payload = skb_put(skb_aggr, skb_tmp->len + pad);
memcpy(payload, skb_tmp->data, skb_tmp->len);
if (skb_queue_empty(&port->tx_aggr.aggr_list)) {
/* do not padding for last packet*/
*(u16 *)payload = cpu_to_le16(skb_tmp->len);
*(u16 *)&payload[2] =
cpu_to_le16(MWIFIEX_TYPE_AGGR_DATA_V2 | 0x80);
skb_trim(skb_aggr, skb_aggr->len - pad);
} else {
/* add aggregation interface header */
*(u16 *)payload = cpu_to_le16(skb_tmp->len + pad);
*(u16 *)&payload[2] =
cpu_to_le16(MWIFIEX_TYPE_AGGR_DATA_V2);
}
if (!is_txinfo_set) {
tx_info->bss_num = MWIFIEX_SKB_TXCB(skb_tmp)->bss_num;
tx_info->bss_type = MWIFIEX_SKB_TXCB(skb_tmp)->bss_type;
is_txinfo_set = true;
}
port->tx_aggr.aggr_num--;
port->tx_aggr.aggr_len -= (skb_tmp->len + pad);
mwifiex_write_data_complete(adapter, skb_tmp, 0, 0);
}
tx_info->pkt_len = skb_aggr->len -
(sizeof(struct txpd) + adapter->intf_hdr_len);
tx_info->flags |= MWIFIEX_BUF_FLAG_AGGR_PKT;
port->tx_aggr.aggr_num = 0;
port->tx_aggr.aggr_len = 0;
*skb_send = skb_aggr;
return 0;
}
/*
* This function sends a packet to device.
*
* It processes the packet to add the TxPD, checks condition and
* sends the processed packet to firmware for transmission.
*
* On successful completion, the function calls the completion callback
* and logs the time.
*/
int mwifiex_process_tx(struct mwifiex_private *priv, struct sk_buff *skb,
struct mwifiex_tx_param *tx_param)
{
int ret = -1;
struct mwifiex_adapter *adapter = priv->adapter;
u8 *head_ptr;
struct txpd *local_tx_pd = NULL;
if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP)
head_ptr = mwifiex_process_uap_txpd(priv, skb);
else
head_ptr = mwifiex_process_sta_txpd(priv, skb);
if (head_ptr) {
if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA)
local_tx_pd =
(struct txpd *) (head_ptr + INTF_HEADER_LEN);
if (adapter->iface_type == MWIFIEX_USB) {
adapter->data_sent = true;
skb_pull(skb, INTF_HEADER_LEN);
ret = adapter->if_ops.host_to_card(adapter,
MWIFIEX_USB_EP_DATA,
skb, NULL);
} else {
ret = adapter->if_ops.host_to_card(adapter,
MWIFIEX_TYPE_DATA,
skb, tx_param);
}
}
switch (ret) {
case -ENOSR:
dev_err(adapter->dev, "data: -ENOSR is returned\n");
break;
case -EBUSY:
if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) &&
(adapter->pps_uapsd_mode) && (adapter->tx_lock_flag)) {
priv->adapter->tx_lock_flag = false;
if (local_tx_pd)
local_tx_pd->flags = 0;
}
dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
break;
case -1:
if (adapter->iface_type != MWIFIEX_PCIE)
adapter->data_sent = false;
dev_err(adapter->dev, "mwifiex_write_data_async failed: 0x%X\n",
ret);
adapter->dbg.num_tx_host_to_card_failure++;
mwifiex_write_data_complete(adapter, skb, 0, ret);
break;
case -EINPROGRESS:
if (adapter->iface_type != MWIFIEX_PCIE)
adapter->data_sent = false;
break;
case 0:
mwifiex_write_data_complete(adapter, skb, 0, ret);
break;
default:
break;
}
return ret;
}
