static int mwifiex_usb_construct_send_urb(struct mwifiex_adapter *adapter,
struct usb_tx_data_port *port, u8 ep,
struct urb_context *context,
struct sk_buff *skb_send)
{
struct usb_card_rec *card = adapter->card;
int ret = -EINPROGRESS;
struct urb *tx_urb;
context->adapter = adapter;
context->ep = ep;
context->skb = skb_send;
tx_urb = context->urb;
if (ep == card->tx_cmd_ep &&
card->tx_cmd_ep_type == USB_ENDPOINT_XFER_INT)
usb_fill_int_urb(tx_urb, card->udev,
usb_sndintpipe(card->udev, ep), skb_send->data,
skb_send->len, mwifiex_usb_tx_complete,
(void *)context, card->tx_cmd_interval);
else
usb_fill_bulk_urb(tx_urb, card->udev,
usb_sndbulkpipe(card->udev, ep),
skb_send->data, skb_send->len,
mwifiex_usb_tx_complete, (void *)context);
tx_urb->transfer_flags |= URB_ZERO_PACKET;
if (ep == card->tx_cmd_ep)
atomic_inc(&card->tx_cmd_urb_pending);
else
atomic_inc(&port->tx_data_urb_pending);
if (ep != card->tx_cmd_ep &&
atomic_read(&port->tx_data_urb_pending) ==
MWIFIEX_TX_DATA_URB) {
port->block_status = true;
adapter->data_sent = mwifiex_usb_data_sent(adapter);
ret = -ENOSR;
}
if (usb_submit_urb(tx_urb, GFP_ATOMIC)) {
mwifiex_dbg(adapter, ERROR,
"%s: usb_submit_urb failed\n", __func__);
if (ep == card->tx_cmd_ep) {
atomic_dec(&card->tx_cmd_urb_pending);
} else {
atomic_dec(&port->tx_data_urb_pending);
port->block_status = false;
adapter->data_sent = false;
if (port->tx_data_ix)
port->tx_data_ix--;
else
port->tx_data_ix = MWIFIEX_TX_DATA_URB;
}
ret = -1;
}
return ret;
}
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);
}
/* 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;
}
/* This function write a command/data packet to card. */
static int mwifiex_usb_host_to_card(struct mwifiex_adapter *adapter, u8 ep,
struct sk_buff *skb,
struct mwifiex_tx_param *tx_param)
{
struct usb_card_rec *card = adapter->card;
struct urb_context *context = NULL;
struct usb_tx_data_port *port = NULL;
unsigned long flags;
int idx, ret;
if (adapter->is_suspended) {
mwifiex_dbg(adapter, ERROR,
"%s: not allowed while suspended\n", __func__);
return -1;
}
if (adapter->surprise_removed) {
mwifiex_dbg(adapter, ERROR, "%s: device removed\n", __func__);
return -1;
}
mwifiex_dbg(adapter, INFO, "%s: ep=%d\n", __func__, ep);
if (ep == card->tx_cmd_ep) {
context = &card->tx_cmd;
} else {
/* get the data port structure for endpoint */
for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
if (ep == card->port[idx].tx_data_ep) {
port = &card->port[idx];
if (atomic_read(&port->tx_data_urb_pending)
>= MWIFIEX_TX_DATA_URB) {
port->block_status = true;
adapter->data_sent =
mwifiex_usb_data_sent(adapter);
return -EBUSY;
}
if (port->tx_data_ix >= MWIFIEX_TX_DATA_URB)
port->tx_data_ix = 0;
break;
}
}
if (!port) {
mwifiex_dbg(adapter, ERROR, "Wrong usb tx data port\n");
return -1;
}
if (adapter->bus_aggr.enable) {
spin_lock_irqsave(&port->tx_aggr_lock, flags);
ret = mwifiex_usb_aggr_tx_data(adapter, ep, skb,
tx_param, port);
spin_unlock_irqrestore(&port->tx_aggr_lock, flags);
return ret;
}
context = &port->tx_data_list[port->tx_data_ix++];
}
return mwifiex_usb_construct_send_urb(adapter, port, ep, context, skb);
}
/* This function write a command/data packet to card. */
static int mwifiex_usb_host_to_card(struct mwifiex_adapter *adapter, u8 ep,
struct sk_buff *skb,
struct mwifiex_tx_param *tx_param)
{
struct usb_card_rec *card = adapter->card;
struct urb_context *context = NULL;
struct usb_tx_data_port *port = NULL;
u8 *data = (u8 *)skb->data;
struct urb *tx_urb;
int idx, ret;
if (adapter->is_suspended) {
mwifiex_dbg(adapter, ERROR,
"%s: not allowed while suspended\n", __func__);
return -1;
}
if (adapter->surprise_removed) {
mwifiex_dbg(adapter, ERROR, "%s: device removed\n", __func__);
return -1;
}
mwifiex_dbg(adapter, INFO, "%s: ep=%d\n", __func__, ep);
if (ep == card->tx_cmd_ep) {
context = &card->tx_cmd;
} else {
for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
if (ep == card->port[idx].tx_data_ep) {
port = &card->port[idx];
if (atomic_read(&port->tx_data_urb_pending)
>= MWIFIEX_TX_DATA_URB) {
port->block_status = true;
ret = -EBUSY;
goto done;
}
if (port->tx_data_ix >= MWIFIEX_TX_DATA_URB)
port->tx_data_ix = 0;
context =
&port->tx_data_list[port->tx_data_ix++];
break;
}
}
if (!port) {
mwifiex_dbg(adapter, ERROR, "Wrong usb tx data port\n");
return -1;
}
}
context->adapter = adapter;
context->ep = ep;
context->skb = skb;
tx_urb = context->urb;
usb_fill_bulk_urb(tx_urb, card->udev, usb_sndbulkpipe(card->udev, ep),
data, skb->len, mwifiex_usb_tx_complete,
(void *)context);
tx_urb->transfer_flags |= URB_ZERO_PACKET;
if (ep == card->tx_cmd_ep)
atomic_inc(&card->tx_cmd_urb_pending);
else
atomic_inc(&port->tx_data_urb_pending);
if (usb_submit_urb(tx_urb, GFP_ATOMIC)) {
mwifiex_dbg(adapter, ERROR,
"%s: usb_submit_urb failed\n", __func__);
if (ep == card->tx_cmd_ep) {
atomic_dec(&card->tx_cmd_urb_pending);
} else {
atomic_dec(&port->tx_data_urb_pending);
port->block_status = false;
if (port->tx_data_ix)
port->tx_data_ix--;
else
port->tx_data_ix = MWIFIEX_TX_DATA_URB;
}
return -1;
} else {
if (ep != card->tx_cmd_ep &&
atomic_read(&port->tx_data_urb_pending) ==
MWIFIEX_TX_DATA_URB) {
port->block_status = true;
ret = -ENOSR;
goto done;
}
}
return -EINPROGRESS;
done:
if (ep != card->tx_cmd_ep)
adapter->data_sent = mwifiex_usb_data_sent(adapter);
return ret;
}
