static int mwifiex_decode_rx_packet(struct mwifiex_adapter *adapter,
struct sk_buff *skb, u32 upld_typ)
{
u8 *cmd_buf;
skb_pull(skb, INTF_HEADER_LEN);
switch (upld_typ) {
case MWIFIEX_TYPE_DATA:
dev_dbg(adapter->dev, "info: --- Rx: Data packet ---\n");
mwifiex_handle_rx_packet(adapter, skb);
break;
case MWIFIEX_TYPE_CMD:
dev_dbg(adapter->dev, "info: --- Rx: Cmd Response ---\n");
if (!adapter->curr_cmd) {
cmd_buf = adapter->upld_buf;
if (adapter->ps_state == PS_STATE_SLEEP_CFM)
mwifiex_process_sleep_confirm_resp(adapter,
skb->data,
skb->len);
memcpy(cmd_buf, skb->data,
min_t(u32, MWIFIEX_SIZE_OF_CMD_BUFFER,
skb->len));
dev_kfree_skb_any(skb);
} else {
adapter->cmd_resp_received = true;
adapter->curr_cmd->resp_skb = skb;
}
break;
case MWIFIEX_TYPE_EVENT:
dev_dbg(adapter->dev, "info: --- Rx: Event ---\n");
adapter->event_cause = *(u32 *) skb->data;
skb_pull(skb, MWIFIEX_EVENT_HEADER_LEN);
if ((skb->len > 0) && (skb->len < MAX_EVENT_SIZE))
memcpy(adapter->event_body, skb->data, skb->len);
adapter->event_received = true;
adapter->event_skb = skb;
break;
default:
dev_err(adapter->dev, "unknown upload type %#x\n", upld_typ);
dev_kfree_skb_any(skb);
break;
}
return 0;
}
/* This function handles received packet. Necessary action is taken based on
* cmd/event/data.
*/
static int mwifiex_usb_recv(struct mwifiex_adapter *adapter,
struct sk_buff *skb, u8 ep)
{
struct device *dev = adapter->dev;
u32 recv_type;
__le32 tmp;
int ret;
if (adapter->hs_activated)
mwifiex_process_hs_config(adapter);
if (skb->len < INTF_HEADER_LEN) {
dev_err(dev, "%s: invalid skb->len\n", __func__);
return -1;
}
switch (ep) {
case MWIFIEX_USB_EP_CMD_EVENT:
dev_dbg(dev, "%s: EP_CMD_EVENT\n", __func__);
skb_copy_from_linear_data(skb, &tmp, INTF_HEADER_LEN);
recv_type = le32_to_cpu(tmp);
skb_pull(skb, INTF_HEADER_LEN);
switch (recv_type) {
case MWIFIEX_USB_TYPE_CMD:
if (skb->len > MWIFIEX_SIZE_OF_CMD_BUFFER) {
dev_err(dev, "CMD: skb->len too large\n");
ret = -1;
goto exit_restore_skb;
} else if (!adapter->curr_cmd) {
dev_dbg(dev, "CMD: no curr_cmd\n");
if (adapter->ps_state == PS_STATE_SLEEP_CFM) {
mwifiex_process_sleep_confirm_resp(
adapter, skb->data,
skb->len);
ret = 0;
goto exit_restore_skb;
}
ret = -1;
goto exit_restore_skb;
}
adapter->curr_cmd->resp_skb = skb;
adapter->cmd_resp_received = true;
break;
case MWIFIEX_USB_TYPE_EVENT:
if (skb->len < sizeof(u32)) {
dev_err(dev, "EVENT: skb->len too small\n");
ret = -1;
goto exit_restore_skb;
}
skb_copy_from_linear_data(skb, &tmp, sizeof(u32));
adapter->event_cause = le32_to_cpu(tmp);
dev_dbg(dev, "event_cause %#x\n", adapter->event_cause);
if (skb->len > MAX_EVENT_SIZE) {
dev_err(dev, "EVENT: event body too large\n");
ret = -1;
goto exit_restore_skb;
}
memcpy(adapter->event_body, skb->data +
MWIFIEX_EVENT_HEADER_LEN, skb->len);
adapter->event_received = true;
adapter->event_skb = skb;
break;
default:
dev_err(dev, "unknown recv_type %#x\n", recv_type);
return -1;
}
break;
case MWIFIEX_USB_EP_DATA:
dev_dbg(dev, "%s: EP_DATA\n", __func__);
if (skb->len > MWIFIEX_RX_DATA_BUF_SIZE) {
dev_err(dev, "DATA: skb->len too large\n");
return -1;
}
skb_queue_tail(&adapter->usb_rx_data_q, skb);
adapter->data_received = true;
break;
default:
dev_err(dev, "%s: unknown endport %#x\n", __func__, ep);
return -1;
}
return -EINPROGRESS;
exit_restore_skb:
/* The buffer will be reused for further cmds/events */
skb_push(skb, INTF_HEADER_LEN);
return ret;
}