static int brcmf_usb_tx(struct device *dev, struct sk_buff *skb)
{
struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
struct brcmf_usbreq *req;
int ret;
if (devinfo->bus_pub.state != BCMFMAC_USB_STATE_UP) {
/* TODO: handle suspend/resume */
return -EIO;
}
req = brcmf_usb_deq(devinfo, &devinfo->tx_freeq);
if (!req) {
brcmu_pkt_buf_free_skb(skb);
brcmf_dbg(ERROR, "no req to send\n");
return -ENOMEM;
}
req->skb = skb;
req->devinfo = devinfo;
usb_fill_bulk_urb(req->urb, devinfo->usbdev, devinfo->tx_pipe,
skb->data, skb->len, brcmf_usb_tx_complete, req);
req->urb->transfer_flags |= URB_ZERO_PACKET;
brcmf_usb_enq(devinfo, &devinfo->tx_postq, req);
ret = usb_submit_urb(req->urb, GFP_ATOMIC);
if (ret) {
brcmf_dbg(ERROR, "brcmf_usb_tx usb_submit_urb FAILED\n");
brcmf_usb_del_fromq(devinfo, req);
brcmu_pkt_buf_free_skb(req->skb);
req->skb = NULL;
brcmf_usb_enq(devinfo, &devinfo->tx_freeq, req);
}
return ret;
}
static void brcmf_usb_rx_fill_all(struct brcmf_usbdev_info *devinfo)
{
struct brcmf_usbreq *req;
if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) {
brcmf_err("bus is not up=%d\n", devinfo->bus_pub.state);
return;
}
while ((req = brcmf_usb_deq(devinfo, &devinfo->rx_freeq, NULL)) != NULL)
brcmf_usb_rx_refill(devinfo, req);
}
static void brcmf_usb_rx_fill_all(struct brcmf_usbdev_info *devinfo)
{
struct brcmf_usbreq *req;
if (devinfo->bus_pub.state != BCMFMAC_USB_STATE_UP) {
brcmf_dbg(ERROR, "bus is not up\n");
return;
}
while ((req = brcmf_usb_deq(devinfo, &devinfo->rx_freeq)) != NULL)
brcmf_usb_rx_refill(devinfo, req);
}
static int brcmf_usb_tx(struct device *dev, struct sk_buff *skb)
{
struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
struct brcmf_usbreq *req;
int ret;
unsigned long flags;
brcmf_dbg(USB, "Enter, skb=%p\n", skb);
if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) {
ret = -EIO;
goto fail;
}
req = brcmf_usb_deq(devinfo, &devinfo->tx_freeq,
&devinfo->tx_freecount);
if (!req) {
brcmf_err("no req to send\n");
ret = -ENOMEM;
goto fail;
}
req->skb = skb;
req->devinfo = devinfo;
usb_fill_bulk_urb(req->urb, devinfo->usbdev, devinfo->tx_pipe,
skb->data, skb->len, brcmf_usb_tx_complete, req);
req->urb->transfer_flags |= URB_ZERO_PACKET;
brcmf_usb_enq(devinfo, &devinfo->tx_postq, req, NULL);
ret = usb_submit_urb(req->urb, GFP_ATOMIC);
if (ret) {
brcmf_err("brcmf_usb_tx usb_submit_urb FAILED\n");
brcmf_usb_del_fromq(devinfo, req);
req->skb = NULL;
brcmf_usb_enq(devinfo, &devinfo->tx_freeq, req,
&devinfo->tx_freecount);
goto fail;
}
spin_lock_irqsave(&devinfo->tx_flowblock_lock, flags);
if (devinfo->tx_freecount < devinfo->tx_low_watermark &&
!devinfo->tx_flowblock) {
brcmf_txflowblock(dev, true);
devinfo->tx_flowblock = true;
}
spin_unlock_irqrestore(&devinfo->tx_flowblock_lock, flags);
return 0;
fail:
return ret;
}
