#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/ctype.h>
+#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/workqueue.h>
#include <linux/mii.h>
static DEVICE_ATTR(tx_max, S_IRUGO | S_IWUSR, cdc_ncm_show_tx_max, cdc_ncm_store_tx_max);
static DEVICE_ATTR(tx_timer_usecs, S_IRUGO | S_IWUSR, cdc_ncm_show_tx_timer_usecs, cdc_ncm_store_tx_timer_usecs);
+static ssize_t ndp_to_end_show(struct device *d, struct device_attribute *attr, char *buf)
+{
+ struct usbnet *dev = netdev_priv(to_net_dev(d));
+ struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
+
+ return sprintf(buf, "%c\n", ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END ? 'Y' : 'N');
+}
+
+static ssize_t ndp_to_end_store(struct device *d, struct device_attribute *attr, const char *buf, size_t len)
+{
+ struct usbnet *dev = netdev_priv(to_net_dev(d));
+ struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
+ bool enable;
+
+ if (strtobool(buf, &enable))
+ return -EINVAL;
+
+ /* no change? */
+ if (enable == (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END))
+ return len;
+
+ if (enable && !ctx->delayed_ndp16) {
+ ctx->delayed_ndp16 = kzalloc(ctx->max_ndp_size, GFP_KERNEL);
+ if (!ctx->delayed_ndp16)
+ return -ENOMEM;
+ }
+
+ /* flush pending data before changing flag */
+ netif_tx_lock_bh(dev->net);
+ usbnet_start_xmit(NULL, dev->net);
+ spin_lock_bh(&ctx->mtx);
+ if (enable)
+ ctx->drvflags |= CDC_NCM_FLAG_NDP_TO_END;
+ else
+ ctx->drvflags &= ~CDC_NCM_FLAG_NDP_TO_END;
+ spin_unlock_bh(&ctx->mtx);
+ netif_tx_unlock_bh(dev->net);
+
+ return len;
+}
+static DEVICE_ATTR_RW(ndp_to_end);
+
#define NCM_PARM_ATTR(name, format, tocpu) \
static ssize_t cdc_ncm_show_##name(struct device *d, struct device_attribute *attr, char *buf) \
{ \
static struct attribute *cdc_ncm_sysfs_attrs[] = {
&dev_attr_min_tx_pkt.attr,
+ &dev_attr_ndp_to_end.attr,
&dev_attr_rx_max.attr,
&dev_attr_tx_max.attr,
&dev_attr_tx_timer_usecs.attr,
kfree(ctx);
}
+/* we need to override the usbnet change_mtu ndo for two reasons:
+ * - respect the negotiated maximum datagram size
+ * - avoid unwanted changes to rx and tx buffers
+ */
+int cdc_ncm_change_mtu(struct net_device *net, int new_mtu)
+{
+ struct usbnet *dev = netdev_priv(net);
+ struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
+ int maxmtu = ctx->max_datagram_size - cdc_ncm_eth_hlen(dev);
+
+ if (new_mtu <= 0 || new_mtu > maxmtu)
+ return -EINVAL;
+ net->mtu = new_mtu;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cdc_ncm_change_mtu);
+
+static const struct net_device_ops cdc_ncm_netdev_ops = {
+ .ndo_open = usbnet_open,
+ .ndo_stop = usbnet_stop,
+ .ndo_start_xmit = usbnet_start_xmit,
+ .ndo_tx_timeout = usbnet_tx_timeout,
+ .ndo_change_mtu = cdc_ncm_change_mtu,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_validate_addr = eth_validate_addr,
+};
+
int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting, int drvflags)
{
struct cdc_ncm_ctx *ctx;
/* add our sysfs attrs */
dev->net->sysfs_groups[0] = &cdc_ncm_sysfs_attr_group;
+ /* must handle MTU changes */
+ dev->net->netdev_ops = &cdc_ncm_netdev_ops;
+
return 0;
error2:
.driver_info = (unsigned long) &wwan_info,
},
+ /* DW5812 LTE Verizon Mobile Broadband Card
+ * Unlike DW5550 this device requires FLAG_NOARP
+ */
+ { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bb,
+ USB_CLASS_COMM,
+ USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
+ .driver_info = (unsigned long)&wwan_noarp_info,
+ },
+
+ /* DW5813 LTE AT&T Mobile Broadband Card
+ * Unlike DW5550 this device requires FLAG_NOARP
+ */
+ { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bc,
+ USB_CLASS_COMM,
+ USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
+ .driver_info = (unsigned long)&wwan_noarp_info,
+ },
+
/* Dell branded MBM devices like DW5550 */
{ .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
| USB_DEVICE_ID_MATCH_VENDOR,