![Greg Ungerer](/assets/img/avatar_default.png)
Add support for the net stats64 counters to the usbnet core. With that in place put the hooks into every usbnet driver to use it. This is a strait forward addition of 64bit counters for RX and TX packet and byte counts. It is done in the same style as for the other net drivers that support stats64. Note that the other stats fields remain as 32bit sized values (error counts, etc). The motivation to add this is that it is not particularly difficult to get the RX and TX byte counts to wrap on 32bit platforms. Signed-off-by: Greg Ungerer <gerg@linux-m68k.org> Acked-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: David S. Miller <davem@davemloft.net>
201 lines
5.5 KiB
C
201 lines
5.5 KiB
C
/*
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* Copyright (c) 2009 Peter Holik
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*
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* Intellon usb PLC (Powerline Communications) usb net driver
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*
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* http://www.tandel.be/downloads/INT51X1_Datasheet.pdf
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*
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* Based on the work of Jan 'RedBully' Seiffert
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*/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or.
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/module.h>
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#include <linux/ctype.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/ethtool.h>
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#include <linux/slab.h>
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#include <linux/mii.h>
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#include <linux/usb.h>
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#include <linux/usb/usbnet.h>
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#define INT51X1_VENDOR_ID 0x09e1
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#define INT51X1_PRODUCT_ID 0x5121
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#define INT51X1_HEADER_SIZE 2 /* 2 byte header */
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#define PACKET_TYPE_PROMISCUOUS (1 << 0)
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#define PACKET_TYPE_ALL_MULTICAST (1 << 1) /* no filter */
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#define PACKET_TYPE_DIRECTED (1 << 2)
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#define PACKET_TYPE_BROADCAST (1 << 3)
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#define PACKET_TYPE_MULTICAST (1 << 4) /* filtered */
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#define SET_ETHERNET_PACKET_FILTER 0x43
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static int int51x1_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
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{
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int len;
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if (!(pskb_may_pull(skb, INT51X1_HEADER_SIZE))) {
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netdev_err(dev->net, "unexpected tiny rx frame\n");
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return 0;
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}
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len = le16_to_cpu(*(__le16 *)&skb->data[skb->len - 2]);
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skb_trim(skb, len);
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return 1;
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}
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static struct sk_buff *int51x1_tx_fixup(struct usbnet *dev,
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struct sk_buff *skb, gfp_t flags)
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{
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int pack_len = skb->len;
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int pack_with_header_len = pack_len + INT51X1_HEADER_SIZE;
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int headroom = skb_headroom(skb);
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int tailroom = skb_tailroom(skb);
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int need_tail = 0;
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__le16 *len;
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/* if packet and our header is smaler than 64 pad to 64 (+ ZLP) */
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if ((pack_with_header_len) < dev->maxpacket)
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need_tail = dev->maxpacket - pack_with_header_len + 1;
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/*
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* usbnet would send a ZLP if packetlength mod urbsize == 0 for us,
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* but we need to know ourself, because this would add to the length
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* we send down to the device...
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*/
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else if (!(pack_with_header_len % dev->maxpacket))
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need_tail = 1;
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if (!skb_cloned(skb) &&
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(headroom + tailroom >= need_tail + INT51X1_HEADER_SIZE)) {
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if (headroom < INT51X1_HEADER_SIZE || tailroom < need_tail) {
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skb->data = memmove(skb->head + INT51X1_HEADER_SIZE,
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skb->data, skb->len);
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skb_set_tail_pointer(skb, skb->len);
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}
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} else {
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struct sk_buff *skb2;
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skb2 = skb_copy_expand(skb,
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INT51X1_HEADER_SIZE,
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need_tail,
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flags);
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dev_kfree_skb_any(skb);
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if (!skb2)
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return NULL;
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skb = skb2;
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}
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pack_len += need_tail;
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pack_len &= 0x07ff;
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len = (__le16 *) __skb_push(skb, INT51X1_HEADER_SIZE);
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*len = cpu_to_le16(pack_len);
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if(need_tail)
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memset(__skb_put(skb, need_tail), 0, need_tail);
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return skb;
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}
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static void int51x1_set_multicast(struct net_device *netdev)
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{
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struct usbnet *dev = netdev_priv(netdev);
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u16 filter = PACKET_TYPE_DIRECTED | PACKET_TYPE_BROADCAST;
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if (netdev->flags & IFF_PROMISC) {
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/* do not expect to see traffic of other PLCs */
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filter |= PACKET_TYPE_PROMISCUOUS;
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netdev_info(dev->net, "promiscuous mode enabled\n");
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} else if (!netdev_mc_empty(netdev) ||
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(netdev->flags & IFF_ALLMULTI)) {
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filter |= PACKET_TYPE_ALL_MULTICAST;
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netdev_dbg(dev->net, "receive all multicast enabled\n");
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} else {
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/* ~PROMISCUOUS, ~MULTICAST */
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netdev_dbg(dev->net, "receive own packets only\n");
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}
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usbnet_write_cmd_async(dev, SET_ETHERNET_PACKET_FILTER,
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USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
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filter, 0, NULL, 0);
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}
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static const struct net_device_ops int51x1_netdev_ops = {
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.ndo_open = usbnet_open,
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.ndo_stop = usbnet_stop,
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.ndo_start_xmit = usbnet_start_xmit,
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.ndo_tx_timeout = usbnet_tx_timeout,
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.ndo_change_mtu = usbnet_change_mtu,
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.ndo_get_stats64 = usbnet_get_stats64,
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.ndo_set_mac_address = eth_mac_addr,
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.ndo_validate_addr = eth_validate_addr,
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.ndo_set_rx_mode = int51x1_set_multicast,
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};
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static int int51x1_bind(struct usbnet *dev, struct usb_interface *intf)
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{
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int status = usbnet_get_ethernet_addr(dev, 3);
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if (status)
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return status;
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dev->net->hard_header_len += INT51X1_HEADER_SIZE;
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dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
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dev->net->netdev_ops = &int51x1_netdev_ops;
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return usbnet_get_endpoints(dev, intf);
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}
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static const struct driver_info int51x1_info = {
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.description = "Intellon usb powerline adapter",
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.bind = int51x1_bind,
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.rx_fixup = int51x1_rx_fixup,
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.tx_fixup = int51x1_tx_fixup,
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.in = 1,
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.out = 2,
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.flags = FLAG_ETHER,
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};
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static const struct usb_device_id products[] = {
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{
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USB_DEVICE(INT51X1_VENDOR_ID, INT51X1_PRODUCT_ID),
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.driver_info = (unsigned long) &int51x1_info,
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},
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{},
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};
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MODULE_DEVICE_TABLE(usb, products);
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static struct usb_driver int51x1_driver = {
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.name = "int51x1",
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.id_table = products,
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.probe = usbnet_probe,
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.disconnect = usbnet_disconnect,
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.suspend = usbnet_suspend,
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.resume = usbnet_resume,
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.disable_hub_initiated_lpm = 1,
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};
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module_usb_driver(int51x1_driver);
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MODULE_AUTHOR("Peter Holik");
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MODULE_DESCRIPTION("Intellon usb powerline adapter");
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MODULE_LICENSE("GPL");
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