/*
* USB Networking Links
- * Copyright (C) 2000-2005 by David Brownell <dbrownell@users.sourceforge.net>
+ * Copyright (C) 2000-2005 by David Brownell
* Copyright (C) 2002 Pavel Machek <pavel@ucw.cz>
* Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>
* Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
-#include <linux/random.h>
#include <linux/ethtool.h>
#include <linux/workqueue.h>
#include <linux/mii.h>
-#include <asm/uaccess.h>
-#include <asm/unaligned.h>
#include <linux/usb.h>
-#include <asm/io.h>
-#include <asm/scatterlist.h>
#include <linux/mm.h>
#include <linux/dma-mapping.h>
-#define DRIVER_VERSION "03-Nov-2004"
+#include <asm/unaligned.h>
+
+#include "usbnet.h"
+
+#define DRIVER_VERSION "22-Aug-2005"
/*-------------------------------------------------------------------------*/
* One maximum size Ethernet packet takes twenty four of them.
* For high speed, each frame comfortably fits almost 36 max size
* Ethernet packets (so queues should be bigger).
+ *
+ * REVISIT qlens should be members of 'struct usbnet'; the goal is to
+ * let the USB host controller be busy for 5msec or more before an irq
+ * is required, under load. Jumbograms change the equation.
*/
#define RX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? 60 : 4)
#define TX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? 60 : 4)
-// packets are always ethernet inside
-// ... except they can be bigger (limit of 64K with NetChip framing)
+/* packets are always ethernet, sometimes wrapped in other framing */
#define MIN_PACKET sizeof(struct ethhdr)
-#define MAX_PACKET 32768
// reawaken network queue this soon after stopping; else watchdog barks
#define TX_TIMEOUT_JIFFIES (5*HZ)
#define THROTTLE_JIFFIES (HZ/8)
// for vendor-specific control operations
-#define CONTROL_TIMEOUT_MS 500
+#define CONTROL_TIMEOUT_MS USB_CTRL_GET_TIMEOUT
// between wakeups
#define UNLINK_TIMEOUT_MS 3
// randomly generated ethernet address
static u8 node_id [ETH_ALEN];
-// state we keep for each device we handle
-struct usbnet {
- // housekeeping
- struct usb_device *udev;
- struct driver_info *driver_info;
- wait_queue_head_t *wait;
-
- // i/o info: pipes etc
- unsigned in, out;
- struct usb_host_endpoint *status;
- unsigned maxpacket;
- struct timer_list delay;
-
- // protocol/interface state
- struct net_device *net;
- struct net_device_stats stats;
- int msg_enable;
- unsigned long data [5];
-
- struct mii_if_info mii;
-
- // various kinds of pending driver work
- struct sk_buff_head rxq;
- struct sk_buff_head txq;
- struct sk_buff_head done;
- struct urb *interrupt;
- struct tasklet_struct bh;
-
- struct work_struct kevent;
- unsigned long flags;
-# define EVENT_TX_HALT 0
-# define EVENT_RX_HALT 1
-# define EVENT_RX_MEMORY 2
-# define EVENT_STS_SPLIT 3
-# define EVENT_LINK_RESET 4
-};
-
-// device-specific info used by the driver
-struct driver_info {
- char *description;
-
- int flags;
-/* framing is CDC Ethernet, not writing ZLPs (hw issues), or optionally: */
-#define FLAG_FRAMING_NC 0x0001 /* guard against device dropouts */
-#define FLAG_FRAMING_GL 0x0002 /* genelink batches packets */
-#define FLAG_FRAMING_Z 0x0004 /* zaurus adds a trailer */
-#define FLAG_FRAMING_RN 0x0008 /* RNDIS batches, plus huge header */
-
-#define FLAG_NO_SETINT 0x0010 /* device can't set_interface() */
-#define FLAG_ETHER 0x0020 /* maybe use "eth%d" names */
-
-#define FLAG_FRAMING_AX 0x0040 /* AX88772/178 packets */
-
- /* init device ... can sleep, or cause probe() failure */
- int (*bind)(struct usbnet *, struct usb_interface *);
-
- /* cleanup device ... can sleep, but can't fail */
- void (*unbind)(struct usbnet *, struct usb_interface *);
-
- /* reset device ... can sleep */
- int (*reset)(struct usbnet *);
-
- /* see if peer is connected ... can sleep */
- int (*check_connect)(struct usbnet *);
-
- /* for status polling */
- void (*status)(struct usbnet *, struct urb *);
-
- /* link reset handling, called from defer_kevent */
- int (*link_reset)(struct usbnet *);
-
- /* fixup rx packet (strip framing) */
- int (*rx_fixup)(struct usbnet *dev, struct sk_buff *skb);
-
- /* fixup tx packet (add framing) */
- struct sk_buff *(*tx_fixup)(struct usbnet *dev,
- struct sk_buff *skb, unsigned flags);
-
- // FIXME -- also an interrupt mechanism
- // useful for at least PL2301/2302 and GL620USB-A
- // and CDC use them to report 'is it connected' changes
-
- /* for new devices, use the descriptor-reading code instead */
- int in; /* rx endpoint */
- int out; /* tx endpoint */
-
- unsigned long data; /* Misc driver specific data */
-};
-
-// we record the state for each of our queued skbs
-enum skb_state {
- illegal = 0,
- tx_start, tx_done,
- rx_start, rx_done, rx_cleanup
-};
-
-struct skb_data { // skb->cb is one of these
- struct urb *urb;
- struct usbnet *dev;
- enum skb_state state;
- size_t length;
-};
-
static const char driver_name [] = "usbnet";
/* use ethtool to change the level for any given device */
module_param (msg_level, int, 0);
MODULE_PARM_DESC (msg_level, "Override default message level");
-
-#ifdef DEBUG
-#define devdbg(usbnet, fmt, arg...) \
- printk(KERN_DEBUG "%s: " fmt "\n" , (usbnet)->net->name , ## arg)
-#else
-#define devdbg(usbnet, fmt, arg...) do {} while(0)
-#endif
-
-#define deverr(usbnet, fmt, arg...) \
- printk(KERN_ERR "%s: " fmt "\n" , (usbnet)->net->name , ## arg)
-#define devwarn(usbnet, fmt, arg...) \
- printk(KERN_WARNING "%s: " fmt "\n" , (usbnet)->net->name , ## arg)
-
-#define devinfo(usbnet, fmt, arg...) \
- printk(KERN_INFO "%s: " fmt "\n" , (usbnet)->net->name , ## arg); \
-
/*-------------------------------------------------------------------------*/
static void usbnet_get_drvinfo (struct net_device *, struct ethtool_drvinfo *);
ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP);
mii_nway_restart(&dev->mii);
+ if (dev->driver_info->flags & FLAG_FRAMING_AX) {
+ /* REVISIT: adjust hard_header_len too */
+ dev->hard_mtu = 2048;
+ }
+
return 0;
out2:
kfree(buf);
info->ether->bLength);
goto bad_desc;
}
- dev->net->mtu = le16_to_cpup (
- &info->ether->wMaxSegmentSize)
- - ETH_HLEN;
+ dev->hard_mtu = le16_to_cpu(
+ info->ether->wMaxSegmentSize);
/* because of Zaurus, we may be ignoring the host
* side link address we were given.
*/
return skb;
}
+static int genelink_bind (struct usbnet *dev, struct usb_interface *intf)
+{
+ dev->hard_mtu = GL_RCV_BUF_SIZE;
+ dev->net->hard_header_len += 4;
+ return 0;
+}
+
static const struct driver_info genelink_info = {
.description = "Genesys GeneLink",
.flags = FLAG_FRAMING_GL | FLAG_NO_SETINT,
+ .bind = genelink_bind,
.rx_fixup = genelink_rx_fixup,
.tx_fixup = genelink_tx_fixup,
*
*-------------------------------------------------------------------------*/
-#define dev_packet_id data[0]
#define frame_errors data[1]
/*
#define MIN_FRAMED FRAMED_SIZE(0)
+/* packets _could_ be up to 64KB... */
+#define NC_MAX_PACKET 32767
+
/*
* Zero means no timeout; else, how long a 64 byte bulk packet may be queued
static int net1080_rx_fixup (struct usbnet *dev, struct sk_buff *skb)
{
struct nc_header *header;
+ struct net_device *net = dev->net;
struct nc_trailer *trailer;
u16 hdr_len, packet_len;
- if (!(skb->len & 0x01)
- || MIN_FRAMED > skb->len
- || skb->len > FRAMED_SIZE (dev->net->mtu)) {
+ if (!(skb->len & 0x01)) {
dev->stats.rx_frame_errors++;
dbg ("rx framesize %d range %d..%d mtu %d", skb->len,
- (int)MIN_FRAMED, (int)FRAMED_SIZE (dev->net->mtu),
- dev->net->mtu);
+ net->hard_header_len, dev->hard_mtu, net->mtu);
nc_ensure_sync (dev);
return 0;
}
header = (struct nc_header *) skb->data;
hdr_len = le16_to_cpup (&header->hdr_len);
packet_len = le16_to_cpup (&header->packet_len);
- if (FRAMED_SIZE (packet_len) > MAX_PACKET) {
+ if (FRAMED_SIZE (packet_len) > NC_MAX_PACKET) {
dev->stats.rx_frame_errors++;
dbg ("packet too big, %d", packet_len);
nc_ensure_sync (dev);
return skb2;
}
+static int net1080_bind (struct usbnet *dev, struct usb_interface *intf)
+{
+ unsigned extra = sizeof (struct nc_header)
+ + 1
+ + sizeof (struct nc_trailer);
+
+ dev->net->hard_header_len += extra;
+ dev->hard_mtu = NC_MAX_PACKET;
+ return 0;
+}
+
static const struct driver_info net1080_info = {
.description = "NetChip TurboCONNECT",
.flags = FLAG_FRAMING_NC,
+ .bind = net1080_bind,
.reset = net1080_reset,
- .check_connect =net1080_check_connect,
+ .check_connect = net1080_check_connect,
.rx_fixup = net1080_rx_fixup,
.tx_fixup = net1080_tx_fixup,
};
return skb;
}
+static int zaurus_bind (struct usbnet *dev, struct usb_interface *intf)
+{
+ /* Belcarra's funky framing has other options; mostly
+ * TRAILERS (!) with 4 bytes CRC, and maybe 2 pad bytes.
+ */
+ dev->net->hard_header_len += 6;
+ return generic_cdc_bind(dev, intf);
+}
+
static const struct driver_info zaurus_sl5x00_info = {
.description = "Sharp Zaurus SL-5x00",
.flags = FLAG_FRAMING_Z,
.check_connect = always_connected,
- .bind = generic_cdc_bind,
+ .bind = zaurus_bind,
.unbind = cdc_unbind,
.tx_fixup = zaurus_tx_fixup,
};
.description = "Sharp Zaurus, PXA-2xx based",
.flags = FLAG_FRAMING_Z,
.check_connect = always_connected,
- .bind = generic_cdc_bind,
+ .bind = zaurus_bind,
.unbind = cdc_unbind,
.tx_fixup = zaurus_tx_fixup,
};
.description = "Olympus R1000",
.flags = FLAG_FRAMING_Z,
.check_connect = always_connected,
- .bind = generic_cdc_bind,
+ .bind = zaurus_bind,
.unbind = cdc_unbind,
.tx_fixup = zaurus_tx_fixup,
};
static int usbnet_change_mtu (struct net_device *net, int new_mtu)
{
struct usbnet *dev = netdev_priv(net);
+ int ll_mtu = new_mtu + net->hard_header_len;
- if (new_mtu <= MIN_PACKET || new_mtu > MAX_PACKET)
- return -EINVAL;
-#ifdef CONFIG_USB_NET1080
- if (((dev->driver_info->flags) & FLAG_FRAMING_NC)) {
- if (FRAMED_SIZE (new_mtu) > MAX_PACKET)
- return -EINVAL;
- }
-#endif
-#ifdef CONFIG_USB_GENESYS
- if (((dev->driver_info->flags) & FLAG_FRAMING_GL)
- && new_mtu > GL_MAX_PACKET_LEN)
+ if (new_mtu <= 0 || ll_mtu > dev->hard_mtu)
return -EINVAL;
-#endif
// no second zero-length packet read wanted after mtu-sized packets
- if (((new_mtu + sizeof (struct ethhdr)) % dev->maxpacket) == 0)
+ if ((ll_mtu % dev->maxpacket) == 0)
return -EDOM;
net->mtu = new_mtu;
return 0;
unsigned long lockflags;
size_t size;
-#ifdef CONFIG_USB_NET1080
- if (dev->driver_info->flags & FLAG_FRAMING_NC)
- size = FRAMED_SIZE (dev->net->mtu);
- else
-#endif
-#ifdef CONFIG_USB_GENESYS
- if (dev->driver_info->flags & FLAG_FRAMING_GL)
- size = GL_RCV_BUF_SIZE;
- else
-#endif
-#ifdef CONFIG_USB_ZAURUS
- if (dev->driver_info->flags & FLAG_FRAMING_Z)
- size = 6 + (sizeof (struct ethhdr) + dev->net->mtu);
- else
-#endif
-#ifdef CONFIG_USB_RNDIS
- if (dev->driver_info->flags & FLAG_FRAMING_RN)
- size = RNDIS_MAX_TRANSFER;
- else
-#endif
-#ifdef CONFIG_USB_AX8817X
- if (dev->driver_info->flags & FLAG_FRAMING_AX)
- size = 2048;
- else
-#endif
- size = (sizeof (struct ethhdr) + dev->net->mtu);
-
+ size = max(dev->net->hard_header_len + dev->net->mtu,
+ (unsigned)ETH_FRAME_LEN);
if ((skb = alloc_skb (size + NET_IP_ALIGN, flags)) == NULL) {
if (netif_msg_rx_err (dev))
devdbg (dev, "no rx skb");
switch (urb_status) {
// success
case 0:
- if (MIN_PACKET > skb->len || skb->len > MAX_PACKET) {
+ if (skb->len < dev->net->hard_header_len) {
entry->state = rx_cleanup;
dev->stats.rx_errors++;
dev->stats.rx_length_errors++;
{
struct usbnet *dev = netdev_priv(net);
- /* If a check_connect is defined, return it's results */
+ /* If a check_connect is defined, return its result */
if (dev->driver_info->check_connect)
return dev->driver_info->check_connect (dev) == 0;
- /* Otherwise, we're up to avoid breaking scripts */
+ /* Otherwise, say we're up (to avoid breaking scripts) */
return 1;
}
if (test_bit (EVENT_TX_HALT, &dev->flags)) {
unlink_urbs (dev, &dev->txq);
status = usb_clear_halt (dev->udev, dev->out);
- if (status < 0 && status != -EPIPE) {
+ if (status < 0
+ && status != -EPIPE
+ && status != -ESHUTDOWN) {
if (netif_msg_tx_err (dev))
deverr (dev, "can't clear tx halt, status %d",
status);
} else {
clear_bit (EVENT_TX_HALT, &dev->flags);
- netif_wake_queue (dev->net);
+ if (status != -ESHUTDOWN)
+ netif_wake_queue (dev->net);
}
}
if (test_bit (EVENT_RX_HALT, &dev->flags)) {
unlink_urbs (dev, &dev->rxq);
status = usb_clear_halt (dev->udev, dev->in);
- if (status < 0 && status != -EPIPE) {
+ if (status < 0
+ && status != -EPIPE
+ && status != -ESHUTDOWN) {
if (netif_msg_rx_err (dev))
deverr (dev, "can't clear rx halt, status %d",
status);
#ifdef CONFIG_USB_NET1080
if (info->flags & FLAG_FRAMING_NC) {
- header->packet_id = cpu_to_le16 ((u16)dev->dev_packet_id++);
+ header->packet_id = cpu_to_le16 ((u16)dev->xid++);
put_unaligned (header->packet_id, &trailer->packet_id);
#if 0
devdbg (dev, "frame >tx h %d p %d id %d",
dev->net = net;
strcpy (net->name, "usb%d");
memcpy (net->dev_addr, node_id, sizeof node_id);
+ dev->hard_mtu = net->mtu + net->hard_header_len;
#if 0
// dma_supported() is deeply broken on almost all architectures
if ((dev->driver_info->flags & FLAG_ETHER) != 0
&& (net->dev_addr [0] & 0x02) == 0)
strcpy (net->name, "eth%d");
+
+ /* maybe the remote can't receive an Ethernet MTU */
+ if (net->mtu > (dev->hard_mtu - net->hard_header_len))
+ net->mtu = dev->hard_mtu - net->hard_header_len;
} else if (!info->in || info->out)
status = get_endpoints (dev, udev);
else {
status = 0;
}
-
if (status == 0 && dev->status)
status = init_status (dev, udev);
if (status < 0)
/*-------------------------------------------------------------------------*/
-static int __init usbnet_init (void)
+static int __init usbnet_init(void)
{
// compiler should optimize these out
BUG_ON (sizeof (((struct sk_buff *)0)->cb)
return usb_register(&usbnet_driver);
}
-module_init (usbnet_init);
+module_init(usbnet_init);
-static void __exit usbnet_exit (void)
+static void __exit usbnet_exit(void)
{
- usb_deregister (&usbnet_driver);
+ usb_deregister(&usbnet_driver);
}
-module_exit (usbnet_exit);
+module_exit(usbnet_exit);
-MODULE_AUTHOR ("David Brownell <dbrownell@users.sourceforge.net>");
-MODULE_DESCRIPTION ("USB Host-to-Host Link Drivers (numerous vendors)");
-MODULE_LICENSE ("GPL");
+MODULE_AUTHOR("David Brownell");
+MODULE_DESCRIPTION("USB Host-to-Host Link Drivers (numerous vendors)");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * USB Networking Link Interface
+ *
+ * Copyright (C) 2000-2005 by David Brownell <dbrownell@users.sourceforge.net>
+ * Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+
+#ifndef __USBNET_H
+#define __USBNET_H
+
+
+/* interface from usbnet core to each USB networking device we handle */
+struct usbnet {
+ /* housekeeping */
+ struct usb_device *udev;
+ struct driver_info *driver_info;
+ wait_queue_head_t *wait;
+
+ /* i/o info: pipes etc */
+ unsigned in, out;
+ struct usb_host_endpoint *status;
+ unsigned maxpacket;
+ struct timer_list delay;
+
+ /* protocol/interface state */
+ struct net_device *net;
+ struct net_device_stats stats;
+ int msg_enable;
+ unsigned long data [5];
+ u32 xid;
+ u32 hard_mtu; /* count any extra framing */
+ struct mii_if_info mii;
+
+ /* various kinds of pending driver work */
+ struct sk_buff_head rxq;
+ struct sk_buff_head txq;
+ struct sk_buff_head done;
+ struct urb *interrupt;
+ struct tasklet_struct bh;
+
+ struct work_struct kevent;
+ unsigned long flags;
+# define EVENT_TX_HALT 0
+# define EVENT_RX_HALT 1
+# define EVENT_RX_MEMORY 2
+# define EVENT_STS_SPLIT 3
+# define EVENT_LINK_RESET 4
+};
+
+
+/* interface from the device/framing level "minidriver" to core */
+struct driver_info {
+ char *description;
+
+ int flags;
+/* framing is CDC Ethernet, not writing ZLPs (hw issues), or optionally: */
+#define FLAG_FRAMING_NC 0x0001 /* guard against device dropouts */
+#define FLAG_FRAMING_GL 0x0002 /* genelink batches packets */
+#define FLAG_FRAMING_Z 0x0004 /* zaurus adds a trailer */
+#define FLAG_FRAMING_RN 0x0008 /* RNDIS batches, plus huge header */
+
+#define FLAG_NO_SETINT 0x0010 /* device can't set_interface() */
+#define FLAG_ETHER 0x0020 /* maybe use "eth%d" names */
+
+#define FLAG_FRAMING_AX 0x0040 /* AX88772/178 packets */
+
+ /* init device ... can sleep, or cause probe() failure */
+ int (*bind)(struct usbnet *, struct usb_interface *);
+
+ /* cleanup device ... can sleep, but can't fail */
+ void (*unbind)(struct usbnet *, struct usb_interface *);
+
+ /* reset device ... can sleep */
+ int (*reset)(struct usbnet *);
+
+ /* see if peer is connected ... can sleep */
+ int (*check_connect)(struct usbnet *);
+
+ /* for status polling */
+ void (*status)(struct usbnet *, struct urb *);
+
+ /* link reset handling, called from defer_kevent */
+ int (*link_reset)(struct usbnet *);
+
+ /* fixup rx packet (strip framing) */
+ int (*rx_fixup)(struct usbnet *dev, struct sk_buff *skb);
+
+ /* fixup tx packet (add framing) */
+ struct sk_buff *(*tx_fixup)(struct usbnet *dev,
+ struct sk_buff *skb, unsigned flags);
+
+ /* for new devices, use the descriptor-reading code instead */
+ int in; /* rx endpoint */
+ int out; /* tx endpoint */
+
+ unsigned long data; /* Misc driver specific data */
+};
+
+
+/* we record the state for each of our queued skbs */
+enum skb_state {
+ illegal = 0,
+ tx_start, tx_done,
+ rx_start, rx_done, rx_cleanup
+};
+
+struct skb_data { /* skb->cb is one of these */
+ struct urb *urb;
+ struct usbnet *dev;
+ enum skb_state state;
+ size_t length;
+};
+
+
+
+/* messaging support includes the interface name, so it must not be
+ * used before it has one ... notably, in minidriver bind() calls.
+ */
+#ifdef DEBUG
+#define devdbg(usbnet, fmt, arg...) \
+ printk(KERN_DEBUG "%s: " fmt "\n" , (usbnet)->net->name , ## arg)
+#else
+#define devdbg(usbnet, fmt, arg...) do {} while(0)
+#endif
+
+#define deverr(usbnet, fmt, arg...) \
+ printk(KERN_ERR "%s: " fmt "\n" , (usbnet)->net->name , ## arg)
+#define devwarn(usbnet, fmt, arg...) \
+ printk(KERN_WARNING "%s: " fmt "\n" , (usbnet)->net->name , ## arg)
+
+#define devinfo(usbnet, fmt, arg...) \
+ printk(KERN_INFO "%s: " fmt "\n" , (usbnet)->net->name , ## arg); \
+
+
+#endif /* __USBNET_H */
projects / linux-2.6 / commitdiff