/*
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* USB Network driver infrastructure
|
* Copyright (C) 2000-2005 by David Brownell
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* Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>
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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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
*/
|
|
/*
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* This is a generic "USB networking" framework that works with several
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* kinds of full and high speed networking devices: host-to-host cables,
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* smart usb peripherals, and actual Ethernet adapters.
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*
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* These devices usually differ in terms of control protocols (if they
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* even have one!) and sometimes they define new framing to wrap or batch
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* Ethernet packets. Otherwise, they talk to USB pretty much the same,
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* so interface (un)binding, endpoint I/O queues, fault handling, and other
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* issues can usefully be addressed by this framework.
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*/
|
|
/* error path messages, extra info */
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#define DEBUG
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/* more; success messages */
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/* #define VERBOSE */
|
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/ctype.h>
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#include <linux/ethtool.h>
|
#include <linux/workqueue.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>*/
|
|
#include "asix.h"
|
#include "axusbnet.h"
|
|
#define DRIVER_VERSION "22-Aug-2005"
|
|
static void axusbnet_unlink_rx_urbs(struct usbnet *);
|
|
static void
|
ax8817x_write_cmd_async(struct usbnet *dev, u8 cmd, u16 value, u16 index,
|
u16 size, void *data);
|
|
/*-------------------------------------------------------------------------*/
|
|
/*
|
* Nineteen USB 1.1 max size bulk transactions per frame (ms), max.
|
* Several dozen bytes of IPv4 data can fit in two such transactions.
|
* 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_MAX_QUEUE_MEMORY (60 * 1518)
|
#define RX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? \
|
(RX_MAX_QUEUE_MEMORY/(dev)->rx_urb_size) : 4)
|
#define TX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? \
|
(RX_MAX_QUEUE_MEMORY/(dev)->hard_mtu) : 4)
|
|
/* reawaken network queue this soon after stopping; else watchdog barks */
|
/* #define TX_TIMEOUT_JIFFIES (5 * HZ) */
|
#define TX_TIMEOUT_JIFFIES (30 * HZ)
|
|
/* throttle rx/tx briefly after some faults, so khubd might disconnect() */
|
/* us (it polls at HZ/4 usually) before we report too many false errors. */
|
#define THROTTLE_JIFFIES (HZ / 8)
|
|
/* between wakeups */
|
#define UNLINK_TIMEOUT_MS 3
|
|
/*-------------------------------------------------------------------------*/
|
|
static const char driver_name[] = "axusbnet";
|
|
/* use ethtool to change the level for any given device */
|
static int msg_level = -1;
|
module_param(msg_level, int, 0);
|
MODULE_PARM_DESC(msg_level, "Override default message level");
|
|
/*-------------------------------------------------------------------------*/
|
|
/* handles CDC Ethernet and many other network "bulk data" interfaces */
|
static
|
int axusbnet_get_endpoints(struct usbnet *dev, struct usb_interface *intf)
|
{
|
int tmp;
|
struct usb_host_interface *alt = NULL;
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struct usb_host_endpoint *in = NULL, *out = NULL;
|
struct usb_host_endpoint *status = NULL;
|
|
for (tmp = 0; tmp < intf->num_altsetting; tmp++) {
|
unsigned ep;
|
|
in = out = status = NULL;
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alt = intf->altsetting + tmp;
|
|
/* take the first altsetting with in-bulk + out-bulk;
|
* remember any status endpoint, just in case;
|
* ignore other endpoints and altsetttings.
|
*/
|
for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) {
|
struct usb_host_endpoint *e;
|
int intr = 0;
|
|
e = alt->endpoint + ep;
|
switch (e->desc.bmAttributes) {
|
case USB_ENDPOINT_XFER_INT:
|
if (!(e->desc.bEndpointAddress & USB_DIR_IN))
|
continue;
|
intr = 1;
|
/* FALLTHROUGH */
|
case USB_ENDPOINT_XFER_BULK:
|
break;
|
default:
|
continue;
|
}
|
if (e->desc.bEndpointAddress & USB_DIR_IN) {
|
if (!intr && !in) {
|
in = e;
|
} else if (intr && !status) {
|
status = e;
|
}
|
} else {
|
if (!out) {
|
out = e;
|
}
|
}
|
}
|
if (in && out)
|
break;
|
}
|
if (!alt || !in || !out)
|
return -EINVAL;
|
|
if (alt->desc.bAlternateSetting != 0
|
|| !(dev->driver_info->flags & FLAG_NO_SETINT)) {
|
tmp = usb_set_interface(dev->udev, alt->desc.bInterfaceNumber,
|
alt->desc.bAlternateSetting);
|
if (tmp < 0)
|
return tmp;
|
}
|
|
dev->in = usb_rcvbulkpipe(dev->udev,
|
in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
|
dev->out = usb_sndbulkpipe(dev->udev,
|
out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
|
dev->status = status;
|
return 0;
|
}
|
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)
|
static void intr_complete(struct urb *urb, struct pt_regs *regs);
|
#else
|
static void intr_complete(struct urb *urb);
|
#endif
|
|
static int init_status(struct usbnet *dev, struct usb_interface *intf)
|
{
|
char *buf = NULL;
|
unsigned pipe = 0;
|
unsigned maxp;
|
unsigned period;
|
|
if (!dev->driver_info->status)
|
return 0;
|
|
pipe = usb_rcvintpipe(dev->udev,
|
dev->status->desc.bEndpointAddress
|
& USB_ENDPOINT_NUMBER_MASK);
|
maxp = usb_maxpacket(dev->udev, pipe, 0);
|
|
/* avoid 1 msec chatter: min 8 msec poll rate */
|
period = max((int) dev->status->desc.bInterval,
|
(dev->udev->speed == USB_SPEED_HIGH) ? 7 : 3);
|
|
buf = kmalloc(maxp, GFP_KERNEL);
|
if (buf) {
|
dev->interrupt = usb_alloc_urb(0, GFP_KERNEL);
|
if (!dev->interrupt) {
|
kfree(buf);
|
return -ENOMEM;
|
} else {
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 14)
|
dev->interrupt->transfer_flags |= URB_ASYNC_UNLINK;
|
#endif
|
usb_fill_int_urb(dev->interrupt, dev->udev, pipe,
|
buf, maxp, intr_complete, dev, period);
|
devdbg(dev,
|
"status ep%din, %d bytes period %d",
|
usb_pipeendpoint(pipe), maxp, period);
|
}
|
}
|
return 0;
|
}
|
|
/* Passes this packet up the stack, updating its accounting.
|
* Some link protocols batch packets, so their rx_fixup paths
|
* can return clones as well as just modify the original skb.
|
*/
|
static
|
void axusbnet_skb_return(struct usbnet *dev, struct sk_buff *skb)
|
{
|
int status;
|
|
skb->dev = dev->net;
|
skb->protocol = eth_type_trans(skb, dev->net);
|
dev->stats.rx_packets++;
|
dev->stats.rx_bytes += skb->len;
|
|
if (netif_msg_rx_status(dev))
|
devdbg(dev, "< rx, len %zu, type 0x%x",
|
skb->len + sizeof(struct ethhdr), skb->protocol);
|
memset(skb->cb, 0, sizeof(struct skb_data));
|
status = netif_rx(skb);
|
if (status != NET_RX_SUCCESS && netif_msg_rx_err(dev))
|
devdbg(dev, "netif_rx status %d", status);
|
}
|
|
/*-------------------------------------------------------------------------
|
*
|
* Network Device Driver (peer link to "Host Device", from USB host)
|
*
|
*-------------------------------------------------------------------------*/
|
|
static
|
int axusbnet_change_mtu(struct net_device *net, int new_mtu)
|
{
|
struct usbnet *dev = netdev_priv(net);
|
int ll_mtu = new_mtu + net->hard_header_len;
|
int old_hard_mtu = dev->hard_mtu;
|
int old_rx_urb_size = dev->rx_urb_size;
|
|
if (new_mtu <= 0)
|
return -EINVAL;
|
/* no second zero-length packet read wanted after mtu-sized packets */
|
if ((ll_mtu % dev->maxpacket) == 0)
|
return -EDOM;
|
net->mtu = new_mtu;
|
|
dev->hard_mtu = net->mtu + net->hard_header_len;
|
if (dev->rx_urb_size == old_hard_mtu) {
|
dev->rx_urb_size = dev->hard_mtu;
|
if (dev->rx_urb_size > old_rx_urb_size)
|
axusbnet_unlink_rx_urbs(dev);
|
}
|
|
return 0;
|
}
|
|
static struct net_device_stats *axusbnet_get_stats(struct net_device *net)
|
{
|
struct usbnet *dev = netdev_priv(net);
|
return &dev->stats;
|
}
|
|
/*-------------------------------------------------------------------------*/
|
|
/* some LK 2.4 HCDs oopsed if we freed or resubmitted urbs from
|
* completion callbacks. 2.5 should have fixed those bugs...
|
*/
|
|
static enum skb_state defer_bh(struct usbnet *dev, struct sk_buff *skb,
|
struct sk_buff_head *list, enum skb_state state)
|
{
|
unsigned long flags;
|
enum skb_state old_state;
|
struct skb_data *entry = (struct skb_data *) skb->cb;
|
|
spin_lock_irqsave(&list->lock, flags);
|
old_state = entry->state;
|
entry->state = state;
|
__skb_unlink(skb, list);
|
|
/* defer_bh() is never called with list == &dev->done.
|
* spin_lock_nested() tells lockdep that it is OK to take
|
* dev->done.lock here with list->lock held.
|
*/
|
spin_lock_nested(&dev->done.lock, SINGLE_DEPTH_NESTING);
|
|
__skb_queue_tail(&dev->done, skb);
|
if (dev->done.qlen == 1)
|
tasklet_schedule(&dev->bh);
|
|
spin_unlock(&dev->done.lock);
|
spin_unlock_irqrestore(&list->lock, flags);
|
|
return old_state;
|
}
|
|
/* some work can't be done in tasklets, so we use keventd
|
*
|
* NOTE: annoying asymmetry: if it's active, schedule_work() fails,
|
* but tasklet_schedule() doesn't. hope the failure is rare.
|
*/
|
static
|
void axusbnet_defer_kevent(struct usbnet *dev, int work)
|
{
|
set_bit(work, &dev->flags);
|
if (!schedule_work(&dev->kevent))
|
deverr(dev, "kevent %d may have been dropped", work);
|
else
|
devdbg(dev, "kevent %d scheduled", work);
|
}
|
|
/*-------------------------------------------------------------------------*/
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)
|
static void rx_complete(struct urb *urb, struct pt_regs *regs);
|
#else
|
static void rx_complete(struct urb *urb);
|
#endif
|
|
static void rx_submit(struct usbnet *dev, struct urb *urb, gfp_t flags)
|
{
|
struct sk_buff *skb;
|
struct skb_data *entry;
|
int retval = 0;
|
unsigned long lockflags;
|
size_t size = dev->rx_urb_size;
|
struct driver_info *info = dev->driver_info;
|
u8 align;
|
|
/* prevent rx skb allocation when error ratio is high */
|
if (test_bit(EVENT_RX_KILL, &dev->flags)) {
|
usb_free_urb(urb);
|
return;
|
}
|
|
#if (AX_FORCE_BUFF_ALIGN)
|
align = 0;
|
#else
|
if (!(info->flags & FLAG_HW_IP_ALIGNMENT))
|
align = NET_IP_ALIGN;
|
else
|
align = 0;
|
#endif
|
skb = alloc_skb(size + align, flags);
|
if (skb == NULL) {
|
|
if (netif_msg_rx_err(dev))
|
devdbg(dev, "no rx skb");
|
|
if ((dev->rx_urb_size > 2048) && dev->rx_size) {
|
dev->rx_size--;
|
dev->rx_urb_size =
|
AX88772B_BULKIN_SIZE[dev->rx_size].size;
|
|
ax8817x_write_cmd_async(dev, 0x2A,
|
AX88772B_BULKIN_SIZE[dev->rx_size].byte_cnt,
|
AX88772B_BULKIN_SIZE[dev->rx_size].threshold,
|
0, NULL);
|
}
|
|
if (!(dev->flags & EVENT_RX_MEMORY))
|
axusbnet_defer_kevent(dev, EVENT_RX_MEMORY);
|
usb_free_urb(urb);
|
return;
|
}
|
|
if (align)
|
skb_reserve(skb, NET_IP_ALIGN);
|
|
entry = (struct skb_data *) skb->cb;
|
entry->urb = urb;
|
entry->dev = dev;
|
entry->state = rx_start;
|
entry->length = 0;
|
|
usb_fill_bulk_urb(urb, dev->udev, dev->in, skb->data,
|
size, rx_complete, skb);
|
|
spin_lock_irqsave(&dev->rxq.lock, lockflags);
|
|
if (netif_running(dev->net)
|
&& netif_device_present(dev->net)
|
&& !test_bit(EVENT_RX_HALT, &dev->flags)) {
|
switch (retval = usb_submit_urb(urb, GFP_ATOMIC)) {
|
case -EPIPE:
|
axusbnet_defer_kevent(dev, EVENT_RX_HALT);
|
break;
|
case -ENOMEM:
|
axusbnet_defer_kevent(dev, EVENT_RX_MEMORY);
|
break;
|
case -ENODEV:
|
if (netif_msg_ifdown(dev))
|
devdbg(dev, "device gone");
|
netif_device_detach(dev->net);
|
break;
|
default:
|
if (netif_msg_rx_err(dev))
|
devdbg(dev, "rx submit, %d", retval);
|
tasklet_schedule(&dev->bh);
|
break;
|
case 0:
|
__skb_queue_tail(&dev->rxq, skb);
|
}
|
} else {
|
if (netif_msg_ifdown(dev))
|
devdbg(dev, "rx: stopped");
|
retval = -ENOLINK;
|
}
|
spin_unlock_irqrestore(&dev->rxq.lock, lockflags);
|
if (retval) {
|
dev_kfree_skb_any(skb);
|
usb_free_urb(urb);
|
}
|
}
|
|
|
/*-------------------------------------------------------------------------*/
|
|
static inline void rx_process(struct usbnet *dev, struct sk_buff *skb)
|
{
|
if (dev->driver_info->rx_fixup
|
&& !dev->driver_info->rx_fixup(dev, skb))
|
goto error;
|
/* else network stack removes extra byte if we forced a short packet */
|
|
if (skb->len)
|
axusbnet_skb_return(dev, skb);
|
else {
|
if (netif_msg_rx_err(dev))
|
devdbg(dev, "drop");
|
error:
|
dev->stats.rx_errors++;
|
skb_queue_tail(&dev->done, skb);
|
}
|
}
|
|
/*-------------------------------------------------------------------------*/
|
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)
|
static void rx_complete(struct urb *urb, struct pt_regs *regs)
|
#else
|
static void rx_complete(struct urb *urb)
|
#endif
|
{
|
struct sk_buff *skb = (struct sk_buff *) urb->context;
|
struct skb_data *entry = (struct skb_data *) skb->cb;
|
struct usbnet *dev = entry->dev;
|
int urb_status = urb->status;
|
enum skb_state state;
|
|
skb_put(skb, urb->actual_length);
|
state = rx_done;
|
entry->urb = NULL;
|
|
switch (urb_status) {
|
/* success */
|
case 0:
|
if (skb->len < dev->net->hard_header_len) {
|
entry->state = rx_cleanup;
|
dev->stats.rx_errors++;
|
dev->stats.rx_length_errors++;
|
if (netif_msg_rx_err(dev))
|
devdbg(dev, "rx length %d", skb->len);
|
}
|
break;
|
|
/* stalls need manual reset. this is rare ... except that
|
* when going through USB 2.0 TTs, unplug appears this way.
|
* we avoid the highspeed version of the ETIMEDOUT/EILSEQ
|
* storm, recovering as needed.
|
*/
|
case -EPIPE:
|
dev->stats.rx_errors++;
|
axusbnet_defer_kevent(dev, EVENT_RX_HALT);
|
/* FALLTHROUGH */
|
|
/* software-driven interface shutdown */
|
case -ECONNRESET: /* async unlink */
|
case -ESHUTDOWN: /* hardware gone */
|
if (netif_msg_ifdown(dev))
|
devdbg(dev, "rx shutdown, code %d", urb_status);
|
goto block;
|
|
/* we get controller i/o faults during khubd disconnect() delays.
|
* throttle down resubmits, to avoid log floods; just temporarily,
|
* so we still recover when the fault isn't a khubd delay.
|
*/
|
case -EPROTO:
|
case -ETIME:
|
case -EILSEQ:
|
dev->stats.rx_errors++;
|
if (!timer_pending(&dev->delay)) {
|
mod_timer(&dev->delay, jiffies + THROTTLE_JIFFIES);
|
if (netif_msg_link(dev))
|
devdbg(dev, "rx throttle %d", urb_status);
|
}
|
block:
|
state = rx_cleanup;
|
entry->urb = urb;
|
urb = NULL;
|
break;
|
|
/* data overrun ... flush fifo? */
|
case -EOVERFLOW:
|
dev->stats.rx_over_errors++;
|
/* FALLTHROUGH */
|
|
default:
|
state = rx_cleanup;
|
dev->stats.rx_errors++;
|
if (netif_msg_rx_err(dev))
|
devdbg(dev, "rx status %d", urb_status);
|
break;
|
}
|
|
/* stop rx if packet error rate is high */
|
if (++dev->pkt_cnt > 30) {
|
dev->pkt_cnt = 0;
|
dev->pkt_err = 0;
|
} else {
|
if (state == rx_cleanup)
|
dev->pkt_err++;
|
if (dev->pkt_err > 20)
|
set_bit(EVENT_RX_KILL, &dev->flags);
|
}
|
|
state = defer_bh(dev, skb, &dev->rxq, state);
|
|
if (urb) {
|
if (netif_running(dev->net) &&
|
!test_bit(EVENT_RX_HALT, &dev->flags) &&
|
state != unlink_start) {
|
rx_submit(dev, urb, GFP_ATOMIC);
|
return;
|
}
|
usb_free_urb(urb);
|
}
|
if (netif_msg_rx_err(dev))
|
devdbg(dev, "no read resubmitted");
|
}
|
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)
|
static void intr_complete(struct urb *urb, struct pt_regs *regs)
|
#else
|
static void intr_complete(struct urb *urb)
|
#endif
|
{
|
struct usbnet *dev = urb->context;
|
int status = urb->status;
|
|
switch (status) {
|
/* success */
|
case 0:
|
dev->driver_info->status(dev, urb);
|
break;
|
|
/* software-driven interface shutdown */
|
case -ENOENT: /* urb killed */
|
case -ESHUTDOWN: /* hardware gone */
|
if (netif_msg_ifdown(dev))
|
devdbg(dev, "intr shutdown, code %d", status);
|
return;
|
|
/* NOTE: not throttling like RX/TX, since this endpoint
|
* already polls infrequently
|
*/
|
default:
|
devdbg(dev, "intr status %d", status);
|
break;
|
}
|
|
if (!netif_running(dev->net))
|
return;
|
|
memset(urb->transfer_buffer, 0, urb->transfer_buffer_length);
|
status = usb_submit_urb(urb, GFP_ATOMIC);
|
if (status != 0 && netif_msg_timer(dev))
|
deverr(dev, "intr resubmit --> %d", status);
|
}
|
|
/*-------------------------------------------------------------------------*/
|
|
/* unlink pending rx/tx; completion handlers do all other cleanup */
|
|
static int unlink_urbs (struct usbnet *dev, struct sk_buff_head *q)
|
{
|
unsigned long flags;
|
struct sk_buff *skb = NULL;
|
int count = 0;
|
|
spin_lock_irqsave (&q->lock, flags);
|
while (!skb_queue_empty(q)) {
|
struct skb_data *entry;
|
struct urb *urb;
|
int retval;
|
|
skb_queue_walk(q, skb) {
|
entry = (struct skb_data *) skb->cb;
|
if (entry->state != unlink_start)
|
goto found;
|
}
|
break;
|
found:
|
entry->state = unlink_start;
|
urb = entry->urb;
|
|
/*
|
* Get reference count of the URB to avoid it to be
|
* freed during usb_unlink_urb, which may trigger
|
* use-after-free problem inside usb_unlink_urb since
|
* usb_unlink_urb is always racing with .complete
|
* handler(include defer_bh).
|
*/
|
usb_get_urb(urb);
|
spin_unlock_irqrestore(&q->lock, flags);
|
// during some PM-driven resume scenarios,
|
// these (async) unlinks complete immediately
|
retval = usb_unlink_urb (urb);
|
if (retval != -EINPROGRESS && retval != 0)
|
printk(DEBUG "unlink urb err, %d\n", retval);
|
else
|
count++;
|
usb_put_urb(urb);
|
spin_lock_irqsave(&q->lock, flags);
|
}
|
spin_unlock_irqrestore (&q->lock, flags);
|
|
return count;
|
}
|
|
/* Flush all pending rx urbs */
|
/* minidrivers may need to do this when the MTU changes */
|
|
static
|
void axusbnet_unlink_rx_urbs(struct usbnet *dev)
|
{
|
if (netif_running(dev->net)) {
|
(void) unlink_urbs(dev, &dev->rxq);
|
tasklet_schedule(&dev->bh);
|
}
|
}
|
|
/*-------------------------------------------------------------------------*/
|
|
/* precondition: never called in_interrupt */
|
|
static
|
int axusbnet_stop(struct net_device *net)
|
{
|
struct usbnet *dev = netdev_priv(net);
|
struct driver_info *info = dev->driver_info;
|
|
#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18)
|
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(unlink_wakeup);
|
#else
|
DECLARE_WAIT_QUEUE_HEAD(unlink_wakeup);
|
#endif
|
DECLARE_WAITQUEUE(wait, current);
|
|
netif_stop_queue(net);
|
|
if (netif_msg_ifdown(dev))
|
devinfo(dev, "stop stats: rx/tx %ld/%ld, errs %ld/%ld",
|
dev->stats.rx_packets, dev->stats.tx_packets,
|
dev->stats.rx_errors, dev->stats.tx_errors);
|
|
/* allow minidriver to stop correctly (wireless devices to turn off
|
* radio etc) */
|
if (info->stop) {
|
int retval;
|
retval = info->stop(dev);
|
if (retval < 0 && netif_msg_ifdown(dev))
|
devinfo(dev,
|
"stop fail (%d) usbnet usb-%s-%s, %s",
|
retval,
|
dev->udev->bus->bus_name, dev->udev->devpath,
|
info->description);
|
}
|
|
if (!(info->flags & FLAG_AVOID_UNLINK_URBS)) {
|
int temp;
|
/* ensure there are no more active urbs */
|
add_wait_queue(&unlink_wakeup, &wait);
|
dev->wait = &unlink_wakeup;
|
temp = unlink_urbs(dev, &dev->txq) +
|
unlink_urbs(dev, &dev->rxq);
|
|
/* maybe wait for deletions to finish. */
|
while (!skb_queue_empty(&dev->rxq)
|
&& !skb_queue_empty(&dev->txq)
|
&& !skb_queue_empty(&dev->done)) {
|
msleep(UNLINK_TIMEOUT_MS);
|
if (netif_msg_ifdown(dev))
|
devdbg(dev, "waited for %d urb completions",
|
temp);
|
}
|
dev->wait = NULL;
|
remove_wait_queue(&unlink_wakeup, &wait);
|
}
|
|
usb_kill_urb(dev->interrupt);
|
|
/* deferred work (task, timer, softirq) must also stop.
|
* can't flush_scheduled_work() until we drop rtnl (later),
|
* else workers could deadlock; so make workers a NOP.
|
*/
|
dev->flags = 0;
|
del_timer_sync(&dev->delay);
|
tasklet_kill(&dev->bh);
|
|
return 0;
|
}
|
|
/*-------------------------------------------------------------------------*/
|
|
/* posts reads, and enables write queuing */
|
|
/* precondition: never called in_interrupt */
|
|
static
|
int axusbnet_open(struct net_device *net)
|
{
|
struct usbnet *dev = netdev_priv(net);
|
int retval = 0;
|
struct driver_info *info = dev->driver_info;
|
|
/* put into "known safe" state */
|
if (info->reset) {
|
retval = info->reset(dev);
|
if (retval < 0) {
|
if (netif_msg_ifup(dev))
|
devinfo(dev,
|
"open reset fail (%d) usbnet usb-%s-%s, %s",
|
retval,
|
dev->udev->bus->bus_name,
|
dev->udev->devpath,
|
info->description);
|
goto done;
|
}
|
}
|
|
/* insist peer be connected */
|
if (info->check_connect) {
|
retval = info->check_connect(dev);
|
if (retval < 0) {
|
if (netif_msg_ifup(dev))
|
devdbg(dev, "can't open; %d", retval);
|
goto done;
|
}
|
}
|
|
/* start any status interrupt transfer */
|
if (dev->interrupt) {
|
retval = usb_submit_urb(dev->interrupt, GFP_KERNEL);
|
if (retval < 0) {
|
if (netif_msg_ifup(dev))
|
deverr(dev, "intr submit %d", retval);
|
goto done;
|
}
|
}
|
|
/* reset rx error state */
|
dev->pkt_cnt = 0;
|
dev->pkt_err = 0;
|
clear_bit(EVENT_RX_KILL, &dev->flags);
|
|
netif_start_queue(net);
|
if (netif_msg_ifup(dev)) {
|
char *framing;
|
|
if (dev->driver_info->flags & FLAG_FRAMING_NC)
|
framing = "NetChip";
|
else if (dev->driver_info->flags & FLAG_FRAMING_GL)
|
framing = "GeneSys";
|
else if (dev->driver_info->flags & FLAG_FRAMING_Z)
|
framing = "Zaurus";
|
else if (dev->driver_info->flags & FLAG_FRAMING_RN)
|
framing = "RNDIS";
|
else if (dev->driver_info->flags & FLAG_FRAMING_AX)
|
framing = "ASIX";
|
else
|
framing = "simple";
|
|
devinfo(dev, "open: enable queueing (rx %d, tx %d) mtu %d %s framing",
|
(int)RX_QLEN(dev), (int)TX_QLEN(dev), dev->net->mtu,
|
framing);
|
}
|
|
/* delay posting reads until we're fully open */
|
tasklet_schedule(&dev->bh);
|
return retval;
|
done:
|
return retval;
|
}
|
|
/*-------------------------------------------------------------------------*/
|
|
/* ethtool methods; minidrivers may need to add some more, but
|
* they'll probably want to use this base set.
|
*/
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 20, 0)
|
static
|
int axusbnet_get_settings(struct net_device *net, struct ethtool_cmd *cmd)
|
{
|
struct usbnet *dev = netdev_priv(net);
|
|
if (!dev->mii.mdio_read)
|
return -EOPNOTSUPP;
|
|
return mii_ethtool_gset(&dev->mii, cmd);
|
}
|
|
static
|
int axusbnet_set_settings(struct net_device *net, struct ethtool_cmd *cmd)
|
{
|
struct usbnet *dev = netdev_priv(net);
|
int retval;
|
|
if (!dev->mii.mdio_write)
|
return -EOPNOTSUPP;
|
|
retval = mii_ethtool_sset(&dev->mii, cmd);
|
|
/* link speed/duplex might have changed */
|
if (dev->driver_info->link_reset)
|
dev->driver_info->link_reset(dev);
|
|
return retval;
|
|
}
|
#endif
|
static
|
u32 axusbnet_get_link(struct net_device *net)
|
{
|
struct usbnet *dev = netdev_priv(net);
|
|
/* If a check_connect is defined, return its result */
|
if (dev->driver_info->check_connect)
|
return dev->driver_info->check_connect(dev) == 0;
|
|
/* if the device has mii operations, use those */
|
if (dev->mii.mdio_read)
|
return mii_link_ok(&dev->mii);
|
|
/* Otherwise, dtrt for drivers calling netif_carrier_{on,off} */
|
return ethtool_op_get_link(net);
|
}
|
|
static
|
int axusbnet_nway_reset(struct net_device *net)
|
{
|
struct usbnet *dev = netdev_priv(net);
|
|
if (!dev->mii.mdio_write)
|
return -EOPNOTSUPP;
|
|
return mii_nway_restart(&dev->mii);
|
}
|
|
static
|
void axusbnet_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
|
{
|
struct usbnet *dev = netdev_priv(net);
|
|
strncpy(info->driver, dev->driver_name, sizeof(info->driver));
|
strncpy(info->version, DRIVER_VERSION, sizeof(info->version));
|
strncpy(info->fw_version, dev->driver_info->description,
|
sizeof(info->fw_version));
|
usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
|
}
|
|
static
|
u32 axusbnet_get_msglevel(struct net_device *net)
|
{
|
struct usbnet *dev = netdev_priv(net);
|
|
return dev->msg_enable;
|
}
|
|
static
|
void axusbnet_set_msglevel(struct net_device *net, u32 level)
|
{
|
struct usbnet *dev = netdev_priv(net);
|
|
dev->msg_enable = level;
|
}
|
|
/* drivers may override default ethtool_ops in their bind() routine */
|
static struct ethtool_ops axusbnet_ethtool_ops = {
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 20, 0)
|
.get_settings = axusbnet_get_settings,
|
.set_settings = axusbnet_set_settings,
|
#endif
|
.get_link = axusbnet_get_link,
|
.nway_reset = axusbnet_nway_reset,
|
.get_drvinfo = axusbnet_get_drvinfo,
|
.get_msglevel = axusbnet_get_msglevel,
|
.set_msglevel = axusbnet_set_msglevel,
|
};
|
|
/*-------------------------------------------------------------------------*/
|
|
/* work that cannot be done in interrupt context uses keventd.
|
*
|
* NOTE: with 2.5 we could do more of this using completion callbacks,
|
* especially now that control transfers can be queued.
|
*/
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
|
static void kevent(void *data)
|
{
|
struct usbnet *dev = (struct usbnet *)data;
|
#else
|
static void kevent(struct work_struct *work)
|
{
|
struct usbnet *dev =
|
container_of(work, struct usbnet, kevent);
|
#endif
|
int status;
|
|
/* usb_clear_halt() needs a thread context */
|
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
|
&& 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);
|
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
|
&& status != -ESHUTDOWN) {
|
if (netif_msg_rx_err(dev))
|
deverr(dev, "can't clear rx halt, status %d",
|
status);
|
} else {
|
clear_bit(EVENT_RX_HALT, &dev->flags);
|
tasklet_schedule(&dev->bh);
|
}
|
}
|
|
/* tasklet could resubmit itself forever if memory is tight */
|
if (test_bit(EVENT_RX_MEMORY, &dev->flags)) {
|
struct urb *urb = NULL;
|
|
if (netif_running(dev->net))
|
urb = usb_alloc_urb(0, GFP_KERNEL);
|
else
|
clear_bit(EVENT_RX_MEMORY, &dev->flags);
|
if (urb != NULL) {
|
clear_bit(EVENT_RX_MEMORY, &dev->flags);
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 14)
|
urb->transfer_flags |= URB_ASYNC_UNLINK;
|
#endif
|
rx_submit(dev, urb, GFP_KERNEL);
|
tasklet_schedule(&dev->bh);
|
}
|
}
|
|
if (test_bit(EVENT_LINK_RESET, &dev->flags)) {
|
struct driver_info *info = dev->driver_info;
|
|
clear_bit(EVENT_LINK_RESET, &dev->flags);
|
if (info->link_reset) {
|
int retval;
|
retval = info->link_reset(dev);
|
if (retval < 0) {
|
devinfo(dev,
|
"link reset failed (%d) usbnet usb-%s-%s, %s",
|
retval,
|
dev->udev->bus->bus_name,
|
dev->udev->devpath,
|
info->description);
|
}
|
}
|
}
|
|
if (dev->flags)
|
devdbg(dev, "kevent done, flags = 0x%lx", dev->flags);
|
}
|
|
/*-------------------------------------------------------------------------*/
|
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)
|
static void tx_complete(struct urb *urb, struct pt_regs *regs)
|
#else
|
static void tx_complete(struct urb *urb)
|
#endif
|
{
|
struct sk_buff *skb = (struct sk_buff *) urb->context;
|
struct skb_data *entry = (struct skb_data *) skb->cb;
|
struct usbnet *dev = entry->dev;
|
|
if (urb->status == 0) {
|
dev->stats.tx_packets++;
|
dev->stats.tx_bytes += entry->length;
|
} else {
|
dev->stats.tx_errors++;
|
|
switch (urb->status) {
|
case -EPIPE:
|
axusbnet_defer_kevent(dev, EVENT_TX_HALT);
|
break;
|
|
/* software-driven interface shutdown */
|
case -ECONNRESET: /* async unlink */
|
case -ESHUTDOWN: /* hardware gone */
|
break;
|
|
/* like rx, tx gets controller i/o faults during khubd delays */
|
/* and so it uses the same throttling mechanism. */
|
case -EPROTO:
|
case -ETIME:
|
case -EILSEQ:
|
if (!timer_pending(&dev->delay)) {
|
mod_timer(&dev->delay,
|
jiffies + THROTTLE_JIFFIES);
|
if (netif_msg_link(dev))
|
devdbg(dev, "tx throttle %d",
|
urb->status);
|
}
|
netif_stop_queue(dev->net);
|
break;
|
default:
|
if (netif_msg_tx_err(dev))
|
devdbg(dev, "tx err %d", entry->urb->status);
|
break;
|
}
|
}
|
|
urb->dev = NULL;
|
entry->state = tx_done;
|
(void) defer_bh(dev, skb, &dev->txq, tx_done);
|
}
|
|
/*-------------------------------------------------------------------------*/
|
|
static
|
void axusbnet_tx_timeout(struct net_device *net)
|
{
|
struct usbnet *dev = netdev_priv(net);
|
struct driver_info *info = dev->driver_info;
|
|
if (!(info->flags & FLAG_AVOID_UNLINK_URBS)) {
|
unlink_urbs(dev, &dev->txq);
|
}
|
tasklet_schedule(&dev->bh);
|
|
/* FIXME: device recovery -- reset? */
|
}
|
|
/*-------------------------------------------------------------------------*/
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 32)
|
static int
|
#else
|
static netdev_tx_t
|
#endif
|
axusbnet_start_xmit(struct sk_buff *skb, struct net_device *net)
|
{
|
struct usbnet *dev = netdev_priv(net);
|
int length;
|
struct urb *urb = NULL;
|
struct skb_data *entry;
|
struct driver_info *info = dev->driver_info;
|
unsigned long flags;
|
int retval;
|
|
/* some devices want funky USB-level framing, for */
|
/* win32 driver (usually) and/or hardware quirks */
|
if (info->tx_fixup) {
|
skb = info->tx_fixup(dev, skb, GFP_ATOMIC);
|
if (!skb) {
|
if (netif_msg_tx_err(dev))
|
devdbg(dev, "can't tx_fixup skb");
|
goto drop;
|
}
|
}
|
length = skb->len;
|
|
urb = usb_alloc_urb(0, GFP_ATOMIC);
|
if (!urb) {
|
if (netif_msg_tx_err(dev))
|
devdbg(dev, "no urb");
|
goto drop;
|
}
|
|
entry = (struct skb_data *) skb->cb;
|
entry->urb = urb;
|
entry->dev = dev;
|
entry->state = tx_start;
|
entry->length = length;
|
|
usb_fill_bulk_urb(urb, dev->udev, dev->out, skb->data,
|
skb->len, tx_complete, skb);
|
|
/* don't assume the hardware handles USB_ZERO_PACKET
|
* NOTE: strictly conforming cdc-ether devices should expect
|
* the ZLP here, but ignore the one-byte packet.
|
*/
|
if (!(info->flags & FLAG_SEND_ZLP) && (length % dev->maxpacket) == 0) {
|
urb->transfer_buffer_length++;
|
if (skb_tailroom(skb)) {
|
skb->data[skb->len] = 0;
|
__skb_put(skb, 1);
|
}
|
}
|
|
spin_lock_irqsave(&dev->txq.lock, flags);
|
|
switch ((retval = usb_submit_urb(urb, GFP_ATOMIC))) {
|
case -EPIPE:
|
netif_stop_queue(net);
|
axusbnet_defer_kevent(dev, EVENT_TX_HALT);
|
break;
|
default:
|
if (netif_msg_tx_err(dev))
|
devdbg(dev, "tx: submit urb err %d", retval);
|
break;
|
case 0:
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0)
|
net->trans_start = jiffies;
|
#else
|
netif_trans_update(net);
|
#endif
|
__skb_queue_tail(&dev->txq, skb);
|
if (dev->txq.qlen >= TX_QLEN(dev))
|
netif_stop_queue(net);
|
}
|
spin_unlock_irqrestore(&dev->txq.lock, flags);
|
|
if (retval) {
|
if (netif_msg_tx_err(dev))
|
devdbg(dev, "drop, code %d", retval);
|
drop:
|
dev->stats.tx_dropped++;
|
if (skb)
|
dev_kfree_skb_any(skb);
|
usb_free_urb(urb);
|
} else if (netif_msg_tx_queued(dev)) {
|
devdbg(dev, "> tx, len %d, type 0x%x",
|
length, skb->protocol);
|
}
|
return NETDEV_TX_OK;
|
}
|
|
/*-------------------------------------------------------------------------*/
|
|
/* tasklet (work deferred from completions, in_irq) or timer */
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
|
static void axusbnet_bh(unsigned long param)
|
#else
|
static void axusbnet_bh (struct timer_list *t)
|
#endif
|
{
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
|
struct usbnet *dev = (struct usbnet *) param;
|
#else
|
struct usbnet *dev = from_timer(dev, t, delay);
|
#endif
|
struct sk_buff *skb;
|
struct skb_data *entry = NULL;
|
|
while ((skb = skb_dequeue(&dev->done))) {
|
entry = (struct skb_data *) skb->cb;
|
switch (entry->state) {
|
case rx_done:
|
entry->state = rx_cleanup;
|
rx_process(dev, skb);
|
continue;
|
case tx_done:
|
case rx_cleanup:
|
usb_free_urb(entry->urb);
|
dev_kfree_skb(skb);
|
continue;
|
default:
|
devdbg(dev, "bogus skb state %d", entry->state);
|
}
|
}
|
|
/* restart RX again after disabling due to high error rate */
|
clear_bit(EVENT_RX_KILL, &dev->flags);
|
|
/* waiting for all pending urbs to complete? */
|
if (dev->wait) {
|
if ((dev->txq.qlen + dev->rxq.qlen + dev->done.qlen) == 0)
|
wake_up(dev->wait);
|
|
/* or are we maybe short a few urbs? */
|
} else if (netif_running(dev->net)
|
&& netif_device_present(dev->net)
|
&& !timer_pending(&dev->delay)
|
&& !test_bit(EVENT_RX_HALT, &dev->flags)) {
|
int temp = dev->rxq.qlen;
|
int qlen = RX_QLEN(dev);
|
|
if (temp < qlen) {
|
struct urb *urb = NULL;
|
int i;
|
|
/* don't refill the queue all at once */
|
for (i = 0; i < 10 && dev->rxq.qlen < qlen; i++) {
|
urb = usb_alloc_urb(0, GFP_ATOMIC);
|
if (urb != NULL) {
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 14)
|
urb->transfer_flags |= URB_ASYNC_UNLINK;
|
#endif
|
rx_submit(dev, urb, GFP_ATOMIC);
|
}
|
}
|
if (temp != dev->rxq.qlen && netif_msg_link(dev))
|
devdbg(dev, "rxqlen %d --> %d",
|
temp, dev->rxq.qlen);
|
if (dev->rxq.qlen < qlen)
|
tasklet_schedule(&dev->bh);
|
}
|
if (dev->txq.qlen < TX_QLEN(dev))
|
netif_wake_queue(dev->net);
|
}
|
}
|
|
|
/*-------------------------------------------------------------------------
|
*
|
* USB Device Driver support
|
*
|
*-------------------------------------------------------------------------*/
|
|
/* precondition: never called in_interrupt */
|
|
static
|
void axusbnet_disconnect(struct usb_interface *intf)
|
{
|
struct usbnet *dev;
|
struct usb_device *xdev;
|
struct net_device *net;
|
|
dev = usb_get_intfdata(intf);
|
usb_set_intfdata(intf, NULL);
|
if (!dev)
|
return;
|
|
xdev = interface_to_usbdev(intf);
|
|
if (netif_msg_probe(dev))
|
devinfo(dev, "unregister '%s' usb-%s-%s, %s",
|
intf->dev.driver->name,
|
xdev->bus->bus_name, xdev->devpath,
|
dev->driver_info->description);
|
|
net = dev->net;
|
unregister_netdev(net);
|
|
/* we don't hold rtnl here ... */
|
flush_scheduled_work();
|
|
if (dev->driver_info->unbind)
|
dev->driver_info->unbind(dev, intf);
|
|
free_netdev(net);
|
usb_put_dev(xdev);
|
}
|
|
/*-------------------------------------------------------------------------*/
|
|
/* precondition: never called in_interrupt */
|
|
static int
|
axusbnet_probe(struct usb_interface *udev, const struct usb_device_id *prod)
|
{
|
struct usbnet *dev;
|
struct net_device *net;
|
struct usb_host_interface *interface;
|
struct driver_info *info;
|
struct usb_device *xdev;
|
int status;
|
const char *name;
|
|
name = udev->dev.driver->name;
|
info = (struct driver_info *) prod->driver_info;
|
if (!info) {
|
printk(KERN_ERR "blacklisted by %s\n", name);
|
return -ENODEV;
|
}
|
xdev = interface_to_usbdev(udev);
|
interface = udev->cur_altsetting;
|
|
usb_get_dev(xdev);
|
|
status = -ENOMEM;
|
|
/* set up our own records */
|
net = alloc_etherdev(sizeof(*dev));
|
if (!net) {
|
printk(KERN_ERR "can't kmalloc dev");
|
goto out;
|
}
|
|
dev = netdev_priv(net);
|
dev->udev = xdev;
|
dev->intf = udev;
|
dev->driver_info = info;
|
dev->driver_name = name;
|
dev->msg_enable = netif_msg_init(msg_level, NETIF_MSG_DRV |
|
NETIF_MSG_PROBE | NETIF_MSG_LINK);
|
skb_queue_head_init(&dev->rxq);
|
skb_queue_head_init(&dev->txq);
|
skb_queue_head_init(&dev->done);
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
|
dev->bh.func = axusbnet_bh;
|
dev->bh.data = (unsigned long) dev;
|
#else
|
dev->bh.func = (void (*)(unsigned long))axusbnet_bh;
|
dev->bh.data = (unsigned long)&dev->delay;
|
#endif
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
|
INIT_WORK(&dev->kevent, kevent, dev);
|
#else
|
INIT_WORK(&dev->kevent, kevent);
|
#endif
|
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
|
dev->delay.function = axusbnet_bh;
|
dev->delay.data = (unsigned long) dev;
|
init_timer(&dev->delay);
|
#else
|
timer_setup(&dev->delay, axusbnet_bh, 0);
|
#endif
|
/* mutex_init(&dev->phy_mutex); */
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37)
|
init_MUTEX (&dev->sem);
|
#else
|
sema_init(&dev->sem,1);
|
#endif
|
dev->net = net;
|
|
/* rx and tx sides can use different message sizes;
|
* bind() should set rx_urb_size in that case.
|
*/
|
dev->hard_mtu = net->mtu + net->hard_header_len;
|
|
#if 0
|
/* dma_supported() is deeply broken on almost all architectures */
|
/* possible with some EHCI controllers */
|
if (dma_supported(&udev->dev, DMA_BIT_MASK(64)))
|
net->features |= NETIF_F_HIGHDMA;
|
#endif
|
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
|
net->open = axusbnet_open,
|
net->stop = axusbnet_stop,
|
net->hard_start_xmit = axusbnet_start_xmit,
|
net->tx_timeout = axusbnet_tx_timeout,
|
net->get_stats = axusbnet_get_stats;
|
#endif
|
|
net->watchdog_timeo = TX_TIMEOUT_JIFFIES;
|
net->ethtool_ops = &axusbnet_ethtool_ops;
|
|
/* allow device-specific bind/init procedures */
|
/* NOTE net->name still not usable ... */
|
status = info->bind(dev, udev);
|
if (status < 0) {
|
deverr(dev, "Binding device failed: %d", status);
|
goto out1;
|
}
|
|
/* 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;
|
|
status = init_status(dev, udev);
|
if (status < 0)
|
goto out3;
|
|
if (!dev->rx_urb_size)
|
dev->rx_urb_size = dev->hard_mtu;
|
dev->maxpacket = usb_maxpacket(dev->udev, dev->out, 1);
|
|
SET_NETDEV_DEV(net, &udev->dev);
|
status = register_netdev(net);
|
if (status) {
|
deverr(dev, "net device registration failed: %d", status);
|
goto out3;
|
}
|
|
if (netif_msg_probe(dev))
|
devinfo(dev, "register '%s' at usb-%s-%s, %s, %pM",
|
udev->dev.driver->name,
|
xdev->bus->bus_name, xdev->devpath,
|
dev->driver_info->description,
|
net->dev_addr);
|
|
/* ok, it's ready to go. */
|
usb_set_intfdata(udev, dev);
|
|
/* start as if the link is up */
|
netif_device_attach(net);
|
|
return 0;
|
|
out3:
|
if (info->unbind)
|
info->unbind(dev, udev);
|
out1:
|
free_netdev(net);
|
out:
|
usb_put_dev(xdev);
|
return status;
|
}
|
|
/*-------------------------------------------------------------------------*/
|
|
/*
|
* suspend the whole driver as soon as the first interface is suspended
|
* resume only when the last interface is resumed
|
*/
|
|
static int axusbnet_suspend(struct usb_interface *intf,
|
#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 10)
|
pm_message_t message)
|
#else
|
u32 message)
|
#endif
|
{
|
struct usbnet *dev = usb_get_intfdata(intf);
|
|
if (!dev->suspend_count++) {
|
/*
|
* accelerate emptying of the rx and queues, to avoid
|
* having everything error out.
|
*/
|
netif_device_detach(dev->net);
|
(void) unlink_urbs(dev, &dev->rxq);
|
(void) unlink_urbs(dev, &dev->txq);
|
usb_kill_urb(dev->interrupt);
|
/*
|
* reattach so runtime management can use and
|
* wake the device
|
*/
|
netif_device_attach(dev->net);
|
}
|
return 0;
|
}
|
|
static int
|
axusbnet_resume(struct usb_interface *intf)
|
{
|
struct usbnet *dev = usb_get_intfdata(intf);
|
int retval = 0;
|
|
if (!--dev->suspend_count)
|
tasklet_schedule(&dev->bh);
|
|
retval = init_status(dev, intf);
|
if (retval < 0)
|
return retval;
|
|
if (dev->interrupt) {
|
retval = usb_submit_urb(dev->interrupt, GFP_KERNEL);
|
if (retval < 0 && netif_msg_ifup(dev))
|
deverr(dev, "intr submit %d", retval);
|
}
|
|
return retval;
|
}
|
