patch-2.4.20 linux-2.4.20/drivers/usb/usbnet.c
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- Lines: 1058
- Date:
Thu Nov 28 15:53:15 2002
- Orig file:
linux-2.4.19/drivers/usb/usbnet.c
- Orig date:
Fri Aug 2 17:39:45 2002
diff -urN linux-2.4.19/drivers/usb/usbnet.c linux-2.4.20/drivers/usb/usbnet.c
@@ -1,6 +1,6 @@
/*
* USB Host-to-Host Links
- * Copyright (C) 2000-2001 by David Brownell <dbrownell@users.sourceforge.net>
+ * Copyright (C) 2000-2002 by David Brownell <dbrownell@users.sourceforge.net>
*/
/*
@@ -16,6 +16,7 @@
*
* - AnchorChip 2720
* - Belkin, eTEK (interops with Win32 drivers)
+ * - EPSON USB clients
* - GeneSys GL620USB-A
* - "Linux Devices" (like iPaq and similar SA-1100 based PDAs)
* - NetChip 1080 (interoperates with NetChip Win32 drivers)
@@ -23,33 +24,41 @@
*
* USB devices can implement their side of this protocol at the cost
* of two bulk endpoints; it's not restricted to "cable" applications.
- * See the LINUXDEV support.
+ * See the LINUXDEV or EPSON device/client support.
*
*
- * TODO:
+ * Status:
*
- * This needs to be retested for bulk queuing problems ... earlier versions
- * seemed to find different types of problems in each HCD. Once they're fixed,
- * re-enable queues to get higher bandwidth utilization (without needing
- * to tweak MTU for larger packets).
- *
- * Add support for more "network cable" chips; interop with their Win32
- * drivers may be a good thing. Test the AnchorChip 2720 support..
- * Figure out the initialization protocol used by the Prolific chips,
- * for better robustness ... there's some powerup/reset handshake that's
- * needed when only one end reboots.
- *
- * Use interrupt on PL230x to detect peer connect/disconnect, and call
- * netif_carrier_{on,off} (?) appropriately. For Net1080, detect peer
- * connect/disconnect with async control messages.
- *
- * Find some way to report "peer connected" network hotplug events; it'll
- * likely mean updating the networking layer. (This has been discussed
- * on the netdev list...)
+ * - AN2720 ... not widely available, but reportedly works well
*
- * Craft smarter hotplug policy scripts ... ones that know how to arrange
+ * - Belkin/eTEK ... no known issues
+ *
+ * - Both GeneSys and PL-230x use interrupt transfers for driver-to-driver
+ * handshaking; it'd be worth implementing those as "carrier detect".
+ * Prefer generic hooks, not minidriver-specific hacks.
+ *
+ * - Linux devices ... the www.handhelds.org SA-1100 support works nicely,
+ * but the Sharp Zaurus uses an incompatible protocol (extra checksums).
+ * No reason not to merge the Zaurus protocol here too (got patch? :)
+ *
+ * - For Netchip, should use keventd to poll via control requests to detect
+ * hardware level "carrier detect".
+ *
+ * - PL-230x ... the initialization protocol doesn't seem to match chip data
+ * sheets, sometimes it's not needed and sometimes it hangs. Prolific has
+ * not responded to repeated support/information requests.
+ *
+ * Interop with more Win32 drivers may be a good thing.
+ *
+ * Seems like reporting "peer connected" (carrier present) events may end
+ * up going through the netlink event system, not hotplug ... that may be
+ * awkward in terms of automatic configuration though.
+ *
+ * There are reports that bridging gives lower-than-usual throughput.
+ *
+ * Need smarter hotplug policy scripts ... ones that know how to arrange
* bridging with "brctl", and can handle static and dynamic ("pump") setups.
- * Use those "peer connected" events.
+ * Use those eventual "peer connected" events, and zeroconf.
*
*
* CHANGELOG:
@@ -62,6 +71,7 @@
* 18-dec-2000 (db) tx watchdog, "net1080" renaming to "usbnet", device_info
* and prolific support, isolate net1080-specific bits, cleanup.
* fix unlink_urbs oops in D3 PM resume code path.
+ *
* 02-feb-2001 (db) fix tx skb sharing, packet length, match_flags, ...
* 08-feb-2001 stubbed in "linuxdev", maybe the SA-1100 folk can use it;
* AnchorChips 2720 support (from spec) for testing;
@@ -83,6 +93,14 @@
* tie mostly to (sub)driver info. Workaround some PL-2302
* chips that seem to reject SET_INTERFACE requests.
*
+ * 06-apr-2002 Added ethtool support, based on a patch from Brad Hards.
+ * Level of diagnostics is more configurable; they use device
+ * location (usb_device->devpath) instead of address (2.5).
+ * For tx_fixup, memflags can't be NOIO.
+ * 07-may-2002 Generalize/cleanup keventd support, handling rx stalls (mostly
+ * for USB 2.0 TTs) and memory shortages (potential) too. (db)
+ * Use "locally assigned" IEEE802 address space. (Brad Hards)
+ *
*-------------------------------------------------------------------------*/
#include <linux/config.h>
@@ -93,6 +111,9 @@
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/random.h>
+#include <linux/ethtool.h>
+#include <linux/tqueue.h>
+#include <asm/uaccess.h>
#include <asm/unaligned.h>
// #define DEBUG // error path messages, extra info
@@ -104,15 +125,27 @@
#endif
#include <linux/usb.h>
+/* in 2.5 these standard usb ops take mem_flags */
+#define ALLOC_URB(n,flags) usb_alloc_urb(n)
+#define SUBMIT_URB(u,flags) usb_submit_urb(u)
+
+/* and these got renamed (may move to usb.h) */
+#define usb_get_dev usb_inc_dev_use
+#define usb_put_dev usb_dec_dev_use
+
+/* minidrivers _could_ be individually configured */
#define CONFIG_USB_AN2720
#define CONFIG_USB_BELKIN
+#define CONFIG_USB_EPSON2888
#define CONFIG_USB_GENESYS
#define CONFIG_USB_LINUXDEV
#define CONFIG_USB_NET1080
#define CONFIG_USB_PL2301
+#define DRIVER_VERSION "17-Jul-2002"
+
/*-------------------------------------------------------------------------*/
/*
@@ -164,6 +197,7 @@
// protocol/interface state
struct net_device net;
struct net_device_stats stats;
+ int msg_level;
#ifdef CONFIG_USB_NET1080
u16 packet_id;
@@ -174,7 +208,12 @@
struct sk_buff_head txq;
struct sk_buff_head done;
struct tasklet_struct bh;
- struct tq_struct ctrl_task;
+
+ struct tq_struct kevent;
+ unsigned long flags;
+# define EVENT_TX_HALT 0
+# define EVENT_RX_HALT 1
+# define EVENT_RX_MEMORY 2
};
// device-specific info used by the driver
@@ -224,6 +263,13 @@
size_t length;
};
+static const char driver_name [] = "usbnet";
+
+/* use ethtool to change the level for any given device */
+static int msg_level = 1;
+MODULE_PARM (msg_level, "i");
+MODULE_PARM_DESC (msg_level, "Initial message level (default = 1)");
+
#define mutex_lock(x) down(x)
#define mutex_unlock(x) up(x)
@@ -241,7 +287,9 @@
#endif
#define devinfo(usbnet, fmt, arg...) \
- printk(KERN_INFO "%s: " fmt "\n" , (usbnet)->net.name, ## arg)
+ do { if ((usbnet)->msg_level >= 1) \
+ printk(KERN_INFO "%s: " fmt "\n" , (usbnet)->net.name, ## arg); \
+ } while (0)
#ifdef CONFIG_USB_AN2720
@@ -258,12 +306,12 @@
*-------------------------------------------------------------------------*/
static const struct driver_info an2720_info = {
- description: "AnchorChips/Cypress 2720",
+ .description = "AnchorChips/Cypress 2720",
// no reset available!
// no check_connect available!
- in: 2, out: 2, // direction distinguishes these
- epsize: 64,
+ .in = 2, .out = 2, // direction distinguishes these
+ .epsize =64,
};
#endif /* CONFIG_USB_AN2720 */
@@ -281,16 +329,39 @@
*-------------------------------------------------------------------------*/
static const struct driver_info belkin_info = {
- description: "Belkin, eTEK, or compatible",
+ .description = "Belkin, eTEK, or compatible",
- in: 1, out: 1, // direction distinguishes these
- epsize: 64,
+ .in = 1, .out = 1, // direction distinguishes these
+ .epsize =64,
};
#endif /* CONFIG_USB_BELKIN */
+#ifdef CONFIG_USB_EPSON2888
+
+/*-------------------------------------------------------------------------
+ *
+ * EPSON USB clients
+ *
+ * This is the same idea as "linuxdev" (below) except the firmware in the
+ * device might not be Tux-powered. Epson provides reference firmware that
+ * implements this interface. Product developers can reuse or modify that
+ * code, such as by using their own product and vendor codes.
+ *
+ *-------------------------------------------------------------------------*/
+
+static const struct driver_info epson2888_info = {
+ .description = "Epson USB Device",
+
+ .in = 4, .out = 3,
+ .epsize = 64,
+};
+
+#endif /* CONFIG_USB_EPSON2888 */
+
+
#ifdef CONFIG_USB_GENESYS
/*-------------------------------------------------------------------------
@@ -300,6 +371,15 @@
* ... should partially interop with the Win32 driver for this hardware
* The GeneSys docs imply there's some NDIS issue motivating this framing.
*
+ * Some info from GeneSys:
+ * - GL620USB-A is full duplex; GL620USB is only half duplex for bulk.
+ * (Some cables, like the BAFO-100c, use the half duplex version.)
+ * - For the full duplex model, the low bit of the version code says
+ * which side is which ("left/right").
+ * - For the half duplex type, a control/interrupt handshake settles
+ * the transfer direction. (That's disabled here, partially coded.)
+ * A control URB would block until other side writes an interrupt.
+ *
*-------------------------------------------------------------------------*/
// control msg write command
@@ -373,7 +453,7 @@
// issue usb interrupt read
if (priv && priv->irq_urb) {
// submit urb
- if ((retval = usb_submit_urb (priv->irq_urb)) != 0)
+ if ((retval = SUBMIT_URB (priv->irq_urb, GFP_KERNEL)) != 0)
dbg ("gl_interrupt_read: submit fail - %X...", retval);
else
dbg ("gl_interrupt_read: submit success...");
@@ -420,7 +500,7 @@
}
// allocate irq urb
- if ((priv->irq_urb = usb_alloc_urb (0)) == 0) {
+ if ((priv->irq_urb = ALLOC_URB (0, GFP_KERNEL)) == 0) {
dbg ("%s: cannot allocate private irq urb per device",
dev->net.name);
kfree (priv);
@@ -464,23 +544,8 @@
return 0;
}
-#else
-
-static int genelink_check_connect (struct usbnet *dev)
-{
- dbg ("%s: assuming peer is connected", dev->net.name);
- return 0;
-}
-
#endif
-// reset the device status
-static int genelink_reset (struct usbnet *dev)
-{
- // we don't need to reset, just return 0
- return 0;
-}
-
static int genelink_rx_fixup (struct usbnet *dev, struct sk_buff *skb)
{
struct gl_header *header;
@@ -600,15 +665,17 @@
}
static const struct driver_info genelink_info = {
- description: "Genesys GeneLink",
- flags: FLAG_FRAMING_GL | FLAG_NO_SETINT,
- reset: genelink_reset,
- check_connect: genelink_check_connect,
- rx_fixup: genelink_rx_fixup,
- tx_fixup: genelink_tx_fixup,
+ .description = "Genesys GeneLink",
+ .flags = FLAG_FRAMING_GL | FLAG_NO_SETINT,
+ .rx_fixup = genelink_rx_fixup,
+ .tx_fixup = genelink_tx_fixup,
+
+ .in = 1, .out = 2,
+ .epsize =64,
- in: 1, out: 2,
- epsize: 64,
+#ifdef GENELINK_ACK
+ .check_connect =genelink_check_connect,
+#endif
};
#endif /* CONFIG_USB_GENESYS */
@@ -629,21 +696,19 @@
*
* One example is Intel's SA-1100 chip, which integrates basic USB
* support (arch/arm/sa1100/usb-eth.c); it's used in the iPaq PDA.
+ * And others too, like the Yopy.
*
*-------------------------------------------------------------------------*/
-
static const struct driver_info linuxdev_info = {
- description: "Linux Device",
- // no reset defined (yet?)
- // no check_connect needed!
- in: 2, out: 1,
- epsize: 64,
+ .description = "Linux Device",
+
+ .in = 2, .out = 1,
+ .epsize = 64,
};
#endif /* CONFIG_USB_LINUXDEV */
-
#ifdef CONFIG_USB_NET1080
@@ -814,10 +879,10 @@
static inline void nc_dump_usbctl (struct usbnet *dev, u16 usbctl)
{
#ifdef DEBUG
- devdbg (dev, "net1080 %03d/%03d usbctl 0x%x:%s%s%s%s%s;"
+ devdbg (dev, "net1080 %s-%s usbctl 0x%x:%s%s%s%s%s;"
" this%s%s;"
" other%s%s; r/o 0x%x",
- dev->udev->bus->busnum, dev->udev->devnum,
+ dev->udev->bus->bus_name, dev->udev->devpath,
usbctl,
(usbctl & USBCTL_ENABLE_LANG) ? " lang" : "",
(usbctl & USBCTL_ENABLE_MFGR) ? " mfgr" : "",
@@ -859,10 +924,10 @@
static inline void nc_dump_status (struct usbnet *dev, u16 status)
{
#ifdef DEBUG
- devdbg (dev, "net1080 %03d/%03d status 0x%x:"
+ devdbg (dev, "net1080 %s-%s status 0x%x:"
" this (%c) PKT=%d%s%s%s;"
" other PKT=%d%s%s%s; unspec 0x%x",
- dev->udev->bus->busnum, dev->udev->devnum,
+ dev->udev->bus->bus_name, dev->udev->devpath,
status,
// XXX the packet counts don't seem right
@@ -897,8 +962,8 @@
static inline void nc_dump_ttl (struct usbnet *dev, u16 ttl)
{
#ifdef DEBUG
- devdbg (dev, "net1080 %03d/%03d ttl 0x%x this = %d, other = %d",
- dev->udev->bus->busnum, dev->udev->devnum,
+ devdbg (dev, "net1080 %s-%s ttl 0x%x this = %d, other = %d",
+ dev->udev->bus->bus_name, dev->udev->devpath,
ttl,
TTL_THIS (ttl),
@@ -921,7 +986,8 @@
// nc_dump_registers (dev);
if ((retval = nc_register_read (dev, REG_STATUS, vp)) < 0) {
- dbg ("can't read dev %d status: %d", dev->udev->devnum, retval);
+ dbg ("can't read %s-%s status: %d",
+ dev->udev->bus->bus_name, dev->udev->devpath, retval);
goto done;
}
status = *vp;
@@ -948,10 +1014,11 @@
MK_TTL (NC_READ_TTL_MS, TTL_OTHER (ttl)) );
dbg ("%s: assigned TTL, %d ms", dev->net.name, NC_READ_TTL_MS);
- devdbg (dev, "port %c, peer %sconnected",
- (status & STATUS_PORT_A) ? 'A' : 'B',
- (status & STATUS_CONN_OTHER) ? "" : "dis"
- );
+ if (dev->msg_level >= 2)
+ devinfo (dev, "port %c, peer %sconnected",
+ (status & STATUS_PORT_A) ? 'A' : 'B',
+ (status & STATUS_CONN_OTHER) ? "" : "dis"
+ );
retval = 0;
done:
@@ -1079,15 +1146,15 @@
}
static const struct driver_info net1080_info = {
- description: "NetChip TurboCONNECT",
- flags: FLAG_FRAMING_NC,
- reset: net1080_reset,
- check_connect: net1080_check_connect,
- rx_fixup: net1080_rx_fixup,
- tx_fixup: net1080_tx_fixup,
+ .description = "NetChip TurboCONNECT",
+ .flags = FLAG_FRAMING_NC,
+ .reset = net1080_reset,
+ .check_connect =net1080_check_connect,
+ .rx_fixup = net1080_rx_fixup,
+ .tx_fixup = net1080_tx_fixup,
- in: 1, out: 1, // direction distinguishes these
- epsize: 64,
+ .in = 1, .out = 1, // direction distinguishes these
+ .epsize =64,
};
#endif /* CONFIG_USB_NET1080 */
@@ -1147,24 +1214,14 @@
PL_S_EN|PL_RESET_OUT|PL_RESET_IN|PL_PEER_E);
}
-static int pl_check_connect (struct usbnet *dev)
-{
- // FIXME test interrupt data PL_PEER_E bit
- // plus, there's some handshake done by
- // the prolific win32 driver...
- dbg ("%s: assuming peer is connected", dev->net.name);
- return 0;
-}
-
static const struct driver_info prolific_info = {
- description: "Prolific PL-2301/PL-2302",
- flags: FLAG_NO_SETINT,
+ .description = "Prolific PL-2301/PL-2302",
+ .flags = FLAG_NO_SETINT,
/* some PL-2302 versions seem to fail usb_set_interface() */
- reset: pl_reset,
- check_connect: pl_check_connect,
+ .reset = pl_reset,
- in: 3, out: 2,
- epsize: 64,
+ .in = 3, .out = 2,
+ .epsize =64,
};
#endif /* CONFIG_USB_PL2301 */
@@ -1227,6 +1284,21 @@
spin_unlock_irqrestore (&dev->done.lock, flags);
}
+/* some work can't be done in tasklets, so we use keventd
+ *
+ * NOTE: annoying asymmetry: if it's active, schedule_task() fails,
+ * but tasklet_schedule() doesn't. hope the failure is rare.
+ */
+static void defer_kevent (struct usbnet *dev, int work)
+{
+ set_bit (work, &dev->flags);
+ if (!schedule_task (&dev->kevent))
+ err ("%s: kevent %d may have been dropped",
+ dev->net.name, work);
+ else
+ dbg ("%s: kevent %d scheduled", dev->net.name, work);
+}
+
/*-------------------------------------------------------------------------*/
static void rx_complete (struct urb *urb);
@@ -1253,7 +1325,7 @@
if ((skb = alloc_skb (size, flags)) == 0) {
dbg ("no rx skb");
- tasklet_schedule (&dev->bh);
+ defer_kevent (dev, EVENT_RX_MEMORY);
usb_free_urb (urb);
return;
}
@@ -1268,9 +1340,6 @@
usb_rcvbulkpipe (dev->udev, dev->driver_info->in),
skb->data, size, rx_complete, skb);
urb->transfer_flags |= USB_ASYNC_UNLINK;
-#ifdef REALLY_QUEUE
- urb->transfer_flags |= USB_QUEUE_BULK;
-#endif
#if 0
// Idle-but-posted reads with UHCI really chew up
// PCI bandwidth unless FSBR is disabled
@@ -1279,11 +1348,20 @@
spin_lock_irqsave (&dev->rxq.lock, lockflags);
- if (netif_running (&dev->net)) {
- if ((retval = usb_submit_urb (urb)) != 0) {
+ if (netif_running (&dev->net)
+ && !test_bit (EVENT_RX_HALT, &dev->flags)) {
+ switch (retval = SUBMIT_URB (urb, GFP_ATOMIC)){
+ case -EPIPE:
+ defer_kevent (dev, EVENT_RX_HALT);
+ break;
+ case -ENOMEM:
+ defer_kevent (dev, EVENT_RX_MEMORY);
+ break;
+ default:
dbg ("%s rx submit, %d", dev->net.name, retval);
tasklet_schedule (&dev->bh);
- } else {
+ break;
+ case 0:
__skb_queue_tail (&dev->rxq, skb);
}
} else {
@@ -1357,12 +1435,20 @@
}
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 ETIMEOUT/EILSEQ
+ // storm, recovering as needed.
+ case -EPIPE:
+ defer_kevent (dev, EVENT_RX_HALT);
+ // FALLTHROUGH
+
// software-driven interface shutdown
- case -ECONNRESET: // usb-ohci, usb-uhci
- case -ECONNABORTED: // uhci ... for usb-uhci, INTR
- dbg ("%s shutdown, code %d", dev->net.name, urb_status);
+ case -ECONNRESET: // according to API spec
+ case -ECONNABORTED: // some (now fixed?) UHCI bugs
+ dbg ("%s rx shutdown, code %d", dev->net.name, urb_status);
entry->state = rx_cleanup;
- // do urb frees only in the tasklet
+ // do urb frees only in the tasklet (UHCI has oopsed ...)
entry->urb = urb;
urb = 0;
break;
@@ -1373,8 +1459,9 @@
// FALLTHROUGH
default:
- // on unplug we'll get a burst of ETIMEDOUT/EILSEQ
- // till the khubd gets and handles its interrupt.
+ // on unplug we get ETIMEDOUT (ohci) or EILSEQ (uhci)
+ // until khubd sees its interrupt and disconnects us.
+ // that can easily be hundreds of passes through here.
entry->state = rx_cleanup;
dev->stats.rx_errors++;
dbg ("%s rx: status %d", dev->net.name, urb_status);
@@ -1384,10 +1471,12 @@
defer_bh (dev, skb);
if (urb) {
- if (netif_running (&dev->net)) {
+ if (netif_running (&dev->net)
+ && !test_bit (EVENT_RX_HALT, &dev->flags)) {
rx_submit (dev, urb, GFP_ATOMIC);
return;
}
+ usb_free_urb (urb);
}
#ifdef VERBOSE
dbg ("no read resubmitted");
@@ -1417,7 +1506,7 @@
// during some PM-driven resume scenarios,
// these (async) unlinks complete immediately
retval = usb_unlink_urb (urb);
- if (retval < 0)
+ if (retval != -EINPROGRESS && retval != 0)
dbg ("unlink urb err, %d", retval);
else
count++;
@@ -1441,10 +1530,11 @@
mutex_lock (&dev->mutex);
netif_stop_queue (net);
- devdbg (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
- );
+ if (dev->msg_level >= 2)
+ 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
+ );
// ensure there are no more active urbs
add_wait_queue (&unlink_wakeup, &wait);
@@ -1482,9 +1572,9 @@
// put into "known safe" state
if (info->reset && (retval = info->reset (dev)) < 0) {
- devinfo (dev, "open reset fail (%d) usbnet %03d/%03d, %s",
+ devinfo (dev, "open reset fail (%d) usbnet usb-%s-%s, %s",
retval,
- dev->udev->bus->busnum, dev->udev->devnum,
+ dev->udev->bus->bus_name, dev->udev->devpath,
info->description);
goto done;
}
@@ -1496,14 +1586,16 @@
}
netif_start_queue (net);
- devdbg (dev, "open: enable queueing (rx %d, tx %d) mtu %d %s framing",
- RX_QLEN, TX_QLEN, dev->net.mtu,
- (info->flags & (FLAG_FRAMING_NC | FLAG_FRAMING_GL))
- ? ((info->flags & FLAG_FRAMING_NC)
- ? "NetChip"
- : "GeneSys")
- : "raw"
- );
+ if (dev->msg_level >= 2)
+ devinfo (dev, "open: enable queueing "
+ "(rx %d, tx %d) mtu %d %s framing",
+ RX_QLEN, TX_QLEN, dev->net.mtu,
+ (info->flags & (FLAG_FRAMING_NC | FLAG_FRAMING_GL))
+ ? ((info->flags & FLAG_FRAMING_NC)
+ ? "NetChip"
+ : "GeneSys")
+ : "raw"
+ );
// delay posting reads until we're fully open
tasklet_schedule (&dev->bh);
@@ -1514,16 +1606,134 @@
/*-------------------------------------------------------------------------*/
-/* usb_clear_halt cannot be called in interrupt context */
+static int usbnet_ethtool_ioctl (struct net_device *net, void *useraddr)
+{
+ struct usbnet *dev = (struct usbnet *) net->priv;
+ u32 cmd;
+
+ if (get_user (cmd, (u32 *)useraddr))
+ return -EFAULT;
+ switch (cmd) {
+
+ case ETHTOOL_GDRVINFO: { /* get driver info */
+ struct ethtool_drvinfo info;
+
+ memset (&info, 0, sizeof info);
+ info.cmd = ETHTOOL_GDRVINFO;
+ strncpy (info.driver, 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);
+ if (copy_to_user (useraddr, &info, sizeof (info)))
+ return -EFAULT;
+ return 0;
+ }
+
+ case ETHTOOL_GLINK: /* get link status */
+ if (dev->driver_info->check_connect) {
+ struct ethtool_value edata = { ETHTOOL_GLINK };
+
+ edata.data = dev->driver_info->check_connect (dev) == 0;
+ if (copy_to_user (useraddr, &edata, sizeof (edata)))
+ return -EFAULT;
+ return 0;
+ }
+ break;
+ case ETHTOOL_GMSGLVL: { /* get message-level */
+ struct ethtool_value edata = {ETHTOOL_GMSGLVL};
+
+ edata.data = dev->msg_level;
+ if (copy_to_user (useraddr, &edata, sizeof (edata)))
+ return -EFAULT;
+ return 0;
+ }
+
+ case ETHTOOL_SMSGLVL: { /* set message-level */
+ struct ethtool_value edata;
+
+ if (copy_from_user (&edata, useraddr, sizeof (edata)))
+ return -EFAULT;
+ dev->msg_level = edata.data;
+ return 0;
+ }
+
+ /* could also map RINGPARAM to RX/TX QLEN */
+
+ }
+ /* Note that the ethtool user space code requires EOPNOTSUPP */
+ return -EOPNOTSUPP;
+}
+
+static int usbnet_ioctl (struct net_device *net, struct ifreq *rq, int cmd)
+{
+ switch (cmd) {
+ case SIOCETHTOOL:
+ return usbnet_ethtool_ioctl (net, (void *)rq->ifr_data);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* work that cannot be done in interrupt context uses keventd.
+ *
+ * NOTE: "uhci" and "usb-uhci" may have trouble with this since they don't
+ * queue control transfers to individual devices, and other threads could
+ * trigger control requests concurrently. hope that's rare.
+ */
static void
-tx_clear_halt (void *data)
+kevent (void *data)
{
struct usbnet *dev = data;
+ int status;
- usb_clear_halt (dev->udev,
- usb_sndbulkpipe (dev->udev, dev->driver_info->out));
- netif_wake_queue (&dev->net);
+ /* usb_clear_halt() needs a thread context */
+ if (test_bit (EVENT_TX_HALT, &dev->flags)) {
+ unlink_urbs (&dev->txq);
+ status = usb_clear_halt (dev->udev,
+ usb_sndbulkpipe (dev->udev, dev->driver_info->out));
+ if (status < 0)
+ err ("%s: can't clear tx halt, status %d",
+ dev->net.name, status);
+ else {
+ clear_bit (EVENT_TX_HALT, &dev->flags);
+ netif_wake_queue (&dev->net);
+ }
+ }
+ if (test_bit (EVENT_RX_HALT, &dev->flags)) {
+ unlink_urbs (&dev->rxq);
+ status = usb_clear_halt (dev->udev,
+ usb_rcvbulkpipe (dev->udev, dev->driver_info->in));
+ if (status < 0)
+ err ("%s: can't clear rx halt, status %d",
+ dev->net.name, 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 = 0;
+
+ if (netif_running (&dev->net))
+ urb = ALLOC_URB (0, GFP_KERNEL);
+ else
+ clear_bit (EVENT_RX_MEMORY, &dev->flags);
+ if (urb != 0) {
+ clear_bit (EVENT_RX_MEMORY, &dev->flags);
+ rx_submit (dev, urb, GFP_KERNEL);
+ tasklet_schedule (&dev->bh);
+ }
+ }
+
+ if (dev->flags)
+ dbg ("%s: kevent done, flags = 0x%lx",
+ dev->net.name, dev->flags);
}
/*-------------------------------------------------------------------------*/
@@ -1534,15 +1744,8 @@
struct skb_data *entry = (struct skb_data *) skb->cb;
struct usbnet *dev = entry->dev;
- if (urb->status == USB_ST_STALL) {
- if (dev->ctrl_task.sync == 0) {
- dev->ctrl_task.routine = tx_clear_halt;
- dev->ctrl_task.data = dev;
- schedule_task (&dev->ctrl_task);
- } else {
- dbg ("Cannot clear TX stall");
- }
- }
+ if (urb->status == -EPIPE)
+ defer_kevent (dev, EVENT_TX_HALT);
urb->dev = 0;
entry->state = tx_done;
defer_bh (dev, skb);
@@ -1576,19 +1779,17 @@
struct nc_trailer *trailer = 0;
#endif /* CONFIG_USB_NET1080 */
- flags = in_interrupt () ? GFP_ATOMIC : GFP_NOIO; /* might be used for nfs */
-
// 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, flags);
+ skb = info->tx_fixup (dev, skb, GFP_ATOMIC);
if (!skb) {
dbg ("can't tx_fixup skb");
goto drop;
}
}
- if (!(urb = usb_alloc_urb (0))) {
+ if (!(urb = ALLOC_URB (0, GFP_ATOMIC))) {
dbg ("no urb");
goto drop;
}
@@ -1621,9 +1822,6 @@
usb_sndbulkpipe (dev->udev, info->out),
skb->data, skb->len, tx_complete, skb);
urb->transfer_flags |= USB_ASYNC_UNLINK;
-#ifdef REALLY_QUEUE
- urb->transfer_flags |= USB_QUEUE_BULK;
-#endif
// FIXME urb->timeout = ... jiffies ... ;
spin_lock_irqsave (&dev->txq.lock, flags);
@@ -1640,15 +1838,19 @@
}
#endif /* CONFIG_USB_NET1080 */
- netif_stop_queue (net);
- if ((retval = usb_submit_urb (urb)) != 0) {
- netif_start_queue (net);
+ switch ((retval = SUBMIT_URB (urb, GFP_ATOMIC))) {
+ case -EPIPE:
+ netif_stop_queue (net);
+ defer_kevent (dev, EVENT_TX_HALT);
+ break;
+ default:
dbg ("%s tx: submit urb err %d", net->name, retval);
- } else {
+ break;
+ case 0:
net->trans_start = jiffies;
__skb_queue_tail (&dev->txq, skb);
- if (dev->txq.qlen < TX_QLEN)
- netif_start_queue (net);
+ if (dev->txq.qlen >= TX_QLEN)
+ netif_stop_queue (net);
}
spin_unlock_irqrestore (&dev->txq.lock, flags);
@@ -1715,14 +1917,15 @@
}
// or are we maybe short a few urbs?
- } else if (netif_running (&dev->net)) {
+ } else if (netif_running (&dev->net)
+ && !test_bit (EVENT_RX_HALT, &dev->flags)) {
int temp = dev->rxq.qlen;
if (temp < RX_QLEN) {
struct urb *urb;
int i;
for (i = 0; i < 3 && dev->rxq.qlen < RX_QLEN; i++) {
- if ((urb = usb_alloc_urb (0)) != 0)
+ if ((urb = ALLOC_URB (0, GFP_ATOMIC)) != 0)
rx_submit (dev, urb, GFP_ATOMIC);
}
if (temp != dev->rxq.qlen)
@@ -1750,8 +1953,8 @@
{
struct usbnet *dev = (struct usbnet *) ptr;
- devinfo (dev, "unregister usbnet %03d/%03d, %s",
- udev->bus->busnum, udev->devnum,
+ devinfo (dev, "unregister usbnet usb-%s-%s, %s",
+ udev->bus->bus_name, udev->devpath,
dev->driver_info->description);
unregister_netdev (&dev->net);
@@ -1761,8 +1964,11 @@
list_del (&dev->dev_list);
mutex_unlock (&usbnet_mutex);
+ // assuming we used keventd, it must quiesce too
+ flush_scheduled_tasks ();
+
kfree (dev);
- usb_dec_dev_use (udev);
+ usb_put_dev (udev);
}
@@ -1808,15 +2014,17 @@
memset (dev, 0, sizeof *dev);
init_MUTEX_LOCKED (&dev->mutex);
- usb_inc_dev_use (udev);
+ usb_get_dev (udev);
dev->udev = udev;
dev->driver_info = info;
+ dev->msg_level = msg_level;
INIT_LIST_HEAD (&dev->dev_list);
skb_queue_head_init (&dev->rxq);
skb_queue_head_init (&dev->txq);
skb_queue_head_init (&dev->done);
dev->bh.func = usbnet_bh;
dev->bh.data = (unsigned long) dev;
+ INIT_TQUEUE (&dev->kevent, kevent, dev);
// set up network interface records
net = &dev->net;
@@ -1836,10 +2044,11 @@
net->stop = usbnet_stop;
net->watchdog_timeo = TX_TIMEOUT_JIFFIES;
net->tx_timeout = usbnet_tx_timeout;
+ net->do_ioctl = usbnet_ioctl;
register_netdev (&dev->net);
- devinfo (dev, "register usbnet %03d/%03d, %s",
- udev->bus->busnum, udev->devnum,
+ devinfo (dev, "register usbnet usb-%s-%s, %s",
+ udev->bus->bus_name, udev->devpath,
dev->driver_info->description);
// ok, it's ready to go.
@@ -1867,33 +2076,41 @@
#ifdef CONFIG_USB_AN2720
{
USB_DEVICE (0x0547, 0x2720), // AnchorChips defaults
- driver_info: (unsigned long) &an2720_info,
-},
-
-{
+ .driver_info = (unsigned long) &an2720_info,
+}, {
USB_DEVICE (0x0547, 0x2727), // Xircom PGUNET
- driver_info: (unsigned long) &an2720_info,
+ .driver_info = (unsigned long) &an2720_info,
},
#endif
#ifdef CONFIG_USB_BELKIN
{
USB_DEVICE (0x050d, 0x0004), // Belkin
- driver_info: (unsigned long) &belkin_info,
+ .driver_info = (unsigned long) &belkin_info,
}, {
USB_DEVICE (0x056c, 0x8100), // eTEK
- driver_info: (unsigned long) &belkin_info,
+ .driver_info = (unsigned long) &belkin_info,
}, {
USB_DEVICE (0x0525, 0x9901), // Advance USBNET (eTEK)
- driver_info: (unsigned long) &belkin_info,
+ .driver_info = (unsigned long) &belkin_info,
+},
+#endif
+
+#ifdef CONFIG_USB_EPSON2888
+{
+ USB_DEVICE (0x0525, 0x2888), // EPSON USB client
+ driver_info: (unsigned long) &epson2888_info,
},
#endif
#ifdef CONFIG_USB_GENESYS
{
USB_DEVICE (0x05e3, 0x0502), // GL620USB-A
- driver_info: (unsigned long) &genelink_info,
+ .driver_info = (unsigned long) &genelink_info,
},
+ /* NOT: USB_DEVICE (0x05e3, 0x0501), // GL620USB
+ * that's half duplex, not currently supported
+ */
#endif
#ifdef CONFIG_USB_LINUXDEV
@@ -1904,28 +2121,32 @@
{
// 1183 = 0x049F, both used as hex values?
USB_DEVICE (0x049F, 0x505A), // Compaq "Itsy"
- driver_info: (unsigned long) &linuxdev_info,
+ .driver_info = (unsigned long) &linuxdev_info,
+}, {
+ USB_DEVICE (0x0E7E, 0x1001), // G.Mate "Yopy"
+ .driver_info = (unsigned long) &linuxdev_info,
},
+ // NOTE: the Sharp Zaurus uses a modified version of
+ // this driver, which is not interoperable with this.
#endif
#ifdef CONFIG_USB_NET1080
{
USB_DEVICE (0x0525, 0x1080), // NetChip ref design
- driver_info: (unsigned long) &net1080_info,
-},
-{
+ .driver_info = (unsigned long) &net1080_info,
+}, {
USB_DEVICE (0x06D0, 0x0622), // Laplink Gold
- driver_info: (unsigned long) &net1080_info,
+ .driver_info = (unsigned long) &net1080_info,
},
#endif
#ifdef CONFIG_USB_PL2301
{
USB_DEVICE (0x067b, 0x0000), // PL-2301
- driver_info: (unsigned long) &prolific_info,
+ .driver_info = (unsigned long) &prolific_info,
}, {
USB_DEVICE (0x067b, 0x0001), // PL-2302
- driver_info: (unsigned long) &prolific_info,
+ .driver_info = (unsigned long) &prolific_info,
},
#endif
@@ -1936,10 +2157,10 @@
MODULE_DEVICE_TABLE (usb, products);
static struct usb_driver usbnet_driver = {
- name: "usbnet",
- id_table: products,
- probe: usbnet_probe,
- disconnect: usbnet_disconnect,
+ .name = driver_name,
+ .id_table = products,
+ .probe = usbnet_probe,
+ .disconnect = usbnet_disconnect,
};
/*-------------------------------------------------------------------------*/
@@ -1952,6 +2173,7 @@
get_random_bytes (node_id, sizeof node_id);
node_id [0] &= 0xfe; // clear multicast bit
+ node_id [0] |= 0x02; // set local assignment bit (IEEE802)
if (usb_register (&usbnet_driver) < 0)
return -1;
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)