Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
David Brownell | 090ffa9 | 2005-08-31 09:54:50 -0700 | [diff] [blame] | 2 | * USB Network driver infrastructure |
David Brownell | f29fc25 | 2005-08-31 09:52:31 -0700 | [diff] [blame] | 3 | * Copyright (C) 2000-2005 by David Brownell |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | |
| 21 | /* |
| 22 | * This is a generic "USB networking" framework that works with several |
David Brownell | 090ffa9 | 2005-08-31 09:54:50 -0700 | [diff] [blame] | 23 | * kinds of full and high speed networking devices: host-to-host cables, |
| 24 | * smart usb peripherals, and actual Ethernet adapters. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | * |
David Brownell | 090ffa9 | 2005-08-31 09:54:50 -0700 | [diff] [blame] | 26 | * These devices usually differ in terms of control protocols (if they |
| 27 | * even have one!) and sometimes they define new framing to wrap or batch |
| 28 | * Ethernet packets. Otherwise, they talk to USB pretty much the same, |
| 29 | * so interface (un)binding, endpoint I/O queues, fault handling, and other |
| 30 | * issues can usefully be addressed by this framework. |
| 31 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | |
| 33 | // #define DEBUG // error path messages, extra info |
| 34 | // #define VERBOSE // more; success messages |
| 35 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <linux/init.h> |
| 38 | #include <linux/netdevice.h> |
| 39 | #include <linux/etherdevice.h> |
Peter Holik | 03ad032 | 2009-04-18 07:24:17 +0000 | [diff] [blame] | 40 | #include <linux/ctype.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include <linux/ethtool.h> |
| 42 | #include <linux/workqueue.h> |
| 43 | #include <linux/mii.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <linux/usb.h> |
Jussi Kivilinna | 3692e94 | 2008-01-26 00:51:45 +0200 | [diff] [blame] | 45 | #include <linux/usb/usbnet.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 46 | #include <linux/slab.h> |
Andy Shevchenko | fd1f170 | 2010-07-23 03:18:08 +0000 | [diff] [blame] | 47 | #include <linux/kernel.h> |
Ming Lei | b0786b4 | 2010-11-01 07:11:54 -0700 | [diff] [blame] | 48 | #include <linux/pm_runtime.h> |
David Brownell | f29fc25 | 2005-08-31 09:52:31 -0700 | [diff] [blame] | 49 | |
| 50 | #define DRIVER_VERSION "22-Aug-2005" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
| 52 | |
| 53 | /*-------------------------------------------------------------------------*/ |
| 54 | |
| 55 | /* |
| 56 | * Nineteen USB 1.1 max size bulk transactions per frame (ms), max. |
| 57 | * Several dozen bytes of IPv4 data can fit in two such transactions. |
| 58 | * One maximum size Ethernet packet takes twenty four of them. |
| 59 | * For high speed, each frame comfortably fits almost 36 max size |
| 60 | * Ethernet packets (so queues should be bigger). |
David Brownell | f29fc25 | 2005-08-31 09:52:31 -0700 | [diff] [blame] | 61 | * |
| 62 | * REVISIT qlens should be members of 'struct usbnet'; the goal is to |
| 63 | * let the USB host controller be busy for 5msec or more before an irq |
| 64 | * is required, under load. Jumbograms change the equation. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | */ |
Jamie Painter | a99c194 | 2006-07-27 14:17:28 -0400 | [diff] [blame] | 66 | #define RX_MAX_QUEUE_MEMORY (60 * 1518) |
| 67 | #define RX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? \ |
| 68 | (RX_MAX_QUEUE_MEMORY/(dev)->rx_urb_size) : 4) |
| 69 | #define TX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? \ |
| 70 | (RX_MAX_QUEUE_MEMORY/(dev)->hard_mtu) : 4) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | // reawaken network queue this soon after stopping; else watchdog barks |
| 73 | #define TX_TIMEOUT_JIFFIES (5*HZ) |
| 74 | |
| 75 | // throttle rx/tx briefly after some faults, so khubd might disconnect() |
| 76 | // us (it polls at HZ/4 usually) before we report too many false errors. |
| 77 | #define THROTTLE_JIFFIES (HZ/8) |
| 78 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | // between wakeups |
| 80 | #define UNLINK_TIMEOUT_MS 3 |
| 81 | |
| 82 | /*-------------------------------------------------------------------------*/ |
| 83 | |
| 84 | // randomly generated ethernet address |
| 85 | static u8 node_id [ETH_ALEN]; |
| 86 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | static const char driver_name [] = "usbnet"; |
| 88 | |
| 89 | /* use ethtool to change the level for any given device */ |
| 90 | static int msg_level = -1; |
| 91 | module_param (msg_level, int, 0); |
| 92 | MODULE_PARM_DESC (msg_level, "Override default message level"); |
| 93 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | /*-------------------------------------------------------------------------*/ |
| 95 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | /* handles CDC Ethernet and many other network "bulk data" interfaces */ |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 97 | int usbnet_get_endpoints(struct usbnet *dev, struct usb_interface *intf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | { |
| 99 | int tmp; |
| 100 | struct usb_host_interface *alt = NULL; |
| 101 | struct usb_host_endpoint *in = NULL, *out = NULL; |
| 102 | struct usb_host_endpoint *status = NULL; |
| 103 | |
| 104 | for (tmp = 0; tmp < intf->num_altsetting; tmp++) { |
| 105 | unsigned ep; |
| 106 | |
| 107 | in = out = status = NULL; |
| 108 | alt = intf->altsetting + tmp; |
| 109 | |
| 110 | /* take the first altsetting with in-bulk + out-bulk; |
| 111 | * remember any status endpoint, just in case; |
Justin P. Mattock | 70f23fd | 2011-05-10 10:16:21 +0200 | [diff] [blame] | 112 | * ignore other endpoints and altsettings. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | */ |
| 114 | for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) { |
| 115 | struct usb_host_endpoint *e; |
| 116 | int intr = 0; |
| 117 | |
| 118 | e = alt->endpoint + ep; |
| 119 | switch (e->desc.bmAttributes) { |
| 120 | case USB_ENDPOINT_XFER_INT: |
Luiz Fernando N. Capitulino | fc6e254 | 2006-10-26 13:03:01 -0300 | [diff] [blame] | 121 | if (!usb_endpoint_dir_in(&e->desc)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | continue; |
| 123 | intr = 1; |
| 124 | /* FALLTHROUGH */ |
| 125 | case USB_ENDPOINT_XFER_BULK: |
| 126 | break; |
| 127 | default: |
| 128 | continue; |
| 129 | } |
Luiz Fernando N. Capitulino | fc6e254 | 2006-10-26 13:03:01 -0300 | [diff] [blame] | 130 | if (usb_endpoint_dir_in(&e->desc)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | if (!intr && !in) |
| 132 | in = e; |
| 133 | else if (intr && !status) |
| 134 | status = e; |
| 135 | } else { |
| 136 | if (!out) |
| 137 | out = e; |
| 138 | } |
| 139 | } |
| 140 | if (in && out) |
| 141 | break; |
| 142 | } |
| 143 | if (!alt || !in || !out) |
| 144 | return -EINVAL; |
| 145 | |
Joe Perches | 8e95a20 | 2009-12-03 07:58:21 +0000 | [diff] [blame] | 146 | if (alt->desc.bAlternateSetting != 0 || |
| 147 | !(dev->driver_info->flags & FLAG_NO_SETINT)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | tmp = usb_set_interface (dev->udev, alt->desc.bInterfaceNumber, |
| 149 | alt->desc.bAlternateSetting); |
| 150 | if (tmp < 0) |
| 151 | return tmp; |
| 152 | } |
David Brownell | cb1cebb | 2007-02-15 18:52:30 -0800 | [diff] [blame] | 153 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | dev->in = usb_rcvbulkpipe (dev->udev, |
| 155 | in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); |
| 156 | dev->out = usb_sndbulkpipe (dev->udev, |
| 157 | out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); |
| 158 | dev->status = status; |
| 159 | return 0; |
| 160 | } |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 161 | EXPORT_SYMBOL_GPL(usbnet_get_endpoints); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | |
Peter Holik | 03ad032 | 2009-04-18 07:24:17 +0000 | [diff] [blame] | 163 | int usbnet_get_ethernet_addr(struct usbnet *dev, int iMACAddress) |
| 164 | { |
| 165 | int tmp, i; |
| 166 | unsigned char buf [13]; |
| 167 | |
| 168 | tmp = usb_string(dev->udev, iMACAddress, buf, sizeof buf); |
| 169 | if (tmp != 12) { |
| 170 | dev_dbg(&dev->udev->dev, |
| 171 | "bad MAC string %d fetch, %d\n", iMACAddress, tmp); |
| 172 | if (tmp >= 0) |
| 173 | tmp = -EINVAL; |
| 174 | return tmp; |
| 175 | } |
| 176 | for (i = tmp = 0; i < 6; i++, tmp += 2) |
| 177 | dev->net->dev_addr [i] = |
Andy Shevchenko | fd1f170 | 2010-07-23 03:18:08 +0000 | [diff] [blame] | 178 | (hex_to_bin(buf[tmp]) << 4) + hex_to_bin(buf[tmp + 1]); |
Peter Holik | 03ad032 | 2009-04-18 07:24:17 +0000 | [diff] [blame] | 179 | return 0; |
| 180 | } |
| 181 | EXPORT_SYMBOL_GPL(usbnet_get_ethernet_addr); |
| 182 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 183 | static void intr_complete (struct urb *urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | |
| 185 | static int init_status (struct usbnet *dev, struct usb_interface *intf) |
| 186 | { |
| 187 | char *buf = NULL; |
| 188 | unsigned pipe = 0; |
| 189 | unsigned maxp; |
| 190 | unsigned period; |
| 191 | |
| 192 | if (!dev->driver_info->status) |
| 193 | return 0; |
| 194 | |
| 195 | pipe = usb_rcvintpipe (dev->udev, |
| 196 | dev->status->desc.bEndpointAddress |
| 197 | & USB_ENDPOINT_NUMBER_MASK); |
| 198 | maxp = usb_maxpacket (dev->udev, pipe, 0); |
| 199 | |
| 200 | /* avoid 1 msec chatter: min 8 msec poll rate */ |
| 201 | period = max ((int) dev->status->desc.bInterval, |
| 202 | (dev->udev->speed == USB_SPEED_HIGH) ? 7 : 3); |
| 203 | |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 204 | buf = kmalloc (maxp, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | if (buf) { |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 206 | dev->interrupt = usb_alloc_urb (0, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | if (!dev->interrupt) { |
| 208 | kfree (buf); |
| 209 | return -ENOMEM; |
| 210 | } else { |
| 211 | usb_fill_int_urb(dev->interrupt, dev->udev, pipe, |
| 212 | buf, maxp, intr_complete, dev, period); |
tom.leiming@gmail.com | 720f3d7 | 2012-04-29 22:51:02 +0000 | [diff] [blame] | 213 | dev->interrupt->transfer_flags |= URB_FREE_BUFFER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | dev_dbg(&intf->dev, |
| 215 | "status ep%din, %d bytes period %d\n", |
| 216 | usb_pipeendpoint(pipe), maxp, period); |
| 217 | } |
| 218 | } |
David Brownell | 18ab458 | 2007-05-25 12:31:32 -0700 | [diff] [blame] | 219 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | } |
| 221 | |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 222 | /* Passes this packet up the stack, updating its accounting. |
| 223 | * Some link protocols batch packets, so their rx_fixup paths |
| 224 | * can return clones as well as just modify the original skb. |
| 225 | */ |
| 226 | void usbnet_skb_return (struct usbnet *dev, struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | { |
| 228 | int status; |
| 229 | |
Jussi Kivilinna | 7834ddb | 2009-08-11 22:57:16 +0300 | [diff] [blame] | 230 | if (test_bit(EVENT_RX_PAUSED, &dev->flags)) { |
| 231 | skb_queue_tail(&dev->rxq_pause, skb); |
| 232 | return; |
| 233 | } |
| 234 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | skb->protocol = eth_type_trans (skb, dev->net); |
Herbert Xu | 7963837 | 2009-06-29 16:53:28 +0000 | [diff] [blame] | 236 | dev->net->stats.rx_packets++; |
| 237 | dev->net->stats.rx_bytes += skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 239 | netif_dbg(dev, rx_status, dev->net, "< rx, len %zu, type 0x%x\n", |
| 240 | skb->len + sizeof (struct ethhdr), skb->protocol); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | memset (skb->cb, 0, sizeof (struct skb_data)); |
Michael Riesch | f9b491e | 2011-09-29 04:06:26 +0000 | [diff] [blame] | 242 | |
| 243 | if (skb_defer_rx_timestamp(skb)) |
| 244 | return; |
| 245 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | status = netif_rx (skb); |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 247 | if (status != NET_RX_SUCCESS) |
| 248 | netif_dbg(dev, rx_err, dev->net, |
| 249 | "netif_rx status %d\n", status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | } |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 251 | EXPORT_SYMBOL_GPL(usbnet_skb_return); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | |
| 253 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | /*------------------------------------------------------------------------- |
| 255 | * |
| 256 | * Network Device Driver (peer link to "Host Device", from USB host) |
| 257 | * |
| 258 | *-------------------------------------------------------------------------*/ |
| 259 | |
Stephen Hemminger | 777baa4 | 2009-03-20 19:35:54 +0000 | [diff] [blame] | 260 | int usbnet_change_mtu (struct net_device *net, int new_mtu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | { |
| 262 | struct usbnet *dev = netdev_priv(net); |
David Brownell | f29fc25 | 2005-08-31 09:52:31 -0700 | [diff] [blame] | 263 | int ll_mtu = new_mtu + net->hard_header_len; |
Jamie Painter | a99c194 | 2006-07-27 14:17:28 -0400 | [diff] [blame] | 264 | int old_hard_mtu = dev->hard_mtu; |
| 265 | int old_rx_urb_size = dev->rx_urb_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | |
Jamie Painter | a99c194 | 2006-07-27 14:17:28 -0400 | [diff] [blame] | 267 | if (new_mtu <= 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | // no second zero-length packet read wanted after mtu-sized packets |
David Brownell | f29fc25 | 2005-08-31 09:52:31 -0700 | [diff] [blame] | 270 | if ((ll_mtu % dev->maxpacket) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | return -EDOM; |
| 272 | net->mtu = new_mtu; |
Jamie Painter | a99c194 | 2006-07-27 14:17:28 -0400 | [diff] [blame] | 273 | |
| 274 | dev->hard_mtu = net->mtu + net->hard_header_len; |
| 275 | if (dev->rx_urb_size == old_hard_mtu) { |
| 276 | dev->rx_urb_size = dev->hard_mtu; |
| 277 | if (dev->rx_urb_size > old_rx_urb_size) |
| 278 | usbnet_unlink_rx_urbs(dev); |
| 279 | } |
| 280 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | return 0; |
| 282 | } |
Stephen Hemminger | 777baa4 | 2009-03-20 19:35:54 +0000 | [diff] [blame] | 283 | EXPORT_SYMBOL_GPL(usbnet_change_mtu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | |
| 285 | /*-------------------------------------------------------------------------*/ |
| 286 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | /* some LK 2.4 HCDs oopsed if we freed or resubmitted urbs from |
| 288 | * completion callbacks. 2.5 should have fixed those bugs... |
| 289 | */ |
| 290 | |
David S. Miller | 8728b83 | 2005-08-09 19:25:21 -0700 | [diff] [blame] | 291 | static void defer_bh(struct usbnet *dev, struct sk_buff *skb, struct sk_buff_head *list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | unsigned long flags; |
| 294 | |
David S. Miller | 8728b83 | 2005-08-09 19:25:21 -0700 | [diff] [blame] | 295 | spin_lock_irqsave(&list->lock, flags); |
| 296 | __skb_unlink(skb, list); |
| 297 | spin_unlock(&list->lock); |
| 298 | spin_lock(&dev->done.lock); |
| 299 | __skb_queue_tail(&dev->done, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | if (dev->done.qlen == 1) |
David S. Miller | 8728b83 | 2005-08-09 19:25:21 -0700 | [diff] [blame] | 301 | tasklet_schedule(&dev->bh); |
| 302 | spin_unlock_irqrestore(&dev->done.lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | } |
| 304 | |
| 305 | /* some work can't be done in tasklets, so we use keventd |
| 306 | * |
| 307 | * NOTE: annoying asymmetry: if it's active, schedule_work() fails, |
| 308 | * but tasklet_schedule() doesn't. hope the failure is rare. |
| 309 | */ |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 310 | void usbnet_defer_kevent (struct usbnet *dev, int work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | { |
| 312 | set_bit (work, &dev->flags); |
| 313 | if (!schedule_work (&dev->kevent)) |
Joe Perches | 60b8675 | 2010-02-17 10:30:23 +0000 | [diff] [blame] | 314 | netdev_err(dev->net, "kevent %d may have been dropped\n", work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | else |
Joe Perches | 60b8675 | 2010-02-17 10:30:23 +0000 | [diff] [blame] | 316 | netdev_dbg(dev->net, "kevent %d scheduled\n", work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | } |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 318 | EXPORT_SYMBOL_GPL(usbnet_defer_kevent); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | |
| 320 | /*-------------------------------------------------------------------------*/ |
| 321 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 322 | static void rx_complete (struct urb *urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | |
David S. Miller | dacb397 | 2010-08-10 02:50:55 -0700 | [diff] [blame] | 324 | static int rx_submit (struct usbnet *dev, struct urb *urb, gfp_t flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | { |
| 326 | struct sk_buff *skb; |
| 327 | struct skb_data *entry; |
| 328 | int retval = 0; |
| 329 | unsigned long lockflags; |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 330 | size_t size = dev->rx_urb_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | |
Eric Dumazet | 7bdd402 | 2012-03-14 06:56:25 +0000 | [diff] [blame] | 332 | skb = __netdev_alloc_skb_ip_align(dev->net, size, flags); |
| 333 | if (!skb) { |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 334 | netif_dbg(dev, rx_err, dev->net, "no rx skb\n"); |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 335 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | usb_free_urb (urb); |
David S. Miller | dacb397 | 2010-08-10 02:50:55 -0700 | [diff] [blame] | 337 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | |
| 340 | entry = (struct skb_data *) skb->cb; |
| 341 | entry->urb = urb; |
| 342 | entry->dev = dev; |
| 343 | entry->state = rx_start; |
| 344 | entry->length = 0; |
| 345 | |
| 346 | usb_fill_bulk_urb (urb, dev->udev, dev->in, |
| 347 | skb->data, size, rx_complete, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | |
| 349 | spin_lock_irqsave (&dev->rxq.lock, lockflags); |
| 350 | |
Joe Perches | 8e95a20 | 2009-12-03 07:58:21 +0000 | [diff] [blame] | 351 | if (netif_running (dev->net) && |
| 352 | netif_device_present (dev->net) && |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 353 | !test_bit (EVENT_RX_HALT, &dev->flags) && |
| 354 | !test_bit (EVENT_DEV_ASLEEP, &dev->flags)) { |
David Brownell | 18ab458 | 2007-05-25 12:31:32 -0700 | [diff] [blame] | 355 | switch (retval = usb_submit_urb (urb, GFP_ATOMIC)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | case -EPIPE: |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 357 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | break; |
| 359 | case -ENOMEM: |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 360 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | break; |
| 362 | case -ENODEV: |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 363 | netif_dbg(dev, ifdown, dev->net, "device gone\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | netif_device_detach (dev->net); |
| 365 | break; |
David S. Miller | dacb397 | 2010-08-10 02:50:55 -0700 | [diff] [blame] | 366 | case -EHOSTUNREACH: |
| 367 | retval = -ENOLINK; |
| 368 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | default: |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 370 | netif_dbg(dev, rx_err, dev->net, |
| 371 | "rx submit, %d\n", retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | tasklet_schedule (&dev->bh); |
| 373 | break; |
| 374 | case 0: |
| 375 | __skb_queue_tail (&dev->rxq, skb); |
| 376 | } |
| 377 | } else { |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 378 | netif_dbg(dev, ifdown, dev->net, "rx: stopped\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | retval = -ENOLINK; |
| 380 | } |
| 381 | spin_unlock_irqrestore (&dev->rxq.lock, lockflags); |
| 382 | if (retval) { |
| 383 | dev_kfree_skb_any (skb); |
| 384 | usb_free_urb (urb); |
| 385 | } |
David S. Miller | dacb397 | 2010-08-10 02:50:55 -0700 | [diff] [blame] | 386 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | } |
| 388 | |
| 389 | |
| 390 | /*-------------------------------------------------------------------------*/ |
| 391 | |
| 392 | static inline void rx_process (struct usbnet *dev, struct sk_buff *skb) |
| 393 | { |
Joe Perches | 8e95a20 | 2009-12-03 07:58:21 +0000 | [diff] [blame] | 394 | if (dev->driver_info->rx_fixup && |
Andrzej Zaborowski | 7a635ea | 2011-03-28 12:56:33 +0000 | [diff] [blame] | 395 | !dev->driver_info->rx_fixup (dev, skb)) { |
| 396 | /* With RX_ASSEMBLE, rx_fixup() must update counters */ |
| 397 | if (!(dev->driver_info->flags & FLAG_RX_ASSEMBLE)) |
| 398 | dev->net->stats.rx_errors++; |
| 399 | goto done; |
| 400 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | // else network stack removes extra byte if we forced a short packet |
| 402 | |
Alexey Orishko | 073285f | 2010-11-29 23:23:27 +0000 | [diff] [blame] | 403 | if (skb->len) { |
| 404 | /* all data was already cloned from skb inside the driver */ |
| 405 | if (dev->driver_info->flags & FLAG_MULTI_PACKET) |
| 406 | dev_kfree_skb_any(skb); |
| 407 | else |
| 408 | usbnet_skb_return(dev, skb); |
| 409 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | } |
Alexey Orishko | 073285f | 2010-11-29 23:23:27 +0000 | [diff] [blame] | 411 | |
| 412 | netif_dbg(dev, rx_err, dev->net, "drop\n"); |
Alexey Orishko | 073285f | 2010-11-29 23:23:27 +0000 | [diff] [blame] | 413 | dev->net->stats.rx_errors++; |
Andrzej Zaborowski | 7a635ea | 2011-03-28 12:56:33 +0000 | [diff] [blame] | 414 | done: |
Alexey Orishko | 073285f | 2010-11-29 23:23:27 +0000 | [diff] [blame] | 415 | skb_queue_tail(&dev->done, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | } |
| 417 | |
| 418 | /*-------------------------------------------------------------------------*/ |
| 419 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 420 | static void rx_complete (struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | { |
| 422 | struct sk_buff *skb = (struct sk_buff *) urb->context; |
| 423 | struct skb_data *entry = (struct skb_data *) skb->cb; |
| 424 | struct usbnet *dev = entry->dev; |
| 425 | int urb_status = urb->status; |
| 426 | |
| 427 | skb_put (skb, urb->actual_length); |
| 428 | entry->state = rx_done; |
| 429 | entry->urb = NULL; |
| 430 | |
| 431 | switch (urb_status) { |
David Brownell | 18ab458 | 2007-05-25 12:31:32 -0700 | [diff] [blame] | 432 | /* success */ |
| 433 | case 0: |
David Brownell | f29fc25 | 2005-08-31 09:52:31 -0700 | [diff] [blame] | 434 | if (skb->len < dev->net->hard_header_len) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | entry->state = rx_cleanup; |
Herbert Xu | 7963837 | 2009-06-29 16:53:28 +0000 | [diff] [blame] | 436 | dev->net->stats.rx_errors++; |
| 437 | dev->net->stats.rx_length_errors++; |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 438 | netif_dbg(dev, rx_err, dev->net, |
| 439 | "rx length %d\n", skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | } |
| 441 | break; |
| 442 | |
David Brownell | 18ab458 | 2007-05-25 12:31:32 -0700 | [diff] [blame] | 443 | /* stalls need manual reset. this is rare ... except that |
| 444 | * when going through USB 2.0 TTs, unplug appears this way. |
Jean Delvare | 3ac49a1 | 2009-06-04 16:20:28 +0200 | [diff] [blame] | 445 | * we avoid the highspeed version of the ETIMEDOUT/EILSEQ |
David Brownell | 18ab458 | 2007-05-25 12:31:32 -0700 | [diff] [blame] | 446 | * storm, recovering as needed. |
| 447 | */ |
| 448 | case -EPIPE: |
Herbert Xu | 7963837 | 2009-06-29 16:53:28 +0000 | [diff] [blame] | 449 | dev->net->stats.rx_errors++; |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 450 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | // FALLTHROUGH |
| 452 | |
David Brownell | 18ab458 | 2007-05-25 12:31:32 -0700 | [diff] [blame] | 453 | /* software-driven interface shutdown */ |
| 454 | case -ECONNRESET: /* async unlink */ |
| 455 | case -ESHUTDOWN: /* hardware gone */ |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 456 | netif_dbg(dev, ifdown, dev->net, |
| 457 | "rx shutdown, code %d\n", urb_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | goto block; |
| 459 | |
David Brownell | 18ab458 | 2007-05-25 12:31:32 -0700 | [diff] [blame] | 460 | /* we get controller i/o faults during khubd disconnect() delays. |
| 461 | * throttle down resubmits, to avoid log floods; just temporarily, |
| 462 | * so we still recover when the fault isn't a khubd delay. |
| 463 | */ |
| 464 | case -EPROTO: |
| 465 | case -ETIME: |
| 466 | case -EILSEQ: |
Herbert Xu | 7963837 | 2009-06-29 16:53:28 +0000 | [diff] [blame] | 467 | dev->net->stats.rx_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | if (!timer_pending (&dev->delay)) { |
| 469 | mod_timer (&dev->delay, jiffies + THROTTLE_JIFFIES); |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 470 | netif_dbg(dev, link, dev->net, |
| 471 | "rx throttle %d\n", urb_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | } |
| 473 | block: |
| 474 | entry->state = rx_cleanup; |
| 475 | entry->urb = urb; |
| 476 | urb = NULL; |
| 477 | break; |
| 478 | |
David Brownell | 18ab458 | 2007-05-25 12:31:32 -0700 | [diff] [blame] | 479 | /* data overrun ... flush fifo? */ |
| 480 | case -EOVERFLOW: |
Herbert Xu | 7963837 | 2009-06-29 16:53:28 +0000 | [diff] [blame] | 481 | dev->net->stats.rx_over_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | // FALLTHROUGH |
David Brownell | cb1cebb | 2007-02-15 18:52:30 -0800 | [diff] [blame] | 483 | |
David Brownell | 18ab458 | 2007-05-25 12:31:32 -0700 | [diff] [blame] | 484 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | entry->state = rx_cleanup; |
Herbert Xu | 7963837 | 2009-06-29 16:53:28 +0000 | [diff] [blame] | 486 | dev->net->stats.rx_errors++; |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 487 | netif_dbg(dev, rx_err, dev->net, "rx status %d\n", urb_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | break; |
| 489 | } |
| 490 | |
David S. Miller | 8728b83 | 2005-08-09 19:25:21 -0700 | [diff] [blame] | 491 | defer_bh(dev, skb, &dev->rxq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | |
| 493 | if (urb) { |
Joe Perches | 8e95a20 | 2009-12-03 07:58:21 +0000 | [diff] [blame] | 494 | if (netif_running (dev->net) && |
| 495 | !test_bit (EVENT_RX_HALT, &dev->flags)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | rx_submit (dev, urb, GFP_ATOMIC); |
Oliver Neukum | 8a78335 | 2012-03-03 18:45:07 +0100 | [diff] [blame] | 497 | usb_mark_last_busy(dev->udev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | return; |
| 499 | } |
| 500 | usb_free_urb (urb); |
| 501 | } |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 502 | netif_dbg(dev, rx_err, dev->net, "no read resubmitted\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | } |
| 504 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 505 | static void intr_complete (struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | { |
| 507 | struct usbnet *dev = urb->context; |
| 508 | int status = urb->status; |
| 509 | |
| 510 | switch (status) { |
David Brownell | 18ab458 | 2007-05-25 12:31:32 -0700 | [diff] [blame] | 511 | /* success */ |
| 512 | case 0: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | dev->driver_info->status(dev, urb); |
| 514 | break; |
| 515 | |
David Brownell | 18ab458 | 2007-05-25 12:31:32 -0700 | [diff] [blame] | 516 | /* software-driven interface shutdown */ |
| 517 | case -ENOENT: /* urb killed */ |
| 518 | case -ESHUTDOWN: /* hardware gone */ |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 519 | netif_dbg(dev, ifdown, dev->net, |
| 520 | "intr shutdown, code %d\n", status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | return; |
| 522 | |
David Brownell | 18ab458 | 2007-05-25 12:31:32 -0700 | [diff] [blame] | 523 | /* NOTE: not throttling like RX/TX, since this endpoint |
| 524 | * already polls infrequently |
| 525 | */ |
| 526 | default: |
Joe Perches | 60b8675 | 2010-02-17 10:30:23 +0000 | [diff] [blame] | 527 | netdev_dbg(dev->net, "intr status %d\n", status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | break; |
| 529 | } |
| 530 | |
| 531 | if (!netif_running (dev->net)) |
| 532 | return; |
| 533 | |
| 534 | memset(urb->transfer_buffer, 0, urb->transfer_buffer_length); |
| 535 | status = usb_submit_urb (urb, GFP_ATOMIC); |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 536 | if (status != 0) |
| 537 | netif_err(dev, timer, dev->net, |
| 538 | "intr resubmit --> %d\n", status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | } |
| 540 | |
| 541 | /*-------------------------------------------------------------------------*/ |
Jussi Kivilinna | 7834ddb | 2009-08-11 22:57:16 +0300 | [diff] [blame] | 542 | void usbnet_pause_rx(struct usbnet *dev) |
| 543 | { |
| 544 | set_bit(EVENT_RX_PAUSED, &dev->flags); |
| 545 | |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 546 | netif_dbg(dev, rx_status, dev->net, "paused rx queue enabled\n"); |
Jussi Kivilinna | 7834ddb | 2009-08-11 22:57:16 +0300 | [diff] [blame] | 547 | } |
| 548 | EXPORT_SYMBOL_GPL(usbnet_pause_rx); |
| 549 | |
| 550 | void usbnet_resume_rx(struct usbnet *dev) |
| 551 | { |
| 552 | struct sk_buff *skb; |
| 553 | int num = 0; |
| 554 | |
| 555 | clear_bit(EVENT_RX_PAUSED, &dev->flags); |
| 556 | |
| 557 | while ((skb = skb_dequeue(&dev->rxq_pause)) != NULL) { |
| 558 | usbnet_skb_return(dev, skb); |
| 559 | num++; |
| 560 | } |
| 561 | |
| 562 | tasklet_schedule(&dev->bh); |
| 563 | |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 564 | netif_dbg(dev, rx_status, dev->net, |
| 565 | "paused rx queue disabled, %d skbs requeued\n", num); |
Jussi Kivilinna | 7834ddb | 2009-08-11 22:57:16 +0300 | [diff] [blame] | 566 | } |
| 567 | EXPORT_SYMBOL_GPL(usbnet_resume_rx); |
| 568 | |
| 569 | void usbnet_purge_paused_rxq(struct usbnet *dev) |
| 570 | { |
| 571 | skb_queue_purge(&dev->rxq_pause); |
| 572 | } |
| 573 | EXPORT_SYMBOL_GPL(usbnet_purge_paused_rxq); |
| 574 | |
| 575 | /*-------------------------------------------------------------------------*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | |
| 577 | // unlink pending rx/tx; completion handlers do all other cleanup |
| 578 | |
| 579 | static int unlink_urbs (struct usbnet *dev, struct sk_buff_head *q) |
| 580 | { |
| 581 | unsigned long flags; |
| 582 | struct sk_buff *skb, *skbnext; |
| 583 | int count = 0; |
| 584 | |
| 585 | spin_lock_irqsave (&q->lock, flags); |
David S. Miller | 83bfba5 | 2008-09-22 20:18:47 -0700 | [diff] [blame] | 586 | skb_queue_walk_safe(q, skb, skbnext) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | struct skb_data *entry; |
| 588 | struct urb *urb; |
| 589 | int retval; |
| 590 | |
| 591 | entry = (struct skb_data *) skb->cb; |
| 592 | urb = entry->urb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | |
tom.leiming@gmail.com | 0956a8c | 2012-03-22 03:22:18 +0000 | [diff] [blame] | 594 | /* |
| 595 | * Get reference count of the URB to avoid it to be |
| 596 | * freed during usb_unlink_urb, which may trigger |
| 597 | * use-after-free problem inside usb_unlink_urb since |
| 598 | * usb_unlink_urb is always racing with .complete |
| 599 | * handler(include defer_bh). |
| 600 | */ |
| 601 | usb_get_urb(urb); |
Sebastian Siewior | 4231d47 | 2012-03-07 10:19:28 +0000 | [diff] [blame] | 602 | spin_unlock_irqrestore(&q->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | // during some PM-driven resume scenarios, |
| 604 | // these (async) unlinks complete immediately |
| 605 | retval = usb_unlink_urb (urb); |
| 606 | if (retval != -EINPROGRESS && retval != 0) |
Joe Perches | 60b8675 | 2010-02-17 10:30:23 +0000 | [diff] [blame] | 607 | netdev_dbg(dev->net, "unlink urb err, %d\n", retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | else |
| 609 | count++; |
tom.leiming@gmail.com | 0956a8c | 2012-03-22 03:22:18 +0000 | [diff] [blame] | 610 | usb_put_urb(urb); |
Sebastian Siewior | 4231d47 | 2012-03-07 10:19:28 +0000 | [diff] [blame] | 611 | spin_lock_irqsave(&q->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | } |
| 613 | spin_unlock_irqrestore (&q->lock, flags); |
| 614 | return count; |
| 615 | } |
| 616 | |
Jamie Painter | a99c194 | 2006-07-27 14:17:28 -0400 | [diff] [blame] | 617 | // Flush all pending rx urbs |
| 618 | // minidrivers may need to do this when the MTU changes |
| 619 | |
| 620 | void usbnet_unlink_rx_urbs(struct usbnet *dev) |
| 621 | { |
| 622 | if (netif_running(dev->net)) { |
| 623 | (void) unlink_urbs (dev, &dev->rxq); |
| 624 | tasklet_schedule(&dev->bh); |
| 625 | } |
| 626 | } |
| 627 | EXPORT_SYMBOL_GPL(usbnet_unlink_rx_urbs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | |
| 629 | /*-------------------------------------------------------------------------*/ |
| 630 | |
| 631 | // precondition: never called in_interrupt |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 632 | static void usbnet_terminate_urbs(struct usbnet *dev) |
| 633 | { |
| 634 | DECLARE_WAIT_QUEUE_HEAD_ONSTACK(unlink_wakeup); |
| 635 | DECLARE_WAITQUEUE(wait, current); |
| 636 | int temp; |
| 637 | |
| 638 | /* ensure there are no more active urbs */ |
| 639 | add_wait_queue(&unlink_wakeup, &wait); |
| 640 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 641 | dev->wait = &unlink_wakeup; |
| 642 | temp = unlink_urbs(dev, &dev->txq) + |
| 643 | unlink_urbs(dev, &dev->rxq); |
| 644 | |
| 645 | /* maybe wait for deletions to finish. */ |
| 646 | while (!skb_queue_empty(&dev->rxq) |
| 647 | && !skb_queue_empty(&dev->txq) |
| 648 | && !skb_queue_empty(&dev->done)) { |
Kulikov Vasiliy | 66cc42a4 | 2010-07-25 22:25:42 +0000 | [diff] [blame] | 649 | schedule_timeout(msecs_to_jiffies(UNLINK_TIMEOUT_MS)); |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 650 | set_current_state(TASK_UNINTERRUPTIBLE); |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 651 | netif_dbg(dev, ifdown, dev->net, |
| 652 | "waited for %d urb completions\n", temp); |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 653 | } |
| 654 | set_current_state(TASK_RUNNING); |
| 655 | dev->wait = NULL; |
| 656 | remove_wait_queue(&unlink_wakeup, &wait); |
| 657 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | |
Stephen Hemminger | 777baa4 | 2009-03-20 19:35:54 +0000 | [diff] [blame] | 659 | int usbnet_stop (struct net_device *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | { |
| 661 | struct usbnet *dev = netdev_priv(net); |
Jussi Kivilinna | a33e9e7 | 2009-06-16 17:17:27 +0300 | [diff] [blame] | 662 | struct driver_info *info = dev->driver_info; |
Jussi Kivilinna | a33e9e7 | 2009-06-16 17:17:27 +0300 | [diff] [blame] | 663 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | |
Ming Lei | 75bd0cb | 2011-04-28 22:37:09 +0000 | [diff] [blame] | 665 | clear_bit(EVENT_DEV_OPEN, &dev->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | netif_stop_queue (net); |
| 667 | |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 668 | netif_info(dev, ifdown, dev->net, |
Ben Hutchings | 8ccef43 | 2010-06-08 08:20:59 +0000 | [diff] [blame] | 669 | "stop stats: rx/tx %lu/%lu, errs %lu/%lu\n", |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 670 | net->stats.rx_packets, net->stats.tx_packets, |
| 671 | net->stats.rx_errors, net->stats.tx_errors); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | |
Jussi Kivilinna | a33e9e7 | 2009-06-16 17:17:27 +0300 | [diff] [blame] | 673 | /* allow minidriver to stop correctly (wireless devices to turn off |
| 674 | * radio etc) */ |
| 675 | if (info->stop) { |
| 676 | retval = info->stop(dev); |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 677 | if (retval < 0) |
| 678 | netif_info(dev, ifdown, dev->net, |
| 679 | "stop fail (%d) usbnet usb-%s-%s, %s\n", |
| 680 | retval, |
| 681 | dev->udev->bus->bus_name, dev->udev->devpath, |
| 682 | info->description); |
Jussi Kivilinna | a33e9e7 | 2009-06-16 17:17:27 +0300 | [diff] [blame] | 683 | } |
| 684 | |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 685 | if (!(info->flags & FLAG_AVOID_UNLINK_URBS)) |
| 686 | usbnet_terminate_urbs(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | |
| 688 | usb_kill_urb(dev->interrupt); |
| 689 | |
Jussi Kivilinna | 7834ddb | 2009-08-11 22:57:16 +0300 | [diff] [blame] | 690 | usbnet_purge_paused_rxq(dev); |
| 691 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | /* deferred work (task, timer, softirq) must also stop. |
| 693 | * can't flush_scheduled_work() until we drop rtnl (later), |
| 694 | * else workers could deadlock; so make workers a NOP. |
| 695 | */ |
| 696 | dev->flags = 0; |
| 697 | del_timer_sync (&dev->delay); |
| 698 | tasklet_kill (&dev->bh); |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 699 | if (info->manage_power) |
| 700 | info->manage_power(dev, 0); |
| 701 | else |
| 702 | usb_autopm_put_interface(dev->intf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | |
| 704 | return 0; |
| 705 | } |
Stephen Hemminger | 777baa4 | 2009-03-20 19:35:54 +0000 | [diff] [blame] | 706 | EXPORT_SYMBOL_GPL(usbnet_stop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | |
| 708 | /*-------------------------------------------------------------------------*/ |
| 709 | |
| 710 | // posts reads, and enables write queuing |
| 711 | |
| 712 | // precondition: never called in_interrupt |
| 713 | |
Stephen Hemminger | 777baa4 | 2009-03-20 19:35:54 +0000 | [diff] [blame] | 714 | int usbnet_open (struct net_device *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | { |
| 716 | struct usbnet *dev = netdev_priv(net); |
Oliver Neukum | a11a654 | 2007-08-03 13:52:19 +0200 | [diff] [blame] | 717 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | struct driver_info *info = dev->driver_info; |
| 719 | |
Oliver Neukum | a11a654 | 2007-08-03 13:52:19 +0200 | [diff] [blame] | 720 | if ((retval = usb_autopm_get_interface(dev->intf)) < 0) { |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 721 | netif_info(dev, ifup, dev->net, |
| 722 | "resumption fail (%d) usbnet usb-%s-%s, %s\n", |
| 723 | retval, |
| 724 | dev->udev->bus->bus_name, |
| 725 | dev->udev->devpath, |
| 726 | info->description); |
Oliver Neukum | a11a654 | 2007-08-03 13:52:19 +0200 | [diff] [blame] | 727 | goto done_nopm; |
| 728 | } |
| 729 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | // put into "known safe" state |
| 731 | if (info->reset && (retval = info->reset (dev)) < 0) { |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 732 | netif_info(dev, ifup, dev->net, |
| 733 | "open reset fail (%d) usbnet usb-%s-%s, %s\n", |
| 734 | retval, |
| 735 | dev->udev->bus->bus_name, |
| 736 | dev->udev->devpath, |
| 737 | info->description); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | goto done; |
| 739 | } |
| 740 | |
| 741 | // insist peer be connected |
| 742 | if (info->check_connect && (retval = info->check_connect (dev)) < 0) { |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 743 | netif_dbg(dev, ifup, dev->net, "can't open; %d\n", retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | goto done; |
| 745 | } |
| 746 | |
| 747 | /* start any status interrupt transfer */ |
| 748 | if (dev->interrupt) { |
| 749 | retval = usb_submit_urb (dev->interrupt, GFP_KERNEL); |
| 750 | if (retval < 0) { |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 751 | netif_err(dev, ifup, dev->net, |
| 752 | "intr submit %d\n", retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | goto done; |
| 754 | } |
| 755 | } |
| 756 | |
Paul Stewart | 68972ef | 2011-04-28 05:43:37 +0000 | [diff] [blame] | 757 | set_bit(EVENT_DEV_OPEN, &dev->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | netif_start_queue (net); |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 759 | netif_info(dev, ifup, dev->net, |
| 760 | "open: enable queueing (rx %d, tx %d) mtu %d %s framing\n", |
| 761 | (int)RX_QLEN(dev), (int)TX_QLEN(dev), |
| 762 | dev->net->mtu, |
| 763 | (dev->driver_info->flags & FLAG_FRAMING_NC) ? "NetChip" : |
| 764 | (dev->driver_info->flags & FLAG_FRAMING_GL) ? "GeneSys" : |
| 765 | (dev->driver_info->flags & FLAG_FRAMING_Z) ? "Zaurus" : |
| 766 | (dev->driver_info->flags & FLAG_FRAMING_RN) ? "RNDIS" : |
| 767 | (dev->driver_info->flags & FLAG_FRAMING_AX) ? "ASIX" : |
| 768 | "simple"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | |
| 770 | // delay posting reads until we're fully open |
| 771 | tasklet_schedule (&dev->bh); |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 772 | if (info->manage_power) { |
| 773 | retval = info->manage_power(dev, 1); |
| 774 | if (retval < 0) |
| 775 | goto done; |
| 776 | usb_autopm_put_interface(dev->intf); |
| 777 | } |
Oliver Neukum | a11a654 | 2007-08-03 13:52:19 +0200 | [diff] [blame] | 778 | return retval; |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 779 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | done: |
Oliver Neukum | a11a654 | 2007-08-03 13:52:19 +0200 | [diff] [blame] | 781 | usb_autopm_put_interface(dev->intf); |
| 782 | done_nopm: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | return retval; |
| 784 | } |
Stephen Hemminger | 777baa4 | 2009-03-20 19:35:54 +0000 | [diff] [blame] | 785 | EXPORT_SYMBOL_GPL(usbnet_open); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | |
| 787 | /*-------------------------------------------------------------------------*/ |
| 788 | |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 789 | /* ethtool methods; minidrivers may need to add some more, but |
| 790 | * they'll probably want to use this base set. |
| 791 | */ |
| 792 | |
Arnd Bergmann | c41286f | 2006-10-09 00:08:01 +0200 | [diff] [blame] | 793 | int usbnet_get_settings (struct net_device *net, struct ethtool_cmd *cmd) |
| 794 | { |
| 795 | struct usbnet *dev = netdev_priv(net); |
| 796 | |
| 797 | if (!dev->mii.mdio_read) |
| 798 | return -EOPNOTSUPP; |
| 799 | |
| 800 | return mii_ethtool_gset(&dev->mii, cmd); |
| 801 | } |
| 802 | EXPORT_SYMBOL_GPL(usbnet_get_settings); |
| 803 | |
| 804 | int usbnet_set_settings (struct net_device *net, struct ethtool_cmd *cmd) |
| 805 | { |
| 806 | struct usbnet *dev = netdev_priv(net); |
| 807 | int retval; |
| 808 | |
| 809 | if (!dev->mii.mdio_write) |
| 810 | return -EOPNOTSUPP; |
| 811 | |
| 812 | retval = mii_ethtool_sset(&dev->mii, cmd); |
| 813 | |
| 814 | /* link speed/duplex might have changed */ |
| 815 | if (dev->driver_info->link_reset) |
| 816 | dev->driver_info->link_reset(dev); |
| 817 | |
| 818 | return retval; |
| 819 | |
| 820 | } |
| 821 | EXPORT_SYMBOL_GPL(usbnet_set_settings); |
| 822 | |
Arnd Bergmann | c41286f | 2006-10-09 00:08:01 +0200 | [diff] [blame] | 823 | u32 usbnet_get_link (struct net_device *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | { |
| 825 | struct usbnet *dev = netdev_priv(net); |
| 826 | |
David Brownell | f29fc25 | 2005-08-31 09:52:31 -0700 | [diff] [blame] | 827 | /* If a check_connect is defined, return its result */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | if (dev->driver_info->check_connect) |
| 829 | return dev->driver_info->check_connect (dev) == 0; |
| 830 | |
Arnd Bergmann | c41286f | 2006-10-09 00:08:01 +0200 | [diff] [blame] | 831 | /* if the device has mii operations, use those */ |
| 832 | if (dev->mii.mdio_read) |
| 833 | return mii_link_ok(&dev->mii); |
| 834 | |
Bjørn Mork | 05ffb3e | 2009-03-01 20:45:40 -0800 | [diff] [blame] | 835 | /* Otherwise, dtrt for drivers calling netif_carrier_{on,off} */ |
| 836 | return ethtool_op_get_link(net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | } |
Arnd Bergmann | c41286f | 2006-10-09 00:08:01 +0200 | [diff] [blame] | 838 | EXPORT_SYMBOL_GPL(usbnet_get_link); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | |
David Brownell | 18ee91fa | 2006-11-02 12:29:12 -0800 | [diff] [blame] | 840 | int usbnet_nway_reset(struct net_device *net) |
| 841 | { |
| 842 | struct usbnet *dev = netdev_priv(net); |
| 843 | |
| 844 | if (!dev->mii.mdio_write) |
| 845 | return -EOPNOTSUPP; |
| 846 | |
| 847 | return mii_nway_restart(&dev->mii); |
| 848 | } |
| 849 | EXPORT_SYMBOL_GPL(usbnet_nway_reset); |
| 850 | |
David Brownell | 18ee91fa | 2006-11-02 12:29:12 -0800 | [diff] [blame] | 851 | void usbnet_get_drvinfo (struct net_device *net, struct ethtool_drvinfo *info) |
| 852 | { |
| 853 | struct usbnet *dev = netdev_priv(net); |
| 854 | |
David Brownell | 296c024 | 2007-04-17 16:10:10 -0700 | [diff] [blame] | 855 | strncpy (info->driver, dev->driver_name, sizeof info->driver); |
David Brownell | 18ee91fa | 2006-11-02 12:29:12 -0800 | [diff] [blame] | 856 | strncpy (info->version, DRIVER_VERSION, sizeof info->version); |
| 857 | strncpy (info->fw_version, dev->driver_info->description, |
| 858 | sizeof info->fw_version); |
| 859 | usb_make_path (dev->udev, info->bus_info, sizeof info->bus_info); |
| 860 | } |
| 861 | EXPORT_SYMBOL_GPL(usbnet_get_drvinfo); |
| 862 | |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 863 | u32 usbnet_get_msglevel (struct net_device *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | { |
| 865 | struct usbnet *dev = netdev_priv(net); |
| 866 | |
| 867 | return dev->msg_enable; |
| 868 | } |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 869 | EXPORT_SYMBOL_GPL(usbnet_get_msglevel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 871 | void usbnet_set_msglevel (struct net_device *net, u32 level) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | { |
| 873 | struct usbnet *dev = netdev_priv(net); |
| 874 | |
| 875 | dev->msg_enable = level; |
| 876 | } |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 877 | EXPORT_SYMBOL_GPL(usbnet_set_msglevel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 879 | /* drivers may override default ethtool_ops in their bind() routine */ |
Stephen Hemminger | 0fc0b73 | 2009-09-02 01:03:33 -0700 | [diff] [blame] | 880 | static const struct ethtool_ops usbnet_ethtool_ops = { |
Arnd Bergmann | c41286f | 2006-10-09 00:08:01 +0200 | [diff] [blame] | 881 | .get_settings = usbnet_get_settings, |
| 882 | .set_settings = usbnet_set_settings, |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 883 | .get_link = usbnet_get_link, |
Arnd Bergmann | c41286f | 2006-10-09 00:08:01 +0200 | [diff] [blame] | 884 | .nway_reset = usbnet_nway_reset, |
David Brownell | 18ee91fa | 2006-11-02 12:29:12 -0800 | [diff] [blame] | 885 | .get_drvinfo = usbnet_get_drvinfo, |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 886 | .get_msglevel = usbnet_get_msglevel, |
| 887 | .set_msglevel = usbnet_set_msglevel, |
| 888 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | |
| 890 | /*-------------------------------------------------------------------------*/ |
| 891 | |
| 892 | /* work that cannot be done in interrupt context uses keventd. |
| 893 | * |
| 894 | * NOTE: with 2.5 we could do more of this using completion callbacks, |
| 895 | * especially now that control transfers can be queued. |
| 896 | */ |
| 897 | static void |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 898 | kevent (struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 900 | struct usbnet *dev = |
| 901 | container_of(work, struct usbnet, kevent); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | int status; |
| 903 | |
| 904 | /* usb_clear_halt() needs a thread context */ |
| 905 | if (test_bit (EVENT_TX_HALT, &dev->flags)) { |
| 906 | unlink_urbs (dev, &dev->txq); |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 907 | status = usb_autopm_get_interface(dev->intf); |
| 908 | if (status < 0) |
| 909 | goto fail_pipe; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | status = usb_clear_halt (dev->udev, dev->out); |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 911 | usb_autopm_put_interface(dev->intf); |
Joe Perches | 8e95a20 | 2009-12-03 07:58:21 +0000 | [diff] [blame] | 912 | if (status < 0 && |
| 913 | status != -EPIPE && |
| 914 | status != -ESHUTDOWN) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | if (netif_msg_tx_err (dev)) |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 916 | fail_pipe: |
Joe Perches | 60b8675 | 2010-02-17 10:30:23 +0000 | [diff] [blame] | 917 | netdev_err(dev->net, "can't clear tx halt, status %d\n", |
| 918 | status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | } else { |
| 920 | clear_bit (EVENT_TX_HALT, &dev->flags); |
David Brownell | f29fc25 | 2005-08-31 09:52:31 -0700 | [diff] [blame] | 921 | if (status != -ESHUTDOWN) |
| 922 | netif_wake_queue (dev->net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | } |
| 924 | } |
| 925 | if (test_bit (EVENT_RX_HALT, &dev->flags)) { |
| 926 | unlink_urbs (dev, &dev->rxq); |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 927 | status = usb_autopm_get_interface(dev->intf); |
| 928 | if (status < 0) |
| 929 | goto fail_halt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | status = usb_clear_halt (dev->udev, dev->in); |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 931 | usb_autopm_put_interface(dev->intf); |
Joe Perches | 8e95a20 | 2009-12-03 07:58:21 +0000 | [diff] [blame] | 932 | if (status < 0 && |
| 933 | status != -EPIPE && |
| 934 | status != -ESHUTDOWN) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | if (netif_msg_rx_err (dev)) |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 936 | fail_halt: |
Joe Perches | 60b8675 | 2010-02-17 10:30:23 +0000 | [diff] [blame] | 937 | netdev_err(dev->net, "can't clear rx halt, status %d\n", |
| 938 | status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | } else { |
| 940 | clear_bit (EVENT_RX_HALT, &dev->flags); |
| 941 | tasklet_schedule (&dev->bh); |
| 942 | } |
| 943 | } |
| 944 | |
| 945 | /* tasklet could resubmit itself forever if memory is tight */ |
| 946 | if (test_bit (EVENT_RX_MEMORY, &dev->flags)) { |
| 947 | struct urb *urb = NULL; |
David S. Miller | dacb397 | 2010-08-10 02:50:55 -0700 | [diff] [blame] | 948 | int resched = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | |
| 950 | if (netif_running (dev->net)) |
| 951 | urb = usb_alloc_urb (0, GFP_KERNEL); |
| 952 | else |
| 953 | clear_bit (EVENT_RX_MEMORY, &dev->flags); |
| 954 | if (urb != NULL) { |
| 955 | clear_bit (EVENT_RX_MEMORY, &dev->flags); |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 956 | status = usb_autopm_get_interface(dev->intf); |
Jesper Juhl | ab60707 | 2011-02-10 10:58:45 +0000 | [diff] [blame] | 957 | if (status < 0) { |
| 958 | usb_free_urb(urb); |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 959 | goto fail_lowmem; |
Jesper Juhl | ab60707 | 2011-02-10 10:58:45 +0000 | [diff] [blame] | 960 | } |
David S. Miller | dacb397 | 2010-08-10 02:50:55 -0700 | [diff] [blame] | 961 | if (rx_submit (dev, urb, GFP_KERNEL) == -ENOLINK) |
| 962 | resched = 0; |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 963 | usb_autopm_put_interface(dev->intf); |
| 964 | fail_lowmem: |
David S. Miller | dacb397 | 2010-08-10 02:50:55 -0700 | [diff] [blame] | 965 | if (resched) |
| 966 | tasklet_schedule (&dev->bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | } |
| 968 | } |
| 969 | |
David Hollis | 7ea13c9 | 2005-04-22 15:07:02 -0700 | [diff] [blame] | 970 | if (test_bit (EVENT_LINK_RESET, &dev->flags)) { |
David Brownell | cb1cebb | 2007-02-15 18:52:30 -0800 | [diff] [blame] | 971 | struct driver_info *info = dev->driver_info; |
David Hollis | 7ea13c9 | 2005-04-22 15:07:02 -0700 | [diff] [blame] | 972 | int retval = 0; |
| 973 | |
| 974 | clear_bit (EVENT_LINK_RESET, &dev->flags); |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 975 | status = usb_autopm_get_interface(dev->intf); |
| 976 | if (status < 0) |
| 977 | goto skip_reset; |
David Hollis | 7ea13c9 | 2005-04-22 15:07:02 -0700 | [diff] [blame] | 978 | if(info->link_reset && (retval = info->link_reset(dev)) < 0) { |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 979 | usb_autopm_put_interface(dev->intf); |
| 980 | skip_reset: |
Joe Perches | 60b8675 | 2010-02-17 10:30:23 +0000 | [diff] [blame] | 981 | netdev_info(dev->net, "link reset failed (%d) usbnet usb-%s-%s, %s\n", |
| 982 | retval, |
| 983 | dev->udev->bus->bus_name, |
| 984 | dev->udev->devpath, |
| 985 | info->description); |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 986 | } else { |
| 987 | usb_autopm_put_interface(dev->intf); |
David Hollis | 7ea13c9 | 2005-04-22 15:07:02 -0700 | [diff] [blame] | 988 | } |
| 989 | } |
| 990 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | if (dev->flags) |
Joe Perches | 60b8675 | 2010-02-17 10:30:23 +0000 | [diff] [blame] | 992 | netdev_dbg(dev->net, "kevent done, flags = 0x%lx\n", dev->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | } |
| 994 | |
| 995 | /*-------------------------------------------------------------------------*/ |
| 996 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 997 | static void tx_complete (struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | { |
| 999 | struct sk_buff *skb = (struct sk_buff *) urb->context; |
| 1000 | struct skb_data *entry = (struct skb_data *) skb->cb; |
| 1001 | struct usbnet *dev = entry->dev; |
| 1002 | |
| 1003 | if (urb->status == 0) { |
Alexey Orishko | 073285f | 2010-11-29 23:23:27 +0000 | [diff] [blame] | 1004 | if (!(dev->driver_info->flags & FLAG_MULTI_PACKET)) |
| 1005 | dev->net->stats.tx_packets++; |
Herbert Xu | 7963837 | 2009-06-29 16:53:28 +0000 | [diff] [blame] | 1006 | dev->net->stats.tx_bytes += entry->length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | } else { |
Herbert Xu | 7963837 | 2009-06-29 16:53:28 +0000 | [diff] [blame] | 1008 | dev->net->stats.tx_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | |
| 1010 | switch (urb->status) { |
| 1011 | case -EPIPE: |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 1012 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | break; |
| 1014 | |
| 1015 | /* software-driven interface shutdown */ |
| 1016 | case -ECONNRESET: // async unlink |
| 1017 | case -ESHUTDOWN: // hardware gone |
| 1018 | break; |
| 1019 | |
| 1020 | // like rx, tx gets controller i/o faults during khubd delays |
| 1021 | // and so it uses the same throttling mechanism. |
Pete Zaitcev | 38e2bfc | 2006-09-18 22:49:02 -0700 | [diff] [blame] | 1022 | case -EPROTO: |
| 1023 | case -ETIME: |
| 1024 | case -EILSEQ: |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 1025 | usb_mark_last_busy(dev->udev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | if (!timer_pending (&dev->delay)) { |
| 1027 | mod_timer (&dev->delay, |
| 1028 | jiffies + THROTTLE_JIFFIES); |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 1029 | netif_dbg(dev, link, dev->net, |
| 1030 | "tx throttle %d\n", urb->status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | } |
| 1032 | netif_stop_queue (dev->net); |
| 1033 | break; |
| 1034 | default: |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 1035 | netif_dbg(dev, tx_err, dev->net, |
| 1036 | "tx err %d\n", entry->urb->status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | break; |
| 1038 | } |
| 1039 | } |
| 1040 | |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 1041 | usb_autopm_put_interface_async(dev->intf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | entry->state = tx_done; |
David S. Miller | 8728b83 | 2005-08-09 19:25:21 -0700 | [diff] [blame] | 1043 | defer_bh(dev, skb, &dev->txq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | } |
| 1045 | |
| 1046 | /*-------------------------------------------------------------------------*/ |
| 1047 | |
Stephen Hemminger | 777baa4 | 2009-03-20 19:35:54 +0000 | [diff] [blame] | 1048 | void usbnet_tx_timeout (struct net_device *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | { |
| 1050 | struct usbnet *dev = netdev_priv(net); |
| 1051 | |
| 1052 | unlink_urbs (dev, &dev->txq); |
| 1053 | tasklet_schedule (&dev->bh); |
| 1054 | |
| 1055 | // FIXME: device recovery -- reset? |
| 1056 | } |
Stephen Hemminger | 777baa4 | 2009-03-20 19:35:54 +0000 | [diff] [blame] | 1057 | EXPORT_SYMBOL_GPL(usbnet_tx_timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | |
| 1059 | /*-------------------------------------------------------------------------*/ |
| 1060 | |
Stephen Hemminger | 25a79c4 | 2009-08-31 19:50:45 +0000 | [diff] [blame] | 1061 | netdev_tx_t usbnet_start_xmit (struct sk_buff *skb, |
| 1062 | struct net_device *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | { |
| 1064 | struct usbnet *dev = netdev_priv(net); |
| 1065 | int length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | struct urb *urb = NULL; |
| 1067 | struct skb_data *entry; |
| 1068 | struct driver_info *info = dev->driver_info; |
| 1069 | unsigned long flags; |
Stephen Hemminger | 25a79c4 | 2009-08-31 19:50:45 +0000 | [diff] [blame] | 1070 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | |
Konstantin Khlebnikov | 23ba079 | 2011-11-07 05:54:58 +0000 | [diff] [blame] | 1072 | if (skb) |
| 1073 | skb_tx_timestamp(skb); |
Michael Riesch | f9b491e | 2011-09-29 04:06:26 +0000 | [diff] [blame] | 1074 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | // some devices want funky USB-level framing, for |
| 1076 | // win32 driver (usually) and/or hardware quirks |
| 1077 | if (info->tx_fixup) { |
| 1078 | skb = info->tx_fixup (dev, skb, GFP_ATOMIC); |
| 1079 | if (!skb) { |
Alexey Orishko | 073285f | 2010-11-29 23:23:27 +0000 | [diff] [blame] | 1080 | if (netif_msg_tx_err(dev)) { |
| 1081 | netif_dbg(dev, tx_err, dev->net, "can't tx_fixup skb\n"); |
| 1082 | goto drop; |
| 1083 | } else { |
| 1084 | /* cdc_ncm collected packet; waits for more */ |
| 1085 | goto not_drop; |
| 1086 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | } |
| 1088 | } |
| 1089 | length = skb->len; |
| 1090 | |
| 1091 | if (!(urb = usb_alloc_urb (0, GFP_ATOMIC))) { |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 1092 | netif_dbg(dev, tx_err, dev->net, "no urb\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | goto drop; |
| 1094 | } |
| 1095 | |
| 1096 | entry = (struct skb_data *) skb->cb; |
| 1097 | entry->urb = urb; |
| 1098 | entry->dev = dev; |
| 1099 | entry->state = tx_start; |
| 1100 | entry->length = length; |
| 1101 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | usb_fill_bulk_urb (urb, dev->udev, dev->out, |
| 1103 | skb->data, skb->len, tx_complete, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | |
| 1105 | /* don't assume the hardware handles USB_ZERO_PACKET |
| 1106 | * NOTE: strictly conforming cdc-ether devices should expect |
| 1107 | * the ZLP here, but ignore the one-byte packet. |
Alexey Orishko | 073285f | 2010-11-29 23:23:27 +0000 | [diff] [blame] | 1108 | * NOTE2: CDC NCM specification is different from CDC ECM when |
| 1109 | * handling ZLP/short packets, so cdc_ncm driver will make short |
| 1110 | * packet itself if needed. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | */ |
Elina Pasheva | b4d562e3 | 2010-04-06 14:23:07 +0000 | [diff] [blame] | 1112 | if (length % dev->maxpacket == 0) { |
| 1113 | if (!(info->flags & FLAG_SEND_ZLP)) { |
Alexey Orishko | 073285f | 2010-11-29 23:23:27 +0000 | [diff] [blame] | 1114 | if (!(info->flags & FLAG_MULTI_PACKET)) { |
| 1115 | urb->transfer_buffer_length++; |
| 1116 | if (skb_tailroom(skb)) { |
| 1117 | skb->data[skb->len] = 0; |
| 1118 | __skb_put(skb, 1); |
| 1119 | } |
Elina Pasheva | b4d562e3 | 2010-04-06 14:23:07 +0000 | [diff] [blame] | 1120 | } |
| 1121 | } else |
| 1122 | urb->transfer_flags |= URB_ZERO_PACKET; |
Peter Korsgaard | 3e323f3 | 2007-06-27 08:48:15 +0200 | [diff] [blame] | 1123 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 1125 | spin_lock_irqsave(&dev->txq.lock, flags); |
| 1126 | retval = usb_autopm_get_interface_async(dev->intf); |
| 1127 | if (retval < 0) { |
| 1128 | spin_unlock_irqrestore(&dev->txq.lock, flags); |
| 1129 | goto drop; |
| 1130 | } |
| 1131 | |
| 1132 | #ifdef CONFIG_PM |
| 1133 | /* if this triggers the device is still a sleep */ |
| 1134 | if (test_bit(EVENT_DEV_ASLEEP, &dev->flags)) { |
| 1135 | /* transmission will be done in resume */ |
| 1136 | usb_anchor_urb(urb, &dev->deferred); |
| 1137 | /* no use to process more packets */ |
| 1138 | netif_stop_queue(net); |
| 1139 | spin_unlock_irqrestore(&dev->txq.lock, flags); |
Joe Perches | 60b8675 | 2010-02-17 10:30:23 +0000 | [diff] [blame] | 1140 | netdev_dbg(dev->net, "Delaying transmission for resumption\n"); |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 1141 | goto deferred; |
| 1142 | } |
| 1143 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1145 | switch ((retval = usb_submit_urb (urb, GFP_ATOMIC))) { |
| 1146 | case -EPIPE: |
| 1147 | netif_stop_queue (net); |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 1148 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 1149 | usb_autopm_put_interface_async(dev->intf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | break; |
| 1151 | default: |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 1152 | usb_autopm_put_interface_async(dev->intf); |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 1153 | netif_dbg(dev, tx_err, dev->net, |
| 1154 | "tx: submit urb err %d\n", retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | break; |
| 1156 | case 0: |
| 1157 | net->trans_start = jiffies; |
| 1158 | __skb_queue_tail (&dev->txq, skb); |
| 1159 | if (dev->txq.qlen >= TX_QLEN (dev)) |
| 1160 | netif_stop_queue (net); |
| 1161 | } |
| 1162 | spin_unlock_irqrestore (&dev->txq.lock, flags); |
| 1163 | |
| 1164 | if (retval) { |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 1165 | netif_dbg(dev, tx_err, dev->net, "drop, code %d\n", retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1166 | drop: |
Herbert Xu | 7963837 | 2009-06-29 16:53:28 +0000 | [diff] [blame] | 1167 | dev->net->stats.tx_dropped++; |
Alexey Orishko | 073285f | 2010-11-29 23:23:27 +0000 | [diff] [blame] | 1168 | not_drop: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | if (skb) |
| 1170 | dev_kfree_skb_any (skb); |
| 1171 | usb_free_urb (urb); |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 1172 | } else |
| 1173 | netif_dbg(dev, tx_queued, dev->net, |
| 1174 | "> tx, len %d, type 0x%x\n", length, skb->protocol); |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 1175 | #ifdef CONFIG_PM |
| 1176 | deferred: |
| 1177 | #endif |
Stephen Hemminger | 25a79c4 | 2009-08-31 19:50:45 +0000 | [diff] [blame] | 1178 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | } |
Stephen Hemminger | 777baa4 | 2009-03-20 19:35:54 +0000 | [diff] [blame] | 1180 | EXPORT_SYMBOL_GPL(usbnet_start_xmit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | |
| 1182 | /*-------------------------------------------------------------------------*/ |
| 1183 | |
| 1184 | // tasklet (work deferred from completions, in_irq) or timer |
| 1185 | |
| 1186 | static void usbnet_bh (unsigned long param) |
| 1187 | { |
| 1188 | struct usbnet *dev = (struct usbnet *) param; |
| 1189 | struct sk_buff *skb; |
| 1190 | struct skb_data *entry; |
| 1191 | |
| 1192 | while ((skb = skb_dequeue (&dev->done))) { |
| 1193 | entry = (struct skb_data *) skb->cb; |
| 1194 | switch (entry->state) { |
David Brownell | 18ab458 | 2007-05-25 12:31:32 -0700 | [diff] [blame] | 1195 | case rx_done: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | entry->state = rx_cleanup; |
| 1197 | rx_process (dev, skb); |
| 1198 | continue; |
David Brownell | 18ab458 | 2007-05-25 12:31:32 -0700 | [diff] [blame] | 1199 | case tx_done: |
| 1200 | case rx_cleanup: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | usb_free_urb (entry->urb); |
| 1202 | dev_kfree_skb (skb); |
| 1203 | continue; |
David Brownell | 18ab458 | 2007-05-25 12:31:32 -0700 | [diff] [blame] | 1204 | default: |
Joe Perches | 60b8675 | 2010-02-17 10:30:23 +0000 | [diff] [blame] | 1205 | netdev_dbg(dev->net, "bogus skb state %d\n", entry->state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | } |
| 1207 | } |
| 1208 | |
| 1209 | // waiting for all pending urbs to complete? |
| 1210 | if (dev->wait) { |
| 1211 | if ((dev->txq.qlen + dev->rxq.qlen + dev->done.qlen) == 0) { |
| 1212 | wake_up (dev->wait); |
| 1213 | } |
| 1214 | |
| 1215 | // or are we maybe short a few urbs? |
Joe Perches | 8e95a20 | 2009-12-03 07:58:21 +0000 | [diff] [blame] | 1216 | } else if (netif_running (dev->net) && |
| 1217 | netif_device_present (dev->net) && |
| 1218 | !timer_pending (&dev->delay) && |
| 1219 | !test_bit (EVENT_RX_HALT, &dev->flags)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | int temp = dev->rxq.qlen; |
| 1221 | int qlen = RX_QLEN (dev); |
| 1222 | |
| 1223 | if (temp < qlen) { |
| 1224 | struct urb *urb; |
| 1225 | int i; |
| 1226 | |
| 1227 | // don't refill the queue all at once |
| 1228 | for (i = 0; i < 10 && dev->rxq.qlen < qlen; i++) { |
| 1229 | urb = usb_alloc_urb (0, GFP_ATOMIC); |
David S. Miller | dacb397 | 2010-08-10 02:50:55 -0700 | [diff] [blame] | 1230 | if (urb != NULL) { |
| 1231 | if (rx_submit (dev, urb, GFP_ATOMIC) == |
| 1232 | -ENOLINK) |
| 1233 | return; |
| 1234 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | } |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 1236 | if (temp != dev->rxq.qlen) |
| 1237 | netif_dbg(dev, link, dev->net, |
| 1238 | "rxqlen %d --> %d\n", |
| 1239 | temp, dev->rxq.qlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1240 | if (dev->rxq.qlen < qlen) |
| 1241 | tasklet_schedule (&dev->bh); |
| 1242 | } |
| 1243 | if (dev->txq.qlen < TX_QLEN (dev)) |
| 1244 | netif_wake_queue (dev->net); |
| 1245 | } |
| 1246 | } |
| 1247 | |
| 1248 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | /*------------------------------------------------------------------------- |
| 1250 | * |
| 1251 | * USB Device Driver support |
| 1252 | * |
| 1253 | *-------------------------------------------------------------------------*/ |
David Brownell | cb1cebb | 2007-02-15 18:52:30 -0800 | [diff] [blame] | 1254 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | // precondition: never called in_interrupt |
| 1256 | |
David Brownell | 38bde1d | 2005-08-31 09:52:45 -0700 | [diff] [blame] | 1257 | void usbnet_disconnect (struct usb_interface *intf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | { |
| 1259 | struct usbnet *dev; |
| 1260 | struct usb_device *xdev; |
| 1261 | struct net_device *net; |
| 1262 | |
| 1263 | dev = usb_get_intfdata(intf); |
| 1264 | usb_set_intfdata(intf, NULL); |
| 1265 | if (!dev) |
| 1266 | return; |
| 1267 | |
| 1268 | xdev = interface_to_usbdev (intf); |
| 1269 | |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 1270 | netif_info(dev, probe, dev->net, "unregister '%s' usb-%s-%s, %s\n", |
| 1271 | intf->dev.driver->name, |
| 1272 | xdev->bus->bus_name, xdev->devpath, |
| 1273 | dev->driver_info->description); |
David Brownell | cb1cebb | 2007-02-15 18:52:30 -0800 | [diff] [blame] | 1274 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1275 | net = dev->net; |
| 1276 | unregister_netdev (net); |
| 1277 | |
Tejun Heo | 23f333a | 2010-12-12 16:45:14 +0100 | [diff] [blame] | 1278 | cancel_work_sync(&dev->kevent); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | |
| 1280 | if (dev->driver_info->unbind) |
| 1281 | dev->driver_info->unbind (dev, intf); |
| 1282 | |
Paul Stewart | 68972ef | 2011-04-28 05:43:37 +0000 | [diff] [blame] | 1283 | usb_kill_urb(dev->interrupt); |
| 1284 | usb_free_urb(dev->interrupt); |
| 1285 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | free_netdev(net); |
| 1287 | usb_put_dev (xdev); |
| 1288 | } |
David Brownell | 38bde1d | 2005-08-31 09:52:45 -0700 | [diff] [blame] | 1289 | EXPORT_SYMBOL_GPL(usbnet_disconnect); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | |
Stephen Hemminger | 777baa4 | 2009-03-20 19:35:54 +0000 | [diff] [blame] | 1291 | static const struct net_device_ops usbnet_netdev_ops = { |
| 1292 | .ndo_open = usbnet_open, |
| 1293 | .ndo_stop = usbnet_stop, |
| 1294 | .ndo_start_xmit = usbnet_start_xmit, |
| 1295 | .ndo_tx_timeout = usbnet_tx_timeout, |
| 1296 | .ndo_change_mtu = usbnet_change_mtu, |
| 1297 | .ndo_set_mac_address = eth_mac_addr, |
| 1298 | .ndo_validate_addr = eth_validate_addr, |
| 1299 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | |
| 1301 | /*-------------------------------------------------------------------------*/ |
| 1302 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | // precondition: never called in_interrupt |
| 1304 | |
Marcel Holtmann | 225794f | 2009-10-02 05:15:26 +0000 | [diff] [blame] | 1305 | static struct device_type wlan_type = { |
| 1306 | .name = "wlan", |
| 1307 | }; |
| 1308 | |
| 1309 | static struct device_type wwan_type = { |
| 1310 | .name = "wwan", |
| 1311 | }; |
| 1312 | |
David Brownell | 38bde1d | 2005-08-31 09:52:45 -0700 | [diff] [blame] | 1313 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod) |
| 1315 | { |
| 1316 | struct usbnet *dev; |
David Brownell | cb1cebb | 2007-02-15 18:52:30 -0800 | [diff] [blame] | 1317 | struct net_device *net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1318 | struct usb_host_interface *interface; |
| 1319 | struct driver_info *info; |
| 1320 | struct usb_device *xdev; |
| 1321 | int status; |
David Brownell | 296c024 | 2007-04-17 16:10:10 -0700 | [diff] [blame] | 1322 | const char *name; |
Ming Lei | b0786b4 | 2010-11-01 07:11:54 -0700 | [diff] [blame] | 1323 | struct usb_driver *driver = to_usb_driver(udev->dev.driver); |
| 1324 | |
| 1325 | /* usbnet already took usb runtime pm, so have to enable the feature |
| 1326 | * for usb interface, otherwise usb_autopm_get_interface may return |
| 1327 | * failure if USB_SUSPEND(RUNTIME_PM) is enabled. |
| 1328 | */ |
| 1329 | if (!driver->supports_autosuspend) { |
| 1330 | driver->supports_autosuspend = 1; |
| 1331 | pm_runtime_enable(&udev->dev); |
| 1332 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1333 | |
David Brownell | 296c024 | 2007-04-17 16:10:10 -0700 | [diff] [blame] | 1334 | name = udev->dev.driver->name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1335 | info = (struct driver_info *) prod->driver_info; |
| 1336 | if (!info) { |
David Brownell | 296c024 | 2007-04-17 16:10:10 -0700 | [diff] [blame] | 1337 | dev_dbg (&udev->dev, "blacklisted by %s\n", name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | return -ENODEV; |
| 1339 | } |
| 1340 | xdev = interface_to_usbdev (udev); |
| 1341 | interface = udev->cur_altsetting; |
| 1342 | |
| 1343 | usb_get_dev (xdev); |
| 1344 | |
| 1345 | status = -ENOMEM; |
| 1346 | |
| 1347 | // set up our own records |
| 1348 | net = alloc_etherdev(sizeof(*dev)); |
Joe Perches | 41de8d4 | 2012-01-29 13:47:52 +0000 | [diff] [blame] | 1349 | if (!net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1350 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | |
Ben Hutchings | 0dacca7 | 2010-07-02 21:49:02 -0700 | [diff] [blame] | 1352 | /* netdev_printk() needs this so do it as early as possible */ |
| 1353 | SET_NETDEV_DEV(net, &udev->dev); |
| 1354 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | dev = netdev_priv(net); |
| 1356 | dev->udev = xdev; |
Oliver Neukum | a11a654 | 2007-08-03 13:52:19 +0200 | [diff] [blame] | 1357 | dev->intf = udev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | dev->driver_info = info; |
David Brownell | 296c024 | 2007-04-17 16:10:10 -0700 | [diff] [blame] | 1359 | dev->driver_name = name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | dev->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV |
| 1361 | | NETIF_MSG_PROBE | NETIF_MSG_LINK); |
| 1362 | skb_queue_head_init (&dev->rxq); |
| 1363 | skb_queue_head_init (&dev->txq); |
| 1364 | skb_queue_head_init (&dev->done); |
Jussi Kivilinna | 7834ddb | 2009-08-11 22:57:16 +0300 | [diff] [blame] | 1365 | skb_queue_head_init(&dev->rxq_pause); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1366 | dev->bh.func = usbnet_bh; |
| 1367 | dev->bh.data = (unsigned long) dev; |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1368 | INIT_WORK (&dev->kevent, kevent); |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 1369 | init_usb_anchor(&dev->deferred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | dev->delay.function = usbnet_bh; |
| 1371 | dev->delay.data = (unsigned long) dev; |
| 1372 | init_timer (&dev->delay); |
Arnd Bergmann | a9fc633 | 2006-10-09 00:08:02 +0200 | [diff] [blame] | 1373 | mutex_init (&dev->phy_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | dev->net = net; |
| 1376 | strcpy (net->name, "usb%d"); |
| 1377 | memcpy (net->dev_addr, node_id, sizeof node_id); |
| 1378 | |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 1379 | /* rx and tx sides can use different message sizes; |
| 1380 | * bind() should set rx_urb_size in that case. |
| 1381 | */ |
| 1382 | dev->hard_mtu = net->mtu + net->hard_header_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1383 | #if 0 |
| 1384 | // dma_supported() is deeply broken on almost all architectures |
| 1385 | // possible with some EHCI controllers |
Yang Hongyang | 6a35528 | 2009-04-06 19:01:13 -0700 | [diff] [blame] | 1386 | if (dma_supported (&udev->dev, DMA_BIT_MASK(64))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1387 | net->features |= NETIF_F_HIGHDMA; |
| 1388 | #endif |
| 1389 | |
Stephen Hemminger | 777baa4 | 2009-03-20 19:35:54 +0000 | [diff] [blame] | 1390 | net->netdev_ops = &usbnet_netdev_ops; |
Stephen Hemminger | 777baa4 | 2009-03-20 19:35:54 +0000 | [diff] [blame] | 1391 | net->watchdog_timeo = TX_TIMEOUT_JIFFIES; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | net->ethtool_ops = &usbnet_ethtool_ops; |
| 1393 | |
| 1394 | // allow device-specific bind/init procedures |
| 1395 | // NOTE net->name still not usable ... |
| 1396 | if (info->bind) { |
| 1397 | status = info->bind (dev, udev); |
David Brownell | cb1cebb | 2007-02-15 18:52:30 -0800 | [diff] [blame] | 1398 | if (status < 0) |
| 1399 | goto out1; |
| 1400 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1401 | // heuristic: "usb%d" for links we know are two-host, |
| 1402 | // else "eth%d" when there's reasonable doubt. userspace |
| 1403 | // can rename the link if it knows better. |
Joe Perches | 8e95a20 | 2009-12-03 07:58:21 +0000 | [diff] [blame] | 1404 | if ((dev->driver_info->flags & FLAG_ETHER) != 0 && |
Arnd Bergmann | c261344 | 2011-04-01 20:12:02 -0700 | [diff] [blame] | 1405 | ((dev->driver_info->flags & FLAG_POINTTOPOINT) == 0 || |
| 1406 | (net->dev_addr [0] & 0x02) == 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | strcpy (net->name, "eth%d"); |
Jussi Kivilinna | 6e3bbcc | 2008-01-26 00:51:06 +0200 | [diff] [blame] | 1408 | /* WLAN devices should always be named "wlan%d" */ |
| 1409 | if ((dev->driver_info->flags & FLAG_WLAN) != 0) |
| 1410 | strcpy(net->name, "wlan%d"); |
Marcel Holtmann | e1e499e | 2009-10-02 05:15:25 +0000 | [diff] [blame] | 1411 | /* WWAN devices should always be named "wwan%d" */ |
| 1412 | if ((dev->driver_info->flags & FLAG_WWAN) != 0) |
| 1413 | strcpy(net->name, "wwan%d"); |
David Brownell | f29fc25 | 2005-08-31 09:52:31 -0700 | [diff] [blame] | 1414 | |
| 1415 | /* maybe the remote can't receive an Ethernet MTU */ |
| 1416 | if (net->mtu > (dev->hard_mtu - net->hard_header_len)) |
| 1417 | net->mtu = dev->hard_mtu - net->hard_header_len; |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 1418 | } else if (!info->in || !info->out) |
| 1419 | status = usbnet_get_endpoints (dev, udev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1420 | else { |
| 1421 | dev->in = usb_rcvbulkpipe (xdev, info->in); |
| 1422 | dev->out = usb_sndbulkpipe (xdev, info->out); |
| 1423 | if (!(info->flags & FLAG_NO_SETINT)) |
| 1424 | status = usb_set_interface (xdev, |
| 1425 | interface->desc.bInterfaceNumber, |
| 1426 | interface->desc.bAlternateSetting); |
| 1427 | else |
| 1428 | status = 0; |
| 1429 | |
| 1430 | } |
Peter Korsgaard | 9514bfe | 2007-07-03 00:46:42 +0200 | [diff] [blame] | 1431 | if (status >= 0 && dev->status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | status = init_status (dev, udev); |
| 1433 | if (status < 0) |
David Brownell | cb1cebb | 2007-02-15 18:52:30 -0800 | [diff] [blame] | 1434 | goto out3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | |
David Brownell | 2e55cc7 | 2005-08-31 09:53:10 -0700 | [diff] [blame] | 1436 | if (!dev->rx_urb_size) |
| 1437 | dev->rx_urb_size = dev->hard_mtu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | dev->maxpacket = usb_maxpacket (dev->udev, dev->out, 1); |
David Brownell | cb1cebb | 2007-02-15 18:52:30 -0800 | [diff] [blame] | 1439 | |
Marcel Holtmann | 225794f | 2009-10-02 05:15:26 +0000 | [diff] [blame] | 1440 | if ((dev->driver_info->flags & FLAG_WLAN) != 0) |
| 1441 | SET_NETDEV_DEVTYPE(net, &wlan_type); |
| 1442 | if ((dev->driver_info->flags & FLAG_WWAN) != 0) |
| 1443 | SET_NETDEV_DEVTYPE(net, &wwan_type); |
| 1444 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1445 | status = register_netdev (net); |
| 1446 | if (status) |
tom.leiming@gmail.com | a472384 | 2012-04-29 22:51:03 +0000 | [diff] [blame] | 1447 | goto out4; |
Joe Perches | a475f60 | 2010-02-17 10:30:24 +0000 | [diff] [blame] | 1448 | netif_info(dev, probe, dev->net, |
| 1449 | "register '%s' at usb-%s-%s, %s, %pM\n", |
| 1450 | udev->dev.driver->name, |
| 1451 | xdev->bus->bus_name, xdev->devpath, |
| 1452 | dev->driver_info->description, |
| 1453 | net->dev_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | |
| 1455 | // ok, it's ready to go. |
| 1456 | usb_set_intfdata (udev, dev); |
| 1457 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1458 | netif_device_attach (net); |
| 1459 | |
Ben Hutchings | 37e8273 | 2009-11-04 15:29:52 +0000 | [diff] [blame] | 1460 | if (dev->driver_info->flags & FLAG_LINK_INTR) |
| 1461 | netif_carrier_off(net); |
| 1462 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | return 0; |
| 1464 | |
tom.leiming@gmail.com | a472384 | 2012-04-29 22:51:03 +0000 | [diff] [blame] | 1465 | out4: |
| 1466 | usb_free_urb(dev->interrupt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1467 | out3: |
| 1468 | if (info->unbind) |
| 1469 | info->unbind (dev, udev); |
| 1470 | out1: |
| 1471 | free_netdev(net); |
| 1472 | out: |
| 1473 | usb_put_dev(xdev); |
| 1474 | return status; |
| 1475 | } |
David Brownell | 38bde1d | 2005-08-31 09:52:45 -0700 | [diff] [blame] | 1476 | EXPORT_SYMBOL_GPL(usbnet_probe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | |
| 1478 | /*-------------------------------------------------------------------------*/ |
| 1479 | |
Oliver Neukum | 3643312 | 2007-04-30 01:37:44 -0700 | [diff] [blame] | 1480 | /* |
| 1481 | * suspend the whole driver as soon as the first interface is suspended |
| 1482 | * resume only when the last interface is resumed |
David Brownell | 38bde1d | 2005-08-31 09:52:45 -0700 | [diff] [blame] | 1483 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1484 | |
David Brownell | 38bde1d | 2005-08-31 09:52:45 -0700 | [diff] [blame] | 1485 | int usbnet_suspend (struct usb_interface *intf, pm_message_t message) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | { |
| 1487 | struct usbnet *dev = usb_get_intfdata(intf); |
David Brownell | cb1cebb | 2007-02-15 18:52:30 -0800 | [diff] [blame] | 1488 | |
Oliver Neukum | 3643312 | 2007-04-30 01:37:44 -0700 | [diff] [blame] | 1489 | if (!dev->suspend_count++) { |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 1490 | spin_lock_irq(&dev->txq.lock); |
| 1491 | /* don't autosuspend while transmitting */ |
Alan Stern | 5b1b0b8 | 2011-08-19 23:49:48 +0200 | [diff] [blame] | 1492 | if (dev->txq.qlen && PMSG_IS_AUTO(message)) { |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 1493 | spin_unlock_irq(&dev->txq.lock); |
| 1494 | return -EBUSY; |
| 1495 | } else { |
| 1496 | set_bit(EVENT_DEV_ASLEEP, &dev->flags); |
| 1497 | spin_unlock_irq(&dev->txq.lock); |
| 1498 | } |
Oliver Neukum | a11a654 | 2007-08-03 13:52:19 +0200 | [diff] [blame] | 1499 | /* |
| 1500 | * accelerate emptying of the rx and queues, to avoid |
Oliver Neukum | 3643312 | 2007-04-30 01:37:44 -0700 | [diff] [blame] | 1501 | * having everything error out. |
| 1502 | */ |
| 1503 | netif_device_detach (dev->net); |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 1504 | usbnet_terminate_urbs(dev); |
| 1505 | usb_kill_urb(dev->interrupt); |
| 1506 | |
Oliver Neukum | a11a654 | 2007-08-03 13:52:19 +0200 | [diff] [blame] | 1507 | /* |
| 1508 | * reattach so runtime management can use and |
| 1509 | * wake the device |
| 1510 | */ |
| 1511 | netif_device_attach (dev->net); |
Oliver Neukum | 3643312 | 2007-04-30 01:37:44 -0700 | [diff] [blame] | 1512 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1513 | return 0; |
| 1514 | } |
David Brownell | 38bde1d | 2005-08-31 09:52:45 -0700 | [diff] [blame] | 1515 | EXPORT_SYMBOL_GPL(usbnet_suspend); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | |
David Brownell | 38bde1d | 2005-08-31 09:52:45 -0700 | [diff] [blame] | 1517 | int usbnet_resume (struct usb_interface *intf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | { |
| 1519 | struct usbnet *dev = usb_get_intfdata(intf); |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 1520 | struct sk_buff *skb; |
| 1521 | struct urb *res; |
| 1522 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1523 | |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 1524 | if (!--dev->suspend_count) { |
Paul Stewart | 68972ef | 2011-04-28 05:43:37 +0000 | [diff] [blame] | 1525 | /* resume interrupt URBs */ |
| 1526 | if (dev->interrupt && test_bit(EVENT_DEV_OPEN, &dev->flags)) |
| 1527 | usb_submit_urb(dev->interrupt, GFP_NOIO); |
| 1528 | |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 1529 | spin_lock_irq(&dev->txq.lock); |
| 1530 | while ((res = usb_get_from_anchor(&dev->deferred))) { |
| 1531 | |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 1532 | skb = (struct sk_buff *)res->context; |
| 1533 | retval = usb_submit_urb(res, GFP_ATOMIC); |
| 1534 | if (retval < 0) { |
| 1535 | dev_kfree_skb_any(skb); |
| 1536 | usb_free_urb(res); |
| 1537 | usb_autopm_put_interface_async(dev->intf); |
| 1538 | } else { |
| 1539 | dev->net->trans_start = jiffies; |
| 1540 | __skb_queue_tail(&dev->txq, skb); |
| 1541 | } |
| 1542 | } |
| 1543 | |
| 1544 | smp_mb(); |
| 1545 | clear_bit(EVENT_DEV_ASLEEP, &dev->flags); |
| 1546 | spin_unlock_irq(&dev->txq.lock); |
Ming Lei | 75bd0cb | 2011-04-28 22:37:09 +0000 | [diff] [blame] | 1547 | |
| 1548 | if (test_bit(EVENT_DEV_OPEN, &dev->flags)) { |
| 1549 | if (!(dev->txq.qlen >= TX_QLEN(dev))) |
Alexey Orishko | 1aa9bc5 | 2012-03-14 04:00:24 +0000 | [diff] [blame] | 1550 | netif_tx_wake_all_queues(dev->net); |
Ming Lei | 75bd0cb | 2011-04-28 22:37:09 +0000 | [diff] [blame] | 1551 | tasklet_schedule (&dev->bh); |
| 1552 | } |
Oliver Neukum | 69ee472f | 2009-12-03 15:31:18 -0800 | [diff] [blame] | 1553 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1554 | return 0; |
| 1555 | } |
David Brownell | 38bde1d | 2005-08-31 09:52:45 -0700 | [diff] [blame] | 1556 | EXPORT_SYMBOL_GPL(usbnet_resume); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1557 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1558 | |
| 1559 | /*-------------------------------------------------------------------------*/ |
| 1560 | |
David Brownell | f29fc25 | 2005-08-31 09:52:31 -0700 | [diff] [blame] | 1561 | static int __init usbnet_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | { |
Thiago Farina | c582a95 | 2011-04-17 17:49:21 -0700 | [diff] [blame] | 1563 | /* Compiler should optimize this out. */ |
| 1564 | BUILD_BUG_ON( |
| 1565 | FIELD_SIZEOF(struct sk_buff, cb) < sizeof(struct skb_data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1566 | |
| 1567 | random_ether_addr(node_id); |
David Brownell | cb1cebb | 2007-02-15 18:52:30 -0800 | [diff] [blame] | 1568 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1569 | } |
David Brownell | f29fc25 | 2005-08-31 09:52:31 -0700 | [diff] [blame] | 1570 | module_init(usbnet_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1571 | |
David Brownell | f29fc25 | 2005-08-31 09:52:31 -0700 | [diff] [blame] | 1572 | static void __exit usbnet_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1573 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1574 | } |
David Brownell | f29fc25 | 2005-08-31 09:52:31 -0700 | [diff] [blame] | 1575 | module_exit(usbnet_exit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1576 | |
David Brownell | f29fc25 | 2005-08-31 09:52:31 -0700 | [diff] [blame] | 1577 | MODULE_AUTHOR("David Brownell"); |
David Brownell | 090ffa9 | 2005-08-31 09:54:50 -0700 | [diff] [blame] | 1578 | MODULE_DESCRIPTION("USB network driver framework"); |
David Brownell | f29fc25 | 2005-08-31 09:52:31 -0700 | [diff] [blame] | 1579 | MODULE_LICENSE("GPL"); |