^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * USB Network driver infrastructure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2000-2005 by David Brownell
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * This is a generic "USB networking" framework that works with several
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * kinds of full and high speed networking devices: host-to-host cables,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * smart usb peripherals, and actual Ethernet adapters.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * These devices usually differ in terms of control protocols (if they
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * even have one!) and sometimes they define new framing to wrap or batch
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * Ethernet packets. Otherwise, they talk to USB pretty much the same,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * so interface (un)binding, endpoint I/O queues, fault handling, and other
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * issues can usefully be addressed by this framework.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) // #define DEBUG // error path messages, extra info
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) // #define VERBOSE // more; success messages
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/etherdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/ctype.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/ethtool.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/mii.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/usb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/usb/usbnet.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <linux/pm_runtime.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * Nineteen USB 1.1 max size bulk transactions per frame (ms), max.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * Several dozen bytes of IPv4 data can fit in two such transactions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * One maximum size Ethernet packet takes twenty four of them.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * For high speed, each frame comfortably fits almost 36 max size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * Ethernet packets (so queues should be bigger).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * The goal is to let the USB host controller be busy for 5msec or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * more before an irq is required, under load. Jumbograms change
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * the equation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define MAX_QUEUE_MEMORY (60 * 1518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define RX_QLEN(dev) ((dev)->rx_qlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define TX_QLEN(dev) ((dev)->tx_qlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) // reawaken network queue this soon after stopping; else watchdog barks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define TX_TIMEOUT_JIFFIES (5*HZ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) /* throttle rx/tx briefly after some faults, so hub_wq might disconnect()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * us (it polls at HZ/4 usually) before we report too many false errors.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #define THROTTLE_JIFFIES (HZ/8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) // between wakeups
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #define UNLINK_TIMEOUT_MS 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) // randomly generated ethernet address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) static u8 node_id [ETH_ALEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) /* use ethtool to change the level for any given device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static int msg_level = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) module_param (msg_level, int, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) MODULE_PARM_DESC (msg_level, "Override default message level");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) /* handles CDC Ethernet and many other network "bulk data" interfaces */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) int usbnet_get_endpoints(struct usbnet *dev, struct usb_interface *intf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) int tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) struct usb_host_interface *alt = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) struct usb_host_endpoint *in = NULL, *out = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) struct usb_host_endpoint *status = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) for (tmp = 0; tmp < intf->num_altsetting; tmp++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) unsigned ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) in = out = status = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) alt = intf->altsetting + tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) /* take the first altsetting with in-bulk + out-bulk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) * remember any status endpoint, just in case;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * ignore other endpoints and altsettings.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) struct usb_host_endpoint *e;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) int intr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) e = alt->endpoint + ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) /* ignore endpoints which cannot transfer data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (!usb_endpoint_maxp(&e->desc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) switch (e->desc.bmAttributes) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) case USB_ENDPOINT_XFER_INT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (!usb_endpoint_dir_in(&e->desc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) intr = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) case USB_ENDPOINT_XFER_BULK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if (usb_endpoint_dir_in(&e->desc)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if (!intr && !in)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) in = e;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) else if (intr && !status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) status = e;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (!out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) out = e;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) if (in && out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (!alt || !in || !out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) if (alt->desc.bAlternateSetting != 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) !(dev->driver_info->flags & FLAG_NO_SETINT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) tmp = usb_set_interface (dev->udev, alt->desc.bInterfaceNumber,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) alt->desc.bAlternateSetting);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (tmp < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) return tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) dev->in = usb_rcvbulkpipe (dev->udev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) dev->out = usb_sndbulkpipe (dev->udev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) dev->status = status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) EXPORT_SYMBOL_GPL(usbnet_get_endpoints);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) int usbnet_get_ethernet_addr(struct usbnet *dev, int iMACAddress)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) int tmp = -1, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) unsigned char buf [13];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) ret = usb_string(dev->udev, iMACAddress, buf, sizeof buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) if (ret == 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) tmp = hex2bin(dev->net->dev_addr, buf, 6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) if (tmp < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) dev_dbg(&dev->udev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) "bad MAC string %d fetch, %d\n", iMACAddress, tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) if (ret >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) EXPORT_SYMBOL_GPL(usbnet_get_ethernet_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) static void intr_complete (struct urb *urb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) struct usbnet *dev = urb->context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) int status = urb->status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) switch (status) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) /* success */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) dev->driver_info->status(dev, urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) /* software-driven interface shutdown */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) case -ENOENT: /* urb killed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) case -ESHUTDOWN: /* hardware gone */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) netif_dbg(dev, ifdown, dev->net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) "intr shutdown, code %d\n", status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) /* NOTE: not throttling like RX/TX, since this endpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) * already polls infrequently
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) netdev_dbg(dev->net, "intr status %d\n", status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) status = usb_submit_urb (urb, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) if (status != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) netif_err(dev, timer, dev->net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) "intr resubmit --> %d\n", status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) static int init_status (struct usbnet *dev, struct usb_interface *intf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) char *buf = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) unsigned pipe = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) unsigned maxp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) unsigned period;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) if (!dev->driver_info->status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) pipe = usb_rcvintpipe (dev->udev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) dev->status->desc.bEndpointAddress
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) & USB_ENDPOINT_NUMBER_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) maxp = usb_maxpacket (dev->udev, pipe, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) /* avoid 1 msec chatter: min 8 msec poll rate */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) period = max ((int) dev->status->desc.bInterval,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) (dev->udev->speed == USB_SPEED_HIGH) ? 7 : 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) buf = kmalloc (maxp, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) if (buf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) dev->interrupt = usb_alloc_urb (0, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) if (!dev->interrupt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) kfree (buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) usb_fill_int_urb(dev->interrupt, dev->udev, pipe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) buf, maxp, intr_complete, dev, period);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) dev->interrupt->transfer_flags |= URB_FREE_BUFFER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) dev_dbg(&intf->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) "status ep%din, %d bytes period %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) usb_pipeendpoint(pipe), maxp, period);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) /* Submit the interrupt URB if not previously submitted, increasing refcount */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) int usbnet_status_start(struct usbnet *dev, gfp_t mem_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) WARN_ON_ONCE(dev->interrupt == NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) if (dev->interrupt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) mutex_lock(&dev->interrupt_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) if (++dev->interrupt_count == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) ret = usb_submit_urb(dev->interrupt, mem_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) dev_dbg(&dev->udev->dev, "incremented interrupt URB count to %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) dev->interrupt_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) mutex_unlock(&dev->interrupt_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) EXPORT_SYMBOL_GPL(usbnet_status_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) /* For resume; submit interrupt URB if previously submitted */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) static int __usbnet_status_start_force(struct usbnet *dev, gfp_t mem_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) mutex_lock(&dev->interrupt_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) if (dev->interrupt_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) ret = usb_submit_urb(dev->interrupt, mem_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) dev_dbg(&dev->udev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) "submitted interrupt URB for resume\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) mutex_unlock(&dev->interrupt_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) /* Kill the interrupt URB if all submitters want it killed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) void usbnet_status_stop(struct usbnet *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) if (dev->interrupt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) mutex_lock(&dev->interrupt_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) WARN_ON(dev->interrupt_count == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) if (dev->interrupt_count && --dev->interrupt_count == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) usb_kill_urb(dev->interrupt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) dev_dbg(&dev->udev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) "decremented interrupt URB count to %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) dev->interrupt_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) mutex_unlock(&dev->interrupt_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) EXPORT_SYMBOL_GPL(usbnet_status_stop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) /* For suspend; always kill interrupt URB */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) static void __usbnet_status_stop_force(struct usbnet *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) if (dev->interrupt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) mutex_lock(&dev->interrupt_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) usb_kill_urb(dev->interrupt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) dev_dbg(&dev->udev->dev, "killed interrupt URB for suspend\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) mutex_unlock(&dev->interrupt_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) /* Passes this packet up the stack, updating its accounting.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) * Some link protocols batch packets, so their rx_fixup paths
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) * can return clones as well as just modify the original skb.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) void usbnet_skb_return (struct usbnet *dev, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) struct pcpu_sw_netstats *stats64 = this_cpu_ptr(dev->stats64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) if (test_bit(EVENT_RX_PAUSED, &dev->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) skb_queue_tail(&dev->rxq_pause, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) /* only update if unset to allow minidriver rx_fixup override */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) if (skb->protocol == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) skb->protocol = eth_type_trans (skb, dev->net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) flags = u64_stats_update_begin_irqsave(&stats64->syncp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) stats64->rx_packets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) stats64->rx_bytes += skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) u64_stats_update_end_irqrestore(&stats64->syncp, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) netif_dbg(dev, rx_status, dev->net, "< rx, len %zu, type 0x%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) skb->len + sizeof (struct ethhdr), skb->protocol);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) memset (skb->cb, 0, sizeof (struct skb_data));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) if (skb_defer_rx_timestamp(skb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) status = netif_rx (skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) if (status != NET_RX_SUCCESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) netif_dbg(dev, rx_err, dev->net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) "netif_rx status %d\n", status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) EXPORT_SYMBOL_GPL(usbnet_skb_return);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) /* must be called if hard_mtu or rx_urb_size changed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) void usbnet_update_max_qlen(struct usbnet *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) enum usb_device_speed speed = dev->udev->speed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) if (!dev->rx_urb_size || !dev->hard_mtu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) goto insanity;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) switch (speed) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) case USB_SPEED_HIGH:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) dev->rx_qlen = MAX_QUEUE_MEMORY / dev->rx_urb_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) dev->tx_qlen = MAX_QUEUE_MEMORY / dev->hard_mtu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) case USB_SPEED_SUPER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) case USB_SPEED_SUPER_PLUS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) * Not take default 5ms qlen for super speed HC to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) * save memory, and iperf tests show 2.5ms qlen can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) * work well
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) dev->rx_qlen = 5 * MAX_QUEUE_MEMORY / dev->rx_urb_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) dev->tx_qlen = 5 * MAX_QUEUE_MEMORY / dev->hard_mtu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) insanity:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) dev->rx_qlen = dev->tx_qlen = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) EXPORT_SYMBOL_GPL(usbnet_update_max_qlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) /*-------------------------------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) * Network Device Driver (peer link to "Host Device", from USB host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) *-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) int usbnet_change_mtu (struct net_device *net, int new_mtu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) struct usbnet *dev = netdev_priv(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) int ll_mtu = new_mtu + net->hard_header_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) int old_hard_mtu = dev->hard_mtu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) int old_rx_urb_size = dev->rx_urb_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) // no second zero-length packet read wanted after mtu-sized packets
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) if ((ll_mtu % dev->maxpacket) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) return -EDOM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) net->mtu = new_mtu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) dev->hard_mtu = net->mtu + net->hard_header_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) if (dev->rx_urb_size == old_hard_mtu) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) dev->rx_urb_size = dev->hard_mtu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) if (dev->rx_urb_size > old_rx_urb_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) usbnet_pause_rx(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) usbnet_unlink_rx_urbs(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) usbnet_resume_rx(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) /* max qlen depend on hard_mtu and rx_urb_size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) usbnet_update_max_qlen(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) EXPORT_SYMBOL_GPL(usbnet_change_mtu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) /* The caller must hold list->lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) static void __usbnet_queue_skb(struct sk_buff_head *list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) struct sk_buff *newsk, enum skb_state state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) struct skb_data *entry = (struct skb_data *) newsk->cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) __skb_queue_tail(list, newsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) entry->state = state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) /* some LK 2.4 HCDs oopsed if we freed or resubmitted urbs from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) * completion callbacks. 2.5 should have fixed those bugs...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) static enum skb_state defer_bh(struct usbnet *dev, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) struct sk_buff_head *list, enum skb_state state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) enum skb_state old_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) struct skb_data *entry = (struct skb_data *) skb->cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) spin_lock_irqsave(&list->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) old_state = entry->state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) entry->state = state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) __skb_unlink(skb, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) /* defer_bh() is never called with list == &dev->done.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) * spin_lock_nested() tells lockdep that it is OK to take
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) * dev->done.lock here with list->lock held.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) spin_lock_nested(&dev->done.lock, SINGLE_DEPTH_NESTING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) __skb_queue_tail(&dev->done, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) if (dev->done.qlen == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) tasklet_schedule(&dev->bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) spin_unlock(&dev->done.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) spin_unlock_irqrestore(&list->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) return old_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) /* some work can't be done in tasklets, so we use keventd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) * NOTE: annoying asymmetry: if it's active, schedule_work() fails,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) * but tasklet_schedule() doesn't. hope the failure is rare.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) void usbnet_defer_kevent (struct usbnet *dev, int work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) set_bit (work, &dev->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) if (!schedule_work (&dev->kevent))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) netdev_dbg(dev->net, "kevent %d may have been dropped\n", work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) netdev_dbg(dev->net, "kevent %d scheduled\n", work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) EXPORT_SYMBOL_GPL(usbnet_defer_kevent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) static void rx_complete (struct urb *urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) static int rx_submit (struct usbnet *dev, struct urb *urb, gfp_t flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) struct skb_data *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) int retval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) unsigned long lockflags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) size_t size = dev->rx_urb_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) /* prevent rx skb allocation when error ratio is high */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) if (test_bit(EVENT_RX_KILL, &dev->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) usb_free_urb(urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) return -ENOLINK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) if (test_bit(EVENT_NO_IP_ALIGN, &dev->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) skb = __netdev_alloc_skb(dev->net, size, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) skb = __netdev_alloc_skb_ip_align(dev->net, size, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) if (!skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) netif_dbg(dev, rx_err, dev->net, "no rx skb\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) usbnet_defer_kevent (dev, EVENT_RX_MEMORY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) usb_free_urb (urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) entry = (struct skb_data *) skb->cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) entry->urb = urb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) entry->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) entry->length = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) usb_fill_bulk_urb (urb, dev->udev, dev->in,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) skb->data, size, rx_complete, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) spin_lock_irqsave (&dev->rxq.lock, lockflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) if (netif_running (dev->net) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) netif_device_present (dev->net) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) test_bit(EVENT_DEV_OPEN, &dev->flags) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) !test_bit (EVENT_RX_HALT, &dev->flags) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) !test_bit (EVENT_DEV_ASLEEP, &dev->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) switch (retval = usb_submit_urb (urb, GFP_ATOMIC)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) case -EPIPE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) usbnet_defer_kevent (dev, EVENT_RX_HALT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) case -ENOMEM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) usbnet_defer_kevent (dev, EVENT_RX_MEMORY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) case -ENODEV:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) netif_dbg(dev, ifdown, dev->net, "device gone\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) netif_device_detach (dev->net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) case -EHOSTUNREACH:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) retval = -ENOLINK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) netif_dbg(dev, rx_err, dev->net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) "rx submit, %d\n", retval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) tasklet_schedule (&dev->bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) __usbnet_queue_skb(&dev->rxq, skb, rx_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) netif_dbg(dev, ifdown, dev->net, "rx: stopped\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) retval = -ENOLINK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) spin_unlock_irqrestore (&dev->rxq.lock, lockflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) if (retval) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) dev_kfree_skb_any (skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) usb_free_urb (urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) static inline void rx_process (struct usbnet *dev, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) if (dev->driver_info->rx_fixup &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) !dev->driver_info->rx_fixup (dev, skb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) /* With RX_ASSEMBLE, rx_fixup() must update counters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) if (!(dev->driver_info->flags & FLAG_RX_ASSEMBLE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) dev->net->stats.rx_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) // else network stack removes extra byte if we forced a short packet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) /* all data was already cloned from skb inside the driver */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) if (dev->driver_info->flags & FLAG_MULTI_PACKET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) if (skb->len < ETH_HLEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) dev->net->stats.rx_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) dev->net->stats.rx_length_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) netif_dbg(dev, rx_err, dev->net, "rx length %d\n", skb->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) usbnet_skb_return(dev, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) skb_queue_tail(&dev->done, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) static void rx_complete (struct urb *urb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) struct sk_buff *skb = (struct sk_buff *) urb->context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) struct skb_data *entry = (struct skb_data *) skb->cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) struct usbnet *dev = entry->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) int urb_status = urb->status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) enum skb_state state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) skb_put (skb, urb->actual_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) state = rx_done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) entry->urb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) switch (urb_status) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) /* success */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) /* stalls need manual reset. this is rare ... except that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) * when going through USB 2.0 TTs, unplug appears this way.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) * we avoid the highspeed version of the ETIMEDOUT/EILSEQ
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) * storm, recovering as needed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) case -EPIPE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) dev->net->stats.rx_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) usbnet_defer_kevent (dev, EVENT_RX_HALT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) /* software-driven interface shutdown */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) case -ECONNRESET: /* async unlink */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) case -ESHUTDOWN: /* hardware gone */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) netif_dbg(dev, ifdown, dev->net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) "rx shutdown, code %d\n", urb_status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) goto block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) /* we get controller i/o faults during hub_wq disconnect() delays.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) * throttle down resubmits, to avoid log floods; just temporarily,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) * so we still recover when the fault isn't a hub_wq delay.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) case -EPROTO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) case -ETIME:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) case -EILSEQ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) dev->net->stats.rx_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) if (!timer_pending (&dev->delay)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) mod_timer (&dev->delay, jiffies + THROTTLE_JIFFIES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) netif_dbg(dev, link, dev->net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) "rx throttle %d\n", urb_status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) block:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) state = rx_cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) entry->urb = urb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) urb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) /* data overrun ... flush fifo? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) case -EOVERFLOW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) dev->net->stats.rx_over_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) state = rx_cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) dev->net->stats.rx_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) netif_dbg(dev, rx_err, dev->net, "rx status %d\n", urb_status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) /* stop rx if packet error rate is high */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) if (++dev->pkt_cnt > 30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) dev->pkt_cnt = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) dev->pkt_err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) if (state == rx_cleanup)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) dev->pkt_err++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) if (dev->pkt_err > 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) set_bit(EVENT_RX_KILL, &dev->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) state = defer_bh(dev, skb, &dev->rxq, state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) if (urb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) if (netif_running (dev->net) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) !test_bit (EVENT_RX_HALT, &dev->flags) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) state != unlink_start) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) rx_submit (dev, urb, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) usb_mark_last_busy(dev->udev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) usb_free_urb (urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) netif_dbg(dev, rx_err, dev->net, "no read resubmitted\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) void usbnet_pause_rx(struct usbnet *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) set_bit(EVENT_RX_PAUSED, &dev->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) netif_dbg(dev, rx_status, dev->net, "paused rx queue enabled\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) EXPORT_SYMBOL_GPL(usbnet_pause_rx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) void usbnet_resume_rx(struct usbnet *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) int num = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) clear_bit(EVENT_RX_PAUSED, &dev->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) while ((skb = skb_dequeue(&dev->rxq_pause)) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) usbnet_skb_return(dev, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) num++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) tasklet_schedule(&dev->bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) netif_dbg(dev, rx_status, dev->net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) "paused rx queue disabled, %d skbs requeued\n", num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) EXPORT_SYMBOL_GPL(usbnet_resume_rx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) void usbnet_purge_paused_rxq(struct usbnet *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) skb_queue_purge(&dev->rxq_pause);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) EXPORT_SYMBOL_GPL(usbnet_purge_paused_rxq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) // unlink pending rx/tx; completion handlers do all other cleanup
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) static int unlink_urbs (struct usbnet *dev, struct sk_buff_head *q)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) int count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) spin_lock_irqsave (&q->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) while (!skb_queue_empty(q)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) struct skb_data *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) struct urb *urb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) skb_queue_walk(q, skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) entry = (struct skb_data *) skb->cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) if (entry->state != unlink_start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) goto found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) found:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) entry->state = unlink_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) urb = entry->urb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) * Get reference count of the URB to avoid it to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) * freed during usb_unlink_urb, which may trigger
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) * use-after-free problem inside usb_unlink_urb since
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) * usb_unlink_urb is always racing with .complete
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) * handler(include defer_bh).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) usb_get_urb(urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) spin_unlock_irqrestore(&q->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) // during some PM-driven resume scenarios,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) // these (async) unlinks complete immediately
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) retval = usb_unlink_urb (urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) if (retval != -EINPROGRESS && retval != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) netdev_dbg(dev->net, "unlink urb err, %d\n", retval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) usb_put_urb(urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) spin_lock_irqsave(&q->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) spin_unlock_irqrestore (&q->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) // Flush all pending rx urbs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) // minidrivers may need to do this when the MTU changes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) void usbnet_unlink_rx_urbs(struct usbnet *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) if (netif_running(dev->net)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) (void) unlink_urbs (dev, &dev->rxq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) tasklet_schedule(&dev->bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) EXPORT_SYMBOL_GPL(usbnet_unlink_rx_urbs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) static void wait_skb_queue_empty(struct sk_buff_head *q)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) spin_lock_irqsave(&q->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) while (!skb_queue_empty(q)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) spin_unlock_irqrestore(&q->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) schedule_timeout(msecs_to_jiffies(UNLINK_TIMEOUT_MS));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) set_current_state(TASK_UNINTERRUPTIBLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) spin_lock_irqsave(&q->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) spin_unlock_irqrestore(&q->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) // precondition: never called in_interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) static void usbnet_terminate_urbs(struct usbnet *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) DECLARE_WAITQUEUE(wait, current);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) int temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) /* ensure there are no more active urbs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) add_wait_queue(&dev->wait, &wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) set_current_state(TASK_UNINTERRUPTIBLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) temp = unlink_urbs(dev, &dev->txq) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) unlink_urbs(dev, &dev->rxq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) /* maybe wait for deletions to finish. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) wait_skb_queue_empty(&dev->rxq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) wait_skb_queue_empty(&dev->txq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) wait_skb_queue_empty(&dev->done);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) netif_dbg(dev, ifdown, dev->net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) "waited for %d urb completions\n", temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) set_current_state(TASK_RUNNING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) remove_wait_queue(&dev->wait, &wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) int usbnet_stop (struct net_device *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) struct usbnet *dev = netdev_priv(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) const struct driver_info *info = dev->driver_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) int retval, pm, mpn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) clear_bit(EVENT_DEV_OPEN, &dev->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) netif_stop_queue (net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) netif_info(dev, ifdown, dev->net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) "stop stats: rx/tx %lu/%lu, errs %lu/%lu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) net->stats.rx_packets, net->stats.tx_packets,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) net->stats.rx_errors, net->stats.tx_errors);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) /* to not race resume */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) pm = usb_autopm_get_interface(dev->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) /* allow minidriver to stop correctly (wireless devices to turn off
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) * radio etc) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) if (info->stop) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) retval = info->stop(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) if (retval < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) netif_info(dev, ifdown, dev->net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) "stop fail (%d) usbnet usb-%s-%s, %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) retval,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) dev->udev->bus->bus_name, dev->udev->devpath,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) info->description);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) if (!(info->flags & FLAG_AVOID_UNLINK_URBS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) usbnet_terminate_urbs(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) usbnet_status_stop(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) usbnet_purge_paused_rxq(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) mpn = !test_and_clear_bit(EVENT_NO_RUNTIME_PM, &dev->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) /* deferred work (task, timer, softirq) must also stop.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) * can't flush_scheduled_work() until we drop rtnl (later),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) * else workers could deadlock; so make workers a NOP.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) dev->flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) del_timer_sync (&dev->delay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) tasklet_kill (&dev->bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) if (!pm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) usb_autopm_put_interface(dev->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) if (info->manage_power && mpn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) info->manage_power(dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) usb_autopm_put_interface(dev->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) EXPORT_SYMBOL_GPL(usbnet_stop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) // posts reads, and enables write queuing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) // precondition: never called in_interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) int usbnet_open (struct net_device *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) struct usbnet *dev = netdev_priv(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) const struct driver_info *info = dev->driver_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) if ((retval = usb_autopm_get_interface(dev->intf)) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) netif_info(dev, ifup, dev->net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) "resumption fail (%d) usbnet usb-%s-%s, %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) retval,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) dev->udev->bus->bus_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) dev->udev->devpath,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) info->description);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) goto done_nopm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) // put into "known safe" state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) if (info->reset && (retval = info->reset (dev)) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) netif_info(dev, ifup, dev->net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) "open reset fail (%d) usbnet usb-%s-%s, %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) retval,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) dev->udev->bus->bus_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) dev->udev->devpath,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) info->description);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) /* hard_mtu or rx_urb_size may change in reset() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) usbnet_update_max_qlen(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) // insist peer be connected
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) if (info->check_connect && (retval = info->check_connect (dev)) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) netif_dbg(dev, ifup, dev->net, "can't open; %d\n", retval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) /* start any status interrupt transfer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) if (dev->interrupt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) retval = usbnet_status_start(dev, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) if (retval < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) netif_err(dev, ifup, dev->net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) "intr submit %d\n", retval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) set_bit(EVENT_DEV_OPEN, &dev->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) netif_start_queue (net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) netif_info(dev, ifup, dev->net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) "open: enable queueing (rx %d, tx %d) mtu %d %s framing\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) (int)RX_QLEN(dev), (int)TX_QLEN(dev),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) dev->net->mtu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) (dev->driver_info->flags & FLAG_FRAMING_NC) ? "NetChip" :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) (dev->driver_info->flags & FLAG_FRAMING_GL) ? "GeneSys" :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) (dev->driver_info->flags & FLAG_FRAMING_Z) ? "Zaurus" :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) (dev->driver_info->flags & FLAG_FRAMING_RN) ? "RNDIS" :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) (dev->driver_info->flags & FLAG_FRAMING_AX) ? "ASIX" :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) "simple");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) /* reset rx error state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) dev->pkt_cnt = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) dev->pkt_err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) clear_bit(EVENT_RX_KILL, &dev->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) // delay posting reads until we're fully open
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) tasklet_schedule (&dev->bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) if (info->manage_power) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) retval = info->manage_power(dev, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) if (retval < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) retval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) set_bit(EVENT_NO_RUNTIME_PM, &dev->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) usb_autopm_put_interface(dev->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) usb_autopm_put_interface(dev->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) done_nopm:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) EXPORT_SYMBOL_GPL(usbnet_open);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) /* ethtool methods; minidrivers may need to add some more, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) * they'll probably want to use this base set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) int usbnet_get_link_ksettings(struct net_device *net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) struct ethtool_link_ksettings *cmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) struct usbnet *dev = netdev_priv(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) if (!dev->mii.mdio_read)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) mii_ethtool_get_link_ksettings(&dev->mii, cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) EXPORT_SYMBOL_GPL(usbnet_get_link_ksettings);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) int usbnet_set_link_ksettings(struct net_device *net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) const struct ethtool_link_ksettings *cmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) struct usbnet *dev = netdev_priv(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) if (!dev->mii.mdio_write)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) retval = mii_ethtool_set_link_ksettings(&dev->mii, cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) /* link speed/duplex might have changed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) if (dev->driver_info->link_reset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) dev->driver_info->link_reset(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) /* hard_mtu or rx_urb_size may change in link_reset() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) usbnet_update_max_qlen(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) EXPORT_SYMBOL_GPL(usbnet_set_link_ksettings);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) void usbnet_get_stats64(struct net_device *net, struct rtnl_link_stats64 *stats)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) struct usbnet *dev = netdev_priv(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) netdev_stats_to_stats64(stats, &net->stats);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) dev_fetch_sw_netstats(stats, dev->stats64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) EXPORT_SYMBOL_GPL(usbnet_get_stats64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) u32 usbnet_get_link (struct net_device *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) struct usbnet *dev = netdev_priv(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) /* If a check_connect is defined, return its result */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) if (dev->driver_info->check_connect)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) return dev->driver_info->check_connect (dev) == 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) /* if the device has mii operations, use those */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) if (dev->mii.mdio_read)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) return mii_link_ok(&dev->mii);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) /* Otherwise, dtrt for drivers calling netif_carrier_{on,off} */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) return ethtool_op_get_link(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) EXPORT_SYMBOL_GPL(usbnet_get_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) int usbnet_nway_reset(struct net_device *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) struct usbnet *dev = netdev_priv(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) if (!dev->mii.mdio_write)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) return mii_nway_restart(&dev->mii);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) EXPORT_SYMBOL_GPL(usbnet_nway_reset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) void usbnet_get_drvinfo (struct net_device *net, struct ethtool_drvinfo *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) struct usbnet *dev = netdev_priv(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) strlcpy (info->driver, dev->driver_name, sizeof info->driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) strlcpy (info->fw_version, dev->driver_info->description,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) sizeof info->fw_version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) usb_make_path (dev->udev, info->bus_info, sizeof info->bus_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) EXPORT_SYMBOL_GPL(usbnet_get_drvinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) u32 usbnet_get_msglevel (struct net_device *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) struct usbnet *dev = netdev_priv(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) return dev->msg_enable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) EXPORT_SYMBOL_GPL(usbnet_get_msglevel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) void usbnet_set_msglevel (struct net_device *net, u32 level)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) struct usbnet *dev = netdev_priv(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) dev->msg_enable = level;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) EXPORT_SYMBOL_GPL(usbnet_set_msglevel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) /* drivers may override default ethtool_ops in their bind() routine */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) static const struct ethtool_ops usbnet_ethtool_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) .get_link = usbnet_get_link,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) .nway_reset = usbnet_nway_reset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) .get_drvinfo = usbnet_get_drvinfo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) .get_msglevel = usbnet_get_msglevel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) .set_msglevel = usbnet_set_msglevel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) .get_ts_info = ethtool_op_get_ts_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) .get_link_ksettings = usbnet_get_link_ksettings,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) .set_link_ksettings = usbnet_set_link_ksettings,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) static void __handle_link_change(struct usbnet *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) if (!test_bit(EVENT_DEV_OPEN, &dev->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) if (!netif_carrier_ok(dev->net)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) /* kill URBs for reading packets to save bus bandwidth */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) unlink_urbs(dev, &dev->rxq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) * tx_timeout will unlink URBs for sending packets and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) * tx queue is stopped by netcore after link becomes off
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) /* submitting URBs for reading packets */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) tasklet_schedule(&dev->bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) /* hard_mtu or rx_urb_size may change during link change */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) usbnet_update_max_qlen(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) clear_bit(EVENT_LINK_CHANGE, &dev->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) void usbnet_set_rx_mode(struct net_device *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) struct usbnet *dev = netdev_priv(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) usbnet_defer_kevent(dev, EVENT_SET_RX_MODE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) EXPORT_SYMBOL_GPL(usbnet_set_rx_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) static void __handle_set_rx_mode(struct usbnet *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) if (dev->driver_info->set_rx_mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) (dev->driver_info->set_rx_mode)(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) clear_bit(EVENT_SET_RX_MODE, &dev->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) /* work that cannot be done in interrupt context uses keventd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) * NOTE: with 2.5 we could do more of this using completion callbacks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) * especially now that control transfers can be queued.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) usbnet_deferred_kevent (struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) struct usbnet *dev =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) container_of(work, struct usbnet, kevent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) /* usb_clear_halt() needs a thread context */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) if (test_bit (EVENT_TX_HALT, &dev->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) unlink_urbs (dev, &dev->txq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) status = usb_autopm_get_interface(dev->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) if (status < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) goto fail_pipe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) status = usb_clear_halt (dev->udev, dev->out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) usb_autopm_put_interface(dev->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) if (status < 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) status != -EPIPE &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) status != -ESHUTDOWN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) if (netif_msg_tx_err (dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) fail_pipe:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) netdev_err(dev->net, "can't clear tx halt, status %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) clear_bit (EVENT_TX_HALT, &dev->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) if (status != -ESHUTDOWN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) netif_wake_queue (dev->net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) if (test_bit (EVENT_RX_HALT, &dev->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) unlink_urbs (dev, &dev->rxq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) status = usb_autopm_get_interface(dev->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) if (status < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) goto fail_halt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) status = usb_clear_halt (dev->udev, dev->in);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) usb_autopm_put_interface(dev->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) if (status < 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) status != -EPIPE &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) status != -ESHUTDOWN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) if (netif_msg_rx_err (dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) fail_halt:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) netdev_err(dev->net, "can't clear rx halt, status %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) clear_bit (EVENT_RX_HALT, &dev->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) tasklet_schedule (&dev->bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) /* tasklet could resubmit itself forever if memory is tight */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) if (test_bit (EVENT_RX_MEMORY, &dev->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) struct urb *urb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) int resched = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) if (netif_running (dev->net))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) urb = usb_alloc_urb (0, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) clear_bit (EVENT_RX_MEMORY, &dev->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) if (urb != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) clear_bit (EVENT_RX_MEMORY, &dev->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) status = usb_autopm_get_interface(dev->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) if (status < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) usb_free_urb(urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) goto fail_lowmem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) if (rx_submit (dev, urb, GFP_KERNEL) == -ENOLINK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) resched = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) usb_autopm_put_interface(dev->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) fail_lowmem:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) if (resched)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) tasklet_schedule (&dev->bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) if (test_bit (EVENT_LINK_RESET, &dev->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) const struct driver_info *info = dev->driver_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) int retval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) clear_bit (EVENT_LINK_RESET, &dev->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) status = usb_autopm_get_interface(dev->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) if (status < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) goto skip_reset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) if(info->link_reset && (retval = info->link_reset(dev)) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) usb_autopm_put_interface(dev->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) skip_reset:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) netdev_info(dev->net, "link reset failed (%d) usbnet usb-%s-%s, %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) retval,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) dev->udev->bus->bus_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) dev->udev->devpath,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) info->description);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) usb_autopm_put_interface(dev->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) /* handle link change from link resetting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) __handle_link_change(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) if (test_bit (EVENT_LINK_CHANGE, &dev->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) __handle_link_change(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) if (test_bit (EVENT_SET_RX_MODE, &dev->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) __handle_set_rx_mode(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) if (dev->flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) netdev_dbg(dev->net, "kevent done, flags = 0x%lx\n", dev->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) static void tx_complete (struct urb *urb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) struct sk_buff *skb = (struct sk_buff *) urb->context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) struct skb_data *entry = (struct skb_data *) skb->cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) struct usbnet *dev = entry->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) if (urb->status == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) struct pcpu_sw_netstats *stats64 = this_cpu_ptr(dev->stats64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) flags = u64_stats_update_begin_irqsave(&stats64->syncp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) stats64->tx_packets += entry->packets;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) stats64->tx_bytes += entry->length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) u64_stats_update_end_irqrestore(&stats64->syncp, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) dev->net->stats.tx_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) switch (urb->status) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) case -EPIPE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) usbnet_defer_kevent (dev, EVENT_TX_HALT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) /* software-driven interface shutdown */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) case -ECONNRESET: // async unlink
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) case -ESHUTDOWN: // hardware gone
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) /* like rx, tx gets controller i/o faults during hub_wq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) * delays and so it uses the same throttling mechanism.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) case -EPROTO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) case -ETIME:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) case -EILSEQ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) usb_mark_last_busy(dev->udev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) if (!timer_pending (&dev->delay)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) mod_timer (&dev->delay,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) jiffies + THROTTLE_JIFFIES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) netif_dbg(dev, link, dev->net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) "tx throttle %d\n", urb->status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) netif_stop_queue (dev->net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) netif_dbg(dev, tx_err, dev->net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) "tx err %d\n", entry->urb->status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) usb_autopm_put_interface_async(dev->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) (void) defer_bh(dev, skb, &dev->txq, tx_done);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) void usbnet_tx_timeout (struct net_device *net, unsigned int txqueue)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) struct usbnet *dev = netdev_priv(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) unlink_urbs (dev, &dev->txq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) tasklet_schedule (&dev->bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) /* this needs to be handled individually because the generic layer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) * doesn't know what is sufficient and could not restore private
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) * information if a remedy of an unconditional reset were used.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) if (dev->driver_info->recover)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) (dev->driver_info->recover)(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) EXPORT_SYMBOL_GPL(usbnet_tx_timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) static int build_dma_sg(const struct sk_buff *skb, struct urb *urb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) unsigned num_sgs, total_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) int i, s = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293) num_sgs = skb_shinfo(skb)->nr_frags + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) if (num_sgs == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) /* reserve one for zero packet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) urb->sg = kmalloc_array(num_sgs + 1, sizeof(struct scatterlist),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) if (!urb->sg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) urb->num_sgs = num_sgs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) sg_init_table(urb->sg, urb->num_sgs + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) sg_set_buf(&urb->sg[s++], skb->data, skb_headlen(skb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) total_len += skb_headlen(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) skb_frag_t *f = &skb_shinfo(skb)->frags[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) total_len += skb_frag_size(f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) sg_set_page(&urb->sg[i + s], skb_frag_page(f), skb_frag_size(f),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) skb_frag_off(f));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) urb->transfer_buffer_length = total_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) netdev_tx_t usbnet_start_xmit (struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) struct net_device *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) struct usbnet *dev = netdev_priv(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) unsigned int length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) struct urb *urb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) struct skb_data *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) const struct driver_info *info = dev->driver_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) if (skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) skb_tx_timestamp(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) // some devices want funky USB-level framing, for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) // win32 driver (usually) and/or hardware quirks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) if (info->tx_fixup) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) skb = info->tx_fixup (dev, skb, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) if (!skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) /* packet collected; minidriver waiting for more */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) if (info->flags & FLAG_MULTI_PACKET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) goto not_drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) netif_dbg(dev, tx_err, dev->net, "can't tx_fixup skb\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) if (!(urb = usb_alloc_urb (0, GFP_ATOMIC))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) netif_dbg(dev, tx_err, dev->net, "no urb\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) entry = (struct skb_data *) skb->cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) entry->urb = urb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) entry->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) usb_fill_bulk_urb (urb, dev->udev, dev->out,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) skb->data, skb->len, tx_complete, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) if (dev->can_dma_sg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) if (build_dma_sg(skb, urb) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361) goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) length = urb->transfer_buffer_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) /* don't assume the hardware handles USB_ZERO_PACKET
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) * NOTE: strictly conforming cdc-ether devices should expect
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) * the ZLP here, but ignore the one-byte packet.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) * NOTE2: CDC NCM specification is different from CDC ECM when
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) * handling ZLP/short packets, so cdc_ncm driver will make short
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) * packet itself if needed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) if (length % dev->maxpacket == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) if (!(info->flags & FLAG_SEND_ZLP)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) if (!(info->flags & FLAG_MULTI_PACKET)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) length++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) if (skb_tailroom(skb) && !urb->num_sgs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) skb->data[skb->len] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) __skb_put(skb, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379) } else if (urb->num_sgs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) sg_set_buf(&urb->sg[urb->num_sgs++],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) dev->padding_pkt, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) urb->transfer_flags |= URB_ZERO_PACKET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) urb->transfer_buffer_length = length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388) if (info->flags & FLAG_MULTI_PACKET) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) /* Driver has set number of packets and a length delta.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) * Calculate the complete length and ensure that it's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391) * positive.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) entry->length += length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) if (WARN_ON_ONCE(entry->length <= 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) entry->length = length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397) usbnet_set_skb_tx_stats(skb, 1, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) spin_lock_irqsave(&dev->txq.lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) retval = usb_autopm_get_interface_async(dev->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402) if (retval < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) spin_unlock_irqrestore(&dev->txq.lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) if (netif_queue_stopped(net)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407) usb_autopm_put_interface_async(dev->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) spin_unlock_irqrestore(&dev->txq.lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412) #ifdef CONFIG_PM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) /* if this triggers the device is still a sleep */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) if (test_bit(EVENT_DEV_ASLEEP, &dev->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415) /* transmission will be done in resume */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) usb_anchor_urb(urb, &dev->deferred);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) /* no use to process more packets */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418) netif_stop_queue(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) usb_put_urb(urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) spin_unlock_irqrestore(&dev->txq.lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) netdev_dbg(dev->net, "Delaying transmission for resumption\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422) goto deferred;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) switch ((retval = usb_submit_urb (urb, GFP_ATOMIC))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427) case -EPIPE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428) netif_stop_queue (net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) usbnet_defer_kevent (dev, EVENT_TX_HALT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430) usb_autopm_put_interface_async(dev->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) usb_autopm_put_interface_async(dev->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) netif_dbg(dev, tx_err, dev->net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) "tx: submit urb err %d\n", retval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437) case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438) netif_trans_update(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439) __usbnet_queue_skb(&dev->txq, skb, tx_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440) if (dev->txq.qlen >= TX_QLEN (dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441) netif_stop_queue (net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) spin_unlock_irqrestore (&dev->txq.lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445) if (retval) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446) netif_dbg(dev, tx_err, dev->net, "drop, code %d\n", retval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447) drop:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448) dev->net->stats.tx_dropped++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) not_drop:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450) if (skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) dev_kfree_skb_any (skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452) if (urb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453) kfree(urb->sg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454) usb_free_urb(urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457) netif_dbg(dev, tx_queued, dev->net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458) "> tx, len %u, type 0x%x\n", length, skb->protocol);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459) #ifdef CONFIG_PM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460) deferred:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462) return NETDEV_TX_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) EXPORT_SYMBOL_GPL(usbnet_start_xmit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466) static int rx_alloc_submit(struct usbnet *dev, gfp_t flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468) struct urb *urb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472) /* don't refill the queue all at once */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473) for (i = 0; i < 10 && dev->rxq.qlen < RX_QLEN(dev); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474) urb = usb_alloc_urb(0, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475) if (urb != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476) ret = rx_submit(dev, urb, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490) // tasklet (work deferred from completions, in_irq) or timer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492) static void usbnet_bh (struct timer_list *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494) struct usbnet *dev = from_timer(dev, t, delay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) struct skb_data *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498) while ((skb = skb_dequeue (&dev->done))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) entry = (struct skb_data *) skb->cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500) switch (entry->state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501) case rx_done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502) entry->state = rx_cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503) rx_process (dev, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505) case tx_done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) kfree(entry->urb->sg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) case rx_cleanup:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509) usb_free_urb (entry->urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510) dev_kfree_skb (skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) netdev_dbg(dev->net, "bogus skb state %d\n", entry->state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517) /* restart RX again after disabling due to high error rate */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518) clear_bit(EVENT_RX_KILL, &dev->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520) /* waiting for all pending urbs to complete?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521) * only then can we forgo submitting anew
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523) if (waitqueue_active(&dev->wait)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524) if (dev->txq.qlen + dev->rxq.qlen + dev->done.qlen == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525) wake_up_all(&dev->wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527) // or are we maybe short a few urbs?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528) } else if (netif_running (dev->net) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529) netif_device_present (dev->net) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530) netif_carrier_ok(dev->net) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531) !timer_pending(&dev->delay) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) !test_bit(EVENT_RX_PAUSED, &dev->flags) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533) !test_bit(EVENT_RX_HALT, &dev->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534) int temp = dev->rxq.qlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) if (temp < RX_QLEN(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537) if (rx_alloc_submit(dev, GFP_ATOMIC) == -ENOLINK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539) if (temp != dev->rxq.qlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540) netif_dbg(dev, link, dev->net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) "rxqlen %d --> %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542) temp, dev->rxq.qlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543) if (dev->rxq.qlen < RX_QLEN(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544) tasklet_schedule (&dev->bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546) if (dev->txq.qlen < TX_QLEN (dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547) netif_wake_queue (dev->net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551) static void usbnet_bh_tasklet(unsigned long data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553) struct timer_list *t = (struct timer_list *)data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555) usbnet_bh(t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559) /*-------------------------------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561) * USB Device Driver support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563) *-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565) // precondition: never called in_interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) void usbnet_disconnect (struct usb_interface *intf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569) struct usbnet *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570) struct usb_device *xdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571) struct net_device *net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573) dev = usb_get_intfdata(intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574) usb_set_intfdata(intf, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575) if (!dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578) xdev = interface_to_usbdev (intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580) netif_info(dev, probe, dev->net, "unregister '%s' usb-%s-%s, %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581) intf->dev.driver->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582) xdev->bus->bus_name, xdev->devpath,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583) dev->driver_info->description);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585) net = dev->net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) unregister_netdev (net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588) cancel_work_sync(&dev->kevent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590) usb_scuttle_anchored_urbs(&dev->deferred);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592) if (dev->driver_info->unbind)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593) dev->driver_info->unbind (dev, intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) usb_kill_urb(dev->interrupt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596) usb_free_urb(dev->interrupt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597) kfree(dev->padding_pkt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599) free_percpu(dev->stats64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600) free_netdev(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602) EXPORT_SYMBOL_GPL(usbnet_disconnect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604) static const struct net_device_ops usbnet_netdev_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) .ndo_open = usbnet_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606) .ndo_stop = usbnet_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607) .ndo_start_xmit = usbnet_start_xmit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608) .ndo_tx_timeout = usbnet_tx_timeout,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609) .ndo_set_rx_mode = usbnet_set_rx_mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610) .ndo_change_mtu = usbnet_change_mtu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611) .ndo_get_stats64 = usbnet_get_stats64,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612) .ndo_set_mac_address = eth_mac_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613) .ndo_validate_addr = eth_validate_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618) // precondition: never called in_interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620) static struct device_type wlan_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621) .name = "wlan",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) static struct device_type wwan_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625) .name = "wwan",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629) usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631) struct usbnet *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632) struct net_device *net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633) struct usb_host_interface *interface;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) const struct driver_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635) struct usb_device *xdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637) const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638) struct usb_driver *driver = to_usb_driver(udev->dev.driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640) /* usbnet already took usb runtime pm, so have to enable the feature
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641) * for usb interface, otherwise usb_autopm_get_interface may return
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642) * failure if RUNTIME_PM is enabled.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644) if (!driver->supports_autosuspend) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645) driver->supports_autosuspend = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646) pm_runtime_enable(&udev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649) name = udev->dev.driver->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1650) info = (const struct driver_info *) prod->driver_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1651) if (!info) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1652) dev_dbg (&udev->dev, "blacklisted by %s\n", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1653) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1654) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1655) xdev = interface_to_usbdev (udev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1656) interface = udev->cur_altsetting;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1657)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1658) status = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1659)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1660) // set up our own records
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1661) net = alloc_etherdev(sizeof(*dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1662) if (!net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1663) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1665) /* netdev_printk() needs this so do it as early as possible */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1666) SET_NETDEV_DEV(net, &udev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1667)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1668) dev = netdev_priv(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1669) dev->udev = xdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1670) dev->intf = udev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1671) dev->driver_info = info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1672) dev->driver_name = name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1674) dev->stats64 = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1675) if (!dev->stats64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1676) goto out0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1677)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1678) dev->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1679) | NETIF_MSG_PROBE | NETIF_MSG_LINK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1680) init_waitqueue_head(&dev->wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1681) skb_queue_head_init (&dev->rxq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1682) skb_queue_head_init (&dev->txq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1683) skb_queue_head_init (&dev->done);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1684) skb_queue_head_init(&dev->rxq_pause);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1685) dev->bh.func = usbnet_bh_tasklet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1686) dev->bh.data = (unsigned long)&dev->delay;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1687) INIT_WORK (&dev->kevent, usbnet_deferred_kevent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1688) init_usb_anchor(&dev->deferred);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1689) timer_setup(&dev->delay, usbnet_bh, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1690) mutex_init (&dev->phy_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1691) mutex_init(&dev->interrupt_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1692) dev->interrupt_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1693)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1694) dev->net = net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1695) strcpy (net->name, "usb%d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1696) memcpy (net->dev_addr, node_id, sizeof node_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1697)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1698) /* rx and tx sides can use different message sizes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1699) * bind() should set rx_urb_size in that case.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1700) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1701) dev->hard_mtu = net->mtu + net->hard_header_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1702) net->min_mtu = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1703) net->max_mtu = ETH_MAX_MTU;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1704)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1705) net->netdev_ops = &usbnet_netdev_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1706) net->watchdog_timeo = TX_TIMEOUT_JIFFIES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1707) net->ethtool_ops = &usbnet_ethtool_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1708)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1709) // allow device-specific bind/init procedures
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1710) // NOTE net->name still not usable ...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1711) if (info->bind) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1712) status = info->bind (dev, udev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1713) if (status < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1714) goto out1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1716) // heuristic: "usb%d" for links we know are two-host,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1717) // else "eth%d" when there's reasonable doubt. userspace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1718) // can rename the link if it knows better.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1719) if ((dev->driver_info->flags & FLAG_ETHER) != 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1720) ((dev->driver_info->flags & FLAG_POINTTOPOINT) == 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1721) (net->dev_addr [0] & 0x02) == 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1722) strcpy (net->name, "eth%d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1723) /* WLAN devices should always be named "wlan%d" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1724) if ((dev->driver_info->flags & FLAG_WLAN) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1725) strcpy(net->name, "wlan%d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1726) /* WWAN devices should always be named "wwan%d" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1727) if ((dev->driver_info->flags & FLAG_WWAN) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1728) strcpy(net->name, "wwan%d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1729)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1730) /* devices that cannot do ARP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1731) if ((dev->driver_info->flags & FLAG_NOARP) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1732) net->flags |= IFF_NOARP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1733)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1734) /* maybe the remote can't receive an Ethernet MTU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1735) if (net->mtu > (dev->hard_mtu - net->hard_header_len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1736) net->mtu = dev->hard_mtu - net->hard_header_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1737) } else if (!info->in || !info->out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1738) status = usbnet_get_endpoints (dev, udev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1739) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1740) dev->in = usb_rcvbulkpipe (xdev, info->in);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1741) dev->out = usb_sndbulkpipe (xdev, info->out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1742) if (!(info->flags & FLAG_NO_SETINT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1743) status = usb_set_interface (xdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1744) interface->desc.bInterfaceNumber,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1745) interface->desc.bAlternateSetting);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1746) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1747) status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1748)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1749) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1750) if (status >= 0 && dev->status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1751) status = init_status (dev, udev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1752) if (status < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1753) goto out3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1754)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1755) if (!dev->rx_urb_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1756) dev->rx_urb_size = dev->hard_mtu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1757) dev->maxpacket = usb_maxpacket (dev->udev, dev->out, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1758) if (dev->maxpacket == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1759) /* that is a broken device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1760) status = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1761) goto out4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1762) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1763)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1764) /* let userspace know we have a random address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1765) if (ether_addr_equal(net->dev_addr, node_id))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1766) net->addr_assign_type = NET_ADDR_RANDOM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1767)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1768) if ((dev->driver_info->flags & FLAG_WLAN) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1769) SET_NETDEV_DEVTYPE(net, &wlan_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1770) if ((dev->driver_info->flags & FLAG_WWAN) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1771) SET_NETDEV_DEVTYPE(net, &wwan_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1772)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1773) /* initialize max rx_qlen and tx_qlen */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1774) usbnet_update_max_qlen(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1775)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1776) if (dev->can_dma_sg && !(info->flags & FLAG_SEND_ZLP) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1777) !(info->flags & FLAG_MULTI_PACKET)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1778) dev->padding_pkt = kzalloc(1, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1779) if (!dev->padding_pkt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1780) status = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1781) goto out4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1782) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1783) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1784)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1785) status = register_netdev (net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1786) if (status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1787) goto out5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1788) netif_info(dev, probe, dev->net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1789) "register '%s' at usb-%s-%s, %s, %pM\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1790) udev->dev.driver->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1791) xdev->bus->bus_name, xdev->devpath,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1792) dev->driver_info->description,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1793) net->dev_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1794)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1795) // ok, it's ready to go.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1796) usb_set_intfdata (udev, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1797)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1798) netif_device_attach (net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1799)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1800) if (dev->driver_info->flags & FLAG_LINK_INTR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1801) usbnet_link_change(dev, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1802)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1803) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1804)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1805) out5:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1806) kfree(dev->padding_pkt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1807) out4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1808) usb_free_urb(dev->interrupt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1809) out3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1810) if (info->unbind)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1811) info->unbind (dev, udev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1812) out1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1813) /* subdrivers must undo all they did in bind() if they
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1814) * fail it, but we may fail later and a deferred kevent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1815) * may trigger an error resubmitting itself and, worse,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1816) * schedule a timer. So we kill it all just in case.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1817) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1818) cancel_work_sync(&dev->kevent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1819) del_timer_sync(&dev->delay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1820) free_percpu(dev->stats64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1821) out0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1822) free_netdev(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1823) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1824) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1825) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1826) EXPORT_SYMBOL_GPL(usbnet_probe);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1827)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1828) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1829)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1830) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1831) * suspend the whole driver as soon as the first interface is suspended
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1832) * resume only when the last interface is resumed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1833) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1834)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1835) int usbnet_suspend (struct usb_interface *intf, pm_message_t message)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1836) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1837) struct usbnet *dev = usb_get_intfdata(intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1838)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1839) if (!dev->suspend_count++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1840) spin_lock_irq(&dev->txq.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1841) /* don't autosuspend while transmitting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1842) if (dev->txq.qlen && PMSG_IS_AUTO(message)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1843) dev->suspend_count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1844) spin_unlock_irq(&dev->txq.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1845) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1846) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1847) set_bit(EVENT_DEV_ASLEEP, &dev->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1848) spin_unlock_irq(&dev->txq.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1849) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1850) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1851) * accelerate emptying of the rx and queues, to avoid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1852) * having everything error out.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1853) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1854) netif_device_detach (dev->net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1855) usbnet_terminate_urbs(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1856) __usbnet_status_stop_force(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1857)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1858) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1859) * reattach so runtime management can use and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1860) * wake the device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1861) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1862) netif_device_attach (dev->net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1863) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1864) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1865) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1866) EXPORT_SYMBOL_GPL(usbnet_suspend);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1867)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1868) int usbnet_resume (struct usb_interface *intf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1869) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1870) struct usbnet *dev = usb_get_intfdata(intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1871) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1872) struct urb *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1873) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1874)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1875) if (!--dev->suspend_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1876) /* resume interrupt URB if it was previously submitted */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1877) __usbnet_status_start_force(dev, GFP_NOIO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1878)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1879) spin_lock_irq(&dev->txq.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1880) while ((res = usb_get_from_anchor(&dev->deferred))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1881)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1882) skb = (struct sk_buff *)res->context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1883) retval = usb_submit_urb(res, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1884) if (retval < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1885) dev_kfree_skb_any(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1886) kfree(res->sg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1887) usb_free_urb(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1888) usb_autopm_put_interface_async(dev->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1889) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1890) netif_trans_update(dev->net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1891) __skb_queue_tail(&dev->txq, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1892) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1893) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1894)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1895) smp_mb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1896) clear_bit(EVENT_DEV_ASLEEP, &dev->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1897) spin_unlock_irq(&dev->txq.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1898)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1899) if (test_bit(EVENT_DEV_OPEN, &dev->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1900) /* handle remote wakeup ASAP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1901) * we cannot race against stop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1902) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1903) if (netif_device_present(dev->net) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1904) !timer_pending(&dev->delay) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1905) !test_bit(EVENT_RX_HALT, &dev->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1906) rx_alloc_submit(dev, GFP_NOIO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1907)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1908) if (!(dev->txq.qlen >= TX_QLEN(dev)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1909) netif_tx_wake_all_queues(dev->net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1910) tasklet_schedule (&dev->bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1911) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1912) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1913)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1914) if (test_and_clear_bit(EVENT_DEVICE_REPORT_IDLE, &dev->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1915) usb_autopm_get_interface_no_resume(intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1916)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1917) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1918) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1919) EXPORT_SYMBOL_GPL(usbnet_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1920)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1921) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1922) * Either a subdriver implements manage_power, then it is assumed to always
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1923) * be ready to be suspended or it reports the readiness to be suspended
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1924) * explicitly
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1925) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1926) void usbnet_device_suggests_idle(struct usbnet *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1927) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1928) if (!test_and_set_bit(EVENT_DEVICE_REPORT_IDLE, &dev->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1929) dev->intf->needs_remote_wakeup = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1930) usb_autopm_put_interface_async(dev->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1931) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1932) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1933) EXPORT_SYMBOL(usbnet_device_suggests_idle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1934)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1935) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1936) * For devices that can do without special commands
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1937) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1938) int usbnet_manage_power(struct usbnet *dev, int on)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1939) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1940) dev->intf->needs_remote_wakeup = on;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1941) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1942) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1943) EXPORT_SYMBOL(usbnet_manage_power);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1944)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1945) void usbnet_link_change(struct usbnet *dev, bool link, bool need_reset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1946) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1947) /* update link after link is reseted */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1948) if (link && !need_reset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1949) netif_carrier_on(dev->net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1950) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1951) netif_carrier_off(dev->net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1952)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1953) if (need_reset && link)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1954) usbnet_defer_kevent(dev, EVENT_LINK_RESET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1955) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1956) usbnet_defer_kevent(dev, EVENT_LINK_CHANGE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1957) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1958) EXPORT_SYMBOL(usbnet_link_change);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1959)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1960) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1961) static int __usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1962) u16 value, u16 index, void *data, u16 size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1963) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1964) void *buf = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1965) int err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1966)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1967) netdev_dbg(dev->net, "usbnet_read_cmd cmd=0x%02x reqtype=%02x"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1968) " value=0x%04x index=0x%04x size=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1969) cmd, reqtype, value, index, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1970)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1971) if (size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1972) buf = kmalloc(size, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1973) if (!buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1974) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1975) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1976)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1977) err = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1978) cmd, reqtype, value, index, buf, size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1979) USB_CTRL_GET_TIMEOUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1980) if (err > 0 && err <= size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1981) if (data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1982) memcpy(data, buf, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1983) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1984) netdev_dbg(dev->net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1985) "Huh? Data requested but thrown away.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1986) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1987) kfree(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1988) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1989) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1990) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1991)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1992) static int __usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1993) u16 value, u16 index, const void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1994) u16 size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1995) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1996) void *buf = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1997) int err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1998)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1999) netdev_dbg(dev->net, "usbnet_write_cmd cmd=0x%02x reqtype=%02x"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2000) " value=0x%04x index=0x%04x size=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2001) cmd, reqtype, value, index, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2002)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2003) if (data) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2004) buf = kmemdup(data, size, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2005) if (!buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2006) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2007) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2008) if (size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2009) WARN_ON_ONCE(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2010) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2011) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2012) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2013) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2014)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2015) err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2016) cmd, reqtype, value, index, buf, size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2017) USB_CTRL_SET_TIMEOUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2018) kfree(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2019)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2020) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2021) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2022) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2023)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2024) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2025) * The function can't be called inside suspend/resume callback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2026) * otherwise deadlock will be caused.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2027) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2028) int usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2029) u16 value, u16 index, void *data, u16 size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2030) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2031) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2032)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2033) if (usb_autopm_get_interface(dev->intf) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2034) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2035) ret = __usbnet_read_cmd(dev, cmd, reqtype, value, index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2036) data, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2037) usb_autopm_put_interface(dev->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2038) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2039) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2040) EXPORT_SYMBOL_GPL(usbnet_read_cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2041)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2042) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2043) * The function can't be called inside suspend/resume callback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2044) * otherwise deadlock will be caused.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2045) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2046) int usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2047) u16 value, u16 index, const void *data, u16 size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2048) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2049) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2050)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2051) if (usb_autopm_get_interface(dev->intf) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2052) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2053) ret = __usbnet_write_cmd(dev, cmd, reqtype, value, index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2054) data, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2055) usb_autopm_put_interface(dev->intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2056) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2057) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2058) EXPORT_SYMBOL_GPL(usbnet_write_cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2059)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2060) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2061) * The function can be called inside suspend/resume callback safely
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2062) * and should only be called by suspend/resume callback generally.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2063) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2064) int usbnet_read_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2065) u16 value, u16 index, void *data, u16 size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2066) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2067) return __usbnet_read_cmd(dev, cmd, reqtype, value, index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2068) data, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2069) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2070) EXPORT_SYMBOL_GPL(usbnet_read_cmd_nopm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2071)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2072) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2073) * The function can be called inside suspend/resume callback safely
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2074) * and should only be called by suspend/resume callback generally.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2075) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2076) int usbnet_write_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2077) u16 value, u16 index, const void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2078) u16 size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2079) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2080) return __usbnet_write_cmd(dev, cmd, reqtype, value, index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2081) data, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2082) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2083) EXPORT_SYMBOL_GPL(usbnet_write_cmd_nopm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2084)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2085) static void usbnet_async_cmd_cb(struct urb *urb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2086) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2087) struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2088) int status = urb->status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2089)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2090) if (status < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2091) dev_dbg(&urb->dev->dev, "%s failed with %d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2092) __func__, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2093)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2094) kfree(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2095) usb_free_urb(urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2096) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2097)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2098) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2099) * The caller must make sure that device can't be put into suspend
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2100) * state until the control URB completes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2101) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2102) int usbnet_write_cmd_async(struct usbnet *dev, u8 cmd, u8 reqtype,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2103) u16 value, u16 index, const void *data, u16 size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2105) struct usb_ctrlrequest *req = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2106) struct urb *urb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2107) int err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2108) void *buf = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2110) netdev_dbg(dev->net, "usbnet_write_cmd cmd=0x%02x reqtype=%02x"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2111) " value=0x%04x index=0x%04x size=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2112) cmd, reqtype, value, index, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2114) urb = usb_alloc_urb(0, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2115) if (!urb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2116) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2118) if (data) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2119) buf = kmemdup(data, size, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2120) if (!buf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2121) netdev_err(dev->net, "Error allocating buffer"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2122) " in %s!\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2123) goto fail_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2127) req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2128) if (!req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2129) goto fail_free_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2131) req->bRequestType = reqtype;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2132) req->bRequest = cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2133) req->wValue = cpu_to_le16(value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2134) req->wIndex = cpu_to_le16(index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2135) req->wLength = cpu_to_le16(size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2137) usb_fill_control_urb(urb, dev->udev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2138) usb_sndctrlpipe(dev->udev, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2139) (void *)req, buf, size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2140) usbnet_async_cmd_cb, req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2141) urb->transfer_flags |= URB_FREE_BUFFER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2143) err = usb_submit_urb(urb, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2144) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2145) netdev_err(dev->net, "Error submitting the control"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2146) " message: status=%d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2147) goto fail_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2149) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2151) fail_free_buf:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2152) kfree(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2153) fail_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2154) kfree(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2155) usb_free_urb(urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2156) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2157) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2160) EXPORT_SYMBOL_GPL(usbnet_write_cmd_async);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2161) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2163) static int __init usbnet_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2165) /* Compiler should optimize this out. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2166) BUILD_BUG_ON(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2167) sizeof_field(struct sk_buff, cb) < sizeof(struct skb_data));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2169) eth_random_addr(node_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2170) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2172) module_init(usbnet_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2174) static void __exit usbnet_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2175) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2177) module_exit(usbnet_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2179) MODULE_AUTHOR("David Brownell");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2180) MODULE_DESCRIPTION("USB network driver framework");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2181) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags