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![Steven Rostedt (Google)](/assets/img/avatar_default.png)
Due to several bugs caused by timers being re-armed after they are shutdown and just before they are freed, a new state of timers was added called "shutdown". After a timer is set to this state, then it can no longer be re-armed. The following script was run to find all the trivial locations where del_timer() or del_timer_sync() is called in the same function that the object holding the timer is freed. It also ignores any locations where the timer->function is modified between the del_timer*() and the free(), as that is not considered a "trivial" case. This was created by using a coccinelle script and the following commands: $ cat timer.cocci @@ expression ptr, slab; identifier timer, rfield; @@ ( - del_timer(&ptr->timer); + timer_shutdown(&ptr->timer); | - del_timer_sync(&ptr->timer); + timer_shutdown_sync(&ptr->timer); ) ... when strict when != ptr->timer ( kfree_rcu(ptr, rfield); | kmem_cache_free(slab, ptr); | kfree(ptr); ) $ spatch timer.cocci . > /tmp/t.patch $ patch -p1 < /tmp/t.patch Link: https://lore.kernel.org/lkml/20221123201306.823305113@linutronix.de/ Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> Acked-by: Pavel Machek <pavel@ucw.cz> [ LED ] Acked-by: Kalle Valo <kvalo@kernel.org> [ wireless ] Acked-by: Paolo Abeni <pabeni@redhat.com> [ networking ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
973 lines
28 KiB
C
973 lines
28 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* USB-to-WWAN Driver for Sierra Wireless modems
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*
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* Copyright (C) 2008, 2009, 2010 Paxton Smith, Matthew Safar, Rory Filer
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* <linux@sierrawireless.com>
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*
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* Portions of this based on the cdc_ether driver by David Brownell (2003-2005)
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* and Ole Andre Vadla Ravnas (ActiveSync) (2006).
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*
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* IMPORTANT DISCLAIMER: This driver is not commercially supported by
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* Sierra Wireless. Use at your own risk.
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*/
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#define DRIVER_VERSION "v.2.0"
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#define DRIVER_AUTHOR "Paxton Smith, Matthew Safar, Rory Filer"
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#define DRIVER_DESC "USB-to-WWAN Driver for Sierra Wireless modems"
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static const char driver_name[] = "sierra_net";
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/* if defined debug messages enabled */
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/*#define DEBUG*/
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#include <linux/module.h>
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#include <linux/etherdevice.h>
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#include <linux/ethtool.h>
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#include <linux/mii.h>
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#include <linux/sched.h>
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#include <linux/timer.h>
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#include <linux/usb.h>
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#include <linux/usb/cdc.h>
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#include <net/ip.h>
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#include <net/udp.h>
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#include <asm/unaligned.h>
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#include <linux/usb/usbnet.h>
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#define SWI_USB_REQUEST_GET_FW_ATTR 0x06
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#define SWI_GET_FW_ATTR_MASK 0x08
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/* atomic counter partially included in MAC address to make sure 2 devices
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* do not end up with the same MAC - concept breaks in case of > 255 ifaces
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*/
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static atomic_t iface_counter = ATOMIC_INIT(0);
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/*
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* SYNC Timer Delay definition used to set the expiry time
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*/
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#define SIERRA_NET_SYNCDELAY (2*HZ)
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/* Max. MTU supported. The modem buffers are limited to 1500 */
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#define SIERRA_NET_MAX_SUPPORTED_MTU 1500
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/* The SIERRA_NET_USBCTL_BUF_LEN defines a buffer size allocated for control
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* message reception ... and thus the max. received packet.
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* (May be the cause for parse_hip returning -EINVAL)
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*/
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#define SIERRA_NET_USBCTL_BUF_LEN 1024
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/* Overriding the default usbnet rx_urb_size */
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#define SIERRA_NET_RX_URB_SIZE (8 * 1024)
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/* Private data structure */
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struct sierra_net_data {
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u16 link_up; /* air link up or down */
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u8 tx_hdr_template[4]; /* part of HIP hdr for tx'd packets */
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u8 sync_msg[4]; /* SYNC message */
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u8 shdwn_msg[4]; /* Shutdown message */
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/* Backpointer to the container */
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struct usbnet *usbnet;
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u8 ifnum; /* interface number */
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/* Bit masks, must be a power of 2 */
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#define SIERRA_NET_EVENT_RESP_AVAIL 0x01
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#define SIERRA_NET_TIMER_EXPIRY 0x02
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unsigned long kevent_flags;
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struct work_struct sierra_net_kevent;
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struct timer_list sync_timer; /* For retrying SYNC sequence */
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};
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struct param {
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int is_present;
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union {
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void *ptr;
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u32 dword;
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u16 word;
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u8 byte;
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};
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};
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/* HIP message type */
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#define SIERRA_NET_HIP_EXTENDEDID 0x7F
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#define SIERRA_NET_HIP_HSYNC_ID 0x60 /* Modem -> host */
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#define SIERRA_NET_HIP_RESTART_ID 0x62 /* Modem -> host */
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#define SIERRA_NET_HIP_MSYNC_ID 0x20 /* Host -> modem */
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#define SIERRA_NET_HIP_SHUTD_ID 0x26 /* Host -> modem */
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#define SIERRA_NET_HIP_EXT_IP_IN_ID 0x0202
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#define SIERRA_NET_HIP_EXT_IP_OUT_ID 0x0002
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/* 3G UMTS Link Sense Indication definitions */
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#define SIERRA_NET_HIP_LSI_UMTSID 0x78
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/* Reverse Channel Grant Indication HIP message */
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#define SIERRA_NET_HIP_RCGI 0x64
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/* LSI Protocol types */
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#define SIERRA_NET_PROTOCOL_UMTS 0x01
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#define SIERRA_NET_PROTOCOL_UMTS_DS 0x04
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/* LSI Coverage */
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#define SIERRA_NET_COVERAGE_NONE 0x00
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#define SIERRA_NET_COVERAGE_NOPACKET 0x01
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/* LSI Session */
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#define SIERRA_NET_SESSION_IDLE 0x00
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/* LSI Link types */
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#define SIERRA_NET_AS_LINK_TYPE_IPV4 0x00
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#define SIERRA_NET_AS_LINK_TYPE_IPV6 0x02
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struct lsi_umts {
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u8 protocol;
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u8 unused1;
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__be16 length;
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/* eventually use a union for the rest - assume umts for now */
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u8 coverage;
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u8 network_len; /* network name len */
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u8 network[40]; /* network name (UCS2, bigendian) */
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u8 session_state;
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u8 unused3[33];
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} __packed;
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struct lsi_umts_single {
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struct lsi_umts lsi;
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u8 link_type;
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u8 pdp_addr_len; /* NW-supplied PDP address len */
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u8 pdp_addr[16]; /* NW-supplied PDP address (bigendian)) */
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u8 unused4[23];
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u8 dns1_addr_len; /* NW-supplied 1st DNS address len (bigendian) */
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u8 dns1_addr[16]; /* NW-supplied 1st DNS address */
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u8 dns2_addr_len; /* NW-supplied 2nd DNS address len */
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u8 dns2_addr[16]; /* NW-supplied 2nd DNS address (bigendian)*/
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u8 wins1_addr_len; /* NW-supplied 1st Wins address len */
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u8 wins1_addr[16]; /* NW-supplied 1st Wins address (bigendian)*/
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u8 wins2_addr_len; /* NW-supplied 2nd Wins address len */
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u8 wins2_addr[16]; /* NW-supplied 2nd Wins address (bigendian) */
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u8 unused5[4];
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u8 gw_addr_len; /* NW-supplied GW address len */
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u8 gw_addr[16]; /* NW-supplied GW address (bigendian) */
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u8 reserved[8];
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} __packed;
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struct lsi_umts_dual {
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struct lsi_umts lsi;
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u8 pdp_addr4_len; /* NW-supplied PDP IPv4 address len */
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u8 pdp_addr4[4]; /* NW-supplied PDP IPv4 address (bigendian)) */
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u8 pdp_addr6_len; /* NW-supplied PDP IPv6 address len */
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u8 pdp_addr6[16]; /* NW-supplied PDP IPv6 address (bigendian)) */
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u8 unused4[23];
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u8 dns1_addr4_len; /* NW-supplied 1st DNS v4 address len (bigendian) */
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u8 dns1_addr4[4]; /* NW-supplied 1st DNS v4 address */
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u8 dns1_addr6_len; /* NW-supplied 1st DNS v6 address len */
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u8 dns1_addr6[16]; /* NW-supplied 1st DNS v6 address (bigendian)*/
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u8 dns2_addr4_len; /* NW-supplied 2nd DNS v4 address len (bigendian) */
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u8 dns2_addr4[4]; /* NW-supplied 2nd DNS v4 address */
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u8 dns2_addr6_len; /* NW-supplied 2nd DNS v6 address len */
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u8 dns2_addr6[16]; /* NW-supplied 2nd DNS v6 address (bigendian)*/
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u8 unused5[68];
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} __packed;
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#define SIERRA_NET_LSI_COMMON_LEN 4
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#define SIERRA_NET_LSI_UMTS_LEN (sizeof(struct lsi_umts_single))
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#define SIERRA_NET_LSI_UMTS_STATUS_LEN \
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(SIERRA_NET_LSI_UMTS_LEN - SIERRA_NET_LSI_COMMON_LEN)
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#define SIERRA_NET_LSI_UMTS_DS_LEN (sizeof(struct lsi_umts_dual))
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#define SIERRA_NET_LSI_UMTS_DS_STATUS_LEN \
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(SIERRA_NET_LSI_UMTS_DS_LEN - SIERRA_NET_LSI_COMMON_LEN)
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/* Our own net device operations structure */
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static const struct net_device_ops sierra_net_device_ops = {
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.ndo_open = usbnet_open,
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.ndo_stop = usbnet_stop,
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.ndo_start_xmit = usbnet_start_xmit,
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.ndo_tx_timeout = usbnet_tx_timeout,
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.ndo_change_mtu = usbnet_change_mtu,
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.ndo_get_stats64 = dev_get_tstats64,
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.ndo_set_mac_address = eth_mac_addr,
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.ndo_validate_addr = eth_validate_addr,
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};
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/* get private data associated with passed in usbnet device */
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static inline struct sierra_net_data *sierra_net_get_private(struct usbnet *dev)
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{
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return (struct sierra_net_data *)dev->data[0];
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}
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/* set private data associated with passed in usbnet device */
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static inline void sierra_net_set_private(struct usbnet *dev,
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struct sierra_net_data *priv)
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{
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dev->data[0] = (unsigned long)priv;
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}
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/* is packet IPv4/IPv6 */
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static inline int is_ip(struct sk_buff *skb)
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{
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return skb->protocol == cpu_to_be16(ETH_P_IP) ||
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skb->protocol == cpu_to_be16(ETH_P_IPV6);
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}
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/*
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* check passed in packet and make sure that:
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* - it is linear (no scatter/gather)
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* - it is ethernet (mac_header properly set)
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*/
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static int check_ethip_packet(struct sk_buff *skb, struct usbnet *dev)
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{
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skb_reset_mac_header(skb); /* ethernet header */
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if (skb_is_nonlinear(skb)) {
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netdev_err(dev->net, "Non linear buffer-dropping\n");
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return 0;
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}
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if (!pskb_may_pull(skb, ETH_HLEN))
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return 0;
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skb->protocol = eth_hdr(skb)->h_proto;
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return 1;
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}
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static const u8 *save16bit(struct param *p, const u8 *datap)
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{
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p->is_present = 1;
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p->word = get_unaligned_be16(datap);
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return datap + sizeof(p->word);
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}
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static const u8 *save8bit(struct param *p, const u8 *datap)
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{
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p->is_present = 1;
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p->byte = *datap;
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return datap + sizeof(p->byte);
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}
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/*----------------------------------------------------------------------------*
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* BEGIN HIP *
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*----------------------------------------------------------------------------*/
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/* HIP header */
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#define SIERRA_NET_HIP_HDR_LEN 4
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/* Extended HIP header */
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#define SIERRA_NET_HIP_EXT_HDR_LEN 6
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struct hip_hdr {
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int hdrlen;
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struct param payload_len;
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struct param msgid;
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struct param msgspecific;
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struct param extmsgid;
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};
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static int parse_hip(const u8 *buf, const u32 buflen, struct hip_hdr *hh)
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{
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const u8 *curp = buf;
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int padded;
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if (buflen < SIERRA_NET_HIP_HDR_LEN)
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return -EPROTO;
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curp = save16bit(&hh->payload_len, curp);
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curp = save8bit(&hh->msgid, curp);
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curp = save8bit(&hh->msgspecific, curp);
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padded = hh->msgid.byte & 0x80;
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hh->msgid.byte &= 0x7F; /* 7 bits */
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hh->extmsgid.is_present = (hh->msgid.byte == SIERRA_NET_HIP_EXTENDEDID);
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if (hh->extmsgid.is_present) {
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if (buflen < SIERRA_NET_HIP_EXT_HDR_LEN)
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return -EPROTO;
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hh->payload_len.word &= 0x3FFF; /* 14 bits */
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curp = save16bit(&hh->extmsgid, curp);
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hh->extmsgid.word &= 0x03FF; /* 10 bits */
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hh->hdrlen = SIERRA_NET_HIP_EXT_HDR_LEN;
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} else {
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hh->payload_len.word &= 0x07FF; /* 11 bits */
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hh->hdrlen = SIERRA_NET_HIP_HDR_LEN;
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}
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if (padded) {
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hh->hdrlen++;
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hh->payload_len.word--;
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}
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/* if real packet shorter than the claimed length */
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if (buflen < (hh->hdrlen + hh->payload_len.word))
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return -EINVAL;
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return 0;
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}
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static void build_hip(u8 *buf, const u16 payloadlen,
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struct sierra_net_data *priv)
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{
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/* the following doesn't have the full functionality. We
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* currently build only one kind of header, so it is faster this way
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*/
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put_unaligned_be16(payloadlen, buf);
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memcpy(buf+2, priv->tx_hdr_template, sizeof(priv->tx_hdr_template));
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}
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/*----------------------------------------------------------------------------*
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* END HIP *
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*----------------------------------------------------------------------------*/
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static int sierra_net_send_cmd(struct usbnet *dev,
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u8 *cmd, int cmdlen, const char * cmd_name)
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{
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struct sierra_net_data *priv = sierra_net_get_private(dev);
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int status;
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status = usbnet_write_cmd(dev, USB_CDC_SEND_ENCAPSULATED_COMMAND,
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USB_DIR_OUT|USB_TYPE_CLASS|USB_RECIP_INTERFACE,
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0, priv->ifnum, cmd, cmdlen);
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if (status != cmdlen && status != -ENODEV)
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netdev_err(dev->net, "Submit %s failed %d\n", cmd_name, status);
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return status;
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}
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static int sierra_net_send_sync(struct usbnet *dev)
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{
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int status;
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struct sierra_net_data *priv = sierra_net_get_private(dev);
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dev_dbg(&dev->udev->dev, "%s", __func__);
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status = sierra_net_send_cmd(dev, priv->sync_msg,
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sizeof(priv->sync_msg), "SYNC");
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return status;
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}
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static void sierra_net_set_ctx_index(struct sierra_net_data *priv, u8 ctx_ix)
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{
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dev_dbg(&(priv->usbnet->udev->dev), "%s %d", __func__, ctx_ix);
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priv->tx_hdr_template[0] = 0x3F;
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priv->tx_hdr_template[1] = ctx_ix;
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*((__be16 *)&priv->tx_hdr_template[2]) =
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cpu_to_be16(SIERRA_NET_HIP_EXT_IP_OUT_ID);
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}
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static int sierra_net_parse_lsi(struct usbnet *dev, char *data, int datalen)
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{
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struct lsi_umts *lsi = (struct lsi_umts *)data;
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u32 expected_length;
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if (datalen < sizeof(struct lsi_umts_single)) {
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netdev_err(dev->net, "%s: Data length %d, exp >= %zu\n",
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__func__, datalen, sizeof(struct lsi_umts_single));
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return -1;
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}
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/* Validate the session state */
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if (lsi->session_state == SIERRA_NET_SESSION_IDLE) {
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netdev_err(dev->net, "Session idle, 0x%02x\n",
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lsi->session_state);
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return 0;
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}
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/* Validate the protocol - only support UMTS for now */
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if (lsi->protocol == SIERRA_NET_PROTOCOL_UMTS) {
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struct lsi_umts_single *single = (struct lsi_umts_single *)lsi;
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/* Validate the link type */
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if (single->link_type != SIERRA_NET_AS_LINK_TYPE_IPV4 &&
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single->link_type != SIERRA_NET_AS_LINK_TYPE_IPV6) {
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netdev_err(dev->net, "Link type unsupported: 0x%02x\n",
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single->link_type);
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return -1;
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}
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expected_length = SIERRA_NET_LSI_UMTS_STATUS_LEN;
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} else if (lsi->protocol == SIERRA_NET_PROTOCOL_UMTS_DS) {
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expected_length = SIERRA_NET_LSI_UMTS_DS_STATUS_LEN;
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} else {
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netdev_err(dev->net, "Protocol unsupported, 0x%02x\n",
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lsi->protocol);
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return -1;
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}
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if (be16_to_cpu(lsi->length) != expected_length) {
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netdev_err(dev->net, "%s: LSI_UMTS_STATUS_LEN %d, exp %u\n",
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__func__, be16_to_cpu(lsi->length), expected_length);
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return -1;
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}
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/* Validate the coverage */
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if (lsi->coverage == SIERRA_NET_COVERAGE_NONE ||
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lsi->coverage == SIERRA_NET_COVERAGE_NOPACKET) {
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netdev_err(dev->net, "No coverage, 0x%02x\n", lsi->coverage);
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return 0;
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}
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/* Set link_sense true */
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return 1;
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}
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static void sierra_net_handle_lsi(struct usbnet *dev, char *data,
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struct hip_hdr *hh)
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{
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struct sierra_net_data *priv = sierra_net_get_private(dev);
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int link_up;
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link_up = sierra_net_parse_lsi(dev, data + hh->hdrlen,
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hh->payload_len.word);
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if (link_up < 0) {
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netdev_err(dev->net, "Invalid LSI\n");
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return;
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}
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if (link_up) {
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sierra_net_set_ctx_index(priv, hh->msgspecific.byte);
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priv->link_up = 1;
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} else {
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priv->link_up = 0;
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}
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usbnet_link_change(dev, link_up, 0);
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}
|
|
|
|
static void sierra_net_dosync(struct usbnet *dev)
|
|
{
|
|
int status;
|
|
struct sierra_net_data *priv = sierra_net_get_private(dev);
|
|
|
|
dev_dbg(&dev->udev->dev, "%s", __func__);
|
|
|
|
/* The SIERRA_NET_HIP_MSYNC_ID command appears to request that the
|
|
* firmware restart itself. After restarting, the modem will respond
|
|
* with the SIERRA_NET_HIP_RESTART_ID indication. The driver continues
|
|
* sending MSYNC commands every few seconds until it receives the
|
|
* RESTART event from the firmware
|
|
*/
|
|
|
|
/* tell modem we are ready */
|
|
status = sierra_net_send_sync(dev);
|
|
if (status < 0)
|
|
netdev_err(dev->net,
|
|
"Send SYNC failed, status %d\n", status);
|
|
status = sierra_net_send_sync(dev);
|
|
if (status < 0)
|
|
netdev_err(dev->net,
|
|
"Send SYNC failed, status %d\n", status);
|
|
|
|
/* Now, start a timer and make sure we get the Restart Indication */
|
|
priv->sync_timer.expires = jiffies + SIERRA_NET_SYNCDELAY;
|
|
add_timer(&priv->sync_timer);
|
|
}
|
|
|
|
static void sierra_net_kevent(struct work_struct *work)
|
|
{
|
|
struct sierra_net_data *priv =
|
|
container_of(work, struct sierra_net_data, sierra_net_kevent);
|
|
struct usbnet *dev = priv->usbnet;
|
|
int len;
|
|
int err;
|
|
u8 *buf;
|
|
u8 ifnum;
|
|
|
|
if (test_bit(SIERRA_NET_EVENT_RESP_AVAIL, &priv->kevent_flags)) {
|
|
clear_bit(SIERRA_NET_EVENT_RESP_AVAIL, &priv->kevent_flags);
|
|
|
|
/* Query the modem for the LSI message */
|
|
buf = kzalloc(SIERRA_NET_USBCTL_BUF_LEN, GFP_KERNEL);
|
|
if (!buf)
|
|
return;
|
|
|
|
ifnum = priv->ifnum;
|
|
len = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
|
|
USB_CDC_GET_ENCAPSULATED_RESPONSE,
|
|
USB_DIR_IN|USB_TYPE_CLASS|USB_RECIP_INTERFACE,
|
|
0, ifnum, buf, SIERRA_NET_USBCTL_BUF_LEN,
|
|
USB_CTRL_SET_TIMEOUT);
|
|
|
|
if (len < 0) {
|
|
netdev_err(dev->net,
|
|
"usb_control_msg failed, status %d\n", len);
|
|
} else {
|
|
struct hip_hdr hh;
|
|
|
|
dev_dbg(&dev->udev->dev, "%s: Received status message,"
|
|
" %04x bytes", __func__, len);
|
|
|
|
err = parse_hip(buf, len, &hh);
|
|
if (err) {
|
|
netdev_err(dev->net, "%s: Bad packet,"
|
|
" parse result %d\n", __func__, err);
|
|
kfree(buf);
|
|
return;
|
|
}
|
|
|
|
/* Validate packet length */
|
|
if (len != hh.hdrlen + hh.payload_len.word) {
|
|
netdev_err(dev->net, "%s: Bad packet, received"
|
|
" %d, expected %d\n", __func__, len,
|
|
hh.hdrlen + hh.payload_len.word);
|
|
kfree(buf);
|
|
return;
|
|
}
|
|
|
|
/* Switch on received message types */
|
|
switch (hh.msgid.byte) {
|
|
case SIERRA_NET_HIP_LSI_UMTSID:
|
|
dev_dbg(&dev->udev->dev, "LSI for ctx:%d",
|
|
hh.msgspecific.byte);
|
|
sierra_net_handle_lsi(dev, buf, &hh);
|
|
break;
|
|
case SIERRA_NET_HIP_RESTART_ID:
|
|
dev_dbg(&dev->udev->dev, "Restart reported: %d,"
|
|
" stopping sync timer",
|
|
hh.msgspecific.byte);
|
|
/* Got sync resp - stop timer & clear mask */
|
|
del_timer_sync(&priv->sync_timer);
|
|
clear_bit(SIERRA_NET_TIMER_EXPIRY,
|
|
&priv->kevent_flags);
|
|
break;
|
|
case SIERRA_NET_HIP_HSYNC_ID:
|
|
dev_dbg(&dev->udev->dev, "SYNC received");
|
|
err = sierra_net_send_sync(dev);
|
|
if (err < 0)
|
|
netdev_err(dev->net,
|
|
"Send SYNC failed %d\n", err);
|
|
break;
|
|
case SIERRA_NET_HIP_EXTENDEDID:
|
|
netdev_err(dev->net, "Unrecognized HIP msg, "
|
|
"extmsgid 0x%04x\n", hh.extmsgid.word);
|
|
break;
|
|
case SIERRA_NET_HIP_RCGI:
|
|
/* Ignored */
|
|
break;
|
|
default:
|
|
netdev_err(dev->net, "Unrecognized HIP msg, "
|
|
"msgid 0x%02x\n", hh.msgid.byte);
|
|
break;
|
|
}
|
|
}
|
|
kfree(buf);
|
|
}
|
|
/* The sync timer bit might be set */
|
|
if (test_bit(SIERRA_NET_TIMER_EXPIRY, &priv->kevent_flags)) {
|
|
clear_bit(SIERRA_NET_TIMER_EXPIRY, &priv->kevent_flags);
|
|
dev_dbg(&dev->udev->dev, "Deferred sync timer expiry");
|
|
sierra_net_dosync(priv->usbnet);
|
|
}
|
|
|
|
if (priv->kevent_flags)
|
|
dev_dbg(&dev->udev->dev, "sierra_net_kevent done, "
|
|
"kevent_flags = 0x%lx", priv->kevent_flags);
|
|
}
|
|
|
|
static void sierra_net_defer_kevent(struct usbnet *dev, int work)
|
|
{
|
|
struct sierra_net_data *priv = sierra_net_get_private(dev);
|
|
|
|
set_bit(work, &priv->kevent_flags);
|
|
schedule_work(&priv->sierra_net_kevent);
|
|
}
|
|
|
|
/*
|
|
* Sync Retransmit Timer Handler. On expiry, kick the work queue
|
|
*/
|
|
static void sierra_sync_timer(struct timer_list *t)
|
|
{
|
|
struct sierra_net_data *priv = from_timer(priv, t, sync_timer);
|
|
struct usbnet *dev = priv->usbnet;
|
|
|
|
dev_dbg(&dev->udev->dev, "%s", __func__);
|
|
/* Kick the tasklet */
|
|
sierra_net_defer_kevent(dev, SIERRA_NET_TIMER_EXPIRY);
|
|
}
|
|
|
|
static void sierra_net_status(struct usbnet *dev, struct urb *urb)
|
|
{
|
|
struct usb_cdc_notification *event;
|
|
|
|
dev_dbg(&dev->udev->dev, "%s", __func__);
|
|
|
|
if (urb->actual_length < sizeof *event)
|
|
return;
|
|
|
|
/* Add cases to handle other standard notifications. */
|
|
event = urb->transfer_buffer;
|
|
switch (event->bNotificationType) {
|
|
case USB_CDC_NOTIFY_NETWORK_CONNECTION:
|
|
case USB_CDC_NOTIFY_SPEED_CHANGE:
|
|
/* USB 305 sends those */
|
|
break;
|
|
case USB_CDC_NOTIFY_RESPONSE_AVAILABLE:
|
|
sierra_net_defer_kevent(dev, SIERRA_NET_EVENT_RESP_AVAIL);
|
|
break;
|
|
default:
|
|
netdev_err(dev->net, ": unexpected notification %02x!\n",
|
|
event->bNotificationType);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void sierra_net_get_drvinfo(struct net_device *net,
|
|
struct ethtool_drvinfo *info)
|
|
{
|
|
/* Inherit standard device info */
|
|
usbnet_get_drvinfo(net, info);
|
|
strscpy(info->driver, driver_name, sizeof(info->driver));
|
|
strscpy(info->version, DRIVER_VERSION, sizeof(info->version));
|
|
}
|
|
|
|
static u32 sierra_net_get_link(struct net_device *net)
|
|
{
|
|
struct usbnet *dev = netdev_priv(net);
|
|
/* Report link is down whenever the interface is down */
|
|
return sierra_net_get_private(dev)->link_up && netif_running(net);
|
|
}
|
|
|
|
static const struct ethtool_ops sierra_net_ethtool_ops = {
|
|
.get_drvinfo = sierra_net_get_drvinfo,
|
|
.get_link = sierra_net_get_link,
|
|
.get_msglevel = usbnet_get_msglevel,
|
|
.set_msglevel = usbnet_set_msglevel,
|
|
.nway_reset = usbnet_nway_reset,
|
|
.get_link_ksettings = usbnet_get_link_ksettings_mii,
|
|
.set_link_ksettings = usbnet_set_link_ksettings_mii,
|
|
};
|
|
|
|
static int sierra_net_get_fw_attr(struct usbnet *dev, u16 *datap)
|
|
{
|
|
int result = 0;
|
|
__le16 attrdata;
|
|
|
|
result = usbnet_read_cmd(dev,
|
|
/* _u8 vendor specific request */
|
|
SWI_USB_REQUEST_GET_FW_ATTR,
|
|
USB_DIR_IN | USB_TYPE_VENDOR, /* __u8 request type */
|
|
0x0000, /* __u16 value not used */
|
|
0x0000, /* __u16 index not used */
|
|
&attrdata, /* char *data */
|
|
sizeof(attrdata) /* __u16 size */
|
|
);
|
|
|
|
if (result < 0)
|
|
return -EIO;
|
|
|
|
*datap = le16_to_cpu(attrdata);
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* collects the bulk endpoints, the status endpoint.
|
|
*/
|
|
static int sierra_net_bind(struct usbnet *dev, struct usb_interface *intf)
|
|
{
|
|
u8 ifacenum;
|
|
u8 numendpoints;
|
|
u16 fwattr = 0;
|
|
int status;
|
|
struct sierra_net_data *priv;
|
|
static const u8 sync_tmplate[sizeof(priv->sync_msg)] = {
|
|
0x00, 0x00, SIERRA_NET_HIP_MSYNC_ID, 0x00};
|
|
static const u8 shdwn_tmplate[sizeof(priv->shdwn_msg)] = {
|
|
0x00, 0x00, SIERRA_NET_HIP_SHUTD_ID, 0x00};
|
|
u8 mod[2];
|
|
|
|
dev_dbg(&dev->udev->dev, "%s", __func__);
|
|
|
|
ifacenum = intf->cur_altsetting->desc.bInterfaceNumber;
|
|
numendpoints = intf->cur_altsetting->desc.bNumEndpoints;
|
|
/* We have three endpoints, bulk in and out, and a status */
|
|
if (numendpoints != 3) {
|
|
dev_err(&dev->udev->dev, "Expected 3 endpoints, found: %d",
|
|
numendpoints);
|
|
return -ENODEV;
|
|
}
|
|
/* Status endpoint set in usbnet_get_endpoints() */
|
|
dev->status = NULL;
|
|
status = usbnet_get_endpoints(dev, intf);
|
|
if (status < 0) {
|
|
dev_err(&dev->udev->dev, "Error in usbnet_get_endpoints (%d)",
|
|
status);
|
|
return -ENODEV;
|
|
}
|
|
/* Initialize sierra private data */
|
|
priv = kzalloc(sizeof *priv, GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
priv->usbnet = dev;
|
|
priv->ifnum = ifacenum;
|
|
dev->net->netdev_ops = &sierra_net_device_ops;
|
|
|
|
/* change MAC addr to include, ifacenum, and to be unique */
|
|
mod[0] = atomic_inc_return(&iface_counter);
|
|
mod[1] = ifacenum;
|
|
dev_addr_mod(dev->net, ETH_ALEN - 2, mod, 2);
|
|
|
|
/* prepare shutdown message template */
|
|
memcpy(priv->shdwn_msg, shdwn_tmplate, sizeof(priv->shdwn_msg));
|
|
/* set context index initially to 0 - prepares tx hdr template */
|
|
sierra_net_set_ctx_index(priv, 0);
|
|
|
|
/* prepare sync message template */
|
|
memcpy(priv->sync_msg, sync_tmplate, sizeof(priv->sync_msg));
|
|
|
|
/* decrease the rx_urb_size and max_tx_size to 4k on USB 1.1 */
|
|
dev->rx_urb_size = SIERRA_NET_RX_URB_SIZE;
|
|
if (dev->udev->speed != USB_SPEED_HIGH)
|
|
dev->rx_urb_size = min_t(size_t, 4096, SIERRA_NET_RX_URB_SIZE);
|
|
|
|
dev->net->hard_header_len += SIERRA_NET_HIP_EXT_HDR_LEN;
|
|
dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
|
|
dev->net->max_mtu = SIERRA_NET_MAX_SUPPORTED_MTU;
|
|
|
|
/* Set up the netdev */
|
|
dev->net->flags |= IFF_NOARP;
|
|
dev->net->ethtool_ops = &sierra_net_ethtool_ops;
|
|
netif_carrier_off(dev->net);
|
|
|
|
sierra_net_set_private(dev, priv);
|
|
|
|
priv->kevent_flags = 0;
|
|
|
|
/* Use the shared workqueue */
|
|
INIT_WORK(&priv->sierra_net_kevent, sierra_net_kevent);
|
|
|
|
/* Only need to do this once */
|
|
timer_setup(&priv->sync_timer, sierra_sync_timer, 0);
|
|
|
|
/* verify fw attributes */
|
|
status = sierra_net_get_fw_attr(dev, &fwattr);
|
|
dev_dbg(&dev->udev->dev, "Fw attr: %x\n", fwattr);
|
|
|
|
/* test whether firmware supports DHCP */
|
|
if (!(status == sizeof(fwattr) && (fwattr & SWI_GET_FW_ATTR_MASK))) {
|
|
/* found incompatible firmware version */
|
|
dev_err(&dev->udev->dev, "Incompatible driver and firmware"
|
|
" versions\n");
|
|
kfree(priv);
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void sierra_net_unbind(struct usbnet *dev, struct usb_interface *intf)
|
|
{
|
|
int status;
|
|
struct sierra_net_data *priv = sierra_net_get_private(dev);
|
|
|
|
dev_dbg(&dev->udev->dev, "%s", __func__);
|
|
|
|
/* kill the timer and work */
|
|
timer_shutdown_sync(&priv->sync_timer);
|
|
cancel_work_sync(&priv->sierra_net_kevent);
|
|
|
|
/* tell modem we are going away */
|
|
status = sierra_net_send_cmd(dev, priv->shdwn_msg,
|
|
sizeof(priv->shdwn_msg), "Shutdown");
|
|
if (status < 0)
|
|
netdev_err(dev->net,
|
|
"usb_control_msg failed, status %d\n", status);
|
|
|
|
usbnet_status_stop(dev);
|
|
|
|
sierra_net_set_private(dev, NULL);
|
|
kfree(priv);
|
|
}
|
|
|
|
static struct sk_buff *sierra_net_skb_clone(struct usbnet *dev,
|
|
struct sk_buff *skb, int len)
|
|
{
|
|
struct sk_buff *new_skb;
|
|
|
|
/* clone skb */
|
|
new_skb = skb_clone(skb, GFP_ATOMIC);
|
|
|
|
/* remove len bytes from original */
|
|
skb_pull(skb, len);
|
|
|
|
/* trim next packet to it's length */
|
|
if (new_skb) {
|
|
skb_trim(new_skb, len);
|
|
} else {
|
|
if (netif_msg_rx_err(dev))
|
|
netdev_err(dev->net, "failed to get skb\n");
|
|
dev->net->stats.rx_dropped++;
|
|
}
|
|
|
|
return new_skb;
|
|
}
|
|
|
|
/* ---------------------------- Receive data path ----------------------*/
|
|
static int sierra_net_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
|
|
{
|
|
int err;
|
|
struct hip_hdr hh;
|
|
struct sk_buff *new_skb;
|
|
|
|
dev_dbg(&dev->udev->dev, "%s", __func__);
|
|
|
|
/* could contain multiple packets */
|
|
while (likely(skb->len)) {
|
|
err = parse_hip(skb->data, skb->len, &hh);
|
|
if (err) {
|
|
if (netif_msg_rx_err(dev))
|
|
netdev_err(dev->net, "Invalid HIP header %d\n",
|
|
err);
|
|
/* dev->net->stats.rx_errors incremented by caller */
|
|
dev->net->stats.rx_length_errors++;
|
|
return 0;
|
|
}
|
|
|
|
/* Validate Extended HIP header */
|
|
if (!hh.extmsgid.is_present
|
|
|| hh.extmsgid.word != SIERRA_NET_HIP_EXT_IP_IN_ID) {
|
|
if (netif_msg_rx_err(dev))
|
|
netdev_err(dev->net, "HIP/ETH: Invalid pkt\n");
|
|
|
|
dev->net->stats.rx_frame_errors++;
|
|
/* dev->net->stats.rx_errors incremented by caller */
|
|
return 0;
|
|
}
|
|
|
|
skb_pull(skb, hh.hdrlen);
|
|
|
|
/* We are going to accept this packet, prepare it.
|
|
* In case protocol is IPv6, keep it, otherwise force IPv4.
|
|
*/
|
|
skb_reset_mac_header(skb);
|
|
if (eth_hdr(skb)->h_proto != cpu_to_be16(ETH_P_IPV6))
|
|
eth_hdr(skb)->h_proto = cpu_to_be16(ETH_P_IP);
|
|
eth_zero_addr(eth_hdr(skb)->h_source);
|
|
memcpy(eth_hdr(skb)->h_dest, dev->net->dev_addr, ETH_ALEN);
|
|
|
|
/* Last packet in batch handled by usbnet */
|
|
if (hh.payload_len.word == skb->len)
|
|
return 1;
|
|
|
|
new_skb = sierra_net_skb_clone(dev, skb, hh.payload_len.word);
|
|
if (new_skb)
|
|
usbnet_skb_return(dev, new_skb);
|
|
|
|
} /* while */
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* ---------------------------- Transmit data path ----------------------*/
|
|
static struct sk_buff *sierra_net_tx_fixup(struct usbnet *dev,
|
|
struct sk_buff *skb, gfp_t flags)
|
|
{
|
|
struct sierra_net_data *priv = sierra_net_get_private(dev);
|
|
u16 len;
|
|
bool need_tail;
|
|
|
|
BUILD_BUG_ON(sizeof_field(struct usbnet, data)
|
|
< sizeof(struct cdc_state));
|
|
|
|
dev_dbg(&dev->udev->dev, "%s", __func__);
|
|
if (priv->link_up && check_ethip_packet(skb, dev) && is_ip(skb)) {
|
|
/* enough head room as is? */
|
|
if (SIERRA_NET_HIP_EXT_HDR_LEN <= skb_headroom(skb)) {
|
|
/* Save the Eth/IP length and set up HIP hdr */
|
|
len = skb->len;
|
|
skb_push(skb, SIERRA_NET_HIP_EXT_HDR_LEN);
|
|
/* Handle ZLP issue */
|
|
need_tail = ((len + SIERRA_NET_HIP_EXT_HDR_LEN)
|
|
% dev->maxpacket == 0);
|
|
if (need_tail) {
|
|
if (unlikely(skb_tailroom(skb) == 0)) {
|
|
netdev_err(dev->net, "tx_fixup:"
|
|
"no room for packet\n");
|
|
dev_kfree_skb_any(skb);
|
|
return NULL;
|
|
} else {
|
|
skb->data[skb->len] = 0;
|
|
__skb_put(skb, 1);
|
|
len = len + 1;
|
|
}
|
|
}
|
|
build_hip(skb->data, len, priv);
|
|
return skb;
|
|
} else {
|
|
/*
|
|
* compensate in the future if necessary
|
|
*/
|
|
netdev_err(dev->net, "tx_fixup: no room for HIP\n");
|
|
} /* headroom */
|
|
}
|
|
|
|
if (!priv->link_up)
|
|
dev->net->stats.tx_carrier_errors++;
|
|
|
|
/* tx_dropped incremented by usbnet */
|
|
|
|
/* filter the packet out, release it */
|
|
dev_kfree_skb_any(skb);
|
|
return NULL;
|
|
}
|
|
|
|
static const struct driver_info sierra_net_info_direct_ip = {
|
|
.description = "Sierra Wireless USB-to-WWAN Modem",
|
|
.flags = FLAG_WWAN | FLAG_SEND_ZLP,
|
|
.bind = sierra_net_bind,
|
|
.unbind = sierra_net_unbind,
|
|
.status = sierra_net_status,
|
|
.rx_fixup = sierra_net_rx_fixup,
|
|
.tx_fixup = sierra_net_tx_fixup,
|
|
};
|
|
|
|
static int
|
|
sierra_net_probe(struct usb_interface *udev, const struct usb_device_id *prod)
|
|
{
|
|
int ret;
|
|
|
|
ret = usbnet_probe(udev, prod);
|
|
if (ret == 0) {
|
|
struct usbnet *dev = usb_get_intfdata(udev);
|
|
|
|
ret = usbnet_status_start(dev, GFP_KERNEL);
|
|
if (ret == 0) {
|
|
/* Interrupt URB now set up; initiate sync sequence */
|
|
sierra_net_dosync(dev);
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
#define DIRECT_IP_DEVICE(vend, prod) \
|
|
{USB_DEVICE_INTERFACE_NUMBER(vend, prod, 7), \
|
|
.driver_info = (unsigned long)&sierra_net_info_direct_ip}, \
|
|
{USB_DEVICE_INTERFACE_NUMBER(vend, prod, 10), \
|
|
.driver_info = (unsigned long)&sierra_net_info_direct_ip}, \
|
|
{USB_DEVICE_INTERFACE_NUMBER(vend, prod, 11), \
|
|
.driver_info = (unsigned long)&sierra_net_info_direct_ip}
|
|
|
|
static const struct usb_device_id products[] = {
|
|
DIRECT_IP_DEVICE(0x1199, 0x68A3), /* Sierra Wireless USB-to-WWAN modem */
|
|
DIRECT_IP_DEVICE(0x0F3D, 0x68A3), /* AT&T Direct IP modem */
|
|
DIRECT_IP_DEVICE(0x1199, 0x68AA), /* Sierra Wireless Direct IP LTE modem */
|
|
DIRECT_IP_DEVICE(0x0F3D, 0x68AA), /* AT&T Direct IP LTE modem */
|
|
|
|
{}, /* last item */
|
|
};
|
|
MODULE_DEVICE_TABLE(usb, products);
|
|
|
|
/* We are based on usbnet, so let it handle the USB driver specifics */
|
|
static struct usb_driver sierra_net_driver = {
|
|
.name = "sierra_net",
|
|
.id_table = products,
|
|
.probe = sierra_net_probe,
|
|
.disconnect = usbnet_disconnect,
|
|
.suspend = usbnet_suspend,
|
|
.resume = usbnet_resume,
|
|
.no_dynamic_id = 1,
|
|
.disable_hub_initiated_lpm = 1,
|
|
};
|
|
|
|
module_usb_driver(sierra_net_driver);
|
|
|
|
MODULE_AUTHOR(DRIVER_AUTHOR);
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_VERSION(DRIVER_VERSION);
|
|
MODULE_LICENSE("GPL");
|