^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * usbatm.c - Generic USB xDSL driver core
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2001, Alcatel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2003, Duncan Sands, SolNegro, Josep Comas
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 2004, David Woodhouse, Roman Kagan
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) ******************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Written by Johan Verrept, Duncan Sands (duncan.sands@free.fr) and David Woodhouse
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * 1.7+: - See the check-in logs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * 1.6: - No longer opens a connection if the firmware is not loaded
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * - Added support for the speedtouch 330
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * - Removed the limit on the number of devices
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * - Module now autoloads on device plugin
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * - Merged relevant parts of sarlib
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * - Replaced the kernel thread with a tasklet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * - New packet transmission code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * - Changed proc file contents
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * - Fixed all known SMP races
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * - Many fixes and cleanups
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * - Various fixes by Oliver Neukum (oliver@neukum.name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * 1.5A: - Version for inclusion in 2.5 series kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * - Modifications by Richard Purdie (rpurdie@rpsys.net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * - made compatible with kernel 2.5.6 onwards by changing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * usbatm_usb_send_data_context->urb to a pointer and adding code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * to alloc and free it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * - remove_wait_queue() added to usbatm_atm_processqueue_thread()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * 1.5: - fixed memory leak when atmsar_decode_aal5 returned NULL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * (reported by stephen.robinson@zen.co.uk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * 1.4: - changed the spin_lock() under interrupt to spin_lock_irqsave()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * - unlink all active send urbs of a vcc that is being closed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * 1.3.1: - added the version number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * 1.3: - Added multiple send urb support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * - fixed memory leak and vcc->tx_inuse starvation bug
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * when not enough memory left in vcc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * 1.2: - Fixed race condition in usbatm_usb_send_data()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * 1.1: - Turned off packet debugging
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #include "usbatm.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #include <linux/crc32.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #include <linux/moduleparam.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #include <linux/proc_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #include <linux/sched/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #include <linux/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #include <linux/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #include <linux/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #include <linux/wait.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) #include <linux/kthread.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #include <linux/ratelimit.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) #ifdef VERBOSE_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) static int usbatm_print_packet(struct usbatm_data *instance, const unsigned char *data, int len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) #define PACKETDEBUG(arg...) usbatm_print_packet(arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) #define vdbg(arg...) dev_dbg(arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) #define PACKETDEBUG(arg...)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) #define vdbg(arg...)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) #define DRIVER_AUTHOR "Johan Verrept, Duncan Sands <duncan.sands@free.fr>"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) #define DRIVER_DESC "Generic USB ATM/DSL I/O"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) static const char usbatm_driver_name[] = "usbatm";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) #define UDSL_MAX_RCV_URBS 16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) #define UDSL_MAX_SND_URBS 16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) #define UDSL_MAX_BUF_SIZE 65536
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) #define UDSL_DEFAULT_RCV_URBS 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) #define UDSL_DEFAULT_SND_URBS 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) #define UDSL_DEFAULT_RCV_BUF_SIZE 3392 /* 64 * ATM_CELL_SIZE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) #define UDSL_DEFAULT_SND_BUF_SIZE 3392 /* 64 * ATM_CELL_SIZE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) #define ATM_CELL_HEADER (ATM_CELL_SIZE - ATM_CELL_PAYLOAD)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) #define THROTTLE_MSECS 100 /* delay to recover processing after urb submission fails */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static unsigned int num_rcv_urbs = UDSL_DEFAULT_RCV_URBS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) static unsigned int num_snd_urbs = UDSL_DEFAULT_SND_URBS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static unsigned int rcv_buf_bytes = UDSL_DEFAULT_RCV_BUF_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static unsigned int snd_buf_bytes = UDSL_DEFAULT_SND_BUF_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) module_param(num_rcv_urbs, uint, S_IRUGO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) MODULE_PARM_DESC(num_rcv_urbs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) "Number of urbs used for reception (range: 0-"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) __MODULE_STRING(UDSL_MAX_RCV_URBS) ", default: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) __MODULE_STRING(UDSL_DEFAULT_RCV_URBS) ")");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) module_param(num_snd_urbs, uint, S_IRUGO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) MODULE_PARM_DESC(num_snd_urbs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) "Number of urbs used for transmission (range: 0-"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) __MODULE_STRING(UDSL_MAX_SND_URBS) ", default: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) __MODULE_STRING(UDSL_DEFAULT_SND_URBS) ")");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) module_param(rcv_buf_bytes, uint, S_IRUGO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) MODULE_PARM_DESC(rcv_buf_bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) "Size of the buffers used for reception, in bytes (range: 1-"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) __MODULE_STRING(UDSL_MAX_BUF_SIZE) ", default: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) __MODULE_STRING(UDSL_DEFAULT_RCV_BUF_SIZE) ")");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) module_param(snd_buf_bytes, uint, S_IRUGO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) MODULE_PARM_DESC(snd_buf_bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) "Size of the buffers used for transmission, in bytes (range: 1-"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) __MODULE_STRING(UDSL_MAX_BUF_SIZE) ", default: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) __MODULE_STRING(UDSL_DEFAULT_SND_BUF_SIZE) ")");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) /* receive */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) struct usbatm_vcc_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) /* vpi/vci lookup */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) short vpi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) int vci;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) struct atm_vcc *vcc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) /* raw cell reassembly */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) struct sk_buff *sarb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) /* send */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) struct usbatm_control {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) struct atm_skb_data atm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) u32 len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) u32 crc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) #define UDSL_SKB(x) ((struct usbatm_control *)(x)->cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) /* ATM */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) static void usbatm_atm_dev_close(struct atm_dev *atm_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) static int usbatm_atm_open(struct atm_vcc *vcc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) static void usbatm_atm_close(struct atm_vcc *vcc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) static int usbatm_atm_ioctl(struct atm_dev *atm_dev, unsigned int cmd, void __user *arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) static int usbatm_atm_send(struct atm_vcc *vcc, struct sk_buff *skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) static int usbatm_atm_proc_read(struct atm_dev *atm_dev, loff_t *pos, char *page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) static const struct atmdev_ops usbatm_atm_devops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) .dev_close = usbatm_atm_dev_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) .open = usbatm_atm_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) .close = usbatm_atm_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) .ioctl = usbatm_atm_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) .send = usbatm_atm_send,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) .proc_read = usbatm_atm_proc_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) /***********
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) ** misc **
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) ***********/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) static inline unsigned int usbatm_pdu_length(unsigned int length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) length += ATM_CELL_PAYLOAD - 1 + ATM_AAL5_TRAILER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) return length - length % ATM_CELL_PAYLOAD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) static inline void usbatm_pop(struct atm_vcc *vcc, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) if (vcc->pop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) vcc->pop(vcc, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) dev_kfree_skb_any(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) /***********
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) ** urbs **
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) ************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) static struct urb *usbatm_pop_urb(struct usbatm_channel *channel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) struct urb *urb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) spin_lock_irq(&channel->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) if (list_empty(&channel->list)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) spin_unlock_irq(&channel->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) urb = list_entry(channel->list.next, struct urb, urb_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) list_del(&urb->urb_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) spin_unlock_irq(&channel->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) return urb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) static int usbatm_submit_urb(struct urb *urb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) struct usbatm_channel *channel = urb->context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) /* vdbg("%s: submitting urb 0x%p, size %u",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) __func__, urb, urb->transfer_buffer_length); */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) ret = usb_submit_urb(urb, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (printk_ratelimit())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) atm_warn(channel->usbatm, "%s: urb 0x%p submission failed (%d)!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) __func__, urb, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) /* consider all errors transient and return the buffer back to the queue */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) urb->status = -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) spin_lock_irq(&channel->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) /* must add to the front when sending; doesn't matter when receiving */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) list_add(&urb->urb_list, &channel->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) spin_unlock_irq(&channel->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) /* make sure the channel doesn't stall */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) mod_timer(&channel->delay, jiffies + msecs_to_jiffies(THROTTLE_MSECS));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) static void usbatm_complete(struct urb *urb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) struct usbatm_channel *channel = urb->context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) int status = urb->status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) /* vdbg("%s: urb 0x%p, status %d, actual_length %d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) __func__, urb, status, urb->actual_length); */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) /* usually in_interrupt(), but not always */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) spin_lock_irqsave(&channel->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) /* must add to the back when receiving; doesn't matter when sending */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) list_add_tail(&urb->urb_list, &channel->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) spin_unlock_irqrestore(&channel->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) if (unlikely(status) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) (!(channel->usbatm->flags & UDSL_IGNORE_EILSEQ) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) status != -EILSEQ)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) if (status == -ESHUTDOWN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) if (printk_ratelimit())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) atm_warn(channel->usbatm, "%s: urb 0x%p failed (%d)!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) __func__, urb, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) /* throttle processing in case of an error */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) mod_timer(&channel->delay, jiffies + msecs_to_jiffies(THROTTLE_MSECS));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) tasklet_schedule(&channel->tasklet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) /*************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) ** decode **
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) *************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) static inline struct usbatm_vcc_data *usbatm_find_vcc(struct usbatm_data *instance,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) short vpi, int vci)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) struct usbatm_vcc_data *vcc_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) list_for_each_entry(vcc_data, &instance->vcc_list, list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) if ((vcc_data->vci == vci) && (vcc_data->vpi == vpi))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) return vcc_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) static void usbatm_extract_one_cell(struct usbatm_data *instance, unsigned char *source)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) struct atm_vcc *vcc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) struct sk_buff *sarb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) short vpi = ((source[0] & 0x0f) << 4) | (source[1] >> 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) int vci = ((source[1] & 0x0f) << 12) | (source[2] << 4) | (source[3] >> 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) u8 pti = ((source[3] & 0xe) >> 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) if ((vci != instance->cached_vci) || (vpi != instance->cached_vpi)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) instance->cached_vpi = vpi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) instance->cached_vci = vci;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) instance->cached_vcc = usbatm_find_vcc(instance, vpi, vci);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) if (!instance->cached_vcc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) atm_rldbg(instance, "%s: unknown vpi/vci (%hd/%d)!\n", __func__, vpi, vci);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) if (!instance->cached_vcc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) vcc = instance->cached_vcc->vcc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) /* OAM F5 end-to-end */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) if (pti == ATM_PTI_E2EF5) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) if (printk_ratelimit())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) atm_warn(instance, "%s: OAM not supported (vpi %d, vci %d)!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) __func__, vpi, vci);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) atomic_inc(&vcc->stats->rx_err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) sarb = instance->cached_vcc->sarb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) if (sarb->tail + ATM_CELL_PAYLOAD > sarb->end) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) atm_rldbg(instance, "%s: buffer overrun (sarb->len %u, vcc: 0x%p)!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) __func__, sarb->len, vcc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) /* discard cells already received */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) skb_trim(sarb, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) memcpy(skb_tail_pointer(sarb), source + ATM_CELL_HEADER, ATM_CELL_PAYLOAD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) __skb_put(sarb, ATM_CELL_PAYLOAD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (pti & 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) unsigned int length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) unsigned int pdu_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) length = (source[ATM_CELL_SIZE - 6] << 8) + source[ATM_CELL_SIZE - 5];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) /* guard against overflow */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) if (length > ATM_MAX_AAL5_PDU) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) atm_rldbg(instance, "%s: bogus length %u (vcc: 0x%p)!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) __func__, length, vcc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) atomic_inc(&vcc->stats->rx_err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) pdu_length = usbatm_pdu_length(length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) if (sarb->len < pdu_length) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) atm_rldbg(instance, "%s: bogus pdu_length %u (sarb->len: %u, vcc: 0x%p)!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) __func__, pdu_length, sarb->len, vcc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) atomic_inc(&vcc->stats->rx_err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) if (crc32_be(~0, skb_tail_pointer(sarb) - pdu_length, pdu_length) != 0xc704dd7b) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) atm_rldbg(instance, "%s: packet failed crc check (vcc: 0x%p)!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) __func__, vcc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) atomic_inc(&vcc->stats->rx_err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) goto out;
^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) vdbg(&instance->usb_intf->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) "%s: got packet (length: %u, pdu_length: %u, vcc: 0x%p)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) __func__, length, pdu_length, vcc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) skb = dev_alloc_skb(length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) if (!skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) if (printk_ratelimit())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) atm_err(instance, "%s: no memory for skb (length: %u)!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) __func__, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) atomic_inc(&vcc->stats->rx_drop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) vdbg(&instance->usb_intf->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) "%s: allocated new sk_buff (skb: 0x%p, skb->truesize: %u)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) __func__, skb, skb->truesize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) if (!atm_charge(vcc, skb->truesize)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) atm_rldbg(instance, "%s: failed atm_charge (skb->truesize: %u)!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) __func__, skb->truesize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) dev_kfree_skb_any(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) goto out; /* atm_charge increments rx_drop */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) skb_copy_to_linear_data(skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) skb_tail_pointer(sarb) - pdu_length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) __skb_put(skb, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) vdbg(&instance->usb_intf->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) "%s: sending skb 0x%p, skb->len %u, skb->truesize %u",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) __func__, skb, skb->len, skb->truesize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) PACKETDEBUG(instance, skb->data, skb->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) vcc->push(vcc, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) atomic_inc(&vcc->stats->rx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) skb_trim(sarb, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) static void usbatm_extract_cells(struct usbatm_data *instance,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) unsigned char *source, unsigned int avail_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) unsigned int stride = instance->rx_channel.stride;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) unsigned int buf_usage = instance->buf_usage;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) /* extract cells from incoming data, taking into account that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) * the length of avail data may not be a multiple of stride */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) if (buf_usage > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) /* we have a partially received atm cell */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) unsigned char *cell_buf = instance->cell_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) unsigned int space_left = stride - buf_usage;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) if (avail_data >= space_left) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) /* add new data and process cell */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) memcpy(cell_buf + buf_usage, source, space_left);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) source += space_left;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) avail_data -= space_left;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) usbatm_extract_one_cell(instance, cell_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) instance->buf_usage = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) /* not enough data to fill the cell */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) memcpy(cell_buf + buf_usage, source, avail_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) instance->buf_usage = buf_usage + avail_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) for (; avail_data >= stride; avail_data -= stride, source += stride)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) usbatm_extract_one_cell(instance, source);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) if (avail_data > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) /* length was not a multiple of stride -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) * save remaining data for next call */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) memcpy(instance->cell_buf, source, avail_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) instance->buf_usage = avail_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) /*************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) ** encode **
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) *************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) static unsigned int usbatm_write_cells(struct usbatm_data *instance,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) u8 *target, unsigned int avail_space)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) struct usbatm_control *ctrl = UDSL_SKB(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) struct atm_vcc *vcc = ctrl->atm.vcc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) unsigned int bytes_written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) unsigned int stride = instance->tx_channel.stride;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) for (bytes_written = 0; bytes_written < avail_space && ctrl->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) bytes_written += stride, target += stride) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) unsigned int data_len = min_t(unsigned int, skb->len, ATM_CELL_PAYLOAD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) unsigned int left = ATM_CELL_PAYLOAD - data_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) u8 *ptr = target;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) ptr[0] = vcc->vpi >> 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) ptr[1] = (vcc->vpi << 4) | (vcc->vci >> 12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) ptr[2] = vcc->vci >> 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) ptr[3] = vcc->vci << 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) ptr[4] = 0xec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) ptr += ATM_CELL_HEADER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) skb_copy_from_linear_data(skb, ptr, data_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) ptr += data_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) __skb_pull(skb, data_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) if (!left)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) memset(ptr, 0, left);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) if (left >= ATM_AAL5_TRAILER) { /* trailer will go in this cell */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) u8 *trailer = target + ATM_CELL_SIZE - ATM_AAL5_TRAILER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) /* trailer[0] = 0; UU = 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) /* trailer[1] = 0; CPI = 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) trailer[2] = ctrl->len >> 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) trailer[3] = ctrl->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) ctrl->crc = ~crc32_be(ctrl->crc, ptr, left - 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) trailer[4] = ctrl->crc >> 24;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) trailer[5] = ctrl->crc >> 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) trailer[6] = ctrl->crc >> 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) trailer[7] = ctrl->crc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) target[3] |= 0x2; /* adjust PTI */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) ctrl->len = 0; /* tag this skb finished */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) ctrl->crc = crc32_be(ctrl->crc, ptr, left);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) return bytes_written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) /**************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) ** receive **
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) **************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) static void usbatm_rx_process(struct tasklet_struct *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) struct usbatm_data *instance = from_tasklet(instance, t,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) rx_channel.tasklet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) struct urb *urb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) while ((urb = usbatm_pop_urb(&instance->rx_channel))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) vdbg(&instance->usb_intf->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) "%s: processing urb 0x%p", __func__, urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) if (usb_pipeisoc(urb->pipe)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) unsigned char *merge_start = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) unsigned int merge_length = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) const unsigned int packet_size = instance->rx_channel.packet_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) for (i = 0; i < urb->number_of_packets; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) if (!urb->iso_frame_desc[i].status) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) unsigned int actual_length = urb->iso_frame_desc[i].actual_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) if (!merge_length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) merge_start = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) merge_length += actual_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) if (merge_length && (actual_length < packet_size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) usbatm_extract_cells(instance, merge_start, merge_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) merge_length = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) atm_rldbg(instance, "%s: status %d in frame %d!\n", __func__, urb->status, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) if (merge_length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) usbatm_extract_cells(instance, merge_start, merge_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) merge_length = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) instance->buf_usage = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) if (merge_length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) usbatm_extract_cells(instance, merge_start, merge_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) if (!urb->status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) usbatm_extract_cells(instance, urb->transfer_buffer, urb->actual_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) instance->buf_usage = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) if (usbatm_submit_urb(urb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) /***********
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) ** send **
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) ***********/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) static void usbatm_tx_process(struct tasklet_struct *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) struct usbatm_data *instance = from_tasklet(instance, t,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) tx_channel.tasklet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) struct sk_buff *skb = instance->current_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) struct urb *urb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) const unsigned int buf_size = instance->tx_channel.buf_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) unsigned int bytes_written = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) u8 *buffer = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) skb = skb_dequeue(&instance->sndqueue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) while (skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) if (!urb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) urb = usbatm_pop_urb(&instance->tx_channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) if (!urb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) break; /* no more senders */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) buffer = urb->transfer_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) bytes_written = (urb->status == -EAGAIN) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) urb->transfer_buffer_length : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) bytes_written += usbatm_write_cells(instance, skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) buffer + bytes_written,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) buf_size - bytes_written);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) vdbg(&instance->usb_intf->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) "%s: wrote %u bytes from skb 0x%p to urb 0x%p",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) __func__, bytes_written, skb, urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) if (!UDSL_SKB(skb)->len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) struct atm_vcc *vcc = UDSL_SKB(skb)->atm.vcc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) usbatm_pop(vcc, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) atomic_inc(&vcc->stats->tx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) skb = skb_dequeue(&instance->sndqueue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) if (bytes_written == buf_size || (!skb && bytes_written)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) urb->transfer_buffer_length = bytes_written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) if (usbatm_submit_urb(urb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) urb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) instance->current_skb = skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) static void usbatm_cancel_send(struct usbatm_data *instance,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) struct atm_vcc *vcc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) struct sk_buff *skb, *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) spin_lock_irq(&instance->sndqueue.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) skb_queue_walk_safe(&instance->sndqueue, skb, n) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) if (UDSL_SKB(skb)->atm.vcc == vcc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) atm_dbg(instance, "%s: popping skb 0x%p\n", __func__, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) __skb_unlink(skb, &instance->sndqueue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) usbatm_pop(vcc, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) spin_unlock_irq(&instance->sndqueue.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) tasklet_disable(&instance->tx_channel.tasklet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) if ((skb = instance->current_skb) && (UDSL_SKB(skb)->atm.vcc == vcc)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) atm_dbg(instance, "%s: popping current skb (0x%p)\n", __func__, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) instance->current_skb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) usbatm_pop(vcc, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) tasklet_enable(&instance->tx_channel.tasklet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) static int usbatm_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) struct usbatm_data *instance = vcc->dev->dev_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) struct usbatm_control *ctrl = UDSL_SKB(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) /* racy disconnection check - fine */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) if (!instance || instance->disconnected) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) #ifdef VERBOSE_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) printk_ratelimited(KERN_DEBUG "%s: %s!\n", __func__, instance ? "disconnected" : "NULL instance");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) err = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) if (vcc->qos.aal != ATM_AAL5) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) atm_rldbg(instance, "%s: unsupported ATM type %d!\n", __func__, vcc->qos.aal);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) if (skb->len > ATM_MAX_AAL5_PDU) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) atm_rldbg(instance, "%s: packet too long (%d vs %d)!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) __func__, skb->len, ATM_MAX_AAL5_PDU);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) PACKETDEBUG(instance, skb->data, skb->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) /* initialize the control block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) ctrl->atm.vcc = vcc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) ctrl->len = skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) ctrl->crc = crc32_be(~0, skb->data, skb->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) skb_queue_tail(&instance->sndqueue, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) tasklet_schedule(&instance->tx_channel.tasklet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) usbatm_pop(vcc, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) /********************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) ** bean counting **
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) ********************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) static void usbatm_destroy_instance(struct kref *kref)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) struct usbatm_data *instance = container_of(kref, struct usbatm_data, refcount);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) tasklet_kill(&instance->rx_channel.tasklet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) tasklet_kill(&instance->tx_channel.tasklet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) usb_put_dev(instance->usb_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) kfree(instance);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) static void usbatm_get_instance(struct usbatm_data *instance)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) kref_get(&instance->refcount);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) static void usbatm_put_instance(struct usbatm_data *instance)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) kref_put(&instance->refcount, usbatm_destroy_instance);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) /**********
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) ** ATM **
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) **********/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) static void usbatm_atm_dev_close(struct atm_dev *atm_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) struct usbatm_data *instance = atm_dev->dev_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) if (!instance)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) atm_dev->dev_data = NULL; /* catch bugs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) usbatm_put_instance(instance); /* taken in usbatm_atm_init */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) static int usbatm_atm_proc_read(struct atm_dev *atm_dev, loff_t *pos, char *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) struct usbatm_data *instance = atm_dev->dev_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) int left = *pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) if (!instance)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) if (!left--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) return sprintf(page, "%s\n", instance->description);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) if (!left--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) return sprintf(page, "MAC: %pM\n", atm_dev->esi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) if (!left--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) return sprintf(page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) "AAL5: tx %d ( %d err ), rx %d ( %d err, %d drop )\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) atomic_read(&atm_dev->stats.aal5.tx),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) atomic_read(&atm_dev->stats.aal5.tx_err),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) atomic_read(&atm_dev->stats.aal5.rx),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) atomic_read(&atm_dev->stats.aal5.rx_err),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) atomic_read(&atm_dev->stats.aal5.rx_drop));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) if (!left--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) if (instance->disconnected)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) return sprintf(page, "Disconnected\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) switch (atm_dev->signal) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) case ATM_PHY_SIG_FOUND:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) return sprintf(page, "Line up\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) case ATM_PHY_SIG_LOST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) return sprintf(page, "Line down\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) return sprintf(page, "Line state unknown\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) static int usbatm_atm_open(struct atm_vcc *vcc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) struct usbatm_data *instance = vcc->dev->dev_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) struct usbatm_vcc_data *new = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) int vci = vcc->vci;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) short vpi = vcc->vpi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) if (!instance)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) /* only support AAL5 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) if ((vcc->qos.aal != ATM_AAL5)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) atm_warn(instance, "%s: unsupported ATM type %d!\n", __func__, vcc->qos.aal);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) /* sanity checks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) if ((vcc->qos.rxtp.max_sdu < 0) || (vcc->qos.rxtp.max_sdu > ATM_MAX_AAL5_PDU)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) atm_dbg(instance, "%s: max_sdu %d out of range!\n", __func__, vcc->qos.rxtp.max_sdu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) mutex_lock(&instance->serialize); /* vs self, usbatm_atm_close, usbatm_usb_disconnect */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) if (instance->disconnected) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) atm_dbg(instance, "%s: disconnected!\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) ret = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) if (usbatm_find_vcc(instance, vpi, vci)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) atm_dbg(instance, "%s: %hd/%d already in use!\n", __func__, vpi, vci);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) ret = -EADDRINUSE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) new = kzalloc(sizeof(struct usbatm_vcc_data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) if (!new) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) new->vcc = vcc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) new->vpi = vpi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) new->vci = vci;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) new->sarb = alloc_skb(usbatm_pdu_length(vcc->qos.rxtp.max_sdu), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) if (!new->sarb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) atm_err(instance, "%s: no memory for SAR buffer!\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) goto fail;
^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) vcc->dev_data = new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) tasklet_disable(&instance->rx_channel.tasklet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) instance->cached_vcc = new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) instance->cached_vpi = vpi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) instance->cached_vci = vci;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) list_add(&new->list, &instance->vcc_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) tasklet_enable(&instance->rx_channel.tasklet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) set_bit(ATM_VF_ADDR, &vcc->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) set_bit(ATM_VF_PARTIAL, &vcc->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) set_bit(ATM_VF_READY, &vcc->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) mutex_unlock(&instance->serialize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) atm_dbg(instance, "%s: allocated vcc data 0x%p\n", __func__, new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) kfree(new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) mutex_unlock(&instance->serialize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) static void usbatm_atm_close(struct atm_vcc *vcc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) struct usbatm_data *instance = vcc->dev->dev_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) struct usbatm_vcc_data *vcc_data = vcc->dev_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) if (!instance || !vcc_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) usbatm_cancel_send(instance, vcc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) mutex_lock(&instance->serialize); /* vs self, usbatm_atm_open, usbatm_usb_disconnect */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) tasklet_disable(&instance->rx_channel.tasklet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) if (instance->cached_vcc == vcc_data) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) instance->cached_vcc = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) instance->cached_vpi = ATM_VPI_UNSPEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) instance->cached_vci = ATM_VCI_UNSPEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) list_del(&vcc_data->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) tasklet_enable(&instance->rx_channel.tasklet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) kfree_skb(vcc_data->sarb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) vcc_data->sarb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) kfree(vcc_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) vcc->dev_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) vcc->vpi = ATM_VPI_UNSPEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) vcc->vci = ATM_VCI_UNSPEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) clear_bit(ATM_VF_READY, &vcc->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) clear_bit(ATM_VF_PARTIAL, &vcc->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) clear_bit(ATM_VF_ADDR, &vcc->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) mutex_unlock(&instance->serialize);
^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) static int usbatm_atm_ioctl(struct atm_dev *atm_dev, unsigned int cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) void __user *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) struct usbatm_data *instance = atm_dev->dev_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) if (!instance || instance->disconnected)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) case ATM_QUERYLOOP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) return put_user(ATM_LM_NONE, (int __user *)arg) ? -EFAULT : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) return -ENOIOCTLCMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) static int usbatm_atm_init(struct usbatm_data *instance)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) struct atm_dev *atm_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) int ret, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) /* ATM init. The ATM initialization scheme suffers from an intrinsic race
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) * condition: callbacks we register can be executed at once, before we have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) * initialized the struct atm_dev. To protect against this, all callbacks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) * abort if atm_dev->dev_data is NULL. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) atm_dev = atm_dev_register(instance->driver_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) &instance->usb_intf->dev, &usbatm_atm_devops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) -1, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) if (!atm_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) usb_err(instance, "%s: failed to register ATM device!\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) instance->atm_dev = atm_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) atm_dev->ci_range.vpi_bits = ATM_CI_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) atm_dev->ci_range.vci_bits = ATM_CI_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) atm_dev->signal = ATM_PHY_SIG_UNKNOWN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) /* temp init ATM device, set to 128kbit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) atm_dev->link_rate = 128 * 1000 / 424;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) if (instance->driver->atm_start && ((ret = instance->driver->atm_start(instance, atm_dev)) < 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) atm_err(instance, "%s: atm_start failed: %d!\n", __func__, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) usbatm_get_instance(instance); /* dropped in usbatm_atm_dev_close */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) /* ready for ATM callbacks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) mb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) atm_dev->dev_data = instance;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) /* submit all rx URBs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) for (i = 0; i < num_rcv_urbs; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) usbatm_submit_urb(instance->urbs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) instance->atm_dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) atm_dev_deregister(atm_dev); /* usbatm_atm_dev_close will eventually be called */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) /**********
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) ** USB **
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) **********/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) static int usbatm_do_heavy_init(void *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) struct usbatm_data *instance = arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) allow_signal(SIGTERM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) complete(&instance->thread_started);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) ret = instance->driver->heavy_init(instance, instance->usb_intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) ret = usbatm_atm_init(instance);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) mutex_lock(&instance->serialize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) instance->thread = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) mutex_unlock(&instance->serialize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) complete_and_exit(&instance->thread_exited, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) static int usbatm_heavy_init(struct usbatm_data *instance)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) struct task_struct *t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) t = kthread_create(usbatm_do_heavy_init, instance, "%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) instance->driver->driver_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) if (IS_ERR(t)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) usb_err(instance, "%s: failed to create kernel_thread (%ld)!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) __func__, PTR_ERR(t));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) return PTR_ERR(t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) instance->thread = t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) wake_up_process(t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) wait_for_completion(&instance->thread_started);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) static void usbatm_tasklet_schedule(struct timer_list *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) struct usbatm_channel *channel = from_timer(channel, t, delay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) tasklet_schedule(&channel->tasklet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) static void usbatm_init_channel(struct usbatm_channel *channel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) spin_lock_init(&channel->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) INIT_LIST_HEAD(&channel->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) timer_setup(&channel->delay, usbatm_tasklet_schedule, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) int usbatm_usb_probe(struct usb_interface *intf, const struct usb_device_id *id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) struct usbatm_driver *driver)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) struct device *dev = &intf->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) struct usb_device *usb_dev = interface_to_usbdev(intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) struct usbatm_data *instance;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) char *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) int error = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) int i, length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) unsigned int maxpacket, num_packets;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) /* instance init */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) instance = kzalloc(sizeof(*instance) + sizeof(struct urb *) * (num_rcv_urbs + num_snd_urbs), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) if (!instance)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) /* public fields */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) instance->driver = driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) strlcpy(instance->driver_name, driver->driver_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) sizeof(instance->driver_name));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) instance->usb_dev = usb_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) instance->usb_intf = intf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) buf = instance->description;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) length = sizeof(instance->description);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) if ((i = usb_string(usb_dev, usb_dev->descriptor.iProduct, buf, length)) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) goto bind;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) buf += i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) length -= i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) i = scnprintf(buf, length, " (");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) buf += i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) length -= i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) if (length <= 0 || (i = usb_make_path(usb_dev, buf, length)) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) goto bind;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) buf += i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) length -= i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) snprintf(buf, length, ")");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) bind:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) if (driver->bind && (error = driver->bind(instance, intf, id)) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) dev_err(dev, "%s: bind failed: %d!\n", __func__, error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) goto fail_free;
^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) /* private fields */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) kref_init(&instance->refcount); /* dropped in usbatm_usb_disconnect */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) mutex_init(&instance->serialize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) instance->thread = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) init_completion(&instance->thread_started);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) init_completion(&instance->thread_exited);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) INIT_LIST_HEAD(&instance->vcc_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) skb_queue_head_init(&instance->sndqueue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) usbatm_init_channel(&instance->rx_channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) usbatm_init_channel(&instance->tx_channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) tasklet_setup(&instance->rx_channel.tasklet, usbatm_rx_process);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) tasklet_setup(&instance->tx_channel.tasklet, usbatm_tx_process);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) instance->rx_channel.stride = ATM_CELL_SIZE + driver->rx_padding;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) instance->tx_channel.stride = ATM_CELL_SIZE + driver->tx_padding;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) instance->rx_channel.usbatm = instance->tx_channel.usbatm = instance;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) if ((instance->flags & UDSL_USE_ISOC) && driver->isoc_in)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) instance->rx_channel.endpoint = usb_rcvisocpipe(usb_dev, driver->isoc_in);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) instance->rx_channel.endpoint = usb_rcvbulkpipe(usb_dev, driver->bulk_in);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) instance->tx_channel.endpoint = usb_sndbulkpipe(usb_dev, driver->bulk_out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) /* tx buffer size must be a positive multiple of the stride */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) instance->tx_channel.buf_size = max(instance->tx_channel.stride,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) snd_buf_bytes - (snd_buf_bytes % instance->tx_channel.stride));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) /* rx buffer size must be a positive multiple of the endpoint maxpacket */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) maxpacket = usb_maxpacket(usb_dev, instance->rx_channel.endpoint, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) if ((maxpacket < 1) || (maxpacket > UDSL_MAX_BUF_SIZE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) dev_err(dev, "%s: invalid endpoint %02x!\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) usb_pipeendpoint(instance->rx_channel.endpoint));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) error = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) goto fail_unbind;
^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) num_packets = max(1U, (rcv_buf_bytes + maxpacket / 2) / maxpacket); /* round */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) if (num_packets * maxpacket > UDSL_MAX_BUF_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) num_packets--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) instance->rx_channel.buf_size = num_packets * maxpacket;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) instance->rx_channel.packet_size = maxpacket;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) for (i = 0; i < 2; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) struct usbatm_channel *channel = i ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) &instance->tx_channel : &instance->rx_channel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) dev_dbg(dev, "%s: using %d byte buffer for %s channel 0x%p\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) __func__, channel->buf_size, i ? "tx" : "rx", channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) /* initialize urbs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) for (i = 0; i < num_rcv_urbs + num_snd_urbs; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) u8 *buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) struct usbatm_channel *channel = i < num_rcv_urbs ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) &instance->rx_channel : &instance->tx_channel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) struct urb *urb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) unsigned int iso_packets = usb_pipeisoc(channel->endpoint) ? channel->buf_size / channel->packet_size : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) urb = usb_alloc_urb(iso_packets, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) if (!urb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) error = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) goto fail_unbind;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) instance->urbs[i] = urb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) /* zero the tx padding to avoid leaking information */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) buffer = kzalloc(channel->buf_size, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) if (!buffer) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) error = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) goto fail_unbind;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) usb_fill_bulk_urb(urb, instance->usb_dev, channel->endpoint,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) buffer, channel->buf_size, usbatm_complete, channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) if (iso_packets) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) int j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) urb->interval = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) urb->transfer_flags = URB_ISO_ASAP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) urb->number_of_packets = iso_packets;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) for (j = 0; j < iso_packets; j++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) urb->iso_frame_desc[j].offset = channel->packet_size * j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) urb->iso_frame_desc[j].length = channel->packet_size;
^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) /* put all tx URBs on the list of spares */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) if (i >= num_rcv_urbs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) list_add_tail(&urb->urb_list, &channel->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) vdbg(&intf->dev, "%s: alloced buffer 0x%p buf size %u urb 0x%p",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) __func__, urb->transfer_buffer, urb->transfer_buffer_length, urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) instance->cached_vpi = ATM_VPI_UNSPEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) instance->cached_vci = ATM_VCI_UNSPEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) instance->cell_buf = kmalloc(instance->rx_channel.stride, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) if (!instance->cell_buf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) error = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) goto fail_unbind;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) if (!(instance->flags & UDSL_SKIP_HEAVY_INIT) && driver->heavy_init) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) error = usbatm_heavy_init(instance);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) complete(&instance->thread_exited); /* pretend that heavy_init was run */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) error = usbatm_atm_init(instance);
^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) if (error < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) goto fail_unbind;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) usb_get_dev(usb_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) usb_set_intfdata(intf, instance);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) fail_unbind:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) if (instance->driver->unbind)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) instance->driver->unbind(instance, intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) fail_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) kfree(instance->cell_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) for (i = 0; i < num_rcv_urbs + num_snd_urbs; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) if (instance->urbs[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) kfree(instance->urbs[i]->transfer_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) usb_free_urb(instance->urbs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) kfree(instance);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) EXPORT_SYMBOL_GPL(usbatm_usb_probe);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) void usbatm_usb_disconnect(struct usb_interface *intf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) struct device *dev = &intf->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) struct usbatm_data *instance = usb_get_intfdata(intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) struct usbatm_vcc_data *vcc_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) if (!instance) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) dev_dbg(dev, "%s: NULL instance!\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) return;
^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) usb_set_intfdata(intf, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) mutex_lock(&instance->serialize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) instance->disconnected = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) if (instance->thread != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) send_sig(SIGTERM, instance->thread, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) mutex_unlock(&instance->serialize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) wait_for_completion(&instance->thread_exited);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) mutex_lock(&instance->serialize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) list_for_each_entry(vcc_data, &instance->vcc_list, list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) vcc_release_async(vcc_data->vcc, -EPIPE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) mutex_unlock(&instance->serialize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) tasklet_disable(&instance->rx_channel.tasklet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) tasklet_disable(&instance->tx_channel.tasklet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) for (i = 0; i < num_rcv_urbs + num_snd_urbs; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) usb_kill_urb(instance->urbs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) del_timer_sync(&instance->rx_channel.delay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) del_timer_sync(&instance->tx_channel.delay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) /* turn usbatm_[rt]x_process into something close to a no-op */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) /* no need to take the spinlock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) INIT_LIST_HEAD(&instance->rx_channel.list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) INIT_LIST_HEAD(&instance->tx_channel.list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) tasklet_enable(&instance->rx_channel.tasklet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) tasklet_enable(&instance->tx_channel.tasklet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) if (instance->atm_dev && instance->driver->atm_stop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) instance->driver->atm_stop(instance, instance->atm_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) if (instance->driver->unbind)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) instance->driver->unbind(instance, intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) instance->driver_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) for (i = 0; i < num_rcv_urbs + num_snd_urbs; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) kfree(instance->urbs[i]->transfer_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) usb_free_urb(instance->urbs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) kfree(instance->cell_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) /* ATM finalize */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) if (instance->atm_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) atm_dev_deregister(instance->atm_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) instance->atm_dev = NULL;
^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) usbatm_put_instance(instance); /* taken in usbatm_usb_probe */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) EXPORT_SYMBOL_GPL(usbatm_usb_disconnect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) /***********
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) ** init **
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) ***********/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) static int __init usbatm_usb_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) if (sizeof(struct usbatm_control) > sizeof_field(struct sk_buff, cb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) printk(KERN_ERR "%s unusable with this kernel!\n", usbatm_driver_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) if ((num_rcv_urbs > UDSL_MAX_RCV_URBS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) || (num_snd_urbs > UDSL_MAX_SND_URBS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) || (rcv_buf_bytes < 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) || (rcv_buf_bytes > UDSL_MAX_BUF_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) || (snd_buf_bytes < 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) || (snd_buf_bytes > UDSL_MAX_BUF_SIZE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) module_init(usbatm_usb_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) static void __exit usbatm_usb_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) module_exit(usbatm_usb_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) MODULE_AUTHOR(DRIVER_AUTHOR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) MODULE_DESCRIPTION(DRIVER_DESC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) /************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) ** debug **
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) ************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) #ifdef VERBOSE_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) static int usbatm_print_packet(struct usbatm_data *instance,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) const unsigned char *data, int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) unsigned char buffer[256];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) int i = 0, j = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) for (i = 0; i < len;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) buffer[0] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) sprintf(buffer, "%.3d :", i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) for (j = 0; (j < 16) && (i < len); j++, i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) sprintf(buffer, "%s %2.2x", buffer, data[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) dev_dbg(&instance->usb_intf->dev, "%s", buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) return i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) #endif
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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