Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * usbatm.c - Generic USB xDSL driver core |
| 3 | * |
| 4 | * Copyright (C) 2001, Alcatel |
| 5 | * Copyright (C) 2003, Duncan Sands, SolNegro, Josep Comas |
| 6 | * Copyright (C) 2004, David Woodhouse, Roman Kagan |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License as published by the Free |
| 10 | * Software Foundation; either version 2 of the License, or (at your option) |
| 11 | * any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 14 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 15 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 16 | * more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License along with |
| 19 | * this program; if not, write to the Free Software Foundation, Inc., 59 |
| 20 | * Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 21 | * |
| 22 | ******************************************************************************/ |
| 23 | |
| 24 | /* |
| 25 | * Written by Johan Verrept, Duncan Sands (duncan.sands@free.fr) and David Woodhouse |
| 26 | * |
| 27 | * 1.7+: - See the check-in logs |
| 28 | * |
| 29 | * 1.6: - No longer opens a connection if the firmware is not loaded |
| 30 | * - Added support for the speedtouch 330 |
| 31 | * - Removed the limit on the number of devices |
| 32 | * - Module now autoloads on device plugin |
| 33 | * - Merged relevant parts of sarlib |
| 34 | * - Replaced the kernel thread with a tasklet |
| 35 | * - New packet transmission code |
| 36 | * - Changed proc file contents |
| 37 | * - Fixed all known SMP races |
| 38 | * - Many fixes and cleanups |
| 39 | * - Various fixes by Oliver Neukum (oliver@neukum.name) |
| 40 | * |
| 41 | * 1.5A: - Version for inclusion in 2.5 series kernel |
| 42 | * - Modifications by Richard Purdie (rpurdie@rpsys.net) |
| 43 | * - made compatible with kernel 2.5.6 onwards by changing |
| 44 | * usbatm_usb_send_data_context->urb to a pointer and adding code |
| 45 | * to alloc and free it |
| 46 | * - remove_wait_queue() added to usbatm_atm_processqueue_thread() |
| 47 | * |
| 48 | * 1.5: - fixed memory leak when atmsar_decode_aal5 returned NULL. |
| 49 | * (reported by stephen.robinson@zen.co.uk) |
| 50 | * |
| 51 | * 1.4: - changed the spin_lock() under interrupt to spin_lock_irqsave() |
| 52 | * - unlink all active send urbs of a vcc that is being closed. |
| 53 | * |
| 54 | * 1.3.1: - added the version number |
| 55 | * |
| 56 | * 1.3: - Added multiple send urb support |
| 57 | * - fixed memory leak and vcc->tx_inuse starvation bug |
| 58 | * when not enough memory left in vcc. |
| 59 | * |
| 60 | * 1.2: - Fixed race condition in usbatm_usb_send_data() |
| 61 | * 1.1: - Turned off packet debugging |
| 62 | * |
| 63 | */ |
| 64 | |
| 65 | #include "usbatm.h" |
| 66 | |
| 67 | #include <asm/uaccess.h> |
| 68 | #include <linux/crc32.h> |
| 69 | #include <linux/errno.h> |
| 70 | #include <linux/init.h> |
| 71 | #include <linux/interrupt.h> |
| 72 | #include <linux/kernel.h> |
| 73 | #include <linux/module.h> |
| 74 | #include <linux/moduleparam.h> |
Duncan Sands | 227d776 | 2006-01-13 10:13:19 +0100 | [diff] [blame] | 75 | #include <linux/netdevice.h> |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 76 | #include <linux/proc_fs.h> |
| 77 | #include <linux/sched.h> |
| 78 | #include <linux/signal.h> |
| 79 | #include <linux/slab.h> |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 80 | #include <linux/stat.h> |
| 81 | #include <linux/timer.h> |
| 82 | #include <linux/wait.h> |
Pavel Emelyanov | c4504a7 | 2008-02-11 15:26:09 +0300 | [diff] [blame] | 83 | #include <linux/kthread.h> |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 84 | |
| 85 | #ifdef VERBOSE_DEBUG |
| 86 | static int usbatm_print_packet(const unsigned char *data, int len); |
Nicolas Kaiser | 9196cc7 | 2010-06-09 20:43:03 +0200 | [diff] [blame^] | 87 | #define PACKETDEBUG(arg...) usbatm_print_packet(arg) |
| 88 | #define vdbg(arg...) dbg(arg) |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 89 | #else |
| 90 | #define PACKETDEBUG(arg...) |
| 91 | #define vdbg(arg...) |
| 92 | #endif |
| 93 | |
| 94 | #define DRIVER_AUTHOR "Johan Verrept, Duncan Sands <duncan.sands@free.fr>" |
Duncan Sands | 9b0e54a | 2006-01-13 11:08:05 +0100 | [diff] [blame] | 95 | #define DRIVER_VERSION "1.10" |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 96 | #define DRIVER_DESC "Generic USB ATM/DSL I/O, version " DRIVER_VERSION |
| 97 | |
| 98 | static const char usbatm_driver_name[] = "usbatm"; |
| 99 | |
| 100 | #define UDSL_MAX_RCV_URBS 16 |
| 101 | #define UDSL_MAX_SND_URBS 16 |
Duncan Sands | 6275cdf | 2006-04-28 18:52:16 +0200 | [diff] [blame] | 102 | #define UDSL_MAX_BUF_SIZE 65536 |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 103 | #define UDSL_DEFAULT_RCV_URBS 4 |
| 104 | #define UDSL_DEFAULT_SND_URBS 4 |
Duncan Sands | 6275cdf | 2006-04-28 18:52:16 +0200 | [diff] [blame] | 105 | #define UDSL_DEFAULT_RCV_BUF_SIZE 3392 /* 64 * ATM_CELL_SIZE */ |
| 106 | #define UDSL_DEFAULT_SND_BUF_SIZE 3392 /* 64 * ATM_CELL_SIZE */ |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 107 | |
| 108 | #define ATM_CELL_HEADER (ATM_CELL_SIZE - ATM_CELL_PAYLOAD) |
| 109 | |
| 110 | #define THROTTLE_MSECS 100 /* delay to recover processing after urb submission fails */ |
| 111 | |
| 112 | static unsigned int num_rcv_urbs = UDSL_DEFAULT_RCV_URBS; |
| 113 | static unsigned int num_snd_urbs = UDSL_DEFAULT_SND_URBS; |
Duncan Sands | 6f74947 | 2006-01-13 10:52:38 +0100 | [diff] [blame] | 114 | static unsigned int rcv_buf_bytes = UDSL_DEFAULT_RCV_BUF_SIZE; |
| 115 | static unsigned int snd_buf_bytes = UDSL_DEFAULT_SND_BUF_SIZE; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 116 | |
| 117 | module_param(num_rcv_urbs, uint, S_IRUGO); |
| 118 | MODULE_PARM_DESC(num_rcv_urbs, |
| 119 | "Number of urbs used for reception (range: 0-" |
| 120 | __MODULE_STRING(UDSL_MAX_RCV_URBS) ", default: " |
| 121 | __MODULE_STRING(UDSL_DEFAULT_RCV_URBS) ")"); |
| 122 | |
| 123 | module_param(num_snd_urbs, uint, S_IRUGO); |
| 124 | MODULE_PARM_DESC(num_snd_urbs, |
| 125 | "Number of urbs used for transmission (range: 0-" |
| 126 | __MODULE_STRING(UDSL_MAX_SND_URBS) ", default: " |
| 127 | __MODULE_STRING(UDSL_DEFAULT_SND_URBS) ")"); |
| 128 | |
Duncan Sands | 6f74947 | 2006-01-13 10:52:38 +0100 | [diff] [blame] | 129 | module_param(rcv_buf_bytes, uint, S_IRUGO); |
| 130 | MODULE_PARM_DESC(rcv_buf_bytes, |
| 131 | "Size of the buffers used for reception, in bytes (range: 1-" |
| 132 | __MODULE_STRING(UDSL_MAX_BUF_SIZE) ", default: " |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 133 | __MODULE_STRING(UDSL_DEFAULT_RCV_BUF_SIZE) ")"); |
| 134 | |
Duncan Sands | 6f74947 | 2006-01-13 10:52:38 +0100 | [diff] [blame] | 135 | module_param(snd_buf_bytes, uint, S_IRUGO); |
| 136 | MODULE_PARM_DESC(snd_buf_bytes, |
| 137 | "Size of the buffers used for transmission, in bytes (range: 1-" |
Duncan Sands | 6275cdf | 2006-04-28 18:52:16 +0200 | [diff] [blame] | 138 | __MODULE_STRING(UDSL_MAX_BUF_SIZE) ", default: " |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 139 | __MODULE_STRING(UDSL_DEFAULT_SND_BUF_SIZE) ")"); |
| 140 | |
| 141 | |
| 142 | /* receive */ |
| 143 | |
| 144 | struct usbatm_vcc_data { |
| 145 | /* vpi/vci lookup */ |
| 146 | struct list_head list; |
| 147 | short vpi; |
| 148 | int vci; |
| 149 | struct atm_vcc *vcc; |
| 150 | |
| 151 | /* raw cell reassembly */ |
| 152 | struct sk_buff *sarb; |
| 153 | }; |
| 154 | |
| 155 | |
| 156 | /* send */ |
| 157 | |
| 158 | struct usbatm_control { |
| 159 | struct atm_skb_data atm; |
| 160 | u32 len; |
| 161 | u32 crc; |
| 162 | }; |
| 163 | |
| 164 | #define UDSL_SKB(x) ((struct usbatm_control *)(x)->cb) |
| 165 | |
| 166 | |
| 167 | /* ATM */ |
| 168 | |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 169 | static void usbatm_atm_dev_close(struct atm_dev *atm_dev); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 170 | static int usbatm_atm_open(struct atm_vcc *vcc); |
| 171 | static void usbatm_atm_close(struct atm_vcc *vcc); |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 172 | static int usbatm_atm_ioctl(struct atm_dev *atm_dev, unsigned int cmd, void __user * arg); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 173 | static int usbatm_atm_send(struct atm_vcc *vcc, struct sk_buff *skb); |
| 174 | static int usbatm_atm_proc_read(struct atm_dev *atm_dev, loff_t * pos, char *page); |
| 175 | |
| 176 | static struct atmdev_ops usbatm_atm_devops = { |
| 177 | .dev_close = usbatm_atm_dev_close, |
| 178 | .open = usbatm_atm_open, |
| 179 | .close = usbatm_atm_close, |
| 180 | .ioctl = usbatm_atm_ioctl, |
| 181 | .send = usbatm_atm_send, |
| 182 | .proc_read = usbatm_atm_proc_read, |
| 183 | .owner = THIS_MODULE, |
| 184 | }; |
| 185 | |
| 186 | |
| 187 | /*********** |
| 188 | ** misc ** |
| 189 | ***********/ |
| 190 | |
| 191 | static inline unsigned int usbatm_pdu_length(unsigned int length) |
| 192 | { |
| 193 | length += ATM_CELL_PAYLOAD - 1 + ATM_AAL5_TRAILER; |
| 194 | return length - length % ATM_CELL_PAYLOAD; |
| 195 | } |
| 196 | |
| 197 | static inline void usbatm_pop(struct atm_vcc *vcc, struct sk_buff *skb) |
| 198 | { |
| 199 | if (vcc->pop) |
| 200 | vcc->pop(vcc, skb); |
| 201 | else |
Duncan Sands | 227d776 | 2006-01-13 10:13:19 +0100 | [diff] [blame] | 202 | dev_kfree_skb_any(skb); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 203 | } |
| 204 | |
| 205 | |
| 206 | /*********** |
| 207 | ** urbs ** |
| 208 | ************/ |
| 209 | |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 210 | static struct urb *usbatm_pop_urb(struct usbatm_channel *channel) |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 211 | { |
| 212 | struct urb *urb; |
| 213 | |
| 214 | spin_lock_irq(&channel->lock); |
| 215 | if (list_empty(&channel->list)) { |
| 216 | spin_unlock_irq(&channel->lock); |
| 217 | return NULL; |
| 218 | } |
| 219 | |
| 220 | urb = list_entry(channel->list.next, struct urb, urb_list); |
| 221 | list_del(&urb->urb_list); |
| 222 | spin_unlock_irq(&channel->lock); |
| 223 | |
| 224 | return urb; |
| 225 | } |
| 226 | |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 227 | static int usbatm_submit_urb(struct urb *urb) |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 228 | { |
| 229 | struct usbatm_channel *channel = urb->context; |
| 230 | int ret; |
| 231 | |
| 232 | vdbg("%s: submitting urb 0x%p, size %u", |
| 233 | __func__, urb, urb->transfer_buffer_length); |
| 234 | |
| 235 | ret = usb_submit_urb(urb, GFP_ATOMIC); |
| 236 | if (ret) { |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 237 | if (printk_ratelimit()) |
| 238 | atm_warn(channel->usbatm, "%s: urb 0x%p submission failed (%d)!\n", |
| 239 | __func__, urb, ret); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 240 | |
| 241 | /* consider all errors transient and return the buffer back to the queue */ |
| 242 | urb->status = -EAGAIN; |
| 243 | spin_lock_irq(&channel->lock); |
| 244 | |
| 245 | /* must add to the front when sending; doesn't matter when receiving */ |
| 246 | list_add(&urb->urb_list, &channel->list); |
| 247 | |
| 248 | spin_unlock_irq(&channel->lock); |
| 249 | |
| 250 | /* make sure the channel doesn't stall */ |
| 251 | mod_timer(&channel->delay, jiffies + msecs_to_jiffies(THROTTLE_MSECS)); |
| 252 | } |
| 253 | |
| 254 | return ret; |
| 255 | } |
| 256 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 257 | static void usbatm_complete(struct urb *urb) |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 258 | { |
| 259 | struct usbatm_channel *channel = urb->context; |
| 260 | unsigned long flags; |
Greg Kroah-Hartman | 33fea2b | 2007-07-18 10:58:02 -0700 | [diff] [blame] | 261 | int status = urb->status; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 262 | |
| 263 | vdbg("%s: urb 0x%p, status %d, actual_length %d", |
Greg Kroah-Hartman | 33fea2b | 2007-07-18 10:58:02 -0700 | [diff] [blame] | 264 | __func__, urb, status, urb->actual_length); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 265 | |
| 266 | /* usually in_interrupt(), but not always */ |
| 267 | spin_lock_irqsave(&channel->lock, flags); |
| 268 | |
| 269 | /* must add to the back when receiving; doesn't matter when sending */ |
| 270 | list_add_tail(&urb->urb_list, &channel->list); |
| 271 | |
| 272 | spin_unlock_irqrestore(&channel->lock, flags); |
| 273 | |
Greg Kroah-Hartman | 33fea2b | 2007-07-18 10:58:02 -0700 | [diff] [blame] | 274 | if (unlikely(status) && |
Duncan Sands | a3673d3 | 2006-01-13 11:12:58 +0100 | [diff] [blame] | 275 | (!(channel->usbatm->flags & UDSL_IGNORE_EILSEQ) || |
Nicolas Kaiser | 9196cc7 | 2010-06-09 20:43:03 +0200 | [diff] [blame^] | 276 | status != -EILSEQ)) { |
Greg Kroah-Hartman | 33fea2b | 2007-07-18 10:58:02 -0700 | [diff] [blame] | 277 | if (status == -ESHUTDOWN) |
Simon Arlott | 7d5e1dd | 2007-04-26 00:38:04 -0700 | [diff] [blame] | 278 | return; |
| 279 | |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 280 | if (printk_ratelimit()) |
| 281 | atm_warn(channel->usbatm, "%s: urb 0x%p failed (%d)!\n", |
Greg Kroah-Hartman | 33fea2b | 2007-07-18 10:58:02 -0700 | [diff] [blame] | 282 | __func__, urb, status); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 283 | /* throttle processing in case of an error */ |
| 284 | mod_timer(&channel->delay, jiffies + msecs_to_jiffies(THROTTLE_MSECS)); |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 285 | } else |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 286 | tasklet_schedule(&channel->tasklet); |
| 287 | } |
| 288 | |
| 289 | |
| 290 | /************* |
| 291 | ** decode ** |
| 292 | *************/ |
| 293 | |
| 294 | static inline struct usbatm_vcc_data *usbatm_find_vcc(struct usbatm_data *instance, |
| 295 | short vpi, int vci) |
| 296 | { |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 297 | struct usbatm_vcc_data *vcc_data; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 298 | |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 299 | list_for_each_entry(vcc_data, &instance->vcc_list, list) |
| 300 | if ((vcc_data->vci == vci) && (vcc_data->vpi == vpi)) |
| 301 | return vcc_data; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 302 | return NULL; |
| 303 | } |
| 304 | |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 305 | static void usbatm_extract_one_cell(struct usbatm_data *instance, unsigned char *source) |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 306 | { |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 307 | struct atm_vcc *vcc; |
| 308 | struct sk_buff *sarb; |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 309 | short vpi = ((source[0] & 0x0f) << 4) | (source[1] >> 4); |
| 310 | int vci = ((source[1] & 0x0f) << 12) | (source[2] << 4) | (source[3] >> 4); |
| 311 | u8 pti = ((source[3] & 0xe) >> 1); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 312 | |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 313 | vdbg("%s: vpi %hd, vci %d, pti %d", __func__, vpi, vci, pti); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 314 | |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 315 | if ((vci != instance->cached_vci) || (vpi != instance->cached_vpi)) { |
| 316 | instance->cached_vpi = vpi; |
| 317 | instance->cached_vci = vci; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 318 | |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 319 | instance->cached_vcc = usbatm_find_vcc(instance, vpi, vci); |
Duncan Sands | e20d664 | 2005-05-26 14:32:51 +0200 | [diff] [blame] | 320 | |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 321 | if (!instance->cached_vcc) |
| 322 | atm_rldbg(instance, "%s: unknown vpi/vci (%hd/%d)!\n", __func__, vpi, vci); |
| 323 | } |
Duncan Sands | e20d664 | 2005-05-26 14:32:51 +0200 | [diff] [blame] | 324 | |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 325 | if (!instance->cached_vcc) |
| 326 | return; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 327 | |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 328 | vcc = instance->cached_vcc->vcc; |
Duncan Sands | e20d664 | 2005-05-26 14:32:51 +0200 | [diff] [blame] | 329 | |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 330 | /* OAM F5 end-to-end */ |
| 331 | if (pti == ATM_PTI_E2EF5) { |
| 332 | if (printk_ratelimit()) |
| 333 | atm_warn(instance, "%s: OAM not supported (vpi %d, vci %d)!\n", |
| 334 | __func__, vpi, vci); |
| 335 | atomic_inc(&vcc->stats->rx_err); |
| 336 | return; |
| 337 | } |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 338 | |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 339 | sarb = instance->cached_vcc->sarb; |
| 340 | |
Arnaldo Carvalho de Melo | 4305b54 | 2007-04-19 20:43:29 -0700 | [diff] [blame] | 341 | if (sarb->tail + ATM_CELL_PAYLOAD > sarb->end) { |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 342 | atm_rldbg(instance, "%s: buffer overrun (sarb->len %u, vcc: 0x%p)!\n", |
| 343 | __func__, sarb->len, vcc); |
| 344 | /* discard cells already received */ |
| 345 | skb_trim(sarb, 0); |
Greg Kroah-Hartman | 3b6004f | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 346 | UDSL_ASSERT(instance, sarb->tail + ATM_CELL_PAYLOAD <= sarb->end); |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 347 | } |
| 348 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 349 | memcpy(skb_tail_pointer(sarb), source + ATM_CELL_HEADER, ATM_CELL_PAYLOAD); |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 350 | __skb_put(sarb, ATM_CELL_PAYLOAD); |
| 351 | |
| 352 | if (pti & 1) { |
| 353 | struct sk_buff *skb; |
| 354 | unsigned int length; |
| 355 | unsigned int pdu_length; |
| 356 | |
| 357 | length = (source[ATM_CELL_SIZE - 6] << 8) + source[ATM_CELL_SIZE - 5]; |
| 358 | |
| 359 | /* guard against overflow */ |
| 360 | if (length > ATM_MAX_AAL5_PDU) { |
| 361 | atm_rldbg(instance, "%s: bogus length %u (vcc: 0x%p)!\n", |
| 362 | __func__, length, vcc); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 363 | atomic_inc(&vcc->stats->rx_err); |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 364 | goto out; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 365 | } |
| 366 | |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 367 | pdu_length = usbatm_pdu_length(length); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 368 | |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 369 | if (sarb->len < pdu_length) { |
| 370 | atm_rldbg(instance, "%s: bogus pdu_length %u (sarb->len: %u, vcc: 0x%p)!\n", |
| 371 | __func__, pdu_length, sarb->len, vcc); |
| 372 | atomic_inc(&vcc->stats->rx_err); |
| 373 | goto out; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 374 | } |
| 375 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 376 | if (crc32_be(~0, skb_tail_pointer(sarb) - pdu_length, pdu_length) != 0xc704dd7b) { |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 377 | atm_rldbg(instance, "%s: packet failed crc check (vcc: 0x%p)!\n", |
| 378 | __func__, vcc); |
| 379 | atomic_inc(&vcc->stats->rx_err); |
| 380 | goto out; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 381 | } |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 382 | |
| 383 | vdbg("%s: got packet (length: %u, pdu_length: %u, vcc: 0x%p)", __func__, length, pdu_length, vcc); |
| 384 | |
| 385 | if (!(skb = dev_alloc_skb(length))) { |
| 386 | if (printk_ratelimit()) |
| 387 | atm_err(instance, "%s: no memory for skb (length: %u)!\n", |
| 388 | __func__, length); |
| 389 | atomic_inc(&vcc->stats->rx_drop); |
| 390 | goto out; |
| 391 | } |
| 392 | |
| 393 | vdbg("%s: allocated new sk_buff (skb: 0x%p, skb->truesize: %u)", __func__, skb, skb->truesize); |
| 394 | |
| 395 | if (!atm_charge(vcc, skb->truesize)) { |
| 396 | atm_rldbg(instance, "%s: failed atm_charge (skb->truesize: %u)!\n", |
| 397 | __func__, skb->truesize); |
| 398 | dev_kfree_skb_any(skb); |
| 399 | goto out; /* atm_charge increments rx_drop */ |
| 400 | } |
| 401 | |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 402 | skb_copy_to_linear_data(skb, |
| 403 | skb_tail_pointer(sarb) - pdu_length, |
| 404 | length); |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 405 | __skb_put(skb, length); |
| 406 | |
| 407 | vdbg("%s: sending skb 0x%p, skb->len %u, skb->truesize %u", |
| 408 | __func__, skb, skb->len, skb->truesize); |
| 409 | |
| 410 | PACKETDEBUG(skb->data, skb->len); |
| 411 | |
| 412 | vcc->push(vcc, skb); |
| 413 | |
| 414 | atomic_inc(&vcc->stats->rx); |
| 415 | out: |
| 416 | skb_trim(sarb, 0); |
| 417 | } |
| 418 | } |
| 419 | |
| 420 | static void usbatm_extract_cells(struct usbatm_data *instance, |
| 421 | unsigned char *source, unsigned int avail_data) |
| 422 | { |
| 423 | unsigned int stride = instance->rx_channel.stride; |
| 424 | unsigned int buf_usage = instance->buf_usage; |
| 425 | |
| 426 | /* extract cells from incoming data, taking into account that |
| 427 | * the length of avail data may not be a multiple of stride */ |
| 428 | |
| 429 | if (buf_usage > 0) { |
| 430 | /* we have a partially received atm cell */ |
| 431 | unsigned char *cell_buf = instance->cell_buf; |
| 432 | unsigned int space_left = stride - buf_usage; |
| 433 | |
Greg Kroah-Hartman | 3b6004f | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 434 | UDSL_ASSERT(instance, buf_usage <= stride); |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 435 | |
| 436 | if (avail_data >= space_left) { |
| 437 | /* add new data and process cell */ |
| 438 | memcpy(cell_buf + buf_usage, source, space_left); |
| 439 | source += space_left; |
| 440 | avail_data -= space_left; |
| 441 | usbatm_extract_one_cell(instance, cell_buf); |
| 442 | instance->buf_usage = 0; |
| 443 | } else { |
| 444 | /* not enough data to fill the cell */ |
| 445 | memcpy(cell_buf + buf_usage, source, avail_data); |
| 446 | instance->buf_usage = buf_usage + avail_data; |
| 447 | return; |
| 448 | } |
| 449 | } |
| 450 | |
| 451 | for (; avail_data >= stride; avail_data -= stride, source += stride) |
| 452 | usbatm_extract_one_cell(instance, source); |
| 453 | |
| 454 | if (avail_data > 0) { |
| 455 | /* length was not a multiple of stride - |
| 456 | * save remaining data for next call */ |
| 457 | memcpy(instance->cell_buf, source, avail_data); |
| 458 | instance->buf_usage = avail_data; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 459 | } |
| 460 | } |
| 461 | |
| 462 | |
| 463 | /************* |
| 464 | ** encode ** |
| 465 | *************/ |
| 466 | |
| 467 | static unsigned int usbatm_write_cells(struct usbatm_data *instance, |
| 468 | struct sk_buff *skb, |
| 469 | u8 *target, unsigned int avail_space) |
| 470 | { |
| 471 | struct usbatm_control *ctrl = UDSL_SKB(skb); |
| 472 | struct atm_vcc *vcc = ctrl->atm.vcc; |
Duncan Sands | 6f74947 | 2006-01-13 10:52:38 +0100 | [diff] [blame] | 473 | unsigned int bytes_written; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 474 | unsigned int stride = instance->tx_channel.stride; |
| 475 | |
| 476 | vdbg("%s: skb->len=%d, avail_space=%u", __func__, skb->len, avail_space); |
Greg Kroah-Hartman | 3b6004f | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 477 | UDSL_ASSERT(instance, !(avail_space % stride)); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 478 | |
Duncan Sands | 6f74947 | 2006-01-13 10:52:38 +0100 | [diff] [blame] | 479 | for (bytes_written = 0; bytes_written < avail_space && ctrl->len; |
| 480 | bytes_written += stride, target += stride) { |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 481 | unsigned int data_len = min_t(unsigned int, skb->len, ATM_CELL_PAYLOAD); |
| 482 | unsigned int left = ATM_CELL_PAYLOAD - data_len; |
| 483 | u8 *ptr = target; |
| 484 | |
| 485 | ptr[0] = vcc->vpi >> 4; |
| 486 | ptr[1] = (vcc->vpi << 4) | (vcc->vci >> 12); |
| 487 | ptr[2] = vcc->vci >> 4; |
| 488 | ptr[3] = vcc->vci << 4; |
| 489 | ptr[4] = 0xec; |
| 490 | ptr += ATM_CELL_HEADER; |
| 491 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 492 | skb_copy_from_linear_data(skb, ptr, data_len); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 493 | ptr += data_len; |
| 494 | __skb_pull(skb, data_len); |
| 495 | |
Nicolas Kaiser | 9196cc7 | 2010-06-09 20:43:03 +0200 | [diff] [blame^] | 496 | if (!left) |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 497 | continue; |
| 498 | |
| 499 | memset(ptr, 0, left); |
| 500 | |
| 501 | if (left >= ATM_AAL5_TRAILER) { /* trailer will go in this cell */ |
| 502 | u8 *trailer = target + ATM_CELL_SIZE - ATM_AAL5_TRAILER; |
| 503 | /* trailer[0] = 0; UU = 0 */ |
| 504 | /* trailer[1] = 0; CPI = 0 */ |
| 505 | trailer[2] = ctrl->len >> 8; |
| 506 | trailer[3] = ctrl->len; |
| 507 | |
Nicolas Kaiser | 9196cc7 | 2010-06-09 20:43:03 +0200 | [diff] [blame^] | 508 | ctrl->crc = ~crc32_be(ctrl->crc, ptr, left - 4); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 509 | |
| 510 | trailer[4] = ctrl->crc >> 24; |
| 511 | trailer[5] = ctrl->crc >> 16; |
| 512 | trailer[6] = ctrl->crc >> 8; |
| 513 | trailer[7] = ctrl->crc; |
| 514 | |
| 515 | target[3] |= 0x2; /* adjust PTI */ |
| 516 | |
| 517 | ctrl->len = 0; /* tag this skb finished */ |
Nicolas Kaiser | 6c4b7f7 | 2010-06-09 20:22:03 +0200 | [diff] [blame] | 518 | } else |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 519 | ctrl->crc = crc32_be(ctrl->crc, ptr, left); |
| 520 | } |
| 521 | |
Duncan Sands | 6f74947 | 2006-01-13 10:52:38 +0100 | [diff] [blame] | 522 | return bytes_written; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 523 | } |
| 524 | |
| 525 | |
| 526 | /************** |
| 527 | ** receive ** |
| 528 | **************/ |
| 529 | |
| 530 | static void usbatm_rx_process(unsigned long data) |
| 531 | { |
| 532 | struct usbatm_data *instance = (struct usbatm_data *)data; |
| 533 | struct urb *urb; |
| 534 | |
| 535 | while ((urb = usbatm_pop_urb(&instance->rx_channel))) { |
| 536 | vdbg("%s: processing urb 0x%p", __func__, urb); |
| 537 | |
| 538 | if (usb_pipeisoc(urb->pipe)) { |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 539 | unsigned char *merge_start = NULL; |
| 540 | unsigned int merge_length = 0; |
| 541 | const unsigned int packet_size = instance->rx_channel.packet_size; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 542 | int i; |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 543 | |
| 544 | for (i = 0; i < urb->number_of_packets; i++) { |
| 545 | if (!urb->iso_frame_desc[i].status) { |
| 546 | unsigned int actual_length = urb->iso_frame_desc[i].actual_length; |
| 547 | |
Greg Kroah-Hartman | 3b6004f | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 548 | UDSL_ASSERT(instance, actual_length <= packet_size); |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 549 | |
| 550 | if (!merge_length) |
| 551 | merge_start = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset; |
| 552 | merge_length += actual_length; |
| 553 | if (merge_length && (actual_length < packet_size)) { |
| 554 | usbatm_extract_cells(instance, merge_start, merge_length); |
| 555 | merge_length = 0; |
| 556 | } |
| 557 | } else { |
| 558 | atm_rldbg(instance, "%s: status %d in frame %d!\n", __func__, urb->status, i); |
| 559 | if (merge_length) |
| 560 | usbatm_extract_cells(instance, merge_start, merge_length); |
| 561 | merge_length = 0; |
| 562 | instance->buf_usage = 0; |
| 563 | } |
| 564 | } |
| 565 | |
| 566 | if (merge_length) |
| 567 | usbatm_extract_cells(instance, merge_start, merge_length); |
| 568 | } else |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 569 | if (!urb->status) |
| 570 | usbatm_extract_cells(instance, urb->transfer_buffer, urb->actual_length); |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 571 | else |
| 572 | instance->buf_usage = 0; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 573 | |
| 574 | if (usbatm_submit_urb(urb)) |
| 575 | return; |
| 576 | } |
| 577 | } |
| 578 | |
| 579 | |
| 580 | /*********** |
| 581 | ** send ** |
| 582 | ***********/ |
| 583 | |
| 584 | static void usbatm_tx_process(unsigned long data) |
| 585 | { |
| 586 | struct usbatm_data *instance = (struct usbatm_data *)data; |
| 587 | struct sk_buff *skb = instance->current_skb; |
| 588 | struct urb *urb = NULL; |
| 589 | const unsigned int buf_size = instance->tx_channel.buf_size; |
Duncan Sands | 6f74947 | 2006-01-13 10:52:38 +0100 | [diff] [blame] | 590 | unsigned int bytes_written = 0; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 591 | u8 *buffer = NULL; |
| 592 | |
| 593 | if (!skb) |
| 594 | skb = skb_dequeue(&instance->sndqueue); |
| 595 | |
| 596 | while (skb) { |
| 597 | if (!urb) { |
| 598 | urb = usbatm_pop_urb(&instance->tx_channel); |
| 599 | if (!urb) |
| 600 | break; /* no more senders */ |
| 601 | buffer = urb->transfer_buffer; |
Duncan Sands | 6f74947 | 2006-01-13 10:52:38 +0100 | [diff] [blame] | 602 | bytes_written = (urb->status == -EAGAIN) ? |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 603 | urb->transfer_buffer_length : 0; |
| 604 | } |
| 605 | |
Duncan Sands | 6f74947 | 2006-01-13 10:52:38 +0100 | [diff] [blame] | 606 | bytes_written += usbatm_write_cells(instance, skb, |
| 607 | buffer + bytes_written, |
| 608 | buf_size - bytes_written); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 609 | |
| 610 | vdbg("%s: wrote %u bytes from skb 0x%p to urb 0x%p", |
Duncan Sands | 6f74947 | 2006-01-13 10:52:38 +0100 | [diff] [blame] | 611 | __func__, bytes_written, skb, urb); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 612 | |
| 613 | if (!UDSL_SKB(skb)->len) { |
| 614 | struct atm_vcc *vcc = UDSL_SKB(skb)->atm.vcc; |
| 615 | |
| 616 | usbatm_pop(vcc, skb); |
| 617 | atomic_inc(&vcc->stats->tx); |
| 618 | |
| 619 | skb = skb_dequeue(&instance->sndqueue); |
| 620 | } |
| 621 | |
Duncan Sands | 6f74947 | 2006-01-13 10:52:38 +0100 | [diff] [blame] | 622 | if (bytes_written == buf_size || (!skb && bytes_written)) { |
| 623 | urb->transfer_buffer_length = bytes_written; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 624 | |
| 625 | if (usbatm_submit_urb(urb)) |
| 626 | break; |
| 627 | urb = NULL; |
| 628 | } |
| 629 | } |
| 630 | |
| 631 | instance->current_skb = skb; |
| 632 | } |
| 633 | |
| 634 | static void usbatm_cancel_send(struct usbatm_data *instance, |
| 635 | struct atm_vcc *vcc) |
| 636 | { |
| 637 | struct sk_buff *skb, *n; |
| 638 | |
| 639 | atm_dbg(instance, "%s entered\n", __func__); |
| 640 | spin_lock_irq(&instance->sndqueue.lock); |
David S. Miller | b5f61ab | 2008-09-23 00:27:47 -0700 | [diff] [blame] | 641 | skb_queue_walk_safe(&instance->sndqueue, skb, n) { |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 642 | if (UDSL_SKB(skb)->atm.vcc == vcc) { |
| 643 | atm_dbg(instance, "%s: popping skb 0x%p\n", __func__, skb); |
| 644 | __skb_unlink(skb, &instance->sndqueue); |
| 645 | usbatm_pop(vcc, skb); |
| 646 | } |
David S. Miller | b5f61ab | 2008-09-23 00:27:47 -0700 | [diff] [blame] | 647 | } |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 648 | spin_unlock_irq(&instance->sndqueue.lock); |
| 649 | |
| 650 | tasklet_disable(&instance->tx_channel.tasklet); |
| 651 | if ((skb = instance->current_skb) && (UDSL_SKB(skb)->atm.vcc == vcc)) { |
| 652 | atm_dbg(instance, "%s: popping current skb (0x%p)\n", __func__, skb); |
| 653 | instance->current_skb = NULL; |
| 654 | usbatm_pop(vcc, skb); |
| 655 | } |
| 656 | tasklet_enable(&instance->tx_channel.tasklet); |
| 657 | atm_dbg(instance, "%s done\n", __func__); |
| 658 | } |
| 659 | |
| 660 | static int usbatm_atm_send(struct atm_vcc *vcc, struct sk_buff *skb) |
| 661 | { |
| 662 | struct usbatm_data *instance = vcc->dev->dev_data; |
| 663 | struct usbatm_control *ctrl = UDSL_SKB(skb); |
| 664 | int err; |
| 665 | |
| 666 | vdbg("%s called (skb 0x%p, len %u)", __func__, skb, skb->len); |
| 667 | |
Duncan Sands | 0e42a62 | 2006-01-13 10:05:15 +0100 | [diff] [blame] | 668 | /* racy disconnection check - fine */ |
| 669 | if (!instance || instance->disconnected) { |
| 670 | #ifdef DEBUG |
| 671 | if (printk_ratelimit()) |
| 672 | printk(KERN_DEBUG "%s: %s!\n", __func__, instance ? "disconnected" : "NULL instance"); |
| 673 | #endif |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 674 | err = -ENODEV; |
| 675 | goto fail; |
| 676 | } |
| 677 | |
| 678 | if (vcc->qos.aal != ATM_AAL5) { |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 679 | atm_rldbg(instance, "%s: unsupported ATM type %d!\n", __func__, vcc->qos.aal); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 680 | err = -EINVAL; |
| 681 | goto fail; |
| 682 | } |
| 683 | |
| 684 | if (skb->len > ATM_MAX_AAL5_PDU) { |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 685 | atm_rldbg(instance, "%s: packet too long (%d vs %d)!\n", |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 686 | __func__, skb->len, ATM_MAX_AAL5_PDU); |
| 687 | err = -EINVAL; |
| 688 | goto fail; |
| 689 | } |
| 690 | |
| 691 | PACKETDEBUG(skb->data, skb->len); |
| 692 | |
| 693 | /* initialize the control block */ |
| 694 | ctrl->atm.vcc = vcc; |
| 695 | ctrl->len = skb->len; |
| 696 | ctrl->crc = crc32_be(~0, skb->data, skb->len); |
| 697 | |
| 698 | skb_queue_tail(&instance->sndqueue, skb); |
| 699 | tasklet_schedule(&instance->tx_channel.tasklet); |
| 700 | |
| 701 | return 0; |
| 702 | |
| 703 | fail: |
| 704 | usbatm_pop(vcc, skb); |
| 705 | return err; |
| 706 | } |
| 707 | |
| 708 | |
| 709 | /******************** |
| 710 | ** bean counting ** |
| 711 | ********************/ |
| 712 | |
| 713 | static void usbatm_destroy_instance(struct kref *kref) |
| 714 | { |
| 715 | struct usbatm_data *instance = container_of(kref, struct usbatm_data, refcount); |
| 716 | |
| 717 | dbg("%s", __func__); |
| 718 | |
| 719 | tasklet_kill(&instance->rx_channel.tasklet); |
| 720 | tasklet_kill(&instance->tx_channel.tasklet); |
| 721 | usb_put_dev(instance->usb_dev); |
| 722 | kfree(instance); |
| 723 | } |
| 724 | |
Adrian Bunk | 3d48586 | 2005-11-20 23:56:11 +0100 | [diff] [blame] | 725 | static void usbatm_get_instance(struct usbatm_data *instance) |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 726 | { |
| 727 | dbg("%s", __func__); |
| 728 | |
| 729 | kref_get(&instance->refcount); |
| 730 | } |
| 731 | |
Adrian Bunk | 3d48586 | 2005-11-20 23:56:11 +0100 | [diff] [blame] | 732 | static void usbatm_put_instance(struct usbatm_data *instance) |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 733 | { |
| 734 | dbg("%s", __func__); |
| 735 | |
| 736 | kref_put(&instance->refcount, usbatm_destroy_instance); |
| 737 | } |
| 738 | |
| 739 | |
| 740 | /********** |
| 741 | ** ATM ** |
| 742 | **********/ |
| 743 | |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 744 | static void usbatm_atm_dev_close(struct atm_dev *atm_dev) |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 745 | { |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 746 | struct usbatm_data *instance = atm_dev->dev_data; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 747 | |
| 748 | dbg("%s", __func__); |
| 749 | |
| 750 | if (!instance) |
| 751 | return; |
| 752 | |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 753 | atm_dev->dev_data = NULL; /* catch bugs */ |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 754 | usbatm_put_instance(instance); /* taken in usbatm_atm_init */ |
| 755 | } |
| 756 | |
| 757 | static int usbatm_atm_proc_read(struct atm_dev *atm_dev, loff_t * pos, char *page) |
| 758 | { |
| 759 | struct usbatm_data *instance = atm_dev->dev_data; |
| 760 | int left = *pos; |
| 761 | |
| 762 | if (!instance) { |
| 763 | dbg("%s: NULL instance!", __func__); |
| 764 | return -ENODEV; |
| 765 | } |
| 766 | |
| 767 | if (!left--) |
| 768 | return sprintf(page, "%s\n", instance->description); |
| 769 | |
| 770 | if (!left--) |
Johannes Berg | 7c510e4 | 2008-10-27 17:47:26 -0700 | [diff] [blame] | 771 | return sprintf(page, "MAC: %pM\n", atm_dev->esi); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 772 | |
| 773 | if (!left--) |
| 774 | return sprintf(page, |
| 775 | "AAL5: tx %d ( %d err ), rx %d ( %d err, %d drop )\n", |
| 776 | atomic_read(&atm_dev->stats.aal5.tx), |
| 777 | atomic_read(&atm_dev->stats.aal5.tx_err), |
| 778 | atomic_read(&atm_dev->stats.aal5.rx), |
| 779 | atomic_read(&atm_dev->stats.aal5.rx_err), |
| 780 | atomic_read(&atm_dev->stats.aal5.rx_drop)); |
| 781 | |
Duncan Sands | 0e42a62 | 2006-01-13 10:05:15 +0100 | [diff] [blame] | 782 | if (!left--) { |
| 783 | if (instance->disconnected) |
| 784 | return sprintf(page, "Disconnected\n"); |
| 785 | else |
| 786 | switch (atm_dev->signal) { |
| 787 | case ATM_PHY_SIG_FOUND: |
| 788 | return sprintf(page, "Line up\n"); |
| 789 | case ATM_PHY_SIG_LOST: |
| 790 | return sprintf(page, "Line down\n"); |
| 791 | default: |
| 792 | return sprintf(page, "Line state unknown\n"); |
| 793 | } |
| 794 | } |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 795 | |
| 796 | return 0; |
| 797 | } |
| 798 | |
| 799 | static int usbatm_atm_open(struct atm_vcc *vcc) |
| 800 | { |
| 801 | struct usbatm_data *instance = vcc->dev->dev_data; |
| 802 | struct usbatm_vcc_data *new = NULL; |
| 803 | int ret; |
| 804 | int vci = vcc->vci; |
| 805 | short vpi = vcc->vpi; |
| 806 | |
| 807 | if (!instance) { |
| 808 | dbg("%s: NULL data!", __func__); |
| 809 | return -ENODEV; |
| 810 | } |
| 811 | |
| 812 | atm_dbg(instance, "%s: vpi %hd, vci %d\n", __func__, vpi, vci); |
| 813 | |
| 814 | /* only support AAL5 */ |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 815 | if ((vcc->qos.aal != ATM_AAL5)) { |
| 816 | atm_warn(instance, "%s: unsupported ATM type %d!\n", __func__, vcc->qos.aal); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 817 | return -EINVAL; |
| 818 | } |
| 819 | |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 820 | /* sanity checks */ |
| 821 | if ((vcc->qos.rxtp.max_sdu < 0) || (vcc->qos.rxtp.max_sdu > ATM_MAX_AAL5_PDU)) { |
| 822 | atm_dbg(instance, "%s: max_sdu %d out of range!\n", __func__, vcc->qos.rxtp.max_sdu); |
| 823 | return -EINVAL; |
| 824 | } |
| 825 | |
Arjan van de Ven | ab3c81f | 2006-01-13 15:52:55 +0100 | [diff] [blame] | 826 | mutex_lock(&instance->serialize); /* vs self, usbatm_atm_close, usbatm_usb_disconnect */ |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 827 | |
Duncan Sands | 0e42a62 | 2006-01-13 10:05:15 +0100 | [diff] [blame] | 828 | if (instance->disconnected) { |
| 829 | atm_dbg(instance, "%s: disconnected!\n", __func__); |
| 830 | ret = -ENODEV; |
| 831 | goto fail; |
| 832 | } |
| 833 | |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 834 | if (usbatm_find_vcc(instance, vpi, vci)) { |
| 835 | atm_dbg(instance, "%s: %hd/%d already in use!\n", __func__, vpi, vci); |
| 836 | ret = -EADDRINUSE; |
| 837 | goto fail; |
| 838 | } |
| 839 | |
Duncan Sands | 9a734ef | 2006-01-13 09:38:22 +0100 | [diff] [blame] | 840 | if (!(new = kzalloc(sizeof(struct usbatm_vcc_data), GFP_KERNEL))) { |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 841 | atm_err(instance, "%s: no memory for vcc_data!\n", __func__); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 842 | ret = -ENOMEM; |
| 843 | goto fail; |
| 844 | } |
| 845 | |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 846 | new->vcc = vcc; |
| 847 | new->vpi = vpi; |
| 848 | new->vci = vci; |
| 849 | |
| 850 | new->sarb = alloc_skb(usbatm_pdu_length(vcc->qos.rxtp.max_sdu), GFP_KERNEL); |
| 851 | if (!new->sarb) { |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 852 | atm_err(instance, "%s: no memory for SAR buffer!\n", __func__); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 853 | ret = -ENOMEM; |
| 854 | goto fail; |
| 855 | } |
| 856 | |
| 857 | vcc->dev_data = new; |
| 858 | |
| 859 | tasklet_disable(&instance->rx_channel.tasklet); |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 860 | instance->cached_vcc = new; |
| 861 | instance->cached_vpi = vpi; |
| 862 | instance->cached_vci = vci; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 863 | list_add(&new->list, &instance->vcc_list); |
| 864 | tasklet_enable(&instance->rx_channel.tasklet); |
| 865 | |
| 866 | set_bit(ATM_VF_ADDR, &vcc->flags); |
| 867 | set_bit(ATM_VF_PARTIAL, &vcc->flags); |
| 868 | set_bit(ATM_VF_READY, &vcc->flags); |
| 869 | |
Arjan van de Ven | ab3c81f | 2006-01-13 15:52:55 +0100 | [diff] [blame] | 870 | mutex_unlock(&instance->serialize); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 871 | |
| 872 | atm_dbg(instance, "%s: allocated vcc data 0x%p\n", __func__, new); |
| 873 | |
| 874 | return 0; |
| 875 | |
| 876 | fail: |
| 877 | kfree(new); |
Arjan van de Ven | ab3c81f | 2006-01-13 15:52:55 +0100 | [diff] [blame] | 878 | mutex_unlock(&instance->serialize); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 879 | return ret; |
| 880 | } |
| 881 | |
| 882 | static void usbatm_atm_close(struct atm_vcc *vcc) |
| 883 | { |
| 884 | struct usbatm_data *instance = vcc->dev->dev_data; |
| 885 | struct usbatm_vcc_data *vcc_data = vcc->dev_data; |
| 886 | |
| 887 | if (!instance || !vcc_data) { |
| 888 | dbg("%s: NULL data!", __func__); |
| 889 | return; |
| 890 | } |
| 891 | |
| 892 | atm_dbg(instance, "%s entered\n", __func__); |
| 893 | |
| 894 | atm_dbg(instance, "%s: deallocating vcc 0x%p with vpi %d vci %d\n", |
| 895 | __func__, vcc_data, vcc_data->vpi, vcc_data->vci); |
| 896 | |
| 897 | usbatm_cancel_send(instance, vcc); |
| 898 | |
Arjan van de Ven | ab3c81f | 2006-01-13 15:52:55 +0100 | [diff] [blame] | 899 | mutex_lock(&instance->serialize); /* vs self, usbatm_atm_open, usbatm_usb_disconnect */ |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 900 | |
| 901 | tasklet_disable(&instance->rx_channel.tasklet); |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 902 | if (instance->cached_vcc == vcc_data) { |
| 903 | instance->cached_vcc = NULL; |
| 904 | instance->cached_vpi = ATM_VPI_UNSPEC; |
| 905 | instance->cached_vci = ATM_VCI_UNSPEC; |
| 906 | } |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 907 | list_del(&vcc_data->list); |
| 908 | tasklet_enable(&instance->rx_channel.tasklet); |
| 909 | |
| 910 | kfree_skb(vcc_data->sarb); |
| 911 | vcc_data->sarb = NULL; |
| 912 | |
| 913 | kfree(vcc_data); |
| 914 | vcc->dev_data = NULL; |
| 915 | |
| 916 | vcc->vpi = ATM_VPI_UNSPEC; |
| 917 | vcc->vci = ATM_VCI_UNSPEC; |
| 918 | clear_bit(ATM_VF_READY, &vcc->flags); |
| 919 | clear_bit(ATM_VF_PARTIAL, &vcc->flags); |
| 920 | clear_bit(ATM_VF_ADDR, &vcc->flags); |
| 921 | |
Arjan van de Ven | ab3c81f | 2006-01-13 15:52:55 +0100 | [diff] [blame] | 922 | mutex_unlock(&instance->serialize); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 923 | |
| 924 | atm_dbg(instance, "%s successful\n", __func__); |
| 925 | } |
| 926 | |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 927 | static int usbatm_atm_ioctl(struct atm_dev *atm_dev, unsigned int cmd, |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 928 | void __user * arg) |
| 929 | { |
Duncan Sands | 0e42a62 | 2006-01-13 10:05:15 +0100 | [diff] [blame] | 930 | struct usbatm_data *instance = atm_dev->dev_data; |
| 931 | |
| 932 | if (!instance || instance->disconnected) { |
| 933 | dbg("%s: %s!", __func__, instance ? "disconnected" : "NULL instance"); |
| 934 | return -ENODEV; |
| 935 | } |
| 936 | |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 937 | switch (cmd) { |
| 938 | case ATM_QUERYLOOP: |
| 939 | return put_user(ATM_LM_NONE, (int __user *)arg) ? -EFAULT : 0; |
| 940 | default: |
| 941 | return -ENOIOCTLCMD; |
| 942 | } |
| 943 | } |
| 944 | |
| 945 | static int usbatm_atm_init(struct usbatm_data *instance) |
| 946 | { |
| 947 | struct atm_dev *atm_dev; |
| 948 | int ret, i; |
| 949 | |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 950 | /* ATM init. The ATM initialization scheme suffers from an intrinsic race |
| 951 | * condition: callbacks we register can be executed at once, before we have |
| 952 | * initialized the struct atm_dev. To protect against this, all callbacks |
| 953 | * abort if atm_dev->dev_data is NULL. */ |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 954 | atm_dev = atm_dev_register(instance->driver_name, &usbatm_atm_devops, -1, NULL); |
| 955 | if (!atm_dev) { |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 956 | usb_err(instance, "%s: failed to register ATM device!\n", __func__); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 957 | return -1; |
| 958 | } |
| 959 | |
| 960 | instance->atm_dev = atm_dev; |
| 961 | |
| 962 | atm_dev->ci_range.vpi_bits = ATM_CI_MAX; |
| 963 | atm_dev->ci_range.vci_bits = ATM_CI_MAX; |
| 964 | atm_dev->signal = ATM_PHY_SIG_UNKNOWN; |
| 965 | |
| 966 | /* temp init ATM device, set to 128kbit */ |
| 967 | atm_dev->link_rate = 128 * 1000 / 424; |
| 968 | |
Simon Arlott | e9b8daf | 2007-03-06 02:47:43 -0800 | [diff] [blame] | 969 | ret = sysfs_create_link(&atm_dev->class_dev.kobj, |
| 970 | &instance->usb_intf->dev.kobj, "device"); |
| 971 | if (ret) { |
| 972 | atm_err(instance, "%s: sysfs_create_link failed: %d\n", |
| 973 | __func__, ret); |
| 974 | goto fail_sysfs; |
| 975 | } |
| 976 | |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 977 | if (instance->driver->atm_start && ((ret = instance->driver->atm_start(instance, atm_dev)) < 0)) { |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 978 | atm_err(instance, "%s: atm_start failed: %d!\n", __func__, ret); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 979 | goto fail; |
| 980 | } |
| 981 | |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 982 | usbatm_get_instance(instance); /* dropped in usbatm_atm_dev_close */ |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 983 | |
| 984 | /* ready for ATM callbacks */ |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 985 | mb(); |
| 986 | atm_dev->dev_data = instance; |
| 987 | |
| 988 | /* submit all rx URBs */ |
| 989 | for (i = 0; i < num_rcv_urbs; i++) |
| 990 | usbatm_submit_urb(instance->urbs[i]); |
| 991 | |
| 992 | return 0; |
| 993 | |
| 994 | fail: |
Simon Arlott | e9b8daf | 2007-03-06 02:47:43 -0800 | [diff] [blame] | 995 | sysfs_remove_link(&atm_dev->class_dev.kobj, "device"); |
| 996 | fail_sysfs: |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 997 | instance->atm_dev = NULL; |
Stanislaw Gruszka | 64bf69d | 2005-11-29 16:16:41 -0800 | [diff] [blame] | 998 | atm_dev_deregister(atm_dev); /* usbatm_atm_dev_close will eventually be called */ |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 999 | return ret; |
| 1000 | } |
| 1001 | |
| 1002 | |
| 1003 | /********** |
| 1004 | ** USB ** |
| 1005 | **********/ |
| 1006 | |
| 1007 | static int usbatm_do_heavy_init(void *arg) |
| 1008 | { |
| 1009 | struct usbatm_data *instance = arg; |
| 1010 | int ret; |
| 1011 | |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1012 | allow_signal(SIGTERM); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1013 | complete(&instance->thread_started); |
| 1014 | |
| 1015 | ret = instance->driver->heavy_init(instance, instance->usb_intf); |
| 1016 | |
| 1017 | if (!ret) |
| 1018 | ret = usbatm_atm_init(instance); |
| 1019 | |
Arjan van de Ven | ab3c81f | 2006-01-13 15:52:55 +0100 | [diff] [blame] | 1020 | mutex_lock(&instance->serialize); |
Pavel Emelyanov | c4504a7 | 2008-02-11 15:26:09 +0300 | [diff] [blame] | 1021 | instance->thread = NULL; |
Arjan van de Ven | ab3c81f | 2006-01-13 15:52:55 +0100 | [diff] [blame] | 1022 | mutex_unlock(&instance->serialize); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1023 | |
| 1024 | complete_and_exit(&instance->thread_exited, ret); |
| 1025 | } |
| 1026 | |
| 1027 | static int usbatm_heavy_init(struct usbatm_data *instance) |
| 1028 | { |
Pavel Emelyanov | c4504a7 | 2008-02-11 15:26:09 +0300 | [diff] [blame] | 1029 | struct task_struct *t; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1030 | |
Pavel Emelyanov | c4504a7 | 2008-02-11 15:26:09 +0300 | [diff] [blame] | 1031 | t = kthread_create(usbatm_do_heavy_init, instance, |
| 1032 | instance->driver->driver_name); |
| 1033 | if (IS_ERR(t)) { |
| 1034 | usb_err(instance, "%s: failed to create kernel_thread (%ld)!\n", |
| 1035 | __func__, PTR_ERR(t)); |
| 1036 | return PTR_ERR(t); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1037 | } |
| 1038 | |
Pavel Emelyanov | c4504a7 | 2008-02-11 15:26:09 +0300 | [diff] [blame] | 1039 | instance->thread = t; |
| 1040 | wake_up_process(t); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1041 | wait_for_completion(&instance->thread_started); |
| 1042 | |
| 1043 | return 0; |
| 1044 | } |
| 1045 | |
| 1046 | static void usbatm_tasklet_schedule(unsigned long data) |
| 1047 | { |
| 1048 | tasklet_schedule((struct tasklet_struct *) data); |
| 1049 | } |
| 1050 | |
Duncan Sands | fcf4830 | 2006-04-28 18:53:45 +0200 | [diff] [blame] | 1051 | static void usbatm_init_channel(struct usbatm_channel *channel) |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1052 | { |
| 1053 | spin_lock_init(&channel->lock); |
| 1054 | INIT_LIST_HEAD(&channel->list); |
| 1055 | channel->delay.function = usbatm_tasklet_schedule; |
| 1056 | channel->delay.data = (unsigned long) &channel->tasklet; |
| 1057 | init_timer(&channel->delay); |
| 1058 | } |
| 1059 | |
| 1060 | int usbatm_usb_probe(struct usb_interface *intf, const struct usb_device_id *id, |
| 1061 | struct usbatm_driver *driver) |
| 1062 | { |
| 1063 | struct device *dev = &intf->dev; |
| 1064 | struct usb_device *usb_dev = interface_to_usbdev(intf); |
| 1065 | struct usbatm_data *instance; |
| 1066 | char *buf; |
| 1067 | int error = -ENOMEM; |
| 1068 | int i, length; |
Duncan Sands | 6f74947 | 2006-01-13 10:52:38 +0100 | [diff] [blame] | 1069 | unsigned int maxpacket, num_packets; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1070 | |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 1071 | dev_dbg(dev, "%s: trying driver %s with vendor=%04x, product=%04x, ifnum %2d\n", |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1072 | __func__, driver->driver_name, |
| 1073 | le16_to_cpu(usb_dev->descriptor.idVendor), |
| 1074 | le16_to_cpu(usb_dev->descriptor.idProduct), |
| 1075 | intf->altsetting->desc.bInterfaceNumber); |
| 1076 | |
| 1077 | /* instance init */ |
Pekka Enberg | 7b842b6 | 2005-09-06 15:18:34 -0700 | [diff] [blame] | 1078 | instance = kzalloc(sizeof(*instance) + sizeof(struct urb *) * (num_rcv_urbs + num_snd_urbs), GFP_KERNEL); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1079 | if (!instance) { |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 1080 | dev_err(dev, "%s: no memory for instance data!\n", __func__); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1081 | return -ENOMEM; |
| 1082 | } |
| 1083 | |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1084 | /* public fields */ |
| 1085 | |
| 1086 | instance->driver = driver; |
| 1087 | snprintf(instance->driver_name, sizeof(instance->driver_name), driver->driver_name); |
| 1088 | |
| 1089 | instance->usb_dev = usb_dev; |
| 1090 | instance->usb_intf = intf; |
| 1091 | |
| 1092 | buf = instance->description; |
| 1093 | length = sizeof(instance->description); |
| 1094 | |
| 1095 | if ((i = usb_string(usb_dev, usb_dev->descriptor.iProduct, buf, length)) < 0) |
| 1096 | goto bind; |
| 1097 | |
| 1098 | buf += i; |
| 1099 | length -= i; |
| 1100 | |
| 1101 | i = scnprintf(buf, length, " ("); |
| 1102 | buf += i; |
| 1103 | length -= i; |
| 1104 | |
| 1105 | if (length <= 0 || (i = usb_make_path(usb_dev, buf, length)) < 0) |
| 1106 | goto bind; |
| 1107 | |
| 1108 | buf += i; |
| 1109 | length -= i; |
| 1110 | |
| 1111 | snprintf(buf, length, ")"); |
| 1112 | |
| 1113 | bind: |
Duncan Sands | 35644b0 | 2006-01-17 11:16:13 +0100 | [diff] [blame] | 1114 | if (driver->bind && (error = driver->bind(instance, intf, id)) < 0) { |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 1115 | dev_err(dev, "%s: bind failed: %d!\n", __func__, error); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1116 | goto fail_free; |
| 1117 | } |
| 1118 | |
| 1119 | /* private fields */ |
| 1120 | |
| 1121 | kref_init(&instance->refcount); /* dropped in usbatm_usb_disconnect */ |
Arjan van de Ven | ab3c81f | 2006-01-13 15:52:55 +0100 | [diff] [blame] | 1122 | mutex_init(&instance->serialize); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1123 | |
Pavel Emelyanov | c4504a7 | 2008-02-11 15:26:09 +0300 | [diff] [blame] | 1124 | instance->thread = NULL; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1125 | init_completion(&instance->thread_started); |
| 1126 | init_completion(&instance->thread_exited); |
| 1127 | |
| 1128 | INIT_LIST_HEAD(&instance->vcc_list); |
Duncan Sands | 80aae7a | 2006-01-13 10:59:23 +0100 | [diff] [blame] | 1129 | skb_queue_head_init(&instance->sndqueue); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1130 | |
| 1131 | usbatm_init_channel(&instance->rx_channel); |
| 1132 | usbatm_init_channel(&instance->tx_channel); |
| 1133 | tasklet_init(&instance->rx_channel.tasklet, usbatm_rx_process, (unsigned long)instance); |
| 1134 | tasklet_init(&instance->tx_channel.tasklet, usbatm_tx_process, (unsigned long)instance); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1135 | instance->rx_channel.stride = ATM_CELL_SIZE + driver->rx_padding; |
| 1136 | instance->tx_channel.stride = ATM_CELL_SIZE + driver->tx_padding; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1137 | instance->rx_channel.usbatm = instance->tx_channel.usbatm = instance; |
| 1138 | |
Duncan Sands | 80aae7a | 2006-01-13 10:59:23 +0100 | [diff] [blame] | 1139 | if ((instance->flags & UDSL_USE_ISOC) && driver->isoc_in) |
| 1140 | instance->rx_channel.endpoint = usb_rcvisocpipe(usb_dev, driver->isoc_in); |
| 1141 | else |
| 1142 | instance->rx_channel.endpoint = usb_rcvbulkpipe(usb_dev, driver->bulk_in); |
| 1143 | |
| 1144 | instance->tx_channel.endpoint = usb_sndbulkpipe(usb_dev, driver->bulk_out); |
| 1145 | |
Duncan Sands | 6f74947 | 2006-01-13 10:52:38 +0100 | [diff] [blame] | 1146 | /* tx buffer size must be a positive multiple of the stride */ |
Nicolas Kaiser | 9196cc7 | 2010-06-09 20:43:03 +0200 | [diff] [blame^] | 1147 | instance->tx_channel.buf_size = max(instance->tx_channel.stride, |
Duncan Sands | 6f74947 | 2006-01-13 10:52:38 +0100 | [diff] [blame] | 1148 | snd_buf_bytes - (snd_buf_bytes % instance->tx_channel.stride)); |
| 1149 | |
| 1150 | /* rx buffer size must be a positive multiple of the endpoint maxpacket */ |
| 1151 | maxpacket = usb_maxpacket(usb_dev, instance->rx_channel.endpoint, 0); |
| 1152 | |
| 1153 | if ((maxpacket < 1) || (maxpacket > UDSL_MAX_BUF_SIZE)) { |
| 1154 | dev_err(dev, "%s: invalid endpoint %02x!\n", __func__, |
| 1155 | usb_pipeendpoint(instance->rx_channel.endpoint)); |
| 1156 | error = -EINVAL; |
| 1157 | goto fail_unbind; |
| 1158 | } |
| 1159 | |
Nicolas Kaiser | 9196cc7 | 2010-06-09 20:43:03 +0200 | [diff] [blame^] | 1160 | num_packets = max(1U, (rcv_buf_bytes + maxpacket / 2) / maxpacket); /* round */ |
Duncan Sands | 6f74947 | 2006-01-13 10:52:38 +0100 | [diff] [blame] | 1161 | |
| 1162 | if (num_packets * maxpacket > UDSL_MAX_BUF_SIZE) |
| 1163 | num_packets--; |
| 1164 | |
| 1165 | instance->rx_channel.buf_size = num_packets * maxpacket; |
Duncan Sands | 80aae7a | 2006-01-13 10:59:23 +0100 | [diff] [blame] | 1166 | instance->rx_channel.packet_size = maxpacket; |
Duncan Sands | 6f74947 | 2006-01-13 10:52:38 +0100 | [diff] [blame] | 1167 | |
| 1168 | #ifdef DEBUG |
| 1169 | for (i = 0; i < 2; i++) { |
| 1170 | struct usbatm_channel *channel = i ? |
| 1171 | &instance->tx_channel : &instance->rx_channel; |
| 1172 | |
| 1173 | dev_dbg(dev, "%s: using %d byte buffer for %s channel 0x%p\n", __func__, channel->buf_size, i ? "tx" : "rx", channel); |
| 1174 | } |
| 1175 | #endif |
| 1176 | |
Duncan Sands | 80aae7a | 2006-01-13 10:59:23 +0100 | [diff] [blame] | 1177 | /* initialize urbs */ |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1178 | |
| 1179 | for (i = 0; i < num_rcv_urbs + num_snd_urbs; i++) { |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1180 | u8 *buffer; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1181 | struct usbatm_channel *channel = i < num_rcv_urbs ? |
| 1182 | &instance->rx_channel : &instance->tx_channel; |
Duncan Sands | 80aae7a | 2006-01-13 10:59:23 +0100 | [diff] [blame] | 1183 | struct urb *urb; |
| 1184 | unsigned int iso_packets = usb_pipeisoc(channel->endpoint) ? channel->buf_size / channel->packet_size : 0; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1185 | |
Greg Kroah-Hartman | 3b6004f | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 1186 | UDSL_ASSERT(instance, !usb_pipeisoc(channel->endpoint) || usb_pipein(channel->endpoint)); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1187 | |
| 1188 | urb = usb_alloc_urb(iso_packets, GFP_KERNEL); |
| 1189 | if (!urb) { |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 1190 | dev_err(dev, "%s: no memory for urb %d!\n", __func__, i); |
Duncan Sands | 72ef8ab | 2006-01-13 10:07:08 +0100 | [diff] [blame] | 1191 | error = -ENOMEM; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1192 | goto fail_unbind; |
| 1193 | } |
| 1194 | |
Duncan Sands | 65412e4 | 2005-05-27 10:00:08 +0200 | [diff] [blame] | 1195 | instance->urbs[i] = urb; |
| 1196 | |
Duncan Sands | 9a734ef | 2006-01-13 09:38:22 +0100 | [diff] [blame] | 1197 | /* zero the tx padding to avoid leaking information */ |
| 1198 | buffer = kzalloc(channel->buf_size, GFP_KERNEL); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1199 | if (!buffer) { |
Duncan Sands | 0ec3c7e | 2006-01-17 11:15:13 +0100 | [diff] [blame] | 1200 | dev_err(dev, "%s: no memory for buffer %d!\n", __func__, i); |
Duncan Sands | 72ef8ab | 2006-01-13 10:07:08 +0100 | [diff] [blame] | 1201 | error = -ENOMEM; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1202 | goto fail_unbind; |
| 1203 | } |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1204 | |
| 1205 | usb_fill_bulk_urb(urb, instance->usb_dev, channel->endpoint, |
| 1206 | buffer, channel->buf_size, usbatm_complete, channel); |
| 1207 | if (iso_packets) { |
| 1208 | int j; |
| 1209 | urb->interval = 1; |
| 1210 | urb->transfer_flags = URB_ISO_ASAP; |
| 1211 | urb->number_of_packets = iso_packets; |
| 1212 | for (j = 0; j < iso_packets; j++) { |
Duncan Sands | 80aae7a | 2006-01-13 10:59:23 +0100 | [diff] [blame] | 1213 | urb->iso_frame_desc[j].offset = channel->packet_size * j; |
| 1214 | urb->iso_frame_desc[j].length = channel->packet_size; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1215 | } |
| 1216 | } |
| 1217 | |
| 1218 | /* put all tx URBs on the list of spares */ |
| 1219 | if (i >= num_rcv_urbs) |
| 1220 | list_add_tail(&urb->urb_list, &channel->list); |
| 1221 | |
| 1222 | vdbg("%s: alloced buffer 0x%p buf size %u urb 0x%p", |
| 1223 | __func__, urb->transfer_buffer, urb->transfer_buffer_length, urb); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1224 | } |
| 1225 | |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 1226 | instance->cached_vpi = ATM_VPI_UNSPEC; |
| 1227 | instance->cached_vci = ATM_VCI_UNSPEC; |
| 1228 | instance->cell_buf = kmalloc(instance->rx_channel.stride, GFP_KERNEL); |
| 1229 | |
| 1230 | if (!instance->cell_buf) { |
| 1231 | dev_err(dev, "%s: no memory for cell buffer!\n", __func__); |
| 1232 | error = -ENOMEM; |
| 1233 | goto fail_unbind; |
| 1234 | } |
| 1235 | |
Duncan Sands | 35644b0 | 2006-01-17 11:16:13 +0100 | [diff] [blame] | 1236 | if (!(instance->flags & UDSL_SKIP_HEAVY_INIT) && driver->heavy_init) { |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1237 | error = usbatm_heavy_init(instance); |
| 1238 | } else { |
| 1239 | complete(&instance->thread_exited); /* pretend that heavy_init was run */ |
| 1240 | error = usbatm_atm_init(instance); |
| 1241 | } |
| 1242 | |
| 1243 | if (error < 0) |
| 1244 | goto fail_unbind; |
| 1245 | |
| 1246 | usb_get_dev(usb_dev); |
| 1247 | usb_set_intfdata(intf, instance); |
| 1248 | |
| 1249 | return 0; |
| 1250 | |
| 1251 | fail_unbind: |
| 1252 | if (instance->driver->unbind) |
| 1253 | instance->driver->unbind(instance, intf); |
| 1254 | fail_free: |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 1255 | kfree(instance->cell_buf); |
| 1256 | |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1257 | for (i = 0; i < num_rcv_urbs + num_snd_urbs; i++) { |
| 1258 | if (instance->urbs[i]) |
| 1259 | kfree(instance->urbs[i]->transfer_buffer); |
| 1260 | usb_free_urb(instance->urbs[i]); |
| 1261 | } |
| 1262 | |
Nicolas Kaiser | 9196cc7 | 2010-06-09 20:43:03 +0200 | [diff] [blame^] | 1263 | kfree(instance); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1264 | |
| 1265 | return error; |
| 1266 | } |
| 1267 | EXPORT_SYMBOL_GPL(usbatm_usb_probe); |
| 1268 | |
| 1269 | void usbatm_usb_disconnect(struct usb_interface *intf) |
| 1270 | { |
| 1271 | struct device *dev = &intf->dev; |
| 1272 | struct usbatm_data *instance = usb_get_intfdata(intf); |
Duncan Sands | 0e42a62 | 2006-01-13 10:05:15 +0100 | [diff] [blame] | 1273 | struct usbatm_vcc_data *vcc_data; |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1274 | int i; |
| 1275 | |
| 1276 | dev_dbg(dev, "%s entered\n", __func__); |
| 1277 | |
| 1278 | if (!instance) { |
| 1279 | dev_dbg(dev, "%s: NULL instance!\n", __func__); |
| 1280 | return; |
| 1281 | } |
| 1282 | |
| 1283 | usb_set_intfdata(intf, NULL); |
| 1284 | |
Arjan van de Ven | ab3c81f | 2006-01-13 15:52:55 +0100 | [diff] [blame] | 1285 | mutex_lock(&instance->serialize); |
Duncan Sands | 0e42a62 | 2006-01-13 10:05:15 +0100 | [diff] [blame] | 1286 | instance->disconnected = 1; |
Pavel Emelyanov | c4504a7 | 2008-02-11 15:26:09 +0300 | [diff] [blame] | 1287 | if (instance->thread != NULL) |
| 1288 | send_sig(SIGTERM, instance->thread, 1); |
Arjan van de Ven | ab3c81f | 2006-01-13 15:52:55 +0100 | [diff] [blame] | 1289 | mutex_unlock(&instance->serialize); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1290 | |
| 1291 | wait_for_completion(&instance->thread_exited); |
| 1292 | |
Arjan van de Ven | ab3c81f | 2006-01-13 15:52:55 +0100 | [diff] [blame] | 1293 | mutex_lock(&instance->serialize); |
Duncan Sands | 0e42a62 | 2006-01-13 10:05:15 +0100 | [diff] [blame] | 1294 | list_for_each_entry(vcc_data, &instance->vcc_list, list) |
| 1295 | vcc_release_async(vcc_data->vcc, -EPIPE); |
Arjan van de Ven | ab3c81f | 2006-01-13 15:52:55 +0100 | [diff] [blame] | 1296 | mutex_unlock(&instance->serialize); |
Duncan Sands | 0e42a62 | 2006-01-13 10:05:15 +0100 | [diff] [blame] | 1297 | |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1298 | tasklet_disable(&instance->rx_channel.tasklet); |
| 1299 | tasklet_disable(&instance->tx_channel.tasklet); |
| 1300 | |
| 1301 | for (i = 0; i < num_rcv_urbs + num_snd_urbs; i++) |
| 1302 | usb_kill_urb(instance->urbs[i]); |
| 1303 | |
| 1304 | del_timer_sync(&instance->rx_channel.delay); |
| 1305 | del_timer_sync(&instance->tx_channel.delay); |
| 1306 | |
Duncan Sands | 0e42a62 | 2006-01-13 10:05:15 +0100 | [diff] [blame] | 1307 | /* turn usbatm_[rt]x_process into something close to a no-op */ |
| 1308 | /* no need to take the spinlock */ |
| 1309 | INIT_LIST_HEAD(&instance->rx_channel.list); |
| 1310 | INIT_LIST_HEAD(&instance->tx_channel.list); |
| 1311 | |
| 1312 | tasklet_enable(&instance->rx_channel.tasklet); |
| 1313 | tasklet_enable(&instance->tx_channel.tasklet); |
| 1314 | |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1315 | if (instance->atm_dev && instance->driver->atm_stop) |
| 1316 | instance->driver->atm_stop(instance, instance->atm_dev); |
| 1317 | |
| 1318 | if (instance->driver->unbind) |
| 1319 | instance->driver->unbind(instance, intf); |
| 1320 | |
| 1321 | instance->driver_data = NULL; |
| 1322 | |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1323 | for (i = 0; i < num_rcv_urbs + num_snd_urbs; i++) { |
| 1324 | kfree(instance->urbs[i]->transfer_buffer); |
| 1325 | usb_free_urb(instance->urbs[i]); |
| 1326 | } |
| 1327 | |
Duncan Sands | e3fb2f6 | 2006-01-13 11:06:46 +0100 | [diff] [blame] | 1328 | kfree(instance->cell_buf); |
| 1329 | |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1330 | /* ATM finalize */ |
Simon Arlott | e9b8daf | 2007-03-06 02:47:43 -0800 | [diff] [blame] | 1331 | if (instance->atm_dev) { |
| 1332 | sysfs_remove_link(&instance->atm_dev->class_dev.kobj, "device"); |
Stanislaw Gruszka | 64bf69d | 2005-11-29 16:16:41 -0800 | [diff] [blame] | 1333 | atm_dev_deregister(instance->atm_dev); |
Simon Arlott | 9fc950d | 2009-11-21 15:33:51 +0000 | [diff] [blame] | 1334 | instance->atm_dev = NULL; |
Simon Arlott | e9b8daf | 2007-03-06 02:47:43 -0800 | [diff] [blame] | 1335 | } |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1336 | |
| 1337 | usbatm_put_instance(instance); /* taken in usbatm_usb_probe */ |
| 1338 | } |
| 1339 | EXPORT_SYMBOL_GPL(usbatm_usb_disconnect); |
| 1340 | |
| 1341 | |
| 1342 | /*********** |
| 1343 | ** init ** |
| 1344 | ***********/ |
| 1345 | |
| 1346 | static int __init usbatm_usb_init(void) |
| 1347 | { |
| 1348 | dbg("%s: driver version %s", __func__, DRIVER_VERSION); |
| 1349 | |
Thiago Farina | 08add0c | 2010-01-11 20:45:26 -0500 | [diff] [blame] | 1350 | if (sizeof(struct usbatm_control) > FIELD_SIZEOF(struct sk_buff, cb)) { |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1351 | printk(KERN_ERR "%s unusable with this kernel!\n", usbatm_driver_name); |
| 1352 | return -EIO; |
| 1353 | } |
| 1354 | |
| 1355 | if ((num_rcv_urbs > UDSL_MAX_RCV_URBS) |
| 1356 | || (num_snd_urbs > UDSL_MAX_SND_URBS) |
Duncan Sands | 6f74947 | 2006-01-13 10:52:38 +0100 | [diff] [blame] | 1357 | || (rcv_buf_bytes < 1) |
| 1358 | || (rcv_buf_bytes > UDSL_MAX_BUF_SIZE) |
| 1359 | || (snd_buf_bytes < 1) |
| 1360 | || (snd_buf_bytes > UDSL_MAX_BUF_SIZE)) |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1361 | return -EINVAL; |
| 1362 | |
| 1363 | return 0; |
| 1364 | } |
| 1365 | module_init(usbatm_usb_init); |
| 1366 | |
| 1367 | static void __exit usbatm_usb_exit(void) |
| 1368 | { |
| 1369 | dbg("%s", __func__); |
| 1370 | } |
| 1371 | module_exit(usbatm_usb_exit); |
| 1372 | |
| 1373 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 1374 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 1375 | MODULE_LICENSE("GPL"); |
| 1376 | MODULE_VERSION(DRIVER_VERSION); |
| 1377 | |
| 1378 | /************ |
| 1379 | ** debug ** |
| 1380 | ************/ |
| 1381 | |
| 1382 | #ifdef VERBOSE_DEBUG |
| 1383 | static int usbatm_print_packet(const unsigned char *data, int len) |
| 1384 | { |
| 1385 | unsigned char buffer[256]; |
| 1386 | int i = 0, j = 0; |
| 1387 | |
| 1388 | for (i = 0; i < len;) { |
| 1389 | buffer[0] = '\0'; |
| 1390 | sprintf(buffer, "%.3d :", i); |
Nicolas Kaiser | 6c4b7f7 | 2010-06-09 20:22:03 +0200 | [diff] [blame] | 1391 | for (j = 0; (j < 16) && (i < len); j++, i++) |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1392 | sprintf(buffer, "%s %2.2x", buffer, data[i]); |
Duncan Sands | c59bba7 | 2005-05-11 20:24:03 +0200 | [diff] [blame] | 1393 | dbg("%s", buffer); |
| 1394 | } |
| 1395 | return i; |
| 1396 | } |
| 1397 | #endif |