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authorDuncan Sands <duncan.sands@math.u-psud.fr>2005-05-11 14:24:03 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2005-06-27 17:43:55 -0400
commitc59bba75fa500f13ef14215d599ee0d7faa1b954 (patch)
treeb37daba6cdb31635173e781a2c742f4190ff08e3
parentd49d431744007cec0ee1a3ade96f9e0f100c7907 (diff)
[PATCH] USB ATM: new usbatm core
Rework the core usbatm code: minidrivers (i.e. drivers for particular modems) now register themselves with the usbatm core, supplying methods for binding/unbinding etc. The design was inspired by usb-serial and usbnet. At the same time, more common code from the speedtch and cxacru (patch 3/5) drivers was generalized and moved into the core. The transmission and reception parts have been unified and simplified. Since this is a major change and I don't like underscores in file names, usb_atm.[ch] has been renamed usbatm.[ch]. Many thanks to Roman Kagan, who did a lot of the coding. Signed-off-by: Duncan Sands <baldrick@free.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat
-rw-r--r--drivers/usb/atm/usb_atm.c1188
-rw-r--r--drivers/usb/atm/usb_atm.h176
-rw-r--r--drivers/usb/atm/usbatm.c1231
-rw-r--r--drivers/usb/atm/usbatm.h183
4 files changed, 1414 insertions, 1364 deletions
diff --git a/drivers/usb/atm/usb_atm.c b/drivers/usb/atm/usb_atm.c
deleted file mode 100644
index a4cd4476d49..00000000000
--- a/drivers/usb/atm/usb_atm.c
+++ /dev/null
@@ -1,1188 +0,0 @@
1/******************************************************************************
2 * usb_atm.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
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, maintained by Duncan Sands (duncan.sands@free.fr)
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 * udsl_usb_send_data_context->urb to a pointer and adding code
45 * to alloc and free it
46 * - remove_wait_queue() added to udsl_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 udsl_usb_send_data()
61 * 1.1: - Turned off packet debugging
62 *
63 */
64
65#include <linux/module.h>
66#include <linux/moduleparam.h>
67#include <linux/kernel.h>
68#include <linux/sched.h>
69#include <linux/timer.h>
70#include <linux/errno.h>
71#include <linux/proc_fs.h>
72#include <linux/slab.h>
73#include <linux/wait.h>
74#include <linux/list.h>
75#include <asm/uaccess.h>
76#include <linux/smp_lock.h>
77#include <linux/interrupt.h>
78#include <linux/atm.h>
79#include <linux/atmdev.h>
80#include <linux/crc32.h>
81#include <linux/init.h>
82#include <linux/firmware.h>
83
84#include "usb_atm.h"
85
86#ifdef VERBOSE_DEBUG
87static int udsl_print_packet(const unsigned char *data, int len);
88#define PACKETDEBUG(arg...) udsl_print_packet (arg)
89#define vdbg(arg...) dbg (arg)
90#else
91#define PACKETDEBUG(arg...)
92#define vdbg(arg...)
93#endif
94
95#define DRIVER_AUTHOR "Johan Verrept, Duncan Sands <duncan.sands@free.fr>"
96#define DRIVER_VERSION "1.8"
97#define DRIVER_DESC "Generic USB ATM/DSL I/O, version " DRIVER_VERSION
98
99static unsigned int num_rcv_urbs = UDSL_DEFAULT_RCV_URBS;
100static unsigned int num_snd_urbs = UDSL_DEFAULT_SND_URBS;
101static unsigned int num_rcv_bufs = UDSL_DEFAULT_RCV_BUFS;
102static unsigned int num_snd_bufs = UDSL_DEFAULT_SND_BUFS;
103static unsigned int rcv_buf_size = UDSL_DEFAULT_RCV_BUF_SIZE;
104static unsigned int snd_buf_size = UDSL_DEFAULT_SND_BUF_SIZE;
105
106module_param(num_rcv_urbs, uint, 0444);
107MODULE_PARM_DESC(num_rcv_urbs,
108 "Number of urbs used for reception (range: 0-"
109 __MODULE_STRING(UDSL_MAX_RCV_URBS) ", default: "
110 __MODULE_STRING(UDSL_DEFAULT_RCV_URBS) ")");
111
112module_param(num_snd_urbs, uint, 0444);
113MODULE_PARM_DESC(num_snd_urbs,
114 "Number of urbs used for transmission (range: 0-"
115 __MODULE_STRING(UDSL_MAX_SND_URBS) ", default: "
116 __MODULE_STRING(UDSL_DEFAULT_SND_URBS) ")");
117
118module_param(num_rcv_bufs, uint, 0444);
119MODULE_PARM_DESC(num_rcv_bufs,
120 "Number of buffers used for reception (range: 0-"
121 __MODULE_STRING(UDSL_MAX_RCV_BUFS) ", default: "
122 __MODULE_STRING(UDSL_DEFAULT_RCV_BUFS) ")");
123
124module_param(num_snd_bufs, uint, 0444);
125MODULE_PARM_DESC(num_snd_bufs,
126 "Number of buffers used for transmission (range: 0-"
127 __MODULE_STRING(UDSL_MAX_SND_BUFS) ", default: "
128 __MODULE_STRING(UDSL_DEFAULT_SND_BUFS) ")");
129
130module_param(rcv_buf_size, uint, 0444);
131MODULE_PARM_DESC(rcv_buf_size,
132 "Size of the buffers used for reception (range: 0-"
133 __MODULE_STRING(UDSL_MAX_RCV_BUF_SIZE) ", default: "
134 __MODULE_STRING(UDSL_DEFAULT_RCV_BUF_SIZE) ")");
135
136module_param(snd_buf_size, uint, 0444);
137MODULE_PARM_DESC(snd_buf_size,
138 "Size of the buffers used for transmission (range: 0-"
139 __MODULE_STRING(UDSL_MAX_SND_BUF_SIZE) ", default: "
140 __MODULE_STRING(UDSL_DEFAULT_SND_BUF_SIZE) ")");
141
142/* ATM */
143
144static void udsl_atm_dev_close(struct atm_dev *dev);
145static int udsl_atm_open(struct atm_vcc *vcc);
146static void udsl_atm_close(struct atm_vcc *vcc);
147static int udsl_atm_ioctl(struct atm_dev *dev, unsigned int cmd, void __user * arg);
148static int udsl_atm_send(struct atm_vcc *vcc, struct sk_buff *skb);
149static int udsl_atm_proc_read(struct atm_dev *atm_dev, loff_t * pos, char *page);
150
151static struct atmdev_ops udsl_atm_devops = {
152 .dev_close = udsl_atm_dev_close,
153 .open = udsl_atm_open,
154 .close = udsl_atm_close,
155 .ioctl = udsl_atm_ioctl,
156 .send = udsl_atm_send,
157 .proc_read = udsl_atm_proc_read,
158 .owner = THIS_MODULE,
159};
160
161/***********
162** misc **
163***********/
164
165static inline void udsl_pop(struct atm_vcc *vcc, struct sk_buff *skb)
166{
167 if (vcc->pop)
168 vcc->pop(vcc, skb);
169 else
170 dev_kfree_skb(skb);
171}
172
173/*************
174** decode **
175*************/
176
177static inline struct udsl_vcc_data *udsl_find_vcc(struct udsl_instance_data *instance,
178 short vpi, int vci)
179{
180 struct udsl_vcc_data *vcc;
181
182 list_for_each_entry(vcc, &instance->vcc_list, list)
183 if ((vcc->vci == vci) && (vcc->vpi == vpi))
184 return vcc;
185 return NULL;
186}
187
188static void udsl_extract_cells(struct udsl_instance_data *instance,
189 unsigned char *source, unsigned int howmany)
190{
191 struct udsl_vcc_data *cached_vcc = NULL;
192 struct atm_vcc *vcc;
193 struct sk_buff *sarb;
194 struct udsl_vcc_data *vcc_data;
195 int cached_vci = 0;
196 unsigned int i;
197 int pti;
198 int vci;
199 short cached_vpi = 0;
200 short vpi;
201
202 for (i = 0; i < howmany;
203 i++, source += ATM_CELL_SIZE + instance->rcv_padding) {
204 vpi = ((source[0] & 0x0f) << 4) | (source[1] >> 4);
205 vci = ((source[1] & 0x0f) << 12) | (source[2] << 4) | (source[3] >> 4);
206 pti = (source[3] & 0x2) != 0;
207
208 vdbg("udsl_extract_cells: vpi %hd, vci %d, pti %d", vpi, vci, pti);
209
210 if (cached_vcc && (vci == cached_vci) && (vpi == cached_vpi))
211 vcc_data = cached_vcc;
212 else if ((vcc_data = udsl_find_vcc(instance, vpi, vci))) {
213 cached_vcc = vcc_data;
214 cached_vpi = vpi;
215 cached_vci = vci;
216 } else {
217 dbg("udsl_extract_cells: unknown vpi/vci (%hd/%d)!", vpi, vci);
218 continue;
219 }
220
221 vcc = vcc_data->vcc;
222 sarb = vcc_data->sarb;
223
224 if (sarb->tail + ATM_CELL_PAYLOAD > sarb->end) {
225 dbg("udsl_extract_cells: buffer overrun (sarb->len %u, vcc: 0x%p)!", sarb->len, vcc);
226 /* discard cells already received */
227 skb_trim(sarb, 0);
228 }
229
230 memcpy(sarb->tail, source + ATM_CELL_HEADER, ATM_CELL_PAYLOAD);
231 __skb_put(sarb, ATM_CELL_PAYLOAD);
232
233 if (pti) {
234 struct sk_buff *skb;
235 unsigned int length;
236 unsigned int pdu_length;
237
238 length = (source[ATM_CELL_SIZE - 6] << 8) + source[ATM_CELL_SIZE - 5];
239
240 /* guard against overflow */
241 if (length > ATM_MAX_AAL5_PDU) {
242 dbg("udsl_extract_cells: bogus length %u (vcc: 0x%p)!", length, vcc);
243 atomic_inc(&vcc->stats->rx_err);
244 goto out;
245 }
246
247 pdu_length = UDSL_NUM_CELLS(length) * ATM_CELL_PAYLOAD;
248
249 if (sarb->len < pdu_length) {
250 dbg("udsl_extract_cells: bogus pdu_length %u (sarb->len: %u, vcc: 0x%p)!", pdu_length, sarb->len, vcc);
251 atomic_inc(&vcc->stats->rx_err);
252 goto out;
253 }
254
255 if (crc32_be(~0, sarb->tail - pdu_length, pdu_length) != 0xc704dd7b) {
256 dbg("udsl_extract_cells: packet failed crc check (vcc: 0x%p)!", vcc);
257 atomic_inc(&vcc->stats->rx_err);
258 goto out;
259 }
260
261 vdbg("udsl_extract_cells: got packet (length: %u, pdu_length: %u, vcc: 0x%p)", length, pdu_length, vcc);
262
263 if (!(skb = dev_alloc_skb(length))) {
264 dbg("udsl_extract_cells: no memory for skb (length: %u)!", length);
265 atomic_inc(&vcc->stats->rx_drop);
266 goto out;
267 }
268
269 vdbg("udsl_extract_cells: allocated new sk_buff (skb: 0x%p, skb->truesize: %u)", skb, skb->truesize);
270
271 if (!atm_charge(vcc, skb->truesize)) {
272 dbg("udsl_extract_cells: failed atm_charge (skb->truesize: %u)!", skb->truesize);
273 dev_kfree_skb(skb);
274 goto out; /* atm_charge increments rx_drop */
275 }
276
277 memcpy(skb->data, sarb->tail - pdu_length, length);
278 __skb_put(skb, length);
279
280 vdbg("udsl_extract_cells: sending skb 0x%p, skb->len %u, skb->truesize %u", skb, skb->len, skb->truesize);
281
282 PACKETDEBUG(skb->data, skb->len);
283
284 vcc->push(vcc, skb);
285
286 atomic_inc(&vcc->stats->rx);
287 out:
288 skb_trim(sarb, 0);
289 }
290 }
291}
292
293/*************
294** encode **
295*************/
296
297static inline void udsl_fill_cell_header(unsigned char *target, struct atm_vcc *vcc)
298{
299 target[0] = vcc->vpi >> 4;
300 target[1] = (vcc->vpi << 4) | (vcc->vci >> 12);
301 target[2] = vcc->vci >> 4;
302 target[3] = vcc->vci << 4;
303 target[4] = 0xec;
304}
305
306static const unsigned char zeros[ATM_CELL_PAYLOAD];
307
308static void udsl_groom_skb(struct atm_vcc *vcc, struct sk_buff *skb)
309{
310 struct udsl_control *ctrl = UDSL_SKB(skb);
311 unsigned int zero_padding;
312 u32 crc;
313
314 ctrl->atm_data.vcc = vcc;
315
316 ctrl->num_cells = UDSL_NUM_CELLS(skb->len);
317 ctrl->num_entire = skb->len / ATM_CELL_PAYLOAD;
318
319 zero_padding = ctrl->num_cells * ATM_CELL_PAYLOAD - skb->len - ATM_AAL5_TRAILER;
320
321 if (ctrl->num_entire + 1 < ctrl->num_cells)
322 ctrl->pdu_padding = zero_padding - (ATM_CELL_PAYLOAD - ATM_AAL5_TRAILER);
323 else
324 ctrl->pdu_padding = zero_padding;
325
326 ctrl->aal5_trailer[0] = 0; /* UU = 0 */
327 ctrl->aal5_trailer[1] = 0; /* CPI = 0 */
328 ctrl->aal5_trailer[2] = skb->len >> 8;
329 ctrl->aal5_trailer[3] = skb->len;
330
331 crc = crc32_be(~0, skb->data, skb->len);
332 crc = crc32_be(crc, zeros, zero_padding);
333 crc = crc32_be(crc, ctrl->aal5_trailer, 4);
334 crc = ~crc;
335
336 ctrl->aal5_trailer[4] = crc >> 24;
337 ctrl->aal5_trailer[5] = crc >> 16;
338 ctrl->aal5_trailer[6] = crc >> 8;
339 ctrl->aal5_trailer[7] = crc;
340}
341
342static unsigned int udsl_write_cells(struct udsl_instance_data *instance,
343 unsigned int howmany, struct sk_buff *skb,
344 unsigned char **target_p)
345{
346 struct udsl_control *ctrl = UDSL_SKB(skb);
347 unsigned char *target = *target_p;
348 unsigned int nc, ne, i;
349
350 vdbg("udsl_write_cells: howmany=%u, skb->len=%d, num_cells=%u, num_entire=%u, pdu_padding=%u", howmany, skb->len, ctrl->num_cells, ctrl->num_entire, ctrl->pdu_padding);
351
352 nc = ctrl->num_cells;
353 ne = min(howmany, ctrl->num_entire);
354
355 for (i = 0; i < ne; i++) {
356 udsl_fill_cell_header(target, ctrl->atm_data.vcc);
357 target += ATM_CELL_HEADER;
358 memcpy(target, skb->data, ATM_CELL_PAYLOAD);
359 target += ATM_CELL_PAYLOAD;
360 if (instance->snd_padding) {
361 memset(target, 0, instance->snd_padding);
362 target += instance->snd_padding;
363 }
364 __skb_pull(skb, ATM_CELL_PAYLOAD);
365 }
366
367 ctrl->num_entire -= ne;
368
369 if (!(ctrl->num_cells -= ne) || !(howmany -= ne))
370 goto out;
371
372 udsl_fill_cell_header(target, ctrl->atm_data.vcc);
373 target += ATM_CELL_HEADER;
374 memcpy(target, skb->data, skb->len);
375 target += skb->len;
376 __skb_pull(skb, skb->len);
377 memset(target, 0, ctrl->pdu_padding);
378 target += ctrl->pdu_padding;
379
380 if (--ctrl->num_cells) {
381 if (!--howmany) {
382 ctrl->pdu_padding = ATM_CELL_PAYLOAD - ATM_AAL5_TRAILER;
383 goto out;
384 }
385
386 if (instance->snd_padding) {
387 memset(target, 0, instance->snd_padding);
388 target += instance->snd_padding;
389 }
390 udsl_fill_cell_header(target, ctrl->atm_data.vcc);
391 target += ATM_CELL_HEADER;
392 memset(target, 0, ATM_CELL_PAYLOAD - ATM_AAL5_TRAILER);
393 target += ATM_CELL_PAYLOAD - ATM_AAL5_TRAILER;
394
395 --ctrl->num_cells;
396 UDSL_ASSERT(!ctrl->num_cells);
397 }
398
399 memcpy(target, ctrl->aal5_trailer, ATM_AAL5_TRAILER);
400 target += ATM_AAL5_TRAILER;
401 /* set pti bit in last cell */
402 *(target + 3 - ATM_CELL_SIZE) |= 0x2;
403 if (instance->snd_padding) {
404 memset(target, 0, instance->snd_padding);
405 target += instance->snd_padding;
406 }
407 out:
408 *target_p = target;
409 return nc - ctrl->num_cells;
410}
411
412/**************
413** receive **
414**************/
415
416static void udsl_complete_receive(struct urb *urb, struct pt_regs *regs)
417{
418 struct udsl_receive_buffer *buf;
419 struct udsl_instance_data *instance;
420 struct udsl_receiver *rcv;
421 unsigned long flags;
422
423 if (!urb || !(rcv = urb->context)) {
424 dbg("udsl_complete_receive: bad urb!");
425 return;
426 }
427
428 instance = rcv->instance;
429 buf = rcv->buffer;
430
431 buf->filled_cells = urb->actual_length / (ATM_CELL_SIZE + instance->rcv_padding);
432
433 vdbg("udsl_complete_receive: urb 0x%p, status %d, actual_length %d, filled_cells %u, rcv 0x%p, buf 0x%p", urb, urb->status, urb->actual_length, buf->filled_cells, rcv, buf);
434
435 UDSL_ASSERT(buf->filled_cells <= rcv_buf_size);
436
437 /* may not be in_interrupt() */
438 spin_lock_irqsave(&instance->receive_lock, flags);
439 list_add(&rcv->list, &instance->spare_receivers);
440 list_add_tail(&buf->list, &instance->filled_receive_buffers);
441 if (likely(!urb->status))
442 tasklet_schedule(&instance->receive_tasklet);
443 spin_unlock_irqrestore(&instance->receive_lock, flags);
444}
445
446static void udsl_process_receive(unsigned long data)
447{
448 struct udsl_receive_buffer *buf;
449 struct udsl_instance_data *instance = (struct udsl_instance_data *)data;
450 struct udsl_receiver *rcv;
451 int err;
452
453 made_progress:
454 while (!list_empty(&instance->spare_receive_buffers)) {
455 spin_lock_irq(&instance->receive_lock);
456 if (list_empty(&instance->spare_receivers)) {
457 spin_unlock_irq(&instance->receive_lock);
458 break;
459 }
460 rcv = list_entry(instance->spare_receivers.next,
461 struct udsl_receiver, list);
462 list_del(&rcv->list);
463 spin_unlock_irq(&instance->receive_lock);
464
465 buf = list_entry(instance->spare_receive_buffers.next,
466 struct udsl_receive_buffer, list);
467 list_del(&buf->list);
468
469 rcv->buffer = buf;
470
471 usb_fill_bulk_urb(rcv->urb, instance->usb_dev,
472 usb_rcvbulkpipe(instance->usb_dev, instance->data_endpoint),
473 buf->base,
474 rcv_buf_size * (ATM_CELL_SIZE + instance->rcv_padding),
475 udsl_complete_receive, rcv);
476
477 vdbg("udsl_process_receive: sending urb 0x%p, rcv 0x%p, buf 0x%p",
478 rcv->urb, rcv, buf);
479
480 if ((err = usb_submit_urb(rcv->urb, GFP_ATOMIC)) < 0) {
481 dbg("udsl_process_receive: urb submission failed (%d)!", err);
482 list_add(&buf->list, &instance->spare_receive_buffers);
483 spin_lock_irq(&instance->receive_lock);
484 list_add(&rcv->list, &instance->spare_receivers);
485 spin_unlock_irq(&instance->receive_lock);
486 break;
487 }
488 }
489
490 spin_lock_irq(&instance->receive_lock);
491 if (list_empty(&instance->filled_receive_buffers)) {
492 spin_unlock_irq(&instance->receive_lock);
493 return; /* done - no more buffers */
494 }
495 buf = list_entry(instance->filled_receive_buffers.next,
496 struct udsl_receive_buffer, list);
497 list_del(&buf->list);
498 spin_unlock_irq(&instance->receive_lock);
499
500 vdbg("udsl_process_receive: processing buf 0x%p", buf);
501 udsl_extract_cells(instance, buf->base, buf->filled_cells);
502 list_add(&buf->list, &instance->spare_receive_buffers);
503 goto made_progress;
504}
505
506/***********
507** send **
508***********/
509
510static void udsl_complete_send(struct urb *urb, struct pt_regs *regs)
511{
512 struct udsl_instance_data *instance;
513 struct udsl_sender *snd;
514 unsigned long flags;
515
516 if (!urb || !(snd = urb->context) || !(instance = snd->instance)) {
517 dbg("udsl_complete_send: bad urb!");
518 return;
519 }
520
521 vdbg("udsl_complete_send: urb 0x%p, status %d, snd 0x%p, buf 0x%p", urb,
522 urb->status, snd, snd->buffer);
523
524 /* may not be in_interrupt() */
525 spin_lock_irqsave(&instance->send_lock, flags);
526 list_add(&snd->list, &instance->spare_senders);
527 list_add(&snd->buffer->list, &instance->spare_send_buffers);
528 tasklet_schedule(&instance->send_tasklet);
529 spin_unlock_irqrestore(&instance->send_lock, flags);
530}
531
532static void udsl_process_send(unsigned long data)
533{
534 struct udsl_send_buffer *buf;
535 struct udsl_instance_data *instance = (struct udsl_instance_data *)data;
536 struct sk_buff *skb;
537 struct udsl_sender *snd;
538 int err;
539 unsigned int num_written;
540
541 made_progress:
542 spin_lock_irq(&instance->send_lock);
543 while (!list_empty(&instance->spare_senders)) {
544 if (!list_empty(&instance->filled_send_buffers)) {
545 buf = list_entry(instance->filled_send_buffers.next,
546 struct udsl_send_buffer, list);
547 list_del(&buf->list);
548 } else if ((buf = instance->current_buffer)) {
549 instance->current_buffer = NULL;
550 } else /* all buffers empty */
551 break;
552
553 snd = list_entry(instance->spare_senders.next,
554 struct udsl_sender, list);
555 list_del(&snd->list);
556 spin_unlock_irq(&instance->send_lock);
557
558 snd->buffer = buf;
559 usb_fill_bulk_urb(snd->urb, instance->usb_dev,
560 usb_sndbulkpipe(instance->usb_dev, instance->data_endpoint),
561 buf->base,
562 (snd_buf_size - buf->free_cells) * (ATM_CELL_SIZE + instance->snd_padding),
563 udsl_complete_send, snd);
564
565 vdbg("udsl_process_send: submitting urb 0x%p (%d cells), snd 0x%p, buf 0x%p",
566 snd->urb, snd_buf_size - buf->free_cells, snd, buf);
567
568 if ((err = usb_submit_urb(snd->urb, GFP_ATOMIC)) < 0) {
569 dbg("udsl_process_send: urb submission failed (%d)!", err);
570 spin_lock_irq(&instance->send_lock);
571 list_add(&snd->list, &instance->spare_senders);
572 spin_unlock_irq(&instance->send_lock);
573 list_add(&buf->list, &instance->filled_send_buffers);
574 return; /* bail out */
575 }
576
577 spin_lock_irq(&instance->send_lock);
578 } /* while */
579 spin_unlock_irq(&instance->send_lock);
580
581 if (!instance->current_skb)
582 instance->current_skb = skb_dequeue(&instance->sndqueue);
583 if (!instance->current_skb)
584 return; /* done - no more skbs */
585
586 skb = instance->current_skb;
587
588 if (!(buf = instance->current_buffer)) {
589 spin_lock_irq(&instance->send_lock);
590 if (list_empty(&instance->spare_send_buffers)) {
591 instance->current_buffer = NULL;
592 spin_unlock_irq(&instance->send_lock);
593 return; /* done - no more buffers */
594 }
595 buf = list_entry(instance->spare_send_buffers.next,
596 struct udsl_send_buffer, list);
597 list_del(&buf->list);
598 spin_unlock_irq(&instance->send_lock);
599
600 buf->free_start = buf->base;
601 buf->free_cells = snd_buf_size;
602
603 instance->current_buffer = buf;
604 }
605
606 num_written = udsl_write_cells(instance, buf->free_cells, skb, &buf->free_start);
607
608 vdbg("udsl_process_send: wrote %u cells from skb 0x%p to buffer 0x%p",
609 num_written, skb, buf);
610
611 if (!(buf->free_cells -= num_written)) {
612 list_add_tail(&buf->list, &instance->filled_send_buffers);
613 instance->current_buffer = NULL;
614 }
615
616 vdbg("udsl_process_send: buffer contains %d cells, %d left",
617 snd_buf_size - buf->free_cells, buf->free_cells);
618
619 if (!UDSL_SKB(skb)->num_cells) {
620 struct atm_vcc *vcc = UDSL_SKB(skb)->atm_data.vcc;
621
622 udsl_pop(vcc, skb);
623 instance->current_skb = NULL;
624
625 atomic_inc(&vcc->stats->tx);
626 }
627
628 goto made_progress;
629}
630
631static void udsl_cancel_send(struct udsl_instance_data *instance,
632 struct atm_vcc *vcc)
633{
634 struct sk_buff *skb, *n;
635
636 dbg("udsl_cancel_send entered");
637 spin_lock_irq(&instance->sndqueue.lock);
638 for (skb = instance->sndqueue.next, n = skb->next;
639 skb != (struct sk_buff *)&instance->sndqueue;
640 skb = n, n = skb->next)
641 if (UDSL_SKB(skb)->atm_data.vcc == vcc) {
642 dbg("udsl_cancel_send: popping skb 0x%p", skb);
643 __skb_unlink(skb, &instance->sndqueue);
644 udsl_pop(vcc, skb);
645 }
646 spin_unlock_irq(&instance->sndqueue.lock);
647
648 tasklet_disable(&instance->send_tasklet);
649 if ((skb = instance->current_skb) && (UDSL_SKB(skb)->atm_data.vcc == vcc)) {
650 dbg("udsl_cancel_send: popping current skb (0x%p)", skb);
651 instance->current_skb = NULL;
652 udsl_pop(vcc, skb);
653 }
654 tasklet_enable(&instance->send_tasklet);
655 dbg("udsl_cancel_send done");
656}
657
658static int udsl_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
659{
660 struct udsl_instance_data *instance = vcc->dev->dev_data;
661 int err;
662
663 vdbg("udsl_atm_send called (skb 0x%p, len %u)", skb, skb->len);
664
665 if (!instance) {
666 dbg("udsl_atm_send: NULL data!");
667 err = -ENODEV;
668 goto fail;
669 }
670
671 if (vcc->qos.aal != ATM_AAL5) {
672 dbg("udsl_atm_send: unsupported ATM type %d!", vcc->qos.aal);
673 err = -EINVAL;
674 goto fail;
675 }
676
677 if (skb->len > ATM_MAX_AAL5_PDU) {
678 dbg("udsl_atm_send: packet too long (%d vs %d)!", skb->len,
679 ATM_MAX_AAL5_PDU);
680 err = -EINVAL;
681 goto fail;
682 }
683
684 PACKETDEBUG(skb->data, skb->len);
685
686 udsl_groom_skb(vcc, skb);
687 skb_queue_tail(&instance->sndqueue, skb);
688 tasklet_schedule(&instance->send_tasklet);
689
690 return 0;
691
692 fail:
693 udsl_pop(vcc, skb);
694 return err;
695}
696
697/********************
698** bean counting **
699********************/
700
701static void udsl_destroy_instance(struct kref *kref)
702{
703 struct udsl_instance_data *instance =
704 container_of(kref, struct udsl_instance_data, refcount);
705
706 tasklet_kill(&instance->receive_tasklet);
707 tasklet_kill(&instance->send_tasklet);
708 usb_put_dev(instance->usb_dev);
709 kfree(instance);
710}
711
712void udsl_get_instance(struct udsl_instance_data *instance)
713{
714 kref_get(&instance->refcount);
715}
716
717void udsl_put_instance(struct udsl_instance_data *instance)
718{
719 kref_put(&instance->refcount, udsl_destroy_instance);
720}
721
722/**********
723** ATM **
724**********/
725
726static void udsl_atm_dev_close(struct atm_dev *dev)
727{
728 struct udsl_instance_data *instance = dev->dev_data;
729
730 dev->dev_data = NULL;
731 udsl_put_instance(instance);
732}
733
734static int udsl_atm_proc_read(struct atm_dev *atm_dev, loff_t * pos, char *page)
735{
736 struct udsl_instance_data *instance = atm_dev->dev_data;
737 int left = *pos;
738
739 if (!instance) {
740 dbg("udsl_atm_proc_read: NULL instance!");
741 return -ENODEV;
742 }
743
744 if (!left--)
745 return sprintf(page, "%s\n", instance->description);
746
747 if (!left--)
748 return sprintf(page, "MAC: %02x:%02x:%02x:%02x:%02x:%02x\n",
749 atm_dev->esi[0], atm_dev->esi[1],
750 atm_dev->esi[2], atm_dev->esi[3],
751 atm_dev->esi[4], atm_dev->esi[5]);
752
753 if (!left--)
754 return sprintf(page,
755 "AAL5: tx %d ( %d err ), rx %d ( %d err, %d drop )\n",
756 atomic_read(&atm_dev->stats.aal5.tx),
757 atomic_read(&atm_dev->stats.aal5.tx_err),
758 atomic_read(&atm_dev->stats.aal5.rx),
759 atomic_read(&atm_dev->stats.aal5.rx_err),
760 atomic_read(&atm_dev->stats.aal5.rx_drop));
761
762 if (!left--) {
763 switch (atm_dev->signal) {
764 case ATM_PHY_SIG_FOUND:
765 sprintf(page, "Line up");
766 break;
767 case ATM_PHY_SIG_LOST:
768 sprintf(page, "Line down");
769 break;
770 default:
771 sprintf(page, "Line state unknown");
772 break;
773 }
774
775 if (instance->usb_dev->state == USB_STATE_NOTATTACHED)
776 strcat(page, ", disconnected\n");
777 else {
778 if (instance->status == UDSL_LOADED_FIRMWARE)
779 strcat(page, ", firmware loaded\n");
780 else if (instance->status == UDSL_LOADING_FIRMWARE)
781 strcat(page, ", firmware loading\n");
782 else
783 strcat(page, ", no firmware\n");
784 }
785
786 return strlen(page);
787 }
788
789 return 0;
790}
791
792static int udsl_atm_open(struct atm_vcc *vcc)
793{
794 struct udsl_instance_data *instance = vcc->dev->dev_data;
795 struct udsl_vcc_data *new;
796 unsigned int max_pdu;
797 int vci = vcc->vci;
798 short vpi = vcc->vpi;
799 int err;
800
801 dbg("udsl_atm_open: vpi %hd, vci %d", vpi, vci);
802
803 if (!instance) {
804 dbg("udsl_atm_open: NULL data!");
805 return -ENODEV;
806 }
807
808 /* only support AAL5 */
809 if ((vcc->qos.aal != ATM_AAL5) || (vcc->qos.rxtp.max_sdu < 0)
810 || (vcc->qos.rxtp.max_sdu > ATM_MAX_AAL5_PDU)) {
811 dbg("udsl_atm_open: unsupported ATM type %d!", vcc->qos.aal);
812 return -EINVAL;
813 }
814
815 if (instance->firmware_wait &&
816 (err = instance->firmware_wait(instance)) < 0) {
817 dbg("udsl_atm_open: firmware not loaded (%d)!", err);
818 return err;
819 }
820
821 down(&instance->serialize); /* vs self, udsl_atm_close */
822
823 if (udsl_find_vcc(instance, vpi, vci)) {
824 dbg("udsl_atm_open: %hd/%d already in use!", vpi, vci);
825 up(&instance->serialize);
826 return -EADDRINUSE;
827 }
828
829 if (!(new = kmalloc(sizeof(struct udsl_vcc_data), GFP_KERNEL))) {
830 dbg("udsl_atm_open: no memory for vcc_data!");
831 up(&instance->serialize);
832 return -ENOMEM;
833 }
834
835 memset(new, 0, sizeof(struct udsl_vcc_data));
836 new->vcc = vcc;
837 new->vpi = vpi;
838 new->vci = vci;
839
840 /* udsl_extract_cells requires at least one cell */
841 max_pdu = max(1, UDSL_NUM_CELLS(vcc->qos.rxtp.max_sdu)) * ATM_CELL_PAYLOAD;
842 if (!(new->sarb = alloc_skb(max_pdu, GFP_KERNEL))) {
843 dbg("udsl_atm_open: no memory for SAR buffer!");
844 kfree(new);
845 up(&instance->serialize);
846 return -ENOMEM;
847 }
848
849 vcc->dev_data = new;
850
851 tasklet_disable(&instance->receive_tasklet);
852 list_add(&new->list, &instance->vcc_list);
853 tasklet_enable(&instance->receive_tasklet);
854
855 set_bit(ATM_VF_ADDR, &vcc->flags);
856 set_bit(ATM_VF_PARTIAL, &vcc->flags);
857 set_bit(ATM_VF_READY, &vcc->flags);
858
859 up(&instance->serialize);
860
861 tasklet_schedule(&instance->receive_tasklet);
862
863 dbg("udsl_atm_open: allocated vcc data 0x%p (max_pdu: %u)", new, max_pdu);
864
865 return 0;
866}
867
868static void udsl_atm_close(struct atm_vcc *vcc)
869{
870 struct udsl_instance_data *instance = vcc->dev->dev_data;
871 struct udsl_vcc_data *vcc_data = vcc->dev_data;
872
873 dbg("udsl_atm_close called");
874
875 if (!instance || !vcc_data) {
876 dbg("udsl_atm_close: NULL data!");
877 return;
878 }
879
880 dbg("udsl_atm_close: deallocating vcc 0x%p with vpi %d vci %d",
881 vcc_data, vcc_data->vpi, vcc_data->vci);
882
883 udsl_cancel_send(instance, vcc);
884
885 down(&instance->serialize); /* vs self, udsl_atm_open */
886
887 tasklet_disable(&instance->receive_tasklet);
888 list_del(&vcc_data->list);
889 tasklet_enable(&instance->receive_tasklet);
890
891 kfree_skb(vcc_data->sarb);
892 vcc_data->sarb = NULL;
893
894 kfree(vcc_data);
895 vcc->dev_data = NULL;
896
897 vcc->vpi = ATM_VPI_UNSPEC;
898 vcc->vci = ATM_VCI_UNSPEC;
899 clear_bit(ATM_VF_READY, &vcc->flags);
900 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
901 clear_bit(ATM_VF_ADDR, &vcc->flags);
902
903 up(&instance->serialize);
904
905 dbg("udsl_atm_close successful");
906}
907
908static int udsl_atm_ioctl(struct atm_dev *dev, unsigned int cmd,
909 void __user * arg)
910{
911 switch (cmd) {
912 case ATM_QUERYLOOP:
913 return put_user(ATM_LM_NONE, (int __user *)arg) ? -EFAULT : 0;
914 default:
915 return -ENOIOCTLCMD;
916 }
917}
918
919/**********
920** USB **
921**********/
922
923int udsl_instance_setup(struct usb_device *dev,
924 struct udsl_instance_data *instance)
925{
926 char *buf;
927 int i, length;
928
929 kref_init(&instance->refcount); /* one for USB */
930 udsl_get_instance(instance); /* one for ATM */
931
932 init_MUTEX(&instance->serialize);
933
934 instance->usb_dev = dev;
935
936 INIT_LIST_HEAD(&instance->vcc_list);
937
938 instance->status = UDSL_NO_FIRMWARE;
939 init_waitqueue_head(&instance->firmware_waiters);
940
941 spin_lock_init(&instance->receive_lock);
942 INIT_LIST_HEAD(&instance->spare_receivers);
943 INIT_LIST_HEAD(&instance->filled_receive_buffers);
944
945 tasklet_init(&instance->receive_tasklet, udsl_process_receive, (unsigned long)instance);
946 INIT_LIST_HEAD(&instance->spare_receive_buffers);
947
948 skb_queue_head_init(&instance->sndqueue);
949
950 spin_lock_init(&instance->send_lock);
951 INIT_LIST_HEAD(&instance->spare_senders);
952 INIT_LIST_HEAD(&instance->spare_send_buffers);
953
954 tasklet_init(&instance->send_tasklet, udsl_process_send,
955 (unsigned long)instance);
956 INIT_LIST_HEAD(&instance->filled_send_buffers);
957
958 /* receive init */
959 for (i = 0; i < num_rcv_urbs; i++) {
960 struct udsl_receiver *rcv = &(instance->receivers[i]);
961
962 if (!(rcv->urb = usb_alloc_urb(0, GFP_KERNEL))) {
963 dbg("udsl_usb_probe: no memory for receive urb %d!", i);
964 goto fail;
965 }
966
967 rcv->instance = instance;
968
969 list_add(&rcv->list, &instance->spare_receivers);
970 }
971
972 for (i = 0; i < num_rcv_bufs; i++) {
973 struct udsl_receive_buffer *buf =
974 &(instance->receive_buffers[i]);
975
976 buf->base = kmalloc(rcv_buf_size * (ATM_CELL_SIZE + instance->rcv_padding),
977 GFP_KERNEL);
978 if (!buf->base) {
979 dbg("udsl_usb_probe: no memory for receive buffer %d!", i);
980 goto fail;
981 }
982
983 list_add(&buf->list, &instance->spare_receive_buffers);
984 }
985
986 /* send init */
987 for (i = 0; i < num_snd_urbs; i++) {
988 struct udsl_sender *snd = &(instance->senders[i]);
989
990 if (!(snd->urb = usb_alloc_urb(0, GFP_KERNEL))) {
991 dbg("udsl_usb_probe: no memory for send urb %d!", i);
992 goto fail;
993 }
994
995 snd->instance = instance;
996
997 list_add(&snd->list, &instance->spare_senders);
998 }
999
1000 for (i = 0; i < num_snd_bufs; i++) {
1001 struct udsl_send_buffer *buf = &(instance->send_buffers[i]);
1002
1003 buf->base = kmalloc(snd_buf_size * (ATM_CELL_SIZE + instance->snd_padding),
1004 GFP_KERNEL);
1005 if (!buf->base) {
1006 dbg("udsl_usb_probe: no memory for send buffer %d!", i);
1007 goto fail;
1008 }
1009
1010 list_add(&buf->list, &instance->spare_send_buffers);
1011 }
1012
1013 /* ATM init */
1014 instance->atm_dev = atm_dev_register(instance->driver_name,
1015 &udsl_atm_devops, -1, NULL);
1016 if (!instance->atm_dev) {
1017 dbg("udsl_usb_probe: failed to register ATM device!");
1018 goto fail;
1019 }
1020
1021 instance->atm_dev->ci_range.vpi_bits = ATM_CI_MAX;
1022 instance->atm_dev->ci_range.vci_bits = ATM_CI_MAX;
1023 instance->atm_dev->signal = ATM_PHY_SIG_UNKNOWN;
1024
1025 /* temp init ATM device, set to 128kbit */
1026 instance->atm_dev->link_rate = 128 * 1000 / 424;
1027
1028 /* device description */
1029 buf = instance->description;
1030 length = sizeof(instance->description);
1031
1032 if ((i = usb_string(dev, dev->descriptor.iProduct, buf, length)) < 0)
1033 goto finish;
1034
1035 buf += i;
1036 length -= i;
1037
1038 i = scnprintf(buf, length, " (");
1039 buf += i;
1040 length -= i;
1041
1042 if (length <= 0 || (i = usb_make_path(dev, buf, length)) < 0)
1043 goto finish;
1044
1045 buf += i;
1046 length -= i;
1047
1048 snprintf(buf, length, ")");
1049
1050 finish:
1051 /* ready for ATM callbacks */
1052 wmb();
1053 instance->atm_dev->dev_data = instance;
1054
1055 usb_get_dev(dev);
1056
1057 return 0;
1058
1059 fail:
1060 for (i = 0; i < num_snd_bufs; i++)
1061 kfree(instance->send_buffers[i].base);
1062
1063 for (i = 0; i < num_snd_urbs; i++)
1064 usb_free_urb(instance->senders[i].urb);
1065
1066 for (i = 0; i < num_rcv_bufs; i++)
1067 kfree(instance->receive_buffers[i].base);
1068
1069 for (i = 0; i < num_rcv_urbs; i++)
1070 usb_free_urb(instance->receivers[i].urb);
1071
1072 return -ENOMEM;
1073}
1074
1075void udsl_instance_disconnect(struct udsl_instance_data *instance)
1076{
1077 int i;
1078
1079 dbg("udsl_instance_disconnect entered");
1080
1081 if (!instance) {
1082 dbg("udsl_instance_disconnect: NULL instance!");
1083 return;
1084 }
1085
1086 /* receive finalize */
1087 tasklet_disable(&instance->receive_tasklet);
1088
1089 for (i = 0; i < num_rcv_urbs; i++)
1090 usb_kill_urb(instance->receivers[i].urb);
1091
1092 /* no need to take the spinlock */
1093 INIT_LIST_HEAD(&instance->filled_receive_buffers);
1094 INIT_LIST_HEAD(&instance->spare_receive_buffers);
1095
1096 tasklet_enable(&instance->receive_tasklet);
1097
1098 for (i = 0; i < num_rcv_urbs; i++)
1099 usb_free_urb(instance->receivers[i].urb);
1100
1101 for (i = 0; i < num_rcv_bufs; i++)
1102 kfree(instance->receive_buffers[i].base);
1103
1104 /* send finalize */
1105 tasklet_disable(&instance->send_tasklet);
1106
1107 for (i = 0; i < num_snd_urbs; i++)
1108 usb_kill_urb(instance->senders[i].urb);
1109
1110 /* no need to take the spinlock */
1111 INIT_LIST_HEAD(&instance->spare_senders);
1112 INIT_LIST_HEAD(&instance->spare_send_buffers);
1113 instance->current_buffer = NULL;
1114
1115 tasklet_enable(&instance->send_tasklet);
1116
1117 for (i = 0; i < num_snd_urbs; i++)
1118 usb_free_urb(instance->senders[i].urb);
1119
1120 for (i = 0; i < num_snd_bufs; i++)
1121 kfree(instance->send_buffers[i].base);
1122
1123 /* ATM finalize */
1124 shutdown_atm_dev(instance->atm_dev);
1125}
1126
1127EXPORT_SYMBOL_GPL(udsl_get_instance);
1128EXPORT_SYMBOL_GPL(udsl_put_instance);
1129EXPORT_SYMBOL_GPL(udsl_instance_setup);
1130EXPORT_SYMBOL_GPL(udsl_instance_disconnect);
1131
1132/***********
1133** init **
1134***********/
1135
1136static int __init udsl_usb_init(void)
1137{
1138 dbg("udsl_usb_init: driver version " DRIVER_VERSION);
1139
1140 if (sizeof(struct udsl_control) > sizeof(((struct sk_buff *) 0)->cb)) {
1141 printk(KERN_ERR __FILE__ ": unusable with this kernel!\n");
1142 return -EIO;
1143 }
1144
1145 if ((num_rcv_urbs > UDSL_MAX_RCV_URBS)
1146 || (num_snd_urbs > UDSL_MAX_SND_URBS)
1147 || (num_rcv_bufs > UDSL_MAX_RCV_BUFS)
1148 || (num_snd_bufs > UDSL_MAX_SND_BUFS)
1149 || (rcv_buf_size > UDSL_MAX_RCV_BUF_SIZE)
1150 || (snd_buf_size > UDSL_MAX_SND_BUF_SIZE))
1151 return -EINVAL;
1152
1153 return 0;
1154}
1155
1156static void __exit udsl_usb_exit(void)
1157{
1158}
1159
1160module_init(udsl_usb_init);
1161module_exit(udsl_usb_exit);
1162
1163MODULE_AUTHOR(DRIVER_AUTHOR);
1164MODULE_DESCRIPTION(DRIVER_DESC);
1165MODULE_LICENSE("GPL");
1166MODULE_VERSION(DRIVER_VERSION);
1167
1168/************
1169** debug **
1170************/
1171
1172#ifdef VERBOSE_DEBUG
1173static int udsl_print_packet(const unsigned char *data, int len)
1174{
1175 unsigned char buffer[256];
1176 int i = 0, j = 0;
1177
1178 for (i = 0; i < len;) {
1179 buffer[0] = '\0';
1180 sprintf(buffer, "%.3d :", i);
1181 for (j = 0; (j < 16) && (i < len); j++, i++) {
1182 sprintf(buffer, "%s %2.2x", buffer, data[i]);
1183 }
1184 dbg("%s", buffer);
1185 }
1186 return i;
1187}
1188#endif
diff --git a/drivers/usb/atm/usb_atm.h b/drivers/usb/atm/usb_atm.h
deleted file mode 100644
index cf8c5328353..00000000000
--- a/drivers/usb/atm/usb_atm.h
+++ /dev/null
@@ -1,176 +0,0 @@
1/******************************************************************************
2 * usb_atm.h - 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
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#include <linux/config.h>
25#include <linux/list.h>
26#include <linux/kref.h>
27#include <linux/atm.h>
28#include <linux/atmdev.h>
29#include <asm/semaphore.h>
30
31/*
32#define DEBUG
33#define VERBOSE_DEBUG
34*/
35
36#if !defined (DEBUG) && defined (CONFIG_USB_DEBUG)
37# define DEBUG
38#endif
39
40#include <linux/usb.h>
41
42#ifdef DEBUG
43#define UDSL_ASSERT(x) BUG_ON(!(x))
44#else
45#define UDSL_ASSERT(x) do { if (!(x)) warn("failed assertion '" #x "' at line %d", __LINE__); } while(0)
46#endif
47
48#define UDSL_MAX_RCV_URBS 4
49#define UDSL_MAX_SND_URBS 4
50#define UDSL_MAX_RCV_BUFS 8
51#define UDSL_MAX_SND_BUFS 8
52#define UDSL_MAX_RCV_BUF_SIZE 1024 /* ATM cells */
53#define UDSL_MAX_SND_BUF_SIZE 1024 /* ATM cells */
54#define UDSL_DEFAULT_RCV_URBS 2
55#define UDSL_DEFAULT_SND_URBS 2
56#define UDSL_DEFAULT_RCV_BUFS 4
57#define UDSL_DEFAULT_SND_BUFS 4
58#define UDSL_DEFAULT_RCV_BUF_SIZE 64 /* ATM cells */
59#define UDSL_DEFAULT_SND_BUF_SIZE 64 /* ATM cells */
60
61#define ATM_CELL_HEADER (ATM_CELL_SIZE - ATM_CELL_PAYLOAD)
62#define UDSL_NUM_CELLS(x) (((x) + ATM_AAL5_TRAILER + ATM_CELL_PAYLOAD - 1) / ATM_CELL_PAYLOAD)
63
64/* receive */
65
66struct udsl_receive_buffer {
67 struct list_head list;
68 unsigned char *base;
69 unsigned int filled_cells;
70};
71
72struct udsl_receiver {
73 struct list_head list;
74 struct udsl_receive_buffer *buffer;
75 struct urb *urb;
76 struct udsl_instance_data *instance;
77};
78
79struct udsl_vcc_data {
80 /* vpi/vci lookup */
81 struct list_head list;
82 short vpi;
83 int vci;
84 struct atm_vcc *vcc;
85
86 /* raw cell reassembly */
87 struct sk_buff *sarb;
88};
89
90/* send */
91
92struct udsl_send_buffer {
93 struct list_head list;
94 unsigned char *base;
95 unsigned char *free_start;
96 unsigned int free_cells;
97};
98
99struct udsl_sender {
100 struct list_head list;
101 struct udsl_send_buffer *buffer;
102 struct urb *urb;
103 struct udsl_instance_data *instance;
104};
105
106struct udsl_control {
107 struct atm_skb_data atm_data;
108 unsigned int num_cells;
109 unsigned int num_entire;
110 unsigned int pdu_padding;
111 unsigned char aal5_trailer[ATM_AAL5_TRAILER];
112};
113
114#define UDSL_SKB(x) ((struct udsl_control *)(x)->cb)
115
116/* main driver data */
117
118enum udsl_status {
119 UDSL_NO_FIRMWARE,
120 UDSL_LOADING_FIRMWARE,
121 UDSL_LOADED_FIRMWARE
122};
123
124struct udsl_instance_data {
125 struct kref refcount;
126 struct semaphore serialize;
127
128 /* USB device part */
129 struct usb_device *usb_dev;
130 char description[64];
131 int data_endpoint;
132 int snd_padding;
133 int rcv_padding;
134 const char *driver_name;
135
136 /* ATM device part */
137 struct atm_dev *atm_dev;
138 struct list_head vcc_list;
139
140 /* firmware */
141 int (*firmware_wait) (struct udsl_instance_data *);
142 enum udsl_status status;
143 wait_queue_head_t firmware_waiters;
144
145 /* receive */
146 struct udsl_receiver receivers[UDSL_MAX_RCV_URBS];
147 struct udsl_receive_buffer receive_buffers[UDSL_MAX_RCV_BUFS];
148
149 spinlock_t receive_lock;
150 struct list_head spare_receivers;
151 struct list_head filled_receive_buffers;
152
153 struct tasklet_struct receive_tasklet;
154 struct list_head spare_receive_buffers;
155
156 /* send */
157 struct udsl_sender senders[UDSL_MAX_SND_URBS];
158 struct udsl_send_buffer send_buffers[UDSL_MAX_SND_BUFS];
159
160 struct sk_buff_head sndqueue;
161
162 spinlock_t send_lock;
163 struct list_head spare_senders;
164 struct list_head spare_send_buffers;
165
166 struct tasklet_struct send_tasklet;
167 struct sk_buff *current_skb; /* being emptied */
168 struct udsl_send_buffer *current_buffer; /* being filled */
169 struct list_head filled_send_buffers;
170};
171
172extern int udsl_instance_setup(struct usb_device *dev,
173 struct udsl_instance_data *instance);
174extern void udsl_instance_disconnect(struct udsl_instance_data *instance);
175extern void udsl_get_instance(struct udsl_instance_data *instance);
176extern void udsl_put_instance(struct udsl_instance_data *instance);
diff --git a/drivers/usb/atm/usbatm.c b/drivers/usb/atm/usbatm.c
new file mode 100644
index 00000000000..e134e279448
--- /dev/null
+++ b/drivers/usb/atm/usbatm.c
@@ -0,0 +1,1231 @@
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>
75#include <linux/proc_fs.h>
76#include <linux/sched.h>
77#include <linux/signal.h>
78#include <linux/slab.h>
79#include <linux/smp_lock.h>
80#include <linux/stat.h>
81#include <linux/timer.h>
82#include <linux/wait.h>
83
84#ifdef VERBOSE_DEBUG
85static int usbatm_print_packet(const unsigned char *data, int len);
86#define PACKETDEBUG(arg...) usbatm_print_packet (arg)
87#define vdbg(arg...) dbg (arg)
88#else
89#define PACKETDEBUG(arg...)
90#define vdbg(arg...)
91#endif
92
93#define DRIVER_AUTHOR "Johan Verrept, Duncan Sands <duncan.sands@free.fr>"
94#define DRIVER_VERSION "1.9"
95#define DRIVER_DESC "Generic USB ATM/DSL I/O, version " DRIVER_VERSION
96
97static const char usbatm_driver_name[] = "usbatm";
98
99#define UDSL_MAX_RCV_URBS 16
100#define UDSL_MAX_SND_URBS 16
101#define UDSL_MAX_RCV_BUF_SIZE 1024 /* ATM cells */
102#define UDSL_MAX_SND_BUF_SIZE 1024 /* ATM cells */
103#define UDSL_DEFAULT_RCV_URBS 4
104#define UDSL_DEFAULT_SND_URBS 4
105#define UDSL_DEFAULT_RCV_BUF_SIZE 64 /* ATM cells */
106#define UDSL_DEFAULT_SND_BUF_SIZE 64 /* ATM cells */
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
112static unsigned int num_rcv_urbs = UDSL_DEFAULT_RCV_URBS;
113static unsigned int num_snd_urbs = UDSL_DEFAULT_SND_URBS;
114static unsigned int rcv_buf_size = UDSL_DEFAULT_RCV_BUF_SIZE;
115static unsigned int snd_buf_size = UDSL_DEFAULT_SND_BUF_SIZE;
116
117module_param(num_rcv_urbs, uint, S_IRUGO);
118MODULE_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
123module_param(num_snd_urbs, uint, S_IRUGO);
124MODULE_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
129module_param(rcv_buf_size, uint, S_IRUGO);
130MODULE_PARM_DESC(rcv_buf_size,
131 "Size of the buffers used for reception in ATM cells (range: 1-"
132 __MODULE_STRING(UDSL_MAX_RCV_BUF_SIZE) ", default: "
133 __MODULE_STRING(UDSL_DEFAULT_RCV_BUF_SIZE) ")");
134
135module_param(snd_buf_size, uint, S_IRUGO);
136MODULE_PARM_DESC(snd_buf_size,
137 "Size of the buffers used for transmission in ATM cells (range: 1-"
138 __MODULE_STRING(UDSL_MAX_SND_BUF_SIZE) ", default: "
139 __MODULE_STRING(UDSL_DEFAULT_SND_BUF_SIZE) ")");
140
141
142/* receive */
143
144struct 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
158struct 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
169static void usbatm_atm_dev_close(struct atm_dev *dev);
170static int usbatm_atm_open(struct atm_vcc *vcc);
171static void usbatm_atm_close(struct atm_vcc *vcc);
172static int usbatm_atm_ioctl(struct atm_dev *dev, unsigned int cmd, void __user * arg);
173static int usbatm_atm_send(struct atm_vcc *vcc, struct sk_buff *skb);
174static int usbatm_atm_proc_read(struct atm_dev *atm_dev, loff_t * pos, char *page);
175
176static 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
191static 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
197static inline void usbatm_pop(struct atm_vcc *vcc, struct sk_buff *skb)
198{
199 if (vcc->pop)
200 vcc->pop(vcc, skb);
201 else
202 dev_kfree_skb(skb);
203}
204
205
206/***********
207** urbs **
208************/
209
210static inline struct urb *usbatm_pop_urb(struct usbatm_channel *channel)
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
227static inline int usbatm_submit_urb(struct urb *urb)
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) {
237 atm_dbg(channel->usbatm, "%s: urb 0x%p submission failed (%d)!\n",
238 __func__, urb, ret);
239
240 /* consider all errors transient and return the buffer back to the queue */
241 urb->status = -EAGAIN;
242 spin_lock_irq(&channel->lock);
243
244 /* must add to the front when sending; doesn't matter when receiving */
245 list_add(&urb->urb_list, &channel->list);
246
247 spin_unlock_irq(&channel->lock);
248
249 /* make sure the channel doesn't stall */
250 mod_timer(&channel->delay, jiffies + msecs_to_jiffies(THROTTLE_MSECS));
251 }
252
253 return ret;
254}
255
256static void usbatm_complete(struct urb *urb, struct pt_regs *regs)
257{
258 struct usbatm_channel *channel = urb->context;
259 unsigned long flags;
260
261 vdbg("%s: urb 0x%p, status %d, actual_length %d",
262 __func__, urb, urb->status, urb->actual_length);
263
264 /* usually in_interrupt(), but not always */
265 spin_lock_irqsave(&channel->lock, flags);
266
267 /* must add to the back when receiving; doesn't matter when sending */
268 list_add_tail(&urb->urb_list, &channel->list);
269
270 spin_unlock_irqrestore(&channel->lock, flags);
271
272 if (unlikely(urb->status))
273 /* throttle processing in case of an error */
274 mod_timer(&channel->delay, jiffies + msecs_to_jiffies(THROTTLE_MSECS));
275 else
276 tasklet_schedule(&channel->tasklet);
277}
278
279
280/*************
281** decode **
282*************/
283
284static inline struct usbatm_vcc_data *usbatm_find_vcc(struct usbatm_data *instance,
285 short vpi, int vci)
286{
287 struct usbatm_vcc_data *vcc;
288
289 list_for_each_entry(vcc, &instance->vcc_list, list)
290 if ((vcc->vci == vci) && (vcc->vpi == vpi))
291 return vcc;
292 return NULL;
293}
294
295static void usbatm_extract_cells(struct usbatm_data *instance,
296 unsigned char *source, unsigned int avail_data)
297{
298 struct usbatm_vcc_data *cached_vcc = NULL;
299 struct atm_vcc *vcc;
300 struct sk_buff *sarb;
301 struct usbatm_vcc_data *vcc_data;
302 unsigned int stride = instance->rx_channel.stride;
303 int vci, cached_vci = 0;
304 short vpi, cached_vpi = 0;
305 u8 pti;
306
307 for (; avail_data >= stride; avail_data -= stride, source += stride) {
308 vpi = ((source[0] & 0x0f) << 4) | (source[1] >> 4);
309 vci = ((source[1] & 0x0f) << 12) | (source[2] << 4) | (source[3] >> 4);
310 pti = ((source[3] & 0xe) >> 1);
311
312 vdbg("%s: vpi %hd, vci %d, pti %d", __func__, vpi, vci, pti);
313
314 if (cached_vcc && (vci == cached_vci) && (vpi == cached_vpi))
315 vcc_data = cached_vcc;
316 else if ((vcc_data = usbatm_find_vcc(instance, vpi, vci))) {
317 cached_vcc = vcc_data;
318 cached_vpi = vpi;
319 cached_vci = vci;
320 } else {
321 atm_dbg(instance, "%s: unknown vpi/vci (%hd/%d)!\n", __func__, vpi, vci);
322 continue;
323 }
324
325 vcc = vcc_data->vcc;
326
327 /* OAM F5 end-to-end */
328 if (pti == ATM_PTI_E2EF5) {
329 atm_warn(instance, "%s: OAM not supported (vpi %d, vci %d)!\n", __func__, vpi, vci);
330 atomic_inc(&vcc->stats->rx_err);
331 continue;
332 }
333
334 sarb = vcc_data->sarb;
335
336 if (sarb->tail + ATM_CELL_PAYLOAD > sarb->end) {
337 atm_dbg(instance, "%s: buffer overrun (sarb->len %u, vcc: 0x%p)!\n",
338 __func__, sarb->len, vcc);
339 /* discard cells already received */
340 skb_trim(sarb, 0);
341 UDSL_ASSERT(sarb->tail + ATM_CELL_PAYLOAD <= sarb->end);
342 }
343
344 memcpy(sarb->tail, source + ATM_CELL_HEADER, ATM_CELL_PAYLOAD);
345 __skb_put(sarb, ATM_CELL_PAYLOAD);
346
347 if (pti & 1) {
348 struct sk_buff *skb;
349 unsigned int length;
350 unsigned int pdu_length;
351
352 length = (source[ATM_CELL_SIZE - 6] << 8) + source[ATM_CELL_SIZE - 5];
353
354 /* guard against overflow */
355 if (length > ATM_MAX_AAL5_PDU) {
356 atm_dbg(instance, "%s: bogus length %u (vcc: 0x%p)!\n",
357 __func__, length, vcc);
358 atomic_inc(&vcc->stats->rx_err);
359 goto out;
360 }
361
362 pdu_length = usbatm_pdu_length(length);
363
364 if (sarb->len < pdu_length) {
365 atm_dbg(instance, "%s: bogus pdu_length %u (sarb->len: %u, vcc: 0x%p)!\n",
366 __func__, pdu_length, sarb->len, vcc);
367 atomic_inc(&vcc->stats->rx_err);
368 goto out;
369 }
370
371 if (crc32_be(~0, sarb->tail - pdu_length, pdu_length) != 0xc704dd7b) {
372 atm_dbg(instance, "%s: packet failed crc check (vcc: 0x%p)!\n",
373 __func__, vcc);
374 atomic_inc(&vcc->stats->rx_err);
375 goto out;
376 }
377
378 vdbg("%s: got packet (length: %u, pdu_length: %u, vcc: 0x%p)", __func__, length, pdu_length, vcc);
379
380 if (!(skb = dev_alloc_skb(length))) {
381 atm_dbg(instance, "%s: no memory for skb (length: %u)!\n", __func__, length);
382 atomic_inc(&vcc->stats->rx_drop);
383 goto out;
384 }
385
386 vdbg("%s: allocated new sk_buff (skb: 0x%p, skb->truesize: %u)", __func__, skb, skb->truesize);
387
388 if (!atm_charge(vcc, skb->truesize)) {
389 atm_dbg(instance, "%s: failed atm_charge (skb->truesize: %u)!\n", __func__, skb->truesize);
390 dev_kfree_skb(skb);
391 goto out; /* atm_charge increments rx_drop */
392 }
393
394 memcpy(skb->data, sarb->tail - pdu_length, length);
395 __skb_put(skb, length);
396
397 vdbg("%s: sending skb 0x%p, skb->len %u, skb->truesize %u",
398 __func__, skb, skb->len, skb->truesize);
399
400 PACKETDEBUG(skb->data, skb->len);
401
402 vcc->push(vcc, skb);
403
404 atomic_inc(&vcc->stats->rx);
405 out:
406 skb_trim(sarb, 0);
407 }
408 }
409}
410
411
412/*************
413** encode **
414*************/
415
416static unsigned int usbatm_write_cells(struct usbatm_data *instance,
417 struct sk_buff *skb,
418 u8 *target, unsigned int avail_space)
419{
420 struct usbatm_control *ctrl = UDSL_SKB(skb);
421 struct atm_vcc *vcc = ctrl->atm.vcc;
422 unsigned int num_written;
423 unsigned int stride = instance->tx_channel.stride;
424
425 vdbg("%s: skb->len=%d, avail_space=%u", __func__, skb->len, avail_space);
426 UDSL_ASSERT(!(avail_space % stride));
427
428 for (num_written = 0; num_written < avail_space && ctrl->len;
429 num_written += stride, target += stride) {
430 unsigned int data_len = min_t(unsigned int, skb->len, ATM_CELL_PAYLOAD);
431 unsigned int left = ATM_CELL_PAYLOAD - data_len;
432 u8 *ptr = target;
433
434 ptr[0] = vcc->vpi >> 4;
435 ptr[1] = (vcc->vpi << 4) | (vcc->vci >> 12);
436 ptr[2] = vcc->vci >> 4;
437 ptr[3] = vcc->vci << 4;
438 ptr[4] = 0xec;
439 ptr += ATM_CELL_HEADER;
440
441 memcpy(ptr, skb->data, data_len);
442 ptr += data_len;
443 __skb_pull(skb, data_len);
444
445 if(!left)
446 continue;
447
448 memset(ptr, 0, left);
449
450 if (left >= ATM_AAL5_TRAILER) { /* trailer will go in this cell */
451 u8 *trailer = target + ATM_CELL_SIZE - ATM_AAL5_TRAILER;
452 /* trailer[0] = 0; UU = 0 */
453 /* trailer[1] = 0; CPI = 0 */
454 trailer[2] = ctrl->len >> 8;
455 trailer[3] = ctrl->len;
456
457 ctrl->crc = ~ crc32_be(ctrl->crc, ptr, left - 4);
458
459 trailer[4] = ctrl->crc >> 24;
460 trailer[5] = ctrl->crc >> 16;
461 trailer[6] = ctrl->crc >> 8;
462 trailer[7] = ctrl->crc;
463
464 target[3] |= 0x2; /* adjust PTI */
465
466 ctrl->len = 0; /* tag this skb finished */
467 }
468 else
469 ctrl->crc = crc32_be(ctrl->crc, ptr, left);
470 }
471
472 return num_written;
473}
474
475
476/**************
477** receive **
478**************/
479
480static void usbatm_rx_process(unsigned long data)
481{
482 struct usbatm_data *instance = (struct usbatm_data *)data;
483 struct urb *urb;
484
485 while ((urb = usbatm_pop_urb(&instance->rx_channel))) {
486 vdbg("%s: processing urb 0x%p", __func__, urb);
487
488 if (usb_pipeisoc(urb->pipe)) {
489 int i;
490 for (i = 0; i < urb->number_of_packets; i++)
491 if (!urb->iso_frame_desc[i].status)
492 usbatm_extract_cells(instance,
493 (u8 *)urb->transfer_buffer + urb->iso_frame_desc[i].offset,
494 urb->iso_frame_desc[i].actual_length);
495 }
496 else
497 if (!urb->status)
498 usbatm_extract_cells(instance, urb->transfer_buffer, urb->actual_length);
499
500 if (usbatm_submit_urb(urb))
501 return;
502 }
503}
504
505
506/***********
507** send **
508***********/
509
510static void usbatm_tx_process(unsigned long data)
511{
512 struct usbatm_data *instance = (struct usbatm_data *)data;
513 struct sk_buff *skb = instance->current_skb;
514 struct urb *urb = NULL;
515 const unsigned int buf_size = instance->tx_channel.buf_size;
516 unsigned int num_written = 0;
517 u8 *buffer = NULL;
518
519 if (!skb)
520 skb = skb_dequeue(&instance->sndqueue);
521
522 while (skb) {
523 if (!urb) {
524 urb = usbatm_pop_urb(&instance->tx_channel);
525 if (!urb)
526 break; /* no more senders */
527 buffer = urb->transfer_buffer;
528 num_written = (urb->status == -EAGAIN) ?
529 urb->transfer_buffer_length : 0;
530 }
531
532 num_written += usbatm_write_cells(instance, skb,
533 buffer + num_written,
534 buf_size - num_written);
535
536 vdbg("%s: wrote %u bytes from skb 0x%p to urb 0x%p",
537 __func__, num_written, skb, urb);
538
539 if (!UDSL_SKB(skb)->len) {
540 struct atm_vcc *vcc = UDSL_SKB(skb)->atm.vcc;
541
542 usbatm_pop(vcc, skb);
543 atomic_inc(&vcc->stats->tx);
544
545 skb = skb_dequeue(&instance->sndqueue);
546 }
547
548 if (num_written == buf_size || (!skb && num_written)) {
549 urb->transfer_buffer_length = num_written;
550
551 if (usbatm_submit_urb(urb))
552 break;
553 urb = NULL;
554 }
555 }
556
557 instance->current_skb = skb;
558}
559
560static void usbatm_cancel_send(struct usbatm_data *instance,
561 struct atm_vcc *vcc)
562{
563 struct sk_buff *skb, *n;
564
565 atm_dbg(instance, "%s entered\n", __func__);
566 spin_lock_irq(&instance->sndqueue.lock);
567 for (skb = instance->sndqueue.next, n = skb->next;
568 skb != (struct sk_buff *)&instance->sndqueue;
569 skb = n, n = skb->next)
570 if (UDSL_SKB(skb)->atm.vcc == vcc) {
571 atm_dbg(instance, "%s: popping skb 0x%p\n", __func__, skb);
572 __skb_unlink(skb, &instance->sndqueue);
573 usbatm_pop(vcc, skb);
574 }
575 spin_unlock_irq(&instance->sndqueue.lock);
576
577 tasklet_disable(&instance->tx_channel.tasklet);
578 if ((skb = instance->current_skb) && (UDSL_SKB(skb)->atm.vcc == vcc)) {
579 atm_dbg(instance, "%s: popping current skb (0x%p)\n", __func__, skb);
580 instance->current_skb = NULL;
581 usbatm_pop(vcc, skb);
582 }
583 tasklet_enable(&instance->tx_channel.tasklet);
584 atm_dbg(instance, "%s done\n", __func__);
585}
586
587static int usbatm_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
588{
589 struct usbatm_data *instance = vcc->dev->dev_data;
590 struct usbatm_control *ctrl = UDSL_SKB(skb);
591 int err;
592
593 vdbg("%s called (skb 0x%p, len %u)", __func__, skb, skb->len);
594
595 if (!instance) {
596 dbg("%s: NULL data!", __func__);
597 err = -ENODEV;
598 goto fail;
599 }
600
601 if (vcc->qos.aal != ATM_AAL5) {
602 atm_dbg(instance, "%s: unsupported ATM type %d!\n", __func__, vcc->qos.aal);
603 err = -EINVAL;
604 goto fail;
605 }
606
607 if (skb->len > ATM_MAX_AAL5_PDU) {
608 atm_dbg(instance, "%s: packet too long (%d vs %d)!\n",
609 __func__, skb->len, ATM_MAX_AAL5_PDU);
610 err = -EINVAL;
611 goto fail;
612 }
613
614 PACKETDEBUG(skb->data, skb->len);
615
616 /* initialize the control block */
617 ctrl->atm.vcc = vcc;
618 ctrl->len = skb->len;
619 ctrl->crc = crc32_be(~0, skb->data, skb->len);
620
621 skb_queue_tail(&instance->sndqueue, skb);
622 tasklet_schedule(&instance->tx_channel.tasklet);
623
624 return 0;
625
626 fail:
627 usbatm_pop(vcc, skb);
628 return err;
629}
630
631
632/********************
633** bean counting **
634********************/
635
636static void usbatm_destroy_instance(struct kref *kref)
637{
638 struct usbatm_data *instance = container_of(kref, struct usbatm_data, refcount);
639
640 dbg("%s", __func__);
641
642 tasklet_kill(&instance->rx_channel.tasklet);
643 tasklet_kill(&instance->tx_channel.tasklet);
644 usb_put_dev(instance->usb_dev);
645 kfree(instance);
646}
647
648void usbatm_get_instance(struct usbatm_data *instance)
649{
650 dbg("%s", __func__);
651
652 kref_get(&instance->refcount);
653}
654
655void usbatm_put_instance(struct usbatm_data *instance)
656{
657 dbg("%s", __func__);
658
659 kref_put(&instance->refcount, usbatm_destroy_instance);
660}
661
662
663/**********
664** ATM **
665**********/
666
667static void usbatm_atm_dev_close(struct atm_dev *dev)
668{
669 struct usbatm_data *instance = dev->dev_data;
670
671 dbg("%s", __func__);
672
673 if (!instance)
674 return;
675
676 dev->dev_data = NULL;
677 usbatm_put_instance(instance); /* taken in usbatm_atm_init */
678}
679
680static int usbatm_atm_proc_read(struct atm_dev *atm_dev, loff_t * pos, char *page)
681{
682 struct usbatm_data *instance = atm_dev->dev_data;
683 int left = *pos;
684
685 if (!instance) {
686 dbg("%s: NULL instance!", __func__);
687 return -ENODEV;
688 }
689
690 if (!left--)
691 return sprintf(page, "%s\n", instance->description);
692
693 if (!left--)
694 return sprintf(page, "MAC: %02x:%02x:%02x:%02x:%02x:%02x\n",
695 atm_dev->esi[0], atm_dev->esi[1],
696 atm_dev->esi[2], atm_dev->esi[3],
697 atm_dev->esi[4], atm_dev->esi[5]);
698
699 if (!left--)
700 return sprintf(page,
701 "AAL5: tx %d ( %d err ), rx %d ( %d err, %d drop )\n",
702 atomic_read(&atm_dev->stats.aal5.tx),
703 atomic_read(&atm_dev->stats.aal5.tx_err),
704 atomic_read(&atm_dev->stats.aal5.rx),
705 atomic_read(&atm_dev->stats.aal5.rx_err),
706 atomic_read(&atm_dev->stats.aal5.rx_drop));
707
708 if (!left--)
709 switch (atm_dev->signal) {
710 case ATM_PHY_SIG_FOUND:
711 return sprintf(page, "Line up\n");
712 case ATM_PHY_SIG_LOST:
713 return sprintf(page, "Line down\n");
714 default:
715 return sprintf(page, "Line state unknown\n");
716 }
717
718 return 0;
719}
720
721static int usbatm_atm_open(struct atm_vcc *vcc)
722{
723 struct usbatm_data *instance = vcc->dev->dev_data;
724 struct usbatm_vcc_data *new = NULL;
725 int ret;
726 int vci = vcc->vci;
727 short vpi = vcc->vpi;
728
729 if (!instance) {
730 dbg("%s: NULL data!", __func__);
731 return -ENODEV;
732 }
733
734 atm_dbg(instance, "%s: vpi %hd, vci %d\n", __func__, vpi, vci);
735
736 /* only support AAL5 */
737 if ((vcc->qos.aal != ATM_AAL5) || (vcc->qos.rxtp.max_sdu < 0)
738 || (vcc->qos.rxtp.max_sdu > ATM_MAX_AAL5_PDU)) {
739 atm_dbg(instance, "%s: unsupported ATM type %d!\n", __func__, vcc->qos.aal);
740 return -EINVAL;
741 }
742
743 down(&instance->serialize); /* vs self, usbatm_atm_close */
744
745 if (usbatm_find_vcc(instance, vpi, vci)) {
746 atm_dbg(instance, "%s: %hd/%d already in use!\n", __func__, vpi, vci);
747 ret = -EADDRINUSE;
748 goto fail;
749 }
750
751 if (!(new = kmalloc(sizeof(struct usbatm_vcc_data), GFP_KERNEL))) {
752 atm_dbg(instance, "%s: no memory for vcc_data!\n", __func__);
753 ret = -ENOMEM;
754 goto fail;
755 }
756
757 memset(new, 0, sizeof(struct usbatm_vcc_data));
758 new->vcc = vcc;
759 new->vpi = vpi;
760 new->vci = vci;
761
762 new->sarb = alloc_skb(usbatm_pdu_length(vcc->qos.rxtp.max_sdu), GFP_KERNEL);
763 if (!new->sarb) {
764 atm_dbg(instance, "%s: no memory for SAR buffer!\n", __func__);
765 ret = -ENOMEM;
766 goto fail;
767 }
768
769 vcc->dev_data = new;
770
771 tasklet_disable(&instance->rx_channel.tasklet);
772 list_add(&new->list, &instance->vcc_list);
773 tasklet_enable(&instance->rx_channel.tasklet);
774
775 set_bit(ATM_VF_ADDR, &vcc->flags);
776 set_bit(ATM_VF_PARTIAL, &vcc->flags);
777 set_bit(ATM_VF_READY, &vcc->flags);
778
779 up(&instance->serialize);
780
781 atm_dbg(instance, "%s: allocated vcc data 0x%p\n", __func__, new);
782
783 return 0;
784
785fail:
786 kfree(new);
787 up(&instance->serialize);
788 return ret;
789}
790
791static void usbatm_atm_close(struct atm_vcc *vcc)
792{
793 struct usbatm_data *instance = vcc->dev->dev_data;
794 struct usbatm_vcc_data *vcc_data = vcc->dev_data;
795
796 if (!instance || !vcc_data) {
797 dbg("%s: NULL data!", __func__);
798 return;
799 }
800
801 atm_dbg(instance, "%s entered\n", __func__);
802
803 atm_dbg(instance, "%s: deallocating vcc 0x%p with vpi %d vci %d\n",
804 __func__, vcc_data, vcc_data->vpi, vcc_data->vci);
805
806 usbatm_cancel_send(instance, vcc);
807
808 down(&instance->serialize); /* vs self, usbatm_atm_open */
809
810 tasklet_disable(&instance->rx_channel.tasklet);
811 list_del(&vcc_data->list);
812 tasklet_enable(&instance->rx_channel.tasklet);
813
814 kfree_skb(vcc_data->sarb);
815 vcc_data->sarb = NULL;
816
817 kfree(vcc_data);
818 vcc->dev_data = NULL;
819
820 vcc->vpi = ATM_VPI_UNSPEC;
821 vcc->vci = ATM_VCI_UNSPEC;
822 clear_bit(ATM_VF_READY, &vcc->flags);
823 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
824 clear_bit(ATM_VF_ADDR, &vcc->flags);
825
826 up(&instance->serialize);
827
828 atm_dbg(instance, "%s successful\n", __func__);
829}
830
831static int usbatm_atm_ioctl(struct atm_dev *dev, unsigned int cmd,
832 void __user * arg)
833{
834 switch (cmd) {
835 case ATM_QUERYLOOP:
836 return put_user(ATM_LM_NONE, (int __user *)arg) ? -EFAULT : 0;
837 default:
838 return -ENOIOCTLCMD;
839 }
840}
841
842static int usbatm_atm_init(struct usbatm_data *instance)
843{
844 struct atm_dev *atm_dev;
845 int ret, i;
846
847 /* ATM init */
848 atm_dev = atm_dev_register(instance->driver_name, &usbatm_atm_devops, -1, NULL);
849 if (!atm_dev) {
850 usb_dbg(instance, "%s: failed to register ATM device!\n", __func__);
851 return -1;
852 }
853
854 instance->atm_dev = atm_dev;
855
856 atm_dev->ci_range.vpi_bits = ATM_CI_MAX;
857 atm_dev->ci_range.vci_bits = ATM_CI_MAX;
858 atm_dev->signal = ATM_PHY_SIG_UNKNOWN;
859
860 /* temp init ATM device, set to 128kbit */
861 atm_dev->link_rate = 128 * 1000 / 424;
862
863 if (instance->driver->atm_start && ((ret = instance->driver->atm_start(instance, atm_dev)) < 0)) {
864 atm_dbg(instance, "%s: atm_start failed: %d!\n", __func__, ret);
865 goto fail;
866 }
867
868 /* ready for ATM callbacks */
869 usbatm_get_instance(instance); /* dropped in usbatm_atm_dev_close */
870 mb();
871 atm_dev->dev_data = instance;
872
873 /* submit all rx URBs */
874 for (i = 0; i < num_rcv_urbs; i++)
875 usbatm_submit_urb(instance->urbs[i]);
876
877 return 0;
878
879 fail:
880 instance->atm_dev = NULL;
881 shutdown_atm_dev(atm_dev); /* usbatm_atm_dev_close will eventually be called */
882 return ret;
883}
884
885
886/**********
887** USB **
888**********/
889
890static int usbatm_do_heavy_init(void *arg)
891{
892 struct usbatm_data *instance = arg;
893 int ret;
894
895 daemonize(instance->driver->driver_name);
896 allow_signal(SIGTERM);
897
898 complete(&instance->thread_started);
899
900 ret = instance->driver->heavy_init(instance, instance->usb_intf);
901
902 if (!ret)
903 ret = usbatm_atm_init(instance);
904
905 down(&instance->serialize);
906 instance->thread_pid = -1;
907 up(&instance->serialize);
908
909 complete_and_exit(&instance->thread_exited, ret);
910}
911
912static int usbatm_heavy_init(struct usbatm_data *instance)
913{
914 int ret = kernel_thread(usbatm_do_heavy_init, instance, CLONE_KERNEL);
915
916 if (ret < 0) {
917 usb_dbg(instance, "%s: failed to create kernel_thread (%d)!\n", __func__, ret);
918 return ret;
919 }
920
921 down(&instance->serialize);
922 instance->thread_pid = ret;
923 up(&instance->serialize);
924
925 wait_for_completion(&instance->thread_started);
926
927 return 0;
928}
929
930static void usbatm_tasklet_schedule(unsigned long data)
931{
932 tasklet_schedule((struct tasklet_struct *) data);
933}
934
935static inline void usbatm_init_channel(struct usbatm_channel *channel)
936{
937 spin_lock_init(&channel->lock);
938 INIT_LIST_HEAD(&channel->list);
939 channel->delay.function = usbatm_tasklet_schedule;
940 channel->delay.data = (unsigned long) &channel->tasklet;
941 init_timer(&channel->delay);
942}
943
944int usbatm_usb_probe(struct usb_interface *intf, const struct usb_device_id *id,
945 struct usbatm_driver *driver)
946{
947 struct device *dev = &intf->dev;
948 struct usb_device *usb_dev = interface_to_usbdev(intf);
949 struct usbatm_data *instance;
950 char *buf;
951 int error = -ENOMEM;
952 int i, length;
953 int need_heavy;
954
955 dev_dbg(dev, "%s: trying driver %s with vendor=0x%x, product=0x%x, ifnum %d\n",
956 __func__, driver->driver_name,
957 le16_to_cpu(usb_dev->descriptor.idVendor),
958 le16_to_cpu(usb_dev->descriptor.idProduct),
959 intf->altsetting->desc.bInterfaceNumber);
960
961 /* instance init */
962 instance = kmalloc(sizeof(*instance) + sizeof(struct urb *) * (num_rcv_urbs + num_snd_urbs),
963 GFP_KERNEL);
964 if (!instance) {
965 dev_dbg(dev, "%s: no memory for instance data!\n", __func__);
966 return -ENOMEM;
967 }
968
969 memset(instance, 0, sizeof(*instance));
970
971 /* public fields */
972
973 instance->driver = driver;
974 snprintf(instance->driver_name, sizeof(instance->driver_name), driver->driver_name);
975
976 instance->usb_dev = usb_dev;
977 instance->usb_intf = intf;
978
979 buf = instance->description;
980 length = sizeof(instance->description);
981
982 if ((i = usb_string(usb_dev, usb_dev->descriptor.iProduct, buf, length)) < 0)
983 goto bind;
984
985 buf += i;
986 length -= i;
987
988 i = scnprintf(buf, length, " (");
989 buf += i;
990 length -= i;
991
992 if (length <= 0 || (i = usb_make_path(usb_dev, buf, length)) < 0)
993 goto bind;
994
995 buf += i;
996 length -= i;
997
998 snprintf(buf, length, ")");
999
1000 bind:
1001 need_heavy = 1;
1002 if (driver->bind && (error = driver->bind(instance, intf, id, &need_heavy)) < 0) {
1003 dev_dbg(dev, "%s: bind failed: %d!\n", __func__, error);
1004 goto fail_free;
1005 }
1006
1007 /* private fields */
1008
1009 kref_init(&instance->refcount); /* dropped in usbatm_usb_disconnect */
1010 init_MUTEX(&instance->serialize);
1011
1012 instance->thread_pid = -1;
1013 init_completion(&instance->thread_started);
1014 init_completion(&instance->thread_exited);
1015
1016 INIT_LIST_HEAD(&instance->vcc_list);
1017
1018 usbatm_init_channel(&instance->rx_channel);
1019 usbatm_init_channel(&instance->tx_channel);
1020 tasklet_init(&instance->rx_channel.tasklet, usbatm_rx_process, (unsigned long)instance);
1021 tasklet_init(&instance->tx_channel.tasklet, usbatm_tx_process, (unsigned long)instance);
1022 instance->rx_channel.endpoint = usb_rcvbulkpipe(usb_dev, driver->in);
1023 instance->tx_channel.endpoint = usb_sndbulkpipe(usb_dev, driver->out);
1024 instance->rx_channel.stride = ATM_CELL_SIZE + driver->rx_padding;
1025 instance->tx_channel.stride = ATM_CELL_SIZE + driver->tx_padding;
1026 instance->rx_channel.buf_size = rcv_buf_size * instance->rx_channel.stride;
1027 instance->tx_channel.buf_size = snd_buf_size * instance->tx_channel.stride;
1028 instance->rx_channel.usbatm = instance->tx_channel.usbatm = instance;
1029
1030 skb_queue_head_init(&instance->sndqueue);
1031
1032 for (i = 0; i < num_rcv_urbs + num_snd_urbs; i++) {
1033 struct urb *urb;
1034 u8 *buffer;
1035 unsigned int iso_packets = 0, iso_size = 0;
1036 struct usbatm_channel *channel = i < num_rcv_urbs ?
1037 &instance->rx_channel : &instance->tx_channel;
1038
1039 if (usb_pipeisoc(channel->endpoint)) {
1040 /* don't expect iso out endpoints */
1041 iso_size = usb_maxpacket(instance->usb_dev, channel->endpoint, 0);
1042 iso_size -= iso_size % channel->stride; /* alignment */
1043 BUG_ON(!iso_size);
1044 iso_packets = (channel->buf_size - 1) / iso_size + 1;
1045 }
1046
1047 urb = usb_alloc_urb(iso_packets, GFP_KERNEL);
1048 if (!urb) {
1049 dev_dbg(dev, "%s: no memory for urb %d!\n", __func__, i);
1050 goto fail_unbind;
1051 }
1052
1053 buffer = kmalloc(channel->buf_size, GFP_KERNEL);
1054 if (!buffer) {
1055 dev_dbg(dev, "%s: no memory for buffer %d!\n", __func__, i);
1056 goto fail_unbind;
1057 }
1058 memset(buffer, 0, channel->buf_size);
1059
1060 usb_fill_bulk_urb(urb, instance->usb_dev, channel->endpoint,
1061 buffer, channel->buf_size, usbatm_complete, channel);
1062 if (iso_packets) {
1063 int j;
1064 urb->interval = 1;
1065 urb->transfer_flags = URB_ISO_ASAP;
1066 urb->number_of_packets = iso_packets;
1067 for (j = 0; j < iso_packets; j++) {
1068 urb->iso_frame_desc[j].offset = iso_size * j;
1069 urb->iso_frame_desc[j].length = min_t(int, iso_size,
1070 channel->buf_size - urb->iso_frame_desc[j].offset);
1071 }
1072 }
1073
1074 /* put all tx URBs on the list of spares */
1075 if (i >= num_rcv_urbs)
1076 list_add_tail(&urb->urb_list, &channel->list);
1077
1078 vdbg("%s: alloced buffer 0x%p buf size %u urb 0x%p",
1079 __func__, urb->transfer_buffer, urb->transfer_buffer_length, urb);
1080 instance->urbs[i] = urb;
1081 }
1082
1083 if (need_heavy && driver->heavy_init) {
1084 error = usbatm_heavy_init(instance);
1085 } else {
1086 complete(&instance->thread_exited); /* pretend that heavy_init was run */
1087 error = usbatm_atm_init(instance);
1088 }
1089
1090 if (error < 0)
1091 goto fail_unbind;
1092
1093 usb_get_dev(usb_dev);
1094 usb_set_intfdata(intf, instance);
1095
1096 return 0;
1097
1098 fail_unbind:
1099 if (instance->driver->unbind)
1100 instance->driver->unbind(instance, intf);
1101 fail_free:
1102 for (i = 0; i < num_rcv_urbs + num_snd_urbs; i++) {
1103 if (instance->urbs[i])
1104 kfree(instance->urbs[i]->transfer_buffer);
1105 usb_free_urb(instance->urbs[i]);
1106 }
1107
1108 kfree (instance);
1109
1110 return error;
1111}
1112EXPORT_SYMBOL_GPL(usbatm_usb_probe);
1113
1114void usbatm_usb_disconnect(struct usb_interface *intf)
1115{
1116 struct device *dev = &intf->dev;
1117 struct usbatm_data *instance = usb_get_intfdata(intf);
1118 int i;
1119
1120 dev_dbg(dev, "%s entered\n", __func__);
1121
1122 if (!instance) {
1123 dev_dbg(dev, "%s: NULL instance!\n", __func__);
1124 return;
1125 }
1126
1127 usb_set_intfdata(intf, NULL);
1128
1129 down(&instance->serialize);
1130 if (instance->thread_pid >= 0)
1131 kill_proc(instance->thread_pid, SIGTERM, 1);
1132 up(&instance->serialize);
1133
1134 wait_for_completion(&instance->thread_exited);
1135
1136 tasklet_disable(&instance->rx_channel.tasklet);
1137 tasklet_disable(&instance->tx_channel.tasklet);
1138
1139 for (i = 0; i < num_rcv_urbs + num_snd_urbs; i++)
1140 usb_kill_urb(instance->urbs[i]);
1141
1142 del_timer_sync(&instance->rx_channel.delay);
1143 del_timer_sync(&instance->tx_channel.delay);
1144
1145 if (instance->atm_dev && instance->driver->atm_stop)
1146 instance->driver->atm_stop(instance, instance->atm_dev);
1147
1148 if (instance->driver->unbind)
1149 instance->driver->unbind(instance, intf);
1150
1151 instance->driver_data = NULL;
1152
1153 /* turn usbatm_[rt]x_process into noop */
1154 /* no need to take the spinlock */
1155 INIT_LIST_HEAD(&instance->rx_channel.list);
1156 INIT_LIST_HEAD(&instance->tx_channel.list);
1157
1158 tasklet_enable(&instance->rx_channel.tasklet);
1159 tasklet_enable(&instance->tx_channel.tasklet);
1160
1161 for (i = 0; i < num_rcv_urbs + num_snd_urbs; i++) {
1162 kfree(instance->urbs[i]->transfer_buffer);
1163 usb_free_urb(instance->urbs[i]);
1164 }
1165
1166 /* ATM finalize */
1167 if (instance->atm_dev)
1168 shutdown_atm_dev(instance->atm_dev);
1169
1170 usbatm_put_instance(instance); /* taken in usbatm_usb_probe */
1171}
1172EXPORT_SYMBOL_GPL(usbatm_usb_disconnect);
1173
1174
1175/***********
1176** init **
1177***********/
1178
1179static int __init usbatm_usb_init(void)
1180{
1181 dbg("%s: driver version %s", __func__, DRIVER_VERSION);
1182
1183 if (sizeof(struct usbatm_control) > sizeof(((struct sk_buff *) 0)->cb)) {
1184 printk(KERN_ERR "%s unusable with this kernel!\n", usbatm_driver_name);
1185 return -EIO;
1186 }
1187
1188 if ((num_rcv_urbs > UDSL_MAX_RCV_URBS)
1189 || (num_snd_urbs > UDSL_MAX_SND_URBS)
1190 || (rcv_buf_size < 1)
1191 || (rcv_buf_size > UDSL_MAX_RCV_BUF_SIZE)
1192 || (snd_buf_size < 1)
1193 || (snd_buf_size > UDSL_MAX_SND_BUF_SIZE))
1194 return -EINVAL;
1195
1196 return 0;
1197}
1198module_init(usbatm_usb_init);
1199
1200static void __exit usbatm_usb_exit(void)
1201{
1202 dbg("%s", __func__);
1203}
1204module_exit(usbatm_usb_exit);
1205
1206MODULE_AUTHOR(DRIVER_AUTHOR);
1207MODULE_DESCRIPTION(DRIVER_DESC);
1208MODULE_LICENSE("GPL");
1209MODULE_VERSION(DRIVER_VERSION);
1210
1211/************
1212** debug **
1213************/
1214
1215#ifdef VERBOSE_DEBUG
1216static int usbatm_print_packet(const unsigned char *data, int len)
1217{
1218 unsigned char buffer[256];
1219 int i = 0, j = 0;
1220
1221 for (i = 0; i < len;) {
1222 buffer[0] = '\0';
1223 sprintf(buffer, "%.3d :", i);
1224 for (j = 0; (j < 16) && (i < len); j++, i++) {
1225 sprintf(buffer, "%s %2.2x", buffer, data[i]);
1226 }
1227 dbg("%s", buffer);
1228 }
1229 return i;
1230}
1231#endif
diff --git a/drivers/usb/atm/usbatm.h b/drivers/usb/atm/usbatm.h
new file mode 100644
index 00000000000..2239804453c
--- /dev/null
+++ b/drivers/usb/atm/usbatm.h
@@ -0,0 +1,183 @@
1/******************************************************************************
2 * usbatm.h - 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
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#ifndef _USBATM_H_
25#define _USBATM_H_
26
27#include <linux/config.h>
28
29/*
30#define DEBUG
31#define VERBOSE_DEBUG
32*/
33
34#if !defined (DEBUG) && defined (CONFIG_USB_DEBUG)
35# define DEBUG
36#endif
37
38#include <asm/semaphore.h>
39#include <linux/atm.h>
40#include <linux/atmdev.h>
41#include <linux/completion.h>
42#include <linux/device.h>
43#include <linux/kref.h>
44#include <linux/list.h>
45#include <linux/stringify.h>
46#include <linux/usb.h>
47
48#ifdef DEBUG
49#define UDSL_ASSERT(x) BUG_ON(!(x))
50#else
51#define UDSL_ASSERT(x) do { if (!(x)) warn("failed assertion '%s' at line %d", __stringify(x), __LINE__); } while(0)
52#endif
53
54#define usb_err(instance, format, arg...) \
55 dev_err(&(instance)->usb_intf->dev , format , ## arg)
56#define usb_info(instance, format, arg...) \
57 dev_info(&(instance)->usb_intf->dev , format , ## arg)
58#define usb_warn(instance, format, arg...) \
59 dev_warn(&(instance)->usb_intf->dev , format , ## arg)
60#define usb_dbg(instance, format, arg...) \
61 dev_dbg(&(instance)->usb_intf->dev , format , ## arg)
62
63/* FIXME: move to dev_* once ATM is driver model aware */
64#define atm_printk(level, instance, format, arg...) \
65 printk(level "ATM dev %d: " format , (instance)->atm_dev->number, ## arg)
66
67#define atm_err(instance, format, arg...) \
68 atm_printk(KERN_ERR, instance , format , ## arg)
69#define atm_info(instance, format, arg...) \
70 atm_printk(KERN_INFO, instance , format , ## arg)
71#define atm_warn(instance, format, arg...) \
72 atm_printk(KERN_WARNING, instance , format , ## arg)
73#ifdef DEBUG
74#define atm_dbg(instance, format, arg...) \
75 atm_printk(KERN_DEBUG, instance , format , ## arg)
76#else
77#define atm_dbg(instance, format, arg...) \
78 do {} while (0)
79#endif
80
81
82/* mini driver */
83
84struct usbatm_data;
85
86/*
87* Assuming all methods exist and succeed, they are called in this order:
88*
89* bind, heavy_init, atm_start, ..., atm_stop, unbind
90*/
91
92struct usbatm_driver {
93 struct module *owner;
94
95 const char *driver_name;
96
97 /*
98 * init device ... can sleep, or cause probe() failure. Drivers with a heavy_init
99 * method can avoid having it called by setting need_heavy_init to zero.
100 */
101 int (*bind) (struct usbatm_data *, struct usb_interface *,
102 const struct usb_device_id *id, int *need_heavy_init);
103
104 /* additional device initialization that is too slow to be done in probe() */
105 int (*heavy_init) (struct usbatm_data *, struct usb_interface *);
106
107 /* cleanup device ... can sleep, but can't fail */
108 void (*unbind) (struct usbatm_data *, struct usb_interface *);
109
110 /* init ATM device ... can sleep, or cause ATM initialization failure */
111 int (*atm_start) (struct usbatm_data *, struct atm_dev *);
112
113 /* cleanup ATM device ... can sleep, but can't fail */
114 void (*atm_stop) (struct usbatm_data *, struct atm_dev *);
115
116 int in; /* rx endpoint */
117 int out; /* tx endpoint */
118
119 unsigned rx_padding;
120 unsigned tx_padding;
121};
122
123extern int usbatm_usb_probe(struct usb_interface *intf, const struct usb_device_id *id,
124 struct usbatm_driver *driver);
125extern void usbatm_usb_disconnect(struct usb_interface *intf);
126
127
128struct usbatm_channel {
129 int endpoint; /* usb pipe */
130 unsigned int stride; /* ATM cell size + padding */
131 unsigned int buf_size; /* urb buffer size */
132 spinlock_t lock;
133 struct list_head list;
134 struct tasklet_struct tasklet;
135 struct timer_list delay;
136 struct usbatm_data *usbatm;
137};
138
139/* main driver data */
140
141struct usbatm_data {
142 /******************
143 * public fields *
144 ******************/
145
146 /* mini driver */
147 struct usbatm_driver *driver;
148 void *driver_data;
149 char driver_name[16];
150
151 /* USB device */
152 struct usb_device *usb_dev;
153 struct usb_interface *usb_intf;
154 char description[64];
155
156 /* ATM device */
157 struct atm_dev *atm_dev;
158
159 /********************************
160 * private fields - do not use *
161 ********************************/
162
163 struct kref refcount;
164 struct semaphore serialize;
165
166 /* heavy init */
167 int thread_pid;
168 struct completion thread_started;
169 struct completion thread_exited;
170
171 /* ATM device */
172 struct list_head vcc_list;
173
174 struct usbatm_channel rx_channel;
175 struct usbatm_channel tx_channel;
176
177 struct sk_buff_head sndqueue;
178 struct sk_buff *current_skb; /* being emptied */
179
180 struct urb *urbs[0];
181};
182
183#endif /* _USBATM_H_ */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-20 17:32:55 -0500