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19a15b93 KH |
1 | /* -*- c-basic-offset: 8 -*- |
2 | * | |
3 | * fw-device-cdev.c - Char device for device raw access | |
4 | * | |
5 | * Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software Foundation, | |
19 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
20 | */ | |
21 | ||
22 | #include <linux/module.h> | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/wait.h> | |
25 | #include <linux/errno.h> | |
26 | #include <linux/device.h> | |
27 | #include <linux/vmalloc.h> | |
28 | #include <linux/poll.h> | |
29 | #include <linux/delay.h> | |
30 | #include <linux/mm.h> | |
a3aca3da | 31 | #include <linux/idr.h> |
19a15b93 KH |
32 | #include <linux/compat.h> |
33 | #include <asm/uaccess.h> | |
34 | #include "fw-transaction.h" | |
35 | #include "fw-topology.h" | |
36 | #include "fw-device.h" | |
37 | #include "fw-device-cdev.h" | |
38 | ||
39 | /* | |
40 | * todo | |
41 | * | |
42 | * - bus resets sends a new packet with new generation and node id | |
43 | * | |
44 | */ | |
45 | ||
46 | /* dequeue_event() just kfree()'s the event, so the event has to be | |
47 | * the first field in the struct. */ | |
48 | ||
49 | struct event { | |
50 | struct { void *data; size_t size; } v[2]; | |
51 | struct list_head link; | |
52 | }; | |
53 | ||
97bd9efa KH |
54 | struct bus_reset { |
55 | struct event event; | |
56 | struct fw_cdev_event_bus_reset reset; | |
57 | }; | |
58 | ||
19a15b93 KH |
59 | struct response { |
60 | struct event event; | |
61 | struct fw_transaction transaction; | |
62 | struct client *client; | |
28cf6a04 | 63 | struct list_head link; |
19a15b93 KH |
64 | struct fw_cdev_event_response response; |
65 | }; | |
66 | ||
67 | struct iso_interrupt { | |
68 | struct event event; | |
69 | struct fw_cdev_event_iso_interrupt interrupt; | |
70 | }; | |
71 | ||
72 | struct client { | |
344bbc4d | 73 | u32 version; |
19a15b93 KH |
74 | struct fw_device *device; |
75 | spinlock_t lock; | |
76 | struct list_head handler_list; | |
77 | struct list_head request_list; | |
28cf6a04 | 78 | struct list_head transaction_list; |
19a15b93 KH |
79 | u32 request_serial; |
80 | struct list_head event_list; | |
19a15b93 | 81 | wait_queue_head_t wait; |
9aad8125 | 82 | |
19a15b93 | 83 | struct fw_iso_context *iso_context; |
9aad8125 KH |
84 | struct fw_iso_buffer buffer; |
85 | unsigned long vm_start; | |
97bd9efa KH |
86 | |
87 | struct list_head link; | |
19a15b93 KH |
88 | }; |
89 | ||
90 | static inline void __user * | |
91 | u64_to_uptr(__u64 value) | |
92 | { | |
93 | return (void __user *)(unsigned long)value; | |
94 | } | |
95 | ||
96 | static inline __u64 | |
97 | uptr_to_u64(void __user *ptr) | |
98 | { | |
99 | return (__u64)(unsigned long)ptr; | |
100 | } | |
101 | ||
102 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
103 | { | |
104 | struct fw_device *device; | |
105 | struct client *client; | |
97bd9efa | 106 | unsigned long flags; |
19a15b93 | 107 | |
a3aca3da KH |
108 | device = fw_device_from_devt(inode->i_rdev); |
109 | if (device == NULL) | |
110 | return -ENODEV; | |
19a15b93 KH |
111 | |
112 | client = kzalloc(sizeof *client, GFP_KERNEL); | |
113 | if (client == NULL) | |
114 | return -ENOMEM; | |
115 | ||
116 | client->device = fw_device_get(device); | |
117 | INIT_LIST_HEAD(&client->event_list); | |
19a15b93 KH |
118 | INIT_LIST_HEAD(&client->handler_list); |
119 | INIT_LIST_HEAD(&client->request_list); | |
28cf6a04 | 120 | INIT_LIST_HEAD(&client->transaction_list); |
19a15b93 KH |
121 | spin_lock_init(&client->lock); |
122 | init_waitqueue_head(&client->wait); | |
123 | ||
124 | file->private_data = client; | |
125 | ||
97bd9efa KH |
126 | spin_lock_irqsave(&device->card->lock, flags); |
127 | list_add_tail(&client->link, &device->client_list); | |
128 | spin_unlock_irqrestore(&device->card->lock, flags); | |
129 | ||
19a15b93 KH |
130 | return 0; |
131 | } | |
132 | ||
133 | static void queue_event(struct client *client, struct event *event, | |
134 | void *data0, size_t size0, void *data1, size_t size1) | |
135 | { | |
136 | unsigned long flags; | |
137 | ||
138 | event->v[0].data = data0; | |
139 | event->v[0].size = size0; | |
140 | event->v[1].data = data1; | |
141 | event->v[1].size = size1; | |
142 | ||
143 | spin_lock_irqsave(&client->lock, flags); | |
144 | ||
145 | list_add_tail(&event->link, &client->event_list); | |
19a15b93 KH |
146 | wake_up_interruptible(&client->wait); |
147 | ||
148 | spin_unlock_irqrestore(&client->lock, flags); | |
149 | } | |
150 | ||
2603bf21 KH |
151 | static int |
152 | dequeue_event(struct client *client, char __user *buffer, size_t count) | |
19a15b93 KH |
153 | { |
154 | unsigned long flags; | |
155 | struct event *event; | |
156 | size_t size, total; | |
2603bf21 | 157 | int i, retval; |
19a15b93 | 158 | |
2603bf21 KH |
159 | retval = wait_event_interruptible(client->wait, |
160 | !list_empty(&client->event_list) || | |
161 | fw_device_is_shutdown(client->device)); | |
162 | if (retval < 0) | |
163 | return retval; | |
19a15b93 | 164 | |
2603bf21 KH |
165 | if (list_empty(&client->event_list) && |
166 | fw_device_is_shutdown(client->device)) | |
167 | return -ENODEV; | |
19a15b93 | 168 | |
2603bf21 | 169 | spin_lock_irqsave(&client->lock, flags); |
19a15b93 KH |
170 | event = container_of(client->event_list.next, struct event, link); |
171 | list_del(&event->link); | |
19a15b93 KH |
172 | spin_unlock_irqrestore(&client->lock, flags); |
173 | ||
19a15b93 KH |
174 | total = 0; |
175 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
176 | size = min(event->v[i].size, count - total); | |
2603bf21 KH |
177 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
178 | retval = -EFAULT; | |
19a15b93 | 179 | goto out; |
2603bf21 | 180 | } |
19a15b93 KH |
181 | total += size; |
182 | } | |
183 | retval = total; | |
184 | ||
185 | out: | |
186 | kfree(event); | |
187 | ||
188 | return retval; | |
189 | } | |
190 | ||
191 | static ssize_t | |
192 | fw_device_op_read(struct file *file, | |
193 | char __user *buffer, size_t count, loff_t *offset) | |
194 | { | |
195 | struct client *client = file->private_data; | |
196 | ||
197 | return dequeue_event(client, buffer, count); | |
198 | } | |
199 | ||
344bbc4d KH |
200 | static void |
201 | fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, | |
202 | struct fw_device *device) | |
203 | { | |
204 | struct fw_card *card = device->card; | |
205 | ||
206 | event->type = FW_CDEV_EVENT_BUS_RESET; | |
207 | event->node_id = device->node_id; | |
208 | event->local_node_id = card->local_node->node_id; | |
209 | event->bm_node_id = 0; /* FIXME: We don't track the BM. */ | |
210 | event->irm_node_id = card->irm_node->node_id; | |
211 | event->root_node_id = card->root_node->node_id; | |
212 | event->generation = card->generation; | |
213 | } | |
214 | ||
2603bf21 KH |
215 | static void |
216 | for_each_client(struct fw_device *device, | |
217 | void (*callback)(struct client *client)) | |
218 | { | |
219 | struct fw_card *card = device->card; | |
220 | struct client *c; | |
221 | unsigned long flags; | |
222 | ||
223 | spin_lock_irqsave(&card->lock, flags); | |
224 | ||
225 | list_for_each_entry(c, &device->client_list, link) | |
226 | callback(c); | |
227 | ||
228 | spin_unlock_irqrestore(&card->lock, flags); | |
229 | } | |
230 | ||
97bd9efa KH |
231 | static void |
232 | queue_bus_reset_event(struct client *client) | |
233 | { | |
234 | struct bus_reset *bus_reset; | |
235 | struct fw_device *device = client->device; | |
97bd9efa KH |
236 | |
237 | bus_reset = kzalloc(sizeof *bus_reset, GFP_ATOMIC); | |
238 | if (bus_reset == NULL) { | |
239 | fw_notify("Out of memory when allocating bus reset event\n"); | |
240 | return; | |
241 | } | |
242 | ||
344bbc4d | 243 | fill_bus_reset_event(&bus_reset->reset, device); |
97bd9efa KH |
244 | |
245 | queue_event(client, &bus_reset->event, | |
246 | &bus_reset->reset, sizeof bus_reset->reset, NULL, 0); | |
247 | } | |
248 | ||
249 | void fw_device_cdev_update(struct fw_device *device) | |
250 | { | |
2603bf21 KH |
251 | for_each_client(device, queue_bus_reset_event); |
252 | } | |
97bd9efa | 253 | |
2603bf21 KH |
254 | static void wake_up_client(struct client *client) |
255 | { | |
256 | wake_up_interruptible(&client->wait); | |
257 | } | |
97bd9efa | 258 | |
2603bf21 KH |
259 | void fw_device_cdev_remove(struct fw_device *device) |
260 | { | |
261 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
262 | } |
263 | ||
344bbc4d | 264 | static int ioctl_get_info(struct client *client, void __user *arg) |
19a15b93 | 265 | { |
344bbc4d KH |
266 | struct fw_cdev_get_info get_info; |
267 | struct fw_cdev_event_bus_reset bus_reset; | |
268 | ||
269 | if (copy_from_user(&get_info, arg, sizeof get_info)) | |
270 | return -EFAULT; | |
271 | ||
272 | client->version = get_info.version; | |
273 | get_info.version = FW_CDEV_VERSION; | |
274 | ||
275 | if (get_info.rom != 0) { | |
276 | void __user *uptr = u64_to_uptr(get_info.rom); | |
277 | size_t length = min(get_info.rom_length, | |
278 | client->device->config_rom_length * 4); | |
279 | ||
280 | if (copy_to_user(uptr, client->device->config_rom, length)) | |
281 | return -EFAULT; | |
282 | } | |
283 | get_info.rom_length = client->device->config_rom_length * 4; | |
284 | ||
285 | if (get_info.bus_reset != 0) { | |
286 | void __user *uptr = u64_to_uptr(get_info.bus_reset); | |
287 | ||
288 | fill_bus_reset_event(&bus_reset, client->device); | |
289 | if (copy_to_user(uptr, &bus_reset, sizeof bus_reset)) | |
290 | return -EFAULT; | |
291 | } | |
19a15b93 | 292 | |
344bbc4d | 293 | if (copy_to_user(arg, &get_info, sizeof get_info)) |
19a15b93 KH |
294 | return -EFAULT; |
295 | ||
296 | return 0; | |
297 | } | |
298 | ||
299 | static void | |
300 | complete_transaction(struct fw_card *card, int rcode, | |
301 | void *payload, size_t length, void *data) | |
302 | { | |
303 | struct response *response = data; | |
304 | struct client *client = response->client; | |
28cf6a04 | 305 | unsigned long flags; |
19a15b93 KH |
306 | |
307 | if (length < response->response.length) | |
308 | response->response.length = length; | |
309 | if (rcode == RCODE_COMPLETE) | |
310 | memcpy(response->response.data, payload, | |
311 | response->response.length); | |
312 | ||
28cf6a04 KH |
313 | spin_lock_irqsave(&client->lock, flags); |
314 | list_del(&response->link); | |
315 | spin_unlock_irqrestore(&client->lock, flags); | |
316 | ||
19a15b93 KH |
317 | response->response.type = FW_CDEV_EVENT_RESPONSE; |
318 | response->response.rcode = rcode; | |
319 | queue_event(client, &response->event, | |
320 | &response->response, sizeof response->response, | |
321 | response->response.data, response->response.length); | |
322 | } | |
323 | ||
324 | static ssize_t ioctl_send_request(struct client *client, void __user *arg) | |
325 | { | |
326 | struct fw_device *device = client->device; | |
327 | struct fw_cdev_send_request request; | |
328 | struct response *response; | |
28cf6a04 | 329 | unsigned long flags; |
19a15b93 KH |
330 | |
331 | if (copy_from_user(&request, arg, sizeof request)) | |
332 | return -EFAULT; | |
333 | ||
334 | /* What is the biggest size we'll accept, really? */ | |
335 | if (request.length > 4096) | |
336 | return -EINVAL; | |
337 | ||
338 | response = kmalloc(sizeof *response + request.length, GFP_KERNEL); | |
339 | if (response == NULL) | |
340 | return -ENOMEM; | |
341 | ||
342 | response->client = client; | |
343 | response->response.length = request.length; | |
344 | response->response.closure = request.closure; | |
345 | ||
346 | if (request.data && | |
347 | copy_from_user(response->response.data, | |
348 | u64_to_uptr(request.data), request.length)) { | |
349 | kfree(response); | |
350 | return -EFAULT; | |
351 | } | |
352 | ||
28cf6a04 KH |
353 | spin_lock_irqsave(&client->lock, flags); |
354 | list_add_tail(&response->link, &client->transaction_list); | |
355 | spin_unlock_irqrestore(&client->lock, flags); | |
356 | ||
19a15b93 | 357 | fw_send_request(device->card, &response->transaction, |
344bbc4d | 358 | request.tcode & 0x1f, |
907293d7 | 359 | device->node->node_id, |
19a15b93 KH |
360 | device->card->generation, |
361 | device->node->max_speed, | |
362 | request.offset, | |
363 | response->response.data, request.length, | |
364 | complete_transaction, response); | |
365 | ||
366 | if (request.data) | |
367 | return sizeof request + request.length; | |
368 | else | |
369 | return sizeof request; | |
370 | } | |
371 | ||
372 | struct address_handler { | |
373 | struct fw_address_handler handler; | |
374 | __u64 closure; | |
375 | struct client *client; | |
376 | struct list_head link; | |
377 | }; | |
378 | ||
379 | struct request { | |
380 | struct fw_request *request; | |
381 | void *data; | |
382 | size_t length; | |
383 | u32 serial; | |
384 | struct list_head link; | |
385 | }; | |
386 | ||
387 | struct request_event { | |
388 | struct event event; | |
389 | struct fw_cdev_event_request request; | |
390 | }; | |
391 | ||
392 | static void | |
393 | handle_request(struct fw_card *card, struct fw_request *r, | |
394 | int tcode, int destination, int source, | |
395 | int generation, int speed, | |
396 | unsigned long long offset, | |
397 | void *payload, size_t length, void *callback_data) | |
398 | { | |
399 | struct address_handler *handler = callback_data; | |
400 | struct request *request; | |
401 | struct request_event *e; | |
402 | unsigned long flags; | |
403 | struct client *client = handler->client; | |
404 | ||
405 | request = kmalloc(sizeof *request, GFP_ATOMIC); | |
406 | e = kmalloc(sizeof *e, GFP_ATOMIC); | |
407 | if (request == NULL || e == NULL) { | |
408 | kfree(request); | |
409 | kfree(e); | |
410 | fw_send_response(card, r, RCODE_CONFLICT_ERROR); | |
411 | return; | |
412 | } | |
413 | ||
414 | request->request = r; | |
415 | request->data = payload; | |
416 | request->length = length; | |
417 | ||
418 | spin_lock_irqsave(&client->lock, flags); | |
419 | request->serial = client->request_serial++; | |
420 | list_add_tail(&request->link, &client->request_list); | |
421 | spin_unlock_irqrestore(&client->lock, flags); | |
422 | ||
423 | e->request.type = FW_CDEV_EVENT_REQUEST; | |
424 | e->request.tcode = tcode; | |
425 | e->request.offset = offset; | |
426 | e->request.length = length; | |
427 | e->request.serial = request->serial; | |
428 | e->request.closure = handler->closure; | |
429 | ||
430 | queue_event(client, &e->event, | |
431 | &e->request, sizeof e->request, payload, length); | |
432 | } | |
433 | ||
434 | static int ioctl_allocate(struct client *client, void __user *arg) | |
435 | { | |
436 | struct fw_cdev_allocate request; | |
437 | struct address_handler *handler; | |
438 | unsigned long flags; | |
439 | struct fw_address_region region; | |
440 | ||
441 | if (copy_from_user(&request, arg, sizeof request)) | |
442 | return -EFAULT; | |
443 | ||
444 | handler = kmalloc(sizeof *handler, GFP_KERNEL); | |
445 | if (handler == NULL) | |
446 | return -ENOMEM; | |
447 | ||
448 | region.start = request.offset; | |
449 | region.end = request.offset + request.length; | |
450 | handler->handler.length = request.length; | |
451 | handler->handler.address_callback = handle_request; | |
452 | handler->handler.callback_data = handler; | |
453 | handler->closure = request.closure; | |
454 | handler->client = client; | |
455 | ||
456 | if (fw_core_add_address_handler(&handler->handler, ®ion) < 0) { | |
457 | kfree(handler); | |
458 | return -EBUSY; | |
459 | } | |
460 | ||
461 | spin_lock_irqsave(&client->lock, flags); | |
462 | list_add_tail(&handler->link, &client->handler_list); | |
463 | spin_unlock_irqrestore(&client->lock, flags); | |
464 | ||
465 | return 0; | |
466 | } | |
467 | ||
468 | static int ioctl_send_response(struct client *client, void __user *arg) | |
469 | { | |
470 | struct fw_cdev_send_response request; | |
471 | struct request *r; | |
472 | unsigned long flags; | |
473 | ||
474 | if (copy_from_user(&request, arg, sizeof request)) | |
475 | return -EFAULT; | |
476 | ||
477 | spin_lock_irqsave(&client->lock, flags); | |
478 | list_for_each_entry(r, &client->request_list, link) { | |
479 | if (r->serial == request.serial) { | |
480 | list_del(&r->link); | |
481 | break; | |
482 | } | |
483 | } | |
484 | spin_unlock_irqrestore(&client->lock, flags); | |
485 | ||
486 | if (&r->link == &client->request_list) | |
487 | return -EINVAL; | |
488 | ||
489 | if (request.length < r->length) | |
490 | r->length = request.length; | |
491 | if (copy_from_user(r->data, u64_to_uptr(request.data), r->length)) | |
492 | return -EFAULT; | |
493 | ||
494 | fw_send_response(client->device->card, r->request, request.rcode); | |
495 | ||
496 | kfree(r); | |
497 | ||
498 | return 0; | |
499 | } | |
500 | ||
5371842b KH |
501 | static int ioctl_initiate_bus_reset(struct client *client, void __user *arg) |
502 | { | |
503 | struct fw_cdev_initiate_bus_reset request; | |
504 | int short_reset; | |
505 | ||
506 | if (copy_from_user(&request, arg, sizeof request)) | |
507 | return -EFAULT; | |
508 | ||
509 | short_reset = (request.type == FW_CDEV_SHORT_RESET); | |
510 | ||
511 | return fw_core_initiate_bus_reset(client->device->card, short_reset); | |
512 | } | |
513 | ||
19a15b93 | 514 | static void |
9b32d5f3 KH |
515 | iso_callback(struct fw_iso_context *context, u32 cycle, |
516 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
517 | { |
518 | struct client *client = data; | |
519 | struct iso_interrupt *interrupt; | |
520 | ||
9b32d5f3 | 521 | interrupt = kzalloc(sizeof *interrupt + header_length, GFP_ATOMIC); |
19a15b93 KH |
522 | if (interrupt == NULL) |
523 | return; | |
524 | ||
525 | interrupt->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; | |
526 | interrupt->interrupt.closure = 0; | |
527 | interrupt->interrupt.cycle = cycle; | |
9b32d5f3 KH |
528 | interrupt->interrupt.header_length = header_length; |
529 | memcpy(interrupt->interrupt.header, header, header_length); | |
19a15b93 | 530 | queue_event(client, &interrupt->event, |
9b32d5f3 KH |
531 | &interrupt->interrupt, |
532 | sizeof interrupt->interrupt + header_length, NULL, 0); | |
19a15b93 KH |
533 | } |
534 | ||
535 | static int ioctl_create_iso_context(struct client *client, void __user *arg) | |
536 | { | |
537 | struct fw_cdev_create_iso_context request; | |
538 | ||
539 | if (copy_from_user(&request, arg, sizeof request)) | |
540 | return -EFAULT; | |
541 | ||
295e3feb KH |
542 | if (request.type > FW_ISO_CONTEXT_RECEIVE) |
543 | return -EINVAL; | |
544 | ||
21efb3cf KH |
545 | if (request.channel > 63) |
546 | return -EINVAL; | |
547 | ||
98b6cbe8 KH |
548 | if (request.sync > 15) |
549 | return -EINVAL; | |
550 | ||
551 | if (request.tags == 0 || request.tags > 15) | |
552 | return -EINVAL; | |
553 | ||
21efb3cf KH |
554 | if (request.speed > SCODE_3200) |
555 | return -EINVAL; | |
556 | ||
19a15b93 | 557 | client->iso_context = fw_iso_context_create(client->device->card, |
295e3feb | 558 | request.type, |
21efb3cf KH |
559 | request.channel, |
560 | request.speed, | |
295e3feb | 561 | request.header_size, |
98b6cbe8 KH |
562 | request.sync, |
563 | request.tags, | |
19a15b93 KH |
564 | iso_callback, client); |
565 | if (IS_ERR(client->iso_context)) | |
566 | return PTR_ERR(client->iso_context); | |
567 | ||
568 | return 0; | |
569 | } | |
570 | ||
571 | static int ioctl_queue_iso(struct client *client, void __user *arg) | |
572 | { | |
573 | struct fw_cdev_queue_iso request; | |
574 | struct fw_cdev_iso_packet __user *p, *end, *next; | |
9b32d5f3 | 575 | struct fw_iso_context *ctx = client->iso_context; |
295e3feb | 576 | unsigned long payload, payload_end, header_length; |
19a15b93 KH |
577 | int count; |
578 | struct { | |
579 | struct fw_iso_packet packet; | |
580 | u8 header[256]; | |
581 | } u; | |
582 | ||
9b32d5f3 | 583 | if (ctx == NULL) |
19a15b93 KH |
584 | return -EINVAL; |
585 | if (copy_from_user(&request, arg, sizeof request)) | |
586 | return -EFAULT; | |
587 | ||
588 | /* If the user passes a non-NULL data pointer, has mmap()'ed | |
589 | * the iso buffer, and the pointer points inside the buffer, | |
590 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 591 | * set them both to 0, which will still let packets with |
19a15b93 KH |
592 | * payload_length == 0 through. In other words, if no packets |
593 | * use the indirect payload, the iso buffer need not be mapped | |
594 | * and the request.data pointer is ignored.*/ | |
595 | ||
9aad8125 KH |
596 | payload = (unsigned long)request.data - client->vm_start; |
597 | payload_end = payload + (client->buffer.page_count << PAGE_SHIFT); | |
598 | if (request.data == 0 || client->buffer.pages == NULL || | |
599 | payload >= payload_end) { | |
600 | payload = 0; | |
601 | payload_end = 0; | |
19a15b93 KH |
602 | } |
603 | ||
604 | if (!access_ok(VERIFY_READ, request.packets, request.size)) | |
605 | return -EFAULT; | |
606 | ||
607 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(request.packets); | |
608 | end = (void __user *)p + request.size; | |
609 | count = 0; | |
610 | while (p < end) { | |
611 | if (__copy_from_user(&u.packet, p, sizeof *p)) | |
612 | return -EFAULT; | |
295e3feb | 613 | |
9b32d5f3 | 614 | if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) { |
295e3feb KH |
615 | header_length = u.packet.header_length; |
616 | } else { | |
617 | /* We require that header_length is a multiple of | |
618 | * the fixed header size, ctx->header_size */ | |
9b32d5f3 KH |
619 | if (ctx->header_size == 0) { |
620 | if (u.packet.header_length > 0) | |
621 | return -EINVAL; | |
622 | } else if (u.packet.header_length % ctx->header_size != 0) { | |
295e3feb | 623 | return -EINVAL; |
9b32d5f3 | 624 | } |
295e3feb KH |
625 | header_length = 0; |
626 | } | |
627 | ||
19a15b93 | 628 | next = (struct fw_cdev_iso_packet __user *) |
295e3feb | 629 | &p->header[header_length / 4]; |
19a15b93 KH |
630 | if (next > end) |
631 | return -EINVAL; | |
632 | if (__copy_from_user | |
295e3feb | 633 | (u.packet.header, p->header, header_length)) |
19a15b93 | 634 | return -EFAULT; |
98b6cbe8 | 635 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
636 | u.packet.header_length + u.packet.payload_length > 0) |
637 | return -EINVAL; | |
638 | if (payload + u.packet.payload_length > payload_end) | |
639 | return -EINVAL; | |
640 | ||
9b32d5f3 KH |
641 | if (fw_iso_context_queue(ctx, &u.packet, |
642 | &client->buffer, payload)) | |
19a15b93 KH |
643 | break; |
644 | ||
645 | p = next; | |
646 | payload += u.packet.payload_length; | |
647 | count++; | |
648 | } | |
649 | ||
650 | request.size -= uptr_to_u64(p) - request.packets; | |
651 | request.packets = uptr_to_u64(p); | |
9aad8125 | 652 | request.data = client->vm_start + payload; |
19a15b93 KH |
653 | |
654 | if (copy_to_user(arg, &request, sizeof request)) | |
655 | return -EFAULT; | |
656 | ||
657 | return count; | |
658 | } | |
659 | ||
69cdb726 | 660 | static int ioctl_start_iso(struct client *client, void __user *arg) |
19a15b93 | 661 | { |
69cdb726 | 662 | struct fw_cdev_start_iso request; |
19a15b93 KH |
663 | |
664 | if (copy_from_user(&request, arg, sizeof request)) | |
665 | return -EFAULT; | |
666 | ||
21efb3cf | 667 | return fw_iso_context_start(client->iso_context, request.cycle); |
19a15b93 KH |
668 | } |
669 | ||
b8295668 KH |
670 | static int ioctl_stop_iso(struct client *client, void __user *arg) |
671 | { | |
672 | return fw_iso_context_stop(client->iso_context); | |
673 | } | |
674 | ||
19a15b93 KH |
675 | static int |
676 | dispatch_ioctl(struct client *client, unsigned int cmd, void __user *arg) | |
677 | { | |
678 | switch (cmd) { | |
344bbc4d KH |
679 | case FW_CDEV_IOC_GET_INFO: |
680 | return ioctl_get_info(client, arg); | |
19a15b93 KH |
681 | case FW_CDEV_IOC_SEND_REQUEST: |
682 | return ioctl_send_request(client, arg); | |
683 | case FW_CDEV_IOC_ALLOCATE: | |
684 | return ioctl_allocate(client, arg); | |
685 | case FW_CDEV_IOC_SEND_RESPONSE: | |
686 | return ioctl_send_response(client, arg); | |
5371842b KH |
687 | case FW_CDEV_IOC_INITIATE_BUS_RESET: |
688 | return ioctl_initiate_bus_reset(client, arg); | |
19a15b93 KH |
689 | case FW_CDEV_IOC_CREATE_ISO_CONTEXT: |
690 | return ioctl_create_iso_context(client, arg); | |
691 | case FW_CDEV_IOC_QUEUE_ISO: | |
692 | return ioctl_queue_iso(client, arg); | |
69cdb726 KH |
693 | case FW_CDEV_IOC_START_ISO: |
694 | return ioctl_start_iso(client, arg); | |
b8295668 KH |
695 | case FW_CDEV_IOC_STOP_ISO: |
696 | return ioctl_stop_iso(client, arg); | |
19a15b93 KH |
697 | default: |
698 | return -EINVAL; | |
699 | } | |
700 | } | |
701 | ||
702 | static long | |
703 | fw_device_op_ioctl(struct file *file, | |
704 | unsigned int cmd, unsigned long arg) | |
705 | { | |
706 | struct client *client = file->private_data; | |
707 | ||
708 | return dispatch_ioctl(client, cmd, (void __user *) arg); | |
709 | } | |
710 | ||
711 | #ifdef CONFIG_COMPAT | |
712 | static long | |
713 | fw_device_op_compat_ioctl(struct file *file, | |
714 | unsigned int cmd, unsigned long arg) | |
715 | { | |
716 | struct client *client = file->private_data; | |
717 | ||
718 | return dispatch_ioctl(client, cmd, compat_ptr(arg)); | |
719 | } | |
720 | #endif | |
721 | ||
722 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
723 | { | |
724 | struct client *client = file->private_data; | |
9aad8125 KH |
725 | enum dma_data_direction direction; |
726 | unsigned long size; | |
727 | int page_count, retval; | |
728 | ||
729 | /* FIXME: We could support multiple buffers, but we don't. */ | |
730 | if (client->buffer.pages != NULL) | |
731 | return -EBUSY; | |
732 | ||
733 | if (!(vma->vm_flags & VM_SHARED)) | |
734 | return -EINVAL; | |
19a15b93 | 735 | |
9aad8125 | 736 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
737 | return -EINVAL; |
738 | ||
739 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
740 | size = vma->vm_end - vma->vm_start; |
741 | page_count = size >> PAGE_SHIFT; | |
742 | if (size & ~PAGE_MASK) | |
743 | return -EINVAL; | |
744 | ||
745 | if (vma->vm_flags & VM_WRITE) | |
746 | direction = DMA_TO_DEVICE; | |
747 | else | |
748 | direction = DMA_FROM_DEVICE; | |
749 | ||
750 | retval = fw_iso_buffer_init(&client->buffer, client->device->card, | |
751 | page_count, direction); | |
752 | if (retval < 0) | |
753 | return retval; | |
19a15b93 | 754 | |
9aad8125 KH |
755 | retval = fw_iso_buffer_map(&client->buffer, vma); |
756 | if (retval < 0) | |
757 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
758 | ||
759 | return retval; | |
19a15b93 KH |
760 | } |
761 | ||
762 | static int fw_device_op_release(struct inode *inode, struct file *file) | |
763 | { | |
764 | struct client *client = file->private_data; | |
2603bf21 | 765 | struct address_handler *h, *next_h; |
19a15b93 | 766 | struct request *r, *next_r; |
2603bf21 | 767 | struct event *e, *next_e; |
28cf6a04 | 768 | struct response *t, *next_t; |
97bd9efa | 769 | unsigned long flags; |
19a15b93 | 770 | |
9aad8125 KH |
771 | if (client->buffer.pages) |
772 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
773 | ||
19a15b93 KH |
774 | if (client->iso_context) |
775 | fw_iso_context_destroy(client->iso_context); | |
776 | ||
2603bf21 | 777 | list_for_each_entry_safe(h, next_h, &client->handler_list, link) { |
19a15b93 KH |
778 | fw_core_remove_address_handler(&h->handler); |
779 | kfree(h); | |
780 | } | |
781 | ||
782 | list_for_each_entry_safe(r, next_r, &client->request_list, link) { | |
783 | fw_send_response(client->device->card, r->request, | |
784 | RCODE_CONFLICT_ERROR); | |
785 | kfree(r); | |
786 | } | |
787 | ||
28cf6a04 KH |
788 | list_for_each_entry_safe(t, next_t, &client->transaction_list, link) |
789 | fw_cancel_transaction(client->device->card, &t->transaction); | |
790 | ||
791 | /* FIXME: We should wait for the async tasklets to stop | |
792 | * running before freeing the memory. */ | |
793 | ||
2603bf21 KH |
794 | list_for_each_entry_safe(e, next_e, &client->event_list, link) |
795 | kfree(e); | |
19a15b93 | 796 | |
97bd9efa KH |
797 | spin_lock_irqsave(&client->device->card->lock, flags); |
798 | list_del(&client->link); | |
799 | spin_unlock_irqrestore(&client->device->card->lock, flags); | |
800 | ||
19a15b93 KH |
801 | fw_device_put(client->device); |
802 | kfree(client); | |
803 | ||
804 | return 0; | |
805 | } | |
806 | ||
807 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
808 | { | |
809 | struct client *client = file->private_data; | |
2603bf21 | 810 | unsigned int mask = 0; |
19a15b93 KH |
811 | |
812 | poll_wait(file, &client->wait, pt); | |
813 | ||
2603bf21 KH |
814 | if (fw_device_is_shutdown(client->device)) |
815 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 816 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
817 | mask |= POLLIN | POLLRDNORM; |
818 | ||
819 | return mask; | |
19a15b93 KH |
820 | } |
821 | ||
21ebcd12 | 822 | const struct file_operations fw_device_ops = { |
19a15b93 KH |
823 | .owner = THIS_MODULE, |
824 | .open = fw_device_op_open, | |
825 | .read = fw_device_op_read, | |
826 | .unlocked_ioctl = fw_device_op_ioctl, | |
827 | .poll = fw_device_op_poll, | |
828 | .release = fw_device_op_release, | |
829 | .mmap = fw_device_op_mmap, | |
830 | ||
831 | #ifdef CONFIG_COMPAT | |
5af4e5ea | 832 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
833 | #endif |
834 | }; |