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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); | |
d84702a5 SR |
277 | size_t want = get_info.rom_length; |
278 | size_t have = client->device->config_rom_length * 4; | |
344bbc4d | 279 | |
d84702a5 SR |
280 | if (copy_to_user(uptr, client->device->config_rom, |
281 | min(want, have))) | |
344bbc4d KH |
282 | return -EFAULT; |
283 | } | |
284 | get_info.rom_length = client->device->config_rom_length * 4; | |
285 | ||
286 | if (get_info.bus_reset != 0) { | |
287 | void __user *uptr = u64_to_uptr(get_info.bus_reset); | |
288 | ||
289 | fill_bus_reset_event(&bus_reset, client->device); | |
290 | if (copy_to_user(uptr, &bus_reset, sizeof bus_reset)) | |
291 | return -EFAULT; | |
292 | } | |
19a15b93 | 293 | |
e7533505 KH |
294 | get_info.card = client->device->card->index; |
295 | ||
344bbc4d | 296 | if (copy_to_user(arg, &get_info, sizeof get_info)) |
19a15b93 KH |
297 | return -EFAULT; |
298 | ||
299 | return 0; | |
300 | } | |
301 | ||
302 | static void | |
303 | complete_transaction(struct fw_card *card, int rcode, | |
304 | void *payload, size_t length, void *data) | |
305 | { | |
306 | struct response *response = data; | |
307 | struct client *client = response->client; | |
28cf6a04 | 308 | unsigned long flags; |
19a15b93 KH |
309 | |
310 | if (length < response->response.length) | |
311 | response->response.length = length; | |
312 | if (rcode == RCODE_COMPLETE) | |
313 | memcpy(response->response.data, payload, | |
314 | response->response.length); | |
315 | ||
28cf6a04 KH |
316 | spin_lock_irqsave(&client->lock, flags); |
317 | list_del(&response->link); | |
318 | spin_unlock_irqrestore(&client->lock, flags); | |
319 | ||
19a15b93 KH |
320 | response->response.type = FW_CDEV_EVENT_RESPONSE; |
321 | response->response.rcode = rcode; | |
322 | queue_event(client, &response->event, | |
323 | &response->response, sizeof response->response, | |
324 | response->response.data, response->response.length); | |
325 | } | |
326 | ||
327 | static ssize_t ioctl_send_request(struct client *client, void __user *arg) | |
328 | { | |
329 | struct fw_device *device = client->device; | |
330 | struct fw_cdev_send_request request; | |
331 | struct response *response; | |
28cf6a04 | 332 | unsigned long flags; |
19a15b93 KH |
333 | |
334 | if (copy_from_user(&request, arg, sizeof request)) | |
335 | return -EFAULT; | |
336 | ||
337 | /* What is the biggest size we'll accept, really? */ | |
338 | if (request.length > 4096) | |
339 | return -EINVAL; | |
340 | ||
341 | response = kmalloc(sizeof *response + request.length, GFP_KERNEL); | |
342 | if (response == NULL) | |
343 | return -ENOMEM; | |
344 | ||
345 | response->client = client; | |
346 | response->response.length = request.length; | |
347 | response->response.closure = request.closure; | |
348 | ||
349 | if (request.data && | |
350 | copy_from_user(response->response.data, | |
351 | u64_to_uptr(request.data), request.length)) { | |
352 | kfree(response); | |
353 | return -EFAULT; | |
354 | } | |
355 | ||
28cf6a04 KH |
356 | spin_lock_irqsave(&client->lock, flags); |
357 | list_add_tail(&response->link, &client->transaction_list); | |
358 | spin_unlock_irqrestore(&client->lock, flags); | |
359 | ||
19a15b93 | 360 | fw_send_request(device->card, &response->transaction, |
344bbc4d | 361 | request.tcode & 0x1f, |
907293d7 | 362 | device->node->node_id, |
97e35275 | 363 | request.generation, |
19a15b93 KH |
364 | device->node->max_speed, |
365 | request.offset, | |
366 | response->response.data, request.length, | |
367 | complete_transaction, response); | |
368 | ||
369 | if (request.data) | |
370 | return sizeof request + request.length; | |
371 | else | |
372 | return sizeof request; | |
373 | } | |
374 | ||
375 | struct address_handler { | |
376 | struct fw_address_handler handler; | |
377 | __u64 closure; | |
378 | struct client *client; | |
379 | struct list_head link; | |
380 | }; | |
381 | ||
382 | struct request { | |
383 | struct fw_request *request; | |
384 | void *data; | |
385 | size_t length; | |
386 | u32 serial; | |
387 | struct list_head link; | |
388 | }; | |
389 | ||
390 | struct request_event { | |
391 | struct event event; | |
392 | struct fw_cdev_event_request request; | |
393 | }; | |
394 | ||
395 | static void | |
396 | handle_request(struct fw_card *card, struct fw_request *r, | |
397 | int tcode, int destination, int source, | |
398 | int generation, int speed, | |
399 | unsigned long long offset, | |
400 | void *payload, size_t length, void *callback_data) | |
401 | { | |
402 | struct address_handler *handler = callback_data; | |
403 | struct request *request; | |
404 | struct request_event *e; | |
405 | unsigned long flags; | |
406 | struct client *client = handler->client; | |
407 | ||
408 | request = kmalloc(sizeof *request, GFP_ATOMIC); | |
409 | e = kmalloc(sizeof *e, GFP_ATOMIC); | |
410 | if (request == NULL || e == NULL) { | |
411 | kfree(request); | |
412 | kfree(e); | |
413 | fw_send_response(card, r, RCODE_CONFLICT_ERROR); | |
414 | return; | |
415 | } | |
416 | ||
417 | request->request = r; | |
418 | request->data = payload; | |
419 | request->length = length; | |
420 | ||
421 | spin_lock_irqsave(&client->lock, flags); | |
422 | request->serial = client->request_serial++; | |
423 | list_add_tail(&request->link, &client->request_list); | |
424 | spin_unlock_irqrestore(&client->lock, flags); | |
425 | ||
426 | e->request.type = FW_CDEV_EVENT_REQUEST; | |
427 | e->request.tcode = tcode; | |
428 | e->request.offset = offset; | |
429 | e->request.length = length; | |
430 | e->request.serial = request->serial; | |
431 | e->request.closure = handler->closure; | |
432 | ||
433 | queue_event(client, &e->event, | |
434 | &e->request, sizeof e->request, payload, length); | |
435 | } | |
436 | ||
437 | static int ioctl_allocate(struct client *client, void __user *arg) | |
438 | { | |
439 | struct fw_cdev_allocate request; | |
440 | struct address_handler *handler; | |
441 | unsigned long flags; | |
442 | struct fw_address_region region; | |
443 | ||
444 | if (copy_from_user(&request, arg, sizeof request)) | |
445 | return -EFAULT; | |
446 | ||
447 | handler = kmalloc(sizeof *handler, GFP_KERNEL); | |
448 | if (handler == NULL) | |
449 | return -ENOMEM; | |
450 | ||
451 | region.start = request.offset; | |
452 | region.end = request.offset + request.length; | |
453 | handler->handler.length = request.length; | |
454 | handler->handler.address_callback = handle_request; | |
455 | handler->handler.callback_data = handler; | |
456 | handler->closure = request.closure; | |
457 | handler->client = client; | |
458 | ||
459 | if (fw_core_add_address_handler(&handler->handler, ®ion) < 0) { | |
460 | kfree(handler); | |
461 | return -EBUSY; | |
462 | } | |
463 | ||
464 | spin_lock_irqsave(&client->lock, flags); | |
465 | list_add_tail(&handler->link, &client->handler_list); | |
466 | spin_unlock_irqrestore(&client->lock, flags); | |
467 | ||
468 | return 0; | |
469 | } | |
470 | ||
9472316b KH |
471 | static int ioctl_deallocate(struct client *client, void __user *arg) |
472 | { | |
473 | struct fw_cdev_deallocate request; | |
474 | struct address_handler *handler; | |
475 | unsigned long flags; | |
476 | ||
477 | if (copy_from_user(&request, arg, sizeof request)) | |
478 | return -EFAULT; | |
479 | ||
480 | spin_lock_irqsave(&client->lock, flags); | |
481 | list_for_each_entry(handler, &client->handler_list, link) { | |
482 | if (handler->handler.offset == request.offset) { | |
483 | list_del(&handler->link); | |
484 | break; | |
485 | } | |
486 | } | |
487 | spin_unlock_irqrestore(&client->lock, flags); | |
488 | ||
489 | if (&handler->link == &client->handler_list) | |
490 | return -EINVAL; | |
491 | ||
492 | fw_core_remove_address_handler(&handler->handler); | |
493 | ||
494 | return 0; | |
495 | } | |
496 | ||
19a15b93 KH |
497 | static int ioctl_send_response(struct client *client, void __user *arg) |
498 | { | |
499 | struct fw_cdev_send_response request; | |
500 | struct request *r; | |
501 | unsigned long flags; | |
502 | ||
503 | if (copy_from_user(&request, arg, sizeof request)) | |
504 | return -EFAULT; | |
505 | ||
506 | spin_lock_irqsave(&client->lock, flags); | |
507 | list_for_each_entry(r, &client->request_list, link) { | |
508 | if (r->serial == request.serial) { | |
509 | list_del(&r->link); | |
510 | break; | |
511 | } | |
512 | } | |
513 | spin_unlock_irqrestore(&client->lock, flags); | |
514 | ||
515 | if (&r->link == &client->request_list) | |
516 | return -EINVAL; | |
517 | ||
518 | if (request.length < r->length) | |
519 | r->length = request.length; | |
520 | if (copy_from_user(r->data, u64_to_uptr(request.data), r->length)) | |
521 | return -EFAULT; | |
522 | ||
523 | fw_send_response(client->device->card, r->request, request.rcode); | |
524 | ||
525 | kfree(r); | |
526 | ||
527 | return 0; | |
528 | } | |
529 | ||
5371842b KH |
530 | static int ioctl_initiate_bus_reset(struct client *client, void __user *arg) |
531 | { | |
532 | struct fw_cdev_initiate_bus_reset request; | |
533 | int short_reset; | |
534 | ||
535 | if (copy_from_user(&request, arg, sizeof request)) | |
536 | return -EFAULT; | |
537 | ||
538 | short_reset = (request.type == FW_CDEV_SHORT_RESET); | |
539 | ||
540 | return fw_core_initiate_bus_reset(client->device->card, short_reset); | |
541 | } | |
542 | ||
19a15b93 | 543 | static void |
9b32d5f3 KH |
544 | iso_callback(struct fw_iso_context *context, u32 cycle, |
545 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
546 | { |
547 | struct client *client = data; | |
548 | struct iso_interrupt *interrupt; | |
549 | ||
9b32d5f3 | 550 | interrupt = kzalloc(sizeof *interrupt + header_length, GFP_ATOMIC); |
19a15b93 KH |
551 | if (interrupt == NULL) |
552 | return; | |
553 | ||
554 | interrupt->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; | |
555 | interrupt->interrupt.closure = 0; | |
556 | interrupt->interrupt.cycle = cycle; | |
9b32d5f3 KH |
557 | interrupt->interrupt.header_length = header_length; |
558 | memcpy(interrupt->interrupt.header, header, header_length); | |
19a15b93 | 559 | queue_event(client, &interrupt->event, |
9b32d5f3 KH |
560 | &interrupt->interrupt, |
561 | sizeof interrupt->interrupt + header_length, NULL, 0); | |
19a15b93 KH |
562 | } |
563 | ||
564 | static int ioctl_create_iso_context(struct client *client, void __user *arg) | |
565 | { | |
566 | struct fw_cdev_create_iso_context request; | |
567 | ||
568 | if (copy_from_user(&request, arg, sizeof request)) | |
569 | return -EFAULT; | |
570 | ||
21efb3cf KH |
571 | if (request.channel > 63) |
572 | return -EINVAL; | |
573 | ||
c70dc788 KH |
574 | switch (request.type) { |
575 | case FW_ISO_CONTEXT_RECEIVE: | |
c70dc788 KH |
576 | if (request.header_size < 4 || (request.header_size & 3)) |
577 | return -EINVAL; | |
98b6cbe8 | 578 | |
c70dc788 KH |
579 | break; |
580 | ||
581 | case FW_ISO_CONTEXT_TRANSMIT: | |
582 | if (request.speed > SCODE_3200) | |
583 | return -EINVAL; | |
584 | ||
585 | break; | |
586 | ||
587 | default: | |
21efb3cf | 588 | return -EINVAL; |
c70dc788 KH |
589 | } |
590 | ||
19a15b93 | 591 | client->iso_context = fw_iso_context_create(client->device->card, |
295e3feb | 592 | request.type, |
21efb3cf KH |
593 | request.channel, |
594 | request.speed, | |
8fbdbb36 | 595 | request.header_size, |
19a15b93 KH |
596 | iso_callback, client); |
597 | if (IS_ERR(client->iso_context)) | |
598 | return PTR_ERR(client->iso_context); | |
599 | ||
600 | return 0; | |
601 | } | |
602 | ||
603 | static int ioctl_queue_iso(struct client *client, void __user *arg) | |
604 | { | |
605 | struct fw_cdev_queue_iso request; | |
606 | struct fw_cdev_iso_packet __user *p, *end, *next; | |
9b32d5f3 | 607 | struct fw_iso_context *ctx = client->iso_context; |
295e3feb | 608 | unsigned long payload, payload_end, header_length; |
19a15b93 KH |
609 | int count; |
610 | struct { | |
611 | struct fw_iso_packet packet; | |
612 | u8 header[256]; | |
613 | } u; | |
614 | ||
9b32d5f3 | 615 | if (ctx == NULL) |
19a15b93 KH |
616 | return -EINVAL; |
617 | if (copy_from_user(&request, arg, sizeof request)) | |
618 | return -EFAULT; | |
619 | ||
620 | /* If the user passes a non-NULL data pointer, has mmap()'ed | |
621 | * the iso buffer, and the pointer points inside the buffer, | |
622 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 623 | * set them both to 0, which will still let packets with |
19a15b93 KH |
624 | * payload_length == 0 through. In other words, if no packets |
625 | * use the indirect payload, the iso buffer need not be mapped | |
626 | * and the request.data pointer is ignored.*/ | |
627 | ||
9aad8125 KH |
628 | payload = (unsigned long)request.data - client->vm_start; |
629 | payload_end = payload + (client->buffer.page_count << PAGE_SHIFT); | |
630 | if (request.data == 0 || client->buffer.pages == NULL || | |
631 | payload >= payload_end) { | |
632 | payload = 0; | |
633 | payload_end = 0; | |
19a15b93 KH |
634 | } |
635 | ||
636 | if (!access_ok(VERIFY_READ, request.packets, request.size)) | |
637 | return -EFAULT; | |
638 | ||
639 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(request.packets); | |
640 | end = (void __user *)p + request.size; | |
641 | count = 0; | |
642 | while (p < end) { | |
643 | if (__copy_from_user(&u.packet, p, sizeof *p)) | |
644 | return -EFAULT; | |
295e3feb | 645 | |
9b32d5f3 | 646 | if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) { |
295e3feb KH |
647 | header_length = u.packet.header_length; |
648 | } else { | |
649 | /* We require that header_length is a multiple of | |
650 | * the fixed header size, ctx->header_size */ | |
9b32d5f3 KH |
651 | if (ctx->header_size == 0) { |
652 | if (u.packet.header_length > 0) | |
653 | return -EINVAL; | |
654 | } else if (u.packet.header_length % ctx->header_size != 0) { | |
295e3feb | 655 | return -EINVAL; |
9b32d5f3 | 656 | } |
295e3feb KH |
657 | header_length = 0; |
658 | } | |
659 | ||
19a15b93 | 660 | next = (struct fw_cdev_iso_packet __user *) |
295e3feb | 661 | &p->header[header_length / 4]; |
19a15b93 KH |
662 | if (next > end) |
663 | return -EINVAL; | |
664 | if (__copy_from_user | |
295e3feb | 665 | (u.packet.header, p->header, header_length)) |
19a15b93 | 666 | return -EFAULT; |
98b6cbe8 | 667 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
668 | u.packet.header_length + u.packet.payload_length > 0) |
669 | return -EINVAL; | |
670 | if (payload + u.packet.payload_length > payload_end) | |
671 | return -EINVAL; | |
672 | ||
9b32d5f3 KH |
673 | if (fw_iso_context_queue(ctx, &u.packet, |
674 | &client->buffer, payload)) | |
19a15b93 KH |
675 | break; |
676 | ||
677 | p = next; | |
678 | payload += u.packet.payload_length; | |
679 | count++; | |
680 | } | |
681 | ||
682 | request.size -= uptr_to_u64(p) - request.packets; | |
683 | request.packets = uptr_to_u64(p); | |
9aad8125 | 684 | request.data = client->vm_start + payload; |
19a15b93 KH |
685 | |
686 | if (copy_to_user(arg, &request, sizeof request)) | |
687 | return -EFAULT; | |
688 | ||
689 | return count; | |
690 | } | |
691 | ||
69cdb726 | 692 | static int ioctl_start_iso(struct client *client, void __user *arg) |
19a15b93 | 693 | { |
69cdb726 | 694 | struct fw_cdev_start_iso request; |
19a15b93 KH |
695 | |
696 | if (copy_from_user(&request, arg, sizeof request)) | |
697 | return -EFAULT; | |
698 | ||
eb0306ea KH |
699 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE) { |
700 | if (request.tags == 0 || request.tags > 15) | |
701 | return -EINVAL; | |
702 | ||
703 | if (request.sync > 15) | |
704 | return -EINVAL; | |
705 | } | |
706 | ||
707 | return fw_iso_context_start(client->iso_context, | |
708 | request.cycle, request.sync, request.tags); | |
19a15b93 KH |
709 | } |
710 | ||
b8295668 KH |
711 | static int ioctl_stop_iso(struct client *client, void __user *arg) |
712 | { | |
713 | return fw_iso_context_stop(client->iso_context); | |
714 | } | |
715 | ||
19a15b93 KH |
716 | static int |
717 | dispatch_ioctl(struct client *client, unsigned int cmd, void __user *arg) | |
718 | { | |
719 | switch (cmd) { | |
344bbc4d KH |
720 | case FW_CDEV_IOC_GET_INFO: |
721 | return ioctl_get_info(client, arg); | |
19a15b93 KH |
722 | case FW_CDEV_IOC_SEND_REQUEST: |
723 | return ioctl_send_request(client, arg); | |
724 | case FW_CDEV_IOC_ALLOCATE: | |
725 | return ioctl_allocate(client, arg); | |
9472316b KH |
726 | case FW_CDEV_IOC_DEALLOCATE: |
727 | return ioctl_deallocate(client, arg); | |
19a15b93 KH |
728 | case FW_CDEV_IOC_SEND_RESPONSE: |
729 | return ioctl_send_response(client, arg); | |
5371842b KH |
730 | case FW_CDEV_IOC_INITIATE_BUS_RESET: |
731 | return ioctl_initiate_bus_reset(client, arg); | |
19a15b93 KH |
732 | case FW_CDEV_IOC_CREATE_ISO_CONTEXT: |
733 | return ioctl_create_iso_context(client, arg); | |
734 | case FW_CDEV_IOC_QUEUE_ISO: | |
735 | return ioctl_queue_iso(client, arg); | |
69cdb726 KH |
736 | case FW_CDEV_IOC_START_ISO: |
737 | return ioctl_start_iso(client, arg); | |
b8295668 KH |
738 | case FW_CDEV_IOC_STOP_ISO: |
739 | return ioctl_stop_iso(client, arg); | |
19a15b93 KH |
740 | default: |
741 | return -EINVAL; | |
742 | } | |
743 | } | |
744 | ||
745 | static long | |
746 | fw_device_op_ioctl(struct file *file, | |
747 | unsigned int cmd, unsigned long arg) | |
748 | { | |
749 | struct client *client = file->private_data; | |
750 | ||
751 | return dispatch_ioctl(client, cmd, (void __user *) arg); | |
752 | } | |
753 | ||
754 | #ifdef CONFIG_COMPAT | |
755 | static long | |
756 | fw_device_op_compat_ioctl(struct file *file, | |
757 | unsigned int cmd, unsigned long arg) | |
758 | { | |
759 | struct client *client = file->private_data; | |
760 | ||
761 | return dispatch_ioctl(client, cmd, compat_ptr(arg)); | |
762 | } | |
763 | #endif | |
764 | ||
765 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
766 | { | |
767 | struct client *client = file->private_data; | |
9aad8125 KH |
768 | enum dma_data_direction direction; |
769 | unsigned long size; | |
770 | int page_count, retval; | |
771 | ||
772 | /* FIXME: We could support multiple buffers, but we don't. */ | |
773 | if (client->buffer.pages != NULL) | |
774 | return -EBUSY; | |
775 | ||
776 | if (!(vma->vm_flags & VM_SHARED)) | |
777 | return -EINVAL; | |
19a15b93 | 778 | |
9aad8125 | 779 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
780 | return -EINVAL; |
781 | ||
782 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
783 | size = vma->vm_end - vma->vm_start; |
784 | page_count = size >> PAGE_SHIFT; | |
785 | if (size & ~PAGE_MASK) | |
786 | return -EINVAL; | |
787 | ||
788 | if (vma->vm_flags & VM_WRITE) | |
789 | direction = DMA_TO_DEVICE; | |
790 | else | |
791 | direction = DMA_FROM_DEVICE; | |
792 | ||
793 | retval = fw_iso_buffer_init(&client->buffer, client->device->card, | |
794 | page_count, direction); | |
795 | if (retval < 0) | |
796 | return retval; | |
19a15b93 | 797 | |
9aad8125 KH |
798 | retval = fw_iso_buffer_map(&client->buffer, vma); |
799 | if (retval < 0) | |
800 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
801 | ||
802 | return retval; | |
19a15b93 KH |
803 | } |
804 | ||
805 | static int fw_device_op_release(struct inode *inode, struct file *file) | |
806 | { | |
807 | struct client *client = file->private_data; | |
2603bf21 | 808 | struct address_handler *h, *next_h; |
19a15b93 | 809 | struct request *r, *next_r; |
2603bf21 | 810 | struct event *e, *next_e; |
28cf6a04 | 811 | struct response *t, *next_t; |
97bd9efa | 812 | unsigned long flags; |
19a15b93 | 813 | |
9aad8125 KH |
814 | if (client->buffer.pages) |
815 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
816 | ||
19a15b93 KH |
817 | if (client->iso_context) |
818 | fw_iso_context_destroy(client->iso_context); | |
819 | ||
2603bf21 | 820 | list_for_each_entry_safe(h, next_h, &client->handler_list, link) { |
19a15b93 KH |
821 | fw_core_remove_address_handler(&h->handler); |
822 | kfree(h); | |
823 | } | |
824 | ||
825 | list_for_each_entry_safe(r, next_r, &client->request_list, link) { | |
826 | fw_send_response(client->device->card, r->request, | |
827 | RCODE_CONFLICT_ERROR); | |
828 | kfree(r); | |
829 | } | |
830 | ||
7e35f7f3 | 831 | list_for_each_entry_safe(t, next_t, &client->transaction_list, link) { |
28cf6a04 | 832 | fw_cancel_transaction(client->device->card, &t->transaction); |
7e35f7f3 KH |
833 | kfree(t); |
834 | } | |
28cf6a04 KH |
835 | |
836 | /* FIXME: We should wait for the async tasklets to stop | |
837 | * running before freeing the memory. */ | |
838 | ||
2603bf21 KH |
839 | list_for_each_entry_safe(e, next_e, &client->event_list, link) |
840 | kfree(e); | |
19a15b93 | 841 | |
97bd9efa KH |
842 | spin_lock_irqsave(&client->device->card->lock, flags); |
843 | list_del(&client->link); | |
844 | spin_unlock_irqrestore(&client->device->card->lock, flags); | |
845 | ||
19a15b93 KH |
846 | fw_device_put(client->device); |
847 | kfree(client); | |
848 | ||
849 | return 0; | |
850 | } | |
851 | ||
852 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
853 | { | |
854 | struct client *client = file->private_data; | |
2603bf21 | 855 | unsigned int mask = 0; |
19a15b93 KH |
856 | |
857 | poll_wait(file, &client->wait, pt); | |
858 | ||
2603bf21 KH |
859 | if (fw_device_is_shutdown(client->device)) |
860 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 861 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
862 | mask |= POLLIN | POLLRDNORM; |
863 | ||
864 | return mask; | |
19a15b93 KH |
865 | } |
866 | ||
21ebcd12 | 867 | const struct file_operations fw_device_ops = { |
19a15b93 KH |
868 | .owner = THIS_MODULE, |
869 | .open = fw_device_op_open, | |
870 | .read = fw_device_op_read, | |
871 | .unlocked_ioctl = fw_device_op_ioctl, | |
872 | .poll = fw_device_op_poll, | |
873 | .release = fw_device_op_release, | |
874 | .mmap = fw_device_op_mmap, | |
875 | ||
876 | #ifdef CONFIG_COMPAT | |
5af4e5ea | 877 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
878 | #endif |
879 | }; |