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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 | ||
19a15b93 KH |
39 | /* dequeue_event() just kfree()'s the event, so the event has to be |
40 | * the first field in the struct. */ | |
41 | ||
3964a449 KH |
42 | struct client; |
43 | struct client_resource { | |
44 | struct list_head link; | |
45 | void (*release)(struct client *client, struct client_resource *r); | |
46 | u32 handle; | |
47 | }; | |
48 | ||
19a15b93 KH |
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; | |
3964a449 | 63 | struct client_resource resource; |
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; | |
66dea3e5 | 76 | u32 resource_handle; |
3964a449 | 77 | struct list_head resource_list; |
19a15b93 | 78 | struct list_head event_list; |
19a15b93 | 79 | wait_queue_head_t wait; |
da8ecffa | 80 | u64 bus_reset_closure; |
9aad8125 | 81 | |
19a15b93 | 82 | struct fw_iso_context *iso_context; |
9aad8125 KH |
83 | struct fw_iso_buffer buffer; |
84 | unsigned long vm_start; | |
97bd9efa KH |
85 | |
86 | struct list_head link; | |
19a15b93 KH |
87 | }; |
88 | ||
89 | static inline void __user * | |
90 | u64_to_uptr(__u64 value) | |
91 | { | |
92 | return (void __user *)(unsigned long)value; | |
93 | } | |
94 | ||
95 | static inline __u64 | |
96 | uptr_to_u64(void __user *ptr) | |
97 | { | |
98 | return (__u64)(unsigned long)ptr; | |
99 | } | |
100 | ||
101 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
102 | { | |
103 | struct fw_device *device; | |
104 | struct client *client; | |
97bd9efa | 105 | unsigned long flags; |
19a15b93 | 106 | |
a3aca3da KH |
107 | device = fw_device_from_devt(inode->i_rdev); |
108 | if (device == NULL) | |
109 | return -ENODEV; | |
19a15b93 KH |
110 | |
111 | client = kzalloc(sizeof *client, GFP_KERNEL); | |
112 | if (client == NULL) | |
113 | return -ENOMEM; | |
114 | ||
115 | client->device = fw_device_get(device); | |
116 | INIT_LIST_HEAD(&client->event_list); | |
3964a449 | 117 | INIT_LIST_HEAD(&client->resource_list); |
19a15b93 KH |
118 | spin_lock_init(&client->lock); |
119 | init_waitqueue_head(&client->wait); | |
120 | ||
121 | file->private_data = client; | |
122 | ||
97bd9efa KH |
123 | spin_lock_irqsave(&device->card->lock, flags); |
124 | list_add_tail(&client->link, &device->client_list); | |
125 | spin_unlock_irqrestore(&device->card->lock, flags); | |
126 | ||
19a15b93 KH |
127 | return 0; |
128 | } | |
129 | ||
130 | static void queue_event(struct client *client, struct event *event, | |
131 | void *data0, size_t size0, void *data1, size_t size1) | |
132 | { | |
133 | unsigned long flags; | |
134 | ||
135 | event->v[0].data = data0; | |
136 | event->v[0].size = size0; | |
137 | event->v[1].data = data1; | |
138 | event->v[1].size = size1; | |
139 | ||
140 | spin_lock_irqsave(&client->lock, flags); | |
141 | ||
142 | list_add_tail(&event->link, &client->event_list); | |
19a15b93 KH |
143 | wake_up_interruptible(&client->wait); |
144 | ||
145 | spin_unlock_irqrestore(&client->lock, flags); | |
146 | } | |
147 | ||
2603bf21 KH |
148 | static int |
149 | dequeue_event(struct client *client, char __user *buffer, size_t count) | |
19a15b93 KH |
150 | { |
151 | unsigned long flags; | |
152 | struct event *event; | |
153 | size_t size, total; | |
2603bf21 | 154 | int i, retval; |
19a15b93 | 155 | |
2603bf21 KH |
156 | retval = wait_event_interruptible(client->wait, |
157 | !list_empty(&client->event_list) || | |
158 | fw_device_is_shutdown(client->device)); | |
159 | if (retval < 0) | |
160 | return retval; | |
19a15b93 | 161 | |
2603bf21 KH |
162 | if (list_empty(&client->event_list) && |
163 | fw_device_is_shutdown(client->device)) | |
164 | return -ENODEV; | |
19a15b93 | 165 | |
2603bf21 | 166 | spin_lock_irqsave(&client->lock, flags); |
19a15b93 KH |
167 | event = container_of(client->event_list.next, struct event, link); |
168 | list_del(&event->link); | |
19a15b93 KH |
169 | spin_unlock_irqrestore(&client->lock, flags); |
170 | ||
19a15b93 KH |
171 | total = 0; |
172 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
173 | size = min(event->v[i].size, count - total); | |
2603bf21 KH |
174 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
175 | retval = -EFAULT; | |
19a15b93 | 176 | goto out; |
2603bf21 | 177 | } |
19a15b93 KH |
178 | total += size; |
179 | } | |
180 | retval = total; | |
181 | ||
182 | out: | |
183 | kfree(event); | |
184 | ||
185 | return retval; | |
186 | } | |
187 | ||
188 | static ssize_t | |
189 | fw_device_op_read(struct file *file, | |
190 | char __user *buffer, size_t count, loff_t *offset) | |
191 | { | |
192 | struct client *client = file->private_data; | |
193 | ||
194 | return dequeue_event(client, buffer, count); | |
195 | } | |
196 | ||
344bbc4d KH |
197 | static void |
198 | fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, | |
da8ecffa | 199 | struct client *client) |
344bbc4d | 200 | { |
da8ecffa | 201 | struct fw_card *card = client->device->card; |
344bbc4d | 202 | |
da8ecffa | 203 | event->closure = client->bus_reset_closure; |
344bbc4d | 204 | event->type = FW_CDEV_EVENT_BUS_RESET; |
da8ecffa | 205 | event->node_id = client->device->node_id; |
344bbc4d KH |
206 | event->local_node_id = card->local_node->node_id; |
207 | event->bm_node_id = 0; /* FIXME: We don't track the BM. */ | |
208 | event->irm_node_id = card->irm_node->node_id; | |
209 | event->root_node_id = card->root_node->node_id; | |
210 | event->generation = card->generation; | |
211 | } | |
212 | ||
2603bf21 KH |
213 | static void |
214 | for_each_client(struct fw_device *device, | |
215 | void (*callback)(struct client *client)) | |
216 | { | |
217 | struct fw_card *card = device->card; | |
218 | struct client *c; | |
219 | unsigned long flags; | |
220 | ||
221 | spin_lock_irqsave(&card->lock, flags); | |
222 | ||
223 | list_for_each_entry(c, &device->client_list, link) | |
224 | callback(c); | |
225 | ||
226 | spin_unlock_irqrestore(&card->lock, flags); | |
227 | } | |
228 | ||
97bd9efa KH |
229 | static void |
230 | queue_bus_reset_event(struct client *client) | |
231 | { | |
232 | struct bus_reset *bus_reset; | |
97bd9efa KH |
233 | |
234 | bus_reset = kzalloc(sizeof *bus_reset, GFP_ATOMIC); | |
235 | if (bus_reset == NULL) { | |
236 | fw_notify("Out of memory when allocating bus reset event\n"); | |
237 | return; | |
238 | } | |
239 | ||
da8ecffa | 240 | fill_bus_reset_event(&bus_reset->reset, client); |
97bd9efa KH |
241 | |
242 | queue_event(client, &bus_reset->event, | |
243 | &bus_reset->reset, sizeof bus_reset->reset, NULL, 0); | |
244 | } | |
245 | ||
246 | void fw_device_cdev_update(struct fw_device *device) | |
247 | { | |
2603bf21 KH |
248 | for_each_client(device, queue_bus_reset_event); |
249 | } | |
97bd9efa | 250 | |
2603bf21 KH |
251 | static void wake_up_client(struct client *client) |
252 | { | |
253 | wake_up_interruptible(&client->wait); | |
254 | } | |
97bd9efa | 255 | |
2603bf21 KH |
256 | void fw_device_cdev_remove(struct fw_device *device) |
257 | { | |
258 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
259 | } |
260 | ||
344bbc4d | 261 | static int ioctl_get_info(struct client *client, void __user *arg) |
19a15b93 | 262 | { |
344bbc4d KH |
263 | struct fw_cdev_get_info get_info; |
264 | struct fw_cdev_event_bus_reset bus_reset; | |
265 | ||
266 | if (copy_from_user(&get_info, arg, sizeof get_info)) | |
267 | return -EFAULT; | |
268 | ||
269 | client->version = get_info.version; | |
270 | get_info.version = FW_CDEV_VERSION; | |
271 | ||
272 | if (get_info.rom != 0) { | |
273 | void __user *uptr = u64_to_uptr(get_info.rom); | |
d84702a5 SR |
274 | size_t want = get_info.rom_length; |
275 | size_t have = client->device->config_rom_length * 4; | |
344bbc4d | 276 | |
d84702a5 SR |
277 | if (copy_to_user(uptr, client->device->config_rom, |
278 | min(want, have))) | |
344bbc4d KH |
279 | return -EFAULT; |
280 | } | |
281 | get_info.rom_length = client->device->config_rom_length * 4; | |
282 | ||
da8ecffa | 283 | client->bus_reset_closure = get_info.bus_reset_closure; |
344bbc4d KH |
284 | if (get_info.bus_reset != 0) { |
285 | void __user *uptr = u64_to_uptr(get_info.bus_reset); | |
286 | ||
da8ecffa | 287 | fill_bus_reset_event(&bus_reset, client); |
344bbc4d KH |
288 | if (copy_to_user(uptr, &bus_reset, sizeof bus_reset)) |
289 | return -EFAULT; | |
290 | } | |
19a15b93 | 291 | |
e7533505 KH |
292 | get_info.card = client->device->card->index; |
293 | ||
344bbc4d | 294 | if (copy_to_user(arg, &get_info, sizeof get_info)) |
19a15b93 KH |
295 | return -EFAULT; |
296 | ||
297 | return 0; | |
298 | } | |
299 | ||
3964a449 KH |
300 | static void |
301 | add_client_resource(struct client *client, struct client_resource *resource) | |
302 | { | |
303 | unsigned long flags; | |
304 | ||
305 | spin_lock_irqsave(&client->lock, flags); | |
306 | list_add_tail(&resource->link, &client->resource_list); | |
307 | resource->handle = client->resource_handle++; | |
308 | spin_unlock_irqrestore(&client->lock, flags); | |
309 | } | |
310 | ||
311 | static int | |
312 | release_client_resource(struct client *client, u32 handle, | |
313 | struct client_resource **resource) | |
314 | { | |
315 | struct client_resource *r; | |
316 | unsigned long flags; | |
317 | ||
318 | spin_lock_irqsave(&client->lock, flags); | |
319 | list_for_each_entry(r, &client->resource_list, link) { | |
320 | if (r->handle == handle) { | |
321 | list_del(&r->link); | |
322 | break; | |
323 | } | |
324 | } | |
325 | spin_unlock_irqrestore(&client->lock, flags); | |
326 | ||
327 | if (&r->link == &client->resource_list) | |
328 | return -EINVAL; | |
329 | ||
330 | if (resource) | |
331 | *resource = r; | |
332 | else | |
333 | r->release(client, r); | |
334 | ||
335 | return 0; | |
336 | } | |
337 | ||
338 | static void | |
339 | release_transaction(struct client *client, struct client_resource *resource) | |
340 | { | |
341 | struct response *response = | |
342 | container_of(resource, struct response, resource); | |
343 | ||
344 | fw_cancel_transaction(client->device->card, &response->transaction); | |
345 | } | |
346 | ||
19a15b93 KH |
347 | static void |
348 | complete_transaction(struct fw_card *card, int rcode, | |
349 | void *payload, size_t length, void *data) | |
350 | { | |
351 | struct response *response = data; | |
352 | struct client *client = response->client; | |
28cf6a04 | 353 | unsigned long flags; |
19a15b93 KH |
354 | |
355 | if (length < response->response.length) | |
356 | response->response.length = length; | |
357 | if (rcode == RCODE_COMPLETE) | |
358 | memcpy(response->response.data, payload, | |
359 | response->response.length); | |
360 | ||
28cf6a04 | 361 | spin_lock_irqsave(&client->lock, flags); |
3964a449 | 362 | list_del(&response->resource.link); |
28cf6a04 KH |
363 | spin_unlock_irqrestore(&client->lock, flags); |
364 | ||
19a15b93 KH |
365 | response->response.type = FW_CDEV_EVENT_RESPONSE; |
366 | response->response.rcode = rcode; | |
367 | queue_event(client, &response->event, | |
368 | &response->response, sizeof response->response, | |
369 | response->response.data, response->response.length); | |
370 | } | |
371 | ||
372 | static ssize_t ioctl_send_request(struct client *client, void __user *arg) | |
373 | { | |
374 | struct fw_device *device = client->device; | |
375 | struct fw_cdev_send_request request; | |
376 | struct response *response; | |
377 | ||
378 | if (copy_from_user(&request, arg, sizeof request)) | |
379 | return -EFAULT; | |
380 | ||
381 | /* What is the biggest size we'll accept, really? */ | |
382 | if (request.length > 4096) | |
383 | return -EINVAL; | |
384 | ||
385 | response = kmalloc(sizeof *response + request.length, GFP_KERNEL); | |
386 | if (response == NULL) | |
387 | return -ENOMEM; | |
388 | ||
389 | response->client = client; | |
390 | response->response.length = request.length; | |
391 | response->response.closure = request.closure; | |
392 | ||
393 | if (request.data && | |
394 | copy_from_user(response->response.data, | |
395 | u64_to_uptr(request.data), request.length)) { | |
396 | kfree(response); | |
397 | return -EFAULT; | |
398 | } | |
399 | ||
3964a449 KH |
400 | response->resource.release = release_transaction; |
401 | add_client_resource(client, &response->resource); | |
28cf6a04 | 402 | |
19a15b93 | 403 | fw_send_request(device->card, &response->transaction, |
344bbc4d | 404 | request.tcode & 0x1f, |
907293d7 | 405 | device->node->node_id, |
97e35275 | 406 | request.generation, |
19a15b93 KH |
407 | device->node->max_speed, |
408 | request.offset, | |
409 | response->response.data, request.length, | |
410 | complete_transaction, response); | |
411 | ||
412 | if (request.data) | |
413 | return sizeof request + request.length; | |
414 | else | |
415 | return sizeof request; | |
416 | } | |
417 | ||
418 | struct address_handler { | |
419 | struct fw_address_handler handler; | |
420 | __u64 closure; | |
421 | struct client *client; | |
3964a449 | 422 | struct client_resource resource; |
19a15b93 KH |
423 | }; |
424 | ||
425 | struct request { | |
426 | struct fw_request *request; | |
427 | void *data; | |
428 | size_t length; | |
3964a449 | 429 | struct client_resource resource; |
19a15b93 KH |
430 | }; |
431 | ||
432 | struct request_event { | |
433 | struct event event; | |
434 | struct fw_cdev_event_request request; | |
435 | }; | |
436 | ||
3964a449 KH |
437 | static void |
438 | release_request(struct client *client, struct client_resource *resource) | |
439 | { | |
440 | struct request *request = | |
441 | container_of(resource, struct request, resource); | |
442 | ||
443 | fw_send_response(client->device->card, request->request, | |
444 | RCODE_CONFLICT_ERROR); | |
445 | kfree(request); | |
446 | } | |
447 | ||
19a15b93 KH |
448 | static void |
449 | handle_request(struct fw_card *card, struct fw_request *r, | |
450 | int tcode, int destination, int source, | |
451 | int generation, int speed, | |
452 | unsigned long long offset, | |
453 | void *payload, size_t length, void *callback_data) | |
454 | { | |
455 | struct address_handler *handler = callback_data; | |
456 | struct request *request; | |
457 | struct request_event *e; | |
19a15b93 KH |
458 | struct client *client = handler->client; |
459 | ||
460 | request = kmalloc(sizeof *request, GFP_ATOMIC); | |
461 | e = kmalloc(sizeof *e, GFP_ATOMIC); | |
462 | if (request == NULL || e == NULL) { | |
463 | kfree(request); | |
464 | kfree(e); | |
465 | fw_send_response(card, r, RCODE_CONFLICT_ERROR); | |
466 | return; | |
467 | } | |
468 | ||
469 | request->request = r; | |
470 | request->data = payload; | |
471 | request->length = length; | |
472 | ||
3964a449 KH |
473 | request->resource.release = release_request; |
474 | add_client_resource(client, &request->resource); | |
19a15b93 KH |
475 | |
476 | e->request.type = FW_CDEV_EVENT_REQUEST; | |
477 | e->request.tcode = tcode; | |
478 | e->request.offset = offset; | |
479 | e->request.length = length; | |
3964a449 | 480 | e->request.handle = request->resource.handle; |
19a15b93 KH |
481 | e->request.closure = handler->closure; |
482 | ||
483 | queue_event(client, &e->event, | |
484 | &e->request, sizeof e->request, payload, length); | |
485 | } | |
486 | ||
3964a449 KH |
487 | static void |
488 | release_address_handler(struct client *client, | |
489 | struct client_resource *resource) | |
490 | { | |
491 | struct address_handler *handler = | |
492 | container_of(resource, struct address_handler, resource); | |
493 | ||
494 | fw_core_remove_address_handler(&handler->handler); | |
495 | kfree(handler); | |
496 | } | |
497 | ||
19a15b93 KH |
498 | static int ioctl_allocate(struct client *client, void __user *arg) |
499 | { | |
500 | struct fw_cdev_allocate request; | |
501 | struct address_handler *handler; | |
19a15b93 KH |
502 | struct fw_address_region region; |
503 | ||
504 | if (copy_from_user(&request, arg, sizeof request)) | |
505 | return -EFAULT; | |
506 | ||
507 | handler = kmalloc(sizeof *handler, GFP_KERNEL); | |
508 | if (handler == NULL) | |
509 | return -ENOMEM; | |
510 | ||
511 | region.start = request.offset; | |
512 | region.end = request.offset + request.length; | |
513 | handler->handler.length = request.length; | |
514 | handler->handler.address_callback = handle_request; | |
515 | handler->handler.callback_data = handler; | |
516 | handler->closure = request.closure; | |
517 | handler->client = client; | |
518 | ||
519 | if (fw_core_add_address_handler(&handler->handler, ®ion) < 0) { | |
520 | kfree(handler); | |
521 | return -EBUSY; | |
522 | } | |
523 | ||
3964a449 KH |
524 | handler->resource.release = release_address_handler; |
525 | add_client_resource(client, &handler->resource); | |
526 | request.handle = handler->resource.handle; | |
527 | ||
528 | if (copy_to_user(arg, &request, sizeof request)) | |
529 | return -EFAULT; | |
19a15b93 KH |
530 | |
531 | return 0; | |
532 | } | |
533 | ||
9472316b KH |
534 | static int ioctl_deallocate(struct client *client, void __user *arg) |
535 | { | |
536 | struct fw_cdev_deallocate request; | |
9472316b KH |
537 | |
538 | if (copy_from_user(&request, arg, sizeof request)) | |
539 | return -EFAULT; | |
540 | ||
3964a449 | 541 | return release_client_resource(client, request.handle, NULL); |
9472316b KH |
542 | } |
543 | ||
19a15b93 KH |
544 | static int ioctl_send_response(struct client *client, void __user *arg) |
545 | { | |
546 | struct fw_cdev_send_response request; | |
3964a449 | 547 | struct client_resource *resource; |
19a15b93 | 548 | struct request *r; |
19a15b93 KH |
549 | |
550 | if (copy_from_user(&request, arg, sizeof request)) | |
551 | return -EFAULT; | |
3964a449 | 552 | if (release_client_resource(client, request.handle, &resource) < 0) |
19a15b93 | 553 | return -EINVAL; |
3964a449 | 554 | r = container_of(resource, struct request, resource); |
19a15b93 KH |
555 | if (request.length < r->length) |
556 | r->length = request.length; | |
557 | if (copy_from_user(r->data, u64_to_uptr(request.data), r->length)) | |
558 | return -EFAULT; | |
559 | ||
560 | fw_send_response(client->device->card, r->request, request.rcode); | |
19a15b93 KH |
561 | kfree(r); |
562 | ||
563 | return 0; | |
564 | } | |
565 | ||
5371842b KH |
566 | static int ioctl_initiate_bus_reset(struct client *client, void __user *arg) |
567 | { | |
568 | struct fw_cdev_initiate_bus_reset request; | |
569 | int short_reset; | |
570 | ||
571 | if (copy_from_user(&request, arg, sizeof request)) | |
572 | return -EFAULT; | |
573 | ||
574 | short_reset = (request.type == FW_CDEV_SHORT_RESET); | |
575 | ||
576 | return fw_core_initiate_bus_reset(client->device->card, short_reset); | |
577 | } | |
578 | ||
66dea3e5 KH |
579 | struct descriptor { |
580 | struct fw_descriptor d; | |
3964a449 | 581 | struct client_resource resource; |
66dea3e5 KH |
582 | u32 data[0]; |
583 | }; | |
584 | ||
3964a449 KH |
585 | static void release_descriptor(struct client *client, |
586 | struct client_resource *resource) | |
587 | { | |
588 | struct descriptor *descriptor = | |
589 | container_of(resource, struct descriptor, resource); | |
590 | ||
591 | fw_core_remove_descriptor(&descriptor->d); | |
592 | kfree(descriptor); | |
593 | } | |
594 | ||
66dea3e5 KH |
595 | static int ioctl_add_descriptor(struct client *client, void __user *arg) |
596 | { | |
597 | struct fw_cdev_add_descriptor request; | |
598 | struct descriptor *descriptor; | |
66dea3e5 KH |
599 | int retval; |
600 | ||
601 | if (copy_from_user(&request, arg, sizeof request)) | |
602 | return -EFAULT; | |
603 | ||
604 | if (request.length > 256) | |
605 | return -EINVAL; | |
606 | ||
607 | descriptor = | |
608 | kmalloc(sizeof *descriptor + request.length * 4, GFP_KERNEL); | |
609 | if (descriptor == NULL) | |
610 | return -ENOMEM; | |
611 | ||
612 | if (copy_from_user(descriptor->data, | |
613 | u64_to_uptr(request.data), request.length * 4)) { | |
614 | kfree(descriptor); | |
615 | return -EFAULT; | |
616 | } | |
617 | ||
618 | descriptor->d.length = request.length; | |
619 | descriptor->d.immediate = request.immediate; | |
620 | descriptor->d.key = request.key; | |
621 | descriptor->d.data = descriptor->data; | |
622 | ||
623 | retval = fw_core_add_descriptor(&descriptor->d); | |
624 | if (retval < 0) { | |
625 | kfree(descriptor); | |
626 | return retval; | |
627 | } | |
628 | ||
3964a449 KH |
629 | descriptor->resource.release = release_descriptor; |
630 | add_client_resource(client, &descriptor->resource); | |
631 | request.handle = descriptor->resource.handle; | |
66dea3e5 | 632 | |
66dea3e5 KH |
633 | if (copy_to_user(arg, &request, sizeof request)) |
634 | return -EFAULT; | |
635 | ||
636 | return 0; | |
637 | } | |
638 | ||
639 | static int ioctl_remove_descriptor(struct client *client, void __user *arg) | |
640 | { | |
641 | struct fw_cdev_remove_descriptor request; | |
66dea3e5 KH |
642 | |
643 | if (copy_from_user(&request, arg, sizeof request)) | |
644 | return -EFAULT; | |
645 | ||
3964a449 | 646 | return release_client_resource(client, request.handle, NULL); |
66dea3e5 KH |
647 | } |
648 | ||
19a15b93 | 649 | static void |
9b32d5f3 KH |
650 | iso_callback(struct fw_iso_context *context, u32 cycle, |
651 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
652 | { |
653 | struct client *client = data; | |
654 | struct iso_interrupt *interrupt; | |
655 | ||
9b32d5f3 | 656 | interrupt = kzalloc(sizeof *interrupt + header_length, GFP_ATOMIC); |
19a15b93 KH |
657 | if (interrupt == NULL) |
658 | return; | |
659 | ||
660 | interrupt->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; | |
661 | interrupt->interrupt.closure = 0; | |
662 | interrupt->interrupt.cycle = cycle; | |
9b32d5f3 KH |
663 | interrupt->interrupt.header_length = header_length; |
664 | memcpy(interrupt->interrupt.header, header, header_length); | |
19a15b93 | 665 | queue_event(client, &interrupt->event, |
9b32d5f3 KH |
666 | &interrupt->interrupt, |
667 | sizeof interrupt->interrupt + header_length, NULL, 0); | |
19a15b93 KH |
668 | } |
669 | ||
670 | static int ioctl_create_iso_context(struct client *client, void __user *arg) | |
671 | { | |
672 | struct fw_cdev_create_iso_context request; | |
673 | ||
674 | if (copy_from_user(&request, arg, sizeof request)) | |
675 | return -EFAULT; | |
676 | ||
21efb3cf KH |
677 | if (request.channel > 63) |
678 | return -EINVAL; | |
679 | ||
c70dc788 KH |
680 | switch (request.type) { |
681 | case FW_ISO_CONTEXT_RECEIVE: | |
c70dc788 KH |
682 | if (request.header_size < 4 || (request.header_size & 3)) |
683 | return -EINVAL; | |
98b6cbe8 | 684 | |
c70dc788 KH |
685 | break; |
686 | ||
687 | case FW_ISO_CONTEXT_TRANSMIT: | |
688 | if (request.speed > SCODE_3200) | |
689 | return -EINVAL; | |
690 | ||
691 | break; | |
692 | ||
693 | default: | |
21efb3cf | 694 | return -EINVAL; |
c70dc788 KH |
695 | } |
696 | ||
19a15b93 | 697 | client->iso_context = fw_iso_context_create(client->device->card, |
295e3feb | 698 | request.type, |
21efb3cf KH |
699 | request.channel, |
700 | request.speed, | |
8fbdbb36 | 701 | request.header_size, |
19a15b93 KH |
702 | iso_callback, client); |
703 | if (IS_ERR(client->iso_context)) | |
704 | return PTR_ERR(client->iso_context); | |
705 | ||
706 | return 0; | |
707 | } | |
708 | ||
709 | static int ioctl_queue_iso(struct client *client, void __user *arg) | |
710 | { | |
711 | struct fw_cdev_queue_iso request; | |
712 | struct fw_cdev_iso_packet __user *p, *end, *next; | |
9b32d5f3 | 713 | struct fw_iso_context *ctx = client->iso_context; |
ef370ee7 | 714 | unsigned long payload, buffer_end, header_length; |
19a15b93 KH |
715 | int count; |
716 | struct { | |
717 | struct fw_iso_packet packet; | |
718 | u8 header[256]; | |
719 | } u; | |
720 | ||
9b32d5f3 | 721 | if (ctx == NULL) |
19a15b93 KH |
722 | return -EINVAL; |
723 | if (copy_from_user(&request, arg, sizeof request)) | |
724 | return -EFAULT; | |
725 | ||
726 | /* If the user passes a non-NULL data pointer, has mmap()'ed | |
727 | * the iso buffer, and the pointer points inside the buffer, | |
728 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 729 | * set them both to 0, which will still let packets with |
19a15b93 KH |
730 | * payload_length == 0 through. In other words, if no packets |
731 | * use the indirect payload, the iso buffer need not be mapped | |
732 | * and the request.data pointer is ignored.*/ | |
733 | ||
9aad8125 | 734 | payload = (unsigned long)request.data - client->vm_start; |
ef370ee7 | 735 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
9aad8125 | 736 | if (request.data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 737 | payload >= buffer_end) { |
9aad8125 | 738 | payload = 0; |
ef370ee7 | 739 | buffer_end = 0; |
19a15b93 KH |
740 | } |
741 | ||
742 | if (!access_ok(VERIFY_READ, request.packets, request.size)) | |
743 | return -EFAULT; | |
744 | ||
745 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(request.packets); | |
746 | end = (void __user *)p + request.size; | |
747 | count = 0; | |
748 | while (p < end) { | |
749 | if (__copy_from_user(&u.packet, p, sizeof *p)) | |
750 | return -EFAULT; | |
295e3feb | 751 | |
9b32d5f3 | 752 | if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) { |
295e3feb KH |
753 | header_length = u.packet.header_length; |
754 | } else { | |
755 | /* We require that header_length is a multiple of | |
756 | * the fixed header size, ctx->header_size */ | |
9b32d5f3 KH |
757 | if (ctx->header_size == 0) { |
758 | if (u.packet.header_length > 0) | |
759 | return -EINVAL; | |
760 | } else if (u.packet.header_length % ctx->header_size != 0) { | |
295e3feb | 761 | return -EINVAL; |
9b32d5f3 | 762 | } |
295e3feb KH |
763 | header_length = 0; |
764 | } | |
765 | ||
19a15b93 | 766 | next = (struct fw_cdev_iso_packet __user *) |
295e3feb | 767 | &p->header[header_length / 4]; |
19a15b93 KH |
768 | if (next > end) |
769 | return -EINVAL; | |
770 | if (__copy_from_user | |
295e3feb | 771 | (u.packet.header, p->header, header_length)) |
19a15b93 | 772 | return -EFAULT; |
98b6cbe8 | 773 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
774 | u.packet.header_length + u.packet.payload_length > 0) |
775 | return -EINVAL; | |
ef370ee7 | 776 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
777 | return -EINVAL; |
778 | ||
9b32d5f3 KH |
779 | if (fw_iso_context_queue(ctx, &u.packet, |
780 | &client->buffer, payload)) | |
19a15b93 KH |
781 | break; |
782 | ||
783 | p = next; | |
784 | payload += u.packet.payload_length; | |
785 | count++; | |
786 | } | |
787 | ||
788 | request.size -= uptr_to_u64(p) - request.packets; | |
789 | request.packets = uptr_to_u64(p); | |
9aad8125 | 790 | request.data = client->vm_start + payload; |
19a15b93 KH |
791 | |
792 | if (copy_to_user(arg, &request, sizeof request)) | |
793 | return -EFAULT; | |
794 | ||
795 | return count; | |
796 | } | |
797 | ||
69cdb726 | 798 | static int ioctl_start_iso(struct client *client, void __user *arg) |
19a15b93 | 799 | { |
69cdb726 | 800 | struct fw_cdev_start_iso request; |
19a15b93 KH |
801 | |
802 | if (copy_from_user(&request, arg, sizeof request)) | |
803 | return -EFAULT; | |
804 | ||
eb0306ea KH |
805 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE) { |
806 | if (request.tags == 0 || request.tags > 15) | |
807 | return -EINVAL; | |
808 | ||
809 | if (request.sync > 15) | |
810 | return -EINVAL; | |
811 | } | |
812 | ||
813 | return fw_iso_context_start(client->iso_context, | |
814 | request.cycle, request.sync, request.tags); | |
19a15b93 KH |
815 | } |
816 | ||
b8295668 KH |
817 | static int ioctl_stop_iso(struct client *client, void __user *arg) |
818 | { | |
819 | return fw_iso_context_stop(client->iso_context); | |
820 | } | |
821 | ||
19a15b93 KH |
822 | static int |
823 | dispatch_ioctl(struct client *client, unsigned int cmd, void __user *arg) | |
824 | { | |
825 | switch (cmd) { | |
344bbc4d KH |
826 | case FW_CDEV_IOC_GET_INFO: |
827 | return ioctl_get_info(client, arg); | |
19a15b93 KH |
828 | case FW_CDEV_IOC_SEND_REQUEST: |
829 | return ioctl_send_request(client, arg); | |
830 | case FW_CDEV_IOC_ALLOCATE: | |
831 | return ioctl_allocate(client, arg); | |
9472316b KH |
832 | case FW_CDEV_IOC_DEALLOCATE: |
833 | return ioctl_deallocate(client, arg); | |
19a15b93 KH |
834 | case FW_CDEV_IOC_SEND_RESPONSE: |
835 | return ioctl_send_response(client, arg); | |
5371842b KH |
836 | case FW_CDEV_IOC_INITIATE_BUS_RESET: |
837 | return ioctl_initiate_bus_reset(client, arg); | |
66dea3e5 KH |
838 | case FW_CDEV_IOC_ADD_DESCRIPTOR: |
839 | return ioctl_add_descriptor(client, arg); | |
840 | case FW_CDEV_IOC_REMOVE_DESCRIPTOR: | |
841 | return ioctl_remove_descriptor(client, arg); | |
19a15b93 KH |
842 | case FW_CDEV_IOC_CREATE_ISO_CONTEXT: |
843 | return ioctl_create_iso_context(client, arg); | |
844 | case FW_CDEV_IOC_QUEUE_ISO: | |
845 | return ioctl_queue_iso(client, arg); | |
69cdb726 KH |
846 | case FW_CDEV_IOC_START_ISO: |
847 | return ioctl_start_iso(client, arg); | |
b8295668 KH |
848 | case FW_CDEV_IOC_STOP_ISO: |
849 | return ioctl_stop_iso(client, arg); | |
19a15b93 KH |
850 | default: |
851 | return -EINVAL; | |
852 | } | |
853 | } | |
854 | ||
855 | static long | |
856 | fw_device_op_ioctl(struct file *file, | |
857 | unsigned int cmd, unsigned long arg) | |
858 | { | |
859 | struct client *client = file->private_data; | |
860 | ||
861 | return dispatch_ioctl(client, cmd, (void __user *) arg); | |
862 | } | |
863 | ||
864 | #ifdef CONFIG_COMPAT | |
865 | static long | |
866 | fw_device_op_compat_ioctl(struct file *file, | |
867 | unsigned int cmd, unsigned long arg) | |
868 | { | |
869 | struct client *client = file->private_data; | |
870 | ||
871 | return dispatch_ioctl(client, cmd, compat_ptr(arg)); | |
872 | } | |
873 | #endif | |
874 | ||
875 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
876 | { | |
877 | struct client *client = file->private_data; | |
9aad8125 KH |
878 | enum dma_data_direction direction; |
879 | unsigned long size; | |
880 | int page_count, retval; | |
881 | ||
882 | /* FIXME: We could support multiple buffers, but we don't. */ | |
883 | if (client->buffer.pages != NULL) | |
884 | return -EBUSY; | |
885 | ||
886 | if (!(vma->vm_flags & VM_SHARED)) | |
887 | return -EINVAL; | |
19a15b93 | 888 | |
9aad8125 | 889 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
890 | return -EINVAL; |
891 | ||
892 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
893 | size = vma->vm_end - vma->vm_start; |
894 | page_count = size >> PAGE_SHIFT; | |
895 | if (size & ~PAGE_MASK) | |
896 | return -EINVAL; | |
897 | ||
898 | if (vma->vm_flags & VM_WRITE) | |
899 | direction = DMA_TO_DEVICE; | |
900 | else | |
901 | direction = DMA_FROM_DEVICE; | |
902 | ||
903 | retval = fw_iso_buffer_init(&client->buffer, client->device->card, | |
904 | page_count, direction); | |
905 | if (retval < 0) | |
906 | return retval; | |
19a15b93 | 907 | |
9aad8125 KH |
908 | retval = fw_iso_buffer_map(&client->buffer, vma); |
909 | if (retval < 0) | |
910 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
911 | ||
912 | return retval; | |
19a15b93 KH |
913 | } |
914 | ||
915 | static int fw_device_op_release(struct inode *inode, struct file *file) | |
916 | { | |
917 | struct client *client = file->private_data; | |
2603bf21 | 918 | struct event *e, *next_e; |
3964a449 | 919 | struct client_resource *r, *next_r; |
97bd9efa | 920 | unsigned long flags; |
19a15b93 | 921 | |
9aad8125 KH |
922 | if (client->buffer.pages) |
923 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
924 | ||
19a15b93 KH |
925 | if (client->iso_context) |
926 | fw_iso_context_destroy(client->iso_context); | |
927 | ||
3964a449 KH |
928 | list_for_each_entry_safe(r, next_r, &client->resource_list, link) |
929 | r->release(client, r); | |
66dea3e5 | 930 | |
28cf6a04 KH |
931 | /* FIXME: We should wait for the async tasklets to stop |
932 | * running before freeing the memory. */ | |
933 | ||
2603bf21 KH |
934 | list_for_each_entry_safe(e, next_e, &client->event_list, link) |
935 | kfree(e); | |
19a15b93 | 936 | |
97bd9efa KH |
937 | spin_lock_irqsave(&client->device->card->lock, flags); |
938 | list_del(&client->link); | |
939 | spin_unlock_irqrestore(&client->device->card->lock, flags); | |
940 | ||
19a15b93 KH |
941 | fw_device_put(client->device); |
942 | kfree(client); | |
943 | ||
944 | return 0; | |
945 | } | |
946 | ||
947 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
948 | { | |
949 | struct client *client = file->private_data; | |
2603bf21 | 950 | unsigned int mask = 0; |
19a15b93 KH |
951 | |
952 | poll_wait(file, &client->wait, pt); | |
953 | ||
2603bf21 KH |
954 | if (fw_device_is_shutdown(client->device)) |
955 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 956 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
957 | mask |= POLLIN | POLLRDNORM; |
958 | ||
959 | return mask; | |
19a15b93 KH |
960 | } |
961 | ||
21ebcd12 | 962 | const struct file_operations fw_device_ops = { |
19a15b93 KH |
963 | .owner = THIS_MODULE, |
964 | .open = fw_device_op_open, | |
965 | .read = fw_device_op_read, | |
966 | .unlocked_ioctl = fw_device_op_ioctl, | |
967 | .poll = fw_device_op_poll, | |
968 | .release = fw_device_op_release, | |
969 | .mmap = fw_device_op_mmap, | |
970 | ||
971 | #ifdef CONFIG_COMPAT | |
5af4e5ea | 972 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
973 | #endif |
974 | }; |