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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; | |
63 | struct fw_cdev_event_response response; | |
64 | }; | |
65 | ||
66 | struct iso_interrupt { | |
67 | struct event event; | |
68 | struct fw_cdev_event_iso_interrupt interrupt; | |
69 | }; | |
70 | ||
71 | struct client { | |
344bbc4d | 72 | u32 version; |
19a15b93 KH |
73 | struct fw_device *device; |
74 | spinlock_t lock; | |
75 | struct list_head handler_list; | |
76 | struct list_head request_list; | |
77 | u32 request_serial; | |
78 | struct list_head event_list; | |
19a15b93 | 79 | wait_queue_head_t wait; |
9aad8125 | 80 | |
19a15b93 | 81 | struct fw_iso_context *iso_context; |
9aad8125 KH |
82 | struct fw_iso_buffer buffer; |
83 | unsigned long vm_start; | |
97bd9efa KH |
84 | |
85 | struct list_head link; | |
19a15b93 KH |
86 | }; |
87 | ||
88 | static inline void __user * | |
89 | u64_to_uptr(__u64 value) | |
90 | { | |
91 | return (void __user *)(unsigned long)value; | |
92 | } | |
93 | ||
94 | static inline __u64 | |
95 | uptr_to_u64(void __user *ptr) | |
96 | { | |
97 | return (__u64)(unsigned long)ptr; | |
98 | } | |
99 | ||
100 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
101 | { | |
102 | struct fw_device *device; | |
103 | struct client *client; | |
97bd9efa | 104 | unsigned long flags; |
19a15b93 | 105 | |
a3aca3da KH |
106 | device = fw_device_from_devt(inode->i_rdev); |
107 | if (device == NULL) | |
108 | return -ENODEV; | |
19a15b93 KH |
109 | |
110 | client = kzalloc(sizeof *client, GFP_KERNEL); | |
111 | if (client == NULL) | |
112 | return -ENOMEM; | |
113 | ||
114 | client->device = fw_device_get(device); | |
115 | INIT_LIST_HEAD(&client->event_list); | |
19a15b93 KH |
116 | INIT_LIST_HEAD(&client->handler_list); |
117 | INIT_LIST_HEAD(&client->request_list); | |
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, | |
199 | struct fw_device *device) | |
200 | { | |
201 | struct fw_card *card = device->card; | |
202 | ||
203 | event->type = FW_CDEV_EVENT_BUS_RESET; | |
204 | event->node_id = device->node_id; | |
205 | event->local_node_id = card->local_node->node_id; | |
206 | event->bm_node_id = 0; /* FIXME: We don't track the BM. */ | |
207 | event->irm_node_id = card->irm_node->node_id; | |
208 | event->root_node_id = card->root_node->node_id; | |
209 | event->generation = card->generation; | |
210 | } | |
211 | ||
2603bf21 KH |
212 | static void |
213 | for_each_client(struct fw_device *device, | |
214 | void (*callback)(struct client *client)) | |
215 | { | |
216 | struct fw_card *card = device->card; | |
217 | struct client *c; | |
218 | unsigned long flags; | |
219 | ||
220 | spin_lock_irqsave(&card->lock, flags); | |
221 | ||
222 | list_for_each_entry(c, &device->client_list, link) | |
223 | callback(c); | |
224 | ||
225 | spin_unlock_irqrestore(&card->lock, flags); | |
226 | } | |
227 | ||
97bd9efa KH |
228 | static void |
229 | queue_bus_reset_event(struct client *client) | |
230 | { | |
231 | struct bus_reset *bus_reset; | |
232 | struct fw_device *device = client->device; | |
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 | ||
344bbc4d | 240 | fill_bus_reset_event(&bus_reset->reset, device); |
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); | |
274 | size_t length = min(get_info.rom_length, | |
275 | client->device->config_rom_length * 4); | |
276 | ||
277 | if (copy_to_user(uptr, client->device->config_rom, length)) | |
278 | return -EFAULT; | |
279 | } | |
280 | get_info.rom_length = client->device->config_rom_length * 4; | |
281 | ||
282 | if (get_info.bus_reset != 0) { | |
283 | void __user *uptr = u64_to_uptr(get_info.bus_reset); | |
284 | ||
285 | fill_bus_reset_event(&bus_reset, client->device); | |
286 | if (copy_to_user(uptr, &bus_reset, sizeof bus_reset)) | |
287 | return -EFAULT; | |
288 | } | |
19a15b93 | 289 | |
344bbc4d | 290 | if (copy_to_user(arg, &get_info, sizeof get_info)) |
19a15b93 KH |
291 | return -EFAULT; |
292 | ||
293 | return 0; | |
294 | } | |
295 | ||
296 | static void | |
297 | complete_transaction(struct fw_card *card, int rcode, | |
298 | void *payload, size_t length, void *data) | |
299 | { | |
300 | struct response *response = data; | |
301 | struct client *client = response->client; | |
302 | ||
303 | if (length < response->response.length) | |
304 | response->response.length = length; | |
305 | if (rcode == RCODE_COMPLETE) | |
306 | memcpy(response->response.data, payload, | |
307 | response->response.length); | |
308 | ||
309 | response->response.type = FW_CDEV_EVENT_RESPONSE; | |
310 | response->response.rcode = rcode; | |
311 | queue_event(client, &response->event, | |
312 | &response->response, sizeof response->response, | |
313 | response->response.data, response->response.length); | |
314 | } | |
315 | ||
316 | static ssize_t ioctl_send_request(struct client *client, void __user *arg) | |
317 | { | |
318 | struct fw_device *device = client->device; | |
319 | struct fw_cdev_send_request request; | |
320 | struct response *response; | |
321 | ||
322 | if (copy_from_user(&request, arg, sizeof request)) | |
323 | return -EFAULT; | |
324 | ||
325 | /* What is the biggest size we'll accept, really? */ | |
326 | if (request.length > 4096) | |
327 | return -EINVAL; | |
328 | ||
329 | response = kmalloc(sizeof *response + request.length, GFP_KERNEL); | |
330 | if (response == NULL) | |
331 | return -ENOMEM; | |
332 | ||
333 | response->client = client; | |
334 | response->response.length = request.length; | |
335 | response->response.closure = request.closure; | |
336 | ||
337 | if (request.data && | |
338 | copy_from_user(response->response.data, | |
339 | u64_to_uptr(request.data), request.length)) { | |
340 | kfree(response); | |
341 | return -EFAULT; | |
342 | } | |
343 | ||
344 | fw_send_request(device->card, &response->transaction, | |
344bbc4d | 345 | request.tcode & 0x1f, |
907293d7 | 346 | device->node->node_id, |
19a15b93 KH |
347 | device->card->generation, |
348 | device->node->max_speed, | |
349 | request.offset, | |
350 | response->response.data, request.length, | |
351 | complete_transaction, response); | |
352 | ||
353 | if (request.data) | |
354 | return sizeof request + request.length; | |
355 | else | |
356 | return sizeof request; | |
357 | } | |
358 | ||
359 | struct address_handler { | |
360 | struct fw_address_handler handler; | |
361 | __u64 closure; | |
362 | struct client *client; | |
363 | struct list_head link; | |
364 | }; | |
365 | ||
366 | struct request { | |
367 | struct fw_request *request; | |
368 | void *data; | |
369 | size_t length; | |
370 | u32 serial; | |
371 | struct list_head link; | |
372 | }; | |
373 | ||
374 | struct request_event { | |
375 | struct event event; | |
376 | struct fw_cdev_event_request request; | |
377 | }; | |
378 | ||
379 | static void | |
380 | handle_request(struct fw_card *card, struct fw_request *r, | |
381 | int tcode, int destination, int source, | |
382 | int generation, int speed, | |
383 | unsigned long long offset, | |
384 | void *payload, size_t length, void *callback_data) | |
385 | { | |
386 | struct address_handler *handler = callback_data; | |
387 | struct request *request; | |
388 | struct request_event *e; | |
389 | unsigned long flags; | |
390 | struct client *client = handler->client; | |
391 | ||
392 | request = kmalloc(sizeof *request, GFP_ATOMIC); | |
393 | e = kmalloc(sizeof *e, GFP_ATOMIC); | |
394 | if (request == NULL || e == NULL) { | |
395 | kfree(request); | |
396 | kfree(e); | |
397 | fw_send_response(card, r, RCODE_CONFLICT_ERROR); | |
398 | return; | |
399 | } | |
400 | ||
401 | request->request = r; | |
402 | request->data = payload; | |
403 | request->length = length; | |
404 | ||
405 | spin_lock_irqsave(&client->lock, flags); | |
406 | request->serial = client->request_serial++; | |
407 | list_add_tail(&request->link, &client->request_list); | |
408 | spin_unlock_irqrestore(&client->lock, flags); | |
409 | ||
410 | e->request.type = FW_CDEV_EVENT_REQUEST; | |
411 | e->request.tcode = tcode; | |
412 | e->request.offset = offset; | |
413 | e->request.length = length; | |
414 | e->request.serial = request->serial; | |
415 | e->request.closure = handler->closure; | |
416 | ||
417 | queue_event(client, &e->event, | |
418 | &e->request, sizeof e->request, payload, length); | |
419 | } | |
420 | ||
421 | static int ioctl_allocate(struct client *client, void __user *arg) | |
422 | { | |
423 | struct fw_cdev_allocate request; | |
424 | struct address_handler *handler; | |
425 | unsigned long flags; | |
426 | struct fw_address_region region; | |
427 | ||
428 | if (copy_from_user(&request, arg, sizeof request)) | |
429 | return -EFAULT; | |
430 | ||
431 | handler = kmalloc(sizeof *handler, GFP_KERNEL); | |
432 | if (handler == NULL) | |
433 | return -ENOMEM; | |
434 | ||
435 | region.start = request.offset; | |
436 | region.end = request.offset + request.length; | |
437 | handler->handler.length = request.length; | |
438 | handler->handler.address_callback = handle_request; | |
439 | handler->handler.callback_data = handler; | |
440 | handler->closure = request.closure; | |
441 | handler->client = client; | |
442 | ||
443 | if (fw_core_add_address_handler(&handler->handler, ®ion) < 0) { | |
444 | kfree(handler); | |
445 | return -EBUSY; | |
446 | } | |
447 | ||
448 | spin_lock_irqsave(&client->lock, flags); | |
449 | list_add_tail(&handler->link, &client->handler_list); | |
450 | spin_unlock_irqrestore(&client->lock, flags); | |
451 | ||
452 | return 0; | |
453 | } | |
454 | ||
455 | static int ioctl_send_response(struct client *client, void __user *arg) | |
456 | { | |
457 | struct fw_cdev_send_response request; | |
458 | struct request *r; | |
459 | unsigned long flags; | |
460 | ||
461 | if (copy_from_user(&request, arg, sizeof request)) | |
462 | return -EFAULT; | |
463 | ||
464 | spin_lock_irqsave(&client->lock, flags); | |
465 | list_for_each_entry(r, &client->request_list, link) { | |
466 | if (r->serial == request.serial) { | |
467 | list_del(&r->link); | |
468 | break; | |
469 | } | |
470 | } | |
471 | spin_unlock_irqrestore(&client->lock, flags); | |
472 | ||
473 | if (&r->link == &client->request_list) | |
474 | return -EINVAL; | |
475 | ||
476 | if (request.length < r->length) | |
477 | r->length = request.length; | |
478 | if (copy_from_user(r->data, u64_to_uptr(request.data), r->length)) | |
479 | return -EFAULT; | |
480 | ||
481 | fw_send_response(client->device->card, r->request, request.rcode); | |
482 | ||
483 | kfree(r); | |
484 | ||
485 | return 0; | |
486 | } | |
487 | ||
5371842b KH |
488 | static int ioctl_initiate_bus_reset(struct client *client, void __user *arg) |
489 | { | |
490 | struct fw_cdev_initiate_bus_reset request; | |
491 | int short_reset; | |
492 | ||
493 | if (copy_from_user(&request, arg, sizeof request)) | |
494 | return -EFAULT; | |
495 | ||
496 | short_reset = (request.type == FW_CDEV_SHORT_RESET); | |
497 | ||
498 | return fw_core_initiate_bus_reset(client->device->card, short_reset); | |
499 | } | |
500 | ||
19a15b93 | 501 | static void |
9b32d5f3 KH |
502 | iso_callback(struct fw_iso_context *context, u32 cycle, |
503 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
504 | { |
505 | struct client *client = data; | |
506 | struct iso_interrupt *interrupt; | |
507 | ||
9b32d5f3 | 508 | interrupt = kzalloc(sizeof *interrupt + header_length, GFP_ATOMIC); |
19a15b93 KH |
509 | if (interrupt == NULL) |
510 | return; | |
511 | ||
512 | interrupt->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; | |
513 | interrupt->interrupt.closure = 0; | |
514 | interrupt->interrupt.cycle = cycle; | |
9b32d5f3 KH |
515 | interrupt->interrupt.header_length = header_length; |
516 | memcpy(interrupt->interrupt.header, header, header_length); | |
19a15b93 | 517 | queue_event(client, &interrupt->event, |
9b32d5f3 KH |
518 | &interrupt->interrupt, |
519 | sizeof interrupt->interrupt + header_length, NULL, 0); | |
19a15b93 KH |
520 | } |
521 | ||
522 | static int ioctl_create_iso_context(struct client *client, void __user *arg) | |
523 | { | |
524 | struct fw_cdev_create_iso_context request; | |
525 | ||
526 | if (copy_from_user(&request, arg, sizeof request)) | |
527 | return -EFAULT; | |
528 | ||
295e3feb KH |
529 | if (request.type > FW_ISO_CONTEXT_RECEIVE) |
530 | return -EINVAL; | |
531 | ||
21efb3cf KH |
532 | if (request.channel > 63) |
533 | return -EINVAL; | |
534 | ||
98b6cbe8 KH |
535 | if (request.sync > 15) |
536 | return -EINVAL; | |
537 | ||
538 | if (request.tags == 0 || request.tags > 15) | |
539 | return -EINVAL; | |
540 | ||
21efb3cf KH |
541 | if (request.speed > SCODE_3200) |
542 | return -EINVAL; | |
543 | ||
19a15b93 | 544 | client->iso_context = fw_iso_context_create(client->device->card, |
295e3feb | 545 | request.type, |
21efb3cf KH |
546 | request.channel, |
547 | request.speed, | |
295e3feb | 548 | request.header_size, |
98b6cbe8 KH |
549 | request.sync, |
550 | request.tags, | |
19a15b93 KH |
551 | iso_callback, client); |
552 | if (IS_ERR(client->iso_context)) | |
553 | return PTR_ERR(client->iso_context); | |
554 | ||
555 | return 0; | |
556 | } | |
557 | ||
558 | static int ioctl_queue_iso(struct client *client, void __user *arg) | |
559 | { | |
560 | struct fw_cdev_queue_iso request; | |
561 | struct fw_cdev_iso_packet __user *p, *end, *next; | |
9b32d5f3 | 562 | struct fw_iso_context *ctx = client->iso_context; |
295e3feb | 563 | unsigned long payload, payload_end, header_length; |
19a15b93 KH |
564 | int count; |
565 | struct { | |
566 | struct fw_iso_packet packet; | |
567 | u8 header[256]; | |
568 | } u; | |
569 | ||
9b32d5f3 | 570 | if (ctx == NULL) |
19a15b93 KH |
571 | return -EINVAL; |
572 | if (copy_from_user(&request, arg, sizeof request)) | |
573 | return -EFAULT; | |
574 | ||
575 | /* If the user passes a non-NULL data pointer, has mmap()'ed | |
576 | * the iso buffer, and the pointer points inside the buffer, | |
577 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 578 | * set them both to 0, which will still let packets with |
19a15b93 KH |
579 | * payload_length == 0 through. In other words, if no packets |
580 | * use the indirect payload, the iso buffer need not be mapped | |
581 | * and the request.data pointer is ignored.*/ | |
582 | ||
9aad8125 KH |
583 | payload = (unsigned long)request.data - client->vm_start; |
584 | payload_end = payload + (client->buffer.page_count << PAGE_SHIFT); | |
585 | if (request.data == 0 || client->buffer.pages == NULL || | |
586 | payload >= payload_end) { | |
587 | payload = 0; | |
588 | payload_end = 0; | |
19a15b93 KH |
589 | } |
590 | ||
591 | if (!access_ok(VERIFY_READ, request.packets, request.size)) | |
592 | return -EFAULT; | |
593 | ||
594 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(request.packets); | |
595 | end = (void __user *)p + request.size; | |
596 | count = 0; | |
597 | while (p < end) { | |
598 | if (__copy_from_user(&u.packet, p, sizeof *p)) | |
599 | return -EFAULT; | |
295e3feb | 600 | |
9b32d5f3 | 601 | if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) { |
295e3feb KH |
602 | header_length = u.packet.header_length; |
603 | } else { | |
604 | /* We require that header_length is a multiple of | |
605 | * the fixed header size, ctx->header_size */ | |
9b32d5f3 KH |
606 | if (ctx->header_size == 0) { |
607 | if (u.packet.header_length > 0) | |
608 | return -EINVAL; | |
609 | } else if (u.packet.header_length % ctx->header_size != 0) { | |
295e3feb | 610 | return -EINVAL; |
9b32d5f3 | 611 | } |
295e3feb KH |
612 | header_length = 0; |
613 | } | |
614 | ||
19a15b93 | 615 | next = (struct fw_cdev_iso_packet __user *) |
295e3feb | 616 | &p->header[header_length / 4]; |
19a15b93 KH |
617 | if (next > end) |
618 | return -EINVAL; | |
619 | if (__copy_from_user | |
295e3feb | 620 | (u.packet.header, p->header, header_length)) |
19a15b93 | 621 | return -EFAULT; |
98b6cbe8 | 622 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
623 | u.packet.header_length + u.packet.payload_length > 0) |
624 | return -EINVAL; | |
625 | if (payload + u.packet.payload_length > payload_end) | |
626 | return -EINVAL; | |
627 | ||
9b32d5f3 KH |
628 | if (fw_iso_context_queue(ctx, &u.packet, |
629 | &client->buffer, payload)) | |
19a15b93 KH |
630 | break; |
631 | ||
632 | p = next; | |
633 | payload += u.packet.payload_length; | |
634 | count++; | |
635 | } | |
636 | ||
637 | request.size -= uptr_to_u64(p) - request.packets; | |
638 | request.packets = uptr_to_u64(p); | |
9aad8125 | 639 | request.data = client->vm_start + payload; |
19a15b93 KH |
640 | |
641 | if (copy_to_user(arg, &request, sizeof request)) | |
642 | return -EFAULT; | |
643 | ||
644 | return count; | |
645 | } | |
646 | ||
69cdb726 | 647 | static int ioctl_start_iso(struct client *client, void __user *arg) |
19a15b93 | 648 | { |
69cdb726 | 649 | struct fw_cdev_start_iso request; |
19a15b93 KH |
650 | |
651 | if (copy_from_user(&request, arg, sizeof request)) | |
652 | return -EFAULT; | |
653 | ||
21efb3cf | 654 | return fw_iso_context_start(client->iso_context, request.cycle); |
19a15b93 KH |
655 | } |
656 | ||
b8295668 KH |
657 | static int ioctl_stop_iso(struct client *client, void __user *arg) |
658 | { | |
659 | return fw_iso_context_stop(client->iso_context); | |
660 | } | |
661 | ||
19a15b93 KH |
662 | static int |
663 | dispatch_ioctl(struct client *client, unsigned int cmd, void __user *arg) | |
664 | { | |
665 | switch (cmd) { | |
344bbc4d KH |
666 | case FW_CDEV_IOC_GET_INFO: |
667 | return ioctl_get_info(client, arg); | |
19a15b93 KH |
668 | case FW_CDEV_IOC_SEND_REQUEST: |
669 | return ioctl_send_request(client, arg); | |
670 | case FW_CDEV_IOC_ALLOCATE: | |
671 | return ioctl_allocate(client, arg); | |
672 | case FW_CDEV_IOC_SEND_RESPONSE: | |
673 | return ioctl_send_response(client, arg); | |
5371842b KH |
674 | case FW_CDEV_IOC_INITIATE_BUS_RESET: |
675 | return ioctl_initiate_bus_reset(client, arg); | |
19a15b93 KH |
676 | case FW_CDEV_IOC_CREATE_ISO_CONTEXT: |
677 | return ioctl_create_iso_context(client, arg); | |
678 | case FW_CDEV_IOC_QUEUE_ISO: | |
679 | return ioctl_queue_iso(client, arg); | |
69cdb726 KH |
680 | case FW_CDEV_IOC_START_ISO: |
681 | return ioctl_start_iso(client, arg); | |
b8295668 KH |
682 | case FW_CDEV_IOC_STOP_ISO: |
683 | return ioctl_stop_iso(client, arg); | |
19a15b93 KH |
684 | default: |
685 | return -EINVAL; | |
686 | } | |
687 | } | |
688 | ||
689 | static long | |
690 | fw_device_op_ioctl(struct file *file, | |
691 | unsigned int cmd, unsigned long arg) | |
692 | { | |
693 | struct client *client = file->private_data; | |
694 | ||
695 | return dispatch_ioctl(client, cmd, (void __user *) arg); | |
696 | } | |
697 | ||
698 | #ifdef CONFIG_COMPAT | |
699 | static long | |
700 | fw_device_op_compat_ioctl(struct file *file, | |
701 | unsigned int cmd, unsigned long arg) | |
702 | { | |
703 | struct client *client = file->private_data; | |
704 | ||
705 | return dispatch_ioctl(client, cmd, compat_ptr(arg)); | |
706 | } | |
707 | #endif | |
708 | ||
709 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
710 | { | |
711 | struct client *client = file->private_data; | |
9aad8125 KH |
712 | enum dma_data_direction direction; |
713 | unsigned long size; | |
714 | int page_count, retval; | |
715 | ||
716 | /* FIXME: We could support multiple buffers, but we don't. */ | |
717 | if (client->buffer.pages != NULL) | |
718 | return -EBUSY; | |
719 | ||
720 | if (!(vma->vm_flags & VM_SHARED)) | |
721 | return -EINVAL; | |
19a15b93 | 722 | |
9aad8125 | 723 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
724 | return -EINVAL; |
725 | ||
726 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
727 | size = vma->vm_end - vma->vm_start; |
728 | page_count = size >> PAGE_SHIFT; | |
729 | if (size & ~PAGE_MASK) | |
730 | return -EINVAL; | |
731 | ||
732 | if (vma->vm_flags & VM_WRITE) | |
733 | direction = DMA_TO_DEVICE; | |
734 | else | |
735 | direction = DMA_FROM_DEVICE; | |
736 | ||
737 | retval = fw_iso_buffer_init(&client->buffer, client->device->card, | |
738 | page_count, direction); | |
739 | if (retval < 0) | |
740 | return retval; | |
19a15b93 | 741 | |
9aad8125 KH |
742 | retval = fw_iso_buffer_map(&client->buffer, vma); |
743 | if (retval < 0) | |
744 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
745 | ||
746 | return retval; | |
19a15b93 KH |
747 | } |
748 | ||
749 | static int fw_device_op_release(struct inode *inode, struct file *file) | |
750 | { | |
751 | struct client *client = file->private_data; | |
2603bf21 | 752 | struct address_handler *h, *next_h; |
19a15b93 | 753 | struct request *r, *next_r; |
2603bf21 | 754 | struct event *e, *next_e; |
97bd9efa | 755 | unsigned long flags; |
19a15b93 | 756 | |
9aad8125 KH |
757 | if (client->buffer.pages) |
758 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
759 | ||
19a15b93 KH |
760 | if (client->iso_context) |
761 | fw_iso_context_destroy(client->iso_context); | |
762 | ||
2603bf21 | 763 | list_for_each_entry_safe(h, next_h, &client->handler_list, link) { |
19a15b93 KH |
764 | fw_core_remove_address_handler(&h->handler); |
765 | kfree(h); | |
766 | } | |
767 | ||
768 | list_for_each_entry_safe(r, next_r, &client->request_list, link) { | |
769 | fw_send_response(client->device->card, r->request, | |
770 | RCODE_CONFLICT_ERROR); | |
771 | kfree(r); | |
772 | } | |
773 | ||
774 | /* TODO: wait for all transactions to finish so | |
775 | * complete_transaction doesn't try to queue up responses | |
776 | * after we free client. */ | |
2603bf21 KH |
777 | list_for_each_entry_safe(e, next_e, &client->event_list, link) |
778 | kfree(e); | |
19a15b93 | 779 | |
97bd9efa KH |
780 | spin_lock_irqsave(&client->device->card->lock, flags); |
781 | list_del(&client->link); | |
782 | spin_unlock_irqrestore(&client->device->card->lock, flags); | |
783 | ||
19a15b93 KH |
784 | fw_device_put(client->device); |
785 | kfree(client); | |
786 | ||
787 | return 0; | |
788 | } | |
789 | ||
790 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
791 | { | |
792 | struct client *client = file->private_data; | |
2603bf21 | 793 | unsigned int mask = 0; |
19a15b93 KH |
794 | |
795 | poll_wait(file, &client->wait, pt); | |
796 | ||
2603bf21 KH |
797 | if (fw_device_is_shutdown(client->device)) |
798 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 799 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
800 | mask |= POLLIN | POLLRDNORM; |
801 | ||
802 | return mask; | |
19a15b93 KH |
803 | } |
804 | ||
21ebcd12 | 805 | const struct file_operations fw_device_ops = { |
19a15b93 KH |
806 | .owner = THIS_MODULE, |
807 | .open = fw_device_op_open, | |
808 | .read = fw_device_op_read, | |
809 | .unlocked_ioctl = fw_device_op_ioctl, | |
810 | .poll = fw_device_op_poll, | |
811 | .release = fw_device_op_release, | |
812 | .mmap = fw_device_op_mmap, | |
813 | ||
814 | #ifdef CONFIG_COMPAT | |
5af4e5ea | 815 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
816 | #endif |
817 | }; |