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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; |
da8ecffa | 82 | u64 bus_reset_closure; |
9aad8125 | 83 | |
19a15b93 | 84 | struct fw_iso_context *iso_context; |
9aad8125 KH |
85 | struct fw_iso_buffer buffer; |
86 | unsigned long vm_start; | |
97bd9efa KH |
87 | |
88 | struct list_head link; | |
19a15b93 KH |
89 | }; |
90 | ||
91 | static inline void __user * | |
92 | u64_to_uptr(__u64 value) | |
93 | { | |
94 | return (void __user *)(unsigned long)value; | |
95 | } | |
96 | ||
97 | static inline __u64 | |
98 | uptr_to_u64(void __user *ptr) | |
99 | { | |
100 | return (__u64)(unsigned long)ptr; | |
101 | } | |
102 | ||
103 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
104 | { | |
105 | struct fw_device *device; | |
106 | struct client *client; | |
97bd9efa | 107 | unsigned long flags; |
19a15b93 | 108 | |
a3aca3da KH |
109 | device = fw_device_from_devt(inode->i_rdev); |
110 | if (device == NULL) | |
111 | return -ENODEV; | |
19a15b93 KH |
112 | |
113 | client = kzalloc(sizeof *client, GFP_KERNEL); | |
114 | if (client == NULL) | |
115 | return -ENOMEM; | |
116 | ||
117 | client->device = fw_device_get(device); | |
118 | INIT_LIST_HEAD(&client->event_list); | |
19a15b93 KH |
119 | INIT_LIST_HEAD(&client->handler_list); |
120 | INIT_LIST_HEAD(&client->request_list); | |
28cf6a04 | 121 | INIT_LIST_HEAD(&client->transaction_list); |
19a15b93 KH |
122 | spin_lock_init(&client->lock); |
123 | init_waitqueue_head(&client->wait); | |
124 | ||
125 | file->private_data = client; | |
126 | ||
97bd9efa KH |
127 | spin_lock_irqsave(&device->card->lock, flags); |
128 | list_add_tail(&client->link, &device->client_list); | |
129 | spin_unlock_irqrestore(&device->card->lock, flags); | |
130 | ||
19a15b93 KH |
131 | return 0; |
132 | } | |
133 | ||
134 | static void queue_event(struct client *client, struct event *event, | |
135 | void *data0, size_t size0, void *data1, size_t size1) | |
136 | { | |
137 | unsigned long flags; | |
138 | ||
139 | event->v[0].data = data0; | |
140 | event->v[0].size = size0; | |
141 | event->v[1].data = data1; | |
142 | event->v[1].size = size1; | |
143 | ||
144 | spin_lock_irqsave(&client->lock, flags); | |
145 | ||
146 | list_add_tail(&event->link, &client->event_list); | |
19a15b93 KH |
147 | wake_up_interruptible(&client->wait); |
148 | ||
149 | spin_unlock_irqrestore(&client->lock, flags); | |
150 | } | |
151 | ||
2603bf21 KH |
152 | static int |
153 | dequeue_event(struct client *client, char __user *buffer, size_t count) | |
19a15b93 KH |
154 | { |
155 | unsigned long flags; | |
156 | struct event *event; | |
157 | size_t size, total; | |
2603bf21 | 158 | int i, retval; |
19a15b93 | 159 | |
2603bf21 KH |
160 | retval = wait_event_interruptible(client->wait, |
161 | !list_empty(&client->event_list) || | |
162 | fw_device_is_shutdown(client->device)); | |
163 | if (retval < 0) | |
164 | return retval; | |
19a15b93 | 165 | |
2603bf21 KH |
166 | if (list_empty(&client->event_list) && |
167 | fw_device_is_shutdown(client->device)) | |
168 | return -ENODEV; | |
19a15b93 | 169 | |
2603bf21 | 170 | spin_lock_irqsave(&client->lock, flags); |
19a15b93 KH |
171 | event = container_of(client->event_list.next, struct event, link); |
172 | list_del(&event->link); | |
19a15b93 KH |
173 | spin_unlock_irqrestore(&client->lock, flags); |
174 | ||
19a15b93 KH |
175 | total = 0; |
176 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
177 | size = min(event->v[i].size, count - total); | |
2603bf21 KH |
178 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
179 | retval = -EFAULT; | |
19a15b93 | 180 | goto out; |
2603bf21 | 181 | } |
19a15b93 KH |
182 | total += size; |
183 | } | |
184 | retval = total; | |
185 | ||
186 | out: | |
187 | kfree(event); | |
188 | ||
189 | return retval; | |
190 | } | |
191 | ||
192 | static ssize_t | |
193 | fw_device_op_read(struct file *file, | |
194 | char __user *buffer, size_t count, loff_t *offset) | |
195 | { | |
196 | struct client *client = file->private_data; | |
197 | ||
198 | return dequeue_event(client, buffer, count); | |
199 | } | |
200 | ||
344bbc4d KH |
201 | static void |
202 | fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, | |
da8ecffa | 203 | struct client *client) |
344bbc4d | 204 | { |
da8ecffa | 205 | struct fw_card *card = client->device->card; |
344bbc4d | 206 | |
da8ecffa | 207 | event->closure = client->bus_reset_closure; |
344bbc4d | 208 | event->type = FW_CDEV_EVENT_BUS_RESET; |
da8ecffa | 209 | event->node_id = client->device->node_id; |
344bbc4d KH |
210 | event->local_node_id = card->local_node->node_id; |
211 | event->bm_node_id = 0; /* FIXME: We don't track the BM. */ | |
212 | event->irm_node_id = card->irm_node->node_id; | |
213 | event->root_node_id = card->root_node->node_id; | |
214 | event->generation = card->generation; | |
215 | } | |
216 | ||
2603bf21 KH |
217 | static void |
218 | for_each_client(struct fw_device *device, | |
219 | void (*callback)(struct client *client)) | |
220 | { | |
221 | struct fw_card *card = device->card; | |
222 | struct client *c; | |
223 | unsigned long flags; | |
224 | ||
225 | spin_lock_irqsave(&card->lock, flags); | |
226 | ||
227 | list_for_each_entry(c, &device->client_list, link) | |
228 | callback(c); | |
229 | ||
230 | spin_unlock_irqrestore(&card->lock, flags); | |
231 | } | |
232 | ||
97bd9efa KH |
233 | static void |
234 | queue_bus_reset_event(struct client *client) | |
235 | { | |
236 | struct bus_reset *bus_reset; | |
97bd9efa KH |
237 | |
238 | bus_reset = kzalloc(sizeof *bus_reset, GFP_ATOMIC); | |
239 | if (bus_reset == NULL) { | |
240 | fw_notify("Out of memory when allocating bus reset event\n"); | |
241 | return; | |
242 | } | |
243 | ||
da8ecffa | 244 | fill_bus_reset_event(&bus_reset->reset, client); |
97bd9efa KH |
245 | |
246 | queue_event(client, &bus_reset->event, | |
247 | &bus_reset->reset, sizeof bus_reset->reset, NULL, 0); | |
248 | } | |
249 | ||
250 | void fw_device_cdev_update(struct fw_device *device) | |
251 | { | |
2603bf21 KH |
252 | for_each_client(device, queue_bus_reset_event); |
253 | } | |
97bd9efa | 254 | |
2603bf21 KH |
255 | static void wake_up_client(struct client *client) |
256 | { | |
257 | wake_up_interruptible(&client->wait); | |
258 | } | |
97bd9efa | 259 | |
2603bf21 KH |
260 | void fw_device_cdev_remove(struct fw_device *device) |
261 | { | |
262 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
263 | } |
264 | ||
344bbc4d | 265 | static int ioctl_get_info(struct client *client, void __user *arg) |
19a15b93 | 266 | { |
344bbc4d KH |
267 | struct fw_cdev_get_info get_info; |
268 | struct fw_cdev_event_bus_reset bus_reset; | |
269 | ||
270 | if (copy_from_user(&get_info, arg, sizeof get_info)) | |
271 | return -EFAULT; | |
272 | ||
273 | client->version = get_info.version; | |
274 | get_info.version = FW_CDEV_VERSION; | |
275 | ||
276 | if (get_info.rom != 0) { | |
277 | void __user *uptr = u64_to_uptr(get_info.rom); | |
d84702a5 SR |
278 | size_t want = get_info.rom_length; |
279 | size_t have = client->device->config_rom_length * 4; | |
344bbc4d | 280 | |
d84702a5 SR |
281 | if (copy_to_user(uptr, client->device->config_rom, |
282 | min(want, have))) | |
344bbc4d KH |
283 | return -EFAULT; |
284 | } | |
285 | get_info.rom_length = client->device->config_rom_length * 4; | |
286 | ||
da8ecffa | 287 | client->bus_reset_closure = get_info.bus_reset_closure; |
344bbc4d KH |
288 | if (get_info.bus_reset != 0) { |
289 | void __user *uptr = u64_to_uptr(get_info.bus_reset); | |
290 | ||
da8ecffa | 291 | fill_bus_reset_event(&bus_reset, client); |
344bbc4d KH |
292 | if (copy_to_user(uptr, &bus_reset, sizeof bus_reset)) |
293 | return -EFAULT; | |
294 | } | |
19a15b93 | 295 | |
e7533505 KH |
296 | get_info.card = client->device->card->index; |
297 | ||
344bbc4d | 298 | if (copy_to_user(arg, &get_info, sizeof get_info)) |
19a15b93 KH |
299 | return -EFAULT; |
300 | ||
301 | return 0; | |
302 | } | |
303 | ||
304 | static void | |
305 | complete_transaction(struct fw_card *card, int rcode, | |
306 | void *payload, size_t length, void *data) | |
307 | { | |
308 | struct response *response = data; | |
309 | struct client *client = response->client; | |
28cf6a04 | 310 | unsigned long flags; |
19a15b93 KH |
311 | |
312 | if (length < response->response.length) | |
313 | response->response.length = length; | |
314 | if (rcode == RCODE_COMPLETE) | |
315 | memcpy(response->response.data, payload, | |
316 | response->response.length); | |
317 | ||
28cf6a04 KH |
318 | spin_lock_irqsave(&client->lock, flags); |
319 | list_del(&response->link); | |
320 | spin_unlock_irqrestore(&client->lock, flags); | |
321 | ||
19a15b93 KH |
322 | response->response.type = FW_CDEV_EVENT_RESPONSE; |
323 | response->response.rcode = rcode; | |
324 | queue_event(client, &response->event, | |
325 | &response->response, sizeof response->response, | |
326 | response->response.data, response->response.length); | |
327 | } | |
328 | ||
329 | static ssize_t ioctl_send_request(struct client *client, void __user *arg) | |
330 | { | |
331 | struct fw_device *device = client->device; | |
332 | struct fw_cdev_send_request request; | |
333 | struct response *response; | |
28cf6a04 | 334 | unsigned long flags; |
19a15b93 KH |
335 | |
336 | if (copy_from_user(&request, arg, sizeof request)) | |
337 | return -EFAULT; | |
338 | ||
339 | /* What is the biggest size we'll accept, really? */ | |
340 | if (request.length > 4096) | |
341 | return -EINVAL; | |
342 | ||
343 | response = kmalloc(sizeof *response + request.length, GFP_KERNEL); | |
344 | if (response == NULL) | |
345 | return -ENOMEM; | |
346 | ||
347 | response->client = client; | |
348 | response->response.length = request.length; | |
349 | response->response.closure = request.closure; | |
350 | ||
351 | if (request.data && | |
352 | copy_from_user(response->response.data, | |
353 | u64_to_uptr(request.data), request.length)) { | |
354 | kfree(response); | |
355 | return -EFAULT; | |
356 | } | |
357 | ||
28cf6a04 KH |
358 | spin_lock_irqsave(&client->lock, flags); |
359 | list_add_tail(&response->link, &client->transaction_list); | |
360 | spin_unlock_irqrestore(&client->lock, flags); | |
361 | ||
19a15b93 | 362 | fw_send_request(device->card, &response->transaction, |
344bbc4d | 363 | request.tcode & 0x1f, |
907293d7 | 364 | device->node->node_id, |
97e35275 | 365 | request.generation, |
19a15b93 KH |
366 | device->node->max_speed, |
367 | request.offset, | |
368 | response->response.data, request.length, | |
369 | complete_transaction, response); | |
370 | ||
371 | if (request.data) | |
372 | return sizeof request + request.length; | |
373 | else | |
374 | return sizeof request; | |
375 | } | |
376 | ||
377 | struct address_handler { | |
378 | struct fw_address_handler handler; | |
379 | __u64 closure; | |
380 | struct client *client; | |
381 | struct list_head link; | |
382 | }; | |
383 | ||
384 | struct request { | |
385 | struct fw_request *request; | |
386 | void *data; | |
387 | size_t length; | |
388 | u32 serial; | |
389 | struct list_head link; | |
390 | }; | |
391 | ||
392 | struct request_event { | |
393 | struct event event; | |
394 | struct fw_cdev_event_request request; | |
395 | }; | |
396 | ||
397 | static void | |
398 | handle_request(struct fw_card *card, struct fw_request *r, | |
399 | int tcode, int destination, int source, | |
400 | int generation, int speed, | |
401 | unsigned long long offset, | |
402 | void *payload, size_t length, void *callback_data) | |
403 | { | |
404 | struct address_handler *handler = callback_data; | |
405 | struct request *request; | |
406 | struct request_event *e; | |
407 | unsigned long flags; | |
408 | struct client *client = handler->client; | |
409 | ||
410 | request = kmalloc(sizeof *request, GFP_ATOMIC); | |
411 | e = kmalloc(sizeof *e, GFP_ATOMIC); | |
412 | if (request == NULL || e == NULL) { | |
413 | kfree(request); | |
414 | kfree(e); | |
415 | fw_send_response(card, r, RCODE_CONFLICT_ERROR); | |
416 | return; | |
417 | } | |
418 | ||
419 | request->request = r; | |
420 | request->data = payload; | |
421 | request->length = length; | |
422 | ||
423 | spin_lock_irqsave(&client->lock, flags); | |
424 | request->serial = client->request_serial++; | |
425 | list_add_tail(&request->link, &client->request_list); | |
426 | spin_unlock_irqrestore(&client->lock, flags); | |
427 | ||
428 | e->request.type = FW_CDEV_EVENT_REQUEST; | |
429 | e->request.tcode = tcode; | |
430 | e->request.offset = offset; | |
431 | e->request.length = length; | |
432 | e->request.serial = request->serial; | |
433 | e->request.closure = handler->closure; | |
434 | ||
435 | queue_event(client, &e->event, | |
436 | &e->request, sizeof e->request, payload, length); | |
437 | } | |
438 | ||
439 | static int ioctl_allocate(struct client *client, void __user *arg) | |
440 | { | |
441 | struct fw_cdev_allocate request; | |
442 | struct address_handler *handler; | |
443 | unsigned long flags; | |
444 | struct fw_address_region region; | |
445 | ||
446 | if (copy_from_user(&request, arg, sizeof request)) | |
447 | return -EFAULT; | |
448 | ||
449 | handler = kmalloc(sizeof *handler, GFP_KERNEL); | |
450 | if (handler == NULL) | |
451 | return -ENOMEM; | |
452 | ||
453 | region.start = request.offset; | |
454 | region.end = request.offset + request.length; | |
455 | handler->handler.length = request.length; | |
456 | handler->handler.address_callback = handle_request; | |
457 | handler->handler.callback_data = handler; | |
458 | handler->closure = request.closure; | |
459 | handler->client = client; | |
460 | ||
461 | if (fw_core_add_address_handler(&handler->handler, ®ion) < 0) { | |
462 | kfree(handler); | |
463 | return -EBUSY; | |
464 | } | |
465 | ||
466 | spin_lock_irqsave(&client->lock, flags); | |
467 | list_add_tail(&handler->link, &client->handler_list); | |
468 | spin_unlock_irqrestore(&client->lock, flags); | |
469 | ||
470 | return 0; | |
471 | } | |
472 | ||
9472316b KH |
473 | static int ioctl_deallocate(struct client *client, void __user *arg) |
474 | { | |
475 | struct fw_cdev_deallocate request; | |
476 | struct address_handler *handler; | |
477 | unsigned long flags; | |
478 | ||
479 | if (copy_from_user(&request, arg, sizeof request)) | |
480 | return -EFAULT; | |
481 | ||
482 | spin_lock_irqsave(&client->lock, flags); | |
483 | list_for_each_entry(handler, &client->handler_list, link) { | |
484 | if (handler->handler.offset == request.offset) { | |
485 | list_del(&handler->link); | |
486 | break; | |
487 | } | |
488 | } | |
489 | spin_unlock_irqrestore(&client->lock, flags); | |
490 | ||
491 | if (&handler->link == &client->handler_list) | |
492 | return -EINVAL; | |
493 | ||
494 | fw_core_remove_address_handler(&handler->handler); | |
495 | ||
496 | return 0; | |
497 | } | |
498 | ||
19a15b93 KH |
499 | static int ioctl_send_response(struct client *client, void __user *arg) |
500 | { | |
501 | struct fw_cdev_send_response request; | |
502 | struct request *r; | |
503 | unsigned long flags; | |
504 | ||
505 | if (copy_from_user(&request, arg, sizeof request)) | |
506 | return -EFAULT; | |
507 | ||
508 | spin_lock_irqsave(&client->lock, flags); | |
509 | list_for_each_entry(r, &client->request_list, link) { | |
510 | if (r->serial == request.serial) { | |
511 | list_del(&r->link); | |
512 | break; | |
513 | } | |
514 | } | |
515 | spin_unlock_irqrestore(&client->lock, flags); | |
516 | ||
517 | if (&r->link == &client->request_list) | |
518 | return -EINVAL; | |
519 | ||
520 | if (request.length < r->length) | |
521 | r->length = request.length; | |
522 | if (copy_from_user(r->data, u64_to_uptr(request.data), r->length)) | |
523 | return -EFAULT; | |
524 | ||
525 | fw_send_response(client->device->card, r->request, request.rcode); | |
526 | ||
527 | kfree(r); | |
528 | ||
529 | return 0; | |
530 | } | |
531 | ||
5371842b KH |
532 | static int ioctl_initiate_bus_reset(struct client *client, void __user *arg) |
533 | { | |
534 | struct fw_cdev_initiate_bus_reset request; | |
535 | int short_reset; | |
536 | ||
537 | if (copy_from_user(&request, arg, sizeof request)) | |
538 | return -EFAULT; | |
539 | ||
540 | short_reset = (request.type == FW_CDEV_SHORT_RESET); | |
541 | ||
542 | return fw_core_initiate_bus_reset(client->device->card, short_reset); | |
543 | } | |
544 | ||
19a15b93 | 545 | static void |
9b32d5f3 KH |
546 | iso_callback(struct fw_iso_context *context, u32 cycle, |
547 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
548 | { |
549 | struct client *client = data; | |
550 | struct iso_interrupt *interrupt; | |
551 | ||
9b32d5f3 | 552 | interrupt = kzalloc(sizeof *interrupt + header_length, GFP_ATOMIC); |
19a15b93 KH |
553 | if (interrupt == NULL) |
554 | return; | |
555 | ||
556 | interrupt->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; | |
557 | interrupt->interrupt.closure = 0; | |
558 | interrupt->interrupt.cycle = cycle; | |
9b32d5f3 KH |
559 | interrupt->interrupt.header_length = header_length; |
560 | memcpy(interrupt->interrupt.header, header, header_length); | |
19a15b93 | 561 | queue_event(client, &interrupt->event, |
9b32d5f3 KH |
562 | &interrupt->interrupt, |
563 | sizeof interrupt->interrupt + header_length, NULL, 0); | |
19a15b93 KH |
564 | } |
565 | ||
566 | static int ioctl_create_iso_context(struct client *client, void __user *arg) | |
567 | { | |
568 | struct fw_cdev_create_iso_context request; | |
569 | ||
570 | if (copy_from_user(&request, arg, sizeof request)) | |
571 | return -EFAULT; | |
572 | ||
21efb3cf KH |
573 | if (request.channel > 63) |
574 | return -EINVAL; | |
575 | ||
c70dc788 KH |
576 | switch (request.type) { |
577 | case FW_ISO_CONTEXT_RECEIVE: | |
c70dc788 KH |
578 | if (request.header_size < 4 || (request.header_size & 3)) |
579 | return -EINVAL; | |
98b6cbe8 | 580 | |
c70dc788 KH |
581 | break; |
582 | ||
583 | case FW_ISO_CONTEXT_TRANSMIT: | |
584 | if (request.speed > SCODE_3200) | |
585 | return -EINVAL; | |
586 | ||
587 | break; | |
588 | ||
589 | default: | |
21efb3cf | 590 | return -EINVAL; |
c70dc788 KH |
591 | } |
592 | ||
19a15b93 | 593 | client->iso_context = fw_iso_context_create(client->device->card, |
295e3feb | 594 | request.type, |
21efb3cf KH |
595 | request.channel, |
596 | request.speed, | |
8fbdbb36 | 597 | request.header_size, |
19a15b93 KH |
598 | iso_callback, client); |
599 | if (IS_ERR(client->iso_context)) | |
600 | return PTR_ERR(client->iso_context); | |
601 | ||
602 | return 0; | |
603 | } | |
604 | ||
605 | static int ioctl_queue_iso(struct client *client, void __user *arg) | |
606 | { | |
607 | struct fw_cdev_queue_iso request; | |
608 | struct fw_cdev_iso_packet __user *p, *end, *next; | |
9b32d5f3 | 609 | struct fw_iso_context *ctx = client->iso_context; |
295e3feb | 610 | unsigned long payload, payload_end, header_length; |
19a15b93 KH |
611 | int count; |
612 | struct { | |
613 | struct fw_iso_packet packet; | |
614 | u8 header[256]; | |
615 | } u; | |
616 | ||
9b32d5f3 | 617 | if (ctx == NULL) |
19a15b93 KH |
618 | return -EINVAL; |
619 | if (copy_from_user(&request, arg, sizeof request)) | |
620 | return -EFAULT; | |
621 | ||
622 | /* If the user passes a non-NULL data pointer, has mmap()'ed | |
623 | * the iso buffer, and the pointer points inside the buffer, | |
624 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 625 | * set them both to 0, which will still let packets with |
19a15b93 KH |
626 | * payload_length == 0 through. In other words, if no packets |
627 | * use the indirect payload, the iso buffer need not be mapped | |
628 | * and the request.data pointer is ignored.*/ | |
629 | ||
9aad8125 KH |
630 | payload = (unsigned long)request.data - client->vm_start; |
631 | payload_end = payload + (client->buffer.page_count << PAGE_SHIFT); | |
632 | if (request.data == 0 || client->buffer.pages == NULL || | |
633 | payload >= payload_end) { | |
634 | payload = 0; | |
635 | payload_end = 0; | |
19a15b93 KH |
636 | } |
637 | ||
638 | if (!access_ok(VERIFY_READ, request.packets, request.size)) | |
639 | return -EFAULT; | |
640 | ||
641 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(request.packets); | |
642 | end = (void __user *)p + request.size; | |
643 | count = 0; | |
644 | while (p < end) { | |
645 | if (__copy_from_user(&u.packet, p, sizeof *p)) | |
646 | return -EFAULT; | |
295e3feb | 647 | |
9b32d5f3 | 648 | if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) { |
295e3feb KH |
649 | header_length = u.packet.header_length; |
650 | } else { | |
651 | /* We require that header_length is a multiple of | |
652 | * the fixed header size, ctx->header_size */ | |
9b32d5f3 KH |
653 | if (ctx->header_size == 0) { |
654 | if (u.packet.header_length > 0) | |
655 | return -EINVAL; | |
656 | } else if (u.packet.header_length % ctx->header_size != 0) { | |
295e3feb | 657 | return -EINVAL; |
9b32d5f3 | 658 | } |
295e3feb KH |
659 | header_length = 0; |
660 | } | |
661 | ||
19a15b93 | 662 | next = (struct fw_cdev_iso_packet __user *) |
295e3feb | 663 | &p->header[header_length / 4]; |
19a15b93 KH |
664 | if (next > end) |
665 | return -EINVAL; | |
666 | if (__copy_from_user | |
295e3feb | 667 | (u.packet.header, p->header, header_length)) |
19a15b93 | 668 | return -EFAULT; |
98b6cbe8 | 669 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
670 | u.packet.header_length + u.packet.payload_length > 0) |
671 | return -EINVAL; | |
672 | if (payload + u.packet.payload_length > payload_end) | |
673 | return -EINVAL; | |
674 | ||
9b32d5f3 KH |
675 | if (fw_iso_context_queue(ctx, &u.packet, |
676 | &client->buffer, payload)) | |
19a15b93 KH |
677 | break; |
678 | ||
679 | p = next; | |
680 | payload += u.packet.payload_length; | |
681 | count++; | |
682 | } | |
683 | ||
684 | request.size -= uptr_to_u64(p) - request.packets; | |
685 | request.packets = uptr_to_u64(p); | |
9aad8125 | 686 | request.data = client->vm_start + payload; |
19a15b93 KH |
687 | |
688 | if (copy_to_user(arg, &request, sizeof request)) | |
689 | return -EFAULT; | |
690 | ||
691 | return count; | |
692 | } | |
693 | ||
69cdb726 | 694 | static int ioctl_start_iso(struct client *client, void __user *arg) |
19a15b93 | 695 | { |
69cdb726 | 696 | struct fw_cdev_start_iso request; |
19a15b93 KH |
697 | |
698 | if (copy_from_user(&request, arg, sizeof request)) | |
699 | return -EFAULT; | |
700 | ||
eb0306ea KH |
701 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE) { |
702 | if (request.tags == 0 || request.tags > 15) | |
703 | return -EINVAL; | |
704 | ||
705 | if (request.sync > 15) | |
706 | return -EINVAL; | |
707 | } | |
708 | ||
709 | return fw_iso_context_start(client->iso_context, | |
710 | request.cycle, request.sync, request.tags); | |
19a15b93 KH |
711 | } |
712 | ||
b8295668 KH |
713 | static int ioctl_stop_iso(struct client *client, void __user *arg) |
714 | { | |
715 | return fw_iso_context_stop(client->iso_context); | |
716 | } | |
717 | ||
19a15b93 KH |
718 | static int |
719 | dispatch_ioctl(struct client *client, unsigned int cmd, void __user *arg) | |
720 | { | |
721 | switch (cmd) { | |
344bbc4d KH |
722 | case FW_CDEV_IOC_GET_INFO: |
723 | return ioctl_get_info(client, arg); | |
19a15b93 KH |
724 | case FW_CDEV_IOC_SEND_REQUEST: |
725 | return ioctl_send_request(client, arg); | |
726 | case FW_CDEV_IOC_ALLOCATE: | |
727 | return ioctl_allocate(client, arg); | |
9472316b KH |
728 | case FW_CDEV_IOC_DEALLOCATE: |
729 | return ioctl_deallocate(client, arg); | |
19a15b93 KH |
730 | case FW_CDEV_IOC_SEND_RESPONSE: |
731 | return ioctl_send_response(client, arg); | |
5371842b KH |
732 | case FW_CDEV_IOC_INITIATE_BUS_RESET: |
733 | return ioctl_initiate_bus_reset(client, arg); | |
19a15b93 KH |
734 | case FW_CDEV_IOC_CREATE_ISO_CONTEXT: |
735 | return ioctl_create_iso_context(client, arg); | |
736 | case FW_CDEV_IOC_QUEUE_ISO: | |
737 | return ioctl_queue_iso(client, arg); | |
69cdb726 KH |
738 | case FW_CDEV_IOC_START_ISO: |
739 | return ioctl_start_iso(client, arg); | |
b8295668 KH |
740 | case FW_CDEV_IOC_STOP_ISO: |
741 | return ioctl_stop_iso(client, arg); | |
19a15b93 KH |
742 | default: |
743 | return -EINVAL; | |
744 | } | |
745 | } | |
746 | ||
747 | static long | |
748 | fw_device_op_ioctl(struct file *file, | |
749 | unsigned int cmd, unsigned long arg) | |
750 | { | |
751 | struct client *client = file->private_data; | |
752 | ||
753 | return dispatch_ioctl(client, cmd, (void __user *) arg); | |
754 | } | |
755 | ||
756 | #ifdef CONFIG_COMPAT | |
757 | static long | |
758 | fw_device_op_compat_ioctl(struct file *file, | |
759 | unsigned int cmd, unsigned long arg) | |
760 | { | |
761 | struct client *client = file->private_data; | |
762 | ||
763 | return dispatch_ioctl(client, cmd, compat_ptr(arg)); | |
764 | } | |
765 | #endif | |
766 | ||
767 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
768 | { | |
769 | struct client *client = file->private_data; | |
9aad8125 KH |
770 | enum dma_data_direction direction; |
771 | unsigned long size; | |
772 | int page_count, retval; | |
773 | ||
774 | /* FIXME: We could support multiple buffers, but we don't. */ | |
775 | if (client->buffer.pages != NULL) | |
776 | return -EBUSY; | |
777 | ||
778 | if (!(vma->vm_flags & VM_SHARED)) | |
779 | return -EINVAL; | |
19a15b93 | 780 | |
9aad8125 | 781 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
782 | return -EINVAL; |
783 | ||
784 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
785 | size = vma->vm_end - vma->vm_start; |
786 | page_count = size >> PAGE_SHIFT; | |
787 | if (size & ~PAGE_MASK) | |
788 | return -EINVAL; | |
789 | ||
790 | if (vma->vm_flags & VM_WRITE) | |
791 | direction = DMA_TO_DEVICE; | |
792 | else | |
793 | direction = DMA_FROM_DEVICE; | |
794 | ||
795 | retval = fw_iso_buffer_init(&client->buffer, client->device->card, | |
796 | page_count, direction); | |
797 | if (retval < 0) | |
798 | return retval; | |
19a15b93 | 799 | |
9aad8125 KH |
800 | retval = fw_iso_buffer_map(&client->buffer, vma); |
801 | if (retval < 0) | |
802 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
803 | ||
804 | return retval; | |
19a15b93 KH |
805 | } |
806 | ||
807 | static int fw_device_op_release(struct inode *inode, struct file *file) | |
808 | { | |
809 | struct client *client = file->private_data; | |
2603bf21 | 810 | struct address_handler *h, *next_h; |
19a15b93 | 811 | struct request *r, *next_r; |
2603bf21 | 812 | struct event *e, *next_e; |
28cf6a04 | 813 | struct response *t, *next_t; |
97bd9efa | 814 | unsigned long flags; |
19a15b93 | 815 | |
9aad8125 KH |
816 | if (client->buffer.pages) |
817 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
818 | ||
19a15b93 KH |
819 | if (client->iso_context) |
820 | fw_iso_context_destroy(client->iso_context); | |
821 | ||
2603bf21 | 822 | list_for_each_entry_safe(h, next_h, &client->handler_list, link) { |
19a15b93 KH |
823 | fw_core_remove_address_handler(&h->handler); |
824 | kfree(h); | |
825 | } | |
826 | ||
827 | list_for_each_entry_safe(r, next_r, &client->request_list, link) { | |
828 | fw_send_response(client->device->card, r->request, | |
829 | RCODE_CONFLICT_ERROR); | |
830 | kfree(r); | |
831 | } | |
832 | ||
7e35f7f3 | 833 | list_for_each_entry_safe(t, next_t, &client->transaction_list, link) { |
28cf6a04 | 834 | fw_cancel_transaction(client->device->card, &t->transaction); |
7e35f7f3 KH |
835 | kfree(t); |
836 | } | |
28cf6a04 KH |
837 | |
838 | /* FIXME: We should wait for the async tasklets to stop | |
839 | * running before freeing the memory. */ | |
840 | ||
2603bf21 KH |
841 | list_for_each_entry_safe(e, next_e, &client->event_list, link) |
842 | kfree(e); | |
19a15b93 | 843 | |
97bd9efa KH |
844 | spin_lock_irqsave(&client->device->card->lock, flags); |
845 | list_del(&client->link); | |
846 | spin_unlock_irqrestore(&client->device->card->lock, flags); | |
847 | ||
19a15b93 KH |
848 | fw_device_put(client->device); |
849 | kfree(client); | |
850 | ||
851 | return 0; | |
852 | } | |
853 | ||
854 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
855 | { | |
856 | struct client *client = file->private_data; | |
2603bf21 | 857 | unsigned int mask = 0; |
19a15b93 KH |
858 | |
859 | poll_wait(file, &client->wait, pt); | |
860 | ||
2603bf21 KH |
861 | if (fw_device_is_shutdown(client->device)) |
862 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 863 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
864 | mask |= POLLIN | POLLRDNORM; |
865 | ||
866 | return mask; | |
19a15b93 KH |
867 | } |
868 | ||
21ebcd12 | 869 | const struct file_operations fw_device_ops = { |
19a15b93 KH |
870 | .owner = THIS_MODULE, |
871 | .open = fw_device_op_open, | |
872 | .read = fw_device_op_read, | |
873 | .unlocked_ioctl = fw_device_op_ioctl, | |
874 | .poll = fw_device_op_poll, | |
875 | .release = fw_device_op_release, | |
876 | .mmap = fw_device_op_mmap, | |
877 | ||
878 | #ifdef CONFIG_COMPAT | |
5af4e5ea | 879 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
880 | #endif |
881 | }; |