Commit | Line | Data |
---|---|---|
c781c06d KH |
1 | /* |
2 | * Char device for device raw access | |
19a15b93 | 3 | * |
c781c06d | 4 | * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> |
19a15b93 KH |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software Foundation, | |
18 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | */ | |
20 | ||
21 | #include <linux/module.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/wait.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/device.h> | |
26 | #include <linux/vmalloc.h> | |
27 | #include <linux/poll.h> | |
a64408b9 SR |
28 | #include <linux/preempt.h> |
29 | #include <linux/time.h> | |
19a15b93 KH |
30 | #include <linux/delay.h> |
31 | #include <linux/mm.h> | |
a3aca3da | 32 | #include <linux/idr.h> |
19a15b93 | 33 | #include <linux/compat.h> |
9640d3d7 | 34 | #include <linux/firewire-cdev.h> |
a64408b9 | 35 | #include <asm/system.h> |
19a15b93 KH |
36 | #include <asm/uaccess.h> |
37 | #include "fw-transaction.h" | |
38 | #include "fw-topology.h" | |
39 | #include "fw-device.h" | |
19a15b93 | 40 | |
3964a449 KH |
41 | struct client; |
42 | struct client_resource { | |
43 | struct list_head link; | |
44 | void (*release)(struct client *client, struct client_resource *r); | |
45 | u32 handle; | |
46 | }; | |
47 | ||
c781c06d KH |
48 | /* |
49 | * dequeue_event() just kfree()'s the event, so the event has to be | |
50 | * the first field in the struct. | |
51 | */ | |
52 | ||
19a15b93 KH |
53 | struct event { |
54 | struct { void *data; size_t size; } v[2]; | |
55 | struct list_head link; | |
56 | }; | |
57 | ||
97bd9efa KH |
58 | struct bus_reset { |
59 | struct event event; | |
60 | struct fw_cdev_event_bus_reset reset; | |
61 | }; | |
62 | ||
19a15b93 KH |
63 | struct response { |
64 | struct event event; | |
65 | struct fw_transaction transaction; | |
66 | struct client *client; | |
3964a449 | 67 | struct client_resource resource; |
19a15b93 KH |
68 | struct fw_cdev_event_response response; |
69 | }; | |
70 | ||
71 | struct iso_interrupt { | |
72 | struct event event; | |
73 | struct fw_cdev_event_iso_interrupt interrupt; | |
74 | }; | |
75 | ||
76 | struct client { | |
344bbc4d | 77 | u32 version; |
19a15b93 KH |
78 | struct fw_device *device; |
79 | spinlock_t lock; | |
66dea3e5 | 80 | u32 resource_handle; |
3964a449 | 81 | struct list_head resource_list; |
19a15b93 | 82 | struct list_head event_list; |
19a15b93 | 83 | wait_queue_head_t wait; |
da8ecffa | 84 | u64 bus_reset_closure; |
9aad8125 | 85 | |
19a15b93 | 86 | struct fw_iso_context *iso_context; |
abaa5743 | 87 | u64 iso_closure; |
9aad8125 KH |
88 | struct fw_iso_buffer buffer; |
89 | unsigned long vm_start; | |
97bd9efa KH |
90 | |
91 | struct list_head link; | |
19a15b93 KH |
92 | }; |
93 | ||
94 | static inline void __user * | |
95 | u64_to_uptr(__u64 value) | |
96 | { | |
97 | return (void __user *)(unsigned long)value; | |
98 | } | |
99 | ||
100 | static inline __u64 | |
101 | uptr_to_u64(void __user *ptr) | |
102 | { | |
103 | return (__u64)(unsigned long)ptr; | |
104 | } | |
105 | ||
106 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
107 | { | |
108 | struct fw_device *device; | |
109 | struct client *client; | |
97bd9efa | 110 | unsigned long flags; |
19a15b93 | 111 | |
96b19062 | 112 | device = fw_device_get_by_devt(inode->i_rdev); |
a3aca3da KH |
113 | if (device == NULL) |
114 | return -ENODEV; | |
19a15b93 | 115 | |
551f4cb9 JF |
116 | if (fw_device_is_shutdown(device)) { |
117 | fw_device_put(device); | |
118 | return -ENODEV; | |
119 | } | |
120 | ||
2d826cc5 | 121 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
96b19062 SR |
122 | if (client == NULL) { |
123 | fw_device_put(device); | |
19a15b93 | 124 | return -ENOMEM; |
96b19062 | 125 | } |
19a15b93 | 126 | |
96b19062 | 127 | client->device = device; |
19a15b93 | 128 | INIT_LIST_HEAD(&client->event_list); |
3964a449 | 129 | INIT_LIST_HEAD(&client->resource_list); |
19a15b93 KH |
130 | spin_lock_init(&client->lock); |
131 | init_waitqueue_head(&client->wait); | |
132 | ||
133 | file->private_data = client; | |
134 | ||
97bd9efa KH |
135 | spin_lock_irqsave(&device->card->lock, flags); |
136 | list_add_tail(&client->link, &device->client_list); | |
137 | spin_unlock_irqrestore(&device->card->lock, flags); | |
138 | ||
19a15b93 KH |
139 | return 0; |
140 | } | |
141 | ||
142 | static void queue_event(struct client *client, struct event *event, | |
143 | void *data0, size_t size0, void *data1, size_t size1) | |
144 | { | |
145 | unsigned long flags; | |
146 | ||
147 | event->v[0].data = data0; | |
148 | event->v[0].size = size0; | |
149 | event->v[1].data = data1; | |
150 | event->v[1].size = size1; | |
151 | ||
152 | spin_lock_irqsave(&client->lock, flags); | |
19a15b93 | 153 | list_add_tail(&event->link, &client->event_list); |
19a15b93 | 154 | spin_unlock_irqrestore(&client->lock, flags); |
83431cba JF |
155 | |
156 | wake_up_interruptible(&client->wait); | |
19a15b93 KH |
157 | } |
158 | ||
2603bf21 KH |
159 | static int |
160 | dequeue_event(struct client *client, char __user *buffer, size_t count) | |
19a15b93 KH |
161 | { |
162 | unsigned long flags; | |
163 | struct event *event; | |
164 | size_t size, total; | |
2603bf21 | 165 | int i, retval; |
19a15b93 | 166 | |
2603bf21 KH |
167 | retval = wait_event_interruptible(client->wait, |
168 | !list_empty(&client->event_list) || | |
169 | fw_device_is_shutdown(client->device)); | |
170 | if (retval < 0) | |
171 | return retval; | |
19a15b93 | 172 | |
2603bf21 KH |
173 | if (list_empty(&client->event_list) && |
174 | fw_device_is_shutdown(client->device)) | |
175 | return -ENODEV; | |
19a15b93 | 176 | |
2603bf21 | 177 | spin_lock_irqsave(&client->lock, flags); |
19a15b93 KH |
178 | event = container_of(client->event_list.next, struct event, link); |
179 | list_del(&event->link); | |
19a15b93 KH |
180 | spin_unlock_irqrestore(&client->lock, flags); |
181 | ||
19a15b93 KH |
182 | total = 0; |
183 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
184 | size = min(event->v[i].size, count - total); | |
2603bf21 KH |
185 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
186 | retval = -EFAULT; | |
19a15b93 | 187 | goto out; |
2603bf21 | 188 | } |
19a15b93 KH |
189 | total += size; |
190 | } | |
191 | retval = total; | |
192 | ||
193 | out: | |
194 | kfree(event); | |
195 | ||
196 | return retval; | |
197 | } | |
198 | ||
199 | static ssize_t | |
200 | fw_device_op_read(struct file *file, | |
201 | char __user *buffer, size_t count, loff_t *offset) | |
202 | { | |
203 | struct client *client = file->private_data; | |
204 | ||
205 | return dequeue_event(client, buffer, count); | |
206 | } | |
207 | ||
5cb84067 | 208 | /* caller must hold card->lock so that node pointers can be dereferenced here */ |
344bbc4d KH |
209 | static void |
210 | fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, | |
da8ecffa | 211 | struct client *client) |
344bbc4d | 212 | { |
da8ecffa | 213 | struct fw_card *card = client->device->card; |
344bbc4d | 214 | |
da8ecffa | 215 | event->closure = client->bus_reset_closure; |
344bbc4d | 216 | event->type = FW_CDEV_EVENT_BUS_RESET; |
cf5a56ac | 217 | event->generation = client->device->generation; |
da8ecffa | 218 | event->node_id = client->device->node_id; |
344bbc4d KH |
219 | event->local_node_id = card->local_node->node_id; |
220 | event->bm_node_id = 0; /* FIXME: We don't track the BM. */ | |
221 | event->irm_node_id = card->irm_node->node_id; | |
222 | event->root_node_id = card->root_node->node_id; | |
344bbc4d KH |
223 | } |
224 | ||
2603bf21 KH |
225 | static void |
226 | for_each_client(struct fw_device *device, | |
227 | void (*callback)(struct client *client)) | |
228 | { | |
229 | struct fw_card *card = device->card; | |
230 | struct client *c; | |
231 | unsigned long flags; | |
232 | ||
233 | spin_lock_irqsave(&card->lock, flags); | |
234 | ||
235 | list_for_each_entry(c, &device->client_list, link) | |
236 | callback(c); | |
237 | ||
238 | spin_unlock_irqrestore(&card->lock, flags); | |
239 | } | |
240 | ||
97bd9efa KH |
241 | static void |
242 | queue_bus_reset_event(struct client *client) | |
243 | { | |
244 | struct bus_reset *bus_reset; | |
97bd9efa | 245 | |
2d826cc5 | 246 | bus_reset = kzalloc(sizeof(*bus_reset), GFP_ATOMIC); |
97bd9efa KH |
247 | if (bus_reset == NULL) { |
248 | fw_notify("Out of memory when allocating bus reset event\n"); | |
249 | return; | |
250 | } | |
251 | ||
da8ecffa | 252 | fill_bus_reset_event(&bus_reset->reset, client); |
97bd9efa KH |
253 | |
254 | queue_event(client, &bus_reset->event, | |
2d826cc5 | 255 | &bus_reset->reset, sizeof(bus_reset->reset), NULL, 0); |
97bd9efa KH |
256 | } |
257 | ||
258 | void fw_device_cdev_update(struct fw_device *device) | |
259 | { | |
2603bf21 KH |
260 | for_each_client(device, queue_bus_reset_event); |
261 | } | |
97bd9efa | 262 | |
2603bf21 KH |
263 | static void wake_up_client(struct client *client) |
264 | { | |
265 | wake_up_interruptible(&client->wait); | |
266 | } | |
97bd9efa | 267 | |
2603bf21 KH |
268 | void fw_device_cdev_remove(struct fw_device *device) |
269 | { | |
270 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
271 | } |
272 | ||
4f259223 | 273 | static int ioctl_get_info(struct client *client, void *buffer) |
19a15b93 | 274 | { |
4f259223 | 275 | struct fw_cdev_get_info *get_info = buffer; |
344bbc4d | 276 | struct fw_cdev_event_bus_reset bus_reset; |
5cb84067 | 277 | struct fw_card *card = client->device->card; |
c9755e14 | 278 | unsigned long ret = 0; |
344bbc4d | 279 | |
4f259223 KH |
280 | client->version = get_info->version; |
281 | get_info->version = FW_CDEV_VERSION; | |
344bbc4d | 282 | |
c9755e14 SR |
283 | down_read(&fw_device_rwsem); |
284 | ||
4f259223 KH |
285 | if (get_info->rom != 0) { |
286 | void __user *uptr = u64_to_uptr(get_info->rom); | |
287 | size_t want = get_info->rom_length; | |
d84702a5 | 288 | size_t have = client->device->config_rom_length * 4; |
344bbc4d | 289 | |
c9755e14 SR |
290 | ret = copy_to_user(uptr, client->device->config_rom, |
291 | min(want, have)); | |
344bbc4d | 292 | } |
4f259223 | 293 | get_info->rom_length = client->device->config_rom_length * 4; |
344bbc4d | 294 | |
c9755e14 SR |
295 | up_read(&fw_device_rwsem); |
296 | ||
297 | if (ret != 0) | |
298 | return -EFAULT; | |
299 | ||
4f259223 KH |
300 | client->bus_reset_closure = get_info->bus_reset_closure; |
301 | if (get_info->bus_reset != 0) { | |
302 | void __user *uptr = u64_to_uptr(get_info->bus_reset); | |
5cb84067 | 303 | unsigned long flags; |
344bbc4d | 304 | |
5cb84067 | 305 | spin_lock_irqsave(&card->lock, flags); |
da8ecffa | 306 | fill_bus_reset_event(&bus_reset, client); |
5cb84067 SR |
307 | spin_unlock_irqrestore(&card->lock, flags); |
308 | ||
2d826cc5 | 309 | if (copy_to_user(uptr, &bus_reset, sizeof(bus_reset))) |
344bbc4d KH |
310 | return -EFAULT; |
311 | } | |
19a15b93 | 312 | |
5cb84067 | 313 | get_info->card = card->index; |
19a15b93 KH |
314 | |
315 | return 0; | |
316 | } | |
317 | ||
3964a449 KH |
318 | static void |
319 | add_client_resource(struct client *client, struct client_resource *resource) | |
320 | { | |
321 | unsigned long flags; | |
322 | ||
323 | spin_lock_irqsave(&client->lock, flags); | |
324 | list_add_tail(&resource->link, &client->resource_list); | |
325 | resource->handle = client->resource_handle++; | |
326 | spin_unlock_irqrestore(&client->lock, flags); | |
327 | } | |
328 | ||
329 | static int | |
330 | release_client_resource(struct client *client, u32 handle, | |
331 | struct client_resource **resource) | |
332 | { | |
333 | struct client_resource *r; | |
334 | unsigned long flags; | |
335 | ||
336 | spin_lock_irqsave(&client->lock, flags); | |
337 | list_for_each_entry(r, &client->resource_list, link) { | |
338 | if (r->handle == handle) { | |
339 | list_del(&r->link); | |
340 | break; | |
341 | } | |
342 | } | |
343 | spin_unlock_irqrestore(&client->lock, flags); | |
344 | ||
345 | if (&r->link == &client->resource_list) | |
346 | return -EINVAL; | |
347 | ||
348 | if (resource) | |
349 | *resource = r; | |
350 | else | |
351 | r->release(client, r); | |
352 | ||
353 | return 0; | |
354 | } | |
355 | ||
356 | static void | |
357 | release_transaction(struct client *client, struct client_resource *resource) | |
358 | { | |
359 | struct response *response = | |
360 | container_of(resource, struct response, resource); | |
361 | ||
362 | fw_cancel_transaction(client->device->card, &response->transaction); | |
363 | } | |
364 | ||
19a15b93 KH |
365 | static void |
366 | complete_transaction(struct fw_card *card, int rcode, | |
367 | void *payload, size_t length, void *data) | |
368 | { | |
369 | struct response *response = data; | |
370 | struct client *client = response->client; | |
28cf6a04 | 371 | unsigned long flags; |
19a15b93 KH |
372 | |
373 | if (length < response->response.length) | |
374 | response->response.length = length; | |
375 | if (rcode == RCODE_COMPLETE) | |
376 | memcpy(response->response.data, payload, | |
377 | response->response.length); | |
378 | ||
28cf6a04 | 379 | spin_lock_irqsave(&client->lock, flags); |
3964a449 | 380 | list_del(&response->resource.link); |
28cf6a04 KH |
381 | spin_unlock_irqrestore(&client->lock, flags); |
382 | ||
19a15b93 KH |
383 | response->response.type = FW_CDEV_EVENT_RESPONSE; |
384 | response->response.rcode = rcode; | |
385 | queue_event(client, &response->event, | |
2d826cc5 | 386 | &response->response, sizeof(response->response), |
19a15b93 KH |
387 | response->response.data, response->response.length); |
388 | } | |
389 | ||
350958f9 | 390 | static int ioctl_send_request(struct client *client, void *buffer) |
19a15b93 KH |
391 | { |
392 | struct fw_device *device = client->device; | |
4f259223 | 393 | struct fw_cdev_send_request *request = buffer; |
19a15b93 KH |
394 | struct response *response; |
395 | ||
19a15b93 | 396 | /* What is the biggest size we'll accept, really? */ |
4f259223 | 397 | if (request->length > 4096) |
19a15b93 KH |
398 | return -EINVAL; |
399 | ||
2d826cc5 | 400 | response = kmalloc(sizeof(*response) + request->length, GFP_KERNEL); |
19a15b93 KH |
401 | if (response == NULL) |
402 | return -ENOMEM; | |
403 | ||
404 | response->client = client; | |
4f259223 KH |
405 | response->response.length = request->length; |
406 | response->response.closure = request->closure; | |
19a15b93 | 407 | |
4f259223 | 408 | if (request->data && |
19a15b93 | 409 | copy_from_user(response->response.data, |
4f259223 | 410 | u64_to_uptr(request->data), request->length)) { |
19a15b93 KH |
411 | kfree(response); |
412 | return -EFAULT; | |
413 | } | |
414 | ||
3964a449 KH |
415 | response->resource.release = release_transaction; |
416 | add_client_resource(client, &response->resource); | |
28cf6a04 | 417 | |
19a15b93 | 418 | fw_send_request(device->card, &response->transaction, |
4f259223 | 419 | request->tcode & 0x1f, |
907293d7 | 420 | device->node->node_id, |
4f259223 | 421 | request->generation, |
f1397490 | 422 | device->max_speed, |
4f259223 KH |
423 | request->offset, |
424 | response->response.data, request->length, | |
19a15b93 KH |
425 | complete_transaction, response); |
426 | ||
4f259223 | 427 | if (request->data) |
2d826cc5 | 428 | return sizeof(request) + request->length; |
19a15b93 | 429 | else |
2d826cc5 | 430 | return sizeof(request); |
19a15b93 KH |
431 | } |
432 | ||
433 | struct address_handler { | |
434 | struct fw_address_handler handler; | |
435 | __u64 closure; | |
436 | struct client *client; | |
3964a449 | 437 | struct client_resource resource; |
19a15b93 KH |
438 | }; |
439 | ||
440 | struct request { | |
441 | struct fw_request *request; | |
442 | void *data; | |
443 | size_t length; | |
3964a449 | 444 | struct client_resource resource; |
19a15b93 KH |
445 | }; |
446 | ||
447 | struct request_event { | |
448 | struct event event; | |
449 | struct fw_cdev_event_request request; | |
450 | }; | |
451 | ||
3964a449 KH |
452 | static void |
453 | release_request(struct client *client, struct client_resource *resource) | |
454 | { | |
455 | struct request *request = | |
456 | container_of(resource, struct request, resource); | |
457 | ||
458 | fw_send_response(client->device->card, request->request, | |
459 | RCODE_CONFLICT_ERROR); | |
460 | kfree(request); | |
461 | } | |
462 | ||
19a15b93 KH |
463 | static void |
464 | handle_request(struct fw_card *card, struct fw_request *r, | |
465 | int tcode, int destination, int source, | |
466 | int generation, int speed, | |
467 | unsigned long long offset, | |
468 | void *payload, size_t length, void *callback_data) | |
469 | { | |
470 | struct address_handler *handler = callback_data; | |
471 | struct request *request; | |
472 | struct request_event *e; | |
19a15b93 KH |
473 | struct client *client = handler->client; |
474 | ||
2d826cc5 KH |
475 | request = kmalloc(sizeof(*request), GFP_ATOMIC); |
476 | e = kmalloc(sizeof(*e), GFP_ATOMIC); | |
19a15b93 KH |
477 | if (request == NULL || e == NULL) { |
478 | kfree(request); | |
479 | kfree(e); | |
480 | fw_send_response(card, r, RCODE_CONFLICT_ERROR); | |
481 | return; | |
482 | } | |
483 | ||
484 | request->request = r; | |
485 | request->data = payload; | |
486 | request->length = length; | |
487 | ||
3964a449 KH |
488 | request->resource.release = release_request; |
489 | add_client_resource(client, &request->resource); | |
19a15b93 KH |
490 | |
491 | e->request.type = FW_CDEV_EVENT_REQUEST; | |
492 | e->request.tcode = tcode; | |
493 | e->request.offset = offset; | |
494 | e->request.length = length; | |
3964a449 | 495 | e->request.handle = request->resource.handle; |
19a15b93 KH |
496 | e->request.closure = handler->closure; |
497 | ||
498 | queue_event(client, &e->event, | |
2d826cc5 | 499 | &e->request, sizeof(e->request), payload, length); |
19a15b93 KH |
500 | } |
501 | ||
3964a449 KH |
502 | static void |
503 | release_address_handler(struct client *client, | |
504 | struct client_resource *resource) | |
505 | { | |
506 | struct address_handler *handler = | |
507 | container_of(resource, struct address_handler, resource); | |
508 | ||
509 | fw_core_remove_address_handler(&handler->handler); | |
510 | kfree(handler); | |
511 | } | |
512 | ||
4f259223 | 513 | static int ioctl_allocate(struct client *client, void *buffer) |
19a15b93 | 514 | { |
4f259223 | 515 | struct fw_cdev_allocate *request = buffer; |
19a15b93 | 516 | struct address_handler *handler; |
19a15b93 KH |
517 | struct fw_address_region region; |
518 | ||
2d826cc5 | 519 | handler = kmalloc(sizeof(*handler), GFP_KERNEL); |
19a15b93 KH |
520 | if (handler == NULL) |
521 | return -ENOMEM; | |
522 | ||
4f259223 KH |
523 | region.start = request->offset; |
524 | region.end = request->offset + request->length; | |
525 | handler->handler.length = request->length; | |
19a15b93 KH |
526 | handler->handler.address_callback = handle_request; |
527 | handler->handler.callback_data = handler; | |
4f259223 | 528 | handler->closure = request->closure; |
19a15b93 KH |
529 | handler->client = client; |
530 | ||
531 | if (fw_core_add_address_handler(&handler->handler, ®ion) < 0) { | |
532 | kfree(handler); | |
533 | return -EBUSY; | |
534 | } | |
535 | ||
3964a449 KH |
536 | handler->resource.release = release_address_handler; |
537 | add_client_resource(client, &handler->resource); | |
4f259223 | 538 | request->handle = handler->resource.handle; |
19a15b93 KH |
539 | |
540 | return 0; | |
541 | } | |
542 | ||
4f259223 | 543 | static int ioctl_deallocate(struct client *client, void *buffer) |
9472316b | 544 | { |
4f259223 | 545 | struct fw_cdev_deallocate *request = buffer; |
9472316b | 546 | |
4f259223 | 547 | return release_client_resource(client, request->handle, NULL); |
9472316b KH |
548 | } |
549 | ||
4f259223 | 550 | static int ioctl_send_response(struct client *client, void *buffer) |
19a15b93 | 551 | { |
4f259223 | 552 | struct fw_cdev_send_response *request = buffer; |
3964a449 | 553 | struct client_resource *resource; |
19a15b93 | 554 | struct request *r; |
19a15b93 | 555 | |
4f259223 | 556 | if (release_client_resource(client, request->handle, &resource) < 0) |
19a15b93 | 557 | return -EINVAL; |
3964a449 | 558 | r = container_of(resource, struct request, resource); |
4f259223 KH |
559 | if (request->length < r->length) |
560 | r->length = request->length; | |
561 | if (copy_from_user(r->data, u64_to_uptr(request->data), r->length)) | |
19a15b93 KH |
562 | return -EFAULT; |
563 | ||
4f259223 | 564 | fw_send_response(client->device->card, r->request, request->rcode); |
19a15b93 KH |
565 | kfree(r); |
566 | ||
567 | return 0; | |
568 | } | |
569 | ||
4f259223 | 570 | static int ioctl_initiate_bus_reset(struct client *client, void *buffer) |
5371842b | 571 | { |
4f259223 | 572 | struct fw_cdev_initiate_bus_reset *request = buffer; |
5371842b KH |
573 | int short_reset; |
574 | ||
4f259223 | 575 | short_reset = (request->type == FW_CDEV_SHORT_RESET); |
5371842b KH |
576 | |
577 | return fw_core_initiate_bus_reset(client->device->card, short_reset); | |
578 | } | |
579 | ||
66dea3e5 KH |
580 | struct descriptor { |
581 | struct fw_descriptor d; | |
3964a449 | 582 | struct client_resource resource; |
66dea3e5 KH |
583 | u32 data[0]; |
584 | }; | |
585 | ||
3964a449 KH |
586 | static void release_descriptor(struct client *client, |
587 | struct client_resource *resource) | |
588 | { | |
589 | struct descriptor *descriptor = | |
590 | container_of(resource, struct descriptor, resource); | |
591 | ||
592 | fw_core_remove_descriptor(&descriptor->d); | |
593 | kfree(descriptor); | |
594 | } | |
595 | ||
4f259223 | 596 | static int ioctl_add_descriptor(struct client *client, void *buffer) |
66dea3e5 | 597 | { |
4f259223 | 598 | struct fw_cdev_add_descriptor *request = buffer; |
66dea3e5 | 599 | struct descriptor *descriptor; |
66dea3e5 KH |
600 | int retval; |
601 | ||
4f259223 | 602 | if (request->length > 256) |
66dea3e5 KH |
603 | return -EINVAL; |
604 | ||
605 | descriptor = | |
2d826cc5 | 606 | kmalloc(sizeof(*descriptor) + request->length * 4, GFP_KERNEL); |
66dea3e5 KH |
607 | if (descriptor == NULL) |
608 | return -ENOMEM; | |
609 | ||
610 | if (copy_from_user(descriptor->data, | |
4f259223 | 611 | u64_to_uptr(request->data), request->length * 4)) { |
66dea3e5 KH |
612 | kfree(descriptor); |
613 | return -EFAULT; | |
614 | } | |
615 | ||
4f259223 KH |
616 | descriptor->d.length = request->length; |
617 | descriptor->d.immediate = request->immediate; | |
618 | descriptor->d.key = request->key; | |
66dea3e5 KH |
619 | descriptor->d.data = descriptor->data; |
620 | ||
621 | retval = fw_core_add_descriptor(&descriptor->d); | |
622 | if (retval < 0) { | |
623 | kfree(descriptor); | |
624 | return retval; | |
625 | } | |
626 | ||
3964a449 KH |
627 | descriptor->resource.release = release_descriptor; |
628 | add_client_resource(client, &descriptor->resource); | |
4f259223 | 629 | request->handle = descriptor->resource.handle; |
66dea3e5 KH |
630 | |
631 | return 0; | |
632 | } | |
633 | ||
4f259223 | 634 | static int ioctl_remove_descriptor(struct client *client, void *buffer) |
66dea3e5 | 635 | { |
4f259223 | 636 | struct fw_cdev_remove_descriptor *request = buffer; |
66dea3e5 | 637 | |
4f259223 | 638 | return release_client_resource(client, request->handle, NULL); |
66dea3e5 KH |
639 | } |
640 | ||
19a15b93 | 641 | static void |
9b32d5f3 KH |
642 | iso_callback(struct fw_iso_context *context, u32 cycle, |
643 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
644 | { |
645 | struct client *client = data; | |
930e4b7f | 646 | struct iso_interrupt *irq; |
19a15b93 | 647 | |
930e4b7f SR |
648 | irq = kzalloc(sizeof(*irq) + header_length, GFP_ATOMIC); |
649 | if (irq == NULL) | |
19a15b93 KH |
650 | return; |
651 | ||
930e4b7f SR |
652 | irq->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
653 | irq->interrupt.closure = client->iso_closure; | |
654 | irq->interrupt.cycle = cycle; | |
655 | irq->interrupt.header_length = header_length; | |
656 | memcpy(irq->interrupt.header, header, header_length); | |
657 | queue_event(client, &irq->event, &irq->interrupt, | |
658 | sizeof(irq->interrupt) + header_length, NULL, 0); | |
19a15b93 KH |
659 | } |
660 | ||
4f259223 | 661 | static int ioctl_create_iso_context(struct client *client, void *buffer) |
19a15b93 | 662 | { |
4f259223 | 663 | struct fw_cdev_create_iso_context *request = buffer; |
24315c5e | 664 | struct fw_iso_context *context; |
19a15b93 | 665 | |
fae60312 SR |
666 | /* We only support one context at this time. */ |
667 | if (client->iso_context != NULL) | |
668 | return -EBUSY; | |
669 | ||
4f259223 | 670 | if (request->channel > 63) |
21efb3cf KH |
671 | return -EINVAL; |
672 | ||
4f259223 | 673 | switch (request->type) { |
c70dc788 | 674 | case FW_ISO_CONTEXT_RECEIVE: |
4f259223 | 675 | if (request->header_size < 4 || (request->header_size & 3)) |
c70dc788 | 676 | return -EINVAL; |
98b6cbe8 | 677 | |
c70dc788 KH |
678 | break; |
679 | ||
680 | case FW_ISO_CONTEXT_TRANSMIT: | |
4f259223 | 681 | if (request->speed > SCODE_3200) |
c70dc788 KH |
682 | return -EINVAL; |
683 | ||
684 | break; | |
685 | ||
686 | default: | |
21efb3cf | 687 | return -EINVAL; |
c70dc788 KH |
688 | } |
689 | ||
24315c5e KH |
690 | context = fw_iso_context_create(client->device->card, |
691 | request->type, | |
692 | request->channel, | |
693 | request->speed, | |
694 | request->header_size, | |
695 | iso_callback, client); | |
696 | if (IS_ERR(context)) | |
697 | return PTR_ERR(context); | |
698 | ||
abaa5743 | 699 | client->iso_closure = request->closure; |
24315c5e | 700 | client->iso_context = context; |
19a15b93 | 701 | |
abaa5743 KH |
702 | /* We only support one context at this time. */ |
703 | request->handle = 0; | |
704 | ||
19a15b93 KH |
705 | return 0; |
706 | } | |
707 | ||
1ca31ae7 KH |
708 | /* Macros for decoding the iso packet control header. */ |
709 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) | |
710 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) | |
711 | #define GET_SKIP(v) (((v) >> 17) & 0x01) | |
712 | #define GET_TAG(v) (((v) >> 18) & 0x02) | |
713 | #define GET_SY(v) (((v) >> 20) & 0x04) | |
714 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) | |
715 | ||
4f259223 | 716 | static int ioctl_queue_iso(struct client *client, void *buffer) |
19a15b93 | 717 | { |
4f259223 | 718 | struct fw_cdev_queue_iso *request = buffer; |
19a15b93 | 719 | struct fw_cdev_iso_packet __user *p, *end, *next; |
9b32d5f3 | 720 | struct fw_iso_context *ctx = client->iso_context; |
ef370ee7 | 721 | unsigned long payload, buffer_end, header_length; |
1ca31ae7 | 722 | u32 control; |
19a15b93 KH |
723 | int count; |
724 | struct { | |
725 | struct fw_iso_packet packet; | |
726 | u8 header[256]; | |
727 | } u; | |
728 | ||
abaa5743 | 729 | if (ctx == NULL || request->handle != 0) |
19a15b93 | 730 | return -EINVAL; |
19a15b93 | 731 | |
c781c06d KH |
732 | /* |
733 | * If the user passes a non-NULL data pointer, has mmap()'ed | |
19a15b93 KH |
734 | * the iso buffer, and the pointer points inside the buffer, |
735 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 736 | * set them both to 0, which will still let packets with |
19a15b93 KH |
737 | * payload_length == 0 through. In other words, if no packets |
738 | * use the indirect payload, the iso buffer need not be mapped | |
c781c06d KH |
739 | * and the request->data pointer is ignored. |
740 | */ | |
19a15b93 | 741 | |
4f259223 | 742 | payload = (unsigned long)request->data - client->vm_start; |
ef370ee7 | 743 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
4f259223 | 744 | if (request->data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 745 | payload >= buffer_end) { |
9aad8125 | 746 | payload = 0; |
ef370ee7 | 747 | buffer_end = 0; |
19a15b93 KH |
748 | } |
749 | ||
1ccc9147 AV |
750 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(request->packets); |
751 | ||
752 | if (!access_ok(VERIFY_READ, p, request->size)) | |
19a15b93 KH |
753 | return -EFAULT; |
754 | ||
4f259223 | 755 | end = (void __user *)p + request->size; |
19a15b93 KH |
756 | count = 0; |
757 | while (p < end) { | |
1ca31ae7 | 758 | if (get_user(control, &p->control)) |
19a15b93 | 759 | return -EFAULT; |
1ca31ae7 KH |
760 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
761 | u.packet.interrupt = GET_INTERRUPT(control); | |
762 | u.packet.skip = GET_SKIP(control); | |
763 | u.packet.tag = GET_TAG(control); | |
764 | u.packet.sy = GET_SY(control); | |
765 | u.packet.header_length = GET_HEADER_LENGTH(control); | |
295e3feb | 766 | |
9b32d5f3 | 767 | if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) { |
295e3feb KH |
768 | header_length = u.packet.header_length; |
769 | } else { | |
c781c06d KH |
770 | /* |
771 | * We require that header_length is a multiple of | |
772 | * the fixed header size, ctx->header_size. | |
773 | */ | |
9b32d5f3 KH |
774 | if (ctx->header_size == 0) { |
775 | if (u.packet.header_length > 0) | |
776 | return -EINVAL; | |
777 | } else if (u.packet.header_length % ctx->header_size != 0) { | |
295e3feb | 778 | return -EINVAL; |
9b32d5f3 | 779 | } |
295e3feb KH |
780 | header_length = 0; |
781 | } | |
782 | ||
19a15b93 | 783 | next = (struct fw_cdev_iso_packet __user *) |
295e3feb | 784 | &p->header[header_length / 4]; |
19a15b93 KH |
785 | if (next > end) |
786 | return -EINVAL; | |
787 | if (__copy_from_user | |
295e3feb | 788 | (u.packet.header, p->header, header_length)) |
19a15b93 | 789 | return -EFAULT; |
98b6cbe8 | 790 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
791 | u.packet.header_length + u.packet.payload_length > 0) |
792 | return -EINVAL; | |
ef370ee7 | 793 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
794 | return -EINVAL; |
795 | ||
9b32d5f3 KH |
796 | if (fw_iso_context_queue(ctx, &u.packet, |
797 | &client->buffer, payload)) | |
19a15b93 KH |
798 | break; |
799 | ||
800 | p = next; | |
801 | payload += u.packet.payload_length; | |
802 | count++; | |
803 | } | |
804 | ||
4f259223 KH |
805 | request->size -= uptr_to_u64(p) - request->packets; |
806 | request->packets = uptr_to_u64(p); | |
807 | request->data = client->vm_start + payload; | |
19a15b93 KH |
808 | |
809 | return count; | |
810 | } | |
811 | ||
4f259223 | 812 | static int ioctl_start_iso(struct client *client, void *buffer) |
19a15b93 | 813 | { |
4f259223 | 814 | struct fw_cdev_start_iso *request = buffer; |
19a15b93 | 815 | |
fae60312 | 816 | if (client->iso_context == NULL || request->handle != 0) |
abaa5743 | 817 | return -EINVAL; |
fae60312 | 818 | |
eb0306ea | 819 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE) { |
4f259223 | 820 | if (request->tags == 0 || request->tags > 15) |
eb0306ea KH |
821 | return -EINVAL; |
822 | ||
4f259223 | 823 | if (request->sync > 15) |
eb0306ea KH |
824 | return -EINVAL; |
825 | } | |
826 | ||
4f259223 KH |
827 | return fw_iso_context_start(client->iso_context, request->cycle, |
828 | request->sync, request->tags); | |
19a15b93 KH |
829 | } |
830 | ||
4f259223 | 831 | static int ioctl_stop_iso(struct client *client, void *buffer) |
b8295668 | 832 | { |
abaa5743 KH |
833 | struct fw_cdev_stop_iso *request = buffer; |
834 | ||
fae60312 | 835 | if (client->iso_context == NULL || request->handle != 0) |
abaa5743 KH |
836 | return -EINVAL; |
837 | ||
b8295668 KH |
838 | return fw_iso_context_stop(client->iso_context); |
839 | } | |
840 | ||
a64408b9 SR |
841 | static int ioctl_get_cycle_timer(struct client *client, void *buffer) |
842 | { | |
843 | struct fw_cdev_get_cycle_timer *request = buffer; | |
844 | struct fw_card *card = client->device->card; | |
845 | unsigned long long bus_time; | |
846 | struct timeval tv; | |
847 | unsigned long flags; | |
848 | ||
849 | preempt_disable(); | |
850 | local_irq_save(flags); | |
851 | ||
852 | bus_time = card->driver->get_bus_time(card); | |
853 | do_gettimeofday(&tv); | |
854 | ||
855 | local_irq_restore(flags); | |
856 | preempt_enable(); | |
857 | ||
858 | request->local_time = tv.tv_sec * 1000000ULL + tv.tv_usec; | |
859 | request->cycle_timer = bus_time & 0xffffffff; | |
860 | return 0; | |
861 | } | |
862 | ||
4f259223 KH |
863 | static int (* const ioctl_handlers[])(struct client *client, void *buffer) = { |
864 | ioctl_get_info, | |
865 | ioctl_send_request, | |
866 | ioctl_allocate, | |
867 | ioctl_deallocate, | |
868 | ioctl_send_response, | |
869 | ioctl_initiate_bus_reset, | |
870 | ioctl_add_descriptor, | |
871 | ioctl_remove_descriptor, | |
872 | ioctl_create_iso_context, | |
873 | ioctl_queue_iso, | |
874 | ioctl_start_iso, | |
875 | ioctl_stop_iso, | |
a64408b9 | 876 | ioctl_get_cycle_timer, |
4f259223 KH |
877 | }; |
878 | ||
19a15b93 KH |
879 | static int |
880 | dispatch_ioctl(struct client *client, unsigned int cmd, void __user *arg) | |
881 | { | |
4f259223 KH |
882 | char buffer[256]; |
883 | int retval; | |
884 | ||
885 | if (_IOC_TYPE(cmd) != '#' || | |
886 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers)) | |
19a15b93 | 887 | return -EINVAL; |
4f259223 KH |
888 | |
889 | if (_IOC_DIR(cmd) & _IOC_WRITE) { | |
2d826cc5 | 890 | if (_IOC_SIZE(cmd) > sizeof(buffer) || |
4f259223 KH |
891 | copy_from_user(buffer, arg, _IOC_SIZE(cmd))) |
892 | return -EFAULT; | |
893 | } | |
894 | ||
895 | retval = ioctl_handlers[_IOC_NR(cmd)](client, buffer); | |
896 | if (retval < 0) | |
897 | return retval; | |
898 | ||
899 | if (_IOC_DIR(cmd) & _IOC_READ) { | |
2d826cc5 | 900 | if (_IOC_SIZE(cmd) > sizeof(buffer) || |
4f259223 KH |
901 | copy_to_user(arg, buffer, _IOC_SIZE(cmd))) |
902 | return -EFAULT; | |
19a15b93 | 903 | } |
4f259223 KH |
904 | |
905 | return 0; | |
19a15b93 KH |
906 | } |
907 | ||
908 | static long | |
909 | fw_device_op_ioctl(struct file *file, | |
910 | unsigned int cmd, unsigned long arg) | |
911 | { | |
912 | struct client *client = file->private_data; | |
913 | ||
551f4cb9 JF |
914 | if (fw_device_is_shutdown(client->device)) |
915 | return -ENODEV; | |
916 | ||
19a15b93 KH |
917 | return dispatch_ioctl(client, cmd, (void __user *) arg); |
918 | } | |
919 | ||
920 | #ifdef CONFIG_COMPAT | |
921 | static long | |
922 | fw_device_op_compat_ioctl(struct file *file, | |
923 | unsigned int cmd, unsigned long arg) | |
924 | { | |
925 | struct client *client = file->private_data; | |
926 | ||
551f4cb9 JF |
927 | if (fw_device_is_shutdown(client->device)) |
928 | return -ENODEV; | |
929 | ||
19a15b93 KH |
930 | return dispatch_ioctl(client, cmd, compat_ptr(arg)); |
931 | } | |
932 | #endif | |
933 | ||
934 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
935 | { | |
936 | struct client *client = file->private_data; | |
9aad8125 KH |
937 | enum dma_data_direction direction; |
938 | unsigned long size; | |
939 | int page_count, retval; | |
940 | ||
551f4cb9 JF |
941 | if (fw_device_is_shutdown(client->device)) |
942 | return -ENODEV; | |
943 | ||
9aad8125 KH |
944 | /* FIXME: We could support multiple buffers, but we don't. */ |
945 | if (client->buffer.pages != NULL) | |
946 | return -EBUSY; | |
947 | ||
948 | if (!(vma->vm_flags & VM_SHARED)) | |
949 | return -EINVAL; | |
19a15b93 | 950 | |
9aad8125 | 951 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
952 | return -EINVAL; |
953 | ||
954 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
955 | size = vma->vm_end - vma->vm_start; |
956 | page_count = size >> PAGE_SHIFT; | |
957 | if (size & ~PAGE_MASK) | |
958 | return -EINVAL; | |
959 | ||
960 | if (vma->vm_flags & VM_WRITE) | |
961 | direction = DMA_TO_DEVICE; | |
962 | else | |
963 | direction = DMA_FROM_DEVICE; | |
964 | ||
965 | retval = fw_iso_buffer_init(&client->buffer, client->device->card, | |
966 | page_count, direction); | |
967 | if (retval < 0) | |
968 | return retval; | |
19a15b93 | 969 | |
9aad8125 KH |
970 | retval = fw_iso_buffer_map(&client->buffer, vma); |
971 | if (retval < 0) | |
972 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
973 | ||
974 | return retval; | |
19a15b93 KH |
975 | } |
976 | ||
977 | static int fw_device_op_release(struct inode *inode, struct file *file) | |
978 | { | |
979 | struct client *client = file->private_data; | |
2603bf21 | 980 | struct event *e, *next_e; |
3964a449 | 981 | struct client_resource *r, *next_r; |
97bd9efa | 982 | unsigned long flags; |
19a15b93 | 983 | |
9aad8125 KH |
984 | if (client->buffer.pages) |
985 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
986 | ||
19a15b93 KH |
987 | if (client->iso_context) |
988 | fw_iso_context_destroy(client->iso_context); | |
989 | ||
3964a449 KH |
990 | list_for_each_entry_safe(r, next_r, &client->resource_list, link) |
991 | r->release(client, r); | |
66dea3e5 | 992 | |
c781c06d KH |
993 | /* |
994 | * FIXME: We should wait for the async tasklets to stop | |
995 | * running before freeing the memory. | |
996 | */ | |
28cf6a04 | 997 | |
2603bf21 KH |
998 | list_for_each_entry_safe(e, next_e, &client->event_list, link) |
999 | kfree(e); | |
19a15b93 | 1000 | |
97bd9efa KH |
1001 | spin_lock_irqsave(&client->device->card->lock, flags); |
1002 | list_del(&client->link); | |
1003 | spin_unlock_irqrestore(&client->device->card->lock, flags); | |
1004 | ||
19a15b93 KH |
1005 | fw_device_put(client->device); |
1006 | kfree(client); | |
1007 | ||
1008 | return 0; | |
1009 | } | |
1010 | ||
1011 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
1012 | { | |
1013 | struct client *client = file->private_data; | |
2603bf21 | 1014 | unsigned int mask = 0; |
19a15b93 KH |
1015 | |
1016 | poll_wait(file, &client->wait, pt); | |
1017 | ||
2603bf21 KH |
1018 | if (fw_device_is_shutdown(client->device)) |
1019 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 1020 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
1021 | mask |= POLLIN | POLLRDNORM; |
1022 | ||
1023 | return mask; | |
19a15b93 KH |
1024 | } |
1025 | ||
21ebcd12 | 1026 | const struct file_operations fw_device_ops = { |
19a15b93 KH |
1027 | .owner = THIS_MODULE, |
1028 | .open = fw_device_op_open, | |
1029 | .read = fw_device_op_read, | |
1030 | .unlocked_ioctl = fw_device_op_ioctl, | |
1031 | .poll = fw_device_op_poll, | |
1032 | .release = fw_device_op_release, | |
1033 | .mmap = fw_device_op_mmap, | |
1034 | ||
1035 | #ifdef CONFIG_COMPAT | |
5af4e5ea | 1036 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
1037 | #endif |
1038 | }; |