]>
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> | |
d67cfb96 | 27 | #include <linux/mutex.h> |
19a15b93 | 28 | #include <linux/poll.h> |
a64408b9 SR |
29 | #include <linux/preempt.h> |
30 | #include <linux/time.h> | |
cf417e54 | 31 | #include <linux/spinlock.h> |
19a15b93 KH |
32 | #include <linux/delay.h> |
33 | #include <linux/mm.h> | |
a3aca3da | 34 | #include <linux/idr.h> |
19a15b93 | 35 | #include <linux/compat.h> |
9640d3d7 | 36 | #include <linux/firewire-cdev.h> |
a64408b9 | 37 | #include <asm/system.h> |
19a15b93 KH |
38 | #include <asm/uaccess.h> |
39 | #include "fw-transaction.h" | |
40 | #include "fw-topology.h" | |
41 | #include "fw-device.h" | |
19a15b93 | 42 | |
3964a449 KH |
43 | struct client; |
44 | struct client_resource { | |
45 | struct list_head link; | |
46 | void (*release)(struct client *client, struct client_resource *r); | |
47 | u32 handle; | |
48 | }; | |
49 | ||
c781c06d KH |
50 | /* |
51 | * dequeue_event() just kfree()'s the event, so the event has to be | |
52 | * the first field in the struct. | |
53 | */ | |
54 | ||
19a15b93 KH |
55 | struct event { |
56 | struct { void *data; size_t size; } v[2]; | |
57 | struct list_head link; | |
58 | }; | |
59 | ||
97bd9efa KH |
60 | struct bus_reset { |
61 | struct event event; | |
62 | struct fw_cdev_event_bus_reset reset; | |
63 | }; | |
64 | ||
19a15b93 KH |
65 | struct response { |
66 | struct event event; | |
67 | struct fw_transaction transaction; | |
68 | struct client *client; | |
3964a449 | 69 | struct client_resource resource; |
19a15b93 KH |
70 | struct fw_cdev_event_response response; |
71 | }; | |
72 | ||
73 | struct iso_interrupt { | |
74 | struct event event; | |
75 | struct fw_cdev_event_iso_interrupt interrupt; | |
76 | }; | |
77 | ||
78 | struct client { | |
344bbc4d | 79 | u32 version; |
19a15b93 KH |
80 | struct fw_device *device; |
81 | spinlock_t lock; | |
66dea3e5 | 82 | u32 resource_handle; |
3964a449 | 83 | struct list_head resource_list; |
19a15b93 | 84 | struct list_head event_list; |
19a15b93 | 85 | wait_queue_head_t wait; |
da8ecffa | 86 | u64 bus_reset_closure; |
9aad8125 | 87 | |
19a15b93 | 88 | struct fw_iso_context *iso_context; |
abaa5743 | 89 | u64 iso_closure; |
9aad8125 KH |
90 | struct fw_iso_buffer buffer; |
91 | unsigned long vm_start; | |
97bd9efa KH |
92 | |
93 | struct list_head link; | |
19a15b93 KH |
94 | }; |
95 | ||
96 | static inline void __user * | |
97 | u64_to_uptr(__u64 value) | |
98 | { | |
99 | return (void __user *)(unsigned long)value; | |
100 | } | |
101 | ||
102 | static inline __u64 | |
103 | uptr_to_u64(void __user *ptr) | |
104 | { | |
105 | return (__u64)(unsigned long)ptr; | |
106 | } | |
107 | ||
108 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
109 | { | |
110 | struct fw_device *device; | |
111 | struct client *client; | |
112 | ||
96b19062 | 113 | device = fw_device_get_by_devt(inode->i_rdev); |
a3aca3da KH |
114 | if (device == NULL) |
115 | return -ENODEV; | |
19a15b93 | 116 | |
551f4cb9 JF |
117 | if (fw_device_is_shutdown(device)) { |
118 | fw_device_put(device); | |
119 | return -ENODEV; | |
120 | } | |
121 | ||
2d826cc5 | 122 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
96b19062 SR |
123 | if (client == NULL) { |
124 | fw_device_put(device); | |
19a15b93 | 125 | return -ENOMEM; |
96b19062 | 126 | } |
19a15b93 | 127 | |
96b19062 | 128 | client->device = device; |
19a15b93 | 129 | INIT_LIST_HEAD(&client->event_list); |
3964a449 | 130 | INIT_LIST_HEAD(&client->resource_list); |
19a15b93 KH |
131 | spin_lock_init(&client->lock); |
132 | init_waitqueue_head(&client->wait); | |
133 | ||
134 | file->private_data = client; | |
135 | ||
d67cfb96 | 136 | mutex_lock(&device->client_list_mutex); |
97bd9efa | 137 | list_add_tail(&client->link, &device->client_list); |
d67cfb96 | 138 | mutex_unlock(&device->client_list_mutex); |
97bd9efa | 139 | |
19a15b93 KH |
140 | return 0; |
141 | } | |
142 | ||
143 | static void queue_event(struct client *client, struct event *event, | |
144 | void *data0, size_t size0, void *data1, size_t size1) | |
145 | { | |
146 | unsigned long flags; | |
147 | ||
148 | event->v[0].data = data0; | |
149 | event->v[0].size = size0; | |
150 | event->v[1].data = data1; | |
151 | event->v[1].size = size1; | |
152 | ||
153 | spin_lock_irqsave(&client->lock, flags); | |
19a15b93 | 154 | list_add_tail(&event->link, &client->event_list); |
19a15b93 | 155 | spin_unlock_irqrestore(&client->lock, flags); |
83431cba JF |
156 | |
157 | wake_up_interruptible(&client->wait); | |
19a15b93 KH |
158 | } |
159 | ||
2603bf21 KH |
160 | static int |
161 | dequeue_event(struct client *client, char __user *buffer, size_t count) | |
19a15b93 KH |
162 | { |
163 | unsigned long flags; | |
164 | struct event *event; | |
165 | size_t size, total; | |
2603bf21 | 166 | int i, retval; |
19a15b93 | 167 | |
2603bf21 KH |
168 | retval = wait_event_interruptible(client->wait, |
169 | !list_empty(&client->event_list) || | |
170 | fw_device_is_shutdown(client->device)); | |
171 | if (retval < 0) | |
172 | return retval; | |
19a15b93 | 173 | |
2603bf21 KH |
174 | if (list_empty(&client->event_list) && |
175 | fw_device_is_shutdown(client->device)) | |
176 | return -ENODEV; | |
19a15b93 | 177 | |
2603bf21 | 178 | spin_lock_irqsave(&client->lock, flags); |
19a15b93 KH |
179 | event = container_of(client->event_list.next, struct event, link); |
180 | list_del(&event->link); | |
19a15b93 KH |
181 | spin_unlock_irqrestore(&client->lock, flags); |
182 | ||
19a15b93 KH |
183 | total = 0; |
184 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
185 | size = min(event->v[i].size, count - total); | |
2603bf21 KH |
186 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
187 | retval = -EFAULT; | |
19a15b93 | 188 | goto out; |
2603bf21 | 189 | } |
19a15b93 KH |
190 | total += size; |
191 | } | |
192 | retval = total; | |
193 | ||
194 | out: | |
195 | kfree(event); | |
196 | ||
197 | return retval; | |
198 | } | |
199 | ||
200 | static ssize_t | |
201 | fw_device_op_read(struct file *file, | |
202 | char __user *buffer, size_t count, loff_t *offset) | |
203 | { | |
204 | struct client *client = file->private_data; | |
205 | ||
206 | return dequeue_event(client, buffer, count); | |
207 | } | |
208 | ||
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; |
cf417e54 JF |
214 | unsigned long flags; |
215 | ||
216 | spin_lock_irqsave(&card->lock, flags); | |
344bbc4d | 217 | |
da8ecffa | 218 | event->closure = client->bus_reset_closure; |
344bbc4d | 219 | event->type = FW_CDEV_EVENT_BUS_RESET; |
cf5a56ac | 220 | event->generation = client->device->generation; |
da8ecffa | 221 | event->node_id = client->device->node_id; |
344bbc4d KH |
222 | event->local_node_id = card->local_node->node_id; |
223 | event->bm_node_id = 0; /* FIXME: We don't track the BM. */ | |
224 | event->irm_node_id = card->irm_node->node_id; | |
225 | event->root_node_id = card->root_node->node_id; | |
cf417e54 JF |
226 | |
227 | spin_unlock_irqrestore(&card->lock, flags); | |
344bbc4d KH |
228 | } |
229 | ||
2603bf21 KH |
230 | static void |
231 | for_each_client(struct fw_device *device, | |
232 | void (*callback)(struct client *client)) | |
233 | { | |
2603bf21 | 234 | struct client *c; |
2603bf21 | 235 | |
d67cfb96 | 236 | mutex_lock(&device->client_list_mutex); |
2603bf21 KH |
237 | list_for_each_entry(c, &device->client_list, link) |
238 | callback(c); | |
d67cfb96 | 239 | mutex_unlock(&device->client_list_mutex); |
2603bf21 KH |
240 | } |
241 | ||
97bd9efa KH |
242 | static void |
243 | queue_bus_reset_event(struct client *client) | |
244 | { | |
245 | struct bus_reset *bus_reset; | |
97bd9efa | 246 | |
d67cfb96 | 247 | bus_reset = kzalloc(sizeof(*bus_reset), GFP_KERNEL); |
97bd9efa KH |
248 | if (bus_reset == NULL) { |
249 | fw_notify("Out of memory when allocating bus reset event\n"); | |
250 | return; | |
251 | } | |
252 | ||
da8ecffa | 253 | fill_bus_reset_event(&bus_reset->reset, client); |
97bd9efa KH |
254 | |
255 | queue_event(client, &bus_reset->event, | |
2d826cc5 | 256 | &bus_reset->reset, sizeof(bus_reset->reset), NULL, 0); |
97bd9efa KH |
257 | } |
258 | ||
259 | void fw_device_cdev_update(struct fw_device *device) | |
260 | { | |
2603bf21 KH |
261 | for_each_client(device, queue_bus_reset_event); |
262 | } | |
97bd9efa | 263 | |
2603bf21 KH |
264 | static void wake_up_client(struct client *client) |
265 | { | |
266 | wake_up_interruptible(&client->wait); | |
267 | } | |
97bd9efa | 268 | |
2603bf21 KH |
269 | void fw_device_cdev_remove(struct fw_device *device) |
270 | { | |
271 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
272 | } |
273 | ||
4f259223 | 274 | static int ioctl_get_info(struct client *client, void *buffer) |
19a15b93 | 275 | { |
4f259223 | 276 | struct fw_cdev_get_info *get_info = buffer; |
344bbc4d | 277 | struct fw_cdev_event_bus_reset bus_reset; |
c9755e14 | 278 | unsigned long ret = 0; |
344bbc4d | 279 | |
4f259223 KH |
280 | client->version = get_info->version; |
281 | get_info->version = FW_CDEV_VERSION; | |
cf417e54 | 282 | get_info->card = client->device->card->index; |
344bbc4d | 283 | |
c9755e14 SR |
284 | down_read(&fw_device_rwsem); |
285 | ||
4f259223 KH |
286 | if (get_info->rom != 0) { |
287 | void __user *uptr = u64_to_uptr(get_info->rom); | |
288 | size_t want = get_info->rom_length; | |
d84702a5 | 289 | size_t have = client->device->config_rom_length * 4; |
344bbc4d | 290 | |
c9755e14 SR |
291 | ret = copy_to_user(uptr, client->device->config_rom, |
292 | min(want, have)); | |
344bbc4d | 293 | } |
4f259223 | 294 | get_info->rom_length = client->device->config_rom_length * 4; |
344bbc4d | 295 | |
c9755e14 SR |
296 | up_read(&fw_device_rwsem); |
297 | ||
298 | if (ret != 0) | |
299 | return -EFAULT; | |
300 | ||
4f259223 KH |
301 | client->bus_reset_closure = get_info->bus_reset_closure; |
302 | if (get_info->bus_reset != 0) { | |
303 | void __user *uptr = u64_to_uptr(get_info->bus_reset); | |
344bbc4d | 304 | |
da8ecffa | 305 | fill_bus_reset_event(&bus_reset, client); |
2d826cc5 | 306 | if (copy_to_user(uptr, &bus_reset, sizeof(bus_reset))) |
344bbc4d KH |
307 | return -EFAULT; |
308 | } | |
19a15b93 | 309 | |
19a15b93 KH |
310 | return 0; |
311 | } | |
312 | ||
3964a449 KH |
313 | static void |
314 | add_client_resource(struct client *client, struct client_resource *resource) | |
315 | { | |
316 | unsigned long flags; | |
317 | ||
318 | spin_lock_irqsave(&client->lock, flags); | |
319 | list_add_tail(&resource->link, &client->resource_list); | |
320 | resource->handle = client->resource_handle++; | |
321 | spin_unlock_irqrestore(&client->lock, flags); | |
322 | } | |
323 | ||
324 | static int | |
325 | release_client_resource(struct client *client, u32 handle, | |
326 | struct client_resource **resource) | |
327 | { | |
328 | struct client_resource *r; | |
329 | unsigned long flags; | |
330 | ||
331 | spin_lock_irqsave(&client->lock, flags); | |
332 | list_for_each_entry(r, &client->resource_list, link) { | |
333 | if (r->handle == handle) { | |
334 | list_del(&r->link); | |
335 | break; | |
336 | } | |
337 | } | |
338 | spin_unlock_irqrestore(&client->lock, flags); | |
339 | ||
340 | if (&r->link == &client->resource_list) | |
341 | return -EINVAL; | |
342 | ||
343 | if (resource) | |
344 | *resource = r; | |
345 | else | |
346 | r->release(client, r); | |
347 | ||
348 | return 0; | |
349 | } | |
350 | ||
351 | static void | |
352 | release_transaction(struct client *client, struct client_resource *resource) | |
353 | { | |
354 | struct response *response = | |
355 | container_of(resource, struct response, resource); | |
356 | ||
357 | fw_cancel_transaction(client->device->card, &response->transaction); | |
358 | } | |
359 | ||
19a15b93 KH |
360 | static void |
361 | complete_transaction(struct fw_card *card, int rcode, | |
362 | void *payload, size_t length, void *data) | |
363 | { | |
364 | struct response *response = data; | |
365 | struct client *client = response->client; | |
28cf6a04 | 366 | unsigned long flags; |
8401d92b | 367 | struct fw_cdev_event_response *r = &response->response; |
19a15b93 | 368 | |
8401d92b DM |
369 | if (length < r->length) |
370 | r->length = length; | |
19a15b93 | 371 | if (rcode == RCODE_COMPLETE) |
8401d92b | 372 | memcpy(r->data, payload, r->length); |
19a15b93 | 373 | |
28cf6a04 | 374 | spin_lock_irqsave(&client->lock, flags); |
3964a449 | 375 | list_del(&response->resource.link); |
28cf6a04 KH |
376 | spin_unlock_irqrestore(&client->lock, flags); |
377 | ||
8401d92b DM |
378 | r->type = FW_CDEV_EVENT_RESPONSE; |
379 | r->rcode = rcode; | |
380 | ||
381 | /* | |
382 | * In the case that sizeof(*r) doesn't align with the position of the | |
383 | * data, and the read is short, preserve an extra copy of the data | |
384 | * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless | |
385 | * for short reads and some apps depended on it, this is both safe | |
386 | * and prudent for compatibility. | |
387 | */ | |
388 | if (r->length <= sizeof(*r) - offsetof(typeof(*r), data)) | |
389 | queue_event(client, &response->event, r, sizeof(*r), | |
390 | r->data, r->length); | |
391 | else | |
392 | queue_event(client, &response->event, r, sizeof(*r) + r->length, | |
393 | NULL, 0); | |
19a15b93 KH |
394 | } |
395 | ||
350958f9 | 396 | static int ioctl_send_request(struct client *client, void *buffer) |
19a15b93 KH |
397 | { |
398 | struct fw_device *device = client->device; | |
4f259223 | 399 | struct fw_cdev_send_request *request = buffer; |
19a15b93 | 400 | struct response *response; |
1f3125af | 401 | int ret; |
19a15b93 | 402 | |
19a15b93 | 403 | /* What is the biggest size we'll accept, really? */ |
4f259223 | 404 | if (request->length > 4096) |
19a15b93 KH |
405 | return -EINVAL; |
406 | ||
2d826cc5 | 407 | response = kmalloc(sizeof(*response) + request->length, GFP_KERNEL); |
19a15b93 KH |
408 | if (response == NULL) |
409 | return -ENOMEM; | |
410 | ||
411 | response->client = client; | |
4f259223 KH |
412 | response->response.length = request->length; |
413 | response->response.closure = request->closure; | |
19a15b93 | 414 | |
4f259223 | 415 | if (request->data && |
19a15b93 | 416 | copy_from_user(response->response.data, |
4f259223 | 417 | u64_to_uptr(request->data), request->length)) { |
1f3125af SR |
418 | ret = -EFAULT; |
419 | goto err; | |
420 | } | |
421 | ||
422 | switch (request->tcode) { | |
423 | case TCODE_WRITE_QUADLET_REQUEST: | |
424 | case TCODE_WRITE_BLOCK_REQUEST: | |
425 | case TCODE_READ_QUADLET_REQUEST: | |
426 | case TCODE_READ_BLOCK_REQUEST: | |
427 | case TCODE_LOCK_MASK_SWAP: | |
428 | case TCODE_LOCK_COMPARE_SWAP: | |
429 | case TCODE_LOCK_FETCH_ADD: | |
430 | case TCODE_LOCK_LITTLE_ADD: | |
431 | case TCODE_LOCK_BOUNDED_ADD: | |
432 | case TCODE_LOCK_WRAP_ADD: | |
433 | case TCODE_LOCK_VENDOR_DEPENDENT: | |
434 | break; | |
435 | default: | |
436 | ret = -EINVAL; | |
437 | goto err; | |
19a15b93 KH |
438 | } |
439 | ||
3964a449 KH |
440 | response->resource.release = release_transaction; |
441 | add_client_resource(client, &response->resource); | |
28cf6a04 | 442 | |
19a15b93 | 443 | fw_send_request(device->card, &response->transaction, |
4f259223 | 444 | request->tcode & 0x1f, |
907293d7 | 445 | device->node->node_id, |
4f259223 | 446 | request->generation, |
f1397490 | 447 | device->max_speed, |
4f259223 KH |
448 | request->offset, |
449 | response->response.data, request->length, | |
19a15b93 KH |
450 | complete_transaction, response); |
451 | ||
4f259223 | 452 | if (request->data) |
2d826cc5 | 453 | return sizeof(request) + request->length; |
19a15b93 | 454 | else |
2d826cc5 | 455 | return sizeof(request); |
1f3125af SR |
456 | err: |
457 | kfree(response); | |
458 | ||
459 | return ret; | |
19a15b93 KH |
460 | } |
461 | ||
462 | struct address_handler { | |
463 | struct fw_address_handler handler; | |
464 | __u64 closure; | |
465 | struct client *client; | |
3964a449 | 466 | struct client_resource resource; |
19a15b93 KH |
467 | }; |
468 | ||
469 | struct request { | |
470 | struct fw_request *request; | |
471 | void *data; | |
472 | size_t length; | |
3964a449 | 473 | struct client_resource resource; |
19a15b93 KH |
474 | }; |
475 | ||
476 | struct request_event { | |
477 | struct event event; | |
478 | struct fw_cdev_event_request request; | |
479 | }; | |
480 | ||
3964a449 KH |
481 | static void |
482 | release_request(struct client *client, struct client_resource *resource) | |
483 | { | |
484 | struct request *request = | |
485 | container_of(resource, struct request, resource); | |
486 | ||
487 | fw_send_response(client->device->card, request->request, | |
488 | RCODE_CONFLICT_ERROR); | |
489 | kfree(request); | |
490 | } | |
491 | ||
19a15b93 KH |
492 | static void |
493 | handle_request(struct fw_card *card, struct fw_request *r, | |
494 | int tcode, int destination, int source, | |
495 | int generation, int speed, | |
496 | unsigned long long offset, | |
497 | void *payload, size_t length, void *callback_data) | |
498 | { | |
499 | struct address_handler *handler = callback_data; | |
500 | struct request *request; | |
501 | struct request_event *e; | |
19a15b93 KH |
502 | struct client *client = handler->client; |
503 | ||
2d826cc5 KH |
504 | request = kmalloc(sizeof(*request), GFP_ATOMIC); |
505 | e = kmalloc(sizeof(*e), GFP_ATOMIC); | |
19a15b93 KH |
506 | if (request == NULL || e == NULL) { |
507 | kfree(request); | |
508 | kfree(e); | |
509 | fw_send_response(card, r, RCODE_CONFLICT_ERROR); | |
510 | return; | |
511 | } | |
512 | ||
513 | request->request = r; | |
514 | request->data = payload; | |
515 | request->length = length; | |
516 | ||
3964a449 KH |
517 | request->resource.release = release_request; |
518 | add_client_resource(client, &request->resource); | |
19a15b93 KH |
519 | |
520 | e->request.type = FW_CDEV_EVENT_REQUEST; | |
521 | e->request.tcode = tcode; | |
522 | e->request.offset = offset; | |
523 | e->request.length = length; | |
3964a449 | 524 | e->request.handle = request->resource.handle; |
19a15b93 KH |
525 | e->request.closure = handler->closure; |
526 | ||
527 | queue_event(client, &e->event, | |
2d826cc5 | 528 | &e->request, sizeof(e->request), payload, length); |
19a15b93 KH |
529 | } |
530 | ||
3964a449 KH |
531 | static void |
532 | release_address_handler(struct client *client, | |
533 | struct client_resource *resource) | |
534 | { | |
535 | struct address_handler *handler = | |
536 | container_of(resource, struct address_handler, resource); | |
537 | ||
538 | fw_core_remove_address_handler(&handler->handler); | |
539 | kfree(handler); | |
540 | } | |
541 | ||
4f259223 | 542 | static int ioctl_allocate(struct client *client, void *buffer) |
19a15b93 | 543 | { |
4f259223 | 544 | struct fw_cdev_allocate *request = buffer; |
19a15b93 | 545 | struct address_handler *handler; |
19a15b93 KH |
546 | struct fw_address_region region; |
547 | ||
2d826cc5 | 548 | handler = kmalloc(sizeof(*handler), GFP_KERNEL); |
19a15b93 KH |
549 | if (handler == NULL) |
550 | return -ENOMEM; | |
551 | ||
4f259223 KH |
552 | region.start = request->offset; |
553 | region.end = request->offset + request->length; | |
554 | handler->handler.length = request->length; | |
19a15b93 KH |
555 | handler->handler.address_callback = handle_request; |
556 | handler->handler.callback_data = handler; | |
4f259223 | 557 | handler->closure = request->closure; |
19a15b93 KH |
558 | handler->client = client; |
559 | ||
560 | if (fw_core_add_address_handler(&handler->handler, ®ion) < 0) { | |
561 | kfree(handler); | |
562 | return -EBUSY; | |
563 | } | |
564 | ||
3964a449 KH |
565 | handler->resource.release = release_address_handler; |
566 | add_client_resource(client, &handler->resource); | |
4f259223 | 567 | request->handle = handler->resource.handle; |
19a15b93 KH |
568 | |
569 | return 0; | |
570 | } | |
571 | ||
4f259223 | 572 | static int ioctl_deallocate(struct client *client, void *buffer) |
9472316b | 573 | { |
4f259223 | 574 | struct fw_cdev_deallocate *request = buffer; |
9472316b | 575 | |
4f259223 | 576 | return release_client_resource(client, request->handle, NULL); |
9472316b KH |
577 | } |
578 | ||
4f259223 | 579 | static int ioctl_send_response(struct client *client, void *buffer) |
19a15b93 | 580 | { |
4f259223 | 581 | struct fw_cdev_send_response *request = buffer; |
3964a449 | 582 | struct client_resource *resource; |
19a15b93 | 583 | struct request *r; |
19a15b93 | 584 | |
4f259223 | 585 | if (release_client_resource(client, request->handle, &resource) < 0) |
19a15b93 | 586 | return -EINVAL; |
3964a449 | 587 | r = container_of(resource, struct request, resource); |
4f259223 KH |
588 | if (request->length < r->length) |
589 | r->length = request->length; | |
590 | if (copy_from_user(r->data, u64_to_uptr(request->data), r->length)) | |
19a15b93 KH |
591 | return -EFAULT; |
592 | ||
4f259223 | 593 | fw_send_response(client->device->card, r->request, request->rcode); |
19a15b93 KH |
594 | kfree(r); |
595 | ||
596 | return 0; | |
597 | } | |
598 | ||
4f259223 | 599 | static int ioctl_initiate_bus_reset(struct client *client, void *buffer) |
5371842b | 600 | { |
4f259223 | 601 | struct fw_cdev_initiate_bus_reset *request = buffer; |
5371842b KH |
602 | int short_reset; |
603 | ||
4f259223 | 604 | short_reset = (request->type == FW_CDEV_SHORT_RESET); |
5371842b KH |
605 | |
606 | return fw_core_initiate_bus_reset(client->device->card, short_reset); | |
607 | } | |
608 | ||
66dea3e5 KH |
609 | struct descriptor { |
610 | struct fw_descriptor d; | |
3964a449 | 611 | struct client_resource resource; |
66dea3e5 KH |
612 | u32 data[0]; |
613 | }; | |
614 | ||
3964a449 KH |
615 | static void release_descriptor(struct client *client, |
616 | struct client_resource *resource) | |
617 | { | |
618 | struct descriptor *descriptor = | |
619 | container_of(resource, struct descriptor, resource); | |
620 | ||
621 | fw_core_remove_descriptor(&descriptor->d); | |
622 | kfree(descriptor); | |
623 | } | |
624 | ||
4f259223 | 625 | static int ioctl_add_descriptor(struct client *client, void *buffer) |
66dea3e5 | 626 | { |
4f259223 | 627 | struct fw_cdev_add_descriptor *request = buffer; |
66dea3e5 | 628 | struct descriptor *descriptor; |
66dea3e5 KH |
629 | int retval; |
630 | ||
4f259223 | 631 | if (request->length > 256) |
66dea3e5 KH |
632 | return -EINVAL; |
633 | ||
634 | descriptor = | |
2d826cc5 | 635 | kmalloc(sizeof(*descriptor) + request->length * 4, GFP_KERNEL); |
66dea3e5 KH |
636 | if (descriptor == NULL) |
637 | return -ENOMEM; | |
638 | ||
639 | if (copy_from_user(descriptor->data, | |
4f259223 | 640 | u64_to_uptr(request->data), request->length * 4)) { |
66dea3e5 KH |
641 | kfree(descriptor); |
642 | return -EFAULT; | |
643 | } | |
644 | ||
4f259223 KH |
645 | descriptor->d.length = request->length; |
646 | descriptor->d.immediate = request->immediate; | |
647 | descriptor->d.key = request->key; | |
66dea3e5 KH |
648 | descriptor->d.data = descriptor->data; |
649 | ||
650 | retval = fw_core_add_descriptor(&descriptor->d); | |
651 | if (retval < 0) { | |
652 | kfree(descriptor); | |
653 | return retval; | |
654 | } | |
655 | ||
3964a449 KH |
656 | descriptor->resource.release = release_descriptor; |
657 | add_client_resource(client, &descriptor->resource); | |
4f259223 | 658 | request->handle = descriptor->resource.handle; |
66dea3e5 KH |
659 | |
660 | return 0; | |
661 | } | |
662 | ||
4f259223 | 663 | static int ioctl_remove_descriptor(struct client *client, void *buffer) |
66dea3e5 | 664 | { |
4f259223 | 665 | struct fw_cdev_remove_descriptor *request = buffer; |
66dea3e5 | 666 | |
4f259223 | 667 | return release_client_resource(client, request->handle, NULL); |
66dea3e5 KH |
668 | } |
669 | ||
19a15b93 | 670 | static void |
9b32d5f3 KH |
671 | iso_callback(struct fw_iso_context *context, u32 cycle, |
672 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
673 | { |
674 | struct client *client = data; | |
930e4b7f | 675 | struct iso_interrupt *irq; |
19a15b93 | 676 | |
930e4b7f SR |
677 | irq = kzalloc(sizeof(*irq) + header_length, GFP_ATOMIC); |
678 | if (irq == NULL) | |
19a15b93 KH |
679 | return; |
680 | ||
930e4b7f SR |
681 | irq->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
682 | irq->interrupt.closure = client->iso_closure; | |
683 | irq->interrupt.cycle = cycle; | |
684 | irq->interrupt.header_length = header_length; | |
685 | memcpy(irq->interrupt.header, header, header_length); | |
686 | queue_event(client, &irq->event, &irq->interrupt, | |
687 | sizeof(irq->interrupt) + header_length, NULL, 0); | |
19a15b93 KH |
688 | } |
689 | ||
4f259223 | 690 | static int ioctl_create_iso_context(struct client *client, void *buffer) |
19a15b93 | 691 | { |
4f259223 | 692 | struct fw_cdev_create_iso_context *request = buffer; |
24315c5e | 693 | struct fw_iso_context *context; |
19a15b93 | 694 | |
fae60312 SR |
695 | /* We only support one context at this time. */ |
696 | if (client->iso_context != NULL) | |
697 | return -EBUSY; | |
698 | ||
4f259223 | 699 | if (request->channel > 63) |
21efb3cf KH |
700 | return -EINVAL; |
701 | ||
4f259223 | 702 | switch (request->type) { |
c70dc788 | 703 | case FW_ISO_CONTEXT_RECEIVE: |
4f259223 | 704 | if (request->header_size < 4 || (request->header_size & 3)) |
c70dc788 | 705 | return -EINVAL; |
98b6cbe8 | 706 | |
c70dc788 KH |
707 | break; |
708 | ||
709 | case FW_ISO_CONTEXT_TRANSMIT: | |
4f259223 | 710 | if (request->speed > SCODE_3200) |
c70dc788 KH |
711 | return -EINVAL; |
712 | ||
713 | break; | |
714 | ||
715 | default: | |
21efb3cf | 716 | return -EINVAL; |
c70dc788 KH |
717 | } |
718 | ||
24315c5e KH |
719 | context = fw_iso_context_create(client->device->card, |
720 | request->type, | |
721 | request->channel, | |
722 | request->speed, | |
723 | request->header_size, | |
724 | iso_callback, client); | |
725 | if (IS_ERR(context)) | |
726 | return PTR_ERR(context); | |
727 | ||
abaa5743 | 728 | client->iso_closure = request->closure; |
24315c5e | 729 | client->iso_context = context; |
19a15b93 | 730 | |
abaa5743 KH |
731 | /* We only support one context at this time. */ |
732 | request->handle = 0; | |
733 | ||
19a15b93 KH |
734 | return 0; |
735 | } | |
736 | ||
1ca31ae7 KH |
737 | /* Macros for decoding the iso packet control header. */ |
738 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) | |
739 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) | |
740 | #define GET_SKIP(v) (((v) >> 17) & 0x01) | |
7a100344 SR |
741 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
742 | #define GET_SY(v) (((v) >> 20) & 0x0f) | |
1ca31ae7 KH |
743 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
744 | ||
4f259223 | 745 | static int ioctl_queue_iso(struct client *client, void *buffer) |
19a15b93 | 746 | { |
4f259223 | 747 | struct fw_cdev_queue_iso *request = buffer; |
19a15b93 | 748 | struct fw_cdev_iso_packet __user *p, *end, *next; |
9b32d5f3 | 749 | struct fw_iso_context *ctx = client->iso_context; |
ef370ee7 | 750 | unsigned long payload, buffer_end, header_length; |
1ca31ae7 | 751 | u32 control; |
19a15b93 KH |
752 | int count; |
753 | struct { | |
754 | struct fw_iso_packet packet; | |
755 | u8 header[256]; | |
756 | } u; | |
757 | ||
abaa5743 | 758 | if (ctx == NULL || request->handle != 0) |
19a15b93 | 759 | return -EINVAL; |
19a15b93 | 760 | |
c781c06d KH |
761 | /* |
762 | * If the user passes a non-NULL data pointer, has mmap()'ed | |
19a15b93 KH |
763 | * the iso buffer, and the pointer points inside the buffer, |
764 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 765 | * set them both to 0, which will still let packets with |
19a15b93 KH |
766 | * payload_length == 0 through. In other words, if no packets |
767 | * use the indirect payload, the iso buffer need not be mapped | |
c781c06d KH |
768 | * and the request->data pointer is ignored. |
769 | */ | |
19a15b93 | 770 | |
4f259223 | 771 | payload = (unsigned long)request->data - client->vm_start; |
ef370ee7 | 772 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
4f259223 | 773 | if (request->data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 774 | payload >= buffer_end) { |
9aad8125 | 775 | payload = 0; |
ef370ee7 | 776 | buffer_end = 0; |
19a15b93 KH |
777 | } |
778 | ||
1ccc9147 AV |
779 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(request->packets); |
780 | ||
781 | if (!access_ok(VERIFY_READ, p, request->size)) | |
19a15b93 KH |
782 | return -EFAULT; |
783 | ||
4f259223 | 784 | end = (void __user *)p + request->size; |
19a15b93 KH |
785 | count = 0; |
786 | while (p < end) { | |
1ca31ae7 | 787 | if (get_user(control, &p->control)) |
19a15b93 | 788 | return -EFAULT; |
1ca31ae7 KH |
789 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
790 | u.packet.interrupt = GET_INTERRUPT(control); | |
791 | u.packet.skip = GET_SKIP(control); | |
792 | u.packet.tag = GET_TAG(control); | |
793 | u.packet.sy = GET_SY(control); | |
794 | u.packet.header_length = GET_HEADER_LENGTH(control); | |
295e3feb | 795 | |
9b32d5f3 | 796 | if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) { |
295e3feb KH |
797 | header_length = u.packet.header_length; |
798 | } else { | |
c781c06d KH |
799 | /* |
800 | * We require that header_length is a multiple of | |
801 | * the fixed header size, ctx->header_size. | |
802 | */ | |
9b32d5f3 KH |
803 | if (ctx->header_size == 0) { |
804 | if (u.packet.header_length > 0) | |
805 | return -EINVAL; | |
806 | } else if (u.packet.header_length % ctx->header_size != 0) { | |
295e3feb | 807 | return -EINVAL; |
9b32d5f3 | 808 | } |
295e3feb KH |
809 | header_length = 0; |
810 | } | |
811 | ||
19a15b93 | 812 | next = (struct fw_cdev_iso_packet __user *) |
295e3feb | 813 | &p->header[header_length / 4]; |
19a15b93 KH |
814 | if (next > end) |
815 | return -EINVAL; | |
816 | if (__copy_from_user | |
295e3feb | 817 | (u.packet.header, p->header, header_length)) |
19a15b93 | 818 | return -EFAULT; |
98b6cbe8 | 819 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
820 | u.packet.header_length + u.packet.payload_length > 0) |
821 | return -EINVAL; | |
ef370ee7 | 822 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
823 | return -EINVAL; |
824 | ||
9b32d5f3 KH |
825 | if (fw_iso_context_queue(ctx, &u.packet, |
826 | &client->buffer, payload)) | |
19a15b93 KH |
827 | break; |
828 | ||
829 | p = next; | |
830 | payload += u.packet.payload_length; | |
831 | count++; | |
832 | } | |
833 | ||
4f259223 KH |
834 | request->size -= uptr_to_u64(p) - request->packets; |
835 | request->packets = uptr_to_u64(p); | |
836 | request->data = client->vm_start + payload; | |
19a15b93 KH |
837 | |
838 | return count; | |
839 | } | |
840 | ||
4f259223 | 841 | static int ioctl_start_iso(struct client *client, void *buffer) |
19a15b93 | 842 | { |
4f259223 | 843 | struct fw_cdev_start_iso *request = buffer; |
19a15b93 | 844 | |
fae60312 | 845 | if (client->iso_context == NULL || request->handle != 0) |
abaa5743 | 846 | return -EINVAL; |
fae60312 | 847 | |
eb0306ea | 848 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE) { |
4f259223 | 849 | if (request->tags == 0 || request->tags > 15) |
eb0306ea KH |
850 | return -EINVAL; |
851 | ||
4f259223 | 852 | if (request->sync > 15) |
eb0306ea KH |
853 | return -EINVAL; |
854 | } | |
855 | ||
4f259223 KH |
856 | return fw_iso_context_start(client->iso_context, request->cycle, |
857 | request->sync, request->tags); | |
19a15b93 KH |
858 | } |
859 | ||
4f259223 | 860 | static int ioctl_stop_iso(struct client *client, void *buffer) |
b8295668 | 861 | { |
abaa5743 KH |
862 | struct fw_cdev_stop_iso *request = buffer; |
863 | ||
fae60312 | 864 | if (client->iso_context == NULL || request->handle != 0) |
abaa5743 KH |
865 | return -EINVAL; |
866 | ||
b8295668 KH |
867 | return fw_iso_context_stop(client->iso_context); |
868 | } | |
869 | ||
a64408b9 SR |
870 | static int ioctl_get_cycle_timer(struct client *client, void *buffer) |
871 | { | |
872 | struct fw_cdev_get_cycle_timer *request = buffer; | |
873 | struct fw_card *card = client->device->card; | |
874 | unsigned long long bus_time; | |
875 | struct timeval tv; | |
876 | unsigned long flags; | |
877 | ||
878 | preempt_disable(); | |
879 | local_irq_save(flags); | |
880 | ||
881 | bus_time = card->driver->get_bus_time(card); | |
882 | do_gettimeofday(&tv); | |
883 | ||
884 | local_irq_restore(flags); | |
885 | preempt_enable(); | |
886 | ||
887 | request->local_time = tv.tv_sec * 1000000ULL + tv.tv_usec; | |
888 | request->cycle_timer = bus_time & 0xffffffff; | |
889 | return 0; | |
890 | } | |
891 | ||
4f259223 KH |
892 | static int (* const ioctl_handlers[])(struct client *client, void *buffer) = { |
893 | ioctl_get_info, | |
894 | ioctl_send_request, | |
895 | ioctl_allocate, | |
896 | ioctl_deallocate, | |
897 | ioctl_send_response, | |
898 | ioctl_initiate_bus_reset, | |
899 | ioctl_add_descriptor, | |
900 | ioctl_remove_descriptor, | |
901 | ioctl_create_iso_context, | |
902 | ioctl_queue_iso, | |
903 | ioctl_start_iso, | |
904 | ioctl_stop_iso, | |
a64408b9 | 905 | ioctl_get_cycle_timer, |
4f259223 KH |
906 | }; |
907 | ||
19a15b93 KH |
908 | static int |
909 | dispatch_ioctl(struct client *client, unsigned int cmd, void __user *arg) | |
910 | { | |
4f259223 KH |
911 | char buffer[256]; |
912 | int retval; | |
913 | ||
914 | if (_IOC_TYPE(cmd) != '#' || | |
915 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers)) | |
19a15b93 | 916 | return -EINVAL; |
4f259223 KH |
917 | |
918 | if (_IOC_DIR(cmd) & _IOC_WRITE) { | |
2d826cc5 | 919 | if (_IOC_SIZE(cmd) > sizeof(buffer) || |
4f259223 KH |
920 | copy_from_user(buffer, arg, _IOC_SIZE(cmd))) |
921 | return -EFAULT; | |
922 | } | |
923 | ||
924 | retval = ioctl_handlers[_IOC_NR(cmd)](client, buffer); | |
925 | if (retval < 0) | |
926 | return retval; | |
927 | ||
928 | if (_IOC_DIR(cmd) & _IOC_READ) { | |
2d826cc5 | 929 | if (_IOC_SIZE(cmd) > sizeof(buffer) || |
4f259223 KH |
930 | copy_to_user(arg, buffer, _IOC_SIZE(cmd))) |
931 | return -EFAULT; | |
19a15b93 | 932 | } |
4f259223 | 933 | |
99692f71 | 934 | return retval; |
19a15b93 KH |
935 | } |
936 | ||
937 | static long | |
938 | fw_device_op_ioctl(struct file *file, | |
939 | unsigned int cmd, unsigned long arg) | |
940 | { | |
941 | struct client *client = file->private_data; | |
942 | ||
551f4cb9 JF |
943 | if (fw_device_is_shutdown(client->device)) |
944 | return -ENODEV; | |
945 | ||
19a15b93 KH |
946 | return dispatch_ioctl(client, cmd, (void __user *) arg); |
947 | } | |
948 | ||
949 | #ifdef CONFIG_COMPAT | |
950 | static long | |
951 | fw_device_op_compat_ioctl(struct file *file, | |
952 | unsigned int cmd, unsigned long arg) | |
953 | { | |
954 | struct client *client = file->private_data; | |
955 | ||
551f4cb9 JF |
956 | if (fw_device_is_shutdown(client->device)) |
957 | return -ENODEV; | |
958 | ||
19a15b93 KH |
959 | return dispatch_ioctl(client, cmd, compat_ptr(arg)); |
960 | } | |
961 | #endif | |
962 | ||
963 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
964 | { | |
965 | struct client *client = file->private_data; | |
9aad8125 KH |
966 | enum dma_data_direction direction; |
967 | unsigned long size; | |
968 | int page_count, retval; | |
969 | ||
551f4cb9 JF |
970 | if (fw_device_is_shutdown(client->device)) |
971 | return -ENODEV; | |
972 | ||
9aad8125 KH |
973 | /* FIXME: We could support multiple buffers, but we don't. */ |
974 | if (client->buffer.pages != NULL) | |
975 | return -EBUSY; | |
976 | ||
977 | if (!(vma->vm_flags & VM_SHARED)) | |
978 | return -EINVAL; | |
19a15b93 | 979 | |
9aad8125 | 980 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
981 | return -EINVAL; |
982 | ||
983 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
984 | size = vma->vm_end - vma->vm_start; |
985 | page_count = size >> PAGE_SHIFT; | |
986 | if (size & ~PAGE_MASK) | |
987 | return -EINVAL; | |
988 | ||
989 | if (vma->vm_flags & VM_WRITE) | |
990 | direction = DMA_TO_DEVICE; | |
991 | else | |
992 | direction = DMA_FROM_DEVICE; | |
993 | ||
994 | retval = fw_iso_buffer_init(&client->buffer, client->device->card, | |
995 | page_count, direction); | |
996 | if (retval < 0) | |
997 | return retval; | |
19a15b93 | 998 | |
9aad8125 KH |
999 | retval = fw_iso_buffer_map(&client->buffer, vma); |
1000 | if (retval < 0) | |
1001 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
1002 | ||
1003 | return retval; | |
19a15b93 KH |
1004 | } |
1005 | ||
1006 | static int fw_device_op_release(struct inode *inode, struct file *file) | |
1007 | { | |
1008 | struct client *client = file->private_data; | |
2603bf21 | 1009 | struct event *e, *next_e; |
3964a449 | 1010 | struct client_resource *r, *next_r; |
19a15b93 | 1011 | |
97811e34 SR |
1012 | mutex_lock(&client->device->client_list_mutex); |
1013 | list_del(&client->link); | |
1014 | mutex_unlock(&client->device->client_list_mutex); | |
1015 | ||
9aad8125 KH |
1016 | if (client->buffer.pages) |
1017 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
1018 | ||
19a15b93 KH |
1019 | if (client->iso_context) |
1020 | fw_iso_context_destroy(client->iso_context); | |
1021 | ||
3964a449 KH |
1022 | list_for_each_entry_safe(r, next_r, &client->resource_list, link) |
1023 | r->release(client, r); | |
66dea3e5 | 1024 | |
c781c06d KH |
1025 | /* |
1026 | * FIXME: We should wait for the async tasklets to stop | |
1027 | * running before freeing the memory. | |
1028 | */ | |
28cf6a04 | 1029 | |
2603bf21 KH |
1030 | list_for_each_entry_safe(e, next_e, &client->event_list, link) |
1031 | kfree(e); | |
19a15b93 KH |
1032 | |
1033 | fw_device_put(client->device); | |
1034 | kfree(client); | |
1035 | ||
1036 | return 0; | |
1037 | } | |
1038 | ||
1039 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
1040 | { | |
1041 | struct client *client = file->private_data; | |
2603bf21 | 1042 | unsigned int mask = 0; |
19a15b93 KH |
1043 | |
1044 | poll_wait(file, &client->wait, pt); | |
1045 | ||
2603bf21 KH |
1046 | if (fw_device_is_shutdown(client->device)) |
1047 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 1048 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
1049 | mask |= POLLIN | POLLRDNORM; |
1050 | ||
1051 | return mask; | |
19a15b93 KH |
1052 | } |
1053 | ||
21ebcd12 | 1054 | const struct file_operations fw_device_ops = { |
19a15b93 KH |
1055 | .owner = THIS_MODULE, |
1056 | .open = fw_device_op_open, | |
1057 | .read = fw_device_op_read, | |
1058 | .unlocked_ioctl = fw_device_op_ioctl, | |
1059 | .poll = fw_device_op_poll, | |
1060 | .release = fw_device_op_release, | |
1061 | .mmap = fw_device_op_mmap, | |
1062 | ||
1063 | #ifdef CONFIG_COMPAT | |
5af4e5ea | 1064 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
1065 | #endif |
1066 | }; |