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 | ||
be5bbd67 SR |
21 | #include <linux/compat.h> |
22 | #include <linux/delay.h> | |
23 | #include <linux/device.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/firewire-cdev.h> | |
26 | #include <linux/idr.h> | |
19a15b93 | 27 | #include <linux/kernel.h> |
fb443036 | 28 | #include <linux/kref.h> |
be5bbd67 SR |
29 | #include <linux/mm.h> |
30 | #include <linux/module.h> | |
d67cfb96 | 31 | #include <linux/mutex.h> |
19a15b93 | 32 | #include <linux/poll.h> |
a64408b9 | 33 | #include <linux/preempt.h> |
cf417e54 | 34 | #include <linux/spinlock.h> |
be5bbd67 SR |
35 | #include <linux/time.h> |
36 | #include <linux/vmalloc.h> | |
37 | #include <linux/wait.h> | |
38 | ||
a64408b9 | 39 | #include <asm/system.h> |
19a15b93 | 40 | #include <asm/uaccess.h> |
be5bbd67 | 41 | |
19a15b93 | 42 | #include "fw-device.h" |
be5bbd67 SR |
43 | #include "fw-topology.h" |
44 | #include "fw-transaction.h" | |
19a15b93 | 45 | |
19a15b93 | 46 | struct client { |
344bbc4d | 47 | u32 version; |
19a15b93 | 48 | struct fw_device *device; |
45ee3199 | 49 | |
19a15b93 | 50 | spinlock_t lock; |
45ee3199 JF |
51 | bool in_shutdown; |
52 | struct idr resource_idr; | |
19a15b93 | 53 | struct list_head event_list; |
19a15b93 | 54 | wait_queue_head_t wait; |
da8ecffa | 55 | u64 bus_reset_closure; |
9aad8125 | 56 | |
19a15b93 | 57 | struct fw_iso_context *iso_context; |
abaa5743 | 58 | u64 iso_closure; |
9aad8125 KH |
59 | struct fw_iso_buffer buffer; |
60 | unsigned long vm_start; | |
97bd9efa KH |
61 | |
62 | struct list_head link; | |
fb443036 | 63 | struct kref kref; |
19a15b93 KH |
64 | }; |
65 | ||
fb443036 SR |
66 | static inline void client_get(struct client *client) |
67 | { | |
68 | kref_get(&client->kref); | |
69 | } | |
70 | ||
71 | static void client_release(struct kref *kref) | |
72 | { | |
73 | struct client *client = container_of(kref, struct client, kref); | |
74 | ||
75 | fw_device_put(client->device); | |
76 | kfree(client); | |
77 | } | |
78 | ||
79 | static void client_put(struct client *client) | |
80 | { | |
81 | kref_put(&client->kref, client_release); | |
82 | } | |
83 | ||
97c18b7f SR |
84 | struct client_resource; |
85 | typedef void (*client_resource_release_fn_t)(struct client *, | |
86 | struct client_resource *); | |
87 | struct client_resource { | |
88 | client_resource_release_fn_t release; | |
89 | int handle; | |
90 | }; | |
91 | ||
92 | struct address_handler_resource { | |
93 | struct client_resource resource; | |
94 | struct fw_address_handler handler; | |
95 | __u64 closure; | |
96 | struct client *client; | |
97 | }; | |
98 | ||
99 | struct outbound_transaction_resource { | |
100 | struct client_resource resource; | |
101 | struct fw_transaction transaction; | |
102 | }; | |
103 | ||
104 | struct inbound_transaction_resource { | |
105 | struct client_resource resource; | |
106 | struct fw_request *request; | |
107 | void *data; | |
108 | size_t length; | |
109 | }; | |
110 | ||
111 | struct descriptor_resource { | |
112 | struct client_resource resource; | |
113 | struct fw_descriptor descriptor; | |
114 | u32 data[0]; | |
115 | }; | |
116 | ||
117 | /* | |
118 | * dequeue_event() just kfree()'s the event, so the event has to be | |
119 | * the first field in a struct XYZ_event. | |
120 | */ | |
121 | struct event { | |
122 | struct { void *data; size_t size; } v[2]; | |
123 | struct list_head link; | |
124 | }; | |
125 | ||
126 | struct bus_reset_event { | |
127 | struct event event; | |
128 | struct fw_cdev_event_bus_reset reset; | |
129 | }; | |
130 | ||
131 | struct outbound_transaction_event { | |
132 | struct event event; | |
133 | struct client *client; | |
134 | struct outbound_transaction_resource r; | |
135 | struct fw_cdev_event_response response; | |
136 | }; | |
137 | ||
138 | struct inbound_transaction_event { | |
139 | struct event event; | |
140 | struct fw_cdev_event_request request; | |
141 | }; | |
142 | ||
143 | struct iso_interrupt_event { | |
144 | struct event event; | |
145 | struct fw_cdev_event_iso_interrupt interrupt; | |
146 | }; | |
147 | ||
53dca511 | 148 | static inline void __user *u64_to_uptr(__u64 value) |
19a15b93 KH |
149 | { |
150 | return (void __user *)(unsigned long)value; | |
151 | } | |
152 | ||
53dca511 | 153 | static inline __u64 uptr_to_u64(void __user *ptr) |
19a15b93 KH |
154 | { |
155 | return (__u64)(unsigned long)ptr; | |
156 | } | |
157 | ||
158 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
159 | { | |
160 | struct fw_device *device; | |
161 | struct client *client; | |
162 | ||
96b19062 | 163 | device = fw_device_get_by_devt(inode->i_rdev); |
a3aca3da KH |
164 | if (device == NULL) |
165 | return -ENODEV; | |
19a15b93 | 166 | |
551f4cb9 JF |
167 | if (fw_device_is_shutdown(device)) { |
168 | fw_device_put(device); | |
169 | return -ENODEV; | |
170 | } | |
171 | ||
2d826cc5 | 172 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
96b19062 SR |
173 | if (client == NULL) { |
174 | fw_device_put(device); | |
19a15b93 | 175 | return -ENOMEM; |
96b19062 | 176 | } |
19a15b93 | 177 | |
96b19062 | 178 | client->device = device; |
19a15b93 | 179 | spin_lock_init(&client->lock); |
45ee3199 JF |
180 | idr_init(&client->resource_idr); |
181 | INIT_LIST_HEAD(&client->event_list); | |
19a15b93 | 182 | init_waitqueue_head(&client->wait); |
fb443036 | 183 | kref_init(&client->kref); |
19a15b93 KH |
184 | |
185 | file->private_data = client; | |
186 | ||
d67cfb96 | 187 | mutex_lock(&device->client_list_mutex); |
97bd9efa | 188 | list_add_tail(&client->link, &device->client_list); |
d67cfb96 | 189 | mutex_unlock(&device->client_list_mutex); |
97bd9efa | 190 | |
19a15b93 KH |
191 | return 0; |
192 | } | |
193 | ||
194 | static void queue_event(struct client *client, struct event *event, | |
195 | void *data0, size_t size0, void *data1, size_t size1) | |
196 | { | |
197 | unsigned long flags; | |
198 | ||
199 | event->v[0].data = data0; | |
200 | event->v[0].size = size0; | |
201 | event->v[1].data = data1; | |
202 | event->v[1].size = size1; | |
203 | ||
204 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
205 | if (client->in_shutdown) |
206 | kfree(event); | |
207 | else | |
208 | list_add_tail(&event->link, &client->event_list); | |
19a15b93 | 209 | spin_unlock_irqrestore(&client->lock, flags); |
83431cba JF |
210 | |
211 | wake_up_interruptible(&client->wait); | |
19a15b93 KH |
212 | } |
213 | ||
53dca511 SR |
214 | static int dequeue_event(struct client *client, |
215 | char __user *buffer, size_t count) | |
19a15b93 KH |
216 | { |
217 | unsigned long flags; | |
218 | struct event *event; | |
219 | size_t size, total; | |
2dbd7d7e | 220 | int i, ret; |
19a15b93 | 221 | |
2dbd7d7e SR |
222 | ret = wait_event_interruptible(client->wait, |
223 | !list_empty(&client->event_list) || | |
224 | fw_device_is_shutdown(client->device)); | |
225 | if (ret < 0) | |
226 | return ret; | |
19a15b93 | 227 | |
2603bf21 KH |
228 | if (list_empty(&client->event_list) && |
229 | fw_device_is_shutdown(client->device)) | |
230 | return -ENODEV; | |
19a15b93 | 231 | |
2603bf21 | 232 | spin_lock_irqsave(&client->lock, flags); |
a459b8ab | 233 | event = list_first_entry(&client->event_list, struct event, link); |
19a15b93 | 234 | list_del(&event->link); |
19a15b93 KH |
235 | spin_unlock_irqrestore(&client->lock, flags); |
236 | ||
19a15b93 KH |
237 | total = 0; |
238 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
239 | size = min(event->v[i].size, count - total); | |
2603bf21 | 240 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
2dbd7d7e | 241 | ret = -EFAULT; |
19a15b93 | 242 | goto out; |
2603bf21 | 243 | } |
19a15b93 KH |
244 | total += size; |
245 | } | |
2dbd7d7e | 246 | ret = total; |
19a15b93 KH |
247 | |
248 | out: | |
249 | kfree(event); | |
250 | ||
2dbd7d7e | 251 | return ret; |
19a15b93 KH |
252 | } |
253 | ||
53dca511 SR |
254 | static ssize_t fw_device_op_read(struct file *file, char __user *buffer, |
255 | size_t count, loff_t *offset) | |
19a15b93 KH |
256 | { |
257 | struct client *client = file->private_data; | |
258 | ||
259 | return dequeue_event(client, buffer, count); | |
260 | } | |
261 | ||
53dca511 SR |
262 | static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, |
263 | struct client *client) | |
344bbc4d | 264 | { |
da8ecffa | 265 | struct fw_card *card = client->device->card; |
cf417e54 JF |
266 | unsigned long flags; |
267 | ||
268 | spin_lock_irqsave(&card->lock, flags); | |
344bbc4d | 269 | |
da8ecffa | 270 | event->closure = client->bus_reset_closure; |
344bbc4d | 271 | event->type = FW_CDEV_EVENT_BUS_RESET; |
cf5a56ac | 272 | event->generation = client->device->generation; |
da8ecffa | 273 | event->node_id = client->device->node_id; |
344bbc4d KH |
274 | event->local_node_id = card->local_node->node_id; |
275 | event->bm_node_id = 0; /* FIXME: We don't track the BM. */ | |
276 | event->irm_node_id = card->irm_node->node_id; | |
277 | event->root_node_id = card->root_node->node_id; | |
cf417e54 JF |
278 | |
279 | spin_unlock_irqrestore(&card->lock, flags); | |
344bbc4d KH |
280 | } |
281 | ||
53dca511 SR |
282 | static void for_each_client(struct fw_device *device, |
283 | void (*callback)(struct client *client)) | |
2603bf21 | 284 | { |
2603bf21 | 285 | struct client *c; |
2603bf21 | 286 | |
d67cfb96 | 287 | mutex_lock(&device->client_list_mutex); |
2603bf21 KH |
288 | list_for_each_entry(c, &device->client_list, link) |
289 | callback(c); | |
d67cfb96 | 290 | mutex_unlock(&device->client_list_mutex); |
2603bf21 KH |
291 | } |
292 | ||
53dca511 | 293 | static void queue_bus_reset_event(struct client *client) |
97bd9efa | 294 | { |
97c18b7f | 295 | struct bus_reset_event *e; |
97bd9efa | 296 | |
97c18b7f SR |
297 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
298 | if (e == NULL) { | |
97bd9efa KH |
299 | fw_notify("Out of memory when allocating bus reset event\n"); |
300 | return; | |
301 | } | |
302 | ||
97c18b7f | 303 | fill_bus_reset_event(&e->reset, client); |
97bd9efa | 304 | |
97c18b7f SR |
305 | queue_event(client, &e->event, |
306 | &e->reset, sizeof(e->reset), NULL, 0); | |
97bd9efa KH |
307 | } |
308 | ||
309 | void fw_device_cdev_update(struct fw_device *device) | |
310 | { | |
2603bf21 KH |
311 | for_each_client(device, queue_bus_reset_event); |
312 | } | |
97bd9efa | 313 | |
2603bf21 KH |
314 | static void wake_up_client(struct client *client) |
315 | { | |
316 | wake_up_interruptible(&client->wait); | |
317 | } | |
97bd9efa | 318 | |
2603bf21 KH |
319 | void fw_device_cdev_remove(struct fw_device *device) |
320 | { | |
321 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
322 | } |
323 | ||
4f259223 | 324 | static int ioctl_get_info(struct client *client, void *buffer) |
19a15b93 | 325 | { |
4f259223 | 326 | struct fw_cdev_get_info *get_info = buffer; |
344bbc4d | 327 | struct fw_cdev_event_bus_reset bus_reset; |
c9755e14 | 328 | unsigned long ret = 0; |
344bbc4d | 329 | |
4f259223 KH |
330 | client->version = get_info->version; |
331 | get_info->version = FW_CDEV_VERSION; | |
cf417e54 | 332 | get_info->card = client->device->card->index; |
344bbc4d | 333 | |
c9755e14 SR |
334 | down_read(&fw_device_rwsem); |
335 | ||
4f259223 KH |
336 | if (get_info->rom != 0) { |
337 | void __user *uptr = u64_to_uptr(get_info->rom); | |
338 | size_t want = get_info->rom_length; | |
d84702a5 | 339 | size_t have = client->device->config_rom_length * 4; |
344bbc4d | 340 | |
c9755e14 SR |
341 | ret = copy_to_user(uptr, client->device->config_rom, |
342 | min(want, have)); | |
344bbc4d | 343 | } |
4f259223 | 344 | get_info->rom_length = client->device->config_rom_length * 4; |
344bbc4d | 345 | |
c9755e14 SR |
346 | up_read(&fw_device_rwsem); |
347 | ||
348 | if (ret != 0) | |
349 | return -EFAULT; | |
350 | ||
4f259223 KH |
351 | client->bus_reset_closure = get_info->bus_reset_closure; |
352 | if (get_info->bus_reset != 0) { | |
353 | void __user *uptr = u64_to_uptr(get_info->bus_reset); | |
344bbc4d | 354 | |
da8ecffa | 355 | fill_bus_reset_event(&bus_reset, client); |
2d826cc5 | 356 | if (copy_to_user(uptr, &bus_reset, sizeof(bus_reset))) |
344bbc4d KH |
357 | return -EFAULT; |
358 | } | |
19a15b93 | 359 | |
19a15b93 KH |
360 | return 0; |
361 | } | |
362 | ||
53dca511 SR |
363 | static int add_client_resource(struct client *client, |
364 | struct client_resource *resource, gfp_t gfp_mask) | |
3964a449 KH |
365 | { |
366 | unsigned long flags; | |
45ee3199 JF |
367 | int ret; |
368 | ||
369 | retry: | |
370 | if (idr_pre_get(&client->resource_idr, gfp_mask) == 0) | |
371 | return -ENOMEM; | |
3964a449 KH |
372 | |
373 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
374 | if (client->in_shutdown) |
375 | ret = -ECANCELED; | |
376 | else | |
377 | ret = idr_get_new(&client->resource_idr, resource, | |
378 | &resource->handle); | |
fb443036 SR |
379 | if (ret >= 0) |
380 | client_get(client); | |
3964a449 | 381 | spin_unlock_irqrestore(&client->lock, flags); |
45ee3199 JF |
382 | |
383 | if (ret == -EAGAIN) | |
384 | goto retry; | |
385 | ||
386 | return ret < 0 ? ret : 0; | |
3964a449 KH |
387 | } |
388 | ||
53dca511 SR |
389 | static int release_client_resource(struct client *client, u32 handle, |
390 | client_resource_release_fn_t release, | |
391 | struct client_resource **resource) | |
3964a449 KH |
392 | { |
393 | struct client_resource *r; | |
394 | unsigned long flags; | |
395 | ||
396 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
397 | if (client->in_shutdown) |
398 | r = NULL; | |
399 | else | |
400 | r = idr_find(&client->resource_idr, handle); | |
401 | if (r && r->release == release) | |
402 | idr_remove(&client->resource_idr, handle); | |
3964a449 KH |
403 | spin_unlock_irqrestore(&client->lock, flags); |
404 | ||
45ee3199 | 405 | if (!(r && r->release == release)) |
3964a449 KH |
406 | return -EINVAL; |
407 | ||
408 | if (resource) | |
409 | *resource = r; | |
410 | else | |
411 | r->release(client, r); | |
412 | ||
fb443036 SR |
413 | client_put(client); |
414 | ||
3964a449 KH |
415 | return 0; |
416 | } | |
417 | ||
53dca511 SR |
418 | static void release_transaction(struct client *client, |
419 | struct client_resource *resource) | |
3964a449 | 420 | { |
97c18b7f SR |
421 | struct outbound_transaction_resource *r = container_of(resource, |
422 | struct outbound_transaction_resource, resource); | |
3964a449 | 423 | |
97c18b7f | 424 | fw_cancel_transaction(client->device->card, &r->transaction); |
3964a449 KH |
425 | } |
426 | ||
53dca511 SR |
427 | static void complete_transaction(struct fw_card *card, int rcode, |
428 | void *payload, size_t length, void *data) | |
19a15b93 | 429 | { |
97c18b7f SR |
430 | struct outbound_transaction_event *e = data; |
431 | struct fw_cdev_event_response *rsp = &e->response; | |
432 | struct client *client = e->client; | |
28cf6a04 | 433 | unsigned long flags; |
19a15b93 | 434 | |
97c18b7f SR |
435 | if (length < rsp->length) |
436 | rsp->length = length; | |
19a15b93 | 437 | if (rcode == RCODE_COMPLETE) |
97c18b7f | 438 | memcpy(rsp->data, payload, rsp->length); |
19a15b93 | 439 | |
28cf6a04 | 440 | spin_lock_irqsave(&client->lock, flags); |
45ee3199 | 441 | /* |
fb443036 SR |
442 | * 1. If called while in shutdown, the idr tree must be left untouched. |
443 | * The idr handle will be removed and the client reference will be | |
444 | * dropped later. | |
445 | * 2. If the call chain was release_client_resource -> | |
446 | * release_transaction -> complete_transaction (instead of a normal | |
447 | * conclusion of the transaction), i.e. if this resource was already | |
448 | * unregistered from the idr, the client reference will be dropped | |
449 | * by release_client_resource and we must not drop it here. | |
45ee3199 | 450 | */ |
fb443036 | 451 | if (!client->in_shutdown && |
97c18b7f SR |
452 | idr_find(&client->resource_idr, e->r.resource.handle)) { |
453 | idr_remove(&client->resource_idr, e->r.resource.handle); | |
fb443036 SR |
454 | /* Drop the idr's reference */ |
455 | client_put(client); | |
456 | } | |
28cf6a04 KH |
457 | spin_unlock_irqrestore(&client->lock, flags); |
458 | ||
97c18b7f SR |
459 | rsp->type = FW_CDEV_EVENT_RESPONSE; |
460 | rsp->rcode = rcode; | |
8401d92b DM |
461 | |
462 | /* | |
97c18b7f | 463 | * In the case that sizeof(*rsp) doesn't align with the position of the |
8401d92b DM |
464 | * data, and the read is short, preserve an extra copy of the data |
465 | * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless | |
466 | * for short reads and some apps depended on it, this is both safe | |
467 | * and prudent for compatibility. | |
468 | */ | |
97c18b7f SR |
469 | if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data)) |
470 | queue_event(client, &e->event, rsp, sizeof(*rsp), | |
471 | rsp->data, rsp->length); | |
8401d92b | 472 | else |
97c18b7f | 473 | queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length, |
8401d92b | 474 | NULL, 0); |
fb443036 SR |
475 | |
476 | /* Drop the transaction callback's reference */ | |
477 | client_put(client); | |
19a15b93 KH |
478 | } |
479 | ||
350958f9 | 480 | static int ioctl_send_request(struct client *client, void *buffer) |
19a15b93 KH |
481 | { |
482 | struct fw_device *device = client->device; | |
4f259223 | 483 | struct fw_cdev_send_request *request = buffer; |
97c18b7f | 484 | struct outbound_transaction_event *e; |
1f3125af | 485 | int ret; |
19a15b93 | 486 | |
19a15b93 | 487 | /* What is the biggest size we'll accept, really? */ |
4f259223 | 488 | if (request->length > 4096) |
19a15b93 KH |
489 | return -EINVAL; |
490 | ||
97c18b7f SR |
491 | e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL); |
492 | if (e == NULL) | |
19a15b93 KH |
493 | return -ENOMEM; |
494 | ||
97c18b7f SR |
495 | e->client = client; |
496 | e->response.length = request->length; | |
497 | e->response.closure = request->closure; | |
19a15b93 | 498 | |
4f259223 | 499 | if (request->data && |
97c18b7f | 500 | copy_from_user(e->response.data, |
4f259223 | 501 | u64_to_uptr(request->data), request->length)) { |
1f3125af | 502 | ret = -EFAULT; |
45ee3199 | 503 | goto failed; |
1f3125af SR |
504 | } |
505 | ||
506 | switch (request->tcode) { | |
507 | case TCODE_WRITE_QUADLET_REQUEST: | |
508 | case TCODE_WRITE_BLOCK_REQUEST: | |
509 | case TCODE_READ_QUADLET_REQUEST: | |
510 | case TCODE_READ_BLOCK_REQUEST: | |
511 | case TCODE_LOCK_MASK_SWAP: | |
512 | case TCODE_LOCK_COMPARE_SWAP: | |
513 | case TCODE_LOCK_FETCH_ADD: | |
514 | case TCODE_LOCK_LITTLE_ADD: | |
515 | case TCODE_LOCK_BOUNDED_ADD: | |
516 | case TCODE_LOCK_WRAP_ADD: | |
517 | case TCODE_LOCK_VENDOR_DEPENDENT: | |
518 | break; | |
519 | default: | |
520 | ret = -EINVAL; | |
45ee3199 | 521 | goto failed; |
19a15b93 KH |
522 | } |
523 | ||
97c18b7f SR |
524 | e->r.resource.release = release_transaction; |
525 | ret = add_client_resource(client, &e->r.resource, GFP_KERNEL); | |
45ee3199 JF |
526 | if (ret < 0) |
527 | goto failed; | |
28cf6a04 | 528 | |
fb443036 SR |
529 | /* Get a reference for the transaction callback */ |
530 | client_get(client); | |
531 | ||
97c18b7f | 532 | fw_send_request(device->card, &e->r.transaction, |
4f259223 | 533 | request->tcode & 0x1f, |
907293d7 | 534 | device->node->node_id, |
4f259223 | 535 | request->generation, |
f1397490 | 536 | device->max_speed, |
4f259223 | 537 | request->offset, |
97c18b7f SR |
538 | e->response.data, request->length, |
539 | complete_transaction, e); | |
19a15b93 | 540 | |
4f259223 | 541 | if (request->data) |
2d826cc5 | 542 | return sizeof(request) + request->length; |
19a15b93 | 543 | else |
2d826cc5 | 544 | return sizeof(request); |
45ee3199 | 545 | failed: |
97c18b7f | 546 | kfree(e); |
1f3125af SR |
547 | |
548 | return ret; | |
19a15b93 KH |
549 | } |
550 | ||
53dca511 SR |
551 | static void release_request(struct client *client, |
552 | struct client_resource *resource) | |
3964a449 | 553 | { |
97c18b7f SR |
554 | struct inbound_transaction_resource *r = container_of(resource, |
555 | struct inbound_transaction_resource, resource); | |
3964a449 | 556 | |
97c18b7f | 557 | fw_send_response(client->device->card, r->request, |
3964a449 | 558 | RCODE_CONFLICT_ERROR); |
97c18b7f | 559 | kfree(r); |
3964a449 KH |
560 | } |
561 | ||
97c18b7f | 562 | static void handle_request(struct fw_card *card, struct fw_request *request, |
53dca511 SR |
563 | int tcode, int destination, int source, |
564 | int generation, int speed, | |
565 | unsigned long long offset, | |
566 | void *payload, size_t length, void *callback_data) | |
19a15b93 | 567 | { |
97c18b7f SR |
568 | struct address_handler_resource *handler = callback_data; |
569 | struct inbound_transaction_resource *r; | |
570 | struct inbound_transaction_event *e; | |
45ee3199 | 571 | int ret; |
19a15b93 | 572 | |
97c18b7f | 573 | r = kmalloc(sizeof(*r), GFP_ATOMIC); |
2d826cc5 | 574 | e = kmalloc(sizeof(*e), GFP_ATOMIC); |
97c18b7f | 575 | if (r == NULL || e == NULL) |
45ee3199 | 576 | goto failed; |
19a15b93 | 577 | |
97c18b7f SR |
578 | r->request = request; |
579 | r->data = payload; | |
580 | r->length = length; | |
19a15b93 | 581 | |
97c18b7f SR |
582 | r->resource.release = release_request; |
583 | ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC); | |
45ee3199 JF |
584 | if (ret < 0) |
585 | goto failed; | |
19a15b93 KH |
586 | |
587 | e->request.type = FW_CDEV_EVENT_REQUEST; | |
588 | e->request.tcode = tcode; | |
589 | e->request.offset = offset; | |
590 | e->request.length = length; | |
97c18b7f | 591 | e->request.handle = r->resource.handle; |
19a15b93 KH |
592 | e->request.closure = handler->closure; |
593 | ||
97c18b7f | 594 | queue_event(handler->client, &e->event, |
2d826cc5 | 595 | &e->request, sizeof(e->request), payload, length); |
45ee3199 JF |
596 | return; |
597 | ||
598 | failed: | |
97c18b7f | 599 | kfree(r); |
45ee3199 | 600 | kfree(e); |
97c18b7f | 601 | fw_send_response(card, request, RCODE_CONFLICT_ERROR); |
19a15b93 KH |
602 | } |
603 | ||
53dca511 SR |
604 | static void release_address_handler(struct client *client, |
605 | struct client_resource *resource) | |
3964a449 | 606 | { |
97c18b7f SR |
607 | struct address_handler_resource *r = |
608 | container_of(resource, struct address_handler_resource, resource); | |
3964a449 | 609 | |
97c18b7f SR |
610 | fw_core_remove_address_handler(&r->handler); |
611 | kfree(r); | |
3964a449 KH |
612 | } |
613 | ||
4f259223 | 614 | static int ioctl_allocate(struct client *client, void *buffer) |
19a15b93 | 615 | { |
4f259223 | 616 | struct fw_cdev_allocate *request = buffer; |
97c18b7f | 617 | struct address_handler_resource *r; |
19a15b93 | 618 | struct fw_address_region region; |
45ee3199 | 619 | int ret; |
19a15b93 | 620 | |
97c18b7f SR |
621 | r = kmalloc(sizeof(*r), GFP_KERNEL); |
622 | if (r == NULL) | |
19a15b93 KH |
623 | return -ENOMEM; |
624 | ||
4f259223 KH |
625 | region.start = request->offset; |
626 | region.end = request->offset + request->length; | |
97c18b7f SR |
627 | r->handler.length = request->length; |
628 | r->handler.address_callback = handle_request; | |
629 | r->handler.callback_data = r; | |
630 | r->closure = request->closure; | |
631 | r->client = client; | |
19a15b93 | 632 | |
97c18b7f | 633 | ret = fw_core_add_address_handler(&r->handler, ®ion); |
3e0b5f0d | 634 | if (ret < 0) { |
97c18b7f | 635 | kfree(r); |
3e0b5f0d | 636 | return ret; |
19a15b93 KH |
637 | } |
638 | ||
97c18b7f SR |
639 | r->resource.release = release_address_handler; |
640 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 641 | if (ret < 0) { |
97c18b7f | 642 | release_address_handler(client, &r->resource); |
45ee3199 JF |
643 | return ret; |
644 | } | |
97c18b7f | 645 | request->handle = r->resource.handle; |
19a15b93 KH |
646 | |
647 | return 0; | |
648 | } | |
649 | ||
4f259223 | 650 | static int ioctl_deallocate(struct client *client, void *buffer) |
9472316b | 651 | { |
4f259223 | 652 | struct fw_cdev_deallocate *request = buffer; |
9472316b | 653 | |
45ee3199 JF |
654 | return release_client_resource(client, request->handle, |
655 | release_address_handler, NULL); | |
9472316b KH |
656 | } |
657 | ||
4f259223 | 658 | static int ioctl_send_response(struct client *client, void *buffer) |
19a15b93 | 659 | { |
4f259223 | 660 | struct fw_cdev_send_response *request = buffer; |
3964a449 | 661 | struct client_resource *resource; |
97c18b7f | 662 | struct inbound_transaction_resource *r; |
19a15b93 | 663 | |
45ee3199 JF |
664 | if (release_client_resource(client, request->handle, |
665 | release_request, &resource) < 0) | |
19a15b93 | 666 | return -EINVAL; |
45ee3199 | 667 | |
97c18b7f SR |
668 | r = container_of(resource, struct inbound_transaction_resource, |
669 | resource); | |
4f259223 KH |
670 | if (request->length < r->length) |
671 | r->length = request->length; | |
672 | if (copy_from_user(r->data, u64_to_uptr(request->data), r->length)) | |
19a15b93 KH |
673 | return -EFAULT; |
674 | ||
4f259223 | 675 | fw_send_response(client->device->card, r->request, request->rcode); |
19a15b93 KH |
676 | kfree(r); |
677 | ||
678 | return 0; | |
679 | } | |
680 | ||
4f259223 | 681 | static int ioctl_initiate_bus_reset(struct client *client, void *buffer) |
5371842b | 682 | { |
4f259223 | 683 | struct fw_cdev_initiate_bus_reset *request = buffer; |
5371842b KH |
684 | int short_reset; |
685 | ||
4f259223 | 686 | short_reset = (request->type == FW_CDEV_SHORT_RESET); |
5371842b KH |
687 | |
688 | return fw_core_initiate_bus_reset(client->device->card, short_reset); | |
689 | } | |
690 | ||
3964a449 KH |
691 | static void release_descriptor(struct client *client, |
692 | struct client_resource *resource) | |
693 | { | |
97c18b7f SR |
694 | struct descriptor_resource *r = |
695 | container_of(resource, struct descriptor_resource, resource); | |
3964a449 | 696 | |
97c18b7f SR |
697 | fw_core_remove_descriptor(&r->descriptor); |
698 | kfree(r); | |
3964a449 KH |
699 | } |
700 | ||
4f259223 | 701 | static int ioctl_add_descriptor(struct client *client, void *buffer) |
66dea3e5 | 702 | { |
4f259223 | 703 | struct fw_cdev_add_descriptor *request = buffer; |
97c18b7f | 704 | struct descriptor_resource *r; |
45ee3199 | 705 | int ret; |
66dea3e5 | 706 | |
4f259223 | 707 | if (request->length > 256) |
66dea3e5 KH |
708 | return -EINVAL; |
709 | ||
97c18b7f SR |
710 | r = kmalloc(sizeof(*r) + request->length * 4, GFP_KERNEL); |
711 | if (r == NULL) | |
66dea3e5 KH |
712 | return -ENOMEM; |
713 | ||
97c18b7f | 714 | if (copy_from_user(r->data, |
4f259223 | 715 | u64_to_uptr(request->data), request->length * 4)) { |
45ee3199 JF |
716 | ret = -EFAULT; |
717 | goto failed; | |
66dea3e5 KH |
718 | } |
719 | ||
97c18b7f SR |
720 | r->descriptor.length = request->length; |
721 | r->descriptor.immediate = request->immediate; | |
722 | r->descriptor.key = request->key; | |
723 | r->descriptor.data = r->data; | |
66dea3e5 | 724 | |
97c18b7f | 725 | ret = fw_core_add_descriptor(&r->descriptor); |
45ee3199 JF |
726 | if (ret < 0) |
727 | goto failed; | |
66dea3e5 | 728 | |
97c18b7f SR |
729 | r->resource.release = release_descriptor; |
730 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 731 | if (ret < 0) { |
97c18b7f | 732 | fw_core_remove_descriptor(&r->descriptor); |
45ee3199 JF |
733 | goto failed; |
734 | } | |
97c18b7f | 735 | request->handle = r->resource.handle; |
66dea3e5 KH |
736 | |
737 | return 0; | |
45ee3199 | 738 | failed: |
97c18b7f | 739 | kfree(r); |
45ee3199 JF |
740 | |
741 | return ret; | |
66dea3e5 KH |
742 | } |
743 | ||
4f259223 | 744 | static int ioctl_remove_descriptor(struct client *client, void *buffer) |
66dea3e5 | 745 | { |
4f259223 | 746 | struct fw_cdev_remove_descriptor *request = buffer; |
66dea3e5 | 747 | |
45ee3199 JF |
748 | return release_client_resource(client, request->handle, |
749 | release_descriptor, NULL); | |
66dea3e5 KH |
750 | } |
751 | ||
53dca511 SR |
752 | static void iso_callback(struct fw_iso_context *context, u32 cycle, |
753 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
754 | { |
755 | struct client *client = data; | |
97c18b7f | 756 | struct iso_interrupt_event *e; |
19a15b93 | 757 | |
97c18b7f SR |
758 | e = kzalloc(sizeof(*e) + header_length, GFP_ATOMIC); |
759 | if (e == NULL) | |
19a15b93 KH |
760 | return; |
761 | ||
97c18b7f SR |
762 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
763 | e->interrupt.closure = client->iso_closure; | |
764 | e->interrupt.cycle = cycle; | |
765 | e->interrupt.header_length = header_length; | |
766 | memcpy(e->interrupt.header, header, header_length); | |
767 | queue_event(client, &e->event, &e->interrupt, | |
768 | sizeof(e->interrupt) + header_length, NULL, 0); | |
19a15b93 KH |
769 | } |
770 | ||
4f259223 | 771 | static int ioctl_create_iso_context(struct client *client, void *buffer) |
19a15b93 | 772 | { |
4f259223 | 773 | struct fw_cdev_create_iso_context *request = buffer; |
24315c5e | 774 | struct fw_iso_context *context; |
19a15b93 | 775 | |
fae60312 SR |
776 | /* We only support one context at this time. */ |
777 | if (client->iso_context != NULL) | |
778 | return -EBUSY; | |
779 | ||
4f259223 | 780 | if (request->channel > 63) |
21efb3cf KH |
781 | return -EINVAL; |
782 | ||
4f259223 | 783 | switch (request->type) { |
c70dc788 | 784 | case FW_ISO_CONTEXT_RECEIVE: |
4f259223 | 785 | if (request->header_size < 4 || (request->header_size & 3)) |
c70dc788 | 786 | return -EINVAL; |
98b6cbe8 | 787 | |
c70dc788 KH |
788 | break; |
789 | ||
790 | case FW_ISO_CONTEXT_TRANSMIT: | |
4f259223 | 791 | if (request->speed > SCODE_3200) |
c70dc788 KH |
792 | return -EINVAL; |
793 | ||
794 | break; | |
795 | ||
796 | default: | |
21efb3cf | 797 | return -EINVAL; |
c70dc788 KH |
798 | } |
799 | ||
24315c5e KH |
800 | context = fw_iso_context_create(client->device->card, |
801 | request->type, | |
802 | request->channel, | |
803 | request->speed, | |
804 | request->header_size, | |
805 | iso_callback, client); | |
806 | if (IS_ERR(context)) | |
807 | return PTR_ERR(context); | |
808 | ||
abaa5743 | 809 | client->iso_closure = request->closure; |
24315c5e | 810 | client->iso_context = context; |
19a15b93 | 811 | |
abaa5743 KH |
812 | /* We only support one context at this time. */ |
813 | request->handle = 0; | |
814 | ||
19a15b93 KH |
815 | return 0; |
816 | } | |
817 | ||
1ca31ae7 KH |
818 | /* Macros for decoding the iso packet control header. */ |
819 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) | |
820 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) | |
821 | #define GET_SKIP(v) (((v) >> 17) & 0x01) | |
7a100344 SR |
822 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
823 | #define GET_SY(v) (((v) >> 20) & 0x0f) | |
1ca31ae7 KH |
824 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
825 | ||
4f259223 | 826 | static int ioctl_queue_iso(struct client *client, void *buffer) |
19a15b93 | 827 | { |
4f259223 | 828 | struct fw_cdev_queue_iso *request = buffer; |
19a15b93 | 829 | struct fw_cdev_iso_packet __user *p, *end, *next; |
9b32d5f3 | 830 | struct fw_iso_context *ctx = client->iso_context; |
ef370ee7 | 831 | unsigned long payload, buffer_end, header_length; |
1ca31ae7 | 832 | u32 control; |
19a15b93 KH |
833 | int count; |
834 | struct { | |
835 | struct fw_iso_packet packet; | |
836 | u8 header[256]; | |
837 | } u; | |
838 | ||
abaa5743 | 839 | if (ctx == NULL || request->handle != 0) |
19a15b93 | 840 | return -EINVAL; |
19a15b93 | 841 | |
c781c06d KH |
842 | /* |
843 | * If the user passes a non-NULL data pointer, has mmap()'ed | |
19a15b93 KH |
844 | * the iso buffer, and the pointer points inside the buffer, |
845 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 846 | * set them both to 0, which will still let packets with |
19a15b93 KH |
847 | * payload_length == 0 through. In other words, if no packets |
848 | * use the indirect payload, the iso buffer need not be mapped | |
c781c06d KH |
849 | * and the request->data pointer is ignored. |
850 | */ | |
19a15b93 | 851 | |
4f259223 | 852 | payload = (unsigned long)request->data - client->vm_start; |
ef370ee7 | 853 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
4f259223 | 854 | if (request->data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 855 | payload >= buffer_end) { |
9aad8125 | 856 | payload = 0; |
ef370ee7 | 857 | buffer_end = 0; |
19a15b93 KH |
858 | } |
859 | ||
1ccc9147 AV |
860 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(request->packets); |
861 | ||
862 | if (!access_ok(VERIFY_READ, p, request->size)) | |
19a15b93 KH |
863 | return -EFAULT; |
864 | ||
4f259223 | 865 | end = (void __user *)p + request->size; |
19a15b93 KH |
866 | count = 0; |
867 | while (p < end) { | |
1ca31ae7 | 868 | if (get_user(control, &p->control)) |
19a15b93 | 869 | return -EFAULT; |
1ca31ae7 KH |
870 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
871 | u.packet.interrupt = GET_INTERRUPT(control); | |
872 | u.packet.skip = GET_SKIP(control); | |
873 | u.packet.tag = GET_TAG(control); | |
874 | u.packet.sy = GET_SY(control); | |
875 | u.packet.header_length = GET_HEADER_LENGTH(control); | |
295e3feb | 876 | |
9b32d5f3 | 877 | if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) { |
295e3feb KH |
878 | header_length = u.packet.header_length; |
879 | } else { | |
c781c06d KH |
880 | /* |
881 | * We require that header_length is a multiple of | |
882 | * the fixed header size, ctx->header_size. | |
883 | */ | |
9b32d5f3 KH |
884 | if (ctx->header_size == 0) { |
885 | if (u.packet.header_length > 0) | |
886 | return -EINVAL; | |
887 | } else if (u.packet.header_length % ctx->header_size != 0) { | |
295e3feb | 888 | return -EINVAL; |
9b32d5f3 | 889 | } |
295e3feb KH |
890 | header_length = 0; |
891 | } | |
892 | ||
19a15b93 | 893 | next = (struct fw_cdev_iso_packet __user *) |
295e3feb | 894 | &p->header[header_length / 4]; |
19a15b93 KH |
895 | if (next > end) |
896 | return -EINVAL; | |
897 | if (__copy_from_user | |
295e3feb | 898 | (u.packet.header, p->header, header_length)) |
19a15b93 | 899 | return -EFAULT; |
98b6cbe8 | 900 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
901 | u.packet.header_length + u.packet.payload_length > 0) |
902 | return -EINVAL; | |
ef370ee7 | 903 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
904 | return -EINVAL; |
905 | ||
9b32d5f3 KH |
906 | if (fw_iso_context_queue(ctx, &u.packet, |
907 | &client->buffer, payload)) | |
19a15b93 KH |
908 | break; |
909 | ||
910 | p = next; | |
911 | payload += u.packet.payload_length; | |
912 | count++; | |
913 | } | |
914 | ||
4f259223 KH |
915 | request->size -= uptr_to_u64(p) - request->packets; |
916 | request->packets = uptr_to_u64(p); | |
917 | request->data = client->vm_start + payload; | |
19a15b93 KH |
918 | |
919 | return count; | |
920 | } | |
921 | ||
4f259223 | 922 | static int ioctl_start_iso(struct client *client, void *buffer) |
19a15b93 | 923 | { |
4f259223 | 924 | struct fw_cdev_start_iso *request = buffer; |
19a15b93 | 925 | |
fae60312 | 926 | if (client->iso_context == NULL || request->handle != 0) |
abaa5743 | 927 | return -EINVAL; |
fae60312 | 928 | |
eb0306ea | 929 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE) { |
4f259223 | 930 | if (request->tags == 0 || request->tags > 15) |
eb0306ea KH |
931 | return -EINVAL; |
932 | ||
4f259223 | 933 | if (request->sync > 15) |
eb0306ea KH |
934 | return -EINVAL; |
935 | } | |
936 | ||
4f259223 KH |
937 | return fw_iso_context_start(client->iso_context, request->cycle, |
938 | request->sync, request->tags); | |
19a15b93 KH |
939 | } |
940 | ||
4f259223 | 941 | static int ioctl_stop_iso(struct client *client, void *buffer) |
b8295668 | 942 | { |
abaa5743 KH |
943 | struct fw_cdev_stop_iso *request = buffer; |
944 | ||
fae60312 | 945 | if (client->iso_context == NULL || request->handle != 0) |
abaa5743 KH |
946 | return -EINVAL; |
947 | ||
b8295668 KH |
948 | return fw_iso_context_stop(client->iso_context); |
949 | } | |
950 | ||
a64408b9 SR |
951 | static int ioctl_get_cycle_timer(struct client *client, void *buffer) |
952 | { | |
953 | struct fw_cdev_get_cycle_timer *request = buffer; | |
954 | struct fw_card *card = client->device->card; | |
955 | unsigned long long bus_time; | |
956 | struct timeval tv; | |
957 | unsigned long flags; | |
958 | ||
959 | preempt_disable(); | |
960 | local_irq_save(flags); | |
961 | ||
962 | bus_time = card->driver->get_bus_time(card); | |
963 | do_gettimeofday(&tv); | |
964 | ||
965 | local_irq_restore(flags); | |
966 | preempt_enable(); | |
967 | ||
968 | request->local_time = tv.tv_sec * 1000000ULL + tv.tv_usec; | |
969 | request->cycle_timer = bus_time & 0xffffffff; | |
970 | return 0; | |
971 | } | |
972 | ||
4f259223 KH |
973 | static int (* const ioctl_handlers[])(struct client *client, void *buffer) = { |
974 | ioctl_get_info, | |
975 | ioctl_send_request, | |
976 | ioctl_allocate, | |
977 | ioctl_deallocate, | |
978 | ioctl_send_response, | |
979 | ioctl_initiate_bus_reset, | |
980 | ioctl_add_descriptor, | |
981 | ioctl_remove_descriptor, | |
982 | ioctl_create_iso_context, | |
983 | ioctl_queue_iso, | |
984 | ioctl_start_iso, | |
985 | ioctl_stop_iso, | |
a64408b9 | 986 | ioctl_get_cycle_timer, |
4f259223 KH |
987 | }; |
988 | ||
53dca511 SR |
989 | static int dispatch_ioctl(struct client *client, |
990 | unsigned int cmd, void __user *arg) | |
19a15b93 | 991 | { |
4f259223 | 992 | char buffer[256]; |
2dbd7d7e | 993 | int ret; |
4f259223 KH |
994 | |
995 | if (_IOC_TYPE(cmd) != '#' || | |
996 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers)) | |
19a15b93 | 997 | return -EINVAL; |
4f259223 KH |
998 | |
999 | if (_IOC_DIR(cmd) & _IOC_WRITE) { | |
2d826cc5 | 1000 | if (_IOC_SIZE(cmd) > sizeof(buffer) || |
4f259223 KH |
1001 | copy_from_user(buffer, arg, _IOC_SIZE(cmd))) |
1002 | return -EFAULT; | |
1003 | } | |
1004 | ||
2dbd7d7e SR |
1005 | ret = ioctl_handlers[_IOC_NR(cmd)](client, buffer); |
1006 | if (ret < 0) | |
1007 | return ret; | |
4f259223 KH |
1008 | |
1009 | if (_IOC_DIR(cmd) & _IOC_READ) { | |
2d826cc5 | 1010 | if (_IOC_SIZE(cmd) > sizeof(buffer) || |
4f259223 KH |
1011 | copy_to_user(arg, buffer, _IOC_SIZE(cmd))) |
1012 | return -EFAULT; | |
19a15b93 | 1013 | } |
4f259223 | 1014 | |
2dbd7d7e | 1015 | return ret; |
19a15b93 KH |
1016 | } |
1017 | ||
53dca511 SR |
1018 | static long fw_device_op_ioctl(struct file *file, |
1019 | unsigned int cmd, unsigned long arg) | |
19a15b93 KH |
1020 | { |
1021 | struct client *client = file->private_data; | |
1022 | ||
551f4cb9 JF |
1023 | if (fw_device_is_shutdown(client->device)) |
1024 | return -ENODEV; | |
1025 | ||
19a15b93 KH |
1026 | return dispatch_ioctl(client, cmd, (void __user *) arg); |
1027 | } | |
1028 | ||
1029 | #ifdef CONFIG_COMPAT | |
53dca511 SR |
1030 | static long fw_device_op_compat_ioctl(struct file *file, |
1031 | unsigned int cmd, unsigned long arg) | |
19a15b93 KH |
1032 | { |
1033 | struct client *client = file->private_data; | |
1034 | ||
551f4cb9 JF |
1035 | if (fw_device_is_shutdown(client->device)) |
1036 | return -ENODEV; | |
1037 | ||
19a15b93 KH |
1038 | return dispatch_ioctl(client, cmd, compat_ptr(arg)); |
1039 | } | |
1040 | #endif | |
1041 | ||
1042 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
1043 | { | |
1044 | struct client *client = file->private_data; | |
9aad8125 KH |
1045 | enum dma_data_direction direction; |
1046 | unsigned long size; | |
2dbd7d7e | 1047 | int page_count, ret; |
9aad8125 | 1048 | |
551f4cb9 JF |
1049 | if (fw_device_is_shutdown(client->device)) |
1050 | return -ENODEV; | |
1051 | ||
9aad8125 KH |
1052 | /* FIXME: We could support multiple buffers, but we don't. */ |
1053 | if (client->buffer.pages != NULL) | |
1054 | return -EBUSY; | |
1055 | ||
1056 | if (!(vma->vm_flags & VM_SHARED)) | |
1057 | return -EINVAL; | |
19a15b93 | 1058 | |
9aad8125 | 1059 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
1060 | return -EINVAL; |
1061 | ||
1062 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
1063 | size = vma->vm_end - vma->vm_start; |
1064 | page_count = size >> PAGE_SHIFT; | |
1065 | if (size & ~PAGE_MASK) | |
1066 | return -EINVAL; | |
1067 | ||
1068 | if (vma->vm_flags & VM_WRITE) | |
1069 | direction = DMA_TO_DEVICE; | |
1070 | else | |
1071 | direction = DMA_FROM_DEVICE; | |
1072 | ||
2dbd7d7e SR |
1073 | ret = fw_iso_buffer_init(&client->buffer, client->device->card, |
1074 | page_count, direction); | |
1075 | if (ret < 0) | |
1076 | return ret; | |
19a15b93 | 1077 | |
2dbd7d7e SR |
1078 | ret = fw_iso_buffer_map(&client->buffer, vma); |
1079 | if (ret < 0) | |
9aad8125 KH |
1080 | fw_iso_buffer_destroy(&client->buffer, client->device->card); |
1081 | ||
2dbd7d7e | 1082 | return ret; |
19a15b93 KH |
1083 | } |
1084 | ||
45ee3199 JF |
1085 | static int shutdown_resource(int id, void *p, void *data) |
1086 | { | |
1087 | struct client_resource *r = p; | |
1088 | struct client *client = data; | |
1089 | ||
1090 | r->release(client, r); | |
fb443036 | 1091 | client_put(client); |
45ee3199 JF |
1092 | |
1093 | return 0; | |
1094 | } | |
1095 | ||
19a15b93 KH |
1096 | static int fw_device_op_release(struct inode *inode, struct file *file) |
1097 | { | |
1098 | struct client *client = file->private_data; | |
2603bf21 | 1099 | struct event *e, *next_e; |
45ee3199 | 1100 | unsigned long flags; |
19a15b93 | 1101 | |
97811e34 SR |
1102 | mutex_lock(&client->device->client_list_mutex); |
1103 | list_del(&client->link); | |
1104 | mutex_unlock(&client->device->client_list_mutex); | |
1105 | ||
9aad8125 KH |
1106 | if (client->buffer.pages) |
1107 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
1108 | ||
19a15b93 KH |
1109 | if (client->iso_context) |
1110 | fw_iso_context_destroy(client->iso_context); | |
1111 | ||
45ee3199 JF |
1112 | /* Freeze client->resource_idr and client->event_list */ |
1113 | spin_lock_irqsave(&client->lock, flags); | |
1114 | client->in_shutdown = true; | |
1115 | spin_unlock_irqrestore(&client->lock, flags); | |
66dea3e5 | 1116 | |
45ee3199 JF |
1117 | idr_for_each(&client->resource_idr, shutdown_resource, client); |
1118 | idr_remove_all(&client->resource_idr); | |
1119 | idr_destroy(&client->resource_idr); | |
28cf6a04 | 1120 | |
2603bf21 KH |
1121 | list_for_each_entry_safe(e, next_e, &client->event_list, link) |
1122 | kfree(e); | |
19a15b93 | 1123 | |
fb443036 | 1124 | client_put(client); |
19a15b93 KH |
1125 | |
1126 | return 0; | |
1127 | } | |
1128 | ||
1129 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
1130 | { | |
1131 | struct client *client = file->private_data; | |
2603bf21 | 1132 | unsigned int mask = 0; |
19a15b93 KH |
1133 | |
1134 | poll_wait(file, &client->wait, pt); | |
1135 | ||
2603bf21 KH |
1136 | if (fw_device_is_shutdown(client->device)) |
1137 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 1138 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
1139 | mask |= POLLIN | POLLRDNORM; |
1140 | ||
1141 | return mask; | |
19a15b93 KH |
1142 | } |
1143 | ||
21ebcd12 | 1144 | const struct file_operations fw_device_ops = { |
19a15b93 KH |
1145 | .owner = THIS_MODULE, |
1146 | .open = fw_device_op_open, | |
1147 | .read = fw_device_op_read, | |
1148 | .unlocked_ioctl = fw_device_op_ioctl, | |
1149 | .poll = fw_device_op_poll, | |
1150 | .release = fw_device_op_release, | |
1151 | .mmap = fw_device_op_mmap, | |
1152 | ||
1153 | #ifdef CONFIG_COMPAT | |
5af4e5ea | 1154 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
1155 | #endif |
1156 | }; |