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> | |
77c9a5da | 25 | #include <linux/firewire.h> |
be5bbd67 SR |
26 | #include <linux/firewire-cdev.h> |
27 | #include <linux/idr.h> | |
4a9bde9b | 28 | #include <linux/irqflags.h> |
b1bda4cd | 29 | #include <linux/jiffies.h> |
19a15b93 | 30 | #include <linux/kernel.h> |
fb443036 | 31 | #include <linux/kref.h> |
be5bbd67 SR |
32 | #include <linux/mm.h> |
33 | #include <linux/module.h> | |
d67cfb96 | 34 | #include <linux/mutex.h> |
19a15b93 | 35 | #include <linux/poll.h> |
a99bbaf5 | 36 | #include <linux/sched.h> |
cf417e54 | 37 | #include <linux/spinlock.h> |
281e2032 | 38 | #include <linux/string.h> |
be5bbd67 | 39 | #include <linux/time.h> |
e034d242 | 40 | #include <linux/uaccess.h> |
be5bbd67 SR |
41 | #include <linux/vmalloc.h> |
42 | #include <linux/wait.h> | |
b1bda4cd | 43 | #include <linux/workqueue.h> |
be5bbd67 | 44 | |
a64408b9 | 45 | #include <asm/system.h> |
be5bbd67 | 46 | |
77c9a5da | 47 | #include "core.h" |
19a15b93 | 48 | |
19a15b93 | 49 | struct client { |
344bbc4d | 50 | u32 version; |
19a15b93 | 51 | struct fw_device *device; |
45ee3199 | 52 | |
19a15b93 | 53 | spinlock_t lock; |
45ee3199 JF |
54 | bool in_shutdown; |
55 | struct idr resource_idr; | |
19a15b93 | 56 | struct list_head event_list; |
19a15b93 | 57 | wait_queue_head_t wait; |
da8ecffa | 58 | u64 bus_reset_closure; |
9aad8125 | 59 | |
19a15b93 | 60 | struct fw_iso_context *iso_context; |
abaa5743 | 61 | u64 iso_closure; |
9aad8125 KH |
62 | struct fw_iso_buffer buffer; |
63 | unsigned long vm_start; | |
97bd9efa KH |
64 | |
65 | struct list_head link; | |
fb443036 | 66 | struct kref kref; |
19a15b93 KH |
67 | }; |
68 | ||
fb443036 SR |
69 | static inline void client_get(struct client *client) |
70 | { | |
71 | kref_get(&client->kref); | |
72 | } | |
73 | ||
74 | static void client_release(struct kref *kref) | |
75 | { | |
76 | struct client *client = container_of(kref, struct client, kref); | |
77 | ||
78 | fw_device_put(client->device); | |
79 | kfree(client); | |
80 | } | |
81 | ||
82 | static void client_put(struct client *client) | |
83 | { | |
84 | kref_put(&client->kref, client_release); | |
85 | } | |
86 | ||
97c18b7f SR |
87 | struct client_resource; |
88 | typedef void (*client_resource_release_fn_t)(struct client *, | |
89 | struct client_resource *); | |
90 | struct client_resource { | |
91 | client_resource_release_fn_t release; | |
92 | int handle; | |
93 | }; | |
94 | ||
95 | struct address_handler_resource { | |
96 | struct client_resource resource; | |
97 | struct fw_address_handler handler; | |
98 | __u64 closure; | |
99 | struct client *client; | |
100 | }; | |
101 | ||
102 | struct outbound_transaction_resource { | |
103 | struct client_resource resource; | |
104 | struct fw_transaction transaction; | |
105 | }; | |
106 | ||
107 | struct inbound_transaction_resource { | |
108 | struct client_resource resource; | |
109 | struct fw_request *request; | |
110 | void *data; | |
111 | size_t length; | |
112 | }; | |
113 | ||
114 | struct descriptor_resource { | |
115 | struct client_resource resource; | |
116 | struct fw_descriptor descriptor; | |
117 | u32 data[0]; | |
118 | }; | |
119 | ||
b1bda4cd JFSR |
120 | struct iso_resource { |
121 | struct client_resource resource; | |
122 | struct client *client; | |
123 | /* Schedule work and access todo only with client->lock held. */ | |
124 | struct delayed_work work; | |
1ec3c026 SR |
125 | enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC, |
126 | ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo; | |
b1bda4cd JFSR |
127 | int generation; |
128 | u64 channels; | |
129 | s32 bandwidth; | |
6fdc0370 | 130 | __be32 transaction_data[2]; |
b1bda4cd JFSR |
131 | struct iso_resource_event *e_alloc, *e_dealloc; |
132 | }; | |
133 | ||
b1bda4cd JFSR |
134 | static void release_iso_resource(struct client *, struct client_resource *); |
135 | ||
9fb551bf SR |
136 | static void schedule_iso_resource(struct iso_resource *r, unsigned long delay) |
137 | { | |
138 | client_get(r->client); | |
139 | if (!schedule_delayed_work(&r->work, delay)) | |
140 | client_put(r->client); | |
141 | } | |
142 | ||
143 | static void schedule_if_iso_resource(struct client_resource *resource) | |
144 | { | |
145 | if (resource->release == release_iso_resource) | |
146 | schedule_iso_resource(container_of(resource, | |
147 | struct iso_resource, resource), 0); | |
148 | } | |
149 | ||
97c18b7f SR |
150 | /* |
151 | * dequeue_event() just kfree()'s the event, so the event has to be | |
152 | * the first field in a struct XYZ_event. | |
153 | */ | |
154 | struct event { | |
155 | struct { void *data; size_t size; } v[2]; | |
156 | struct list_head link; | |
157 | }; | |
158 | ||
159 | struct bus_reset_event { | |
160 | struct event event; | |
161 | struct fw_cdev_event_bus_reset reset; | |
162 | }; | |
163 | ||
164 | struct outbound_transaction_event { | |
165 | struct event event; | |
166 | struct client *client; | |
167 | struct outbound_transaction_resource r; | |
168 | struct fw_cdev_event_response response; | |
169 | }; | |
170 | ||
171 | struct inbound_transaction_event { | |
172 | struct event event; | |
173 | struct fw_cdev_event_request request; | |
174 | }; | |
175 | ||
176 | struct iso_interrupt_event { | |
177 | struct event event; | |
178 | struct fw_cdev_event_iso_interrupt interrupt; | |
179 | }; | |
180 | ||
b1bda4cd JFSR |
181 | struct iso_resource_event { |
182 | struct event event; | |
e21fcf79 | 183 | struct fw_cdev_event_iso_resource iso_resource; |
b1bda4cd JFSR |
184 | }; |
185 | ||
53dca511 | 186 | static inline void __user *u64_to_uptr(__u64 value) |
19a15b93 KH |
187 | { |
188 | return (void __user *)(unsigned long)value; | |
189 | } | |
190 | ||
53dca511 | 191 | static inline __u64 uptr_to_u64(void __user *ptr) |
19a15b93 KH |
192 | { |
193 | return (__u64)(unsigned long)ptr; | |
194 | } | |
195 | ||
196 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
197 | { | |
198 | struct fw_device *device; | |
199 | struct client *client; | |
200 | ||
96b19062 | 201 | device = fw_device_get_by_devt(inode->i_rdev); |
a3aca3da KH |
202 | if (device == NULL) |
203 | return -ENODEV; | |
19a15b93 | 204 | |
551f4cb9 JF |
205 | if (fw_device_is_shutdown(device)) { |
206 | fw_device_put(device); | |
207 | return -ENODEV; | |
208 | } | |
209 | ||
2d826cc5 | 210 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
96b19062 SR |
211 | if (client == NULL) { |
212 | fw_device_put(device); | |
19a15b93 | 213 | return -ENOMEM; |
96b19062 | 214 | } |
19a15b93 | 215 | |
96b19062 | 216 | client->device = device; |
19a15b93 | 217 | spin_lock_init(&client->lock); |
45ee3199 JF |
218 | idr_init(&client->resource_idr); |
219 | INIT_LIST_HEAD(&client->event_list); | |
19a15b93 | 220 | init_waitqueue_head(&client->wait); |
fb443036 | 221 | kref_init(&client->kref); |
19a15b93 KH |
222 | |
223 | file->private_data = client; | |
224 | ||
d67cfb96 | 225 | mutex_lock(&device->client_list_mutex); |
97bd9efa | 226 | list_add_tail(&client->link, &device->client_list); |
d67cfb96 | 227 | mutex_unlock(&device->client_list_mutex); |
97bd9efa | 228 | |
19a15b93 KH |
229 | return 0; |
230 | } | |
231 | ||
232 | static void queue_event(struct client *client, struct event *event, | |
233 | void *data0, size_t size0, void *data1, size_t size1) | |
234 | { | |
235 | unsigned long flags; | |
236 | ||
237 | event->v[0].data = data0; | |
238 | event->v[0].size = size0; | |
239 | event->v[1].data = data1; | |
240 | event->v[1].size = size1; | |
241 | ||
242 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
243 | if (client->in_shutdown) |
244 | kfree(event); | |
245 | else | |
246 | list_add_tail(&event->link, &client->event_list); | |
19a15b93 | 247 | spin_unlock_irqrestore(&client->lock, flags); |
83431cba JF |
248 | |
249 | wake_up_interruptible(&client->wait); | |
19a15b93 KH |
250 | } |
251 | ||
53dca511 SR |
252 | static int dequeue_event(struct client *client, |
253 | char __user *buffer, size_t count) | |
19a15b93 | 254 | { |
19a15b93 KH |
255 | struct event *event; |
256 | size_t size, total; | |
2dbd7d7e | 257 | int i, ret; |
19a15b93 | 258 | |
2dbd7d7e SR |
259 | ret = wait_event_interruptible(client->wait, |
260 | !list_empty(&client->event_list) || | |
261 | fw_device_is_shutdown(client->device)); | |
262 | if (ret < 0) | |
263 | return ret; | |
19a15b93 | 264 | |
2603bf21 KH |
265 | if (list_empty(&client->event_list) && |
266 | fw_device_is_shutdown(client->device)) | |
267 | return -ENODEV; | |
19a15b93 | 268 | |
3ba94986 | 269 | spin_lock_irq(&client->lock); |
a459b8ab | 270 | event = list_first_entry(&client->event_list, struct event, link); |
19a15b93 | 271 | list_del(&event->link); |
3ba94986 | 272 | spin_unlock_irq(&client->lock); |
19a15b93 | 273 | |
19a15b93 KH |
274 | total = 0; |
275 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
276 | size = min(event->v[i].size, count - total); | |
2603bf21 | 277 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
2dbd7d7e | 278 | ret = -EFAULT; |
19a15b93 | 279 | goto out; |
2603bf21 | 280 | } |
19a15b93 KH |
281 | total += size; |
282 | } | |
2dbd7d7e | 283 | ret = total; |
19a15b93 KH |
284 | |
285 | out: | |
286 | kfree(event); | |
287 | ||
2dbd7d7e | 288 | return ret; |
19a15b93 KH |
289 | } |
290 | ||
53dca511 SR |
291 | static ssize_t fw_device_op_read(struct file *file, char __user *buffer, |
292 | size_t count, loff_t *offset) | |
19a15b93 KH |
293 | { |
294 | struct client *client = file->private_data; | |
295 | ||
296 | return dequeue_event(client, buffer, count); | |
297 | } | |
298 | ||
53dca511 SR |
299 | static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, |
300 | struct client *client) | |
344bbc4d | 301 | { |
da8ecffa | 302 | struct fw_card *card = client->device->card; |
cf417e54 | 303 | |
3ba94986 | 304 | spin_lock_irq(&card->lock); |
344bbc4d | 305 | |
da8ecffa | 306 | event->closure = client->bus_reset_closure; |
344bbc4d | 307 | event->type = FW_CDEV_EVENT_BUS_RESET; |
cf5a56ac | 308 | event->generation = client->device->generation; |
da8ecffa | 309 | event->node_id = client->device->node_id; |
344bbc4d KH |
310 | event->local_node_id = card->local_node->node_id; |
311 | event->bm_node_id = 0; /* FIXME: We don't track the BM. */ | |
312 | event->irm_node_id = card->irm_node->node_id; | |
313 | event->root_node_id = card->root_node->node_id; | |
cf417e54 | 314 | |
3ba94986 | 315 | spin_unlock_irq(&card->lock); |
344bbc4d KH |
316 | } |
317 | ||
53dca511 SR |
318 | static void for_each_client(struct fw_device *device, |
319 | void (*callback)(struct client *client)) | |
2603bf21 | 320 | { |
2603bf21 | 321 | struct client *c; |
2603bf21 | 322 | |
d67cfb96 | 323 | mutex_lock(&device->client_list_mutex); |
2603bf21 KH |
324 | list_for_each_entry(c, &device->client_list, link) |
325 | callback(c); | |
d67cfb96 | 326 | mutex_unlock(&device->client_list_mutex); |
2603bf21 KH |
327 | } |
328 | ||
b1bda4cd JFSR |
329 | static int schedule_reallocations(int id, void *p, void *data) |
330 | { | |
9fb551bf | 331 | schedule_if_iso_resource(p); |
b1bda4cd | 332 | |
b1bda4cd JFSR |
333 | return 0; |
334 | } | |
335 | ||
53dca511 | 336 | static void queue_bus_reset_event(struct client *client) |
97bd9efa | 337 | { |
97c18b7f | 338 | struct bus_reset_event *e; |
97bd9efa | 339 | |
97c18b7f SR |
340 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
341 | if (e == NULL) { | |
97bd9efa KH |
342 | fw_notify("Out of memory when allocating bus reset event\n"); |
343 | return; | |
344 | } | |
345 | ||
97c18b7f | 346 | fill_bus_reset_event(&e->reset, client); |
97bd9efa | 347 | |
97c18b7f SR |
348 | queue_event(client, &e->event, |
349 | &e->reset, sizeof(e->reset), NULL, 0); | |
b1bda4cd JFSR |
350 | |
351 | spin_lock_irq(&client->lock); | |
352 | idr_for_each(&client->resource_idr, schedule_reallocations, client); | |
353 | spin_unlock_irq(&client->lock); | |
97bd9efa KH |
354 | } |
355 | ||
356 | void fw_device_cdev_update(struct fw_device *device) | |
357 | { | |
2603bf21 KH |
358 | for_each_client(device, queue_bus_reset_event); |
359 | } | |
97bd9efa | 360 | |
2603bf21 KH |
361 | static void wake_up_client(struct client *client) |
362 | { | |
363 | wake_up_interruptible(&client->wait); | |
364 | } | |
97bd9efa | 365 | |
2603bf21 KH |
366 | void fw_device_cdev_remove(struct fw_device *device) |
367 | { | |
368 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
369 | } |
370 | ||
6e95dea7 SR |
371 | union ioctl_arg { |
372 | struct fw_cdev_get_info get_info; | |
373 | struct fw_cdev_send_request send_request; | |
374 | struct fw_cdev_allocate allocate; | |
375 | struct fw_cdev_deallocate deallocate; | |
376 | struct fw_cdev_send_response send_response; | |
377 | struct fw_cdev_initiate_bus_reset initiate_bus_reset; | |
378 | struct fw_cdev_add_descriptor add_descriptor; | |
379 | struct fw_cdev_remove_descriptor remove_descriptor; | |
380 | struct fw_cdev_create_iso_context create_iso_context; | |
381 | struct fw_cdev_queue_iso queue_iso; | |
382 | struct fw_cdev_start_iso start_iso; | |
383 | struct fw_cdev_stop_iso stop_iso; | |
384 | struct fw_cdev_get_cycle_timer get_cycle_timer; | |
385 | struct fw_cdev_allocate_iso_resource allocate_iso_resource; | |
386 | struct fw_cdev_send_stream_packet send_stream_packet; | |
387 | struct fw_cdev_get_cycle_timer2 get_cycle_timer2; | |
388 | }; | |
389 | ||
390 | static int ioctl_get_info(struct client *client, union ioctl_arg *arg) | |
19a15b93 | 391 | { |
6e95dea7 | 392 | struct fw_cdev_get_info *a = &arg->get_info; |
344bbc4d | 393 | struct fw_cdev_event_bus_reset bus_reset; |
c9755e14 | 394 | unsigned long ret = 0; |
344bbc4d | 395 | |
6e95dea7 SR |
396 | client->version = a->version; |
397 | a->version = FW_CDEV_VERSION; | |
398 | a->card = client->device->card->index; | |
344bbc4d | 399 | |
c9755e14 SR |
400 | down_read(&fw_device_rwsem); |
401 | ||
6e95dea7 SR |
402 | if (a->rom != 0) { |
403 | size_t want = a->rom_length; | |
d84702a5 | 404 | size_t have = client->device->config_rom_length * 4; |
344bbc4d | 405 | |
6e95dea7 SR |
406 | ret = copy_to_user(u64_to_uptr(a->rom), |
407 | client->device->config_rom, min(want, have)); | |
344bbc4d | 408 | } |
6e95dea7 | 409 | a->rom_length = client->device->config_rom_length * 4; |
344bbc4d | 410 | |
c9755e14 SR |
411 | up_read(&fw_device_rwsem); |
412 | ||
413 | if (ret != 0) | |
414 | return -EFAULT; | |
415 | ||
6e95dea7 SR |
416 | client->bus_reset_closure = a->bus_reset_closure; |
417 | if (a->bus_reset != 0) { | |
da8ecffa | 418 | fill_bus_reset_event(&bus_reset, client); |
6e95dea7 SR |
419 | if (copy_to_user(u64_to_uptr(a->bus_reset), |
420 | &bus_reset, sizeof(bus_reset))) | |
344bbc4d KH |
421 | return -EFAULT; |
422 | } | |
19a15b93 | 423 | |
19a15b93 KH |
424 | return 0; |
425 | } | |
426 | ||
53dca511 SR |
427 | static int add_client_resource(struct client *client, |
428 | struct client_resource *resource, gfp_t gfp_mask) | |
3964a449 KH |
429 | { |
430 | unsigned long flags; | |
45ee3199 JF |
431 | int ret; |
432 | ||
433 | retry: | |
434 | if (idr_pre_get(&client->resource_idr, gfp_mask) == 0) | |
435 | return -ENOMEM; | |
3964a449 KH |
436 | |
437 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
438 | if (client->in_shutdown) |
439 | ret = -ECANCELED; | |
440 | else | |
441 | ret = idr_get_new(&client->resource_idr, resource, | |
442 | &resource->handle); | |
b1bda4cd | 443 | if (ret >= 0) { |
fb443036 | 444 | client_get(client); |
9fb551bf | 445 | schedule_if_iso_resource(resource); |
b1bda4cd | 446 | } |
3964a449 | 447 | spin_unlock_irqrestore(&client->lock, flags); |
45ee3199 JF |
448 | |
449 | if (ret == -EAGAIN) | |
450 | goto retry; | |
451 | ||
452 | return ret < 0 ? ret : 0; | |
3964a449 KH |
453 | } |
454 | ||
53dca511 SR |
455 | static int release_client_resource(struct client *client, u32 handle, |
456 | client_resource_release_fn_t release, | |
e21fcf79 | 457 | struct client_resource **return_resource) |
3964a449 | 458 | { |
e21fcf79 | 459 | struct client_resource *resource; |
3964a449 | 460 | |
3ba94986 | 461 | spin_lock_irq(&client->lock); |
45ee3199 | 462 | if (client->in_shutdown) |
e21fcf79 | 463 | resource = NULL; |
45ee3199 | 464 | else |
e21fcf79 SR |
465 | resource = idr_find(&client->resource_idr, handle); |
466 | if (resource && resource->release == release) | |
45ee3199 | 467 | idr_remove(&client->resource_idr, handle); |
3ba94986 | 468 | spin_unlock_irq(&client->lock); |
3964a449 | 469 | |
e21fcf79 | 470 | if (!(resource && resource->release == release)) |
3964a449 KH |
471 | return -EINVAL; |
472 | ||
e21fcf79 SR |
473 | if (return_resource) |
474 | *return_resource = resource; | |
3964a449 | 475 | else |
e21fcf79 | 476 | resource->release(client, resource); |
3964a449 | 477 | |
fb443036 SR |
478 | client_put(client); |
479 | ||
3964a449 KH |
480 | return 0; |
481 | } | |
482 | ||
53dca511 SR |
483 | static void release_transaction(struct client *client, |
484 | struct client_resource *resource) | |
3964a449 | 485 | { |
97c18b7f SR |
486 | struct outbound_transaction_resource *r = container_of(resource, |
487 | struct outbound_transaction_resource, resource); | |
3964a449 | 488 | |
97c18b7f | 489 | fw_cancel_transaction(client->device->card, &r->transaction); |
3964a449 KH |
490 | } |
491 | ||
53dca511 SR |
492 | static void complete_transaction(struct fw_card *card, int rcode, |
493 | void *payload, size_t length, void *data) | |
19a15b93 | 494 | { |
97c18b7f SR |
495 | struct outbound_transaction_event *e = data; |
496 | struct fw_cdev_event_response *rsp = &e->response; | |
497 | struct client *client = e->client; | |
28cf6a04 | 498 | unsigned long flags; |
19a15b93 | 499 | |
97c18b7f SR |
500 | if (length < rsp->length) |
501 | rsp->length = length; | |
19a15b93 | 502 | if (rcode == RCODE_COMPLETE) |
97c18b7f | 503 | memcpy(rsp->data, payload, rsp->length); |
19a15b93 | 504 | |
28cf6a04 | 505 | spin_lock_irqsave(&client->lock, flags); |
45ee3199 | 506 | /* |
fb443036 SR |
507 | * 1. If called while in shutdown, the idr tree must be left untouched. |
508 | * The idr handle will be removed and the client reference will be | |
509 | * dropped later. | |
510 | * 2. If the call chain was release_client_resource -> | |
511 | * release_transaction -> complete_transaction (instead of a normal | |
512 | * conclusion of the transaction), i.e. if this resource was already | |
513 | * unregistered from the idr, the client reference will be dropped | |
514 | * by release_client_resource and we must not drop it here. | |
45ee3199 | 515 | */ |
fb443036 | 516 | if (!client->in_shutdown && |
97c18b7f SR |
517 | idr_find(&client->resource_idr, e->r.resource.handle)) { |
518 | idr_remove(&client->resource_idr, e->r.resource.handle); | |
fb443036 SR |
519 | /* Drop the idr's reference */ |
520 | client_put(client); | |
521 | } | |
28cf6a04 KH |
522 | spin_unlock_irqrestore(&client->lock, flags); |
523 | ||
97c18b7f SR |
524 | rsp->type = FW_CDEV_EVENT_RESPONSE; |
525 | rsp->rcode = rcode; | |
8401d92b DM |
526 | |
527 | /* | |
97c18b7f | 528 | * In the case that sizeof(*rsp) doesn't align with the position of the |
8401d92b DM |
529 | * data, and the read is short, preserve an extra copy of the data |
530 | * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless | |
531 | * for short reads and some apps depended on it, this is both safe | |
532 | * and prudent for compatibility. | |
533 | */ | |
97c18b7f SR |
534 | if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data)) |
535 | queue_event(client, &e->event, rsp, sizeof(*rsp), | |
536 | rsp->data, rsp->length); | |
8401d92b | 537 | else |
97c18b7f | 538 | queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length, |
8401d92b | 539 | NULL, 0); |
fb443036 SR |
540 | |
541 | /* Drop the transaction callback's reference */ | |
542 | client_put(client); | |
19a15b93 KH |
543 | } |
544 | ||
acfe8333 JFSR |
545 | static int init_request(struct client *client, |
546 | struct fw_cdev_send_request *request, | |
547 | int destination_id, int speed) | |
19a15b93 | 548 | { |
97c18b7f | 549 | struct outbound_transaction_event *e; |
1f3125af | 550 | int ret; |
19a15b93 | 551 | |
18e9b10f SR |
552 | if (request->tcode != TCODE_STREAM_DATA && |
553 | (request->length > 4096 || request->length > 512 << speed)) | |
5d3fd692 | 554 | return -EIO; |
19a15b93 | 555 | |
97c18b7f SR |
556 | e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL); |
557 | if (e == NULL) | |
19a15b93 KH |
558 | return -ENOMEM; |
559 | ||
97c18b7f SR |
560 | e->client = client; |
561 | e->response.length = request->length; | |
562 | e->response.closure = request->closure; | |
19a15b93 | 563 | |
4f259223 | 564 | if (request->data && |
97c18b7f | 565 | copy_from_user(e->response.data, |
4f259223 | 566 | u64_to_uptr(request->data), request->length)) { |
1f3125af | 567 | ret = -EFAULT; |
45ee3199 | 568 | goto failed; |
1f3125af SR |
569 | } |
570 | ||
97c18b7f SR |
571 | e->r.resource.release = release_transaction; |
572 | ret = add_client_resource(client, &e->r.resource, GFP_KERNEL); | |
45ee3199 JF |
573 | if (ret < 0) |
574 | goto failed; | |
28cf6a04 | 575 | |
fb443036 SR |
576 | /* Get a reference for the transaction callback */ |
577 | client_get(client); | |
578 | ||
acfe8333 | 579 | fw_send_request(client->device->card, &e->r.transaction, |
664d8010 SR |
580 | request->tcode, destination_id, request->generation, |
581 | speed, request->offset, e->response.data, | |
582 | request->length, complete_transaction, e); | |
583 | return 0; | |
19a15b93 | 584 | |
45ee3199 | 585 | failed: |
97c18b7f | 586 | kfree(e); |
1f3125af SR |
587 | |
588 | return ret; | |
19a15b93 KH |
589 | } |
590 | ||
6e95dea7 | 591 | static int ioctl_send_request(struct client *client, union ioctl_arg *arg) |
acfe8333 | 592 | { |
6e95dea7 | 593 | switch (arg->send_request.tcode) { |
acfe8333 JFSR |
594 | case TCODE_WRITE_QUADLET_REQUEST: |
595 | case TCODE_WRITE_BLOCK_REQUEST: | |
596 | case TCODE_READ_QUADLET_REQUEST: | |
597 | case TCODE_READ_BLOCK_REQUEST: | |
598 | case TCODE_LOCK_MASK_SWAP: | |
599 | case TCODE_LOCK_COMPARE_SWAP: | |
600 | case TCODE_LOCK_FETCH_ADD: | |
601 | case TCODE_LOCK_LITTLE_ADD: | |
602 | case TCODE_LOCK_BOUNDED_ADD: | |
603 | case TCODE_LOCK_WRAP_ADD: | |
604 | case TCODE_LOCK_VENDOR_DEPENDENT: | |
605 | break; | |
606 | default: | |
607 | return -EINVAL; | |
608 | } | |
609 | ||
6e95dea7 | 610 | return init_request(client, &arg->send_request, client->device->node_id, |
acfe8333 JFSR |
611 | client->device->max_speed); |
612 | } | |
613 | ||
281e2032 SR |
614 | static inline bool is_fcp_request(struct fw_request *request) |
615 | { | |
616 | return request == NULL; | |
617 | } | |
618 | ||
53dca511 SR |
619 | static void release_request(struct client *client, |
620 | struct client_resource *resource) | |
3964a449 | 621 | { |
97c18b7f SR |
622 | struct inbound_transaction_resource *r = container_of(resource, |
623 | struct inbound_transaction_resource, resource); | |
3964a449 | 624 | |
281e2032 SR |
625 | if (is_fcp_request(r->request)) |
626 | kfree(r->data); | |
627 | else | |
db5d247a CL |
628 | fw_send_response(client->device->card, r->request, |
629 | RCODE_CONFLICT_ERROR); | |
97c18b7f | 630 | kfree(r); |
3964a449 KH |
631 | } |
632 | ||
97c18b7f | 633 | static void handle_request(struct fw_card *card, struct fw_request *request, |
53dca511 SR |
634 | int tcode, int destination, int source, |
635 | int generation, int speed, | |
636 | unsigned long long offset, | |
637 | void *payload, size_t length, void *callback_data) | |
19a15b93 | 638 | { |
97c18b7f SR |
639 | struct address_handler_resource *handler = callback_data; |
640 | struct inbound_transaction_resource *r; | |
641 | struct inbound_transaction_event *e; | |
281e2032 | 642 | void *fcp_frame = NULL; |
45ee3199 | 643 | int ret; |
19a15b93 | 644 | |
97c18b7f | 645 | r = kmalloc(sizeof(*r), GFP_ATOMIC); |
2d826cc5 | 646 | e = kmalloc(sizeof(*e), GFP_ATOMIC); |
97c18b7f | 647 | if (r == NULL || e == NULL) |
45ee3199 | 648 | goto failed; |
19a15b93 | 649 | |
97c18b7f SR |
650 | r->request = request; |
651 | r->data = payload; | |
652 | r->length = length; | |
19a15b93 | 653 | |
281e2032 SR |
654 | if (is_fcp_request(request)) { |
655 | /* | |
656 | * FIXME: Let core-transaction.c manage a | |
657 | * single reference-counted copy? | |
658 | */ | |
659 | fcp_frame = kmemdup(payload, length, GFP_ATOMIC); | |
660 | if (fcp_frame == NULL) | |
661 | goto failed; | |
662 | ||
663 | r->data = fcp_frame; | |
664 | } | |
665 | ||
97c18b7f SR |
666 | r->resource.release = release_request; |
667 | ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC); | |
45ee3199 JF |
668 | if (ret < 0) |
669 | goto failed; | |
19a15b93 KH |
670 | |
671 | e->request.type = FW_CDEV_EVENT_REQUEST; | |
672 | e->request.tcode = tcode; | |
673 | e->request.offset = offset; | |
674 | e->request.length = length; | |
97c18b7f | 675 | e->request.handle = r->resource.handle; |
19a15b93 KH |
676 | e->request.closure = handler->closure; |
677 | ||
97c18b7f | 678 | queue_event(handler->client, &e->event, |
281e2032 | 679 | &e->request, sizeof(e->request), r->data, length); |
45ee3199 JF |
680 | return; |
681 | ||
682 | failed: | |
97c18b7f | 683 | kfree(r); |
45ee3199 | 684 | kfree(e); |
281e2032 SR |
685 | kfree(fcp_frame); |
686 | ||
687 | if (!is_fcp_request(request)) | |
db5d247a | 688 | fw_send_response(card, request, RCODE_CONFLICT_ERROR); |
19a15b93 KH |
689 | } |
690 | ||
53dca511 SR |
691 | static void release_address_handler(struct client *client, |
692 | struct client_resource *resource) | |
3964a449 | 693 | { |
97c18b7f SR |
694 | struct address_handler_resource *r = |
695 | container_of(resource, struct address_handler_resource, resource); | |
3964a449 | 696 | |
97c18b7f SR |
697 | fw_core_remove_address_handler(&r->handler); |
698 | kfree(r); | |
3964a449 KH |
699 | } |
700 | ||
6e95dea7 | 701 | static int ioctl_allocate(struct client *client, union ioctl_arg *arg) |
19a15b93 | 702 | { |
6e95dea7 | 703 | struct fw_cdev_allocate *a = &arg->allocate; |
97c18b7f | 704 | struct address_handler_resource *r; |
19a15b93 | 705 | struct fw_address_region region; |
45ee3199 | 706 | int ret; |
19a15b93 | 707 | |
97c18b7f SR |
708 | r = kmalloc(sizeof(*r), GFP_KERNEL); |
709 | if (r == NULL) | |
19a15b93 KH |
710 | return -ENOMEM; |
711 | ||
6e95dea7 SR |
712 | region.start = a->offset; |
713 | region.end = a->offset + a->length; | |
714 | r->handler.length = a->length; | |
97c18b7f | 715 | r->handler.address_callback = handle_request; |
6e95dea7 SR |
716 | r->handler.callback_data = r; |
717 | r->closure = a->closure; | |
718 | r->client = client; | |
19a15b93 | 719 | |
97c18b7f | 720 | ret = fw_core_add_address_handler(&r->handler, ®ion); |
3e0b5f0d | 721 | if (ret < 0) { |
97c18b7f | 722 | kfree(r); |
3e0b5f0d | 723 | return ret; |
19a15b93 KH |
724 | } |
725 | ||
97c18b7f SR |
726 | r->resource.release = release_address_handler; |
727 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 728 | if (ret < 0) { |
97c18b7f | 729 | release_address_handler(client, &r->resource); |
45ee3199 JF |
730 | return ret; |
731 | } | |
6e95dea7 | 732 | a->handle = r->resource.handle; |
19a15b93 KH |
733 | |
734 | return 0; | |
735 | } | |
736 | ||
6e95dea7 | 737 | static int ioctl_deallocate(struct client *client, union ioctl_arg *arg) |
9472316b | 738 | { |
6e95dea7 | 739 | return release_client_resource(client, arg->deallocate.handle, |
45ee3199 | 740 | release_address_handler, NULL); |
9472316b KH |
741 | } |
742 | ||
6e95dea7 | 743 | static int ioctl_send_response(struct client *client, union ioctl_arg *arg) |
19a15b93 | 744 | { |
6e95dea7 | 745 | struct fw_cdev_send_response *a = &arg->send_response; |
3964a449 | 746 | struct client_resource *resource; |
97c18b7f | 747 | struct inbound_transaction_resource *r; |
7e44c0b5 | 748 | int ret = 0; |
19a15b93 | 749 | |
6e95dea7 | 750 | if (release_client_resource(client, a->handle, |
45ee3199 | 751 | release_request, &resource) < 0) |
19a15b93 | 752 | return -EINVAL; |
45ee3199 | 753 | |
97c18b7f SR |
754 | r = container_of(resource, struct inbound_transaction_resource, |
755 | resource); | |
281e2032 SR |
756 | if (is_fcp_request(r->request)) |
757 | goto out; | |
758 | ||
6e95dea7 SR |
759 | if (a->length < r->length) |
760 | r->length = a->length; | |
761 | if (copy_from_user(r->data, u64_to_uptr(a->data), r->length)) { | |
281e2032 SR |
762 | ret = -EFAULT; |
763 | kfree(r->request); | |
764 | goto out; | |
7e44c0b5 | 765 | } |
6e95dea7 | 766 | fw_send_response(client->device->card, r->request, a->rcode); |
7e44c0b5 | 767 | out: |
19a15b93 KH |
768 | kfree(r); |
769 | ||
7e44c0b5 | 770 | return ret; |
19a15b93 KH |
771 | } |
772 | ||
6e95dea7 | 773 | static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg) |
5371842b | 774 | { |
6e95dea7 SR |
775 | return fw_core_initiate_bus_reset(client->device->card, |
776 | arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET); | |
5371842b KH |
777 | } |
778 | ||
3964a449 KH |
779 | static void release_descriptor(struct client *client, |
780 | struct client_resource *resource) | |
781 | { | |
97c18b7f SR |
782 | struct descriptor_resource *r = |
783 | container_of(resource, struct descriptor_resource, resource); | |
3964a449 | 784 | |
97c18b7f SR |
785 | fw_core_remove_descriptor(&r->descriptor); |
786 | kfree(r); | |
3964a449 KH |
787 | } |
788 | ||
6e95dea7 | 789 | static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 790 | { |
6e95dea7 | 791 | struct fw_cdev_add_descriptor *a = &arg->add_descriptor; |
97c18b7f | 792 | struct descriptor_resource *r; |
45ee3199 | 793 | int ret; |
66dea3e5 | 794 | |
de487da8 | 795 | /* Access policy: Allow this ioctl only on local nodes' device files. */ |
92368890 | 796 | if (!client->device->is_local) |
de487da8 SR |
797 | return -ENOSYS; |
798 | ||
6e95dea7 | 799 | if (a->length > 256) |
66dea3e5 KH |
800 | return -EINVAL; |
801 | ||
6e95dea7 | 802 | r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL); |
97c18b7f | 803 | if (r == NULL) |
66dea3e5 KH |
804 | return -ENOMEM; |
805 | ||
6e95dea7 | 806 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) { |
45ee3199 JF |
807 | ret = -EFAULT; |
808 | goto failed; | |
66dea3e5 KH |
809 | } |
810 | ||
6e95dea7 SR |
811 | r->descriptor.length = a->length; |
812 | r->descriptor.immediate = a->immediate; | |
813 | r->descriptor.key = a->key; | |
97c18b7f | 814 | r->descriptor.data = r->data; |
66dea3e5 | 815 | |
97c18b7f | 816 | ret = fw_core_add_descriptor(&r->descriptor); |
45ee3199 JF |
817 | if (ret < 0) |
818 | goto failed; | |
66dea3e5 | 819 | |
97c18b7f SR |
820 | r->resource.release = release_descriptor; |
821 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 822 | if (ret < 0) { |
97c18b7f | 823 | fw_core_remove_descriptor(&r->descriptor); |
45ee3199 JF |
824 | goto failed; |
825 | } | |
6e95dea7 | 826 | a->handle = r->resource.handle; |
66dea3e5 KH |
827 | |
828 | return 0; | |
45ee3199 | 829 | failed: |
97c18b7f | 830 | kfree(r); |
45ee3199 JF |
831 | |
832 | return ret; | |
66dea3e5 KH |
833 | } |
834 | ||
6e95dea7 | 835 | static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 836 | { |
6e95dea7 | 837 | return release_client_resource(client, arg->remove_descriptor.handle, |
45ee3199 | 838 | release_descriptor, NULL); |
66dea3e5 KH |
839 | } |
840 | ||
53dca511 SR |
841 | static void iso_callback(struct fw_iso_context *context, u32 cycle, |
842 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
843 | { |
844 | struct client *client = data; | |
97c18b7f | 845 | struct iso_interrupt_event *e; |
19a15b93 | 846 | |
97c18b7f SR |
847 | e = kzalloc(sizeof(*e) + header_length, GFP_ATOMIC); |
848 | if (e == NULL) | |
19a15b93 KH |
849 | return; |
850 | ||
97c18b7f SR |
851 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
852 | e->interrupt.closure = client->iso_closure; | |
853 | e->interrupt.cycle = cycle; | |
854 | e->interrupt.header_length = header_length; | |
855 | memcpy(e->interrupt.header, header, header_length); | |
856 | queue_event(client, &e->event, &e->interrupt, | |
857 | sizeof(e->interrupt) + header_length, NULL, 0); | |
19a15b93 KH |
858 | } |
859 | ||
6e95dea7 | 860 | static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) |
19a15b93 | 861 | { |
6e95dea7 | 862 | struct fw_cdev_create_iso_context *a = &arg->create_iso_context; |
24315c5e | 863 | struct fw_iso_context *context; |
19a15b93 | 864 | |
fae60312 SR |
865 | /* We only support one context at this time. */ |
866 | if (client->iso_context != NULL) | |
867 | return -EBUSY; | |
868 | ||
6e95dea7 | 869 | if (a->channel > 63) |
21efb3cf KH |
870 | return -EINVAL; |
871 | ||
6e95dea7 | 872 | switch (a->type) { |
c70dc788 | 873 | case FW_ISO_CONTEXT_RECEIVE: |
6e95dea7 | 874 | if (a->header_size < 4 || (a->header_size & 3)) |
c70dc788 | 875 | return -EINVAL; |
c70dc788 KH |
876 | break; |
877 | ||
878 | case FW_ISO_CONTEXT_TRANSMIT: | |
6e95dea7 | 879 | if (a->speed > SCODE_3200) |
c70dc788 | 880 | return -EINVAL; |
c70dc788 KH |
881 | break; |
882 | ||
883 | default: | |
21efb3cf | 884 | return -EINVAL; |
c70dc788 KH |
885 | } |
886 | ||
6e95dea7 SR |
887 | context = fw_iso_context_create(client->device->card, a->type, |
888 | a->channel, a->speed, a->header_size, | |
889 | iso_callback, client); | |
24315c5e KH |
890 | if (IS_ERR(context)) |
891 | return PTR_ERR(context); | |
892 | ||
6e95dea7 | 893 | client->iso_closure = a->closure; |
24315c5e | 894 | client->iso_context = context; |
19a15b93 | 895 | |
abaa5743 | 896 | /* We only support one context at this time. */ |
6e95dea7 | 897 | a->handle = 0; |
abaa5743 | 898 | |
19a15b93 KH |
899 | return 0; |
900 | } | |
901 | ||
1ca31ae7 KH |
902 | /* Macros for decoding the iso packet control header. */ |
903 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) | |
904 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) | |
905 | #define GET_SKIP(v) (((v) >> 17) & 0x01) | |
7a100344 SR |
906 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
907 | #define GET_SY(v) (((v) >> 20) & 0x0f) | |
1ca31ae7 KH |
908 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
909 | ||
6e95dea7 | 910 | static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 911 | { |
6e95dea7 | 912 | struct fw_cdev_queue_iso *a = &arg->queue_iso; |
19a15b93 | 913 | struct fw_cdev_iso_packet __user *p, *end, *next; |
9b32d5f3 | 914 | struct fw_iso_context *ctx = client->iso_context; |
ef370ee7 | 915 | unsigned long payload, buffer_end, header_length; |
1ca31ae7 | 916 | u32 control; |
19a15b93 KH |
917 | int count; |
918 | struct { | |
919 | struct fw_iso_packet packet; | |
920 | u8 header[256]; | |
921 | } u; | |
922 | ||
6e95dea7 | 923 | if (ctx == NULL || a->handle != 0) |
19a15b93 | 924 | return -EINVAL; |
19a15b93 | 925 | |
c781c06d KH |
926 | /* |
927 | * If the user passes a non-NULL data pointer, has mmap()'ed | |
19a15b93 KH |
928 | * the iso buffer, and the pointer points inside the buffer, |
929 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 930 | * set them both to 0, which will still let packets with |
19a15b93 KH |
931 | * payload_length == 0 through. In other words, if no packets |
932 | * use the indirect payload, the iso buffer need not be mapped | |
6e95dea7 | 933 | * and the a->data pointer is ignored. |
c781c06d | 934 | */ |
19a15b93 | 935 | |
6e95dea7 | 936 | payload = (unsigned long)a->data - client->vm_start; |
ef370ee7 | 937 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
6e95dea7 | 938 | if (a->data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 939 | payload >= buffer_end) { |
9aad8125 | 940 | payload = 0; |
ef370ee7 | 941 | buffer_end = 0; |
19a15b93 KH |
942 | } |
943 | ||
6e95dea7 | 944 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets); |
1ccc9147 | 945 | |
6e95dea7 | 946 | if (!access_ok(VERIFY_READ, p, a->size)) |
19a15b93 KH |
947 | return -EFAULT; |
948 | ||
6e95dea7 | 949 | end = (void __user *)p + a->size; |
19a15b93 KH |
950 | count = 0; |
951 | while (p < end) { | |
1ca31ae7 | 952 | if (get_user(control, &p->control)) |
19a15b93 | 953 | return -EFAULT; |
1ca31ae7 KH |
954 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
955 | u.packet.interrupt = GET_INTERRUPT(control); | |
956 | u.packet.skip = GET_SKIP(control); | |
957 | u.packet.tag = GET_TAG(control); | |
958 | u.packet.sy = GET_SY(control); | |
959 | u.packet.header_length = GET_HEADER_LENGTH(control); | |
295e3feb | 960 | |
9b32d5f3 | 961 | if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) { |
295e3feb KH |
962 | header_length = u.packet.header_length; |
963 | } else { | |
c781c06d KH |
964 | /* |
965 | * We require that header_length is a multiple of | |
966 | * the fixed header size, ctx->header_size. | |
967 | */ | |
9b32d5f3 KH |
968 | if (ctx->header_size == 0) { |
969 | if (u.packet.header_length > 0) | |
970 | return -EINVAL; | |
971 | } else if (u.packet.header_length % ctx->header_size != 0) { | |
295e3feb | 972 | return -EINVAL; |
9b32d5f3 | 973 | } |
295e3feb KH |
974 | header_length = 0; |
975 | } | |
976 | ||
19a15b93 | 977 | next = (struct fw_cdev_iso_packet __user *) |
295e3feb | 978 | &p->header[header_length / 4]; |
19a15b93 KH |
979 | if (next > end) |
980 | return -EINVAL; | |
981 | if (__copy_from_user | |
295e3feb | 982 | (u.packet.header, p->header, header_length)) |
19a15b93 | 983 | return -EFAULT; |
98b6cbe8 | 984 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
985 | u.packet.header_length + u.packet.payload_length > 0) |
986 | return -EINVAL; | |
ef370ee7 | 987 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
988 | return -EINVAL; |
989 | ||
9b32d5f3 KH |
990 | if (fw_iso_context_queue(ctx, &u.packet, |
991 | &client->buffer, payload)) | |
19a15b93 KH |
992 | break; |
993 | ||
994 | p = next; | |
995 | payload += u.packet.payload_length; | |
996 | count++; | |
997 | } | |
998 | ||
6e95dea7 SR |
999 | a->size -= uptr_to_u64(p) - a->packets; |
1000 | a->packets = uptr_to_u64(p); | |
1001 | a->data = client->vm_start + payload; | |
19a15b93 KH |
1002 | |
1003 | return count; | |
1004 | } | |
1005 | ||
6e95dea7 | 1006 | static int ioctl_start_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1007 | { |
6e95dea7 | 1008 | struct fw_cdev_start_iso *a = &arg->start_iso; |
19a15b93 | 1009 | |
6e95dea7 | 1010 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 | 1011 | return -EINVAL; |
fae60312 | 1012 | |
6e95dea7 SR |
1013 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE && |
1014 | (a->tags == 0 || a->tags > 15 || a->sync > 15)) | |
1015 | return -EINVAL; | |
eb0306ea | 1016 | |
6e95dea7 SR |
1017 | return fw_iso_context_start(client->iso_context, |
1018 | a->cycle, a->sync, a->tags); | |
19a15b93 KH |
1019 | } |
1020 | ||
6e95dea7 | 1021 | static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg) |
b8295668 | 1022 | { |
6e95dea7 | 1023 | struct fw_cdev_stop_iso *a = &arg->stop_iso; |
abaa5743 | 1024 | |
6e95dea7 | 1025 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 KH |
1026 | return -EINVAL; |
1027 | ||
b8295668 KH |
1028 | return fw_iso_context_stop(client->iso_context); |
1029 | } | |
1030 | ||
6e95dea7 | 1031 | static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg) |
a64408b9 | 1032 | { |
6e95dea7 | 1033 | struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2; |
a64408b9 | 1034 | struct fw_card *card = client->device->card; |
abfe5a01 | 1035 | struct timespec ts = {0, 0}; |
4a9bde9b | 1036 | u32 cycle_time; |
abfe5a01 | 1037 | int ret = 0; |
a64408b9 | 1038 | |
4a9bde9b | 1039 | local_irq_disable(); |
a64408b9 | 1040 | |
168cf9af | 1041 | cycle_time = card->driver->get_cycle_time(card); |
abfe5a01 | 1042 | |
6e95dea7 | 1043 | switch (a->clk_id) { |
abfe5a01 SR |
1044 | case CLOCK_REALTIME: getnstimeofday(&ts); break; |
1045 | case CLOCK_MONOTONIC: do_posix_clock_monotonic_gettime(&ts); break; | |
1046 | case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts); break; | |
1047 | default: | |
1048 | ret = -EINVAL; | |
1049 | } | |
a64408b9 | 1050 | |
4a9bde9b | 1051 | local_irq_enable(); |
a64408b9 | 1052 | |
6e95dea7 SR |
1053 | a->tv_sec = ts.tv_sec; |
1054 | a->tv_nsec = ts.tv_nsec; | |
1055 | a->cycle_timer = cycle_time; | |
abfe5a01 SR |
1056 | |
1057 | return ret; | |
1058 | } | |
1059 | ||
6e95dea7 | 1060 | static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg) |
abfe5a01 | 1061 | { |
6e95dea7 | 1062 | struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer; |
abfe5a01 SR |
1063 | struct fw_cdev_get_cycle_timer2 ct2; |
1064 | ||
1065 | ct2.clk_id = CLOCK_REALTIME; | |
6e95dea7 | 1066 | ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2); |
abfe5a01 | 1067 | |
6e95dea7 SR |
1068 | a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC; |
1069 | a->cycle_timer = ct2.cycle_timer; | |
4a9bde9b | 1070 | |
a64408b9 SR |
1071 | return 0; |
1072 | } | |
1073 | ||
b1bda4cd JFSR |
1074 | static void iso_resource_work(struct work_struct *work) |
1075 | { | |
1076 | struct iso_resource_event *e; | |
1077 | struct iso_resource *r = | |
1078 | container_of(work, struct iso_resource, work.work); | |
1079 | struct client *client = r->client; | |
1080 | int generation, channel, bandwidth, todo; | |
1081 | bool skip, free, success; | |
1082 | ||
1083 | spin_lock_irq(&client->lock); | |
1084 | generation = client->device->generation; | |
1085 | todo = r->todo; | |
1086 | /* Allow 1000ms grace period for other reallocations. */ | |
1087 | if (todo == ISO_RES_ALLOC && | |
1088 | time_is_after_jiffies(client->device->card->reset_jiffies + HZ)) { | |
9fb551bf | 1089 | schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3)); |
b1bda4cd JFSR |
1090 | skip = true; |
1091 | } else { | |
1092 | /* We could be called twice within the same generation. */ | |
1093 | skip = todo == ISO_RES_REALLOC && | |
1094 | r->generation == generation; | |
1095 | } | |
1ec3c026 SR |
1096 | free = todo == ISO_RES_DEALLOC || |
1097 | todo == ISO_RES_ALLOC_ONCE || | |
1098 | todo == ISO_RES_DEALLOC_ONCE; | |
b1bda4cd JFSR |
1099 | r->generation = generation; |
1100 | spin_unlock_irq(&client->lock); | |
1101 | ||
1102 | if (skip) | |
1103 | goto out; | |
1104 | ||
1105 | bandwidth = r->bandwidth; | |
1106 | ||
1107 | fw_iso_resource_manage(client->device->card, generation, | |
1108 | r->channels, &channel, &bandwidth, | |
1ec3c026 SR |
1109 | todo == ISO_RES_ALLOC || |
1110 | todo == ISO_RES_REALLOC || | |
6fdc0370 SR |
1111 | todo == ISO_RES_ALLOC_ONCE, |
1112 | r->transaction_data); | |
b1bda4cd JFSR |
1113 | /* |
1114 | * Is this generation outdated already? As long as this resource sticks | |
1115 | * in the idr, it will be scheduled again for a newer generation or at | |
1116 | * shutdown. | |
1117 | */ | |
1118 | if (channel == -EAGAIN && | |
1119 | (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC)) | |
1120 | goto out; | |
1121 | ||
1122 | success = channel >= 0 || bandwidth > 0; | |
1123 | ||
1124 | spin_lock_irq(&client->lock); | |
1125 | /* | |
1126 | * Transit from allocation to reallocation, except if the client | |
1127 | * requested deallocation in the meantime. | |
1128 | */ | |
1129 | if (r->todo == ISO_RES_ALLOC) | |
1130 | r->todo = ISO_RES_REALLOC; | |
1131 | /* | |
1132 | * Allocation or reallocation failure? Pull this resource out of the | |
1133 | * idr and prepare for deletion, unless the client is shutting down. | |
1134 | */ | |
1135 | if (r->todo == ISO_RES_REALLOC && !success && | |
1136 | !client->in_shutdown && | |
1137 | idr_find(&client->resource_idr, r->resource.handle)) { | |
1138 | idr_remove(&client->resource_idr, r->resource.handle); | |
1139 | client_put(client); | |
1140 | free = true; | |
1141 | } | |
1142 | spin_unlock_irq(&client->lock); | |
1143 | ||
1144 | if (todo == ISO_RES_ALLOC && channel >= 0) | |
5d9cb7d2 | 1145 | r->channels = 1ULL << channel; |
b1bda4cd JFSR |
1146 | |
1147 | if (todo == ISO_RES_REALLOC && success) | |
1148 | goto out; | |
1149 | ||
1ec3c026 | 1150 | if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) { |
b1bda4cd JFSR |
1151 | e = r->e_alloc; |
1152 | r->e_alloc = NULL; | |
1153 | } else { | |
1154 | e = r->e_dealloc; | |
1155 | r->e_dealloc = NULL; | |
1156 | } | |
e21fcf79 SR |
1157 | e->iso_resource.handle = r->resource.handle; |
1158 | e->iso_resource.channel = channel; | |
1159 | e->iso_resource.bandwidth = bandwidth; | |
b1bda4cd JFSR |
1160 | |
1161 | queue_event(client, &e->event, | |
e21fcf79 | 1162 | &e->iso_resource, sizeof(e->iso_resource), NULL, 0); |
b1bda4cd JFSR |
1163 | |
1164 | if (free) { | |
1165 | cancel_delayed_work(&r->work); | |
1166 | kfree(r->e_alloc); | |
1167 | kfree(r->e_dealloc); | |
1168 | kfree(r); | |
1169 | } | |
1170 | out: | |
1171 | client_put(client); | |
1172 | } | |
1173 | ||
b1bda4cd JFSR |
1174 | static void release_iso_resource(struct client *client, |
1175 | struct client_resource *resource) | |
1176 | { | |
1177 | struct iso_resource *r = | |
1178 | container_of(resource, struct iso_resource, resource); | |
1179 | ||
1180 | spin_lock_irq(&client->lock); | |
1181 | r->todo = ISO_RES_DEALLOC; | |
9fb551bf | 1182 | schedule_iso_resource(r, 0); |
b1bda4cd JFSR |
1183 | spin_unlock_irq(&client->lock); |
1184 | } | |
1185 | ||
1ec3c026 SR |
1186 | static int init_iso_resource(struct client *client, |
1187 | struct fw_cdev_allocate_iso_resource *request, int todo) | |
b1bda4cd | 1188 | { |
b1bda4cd JFSR |
1189 | struct iso_resource_event *e1, *e2; |
1190 | struct iso_resource *r; | |
1191 | int ret; | |
1192 | ||
1193 | if ((request->channels == 0 && request->bandwidth == 0) || | |
1194 | request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL || | |
1195 | request->bandwidth < 0) | |
1196 | return -EINVAL; | |
1197 | ||
1198 | r = kmalloc(sizeof(*r), GFP_KERNEL); | |
1199 | e1 = kmalloc(sizeof(*e1), GFP_KERNEL); | |
1200 | e2 = kmalloc(sizeof(*e2), GFP_KERNEL); | |
1201 | if (r == NULL || e1 == NULL || e2 == NULL) { | |
1202 | ret = -ENOMEM; | |
1203 | goto fail; | |
1204 | } | |
1205 | ||
1206 | INIT_DELAYED_WORK(&r->work, iso_resource_work); | |
1207 | r->client = client; | |
1ec3c026 | 1208 | r->todo = todo; |
b1bda4cd JFSR |
1209 | r->generation = -1; |
1210 | r->channels = request->channels; | |
1211 | r->bandwidth = request->bandwidth; | |
1212 | r->e_alloc = e1; | |
1213 | r->e_dealloc = e2; | |
1214 | ||
e21fcf79 SR |
1215 | e1->iso_resource.closure = request->closure; |
1216 | e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED; | |
1217 | e2->iso_resource.closure = request->closure; | |
1218 | e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED; | |
b1bda4cd | 1219 | |
1ec3c026 SR |
1220 | if (todo == ISO_RES_ALLOC) { |
1221 | r->resource.release = release_iso_resource; | |
1222 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
81610b8f SR |
1223 | if (ret < 0) |
1224 | goto fail; | |
1ec3c026 SR |
1225 | } else { |
1226 | r->resource.release = NULL; | |
1227 | r->resource.handle = -1; | |
9fb551bf | 1228 | schedule_iso_resource(r, 0); |
1ec3c026 | 1229 | } |
b1bda4cd JFSR |
1230 | request->handle = r->resource.handle; |
1231 | ||
1232 | return 0; | |
1233 | fail: | |
1234 | kfree(r); | |
1235 | kfree(e1); | |
1236 | kfree(e2); | |
1237 | ||
1238 | return ret; | |
1239 | } | |
1240 | ||
6e95dea7 SR |
1241 | static int ioctl_allocate_iso_resource(struct client *client, |
1242 | union ioctl_arg *arg) | |
1ec3c026 | 1243 | { |
6e95dea7 SR |
1244 | return init_iso_resource(client, |
1245 | &arg->allocate_iso_resource, ISO_RES_ALLOC); | |
1ec3c026 SR |
1246 | } |
1247 | ||
6e95dea7 SR |
1248 | static int ioctl_deallocate_iso_resource(struct client *client, |
1249 | union ioctl_arg *arg) | |
b1bda4cd | 1250 | { |
6e95dea7 SR |
1251 | return release_client_resource(client, |
1252 | arg->deallocate.handle, release_iso_resource, NULL); | |
b1bda4cd JFSR |
1253 | } |
1254 | ||
6e95dea7 SR |
1255 | static int ioctl_allocate_iso_resource_once(struct client *client, |
1256 | union ioctl_arg *arg) | |
1ec3c026 | 1257 | { |
6e95dea7 SR |
1258 | return init_iso_resource(client, |
1259 | &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE); | |
1ec3c026 SR |
1260 | } |
1261 | ||
6e95dea7 SR |
1262 | static int ioctl_deallocate_iso_resource_once(struct client *client, |
1263 | union ioctl_arg *arg) | |
1ec3c026 | 1264 | { |
6e95dea7 SR |
1265 | return init_iso_resource(client, |
1266 | &arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE); | |
1ec3c026 SR |
1267 | } |
1268 | ||
c8a25900 SR |
1269 | /* |
1270 | * Returns a speed code: Maximum speed to or from this device, | |
1271 | * limited by the device's link speed, the local node's link speed, | |
1272 | * and all PHY port speeds between the two links. | |
1273 | */ | |
6e95dea7 | 1274 | static int ioctl_get_speed(struct client *client, union ioctl_arg *arg) |
33580a3e | 1275 | { |
c8a25900 | 1276 | return client->device->max_speed; |
33580a3e SR |
1277 | } |
1278 | ||
6e95dea7 SR |
1279 | static int ioctl_send_broadcast_request(struct client *client, |
1280 | union ioctl_arg *arg) | |
acfe8333 | 1281 | { |
6e95dea7 | 1282 | struct fw_cdev_send_request *a = &arg->send_request; |
acfe8333 | 1283 | |
6e95dea7 | 1284 | switch (a->tcode) { |
acfe8333 JFSR |
1285 | case TCODE_WRITE_QUADLET_REQUEST: |
1286 | case TCODE_WRITE_BLOCK_REQUEST: | |
1287 | break; | |
1288 | default: | |
1289 | return -EINVAL; | |
1290 | } | |
1291 | ||
1566f3dc | 1292 | /* Security policy: Only allow accesses to Units Space. */ |
6e95dea7 | 1293 | if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END) |
1566f3dc SR |
1294 | return -EACCES; |
1295 | ||
6e95dea7 | 1296 | return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100); |
acfe8333 JFSR |
1297 | } |
1298 | ||
6e95dea7 | 1299 | static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg) |
f8c2287c | 1300 | { |
6e95dea7 | 1301 | struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet; |
18e9b10f SR |
1302 | struct fw_cdev_send_request request; |
1303 | int dest; | |
f8c2287c | 1304 | |
6e95dea7 SR |
1305 | if (a->speed > client->device->card->link_speed || |
1306 | a->length > 1024 << a->speed) | |
18e9b10f | 1307 | return -EIO; |
f8c2287c | 1308 | |
6e95dea7 | 1309 | if (a->tag > 3 || a->channel > 63 || a->sy > 15) |
18e9b10f SR |
1310 | return -EINVAL; |
1311 | ||
6e95dea7 | 1312 | dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy); |
18e9b10f | 1313 | request.tcode = TCODE_STREAM_DATA; |
6e95dea7 SR |
1314 | request.length = a->length; |
1315 | request.closure = a->closure; | |
1316 | request.data = a->data; | |
1317 | request.generation = a->generation; | |
18e9b10f | 1318 | |
6e95dea7 | 1319 | return init_request(client, &request, dest, a->speed); |
f8c2287c JF |
1320 | } |
1321 | ||
6e95dea7 | 1322 | static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = { |
4f259223 KH |
1323 | ioctl_get_info, |
1324 | ioctl_send_request, | |
1325 | ioctl_allocate, | |
1326 | ioctl_deallocate, | |
1327 | ioctl_send_response, | |
1328 | ioctl_initiate_bus_reset, | |
1329 | ioctl_add_descriptor, | |
1330 | ioctl_remove_descriptor, | |
1331 | ioctl_create_iso_context, | |
1332 | ioctl_queue_iso, | |
1333 | ioctl_start_iso, | |
1334 | ioctl_stop_iso, | |
a64408b9 | 1335 | ioctl_get_cycle_timer, |
b1bda4cd JFSR |
1336 | ioctl_allocate_iso_resource, |
1337 | ioctl_deallocate_iso_resource, | |
1ec3c026 SR |
1338 | ioctl_allocate_iso_resource_once, |
1339 | ioctl_deallocate_iso_resource_once, | |
33580a3e | 1340 | ioctl_get_speed, |
acfe8333 | 1341 | ioctl_send_broadcast_request, |
f8c2287c | 1342 | ioctl_send_stream_packet, |
abfe5a01 | 1343 | ioctl_get_cycle_timer2, |
4f259223 KH |
1344 | }; |
1345 | ||
53dca511 SR |
1346 | static int dispatch_ioctl(struct client *client, |
1347 | unsigned int cmd, void __user *arg) | |
19a15b93 | 1348 | { |
6e95dea7 | 1349 | union ioctl_arg buffer; |
2dbd7d7e | 1350 | int ret; |
4f259223 | 1351 | |
64582298 SR |
1352 | if (fw_device_is_shutdown(client->device)) |
1353 | return -ENODEV; | |
1354 | ||
4f259223 KH |
1355 | if (_IOC_TYPE(cmd) != '#' || |
1356 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers)) | |
19a15b93 | 1357 | return -EINVAL; |
4f259223 KH |
1358 | |
1359 | if (_IOC_DIR(cmd) & _IOC_WRITE) { | |
2d826cc5 | 1360 | if (_IOC_SIZE(cmd) > sizeof(buffer) || |
6e95dea7 | 1361 | copy_from_user(&buffer, arg, _IOC_SIZE(cmd))) |
4f259223 KH |
1362 | return -EFAULT; |
1363 | } | |
1364 | ||
6e95dea7 | 1365 | ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer); |
2dbd7d7e SR |
1366 | if (ret < 0) |
1367 | return ret; | |
4f259223 KH |
1368 | |
1369 | if (_IOC_DIR(cmd) & _IOC_READ) { | |
2d826cc5 | 1370 | if (_IOC_SIZE(cmd) > sizeof(buffer) || |
6e95dea7 | 1371 | copy_to_user(arg, &buffer, _IOC_SIZE(cmd))) |
4f259223 | 1372 | return -EFAULT; |
19a15b93 | 1373 | } |
4f259223 | 1374 | |
2dbd7d7e | 1375 | return ret; |
19a15b93 KH |
1376 | } |
1377 | ||
53dca511 SR |
1378 | static long fw_device_op_ioctl(struct file *file, |
1379 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1380 | { |
64582298 | 1381 | return dispatch_ioctl(file->private_data, cmd, (void __user *)arg); |
19a15b93 KH |
1382 | } |
1383 | ||
1384 | #ifdef CONFIG_COMPAT | |
53dca511 SR |
1385 | static long fw_device_op_compat_ioctl(struct file *file, |
1386 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1387 | { |
64582298 | 1388 | return dispatch_ioctl(file->private_data, cmd, compat_ptr(arg)); |
19a15b93 KH |
1389 | } |
1390 | #endif | |
1391 | ||
1392 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
1393 | { | |
1394 | struct client *client = file->private_data; | |
9aad8125 KH |
1395 | enum dma_data_direction direction; |
1396 | unsigned long size; | |
2dbd7d7e | 1397 | int page_count, ret; |
9aad8125 | 1398 | |
551f4cb9 JF |
1399 | if (fw_device_is_shutdown(client->device)) |
1400 | return -ENODEV; | |
1401 | ||
9aad8125 KH |
1402 | /* FIXME: We could support multiple buffers, but we don't. */ |
1403 | if (client->buffer.pages != NULL) | |
1404 | return -EBUSY; | |
1405 | ||
1406 | if (!(vma->vm_flags & VM_SHARED)) | |
1407 | return -EINVAL; | |
19a15b93 | 1408 | |
9aad8125 | 1409 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
1410 | return -EINVAL; |
1411 | ||
1412 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
1413 | size = vma->vm_end - vma->vm_start; |
1414 | page_count = size >> PAGE_SHIFT; | |
1415 | if (size & ~PAGE_MASK) | |
1416 | return -EINVAL; | |
1417 | ||
1418 | if (vma->vm_flags & VM_WRITE) | |
1419 | direction = DMA_TO_DEVICE; | |
1420 | else | |
1421 | direction = DMA_FROM_DEVICE; | |
1422 | ||
2dbd7d7e SR |
1423 | ret = fw_iso_buffer_init(&client->buffer, client->device->card, |
1424 | page_count, direction); | |
1425 | if (ret < 0) | |
1426 | return ret; | |
19a15b93 | 1427 | |
2dbd7d7e SR |
1428 | ret = fw_iso_buffer_map(&client->buffer, vma); |
1429 | if (ret < 0) | |
9aad8125 KH |
1430 | fw_iso_buffer_destroy(&client->buffer, client->device->card); |
1431 | ||
2dbd7d7e | 1432 | return ret; |
19a15b93 KH |
1433 | } |
1434 | ||
45ee3199 JF |
1435 | static int shutdown_resource(int id, void *p, void *data) |
1436 | { | |
e21fcf79 | 1437 | struct client_resource *resource = p; |
45ee3199 JF |
1438 | struct client *client = data; |
1439 | ||
e21fcf79 | 1440 | resource->release(client, resource); |
fb443036 | 1441 | client_put(client); |
45ee3199 JF |
1442 | |
1443 | return 0; | |
1444 | } | |
1445 | ||
19a15b93 KH |
1446 | static int fw_device_op_release(struct inode *inode, struct file *file) |
1447 | { | |
1448 | struct client *client = file->private_data; | |
e21fcf79 | 1449 | struct event *event, *next_event; |
19a15b93 | 1450 | |
97811e34 SR |
1451 | mutex_lock(&client->device->client_list_mutex); |
1452 | list_del(&client->link); | |
1453 | mutex_unlock(&client->device->client_list_mutex); | |
1454 | ||
19a15b93 KH |
1455 | if (client->iso_context) |
1456 | fw_iso_context_destroy(client->iso_context); | |
1457 | ||
36a755cf SR |
1458 | if (client->buffer.pages) |
1459 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
1460 | ||
45ee3199 | 1461 | /* Freeze client->resource_idr and client->event_list */ |
3ba94986 | 1462 | spin_lock_irq(&client->lock); |
45ee3199 | 1463 | client->in_shutdown = true; |
3ba94986 | 1464 | spin_unlock_irq(&client->lock); |
66dea3e5 | 1465 | |
45ee3199 JF |
1466 | idr_for_each(&client->resource_idr, shutdown_resource, client); |
1467 | idr_remove_all(&client->resource_idr); | |
1468 | idr_destroy(&client->resource_idr); | |
28cf6a04 | 1469 | |
e21fcf79 SR |
1470 | list_for_each_entry_safe(event, next_event, &client->event_list, link) |
1471 | kfree(event); | |
19a15b93 | 1472 | |
fb443036 | 1473 | client_put(client); |
19a15b93 KH |
1474 | |
1475 | return 0; | |
1476 | } | |
1477 | ||
1478 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
1479 | { | |
1480 | struct client *client = file->private_data; | |
2603bf21 | 1481 | unsigned int mask = 0; |
19a15b93 KH |
1482 | |
1483 | poll_wait(file, &client->wait, pt); | |
1484 | ||
2603bf21 KH |
1485 | if (fw_device_is_shutdown(client->device)) |
1486 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 1487 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
1488 | mask |= POLLIN | POLLRDNORM; |
1489 | ||
1490 | return mask; | |
19a15b93 KH |
1491 | } |
1492 | ||
21ebcd12 | 1493 | const struct file_operations fw_device_ops = { |
19a15b93 KH |
1494 | .owner = THIS_MODULE, |
1495 | .open = fw_device_op_open, | |
1496 | .read = fw_device_op_read, | |
1497 | .unlocked_ioctl = fw_device_op_ioctl, | |
1498 | .poll = fw_device_op_poll, | |
1499 | .release = fw_device_op_release, | |
1500 | .mmap = fw_device_op_mmap, | |
1501 | ||
1502 | #ifdef CONFIG_COMPAT | |
5af4e5ea | 1503 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
1504 | #endif |
1505 | }; |