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> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
cf417e54 | 38 | #include <linux/spinlock.h> |
281e2032 | 39 | #include <linux/string.h> |
be5bbd67 | 40 | #include <linux/time.h> |
e034d242 | 41 | #include <linux/uaccess.h> |
be5bbd67 SR |
42 | #include <linux/vmalloc.h> |
43 | #include <linux/wait.h> | |
b1bda4cd | 44 | #include <linux/workqueue.h> |
be5bbd67 | 45 | |
a64408b9 | 46 | #include <asm/system.h> |
be5bbd67 | 47 | |
77c9a5da | 48 | #include "core.h" |
19a15b93 | 49 | |
19a15b93 | 50 | struct client { |
344bbc4d | 51 | u32 version; |
19a15b93 | 52 | struct fw_device *device; |
45ee3199 | 53 | |
19a15b93 | 54 | spinlock_t lock; |
45ee3199 JF |
55 | bool in_shutdown; |
56 | struct idr resource_idr; | |
19a15b93 | 57 | struct list_head event_list; |
19a15b93 | 58 | wait_queue_head_t wait; |
da8ecffa | 59 | u64 bus_reset_closure; |
9aad8125 | 60 | |
19a15b93 | 61 | struct fw_iso_context *iso_context; |
abaa5743 | 62 | u64 iso_closure; |
9aad8125 KH |
63 | struct fw_iso_buffer buffer; |
64 | unsigned long vm_start; | |
97bd9efa KH |
65 | |
66 | struct list_head link; | |
fb443036 | 67 | struct kref kref; |
19a15b93 KH |
68 | }; |
69 | ||
fb443036 SR |
70 | static inline void client_get(struct client *client) |
71 | { | |
72 | kref_get(&client->kref); | |
73 | } | |
74 | ||
75 | static void client_release(struct kref *kref) | |
76 | { | |
77 | struct client *client = container_of(kref, struct client, kref); | |
78 | ||
79 | fw_device_put(client->device); | |
80 | kfree(client); | |
81 | } | |
82 | ||
83 | static void client_put(struct client *client) | |
84 | { | |
85 | kref_put(&client->kref, client_release); | |
86 | } | |
87 | ||
97c18b7f SR |
88 | struct client_resource; |
89 | typedef void (*client_resource_release_fn_t)(struct client *, | |
90 | struct client_resource *); | |
91 | struct client_resource { | |
92 | client_resource_release_fn_t release; | |
93 | int handle; | |
94 | }; | |
95 | ||
96 | struct address_handler_resource { | |
97 | struct client_resource resource; | |
98 | struct fw_address_handler handler; | |
99 | __u64 closure; | |
100 | struct client *client; | |
101 | }; | |
102 | ||
103 | struct outbound_transaction_resource { | |
104 | struct client_resource resource; | |
105 | struct fw_transaction transaction; | |
106 | }; | |
107 | ||
108 | struct inbound_transaction_resource { | |
109 | struct client_resource resource; | |
110 | struct fw_request *request; | |
111 | void *data; | |
112 | size_t length; | |
113 | }; | |
114 | ||
115 | struct descriptor_resource { | |
116 | struct client_resource resource; | |
117 | struct fw_descriptor descriptor; | |
118 | u32 data[0]; | |
119 | }; | |
120 | ||
b1bda4cd JFSR |
121 | struct iso_resource { |
122 | struct client_resource resource; | |
123 | struct client *client; | |
124 | /* Schedule work and access todo only with client->lock held. */ | |
125 | struct delayed_work work; | |
1ec3c026 SR |
126 | enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC, |
127 | ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo; | |
b1bda4cd JFSR |
128 | int generation; |
129 | u64 channels; | |
130 | s32 bandwidth; | |
6fdc0370 | 131 | __be32 transaction_data[2]; |
b1bda4cd JFSR |
132 | struct iso_resource_event *e_alloc, *e_dealloc; |
133 | }; | |
134 | ||
b1bda4cd JFSR |
135 | static void release_iso_resource(struct client *, struct client_resource *); |
136 | ||
9fb551bf SR |
137 | static void schedule_iso_resource(struct iso_resource *r, unsigned long delay) |
138 | { | |
139 | client_get(r->client); | |
140 | if (!schedule_delayed_work(&r->work, delay)) | |
141 | client_put(r->client); | |
142 | } | |
143 | ||
144 | static void schedule_if_iso_resource(struct client_resource *resource) | |
145 | { | |
146 | if (resource->release == release_iso_resource) | |
147 | schedule_iso_resource(container_of(resource, | |
148 | struct iso_resource, resource), 0); | |
149 | } | |
150 | ||
97c18b7f SR |
151 | /* |
152 | * dequeue_event() just kfree()'s the event, so the event has to be | |
153 | * the first field in a struct XYZ_event. | |
154 | */ | |
155 | struct event { | |
156 | struct { void *data; size_t size; } v[2]; | |
157 | struct list_head link; | |
158 | }; | |
159 | ||
160 | struct bus_reset_event { | |
161 | struct event event; | |
162 | struct fw_cdev_event_bus_reset reset; | |
163 | }; | |
164 | ||
165 | struct outbound_transaction_event { | |
166 | struct event event; | |
167 | struct client *client; | |
168 | struct outbound_transaction_resource r; | |
169 | struct fw_cdev_event_response response; | |
170 | }; | |
171 | ||
172 | struct inbound_transaction_event { | |
173 | struct event event; | |
174 | struct fw_cdev_event_request request; | |
175 | }; | |
176 | ||
177 | struct iso_interrupt_event { | |
178 | struct event event; | |
179 | struct fw_cdev_event_iso_interrupt interrupt; | |
180 | }; | |
181 | ||
b1bda4cd JFSR |
182 | struct iso_resource_event { |
183 | struct event event; | |
e21fcf79 | 184 | struct fw_cdev_event_iso_resource iso_resource; |
b1bda4cd JFSR |
185 | }; |
186 | ||
53dca511 | 187 | static inline void __user *u64_to_uptr(__u64 value) |
19a15b93 KH |
188 | { |
189 | return (void __user *)(unsigned long)value; | |
190 | } | |
191 | ||
53dca511 | 192 | static inline __u64 uptr_to_u64(void __user *ptr) |
19a15b93 KH |
193 | { |
194 | return (__u64)(unsigned long)ptr; | |
195 | } | |
196 | ||
197 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
198 | { | |
199 | struct fw_device *device; | |
200 | struct client *client; | |
201 | ||
96b19062 | 202 | device = fw_device_get_by_devt(inode->i_rdev); |
a3aca3da KH |
203 | if (device == NULL) |
204 | return -ENODEV; | |
19a15b93 | 205 | |
551f4cb9 JF |
206 | if (fw_device_is_shutdown(device)) { |
207 | fw_device_put(device); | |
208 | return -ENODEV; | |
209 | } | |
210 | ||
2d826cc5 | 211 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
96b19062 SR |
212 | if (client == NULL) { |
213 | fw_device_put(device); | |
19a15b93 | 214 | return -ENOMEM; |
96b19062 | 215 | } |
19a15b93 | 216 | |
96b19062 | 217 | client->device = device; |
19a15b93 | 218 | spin_lock_init(&client->lock); |
45ee3199 JF |
219 | idr_init(&client->resource_idr); |
220 | INIT_LIST_HEAD(&client->event_list); | |
19a15b93 | 221 | init_waitqueue_head(&client->wait); |
fb443036 | 222 | kref_init(&client->kref); |
19a15b93 KH |
223 | |
224 | file->private_data = client; | |
225 | ||
d67cfb96 | 226 | mutex_lock(&device->client_list_mutex); |
97bd9efa | 227 | list_add_tail(&client->link, &device->client_list); |
d67cfb96 | 228 | mutex_unlock(&device->client_list_mutex); |
97bd9efa | 229 | |
19a15b93 KH |
230 | return 0; |
231 | } | |
232 | ||
233 | static void queue_event(struct client *client, struct event *event, | |
234 | void *data0, size_t size0, void *data1, size_t size1) | |
235 | { | |
236 | unsigned long flags; | |
237 | ||
238 | event->v[0].data = data0; | |
239 | event->v[0].size = size0; | |
240 | event->v[1].data = data1; | |
241 | event->v[1].size = size1; | |
242 | ||
243 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
244 | if (client->in_shutdown) |
245 | kfree(event); | |
246 | else | |
247 | list_add_tail(&event->link, &client->event_list); | |
19a15b93 | 248 | spin_unlock_irqrestore(&client->lock, flags); |
83431cba JF |
249 | |
250 | wake_up_interruptible(&client->wait); | |
19a15b93 KH |
251 | } |
252 | ||
53dca511 SR |
253 | static int dequeue_event(struct client *client, |
254 | char __user *buffer, size_t count) | |
19a15b93 | 255 | { |
19a15b93 KH |
256 | struct event *event; |
257 | size_t size, total; | |
2dbd7d7e | 258 | int i, ret; |
19a15b93 | 259 | |
2dbd7d7e SR |
260 | ret = wait_event_interruptible(client->wait, |
261 | !list_empty(&client->event_list) || | |
262 | fw_device_is_shutdown(client->device)); | |
263 | if (ret < 0) | |
264 | return ret; | |
19a15b93 | 265 | |
2603bf21 KH |
266 | if (list_empty(&client->event_list) && |
267 | fw_device_is_shutdown(client->device)) | |
268 | return -ENODEV; | |
19a15b93 | 269 | |
3ba94986 | 270 | spin_lock_irq(&client->lock); |
a459b8ab | 271 | event = list_first_entry(&client->event_list, struct event, link); |
19a15b93 | 272 | list_del(&event->link); |
3ba94986 | 273 | spin_unlock_irq(&client->lock); |
19a15b93 | 274 | |
19a15b93 KH |
275 | total = 0; |
276 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
277 | size = min(event->v[i].size, count - total); | |
2603bf21 | 278 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
2dbd7d7e | 279 | ret = -EFAULT; |
19a15b93 | 280 | goto out; |
2603bf21 | 281 | } |
19a15b93 KH |
282 | total += size; |
283 | } | |
2dbd7d7e | 284 | ret = total; |
19a15b93 KH |
285 | |
286 | out: | |
287 | kfree(event); | |
288 | ||
2dbd7d7e | 289 | return ret; |
19a15b93 KH |
290 | } |
291 | ||
53dca511 SR |
292 | static ssize_t fw_device_op_read(struct file *file, char __user *buffer, |
293 | size_t count, loff_t *offset) | |
19a15b93 KH |
294 | { |
295 | struct client *client = file->private_data; | |
296 | ||
297 | return dequeue_event(client, buffer, count); | |
298 | } | |
299 | ||
53dca511 SR |
300 | static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, |
301 | struct client *client) | |
344bbc4d | 302 | { |
da8ecffa | 303 | struct fw_card *card = client->device->card; |
cf417e54 | 304 | |
3ba94986 | 305 | spin_lock_irq(&card->lock); |
344bbc4d | 306 | |
da8ecffa | 307 | event->closure = client->bus_reset_closure; |
344bbc4d | 308 | event->type = FW_CDEV_EVENT_BUS_RESET; |
cf5a56ac | 309 | event->generation = client->device->generation; |
da8ecffa | 310 | event->node_id = client->device->node_id; |
344bbc4d KH |
311 | event->local_node_id = card->local_node->node_id; |
312 | event->bm_node_id = 0; /* FIXME: We don't track the BM. */ | |
313 | event->irm_node_id = card->irm_node->node_id; | |
314 | event->root_node_id = card->root_node->node_id; | |
cf417e54 | 315 | |
3ba94986 | 316 | spin_unlock_irq(&card->lock); |
344bbc4d KH |
317 | } |
318 | ||
53dca511 SR |
319 | static void for_each_client(struct fw_device *device, |
320 | void (*callback)(struct client *client)) | |
2603bf21 | 321 | { |
2603bf21 | 322 | struct client *c; |
2603bf21 | 323 | |
d67cfb96 | 324 | mutex_lock(&device->client_list_mutex); |
2603bf21 KH |
325 | list_for_each_entry(c, &device->client_list, link) |
326 | callback(c); | |
d67cfb96 | 327 | mutex_unlock(&device->client_list_mutex); |
2603bf21 KH |
328 | } |
329 | ||
b1bda4cd JFSR |
330 | static int schedule_reallocations(int id, void *p, void *data) |
331 | { | |
9fb551bf | 332 | schedule_if_iso_resource(p); |
b1bda4cd | 333 | |
b1bda4cd JFSR |
334 | return 0; |
335 | } | |
336 | ||
53dca511 | 337 | static void queue_bus_reset_event(struct client *client) |
97bd9efa | 338 | { |
97c18b7f | 339 | struct bus_reset_event *e; |
97bd9efa | 340 | |
97c18b7f SR |
341 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
342 | if (e == NULL) { | |
97bd9efa KH |
343 | fw_notify("Out of memory when allocating bus reset event\n"); |
344 | return; | |
345 | } | |
346 | ||
97c18b7f | 347 | fill_bus_reset_event(&e->reset, client); |
97bd9efa | 348 | |
97c18b7f SR |
349 | queue_event(client, &e->event, |
350 | &e->reset, sizeof(e->reset), NULL, 0); | |
b1bda4cd JFSR |
351 | |
352 | spin_lock_irq(&client->lock); | |
353 | idr_for_each(&client->resource_idr, schedule_reallocations, client); | |
354 | spin_unlock_irq(&client->lock); | |
97bd9efa KH |
355 | } |
356 | ||
357 | void fw_device_cdev_update(struct fw_device *device) | |
358 | { | |
2603bf21 KH |
359 | for_each_client(device, queue_bus_reset_event); |
360 | } | |
97bd9efa | 361 | |
2603bf21 KH |
362 | static void wake_up_client(struct client *client) |
363 | { | |
364 | wake_up_interruptible(&client->wait); | |
365 | } | |
97bd9efa | 366 | |
2603bf21 KH |
367 | void fw_device_cdev_remove(struct fw_device *device) |
368 | { | |
369 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
370 | } |
371 | ||
6e95dea7 SR |
372 | union ioctl_arg { |
373 | struct fw_cdev_get_info get_info; | |
374 | struct fw_cdev_send_request send_request; | |
375 | struct fw_cdev_allocate allocate; | |
376 | struct fw_cdev_deallocate deallocate; | |
377 | struct fw_cdev_send_response send_response; | |
378 | struct fw_cdev_initiate_bus_reset initiate_bus_reset; | |
379 | struct fw_cdev_add_descriptor add_descriptor; | |
380 | struct fw_cdev_remove_descriptor remove_descriptor; | |
381 | struct fw_cdev_create_iso_context create_iso_context; | |
382 | struct fw_cdev_queue_iso queue_iso; | |
383 | struct fw_cdev_start_iso start_iso; | |
384 | struct fw_cdev_stop_iso stop_iso; | |
385 | struct fw_cdev_get_cycle_timer get_cycle_timer; | |
386 | struct fw_cdev_allocate_iso_resource allocate_iso_resource; | |
387 | struct fw_cdev_send_stream_packet send_stream_packet; | |
388 | struct fw_cdev_get_cycle_timer2 get_cycle_timer2; | |
389 | }; | |
390 | ||
391 | static int ioctl_get_info(struct client *client, union ioctl_arg *arg) | |
19a15b93 | 392 | { |
6e95dea7 | 393 | struct fw_cdev_get_info *a = &arg->get_info; |
344bbc4d | 394 | struct fw_cdev_event_bus_reset bus_reset; |
c9755e14 | 395 | unsigned long ret = 0; |
344bbc4d | 396 | |
6e95dea7 SR |
397 | client->version = a->version; |
398 | a->version = FW_CDEV_VERSION; | |
399 | a->card = client->device->card->index; | |
344bbc4d | 400 | |
c9755e14 SR |
401 | down_read(&fw_device_rwsem); |
402 | ||
6e95dea7 SR |
403 | if (a->rom != 0) { |
404 | size_t want = a->rom_length; | |
d84702a5 | 405 | size_t have = client->device->config_rom_length * 4; |
344bbc4d | 406 | |
6e95dea7 SR |
407 | ret = copy_to_user(u64_to_uptr(a->rom), |
408 | client->device->config_rom, min(want, have)); | |
344bbc4d | 409 | } |
6e95dea7 | 410 | a->rom_length = client->device->config_rom_length * 4; |
344bbc4d | 411 | |
c9755e14 SR |
412 | up_read(&fw_device_rwsem); |
413 | ||
414 | if (ret != 0) | |
415 | return -EFAULT; | |
416 | ||
6e95dea7 SR |
417 | client->bus_reset_closure = a->bus_reset_closure; |
418 | if (a->bus_reset != 0) { | |
da8ecffa | 419 | fill_bus_reset_event(&bus_reset, client); |
6e95dea7 SR |
420 | if (copy_to_user(u64_to_uptr(a->bus_reset), |
421 | &bus_reset, sizeof(bus_reset))) | |
344bbc4d KH |
422 | return -EFAULT; |
423 | } | |
19a15b93 | 424 | |
19a15b93 KH |
425 | return 0; |
426 | } | |
427 | ||
53dca511 SR |
428 | static int add_client_resource(struct client *client, |
429 | struct client_resource *resource, gfp_t gfp_mask) | |
3964a449 KH |
430 | { |
431 | unsigned long flags; | |
45ee3199 JF |
432 | int ret; |
433 | ||
434 | retry: | |
435 | if (idr_pre_get(&client->resource_idr, gfp_mask) == 0) | |
436 | return -ENOMEM; | |
3964a449 KH |
437 | |
438 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
439 | if (client->in_shutdown) |
440 | ret = -ECANCELED; | |
441 | else | |
442 | ret = idr_get_new(&client->resource_idr, resource, | |
443 | &resource->handle); | |
b1bda4cd | 444 | if (ret >= 0) { |
fb443036 | 445 | client_get(client); |
9fb551bf | 446 | schedule_if_iso_resource(resource); |
b1bda4cd | 447 | } |
3964a449 | 448 | spin_unlock_irqrestore(&client->lock, flags); |
45ee3199 JF |
449 | |
450 | if (ret == -EAGAIN) | |
451 | goto retry; | |
452 | ||
453 | return ret < 0 ? ret : 0; | |
3964a449 KH |
454 | } |
455 | ||
53dca511 SR |
456 | static int release_client_resource(struct client *client, u32 handle, |
457 | client_resource_release_fn_t release, | |
e21fcf79 | 458 | struct client_resource **return_resource) |
3964a449 | 459 | { |
e21fcf79 | 460 | struct client_resource *resource; |
3964a449 | 461 | |
3ba94986 | 462 | spin_lock_irq(&client->lock); |
45ee3199 | 463 | if (client->in_shutdown) |
e21fcf79 | 464 | resource = NULL; |
45ee3199 | 465 | else |
e21fcf79 SR |
466 | resource = idr_find(&client->resource_idr, handle); |
467 | if (resource && resource->release == release) | |
45ee3199 | 468 | idr_remove(&client->resource_idr, handle); |
3ba94986 | 469 | spin_unlock_irq(&client->lock); |
3964a449 | 470 | |
e21fcf79 | 471 | if (!(resource && resource->release == release)) |
3964a449 KH |
472 | return -EINVAL; |
473 | ||
e21fcf79 SR |
474 | if (return_resource) |
475 | *return_resource = resource; | |
3964a449 | 476 | else |
e21fcf79 | 477 | resource->release(client, resource); |
3964a449 | 478 | |
fb443036 SR |
479 | client_put(client); |
480 | ||
3964a449 KH |
481 | return 0; |
482 | } | |
483 | ||
53dca511 SR |
484 | static void release_transaction(struct client *client, |
485 | struct client_resource *resource) | |
3964a449 | 486 | { |
97c18b7f SR |
487 | struct outbound_transaction_resource *r = container_of(resource, |
488 | struct outbound_transaction_resource, resource); | |
3964a449 | 489 | |
97c18b7f | 490 | fw_cancel_transaction(client->device->card, &r->transaction); |
3964a449 KH |
491 | } |
492 | ||
53dca511 SR |
493 | static void complete_transaction(struct fw_card *card, int rcode, |
494 | void *payload, size_t length, void *data) | |
19a15b93 | 495 | { |
97c18b7f SR |
496 | struct outbound_transaction_event *e = data; |
497 | struct fw_cdev_event_response *rsp = &e->response; | |
498 | struct client *client = e->client; | |
28cf6a04 | 499 | unsigned long flags; |
19a15b93 | 500 | |
97c18b7f SR |
501 | if (length < rsp->length) |
502 | rsp->length = length; | |
19a15b93 | 503 | if (rcode == RCODE_COMPLETE) |
97c18b7f | 504 | memcpy(rsp->data, payload, rsp->length); |
19a15b93 | 505 | |
28cf6a04 | 506 | spin_lock_irqsave(&client->lock, flags); |
45ee3199 | 507 | /* |
fb443036 SR |
508 | * 1. If called while in shutdown, the idr tree must be left untouched. |
509 | * The idr handle will be removed and the client reference will be | |
510 | * dropped later. | |
511 | * 2. If the call chain was release_client_resource -> | |
512 | * release_transaction -> complete_transaction (instead of a normal | |
513 | * conclusion of the transaction), i.e. if this resource was already | |
514 | * unregistered from the idr, the client reference will be dropped | |
515 | * by release_client_resource and we must not drop it here. | |
45ee3199 | 516 | */ |
fb443036 | 517 | if (!client->in_shutdown && |
97c18b7f SR |
518 | idr_find(&client->resource_idr, e->r.resource.handle)) { |
519 | idr_remove(&client->resource_idr, e->r.resource.handle); | |
fb443036 SR |
520 | /* Drop the idr's reference */ |
521 | client_put(client); | |
522 | } | |
28cf6a04 KH |
523 | spin_unlock_irqrestore(&client->lock, flags); |
524 | ||
97c18b7f SR |
525 | rsp->type = FW_CDEV_EVENT_RESPONSE; |
526 | rsp->rcode = rcode; | |
8401d92b DM |
527 | |
528 | /* | |
97c18b7f | 529 | * In the case that sizeof(*rsp) doesn't align with the position of the |
8401d92b DM |
530 | * data, and the read is short, preserve an extra copy of the data |
531 | * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless | |
532 | * for short reads and some apps depended on it, this is both safe | |
533 | * and prudent for compatibility. | |
534 | */ | |
97c18b7f SR |
535 | if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data)) |
536 | queue_event(client, &e->event, rsp, sizeof(*rsp), | |
537 | rsp->data, rsp->length); | |
8401d92b | 538 | else |
97c18b7f | 539 | queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length, |
8401d92b | 540 | NULL, 0); |
fb443036 SR |
541 | |
542 | /* Drop the transaction callback's reference */ | |
543 | client_put(client); | |
19a15b93 KH |
544 | } |
545 | ||
acfe8333 JFSR |
546 | static int init_request(struct client *client, |
547 | struct fw_cdev_send_request *request, | |
548 | int destination_id, int speed) | |
19a15b93 | 549 | { |
97c18b7f | 550 | struct outbound_transaction_event *e; |
1f3125af | 551 | int ret; |
19a15b93 | 552 | |
18e9b10f SR |
553 | if (request->tcode != TCODE_STREAM_DATA && |
554 | (request->length > 4096 || request->length > 512 << speed)) | |
5d3fd692 | 555 | return -EIO; |
19a15b93 | 556 | |
97c18b7f SR |
557 | e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL); |
558 | if (e == NULL) | |
19a15b93 KH |
559 | return -ENOMEM; |
560 | ||
97c18b7f SR |
561 | e->client = client; |
562 | e->response.length = request->length; | |
563 | e->response.closure = request->closure; | |
19a15b93 | 564 | |
4f259223 | 565 | if (request->data && |
97c18b7f | 566 | copy_from_user(e->response.data, |
4f259223 | 567 | u64_to_uptr(request->data), request->length)) { |
1f3125af | 568 | ret = -EFAULT; |
45ee3199 | 569 | goto failed; |
1f3125af SR |
570 | } |
571 | ||
97c18b7f SR |
572 | e->r.resource.release = release_transaction; |
573 | ret = add_client_resource(client, &e->r.resource, GFP_KERNEL); | |
45ee3199 JF |
574 | if (ret < 0) |
575 | goto failed; | |
28cf6a04 | 576 | |
fb443036 SR |
577 | /* Get a reference for the transaction callback */ |
578 | client_get(client); | |
579 | ||
acfe8333 | 580 | fw_send_request(client->device->card, &e->r.transaction, |
664d8010 SR |
581 | request->tcode, destination_id, request->generation, |
582 | speed, request->offset, e->response.data, | |
583 | request->length, complete_transaction, e); | |
584 | return 0; | |
19a15b93 | 585 | |
45ee3199 | 586 | failed: |
97c18b7f | 587 | kfree(e); |
1f3125af SR |
588 | |
589 | return ret; | |
19a15b93 KH |
590 | } |
591 | ||
6e95dea7 | 592 | static int ioctl_send_request(struct client *client, union ioctl_arg *arg) |
acfe8333 | 593 | { |
6e95dea7 | 594 | switch (arg->send_request.tcode) { |
acfe8333 JFSR |
595 | case TCODE_WRITE_QUADLET_REQUEST: |
596 | case TCODE_WRITE_BLOCK_REQUEST: | |
597 | case TCODE_READ_QUADLET_REQUEST: | |
598 | case TCODE_READ_BLOCK_REQUEST: | |
599 | case TCODE_LOCK_MASK_SWAP: | |
600 | case TCODE_LOCK_COMPARE_SWAP: | |
601 | case TCODE_LOCK_FETCH_ADD: | |
602 | case TCODE_LOCK_LITTLE_ADD: | |
603 | case TCODE_LOCK_BOUNDED_ADD: | |
604 | case TCODE_LOCK_WRAP_ADD: | |
605 | case TCODE_LOCK_VENDOR_DEPENDENT: | |
606 | break; | |
607 | default: | |
608 | return -EINVAL; | |
609 | } | |
610 | ||
6e95dea7 | 611 | return init_request(client, &arg->send_request, client->device->node_id, |
acfe8333 JFSR |
612 | client->device->max_speed); |
613 | } | |
614 | ||
281e2032 SR |
615 | static inline bool is_fcp_request(struct fw_request *request) |
616 | { | |
617 | return request == NULL; | |
618 | } | |
619 | ||
53dca511 SR |
620 | static void release_request(struct client *client, |
621 | struct client_resource *resource) | |
3964a449 | 622 | { |
97c18b7f SR |
623 | struct inbound_transaction_resource *r = container_of(resource, |
624 | struct inbound_transaction_resource, resource); | |
3964a449 | 625 | |
281e2032 SR |
626 | if (is_fcp_request(r->request)) |
627 | kfree(r->data); | |
628 | else | |
db5d247a CL |
629 | fw_send_response(client->device->card, r->request, |
630 | RCODE_CONFLICT_ERROR); | |
97c18b7f | 631 | kfree(r); |
3964a449 KH |
632 | } |
633 | ||
97c18b7f | 634 | static void handle_request(struct fw_card *card, struct fw_request *request, |
53dca511 SR |
635 | int tcode, int destination, int source, |
636 | int generation, int speed, | |
637 | unsigned long long offset, | |
638 | void *payload, size_t length, void *callback_data) | |
19a15b93 | 639 | { |
97c18b7f SR |
640 | struct address_handler_resource *handler = callback_data; |
641 | struct inbound_transaction_resource *r; | |
642 | struct inbound_transaction_event *e; | |
281e2032 | 643 | void *fcp_frame = NULL; |
45ee3199 | 644 | int ret; |
19a15b93 | 645 | |
97c18b7f | 646 | r = kmalloc(sizeof(*r), GFP_ATOMIC); |
2d826cc5 | 647 | e = kmalloc(sizeof(*e), GFP_ATOMIC); |
97c18b7f | 648 | if (r == NULL || e == NULL) |
45ee3199 | 649 | goto failed; |
19a15b93 | 650 | |
97c18b7f SR |
651 | r->request = request; |
652 | r->data = payload; | |
653 | r->length = length; | |
19a15b93 | 654 | |
281e2032 SR |
655 | if (is_fcp_request(request)) { |
656 | /* | |
657 | * FIXME: Let core-transaction.c manage a | |
658 | * single reference-counted copy? | |
659 | */ | |
660 | fcp_frame = kmemdup(payload, length, GFP_ATOMIC); | |
661 | if (fcp_frame == NULL) | |
662 | goto failed; | |
663 | ||
664 | r->data = fcp_frame; | |
665 | } | |
666 | ||
97c18b7f SR |
667 | r->resource.release = release_request; |
668 | ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC); | |
45ee3199 JF |
669 | if (ret < 0) |
670 | goto failed; | |
19a15b93 KH |
671 | |
672 | e->request.type = FW_CDEV_EVENT_REQUEST; | |
673 | e->request.tcode = tcode; | |
674 | e->request.offset = offset; | |
675 | e->request.length = length; | |
97c18b7f | 676 | e->request.handle = r->resource.handle; |
19a15b93 KH |
677 | e->request.closure = handler->closure; |
678 | ||
97c18b7f | 679 | queue_event(handler->client, &e->event, |
281e2032 | 680 | &e->request, sizeof(e->request), r->data, length); |
45ee3199 JF |
681 | return; |
682 | ||
683 | failed: | |
97c18b7f | 684 | kfree(r); |
45ee3199 | 685 | kfree(e); |
281e2032 SR |
686 | kfree(fcp_frame); |
687 | ||
688 | if (!is_fcp_request(request)) | |
db5d247a | 689 | fw_send_response(card, request, RCODE_CONFLICT_ERROR); |
19a15b93 KH |
690 | } |
691 | ||
53dca511 SR |
692 | static void release_address_handler(struct client *client, |
693 | struct client_resource *resource) | |
3964a449 | 694 | { |
97c18b7f SR |
695 | struct address_handler_resource *r = |
696 | container_of(resource, struct address_handler_resource, resource); | |
3964a449 | 697 | |
97c18b7f SR |
698 | fw_core_remove_address_handler(&r->handler); |
699 | kfree(r); | |
3964a449 KH |
700 | } |
701 | ||
6e95dea7 | 702 | static int ioctl_allocate(struct client *client, union ioctl_arg *arg) |
19a15b93 | 703 | { |
6e95dea7 | 704 | struct fw_cdev_allocate *a = &arg->allocate; |
97c18b7f | 705 | struct address_handler_resource *r; |
19a15b93 | 706 | struct fw_address_region region; |
45ee3199 | 707 | int ret; |
19a15b93 | 708 | |
97c18b7f SR |
709 | r = kmalloc(sizeof(*r), GFP_KERNEL); |
710 | if (r == NULL) | |
19a15b93 KH |
711 | return -ENOMEM; |
712 | ||
6e95dea7 SR |
713 | region.start = a->offset; |
714 | region.end = a->offset + a->length; | |
715 | r->handler.length = a->length; | |
97c18b7f | 716 | r->handler.address_callback = handle_request; |
6e95dea7 SR |
717 | r->handler.callback_data = r; |
718 | r->closure = a->closure; | |
719 | r->client = client; | |
19a15b93 | 720 | |
97c18b7f | 721 | ret = fw_core_add_address_handler(&r->handler, ®ion); |
3e0b5f0d | 722 | if (ret < 0) { |
97c18b7f | 723 | kfree(r); |
3e0b5f0d | 724 | return ret; |
19a15b93 KH |
725 | } |
726 | ||
97c18b7f SR |
727 | r->resource.release = release_address_handler; |
728 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 729 | if (ret < 0) { |
97c18b7f | 730 | release_address_handler(client, &r->resource); |
45ee3199 JF |
731 | return ret; |
732 | } | |
6e95dea7 | 733 | a->handle = r->resource.handle; |
19a15b93 KH |
734 | |
735 | return 0; | |
736 | } | |
737 | ||
6e95dea7 | 738 | static int ioctl_deallocate(struct client *client, union ioctl_arg *arg) |
9472316b | 739 | { |
6e95dea7 | 740 | return release_client_resource(client, arg->deallocate.handle, |
45ee3199 | 741 | release_address_handler, NULL); |
9472316b KH |
742 | } |
743 | ||
6e95dea7 | 744 | static int ioctl_send_response(struct client *client, union ioctl_arg *arg) |
19a15b93 | 745 | { |
6e95dea7 | 746 | struct fw_cdev_send_response *a = &arg->send_response; |
3964a449 | 747 | struct client_resource *resource; |
97c18b7f | 748 | struct inbound_transaction_resource *r; |
7e44c0b5 | 749 | int ret = 0; |
19a15b93 | 750 | |
6e95dea7 | 751 | if (release_client_resource(client, a->handle, |
45ee3199 | 752 | release_request, &resource) < 0) |
19a15b93 | 753 | return -EINVAL; |
45ee3199 | 754 | |
97c18b7f SR |
755 | r = container_of(resource, struct inbound_transaction_resource, |
756 | resource); | |
281e2032 SR |
757 | if (is_fcp_request(r->request)) |
758 | goto out; | |
759 | ||
6e95dea7 SR |
760 | if (a->length < r->length) |
761 | r->length = a->length; | |
762 | if (copy_from_user(r->data, u64_to_uptr(a->data), r->length)) { | |
281e2032 SR |
763 | ret = -EFAULT; |
764 | kfree(r->request); | |
765 | goto out; | |
7e44c0b5 | 766 | } |
6e95dea7 | 767 | fw_send_response(client->device->card, r->request, a->rcode); |
7e44c0b5 | 768 | out: |
19a15b93 KH |
769 | kfree(r); |
770 | ||
7e44c0b5 | 771 | return ret; |
19a15b93 KH |
772 | } |
773 | ||
6e95dea7 | 774 | static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg) |
5371842b | 775 | { |
6e95dea7 SR |
776 | return fw_core_initiate_bus_reset(client->device->card, |
777 | arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET); | |
5371842b KH |
778 | } |
779 | ||
3964a449 KH |
780 | static void release_descriptor(struct client *client, |
781 | struct client_resource *resource) | |
782 | { | |
97c18b7f SR |
783 | struct descriptor_resource *r = |
784 | container_of(resource, struct descriptor_resource, resource); | |
3964a449 | 785 | |
97c18b7f SR |
786 | fw_core_remove_descriptor(&r->descriptor); |
787 | kfree(r); | |
3964a449 KH |
788 | } |
789 | ||
6e95dea7 | 790 | static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 791 | { |
6e95dea7 | 792 | struct fw_cdev_add_descriptor *a = &arg->add_descriptor; |
97c18b7f | 793 | struct descriptor_resource *r; |
45ee3199 | 794 | int ret; |
66dea3e5 | 795 | |
de487da8 | 796 | /* Access policy: Allow this ioctl only on local nodes' device files. */ |
92368890 | 797 | if (!client->device->is_local) |
de487da8 SR |
798 | return -ENOSYS; |
799 | ||
6e95dea7 | 800 | if (a->length > 256) |
66dea3e5 KH |
801 | return -EINVAL; |
802 | ||
6e95dea7 | 803 | r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL); |
97c18b7f | 804 | if (r == NULL) |
66dea3e5 KH |
805 | return -ENOMEM; |
806 | ||
6e95dea7 | 807 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) { |
45ee3199 JF |
808 | ret = -EFAULT; |
809 | goto failed; | |
66dea3e5 KH |
810 | } |
811 | ||
6e95dea7 SR |
812 | r->descriptor.length = a->length; |
813 | r->descriptor.immediate = a->immediate; | |
814 | r->descriptor.key = a->key; | |
97c18b7f | 815 | r->descriptor.data = r->data; |
66dea3e5 | 816 | |
97c18b7f | 817 | ret = fw_core_add_descriptor(&r->descriptor); |
45ee3199 JF |
818 | if (ret < 0) |
819 | goto failed; | |
66dea3e5 | 820 | |
97c18b7f SR |
821 | r->resource.release = release_descriptor; |
822 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 823 | if (ret < 0) { |
97c18b7f | 824 | fw_core_remove_descriptor(&r->descriptor); |
45ee3199 JF |
825 | goto failed; |
826 | } | |
6e95dea7 | 827 | a->handle = r->resource.handle; |
66dea3e5 KH |
828 | |
829 | return 0; | |
45ee3199 | 830 | failed: |
97c18b7f | 831 | kfree(r); |
45ee3199 JF |
832 | |
833 | return ret; | |
66dea3e5 KH |
834 | } |
835 | ||
6e95dea7 | 836 | static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 837 | { |
6e95dea7 | 838 | return release_client_resource(client, arg->remove_descriptor.handle, |
45ee3199 | 839 | release_descriptor, NULL); |
66dea3e5 KH |
840 | } |
841 | ||
53dca511 SR |
842 | static void iso_callback(struct fw_iso_context *context, u32 cycle, |
843 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
844 | { |
845 | struct client *client = data; | |
97c18b7f | 846 | struct iso_interrupt_event *e; |
19a15b93 | 847 | |
97c18b7f SR |
848 | e = kzalloc(sizeof(*e) + header_length, GFP_ATOMIC); |
849 | if (e == NULL) | |
19a15b93 KH |
850 | return; |
851 | ||
97c18b7f SR |
852 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
853 | e->interrupt.closure = client->iso_closure; | |
854 | e->interrupt.cycle = cycle; | |
855 | e->interrupt.header_length = header_length; | |
856 | memcpy(e->interrupt.header, header, header_length); | |
857 | queue_event(client, &e->event, &e->interrupt, | |
858 | sizeof(e->interrupt) + header_length, NULL, 0); | |
19a15b93 KH |
859 | } |
860 | ||
6e95dea7 | 861 | static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) |
19a15b93 | 862 | { |
6e95dea7 | 863 | struct fw_cdev_create_iso_context *a = &arg->create_iso_context; |
24315c5e | 864 | struct fw_iso_context *context; |
19a15b93 | 865 | |
fae60312 SR |
866 | /* We only support one context at this time. */ |
867 | if (client->iso_context != NULL) | |
868 | return -EBUSY; | |
869 | ||
6e95dea7 | 870 | if (a->channel > 63) |
21efb3cf KH |
871 | return -EINVAL; |
872 | ||
6e95dea7 | 873 | switch (a->type) { |
c70dc788 | 874 | case FW_ISO_CONTEXT_RECEIVE: |
6e95dea7 | 875 | if (a->header_size < 4 || (a->header_size & 3)) |
c70dc788 | 876 | return -EINVAL; |
c70dc788 KH |
877 | break; |
878 | ||
879 | case FW_ISO_CONTEXT_TRANSMIT: | |
6e95dea7 | 880 | if (a->speed > SCODE_3200) |
c70dc788 | 881 | return -EINVAL; |
c70dc788 KH |
882 | break; |
883 | ||
884 | default: | |
21efb3cf | 885 | return -EINVAL; |
c70dc788 KH |
886 | } |
887 | ||
6e95dea7 SR |
888 | context = fw_iso_context_create(client->device->card, a->type, |
889 | a->channel, a->speed, a->header_size, | |
890 | iso_callback, client); | |
24315c5e KH |
891 | if (IS_ERR(context)) |
892 | return PTR_ERR(context); | |
893 | ||
6e95dea7 | 894 | client->iso_closure = a->closure; |
24315c5e | 895 | client->iso_context = context; |
19a15b93 | 896 | |
abaa5743 | 897 | /* We only support one context at this time. */ |
6e95dea7 | 898 | a->handle = 0; |
abaa5743 | 899 | |
19a15b93 KH |
900 | return 0; |
901 | } | |
902 | ||
1ca31ae7 KH |
903 | /* Macros for decoding the iso packet control header. */ |
904 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) | |
905 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) | |
906 | #define GET_SKIP(v) (((v) >> 17) & 0x01) | |
7a100344 SR |
907 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
908 | #define GET_SY(v) (((v) >> 20) & 0x0f) | |
1ca31ae7 KH |
909 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
910 | ||
6e95dea7 | 911 | static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 912 | { |
6e95dea7 | 913 | struct fw_cdev_queue_iso *a = &arg->queue_iso; |
19a15b93 | 914 | struct fw_cdev_iso_packet __user *p, *end, *next; |
9b32d5f3 | 915 | struct fw_iso_context *ctx = client->iso_context; |
ef370ee7 | 916 | unsigned long payload, buffer_end, header_length; |
1ca31ae7 | 917 | u32 control; |
19a15b93 KH |
918 | int count; |
919 | struct { | |
920 | struct fw_iso_packet packet; | |
921 | u8 header[256]; | |
922 | } u; | |
923 | ||
6e95dea7 | 924 | if (ctx == NULL || a->handle != 0) |
19a15b93 | 925 | return -EINVAL; |
19a15b93 | 926 | |
c781c06d KH |
927 | /* |
928 | * If the user passes a non-NULL data pointer, has mmap()'ed | |
19a15b93 KH |
929 | * the iso buffer, and the pointer points inside the buffer, |
930 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 931 | * set them both to 0, which will still let packets with |
19a15b93 KH |
932 | * payload_length == 0 through. In other words, if no packets |
933 | * use the indirect payload, the iso buffer need not be mapped | |
6e95dea7 | 934 | * and the a->data pointer is ignored. |
c781c06d | 935 | */ |
19a15b93 | 936 | |
6e95dea7 | 937 | payload = (unsigned long)a->data - client->vm_start; |
ef370ee7 | 938 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
6e95dea7 | 939 | if (a->data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 940 | payload >= buffer_end) { |
9aad8125 | 941 | payload = 0; |
ef370ee7 | 942 | buffer_end = 0; |
19a15b93 KH |
943 | } |
944 | ||
6e95dea7 | 945 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets); |
1ccc9147 | 946 | |
6e95dea7 | 947 | if (!access_ok(VERIFY_READ, p, a->size)) |
19a15b93 KH |
948 | return -EFAULT; |
949 | ||
6e95dea7 | 950 | end = (void __user *)p + a->size; |
19a15b93 KH |
951 | count = 0; |
952 | while (p < end) { | |
1ca31ae7 | 953 | if (get_user(control, &p->control)) |
19a15b93 | 954 | return -EFAULT; |
1ca31ae7 KH |
955 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
956 | u.packet.interrupt = GET_INTERRUPT(control); | |
957 | u.packet.skip = GET_SKIP(control); | |
958 | u.packet.tag = GET_TAG(control); | |
959 | u.packet.sy = GET_SY(control); | |
960 | u.packet.header_length = GET_HEADER_LENGTH(control); | |
295e3feb | 961 | |
9b32d5f3 | 962 | if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) { |
385ab5bc CL |
963 | if (u.packet.header_length % 4 != 0) |
964 | return -EINVAL; | |
295e3feb KH |
965 | header_length = u.packet.header_length; |
966 | } else { | |
c781c06d KH |
967 | /* |
968 | * We require that header_length is a multiple of | |
969 | * the fixed header size, ctx->header_size. | |
970 | */ | |
9b32d5f3 KH |
971 | if (ctx->header_size == 0) { |
972 | if (u.packet.header_length > 0) | |
973 | return -EINVAL; | |
4ba1d9c0 CL |
974 | } else if (u.packet.header_length == 0 || |
975 | u.packet.header_length % ctx->header_size != 0) { | |
295e3feb | 976 | return -EINVAL; |
9b32d5f3 | 977 | } |
295e3feb KH |
978 | header_length = 0; |
979 | } | |
980 | ||
19a15b93 | 981 | next = (struct fw_cdev_iso_packet __user *) |
295e3feb | 982 | &p->header[header_length / 4]; |
19a15b93 KH |
983 | if (next > end) |
984 | return -EINVAL; | |
985 | if (__copy_from_user | |
295e3feb | 986 | (u.packet.header, p->header, header_length)) |
19a15b93 | 987 | return -EFAULT; |
98b6cbe8 | 988 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
989 | u.packet.header_length + u.packet.payload_length > 0) |
990 | return -EINVAL; | |
ef370ee7 | 991 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
992 | return -EINVAL; |
993 | ||
9b32d5f3 KH |
994 | if (fw_iso_context_queue(ctx, &u.packet, |
995 | &client->buffer, payload)) | |
19a15b93 KH |
996 | break; |
997 | ||
998 | p = next; | |
999 | payload += u.packet.payload_length; | |
1000 | count++; | |
1001 | } | |
1002 | ||
6e95dea7 SR |
1003 | a->size -= uptr_to_u64(p) - a->packets; |
1004 | a->packets = uptr_to_u64(p); | |
1005 | a->data = client->vm_start + payload; | |
19a15b93 KH |
1006 | |
1007 | return count; | |
1008 | } | |
1009 | ||
6e95dea7 | 1010 | static int ioctl_start_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1011 | { |
6e95dea7 | 1012 | struct fw_cdev_start_iso *a = &arg->start_iso; |
19a15b93 | 1013 | |
6e95dea7 | 1014 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 | 1015 | return -EINVAL; |
fae60312 | 1016 | |
6e95dea7 SR |
1017 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE && |
1018 | (a->tags == 0 || a->tags > 15 || a->sync > 15)) | |
1019 | return -EINVAL; | |
eb0306ea | 1020 | |
6e95dea7 SR |
1021 | return fw_iso_context_start(client->iso_context, |
1022 | a->cycle, a->sync, a->tags); | |
19a15b93 KH |
1023 | } |
1024 | ||
6e95dea7 | 1025 | static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg) |
b8295668 | 1026 | { |
6e95dea7 | 1027 | struct fw_cdev_stop_iso *a = &arg->stop_iso; |
abaa5743 | 1028 | |
6e95dea7 | 1029 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 KH |
1030 | return -EINVAL; |
1031 | ||
b8295668 KH |
1032 | return fw_iso_context_stop(client->iso_context); |
1033 | } | |
1034 | ||
6e95dea7 | 1035 | static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg) |
a64408b9 | 1036 | { |
6e95dea7 | 1037 | struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2; |
a64408b9 | 1038 | struct fw_card *card = client->device->card; |
abfe5a01 | 1039 | struct timespec ts = {0, 0}; |
4a9bde9b | 1040 | u32 cycle_time; |
abfe5a01 | 1041 | int ret = 0; |
a64408b9 | 1042 | |
4a9bde9b | 1043 | local_irq_disable(); |
a64408b9 | 1044 | |
168cf9af | 1045 | cycle_time = card->driver->get_cycle_time(card); |
abfe5a01 | 1046 | |
6e95dea7 | 1047 | switch (a->clk_id) { |
abfe5a01 SR |
1048 | case CLOCK_REALTIME: getnstimeofday(&ts); break; |
1049 | case CLOCK_MONOTONIC: do_posix_clock_monotonic_gettime(&ts); break; | |
1050 | case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts); break; | |
1051 | default: | |
1052 | ret = -EINVAL; | |
1053 | } | |
a64408b9 | 1054 | |
4a9bde9b | 1055 | local_irq_enable(); |
a64408b9 | 1056 | |
6e95dea7 SR |
1057 | a->tv_sec = ts.tv_sec; |
1058 | a->tv_nsec = ts.tv_nsec; | |
1059 | a->cycle_timer = cycle_time; | |
abfe5a01 SR |
1060 | |
1061 | return ret; | |
1062 | } | |
1063 | ||
6e95dea7 | 1064 | static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg) |
abfe5a01 | 1065 | { |
6e95dea7 | 1066 | struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer; |
abfe5a01 SR |
1067 | struct fw_cdev_get_cycle_timer2 ct2; |
1068 | ||
1069 | ct2.clk_id = CLOCK_REALTIME; | |
6e95dea7 | 1070 | ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2); |
abfe5a01 | 1071 | |
6e95dea7 SR |
1072 | a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC; |
1073 | a->cycle_timer = ct2.cycle_timer; | |
4a9bde9b | 1074 | |
a64408b9 SR |
1075 | return 0; |
1076 | } | |
1077 | ||
b1bda4cd JFSR |
1078 | static void iso_resource_work(struct work_struct *work) |
1079 | { | |
1080 | struct iso_resource_event *e; | |
1081 | struct iso_resource *r = | |
1082 | container_of(work, struct iso_resource, work.work); | |
1083 | struct client *client = r->client; | |
1084 | int generation, channel, bandwidth, todo; | |
1085 | bool skip, free, success; | |
1086 | ||
1087 | spin_lock_irq(&client->lock); | |
1088 | generation = client->device->generation; | |
1089 | todo = r->todo; | |
1090 | /* Allow 1000ms grace period for other reallocations. */ | |
1091 | if (todo == ISO_RES_ALLOC && | |
1092 | time_is_after_jiffies(client->device->card->reset_jiffies + HZ)) { | |
9fb551bf | 1093 | schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3)); |
b1bda4cd JFSR |
1094 | skip = true; |
1095 | } else { | |
1096 | /* We could be called twice within the same generation. */ | |
1097 | skip = todo == ISO_RES_REALLOC && | |
1098 | r->generation == generation; | |
1099 | } | |
1ec3c026 SR |
1100 | free = todo == ISO_RES_DEALLOC || |
1101 | todo == ISO_RES_ALLOC_ONCE || | |
1102 | todo == ISO_RES_DEALLOC_ONCE; | |
b1bda4cd JFSR |
1103 | r->generation = generation; |
1104 | spin_unlock_irq(&client->lock); | |
1105 | ||
1106 | if (skip) | |
1107 | goto out; | |
1108 | ||
1109 | bandwidth = r->bandwidth; | |
1110 | ||
1111 | fw_iso_resource_manage(client->device->card, generation, | |
1112 | r->channels, &channel, &bandwidth, | |
1ec3c026 SR |
1113 | todo == ISO_RES_ALLOC || |
1114 | todo == ISO_RES_REALLOC || | |
6fdc0370 SR |
1115 | todo == ISO_RES_ALLOC_ONCE, |
1116 | r->transaction_data); | |
b1bda4cd JFSR |
1117 | /* |
1118 | * Is this generation outdated already? As long as this resource sticks | |
1119 | * in the idr, it will be scheduled again for a newer generation or at | |
1120 | * shutdown. | |
1121 | */ | |
1122 | if (channel == -EAGAIN && | |
1123 | (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC)) | |
1124 | goto out; | |
1125 | ||
1126 | success = channel >= 0 || bandwidth > 0; | |
1127 | ||
1128 | spin_lock_irq(&client->lock); | |
1129 | /* | |
1130 | * Transit from allocation to reallocation, except if the client | |
1131 | * requested deallocation in the meantime. | |
1132 | */ | |
1133 | if (r->todo == ISO_RES_ALLOC) | |
1134 | r->todo = ISO_RES_REALLOC; | |
1135 | /* | |
1136 | * Allocation or reallocation failure? Pull this resource out of the | |
1137 | * idr and prepare for deletion, unless the client is shutting down. | |
1138 | */ | |
1139 | if (r->todo == ISO_RES_REALLOC && !success && | |
1140 | !client->in_shutdown && | |
1141 | idr_find(&client->resource_idr, r->resource.handle)) { | |
1142 | idr_remove(&client->resource_idr, r->resource.handle); | |
1143 | client_put(client); | |
1144 | free = true; | |
1145 | } | |
1146 | spin_unlock_irq(&client->lock); | |
1147 | ||
1148 | if (todo == ISO_RES_ALLOC && channel >= 0) | |
5d9cb7d2 | 1149 | r->channels = 1ULL << channel; |
b1bda4cd JFSR |
1150 | |
1151 | if (todo == ISO_RES_REALLOC && success) | |
1152 | goto out; | |
1153 | ||
1ec3c026 | 1154 | if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) { |
b1bda4cd JFSR |
1155 | e = r->e_alloc; |
1156 | r->e_alloc = NULL; | |
1157 | } else { | |
1158 | e = r->e_dealloc; | |
1159 | r->e_dealloc = NULL; | |
1160 | } | |
e21fcf79 SR |
1161 | e->iso_resource.handle = r->resource.handle; |
1162 | e->iso_resource.channel = channel; | |
1163 | e->iso_resource.bandwidth = bandwidth; | |
b1bda4cd JFSR |
1164 | |
1165 | queue_event(client, &e->event, | |
e21fcf79 | 1166 | &e->iso_resource, sizeof(e->iso_resource), NULL, 0); |
b1bda4cd JFSR |
1167 | |
1168 | if (free) { | |
1169 | cancel_delayed_work(&r->work); | |
1170 | kfree(r->e_alloc); | |
1171 | kfree(r->e_dealloc); | |
1172 | kfree(r); | |
1173 | } | |
1174 | out: | |
1175 | client_put(client); | |
1176 | } | |
1177 | ||
b1bda4cd JFSR |
1178 | static void release_iso_resource(struct client *client, |
1179 | struct client_resource *resource) | |
1180 | { | |
1181 | struct iso_resource *r = | |
1182 | container_of(resource, struct iso_resource, resource); | |
1183 | ||
1184 | spin_lock_irq(&client->lock); | |
1185 | r->todo = ISO_RES_DEALLOC; | |
9fb551bf | 1186 | schedule_iso_resource(r, 0); |
b1bda4cd JFSR |
1187 | spin_unlock_irq(&client->lock); |
1188 | } | |
1189 | ||
1ec3c026 SR |
1190 | static int init_iso_resource(struct client *client, |
1191 | struct fw_cdev_allocate_iso_resource *request, int todo) | |
b1bda4cd | 1192 | { |
b1bda4cd JFSR |
1193 | struct iso_resource_event *e1, *e2; |
1194 | struct iso_resource *r; | |
1195 | int ret; | |
1196 | ||
1197 | if ((request->channels == 0 && request->bandwidth == 0) || | |
1198 | request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL || | |
1199 | request->bandwidth < 0) | |
1200 | return -EINVAL; | |
1201 | ||
1202 | r = kmalloc(sizeof(*r), GFP_KERNEL); | |
1203 | e1 = kmalloc(sizeof(*e1), GFP_KERNEL); | |
1204 | e2 = kmalloc(sizeof(*e2), GFP_KERNEL); | |
1205 | if (r == NULL || e1 == NULL || e2 == NULL) { | |
1206 | ret = -ENOMEM; | |
1207 | goto fail; | |
1208 | } | |
1209 | ||
1210 | INIT_DELAYED_WORK(&r->work, iso_resource_work); | |
1211 | r->client = client; | |
1ec3c026 | 1212 | r->todo = todo; |
b1bda4cd JFSR |
1213 | r->generation = -1; |
1214 | r->channels = request->channels; | |
1215 | r->bandwidth = request->bandwidth; | |
1216 | r->e_alloc = e1; | |
1217 | r->e_dealloc = e2; | |
1218 | ||
e21fcf79 SR |
1219 | e1->iso_resource.closure = request->closure; |
1220 | e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED; | |
1221 | e2->iso_resource.closure = request->closure; | |
1222 | e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED; | |
b1bda4cd | 1223 | |
1ec3c026 SR |
1224 | if (todo == ISO_RES_ALLOC) { |
1225 | r->resource.release = release_iso_resource; | |
1226 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
81610b8f SR |
1227 | if (ret < 0) |
1228 | goto fail; | |
1ec3c026 SR |
1229 | } else { |
1230 | r->resource.release = NULL; | |
1231 | r->resource.handle = -1; | |
9fb551bf | 1232 | schedule_iso_resource(r, 0); |
1ec3c026 | 1233 | } |
b1bda4cd JFSR |
1234 | request->handle = r->resource.handle; |
1235 | ||
1236 | return 0; | |
1237 | fail: | |
1238 | kfree(r); | |
1239 | kfree(e1); | |
1240 | kfree(e2); | |
1241 | ||
1242 | return ret; | |
1243 | } | |
1244 | ||
6e95dea7 SR |
1245 | static int ioctl_allocate_iso_resource(struct client *client, |
1246 | union ioctl_arg *arg) | |
1ec3c026 | 1247 | { |
6e95dea7 SR |
1248 | return init_iso_resource(client, |
1249 | &arg->allocate_iso_resource, ISO_RES_ALLOC); | |
1ec3c026 SR |
1250 | } |
1251 | ||
6e95dea7 SR |
1252 | static int ioctl_deallocate_iso_resource(struct client *client, |
1253 | union ioctl_arg *arg) | |
b1bda4cd | 1254 | { |
6e95dea7 SR |
1255 | return release_client_resource(client, |
1256 | arg->deallocate.handle, release_iso_resource, NULL); | |
b1bda4cd JFSR |
1257 | } |
1258 | ||
6e95dea7 SR |
1259 | static int ioctl_allocate_iso_resource_once(struct client *client, |
1260 | union ioctl_arg *arg) | |
1ec3c026 | 1261 | { |
6e95dea7 SR |
1262 | return init_iso_resource(client, |
1263 | &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE); | |
1ec3c026 SR |
1264 | } |
1265 | ||
6e95dea7 SR |
1266 | static int ioctl_deallocate_iso_resource_once(struct client *client, |
1267 | union ioctl_arg *arg) | |
1ec3c026 | 1268 | { |
6e95dea7 SR |
1269 | return init_iso_resource(client, |
1270 | &arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE); | |
1ec3c026 SR |
1271 | } |
1272 | ||
c8a25900 SR |
1273 | /* |
1274 | * Returns a speed code: Maximum speed to or from this device, | |
1275 | * limited by the device's link speed, the local node's link speed, | |
1276 | * and all PHY port speeds between the two links. | |
1277 | */ | |
6e95dea7 | 1278 | static int ioctl_get_speed(struct client *client, union ioctl_arg *arg) |
33580a3e | 1279 | { |
c8a25900 | 1280 | return client->device->max_speed; |
33580a3e SR |
1281 | } |
1282 | ||
6e95dea7 SR |
1283 | static int ioctl_send_broadcast_request(struct client *client, |
1284 | union ioctl_arg *arg) | |
acfe8333 | 1285 | { |
6e95dea7 | 1286 | struct fw_cdev_send_request *a = &arg->send_request; |
acfe8333 | 1287 | |
6e95dea7 | 1288 | switch (a->tcode) { |
acfe8333 JFSR |
1289 | case TCODE_WRITE_QUADLET_REQUEST: |
1290 | case TCODE_WRITE_BLOCK_REQUEST: | |
1291 | break; | |
1292 | default: | |
1293 | return -EINVAL; | |
1294 | } | |
1295 | ||
1566f3dc | 1296 | /* Security policy: Only allow accesses to Units Space. */ |
6e95dea7 | 1297 | if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END) |
1566f3dc SR |
1298 | return -EACCES; |
1299 | ||
6e95dea7 | 1300 | return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100); |
acfe8333 JFSR |
1301 | } |
1302 | ||
6e95dea7 | 1303 | static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg) |
f8c2287c | 1304 | { |
6e95dea7 | 1305 | struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet; |
18e9b10f SR |
1306 | struct fw_cdev_send_request request; |
1307 | int dest; | |
f8c2287c | 1308 | |
6e95dea7 SR |
1309 | if (a->speed > client->device->card->link_speed || |
1310 | a->length > 1024 << a->speed) | |
18e9b10f | 1311 | return -EIO; |
f8c2287c | 1312 | |
6e95dea7 | 1313 | if (a->tag > 3 || a->channel > 63 || a->sy > 15) |
18e9b10f SR |
1314 | return -EINVAL; |
1315 | ||
6e95dea7 | 1316 | dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy); |
18e9b10f | 1317 | request.tcode = TCODE_STREAM_DATA; |
6e95dea7 SR |
1318 | request.length = a->length; |
1319 | request.closure = a->closure; | |
1320 | request.data = a->data; | |
1321 | request.generation = a->generation; | |
18e9b10f | 1322 | |
6e95dea7 | 1323 | return init_request(client, &request, dest, a->speed); |
f8c2287c JF |
1324 | } |
1325 | ||
6e95dea7 | 1326 | static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = { |
4f259223 KH |
1327 | ioctl_get_info, |
1328 | ioctl_send_request, | |
1329 | ioctl_allocate, | |
1330 | ioctl_deallocate, | |
1331 | ioctl_send_response, | |
1332 | ioctl_initiate_bus_reset, | |
1333 | ioctl_add_descriptor, | |
1334 | ioctl_remove_descriptor, | |
1335 | ioctl_create_iso_context, | |
1336 | ioctl_queue_iso, | |
1337 | ioctl_start_iso, | |
1338 | ioctl_stop_iso, | |
a64408b9 | 1339 | ioctl_get_cycle_timer, |
b1bda4cd JFSR |
1340 | ioctl_allocate_iso_resource, |
1341 | ioctl_deallocate_iso_resource, | |
1ec3c026 SR |
1342 | ioctl_allocate_iso_resource_once, |
1343 | ioctl_deallocate_iso_resource_once, | |
33580a3e | 1344 | ioctl_get_speed, |
acfe8333 | 1345 | ioctl_send_broadcast_request, |
f8c2287c | 1346 | ioctl_send_stream_packet, |
abfe5a01 | 1347 | ioctl_get_cycle_timer2, |
4f259223 KH |
1348 | }; |
1349 | ||
53dca511 SR |
1350 | static int dispatch_ioctl(struct client *client, |
1351 | unsigned int cmd, void __user *arg) | |
19a15b93 | 1352 | { |
6e95dea7 | 1353 | union ioctl_arg buffer; |
2dbd7d7e | 1354 | int ret; |
4f259223 | 1355 | |
64582298 SR |
1356 | if (fw_device_is_shutdown(client->device)) |
1357 | return -ENODEV; | |
1358 | ||
4f259223 | 1359 | if (_IOC_TYPE(cmd) != '#' || |
9cac00b8 SR |
1360 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) || |
1361 | _IOC_SIZE(cmd) > sizeof(buffer)) | |
19a15b93 | 1362 | return -EINVAL; |
4f259223 | 1363 | |
9cac00b8 SR |
1364 | if (_IOC_DIR(cmd) == _IOC_READ) |
1365 | memset(&buffer, 0, _IOC_SIZE(cmd)); | |
1366 | ||
1367 | if (_IOC_DIR(cmd) & _IOC_WRITE) | |
1368 | if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd))) | |
4f259223 | 1369 | return -EFAULT; |
4f259223 | 1370 | |
6e95dea7 | 1371 | ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer); |
2dbd7d7e SR |
1372 | if (ret < 0) |
1373 | return ret; | |
4f259223 | 1374 | |
9cac00b8 SR |
1375 | if (_IOC_DIR(cmd) & _IOC_READ) |
1376 | if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd))) | |
4f259223 | 1377 | return -EFAULT; |
4f259223 | 1378 | |
2dbd7d7e | 1379 | return ret; |
19a15b93 KH |
1380 | } |
1381 | ||
53dca511 SR |
1382 | static long fw_device_op_ioctl(struct file *file, |
1383 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1384 | { |
64582298 | 1385 | return dispatch_ioctl(file->private_data, cmd, (void __user *)arg); |
19a15b93 KH |
1386 | } |
1387 | ||
1388 | #ifdef CONFIG_COMPAT | |
53dca511 SR |
1389 | static long fw_device_op_compat_ioctl(struct file *file, |
1390 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1391 | { |
64582298 | 1392 | return dispatch_ioctl(file->private_data, cmd, compat_ptr(arg)); |
19a15b93 KH |
1393 | } |
1394 | #endif | |
1395 | ||
1396 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
1397 | { | |
1398 | struct client *client = file->private_data; | |
9aad8125 KH |
1399 | enum dma_data_direction direction; |
1400 | unsigned long size; | |
2dbd7d7e | 1401 | int page_count, ret; |
9aad8125 | 1402 | |
551f4cb9 JF |
1403 | if (fw_device_is_shutdown(client->device)) |
1404 | return -ENODEV; | |
1405 | ||
9aad8125 KH |
1406 | /* FIXME: We could support multiple buffers, but we don't. */ |
1407 | if (client->buffer.pages != NULL) | |
1408 | return -EBUSY; | |
1409 | ||
1410 | if (!(vma->vm_flags & VM_SHARED)) | |
1411 | return -EINVAL; | |
19a15b93 | 1412 | |
9aad8125 | 1413 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
1414 | return -EINVAL; |
1415 | ||
1416 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
1417 | size = vma->vm_end - vma->vm_start; |
1418 | page_count = size >> PAGE_SHIFT; | |
1419 | if (size & ~PAGE_MASK) | |
1420 | return -EINVAL; | |
1421 | ||
1422 | if (vma->vm_flags & VM_WRITE) | |
1423 | direction = DMA_TO_DEVICE; | |
1424 | else | |
1425 | direction = DMA_FROM_DEVICE; | |
1426 | ||
2dbd7d7e SR |
1427 | ret = fw_iso_buffer_init(&client->buffer, client->device->card, |
1428 | page_count, direction); | |
1429 | if (ret < 0) | |
1430 | return ret; | |
19a15b93 | 1431 | |
2dbd7d7e SR |
1432 | ret = fw_iso_buffer_map(&client->buffer, vma); |
1433 | if (ret < 0) | |
9aad8125 KH |
1434 | fw_iso_buffer_destroy(&client->buffer, client->device->card); |
1435 | ||
2dbd7d7e | 1436 | return ret; |
19a15b93 KH |
1437 | } |
1438 | ||
45ee3199 JF |
1439 | static int shutdown_resource(int id, void *p, void *data) |
1440 | { | |
e21fcf79 | 1441 | struct client_resource *resource = p; |
45ee3199 JF |
1442 | struct client *client = data; |
1443 | ||
e21fcf79 | 1444 | resource->release(client, resource); |
fb443036 | 1445 | client_put(client); |
45ee3199 JF |
1446 | |
1447 | return 0; | |
1448 | } | |
1449 | ||
19a15b93 KH |
1450 | static int fw_device_op_release(struct inode *inode, struct file *file) |
1451 | { | |
1452 | struct client *client = file->private_data; | |
e21fcf79 | 1453 | struct event *event, *next_event; |
19a15b93 | 1454 | |
97811e34 SR |
1455 | mutex_lock(&client->device->client_list_mutex); |
1456 | list_del(&client->link); | |
1457 | mutex_unlock(&client->device->client_list_mutex); | |
1458 | ||
19a15b93 KH |
1459 | if (client->iso_context) |
1460 | fw_iso_context_destroy(client->iso_context); | |
1461 | ||
36a755cf SR |
1462 | if (client->buffer.pages) |
1463 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
1464 | ||
45ee3199 | 1465 | /* Freeze client->resource_idr and client->event_list */ |
3ba94986 | 1466 | spin_lock_irq(&client->lock); |
45ee3199 | 1467 | client->in_shutdown = true; |
3ba94986 | 1468 | spin_unlock_irq(&client->lock); |
66dea3e5 | 1469 | |
45ee3199 JF |
1470 | idr_for_each(&client->resource_idr, shutdown_resource, client); |
1471 | idr_remove_all(&client->resource_idr); | |
1472 | idr_destroy(&client->resource_idr); | |
28cf6a04 | 1473 | |
e21fcf79 SR |
1474 | list_for_each_entry_safe(event, next_event, &client->event_list, link) |
1475 | kfree(event); | |
19a15b93 | 1476 | |
fb443036 | 1477 | client_put(client); |
19a15b93 KH |
1478 | |
1479 | return 0; | |
1480 | } | |
1481 | ||
1482 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
1483 | { | |
1484 | struct client *client = file->private_data; | |
2603bf21 | 1485 | unsigned int mask = 0; |
19a15b93 KH |
1486 | |
1487 | poll_wait(file, &client->wait, pt); | |
1488 | ||
2603bf21 KH |
1489 | if (fw_device_is_shutdown(client->device)) |
1490 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 1491 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
1492 | mask |= POLLIN | POLLRDNORM; |
1493 | ||
1494 | return mask; | |
19a15b93 KH |
1495 | } |
1496 | ||
21ebcd12 | 1497 | const struct file_operations fw_device_ops = { |
19a15b93 KH |
1498 | .owner = THIS_MODULE, |
1499 | .open = fw_device_op_open, | |
1500 | .read = fw_device_op_read, | |
1501 | .unlocked_ioctl = fw_device_op_ioctl, | |
1502 | .poll = fw_device_op_poll, | |
1503 | .release = fw_device_op_release, | |
1504 | .mmap = fw_device_op_mmap, | |
1505 | ||
1506 | #ifdef CONFIG_COMPAT | |
5af4e5ea | 1507 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
1508 | #endif |
1509 | }; |