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; | |
08bd34c9 | 109 | struct fw_card *card; |
97c18b7f SR |
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 | |
3ac26b2e | 230 | return nonseekable_open(inode, file); |
19a15b93 KH |
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 | |
08bd34c9 | 629 | fw_send_response(r->card, r->request, 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 | 634 | int tcode, int destination, int source, |
33e553fe | 635 | int generation, unsigned long long offset, |
53dca511 | 636 | void *payload, size_t length, void *callback_data) |
19a15b93 | 637 | { |
97c18b7f SR |
638 | struct address_handler_resource *handler = callback_data; |
639 | struct inbound_transaction_resource *r; | |
640 | struct inbound_transaction_event *e; | |
281e2032 | 641 | void *fcp_frame = NULL; |
45ee3199 | 642 | int ret; |
19a15b93 | 643 | |
97c18b7f | 644 | r = kmalloc(sizeof(*r), GFP_ATOMIC); |
2d826cc5 | 645 | e = kmalloc(sizeof(*e), GFP_ATOMIC); |
97c18b7f | 646 | if (r == NULL || e == NULL) |
45ee3199 | 647 | goto failed; |
19a15b93 | 648 | |
08bd34c9 | 649 | r->card = card; |
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 | ||
a10c0ce7 CL |
759 | if (a->length != fw_get_response_length(r->request)) { |
760 | ret = -EINVAL; | |
761 | kfree(r->request); | |
762 | goto out; | |
763 | } | |
764 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length)) { | |
281e2032 SR |
765 | ret = -EFAULT; |
766 | kfree(r->request); | |
767 | goto out; | |
7e44c0b5 | 768 | } |
08bd34c9 | 769 | fw_send_response(r->card, r->request, a->rcode); |
7e44c0b5 | 770 | out: |
19a15b93 KH |
771 | kfree(r); |
772 | ||
7e44c0b5 | 773 | return ret; |
19a15b93 KH |
774 | } |
775 | ||
6e95dea7 | 776 | static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg) |
5371842b | 777 | { |
6e95dea7 SR |
778 | return fw_core_initiate_bus_reset(client->device->card, |
779 | arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET); | |
5371842b KH |
780 | } |
781 | ||
3964a449 KH |
782 | static void release_descriptor(struct client *client, |
783 | struct client_resource *resource) | |
784 | { | |
97c18b7f SR |
785 | struct descriptor_resource *r = |
786 | container_of(resource, struct descriptor_resource, resource); | |
3964a449 | 787 | |
97c18b7f SR |
788 | fw_core_remove_descriptor(&r->descriptor); |
789 | kfree(r); | |
3964a449 KH |
790 | } |
791 | ||
6e95dea7 | 792 | static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 793 | { |
6e95dea7 | 794 | struct fw_cdev_add_descriptor *a = &arg->add_descriptor; |
97c18b7f | 795 | struct descriptor_resource *r; |
45ee3199 | 796 | int ret; |
66dea3e5 | 797 | |
de487da8 | 798 | /* Access policy: Allow this ioctl only on local nodes' device files. */ |
92368890 | 799 | if (!client->device->is_local) |
de487da8 SR |
800 | return -ENOSYS; |
801 | ||
6e95dea7 | 802 | if (a->length > 256) |
66dea3e5 KH |
803 | return -EINVAL; |
804 | ||
6e95dea7 | 805 | r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL); |
97c18b7f | 806 | if (r == NULL) |
66dea3e5 KH |
807 | return -ENOMEM; |
808 | ||
6e95dea7 | 809 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) { |
45ee3199 JF |
810 | ret = -EFAULT; |
811 | goto failed; | |
66dea3e5 KH |
812 | } |
813 | ||
6e95dea7 SR |
814 | r->descriptor.length = a->length; |
815 | r->descriptor.immediate = a->immediate; | |
816 | r->descriptor.key = a->key; | |
97c18b7f | 817 | r->descriptor.data = r->data; |
66dea3e5 | 818 | |
97c18b7f | 819 | ret = fw_core_add_descriptor(&r->descriptor); |
45ee3199 JF |
820 | if (ret < 0) |
821 | goto failed; | |
66dea3e5 | 822 | |
97c18b7f SR |
823 | r->resource.release = release_descriptor; |
824 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 825 | if (ret < 0) { |
97c18b7f | 826 | fw_core_remove_descriptor(&r->descriptor); |
45ee3199 JF |
827 | goto failed; |
828 | } | |
6e95dea7 | 829 | a->handle = r->resource.handle; |
66dea3e5 KH |
830 | |
831 | return 0; | |
45ee3199 | 832 | failed: |
97c18b7f | 833 | kfree(r); |
45ee3199 JF |
834 | |
835 | return ret; | |
66dea3e5 KH |
836 | } |
837 | ||
6e95dea7 | 838 | static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 839 | { |
6e95dea7 | 840 | return release_client_resource(client, arg->remove_descriptor.handle, |
45ee3199 | 841 | release_descriptor, NULL); |
66dea3e5 KH |
842 | } |
843 | ||
53dca511 SR |
844 | static void iso_callback(struct fw_iso_context *context, u32 cycle, |
845 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
846 | { |
847 | struct client *client = data; | |
97c18b7f | 848 | struct iso_interrupt_event *e; |
19a15b93 | 849 | |
56d04cb1 | 850 | e = kmalloc(sizeof(*e) + header_length, GFP_ATOMIC); |
97c18b7f | 851 | if (e == NULL) |
19a15b93 KH |
852 | return; |
853 | ||
97c18b7f SR |
854 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
855 | e->interrupt.closure = client->iso_closure; | |
856 | e->interrupt.cycle = cycle; | |
857 | e->interrupt.header_length = header_length; | |
858 | memcpy(e->interrupt.header, header, header_length); | |
859 | queue_event(client, &e->event, &e->interrupt, | |
860 | sizeof(e->interrupt) + header_length, NULL, 0); | |
19a15b93 KH |
861 | } |
862 | ||
6e95dea7 | 863 | static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) |
19a15b93 | 864 | { |
6e95dea7 | 865 | struct fw_cdev_create_iso_context *a = &arg->create_iso_context; |
24315c5e | 866 | struct fw_iso_context *context; |
19a15b93 | 867 | |
6e95dea7 | 868 | if (a->channel > 63) |
21efb3cf KH |
869 | return -EINVAL; |
870 | ||
6e95dea7 | 871 | switch (a->type) { |
c70dc788 | 872 | case FW_ISO_CONTEXT_RECEIVE: |
6e95dea7 | 873 | if (a->header_size < 4 || (a->header_size & 3)) |
c70dc788 | 874 | return -EINVAL; |
c70dc788 KH |
875 | break; |
876 | ||
877 | case FW_ISO_CONTEXT_TRANSMIT: | |
6e95dea7 | 878 | if (a->speed > SCODE_3200) |
c70dc788 | 879 | return -EINVAL; |
c70dc788 KH |
880 | break; |
881 | ||
882 | default: | |
21efb3cf | 883 | return -EINVAL; |
c70dc788 KH |
884 | } |
885 | ||
6e95dea7 SR |
886 | context = fw_iso_context_create(client->device->card, a->type, |
887 | a->channel, a->speed, a->header_size, | |
888 | iso_callback, client); | |
24315c5e KH |
889 | if (IS_ERR(context)) |
890 | return PTR_ERR(context); | |
891 | ||
bdfe273e CL |
892 | /* We only support one context at this time. */ |
893 | spin_lock_irq(&client->lock); | |
894 | if (client->iso_context != NULL) { | |
895 | spin_unlock_irq(&client->lock); | |
896 | fw_iso_context_destroy(context); | |
897 | return -EBUSY; | |
898 | } | |
6e95dea7 | 899 | client->iso_closure = a->closure; |
24315c5e | 900 | client->iso_context = context; |
bdfe273e | 901 | spin_unlock_irq(&client->lock); |
19a15b93 | 902 | |
6e95dea7 | 903 | a->handle = 0; |
abaa5743 | 904 | |
19a15b93 KH |
905 | return 0; |
906 | } | |
907 | ||
1ca31ae7 KH |
908 | /* Macros for decoding the iso packet control header. */ |
909 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) | |
910 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) | |
911 | #define GET_SKIP(v) (((v) >> 17) & 0x01) | |
7a100344 SR |
912 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
913 | #define GET_SY(v) (((v) >> 20) & 0x0f) | |
1ca31ae7 KH |
914 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
915 | ||
6e95dea7 | 916 | static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 917 | { |
6e95dea7 | 918 | struct fw_cdev_queue_iso *a = &arg->queue_iso; |
19a15b93 | 919 | struct fw_cdev_iso_packet __user *p, *end, *next; |
9b32d5f3 | 920 | struct fw_iso_context *ctx = client->iso_context; |
ef370ee7 | 921 | unsigned long payload, buffer_end, header_length; |
1ca31ae7 | 922 | u32 control; |
19a15b93 KH |
923 | int count; |
924 | struct { | |
925 | struct fw_iso_packet packet; | |
926 | u8 header[256]; | |
927 | } u; | |
928 | ||
6e95dea7 | 929 | if (ctx == NULL || a->handle != 0) |
19a15b93 | 930 | return -EINVAL; |
19a15b93 | 931 | |
c781c06d KH |
932 | /* |
933 | * If the user passes a non-NULL data pointer, has mmap()'ed | |
19a15b93 KH |
934 | * the iso buffer, and the pointer points inside the buffer, |
935 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 936 | * set them both to 0, which will still let packets with |
19a15b93 KH |
937 | * payload_length == 0 through. In other words, if no packets |
938 | * use the indirect payload, the iso buffer need not be mapped | |
6e95dea7 | 939 | * and the a->data pointer is ignored. |
c781c06d | 940 | */ |
19a15b93 | 941 | |
6e95dea7 | 942 | payload = (unsigned long)a->data - client->vm_start; |
ef370ee7 | 943 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
6e95dea7 | 944 | if (a->data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 945 | payload >= buffer_end) { |
9aad8125 | 946 | payload = 0; |
ef370ee7 | 947 | buffer_end = 0; |
19a15b93 KH |
948 | } |
949 | ||
6e95dea7 | 950 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets); |
1ccc9147 | 951 | |
6e95dea7 | 952 | if (!access_ok(VERIFY_READ, p, a->size)) |
19a15b93 KH |
953 | return -EFAULT; |
954 | ||
6e95dea7 | 955 | end = (void __user *)p + a->size; |
19a15b93 KH |
956 | count = 0; |
957 | while (p < end) { | |
1ca31ae7 | 958 | if (get_user(control, &p->control)) |
19a15b93 | 959 | return -EFAULT; |
1ca31ae7 KH |
960 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
961 | u.packet.interrupt = GET_INTERRUPT(control); | |
962 | u.packet.skip = GET_SKIP(control); | |
963 | u.packet.tag = GET_TAG(control); | |
964 | u.packet.sy = GET_SY(control); | |
965 | u.packet.header_length = GET_HEADER_LENGTH(control); | |
295e3feb | 966 | |
9b32d5f3 | 967 | if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) { |
385ab5bc CL |
968 | if (u.packet.header_length % 4 != 0) |
969 | return -EINVAL; | |
295e3feb KH |
970 | header_length = u.packet.header_length; |
971 | } else { | |
c781c06d KH |
972 | /* |
973 | * We require that header_length is a multiple of | |
974 | * the fixed header size, ctx->header_size. | |
975 | */ | |
9b32d5f3 KH |
976 | if (ctx->header_size == 0) { |
977 | if (u.packet.header_length > 0) | |
978 | return -EINVAL; | |
4ba1d9c0 CL |
979 | } else if (u.packet.header_length == 0 || |
980 | u.packet.header_length % ctx->header_size != 0) { | |
295e3feb | 981 | return -EINVAL; |
9b32d5f3 | 982 | } |
295e3feb KH |
983 | header_length = 0; |
984 | } | |
985 | ||
19a15b93 | 986 | next = (struct fw_cdev_iso_packet __user *) |
295e3feb | 987 | &p->header[header_length / 4]; |
19a15b93 KH |
988 | if (next > end) |
989 | return -EINVAL; | |
990 | if (__copy_from_user | |
295e3feb | 991 | (u.packet.header, p->header, header_length)) |
19a15b93 | 992 | return -EFAULT; |
98b6cbe8 | 993 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
994 | u.packet.header_length + u.packet.payload_length > 0) |
995 | return -EINVAL; | |
ef370ee7 | 996 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
997 | return -EINVAL; |
998 | ||
9b32d5f3 KH |
999 | if (fw_iso_context_queue(ctx, &u.packet, |
1000 | &client->buffer, payload)) | |
19a15b93 KH |
1001 | break; |
1002 | ||
1003 | p = next; | |
1004 | payload += u.packet.payload_length; | |
1005 | count++; | |
1006 | } | |
1007 | ||
6e95dea7 SR |
1008 | a->size -= uptr_to_u64(p) - a->packets; |
1009 | a->packets = uptr_to_u64(p); | |
1010 | a->data = client->vm_start + payload; | |
19a15b93 KH |
1011 | |
1012 | return count; | |
1013 | } | |
1014 | ||
6e95dea7 | 1015 | static int ioctl_start_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1016 | { |
6e95dea7 | 1017 | struct fw_cdev_start_iso *a = &arg->start_iso; |
19a15b93 | 1018 | |
6e95dea7 | 1019 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 | 1020 | return -EINVAL; |
fae60312 | 1021 | |
6e95dea7 SR |
1022 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE && |
1023 | (a->tags == 0 || a->tags > 15 || a->sync > 15)) | |
1024 | return -EINVAL; | |
eb0306ea | 1025 | |
6e95dea7 SR |
1026 | return fw_iso_context_start(client->iso_context, |
1027 | a->cycle, a->sync, a->tags); | |
19a15b93 KH |
1028 | } |
1029 | ||
6e95dea7 | 1030 | static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg) |
b8295668 | 1031 | { |
6e95dea7 | 1032 | struct fw_cdev_stop_iso *a = &arg->stop_iso; |
abaa5743 | 1033 | |
6e95dea7 | 1034 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 KH |
1035 | return -EINVAL; |
1036 | ||
b8295668 KH |
1037 | return fw_iso_context_stop(client->iso_context); |
1038 | } | |
1039 | ||
6e95dea7 | 1040 | static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg) |
a64408b9 | 1041 | { |
6e95dea7 | 1042 | struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2; |
a64408b9 | 1043 | struct fw_card *card = client->device->card; |
abfe5a01 | 1044 | struct timespec ts = {0, 0}; |
4a9bde9b | 1045 | u32 cycle_time; |
abfe5a01 | 1046 | int ret = 0; |
a64408b9 | 1047 | |
4a9bde9b | 1048 | local_irq_disable(); |
a64408b9 | 1049 | |
0fcff4e3 | 1050 | cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME); |
abfe5a01 | 1051 | |
6e95dea7 | 1052 | switch (a->clk_id) { |
abfe5a01 SR |
1053 | case CLOCK_REALTIME: getnstimeofday(&ts); break; |
1054 | case CLOCK_MONOTONIC: do_posix_clock_monotonic_gettime(&ts); break; | |
1055 | case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts); break; | |
1056 | default: | |
1057 | ret = -EINVAL; | |
1058 | } | |
a64408b9 | 1059 | |
4a9bde9b | 1060 | local_irq_enable(); |
a64408b9 | 1061 | |
6e95dea7 SR |
1062 | a->tv_sec = ts.tv_sec; |
1063 | a->tv_nsec = ts.tv_nsec; | |
1064 | a->cycle_timer = cycle_time; | |
abfe5a01 SR |
1065 | |
1066 | return ret; | |
1067 | } | |
1068 | ||
6e95dea7 | 1069 | static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg) |
abfe5a01 | 1070 | { |
6e95dea7 | 1071 | struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer; |
abfe5a01 SR |
1072 | struct fw_cdev_get_cycle_timer2 ct2; |
1073 | ||
1074 | ct2.clk_id = CLOCK_REALTIME; | |
6e95dea7 | 1075 | ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2); |
abfe5a01 | 1076 | |
6e95dea7 SR |
1077 | a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC; |
1078 | a->cycle_timer = ct2.cycle_timer; | |
4a9bde9b | 1079 | |
a64408b9 SR |
1080 | return 0; |
1081 | } | |
1082 | ||
b1bda4cd JFSR |
1083 | static void iso_resource_work(struct work_struct *work) |
1084 | { | |
1085 | struct iso_resource_event *e; | |
1086 | struct iso_resource *r = | |
1087 | container_of(work, struct iso_resource, work.work); | |
1088 | struct client *client = r->client; | |
1089 | int generation, channel, bandwidth, todo; | |
1090 | bool skip, free, success; | |
1091 | ||
1092 | spin_lock_irq(&client->lock); | |
1093 | generation = client->device->generation; | |
1094 | todo = r->todo; | |
1095 | /* Allow 1000ms grace period for other reallocations. */ | |
1096 | if (todo == ISO_RES_ALLOC && | |
1097 | time_is_after_jiffies(client->device->card->reset_jiffies + HZ)) { | |
9fb551bf | 1098 | schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3)); |
b1bda4cd JFSR |
1099 | skip = true; |
1100 | } else { | |
1101 | /* We could be called twice within the same generation. */ | |
1102 | skip = todo == ISO_RES_REALLOC && | |
1103 | r->generation == generation; | |
1104 | } | |
1ec3c026 SR |
1105 | free = todo == ISO_RES_DEALLOC || |
1106 | todo == ISO_RES_ALLOC_ONCE || | |
1107 | todo == ISO_RES_DEALLOC_ONCE; | |
b1bda4cd JFSR |
1108 | r->generation = generation; |
1109 | spin_unlock_irq(&client->lock); | |
1110 | ||
1111 | if (skip) | |
1112 | goto out; | |
1113 | ||
1114 | bandwidth = r->bandwidth; | |
1115 | ||
1116 | fw_iso_resource_manage(client->device->card, generation, | |
1117 | r->channels, &channel, &bandwidth, | |
1ec3c026 SR |
1118 | todo == ISO_RES_ALLOC || |
1119 | todo == ISO_RES_REALLOC || | |
6fdc0370 SR |
1120 | todo == ISO_RES_ALLOC_ONCE, |
1121 | r->transaction_data); | |
b1bda4cd JFSR |
1122 | /* |
1123 | * Is this generation outdated already? As long as this resource sticks | |
1124 | * in the idr, it will be scheduled again for a newer generation or at | |
1125 | * shutdown. | |
1126 | */ | |
1127 | if (channel == -EAGAIN && | |
1128 | (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC)) | |
1129 | goto out; | |
1130 | ||
1131 | success = channel >= 0 || bandwidth > 0; | |
1132 | ||
1133 | spin_lock_irq(&client->lock); | |
1134 | /* | |
1135 | * Transit from allocation to reallocation, except if the client | |
1136 | * requested deallocation in the meantime. | |
1137 | */ | |
1138 | if (r->todo == ISO_RES_ALLOC) | |
1139 | r->todo = ISO_RES_REALLOC; | |
1140 | /* | |
1141 | * Allocation or reallocation failure? Pull this resource out of the | |
1142 | * idr and prepare for deletion, unless the client is shutting down. | |
1143 | */ | |
1144 | if (r->todo == ISO_RES_REALLOC && !success && | |
1145 | !client->in_shutdown && | |
1146 | idr_find(&client->resource_idr, r->resource.handle)) { | |
1147 | idr_remove(&client->resource_idr, r->resource.handle); | |
1148 | client_put(client); | |
1149 | free = true; | |
1150 | } | |
1151 | spin_unlock_irq(&client->lock); | |
1152 | ||
1153 | if (todo == ISO_RES_ALLOC && channel >= 0) | |
5d9cb7d2 | 1154 | r->channels = 1ULL << channel; |
b1bda4cd JFSR |
1155 | |
1156 | if (todo == ISO_RES_REALLOC && success) | |
1157 | goto out; | |
1158 | ||
1ec3c026 | 1159 | if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) { |
b1bda4cd JFSR |
1160 | e = r->e_alloc; |
1161 | r->e_alloc = NULL; | |
1162 | } else { | |
1163 | e = r->e_dealloc; | |
1164 | r->e_dealloc = NULL; | |
1165 | } | |
e21fcf79 SR |
1166 | e->iso_resource.handle = r->resource.handle; |
1167 | e->iso_resource.channel = channel; | |
1168 | e->iso_resource.bandwidth = bandwidth; | |
b1bda4cd JFSR |
1169 | |
1170 | queue_event(client, &e->event, | |
e21fcf79 | 1171 | &e->iso_resource, sizeof(e->iso_resource), NULL, 0); |
b1bda4cd JFSR |
1172 | |
1173 | if (free) { | |
1174 | cancel_delayed_work(&r->work); | |
1175 | kfree(r->e_alloc); | |
1176 | kfree(r->e_dealloc); | |
1177 | kfree(r); | |
1178 | } | |
1179 | out: | |
1180 | client_put(client); | |
1181 | } | |
1182 | ||
b1bda4cd JFSR |
1183 | static void release_iso_resource(struct client *client, |
1184 | struct client_resource *resource) | |
1185 | { | |
1186 | struct iso_resource *r = | |
1187 | container_of(resource, struct iso_resource, resource); | |
1188 | ||
1189 | spin_lock_irq(&client->lock); | |
1190 | r->todo = ISO_RES_DEALLOC; | |
9fb551bf | 1191 | schedule_iso_resource(r, 0); |
b1bda4cd JFSR |
1192 | spin_unlock_irq(&client->lock); |
1193 | } | |
1194 | ||
1ec3c026 SR |
1195 | static int init_iso_resource(struct client *client, |
1196 | struct fw_cdev_allocate_iso_resource *request, int todo) | |
b1bda4cd | 1197 | { |
b1bda4cd JFSR |
1198 | struct iso_resource_event *e1, *e2; |
1199 | struct iso_resource *r; | |
1200 | int ret; | |
1201 | ||
1202 | if ((request->channels == 0 && request->bandwidth == 0) || | |
1203 | request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL || | |
1204 | request->bandwidth < 0) | |
1205 | return -EINVAL; | |
1206 | ||
1207 | r = kmalloc(sizeof(*r), GFP_KERNEL); | |
1208 | e1 = kmalloc(sizeof(*e1), GFP_KERNEL); | |
1209 | e2 = kmalloc(sizeof(*e2), GFP_KERNEL); | |
1210 | if (r == NULL || e1 == NULL || e2 == NULL) { | |
1211 | ret = -ENOMEM; | |
1212 | goto fail; | |
1213 | } | |
1214 | ||
1215 | INIT_DELAYED_WORK(&r->work, iso_resource_work); | |
1216 | r->client = client; | |
1ec3c026 | 1217 | r->todo = todo; |
b1bda4cd JFSR |
1218 | r->generation = -1; |
1219 | r->channels = request->channels; | |
1220 | r->bandwidth = request->bandwidth; | |
1221 | r->e_alloc = e1; | |
1222 | r->e_dealloc = e2; | |
1223 | ||
e21fcf79 SR |
1224 | e1->iso_resource.closure = request->closure; |
1225 | e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED; | |
1226 | e2->iso_resource.closure = request->closure; | |
1227 | e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED; | |
b1bda4cd | 1228 | |
1ec3c026 SR |
1229 | if (todo == ISO_RES_ALLOC) { |
1230 | r->resource.release = release_iso_resource; | |
1231 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
81610b8f SR |
1232 | if (ret < 0) |
1233 | goto fail; | |
1ec3c026 SR |
1234 | } else { |
1235 | r->resource.release = NULL; | |
1236 | r->resource.handle = -1; | |
9fb551bf | 1237 | schedule_iso_resource(r, 0); |
1ec3c026 | 1238 | } |
b1bda4cd JFSR |
1239 | request->handle = r->resource.handle; |
1240 | ||
1241 | return 0; | |
1242 | fail: | |
1243 | kfree(r); | |
1244 | kfree(e1); | |
1245 | kfree(e2); | |
1246 | ||
1247 | return ret; | |
1248 | } | |
1249 | ||
6e95dea7 SR |
1250 | static int ioctl_allocate_iso_resource(struct client *client, |
1251 | union ioctl_arg *arg) | |
1ec3c026 | 1252 | { |
6e95dea7 SR |
1253 | return init_iso_resource(client, |
1254 | &arg->allocate_iso_resource, ISO_RES_ALLOC); | |
1ec3c026 SR |
1255 | } |
1256 | ||
6e95dea7 SR |
1257 | static int ioctl_deallocate_iso_resource(struct client *client, |
1258 | union ioctl_arg *arg) | |
b1bda4cd | 1259 | { |
6e95dea7 SR |
1260 | return release_client_resource(client, |
1261 | arg->deallocate.handle, release_iso_resource, NULL); | |
b1bda4cd JFSR |
1262 | } |
1263 | ||
6e95dea7 SR |
1264 | static int ioctl_allocate_iso_resource_once(struct client *client, |
1265 | union ioctl_arg *arg) | |
1ec3c026 | 1266 | { |
6e95dea7 SR |
1267 | return init_iso_resource(client, |
1268 | &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE); | |
1ec3c026 SR |
1269 | } |
1270 | ||
6e95dea7 SR |
1271 | static int ioctl_deallocate_iso_resource_once(struct client *client, |
1272 | union ioctl_arg *arg) | |
1ec3c026 | 1273 | { |
6e95dea7 SR |
1274 | return init_iso_resource(client, |
1275 | &arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE); | |
1ec3c026 SR |
1276 | } |
1277 | ||
c8a25900 SR |
1278 | /* |
1279 | * Returns a speed code: Maximum speed to or from this device, | |
1280 | * limited by the device's link speed, the local node's link speed, | |
1281 | * and all PHY port speeds between the two links. | |
1282 | */ | |
6e95dea7 | 1283 | static int ioctl_get_speed(struct client *client, union ioctl_arg *arg) |
33580a3e | 1284 | { |
c8a25900 | 1285 | return client->device->max_speed; |
33580a3e SR |
1286 | } |
1287 | ||
6e95dea7 SR |
1288 | static int ioctl_send_broadcast_request(struct client *client, |
1289 | union ioctl_arg *arg) | |
acfe8333 | 1290 | { |
6e95dea7 | 1291 | struct fw_cdev_send_request *a = &arg->send_request; |
acfe8333 | 1292 | |
6e95dea7 | 1293 | switch (a->tcode) { |
acfe8333 JFSR |
1294 | case TCODE_WRITE_QUADLET_REQUEST: |
1295 | case TCODE_WRITE_BLOCK_REQUEST: | |
1296 | break; | |
1297 | default: | |
1298 | return -EINVAL; | |
1299 | } | |
1300 | ||
1566f3dc | 1301 | /* Security policy: Only allow accesses to Units Space. */ |
6e95dea7 | 1302 | if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END) |
1566f3dc SR |
1303 | return -EACCES; |
1304 | ||
6e95dea7 | 1305 | return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100); |
acfe8333 JFSR |
1306 | } |
1307 | ||
6e95dea7 | 1308 | static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg) |
f8c2287c | 1309 | { |
6e95dea7 | 1310 | struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet; |
18e9b10f SR |
1311 | struct fw_cdev_send_request request; |
1312 | int dest; | |
f8c2287c | 1313 | |
6e95dea7 SR |
1314 | if (a->speed > client->device->card->link_speed || |
1315 | a->length > 1024 << a->speed) | |
18e9b10f | 1316 | return -EIO; |
f8c2287c | 1317 | |
6e95dea7 | 1318 | if (a->tag > 3 || a->channel > 63 || a->sy > 15) |
18e9b10f SR |
1319 | return -EINVAL; |
1320 | ||
6e95dea7 | 1321 | dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy); |
18e9b10f | 1322 | request.tcode = TCODE_STREAM_DATA; |
6e95dea7 SR |
1323 | request.length = a->length; |
1324 | request.closure = a->closure; | |
1325 | request.data = a->data; | |
1326 | request.generation = a->generation; | |
18e9b10f | 1327 | |
6e95dea7 | 1328 | return init_request(client, &request, dest, a->speed); |
f8c2287c JF |
1329 | } |
1330 | ||
6e95dea7 | 1331 | static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = { |
4f259223 KH |
1332 | ioctl_get_info, |
1333 | ioctl_send_request, | |
1334 | ioctl_allocate, | |
1335 | ioctl_deallocate, | |
1336 | ioctl_send_response, | |
1337 | ioctl_initiate_bus_reset, | |
1338 | ioctl_add_descriptor, | |
1339 | ioctl_remove_descriptor, | |
1340 | ioctl_create_iso_context, | |
1341 | ioctl_queue_iso, | |
1342 | ioctl_start_iso, | |
1343 | ioctl_stop_iso, | |
a64408b9 | 1344 | ioctl_get_cycle_timer, |
b1bda4cd JFSR |
1345 | ioctl_allocate_iso_resource, |
1346 | ioctl_deallocate_iso_resource, | |
1ec3c026 SR |
1347 | ioctl_allocate_iso_resource_once, |
1348 | ioctl_deallocate_iso_resource_once, | |
33580a3e | 1349 | ioctl_get_speed, |
acfe8333 | 1350 | ioctl_send_broadcast_request, |
f8c2287c | 1351 | ioctl_send_stream_packet, |
abfe5a01 | 1352 | ioctl_get_cycle_timer2, |
4f259223 KH |
1353 | }; |
1354 | ||
53dca511 SR |
1355 | static int dispatch_ioctl(struct client *client, |
1356 | unsigned int cmd, void __user *arg) | |
19a15b93 | 1357 | { |
6e95dea7 | 1358 | union ioctl_arg buffer; |
2dbd7d7e | 1359 | int ret; |
4f259223 | 1360 | |
64582298 SR |
1361 | if (fw_device_is_shutdown(client->device)) |
1362 | return -ENODEV; | |
1363 | ||
4f259223 | 1364 | if (_IOC_TYPE(cmd) != '#' || |
9cac00b8 SR |
1365 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) || |
1366 | _IOC_SIZE(cmd) > sizeof(buffer)) | |
19a15b93 | 1367 | return -EINVAL; |
4f259223 | 1368 | |
9cac00b8 SR |
1369 | if (_IOC_DIR(cmd) == _IOC_READ) |
1370 | memset(&buffer, 0, _IOC_SIZE(cmd)); | |
1371 | ||
1372 | if (_IOC_DIR(cmd) & _IOC_WRITE) | |
1373 | if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd))) | |
4f259223 | 1374 | return -EFAULT; |
4f259223 | 1375 | |
6e95dea7 | 1376 | ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer); |
2dbd7d7e SR |
1377 | if (ret < 0) |
1378 | return ret; | |
4f259223 | 1379 | |
9cac00b8 SR |
1380 | if (_IOC_DIR(cmd) & _IOC_READ) |
1381 | if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd))) | |
4f259223 | 1382 | return -EFAULT; |
4f259223 | 1383 | |
2dbd7d7e | 1384 | return ret; |
19a15b93 KH |
1385 | } |
1386 | ||
53dca511 SR |
1387 | static long fw_device_op_ioctl(struct file *file, |
1388 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1389 | { |
64582298 | 1390 | return dispatch_ioctl(file->private_data, cmd, (void __user *)arg); |
19a15b93 KH |
1391 | } |
1392 | ||
1393 | #ifdef CONFIG_COMPAT | |
53dca511 SR |
1394 | static long fw_device_op_compat_ioctl(struct file *file, |
1395 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1396 | { |
64582298 | 1397 | return dispatch_ioctl(file->private_data, cmd, compat_ptr(arg)); |
19a15b93 KH |
1398 | } |
1399 | #endif | |
1400 | ||
1401 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
1402 | { | |
1403 | struct client *client = file->private_data; | |
9aad8125 KH |
1404 | enum dma_data_direction direction; |
1405 | unsigned long size; | |
2dbd7d7e | 1406 | int page_count, ret; |
9aad8125 | 1407 | |
551f4cb9 JF |
1408 | if (fw_device_is_shutdown(client->device)) |
1409 | return -ENODEV; | |
1410 | ||
9aad8125 KH |
1411 | /* FIXME: We could support multiple buffers, but we don't. */ |
1412 | if (client->buffer.pages != NULL) | |
1413 | return -EBUSY; | |
1414 | ||
1415 | if (!(vma->vm_flags & VM_SHARED)) | |
1416 | return -EINVAL; | |
19a15b93 | 1417 | |
9aad8125 | 1418 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
1419 | return -EINVAL; |
1420 | ||
1421 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
1422 | size = vma->vm_end - vma->vm_start; |
1423 | page_count = size >> PAGE_SHIFT; | |
1424 | if (size & ~PAGE_MASK) | |
1425 | return -EINVAL; | |
1426 | ||
1427 | if (vma->vm_flags & VM_WRITE) | |
1428 | direction = DMA_TO_DEVICE; | |
1429 | else | |
1430 | direction = DMA_FROM_DEVICE; | |
1431 | ||
2dbd7d7e SR |
1432 | ret = fw_iso_buffer_init(&client->buffer, client->device->card, |
1433 | page_count, direction); | |
1434 | if (ret < 0) | |
1435 | return ret; | |
19a15b93 | 1436 | |
2dbd7d7e SR |
1437 | ret = fw_iso_buffer_map(&client->buffer, vma); |
1438 | if (ret < 0) | |
9aad8125 KH |
1439 | fw_iso_buffer_destroy(&client->buffer, client->device->card); |
1440 | ||
2dbd7d7e | 1441 | return ret; |
19a15b93 KH |
1442 | } |
1443 | ||
45ee3199 JF |
1444 | static int shutdown_resource(int id, void *p, void *data) |
1445 | { | |
e21fcf79 | 1446 | struct client_resource *resource = p; |
45ee3199 JF |
1447 | struct client *client = data; |
1448 | ||
e21fcf79 | 1449 | resource->release(client, resource); |
fb443036 | 1450 | client_put(client); |
45ee3199 JF |
1451 | |
1452 | return 0; | |
1453 | } | |
1454 | ||
19a15b93 KH |
1455 | static int fw_device_op_release(struct inode *inode, struct file *file) |
1456 | { | |
1457 | struct client *client = file->private_data; | |
e21fcf79 | 1458 | struct event *event, *next_event; |
19a15b93 | 1459 | |
97811e34 SR |
1460 | mutex_lock(&client->device->client_list_mutex); |
1461 | list_del(&client->link); | |
1462 | mutex_unlock(&client->device->client_list_mutex); | |
1463 | ||
19a15b93 KH |
1464 | if (client->iso_context) |
1465 | fw_iso_context_destroy(client->iso_context); | |
1466 | ||
36a755cf SR |
1467 | if (client->buffer.pages) |
1468 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
1469 | ||
45ee3199 | 1470 | /* Freeze client->resource_idr and client->event_list */ |
3ba94986 | 1471 | spin_lock_irq(&client->lock); |
45ee3199 | 1472 | client->in_shutdown = true; |
3ba94986 | 1473 | spin_unlock_irq(&client->lock); |
66dea3e5 | 1474 | |
45ee3199 JF |
1475 | idr_for_each(&client->resource_idr, shutdown_resource, client); |
1476 | idr_remove_all(&client->resource_idr); | |
1477 | idr_destroy(&client->resource_idr); | |
28cf6a04 | 1478 | |
e21fcf79 SR |
1479 | list_for_each_entry_safe(event, next_event, &client->event_list, link) |
1480 | kfree(event); | |
19a15b93 | 1481 | |
fb443036 | 1482 | client_put(client); |
19a15b93 KH |
1483 | |
1484 | return 0; | |
1485 | } | |
1486 | ||
1487 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
1488 | { | |
1489 | struct client *client = file->private_data; | |
2603bf21 | 1490 | unsigned int mask = 0; |
19a15b93 KH |
1491 | |
1492 | poll_wait(file, &client->wait, pt); | |
1493 | ||
2603bf21 KH |
1494 | if (fw_device_is_shutdown(client->device)) |
1495 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 1496 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
1497 | mask |= POLLIN | POLLRDNORM; |
1498 | ||
1499 | return mask; | |
19a15b93 KH |
1500 | } |
1501 | ||
21ebcd12 | 1502 | const struct file_operations fw_device_ops = { |
19a15b93 | 1503 | .owner = THIS_MODULE, |
3ac26b2e | 1504 | .llseek = no_llseek, |
19a15b93 KH |
1505 | .open = fw_device_op_open, |
1506 | .read = fw_device_op_read, | |
1507 | .unlocked_ioctl = fw_device_op_ioctl, | |
19a15b93 | 1508 | .mmap = fw_device_op_mmap, |
3ac26b2e SR |
1509 | .release = fw_device_op_release, |
1510 | .poll = fw_device_op_poll, | |
19a15b93 | 1511 | #ifdef CONFIG_COMPAT |
5af4e5ea | 1512 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
1513 | #endif |
1514 | }; |