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 | |
604f4516 SR |
49 | /* |
50 | * ABI version history is documented in linux/firewire-cdev.h. | |
51 | */ | |
e205597d SR |
52 | #define FW_CDEV_KERNEL_VERSION 4 |
53 | #define FW_CDEV_VERSION_EVENT_REQUEST2 4 | |
604f4516 | 54 | |
19a15b93 | 55 | struct client { |
344bbc4d | 56 | u32 version; |
19a15b93 | 57 | struct fw_device *device; |
45ee3199 | 58 | |
19a15b93 | 59 | spinlock_t lock; |
45ee3199 JF |
60 | bool in_shutdown; |
61 | struct idr resource_idr; | |
19a15b93 | 62 | struct list_head event_list; |
19a15b93 | 63 | wait_queue_head_t wait; |
da8ecffa | 64 | u64 bus_reset_closure; |
9aad8125 | 65 | |
19a15b93 | 66 | struct fw_iso_context *iso_context; |
abaa5743 | 67 | u64 iso_closure; |
9aad8125 KH |
68 | struct fw_iso_buffer buffer; |
69 | unsigned long vm_start; | |
97bd9efa KH |
70 | |
71 | struct list_head link; | |
fb443036 | 72 | struct kref kref; |
19a15b93 KH |
73 | }; |
74 | ||
fb443036 SR |
75 | static inline void client_get(struct client *client) |
76 | { | |
77 | kref_get(&client->kref); | |
78 | } | |
79 | ||
80 | static void client_release(struct kref *kref) | |
81 | { | |
82 | struct client *client = container_of(kref, struct client, kref); | |
83 | ||
84 | fw_device_put(client->device); | |
85 | kfree(client); | |
86 | } | |
87 | ||
88 | static void client_put(struct client *client) | |
89 | { | |
90 | kref_put(&client->kref, client_release); | |
91 | } | |
92 | ||
97c18b7f SR |
93 | struct client_resource; |
94 | typedef void (*client_resource_release_fn_t)(struct client *, | |
95 | struct client_resource *); | |
96 | struct client_resource { | |
97 | client_resource_release_fn_t release; | |
98 | int handle; | |
99 | }; | |
100 | ||
101 | struct address_handler_resource { | |
102 | struct client_resource resource; | |
103 | struct fw_address_handler handler; | |
104 | __u64 closure; | |
105 | struct client *client; | |
106 | }; | |
107 | ||
108 | struct outbound_transaction_resource { | |
109 | struct client_resource resource; | |
110 | struct fw_transaction transaction; | |
111 | }; | |
112 | ||
113 | struct inbound_transaction_resource { | |
114 | struct client_resource resource; | |
08bd34c9 | 115 | struct fw_card *card; |
97c18b7f SR |
116 | struct fw_request *request; |
117 | void *data; | |
118 | size_t length; | |
119 | }; | |
120 | ||
121 | struct descriptor_resource { | |
122 | struct client_resource resource; | |
123 | struct fw_descriptor descriptor; | |
124 | u32 data[0]; | |
125 | }; | |
126 | ||
b1bda4cd JFSR |
127 | struct iso_resource { |
128 | struct client_resource resource; | |
129 | struct client *client; | |
130 | /* Schedule work and access todo only with client->lock held. */ | |
131 | struct delayed_work work; | |
1ec3c026 SR |
132 | enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC, |
133 | ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo; | |
b1bda4cd JFSR |
134 | int generation; |
135 | u64 channels; | |
136 | s32 bandwidth; | |
6fdc0370 | 137 | __be32 transaction_data[2]; |
b1bda4cd JFSR |
138 | struct iso_resource_event *e_alloc, *e_dealloc; |
139 | }; | |
140 | ||
b1bda4cd JFSR |
141 | static void release_iso_resource(struct client *, struct client_resource *); |
142 | ||
9fb551bf SR |
143 | static void schedule_iso_resource(struct iso_resource *r, unsigned long delay) |
144 | { | |
145 | client_get(r->client); | |
146 | if (!schedule_delayed_work(&r->work, delay)) | |
147 | client_put(r->client); | |
148 | } | |
149 | ||
150 | static void schedule_if_iso_resource(struct client_resource *resource) | |
151 | { | |
152 | if (resource->release == release_iso_resource) | |
153 | schedule_iso_resource(container_of(resource, | |
154 | struct iso_resource, resource), 0); | |
155 | } | |
156 | ||
97c18b7f SR |
157 | /* |
158 | * dequeue_event() just kfree()'s the event, so the event has to be | |
159 | * the first field in a struct XYZ_event. | |
160 | */ | |
161 | struct event { | |
162 | struct { void *data; size_t size; } v[2]; | |
163 | struct list_head link; | |
164 | }; | |
165 | ||
166 | struct bus_reset_event { | |
167 | struct event event; | |
168 | struct fw_cdev_event_bus_reset reset; | |
169 | }; | |
170 | ||
171 | struct outbound_transaction_event { | |
172 | struct event event; | |
173 | struct client *client; | |
174 | struct outbound_transaction_resource r; | |
175 | struct fw_cdev_event_response response; | |
176 | }; | |
177 | ||
178 | struct inbound_transaction_event { | |
179 | struct event event; | |
e205597d SR |
180 | union { |
181 | struct fw_cdev_event_request request; | |
182 | struct fw_cdev_event_request2 request2; | |
183 | } req; | |
97c18b7f SR |
184 | }; |
185 | ||
186 | struct iso_interrupt_event { | |
187 | struct event event; | |
188 | struct fw_cdev_event_iso_interrupt interrupt; | |
189 | }; | |
190 | ||
b1bda4cd JFSR |
191 | struct iso_resource_event { |
192 | struct event event; | |
e21fcf79 | 193 | struct fw_cdev_event_iso_resource iso_resource; |
b1bda4cd JFSR |
194 | }; |
195 | ||
53dca511 | 196 | static inline void __user *u64_to_uptr(__u64 value) |
19a15b93 KH |
197 | { |
198 | return (void __user *)(unsigned long)value; | |
199 | } | |
200 | ||
53dca511 | 201 | static inline __u64 uptr_to_u64(void __user *ptr) |
19a15b93 KH |
202 | { |
203 | return (__u64)(unsigned long)ptr; | |
204 | } | |
205 | ||
206 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
207 | { | |
208 | struct fw_device *device; | |
209 | struct client *client; | |
210 | ||
96b19062 | 211 | device = fw_device_get_by_devt(inode->i_rdev); |
a3aca3da KH |
212 | if (device == NULL) |
213 | return -ENODEV; | |
19a15b93 | 214 | |
551f4cb9 JF |
215 | if (fw_device_is_shutdown(device)) { |
216 | fw_device_put(device); | |
217 | return -ENODEV; | |
218 | } | |
219 | ||
2d826cc5 | 220 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
96b19062 SR |
221 | if (client == NULL) { |
222 | fw_device_put(device); | |
19a15b93 | 223 | return -ENOMEM; |
96b19062 | 224 | } |
19a15b93 | 225 | |
96b19062 | 226 | client->device = device; |
19a15b93 | 227 | spin_lock_init(&client->lock); |
45ee3199 JF |
228 | idr_init(&client->resource_idr); |
229 | INIT_LIST_HEAD(&client->event_list); | |
19a15b93 | 230 | init_waitqueue_head(&client->wait); |
fb443036 | 231 | kref_init(&client->kref); |
19a15b93 KH |
232 | |
233 | file->private_data = client; | |
234 | ||
d67cfb96 | 235 | mutex_lock(&device->client_list_mutex); |
97bd9efa | 236 | list_add_tail(&client->link, &device->client_list); |
d67cfb96 | 237 | mutex_unlock(&device->client_list_mutex); |
97bd9efa | 238 | |
3ac26b2e | 239 | return nonseekable_open(inode, file); |
19a15b93 KH |
240 | } |
241 | ||
242 | static void queue_event(struct client *client, struct event *event, | |
243 | void *data0, size_t size0, void *data1, size_t size1) | |
244 | { | |
245 | unsigned long flags; | |
246 | ||
247 | event->v[0].data = data0; | |
248 | event->v[0].size = size0; | |
249 | event->v[1].data = data1; | |
250 | event->v[1].size = size1; | |
251 | ||
252 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
253 | if (client->in_shutdown) |
254 | kfree(event); | |
255 | else | |
256 | list_add_tail(&event->link, &client->event_list); | |
19a15b93 | 257 | spin_unlock_irqrestore(&client->lock, flags); |
83431cba JF |
258 | |
259 | wake_up_interruptible(&client->wait); | |
19a15b93 KH |
260 | } |
261 | ||
53dca511 SR |
262 | static int dequeue_event(struct client *client, |
263 | char __user *buffer, size_t count) | |
19a15b93 | 264 | { |
19a15b93 KH |
265 | struct event *event; |
266 | size_t size, total; | |
2dbd7d7e | 267 | int i, ret; |
19a15b93 | 268 | |
2dbd7d7e SR |
269 | ret = wait_event_interruptible(client->wait, |
270 | !list_empty(&client->event_list) || | |
271 | fw_device_is_shutdown(client->device)); | |
272 | if (ret < 0) | |
273 | return ret; | |
19a15b93 | 274 | |
2603bf21 KH |
275 | if (list_empty(&client->event_list) && |
276 | fw_device_is_shutdown(client->device)) | |
277 | return -ENODEV; | |
19a15b93 | 278 | |
3ba94986 | 279 | spin_lock_irq(&client->lock); |
a459b8ab | 280 | event = list_first_entry(&client->event_list, struct event, link); |
19a15b93 | 281 | list_del(&event->link); |
3ba94986 | 282 | spin_unlock_irq(&client->lock); |
19a15b93 | 283 | |
19a15b93 KH |
284 | total = 0; |
285 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
286 | size = min(event->v[i].size, count - total); | |
2603bf21 | 287 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
2dbd7d7e | 288 | ret = -EFAULT; |
19a15b93 | 289 | goto out; |
2603bf21 | 290 | } |
19a15b93 KH |
291 | total += size; |
292 | } | |
2dbd7d7e | 293 | ret = total; |
19a15b93 KH |
294 | |
295 | out: | |
296 | kfree(event); | |
297 | ||
2dbd7d7e | 298 | return ret; |
19a15b93 KH |
299 | } |
300 | ||
53dca511 SR |
301 | static ssize_t fw_device_op_read(struct file *file, char __user *buffer, |
302 | size_t count, loff_t *offset) | |
19a15b93 KH |
303 | { |
304 | struct client *client = file->private_data; | |
305 | ||
306 | return dequeue_event(client, buffer, count); | |
307 | } | |
308 | ||
53dca511 SR |
309 | static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, |
310 | struct client *client) | |
344bbc4d | 311 | { |
da8ecffa | 312 | struct fw_card *card = client->device->card; |
cf417e54 | 313 | |
3ba94986 | 314 | spin_lock_irq(&card->lock); |
344bbc4d | 315 | |
da8ecffa | 316 | event->closure = client->bus_reset_closure; |
344bbc4d | 317 | event->type = FW_CDEV_EVENT_BUS_RESET; |
cf5a56ac | 318 | event->generation = client->device->generation; |
da8ecffa | 319 | event->node_id = client->device->node_id; |
344bbc4d | 320 | event->local_node_id = card->local_node->node_id; |
250b2b6d | 321 | event->bm_node_id = card->bm_node_id; |
344bbc4d KH |
322 | event->irm_node_id = card->irm_node->node_id; |
323 | event->root_node_id = card->root_node->node_id; | |
cf417e54 | 324 | |
3ba94986 | 325 | spin_unlock_irq(&card->lock); |
344bbc4d KH |
326 | } |
327 | ||
53dca511 SR |
328 | static void for_each_client(struct fw_device *device, |
329 | void (*callback)(struct client *client)) | |
2603bf21 | 330 | { |
2603bf21 | 331 | struct client *c; |
2603bf21 | 332 | |
d67cfb96 | 333 | mutex_lock(&device->client_list_mutex); |
2603bf21 KH |
334 | list_for_each_entry(c, &device->client_list, link) |
335 | callback(c); | |
d67cfb96 | 336 | mutex_unlock(&device->client_list_mutex); |
2603bf21 KH |
337 | } |
338 | ||
b1bda4cd JFSR |
339 | static int schedule_reallocations(int id, void *p, void *data) |
340 | { | |
9fb551bf | 341 | schedule_if_iso_resource(p); |
b1bda4cd | 342 | |
b1bda4cd JFSR |
343 | return 0; |
344 | } | |
345 | ||
53dca511 | 346 | static void queue_bus_reset_event(struct client *client) |
97bd9efa | 347 | { |
97c18b7f | 348 | struct bus_reset_event *e; |
97bd9efa | 349 | |
97c18b7f SR |
350 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
351 | if (e == NULL) { | |
97bd9efa KH |
352 | fw_notify("Out of memory when allocating bus reset event\n"); |
353 | return; | |
354 | } | |
355 | ||
97c18b7f | 356 | fill_bus_reset_event(&e->reset, client); |
97bd9efa | 357 | |
97c18b7f SR |
358 | queue_event(client, &e->event, |
359 | &e->reset, sizeof(e->reset), NULL, 0); | |
b1bda4cd JFSR |
360 | |
361 | spin_lock_irq(&client->lock); | |
362 | idr_for_each(&client->resource_idr, schedule_reallocations, client); | |
363 | spin_unlock_irq(&client->lock); | |
97bd9efa KH |
364 | } |
365 | ||
366 | void fw_device_cdev_update(struct fw_device *device) | |
367 | { | |
2603bf21 KH |
368 | for_each_client(device, queue_bus_reset_event); |
369 | } | |
97bd9efa | 370 | |
2603bf21 KH |
371 | static void wake_up_client(struct client *client) |
372 | { | |
373 | wake_up_interruptible(&client->wait); | |
374 | } | |
97bd9efa | 375 | |
2603bf21 KH |
376 | void fw_device_cdev_remove(struct fw_device *device) |
377 | { | |
378 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
379 | } |
380 | ||
6e95dea7 SR |
381 | union ioctl_arg { |
382 | struct fw_cdev_get_info get_info; | |
383 | struct fw_cdev_send_request send_request; | |
384 | struct fw_cdev_allocate allocate; | |
385 | struct fw_cdev_deallocate deallocate; | |
386 | struct fw_cdev_send_response send_response; | |
387 | struct fw_cdev_initiate_bus_reset initiate_bus_reset; | |
388 | struct fw_cdev_add_descriptor add_descriptor; | |
389 | struct fw_cdev_remove_descriptor remove_descriptor; | |
390 | struct fw_cdev_create_iso_context create_iso_context; | |
391 | struct fw_cdev_queue_iso queue_iso; | |
392 | struct fw_cdev_start_iso start_iso; | |
393 | struct fw_cdev_stop_iso stop_iso; | |
394 | struct fw_cdev_get_cycle_timer get_cycle_timer; | |
395 | struct fw_cdev_allocate_iso_resource allocate_iso_resource; | |
396 | struct fw_cdev_send_stream_packet send_stream_packet; | |
397 | struct fw_cdev_get_cycle_timer2 get_cycle_timer2; | |
398 | }; | |
399 | ||
400 | static int ioctl_get_info(struct client *client, union ioctl_arg *arg) | |
19a15b93 | 401 | { |
6e95dea7 | 402 | struct fw_cdev_get_info *a = &arg->get_info; |
344bbc4d | 403 | struct fw_cdev_event_bus_reset bus_reset; |
c9755e14 | 404 | unsigned long ret = 0; |
344bbc4d | 405 | |
6e95dea7 | 406 | client->version = a->version; |
604f4516 | 407 | a->version = FW_CDEV_KERNEL_VERSION; |
6e95dea7 | 408 | a->card = client->device->card->index; |
344bbc4d | 409 | |
c9755e14 SR |
410 | down_read(&fw_device_rwsem); |
411 | ||
6e95dea7 SR |
412 | if (a->rom != 0) { |
413 | size_t want = a->rom_length; | |
d84702a5 | 414 | size_t have = client->device->config_rom_length * 4; |
344bbc4d | 415 | |
6e95dea7 SR |
416 | ret = copy_to_user(u64_to_uptr(a->rom), |
417 | client->device->config_rom, min(want, have)); | |
344bbc4d | 418 | } |
6e95dea7 | 419 | a->rom_length = client->device->config_rom_length * 4; |
344bbc4d | 420 | |
c9755e14 SR |
421 | up_read(&fw_device_rwsem); |
422 | ||
423 | if (ret != 0) | |
424 | return -EFAULT; | |
425 | ||
6e95dea7 SR |
426 | client->bus_reset_closure = a->bus_reset_closure; |
427 | if (a->bus_reset != 0) { | |
da8ecffa | 428 | fill_bus_reset_event(&bus_reset, client); |
6e95dea7 SR |
429 | if (copy_to_user(u64_to_uptr(a->bus_reset), |
430 | &bus_reset, sizeof(bus_reset))) | |
344bbc4d KH |
431 | return -EFAULT; |
432 | } | |
19a15b93 | 433 | |
19a15b93 KH |
434 | return 0; |
435 | } | |
436 | ||
53dca511 SR |
437 | static int add_client_resource(struct client *client, |
438 | struct client_resource *resource, gfp_t gfp_mask) | |
3964a449 KH |
439 | { |
440 | unsigned long flags; | |
45ee3199 JF |
441 | int ret; |
442 | ||
443 | retry: | |
444 | if (idr_pre_get(&client->resource_idr, gfp_mask) == 0) | |
445 | return -ENOMEM; | |
3964a449 KH |
446 | |
447 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
448 | if (client->in_shutdown) |
449 | ret = -ECANCELED; | |
450 | else | |
451 | ret = idr_get_new(&client->resource_idr, resource, | |
452 | &resource->handle); | |
b1bda4cd | 453 | if (ret >= 0) { |
fb443036 | 454 | client_get(client); |
9fb551bf | 455 | schedule_if_iso_resource(resource); |
b1bda4cd | 456 | } |
3964a449 | 457 | spin_unlock_irqrestore(&client->lock, flags); |
45ee3199 JF |
458 | |
459 | if (ret == -EAGAIN) | |
460 | goto retry; | |
461 | ||
462 | return ret < 0 ? ret : 0; | |
3964a449 KH |
463 | } |
464 | ||
53dca511 SR |
465 | static int release_client_resource(struct client *client, u32 handle, |
466 | client_resource_release_fn_t release, | |
e21fcf79 | 467 | struct client_resource **return_resource) |
3964a449 | 468 | { |
e21fcf79 | 469 | struct client_resource *resource; |
3964a449 | 470 | |
3ba94986 | 471 | spin_lock_irq(&client->lock); |
45ee3199 | 472 | if (client->in_shutdown) |
e21fcf79 | 473 | resource = NULL; |
45ee3199 | 474 | else |
e21fcf79 SR |
475 | resource = idr_find(&client->resource_idr, handle); |
476 | if (resource && resource->release == release) | |
45ee3199 | 477 | idr_remove(&client->resource_idr, handle); |
3ba94986 | 478 | spin_unlock_irq(&client->lock); |
3964a449 | 479 | |
e21fcf79 | 480 | if (!(resource && resource->release == release)) |
3964a449 KH |
481 | return -EINVAL; |
482 | ||
e21fcf79 SR |
483 | if (return_resource) |
484 | *return_resource = resource; | |
3964a449 | 485 | else |
e21fcf79 | 486 | resource->release(client, resource); |
3964a449 | 487 | |
fb443036 SR |
488 | client_put(client); |
489 | ||
3964a449 KH |
490 | return 0; |
491 | } | |
492 | ||
53dca511 SR |
493 | static void release_transaction(struct client *client, |
494 | struct client_resource *resource) | |
3964a449 | 495 | { |
97c18b7f SR |
496 | struct outbound_transaction_resource *r = container_of(resource, |
497 | struct outbound_transaction_resource, resource); | |
3964a449 | 498 | |
97c18b7f | 499 | fw_cancel_transaction(client->device->card, &r->transaction); |
3964a449 KH |
500 | } |
501 | ||
53dca511 SR |
502 | static void complete_transaction(struct fw_card *card, int rcode, |
503 | void *payload, size_t length, void *data) | |
19a15b93 | 504 | { |
97c18b7f SR |
505 | struct outbound_transaction_event *e = data; |
506 | struct fw_cdev_event_response *rsp = &e->response; | |
507 | struct client *client = e->client; | |
28cf6a04 | 508 | unsigned long flags; |
19a15b93 | 509 | |
97c18b7f SR |
510 | if (length < rsp->length) |
511 | rsp->length = length; | |
19a15b93 | 512 | if (rcode == RCODE_COMPLETE) |
97c18b7f | 513 | memcpy(rsp->data, payload, rsp->length); |
19a15b93 | 514 | |
28cf6a04 | 515 | spin_lock_irqsave(&client->lock, flags); |
45ee3199 | 516 | /* |
fb443036 SR |
517 | * 1. If called while in shutdown, the idr tree must be left untouched. |
518 | * The idr handle will be removed and the client reference will be | |
519 | * dropped later. | |
520 | * 2. If the call chain was release_client_resource -> | |
521 | * release_transaction -> complete_transaction (instead of a normal | |
522 | * conclusion of the transaction), i.e. if this resource was already | |
523 | * unregistered from the idr, the client reference will be dropped | |
524 | * by release_client_resource and we must not drop it here. | |
45ee3199 | 525 | */ |
fb443036 | 526 | if (!client->in_shutdown && |
97c18b7f SR |
527 | idr_find(&client->resource_idr, e->r.resource.handle)) { |
528 | idr_remove(&client->resource_idr, e->r.resource.handle); | |
fb443036 SR |
529 | /* Drop the idr's reference */ |
530 | client_put(client); | |
531 | } | |
28cf6a04 KH |
532 | spin_unlock_irqrestore(&client->lock, flags); |
533 | ||
97c18b7f SR |
534 | rsp->type = FW_CDEV_EVENT_RESPONSE; |
535 | rsp->rcode = rcode; | |
8401d92b DM |
536 | |
537 | /* | |
97c18b7f | 538 | * In the case that sizeof(*rsp) doesn't align with the position of the |
8401d92b DM |
539 | * data, and the read is short, preserve an extra copy of the data |
540 | * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless | |
541 | * for short reads and some apps depended on it, this is both safe | |
542 | * and prudent for compatibility. | |
543 | */ | |
97c18b7f SR |
544 | if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data)) |
545 | queue_event(client, &e->event, rsp, sizeof(*rsp), | |
546 | rsp->data, rsp->length); | |
8401d92b | 547 | else |
97c18b7f | 548 | queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length, |
8401d92b | 549 | NULL, 0); |
fb443036 SR |
550 | |
551 | /* Drop the transaction callback's reference */ | |
552 | client_put(client); | |
19a15b93 KH |
553 | } |
554 | ||
acfe8333 JFSR |
555 | static int init_request(struct client *client, |
556 | struct fw_cdev_send_request *request, | |
557 | int destination_id, int speed) | |
19a15b93 | 558 | { |
97c18b7f | 559 | struct outbound_transaction_event *e; |
1f3125af | 560 | int ret; |
19a15b93 | 561 | |
18e9b10f SR |
562 | if (request->tcode != TCODE_STREAM_DATA && |
563 | (request->length > 4096 || request->length > 512 << speed)) | |
5d3fd692 | 564 | return -EIO; |
19a15b93 | 565 | |
a8e93f3d CL |
566 | if (request->tcode == TCODE_WRITE_QUADLET_REQUEST && |
567 | request->length < 4) | |
568 | return -EINVAL; | |
569 | ||
97c18b7f SR |
570 | e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL); |
571 | if (e == NULL) | |
19a15b93 KH |
572 | return -ENOMEM; |
573 | ||
97c18b7f SR |
574 | e->client = client; |
575 | e->response.length = request->length; | |
576 | e->response.closure = request->closure; | |
19a15b93 | 577 | |
4f259223 | 578 | if (request->data && |
97c18b7f | 579 | copy_from_user(e->response.data, |
4f259223 | 580 | u64_to_uptr(request->data), request->length)) { |
1f3125af | 581 | ret = -EFAULT; |
45ee3199 | 582 | goto failed; |
1f3125af SR |
583 | } |
584 | ||
97c18b7f SR |
585 | e->r.resource.release = release_transaction; |
586 | ret = add_client_resource(client, &e->r.resource, GFP_KERNEL); | |
45ee3199 JF |
587 | if (ret < 0) |
588 | goto failed; | |
28cf6a04 | 589 | |
fb443036 SR |
590 | /* Get a reference for the transaction callback */ |
591 | client_get(client); | |
592 | ||
acfe8333 | 593 | fw_send_request(client->device->card, &e->r.transaction, |
664d8010 SR |
594 | request->tcode, destination_id, request->generation, |
595 | speed, request->offset, e->response.data, | |
596 | request->length, complete_transaction, e); | |
597 | return 0; | |
19a15b93 | 598 | |
45ee3199 | 599 | failed: |
97c18b7f | 600 | kfree(e); |
1f3125af SR |
601 | |
602 | return ret; | |
19a15b93 KH |
603 | } |
604 | ||
6e95dea7 | 605 | static int ioctl_send_request(struct client *client, union ioctl_arg *arg) |
acfe8333 | 606 | { |
6e95dea7 | 607 | switch (arg->send_request.tcode) { |
acfe8333 JFSR |
608 | case TCODE_WRITE_QUADLET_REQUEST: |
609 | case TCODE_WRITE_BLOCK_REQUEST: | |
610 | case TCODE_READ_QUADLET_REQUEST: | |
611 | case TCODE_READ_BLOCK_REQUEST: | |
612 | case TCODE_LOCK_MASK_SWAP: | |
613 | case TCODE_LOCK_COMPARE_SWAP: | |
614 | case TCODE_LOCK_FETCH_ADD: | |
615 | case TCODE_LOCK_LITTLE_ADD: | |
616 | case TCODE_LOCK_BOUNDED_ADD: | |
617 | case TCODE_LOCK_WRAP_ADD: | |
618 | case TCODE_LOCK_VENDOR_DEPENDENT: | |
619 | break; | |
620 | default: | |
621 | return -EINVAL; | |
622 | } | |
623 | ||
6e95dea7 | 624 | return init_request(client, &arg->send_request, client->device->node_id, |
acfe8333 JFSR |
625 | client->device->max_speed); |
626 | } | |
627 | ||
281e2032 SR |
628 | static inline bool is_fcp_request(struct fw_request *request) |
629 | { | |
630 | return request == NULL; | |
631 | } | |
632 | ||
53dca511 SR |
633 | static void release_request(struct client *client, |
634 | struct client_resource *resource) | |
3964a449 | 635 | { |
97c18b7f SR |
636 | struct inbound_transaction_resource *r = container_of(resource, |
637 | struct inbound_transaction_resource, resource); | |
3964a449 | 638 | |
281e2032 SR |
639 | if (is_fcp_request(r->request)) |
640 | kfree(r->data); | |
641 | else | |
08bd34c9 | 642 | fw_send_response(r->card, r->request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
643 | |
644 | fw_card_put(r->card); | |
97c18b7f | 645 | kfree(r); |
3964a449 KH |
646 | } |
647 | ||
97c18b7f | 648 | static void handle_request(struct fw_card *card, struct fw_request *request, |
53dca511 | 649 | int tcode, int destination, int source, |
33e553fe | 650 | int generation, unsigned long long offset, |
53dca511 | 651 | void *payload, size_t length, void *callback_data) |
19a15b93 | 652 | { |
97c18b7f SR |
653 | struct address_handler_resource *handler = callback_data; |
654 | struct inbound_transaction_resource *r; | |
655 | struct inbound_transaction_event *e; | |
e205597d | 656 | size_t event_size0; |
281e2032 | 657 | void *fcp_frame = NULL; |
45ee3199 | 658 | int ret; |
19a15b93 | 659 | |
0244f573 SR |
660 | /* card may be different from handler->client->device->card */ |
661 | fw_card_get(card); | |
662 | ||
97c18b7f | 663 | r = kmalloc(sizeof(*r), GFP_ATOMIC); |
2d826cc5 | 664 | e = kmalloc(sizeof(*e), GFP_ATOMIC); |
97c18b7f | 665 | if (r == NULL || e == NULL) |
45ee3199 | 666 | goto failed; |
19a15b93 | 667 | |
08bd34c9 | 668 | r->card = card; |
97c18b7f SR |
669 | r->request = request; |
670 | r->data = payload; | |
671 | r->length = length; | |
19a15b93 | 672 | |
281e2032 SR |
673 | if (is_fcp_request(request)) { |
674 | /* | |
675 | * FIXME: Let core-transaction.c manage a | |
676 | * single reference-counted copy? | |
677 | */ | |
678 | fcp_frame = kmemdup(payload, length, GFP_ATOMIC); | |
679 | if (fcp_frame == NULL) | |
680 | goto failed; | |
681 | ||
682 | r->data = fcp_frame; | |
683 | } | |
684 | ||
97c18b7f SR |
685 | r->resource.release = release_request; |
686 | ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC); | |
45ee3199 JF |
687 | if (ret < 0) |
688 | goto failed; | |
19a15b93 | 689 | |
e205597d SR |
690 | if (handler->client->version < FW_CDEV_VERSION_EVENT_REQUEST2) { |
691 | struct fw_cdev_event_request *req = &e->req.request; | |
692 | ||
693 | if (tcode & 0x10) | |
694 | tcode = TCODE_LOCK_REQUEST; | |
695 | ||
696 | req->type = FW_CDEV_EVENT_REQUEST; | |
697 | req->tcode = tcode; | |
698 | req->offset = offset; | |
699 | req->length = length; | |
700 | req->handle = r->resource.handle; | |
701 | req->closure = handler->closure; | |
702 | event_size0 = sizeof(*req); | |
703 | } else { | |
704 | struct fw_cdev_event_request2 *req = &e->req.request2; | |
705 | ||
706 | req->type = FW_CDEV_EVENT_REQUEST2; | |
707 | req->tcode = tcode; | |
708 | req->offset = offset; | |
709 | req->source_node_id = source; | |
710 | req->destination_node_id = destination; | |
711 | req->card = card->index; | |
712 | req->generation = generation; | |
713 | req->length = length; | |
714 | req->handle = r->resource.handle; | |
715 | req->closure = handler->closure; | |
716 | event_size0 = sizeof(*req); | |
717 | } | |
19a15b93 | 718 | |
97c18b7f | 719 | queue_event(handler->client, &e->event, |
e205597d | 720 | &e->req, event_size0, r->data, length); |
45ee3199 JF |
721 | return; |
722 | ||
723 | failed: | |
97c18b7f | 724 | kfree(r); |
45ee3199 | 725 | kfree(e); |
281e2032 SR |
726 | kfree(fcp_frame); |
727 | ||
728 | if (!is_fcp_request(request)) | |
db5d247a | 729 | fw_send_response(card, request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
730 | |
731 | fw_card_put(card); | |
19a15b93 KH |
732 | } |
733 | ||
53dca511 SR |
734 | static void release_address_handler(struct client *client, |
735 | struct client_resource *resource) | |
3964a449 | 736 | { |
97c18b7f SR |
737 | struct address_handler_resource *r = |
738 | container_of(resource, struct address_handler_resource, resource); | |
3964a449 | 739 | |
97c18b7f SR |
740 | fw_core_remove_address_handler(&r->handler); |
741 | kfree(r); | |
3964a449 KH |
742 | } |
743 | ||
6e95dea7 | 744 | static int ioctl_allocate(struct client *client, union ioctl_arg *arg) |
19a15b93 | 745 | { |
6e95dea7 | 746 | struct fw_cdev_allocate *a = &arg->allocate; |
97c18b7f | 747 | struct address_handler_resource *r; |
19a15b93 | 748 | struct fw_address_region region; |
45ee3199 | 749 | int ret; |
19a15b93 | 750 | |
97c18b7f SR |
751 | r = kmalloc(sizeof(*r), GFP_KERNEL); |
752 | if (r == NULL) | |
19a15b93 KH |
753 | return -ENOMEM; |
754 | ||
6e95dea7 SR |
755 | region.start = a->offset; |
756 | region.end = a->offset + a->length; | |
757 | r->handler.length = a->length; | |
97c18b7f | 758 | r->handler.address_callback = handle_request; |
6e95dea7 SR |
759 | r->handler.callback_data = r; |
760 | r->closure = a->closure; | |
761 | r->client = client; | |
19a15b93 | 762 | |
97c18b7f | 763 | ret = fw_core_add_address_handler(&r->handler, ®ion); |
3e0b5f0d | 764 | if (ret < 0) { |
97c18b7f | 765 | kfree(r); |
3e0b5f0d | 766 | return ret; |
19a15b93 KH |
767 | } |
768 | ||
97c18b7f SR |
769 | r->resource.release = release_address_handler; |
770 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 771 | if (ret < 0) { |
97c18b7f | 772 | release_address_handler(client, &r->resource); |
45ee3199 JF |
773 | return ret; |
774 | } | |
6e95dea7 | 775 | a->handle = r->resource.handle; |
19a15b93 KH |
776 | |
777 | return 0; | |
778 | } | |
779 | ||
6e95dea7 | 780 | static int ioctl_deallocate(struct client *client, union ioctl_arg *arg) |
9472316b | 781 | { |
6e95dea7 | 782 | return release_client_resource(client, arg->deallocate.handle, |
45ee3199 | 783 | release_address_handler, NULL); |
9472316b KH |
784 | } |
785 | ||
6e95dea7 | 786 | static int ioctl_send_response(struct client *client, union ioctl_arg *arg) |
19a15b93 | 787 | { |
6e95dea7 | 788 | struct fw_cdev_send_response *a = &arg->send_response; |
3964a449 | 789 | struct client_resource *resource; |
97c18b7f | 790 | struct inbound_transaction_resource *r; |
7e44c0b5 | 791 | int ret = 0; |
19a15b93 | 792 | |
6e95dea7 | 793 | if (release_client_resource(client, a->handle, |
45ee3199 | 794 | release_request, &resource) < 0) |
19a15b93 | 795 | return -EINVAL; |
45ee3199 | 796 | |
97c18b7f SR |
797 | r = container_of(resource, struct inbound_transaction_resource, |
798 | resource); | |
281e2032 SR |
799 | if (is_fcp_request(r->request)) |
800 | goto out; | |
801 | ||
a10c0ce7 CL |
802 | if (a->length != fw_get_response_length(r->request)) { |
803 | ret = -EINVAL; | |
804 | kfree(r->request); | |
805 | goto out; | |
806 | } | |
807 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length)) { | |
281e2032 SR |
808 | ret = -EFAULT; |
809 | kfree(r->request); | |
810 | goto out; | |
7e44c0b5 | 811 | } |
08bd34c9 | 812 | fw_send_response(r->card, r->request, a->rcode); |
7e44c0b5 | 813 | out: |
0244f573 | 814 | fw_card_put(r->card); |
19a15b93 KH |
815 | kfree(r); |
816 | ||
7e44c0b5 | 817 | return ret; |
19a15b93 KH |
818 | } |
819 | ||
6e95dea7 | 820 | static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg) |
5371842b | 821 | { |
6e95dea7 SR |
822 | return fw_core_initiate_bus_reset(client->device->card, |
823 | arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET); | |
5371842b KH |
824 | } |
825 | ||
3964a449 KH |
826 | static void release_descriptor(struct client *client, |
827 | struct client_resource *resource) | |
828 | { | |
97c18b7f SR |
829 | struct descriptor_resource *r = |
830 | container_of(resource, struct descriptor_resource, resource); | |
3964a449 | 831 | |
97c18b7f SR |
832 | fw_core_remove_descriptor(&r->descriptor); |
833 | kfree(r); | |
3964a449 KH |
834 | } |
835 | ||
6e95dea7 | 836 | static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 837 | { |
6e95dea7 | 838 | struct fw_cdev_add_descriptor *a = &arg->add_descriptor; |
97c18b7f | 839 | struct descriptor_resource *r; |
45ee3199 | 840 | int ret; |
66dea3e5 | 841 | |
de487da8 | 842 | /* Access policy: Allow this ioctl only on local nodes' device files. */ |
92368890 | 843 | if (!client->device->is_local) |
de487da8 SR |
844 | return -ENOSYS; |
845 | ||
6e95dea7 | 846 | if (a->length > 256) |
66dea3e5 KH |
847 | return -EINVAL; |
848 | ||
6e95dea7 | 849 | r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL); |
97c18b7f | 850 | if (r == NULL) |
66dea3e5 KH |
851 | return -ENOMEM; |
852 | ||
6e95dea7 | 853 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) { |
45ee3199 JF |
854 | ret = -EFAULT; |
855 | goto failed; | |
66dea3e5 KH |
856 | } |
857 | ||
6e95dea7 SR |
858 | r->descriptor.length = a->length; |
859 | r->descriptor.immediate = a->immediate; | |
860 | r->descriptor.key = a->key; | |
97c18b7f | 861 | r->descriptor.data = r->data; |
66dea3e5 | 862 | |
97c18b7f | 863 | ret = fw_core_add_descriptor(&r->descriptor); |
45ee3199 JF |
864 | if (ret < 0) |
865 | goto failed; | |
66dea3e5 | 866 | |
97c18b7f SR |
867 | r->resource.release = release_descriptor; |
868 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 869 | if (ret < 0) { |
97c18b7f | 870 | fw_core_remove_descriptor(&r->descriptor); |
45ee3199 JF |
871 | goto failed; |
872 | } | |
6e95dea7 | 873 | a->handle = r->resource.handle; |
66dea3e5 KH |
874 | |
875 | return 0; | |
45ee3199 | 876 | failed: |
97c18b7f | 877 | kfree(r); |
45ee3199 JF |
878 | |
879 | return ret; | |
66dea3e5 KH |
880 | } |
881 | ||
6e95dea7 | 882 | static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 883 | { |
6e95dea7 | 884 | return release_client_resource(client, arg->remove_descriptor.handle, |
45ee3199 | 885 | release_descriptor, NULL); |
66dea3e5 KH |
886 | } |
887 | ||
53dca511 SR |
888 | static void iso_callback(struct fw_iso_context *context, u32 cycle, |
889 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
890 | { |
891 | struct client *client = data; | |
97c18b7f | 892 | struct iso_interrupt_event *e; |
19a15b93 | 893 | |
56d04cb1 | 894 | e = kmalloc(sizeof(*e) + header_length, GFP_ATOMIC); |
97c18b7f | 895 | if (e == NULL) |
19a15b93 KH |
896 | return; |
897 | ||
97c18b7f SR |
898 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
899 | e->interrupt.closure = client->iso_closure; | |
900 | e->interrupt.cycle = cycle; | |
901 | e->interrupt.header_length = header_length; | |
902 | memcpy(e->interrupt.header, header, header_length); | |
903 | queue_event(client, &e->event, &e->interrupt, | |
904 | sizeof(e->interrupt) + header_length, NULL, 0); | |
19a15b93 KH |
905 | } |
906 | ||
6e95dea7 | 907 | static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) |
19a15b93 | 908 | { |
6e95dea7 | 909 | struct fw_cdev_create_iso_context *a = &arg->create_iso_context; |
24315c5e | 910 | struct fw_iso_context *context; |
19a15b93 | 911 | |
6e95dea7 | 912 | if (a->channel > 63) |
21efb3cf KH |
913 | return -EINVAL; |
914 | ||
6e95dea7 | 915 | switch (a->type) { |
c70dc788 | 916 | case FW_ISO_CONTEXT_RECEIVE: |
6e95dea7 | 917 | if (a->header_size < 4 || (a->header_size & 3)) |
c70dc788 | 918 | return -EINVAL; |
c70dc788 KH |
919 | break; |
920 | ||
921 | case FW_ISO_CONTEXT_TRANSMIT: | |
6e95dea7 | 922 | if (a->speed > SCODE_3200) |
c70dc788 | 923 | return -EINVAL; |
c70dc788 KH |
924 | break; |
925 | ||
926 | default: | |
21efb3cf | 927 | return -EINVAL; |
c70dc788 KH |
928 | } |
929 | ||
6e95dea7 SR |
930 | context = fw_iso_context_create(client->device->card, a->type, |
931 | a->channel, a->speed, a->header_size, | |
932 | iso_callback, client); | |
24315c5e KH |
933 | if (IS_ERR(context)) |
934 | return PTR_ERR(context); | |
935 | ||
bdfe273e CL |
936 | /* We only support one context at this time. */ |
937 | spin_lock_irq(&client->lock); | |
938 | if (client->iso_context != NULL) { | |
939 | spin_unlock_irq(&client->lock); | |
940 | fw_iso_context_destroy(context); | |
941 | return -EBUSY; | |
942 | } | |
6e95dea7 | 943 | client->iso_closure = a->closure; |
24315c5e | 944 | client->iso_context = context; |
bdfe273e | 945 | spin_unlock_irq(&client->lock); |
19a15b93 | 946 | |
6e95dea7 | 947 | a->handle = 0; |
abaa5743 | 948 | |
19a15b93 KH |
949 | return 0; |
950 | } | |
951 | ||
1ca31ae7 KH |
952 | /* Macros for decoding the iso packet control header. */ |
953 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) | |
954 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) | |
955 | #define GET_SKIP(v) (((v) >> 17) & 0x01) | |
7a100344 SR |
956 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
957 | #define GET_SY(v) (((v) >> 20) & 0x0f) | |
1ca31ae7 KH |
958 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
959 | ||
6e95dea7 | 960 | static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 961 | { |
6e95dea7 | 962 | struct fw_cdev_queue_iso *a = &arg->queue_iso; |
19a15b93 | 963 | struct fw_cdev_iso_packet __user *p, *end, *next; |
9b32d5f3 | 964 | struct fw_iso_context *ctx = client->iso_context; |
ef370ee7 | 965 | unsigned long payload, buffer_end, header_length; |
1ca31ae7 | 966 | u32 control; |
19a15b93 KH |
967 | int count; |
968 | struct { | |
969 | struct fw_iso_packet packet; | |
970 | u8 header[256]; | |
971 | } u; | |
972 | ||
6e95dea7 | 973 | if (ctx == NULL || a->handle != 0) |
19a15b93 | 974 | return -EINVAL; |
19a15b93 | 975 | |
c781c06d KH |
976 | /* |
977 | * If the user passes a non-NULL data pointer, has mmap()'ed | |
19a15b93 KH |
978 | * the iso buffer, and the pointer points inside the buffer, |
979 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 980 | * set them both to 0, which will still let packets with |
19a15b93 KH |
981 | * payload_length == 0 through. In other words, if no packets |
982 | * use the indirect payload, the iso buffer need not be mapped | |
6e95dea7 | 983 | * and the a->data pointer is ignored. |
c781c06d | 984 | */ |
19a15b93 | 985 | |
6e95dea7 | 986 | payload = (unsigned long)a->data - client->vm_start; |
ef370ee7 | 987 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
6e95dea7 | 988 | if (a->data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 989 | payload >= buffer_end) { |
9aad8125 | 990 | payload = 0; |
ef370ee7 | 991 | buffer_end = 0; |
19a15b93 KH |
992 | } |
993 | ||
6e95dea7 | 994 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets); |
1ccc9147 | 995 | |
6e95dea7 | 996 | if (!access_ok(VERIFY_READ, p, a->size)) |
19a15b93 KH |
997 | return -EFAULT; |
998 | ||
6e95dea7 | 999 | end = (void __user *)p + a->size; |
19a15b93 KH |
1000 | count = 0; |
1001 | while (p < end) { | |
1ca31ae7 | 1002 | if (get_user(control, &p->control)) |
19a15b93 | 1003 | return -EFAULT; |
1ca31ae7 KH |
1004 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
1005 | u.packet.interrupt = GET_INTERRUPT(control); | |
1006 | u.packet.skip = GET_SKIP(control); | |
1007 | u.packet.tag = GET_TAG(control); | |
1008 | u.packet.sy = GET_SY(control); | |
1009 | u.packet.header_length = GET_HEADER_LENGTH(control); | |
295e3feb | 1010 | |
9b32d5f3 | 1011 | if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) { |
385ab5bc CL |
1012 | if (u.packet.header_length % 4 != 0) |
1013 | return -EINVAL; | |
295e3feb KH |
1014 | header_length = u.packet.header_length; |
1015 | } else { | |
c781c06d KH |
1016 | /* |
1017 | * We require that header_length is a multiple of | |
1018 | * the fixed header size, ctx->header_size. | |
1019 | */ | |
9b32d5f3 KH |
1020 | if (ctx->header_size == 0) { |
1021 | if (u.packet.header_length > 0) | |
1022 | return -EINVAL; | |
4ba1d9c0 CL |
1023 | } else if (u.packet.header_length == 0 || |
1024 | u.packet.header_length % ctx->header_size != 0) { | |
295e3feb | 1025 | return -EINVAL; |
9b32d5f3 | 1026 | } |
295e3feb KH |
1027 | header_length = 0; |
1028 | } | |
1029 | ||
19a15b93 | 1030 | next = (struct fw_cdev_iso_packet __user *) |
295e3feb | 1031 | &p->header[header_length / 4]; |
19a15b93 KH |
1032 | if (next > end) |
1033 | return -EINVAL; | |
1034 | if (__copy_from_user | |
295e3feb | 1035 | (u.packet.header, p->header, header_length)) |
19a15b93 | 1036 | return -EFAULT; |
98b6cbe8 | 1037 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
1038 | u.packet.header_length + u.packet.payload_length > 0) |
1039 | return -EINVAL; | |
ef370ee7 | 1040 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
1041 | return -EINVAL; |
1042 | ||
9b32d5f3 KH |
1043 | if (fw_iso_context_queue(ctx, &u.packet, |
1044 | &client->buffer, payload)) | |
19a15b93 KH |
1045 | break; |
1046 | ||
1047 | p = next; | |
1048 | payload += u.packet.payload_length; | |
1049 | count++; | |
1050 | } | |
1051 | ||
6e95dea7 SR |
1052 | a->size -= uptr_to_u64(p) - a->packets; |
1053 | a->packets = uptr_to_u64(p); | |
1054 | a->data = client->vm_start + payload; | |
19a15b93 KH |
1055 | |
1056 | return count; | |
1057 | } | |
1058 | ||
6e95dea7 | 1059 | static int ioctl_start_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1060 | { |
6e95dea7 | 1061 | struct fw_cdev_start_iso *a = &arg->start_iso; |
19a15b93 | 1062 | |
6e95dea7 | 1063 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 | 1064 | return -EINVAL; |
fae60312 | 1065 | |
6e95dea7 SR |
1066 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE && |
1067 | (a->tags == 0 || a->tags > 15 || a->sync > 15)) | |
1068 | return -EINVAL; | |
eb0306ea | 1069 | |
6e95dea7 SR |
1070 | return fw_iso_context_start(client->iso_context, |
1071 | a->cycle, a->sync, a->tags); | |
19a15b93 KH |
1072 | } |
1073 | ||
6e95dea7 | 1074 | static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg) |
b8295668 | 1075 | { |
6e95dea7 | 1076 | struct fw_cdev_stop_iso *a = &arg->stop_iso; |
abaa5743 | 1077 | |
6e95dea7 | 1078 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 KH |
1079 | return -EINVAL; |
1080 | ||
b8295668 KH |
1081 | return fw_iso_context_stop(client->iso_context); |
1082 | } | |
1083 | ||
6e95dea7 | 1084 | static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg) |
a64408b9 | 1085 | { |
6e95dea7 | 1086 | struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2; |
a64408b9 | 1087 | struct fw_card *card = client->device->card; |
abfe5a01 | 1088 | struct timespec ts = {0, 0}; |
4a9bde9b | 1089 | u32 cycle_time; |
abfe5a01 | 1090 | int ret = 0; |
a64408b9 | 1091 | |
4a9bde9b | 1092 | local_irq_disable(); |
a64408b9 | 1093 | |
0fcff4e3 | 1094 | cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME); |
abfe5a01 | 1095 | |
6e95dea7 | 1096 | switch (a->clk_id) { |
abfe5a01 SR |
1097 | case CLOCK_REALTIME: getnstimeofday(&ts); break; |
1098 | case CLOCK_MONOTONIC: do_posix_clock_monotonic_gettime(&ts); break; | |
1099 | case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts); break; | |
1100 | default: | |
1101 | ret = -EINVAL; | |
1102 | } | |
a64408b9 | 1103 | |
4a9bde9b | 1104 | local_irq_enable(); |
a64408b9 | 1105 | |
6e95dea7 SR |
1106 | a->tv_sec = ts.tv_sec; |
1107 | a->tv_nsec = ts.tv_nsec; | |
1108 | a->cycle_timer = cycle_time; | |
abfe5a01 SR |
1109 | |
1110 | return ret; | |
1111 | } | |
1112 | ||
6e95dea7 | 1113 | static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg) |
abfe5a01 | 1114 | { |
6e95dea7 | 1115 | struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer; |
abfe5a01 SR |
1116 | struct fw_cdev_get_cycle_timer2 ct2; |
1117 | ||
1118 | ct2.clk_id = CLOCK_REALTIME; | |
6e95dea7 | 1119 | ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2); |
abfe5a01 | 1120 | |
6e95dea7 SR |
1121 | a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC; |
1122 | a->cycle_timer = ct2.cycle_timer; | |
4a9bde9b | 1123 | |
a64408b9 SR |
1124 | return 0; |
1125 | } | |
1126 | ||
b1bda4cd JFSR |
1127 | static void iso_resource_work(struct work_struct *work) |
1128 | { | |
1129 | struct iso_resource_event *e; | |
1130 | struct iso_resource *r = | |
1131 | container_of(work, struct iso_resource, work.work); | |
1132 | struct client *client = r->client; | |
1133 | int generation, channel, bandwidth, todo; | |
1134 | bool skip, free, success; | |
1135 | ||
1136 | spin_lock_irq(&client->lock); | |
1137 | generation = client->device->generation; | |
1138 | todo = r->todo; | |
1139 | /* Allow 1000ms grace period for other reallocations. */ | |
1140 | if (todo == ISO_RES_ALLOC && | |
1141 | time_is_after_jiffies(client->device->card->reset_jiffies + HZ)) { | |
9fb551bf | 1142 | schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3)); |
b1bda4cd JFSR |
1143 | skip = true; |
1144 | } else { | |
1145 | /* We could be called twice within the same generation. */ | |
1146 | skip = todo == ISO_RES_REALLOC && | |
1147 | r->generation == generation; | |
1148 | } | |
1ec3c026 SR |
1149 | free = todo == ISO_RES_DEALLOC || |
1150 | todo == ISO_RES_ALLOC_ONCE || | |
1151 | todo == ISO_RES_DEALLOC_ONCE; | |
b1bda4cd JFSR |
1152 | r->generation = generation; |
1153 | spin_unlock_irq(&client->lock); | |
1154 | ||
1155 | if (skip) | |
1156 | goto out; | |
1157 | ||
1158 | bandwidth = r->bandwidth; | |
1159 | ||
1160 | fw_iso_resource_manage(client->device->card, generation, | |
1161 | r->channels, &channel, &bandwidth, | |
1ec3c026 SR |
1162 | todo == ISO_RES_ALLOC || |
1163 | todo == ISO_RES_REALLOC || | |
6fdc0370 SR |
1164 | todo == ISO_RES_ALLOC_ONCE, |
1165 | r->transaction_data); | |
b1bda4cd JFSR |
1166 | /* |
1167 | * Is this generation outdated already? As long as this resource sticks | |
1168 | * in the idr, it will be scheduled again for a newer generation or at | |
1169 | * shutdown. | |
1170 | */ | |
1171 | if (channel == -EAGAIN && | |
1172 | (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC)) | |
1173 | goto out; | |
1174 | ||
1175 | success = channel >= 0 || bandwidth > 0; | |
1176 | ||
1177 | spin_lock_irq(&client->lock); | |
1178 | /* | |
1179 | * Transit from allocation to reallocation, except if the client | |
1180 | * requested deallocation in the meantime. | |
1181 | */ | |
1182 | if (r->todo == ISO_RES_ALLOC) | |
1183 | r->todo = ISO_RES_REALLOC; | |
1184 | /* | |
1185 | * Allocation or reallocation failure? Pull this resource out of the | |
1186 | * idr and prepare for deletion, unless the client is shutting down. | |
1187 | */ | |
1188 | if (r->todo == ISO_RES_REALLOC && !success && | |
1189 | !client->in_shutdown && | |
1190 | idr_find(&client->resource_idr, r->resource.handle)) { | |
1191 | idr_remove(&client->resource_idr, r->resource.handle); | |
1192 | client_put(client); | |
1193 | free = true; | |
1194 | } | |
1195 | spin_unlock_irq(&client->lock); | |
1196 | ||
1197 | if (todo == ISO_RES_ALLOC && channel >= 0) | |
5d9cb7d2 | 1198 | r->channels = 1ULL << channel; |
b1bda4cd JFSR |
1199 | |
1200 | if (todo == ISO_RES_REALLOC && success) | |
1201 | goto out; | |
1202 | ||
1ec3c026 | 1203 | if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) { |
b1bda4cd JFSR |
1204 | e = r->e_alloc; |
1205 | r->e_alloc = NULL; | |
1206 | } else { | |
1207 | e = r->e_dealloc; | |
1208 | r->e_dealloc = NULL; | |
1209 | } | |
e21fcf79 SR |
1210 | e->iso_resource.handle = r->resource.handle; |
1211 | e->iso_resource.channel = channel; | |
1212 | e->iso_resource.bandwidth = bandwidth; | |
b1bda4cd JFSR |
1213 | |
1214 | queue_event(client, &e->event, | |
e21fcf79 | 1215 | &e->iso_resource, sizeof(e->iso_resource), NULL, 0); |
b1bda4cd JFSR |
1216 | |
1217 | if (free) { | |
1218 | cancel_delayed_work(&r->work); | |
1219 | kfree(r->e_alloc); | |
1220 | kfree(r->e_dealloc); | |
1221 | kfree(r); | |
1222 | } | |
1223 | out: | |
1224 | client_put(client); | |
1225 | } | |
1226 | ||
b1bda4cd JFSR |
1227 | static void release_iso_resource(struct client *client, |
1228 | struct client_resource *resource) | |
1229 | { | |
1230 | struct iso_resource *r = | |
1231 | container_of(resource, struct iso_resource, resource); | |
1232 | ||
1233 | spin_lock_irq(&client->lock); | |
1234 | r->todo = ISO_RES_DEALLOC; | |
9fb551bf | 1235 | schedule_iso_resource(r, 0); |
b1bda4cd JFSR |
1236 | spin_unlock_irq(&client->lock); |
1237 | } | |
1238 | ||
1ec3c026 SR |
1239 | static int init_iso_resource(struct client *client, |
1240 | struct fw_cdev_allocate_iso_resource *request, int todo) | |
b1bda4cd | 1241 | { |
b1bda4cd JFSR |
1242 | struct iso_resource_event *e1, *e2; |
1243 | struct iso_resource *r; | |
1244 | int ret; | |
1245 | ||
1246 | if ((request->channels == 0 && request->bandwidth == 0) || | |
1247 | request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL || | |
1248 | request->bandwidth < 0) | |
1249 | return -EINVAL; | |
1250 | ||
1251 | r = kmalloc(sizeof(*r), GFP_KERNEL); | |
1252 | e1 = kmalloc(sizeof(*e1), GFP_KERNEL); | |
1253 | e2 = kmalloc(sizeof(*e2), GFP_KERNEL); | |
1254 | if (r == NULL || e1 == NULL || e2 == NULL) { | |
1255 | ret = -ENOMEM; | |
1256 | goto fail; | |
1257 | } | |
1258 | ||
1259 | INIT_DELAYED_WORK(&r->work, iso_resource_work); | |
1260 | r->client = client; | |
1ec3c026 | 1261 | r->todo = todo; |
b1bda4cd JFSR |
1262 | r->generation = -1; |
1263 | r->channels = request->channels; | |
1264 | r->bandwidth = request->bandwidth; | |
1265 | r->e_alloc = e1; | |
1266 | r->e_dealloc = e2; | |
1267 | ||
e21fcf79 SR |
1268 | e1->iso_resource.closure = request->closure; |
1269 | e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED; | |
1270 | e2->iso_resource.closure = request->closure; | |
1271 | e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED; | |
b1bda4cd | 1272 | |
1ec3c026 SR |
1273 | if (todo == ISO_RES_ALLOC) { |
1274 | r->resource.release = release_iso_resource; | |
1275 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
81610b8f SR |
1276 | if (ret < 0) |
1277 | goto fail; | |
1ec3c026 SR |
1278 | } else { |
1279 | r->resource.release = NULL; | |
1280 | r->resource.handle = -1; | |
9fb551bf | 1281 | schedule_iso_resource(r, 0); |
1ec3c026 | 1282 | } |
b1bda4cd JFSR |
1283 | request->handle = r->resource.handle; |
1284 | ||
1285 | return 0; | |
1286 | fail: | |
1287 | kfree(r); | |
1288 | kfree(e1); | |
1289 | kfree(e2); | |
1290 | ||
1291 | return ret; | |
1292 | } | |
1293 | ||
6e95dea7 SR |
1294 | static int ioctl_allocate_iso_resource(struct client *client, |
1295 | union ioctl_arg *arg) | |
1ec3c026 | 1296 | { |
6e95dea7 SR |
1297 | return init_iso_resource(client, |
1298 | &arg->allocate_iso_resource, ISO_RES_ALLOC); | |
1ec3c026 SR |
1299 | } |
1300 | ||
6e95dea7 SR |
1301 | static int ioctl_deallocate_iso_resource(struct client *client, |
1302 | union ioctl_arg *arg) | |
b1bda4cd | 1303 | { |
6e95dea7 SR |
1304 | return release_client_resource(client, |
1305 | arg->deallocate.handle, release_iso_resource, NULL); | |
b1bda4cd JFSR |
1306 | } |
1307 | ||
6e95dea7 SR |
1308 | static int ioctl_allocate_iso_resource_once(struct client *client, |
1309 | union ioctl_arg *arg) | |
1ec3c026 | 1310 | { |
6e95dea7 SR |
1311 | return init_iso_resource(client, |
1312 | &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE); | |
1ec3c026 SR |
1313 | } |
1314 | ||
6e95dea7 SR |
1315 | static int ioctl_deallocate_iso_resource_once(struct client *client, |
1316 | union ioctl_arg *arg) | |
1ec3c026 | 1317 | { |
6e95dea7 SR |
1318 | return init_iso_resource(client, |
1319 | &arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE); | |
1ec3c026 SR |
1320 | } |
1321 | ||
c8a25900 SR |
1322 | /* |
1323 | * Returns a speed code: Maximum speed to or from this device, | |
1324 | * limited by the device's link speed, the local node's link speed, | |
1325 | * and all PHY port speeds between the two links. | |
1326 | */ | |
6e95dea7 | 1327 | static int ioctl_get_speed(struct client *client, union ioctl_arg *arg) |
33580a3e | 1328 | { |
c8a25900 | 1329 | return client->device->max_speed; |
33580a3e SR |
1330 | } |
1331 | ||
6e95dea7 SR |
1332 | static int ioctl_send_broadcast_request(struct client *client, |
1333 | union ioctl_arg *arg) | |
acfe8333 | 1334 | { |
6e95dea7 | 1335 | struct fw_cdev_send_request *a = &arg->send_request; |
acfe8333 | 1336 | |
6e95dea7 | 1337 | switch (a->tcode) { |
acfe8333 JFSR |
1338 | case TCODE_WRITE_QUADLET_REQUEST: |
1339 | case TCODE_WRITE_BLOCK_REQUEST: | |
1340 | break; | |
1341 | default: | |
1342 | return -EINVAL; | |
1343 | } | |
1344 | ||
1566f3dc | 1345 | /* Security policy: Only allow accesses to Units Space. */ |
6e95dea7 | 1346 | if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END) |
1566f3dc SR |
1347 | return -EACCES; |
1348 | ||
6e95dea7 | 1349 | return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100); |
acfe8333 JFSR |
1350 | } |
1351 | ||
6e95dea7 | 1352 | static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg) |
f8c2287c | 1353 | { |
6e95dea7 | 1354 | struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet; |
18e9b10f SR |
1355 | struct fw_cdev_send_request request; |
1356 | int dest; | |
f8c2287c | 1357 | |
6e95dea7 SR |
1358 | if (a->speed > client->device->card->link_speed || |
1359 | a->length > 1024 << a->speed) | |
18e9b10f | 1360 | return -EIO; |
f8c2287c | 1361 | |
6e95dea7 | 1362 | if (a->tag > 3 || a->channel > 63 || a->sy > 15) |
18e9b10f SR |
1363 | return -EINVAL; |
1364 | ||
6e95dea7 | 1365 | dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy); |
18e9b10f | 1366 | request.tcode = TCODE_STREAM_DATA; |
6e95dea7 SR |
1367 | request.length = a->length; |
1368 | request.closure = a->closure; | |
1369 | request.data = a->data; | |
1370 | request.generation = a->generation; | |
18e9b10f | 1371 | |
6e95dea7 | 1372 | return init_request(client, &request, dest, a->speed); |
f8c2287c JF |
1373 | } |
1374 | ||
6e95dea7 | 1375 | static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = { |
4f259223 KH |
1376 | ioctl_get_info, |
1377 | ioctl_send_request, | |
1378 | ioctl_allocate, | |
1379 | ioctl_deallocate, | |
1380 | ioctl_send_response, | |
1381 | ioctl_initiate_bus_reset, | |
1382 | ioctl_add_descriptor, | |
1383 | ioctl_remove_descriptor, | |
1384 | ioctl_create_iso_context, | |
1385 | ioctl_queue_iso, | |
1386 | ioctl_start_iso, | |
1387 | ioctl_stop_iso, | |
a64408b9 | 1388 | ioctl_get_cycle_timer, |
b1bda4cd JFSR |
1389 | ioctl_allocate_iso_resource, |
1390 | ioctl_deallocate_iso_resource, | |
1ec3c026 SR |
1391 | ioctl_allocate_iso_resource_once, |
1392 | ioctl_deallocate_iso_resource_once, | |
33580a3e | 1393 | ioctl_get_speed, |
acfe8333 | 1394 | ioctl_send_broadcast_request, |
f8c2287c | 1395 | ioctl_send_stream_packet, |
abfe5a01 | 1396 | ioctl_get_cycle_timer2, |
4f259223 KH |
1397 | }; |
1398 | ||
53dca511 SR |
1399 | static int dispatch_ioctl(struct client *client, |
1400 | unsigned int cmd, void __user *arg) | |
19a15b93 | 1401 | { |
6e95dea7 | 1402 | union ioctl_arg buffer; |
2dbd7d7e | 1403 | int ret; |
4f259223 | 1404 | |
64582298 SR |
1405 | if (fw_device_is_shutdown(client->device)) |
1406 | return -ENODEV; | |
1407 | ||
4f259223 | 1408 | if (_IOC_TYPE(cmd) != '#' || |
9cac00b8 SR |
1409 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) || |
1410 | _IOC_SIZE(cmd) > sizeof(buffer)) | |
19a15b93 | 1411 | return -EINVAL; |
4f259223 | 1412 | |
9cac00b8 SR |
1413 | if (_IOC_DIR(cmd) == _IOC_READ) |
1414 | memset(&buffer, 0, _IOC_SIZE(cmd)); | |
1415 | ||
1416 | if (_IOC_DIR(cmd) & _IOC_WRITE) | |
1417 | if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd))) | |
4f259223 | 1418 | return -EFAULT; |
4f259223 | 1419 | |
6e95dea7 | 1420 | ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer); |
2dbd7d7e SR |
1421 | if (ret < 0) |
1422 | return ret; | |
4f259223 | 1423 | |
9cac00b8 SR |
1424 | if (_IOC_DIR(cmd) & _IOC_READ) |
1425 | if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd))) | |
4f259223 | 1426 | return -EFAULT; |
4f259223 | 1427 | |
2dbd7d7e | 1428 | return ret; |
19a15b93 KH |
1429 | } |
1430 | ||
53dca511 SR |
1431 | static long fw_device_op_ioctl(struct file *file, |
1432 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1433 | { |
64582298 | 1434 | return dispatch_ioctl(file->private_data, cmd, (void __user *)arg); |
19a15b93 KH |
1435 | } |
1436 | ||
1437 | #ifdef CONFIG_COMPAT | |
53dca511 SR |
1438 | static long fw_device_op_compat_ioctl(struct file *file, |
1439 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1440 | { |
64582298 | 1441 | return dispatch_ioctl(file->private_data, cmd, compat_ptr(arg)); |
19a15b93 KH |
1442 | } |
1443 | #endif | |
1444 | ||
1445 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
1446 | { | |
1447 | struct client *client = file->private_data; | |
9aad8125 KH |
1448 | enum dma_data_direction direction; |
1449 | unsigned long size; | |
2dbd7d7e | 1450 | int page_count, ret; |
9aad8125 | 1451 | |
551f4cb9 JF |
1452 | if (fw_device_is_shutdown(client->device)) |
1453 | return -ENODEV; | |
1454 | ||
9aad8125 KH |
1455 | /* FIXME: We could support multiple buffers, but we don't. */ |
1456 | if (client->buffer.pages != NULL) | |
1457 | return -EBUSY; | |
1458 | ||
1459 | if (!(vma->vm_flags & VM_SHARED)) | |
1460 | return -EINVAL; | |
19a15b93 | 1461 | |
9aad8125 | 1462 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
1463 | return -EINVAL; |
1464 | ||
1465 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
1466 | size = vma->vm_end - vma->vm_start; |
1467 | page_count = size >> PAGE_SHIFT; | |
1468 | if (size & ~PAGE_MASK) | |
1469 | return -EINVAL; | |
1470 | ||
1471 | if (vma->vm_flags & VM_WRITE) | |
1472 | direction = DMA_TO_DEVICE; | |
1473 | else | |
1474 | direction = DMA_FROM_DEVICE; | |
1475 | ||
2dbd7d7e SR |
1476 | ret = fw_iso_buffer_init(&client->buffer, client->device->card, |
1477 | page_count, direction); | |
1478 | if (ret < 0) | |
1479 | return ret; | |
19a15b93 | 1480 | |
2dbd7d7e SR |
1481 | ret = fw_iso_buffer_map(&client->buffer, vma); |
1482 | if (ret < 0) | |
9aad8125 KH |
1483 | fw_iso_buffer_destroy(&client->buffer, client->device->card); |
1484 | ||
2dbd7d7e | 1485 | return ret; |
19a15b93 KH |
1486 | } |
1487 | ||
45ee3199 JF |
1488 | static int shutdown_resource(int id, void *p, void *data) |
1489 | { | |
e21fcf79 | 1490 | struct client_resource *resource = p; |
45ee3199 JF |
1491 | struct client *client = data; |
1492 | ||
e21fcf79 | 1493 | resource->release(client, resource); |
fb443036 | 1494 | client_put(client); |
45ee3199 JF |
1495 | |
1496 | return 0; | |
1497 | } | |
1498 | ||
19a15b93 KH |
1499 | static int fw_device_op_release(struct inode *inode, struct file *file) |
1500 | { | |
1501 | struct client *client = file->private_data; | |
e21fcf79 | 1502 | struct event *event, *next_event; |
19a15b93 | 1503 | |
97811e34 SR |
1504 | mutex_lock(&client->device->client_list_mutex); |
1505 | list_del(&client->link); | |
1506 | mutex_unlock(&client->device->client_list_mutex); | |
1507 | ||
19a15b93 KH |
1508 | if (client->iso_context) |
1509 | fw_iso_context_destroy(client->iso_context); | |
1510 | ||
36a755cf SR |
1511 | if (client->buffer.pages) |
1512 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
1513 | ||
45ee3199 | 1514 | /* Freeze client->resource_idr and client->event_list */ |
3ba94986 | 1515 | spin_lock_irq(&client->lock); |
45ee3199 | 1516 | client->in_shutdown = true; |
3ba94986 | 1517 | spin_unlock_irq(&client->lock); |
66dea3e5 | 1518 | |
45ee3199 JF |
1519 | idr_for_each(&client->resource_idr, shutdown_resource, client); |
1520 | idr_remove_all(&client->resource_idr); | |
1521 | idr_destroy(&client->resource_idr); | |
28cf6a04 | 1522 | |
e21fcf79 SR |
1523 | list_for_each_entry_safe(event, next_event, &client->event_list, link) |
1524 | kfree(event); | |
19a15b93 | 1525 | |
fb443036 | 1526 | client_put(client); |
19a15b93 KH |
1527 | |
1528 | return 0; | |
1529 | } | |
1530 | ||
1531 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
1532 | { | |
1533 | struct client *client = file->private_data; | |
2603bf21 | 1534 | unsigned int mask = 0; |
19a15b93 KH |
1535 | |
1536 | poll_wait(file, &client->wait, pt); | |
1537 | ||
2603bf21 KH |
1538 | if (fw_device_is_shutdown(client->device)) |
1539 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 1540 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
1541 | mask |= POLLIN | POLLRDNORM; |
1542 | ||
1543 | return mask; | |
19a15b93 KH |
1544 | } |
1545 | ||
21ebcd12 | 1546 | const struct file_operations fw_device_ops = { |
19a15b93 | 1547 | .owner = THIS_MODULE, |
3ac26b2e | 1548 | .llseek = no_llseek, |
19a15b93 KH |
1549 | .open = fw_device_op_open, |
1550 | .read = fw_device_op_read, | |
1551 | .unlocked_ioctl = fw_device_op_ioctl, | |
19a15b93 | 1552 | .mmap = fw_device_op_mmap, |
3ac26b2e SR |
1553 | .release = fw_device_op_release, |
1554 | .poll = fw_device_op_poll, | |
19a15b93 | 1555 | #ifdef CONFIG_COMPAT |
5af4e5ea | 1556 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
1557 | #endif |
1558 | }; |