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 | ||
eb5b35a5 | 21 | #include <linux/bug.h> |
be5bbd67 SR |
22 | #include <linux/compat.h> |
23 | #include <linux/delay.h> | |
24 | #include <linux/device.h> | |
25 | #include <linux/errno.h> | |
77c9a5da | 26 | #include <linux/firewire.h> |
be5bbd67 SR |
27 | #include <linux/firewire-cdev.h> |
28 | #include <linux/idr.h> | |
4a9bde9b | 29 | #include <linux/irqflags.h> |
b1bda4cd | 30 | #include <linux/jiffies.h> |
19a15b93 | 31 | #include <linux/kernel.h> |
fb443036 | 32 | #include <linux/kref.h> |
be5bbd67 SR |
33 | #include <linux/mm.h> |
34 | #include <linux/module.h> | |
d67cfb96 | 35 | #include <linux/mutex.h> |
19a15b93 | 36 | #include <linux/poll.h> |
a99bbaf5 | 37 | #include <linux/sched.h> |
cf417e54 | 38 | #include <linux/spinlock.h> |
281e2032 | 39 | #include <linux/string.h> |
be5bbd67 | 40 | #include <linux/time.h> |
e034d242 | 41 | #include <linux/uaccess.h> |
be5bbd67 SR |
42 | #include <linux/vmalloc.h> |
43 | #include <linux/wait.h> | |
b1bda4cd | 44 | #include <linux/workqueue.h> |
be5bbd67 | 45 | |
a64408b9 | 46 | #include <asm/system.h> |
be5bbd67 | 47 | |
77c9a5da | 48 | #include "core.h" |
19a15b93 | 49 | |
604f4516 SR |
50 | /* |
51 | * ABI version history is documented in linux/firewire-cdev.h. | |
52 | */ | |
e205597d SR |
53 | #define FW_CDEV_KERNEL_VERSION 4 |
54 | #define FW_CDEV_VERSION_EVENT_REQUEST2 4 | |
604f4516 | 55 | |
19a15b93 | 56 | struct client { |
344bbc4d | 57 | u32 version; |
19a15b93 | 58 | struct fw_device *device; |
45ee3199 | 59 | |
19a15b93 | 60 | spinlock_t lock; |
45ee3199 JF |
61 | bool in_shutdown; |
62 | struct idr resource_idr; | |
19a15b93 | 63 | struct list_head event_list; |
19a15b93 | 64 | wait_queue_head_t wait; |
da8ecffa | 65 | u64 bus_reset_closure; |
9aad8125 | 66 | |
19a15b93 | 67 | struct fw_iso_context *iso_context; |
abaa5743 | 68 | u64 iso_closure; |
9aad8125 KH |
69 | struct fw_iso_buffer buffer; |
70 | unsigned long vm_start; | |
97bd9efa KH |
71 | |
72 | struct list_head link; | |
fb443036 | 73 | struct kref kref; |
19a15b93 KH |
74 | }; |
75 | ||
fb443036 SR |
76 | static inline void client_get(struct client *client) |
77 | { | |
78 | kref_get(&client->kref); | |
79 | } | |
80 | ||
81 | static void client_release(struct kref *kref) | |
82 | { | |
83 | struct client *client = container_of(kref, struct client, kref); | |
84 | ||
85 | fw_device_put(client->device); | |
86 | kfree(client); | |
87 | } | |
88 | ||
89 | static void client_put(struct client *client) | |
90 | { | |
91 | kref_put(&client->kref, client_release); | |
92 | } | |
93 | ||
97c18b7f SR |
94 | struct client_resource; |
95 | typedef void (*client_resource_release_fn_t)(struct client *, | |
96 | struct client_resource *); | |
97 | struct client_resource { | |
98 | client_resource_release_fn_t release; | |
99 | int handle; | |
100 | }; | |
101 | ||
102 | struct address_handler_resource { | |
103 | struct client_resource resource; | |
104 | struct fw_address_handler handler; | |
105 | __u64 closure; | |
106 | struct client *client; | |
107 | }; | |
108 | ||
109 | struct outbound_transaction_resource { | |
110 | struct client_resource resource; | |
111 | struct fw_transaction transaction; | |
112 | }; | |
113 | ||
114 | struct inbound_transaction_resource { | |
115 | struct client_resource resource; | |
08bd34c9 | 116 | struct fw_card *card; |
97c18b7f SR |
117 | struct fw_request *request; |
118 | void *data; | |
119 | size_t length; | |
120 | }; | |
121 | ||
122 | struct descriptor_resource { | |
123 | struct client_resource resource; | |
124 | struct fw_descriptor descriptor; | |
125 | u32 data[0]; | |
126 | }; | |
127 | ||
b1bda4cd JFSR |
128 | struct iso_resource { |
129 | struct client_resource resource; | |
130 | struct client *client; | |
131 | /* Schedule work and access todo only with client->lock held. */ | |
132 | struct delayed_work work; | |
1ec3c026 SR |
133 | enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC, |
134 | ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo; | |
b1bda4cd JFSR |
135 | int generation; |
136 | u64 channels; | |
137 | s32 bandwidth; | |
6fdc0370 | 138 | __be32 transaction_data[2]; |
b1bda4cd JFSR |
139 | struct iso_resource_event *e_alloc, *e_dealloc; |
140 | }; | |
141 | ||
b1bda4cd JFSR |
142 | static void release_iso_resource(struct client *, struct client_resource *); |
143 | ||
9fb551bf SR |
144 | static void schedule_iso_resource(struct iso_resource *r, unsigned long delay) |
145 | { | |
146 | client_get(r->client); | |
147 | if (!schedule_delayed_work(&r->work, delay)) | |
148 | client_put(r->client); | |
149 | } | |
150 | ||
151 | static void schedule_if_iso_resource(struct client_resource *resource) | |
152 | { | |
153 | if (resource->release == release_iso_resource) | |
154 | schedule_iso_resource(container_of(resource, | |
155 | struct iso_resource, resource), 0); | |
156 | } | |
157 | ||
97c18b7f SR |
158 | /* |
159 | * dequeue_event() just kfree()'s the event, so the event has to be | |
160 | * the first field in a struct XYZ_event. | |
161 | */ | |
162 | struct event { | |
163 | struct { void *data; size_t size; } v[2]; | |
164 | struct list_head link; | |
165 | }; | |
166 | ||
167 | struct bus_reset_event { | |
168 | struct event event; | |
169 | struct fw_cdev_event_bus_reset reset; | |
170 | }; | |
171 | ||
172 | struct outbound_transaction_event { | |
173 | struct event event; | |
174 | struct client *client; | |
175 | struct outbound_transaction_resource r; | |
176 | struct fw_cdev_event_response response; | |
177 | }; | |
178 | ||
179 | struct inbound_transaction_event { | |
180 | struct event event; | |
e205597d SR |
181 | union { |
182 | struct fw_cdev_event_request request; | |
183 | struct fw_cdev_event_request2 request2; | |
184 | } req; | |
97c18b7f SR |
185 | }; |
186 | ||
187 | struct iso_interrupt_event { | |
188 | struct event event; | |
189 | struct fw_cdev_event_iso_interrupt interrupt; | |
190 | }; | |
191 | ||
b1bda4cd JFSR |
192 | struct iso_resource_event { |
193 | struct event event; | |
e21fcf79 | 194 | struct fw_cdev_event_iso_resource iso_resource; |
b1bda4cd JFSR |
195 | }; |
196 | ||
53dca511 | 197 | static inline void __user *u64_to_uptr(__u64 value) |
19a15b93 KH |
198 | { |
199 | return (void __user *)(unsigned long)value; | |
200 | } | |
201 | ||
53dca511 | 202 | static inline __u64 uptr_to_u64(void __user *ptr) |
19a15b93 KH |
203 | { |
204 | return (__u64)(unsigned long)ptr; | |
205 | } | |
206 | ||
207 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
208 | { | |
209 | struct fw_device *device; | |
210 | struct client *client; | |
211 | ||
96b19062 | 212 | device = fw_device_get_by_devt(inode->i_rdev); |
a3aca3da KH |
213 | if (device == NULL) |
214 | return -ENODEV; | |
19a15b93 | 215 | |
551f4cb9 JF |
216 | if (fw_device_is_shutdown(device)) { |
217 | fw_device_put(device); | |
218 | return -ENODEV; | |
219 | } | |
220 | ||
2d826cc5 | 221 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
96b19062 SR |
222 | if (client == NULL) { |
223 | fw_device_put(device); | |
19a15b93 | 224 | return -ENOMEM; |
96b19062 | 225 | } |
19a15b93 | 226 | |
96b19062 | 227 | client->device = device; |
19a15b93 | 228 | spin_lock_init(&client->lock); |
45ee3199 JF |
229 | idr_init(&client->resource_idr); |
230 | INIT_LIST_HEAD(&client->event_list); | |
19a15b93 | 231 | init_waitqueue_head(&client->wait); |
fb443036 | 232 | kref_init(&client->kref); |
19a15b93 KH |
233 | |
234 | file->private_data = client; | |
235 | ||
d67cfb96 | 236 | mutex_lock(&device->client_list_mutex); |
97bd9efa | 237 | list_add_tail(&client->link, &device->client_list); |
d67cfb96 | 238 | mutex_unlock(&device->client_list_mutex); |
97bd9efa | 239 | |
3ac26b2e | 240 | return nonseekable_open(inode, file); |
19a15b93 KH |
241 | } |
242 | ||
243 | static void queue_event(struct client *client, struct event *event, | |
244 | void *data0, size_t size0, void *data1, size_t size1) | |
245 | { | |
246 | unsigned long flags; | |
247 | ||
248 | event->v[0].data = data0; | |
249 | event->v[0].size = size0; | |
250 | event->v[1].data = data1; | |
251 | event->v[1].size = size1; | |
252 | ||
253 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
254 | if (client->in_shutdown) |
255 | kfree(event); | |
256 | else | |
257 | list_add_tail(&event->link, &client->event_list); | |
19a15b93 | 258 | spin_unlock_irqrestore(&client->lock, flags); |
83431cba JF |
259 | |
260 | wake_up_interruptible(&client->wait); | |
19a15b93 KH |
261 | } |
262 | ||
53dca511 SR |
263 | static int dequeue_event(struct client *client, |
264 | char __user *buffer, size_t count) | |
19a15b93 | 265 | { |
19a15b93 KH |
266 | struct event *event; |
267 | size_t size, total; | |
2dbd7d7e | 268 | int i, ret; |
19a15b93 | 269 | |
2dbd7d7e SR |
270 | ret = wait_event_interruptible(client->wait, |
271 | !list_empty(&client->event_list) || | |
272 | fw_device_is_shutdown(client->device)); | |
273 | if (ret < 0) | |
274 | return ret; | |
19a15b93 | 275 | |
2603bf21 KH |
276 | if (list_empty(&client->event_list) && |
277 | fw_device_is_shutdown(client->device)) | |
278 | return -ENODEV; | |
19a15b93 | 279 | |
3ba94986 | 280 | spin_lock_irq(&client->lock); |
a459b8ab | 281 | event = list_first_entry(&client->event_list, struct event, link); |
19a15b93 | 282 | list_del(&event->link); |
3ba94986 | 283 | spin_unlock_irq(&client->lock); |
19a15b93 | 284 | |
19a15b93 KH |
285 | total = 0; |
286 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
287 | size = min(event->v[i].size, count - total); | |
2603bf21 | 288 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
2dbd7d7e | 289 | ret = -EFAULT; |
19a15b93 | 290 | goto out; |
2603bf21 | 291 | } |
19a15b93 KH |
292 | total += size; |
293 | } | |
2dbd7d7e | 294 | ret = total; |
19a15b93 KH |
295 | |
296 | out: | |
297 | kfree(event); | |
298 | ||
2dbd7d7e | 299 | return ret; |
19a15b93 KH |
300 | } |
301 | ||
53dca511 SR |
302 | static ssize_t fw_device_op_read(struct file *file, char __user *buffer, |
303 | size_t count, loff_t *offset) | |
19a15b93 KH |
304 | { |
305 | struct client *client = file->private_data; | |
306 | ||
307 | return dequeue_event(client, buffer, count); | |
308 | } | |
309 | ||
53dca511 SR |
310 | static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, |
311 | struct client *client) | |
344bbc4d | 312 | { |
da8ecffa | 313 | struct fw_card *card = client->device->card; |
cf417e54 | 314 | |
3ba94986 | 315 | spin_lock_irq(&card->lock); |
344bbc4d | 316 | |
da8ecffa | 317 | event->closure = client->bus_reset_closure; |
344bbc4d | 318 | event->type = FW_CDEV_EVENT_BUS_RESET; |
cf5a56ac | 319 | event->generation = client->device->generation; |
da8ecffa | 320 | event->node_id = client->device->node_id; |
344bbc4d | 321 | event->local_node_id = card->local_node->node_id; |
250b2b6d | 322 | event->bm_node_id = card->bm_node_id; |
344bbc4d KH |
323 | event->irm_node_id = card->irm_node->node_id; |
324 | event->root_node_id = card->root_node->node_id; | |
cf417e54 | 325 | |
3ba94986 | 326 | spin_unlock_irq(&card->lock); |
344bbc4d KH |
327 | } |
328 | ||
53dca511 SR |
329 | static void for_each_client(struct fw_device *device, |
330 | void (*callback)(struct client *client)) | |
2603bf21 | 331 | { |
2603bf21 | 332 | struct client *c; |
2603bf21 | 333 | |
d67cfb96 | 334 | mutex_lock(&device->client_list_mutex); |
2603bf21 KH |
335 | list_for_each_entry(c, &device->client_list, link) |
336 | callback(c); | |
d67cfb96 | 337 | mutex_unlock(&device->client_list_mutex); |
2603bf21 KH |
338 | } |
339 | ||
b1bda4cd JFSR |
340 | static int schedule_reallocations(int id, void *p, void *data) |
341 | { | |
9fb551bf | 342 | schedule_if_iso_resource(p); |
b1bda4cd | 343 | |
b1bda4cd JFSR |
344 | return 0; |
345 | } | |
346 | ||
53dca511 | 347 | static void queue_bus_reset_event(struct client *client) |
97bd9efa | 348 | { |
97c18b7f | 349 | struct bus_reset_event *e; |
97bd9efa | 350 | |
97c18b7f SR |
351 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
352 | if (e == NULL) { | |
97bd9efa KH |
353 | fw_notify("Out of memory when allocating bus reset event\n"); |
354 | return; | |
355 | } | |
356 | ||
97c18b7f | 357 | fill_bus_reset_event(&e->reset, client); |
97bd9efa | 358 | |
97c18b7f SR |
359 | queue_event(client, &e->event, |
360 | &e->reset, sizeof(e->reset), NULL, 0); | |
b1bda4cd JFSR |
361 | |
362 | spin_lock_irq(&client->lock); | |
363 | idr_for_each(&client->resource_idr, schedule_reallocations, client); | |
364 | spin_unlock_irq(&client->lock); | |
97bd9efa KH |
365 | } |
366 | ||
367 | void fw_device_cdev_update(struct fw_device *device) | |
368 | { | |
2603bf21 KH |
369 | for_each_client(device, queue_bus_reset_event); |
370 | } | |
97bd9efa | 371 | |
2603bf21 KH |
372 | static void wake_up_client(struct client *client) |
373 | { | |
374 | wake_up_interruptible(&client->wait); | |
375 | } | |
97bd9efa | 376 | |
2603bf21 KH |
377 | void fw_device_cdev_remove(struct fw_device *device) |
378 | { | |
379 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
380 | } |
381 | ||
6e95dea7 SR |
382 | union ioctl_arg { |
383 | struct fw_cdev_get_info get_info; | |
384 | struct fw_cdev_send_request send_request; | |
385 | struct fw_cdev_allocate allocate; | |
386 | struct fw_cdev_deallocate deallocate; | |
387 | struct fw_cdev_send_response send_response; | |
388 | struct fw_cdev_initiate_bus_reset initiate_bus_reset; | |
389 | struct fw_cdev_add_descriptor add_descriptor; | |
390 | struct fw_cdev_remove_descriptor remove_descriptor; | |
391 | struct fw_cdev_create_iso_context create_iso_context; | |
392 | struct fw_cdev_queue_iso queue_iso; | |
393 | struct fw_cdev_start_iso start_iso; | |
394 | struct fw_cdev_stop_iso stop_iso; | |
395 | struct fw_cdev_get_cycle_timer get_cycle_timer; | |
396 | struct fw_cdev_allocate_iso_resource allocate_iso_resource; | |
397 | struct fw_cdev_send_stream_packet send_stream_packet; | |
398 | struct fw_cdev_get_cycle_timer2 get_cycle_timer2; | |
399 | }; | |
400 | ||
401 | static int ioctl_get_info(struct client *client, union ioctl_arg *arg) | |
19a15b93 | 402 | { |
6e95dea7 | 403 | struct fw_cdev_get_info *a = &arg->get_info; |
344bbc4d | 404 | struct fw_cdev_event_bus_reset bus_reset; |
c9755e14 | 405 | unsigned long ret = 0; |
344bbc4d | 406 | |
6e95dea7 | 407 | client->version = a->version; |
604f4516 | 408 | a->version = FW_CDEV_KERNEL_VERSION; |
6e95dea7 | 409 | a->card = client->device->card->index; |
344bbc4d | 410 | |
c9755e14 SR |
411 | down_read(&fw_device_rwsem); |
412 | ||
6e95dea7 SR |
413 | if (a->rom != 0) { |
414 | size_t want = a->rom_length; | |
d84702a5 | 415 | size_t have = client->device->config_rom_length * 4; |
344bbc4d | 416 | |
6e95dea7 SR |
417 | ret = copy_to_user(u64_to_uptr(a->rom), |
418 | client->device->config_rom, min(want, have)); | |
344bbc4d | 419 | } |
6e95dea7 | 420 | a->rom_length = client->device->config_rom_length * 4; |
344bbc4d | 421 | |
c9755e14 SR |
422 | up_read(&fw_device_rwsem); |
423 | ||
424 | if (ret != 0) | |
425 | return -EFAULT; | |
426 | ||
6e95dea7 SR |
427 | client->bus_reset_closure = a->bus_reset_closure; |
428 | if (a->bus_reset != 0) { | |
da8ecffa | 429 | fill_bus_reset_event(&bus_reset, client); |
6e95dea7 SR |
430 | if (copy_to_user(u64_to_uptr(a->bus_reset), |
431 | &bus_reset, sizeof(bus_reset))) | |
344bbc4d KH |
432 | return -EFAULT; |
433 | } | |
19a15b93 | 434 | |
19a15b93 KH |
435 | return 0; |
436 | } | |
437 | ||
53dca511 SR |
438 | static int add_client_resource(struct client *client, |
439 | struct client_resource *resource, gfp_t gfp_mask) | |
3964a449 KH |
440 | { |
441 | unsigned long flags; | |
45ee3199 JF |
442 | int ret; |
443 | ||
444 | retry: | |
445 | if (idr_pre_get(&client->resource_idr, gfp_mask) == 0) | |
446 | return -ENOMEM; | |
3964a449 KH |
447 | |
448 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
449 | if (client->in_shutdown) |
450 | ret = -ECANCELED; | |
451 | else | |
452 | ret = idr_get_new(&client->resource_idr, resource, | |
453 | &resource->handle); | |
b1bda4cd | 454 | if (ret >= 0) { |
fb443036 | 455 | client_get(client); |
9fb551bf | 456 | schedule_if_iso_resource(resource); |
b1bda4cd | 457 | } |
3964a449 | 458 | spin_unlock_irqrestore(&client->lock, flags); |
45ee3199 JF |
459 | |
460 | if (ret == -EAGAIN) | |
461 | goto retry; | |
462 | ||
463 | return ret < 0 ? ret : 0; | |
3964a449 KH |
464 | } |
465 | ||
53dca511 SR |
466 | static int release_client_resource(struct client *client, u32 handle, |
467 | client_resource_release_fn_t release, | |
e21fcf79 | 468 | struct client_resource **return_resource) |
3964a449 | 469 | { |
e21fcf79 | 470 | struct client_resource *resource; |
3964a449 | 471 | |
3ba94986 | 472 | spin_lock_irq(&client->lock); |
45ee3199 | 473 | if (client->in_shutdown) |
e21fcf79 | 474 | resource = NULL; |
45ee3199 | 475 | else |
e21fcf79 SR |
476 | resource = idr_find(&client->resource_idr, handle); |
477 | if (resource && resource->release == release) | |
45ee3199 | 478 | idr_remove(&client->resource_idr, handle); |
3ba94986 | 479 | spin_unlock_irq(&client->lock); |
3964a449 | 480 | |
e21fcf79 | 481 | if (!(resource && resource->release == release)) |
3964a449 KH |
482 | return -EINVAL; |
483 | ||
e21fcf79 SR |
484 | if (return_resource) |
485 | *return_resource = resource; | |
3964a449 | 486 | else |
e21fcf79 | 487 | resource->release(client, resource); |
3964a449 | 488 | |
fb443036 SR |
489 | client_put(client); |
490 | ||
3964a449 KH |
491 | return 0; |
492 | } | |
493 | ||
53dca511 SR |
494 | static void release_transaction(struct client *client, |
495 | struct client_resource *resource) | |
3964a449 | 496 | { |
97c18b7f SR |
497 | struct outbound_transaction_resource *r = container_of(resource, |
498 | struct outbound_transaction_resource, resource); | |
3964a449 | 499 | |
97c18b7f | 500 | fw_cancel_transaction(client->device->card, &r->transaction); |
3964a449 KH |
501 | } |
502 | ||
53dca511 SR |
503 | static void complete_transaction(struct fw_card *card, int rcode, |
504 | void *payload, size_t length, void *data) | |
19a15b93 | 505 | { |
97c18b7f SR |
506 | struct outbound_transaction_event *e = data; |
507 | struct fw_cdev_event_response *rsp = &e->response; | |
508 | struct client *client = e->client; | |
28cf6a04 | 509 | unsigned long flags; |
19a15b93 | 510 | |
97c18b7f SR |
511 | if (length < rsp->length) |
512 | rsp->length = length; | |
19a15b93 | 513 | if (rcode == RCODE_COMPLETE) |
97c18b7f | 514 | memcpy(rsp->data, payload, rsp->length); |
19a15b93 | 515 | |
28cf6a04 | 516 | spin_lock_irqsave(&client->lock, flags); |
45ee3199 | 517 | /* |
fb443036 SR |
518 | * 1. If called while in shutdown, the idr tree must be left untouched. |
519 | * The idr handle will be removed and the client reference will be | |
520 | * dropped later. | |
521 | * 2. If the call chain was release_client_resource -> | |
522 | * release_transaction -> complete_transaction (instead of a normal | |
523 | * conclusion of the transaction), i.e. if this resource was already | |
524 | * unregistered from the idr, the client reference will be dropped | |
525 | * by release_client_resource and we must not drop it here. | |
45ee3199 | 526 | */ |
fb443036 | 527 | if (!client->in_shutdown && |
97c18b7f SR |
528 | idr_find(&client->resource_idr, e->r.resource.handle)) { |
529 | idr_remove(&client->resource_idr, e->r.resource.handle); | |
fb443036 SR |
530 | /* Drop the idr's reference */ |
531 | client_put(client); | |
532 | } | |
28cf6a04 KH |
533 | spin_unlock_irqrestore(&client->lock, flags); |
534 | ||
97c18b7f SR |
535 | rsp->type = FW_CDEV_EVENT_RESPONSE; |
536 | rsp->rcode = rcode; | |
8401d92b DM |
537 | |
538 | /* | |
97c18b7f | 539 | * In the case that sizeof(*rsp) doesn't align with the position of the |
8401d92b DM |
540 | * data, and the read is short, preserve an extra copy of the data |
541 | * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless | |
542 | * for short reads and some apps depended on it, this is both safe | |
543 | * and prudent for compatibility. | |
544 | */ | |
97c18b7f SR |
545 | if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data)) |
546 | queue_event(client, &e->event, rsp, sizeof(*rsp), | |
547 | rsp->data, rsp->length); | |
8401d92b | 548 | else |
97c18b7f | 549 | queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length, |
8401d92b | 550 | NULL, 0); |
fb443036 SR |
551 | |
552 | /* Drop the transaction callback's reference */ | |
553 | client_put(client); | |
19a15b93 KH |
554 | } |
555 | ||
acfe8333 JFSR |
556 | static int init_request(struct client *client, |
557 | struct fw_cdev_send_request *request, | |
558 | int destination_id, int speed) | |
19a15b93 | 559 | { |
97c18b7f | 560 | struct outbound_transaction_event *e; |
1f3125af | 561 | int ret; |
19a15b93 | 562 | |
18e9b10f SR |
563 | if (request->tcode != TCODE_STREAM_DATA && |
564 | (request->length > 4096 || request->length > 512 << speed)) | |
5d3fd692 | 565 | return -EIO; |
19a15b93 | 566 | |
a8e93f3d CL |
567 | if (request->tcode == TCODE_WRITE_QUADLET_REQUEST && |
568 | request->length < 4) | |
569 | return -EINVAL; | |
570 | ||
97c18b7f SR |
571 | e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL); |
572 | if (e == NULL) | |
19a15b93 KH |
573 | return -ENOMEM; |
574 | ||
97c18b7f SR |
575 | e->client = client; |
576 | e->response.length = request->length; | |
577 | e->response.closure = request->closure; | |
19a15b93 | 578 | |
4f259223 | 579 | if (request->data && |
97c18b7f | 580 | copy_from_user(e->response.data, |
4f259223 | 581 | u64_to_uptr(request->data), request->length)) { |
1f3125af | 582 | ret = -EFAULT; |
45ee3199 | 583 | goto failed; |
1f3125af SR |
584 | } |
585 | ||
97c18b7f SR |
586 | e->r.resource.release = release_transaction; |
587 | ret = add_client_resource(client, &e->r.resource, GFP_KERNEL); | |
45ee3199 JF |
588 | if (ret < 0) |
589 | goto failed; | |
28cf6a04 | 590 | |
fb443036 SR |
591 | /* Get a reference for the transaction callback */ |
592 | client_get(client); | |
593 | ||
acfe8333 | 594 | fw_send_request(client->device->card, &e->r.transaction, |
664d8010 SR |
595 | request->tcode, destination_id, request->generation, |
596 | speed, request->offset, e->response.data, | |
597 | request->length, complete_transaction, e); | |
598 | return 0; | |
19a15b93 | 599 | |
45ee3199 | 600 | failed: |
97c18b7f | 601 | kfree(e); |
1f3125af SR |
602 | |
603 | return ret; | |
19a15b93 KH |
604 | } |
605 | ||
6e95dea7 | 606 | static int ioctl_send_request(struct client *client, union ioctl_arg *arg) |
acfe8333 | 607 | { |
6e95dea7 | 608 | switch (arg->send_request.tcode) { |
acfe8333 JFSR |
609 | case TCODE_WRITE_QUADLET_REQUEST: |
610 | case TCODE_WRITE_BLOCK_REQUEST: | |
611 | case TCODE_READ_QUADLET_REQUEST: | |
612 | case TCODE_READ_BLOCK_REQUEST: | |
613 | case TCODE_LOCK_MASK_SWAP: | |
614 | case TCODE_LOCK_COMPARE_SWAP: | |
615 | case TCODE_LOCK_FETCH_ADD: | |
616 | case TCODE_LOCK_LITTLE_ADD: | |
617 | case TCODE_LOCK_BOUNDED_ADD: | |
618 | case TCODE_LOCK_WRAP_ADD: | |
619 | case TCODE_LOCK_VENDOR_DEPENDENT: | |
620 | break; | |
621 | default: | |
622 | return -EINVAL; | |
623 | } | |
624 | ||
6e95dea7 | 625 | return init_request(client, &arg->send_request, client->device->node_id, |
acfe8333 JFSR |
626 | client->device->max_speed); |
627 | } | |
628 | ||
281e2032 SR |
629 | static inline bool is_fcp_request(struct fw_request *request) |
630 | { | |
631 | return request == NULL; | |
632 | } | |
633 | ||
53dca511 SR |
634 | static void release_request(struct client *client, |
635 | struct client_resource *resource) | |
3964a449 | 636 | { |
97c18b7f SR |
637 | struct inbound_transaction_resource *r = container_of(resource, |
638 | struct inbound_transaction_resource, resource); | |
3964a449 | 639 | |
281e2032 SR |
640 | if (is_fcp_request(r->request)) |
641 | kfree(r->data); | |
642 | else | |
08bd34c9 | 643 | fw_send_response(r->card, r->request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
644 | |
645 | fw_card_put(r->card); | |
97c18b7f | 646 | kfree(r); |
3964a449 KH |
647 | } |
648 | ||
97c18b7f | 649 | static void handle_request(struct fw_card *card, struct fw_request *request, |
53dca511 | 650 | int tcode, int destination, int source, |
33e553fe | 651 | int generation, unsigned long long offset, |
53dca511 | 652 | void *payload, size_t length, void *callback_data) |
19a15b93 | 653 | { |
97c18b7f SR |
654 | struct address_handler_resource *handler = callback_data; |
655 | struct inbound_transaction_resource *r; | |
656 | struct inbound_transaction_event *e; | |
e205597d | 657 | size_t event_size0; |
281e2032 | 658 | void *fcp_frame = NULL; |
45ee3199 | 659 | int ret; |
19a15b93 | 660 | |
0244f573 SR |
661 | /* card may be different from handler->client->device->card */ |
662 | fw_card_get(card); | |
663 | ||
97c18b7f | 664 | r = kmalloc(sizeof(*r), GFP_ATOMIC); |
2d826cc5 | 665 | e = kmalloc(sizeof(*e), GFP_ATOMIC); |
97c18b7f | 666 | if (r == NULL || e == NULL) |
45ee3199 | 667 | goto failed; |
19a15b93 | 668 | |
08bd34c9 | 669 | r->card = card; |
97c18b7f SR |
670 | r->request = request; |
671 | r->data = payload; | |
672 | r->length = length; | |
19a15b93 | 673 | |
281e2032 SR |
674 | if (is_fcp_request(request)) { |
675 | /* | |
676 | * FIXME: Let core-transaction.c manage a | |
677 | * single reference-counted copy? | |
678 | */ | |
679 | fcp_frame = kmemdup(payload, length, GFP_ATOMIC); | |
680 | if (fcp_frame == NULL) | |
681 | goto failed; | |
682 | ||
683 | r->data = fcp_frame; | |
684 | } | |
685 | ||
97c18b7f SR |
686 | r->resource.release = release_request; |
687 | ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC); | |
45ee3199 JF |
688 | if (ret < 0) |
689 | goto failed; | |
19a15b93 | 690 | |
e205597d SR |
691 | if (handler->client->version < FW_CDEV_VERSION_EVENT_REQUEST2) { |
692 | struct fw_cdev_event_request *req = &e->req.request; | |
693 | ||
694 | if (tcode & 0x10) | |
695 | tcode = TCODE_LOCK_REQUEST; | |
696 | ||
697 | req->type = FW_CDEV_EVENT_REQUEST; | |
698 | req->tcode = tcode; | |
699 | req->offset = offset; | |
700 | req->length = length; | |
701 | req->handle = r->resource.handle; | |
702 | req->closure = handler->closure; | |
703 | event_size0 = sizeof(*req); | |
704 | } else { | |
705 | struct fw_cdev_event_request2 *req = &e->req.request2; | |
706 | ||
707 | req->type = FW_CDEV_EVENT_REQUEST2; | |
708 | req->tcode = tcode; | |
709 | req->offset = offset; | |
710 | req->source_node_id = source; | |
711 | req->destination_node_id = destination; | |
712 | req->card = card->index; | |
713 | req->generation = generation; | |
714 | req->length = length; | |
715 | req->handle = r->resource.handle; | |
716 | req->closure = handler->closure; | |
717 | event_size0 = sizeof(*req); | |
718 | } | |
19a15b93 | 719 | |
97c18b7f | 720 | queue_event(handler->client, &e->event, |
e205597d | 721 | &e->req, event_size0, r->data, length); |
45ee3199 JF |
722 | return; |
723 | ||
724 | failed: | |
97c18b7f | 725 | kfree(r); |
45ee3199 | 726 | kfree(e); |
281e2032 SR |
727 | kfree(fcp_frame); |
728 | ||
729 | if (!is_fcp_request(request)) | |
db5d247a | 730 | fw_send_response(card, request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
731 | |
732 | fw_card_put(card); | |
19a15b93 KH |
733 | } |
734 | ||
53dca511 SR |
735 | static void release_address_handler(struct client *client, |
736 | struct client_resource *resource) | |
3964a449 | 737 | { |
97c18b7f SR |
738 | struct address_handler_resource *r = |
739 | container_of(resource, struct address_handler_resource, resource); | |
3964a449 | 740 | |
97c18b7f SR |
741 | fw_core_remove_address_handler(&r->handler); |
742 | kfree(r); | |
3964a449 KH |
743 | } |
744 | ||
6e95dea7 | 745 | static int ioctl_allocate(struct client *client, union ioctl_arg *arg) |
19a15b93 | 746 | { |
6e95dea7 | 747 | struct fw_cdev_allocate *a = &arg->allocate; |
97c18b7f | 748 | struct address_handler_resource *r; |
19a15b93 | 749 | struct fw_address_region region; |
45ee3199 | 750 | int ret; |
19a15b93 | 751 | |
97c18b7f SR |
752 | r = kmalloc(sizeof(*r), GFP_KERNEL); |
753 | if (r == NULL) | |
19a15b93 KH |
754 | return -ENOMEM; |
755 | ||
6e95dea7 SR |
756 | region.start = a->offset; |
757 | region.end = a->offset + a->length; | |
758 | r->handler.length = a->length; | |
97c18b7f | 759 | r->handler.address_callback = handle_request; |
6e95dea7 SR |
760 | r->handler.callback_data = r; |
761 | r->closure = a->closure; | |
762 | r->client = client; | |
19a15b93 | 763 | |
97c18b7f | 764 | ret = fw_core_add_address_handler(&r->handler, ®ion); |
3e0b5f0d | 765 | if (ret < 0) { |
97c18b7f | 766 | kfree(r); |
3e0b5f0d | 767 | return ret; |
19a15b93 KH |
768 | } |
769 | ||
97c18b7f SR |
770 | r->resource.release = release_address_handler; |
771 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 772 | if (ret < 0) { |
97c18b7f | 773 | release_address_handler(client, &r->resource); |
45ee3199 JF |
774 | return ret; |
775 | } | |
6e95dea7 | 776 | a->handle = r->resource.handle; |
19a15b93 KH |
777 | |
778 | return 0; | |
779 | } | |
780 | ||
6e95dea7 | 781 | static int ioctl_deallocate(struct client *client, union ioctl_arg *arg) |
9472316b | 782 | { |
6e95dea7 | 783 | return release_client_resource(client, arg->deallocate.handle, |
45ee3199 | 784 | release_address_handler, NULL); |
9472316b KH |
785 | } |
786 | ||
6e95dea7 | 787 | static int ioctl_send_response(struct client *client, union ioctl_arg *arg) |
19a15b93 | 788 | { |
6e95dea7 | 789 | struct fw_cdev_send_response *a = &arg->send_response; |
3964a449 | 790 | struct client_resource *resource; |
97c18b7f | 791 | struct inbound_transaction_resource *r; |
7e44c0b5 | 792 | int ret = 0; |
19a15b93 | 793 | |
6e95dea7 | 794 | if (release_client_resource(client, a->handle, |
45ee3199 | 795 | release_request, &resource) < 0) |
19a15b93 | 796 | return -EINVAL; |
45ee3199 | 797 | |
97c18b7f SR |
798 | r = container_of(resource, struct inbound_transaction_resource, |
799 | resource); | |
281e2032 SR |
800 | if (is_fcp_request(r->request)) |
801 | goto out; | |
802 | ||
a10c0ce7 CL |
803 | if (a->length != fw_get_response_length(r->request)) { |
804 | ret = -EINVAL; | |
805 | kfree(r->request); | |
806 | goto out; | |
807 | } | |
808 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length)) { | |
281e2032 SR |
809 | ret = -EFAULT; |
810 | kfree(r->request); | |
811 | goto out; | |
7e44c0b5 | 812 | } |
08bd34c9 | 813 | fw_send_response(r->card, r->request, a->rcode); |
7e44c0b5 | 814 | out: |
0244f573 | 815 | fw_card_put(r->card); |
19a15b93 KH |
816 | kfree(r); |
817 | ||
7e44c0b5 | 818 | return ret; |
19a15b93 KH |
819 | } |
820 | ||
6e95dea7 | 821 | static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg) |
5371842b | 822 | { |
02d37bed | 823 | fw_schedule_bus_reset(client->device->card, true, |
6e95dea7 | 824 | arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET); |
02d37bed | 825 | return 0; |
5371842b KH |
826 | } |
827 | ||
3964a449 KH |
828 | static void release_descriptor(struct client *client, |
829 | struct client_resource *resource) | |
830 | { | |
97c18b7f SR |
831 | struct descriptor_resource *r = |
832 | container_of(resource, struct descriptor_resource, resource); | |
3964a449 | 833 | |
97c18b7f SR |
834 | fw_core_remove_descriptor(&r->descriptor); |
835 | kfree(r); | |
3964a449 KH |
836 | } |
837 | ||
6e95dea7 | 838 | static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 839 | { |
6e95dea7 | 840 | struct fw_cdev_add_descriptor *a = &arg->add_descriptor; |
97c18b7f | 841 | struct descriptor_resource *r; |
45ee3199 | 842 | int ret; |
66dea3e5 | 843 | |
de487da8 | 844 | /* Access policy: Allow this ioctl only on local nodes' device files. */ |
92368890 | 845 | if (!client->device->is_local) |
de487da8 SR |
846 | return -ENOSYS; |
847 | ||
6e95dea7 | 848 | if (a->length > 256) |
66dea3e5 KH |
849 | return -EINVAL; |
850 | ||
6e95dea7 | 851 | r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL); |
97c18b7f | 852 | if (r == NULL) |
66dea3e5 KH |
853 | return -ENOMEM; |
854 | ||
6e95dea7 | 855 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) { |
45ee3199 JF |
856 | ret = -EFAULT; |
857 | goto failed; | |
66dea3e5 KH |
858 | } |
859 | ||
6e95dea7 SR |
860 | r->descriptor.length = a->length; |
861 | r->descriptor.immediate = a->immediate; | |
862 | r->descriptor.key = a->key; | |
97c18b7f | 863 | r->descriptor.data = r->data; |
66dea3e5 | 864 | |
97c18b7f | 865 | ret = fw_core_add_descriptor(&r->descriptor); |
45ee3199 JF |
866 | if (ret < 0) |
867 | goto failed; | |
66dea3e5 | 868 | |
97c18b7f SR |
869 | r->resource.release = release_descriptor; |
870 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 871 | if (ret < 0) { |
97c18b7f | 872 | fw_core_remove_descriptor(&r->descriptor); |
45ee3199 JF |
873 | goto failed; |
874 | } | |
6e95dea7 | 875 | a->handle = r->resource.handle; |
66dea3e5 KH |
876 | |
877 | return 0; | |
45ee3199 | 878 | failed: |
97c18b7f | 879 | kfree(r); |
45ee3199 JF |
880 | |
881 | return ret; | |
66dea3e5 KH |
882 | } |
883 | ||
6e95dea7 | 884 | static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 885 | { |
6e95dea7 | 886 | return release_client_resource(client, arg->remove_descriptor.handle, |
45ee3199 | 887 | release_descriptor, NULL); |
66dea3e5 KH |
888 | } |
889 | ||
53dca511 SR |
890 | static void iso_callback(struct fw_iso_context *context, u32 cycle, |
891 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
892 | { |
893 | struct client *client = data; | |
97c18b7f | 894 | struct iso_interrupt_event *e; |
19a15b93 | 895 | |
56d04cb1 | 896 | e = kmalloc(sizeof(*e) + header_length, GFP_ATOMIC); |
97c18b7f | 897 | if (e == NULL) |
19a15b93 KH |
898 | return; |
899 | ||
97c18b7f SR |
900 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
901 | e->interrupt.closure = client->iso_closure; | |
902 | e->interrupt.cycle = cycle; | |
903 | e->interrupt.header_length = header_length; | |
904 | memcpy(e->interrupt.header, header, header_length); | |
905 | queue_event(client, &e->event, &e->interrupt, | |
906 | sizeof(e->interrupt) + header_length, NULL, 0); | |
19a15b93 KH |
907 | } |
908 | ||
6e95dea7 | 909 | static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) |
19a15b93 | 910 | { |
6e95dea7 | 911 | struct fw_cdev_create_iso_context *a = &arg->create_iso_context; |
24315c5e | 912 | struct fw_iso_context *context; |
19a15b93 | 913 | |
eb5b35a5 SR |
914 | BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT != FW_ISO_CONTEXT_TRANSMIT || |
915 | FW_CDEV_ISO_CONTEXT_RECEIVE != FW_ISO_CONTEXT_RECEIVE); | |
916 | ||
6e95dea7 | 917 | if (a->channel > 63) |
21efb3cf KH |
918 | return -EINVAL; |
919 | ||
6e95dea7 | 920 | switch (a->type) { |
c70dc788 | 921 | case FW_ISO_CONTEXT_RECEIVE: |
6e95dea7 | 922 | if (a->header_size < 4 || (a->header_size & 3)) |
c70dc788 | 923 | return -EINVAL; |
c70dc788 KH |
924 | break; |
925 | ||
926 | case FW_ISO_CONTEXT_TRANSMIT: | |
6e95dea7 | 927 | if (a->speed > SCODE_3200) |
c70dc788 | 928 | return -EINVAL; |
c70dc788 KH |
929 | break; |
930 | ||
931 | default: | |
21efb3cf | 932 | return -EINVAL; |
c70dc788 KH |
933 | } |
934 | ||
6e95dea7 SR |
935 | context = fw_iso_context_create(client->device->card, a->type, |
936 | a->channel, a->speed, a->header_size, | |
937 | iso_callback, client); | |
24315c5e KH |
938 | if (IS_ERR(context)) |
939 | return PTR_ERR(context); | |
940 | ||
bdfe273e CL |
941 | /* We only support one context at this time. */ |
942 | spin_lock_irq(&client->lock); | |
943 | if (client->iso_context != NULL) { | |
944 | spin_unlock_irq(&client->lock); | |
945 | fw_iso_context_destroy(context); | |
946 | return -EBUSY; | |
947 | } | |
6e95dea7 | 948 | client->iso_closure = a->closure; |
24315c5e | 949 | client->iso_context = context; |
bdfe273e | 950 | spin_unlock_irq(&client->lock); |
19a15b93 | 951 | |
6e95dea7 | 952 | a->handle = 0; |
abaa5743 | 953 | |
19a15b93 KH |
954 | return 0; |
955 | } | |
956 | ||
1ca31ae7 KH |
957 | /* Macros for decoding the iso packet control header. */ |
958 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) | |
959 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) | |
960 | #define GET_SKIP(v) (((v) >> 17) & 0x01) | |
7a100344 SR |
961 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
962 | #define GET_SY(v) (((v) >> 20) & 0x0f) | |
1ca31ae7 KH |
963 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
964 | ||
6e95dea7 | 965 | static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 966 | { |
6e95dea7 | 967 | struct fw_cdev_queue_iso *a = &arg->queue_iso; |
19a15b93 | 968 | struct fw_cdev_iso_packet __user *p, *end, *next; |
9b32d5f3 | 969 | struct fw_iso_context *ctx = client->iso_context; |
ef370ee7 | 970 | unsigned long payload, buffer_end, header_length; |
1ca31ae7 | 971 | u32 control; |
19a15b93 KH |
972 | int count; |
973 | struct { | |
974 | struct fw_iso_packet packet; | |
975 | u8 header[256]; | |
976 | } u; | |
977 | ||
6e95dea7 | 978 | if (ctx == NULL || a->handle != 0) |
19a15b93 | 979 | return -EINVAL; |
19a15b93 | 980 | |
c781c06d KH |
981 | /* |
982 | * If the user passes a non-NULL data pointer, has mmap()'ed | |
19a15b93 KH |
983 | * the iso buffer, and the pointer points inside the buffer, |
984 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 985 | * set them both to 0, which will still let packets with |
19a15b93 KH |
986 | * payload_length == 0 through. In other words, if no packets |
987 | * use the indirect payload, the iso buffer need not be mapped | |
6e95dea7 | 988 | * and the a->data pointer is ignored. |
c781c06d | 989 | */ |
19a15b93 | 990 | |
6e95dea7 | 991 | payload = (unsigned long)a->data - client->vm_start; |
ef370ee7 | 992 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
6e95dea7 | 993 | if (a->data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 994 | payload >= buffer_end) { |
9aad8125 | 995 | payload = 0; |
ef370ee7 | 996 | buffer_end = 0; |
19a15b93 KH |
997 | } |
998 | ||
6e95dea7 | 999 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets); |
1ccc9147 | 1000 | |
6e95dea7 | 1001 | if (!access_ok(VERIFY_READ, p, a->size)) |
19a15b93 KH |
1002 | return -EFAULT; |
1003 | ||
6e95dea7 | 1004 | end = (void __user *)p + a->size; |
19a15b93 KH |
1005 | count = 0; |
1006 | while (p < end) { | |
1ca31ae7 | 1007 | if (get_user(control, &p->control)) |
19a15b93 | 1008 | return -EFAULT; |
1ca31ae7 KH |
1009 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
1010 | u.packet.interrupt = GET_INTERRUPT(control); | |
1011 | u.packet.skip = GET_SKIP(control); | |
1012 | u.packet.tag = GET_TAG(control); | |
1013 | u.packet.sy = GET_SY(control); | |
1014 | u.packet.header_length = GET_HEADER_LENGTH(control); | |
295e3feb | 1015 | |
9b32d5f3 | 1016 | if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) { |
385ab5bc CL |
1017 | if (u.packet.header_length % 4 != 0) |
1018 | return -EINVAL; | |
295e3feb KH |
1019 | header_length = u.packet.header_length; |
1020 | } else { | |
c781c06d KH |
1021 | /* |
1022 | * We require that header_length is a multiple of | |
1023 | * the fixed header size, ctx->header_size. | |
1024 | */ | |
9b32d5f3 KH |
1025 | if (ctx->header_size == 0) { |
1026 | if (u.packet.header_length > 0) | |
1027 | return -EINVAL; | |
4ba1d9c0 CL |
1028 | } else if (u.packet.header_length == 0 || |
1029 | u.packet.header_length % ctx->header_size != 0) { | |
295e3feb | 1030 | return -EINVAL; |
9b32d5f3 | 1031 | } |
295e3feb KH |
1032 | header_length = 0; |
1033 | } | |
1034 | ||
19a15b93 | 1035 | next = (struct fw_cdev_iso_packet __user *) |
295e3feb | 1036 | &p->header[header_length / 4]; |
19a15b93 KH |
1037 | if (next > end) |
1038 | return -EINVAL; | |
1039 | if (__copy_from_user | |
295e3feb | 1040 | (u.packet.header, p->header, header_length)) |
19a15b93 | 1041 | return -EFAULT; |
98b6cbe8 | 1042 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
1043 | u.packet.header_length + u.packet.payload_length > 0) |
1044 | return -EINVAL; | |
ef370ee7 | 1045 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
1046 | return -EINVAL; |
1047 | ||
9b32d5f3 KH |
1048 | if (fw_iso_context_queue(ctx, &u.packet, |
1049 | &client->buffer, payload)) | |
19a15b93 KH |
1050 | break; |
1051 | ||
1052 | p = next; | |
1053 | payload += u.packet.payload_length; | |
1054 | count++; | |
1055 | } | |
1056 | ||
6e95dea7 SR |
1057 | a->size -= uptr_to_u64(p) - a->packets; |
1058 | a->packets = uptr_to_u64(p); | |
1059 | a->data = client->vm_start + payload; | |
19a15b93 KH |
1060 | |
1061 | return count; | |
1062 | } | |
1063 | ||
6e95dea7 | 1064 | static int ioctl_start_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1065 | { |
6e95dea7 | 1066 | struct fw_cdev_start_iso *a = &arg->start_iso; |
19a15b93 | 1067 | |
eb5b35a5 SR |
1068 | BUILD_BUG_ON( |
1069 | FW_CDEV_ISO_CONTEXT_MATCH_TAG0 != FW_ISO_CONTEXT_MATCH_TAG0 || | |
1070 | FW_CDEV_ISO_CONTEXT_MATCH_TAG1 != FW_ISO_CONTEXT_MATCH_TAG1 || | |
1071 | FW_CDEV_ISO_CONTEXT_MATCH_TAG2 != FW_ISO_CONTEXT_MATCH_TAG2 || | |
1072 | FW_CDEV_ISO_CONTEXT_MATCH_TAG3 != FW_ISO_CONTEXT_MATCH_TAG3 || | |
1073 | FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS != FW_ISO_CONTEXT_MATCH_ALL_TAGS); | |
1074 | ||
6e95dea7 | 1075 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 | 1076 | return -EINVAL; |
fae60312 | 1077 | |
6e95dea7 SR |
1078 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE && |
1079 | (a->tags == 0 || a->tags > 15 || a->sync > 15)) | |
1080 | return -EINVAL; | |
eb0306ea | 1081 | |
6e95dea7 SR |
1082 | return fw_iso_context_start(client->iso_context, |
1083 | a->cycle, a->sync, a->tags); | |
19a15b93 KH |
1084 | } |
1085 | ||
6e95dea7 | 1086 | static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg) |
b8295668 | 1087 | { |
6e95dea7 | 1088 | struct fw_cdev_stop_iso *a = &arg->stop_iso; |
abaa5743 | 1089 | |
6e95dea7 | 1090 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 KH |
1091 | return -EINVAL; |
1092 | ||
b8295668 KH |
1093 | return fw_iso_context_stop(client->iso_context); |
1094 | } | |
1095 | ||
6e95dea7 | 1096 | static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg) |
a64408b9 | 1097 | { |
6e95dea7 | 1098 | struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2; |
a64408b9 | 1099 | struct fw_card *card = client->device->card; |
abfe5a01 | 1100 | struct timespec ts = {0, 0}; |
4a9bde9b | 1101 | u32 cycle_time; |
abfe5a01 | 1102 | int ret = 0; |
a64408b9 | 1103 | |
4a9bde9b | 1104 | local_irq_disable(); |
a64408b9 | 1105 | |
0fcff4e3 | 1106 | cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME); |
abfe5a01 | 1107 | |
6e95dea7 | 1108 | switch (a->clk_id) { |
abfe5a01 SR |
1109 | case CLOCK_REALTIME: getnstimeofday(&ts); break; |
1110 | case CLOCK_MONOTONIC: do_posix_clock_monotonic_gettime(&ts); break; | |
1111 | case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts); break; | |
1112 | default: | |
1113 | ret = -EINVAL; | |
1114 | } | |
a64408b9 | 1115 | |
4a9bde9b | 1116 | local_irq_enable(); |
a64408b9 | 1117 | |
6e95dea7 SR |
1118 | a->tv_sec = ts.tv_sec; |
1119 | a->tv_nsec = ts.tv_nsec; | |
1120 | a->cycle_timer = cycle_time; | |
abfe5a01 SR |
1121 | |
1122 | return ret; | |
1123 | } | |
1124 | ||
6e95dea7 | 1125 | static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg) |
abfe5a01 | 1126 | { |
6e95dea7 | 1127 | struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer; |
abfe5a01 SR |
1128 | struct fw_cdev_get_cycle_timer2 ct2; |
1129 | ||
1130 | ct2.clk_id = CLOCK_REALTIME; | |
6e95dea7 | 1131 | ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2); |
abfe5a01 | 1132 | |
6e95dea7 SR |
1133 | a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC; |
1134 | a->cycle_timer = ct2.cycle_timer; | |
4a9bde9b | 1135 | |
a64408b9 SR |
1136 | return 0; |
1137 | } | |
1138 | ||
b1bda4cd JFSR |
1139 | static void iso_resource_work(struct work_struct *work) |
1140 | { | |
1141 | struct iso_resource_event *e; | |
1142 | struct iso_resource *r = | |
1143 | container_of(work, struct iso_resource, work.work); | |
1144 | struct client *client = r->client; | |
1145 | int generation, channel, bandwidth, todo; | |
1146 | bool skip, free, success; | |
1147 | ||
1148 | spin_lock_irq(&client->lock); | |
1149 | generation = client->device->generation; | |
1150 | todo = r->todo; | |
1151 | /* Allow 1000ms grace period for other reallocations. */ | |
1152 | if (todo == ISO_RES_ALLOC && | |
1153 | time_is_after_jiffies(client->device->card->reset_jiffies + HZ)) { | |
9fb551bf | 1154 | schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3)); |
b1bda4cd JFSR |
1155 | skip = true; |
1156 | } else { | |
1157 | /* We could be called twice within the same generation. */ | |
1158 | skip = todo == ISO_RES_REALLOC && | |
1159 | r->generation == generation; | |
1160 | } | |
1ec3c026 SR |
1161 | free = todo == ISO_RES_DEALLOC || |
1162 | todo == ISO_RES_ALLOC_ONCE || | |
1163 | todo == ISO_RES_DEALLOC_ONCE; | |
b1bda4cd JFSR |
1164 | r->generation = generation; |
1165 | spin_unlock_irq(&client->lock); | |
1166 | ||
1167 | if (skip) | |
1168 | goto out; | |
1169 | ||
1170 | bandwidth = r->bandwidth; | |
1171 | ||
1172 | fw_iso_resource_manage(client->device->card, generation, | |
1173 | r->channels, &channel, &bandwidth, | |
1ec3c026 SR |
1174 | todo == ISO_RES_ALLOC || |
1175 | todo == ISO_RES_REALLOC || | |
6fdc0370 SR |
1176 | todo == ISO_RES_ALLOC_ONCE, |
1177 | r->transaction_data); | |
b1bda4cd JFSR |
1178 | /* |
1179 | * Is this generation outdated already? As long as this resource sticks | |
1180 | * in the idr, it will be scheduled again for a newer generation or at | |
1181 | * shutdown. | |
1182 | */ | |
1183 | if (channel == -EAGAIN && | |
1184 | (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC)) | |
1185 | goto out; | |
1186 | ||
1187 | success = channel >= 0 || bandwidth > 0; | |
1188 | ||
1189 | spin_lock_irq(&client->lock); | |
1190 | /* | |
1191 | * Transit from allocation to reallocation, except if the client | |
1192 | * requested deallocation in the meantime. | |
1193 | */ | |
1194 | if (r->todo == ISO_RES_ALLOC) | |
1195 | r->todo = ISO_RES_REALLOC; | |
1196 | /* | |
1197 | * Allocation or reallocation failure? Pull this resource out of the | |
1198 | * idr and prepare for deletion, unless the client is shutting down. | |
1199 | */ | |
1200 | if (r->todo == ISO_RES_REALLOC && !success && | |
1201 | !client->in_shutdown && | |
1202 | idr_find(&client->resource_idr, r->resource.handle)) { | |
1203 | idr_remove(&client->resource_idr, r->resource.handle); | |
1204 | client_put(client); | |
1205 | free = true; | |
1206 | } | |
1207 | spin_unlock_irq(&client->lock); | |
1208 | ||
1209 | if (todo == ISO_RES_ALLOC && channel >= 0) | |
5d9cb7d2 | 1210 | r->channels = 1ULL << channel; |
b1bda4cd JFSR |
1211 | |
1212 | if (todo == ISO_RES_REALLOC && success) | |
1213 | goto out; | |
1214 | ||
1ec3c026 | 1215 | if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) { |
b1bda4cd JFSR |
1216 | e = r->e_alloc; |
1217 | r->e_alloc = NULL; | |
1218 | } else { | |
1219 | e = r->e_dealloc; | |
1220 | r->e_dealloc = NULL; | |
1221 | } | |
e21fcf79 SR |
1222 | e->iso_resource.handle = r->resource.handle; |
1223 | e->iso_resource.channel = channel; | |
1224 | e->iso_resource.bandwidth = bandwidth; | |
b1bda4cd JFSR |
1225 | |
1226 | queue_event(client, &e->event, | |
e21fcf79 | 1227 | &e->iso_resource, sizeof(e->iso_resource), NULL, 0); |
b1bda4cd JFSR |
1228 | |
1229 | if (free) { | |
1230 | cancel_delayed_work(&r->work); | |
1231 | kfree(r->e_alloc); | |
1232 | kfree(r->e_dealloc); | |
1233 | kfree(r); | |
1234 | } | |
1235 | out: | |
1236 | client_put(client); | |
1237 | } | |
1238 | ||
b1bda4cd JFSR |
1239 | static void release_iso_resource(struct client *client, |
1240 | struct client_resource *resource) | |
1241 | { | |
1242 | struct iso_resource *r = | |
1243 | container_of(resource, struct iso_resource, resource); | |
1244 | ||
1245 | spin_lock_irq(&client->lock); | |
1246 | r->todo = ISO_RES_DEALLOC; | |
9fb551bf | 1247 | schedule_iso_resource(r, 0); |
b1bda4cd JFSR |
1248 | spin_unlock_irq(&client->lock); |
1249 | } | |
1250 | ||
1ec3c026 SR |
1251 | static int init_iso_resource(struct client *client, |
1252 | struct fw_cdev_allocate_iso_resource *request, int todo) | |
b1bda4cd | 1253 | { |
b1bda4cd JFSR |
1254 | struct iso_resource_event *e1, *e2; |
1255 | struct iso_resource *r; | |
1256 | int ret; | |
1257 | ||
1258 | if ((request->channels == 0 && request->bandwidth == 0) || | |
1259 | request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL || | |
1260 | request->bandwidth < 0) | |
1261 | return -EINVAL; | |
1262 | ||
1263 | r = kmalloc(sizeof(*r), GFP_KERNEL); | |
1264 | e1 = kmalloc(sizeof(*e1), GFP_KERNEL); | |
1265 | e2 = kmalloc(sizeof(*e2), GFP_KERNEL); | |
1266 | if (r == NULL || e1 == NULL || e2 == NULL) { | |
1267 | ret = -ENOMEM; | |
1268 | goto fail; | |
1269 | } | |
1270 | ||
1271 | INIT_DELAYED_WORK(&r->work, iso_resource_work); | |
1272 | r->client = client; | |
1ec3c026 | 1273 | r->todo = todo; |
b1bda4cd JFSR |
1274 | r->generation = -1; |
1275 | r->channels = request->channels; | |
1276 | r->bandwidth = request->bandwidth; | |
1277 | r->e_alloc = e1; | |
1278 | r->e_dealloc = e2; | |
1279 | ||
e21fcf79 SR |
1280 | e1->iso_resource.closure = request->closure; |
1281 | e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED; | |
1282 | e2->iso_resource.closure = request->closure; | |
1283 | e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED; | |
b1bda4cd | 1284 | |
1ec3c026 SR |
1285 | if (todo == ISO_RES_ALLOC) { |
1286 | r->resource.release = release_iso_resource; | |
1287 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
81610b8f SR |
1288 | if (ret < 0) |
1289 | goto fail; | |
1ec3c026 SR |
1290 | } else { |
1291 | r->resource.release = NULL; | |
1292 | r->resource.handle = -1; | |
9fb551bf | 1293 | schedule_iso_resource(r, 0); |
1ec3c026 | 1294 | } |
b1bda4cd JFSR |
1295 | request->handle = r->resource.handle; |
1296 | ||
1297 | return 0; | |
1298 | fail: | |
1299 | kfree(r); | |
1300 | kfree(e1); | |
1301 | kfree(e2); | |
1302 | ||
1303 | return ret; | |
1304 | } | |
1305 | ||
6e95dea7 SR |
1306 | static int ioctl_allocate_iso_resource(struct client *client, |
1307 | union ioctl_arg *arg) | |
1ec3c026 | 1308 | { |
6e95dea7 SR |
1309 | return init_iso_resource(client, |
1310 | &arg->allocate_iso_resource, ISO_RES_ALLOC); | |
1ec3c026 SR |
1311 | } |
1312 | ||
6e95dea7 SR |
1313 | static int ioctl_deallocate_iso_resource(struct client *client, |
1314 | union ioctl_arg *arg) | |
b1bda4cd | 1315 | { |
6e95dea7 SR |
1316 | return release_client_resource(client, |
1317 | arg->deallocate.handle, release_iso_resource, NULL); | |
b1bda4cd JFSR |
1318 | } |
1319 | ||
6e95dea7 SR |
1320 | static int ioctl_allocate_iso_resource_once(struct client *client, |
1321 | union ioctl_arg *arg) | |
1ec3c026 | 1322 | { |
6e95dea7 SR |
1323 | return init_iso_resource(client, |
1324 | &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE); | |
1ec3c026 SR |
1325 | } |
1326 | ||
6e95dea7 SR |
1327 | static int ioctl_deallocate_iso_resource_once(struct client *client, |
1328 | union ioctl_arg *arg) | |
1ec3c026 | 1329 | { |
6e95dea7 SR |
1330 | return init_iso_resource(client, |
1331 | &arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE); | |
1ec3c026 SR |
1332 | } |
1333 | ||
c8a25900 SR |
1334 | /* |
1335 | * Returns a speed code: Maximum speed to or from this device, | |
1336 | * limited by the device's link speed, the local node's link speed, | |
1337 | * and all PHY port speeds between the two links. | |
1338 | */ | |
6e95dea7 | 1339 | static int ioctl_get_speed(struct client *client, union ioctl_arg *arg) |
33580a3e | 1340 | { |
c8a25900 | 1341 | return client->device->max_speed; |
33580a3e SR |
1342 | } |
1343 | ||
6e95dea7 SR |
1344 | static int ioctl_send_broadcast_request(struct client *client, |
1345 | union ioctl_arg *arg) | |
acfe8333 | 1346 | { |
6e95dea7 | 1347 | struct fw_cdev_send_request *a = &arg->send_request; |
acfe8333 | 1348 | |
6e95dea7 | 1349 | switch (a->tcode) { |
acfe8333 JFSR |
1350 | case TCODE_WRITE_QUADLET_REQUEST: |
1351 | case TCODE_WRITE_BLOCK_REQUEST: | |
1352 | break; | |
1353 | default: | |
1354 | return -EINVAL; | |
1355 | } | |
1356 | ||
1566f3dc | 1357 | /* Security policy: Only allow accesses to Units Space. */ |
6e95dea7 | 1358 | if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END) |
1566f3dc SR |
1359 | return -EACCES; |
1360 | ||
6e95dea7 | 1361 | return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100); |
acfe8333 JFSR |
1362 | } |
1363 | ||
6e95dea7 | 1364 | static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg) |
f8c2287c | 1365 | { |
6e95dea7 | 1366 | struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet; |
18e9b10f SR |
1367 | struct fw_cdev_send_request request; |
1368 | int dest; | |
f8c2287c | 1369 | |
6e95dea7 SR |
1370 | if (a->speed > client->device->card->link_speed || |
1371 | a->length > 1024 << a->speed) | |
18e9b10f | 1372 | return -EIO; |
f8c2287c | 1373 | |
6e95dea7 | 1374 | if (a->tag > 3 || a->channel > 63 || a->sy > 15) |
18e9b10f SR |
1375 | return -EINVAL; |
1376 | ||
6e95dea7 | 1377 | dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy); |
18e9b10f | 1378 | request.tcode = TCODE_STREAM_DATA; |
6e95dea7 SR |
1379 | request.length = a->length; |
1380 | request.closure = a->closure; | |
1381 | request.data = a->data; | |
1382 | request.generation = a->generation; | |
18e9b10f | 1383 | |
6e95dea7 | 1384 | return init_request(client, &request, dest, a->speed); |
f8c2287c JF |
1385 | } |
1386 | ||
6e95dea7 | 1387 | static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = { |
b9dc61cf SR |
1388 | [0x00] = ioctl_get_info, |
1389 | [0x01] = ioctl_send_request, | |
1390 | [0x02] = ioctl_allocate, | |
1391 | [0x03] = ioctl_deallocate, | |
1392 | [0x04] = ioctl_send_response, | |
1393 | [0x05] = ioctl_initiate_bus_reset, | |
1394 | [0x06] = ioctl_add_descriptor, | |
1395 | [0x07] = ioctl_remove_descriptor, | |
1396 | [0x08] = ioctl_create_iso_context, | |
1397 | [0x09] = ioctl_queue_iso, | |
1398 | [0x0a] = ioctl_start_iso, | |
1399 | [0x0b] = ioctl_stop_iso, | |
1400 | [0x0c] = ioctl_get_cycle_timer, | |
1401 | [0x0d] = ioctl_allocate_iso_resource, | |
1402 | [0x0e] = ioctl_deallocate_iso_resource, | |
1403 | [0x0f] = ioctl_allocate_iso_resource_once, | |
1404 | [0x10] = ioctl_deallocate_iso_resource_once, | |
1405 | [0x11] = ioctl_get_speed, | |
1406 | [0x12] = ioctl_send_broadcast_request, | |
1407 | [0x13] = ioctl_send_stream_packet, | |
1408 | [0x14] = ioctl_get_cycle_timer2, | |
4f259223 KH |
1409 | }; |
1410 | ||
53dca511 SR |
1411 | static int dispatch_ioctl(struct client *client, |
1412 | unsigned int cmd, void __user *arg) | |
19a15b93 | 1413 | { |
6e95dea7 | 1414 | union ioctl_arg buffer; |
2dbd7d7e | 1415 | int ret; |
4f259223 | 1416 | |
64582298 SR |
1417 | if (fw_device_is_shutdown(client->device)) |
1418 | return -ENODEV; | |
1419 | ||
4f259223 | 1420 | if (_IOC_TYPE(cmd) != '#' || |
9cac00b8 SR |
1421 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) || |
1422 | _IOC_SIZE(cmd) > sizeof(buffer)) | |
19a15b93 | 1423 | return -EINVAL; |
4f259223 | 1424 | |
9cac00b8 SR |
1425 | if (_IOC_DIR(cmd) == _IOC_READ) |
1426 | memset(&buffer, 0, _IOC_SIZE(cmd)); | |
1427 | ||
1428 | if (_IOC_DIR(cmd) & _IOC_WRITE) | |
1429 | if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd))) | |
4f259223 | 1430 | return -EFAULT; |
4f259223 | 1431 | |
6e95dea7 | 1432 | ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer); |
2dbd7d7e SR |
1433 | if (ret < 0) |
1434 | return ret; | |
4f259223 | 1435 | |
9cac00b8 SR |
1436 | if (_IOC_DIR(cmd) & _IOC_READ) |
1437 | if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd))) | |
4f259223 | 1438 | return -EFAULT; |
4f259223 | 1439 | |
2dbd7d7e | 1440 | return ret; |
19a15b93 KH |
1441 | } |
1442 | ||
53dca511 SR |
1443 | static long fw_device_op_ioctl(struct file *file, |
1444 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1445 | { |
64582298 | 1446 | return dispatch_ioctl(file->private_data, cmd, (void __user *)arg); |
19a15b93 KH |
1447 | } |
1448 | ||
1449 | #ifdef CONFIG_COMPAT | |
53dca511 SR |
1450 | static long fw_device_op_compat_ioctl(struct file *file, |
1451 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1452 | { |
64582298 | 1453 | return dispatch_ioctl(file->private_data, cmd, compat_ptr(arg)); |
19a15b93 KH |
1454 | } |
1455 | #endif | |
1456 | ||
1457 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
1458 | { | |
1459 | struct client *client = file->private_data; | |
9aad8125 KH |
1460 | enum dma_data_direction direction; |
1461 | unsigned long size; | |
2dbd7d7e | 1462 | int page_count, ret; |
9aad8125 | 1463 | |
551f4cb9 JF |
1464 | if (fw_device_is_shutdown(client->device)) |
1465 | return -ENODEV; | |
1466 | ||
9aad8125 KH |
1467 | /* FIXME: We could support multiple buffers, but we don't. */ |
1468 | if (client->buffer.pages != NULL) | |
1469 | return -EBUSY; | |
1470 | ||
1471 | if (!(vma->vm_flags & VM_SHARED)) | |
1472 | return -EINVAL; | |
19a15b93 | 1473 | |
9aad8125 | 1474 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
1475 | return -EINVAL; |
1476 | ||
1477 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
1478 | size = vma->vm_end - vma->vm_start; |
1479 | page_count = size >> PAGE_SHIFT; | |
1480 | if (size & ~PAGE_MASK) | |
1481 | return -EINVAL; | |
1482 | ||
1483 | if (vma->vm_flags & VM_WRITE) | |
1484 | direction = DMA_TO_DEVICE; | |
1485 | else | |
1486 | direction = DMA_FROM_DEVICE; | |
1487 | ||
2dbd7d7e SR |
1488 | ret = fw_iso_buffer_init(&client->buffer, client->device->card, |
1489 | page_count, direction); | |
1490 | if (ret < 0) | |
1491 | return ret; | |
19a15b93 | 1492 | |
2dbd7d7e SR |
1493 | ret = fw_iso_buffer_map(&client->buffer, vma); |
1494 | if (ret < 0) | |
9aad8125 KH |
1495 | fw_iso_buffer_destroy(&client->buffer, client->device->card); |
1496 | ||
2dbd7d7e | 1497 | return ret; |
19a15b93 KH |
1498 | } |
1499 | ||
45ee3199 JF |
1500 | static int shutdown_resource(int id, void *p, void *data) |
1501 | { | |
e21fcf79 | 1502 | struct client_resource *resource = p; |
45ee3199 JF |
1503 | struct client *client = data; |
1504 | ||
e21fcf79 | 1505 | resource->release(client, resource); |
fb443036 | 1506 | client_put(client); |
45ee3199 JF |
1507 | |
1508 | return 0; | |
1509 | } | |
1510 | ||
19a15b93 KH |
1511 | static int fw_device_op_release(struct inode *inode, struct file *file) |
1512 | { | |
1513 | struct client *client = file->private_data; | |
e21fcf79 | 1514 | struct event *event, *next_event; |
19a15b93 | 1515 | |
97811e34 SR |
1516 | mutex_lock(&client->device->client_list_mutex); |
1517 | list_del(&client->link); | |
1518 | mutex_unlock(&client->device->client_list_mutex); | |
1519 | ||
19a15b93 KH |
1520 | if (client->iso_context) |
1521 | fw_iso_context_destroy(client->iso_context); | |
1522 | ||
36a755cf SR |
1523 | if (client->buffer.pages) |
1524 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
1525 | ||
45ee3199 | 1526 | /* Freeze client->resource_idr and client->event_list */ |
3ba94986 | 1527 | spin_lock_irq(&client->lock); |
45ee3199 | 1528 | client->in_shutdown = true; |
3ba94986 | 1529 | spin_unlock_irq(&client->lock); |
66dea3e5 | 1530 | |
45ee3199 JF |
1531 | idr_for_each(&client->resource_idr, shutdown_resource, client); |
1532 | idr_remove_all(&client->resource_idr); | |
1533 | idr_destroy(&client->resource_idr); | |
28cf6a04 | 1534 | |
e21fcf79 SR |
1535 | list_for_each_entry_safe(event, next_event, &client->event_list, link) |
1536 | kfree(event); | |
19a15b93 | 1537 | |
fb443036 | 1538 | client_put(client); |
19a15b93 KH |
1539 | |
1540 | return 0; | |
1541 | } | |
1542 | ||
1543 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
1544 | { | |
1545 | struct client *client = file->private_data; | |
2603bf21 | 1546 | unsigned int mask = 0; |
19a15b93 KH |
1547 | |
1548 | poll_wait(file, &client->wait, pt); | |
1549 | ||
2603bf21 KH |
1550 | if (fw_device_is_shutdown(client->device)) |
1551 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 1552 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
1553 | mask |= POLLIN | POLLRDNORM; |
1554 | ||
1555 | return mask; | |
19a15b93 KH |
1556 | } |
1557 | ||
21ebcd12 | 1558 | const struct file_operations fw_device_ops = { |
19a15b93 | 1559 | .owner = THIS_MODULE, |
3ac26b2e | 1560 | .llseek = no_llseek, |
19a15b93 KH |
1561 | .open = fw_device_op_open, |
1562 | .read = fw_device_op_read, | |
1563 | .unlocked_ioctl = fw_device_op_ioctl, | |
19a15b93 | 1564 | .mmap = fw_device_op_mmap, |
3ac26b2e SR |
1565 | .release = fw_device_op_release, |
1566 | .poll = fw_device_op_poll, | |
19a15b93 | 1567 | #ifdef CONFIG_COMPAT |
5af4e5ea | 1568 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
1569 | #endif |
1570 | }; |