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> | |
b1bda4cd | 28 | #include <linux/jiffies.h> |
19a15b93 | 29 | #include <linux/kernel.h> |
fb443036 | 30 | #include <linux/kref.h> |
be5bbd67 SR |
31 | #include <linux/mm.h> |
32 | #include <linux/module.h> | |
d67cfb96 | 33 | #include <linux/mutex.h> |
19a15b93 | 34 | #include <linux/poll.h> |
a64408b9 | 35 | #include <linux/preempt.h> |
a99bbaf5 | 36 | #include <linux/sched.h> |
cf417e54 | 37 | #include <linux/spinlock.h> |
be5bbd67 | 38 | #include <linux/time.h> |
e034d242 | 39 | #include <linux/uaccess.h> |
be5bbd67 SR |
40 | #include <linux/vmalloc.h> |
41 | #include <linux/wait.h> | |
b1bda4cd | 42 | #include <linux/workqueue.h> |
be5bbd67 | 43 | |
a64408b9 | 44 | #include <asm/system.h> |
be5bbd67 | 45 | |
77c9a5da | 46 | #include "core.h" |
19a15b93 | 47 | |
19a15b93 | 48 | struct client { |
344bbc4d | 49 | u32 version; |
19a15b93 | 50 | struct fw_device *device; |
45ee3199 | 51 | |
19a15b93 | 52 | spinlock_t lock; |
45ee3199 JF |
53 | bool in_shutdown; |
54 | struct idr resource_idr; | |
19a15b93 | 55 | struct list_head event_list; |
19a15b93 | 56 | wait_queue_head_t wait; |
da8ecffa | 57 | u64 bus_reset_closure; |
9aad8125 | 58 | |
19a15b93 | 59 | struct fw_iso_context *iso_context; |
abaa5743 | 60 | u64 iso_closure; |
9aad8125 KH |
61 | struct fw_iso_buffer buffer; |
62 | unsigned long vm_start; | |
97bd9efa KH |
63 | |
64 | struct list_head link; | |
fb443036 | 65 | struct kref kref; |
19a15b93 KH |
66 | }; |
67 | ||
fb443036 SR |
68 | static inline void client_get(struct client *client) |
69 | { | |
70 | kref_get(&client->kref); | |
71 | } | |
72 | ||
73 | static void client_release(struct kref *kref) | |
74 | { | |
75 | struct client *client = container_of(kref, struct client, kref); | |
76 | ||
77 | fw_device_put(client->device); | |
78 | kfree(client); | |
79 | } | |
80 | ||
81 | static void client_put(struct client *client) | |
82 | { | |
83 | kref_put(&client->kref, client_release); | |
84 | } | |
85 | ||
97c18b7f SR |
86 | struct client_resource; |
87 | typedef void (*client_resource_release_fn_t)(struct client *, | |
88 | struct client_resource *); | |
89 | struct client_resource { | |
90 | client_resource_release_fn_t release; | |
91 | int handle; | |
92 | }; | |
93 | ||
94 | struct address_handler_resource { | |
95 | struct client_resource resource; | |
96 | struct fw_address_handler handler; | |
97 | __u64 closure; | |
98 | struct client *client; | |
99 | }; | |
100 | ||
101 | struct outbound_transaction_resource { | |
102 | struct client_resource resource; | |
103 | struct fw_transaction transaction; | |
104 | }; | |
105 | ||
106 | struct inbound_transaction_resource { | |
107 | struct client_resource resource; | |
108 | struct fw_request *request; | |
109 | void *data; | |
110 | size_t length; | |
111 | }; | |
112 | ||
113 | struct descriptor_resource { | |
114 | struct client_resource resource; | |
115 | struct fw_descriptor descriptor; | |
116 | u32 data[0]; | |
117 | }; | |
118 | ||
b1bda4cd JFSR |
119 | struct iso_resource { |
120 | struct client_resource resource; | |
121 | struct client *client; | |
122 | /* Schedule work and access todo only with client->lock held. */ | |
123 | struct delayed_work work; | |
1ec3c026 SR |
124 | enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC, |
125 | ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo; | |
b1bda4cd JFSR |
126 | int generation; |
127 | u64 channels; | |
128 | s32 bandwidth; | |
6fdc0370 | 129 | __be32 transaction_data[2]; |
b1bda4cd JFSR |
130 | struct iso_resource_event *e_alloc, *e_dealloc; |
131 | }; | |
132 | ||
b1bda4cd JFSR |
133 | static void release_iso_resource(struct client *, struct client_resource *); |
134 | ||
9fb551bf SR |
135 | static void schedule_iso_resource(struct iso_resource *r, unsigned long delay) |
136 | { | |
137 | client_get(r->client); | |
138 | if (!schedule_delayed_work(&r->work, delay)) | |
139 | client_put(r->client); | |
140 | } | |
141 | ||
142 | static void schedule_if_iso_resource(struct client_resource *resource) | |
143 | { | |
144 | if (resource->release == release_iso_resource) | |
145 | schedule_iso_resource(container_of(resource, | |
146 | struct iso_resource, resource), 0); | |
147 | } | |
148 | ||
97c18b7f SR |
149 | /* |
150 | * dequeue_event() just kfree()'s the event, so the event has to be | |
151 | * the first field in a struct XYZ_event. | |
152 | */ | |
153 | struct event { | |
154 | struct { void *data; size_t size; } v[2]; | |
155 | struct list_head link; | |
156 | }; | |
157 | ||
158 | struct bus_reset_event { | |
159 | struct event event; | |
160 | struct fw_cdev_event_bus_reset reset; | |
161 | }; | |
162 | ||
163 | struct outbound_transaction_event { | |
164 | struct event event; | |
165 | struct client *client; | |
166 | struct outbound_transaction_resource r; | |
167 | struct fw_cdev_event_response response; | |
168 | }; | |
169 | ||
170 | struct inbound_transaction_event { | |
171 | struct event event; | |
172 | struct fw_cdev_event_request request; | |
173 | }; | |
174 | ||
175 | struct iso_interrupt_event { | |
176 | struct event event; | |
177 | struct fw_cdev_event_iso_interrupt interrupt; | |
178 | }; | |
179 | ||
b1bda4cd JFSR |
180 | struct iso_resource_event { |
181 | struct event event; | |
e21fcf79 | 182 | struct fw_cdev_event_iso_resource iso_resource; |
b1bda4cd JFSR |
183 | }; |
184 | ||
53dca511 | 185 | static inline void __user *u64_to_uptr(__u64 value) |
19a15b93 KH |
186 | { |
187 | return (void __user *)(unsigned long)value; | |
188 | } | |
189 | ||
53dca511 | 190 | static inline __u64 uptr_to_u64(void __user *ptr) |
19a15b93 KH |
191 | { |
192 | return (__u64)(unsigned long)ptr; | |
193 | } | |
194 | ||
195 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
196 | { | |
197 | struct fw_device *device; | |
198 | struct client *client; | |
199 | ||
96b19062 | 200 | device = fw_device_get_by_devt(inode->i_rdev); |
a3aca3da KH |
201 | if (device == NULL) |
202 | return -ENODEV; | |
19a15b93 | 203 | |
551f4cb9 JF |
204 | if (fw_device_is_shutdown(device)) { |
205 | fw_device_put(device); | |
206 | return -ENODEV; | |
207 | } | |
208 | ||
2d826cc5 | 209 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
96b19062 SR |
210 | if (client == NULL) { |
211 | fw_device_put(device); | |
19a15b93 | 212 | return -ENOMEM; |
96b19062 | 213 | } |
19a15b93 | 214 | |
96b19062 | 215 | client->device = device; |
19a15b93 | 216 | spin_lock_init(&client->lock); |
45ee3199 JF |
217 | idr_init(&client->resource_idr); |
218 | INIT_LIST_HEAD(&client->event_list); | |
19a15b93 | 219 | init_waitqueue_head(&client->wait); |
fb443036 | 220 | kref_init(&client->kref); |
19a15b93 KH |
221 | |
222 | file->private_data = client; | |
223 | ||
d67cfb96 | 224 | mutex_lock(&device->client_list_mutex); |
97bd9efa | 225 | list_add_tail(&client->link, &device->client_list); |
d67cfb96 | 226 | mutex_unlock(&device->client_list_mutex); |
97bd9efa | 227 | |
19a15b93 KH |
228 | return 0; |
229 | } | |
230 | ||
231 | static void queue_event(struct client *client, struct event *event, | |
232 | void *data0, size_t size0, void *data1, size_t size1) | |
233 | { | |
234 | unsigned long flags; | |
235 | ||
236 | event->v[0].data = data0; | |
237 | event->v[0].size = size0; | |
238 | event->v[1].data = data1; | |
239 | event->v[1].size = size1; | |
240 | ||
241 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
242 | if (client->in_shutdown) |
243 | kfree(event); | |
244 | else | |
245 | list_add_tail(&event->link, &client->event_list); | |
19a15b93 | 246 | spin_unlock_irqrestore(&client->lock, flags); |
83431cba JF |
247 | |
248 | wake_up_interruptible(&client->wait); | |
19a15b93 KH |
249 | } |
250 | ||
53dca511 SR |
251 | static int dequeue_event(struct client *client, |
252 | char __user *buffer, size_t count) | |
19a15b93 | 253 | { |
19a15b93 KH |
254 | struct event *event; |
255 | size_t size, total; | |
2dbd7d7e | 256 | int i, ret; |
19a15b93 | 257 | |
2dbd7d7e SR |
258 | ret = wait_event_interruptible(client->wait, |
259 | !list_empty(&client->event_list) || | |
260 | fw_device_is_shutdown(client->device)); | |
261 | if (ret < 0) | |
262 | return ret; | |
19a15b93 | 263 | |
2603bf21 KH |
264 | if (list_empty(&client->event_list) && |
265 | fw_device_is_shutdown(client->device)) | |
266 | return -ENODEV; | |
19a15b93 | 267 | |
3ba94986 | 268 | spin_lock_irq(&client->lock); |
a459b8ab | 269 | event = list_first_entry(&client->event_list, struct event, link); |
19a15b93 | 270 | list_del(&event->link); |
3ba94986 | 271 | spin_unlock_irq(&client->lock); |
19a15b93 | 272 | |
19a15b93 KH |
273 | total = 0; |
274 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
275 | size = min(event->v[i].size, count - total); | |
2603bf21 | 276 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
2dbd7d7e | 277 | ret = -EFAULT; |
19a15b93 | 278 | goto out; |
2603bf21 | 279 | } |
19a15b93 KH |
280 | total += size; |
281 | } | |
2dbd7d7e | 282 | ret = total; |
19a15b93 KH |
283 | |
284 | out: | |
285 | kfree(event); | |
286 | ||
2dbd7d7e | 287 | return ret; |
19a15b93 KH |
288 | } |
289 | ||
53dca511 SR |
290 | static ssize_t fw_device_op_read(struct file *file, char __user *buffer, |
291 | size_t count, loff_t *offset) | |
19a15b93 KH |
292 | { |
293 | struct client *client = file->private_data; | |
294 | ||
295 | return dequeue_event(client, buffer, count); | |
296 | } | |
297 | ||
53dca511 SR |
298 | static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, |
299 | struct client *client) | |
344bbc4d | 300 | { |
da8ecffa | 301 | struct fw_card *card = client->device->card; |
cf417e54 | 302 | |
3ba94986 | 303 | spin_lock_irq(&card->lock); |
344bbc4d | 304 | |
da8ecffa | 305 | event->closure = client->bus_reset_closure; |
344bbc4d | 306 | event->type = FW_CDEV_EVENT_BUS_RESET; |
cf5a56ac | 307 | event->generation = client->device->generation; |
da8ecffa | 308 | event->node_id = client->device->node_id; |
344bbc4d KH |
309 | event->local_node_id = card->local_node->node_id; |
310 | event->bm_node_id = 0; /* FIXME: We don't track the BM. */ | |
311 | event->irm_node_id = card->irm_node->node_id; | |
312 | event->root_node_id = card->root_node->node_id; | |
cf417e54 | 313 | |
3ba94986 | 314 | spin_unlock_irq(&card->lock); |
344bbc4d KH |
315 | } |
316 | ||
53dca511 SR |
317 | static void for_each_client(struct fw_device *device, |
318 | void (*callback)(struct client *client)) | |
2603bf21 | 319 | { |
2603bf21 | 320 | struct client *c; |
2603bf21 | 321 | |
d67cfb96 | 322 | mutex_lock(&device->client_list_mutex); |
2603bf21 KH |
323 | list_for_each_entry(c, &device->client_list, link) |
324 | callback(c); | |
d67cfb96 | 325 | mutex_unlock(&device->client_list_mutex); |
2603bf21 KH |
326 | } |
327 | ||
b1bda4cd JFSR |
328 | static int schedule_reallocations(int id, void *p, void *data) |
329 | { | |
9fb551bf | 330 | schedule_if_iso_resource(p); |
b1bda4cd | 331 | |
b1bda4cd JFSR |
332 | return 0; |
333 | } | |
334 | ||
53dca511 | 335 | static void queue_bus_reset_event(struct client *client) |
97bd9efa | 336 | { |
97c18b7f | 337 | struct bus_reset_event *e; |
97bd9efa | 338 | |
97c18b7f SR |
339 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
340 | if (e == NULL) { | |
97bd9efa KH |
341 | fw_notify("Out of memory when allocating bus reset event\n"); |
342 | return; | |
343 | } | |
344 | ||
97c18b7f | 345 | fill_bus_reset_event(&e->reset, client); |
97bd9efa | 346 | |
97c18b7f SR |
347 | queue_event(client, &e->event, |
348 | &e->reset, sizeof(e->reset), NULL, 0); | |
b1bda4cd JFSR |
349 | |
350 | spin_lock_irq(&client->lock); | |
351 | idr_for_each(&client->resource_idr, schedule_reallocations, client); | |
352 | spin_unlock_irq(&client->lock); | |
97bd9efa KH |
353 | } |
354 | ||
355 | void fw_device_cdev_update(struct fw_device *device) | |
356 | { | |
2603bf21 KH |
357 | for_each_client(device, queue_bus_reset_event); |
358 | } | |
97bd9efa | 359 | |
2603bf21 KH |
360 | static void wake_up_client(struct client *client) |
361 | { | |
362 | wake_up_interruptible(&client->wait); | |
363 | } | |
97bd9efa | 364 | |
2603bf21 KH |
365 | void fw_device_cdev_remove(struct fw_device *device) |
366 | { | |
367 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
368 | } |
369 | ||
4f259223 | 370 | static int ioctl_get_info(struct client *client, void *buffer) |
19a15b93 | 371 | { |
4f259223 | 372 | struct fw_cdev_get_info *get_info = buffer; |
344bbc4d | 373 | struct fw_cdev_event_bus_reset bus_reset; |
c9755e14 | 374 | unsigned long ret = 0; |
344bbc4d | 375 | |
4f259223 KH |
376 | client->version = get_info->version; |
377 | get_info->version = FW_CDEV_VERSION; | |
cf417e54 | 378 | get_info->card = client->device->card->index; |
344bbc4d | 379 | |
c9755e14 SR |
380 | down_read(&fw_device_rwsem); |
381 | ||
4f259223 KH |
382 | if (get_info->rom != 0) { |
383 | void __user *uptr = u64_to_uptr(get_info->rom); | |
384 | size_t want = get_info->rom_length; | |
d84702a5 | 385 | size_t have = client->device->config_rom_length * 4; |
344bbc4d | 386 | |
c9755e14 SR |
387 | ret = copy_to_user(uptr, client->device->config_rom, |
388 | min(want, have)); | |
344bbc4d | 389 | } |
4f259223 | 390 | get_info->rom_length = client->device->config_rom_length * 4; |
344bbc4d | 391 | |
c9755e14 SR |
392 | up_read(&fw_device_rwsem); |
393 | ||
394 | if (ret != 0) | |
395 | return -EFAULT; | |
396 | ||
4f259223 KH |
397 | client->bus_reset_closure = get_info->bus_reset_closure; |
398 | if (get_info->bus_reset != 0) { | |
399 | void __user *uptr = u64_to_uptr(get_info->bus_reset); | |
344bbc4d | 400 | |
da8ecffa | 401 | fill_bus_reset_event(&bus_reset, client); |
2d826cc5 | 402 | if (copy_to_user(uptr, &bus_reset, sizeof(bus_reset))) |
344bbc4d KH |
403 | return -EFAULT; |
404 | } | |
19a15b93 | 405 | |
19a15b93 KH |
406 | return 0; |
407 | } | |
408 | ||
53dca511 SR |
409 | static int add_client_resource(struct client *client, |
410 | struct client_resource *resource, gfp_t gfp_mask) | |
3964a449 KH |
411 | { |
412 | unsigned long flags; | |
45ee3199 JF |
413 | int ret; |
414 | ||
415 | retry: | |
416 | if (idr_pre_get(&client->resource_idr, gfp_mask) == 0) | |
417 | return -ENOMEM; | |
3964a449 KH |
418 | |
419 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
420 | if (client->in_shutdown) |
421 | ret = -ECANCELED; | |
422 | else | |
423 | ret = idr_get_new(&client->resource_idr, resource, | |
424 | &resource->handle); | |
b1bda4cd | 425 | if (ret >= 0) { |
fb443036 | 426 | client_get(client); |
9fb551bf | 427 | schedule_if_iso_resource(resource); |
b1bda4cd | 428 | } |
3964a449 | 429 | spin_unlock_irqrestore(&client->lock, flags); |
45ee3199 JF |
430 | |
431 | if (ret == -EAGAIN) | |
432 | goto retry; | |
433 | ||
434 | return ret < 0 ? ret : 0; | |
3964a449 KH |
435 | } |
436 | ||
53dca511 SR |
437 | static int release_client_resource(struct client *client, u32 handle, |
438 | client_resource_release_fn_t release, | |
e21fcf79 | 439 | struct client_resource **return_resource) |
3964a449 | 440 | { |
e21fcf79 | 441 | struct client_resource *resource; |
3964a449 | 442 | |
3ba94986 | 443 | spin_lock_irq(&client->lock); |
45ee3199 | 444 | if (client->in_shutdown) |
e21fcf79 | 445 | resource = NULL; |
45ee3199 | 446 | else |
e21fcf79 SR |
447 | resource = idr_find(&client->resource_idr, handle); |
448 | if (resource && resource->release == release) | |
45ee3199 | 449 | idr_remove(&client->resource_idr, handle); |
3ba94986 | 450 | spin_unlock_irq(&client->lock); |
3964a449 | 451 | |
e21fcf79 | 452 | if (!(resource && resource->release == release)) |
3964a449 KH |
453 | return -EINVAL; |
454 | ||
e21fcf79 SR |
455 | if (return_resource) |
456 | *return_resource = resource; | |
3964a449 | 457 | else |
e21fcf79 | 458 | resource->release(client, resource); |
3964a449 | 459 | |
fb443036 SR |
460 | client_put(client); |
461 | ||
3964a449 KH |
462 | return 0; |
463 | } | |
464 | ||
53dca511 SR |
465 | static void release_transaction(struct client *client, |
466 | struct client_resource *resource) | |
3964a449 | 467 | { |
97c18b7f SR |
468 | struct outbound_transaction_resource *r = container_of(resource, |
469 | struct outbound_transaction_resource, resource); | |
3964a449 | 470 | |
97c18b7f | 471 | fw_cancel_transaction(client->device->card, &r->transaction); |
3964a449 KH |
472 | } |
473 | ||
53dca511 SR |
474 | static void complete_transaction(struct fw_card *card, int rcode, |
475 | void *payload, size_t length, void *data) | |
19a15b93 | 476 | { |
97c18b7f SR |
477 | struct outbound_transaction_event *e = data; |
478 | struct fw_cdev_event_response *rsp = &e->response; | |
479 | struct client *client = e->client; | |
28cf6a04 | 480 | unsigned long flags; |
19a15b93 | 481 | |
97c18b7f SR |
482 | if (length < rsp->length) |
483 | rsp->length = length; | |
19a15b93 | 484 | if (rcode == RCODE_COMPLETE) |
97c18b7f | 485 | memcpy(rsp->data, payload, rsp->length); |
19a15b93 | 486 | |
28cf6a04 | 487 | spin_lock_irqsave(&client->lock, flags); |
45ee3199 | 488 | /* |
fb443036 SR |
489 | * 1. If called while in shutdown, the idr tree must be left untouched. |
490 | * The idr handle will be removed and the client reference will be | |
491 | * dropped later. | |
492 | * 2. If the call chain was release_client_resource -> | |
493 | * release_transaction -> complete_transaction (instead of a normal | |
494 | * conclusion of the transaction), i.e. if this resource was already | |
495 | * unregistered from the idr, the client reference will be dropped | |
496 | * by release_client_resource and we must not drop it here. | |
45ee3199 | 497 | */ |
fb443036 | 498 | if (!client->in_shutdown && |
97c18b7f SR |
499 | idr_find(&client->resource_idr, e->r.resource.handle)) { |
500 | idr_remove(&client->resource_idr, e->r.resource.handle); | |
fb443036 SR |
501 | /* Drop the idr's reference */ |
502 | client_put(client); | |
503 | } | |
28cf6a04 KH |
504 | spin_unlock_irqrestore(&client->lock, flags); |
505 | ||
97c18b7f SR |
506 | rsp->type = FW_CDEV_EVENT_RESPONSE; |
507 | rsp->rcode = rcode; | |
8401d92b DM |
508 | |
509 | /* | |
97c18b7f | 510 | * In the case that sizeof(*rsp) doesn't align with the position of the |
8401d92b DM |
511 | * data, and the read is short, preserve an extra copy of the data |
512 | * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless | |
513 | * for short reads and some apps depended on it, this is both safe | |
514 | * and prudent for compatibility. | |
515 | */ | |
97c18b7f SR |
516 | if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data)) |
517 | queue_event(client, &e->event, rsp, sizeof(*rsp), | |
518 | rsp->data, rsp->length); | |
8401d92b | 519 | else |
97c18b7f | 520 | queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length, |
8401d92b | 521 | NULL, 0); |
fb443036 SR |
522 | |
523 | /* Drop the transaction callback's reference */ | |
524 | client_put(client); | |
19a15b93 KH |
525 | } |
526 | ||
acfe8333 JFSR |
527 | static int init_request(struct client *client, |
528 | struct fw_cdev_send_request *request, | |
529 | int destination_id, int speed) | |
19a15b93 | 530 | { |
97c18b7f | 531 | struct outbound_transaction_event *e; |
1f3125af | 532 | int ret; |
19a15b93 | 533 | |
18e9b10f SR |
534 | if (request->tcode != TCODE_STREAM_DATA && |
535 | (request->length > 4096 || request->length > 512 << speed)) | |
5d3fd692 | 536 | return -EIO; |
19a15b93 | 537 | |
97c18b7f SR |
538 | e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL); |
539 | if (e == NULL) | |
19a15b93 KH |
540 | return -ENOMEM; |
541 | ||
97c18b7f SR |
542 | e->client = client; |
543 | e->response.length = request->length; | |
544 | e->response.closure = request->closure; | |
19a15b93 | 545 | |
4f259223 | 546 | if (request->data && |
97c18b7f | 547 | copy_from_user(e->response.data, |
4f259223 | 548 | u64_to_uptr(request->data), request->length)) { |
1f3125af | 549 | ret = -EFAULT; |
45ee3199 | 550 | goto failed; |
1f3125af SR |
551 | } |
552 | ||
97c18b7f SR |
553 | e->r.resource.release = release_transaction; |
554 | ret = add_client_resource(client, &e->r.resource, GFP_KERNEL); | |
45ee3199 JF |
555 | if (ret < 0) |
556 | goto failed; | |
28cf6a04 | 557 | |
fb443036 SR |
558 | /* Get a reference for the transaction callback */ |
559 | client_get(client); | |
560 | ||
acfe8333 | 561 | fw_send_request(client->device->card, &e->r.transaction, |
664d8010 SR |
562 | request->tcode, destination_id, request->generation, |
563 | speed, request->offset, e->response.data, | |
564 | request->length, complete_transaction, e); | |
565 | return 0; | |
19a15b93 | 566 | |
45ee3199 | 567 | failed: |
97c18b7f | 568 | kfree(e); |
1f3125af SR |
569 | |
570 | return ret; | |
19a15b93 KH |
571 | } |
572 | ||
acfe8333 JFSR |
573 | static int ioctl_send_request(struct client *client, void *buffer) |
574 | { | |
575 | struct fw_cdev_send_request *request = buffer; | |
576 | ||
577 | switch (request->tcode) { | |
578 | case TCODE_WRITE_QUADLET_REQUEST: | |
579 | case TCODE_WRITE_BLOCK_REQUEST: | |
580 | case TCODE_READ_QUADLET_REQUEST: | |
581 | case TCODE_READ_BLOCK_REQUEST: | |
582 | case TCODE_LOCK_MASK_SWAP: | |
583 | case TCODE_LOCK_COMPARE_SWAP: | |
584 | case TCODE_LOCK_FETCH_ADD: | |
585 | case TCODE_LOCK_LITTLE_ADD: | |
586 | case TCODE_LOCK_BOUNDED_ADD: | |
587 | case TCODE_LOCK_WRAP_ADD: | |
588 | case TCODE_LOCK_VENDOR_DEPENDENT: | |
589 | break; | |
590 | default: | |
591 | return -EINVAL; | |
592 | } | |
593 | ||
207fbefb | 594 | return init_request(client, request, client->device->node_id, |
acfe8333 JFSR |
595 | client->device->max_speed); |
596 | } | |
597 | ||
53dca511 SR |
598 | static void release_request(struct client *client, |
599 | struct client_resource *resource) | |
3964a449 | 600 | { |
97c18b7f SR |
601 | struct inbound_transaction_resource *r = container_of(resource, |
602 | struct inbound_transaction_resource, resource); | |
3964a449 | 603 | |
db5d247a CL |
604 | if (r->request) |
605 | fw_send_response(client->device->card, r->request, | |
606 | RCODE_CONFLICT_ERROR); | |
97c18b7f | 607 | kfree(r); |
3964a449 KH |
608 | } |
609 | ||
97c18b7f | 610 | static void handle_request(struct fw_card *card, struct fw_request *request, |
53dca511 SR |
611 | int tcode, int destination, int source, |
612 | int generation, int speed, | |
613 | unsigned long long offset, | |
614 | void *payload, size_t length, void *callback_data) | |
19a15b93 | 615 | { |
97c18b7f SR |
616 | struct address_handler_resource *handler = callback_data; |
617 | struct inbound_transaction_resource *r; | |
618 | struct inbound_transaction_event *e; | |
45ee3199 | 619 | int ret; |
19a15b93 | 620 | |
97c18b7f | 621 | r = kmalloc(sizeof(*r), GFP_ATOMIC); |
2d826cc5 | 622 | e = kmalloc(sizeof(*e), GFP_ATOMIC); |
97c18b7f | 623 | if (r == NULL || e == NULL) |
45ee3199 | 624 | goto failed; |
19a15b93 | 625 | |
97c18b7f SR |
626 | r->request = request; |
627 | r->data = payload; | |
628 | r->length = length; | |
19a15b93 | 629 | |
97c18b7f SR |
630 | r->resource.release = release_request; |
631 | ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC); | |
45ee3199 JF |
632 | if (ret < 0) |
633 | goto failed; | |
19a15b93 KH |
634 | |
635 | e->request.type = FW_CDEV_EVENT_REQUEST; | |
636 | e->request.tcode = tcode; | |
637 | e->request.offset = offset; | |
638 | e->request.length = length; | |
97c18b7f | 639 | e->request.handle = r->resource.handle; |
19a15b93 KH |
640 | e->request.closure = handler->closure; |
641 | ||
97c18b7f | 642 | queue_event(handler->client, &e->event, |
2d826cc5 | 643 | &e->request, sizeof(e->request), payload, length); |
45ee3199 JF |
644 | return; |
645 | ||
646 | failed: | |
97c18b7f | 647 | kfree(r); |
45ee3199 | 648 | kfree(e); |
db5d247a CL |
649 | if (request) |
650 | fw_send_response(card, request, RCODE_CONFLICT_ERROR); | |
19a15b93 KH |
651 | } |
652 | ||
53dca511 SR |
653 | static void release_address_handler(struct client *client, |
654 | struct client_resource *resource) | |
3964a449 | 655 | { |
97c18b7f SR |
656 | struct address_handler_resource *r = |
657 | container_of(resource, struct address_handler_resource, resource); | |
3964a449 | 658 | |
97c18b7f SR |
659 | fw_core_remove_address_handler(&r->handler); |
660 | kfree(r); | |
3964a449 KH |
661 | } |
662 | ||
4f259223 | 663 | static int ioctl_allocate(struct client *client, void *buffer) |
19a15b93 | 664 | { |
4f259223 | 665 | struct fw_cdev_allocate *request = buffer; |
97c18b7f | 666 | struct address_handler_resource *r; |
19a15b93 | 667 | struct fw_address_region region; |
45ee3199 | 668 | int ret; |
19a15b93 | 669 | |
97c18b7f SR |
670 | r = kmalloc(sizeof(*r), GFP_KERNEL); |
671 | if (r == NULL) | |
19a15b93 KH |
672 | return -ENOMEM; |
673 | ||
4f259223 KH |
674 | region.start = request->offset; |
675 | region.end = request->offset + request->length; | |
97c18b7f SR |
676 | r->handler.length = request->length; |
677 | r->handler.address_callback = handle_request; | |
678 | r->handler.callback_data = r; | |
679 | r->closure = request->closure; | |
680 | r->client = client; | |
19a15b93 | 681 | |
97c18b7f | 682 | ret = fw_core_add_address_handler(&r->handler, ®ion); |
3e0b5f0d | 683 | if (ret < 0) { |
97c18b7f | 684 | kfree(r); |
3e0b5f0d | 685 | return ret; |
19a15b93 KH |
686 | } |
687 | ||
97c18b7f SR |
688 | r->resource.release = release_address_handler; |
689 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 690 | if (ret < 0) { |
97c18b7f | 691 | release_address_handler(client, &r->resource); |
45ee3199 JF |
692 | return ret; |
693 | } | |
97c18b7f | 694 | request->handle = r->resource.handle; |
19a15b93 KH |
695 | |
696 | return 0; | |
697 | } | |
698 | ||
4f259223 | 699 | static int ioctl_deallocate(struct client *client, void *buffer) |
9472316b | 700 | { |
4f259223 | 701 | struct fw_cdev_deallocate *request = buffer; |
9472316b | 702 | |
45ee3199 JF |
703 | return release_client_resource(client, request->handle, |
704 | release_address_handler, NULL); | |
9472316b KH |
705 | } |
706 | ||
4f259223 | 707 | static int ioctl_send_response(struct client *client, void *buffer) |
19a15b93 | 708 | { |
4f259223 | 709 | struct fw_cdev_send_response *request = buffer; |
3964a449 | 710 | struct client_resource *resource; |
97c18b7f | 711 | struct inbound_transaction_resource *r; |
7e44c0b5 | 712 | int ret = 0; |
19a15b93 | 713 | |
45ee3199 JF |
714 | if (release_client_resource(client, request->handle, |
715 | release_request, &resource) < 0) | |
19a15b93 | 716 | return -EINVAL; |
45ee3199 | 717 | |
97c18b7f SR |
718 | r = container_of(resource, struct inbound_transaction_resource, |
719 | resource); | |
db5d247a CL |
720 | if (r->request) { |
721 | if (request->length < r->length) | |
722 | r->length = request->length; | |
723 | if (copy_from_user(r->data, u64_to_uptr(request->data), | |
724 | r->length)) { | |
725 | ret = -EFAULT; | |
cf0e575d | 726 | kfree(r->request); |
db5d247a CL |
727 | goto out; |
728 | } | |
729 | fw_send_response(client->device->card, r->request, | |
730 | request->rcode); | |
7e44c0b5 | 731 | } |
7e44c0b5 | 732 | out: |
19a15b93 KH |
733 | kfree(r); |
734 | ||
7e44c0b5 | 735 | return ret; |
19a15b93 KH |
736 | } |
737 | ||
4f259223 | 738 | static int ioctl_initiate_bus_reset(struct client *client, void *buffer) |
5371842b | 739 | { |
4f259223 | 740 | struct fw_cdev_initiate_bus_reset *request = buffer; |
5371842b KH |
741 | int short_reset; |
742 | ||
4f259223 | 743 | short_reset = (request->type == FW_CDEV_SHORT_RESET); |
5371842b KH |
744 | |
745 | return fw_core_initiate_bus_reset(client->device->card, short_reset); | |
746 | } | |
747 | ||
3964a449 KH |
748 | static void release_descriptor(struct client *client, |
749 | struct client_resource *resource) | |
750 | { | |
97c18b7f SR |
751 | struct descriptor_resource *r = |
752 | container_of(resource, struct descriptor_resource, resource); | |
3964a449 | 753 | |
97c18b7f SR |
754 | fw_core_remove_descriptor(&r->descriptor); |
755 | kfree(r); | |
3964a449 KH |
756 | } |
757 | ||
4f259223 | 758 | static int ioctl_add_descriptor(struct client *client, void *buffer) |
66dea3e5 | 759 | { |
4f259223 | 760 | struct fw_cdev_add_descriptor *request = buffer; |
97c18b7f | 761 | struct descriptor_resource *r; |
45ee3199 | 762 | int ret; |
66dea3e5 | 763 | |
de487da8 | 764 | /* Access policy: Allow this ioctl only on local nodes' device files. */ |
92368890 | 765 | if (!client->device->is_local) |
de487da8 SR |
766 | return -ENOSYS; |
767 | ||
4f259223 | 768 | if (request->length > 256) |
66dea3e5 KH |
769 | return -EINVAL; |
770 | ||
97c18b7f SR |
771 | r = kmalloc(sizeof(*r) + request->length * 4, GFP_KERNEL); |
772 | if (r == NULL) | |
66dea3e5 KH |
773 | return -ENOMEM; |
774 | ||
97c18b7f | 775 | if (copy_from_user(r->data, |
4f259223 | 776 | u64_to_uptr(request->data), request->length * 4)) { |
45ee3199 JF |
777 | ret = -EFAULT; |
778 | goto failed; | |
66dea3e5 KH |
779 | } |
780 | ||
97c18b7f SR |
781 | r->descriptor.length = request->length; |
782 | r->descriptor.immediate = request->immediate; | |
783 | r->descriptor.key = request->key; | |
784 | r->descriptor.data = r->data; | |
66dea3e5 | 785 | |
97c18b7f | 786 | ret = fw_core_add_descriptor(&r->descriptor); |
45ee3199 JF |
787 | if (ret < 0) |
788 | goto failed; | |
66dea3e5 | 789 | |
97c18b7f SR |
790 | r->resource.release = release_descriptor; |
791 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 792 | if (ret < 0) { |
97c18b7f | 793 | fw_core_remove_descriptor(&r->descriptor); |
45ee3199 JF |
794 | goto failed; |
795 | } | |
97c18b7f | 796 | request->handle = r->resource.handle; |
66dea3e5 KH |
797 | |
798 | return 0; | |
45ee3199 | 799 | failed: |
97c18b7f | 800 | kfree(r); |
45ee3199 JF |
801 | |
802 | return ret; | |
66dea3e5 KH |
803 | } |
804 | ||
4f259223 | 805 | static int ioctl_remove_descriptor(struct client *client, void *buffer) |
66dea3e5 | 806 | { |
4f259223 | 807 | struct fw_cdev_remove_descriptor *request = buffer; |
66dea3e5 | 808 | |
45ee3199 JF |
809 | return release_client_resource(client, request->handle, |
810 | release_descriptor, NULL); | |
66dea3e5 KH |
811 | } |
812 | ||
53dca511 SR |
813 | static void iso_callback(struct fw_iso_context *context, u32 cycle, |
814 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
815 | { |
816 | struct client *client = data; | |
97c18b7f | 817 | struct iso_interrupt_event *e; |
19a15b93 | 818 | |
97c18b7f SR |
819 | e = kzalloc(sizeof(*e) + header_length, GFP_ATOMIC); |
820 | if (e == NULL) | |
19a15b93 KH |
821 | return; |
822 | ||
97c18b7f SR |
823 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
824 | e->interrupt.closure = client->iso_closure; | |
825 | e->interrupt.cycle = cycle; | |
826 | e->interrupt.header_length = header_length; | |
827 | memcpy(e->interrupt.header, header, header_length); | |
828 | queue_event(client, &e->event, &e->interrupt, | |
829 | sizeof(e->interrupt) + header_length, NULL, 0); | |
19a15b93 KH |
830 | } |
831 | ||
4f259223 | 832 | static int ioctl_create_iso_context(struct client *client, void *buffer) |
19a15b93 | 833 | { |
4f259223 | 834 | struct fw_cdev_create_iso_context *request = buffer; |
24315c5e | 835 | struct fw_iso_context *context; |
19a15b93 | 836 | |
fae60312 SR |
837 | /* We only support one context at this time. */ |
838 | if (client->iso_context != NULL) | |
839 | return -EBUSY; | |
840 | ||
4f259223 | 841 | if (request->channel > 63) |
21efb3cf KH |
842 | return -EINVAL; |
843 | ||
4f259223 | 844 | switch (request->type) { |
c70dc788 | 845 | case FW_ISO_CONTEXT_RECEIVE: |
4f259223 | 846 | if (request->header_size < 4 || (request->header_size & 3)) |
c70dc788 | 847 | return -EINVAL; |
98b6cbe8 | 848 | |
c70dc788 KH |
849 | break; |
850 | ||
851 | case FW_ISO_CONTEXT_TRANSMIT: | |
4f259223 | 852 | if (request->speed > SCODE_3200) |
c70dc788 KH |
853 | return -EINVAL; |
854 | ||
855 | break; | |
856 | ||
857 | default: | |
21efb3cf | 858 | return -EINVAL; |
c70dc788 KH |
859 | } |
860 | ||
24315c5e KH |
861 | context = fw_iso_context_create(client->device->card, |
862 | request->type, | |
863 | request->channel, | |
864 | request->speed, | |
865 | request->header_size, | |
866 | iso_callback, client); | |
867 | if (IS_ERR(context)) | |
868 | return PTR_ERR(context); | |
869 | ||
abaa5743 | 870 | client->iso_closure = request->closure; |
24315c5e | 871 | client->iso_context = context; |
19a15b93 | 872 | |
abaa5743 KH |
873 | /* We only support one context at this time. */ |
874 | request->handle = 0; | |
875 | ||
19a15b93 KH |
876 | return 0; |
877 | } | |
878 | ||
1ca31ae7 KH |
879 | /* Macros for decoding the iso packet control header. */ |
880 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) | |
881 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) | |
882 | #define GET_SKIP(v) (((v) >> 17) & 0x01) | |
7a100344 SR |
883 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
884 | #define GET_SY(v) (((v) >> 20) & 0x0f) | |
1ca31ae7 KH |
885 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
886 | ||
4f259223 | 887 | static int ioctl_queue_iso(struct client *client, void *buffer) |
19a15b93 | 888 | { |
4f259223 | 889 | struct fw_cdev_queue_iso *request = buffer; |
19a15b93 | 890 | struct fw_cdev_iso_packet __user *p, *end, *next; |
9b32d5f3 | 891 | struct fw_iso_context *ctx = client->iso_context; |
ef370ee7 | 892 | unsigned long payload, buffer_end, header_length; |
1ca31ae7 | 893 | u32 control; |
19a15b93 KH |
894 | int count; |
895 | struct { | |
896 | struct fw_iso_packet packet; | |
897 | u8 header[256]; | |
898 | } u; | |
899 | ||
abaa5743 | 900 | if (ctx == NULL || request->handle != 0) |
19a15b93 | 901 | return -EINVAL; |
19a15b93 | 902 | |
c781c06d KH |
903 | /* |
904 | * If the user passes a non-NULL data pointer, has mmap()'ed | |
19a15b93 KH |
905 | * the iso buffer, and the pointer points inside the buffer, |
906 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 907 | * set them both to 0, which will still let packets with |
19a15b93 KH |
908 | * payload_length == 0 through. In other words, if no packets |
909 | * use the indirect payload, the iso buffer need not be mapped | |
c781c06d KH |
910 | * and the request->data pointer is ignored. |
911 | */ | |
19a15b93 | 912 | |
4f259223 | 913 | payload = (unsigned long)request->data - client->vm_start; |
ef370ee7 | 914 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
4f259223 | 915 | if (request->data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 916 | payload >= buffer_end) { |
9aad8125 | 917 | payload = 0; |
ef370ee7 | 918 | buffer_end = 0; |
19a15b93 KH |
919 | } |
920 | ||
1ccc9147 AV |
921 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(request->packets); |
922 | ||
923 | if (!access_ok(VERIFY_READ, p, request->size)) | |
19a15b93 KH |
924 | return -EFAULT; |
925 | ||
4f259223 | 926 | end = (void __user *)p + request->size; |
19a15b93 KH |
927 | count = 0; |
928 | while (p < end) { | |
1ca31ae7 | 929 | if (get_user(control, &p->control)) |
19a15b93 | 930 | return -EFAULT; |
1ca31ae7 KH |
931 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
932 | u.packet.interrupt = GET_INTERRUPT(control); | |
933 | u.packet.skip = GET_SKIP(control); | |
934 | u.packet.tag = GET_TAG(control); | |
935 | u.packet.sy = GET_SY(control); | |
936 | u.packet.header_length = GET_HEADER_LENGTH(control); | |
295e3feb | 937 | |
9b32d5f3 | 938 | if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) { |
295e3feb KH |
939 | header_length = u.packet.header_length; |
940 | } else { | |
c781c06d KH |
941 | /* |
942 | * We require that header_length is a multiple of | |
943 | * the fixed header size, ctx->header_size. | |
944 | */ | |
9b32d5f3 KH |
945 | if (ctx->header_size == 0) { |
946 | if (u.packet.header_length > 0) | |
947 | return -EINVAL; | |
948 | } else if (u.packet.header_length % ctx->header_size != 0) { | |
295e3feb | 949 | return -EINVAL; |
9b32d5f3 | 950 | } |
295e3feb KH |
951 | header_length = 0; |
952 | } | |
953 | ||
19a15b93 | 954 | next = (struct fw_cdev_iso_packet __user *) |
295e3feb | 955 | &p->header[header_length / 4]; |
19a15b93 KH |
956 | if (next > end) |
957 | return -EINVAL; | |
958 | if (__copy_from_user | |
295e3feb | 959 | (u.packet.header, p->header, header_length)) |
19a15b93 | 960 | return -EFAULT; |
98b6cbe8 | 961 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
962 | u.packet.header_length + u.packet.payload_length > 0) |
963 | return -EINVAL; | |
ef370ee7 | 964 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
965 | return -EINVAL; |
966 | ||
9b32d5f3 KH |
967 | if (fw_iso_context_queue(ctx, &u.packet, |
968 | &client->buffer, payload)) | |
19a15b93 KH |
969 | break; |
970 | ||
971 | p = next; | |
972 | payload += u.packet.payload_length; | |
973 | count++; | |
974 | } | |
975 | ||
4f259223 KH |
976 | request->size -= uptr_to_u64(p) - request->packets; |
977 | request->packets = uptr_to_u64(p); | |
978 | request->data = client->vm_start + payload; | |
19a15b93 KH |
979 | |
980 | return count; | |
981 | } | |
982 | ||
4f259223 | 983 | static int ioctl_start_iso(struct client *client, void *buffer) |
19a15b93 | 984 | { |
4f259223 | 985 | struct fw_cdev_start_iso *request = buffer; |
19a15b93 | 986 | |
fae60312 | 987 | if (client->iso_context == NULL || request->handle != 0) |
abaa5743 | 988 | return -EINVAL; |
fae60312 | 989 | |
eb0306ea | 990 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE) { |
4f259223 | 991 | if (request->tags == 0 || request->tags > 15) |
eb0306ea KH |
992 | return -EINVAL; |
993 | ||
4f259223 | 994 | if (request->sync > 15) |
eb0306ea KH |
995 | return -EINVAL; |
996 | } | |
997 | ||
4f259223 KH |
998 | return fw_iso_context_start(client->iso_context, request->cycle, |
999 | request->sync, request->tags); | |
19a15b93 KH |
1000 | } |
1001 | ||
4f259223 | 1002 | static int ioctl_stop_iso(struct client *client, void *buffer) |
b8295668 | 1003 | { |
abaa5743 KH |
1004 | struct fw_cdev_stop_iso *request = buffer; |
1005 | ||
fae60312 | 1006 | if (client->iso_context == NULL || request->handle != 0) |
abaa5743 KH |
1007 | return -EINVAL; |
1008 | ||
b8295668 KH |
1009 | return fw_iso_context_stop(client->iso_context); |
1010 | } | |
1011 | ||
a64408b9 SR |
1012 | static int ioctl_get_cycle_timer(struct client *client, void *buffer) |
1013 | { | |
1014 | struct fw_cdev_get_cycle_timer *request = buffer; | |
1015 | struct fw_card *card = client->device->card; | |
1016 | unsigned long long bus_time; | |
1017 | struct timeval tv; | |
1018 | unsigned long flags; | |
1019 | ||
1020 | preempt_disable(); | |
1021 | local_irq_save(flags); | |
1022 | ||
1023 | bus_time = card->driver->get_bus_time(card); | |
1024 | do_gettimeofday(&tv); | |
1025 | ||
1026 | local_irq_restore(flags); | |
1027 | preempt_enable(); | |
1028 | ||
1029 | request->local_time = tv.tv_sec * 1000000ULL + tv.tv_usec; | |
1030 | request->cycle_timer = bus_time & 0xffffffff; | |
1031 | return 0; | |
1032 | } | |
1033 | ||
b1bda4cd JFSR |
1034 | static void iso_resource_work(struct work_struct *work) |
1035 | { | |
1036 | struct iso_resource_event *e; | |
1037 | struct iso_resource *r = | |
1038 | container_of(work, struct iso_resource, work.work); | |
1039 | struct client *client = r->client; | |
1040 | int generation, channel, bandwidth, todo; | |
1041 | bool skip, free, success; | |
1042 | ||
1043 | spin_lock_irq(&client->lock); | |
1044 | generation = client->device->generation; | |
1045 | todo = r->todo; | |
1046 | /* Allow 1000ms grace period for other reallocations. */ | |
1047 | if (todo == ISO_RES_ALLOC && | |
1048 | time_is_after_jiffies(client->device->card->reset_jiffies + HZ)) { | |
9fb551bf | 1049 | schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3)); |
b1bda4cd JFSR |
1050 | skip = true; |
1051 | } else { | |
1052 | /* We could be called twice within the same generation. */ | |
1053 | skip = todo == ISO_RES_REALLOC && | |
1054 | r->generation == generation; | |
1055 | } | |
1ec3c026 SR |
1056 | free = todo == ISO_RES_DEALLOC || |
1057 | todo == ISO_RES_ALLOC_ONCE || | |
1058 | todo == ISO_RES_DEALLOC_ONCE; | |
b1bda4cd JFSR |
1059 | r->generation = generation; |
1060 | spin_unlock_irq(&client->lock); | |
1061 | ||
1062 | if (skip) | |
1063 | goto out; | |
1064 | ||
1065 | bandwidth = r->bandwidth; | |
1066 | ||
1067 | fw_iso_resource_manage(client->device->card, generation, | |
1068 | r->channels, &channel, &bandwidth, | |
1ec3c026 SR |
1069 | todo == ISO_RES_ALLOC || |
1070 | todo == ISO_RES_REALLOC || | |
6fdc0370 SR |
1071 | todo == ISO_RES_ALLOC_ONCE, |
1072 | r->transaction_data); | |
b1bda4cd JFSR |
1073 | /* |
1074 | * Is this generation outdated already? As long as this resource sticks | |
1075 | * in the idr, it will be scheduled again for a newer generation or at | |
1076 | * shutdown. | |
1077 | */ | |
1078 | if (channel == -EAGAIN && | |
1079 | (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC)) | |
1080 | goto out; | |
1081 | ||
1082 | success = channel >= 0 || bandwidth > 0; | |
1083 | ||
1084 | spin_lock_irq(&client->lock); | |
1085 | /* | |
1086 | * Transit from allocation to reallocation, except if the client | |
1087 | * requested deallocation in the meantime. | |
1088 | */ | |
1089 | if (r->todo == ISO_RES_ALLOC) | |
1090 | r->todo = ISO_RES_REALLOC; | |
1091 | /* | |
1092 | * Allocation or reallocation failure? Pull this resource out of the | |
1093 | * idr and prepare for deletion, unless the client is shutting down. | |
1094 | */ | |
1095 | if (r->todo == ISO_RES_REALLOC && !success && | |
1096 | !client->in_shutdown && | |
1097 | idr_find(&client->resource_idr, r->resource.handle)) { | |
1098 | idr_remove(&client->resource_idr, r->resource.handle); | |
1099 | client_put(client); | |
1100 | free = true; | |
1101 | } | |
1102 | spin_unlock_irq(&client->lock); | |
1103 | ||
1104 | if (todo == ISO_RES_ALLOC && channel >= 0) | |
5d9cb7d2 | 1105 | r->channels = 1ULL << channel; |
b1bda4cd JFSR |
1106 | |
1107 | if (todo == ISO_RES_REALLOC && success) | |
1108 | goto out; | |
1109 | ||
1ec3c026 | 1110 | if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) { |
b1bda4cd JFSR |
1111 | e = r->e_alloc; |
1112 | r->e_alloc = NULL; | |
1113 | } else { | |
1114 | e = r->e_dealloc; | |
1115 | r->e_dealloc = NULL; | |
1116 | } | |
e21fcf79 SR |
1117 | e->iso_resource.handle = r->resource.handle; |
1118 | e->iso_resource.channel = channel; | |
1119 | e->iso_resource.bandwidth = bandwidth; | |
b1bda4cd JFSR |
1120 | |
1121 | queue_event(client, &e->event, | |
e21fcf79 | 1122 | &e->iso_resource, sizeof(e->iso_resource), NULL, 0); |
b1bda4cd JFSR |
1123 | |
1124 | if (free) { | |
1125 | cancel_delayed_work(&r->work); | |
1126 | kfree(r->e_alloc); | |
1127 | kfree(r->e_dealloc); | |
1128 | kfree(r); | |
1129 | } | |
1130 | out: | |
1131 | client_put(client); | |
1132 | } | |
1133 | ||
b1bda4cd JFSR |
1134 | static void release_iso_resource(struct client *client, |
1135 | struct client_resource *resource) | |
1136 | { | |
1137 | struct iso_resource *r = | |
1138 | container_of(resource, struct iso_resource, resource); | |
1139 | ||
1140 | spin_lock_irq(&client->lock); | |
1141 | r->todo = ISO_RES_DEALLOC; | |
9fb551bf | 1142 | schedule_iso_resource(r, 0); |
b1bda4cd JFSR |
1143 | spin_unlock_irq(&client->lock); |
1144 | } | |
1145 | ||
1ec3c026 SR |
1146 | static int init_iso_resource(struct client *client, |
1147 | struct fw_cdev_allocate_iso_resource *request, int todo) | |
b1bda4cd | 1148 | { |
b1bda4cd JFSR |
1149 | struct iso_resource_event *e1, *e2; |
1150 | struct iso_resource *r; | |
1151 | int ret; | |
1152 | ||
1153 | if ((request->channels == 0 && request->bandwidth == 0) || | |
1154 | request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL || | |
1155 | request->bandwidth < 0) | |
1156 | return -EINVAL; | |
1157 | ||
1158 | r = kmalloc(sizeof(*r), GFP_KERNEL); | |
1159 | e1 = kmalloc(sizeof(*e1), GFP_KERNEL); | |
1160 | e2 = kmalloc(sizeof(*e2), GFP_KERNEL); | |
1161 | if (r == NULL || e1 == NULL || e2 == NULL) { | |
1162 | ret = -ENOMEM; | |
1163 | goto fail; | |
1164 | } | |
1165 | ||
1166 | INIT_DELAYED_WORK(&r->work, iso_resource_work); | |
1167 | r->client = client; | |
1ec3c026 | 1168 | r->todo = todo; |
b1bda4cd JFSR |
1169 | r->generation = -1; |
1170 | r->channels = request->channels; | |
1171 | r->bandwidth = request->bandwidth; | |
1172 | r->e_alloc = e1; | |
1173 | r->e_dealloc = e2; | |
1174 | ||
e21fcf79 SR |
1175 | e1->iso_resource.closure = request->closure; |
1176 | e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED; | |
1177 | e2->iso_resource.closure = request->closure; | |
1178 | e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED; | |
b1bda4cd | 1179 | |
1ec3c026 SR |
1180 | if (todo == ISO_RES_ALLOC) { |
1181 | r->resource.release = release_iso_resource; | |
1182 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
81610b8f SR |
1183 | if (ret < 0) |
1184 | goto fail; | |
1ec3c026 SR |
1185 | } else { |
1186 | r->resource.release = NULL; | |
1187 | r->resource.handle = -1; | |
9fb551bf | 1188 | schedule_iso_resource(r, 0); |
1ec3c026 | 1189 | } |
b1bda4cd JFSR |
1190 | request->handle = r->resource.handle; |
1191 | ||
1192 | return 0; | |
1193 | fail: | |
1194 | kfree(r); | |
1195 | kfree(e1); | |
1196 | kfree(e2); | |
1197 | ||
1198 | return ret; | |
1199 | } | |
1200 | ||
1ec3c026 SR |
1201 | static int ioctl_allocate_iso_resource(struct client *client, void *buffer) |
1202 | { | |
1203 | struct fw_cdev_allocate_iso_resource *request = buffer; | |
1204 | ||
1205 | return init_iso_resource(client, request, ISO_RES_ALLOC); | |
1206 | } | |
1207 | ||
b1bda4cd JFSR |
1208 | static int ioctl_deallocate_iso_resource(struct client *client, void *buffer) |
1209 | { | |
1210 | struct fw_cdev_deallocate *request = buffer; | |
1211 | ||
1212 | return release_client_resource(client, request->handle, | |
1213 | release_iso_resource, NULL); | |
1214 | } | |
1215 | ||
1ec3c026 SR |
1216 | static int ioctl_allocate_iso_resource_once(struct client *client, void *buffer) |
1217 | { | |
1218 | struct fw_cdev_allocate_iso_resource *request = buffer; | |
1219 | ||
1220 | return init_iso_resource(client, request, ISO_RES_ALLOC_ONCE); | |
1221 | } | |
1222 | ||
1223 | static int ioctl_deallocate_iso_resource_once(struct client *client, void *buffer) | |
1224 | { | |
1225 | struct fw_cdev_allocate_iso_resource *request = buffer; | |
1226 | ||
1227 | return init_iso_resource(client, request, ISO_RES_DEALLOC_ONCE); | |
1228 | } | |
1229 | ||
c8a25900 SR |
1230 | /* |
1231 | * Returns a speed code: Maximum speed to or from this device, | |
1232 | * limited by the device's link speed, the local node's link speed, | |
1233 | * and all PHY port speeds between the two links. | |
1234 | */ | |
33580a3e SR |
1235 | static int ioctl_get_speed(struct client *client, void *buffer) |
1236 | { | |
c8a25900 | 1237 | return client->device->max_speed; |
33580a3e SR |
1238 | } |
1239 | ||
acfe8333 JFSR |
1240 | static int ioctl_send_broadcast_request(struct client *client, void *buffer) |
1241 | { | |
1242 | struct fw_cdev_send_request *request = buffer; | |
1243 | ||
1244 | switch (request->tcode) { | |
1245 | case TCODE_WRITE_QUADLET_REQUEST: | |
1246 | case TCODE_WRITE_BLOCK_REQUEST: | |
1247 | break; | |
1248 | default: | |
1249 | return -EINVAL; | |
1250 | } | |
1251 | ||
1566f3dc SR |
1252 | /* Security policy: Only allow accesses to Units Space. */ |
1253 | if (request->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END) | |
1254 | return -EACCES; | |
1255 | ||
acfe8333 JFSR |
1256 | return init_request(client, request, LOCAL_BUS | 0x3f, SCODE_100); |
1257 | } | |
1258 | ||
f8c2287c JF |
1259 | static int ioctl_send_stream_packet(struct client *client, void *buffer) |
1260 | { | |
18e9b10f SR |
1261 | struct fw_cdev_send_stream_packet *p = buffer; |
1262 | struct fw_cdev_send_request request; | |
1263 | int dest; | |
f8c2287c | 1264 | |
18e9b10f SR |
1265 | if (p->speed > client->device->card->link_speed || |
1266 | p->length > 1024 << p->speed) | |
1267 | return -EIO; | |
f8c2287c | 1268 | |
18e9b10f SR |
1269 | if (p->tag > 3 || p->channel > 63 || p->sy > 15) |
1270 | return -EINVAL; | |
1271 | ||
1272 | dest = fw_stream_packet_destination_id(p->tag, p->channel, p->sy); | |
1273 | request.tcode = TCODE_STREAM_DATA; | |
1274 | request.length = p->length; | |
1275 | request.closure = p->closure; | |
1276 | request.data = p->data; | |
1277 | request.generation = p->generation; | |
1278 | ||
1279 | return init_request(client, &request, dest, p->speed); | |
f8c2287c JF |
1280 | } |
1281 | ||
4f259223 KH |
1282 | static int (* const ioctl_handlers[])(struct client *client, void *buffer) = { |
1283 | ioctl_get_info, | |
1284 | ioctl_send_request, | |
1285 | ioctl_allocate, | |
1286 | ioctl_deallocate, | |
1287 | ioctl_send_response, | |
1288 | ioctl_initiate_bus_reset, | |
1289 | ioctl_add_descriptor, | |
1290 | ioctl_remove_descriptor, | |
1291 | ioctl_create_iso_context, | |
1292 | ioctl_queue_iso, | |
1293 | ioctl_start_iso, | |
1294 | ioctl_stop_iso, | |
a64408b9 | 1295 | ioctl_get_cycle_timer, |
b1bda4cd JFSR |
1296 | ioctl_allocate_iso_resource, |
1297 | ioctl_deallocate_iso_resource, | |
1ec3c026 SR |
1298 | ioctl_allocate_iso_resource_once, |
1299 | ioctl_deallocate_iso_resource_once, | |
33580a3e | 1300 | ioctl_get_speed, |
acfe8333 | 1301 | ioctl_send_broadcast_request, |
f8c2287c | 1302 | ioctl_send_stream_packet, |
4f259223 KH |
1303 | }; |
1304 | ||
53dca511 SR |
1305 | static int dispatch_ioctl(struct client *client, |
1306 | unsigned int cmd, void __user *arg) | |
19a15b93 | 1307 | { |
b2c0a2ac SR |
1308 | char buffer[sizeof(union { |
1309 | struct fw_cdev_get_info _00; | |
1310 | struct fw_cdev_send_request _01; | |
1311 | struct fw_cdev_allocate _02; | |
1312 | struct fw_cdev_deallocate _03; | |
1313 | struct fw_cdev_send_response _04; | |
1314 | struct fw_cdev_initiate_bus_reset _05; | |
1315 | struct fw_cdev_add_descriptor _06; | |
1316 | struct fw_cdev_remove_descriptor _07; | |
1317 | struct fw_cdev_create_iso_context _08; | |
1318 | struct fw_cdev_queue_iso _09; | |
1319 | struct fw_cdev_start_iso _0a; | |
1320 | struct fw_cdev_stop_iso _0b; | |
1321 | struct fw_cdev_get_cycle_timer _0c; | |
1322 | struct fw_cdev_allocate_iso_resource _0d; | |
1323 | struct fw_cdev_send_stream_packet _13; | |
1324 | })]; | |
2dbd7d7e | 1325 | int ret; |
4f259223 KH |
1326 | |
1327 | if (_IOC_TYPE(cmd) != '#' || | |
1328 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers)) | |
19a15b93 | 1329 | return -EINVAL; |
4f259223 KH |
1330 | |
1331 | if (_IOC_DIR(cmd) & _IOC_WRITE) { | |
2d826cc5 | 1332 | if (_IOC_SIZE(cmd) > sizeof(buffer) || |
4f259223 KH |
1333 | copy_from_user(buffer, arg, _IOC_SIZE(cmd))) |
1334 | return -EFAULT; | |
1335 | } | |
1336 | ||
2dbd7d7e SR |
1337 | ret = ioctl_handlers[_IOC_NR(cmd)](client, buffer); |
1338 | if (ret < 0) | |
1339 | return ret; | |
4f259223 KH |
1340 | |
1341 | if (_IOC_DIR(cmd) & _IOC_READ) { | |
2d826cc5 | 1342 | if (_IOC_SIZE(cmd) > sizeof(buffer) || |
4f259223 KH |
1343 | copy_to_user(arg, buffer, _IOC_SIZE(cmd))) |
1344 | return -EFAULT; | |
19a15b93 | 1345 | } |
4f259223 | 1346 | |
2dbd7d7e | 1347 | return ret; |
19a15b93 KH |
1348 | } |
1349 | ||
53dca511 SR |
1350 | static long fw_device_op_ioctl(struct file *file, |
1351 | unsigned int cmd, unsigned long arg) | |
19a15b93 KH |
1352 | { |
1353 | struct client *client = file->private_data; | |
1354 | ||
551f4cb9 JF |
1355 | if (fw_device_is_shutdown(client->device)) |
1356 | return -ENODEV; | |
1357 | ||
19a15b93 KH |
1358 | return dispatch_ioctl(client, cmd, (void __user *) arg); |
1359 | } | |
1360 | ||
1361 | #ifdef CONFIG_COMPAT | |
53dca511 SR |
1362 | static long fw_device_op_compat_ioctl(struct file *file, |
1363 | unsigned int cmd, unsigned long arg) | |
19a15b93 KH |
1364 | { |
1365 | struct client *client = file->private_data; | |
1366 | ||
551f4cb9 JF |
1367 | if (fw_device_is_shutdown(client->device)) |
1368 | return -ENODEV; | |
1369 | ||
19a15b93 KH |
1370 | return dispatch_ioctl(client, cmd, compat_ptr(arg)); |
1371 | } | |
1372 | #endif | |
1373 | ||
1374 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
1375 | { | |
1376 | struct client *client = file->private_data; | |
9aad8125 KH |
1377 | enum dma_data_direction direction; |
1378 | unsigned long size; | |
2dbd7d7e | 1379 | int page_count, ret; |
9aad8125 | 1380 | |
551f4cb9 JF |
1381 | if (fw_device_is_shutdown(client->device)) |
1382 | return -ENODEV; | |
1383 | ||
9aad8125 KH |
1384 | /* FIXME: We could support multiple buffers, but we don't. */ |
1385 | if (client->buffer.pages != NULL) | |
1386 | return -EBUSY; | |
1387 | ||
1388 | if (!(vma->vm_flags & VM_SHARED)) | |
1389 | return -EINVAL; | |
19a15b93 | 1390 | |
9aad8125 | 1391 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
1392 | return -EINVAL; |
1393 | ||
1394 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
1395 | size = vma->vm_end - vma->vm_start; |
1396 | page_count = size >> PAGE_SHIFT; | |
1397 | if (size & ~PAGE_MASK) | |
1398 | return -EINVAL; | |
1399 | ||
1400 | if (vma->vm_flags & VM_WRITE) | |
1401 | direction = DMA_TO_DEVICE; | |
1402 | else | |
1403 | direction = DMA_FROM_DEVICE; | |
1404 | ||
2dbd7d7e SR |
1405 | ret = fw_iso_buffer_init(&client->buffer, client->device->card, |
1406 | page_count, direction); | |
1407 | if (ret < 0) | |
1408 | return ret; | |
19a15b93 | 1409 | |
2dbd7d7e SR |
1410 | ret = fw_iso_buffer_map(&client->buffer, vma); |
1411 | if (ret < 0) | |
9aad8125 KH |
1412 | fw_iso_buffer_destroy(&client->buffer, client->device->card); |
1413 | ||
2dbd7d7e | 1414 | return ret; |
19a15b93 KH |
1415 | } |
1416 | ||
45ee3199 JF |
1417 | static int shutdown_resource(int id, void *p, void *data) |
1418 | { | |
e21fcf79 | 1419 | struct client_resource *resource = p; |
45ee3199 JF |
1420 | struct client *client = data; |
1421 | ||
e21fcf79 | 1422 | resource->release(client, resource); |
fb443036 | 1423 | client_put(client); |
45ee3199 JF |
1424 | |
1425 | return 0; | |
1426 | } | |
1427 | ||
19a15b93 KH |
1428 | static int fw_device_op_release(struct inode *inode, struct file *file) |
1429 | { | |
1430 | struct client *client = file->private_data; | |
e21fcf79 | 1431 | struct event *event, *next_event; |
19a15b93 | 1432 | |
97811e34 SR |
1433 | mutex_lock(&client->device->client_list_mutex); |
1434 | list_del(&client->link); | |
1435 | mutex_unlock(&client->device->client_list_mutex); | |
1436 | ||
19a15b93 KH |
1437 | if (client->iso_context) |
1438 | fw_iso_context_destroy(client->iso_context); | |
1439 | ||
36a755cf SR |
1440 | if (client->buffer.pages) |
1441 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
1442 | ||
45ee3199 | 1443 | /* Freeze client->resource_idr and client->event_list */ |
3ba94986 | 1444 | spin_lock_irq(&client->lock); |
45ee3199 | 1445 | client->in_shutdown = true; |
3ba94986 | 1446 | spin_unlock_irq(&client->lock); |
66dea3e5 | 1447 | |
45ee3199 JF |
1448 | idr_for_each(&client->resource_idr, shutdown_resource, client); |
1449 | idr_remove_all(&client->resource_idr); | |
1450 | idr_destroy(&client->resource_idr); | |
28cf6a04 | 1451 | |
e21fcf79 SR |
1452 | list_for_each_entry_safe(event, next_event, &client->event_list, link) |
1453 | kfree(event); | |
19a15b93 | 1454 | |
fb443036 | 1455 | client_put(client); |
19a15b93 KH |
1456 | |
1457 | return 0; | |
1458 | } | |
1459 | ||
1460 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
1461 | { | |
1462 | struct client *client = file->private_data; | |
2603bf21 | 1463 | unsigned int mask = 0; |
19a15b93 KH |
1464 | |
1465 | poll_wait(file, &client->wait, pt); | |
1466 | ||
2603bf21 KH |
1467 | if (fw_device_is_shutdown(client->device)) |
1468 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 1469 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
1470 | mask |= POLLIN | POLLRDNORM; |
1471 | ||
1472 | return mask; | |
19a15b93 KH |
1473 | } |
1474 | ||
21ebcd12 | 1475 | const struct file_operations fw_device_ops = { |
19a15b93 KH |
1476 | .owner = THIS_MODULE, |
1477 | .open = fw_device_op_open, | |
1478 | .read = fw_device_op_read, | |
1479 | .unlocked_ioctl = fw_device_op_ioctl, | |
1480 | .poll = fw_device_op_poll, | |
1481 | .release = fw_device_op_release, | |
1482 | .mmap = fw_device_op_mmap, | |
1483 | ||
1484 | #ifdef CONFIG_COMPAT | |
5af4e5ea | 1485 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
1486 | #endif |
1487 | }; |