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