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