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