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> | |
25 | #include <linux/firewire-cdev.h> | |
26 | #include <linux/idr.h> | |
b1bda4cd | 27 | #include <linux/jiffies.h> |
19a15b93 | 28 | #include <linux/kernel.h> |
fb443036 | 29 | #include <linux/kref.h> |
be5bbd67 SR |
30 | #include <linux/mm.h> |
31 | #include <linux/module.h> | |
d67cfb96 | 32 | #include <linux/mutex.h> |
19a15b93 | 33 | #include <linux/poll.h> |
a64408b9 | 34 | #include <linux/preempt.h> |
cf417e54 | 35 | #include <linux/spinlock.h> |
be5bbd67 SR |
36 | #include <linux/time.h> |
37 | #include <linux/vmalloc.h> | |
38 | #include <linux/wait.h> | |
b1bda4cd | 39 | #include <linux/workqueue.h> |
be5bbd67 | 40 | |
a64408b9 | 41 | #include <asm/system.h> |
19a15b93 | 42 | #include <asm/uaccess.h> |
be5bbd67 | 43 | |
19a15b93 | 44 | #include "fw-device.h" |
be5bbd67 SR |
45 | #include "fw-topology.h" |
46 | #include "fw-transaction.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; | |
129 | struct iso_resource_event *e_alloc, *e_dealloc; | |
130 | }; | |
131 | ||
1ec3c026 | 132 | static int schedule_iso_resource(struct iso_resource *); |
b1bda4cd JFSR |
133 | static void release_iso_resource(struct client *, struct client_resource *); |
134 | ||
97c18b7f SR |
135 | /* |
136 | * dequeue_event() just kfree()'s the event, so the event has to be | |
137 | * the first field in a struct XYZ_event. | |
138 | */ | |
139 | struct event { | |
140 | struct { void *data; size_t size; } v[2]; | |
141 | struct list_head link; | |
142 | }; | |
143 | ||
144 | struct bus_reset_event { | |
145 | struct event event; | |
146 | struct fw_cdev_event_bus_reset reset; | |
147 | }; | |
148 | ||
149 | struct outbound_transaction_event { | |
150 | struct event event; | |
151 | struct client *client; | |
152 | struct outbound_transaction_resource r; | |
153 | struct fw_cdev_event_response response; | |
154 | }; | |
155 | ||
156 | struct inbound_transaction_event { | |
157 | struct event event; | |
158 | struct fw_cdev_event_request request; | |
159 | }; | |
160 | ||
161 | struct iso_interrupt_event { | |
162 | struct event event; | |
163 | struct fw_cdev_event_iso_interrupt interrupt; | |
164 | }; | |
165 | ||
b1bda4cd JFSR |
166 | struct iso_resource_event { |
167 | struct event event; | |
168 | struct fw_cdev_event_iso_resource resource; | |
169 | }; | |
170 | ||
53dca511 | 171 | static inline void __user *u64_to_uptr(__u64 value) |
19a15b93 KH |
172 | { |
173 | return (void __user *)(unsigned long)value; | |
174 | } | |
175 | ||
53dca511 | 176 | static inline __u64 uptr_to_u64(void __user *ptr) |
19a15b93 KH |
177 | { |
178 | return (__u64)(unsigned long)ptr; | |
179 | } | |
180 | ||
181 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
182 | { | |
183 | struct fw_device *device; | |
184 | struct client *client; | |
185 | ||
96b19062 | 186 | device = fw_device_get_by_devt(inode->i_rdev); |
a3aca3da KH |
187 | if (device == NULL) |
188 | return -ENODEV; | |
19a15b93 | 189 | |
551f4cb9 JF |
190 | if (fw_device_is_shutdown(device)) { |
191 | fw_device_put(device); | |
192 | return -ENODEV; | |
193 | } | |
194 | ||
2d826cc5 | 195 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
96b19062 SR |
196 | if (client == NULL) { |
197 | fw_device_put(device); | |
19a15b93 | 198 | return -ENOMEM; |
96b19062 | 199 | } |
19a15b93 | 200 | |
96b19062 | 201 | client->device = device; |
19a15b93 | 202 | spin_lock_init(&client->lock); |
45ee3199 JF |
203 | idr_init(&client->resource_idr); |
204 | INIT_LIST_HEAD(&client->event_list); | |
19a15b93 | 205 | init_waitqueue_head(&client->wait); |
fb443036 | 206 | kref_init(&client->kref); |
19a15b93 KH |
207 | |
208 | file->private_data = client; | |
209 | ||
d67cfb96 | 210 | mutex_lock(&device->client_list_mutex); |
97bd9efa | 211 | list_add_tail(&client->link, &device->client_list); |
d67cfb96 | 212 | mutex_unlock(&device->client_list_mutex); |
97bd9efa | 213 | |
19a15b93 KH |
214 | return 0; |
215 | } | |
216 | ||
217 | static void queue_event(struct client *client, struct event *event, | |
218 | void *data0, size_t size0, void *data1, size_t size1) | |
219 | { | |
220 | unsigned long flags; | |
221 | ||
222 | event->v[0].data = data0; | |
223 | event->v[0].size = size0; | |
224 | event->v[1].data = data1; | |
225 | event->v[1].size = size1; | |
226 | ||
227 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
228 | if (client->in_shutdown) |
229 | kfree(event); | |
230 | else | |
231 | list_add_tail(&event->link, &client->event_list); | |
19a15b93 | 232 | spin_unlock_irqrestore(&client->lock, flags); |
83431cba JF |
233 | |
234 | wake_up_interruptible(&client->wait); | |
19a15b93 KH |
235 | } |
236 | ||
53dca511 SR |
237 | static int dequeue_event(struct client *client, |
238 | char __user *buffer, size_t count) | |
19a15b93 KH |
239 | { |
240 | unsigned long flags; | |
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 | |
2603bf21 | 255 | spin_lock_irqsave(&client->lock, flags); |
a459b8ab | 256 | event = list_first_entry(&client->event_list, struct event, link); |
19a15b93 | 257 | list_del(&event->link); |
19a15b93 KH |
258 | spin_unlock_irqrestore(&client->lock, flags); |
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 JF |
289 | unsigned long flags; |
290 | ||
291 | spin_lock_irqsave(&card->lock, flags); | |
344bbc4d | 292 | |
da8ecffa | 293 | event->closure = client->bus_reset_closure; |
344bbc4d | 294 | event->type = FW_CDEV_EVENT_BUS_RESET; |
cf5a56ac | 295 | event->generation = client->device->generation; |
da8ecffa | 296 | event->node_id = client->device->node_id; |
344bbc4d KH |
297 | event->local_node_id = card->local_node->node_id; |
298 | event->bm_node_id = 0; /* FIXME: We don't track the BM. */ | |
299 | event->irm_node_id = card->irm_node->node_id; | |
300 | event->root_node_id = card->root_node->node_id; | |
cf417e54 JF |
301 | |
302 | spin_unlock_irqrestore(&card->lock, flags); | |
344bbc4d KH |
303 | } |
304 | ||
53dca511 SR |
305 | static void for_each_client(struct fw_device *device, |
306 | void (*callback)(struct client *client)) | |
2603bf21 | 307 | { |
2603bf21 | 308 | struct client *c; |
2603bf21 | 309 | |
d67cfb96 | 310 | mutex_lock(&device->client_list_mutex); |
2603bf21 KH |
311 | list_for_each_entry(c, &device->client_list, link) |
312 | callback(c); | |
d67cfb96 | 313 | mutex_unlock(&device->client_list_mutex); |
2603bf21 KH |
314 | } |
315 | ||
b1bda4cd JFSR |
316 | static int schedule_reallocations(int id, void *p, void *data) |
317 | { | |
318 | struct client_resource *r = p; | |
319 | ||
320 | if (r->release == release_iso_resource) | |
321 | schedule_iso_resource(container_of(r, | |
322 | struct iso_resource, resource)); | |
323 | return 0; | |
324 | } | |
325 | ||
53dca511 | 326 | static void queue_bus_reset_event(struct client *client) |
97bd9efa | 327 | { |
97c18b7f | 328 | struct bus_reset_event *e; |
97bd9efa | 329 | |
97c18b7f SR |
330 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
331 | if (e == NULL) { | |
97bd9efa KH |
332 | fw_notify("Out of memory when allocating bus reset event\n"); |
333 | return; | |
334 | } | |
335 | ||
97c18b7f | 336 | fill_bus_reset_event(&e->reset, client); |
97bd9efa | 337 | |
97c18b7f SR |
338 | queue_event(client, &e->event, |
339 | &e->reset, sizeof(e->reset), NULL, 0); | |
b1bda4cd JFSR |
340 | |
341 | spin_lock_irq(&client->lock); | |
342 | idr_for_each(&client->resource_idr, schedule_reallocations, client); | |
343 | spin_unlock_irq(&client->lock); | |
97bd9efa KH |
344 | } |
345 | ||
346 | void fw_device_cdev_update(struct fw_device *device) | |
347 | { | |
2603bf21 KH |
348 | for_each_client(device, queue_bus_reset_event); |
349 | } | |
97bd9efa | 350 | |
2603bf21 KH |
351 | static void wake_up_client(struct client *client) |
352 | { | |
353 | wake_up_interruptible(&client->wait); | |
354 | } | |
97bd9efa | 355 | |
2603bf21 KH |
356 | void fw_device_cdev_remove(struct fw_device *device) |
357 | { | |
358 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
359 | } |
360 | ||
4f259223 | 361 | static int ioctl_get_info(struct client *client, void *buffer) |
19a15b93 | 362 | { |
4f259223 | 363 | struct fw_cdev_get_info *get_info = buffer; |
344bbc4d | 364 | struct fw_cdev_event_bus_reset bus_reset; |
c9755e14 | 365 | unsigned long ret = 0; |
344bbc4d | 366 | |
4f259223 KH |
367 | client->version = get_info->version; |
368 | get_info->version = FW_CDEV_VERSION; | |
cf417e54 | 369 | get_info->card = client->device->card->index; |
344bbc4d | 370 | |
c9755e14 SR |
371 | down_read(&fw_device_rwsem); |
372 | ||
4f259223 KH |
373 | if (get_info->rom != 0) { |
374 | void __user *uptr = u64_to_uptr(get_info->rom); | |
375 | size_t want = get_info->rom_length; | |
d84702a5 | 376 | size_t have = client->device->config_rom_length * 4; |
344bbc4d | 377 | |
c9755e14 SR |
378 | ret = copy_to_user(uptr, client->device->config_rom, |
379 | min(want, have)); | |
344bbc4d | 380 | } |
4f259223 | 381 | get_info->rom_length = client->device->config_rom_length * 4; |
344bbc4d | 382 | |
c9755e14 SR |
383 | up_read(&fw_device_rwsem); |
384 | ||
385 | if (ret != 0) | |
386 | return -EFAULT; | |
387 | ||
4f259223 KH |
388 | client->bus_reset_closure = get_info->bus_reset_closure; |
389 | if (get_info->bus_reset != 0) { | |
390 | void __user *uptr = u64_to_uptr(get_info->bus_reset); | |
344bbc4d | 391 | |
da8ecffa | 392 | fill_bus_reset_event(&bus_reset, client); |
2d826cc5 | 393 | if (copy_to_user(uptr, &bus_reset, sizeof(bus_reset))) |
344bbc4d KH |
394 | return -EFAULT; |
395 | } | |
19a15b93 | 396 | |
19a15b93 KH |
397 | return 0; |
398 | } | |
399 | ||
53dca511 SR |
400 | static int add_client_resource(struct client *client, |
401 | struct client_resource *resource, gfp_t gfp_mask) | |
3964a449 KH |
402 | { |
403 | unsigned long flags; | |
45ee3199 JF |
404 | int ret; |
405 | ||
406 | retry: | |
407 | if (idr_pre_get(&client->resource_idr, gfp_mask) == 0) | |
408 | return -ENOMEM; | |
3964a449 KH |
409 | |
410 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
411 | if (client->in_shutdown) |
412 | ret = -ECANCELED; | |
413 | else | |
414 | ret = idr_get_new(&client->resource_idr, resource, | |
415 | &resource->handle); | |
b1bda4cd | 416 | if (ret >= 0) { |
fb443036 | 417 | client_get(client); |
b1bda4cd JFSR |
418 | if (resource->release == release_iso_resource) |
419 | schedule_iso_resource(container_of(resource, | |
420 | struct iso_resource, resource)); | |
421 | } | |
3964a449 | 422 | spin_unlock_irqrestore(&client->lock, flags); |
45ee3199 JF |
423 | |
424 | if (ret == -EAGAIN) | |
425 | goto retry; | |
426 | ||
427 | return ret < 0 ? ret : 0; | |
3964a449 KH |
428 | } |
429 | ||
53dca511 SR |
430 | static int release_client_resource(struct client *client, u32 handle, |
431 | client_resource_release_fn_t release, | |
432 | struct client_resource **resource) | |
3964a449 KH |
433 | { |
434 | struct client_resource *r; | |
435 | unsigned long flags; | |
436 | ||
437 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
438 | if (client->in_shutdown) |
439 | r = NULL; | |
440 | else | |
441 | r = idr_find(&client->resource_idr, handle); | |
442 | if (r && r->release == release) | |
443 | idr_remove(&client->resource_idr, handle); | |
3964a449 KH |
444 | spin_unlock_irqrestore(&client->lock, flags); |
445 | ||
45ee3199 | 446 | if (!(r && r->release == release)) |
3964a449 KH |
447 | return -EINVAL; |
448 | ||
449 | if (resource) | |
450 | *resource = r; | |
451 | else | |
452 | r->release(client, r); | |
453 | ||
fb443036 SR |
454 | client_put(client); |
455 | ||
3964a449 KH |
456 | return 0; |
457 | } | |
458 | ||
53dca511 SR |
459 | static void release_transaction(struct client *client, |
460 | struct client_resource *resource) | |
3964a449 | 461 | { |
97c18b7f SR |
462 | struct outbound_transaction_resource *r = container_of(resource, |
463 | struct outbound_transaction_resource, resource); | |
3964a449 | 464 | |
97c18b7f | 465 | fw_cancel_transaction(client->device->card, &r->transaction); |
3964a449 KH |
466 | } |
467 | ||
53dca511 SR |
468 | static void complete_transaction(struct fw_card *card, int rcode, |
469 | void *payload, size_t length, void *data) | |
19a15b93 | 470 | { |
97c18b7f SR |
471 | struct outbound_transaction_event *e = data; |
472 | struct fw_cdev_event_response *rsp = &e->response; | |
473 | struct client *client = e->client; | |
28cf6a04 | 474 | unsigned long flags; |
19a15b93 | 475 | |
97c18b7f SR |
476 | if (length < rsp->length) |
477 | rsp->length = length; | |
19a15b93 | 478 | if (rcode == RCODE_COMPLETE) |
97c18b7f | 479 | memcpy(rsp->data, payload, rsp->length); |
19a15b93 | 480 | |
28cf6a04 | 481 | spin_lock_irqsave(&client->lock, flags); |
45ee3199 | 482 | /* |
fb443036 SR |
483 | * 1. If called while in shutdown, the idr tree must be left untouched. |
484 | * The idr handle will be removed and the client reference will be | |
485 | * dropped later. | |
486 | * 2. If the call chain was release_client_resource -> | |
487 | * release_transaction -> complete_transaction (instead of a normal | |
488 | * conclusion of the transaction), i.e. if this resource was already | |
489 | * unregistered from the idr, the client reference will be dropped | |
490 | * by release_client_resource and we must not drop it here. | |
45ee3199 | 491 | */ |
fb443036 | 492 | if (!client->in_shutdown && |
97c18b7f SR |
493 | idr_find(&client->resource_idr, e->r.resource.handle)) { |
494 | idr_remove(&client->resource_idr, e->r.resource.handle); | |
fb443036 SR |
495 | /* Drop the idr's reference */ |
496 | client_put(client); | |
497 | } | |
28cf6a04 KH |
498 | spin_unlock_irqrestore(&client->lock, flags); |
499 | ||
97c18b7f SR |
500 | rsp->type = FW_CDEV_EVENT_RESPONSE; |
501 | rsp->rcode = rcode; | |
8401d92b DM |
502 | |
503 | /* | |
97c18b7f | 504 | * In the case that sizeof(*rsp) doesn't align with the position of the |
8401d92b DM |
505 | * data, and the read is short, preserve an extra copy of the data |
506 | * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless | |
507 | * for short reads and some apps depended on it, this is both safe | |
508 | * and prudent for compatibility. | |
509 | */ | |
97c18b7f SR |
510 | if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data)) |
511 | queue_event(client, &e->event, rsp, sizeof(*rsp), | |
512 | rsp->data, rsp->length); | |
8401d92b | 513 | else |
97c18b7f | 514 | queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length, |
8401d92b | 515 | NULL, 0); |
fb443036 SR |
516 | |
517 | /* Drop the transaction callback's reference */ | |
518 | client_put(client); | |
19a15b93 KH |
519 | } |
520 | ||
acfe8333 JFSR |
521 | static int init_request(struct client *client, |
522 | struct fw_cdev_send_request *request, | |
523 | int destination_id, int speed) | |
19a15b93 | 524 | { |
97c18b7f | 525 | struct outbound_transaction_event *e; |
1f3125af | 526 | int ret; |
19a15b93 | 527 | |
19a15b93 | 528 | /* What is the biggest size we'll accept, really? */ |
4f259223 | 529 | if (request->length > 4096) |
19a15b93 KH |
530 | return -EINVAL; |
531 | ||
97c18b7f SR |
532 | e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL); |
533 | if (e == NULL) | |
19a15b93 KH |
534 | return -ENOMEM; |
535 | ||
97c18b7f SR |
536 | e->client = client; |
537 | e->response.length = request->length; | |
538 | e->response.closure = request->closure; | |
19a15b93 | 539 | |
4f259223 | 540 | if (request->data && |
97c18b7f | 541 | copy_from_user(e->response.data, |
4f259223 | 542 | u64_to_uptr(request->data), request->length)) { |
1f3125af | 543 | ret = -EFAULT; |
45ee3199 | 544 | goto failed; |
1f3125af SR |
545 | } |
546 | ||
97c18b7f SR |
547 | e->r.resource.release = release_transaction; |
548 | ret = add_client_resource(client, &e->r.resource, GFP_KERNEL); | |
45ee3199 JF |
549 | if (ret < 0) |
550 | goto failed; | |
28cf6a04 | 551 | |
fb443036 SR |
552 | /* Get a reference for the transaction callback */ |
553 | client_get(client); | |
554 | ||
acfe8333 JFSR |
555 | fw_send_request(client->device->card, &e->r.transaction, |
556 | request->tcode & 0x1f, destination_id, | |
557 | request->generation, speed, request->offset, | |
97c18b7f SR |
558 | e->response.data, request->length, |
559 | complete_transaction, e); | |
19a15b93 | 560 | |
4f259223 | 561 | if (request->data) |
2d826cc5 | 562 | return sizeof(request) + request->length; |
19a15b93 | 563 | else |
2d826cc5 | 564 | return sizeof(request); |
45ee3199 | 565 | failed: |
97c18b7f | 566 | kfree(e); |
1f3125af SR |
567 | |
568 | return ret; | |
19a15b93 KH |
569 | } |
570 | ||
acfe8333 JFSR |
571 | static int ioctl_send_request(struct client *client, void *buffer) |
572 | { | |
573 | struct fw_cdev_send_request *request = buffer; | |
574 | ||
575 | switch (request->tcode) { | |
576 | case TCODE_WRITE_QUADLET_REQUEST: | |
577 | case TCODE_WRITE_BLOCK_REQUEST: | |
578 | case TCODE_READ_QUADLET_REQUEST: | |
579 | case TCODE_READ_BLOCK_REQUEST: | |
580 | case TCODE_LOCK_MASK_SWAP: | |
581 | case TCODE_LOCK_COMPARE_SWAP: | |
582 | case TCODE_LOCK_FETCH_ADD: | |
583 | case TCODE_LOCK_LITTLE_ADD: | |
584 | case TCODE_LOCK_BOUNDED_ADD: | |
585 | case TCODE_LOCK_WRAP_ADD: | |
586 | case TCODE_LOCK_VENDOR_DEPENDENT: | |
587 | break; | |
588 | default: | |
589 | return -EINVAL; | |
590 | } | |
591 | ||
592 | return init_request(client, request, client->device->node->node_id, | |
593 | client->device->max_speed); | |
594 | } | |
595 | ||
53dca511 SR |
596 | static void release_request(struct client *client, |
597 | struct client_resource *resource) | |
3964a449 | 598 | { |
97c18b7f SR |
599 | struct inbound_transaction_resource *r = container_of(resource, |
600 | struct inbound_transaction_resource, resource); | |
3964a449 | 601 | |
97c18b7f | 602 | fw_send_response(client->device->card, r->request, |
3964a449 | 603 | RCODE_CONFLICT_ERROR); |
97c18b7f | 604 | kfree(r); |
3964a449 KH |
605 | } |
606 | ||
97c18b7f | 607 | static void handle_request(struct fw_card *card, struct fw_request *request, |
53dca511 SR |
608 | int tcode, int destination, int source, |
609 | int generation, int speed, | |
610 | unsigned long long offset, | |
611 | void *payload, size_t length, void *callback_data) | |
19a15b93 | 612 | { |
97c18b7f SR |
613 | struct address_handler_resource *handler = callback_data; |
614 | struct inbound_transaction_resource *r; | |
615 | struct inbound_transaction_event *e; | |
45ee3199 | 616 | int ret; |
19a15b93 | 617 | |
97c18b7f | 618 | r = kmalloc(sizeof(*r), GFP_ATOMIC); |
2d826cc5 | 619 | e = kmalloc(sizeof(*e), GFP_ATOMIC); |
97c18b7f | 620 | if (r == NULL || e == NULL) |
45ee3199 | 621 | goto failed; |
19a15b93 | 622 | |
97c18b7f SR |
623 | r->request = request; |
624 | r->data = payload; | |
625 | r->length = length; | |
19a15b93 | 626 | |
97c18b7f SR |
627 | r->resource.release = release_request; |
628 | ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC); | |
45ee3199 JF |
629 | if (ret < 0) |
630 | goto failed; | |
19a15b93 KH |
631 | |
632 | e->request.type = FW_CDEV_EVENT_REQUEST; | |
633 | e->request.tcode = tcode; | |
634 | e->request.offset = offset; | |
635 | e->request.length = length; | |
97c18b7f | 636 | e->request.handle = r->resource.handle; |
19a15b93 KH |
637 | e->request.closure = handler->closure; |
638 | ||
97c18b7f | 639 | queue_event(handler->client, &e->event, |
2d826cc5 | 640 | &e->request, sizeof(e->request), payload, length); |
45ee3199 JF |
641 | return; |
642 | ||
643 | failed: | |
97c18b7f | 644 | kfree(r); |
45ee3199 | 645 | kfree(e); |
97c18b7f | 646 | fw_send_response(card, request, RCODE_CONFLICT_ERROR); |
19a15b93 KH |
647 | } |
648 | ||
53dca511 SR |
649 | static void release_address_handler(struct client *client, |
650 | struct client_resource *resource) | |
3964a449 | 651 | { |
97c18b7f SR |
652 | struct address_handler_resource *r = |
653 | container_of(resource, struct address_handler_resource, resource); | |
3964a449 | 654 | |
97c18b7f SR |
655 | fw_core_remove_address_handler(&r->handler); |
656 | kfree(r); | |
3964a449 KH |
657 | } |
658 | ||
4f259223 | 659 | static int ioctl_allocate(struct client *client, void *buffer) |
19a15b93 | 660 | { |
4f259223 | 661 | struct fw_cdev_allocate *request = buffer; |
97c18b7f | 662 | struct address_handler_resource *r; |
19a15b93 | 663 | struct fw_address_region region; |
45ee3199 | 664 | int ret; |
19a15b93 | 665 | |
97c18b7f SR |
666 | r = kmalloc(sizeof(*r), GFP_KERNEL); |
667 | if (r == NULL) | |
19a15b93 KH |
668 | return -ENOMEM; |
669 | ||
4f259223 KH |
670 | region.start = request->offset; |
671 | region.end = request->offset + request->length; | |
97c18b7f SR |
672 | r->handler.length = request->length; |
673 | r->handler.address_callback = handle_request; | |
674 | r->handler.callback_data = r; | |
675 | r->closure = request->closure; | |
676 | r->client = client; | |
19a15b93 | 677 | |
97c18b7f | 678 | ret = fw_core_add_address_handler(&r->handler, ®ion); |
3e0b5f0d | 679 | if (ret < 0) { |
97c18b7f | 680 | kfree(r); |
3e0b5f0d | 681 | return ret; |
19a15b93 KH |
682 | } |
683 | ||
97c18b7f SR |
684 | r->resource.release = release_address_handler; |
685 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 686 | if (ret < 0) { |
97c18b7f | 687 | release_address_handler(client, &r->resource); |
45ee3199 JF |
688 | return ret; |
689 | } | |
97c18b7f | 690 | request->handle = r->resource.handle; |
19a15b93 KH |
691 | |
692 | return 0; | |
693 | } | |
694 | ||
4f259223 | 695 | static int ioctl_deallocate(struct client *client, void *buffer) |
9472316b | 696 | { |
4f259223 | 697 | struct fw_cdev_deallocate *request = buffer; |
9472316b | 698 | |
45ee3199 JF |
699 | return release_client_resource(client, request->handle, |
700 | release_address_handler, NULL); | |
9472316b KH |
701 | } |
702 | ||
4f259223 | 703 | static int ioctl_send_response(struct client *client, void *buffer) |
19a15b93 | 704 | { |
4f259223 | 705 | struct fw_cdev_send_response *request = buffer; |
3964a449 | 706 | struct client_resource *resource; |
97c18b7f | 707 | struct inbound_transaction_resource *r; |
19a15b93 | 708 | |
45ee3199 JF |
709 | if (release_client_resource(client, request->handle, |
710 | release_request, &resource) < 0) | |
19a15b93 | 711 | return -EINVAL; |
45ee3199 | 712 | |
97c18b7f SR |
713 | r = container_of(resource, struct inbound_transaction_resource, |
714 | resource); | |
4f259223 KH |
715 | if (request->length < r->length) |
716 | r->length = request->length; | |
717 | if (copy_from_user(r->data, u64_to_uptr(request->data), r->length)) | |
19a15b93 KH |
718 | return -EFAULT; |
719 | ||
4f259223 | 720 | fw_send_response(client->device->card, r->request, request->rcode); |
19a15b93 KH |
721 | kfree(r); |
722 | ||
723 | return 0; | |
724 | } | |
725 | ||
4f259223 | 726 | static int ioctl_initiate_bus_reset(struct client *client, void *buffer) |
5371842b | 727 | { |
4f259223 | 728 | struct fw_cdev_initiate_bus_reset *request = buffer; |
5371842b KH |
729 | int short_reset; |
730 | ||
4f259223 | 731 | short_reset = (request->type == FW_CDEV_SHORT_RESET); |
5371842b KH |
732 | |
733 | return fw_core_initiate_bus_reset(client->device->card, short_reset); | |
734 | } | |
735 | ||
3964a449 KH |
736 | static void release_descriptor(struct client *client, |
737 | struct client_resource *resource) | |
738 | { | |
97c18b7f SR |
739 | struct descriptor_resource *r = |
740 | container_of(resource, struct descriptor_resource, resource); | |
3964a449 | 741 | |
97c18b7f SR |
742 | fw_core_remove_descriptor(&r->descriptor); |
743 | kfree(r); | |
3964a449 KH |
744 | } |
745 | ||
4f259223 | 746 | static int ioctl_add_descriptor(struct client *client, void *buffer) |
66dea3e5 | 747 | { |
4f259223 | 748 | struct fw_cdev_add_descriptor *request = buffer; |
97c18b7f | 749 | struct descriptor_resource *r; |
45ee3199 | 750 | int ret; |
66dea3e5 | 751 | |
4f259223 | 752 | if (request->length > 256) |
66dea3e5 KH |
753 | return -EINVAL; |
754 | ||
97c18b7f SR |
755 | r = kmalloc(sizeof(*r) + request->length * 4, GFP_KERNEL); |
756 | if (r == NULL) | |
66dea3e5 KH |
757 | return -ENOMEM; |
758 | ||
97c18b7f | 759 | if (copy_from_user(r->data, |
4f259223 | 760 | u64_to_uptr(request->data), request->length * 4)) { |
45ee3199 JF |
761 | ret = -EFAULT; |
762 | goto failed; | |
66dea3e5 KH |
763 | } |
764 | ||
97c18b7f SR |
765 | r->descriptor.length = request->length; |
766 | r->descriptor.immediate = request->immediate; | |
767 | r->descriptor.key = request->key; | |
768 | r->descriptor.data = r->data; | |
66dea3e5 | 769 | |
97c18b7f | 770 | ret = fw_core_add_descriptor(&r->descriptor); |
45ee3199 JF |
771 | if (ret < 0) |
772 | goto failed; | |
66dea3e5 | 773 | |
97c18b7f SR |
774 | r->resource.release = release_descriptor; |
775 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 776 | if (ret < 0) { |
97c18b7f | 777 | fw_core_remove_descriptor(&r->descriptor); |
45ee3199 JF |
778 | goto failed; |
779 | } | |
97c18b7f | 780 | request->handle = r->resource.handle; |
66dea3e5 KH |
781 | |
782 | return 0; | |
45ee3199 | 783 | failed: |
97c18b7f | 784 | kfree(r); |
45ee3199 JF |
785 | |
786 | return ret; | |
66dea3e5 KH |
787 | } |
788 | ||
4f259223 | 789 | static int ioctl_remove_descriptor(struct client *client, void *buffer) |
66dea3e5 | 790 | { |
4f259223 | 791 | struct fw_cdev_remove_descriptor *request = buffer; |
66dea3e5 | 792 | |
45ee3199 JF |
793 | return release_client_resource(client, request->handle, |
794 | release_descriptor, NULL); | |
66dea3e5 KH |
795 | } |
796 | ||
53dca511 SR |
797 | static void iso_callback(struct fw_iso_context *context, u32 cycle, |
798 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
799 | { |
800 | struct client *client = data; | |
97c18b7f | 801 | struct iso_interrupt_event *e; |
19a15b93 | 802 | |
97c18b7f SR |
803 | e = kzalloc(sizeof(*e) + header_length, GFP_ATOMIC); |
804 | if (e == NULL) | |
19a15b93 KH |
805 | return; |
806 | ||
97c18b7f SR |
807 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
808 | e->interrupt.closure = client->iso_closure; | |
809 | e->interrupt.cycle = cycle; | |
810 | e->interrupt.header_length = header_length; | |
811 | memcpy(e->interrupt.header, header, header_length); | |
812 | queue_event(client, &e->event, &e->interrupt, | |
813 | sizeof(e->interrupt) + header_length, NULL, 0); | |
19a15b93 KH |
814 | } |
815 | ||
4f259223 | 816 | static int ioctl_create_iso_context(struct client *client, void *buffer) |
19a15b93 | 817 | { |
4f259223 | 818 | struct fw_cdev_create_iso_context *request = buffer; |
24315c5e | 819 | struct fw_iso_context *context; |
19a15b93 | 820 | |
fae60312 SR |
821 | /* We only support one context at this time. */ |
822 | if (client->iso_context != NULL) | |
823 | return -EBUSY; | |
824 | ||
4f259223 | 825 | if (request->channel > 63) |
21efb3cf KH |
826 | return -EINVAL; |
827 | ||
4f259223 | 828 | switch (request->type) { |
c70dc788 | 829 | case FW_ISO_CONTEXT_RECEIVE: |
4f259223 | 830 | if (request->header_size < 4 || (request->header_size & 3)) |
c70dc788 | 831 | return -EINVAL; |
98b6cbe8 | 832 | |
c70dc788 KH |
833 | break; |
834 | ||
835 | case FW_ISO_CONTEXT_TRANSMIT: | |
4f259223 | 836 | if (request->speed > SCODE_3200) |
c70dc788 KH |
837 | return -EINVAL; |
838 | ||
839 | break; | |
840 | ||
841 | default: | |
21efb3cf | 842 | return -EINVAL; |
c70dc788 KH |
843 | } |
844 | ||
24315c5e KH |
845 | context = fw_iso_context_create(client->device->card, |
846 | request->type, | |
847 | request->channel, | |
848 | request->speed, | |
849 | request->header_size, | |
850 | iso_callback, client); | |
851 | if (IS_ERR(context)) | |
852 | return PTR_ERR(context); | |
853 | ||
abaa5743 | 854 | client->iso_closure = request->closure; |
24315c5e | 855 | client->iso_context = context; |
19a15b93 | 856 | |
abaa5743 KH |
857 | /* We only support one context at this time. */ |
858 | request->handle = 0; | |
859 | ||
19a15b93 KH |
860 | return 0; |
861 | } | |
862 | ||
1ca31ae7 KH |
863 | /* Macros for decoding the iso packet control header. */ |
864 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) | |
865 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) | |
866 | #define GET_SKIP(v) (((v) >> 17) & 0x01) | |
7a100344 SR |
867 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
868 | #define GET_SY(v) (((v) >> 20) & 0x0f) | |
1ca31ae7 KH |
869 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
870 | ||
4f259223 | 871 | static int ioctl_queue_iso(struct client *client, void *buffer) |
19a15b93 | 872 | { |
4f259223 | 873 | struct fw_cdev_queue_iso *request = buffer; |
19a15b93 | 874 | struct fw_cdev_iso_packet __user *p, *end, *next; |
9b32d5f3 | 875 | struct fw_iso_context *ctx = client->iso_context; |
ef370ee7 | 876 | unsigned long payload, buffer_end, header_length; |
1ca31ae7 | 877 | u32 control; |
19a15b93 KH |
878 | int count; |
879 | struct { | |
880 | struct fw_iso_packet packet; | |
881 | u8 header[256]; | |
882 | } u; | |
883 | ||
abaa5743 | 884 | if (ctx == NULL || request->handle != 0) |
19a15b93 | 885 | return -EINVAL; |
19a15b93 | 886 | |
c781c06d KH |
887 | /* |
888 | * If the user passes a non-NULL data pointer, has mmap()'ed | |
19a15b93 KH |
889 | * the iso buffer, and the pointer points inside the buffer, |
890 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 891 | * set them both to 0, which will still let packets with |
19a15b93 KH |
892 | * payload_length == 0 through. In other words, if no packets |
893 | * use the indirect payload, the iso buffer need not be mapped | |
c781c06d KH |
894 | * and the request->data pointer is ignored. |
895 | */ | |
19a15b93 | 896 | |
4f259223 | 897 | payload = (unsigned long)request->data - client->vm_start; |
ef370ee7 | 898 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
4f259223 | 899 | if (request->data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 900 | payload >= buffer_end) { |
9aad8125 | 901 | payload = 0; |
ef370ee7 | 902 | buffer_end = 0; |
19a15b93 KH |
903 | } |
904 | ||
1ccc9147 AV |
905 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(request->packets); |
906 | ||
907 | if (!access_ok(VERIFY_READ, p, request->size)) | |
19a15b93 KH |
908 | return -EFAULT; |
909 | ||
4f259223 | 910 | end = (void __user *)p + request->size; |
19a15b93 KH |
911 | count = 0; |
912 | while (p < end) { | |
1ca31ae7 | 913 | if (get_user(control, &p->control)) |
19a15b93 | 914 | return -EFAULT; |
1ca31ae7 KH |
915 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
916 | u.packet.interrupt = GET_INTERRUPT(control); | |
917 | u.packet.skip = GET_SKIP(control); | |
918 | u.packet.tag = GET_TAG(control); | |
919 | u.packet.sy = GET_SY(control); | |
920 | u.packet.header_length = GET_HEADER_LENGTH(control); | |
295e3feb | 921 | |
9b32d5f3 | 922 | if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) { |
295e3feb KH |
923 | header_length = u.packet.header_length; |
924 | } else { | |
c781c06d KH |
925 | /* |
926 | * We require that header_length is a multiple of | |
927 | * the fixed header size, ctx->header_size. | |
928 | */ | |
9b32d5f3 KH |
929 | if (ctx->header_size == 0) { |
930 | if (u.packet.header_length > 0) | |
931 | return -EINVAL; | |
932 | } else if (u.packet.header_length % ctx->header_size != 0) { | |
295e3feb | 933 | return -EINVAL; |
9b32d5f3 | 934 | } |
295e3feb KH |
935 | header_length = 0; |
936 | } | |
937 | ||
19a15b93 | 938 | next = (struct fw_cdev_iso_packet __user *) |
295e3feb | 939 | &p->header[header_length / 4]; |
19a15b93 KH |
940 | if (next > end) |
941 | return -EINVAL; | |
942 | if (__copy_from_user | |
295e3feb | 943 | (u.packet.header, p->header, header_length)) |
19a15b93 | 944 | return -EFAULT; |
98b6cbe8 | 945 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
946 | u.packet.header_length + u.packet.payload_length > 0) |
947 | return -EINVAL; | |
ef370ee7 | 948 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
949 | return -EINVAL; |
950 | ||
9b32d5f3 KH |
951 | if (fw_iso_context_queue(ctx, &u.packet, |
952 | &client->buffer, payload)) | |
19a15b93 KH |
953 | break; |
954 | ||
955 | p = next; | |
956 | payload += u.packet.payload_length; | |
957 | count++; | |
958 | } | |
959 | ||
4f259223 KH |
960 | request->size -= uptr_to_u64(p) - request->packets; |
961 | request->packets = uptr_to_u64(p); | |
962 | request->data = client->vm_start + payload; | |
19a15b93 KH |
963 | |
964 | return count; | |
965 | } | |
966 | ||
4f259223 | 967 | static int ioctl_start_iso(struct client *client, void *buffer) |
19a15b93 | 968 | { |
4f259223 | 969 | struct fw_cdev_start_iso *request = buffer; |
19a15b93 | 970 | |
fae60312 | 971 | if (client->iso_context == NULL || request->handle != 0) |
abaa5743 | 972 | return -EINVAL; |
fae60312 | 973 | |
eb0306ea | 974 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE) { |
4f259223 | 975 | if (request->tags == 0 || request->tags > 15) |
eb0306ea KH |
976 | return -EINVAL; |
977 | ||
4f259223 | 978 | if (request->sync > 15) |
eb0306ea KH |
979 | return -EINVAL; |
980 | } | |
981 | ||
4f259223 KH |
982 | return fw_iso_context_start(client->iso_context, request->cycle, |
983 | request->sync, request->tags); | |
19a15b93 KH |
984 | } |
985 | ||
4f259223 | 986 | static int ioctl_stop_iso(struct client *client, void *buffer) |
b8295668 | 987 | { |
abaa5743 KH |
988 | struct fw_cdev_stop_iso *request = buffer; |
989 | ||
fae60312 | 990 | if (client->iso_context == NULL || request->handle != 0) |
abaa5743 KH |
991 | return -EINVAL; |
992 | ||
b8295668 KH |
993 | return fw_iso_context_stop(client->iso_context); |
994 | } | |
995 | ||
a64408b9 SR |
996 | static int ioctl_get_cycle_timer(struct client *client, void *buffer) |
997 | { | |
998 | struct fw_cdev_get_cycle_timer *request = buffer; | |
999 | struct fw_card *card = client->device->card; | |
1000 | unsigned long long bus_time; | |
1001 | struct timeval tv; | |
1002 | unsigned long flags; | |
1003 | ||
1004 | preempt_disable(); | |
1005 | local_irq_save(flags); | |
1006 | ||
1007 | bus_time = card->driver->get_bus_time(card); | |
1008 | do_gettimeofday(&tv); | |
1009 | ||
1010 | local_irq_restore(flags); | |
1011 | preempt_enable(); | |
1012 | ||
1013 | request->local_time = tv.tv_sec * 1000000ULL + tv.tv_usec; | |
1014 | request->cycle_timer = bus_time & 0xffffffff; | |
1015 | return 0; | |
1016 | } | |
1017 | ||
b1bda4cd JFSR |
1018 | static void iso_resource_work(struct work_struct *work) |
1019 | { | |
1020 | struct iso_resource_event *e; | |
1021 | struct iso_resource *r = | |
1022 | container_of(work, struct iso_resource, work.work); | |
1023 | struct client *client = r->client; | |
1024 | int generation, channel, bandwidth, todo; | |
1025 | bool skip, free, success; | |
1026 | ||
1027 | spin_lock_irq(&client->lock); | |
1028 | generation = client->device->generation; | |
1029 | todo = r->todo; | |
1030 | /* Allow 1000ms grace period for other reallocations. */ | |
1031 | if (todo == ISO_RES_ALLOC && | |
1032 | time_is_after_jiffies(client->device->card->reset_jiffies + HZ)) { | |
1033 | if (schedule_delayed_work(&r->work, DIV_ROUND_UP(HZ, 3))) | |
1034 | client_get(client); | |
1035 | skip = true; | |
1036 | } else { | |
1037 | /* We could be called twice within the same generation. */ | |
1038 | skip = todo == ISO_RES_REALLOC && | |
1039 | r->generation == generation; | |
1040 | } | |
1ec3c026 SR |
1041 | free = todo == ISO_RES_DEALLOC || |
1042 | todo == ISO_RES_ALLOC_ONCE || | |
1043 | todo == ISO_RES_DEALLOC_ONCE; | |
b1bda4cd JFSR |
1044 | r->generation = generation; |
1045 | spin_unlock_irq(&client->lock); | |
1046 | ||
1047 | if (skip) | |
1048 | goto out; | |
1049 | ||
1050 | bandwidth = r->bandwidth; | |
1051 | ||
1052 | fw_iso_resource_manage(client->device->card, generation, | |
1053 | r->channels, &channel, &bandwidth, | |
1ec3c026 SR |
1054 | todo == ISO_RES_ALLOC || |
1055 | todo == ISO_RES_REALLOC || | |
1056 | todo == ISO_RES_ALLOC_ONCE); | |
b1bda4cd JFSR |
1057 | /* |
1058 | * Is this generation outdated already? As long as this resource sticks | |
1059 | * in the idr, it will be scheduled again for a newer generation or at | |
1060 | * shutdown. | |
1061 | */ | |
1062 | if (channel == -EAGAIN && | |
1063 | (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC)) | |
1064 | goto out; | |
1065 | ||
1066 | success = channel >= 0 || bandwidth > 0; | |
1067 | ||
1068 | spin_lock_irq(&client->lock); | |
1069 | /* | |
1070 | * Transit from allocation to reallocation, except if the client | |
1071 | * requested deallocation in the meantime. | |
1072 | */ | |
1073 | if (r->todo == ISO_RES_ALLOC) | |
1074 | r->todo = ISO_RES_REALLOC; | |
1075 | /* | |
1076 | * Allocation or reallocation failure? Pull this resource out of the | |
1077 | * idr and prepare for deletion, unless the client is shutting down. | |
1078 | */ | |
1079 | if (r->todo == ISO_RES_REALLOC && !success && | |
1080 | !client->in_shutdown && | |
1081 | idr_find(&client->resource_idr, r->resource.handle)) { | |
1082 | idr_remove(&client->resource_idr, r->resource.handle); | |
1083 | client_put(client); | |
1084 | free = true; | |
1085 | } | |
1086 | spin_unlock_irq(&client->lock); | |
1087 | ||
1088 | if (todo == ISO_RES_ALLOC && channel >= 0) | |
1089 | r->channels = 1ULL << (63 - channel); | |
1090 | ||
1091 | if (todo == ISO_RES_REALLOC && success) | |
1092 | goto out; | |
1093 | ||
1ec3c026 | 1094 | if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) { |
b1bda4cd JFSR |
1095 | e = r->e_alloc; |
1096 | r->e_alloc = NULL; | |
1097 | } else { | |
1098 | e = r->e_dealloc; | |
1099 | r->e_dealloc = NULL; | |
1100 | } | |
1101 | e->resource.handle = r->resource.handle; | |
1102 | e->resource.channel = channel; | |
1103 | e->resource.bandwidth = bandwidth; | |
1104 | ||
1105 | queue_event(client, &e->event, | |
1106 | &e->resource, sizeof(e->resource), NULL, 0); | |
1107 | ||
1108 | if (free) { | |
1109 | cancel_delayed_work(&r->work); | |
1110 | kfree(r->e_alloc); | |
1111 | kfree(r->e_dealloc); | |
1112 | kfree(r); | |
1113 | } | |
1114 | out: | |
1115 | client_put(client); | |
1116 | } | |
1117 | ||
1ec3c026 | 1118 | static int schedule_iso_resource(struct iso_resource *r) |
b1bda4cd | 1119 | { |
1ec3c026 SR |
1120 | int scheduled; |
1121 | ||
1122 | client_get(r->client); | |
1123 | ||
1124 | scheduled = schedule_delayed_work(&r->work, 0); | |
1125 | if (!scheduled) | |
1126 | client_put(r->client); | |
1127 | ||
1128 | return scheduled; | |
b1bda4cd JFSR |
1129 | } |
1130 | ||
1131 | static void release_iso_resource(struct client *client, | |
1132 | struct client_resource *resource) | |
1133 | { | |
1134 | struct iso_resource *r = | |
1135 | container_of(resource, struct iso_resource, resource); | |
1136 | ||
1137 | spin_lock_irq(&client->lock); | |
1138 | r->todo = ISO_RES_DEALLOC; | |
1139 | schedule_iso_resource(r); | |
1140 | spin_unlock_irq(&client->lock); | |
1141 | } | |
1142 | ||
1ec3c026 SR |
1143 | static int init_iso_resource(struct client *client, |
1144 | struct fw_cdev_allocate_iso_resource *request, int todo) | |
b1bda4cd | 1145 | { |
b1bda4cd JFSR |
1146 | struct iso_resource_event *e1, *e2; |
1147 | struct iso_resource *r; | |
1148 | int ret; | |
1149 | ||
1150 | if ((request->channels == 0 && request->bandwidth == 0) || | |
1151 | request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL || | |
1152 | request->bandwidth < 0) | |
1153 | return -EINVAL; | |
1154 | ||
1155 | r = kmalloc(sizeof(*r), GFP_KERNEL); | |
1156 | e1 = kmalloc(sizeof(*e1), GFP_KERNEL); | |
1157 | e2 = kmalloc(sizeof(*e2), GFP_KERNEL); | |
1158 | if (r == NULL || e1 == NULL || e2 == NULL) { | |
1159 | ret = -ENOMEM; | |
1160 | goto fail; | |
1161 | } | |
1162 | ||
1163 | INIT_DELAYED_WORK(&r->work, iso_resource_work); | |
1164 | r->client = client; | |
1ec3c026 | 1165 | r->todo = todo; |
b1bda4cd JFSR |
1166 | r->generation = -1; |
1167 | r->channels = request->channels; | |
1168 | r->bandwidth = request->bandwidth; | |
1169 | r->e_alloc = e1; | |
1170 | r->e_dealloc = e2; | |
1171 | ||
1172 | e1->resource.closure = request->closure; | |
1173 | e1->resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED; | |
1174 | e2->resource.closure = request->closure; | |
1175 | e2->resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED; | |
1176 | ||
1ec3c026 SR |
1177 | if (todo == ISO_RES_ALLOC) { |
1178 | r->resource.release = release_iso_resource; | |
1179 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
1180 | } else { | |
1181 | r->resource.release = NULL; | |
1182 | r->resource.handle = -1; | |
1183 | ret = schedule_iso_resource(r) ? 0 : -ENOMEM; | |
1184 | } | |
b1bda4cd JFSR |
1185 | if (ret < 0) |
1186 | goto fail; | |
1187 | request->handle = r->resource.handle; | |
1188 | ||
1189 | return 0; | |
1190 | fail: | |
1191 | kfree(r); | |
1192 | kfree(e1); | |
1193 | kfree(e2); | |
1194 | ||
1195 | return ret; | |
1196 | } | |
1197 | ||
1ec3c026 SR |
1198 | static int ioctl_allocate_iso_resource(struct client *client, void *buffer) |
1199 | { | |
1200 | struct fw_cdev_allocate_iso_resource *request = buffer; | |
1201 | ||
1202 | return init_iso_resource(client, request, ISO_RES_ALLOC); | |
1203 | } | |
1204 | ||
b1bda4cd JFSR |
1205 | static int ioctl_deallocate_iso_resource(struct client *client, void *buffer) |
1206 | { | |
1207 | struct fw_cdev_deallocate *request = buffer; | |
1208 | ||
1209 | return release_client_resource(client, request->handle, | |
1210 | release_iso_resource, NULL); | |
1211 | } | |
1212 | ||
1ec3c026 SR |
1213 | static int ioctl_allocate_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_ALLOC_ONCE); | |
1218 | } | |
1219 | ||
1220 | static int ioctl_deallocate_iso_resource_once(struct client *client, void *buffer) | |
1221 | { | |
1222 | struct fw_cdev_allocate_iso_resource *request = buffer; | |
1223 | ||
1224 | return init_iso_resource(client, request, ISO_RES_DEALLOC_ONCE); | |
1225 | } | |
1226 | ||
33580a3e SR |
1227 | static int ioctl_get_speed(struct client *client, void *buffer) |
1228 | { | |
1229 | struct fw_cdev_get_speed *request = buffer; | |
1230 | ||
1231 | request->max_speed = client->device->max_speed; | |
1232 | ||
1233 | return 0; | |
1234 | } | |
1235 | ||
acfe8333 JFSR |
1236 | static int ioctl_send_broadcast_request(struct client *client, void *buffer) |
1237 | { | |
1238 | struct fw_cdev_send_request *request = buffer; | |
1239 | ||
1240 | switch (request->tcode) { | |
1241 | case TCODE_WRITE_QUADLET_REQUEST: | |
1242 | case TCODE_WRITE_BLOCK_REQUEST: | |
1243 | break; | |
1244 | default: | |
1245 | return -EINVAL; | |
1246 | } | |
1247 | ||
1566f3dc SR |
1248 | /* Security policy: Only allow accesses to Units Space. */ |
1249 | if (request->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END) | |
1250 | return -EACCES; | |
1251 | ||
acfe8333 JFSR |
1252 | return init_request(client, request, LOCAL_BUS | 0x3f, SCODE_100); |
1253 | } | |
1254 | ||
4f259223 KH |
1255 | static int (* const ioctl_handlers[])(struct client *client, void *buffer) = { |
1256 | ioctl_get_info, | |
1257 | ioctl_send_request, | |
1258 | ioctl_allocate, | |
1259 | ioctl_deallocate, | |
1260 | ioctl_send_response, | |
1261 | ioctl_initiate_bus_reset, | |
1262 | ioctl_add_descriptor, | |
1263 | ioctl_remove_descriptor, | |
1264 | ioctl_create_iso_context, | |
1265 | ioctl_queue_iso, | |
1266 | ioctl_start_iso, | |
1267 | ioctl_stop_iso, | |
a64408b9 | 1268 | ioctl_get_cycle_timer, |
b1bda4cd JFSR |
1269 | ioctl_allocate_iso_resource, |
1270 | ioctl_deallocate_iso_resource, | |
1ec3c026 SR |
1271 | ioctl_allocate_iso_resource_once, |
1272 | ioctl_deallocate_iso_resource_once, | |
33580a3e | 1273 | ioctl_get_speed, |
acfe8333 | 1274 | ioctl_send_broadcast_request, |
4f259223 KH |
1275 | }; |
1276 | ||
53dca511 SR |
1277 | static int dispatch_ioctl(struct client *client, |
1278 | unsigned int cmd, void __user *arg) | |
19a15b93 | 1279 | { |
4f259223 | 1280 | char buffer[256]; |
2dbd7d7e | 1281 | int ret; |
4f259223 KH |
1282 | |
1283 | if (_IOC_TYPE(cmd) != '#' || | |
1284 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers)) | |
19a15b93 | 1285 | return -EINVAL; |
4f259223 KH |
1286 | |
1287 | if (_IOC_DIR(cmd) & _IOC_WRITE) { | |
2d826cc5 | 1288 | if (_IOC_SIZE(cmd) > sizeof(buffer) || |
4f259223 KH |
1289 | copy_from_user(buffer, arg, _IOC_SIZE(cmd))) |
1290 | return -EFAULT; | |
1291 | } | |
1292 | ||
2dbd7d7e SR |
1293 | ret = ioctl_handlers[_IOC_NR(cmd)](client, buffer); |
1294 | if (ret < 0) | |
1295 | return ret; | |
4f259223 KH |
1296 | |
1297 | if (_IOC_DIR(cmd) & _IOC_READ) { | |
2d826cc5 | 1298 | if (_IOC_SIZE(cmd) > sizeof(buffer) || |
4f259223 KH |
1299 | copy_to_user(arg, buffer, _IOC_SIZE(cmd))) |
1300 | return -EFAULT; | |
19a15b93 | 1301 | } |
4f259223 | 1302 | |
2dbd7d7e | 1303 | return ret; |
19a15b93 KH |
1304 | } |
1305 | ||
53dca511 SR |
1306 | static long fw_device_op_ioctl(struct file *file, |
1307 | unsigned int cmd, unsigned long arg) | |
19a15b93 KH |
1308 | { |
1309 | struct client *client = file->private_data; | |
1310 | ||
551f4cb9 JF |
1311 | if (fw_device_is_shutdown(client->device)) |
1312 | return -ENODEV; | |
1313 | ||
19a15b93 KH |
1314 | return dispatch_ioctl(client, cmd, (void __user *) arg); |
1315 | } | |
1316 | ||
1317 | #ifdef CONFIG_COMPAT | |
53dca511 SR |
1318 | static long fw_device_op_compat_ioctl(struct file *file, |
1319 | unsigned int cmd, unsigned long arg) | |
19a15b93 KH |
1320 | { |
1321 | struct client *client = file->private_data; | |
1322 | ||
551f4cb9 JF |
1323 | if (fw_device_is_shutdown(client->device)) |
1324 | return -ENODEV; | |
1325 | ||
19a15b93 KH |
1326 | return dispatch_ioctl(client, cmd, compat_ptr(arg)); |
1327 | } | |
1328 | #endif | |
1329 | ||
1330 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
1331 | { | |
1332 | struct client *client = file->private_data; | |
9aad8125 KH |
1333 | enum dma_data_direction direction; |
1334 | unsigned long size; | |
2dbd7d7e | 1335 | int page_count, ret; |
9aad8125 | 1336 | |
551f4cb9 JF |
1337 | if (fw_device_is_shutdown(client->device)) |
1338 | return -ENODEV; | |
1339 | ||
9aad8125 KH |
1340 | /* FIXME: We could support multiple buffers, but we don't. */ |
1341 | if (client->buffer.pages != NULL) | |
1342 | return -EBUSY; | |
1343 | ||
1344 | if (!(vma->vm_flags & VM_SHARED)) | |
1345 | return -EINVAL; | |
19a15b93 | 1346 | |
9aad8125 | 1347 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
1348 | return -EINVAL; |
1349 | ||
1350 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
1351 | size = vma->vm_end - vma->vm_start; |
1352 | page_count = size >> PAGE_SHIFT; | |
1353 | if (size & ~PAGE_MASK) | |
1354 | return -EINVAL; | |
1355 | ||
1356 | if (vma->vm_flags & VM_WRITE) | |
1357 | direction = DMA_TO_DEVICE; | |
1358 | else | |
1359 | direction = DMA_FROM_DEVICE; | |
1360 | ||
2dbd7d7e SR |
1361 | ret = fw_iso_buffer_init(&client->buffer, client->device->card, |
1362 | page_count, direction); | |
1363 | if (ret < 0) | |
1364 | return ret; | |
19a15b93 | 1365 | |
2dbd7d7e SR |
1366 | ret = fw_iso_buffer_map(&client->buffer, vma); |
1367 | if (ret < 0) | |
9aad8125 KH |
1368 | fw_iso_buffer_destroy(&client->buffer, client->device->card); |
1369 | ||
2dbd7d7e | 1370 | return ret; |
19a15b93 KH |
1371 | } |
1372 | ||
45ee3199 JF |
1373 | static int shutdown_resource(int id, void *p, void *data) |
1374 | { | |
1375 | struct client_resource *r = p; | |
1376 | struct client *client = data; | |
1377 | ||
1378 | r->release(client, r); | |
fb443036 | 1379 | client_put(client); |
45ee3199 JF |
1380 | |
1381 | return 0; | |
1382 | } | |
1383 | ||
19a15b93 KH |
1384 | static int fw_device_op_release(struct inode *inode, struct file *file) |
1385 | { | |
1386 | struct client *client = file->private_data; | |
2603bf21 | 1387 | struct event *e, *next_e; |
45ee3199 | 1388 | unsigned long flags; |
19a15b93 | 1389 | |
97811e34 SR |
1390 | mutex_lock(&client->device->client_list_mutex); |
1391 | list_del(&client->link); | |
1392 | mutex_unlock(&client->device->client_list_mutex); | |
1393 | ||
9aad8125 KH |
1394 | if (client->buffer.pages) |
1395 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
1396 | ||
19a15b93 KH |
1397 | if (client->iso_context) |
1398 | fw_iso_context_destroy(client->iso_context); | |
1399 | ||
45ee3199 JF |
1400 | /* Freeze client->resource_idr and client->event_list */ |
1401 | spin_lock_irqsave(&client->lock, flags); | |
1402 | client->in_shutdown = true; | |
1403 | spin_unlock_irqrestore(&client->lock, flags); | |
66dea3e5 | 1404 | |
45ee3199 JF |
1405 | idr_for_each(&client->resource_idr, shutdown_resource, client); |
1406 | idr_remove_all(&client->resource_idr); | |
1407 | idr_destroy(&client->resource_idr); | |
28cf6a04 | 1408 | |
2603bf21 KH |
1409 | list_for_each_entry_safe(e, next_e, &client->event_list, link) |
1410 | kfree(e); | |
19a15b93 | 1411 | |
fb443036 | 1412 | client_put(client); |
19a15b93 KH |
1413 | |
1414 | return 0; | |
1415 | } | |
1416 | ||
1417 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
1418 | { | |
1419 | struct client *client = file->private_data; | |
2603bf21 | 1420 | unsigned int mask = 0; |
19a15b93 KH |
1421 | |
1422 | poll_wait(file, &client->wait, pt); | |
1423 | ||
2603bf21 KH |
1424 | if (fw_device_is_shutdown(client->device)) |
1425 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 1426 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
1427 | mask |= POLLIN | POLLRDNORM; |
1428 | ||
1429 | return mask; | |
19a15b93 KH |
1430 | } |
1431 | ||
21ebcd12 | 1432 | const struct file_operations fw_device_ops = { |
19a15b93 KH |
1433 | .owner = THIS_MODULE, |
1434 | .open = fw_device_op_open, | |
1435 | .read = fw_device_op_read, | |
1436 | .unlocked_ioctl = fw_device_op_ioctl, | |
1437 | .poll = fw_device_op_poll, | |
1438 | .release = fw_device_op_release, | |
1439 | .mmap = fw_device_op_mmap, | |
1440 | ||
1441 | #ifdef CONFIG_COMPAT | |
5af4e5ea | 1442 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
1443 | #endif |
1444 | }; |