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 | ||
eb5b35a5 | 21 | #include <linux/bug.h> |
be5bbd67 SR |
22 | #include <linux/compat.h> |
23 | #include <linux/delay.h> | |
24 | #include <linux/device.h> | |
25 | #include <linux/errno.h> | |
77c9a5da | 26 | #include <linux/firewire.h> |
be5bbd67 SR |
27 | #include <linux/firewire-cdev.h> |
28 | #include <linux/idr.h> | |
4a9bde9b | 29 | #include <linux/irqflags.h> |
b1bda4cd | 30 | #include <linux/jiffies.h> |
19a15b93 | 31 | #include <linux/kernel.h> |
fb443036 | 32 | #include <linux/kref.h> |
be5bbd67 SR |
33 | #include <linux/mm.h> |
34 | #include <linux/module.h> | |
d67cfb96 | 35 | #include <linux/mutex.h> |
19a15b93 | 36 | #include <linux/poll.h> |
a99bbaf5 | 37 | #include <linux/sched.h> |
cf417e54 | 38 | #include <linux/spinlock.h> |
281e2032 | 39 | #include <linux/string.h> |
be5bbd67 | 40 | #include <linux/time.h> |
e034d242 | 41 | #include <linux/uaccess.h> |
be5bbd67 SR |
42 | #include <linux/vmalloc.h> |
43 | #include <linux/wait.h> | |
b1bda4cd | 44 | #include <linux/workqueue.h> |
be5bbd67 | 45 | |
a64408b9 | 46 | #include <asm/system.h> |
be5bbd67 | 47 | |
77c9a5da | 48 | #include "core.h" |
19a15b93 | 49 | |
604f4516 SR |
50 | /* |
51 | * ABI version history is documented in linux/firewire-cdev.h. | |
52 | */ | |
e205597d SR |
53 | #define FW_CDEV_KERNEL_VERSION 4 |
54 | #define FW_CDEV_VERSION_EVENT_REQUEST2 4 | |
604f4516 | 55 | |
19a15b93 | 56 | struct client { |
344bbc4d | 57 | u32 version; |
19a15b93 | 58 | struct fw_device *device; |
45ee3199 | 59 | |
19a15b93 | 60 | spinlock_t lock; |
45ee3199 JF |
61 | bool in_shutdown; |
62 | struct idr resource_idr; | |
19a15b93 | 63 | struct list_head event_list; |
19a15b93 | 64 | wait_queue_head_t wait; |
da8ecffa | 65 | u64 bus_reset_closure; |
9aad8125 | 66 | |
19a15b93 | 67 | struct fw_iso_context *iso_context; |
abaa5743 | 68 | u64 iso_closure; |
9aad8125 KH |
69 | struct fw_iso_buffer buffer; |
70 | unsigned long vm_start; | |
97bd9efa | 71 | |
bf54e146 SR |
72 | struct list_head phy_receiver_link; |
73 | u64 phy_receiver_closure; | |
74 | ||
97bd9efa | 75 | struct list_head link; |
fb443036 | 76 | struct kref kref; |
19a15b93 KH |
77 | }; |
78 | ||
fb443036 SR |
79 | static inline void client_get(struct client *client) |
80 | { | |
81 | kref_get(&client->kref); | |
82 | } | |
83 | ||
84 | static void client_release(struct kref *kref) | |
85 | { | |
86 | struct client *client = container_of(kref, struct client, kref); | |
87 | ||
88 | fw_device_put(client->device); | |
89 | kfree(client); | |
90 | } | |
91 | ||
92 | static void client_put(struct client *client) | |
93 | { | |
94 | kref_put(&client->kref, client_release); | |
95 | } | |
96 | ||
97c18b7f SR |
97 | struct client_resource; |
98 | typedef void (*client_resource_release_fn_t)(struct client *, | |
99 | struct client_resource *); | |
100 | struct client_resource { | |
101 | client_resource_release_fn_t release; | |
102 | int handle; | |
103 | }; | |
104 | ||
105 | struct address_handler_resource { | |
106 | struct client_resource resource; | |
107 | struct fw_address_handler handler; | |
108 | __u64 closure; | |
109 | struct client *client; | |
110 | }; | |
111 | ||
112 | struct outbound_transaction_resource { | |
113 | struct client_resource resource; | |
114 | struct fw_transaction transaction; | |
115 | }; | |
116 | ||
117 | struct inbound_transaction_resource { | |
118 | struct client_resource resource; | |
08bd34c9 | 119 | struct fw_card *card; |
97c18b7f SR |
120 | struct fw_request *request; |
121 | void *data; | |
122 | size_t length; | |
123 | }; | |
124 | ||
125 | struct descriptor_resource { | |
126 | struct client_resource resource; | |
127 | struct fw_descriptor descriptor; | |
128 | u32 data[0]; | |
129 | }; | |
130 | ||
b1bda4cd JFSR |
131 | struct iso_resource { |
132 | struct client_resource resource; | |
133 | struct client *client; | |
134 | /* Schedule work and access todo only with client->lock held. */ | |
135 | struct delayed_work work; | |
1ec3c026 SR |
136 | enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC, |
137 | ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo; | |
b1bda4cd JFSR |
138 | int generation; |
139 | u64 channels; | |
140 | s32 bandwidth; | |
6fdc0370 | 141 | __be32 transaction_data[2]; |
b1bda4cd JFSR |
142 | struct iso_resource_event *e_alloc, *e_dealloc; |
143 | }; | |
144 | ||
b1bda4cd JFSR |
145 | static void release_iso_resource(struct client *, struct client_resource *); |
146 | ||
9fb551bf SR |
147 | static void schedule_iso_resource(struct iso_resource *r, unsigned long delay) |
148 | { | |
149 | client_get(r->client); | |
150 | if (!schedule_delayed_work(&r->work, delay)) | |
151 | client_put(r->client); | |
152 | } | |
153 | ||
154 | static void schedule_if_iso_resource(struct client_resource *resource) | |
155 | { | |
156 | if (resource->release == release_iso_resource) | |
157 | schedule_iso_resource(container_of(resource, | |
158 | struct iso_resource, resource), 0); | |
159 | } | |
160 | ||
97c18b7f SR |
161 | /* |
162 | * dequeue_event() just kfree()'s the event, so the event has to be | |
163 | * the first field in a struct XYZ_event. | |
164 | */ | |
165 | struct event { | |
166 | struct { void *data; size_t size; } v[2]; | |
167 | struct list_head link; | |
168 | }; | |
169 | ||
170 | struct bus_reset_event { | |
171 | struct event event; | |
172 | struct fw_cdev_event_bus_reset reset; | |
173 | }; | |
174 | ||
175 | struct outbound_transaction_event { | |
176 | struct event event; | |
177 | struct client *client; | |
178 | struct outbound_transaction_resource r; | |
179 | struct fw_cdev_event_response response; | |
180 | }; | |
181 | ||
182 | struct inbound_transaction_event { | |
183 | struct event event; | |
e205597d SR |
184 | union { |
185 | struct fw_cdev_event_request request; | |
186 | struct fw_cdev_event_request2 request2; | |
187 | } req; | |
97c18b7f SR |
188 | }; |
189 | ||
190 | struct iso_interrupt_event { | |
191 | struct event event; | |
192 | struct fw_cdev_event_iso_interrupt interrupt; | |
193 | }; | |
194 | ||
b1bda4cd JFSR |
195 | struct iso_resource_event { |
196 | struct event event; | |
e21fcf79 | 197 | struct fw_cdev_event_iso_resource iso_resource; |
b1bda4cd JFSR |
198 | }; |
199 | ||
850bb6f2 SR |
200 | struct outbound_phy_packet_event { |
201 | struct event event; | |
202 | struct client *client; | |
203 | struct fw_packet p; | |
204 | struct fw_cdev_event_phy_packet phy_packet; | |
205 | }; | |
206 | ||
bf54e146 SR |
207 | struct inbound_phy_packet_event { |
208 | struct event event; | |
209 | struct fw_cdev_event_phy_packet phy_packet; | |
210 | }; | |
211 | ||
53dca511 | 212 | static inline void __user *u64_to_uptr(__u64 value) |
19a15b93 KH |
213 | { |
214 | return (void __user *)(unsigned long)value; | |
215 | } | |
216 | ||
53dca511 | 217 | static inline __u64 uptr_to_u64(void __user *ptr) |
19a15b93 KH |
218 | { |
219 | return (__u64)(unsigned long)ptr; | |
220 | } | |
221 | ||
222 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
223 | { | |
224 | struct fw_device *device; | |
225 | struct client *client; | |
226 | ||
96b19062 | 227 | device = fw_device_get_by_devt(inode->i_rdev); |
a3aca3da KH |
228 | if (device == NULL) |
229 | return -ENODEV; | |
19a15b93 | 230 | |
551f4cb9 JF |
231 | if (fw_device_is_shutdown(device)) { |
232 | fw_device_put(device); | |
233 | return -ENODEV; | |
234 | } | |
235 | ||
2d826cc5 | 236 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
96b19062 SR |
237 | if (client == NULL) { |
238 | fw_device_put(device); | |
19a15b93 | 239 | return -ENOMEM; |
96b19062 | 240 | } |
19a15b93 | 241 | |
96b19062 | 242 | client->device = device; |
19a15b93 | 243 | spin_lock_init(&client->lock); |
45ee3199 JF |
244 | idr_init(&client->resource_idr); |
245 | INIT_LIST_HEAD(&client->event_list); | |
19a15b93 | 246 | init_waitqueue_head(&client->wait); |
bf54e146 | 247 | INIT_LIST_HEAD(&client->phy_receiver_link); |
fb443036 | 248 | kref_init(&client->kref); |
19a15b93 KH |
249 | |
250 | file->private_data = client; | |
251 | ||
d67cfb96 | 252 | mutex_lock(&device->client_list_mutex); |
97bd9efa | 253 | list_add_tail(&client->link, &device->client_list); |
d67cfb96 | 254 | mutex_unlock(&device->client_list_mutex); |
97bd9efa | 255 | |
3ac26b2e | 256 | return nonseekable_open(inode, file); |
19a15b93 KH |
257 | } |
258 | ||
259 | static void queue_event(struct client *client, struct event *event, | |
260 | void *data0, size_t size0, void *data1, size_t size1) | |
261 | { | |
262 | unsigned long flags; | |
263 | ||
264 | event->v[0].data = data0; | |
265 | event->v[0].size = size0; | |
266 | event->v[1].data = data1; | |
267 | event->v[1].size = size1; | |
268 | ||
269 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
270 | if (client->in_shutdown) |
271 | kfree(event); | |
272 | else | |
273 | list_add_tail(&event->link, &client->event_list); | |
19a15b93 | 274 | spin_unlock_irqrestore(&client->lock, flags); |
83431cba JF |
275 | |
276 | wake_up_interruptible(&client->wait); | |
19a15b93 KH |
277 | } |
278 | ||
53dca511 SR |
279 | static int dequeue_event(struct client *client, |
280 | char __user *buffer, size_t count) | |
19a15b93 | 281 | { |
19a15b93 KH |
282 | struct event *event; |
283 | size_t size, total; | |
2dbd7d7e | 284 | int i, ret; |
19a15b93 | 285 | |
2dbd7d7e SR |
286 | ret = wait_event_interruptible(client->wait, |
287 | !list_empty(&client->event_list) || | |
288 | fw_device_is_shutdown(client->device)); | |
289 | if (ret < 0) | |
290 | return ret; | |
19a15b93 | 291 | |
2603bf21 KH |
292 | if (list_empty(&client->event_list) && |
293 | fw_device_is_shutdown(client->device)) | |
294 | return -ENODEV; | |
19a15b93 | 295 | |
3ba94986 | 296 | spin_lock_irq(&client->lock); |
a459b8ab | 297 | event = list_first_entry(&client->event_list, struct event, link); |
19a15b93 | 298 | list_del(&event->link); |
3ba94986 | 299 | spin_unlock_irq(&client->lock); |
19a15b93 | 300 | |
19a15b93 KH |
301 | total = 0; |
302 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
303 | size = min(event->v[i].size, count - total); | |
2603bf21 | 304 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
2dbd7d7e | 305 | ret = -EFAULT; |
19a15b93 | 306 | goto out; |
2603bf21 | 307 | } |
19a15b93 KH |
308 | total += size; |
309 | } | |
2dbd7d7e | 310 | ret = total; |
19a15b93 KH |
311 | |
312 | out: | |
313 | kfree(event); | |
314 | ||
2dbd7d7e | 315 | return ret; |
19a15b93 KH |
316 | } |
317 | ||
53dca511 SR |
318 | static ssize_t fw_device_op_read(struct file *file, char __user *buffer, |
319 | size_t count, loff_t *offset) | |
19a15b93 KH |
320 | { |
321 | struct client *client = file->private_data; | |
322 | ||
323 | return dequeue_event(client, buffer, count); | |
324 | } | |
325 | ||
53dca511 SR |
326 | static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, |
327 | struct client *client) | |
344bbc4d | 328 | { |
da8ecffa | 329 | struct fw_card *card = client->device->card; |
cf417e54 | 330 | |
3ba94986 | 331 | spin_lock_irq(&card->lock); |
344bbc4d | 332 | |
da8ecffa | 333 | event->closure = client->bus_reset_closure; |
344bbc4d | 334 | event->type = FW_CDEV_EVENT_BUS_RESET; |
cf5a56ac | 335 | event->generation = client->device->generation; |
da8ecffa | 336 | event->node_id = client->device->node_id; |
344bbc4d | 337 | event->local_node_id = card->local_node->node_id; |
250b2b6d | 338 | event->bm_node_id = card->bm_node_id; |
344bbc4d KH |
339 | event->irm_node_id = card->irm_node->node_id; |
340 | event->root_node_id = card->root_node->node_id; | |
cf417e54 | 341 | |
3ba94986 | 342 | spin_unlock_irq(&card->lock); |
344bbc4d KH |
343 | } |
344 | ||
53dca511 SR |
345 | static void for_each_client(struct fw_device *device, |
346 | void (*callback)(struct client *client)) | |
2603bf21 | 347 | { |
2603bf21 | 348 | struct client *c; |
2603bf21 | 349 | |
d67cfb96 | 350 | mutex_lock(&device->client_list_mutex); |
2603bf21 KH |
351 | list_for_each_entry(c, &device->client_list, link) |
352 | callback(c); | |
d67cfb96 | 353 | mutex_unlock(&device->client_list_mutex); |
2603bf21 KH |
354 | } |
355 | ||
b1bda4cd JFSR |
356 | static int schedule_reallocations(int id, void *p, void *data) |
357 | { | |
9fb551bf | 358 | schedule_if_iso_resource(p); |
b1bda4cd | 359 | |
b1bda4cd JFSR |
360 | return 0; |
361 | } | |
362 | ||
53dca511 | 363 | static void queue_bus_reset_event(struct client *client) |
97bd9efa | 364 | { |
97c18b7f | 365 | struct bus_reset_event *e; |
97bd9efa | 366 | |
97c18b7f SR |
367 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
368 | if (e == NULL) { | |
bf54e146 | 369 | fw_notify("Out of memory when allocating event\n"); |
97bd9efa KH |
370 | return; |
371 | } | |
372 | ||
97c18b7f | 373 | fill_bus_reset_event(&e->reset, client); |
97bd9efa | 374 | |
97c18b7f SR |
375 | queue_event(client, &e->event, |
376 | &e->reset, sizeof(e->reset), NULL, 0); | |
b1bda4cd JFSR |
377 | |
378 | spin_lock_irq(&client->lock); | |
379 | idr_for_each(&client->resource_idr, schedule_reallocations, client); | |
380 | spin_unlock_irq(&client->lock); | |
97bd9efa KH |
381 | } |
382 | ||
383 | void fw_device_cdev_update(struct fw_device *device) | |
384 | { | |
2603bf21 KH |
385 | for_each_client(device, queue_bus_reset_event); |
386 | } | |
97bd9efa | 387 | |
2603bf21 KH |
388 | static void wake_up_client(struct client *client) |
389 | { | |
390 | wake_up_interruptible(&client->wait); | |
391 | } | |
97bd9efa | 392 | |
2603bf21 KH |
393 | void fw_device_cdev_remove(struct fw_device *device) |
394 | { | |
395 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
396 | } |
397 | ||
6e95dea7 SR |
398 | union ioctl_arg { |
399 | struct fw_cdev_get_info get_info; | |
400 | struct fw_cdev_send_request send_request; | |
401 | struct fw_cdev_allocate allocate; | |
402 | struct fw_cdev_deallocate deallocate; | |
403 | struct fw_cdev_send_response send_response; | |
404 | struct fw_cdev_initiate_bus_reset initiate_bus_reset; | |
405 | struct fw_cdev_add_descriptor add_descriptor; | |
406 | struct fw_cdev_remove_descriptor remove_descriptor; | |
407 | struct fw_cdev_create_iso_context create_iso_context; | |
408 | struct fw_cdev_queue_iso queue_iso; | |
409 | struct fw_cdev_start_iso start_iso; | |
410 | struct fw_cdev_stop_iso stop_iso; | |
411 | struct fw_cdev_get_cycle_timer get_cycle_timer; | |
412 | struct fw_cdev_allocate_iso_resource allocate_iso_resource; | |
413 | struct fw_cdev_send_stream_packet send_stream_packet; | |
414 | struct fw_cdev_get_cycle_timer2 get_cycle_timer2; | |
850bb6f2 | 415 | struct fw_cdev_send_phy_packet send_phy_packet; |
bf54e146 | 416 | struct fw_cdev_receive_phy_packets receive_phy_packets; |
6e95dea7 SR |
417 | }; |
418 | ||
419 | static int ioctl_get_info(struct client *client, union ioctl_arg *arg) | |
19a15b93 | 420 | { |
6e95dea7 | 421 | struct fw_cdev_get_info *a = &arg->get_info; |
344bbc4d | 422 | struct fw_cdev_event_bus_reset bus_reset; |
c9755e14 | 423 | unsigned long ret = 0; |
344bbc4d | 424 | |
6e95dea7 | 425 | client->version = a->version; |
604f4516 | 426 | a->version = FW_CDEV_KERNEL_VERSION; |
6e95dea7 | 427 | a->card = client->device->card->index; |
344bbc4d | 428 | |
c9755e14 SR |
429 | down_read(&fw_device_rwsem); |
430 | ||
6e95dea7 SR |
431 | if (a->rom != 0) { |
432 | size_t want = a->rom_length; | |
d84702a5 | 433 | size_t have = client->device->config_rom_length * 4; |
344bbc4d | 434 | |
6e95dea7 SR |
435 | ret = copy_to_user(u64_to_uptr(a->rom), |
436 | client->device->config_rom, min(want, have)); | |
344bbc4d | 437 | } |
6e95dea7 | 438 | a->rom_length = client->device->config_rom_length * 4; |
344bbc4d | 439 | |
c9755e14 SR |
440 | up_read(&fw_device_rwsem); |
441 | ||
442 | if (ret != 0) | |
443 | return -EFAULT; | |
444 | ||
6e95dea7 SR |
445 | client->bus_reset_closure = a->bus_reset_closure; |
446 | if (a->bus_reset != 0) { | |
da8ecffa | 447 | fill_bus_reset_event(&bus_reset, client); |
6e95dea7 SR |
448 | if (copy_to_user(u64_to_uptr(a->bus_reset), |
449 | &bus_reset, sizeof(bus_reset))) | |
344bbc4d KH |
450 | return -EFAULT; |
451 | } | |
19a15b93 | 452 | |
19a15b93 KH |
453 | return 0; |
454 | } | |
455 | ||
53dca511 SR |
456 | static int add_client_resource(struct client *client, |
457 | struct client_resource *resource, gfp_t gfp_mask) | |
3964a449 KH |
458 | { |
459 | unsigned long flags; | |
45ee3199 JF |
460 | int ret; |
461 | ||
462 | retry: | |
463 | if (idr_pre_get(&client->resource_idr, gfp_mask) == 0) | |
464 | return -ENOMEM; | |
3964a449 KH |
465 | |
466 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
467 | if (client->in_shutdown) |
468 | ret = -ECANCELED; | |
469 | else | |
470 | ret = idr_get_new(&client->resource_idr, resource, | |
471 | &resource->handle); | |
b1bda4cd | 472 | if (ret >= 0) { |
fb443036 | 473 | client_get(client); |
9fb551bf | 474 | schedule_if_iso_resource(resource); |
b1bda4cd | 475 | } |
3964a449 | 476 | spin_unlock_irqrestore(&client->lock, flags); |
45ee3199 JF |
477 | |
478 | if (ret == -EAGAIN) | |
479 | goto retry; | |
480 | ||
481 | return ret < 0 ? ret : 0; | |
3964a449 KH |
482 | } |
483 | ||
53dca511 SR |
484 | static int release_client_resource(struct client *client, u32 handle, |
485 | client_resource_release_fn_t release, | |
e21fcf79 | 486 | struct client_resource **return_resource) |
3964a449 | 487 | { |
e21fcf79 | 488 | struct client_resource *resource; |
3964a449 | 489 | |
3ba94986 | 490 | spin_lock_irq(&client->lock); |
45ee3199 | 491 | if (client->in_shutdown) |
e21fcf79 | 492 | resource = NULL; |
45ee3199 | 493 | else |
e21fcf79 SR |
494 | resource = idr_find(&client->resource_idr, handle); |
495 | if (resource && resource->release == release) | |
45ee3199 | 496 | idr_remove(&client->resource_idr, handle); |
3ba94986 | 497 | spin_unlock_irq(&client->lock); |
3964a449 | 498 | |
e21fcf79 | 499 | if (!(resource && resource->release == release)) |
3964a449 KH |
500 | return -EINVAL; |
501 | ||
e21fcf79 SR |
502 | if (return_resource) |
503 | *return_resource = resource; | |
3964a449 | 504 | else |
e21fcf79 | 505 | resource->release(client, resource); |
3964a449 | 506 | |
fb443036 SR |
507 | client_put(client); |
508 | ||
3964a449 KH |
509 | return 0; |
510 | } | |
511 | ||
53dca511 SR |
512 | static void release_transaction(struct client *client, |
513 | struct client_resource *resource) | |
3964a449 | 514 | { |
97c18b7f SR |
515 | struct outbound_transaction_resource *r = container_of(resource, |
516 | struct outbound_transaction_resource, resource); | |
3964a449 | 517 | |
97c18b7f | 518 | fw_cancel_transaction(client->device->card, &r->transaction); |
3964a449 KH |
519 | } |
520 | ||
53dca511 SR |
521 | static void complete_transaction(struct fw_card *card, int rcode, |
522 | void *payload, size_t length, void *data) | |
19a15b93 | 523 | { |
97c18b7f SR |
524 | struct outbound_transaction_event *e = data; |
525 | struct fw_cdev_event_response *rsp = &e->response; | |
526 | struct client *client = e->client; | |
28cf6a04 | 527 | unsigned long flags; |
19a15b93 | 528 | |
97c18b7f SR |
529 | if (length < rsp->length) |
530 | rsp->length = length; | |
19a15b93 | 531 | if (rcode == RCODE_COMPLETE) |
97c18b7f | 532 | memcpy(rsp->data, payload, rsp->length); |
19a15b93 | 533 | |
28cf6a04 | 534 | spin_lock_irqsave(&client->lock, flags); |
45ee3199 | 535 | /* |
fb443036 SR |
536 | * 1. If called while in shutdown, the idr tree must be left untouched. |
537 | * The idr handle will be removed and the client reference will be | |
538 | * dropped later. | |
539 | * 2. If the call chain was release_client_resource -> | |
540 | * release_transaction -> complete_transaction (instead of a normal | |
541 | * conclusion of the transaction), i.e. if this resource was already | |
542 | * unregistered from the idr, the client reference will be dropped | |
543 | * by release_client_resource and we must not drop it here. | |
45ee3199 | 544 | */ |
fb443036 | 545 | if (!client->in_shutdown && |
97c18b7f SR |
546 | idr_find(&client->resource_idr, e->r.resource.handle)) { |
547 | idr_remove(&client->resource_idr, e->r.resource.handle); | |
fb443036 SR |
548 | /* Drop the idr's reference */ |
549 | client_put(client); | |
550 | } | |
28cf6a04 KH |
551 | spin_unlock_irqrestore(&client->lock, flags); |
552 | ||
97c18b7f SR |
553 | rsp->type = FW_CDEV_EVENT_RESPONSE; |
554 | rsp->rcode = rcode; | |
8401d92b DM |
555 | |
556 | /* | |
97c18b7f | 557 | * In the case that sizeof(*rsp) doesn't align with the position of the |
8401d92b DM |
558 | * data, and the read is short, preserve an extra copy of the data |
559 | * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless | |
560 | * for short reads and some apps depended on it, this is both safe | |
561 | * and prudent for compatibility. | |
562 | */ | |
97c18b7f SR |
563 | if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data)) |
564 | queue_event(client, &e->event, rsp, sizeof(*rsp), | |
565 | rsp->data, rsp->length); | |
8401d92b | 566 | else |
97c18b7f | 567 | queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length, |
8401d92b | 568 | NULL, 0); |
fb443036 SR |
569 | |
570 | /* Drop the transaction callback's reference */ | |
571 | client_put(client); | |
19a15b93 KH |
572 | } |
573 | ||
acfe8333 JFSR |
574 | static int init_request(struct client *client, |
575 | struct fw_cdev_send_request *request, | |
576 | int destination_id, int speed) | |
19a15b93 | 577 | { |
97c18b7f | 578 | struct outbound_transaction_event *e; |
1f3125af | 579 | int ret; |
19a15b93 | 580 | |
18e9b10f SR |
581 | if (request->tcode != TCODE_STREAM_DATA && |
582 | (request->length > 4096 || request->length > 512 << speed)) | |
5d3fd692 | 583 | return -EIO; |
19a15b93 | 584 | |
a8e93f3d CL |
585 | if (request->tcode == TCODE_WRITE_QUADLET_REQUEST && |
586 | request->length < 4) | |
587 | return -EINVAL; | |
588 | ||
97c18b7f SR |
589 | e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL); |
590 | if (e == NULL) | |
19a15b93 KH |
591 | return -ENOMEM; |
592 | ||
97c18b7f SR |
593 | e->client = client; |
594 | e->response.length = request->length; | |
595 | e->response.closure = request->closure; | |
19a15b93 | 596 | |
4f259223 | 597 | if (request->data && |
97c18b7f | 598 | copy_from_user(e->response.data, |
4f259223 | 599 | u64_to_uptr(request->data), request->length)) { |
1f3125af | 600 | ret = -EFAULT; |
45ee3199 | 601 | goto failed; |
1f3125af SR |
602 | } |
603 | ||
97c18b7f SR |
604 | e->r.resource.release = release_transaction; |
605 | ret = add_client_resource(client, &e->r.resource, GFP_KERNEL); | |
45ee3199 JF |
606 | if (ret < 0) |
607 | goto failed; | |
28cf6a04 | 608 | |
fb443036 SR |
609 | /* Get a reference for the transaction callback */ |
610 | client_get(client); | |
611 | ||
acfe8333 | 612 | fw_send_request(client->device->card, &e->r.transaction, |
664d8010 SR |
613 | request->tcode, destination_id, request->generation, |
614 | speed, request->offset, e->response.data, | |
615 | request->length, complete_transaction, e); | |
616 | return 0; | |
19a15b93 | 617 | |
45ee3199 | 618 | failed: |
97c18b7f | 619 | kfree(e); |
1f3125af SR |
620 | |
621 | return ret; | |
19a15b93 KH |
622 | } |
623 | ||
6e95dea7 | 624 | static int ioctl_send_request(struct client *client, union ioctl_arg *arg) |
acfe8333 | 625 | { |
6e95dea7 | 626 | switch (arg->send_request.tcode) { |
acfe8333 JFSR |
627 | case TCODE_WRITE_QUADLET_REQUEST: |
628 | case TCODE_WRITE_BLOCK_REQUEST: | |
629 | case TCODE_READ_QUADLET_REQUEST: | |
630 | case TCODE_READ_BLOCK_REQUEST: | |
631 | case TCODE_LOCK_MASK_SWAP: | |
632 | case TCODE_LOCK_COMPARE_SWAP: | |
633 | case TCODE_LOCK_FETCH_ADD: | |
634 | case TCODE_LOCK_LITTLE_ADD: | |
635 | case TCODE_LOCK_BOUNDED_ADD: | |
636 | case TCODE_LOCK_WRAP_ADD: | |
637 | case TCODE_LOCK_VENDOR_DEPENDENT: | |
638 | break; | |
639 | default: | |
640 | return -EINVAL; | |
641 | } | |
642 | ||
6e95dea7 | 643 | return init_request(client, &arg->send_request, client->device->node_id, |
acfe8333 JFSR |
644 | client->device->max_speed); |
645 | } | |
646 | ||
281e2032 SR |
647 | static inline bool is_fcp_request(struct fw_request *request) |
648 | { | |
649 | return request == NULL; | |
650 | } | |
651 | ||
53dca511 SR |
652 | static void release_request(struct client *client, |
653 | struct client_resource *resource) | |
3964a449 | 654 | { |
97c18b7f SR |
655 | struct inbound_transaction_resource *r = container_of(resource, |
656 | struct inbound_transaction_resource, resource); | |
3964a449 | 657 | |
281e2032 SR |
658 | if (is_fcp_request(r->request)) |
659 | kfree(r->data); | |
660 | else | |
08bd34c9 | 661 | fw_send_response(r->card, r->request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
662 | |
663 | fw_card_put(r->card); | |
97c18b7f | 664 | kfree(r); |
3964a449 KH |
665 | } |
666 | ||
97c18b7f | 667 | static void handle_request(struct fw_card *card, struct fw_request *request, |
53dca511 | 668 | int tcode, int destination, int source, |
33e553fe | 669 | int generation, unsigned long long offset, |
53dca511 | 670 | void *payload, size_t length, void *callback_data) |
19a15b93 | 671 | { |
97c18b7f SR |
672 | struct address_handler_resource *handler = callback_data; |
673 | struct inbound_transaction_resource *r; | |
674 | struct inbound_transaction_event *e; | |
e205597d | 675 | size_t event_size0; |
281e2032 | 676 | void *fcp_frame = NULL; |
45ee3199 | 677 | int ret; |
19a15b93 | 678 | |
0244f573 SR |
679 | /* card may be different from handler->client->device->card */ |
680 | fw_card_get(card); | |
681 | ||
97c18b7f | 682 | r = kmalloc(sizeof(*r), GFP_ATOMIC); |
2d826cc5 | 683 | e = kmalloc(sizeof(*e), GFP_ATOMIC); |
bf54e146 SR |
684 | if (r == NULL || e == NULL) { |
685 | fw_notify("Out of memory when allocating event\n"); | |
45ee3199 | 686 | goto failed; |
bf54e146 | 687 | } |
08bd34c9 | 688 | r->card = card; |
97c18b7f SR |
689 | r->request = request; |
690 | r->data = payload; | |
691 | r->length = length; | |
19a15b93 | 692 | |
281e2032 SR |
693 | if (is_fcp_request(request)) { |
694 | /* | |
695 | * FIXME: Let core-transaction.c manage a | |
696 | * single reference-counted copy? | |
697 | */ | |
698 | fcp_frame = kmemdup(payload, length, GFP_ATOMIC); | |
699 | if (fcp_frame == NULL) | |
700 | goto failed; | |
701 | ||
702 | r->data = fcp_frame; | |
703 | } | |
704 | ||
97c18b7f SR |
705 | r->resource.release = release_request; |
706 | ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC); | |
45ee3199 JF |
707 | if (ret < 0) |
708 | goto failed; | |
19a15b93 | 709 | |
e205597d SR |
710 | if (handler->client->version < FW_CDEV_VERSION_EVENT_REQUEST2) { |
711 | struct fw_cdev_event_request *req = &e->req.request; | |
712 | ||
713 | if (tcode & 0x10) | |
714 | tcode = TCODE_LOCK_REQUEST; | |
715 | ||
716 | req->type = FW_CDEV_EVENT_REQUEST; | |
717 | req->tcode = tcode; | |
718 | req->offset = offset; | |
719 | req->length = length; | |
720 | req->handle = r->resource.handle; | |
721 | req->closure = handler->closure; | |
722 | event_size0 = sizeof(*req); | |
723 | } else { | |
724 | struct fw_cdev_event_request2 *req = &e->req.request2; | |
725 | ||
726 | req->type = FW_CDEV_EVENT_REQUEST2; | |
727 | req->tcode = tcode; | |
728 | req->offset = offset; | |
729 | req->source_node_id = source; | |
730 | req->destination_node_id = destination; | |
731 | req->card = card->index; | |
732 | req->generation = generation; | |
733 | req->length = length; | |
734 | req->handle = r->resource.handle; | |
735 | req->closure = handler->closure; | |
736 | event_size0 = sizeof(*req); | |
737 | } | |
19a15b93 | 738 | |
97c18b7f | 739 | queue_event(handler->client, &e->event, |
e205597d | 740 | &e->req, event_size0, r->data, length); |
45ee3199 JF |
741 | return; |
742 | ||
743 | failed: | |
97c18b7f | 744 | kfree(r); |
45ee3199 | 745 | kfree(e); |
281e2032 SR |
746 | kfree(fcp_frame); |
747 | ||
748 | if (!is_fcp_request(request)) | |
db5d247a | 749 | fw_send_response(card, request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
750 | |
751 | fw_card_put(card); | |
19a15b93 KH |
752 | } |
753 | ||
53dca511 SR |
754 | static void release_address_handler(struct client *client, |
755 | struct client_resource *resource) | |
3964a449 | 756 | { |
97c18b7f SR |
757 | struct address_handler_resource *r = |
758 | container_of(resource, struct address_handler_resource, resource); | |
3964a449 | 759 | |
97c18b7f SR |
760 | fw_core_remove_address_handler(&r->handler); |
761 | kfree(r); | |
3964a449 KH |
762 | } |
763 | ||
6e95dea7 | 764 | static int ioctl_allocate(struct client *client, union ioctl_arg *arg) |
19a15b93 | 765 | { |
6e95dea7 | 766 | struct fw_cdev_allocate *a = &arg->allocate; |
97c18b7f | 767 | struct address_handler_resource *r; |
19a15b93 | 768 | struct fw_address_region region; |
45ee3199 | 769 | int ret; |
19a15b93 | 770 | |
97c18b7f SR |
771 | r = kmalloc(sizeof(*r), GFP_KERNEL); |
772 | if (r == NULL) | |
19a15b93 KH |
773 | return -ENOMEM; |
774 | ||
6e95dea7 SR |
775 | region.start = a->offset; |
776 | region.end = a->offset + a->length; | |
777 | r->handler.length = a->length; | |
97c18b7f | 778 | r->handler.address_callback = handle_request; |
6e95dea7 SR |
779 | r->handler.callback_data = r; |
780 | r->closure = a->closure; | |
781 | r->client = client; | |
19a15b93 | 782 | |
97c18b7f | 783 | ret = fw_core_add_address_handler(&r->handler, ®ion); |
3e0b5f0d | 784 | if (ret < 0) { |
97c18b7f | 785 | kfree(r); |
3e0b5f0d | 786 | return ret; |
19a15b93 KH |
787 | } |
788 | ||
97c18b7f SR |
789 | r->resource.release = release_address_handler; |
790 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 791 | if (ret < 0) { |
97c18b7f | 792 | release_address_handler(client, &r->resource); |
45ee3199 JF |
793 | return ret; |
794 | } | |
6e95dea7 | 795 | a->handle = r->resource.handle; |
19a15b93 KH |
796 | |
797 | return 0; | |
798 | } | |
799 | ||
6e95dea7 | 800 | static int ioctl_deallocate(struct client *client, union ioctl_arg *arg) |
9472316b | 801 | { |
6e95dea7 | 802 | return release_client_resource(client, arg->deallocate.handle, |
45ee3199 | 803 | release_address_handler, NULL); |
9472316b KH |
804 | } |
805 | ||
6e95dea7 | 806 | static int ioctl_send_response(struct client *client, union ioctl_arg *arg) |
19a15b93 | 807 | { |
6e95dea7 | 808 | struct fw_cdev_send_response *a = &arg->send_response; |
3964a449 | 809 | struct client_resource *resource; |
97c18b7f | 810 | struct inbound_transaction_resource *r; |
7e44c0b5 | 811 | int ret = 0; |
19a15b93 | 812 | |
6e95dea7 | 813 | if (release_client_resource(client, a->handle, |
45ee3199 | 814 | release_request, &resource) < 0) |
19a15b93 | 815 | return -EINVAL; |
45ee3199 | 816 | |
97c18b7f SR |
817 | r = container_of(resource, struct inbound_transaction_resource, |
818 | resource); | |
281e2032 SR |
819 | if (is_fcp_request(r->request)) |
820 | goto out; | |
821 | ||
a10c0ce7 CL |
822 | if (a->length != fw_get_response_length(r->request)) { |
823 | ret = -EINVAL; | |
824 | kfree(r->request); | |
825 | goto out; | |
826 | } | |
827 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length)) { | |
281e2032 SR |
828 | ret = -EFAULT; |
829 | kfree(r->request); | |
830 | goto out; | |
7e44c0b5 | 831 | } |
08bd34c9 | 832 | fw_send_response(r->card, r->request, a->rcode); |
7e44c0b5 | 833 | out: |
0244f573 | 834 | fw_card_put(r->card); |
19a15b93 KH |
835 | kfree(r); |
836 | ||
7e44c0b5 | 837 | return ret; |
19a15b93 KH |
838 | } |
839 | ||
6e95dea7 | 840 | static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg) |
5371842b | 841 | { |
02d37bed | 842 | fw_schedule_bus_reset(client->device->card, true, |
6e95dea7 | 843 | arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET); |
02d37bed | 844 | return 0; |
5371842b KH |
845 | } |
846 | ||
3964a449 KH |
847 | static void release_descriptor(struct client *client, |
848 | struct client_resource *resource) | |
849 | { | |
97c18b7f SR |
850 | struct descriptor_resource *r = |
851 | container_of(resource, struct descriptor_resource, resource); | |
3964a449 | 852 | |
97c18b7f SR |
853 | fw_core_remove_descriptor(&r->descriptor); |
854 | kfree(r); | |
3964a449 KH |
855 | } |
856 | ||
6e95dea7 | 857 | static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 858 | { |
6e95dea7 | 859 | struct fw_cdev_add_descriptor *a = &arg->add_descriptor; |
97c18b7f | 860 | struct descriptor_resource *r; |
45ee3199 | 861 | int ret; |
66dea3e5 | 862 | |
de487da8 | 863 | /* Access policy: Allow this ioctl only on local nodes' device files. */ |
92368890 | 864 | if (!client->device->is_local) |
de487da8 SR |
865 | return -ENOSYS; |
866 | ||
6e95dea7 | 867 | if (a->length > 256) |
66dea3e5 KH |
868 | return -EINVAL; |
869 | ||
6e95dea7 | 870 | r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL); |
97c18b7f | 871 | if (r == NULL) |
66dea3e5 KH |
872 | return -ENOMEM; |
873 | ||
6e95dea7 | 874 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) { |
45ee3199 JF |
875 | ret = -EFAULT; |
876 | goto failed; | |
66dea3e5 KH |
877 | } |
878 | ||
6e95dea7 SR |
879 | r->descriptor.length = a->length; |
880 | r->descriptor.immediate = a->immediate; | |
881 | r->descriptor.key = a->key; | |
97c18b7f | 882 | r->descriptor.data = r->data; |
66dea3e5 | 883 | |
97c18b7f | 884 | ret = fw_core_add_descriptor(&r->descriptor); |
45ee3199 JF |
885 | if (ret < 0) |
886 | goto failed; | |
66dea3e5 | 887 | |
97c18b7f SR |
888 | r->resource.release = release_descriptor; |
889 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 890 | if (ret < 0) { |
97c18b7f | 891 | fw_core_remove_descriptor(&r->descriptor); |
45ee3199 JF |
892 | goto failed; |
893 | } | |
6e95dea7 | 894 | a->handle = r->resource.handle; |
66dea3e5 KH |
895 | |
896 | return 0; | |
45ee3199 | 897 | failed: |
97c18b7f | 898 | kfree(r); |
45ee3199 JF |
899 | |
900 | return ret; | |
66dea3e5 KH |
901 | } |
902 | ||
6e95dea7 | 903 | static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 904 | { |
6e95dea7 | 905 | return release_client_resource(client, arg->remove_descriptor.handle, |
45ee3199 | 906 | release_descriptor, NULL); |
66dea3e5 KH |
907 | } |
908 | ||
53dca511 SR |
909 | static void iso_callback(struct fw_iso_context *context, u32 cycle, |
910 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
911 | { |
912 | struct client *client = data; | |
97c18b7f | 913 | struct iso_interrupt_event *e; |
19a15b93 | 914 | |
56d04cb1 | 915 | e = kmalloc(sizeof(*e) + header_length, GFP_ATOMIC); |
bf54e146 SR |
916 | if (e == NULL) { |
917 | fw_notify("Out of memory when allocating event\n"); | |
19a15b93 | 918 | return; |
bf54e146 | 919 | } |
97c18b7f SR |
920 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
921 | e->interrupt.closure = client->iso_closure; | |
922 | e->interrupt.cycle = cycle; | |
923 | e->interrupt.header_length = header_length; | |
924 | memcpy(e->interrupt.header, header, header_length); | |
925 | queue_event(client, &e->event, &e->interrupt, | |
926 | sizeof(e->interrupt) + header_length, NULL, 0); | |
19a15b93 KH |
927 | } |
928 | ||
6e95dea7 | 929 | static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) |
19a15b93 | 930 | { |
6e95dea7 | 931 | struct fw_cdev_create_iso_context *a = &arg->create_iso_context; |
24315c5e | 932 | struct fw_iso_context *context; |
19a15b93 | 933 | |
eb5b35a5 SR |
934 | BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT != FW_ISO_CONTEXT_TRANSMIT || |
935 | FW_CDEV_ISO_CONTEXT_RECEIVE != FW_ISO_CONTEXT_RECEIVE); | |
936 | ||
6e95dea7 | 937 | if (a->channel > 63) |
21efb3cf KH |
938 | return -EINVAL; |
939 | ||
6e95dea7 | 940 | switch (a->type) { |
c70dc788 | 941 | case FW_ISO_CONTEXT_RECEIVE: |
6e95dea7 | 942 | if (a->header_size < 4 || (a->header_size & 3)) |
c70dc788 | 943 | return -EINVAL; |
c70dc788 KH |
944 | break; |
945 | ||
946 | case FW_ISO_CONTEXT_TRANSMIT: | |
6e95dea7 | 947 | if (a->speed > SCODE_3200) |
c70dc788 | 948 | return -EINVAL; |
c70dc788 KH |
949 | break; |
950 | ||
951 | default: | |
21efb3cf | 952 | return -EINVAL; |
c70dc788 KH |
953 | } |
954 | ||
6e95dea7 SR |
955 | context = fw_iso_context_create(client->device->card, a->type, |
956 | a->channel, a->speed, a->header_size, | |
957 | iso_callback, client); | |
24315c5e KH |
958 | if (IS_ERR(context)) |
959 | return PTR_ERR(context); | |
960 | ||
bdfe273e CL |
961 | /* We only support one context at this time. */ |
962 | spin_lock_irq(&client->lock); | |
963 | if (client->iso_context != NULL) { | |
964 | spin_unlock_irq(&client->lock); | |
965 | fw_iso_context_destroy(context); | |
966 | return -EBUSY; | |
967 | } | |
6e95dea7 | 968 | client->iso_closure = a->closure; |
24315c5e | 969 | client->iso_context = context; |
bdfe273e | 970 | spin_unlock_irq(&client->lock); |
19a15b93 | 971 | |
6e95dea7 | 972 | a->handle = 0; |
abaa5743 | 973 | |
19a15b93 KH |
974 | return 0; |
975 | } | |
976 | ||
1ca31ae7 KH |
977 | /* Macros for decoding the iso packet control header. */ |
978 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) | |
979 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) | |
980 | #define GET_SKIP(v) (((v) >> 17) & 0x01) | |
7a100344 SR |
981 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
982 | #define GET_SY(v) (((v) >> 20) & 0x0f) | |
1ca31ae7 KH |
983 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
984 | ||
6e95dea7 | 985 | static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 986 | { |
6e95dea7 | 987 | struct fw_cdev_queue_iso *a = &arg->queue_iso; |
19a15b93 | 988 | struct fw_cdev_iso_packet __user *p, *end, *next; |
9b32d5f3 | 989 | struct fw_iso_context *ctx = client->iso_context; |
ef370ee7 | 990 | unsigned long payload, buffer_end, header_length; |
1ca31ae7 | 991 | u32 control; |
19a15b93 KH |
992 | int count; |
993 | struct { | |
994 | struct fw_iso_packet packet; | |
995 | u8 header[256]; | |
996 | } u; | |
997 | ||
6e95dea7 | 998 | if (ctx == NULL || a->handle != 0) |
19a15b93 | 999 | return -EINVAL; |
19a15b93 | 1000 | |
c781c06d KH |
1001 | /* |
1002 | * If the user passes a non-NULL data pointer, has mmap()'ed | |
19a15b93 KH |
1003 | * the iso buffer, and the pointer points inside the buffer, |
1004 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 1005 | * set them both to 0, which will still let packets with |
19a15b93 KH |
1006 | * payload_length == 0 through. In other words, if no packets |
1007 | * use the indirect payload, the iso buffer need not be mapped | |
6e95dea7 | 1008 | * and the a->data pointer is ignored. |
c781c06d | 1009 | */ |
19a15b93 | 1010 | |
6e95dea7 | 1011 | payload = (unsigned long)a->data - client->vm_start; |
ef370ee7 | 1012 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
6e95dea7 | 1013 | if (a->data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 1014 | payload >= buffer_end) { |
9aad8125 | 1015 | payload = 0; |
ef370ee7 | 1016 | buffer_end = 0; |
19a15b93 KH |
1017 | } |
1018 | ||
6e95dea7 | 1019 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets); |
1ccc9147 | 1020 | |
6e95dea7 | 1021 | if (!access_ok(VERIFY_READ, p, a->size)) |
19a15b93 KH |
1022 | return -EFAULT; |
1023 | ||
6e95dea7 | 1024 | end = (void __user *)p + a->size; |
19a15b93 KH |
1025 | count = 0; |
1026 | while (p < end) { | |
1ca31ae7 | 1027 | if (get_user(control, &p->control)) |
19a15b93 | 1028 | return -EFAULT; |
1ca31ae7 KH |
1029 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
1030 | u.packet.interrupt = GET_INTERRUPT(control); | |
1031 | u.packet.skip = GET_SKIP(control); | |
1032 | u.packet.tag = GET_TAG(control); | |
1033 | u.packet.sy = GET_SY(control); | |
1034 | u.packet.header_length = GET_HEADER_LENGTH(control); | |
295e3feb | 1035 | |
9b32d5f3 | 1036 | if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) { |
385ab5bc CL |
1037 | if (u.packet.header_length % 4 != 0) |
1038 | return -EINVAL; | |
295e3feb KH |
1039 | header_length = u.packet.header_length; |
1040 | } else { | |
c781c06d KH |
1041 | /* |
1042 | * We require that header_length is a multiple of | |
1043 | * the fixed header size, ctx->header_size. | |
1044 | */ | |
9b32d5f3 KH |
1045 | if (ctx->header_size == 0) { |
1046 | if (u.packet.header_length > 0) | |
1047 | return -EINVAL; | |
4ba1d9c0 CL |
1048 | } else if (u.packet.header_length == 0 || |
1049 | u.packet.header_length % ctx->header_size != 0) { | |
295e3feb | 1050 | return -EINVAL; |
9b32d5f3 | 1051 | } |
295e3feb KH |
1052 | header_length = 0; |
1053 | } | |
1054 | ||
19a15b93 | 1055 | next = (struct fw_cdev_iso_packet __user *) |
295e3feb | 1056 | &p->header[header_length / 4]; |
19a15b93 KH |
1057 | if (next > end) |
1058 | return -EINVAL; | |
1059 | if (__copy_from_user | |
295e3feb | 1060 | (u.packet.header, p->header, header_length)) |
19a15b93 | 1061 | return -EFAULT; |
98b6cbe8 | 1062 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
1063 | u.packet.header_length + u.packet.payload_length > 0) |
1064 | return -EINVAL; | |
ef370ee7 | 1065 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
1066 | return -EINVAL; |
1067 | ||
9b32d5f3 KH |
1068 | if (fw_iso_context_queue(ctx, &u.packet, |
1069 | &client->buffer, payload)) | |
19a15b93 KH |
1070 | break; |
1071 | ||
1072 | p = next; | |
1073 | payload += u.packet.payload_length; | |
1074 | count++; | |
1075 | } | |
1076 | ||
6e95dea7 SR |
1077 | a->size -= uptr_to_u64(p) - a->packets; |
1078 | a->packets = uptr_to_u64(p); | |
1079 | a->data = client->vm_start + payload; | |
19a15b93 KH |
1080 | |
1081 | return count; | |
1082 | } | |
1083 | ||
6e95dea7 | 1084 | static int ioctl_start_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1085 | { |
6e95dea7 | 1086 | struct fw_cdev_start_iso *a = &arg->start_iso; |
19a15b93 | 1087 | |
eb5b35a5 SR |
1088 | BUILD_BUG_ON( |
1089 | FW_CDEV_ISO_CONTEXT_MATCH_TAG0 != FW_ISO_CONTEXT_MATCH_TAG0 || | |
1090 | FW_CDEV_ISO_CONTEXT_MATCH_TAG1 != FW_ISO_CONTEXT_MATCH_TAG1 || | |
1091 | FW_CDEV_ISO_CONTEXT_MATCH_TAG2 != FW_ISO_CONTEXT_MATCH_TAG2 || | |
1092 | FW_CDEV_ISO_CONTEXT_MATCH_TAG3 != FW_ISO_CONTEXT_MATCH_TAG3 || | |
1093 | FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS != FW_ISO_CONTEXT_MATCH_ALL_TAGS); | |
1094 | ||
6e95dea7 | 1095 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 | 1096 | return -EINVAL; |
fae60312 | 1097 | |
6e95dea7 SR |
1098 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE && |
1099 | (a->tags == 0 || a->tags > 15 || a->sync > 15)) | |
1100 | return -EINVAL; | |
eb0306ea | 1101 | |
6e95dea7 SR |
1102 | return fw_iso_context_start(client->iso_context, |
1103 | a->cycle, a->sync, a->tags); | |
19a15b93 KH |
1104 | } |
1105 | ||
6e95dea7 | 1106 | static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg) |
b8295668 | 1107 | { |
6e95dea7 | 1108 | struct fw_cdev_stop_iso *a = &arg->stop_iso; |
abaa5743 | 1109 | |
6e95dea7 | 1110 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 KH |
1111 | return -EINVAL; |
1112 | ||
b8295668 KH |
1113 | return fw_iso_context_stop(client->iso_context); |
1114 | } | |
1115 | ||
6e95dea7 | 1116 | static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg) |
a64408b9 | 1117 | { |
6e95dea7 | 1118 | struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2; |
a64408b9 | 1119 | struct fw_card *card = client->device->card; |
abfe5a01 | 1120 | struct timespec ts = {0, 0}; |
4a9bde9b | 1121 | u32 cycle_time; |
abfe5a01 | 1122 | int ret = 0; |
a64408b9 | 1123 | |
4a9bde9b | 1124 | local_irq_disable(); |
a64408b9 | 1125 | |
0fcff4e3 | 1126 | cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME); |
abfe5a01 | 1127 | |
6e95dea7 | 1128 | switch (a->clk_id) { |
abfe5a01 SR |
1129 | case CLOCK_REALTIME: getnstimeofday(&ts); break; |
1130 | case CLOCK_MONOTONIC: do_posix_clock_monotonic_gettime(&ts); break; | |
1131 | case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts); break; | |
1132 | default: | |
1133 | ret = -EINVAL; | |
1134 | } | |
a64408b9 | 1135 | |
4a9bde9b | 1136 | local_irq_enable(); |
a64408b9 | 1137 | |
6e95dea7 SR |
1138 | a->tv_sec = ts.tv_sec; |
1139 | a->tv_nsec = ts.tv_nsec; | |
1140 | a->cycle_timer = cycle_time; | |
abfe5a01 SR |
1141 | |
1142 | return ret; | |
1143 | } | |
1144 | ||
6e95dea7 | 1145 | static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg) |
abfe5a01 | 1146 | { |
6e95dea7 | 1147 | struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer; |
abfe5a01 SR |
1148 | struct fw_cdev_get_cycle_timer2 ct2; |
1149 | ||
1150 | ct2.clk_id = CLOCK_REALTIME; | |
6e95dea7 | 1151 | ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2); |
abfe5a01 | 1152 | |
6e95dea7 SR |
1153 | a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC; |
1154 | a->cycle_timer = ct2.cycle_timer; | |
4a9bde9b | 1155 | |
a64408b9 SR |
1156 | return 0; |
1157 | } | |
1158 | ||
b1bda4cd JFSR |
1159 | static void iso_resource_work(struct work_struct *work) |
1160 | { | |
1161 | struct iso_resource_event *e; | |
1162 | struct iso_resource *r = | |
1163 | container_of(work, struct iso_resource, work.work); | |
1164 | struct client *client = r->client; | |
1165 | int generation, channel, bandwidth, todo; | |
1166 | bool skip, free, success; | |
1167 | ||
1168 | spin_lock_irq(&client->lock); | |
1169 | generation = client->device->generation; | |
1170 | todo = r->todo; | |
1171 | /* Allow 1000ms grace period for other reallocations. */ | |
1172 | if (todo == ISO_RES_ALLOC && | |
1173 | time_is_after_jiffies(client->device->card->reset_jiffies + HZ)) { | |
9fb551bf | 1174 | schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3)); |
b1bda4cd JFSR |
1175 | skip = true; |
1176 | } else { | |
1177 | /* We could be called twice within the same generation. */ | |
1178 | skip = todo == ISO_RES_REALLOC && | |
1179 | r->generation == generation; | |
1180 | } | |
1ec3c026 SR |
1181 | free = todo == ISO_RES_DEALLOC || |
1182 | todo == ISO_RES_ALLOC_ONCE || | |
1183 | todo == ISO_RES_DEALLOC_ONCE; | |
b1bda4cd JFSR |
1184 | r->generation = generation; |
1185 | spin_unlock_irq(&client->lock); | |
1186 | ||
1187 | if (skip) | |
1188 | goto out; | |
1189 | ||
1190 | bandwidth = r->bandwidth; | |
1191 | ||
1192 | fw_iso_resource_manage(client->device->card, generation, | |
1193 | r->channels, &channel, &bandwidth, | |
1ec3c026 SR |
1194 | todo == ISO_RES_ALLOC || |
1195 | todo == ISO_RES_REALLOC || | |
6fdc0370 SR |
1196 | todo == ISO_RES_ALLOC_ONCE, |
1197 | r->transaction_data); | |
b1bda4cd JFSR |
1198 | /* |
1199 | * Is this generation outdated already? As long as this resource sticks | |
1200 | * in the idr, it will be scheduled again for a newer generation or at | |
1201 | * shutdown. | |
1202 | */ | |
1203 | if (channel == -EAGAIN && | |
1204 | (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC)) | |
1205 | goto out; | |
1206 | ||
1207 | success = channel >= 0 || bandwidth > 0; | |
1208 | ||
1209 | spin_lock_irq(&client->lock); | |
1210 | /* | |
1211 | * Transit from allocation to reallocation, except if the client | |
1212 | * requested deallocation in the meantime. | |
1213 | */ | |
1214 | if (r->todo == ISO_RES_ALLOC) | |
1215 | r->todo = ISO_RES_REALLOC; | |
1216 | /* | |
1217 | * Allocation or reallocation failure? Pull this resource out of the | |
1218 | * idr and prepare for deletion, unless the client is shutting down. | |
1219 | */ | |
1220 | if (r->todo == ISO_RES_REALLOC && !success && | |
1221 | !client->in_shutdown && | |
1222 | idr_find(&client->resource_idr, r->resource.handle)) { | |
1223 | idr_remove(&client->resource_idr, r->resource.handle); | |
1224 | client_put(client); | |
1225 | free = true; | |
1226 | } | |
1227 | spin_unlock_irq(&client->lock); | |
1228 | ||
1229 | if (todo == ISO_RES_ALLOC && channel >= 0) | |
5d9cb7d2 | 1230 | r->channels = 1ULL << channel; |
b1bda4cd JFSR |
1231 | |
1232 | if (todo == ISO_RES_REALLOC && success) | |
1233 | goto out; | |
1234 | ||
1ec3c026 | 1235 | if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) { |
b1bda4cd JFSR |
1236 | e = r->e_alloc; |
1237 | r->e_alloc = NULL; | |
1238 | } else { | |
1239 | e = r->e_dealloc; | |
1240 | r->e_dealloc = NULL; | |
1241 | } | |
e21fcf79 SR |
1242 | e->iso_resource.handle = r->resource.handle; |
1243 | e->iso_resource.channel = channel; | |
1244 | e->iso_resource.bandwidth = bandwidth; | |
b1bda4cd JFSR |
1245 | |
1246 | queue_event(client, &e->event, | |
e21fcf79 | 1247 | &e->iso_resource, sizeof(e->iso_resource), NULL, 0); |
b1bda4cd JFSR |
1248 | |
1249 | if (free) { | |
1250 | cancel_delayed_work(&r->work); | |
1251 | kfree(r->e_alloc); | |
1252 | kfree(r->e_dealloc); | |
1253 | kfree(r); | |
1254 | } | |
1255 | out: | |
1256 | client_put(client); | |
1257 | } | |
1258 | ||
b1bda4cd JFSR |
1259 | static void release_iso_resource(struct client *client, |
1260 | struct client_resource *resource) | |
1261 | { | |
1262 | struct iso_resource *r = | |
1263 | container_of(resource, struct iso_resource, resource); | |
1264 | ||
1265 | spin_lock_irq(&client->lock); | |
1266 | r->todo = ISO_RES_DEALLOC; | |
9fb551bf | 1267 | schedule_iso_resource(r, 0); |
b1bda4cd JFSR |
1268 | spin_unlock_irq(&client->lock); |
1269 | } | |
1270 | ||
1ec3c026 SR |
1271 | static int init_iso_resource(struct client *client, |
1272 | struct fw_cdev_allocate_iso_resource *request, int todo) | |
b1bda4cd | 1273 | { |
b1bda4cd JFSR |
1274 | struct iso_resource_event *e1, *e2; |
1275 | struct iso_resource *r; | |
1276 | int ret; | |
1277 | ||
1278 | if ((request->channels == 0 && request->bandwidth == 0) || | |
1279 | request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL || | |
1280 | request->bandwidth < 0) | |
1281 | return -EINVAL; | |
1282 | ||
1283 | r = kmalloc(sizeof(*r), GFP_KERNEL); | |
1284 | e1 = kmalloc(sizeof(*e1), GFP_KERNEL); | |
1285 | e2 = kmalloc(sizeof(*e2), GFP_KERNEL); | |
1286 | if (r == NULL || e1 == NULL || e2 == NULL) { | |
1287 | ret = -ENOMEM; | |
1288 | goto fail; | |
1289 | } | |
1290 | ||
1291 | INIT_DELAYED_WORK(&r->work, iso_resource_work); | |
1292 | r->client = client; | |
1ec3c026 | 1293 | r->todo = todo; |
b1bda4cd JFSR |
1294 | r->generation = -1; |
1295 | r->channels = request->channels; | |
1296 | r->bandwidth = request->bandwidth; | |
1297 | r->e_alloc = e1; | |
1298 | r->e_dealloc = e2; | |
1299 | ||
e21fcf79 SR |
1300 | e1->iso_resource.closure = request->closure; |
1301 | e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED; | |
1302 | e2->iso_resource.closure = request->closure; | |
1303 | e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED; | |
b1bda4cd | 1304 | |
1ec3c026 SR |
1305 | if (todo == ISO_RES_ALLOC) { |
1306 | r->resource.release = release_iso_resource; | |
1307 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
81610b8f SR |
1308 | if (ret < 0) |
1309 | goto fail; | |
1ec3c026 SR |
1310 | } else { |
1311 | r->resource.release = NULL; | |
1312 | r->resource.handle = -1; | |
9fb551bf | 1313 | schedule_iso_resource(r, 0); |
1ec3c026 | 1314 | } |
b1bda4cd JFSR |
1315 | request->handle = r->resource.handle; |
1316 | ||
1317 | return 0; | |
1318 | fail: | |
1319 | kfree(r); | |
1320 | kfree(e1); | |
1321 | kfree(e2); | |
1322 | ||
1323 | return ret; | |
1324 | } | |
1325 | ||
6e95dea7 SR |
1326 | static int ioctl_allocate_iso_resource(struct client *client, |
1327 | union ioctl_arg *arg) | |
1ec3c026 | 1328 | { |
6e95dea7 SR |
1329 | return init_iso_resource(client, |
1330 | &arg->allocate_iso_resource, ISO_RES_ALLOC); | |
1ec3c026 SR |
1331 | } |
1332 | ||
6e95dea7 SR |
1333 | static int ioctl_deallocate_iso_resource(struct client *client, |
1334 | union ioctl_arg *arg) | |
b1bda4cd | 1335 | { |
6e95dea7 SR |
1336 | return release_client_resource(client, |
1337 | arg->deallocate.handle, release_iso_resource, NULL); | |
b1bda4cd JFSR |
1338 | } |
1339 | ||
6e95dea7 SR |
1340 | static int ioctl_allocate_iso_resource_once(struct client *client, |
1341 | union ioctl_arg *arg) | |
1ec3c026 | 1342 | { |
6e95dea7 SR |
1343 | return init_iso_resource(client, |
1344 | &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE); | |
1ec3c026 SR |
1345 | } |
1346 | ||
6e95dea7 SR |
1347 | static int ioctl_deallocate_iso_resource_once(struct client *client, |
1348 | union ioctl_arg *arg) | |
1ec3c026 | 1349 | { |
6e95dea7 SR |
1350 | return init_iso_resource(client, |
1351 | &arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE); | |
1ec3c026 SR |
1352 | } |
1353 | ||
c8a25900 SR |
1354 | /* |
1355 | * Returns a speed code: Maximum speed to or from this device, | |
1356 | * limited by the device's link speed, the local node's link speed, | |
1357 | * and all PHY port speeds between the two links. | |
1358 | */ | |
6e95dea7 | 1359 | static int ioctl_get_speed(struct client *client, union ioctl_arg *arg) |
33580a3e | 1360 | { |
c8a25900 | 1361 | return client->device->max_speed; |
33580a3e SR |
1362 | } |
1363 | ||
6e95dea7 SR |
1364 | static int ioctl_send_broadcast_request(struct client *client, |
1365 | union ioctl_arg *arg) | |
acfe8333 | 1366 | { |
6e95dea7 | 1367 | struct fw_cdev_send_request *a = &arg->send_request; |
acfe8333 | 1368 | |
6e95dea7 | 1369 | switch (a->tcode) { |
acfe8333 JFSR |
1370 | case TCODE_WRITE_QUADLET_REQUEST: |
1371 | case TCODE_WRITE_BLOCK_REQUEST: | |
1372 | break; | |
1373 | default: | |
1374 | return -EINVAL; | |
1375 | } | |
1376 | ||
1566f3dc | 1377 | /* Security policy: Only allow accesses to Units Space. */ |
6e95dea7 | 1378 | if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END) |
1566f3dc SR |
1379 | return -EACCES; |
1380 | ||
6e95dea7 | 1381 | return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100); |
acfe8333 JFSR |
1382 | } |
1383 | ||
6e95dea7 | 1384 | static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg) |
f8c2287c | 1385 | { |
6e95dea7 | 1386 | struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet; |
18e9b10f SR |
1387 | struct fw_cdev_send_request request; |
1388 | int dest; | |
f8c2287c | 1389 | |
6e95dea7 SR |
1390 | if (a->speed > client->device->card->link_speed || |
1391 | a->length > 1024 << a->speed) | |
18e9b10f | 1392 | return -EIO; |
f8c2287c | 1393 | |
6e95dea7 | 1394 | if (a->tag > 3 || a->channel > 63 || a->sy > 15) |
18e9b10f SR |
1395 | return -EINVAL; |
1396 | ||
6e95dea7 | 1397 | dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy); |
18e9b10f | 1398 | request.tcode = TCODE_STREAM_DATA; |
6e95dea7 SR |
1399 | request.length = a->length; |
1400 | request.closure = a->closure; | |
1401 | request.data = a->data; | |
1402 | request.generation = a->generation; | |
18e9b10f | 1403 | |
6e95dea7 | 1404 | return init_request(client, &request, dest, a->speed); |
f8c2287c JF |
1405 | } |
1406 | ||
850bb6f2 SR |
1407 | static void outbound_phy_packet_callback(struct fw_packet *packet, |
1408 | struct fw_card *card, int status) | |
1409 | { | |
1410 | struct outbound_phy_packet_event *e = | |
1411 | container_of(packet, struct outbound_phy_packet_event, p); | |
1412 | ||
1413 | switch (status) { | |
1414 | /* expected: */ | |
1415 | case ACK_COMPLETE: e->phy_packet.rcode = RCODE_COMPLETE; break; | |
1416 | /* should never happen with PHY packets: */ | |
1417 | case ACK_PENDING: e->phy_packet.rcode = RCODE_COMPLETE; break; | |
1418 | case ACK_BUSY_X: | |
1419 | case ACK_BUSY_A: | |
1420 | case ACK_BUSY_B: e->phy_packet.rcode = RCODE_BUSY; break; | |
1421 | case ACK_DATA_ERROR: e->phy_packet.rcode = RCODE_DATA_ERROR; break; | |
1422 | case ACK_TYPE_ERROR: e->phy_packet.rcode = RCODE_TYPE_ERROR; break; | |
1423 | /* stale generation; cancelled; on certain controllers: no ack */ | |
1424 | default: e->phy_packet.rcode = status; break; | |
1425 | } | |
1426 | ||
1427 | queue_event(e->client, &e->event, | |
1428 | &e->phy_packet, sizeof(e->phy_packet), NULL, 0); | |
1429 | client_put(e->client); | |
1430 | } | |
1431 | ||
1432 | static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg) | |
1433 | { | |
1434 | struct fw_cdev_send_phy_packet *a = &arg->send_phy_packet; | |
1435 | struct fw_card *card = client->device->card; | |
1436 | struct outbound_phy_packet_event *e; | |
1437 | ||
1438 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1439 | if (!client->device->is_local) | |
1440 | return -ENOSYS; | |
1441 | ||
1442 | e = kzalloc(sizeof(*e), GFP_KERNEL); | |
1443 | if (e == NULL) | |
1444 | return -ENOMEM; | |
1445 | ||
1446 | client_get(client); | |
1447 | e->client = client; | |
1448 | e->p.speed = SCODE_100; | |
1449 | e->p.generation = a->generation; | |
1450 | e->p.header[0] = a->data[0]; | |
1451 | e->p.header[1] = a->data[1]; | |
1452 | e->p.header_length = 8; | |
1453 | e->p.callback = outbound_phy_packet_callback; | |
1454 | e->phy_packet.closure = a->closure; | |
1455 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_SENT; | |
1456 | ||
1457 | card->driver->send_request(card, &e->p); | |
1458 | ||
1459 | return 0; | |
1460 | } | |
1461 | ||
bf54e146 SR |
1462 | static int ioctl_receive_phy_packets(struct client *client, union ioctl_arg *arg) |
1463 | { | |
1464 | struct fw_cdev_receive_phy_packets *a = &arg->receive_phy_packets; | |
1465 | struct fw_card *card = client->device->card; | |
1466 | ||
1467 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1468 | if (!client->device->is_local) | |
1469 | return -ENOSYS; | |
1470 | ||
1471 | spin_lock_irq(&card->lock); | |
1472 | ||
1473 | list_move_tail(&client->phy_receiver_link, &card->phy_receiver_list); | |
1474 | client->phy_receiver_closure = a->closure; | |
1475 | ||
1476 | spin_unlock_irq(&card->lock); | |
1477 | ||
1478 | return 0; | |
1479 | } | |
1480 | ||
1481 | void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p) | |
1482 | { | |
1483 | struct client *client; | |
1484 | struct inbound_phy_packet_event *e; | |
1485 | unsigned long flags; | |
1486 | ||
1487 | spin_lock_irqsave(&card->lock, flags); | |
1488 | ||
1489 | list_for_each_entry(client, &card->phy_receiver_list, phy_receiver_link) { | |
1490 | e = kmalloc(sizeof(*e) + 8, GFP_ATOMIC); | |
1491 | if (e == NULL) { | |
1492 | fw_notify("Out of memory when allocating event\n"); | |
1493 | break; | |
1494 | } | |
1495 | e->phy_packet.closure = client->phy_receiver_closure; | |
1496 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_RECEIVED; | |
1497 | e->phy_packet.rcode = RCODE_COMPLETE; | |
1498 | e->phy_packet.length = 8; | |
1499 | e->phy_packet.data[0] = p->header[1]; | |
1500 | e->phy_packet.data[1] = p->header[2]; | |
1501 | queue_event(client, &e->event, | |
1502 | &e->phy_packet, sizeof(e->phy_packet) + 8, NULL, 0); | |
1503 | } | |
1504 | ||
1505 | spin_unlock_irqrestore(&card->lock, flags); | |
1506 | } | |
1507 | ||
6e95dea7 | 1508 | static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = { |
b9dc61cf SR |
1509 | [0x00] = ioctl_get_info, |
1510 | [0x01] = ioctl_send_request, | |
1511 | [0x02] = ioctl_allocate, | |
1512 | [0x03] = ioctl_deallocate, | |
1513 | [0x04] = ioctl_send_response, | |
1514 | [0x05] = ioctl_initiate_bus_reset, | |
1515 | [0x06] = ioctl_add_descriptor, | |
1516 | [0x07] = ioctl_remove_descriptor, | |
1517 | [0x08] = ioctl_create_iso_context, | |
1518 | [0x09] = ioctl_queue_iso, | |
1519 | [0x0a] = ioctl_start_iso, | |
1520 | [0x0b] = ioctl_stop_iso, | |
1521 | [0x0c] = ioctl_get_cycle_timer, | |
1522 | [0x0d] = ioctl_allocate_iso_resource, | |
1523 | [0x0e] = ioctl_deallocate_iso_resource, | |
1524 | [0x0f] = ioctl_allocate_iso_resource_once, | |
1525 | [0x10] = ioctl_deallocate_iso_resource_once, | |
1526 | [0x11] = ioctl_get_speed, | |
1527 | [0x12] = ioctl_send_broadcast_request, | |
1528 | [0x13] = ioctl_send_stream_packet, | |
1529 | [0x14] = ioctl_get_cycle_timer2, | |
850bb6f2 | 1530 | [0x15] = ioctl_send_phy_packet, |
bf54e146 | 1531 | [0x16] = ioctl_receive_phy_packets, |
4f259223 KH |
1532 | }; |
1533 | ||
53dca511 SR |
1534 | static int dispatch_ioctl(struct client *client, |
1535 | unsigned int cmd, void __user *arg) | |
19a15b93 | 1536 | { |
6e95dea7 | 1537 | union ioctl_arg buffer; |
2dbd7d7e | 1538 | int ret; |
4f259223 | 1539 | |
64582298 SR |
1540 | if (fw_device_is_shutdown(client->device)) |
1541 | return -ENODEV; | |
1542 | ||
4f259223 | 1543 | if (_IOC_TYPE(cmd) != '#' || |
9cac00b8 SR |
1544 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) || |
1545 | _IOC_SIZE(cmd) > sizeof(buffer)) | |
19a15b93 | 1546 | return -EINVAL; |
4f259223 | 1547 | |
9cac00b8 SR |
1548 | if (_IOC_DIR(cmd) == _IOC_READ) |
1549 | memset(&buffer, 0, _IOC_SIZE(cmd)); | |
1550 | ||
1551 | if (_IOC_DIR(cmd) & _IOC_WRITE) | |
1552 | if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd))) | |
4f259223 | 1553 | return -EFAULT; |
4f259223 | 1554 | |
6e95dea7 | 1555 | ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer); |
2dbd7d7e SR |
1556 | if (ret < 0) |
1557 | return ret; | |
4f259223 | 1558 | |
9cac00b8 SR |
1559 | if (_IOC_DIR(cmd) & _IOC_READ) |
1560 | if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd))) | |
4f259223 | 1561 | return -EFAULT; |
4f259223 | 1562 | |
2dbd7d7e | 1563 | return ret; |
19a15b93 KH |
1564 | } |
1565 | ||
53dca511 SR |
1566 | static long fw_device_op_ioctl(struct file *file, |
1567 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1568 | { |
64582298 | 1569 | return dispatch_ioctl(file->private_data, cmd, (void __user *)arg); |
19a15b93 KH |
1570 | } |
1571 | ||
1572 | #ifdef CONFIG_COMPAT | |
53dca511 SR |
1573 | static long fw_device_op_compat_ioctl(struct file *file, |
1574 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1575 | { |
64582298 | 1576 | return dispatch_ioctl(file->private_data, cmd, compat_ptr(arg)); |
19a15b93 KH |
1577 | } |
1578 | #endif | |
1579 | ||
1580 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
1581 | { | |
1582 | struct client *client = file->private_data; | |
9aad8125 KH |
1583 | enum dma_data_direction direction; |
1584 | unsigned long size; | |
2dbd7d7e | 1585 | int page_count, ret; |
9aad8125 | 1586 | |
551f4cb9 JF |
1587 | if (fw_device_is_shutdown(client->device)) |
1588 | return -ENODEV; | |
1589 | ||
9aad8125 KH |
1590 | /* FIXME: We could support multiple buffers, but we don't. */ |
1591 | if (client->buffer.pages != NULL) | |
1592 | return -EBUSY; | |
1593 | ||
1594 | if (!(vma->vm_flags & VM_SHARED)) | |
1595 | return -EINVAL; | |
19a15b93 | 1596 | |
9aad8125 | 1597 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
1598 | return -EINVAL; |
1599 | ||
1600 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
1601 | size = vma->vm_end - vma->vm_start; |
1602 | page_count = size >> PAGE_SHIFT; | |
1603 | if (size & ~PAGE_MASK) | |
1604 | return -EINVAL; | |
1605 | ||
1606 | if (vma->vm_flags & VM_WRITE) | |
1607 | direction = DMA_TO_DEVICE; | |
1608 | else | |
1609 | direction = DMA_FROM_DEVICE; | |
1610 | ||
2dbd7d7e SR |
1611 | ret = fw_iso_buffer_init(&client->buffer, client->device->card, |
1612 | page_count, direction); | |
1613 | if (ret < 0) | |
1614 | return ret; | |
19a15b93 | 1615 | |
2dbd7d7e SR |
1616 | ret = fw_iso_buffer_map(&client->buffer, vma); |
1617 | if (ret < 0) | |
9aad8125 KH |
1618 | fw_iso_buffer_destroy(&client->buffer, client->device->card); |
1619 | ||
2dbd7d7e | 1620 | return ret; |
19a15b93 KH |
1621 | } |
1622 | ||
45ee3199 JF |
1623 | static int shutdown_resource(int id, void *p, void *data) |
1624 | { | |
e21fcf79 | 1625 | struct client_resource *resource = p; |
45ee3199 JF |
1626 | struct client *client = data; |
1627 | ||
e21fcf79 | 1628 | resource->release(client, resource); |
fb443036 | 1629 | client_put(client); |
45ee3199 JF |
1630 | |
1631 | return 0; | |
1632 | } | |
1633 | ||
19a15b93 KH |
1634 | static int fw_device_op_release(struct inode *inode, struct file *file) |
1635 | { | |
1636 | struct client *client = file->private_data; | |
e21fcf79 | 1637 | struct event *event, *next_event; |
19a15b93 | 1638 | |
bf54e146 SR |
1639 | spin_lock_irq(&client->device->card->lock); |
1640 | list_del(&client->phy_receiver_link); | |
1641 | spin_unlock_irq(&client->device->card->lock); | |
1642 | ||
97811e34 SR |
1643 | mutex_lock(&client->device->client_list_mutex); |
1644 | list_del(&client->link); | |
1645 | mutex_unlock(&client->device->client_list_mutex); | |
1646 | ||
19a15b93 KH |
1647 | if (client->iso_context) |
1648 | fw_iso_context_destroy(client->iso_context); | |
1649 | ||
36a755cf SR |
1650 | if (client->buffer.pages) |
1651 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
1652 | ||
45ee3199 | 1653 | /* Freeze client->resource_idr and client->event_list */ |
3ba94986 | 1654 | spin_lock_irq(&client->lock); |
45ee3199 | 1655 | client->in_shutdown = true; |
3ba94986 | 1656 | spin_unlock_irq(&client->lock); |
66dea3e5 | 1657 | |
45ee3199 JF |
1658 | idr_for_each(&client->resource_idr, shutdown_resource, client); |
1659 | idr_remove_all(&client->resource_idr); | |
1660 | idr_destroy(&client->resource_idr); | |
28cf6a04 | 1661 | |
e21fcf79 SR |
1662 | list_for_each_entry_safe(event, next_event, &client->event_list, link) |
1663 | kfree(event); | |
19a15b93 | 1664 | |
fb443036 | 1665 | client_put(client); |
19a15b93 KH |
1666 | |
1667 | return 0; | |
1668 | } | |
1669 | ||
1670 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
1671 | { | |
1672 | struct client *client = file->private_data; | |
2603bf21 | 1673 | unsigned int mask = 0; |
19a15b93 KH |
1674 | |
1675 | poll_wait(file, &client->wait, pt); | |
1676 | ||
2603bf21 KH |
1677 | if (fw_device_is_shutdown(client->device)) |
1678 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 1679 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
1680 | mask |= POLLIN | POLLRDNORM; |
1681 | ||
1682 | return mask; | |
19a15b93 KH |
1683 | } |
1684 | ||
21ebcd12 | 1685 | const struct file_operations fw_device_ops = { |
19a15b93 | 1686 | .owner = THIS_MODULE, |
3ac26b2e | 1687 | .llseek = no_llseek, |
19a15b93 KH |
1688 | .open = fw_device_op_open, |
1689 | .read = fw_device_op_read, | |
1690 | .unlocked_ioctl = fw_device_op_ioctl, | |
19a15b93 | 1691 | .mmap = fw_device_op_mmap, |
3ac26b2e SR |
1692 | .release = fw_device_op_release, |
1693 | .poll = fw_device_op_poll, | |
19a15b93 | 1694 | #ifdef CONFIG_COMPAT |
5af4e5ea | 1695 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
1696 | #endif |
1697 | }; |