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> | |
0b6c4857 | 25 | #include <linux/dma-mapping.h> |
be5bbd67 | 26 | #include <linux/errno.h> |
77c9a5da | 27 | #include <linux/firewire.h> |
be5bbd67 SR |
28 | #include <linux/firewire-cdev.h> |
29 | #include <linux/idr.h> | |
4a9bde9b | 30 | #include <linux/irqflags.h> |
b1bda4cd | 31 | #include <linux/jiffies.h> |
19a15b93 | 32 | #include <linux/kernel.h> |
fb443036 | 33 | #include <linux/kref.h> |
be5bbd67 SR |
34 | #include <linux/mm.h> |
35 | #include <linux/module.h> | |
d67cfb96 | 36 | #include <linux/mutex.h> |
19a15b93 | 37 | #include <linux/poll.h> |
ae2a9766 | 38 | #include <linux/sched.h> /* required for linux/wait.h */ |
5a0e3ad6 | 39 | #include <linux/slab.h> |
cf417e54 | 40 | #include <linux/spinlock.h> |
281e2032 | 41 | #include <linux/string.h> |
be5bbd67 | 42 | #include <linux/time.h> |
e034d242 | 43 | #include <linux/uaccess.h> |
be5bbd67 SR |
44 | #include <linux/vmalloc.h> |
45 | #include <linux/wait.h> | |
b1bda4cd | 46 | #include <linux/workqueue.h> |
be5bbd67 | 47 | |
be5bbd67 | 48 | |
77c9a5da | 49 | #include "core.h" |
19a15b93 | 50 | |
604f4516 SR |
51 | /* |
52 | * ABI version history is documented in linux/firewire-cdev.h. | |
53 | */ | |
18d62711 | 54 | #define FW_CDEV_KERNEL_VERSION 5 |
8e2b2b46 SR |
55 | #define FW_CDEV_VERSION_EVENT_REQUEST2 4 |
56 | #define FW_CDEV_VERSION_ALLOCATE_REGION_END 4 | |
604f4516 | 57 | |
19a15b93 | 58 | struct client { |
344bbc4d | 59 | u32 version; |
19a15b93 | 60 | struct fw_device *device; |
45ee3199 | 61 | |
19a15b93 | 62 | spinlock_t lock; |
45ee3199 JF |
63 | bool in_shutdown; |
64 | struct idr resource_idr; | |
19a15b93 | 65 | struct list_head event_list; |
19a15b93 | 66 | wait_queue_head_t wait; |
5a5e62da | 67 | wait_queue_head_t tx_flush_wait; |
da8ecffa | 68 | u64 bus_reset_closure; |
9aad8125 | 69 | |
19a15b93 | 70 | struct fw_iso_context *iso_context; |
abaa5743 | 71 | u64 iso_closure; |
9aad8125 KH |
72 | struct fw_iso_buffer buffer; |
73 | unsigned long vm_start; | |
0b6c4857 | 74 | bool buffer_is_mapped; |
97bd9efa | 75 | |
bf54e146 SR |
76 | struct list_head phy_receiver_link; |
77 | u64 phy_receiver_closure; | |
78 | ||
97bd9efa | 79 | struct list_head link; |
fb443036 | 80 | struct kref kref; |
19a15b93 KH |
81 | }; |
82 | ||
fb443036 SR |
83 | static inline void client_get(struct client *client) |
84 | { | |
85 | kref_get(&client->kref); | |
86 | } | |
87 | ||
88 | static void client_release(struct kref *kref) | |
89 | { | |
90 | struct client *client = container_of(kref, struct client, kref); | |
91 | ||
92 | fw_device_put(client->device); | |
93 | kfree(client); | |
94 | } | |
95 | ||
96 | static void client_put(struct client *client) | |
97 | { | |
98 | kref_put(&client->kref, client_release); | |
99 | } | |
100 | ||
97c18b7f SR |
101 | struct client_resource; |
102 | typedef void (*client_resource_release_fn_t)(struct client *, | |
103 | struct client_resource *); | |
104 | struct client_resource { | |
105 | client_resource_release_fn_t release; | |
106 | int handle; | |
107 | }; | |
108 | ||
109 | struct address_handler_resource { | |
110 | struct client_resource resource; | |
111 | struct fw_address_handler handler; | |
112 | __u64 closure; | |
113 | struct client *client; | |
114 | }; | |
115 | ||
116 | struct outbound_transaction_resource { | |
117 | struct client_resource resource; | |
118 | struct fw_transaction transaction; | |
119 | }; | |
120 | ||
121 | struct inbound_transaction_resource { | |
122 | struct client_resource resource; | |
08bd34c9 | 123 | struct fw_card *card; |
97c18b7f SR |
124 | struct fw_request *request; |
125 | void *data; | |
126 | size_t length; | |
127 | }; | |
128 | ||
129 | struct descriptor_resource { | |
130 | struct client_resource resource; | |
131 | struct fw_descriptor descriptor; | |
132 | u32 data[0]; | |
133 | }; | |
134 | ||
b1bda4cd JFSR |
135 | struct iso_resource { |
136 | struct client_resource resource; | |
137 | struct client *client; | |
138 | /* Schedule work and access todo only with client->lock held. */ | |
139 | struct delayed_work work; | |
1ec3c026 SR |
140 | enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC, |
141 | ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo; | |
b1bda4cd JFSR |
142 | int generation; |
143 | u64 channels; | |
144 | s32 bandwidth; | |
145 | struct iso_resource_event *e_alloc, *e_dealloc; | |
146 | }; | |
147 | ||
b1bda4cd JFSR |
148 | static void release_iso_resource(struct client *, struct client_resource *); |
149 | ||
9fb551bf SR |
150 | static void schedule_iso_resource(struct iso_resource *r, unsigned long delay) |
151 | { | |
152 | client_get(r->client); | |
105e53f8 | 153 | if (!queue_delayed_work(fw_workqueue, &r->work, delay)) |
9fb551bf SR |
154 | client_put(r->client); |
155 | } | |
156 | ||
157 | static void schedule_if_iso_resource(struct client_resource *resource) | |
158 | { | |
159 | if (resource->release == release_iso_resource) | |
160 | schedule_iso_resource(container_of(resource, | |
161 | struct iso_resource, resource), 0); | |
162 | } | |
163 | ||
97c18b7f SR |
164 | /* |
165 | * dequeue_event() just kfree()'s the event, so the event has to be | |
166 | * the first field in a struct XYZ_event. | |
167 | */ | |
168 | struct event { | |
169 | struct { void *data; size_t size; } v[2]; | |
170 | struct list_head link; | |
171 | }; | |
172 | ||
173 | struct bus_reset_event { | |
174 | struct event event; | |
175 | struct fw_cdev_event_bus_reset reset; | |
176 | }; | |
177 | ||
178 | struct outbound_transaction_event { | |
179 | struct event event; | |
180 | struct client *client; | |
181 | struct outbound_transaction_resource r; | |
182 | struct fw_cdev_event_response response; | |
183 | }; | |
184 | ||
185 | struct inbound_transaction_event { | |
186 | struct event event; | |
e205597d SR |
187 | union { |
188 | struct fw_cdev_event_request request; | |
189 | struct fw_cdev_event_request2 request2; | |
190 | } req; | |
97c18b7f SR |
191 | }; |
192 | ||
193 | struct iso_interrupt_event { | |
194 | struct event event; | |
195 | struct fw_cdev_event_iso_interrupt interrupt; | |
196 | }; | |
197 | ||
872e330e SR |
198 | struct iso_interrupt_mc_event { |
199 | struct event event; | |
200 | struct fw_cdev_event_iso_interrupt_mc interrupt; | |
201 | }; | |
202 | ||
b1bda4cd JFSR |
203 | struct iso_resource_event { |
204 | struct event event; | |
e21fcf79 | 205 | struct fw_cdev_event_iso_resource iso_resource; |
b1bda4cd JFSR |
206 | }; |
207 | ||
850bb6f2 SR |
208 | struct outbound_phy_packet_event { |
209 | struct event event; | |
210 | struct client *client; | |
211 | struct fw_packet p; | |
212 | struct fw_cdev_event_phy_packet phy_packet; | |
213 | }; | |
214 | ||
bf54e146 SR |
215 | struct inbound_phy_packet_event { |
216 | struct event event; | |
217 | struct fw_cdev_event_phy_packet phy_packet; | |
218 | }; | |
219 | ||
9c1176b6 SR |
220 | #ifdef CONFIG_COMPAT |
221 | static void __user *u64_to_uptr(u64 value) | |
222 | { | |
223 | if (is_compat_task()) | |
224 | return compat_ptr(value); | |
225 | else | |
226 | return (void __user *)(unsigned long)value; | |
227 | } | |
228 | ||
229 | static u64 uptr_to_u64(void __user *ptr) | |
230 | { | |
231 | if (is_compat_task()) | |
232 | return ptr_to_compat(ptr); | |
233 | else | |
234 | return (u64)(unsigned long)ptr; | |
235 | } | |
236 | #else | |
237 | static inline void __user *u64_to_uptr(u64 value) | |
19a15b93 KH |
238 | { |
239 | return (void __user *)(unsigned long)value; | |
240 | } | |
241 | ||
9c1176b6 | 242 | static inline u64 uptr_to_u64(void __user *ptr) |
19a15b93 | 243 | { |
9c1176b6 | 244 | return (u64)(unsigned long)ptr; |
19a15b93 | 245 | } |
9c1176b6 | 246 | #endif /* CONFIG_COMPAT */ |
19a15b93 KH |
247 | |
248 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
249 | { | |
250 | struct fw_device *device; | |
251 | struct client *client; | |
252 | ||
96b19062 | 253 | device = fw_device_get_by_devt(inode->i_rdev); |
a3aca3da KH |
254 | if (device == NULL) |
255 | return -ENODEV; | |
19a15b93 | 256 | |
551f4cb9 JF |
257 | if (fw_device_is_shutdown(device)) { |
258 | fw_device_put(device); | |
259 | return -ENODEV; | |
260 | } | |
261 | ||
2d826cc5 | 262 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
96b19062 SR |
263 | if (client == NULL) { |
264 | fw_device_put(device); | |
19a15b93 | 265 | return -ENOMEM; |
96b19062 | 266 | } |
19a15b93 | 267 | |
96b19062 | 268 | client->device = device; |
19a15b93 | 269 | spin_lock_init(&client->lock); |
45ee3199 JF |
270 | idr_init(&client->resource_idr); |
271 | INIT_LIST_HEAD(&client->event_list); | |
19a15b93 | 272 | init_waitqueue_head(&client->wait); |
5a5e62da | 273 | init_waitqueue_head(&client->tx_flush_wait); |
bf54e146 | 274 | INIT_LIST_HEAD(&client->phy_receiver_link); |
93b37905 | 275 | INIT_LIST_HEAD(&client->link); |
fb443036 | 276 | kref_init(&client->kref); |
19a15b93 KH |
277 | |
278 | file->private_data = client; | |
279 | ||
3ac26b2e | 280 | return nonseekable_open(inode, file); |
19a15b93 KH |
281 | } |
282 | ||
283 | static void queue_event(struct client *client, struct event *event, | |
284 | void *data0, size_t size0, void *data1, size_t size1) | |
285 | { | |
286 | unsigned long flags; | |
287 | ||
288 | event->v[0].data = data0; | |
289 | event->v[0].size = size0; | |
290 | event->v[1].data = data1; | |
291 | event->v[1].size = size1; | |
292 | ||
293 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
294 | if (client->in_shutdown) |
295 | kfree(event); | |
296 | else | |
297 | list_add_tail(&event->link, &client->event_list); | |
19a15b93 | 298 | spin_unlock_irqrestore(&client->lock, flags); |
83431cba JF |
299 | |
300 | wake_up_interruptible(&client->wait); | |
19a15b93 KH |
301 | } |
302 | ||
53dca511 SR |
303 | static int dequeue_event(struct client *client, |
304 | char __user *buffer, size_t count) | |
19a15b93 | 305 | { |
19a15b93 KH |
306 | struct event *event; |
307 | size_t size, total; | |
2dbd7d7e | 308 | int i, ret; |
19a15b93 | 309 | |
2dbd7d7e SR |
310 | ret = wait_event_interruptible(client->wait, |
311 | !list_empty(&client->event_list) || | |
312 | fw_device_is_shutdown(client->device)); | |
313 | if (ret < 0) | |
314 | return ret; | |
19a15b93 | 315 | |
2603bf21 KH |
316 | if (list_empty(&client->event_list) && |
317 | fw_device_is_shutdown(client->device)) | |
318 | return -ENODEV; | |
19a15b93 | 319 | |
3ba94986 | 320 | spin_lock_irq(&client->lock); |
a459b8ab | 321 | event = list_first_entry(&client->event_list, struct event, link); |
19a15b93 | 322 | list_del(&event->link); |
3ba94986 | 323 | spin_unlock_irq(&client->lock); |
19a15b93 | 324 | |
19a15b93 KH |
325 | total = 0; |
326 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
327 | size = min(event->v[i].size, count - total); | |
2603bf21 | 328 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
2dbd7d7e | 329 | ret = -EFAULT; |
19a15b93 | 330 | goto out; |
2603bf21 | 331 | } |
19a15b93 KH |
332 | total += size; |
333 | } | |
2dbd7d7e | 334 | ret = total; |
19a15b93 KH |
335 | |
336 | out: | |
337 | kfree(event); | |
338 | ||
2dbd7d7e | 339 | return ret; |
19a15b93 KH |
340 | } |
341 | ||
53dca511 SR |
342 | static ssize_t fw_device_op_read(struct file *file, char __user *buffer, |
343 | size_t count, loff_t *offset) | |
19a15b93 KH |
344 | { |
345 | struct client *client = file->private_data; | |
346 | ||
347 | return dequeue_event(client, buffer, count); | |
348 | } | |
349 | ||
53dca511 SR |
350 | static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, |
351 | struct client *client) | |
344bbc4d | 352 | { |
da8ecffa | 353 | struct fw_card *card = client->device->card; |
cf417e54 | 354 | |
3ba94986 | 355 | spin_lock_irq(&card->lock); |
344bbc4d | 356 | |
da8ecffa | 357 | event->closure = client->bus_reset_closure; |
344bbc4d | 358 | event->type = FW_CDEV_EVENT_BUS_RESET; |
cf5a56ac | 359 | event->generation = client->device->generation; |
da8ecffa | 360 | event->node_id = client->device->node_id; |
344bbc4d | 361 | event->local_node_id = card->local_node->node_id; |
250b2b6d | 362 | event->bm_node_id = card->bm_node_id; |
344bbc4d KH |
363 | event->irm_node_id = card->irm_node->node_id; |
364 | event->root_node_id = card->root_node->node_id; | |
cf417e54 | 365 | |
3ba94986 | 366 | spin_unlock_irq(&card->lock); |
344bbc4d KH |
367 | } |
368 | ||
53dca511 SR |
369 | static void for_each_client(struct fw_device *device, |
370 | void (*callback)(struct client *client)) | |
2603bf21 | 371 | { |
2603bf21 | 372 | struct client *c; |
2603bf21 | 373 | |
d67cfb96 | 374 | mutex_lock(&device->client_list_mutex); |
2603bf21 KH |
375 | list_for_each_entry(c, &device->client_list, link) |
376 | callback(c); | |
d67cfb96 | 377 | mutex_unlock(&device->client_list_mutex); |
2603bf21 KH |
378 | } |
379 | ||
b1bda4cd JFSR |
380 | static int schedule_reallocations(int id, void *p, void *data) |
381 | { | |
9fb551bf | 382 | schedule_if_iso_resource(p); |
b1bda4cd | 383 | |
b1bda4cd JFSR |
384 | return 0; |
385 | } | |
386 | ||
53dca511 | 387 | static void queue_bus_reset_event(struct client *client) |
97bd9efa | 388 | { |
97c18b7f | 389 | struct bus_reset_event *e; |
97bd9efa | 390 | |
97c18b7f | 391 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
cfb0c9d1 | 392 | if (e == NULL) |
97bd9efa | 393 | return; |
97bd9efa | 394 | |
97c18b7f | 395 | fill_bus_reset_event(&e->reset, client); |
97bd9efa | 396 | |
97c18b7f SR |
397 | queue_event(client, &e->event, |
398 | &e->reset, sizeof(e->reset), NULL, 0); | |
b1bda4cd JFSR |
399 | |
400 | spin_lock_irq(&client->lock); | |
401 | idr_for_each(&client->resource_idr, schedule_reallocations, client); | |
402 | spin_unlock_irq(&client->lock); | |
97bd9efa KH |
403 | } |
404 | ||
405 | void fw_device_cdev_update(struct fw_device *device) | |
406 | { | |
2603bf21 KH |
407 | for_each_client(device, queue_bus_reset_event); |
408 | } | |
97bd9efa | 409 | |
2603bf21 KH |
410 | static void wake_up_client(struct client *client) |
411 | { | |
412 | wake_up_interruptible(&client->wait); | |
413 | } | |
97bd9efa | 414 | |
2603bf21 KH |
415 | void fw_device_cdev_remove(struct fw_device *device) |
416 | { | |
417 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
418 | } |
419 | ||
6e95dea7 SR |
420 | union ioctl_arg { |
421 | struct fw_cdev_get_info get_info; | |
422 | struct fw_cdev_send_request send_request; | |
423 | struct fw_cdev_allocate allocate; | |
424 | struct fw_cdev_deallocate deallocate; | |
425 | struct fw_cdev_send_response send_response; | |
426 | struct fw_cdev_initiate_bus_reset initiate_bus_reset; | |
427 | struct fw_cdev_add_descriptor add_descriptor; | |
428 | struct fw_cdev_remove_descriptor remove_descriptor; | |
429 | struct fw_cdev_create_iso_context create_iso_context; | |
430 | struct fw_cdev_queue_iso queue_iso; | |
431 | struct fw_cdev_start_iso start_iso; | |
432 | struct fw_cdev_stop_iso stop_iso; | |
433 | struct fw_cdev_get_cycle_timer get_cycle_timer; | |
434 | struct fw_cdev_allocate_iso_resource allocate_iso_resource; | |
435 | struct fw_cdev_send_stream_packet send_stream_packet; | |
436 | struct fw_cdev_get_cycle_timer2 get_cycle_timer2; | |
850bb6f2 | 437 | struct fw_cdev_send_phy_packet send_phy_packet; |
bf54e146 | 438 | struct fw_cdev_receive_phy_packets receive_phy_packets; |
872e330e | 439 | struct fw_cdev_set_iso_channels set_iso_channels; |
d1bbd209 | 440 | struct fw_cdev_flush_iso flush_iso; |
6e95dea7 SR |
441 | }; |
442 | ||
443 | static int ioctl_get_info(struct client *client, union ioctl_arg *arg) | |
19a15b93 | 444 | { |
6e95dea7 | 445 | struct fw_cdev_get_info *a = &arg->get_info; |
344bbc4d | 446 | struct fw_cdev_event_bus_reset bus_reset; |
c9755e14 | 447 | unsigned long ret = 0; |
344bbc4d | 448 | |
6e95dea7 | 449 | client->version = a->version; |
604f4516 | 450 | a->version = FW_CDEV_KERNEL_VERSION; |
6e95dea7 | 451 | a->card = client->device->card->index; |
344bbc4d | 452 | |
c9755e14 SR |
453 | down_read(&fw_device_rwsem); |
454 | ||
6e95dea7 SR |
455 | if (a->rom != 0) { |
456 | size_t want = a->rom_length; | |
d84702a5 | 457 | size_t have = client->device->config_rom_length * 4; |
344bbc4d | 458 | |
6e95dea7 SR |
459 | ret = copy_to_user(u64_to_uptr(a->rom), |
460 | client->device->config_rom, min(want, have)); | |
344bbc4d | 461 | } |
6e95dea7 | 462 | a->rom_length = client->device->config_rom_length * 4; |
344bbc4d | 463 | |
c9755e14 SR |
464 | up_read(&fw_device_rwsem); |
465 | ||
466 | if (ret != 0) | |
467 | return -EFAULT; | |
468 | ||
93b37905 SR |
469 | mutex_lock(&client->device->client_list_mutex); |
470 | ||
6e95dea7 SR |
471 | client->bus_reset_closure = a->bus_reset_closure; |
472 | if (a->bus_reset != 0) { | |
da8ecffa | 473 | fill_bus_reset_event(&bus_reset, client); |
790198f7 SR |
474 | /* unaligned size of bus_reset is 36 bytes */ |
475 | ret = copy_to_user(u64_to_uptr(a->bus_reset), &bus_reset, 36); | |
344bbc4d | 476 | } |
93b37905 SR |
477 | if (ret == 0 && list_empty(&client->link)) |
478 | list_add_tail(&client->link, &client->device->client_list); | |
19a15b93 | 479 | |
93b37905 SR |
480 | mutex_unlock(&client->device->client_list_mutex); |
481 | ||
482 | return ret ? -EFAULT : 0; | |
19a15b93 KH |
483 | } |
484 | ||
53dca511 SR |
485 | static int add_client_resource(struct client *client, |
486 | struct client_resource *resource, gfp_t gfp_mask) | |
3964a449 | 487 | { |
37b61890 | 488 | bool preload = gfp_mask & __GFP_WAIT; |
3964a449 | 489 | unsigned long flags; |
45ee3199 JF |
490 | int ret; |
491 | ||
37b61890 TH |
492 | if (preload) |
493 | idr_preload(gfp_mask); | |
3964a449 | 494 | spin_lock_irqsave(&client->lock, flags); |
37b61890 | 495 | |
45ee3199 JF |
496 | if (client->in_shutdown) |
497 | ret = -ECANCELED; | |
498 | else | |
37b61890 TH |
499 | ret = idr_alloc(&client->resource_idr, resource, 0, 0, |
500 | GFP_NOWAIT); | |
b1bda4cd | 501 | if (ret >= 0) { |
37b61890 | 502 | resource->handle = ret; |
fb443036 | 503 | client_get(client); |
9fb551bf | 504 | schedule_if_iso_resource(resource); |
b1bda4cd | 505 | } |
45ee3199 | 506 | |
37b61890 TH |
507 | spin_unlock_irqrestore(&client->lock, flags); |
508 | if (preload) | |
509 | idr_preload_end(); | |
45ee3199 JF |
510 | |
511 | return ret < 0 ? ret : 0; | |
3964a449 KH |
512 | } |
513 | ||
53dca511 SR |
514 | static int release_client_resource(struct client *client, u32 handle, |
515 | client_resource_release_fn_t release, | |
e21fcf79 | 516 | struct client_resource **return_resource) |
3964a449 | 517 | { |
e21fcf79 | 518 | struct client_resource *resource; |
3964a449 | 519 | |
3ba94986 | 520 | spin_lock_irq(&client->lock); |
45ee3199 | 521 | if (client->in_shutdown) |
e21fcf79 | 522 | resource = NULL; |
45ee3199 | 523 | else |
e21fcf79 SR |
524 | resource = idr_find(&client->resource_idr, handle); |
525 | if (resource && resource->release == release) | |
45ee3199 | 526 | idr_remove(&client->resource_idr, handle); |
3ba94986 | 527 | spin_unlock_irq(&client->lock); |
3964a449 | 528 | |
e21fcf79 | 529 | if (!(resource && resource->release == release)) |
3964a449 KH |
530 | return -EINVAL; |
531 | ||
e21fcf79 SR |
532 | if (return_resource) |
533 | *return_resource = resource; | |
3964a449 | 534 | else |
e21fcf79 | 535 | resource->release(client, resource); |
3964a449 | 536 | |
fb443036 SR |
537 | client_put(client); |
538 | ||
3964a449 KH |
539 | return 0; |
540 | } | |
541 | ||
53dca511 SR |
542 | static void release_transaction(struct client *client, |
543 | struct client_resource *resource) | |
3964a449 | 544 | { |
3964a449 KH |
545 | } |
546 | ||
53dca511 SR |
547 | static void complete_transaction(struct fw_card *card, int rcode, |
548 | void *payload, size_t length, void *data) | |
19a15b93 | 549 | { |
97c18b7f SR |
550 | struct outbound_transaction_event *e = data; |
551 | struct fw_cdev_event_response *rsp = &e->response; | |
552 | struct client *client = e->client; | |
28cf6a04 | 553 | unsigned long flags; |
19a15b93 | 554 | |
97c18b7f SR |
555 | if (length < rsp->length) |
556 | rsp->length = length; | |
19a15b93 | 557 | if (rcode == RCODE_COMPLETE) |
97c18b7f | 558 | memcpy(rsp->data, payload, rsp->length); |
19a15b93 | 559 | |
28cf6a04 | 560 | spin_lock_irqsave(&client->lock, flags); |
5a5e62da CL |
561 | idr_remove(&client->resource_idr, e->r.resource.handle); |
562 | if (client->in_shutdown) | |
563 | wake_up(&client->tx_flush_wait); | |
28cf6a04 KH |
564 | spin_unlock_irqrestore(&client->lock, flags); |
565 | ||
97c18b7f SR |
566 | rsp->type = FW_CDEV_EVENT_RESPONSE; |
567 | rsp->rcode = rcode; | |
8401d92b DM |
568 | |
569 | /* | |
97c18b7f | 570 | * In the case that sizeof(*rsp) doesn't align with the position of the |
8401d92b DM |
571 | * data, and the read is short, preserve an extra copy of the data |
572 | * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless | |
573 | * for short reads and some apps depended on it, this is both safe | |
574 | * and prudent for compatibility. | |
575 | */ | |
97c18b7f SR |
576 | if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data)) |
577 | queue_event(client, &e->event, rsp, sizeof(*rsp), | |
578 | rsp->data, rsp->length); | |
8401d92b | 579 | else |
97c18b7f | 580 | queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length, |
8401d92b | 581 | NULL, 0); |
fb443036 | 582 | |
5a5e62da CL |
583 | /* Drop the idr's reference */ |
584 | client_put(client); | |
19a15b93 KH |
585 | } |
586 | ||
acfe8333 JFSR |
587 | static int init_request(struct client *client, |
588 | struct fw_cdev_send_request *request, | |
589 | int destination_id, int speed) | |
19a15b93 | 590 | { |
97c18b7f | 591 | struct outbound_transaction_event *e; |
1f3125af | 592 | int ret; |
19a15b93 | 593 | |
18e9b10f SR |
594 | if (request->tcode != TCODE_STREAM_DATA && |
595 | (request->length > 4096 || request->length > 512 << speed)) | |
5d3fd692 | 596 | return -EIO; |
19a15b93 | 597 | |
a8e93f3d CL |
598 | if (request->tcode == TCODE_WRITE_QUADLET_REQUEST && |
599 | request->length < 4) | |
600 | return -EINVAL; | |
601 | ||
97c18b7f SR |
602 | e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL); |
603 | if (e == NULL) | |
19a15b93 KH |
604 | return -ENOMEM; |
605 | ||
97c18b7f SR |
606 | e->client = client; |
607 | e->response.length = request->length; | |
608 | e->response.closure = request->closure; | |
19a15b93 | 609 | |
4f259223 | 610 | if (request->data && |
97c18b7f | 611 | copy_from_user(e->response.data, |
4f259223 | 612 | u64_to_uptr(request->data), request->length)) { |
1f3125af | 613 | ret = -EFAULT; |
45ee3199 | 614 | goto failed; |
1f3125af SR |
615 | } |
616 | ||
97c18b7f SR |
617 | e->r.resource.release = release_transaction; |
618 | ret = add_client_resource(client, &e->r.resource, GFP_KERNEL); | |
45ee3199 JF |
619 | if (ret < 0) |
620 | goto failed; | |
28cf6a04 | 621 | |
acfe8333 | 622 | fw_send_request(client->device->card, &e->r.transaction, |
664d8010 SR |
623 | request->tcode, destination_id, request->generation, |
624 | speed, request->offset, e->response.data, | |
625 | request->length, complete_transaction, e); | |
626 | return 0; | |
19a15b93 | 627 | |
45ee3199 | 628 | failed: |
97c18b7f | 629 | kfree(e); |
1f3125af SR |
630 | |
631 | return ret; | |
19a15b93 KH |
632 | } |
633 | ||
6e95dea7 | 634 | static int ioctl_send_request(struct client *client, union ioctl_arg *arg) |
acfe8333 | 635 | { |
6e95dea7 | 636 | switch (arg->send_request.tcode) { |
acfe8333 JFSR |
637 | case TCODE_WRITE_QUADLET_REQUEST: |
638 | case TCODE_WRITE_BLOCK_REQUEST: | |
639 | case TCODE_READ_QUADLET_REQUEST: | |
640 | case TCODE_READ_BLOCK_REQUEST: | |
641 | case TCODE_LOCK_MASK_SWAP: | |
642 | case TCODE_LOCK_COMPARE_SWAP: | |
643 | case TCODE_LOCK_FETCH_ADD: | |
644 | case TCODE_LOCK_LITTLE_ADD: | |
645 | case TCODE_LOCK_BOUNDED_ADD: | |
646 | case TCODE_LOCK_WRAP_ADD: | |
647 | case TCODE_LOCK_VENDOR_DEPENDENT: | |
648 | break; | |
649 | default: | |
650 | return -EINVAL; | |
651 | } | |
652 | ||
6e95dea7 | 653 | return init_request(client, &arg->send_request, client->device->node_id, |
acfe8333 JFSR |
654 | client->device->max_speed); |
655 | } | |
656 | ||
281e2032 SR |
657 | static inline bool is_fcp_request(struct fw_request *request) |
658 | { | |
659 | return request == NULL; | |
660 | } | |
661 | ||
53dca511 SR |
662 | static void release_request(struct client *client, |
663 | struct client_resource *resource) | |
3964a449 | 664 | { |
97c18b7f SR |
665 | struct inbound_transaction_resource *r = container_of(resource, |
666 | struct inbound_transaction_resource, resource); | |
3964a449 | 667 | |
281e2032 SR |
668 | if (is_fcp_request(r->request)) |
669 | kfree(r->data); | |
670 | else | |
08bd34c9 | 671 | fw_send_response(r->card, r->request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
672 | |
673 | fw_card_put(r->card); | |
97c18b7f | 674 | kfree(r); |
3964a449 KH |
675 | } |
676 | ||
97c18b7f | 677 | static void handle_request(struct fw_card *card, struct fw_request *request, |
53dca511 | 678 | int tcode, int destination, int source, |
33e553fe | 679 | int generation, unsigned long long offset, |
53dca511 | 680 | void *payload, size_t length, void *callback_data) |
19a15b93 | 681 | { |
97c18b7f SR |
682 | struct address_handler_resource *handler = callback_data; |
683 | struct inbound_transaction_resource *r; | |
684 | struct inbound_transaction_event *e; | |
e205597d | 685 | size_t event_size0; |
281e2032 | 686 | void *fcp_frame = NULL; |
45ee3199 | 687 | int ret; |
19a15b93 | 688 | |
0244f573 SR |
689 | /* card may be different from handler->client->device->card */ |
690 | fw_card_get(card); | |
691 | ||
97c18b7f | 692 | r = kmalloc(sizeof(*r), GFP_ATOMIC); |
2d826cc5 | 693 | e = kmalloc(sizeof(*e), GFP_ATOMIC); |
cfb0c9d1 | 694 | if (r == NULL || e == NULL) |
45ee3199 | 695 | goto failed; |
cfb0c9d1 | 696 | |
08bd34c9 | 697 | r->card = card; |
97c18b7f SR |
698 | r->request = request; |
699 | r->data = payload; | |
700 | r->length = length; | |
19a15b93 | 701 | |
281e2032 SR |
702 | if (is_fcp_request(request)) { |
703 | /* | |
704 | * FIXME: Let core-transaction.c manage a | |
705 | * single reference-counted copy? | |
706 | */ | |
707 | fcp_frame = kmemdup(payload, length, GFP_ATOMIC); | |
708 | if (fcp_frame == NULL) | |
709 | goto failed; | |
710 | ||
711 | r->data = fcp_frame; | |
712 | } | |
713 | ||
97c18b7f SR |
714 | r->resource.release = release_request; |
715 | ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC); | |
45ee3199 JF |
716 | if (ret < 0) |
717 | goto failed; | |
19a15b93 | 718 | |
e205597d SR |
719 | if (handler->client->version < FW_CDEV_VERSION_EVENT_REQUEST2) { |
720 | struct fw_cdev_event_request *req = &e->req.request; | |
721 | ||
722 | if (tcode & 0x10) | |
723 | tcode = TCODE_LOCK_REQUEST; | |
724 | ||
725 | req->type = FW_CDEV_EVENT_REQUEST; | |
726 | req->tcode = tcode; | |
727 | req->offset = offset; | |
728 | req->length = length; | |
729 | req->handle = r->resource.handle; | |
730 | req->closure = handler->closure; | |
731 | event_size0 = sizeof(*req); | |
732 | } else { | |
733 | struct fw_cdev_event_request2 *req = &e->req.request2; | |
734 | ||
735 | req->type = FW_CDEV_EVENT_REQUEST2; | |
736 | req->tcode = tcode; | |
737 | req->offset = offset; | |
738 | req->source_node_id = source; | |
739 | req->destination_node_id = destination; | |
740 | req->card = card->index; | |
741 | req->generation = generation; | |
742 | req->length = length; | |
743 | req->handle = r->resource.handle; | |
744 | req->closure = handler->closure; | |
745 | event_size0 = sizeof(*req); | |
746 | } | |
19a15b93 | 747 | |
97c18b7f | 748 | queue_event(handler->client, &e->event, |
e205597d | 749 | &e->req, event_size0, r->data, length); |
45ee3199 JF |
750 | return; |
751 | ||
752 | failed: | |
97c18b7f | 753 | kfree(r); |
45ee3199 | 754 | kfree(e); |
281e2032 SR |
755 | kfree(fcp_frame); |
756 | ||
757 | if (!is_fcp_request(request)) | |
db5d247a | 758 | fw_send_response(card, request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
759 | |
760 | fw_card_put(card); | |
19a15b93 KH |
761 | } |
762 | ||
53dca511 SR |
763 | static void release_address_handler(struct client *client, |
764 | struct client_resource *resource) | |
3964a449 | 765 | { |
97c18b7f SR |
766 | struct address_handler_resource *r = |
767 | container_of(resource, struct address_handler_resource, resource); | |
3964a449 | 768 | |
97c18b7f SR |
769 | fw_core_remove_address_handler(&r->handler); |
770 | kfree(r); | |
3964a449 KH |
771 | } |
772 | ||
6e95dea7 | 773 | static int ioctl_allocate(struct client *client, union ioctl_arg *arg) |
19a15b93 | 774 | { |
6e95dea7 | 775 | struct fw_cdev_allocate *a = &arg->allocate; |
97c18b7f | 776 | struct address_handler_resource *r; |
19a15b93 | 777 | struct fw_address_region region; |
45ee3199 | 778 | int ret; |
19a15b93 | 779 | |
97c18b7f SR |
780 | r = kmalloc(sizeof(*r), GFP_KERNEL); |
781 | if (r == NULL) | |
19a15b93 KH |
782 | return -ENOMEM; |
783 | ||
6e95dea7 | 784 | region.start = a->offset; |
8e2b2b46 SR |
785 | if (client->version < FW_CDEV_VERSION_ALLOCATE_REGION_END) |
786 | region.end = a->offset + a->length; | |
787 | else | |
788 | region.end = a->region_end; | |
789 | ||
6e95dea7 | 790 | r->handler.length = a->length; |
97c18b7f | 791 | r->handler.address_callback = handle_request; |
6e95dea7 SR |
792 | r->handler.callback_data = r; |
793 | r->closure = a->closure; | |
794 | r->client = client; | |
19a15b93 | 795 | |
97c18b7f | 796 | ret = fw_core_add_address_handler(&r->handler, ®ion); |
3e0b5f0d | 797 | if (ret < 0) { |
97c18b7f | 798 | kfree(r); |
3e0b5f0d | 799 | return ret; |
19a15b93 | 800 | } |
8e2b2b46 | 801 | a->offset = r->handler.offset; |
19a15b93 | 802 | |
97c18b7f SR |
803 | r->resource.release = release_address_handler; |
804 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 805 | if (ret < 0) { |
97c18b7f | 806 | release_address_handler(client, &r->resource); |
45ee3199 JF |
807 | return ret; |
808 | } | |
6e95dea7 | 809 | a->handle = r->resource.handle; |
19a15b93 KH |
810 | |
811 | return 0; | |
812 | } | |
813 | ||
6e95dea7 | 814 | static int ioctl_deallocate(struct client *client, union ioctl_arg *arg) |
9472316b | 815 | { |
6e95dea7 | 816 | return release_client_resource(client, arg->deallocate.handle, |
45ee3199 | 817 | release_address_handler, NULL); |
9472316b KH |
818 | } |
819 | ||
6e95dea7 | 820 | static int ioctl_send_response(struct client *client, union ioctl_arg *arg) |
19a15b93 | 821 | { |
6e95dea7 | 822 | struct fw_cdev_send_response *a = &arg->send_response; |
3964a449 | 823 | struct client_resource *resource; |
97c18b7f | 824 | struct inbound_transaction_resource *r; |
7e44c0b5 | 825 | int ret = 0; |
19a15b93 | 826 | |
6e95dea7 | 827 | if (release_client_resource(client, a->handle, |
45ee3199 | 828 | release_request, &resource) < 0) |
19a15b93 | 829 | return -EINVAL; |
45ee3199 | 830 | |
97c18b7f SR |
831 | r = container_of(resource, struct inbound_transaction_resource, |
832 | resource); | |
281e2032 SR |
833 | if (is_fcp_request(r->request)) |
834 | goto out; | |
835 | ||
a10c0ce7 CL |
836 | if (a->length != fw_get_response_length(r->request)) { |
837 | ret = -EINVAL; | |
838 | kfree(r->request); | |
839 | goto out; | |
840 | } | |
841 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length)) { | |
281e2032 SR |
842 | ret = -EFAULT; |
843 | kfree(r->request); | |
844 | goto out; | |
7e44c0b5 | 845 | } |
08bd34c9 | 846 | fw_send_response(r->card, r->request, a->rcode); |
7e44c0b5 | 847 | out: |
0244f573 | 848 | fw_card_put(r->card); |
19a15b93 KH |
849 | kfree(r); |
850 | ||
7e44c0b5 | 851 | return ret; |
19a15b93 KH |
852 | } |
853 | ||
6e95dea7 | 854 | static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg) |
5371842b | 855 | { |
02d37bed | 856 | fw_schedule_bus_reset(client->device->card, true, |
6e95dea7 | 857 | arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET); |
02d37bed | 858 | return 0; |
5371842b KH |
859 | } |
860 | ||
3964a449 KH |
861 | static void release_descriptor(struct client *client, |
862 | struct client_resource *resource) | |
863 | { | |
97c18b7f SR |
864 | struct descriptor_resource *r = |
865 | container_of(resource, struct descriptor_resource, resource); | |
3964a449 | 866 | |
97c18b7f SR |
867 | fw_core_remove_descriptor(&r->descriptor); |
868 | kfree(r); | |
3964a449 KH |
869 | } |
870 | ||
6e95dea7 | 871 | static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 872 | { |
6e95dea7 | 873 | struct fw_cdev_add_descriptor *a = &arg->add_descriptor; |
97c18b7f | 874 | struct descriptor_resource *r; |
45ee3199 | 875 | int ret; |
66dea3e5 | 876 | |
de487da8 | 877 | /* Access policy: Allow this ioctl only on local nodes' device files. */ |
92368890 | 878 | if (!client->device->is_local) |
de487da8 SR |
879 | return -ENOSYS; |
880 | ||
6e95dea7 | 881 | if (a->length > 256) |
66dea3e5 KH |
882 | return -EINVAL; |
883 | ||
6e95dea7 | 884 | r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL); |
97c18b7f | 885 | if (r == NULL) |
66dea3e5 KH |
886 | return -ENOMEM; |
887 | ||
6e95dea7 | 888 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) { |
45ee3199 JF |
889 | ret = -EFAULT; |
890 | goto failed; | |
66dea3e5 KH |
891 | } |
892 | ||
6e95dea7 SR |
893 | r->descriptor.length = a->length; |
894 | r->descriptor.immediate = a->immediate; | |
895 | r->descriptor.key = a->key; | |
97c18b7f | 896 | r->descriptor.data = r->data; |
66dea3e5 | 897 | |
97c18b7f | 898 | ret = fw_core_add_descriptor(&r->descriptor); |
45ee3199 JF |
899 | if (ret < 0) |
900 | goto failed; | |
66dea3e5 | 901 | |
97c18b7f SR |
902 | r->resource.release = release_descriptor; |
903 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 904 | if (ret < 0) { |
97c18b7f | 905 | fw_core_remove_descriptor(&r->descriptor); |
45ee3199 JF |
906 | goto failed; |
907 | } | |
6e95dea7 | 908 | a->handle = r->resource.handle; |
66dea3e5 KH |
909 | |
910 | return 0; | |
45ee3199 | 911 | failed: |
97c18b7f | 912 | kfree(r); |
45ee3199 JF |
913 | |
914 | return ret; | |
66dea3e5 KH |
915 | } |
916 | ||
6e95dea7 | 917 | static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 918 | { |
6e95dea7 | 919 | return release_client_resource(client, arg->remove_descriptor.handle, |
45ee3199 | 920 | release_descriptor, NULL); |
66dea3e5 KH |
921 | } |
922 | ||
53dca511 SR |
923 | static void iso_callback(struct fw_iso_context *context, u32 cycle, |
924 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
925 | { |
926 | struct client *client = data; | |
97c18b7f | 927 | struct iso_interrupt_event *e; |
19a15b93 | 928 | |
56d04cb1 | 929 | e = kmalloc(sizeof(*e) + header_length, GFP_ATOMIC); |
cfb0c9d1 | 930 | if (e == NULL) |
19a15b93 | 931 | return; |
cfb0c9d1 | 932 | |
97c18b7f SR |
933 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
934 | e->interrupt.closure = client->iso_closure; | |
935 | e->interrupt.cycle = cycle; | |
936 | e->interrupt.header_length = header_length; | |
937 | memcpy(e->interrupt.header, header, header_length); | |
938 | queue_event(client, &e->event, &e->interrupt, | |
939 | sizeof(e->interrupt) + header_length, NULL, 0); | |
19a15b93 KH |
940 | } |
941 | ||
872e330e SR |
942 | static void iso_mc_callback(struct fw_iso_context *context, |
943 | dma_addr_t completed, void *data) | |
944 | { | |
945 | struct client *client = data; | |
946 | struct iso_interrupt_mc_event *e; | |
947 | ||
948 | e = kmalloc(sizeof(*e), GFP_ATOMIC); | |
cfb0c9d1 | 949 | if (e == NULL) |
872e330e | 950 | return; |
cfb0c9d1 | 951 | |
872e330e SR |
952 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL; |
953 | e->interrupt.closure = client->iso_closure; | |
954 | e->interrupt.completed = fw_iso_buffer_lookup(&client->buffer, | |
955 | completed); | |
956 | queue_event(client, &e->event, &e->interrupt, | |
957 | sizeof(e->interrupt), NULL, 0); | |
958 | } | |
959 | ||
0b6c4857 SR |
960 | static enum dma_data_direction iso_dma_direction(struct fw_iso_context *context) |
961 | { | |
962 | if (context->type == FW_ISO_CONTEXT_TRANSMIT) | |
963 | return DMA_TO_DEVICE; | |
964 | else | |
965 | return DMA_FROM_DEVICE; | |
966 | } | |
967 | ||
6e95dea7 | 968 | static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) |
19a15b93 | 969 | { |
6e95dea7 | 970 | struct fw_cdev_create_iso_context *a = &arg->create_iso_context; |
24315c5e | 971 | struct fw_iso_context *context; |
872e330e | 972 | fw_iso_callback_t cb; |
0b6c4857 | 973 | int ret; |
19a15b93 | 974 | |
eb5b35a5 | 975 | BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT != FW_ISO_CONTEXT_TRANSMIT || |
872e330e SR |
976 | FW_CDEV_ISO_CONTEXT_RECEIVE != FW_ISO_CONTEXT_RECEIVE || |
977 | FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL != | |
978 | FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL); | |
21efb3cf | 979 | |
6e95dea7 | 980 | switch (a->type) { |
872e330e SR |
981 | case FW_ISO_CONTEXT_TRANSMIT: |
982 | if (a->speed > SCODE_3200 || a->channel > 63) | |
c70dc788 | 983 | return -EINVAL; |
872e330e SR |
984 | |
985 | cb = iso_callback; | |
c70dc788 KH |
986 | break; |
987 | ||
872e330e SR |
988 | case FW_ISO_CONTEXT_RECEIVE: |
989 | if (a->header_size < 4 || (a->header_size & 3) || | |
990 | a->channel > 63) | |
c70dc788 | 991 | return -EINVAL; |
872e330e SR |
992 | |
993 | cb = iso_callback; | |
994 | break; | |
995 | ||
996 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
997 | cb = (fw_iso_callback_t)iso_mc_callback; | |
c70dc788 KH |
998 | break; |
999 | ||
1000 | default: | |
21efb3cf | 1001 | return -EINVAL; |
c70dc788 KH |
1002 | } |
1003 | ||
6e95dea7 | 1004 | context = fw_iso_context_create(client->device->card, a->type, |
872e330e | 1005 | a->channel, a->speed, a->header_size, cb, client); |
24315c5e KH |
1006 | if (IS_ERR(context)) |
1007 | return PTR_ERR(context); | |
1008 | ||
bdfe273e CL |
1009 | /* We only support one context at this time. */ |
1010 | spin_lock_irq(&client->lock); | |
1011 | if (client->iso_context != NULL) { | |
1012 | spin_unlock_irq(&client->lock); | |
1013 | fw_iso_context_destroy(context); | |
0b6c4857 | 1014 | |
bdfe273e CL |
1015 | return -EBUSY; |
1016 | } | |
0b6c4857 SR |
1017 | if (!client->buffer_is_mapped) { |
1018 | ret = fw_iso_buffer_map_dma(&client->buffer, | |
1019 | client->device->card, | |
1020 | iso_dma_direction(context)); | |
1021 | if (ret < 0) { | |
1022 | spin_unlock_irq(&client->lock); | |
1023 | fw_iso_context_destroy(context); | |
1024 | ||
1025 | return ret; | |
1026 | } | |
1027 | client->buffer_is_mapped = true; | |
1028 | } | |
6e95dea7 | 1029 | client->iso_closure = a->closure; |
24315c5e | 1030 | client->iso_context = context; |
bdfe273e | 1031 | spin_unlock_irq(&client->lock); |
19a15b93 | 1032 | |
6e95dea7 | 1033 | a->handle = 0; |
abaa5743 | 1034 | |
19a15b93 KH |
1035 | return 0; |
1036 | } | |
1037 | ||
872e330e SR |
1038 | static int ioctl_set_iso_channels(struct client *client, union ioctl_arg *arg) |
1039 | { | |
1040 | struct fw_cdev_set_iso_channels *a = &arg->set_iso_channels; | |
1041 | struct fw_iso_context *ctx = client->iso_context; | |
1042 | ||
1043 | if (ctx == NULL || a->handle != 0) | |
1044 | return -EINVAL; | |
1045 | ||
1046 | return fw_iso_context_set_channels(ctx, &a->channels); | |
1047 | } | |
1048 | ||
1ca31ae7 KH |
1049 | /* Macros for decoding the iso packet control header. */ |
1050 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) | |
1051 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) | |
1052 | #define GET_SKIP(v) (((v) >> 17) & 0x01) | |
7a100344 SR |
1053 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
1054 | #define GET_SY(v) (((v) >> 20) & 0x0f) | |
1ca31ae7 KH |
1055 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
1056 | ||
6e95dea7 | 1057 | static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1058 | { |
6e95dea7 | 1059 | struct fw_cdev_queue_iso *a = &arg->queue_iso; |
19a15b93 | 1060 | struct fw_cdev_iso_packet __user *p, *end, *next; |
9b32d5f3 | 1061 | struct fw_iso_context *ctx = client->iso_context; |
872e330e | 1062 | unsigned long payload, buffer_end, transmit_header_bytes = 0; |
1ca31ae7 | 1063 | u32 control; |
19a15b93 KH |
1064 | int count; |
1065 | struct { | |
1066 | struct fw_iso_packet packet; | |
1067 | u8 header[256]; | |
1068 | } u; | |
1069 | ||
6e95dea7 | 1070 | if (ctx == NULL || a->handle != 0) |
19a15b93 | 1071 | return -EINVAL; |
19a15b93 | 1072 | |
c781c06d KH |
1073 | /* |
1074 | * If the user passes a non-NULL data pointer, has mmap()'ed | |
19a15b93 KH |
1075 | * the iso buffer, and the pointer points inside the buffer, |
1076 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 1077 | * set them both to 0, which will still let packets with |
19a15b93 KH |
1078 | * payload_length == 0 through. In other words, if no packets |
1079 | * use the indirect payload, the iso buffer need not be mapped | |
6e95dea7 | 1080 | * and the a->data pointer is ignored. |
c781c06d | 1081 | */ |
6e95dea7 | 1082 | payload = (unsigned long)a->data - client->vm_start; |
ef370ee7 | 1083 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
6e95dea7 | 1084 | if (a->data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 1085 | payload >= buffer_end) { |
9aad8125 | 1086 | payload = 0; |
ef370ee7 | 1087 | buffer_end = 0; |
19a15b93 KH |
1088 | } |
1089 | ||
872e330e SR |
1090 | if (ctx->type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL && payload & 3) |
1091 | return -EINVAL; | |
1ccc9147 | 1092 | |
872e330e | 1093 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets); |
6e95dea7 | 1094 | if (!access_ok(VERIFY_READ, p, a->size)) |
19a15b93 KH |
1095 | return -EFAULT; |
1096 | ||
6e95dea7 | 1097 | end = (void __user *)p + a->size; |
19a15b93 KH |
1098 | count = 0; |
1099 | while (p < end) { | |
1ca31ae7 | 1100 | if (get_user(control, &p->control)) |
19a15b93 | 1101 | return -EFAULT; |
1ca31ae7 KH |
1102 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
1103 | u.packet.interrupt = GET_INTERRUPT(control); | |
1104 | u.packet.skip = GET_SKIP(control); | |
1105 | u.packet.tag = GET_TAG(control); | |
1106 | u.packet.sy = GET_SY(control); | |
1107 | u.packet.header_length = GET_HEADER_LENGTH(control); | |
295e3feb | 1108 | |
872e330e SR |
1109 | switch (ctx->type) { |
1110 | case FW_ISO_CONTEXT_TRANSMIT: | |
1111 | if (u.packet.header_length & 3) | |
385ab5bc | 1112 | return -EINVAL; |
ae2a9766 | 1113 | transmit_header_bytes = u.packet.header_length; |
872e330e SR |
1114 | break; |
1115 | ||
1116 | case FW_ISO_CONTEXT_RECEIVE: | |
69e61d0c SR |
1117 | if (u.packet.header_length == 0 || |
1118 | u.packet.header_length % ctx->header_size != 0) | |
385ab5bc | 1119 | return -EINVAL; |
872e330e SR |
1120 | break; |
1121 | ||
1122 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
1123 | if (u.packet.payload_length == 0 || | |
1124 | u.packet.payload_length & 3) | |
295e3feb | 1125 | return -EINVAL; |
872e330e | 1126 | break; |
295e3feb KH |
1127 | } |
1128 | ||
19a15b93 | 1129 | next = (struct fw_cdev_iso_packet __user *) |
ae2a9766 | 1130 | &p->header[transmit_header_bytes / 4]; |
19a15b93 KH |
1131 | if (next > end) |
1132 | return -EINVAL; | |
1133 | if (__copy_from_user | |
ae2a9766 | 1134 | (u.packet.header, p->header, transmit_header_bytes)) |
19a15b93 | 1135 | return -EFAULT; |
98b6cbe8 | 1136 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
1137 | u.packet.header_length + u.packet.payload_length > 0) |
1138 | return -EINVAL; | |
ef370ee7 | 1139 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
1140 | return -EINVAL; |
1141 | ||
9b32d5f3 KH |
1142 | if (fw_iso_context_queue(ctx, &u.packet, |
1143 | &client->buffer, payload)) | |
19a15b93 KH |
1144 | break; |
1145 | ||
1146 | p = next; | |
1147 | payload += u.packet.payload_length; | |
1148 | count++; | |
1149 | } | |
13882a82 | 1150 | fw_iso_context_queue_flush(ctx); |
19a15b93 | 1151 | |
6e95dea7 SR |
1152 | a->size -= uptr_to_u64(p) - a->packets; |
1153 | a->packets = uptr_to_u64(p); | |
1154 | a->data = client->vm_start + payload; | |
19a15b93 KH |
1155 | |
1156 | return count; | |
1157 | } | |
1158 | ||
6e95dea7 | 1159 | static int ioctl_start_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1160 | { |
6e95dea7 | 1161 | struct fw_cdev_start_iso *a = &arg->start_iso; |
19a15b93 | 1162 | |
eb5b35a5 SR |
1163 | BUILD_BUG_ON( |
1164 | FW_CDEV_ISO_CONTEXT_MATCH_TAG0 != FW_ISO_CONTEXT_MATCH_TAG0 || | |
1165 | FW_CDEV_ISO_CONTEXT_MATCH_TAG1 != FW_ISO_CONTEXT_MATCH_TAG1 || | |
1166 | FW_CDEV_ISO_CONTEXT_MATCH_TAG2 != FW_ISO_CONTEXT_MATCH_TAG2 || | |
1167 | FW_CDEV_ISO_CONTEXT_MATCH_TAG3 != FW_ISO_CONTEXT_MATCH_TAG3 || | |
1168 | FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS != FW_ISO_CONTEXT_MATCH_ALL_TAGS); | |
1169 | ||
6e95dea7 | 1170 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 | 1171 | return -EINVAL; |
fae60312 | 1172 | |
6e95dea7 SR |
1173 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE && |
1174 | (a->tags == 0 || a->tags > 15 || a->sync > 15)) | |
1175 | return -EINVAL; | |
eb0306ea | 1176 | |
6e95dea7 SR |
1177 | return fw_iso_context_start(client->iso_context, |
1178 | a->cycle, a->sync, a->tags); | |
19a15b93 KH |
1179 | } |
1180 | ||
6e95dea7 | 1181 | static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg) |
b8295668 | 1182 | { |
6e95dea7 | 1183 | struct fw_cdev_stop_iso *a = &arg->stop_iso; |
abaa5743 | 1184 | |
6e95dea7 | 1185 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 KH |
1186 | return -EINVAL; |
1187 | ||
b8295668 KH |
1188 | return fw_iso_context_stop(client->iso_context); |
1189 | } | |
1190 | ||
d1bbd209 CL |
1191 | static int ioctl_flush_iso(struct client *client, union ioctl_arg *arg) |
1192 | { | |
1193 | struct fw_cdev_flush_iso *a = &arg->flush_iso; | |
1194 | ||
1195 | if (client->iso_context == NULL || a->handle != 0) | |
1196 | return -EINVAL; | |
1197 | ||
1198 | return fw_iso_context_flush_completions(client->iso_context); | |
1199 | } | |
1200 | ||
6e95dea7 | 1201 | static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg) |
a64408b9 | 1202 | { |
6e95dea7 | 1203 | struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2; |
a64408b9 | 1204 | struct fw_card *card = client->device->card; |
abfe5a01 | 1205 | struct timespec ts = {0, 0}; |
4a9bde9b | 1206 | u32 cycle_time; |
abfe5a01 | 1207 | int ret = 0; |
a64408b9 | 1208 | |
4a9bde9b | 1209 | local_irq_disable(); |
a64408b9 | 1210 | |
0fcff4e3 | 1211 | cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME); |
abfe5a01 | 1212 | |
6e95dea7 | 1213 | switch (a->clk_id) { |
abfe5a01 SR |
1214 | case CLOCK_REALTIME: getnstimeofday(&ts); break; |
1215 | case CLOCK_MONOTONIC: do_posix_clock_monotonic_gettime(&ts); break; | |
1216 | case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts); break; | |
1217 | default: | |
1218 | ret = -EINVAL; | |
1219 | } | |
a64408b9 | 1220 | |
4a9bde9b | 1221 | local_irq_enable(); |
a64408b9 | 1222 | |
6e95dea7 SR |
1223 | a->tv_sec = ts.tv_sec; |
1224 | a->tv_nsec = ts.tv_nsec; | |
1225 | a->cycle_timer = cycle_time; | |
abfe5a01 SR |
1226 | |
1227 | return ret; | |
1228 | } | |
1229 | ||
6e95dea7 | 1230 | static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg) |
abfe5a01 | 1231 | { |
6e95dea7 | 1232 | struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer; |
abfe5a01 SR |
1233 | struct fw_cdev_get_cycle_timer2 ct2; |
1234 | ||
1235 | ct2.clk_id = CLOCK_REALTIME; | |
6e95dea7 | 1236 | ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2); |
abfe5a01 | 1237 | |
6e95dea7 SR |
1238 | a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC; |
1239 | a->cycle_timer = ct2.cycle_timer; | |
4a9bde9b | 1240 | |
a64408b9 SR |
1241 | return 0; |
1242 | } | |
1243 | ||
b1bda4cd JFSR |
1244 | static void iso_resource_work(struct work_struct *work) |
1245 | { | |
1246 | struct iso_resource_event *e; | |
1247 | struct iso_resource *r = | |
1248 | container_of(work, struct iso_resource, work.work); | |
1249 | struct client *client = r->client; | |
1250 | int generation, channel, bandwidth, todo; | |
1251 | bool skip, free, success; | |
1252 | ||
1253 | spin_lock_irq(&client->lock); | |
1254 | generation = client->device->generation; | |
1255 | todo = r->todo; | |
1256 | /* Allow 1000ms grace period for other reallocations. */ | |
1257 | if (todo == ISO_RES_ALLOC && | |
e71084af CL |
1258 | time_before64(get_jiffies_64(), |
1259 | client->device->card->reset_jiffies + HZ)) { | |
9fb551bf | 1260 | schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3)); |
b1bda4cd JFSR |
1261 | skip = true; |
1262 | } else { | |
1263 | /* We could be called twice within the same generation. */ | |
1264 | skip = todo == ISO_RES_REALLOC && | |
1265 | r->generation == generation; | |
1266 | } | |
1ec3c026 SR |
1267 | free = todo == ISO_RES_DEALLOC || |
1268 | todo == ISO_RES_ALLOC_ONCE || | |
1269 | todo == ISO_RES_DEALLOC_ONCE; | |
b1bda4cd JFSR |
1270 | r->generation = generation; |
1271 | spin_unlock_irq(&client->lock); | |
1272 | ||
1273 | if (skip) | |
1274 | goto out; | |
1275 | ||
1276 | bandwidth = r->bandwidth; | |
1277 | ||
1278 | fw_iso_resource_manage(client->device->card, generation, | |
1279 | r->channels, &channel, &bandwidth, | |
1ec3c026 SR |
1280 | todo == ISO_RES_ALLOC || |
1281 | todo == ISO_RES_REALLOC || | |
f30e6d3e | 1282 | todo == ISO_RES_ALLOC_ONCE); |
b1bda4cd JFSR |
1283 | /* |
1284 | * Is this generation outdated already? As long as this resource sticks | |
1285 | * in the idr, it will be scheduled again for a newer generation or at | |
1286 | * shutdown. | |
1287 | */ | |
1288 | if (channel == -EAGAIN && | |
1289 | (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC)) | |
1290 | goto out; | |
1291 | ||
1292 | success = channel >= 0 || bandwidth > 0; | |
1293 | ||
1294 | spin_lock_irq(&client->lock); | |
1295 | /* | |
1296 | * Transit from allocation to reallocation, except if the client | |
1297 | * requested deallocation in the meantime. | |
1298 | */ | |
1299 | if (r->todo == ISO_RES_ALLOC) | |
1300 | r->todo = ISO_RES_REALLOC; | |
1301 | /* | |
1302 | * Allocation or reallocation failure? Pull this resource out of the | |
1303 | * idr and prepare for deletion, unless the client is shutting down. | |
1304 | */ | |
1305 | if (r->todo == ISO_RES_REALLOC && !success && | |
1306 | !client->in_shutdown && | |
1307 | idr_find(&client->resource_idr, r->resource.handle)) { | |
1308 | idr_remove(&client->resource_idr, r->resource.handle); | |
1309 | client_put(client); | |
1310 | free = true; | |
1311 | } | |
1312 | spin_unlock_irq(&client->lock); | |
1313 | ||
1314 | if (todo == ISO_RES_ALLOC && channel >= 0) | |
5d9cb7d2 | 1315 | r->channels = 1ULL << channel; |
b1bda4cd JFSR |
1316 | |
1317 | if (todo == ISO_RES_REALLOC && success) | |
1318 | goto out; | |
1319 | ||
1ec3c026 | 1320 | if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) { |
b1bda4cd JFSR |
1321 | e = r->e_alloc; |
1322 | r->e_alloc = NULL; | |
1323 | } else { | |
1324 | e = r->e_dealloc; | |
1325 | r->e_dealloc = NULL; | |
1326 | } | |
e21fcf79 SR |
1327 | e->iso_resource.handle = r->resource.handle; |
1328 | e->iso_resource.channel = channel; | |
1329 | e->iso_resource.bandwidth = bandwidth; | |
b1bda4cd JFSR |
1330 | |
1331 | queue_event(client, &e->event, | |
e21fcf79 | 1332 | &e->iso_resource, sizeof(e->iso_resource), NULL, 0); |
b1bda4cd JFSR |
1333 | |
1334 | if (free) { | |
1335 | cancel_delayed_work(&r->work); | |
1336 | kfree(r->e_alloc); | |
1337 | kfree(r->e_dealloc); | |
1338 | kfree(r); | |
1339 | } | |
1340 | out: | |
1341 | client_put(client); | |
1342 | } | |
1343 | ||
b1bda4cd JFSR |
1344 | static void release_iso_resource(struct client *client, |
1345 | struct client_resource *resource) | |
1346 | { | |
1347 | struct iso_resource *r = | |
1348 | container_of(resource, struct iso_resource, resource); | |
1349 | ||
1350 | spin_lock_irq(&client->lock); | |
1351 | r->todo = ISO_RES_DEALLOC; | |
9fb551bf | 1352 | schedule_iso_resource(r, 0); |
b1bda4cd JFSR |
1353 | spin_unlock_irq(&client->lock); |
1354 | } | |
1355 | ||
1ec3c026 SR |
1356 | static int init_iso_resource(struct client *client, |
1357 | struct fw_cdev_allocate_iso_resource *request, int todo) | |
b1bda4cd | 1358 | { |
b1bda4cd JFSR |
1359 | struct iso_resource_event *e1, *e2; |
1360 | struct iso_resource *r; | |
1361 | int ret; | |
1362 | ||
1363 | if ((request->channels == 0 && request->bandwidth == 0) || | |
bdabfa54 | 1364 | request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL) |
b1bda4cd JFSR |
1365 | return -EINVAL; |
1366 | ||
1367 | r = kmalloc(sizeof(*r), GFP_KERNEL); | |
1368 | e1 = kmalloc(sizeof(*e1), GFP_KERNEL); | |
1369 | e2 = kmalloc(sizeof(*e2), GFP_KERNEL); | |
1370 | if (r == NULL || e1 == NULL || e2 == NULL) { | |
1371 | ret = -ENOMEM; | |
1372 | goto fail; | |
1373 | } | |
1374 | ||
1375 | INIT_DELAYED_WORK(&r->work, iso_resource_work); | |
1376 | r->client = client; | |
1ec3c026 | 1377 | r->todo = todo; |
b1bda4cd JFSR |
1378 | r->generation = -1; |
1379 | r->channels = request->channels; | |
1380 | r->bandwidth = request->bandwidth; | |
1381 | r->e_alloc = e1; | |
1382 | r->e_dealloc = e2; | |
1383 | ||
e21fcf79 SR |
1384 | e1->iso_resource.closure = request->closure; |
1385 | e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED; | |
1386 | e2->iso_resource.closure = request->closure; | |
1387 | e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED; | |
b1bda4cd | 1388 | |
1ec3c026 SR |
1389 | if (todo == ISO_RES_ALLOC) { |
1390 | r->resource.release = release_iso_resource; | |
1391 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
81610b8f SR |
1392 | if (ret < 0) |
1393 | goto fail; | |
1ec3c026 SR |
1394 | } else { |
1395 | r->resource.release = NULL; | |
1396 | r->resource.handle = -1; | |
9fb551bf | 1397 | schedule_iso_resource(r, 0); |
1ec3c026 | 1398 | } |
b1bda4cd JFSR |
1399 | request->handle = r->resource.handle; |
1400 | ||
1401 | return 0; | |
1402 | fail: | |
1403 | kfree(r); | |
1404 | kfree(e1); | |
1405 | kfree(e2); | |
1406 | ||
1407 | return ret; | |
1408 | } | |
1409 | ||
6e95dea7 SR |
1410 | static int ioctl_allocate_iso_resource(struct client *client, |
1411 | union ioctl_arg *arg) | |
1ec3c026 | 1412 | { |
6e95dea7 SR |
1413 | return init_iso_resource(client, |
1414 | &arg->allocate_iso_resource, ISO_RES_ALLOC); | |
1ec3c026 SR |
1415 | } |
1416 | ||
6e95dea7 SR |
1417 | static int ioctl_deallocate_iso_resource(struct client *client, |
1418 | union ioctl_arg *arg) | |
b1bda4cd | 1419 | { |
6e95dea7 SR |
1420 | return release_client_resource(client, |
1421 | arg->deallocate.handle, release_iso_resource, NULL); | |
b1bda4cd JFSR |
1422 | } |
1423 | ||
6e95dea7 SR |
1424 | static int ioctl_allocate_iso_resource_once(struct client *client, |
1425 | union ioctl_arg *arg) | |
1ec3c026 | 1426 | { |
6e95dea7 SR |
1427 | return init_iso_resource(client, |
1428 | &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE); | |
1ec3c026 SR |
1429 | } |
1430 | ||
6e95dea7 SR |
1431 | static int ioctl_deallocate_iso_resource_once(struct client *client, |
1432 | union ioctl_arg *arg) | |
1ec3c026 | 1433 | { |
6e95dea7 SR |
1434 | return init_iso_resource(client, |
1435 | &arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE); | |
1ec3c026 SR |
1436 | } |
1437 | ||
c8a25900 SR |
1438 | /* |
1439 | * Returns a speed code: Maximum speed to or from this device, | |
1440 | * limited by the device's link speed, the local node's link speed, | |
1441 | * and all PHY port speeds between the two links. | |
1442 | */ | |
6e95dea7 | 1443 | static int ioctl_get_speed(struct client *client, union ioctl_arg *arg) |
33580a3e | 1444 | { |
c8a25900 | 1445 | return client->device->max_speed; |
33580a3e SR |
1446 | } |
1447 | ||
6e95dea7 SR |
1448 | static int ioctl_send_broadcast_request(struct client *client, |
1449 | union ioctl_arg *arg) | |
acfe8333 | 1450 | { |
6e95dea7 | 1451 | struct fw_cdev_send_request *a = &arg->send_request; |
acfe8333 | 1452 | |
6e95dea7 | 1453 | switch (a->tcode) { |
acfe8333 JFSR |
1454 | case TCODE_WRITE_QUADLET_REQUEST: |
1455 | case TCODE_WRITE_BLOCK_REQUEST: | |
1456 | break; | |
1457 | default: | |
1458 | return -EINVAL; | |
1459 | } | |
1460 | ||
1566f3dc | 1461 | /* Security policy: Only allow accesses to Units Space. */ |
6e95dea7 | 1462 | if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END) |
1566f3dc SR |
1463 | return -EACCES; |
1464 | ||
6e95dea7 | 1465 | return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100); |
acfe8333 JFSR |
1466 | } |
1467 | ||
6e95dea7 | 1468 | static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg) |
f8c2287c | 1469 | { |
6e95dea7 | 1470 | struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet; |
18e9b10f SR |
1471 | struct fw_cdev_send_request request; |
1472 | int dest; | |
f8c2287c | 1473 | |
6e95dea7 SR |
1474 | if (a->speed > client->device->card->link_speed || |
1475 | a->length > 1024 << a->speed) | |
18e9b10f | 1476 | return -EIO; |
f8c2287c | 1477 | |
6e95dea7 | 1478 | if (a->tag > 3 || a->channel > 63 || a->sy > 15) |
18e9b10f SR |
1479 | return -EINVAL; |
1480 | ||
6e95dea7 | 1481 | dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy); |
18e9b10f | 1482 | request.tcode = TCODE_STREAM_DATA; |
6e95dea7 SR |
1483 | request.length = a->length; |
1484 | request.closure = a->closure; | |
1485 | request.data = a->data; | |
1486 | request.generation = a->generation; | |
18e9b10f | 1487 | |
6e95dea7 | 1488 | return init_request(client, &request, dest, a->speed); |
f8c2287c JF |
1489 | } |
1490 | ||
850bb6f2 SR |
1491 | static void outbound_phy_packet_callback(struct fw_packet *packet, |
1492 | struct fw_card *card, int status) | |
1493 | { | |
1494 | struct outbound_phy_packet_event *e = | |
1495 | container_of(packet, struct outbound_phy_packet_event, p); | |
1496 | ||
1497 | switch (status) { | |
1498 | /* expected: */ | |
1499 | case ACK_COMPLETE: e->phy_packet.rcode = RCODE_COMPLETE; break; | |
1500 | /* should never happen with PHY packets: */ | |
1501 | case ACK_PENDING: e->phy_packet.rcode = RCODE_COMPLETE; break; | |
1502 | case ACK_BUSY_X: | |
1503 | case ACK_BUSY_A: | |
1504 | case ACK_BUSY_B: e->phy_packet.rcode = RCODE_BUSY; break; | |
1505 | case ACK_DATA_ERROR: e->phy_packet.rcode = RCODE_DATA_ERROR; break; | |
1506 | case ACK_TYPE_ERROR: e->phy_packet.rcode = RCODE_TYPE_ERROR; break; | |
1507 | /* stale generation; cancelled; on certain controllers: no ack */ | |
1508 | default: e->phy_packet.rcode = status; break; | |
1509 | } | |
cc550216 | 1510 | e->phy_packet.data[0] = packet->timestamp; |
850bb6f2 | 1511 | |
cc550216 SR |
1512 | queue_event(e->client, &e->event, &e->phy_packet, |
1513 | sizeof(e->phy_packet) + e->phy_packet.length, NULL, 0); | |
850bb6f2 SR |
1514 | client_put(e->client); |
1515 | } | |
1516 | ||
1517 | static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg) | |
1518 | { | |
1519 | struct fw_cdev_send_phy_packet *a = &arg->send_phy_packet; | |
1520 | struct fw_card *card = client->device->card; | |
1521 | struct outbound_phy_packet_event *e; | |
1522 | ||
1523 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1524 | if (!client->device->is_local) | |
1525 | return -ENOSYS; | |
1526 | ||
cc550216 | 1527 | e = kzalloc(sizeof(*e) + 4, GFP_KERNEL); |
850bb6f2 SR |
1528 | if (e == NULL) |
1529 | return -ENOMEM; | |
1530 | ||
1531 | client_get(client); | |
1532 | e->client = client; | |
1533 | e->p.speed = SCODE_100; | |
1534 | e->p.generation = a->generation; | |
5b06db16 CL |
1535 | e->p.header[0] = TCODE_LINK_INTERNAL << 4; |
1536 | e->p.header[1] = a->data[0]; | |
1537 | e->p.header[2] = a->data[1]; | |
1538 | e->p.header_length = 12; | |
850bb6f2 SR |
1539 | e->p.callback = outbound_phy_packet_callback; |
1540 | e->phy_packet.closure = a->closure; | |
1541 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_SENT; | |
cc550216 SR |
1542 | if (is_ping_packet(a->data)) |
1543 | e->phy_packet.length = 4; | |
850bb6f2 SR |
1544 | |
1545 | card->driver->send_request(card, &e->p); | |
1546 | ||
1547 | return 0; | |
1548 | } | |
1549 | ||
bf54e146 SR |
1550 | static int ioctl_receive_phy_packets(struct client *client, union ioctl_arg *arg) |
1551 | { | |
1552 | struct fw_cdev_receive_phy_packets *a = &arg->receive_phy_packets; | |
1553 | struct fw_card *card = client->device->card; | |
1554 | ||
1555 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1556 | if (!client->device->is_local) | |
1557 | return -ENOSYS; | |
1558 | ||
1559 | spin_lock_irq(&card->lock); | |
1560 | ||
1561 | list_move_tail(&client->phy_receiver_link, &card->phy_receiver_list); | |
1562 | client->phy_receiver_closure = a->closure; | |
1563 | ||
1564 | spin_unlock_irq(&card->lock); | |
1565 | ||
1566 | return 0; | |
1567 | } | |
1568 | ||
1569 | void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p) | |
1570 | { | |
1571 | struct client *client; | |
1572 | struct inbound_phy_packet_event *e; | |
1573 | unsigned long flags; | |
1574 | ||
1575 | spin_lock_irqsave(&card->lock, flags); | |
1576 | ||
1577 | list_for_each_entry(client, &card->phy_receiver_list, phy_receiver_link) { | |
1578 | e = kmalloc(sizeof(*e) + 8, GFP_ATOMIC); | |
cfb0c9d1 | 1579 | if (e == NULL) |
bf54e146 | 1580 | break; |
cfb0c9d1 | 1581 | |
bf54e146 SR |
1582 | e->phy_packet.closure = client->phy_receiver_closure; |
1583 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_RECEIVED; | |
1584 | e->phy_packet.rcode = RCODE_COMPLETE; | |
1585 | e->phy_packet.length = 8; | |
1586 | e->phy_packet.data[0] = p->header[1]; | |
1587 | e->phy_packet.data[1] = p->header[2]; | |
1588 | queue_event(client, &e->event, | |
1589 | &e->phy_packet, sizeof(e->phy_packet) + 8, NULL, 0); | |
1590 | } | |
1591 | ||
1592 | spin_unlock_irqrestore(&card->lock, flags); | |
1593 | } | |
1594 | ||
6e95dea7 | 1595 | static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = { |
b9dc61cf SR |
1596 | [0x00] = ioctl_get_info, |
1597 | [0x01] = ioctl_send_request, | |
1598 | [0x02] = ioctl_allocate, | |
1599 | [0x03] = ioctl_deallocate, | |
1600 | [0x04] = ioctl_send_response, | |
1601 | [0x05] = ioctl_initiate_bus_reset, | |
1602 | [0x06] = ioctl_add_descriptor, | |
1603 | [0x07] = ioctl_remove_descriptor, | |
1604 | [0x08] = ioctl_create_iso_context, | |
1605 | [0x09] = ioctl_queue_iso, | |
1606 | [0x0a] = ioctl_start_iso, | |
1607 | [0x0b] = ioctl_stop_iso, | |
1608 | [0x0c] = ioctl_get_cycle_timer, | |
1609 | [0x0d] = ioctl_allocate_iso_resource, | |
1610 | [0x0e] = ioctl_deallocate_iso_resource, | |
1611 | [0x0f] = ioctl_allocate_iso_resource_once, | |
1612 | [0x10] = ioctl_deallocate_iso_resource_once, | |
1613 | [0x11] = ioctl_get_speed, | |
1614 | [0x12] = ioctl_send_broadcast_request, | |
1615 | [0x13] = ioctl_send_stream_packet, | |
1616 | [0x14] = ioctl_get_cycle_timer2, | |
850bb6f2 | 1617 | [0x15] = ioctl_send_phy_packet, |
bf54e146 | 1618 | [0x16] = ioctl_receive_phy_packets, |
872e330e | 1619 | [0x17] = ioctl_set_iso_channels, |
d1bbd209 | 1620 | [0x18] = ioctl_flush_iso, |
4f259223 KH |
1621 | }; |
1622 | ||
53dca511 SR |
1623 | static int dispatch_ioctl(struct client *client, |
1624 | unsigned int cmd, void __user *arg) | |
19a15b93 | 1625 | { |
6e95dea7 | 1626 | union ioctl_arg buffer; |
2dbd7d7e | 1627 | int ret; |
4f259223 | 1628 | |
64582298 SR |
1629 | if (fw_device_is_shutdown(client->device)) |
1630 | return -ENODEV; | |
1631 | ||
4f259223 | 1632 | if (_IOC_TYPE(cmd) != '#' || |
9cac00b8 SR |
1633 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) || |
1634 | _IOC_SIZE(cmd) > sizeof(buffer)) | |
d873d794 | 1635 | return -ENOTTY; |
4f259223 | 1636 | |
9cac00b8 SR |
1637 | if (_IOC_DIR(cmd) == _IOC_READ) |
1638 | memset(&buffer, 0, _IOC_SIZE(cmd)); | |
1639 | ||
1640 | if (_IOC_DIR(cmd) & _IOC_WRITE) | |
1641 | if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd))) | |
4f259223 | 1642 | return -EFAULT; |
4f259223 | 1643 | |
6e95dea7 | 1644 | ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer); |
2dbd7d7e SR |
1645 | if (ret < 0) |
1646 | return ret; | |
4f259223 | 1647 | |
9cac00b8 SR |
1648 | if (_IOC_DIR(cmd) & _IOC_READ) |
1649 | if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd))) | |
4f259223 | 1650 | return -EFAULT; |
4f259223 | 1651 | |
2dbd7d7e | 1652 | return ret; |
19a15b93 KH |
1653 | } |
1654 | ||
53dca511 SR |
1655 | static long fw_device_op_ioctl(struct file *file, |
1656 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1657 | { |
64582298 | 1658 | return dispatch_ioctl(file->private_data, cmd, (void __user *)arg); |
19a15b93 KH |
1659 | } |
1660 | ||
1661 | #ifdef CONFIG_COMPAT | |
53dca511 SR |
1662 | static long fw_device_op_compat_ioctl(struct file *file, |
1663 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1664 | { |
64582298 | 1665 | return dispatch_ioctl(file->private_data, cmd, compat_ptr(arg)); |
19a15b93 KH |
1666 | } |
1667 | #endif | |
1668 | ||
1669 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
1670 | { | |
1671 | struct client *client = file->private_data; | |
9aad8125 | 1672 | unsigned long size; |
2dbd7d7e | 1673 | int page_count, ret; |
9aad8125 | 1674 | |
551f4cb9 JF |
1675 | if (fw_device_is_shutdown(client->device)) |
1676 | return -ENODEV; | |
1677 | ||
9aad8125 KH |
1678 | /* FIXME: We could support multiple buffers, but we don't. */ |
1679 | if (client->buffer.pages != NULL) | |
1680 | return -EBUSY; | |
1681 | ||
1682 | if (!(vma->vm_flags & VM_SHARED)) | |
1683 | return -EINVAL; | |
19a15b93 | 1684 | |
9aad8125 | 1685 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
1686 | return -EINVAL; |
1687 | ||
1688 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
1689 | size = vma->vm_end - vma->vm_start; |
1690 | page_count = size >> PAGE_SHIFT; | |
1691 | if (size & ~PAGE_MASK) | |
1692 | return -EINVAL; | |
1693 | ||
0b6c4857 | 1694 | ret = fw_iso_buffer_alloc(&client->buffer, page_count); |
2dbd7d7e SR |
1695 | if (ret < 0) |
1696 | return ret; | |
19a15b93 | 1697 | |
0b6c4857 SR |
1698 | spin_lock_irq(&client->lock); |
1699 | if (client->iso_context) { | |
1700 | ret = fw_iso_buffer_map_dma(&client->buffer, | |
1701 | client->device->card, | |
1702 | iso_dma_direction(client->iso_context)); | |
1703 | client->buffer_is_mapped = (ret == 0); | |
1704 | } | |
1705 | spin_unlock_irq(&client->lock); | |
2dbd7d7e | 1706 | if (ret < 0) |
0b6c4857 | 1707 | goto fail; |
9aad8125 | 1708 | |
0b6c4857 SR |
1709 | ret = fw_iso_buffer_map_vma(&client->buffer, vma); |
1710 | if (ret < 0) | |
1711 | goto fail; | |
1712 | ||
1713 | return 0; | |
1714 | fail: | |
1715 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
2dbd7d7e | 1716 | return ret; |
19a15b93 KH |
1717 | } |
1718 | ||
5a5e62da CL |
1719 | static int is_outbound_transaction_resource(int id, void *p, void *data) |
1720 | { | |
1721 | struct client_resource *resource = p; | |
1722 | ||
1723 | return resource->release == release_transaction; | |
1724 | } | |
1725 | ||
1726 | static int has_outbound_transactions(struct client *client) | |
1727 | { | |
1728 | int ret; | |
1729 | ||
1730 | spin_lock_irq(&client->lock); | |
1731 | ret = idr_for_each(&client->resource_idr, | |
1732 | is_outbound_transaction_resource, NULL); | |
1733 | spin_unlock_irq(&client->lock); | |
1734 | ||
1735 | return ret; | |
1736 | } | |
1737 | ||
45ee3199 JF |
1738 | static int shutdown_resource(int id, void *p, void *data) |
1739 | { | |
e21fcf79 | 1740 | struct client_resource *resource = p; |
45ee3199 JF |
1741 | struct client *client = data; |
1742 | ||
e21fcf79 | 1743 | resource->release(client, resource); |
fb443036 | 1744 | client_put(client); |
45ee3199 JF |
1745 | |
1746 | return 0; | |
1747 | } | |
1748 | ||
19a15b93 KH |
1749 | static int fw_device_op_release(struct inode *inode, struct file *file) |
1750 | { | |
1751 | struct client *client = file->private_data; | |
e21fcf79 | 1752 | struct event *event, *next_event; |
19a15b93 | 1753 | |
bf54e146 SR |
1754 | spin_lock_irq(&client->device->card->lock); |
1755 | list_del(&client->phy_receiver_link); | |
1756 | spin_unlock_irq(&client->device->card->lock); | |
1757 | ||
97811e34 SR |
1758 | mutex_lock(&client->device->client_list_mutex); |
1759 | list_del(&client->link); | |
1760 | mutex_unlock(&client->device->client_list_mutex); | |
1761 | ||
19a15b93 KH |
1762 | if (client->iso_context) |
1763 | fw_iso_context_destroy(client->iso_context); | |
1764 | ||
36a755cf SR |
1765 | if (client->buffer.pages) |
1766 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
1767 | ||
45ee3199 | 1768 | /* Freeze client->resource_idr and client->event_list */ |
3ba94986 | 1769 | spin_lock_irq(&client->lock); |
45ee3199 | 1770 | client->in_shutdown = true; |
3ba94986 | 1771 | spin_unlock_irq(&client->lock); |
66dea3e5 | 1772 | |
5a5e62da CL |
1773 | wait_event(client->tx_flush_wait, !has_outbound_transactions(client)); |
1774 | ||
45ee3199 | 1775 | idr_for_each(&client->resource_idr, shutdown_resource, client); |
45ee3199 | 1776 | idr_destroy(&client->resource_idr); |
28cf6a04 | 1777 | |
e21fcf79 SR |
1778 | list_for_each_entry_safe(event, next_event, &client->event_list, link) |
1779 | kfree(event); | |
19a15b93 | 1780 | |
fb443036 | 1781 | client_put(client); |
19a15b93 KH |
1782 | |
1783 | return 0; | |
1784 | } | |
1785 | ||
1786 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
1787 | { | |
1788 | struct client *client = file->private_data; | |
2603bf21 | 1789 | unsigned int mask = 0; |
19a15b93 KH |
1790 | |
1791 | poll_wait(file, &client->wait, pt); | |
1792 | ||
2603bf21 KH |
1793 | if (fw_device_is_shutdown(client->device)) |
1794 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 1795 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
1796 | mask |= POLLIN | POLLRDNORM; |
1797 | ||
1798 | return mask; | |
19a15b93 KH |
1799 | } |
1800 | ||
21ebcd12 | 1801 | const struct file_operations fw_device_ops = { |
19a15b93 | 1802 | .owner = THIS_MODULE, |
3ac26b2e | 1803 | .llseek = no_llseek, |
19a15b93 KH |
1804 | .open = fw_device_op_open, |
1805 | .read = fw_device_op_read, | |
1806 | .unlocked_ioctl = fw_device_op_ioctl, | |
19a15b93 | 1807 | .mmap = fw_device_op_mmap, |
3ac26b2e SR |
1808 | .release = fw_device_op_release, |
1809 | .poll = fw_device_op_poll, | |
19a15b93 | 1810 | #ifdef CONFIG_COMPAT |
5af4e5ea | 1811 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
1812 | #endif |
1813 | }; |