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> |
ae2a9766 | 37 | #include <linux/sched.h> /* required for linux/wait.h */ |
5a0e3ad6 | 38 | #include <linux/slab.h> |
cf417e54 | 39 | #include <linux/spinlock.h> |
281e2032 | 40 | #include <linux/string.h> |
be5bbd67 | 41 | #include <linux/time.h> |
e034d242 | 42 | #include <linux/uaccess.h> |
be5bbd67 SR |
43 | #include <linux/vmalloc.h> |
44 | #include <linux/wait.h> | |
b1bda4cd | 45 | #include <linux/workqueue.h> |
be5bbd67 | 46 | |
a64408b9 | 47 | #include <asm/system.h> |
be5bbd67 | 48 | |
77c9a5da | 49 | #include "core.h" |
19a15b93 | 50 | |
604f4516 SR |
51 | /* |
52 | * ABI version history is documented in linux/firewire-cdev.h. | |
53 | */ | |
8e2b2b46 SR |
54 | #define FW_CDEV_KERNEL_VERSION 4 |
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; | |
97bd9efa | 74 | |
bf54e146 SR |
75 | struct list_head phy_receiver_link; |
76 | u64 phy_receiver_closure; | |
77 | ||
97bd9efa | 78 | struct list_head link; |
fb443036 | 79 | struct kref kref; |
19a15b93 KH |
80 | }; |
81 | ||
fb443036 SR |
82 | static inline void client_get(struct client *client) |
83 | { | |
84 | kref_get(&client->kref); | |
85 | } | |
86 | ||
87 | static void client_release(struct kref *kref) | |
88 | { | |
89 | struct client *client = container_of(kref, struct client, kref); | |
90 | ||
91 | fw_device_put(client->device); | |
92 | kfree(client); | |
93 | } | |
94 | ||
95 | static void client_put(struct client *client) | |
96 | { | |
97 | kref_put(&client->kref, client_release); | |
98 | } | |
99 | ||
97c18b7f SR |
100 | struct client_resource; |
101 | typedef void (*client_resource_release_fn_t)(struct client *, | |
102 | struct client_resource *); | |
103 | struct client_resource { | |
104 | client_resource_release_fn_t release; | |
105 | int handle; | |
106 | }; | |
107 | ||
108 | struct address_handler_resource { | |
109 | struct client_resource resource; | |
110 | struct fw_address_handler handler; | |
111 | __u64 closure; | |
112 | struct client *client; | |
113 | }; | |
114 | ||
115 | struct outbound_transaction_resource { | |
116 | struct client_resource resource; | |
117 | struct fw_transaction transaction; | |
118 | }; | |
119 | ||
120 | struct inbound_transaction_resource { | |
121 | struct client_resource resource; | |
08bd34c9 | 122 | struct fw_card *card; |
97c18b7f SR |
123 | struct fw_request *request; |
124 | void *data; | |
125 | size_t length; | |
126 | }; | |
127 | ||
128 | struct descriptor_resource { | |
129 | struct client_resource resource; | |
130 | struct fw_descriptor descriptor; | |
131 | u32 data[0]; | |
132 | }; | |
133 | ||
b1bda4cd JFSR |
134 | struct iso_resource { |
135 | struct client_resource resource; | |
136 | struct client *client; | |
137 | /* Schedule work and access todo only with client->lock held. */ | |
138 | struct delayed_work work; | |
1ec3c026 SR |
139 | enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC, |
140 | ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo; | |
b1bda4cd JFSR |
141 | int generation; |
142 | u64 channels; | |
143 | s32 bandwidth; | |
6fdc0370 | 144 | __be32 transaction_data[2]; |
b1bda4cd JFSR |
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); | |
153 | if (!schedule_delayed_work(&r->work, delay)) | |
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 | ||
53dca511 | 220 | static inline void __user *u64_to_uptr(__u64 value) |
19a15b93 KH |
221 | { |
222 | return (void __user *)(unsigned long)value; | |
223 | } | |
224 | ||
53dca511 | 225 | static inline __u64 uptr_to_u64(void __user *ptr) |
19a15b93 KH |
226 | { |
227 | return (__u64)(unsigned long)ptr; | |
228 | } | |
229 | ||
230 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
231 | { | |
232 | struct fw_device *device; | |
233 | struct client *client; | |
234 | ||
96b19062 | 235 | device = fw_device_get_by_devt(inode->i_rdev); |
a3aca3da KH |
236 | if (device == NULL) |
237 | return -ENODEV; | |
19a15b93 | 238 | |
551f4cb9 JF |
239 | if (fw_device_is_shutdown(device)) { |
240 | fw_device_put(device); | |
241 | return -ENODEV; | |
242 | } | |
243 | ||
2d826cc5 | 244 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
96b19062 SR |
245 | if (client == NULL) { |
246 | fw_device_put(device); | |
19a15b93 | 247 | return -ENOMEM; |
96b19062 | 248 | } |
19a15b93 | 249 | |
96b19062 | 250 | client->device = device; |
19a15b93 | 251 | spin_lock_init(&client->lock); |
45ee3199 JF |
252 | idr_init(&client->resource_idr); |
253 | INIT_LIST_HEAD(&client->event_list); | |
19a15b93 | 254 | init_waitqueue_head(&client->wait); |
5a5e62da | 255 | init_waitqueue_head(&client->tx_flush_wait); |
bf54e146 | 256 | INIT_LIST_HEAD(&client->phy_receiver_link); |
fb443036 | 257 | kref_init(&client->kref); |
19a15b93 KH |
258 | |
259 | file->private_data = client; | |
260 | ||
d67cfb96 | 261 | mutex_lock(&device->client_list_mutex); |
97bd9efa | 262 | list_add_tail(&client->link, &device->client_list); |
d67cfb96 | 263 | mutex_unlock(&device->client_list_mutex); |
97bd9efa | 264 | |
3ac26b2e | 265 | return nonseekable_open(inode, file); |
19a15b93 KH |
266 | } |
267 | ||
268 | static void queue_event(struct client *client, struct event *event, | |
269 | void *data0, size_t size0, void *data1, size_t size1) | |
270 | { | |
271 | unsigned long flags; | |
272 | ||
273 | event->v[0].data = data0; | |
274 | event->v[0].size = size0; | |
275 | event->v[1].data = data1; | |
276 | event->v[1].size = size1; | |
277 | ||
278 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
279 | if (client->in_shutdown) |
280 | kfree(event); | |
281 | else | |
282 | list_add_tail(&event->link, &client->event_list); | |
19a15b93 | 283 | spin_unlock_irqrestore(&client->lock, flags); |
83431cba JF |
284 | |
285 | wake_up_interruptible(&client->wait); | |
19a15b93 KH |
286 | } |
287 | ||
53dca511 SR |
288 | static int dequeue_event(struct client *client, |
289 | char __user *buffer, size_t count) | |
19a15b93 | 290 | { |
19a15b93 KH |
291 | struct event *event; |
292 | size_t size, total; | |
2dbd7d7e | 293 | int i, ret; |
19a15b93 | 294 | |
2dbd7d7e SR |
295 | ret = wait_event_interruptible(client->wait, |
296 | !list_empty(&client->event_list) || | |
297 | fw_device_is_shutdown(client->device)); | |
298 | if (ret < 0) | |
299 | return ret; | |
19a15b93 | 300 | |
2603bf21 KH |
301 | if (list_empty(&client->event_list) && |
302 | fw_device_is_shutdown(client->device)) | |
303 | return -ENODEV; | |
19a15b93 | 304 | |
3ba94986 | 305 | spin_lock_irq(&client->lock); |
a459b8ab | 306 | event = list_first_entry(&client->event_list, struct event, link); |
19a15b93 | 307 | list_del(&event->link); |
3ba94986 | 308 | spin_unlock_irq(&client->lock); |
19a15b93 | 309 | |
19a15b93 KH |
310 | total = 0; |
311 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
312 | size = min(event->v[i].size, count - total); | |
2603bf21 | 313 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
2dbd7d7e | 314 | ret = -EFAULT; |
19a15b93 | 315 | goto out; |
2603bf21 | 316 | } |
19a15b93 KH |
317 | total += size; |
318 | } | |
2dbd7d7e | 319 | ret = total; |
19a15b93 KH |
320 | |
321 | out: | |
322 | kfree(event); | |
323 | ||
2dbd7d7e | 324 | return ret; |
19a15b93 KH |
325 | } |
326 | ||
53dca511 SR |
327 | static ssize_t fw_device_op_read(struct file *file, char __user *buffer, |
328 | size_t count, loff_t *offset) | |
19a15b93 KH |
329 | { |
330 | struct client *client = file->private_data; | |
331 | ||
332 | return dequeue_event(client, buffer, count); | |
333 | } | |
334 | ||
53dca511 SR |
335 | static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, |
336 | struct client *client) | |
344bbc4d | 337 | { |
da8ecffa | 338 | struct fw_card *card = client->device->card; |
cf417e54 | 339 | |
3ba94986 | 340 | spin_lock_irq(&card->lock); |
344bbc4d | 341 | |
da8ecffa | 342 | event->closure = client->bus_reset_closure; |
344bbc4d | 343 | event->type = FW_CDEV_EVENT_BUS_RESET; |
cf5a56ac | 344 | event->generation = client->device->generation; |
da8ecffa | 345 | event->node_id = client->device->node_id; |
344bbc4d | 346 | event->local_node_id = card->local_node->node_id; |
250b2b6d | 347 | event->bm_node_id = card->bm_node_id; |
344bbc4d KH |
348 | event->irm_node_id = card->irm_node->node_id; |
349 | event->root_node_id = card->root_node->node_id; | |
cf417e54 | 350 | |
3ba94986 | 351 | spin_unlock_irq(&card->lock); |
344bbc4d KH |
352 | } |
353 | ||
53dca511 SR |
354 | static void for_each_client(struct fw_device *device, |
355 | void (*callback)(struct client *client)) | |
2603bf21 | 356 | { |
2603bf21 | 357 | struct client *c; |
2603bf21 | 358 | |
d67cfb96 | 359 | mutex_lock(&device->client_list_mutex); |
2603bf21 KH |
360 | list_for_each_entry(c, &device->client_list, link) |
361 | callback(c); | |
d67cfb96 | 362 | mutex_unlock(&device->client_list_mutex); |
2603bf21 KH |
363 | } |
364 | ||
b1bda4cd JFSR |
365 | static int schedule_reallocations(int id, void *p, void *data) |
366 | { | |
9fb551bf | 367 | schedule_if_iso_resource(p); |
b1bda4cd | 368 | |
b1bda4cd JFSR |
369 | return 0; |
370 | } | |
371 | ||
53dca511 | 372 | static void queue_bus_reset_event(struct client *client) |
97bd9efa | 373 | { |
97c18b7f | 374 | struct bus_reset_event *e; |
97bd9efa | 375 | |
97c18b7f SR |
376 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
377 | if (e == NULL) { | |
bf54e146 | 378 | fw_notify("Out of memory when allocating event\n"); |
97bd9efa KH |
379 | return; |
380 | } | |
381 | ||
97c18b7f | 382 | fill_bus_reset_event(&e->reset, client); |
97bd9efa | 383 | |
97c18b7f SR |
384 | queue_event(client, &e->event, |
385 | &e->reset, sizeof(e->reset), NULL, 0); | |
b1bda4cd JFSR |
386 | |
387 | spin_lock_irq(&client->lock); | |
388 | idr_for_each(&client->resource_idr, schedule_reallocations, client); | |
389 | spin_unlock_irq(&client->lock); | |
97bd9efa KH |
390 | } |
391 | ||
392 | void fw_device_cdev_update(struct fw_device *device) | |
393 | { | |
2603bf21 KH |
394 | for_each_client(device, queue_bus_reset_event); |
395 | } | |
97bd9efa | 396 | |
2603bf21 KH |
397 | static void wake_up_client(struct client *client) |
398 | { | |
399 | wake_up_interruptible(&client->wait); | |
400 | } | |
97bd9efa | 401 | |
2603bf21 KH |
402 | void fw_device_cdev_remove(struct fw_device *device) |
403 | { | |
404 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
405 | } |
406 | ||
6e95dea7 SR |
407 | union ioctl_arg { |
408 | struct fw_cdev_get_info get_info; | |
409 | struct fw_cdev_send_request send_request; | |
410 | struct fw_cdev_allocate allocate; | |
411 | struct fw_cdev_deallocate deallocate; | |
412 | struct fw_cdev_send_response send_response; | |
413 | struct fw_cdev_initiate_bus_reset initiate_bus_reset; | |
414 | struct fw_cdev_add_descriptor add_descriptor; | |
415 | struct fw_cdev_remove_descriptor remove_descriptor; | |
416 | struct fw_cdev_create_iso_context create_iso_context; | |
417 | struct fw_cdev_queue_iso queue_iso; | |
418 | struct fw_cdev_start_iso start_iso; | |
419 | struct fw_cdev_stop_iso stop_iso; | |
420 | struct fw_cdev_get_cycle_timer get_cycle_timer; | |
421 | struct fw_cdev_allocate_iso_resource allocate_iso_resource; | |
422 | struct fw_cdev_send_stream_packet send_stream_packet; | |
423 | struct fw_cdev_get_cycle_timer2 get_cycle_timer2; | |
850bb6f2 | 424 | struct fw_cdev_send_phy_packet send_phy_packet; |
bf54e146 | 425 | struct fw_cdev_receive_phy_packets receive_phy_packets; |
872e330e | 426 | struct fw_cdev_set_iso_channels set_iso_channels; |
6e95dea7 SR |
427 | }; |
428 | ||
429 | static int ioctl_get_info(struct client *client, union ioctl_arg *arg) | |
19a15b93 | 430 | { |
6e95dea7 | 431 | struct fw_cdev_get_info *a = &arg->get_info; |
344bbc4d | 432 | struct fw_cdev_event_bus_reset bus_reset; |
c9755e14 | 433 | unsigned long ret = 0; |
344bbc4d | 434 | |
6e95dea7 | 435 | client->version = a->version; |
604f4516 | 436 | a->version = FW_CDEV_KERNEL_VERSION; |
6e95dea7 | 437 | a->card = client->device->card->index; |
344bbc4d | 438 | |
c9755e14 SR |
439 | down_read(&fw_device_rwsem); |
440 | ||
6e95dea7 SR |
441 | if (a->rom != 0) { |
442 | size_t want = a->rom_length; | |
d84702a5 | 443 | size_t have = client->device->config_rom_length * 4; |
344bbc4d | 444 | |
6e95dea7 SR |
445 | ret = copy_to_user(u64_to_uptr(a->rom), |
446 | client->device->config_rom, min(want, have)); | |
344bbc4d | 447 | } |
6e95dea7 | 448 | a->rom_length = client->device->config_rom_length * 4; |
344bbc4d | 449 | |
c9755e14 SR |
450 | up_read(&fw_device_rwsem); |
451 | ||
452 | if (ret != 0) | |
453 | return -EFAULT; | |
454 | ||
6e95dea7 SR |
455 | client->bus_reset_closure = a->bus_reset_closure; |
456 | if (a->bus_reset != 0) { | |
da8ecffa | 457 | fill_bus_reset_event(&bus_reset, client); |
6e95dea7 SR |
458 | if (copy_to_user(u64_to_uptr(a->bus_reset), |
459 | &bus_reset, sizeof(bus_reset))) | |
344bbc4d KH |
460 | return -EFAULT; |
461 | } | |
19a15b93 | 462 | |
19a15b93 KH |
463 | return 0; |
464 | } | |
465 | ||
53dca511 SR |
466 | static int add_client_resource(struct client *client, |
467 | struct client_resource *resource, gfp_t gfp_mask) | |
3964a449 KH |
468 | { |
469 | unsigned long flags; | |
45ee3199 JF |
470 | int ret; |
471 | ||
472 | retry: | |
473 | if (idr_pre_get(&client->resource_idr, gfp_mask) == 0) | |
474 | return -ENOMEM; | |
3964a449 KH |
475 | |
476 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
477 | if (client->in_shutdown) |
478 | ret = -ECANCELED; | |
479 | else | |
480 | ret = idr_get_new(&client->resource_idr, resource, | |
481 | &resource->handle); | |
b1bda4cd | 482 | if (ret >= 0) { |
fb443036 | 483 | client_get(client); |
9fb551bf | 484 | schedule_if_iso_resource(resource); |
b1bda4cd | 485 | } |
3964a449 | 486 | spin_unlock_irqrestore(&client->lock, flags); |
45ee3199 JF |
487 | |
488 | if (ret == -EAGAIN) | |
489 | goto retry; | |
490 | ||
491 | return ret < 0 ? ret : 0; | |
3964a449 KH |
492 | } |
493 | ||
53dca511 SR |
494 | static int release_client_resource(struct client *client, u32 handle, |
495 | client_resource_release_fn_t release, | |
e21fcf79 | 496 | struct client_resource **return_resource) |
3964a449 | 497 | { |
e21fcf79 | 498 | struct client_resource *resource; |
3964a449 | 499 | |
3ba94986 | 500 | spin_lock_irq(&client->lock); |
45ee3199 | 501 | if (client->in_shutdown) |
e21fcf79 | 502 | resource = NULL; |
45ee3199 | 503 | else |
e21fcf79 SR |
504 | resource = idr_find(&client->resource_idr, handle); |
505 | if (resource && resource->release == release) | |
45ee3199 | 506 | idr_remove(&client->resource_idr, handle); |
3ba94986 | 507 | spin_unlock_irq(&client->lock); |
3964a449 | 508 | |
e21fcf79 | 509 | if (!(resource && resource->release == release)) |
3964a449 KH |
510 | return -EINVAL; |
511 | ||
e21fcf79 SR |
512 | if (return_resource) |
513 | *return_resource = resource; | |
3964a449 | 514 | else |
e21fcf79 | 515 | resource->release(client, resource); |
3964a449 | 516 | |
fb443036 SR |
517 | client_put(client); |
518 | ||
3964a449 KH |
519 | return 0; |
520 | } | |
521 | ||
53dca511 SR |
522 | static void release_transaction(struct client *client, |
523 | struct client_resource *resource) | |
3964a449 | 524 | { |
3964a449 KH |
525 | } |
526 | ||
53dca511 SR |
527 | static void complete_transaction(struct fw_card *card, int rcode, |
528 | void *payload, size_t length, void *data) | |
19a15b93 | 529 | { |
97c18b7f SR |
530 | struct outbound_transaction_event *e = data; |
531 | struct fw_cdev_event_response *rsp = &e->response; | |
532 | struct client *client = e->client; | |
28cf6a04 | 533 | unsigned long flags; |
19a15b93 | 534 | |
97c18b7f SR |
535 | if (length < rsp->length) |
536 | rsp->length = length; | |
19a15b93 | 537 | if (rcode == RCODE_COMPLETE) |
97c18b7f | 538 | memcpy(rsp->data, payload, rsp->length); |
19a15b93 | 539 | |
28cf6a04 | 540 | spin_lock_irqsave(&client->lock, flags); |
5a5e62da CL |
541 | idr_remove(&client->resource_idr, e->r.resource.handle); |
542 | if (client->in_shutdown) | |
543 | wake_up(&client->tx_flush_wait); | |
28cf6a04 KH |
544 | spin_unlock_irqrestore(&client->lock, flags); |
545 | ||
97c18b7f SR |
546 | rsp->type = FW_CDEV_EVENT_RESPONSE; |
547 | rsp->rcode = rcode; | |
8401d92b DM |
548 | |
549 | /* | |
97c18b7f | 550 | * In the case that sizeof(*rsp) doesn't align with the position of the |
8401d92b DM |
551 | * data, and the read is short, preserve an extra copy of the data |
552 | * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless | |
553 | * for short reads and some apps depended on it, this is both safe | |
554 | * and prudent for compatibility. | |
555 | */ | |
97c18b7f SR |
556 | if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data)) |
557 | queue_event(client, &e->event, rsp, sizeof(*rsp), | |
558 | rsp->data, rsp->length); | |
8401d92b | 559 | else |
97c18b7f | 560 | queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length, |
8401d92b | 561 | NULL, 0); |
fb443036 | 562 | |
5a5e62da CL |
563 | /* Drop the idr's reference */ |
564 | client_put(client); | |
19a15b93 KH |
565 | } |
566 | ||
acfe8333 JFSR |
567 | static int init_request(struct client *client, |
568 | struct fw_cdev_send_request *request, | |
569 | int destination_id, int speed) | |
19a15b93 | 570 | { |
97c18b7f | 571 | struct outbound_transaction_event *e; |
1f3125af | 572 | int ret; |
19a15b93 | 573 | |
18e9b10f SR |
574 | if (request->tcode != TCODE_STREAM_DATA && |
575 | (request->length > 4096 || request->length > 512 << speed)) | |
5d3fd692 | 576 | return -EIO; |
19a15b93 | 577 | |
a8e93f3d CL |
578 | if (request->tcode == TCODE_WRITE_QUADLET_REQUEST && |
579 | request->length < 4) | |
580 | return -EINVAL; | |
581 | ||
97c18b7f SR |
582 | e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL); |
583 | if (e == NULL) | |
19a15b93 KH |
584 | return -ENOMEM; |
585 | ||
97c18b7f SR |
586 | e->client = client; |
587 | e->response.length = request->length; | |
588 | e->response.closure = request->closure; | |
19a15b93 | 589 | |
4f259223 | 590 | if (request->data && |
97c18b7f | 591 | copy_from_user(e->response.data, |
4f259223 | 592 | u64_to_uptr(request->data), request->length)) { |
1f3125af | 593 | ret = -EFAULT; |
45ee3199 | 594 | goto failed; |
1f3125af SR |
595 | } |
596 | ||
97c18b7f SR |
597 | e->r.resource.release = release_transaction; |
598 | ret = add_client_resource(client, &e->r.resource, GFP_KERNEL); | |
45ee3199 JF |
599 | if (ret < 0) |
600 | goto failed; | |
28cf6a04 | 601 | |
acfe8333 | 602 | fw_send_request(client->device->card, &e->r.transaction, |
664d8010 SR |
603 | request->tcode, destination_id, request->generation, |
604 | speed, request->offset, e->response.data, | |
605 | request->length, complete_transaction, e); | |
606 | return 0; | |
19a15b93 | 607 | |
45ee3199 | 608 | failed: |
97c18b7f | 609 | kfree(e); |
1f3125af SR |
610 | |
611 | return ret; | |
19a15b93 KH |
612 | } |
613 | ||
6e95dea7 | 614 | static int ioctl_send_request(struct client *client, union ioctl_arg *arg) |
acfe8333 | 615 | { |
6e95dea7 | 616 | switch (arg->send_request.tcode) { |
acfe8333 JFSR |
617 | case TCODE_WRITE_QUADLET_REQUEST: |
618 | case TCODE_WRITE_BLOCK_REQUEST: | |
619 | case TCODE_READ_QUADLET_REQUEST: | |
620 | case TCODE_READ_BLOCK_REQUEST: | |
621 | case TCODE_LOCK_MASK_SWAP: | |
622 | case TCODE_LOCK_COMPARE_SWAP: | |
623 | case TCODE_LOCK_FETCH_ADD: | |
624 | case TCODE_LOCK_LITTLE_ADD: | |
625 | case TCODE_LOCK_BOUNDED_ADD: | |
626 | case TCODE_LOCK_WRAP_ADD: | |
627 | case TCODE_LOCK_VENDOR_DEPENDENT: | |
628 | break; | |
629 | default: | |
630 | return -EINVAL; | |
631 | } | |
632 | ||
6e95dea7 | 633 | return init_request(client, &arg->send_request, client->device->node_id, |
acfe8333 JFSR |
634 | client->device->max_speed); |
635 | } | |
636 | ||
281e2032 SR |
637 | static inline bool is_fcp_request(struct fw_request *request) |
638 | { | |
639 | return request == NULL; | |
640 | } | |
641 | ||
53dca511 SR |
642 | static void release_request(struct client *client, |
643 | struct client_resource *resource) | |
3964a449 | 644 | { |
97c18b7f SR |
645 | struct inbound_transaction_resource *r = container_of(resource, |
646 | struct inbound_transaction_resource, resource); | |
3964a449 | 647 | |
281e2032 SR |
648 | if (is_fcp_request(r->request)) |
649 | kfree(r->data); | |
650 | else | |
08bd34c9 | 651 | fw_send_response(r->card, r->request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
652 | |
653 | fw_card_put(r->card); | |
97c18b7f | 654 | kfree(r); |
3964a449 KH |
655 | } |
656 | ||
97c18b7f | 657 | static void handle_request(struct fw_card *card, struct fw_request *request, |
53dca511 | 658 | int tcode, int destination, int source, |
33e553fe | 659 | int generation, unsigned long long offset, |
53dca511 | 660 | void *payload, size_t length, void *callback_data) |
19a15b93 | 661 | { |
97c18b7f SR |
662 | struct address_handler_resource *handler = callback_data; |
663 | struct inbound_transaction_resource *r; | |
664 | struct inbound_transaction_event *e; | |
e205597d | 665 | size_t event_size0; |
281e2032 | 666 | void *fcp_frame = NULL; |
45ee3199 | 667 | int ret; |
19a15b93 | 668 | |
0244f573 SR |
669 | /* card may be different from handler->client->device->card */ |
670 | fw_card_get(card); | |
671 | ||
97c18b7f | 672 | r = kmalloc(sizeof(*r), GFP_ATOMIC); |
2d826cc5 | 673 | e = kmalloc(sizeof(*e), GFP_ATOMIC); |
bf54e146 SR |
674 | if (r == NULL || e == NULL) { |
675 | fw_notify("Out of memory when allocating event\n"); | |
45ee3199 | 676 | goto failed; |
bf54e146 | 677 | } |
08bd34c9 | 678 | r->card = card; |
97c18b7f SR |
679 | r->request = request; |
680 | r->data = payload; | |
681 | r->length = length; | |
19a15b93 | 682 | |
281e2032 SR |
683 | if (is_fcp_request(request)) { |
684 | /* | |
685 | * FIXME: Let core-transaction.c manage a | |
686 | * single reference-counted copy? | |
687 | */ | |
688 | fcp_frame = kmemdup(payload, length, GFP_ATOMIC); | |
689 | if (fcp_frame == NULL) | |
690 | goto failed; | |
691 | ||
692 | r->data = fcp_frame; | |
693 | } | |
694 | ||
97c18b7f SR |
695 | r->resource.release = release_request; |
696 | ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC); | |
45ee3199 JF |
697 | if (ret < 0) |
698 | goto failed; | |
19a15b93 | 699 | |
e205597d SR |
700 | if (handler->client->version < FW_CDEV_VERSION_EVENT_REQUEST2) { |
701 | struct fw_cdev_event_request *req = &e->req.request; | |
702 | ||
703 | if (tcode & 0x10) | |
704 | tcode = TCODE_LOCK_REQUEST; | |
705 | ||
706 | req->type = FW_CDEV_EVENT_REQUEST; | |
707 | req->tcode = tcode; | |
708 | req->offset = offset; | |
709 | req->length = length; | |
710 | req->handle = r->resource.handle; | |
711 | req->closure = handler->closure; | |
712 | event_size0 = sizeof(*req); | |
713 | } else { | |
714 | struct fw_cdev_event_request2 *req = &e->req.request2; | |
715 | ||
716 | req->type = FW_CDEV_EVENT_REQUEST2; | |
717 | req->tcode = tcode; | |
718 | req->offset = offset; | |
719 | req->source_node_id = source; | |
720 | req->destination_node_id = destination; | |
721 | req->card = card->index; | |
722 | req->generation = generation; | |
723 | req->length = length; | |
724 | req->handle = r->resource.handle; | |
725 | req->closure = handler->closure; | |
726 | event_size0 = sizeof(*req); | |
727 | } | |
19a15b93 | 728 | |
97c18b7f | 729 | queue_event(handler->client, &e->event, |
e205597d | 730 | &e->req, event_size0, r->data, length); |
45ee3199 JF |
731 | return; |
732 | ||
733 | failed: | |
97c18b7f | 734 | kfree(r); |
45ee3199 | 735 | kfree(e); |
281e2032 SR |
736 | kfree(fcp_frame); |
737 | ||
738 | if (!is_fcp_request(request)) | |
db5d247a | 739 | fw_send_response(card, request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
740 | |
741 | fw_card_put(card); | |
19a15b93 KH |
742 | } |
743 | ||
53dca511 SR |
744 | static void release_address_handler(struct client *client, |
745 | struct client_resource *resource) | |
3964a449 | 746 | { |
97c18b7f SR |
747 | struct address_handler_resource *r = |
748 | container_of(resource, struct address_handler_resource, resource); | |
3964a449 | 749 | |
97c18b7f SR |
750 | fw_core_remove_address_handler(&r->handler); |
751 | kfree(r); | |
3964a449 KH |
752 | } |
753 | ||
6e95dea7 | 754 | static int ioctl_allocate(struct client *client, union ioctl_arg *arg) |
19a15b93 | 755 | { |
6e95dea7 | 756 | struct fw_cdev_allocate *a = &arg->allocate; |
97c18b7f | 757 | struct address_handler_resource *r; |
19a15b93 | 758 | struct fw_address_region region; |
45ee3199 | 759 | int ret; |
19a15b93 | 760 | |
97c18b7f SR |
761 | r = kmalloc(sizeof(*r), GFP_KERNEL); |
762 | if (r == NULL) | |
19a15b93 KH |
763 | return -ENOMEM; |
764 | ||
6e95dea7 | 765 | region.start = a->offset; |
8e2b2b46 SR |
766 | if (client->version < FW_CDEV_VERSION_ALLOCATE_REGION_END) |
767 | region.end = a->offset + a->length; | |
768 | else | |
769 | region.end = a->region_end; | |
770 | ||
6e95dea7 | 771 | r->handler.length = a->length; |
97c18b7f | 772 | r->handler.address_callback = handle_request; |
6e95dea7 SR |
773 | r->handler.callback_data = r; |
774 | r->closure = a->closure; | |
775 | r->client = client; | |
19a15b93 | 776 | |
97c18b7f | 777 | ret = fw_core_add_address_handler(&r->handler, ®ion); |
3e0b5f0d | 778 | if (ret < 0) { |
97c18b7f | 779 | kfree(r); |
3e0b5f0d | 780 | return ret; |
19a15b93 | 781 | } |
8e2b2b46 | 782 | a->offset = r->handler.offset; |
19a15b93 | 783 | |
97c18b7f SR |
784 | r->resource.release = release_address_handler; |
785 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 786 | if (ret < 0) { |
97c18b7f | 787 | release_address_handler(client, &r->resource); |
45ee3199 JF |
788 | return ret; |
789 | } | |
6e95dea7 | 790 | a->handle = r->resource.handle; |
19a15b93 KH |
791 | |
792 | return 0; | |
793 | } | |
794 | ||
6e95dea7 | 795 | static int ioctl_deallocate(struct client *client, union ioctl_arg *arg) |
9472316b | 796 | { |
6e95dea7 | 797 | return release_client_resource(client, arg->deallocate.handle, |
45ee3199 | 798 | release_address_handler, NULL); |
9472316b KH |
799 | } |
800 | ||
6e95dea7 | 801 | static int ioctl_send_response(struct client *client, union ioctl_arg *arg) |
19a15b93 | 802 | { |
6e95dea7 | 803 | struct fw_cdev_send_response *a = &arg->send_response; |
3964a449 | 804 | struct client_resource *resource; |
97c18b7f | 805 | struct inbound_transaction_resource *r; |
7e44c0b5 | 806 | int ret = 0; |
19a15b93 | 807 | |
6e95dea7 | 808 | if (release_client_resource(client, a->handle, |
45ee3199 | 809 | release_request, &resource) < 0) |
19a15b93 | 810 | return -EINVAL; |
45ee3199 | 811 | |
97c18b7f SR |
812 | r = container_of(resource, struct inbound_transaction_resource, |
813 | resource); | |
281e2032 SR |
814 | if (is_fcp_request(r->request)) |
815 | goto out; | |
816 | ||
a10c0ce7 CL |
817 | if (a->length != fw_get_response_length(r->request)) { |
818 | ret = -EINVAL; | |
819 | kfree(r->request); | |
820 | goto out; | |
821 | } | |
822 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length)) { | |
281e2032 SR |
823 | ret = -EFAULT; |
824 | kfree(r->request); | |
825 | goto out; | |
7e44c0b5 | 826 | } |
08bd34c9 | 827 | fw_send_response(r->card, r->request, a->rcode); |
7e44c0b5 | 828 | out: |
0244f573 | 829 | fw_card_put(r->card); |
19a15b93 KH |
830 | kfree(r); |
831 | ||
7e44c0b5 | 832 | return ret; |
19a15b93 KH |
833 | } |
834 | ||
6e95dea7 | 835 | static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg) |
5371842b | 836 | { |
02d37bed | 837 | fw_schedule_bus_reset(client->device->card, true, |
6e95dea7 | 838 | arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET); |
02d37bed | 839 | return 0; |
5371842b KH |
840 | } |
841 | ||
3964a449 KH |
842 | static void release_descriptor(struct client *client, |
843 | struct client_resource *resource) | |
844 | { | |
97c18b7f SR |
845 | struct descriptor_resource *r = |
846 | container_of(resource, struct descriptor_resource, resource); | |
3964a449 | 847 | |
97c18b7f SR |
848 | fw_core_remove_descriptor(&r->descriptor); |
849 | kfree(r); | |
3964a449 KH |
850 | } |
851 | ||
6e95dea7 | 852 | static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 853 | { |
6e95dea7 | 854 | struct fw_cdev_add_descriptor *a = &arg->add_descriptor; |
97c18b7f | 855 | struct descriptor_resource *r; |
45ee3199 | 856 | int ret; |
66dea3e5 | 857 | |
de487da8 | 858 | /* Access policy: Allow this ioctl only on local nodes' device files. */ |
92368890 | 859 | if (!client->device->is_local) |
de487da8 SR |
860 | return -ENOSYS; |
861 | ||
6e95dea7 | 862 | if (a->length > 256) |
66dea3e5 KH |
863 | return -EINVAL; |
864 | ||
6e95dea7 | 865 | r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL); |
97c18b7f | 866 | if (r == NULL) |
66dea3e5 KH |
867 | return -ENOMEM; |
868 | ||
6e95dea7 | 869 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) { |
45ee3199 JF |
870 | ret = -EFAULT; |
871 | goto failed; | |
66dea3e5 KH |
872 | } |
873 | ||
6e95dea7 SR |
874 | r->descriptor.length = a->length; |
875 | r->descriptor.immediate = a->immediate; | |
876 | r->descriptor.key = a->key; | |
97c18b7f | 877 | r->descriptor.data = r->data; |
66dea3e5 | 878 | |
97c18b7f | 879 | ret = fw_core_add_descriptor(&r->descriptor); |
45ee3199 JF |
880 | if (ret < 0) |
881 | goto failed; | |
66dea3e5 | 882 | |
97c18b7f SR |
883 | r->resource.release = release_descriptor; |
884 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 885 | if (ret < 0) { |
97c18b7f | 886 | fw_core_remove_descriptor(&r->descriptor); |
45ee3199 JF |
887 | goto failed; |
888 | } | |
6e95dea7 | 889 | a->handle = r->resource.handle; |
66dea3e5 KH |
890 | |
891 | return 0; | |
45ee3199 | 892 | failed: |
97c18b7f | 893 | kfree(r); |
45ee3199 JF |
894 | |
895 | return ret; | |
66dea3e5 KH |
896 | } |
897 | ||
6e95dea7 | 898 | static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 899 | { |
6e95dea7 | 900 | return release_client_resource(client, arg->remove_descriptor.handle, |
45ee3199 | 901 | release_descriptor, NULL); |
66dea3e5 KH |
902 | } |
903 | ||
53dca511 SR |
904 | static void iso_callback(struct fw_iso_context *context, u32 cycle, |
905 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
906 | { |
907 | struct client *client = data; | |
97c18b7f | 908 | struct iso_interrupt_event *e; |
19a15b93 | 909 | |
56d04cb1 | 910 | e = kmalloc(sizeof(*e) + header_length, GFP_ATOMIC); |
bf54e146 SR |
911 | if (e == NULL) { |
912 | fw_notify("Out of memory when allocating event\n"); | |
19a15b93 | 913 | return; |
bf54e146 | 914 | } |
97c18b7f SR |
915 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
916 | e->interrupt.closure = client->iso_closure; | |
917 | e->interrupt.cycle = cycle; | |
918 | e->interrupt.header_length = header_length; | |
919 | memcpy(e->interrupt.header, header, header_length); | |
920 | queue_event(client, &e->event, &e->interrupt, | |
921 | sizeof(e->interrupt) + header_length, NULL, 0); | |
19a15b93 KH |
922 | } |
923 | ||
872e330e SR |
924 | static void iso_mc_callback(struct fw_iso_context *context, |
925 | dma_addr_t completed, void *data) | |
926 | { | |
927 | struct client *client = data; | |
928 | struct iso_interrupt_mc_event *e; | |
929 | ||
930 | e = kmalloc(sizeof(*e), GFP_ATOMIC); | |
931 | if (e == NULL) { | |
932 | fw_notify("Out of memory when allocating event\n"); | |
933 | return; | |
934 | } | |
935 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL; | |
936 | e->interrupt.closure = client->iso_closure; | |
937 | e->interrupt.completed = fw_iso_buffer_lookup(&client->buffer, | |
938 | completed); | |
939 | queue_event(client, &e->event, &e->interrupt, | |
940 | sizeof(e->interrupt), NULL, 0); | |
941 | } | |
942 | ||
6e95dea7 | 943 | static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) |
19a15b93 | 944 | { |
6e95dea7 | 945 | struct fw_cdev_create_iso_context *a = &arg->create_iso_context; |
24315c5e | 946 | struct fw_iso_context *context; |
872e330e | 947 | fw_iso_callback_t cb; |
19a15b93 | 948 | |
eb5b35a5 | 949 | BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT != FW_ISO_CONTEXT_TRANSMIT || |
872e330e SR |
950 | FW_CDEV_ISO_CONTEXT_RECEIVE != FW_ISO_CONTEXT_RECEIVE || |
951 | FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL != | |
952 | FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL); | |
21efb3cf | 953 | |
6e95dea7 | 954 | switch (a->type) { |
872e330e SR |
955 | case FW_ISO_CONTEXT_TRANSMIT: |
956 | if (a->speed > SCODE_3200 || a->channel > 63) | |
c70dc788 | 957 | return -EINVAL; |
872e330e SR |
958 | |
959 | cb = iso_callback; | |
c70dc788 KH |
960 | break; |
961 | ||
872e330e SR |
962 | case FW_ISO_CONTEXT_RECEIVE: |
963 | if (a->header_size < 4 || (a->header_size & 3) || | |
964 | a->channel > 63) | |
c70dc788 | 965 | return -EINVAL; |
872e330e SR |
966 | |
967 | cb = iso_callback; | |
968 | break; | |
969 | ||
970 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
971 | cb = (fw_iso_callback_t)iso_mc_callback; | |
c70dc788 KH |
972 | break; |
973 | ||
974 | default: | |
21efb3cf | 975 | return -EINVAL; |
c70dc788 KH |
976 | } |
977 | ||
6e95dea7 | 978 | context = fw_iso_context_create(client->device->card, a->type, |
872e330e | 979 | a->channel, a->speed, a->header_size, cb, client); |
24315c5e KH |
980 | if (IS_ERR(context)) |
981 | return PTR_ERR(context); | |
982 | ||
bdfe273e CL |
983 | /* We only support one context at this time. */ |
984 | spin_lock_irq(&client->lock); | |
985 | if (client->iso_context != NULL) { | |
986 | spin_unlock_irq(&client->lock); | |
987 | fw_iso_context_destroy(context); | |
988 | return -EBUSY; | |
989 | } | |
6e95dea7 | 990 | client->iso_closure = a->closure; |
24315c5e | 991 | client->iso_context = context; |
bdfe273e | 992 | spin_unlock_irq(&client->lock); |
19a15b93 | 993 | |
6e95dea7 | 994 | a->handle = 0; |
abaa5743 | 995 | |
19a15b93 KH |
996 | return 0; |
997 | } | |
998 | ||
872e330e SR |
999 | static int ioctl_set_iso_channels(struct client *client, union ioctl_arg *arg) |
1000 | { | |
1001 | struct fw_cdev_set_iso_channels *a = &arg->set_iso_channels; | |
1002 | struct fw_iso_context *ctx = client->iso_context; | |
1003 | ||
1004 | if (ctx == NULL || a->handle != 0) | |
1005 | return -EINVAL; | |
1006 | ||
1007 | return fw_iso_context_set_channels(ctx, &a->channels); | |
1008 | } | |
1009 | ||
1ca31ae7 KH |
1010 | /* Macros for decoding the iso packet control header. */ |
1011 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) | |
1012 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) | |
1013 | #define GET_SKIP(v) (((v) >> 17) & 0x01) | |
7a100344 SR |
1014 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
1015 | #define GET_SY(v) (((v) >> 20) & 0x0f) | |
1ca31ae7 KH |
1016 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
1017 | ||
6e95dea7 | 1018 | static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1019 | { |
6e95dea7 | 1020 | struct fw_cdev_queue_iso *a = &arg->queue_iso; |
19a15b93 | 1021 | struct fw_cdev_iso_packet __user *p, *end, *next; |
9b32d5f3 | 1022 | struct fw_iso_context *ctx = client->iso_context; |
872e330e | 1023 | unsigned long payload, buffer_end, transmit_header_bytes = 0; |
1ca31ae7 | 1024 | u32 control; |
19a15b93 KH |
1025 | int count; |
1026 | struct { | |
1027 | struct fw_iso_packet packet; | |
1028 | u8 header[256]; | |
1029 | } u; | |
1030 | ||
6e95dea7 | 1031 | if (ctx == NULL || a->handle != 0) |
19a15b93 | 1032 | return -EINVAL; |
19a15b93 | 1033 | |
c781c06d KH |
1034 | /* |
1035 | * If the user passes a non-NULL data pointer, has mmap()'ed | |
19a15b93 KH |
1036 | * the iso buffer, and the pointer points inside the buffer, |
1037 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 1038 | * set them both to 0, which will still let packets with |
19a15b93 KH |
1039 | * payload_length == 0 through. In other words, if no packets |
1040 | * use the indirect payload, the iso buffer need not be mapped | |
6e95dea7 | 1041 | * and the a->data pointer is ignored. |
c781c06d | 1042 | */ |
6e95dea7 | 1043 | payload = (unsigned long)a->data - client->vm_start; |
ef370ee7 | 1044 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
6e95dea7 | 1045 | if (a->data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 1046 | payload >= buffer_end) { |
9aad8125 | 1047 | payload = 0; |
ef370ee7 | 1048 | buffer_end = 0; |
19a15b93 KH |
1049 | } |
1050 | ||
872e330e SR |
1051 | if (ctx->type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL && payload & 3) |
1052 | return -EINVAL; | |
1ccc9147 | 1053 | |
872e330e | 1054 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets); |
6e95dea7 | 1055 | if (!access_ok(VERIFY_READ, p, a->size)) |
19a15b93 KH |
1056 | return -EFAULT; |
1057 | ||
6e95dea7 | 1058 | end = (void __user *)p + a->size; |
19a15b93 KH |
1059 | count = 0; |
1060 | while (p < end) { | |
1ca31ae7 | 1061 | if (get_user(control, &p->control)) |
19a15b93 | 1062 | return -EFAULT; |
1ca31ae7 KH |
1063 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
1064 | u.packet.interrupt = GET_INTERRUPT(control); | |
1065 | u.packet.skip = GET_SKIP(control); | |
1066 | u.packet.tag = GET_TAG(control); | |
1067 | u.packet.sy = GET_SY(control); | |
1068 | u.packet.header_length = GET_HEADER_LENGTH(control); | |
295e3feb | 1069 | |
872e330e SR |
1070 | switch (ctx->type) { |
1071 | case FW_ISO_CONTEXT_TRANSMIT: | |
1072 | if (u.packet.header_length & 3) | |
385ab5bc | 1073 | return -EINVAL; |
ae2a9766 | 1074 | transmit_header_bytes = u.packet.header_length; |
872e330e SR |
1075 | break; |
1076 | ||
1077 | case FW_ISO_CONTEXT_RECEIVE: | |
69e61d0c SR |
1078 | if (u.packet.header_length == 0 || |
1079 | u.packet.header_length % ctx->header_size != 0) | |
385ab5bc | 1080 | return -EINVAL; |
872e330e SR |
1081 | break; |
1082 | ||
1083 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
1084 | if (u.packet.payload_length == 0 || | |
1085 | u.packet.payload_length & 3) | |
295e3feb | 1086 | return -EINVAL; |
872e330e | 1087 | break; |
295e3feb KH |
1088 | } |
1089 | ||
19a15b93 | 1090 | next = (struct fw_cdev_iso_packet __user *) |
ae2a9766 | 1091 | &p->header[transmit_header_bytes / 4]; |
19a15b93 KH |
1092 | if (next > end) |
1093 | return -EINVAL; | |
1094 | if (__copy_from_user | |
ae2a9766 | 1095 | (u.packet.header, p->header, transmit_header_bytes)) |
19a15b93 | 1096 | return -EFAULT; |
98b6cbe8 | 1097 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
1098 | u.packet.header_length + u.packet.payload_length > 0) |
1099 | return -EINVAL; | |
ef370ee7 | 1100 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
1101 | return -EINVAL; |
1102 | ||
9b32d5f3 KH |
1103 | if (fw_iso_context_queue(ctx, &u.packet, |
1104 | &client->buffer, payload)) | |
19a15b93 KH |
1105 | break; |
1106 | ||
1107 | p = next; | |
1108 | payload += u.packet.payload_length; | |
1109 | count++; | |
1110 | } | |
1111 | ||
6e95dea7 SR |
1112 | a->size -= uptr_to_u64(p) - a->packets; |
1113 | a->packets = uptr_to_u64(p); | |
1114 | a->data = client->vm_start + payload; | |
19a15b93 KH |
1115 | |
1116 | return count; | |
1117 | } | |
1118 | ||
6e95dea7 | 1119 | static int ioctl_start_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1120 | { |
6e95dea7 | 1121 | struct fw_cdev_start_iso *a = &arg->start_iso; |
19a15b93 | 1122 | |
eb5b35a5 SR |
1123 | BUILD_BUG_ON( |
1124 | FW_CDEV_ISO_CONTEXT_MATCH_TAG0 != FW_ISO_CONTEXT_MATCH_TAG0 || | |
1125 | FW_CDEV_ISO_CONTEXT_MATCH_TAG1 != FW_ISO_CONTEXT_MATCH_TAG1 || | |
1126 | FW_CDEV_ISO_CONTEXT_MATCH_TAG2 != FW_ISO_CONTEXT_MATCH_TAG2 || | |
1127 | FW_CDEV_ISO_CONTEXT_MATCH_TAG3 != FW_ISO_CONTEXT_MATCH_TAG3 || | |
1128 | FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS != FW_ISO_CONTEXT_MATCH_ALL_TAGS); | |
1129 | ||
6e95dea7 | 1130 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 | 1131 | return -EINVAL; |
fae60312 | 1132 | |
6e95dea7 SR |
1133 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE && |
1134 | (a->tags == 0 || a->tags > 15 || a->sync > 15)) | |
1135 | return -EINVAL; | |
eb0306ea | 1136 | |
6e95dea7 SR |
1137 | return fw_iso_context_start(client->iso_context, |
1138 | a->cycle, a->sync, a->tags); | |
19a15b93 KH |
1139 | } |
1140 | ||
6e95dea7 | 1141 | static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg) |
b8295668 | 1142 | { |
6e95dea7 | 1143 | struct fw_cdev_stop_iso *a = &arg->stop_iso; |
abaa5743 | 1144 | |
6e95dea7 | 1145 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 KH |
1146 | return -EINVAL; |
1147 | ||
b8295668 KH |
1148 | return fw_iso_context_stop(client->iso_context); |
1149 | } | |
1150 | ||
6e95dea7 | 1151 | static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg) |
a64408b9 | 1152 | { |
6e95dea7 | 1153 | struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2; |
a64408b9 | 1154 | struct fw_card *card = client->device->card; |
abfe5a01 | 1155 | struct timespec ts = {0, 0}; |
4a9bde9b | 1156 | u32 cycle_time; |
abfe5a01 | 1157 | int ret = 0; |
a64408b9 | 1158 | |
4a9bde9b | 1159 | local_irq_disable(); |
a64408b9 | 1160 | |
0fcff4e3 | 1161 | cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME); |
abfe5a01 | 1162 | |
6e95dea7 | 1163 | switch (a->clk_id) { |
abfe5a01 SR |
1164 | case CLOCK_REALTIME: getnstimeofday(&ts); break; |
1165 | case CLOCK_MONOTONIC: do_posix_clock_monotonic_gettime(&ts); break; | |
1166 | case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts); break; | |
1167 | default: | |
1168 | ret = -EINVAL; | |
1169 | } | |
a64408b9 | 1170 | |
4a9bde9b | 1171 | local_irq_enable(); |
a64408b9 | 1172 | |
6e95dea7 SR |
1173 | a->tv_sec = ts.tv_sec; |
1174 | a->tv_nsec = ts.tv_nsec; | |
1175 | a->cycle_timer = cycle_time; | |
abfe5a01 SR |
1176 | |
1177 | return ret; | |
1178 | } | |
1179 | ||
6e95dea7 | 1180 | static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg) |
abfe5a01 | 1181 | { |
6e95dea7 | 1182 | struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer; |
abfe5a01 SR |
1183 | struct fw_cdev_get_cycle_timer2 ct2; |
1184 | ||
1185 | ct2.clk_id = CLOCK_REALTIME; | |
6e95dea7 | 1186 | ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2); |
abfe5a01 | 1187 | |
6e95dea7 SR |
1188 | a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC; |
1189 | a->cycle_timer = ct2.cycle_timer; | |
4a9bde9b | 1190 | |
a64408b9 SR |
1191 | return 0; |
1192 | } | |
1193 | ||
b1bda4cd JFSR |
1194 | static void iso_resource_work(struct work_struct *work) |
1195 | { | |
1196 | struct iso_resource_event *e; | |
1197 | struct iso_resource *r = | |
1198 | container_of(work, struct iso_resource, work.work); | |
1199 | struct client *client = r->client; | |
1200 | int generation, channel, bandwidth, todo; | |
1201 | bool skip, free, success; | |
1202 | ||
1203 | spin_lock_irq(&client->lock); | |
1204 | generation = client->device->generation; | |
1205 | todo = r->todo; | |
1206 | /* Allow 1000ms grace period for other reallocations. */ | |
1207 | if (todo == ISO_RES_ALLOC && | |
e71084af CL |
1208 | time_before64(get_jiffies_64(), |
1209 | client->device->card->reset_jiffies + HZ)) { | |
9fb551bf | 1210 | schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3)); |
b1bda4cd JFSR |
1211 | skip = true; |
1212 | } else { | |
1213 | /* We could be called twice within the same generation. */ | |
1214 | skip = todo == ISO_RES_REALLOC && | |
1215 | r->generation == generation; | |
1216 | } | |
1ec3c026 SR |
1217 | free = todo == ISO_RES_DEALLOC || |
1218 | todo == ISO_RES_ALLOC_ONCE || | |
1219 | todo == ISO_RES_DEALLOC_ONCE; | |
b1bda4cd JFSR |
1220 | r->generation = generation; |
1221 | spin_unlock_irq(&client->lock); | |
1222 | ||
1223 | if (skip) | |
1224 | goto out; | |
1225 | ||
1226 | bandwidth = r->bandwidth; | |
1227 | ||
1228 | fw_iso_resource_manage(client->device->card, generation, | |
1229 | r->channels, &channel, &bandwidth, | |
1ec3c026 SR |
1230 | todo == ISO_RES_ALLOC || |
1231 | todo == ISO_RES_REALLOC || | |
6fdc0370 SR |
1232 | todo == ISO_RES_ALLOC_ONCE, |
1233 | r->transaction_data); | |
b1bda4cd JFSR |
1234 | /* |
1235 | * Is this generation outdated already? As long as this resource sticks | |
1236 | * in the idr, it will be scheduled again for a newer generation or at | |
1237 | * shutdown. | |
1238 | */ | |
1239 | if (channel == -EAGAIN && | |
1240 | (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC)) | |
1241 | goto out; | |
1242 | ||
1243 | success = channel >= 0 || bandwidth > 0; | |
1244 | ||
1245 | spin_lock_irq(&client->lock); | |
1246 | /* | |
1247 | * Transit from allocation to reallocation, except if the client | |
1248 | * requested deallocation in the meantime. | |
1249 | */ | |
1250 | if (r->todo == ISO_RES_ALLOC) | |
1251 | r->todo = ISO_RES_REALLOC; | |
1252 | /* | |
1253 | * Allocation or reallocation failure? Pull this resource out of the | |
1254 | * idr and prepare for deletion, unless the client is shutting down. | |
1255 | */ | |
1256 | if (r->todo == ISO_RES_REALLOC && !success && | |
1257 | !client->in_shutdown && | |
1258 | idr_find(&client->resource_idr, r->resource.handle)) { | |
1259 | idr_remove(&client->resource_idr, r->resource.handle); | |
1260 | client_put(client); | |
1261 | free = true; | |
1262 | } | |
1263 | spin_unlock_irq(&client->lock); | |
1264 | ||
1265 | if (todo == ISO_RES_ALLOC && channel >= 0) | |
5d9cb7d2 | 1266 | r->channels = 1ULL << channel; |
b1bda4cd JFSR |
1267 | |
1268 | if (todo == ISO_RES_REALLOC && success) | |
1269 | goto out; | |
1270 | ||
1ec3c026 | 1271 | if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) { |
b1bda4cd JFSR |
1272 | e = r->e_alloc; |
1273 | r->e_alloc = NULL; | |
1274 | } else { | |
1275 | e = r->e_dealloc; | |
1276 | r->e_dealloc = NULL; | |
1277 | } | |
e21fcf79 SR |
1278 | e->iso_resource.handle = r->resource.handle; |
1279 | e->iso_resource.channel = channel; | |
1280 | e->iso_resource.bandwidth = bandwidth; | |
b1bda4cd JFSR |
1281 | |
1282 | queue_event(client, &e->event, | |
e21fcf79 | 1283 | &e->iso_resource, sizeof(e->iso_resource), NULL, 0); |
b1bda4cd JFSR |
1284 | |
1285 | if (free) { | |
1286 | cancel_delayed_work(&r->work); | |
1287 | kfree(r->e_alloc); | |
1288 | kfree(r->e_dealloc); | |
1289 | kfree(r); | |
1290 | } | |
1291 | out: | |
1292 | client_put(client); | |
1293 | } | |
1294 | ||
b1bda4cd JFSR |
1295 | static void release_iso_resource(struct client *client, |
1296 | struct client_resource *resource) | |
1297 | { | |
1298 | struct iso_resource *r = | |
1299 | container_of(resource, struct iso_resource, resource); | |
1300 | ||
1301 | spin_lock_irq(&client->lock); | |
1302 | r->todo = ISO_RES_DEALLOC; | |
9fb551bf | 1303 | schedule_iso_resource(r, 0); |
b1bda4cd JFSR |
1304 | spin_unlock_irq(&client->lock); |
1305 | } | |
1306 | ||
1ec3c026 SR |
1307 | static int init_iso_resource(struct client *client, |
1308 | struct fw_cdev_allocate_iso_resource *request, int todo) | |
b1bda4cd | 1309 | { |
b1bda4cd JFSR |
1310 | struct iso_resource_event *e1, *e2; |
1311 | struct iso_resource *r; | |
1312 | int ret; | |
1313 | ||
1314 | if ((request->channels == 0 && request->bandwidth == 0) || | |
1315 | request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL || | |
1316 | request->bandwidth < 0) | |
1317 | return -EINVAL; | |
1318 | ||
1319 | r = kmalloc(sizeof(*r), GFP_KERNEL); | |
1320 | e1 = kmalloc(sizeof(*e1), GFP_KERNEL); | |
1321 | e2 = kmalloc(sizeof(*e2), GFP_KERNEL); | |
1322 | if (r == NULL || e1 == NULL || e2 == NULL) { | |
1323 | ret = -ENOMEM; | |
1324 | goto fail; | |
1325 | } | |
1326 | ||
1327 | INIT_DELAYED_WORK(&r->work, iso_resource_work); | |
1328 | r->client = client; | |
1ec3c026 | 1329 | r->todo = todo; |
b1bda4cd JFSR |
1330 | r->generation = -1; |
1331 | r->channels = request->channels; | |
1332 | r->bandwidth = request->bandwidth; | |
1333 | r->e_alloc = e1; | |
1334 | r->e_dealloc = e2; | |
1335 | ||
e21fcf79 SR |
1336 | e1->iso_resource.closure = request->closure; |
1337 | e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED; | |
1338 | e2->iso_resource.closure = request->closure; | |
1339 | e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED; | |
b1bda4cd | 1340 | |
1ec3c026 SR |
1341 | if (todo == ISO_RES_ALLOC) { |
1342 | r->resource.release = release_iso_resource; | |
1343 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
81610b8f SR |
1344 | if (ret < 0) |
1345 | goto fail; | |
1ec3c026 SR |
1346 | } else { |
1347 | r->resource.release = NULL; | |
1348 | r->resource.handle = -1; | |
9fb551bf | 1349 | schedule_iso_resource(r, 0); |
1ec3c026 | 1350 | } |
b1bda4cd JFSR |
1351 | request->handle = r->resource.handle; |
1352 | ||
1353 | return 0; | |
1354 | fail: | |
1355 | kfree(r); | |
1356 | kfree(e1); | |
1357 | kfree(e2); | |
1358 | ||
1359 | return ret; | |
1360 | } | |
1361 | ||
6e95dea7 SR |
1362 | static int ioctl_allocate_iso_resource(struct client *client, |
1363 | union ioctl_arg *arg) | |
1ec3c026 | 1364 | { |
6e95dea7 SR |
1365 | return init_iso_resource(client, |
1366 | &arg->allocate_iso_resource, ISO_RES_ALLOC); | |
1ec3c026 SR |
1367 | } |
1368 | ||
6e95dea7 SR |
1369 | static int ioctl_deallocate_iso_resource(struct client *client, |
1370 | union ioctl_arg *arg) | |
b1bda4cd | 1371 | { |
6e95dea7 SR |
1372 | return release_client_resource(client, |
1373 | arg->deallocate.handle, release_iso_resource, NULL); | |
b1bda4cd JFSR |
1374 | } |
1375 | ||
6e95dea7 SR |
1376 | static int ioctl_allocate_iso_resource_once(struct client *client, |
1377 | union ioctl_arg *arg) | |
1ec3c026 | 1378 | { |
6e95dea7 SR |
1379 | return init_iso_resource(client, |
1380 | &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE); | |
1ec3c026 SR |
1381 | } |
1382 | ||
6e95dea7 SR |
1383 | static int ioctl_deallocate_iso_resource_once(struct client *client, |
1384 | union ioctl_arg *arg) | |
1ec3c026 | 1385 | { |
6e95dea7 SR |
1386 | return init_iso_resource(client, |
1387 | &arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE); | |
1ec3c026 SR |
1388 | } |
1389 | ||
c8a25900 SR |
1390 | /* |
1391 | * Returns a speed code: Maximum speed to or from this device, | |
1392 | * limited by the device's link speed, the local node's link speed, | |
1393 | * and all PHY port speeds between the two links. | |
1394 | */ | |
6e95dea7 | 1395 | static int ioctl_get_speed(struct client *client, union ioctl_arg *arg) |
33580a3e | 1396 | { |
c8a25900 | 1397 | return client->device->max_speed; |
33580a3e SR |
1398 | } |
1399 | ||
6e95dea7 SR |
1400 | static int ioctl_send_broadcast_request(struct client *client, |
1401 | union ioctl_arg *arg) | |
acfe8333 | 1402 | { |
6e95dea7 | 1403 | struct fw_cdev_send_request *a = &arg->send_request; |
acfe8333 | 1404 | |
6e95dea7 | 1405 | switch (a->tcode) { |
acfe8333 JFSR |
1406 | case TCODE_WRITE_QUADLET_REQUEST: |
1407 | case TCODE_WRITE_BLOCK_REQUEST: | |
1408 | break; | |
1409 | default: | |
1410 | return -EINVAL; | |
1411 | } | |
1412 | ||
1566f3dc | 1413 | /* Security policy: Only allow accesses to Units Space. */ |
6e95dea7 | 1414 | if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END) |
1566f3dc SR |
1415 | return -EACCES; |
1416 | ||
6e95dea7 | 1417 | return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100); |
acfe8333 JFSR |
1418 | } |
1419 | ||
6e95dea7 | 1420 | static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg) |
f8c2287c | 1421 | { |
6e95dea7 | 1422 | struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet; |
18e9b10f SR |
1423 | struct fw_cdev_send_request request; |
1424 | int dest; | |
f8c2287c | 1425 | |
6e95dea7 SR |
1426 | if (a->speed > client->device->card->link_speed || |
1427 | a->length > 1024 << a->speed) | |
18e9b10f | 1428 | return -EIO; |
f8c2287c | 1429 | |
6e95dea7 | 1430 | if (a->tag > 3 || a->channel > 63 || a->sy > 15) |
18e9b10f SR |
1431 | return -EINVAL; |
1432 | ||
6e95dea7 | 1433 | dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy); |
18e9b10f | 1434 | request.tcode = TCODE_STREAM_DATA; |
6e95dea7 SR |
1435 | request.length = a->length; |
1436 | request.closure = a->closure; | |
1437 | request.data = a->data; | |
1438 | request.generation = a->generation; | |
18e9b10f | 1439 | |
6e95dea7 | 1440 | return init_request(client, &request, dest, a->speed); |
f8c2287c JF |
1441 | } |
1442 | ||
850bb6f2 SR |
1443 | static void outbound_phy_packet_callback(struct fw_packet *packet, |
1444 | struct fw_card *card, int status) | |
1445 | { | |
1446 | struct outbound_phy_packet_event *e = | |
1447 | container_of(packet, struct outbound_phy_packet_event, p); | |
1448 | ||
1449 | switch (status) { | |
1450 | /* expected: */ | |
1451 | case ACK_COMPLETE: e->phy_packet.rcode = RCODE_COMPLETE; break; | |
1452 | /* should never happen with PHY packets: */ | |
1453 | case ACK_PENDING: e->phy_packet.rcode = RCODE_COMPLETE; break; | |
1454 | case ACK_BUSY_X: | |
1455 | case ACK_BUSY_A: | |
1456 | case ACK_BUSY_B: e->phy_packet.rcode = RCODE_BUSY; break; | |
1457 | case ACK_DATA_ERROR: e->phy_packet.rcode = RCODE_DATA_ERROR; break; | |
1458 | case ACK_TYPE_ERROR: e->phy_packet.rcode = RCODE_TYPE_ERROR; break; | |
1459 | /* stale generation; cancelled; on certain controllers: no ack */ | |
1460 | default: e->phy_packet.rcode = status; break; | |
1461 | } | |
cc550216 | 1462 | e->phy_packet.data[0] = packet->timestamp; |
850bb6f2 | 1463 | |
cc550216 SR |
1464 | queue_event(e->client, &e->event, &e->phy_packet, |
1465 | sizeof(e->phy_packet) + e->phy_packet.length, NULL, 0); | |
850bb6f2 SR |
1466 | client_put(e->client); |
1467 | } | |
1468 | ||
1469 | static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg) | |
1470 | { | |
1471 | struct fw_cdev_send_phy_packet *a = &arg->send_phy_packet; | |
1472 | struct fw_card *card = client->device->card; | |
1473 | struct outbound_phy_packet_event *e; | |
1474 | ||
1475 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1476 | if (!client->device->is_local) | |
1477 | return -ENOSYS; | |
1478 | ||
cc550216 | 1479 | e = kzalloc(sizeof(*e) + 4, GFP_KERNEL); |
850bb6f2 SR |
1480 | if (e == NULL) |
1481 | return -ENOMEM; | |
1482 | ||
1483 | client_get(client); | |
1484 | e->client = client; | |
1485 | e->p.speed = SCODE_100; | |
1486 | e->p.generation = a->generation; | |
5b06db16 CL |
1487 | e->p.header[0] = TCODE_LINK_INTERNAL << 4; |
1488 | e->p.header[1] = a->data[0]; | |
1489 | e->p.header[2] = a->data[1]; | |
1490 | e->p.header_length = 12; | |
850bb6f2 SR |
1491 | e->p.callback = outbound_phy_packet_callback; |
1492 | e->phy_packet.closure = a->closure; | |
1493 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_SENT; | |
cc550216 SR |
1494 | if (is_ping_packet(a->data)) |
1495 | e->phy_packet.length = 4; | |
850bb6f2 SR |
1496 | |
1497 | card->driver->send_request(card, &e->p); | |
1498 | ||
1499 | return 0; | |
1500 | } | |
1501 | ||
bf54e146 SR |
1502 | static int ioctl_receive_phy_packets(struct client *client, union ioctl_arg *arg) |
1503 | { | |
1504 | struct fw_cdev_receive_phy_packets *a = &arg->receive_phy_packets; | |
1505 | struct fw_card *card = client->device->card; | |
1506 | ||
1507 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1508 | if (!client->device->is_local) | |
1509 | return -ENOSYS; | |
1510 | ||
1511 | spin_lock_irq(&card->lock); | |
1512 | ||
1513 | list_move_tail(&client->phy_receiver_link, &card->phy_receiver_list); | |
1514 | client->phy_receiver_closure = a->closure; | |
1515 | ||
1516 | spin_unlock_irq(&card->lock); | |
1517 | ||
1518 | return 0; | |
1519 | } | |
1520 | ||
1521 | void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p) | |
1522 | { | |
1523 | struct client *client; | |
1524 | struct inbound_phy_packet_event *e; | |
1525 | unsigned long flags; | |
1526 | ||
1527 | spin_lock_irqsave(&card->lock, flags); | |
1528 | ||
1529 | list_for_each_entry(client, &card->phy_receiver_list, phy_receiver_link) { | |
1530 | e = kmalloc(sizeof(*e) + 8, GFP_ATOMIC); | |
1531 | if (e == NULL) { | |
1532 | fw_notify("Out of memory when allocating event\n"); | |
1533 | break; | |
1534 | } | |
1535 | e->phy_packet.closure = client->phy_receiver_closure; | |
1536 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_RECEIVED; | |
1537 | e->phy_packet.rcode = RCODE_COMPLETE; | |
1538 | e->phy_packet.length = 8; | |
1539 | e->phy_packet.data[0] = p->header[1]; | |
1540 | e->phy_packet.data[1] = p->header[2]; | |
1541 | queue_event(client, &e->event, | |
1542 | &e->phy_packet, sizeof(e->phy_packet) + 8, NULL, 0); | |
1543 | } | |
1544 | ||
1545 | spin_unlock_irqrestore(&card->lock, flags); | |
1546 | } | |
1547 | ||
6e95dea7 | 1548 | static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = { |
b9dc61cf SR |
1549 | [0x00] = ioctl_get_info, |
1550 | [0x01] = ioctl_send_request, | |
1551 | [0x02] = ioctl_allocate, | |
1552 | [0x03] = ioctl_deallocate, | |
1553 | [0x04] = ioctl_send_response, | |
1554 | [0x05] = ioctl_initiate_bus_reset, | |
1555 | [0x06] = ioctl_add_descriptor, | |
1556 | [0x07] = ioctl_remove_descriptor, | |
1557 | [0x08] = ioctl_create_iso_context, | |
1558 | [0x09] = ioctl_queue_iso, | |
1559 | [0x0a] = ioctl_start_iso, | |
1560 | [0x0b] = ioctl_stop_iso, | |
1561 | [0x0c] = ioctl_get_cycle_timer, | |
1562 | [0x0d] = ioctl_allocate_iso_resource, | |
1563 | [0x0e] = ioctl_deallocate_iso_resource, | |
1564 | [0x0f] = ioctl_allocate_iso_resource_once, | |
1565 | [0x10] = ioctl_deallocate_iso_resource_once, | |
1566 | [0x11] = ioctl_get_speed, | |
1567 | [0x12] = ioctl_send_broadcast_request, | |
1568 | [0x13] = ioctl_send_stream_packet, | |
1569 | [0x14] = ioctl_get_cycle_timer2, | |
850bb6f2 | 1570 | [0x15] = ioctl_send_phy_packet, |
bf54e146 | 1571 | [0x16] = ioctl_receive_phy_packets, |
872e330e | 1572 | [0x17] = ioctl_set_iso_channels, |
4f259223 KH |
1573 | }; |
1574 | ||
53dca511 SR |
1575 | static int dispatch_ioctl(struct client *client, |
1576 | unsigned int cmd, void __user *arg) | |
19a15b93 | 1577 | { |
6e95dea7 | 1578 | union ioctl_arg buffer; |
2dbd7d7e | 1579 | int ret; |
4f259223 | 1580 | |
64582298 SR |
1581 | if (fw_device_is_shutdown(client->device)) |
1582 | return -ENODEV; | |
1583 | ||
4f259223 | 1584 | if (_IOC_TYPE(cmd) != '#' || |
9cac00b8 SR |
1585 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) || |
1586 | _IOC_SIZE(cmd) > sizeof(buffer)) | |
19a15b93 | 1587 | return -EINVAL; |
4f259223 | 1588 | |
9cac00b8 SR |
1589 | if (_IOC_DIR(cmd) == _IOC_READ) |
1590 | memset(&buffer, 0, _IOC_SIZE(cmd)); | |
1591 | ||
1592 | if (_IOC_DIR(cmd) & _IOC_WRITE) | |
1593 | if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd))) | |
4f259223 | 1594 | return -EFAULT; |
4f259223 | 1595 | |
6e95dea7 | 1596 | ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer); |
2dbd7d7e SR |
1597 | if (ret < 0) |
1598 | return ret; | |
4f259223 | 1599 | |
9cac00b8 SR |
1600 | if (_IOC_DIR(cmd) & _IOC_READ) |
1601 | if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd))) | |
4f259223 | 1602 | return -EFAULT; |
4f259223 | 1603 | |
2dbd7d7e | 1604 | return ret; |
19a15b93 KH |
1605 | } |
1606 | ||
53dca511 SR |
1607 | static long fw_device_op_ioctl(struct file *file, |
1608 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1609 | { |
64582298 | 1610 | return dispatch_ioctl(file->private_data, cmd, (void __user *)arg); |
19a15b93 KH |
1611 | } |
1612 | ||
1613 | #ifdef CONFIG_COMPAT | |
53dca511 SR |
1614 | static long fw_device_op_compat_ioctl(struct file *file, |
1615 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1616 | { |
64582298 | 1617 | return dispatch_ioctl(file->private_data, cmd, compat_ptr(arg)); |
19a15b93 KH |
1618 | } |
1619 | #endif | |
1620 | ||
1621 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
1622 | { | |
1623 | struct client *client = file->private_data; | |
9aad8125 KH |
1624 | enum dma_data_direction direction; |
1625 | unsigned long size; | |
2dbd7d7e | 1626 | int page_count, ret; |
9aad8125 | 1627 | |
551f4cb9 JF |
1628 | if (fw_device_is_shutdown(client->device)) |
1629 | return -ENODEV; | |
1630 | ||
9aad8125 KH |
1631 | /* FIXME: We could support multiple buffers, but we don't. */ |
1632 | if (client->buffer.pages != NULL) | |
1633 | return -EBUSY; | |
1634 | ||
1635 | if (!(vma->vm_flags & VM_SHARED)) | |
1636 | return -EINVAL; | |
19a15b93 | 1637 | |
9aad8125 | 1638 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
1639 | return -EINVAL; |
1640 | ||
1641 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
1642 | size = vma->vm_end - vma->vm_start; |
1643 | page_count = size >> PAGE_SHIFT; | |
1644 | if (size & ~PAGE_MASK) | |
1645 | return -EINVAL; | |
1646 | ||
1647 | if (vma->vm_flags & VM_WRITE) | |
1648 | direction = DMA_TO_DEVICE; | |
1649 | else | |
1650 | direction = DMA_FROM_DEVICE; | |
1651 | ||
2dbd7d7e SR |
1652 | ret = fw_iso_buffer_init(&client->buffer, client->device->card, |
1653 | page_count, direction); | |
1654 | if (ret < 0) | |
1655 | return ret; | |
19a15b93 | 1656 | |
2dbd7d7e SR |
1657 | ret = fw_iso_buffer_map(&client->buffer, vma); |
1658 | if (ret < 0) | |
9aad8125 KH |
1659 | fw_iso_buffer_destroy(&client->buffer, client->device->card); |
1660 | ||
2dbd7d7e | 1661 | return ret; |
19a15b93 KH |
1662 | } |
1663 | ||
5a5e62da CL |
1664 | static int is_outbound_transaction_resource(int id, void *p, void *data) |
1665 | { | |
1666 | struct client_resource *resource = p; | |
1667 | ||
1668 | return resource->release == release_transaction; | |
1669 | } | |
1670 | ||
1671 | static int has_outbound_transactions(struct client *client) | |
1672 | { | |
1673 | int ret; | |
1674 | ||
1675 | spin_lock_irq(&client->lock); | |
1676 | ret = idr_for_each(&client->resource_idr, | |
1677 | is_outbound_transaction_resource, NULL); | |
1678 | spin_unlock_irq(&client->lock); | |
1679 | ||
1680 | return ret; | |
1681 | } | |
1682 | ||
45ee3199 JF |
1683 | static int shutdown_resource(int id, void *p, void *data) |
1684 | { | |
e21fcf79 | 1685 | struct client_resource *resource = p; |
45ee3199 JF |
1686 | struct client *client = data; |
1687 | ||
e21fcf79 | 1688 | resource->release(client, resource); |
fb443036 | 1689 | client_put(client); |
45ee3199 JF |
1690 | |
1691 | return 0; | |
1692 | } | |
1693 | ||
19a15b93 KH |
1694 | static int fw_device_op_release(struct inode *inode, struct file *file) |
1695 | { | |
1696 | struct client *client = file->private_data; | |
e21fcf79 | 1697 | struct event *event, *next_event; |
19a15b93 | 1698 | |
bf54e146 SR |
1699 | spin_lock_irq(&client->device->card->lock); |
1700 | list_del(&client->phy_receiver_link); | |
1701 | spin_unlock_irq(&client->device->card->lock); | |
1702 | ||
97811e34 SR |
1703 | mutex_lock(&client->device->client_list_mutex); |
1704 | list_del(&client->link); | |
1705 | mutex_unlock(&client->device->client_list_mutex); | |
1706 | ||
19a15b93 KH |
1707 | if (client->iso_context) |
1708 | fw_iso_context_destroy(client->iso_context); | |
1709 | ||
36a755cf SR |
1710 | if (client->buffer.pages) |
1711 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
1712 | ||
45ee3199 | 1713 | /* Freeze client->resource_idr and client->event_list */ |
3ba94986 | 1714 | spin_lock_irq(&client->lock); |
45ee3199 | 1715 | client->in_shutdown = true; |
3ba94986 | 1716 | spin_unlock_irq(&client->lock); |
66dea3e5 | 1717 | |
5a5e62da CL |
1718 | wait_event(client->tx_flush_wait, !has_outbound_transactions(client)); |
1719 | ||
45ee3199 JF |
1720 | idr_for_each(&client->resource_idr, shutdown_resource, client); |
1721 | idr_remove_all(&client->resource_idr); | |
1722 | idr_destroy(&client->resource_idr); | |
28cf6a04 | 1723 | |
e21fcf79 SR |
1724 | list_for_each_entry_safe(event, next_event, &client->event_list, link) |
1725 | kfree(event); | |
19a15b93 | 1726 | |
fb443036 | 1727 | client_put(client); |
19a15b93 KH |
1728 | |
1729 | return 0; | |
1730 | } | |
1731 | ||
1732 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
1733 | { | |
1734 | struct client *client = file->private_data; | |
2603bf21 | 1735 | unsigned int mask = 0; |
19a15b93 KH |
1736 | |
1737 | poll_wait(file, &client->wait, pt); | |
1738 | ||
2603bf21 KH |
1739 | if (fw_device_is_shutdown(client->device)) |
1740 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 1741 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
1742 | mask |= POLLIN | POLLRDNORM; |
1743 | ||
1744 | return mask; | |
19a15b93 KH |
1745 | } |
1746 | ||
21ebcd12 | 1747 | const struct file_operations fw_device_ops = { |
19a15b93 | 1748 | .owner = THIS_MODULE, |
3ac26b2e | 1749 | .llseek = no_llseek, |
19a15b93 KH |
1750 | .open = fw_device_op_open, |
1751 | .read = fw_device_op_read, | |
1752 | .unlocked_ioctl = fw_device_op_ioctl, | |
19a15b93 | 1753 | .mmap = fw_device_op_mmap, |
3ac26b2e SR |
1754 | .release = fw_device_op_release, |
1755 | .poll = fw_device_op_poll, | |
19a15b93 | 1756 | #ifdef CONFIG_COMPAT |
5af4e5ea | 1757 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
1758 | #endif |
1759 | }; |