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 | */ | |
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; | |
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; | |
144 | struct iso_resource_event *e_alloc, *e_dealloc; | |
145 | }; | |
146 | ||
b1bda4cd JFSR |
147 | static void release_iso_resource(struct client *, struct client_resource *); |
148 | ||
9fb551bf SR |
149 | static void schedule_iso_resource(struct iso_resource *r, unsigned long delay) |
150 | { | |
151 | client_get(r->client); | |
105e53f8 | 152 | if (!queue_delayed_work(fw_workqueue, &r->work, delay)) |
9fb551bf SR |
153 | client_put(r->client); |
154 | } | |
155 | ||
156 | static void schedule_if_iso_resource(struct client_resource *resource) | |
157 | { | |
158 | if (resource->release == release_iso_resource) | |
159 | schedule_iso_resource(container_of(resource, | |
160 | struct iso_resource, resource), 0); | |
161 | } | |
162 | ||
97c18b7f SR |
163 | /* |
164 | * dequeue_event() just kfree()'s the event, so the event has to be | |
165 | * the first field in a struct XYZ_event. | |
166 | */ | |
167 | struct event { | |
168 | struct { void *data; size_t size; } v[2]; | |
169 | struct list_head link; | |
170 | }; | |
171 | ||
172 | struct bus_reset_event { | |
173 | struct event event; | |
174 | struct fw_cdev_event_bus_reset reset; | |
175 | }; | |
176 | ||
177 | struct outbound_transaction_event { | |
178 | struct event event; | |
179 | struct client *client; | |
180 | struct outbound_transaction_resource r; | |
181 | struct fw_cdev_event_response response; | |
182 | }; | |
183 | ||
184 | struct inbound_transaction_event { | |
185 | struct event event; | |
e205597d SR |
186 | union { |
187 | struct fw_cdev_event_request request; | |
188 | struct fw_cdev_event_request2 request2; | |
189 | } req; | |
97c18b7f SR |
190 | }; |
191 | ||
192 | struct iso_interrupt_event { | |
193 | struct event event; | |
194 | struct fw_cdev_event_iso_interrupt interrupt; | |
195 | }; | |
196 | ||
872e330e SR |
197 | struct iso_interrupt_mc_event { |
198 | struct event event; | |
199 | struct fw_cdev_event_iso_interrupt_mc interrupt; | |
200 | }; | |
201 | ||
b1bda4cd JFSR |
202 | struct iso_resource_event { |
203 | struct event event; | |
e21fcf79 | 204 | struct fw_cdev_event_iso_resource iso_resource; |
b1bda4cd JFSR |
205 | }; |
206 | ||
850bb6f2 SR |
207 | struct outbound_phy_packet_event { |
208 | struct event event; | |
209 | struct client *client; | |
210 | struct fw_packet p; | |
211 | struct fw_cdev_event_phy_packet phy_packet; | |
212 | }; | |
213 | ||
bf54e146 SR |
214 | struct inbound_phy_packet_event { |
215 | struct event event; | |
216 | struct fw_cdev_event_phy_packet phy_packet; | |
217 | }; | |
218 | ||
9c1176b6 SR |
219 | #ifdef CONFIG_COMPAT |
220 | static void __user *u64_to_uptr(u64 value) | |
221 | { | |
222 | if (is_compat_task()) | |
223 | return compat_ptr(value); | |
224 | else | |
225 | return (void __user *)(unsigned long)value; | |
226 | } | |
227 | ||
228 | static u64 uptr_to_u64(void __user *ptr) | |
229 | { | |
230 | if (is_compat_task()) | |
231 | return ptr_to_compat(ptr); | |
232 | else | |
233 | return (u64)(unsigned long)ptr; | |
234 | } | |
235 | #else | |
236 | static inline void __user *u64_to_uptr(u64 value) | |
19a15b93 KH |
237 | { |
238 | return (void __user *)(unsigned long)value; | |
239 | } | |
240 | ||
9c1176b6 | 241 | static inline u64 uptr_to_u64(void __user *ptr) |
19a15b93 | 242 | { |
9c1176b6 | 243 | return (u64)(unsigned long)ptr; |
19a15b93 | 244 | } |
9c1176b6 | 245 | #endif /* CONFIG_COMPAT */ |
19a15b93 KH |
246 | |
247 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
248 | { | |
249 | struct fw_device *device; | |
250 | struct client *client; | |
251 | ||
96b19062 | 252 | device = fw_device_get_by_devt(inode->i_rdev); |
a3aca3da KH |
253 | if (device == NULL) |
254 | return -ENODEV; | |
19a15b93 | 255 | |
551f4cb9 JF |
256 | if (fw_device_is_shutdown(device)) { |
257 | fw_device_put(device); | |
258 | return -ENODEV; | |
259 | } | |
260 | ||
2d826cc5 | 261 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
96b19062 SR |
262 | if (client == NULL) { |
263 | fw_device_put(device); | |
19a15b93 | 264 | return -ENOMEM; |
96b19062 | 265 | } |
19a15b93 | 266 | |
96b19062 | 267 | client->device = device; |
19a15b93 | 268 | spin_lock_init(&client->lock); |
45ee3199 JF |
269 | idr_init(&client->resource_idr); |
270 | INIT_LIST_HEAD(&client->event_list); | |
19a15b93 | 271 | init_waitqueue_head(&client->wait); |
5a5e62da | 272 | init_waitqueue_head(&client->tx_flush_wait); |
bf54e146 | 273 | INIT_LIST_HEAD(&client->phy_receiver_link); |
93b37905 | 274 | INIT_LIST_HEAD(&client->link); |
fb443036 | 275 | kref_init(&client->kref); |
19a15b93 KH |
276 | |
277 | file->private_data = client; | |
278 | ||
3ac26b2e | 279 | return nonseekable_open(inode, file); |
19a15b93 KH |
280 | } |
281 | ||
282 | static void queue_event(struct client *client, struct event *event, | |
283 | void *data0, size_t size0, void *data1, size_t size1) | |
284 | { | |
285 | unsigned long flags; | |
286 | ||
287 | event->v[0].data = data0; | |
288 | event->v[0].size = size0; | |
289 | event->v[1].data = data1; | |
290 | event->v[1].size = size1; | |
291 | ||
292 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
293 | if (client->in_shutdown) |
294 | kfree(event); | |
295 | else | |
296 | list_add_tail(&event->link, &client->event_list); | |
19a15b93 | 297 | spin_unlock_irqrestore(&client->lock, flags); |
83431cba JF |
298 | |
299 | wake_up_interruptible(&client->wait); | |
19a15b93 KH |
300 | } |
301 | ||
53dca511 SR |
302 | static int dequeue_event(struct client *client, |
303 | char __user *buffer, size_t count) | |
19a15b93 | 304 | { |
19a15b93 KH |
305 | struct event *event; |
306 | size_t size, total; | |
2dbd7d7e | 307 | int i, ret; |
19a15b93 | 308 | |
2dbd7d7e SR |
309 | ret = wait_event_interruptible(client->wait, |
310 | !list_empty(&client->event_list) || | |
311 | fw_device_is_shutdown(client->device)); | |
312 | if (ret < 0) | |
313 | return ret; | |
19a15b93 | 314 | |
2603bf21 KH |
315 | if (list_empty(&client->event_list) && |
316 | fw_device_is_shutdown(client->device)) | |
317 | return -ENODEV; | |
19a15b93 | 318 | |
3ba94986 | 319 | spin_lock_irq(&client->lock); |
a459b8ab | 320 | event = list_first_entry(&client->event_list, struct event, link); |
19a15b93 | 321 | list_del(&event->link); |
3ba94986 | 322 | spin_unlock_irq(&client->lock); |
19a15b93 | 323 | |
19a15b93 KH |
324 | total = 0; |
325 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
326 | size = min(event->v[i].size, count - total); | |
2603bf21 | 327 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
2dbd7d7e | 328 | ret = -EFAULT; |
19a15b93 | 329 | goto out; |
2603bf21 | 330 | } |
19a15b93 KH |
331 | total += size; |
332 | } | |
2dbd7d7e | 333 | ret = total; |
19a15b93 KH |
334 | |
335 | out: | |
336 | kfree(event); | |
337 | ||
2dbd7d7e | 338 | return ret; |
19a15b93 KH |
339 | } |
340 | ||
53dca511 SR |
341 | static ssize_t fw_device_op_read(struct file *file, char __user *buffer, |
342 | size_t count, loff_t *offset) | |
19a15b93 KH |
343 | { |
344 | struct client *client = file->private_data; | |
345 | ||
346 | return dequeue_event(client, buffer, count); | |
347 | } | |
348 | ||
53dca511 SR |
349 | static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, |
350 | struct client *client) | |
344bbc4d | 351 | { |
da8ecffa | 352 | struct fw_card *card = client->device->card; |
cf417e54 | 353 | |
3ba94986 | 354 | spin_lock_irq(&card->lock); |
344bbc4d | 355 | |
da8ecffa | 356 | event->closure = client->bus_reset_closure; |
344bbc4d | 357 | event->type = FW_CDEV_EVENT_BUS_RESET; |
cf5a56ac | 358 | event->generation = client->device->generation; |
da8ecffa | 359 | event->node_id = client->device->node_id; |
344bbc4d | 360 | event->local_node_id = card->local_node->node_id; |
250b2b6d | 361 | event->bm_node_id = card->bm_node_id; |
344bbc4d KH |
362 | event->irm_node_id = card->irm_node->node_id; |
363 | event->root_node_id = card->root_node->node_id; | |
cf417e54 | 364 | |
3ba94986 | 365 | spin_unlock_irq(&card->lock); |
344bbc4d KH |
366 | } |
367 | ||
53dca511 SR |
368 | static void for_each_client(struct fw_device *device, |
369 | void (*callback)(struct client *client)) | |
2603bf21 | 370 | { |
2603bf21 | 371 | struct client *c; |
2603bf21 | 372 | |
d67cfb96 | 373 | mutex_lock(&device->client_list_mutex); |
2603bf21 KH |
374 | list_for_each_entry(c, &device->client_list, link) |
375 | callback(c); | |
d67cfb96 | 376 | mutex_unlock(&device->client_list_mutex); |
2603bf21 KH |
377 | } |
378 | ||
b1bda4cd JFSR |
379 | static int schedule_reallocations(int id, void *p, void *data) |
380 | { | |
9fb551bf | 381 | schedule_if_iso_resource(p); |
b1bda4cd | 382 | |
b1bda4cd JFSR |
383 | return 0; |
384 | } | |
385 | ||
53dca511 | 386 | static void queue_bus_reset_event(struct client *client) |
97bd9efa | 387 | { |
97c18b7f | 388 | struct bus_reset_event *e; |
97bd9efa | 389 | |
97c18b7f SR |
390 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
391 | if (e == NULL) { | |
26b4950d | 392 | fw_notice(client->device->card, "out of memory when allocating event\n"); |
97bd9efa KH |
393 | return; |
394 | } | |
395 | ||
97c18b7f | 396 | fill_bus_reset_event(&e->reset, client); |
97bd9efa | 397 | |
97c18b7f SR |
398 | queue_event(client, &e->event, |
399 | &e->reset, sizeof(e->reset), NULL, 0); | |
b1bda4cd JFSR |
400 | |
401 | spin_lock_irq(&client->lock); | |
402 | idr_for_each(&client->resource_idr, schedule_reallocations, client); | |
403 | spin_unlock_irq(&client->lock); | |
97bd9efa KH |
404 | } |
405 | ||
406 | void fw_device_cdev_update(struct fw_device *device) | |
407 | { | |
2603bf21 KH |
408 | for_each_client(device, queue_bus_reset_event); |
409 | } | |
97bd9efa | 410 | |
2603bf21 KH |
411 | static void wake_up_client(struct client *client) |
412 | { | |
413 | wake_up_interruptible(&client->wait); | |
414 | } | |
97bd9efa | 415 | |
2603bf21 KH |
416 | void fw_device_cdev_remove(struct fw_device *device) |
417 | { | |
418 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
419 | } |
420 | ||
6e95dea7 SR |
421 | union ioctl_arg { |
422 | struct fw_cdev_get_info get_info; | |
423 | struct fw_cdev_send_request send_request; | |
424 | struct fw_cdev_allocate allocate; | |
425 | struct fw_cdev_deallocate deallocate; | |
426 | struct fw_cdev_send_response send_response; | |
427 | struct fw_cdev_initiate_bus_reset initiate_bus_reset; | |
428 | struct fw_cdev_add_descriptor add_descriptor; | |
429 | struct fw_cdev_remove_descriptor remove_descriptor; | |
430 | struct fw_cdev_create_iso_context create_iso_context; | |
431 | struct fw_cdev_queue_iso queue_iso; | |
432 | struct fw_cdev_start_iso start_iso; | |
433 | struct fw_cdev_stop_iso stop_iso; | |
434 | struct fw_cdev_get_cycle_timer get_cycle_timer; | |
435 | struct fw_cdev_allocate_iso_resource allocate_iso_resource; | |
436 | struct fw_cdev_send_stream_packet send_stream_packet; | |
437 | struct fw_cdev_get_cycle_timer2 get_cycle_timer2; | |
850bb6f2 | 438 | struct fw_cdev_send_phy_packet send_phy_packet; |
bf54e146 | 439 | struct fw_cdev_receive_phy_packets receive_phy_packets; |
872e330e | 440 | struct fw_cdev_set_iso_channels set_iso_channels; |
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); |
93b37905 SR |
474 | ret = copy_to_user(u64_to_uptr(a->bus_reset), |
475 | &bus_reset, sizeof(bus_reset)); | |
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 KH |
487 | { |
488 | unsigned long flags; | |
45ee3199 JF |
489 | int ret; |
490 | ||
491 | retry: | |
492 | if (idr_pre_get(&client->resource_idr, gfp_mask) == 0) | |
493 | return -ENOMEM; | |
3964a449 KH |
494 | |
495 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
496 | if (client->in_shutdown) |
497 | ret = -ECANCELED; | |
498 | else | |
499 | ret = idr_get_new(&client->resource_idr, resource, | |
500 | &resource->handle); | |
b1bda4cd | 501 | if (ret >= 0) { |
fb443036 | 502 | client_get(client); |
9fb551bf | 503 | schedule_if_iso_resource(resource); |
b1bda4cd | 504 | } |
3964a449 | 505 | spin_unlock_irqrestore(&client->lock, flags); |
45ee3199 JF |
506 | |
507 | if (ret == -EAGAIN) | |
508 | goto retry; | |
509 | ||
510 | return ret < 0 ? ret : 0; | |
3964a449 KH |
511 | } |
512 | ||
53dca511 SR |
513 | static int release_client_resource(struct client *client, u32 handle, |
514 | client_resource_release_fn_t release, | |
e21fcf79 | 515 | struct client_resource **return_resource) |
3964a449 | 516 | { |
e21fcf79 | 517 | struct client_resource *resource; |
3964a449 | 518 | |
3ba94986 | 519 | spin_lock_irq(&client->lock); |
45ee3199 | 520 | if (client->in_shutdown) |
e21fcf79 | 521 | resource = NULL; |
45ee3199 | 522 | else |
e21fcf79 SR |
523 | resource = idr_find(&client->resource_idr, handle); |
524 | if (resource && resource->release == release) | |
45ee3199 | 525 | idr_remove(&client->resource_idr, handle); |
3ba94986 | 526 | spin_unlock_irq(&client->lock); |
3964a449 | 527 | |
e21fcf79 | 528 | if (!(resource && resource->release == release)) |
3964a449 KH |
529 | return -EINVAL; |
530 | ||
e21fcf79 SR |
531 | if (return_resource) |
532 | *return_resource = resource; | |
3964a449 | 533 | else |
e21fcf79 | 534 | resource->release(client, resource); |
3964a449 | 535 | |
fb443036 SR |
536 | client_put(client); |
537 | ||
3964a449 KH |
538 | return 0; |
539 | } | |
540 | ||
53dca511 SR |
541 | static void release_transaction(struct client *client, |
542 | struct client_resource *resource) | |
3964a449 | 543 | { |
3964a449 KH |
544 | } |
545 | ||
53dca511 SR |
546 | static void complete_transaction(struct fw_card *card, int rcode, |
547 | void *payload, size_t length, void *data) | |
19a15b93 | 548 | { |
97c18b7f SR |
549 | struct outbound_transaction_event *e = data; |
550 | struct fw_cdev_event_response *rsp = &e->response; | |
551 | struct client *client = e->client; | |
28cf6a04 | 552 | unsigned long flags; |
19a15b93 | 553 | |
97c18b7f SR |
554 | if (length < rsp->length) |
555 | rsp->length = length; | |
19a15b93 | 556 | if (rcode == RCODE_COMPLETE) |
97c18b7f | 557 | memcpy(rsp->data, payload, rsp->length); |
19a15b93 | 558 | |
28cf6a04 | 559 | spin_lock_irqsave(&client->lock, flags); |
5a5e62da CL |
560 | idr_remove(&client->resource_idr, e->r.resource.handle); |
561 | if (client->in_shutdown) | |
562 | wake_up(&client->tx_flush_wait); | |
28cf6a04 KH |
563 | spin_unlock_irqrestore(&client->lock, flags); |
564 | ||
97c18b7f SR |
565 | rsp->type = FW_CDEV_EVENT_RESPONSE; |
566 | rsp->rcode = rcode; | |
8401d92b DM |
567 | |
568 | /* | |
97c18b7f | 569 | * In the case that sizeof(*rsp) doesn't align with the position of the |
8401d92b DM |
570 | * data, and the read is short, preserve an extra copy of the data |
571 | * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless | |
572 | * for short reads and some apps depended on it, this is both safe | |
573 | * and prudent for compatibility. | |
574 | */ | |
97c18b7f SR |
575 | if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data)) |
576 | queue_event(client, &e->event, rsp, sizeof(*rsp), | |
577 | rsp->data, rsp->length); | |
8401d92b | 578 | else |
97c18b7f | 579 | queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length, |
8401d92b | 580 | NULL, 0); |
fb443036 | 581 | |
5a5e62da CL |
582 | /* Drop the idr's reference */ |
583 | client_put(client); | |
19a15b93 KH |
584 | } |
585 | ||
acfe8333 JFSR |
586 | static int init_request(struct client *client, |
587 | struct fw_cdev_send_request *request, | |
588 | int destination_id, int speed) | |
19a15b93 | 589 | { |
97c18b7f | 590 | struct outbound_transaction_event *e; |
1f3125af | 591 | int ret; |
19a15b93 | 592 | |
18e9b10f SR |
593 | if (request->tcode != TCODE_STREAM_DATA && |
594 | (request->length > 4096 || request->length > 512 << speed)) | |
5d3fd692 | 595 | return -EIO; |
19a15b93 | 596 | |
a8e93f3d CL |
597 | if (request->tcode == TCODE_WRITE_QUADLET_REQUEST && |
598 | request->length < 4) | |
599 | return -EINVAL; | |
600 | ||
97c18b7f SR |
601 | e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL); |
602 | if (e == NULL) | |
19a15b93 KH |
603 | return -ENOMEM; |
604 | ||
97c18b7f SR |
605 | e->client = client; |
606 | e->response.length = request->length; | |
607 | e->response.closure = request->closure; | |
19a15b93 | 608 | |
4f259223 | 609 | if (request->data && |
97c18b7f | 610 | copy_from_user(e->response.data, |
4f259223 | 611 | u64_to_uptr(request->data), request->length)) { |
1f3125af | 612 | ret = -EFAULT; |
45ee3199 | 613 | goto failed; |
1f3125af SR |
614 | } |
615 | ||
97c18b7f SR |
616 | e->r.resource.release = release_transaction; |
617 | ret = add_client_resource(client, &e->r.resource, GFP_KERNEL); | |
45ee3199 JF |
618 | if (ret < 0) |
619 | goto failed; | |
28cf6a04 | 620 | |
acfe8333 | 621 | fw_send_request(client->device->card, &e->r.transaction, |
664d8010 SR |
622 | request->tcode, destination_id, request->generation, |
623 | speed, request->offset, e->response.data, | |
624 | request->length, complete_transaction, e); | |
625 | return 0; | |
19a15b93 | 626 | |
45ee3199 | 627 | failed: |
97c18b7f | 628 | kfree(e); |
1f3125af SR |
629 | |
630 | return ret; | |
19a15b93 KH |
631 | } |
632 | ||
6e95dea7 | 633 | static int ioctl_send_request(struct client *client, union ioctl_arg *arg) |
acfe8333 | 634 | { |
6e95dea7 | 635 | switch (arg->send_request.tcode) { |
acfe8333 JFSR |
636 | case TCODE_WRITE_QUADLET_REQUEST: |
637 | case TCODE_WRITE_BLOCK_REQUEST: | |
638 | case TCODE_READ_QUADLET_REQUEST: | |
639 | case TCODE_READ_BLOCK_REQUEST: | |
640 | case TCODE_LOCK_MASK_SWAP: | |
641 | case TCODE_LOCK_COMPARE_SWAP: | |
642 | case TCODE_LOCK_FETCH_ADD: | |
643 | case TCODE_LOCK_LITTLE_ADD: | |
644 | case TCODE_LOCK_BOUNDED_ADD: | |
645 | case TCODE_LOCK_WRAP_ADD: | |
646 | case TCODE_LOCK_VENDOR_DEPENDENT: | |
647 | break; | |
648 | default: | |
649 | return -EINVAL; | |
650 | } | |
651 | ||
6e95dea7 | 652 | return init_request(client, &arg->send_request, client->device->node_id, |
acfe8333 JFSR |
653 | client->device->max_speed); |
654 | } | |
655 | ||
281e2032 SR |
656 | static inline bool is_fcp_request(struct fw_request *request) |
657 | { | |
658 | return request == NULL; | |
659 | } | |
660 | ||
53dca511 SR |
661 | static void release_request(struct client *client, |
662 | struct client_resource *resource) | |
3964a449 | 663 | { |
97c18b7f SR |
664 | struct inbound_transaction_resource *r = container_of(resource, |
665 | struct inbound_transaction_resource, resource); | |
3964a449 | 666 | |
281e2032 SR |
667 | if (is_fcp_request(r->request)) |
668 | kfree(r->data); | |
669 | else | |
08bd34c9 | 670 | fw_send_response(r->card, r->request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
671 | |
672 | fw_card_put(r->card); | |
97c18b7f | 673 | kfree(r); |
3964a449 KH |
674 | } |
675 | ||
97c18b7f | 676 | static void handle_request(struct fw_card *card, struct fw_request *request, |
53dca511 | 677 | int tcode, int destination, int source, |
33e553fe | 678 | int generation, unsigned long long offset, |
53dca511 | 679 | void *payload, size_t length, void *callback_data) |
19a15b93 | 680 | { |
97c18b7f SR |
681 | struct address_handler_resource *handler = callback_data; |
682 | struct inbound_transaction_resource *r; | |
683 | struct inbound_transaction_event *e; | |
e205597d | 684 | size_t event_size0; |
281e2032 | 685 | void *fcp_frame = NULL; |
45ee3199 | 686 | int ret; |
19a15b93 | 687 | |
0244f573 SR |
688 | /* card may be different from handler->client->device->card */ |
689 | fw_card_get(card); | |
690 | ||
97c18b7f | 691 | r = kmalloc(sizeof(*r), GFP_ATOMIC); |
2d826cc5 | 692 | e = kmalloc(sizeof(*e), GFP_ATOMIC); |
bf54e146 | 693 | if (r == NULL || e == NULL) { |
26b4950d | 694 | fw_notice(card, "out of memory when allocating event\n"); |
45ee3199 | 695 | goto failed; |
bf54e146 | 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); |
bf54e146 | 930 | if (e == NULL) { |
26b4950d | 931 | fw_notice(context->card, "out of memory when allocating event\n"); |
19a15b93 | 932 | return; |
bf54e146 | 933 | } |
97c18b7f SR |
934 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
935 | e->interrupt.closure = client->iso_closure; | |
936 | e->interrupt.cycle = cycle; | |
937 | e->interrupt.header_length = header_length; | |
938 | memcpy(e->interrupt.header, header, header_length); | |
939 | queue_event(client, &e->event, &e->interrupt, | |
940 | sizeof(e->interrupt) + header_length, NULL, 0); | |
19a15b93 KH |
941 | } |
942 | ||
872e330e SR |
943 | static void iso_mc_callback(struct fw_iso_context *context, |
944 | dma_addr_t completed, void *data) | |
945 | { | |
946 | struct client *client = data; | |
947 | struct iso_interrupt_mc_event *e; | |
948 | ||
949 | e = kmalloc(sizeof(*e), GFP_ATOMIC); | |
950 | if (e == NULL) { | |
26b4950d | 951 | fw_notice(context->card, "out of memory when allocating event\n"); |
872e330e SR |
952 | return; |
953 | } | |
954 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL; | |
955 | e->interrupt.closure = client->iso_closure; | |
956 | e->interrupt.completed = fw_iso_buffer_lookup(&client->buffer, | |
957 | completed); | |
958 | queue_event(client, &e->event, &e->interrupt, | |
959 | sizeof(e->interrupt), NULL, 0); | |
960 | } | |
961 | ||
6e95dea7 | 962 | static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) |
19a15b93 | 963 | { |
6e95dea7 | 964 | struct fw_cdev_create_iso_context *a = &arg->create_iso_context; |
24315c5e | 965 | struct fw_iso_context *context; |
872e330e | 966 | fw_iso_callback_t cb; |
19a15b93 | 967 | |
eb5b35a5 | 968 | BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT != FW_ISO_CONTEXT_TRANSMIT || |
872e330e SR |
969 | FW_CDEV_ISO_CONTEXT_RECEIVE != FW_ISO_CONTEXT_RECEIVE || |
970 | FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL != | |
971 | FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL); | |
21efb3cf | 972 | |
6e95dea7 | 973 | switch (a->type) { |
872e330e SR |
974 | case FW_ISO_CONTEXT_TRANSMIT: |
975 | if (a->speed > SCODE_3200 || a->channel > 63) | |
c70dc788 | 976 | return -EINVAL; |
872e330e SR |
977 | |
978 | cb = iso_callback; | |
c70dc788 KH |
979 | break; |
980 | ||
872e330e SR |
981 | case FW_ISO_CONTEXT_RECEIVE: |
982 | if (a->header_size < 4 || (a->header_size & 3) || | |
983 | a->channel > 63) | |
c70dc788 | 984 | return -EINVAL; |
872e330e SR |
985 | |
986 | cb = iso_callback; | |
987 | break; | |
988 | ||
989 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
990 | cb = (fw_iso_callback_t)iso_mc_callback; | |
c70dc788 KH |
991 | break; |
992 | ||
993 | default: | |
21efb3cf | 994 | return -EINVAL; |
c70dc788 KH |
995 | } |
996 | ||
6e95dea7 | 997 | context = fw_iso_context_create(client->device->card, a->type, |
872e330e | 998 | a->channel, a->speed, a->header_size, cb, client); |
24315c5e KH |
999 | if (IS_ERR(context)) |
1000 | return PTR_ERR(context); | |
1001 | ||
bdfe273e CL |
1002 | /* We only support one context at this time. */ |
1003 | spin_lock_irq(&client->lock); | |
1004 | if (client->iso_context != NULL) { | |
1005 | spin_unlock_irq(&client->lock); | |
1006 | fw_iso_context_destroy(context); | |
1007 | return -EBUSY; | |
1008 | } | |
6e95dea7 | 1009 | client->iso_closure = a->closure; |
24315c5e | 1010 | client->iso_context = context; |
bdfe273e | 1011 | spin_unlock_irq(&client->lock); |
19a15b93 | 1012 | |
6e95dea7 | 1013 | a->handle = 0; |
abaa5743 | 1014 | |
19a15b93 KH |
1015 | return 0; |
1016 | } | |
1017 | ||
872e330e SR |
1018 | static int ioctl_set_iso_channels(struct client *client, union ioctl_arg *arg) |
1019 | { | |
1020 | struct fw_cdev_set_iso_channels *a = &arg->set_iso_channels; | |
1021 | struct fw_iso_context *ctx = client->iso_context; | |
1022 | ||
1023 | if (ctx == NULL || a->handle != 0) | |
1024 | return -EINVAL; | |
1025 | ||
1026 | return fw_iso_context_set_channels(ctx, &a->channels); | |
1027 | } | |
1028 | ||
1ca31ae7 KH |
1029 | /* Macros for decoding the iso packet control header. */ |
1030 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) | |
1031 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) | |
1032 | #define GET_SKIP(v) (((v) >> 17) & 0x01) | |
7a100344 SR |
1033 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
1034 | #define GET_SY(v) (((v) >> 20) & 0x0f) | |
1ca31ae7 KH |
1035 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
1036 | ||
6e95dea7 | 1037 | static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1038 | { |
6e95dea7 | 1039 | struct fw_cdev_queue_iso *a = &arg->queue_iso; |
19a15b93 | 1040 | struct fw_cdev_iso_packet __user *p, *end, *next; |
9b32d5f3 | 1041 | struct fw_iso_context *ctx = client->iso_context; |
872e330e | 1042 | unsigned long payload, buffer_end, transmit_header_bytes = 0; |
1ca31ae7 | 1043 | u32 control; |
19a15b93 KH |
1044 | int count; |
1045 | struct { | |
1046 | struct fw_iso_packet packet; | |
1047 | u8 header[256]; | |
1048 | } u; | |
1049 | ||
6e95dea7 | 1050 | if (ctx == NULL || a->handle != 0) |
19a15b93 | 1051 | return -EINVAL; |
19a15b93 | 1052 | |
c781c06d KH |
1053 | /* |
1054 | * If the user passes a non-NULL data pointer, has mmap()'ed | |
19a15b93 KH |
1055 | * the iso buffer, and the pointer points inside the buffer, |
1056 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 1057 | * set them both to 0, which will still let packets with |
19a15b93 KH |
1058 | * payload_length == 0 through. In other words, if no packets |
1059 | * use the indirect payload, the iso buffer need not be mapped | |
6e95dea7 | 1060 | * and the a->data pointer is ignored. |
c781c06d | 1061 | */ |
6e95dea7 | 1062 | payload = (unsigned long)a->data - client->vm_start; |
ef370ee7 | 1063 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
6e95dea7 | 1064 | if (a->data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 1065 | payload >= buffer_end) { |
9aad8125 | 1066 | payload = 0; |
ef370ee7 | 1067 | buffer_end = 0; |
19a15b93 KH |
1068 | } |
1069 | ||
872e330e SR |
1070 | if (ctx->type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL && payload & 3) |
1071 | return -EINVAL; | |
1ccc9147 | 1072 | |
872e330e | 1073 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets); |
6e95dea7 | 1074 | if (!access_ok(VERIFY_READ, p, a->size)) |
19a15b93 KH |
1075 | return -EFAULT; |
1076 | ||
6e95dea7 | 1077 | end = (void __user *)p + a->size; |
19a15b93 KH |
1078 | count = 0; |
1079 | while (p < end) { | |
1ca31ae7 | 1080 | if (get_user(control, &p->control)) |
19a15b93 | 1081 | return -EFAULT; |
1ca31ae7 KH |
1082 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
1083 | u.packet.interrupt = GET_INTERRUPT(control); | |
1084 | u.packet.skip = GET_SKIP(control); | |
1085 | u.packet.tag = GET_TAG(control); | |
1086 | u.packet.sy = GET_SY(control); | |
1087 | u.packet.header_length = GET_HEADER_LENGTH(control); | |
295e3feb | 1088 | |
872e330e SR |
1089 | switch (ctx->type) { |
1090 | case FW_ISO_CONTEXT_TRANSMIT: | |
1091 | if (u.packet.header_length & 3) | |
385ab5bc | 1092 | return -EINVAL; |
ae2a9766 | 1093 | transmit_header_bytes = u.packet.header_length; |
872e330e SR |
1094 | break; |
1095 | ||
1096 | case FW_ISO_CONTEXT_RECEIVE: | |
69e61d0c SR |
1097 | if (u.packet.header_length == 0 || |
1098 | u.packet.header_length % ctx->header_size != 0) | |
385ab5bc | 1099 | return -EINVAL; |
872e330e SR |
1100 | break; |
1101 | ||
1102 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
1103 | if (u.packet.payload_length == 0 || | |
1104 | u.packet.payload_length & 3) | |
295e3feb | 1105 | return -EINVAL; |
872e330e | 1106 | break; |
295e3feb KH |
1107 | } |
1108 | ||
19a15b93 | 1109 | next = (struct fw_cdev_iso_packet __user *) |
ae2a9766 | 1110 | &p->header[transmit_header_bytes / 4]; |
19a15b93 KH |
1111 | if (next > end) |
1112 | return -EINVAL; | |
1113 | if (__copy_from_user | |
ae2a9766 | 1114 | (u.packet.header, p->header, transmit_header_bytes)) |
19a15b93 | 1115 | return -EFAULT; |
98b6cbe8 | 1116 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
1117 | u.packet.header_length + u.packet.payload_length > 0) |
1118 | return -EINVAL; | |
ef370ee7 | 1119 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
1120 | return -EINVAL; |
1121 | ||
9b32d5f3 KH |
1122 | if (fw_iso_context_queue(ctx, &u.packet, |
1123 | &client->buffer, payload)) | |
19a15b93 KH |
1124 | break; |
1125 | ||
1126 | p = next; | |
1127 | payload += u.packet.payload_length; | |
1128 | count++; | |
1129 | } | |
13882a82 | 1130 | fw_iso_context_queue_flush(ctx); |
19a15b93 | 1131 | |
6e95dea7 SR |
1132 | a->size -= uptr_to_u64(p) - a->packets; |
1133 | a->packets = uptr_to_u64(p); | |
1134 | a->data = client->vm_start + payload; | |
19a15b93 KH |
1135 | |
1136 | return count; | |
1137 | } | |
1138 | ||
6e95dea7 | 1139 | static int ioctl_start_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1140 | { |
6e95dea7 | 1141 | struct fw_cdev_start_iso *a = &arg->start_iso; |
19a15b93 | 1142 | |
eb5b35a5 SR |
1143 | BUILD_BUG_ON( |
1144 | FW_CDEV_ISO_CONTEXT_MATCH_TAG0 != FW_ISO_CONTEXT_MATCH_TAG0 || | |
1145 | FW_CDEV_ISO_CONTEXT_MATCH_TAG1 != FW_ISO_CONTEXT_MATCH_TAG1 || | |
1146 | FW_CDEV_ISO_CONTEXT_MATCH_TAG2 != FW_ISO_CONTEXT_MATCH_TAG2 || | |
1147 | FW_CDEV_ISO_CONTEXT_MATCH_TAG3 != FW_ISO_CONTEXT_MATCH_TAG3 || | |
1148 | FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS != FW_ISO_CONTEXT_MATCH_ALL_TAGS); | |
1149 | ||
6e95dea7 | 1150 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 | 1151 | return -EINVAL; |
fae60312 | 1152 | |
6e95dea7 SR |
1153 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE && |
1154 | (a->tags == 0 || a->tags > 15 || a->sync > 15)) | |
1155 | return -EINVAL; | |
eb0306ea | 1156 | |
6e95dea7 SR |
1157 | return fw_iso_context_start(client->iso_context, |
1158 | a->cycle, a->sync, a->tags); | |
19a15b93 KH |
1159 | } |
1160 | ||
6e95dea7 | 1161 | static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg) |
b8295668 | 1162 | { |
6e95dea7 | 1163 | struct fw_cdev_stop_iso *a = &arg->stop_iso; |
abaa5743 | 1164 | |
6e95dea7 | 1165 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 KH |
1166 | return -EINVAL; |
1167 | ||
b8295668 KH |
1168 | return fw_iso_context_stop(client->iso_context); |
1169 | } | |
1170 | ||
6e95dea7 | 1171 | static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg) |
a64408b9 | 1172 | { |
6e95dea7 | 1173 | struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2; |
a64408b9 | 1174 | struct fw_card *card = client->device->card; |
abfe5a01 | 1175 | struct timespec ts = {0, 0}; |
4a9bde9b | 1176 | u32 cycle_time; |
abfe5a01 | 1177 | int ret = 0; |
a64408b9 | 1178 | |
4a9bde9b | 1179 | local_irq_disable(); |
a64408b9 | 1180 | |
0fcff4e3 | 1181 | cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME); |
abfe5a01 | 1182 | |
6e95dea7 | 1183 | switch (a->clk_id) { |
abfe5a01 SR |
1184 | case CLOCK_REALTIME: getnstimeofday(&ts); break; |
1185 | case CLOCK_MONOTONIC: do_posix_clock_monotonic_gettime(&ts); break; | |
1186 | case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts); break; | |
1187 | default: | |
1188 | ret = -EINVAL; | |
1189 | } | |
a64408b9 | 1190 | |
4a9bde9b | 1191 | local_irq_enable(); |
a64408b9 | 1192 | |
6e95dea7 SR |
1193 | a->tv_sec = ts.tv_sec; |
1194 | a->tv_nsec = ts.tv_nsec; | |
1195 | a->cycle_timer = cycle_time; | |
abfe5a01 SR |
1196 | |
1197 | return ret; | |
1198 | } | |
1199 | ||
6e95dea7 | 1200 | static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg) |
abfe5a01 | 1201 | { |
6e95dea7 | 1202 | struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer; |
abfe5a01 SR |
1203 | struct fw_cdev_get_cycle_timer2 ct2; |
1204 | ||
1205 | ct2.clk_id = CLOCK_REALTIME; | |
6e95dea7 | 1206 | ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2); |
abfe5a01 | 1207 | |
6e95dea7 SR |
1208 | a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC; |
1209 | a->cycle_timer = ct2.cycle_timer; | |
4a9bde9b | 1210 | |
a64408b9 SR |
1211 | return 0; |
1212 | } | |
1213 | ||
b1bda4cd JFSR |
1214 | static void iso_resource_work(struct work_struct *work) |
1215 | { | |
1216 | struct iso_resource_event *e; | |
1217 | struct iso_resource *r = | |
1218 | container_of(work, struct iso_resource, work.work); | |
1219 | struct client *client = r->client; | |
1220 | int generation, channel, bandwidth, todo; | |
1221 | bool skip, free, success; | |
1222 | ||
1223 | spin_lock_irq(&client->lock); | |
1224 | generation = client->device->generation; | |
1225 | todo = r->todo; | |
1226 | /* Allow 1000ms grace period for other reallocations. */ | |
1227 | if (todo == ISO_RES_ALLOC && | |
e71084af CL |
1228 | time_before64(get_jiffies_64(), |
1229 | client->device->card->reset_jiffies + HZ)) { | |
9fb551bf | 1230 | schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3)); |
b1bda4cd JFSR |
1231 | skip = true; |
1232 | } else { | |
1233 | /* We could be called twice within the same generation. */ | |
1234 | skip = todo == ISO_RES_REALLOC && | |
1235 | r->generation == generation; | |
1236 | } | |
1ec3c026 SR |
1237 | free = todo == ISO_RES_DEALLOC || |
1238 | todo == ISO_RES_ALLOC_ONCE || | |
1239 | todo == ISO_RES_DEALLOC_ONCE; | |
b1bda4cd JFSR |
1240 | r->generation = generation; |
1241 | spin_unlock_irq(&client->lock); | |
1242 | ||
1243 | if (skip) | |
1244 | goto out; | |
1245 | ||
1246 | bandwidth = r->bandwidth; | |
1247 | ||
1248 | fw_iso_resource_manage(client->device->card, generation, | |
1249 | r->channels, &channel, &bandwidth, | |
1ec3c026 SR |
1250 | todo == ISO_RES_ALLOC || |
1251 | todo == ISO_RES_REALLOC || | |
f30e6d3e | 1252 | todo == ISO_RES_ALLOC_ONCE); |
b1bda4cd JFSR |
1253 | /* |
1254 | * Is this generation outdated already? As long as this resource sticks | |
1255 | * in the idr, it will be scheduled again for a newer generation or at | |
1256 | * shutdown. | |
1257 | */ | |
1258 | if (channel == -EAGAIN && | |
1259 | (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC)) | |
1260 | goto out; | |
1261 | ||
1262 | success = channel >= 0 || bandwidth > 0; | |
1263 | ||
1264 | spin_lock_irq(&client->lock); | |
1265 | /* | |
1266 | * Transit from allocation to reallocation, except if the client | |
1267 | * requested deallocation in the meantime. | |
1268 | */ | |
1269 | if (r->todo == ISO_RES_ALLOC) | |
1270 | r->todo = ISO_RES_REALLOC; | |
1271 | /* | |
1272 | * Allocation or reallocation failure? Pull this resource out of the | |
1273 | * idr and prepare for deletion, unless the client is shutting down. | |
1274 | */ | |
1275 | if (r->todo == ISO_RES_REALLOC && !success && | |
1276 | !client->in_shutdown && | |
1277 | idr_find(&client->resource_idr, r->resource.handle)) { | |
1278 | idr_remove(&client->resource_idr, r->resource.handle); | |
1279 | client_put(client); | |
1280 | free = true; | |
1281 | } | |
1282 | spin_unlock_irq(&client->lock); | |
1283 | ||
1284 | if (todo == ISO_RES_ALLOC && channel >= 0) | |
5d9cb7d2 | 1285 | r->channels = 1ULL << channel; |
b1bda4cd JFSR |
1286 | |
1287 | if (todo == ISO_RES_REALLOC && success) | |
1288 | goto out; | |
1289 | ||
1ec3c026 | 1290 | if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) { |
b1bda4cd JFSR |
1291 | e = r->e_alloc; |
1292 | r->e_alloc = NULL; | |
1293 | } else { | |
1294 | e = r->e_dealloc; | |
1295 | r->e_dealloc = NULL; | |
1296 | } | |
e21fcf79 SR |
1297 | e->iso_resource.handle = r->resource.handle; |
1298 | e->iso_resource.channel = channel; | |
1299 | e->iso_resource.bandwidth = bandwidth; | |
b1bda4cd JFSR |
1300 | |
1301 | queue_event(client, &e->event, | |
e21fcf79 | 1302 | &e->iso_resource, sizeof(e->iso_resource), NULL, 0); |
b1bda4cd JFSR |
1303 | |
1304 | if (free) { | |
1305 | cancel_delayed_work(&r->work); | |
1306 | kfree(r->e_alloc); | |
1307 | kfree(r->e_dealloc); | |
1308 | kfree(r); | |
1309 | } | |
1310 | out: | |
1311 | client_put(client); | |
1312 | } | |
1313 | ||
b1bda4cd JFSR |
1314 | static void release_iso_resource(struct client *client, |
1315 | struct client_resource *resource) | |
1316 | { | |
1317 | struct iso_resource *r = | |
1318 | container_of(resource, struct iso_resource, resource); | |
1319 | ||
1320 | spin_lock_irq(&client->lock); | |
1321 | r->todo = ISO_RES_DEALLOC; | |
9fb551bf | 1322 | schedule_iso_resource(r, 0); |
b1bda4cd JFSR |
1323 | spin_unlock_irq(&client->lock); |
1324 | } | |
1325 | ||
1ec3c026 SR |
1326 | static int init_iso_resource(struct client *client, |
1327 | struct fw_cdev_allocate_iso_resource *request, int todo) | |
b1bda4cd | 1328 | { |
b1bda4cd JFSR |
1329 | struct iso_resource_event *e1, *e2; |
1330 | struct iso_resource *r; | |
1331 | int ret; | |
1332 | ||
1333 | if ((request->channels == 0 && request->bandwidth == 0) || | |
1334 | request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL || | |
1335 | request->bandwidth < 0) | |
1336 | return -EINVAL; | |
1337 | ||
1338 | r = kmalloc(sizeof(*r), GFP_KERNEL); | |
1339 | e1 = kmalloc(sizeof(*e1), GFP_KERNEL); | |
1340 | e2 = kmalloc(sizeof(*e2), GFP_KERNEL); | |
1341 | if (r == NULL || e1 == NULL || e2 == NULL) { | |
1342 | ret = -ENOMEM; | |
1343 | goto fail; | |
1344 | } | |
1345 | ||
1346 | INIT_DELAYED_WORK(&r->work, iso_resource_work); | |
1347 | r->client = client; | |
1ec3c026 | 1348 | r->todo = todo; |
b1bda4cd JFSR |
1349 | r->generation = -1; |
1350 | r->channels = request->channels; | |
1351 | r->bandwidth = request->bandwidth; | |
1352 | r->e_alloc = e1; | |
1353 | r->e_dealloc = e2; | |
1354 | ||
e21fcf79 SR |
1355 | e1->iso_resource.closure = request->closure; |
1356 | e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED; | |
1357 | e2->iso_resource.closure = request->closure; | |
1358 | e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED; | |
b1bda4cd | 1359 | |
1ec3c026 SR |
1360 | if (todo == ISO_RES_ALLOC) { |
1361 | r->resource.release = release_iso_resource; | |
1362 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
81610b8f SR |
1363 | if (ret < 0) |
1364 | goto fail; | |
1ec3c026 SR |
1365 | } else { |
1366 | r->resource.release = NULL; | |
1367 | r->resource.handle = -1; | |
9fb551bf | 1368 | schedule_iso_resource(r, 0); |
1ec3c026 | 1369 | } |
b1bda4cd JFSR |
1370 | request->handle = r->resource.handle; |
1371 | ||
1372 | return 0; | |
1373 | fail: | |
1374 | kfree(r); | |
1375 | kfree(e1); | |
1376 | kfree(e2); | |
1377 | ||
1378 | return ret; | |
1379 | } | |
1380 | ||
6e95dea7 SR |
1381 | static int ioctl_allocate_iso_resource(struct client *client, |
1382 | union ioctl_arg *arg) | |
1ec3c026 | 1383 | { |
6e95dea7 SR |
1384 | return init_iso_resource(client, |
1385 | &arg->allocate_iso_resource, ISO_RES_ALLOC); | |
1ec3c026 SR |
1386 | } |
1387 | ||
6e95dea7 SR |
1388 | static int ioctl_deallocate_iso_resource(struct client *client, |
1389 | union ioctl_arg *arg) | |
b1bda4cd | 1390 | { |
6e95dea7 SR |
1391 | return release_client_resource(client, |
1392 | arg->deallocate.handle, release_iso_resource, NULL); | |
b1bda4cd JFSR |
1393 | } |
1394 | ||
6e95dea7 SR |
1395 | static int ioctl_allocate_iso_resource_once(struct client *client, |
1396 | union ioctl_arg *arg) | |
1ec3c026 | 1397 | { |
6e95dea7 SR |
1398 | return init_iso_resource(client, |
1399 | &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE); | |
1ec3c026 SR |
1400 | } |
1401 | ||
6e95dea7 SR |
1402 | static int ioctl_deallocate_iso_resource_once(struct client *client, |
1403 | union ioctl_arg *arg) | |
1ec3c026 | 1404 | { |
6e95dea7 SR |
1405 | return init_iso_resource(client, |
1406 | &arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE); | |
1ec3c026 SR |
1407 | } |
1408 | ||
c8a25900 SR |
1409 | /* |
1410 | * Returns a speed code: Maximum speed to or from this device, | |
1411 | * limited by the device's link speed, the local node's link speed, | |
1412 | * and all PHY port speeds between the two links. | |
1413 | */ | |
6e95dea7 | 1414 | static int ioctl_get_speed(struct client *client, union ioctl_arg *arg) |
33580a3e | 1415 | { |
c8a25900 | 1416 | return client->device->max_speed; |
33580a3e SR |
1417 | } |
1418 | ||
6e95dea7 SR |
1419 | static int ioctl_send_broadcast_request(struct client *client, |
1420 | union ioctl_arg *arg) | |
acfe8333 | 1421 | { |
6e95dea7 | 1422 | struct fw_cdev_send_request *a = &arg->send_request; |
acfe8333 | 1423 | |
6e95dea7 | 1424 | switch (a->tcode) { |
acfe8333 JFSR |
1425 | case TCODE_WRITE_QUADLET_REQUEST: |
1426 | case TCODE_WRITE_BLOCK_REQUEST: | |
1427 | break; | |
1428 | default: | |
1429 | return -EINVAL; | |
1430 | } | |
1431 | ||
1566f3dc | 1432 | /* Security policy: Only allow accesses to Units Space. */ |
6e95dea7 | 1433 | if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END) |
1566f3dc SR |
1434 | return -EACCES; |
1435 | ||
6e95dea7 | 1436 | return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100); |
acfe8333 JFSR |
1437 | } |
1438 | ||
6e95dea7 | 1439 | static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg) |
f8c2287c | 1440 | { |
6e95dea7 | 1441 | struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet; |
18e9b10f SR |
1442 | struct fw_cdev_send_request request; |
1443 | int dest; | |
f8c2287c | 1444 | |
6e95dea7 SR |
1445 | if (a->speed > client->device->card->link_speed || |
1446 | a->length > 1024 << a->speed) | |
18e9b10f | 1447 | return -EIO; |
f8c2287c | 1448 | |
6e95dea7 | 1449 | if (a->tag > 3 || a->channel > 63 || a->sy > 15) |
18e9b10f SR |
1450 | return -EINVAL; |
1451 | ||
6e95dea7 | 1452 | dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy); |
18e9b10f | 1453 | request.tcode = TCODE_STREAM_DATA; |
6e95dea7 SR |
1454 | request.length = a->length; |
1455 | request.closure = a->closure; | |
1456 | request.data = a->data; | |
1457 | request.generation = a->generation; | |
18e9b10f | 1458 | |
6e95dea7 | 1459 | return init_request(client, &request, dest, a->speed); |
f8c2287c JF |
1460 | } |
1461 | ||
850bb6f2 SR |
1462 | static void outbound_phy_packet_callback(struct fw_packet *packet, |
1463 | struct fw_card *card, int status) | |
1464 | { | |
1465 | struct outbound_phy_packet_event *e = | |
1466 | container_of(packet, struct outbound_phy_packet_event, p); | |
1467 | ||
1468 | switch (status) { | |
1469 | /* expected: */ | |
1470 | case ACK_COMPLETE: e->phy_packet.rcode = RCODE_COMPLETE; break; | |
1471 | /* should never happen with PHY packets: */ | |
1472 | case ACK_PENDING: e->phy_packet.rcode = RCODE_COMPLETE; break; | |
1473 | case ACK_BUSY_X: | |
1474 | case ACK_BUSY_A: | |
1475 | case ACK_BUSY_B: e->phy_packet.rcode = RCODE_BUSY; break; | |
1476 | case ACK_DATA_ERROR: e->phy_packet.rcode = RCODE_DATA_ERROR; break; | |
1477 | case ACK_TYPE_ERROR: e->phy_packet.rcode = RCODE_TYPE_ERROR; break; | |
1478 | /* stale generation; cancelled; on certain controllers: no ack */ | |
1479 | default: e->phy_packet.rcode = status; break; | |
1480 | } | |
cc550216 | 1481 | e->phy_packet.data[0] = packet->timestamp; |
850bb6f2 | 1482 | |
cc550216 SR |
1483 | queue_event(e->client, &e->event, &e->phy_packet, |
1484 | sizeof(e->phy_packet) + e->phy_packet.length, NULL, 0); | |
850bb6f2 SR |
1485 | client_put(e->client); |
1486 | } | |
1487 | ||
1488 | static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg) | |
1489 | { | |
1490 | struct fw_cdev_send_phy_packet *a = &arg->send_phy_packet; | |
1491 | struct fw_card *card = client->device->card; | |
1492 | struct outbound_phy_packet_event *e; | |
1493 | ||
1494 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1495 | if (!client->device->is_local) | |
1496 | return -ENOSYS; | |
1497 | ||
cc550216 | 1498 | e = kzalloc(sizeof(*e) + 4, GFP_KERNEL); |
850bb6f2 SR |
1499 | if (e == NULL) |
1500 | return -ENOMEM; | |
1501 | ||
1502 | client_get(client); | |
1503 | e->client = client; | |
1504 | e->p.speed = SCODE_100; | |
1505 | e->p.generation = a->generation; | |
5b06db16 CL |
1506 | e->p.header[0] = TCODE_LINK_INTERNAL << 4; |
1507 | e->p.header[1] = a->data[0]; | |
1508 | e->p.header[2] = a->data[1]; | |
1509 | e->p.header_length = 12; | |
850bb6f2 SR |
1510 | e->p.callback = outbound_phy_packet_callback; |
1511 | e->phy_packet.closure = a->closure; | |
1512 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_SENT; | |
cc550216 SR |
1513 | if (is_ping_packet(a->data)) |
1514 | e->phy_packet.length = 4; | |
850bb6f2 SR |
1515 | |
1516 | card->driver->send_request(card, &e->p); | |
1517 | ||
1518 | return 0; | |
1519 | } | |
1520 | ||
bf54e146 SR |
1521 | static int ioctl_receive_phy_packets(struct client *client, union ioctl_arg *arg) |
1522 | { | |
1523 | struct fw_cdev_receive_phy_packets *a = &arg->receive_phy_packets; | |
1524 | struct fw_card *card = client->device->card; | |
1525 | ||
1526 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1527 | if (!client->device->is_local) | |
1528 | return -ENOSYS; | |
1529 | ||
1530 | spin_lock_irq(&card->lock); | |
1531 | ||
1532 | list_move_tail(&client->phy_receiver_link, &card->phy_receiver_list); | |
1533 | client->phy_receiver_closure = a->closure; | |
1534 | ||
1535 | spin_unlock_irq(&card->lock); | |
1536 | ||
1537 | return 0; | |
1538 | } | |
1539 | ||
1540 | void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p) | |
1541 | { | |
1542 | struct client *client; | |
1543 | struct inbound_phy_packet_event *e; | |
1544 | unsigned long flags; | |
1545 | ||
1546 | spin_lock_irqsave(&card->lock, flags); | |
1547 | ||
1548 | list_for_each_entry(client, &card->phy_receiver_list, phy_receiver_link) { | |
1549 | e = kmalloc(sizeof(*e) + 8, GFP_ATOMIC); | |
1550 | if (e == NULL) { | |
26b4950d | 1551 | fw_notice(card, "out of memory when allocating event\n"); |
bf54e146 SR |
1552 | break; |
1553 | } | |
1554 | e->phy_packet.closure = client->phy_receiver_closure; | |
1555 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_RECEIVED; | |
1556 | e->phy_packet.rcode = RCODE_COMPLETE; | |
1557 | e->phy_packet.length = 8; | |
1558 | e->phy_packet.data[0] = p->header[1]; | |
1559 | e->phy_packet.data[1] = p->header[2]; | |
1560 | queue_event(client, &e->event, | |
1561 | &e->phy_packet, sizeof(e->phy_packet) + 8, NULL, 0); | |
1562 | } | |
1563 | ||
1564 | spin_unlock_irqrestore(&card->lock, flags); | |
1565 | } | |
1566 | ||
6e95dea7 | 1567 | static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = { |
b9dc61cf SR |
1568 | [0x00] = ioctl_get_info, |
1569 | [0x01] = ioctl_send_request, | |
1570 | [0x02] = ioctl_allocate, | |
1571 | [0x03] = ioctl_deallocate, | |
1572 | [0x04] = ioctl_send_response, | |
1573 | [0x05] = ioctl_initiate_bus_reset, | |
1574 | [0x06] = ioctl_add_descriptor, | |
1575 | [0x07] = ioctl_remove_descriptor, | |
1576 | [0x08] = ioctl_create_iso_context, | |
1577 | [0x09] = ioctl_queue_iso, | |
1578 | [0x0a] = ioctl_start_iso, | |
1579 | [0x0b] = ioctl_stop_iso, | |
1580 | [0x0c] = ioctl_get_cycle_timer, | |
1581 | [0x0d] = ioctl_allocate_iso_resource, | |
1582 | [0x0e] = ioctl_deallocate_iso_resource, | |
1583 | [0x0f] = ioctl_allocate_iso_resource_once, | |
1584 | [0x10] = ioctl_deallocate_iso_resource_once, | |
1585 | [0x11] = ioctl_get_speed, | |
1586 | [0x12] = ioctl_send_broadcast_request, | |
1587 | [0x13] = ioctl_send_stream_packet, | |
1588 | [0x14] = ioctl_get_cycle_timer2, | |
850bb6f2 | 1589 | [0x15] = ioctl_send_phy_packet, |
bf54e146 | 1590 | [0x16] = ioctl_receive_phy_packets, |
872e330e | 1591 | [0x17] = ioctl_set_iso_channels, |
4f259223 KH |
1592 | }; |
1593 | ||
53dca511 SR |
1594 | static int dispatch_ioctl(struct client *client, |
1595 | unsigned int cmd, void __user *arg) | |
19a15b93 | 1596 | { |
6e95dea7 | 1597 | union ioctl_arg buffer; |
2dbd7d7e | 1598 | int ret; |
4f259223 | 1599 | |
64582298 SR |
1600 | if (fw_device_is_shutdown(client->device)) |
1601 | return -ENODEV; | |
1602 | ||
4f259223 | 1603 | if (_IOC_TYPE(cmd) != '#' || |
9cac00b8 SR |
1604 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) || |
1605 | _IOC_SIZE(cmd) > sizeof(buffer)) | |
d873d794 | 1606 | return -ENOTTY; |
4f259223 | 1607 | |
9cac00b8 SR |
1608 | if (_IOC_DIR(cmd) == _IOC_READ) |
1609 | memset(&buffer, 0, _IOC_SIZE(cmd)); | |
1610 | ||
1611 | if (_IOC_DIR(cmd) & _IOC_WRITE) | |
1612 | if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd))) | |
4f259223 | 1613 | return -EFAULT; |
4f259223 | 1614 | |
6e95dea7 | 1615 | ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer); |
2dbd7d7e SR |
1616 | if (ret < 0) |
1617 | return ret; | |
4f259223 | 1618 | |
9cac00b8 SR |
1619 | if (_IOC_DIR(cmd) & _IOC_READ) |
1620 | if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd))) | |
4f259223 | 1621 | return -EFAULT; |
4f259223 | 1622 | |
2dbd7d7e | 1623 | return ret; |
19a15b93 KH |
1624 | } |
1625 | ||
53dca511 SR |
1626 | static long fw_device_op_ioctl(struct file *file, |
1627 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1628 | { |
64582298 | 1629 | return dispatch_ioctl(file->private_data, cmd, (void __user *)arg); |
19a15b93 KH |
1630 | } |
1631 | ||
1632 | #ifdef CONFIG_COMPAT | |
53dca511 SR |
1633 | static long fw_device_op_compat_ioctl(struct file *file, |
1634 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1635 | { |
64582298 | 1636 | return dispatch_ioctl(file->private_data, cmd, compat_ptr(arg)); |
19a15b93 KH |
1637 | } |
1638 | #endif | |
1639 | ||
1640 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
1641 | { | |
1642 | struct client *client = file->private_data; | |
9aad8125 KH |
1643 | enum dma_data_direction direction; |
1644 | unsigned long size; | |
2dbd7d7e | 1645 | int page_count, ret; |
9aad8125 | 1646 | |
551f4cb9 JF |
1647 | if (fw_device_is_shutdown(client->device)) |
1648 | return -ENODEV; | |
1649 | ||
9aad8125 KH |
1650 | /* FIXME: We could support multiple buffers, but we don't. */ |
1651 | if (client->buffer.pages != NULL) | |
1652 | return -EBUSY; | |
1653 | ||
1654 | if (!(vma->vm_flags & VM_SHARED)) | |
1655 | return -EINVAL; | |
19a15b93 | 1656 | |
9aad8125 | 1657 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
1658 | return -EINVAL; |
1659 | ||
1660 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
1661 | size = vma->vm_end - vma->vm_start; |
1662 | page_count = size >> PAGE_SHIFT; | |
1663 | if (size & ~PAGE_MASK) | |
1664 | return -EINVAL; | |
1665 | ||
1666 | if (vma->vm_flags & VM_WRITE) | |
1667 | direction = DMA_TO_DEVICE; | |
1668 | else | |
1669 | direction = DMA_FROM_DEVICE; | |
1670 | ||
2dbd7d7e SR |
1671 | ret = fw_iso_buffer_init(&client->buffer, client->device->card, |
1672 | page_count, direction); | |
1673 | if (ret < 0) | |
1674 | return ret; | |
19a15b93 | 1675 | |
2dbd7d7e SR |
1676 | ret = fw_iso_buffer_map(&client->buffer, vma); |
1677 | if (ret < 0) | |
9aad8125 KH |
1678 | fw_iso_buffer_destroy(&client->buffer, client->device->card); |
1679 | ||
2dbd7d7e | 1680 | return ret; |
19a15b93 KH |
1681 | } |
1682 | ||
5a5e62da CL |
1683 | static int is_outbound_transaction_resource(int id, void *p, void *data) |
1684 | { | |
1685 | struct client_resource *resource = p; | |
1686 | ||
1687 | return resource->release == release_transaction; | |
1688 | } | |
1689 | ||
1690 | static int has_outbound_transactions(struct client *client) | |
1691 | { | |
1692 | int ret; | |
1693 | ||
1694 | spin_lock_irq(&client->lock); | |
1695 | ret = idr_for_each(&client->resource_idr, | |
1696 | is_outbound_transaction_resource, NULL); | |
1697 | spin_unlock_irq(&client->lock); | |
1698 | ||
1699 | return ret; | |
1700 | } | |
1701 | ||
45ee3199 JF |
1702 | static int shutdown_resource(int id, void *p, void *data) |
1703 | { | |
e21fcf79 | 1704 | struct client_resource *resource = p; |
45ee3199 JF |
1705 | struct client *client = data; |
1706 | ||
e21fcf79 | 1707 | resource->release(client, resource); |
fb443036 | 1708 | client_put(client); |
45ee3199 JF |
1709 | |
1710 | return 0; | |
1711 | } | |
1712 | ||
19a15b93 KH |
1713 | static int fw_device_op_release(struct inode *inode, struct file *file) |
1714 | { | |
1715 | struct client *client = file->private_data; | |
e21fcf79 | 1716 | struct event *event, *next_event; |
19a15b93 | 1717 | |
bf54e146 SR |
1718 | spin_lock_irq(&client->device->card->lock); |
1719 | list_del(&client->phy_receiver_link); | |
1720 | spin_unlock_irq(&client->device->card->lock); | |
1721 | ||
97811e34 SR |
1722 | mutex_lock(&client->device->client_list_mutex); |
1723 | list_del(&client->link); | |
1724 | mutex_unlock(&client->device->client_list_mutex); | |
1725 | ||
19a15b93 KH |
1726 | if (client->iso_context) |
1727 | fw_iso_context_destroy(client->iso_context); | |
1728 | ||
36a755cf SR |
1729 | if (client->buffer.pages) |
1730 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
1731 | ||
45ee3199 | 1732 | /* Freeze client->resource_idr and client->event_list */ |
3ba94986 | 1733 | spin_lock_irq(&client->lock); |
45ee3199 | 1734 | client->in_shutdown = true; |
3ba94986 | 1735 | spin_unlock_irq(&client->lock); |
66dea3e5 | 1736 | |
5a5e62da CL |
1737 | wait_event(client->tx_flush_wait, !has_outbound_transactions(client)); |
1738 | ||
45ee3199 JF |
1739 | idr_for_each(&client->resource_idr, shutdown_resource, client); |
1740 | idr_remove_all(&client->resource_idr); | |
1741 | idr_destroy(&client->resource_idr); | |
28cf6a04 | 1742 | |
e21fcf79 SR |
1743 | list_for_each_entry_safe(event, next_event, &client->event_list, link) |
1744 | kfree(event); | |
19a15b93 | 1745 | |
fb443036 | 1746 | client_put(client); |
19a15b93 KH |
1747 | |
1748 | return 0; | |
1749 | } | |
1750 | ||
1751 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
1752 | { | |
1753 | struct client *client = file->private_data; | |
2603bf21 | 1754 | unsigned int mask = 0; |
19a15b93 KH |
1755 | |
1756 | poll_wait(file, &client->wait, pt); | |
1757 | ||
2603bf21 KH |
1758 | if (fw_device_is_shutdown(client->device)) |
1759 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 1760 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
1761 | mask |= POLLIN | POLLRDNORM; |
1762 | ||
1763 | return mask; | |
19a15b93 KH |
1764 | } |
1765 | ||
21ebcd12 | 1766 | const struct file_operations fw_device_ops = { |
19a15b93 | 1767 | .owner = THIS_MODULE, |
3ac26b2e | 1768 | .llseek = no_llseek, |
19a15b93 KH |
1769 | .open = fw_device_op_open, |
1770 | .read = fw_device_op_read, | |
1771 | .unlocked_ioctl = fw_device_op_ioctl, | |
19a15b93 | 1772 | .mmap = fw_device_op_mmap, |
3ac26b2e SR |
1773 | .release = fw_device_op_release, |
1774 | .poll = fw_device_op_poll, | |
19a15b93 | 1775 | #ifdef CONFIG_COMPAT |
5af4e5ea | 1776 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
1777 | #endif |
1778 | }; |