Commit | Line | Data |
---|---|---|
c781c06d KH |
1 | /* |
2 | * Char device for device raw access | |
19a15b93 | 3 | * |
c781c06d | 4 | * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> |
19a15b93 KH |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software Foundation, | |
18 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | */ | |
20 | ||
eb5b35a5 | 21 | #include <linux/bug.h> |
be5bbd67 SR |
22 | #include <linux/compat.h> |
23 | #include <linux/delay.h> | |
24 | #include <linux/device.h> | |
0b6c4857 | 25 | #include <linux/dma-mapping.h> |
be5bbd67 | 26 | #include <linux/errno.h> |
77c9a5da | 27 | #include <linux/firewire.h> |
be5bbd67 SR |
28 | #include <linux/firewire-cdev.h> |
29 | #include <linux/idr.h> | |
4a9bde9b | 30 | #include <linux/irqflags.h> |
b1bda4cd | 31 | #include <linux/jiffies.h> |
19a15b93 | 32 | #include <linux/kernel.h> |
fb443036 | 33 | #include <linux/kref.h> |
be5bbd67 SR |
34 | #include <linux/mm.h> |
35 | #include <linux/module.h> | |
d67cfb96 | 36 | #include <linux/mutex.h> |
19a15b93 | 37 | #include <linux/poll.h> |
ae2a9766 | 38 | #include <linux/sched.h> /* required for linux/wait.h */ |
5a0e3ad6 | 39 | #include <linux/slab.h> |
cf417e54 | 40 | #include <linux/spinlock.h> |
281e2032 | 41 | #include <linux/string.h> |
be5bbd67 | 42 | #include <linux/time.h> |
e034d242 | 43 | #include <linux/uaccess.h> |
be5bbd67 SR |
44 | #include <linux/vmalloc.h> |
45 | #include <linux/wait.h> | |
b1bda4cd | 46 | #include <linux/workqueue.h> |
be5bbd67 | 47 | |
be5bbd67 | 48 | |
77c9a5da | 49 | #include "core.h" |
19a15b93 | 50 | |
604f4516 SR |
51 | /* |
52 | * ABI version history is documented in linux/firewire-cdev.h. | |
53 | */ | |
18d62711 | 54 | #define FW_CDEV_KERNEL_VERSION 5 |
8e2b2b46 SR |
55 | #define FW_CDEV_VERSION_EVENT_REQUEST2 4 |
56 | #define FW_CDEV_VERSION_ALLOCATE_REGION_END 4 | |
604f4516 | 57 | |
19a15b93 | 58 | struct client { |
344bbc4d | 59 | u32 version; |
19a15b93 | 60 | struct fw_device *device; |
45ee3199 | 61 | |
19a15b93 | 62 | spinlock_t lock; |
45ee3199 JF |
63 | bool in_shutdown; |
64 | struct idr resource_idr; | |
19a15b93 | 65 | struct list_head event_list; |
19a15b93 | 66 | wait_queue_head_t wait; |
5a5e62da | 67 | wait_queue_head_t tx_flush_wait; |
da8ecffa | 68 | u64 bus_reset_closure; |
9aad8125 | 69 | |
19a15b93 | 70 | struct fw_iso_context *iso_context; |
abaa5743 | 71 | u64 iso_closure; |
9aad8125 KH |
72 | struct fw_iso_buffer buffer; |
73 | unsigned long vm_start; | |
0b6c4857 | 74 | bool buffer_is_mapped; |
97bd9efa | 75 | |
bf54e146 SR |
76 | struct list_head phy_receiver_link; |
77 | u64 phy_receiver_closure; | |
78 | ||
97bd9efa | 79 | struct list_head link; |
fb443036 | 80 | struct kref kref; |
19a15b93 KH |
81 | }; |
82 | ||
fb443036 SR |
83 | static inline void client_get(struct client *client) |
84 | { | |
85 | kref_get(&client->kref); | |
86 | } | |
87 | ||
88 | static void client_release(struct kref *kref) | |
89 | { | |
90 | struct client *client = container_of(kref, struct client, kref); | |
91 | ||
92 | fw_device_put(client->device); | |
93 | kfree(client); | |
94 | } | |
95 | ||
96 | static void client_put(struct client *client) | |
97 | { | |
98 | kref_put(&client->kref, client_release); | |
99 | } | |
100 | ||
97c18b7f SR |
101 | struct client_resource; |
102 | typedef void (*client_resource_release_fn_t)(struct client *, | |
103 | struct client_resource *); | |
104 | struct client_resource { | |
105 | client_resource_release_fn_t release; | |
106 | int handle; | |
107 | }; | |
108 | ||
109 | struct address_handler_resource { | |
110 | struct client_resource resource; | |
111 | struct fw_address_handler handler; | |
112 | __u64 closure; | |
113 | struct client *client; | |
114 | }; | |
115 | ||
116 | struct outbound_transaction_resource { | |
117 | struct client_resource resource; | |
118 | struct fw_transaction transaction; | |
119 | }; | |
120 | ||
121 | struct inbound_transaction_resource { | |
122 | struct client_resource resource; | |
08bd34c9 | 123 | struct fw_card *card; |
97c18b7f SR |
124 | struct fw_request *request; |
125 | void *data; | |
126 | size_t length; | |
127 | }; | |
128 | ||
129 | struct descriptor_resource { | |
130 | struct client_resource resource; | |
131 | struct fw_descriptor descriptor; | |
132 | u32 data[0]; | |
133 | }; | |
134 | ||
b1bda4cd JFSR |
135 | struct iso_resource { |
136 | struct client_resource resource; | |
137 | struct client *client; | |
138 | /* Schedule work and access todo only with client->lock held. */ | |
139 | struct delayed_work work; | |
1ec3c026 SR |
140 | enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC, |
141 | ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo; | |
b1bda4cd JFSR |
142 | int generation; |
143 | u64 channels; | |
144 | s32 bandwidth; | |
145 | struct iso_resource_event *e_alloc, *e_dealloc; | |
146 | }; | |
147 | ||
b1bda4cd JFSR |
148 | static void release_iso_resource(struct client *, struct client_resource *); |
149 | ||
9fb551bf SR |
150 | static void schedule_iso_resource(struct iso_resource *r, unsigned long delay) |
151 | { | |
152 | client_get(r->client); | |
105e53f8 | 153 | if (!queue_delayed_work(fw_workqueue, &r->work, delay)) |
9fb551bf SR |
154 | client_put(r->client); |
155 | } | |
156 | ||
157 | static void schedule_if_iso_resource(struct client_resource *resource) | |
158 | { | |
159 | if (resource->release == release_iso_resource) | |
160 | schedule_iso_resource(container_of(resource, | |
161 | struct iso_resource, resource), 0); | |
162 | } | |
163 | ||
97c18b7f SR |
164 | /* |
165 | * dequeue_event() just kfree()'s the event, so the event has to be | |
166 | * the first field in a struct XYZ_event. | |
167 | */ | |
168 | struct event { | |
169 | struct { void *data; size_t size; } v[2]; | |
170 | struct list_head link; | |
171 | }; | |
172 | ||
173 | struct bus_reset_event { | |
174 | struct event event; | |
175 | struct fw_cdev_event_bus_reset reset; | |
176 | }; | |
177 | ||
178 | struct outbound_transaction_event { | |
179 | struct event event; | |
180 | struct client *client; | |
181 | struct outbound_transaction_resource r; | |
182 | struct fw_cdev_event_response response; | |
183 | }; | |
184 | ||
185 | struct inbound_transaction_event { | |
186 | struct event event; | |
e205597d SR |
187 | union { |
188 | struct fw_cdev_event_request request; | |
189 | struct fw_cdev_event_request2 request2; | |
190 | } req; | |
97c18b7f SR |
191 | }; |
192 | ||
193 | struct iso_interrupt_event { | |
194 | struct event event; | |
195 | struct fw_cdev_event_iso_interrupt interrupt; | |
196 | }; | |
197 | ||
872e330e SR |
198 | struct iso_interrupt_mc_event { |
199 | struct event event; | |
200 | struct fw_cdev_event_iso_interrupt_mc interrupt; | |
201 | }; | |
202 | ||
b1bda4cd JFSR |
203 | struct iso_resource_event { |
204 | struct event event; | |
e21fcf79 | 205 | struct fw_cdev_event_iso_resource iso_resource; |
b1bda4cd JFSR |
206 | }; |
207 | ||
850bb6f2 SR |
208 | struct outbound_phy_packet_event { |
209 | struct event event; | |
210 | struct client *client; | |
211 | struct fw_packet p; | |
212 | struct fw_cdev_event_phy_packet phy_packet; | |
213 | }; | |
214 | ||
bf54e146 SR |
215 | struct inbound_phy_packet_event { |
216 | struct event event; | |
217 | struct fw_cdev_event_phy_packet phy_packet; | |
218 | }; | |
219 | ||
9c1176b6 SR |
220 | #ifdef CONFIG_COMPAT |
221 | static void __user *u64_to_uptr(u64 value) | |
222 | { | |
223 | if (is_compat_task()) | |
224 | return compat_ptr(value); | |
225 | else | |
226 | return (void __user *)(unsigned long)value; | |
227 | } | |
228 | ||
229 | static u64 uptr_to_u64(void __user *ptr) | |
230 | { | |
231 | if (is_compat_task()) | |
232 | return ptr_to_compat(ptr); | |
233 | else | |
234 | return (u64)(unsigned long)ptr; | |
235 | } | |
236 | #else | |
237 | static inline void __user *u64_to_uptr(u64 value) | |
19a15b93 KH |
238 | { |
239 | return (void __user *)(unsigned long)value; | |
240 | } | |
241 | ||
9c1176b6 | 242 | static inline u64 uptr_to_u64(void __user *ptr) |
19a15b93 | 243 | { |
9c1176b6 | 244 | return (u64)(unsigned long)ptr; |
19a15b93 | 245 | } |
9c1176b6 | 246 | #endif /* CONFIG_COMPAT */ |
19a15b93 KH |
247 | |
248 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
249 | { | |
250 | struct fw_device *device; | |
251 | struct client *client; | |
252 | ||
96b19062 | 253 | device = fw_device_get_by_devt(inode->i_rdev); |
a3aca3da KH |
254 | if (device == NULL) |
255 | return -ENODEV; | |
19a15b93 | 256 | |
551f4cb9 JF |
257 | if (fw_device_is_shutdown(device)) { |
258 | fw_device_put(device); | |
259 | return -ENODEV; | |
260 | } | |
261 | ||
2d826cc5 | 262 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
96b19062 SR |
263 | if (client == NULL) { |
264 | fw_device_put(device); | |
19a15b93 | 265 | return -ENOMEM; |
96b19062 | 266 | } |
19a15b93 | 267 | |
96b19062 | 268 | client->device = device; |
19a15b93 | 269 | spin_lock_init(&client->lock); |
45ee3199 JF |
270 | idr_init(&client->resource_idr); |
271 | INIT_LIST_HEAD(&client->event_list); | |
19a15b93 | 272 | init_waitqueue_head(&client->wait); |
5a5e62da | 273 | init_waitqueue_head(&client->tx_flush_wait); |
bf54e146 | 274 | INIT_LIST_HEAD(&client->phy_receiver_link); |
93b37905 | 275 | INIT_LIST_HEAD(&client->link); |
fb443036 | 276 | kref_init(&client->kref); |
19a15b93 KH |
277 | |
278 | file->private_data = client; | |
279 | ||
3ac26b2e | 280 | return nonseekable_open(inode, file); |
19a15b93 KH |
281 | } |
282 | ||
283 | static void queue_event(struct client *client, struct event *event, | |
284 | void *data0, size_t size0, void *data1, size_t size1) | |
285 | { | |
286 | unsigned long flags; | |
287 | ||
288 | event->v[0].data = data0; | |
289 | event->v[0].size = size0; | |
290 | event->v[1].data = data1; | |
291 | event->v[1].size = size1; | |
292 | ||
293 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
294 | if (client->in_shutdown) |
295 | kfree(event); | |
296 | else | |
297 | list_add_tail(&event->link, &client->event_list); | |
19a15b93 | 298 | spin_unlock_irqrestore(&client->lock, flags); |
83431cba JF |
299 | |
300 | wake_up_interruptible(&client->wait); | |
19a15b93 KH |
301 | } |
302 | ||
53dca511 SR |
303 | static int dequeue_event(struct client *client, |
304 | char __user *buffer, size_t count) | |
19a15b93 | 305 | { |
19a15b93 KH |
306 | struct event *event; |
307 | size_t size, total; | |
2dbd7d7e | 308 | int i, ret; |
19a15b93 | 309 | |
2dbd7d7e SR |
310 | ret = wait_event_interruptible(client->wait, |
311 | !list_empty(&client->event_list) || | |
312 | fw_device_is_shutdown(client->device)); | |
313 | if (ret < 0) | |
314 | return ret; | |
19a15b93 | 315 | |
2603bf21 KH |
316 | if (list_empty(&client->event_list) && |
317 | fw_device_is_shutdown(client->device)) | |
318 | return -ENODEV; | |
19a15b93 | 319 | |
3ba94986 | 320 | spin_lock_irq(&client->lock); |
a459b8ab | 321 | event = list_first_entry(&client->event_list, struct event, link); |
19a15b93 | 322 | list_del(&event->link); |
3ba94986 | 323 | spin_unlock_irq(&client->lock); |
19a15b93 | 324 | |
19a15b93 KH |
325 | total = 0; |
326 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
327 | size = min(event->v[i].size, count - total); | |
2603bf21 | 328 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
2dbd7d7e | 329 | ret = -EFAULT; |
19a15b93 | 330 | goto out; |
2603bf21 | 331 | } |
19a15b93 KH |
332 | total += size; |
333 | } | |
2dbd7d7e | 334 | ret = total; |
19a15b93 KH |
335 | |
336 | out: | |
337 | kfree(event); | |
338 | ||
2dbd7d7e | 339 | return ret; |
19a15b93 KH |
340 | } |
341 | ||
53dca511 SR |
342 | static ssize_t fw_device_op_read(struct file *file, char __user *buffer, |
343 | size_t count, loff_t *offset) | |
19a15b93 KH |
344 | { |
345 | struct client *client = file->private_data; | |
346 | ||
347 | return dequeue_event(client, buffer, count); | |
348 | } | |
349 | ||
53dca511 SR |
350 | static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, |
351 | struct client *client) | |
344bbc4d | 352 | { |
da8ecffa | 353 | struct fw_card *card = client->device->card; |
cf417e54 | 354 | |
3ba94986 | 355 | spin_lock_irq(&card->lock); |
344bbc4d | 356 | |
da8ecffa | 357 | event->closure = client->bus_reset_closure; |
344bbc4d | 358 | event->type = FW_CDEV_EVENT_BUS_RESET; |
cf5a56ac | 359 | event->generation = client->device->generation; |
da8ecffa | 360 | event->node_id = client->device->node_id; |
344bbc4d | 361 | event->local_node_id = card->local_node->node_id; |
250b2b6d | 362 | event->bm_node_id = card->bm_node_id; |
344bbc4d KH |
363 | event->irm_node_id = card->irm_node->node_id; |
364 | event->root_node_id = card->root_node->node_id; | |
cf417e54 | 365 | |
3ba94986 | 366 | spin_unlock_irq(&card->lock); |
344bbc4d KH |
367 | } |
368 | ||
53dca511 SR |
369 | static void for_each_client(struct fw_device *device, |
370 | void (*callback)(struct client *client)) | |
2603bf21 | 371 | { |
2603bf21 | 372 | struct client *c; |
2603bf21 | 373 | |
d67cfb96 | 374 | mutex_lock(&device->client_list_mutex); |
2603bf21 KH |
375 | list_for_each_entry(c, &device->client_list, link) |
376 | callback(c); | |
d67cfb96 | 377 | mutex_unlock(&device->client_list_mutex); |
2603bf21 KH |
378 | } |
379 | ||
b1bda4cd JFSR |
380 | static int schedule_reallocations(int id, void *p, void *data) |
381 | { | |
9fb551bf | 382 | schedule_if_iso_resource(p); |
b1bda4cd | 383 | |
b1bda4cd JFSR |
384 | return 0; |
385 | } | |
386 | ||
53dca511 | 387 | static void queue_bus_reset_event(struct client *client) |
97bd9efa | 388 | { |
97c18b7f | 389 | struct bus_reset_event *e; |
97bd9efa | 390 | |
97c18b7f SR |
391 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
392 | if (e == NULL) { | |
26b4950d | 393 | fw_notice(client->device->card, "out of memory when allocating event\n"); |
97bd9efa KH |
394 | return; |
395 | } | |
396 | ||
97c18b7f | 397 | fill_bus_reset_event(&e->reset, client); |
97bd9efa | 398 | |
97c18b7f SR |
399 | queue_event(client, &e->event, |
400 | &e->reset, sizeof(e->reset), NULL, 0); | |
b1bda4cd JFSR |
401 | |
402 | spin_lock_irq(&client->lock); | |
403 | idr_for_each(&client->resource_idr, schedule_reallocations, client); | |
404 | spin_unlock_irq(&client->lock); | |
97bd9efa KH |
405 | } |
406 | ||
407 | void fw_device_cdev_update(struct fw_device *device) | |
408 | { | |
2603bf21 KH |
409 | for_each_client(device, queue_bus_reset_event); |
410 | } | |
97bd9efa | 411 | |
2603bf21 KH |
412 | static void wake_up_client(struct client *client) |
413 | { | |
414 | wake_up_interruptible(&client->wait); | |
415 | } | |
97bd9efa | 416 | |
2603bf21 KH |
417 | void fw_device_cdev_remove(struct fw_device *device) |
418 | { | |
419 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
420 | } |
421 | ||
6e95dea7 SR |
422 | union ioctl_arg { |
423 | struct fw_cdev_get_info get_info; | |
424 | struct fw_cdev_send_request send_request; | |
425 | struct fw_cdev_allocate allocate; | |
426 | struct fw_cdev_deallocate deallocate; | |
427 | struct fw_cdev_send_response send_response; | |
428 | struct fw_cdev_initiate_bus_reset initiate_bus_reset; | |
429 | struct fw_cdev_add_descriptor add_descriptor; | |
430 | struct fw_cdev_remove_descriptor remove_descriptor; | |
431 | struct fw_cdev_create_iso_context create_iso_context; | |
432 | struct fw_cdev_queue_iso queue_iso; | |
433 | struct fw_cdev_start_iso start_iso; | |
434 | struct fw_cdev_stop_iso stop_iso; | |
435 | struct fw_cdev_get_cycle_timer get_cycle_timer; | |
436 | struct fw_cdev_allocate_iso_resource allocate_iso_resource; | |
437 | struct fw_cdev_send_stream_packet send_stream_packet; | |
438 | struct fw_cdev_get_cycle_timer2 get_cycle_timer2; | |
850bb6f2 | 439 | struct fw_cdev_send_phy_packet send_phy_packet; |
bf54e146 | 440 | struct fw_cdev_receive_phy_packets receive_phy_packets; |
872e330e | 441 | struct fw_cdev_set_iso_channels set_iso_channels; |
d1bbd209 | 442 | struct fw_cdev_flush_iso flush_iso; |
6e95dea7 SR |
443 | }; |
444 | ||
445 | static int ioctl_get_info(struct client *client, union ioctl_arg *arg) | |
19a15b93 | 446 | { |
6e95dea7 | 447 | struct fw_cdev_get_info *a = &arg->get_info; |
344bbc4d | 448 | struct fw_cdev_event_bus_reset bus_reset; |
c9755e14 | 449 | unsigned long ret = 0; |
344bbc4d | 450 | |
6e95dea7 | 451 | client->version = a->version; |
604f4516 | 452 | a->version = FW_CDEV_KERNEL_VERSION; |
6e95dea7 | 453 | a->card = client->device->card->index; |
344bbc4d | 454 | |
c9755e14 SR |
455 | down_read(&fw_device_rwsem); |
456 | ||
6e95dea7 SR |
457 | if (a->rom != 0) { |
458 | size_t want = a->rom_length; | |
d84702a5 | 459 | size_t have = client->device->config_rom_length * 4; |
344bbc4d | 460 | |
6e95dea7 SR |
461 | ret = copy_to_user(u64_to_uptr(a->rom), |
462 | client->device->config_rom, min(want, have)); | |
344bbc4d | 463 | } |
6e95dea7 | 464 | a->rom_length = client->device->config_rom_length * 4; |
344bbc4d | 465 | |
c9755e14 SR |
466 | up_read(&fw_device_rwsem); |
467 | ||
468 | if (ret != 0) | |
469 | return -EFAULT; | |
470 | ||
93b37905 SR |
471 | mutex_lock(&client->device->client_list_mutex); |
472 | ||
6e95dea7 SR |
473 | client->bus_reset_closure = a->bus_reset_closure; |
474 | if (a->bus_reset != 0) { | |
da8ecffa | 475 | fill_bus_reset_event(&bus_reset, client); |
790198f7 SR |
476 | /* unaligned size of bus_reset is 36 bytes */ |
477 | ret = copy_to_user(u64_to_uptr(a->bus_reset), &bus_reset, 36); | |
344bbc4d | 478 | } |
93b37905 SR |
479 | if (ret == 0 && list_empty(&client->link)) |
480 | list_add_tail(&client->link, &client->device->client_list); | |
19a15b93 | 481 | |
93b37905 SR |
482 | mutex_unlock(&client->device->client_list_mutex); |
483 | ||
484 | return ret ? -EFAULT : 0; | |
19a15b93 KH |
485 | } |
486 | ||
53dca511 SR |
487 | static int add_client_resource(struct client *client, |
488 | struct client_resource *resource, gfp_t gfp_mask) | |
3964a449 | 489 | { |
37b61890 | 490 | bool preload = gfp_mask & __GFP_WAIT; |
3964a449 | 491 | unsigned long flags; |
45ee3199 JF |
492 | int ret; |
493 | ||
37b61890 TH |
494 | if (preload) |
495 | idr_preload(gfp_mask); | |
3964a449 | 496 | spin_lock_irqsave(&client->lock, flags); |
37b61890 | 497 | |
45ee3199 JF |
498 | if (client->in_shutdown) |
499 | ret = -ECANCELED; | |
500 | else | |
37b61890 TH |
501 | ret = idr_alloc(&client->resource_idr, resource, 0, 0, |
502 | GFP_NOWAIT); | |
b1bda4cd | 503 | if (ret >= 0) { |
37b61890 | 504 | resource->handle = ret; |
fb443036 | 505 | client_get(client); |
9fb551bf | 506 | schedule_if_iso_resource(resource); |
b1bda4cd | 507 | } |
45ee3199 | 508 | |
37b61890 TH |
509 | spin_unlock_irqrestore(&client->lock, flags); |
510 | if (preload) | |
511 | idr_preload_end(); | |
45ee3199 JF |
512 | |
513 | return ret < 0 ? ret : 0; | |
3964a449 KH |
514 | } |
515 | ||
53dca511 SR |
516 | static int release_client_resource(struct client *client, u32 handle, |
517 | client_resource_release_fn_t release, | |
e21fcf79 | 518 | struct client_resource **return_resource) |
3964a449 | 519 | { |
e21fcf79 | 520 | struct client_resource *resource; |
3964a449 | 521 | |
3ba94986 | 522 | spin_lock_irq(&client->lock); |
45ee3199 | 523 | if (client->in_shutdown) |
e21fcf79 | 524 | resource = NULL; |
45ee3199 | 525 | else |
e21fcf79 SR |
526 | resource = idr_find(&client->resource_idr, handle); |
527 | if (resource && resource->release == release) | |
45ee3199 | 528 | idr_remove(&client->resource_idr, handle); |
3ba94986 | 529 | spin_unlock_irq(&client->lock); |
3964a449 | 530 | |
e21fcf79 | 531 | if (!(resource && resource->release == release)) |
3964a449 KH |
532 | return -EINVAL; |
533 | ||
e21fcf79 SR |
534 | if (return_resource) |
535 | *return_resource = resource; | |
3964a449 | 536 | else |
e21fcf79 | 537 | resource->release(client, resource); |
3964a449 | 538 | |
fb443036 SR |
539 | client_put(client); |
540 | ||
3964a449 KH |
541 | return 0; |
542 | } | |
543 | ||
53dca511 SR |
544 | static void release_transaction(struct client *client, |
545 | struct client_resource *resource) | |
3964a449 | 546 | { |
3964a449 KH |
547 | } |
548 | ||
53dca511 SR |
549 | static void complete_transaction(struct fw_card *card, int rcode, |
550 | void *payload, size_t length, void *data) | |
19a15b93 | 551 | { |
97c18b7f SR |
552 | struct outbound_transaction_event *e = data; |
553 | struct fw_cdev_event_response *rsp = &e->response; | |
554 | struct client *client = e->client; | |
28cf6a04 | 555 | unsigned long flags; |
19a15b93 | 556 | |
97c18b7f SR |
557 | if (length < rsp->length) |
558 | rsp->length = length; | |
19a15b93 | 559 | if (rcode == RCODE_COMPLETE) |
97c18b7f | 560 | memcpy(rsp->data, payload, rsp->length); |
19a15b93 | 561 | |
28cf6a04 | 562 | spin_lock_irqsave(&client->lock, flags); |
5a5e62da CL |
563 | idr_remove(&client->resource_idr, e->r.resource.handle); |
564 | if (client->in_shutdown) | |
565 | wake_up(&client->tx_flush_wait); | |
28cf6a04 KH |
566 | spin_unlock_irqrestore(&client->lock, flags); |
567 | ||
97c18b7f SR |
568 | rsp->type = FW_CDEV_EVENT_RESPONSE; |
569 | rsp->rcode = rcode; | |
8401d92b DM |
570 | |
571 | /* | |
97c18b7f | 572 | * In the case that sizeof(*rsp) doesn't align with the position of the |
8401d92b DM |
573 | * data, and the read is short, preserve an extra copy of the data |
574 | * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless | |
575 | * for short reads and some apps depended on it, this is both safe | |
576 | * and prudent for compatibility. | |
577 | */ | |
97c18b7f SR |
578 | if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data)) |
579 | queue_event(client, &e->event, rsp, sizeof(*rsp), | |
580 | rsp->data, rsp->length); | |
8401d92b | 581 | else |
97c18b7f | 582 | queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length, |
8401d92b | 583 | NULL, 0); |
fb443036 | 584 | |
5a5e62da CL |
585 | /* Drop the idr's reference */ |
586 | client_put(client); | |
19a15b93 KH |
587 | } |
588 | ||
acfe8333 JFSR |
589 | static int init_request(struct client *client, |
590 | struct fw_cdev_send_request *request, | |
591 | int destination_id, int speed) | |
19a15b93 | 592 | { |
97c18b7f | 593 | struct outbound_transaction_event *e; |
1f3125af | 594 | int ret; |
19a15b93 | 595 | |
18e9b10f SR |
596 | if (request->tcode != TCODE_STREAM_DATA && |
597 | (request->length > 4096 || request->length > 512 << speed)) | |
5d3fd692 | 598 | return -EIO; |
19a15b93 | 599 | |
a8e93f3d CL |
600 | if (request->tcode == TCODE_WRITE_QUADLET_REQUEST && |
601 | request->length < 4) | |
602 | return -EINVAL; | |
603 | ||
97c18b7f SR |
604 | e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL); |
605 | if (e == NULL) | |
19a15b93 KH |
606 | return -ENOMEM; |
607 | ||
97c18b7f SR |
608 | e->client = client; |
609 | e->response.length = request->length; | |
610 | e->response.closure = request->closure; | |
19a15b93 | 611 | |
4f259223 | 612 | if (request->data && |
97c18b7f | 613 | copy_from_user(e->response.data, |
4f259223 | 614 | u64_to_uptr(request->data), request->length)) { |
1f3125af | 615 | ret = -EFAULT; |
45ee3199 | 616 | goto failed; |
1f3125af SR |
617 | } |
618 | ||
97c18b7f SR |
619 | e->r.resource.release = release_transaction; |
620 | ret = add_client_resource(client, &e->r.resource, GFP_KERNEL); | |
45ee3199 JF |
621 | if (ret < 0) |
622 | goto failed; | |
28cf6a04 | 623 | |
acfe8333 | 624 | fw_send_request(client->device->card, &e->r.transaction, |
664d8010 SR |
625 | request->tcode, destination_id, request->generation, |
626 | speed, request->offset, e->response.data, | |
627 | request->length, complete_transaction, e); | |
628 | return 0; | |
19a15b93 | 629 | |
45ee3199 | 630 | failed: |
97c18b7f | 631 | kfree(e); |
1f3125af SR |
632 | |
633 | return ret; | |
19a15b93 KH |
634 | } |
635 | ||
6e95dea7 | 636 | static int ioctl_send_request(struct client *client, union ioctl_arg *arg) |
acfe8333 | 637 | { |
6e95dea7 | 638 | switch (arg->send_request.tcode) { |
acfe8333 JFSR |
639 | case TCODE_WRITE_QUADLET_REQUEST: |
640 | case TCODE_WRITE_BLOCK_REQUEST: | |
641 | case TCODE_READ_QUADLET_REQUEST: | |
642 | case TCODE_READ_BLOCK_REQUEST: | |
643 | case TCODE_LOCK_MASK_SWAP: | |
644 | case TCODE_LOCK_COMPARE_SWAP: | |
645 | case TCODE_LOCK_FETCH_ADD: | |
646 | case TCODE_LOCK_LITTLE_ADD: | |
647 | case TCODE_LOCK_BOUNDED_ADD: | |
648 | case TCODE_LOCK_WRAP_ADD: | |
649 | case TCODE_LOCK_VENDOR_DEPENDENT: | |
650 | break; | |
651 | default: | |
652 | return -EINVAL; | |
653 | } | |
654 | ||
6e95dea7 | 655 | return init_request(client, &arg->send_request, client->device->node_id, |
acfe8333 JFSR |
656 | client->device->max_speed); |
657 | } | |
658 | ||
281e2032 SR |
659 | static inline bool is_fcp_request(struct fw_request *request) |
660 | { | |
661 | return request == NULL; | |
662 | } | |
663 | ||
53dca511 SR |
664 | static void release_request(struct client *client, |
665 | struct client_resource *resource) | |
3964a449 | 666 | { |
97c18b7f SR |
667 | struct inbound_transaction_resource *r = container_of(resource, |
668 | struct inbound_transaction_resource, resource); | |
3964a449 | 669 | |
281e2032 SR |
670 | if (is_fcp_request(r->request)) |
671 | kfree(r->data); | |
672 | else | |
08bd34c9 | 673 | fw_send_response(r->card, r->request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
674 | |
675 | fw_card_put(r->card); | |
97c18b7f | 676 | kfree(r); |
3964a449 KH |
677 | } |
678 | ||
97c18b7f | 679 | static void handle_request(struct fw_card *card, struct fw_request *request, |
53dca511 | 680 | int tcode, int destination, int source, |
33e553fe | 681 | int generation, unsigned long long offset, |
53dca511 | 682 | void *payload, size_t length, void *callback_data) |
19a15b93 | 683 | { |
97c18b7f SR |
684 | struct address_handler_resource *handler = callback_data; |
685 | struct inbound_transaction_resource *r; | |
686 | struct inbound_transaction_event *e; | |
e205597d | 687 | size_t event_size0; |
281e2032 | 688 | void *fcp_frame = NULL; |
45ee3199 | 689 | int ret; |
19a15b93 | 690 | |
0244f573 SR |
691 | /* card may be different from handler->client->device->card */ |
692 | fw_card_get(card); | |
693 | ||
97c18b7f | 694 | r = kmalloc(sizeof(*r), GFP_ATOMIC); |
2d826cc5 | 695 | e = kmalloc(sizeof(*e), GFP_ATOMIC); |
bf54e146 | 696 | if (r == NULL || e == NULL) { |
26b4950d | 697 | fw_notice(card, "out of memory when allocating event\n"); |
45ee3199 | 698 | goto failed; |
bf54e146 | 699 | } |
08bd34c9 | 700 | r->card = card; |
97c18b7f SR |
701 | r->request = request; |
702 | r->data = payload; | |
703 | r->length = length; | |
19a15b93 | 704 | |
281e2032 SR |
705 | if (is_fcp_request(request)) { |
706 | /* | |
707 | * FIXME: Let core-transaction.c manage a | |
708 | * single reference-counted copy? | |
709 | */ | |
710 | fcp_frame = kmemdup(payload, length, GFP_ATOMIC); | |
711 | if (fcp_frame == NULL) | |
712 | goto failed; | |
713 | ||
714 | r->data = fcp_frame; | |
715 | } | |
716 | ||
97c18b7f SR |
717 | r->resource.release = release_request; |
718 | ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC); | |
45ee3199 JF |
719 | if (ret < 0) |
720 | goto failed; | |
19a15b93 | 721 | |
e205597d SR |
722 | if (handler->client->version < FW_CDEV_VERSION_EVENT_REQUEST2) { |
723 | struct fw_cdev_event_request *req = &e->req.request; | |
724 | ||
725 | if (tcode & 0x10) | |
726 | tcode = TCODE_LOCK_REQUEST; | |
727 | ||
728 | req->type = FW_CDEV_EVENT_REQUEST; | |
729 | req->tcode = tcode; | |
730 | req->offset = offset; | |
731 | req->length = length; | |
732 | req->handle = r->resource.handle; | |
733 | req->closure = handler->closure; | |
734 | event_size0 = sizeof(*req); | |
735 | } else { | |
736 | struct fw_cdev_event_request2 *req = &e->req.request2; | |
737 | ||
738 | req->type = FW_CDEV_EVENT_REQUEST2; | |
739 | req->tcode = tcode; | |
740 | req->offset = offset; | |
741 | req->source_node_id = source; | |
742 | req->destination_node_id = destination; | |
743 | req->card = card->index; | |
744 | req->generation = generation; | |
745 | req->length = length; | |
746 | req->handle = r->resource.handle; | |
747 | req->closure = handler->closure; | |
748 | event_size0 = sizeof(*req); | |
749 | } | |
19a15b93 | 750 | |
97c18b7f | 751 | queue_event(handler->client, &e->event, |
e205597d | 752 | &e->req, event_size0, r->data, length); |
45ee3199 JF |
753 | return; |
754 | ||
755 | failed: | |
97c18b7f | 756 | kfree(r); |
45ee3199 | 757 | kfree(e); |
281e2032 SR |
758 | kfree(fcp_frame); |
759 | ||
760 | if (!is_fcp_request(request)) | |
db5d247a | 761 | fw_send_response(card, request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
762 | |
763 | fw_card_put(card); | |
19a15b93 KH |
764 | } |
765 | ||
53dca511 SR |
766 | static void release_address_handler(struct client *client, |
767 | struct client_resource *resource) | |
3964a449 | 768 | { |
97c18b7f SR |
769 | struct address_handler_resource *r = |
770 | container_of(resource, struct address_handler_resource, resource); | |
3964a449 | 771 | |
97c18b7f SR |
772 | fw_core_remove_address_handler(&r->handler); |
773 | kfree(r); | |
3964a449 KH |
774 | } |
775 | ||
6e95dea7 | 776 | static int ioctl_allocate(struct client *client, union ioctl_arg *arg) |
19a15b93 | 777 | { |
6e95dea7 | 778 | struct fw_cdev_allocate *a = &arg->allocate; |
97c18b7f | 779 | struct address_handler_resource *r; |
19a15b93 | 780 | struct fw_address_region region; |
45ee3199 | 781 | int ret; |
19a15b93 | 782 | |
97c18b7f SR |
783 | r = kmalloc(sizeof(*r), GFP_KERNEL); |
784 | if (r == NULL) | |
19a15b93 KH |
785 | return -ENOMEM; |
786 | ||
6e95dea7 | 787 | region.start = a->offset; |
8e2b2b46 SR |
788 | if (client->version < FW_CDEV_VERSION_ALLOCATE_REGION_END) |
789 | region.end = a->offset + a->length; | |
790 | else | |
791 | region.end = a->region_end; | |
792 | ||
6e95dea7 | 793 | r->handler.length = a->length; |
97c18b7f | 794 | r->handler.address_callback = handle_request; |
6e95dea7 SR |
795 | r->handler.callback_data = r; |
796 | r->closure = a->closure; | |
797 | r->client = client; | |
19a15b93 | 798 | |
97c18b7f | 799 | ret = fw_core_add_address_handler(&r->handler, ®ion); |
3e0b5f0d | 800 | if (ret < 0) { |
97c18b7f | 801 | kfree(r); |
3e0b5f0d | 802 | return ret; |
19a15b93 | 803 | } |
8e2b2b46 | 804 | a->offset = r->handler.offset; |
19a15b93 | 805 | |
97c18b7f SR |
806 | r->resource.release = release_address_handler; |
807 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 808 | if (ret < 0) { |
97c18b7f | 809 | release_address_handler(client, &r->resource); |
45ee3199 JF |
810 | return ret; |
811 | } | |
6e95dea7 | 812 | a->handle = r->resource.handle; |
19a15b93 KH |
813 | |
814 | return 0; | |
815 | } | |
816 | ||
6e95dea7 | 817 | static int ioctl_deallocate(struct client *client, union ioctl_arg *arg) |
9472316b | 818 | { |
6e95dea7 | 819 | return release_client_resource(client, arg->deallocate.handle, |
45ee3199 | 820 | release_address_handler, NULL); |
9472316b KH |
821 | } |
822 | ||
6e95dea7 | 823 | static int ioctl_send_response(struct client *client, union ioctl_arg *arg) |
19a15b93 | 824 | { |
6e95dea7 | 825 | struct fw_cdev_send_response *a = &arg->send_response; |
3964a449 | 826 | struct client_resource *resource; |
97c18b7f | 827 | struct inbound_transaction_resource *r; |
7e44c0b5 | 828 | int ret = 0; |
19a15b93 | 829 | |
6e95dea7 | 830 | if (release_client_resource(client, a->handle, |
45ee3199 | 831 | release_request, &resource) < 0) |
19a15b93 | 832 | return -EINVAL; |
45ee3199 | 833 | |
97c18b7f SR |
834 | r = container_of(resource, struct inbound_transaction_resource, |
835 | resource); | |
281e2032 SR |
836 | if (is_fcp_request(r->request)) |
837 | goto out; | |
838 | ||
a10c0ce7 CL |
839 | if (a->length != fw_get_response_length(r->request)) { |
840 | ret = -EINVAL; | |
841 | kfree(r->request); | |
842 | goto out; | |
843 | } | |
844 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length)) { | |
281e2032 SR |
845 | ret = -EFAULT; |
846 | kfree(r->request); | |
847 | goto out; | |
7e44c0b5 | 848 | } |
08bd34c9 | 849 | fw_send_response(r->card, r->request, a->rcode); |
7e44c0b5 | 850 | out: |
0244f573 | 851 | fw_card_put(r->card); |
19a15b93 KH |
852 | kfree(r); |
853 | ||
7e44c0b5 | 854 | return ret; |
19a15b93 KH |
855 | } |
856 | ||
6e95dea7 | 857 | static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg) |
5371842b | 858 | { |
02d37bed | 859 | fw_schedule_bus_reset(client->device->card, true, |
6e95dea7 | 860 | arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET); |
02d37bed | 861 | return 0; |
5371842b KH |
862 | } |
863 | ||
3964a449 KH |
864 | static void release_descriptor(struct client *client, |
865 | struct client_resource *resource) | |
866 | { | |
97c18b7f SR |
867 | struct descriptor_resource *r = |
868 | container_of(resource, struct descriptor_resource, resource); | |
3964a449 | 869 | |
97c18b7f SR |
870 | fw_core_remove_descriptor(&r->descriptor); |
871 | kfree(r); | |
3964a449 KH |
872 | } |
873 | ||
6e95dea7 | 874 | static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 875 | { |
6e95dea7 | 876 | struct fw_cdev_add_descriptor *a = &arg->add_descriptor; |
97c18b7f | 877 | struct descriptor_resource *r; |
45ee3199 | 878 | int ret; |
66dea3e5 | 879 | |
de487da8 | 880 | /* Access policy: Allow this ioctl only on local nodes' device files. */ |
92368890 | 881 | if (!client->device->is_local) |
de487da8 SR |
882 | return -ENOSYS; |
883 | ||
6e95dea7 | 884 | if (a->length > 256) |
66dea3e5 KH |
885 | return -EINVAL; |
886 | ||
6e95dea7 | 887 | r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL); |
97c18b7f | 888 | if (r == NULL) |
66dea3e5 KH |
889 | return -ENOMEM; |
890 | ||
6e95dea7 | 891 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) { |
45ee3199 JF |
892 | ret = -EFAULT; |
893 | goto failed; | |
66dea3e5 KH |
894 | } |
895 | ||
6e95dea7 SR |
896 | r->descriptor.length = a->length; |
897 | r->descriptor.immediate = a->immediate; | |
898 | r->descriptor.key = a->key; | |
97c18b7f | 899 | r->descriptor.data = r->data; |
66dea3e5 | 900 | |
97c18b7f | 901 | ret = fw_core_add_descriptor(&r->descriptor); |
45ee3199 JF |
902 | if (ret < 0) |
903 | goto failed; | |
66dea3e5 | 904 | |
97c18b7f SR |
905 | r->resource.release = release_descriptor; |
906 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 907 | if (ret < 0) { |
97c18b7f | 908 | fw_core_remove_descriptor(&r->descriptor); |
45ee3199 JF |
909 | goto failed; |
910 | } | |
6e95dea7 | 911 | a->handle = r->resource.handle; |
66dea3e5 KH |
912 | |
913 | return 0; | |
45ee3199 | 914 | failed: |
97c18b7f | 915 | kfree(r); |
45ee3199 JF |
916 | |
917 | return ret; | |
66dea3e5 KH |
918 | } |
919 | ||
6e95dea7 | 920 | static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 921 | { |
6e95dea7 | 922 | return release_client_resource(client, arg->remove_descriptor.handle, |
45ee3199 | 923 | release_descriptor, NULL); |
66dea3e5 KH |
924 | } |
925 | ||
53dca511 SR |
926 | static void iso_callback(struct fw_iso_context *context, u32 cycle, |
927 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
928 | { |
929 | struct client *client = data; | |
97c18b7f | 930 | struct iso_interrupt_event *e; |
19a15b93 | 931 | |
56d04cb1 | 932 | e = kmalloc(sizeof(*e) + header_length, GFP_ATOMIC); |
bf54e146 | 933 | if (e == NULL) { |
26b4950d | 934 | fw_notice(context->card, "out of memory when allocating event\n"); |
19a15b93 | 935 | return; |
bf54e146 | 936 | } |
97c18b7f SR |
937 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
938 | e->interrupt.closure = client->iso_closure; | |
939 | e->interrupt.cycle = cycle; | |
940 | e->interrupt.header_length = header_length; | |
941 | memcpy(e->interrupt.header, header, header_length); | |
942 | queue_event(client, &e->event, &e->interrupt, | |
943 | sizeof(e->interrupt) + header_length, NULL, 0); | |
19a15b93 KH |
944 | } |
945 | ||
872e330e SR |
946 | static void iso_mc_callback(struct fw_iso_context *context, |
947 | dma_addr_t completed, void *data) | |
948 | { | |
949 | struct client *client = data; | |
950 | struct iso_interrupt_mc_event *e; | |
951 | ||
952 | e = kmalloc(sizeof(*e), GFP_ATOMIC); | |
953 | if (e == NULL) { | |
26b4950d | 954 | fw_notice(context->card, "out of memory when allocating event\n"); |
872e330e SR |
955 | return; |
956 | } | |
957 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL; | |
958 | e->interrupt.closure = client->iso_closure; | |
959 | e->interrupt.completed = fw_iso_buffer_lookup(&client->buffer, | |
960 | completed); | |
961 | queue_event(client, &e->event, &e->interrupt, | |
962 | sizeof(e->interrupt), NULL, 0); | |
963 | } | |
964 | ||
0b6c4857 SR |
965 | static enum dma_data_direction iso_dma_direction(struct fw_iso_context *context) |
966 | { | |
967 | if (context->type == FW_ISO_CONTEXT_TRANSMIT) | |
968 | return DMA_TO_DEVICE; | |
969 | else | |
970 | return DMA_FROM_DEVICE; | |
971 | } | |
972 | ||
6e95dea7 | 973 | static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) |
19a15b93 | 974 | { |
6e95dea7 | 975 | struct fw_cdev_create_iso_context *a = &arg->create_iso_context; |
24315c5e | 976 | struct fw_iso_context *context; |
872e330e | 977 | fw_iso_callback_t cb; |
0b6c4857 | 978 | int ret; |
19a15b93 | 979 | |
eb5b35a5 | 980 | BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT != FW_ISO_CONTEXT_TRANSMIT || |
872e330e SR |
981 | FW_CDEV_ISO_CONTEXT_RECEIVE != FW_ISO_CONTEXT_RECEIVE || |
982 | FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL != | |
983 | FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL); | |
21efb3cf | 984 | |
6e95dea7 | 985 | switch (a->type) { |
872e330e SR |
986 | case FW_ISO_CONTEXT_TRANSMIT: |
987 | if (a->speed > SCODE_3200 || a->channel > 63) | |
c70dc788 | 988 | return -EINVAL; |
872e330e SR |
989 | |
990 | cb = iso_callback; | |
c70dc788 KH |
991 | break; |
992 | ||
872e330e SR |
993 | case FW_ISO_CONTEXT_RECEIVE: |
994 | if (a->header_size < 4 || (a->header_size & 3) || | |
995 | a->channel > 63) | |
c70dc788 | 996 | return -EINVAL; |
872e330e SR |
997 | |
998 | cb = iso_callback; | |
999 | break; | |
1000 | ||
1001 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
1002 | cb = (fw_iso_callback_t)iso_mc_callback; | |
c70dc788 KH |
1003 | break; |
1004 | ||
1005 | default: | |
21efb3cf | 1006 | return -EINVAL; |
c70dc788 KH |
1007 | } |
1008 | ||
6e95dea7 | 1009 | context = fw_iso_context_create(client->device->card, a->type, |
872e330e | 1010 | a->channel, a->speed, a->header_size, cb, client); |
24315c5e KH |
1011 | if (IS_ERR(context)) |
1012 | return PTR_ERR(context); | |
1013 | ||
bdfe273e CL |
1014 | /* We only support one context at this time. */ |
1015 | spin_lock_irq(&client->lock); | |
1016 | if (client->iso_context != NULL) { | |
1017 | spin_unlock_irq(&client->lock); | |
1018 | fw_iso_context_destroy(context); | |
0b6c4857 | 1019 | |
bdfe273e CL |
1020 | return -EBUSY; |
1021 | } | |
0b6c4857 SR |
1022 | if (!client->buffer_is_mapped) { |
1023 | ret = fw_iso_buffer_map_dma(&client->buffer, | |
1024 | client->device->card, | |
1025 | iso_dma_direction(context)); | |
1026 | if (ret < 0) { | |
1027 | spin_unlock_irq(&client->lock); | |
1028 | fw_iso_context_destroy(context); | |
1029 | ||
1030 | return ret; | |
1031 | } | |
1032 | client->buffer_is_mapped = true; | |
1033 | } | |
6e95dea7 | 1034 | client->iso_closure = a->closure; |
24315c5e | 1035 | client->iso_context = context; |
bdfe273e | 1036 | spin_unlock_irq(&client->lock); |
19a15b93 | 1037 | |
6e95dea7 | 1038 | a->handle = 0; |
abaa5743 | 1039 | |
19a15b93 KH |
1040 | return 0; |
1041 | } | |
1042 | ||
872e330e SR |
1043 | static int ioctl_set_iso_channels(struct client *client, union ioctl_arg *arg) |
1044 | { | |
1045 | struct fw_cdev_set_iso_channels *a = &arg->set_iso_channels; | |
1046 | struct fw_iso_context *ctx = client->iso_context; | |
1047 | ||
1048 | if (ctx == NULL || a->handle != 0) | |
1049 | return -EINVAL; | |
1050 | ||
1051 | return fw_iso_context_set_channels(ctx, &a->channels); | |
1052 | } | |
1053 | ||
1ca31ae7 KH |
1054 | /* Macros for decoding the iso packet control header. */ |
1055 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) | |
1056 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) | |
1057 | #define GET_SKIP(v) (((v) >> 17) & 0x01) | |
7a100344 SR |
1058 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
1059 | #define GET_SY(v) (((v) >> 20) & 0x0f) | |
1ca31ae7 KH |
1060 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
1061 | ||
6e95dea7 | 1062 | static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1063 | { |
6e95dea7 | 1064 | struct fw_cdev_queue_iso *a = &arg->queue_iso; |
19a15b93 | 1065 | struct fw_cdev_iso_packet __user *p, *end, *next; |
9b32d5f3 | 1066 | struct fw_iso_context *ctx = client->iso_context; |
872e330e | 1067 | unsigned long payload, buffer_end, transmit_header_bytes = 0; |
1ca31ae7 | 1068 | u32 control; |
19a15b93 KH |
1069 | int count; |
1070 | struct { | |
1071 | struct fw_iso_packet packet; | |
1072 | u8 header[256]; | |
1073 | } u; | |
1074 | ||
6e95dea7 | 1075 | if (ctx == NULL || a->handle != 0) |
19a15b93 | 1076 | return -EINVAL; |
19a15b93 | 1077 | |
c781c06d KH |
1078 | /* |
1079 | * If the user passes a non-NULL data pointer, has mmap()'ed | |
19a15b93 KH |
1080 | * the iso buffer, and the pointer points inside the buffer, |
1081 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 1082 | * set them both to 0, which will still let packets with |
19a15b93 KH |
1083 | * payload_length == 0 through. In other words, if no packets |
1084 | * use the indirect payload, the iso buffer need not be mapped | |
6e95dea7 | 1085 | * and the a->data pointer is ignored. |
c781c06d | 1086 | */ |
6e95dea7 | 1087 | payload = (unsigned long)a->data - client->vm_start; |
ef370ee7 | 1088 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
6e95dea7 | 1089 | if (a->data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 1090 | payload >= buffer_end) { |
9aad8125 | 1091 | payload = 0; |
ef370ee7 | 1092 | buffer_end = 0; |
19a15b93 KH |
1093 | } |
1094 | ||
872e330e SR |
1095 | if (ctx->type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL && payload & 3) |
1096 | return -EINVAL; | |
1ccc9147 | 1097 | |
872e330e | 1098 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets); |
6e95dea7 | 1099 | if (!access_ok(VERIFY_READ, p, a->size)) |
19a15b93 KH |
1100 | return -EFAULT; |
1101 | ||
6e95dea7 | 1102 | end = (void __user *)p + a->size; |
19a15b93 KH |
1103 | count = 0; |
1104 | while (p < end) { | |
1ca31ae7 | 1105 | if (get_user(control, &p->control)) |
19a15b93 | 1106 | return -EFAULT; |
1ca31ae7 KH |
1107 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
1108 | u.packet.interrupt = GET_INTERRUPT(control); | |
1109 | u.packet.skip = GET_SKIP(control); | |
1110 | u.packet.tag = GET_TAG(control); | |
1111 | u.packet.sy = GET_SY(control); | |
1112 | u.packet.header_length = GET_HEADER_LENGTH(control); | |
295e3feb | 1113 | |
872e330e SR |
1114 | switch (ctx->type) { |
1115 | case FW_ISO_CONTEXT_TRANSMIT: | |
1116 | if (u.packet.header_length & 3) | |
385ab5bc | 1117 | return -EINVAL; |
ae2a9766 | 1118 | transmit_header_bytes = u.packet.header_length; |
872e330e SR |
1119 | break; |
1120 | ||
1121 | case FW_ISO_CONTEXT_RECEIVE: | |
69e61d0c SR |
1122 | if (u.packet.header_length == 0 || |
1123 | u.packet.header_length % ctx->header_size != 0) | |
385ab5bc | 1124 | return -EINVAL; |
872e330e SR |
1125 | break; |
1126 | ||
1127 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
1128 | if (u.packet.payload_length == 0 || | |
1129 | u.packet.payload_length & 3) | |
295e3feb | 1130 | return -EINVAL; |
872e330e | 1131 | break; |
295e3feb KH |
1132 | } |
1133 | ||
19a15b93 | 1134 | next = (struct fw_cdev_iso_packet __user *) |
ae2a9766 | 1135 | &p->header[transmit_header_bytes / 4]; |
19a15b93 KH |
1136 | if (next > end) |
1137 | return -EINVAL; | |
1138 | if (__copy_from_user | |
ae2a9766 | 1139 | (u.packet.header, p->header, transmit_header_bytes)) |
19a15b93 | 1140 | return -EFAULT; |
98b6cbe8 | 1141 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
1142 | u.packet.header_length + u.packet.payload_length > 0) |
1143 | return -EINVAL; | |
ef370ee7 | 1144 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
1145 | return -EINVAL; |
1146 | ||
9b32d5f3 KH |
1147 | if (fw_iso_context_queue(ctx, &u.packet, |
1148 | &client->buffer, payload)) | |
19a15b93 KH |
1149 | break; |
1150 | ||
1151 | p = next; | |
1152 | payload += u.packet.payload_length; | |
1153 | count++; | |
1154 | } | |
13882a82 | 1155 | fw_iso_context_queue_flush(ctx); |
19a15b93 | 1156 | |
6e95dea7 SR |
1157 | a->size -= uptr_to_u64(p) - a->packets; |
1158 | a->packets = uptr_to_u64(p); | |
1159 | a->data = client->vm_start + payload; | |
19a15b93 KH |
1160 | |
1161 | return count; | |
1162 | } | |
1163 | ||
6e95dea7 | 1164 | static int ioctl_start_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1165 | { |
6e95dea7 | 1166 | struct fw_cdev_start_iso *a = &arg->start_iso; |
19a15b93 | 1167 | |
eb5b35a5 SR |
1168 | BUILD_BUG_ON( |
1169 | FW_CDEV_ISO_CONTEXT_MATCH_TAG0 != FW_ISO_CONTEXT_MATCH_TAG0 || | |
1170 | FW_CDEV_ISO_CONTEXT_MATCH_TAG1 != FW_ISO_CONTEXT_MATCH_TAG1 || | |
1171 | FW_CDEV_ISO_CONTEXT_MATCH_TAG2 != FW_ISO_CONTEXT_MATCH_TAG2 || | |
1172 | FW_CDEV_ISO_CONTEXT_MATCH_TAG3 != FW_ISO_CONTEXT_MATCH_TAG3 || | |
1173 | FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS != FW_ISO_CONTEXT_MATCH_ALL_TAGS); | |
1174 | ||
6e95dea7 | 1175 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 | 1176 | return -EINVAL; |
fae60312 | 1177 | |
6e95dea7 SR |
1178 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE && |
1179 | (a->tags == 0 || a->tags > 15 || a->sync > 15)) | |
1180 | return -EINVAL; | |
eb0306ea | 1181 | |
6e95dea7 SR |
1182 | return fw_iso_context_start(client->iso_context, |
1183 | a->cycle, a->sync, a->tags); | |
19a15b93 KH |
1184 | } |
1185 | ||
6e95dea7 | 1186 | static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg) |
b8295668 | 1187 | { |
6e95dea7 | 1188 | struct fw_cdev_stop_iso *a = &arg->stop_iso; |
abaa5743 | 1189 | |
6e95dea7 | 1190 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 KH |
1191 | return -EINVAL; |
1192 | ||
b8295668 KH |
1193 | return fw_iso_context_stop(client->iso_context); |
1194 | } | |
1195 | ||
d1bbd209 CL |
1196 | static int ioctl_flush_iso(struct client *client, union ioctl_arg *arg) |
1197 | { | |
1198 | struct fw_cdev_flush_iso *a = &arg->flush_iso; | |
1199 | ||
1200 | if (client->iso_context == NULL || a->handle != 0) | |
1201 | return -EINVAL; | |
1202 | ||
1203 | return fw_iso_context_flush_completions(client->iso_context); | |
1204 | } | |
1205 | ||
6e95dea7 | 1206 | static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg) |
a64408b9 | 1207 | { |
6e95dea7 | 1208 | struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2; |
a64408b9 | 1209 | struct fw_card *card = client->device->card; |
abfe5a01 | 1210 | struct timespec ts = {0, 0}; |
4a9bde9b | 1211 | u32 cycle_time; |
abfe5a01 | 1212 | int ret = 0; |
a64408b9 | 1213 | |
4a9bde9b | 1214 | local_irq_disable(); |
a64408b9 | 1215 | |
0fcff4e3 | 1216 | cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME); |
abfe5a01 | 1217 | |
6e95dea7 | 1218 | switch (a->clk_id) { |
abfe5a01 SR |
1219 | case CLOCK_REALTIME: getnstimeofday(&ts); break; |
1220 | case CLOCK_MONOTONIC: do_posix_clock_monotonic_gettime(&ts); break; | |
1221 | case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts); break; | |
1222 | default: | |
1223 | ret = -EINVAL; | |
1224 | } | |
a64408b9 | 1225 | |
4a9bde9b | 1226 | local_irq_enable(); |
a64408b9 | 1227 | |
6e95dea7 SR |
1228 | a->tv_sec = ts.tv_sec; |
1229 | a->tv_nsec = ts.tv_nsec; | |
1230 | a->cycle_timer = cycle_time; | |
abfe5a01 SR |
1231 | |
1232 | return ret; | |
1233 | } | |
1234 | ||
6e95dea7 | 1235 | static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg) |
abfe5a01 | 1236 | { |
6e95dea7 | 1237 | struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer; |
abfe5a01 SR |
1238 | struct fw_cdev_get_cycle_timer2 ct2; |
1239 | ||
1240 | ct2.clk_id = CLOCK_REALTIME; | |
6e95dea7 | 1241 | ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2); |
abfe5a01 | 1242 | |
6e95dea7 SR |
1243 | a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC; |
1244 | a->cycle_timer = ct2.cycle_timer; | |
4a9bde9b | 1245 | |
a64408b9 SR |
1246 | return 0; |
1247 | } | |
1248 | ||
b1bda4cd JFSR |
1249 | static void iso_resource_work(struct work_struct *work) |
1250 | { | |
1251 | struct iso_resource_event *e; | |
1252 | struct iso_resource *r = | |
1253 | container_of(work, struct iso_resource, work.work); | |
1254 | struct client *client = r->client; | |
1255 | int generation, channel, bandwidth, todo; | |
1256 | bool skip, free, success; | |
1257 | ||
1258 | spin_lock_irq(&client->lock); | |
1259 | generation = client->device->generation; | |
1260 | todo = r->todo; | |
1261 | /* Allow 1000ms grace period for other reallocations. */ | |
1262 | if (todo == ISO_RES_ALLOC && | |
e71084af CL |
1263 | time_before64(get_jiffies_64(), |
1264 | client->device->card->reset_jiffies + HZ)) { | |
9fb551bf | 1265 | schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3)); |
b1bda4cd JFSR |
1266 | skip = true; |
1267 | } else { | |
1268 | /* We could be called twice within the same generation. */ | |
1269 | skip = todo == ISO_RES_REALLOC && | |
1270 | r->generation == generation; | |
1271 | } | |
1ec3c026 SR |
1272 | free = todo == ISO_RES_DEALLOC || |
1273 | todo == ISO_RES_ALLOC_ONCE || | |
1274 | todo == ISO_RES_DEALLOC_ONCE; | |
b1bda4cd JFSR |
1275 | r->generation = generation; |
1276 | spin_unlock_irq(&client->lock); | |
1277 | ||
1278 | if (skip) | |
1279 | goto out; | |
1280 | ||
1281 | bandwidth = r->bandwidth; | |
1282 | ||
1283 | fw_iso_resource_manage(client->device->card, generation, | |
1284 | r->channels, &channel, &bandwidth, | |
1ec3c026 SR |
1285 | todo == ISO_RES_ALLOC || |
1286 | todo == ISO_RES_REALLOC || | |
f30e6d3e | 1287 | todo == ISO_RES_ALLOC_ONCE); |
b1bda4cd JFSR |
1288 | /* |
1289 | * Is this generation outdated already? As long as this resource sticks | |
1290 | * in the idr, it will be scheduled again for a newer generation or at | |
1291 | * shutdown. | |
1292 | */ | |
1293 | if (channel == -EAGAIN && | |
1294 | (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC)) | |
1295 | goto out; | |
1296 | ||
1297 | success = channel >= 0 || bandwidth > 0; | |
1298 | ||
1299 | spin_lock_irq(&client->lock); | |
1300 | /* | |
1301 | * Transit from allocation to reallocation, except if the client | |
1302 | * requested deallocation in the meantime. | |
1303 | */ | |
1304 | if (r->todo == ISO_RES_ALLOC) | |
1305 | r->todo = ISO_RES_REALLOC; | |
1306 | /* | |
1307 | * Allocation or reallocation failure? Pull this resource out of the | |
1308 | * idr and prepare for deletion, unless the client is shutting down. | |
1309 | */ | |
1310 | if (r->todo == ISO_RES_REALLOC && !success && | |
1311 | !client->in_shutdown && | |
1312 | idr_find(&client->resource_idr, r->resource.handle)) { | |
1313 | idr_remove(&client->resource_idr, r->resource.handle); | |
1314 | client_put(client); | |
1315 | free = true; | |
1316 | } | |
1317 | spin_unlock_irq(&client->lock); | |
1318 | ||
1319 | if (todo == ISO_RES_ALLOC && channel >= 0) | |
5d9cb7d2 | 1320 | r->channels = 1ULL << channel; |
b1bda4cd JFSR |
1321 | |
1322 | if (todo == ISO_RES_REALLOC && success) | |
1323 | goto out; | |
1324 | ||
1ec3c026 | 1325 | if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) { |
b1bda4cd JFSR |
1326 | e = r->e_alloc; |
1327 | r->e_alloc = NULL; | |
1328 | } else { | |
1329 | e = r->e_dealloc; | |
1330 | r->e_dealloc = NULL; | |
1331 | } | |
e21fcf79 SR |
1332 | e->iso_resource.handle = r->resource.handle; |
1333 | e->iso_resource.channel = channel; | |
1334 | e->iso_resource.bandwidth = bandwidth; | |
b1bda4cd JFSR |
1335 | |
1336 | queue_event(client, &e->event, | |
e21fcf79 | 1337 | &e->iso_resource, sizeof(e->iso_resource), NULL, 0); |
b1bda4cd JFSR |
1338 | |
1339 | if (free) { | |
1340 | cancel_delayed_work(&r->work); | |
1341 | kfree(r->e_alloc); | |
1342 | kfree(r->e_dealloc); | |
1343 | kfree(r); | |
1344 | } | |
1345 | out: | |
1346 | client_put(client); | |
1347 | } | |
1348 | ||
b1bda4cd JFSR |
1349 | static void release_iso_resource(struct client *client, |
1350 | struct client_resource *resource) | |
1351 | { | |
1352 | struct iso_resource *r = | |
1353 | container_of(resource, struct iso_resource, resource); | |
1354 | ||
1355 | spin_lock_irq(&client->lock); | |
1356 | r->todo = ISO_RES_DEALLOC; | |
9fb551bf | 1357 | schedule_iso_resource(r, 0); |
b1bda4cd JFSR |
1358 | spin_unlock_irq(&client->lock); |
1359 | } | |
1360 | ||
1ec3c026 SR |
1361 | static int init_iso_resource(struct client *client, |
1362 | struct fw_cdev_allocate_iso_resource *request, int todo) | |
b1bda4cd | 1363 | { |
b1bda4cd JFSR |
1364 | struct iso_resource_event *e1, *e2; |
1365 | struct iso_resource *r; | |
1366 | int ret; | |
1367 | ||
1368 | if ((request->channels == 0 && request->bandwidth == 0) || | |
bdabfa54 | 1369 | request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL) |
b1bda4cd JFSR |
1370 | return -EINVAL; |
1371 | ||
1372 | r = kmalloc(sizeof(*r), GFP_KERNEL); | |
1373 | e1 = kmalloc(sizeof(*e1), GFP_KERNEL); | |
1374 | e2 = kmalloc(sizeof(*e2), GFP_KERNEL); | |
1375 | if (r == NULL || e1 == NULL || e2 == NULL) { | |
1376 | ret = -ENOMEM; | |
1377 | goto fail; | |
1378 | } | |
1379 | ||
1380 | INIT_DELAYED_WORK(&r->work, iso_resource_work); | |
1381 | r->client = client; | |
1ec3c026 | 1382 | r->todo = todo; |
b1bda4cd JFSR |
1383 | r->generation = -1; |
1384 | r->channels = request->channels; | |
1385 | r->bandwidth = request->bandwidth; | |
1386 | r->e_alloc = e1; | |
1387 | r->e_dealloc = e2; | |
1388 | ||
e21fcf79 SR |
1389 | e1->iso_resource.closure = request->closure; |
1390 | e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED; | |
1391 | e2->iso_resource.closure = request->closure; | |
1392 | e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED; | |
b1bda4cd | 1393 | |
1ec3c026 SR |
1394 | if (todo == ISO_RES_ALLOC) { |
1395 | r->resource.release = release_iso_resource; | |
1396 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
81610b8f SR |
1397 | if (ret < 0) |
1398 | goto fail; | |
1ec3c026 SR |
1399 | } else { |
1400 | r->resource.release = NULL; | |
1401 | r->resource.handle = -1; | |
9fb551bf | 1402 | schedule_iso_resource(r, 0); |
1ec3c026 | 1403 | } |
b1bda4cd JFSR |
1404 | request->handle = r->resource.handle; |
1405 | ||
1406 | return 0; | |
1407 | fail: | |
1408 | kfree(r); | |
1409 | kfree(e1); | |
1410 | kfree(e2); | |
1411 | ||
1412 | return ret; | |
1413 | } | |
1414 | ||
6e95dea7 SR |
1415 | static int ioctl_allocate_iso_resource(struct client *client, |
1416 | union ioctl_arg *arg) | |
1ec3c026 | 1417 | { |
6e95dea7 SR |
1418 | return init_iso_resource(client, |
1419 | &arg->allocate_iso_resource, ISO_RES_ALLOC); | |
1ec3c026 SR |
1420 | } |
1421 | ||
6e95dea7 SR |
1422 | static int ioctl_deallocate_iso_resource(struct client *client, |
1423 | union ioctl_arg *arg) | |
b1bda4cd | 1424 | { |
6e95dea7 SR |
1425 | return release_client_resource(client, |
1426 | arg->deallocate.handle, release_iso_resource, NULL); | |
b1bda4cd JFSR |
1427 | } |
1428 | ||
6e95dea7 SR |
1429 | static int ioctl_allocate_iso_resource_once(struct client *client, |
1430 | union ioctl_arg *arg) | |
1ec3c026 | 1431 | { |
6e95dea7 SR |
1432 | return init_iso_resource(client, |
1433 | &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE); | |
1ec3c026 SR |
1434 | } |
1435 | ||
6e95dea7 SR |
1436 | static int ioctl_deallocate_iso_resource_once(struct client *client, |
1437 | union ioctl_arg *arg) | |
1ec3c026 | 1438 | { |
6e95dea7 SR |
1439 | return init_iso_resource(client, |
1440 | &arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE); | |
1ec3c026 SR |
1441 | } |
1442 | ||
c8a25900 SR |
1443 | /* |
1444 | * Returns a speed code: Maximum speed to or from this device, | |
1445 | * limited by the device's link speed, the local node's link speed, | |
1446 | * and all PHY port speeds between the two links. | |
1447 | */ | |
6e95dea7 | 1448 | static int ioctl_get_speed(struct client *client, union ioctl_arg *arg) |
33580a3e | 1449 | { |
c8a25900 | 1450 | return client->device->max_speed; |
33580a3e SR |
1451 | } |
1452 | ||
6e95dea7 SR |
1453 | static int ioctl_send_broadcast_request(struct client *client, |
1454 | union ioctl_arg *arg) | |
acfe8333 | 1455 | { |
6e95dea7 | 1456 | struct fw_cdev_send_request *a = &arg->send_request; |
acfe8333 | 1457 | |
6e95dea7 | 1458 | switch (a->tcode) { |
acfe8333 JFSR |
1459 | case TCODE_WRITE_QUADLET_REQUEST: |
1460 | case TCODE_WRITE_BLOCK_REQUEST: | |
1461 | break; | |
1462 | default: | |
1463 | return -EINVAL; | |
1464 | } | |
1465 | ||
1566f3dc | 1466 | /* Security policy: Only allow accesses to Units Space. */ |
6e95dea7 | 1467 | if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END) |
1566f3dc SR |
1468 | return -EACCES; |
1469 | ||
6e95dea7 | 1470 | return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100); |
acfe8333 JFSR |
1471 | } |
1472 | ||
6e95dea7 | 1473 | static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg) |
f8c2287c | 1474 | { |
6e95dea7 | 1475 | struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet; |
18e9b10f SR |
1476 | struct fw_cdev_send_request request; |
1477 | int dest; | |
f8c2287c | 1478 | |
6e95dea7 SR |
1479 | if (a->speed > client->device->card->link_speed || |
1480 | a->length > 1024 << a->speed) | |
18e9b10f | 1481 | return -EIO; |
f8c2287c | 1482 | |
6e95dea7 | 1483 | if (a->tag > 3 || a->channel > 63 || a->sy > 15) |
18e9b10f SR |
1484 | return -EINVAL; |
1485 | ||
6e95dea7 | 1486 | dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy); |
18e9b10f | 1487 | request.tcode = TCODE_STREAM_DATA; |
6e95dea7 SR |
1488 | request.length = a->length; |
1489 | request.closure = a->closure; | |
1490 | request.data = a->data; | |
1491 | request.generation = a->generation; | |
18e9b10f | 1492 | |
6e95dea7 | 1493 | return init_request(client, &request, dest, a->speed); |
f8c2287c JF |
1494 | } |
1495 | ||
850bb6f2 SR |
1496 | static void outbound_phy_packet_callback(struct fw_packet *packet, |
1497 | struct fw_card *card, int status) | |
1498 | { | |
1499 | struct outbound_phy_packet_event *e = | |
1500 | container_of(packet, struct outbound_phy_packet_event, p); | |
1501 | ||
1502 | switch (status) { | |
1503 | /* expected: */ | |
1504 | case ACK_COMPLETE: e->phy_packet.rcode = RCODE_COMPLETE; break; | |
1505 | /* should never happen with PHY packets: */ | |
1506 | case ACK_PENDING: e->phy_packet.rcode = RCODE_COMPLETE; break; | |
1507 | case ACK_BUSY_X: | |
1508 | case ACK_BUSY_A: | |
1509 | case ACK_BUSY_B: e->phy_packet.rcode = RCODE_BUSY; break; | |
1510 | case ACK_DATA_ERROR: e->phy_packet.rcode = RCODE_DATA_ERROR; break; | |
1511 | case ACK_TYPE_ERROR: e->phy_packet.rcode = RCODE_TYPE_ERROR; break; | |
1512 | /* stale generation; cancelled; on certain controllers: no ack */ | |
1513 | default: e->phy_packet.rcode = status; break; | |
1514 | } | |
cc550216 | 1515 | e->phy_packet.data[0] = packet->timestamp; |
850bb6f2 | 1516 | |
cc550216 SR |
1517 | queue_event(e->client, &e->event, &e->phy_packet, |
1518 | sizeof(e->phy_packet) + e->phy_packet.length, NULL, 0); | |
850bb6f2 SR |
1519 | client_put(e->client); |
1520 | } | |
1521 | ||
1522 | static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg) | |
1523 | { | |
1524 | struct fw_cdev_send_phy_packet *a = &arg->send_phy_packet; | |
1525 | struct fw_card *card = client->device->card; | |
1526 | struct outbound_phy_packet_event *e; | |
1527 | ||
1528 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1529 | if (!client->device->is_local) | |
1530 | return -ENOSYS; | |
1531 | ||
cc550216 | 1532 | e = kzalloc(sizeof(*e) + 4, GFP_KERNEL); |
850bb6f2 SR |
1533 | if (e == NULL) |
1534 | return -ENOMEM; | |
1535 | ||
1536 | client_get(client); | |
1537 | e->client = client; | |
1538 | e->p.speed = SCODE_100; | |
1539 | e->p.generation = a->generation; | |
5b06db16 CL |
1540 | e->p.header[0] = TCODE_LINK_INTERNAL << 4; |
1541 | e->p.header[1] = a->data[0]; | |
1542 | e->p.header[2] = a->data[1]; | |
1543 | e->p.header_length = 12; | |
850bb6f2 SR |
1544 | e->p.callback = outbound_phy_packet_callback; |
1545 | e->phy_packet.closure = a->closure; | |
1546 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_SENT; | |
cc550216 SR |
1547 | if (is_ping_packet(a->data)) |
1548 | e->phy_packet.length = 4; | |
850bb6f2 SR |
1549 | |
1550 | card->driver->send_request(card, &e->p); | |
1551 | ||
1552 | return 0; | |
1553 | } | |
1554 | ||
bf54e146 SR |
1555 | static int ioctl_receive_phy_packets(struct client *client, union ioctl_arg *arg) |
1556 | { | |
1557 | struct fw_cdev_receive_phy_packets *a = &arg->receive_phy_packets; | |
1558 | struct fw_card *card = client->device->card; | |
1559 | ||
1560 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1561 | if (!client->device->is_local) | |
1562 | return -ENOSYS; | |
1563 | ||
1564 | spin_lock_irq(&card->lock); | |
1565 | ||
1566 | list_move_tail(&client->phy_receiver_link, &card->phy_receiver_list); | |
1567 | client->phy_receiver_closure = a->closure; | |
1568 | ||
1569 | spin_unlock_irq(&card->lock); | |
1570 | ||
1571 | return 0; | |
1572 | } | |
1573 | ||
1574 | void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p) | |
1575 | { | |
1576 | struct client *client; | |
1577 | struct inbound_phy_packet_event *e; | |
1578 | unsigned long flags; | |
1579 | ||
1580 | spin_lock_irqsave(&card->lock, flags); | |
1581 | ||
1582 | list_for_each_entry(client, &card->phy_receiver_list, phy_receiver_link) { | |
1583 | e = kmalloc(sizeof(*e) + 8, GFP_ATOMIC); | |
1584 | if (e == NULL) { | |
26b4950d | 1585 | fw_notice(card, "out of memory when allocating event\n"); |
bf54e146 SR |
1586 | break; |
1587 | } | |
1588 | e->phy_packet.closure = client->phy_receiver_closure; | |
1589 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_RECEIVED; | |
1590 | e->phy_packet.rcode = RCODE_COMPLETE; | |
1591 | e->phy_packet.length = 8; | |
1592 | e->phy_packet.data[0] = p->header[1]; | |
1593 | e->phy_packet.data[1] = p->header[2]; | |
1594 | queue_event(client, &e->event, | |
1595 | &e->phy_packet, sizeof(e->phy_packet) + 8, NULL, 0); | |
1596 | } | |
1597 | ||
1598 | spin_unlock_irqrestore(&card->lock, flags); | |
1599 | } | |
1600 | ||
6e95dea7 | 1601 | static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = { |
b9dc61cf SR |
1602 | [0x00] = ioctl_get_info, |
1603 | [0x01] = ioctl_send_request, | |
1604 | [0x02] = ioctl_allocate, | |
1605 | [0x03] = ioctl_deallocate, | |
1606 | [0x04] = ioctl_send_response, | |
1607 | [0x05] = ioctl_initiate_bus_reset, | |
1608 | [0x06] = ioctl_add_descriptor, | |
1609 | [0x07] = ioctl_remove_descriptor, | |
1610 | [0x08] = ioctl_create_iso_context, | |
1611 | [0x09] = ioctl_queue_iso, | |
1612 | [0x0a] = ioctl_start_iso, | |
1613 | [0x0b] = ioctl_stop_iso, | |
1614 | [0x0c] = ioctl_get_cycle_timer, | |
1615 | [0x0d] = ioctl_allocate_iso_resource, | |
1616 | [0x0e] = ioctl_deallocate_iso_resource, | |
1617 | [0x0f] = ioctl_allocate_iso_resource_once, | |
1618 | [0x10] = ioctl_deallocate_iso_resource_once, | |
1619 | [0x11] = ioctl_get_speed, | |
1620 | [0x12] = ioctl_send_broadcast_request, | |
1621 | [0x13] = ioctl_send_stream_packet, | |
1622 | [0x14] = ioctl_get_cycle_timer2, | |
850bb6f2 | 1623 | [0x15] = ioctl_send_phy_packet, |
bf54e146 | 1624 | [0x16] = ioctl_receive_phy_packets, |
872e330e | 1625 | [0x17] = ioctl_set_iso_channels, |
d1bbd209 | 1626 | [0x18] = ioctl_flush_iso, |
4f259223 KH |
1627 | }; |
1628 | ||
53dca511 SR |
1629 | static int dispatch_ioctl(struct client *client, |
1630 | unsigned int cmd, void __user *arg) | |
19a15b93 | 1631 | { |
6e95dea7 | 1632 | union ioctl_arg buffer; |
2dbd7d7e | 1633 | int ret; |
4f259223 | 1634 | |
64582298 SR |
1635 | if (fw_device_is_shutdown(client->device)) |
1636 | return -ENODEV; | |
1637 | ||
4f259223 | 1638 | if (_IOC_TYPE(cmd) != '#' || |
9cac00b8 SR |
1639 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) || |
1640 | _IOC_SIZE(cmd) > sizeof(buffer)) | |
d873d794 | 1641 | return -ENOTTY; |
4f259223 | 1642 | |
9cac00b8 SR |
1643 | if (_IOC_DIR(cmd) == _IOC_READ) |
1644 | memset(&buffer, 0, _IOC_SIZE(cmd)); | |
1645 | ||
1646 | if (_IOC_DIR(cmd) & _IOC_WRITE) | |
1647 | if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd))) | |
4f259223 | 1648 | return -EFAULT; |
4f259223 | 1649 | |
6e95dea7 | 1650 | ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer); |
2dbd7d7e SR |
1651 | if (ret < 0) |
1652 | return ret; | |
4f259223 | 1653 | |
9cac00b8 SR |
1654 | if (_IOC_DIR(cmd) & _IOC_READ) |
1655 | if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd))) | |
4f259223 | 1656 | return -EFAULT; |
4f259223 | 1657 | |
2dbd7d7e | 1658 | return ret; |
19a15b93 KH |
1659 | } |
1660 | ||
53dca511 SR |
1661 | static long fw_device_op_ioctl(struct file *file, |
1662 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1663 | { |
64582298 | 1664 | return dispatch_ioctl(file->private_data, cmd, (void __user *)arg); |
19a15b93 KH |
1665 | } |
1666 | ||
1667 | #ifdef CONFIG_COMPAT | |
53dca511 SR |
1668 | static long fw_device_op_compat_ioctl(struct file *file, |
1669 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1670 | { |
64582298 | 1671 | return dispatch_ioctl(file->private_data, cmd, compat_ptr(arg)); |
19a15b93 KH |
1672 | } |
1673 | #endif | |
1674 | ||
1675 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
1676 | { | |
1677 | struct client *client = file->private_data; | |
9aad8125 | 1678 | unsigned long size; |
2dbd7d7e | 1679 | int page_count, ret; |
9aad8125 | 1680 | |
551f4cb9 JF |
1681 | if (fw_device_is_shutdown(client->device)) |
1682 | return -ENODEV; | |
1683 | ||
9aad8125 KH |
1684 | /* FIXME: We could support multiple buffers, but we don't. */ |
1685 | if (client->buffer.pages != NULL) | |
1686 | return -EBUSY; | |
1687 | ||
1688 | if (!(vma->vm_flags & VM_SHARED)) | |
1689 | return -EINVAL; | |
19a15b93 | 1690 | |
9aad8125 | 1691 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
1692 | return -EINVAL; |
1693 | ||
1694 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
1695 | size = vma->vm_end - vma->vm_start; |
1696 | page_count = size >> PAGE_SHIFT; | |
1697 | if (size & ~PAGE_MASK) | |
1698 | return -EINVAL; | |
1699 | ||
0b6c4857 | 1700 | ret = fw_iso_buffer_alloc(&client->buffer, page_count); |
2dbd7d7e SR |
1701 | if (ret < 0) |
1702 | return ret; | |
19a15b93 | 1703 | |
0b6c4857 SR |
1704 | spin_lock_irq(&client->lock); |
1705 | if (client->iso_context) { | |
1706 | ret = fw_iso_buffer_map_dma(&client->buffer, | |
1707 | client->device->card, | |
1708 | iso_dma_direction(client->iso_context)); | |
1709 | client->buffer_is_mapped = (ret == 0); | |
1710 | } | |
1711 | spin_unlock_irq(&client->lock); | |
2dbd7d7e | 1712 | if (ret < 0) |
0b6c4857 | 1713 | goto fail; |
9aad8125 | 1714 | |
0b6c4857 SR |
1715 | ret = fw_iso_buffer_map_vma(&client->buffer, vma); |
1716 | if (ret < 0) | |
1717 | goto fail; | |
1718 | ||
1719 | return 0; | |
1720 | fail: | |
1721 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
2dbd7d7e | 1722 | return ret; |
19a15b93 KH |
1723 | } |
1724 | ||
5a5e62da CL |
1725 | static int is_outbound_transaction_resource(int id, void *p, void *data) |
1726 | { | |
1727 | struct client_resource *resource = p; | |
1728 | ||
1729 | return resource->release == release_transaction; | |
1730 | } | |
1731 | ||
1732 | static int has_outbound_transactions(struct client *client) | |
1733 | { | |
1734 | int ret; | |
1735 | ||
1736 | spin_lock_irq(&client->lock); | |
1737 | ret = idr_for_each(&client->resource_idr, | |
1738 | is_outbound_transaction_resource, NULL); | |
1739 | spin_unlock_irq(&client->lock); | |
1740 | ||
1741 | return ret; | |
1742 | } | |
1743 | ||
45ee3199 JF |
1744 | static int shutdown_resource(int id, void *p, void *data) |
1745 | { | |
e21fcf79 | 1746 | struct client_resource *resource = p; |
45ee3199 JF |
1747 | struct client *client = data; |
1748 | ||
e21fcf79 | 1749 | resource->release(client, resource); |
fb443036 | 1750 | client_put(client); |
45ee3199 JF |
1751 | |
1752 | return 0; | |
1753 | } | |
1754 | ||
19a15b93 KH |
1755 | static int fw_device_op_release(struct inode *inode, struct file *file) |
1756 | { | |
1757 | struct client *client = file->private_data; | |
e21fcf79 | 1758 | struct event *event, *next_event; |
19a15b93 | 1759 | |
bf54e146 SR |
1760 | spin_lock_irq(&client->device->card->lock); |
1761 | list_del(&client->phy_receiver_link); | |
1762 | spin_unlock_irq(&client->device->card->lock); | |
1763 | ||
97811e34 SR |
1764 | mutex_lock(&client->device->client_list_mutex); |
1765 | list_del(&client->link); | |
1766 | mutex_unlock(&client->device->client_list_mutex); | |
1767 | ||
19a15b93 KH |
1768 | if (client->iso_context) |
1769 | fw_iso_context_destroy(client->iso_context); | |
1770 | ||
36a755cf SR |
1771 | if (client->buffer.pages) |
1772 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
1773 | ||
45ee3199 | 1774 | /* Freeze client->resource_idr and client->event_list */ |
3ba94986 | 1775 | spin_lock_irq(&client->lock); |
45ee3199 | 1776 | client->in_shutdown = true; |
3ba94986 | 1777 | spin_unlock_irq(&client->lock); |
66dea3e5 | 1778 | |
5a5e62da CL |
1779 | wait_event(client->tx_flush_wait, !has_outbound_transactions(client)); |
1780 | ||
45ee3199 | 1781 | idr_for_each(&client->resource_idr, shutdown_resource, client); |
45ee3199 | 1782 | idr_destroy(&client->resource_idr); |
28cf6a04 | 1783 | |
e21fcf79 SR |
1784 | list_for_each_entry_safe(event, next_event, &client->event_list, link) |
1785 | kfree(event); | |
19a15b93 | 1786 | |
fb443036 | 1787 | client_put(client); |
19a15b93 KH |
1788 | |
1789 | return 0; | |
1790 | } | |
1791 | ||
1792 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
1793 | { | |
1794 | struct client *client = file->private_data; | |
2603bf21 | 1795 | unsigned int mask = 0; |
19a15b93 KH |
1796 | |
1797 | poll_wait(file, &client->wait, pt); | |
1798 | ||
2603bf21 KH |
1799 | if (fw_device_is_shutdown(client->device)) |
1800 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 1801 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
1802 | mask |= POLLIN | POLLRDNORM; |
1803 | ||
1804 | return mask; | |
19a15b93 KH |
1805 | } |
1806 | ||
21ebcd12 | 1807 | const struct file_operations fw_device_ops = { |
19a15b93 | 1808 | .owner = THIS_MODULE, |
3ac26b2e | 1809 | .llseek = no_llseek, |
19a15b93 KH |
1810 | .open = fw_device_op_open, |
1811 | .read = fw_device_op_read, | |
1812 | .unlocked_ioctl = fw_device_op_ioctl, | |
19a15b93 | 1813 | .mmap = fw_device_op_mmap, |
3ac26b2e SR |
1814 | .release = fw_device_op_release, |
1815 | .poll = fw_device_op_poll, | |
19a15b93 | 1816 | #ifdef CONFIG_COMPAT |
5af4e5ea | 1817 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
1818 | #endif |
1819 | }; |