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 | |
0699a73a | 57 | #define FW_CDEV_VERSION_AUTO_FLUSH_ISO_OVERFLOW 5 |
604f4516 | 58 | |
19a15b93 | 59 | struct client { |
344bbc4d | 60 | u32 version; |
19a15b93 | 61 | struct fw_device *device; |
45ee3199 | 62 | |
19a15b93 | 63 | spinlock_t lock; |
45ee3199 JF |
64 | bool in_shutdown; |
65 | struct idr resource_idr; | |
19a15b93 | 66 | struct list_head event_list; |
19a15b93 | 67 | wait_queue_head_t wait; |
5a5e62da | 68 | wait_queue_head_t tx_flush_wait; |
da8ecffa | 69 | u64 bus_reset_closure; |
9aad8125 | 70 | |
19a15b93 | 71 | struct fw_iso_context *iso_context; |
abaa5743 | 72 | u64 iso_closure; |
9aad8125 KH |
73 | struct fw_iso_buffer buffer; |
74 | unsigned long vm_start; | |
0b6c4857 | 75 | bool buffer_is_mapped; |
97bd9efa | 76 | |
bf54e146 SR |
77 | struct list_head phy_receiver_link; |
78 | u64 phy_receiver_closure; | |
79 | ||
97bd9efa | 80 | struct list_head link; |
fb443036 | 81 | struct kref kref; |
19a15b93 KH |
82 | }; |
83 | ||
fb443036 SR |
84 | static inline void client_get(struct client *client) |
85 | { | |
86 | kref_get(&client->kref); | |
87 | } | |
88 | ||
89 | static void client_release(struct kref *kref) | |
90 | { | |
91 | struct client *client = container_of(kref, struct client, kref); | |
92 | ||
93 | fw_device_put(client->device); | |
94 | kfree(client); | |
95 | } | |
96 | ||
97 | static void client_put(struct client *client) | |
98 | { | |
99 | kref_put(&client->kref, client_release); | |
100 | } | |
101 | ||
97c18b7f SR |
102 | struct client_resource; |
103 | typedef void (*client_resource_release_fn_t)(struct client *, | |
104 | struct client_resource *); | |
105 | struct client_resource { | |
106 | client_resource_release_fn_t release; | |
107 | int handle; | |
108 | }; | |
109 | ||
110 | struct address_handler_resource { | |
111 | struct client_resource resource; | |
112 | struct fw_address_handler handler; | |
113 | __u64 closure; | |
114 | struct client *client; | |
115 | }; | |
116 | ||
117 | struct outbound_transaction_resource { | |
118 | struct client_resource resource; | |
119 | struct fw_transaction transaction; | |
120 | }; | |
121 | ||
122 | struct inbound_transaction_resource { | |
123 | struct client_resource resource; | |
08bd34c9 | 124 | struct fw_card *card; |
97c18b7f SR |
125 | struct fw_request *request; |
126 | void *data; | |
127 | size_t length; | |
128 | }; | |
129 | ||
130 | struct descriptor_resource { | |
131 | struct client_resource resource; | |
132 | struct fw_descriptor descriptor; | |
133 | u32 data[0]; | |
134 | }; | |
135 | ||
b1bda4cd JFSR |
136 | struct iso_resource { |
137 | struct client_resource resource; | |
138 | struct client *client; | |
139 | /* Schedule work and access todo only with client->lock held. */ | |
140 | struct delayed_work work; | |
1ec3c026 SR |
141 | enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC, |
142 | ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo; | |
b1bda4cd JFSR |
143 | int generation; |
144 | u64 channels; | |
145 | s32 bandwidth; | |
146 | struct iso_resource_event *e_alloc, *e_dealloc; | |
147 | }; | |
148 | ||
b1bda4cd JFSR |
149 | static void release_iso_resource(struct client *, struct client_resource *); |
150 | ||
9fb551bf SR |
151 | static void schedule_iso_resource(struct iso_resource *r, unsigned long delay) |
152 | { | |
153 | client_get(r->client); | |
105e53f8 | 154 | if (!queue_delayed_work(fw_workqueue, &r->work, delay)) |
9fb551bf SR |
155 | client_put(r->client); |
156 | } | |
157 | ||
158 | static void schedule_if_iso_resource(struct client_resource *resource) | |
159 | { | |
160 | if (resource->release == release_iso_resource) | |
161 | schedule_iso_resource(container_of(resource, | |
162 | struct iso_resource, resource), 0); | |
163 | } | |
164 | ||
97c18b7f SR |
165 | /* |
166 | * dequeue_event() just kfree()'s the event, so the event has to be | |
167 | * the first field in a struct XYZ_event. | |
168 | */ | |
169 | struct event { | |
170 | struct { void *data; size_t size; } v[2]; | |
171 | struct list_head link; | |
172 | }; | |
173 | ||
174 | struct bus_reset_event { | |
175 | struct event event; | |
176 | struct fw_cdev_event_bus_reset reset; | |
177 | }; | |
178 | ||
179 | struct outbound_transaction_event { | |
180 | struct event event; | |
181 | struct client *client; | |
182 | struct outbound_transaction_resource r; | |
183 | struct fw_cdev_event_response response; | |
184 | }; | |
185 | ||
186 | struct inbound_transaction_event { | |
187 | struct event event; | |
e205597d SR |
188 | union { |
189 | struct fw_cdev_event_request request; | |
190 | struct fw_cdev_event_request2 request2; | |
191 | } req; | |
97c18b7f SR |
192 | }; |
193 | ||
194 | struct iso_interrupt_event { | |
195 | struct event event; | |
196 | struct fw_cdev_event_iso_interrupt interrupt; | |
197 | }; | |
198 | ||
872e330e SR |
199 | struct iso_interrupt_mc_event { |
200 | struct event event; | |
201 | struct fw_cdev_event_iso_interrupt_mc interrupt; | |
202 | }; | |
203 | ||
b1bda4cd JFSR |
204 | struct iso_resource_event { |
205 | struct event event; | |
e21fcf79 | 206 | struct fw_cdev_event_iso_resource iso_resource; |
b1bda4cd JFSR |
207 | }; |
208 | ||
850bb6f2 SR |
209 | struct outbound_phy_packet_event { |
210 | struct event event; | |
211 | struct client *client; | |
212 | struct fw_packet p; | |
213 | struct fw_cdev_event_phy_packet phy_packet; | |
214 | }; | |
215 | ||
bf54e146 SR |
216 | struct inbound_phy_packet_event { |
217 | struct event event; | |
218 | struct fw_cdev_event_phy_packet phy_packet; | |
219 | }; | |
220 | ||
9c1176b6 SR |
221 | #ifdef CONFIG_COMPAT |
222 | static void __user *u64_to_uptr(u64 value) | |
223 | { | |
224 | if (is_compat_task()) | |
225 | return compat_ptr(value); | |
226 | else | |
227 | return (void __user *)(unsigned long)value; | |
228 | } | |
229 | ||
230 | static u64 uptr_to_u64(void __user *ptr) | |
231 | { | |
232 | if (is_compat_task()) | |
233 | return ptr_to_compat(ptr); | |
234 | else | |
235 | return (u64)(unsigned long)ptr; | |
236 | } | |
237 | #else | |
238 | static inline void __user *u64_to_uptr(u64 value) | |
19a15b93 KH |
239 | { |
240 | return (void __user *)(unsigned long)value; | |
241 | } | |
242 | ||
9c1176b6 | 243 | static inline u64 uptr_to_u64(void __user *ptr) |
19a15b93 | 244 | { |
9c1176b6 | 245 | return (u64)(unsigned long)ptr; |
19a15b93 | 246 | } |
9c1176b6 | 247 | #endif /* CONFIG_COMPAT */ |
19a15b93 KH |
248 | |
249 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
250 | { | |
251 | struct fw_device *device; | |
252 | struct client *client; | |
253 | ||
96b19062 | 254 | device = fw_device_get_by_devt(inode->i_rdev); |
a3aca3da KH |
255 | if (device == NULL) |
256 | return -ENODEV; | |
19a15b93 | 257 | |
551f4cb9 JF |
258 | if (fw_device_is_shutdown(device)) { |
259 | fw_device_put(device); | |
260 | return -ENODEV; | |
261 | } | |
262 | ||
2d826cc5 | 263 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
96b19062 SR |
264 | if (client == NULL) { |
265 | fw_device_put(device); | |
19a15b93 | 266 | return -ENOMEM; |
96b19062 | 267 | } |
19a15b93 | 268 | |
96b19062 | 269 | client->device = device; |
19a15b93 | 270 | spin_lock_init(&client->lock); |
45ee3199 JF |
271 | idr_init(&client->resource_idr); |
272 | INIT_LIST_HEAD(&client->event_list); | |
19a15b93 | 273 | init_waitqueue_head(&client->wait); |
5a5e62da | 274 | init_waitqueue_head(&client->tx_flush_wait); |
bf54e146 | 275 | INIT_LIST_HEAD(&client->phy_receiver_link); |
93b37905 | 276 | INIT_LIST_HEAD(&client->link); |
fb443036 | 277 | kref_init(&client->kref); |
19a15b93 KH |
278 | |
279 | file->private_data = client; | |
280 | ||
3ac26b2e | 281 | return nonseekable_open(inode, file); |
19a15b93 KH |
282 | } |
283 | ||
284 | static void queue_event(struct client *client, struct event *event, | |
285 | void *data0, size_t size0, void *data1, size_t size1) | |
286 | { | |
287 | unsigned long flags; | |
288 | ||
289 | event->v[0].data = data0; | |
290 | event->v[0].size = size0; | |
291 | event->v[1].data = data1; | |
292 | event->v[1].size = size1; | |
293 | ||
294 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
295 | if (client->in_shutdown) |
296 | kfree(event); | |
297 | else | |
298 | list_add_tail(&event->link, &client->event_list); | |
19a15b93 | 299 | spin_unlock_irqrestore(&client->lock, flags); |
83431cba JF |
300 | |
301 | wake_up_interruptible(&client->wait); | |
19a15b93 KH |
302 | } |
303 | ||
53dca511 SR |
304 | static int dequeue_event(struct client *client, |
305 | char __user *buffer, size_t count) | |
19a15b93 | 306 | { |
19a15b93 KH |
307 | struct event *event; |
308 | size_t size, total; | |
2dbd7d7e | 309 | int i, ret; |
19a15b93 | 310 | |
2dbd7d7e SR |
311 | ret = wait_event_interruptible(client->wait, |
312 | !list_empty(&client->event_list) || | |
313 | fw_device_is_shutdown(client->device)); | |
314 | if (ret < 0) | |
315 | return ret; | |
19a15b93 | 316 | |
2603bf21 KH |
317 | if (list_empty(&client->event_list) && |
318 | fw_device_is_shutdown(client->device)) | |
319 | return -ENODEV; | |
19a15b93 | 320 | |
3ba94986 | 321 | spin_lock_irq(&client->lock); |
a459b8ab | 322 | event = list_first_entry(&client->event_list, struct event, link); |
19a15b93 | 323 | list_del(&event->link); |
3ba94986 | 324 | spin_unlock_irq(&client->lock); |
19a15b93 | 325 | |
19a15b93 KH |
326 | total = 0; |
327 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
328 | size = min(event->v[i].size, count - total); | |
2603bf21 | 329 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
2dbd7d7e | 330 | ret = -EFAULT; |
19a15b93 | 331 | goto out; |
2603bf21 | 332 | } |
19a15b93 KH |
333 | total += size; |
334 | } | |
2dbd7d7e | 335 | ret = total; |
19a15b93 KH |
336 | |
337 | out: | |
338 | kfree(event); | |
339 | ||
2dbd7d7e | 340 | return ret; |
19a15b93 KH |
341 | } |
342 | ||
53dca511 SR |
343 | static ssize_t fw_device_op_read(struct file *file, char __user *buffer, |
344 | size_t count, loff_t *offset) | |
19a15b93 KH |
345 | { |
346 | struct client *client = file->private_data; | |
347 | ||
348 | return dequeue_event(client, buffer, count); | |
349 | } | |
350 | ||
53dca511 SR |
351 | static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, |
352 | struct client *client) | |
344bbc4d | 353 | { |
da8ecffa | 354 | struct fw_card *card = client->device->card; |
cf417e54 | 355 | |
3ba94986 | 356 | spin_lock_irq(&card->lock); |
344bbc4d | 357 | |
da8ecffa | 358 | event->closure = client->bus_reset_closure; |
344bbc4d | 359 | event->type = FW_CDEV_EVENT_BUS_RESET; |
cf5a56ac | 360 | event->generation = client->device->generation; |
da8ecffa | 361 | event->node_id = client->device->node_id; |
344bbc4d | 362 | event->local_node_id = card->local_node->node_id; |
250b2b6d | 363 | event->bm_node_id = card->bm_node_id; |
344bbc4d KH |
364 | event->irm_node_id = card->irm_node->node_id; |
365 | event->root_node_id = card->root_node->node_id; | |
cf417e54 | 366 | |
3ba94986 | 367 | spin_unlock_irq(&card->lock); |
344bbc4d KH |
368 | } |
369 | ||
53dca511 SR |
370 | static void for_each_client(struct fw_device *device, |
371 | void (*callback)(struct client *client)) | |
2603bf21 | 372 | { |
2603bf21 | 373 | struct client *c; |
2603bf21 | 374 | |
d67cfb96 | 375 | mutex_lock(&device->client_list_mutex); |
2603bf21 KH |
376 | list_for_each_entry(c, &device->client_list, link) |
377 | callback(c); | |
d67cfb96 | 378 | mutex_unlock(&device->client_list_mutex); |
2603bf21 KH |
379 | } |
380 | ||
b1bda4cd JFSR |
381 | static int schedule_reallocations(int id, void *p, void *data) |
382 | { | |
9fb551bf | 383 | schedule_if_iso_resource(p); |
b1bda4cd | 384 | |
b1bda4cd JFSR |
385 | return 0; |
386 | } | |
387 | ||
53dca511 | 388 | static void queue_bus_reset_event(struct client *client) |
97bd9efa | 389 | { |
97c18b7f | 390 | struct bus_reset_event *e; |
97bd9efa | 391 | |
97c18b7f | 392 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
cfb0c9d1 | 393 | if (e == NULL) |
97bd9efa | 394 | return; |
97bd9efa | 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; |
d1bbd209 | 441 | struct fw_cdev_flush_iso flush_iso; |
6e95dea7 SR |
442 | }; |
443 | ||
444 | static int ioctl_get_info(struct client *client, union ioctl_arg *arg) | |
19a15b93 | 445 | { |
6e95dea7 | 446 | struct fw_cdev_get_info *a = &arg->get_info; |
344bbc4d | 447 | struct fw_cdev_event_bus_reset bus_reset; |
c9755e14 | 448 | unsigned long ret = 0; |
344bbc4d | 449 | |
6e95dea7 | 450 | client->version = a->version; |
604f4516 | 451 | a->version = FW_CDEV_KERNEL_VERSION; |
6e95dea7 | 452 | a->card = client->device->card->index; |
344bbc4d | 453 | |
c9755e14 SR |
454 | down_read(&fw_device_rwsem); |
455 | ||
6e95dea7 SR |
456 | if (a->rom != 0) { |
457 | size_t want = a->rom_length; | |
d84702a5 | 458 | size_t have = client->device->config_rom_length * 4; |
344bbc4d | 459 | |
6e95dea7 SR |
460 | ret = copy_to_user(u64_to_uptr(a->rom), |
461 | client->device->config_rom, min(want, have)); | |
344bbc4d | 462 | } |
6e95dea7 | 463 | a->rom_length = client->device->config_rom_length * 4; |
344bbc4d | 464 | |
c9755e14 SR |
465 | up_read(&fw_device_rwsem); |
466 | ||
467 | if (ret != 0) | |
468 | return -EFAULT; | |
469 | ||
93b37905 SR |
470 | mutex_lock(&client->device->client_list_mutex); |
471 | ||
6e95dea7 SR |
472 | client->bus_reset_closure = a->bus_reset_closure; |
473 | if (a->bus_reset != 0) { | |
da8ecffa | 474 | fill_bus_reset_event(&bus_reset, client); |
790198f7 SR |
475 | /* unaligned size of bus_reset is 36 bytes */ |
476 | ret = copy_to_user(u64_to_uptr(a->bus_reset), &bus_reset, 36); | |
344bbc4d | 477 | } |
93b37905 SR |
478 | if (ret == 0 && list_empty(&client->link)) |
479 | list_add_tail(&client->link, &client->device->client_list); | |
19a15b93 | 480 | |
93b37905 SR |
481 | mutex_unlock(&client->device->client_list_mutex); |
482 | ||
483 | return ret ? -EFAULT : 0; | |
19a15b93 KH |
484 | } |
485 | ||
53dca511 SR |
486 | static int add_client_resource(struct client *client, |
487 | struct client_resource *resource, gfp_t gfp_mask) | |
3964a449 | 488 | { |
0a419818 | 489 | bool preload = !!(gfp_mask & __GFP_WAIT); |
3964a449 | 490 | unsigned long flags; |
45ee3199 JF |
491 | int ret; |
492 | ||
37b61890 TH |
493 | if (preload) |
494 | idr_preload(gfp_mask); | |
3964a449 | 495 | spin_lock_irqsave(&client->lock, flags); |
37b61890 | 496 | |
45ee3199 JF |
497 | if (client->in_shutdown) |
498 | ret = -ECANCELED; | |
499 | else | |
37b61890 TH |
500 | ret = idr_alloc(&client->resource_idr, resource, 0, 0, |
501 | GFP_NOWAIT); | |
b1bda4cd | 502 | if (ret >= 0) { |
37b61890 | 503 | resource->handle = ret; |
fb443036 | 504 | client_get(client); |
9fb551bf | 505 | schedule_if_iso_resource(resource); |
b1bda4cd | 506 | } |
45ee3199 | 507 | |
37b61890 TH |
508 | spin_unlock_irqrestore(&client->lock, flags); |
509 | if (preload) | |
510 | idr_preload_end(); | |
45ee3199 JF |
511 | |
512 | return ret < 0 ? ret : 0; | |
3964a449 KH |
513 | } |
514 | ||
53dca511 SR |
515 | static int release_client_resource(struct client *client, u32 handle, |
516 | client_resource_release_fn_t release, | |
e21fcf79 | 517 | struct client_resource **return_resource) |
3964a449 | 518 | { |
e21fcf79 | 519 | struct client_resource *resource; |
3964a449 | 520 | |
3ba94986 | 521 | spin_lock_irq(&client->lock); |
45ee3199 | 522 | if (client->in_shutdown) |
e21fcf79 | 523 | resource = NULL; |
45ee3199 | 524 | else |
e21fcf79 SR |
525 | resource = idr_find(&client->resource_idr, handle); |
526 | if (resource && resource->release == release) | |
45ee3199 | 527 | idr_remove(&client->resource_idr, handle); |
3ba94986 | 528 | spin_unlock_irq(&client->lock); |
3964a449 | 529 | |
e21fcf79 | 530 | if (!(resource && resource->release == release)) |
3964a449 KH |
531 | return -EINVAL; |
532 | ||
e21fcf79 SR |
533 | if (return_resource) |
534 | *return_resource = resource; | |
3964a449 | 535 | else |
e21fcf79 | 536 | resource->release(client, resource); |
3964a449 | 537 | |
fb443036 SR |
538 | client_put(client); |
539 | ||
3964a449 KH |
540 | return 0; |
541 | } | |
542 | ||
53dca511 SR |
543 | static void release_transaction(struct client *client, |
544 | struct client_resource *resource) | |
3964a449 | 545 | { |
3964a449 KH |
546 | } |
547 | ||
53dca511 SR |
548 | static void complete_transaction(struct fw_card *card, int rcode, |
549 | void *payload, size_t length, void *data) | |
19a15b93 | 550 | { |
97c18b7f SR |
551 | struct outbound_transaction_event *e = data; |
552 | struct fw_cdev_event_response *rsp = &e->response; | |
553 | struct client *client = e->client; | |
28cf6a04 | 554 | unsigned long flags; |
19a15b93 | 555 | |
97c18b7f SR |
556 | if (length < rsp->length) |
557 | rsp->length = length; | |
19a15b93 | 558 | if (rcode == RCODE_COMPLETE) |
97c18b7f | 559 | memcpy(rsp->data, payload, rsp->length); |
19a15b93 | 560 | |
28cf6a04 | 561 | spin_lock_irqsave(&client->lock, flags); |
5a5e62da CL |
562 | idr_remove(&client->resource_idr, e->r.resource.handle); |
563 | if (client->in_shutdown) | |
564 | wake_up(&client->tx_flush_wait); | |
28cf6a04 KH |
565 | spin_unlock_irqrestore(&client->lock, flags); |
566 | ||
97c18b7f SR |
567 | rsp->type = FW_CDEV_EVENT_RESPONSE; |
568 | rsp->rcode = rcode; | |
8401d92b DM |
569 | |
570 | /* | |
97c18b7f | 571 | * In the case that sizeof(*rsp) doesn't align with the position of the |
8401d92b DM |
572 | * data, and the read is short, preserve an extra copy of the data |
573 | * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless | |
574 | * for short reads and some apps depended on it, this is both safe | |
575 | * and prudent for compatibility. | |
576 | */ | |
97c18b7f SR |
577 | if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data)) |
578 | queue_event(client, &e->event, rsp, sizeof(*rsp), | |
579 | rsp->data, rsp->length); | |
8401d92b | 580 | else |
97c18b7f | 581 | queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length, |
8401d92b | 582 | NULL, 0); |
fb443036 | 583 | |
5a5e62da CL |
584 | /* Drop the idr's reference */ |
585 | client_put(client); | |
19a15b93 KH |
586 | } |
587 | ||
acfe8333 JFSR |
588 | static int init_request(struct client *client, |
589 | struct fw_cdev_send_request *request, | |
590 | int destination_id, int speed) | |
19a15b93 | 591 | { |
97c18b7f | 592 | struct outbound_transaction_event *e; |
1f3125af | 593 | int ret; |
19a15b93 | 594 | |
18e9b10f SR |
595 | if (request->tcode != TCODE_STREAM_DATA && |
596 | (request->length > 4096 || request->length > 512 << speed)) | |
5d3fd692 | 597 | return -EIO; |
19a15b93 | 598 | |
a8e93f3d CL |
599 | if (request->tcode == TCODE_WRITE_QUADLET_REQUEST && |
600 | request->length < 4) | |
601 | return -EINVAL; | |
602 | ||
97c18b7f SR |
603 | e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL); |
604 | if (e == NULL) | |
19a15b93 KH |
605 | return -ENOMEM; |
606 | ||
97c18b7f SR |
607 | e->client = client; |
608 | e->response.length = request->length; | |
609 | e->response.closure = request->closure; | |
19a15b93 | 610 | |
4f259223 | 611 | if (request->data && |
97c18b7f | 612 | copy_from_user(e->response.data, |
4f259223 | 613 | u64_to_uptr(request->data), request->length)) { |
1f3125af | 614 | ret = -EFAULT; |
45ee3199 | 615 | goto failed; |
1f3125af SR |
616 | } |
617 | ||
97c18b7f SR |
618 | e->r.resource.release = release_transaction; |
619 | ret = add_client_resource(client, &e->r.resource, GFP_KERNEL); | |
45ee3199 JF |
620 | if (ret < 0) |
621 | goto failed; | |
28cf6a04 | 622 | |
acfe8333 | 623 | fw_send_request(client->device->card, &e->r.transaction, |
664d8010 SR |
624 | request->tcode, destination_id, request->generation, |
625 | speed, request->offset, e->response.data, | |
626 | request->length, complete_transaction, e); | |
627 | return 0; | |
19a15b93 | 628 | |
45ee3199 | 629 | failed: |
97c18b7f | 630 | kfree(e); |
1f3125af SR |
631 | |
632 | return ret; | |
19a15b93 KH |
633 | } |
634 | ||
6e95dea7 | 635 | static int ioctl_send_request(struct client *client, union ioctl_arg *arg) |
acfe8333 | 636 | { |
6e95dea7 | 637 | switch (arg->send_request.tcode) { |
acfe8333 JFSR |
638 | case TCODE_WRITE_QUADLET_REQUEST: |
639 | case TCODE_WRITE_BLOCK_REQUEST: | |
640 | case TCODE_READ_QUADLET_REQUEST: | |
641 | case TCODE_READ_BLOCK_REQUEST: | |
642 | case TCODE_LOCK_MASK_SWAP: | |
643 | case TCODE_LOCK_COMPARE_SWAP: | |
644 | case TCODE_LOCK_FETCH_ADD: | |
645 | case TCODE_LOCK_LITTLE_ADD: | |
646 | case TCODE_LOCK_BOUNDED_ADD: | |
647 | case TCODE_LOCK_WRAP_ADD: | |
648 | case TCODE_LOCK_VENDOR_DEPENDENT: | |
649 | break; | |
650 | default: | |
651 | return -EINVAL; | |
652 | } | |
653 | ||
6e95dea7 | 654 | return init_request(client, &arg->send_request, client->device->node_id, |
acfe8333 JFSR |
655 | client->device->max_speed); |
656 | } | |
657 | ||
281e2032 SR |
658 | static inline bool is_fcp_request(struct fw_request *request) |
659 | { | |
660 | return request == NULL; | |
661 | } | |
662 | ||
53dca511 SR |
663 | static void release_request(struct client *client, |
664 | struct client_resource *resource) | |
3964a449 | 665 | { |
97c18b7f SR |
666 | struct inbound_transaction_resource *r = container_of(resource, |
667 | struct inbound_transaction_resource, resource); | |
3964a449 | 668 | |
281e2032 SR |
669 | if (is_fcp_request(r->request)) |
670 | kfree(r->data); | |
671 | else | |
08bd34c9 | 672 | fw_send_response(r->card, r->request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
673 | |
674 | fw_card_put(r->card); | |
97c18b7f | 675 | kfree(r); |
3964a449 KH |
676 | } |
677 | ||
97c18b7f | 678 | static void handle_request(struct fw_card *card, struct fw_request *request, |
53dca511 | 679 | int tcode, int destination, int source, |
33e553fe | 680 | int generation, unsigned long long offset, |
53dca511 | 681 | void *payload, size_t length, void *callback_data) |
19a15b93 | 682 | { |
97c18b7f SR |
683 | struct address_handler_resource *handler = callback_data; |
684 | struct inbound_transaction_resource *r; | |
685 | struct inbound_transaction_event *e; | |
e205597d | 686 | size_t event_size0; |
281e2032 | 687 | void *fcp_frame = NULL; |
45ee3199 | 688 | int ret; |
19a15b93 | 689 | |
0244f573 SR |
690 | /* card may be different from handler->client->device->card */ |
691 | fw_card_get(card); | |
692 | ||
97c18b7f | 693 | r = kmalloc(sizeof(*r), GFP_ATOMIC); |
2d826cc5 | 694 | e = kmalloc(sizeof(*e), GFP_ATOMIC); |
cfb0c9d1 | 695 | if (r == NULL || e == NULL) |
45ee3199 | 696 | goto failed; |
cfb0c9d1 | 697 | |
08bd34c9 | 698 | r->card = card; |
97c18b7f SR |
699 | r->request = request; |
700 | r->data = payload; | |
701 | r->length = length; | |
19a15b93 | 702 | |
281e2032 SR |
703 | if (is_fcp_request(request)) { |
704 | /* | |
705 | * FIXME: Let core-transaction.c manage a | |
706 | * single reference-counted copy? | |
707 | */ | |
708 | fcp_frame = kmemdup(payload, length, GFP_ATOMIC); | |
709 | if (fcp_frame == NULL) | |
710 | goto failed; | |
711 | ||
712 | r->data = fcp_frame; | |
713 | } | |
714 | ||
97c18b7f SR |
715 | r->resource.release = release_request; |
716 | ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC); | |
45ee3199 JF |
717 | if (ret < 0) |
718 | goto failed; | |
19a15b93 | 719 | |
e205597d SR |
720 | if (handler->client->version < FW_CDEV_VERSION_EVENT_REQUEST2) { |
721 | struct fw_cdev_event_request *req = &e->req.request; | |
722 | ||
723 | if (tcode & 0x10) | |
724 | tcode = TCODE_LOCK_REQUEST; | |
725 | ||
726 | req->type = FW_CDEV_EVENT_REQUEST; | |
727 | req->tcode = tcode; | |
728 | req->offset = offset; | |
729 | req->length = length; | |
730 | req->handle = r->resource.handle; | |
731 | req->closure = handler->closure; | |
732 | event_size0 = sizeof(*req); | |
733 | } else { | |
734 | struct fw_cdev_event_request2 *req = &e->req.request2; | |
735 | ||
736 | req->type = FW_CDEV_EVENT_REQUEST2; | |
737 | req->tcode = tcode; | |
738 | req->offset = offset; | |
739 | req->source_node_id = source; | |
740 | req->destination_node_id = destination; | |
741 | req->card = card->index; | |
742 | req->generation = generation; | |
743 | req->length = length; | |
744 | req->handle = r->resource.handle; | |
745 | req->closure = handler->closure; | |
746 | event_size0 = sizeof(*req); | |
747 | } | |
19a15b93 | 748 | |
97c18b7f | 749 | queue_event(handler->client, &e->event, |
e205597d | 750 | &e->req, event_size0, r->data, length); |
45ee3199 JF |
751 | return; |
752 | ||
753 | failed: | |
97c18b7f | 754 | kfree(r); |
45ee3199 | 755 | kfree(e); |
281e2032 SR |
756 | kfree(fcp_frame); |
757 | ||
758 | if (!is_fcp_request(request)) | |
db5d247a | 759 | fw_send_response(card, request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
760 | |
761 | fw_card_put(card); | |
19a15b93 KH |
762 | } |
763 | ||
53dca511 SR |
764 | static void release_address_handler(struct client *client, |
765 | struct client_resource *resource) | |
3964a449 | 766 | { |
97c18b7f SR |
767 | struct address_handler_resource *r = |
768 | container_of(resource, struct address_handler_resource, resource); | |
3964a449 | 769 | |
97c18b7f SR |
770 | fw_core_remove_address_handler(&r->handler); |
771 | kfree(r); | |
3964a449 KH |
772 | } |
773 | ||
6e95dea7 | 774 | static int ioctl_allocate(struct client *client, union ioctl_arg *arg) |
19a15b93 | 775 | { |
6e95dea7 | 776 | struct fw_cdev_allocate *a = &arg->allocate; |
97c18b7f | 777 | struct address_handler_resource *r; |
19a15b93 | 778 | struct fw_address_region region; |
45ee3199 | 779 | int ret; |
19a15b93 | 780 | |
97c18b7f SR |
781 | r = kmalloc(sizeof(*r), GFP_KERNEL); |
782 | if (r == NULL) | |
19a15b93 KH |
783 | return -ENOMEM; |
784 | ||
6e95dea7 | 785 | region.start = a->offset; |
8e2b2b46 SR |
786 | if (client->version < FW_CDEV_VERSION_ALLOCATE_REGION_END) |
787 | region.end = a->offset + a->length; | |
788 | else | |
789 | region.end = a->region_end; | |
790 | ||
6e95dea7 | 791 | r->handler.length = a->length; |
97c18b7f | 792 | r->handler.address_callback = handle_request; |
6e95dea7 SR |
793 | r->handler.callback_data = r; |
794 | r->closure = a->closure; | |
795 | r->client = client; | |
19a15b93 | 796 | |
97c18b7f | 797 | ret = fw_core_add_address_handler(&r->handler, ®ion); |
3e0b5f0d | 798 | if (ret < 0) { |
97c18b7f | 799 | kfree(r); |
3e0b5f0d | 800 | return ret; |
19a15b93 | 801 | } |
8e2b2b46 | 802 | a->offset = r->handler.offset; |
19a15b93 | 803 | |
97c18b7f SR |
804 | r->resource.release = release_address_handler; |
805 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 806 | if (ret < 0) { |
97c18b7f | 807 | release_address_handler(client, &r->resource); |
45ee3199 JF |
808 | return ret; |
809 | } | |
6e95dea7 | 810 | a->handle = r->resource.handle; |
19a15b93 KH |
811 | |
812 | return 0; | |
813 | } | |
814 | ||
6e95dea7 | 815 | static int ioctl_deallocate(struct client *client, union ioctl_arg *arg) |
9472316b | 816 | { |
6e95dea7 | 817 | return release_client_resource(client, arg->deallocate.handle, |
45ee3199 | 818 | release_address_handler, NULL); |
9472316b KH |
819 | } |
820 | ||
6e95dea7 | 821 | static int ioctl_send_response(struct client *client, union ioctl_arg *arg) |
19a15b93 | 822 | { |
6e95dea7 | 823 | struct fw_cdev_send_response *a = &arg->send_response; |
3964a449 | 824 | struct client_resource *resource; |
97c18b7f | 825 | struct inbound_transaction_resource *r; |
7e44c0b5 | 826 | int ret = 0; |
19a15b93 | 827 | |
6e95dea7 | 828 | if (release_client_resource(client, a->handle, |
45ee3199 | 829 | release_request, &resource) < 0) |
19a15b93 | 830 | return -EINVAL; |
45ee3199 | 831 | |
97c18b7f SR |
832 | r = container_of(resource, struct inbound_transaction_resource, |
833 | resource); | |
281e2032 SR |
834 | if (is_fcp_request(r->request)) |
835 | goto out; | |
836 | ||
a10c0ce7 CL |
837 | if (a->length != fw_get_response_length(r->request)) { |
838 | ret = -EINVAL; | |
839 | kfree(r->request); | |
840 | goto out; | |
841 | } | |
842 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length)) { | |
281e2032 SR |
843 | ret = -EFAULT; |
844 | kfree(r->request); | |
845 | goto out; | |
7e44c0b5 | 846 | } |
08bd34c9 | 847 | fw_send_response(r->card, r->request, a->rcode); |
7e44c0b5 | 848 | out: |
0244f573 | 849 | fw_card_put(r->card); |
19a15b93 KH |
850 | kfree(r); |
851 | ||
7e44c0b5 | 852 | return ret; |
19a15b93 KH |
853 | } |
854 | ||
6e95dea7 | 855 | static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg) |
5371842b | 856 | { |
02d37bed | 857 | fw_schedule_bus_reset(client->device->card, true, |
6e95dea7 | 858 | arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET); |
02d37bed | 859 | return 0; |
5371842b KH |
860 | } |
861 | ||
3964a449 KH |
862 | static void release_descriptor(struct client *client, |
863 | struct client_resource *resource) | |
864 | { | |
97c18b7f SR |
865 | struct descriptor_resource *r = |
866 | container_of(resource, struct descriptor_resource, resource); | |
3964a449 | 867 | |
97c18b7f SR |
868 | fw_core_remove_descriptor(&r->descriptor); |
869 | kfree(r); | |
3964a449 KH |
870 | } |
871 | ||
6e95dea7 | 872 | static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 873 | { |
6e95dea7 | 874 | struct fw_cdev_add_descriptor *a = &arg->add_descriptor; |
97c18b7f | 875 | struct descriptor_resource *r; |
45ee3199 | 876 | int ret; |
66dea3e5 | 877 | |
de487da8 | 878 | /* Access policy: Allow this ioctl only on local nodes' device files. */ |
92368890 | 879 | if (!client->device->is_local) |
de487da8 SR |
880 | return -ENOSYS; |
881 | ||
6e95dea7 | 882 | if (a->length > 256) |
66dea3e5 KH |
883 | return -EINVAL; |
884 | ||
6e95dea7 | 885 | r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL); |
97c18b7f | 886 | if (r == NULL) |
66dea3e5 KH |
887 | return -ENOMEM; |
888 | ||
6e95dea7 | 889 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) { |
45ee3199 JF |
890 | ret = -EFAULT; |
891 | goto failed; | |
66dea3e5 KH |
892 | } |
893 | ||
6e95dea7 SR |
894 | r->descriptor.length = a->length; |
895 | r->descriptor.immediate = a->immediate; | |
896 | r->descriptor.key = a->key; | |
97c18b7f | 897 | r->descriptor.data = r->data; |
66dea3e5 | 898 | |
97c18b7f | 899 | ret = fw_core_add_descriptor(&r->descriptor); |
45ee3199 JF |
900 | if (ret < 0) |
901 | goto failed; | |
66dea3e5 | 902 | |
97c18b7f SR |
903 | r->resource.release = release_descriptor; |
904 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 905 | if (ret < 0) { |
97c18b7f | 906 | fw_core_remove_descriptor(&r->descriptor); |
45ee3199 JF |
907 | goto failed; |
908 | } | |
6e95dea7 | 909 | a->handle = r->resource.handle; |
66dea3e5 KH |
910 | |
911 | return 0; | |
45ee3199 | 912 | failed: |
97c18b7f | 913 | kfree(r); |
45ee3199 JF |
914 | |
915 | return ret; | |
66dea3e5 KH |
916 | } |
917 | ||
6e95dea7 | 918 | static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 919 | { |
6e95dea7 | 920 | return release_client_resource(client, arg->remove_descriptor.handle, |
45ee3199 | 921 | release_descriptor, NULL); |
66dea3e5 KH |
922 | } |
923 | ||
53dca511 SR |
924 | static void iso_callback(struct fw_iso_context *context, u32 cycle, |
925 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
926 | { |
927 | struct client *client = data; | |
97c18b7f | 928 | struct iso_interrupt_event *e; |
19a15b93 | 929 | |
56d04cb1 | 930 | e = kmalloc(sizeof(*e) + header_length, GFP_ATOMIC); |
cfb0c9d1 | 931 | if (e == NULL) |
19a15b93 | 932 | return; |
cfb0c9d1 | 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); | |
cfb0c9d1 | 950 | if (e == NULL) |
872e330e | 951 | return; |
cfb0c9d1 | 952 | |
872e330e SR |
953 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL; |
954 | e->interrupt.closure = client->iso_closure; | |
955 | e->interrupt.completed = fw_iso_buffer_lookup(&client->buffer, | |
956 | completed); | |
957 | queue_event(client, &e->event, &e->interrupt, | |
958 | sizeof(e->interrupt), NULL, 0); | |
959 | } | |
960 | ||
0b6c4857 SR |
961 | static enum dma_data_direction iso_dma_direction(struct fw_iso_context *context) |
962 | { | |
963 | if (context->type == FW_ISO_CONTEXT_TRANSMIT) | |
964 | return DMA_TO_DEVICE; | |
965 | else | |
966 | return DMA_FROM_DEVICE; | |
967 | } | |
968 | ||
6e95dea7 | 969 | static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) |
19a15b93 | 970 | { |
6e95dea7 | 971 | struct fw_cdev_create_iso_context *a = &arg->create_iso_context; |
24315c5e | 972 | struct fw_iso_context *context; |
872e330e | 973 | fw_iso_callback_t cb; |
0b6c4857 | 974 | int ret; |
19a15b93 | 975 | |
eb5b35a5 | 976 | BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT != FW_ISO_CONTEXT_TRANSMIT || |
872e330e SR |
977 | FW_CDEV_ISO_CONTEXT_RECEIVE != FW_ISO_CONTEXT_RECEIVE || |
978 | FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL != | |
979 | FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL); | |
21efb3cf | 980 | |
6e95dea7 | 981 | switch (a->type) { |
872e330e SR |
982 | case FW_ISO_CONTEXT_TRANSMIT: |
983 | if (a->speed > SCODE_3200 || a->channel > 63) | |
c70dc788 | 984 | return -EINVAL; |
872e330e SR |
985 | |
986 | cb = iso_callback; | |
c70dc788 KH |
987 | break; |
988 | ||
872e330e SR |
989 | case FW_ISO_CONTEXT_RECEIVE: |
990 | if (a->header_size < 4 || (a->header_size & 3) || | |
991 | a->channel > 63) | |
c70dc788 | 992 | return -EINVAL; |
872e330e SR |
993 | |
994 | cb = iso_callback; | |
995 | break; | |
996 | ||
997 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
998 | cb = (fw_iso_callback_t)iso_mc_callback; | |
c70dc788 KH |
999 | break; |
1000 | ||
1001 | default: | |
21efb3cf | 1002 | return -EINVAL; |
c70dc788 KH |
1003 | } |
1004 | ||
6e95dea7 | 1005 | context = fw_iso_context_create(client->device->card, a->type, |
872e330e | 1006 | a->channel, a->speed, a->header_size, cb, client); |
24315c5e KH |
1007 | if (IS_ERR(context)) |
1008 | return PTR_ERR(context); | |
0699a73a CL |
1009 | if (client->version < FW_CDEV_VERSION_AUTO_FLUSH_ISO_OVERFLOW) |
1010 | context->drop_overflow_headers = true; | |
24315c5e | 1011 | |
bdfe273e CL |
1012 | /* We only support one context at this time. */ |
1013 | spin_lock_irq(&client->lock); | |
1014 | if (client->iso_context != NULL) { | |
1015 | spin_unlock_irq(&client->lock); | |
1016 | fw_iso_context_destroy(context); | |
0b6c4857 | 1017 | |
bdfe273e CL |
1018 | return -EBUSY; |
1019 | } | |
0b6c4857 SR |
1020 | if (!client->buffer_is_mapped) { |
1021 | ret = fw_iso_buffer_map_dma(&client->buffer, | |
1022 | client->device->card, | |
1023 | iso_dma_direction(context)); | |
1024 | if (ret < 0) { | |
1025 | spin_unlock_irq(&client->lock); | |
1026 | fw_iso_context_destroy(context); | |
1027 | ||
1028 | return ret; | |
1029 | } | |
1030 | client->buffer_is_mapped = true; | |
1031 | } | |
6e95dea7 | 1032 | client->iso_closure = a->closure; |
24315c5e | 1033 | client->iso_context = context; |
bdfe273e | 1034 | spin_unlock_irq(&client->lock); |
19a15b93 | 1035 | |
6e95dea7 | 1036 | a->handle = 0; |
abaa5743 | 1037 | |
19a15b93 KH |
1038 | return 0; |
1039 | } | |
1040 | ||
872e330e SR |
1041 | static int ioctl_set_iso_channels(struct client *client, union ioctl_arg *arg) |
1042 | { | |
1043 | struct fw_cdev_set_iso_channels *a = &arg->set_iso_channels; | |
1044 | struct fw_iso_context *ctx = client->iso_context; | |
1045 | ||
1046 | if (ctx == NULL || a->handle != 0) | |
1047 | return -EINVAL; | |
1048 | ||
1049 | return fw_iso_context_set_channels(ctx, &a->channels); | |
1050 | } | |
1051 | ||
1ca31ae7 KH |
1052 | /* Macros for decoding the iso packet control header. */ |
1053 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) | |
1054 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) | |
1055 | #define GET_SKIP(v) (((v) >> 17) & 0x01) | |
7a100344 SR |
1056 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
1057 | #define GET_SY(v) (((v) >> 20) & 0x0f) | |
1ca31ae7 KH |
1058 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
1059 | ||
6e95dea7 | 1060 | static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1061 | { |
6e95dea7 | 1062 | struct fw_cdev_queue_iso *a = &arg->queue_iso; |
19a15b93 | 1063 | struct fw_cdev_iso_packet __user *p, *end, *next; |
9b32d5f3 | 1064 | struct fw_iso_context *ctx = client->iso_context; |
872e330e | 1065 | unsigned long payload, buffer_end, transmit_header_bytes = 0; |
1ca31ae7 | 1066 | u32 control; |
19a15b93 KH |
1067 | int count; |
1068 | struct { | |
1069 | struct fw_iso_packet packet; | |
1070 | u8 header[256]; | |
1071 | } u; | |
1072 | ||
6e95dea7 | 1073 | if (ctx == NULL || a->handle != 0) |
19a15b93 | 1074 | return -EINVAL; |
19a15b93 | 1075 | |
c781c06d KH |
1076 | /* |
1077 | * If the user passes a non-NULL data pointer, has mmap()'ed | |
19a15b93 KH |
1078 | * the iso buffer, and the pointer points inside the buffer, |
1079 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 1080 | * set them both to 0, which will still let packets with |
19a15b93 KH |
1081 | * payload_length == 0 through. In other words, if no packets |
1082 | * use the indirect payload, the iso buffer need not be mapped | |
6e95dea7 | 1083 | * and the a->data pointer is ignored. |
c781c06d | 1084 | */ |
6e95dea7 | 1085 | payload = (unsigned long)a->data - client->vm_start; |
ef370ee7 | 1086 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
6e95dea7 | 1087 | if (a->data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 1088 | payload >= buffer_end) { |
9aad8125 | 1089 | payload = 0; |
ef370ee7 | 1090 | buffer_end = 0; |
19a15b93 KH |
1091 | } |
1092 | ||
872e330e SR |
1093 | if (ctx->type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL && payload & 3) |
1094 | return -EINVAL; | |
1ccc9147 | 1095 | |
872e330e | 1096 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets); |
6e95dea7 | 1097 | if (!access_ok(VERIFY_READ, p, a->size)) |
19a15b93 KH |
1098 | return -EFAULT; |
1099 | ||
6e95dea7 | 1100 | end = (void __user *)p + a->size; |
19a15b93 KH |
1101 | count = 0; |
1102 | while (p < end) { | |
1ca31ae7 | 1103 | if (get_user(control, &p->control)) |
19a15b93 | 1104 | return -EFAULT; |
1ca31ae7 KH |
1105 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
1106 | u.packet.interrupt = GET_INTERRUPT(control); | |
1107 | u.packet.skip = GET_SKIP(control); | |
1108 | u.packet.tag = GET_TAG(control); | |
1109 | u.packet.sy = GET_SY(control); | |
1110 | u.packet.header_length = GET_HEADER_LENGTH(control); | |
295e3feb | 1111 | |
872e330e SR |
1112 | switch (ctx->type) { |
1113 | case FW_ISO_CONTEXT_TRANSMIT: | |
1114 | if (u.packet.header_length & 3) | |
385ab5bc | 1115 | return -EINVAL; |
ae2a9766 | 1116 | transmit_header_bytes = u.packet.header_length; |
872e330e SR |
1117 | break; |
1118 | ||
1119 | case FW_ISO_CONTEXT_RECEIVE: | |
69e61d0c SR |
1120 | if (u.packet.header_length == 0 || |
1121 | u.packet.header_length % ctx->header_size != 0) | |
385ab5bc | 1122 | return -EINVAL; |
872e330e SR |
1123 | break; |
1124 | ||
1125 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
1126 | if (u.packet.payload_length == 0 || | |
1127 | u.packet.payload_length & 3) | |
295e3feb | 1128 | return -EINVAL; |
872e330e | 1129 | break; |
295e3feb KH |
1130 | } |
1131 | ||
19a15b93 | 1132 | next = (struct fw_cdev_iso_packet __user *) |
ae2a9766 | 1133 | &p->header[transmit_header_bytes / 4]; |
19a15b93 KH |
1134 | if (next > end) |
1135 | return -EINVAL; | |
1136 | if (__copy_from_user | |
ae2a9766 | 1137 | (u.packet.header, p->header, transmit_header_bytes)) |
19a15b93 | 1138 | return -EFAULT; |
98b6cbe8 | 1139 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
1140 | u.packet.header_length + u.packet.payload_length > 0) |
1141 | return -EINVAL; | |
ef370ee7 | 1142 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
1143 | return -EINVAL; |
1144 | ||
9b32d5f3 KH |
1145 | if (fw_iso_context_queue(ctx, &u.packet, |
1146 | &client->buffer, payload)) | |
19a15b93 KH |
1147 | break; |
1148 | ||
1149 | p = next; | |
1150 | payload += u.packet.payload_length; | |
1151 | count++; | |
1152 | } | |
13882a82 | 1153 | fw_iso_context_queue_flush(ctx); |
19a15b93 | 1154 | |
6e95dea7 SR |
1155 | a->size -= uptr_to_u64(p) - a->packets; |
1156 | a->packets = uptr_to_u64(p); | |
1157 | a->data = client->vm_start + payload; | |
19a15b93 KH |
1158 | |
1159 | return count; | |
1160 | } | |
1161 | ||
6e95dea7 | 1162 | static int ioctl_start_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1163 | { |
6e95dea7 | 1164 | struct fw_cdev_start_iso *a = &arg->start_iso; |
19a15b93 | 1165 | |
eb5b35a5 SR |
1166 | BUILD_BUG_ON( |
1167 | FW_CDEV_ISO_CONTEXT_MATCH_TAG0 != FW_ISO_CONTEXT_MATCH_TAG0 || | |
1168 | FW_CDEV_ISO_CONTEXT_MATCH_TAG1 != FW_ISO_CONTEXT_MATCH_TAG1 || | |
1169 | FW_CDEV_ISO_CONTEXT_MATCH_TAG2 != FW_ISO_CONTEXT_MATCH_TAG2 || | |
1170 | FW_CDEV_ISO_CONTEXT_MATCH_TAG3 != FW_ISO_CONTEXT_MATCH_TAG3 || | |
1171 | FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS != FW_ISO_CONTEXT_MATCH_ALL_TAGS); | |
1172 | ||
6e95dea7 | 1173 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 | 1174 | return -EINVAL; |
fae60312 | 1175 | |
6e95dea7 SR |
1176 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE && |
1177 | (a->tags == 0 || a->tags > 15 || a->sync > 15)) | |
1178 | return -EINVAL; | |
eb0306ea | 1179 | |
6e95dea7 SR |
1180 | return fw_iso_context_start(client->iso_context, |
1181 | a->cycle, a->sync, a->tags); | |
19a15b93 KH |
1182 | } |
1183 | ||
6e95dea7 | 1184 | static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg) |
b8295668 | 1185 | { |
6e95dea7 | 1186 | struct fw_cdev_stop_iso *a = &arg->stop_iso; |
abaa5743 | 1187 | |
6e95dea7 | 1188 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 KH |
1189 | return -EINVAL; |
1190 | ||
b8295668 KH |
1191 | return fw_iso_context_stop(client->iso_context); |
1192 | } | |
1193 | ||
d1bbd209 CL |
1194 | static int ioctl_flush_iso(struct client *client, union ioctl_arg *arg) |
1195 | { | |
1196 | struct fw_cdev_flush_iso *a = &arg->flush_iso; | |
1197 | ||
1198 | if (client->iso_context == NULL || a->handle != 0) | |
1199 | return -EINVAL; | |
1200 | ||
1201 | return fw_iso_context_flush_completions(client->iso_context); | |
1202 | } | |
1203 | ||
6e95dea7 | 1204 | static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg) |
a64408b9 | 1205 | { |
6e95dea7 | 1206 | struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2; |
a64408b9 | 1207 | struct fw_card *card = client->device->card; |
abfe5a01 | 1208 | struct timespec ts = {0, 0}; |
4a9bde9b | 1209 | u32 cycle_time; |
abfe5a01 | 1210 | int ret = 0; |
a64408b9 | 1211 | |
4a9bde9b | 1212 | local_irq_disable(); |
a64408b9 | 1213 | |
0fcff4e3 | 1214 | cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME); |
abfe5a01 | 1215 | |
6e95dea7 | 1216 | switch (a->clk_id) { |
889235ce TG |
1217 | case CLOCK_REALTIME: getnstimeofday(&ts); break; |
1218 | case CLOCK_MONOTONIC: ktime_get_ts(&ts); break; | |
1219 | case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts); break; | |
abfe5a01 SR |
1220 | default: |
1221 | ret = -EINVAL; | |
1222 | } | |
a64408b9 | 1223 | |
4a9bde9b | 1224 | local_irq_enable(); |
a64408b9 | 1225 | |
6e95dea7 SR |
1226 | a->tv_sec = ts.tv_sec; |
1227 | a->tv_nsec = ts.tv_nsec; | |
1228 | a->cycle_timer = cycle_time; | |
abfe5a01 SR |
1229 | |
1230 | return ret; | |
1231 | } | |
1232 | ||
6e95dea7 | 1233 | static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg) |
abfe5a01 | 1234 | { |
6e95dea7 | 1235 | struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer; |
abfe5a01 SR |
1236 | struct fw_cdev_get_cycle_timer2 ct2; |
1237 | ||
1238 | ct2.clk_id = CLOCK_REALTIME; | |
6e95dea7 | 1239 | ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2); |
abfe5a01 | 1240 | |
6e95dea7 SR |
1241 | a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC; |
1242 | a->cycle_timer = ct2.cycle_timer; | |
4a9bde9b | 1243 | |
a64408b9 SR |
1244 | return 0; |
1245 | } | |
1246 | ||
b1bda4cd JFSR |
1247 | static void iso_resource_work(struct work_struct *work) |
1248 | { | |
1249 | struct iso_resource_event *e; | |
1250 | struct iso_resource *r = | |
1251 | container_of(work, struct iso_resource, work.work); | |
1252 | struct client *client = r->client; | |
1253 | int generation, channel, bandwidth, todo; | |
1254 | bool skip, free, success; | |
1255 | ||
1256 | spin_lock_irq(&client->lock); | |
1257 | generation = client->device->generation; | |
1258 | todo = r->todo; | |
1259 | /* Allow 1000ms grace period for other reallocations. */ | |
1260 | if (todo == ISO_RES_ALLOC && | |
e71084af CL |
1261 | time_before64(get_jiffies_64(), |
1262 | client->device->card->reset_jiffies + HZ)) { | |
9fb551bf | 1263 | schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3)); |
b1bda4cd JFSR |
1264 | skip = true; |
1265 | } else { | |
1266 | /* We could be called twice within the same generation. */ | |
1267 | skip = todo == ISO_RES_REALLOC && | |
1268 | r->generation == generation; | |
1269 | } | |
1ec3c026 SR |
1270 | free = todo == ISO_RES_DEALLOC || |
1271 | todo == ISO_RES_ALLOC_ONCE || | |
1272 | todo == ISO_RES_DEALLOC_ONCE; | |
b1bda4cd JFSR |
1273 | r->generation = generation; |
1274 | spin_unlock_irq(&client->lock); | |
1275 | ||
1276 | if (skip) | |
1277 | goto out; | |
1278 | ||
1279 | bandwidth = r->bandwidth; | |
1280 | ||
1281 | fw_iso_resource_manage(client->device->card, generation, | |
1282 | r->channels, &channel, &bandwidth, | |
1ec3c026 SR |
1283 | todo == ISO_RES_ALLOC || |
1284 | todo == ISO_RES_REALLOC || | |
f30e6d3e | 1285 | todo == ISO_RES_ALLOC_ONCE); |
b1bda4cd JFSR |
1286 | /* |
1287 | * Is this generation outdated already? As long as this resource sticks | |
1288 | * in the idr, it will be scheduled again for a newer generation or at | |
1289 | * shutdown. | |
1290 | */ | |
1291 | if (channel == -EAGAIN && | |
1292 | (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC)) | |
1293 | goto out; | |
1294 | ||
1295 | success = channel >= 0 || bandwidth > 0; | |
1296 | ||
1297 | spin_lock_irq(&client->lock); | |
1298 | /* | |
1299 | * Transit from allocation to reallocation, except if the client | |
1300 | * requested deallocation in the meantime. | |
1301 | */ | |
1302 | if (r->todo == ISO_RES_ALLOC) | |
1303 | r->todo = ISO_RES_REALLOC; | |
1304 | /* | |
1305 | * Allocation or reallocation failure? Pull this resource out of the | |
1306 | * idr and prepare for deletion, unless the client is shutting down. | |
1307 | */ | |
1308 | if (r->todo == ISO_RES_REALLOC && !success && | |
1309 | !client->in_shutdown && | |
1310 | idr_find(&client->resource_idr, r->resource.handle)) { | |
1311 | idr_remove(&client->resource_idr, r->resource.handle); | |
1312 | client_put(client); | |
1313 | free = true; | |
1314 | } | |
1315 | spin_unlock_irq(&client->lock); | |
1316 | ||
1317 | if (todo == ISO_RES_ALLOC && channel >= 0) | |
5d9cb7d2 | 1318 | r->channels = 1ULL << channel; |
b1bda4cd JFSR |
1319 | |
1320 | if (todo == ISO_RES_REALLOC && success) | |
1321 | goto out; | |
1322 | ||
1ec3c026 | 1323 | if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) { |
b1bda4cd JFSR |
1324 | e = r->e_alloc; |
1325 | r->e_alloc = NULL; | |
1326 | } else { | |
1327 | e = r->e_dealloc; | |
1328 | r->e_dealloc = NULL; | |
1329 | } | |
e21fcf79 SR |
1330 | e->iso_resource.handle = r->resource.handle; |
1331 | e->iso_resource.channel = channel; | |
1332 | e->iso_resource.bandwidth = bandwidth; | |
b1bda4cd JFSR |
1333 | |
1334 | queue_event(client, &e->event, | |
e21fcf79 | 1335 | &e->iso_resource, sizeof(e->iso_resource), NULL, 0); |
b1bda4cd JFSR |
1336 | |
1337 | if (free) { | |
1338 | cancel_delayed_work(&r->work); | |
1339 | kfree(r->e_alloc); | |
1340 | kfree(r->e_dealloc); | |
1341 | kfree(r); | |
1342 | } | |
1343 | out: | |
1344 | client_put(client); | |
1345 | } | |
1346 | ||
b1bda4cd JFSR |
1347 | static void release_iso_resource(struct client *client, |
1348 | struct client_resource *resource) | |
1349 | { | |
1350 | struct iso_resource *r = | |
1351 | container_of(resource, struct iso_resource, resource); | |
1352 | ||
1353 | spin_lock_irq(&client->lock); | |
1354 | r->todo = ISO_RES_DEALLOC; | |
9fb551bf | 1355 | schedule_iso_resource(r, 0); |
b1bda4cd JFSR |
1356 | spin_unlock_irq(&client->lock); |
1357 | } | |
1358 | ||
1ec3c026 SR |
1359 | static int init_iso_resource(struct client *client, |
1360 | struct fw_cdev_allocate_iso_resource *request, int todo) | |
b1bda4cd | 1361 | { |
b1bda4cd JFSR |
1362 | struct iso_resource_event *e1, *e2; |
1363 | struct iso_resource *r; | |
1364 | int ret; | |
1365 | ||
1366 | if ((request->channels == 0 && request->bandwidth == 0) || | |
bdabfa54 | 1367 | request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL) |
b1bda4cd JFSR |
1368 | return -EINVAL; |
1369 | ||
1370 | r = kmalloc(sizeof(*r), GFP_KERNEL); | |
1371 | e1 = kmalloc(sizeof(*e1), GFP_KERNEL); | |
1372 | e2 = kmalloc(sizeof(*e2), GFP_KERNEL); | |
1373 | if (r == NULL || e1 == NULL || e2 == NULL) { | |
1374 | ret = -ENOMEM; | |
1375 | goto fail; | |
1376 | } | |
1377 | ||
1378 | INIT_DELAYED_WORK(&r->work, iso_resource_work); | |
1379 | r->client = client; | |
1ec3c026 | 1380 | r->todo = todo; |
b1bda4cd JFSR |
1381 | r->generation = -1; |
1382 | r->channels = request->channels; | |
1383 | r->bandwidth = request->bandwidth; | |
1384 | r->e_alloc = e1; | |
1385 | r->e_dealloc = e2; | |
1386 | ||
e21fcf79 SR |
1387 | e1->iso_resource.closure = request->closure; |
1388 | e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED; | |
1389 | e2->iso_resource.closure = request->closure; | |
1390 | e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED; | |
b1bda4cd | 1391 | |
1ec3c026 SR |
1392 | if (todo == ISO_RES_ALLOC) { |
1393 | r->resource.release = release_iso_resource; | |
1394 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
81610b8f SR |
1395 | if (ret < 0) |
1396 | goto fail; | |
1ec3c026 SR |
1397 | } else { |
1398 | r->resource.release = NULL; | |
1399 | r->resource.handle = -1; | |
9fb551bf | 1400 | schedule_iso_resource(r, 0); |
1ec3c026 | 1401 | } |
b1bda4cd JFSR |
1402 | request->handle = r->resource.handle; |
1403 | ||
1404 | return 0; | |
1405 | fail: | |
1406 | kfree(r); | |
1407 | kfree(e1); | |
1408 | kfree(e2); | |
1409 | ||
1410 | return ret; | |
1411 | } | |
1412 | ||
6e95dea7 SR |
1413 | static int ioctl_allocate_iso_resource(struct client *client, |
1414 | union ioctl_arg *arg) | |
1ec3c026 | 1415 | { |
6e95dea7 SR |
1416 | return init_iso_resource(client, |
1417 | &arg->allocate_iso_resource, ISO_RES_ALLOC); | |
1ec3c026 SR |
1418 | } |
1419 | ||
6e95dea7 SR |
1420 | static int ioctl_deallocate_iso_resource(struct client *client, |
1421 | union ioctl_arg *arg) | |
b1bda4cd | 1422 | { |
6e95dea7 SR |
1423 | return release_client_resource(client, |
1424 | arg->deallocate.handle, release_iso_resource, NULL); | |
b1bda4cd JFSR |
1425 | } |
1426 | ||
6e95dea7 SR |
1427 | static int ioctl_allocate_iso_resource_once(struct client *client, |
1428 | union ioctl_arg *arg) | |
1ec3c026 | 1429 | { |
6e95dea7 SR |
1430 | return init_iso_resource(client, |
1431 | &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE); | |
1ec3c026 SR |
1432 | } |
1433 | ||
6e95dea7 SR |
1434 | static int ioctl_deallocate_iso_resource_once(struct client *client, |
1435 | union ioctl_arg *arg) | |
1ec3c026 | 1436 | { |
6e95dea7 SR |
1437 | return init_iso_resource(client, |
1438 | &arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE); | |
1ec3c026 SR |
1439 | } |
1440 | ||
c8a25900 SR |
1441 | /* |
1442 | * Returns a speed code: Maximum speed to or from this device, | |
1443 | * limited by the device's link speed, the local node's link speed, | |
1444 | * and all PHY port speeds between the two links. | |
1445 | */ | |
6e95dea7 | 1446 | static int ioctl_get_speed(struct client *client, union ioctl_arg *arg) |
33580a3e | 1447 | { |
c8a25900 | 1448 | return client->device->max_speed; |
33580a3e SR |
1449 | } |
1450 | ||
6e95dea7 SR |
1451 | static int ioctl_send_broadcast_request(struct client *client, |
1452 | union ioctl_arg *arg) | |
acfe8333 | 1453 | { |
6e95dea7 | 1454 | struct fw_cdev_send_request *a = &arg->send_request; |
acfe8333 | 1455 | |
6e95dea7 | 1456 | switch (a->tcode) { |
acfe8333 JFSR |
1457 | case TCODE_WRITE_QUADLET_REQUEST: |
1458 | case TCODE_WRITE_BLOCK_REQUEST: | |
1459 | break; | |
1460 | default: | |
1461 | return -EINVAL; | |
1462 | } | |
1463 | ||
1566f3dc | 1464 | /* Security policy: Only allow accesses to Units Space. */ |
6e95dea7 | 1465 | if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END) |
1566f3dc SR |
1466 | return -EACCES; |
1467 | ||
6e95dea7 | 1468 | return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100); |
acfe8333 JFSR |
1469 | } |
1470 | ||
6e95dea7 | 1471 | static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg) |
f8c2287c | 1472 | { |
6e95dea7 | 1473 | struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet; |
18e9b10f SR |
1474 | struct fw_cdev_send_request request; |
1475 | int dest; | |
f8c2287c | 1476 | |
6e95dea7 SR |
1477 | if (a->speed > client->device->card->link_speed || |
1478 | a->length > 1024 << a->speed) | |
18e9b10f | 1479 | return -EIO; |
f8c2287c | 1480 | |
6e95dea7 | 1481 | if (a->tag > 3 || a->channel > 63 || a->sy > 15) |
18e9b10f SR |
1482 | return -EINVAL; |
1483 | ||
6e95dea7 | 1484 | dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy); |
18e9b10f | 1485 | request.tcode = TCODE_STREAM_DATA; |
6e95dea7 SR |
1486 | request.length = a->length; |
1487 | request.closure = a->closure; | |
1488 | request.data = a->data; | |
1489 | request.generation = a->generation; | |
18e9b10f | 1490 | |
6e95dea7 | 1491 | return init_request(client, &request, dest, a->speed); |
f8c2287c JF |
1492 | } |
1493 | ||
850bb6f2 SR |
1494 | static void outbound_phy_packet_callback(struct fw_packet *packet, |
1495 | struct fw_card *card, int status) | |
1496 | { | |
1497 | struct outbound_phy_packet_event *e = | |
1498 | container_of(packet, struct outbound_phy_packet_event, p); | |
1499 | ||
1500 | switch (status) { | |
1501 | /* expected: */ | |
1502 | case ACK_COMPLETE: e->phy_packet.rcode = RCODE_COMPLETE; break; | |
1503 | /* should never happen with PHY packets: */ | |
1504 | case ACK_PENDING: e->phy_packet.rcode = RCODE_COMPLETE; break; | |
1505 | case ACK_BUSY_X: | |
1506 | case ACK_BUSY_A: | |
1507 | case ACK_BUSY_B: e->phy_packet.rcode = RCODE_BUSY; break; | |
1508 | case ACK_DATA_ERROR: e->phy_packet.rcode = RCODE_DATA_ERROR; break; | |
1509 | case ACK_TYPE_ERROR: e->phy_packet.rcode = RCODE_TYPE_ERROR; break; | |
1510 | /* stale generation; cancelled; on certain controllers: no ack */ | |
1511 | default: e->phy_packet.rcode = status; break; | |
1512 | } | |
cc550216 | 1513 | e->phy_packet.data[0] = packet->timestamp; |
850bb6f2 | 1514 | |
cc550216 SR |
1515 | queue_event(e->client, &e->event, &e->phy_packet, |
1516 | sizeof(e->phy_packet) + e->phy_packet.length, NULL, 0); | |
850bb6f2 SR |
1517 | client_put(e->client); |
1518 | } | |
1519 | ||
1520 | static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg) | |
1521 | { | |
1522 | struct fw_cdev_send_phy_packet *a = &arg->send_phy_packet; | |
1523 | struct fw_card *card = client->device->card; | |
1524 | struct outbound_phy_packet_event *e; | |
1525 | ||
1526 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1527 | if (!client->device->is_local) | |
1528 | return -ENOSYS; | |
1529 | ||
cc550216 | 1530 | e = kzalloc(sizeof(*e) + 4, GFP_KERNEL); |
850bb6f2 SR |
1531 | if (e == NULL) |
1532 | return -ENOMEM; | |
1533 | ||
1534 | client_get(client); | |
1535 | e->client = client; | |
1536 | e->p.speed = SCODE_100; | |
1537 | e->p.generation = a->generation; | |
5b06db16 CL |
1538 | e->p.header[0] = TCODE_LINK_INTERNAL << 4; |
1539 | e->p.header[1] = a->data[0]; | |
1540 | e->p.header[2] = a->data[1]; | |
1541 | e->p.header_length = 12; | |
850bb6f2 SR |
1542 | e->p.callback = outbound_phy_packet_callback; |
1543 | e->phy_packet.closure = a->closure; | |
1544 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_SENT; | |
cc550216 SR |
1545 | if (is_ping_packet(a->data)) |
1546 | e->phy_packet.length = 4; | |
850bb6f2 SR |
1547 | |
1548 | card->driver->send_request(card, &e->p); | |
1549 | ||
1550 | return 0; | |
1551 | } | |
1552 | ||
bf54e146 SR |
1553 | static int ioctl_receive_phy_packets(struct client *client, union ioctl_arg *arg) |
1554 | { | |
1555 | struct fw_cdev_receive_phy_packets *a = &arg->receive_phy_packets; | |
1556 | struct fw_card *card = client->device->card; | |
1557 | ||
1558 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1559 | if (!client->device->is_local) | |
1560 | return -ENOSYS; | |
1561 | ||
1562 | spin_lock_irq(&card->lock); | |
1563 | ||
1564 | list_move_tail(&client->phy_receiver_link, &card->phy_receiver_list); | |
1565 | client->phy_receiver_closure = a->closure; | |
1566 | ||
1567 | spin_unlock_irq(&card->lock); | |
1568 | ||
1569 | return 0; | |
1570 | } | |
1571 | ||
1572 | void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p) | |
1573 | { | |
1574 | struct client *client; | |
1575 | struct inbound_phy_packet_event *e; | |
1576 | unsigned long flags; | |
1577 | ||
1578 | spin_lock_irqsave(&card->lock, flags); | |
1579 | ||
1580 | list_for_each_entry(client, &card->phy_receiver_list, phy_receiver_link) { | |
1581 | e = kmalloc(sizeof(*e) + 8, GFP_ATOMIC); | |
cfb0c9d1 | 1582 | if (e == NULL) |
bf54e146 | 1583 | break; |
cfb0c9d1 | 1584 | |
bf54e146 SR |
1585 | e->phy_packet.closure = client->phy_receiver_closure; |
1586 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_RECEIVED; | |
1587 | e->phy_packet.rcode = RCODE_COMPLETE; | |
1588 | e->phy_packet.length = 8; | |
1589 | e->phy_packet.data[0] = p->header[1]; | |
1590 | e->phy_packet.data[1] = p->header[2]; | |
1591 | queue_event(client, &e->event, | |
1592 | &e->phy_packet, sizeof(e->phy_packet) + 8, NULL, 0); | |
1593 | } | |
1594 | ||
1595 | spin_unlock_irqrestore(&card->lock, flags); | |
1596 | } | |
1597 | ||
6e95dea7 | 1598 | static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = { |
b9dc61cf SR |
1599 | [0x00] = ioctl_get_info, |
1600 | [0x01] = ioctl_send_request, | |
1601 | [0x02] = ioctl_allocate, | |
1602 | [0x03] = ioctl_deallocate, | |
1603 | [0x04] = ioctl_send_response, | |
1604 | [0x05] = ioctl_initiate_bus_reset, | |
1605 | [0x06] = ioctl_add_descriptor, | |
1606 | [0x07] = ioctl_remove_descriptor, | |
1607 | [0x08] = ioctl_create_iso_context, | |
1608 | [0x09] = ioctl_queue_iso, | |
1609 | [0x0a] = ioctl_start_iso, | |
1610 | [0x0b] = ioctl_stop_iso, | |
1611 | [0x0c] = ioctl_get_cycle_timer, | |
1612 | [0x0d] = ioctl_allocate_iso_resource, | |
1613 | [0x0e] = ioctl_deallocate_iso_resource, | |
1614 | [0x0f] = ioctl_allocate_iso_resource_once, | |
1615 | [0x10] = ioctl_deallocate_iso_resource_once, | |
1616 | [0x11] = ioctl_get_speed, | |
1617 | [0x12] = ioctl_send_broadcast_request, | |
1618 | [0x13] = ioctl_send_stream_packet, | |
1619 | [0x14] = ioctl_get_cycle_timer2, | |
850bb6f2 | 1620 | [0x15] = ioctl_send_phy_packet, |
bf54e146 | 1621 | [0x16] = ioctl_receive_phy_packets, |
872e330e | 1622 | [0x17] = ioctl_set_iso_channels, |
d1bbd209 | 1623 | [0x18] = ioctl_flush_iso, |
4f259223 KH |
1624 | }; |
1625 | ||
53dca511 SR |
1626 | static int dispatch_ioctl(struct client *client, |
1627 | unsigned int cmd, void __user *arg) | |
19a15b93 | 1628 | { |
6e95dea7 | 1629 | union ioctl_arg buffer; |
2dbd7d7e | 1630 | int ret; |
4f259223 | 1631 | |
64582298 SR |
1632 | if (fw_device_is_shutdown(client->device)) |
1633 | return -ENODEV; | |
1634 | ||
4f259223 | 1635 | if (_IOC_TYPE(cmd) != '#' || |
9cac00b8 SR |
1636 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) || |
1637 | _IOC_SIZE(cmd) > sizeof(buffer)) | |
d873d794 | 1638 | return -ENOTTY; |
4f259223 | 1639 | |
eaca2d8e | 1640 | memset(&buffer, 0, sizeof(buffer)); |
9cac00b8 SR |
1641 | |
1642 | if (_IOC_DIR(cmd) & _IOC_WRITE) | |
1643 | if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd))) | |
4f259223 | 1644 | return -EFAULT; |
4f259223 | 1645 | |
6e95dea7 | 1646 | ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer); |
2dbd7d7e SR |
1647 | if (ret < 0) |
1648 | return ret; | |
4f259223 | 1649 | |
9cac00b8 SR |
1650 | if (_IOC_DIR(cmd) & _IOC_READ) |
1651 | if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd))) | |
4f259223 | 1652 | return -EFAULT; |
4f259223 | 1653 | |
2dbd7d7e | 1654 | return ret; |
19a15b93 KH |
1655 | } |
1656 | ||
53dca511 SR |
1657 | static long fw_device_op_ioctl(struct file *file, |
1658 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1659 | { |
64582298 | 1660 | return dispatch_ioctl(file->private_data, cmd, (void __user *)arg); |
19a15b93 KH |
1661 | } |
1662 | ||
1663 | #ifdef CONFIG_COMPAT | |
53dca511 SR |
1664 | static long fw_device_op_compat_ioctl(struct file *file, |
1665 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1666 | { |
64582298 | 1667 | return dispatch_ioctl(file->private_data, cmd, compat_ptr(arg)); |
19a15b93 KH |
1668 | } |
1669 | #endif | |
1670 | ||
1671 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
1672 | { | |
1673 | struct client *client = file->private_data; | |
9aad8125 | 1674 | unsigned long size; |
2dbd7d7e | 1675 | int page_count, ret; |
9aad8125 | 1676 | |
551f4cb9 JF |
1677 | if (fw_device_is_shutdown(client->device)) |
1678 | return -ENODEV; | |
1679 | ||
9aad8125 KH |
1680 | /* FIXME: We could support multiple buffers, but we don't. */ |
1681 | if (client->buffer.pages != NULL) | |
1682 | return -EBUSY; | |
1683 | ||
1684 | if (!(vma->vm_flags & VM_SHARED)) | |
1685 | return -EINVAL; | |
19a15b93 | 1686 | |
9aad8125 | 1687 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
1688 | return -EINVAL; |
1689 | ||
1690 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
1691 | size = vma->vm_end - vma->vm_start; |
1692 | page_count = size >> PAGE_SHIFT; | |
1693 | if (size & ~PAGE_MASK) | |
1694 | return -EINVAL; | |
1695 | ||
0b6c4857 | 1696 | ret = fw_iso_buffer_alloc(&client->buffer, page_count); |
2dbd7d7e SR |
1697 | if (ret < 0) |
1698 | return ret; | |
19a15b93 | 1699 | |
0b6c4857 SR |
1700 | spin_lock_irq(&client->lock); |
1701 | if (client->iso_context) { | |
1702 | ret = fw_iso_buffer_map_dma(&client->buffer, | |
1703 | client->device->card, | |
1704 | iso_dma_direction(client->iso_context)); | |
1705 | client->buffer_is_mapped = (ret == 0); | |
1706 | } | |
1707 | spin_unlock_irq(&client->lock); | |
2dbd7d7e | 1708 | if (ret < 0) |
0b6c4857 | 1709 | goto fail; |
9aad8125 | 1710 | |
0b6c4857 SR |
1711 | ret = fw_iso_buffer_map_vma(&client->buffer, vma); |
1712 | if (ret < 0) | |
1713 | goto fail; | |
1714 | ||
1715 | return 0; | |
1716 | fail: | |
1717 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
2dbd7d7e | 1718 | return ret; |
19a15b93 KH |
1719 | } |
1720 | ||
5a5e62da CL |
1721 | static int is_outbound_transaction_resource(int id, void *p, void *data) |
1722 | { | |
1723 | struct client_resource *resource = p; | |
1724 | ||
1725 | return resource->release == release_transaction; | |
1726 | } | |
1727 | ||
1728 | static int has_outbound_transactions(struct client *client) | |
1729 | { | |
1730 | int ret; | |
1731 | ||
1732 | spin_lock_irq(&client->lock); | |
1733 | ret = idr_for_each(&client->resource_idr, | |
1734 | is_outbound_transaction_resource, NULL); | |
1735 | spin_unlock_irq(&client->lock); | |
1736 | ||
1737 | return ret; | |
1738 | } | |
1739 | ||
45ee3199 JF |
1740 | static int shutdown_resource(int id, void *p, void *data) |
1741 | { | |
e21fcf79 | 1742 | struct client_resource *resource = p; |
45ee3199 JF |
1743 | struct client *client = data; |
1744 | ||
e21fcf79 | 1745 | resource->release(client, resource); |
fb443036 | 1746 | client_put(client); |
45ee3199 JF |
1747 | |
1748 | return 0; | |
1749 | } | |
1750 | ||
19a15b93 KH |
1751 | static int fw_device_op_release(struct inode *inode, struct file *file) |
1752 | { | |
1753 | struct client *client = file->private_data; | |
e21fcf79 | 1754 | struct event *event, *next_event; |
19a15b93 | 1755 | |
bf54e146 SR |
1756 | spin_lock_irq(&client->device->card->lock); |
1757 | list_del(&client->phy_receiver_link); | |
1758 | spin_unlock_irq(&client->device->card->lock); | |
1759 | ||
97811e34 SR |
1760 | mutex_lock(&client->device->client_list_mutex); |
1761 | list_del(&client->link); | |
1762 | mutex_unlock(&client->device->client_list_mutex); | |
1763 | ||
19a15b93 KH |
1764 | if (client->iso_context) |
1765 | fw_iso_context_destroy(client->iso_context); | |
1766 | ||
36a755cf SR |
1767 | if (client->buffer.pages) |
1768 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
1769 | ||
45ee3199 | 1770 | /* Freeze client->resource_idr and client->event_list */ |
3ba94986 | 1771 | spin_lock_irq(&client->lock); |
45ee3199 | 1772 | client->in_shutdown = true; |
3ba94986 | 1773 | spin_unlock_irq(&client->lock); |
66dea3e5 | 1774 | |
5a5e62da CL |
1775 | wait_event(client->tx_flush_wait, !has_outbound_transactions(client)); |
1776 | ||
45ee3199 | 1777 | idr_for_each(&client->resource_idr, shutdown_resource, client); |
45ee3199 | 1778 | idr_destroy(&client->resource_idr); |
28cf6a04 | 1779 | |
e21fcf79 SR |
1780 | list_for_each_entry_safe(event, next_event, &client->event_list, link) |
1781 | kfree(event); | |
19a15b93 | 1782 | |
fb443036 | 1783 | client_put(client); |
19a15b93 KH |
1784 | |
1785 | return 0; | |
1786 | } | |
1787 | ||
1788 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
1789 | { | |
1790 | struct client *client = file->private_data; | |
2603bf21 | 1791 | unsigned int mask = 0; |
19a15b93 KH |
1792 | |
1793 | poll_wait(file, &client->wait, pt); | |
1794 | ||
2603bf21 KH |
1795 | if (fw_device_is_shutdown(client->device)) |
1796 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 1797 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
1798 | mask |= POLLIN | POLLRDNORM; |
1799 | ||
1800 | return mask; | |
19a15b93 KH |
1801 | } |
1802 | ||
21ebcd12 | 1803 | const struct file_operations fw_device_ops = { |
19a15b93 | 1804 | .owner = THIS_MODULE, |
3ac26b2e | 1805 | .llseek = no_llseek, |
19a15b93 KH |
1806 | .open = fw_device_op_open, |
1807 | .read = fw_device_op_read, | |
1808 | .unlocked_ioctl = fw_device_op_ioctl, | |
19a15b93 | 1809 | .mmap = fw_device_op_mmap, |
3ac26b2e SR |
1810 | .release = fw_device_op_release, |
1811 | .poll = fw_device_op_poll, | |
19a15b93 | 1812 | #ifdef CONFIG_COMPAT |
5af4e5ea | 1813 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
1814 | #endif |
1815 | }; |