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