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Commit | Line | Data |
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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; |
da8ecffa | 67 | u64 bus_reset_closure; |
9aad8125 | 68 | |
19a15b93 | 69 | struct fw_iso_context *iso_context; |
abaa5743 | 70 | u64 iso_closure; |
9aad8125 KH |
71 | struct fw_iso_buffer buffer; |
72 | unsigned long vm_start; | |
97bd9efa | 73 | |
bf54e146 SR |
74 | struct list_head phy_receiver_link; |
75 | u64 phy_receiver_closure; | |
76 | ||
97bd9efa | 77 | struct list_head link; |
fb443036 | 78 | struct kref kref; |
19a15b93 KH |
79 | }; |
80 | ||
fb443036 SR |
81 | static inline void client_get(struct client *client) |
82 | { | |
83 | kref_get(&client->kref); | |
84 | } | |
85 | ||
86 | static void client_release(struct kref *kref) | |
87 | { | |
88 | struct client *client = container_of(kref, struct client, kref); | |
89 | ||
90 | fw_device_put(client->device); | |
91 | kfree(client); | |
92 | } | |
93 | ||
94 | static void client_put(struct client *client) | |
95 | { | |
96 | kref_put(&client->kref, client_release); | |
97 | } | |
98 | ||
97c18b7f SR |
99 | struct client_resource; |
100 | typedef void (*client_resource_release_fn_t)(struct client *, | |
101 | struct client_resource *); | |
102 | struct client_resource { | |
103 | client_resource_release_fn_t release; | |
104 | int handle; | |
105 | }; | |
106 | ||
107 | struct address_handler_resource { | |
108 | struct client_resource resource; | |
109 | struct fw_address_handler handler; | |
110 | __u64 closure; | |
111 | struct client *client; | |
112 | }; | |
113 | ||
114 | struct outbound_transaction_resource { | |
115 | struct client_resource resource; | |
116 | struct fw_transaction transaction; | |
117 | }; | |
118 | ||
119 | struct inbound_transaction_resource { | |
120 | struct client_resource resource; | |
08bd34c9 | 121 | struct fw_card *card; |
97c18b7f SR |
122 | struct fw_request *request; |
123 | void *data; | |
124 | size_t length; | |
125 | }; | |
126 | ||
127 | struct descriptor_resource { | |
128 | struct client_resource resource; | |
129 | struct fw_descriptor descriptor; | |
130 | u32 data[0]; | |
131 | }; | |
132 | ||
b1bda4cd JFSR |
133 | struct iso_resource { |
134 | struct client_resource resource; | |
135 | struct client *client; | |
136 | /* Schedule work and access todo only with client->lock held. */ | |
137 | struct delayed_work work; | |
1ec3c026 SR |
138 | enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC, |
139 | ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo; | |
b1bda4cd JFSR |
140 | int generation; |
141 | u64 channels; | |
142 | s32 bandwidth; | |
6fdc0370 | 143 | __be32 transaction_data[2]; |
b1bda4cd JFSR |
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); | |
152 | if (!schedule_delayed_work(&r->work, delay)) | |
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); |
bf54e146 | 254 | INIT_LIST_HEAD(&client->phy_receiver_link); |
fb443036 | 255 | kref_init(&client->kref); |
19a15b93 KH |
256 | |
257 | file->private_data = client; | |
258 | ||
d67cfb96 | 259 | mutex_lock(&device->client_list_mutex); |
97bd9efa | 260 | list_add_tail(&client->link, &device->client_list); |
d67cfb96 | 261 | mutex_unlock(&device->client_list_mutex); |
97bd9efa | 262 | |
3ac26b2e | 263 | return nonseekable_open(inode, file); |
19a15b93 KH |
264 | } |
265 | ||
266 | static void queue_event(struct client *client, struct event *event, | |
267 | void *data0, size_t size0, void *data1, size_t size1) | |
268 | { | |
269 | unsigned long flags; | |
270 | ||
271 | event->v[0].data = data0; | |
272 | event->v[0].size = size0; | |
273 | event->v[1].data = data1; | |
274 | event->v[1].size = size1; | |
275 | ||
276 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
277 | if (client->in_shutdown) |
278 | kfree(event); | |
279 | else | |
280 | list_add_tail(&event->link, &client->event_list); | |
19a15b93 | 281 | spin_unlock_irqrestore(&client->lock, flags); |
83431cba JF |
282 | |
283 | wake_up_interruptible(&client->wait); | |
19a15b93 KH |
284 | } |
285 | ||
53dca511 SR |
286 | static int dequeue_event(struct client *client, |
287 | char __user *buffer, size_t count) | |
19a15b93 | 288 | { |
19a15b93 KH |
289 | struct event *event; |
290 | size_t size, total; | |
2dbd7d7e | 291 | int i, ret; |
19a15b93 | 292 | |
2dbd7d7e SR |
293 | ret = wait_event_interruptible(client->wait, |
294 | !list_empty(&client->event_list) || | |
295 | fw_device_is_shutdown(client->device)); | |
296 | if (ret < 0) | |
297 | return ret; | |
19a15b93 | 298 | |
2603bf21 KH |
299 | if (list_empty(&client->event_list) && |
300 | fw_device_is_shutdown(client->device)) | |
301 | return -ENODEV; | |
19a15b93 | 302 | |
3ba94986 | 303 | spin_lock_irq(&client->lock); |
a459b8ab | 304 | event = list_first_entry(&client->event_list, struct event, link); |
19a15b93 | 305 | list_del(&event->link); |
3ba94986 | 306 | spin_unlock_irq(&client->lock); |
19a15b93 | 307 | |
19a15b93 KH |
308 | total = 0; |
309 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
310 | size = min(event->v[i].size, count - total); | |
2603bf21 | 311 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
2dbd7d7e | 312 | ret = -EFAULT; |
19a15b93 | 313 | goto out; |
2603bf21 | 314 | } |
19a15b93 KH |
315 | total += size; |
316 | } | |
2dbd7d7e | 317 | ret = total; |
19a15b93 KH |
318 | |
319 | out: | |
320 | kfree(event); | |
321 | ||
2dbd7d7e | 322 | return ret; |
19a15b93 KH |
323 | } |
324 | ||
53dca511 SR |
325 | static ssize_t fw_device_op_read(struct file *file, char __user *buffer, |
326 | size_t count, loff_t *offset) | |
19a15b93 KH |
327 | { |
328 | struct client *client = file->private_data; | |
329 | ||
330 | return dequeue_event(client, buffer, count); | |
331 | } | |
332 | ||
53dca511 SR |
333 | static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, |
334 | struct client *client) | |
344bbc4d | 335 | { |
da8ecffa | 336 | struct fw_card *card = client->device->card; |
cf417e54 | 337 | |
3ba94986 | 338 | spin_lock_irq(&card->lock); |
344bbc4d | 339 | |
da8ecffa | 340 | event->closure = client->bus_reset_closure; |
344bbc4d | 341 | event->type = FW_CDEV_EVENT_BUS_RESET; |
cf5a56ac | 342 | event->generation = client->device->generation; |
da8ecffa | 343 | event->node_id = client->device->node_id; |
344bbc4d | 344 | event->local_node_id = card->local_node->node_id; |
250b2b6d | 345 | event->bm_node_id = card->bm_node_id; |
344bbc4d KH |
346 | event->irm_node_id = card->irm_node->node_id; |
347 | event->root_node_id = card->root_node->node_id; | |
cf417e54 | 348 | |
3ba94986 | 349 | spin_unlock_irq(&card->lock); |
344bbc4d KH |
350 | } |
351 | ||
53dca511 SR |
352 | static void for_each_client(struct fw_device *device, |
353 | void (*callback)(struct client *client)) | |
2603bf21 | 354 | { |
2603bf21 | 355 | struct client *c; |
2603bf21 | 356 | |
d67cfb96 | 357 | mutex_lock(&device->client_list_mutex); |
2603bf21 KH |
358 | list_for_each_entry(c, &device->client_list, link) |
359 | callback(c); | |
d67cfb96 | 360 | mutex_unlock(&device->client_list_mutex); |
2603bf21 KH |
361 | } |
362 | ||
b1bda4cd JFSR |
363 | static int schedule_reallocations(int id, void *p, void *data) |
364 | { | |
9fb551bf | 365 | schedule_if_iso_resource(p); |
b1bda4cd | 366 | |
b1bda4cd JFSR |
367 | return 0; |
368 | } | |
369 | ||
53dca511 | 370 | static void queue_bus_reset_event(struct client *client) |
97bd9efa | 371 | { |
97c18b7f | 372 | struct bus_reset_event *e; |
97bd9efa | 373 | |
97c18b7f SR |
374 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
375 | if (e == NULL) { | |
bf54e146 | 376 | fw_notify("Out of memory when allocating event\n"); |
97bd9efa KH |
377 | return; |
378 | } | |
379 | ||
97c18b7f | 380 | fill_bus_reset_event(&e->reset, client); |
97bd9efa | 381 | |
97c18b7f SR |
382 | queue_event(client, &e->event, |
383 | &e->reset, sizeof(e->reset), NULL, 0); | |
b1bda4cd JFSR |
384 | |
385 | spin_lock_irq(&client->lock); | |
386 | idr_for_each(&client->resource_idr, schedule_reallocations, client); | |
387 | spin_unlock_irq(&client->lock); | |
97bd9efa KH |
388 | } |
389 | ||
390 | void fw_device_cdev_update(struct fw_device *device) | |
391 | { | |
2603bf21 KH |
392 | for_each_client(device, queue_bus_reset_event); |
393 | } | |
97bd9efa | 394 | |
2603bf21 KH |
395 | static void wake_up_client(struct client *client) |
396 | { | |
397 | wake_up_interruptible(&client->wait); | |
398 | } | |
97bd9efa | 399 | |
2603bf21 KH |
400 | void fw_device_cdev_remove(struct fw_device *device) |
401 | { | |
402 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
403 | } |
404 | ||
6e95dea7 SR |
405 | union ioctl_arg { |
406 | struct fw_cdev_get_info get_info; | |
407 | struct fw_cdev_send_request send_request; | |
408 | struct fw_cdev_allocate allocate; | |
409 | struct fw_cdev_deallocate deallocate; | |
410 | struct fw_cdev_send_response send_response; | |
411 | struct fw_cdev_initiate_bus_reset initiate_bus_reset; | |
412 | struct fw_cdev_add_descriptor add_descriptor; | |
413 | struct fw_cdev_remove_descriptor remove_descriptor; | |
414 | struct fw_cdev_create_iso_context create_iso_context; | |
415 | struct fw_cdev_queue_iso queue_iso; | |
416 | struct fw_cdev_start_iso start_iso; | |
417 | struct fw_cdev_stop_iso stop_iso; | |
418 | struct fw_cdev_get_cycle_timer get_cycle_timer; | |
419 | struct fw_cdev_allocate_iso_resource allocate_iso_resource; | |
420 | struct fw_cdev_send_stream_packet send_stream_packet; | |
421 | struct fw_cdev_get_cycle_timer2 get_cycle_timer2; | |
850bb6f2 | 422 | struct fw_cdev_send_phy_packet send_phy_packet; |
bf54e146 | 423 | struct fw_cdev_receive_phy_packets receive_phy_packets; |
872e330e | 424 | struct fw_cdev_set_iso_channels set_iso_channels; |
6e95dea7 SR |
425 | }; |
426 | ||
427 | static int ioctl_get_info(struct client *client, union ioctl_arg *arg) | |
19a15b93 | 428 | { |
6e95dea7 | 429 | struct fw_cdev_get_info *a = &arg->get_info; |
344bbc4d | 430 | struct fw_cdev_event_bus_reset bus_reset; |
c9755e14 | 431 | unsigned long ret = 0; |
344bbc4d | 432 | |
6e95dea7 | 433 | client->version = a->version; |
604f4516 | 434 | a->version = FW_CDEV_KERNEL_VERSION; |
6e95dea7 | 435 | a->card = client->device->card->index; |
344bbc4d | 436 | |
c9755e14 SR |
437 | down_read(&fw_device_rwsem); |
438 | ||
6e95dea7 SR |
439 | if (a->rom != 0) { |
440 | size_t want = a->rom_length; | |
d84702a5 | 441 | size_t have = client->device->config_rom_length * 4; |
344bbc4d | 442 | |
6e95dea7 SR |
443 | ret = copy_to_user(u64_to_uptr(a->rom), |
444 | client->device->config_rom, min(want, have)); | |
344bbc4d | 445 | } |
6e95dea7 | 446 | a->rom_length = client->device->config_rom_length * 4; |
344bbc4d | 447 | |
c9755e14 SR |
448 | up_read(&fw_device_rwsem); |
449 | ||
450 | if (ret != 0) | |
451 | return -EFAULT; | |
452 | ||
6e95dea7 SR |
453 | client->bus_reset_closure = a->bus_reset_closure; |
454 | if (a->bus_reset != 0) { | |
da8ecffa | 455 | fill_bus_reset_event(&bus_reset, client); |
6e95dea7 SR |
456 | if (copy_to_user(u64_to_uptr(a->bus_reset), |
457 | &bus_reset, sizeof(bus_reset))) | |
344bbc4d KH |
458 | return -EFAULT; |
459 | } | |
19a15b93 | 460 | |
19a15b93 KH |
461 | return 0; |
462 | } | |
463 | ||
53dca511 SR |
464 | static int add_client_resource(struct client *client, |
465 | struct client_resource *resource, gfp_t gfp_mask) | |
3964a449 KH |
466 | { |
467 | unsigned long flags; | |
45ee3199 JF |
468 | int ret; |
469 | ||
470 | retry: | |
471 | if (idr_pre_get(&client->resource_idr, gfp_mask) == 0) | |
472 | return -ENOMEM; | |
3964a449 KH |
473 | |
474 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
475 | if (client->in_shutdown) |
476 | ret = -ECANCELED; | |
477 | else | |
478 | ret = idr_get_new(&client->resource_idr, resource, | |
479 | &resource->handle); | |
b1bda4cd | 480 | if (ret >= 0) { |
fb443036 | 481 | client_get(client); |
9fb551bf | 482 | schedule_if_iso_resource(resource); |
b1bda4cd | 483 | } |
3964a449 | 484 | spin_unlock_irqrestore(&client->lock, flags); |
45ee3199 JF |
485 | |
486 | if (ret == -EAGAIN) | |
487 | goto retry; | |
488 | ||
489 | return ret < 0 ? ret : 0; | |
3964a449 KH |
490 | } |
491 | ||
53dca511 SR |
492 | static int release_client_resource(struct client *client, u32 handle, |
493 | client_resource_release_fn_t release, | |
e21fcf79 | 494 | struct client_resource **return_resource) |
3964a449 | 495 | { |
e21fcf79 | 496 | struct client_resource *resource; |
3964a449 | 497 | |
3ba94986 | 498 | spin_lock_irq(&client->lock); |
45ee3199 | 499 | if (client->in_shutdown) |
e21fcf79 | 500 | resource = NULL; |
45ee3199 | 501 | else |
e21fcf79 SR |
502 | resource = idr_find(&client->resource_idr, handle); |
503 | if (resource && resource->release == release) | |
45ee3199 | 504 | idr_remove(&client->resource_idr, handle); |
3ba94986 | 505 | spin_unlock_irq(&client->lock); |
3964a449 | 506 | |
e21fcf79 | 507 | if (!(resource && resource->release == release)) |
3964a449 KH |
508 | return -EINVAL; |
509 | ||
e21fcf79 SR |
510 | if (return_resource) |
511 | *return_resource = resource; | |
3964a449 | 512 | else |
e21fcf79 | 513 | resource->release(client, resource); |
3964a449 | 514 | |
fb443036 SR |
515 | client_put(client); |
516 | ||
3964a449 KH |
517 | return 0; |
518 | } | |
519 | ||
53dca511 SR |
520 | static void release_transaction(struct client *client, |
521 | struct client_resource *resource) | |
3964a449 | 522 | { |
97c18b7f SR |
523 | struct outbound_transaction_resource *r = container_of(resource, |
524 | struct outbound_transaction_resource, resource); | |
3964a449 | 525 | |
97c18b7f | 526 | fw_cancel_transaction(client->device->card, &r->transaction); |
3964a449 KH |
527 | } |
528 | ||
53dca511 SR |
529 | static void complete_transaction(struct fw_card *card, int rcode, |
530 | void *payload, size_t length, void *data) | |
19a15b93 | 531 | { |
97c18b7f SR |
532 | struct outbound_transaction_event *e = data; |
533 | struct fw_cdev_event_response *rsp = &e->response; | |
534 | struct client *client = e->client; | |
28cf6a04 | 535 | unsigned long flags; |
19a15b93 | 536 | |
97c18b7f SR |
537 | if (length < rsp->length) |
538 | rsp->length = length; | |
19a15b93 | 539 | if (rcode == RCODE_COMPLETE) |
97c18b7f | 540 | memcpy(rsp->data, payload, rsp->length); |
19a15b93 | 541 | |
28cf6a04 | 542 | spin_lock_irqsave(&client->lock, flags); |
45ee3199 | 543 | /* |
fb443036 SR |
544 | * 1. If called while in shutdown, the idr tree must be left untouched. |
545 | * The idr handle will be removed and the client reference will be | |
546 | * dropped later. | |
45ee3199 | 547 | */ |
3e204dfc | 548 | if (!client->in_shutdown) { |
97c18b7f | 549 | idr_remove(&client->resource_idr, e->r.resource.handle); |
fb443036 SR |
550 | /* Drop the idr's reference */ |
551 | client_put(client); | |
552 | } | |
28cf6a04 KH |
553 | spin_unlock_irqrestore(&client->lock, flags); |
554 | ||
97c18b7f SR |
555 | rsp->type = FW_CDEV_EVENT_RESPONSE; |
556 | rsp->rcode = rcode; | |
8401d92b DM |
557 | |
558 | /* | |
97c18b7f | 559 | * In the case that sizeof(*rsp) doesn't align with the position of the |
8401d92b DM |
560 | * data, and the read is short, preserve an extra copy of the data |
561 | * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless | |
562 | * for short reads and some apps depended on it, this is both safe | |
563 | * and prudent for compatibility. | |
564 | */ | |
97c18b7f SR |
565 | if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data)) |
566 | queue_event(client, &e->event, rsp, sizeof(*rsp), | |
567 | rsp->data, rsp->length); | |
8401d92b | 568 | else |
97c18b7f | 569 | queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length, |
8401d92b | 570 | NULL, 0); |
fb443036 SR |
571 | |
572 | /* Drop the transaction callback's reference */ | |
573 | client_put(client); | |
19a15b93 KH |
574 | } |
575 | ||
acfe8333 JFSR |
576 | static int init_request(struct client *client, |
577 | struct fw_cdev_send_request *request, | |
578 | int destination_id, int speed) | |
19a15b93 | 579 | { |
97c18b7f | 580 | struct outbound_transaction_event *e; |
1f3125af | 581 | int ret; |
19a15b93 | 582 | |
18e9b10f SR |
583 | if (request->tcode != TCODE_STREAM_DATA && |
584 | (request->length > 4096 || request->length > 512 << speed)) | |
5d3fd692 | 585 | return -EIO; |
19a15b93 | 586 | |
a8e93f3d CL |
587 | if (request->tcode == TCODE_WRITE_QUADLET_REQUEST && |
588 | request->length < 4) | |
589 | return -EINVAL; | |
590 | ||
97c18b7f SR |
591 | e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL); |
592 | if (e == NULL) | |
19a15b93 KH |
593 | return -ENOMEM; |
594 | ||
97c18b7f SR |
595 | e->client = client; |
596 | e->response.length = request->length; | |
597 | e->response.closure = request->closure; | |
19a15b93 | 598 | |
4f259223 | 599 | if (request->data && |
97c18b7f | 600 | copy_from_user(e->response.data, |
4f259223 | 601 | u64_to_uptr(request->data), request->length)) { |
1f3125af | 602 | ret = -EFAULT; |
45ee3199 | 603 | goto failed; |
1f3125af SR |
604 | } |
605 | ||
97c18b7f SR |
606 | e->r.resource.release = release_transaction; |
607 | ret = add_client_resource(client, &e->r.resource, GFP_KERNEL); | |
45ee3199 JF |
608 | if (ret < 0) |
609 | goto failed; | |
28cf6a04 | 610 | |
fb443036 SR |
611 | /* Get a reference for the transaction callback */ |
612 | client_get(client); | |
613 | ||
acfe8333 | 614 | fw_send_request(client->device->card, &e->r.transaction, |
664d8010 SR |
615 | request->tcode, destination_id, request->generation, |
616 | speed, request->offset, e->response.data, | |
617 | request->length, complete_transaction, e); | |
618 | return 0; | |
19a15b93 | 619 | |
45ee3199 | 620 | failed: |
97c18b7f | 621 | kfree(e); |
1f3125af SR |
622 | |
623 | return ret; | |
19a15b93 KH |
624 | } |
625 | ||
6e95dea7 | 626 | static int ioctl_send_request(struct client *client, union ioctl_arg *arg) |
acfe8333 | 627 | { |
6e95dea7 | 628 | switch (arg->send_request.tcode) { |
acfe8333 JFSR |
629 | case TCODE_WRITE_QUADLET_REQUEST: |
630 | case TCODE_WRITE_BLOCK_REQUEST: | |
631 | case TCODE_READ_QUADLET_REQUEST: | |
632 | case TCODE_READ_BLOCK_REQUEST: | |
633 | case TCODE_LOCK_MASK_SWAP: | |
634 | case TCODE_LOCK_COMPARE_SWAP: | |
635 | case TCODE_LOCK_FETCH_ADD: | |
636 | case TCODE_LOCK_LITTLE_ADD: | |
637 | case TCODE_LOCK_BOUNDED_ADD: | |
638 | case TCODE_LOCK_WRAP_ADD: | |
639 | case TCODE_LOCK_VENDOR_DEPENDENT: | |
640 | break; | |
641 | default: | |
642 | return -EINVAL; | |
643 | } | |
644 | ||
6e95dea7 | 645 | return init_request(client, &arg->send_request, client->device->node_id, |
acfe8333 JFSR |
646 | client->device->max_speed); |
647 | } | |
648 | ||
281e2032 SR |
649 | static inline bool is_fcp_request(struct fw_request *request) |
650 | { | |
651 | return request == NULL; | |
652 | } | |
653 | ||
53dca511 SR |
654 | static void release_request(struct client *client, |
655 | struct client_resource *resource) | |
3964a449 | 656 | { |
97c18b7f SR |
657 | struct inbound_transaction_resource *r = container_of(resource, |
658 | struct inbound_transaction_resource, resource); | |
3964a449 | 659 | |
281e2032 SR |
660 | if (is_fcp_request(r->request)) |
661 | kfree(r->data); | |
662 | else | |
08bd34c9 | 663 | fw_send_response(r->card, r->request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
664 | |
665 | fw_card_put(r->card); | |
97c18b7f | 666 | kfree(r); |
3964a449 KH |
667 | } |
668 | ||
97c18b7f | 669 | static void handle_request(struct fw_card *card, struct fw_request *request, |
53dca511 | 670 | int tcode, int destination, int source, |
33e553fe | 671 | int generation, unsigned long long offset, |
53dca511 | 672 | void *payload, size_t length, void *callback_data) |
19a15b93 | 673 | { |
97c18b7f SR |
674 | struct address_handler_resource *handler = callback_data; |
675 | struct inbound_transaction_resource *r; | |
676 | struct inbound_transaction_event *e; | |
e205597d | 677 | size_t event_size0; |
281e2032 | 678 | void *fcp_frame = NULL; |
45ee3199 | 679 | int ret; |
19a15b93 | 680 | |
0244f573 SR |
681 | /* card may be different from handler->client->device->card */ |
682 | fw_card_get(card); | |
683 | ||
97c18b7f | 684 | r = kmalloc(sizeof(*r), GFP_ATOMIC); |
2d826cc5 | 685 | e = kmalloc(sizeof(*e), GFP_ATOMIC); |
bf54e146 SR |
686 | if (r == NULL || e == NULL) { |
687 | fw_notify("Out of memory when allocating event\n"); | |
45ee3199 | 688 | goto failed; |
bf54e146 | 689 | } |
08bd34c9 | 690 | r->card = card; |
97c18b7f SR |
691 | r->request = request; |
692 | r->data = payload; | |
693 | r->length = length; | |
19a15b93 | 694 | |
281e2032 SR |
695 | if (is_fcp_request(request)) { |
696 | /* | |
697 | * FIXME: Let core-transaction.c manage a | |
698 | * single reference-counted copy? | |
699 | */ | |
700 | fcp_frame = kmemdup(payload, length, GFP_ATOMIC); | |
701 | if (fcp_frame == NULL) | |
702 | goto failed; | |
703 | ||
704 | r->data = fcp_frame; | |
705 | } | |
706 | ||
97c18b7f SR |
707 | r->resource.release = release_request; |
708 | ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC); | |
45ee3199 JF |
709 | if (ret < 0) |
710 | goto failed; | |
19a15b93 | 711 | |
e205597d SR |
712 | if (handler->client->version < FW_CDEV_VERSION_EVENT_REQUEST2) { |
713 | struct fw_cdev_event_request *req = &e->req.request; | |
714 | ||
715 | if (tcode & 0x10) | |
716 | tcode = TCODE_LOCK_REQUEST; | |
717 | ||
718 | req->type = FW_CDEV_EVENT_REQUEST; | |
719 | req->tcode = tcode; | |
720 | req->offset = offset; | |
721 | req->length = length; | |
722 | req->handle = r->resource.handle; | |
723 | req->closure = handler->closure; | |
724 | event_size0 = sizeof(*req); | |
725 | } else { | |
726 | struct fw_cdev_event_request2 *req = &e->req.request2; | |
727 | ||
728 | req->type = FW_CDEV_EVENT_REQUEST2; | |
729 | req->tcode = tcode; | |
730 | req->offset = offset; | |
731 | req->source_node_id = source; | |
732 | req->destination_node_id = destination; | |
733 | req->card = card->index; | |
734 | req->generation = generation; | |
735 | req->length = length; | |
736 | req->handle = r->resource.handle; | |
737 | req->closure = handler->closure; | |
738 | event_size0 = sizeof(*req); | |
739 | } | |
19a15b93 | 740 | |
97c18b7f | 741 | queue_event(handler->client, &e->event, |
e205597d | 742 | &e->req, event_size0, r->data, length); |
45ee3199 JF |
743 | return; |
744 | ||
745 | failed: | |
97c18b7f | 746 | kfree(r); |
45ee3199 | 747 | kfree(e); |
281e2032 SR |
748 | kfree(fcp_frame); |
749 | ||
750 | if (!is_fcp_request(request)) | |
db5d247a | 751 | fw_send_response(card, request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
752 | |
753 | fw_card_put(card); | |
19a15b93 KH |
754 | } |
755 | ||
53dca511 SR |
756 | static void release_address_handler(struct client *client, |
757 | struct client_resource *resource) | |
3964a449 | 758 | { |
97c18b7f SR |
759 | struct address_handler_resource *r = |
760 | container_of(resource, struct address_handler_resource, resource); | |
3964a449 | 761 | |
97c18b7f SR |
762 | fw_core_remove_address_handler(&r->handler); |
763 | kfree(r); | |
3964a449 KH |
764 | } |
765 | ||
6e95dea7 | 766 | static int ioctl_allocate(struct client *client, union ioctl_arg *arg) |
19a15b93 | 767 | { |
6e95dea7 | 768 | struct fw_cdev_allocate *a = &arg->allocate; |
97c18b7f | 769 | struct address_handler_resource *r; |
19a15b93 | 770 | struct fw_address_region region; |
45ee3199 | 771 | int ret; |
19a15b93 | 772 | |
97c18b7f SR |
773 | r = kmalloc(sizeof(*r), GFP_KERNEL); |
774 | if (r == NULL) | |
19a15b93 KH |
775 | return -ENOMEM; |
776 | ||
6e95dea7 | 777 | region.start = a->offset; |
8e2b2b46 SR |
778 | if (client->version < FW_CDEV_VERSION_ALLOCATE_REGION_END) |
779 | region.end = a->offset + a->length; | |
780 | else | |
781 | region.end = a->region_end; | |
782 | ||
6e95dea7 | 783 | r->handler.length = a->length; |
97c18b7f | 784 | r->handler.address_callback = handle_request; |
6e95dea7 SR |
785 | r->handler.callback_data = r; |
786 | r->closure = a->closure; | |
787 | r->client = client; | |
19a15b93 | 788 | |
97c18b7f | 789 | ret = fw_core_add_address_handler(&r->handler, ®ion); |
3e0b5f0d | 790 | if (ret < 0) { |
97c18b7f | 791 | kfree(r); |
3e0b5f0d | 792 | return ret; |
19a15b93 | 793 | } |
8e2b2b46 | 794 | a->offset = r->handler.offset; |
19a15b93 | 795 | |
97c18b7f SR |
796 | r->resource.release = release_address_handler; |
797 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 798 | if (ret < 0) { |
97c18b7f | 799 | release_address_handler(client, &r->resource); |
45ee3199 JF |
800 | return ret; |
801 | } | |
6e95dea7 | 802 | a->handle = r->resource.handle; |
19a15b93 KH |
803 | |
804 | return 0; | |
805 | } | |
806 | ||
6e95dea7 | 807 | static int ioctl_deallocate(struct client *client, union ioctl_arg *arg) |
9472316b | 808 | { |
6e95dea7 | 809 | return release_client_resource(client, arg->deallocate.handle, |
45ee3199 | 810 | release_address_handler, NULL); |
9472316b KH |
811 | } |
812 | ||
6e95dea7 | 813 | static int ioctl_send_response(struct client *client, union ioctl_arg *arg) |
19a15b93 | 814 | { |
6e95dea7 | 815 | struct fw_cdev_send_response *a = &arg->send_response; |
3964a449 | 816 | struct client_resource *resource; |
97c18b7f | 817 | struct inbound_transaction_resource *r; |
7e44c0b5 | 818 | int ret = 0; |
19a15b93 | 819 | |
6e95dea7 | 820 | if (release_client_resource(client, a->handle, |
45ee3199 | 821 | release_request, &resource) < 0) |
19a15b93 | 822 | return -EINVAL; |
45ee3199 | 823 | |
97c18b7f SR |
824 | r = container_of(resource, struct inbound_transaction_resource, |
825 | resource); | |
281e2032 SR |
826 | if (is_fcp_request(r->request)) |
827 | goto out; | |
828 | ||
a10c0ce7 CL |
829 | if (a->length != fw_get_response_length(r->request)) { |
830 | ret = -EINVAL; | |
831 | kfree(r->request); | |
832 | goto out; | |
833 | } | |
834 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length)) { | |
281e2032 SR |
835 | ret = -EFAULT; |
836 | kfree(r->request); | |
837 | goto out; | |
7e44c0b5 | 838 | } |
08bd34c9 | 839 | fw_send_response(r->card, r->request, a->rcode); |
7e44c0b5 | 840 | out: |
0244f573 | 841 | fw_card_put(r->card); |
19a15b93 KH |
842 | kfree(r); |
843 | ||
7e44c0b5 | 844 | return ret; |
19a15b93 KH |
845 | } |
846 | ||
6e95dea7 | 847 | static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg) |
5371842b | 848 | { |
02d37bed | 849 | fw_schedule_bus_reset(client->device->card, true, |
6e95dea7 | 850 | arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET); |
02d37bed | 851 | return 0; |
5371842b KH |
852 | } |
853 | ||
3964a449 KH |
854 | static void release_descriptor(struct client *client, |
855 | struct client_resource *resource) | |
856 | { | |
97c18b7f SR |
857 | struct descriptor_resource *r = |
858 | container_of(resource, struct descriptor_resource, resource); | |
3964a449 | 859 | |
97c18b7f SR |
860 | fw_core_remove_descriptor(&r->descriptor); |
861 | kfree(r); | |
3964a449 KH |
862 | } |
863 | ||
6e95dea7 | 864 | static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 865 | { |
6e95dea7 | 866 | struct fw_cdev_add_descriptor *a = &arg->add_descriptor; |
97c18b7f | 867 | struct descriptor_resource *r; |
45ee3199 | 868 | int ret; |
66dea3e5 | 869 | |
de487da8 | 870 | /* Access policy: Allow this ioctl only on local nodes' device files. */ |
92368890 | 871 | if (!client->device->is_local) |
de487da8 SR |
872 | return -ENOSYS; |
873 | ||
6e95dea7 | 874 | if (a->length > 256) |
66dea3e5 KH |
875 | return -EINVAL; |
876 | ||
6e95dea7 | 877 | r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL); |
97c18b7f | 878 | if (r == NULL) |
66dea3e5 KH |
879 | return -ENOMEM; |
880 | ||
6e95dea7 | 881 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) { |
45ee3199 JF |
882 | ret = -EFAULT; |
883 | goto failed; | |
66dea3e5 KH |
884 | } |
885 | ||
6e95dea7 SR |
886 | r->descriptor.length = a->length; |
887 | r->descriptor.immediate = a->immediate; | |
888 | r->descriptor.key = a->key; | |
97c18b7f | 889 | r->descriptor.data = r->data; |
66dea3e5 | 890 | |
97c18b7f | 891 | ret = fw_core_add_descriptor(&r->descriptor); |
45ee3199 JF |
892 | if (ret < 0) |
893 | goto failed; | |
66dea3e5 | 894 | |
97c18b7f SR |
895 | r->resource.release = release_descriptor; |
896 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 897 | if (ret < 0) { |
97c18b7f | 898 | fw_core_remove_descriptor(&r->descriptor); |
45ee3199 JF |
899 | goto failed; |
900 | } | |
6e95dea7 | 901 | a->handle = r->resource.handle; |
66dea3e5 KH |
902 | |
903 | return 0; | |
45ee3199 | 904 | failed: |
97c18b7f | 905 | kfree(r); |
45ee3199 JF |
906 | |
907 | return ret; | |
66dea3e5 KH |
908 | } |
909 | ||
6e95dea7 | 910 | static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 911 | { |
6e95dea7 | 912 | return release_client_resource(client, arg->remove_descriptor.handle, |
45ee3199 | 913 | release_descriptor, NULL); |
66dea3e5 KH |
914 | } |
915 | ||
53dca511 SR |
916 | static void iso_callback(struct fw_iso_context *context, u32 cycle, |
917 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
918 | { |
919 | struct client *client = data; | |
97c18b7f | 920 | struct iso_interrupt_event *e; |
19a15b93 | 921 | |
56d04cb1 | 922 | e = kmalloc(sizeof(*e) + header_length, GFP_ATOMIC); |
bf54e146 SR |
923 | if (e == NULL) { |
924 | fw_notify("Out of memory when allocating event\n"); | |
19a15b93 | 925 | return; |
bf54e146 | 926 | } |
97c18b7f SR |
927 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
928 | e->interrupt.closure = client->iso_closure; | |
929 | e->interrupt.cycle = cycle; | |
930 | e->interrupt.header_length = header_length; | |
931 | memcpy(e->interrupt.header, header, header_length); | |
932 | queue_event(client, &e->event, &e->interrupt, | |
933 | sizeof(e->interrupt) + header_length, NULL, 0); | |
19a15b93 KH |
934 | } |
935 | ||
872e330e SR |
936 | static void iso_mc_callback(struct fw_iso_context *context, |
937 | dma_addr_t completed, void *data) | |
938 | { | |
939 | struct client *client = data; | |
940 | struct iso_interrupt_mc_event *e; | |
941 | ||
942 | e = kmalloc(sizeof(*e), GFP_ATOMIC); | |
943 | if (e == NULL) { | |
944 | fw_notify("Out of memory when allocating event\n"); | |
945 | return; | |
946 | } | |
947 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL; | |
948 | e->interrupt.closure = client->iso_closure; | |
949 | e->interrupt.completed = fw_iso_buffer_lookup(&client->buffer, | |
950 | completed); | |
951 | queue_event(client, &e->event, &e->interrupt, | |
952 | sizeof(e->interrupt), NULL, 0); | |
953 | } | |
954 | ||
6e95dea7 | 955 | static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) |
19a15b93 | 956 | { |
6e95dea7 | 957 | struct fw_cdev_create_iso_context *a = &arg->create_iso_context; |
24315c5e | 958 | struct fw_iso_context *context; |
872e330e | 959 | fw_iso_callback_t cb; |
19a15b93 | 960 | |
eb5b35a5 | 961 | BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT != FW_ISO_CONTEXT_TRANSMIT || |
872e330e SR |
962 | FW_CDEV_ISO_CONTEXT_RECEIVE != FW_ISO_CONTEXT_RECEIVE || |
963 | FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL != | |
964 | FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL); | |
21efb3cf | 965 | |
6e95dea7 | 966 | switch (a->type) { |
872e330e SR |
967 | case FW_ISO_CONTEXT_TRANSMIT: |
968 | if (a->speed > SCODE_3200 || a->channel > 63) | |
c70dc788 | 969 | return -EINVAL; |
872e330e SR |
970 | |
971 | cb = iso_callback; | |
c70dc788 KH |
972 | break; |
973 | ||
872e330e SR |
974 | case FW_ISO_CONTEXT_RECEIVE: |
975 | if (a->header_size < 4 || (a->header_size & 3) || | |
976 | a->channel > 63) | |
c70dc788 | 977 | return -EINVAL; |
872e330e SR |
978 | |
979 | cb = iso_callback; | |
980 | break; | |
981 | ||
982 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
983 | cb = (fw_iso_callback_t)iso_mc_callback; | |
c70dc788 KH |
984 | break; |
985 | ||
986 | default: | |
21efb3cf | 987 | return -EINVAL; |
c70dc788 KH |
988 | } |
989 | ||
6e95dea7 | 990 | context = fw_iso_context_create(client->device->card, a->type, |
872e330e | 991 | a->channel, a->speed, a->header_size, cb, client); |
24315c5e KH |
992 | if (IS_ERR(context)) |
993 | return PTR_ERR(context); | |
994 | ||
bdfe273e CL |
995 | /* We only support one context at this time. */ |
996 | spin_lock_irq(&client->lock); | |
997 | if (client->iso_context != NULL) { | |
998 | spin_unlock_irq(&client->lock); | |
999 | fw_iso_context_destroy(context); | |
1000 | return -EBUSY; | |
1001 | } | |
6e95dea7 | 1002 | client->iso_closure = a->closure; |
24315c5e | 1003 | client->iso_context = context; |
bdfe273e | 1004 | spin_unlock_irq(&client->lock); |
19a15b93 | 1005 | |
6e95dea7 | 1006 | a->handle = 0; |
abaa5743 | 1007 | |
19a15b93 KH |
1008 | return 0; |
1009 | } | |
1010 | ||
872e330e SR |
1011 | static int ioctl_set_iso_channels(struct client *client, union ioctl_arg *arg) |
1012 | { | |
1013 | struct fw_cdev_set_iso_channels *a = &arg->set_iso_channels; | |
1014 | struct fw_iso_context *ctx = client->iso_context; | |
1015 | ||
1016 | if (ctx == NULL || a->handle != 0) | |
1017 | return -EINVAL; | |
1018 | ||
1019 | return fw_iso_context_set_channels(ctx, &a->channels); | |
1020 | } | |
1021 | ||
1ca31ae7 KH |
1022 | /* Macros for decoding the iso packet control header. */ |
1023 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) | |
1024 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) | |
1025 | #define GET_SKIP(v) (((v) >> 17) & 0x01) | |
7a100344 SR |
1026 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
1027 | #define GET_SY(v) (((v) >> 20) & 0x0f) | |
1ca31ae7 KH |
1028 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
1029 | ||
6e95dea7 | 1030 | static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1031 | { |
6e95dea7 | 1032 | struct fw_cdev_queue_iso *a = &arg->queue_iso; |
19a15b93 | 1033 | struct fw_cdev_iso_packet __user *p, *end, *next; |
9b32d5f3 | 1034 | struct fw_iso_context *ctx = client->iso_context; |
872e330e | 1035 | unsigned long payload, buffer_end, transmit_header_bytes = 0; |
1ca31ae7 | 1036 | u32 control; |
19a15b93 KH |
1037 | int count; |
1038 | struct { | |
1039 | struct fw_iso_packet packet; | |
1040 | u8 header[256]; | |
1041 | } u; | |
1042 | ||
6e95dea7 | 1043 | if (ctx == NULL || a->handle != 0) |
19a15b93 | 1044 | return -EINVAL; |
19a15b93 | 1045 | |
c781c06d KH |
1046 | /* |
1047 | * If the user passes a non-NULL data pointer, has mmap()'ed | |
19a15b93 KH |
1048 | * the iso buffer, and the pointer points inside the buffer, |
1049 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 1050 | * set them both to 0, which will still let packets with |
19a15b93 KH |
1051 | * payload_length == 0 through. In other words, if no packets |
1052 | * use the indirect payload, the iso buffer need not be mapped | |
6e95dea7 | 1053 | * and the a->data pointer is ignored. |
c781c06d | 1054 | */ |
6e95dea7 | 1055 | payload = (unsigned long)a->data - client->vm_start; |
ef370ee7 | 1056 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
6e95dea7 | 1057 | if (a->data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 1058 | payload >= buffer_end) { |
9aad8125 | 1059 | payload = 0; |
ef370ee7 | 1060 | buffer_end = 0; |
19a15b93 KH |
1061 | } |
1062 | ||
872e330e SR |
1063 | if (ctx->type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL && payload & 3) |
1064 | return -EINVAL; | |
1ccc9147 | 1065 | |
872e330e | 1066 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets); |
6e95dea7 | 1067 | if (!access_ok(VERIFY_READ, p, a->size)) |
19a15b93 KH |
1068 | return -EFAULT; |
1069 | ||
6e95dea7 | 1070 | end = (void __user *)p + a->size; |
19a15b93 KH |
1071 | count = 0; |
1072 | while (p < end) { | |
1ca31ae7 | 1073 | if (get_user(control, &p->control)) |
19a15b93 | 1074 | return -EFAULT; |
1ca31ae7 KH |
1075 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
1076 | u.packet.interrupt = GET_INTERRUPT(control); | |
1077 | u.packet.skip = GET_SKIP(control); | |
1078 | u.packet.tag = GET_TAG(control); | |
1079 | u.packet.sy = GET_SY(control); | |
1080 | u.packet.header_length = GET_HEADER_LENGTH(control); | |
295e3feb | 1081 | |
872e330e SR |
1082 | switch (ctx->type) { |
1083 | case FW_ISO_CONTEXT_TRANSMIT: | |
1084 | if (u.packet.header_length & 3) | |
385ab5bc | 1085 | return -EINVAL; |
ae2a9766 | 1086 | transmit_header_bytes = u.packet.header_length; |
872e330e SR |
1087 | break; |
1088 | ||
1089 | case FW_ISO_CONTEXT_RECEIVE: | |
69e61d0c SR |
1090 | if (u.packet.header_length == 0 || |
1091 | u.packet.header_length % ctx->header_size != 0) | |
385ab5bc | 1092 | return -EINVAL; |
872e330e SR |
1093 | break; |
1094 | ||
1095 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
1096 | if (u.packet.payload_length == 0 || | |
1097 | u.packet.payload_length & 3) | |
295e3feb | 1098 | return -EINVAL; |
872e330e | 1099 | break; |
295e3feb KH |
1100 | } |
1101 | ||
19a15b93 | 1102 | next = (struct fw_cdev_iso_packet __user *) |
ae2a9766 | 1103 | &p->header[transmit_header_bytes / 4]; |
19a15b93 KH |
1104 | if (next > end) |
1105 | return -EINVAL; | |
1106 | if (__copy_from_user | |
ae2a9766 | 1107 | (u.packet.header, p->header, transmit_header_bytes)) |
19a15b93 | 1108 | return -EFAULT; |
98b6cbe8 | 1109 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
1110 | u.packet.header_length + u.packet.payload_length > 0) |
1111 | return -EINVAL; | |
ef370ee7 | 1112 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
1113 | return -EINVAL; |
1114 | ||
9b32d5f3 KH |
1115 | if (fw_iso_context_queue(ctx, &u.packet, |
1116 | &client->buffer, payload)) | |
19a15b93 KH |
1117 | break; |
1118 | ||
1119 | p = next; | |
1120 | payload += u.packet.payload_length; | |
1121 | count++; | |
1122 | } | |
1123 | ||
6e95dea7 SR |
1124 | a->size -= uptr_to_u64(p) - a->packets; |
1125 | a->packets = uptr_to_u64(p); | |
1126 | a->data = client->vm_start + payload; | |
19a15b93 KH |
1127 | |
1128 | return count; | |
1129 | } | |
1130 | ||
6e95dea7 | 1131 | static int ioctl_start_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1132 | { |
6e95dea7 | 1133 | struct fw_cdev_start_iso *a = &arg->start_iso; |
19a15b93 | 1134 | |
eb5b35a5 SR |
1135 | BUILD_BUG_ON( |
1136 | FW_CDEV_ISO_CONTEXT_MATCH_TAG0 != FW_ISO_CONTEXT_MATCH_TAG0 || | |
1137 | FW_CDEV_ISO_CONTEXT_MATCH_TAG1 != FW_ISO_CONTEXT_MATCH_TAG1 || | |
1138 | FW_CDEV_ISO_CONTEXT_MATCH_TAG2 != FW_ISO_CONTEXT_MATCH_TAG2 || | |
1139 | FW_CDEV_ISO_CONTEXT_MATCH_TAG3 != FW_ISO_CONTEXT_MATCH_TAG3 || | |
1140 | FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS != FW_ISO_CONTEXT_MATCH_ALL_TAGS); | |
1141 | ||
6e95dea7 | 1142 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 | 1143 | return -EINVAL; |
fae60312 | 1144 | |
6e95dea7 SR |
1145 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE && |
1146 | (a->tags == 0 || a->tags > 15 || a->sync > 15)) | |
1147 | return -EINVAL; | |
eb0306ea | 1148 | |
6e95dea7 SR |
1149 | return fw_iso_context_start(client->iso_context, |
1150 | a->cycle, a->sync, a->tags); | |
19a15b93 KH |
1151 | } |
1152 | ||
6e95dea7 | 1153 | static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg) |
b8295668 | 1154 | { |
6e95dea7 | 1155 | struct fw_cdev_stop_iso *a = &arg->stop_iso; |
abaa5743 | 1156 | |
6e95dea7 | 1157 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 KH |
1158 | return -EINVAL; |
1159 | ||
b8295668 KH |
1160 | return fw_iso_context_stop(client->iso_context); |
1161 | } | |
1162 | ||
6e95dea7 | 1163 | static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg) |
a64408b9 | 1164 | { |
6e95dea7 | 1165 | struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2; |
a64408b9 | 1166 | struct fw_card *card = client->device->card; |
abfe5a01 | 1167 | struct timespec ts = {0, 0}; |
4a9bde9b | 1168 | u32 cycle_time; |
abfe5a01 | 1169 | int ret = 0; |
a64408b9 | 1170 | |
4a9bde9b | 1171 | local_irq_disable(); |
a64408b9 | 1172 | |
0fcff4e3 | 1173 | cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME); |
abfe5a01 | 1174 | |
6e95dea7 | 1175 | switch (a->clk_id) { |
abfe5a01 SR |
1176 | case CLOCK_REALTIME: getnstimeofday(&ts); break; |
1177 | case CLOCK_MONOTONIC: do_posix_clock_monotonic_gettime(&ts); break; | |
1178 | case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts); break; | |
1179 | default: | |
1180 | ret = -EINVAL; | |
1181 | } | |
a64408b9 | 1182 | |
4a9bde9b | 1183 | local_irq_enable(); |
a64408b9 | 1184 | |
6e95dea7 SR |
1185 | a->tv_sec = ts.tv_sec; |
1186 | a->tv_nsec = ts.tv_nsec; | |
1187 | a->cycle_timer = cycle_time; | |
abfe5a01 SR |
1188 | |
1189 | return ret; | |
1190 | } | |
1191 | ||
6e95dea7 | 1192 | static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg) |
abfe5a01 | 1193 | { |
6e95dea7 | 1194 | struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer; |
abfe5a01 SR |
1195 | struct fw_cdev_get_cycle_timer2 ct2; |
1196 | ||
1197 | ct2.clk_id = CLOCK_REALTIME; | |
6e95dea7 | 1198 | ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2); |
abfe5a01 | 1199 | |
6e95dea7 SR |
1200 | a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC; |
1201 | a->cycle_timer = ct2.cycle_timer; | |
4a9bde9b | 1202 | |
a64408b9 SR |
1203 | return 0; |
1204 | } | |
1205 | ||
b1bda4cd JFSR |
1206 | static void iso_resource_work(struct work_struct *work) |
1207 | { | |
1208 | struct iso_resource_event *e; | |
1209 | struct iso_resource *r = | |
1210 | container_of(work, struct iso_resource, work.work); | |
1211 | struct client *client = r->client; | |
1212 | int generation, channel, bandwidth, todo; | |
1213 | bool skip, free, success; | |
1214 | ||
1215 | spin_lock_irq(&client->lock); | |
1216 | generation = client->device->generation; | |
1217 | todo = r->todo; | |
1218 | /* Allow 1000ms grace period for other reallocations. */ | |
1219 | if (todo == ISO_RES_ALLOC && | |
1220 | time_is_after_jiffies(client->device->card->reset_jiffies + HZ)) { | |
9fb551bf | 1221 | schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3)); |
b1bda4cd JFSR |
1222 | skip = true; |
1223 | } else { | |
1224 | /* We could be called twice within the same generation. */ | |
1225 | skip = todo == ISO_RES_REALLOC && | |
1226 | r->generation == generation; | |
1227 | } | |
1ec3c026 SR |
1228 | free = todo == ISO_RES_DEALLOC || |
1229 | todo == ISO_RES_ALLOC_ONCE || | |
1230 | todo == ISO_RES_DEALLOC_ONCE; | |
b1bda4cd JFSR |
1231 | r->generation = generation; |
1232 | spin_unlock_irq(&client->lock); | |
1233 | ||
1234 | if (skip) | |
1235 | goto out; | |
1236 | ||
1237 | bandwidth = r->bandwidth; | |
1238 | ||
1239 | fw_iso_resource_manage(client->device->card, generation, | |
1240 | r->channels, &channel, &bandwidth, | |
1ec3c026 SR |
1241 | todo == ISO_RES_ALLOC || |
1242 | todo == ISO_RES_REALLOC || | |
6fdc0370 SR |
1243 | todo == ISO_RES_ALLOC_ONCE, |
1244 | r->transaction_data); | |
b1bda4cd JFSR |
1245 | /* |
1246 | * Is this generation outdated already? As long as this resource sticks | |
1247 | * in the idr, it will be scheduled again for a newer generation or at | |
1248 | * shutdown. | |
1249 | */ | |
1250 | if (channel == -EAGAIN && | |
1251 | (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC)) | |
1252 | goto out; | |
1253 | ||
1254 | success = channel >= 0 || bandwidth > 0; | |
1255 | ||
1256 | spin_lock_irq(&client->lock); | |
1257 | /* | |
1258 | * Transit from allocation to reallocation, except if the client | |
1259 | * requested deallocation in the meantime. | |
1260 | */ | |
1261 | if (r->todo == ISO_RES_ALLOC) | |
1262 | r->todo = ISO_RES_REALLOC; | |
1263 | /* | |
1264 | * Allocation or reallocation failure? Pull this resource out of the | |
1265 | * idr and prepare for deletion, unless the client is shutting down. | |
1266 | */ | |
1267 | if (r->todo == ISO_RES_REALLOC && !success && | |
1268 | !client->in_shutdown && | |
1269 | idr_find(&client->resource_idr, r->resource.handle)) { | |
1270 | idr_remove(&client->resource_idr, r->resource.handle); | |
1271 | client_put(client); | |
1272 | free = true; | |
1273 | } | |
1274 | spin_unlock_irq(&client->lock); | |
1275 | ||
1276 | if (todo == ISO_RES_ALLOC && channel >= 0) | |
5d9cb7d2 | 1277 | r->channels = 1ULL << channel; |
b1bda4cd JFSR |
1278 | |
1279 | if (todo == ISO_RES_REALLOC && success) | |
1280 | goto out; | |
1281 | ||
1ec3c026 | 1282 | if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) { |
b1bda4cd JFSR |
1283 | e = r->e_alloc; |
1284 | r->e_alloc = NULL; | |
1285 | } else { | |
1286 | e = r->e_dealloc; | |
1287 | r->e_dealloc = NULL; | |
1288 | } | |
e21fcf79 SR |
1289 | e->iso_resource.handle = r->resource.handle; |
1290 | e->iso_resource.channel = channel; | |
1291 | e->iso_resource.bandwidth = bandwidth; | |
b1bda4cd JFSR |
1292 | |
1293 | queue_event(client, &e->event, | |
e21fcf79 | 1294 | &e->iso_resource, sizeof(e->iso_resource), NULL, 0); |
b1bda4cd JFSR |
1295 | |
1296 | if (free) { | |
1297 | cancel_delayed_work(&r->work); | |
1298 | kfree(r->e_alloc); | |
1299 | kfree(r->e_dealloc); | |
1300 | kfree(r); | |
1301 | } | |
1302 | out: | |
1303 | client_put(client); | |
1304 | } | |
1305 | ||
b1bda4cd JFSR |
1306 | static void release_iso_resource(struct client *client, |
1307 | struct client_resource *resource) | |
1308 | { | |
1309 | struct iso_resource *r = | |
1310 | container_of(resource, struct iso_resource, resource); | |
1311 | ||
1312 | spin_lock_irq(&client->lock); | |
1313 | r->todo = ISO_RES_DEALLOC; | |
9fb551bf | 1314 | schedule_iso_resource(r, 0); |
b1bda4cd JFSR |
1315 | spin_unlock_irq(&client->lock); |
1316 | } | |
1317 | ||
1ec3c026 SR |
1318 | static int init_iso_resource(struct client *client, |
1319 | struct fw_cdev_allocate_iso_resource *request, int todo) | |
b1bda4cd | 1320 | { |
b1bda4cd JFSR |
1321 | struct iso_resource_event *e1, *e2; |
1322 | struct iso_resource *r; | |
1323 | int ret; | |
1324 | ||
1325 | if ((request->channels == 0 && request->bandwidth == 0) || | |
1326 | request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL || | |
1327 | request->bandwidth < 0) | |
1328 | return -EINVAL; | |
1329 | ||
1330 | r = kmalloc(sizeof(*r), GFP_KERNEL); | |
1331 | e1 = kmalloc(sizeof(*e1), GFP_KERNEL); | |
1332 | e2 = kmalloc(sizeof(*e2), GFP_KERNEL); | |
1333 | if (r == NULL || e1 == NULL || e2 == NULL) { | |
1334 | ret = -ENOMEM; | |
1335 | goto fail; | |
1336 | } | |
1337 | ||
1338 | INIT_DELAYED_WORK(&r->work, iso_resource_work); | |
1339 | r->client = client; | |
1ec3c026 | 1340 | r->todo = todo; |
b1bda4cd JFSR |
1341 | r->generation = -1; |
1342 | r->channels = request->channels; | |
1343 | r->bandwidth = request->bandwidth; | |
1344 | r->e_alloc = e1; | |
1345 | r->e_dealloc = e2; | |
1346 | ||
e21fcf79 SR |
1347 | e1->iso_resource.closure = request->closure; |
1348 | e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED; | |
1349 | e2->iso_resource.closure = request->closure; | |
1350 | e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED; | |
b1bda4cd | 1351 | |
1ec3c026 SR |
1352 | if (todo == ISO_RES_ALLOC) { |
1353 | r->resource.release = release_iso_resource; | |
1354 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
81610b8f SR |
1355 | if (ret < 0) |
1356 | goto fail; | |
1ec3c026 SR |
1357 | } else { |
1358 | r->resource.release = NULL; | |
1359 | r->resource.handle = -1; | |
9fb551bf | 1360 | schedule_iso_resource(r, 0); |
1ec3c026 | 1361 | } |
b1bda4cd JFSR |
1362 | request->handle = r->resource.handle; |
1363 | ||
1364 | return 0; | |
1365 | fail: | |
1366 | kfree(r); | |
1367 | kfree(e1); | |
1368 | kfree(e2); | |
1369 | ||
1370 | return ret; | |
1371 | } | |
1372 | ||
6e95dea7 SR |
1373 | static int ioctl_allocate_iso_resource(struct client *client, |
1374 | union ioctl_arg *arg) | |
1ec3c026 | 1375 | { |
6e95dea7 SR |
1376 | return init_iso_resource(client, |
1377 | &arg->allocate_iso_resource, ISO_RES_ALLOC); | |
1ec3c026 SR |
1378 | } |
1379 | ||
6e95dea7 SR |
1380 | static int ioctl_deallocate_iso_resource(struct client *client, |
1381 | union ioctl_arg *arg) | |
b1bda4cd | 1382 | { |
6e95dea7 SR |
1383 | return release_client_resource(client, |
1384 | arg->deallocate.handle, release_iso_resource, NULL); | |
b1bda4cd JFSR |
1385 | } |
1386 | ||
6e95dea7 SR |
1387 | static int ioctl_allocate_iso_resource_once(struct client *client, |
1388 | union ioctl_arg *arg) | |
1ec3c026 | 1389 | { |
6e95dea7 SR |
1390 | return init_iso_resource(client, |
1391 | &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE); | |
1ec3c026 SR |
1392 | } |
1393 | ||
6e95dea7 SR |
1394 | static int ioctl_deallocate_iso_resource_once(struct client *client, |
1395 | union ioctl_arg *arg) | |
1ec3c026 | 1396 | { |
6e95dea7 SR |
1397 | return init_iso_resource(client, |
1398 | &arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE); | |
1ec3c026 SR |
1399 | } |
1400 | ||
c8a25900 SR |
1401 | /* |
1402 | * Returns a speed code: Maximum speed to or from this device, | |
1403 | * limited by the device's link speed, the local node's link speed, | |
1404 | * and all PHY port speeds between the two links. | |
1405 | */ | |
6e95dea7 | 1406 | static int ioctl_get_speed(struct client *client, union ioctl_arg *arg) |
33580a3e | 1407 | { |
c8a25900 | 1408 | return client->device->max_speed; |
33580a3e SR |
1409 | } |
1410 | ||
6e95dea7 SR |
1411 | static int ioctl_send_broadcast_request(struct client *client, |
1412 | union ioctl_arg *arg) | |
acfe8333 | 1413 | { |
6e95dea7 | 1414 | struct fw_cdev_send_request *a = &arg->send_request; |
acfe8333 | 1415 | |
6e95dea7 | 1416 | switch (a->tcode) { |
acfe8333 JFSR |
1417 | case TCODE_WRITE_QUADLET_REQUEST: |
1418 | case TCODE_WRITE_BLOCK_REQUEST: | |
1419 | break; | |
1420 | default: | |
1421 | return -EINVAL; | |
1422 | } | |
1423 | ||
1566f3dc | 1424 | /* Security policy: Only allow accesses to Units Space. */ |
6e95dea7 | 1425 | if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END) |
1566f3dc SR |
1426 | return -EACCES; |
1427 | ||
6e95dea7 | 1428 | return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100); |
acfe8333 JFSR |
1429 | } |
1430 | ||
6e95dea7 | 1431 | static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg) |
f8c2287c | 1432 | { |
6e95dea7 | 1433 | struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet; |
18e9b10f SR |
1434 | struct fw_cdev_send_request request; |
1435 | int dest; | |
f8c2287c | 1436 | |
6e95dea7 SR |
1437 | if (a->speed > client->device->card->link_speed || |
1438 | a->length > 1024 << a->speed) | |
18e9b10f | 1439 | return -EIO; |
f8c2287c | 1440 | |
6e95dea7 | 1441 | if (a->tag > 3 || a->channel > 63 || a->sy > 15) |
18e9b10f SR |
1442 | return -EINVAL; |
1443 | ||
6e95dea7 | 1444 | dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy); |
18e9b10f | 1445 | request.tcode = TCODE_STREAM_DATA; |
6e95dea7 SR |
1446 | request.length = a->length; |
1447 | request.closure = a->closure; | |
1448 | request.data = a->data; | |
1449 | request.generation = a->generation; | |
18e9b10f | 1450 | |
6e95dea7 | 1451 | return init_request(client, &request, dest, a->speed); |
f8c2287c JF |
1452 | } |
1453 | ||
850bb6f2 SR |
1454 | static void outbound_phy_packet_callback(struct fw_packet *packet, |
1455 | struct fw_card *card, int status) | |
1456 | { | |
1457 | struct outbound_phy_packet_event *e = | |
1458 | container_of(packet, struct outbound_phy_packet_event, p); | |
1459 | ||
1460 | switch (status) { | |
1461 | /* expected: */ | |
1462 | case ACK_COMPLETE: e->phy_packet.rcode = RCODE_COMPLETE; break; | |
1463 | /* should never happen with PHY packets: */ | |
1464 | case ACK_PENDING: e->phy_packet.rcode = RCODE_COMPLETE; break; | |
1465 | case ACK_BUSY_X: | |
1466 | case ACK_BUSY_A: | |
1467 | case ACK_BUSY_B: e->phy_packet.rcode = RCODE_BUSY; break; | |
1468 | case ACK_DATA_ERROR: e->phy_packet.rcode = RCODE_DATA_ERROR; break; | |
1469 | case ACK_TYPE_ERROR: e->phy_packet.rcode = RCODE_TYPE_ERROR; break; | |
1470 | /* stale generation; cancelled; on certain controllers: no ack */ | |
1471 | default: e->phy_packet.rcode = status; break; | |
1472 | } | |
cc550216 | 1473 | e->phy_packet.data[0] = packet->timestamp; |
850bb6f2 | 1474 | |
cc550216 SR |
1475 | queue_event(e->client, &e->event, &e->phy_packet, |
1476 | sizeof(e->phy_packet) + e->phy_packet.length, NULL, 0); | |
850bb6f2 SR |
1477 | client_put(e->client); |
1478 | } | |
1479 | ||
1480 | static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg) | |
1481 | { | |
1482 | struct fw_cdev_send_phy_packet *a = &arg->send_phy_packet; | |
1483 | struct fw_card *card = client->device->card; | |
1484 | struct outbound_phy_packet_event *e; | |
1485 | ||
1486 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1487 | if (!client->device->is_local) | |
1488 | return -ENOSYS; | |
1489 | ||
cc550216 | 1490 | e = kzalloc(sizeof(*e) + 4, GFP_KERNEL); |
850bb6f2 SR |
1491 | if (e == NULL) |
1492 | return -ENOMEM; | |
1493 | ||
1494 | client_get(client); | |
1495 | e->client = client; | |
1496 | e->p.speed = SCODE_100; | |
1497 | e->p.generation = a->generation; | |
5b06db16 CL |
1498 | e->p.header[0] = TCODE_LINK_INTERNAL << 4; |
1499 | e->p.header[1] = a->data[0]; | |
1500 | e->p.header[2] = a->data[1]; | |
1501 | e->p.header_length = 12; | |
850bb6f2 SR |
1502 | e->p.callback = outbound_phy_packet_callback; |
1503 | e->phy_packet.closure = a->closure; | |
1504 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_SENT; | |
cc550216 SR |
1505 | if (is_ping_packet(a->data)) |
1506 | e->phy_packet.length = 4; | |
850bb6f2 SR |
1507 | |
1508 | card->driver->send_request(card, &e->p); | |
1509 | ||
1510 | return 0; | |
1511 | } | |
1512 | ||
bf54e146 SR |
1513 | static int ioctl_receive_phy_packets(struct client *client, union ioctl_arg *arg) |
1514 | { | |
1515 | struct fw_cdev_receive_phy_packets *a = &arg->receive_phy_packets; | |
1516 | struct fw_card *card = client->device->card; | |
1517 | ||
1518 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1519 | if (!client->device->is_local) | |
1520 | return -ENOSYS; | |
1521 | ||
1522 | spin_lock_irq(&card->lock); | |
1523 | ||
1524 | list_move_tail(&client->phy_receiver_link, &card->phy_receiver_list); | |
1525 | client->phy_receiver_closure = a->closure; | |
1526 | ||
1527 | spin_unlock_irq(&card->lock); | |
1528 | ||
1529 | return 0; | |
1530 | } | |
1531 | ||
1532 | void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p) | |
1533 | { | |
1534 | struct client *client; | |
1535 | struct inbound_phy_packet_event *e; | |
1536 | unsigned long flags; | |
1537 | ||
1538 | spin_lock_irqsave(&card->lock, flags); | |
1539 | ||
1540 | list_for_each_entry(client, &card->phy_receiver_list, phy_receiver_link) { | |
1541 | e = kmalloc(sizeof(*e) + 8, GFP_ATOMIC); | |
1542 | if (e == NULL) { | |
1543 | fw_notify("Out of memory when allocating event\n"); | |
1544 | break; | |
1545 | } | |
1546 | e->phy_packet.closure = client->phy_receiver_closure; | |
1547 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_RECEIVED; | |
1548 | e->phy_packet.rcode = RCODE_COMPLETE; | |
1549 | e->phy_packet.length = 8; | |
1550 | e->phy_packet.data[0] = p->header[1]; | |
1551 | e->phy_packet.data[1] = p->header[2]; | |
1552 | queue_event(client, &e->event, | |
1553 | &e->phy_packet, sizeof(e->phy_packet) + 8, NULL, 0); | |
1554 | } | |
1555 | ||
1556 | spin_unlock_irqrestore(&card->lock, flags); | |
1557 | } | |
1558 | ||
6e95dea7 | 1559 | static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = { |
b9dc61cf SR |
1560 | [0x00] = ioctl_get_info, |
1561 | [0x01] = ioctl_send_request, | |
1562 | [0x02] = ioctl_allocate, | |
1563 | [0x03] = ioctl_deallocate, | |
1564 | [0x04] = ioctl_send_response, | |
1565 | [0x05] = ioctl_initiate_bus_reset, | |
1566 | [0x06] = ioctl_add_descriptor, | |
1567 | [0x07] = ioctl_remove_descriptor, | |
1568 | [0x08] = ioctl_create_iso_context, | |
1569 | [0x09] = ioctl_queue_iso, | |
1570 | [0x0a] = ioctl_start_iso, | |
1571 | [0x0b] = ioctl_stop_iso, | |
1572 | [0x0c] = ioctl_get_cycle_timer, | |
1573 | [0x0d] = ioctl_allocate_iso_resource, | |
1574 | [0x0e] = ioctl_deallocate_iso_resource, | |
1575 | [0x0f] = ioctl_allocate_iso_resource_once, | |
1576 | [0x10] = ioctl_deallocate_iso_resource_once, | |
1577 | [0x11] = ioctl_get_speed, | |
1578 | [0x12] = ioctl_send_broadcast_request, | |
1579 | [0x13] = ioctl_send_stream_packet, | |
1580 | [0x14] = ioctl_get_cycle_timer2, | |
850bb6f2 | 1581 | [0x15] = ioctl_send_phy_packet, |
bf54e146 | 1582 | [0x16] = ioctl_receive_phy_packets, |
872e330e | 1583 | [0x17] = ioctl_set_iso_channels, |
4f259223 KH |
1584 | }; |
1585 | ||
53dca511 SR |
1586 | static int dispatch_ioctl(struct client *client, |
1587 | unsigned int cmd, void __user *arg) | |
19a15b93 | 1588 | { |
6e95dea7 | 1589 | union ioctl_arg buffer; |
2dbd7d7e | 1590 | int ret; |
4f259223 | 1591 | |
64582298 SR |
1592 | if (fw_device_is_shutdown(client->device)) |
1593 | return -ENODEV; | |
1594 | ||
4f259223 | 1595 | if (_IOC_TYPE(cmd) != '#' || |
9cac00b8 SR |
1596 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) || |
1597 | _IOC_SIZE(cmd) > sizeof(buffer)) | |
19a15b93 | 1598 | return -EINVAL; |
4f259223 | 1599 | |
9cac00b8 SR |
1600 | if (_IOC_DIR(cmd) == _IOC_READ) |
1601 | memset(&buffer, 0, _IOC_SIZE(cmd)); | |
1602 | ||
1603 | if (_IOC_DIR(cmd) & _IOC_WRITE) | |
1604 | if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd))) | |
4f259223 | 1605 | return -EFAULT; |
4f259223 | 1606 | |
6e95dea7 | 1607 | ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer); |
2dbd7d7e SR |
1608 | if (ret < 0) |
1609 | return ret; | |
4f259223 | 1610 | |
9cac00b8 SR |
1611 | if (_IOC_DIR(cmd) & _IOC_READ) |
1612 | if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd))) | |
4f259223 | 1613 | return -EFAULT; |
4f259223 | 1614 | |
2dbd7d7e | 1615 | return ret; |
19a15b93 KH |
1616 | } |
1617 | ||
53dca511 SR |
1618 | static long fw_device_op_ioctl(struct file *file, |
1619 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1620 | { |
64582298 | 1621 | return dispatch_ioctl(file->private_data, cmd, (void __user *)arg); |
19a15b93 KH |
1622 | } |
1623 | ||
1624 | #ifdef CONFIG_COMPAT | |
53dca511 SR |
1625 | static long fw_device_op_compat_ioctl(struct file *file, |
1626 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1627 | { |
64582298 | 1628 | return dispatch_ioctl(file->private_data, cmd, compat_ptr(arg)); |
19a15b93 KH |
1629 | } |
1630 | #endif | |
1631 | ||
1632 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
1633 | { | |
1634 | struct client *client = file->private_data; | |
9aad8125 KH |
1635 | enum dma_data_direction direction; |
1636 | unsigned long size; | |
2dbd7d7e | 1637 | int page_count, ret; |
9aad8125 | 1638 | |
551f4cb9 JF |
1639 | if (fw_device_is_shutdown(client->device)) |
1640 | return -ENODEV; | |
1641 | ||
9aad8125 KH |
1642 | /* FIXME: We could support multiple buffers, but we don't. */ |
1643 | if (client->buffer.pages != NULL) | |
1644 | return -EBUSY; | |
1645 | ||
1646 | if (!(vma->vm_flags & VM_SHARED)) | |
1647 | return -EINVAL; | |
19a15b93 | 1648 | |
9aad8125 | 1649 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
1650 | return -EINVAL; |
1651 | ||
1652 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
1653 | size = vma->vm_end - vma->vm_start; |
1654 | page_count = size >> PAGE_SHIFT; | |
1655 | if (size & ~PAGE_MASK) | |
1656 | return -EINVAL; | |
1657 | ||
1658 | if (vma->vm_flags & VM_WRITE) | |
1659 | direction = DMA_TO_DEVICE; | |
1660 | else | |
1661 | direction = DMA_FROM_DEVICE; | |
1662 | ||
2dbd7d7e SR |
1663 | ret = fw_iso_buffer_init(&client->buffer, client->device->card, |
1664 | page_count, direction); | |
1665 | if (ret < 0) | |
1666 | return ret; | |
19a15b93 | 1667 | |
2dbd7d7e SR |
1668 | ret = fw_iso_buffer_map(&client->buffer, vma); |
1669 | if (ret < 0) | |
9aad8125 KH |
1670 | fw_iso_buffer_destroy(&client->buffer, client->device->card); |
1671 | ||
2dbd7d7e | 1672 | return ret; |
19a15b93 KH |
1673 | } |
1674 | ||
45ee3199 JF |
1675 | static int shutdown_resource(int id, void *p, void *data) |
1676 | { | |
e21fcf79 | 1677 | struct client_resource *resource = p; |
45ee3199 JF |
1678 | struct client *client = data; |
1679 | ||
e21fcf79 | 1680 | resource->release(client, resource); |
fb443036 | 1681 | client_put(client); |
45ee3199 JF |
1682 | |
1683 | return 0; | |
1684 | } | |
1685 | ||
19a15b93 KH |
1686 | static int fw_device_op_release(struct inode *inode, struct file *file) |
1687 | { | |
1688 | struct client *client = file->private_data; | |
e21fcf79 | 1689 | struct event *event, *next_event; |
19a15b93 | 1690 | |
bf54e146 SR |
1691 | spin_lock_irq(&client->device->card->lock); |
1692 | list_del(&client->phy_receiver_link); | |
1693 | spin_unlock_irq(&client->device->card->lock); | |
1694 | ||
97811e34 SR |
1695 | mutex_lock(&client->device->client_list_mutex); |
1696 | list_del(&client->link); | |
1697 | mutex_unlock(&client->device->client_list_mutex); | |
1698 | ||
19a15b93 KH |
1699 | if (client->iso_context) |
1700 | fw_iso_context_destroy(client->iso_context); | |
1701 | ||
36a755cf SR |
1702 | if (client->buffer.pages) |
1703 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
1704 | ||
45ee3199 | 1705 | /* Freeze client->resource_idr and client->event_list */ |
3ba94986 | 1706 | spin_lock_irq(&client->lock); |
45ee3199 | 1707 | client->in_shutdown = true; |
3ba94986 | 1708 | spin_unlock_irq(&client->lock); |
66dea3e5 | 1709 | |
45ee3199 JF |
1710 | idr_for_each(&client->resource_idr, shutdown_resource, client); |
1711 | idr_remove_all(&client->resource_idr); | |
1712 | idr_destroy(&client->resource_idr); | |
28cf6a04 | 1713 | |
e21fcf79 SR |
1714 | list_for_each_entry_safe(event, next_event, &client->event_list, link) |
1715 | kfree(event); | |
19a15b93 | 1716 | |
fb443036 | 1717 | client_put(client); |
19a15b93 KH |
1718 | |
1719 | return 0; | |
1720 | } | |
1721 | ||
1722 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
1723 | { | |
1724 | struct client *client = file->private_data; | |
2603bf21 | 1725 | unsigned int mask = 0; |
19a15b93 KH |
1726 | |
1727 | poll_wait(file, &client->wait, pt); | |
1728 | ||
2603bf21 KH |
1729 | if (fw_device_is_shutdown(client->device)) |
1730 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 1731 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
1732 | mask |= POLLIN | POLLRDNORM; |
1733 | ||
1734 | return mask; | |
19a15b93 KH |
1735 | } |
1736 | ||
21ebcd12 | 1737 | const struct file_operations fw_device_ops = { |
19a15b93 | 1738 | .owner = THIS_MODULE, |
3ac26b2e | 1739 | .llseek = no_llseek, |
19a15b93 KH |
1740 | .open = fw_device_op_open, |
1741 | .read = fw_device_op_read, | |
1742 | .unlocked_ioctl = fw_device_op_ioctl, | |
19a15b93 | 1743 | .mmap = fw_device_op_mmap, |
3ac26b2e SR |
1744 | .release = fw_device_op_release, |
1745 | .poll = fw_device_op_poll, | |
19a15b93 | 1746 | #ifdef CONFIG_COMPAT |
5af4e5ea | 1747 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
1748 | #endif |
1749 | }; |