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> |
a99bbaf5 | 37 | #include <linux/sched.h> |
cf417e54 | 38 | #include <linux/spinlock.h> |
281e2032 | 39 | #include <linux/string.h> |
be5bbd67 | 40 | #include <linux/time.h> |
e034d242 | 41 | #include <linux/uaccess.h> |
be5bbd67 SR |
42 | #include <linux/vmalloc.h> |
43 | #include <linux/wait.h> | |
b1bda4cd | 44 | #include <linux/workqueue.h> |
be5bbd67 | 45 | |
a64408b9 | 46 | #include <asm/system.h> |
be5bbd67 | 47 | |
77c9a5da | 48 | #include "core.h" |
19a15b93 | 49 | |
604f4516 SR |
50 | /* |
51 | * ABI version history is documented in linux/firewire-cdev.h. | |
52 | */ | |
8e2b2b46 SR |
53 | #define FW_CDEV_KERNEL_VERSION 4 |
54 | #define FW_CDEV_VERSION_EVENT_REQUEST2 4 | |
55 | #define FW_CDEV_VERSION_ALLOCATE_REGION_END 4 | |
604f4516 | 56 | |
19a15b93 | 57 | struct client { |
344bbc4d | 58 | u32 version; |
19a15b93 | 59 | struct fw_device *device; |
45ee3199 | 60 | |
19a15b93 | 61 | spinlock_t lock; |
45ee3199 JF |
62 | bool in_shutdown; |
63 | struct idr resource_idr; | |
19a15b93 | 64 | struct list_head event_list; |
19a15b93 | 65 | wait_queue_head_t wait; |
da8ecffa | 66 | u64 bus_reset_closure; |
9aad8125 | 67 | |
19a15b93 | 68 | struct fw_iso_context *iso_context; |
abaa5743 | 69 | u64 iso_closure; |
9aad8125 KH |
70 | struct fw_iso_buffer buffer; |
71 | unsigned long vm_start; | |
97bd9efa | 72 | |
bf54e146 SR |
73 | struct list_head phy_receiver_link; |
74 | u64 phy_receiver_closure; | |
75 | ||
97bd9efa | 76 | struct list_head link; |
fb443036 | 77 | struct kref kref; |
19a15b93 KH |
78 | }; |
79 | ||
fb443036 SR |
80 | static inline void client_get(struct client *client) |
81 | { | |
82 | kref_get(&client->kref); | |
83 | } | |
84 | ||
85 | static void client_release(struct kref *kref) | |
86 | { | |
87 | struct client *client = container_of(kref, struct client, kref); | |
88 | ||
89 | fw_device_put(client->device); | |
90 | kfree(client); | |
91 | } | |
92 | ||
93 | static void client_put(struct client *client) | |
94 | { | |
95 | kref_put(&client->kref, client_release); | |
96 | } | |
97 | ||
97c18b7f SR |
98 | struct client_resource; |
99 | typedef void (*client_resource_release_fn_t)(struct client *, | |
100 | struct client_resource *); | |
101 | struct client_resource { | |
102 | client_resource_release_fn_t release; | |
103 | int handle; | |
104 | }; | |
105 | ||
106 | struct address_handler_resource { | |
107 | struct client_resource resource; | |
108 | struct fw_address_handler handler; | |
109 | __u64 closure; | |
110 | struct client *client; | |
111 | }; | |
112 | ||
113 | struct outbound_transaction_resource { | |
114 | struct client_resource resource; | |
115 | struct fw_transaction transaction; | |
116 | }; | |
117 | ||
118 | struct inbound_transaction_resource { | |
119 | struct client_resource resource; | |
08bd34c9 | 120 | struct fw_card *card; |
97c18b7f SR |
121 | struct fw_request *request; |
122 | void *data; | |
123 | size_t length; | |
124 | }; | |
125 | ||
126 | struct descriptor_resource { | |
127 | struct client_resource resource; | |
128 | struct fw_descriptor descriptor; | |
129 | u32 data[0]; | |
130 | }; | |
131 | ||
b1bda4cd JFSR |
132 | struct iso_resource { |
133 | struct client_resource resource; | |
134 | struct client *client; | |
135 | /* Schedule work and access todo only with client->lock held. */ | |
136 | struct delayed_work work; | |
1ec3c026 SR |
137 | enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC, |
138 | ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo; | |
b1bda4cd JFSR |
139 | int generation; |
140 | u64 channels; | |
141 | s32 bandwidth; | |
6fdc0370 | 142 | __be32 transaction_data[2]; |
b1bda4cd JFSR |
143 | struct iso_resource_event *e_alloc, *e_dealloc; |
144 | }; | |
145 | ||
b1bda4cd JFSR |
146 | static void release_iso_resource(struct client *, struct client_resource *); |
147 | ||
9fb551bf SR |
148 | static void schedule_iso_resource(struct iso_resource *r, unsigned long delay) |
149 | { | |
150 | client_get(r->client); | |
151 | if (!schedule_delayed_work(&r->work, delay)) | |
152 | client_put(r->client); | |
153 | } | |
154 | ||
155 | static void schedule_if_iso_resource(struct client_resource *resource) | |
156 | { | |
157 | if (resource->release == release_iso_resource) | |
158 | schedule_iso_resource(container_of(resource, | |
159 | struct iso_resource, resource), 0); | |
160 | } | |
161 | ||
97c18b7f SR |
162 | /* |
163 | * dequeue_event() just kfree()'s the event, so the event has to be | |
164 | * the first field in a struct XYZ_event. | |
165 | */ | |
166 | struct event { | |
167 | struct { void *data; size_t size; } v[2]; | |
168 | struct list_head link; | |
169 | }; | |
170 | ||
171 | struct bus_reset_event { | |
172 | struct event event; | |
173 | struct fw_cdev_event_bus_reset reset; | |
174 | }; | |
175 | ||
176 | struct outbound_transaction_event { | |
177 | struct event event; | |
178 | struct client *client; | |
179 | struct outbound_transaction_resource r; | |
180 | struct fw_cdev_event_response response; | |
181 | }; | |
182 | ||
183 | struct inbound_transaction_event { | |
184 | struct event event; | |
e205597d SR |
185 | union { |
186 | struct fw_cdev_event_request request; | |
187 | struct fw_cdev_event_request2 request2; | |
188 | } req; | |
97c18b7f SR |
189 | }; |
190 | ||
191 | struct iso_interrupt_event { | |
192 | struct event event; | |
193 | struct fw_cdev_event_iso_interrupt interrupt; | |
194 | }; | |
195 | ||
b1bda4cd JFSR |
196 | struct iso_resource_event { |
197 | struct event event; | |
e21fcf79 | 198 | struct fw_cdev_event_iso_resource iso_resource; |
b1bda4cd JFSR |
199 | }; |
200 | ||
850bb6f2 SR |
201 | struct outbound_phy_packet_event { |
202 | struct event event; | |
203 | struct client *client; | |
204 | struct fw_packet p; | |
205 | struct fw_cdev_event_phy_packet phy_packet; | |
206 | }; | |
207 | ||
bf54e146 SR |
208 | struct inbound_phy_packet_event { |
209 | struct event event; | |
210 | struct fw_cdev_event_phy_packet phy_packet; | |
211 | }; | |
212 | ||
53dca511 | 213 | static inline void __user *u64_to_uptr(__u64 value) |
19a15b93 KH |
214 | { |
215 | return (void __user *)(unsigned long)value; | |
216 | } | |
217 | ||
53dca511 | 218 | static inline __u64 uptr_to_u64(void __user *ptr) |
19a15b93 KH |
219 | { |
220 | return (__u64)(unsigned long)ptr; | |
221 | } | |
222 | ||
223 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
224 | { | |
225 | struct fw_device *device; | |
226 | struct client *client; | |
227 | ||
96b19062 | 228 | device = fw_device_get_by_devt(inode->i_rdev); |
a3aca3da KH |
229 | if (device == NULL) |
230 | return -ENODEV; | |
19a15b93 | 231 | |
551f4cb9 JF |
232 | if (fw_device_is_shutdown(device)) { |
233 | fw_device_put(device); | |
234 | return -ENODEV; | |
235 | } | |
236 | ||
2d826cc5 | 237 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
96b19062 SR |
238 | if (client == NULL) { |
239 | fw_device_put(device); | |
19a15b93 | 240 | return -ENOMEM; |
96b19062 | 241 | } |
19a15b93 | 242 | |
96b19062 | 243 | client->device = device; |
19a15b93 | 244 | spin_lock_init(&client->lock); |
45ee3199 JF |
245 | idr_init(&client->resource_idr); |
246 | INIT_LIST_HEAD(&client->event_list); | |
19a15b93 | 247 | init_waitqueue_head(&client->wait); |
bf54e146 | 248 | INIT_LIST_HEAD(&client->phy_receiver_link); |
fb443036 | 249 | kref_init(&client->kref); |
19a15b93 KH |
250 | |
251 | file->private_data = client; | |
252 | ||
d67cfb96 | 253 | mutex_lock(&device->client_list_mutex); |
97bd9efa | 254 | list_add_tail(&client->link, &device->client_list); |
d67cfb96 | 255 | mutex_unlock(&device->client_list_mutex); |
97bd9efa | 256 | |
3ac26b2e | 257 | return nonseekable_open(inode, file); |
19a15b93 KH |
258 | } |
259 | ||
260 | static void queue_event(struct client *client, struct event *event, | |
261 | void *data0, size_t size0, void *data1, size_t size1) | |
262 | { | |
263 | unsigned long flags; | |
264 | ||
265 | event->v[0].data = data0; | |
266 | event->v[0].size = size0; | |
267 | event->v[1].data = data1; | |
268 | event->v[1].size = size1; | |
269 | ||
270 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
271 | if (client->in_shutdown) |
272 | kfree(event); | |
273 | else | |
274 | list_add_tail(&event->link, &client->event_list); | |
19a15b93 | 275 | spin_unlock_irqrestore(&client->lock, flags); |
83431cba JF |
276 | |
277 | wake_up_interruptible(&client->wait); | |
19a15b93 KH |
278 | } |
279 | ||
53dca511 SR |
280 | static int dequeue_event(struct client *client, |
281 | char __user *buffer, size_t count) | |
19a15b93 | 282 | { |
19a15b93 KH |
283 | struct event *event; |
284 | size_t size, total; | |
2dbd7d7e | 285 | int i, ret; |
19a15b93 | 286 | |
2dbd7d7e SR |
287 | ret = wait_event_interruptible(client->wait, |
288 | !list_empty(&client->event_list) || | |
289 | fw_device_is_shutdown(client->device)); | |
290 | if (ret < 0) | |
291 | return ret; | |
19a15b93 | 292 | |
2603bf21 KH |
293 | if (list_empty(&client->event_list) && |
294 | fw_device_is_shutdown(client->device)) | |
295 | return -ENODEV; | |
19a15b93 | 296 | |
3ba94986 | 297 | spin_lock_irq(&client->lock); |
a459b8ab | 298 | event = list_first_entry(&client->event_list, struct event, link); |
19a15b93 | 299 | list_del(&event->link); |
3ba94986 | 300 | spin_unlock_irq(&client->lock); |
19a15b93 | 301 | |
19a15b93 KH |
302 | total = 0; |
303 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
304 | size = min(event->v[i].size, count - total); | |
2603bf21 | 305 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
2dbd7d7e | 306 | ret = -EFAULT; |
19a15b93 | 307 | goto out; |
2603bf21 | 308 | } |
19a15b93 KH |
309 | total += size; |
310 | } | |
2dbd7d7e | 311 | ret = total; |
19a15b93 KH |
312 | |
313 | out: | |
314 | kfree(event); | |
315 | ||
2dbd7d7e | 316 | return ret; |
19a15b93 KH |
317 | } |
318 | ||
53dca511 SR |
319 | static ssize_t fw_device_op_read(struct file *file, char __user *buffer, |
320 | size_t count, loff_t *offset) | |
19a15b93 KH |
321 | { |
322 | struct client *client = file->private_data; | |
323 | ||
324 | return dequeue_event(client, buffer, count); | |
325 | } | |
326 | ||
53dca511 SR |
327 | static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, |
328 | struct client *client) | |
344bbc4d | 329 | { |
da8ecffa | 330 | struct fw_card *card = client->device->card; |
cf417e54 | 331 | |
3ba94986 | 332 | spin_lock_irq(&card->lock); |
344bbc4d | 333 | |
da8ecffa | 334 | event->closure = client->bus_reset_closure; |
344bbc4d | 335 | event->type = FW_CDEV_EVENT_BUS_RESET; |
cf5a56ac | 336 | event->generation = client->device->generation; |
da8ecffa | 337 | event->node_id = client->device->node_id; |
344bbc4d | 338 | event->local_node_id = card->local_node->node_id; |
250b2b6d | 339 | event->bm_node_id = card->bm_node_id; |
344bbc4d KH |
340 | event->irm_node_id = card->irm_node->node_id; |
341 | event->root_node_id = card->root_node->node_id; | |
cf417e54 | 342 | |
3ba94986 | 343 | spin_unlock_irq(&card->lock); |
344bbc4d KH |
344 | } |
345 | ||
53dca511 SR |
346 | static void for_each_client(struct fw_device *device, |
347 | void (*callback)(struct client *client)) | |
2603bf21 | 348 | { |
2603bf21 | 349 | struct client *c; |
2603bf21 | 350 | |
d67cfb96 | 351 | mutex_lock(&device->client_list_mutex); |
2603bf21 KH |
352 | list_for_each_entry(c, &device->client_list, link) |
353 | callback(c); | |
d67cfb96 | 354 | mutex_unlock(&device->client_list_mutex); |
2603bf21 KH |
355 | } |
356 | ||
b1bda4cd JFSR |
357 | static int schedule_reallocations(int id, void *p, void *data) |
358 | { | |
9fb551bf | 359 | schedule_if_iso_resource(p); |
b1bda4cd | 360 | |
b1bda4cd JFSR |
361 | return 0; |
362 | } | |
363 | ||
53dca511 | 364 | static void queue_bus_reset_event(struct client *client) |
97bd9efa | 365 | { |
97c18b7f | 366 | struct bus_reset_event *e; |
97bd9efa | 367 | |
97c18b7f SR |
368 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
369 | if (e == NULL) { | |
bf54e146 | 370 | fw_notify("Out of memory when allocating event\n"); |
97bd9efa KH |
371 | return; |
372 | } | |
373 | ||
97c18b7f | 374 | fill_bus_reset_event(&e->reset, client); |
97bd9efa | 375 | |
97c18b7f SR |
376 | queue_event(client, &e->event, |
377 | &e->reset, sizeof(e->reset), NULL, 0); | |
b1bda4cd JFSR |
378 | |
379 | spin_lock_irq(&client->lock); | |
380 | idr_for_each(&client->resource_idr, schedule_reallocations, client); | |
381 | spin_unlock_irq(&client->lock); | |
97bd9efa KH |
382 | } |
383 | ||
384 | void fw_device_cdev_update(struct fw_device *device) | |
385 | { | |
2603bf21 KH |
386 | for_each_client(device, queue_bus_reset_event); |
387 | } | |
97bd9efa | 388 | |
2603bf21 KH |
389 | static void wake_up_client(struct client *client) |
390 | { | |
391 | wake_up_interruptible(&client->wait); | |
392 | } | |
97bd9efa | 393 | |
2603bf21 KH |
394 | void fw_device_cdev_remove(struct fw_device *device) |
395 | { | |
396 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
397 | } |
398 | ||
6e95dea7 SR |
399 | union ioctl_arg { |
400 | struct fw_cdev_get_info get_info; | |
401 | struct fw_cdev_send_request send_request; | |
402 | struct fw_cdev_allocate allocate; | |
403 | struct fw_cdev_deallocate deallocate; | |
404 | struct fw_cdev_send_response send_response; | |
405 | struct fw_cdev_initiate_bus_reset initiate_bus_reset; | |
406 | struct fw_cdev_add_descriptor add_descriptor; | |
407 | struct fw_cdev_remove_descriptor remove_descriptor; | |
408 | struct fw_cdev_create_iso_context create_iso_context; | |
409 | struct fw_cdev_queue_iso queue_iso; | |
410 | struct fw_cdev_start_iso start_iso; | |
411 | struct fw_cdev_stop_iso stop_iso; | |
412 | struct fw_cdev_get_cycle_timer get_cycle_timer; | |
413 | struct fw_cdev_allocate_iso_resource allocate_iso_resource; | |
414 | struct fw_cdev_send_stream_packet send_stream_packet; | |
415 | struct fw_cdev_get_cycle_timer2 get_cycle_timer2; | |
850bb6f2 | 416 | struct fw_cdev_send_phy_packet send_phy_packet; |
bf54e146 | 417 | struct fw_cdev_receive_phy_packets receive_phy_packets; |
6e95dea7 SR |
418 | }; |
419 | ||
420 | static int ioctl_get_info(struct client *client, union ioctl_arg *arg) | |
19a15b93 | 421 | { |
6e95dea7 | 422 | struct fw_cdev_get_info *a = &arg->get_info; |
344bbc4d | 423 | struct fw_cdev_event_bus_reset bus_reset; |
c9755e14 | 424 | unsigned long ret = 0; |
344bbc4d | 425 | |
6e95dea7 | 426 | client->version = a->version; |
604f4516 | 427 | a->version = FW_CDEV_KERNEL_VERSION; |
6e95dea7 | 428 | a->card = client->device->card->index; |
344bbc4d | 429 | |
c9755e14 SR |
430 | down_read(&fw_device_rwsem); |
431 | ||
6e95dea7 SR |
432 | if (a->rom != 0) { |
433 | size_t want = a->rom_length; | |
d84702a5 | 434 | size_t have = client->device->config_rom_length * 4; |
344bbc4d | 435 | |
6e95dea7 SR |
436 | ret = copy_to_user(u64_to_uptr(a->rom), |
437 | client->device->config_rom, min(want, have)); | |
344bbc4d | 438 | } |
6e95dea7 | 439 | a->rom_length = client->device->config_rom_length * 4; |
344bbc4d | 440 | |
c9755e14 SR |
441 | up_read(&fw_device_rwsem); |
442 | ||
443 | if (ret != 0) | |
444 | return -EFAULT; | |
445 | ||
6e95dea7 SR |
446 | client->bus_reset_closure = a->bus_reset_closure; |
447 | if (a->bus_reset != 0) { | |
da8ecffa | 448 | fill_bus_reset_event(&bus_reset, client); |
6e95dea7 SR |
449 | if (copy_to_user(u64_to_uptr(a->bus_reset), |
450 | &bus_reset, sizeof(bus_reset))) | |
344bbc4d KH |
451 | return -EFAULT; |
452 | } | |
19a15b93 | 453 | |
19a15b93 KH |
454 | return 0; |
455 | } | |
456 | ||
53dca511 SR |
457 | static int add_client_resource(struct client *client, |
458 | struct client_resource *resource, gfp_t gfp_mask) | |
3964a449 KH |
459 | { |
460 | unsigned long flags; | |
45ee3199 JF |
461 | int ret; |
462 | ||
463 | retry: | |
464 | if (idr_pre_get(&client->resource_idr, gfp_mask) == 0) | |
465 | return -ENOMEM; | |
3964a449 KH |
466 | |
467 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
468 | if (client->in_shutdown) |
469 | ret = -ECANCELED; | |
470 | else | |
471 | ret = idr_get_new(&client->resource_idr, resource, | |
472 | &resource->handle); | |
b1bda4cd | 473 | if (ret >= 0) { |
fb443036 | 474 | client_get(client); |
9fb551bf | 475 | schedule_if_iso_resource(resource); |
b1bda4cd | 476 | } |
3964a449 | 477 | spin_unlock_irqrestore(&client->lock, flags); |
45ee3199 JF |
478 | |
479 | if (ret == -EAGAIN) | |
480 | goto retry; | |
481 | ||
482 | return ret < 0 ? ret : 0; | |
3964a449 KH |
483 | } |
484 | ||
53dca511 SR |
485 | static int release_client_resource(struct client *client, u32 handle, |
486 | client_resource_release_fn_t release, | |
e21fcf79 | 487 | struct client_resource **return_resource) |
3964a449 | 488 | { |
e21fcf79 | 489 | struct client_resource *resource; |
3964a449 | 490 | |
3ba94986 | 491 | spin_lock_irq(&client->lock); |
45ee3199 | 492 | if (client->in_shutdown) |
e21fcf79 | 493 | resource = NULL; |
45ee3199 | 494 | else |
e21fcf79 SR |
495 | resource = idr_find(&client->resource_idr, handle); |
496 | if (resource && resource->release == release) | |
45ee3199 | 497 | idr_remove(&client->resource_idr, handle); |
3ba94986 | 498 | spin_unlock_irq(&client->lock); |
3964a449 | 499 | |
e21fcf79 | 500 | if (!(resource && resource->release == release)) |
3964a449 KH |
501 | return -EINVAL; |
502 | ||
e21fcf79 SR |
503 | if (return_resource) |
504 | *return_resource = resource; | |
3964a449 | 505 | else |
e21fcf79 | 506 | resource->release(client, resource); |
3964a449 | 507 | |
fb443036 SR |
508 | client_put(client); |
509 | ||
3964a449 KH |
510 | return 0; |
511 | } | |
512 | ||
53dca511 SR |
513 | static void release_transaction(struct client *client, |
514 | struct client_resource *resource) | |
3964a449 | 515 | { |
97c18b7f SR |
516 | struct outbound_transaction_resource *r = container_of(resource, |
517 | struct outbound_transaction_resource, resource); | |
3964a449 | 518 | |
97c18b7f | 519 | fw_cancel_transaction(client->device->card, &r->transaction); |
3964a449 KH |
520 | } |
521 | ||
53dca511 SR |
522 | static void complete_transaction(struct fw_card *card, int rcode, |
523 | void *payload, size_t length, void *data) | |
19a15b93 | 524 | { |
97c18b7f SR |
525 | struct outbound_transaction_event *e = data; |
526 | struct fw_cdev_event_response *rsp = &e->response; | |
527 | struct client *client = e->client; | |
28cf6a04 | 528 | unsigned long flags; |
19a15b93 | 529 | |
97c18b7f SR |
530 | if (length < rsp->length) |
531 | rsp->length = length; | |
19a15b93 | 532 | if (rcode == RCODE_COMPLETE) |
97c18b7f | 533 | memcpy(rsp->data, payload, rsp->length); |
19a15b93 | 534 | |
28cf6a04 | 535 | spin_lock_irqsave(&client->lock, flags); |
45ee3199 | 536 | /* |
fb443036 SR |
537 | * 1. If called while in shutdown, the idr tree must be left untouched. |
538 | * The idr handle will be removed and the client reference will be | |
539 | * dropped later. | |
540 | * 2. If the call chain was release_client_resource -> | |
541 | * release_transaction -> complete_transaction (instead of a normal | |
542 | * conclusion of the transaction), i.e. if this resource was already | |
543 | * unregistered from the idr, the client reference will be dropped | |
544 | * by release_client_resource and we must not drop it here. | |
45ee3199 | 545 | */ |
fb443036 | 546 | if (!client->in_shutdown && |
97c18b7f SR |
547 | idr_find(&client->resource_idr, e->r.resource.handle)) { |
548 | idr_remove(&client->resource_idr, e->r.resource.handle); | |
fb443036 SR |
549 | /* Drop the idr's reference */ |
550 | client_put(client); | |
551 | } | |
28cf6a04 KH |
552 | spin_unlock_irqrestore(&client->lock, flags); |
553 | ||
97c18b7f SR |
554 | rsp->type = FW_CDEV_EVENT_RESPONSE; |
555 | rsp->rcode = rcode; | |
8401d92b DM |
556 | |
557 | /* | |
97c18b7f | 558 | * In the case that sizeof(*rsp) doesn't align with the position of the |
8401d92b DM |
559 | * data, and the read is short, preserve an extra copy of the data |
560 | * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless | |
561 | * for short reads and some apps depended on it, this is both safe | |
562 | * and prudent for compatibility. | |
563 | */ | |
97c18b7f SR |
564 | if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data)) |
565 | queue_event(client, &e->event, rsp, sizeof(*rsp), | |
566 | rsp->data, rsp->length); | |
8401d92b | 567 | else |
97c18b7f | 568 | queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length, |
8401d92b | 569 | NULL, 0); |
fb443036 SR |
570 | |
571 | /* Drop the transaction callback's reference */ | |
572 | client_put(client); | |
19a15b93 KH |
573 | } |
574 | ||
acfe8333 JFSR |
575 | static int init_request(struct client *client, |
576 | struct fw_cdev_send_request *request, | |
577 | int destination_id, int speed) | |
19a15b93 | 578 | { |
97c18b7f | 579 | struct outbound_transaction_event *e; |
1f3125af | 580 | int ret; |
19a15b93 | 581 | |
18e9b10f SR |
582 | if (request->tcode != TCODE_STREAM_DATA && |
583 | (request->length > 4096 || request->length > 512 << speed)) | |
5d3fd692 | 584 | return -EIO; |
19a15b93 | 585 | |
a8e93f3d CL |
586 | if (request->tcode == TCODE_WRITE_QUADLET_REQUEST && |
587 | request->length < 4) | |
588 | return -EINVAL; | |
589 | ||
97c18b7f SR |
590 | e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL); |
591 | if (e == NULL) | |
19a15b93 KH |
592 | return -ENOMEM; |
593 | ||
97c18b7f SR |
594 | e->client = client; |
595 | e->response.length = request->length; | |
596 | e->response.closure = request->closure; | |
19a15b93 | 597 | |
4f259223 | 598 | if (request->data && |
97c18b7f | 599 | copy_from_user(e->response.data, |
4f259223 | 600 | u64_to_uptr(request->data), request->length)) { |
1f3125af | 601 | ret = -EFAULT; |
45ee3199 | 602 | goto failed; |
1f3125af SR |
603 | } |
604 | ||
97c18b7f SR |
605 | e->r.resource.release = release_transaction; |
606 | ret = add_client_resource(client, &e->r.resource, GFP_KERNEL); | |
45ee3199 JF |
607 | if (ret < 0) |
608 | goto failed; | |
28cf6a04 | 609 | |
fb443036 SR |
610 | /* Get a reference for the transaction callback */ |
611 | client_get(client); | |
612 | ||
acfe8333 | 613 | fw_send_request(client->device->card, &e->r.transaction, |
664d8010 SR |
614 | request->tcode, destination_id, request->generation, |
615 | speed, request->offset, e->response.data, | |
616 | request->length, complete_transaction, e); | |
617 | return 0; | |
19a15b93 | 618 | |
45ee3199 | 619 | failed: |
97c18b7f | 620 | kfree(e); |
1f3125af SR |
621 | |
622 | return ret; | |
19a15b93 KH |
623 | } |
624 | ||
6e95dea7 | 625 | static int ioctl_send_request(struct client *client, union ioctl_arg *arg) |
acfe8333 | 626 | { |
6e95dea7 | 627 | switch (arg->send_request.tcode) { |
acfe8333 JFSR |
628 | case TCODE_WRITE_QUADLET_REQUEST: |
629 | case TCODE_WRITE_BLOCK_REQUEST: | |
630 | case TCODE_READ_QUADLET_REQUEST: | |
631 | case TCODE_READ_BLOCK_REQUEST: | |
632 | case TCODE_LOCK_MASK_SWAP: | |
633 | case TCODE_LOCK_COMPARE_SWAP: | |
634 | case TCODE_LOCK_FETCH_ADD: | |
635 | case TCODE_LOCK_LITTLE_ADD: | |
636 | case TCODE_LOCK_BOUNDED_ADD: | |
637 | case TCODE_LOCK_WRAP_ADD: | |
638 | case TCODE_LOCK_VENDOR_DEPENDENT: | |
639 | break; | |
640 | default: | |
641 | return -EINVAL; | |
642 | } | |
643 | ||
6e95dea7 | 644 | return init_request(client, &arg->send_request, client->device->node_id, |
acfe8333 JFSR |
645 | client->device->max_speed); |
646 | } | |
647 | ||
281e2032 SR |
648 | static inline bool is_fcp_request(struct fw_request *request) |
649 | { | |
650 | return request == NULL; | |
651 | } | |
652 | ||
53dca511 SR |
653 | static void release_request(struct client *client, |
654 | struct client_resource *resource) | |
3964a449 | 655 | { |
97c18b7f SR |
656 | struct inbound_transaction_resource *r = container_of(resource, |
657 | struct inbound_transaction_resource, resource); | |
3964a449 | 658 | |
281e2032 SR |
659 | if (is_fcp_request(r->request)) |
660 | kfree(r->data); | |
661 | else | |
08bd34c9 | 662 | fw_send_response(r->card, r->request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
663 | |
664 | fw_card_put(r->card); | |
97c18b7f | 665 | kfree(r); |
3964a449 KH |
666 | } |
667 | ||
97c18b7f | 668 | static void handle_request(struct fw_card *card, struct fw_request *request, |
53dca511 | 669 | int tcode, int destination, int source, |
33e553fe | 670 | int generation, unsigned long long offset, |
53dca511 | 671 | void *payload, size_t length, void *callback_data) |
19a15b93 | 672 | { |
97c18b7f SR |
673 | struct address_handler_resource *handler = callback_data; |
674 | struct inbound_transaction_resource *r; | |
675 | struct inbound_transaction_event *e; | |
e205597d | 676 | size_t event_size0; |
281e2032 | 677 | void *fcp_frame = NULL; |
45ee3199 | 678 | int ret; |
19a15b93 | 679 | |
0244f573 SR |
680 | /* card may be different from handler->client->device->card */ |
681 | fw_card_get(card); | |
682 | ||
97c18b7f | 683 | r = kmalloc(sizeof(*r), GFP_ATOMIC); |
2d826cc5 | 684 | e = kmalloc(sizeof(*e), GFP_ATOMIC); |
bf54e146 SR |
685 | if (r == NULL || e == NULL) { |
686 | fw_notify("Out of memory when allocating event\n"); | |
45ee3199 | 687 | goto failed; |
bf54e146 | 688 | } |
08bd34c9 | 689 | r->card = card; |
97c18b7f SR |
690 | r->request = request; |
691 | r->data = payload; | |
692 | r->length = length; | |
19a15b93 | 693 | |
281e2032 SR |
694 | if (is_fcp_request(request)) { |
695 | /* | |
696 | * FIXME: Let core-transaction.c manage a | |
697 | * single reference-counted copy? | |
698 | */ | |
699 | fcp_frame = kmemdup(payload, length, GFP_ATOMIC); | |
700 | if (fcp_frame == NULL) | |
701 | goto failed; | |
702 | ||
703 | r->data = fcp_frame; | |
704 | } | |
705 | ||
97c18b7f SR |
706 | r->resource.release = release_request; |
707 | ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC); | |
45ee3199 JF |
708 | if (ret < 0) |
709 | goto failed; | |
19a15b93 | 710 | |
e205597d SR |
711 | if (handler->client->version < FW_CDEV_VERSION_EVENT_REQUEST2) { |
712 | struct fw_cdev_event_request *req = &e->req.request; | |
713 | ||
714 | if (tcode & 0x10) | |
715 | tcode = TCODE_LOCK_REQUEST; | |
716 | ||
717 | req->type = FW_CDEV_EVENT_REQUEST; | |
718 | req->tcode = tcode; | |
719 | req->offset = offset; | |
720 | req->length = length; | |
721 | req->handle = r->resource.handle; | |
722 | req->closure = handler->closure; | |
723 | event_size0 = sizeof(*req); | |
724 | } else { | |
725 | struct fw_cdev_event_request2 *req = &e->req.request2; | |
726 | ||
727 | req->type = FW_CDEV_EVENT_REQUEST2; | |
728 | req->tcode = tcode; | |
729 | req->offset = offset; | |
730 | req->source_node_id = source; | |
731 | req->destination_node_id = destination; | |
732 | req->card = card->index; | |
733 | req->generation = generation; | |
734 | req->length = length; | |
735 | req->handle = r->resource.handle; | |
736 | req->closure = handler->closure; | |
737 | event_size0 = sizeof(*req); | |
738 | } | |
19a15b93 | 739 | |
97c18b7f | 740 | queue_event(handler->client, &e->event, |
e205597d | 741 | &e->req, event_size0, r->data, length); |
45ee3199 JF |
742 | return; |
743 | ||
744 | failed: | |
97c18b7f | 745 | kfree(r); |
45ee3199 | 746 | kfree(e); |
281e2032 SR |
747 | kfree(fcp_frame); |
748 | ||
749 | if (!is_fcp_request(request)) | |
db5d247a | 750 | fw_send_response(card, request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
751 | |
752 | fw_card_put(card); | |
19a15b93 KH |
753 | } |
754 | ||
53dca511 SR |
755 | static void release_address_handler(struct client *client, |
756 | struct client_resource *resource) | |
3964a449 | 757 | { |
97c18b7f SR |
758 | struct address_handler_resource *r = |
759 | container_of(resource, struct address_handler_resource, resource); | |
3964a449 | 760 | |
97c18b7f SR |
761 | fw_core_remove_address_handler(&r->handler); |
762 | kfree(r); | |
3964a449 KH |
763 | } |
764 | ||
6e95dea7 | 765 | static int ioctl_allocate(struct client *client, union ioctl_arg *arg) |
19a15b93 | 766 | { |
6e95dea7 | 767 | struct fw_cdev_allocate *a = &arg->allocate; |
97c18b7f | 768 | struct address_handler_resource *r; |
19a15b93 | 769 | struct fw_address_region region; |
45ee3199 | 770 | int ret; |
19a15b93 | 771 | |
97c18b7f SR |
772 | r = kmalloc(sizeof(*r), GFP_KERNEL); |
773 | if (r == NULL) | |
19a15b93 KH |
774 | return -ENOMEM; |
775 | ||
6e95dea7 | 776 | region.start = a->offset; |
8e2b2b46 SR |
777 | if (client->version < FW_CDEV_VERSION_ALLOCATE_REGION_END) |
778 | region.end = a->offset + a->length; | |
779 | else | |
780 | region.end = a->region_end; | |
781 | ||
6e95dea7 | 782 | r->handler.length = a->length; |
97c18b7f | 783 | r->handler.address_callback = handle_request; |
6e95dea7 SR |
784 | r->handler.callback_data = r; |
785 | r->closure = a->closure; | |
786 | r->client = client; | |
19a15b93 | 787 | |
97c18b7f | 788 | ret = fw_core_add_address_handler(&r->handler, ®ion); |
3e0b5f0d | 789 | if (ret < 0) { |
97c18b7f | 790 | kfree(r); |
3e0b5f0d | 791 | return ret; |
19a15b93 | 792 | } |
8e2b2b46 | 793 | a->offset = r->handler.offset; |
19a15b93 | 794 | |
97c18b7f SR |
795 | r->resource.release = release_address_handler; |
796 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 797 | if (ret < 0) { |
97c18b7f | 798 | release_address_handler(client, &r->resource); |
45ee3199 JF |
799 | return ret; |
800 | } | |
6e95dea7 | 801 | a->handle = r->resource.handle; |
19a15b93 KH |
802 | |
803 | return 0; | |
804 | } | |
805 | ||
6e95dea7 | 806 | static int ioctl_deallocate(struct client *client, union ioctl_arg *arg) |
9472316b | 807 | { |
6e95dea7 | 808 | return release_client_resource(client, arg->deallocate.handle, |
45ee3199 | 809 | release_address_handler, NULL); |
9472316b KH |
810 | } |
811 | ||
6e95dea7 | 812 | static int ioctl_send_response(struct client *client, union ioctl_arg *arg) |
19a15b93 | 813 | { |
6e95dea7 | 814 | struct fw_cdev_send_response *a = &arg->send_response; |
3964a449 | 815 | struct client_resource *resource; |
97c18b7f | 816 | struct inbound_transaction_resource *r; |
7e44c0b5 | 817 | int ret = 0; |
19a15b93 | 818 | |
6e95dea7 | 819 | if (release_client_resource(client, a->handle, |
45ee3199 | 820 | release_request, &resource) < 0) |
19a15b93 | 821 | return -EINVAL; |
45ee3199 | 822 | |
97c18b7f SR |
823 | r = container_of(resource, struct inbound_transaction_resource, |
824 | resource); | |
281e2032 SR |
825 | if (is_fcp_request(r->request)) |
826 | goto out; | |
827 | ||
a10c0ce7 CL |
828 | if (a->length != fw_get_response_length(r->request)) { |
829 | ret = -EINVAL; | |
830 | kfree(r->request); | |
831 | goto out; | |
832 | } | |
833 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length)) { | |
281e2032 SR |
834 | ret = -EFAULT; |
835 | kfree(r->request); | |
836 | goto out; | |
7e44c0b5 | 837 | } |
08bd34c9 | 838 | fw_send_response(r->card, r->request, a->rcode); |
7e44c0b5 | 839 | out: |
0244f573 | 840 | fw_card_put(r->card); |
19a15b93 KH |
841 | kfree(r); |
842 | ||
7e44c0b5 | 843 | return ret; |
19a15b93 KH |
844 | } |
845 | ||
6e95dea7 | 846 | static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg) |
5371842b | 847 | { |
02d37bed | 848 | fw_schedule_bus_reset(client->device->card, true, |
6e95dea7 | 849 | arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET); |
02d37bed | 850 | return 0; |
5371842b KH |
851 | } |
852 | ||
3964a449 KH |
853 | static void release_descriptor(struct client *client, |
854 | struct client_resource *resource) | |
855 | { | |
97c18b7f SR |
856 | struct descriptor_resource *r = |
857 | container_of(resource, struct descriptor_resource, resource); | |
3964a449 | 858 | |
97c18b7f SR |
859 | fw_core_remove_descriptor(&r->descriptor); |
860 | kfree(r); | |
3964a449 KH |
861 | } |
862 | ||
6e95dea7 | 863 | static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 864 | { |
6e95dea7 | 865 | struct fw_cdev_add_descriptor *a = &arg->add_descriptor; |
97c18b7f | 866 | struct descriptor_resource *r; |
45ee3199 | 867 | int ret; |
66dea3e5 | 868 | |
de487da8 | 869 | /* Access policy: Allow this ioctl only on local nodes' device files. */ |
92368890 | 870 | if (!client->device->is_local) |
de487da8 SR |
871 | return -ENOSYS; |
872 | ||
6e95dea7 | 873 | if (a->length > 256) |
66dea3e5 KH |
874 | return -EINVAL; |
875 | ||
6e95dea7 | 876 | r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL); |
97c18b7f | 877 | if (r == NULL) |
66dea3e5 KH |
878 | return -ENOMEM; |
879 | ||
6e95dea7 | 880 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) { |
45ee3199 JF |
881 | ret = -EFAULT; |
882 | goto failed; | |
66dea3e5 KH |
883 | } |
884 | ||
6e95dea7 SR |
885 | r->descriptor.length = a->length; |
886 | r->descriptor.immediate = a->immediate; | |
887 | r->descriptor.key = a->key; | |
97c18b7f | 888 | r->descriptor.data = r->data; |
66dea3e5 | 889 | |
97c18b7f | 890 | ret = fw_core_add_descriptor(&r->descriptor); |
45ee3199 JF |
891 | if (ret < 0) |
892 | goto failed; | |
66dea3e5 | 893 | |
97c18b7f SR |
894 | r->resource.release = release_descriptor; |
895 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 896 | if (ret < 0) { |
97c18b7f | 897 | fw_core_remove_descriptor(&r->descriptor); |
45ee3199 JF |
898 | goto failed; |
899 | } | |
6e95dea7 | 900 | a->handle = r->resource.handle; |
66dea3e5 KH |
901 | |
902 | return 0; | |
45ee3199 | 903 | failed: |
97c18b7f | 904 | kfree(r); |
45ee3199 JF |
905 | |
906 | return ret; | |
66dea3e5 KH |
907 | } |
908 | ||
6e95dea7 | 909 | static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 910 | { |
6e95dea7 | 911 | return release_client_resource(client, arg->remove_descriptor.handle, |
45ee3199 | 912 | release_descriptor, NULL); |
66dea3e5 KH |
913 | } |
914 | ||
53dca511 SR |
915 | static void iso_callback(struct fw_iso_context *context, u32 cycle, |
916 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
917 | { |
918 | struct client *client = data; | |
97c18b7f | 919 | struct iso_interrupt_event *e; |
19a15b93 | 920 | |
56d04cb1 | 921 | e = kmalloc(sizeof(*e) + header_length, GFP_ATOMIC); |
bf54e146 SR |
922 | if (e == NULL) { |
923 | fw_notify("Out of memory when allocating event\n"); | |
19a15b93 | 924 | return; |
bf54e146 | 925 | } |
97c18b7f SR |
926 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
927 | e->interrupt.closure = client->iso_closure; | |
928 | e->interrupt.cycle = cycle; | |
929 | e->interrupt.header_length = header_length; | |
930 | memcpy(e->interrupt.header, header, header_length); | |
931 | queue_event(client, &e->event, &e->interrupt, | |
932 | sizeof(e->interrupt) + header_length, NULL, 0); | |
19a15b93 KH |
933 | } |
934 | ||
6e95dea7 | 935 | static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) |
19a15b93 | 936 | { |
6e95dea7 | 937 | struct fw_cdev_create_iso_context *a = &arg->create_iso_context; |
24315c5e | 938 | struct fw_iso_context *context; |
19a15b93 | 939 | |
eb5b35a5 SR |
940 | BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT != FW_ISO_CONTEXT_TRANSMIT || |
941 | FW_CDEV_ISO_CONTEXT_RECEIVE != FW_ISO_CONTEXT_RECEIVE); | |
942 | ||
6e95dea7 | 943 | if (a->channel > 63) |
21efb3cf KH |
944 | return -EINVAL; |
945 | ||
6e95dea7 | 946 | switch (a->type) { |
c70dc788 | 947 | case FW_ISO_CONTEXT_RECEIVE: |
6e95dea7 | 948 | if (a->header_size < 4 || (a->header_size & 3)) |
c70dc788 | 949 | return -EINVAL; |
c70dc788 KH |
950 | break; |
951 | ||
952 | case FW_ISO_CONTEXT_TRANSMIT: | |
6e95dea7 | 953 | if (a->speed > SCODE_3200) |
c70dc788 | 954 | return -EINVAL; |
c70dc788 KH |
955 | break; |
956 | ||
957 | default: | |
21efb3cf | 958 | return -EINVAL; |
c70dc788 KH |
959 | } |
960 | ||
6e95dea7 SR |
961 | context = fw_iso_context_create(client->device->card, a->type, |
962 | a->channel, a->speed, a->header_size, | |
963 | iso_callback, client); | |
24315c5e KH |
964 | if (IS_ERR(context)) |
965 | return PTR_ERR(context); | |
966 | ||
bdfe273e CL |
967 | /* We only support one context at this time. */ |
968 | spin_lock_irq(&client->lock); | |
969 | if (client->iso_context != NULL) { | |
970 | spin_unlock_irq(&client->lock); | |
971 | fw_iso_context_destroy(context); | |
972 | return -EBUSY; | |
973 | } | |
6e95dea7 | 974 | client->iso_closure = a->closure; |
24315c5e | 975 | client->iso_context = context; |
bdfe273e | 976 | spin_unlock_irq(&client->lock); |
19a15b93 | 977 | |
6e95dea7 | 978 | a->handle = 0; |
abaa5743 | 979 | |
19a15b93 KH |
980 | return 0; |
981 | } | |
982 | ||
1ca31ae7 KH |
983 | /* Macros for decoding the iso packet control header. */ |
984 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) | |
985 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) | |
986 | #define GET_SKIP(v) (((v) >> 17) & 0x01) | |
7a100344 SR |
987 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
988 | #define GET_SY(v) (((v) >> 20) & 0x0f) | |
1ca31ae7 KH |
989 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
990 | ||
6e95dea7 | 991 | static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 992 | { |
6e95dea7 | 993 | struct fw_cdev_queue_iso *a = &arg->queue_iso; |
19a15b93 | 994 | struct fw_cdev_iso_packet __user *p, *end, *next; |
9b32d5f3 | 995 | struct fw_iso_context *ctx = client->iso_context; |
ef370ee7 | 996 | unsigned long payload, buffer_end, header_length; |
1ca31ae7 | 997 | u32 control; |
19a15b93 KH |
998 | int count; |
999 | struct { | |
1000 | struct fw_iso_packet packet; | |
1001 | u8 header[256]; | |
1002 | } u; | |
1003 | ||
6e95dea7 | 1004 | if (ctx == NULL || a->handle != 0) |
19a15b93 | 1005 | return -EINVAL; |
19a15b93 | 1006 | |
c781c06d KH |
1007 | /* |
1008 | * If the user passes a non-NULL data pointer, has mmap()'ed | |
19a15b93 KH |
1009 | * the iso buffer, and the pointer points inside the buffer, |
1010 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 1011 | * set them both to 0, which will still let packets with |
19a15b93 KH |
1012 | * payload_length == 0 through. In other words, if no packets |
1013 | * use the indirect payload, the iso buffer need not be mapped | |
6e95dea7 | 1014 | * and the a->data pointer is ignored. |
c781c06d | 1015 | */ |
19a15b93 | 1016 | |
6e95dea7 | 1017 | payload = (unsigned long)a->data - client->vm_start; |
ef370ee7 | 1018 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
6e95dea7 | 1019 | if (a->data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 1020 | payload >= buffer_end) { |
9aad8125 | 1021 | payload = 0; |
ef370ee7 | 1022 | buffer_end = 0; |
19a15b93 KH |
1023 | } |
1024 | ||
6e95dea7 | 1025 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets); |
1ccc9147 | 1026 | |
6e95dea7 | 1027 | if (!access_ok(VERIFY_READ, p, a->size)) |
19a15b93 KH |
1028 | return -EFAULT; |
1029 | ||
6e95dea7 | 1030 | end = (void __user *)p + a->size; |
19a15b93 KH |
1031 | count = 0; |
1032 | while (p < end) { | |
1ca31ae7 | 1033 | if (get_user(control, &p->control)) |
19a15b93 | 1034 | return -EFAULT; |
1ca31ae7 KH |
1035 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
1036 | u.packet.interrupt = GET_INTERRUPT(control); | |
1037 | u.packet.skip = GET_SKIP(control); | |
1038 | u.packet.tag = GET_TAG(control); | |
1039 | u.packet.sy = GET_SY(control); | |
1040 | u.packet.header_length = GET_HEADER_LENGTH(control); | |
295e3feb | 1041 | |
9b32d5f3 | 1042 | if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) { |
385ab5bc CL |
1043 | if (u.packet.header_length % 4 != 0) |
1044 | return -EINVAL; | |
295e3feb KH |
1045 | header_length = u.packet.header_length; |
1046 | } else { | |
c781c06d KH |
1047 | /* |
1048 | * We require that header_length is a multiple of | |
1049 | * the fixed header size, ctx->header_size. | |
1050 | */ | |
69e61d0c SR |
1051 | if (u.packet.header_length == 0 || |
1052 | u.packet.header_length % ctx->header_size != 0) | |
295e3feb KH |
1053 | return -EINVAL; |
1054 | header_length = 0; | |
1055 | } | |
1056 | ||
19a15b93 | 1057 | next = (struct fw_cdev_iso_packet __user *) |
295e3feb | 1058 | &p->header[header_length / 4]; |
19a15b93 KH |
1059 | if (next > end) |
1060 | return -EINVAL; | |
1061 | if (__copy_from_user | |
295e3feb | 1062 | (u.packet.header, p->header, header_length)) |
19a15b93 | 1063 | return -EFAULT; |
98b6cbe8 | 1064 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
1065 | u.packet.header_length + u.packet.payload_length > 0) |
1066 | return -EINVAL; | |
ef370ee7 | 1067 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
1068 | return -EINVAL; |
1069 | ||
9b32d5f3 KH |
1070 | if (fw_iso_context_queue(ctx, &u.packet, |
1071 | &client->buffer, payload)) | |
19a15b93 KH |
1072 | break; |
1073 | ||
1074 | p = next; | |
1075 | payload += u.packet.payload_length; | |
1076 | count++; | |
1077 | } | |
1078 | ||
6e95dea7 SR |
1079 | a->size -= uptr_to_u64(p) - a->packets; |
1080 | a->packets = uptr_to_u64(p); | |
1081 | a->data = client->vm_start + payload; | |
19a15b93 KH |
1082 | |
1083 | return count; | |
1084 | } | |
1085 | ||
6e95dea7 | 1086 | static int ioctl_start_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1087 | { |
6e95dea7 | 1088 | struct fw_cdev_start_iso *a = &arg->start_iso; |
19a15b93 | 1089 | |
eb5b35a5 SR |
1090 | BUILD_BUG_ON( |
1091 | FW_CDEV_ISO_CONTEXT_MATCH_TAG0 != FW_ISO_CONTEXT_MATCH_TAG0 || | |
1092 | FW_CDEV_ISO_CONTEXT_MATCH_TAG1 != FW_ISO_CONTEXT_MATCH_TAG1 || | |
1093 | FW_CDEV_ISO_CONTEXT_MATCH_TAG2 != FW_ISO_CONTEXT_MATCH_TAG2 || | |
1094 | FW_CDEV_ISO_CONTEXT_MATCH_TAG3 != FW_ISO_CONTEXT_MATCH_TAG3 || | |
1095 | FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS != FW_ISO_CONTEXT_MATCH_ALL_TAGS); | |
1096 | ||
6e95dea7 | 1097 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 | 1098 | return -EINVAL; |
fae60312 | 1099 | |
6e95dea7 SR |
1100 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE && |
1101 | (a->tags == 0 || a->tags > 15 || a->sync > 15)) | |
1102 | return -EINVAL; | |
eb0306ea | 1103 | |
6e95dea7 SR |
1104 | return fw_iso_context_start(client->iso_context, |
1105 | a->cycle, a->sync, a->tags); | |
19a15b93 KH |
1106 | } |
1107 | ||
6e95dea7 | 1108 | static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg) |
b8295668 | 1109 | { |
6e95dea7 | 1110 | struct fw_cdev_stop_iso *a = &arg->stop_iso; |
abaa5743 | 1111 | |
6e95dea7 | 1112 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 KH |
1113 | return -EINVAL; |
1114 | ||
b8295668 KH |
1115 | return fw_iso_context_stop(client->iso_context); |
1116 | } | |
1117 | ||
6e95dea7 | 1118 | static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg) |
a64408b9 | 1119 | { |
6e95dea7 | 1120 | struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2; |
a64408b9 | 1121 | struct fw_card *card = client->device->card; |
abfe5a01 | 1122 | struct timespec ts = {0, 0}; |
4a9bde9b | 1123 | u32 cycle_time; |
abfe5a01 | 1124 | int ret = 0; |
a64408b9 | 1125 | |
4a9bde9b | 1126 | local_irq_disable(); |
a64408b9 | 1127 | |
0fcff4e3 | 1128 | cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME); |
abfe5a01 | 1129 | |
6e95dea7 | 1130 | switch (a->clk_id) { |
abfe5a01 SR |
1131 | case CLOCK_REALTIME: getnstimeofday(&ts); break; |
1132 | case CLOCK_MONOTONIC: do_posix_clock_monotonic_gettime(&ts); break; | |
1133 | case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts); break; | |
1134 | default: | |
1135 | ret = -EINVAL; | |
1136 | } | |
a64408b9 | 1137 | |
4a9bde9b | 1138 | local_irq_enable(); |
a64408b9 | 1139 | |
6e95dea7 SR |
1140 | a->tv_sec = ts.tv_sec; |
1141 | a->tv_nsec = ts.tv_nsec; | |
1142 | a->cycle_timer = cycle_time; | |
abfe5a01 SR |
1143 | |
1144 | return ret; | |
1145 | } | |
1146 | ||
6e95dea7 | 1147 | static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg) |
abfe5a01 | 1148 | { |
6e95dea7 | 1149 | struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer; |
abfe5a01 SR |
1150 | struct fw_cdev_get_cycle_timer2 ct2; |
1151 | ||
1152 | ct2.clk_id = CLOCK_REALTIME; | |
6e95dea7 | 1153 | ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2); |
abfe5a01 | 1154 | |
6e95dea7 SR |
1155 | a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC; |
1156 | a->cycle_timer = ct2.cycle_timer; | |
4a9bde9b | 1157 | |
a64408b9 SR |
1158 | return 0; |
1159 | } | |
1160 | ||
b1bda4cd JFSR |
1161 | static void iso_resource_work(struct work_struct *work) |
1162 | { | |
1163 | struct iso_resource_event *e; | |
1164 | struct iso_resource *r = | |
1165 | container_of(work, struct iso_resource, work.work); | |
1166 | struct client *client = r->client; | |
1167 | int generation, channel, bandwidth, todo; | |
1168 | bool skip, free, success; | |
1169 | ||
1170 | spin_lock_irq(&client->lock); | |
1171 | generation = client->device->generation; | |
1172 | todo = r->todo; | |
1173 | /* Allow 1000ms grace period for other reallocations. */ | |
1174 | if (todo == ISO_RES_ALLOC && | |
1175 | time_is_after_jiffies(client->device->card->reset_jiffies + HZ)) { | |
9fb551bf | 1176 | schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3)); |
b1bda4cd JFSR |
1177 | skip = true; |
1178 | } else { | |
1179 | /* We could be called twice within the same generation. */ | |
1180 | skip = todo == ISO_RES_REALLOC && | |
1181 | r->generation == generation; | |
1182 | } | |
1ec3c026 SR |
1183 | free = todo == ISO_RES_DEALLOC || |
1184 | todo == ISO_RES_ALLOC_ONCE || | |
1185 | todo == ISO_RES_DEALLOC_ONCE; | |
b1bda4cd JFSR |
1186 | r->generation = generation; |
1187 | spin_unlock_irq(&client->lock); | |
1188 | ||
1189 | if (skip) | |
1190 | goto out; | |
1191 | ||
1192 | bandwidth = r->bandwidth; | |
1193 | ||
1194 | fw_iso_resource_manage(client->device->card, generation, | |
1195 | r->channels, &channel, &bandwidth, | |
1ec3c026 SR |
1196 | todo == ISO_RES_ALLOC || |
1197 | todo == ISO_RES_REALLOC || | |
6fdc0370 SR |
1198 | todo == ISO_RES_ALLOC_ONCE, |
1199 | r->transaction_data); | |
b1bda4cd JFSR |
1200 | /* |
1201 | * Is this generation outdated already? As long as this resource sticks | |
1202 | * in the idr, it will be scheduled again for a newer generation or at | |
1203 | * shutdown. | |
1204 | */ | |
1205 | if (channel == -EAGAIN && | |
1206 | (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC)) | |
1207 | goto out; | |
1208 | ||
1209 | success = channel >= 0 || bandwidth > 0; | |
1210 | ||
1211 | spin_lock_irq(&client->lock); | |
1212 | /* | |
1213 | * Transit from allocation to reallocation, except if the client | |
1214 | * requested deallocation in the meantime. | |
1215 | */ | |
1216 | if (r->todo == ISO_RES_ALLOC) | |
1217 | r->todo = ISO_RES_REALLOC; | |
1218 | /* | |
1219 | * Allocation or reallocation failure? Pull this resource out of the | |
1220 | * idr and prepare for deletion, unless the client is shutting down. | |
1221 | */ | |
1222 | if (r->todo == ISO_RES_REALLOC && !success && | |
1223 | !client->in_shutdown && | |
1224 | idr_find(&client->resource_idr, r->resource.handle)) { | |
1225 | idr_remove(&client->resource_idr, r->resource.handle); | |
1226 | client_put(client); | |
1227 | free = true; | |
1228 | } | |
1229 | spin_unlock_irq(&client->lock); | |
1230 | ||
1231 | if (todo == ISO_RES_ALLOC && channel >= 0) | |
5d9cb7d2 | 1232 | r->channels = 1ULL << channel; |
b1bda4cd JFSR |
1233 | |
1234 | if (todo == ISO_RES_REALLOC && success) | |
1235 | goto out; | |
1236 | ||
1ec3c026 | 1237 | if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) { |
b1bda4cd JFSR |
1238 | e = r->e_alloc; |
1239 | r->e_alloc = NULL; | |
1240 | } else { | |
1241 | e = r->e_dealloc; | |
1242 | r->e_dealloc = NULL; | |
1243 | } | |
e21fcf79 SR |
1244 | e->iso_resource.handle = r->resource.handle; |
1245 | e->iso_resource.channel = channel; | |
1246 | e->iso_resource.bandwidth = bandwidth; | |
b1bda4cd JFSR |
1247 | |
1248 | queue_event(client, &e->event, | |
e21fcf79 | 1249 | &e->iso_resource, sizeof(e->iso_resource), NULL, 0); |
b1bda4cd JFSR |
1250 | |
1251 | if (free) { | |
1252 | cancel_delayed_work(&r->work); | |
1253 | kfree(r->e_alloc); | |
1254 | kfree(r->e_dealloc); | |
1255 | kfree(r); | |
1256 | } | |
1257 | out: | |
1258 | client_put(client); | |
1259 | } | |
1260 | ||
b1bda4cd JFSR |
1261 | static void release_iso_resource(struct client *client, |
1262 | struct client_resource *resource) | |
1263 | { | |
1264 | struct iso_resource *r = | |
1265 | container_of(resource, struct iso_resource, resource); | |
1266 | ||
1267 | spin_lock_irq(&client->lock); | |
1268 | r->todo = ISO_RES_DEALLOC; | |
9fb551bf | 1269 | schedule_iso_resource(r, 0); |
b1bda4cd JFSR |
1270 | spin_unlock_irq(&client->lock); |
1271 | } | |
1272 | ||
1ec3c026 SR |
1273 | static int init_iso_resource(struct client *client, |
1274 | struct fw_cdev_allocate_iso_resource *request, int todo) | |
b1bda4cd | 1275 | { |
b1bda4cd JFSR |
1276 | struct iso_resource_event *e1, *e2; |
1277 | struct iso_resource *r; | |
1278 | int ret; | |
1279 | ||
1280 | if ((request->channels == 0 && request->bandwidth == 0) || | |
1281 | request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL || | |
1282 | request->bandwidth < 0) | |
1283 | return -EINVAL; | |
1284 | ||
1285 | r = kmalloc(sizeof(*r), GFP_KERNEL); | |
1286 | e1 = kmalloc(sizeof(*e1), GFP_KERNEL); | |
1287 | e2 = kmalloc(sizeof(*e2), GFP_KERNEL); | |
1288 | if (r == NULL || e1 == NULL || e2 == NULL) { | |
1289 | ret = -ENOMEM; | |
1290 | goto fail; | |
1291 | } | |
1292 | ||
1293 | INIT_DELAYED_WORK(&r->work, iso_resource_work); | |
1294 | r->client = client; | |
1ec3c026 | 1295 | r->todo = todo; |
b1bda4cd JFSR |
1296 | r->generation = -1; |
1297 | r->channels = request->channels; | |
1298 | r->bandwidth = request->bandwidth; | |
1299 | r->e_alloc = e1; | |
1300 | r->e_dealloc = e2; | |
1301 | ||
e21fcf79 SR |
1302 | e1->iso_resource.closure = request->closure; |
1303 | e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED; | |
1304 | e2->iso_resource.closure = request->closure; | |
1305 | e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED; | |
b1bda4cd | 1306 | |
1ec3c026 SR |
1307 | if (todo == ISO_RES_ALLOC) { |
1308 | r->resource.release = release_iso_resource; | |
1309 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
81610b8f SR |
1310 | if (ret < 0) |
1311 | goto fail; | |
1ec3c026 SR |
1312 | } else { |
1313 | r->resource.release = NULL; | |
1314 | r->resource.handle = -1; | |
9fb551bf | 1315 | schedule_iso_resource(r, 0); |
1ec3c026 | 1316 | } |
b1bda4cd JFSR |
1317 | request->handle = r->resource.handle; |
1318 | ||
1319 | return 0; | |
1320 | fail: | |
1321 | kfree(r); | |
1322 | kfree(e1); | |
1323 | kfree(e2); | |
1324 | ||
1325 | return ret; | |
1326 | } | |
1327 | ||
6e95dea7 SR |
1328 | static int ioctl_allocate_iso_resource(struct client *client, |
1329 | union ioctl_arg *arg) | |
1ec3c026 | 1330 | { |
6e95dea7 SR |
1331 | return init_iso_resource(client, |
1332 | &arg->allocate_iso_resource, ISO_RES_ALLOC); | |
1ec3c026 SR |
1333 | } |
1334 | ||
6e95dea7 SR |
1335 | static int ioctl_deallocate_iso_resource(struct client *client, |
1336 | union ioctl_arg *arg) | |
b1bda4cd | 1337 | { |
6e95dea7 SR |
1338 | return release_client_resource(client, |
1339 | arg->deallocate.handle, release_iso_resource, NULL); | |
b1bda4cd JFSR |
1340 | } |
1341 | ||
6e95dea7 SR |
1342 | static int ioctl_allocate_iso_resource_once(struct client *client, |
1343 | union ioctl_arg *arg) | |
1ec3c026 | 1344 | { |
6e95dea7 SR |
1345 | return init_iso_resource(client, |
1346 | &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE); | |
1ec3c026 SR |
1347 | } |
1348 | ||
6e95dea7 SR |
1349 | static int ioctl_deallocate_iso_resource_once(struct client *client, |
1350 | union ioctl_arg *arg) | |
1ec3c026 | 1351 | { |
6e95dea7 SR |
1352 | return init_iso_resource(client, |
1353 | &arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE); | |
1ec3c026 SR |
1354 | } |
1355 | ||
c8a25900 SR |
1356 | /* |
1357 | * Returns a speed code: Maximum speed to or from this device, | |
1358 | * limited by the device's link speed, the local node's link speed, | |
1359 | * and all PHY port speeds between the two links. | |
1360 | */ | |
6e95dea7 | 1361 | static int ioctl_get_speed(struct client *client, union ioctl_arg *arg) |
33580a3e | 1362 | { |
c8a25900 | 1363 | return client->device->max_speed; |
33580a3e SR |
1364 | } |
1365 | ||
6e95dea7 SR |
1366 | static int ioctl_send_broadcast_request(struct client *client, |
1367 | union ioctl_arg *arg) | |
acfe8333 | 1368 | { |
6e95dea7 | 1369 | struct fw_cdev_send_request *a = &arg->send_request; |
acfe8333 | 1370 | |
6e95dea7 | 1371 | switch (a->tcode) { |
acfe8333 JFSR |
1372 | case TCODE_WRITE_QUADLET_REQUEST: |
1373 | case TCODE_WRITE_BLOCK_REQUEST: | |
1374 | break; | |
1375 | default: | |
1376 | return -EINVAL; | |
1377 | } | |
1378 | ||
1566f3dc | 1379 | /* Security policy: Only allow accesses to Units Space. */ |
6e95dea7 | 1380 | if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END) |
1566f3dc SR |
1381 | return -EACCES; |
1382 | ||
6e95dea7 | 1383 | return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100); |
acfe8333 JFSR |
1384 | } |
1385 | ||
6e95dea7 | 1386 | static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg) |
f8c2287c | 1387 | { |
6e95dea7 | 1388 | struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet; |
18e9b10f SR |
1389 | struct fw_cdev_send_request request; |
1390 | int dest; | |
f8c2287c | 1391 | |
6e95dea7 SR |
1392 | if (a->speed > client->device->card->link_speed || |
1393 | a->length > 1024 << a->speed) | |
18e9b10f | 1394 | return -EIO; |
f8c2287c | 1395 | |
6e95dea7 | 1396 | if (a->tag > 3 || a->channel > 63 || a->sy > 15) |
18e9b10f SR |
1397 | return -EINVAL; |
1398 | ||
6e95dea7 | 1399 | dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy); |
18e9b10f | 1400 | request.tcode = TCODE_STREAM_DATA; |
6e95dea7 SR |
1401 | request.length = a->length; |
1402 | request.closure = a->closure; | |
1403 | request.data = a->data; | |
1404 | request.generation = a->generation; | |
18e9b10f | 1405 | |
6e95dea7 | 1406 | return init_request(client, &request, dest, a->speed); |
f8c2287c JF |
1407 | } |
1408 | ||
850bb6f2 SR |
1409 | static void outbound_phy_packet_callback(struct fw_packet *packet, |
1410 | struct fw_card *card, int status) | |
1411 | { | |
1412 | struct outbound_phy_packet_event *e = | |
1413 | container_of(packet, struct outbound_phy_packet_event, p); | |
1414 | ||
1415 | switch (status) { | |
1416 | /* expected: */ | |
1417 | case ACK_COMPLETE: e->phy_packet.rcode = RCODE_COMPLETE; break; | |
1418 | /* should never happen with PHY packets: */ | |
1419 | case ACK_PENDING: e->phy_packet.rcode = RCODE_COMPLETE; break; | |
1420 | case ACK_BUSY_X: | |
1421 | case ACK_BUSY_A: | |
1422 | case ACK_BUSY_B: e->phy_packet.rcode = RCODE_BUSY; break; | |
1423 | case ACK_DATA_ERROR: e->phy_packet.rcode = RCODE_DATA_ERROR; break; | |
1424 | case ACK_TYPE_ERROR: e->phy_packet.rcode = RCODE_TYPE_ERROR; break; | |
1425 | /* stale generation; cancelled; on certain controllers: no ack */ | |
1426 | default: e->phy_packet.rcode = status; break; | |
1427 | } | |
cc550216 | 1428 | e->phy_packet.data[0] = packet->timestamp; |
850bb6f2 | 1429 | |
cc550216 SR |
1430 | queue_event(e->client, &e->event, &e->phy_packet, |
1431 | sizeof(e->phy_packet) + e->phy_packet.length, NULL, 0); | |
850bb6f2 SR |
1432 | client_put(e->client); |
1433 | } | |
1434 | ||
1435 | static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg) | |
1436 | { | |
1437 | struct fw_cdev_send_phy_packet *a = &arg->send_phy_packet; | |
1438 | struct fw_card *card = client->device->card; | |
1439 | struct outbound_phy_packet_event *e; | |
1440 | ||
1441 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1442 | if (!client->device->is_local) | |
1443 | return -ENOSYS; | |
1444 | ||
cc550216 | 1445 | e = kzalloc(sizeof(*e) + 4, GFP_KERNEL); |
850bb6f2 SR |
1446 | if (e == NULL) |
1447 | return -ENOMEM; | |
1448 | ||
1449 | client_get(client); | |
1450 | e->client = client; | |
1451 | e->p.speed = SCODE_100; | |
1452 | e->p.generation = a->generation; | |
1453 | e->p.header[0] = a->data[0]; | |
1454 | e->p.header[1] = a->data[1]; | |
1455 | e->p.header_length = 8; | |
1456 | e->p.callback = outbound_phy_packet_callback; | |
1457 | e->phy_packet.closure = a->closure; | |
1458 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_SENT; | |
cc550216 SR |
1459 | if (is_ping_packet(a->data)) |
1460 | e->phy_packet.length = 4; | |
850bb6f2 SR |
1461 | |
1462 | card->driver->send_request(card, &e->p); | |
1463 | ||
1464 | return 0; | |
1465 | } | |
1466 | ||
bf54e146 SR |
1467 | static int ioctl_receive_phy_packets(struct client *client, union ioctl_arg *arg) |
1468 | { | |
1469 | struct fw_cdev_receive_phy_packets *a = &arg->receive_phy_packets; | |
1470 | struct fw_card *card = client->device->card; | |
1471 | ||
1472 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1473 | if (!client->device->is_local) | |
1474 | return -ENOSYS; | |
1475 | ||
1476 | spin_lock_irq(&card->lock); | |
1477 | ||
1478 | list_move_tail(&client->phy_receiver_link, &card->phy_receiver_list); | |
1479 | client->phy_receiver_closure = a->closure; | |
1480 | ||
1481 | spin_unlock_irq(&card->lock); | |
1482 | ||
1483 | return 0; | |
1484 | } | |
1485 | ||
1486 | void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p) | |
1487 | { | |
1488 | struct client *client; | |
1489 | struct inbound_phy_packet_event *e; | |
1490 | unsigned long flags; | |
1491 | ||
1492 | spin_lock_irqsave(&card->lock, flags); | |
1493 | ||
1494 | list_for_each_entry(client, &card->phy_receiver_list, phy_receiver_link) { | |
1495 | e = kmalloc(sizeof(*e) + 8, GFP_ATOMIC); | |
1496 | if (e == NULL) { | |
1497 | fw_notify("Out of memory when allocating event\n"); | |
1498 | break; | |
1499 | } | |
1500 | e->phy_packet.closure = client->phy_receiver_closure; | |
1501 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_RECEIVED; | |
1502 | e->phy_packet.rcode = RCODE_COMPLETE; | |
1503 | e->phy_packet.length = 8; | |
1504 | e->phy_packet.data[0] = p->header[1]; | |
1505 | e->phy_packet.data[1] = p->header[2]; | |
1506 | queue_event(client, &e->event, | |
1507 | &e->phy_packet, sizeof(e->phy_packet) + 8, NULL, 0); | |
1508 | } | |
1509 | ||
1510 | spin_unlock_irqrestore(&card->lock, flags); | |
1511 | } | |
1512 | ||
6e95dea7 | 1513 | static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = { |
b9dc61cf SR |
1514 | [0x00] = ioctl_get_info, |
1515 | [0x01] = ioctl_send_request, | |
1516 | [0x02] = ioctl_allocate, | |
1517 | [0x03] = ioctl_deallocate, | |
1518 | [0x04] = ioctl_send_response, | |
1519 | [0x05] = ioctl_initiate_bus_reset, | |
1520 | [0x06] = ioctl_add_descriptor, | |
1521 | [0x07] = ioctl_remove_descriptor, | |
1522 | [0x08] = ioctl_create_iso_context, | |
1523 | [0x09] = ioctl_queue_iso, | |
1524 | [0x0a] = ioctl_start_iso, | |
1525 | [0x0b] = ioctl_stop_iso, | |
1526 | [0x0c] = ioctl_get_cycle_timer, | |
1527 | [0x0d] = ioctl_allocate_iso_resource, | |
1528 | [0x0e] = ioctl_deallocate_iso_resource, | |
1529 | [0x0f] = ioctl_allocate_iso_resource_once, | |
1530 | [0x10] = ioctl_deallocate_iso_resource_once, | |
1531 | [0x11] = ioctl_get_speed, | |
1532 | [0x12] = ioctl_send_broadcast_request, | |
1533 | [0x13] = ioctl_send_stream_packet, | |
1534 | [0x14] = ioctl_get_cycle_timer2, | |
850bb6f2 | 1535 | [0x15] = ioctl_send_phy_packet, |
bf54e146 | 1536 | [0x16] = ioctl_receive_phy_packets, |
4f259223 KH |
1537 | }; |
1538 | ||
53dca511 SR |
1539 | static int dispatch_ioctl(struct client *client, |
1540 | unsigned int cmd, void __user *arg) | |
19a15b93 | 1541 | { |
6e95dea7 | 1542 | union ioctl_arg buffer; |
2dbd7d7e | 1543 | int ret; |
4f259223 | 1544 | |
64582298 SR |
1545 | if (fw_device_is_shutdown(client->device)) |
1546 | return -ENODEV; | |
1547 | ||
4f259223 | 1548 | if (_IOC_TYPE(cmd) != '#' || |
9cac00b8 SR |
1549 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) || |
1550 | _IOC_SIZE(cmd) > sizeof(buffer)) | |
19a15b93 | 1551 | return -EINVAL; |
4f259223 | 1552 | |
9cac00b8 SR |
1553 | if (_IOC_DIR(cmd) == _IOC_READ) |
1554 | memset(&buffer, 0, _IOC_SIZE(cmd)); | |
1555 | ||
1556 | if (_IOC_DIR(cmd) & _IOC_WRITE) | |
1557 | if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd))) | |
4f259223 | 1558 | return -EFAULT; |
4f259223 | 1559 | |
6e95dea7 | 1560 | ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer); |
2dbd7d7e SR |
1561 | if (ret < 0) |
1562 | return ret; | |
4f259223 | 1563 | |
9cac00b8 SR |
1564 | if (_IOC_DIR(cmd) & _IOC_READ) |
1565 | if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd))) | |
4f259223 | 1566 | return -EFAULT; |
4f259223 | 1567 | |
2dbd7d7e | 1568 | return ret; |
19a15b93 KH |
1569 | } |
1570 | ||
53dca511 SR |
1571 | static long fw_device_op_ioctl(struct file *file, |
1572 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1573 | { |
64582298 | 1574 | return dispatch_ioctl(file->private_data, cmd, (void __user *)arg); |
19a15b93 KH |
1575 | } |
1576 | ||
1577 | #ifdef CONFIG_COMPAT | |
53dca511 SR |
1578 | static long fw_device_op_compat_ioctl(struct file *file, |
1579 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1580 | { |
64582298 | 1581 | return dispatch_ioctl(file->private_data, cmd, compat_ptr(arg)); |
19a15b93 KH |
1582 | } |
1583 | #endif | |
1584 | ||
1585 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
1586 | { | |
1587 | struct client *client = file->private_data; | |
9aad8125 KH |
1588 | enum dma_data_direction direction; |
1589 | unsigned long size; | |
2dbd7d7e | 1590 | int page_count, ret; |
9aad8125 | 1591 | |
551f4cb9 JF |
1592 | if (fw_device_is_shutdown(client->device)) |
1593 | return -ENODEV; | |
1594 | ||
9aad8125 KH |
1595 | /* FIXME: We could support multiple buffers, but we don't. */ |
1596 | if (client->buffer.pages != NULL) | |
1597 | return -EBUSY; | |
1598 | ||
1599 | if (!(vma->vm_flags & VM_SHARED)) | |
1600 | return -EINVAL; | |
19a15b93 | 1601 | |
9aad8125 | 1602 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
1603 | return -EINVAL; |
1604 | ||
1605 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
1606 | size = vma->vm_end - vma->vm_start; |
1607 | page_count = size >> PAGE_SHIFT; | |
1608 | if (size & ~PAGE_MASK) | |
1609 | return -EINVAL; | |
1610 | ||
1611 | if (vma->vm_flags & VM_WRITE) | |
1612 | direction = DMA_TO_DEVICE; | |
1613 | else | |
1614 | direction = DMA_FROM_DEVICE; | |
1615 | ||
2dbd7d7e SR |
1616 | ret = fw_iso_buffer_init(&client->buffer, client->device->card, |
1617 | page_count, direction); | |
1618 | if (ret < 0) | |
1619 | return ret; | |
19a15b93 | 1620 | |
2dbd7d7e SR |
1621 | ret = fw_iso_buffer_map(&client->buffer, vma); |
1622 | if (ret < 0) | |
9aad8125 KH |
1623 | fw_iso_buffer_destroy(&client->buffer, client->device->card); |
1624 | ||
2dbd7d7e | 1625 | return ret; |
19a15b93 KH |
1626 | } |
1627 | ||
45ee3199 JF |
1628 | static int shutdown_resource(int id, void *p, void *data) |
1629 | { | |
e21fcf79 | 1630 | struct client_resource *resource = p; |
45ee3199 JF |
1631 | struct client *client = data; |
1632 | ||
e21fcf79 | 1633 | resource->release(client, resource); |
fb443036 | 1634 | client_put(client); |
45ee3199 JF |
1635 | |
1636 | return 0; | |
1637 | } | |
1638 | ||
19a15b93 KH |
1639 | static int fw_device_op_release(struct inode *inode, struct file *file) |
1640 | { | |
1641 | struct client *client = file->private_data; | |
e21fcf79 | 1642 | struct event *event, *next_event; |
19a15b93 | 1643 | |
bf54e146 SR |
1644 | spin_lock_irq(&client->device->card->lock); |
1645 | list_del(&client->phy_receiver_link); | |
1646 | spin_unlock_irq(&client->device->card->lock); | |
1647 | ||
97811e34 SR |
1648 | mutex_lock(&client->device->client_list_mutex); |
1649 | list_del(&client->link); | |
1650 | mutex_unlock(&client->device->client_list_mutex); | |
1651 | ||
19a15b93 KH |
1652 | if (client->iso_context) |
1653 | fw_iso_context_destroy(client->iso_context); | |
1654 | ||
36a755cf SR |
1655 | if (client->buffer.pages) |
1656 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
1657 | ||
45ee3199 | 1658 | /* Freeze client->resource_idr and client->event_list */ |
3ba94986 | 1659 | spin_lock_irq(&client->lock); |
45ee3199 | 1660 | client->in_shutdown = true; |
3ba94986 | 1661 | spin_unlock_irq(&client->lock); |
66dea3e5 | 1662 | |
45ee3199 JF |
1663 | idr_for_each(&client->resource_idr, shutdown_resource, client); |
1664 | idr_remove_all(&client->resource_idr); | |
1665 | idr_destroy(&client->resource_idr); | |
28cf6a04 | 1666 | |
e21fcf79 SR |
1667 | list_for_each_entry_safe(event, next_event, &client->event_list, link) |
1668 | kfree(event); | |
19a15b93 | 1669 | |
fb443036 | 1670 | client_put(client); |
19a15b93 KH |
1671 | |
1672 | return 0; | |
1673 | } | |
1674 | ||
1675 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
1676 | { | |
1677 | struct client *client = file->private_data; | |
2603bf21 | 1678 | unsigned int mask = 0; |
19a15b93 KH |
1679 | |
1680 | poll_wait(file, &client->wait, pt); | |
1681 | ||
2603bf21 KH |
1682 | if (fw_device_is_shutdown(client->device)) |
1683 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 1684 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
1685 | mask |= POLLIN | POLLRDNORM; |
1686 | ||
1687 | return mask; | |
19a15b93 KH |
1688 | } |
1689 | ||
21ebcd12 | 1690 | const struct file_operations fw_device_ops = { |
19a15b93 | 1691 | .owner = THIS_MODULE, |
3ac26b2e | 1692 | .llseek = no_llseek, |
19a15b93 KH |
1693 | .open = fw_device_op_open, |
1694 | .read = fw_device_op_read, | |
1695 | .unlocked_ioctl = fw_device_op_ioctl, | |
19a15b93 | 1696 | .mmap = fw_device_op_mmap, |
3ac26b2e SR |
1697 | .release = fw_device_op_release, |
1698 | .poll = fw_device_op_poll, | |
19a15b93 | 1699 | #ifdef CONFIG_COMPAT |
5af4e5ea | 1700 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
1701 | #endif |
1702 | }; |