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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 | ||
21 | #include <linux/module.h> | |
22 | #include <linux/kernel.h> | |
fb443036 | 23 | #include <linux/kref.h> |
19a15b93 KH |
24 | #include <linux/wait.h> |
25 | #include <linux/errno.h> | |
26 | #include <linux/device.h> | |
27 | #include <linux/vmalloc.h> | |
d67cfb96 | 28 | #include <linux/mutex.h> |
19a15b93 | 29 | #include <linux/poll.h> |
a64408b9 SR |
30 | #include <linux/preempt.h> |
31 | #include <linux/time.h> | |
cf417e54 | 32 | #include <linux/spinlock.h> |
19a15b93 KH |
33 | #include <linux/delay.h> |
34 | #include <linux/mm.h> | |
a3aca3da | 35 | #include <linux/idr.h> |
19a15b93 | 36 | #include <linux/compat.h> |
9640d3d7 | 37 | #include <linux/firewire-cdev.h> |
a64408b9 | 38 | #include <asm/system.h> |
19a15b93 KH |
39 | #include <asm/uaccess.h> |
40 | #include "fw-transaction.h" | |
41 | #include "fw-topology.h" | |
42 | #include "fw-device.h" | |
19a15b93 | 43 | |
3964a449 | 44 | struct client; |
45ee3199 JF |
45 | struct client_resource; |
46 | typedef void (*client_resource_release_fn_t)(struct client *, | |
47 | struct client_resource *); | |
3964a449 | 48 | struct client_resource { |
45ee3199 JF |
49 | client_resource_release_fn_t release; |
50 | int handle; | |
3964a449 KH |
51 | }; |
52 | ||
c781c06d KH |
53 | /* |
54 | * dequeue_event() just kfree()'s the event, so the event has to be | |
55 | * the first field in the struct. | |
56 | */ | |
57 | ||
19a15b93 KH |
58 | struct event { |
59 | struct { void *data; size_t size; } v[2]; | |
60 | struct list_head link; | |
61 | }; | |
62 | ||
97bd9efa KH |
63 | struct bus_reset { |
64 | struct event event; | |
65 | struct fw_cdev_event_bus_reset reset; | |
66 | }; | |
67 | ||
19a15b93 KH |
68 | struct response { |
69 | struct event event; | |
70 | struct fw_transaction transaction; | |
71 | struct client *client; | |
3964a449 | 72 | struct client_resource resource; |
19a15b93 KH |
73 | struct fw_cdev_event_response response; |
74 | }; | |
75 | ||
76 | struct iso_interrupt { | |
77 | struct event event; | |
78 | struct fw_cdev_event_iso_interrupt interrupt; | |
79 | }; | |
80 | ||
81 | struct client { | |
344bbc4d | 82 | u32 version; |
19a15b93 | 83 | struct fw_device *device; |
45ee3199 | 84 | |
19a15b93 | 85 | spinlock_t lock; |
45ee3199 JF |
86 | bool in_shutdown; |
87 | struct idr resource_idr; | |
19a15b93 | 88 | struct list_head event_list; |
19a15b93 | 89 | wait_queue_head_t wait; |
da8ecffa | 90 | u64 bus_reset_closure; |
9aad8125 | 91 | |
19a15b93 | 92 | struct fw_iso_context *iso_context; |
abaa5743 | 93 | u64 iso_closure; |
9aad8125 KH |
94 | struct fw_iso_buffer buffer; |
95 | unsigned long vm_start; | |
97bd9efa KH |
96 | |
97 | struct list_head link; | |
fb443036 | 98 | struct kref kref; |
19a15b93 KH |
99 | }; |
100 | ||
fb443036 SR |
101 | static inline void client_get(struct client *client) |
102 | { | |
103 | kref_get(&client->kref); | |
104 | } | |
105 | ||
106 | static void client_release(struct kref *kref) | |
107 | { | |
108 | struct client *client = container_of(kref, struct client, kref); | |
109 | ||
110 | fw_device_put(client->device); | |
111 | kfree(client); | |
112 | } | |
113 | ||
114 | static void client_put(struct client *client) | |
115 | { | |
116 | kref_put(&client->kref, client_release); | |
117 | } | |
118 | ||
53dca511 | 119 | static inline void __user *u64_to_uptr(__u64 value) |
19a15b93 KH |
120 | { |
121 | return (void __user *)(unsigned long)value; | |
122 | } | |
123 | ||
53dca511 | 124 | static inline __u64 uptr_to_u64(void __user *ptr) |
19a15b93 KH |
125 | { |
126 | return (__u64)(unsigned long)ptr; | |
127 | } | |
128 | ||
129 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
130 | { | |
131 | struct fw_device *device; | |
132 | struct client *client; | |
133 | ||
96b19062 | 134 | device = fw_device_get_by_devt(inode->i_rdev); |
a3aca3da KH |
135 | if (device == NULL) |
136 | return -ENODEV; | |
19a15b93 | 137 | |
551f4cb9 JF |
138 | if (fw_device_is_shutdown(device)) { |
139 | fw_device_put(device); | |
140 | return -ENODEV; | |
141 | } | |
142 | ||
2d826cc5 | 143 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
96b19062 SR |
144 | if (client == NULL) { |
145 | fw_device_put(device); | |
19a15b93 | 146 | return -ENOMEM; |
96b19062 | 147 | } |
19a15b93 | 148 | |
96b19062 | 149 | client->device = device; |
19a15b93 | 150 | spin_lock_init(&client->lock); |
45ee3199 JF |
151 | idr_init(&client->resource_idr); |
152 | INIT_LIST_HEAD(&client->event_list); | |
19a15b93 | 153 | init_waitqueue_head(&client->wait); |
fb443036 | 154 | kref_init(&client->kref); |
19a15b93 KH |
155 | |
156 | file->private_data = client; | |
157 | ||
d67cfb96 | 158 | mutex_lock(&device->client_list_mutex); |
97bd9efa | 159 | list_add_tail(&client->link, &device->client_list); |
d67cfb96 | 160 | mutex_unlock(&device->client_list_mutex); |
97bd9efa | 161 | |
19a15b93 KH |
162 | return 0; |
163 | } | |
164 | ||
165 | static void queue_event(struct client *client, struct event *event, | |
166 | void *data0, size_t size0, void *data1, size_t size1) | |
167 | { | |
168 | unsigned long flags; | |
169 | ||
170 | event->v[0].data = data0; | |
171 | event->v[0].size = size0; | |
172 | event->v[1].data = data1; | |
173 | event->v[1].size = size1; | |
174 | ||
175 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
176 | if (client->in_shutdown) |
177 | kfree(event); | |
178 | else | |
179 | list_add_tail(&event->link, &client->event_list); | |
19a15b93 | 180 | spin_unlock_irqrestore(&client->lock, flags); |
83431cba JF |
181 | |
182 | wake_up_interruptible(&client->wait); | |
19a15b93 KH |
183 | } |
184 | ||
53dca511 SR |
185 | static int dequeue_event(struct client *client, |
186 | char __user *buffer, size_t count) | |
19a15b93 KH |
187 | { |
188 | unsigned long flags; | |
189 | struct event *event; | |
190 | size_t size, total; | |
2dbd7d7e | 191 | int i, ret; |
19a15b93 | 192 | |
2dbd7d7e SR |
193 | ret = wait_event_interruptible(client->wait, |
194 | !list_empty(&client->event_list) || | |
195 | fw_device_is_shutdown(client->device)); | |
196 | if (ret < 0) | |
197 | return ret; | |
19a15b93 | 198 | |
2603bf21 KH |
199 | if (list_empty(&client->event_list) && |
200 | fw_device_is_shutdown(client->device)) | |
201 | return -ENODEV; | |
19a15b93 | 202 | |
2603bf21 | 203 | spin_lock_irqsave(&client->lock, flags); |
a459b8ab | 204 | event = list_first_entry(&client->event_list, struct event, link); |
19a15b93 | 205 | list_del(&event->link); |
19a15b93 KH |
206 | spin_unlock_irqrestore(&client->lock, flags); |
207 | ||
19a15b93 KH |
208 | total = 0; |
209 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
210 | size = min(event->v[i].size, count - total); | |
2603bf21 | 211 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
2dbd7d7e | 212 | ret = -EFAULT; |
19a15b93 | 213 | goto out; |
2603bf21 | 214 | } |
19a15b93 KH |
215 | total += size; |
216 | } | |
2dbd7d7e | 217 | ret = total; |
19a15b93 KH |
218 | |
219 | out: | |
220 | kfree(event); | |
221 | ||
2dbd7d7e | 222 | return ret; |
19a15b93 KH |
223 | } |
224 | ||
53dca511 SR |
225 | static ssize_t fw_device_op_read(struct file *file, char __user *buffer, |
226 | size_t count, loff_t *offset) | |
19a15b93 KH |
227 | { |
228 | struct client *client = file->private_data; | |
229 | ||
230 | return dequeue_event(client, buffer, count); | |
231 | } | |
232 | ||
53dca511 SR |
233 | static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, |
234 | struct client *client) | |
344bbc4d | 235 | { |
da8ecffa | 236 | struct fw_card *card = client->device->card; |
cf417e54 JF |
237 | unsigned long flags; |
238 | ||
239 | spin_lock_irqsave(&card->lock, flags); | |
344bbc4d | 240 | |
da8ecffa | 241 | event->closure = client->bus_reset_closure; |
344bbc4d | 242 | event->type = FW_CDEV_EVENT_BUS_RESET; |
cf5a56ac | 243 | event->generation = client->device->generation; |
da8ecffa | 244 | event->node_id = client->device->node_id; |
344bbc4d KH |
245 | event->local_node_id = card->local_node->node_id; |
246 | event->bm_node_id = 0; /* FIXME: We don't track the BM. */ | |
247 | event->irm_node_id = card->irm_node->node_id; | |
248 | event->root_node_id = card->root_node->node_id; | |
cf417e54 JF |
249 | |
250 | spin_unlock_irqrestore(&card->lock, flags); | |
344bbc4d KH |
251 | } |
252 | ||
53dca511 SR |
253 | static void for_each_client(struct fw_device *device, |
254 | void (*callback)(struct client *client)) | |
2603bf21 | 255 | { |
2603bf21 | 256 | struct client *c; |
2603bf21 | 257 | |
d67cfb96 | 258 | mutex_lock(&device->client_list_mutex); |
2603bf21 KH |
259 | list_for_each_entry(c, &device->client_list, link) |
260 | callback(c); | |
d67cfb96 | 261 | mutex_unlock(&device->client_list_mutex); |
2603bf21 KH |
262 | } |
263 | ||
53dca511 | 264 | static void queue_bus_reset_event(struct client *client) |
97bd9efa KH |
265 | { |
266 | struct bus_reset *bus_reset; | |
97bd9efa | 267 | |
d67cfb96 | 268 | bus_reset = kzalloc(sizeof(*bus_reset), GFP_KERNEL); |
97bd9efa KH |
269 | if (bus_reset == NULL) { |
270 | fw_notify("Out of memory when allocating bus reset event\n"); | |
271 | return; | |
272 | } | |
273 | ||
da8ecffa | 274 | fill_bus_reset_event(&bus_reset->reset, client); |
97bd9efa KH |
275 | |
276 | queue_event(client, &bus_reset->event, | |
2d826cc5 | 277 | &bus_reset->reset, sizeof(bus_reset->reset), NULL, 0); |
97bd9efa KH |
278 | } |
279 | ||
280 | void fw_device_cdev_update(struct fw_device *device) | |
281 | { | |
2603bf21 KH |
282 | for_each_client(device, queue_bus_reset_event); |
283 | } | |
97bd9efa | 284 | |
2603bf21 KH |
285 | static void wake_up_client(struct client *client) |
286 | { | |
287 | wake_up_interruptible(&client->wait); | |
288 | } | |
97bd9efa | 289 | |
2603bf21 KH |
290 | void fw_device_cdev_remove(struct fw_device *device) |
291 | { | |
292 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
293 | } |
294 | ||
4f259223 | 295 | static int ioctl_get_info(struct client *client, void *buffer) |
19a15b93 | 296 | { |
4f259223 | 297 | struct fw_cdev_get_info *get_info = buffer; |
344bbc4d | 298 | struct fw_cdev_event_bus_reset bus_reset; |
c9755e14 | 299 | unsigned long ret = 0; |
344bbc4d | 300 | |
4f259223 KH |
301 | client->version = get_info->version; |
302 | get_info->version = FW_CDEV_VERSION; | |
cf417e54 | 303 | get_info->card = client->device->card->index; |
344bbc4d | 304 | |
c9755e14 SR |
305 | down_read(&fw_device_rwsem); |
306 | ||
4f259223 KH |
307 | if (get_info->rom != 0) { |
308 | void __user *uptr = u64_to_uptr(get_info->rom); | |
309 | size_t want = get_info->rom_length; | |
d84702a5 | 310 | size_t have = client->device->config_rom_length * 4; |
344bbc4d | 311 | |
c9755e14 SR |
312 | ret = copy_to_user(uptr, client->device->config_rom, |
313 | min(want, have)); | |
344bbc4d | 314 | } |
4f259223 | 315 | get_info->rom_length = client->device->config_rom_length * 4; |
344bbc4d | 316 | |
c9755e14 SR |
317 | up_read(&fw_device_rwsem); |
318 | ||
319 | if (ret != 0) | |
320 | return -EFAULT; | |
321 | ||
4f259223 KH |
322 | client->bus_reset_closure = get_info->bus_reset_closure; |
323 | if (get_info->bus_reset != 0) { | |
324 | void __user *uptr = u64_to_uptr(get_info->bus_reset); | |
344bbc4d | 325 | |
da8ecffa | 326 | fill_bus_reset_event(&bus_reset, client); |
2d826cc5 | 327 | if (copy_to_user(uptr, &bus_reset, sizeof(bus_reset))) |
344bbc4d KH |
328 | return -EFAULT; |
329 | } | |
19a15b93 | 330 | |
19a15b93 KH |
331 | return 0; |
332 | } | |
333 | ||
53dca511 SR |
334 | static int add_client_resource(struct client *client, |
335 | struct client_resource *resource, gfp_t gfp_mask) | |
3964a449 KH |
336 | { |
337 | unsigned long flags; | |
45ee3199 JF |
338 | int ret; |
339 | ||
340 | retry: | |
341 | if (idr_pre_get(&client->resource_idr, gfp_mask) == 0) | |
342 | return -ENOMEM; | |
3964a449 KH |
343 | |
344 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
345 | if (client->in_shutdown) |
346 | ret = -ECANCELED; | |
347 | else | |
348 | ret = idr_get_new(&client->resource_idr, resource, | |
349 | &resource->handle); | |
fb443036 SR |
350 | if (ret >= 0) |
351 | client_get(client); | |
3964a449 | 352 | spin_unlock_irqrestore(&client->lock, flags); |
45ee3199 JF |
353 | |
354 | if (ret == -EAGAIN) | |
355 | goto retry; | |
356 | ||
357 | return ret < 0 ? ret : 0; | |
3964a449 KH |
358 | } |
359 | ||
53dca511 SR |
360 | static int release_client_resource(struct client *client, u32 handle, |
361 | client_resource_release_fn_t release, | |
362 | struct client_resource **resource) | |
3964a449 KH |
363 | { |
364 | struct client_resource *r; | |
365 | unsigned long flags; | |
366 | ||
367 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
368 | if (client->in_shutdown) |
369 | r = NULL; | |
370 | else | |
371 | r = idr_find(&client->resource_idr, handle); | |
372 | if (r && r->release == release) | |
373 | idr_remove(&client->resource_idr, handle); | |
3964a449 KH |
374 | spin_unlock_irqrestore(&client->lock, flags); |
375 | ||
45ee3199 | 376 | if (!(r && r->release == release)) |
3964a449 KH |
377 | return -EINVAL; |
378 | ||
379 | if (resource) | |
380 | *resource = r; | |
381 | else | |
382 | r->release(client, r); | |
383 | ||
fb443036 SR |
384 | client_put(client); |
385 | ||
3964a449 KH |
386 | return 0; |
387 | } | |
388 | ||
53dca511 SR |
389 | static void release_transaction(struct client *client, |
390 | struct client_resource *resource) | |
3964a449 KH |
391 | { |
392 | struct response *response = | |
393 | container_of(resource, struct response, resource); | |
394 | ||
395 | fw_cancel_transaction(client->device->card, &response->transaction); | |
396 | } | |
397 | ||
53dca511 SR |
398 | static void complete_transaction(struct fw_card *card, int rcode, |
399 | void *payload, size_t length, void *data) | |
19a15b93 KH |
400 | { |
401 | struct response *response = data; | |
402 | struct client *client = response->client; | |
28cf6a04 | 403 | unsigned long flags; |
8401d92b | 404 | struct fw_cdev_event_response *r = &response->response; |
19a15b93 | 405 | |
8401d92b DM |
406 | if (length < r->length) |
407 | r->length = length; | |
19a15b93 | 408 | if (rcode == RCODE_COMPLETE) |
8401d92b | 409 | memcpy(r->data, payload, r->length); |
19a15b93 | 410 | |
28cf6a04 | 411 | spin_lock_irqsave(&client->lock, flags); |
45ee3199 | 412 | /* |
fb443036 SR |
413 | * 1. If called while in shutdown, the idr tree must be left untouched. |
414 | * The idr handle will be removed and the client reference will be | |
415 | * dropped later. | |
416 | * 2. If the call chain was release_client_resource -> | |
417 | * release_transaction -> complete_transaction (instead of a normal | |
418 | * conclusion of the transaction), i.e. if this resource was already | |
419 | * unregistered from the idr, the client reference will be dropped | |
420 | * by release_client_resource and we must not drop it here. | |
45ee3199 | 421 | */ |
fb443036 SR |
422 | if (!client->in_shutdown && |
423 | idr_find(&client->resource_idr, response->resource.handle)) { | |
45ee3199 | 424 | idr_remove(&client->resource_idr, response->resource.handle); |
fb443036 SR |
425 | /* Drop the idr's reference */ |
426 | client_put(client); | |
427 | } | |
28cf6a04 KH |
428 | spin_unlock_irqrestore(&client->lock, flags); |
429 | ||
8401d92b DM |
430 | r->type = FW_CDEV_EVENT_RESPONSE; |
431 | r->rcode = rcode; | |
432 | ||
433 | /* | |
434 | * In the case that sizeof(*r) doesn't align with the position of the | |
435 | * data, and the read is short, preserve an extra copy of the data | |
436 | * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless | |
437 | * for short reads and some apps depended on it, this is both safe | |
438 | * and prudent for compatibility. | |
439 | */ | |
440 | if (r->length <= sizeof(*r) - offsetof(typeof(*r), data)) | |
441 | queue_event(client, &response->event, r, sizeof(*r), | |
442 | r->data, r->length); | |
443 | else | |
444 | queue_event(client, &response->event, r, sizeof(*r) + r->length, | |
445 | NULL, 0); | |
fb443036 SR |
446 | |
447 | /* Drop the transaction callback's reference */ | |
448 | client_put(client); | |
19a15b93 KH |
449 | } |
450 | ||
350958f9 | 451 | static int ioctl_send_request(struct client *client, void *buffer) |
19a15b93 KH |
452 | { |
453 | struct fw_device *device = client->device; | |
4f259223 | 454 | struct fw_cdev_send_request *request = buffer; |
19a15b93 | 455 | struct response *response; |
1f3125af | 456 | int ret; |
19a15b93 | 457 | |
19a15b93 | 458 | /* What is the biggest size we'll accept, really? */ |
4f259223 | 459 | if (request->length > 4096) |
19a15b93 KH |
460 | return -EINVAL; |
461 | ||
2d826cc5 | 462 | response = kmalloc(sizeof(*response) + request->length, GFP_KERNEL); |
19a15b93 KH |
463 | if (response == NULL) |
464 | return -ENOMEM; | |
465 | ||
466 | response->client = client; | |
4f259223 KH |
467 | response->response.length = request->length; |
468 | response->response.closure = request->closure; | |
19a15b93 | 469 | |
4f259223 | 470 | if (request->data && |
19a15b93 | 471 | copy_from_user(response->response.data, |
4f259223 | 472 | u64_to_uptr(request->data), request->length)) { |
1f3125af | 473 | ret = -EFAULT; |
45ee3199 | 474 | goto failed; |
1f3125af SR |
475 | } |
476 | ||
477 | switch (request->tcode) { | |
478 | case TCODE_WRITE_QUADLET_REQUEST: | |
479 | case TCODE_WRITE_BLOCK_REQUEST: | |
480 | case TCODE_READ_QUADLET_REQUEST: | |
481 | case TCODE_READ_BLOCK_REQUEST: | |
482 | case TCODE_LOCK_MASK_SWAP: | |
483 | case TCODE_LOCK_COMPARE_SWAP: | |
484 | case TCODE_LOCK_FETCH_ADD: | |
485 | case TCODE_LOCK_LITTLE_ADD: | |
486 | case TCODE_LOCK_BOUNDED_ADD: | |
487 | case TCODE_LOCK_WRAP_ADD: | |
488 | case TCODE_LOCK_VENDOR_DEPENDENT: | |
489 | break; | |
490 | default: | |
491 | ret = -EINVAL; | |
45ee3199 | 492 | goto failed; |
19a15b93 KH |
493 | } |
494 | ||
3964a449 | 495 | response->resource.release = release_transaction; |
45ee3199 JF |
496 | ret = add_client_resource(client, &response->resource, GFP_KERNEL); |
497 | if (ret < 0) | |
498 | goto failed; | |
28cf6a04 | 499 | |
fb443036 SR |
500 | /* Get a reference for the transaction callback */ |
501 | client_get(client); | |
502 | ||
19a15b93 | 503 | fw_send_request(device->card, &response->transaction, |
4f259223 | 504 | request->tcode & 0x1f, |
907293d7 | 505 | device->node->node_id, |
4f259223 | 506 | request->generation, |
f1397490 | 507 | device->max_speed, |
4f259223 KH |
508 | request->offset, |
509 | response->response.data, request->length, | |
19a15b93 KH |
510 | complete_transaction, response); |
511 | ||
4f259223 | 512 | if (request->data) |
2d826cc5 | 513 | return sizeof(request) + request->length; |
19a15b93 | 514 | else |
2d826cc5 | 515 | return sizeof(request); |
45ee3199 | 516 | failed: |
1f3125af SR |
517 | kfree(response); |
518 | ||
519 | return ret; | |
19a15b93 KH |
520 | } |
521 | ||
522 | struct address_handler { | |
523 | struct fw_address_handler handler; | |
524 | __u64 closure; | |
525 | struct client *client; | |
3964a449 | 526 | struct client_resource resource; |
19a15b93 KH |
527 | }; |
528 | ||
529 | struct request { | |
530 | struct fw_request *request; | |
531 | void *data; | |
532 | size_t length; | |
3964a449 | 533 | struct client_resource resource; |
19a15b93 KH |
534 | }; |
535 | ||
536 | struct request_event { | |
537 | struct event event; | |
538 | struct fw_cdev_event_request request; | |
539 | }; | |
540 | ||
53dca511 SR |
541 | static void release_request(struct client *client, |
542 | struct client_resource *resource) | |
3964a449 KH |
543 | { |
544 | struct request *request = | |
545 | container_of(resource, struct request, resource); | |
546 | ||
547 | fw_send_response(client->device->card, request->request, | |
548 | RCODE_CONFLICT_ERROR); | |
549 | kfree(request); | |
550 | } | |
551 | ||
53dca511 SR |
552 | static void handle_request(struct fw_card *card, struct fw_request *r, |
553 | int tcode, int destination, int source, | |
554 | int generation, int speed, | |
555 | unsigned long long offset, | |
556 | void *payload, size_t length, void *callback_data) | |
19a15b93 KH |
557 | { |
558 | struct address_handler *handler = callback_data; | |
559 | struct request *request; | |
560 | struct request_event *e; | |
19a15b93 | 561 | struct client *client = handler->client; |
45ee3199 | 562 | int ret; |
19a15b93 | 563 | |
2d826cc5 KH |
564 | request = kmalloc(sizeof(*request), GFP_ATOMIC); |
565 | e = kmalloc(sizeof(*e), GFP_ATOMIC); | |
45ee3199 JF |
566 | if (request == NULL || e == NULL) |
567 | goto failed; | |
19a15b93 KH |
568 | |
569 | request->request = r; | |
570 | request->data = payload; | |
571 | request->length = length; | |
572 | ||
3964a449 | 573 | request->resource.release = release_request; |
45ee3199 JF |
574 | ret = add_client_resource(client, &request->resource, GFP_ATOMIC); |
575 | if (ret < 0) | |
576 | goto failed; | |
19a15b93 KH |
577 | |
578 | e->request.type = FW_CDEV_EVENT_REQUEST; | |
579 | e->request.tcode = tcode; | |
580 | e->request.offset = offset; | |
581 | e->request.length = length; | |
3964a449 | 582 | e->request.handle = request->resource.handle; |
19a15b93 KH |
583 | e->request.closure = handler->closure; |
584 | ||
585 | queue_event(client, &e->event, | |
2d826cc5 | 586 | &e->request, sizeof(e->request), payload, length); |
45ee3199 JF |
587 | return; |
588 | ||
589 | failed: | |
590 | kfree(request); | |
591 | kfree(e); | |
592 | fw_send_response(card, r, RCODE_CONFLICT_ERROR); | |
19a15b93 KH |
593 | } |
594 | ||
53dca511 SR |
595 | static void release_address_handler(struct client *client, |
596 | struct client_resource *resource) | |
3964a449 KH |
597 | { |
598 | struct address_handler *handler = | |
599 | container_of(resource, struct address_handler, resource); | |
600 | ||
601 | fw_core_remove_address_handler(&handler->handler); | |
602 | kfree(handler); | |
603 | } | |
604 | ||
4f259223 | 605 | static int ioctl_allocate(struct client *client, void *buffer) |
19a15b93 | 606 | { |
4f259223 | 607 | struct fw_cdev_allocate *request = buffer; |
19a15b93 | 608 | struct address_handler *handler; |
19a15b93 | 609 | struct fw_address_region region; |
45ee3199 | 610 | int ret; |
19a15b93 | 611 | |
2d826cc5 | 612 | handler = kmalloc(sizeof(*handler), GFP_KERNEL); |
19a15b93 KH |
613 | if (handler == NULL) |
614 | return -ENOMEM; | |
615 | ||
4f259223 KH |
616 | region.start = request->offset; |
617 | region.end = request->offset + request->length; | |
618 | handler->handler.length = request->length; | |
19a15b93 KH |
619 | handler->handler.address_callback = handle_request; |
620 | handler->handler.callback_data = handler; | |
4f259223 | 621 | handler->closure = request->closure; |
19a15b93 KH |
622 | handler->client = client; |
623 | ||
3e0b5f0d SR |
624 | ret = fw_core_add_address_handler(&handler->handler, ®ion); |
625 | if (ret < 0) { | |
19a15b93 | 626 | kfree(handler); |
3e0b5f0d | 627 | return ret; |
19a15b93 KH |
628 | } |
629 | ||
3964a449 | 630 | handler->resource.release = release_address_handler; |
45ee3199 JF |
631 | ret = add_client_resource(client, &handler->resource, GFP_KERNEL); |
632 | if (ret < 0) { | |
633 | release_address_handler(client, &handler->resource); | |
634 | return ret; | |
635 | } | |
4f259223 | 636 | request->handle = handler->resource.handle; |
19a15b93 KH |
637 | |
638 | return 0; | |
639 | } | |
640 | ||
4f259223 | 641 | static int ioctl_deallocate(struct client *client, void *buffer) |
9472316b | 642 | { |
4f259223 | 643 | struct fw_cdev_deallocate *request = buffer; |
9472316b | 644 | |
45ee3199 JF |
645 | return release_client_resource(client, request->handle, |
646 | release_address_handler, NULL); | |
9472316b KH |
647 | } |
648 | ||
4f259223 | 649 | static int ioctl_send_response(struct client *client, void *buffer) |
19a15b93 | 650 | { |
4f259223 | 651 | struct fw_cdev_send_response *request = buffer; |
3964a449 | 652 | struct client_resource *resource; |
19a15b93 | 653 | struct request *r; |
19a15b93 | 654 | |
45ee3199 JF |
655 | if (release_client_resource(client, request->handle, |
656 | release_request, &resource) < 0) | |
19a15b93 | 657 | return -EINVAL; |
45ee3199 | 658 | |
3964a449 | 659 | r = container_of(resource, struct request, resource); |
4f259223 KH |
660 | if (request->length < r->length) |
661 | r->length = request->length; | |
662 | if (copy_from_user(r->data, u64_to_uptr(request->data), r->length)) | |
19a15b93 KH |
663 | return -EFAULT; |
664 | ||
4f259223 | 665 | fw_send_response(client->device->card, r->request, request->rcode); |
19a15b93 KH |
666 | kfree(r); |
667 | ||
668 | return 0; | |
669 | } | |
670 | ||
4f259223 | 671 | static int ioctl_initiate_bus_reset(struct client *client, void *buffer) |
5371842b | 672 | { |
4f259223 | 673 | struct fw_cdev_initiate_bus_reset *request = buffer; |
5371842b KH |
674 | int short_reset; |
675 | ||
4f259223 | 676 | short_reset = (request->type == FW_CDEV_SHORT_RESET); |
5371842b KH |
677 | |
678 | return fw_core_initiate_bus_reset(client->device->card, short_reset); | |
679 | } | |
680 | ||
66dea3e5 KH |
681 | struct descriptor { |
682 | struct fw_descriptor d; | |
3964a449 | 683 | struct client_resource resource; |
66dea3e5 KH |
684 | u32 data[0]; |
685 | }; | |
686 | ||
3964a449 KH |
687 | static void release_descriptor(struct client *client, |
688 | struct client_resource *resource) | |
689 | { | |
690 | struct descriptor *descriptor = | |
691 | container_of(resource, struct descriptor, resource); | |
692 | ||
693 | fw_core_remove_descriptor(&descriptor->d); | |
694 | kfree(descriptor); | |
695 | } | |
696 | ||
4f259223 | 697 | static int ioctl_add_descriptor(struct client *client, void *buffer) |
66dea3e5 | 698 | { |
4f259223 | 699 | struct fw_cdev_add_descriptor *request = buffer; |
66dea3e5 | 700 | struct descriptor *descriptor; |
45ee3199 | 701 | int ret; |
66dea3e5 | 702 | |
4f259223 | 703 | if (request->length > 256) |
66dea3e5 KH |
704 | return -EINVAL; |
705 | ||
706 | descriptor = | |
2d826cc5 | 707 | kmalloc(sizeof(*descriptor) + request->length * 4, GFP_KERNEL); |
66dea3e5 KH |
708 | if (descriptor == NULL) |
709 | return -ENOMEM; | |
710 | ||
711 | if (copy_from_user(descriptor->data, | |
4f259223 | 712 | u64_to_uptr(request->data), request->length * 4)) { |
45ee3199 JF |
713 | ret = -EFAULT; |
714 | goto failed; | |
66dea3e5 KH |
715 | } |
716 | ||
4f259223 KH |
717 | descriptor->d.length = request->length; |
718 | descriptor->d.immediate = request->immediate; | |
719 | descriptor->d.key = request->key; | |
66dea3e5 KH |
720 | descriptor->d.data = descriptor->data; |
721 | ||
45ee3199 JF |
722 | ret = fw_core_add_descriptor(&descriptor->d); |
723 | if (ret < 0) | |
724 | goto failed; | |
66dea3e5 | 725 | |
3964a449 | 726 | descriptor->resource.release = release_descriptor; |
45ee3199 JF |
727 | ret = add_client_resource(client, &descriptor->resource, GFP_KERNEL); |
728 | if (ret < 0) { | |
729 | fw_core_remove_descriptor(&descriptor->d); | |
730 | goto failed; | |
731 | } | |
4f259223 | 732 | request->handle = descriptor->resource.handle; |
66dea3e5 KH |
733 | |
734 | return 0; | |
45ee3199 JF |
735 | failed: |
736 | kfree(descriptor); | |
737 | ||
738 | return ret; | |
66dea3e5 KH |
739 | } |
740 | ||
4f259223 | 741 | static int ioctl_remove_descriptor(struct client *client, void *buffer) |
66dea3e5 | 742 | { |
4f259223 | 743 | struct fw_cdev_remove_descriptor *request = buffer; |
66dea3e5 | 744 | |
45ee3199 JF |
745 | return release_client_resource(client, request->handle, |
746 | release_descriptor, NULL); | |
66dea3e5 KH |
747 | } |
748 | ||
53dca511 SR |
749 | static void iso_callback(struct fw_iso_context *context, u32 cycle, |
750 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
751 | { |
752 | struct client *client = data; | |
930e4b7f | 753 | struct iso_interrupt *irq; |
19a15b93 | 754 | |
930e4b7f SR |
755 | irq = kzalloc(sizeof(*irq) + header_length, GFP_ATOMIC); |
756 | if (irq == NULL) | |
19a15b93 KH |
757 | return; |
758 | ||
930e4b7f SR |
759 | irq->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
760 | irq->interrupt.closure = client->iso_closure; | |
761 | irq->interrupt.cycle = cycle; | |
762 | irq->interrupt.header_length = header_length; | |
763 | memcpy(irq->interrupt.header, header, header_length); | |
764 | queue_event(client, &irq->event, &irq->interrupt, | |
765 | sizeof(irq->interrupt) + header_length, NULL, 0); | |
19a15b93 KH |
766 | } |
767 | ||
4f259223 | 768 | static int ioctl_create_iso_context(struct client *client, void *buffer) |
19a15b93 | 769 | { |
4f259223 | 770 | struct fw_cdev_create_iso_context *request = buffer; |
24315c5e | 771 | struct fw_iso_context *context; |
19a15b93 | 772 | |
fae60312 SR |
773 | /* We only support one context at this time. */ |
774 | if (client->iso_context != NULL) | |
775 | return -EBUSY; | |
776 | ||
4f259223 | 777 | if (request->channel > 63) |
21efb3cf KH |
778 | return -EINVAL; |
779 | ||
4f259223 | 780 | switch (request->type) { |
c70dc788 | 781 | case FW_ISO_CONTEXT_RECEIVE: |
4f259223 | 782 | if (request->header_size < 4 || (request->header_size & 3)) |
c70dc788 | 783 | return -EINVAL; |
98b6cbe8 | 784 | |
c70dc788 KH |
785 | break; |
786 | ||
787 | case FW_ISO_CONTEXT_TRANSMIT: | |
4f259223 | 788 | if (request->speed > SCODE_3200) |
c70dc788 KH |
789 | return -EINVAL; |
790 | ||
791 | break; | |
792 | ||
793 | default: | |
21efb3cf | 794 | return -EINVAL; |
c70dc788 KH |
795 | } |
796 | ||
24315c5e KH |
797 | context = fw_iso_context_create(client->device->card, |
798 | request->type, | |
799 | request->channel, | |
800 | request->speed, | |
801 | request->header_size, | |
802 | iso_callback, client); | |
803 | if (IS_ERR(context)) | |
804 | return PTR_ERR(context); | |
805 | ||
abaa5743 | 806 | client->iso_closure = request->closure; |
24315c5e | 807 | client->iso_context = context; |
19a15b93 | 808 | |
abaa5743 KH |
809 | /* We only support one context at this time. */ |
810 | request->handle = 0; | |
811 | ||
19a15b93 KH |
812 | return 0; |
813 | } | |
814 | ||
1ca31ae7 KH |
815 | /* Macros for decoding the iso packet control header. */ |
816 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) | |
817 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) | |
818 | #define GET_SKIP(v) (((v) >> 17) & 0x01) | |
7a100344 SR |
819 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
820 | #define GET_SY(v) (((v) >> 20) & 0x0f) | |
1ca31ae7 KH |
821 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
822 | ||
4f259223 | 823 | static int ioctl_queue_iso(struct client *client, void *buffer) |
19a15b93 | 824 | { |
4f259223 | 825 | struct fw_cdev_queue_iso *request = buffer; |
19a15b93 | 826 | struct fw_cdev_iso_packet __user *p, *end, *next; |
9b32d5f3 | 827 | struct fw_iso_context *ctx = client->iso_context; |
ef370ee7 | 828 | unsigned long payload, buffer_end, header_length; |
1ca31ae7 | 829 | u32 control; |
19a15b93 KH |
830 | int count; |
831 | struct { | |
832 | struct fw_iso_packet packet; | |
833 | u8 header[256]; | |
834 | } u; | |
835 | ||
abaa5743 | 836 | if (ctx == NULL || request->handle != 0) |
19a15b93 | 837 | return -EINVAL; |
19a15b93 | 838 | |
c781c06d KH |
839 | /* |
840 | * If the user passes a non-NULL data pointer, has mmap()'ed | |
19a15b93 KH |
841 | * the iso buffer, and the pointer points inside the buffer, |
842 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 843 | * set them both to 0, which will still let packets with |
19a15b93 KH |
844 | * payload_length == 0 through. In other words, if no packets |
845 | * use the indirect payload, the iso buffer need not be mapped | |
c781c06d KH |
846 | * and the request->data pointer is ignored. |
847 | */ | |
19a15b93 | 848 | |
4f259223 | 849 | payload = (unsigned long)request->data - client->vm_start; |
ef370ee7 | 850 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
4f259223 | 851 | if (request->data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 852 | payload >= buffer_end) { |
9aad8125 | 853 | payload = 0; |
ef370ee7 | 854 | buffer_end = 0; |
19a15b93 KH |
855 | } |
856 | ||
1ccc9147 AV |
857 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(request->packets); |
858 | ||
859 | if (!access_ok(VERIFY_READ, p, request->size)) | |
19a15b93 KH |
860 | return -EFAULT; |
861 | ||
4f259223 | 862 | end = (void __user *)p + request->size; |
19a15b93 KH |
863 | count = 0; |
864 | while (p < end) { | |
1ca31ae7 | 865 | if (get_user(control, &p->control)) |
19a15b93 | 866 | return -EFAULT; |
1ca31ae7 KH |
867 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
868 | u.packet.interrupt = GET_INTERRUPT(control); | |
869 | u.packet.skip = GET_SKIP(control); | |
870 | u.packet.tag = GET_TAG(control); | |
871 | u.packet.sy = GET_SY(control); | |
872 | u.packet.header_length = GET_HEADER_LENGTH(control); | |
295e3feb | 873 | |
9b32d5f3 | 874 | if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) { |
295e3feb KH |
875 | header_length = u.packet.header_length; |
876 | } else { | |
c781c06d KH |
877 | /* |
878 | * We require that header_length is a multiple of | |
879 | * the fixed header size, ctx->header_size. | |
880 | */ | |
9b32d5f3 KH |
881 | if (ctx->header_size == 0) { |
882 | if (u.packet.header_length > 0) | |
883 | return -EINVAL; | |
884 | } else if (u.packet.header_length % ctx->header_size != 0) { | |
295e3feb | 885 | return -EINVAL; |
9b32d5f3 | 886 | } |
295e3feb KH |
887 | header_length = 0; |
888 | } | |
889 | ||
19a15b93 | 890 | next = (struct fw_cdev_iso_packet __user *) |
295e3feb | 891 | &p->header[header_length / 4]; |
19a15b93 KH |
892 | if (next > end) |
893 | return -EINVAL; | |
894 | if (__copy_from_user | |
295e3feb | 895 | (u.packet.header, p->header, header_length)) |
19a15b93 | 896 | return -EFAULT; |
98b6cbe8 | 897 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
898 | u.packet.header_length + u.packet.payload_length > 0) |
899 | return -EINVAL; | |
ef370ee7 | 900 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
901 | return -EINVAL; |
902 | ||
9b32d5f3 KH |
903 | if (fw_iso_context_queue(ctx, &u.packet, |
904 | &client->buffer, payload)) | |
19a15b93 KH |
905 | break; |
906 | ||
907 | p = next; | |
908 | payload += u.packet.payload_length; | |
909 | count++; | |
910 | } | |
911 | ||
4f259223 KH |
912 | request->size -= uptr_to_u64(p) - request->packets; |
913 | request->packets = uptr_to_u64(p); | |
914 | request->data = client->vm_start + payload; | |
19a15b93 KH |
915 | |
916 | return count; | |
917 | } | |
918 | ||
4f259223 | 919 | static int ioctl_start_iso(struct client *client, void *buffer) |
19a15b93 | 920 | { |
4f259223 | 921 | struct fw_cdev_start_iso *request = buffer; |
19a15b93 | 922 | |
fae60312 | 923 | if (client->iso_context == NULL || request->handle != 0) |
abaa5743 | 924 | return -EINVAL; |
fae60312 | 925 | |
eb0306ea | 926 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE) { |
4f259223 | 927 | if (request->tags == 0 || request->tags > 15) |
eb0306ea KH |
928 | return -EINVAL; |
929 | ||
4f259223 | 930 | if (request->sync > 15) |
eb0306ea KH |
931 | return -EINVAL; |
932 | } | |
933 | ||
4f259223 KH |
934 | return fw_iso_context_start(client->iso_context, request->cycle, |
935 | request->sync, request->tags); | |
19a15b93 KH |
936 | } |
937 | ||
4f259223 | 938 | static int ioctl_stop_iso(struct client *client, void *buffer) |
b8295668 | 939 | { |
abaa5743 KH |
940 | struct fw_cdev_stop_iso *request = buffer; |
941 | ||
fae60312 | 942 | if (client->iso_context == NULL || request->handle != 0) |
abaa5743 KH |
943 | return -EINVAL; |
944 | ||
b8295668 KH |
945 | return fw_iso_context_stop(client->iso_context); |
946 | } | |
947 | ||
a64408b9 SR |
948 | static int ioctl_get_cycle_timer(struct client *client, void *buffer) |
949 | { | |
950 | struct fw_cdev_get_cycle_timer *request = buffer; | |
951 | struct fw_card *card = client->device->card; | |
952 | unsigned long long bus_time; | |
953 | struct timeval tv; | |
954 | unsigned long flags; | |
955 | ||
956 | preempt_disable(); | |
957 | local_irq_save(flags); | |
958 | ||
959 | bus_time = card->driver->get_bus_time(card); | |
960 | do_gettimeofday(&tv); | |
961 | ||
962 | local_irq_restore(flags); | |
963 | preempt_enable(); | |
964 | ||
965 | request->local_time = tv.tv_sec * 1000000ULL + tv.tv_usec; | |
966 | request->cycle_timer = bus_time & 0xffffffff; | |
967 | return 0; | |
968 | } | |
969 | ||
4f259223 KH |
970 | static int (* const ioctl_handlers[])(struct client *client, void *buffer) = { |
971 | ioctl_get_info, | |
972 | ioctl_send_request, | |
973 | ioctl_allocate, | |
974 | ioctl_deallocate, | |
975 | ioctl_send_response, | |
976 | ioctl_initiate_bus_reset, | |
977 | ioctl_add_descriptor, | |
978 | ioctl_remove_descriptor, | |
979 | ioctl_create_iso_context, | |
980 | ioctl_queue_iso, | |
981 | ioctl_start_iso, | |
982 | ioctl_stop_iso, | |
a64408b9 | 983 | ioctl_get_cycle_timer, |
4f259223 KH |
984 | }; |
985 | ||
53dca511 SR |
986 | static int dispatch_ioctl(struct client *client, |
987 | unsigned int cmd, void __user *arg) | |
19a15b93 | 988 | { |
4f259223 | 989 | char buffer[256]; |
2dbd7d7e | 990 | int ret; |
4f259223 KH |
991 | |
992 | if (_IOC_TYPE(cmd) != '#' || | |
993 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers)) | |
19a15b93 | 994 | return -EINVAL; |
4f259223 KH |
995 | |
996 | if (_IOC_DIR(cmd) & _IOC_WRITE) { | |
2d826cc5 | 997 | if (_IOC_SIZE(cmd) > sizeof(buffer) || |
4f259223 KH |
998 | copy_from_user(buffer, arg, _IOC_SIZE(cmd))) |
999 | return -EFAULT; | |
1000 | } | |
1001 | ||
2dbd7d7e SR |
1002 | ret = ioctl_handlers[_IOC_NR(cmd)](client, buffer); |
1003 | if (ret < 0) | |
1004 | return ret; | |
4f259223 KH |
1005 | |
1006 | if (_IOC_DIR(cmd) & _IOC_READ) { | |
2d826cc5 | 1007 | if (_IOC_SIZE(cmd) > sizeof(buffer) || |
4f259223 KH |
1008 | copy_to_user(arg, buffer, _IOC_SIZE(cmd))) |
1009 | return -EFAULT; | |
19a15b93 | 1010 | } |
4f259223 | 1011 | |
2dbd7d7e | 1012 | return ret; |
19a15b93 KH |
1013 | } |
1014 | ||
53dca511 SR |
1015 | static long fw_device_op_ioctl(struct file *file, |
1016 | unsigned int cmd, unsigned long arg) | |
19a15b93 KH |
1017 | { |
1018 | struct client *client = file->private_data; | |
1019 | ||
551f4cb9 JF |
1020 | if (fw_device_is_shutdown(client->device)) |
1021 | return -ENODEV; | |
1022 | ||
19a15b93 KH |
1023 | return dispatch_ioctl(client, cmd, (void __user *) arg); |
1024 | } | |
1025 | ||
1026 | #ifdef CONFIG_COMPAT | |
53dca511 SR |
1027 | static long fw_device_op_compat_ioctl(struct file *file, |
1028 | unsigned int cmd, unsigned long arg) | |
19a15b93 KH |
1029 | { |
1030 | struct client *client = file->private_data; | |
1031 | ||
551f4cb9 JF |
1032 | if (fw_device_is_shutdown(client->device)) |
1033 | return -ENODEV; | |
1034 | ||
19a15b93 KH |
1035 | return dispatch_ioctl(client, cmd, compat_ptr(arg)); |
1036 | } | |
1037 | #endif | |
1038 | ||
1039 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
1040 | { | |
1041 | struct client *client = file->private_data; | |
9aad8125 KH |
1042 | enum dma_data_direction direction; |
1043 | unsigned long size; | |
2dbd7d7e | 1044 | int page_count, ret; |
9aad8125 | 1045 | |
551f4cb9 JF |
1046 | if (fw_device_is_shutdown(client->device)) |
1047 | return -ENODEV; | |
1048 | ||
9aad8125 KH |
1049 | /* FIXME: We could support multiple buffers, but we don't. */ |
1050 | if (client->buffer.pages != NULL) | |
1051 | return -EBUSY; | |
1052 | ||
1053 | if (!(vma->vm_flags & VM_SHARED)) | |
1054 | return -EINVAL; | |
19a15b93 | 1055 | |
9aad8125 | 1056 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
1057 | return -EINVAL; |
1058 | ||
1059 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
1060 | size = vma->vm_end - vma->vm_start; |
1061 | page_count = size >> PAGE_SHIFT; | |
1062 | if (size & ~PAGE_MASK) | |
1063 | return -EINVAL; | |
1064 | ||
1065 | if (vma->vm_flags & VM_WRITE) | |
1066 | direction = DMA_TO_DEVICE; | |
1067 | else | |
1068 | direction = DMA_FROM_DEVICE; | |
1069 | ||
2dbd7d7e SR |
1070 | ret = fw_iso_buffer_init(&client->buffer, client->device->card, |
1071 | page_count, direction); | |
1072 | if (ret < 0) | |
1073 | return ret; | |
19a15b93 | 1074 | |
2dbd7d7e SR |
1075 | ret = fw_iso_buffer_map(&client->buffer, vma); |
1076 | if (ret < 0) | |
9aad8125 KH |
1077 | fw_iso_buffer_destroy(&client->buffer, client->device->card); |
1078 | ||
2dbd7d7e | 1079 | return ret; |
19a15b93 KH |
1080 | } |
1081 | ||
45ee3199 JF |
1082 | static int shutdown_resource(int id, void *p, void *data) |
1083 | { | |
1084 | struct client_resource *r = p; | |
1085 | struct client *client = data; | |
1086 | ||
1087 | r->release(client, r); | |
fb443036 | 1088 | client_put(client); |
45ee3199 JF |
1089 | |
1090 | return 0; | |
1091 | } | |
1092 | ||
19a15b93 KH |
1093 | static int fw_device_op_release(struct inode *inode, struct file *file) |
1094 | { | |
1095 | struct client *client = file->private_data; | |
2603bf21 | 1096 | struct event *e, *next_e; |
45ee3199 | 1097 | unsigned long flags; |
19a15b93 | 1098 | |
97811e34 SR |
1099 | mutex_lock(&client->device->client_list_mutex); |
1100 | list_del(&client->link); | |
1101 | mutex_unlock(&client->device->client_list_mutex); | |
1102 | ||
9aad8125 KH |
1103 | if (client->buffer.pages) |
1104 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
1105 | ||
19a15b93 KH |
1106 | if (client->iso_context) |
1107 | fw_iso_context_destroy(client->iso_context); | |
1108 | ||
45ee3199 JF |
1109 | /* Freeze client->resource_idr and client->event_list */ |
1110 | spin_lock_irqsave(&client->lock, flags); | |
1111 | client->in_shutdown = true; | |
1112 | spin_unlock_irqrestore(&client->lock, flags); | |
66dea3e5 | 1113 | |
45ee3199 JF |
1114 | idr_for_each(&client->resource_idr, shutdown_resource, client); |
1115 | idr_remove_all(&client->resource_idr); | |
1116 | idr_destroy(&client->resource_idr); | |
28cf6a04 | 1117 | |
2603bf21 KH |
1118 | list_for_each_entry_safe(e, next_e, &client->event_list, link) |
1119 | kfree(e); | |
19a15b93 | 1120 | |
fb443036 | 1121 | client_put(client); |
19a15b93 KH |
1122 | |
1123 | return 0; | |
1124 | } | |
1125 | ||
1126 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) | |
1127 | { | |
1128 | struct client *client = file->private_data; | |
2603bf21 | 1129 | unsigned int mask = 0; |
19a15b93 KH |
1130 | |
1131 | poll_wait(file, &client->wait, pt); | |
1132 | ||
2603bf21 KH |
1133 | if (fw_device_is_shutdown(client->device)) |
1134 | mask |= POLLHUP | POLLERR; | |
19a15b93 | 1135 | if (!list_empty(&client->event_list)) |
2603bf21 KH |
1136 | mask |= POLLIN | POLLRDNORM; |
1137 | ||
1138 | return mask; | |
19a15b93 KH |
1139 | } |
1140 | ||
21ebcd12 | 1141 | const struct file_operations fw_device_ops = { |
19a15b93 KH |
1142 | .owner = THIS_MODULE, |
1143 | .open = fw_device_op_open, | |
1144 | .read = fw_device_op_read, | |
1145 | .unlocked_ioctl = fw_device_op_ioctl, | |
1146 | .poll = fw_device_op_poll, | |
1147 | .release = fw_device_op_release, | |
1148 | .mmap = fw_device_op_mmap, | |
1149 | ||
1150 | #ifdef CONFIG_COMPAT | |
5af4e5ea | 1151 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
1152 | #endif |
1153 | }; |