blob: 54ef27b2adb5ac2cf5bcfb6e7c5bbbef64d67528 [file] [log] [blame]
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001/* -*- c-basic-offset: 8 -*-
2 *
3 * fw-device-cdev.c - Char device for device raw access
4 *
5 * Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software Foundation,
19 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 */
21
22#include <linux/module.h>
23#include <linux/kernel.h>
24#include <linux/wait.h>
25#include <linux/errno.h>
26#include <linux/device.h>
27#include <linux/vmalloc.h>
28#include <linux/poll.h>
29#include <linux/delay.h>
30#include <linux/mm.h>
Kristian Høgsberga3aca3d2007-03-07 12:12:44 -050031#include <linux/idr.h>
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050032#include <linux/compat.h>
33#include <asm/uaccess.h>
34#include "fw-transaction.h"
35#include "fw-topology.h"
36#include "fw-device.h"
37#include "fw-device-cdev.h"
38
39/*
40 * todo
41 *
42 * - bus resets sends a new packet with new generation and node id
43 *
44 */
45
46/* dequeue_event() just kfree()'s the event, so the event has to be
47 * the first field in the struct. */
48
49struct event {
50 struct { void *data; size_t size; } v[2];
51 struct list_head link;
52};
53
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -050054struct bus_reset {
55 struct event event;
56 struct fw_cdev_event_bus_reset reset;
57};
58
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050059struct response {
60 struct event event;
61 struct fw_transaction transaction;
62 struct client *client;
63 struct fw_cdev_event_response response;
64};
65
66struct iso_interrupt {
67 struct event event;
68 struct fw_cdev_event_iso_interrupt interrupt;
69};
70
71struct client {
Kristian Høgsberg344bbc42007-03-07 12:12:43 -050072 u32 version;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050073 struct fw_device *device;
74 spinlock_t lock;
75 struct list_head handler_list;
76 struct list_head request_list;
77 u32 request_serial;
78 struct list_head event_list;
79 struct semaphore event_list_sem;
80 wait_queue_head_t wait;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -050081
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050082 struct fw_iso_context *iso_context;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -050083 struct fw_iso_buffer buffer;
84 unsigned long vm_start;
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -050085
86 struct list_head link;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050087};
88
89static inline void __user *
90u64_to_uptr(__u64 value)
91{
92 return (void __user *)(unsigned long)value;
93}
94
95static inline __u64
96uptr_to_u64(void __user *ptr)
97{
98 return (__u64)(unsigned long)ptr;
99}
100
101static int fw_device_op_open(struct inode *inode, struct file *file)
102{
103 struct fw_device *device;
104 struct client *client;
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500105 unsigned long flags;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500106
Kristian Høgsberga3aca3d2007-03-07 12:12:44 -0500107 device = fw_device_from_devt(inode->i_rdev);
108 if (device == NULL)
109 return -ENODEV;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500110
111 client = kzalloc(sizeof *client, GFP_KERNEL);
112 if (client == NULL)
113 return -ENOMEM;
114
115 client->device = fw_device_get(device);
116 INIT_LIST_HEAD(&client->event_list);
117 sema_init(&client->event_list_sem, 0);
118 INIT_LIST_HEAD(&client->handler_list);
119 INIT_LIST_HEAD(&client->request_list);
120 spin_lock_init(&client->lock);
121 init_waitqueue_head(&client->wait);
122
123 file->private_data = client;
124
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500125 spin_lock_irqsave(&device->card->lock, flags);
126 list_add_tail(&client->link, &device->client_list);
127 spin_unlock_irqrestore(&device->card->lock, flags);
128
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500129 return 0;
130}
131
132static void queue_event(struct client *client, struct event *event,
133 void *data0, size_t size0, void *data1, size_t size1)
134{
135 unsigned long flags;
136
137 event->v[0].data = data0;
138 event->v[0].size = size0;
139 event->v[1].data = data1;
140 event->v[1].size = size1;
141
142 spin_lock_irqsave(&client->lock, flags);
143
144 list_add_tail(&event->link, &client->event_list);
145
146 up(&client->event_list_sem);
147 wake_up_interruptible(&client->wait);
148
149 spin_unlock_irqrestore(&client->lock, flags);
150}
151
152static int dequeue_event(struct client *client, char __user *buffer, size_t count)
153{
154 unsigned long flags;
155 struct event *event;
156 size_t size, total;
157 int i, retval = -EFAULT;
158
159 if (down_interruptible(&client->event_list_sem) < 0)
160 return -EINTR;
161
162 spin_lock_irqsave(&client->lock, flags);
163
164 event = container_of(client->event_list.next, struct event, link);
165 list_del(&event->link);
166
167 spin_unlock_irqrestore(&client->lock, flags);
168
169 if (buffer == NULL)
170 goto out;
171
172 total = 0;
173 for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) {
174 size = min(event->v[i].size, count - total);
175 if (copy_to_user(buffer + total, event->v[i].data, size))
176 goto out;
177 total += size;
178 }
179 retval = total;
180
181 out:
182 kfree(event);
183
184 return retval;
185}
186
187static ssize_t
188fw_device_op_read(struct file *file,
189 char __user *buffer, size_t count, loff_t *offset)
190{
191 struct client *client = file->private_data;
192
193 return dequeue_event(client, buffer, count);
194}
195
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500196static void
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500197fill_bus_reset_event(struct fw_cdev_event_bus_reset *event,
198 struct fw_device *device)
199{
200 struct fw_card *card = device->card;
201
202 event->type = FW_CDEV_EVENT_BUS_RESET;
203 event->node_id = device->node_id;
204 event->local_node_id = card->local_node->node_id;
205 event->bm_node_id = 0; /* FIXME: We don't track the BM. */
206 event->irm_node_id = card->irm_node->node_id;
207 event->root_node_id = card->root_node->node_id;
208 event->generation = card->generation;
209}
210
211static void
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500212queue_bus_reset_event(struct client *client)
213{
214 struct bus_reset *bus_reset;
215 struct fw_device *device = client->device;
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500216
217 bus_reset = kzalloc(sizeof *bus_reset, GFP_ATOMIC);
218 if (bus_reset == NULL) {
219 fw_notify("Out of memory when allocating bus reset event\n");
220 return;
221 }
222
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500223 fill_bus_reset_event(&bus_reset->reset, device);
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500224
225 queue_event(client, &bus_reset->event,
226 &bus_reset->reset, sizeof bus_reset->reset, NULL, 0);
227}
228
229void fw_device_cdev_update(struct fw_device *device)
230{
231 struct fw_card *card = device->card;
232 struct client *c;
233 unsigned long flags;
234
235 spin_lock_irqsave(&card->lock, flags);
236
237 list_for_each_entry(c, &device->client_list, link)
238 queue_bus_reset_event(c);
239
240 spin_unlock_irqrestore(&card->lock, flags);
241}
242
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500243static int ioctl_get_info(struct client *client, void __user *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500244{
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500245 struct fw_cdev_get_info get_info;
246 struct fw_cdev_event_bus_reset bus_reset;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500247
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500248 if (copy_from_user(&get_info, arg, sizeof get_info))
249 return -EFAULT;
250
251 client->version = get_info.version;
252 get_info.version = FW_CDEV_VERSION;
253
254 if (get_info.rom != 0) {
255 void __user *uptr = u64_to_uptr(get_info.rom);
256 size_t length = min(get_info.rom_length,
257 client->device->config_rom_length * 4);
258
259 if (copy_to_user(uptr, client->device->config_rom, length))
260 return -EFAULT;
261 }
262 get_info.rom_length = client->device->config_rom_length * 4;
263
264 if (get_info.bus_reset != 0) {
265 void __user *uptr = u64_to_uptr(get_info.bus_reset);
266
267 fill_bus_reset_event(&bus_reset, client->device);
268 if (copy_to_user(uptr, &bus_reset, sizeof bus_reset))
269 return -EFAULT;
270 }
271
272 if (copy_to_user(arg, &get_info, sizeof get_info))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500273 return -EFAULT;
274
275 return 0;
276}
277
278static void
279complete_transaction(struct fw_card *card, int rcode,
280 void *payload, size_t length, void *data)
281{
282 struct response *response = data;
283 struct client *client = response->client;
284
285 if (length < response->response.length)
286 response->response.length = length;
287 if (rcode == RCODE_COMPLETE)
288 memcpy(response->response.data, payload,
289 response->response.length);
290
291 response->response.type = FW_CDEV_EVENT_RESPONSE;
292 response->response.rcode = rcode;
293 queue_event(client, &response->event,
294 &response->response, sizeof response->response,
295 response->response.data, response->response.length);
296}
297
298static ssize_t ioctl_send_request(struct client *client, void __user *arg)
299{
300 struct fw_device *device = client->device;
301 struct fw_cdev_send_request request;
302 struct response *response;
303
304 if (copy_from_user(&request, arg, sizeof request))
305 return -EFAULT;
306
307 /* What is the biggest size we'll accept, really? */
308 if (request.length > 4096)
309 return -EINVAL;
310
311 response = kmalloc(sizeof *response + request.length, GFP_KERNEL);
312 if (response == NULL)
313 return -ENOMEM;
314
315 response->client = client;
316 response->response.length = request.length;
317 response->response.closure = request.closure;
318
319 if (request.data &&
320 copy_from_user(response->response.data,
321 u64_to_uptr(request.data), request.length)) {
322 kfree(response);
323 return -EFAULT;
324 }
325
326 fw_send_request(device->card, &response->transaction,
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500327 request.tcode & 0x1f,
Stefan Richter907293d2007-01-23 21:11:43 +0100328 device->node->node_id,
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500329 device->card->generation,
330 device->node->max_speed,
331 request.offset,
332 response->response.data, request.length,
333 complete_transaction, response);
334
335 if (request.data)
336 return sizeof request + request.length;
337 else
338 return sizeof request;
339}
340
341struct address_handler {
342 struct fw_address_handler handler;
343 __u64 closure;
344 struct client *client;
345 struct list_head link;
346};
347
348struct request {
349 struct fw_request *request;
350 void *data;
351 size_t length;
352 u32 serial;
353 struct list_head link;
354};
355
356struct request_event {
357 struct event event;
358 struct fw_cdev_event_request request;
359};
360
361static void
362handle_request(struct fw_card *card, struct fw_request *r,
363 int tcode, int destination, int source,
364 int generation, int speed,
365 unsigned long long offset,
366 void *payload, size_t length, void *callback_data)
367{
368 struct address_handler *handler = callback_data;
369 struct request *request;
370 struct request_event *e;
371 unsigned long flags;
372 struct client *client = handler->client;
373
374 request = kmalloc(sizeof *request, GFP_ATOMIC);
375 e = kmalloc(sizeof *e, GFP_ATOMIC);
376 if (request == NULL || e == NULL) {
377 kfree(request);
378 kfree(e);
379 fw_send_response(card, r, RCODE_CONFLICT_ERROR);
380 return;
381 }
382
383 request->request = r;
384 request->data = payload;
385 request->length = length;
386
387 spin_lock_irqsave(&client->lock, flags);
388 request->serial = client->request_serial++;
389 list_add_tail(&request->link, &client->request_list);
390 spin_unlock_irqrestore(&client->lock, flags);
391
392 e->request.type = FW_CDEV_EVENT_REQUEST;
393 e->request.tcode = tcode;
394 e->request.offset = offset;
395 e->request.length = length;
396 e->request.serial = request->serial;
397 e->request.closure = handler->closure;
398
399 queue_event(client, &e->event,
400 &e->request, sizeof e->request, payload, length);
401}
402
403static int ioctl_allocate(struct client *client, void __user *arg)
404{
405 struct fw_cdev_allocate request;
406 struct address_handler *handler;
407 unsigned long flags;
408 struct fw_address_region region;
409
410 if (copy_from_user(&request, arg, sizeof request))
411 return -EFAULT;
412
413 handler = kmalloc(sizeof *handler, GFP_KERNEL);
414 if (handler == NULL)
415 return -ENOMEM;
416
417 region.start = request.offset;
418 region.end = request.offset + request.length;
419 handler->handler.length = request.length;
420 handler->handler.address_callback = handle_request;
421 handler->handler.callback_data = handler;
422 handler->closure = request.closure;
423 handler->client = client;
424
425 if (fw_core_add_address_handler(&handler->handler, &region) < 0) {
426 kfree(handler);
427 return -EBUSY;
428 }
429
430 spin_lock_irqsave(&client->lock, flags);
431 list_add_tail(&handler->link, &client->handler_list);
432 spin_unlock_irqrestore(&client->lock, flags);
433
434 return 0;
435}
436
437static int ioctl_send_response(struct client *client, void __user *arg)
438{
439 struct fw_cdev_send_response request;
440 struct request *r;
441 unsigned long flags;
442
443 if (copy_from_user(&request, arg, sizeof request))
444 return -EFAULT;
445
446 spin_lock_irqsave(&client->lock, flags);
447 list_for_each_entry(r, &client->request_list, link) {
448 if (r->serial == request.serial) {
449 list_del(&r->link);
450 break;
451 }
452 }
453 spin_unlock_irqrestore(&client->lock, flags);
454
455 if (&r->link == &client->request_list)
456 return -EINVAL;
457
458 if (request.length < r->length)
459 r->length = request.length;
460 if (copy_from_user(r->data, u64_to_uptr(request.data), r->length))
461 return -EFAULT;
462
463 fw_send_response(client->device->card, r->request, request.rcode);
464
465 kfree(r);
466
467 return 0;
468}
469
Kristian Høgsberg53718422007-03-07 12:12:42 -0500470static int ioctl_initiate_bus_reset(struct client *client, void __user *arg)
471{
472 struct fw_cdev_initiate_bus_reset request;
473 int short_reset;
474
475 if (copy_from_user(&request, arg, sizeof request))
476 return -EFAULT;
477
478 short_reset = (request.type == FW_CDEV_SHORT_RESET);
479
480 return fw_core_initiate_bus_reset(client->device->card, short_reset);
481}
482
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500483static void
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500484iso_callback(struct fw_iso_context *context, u32 cycle,
485 size_t header_length, void *header, void *data)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500486{
487 struct client *client = data;
488 struct iso_interrupt *interrupt;
489
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500490 interrupt = kzalloc(sizeof *interrupt + header_length, GFP_ATOMIC);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500491 if (interrupt == NULL)
492 return;
493
494 interrupt->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT;
495 interrupt->interrupt.closure = 0;
496 interrupt->interrupt.cycle = cycle;
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500497 interrupt->interrupt.header_length = header_length;
498 memcpy(interrupt->interrupt.header, header, header_length);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500499 queue_event(client, &interrupt->event,
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500500 &interrupt->interrupt,
501 sizeof interrupt->interrupt + header_length, NULL, 0);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500502}
503
504static int ioctl_create_iso_context(struct client *client, void __user *arg)
505{
506 struct fw_cdev_create_iso_context request;
507
508 if (copy_from_user(&request, arg, sizeof request))
509 return -EFAULT;
510
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500511 if (request.type > FW_ISO_CONTEXT_RECEIVE)
512 return -EINVAL;
513
Kristian Høgsberg21efb3c2007-02-16 17:34:50 -0500514 if (request.channel > 63)
515 return -EINVAL;
516
Kristian Høgsberg98b6cbe2007-02-16 17:34:51 -0500517 if (request.sync > 15)
518 return -EINVAL;
519
520 if (request.tags == 0 || request.tags > 15)
521 return -EINVAL;
522
Kristian Høgsberg21efb3c2007-02-16 17:34:50 -0500523 if (request.speed > SCODE_3200)
524 return -EINVAL;
525
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500526 client->iso_context = fw_iso_context_create(client->device->card,
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500527 request.type,
Kristian Høgsberg21efb3c2007-02-16 17:34:50 -0500528 request.channel,
529 request.speed,
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500530 request.header_size,
Kristian Høgsberg98b6cbe2007-02-16 17:34:51 -0500531 request.sync,
532 request.tags,
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500533 iso_callback, client);
534 if (IS_ERR(client->iso_context))
535 return PTR_ERR(client->iso_context);
536
537 return 0;
538}
539
540static int ioctl_queue_iso(struct client *client, void __user *arg)
541{
542 struct fw_cdev_queue_iso request;
543 struct fw_cdev_iso_packet __user *p, *end, *next;
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500544 struct fw_iso_context *ctx = client->iso_context;
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500545 unsigned long payload, payload_end, header_length;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500546 int count;
547 struct {
548 struct fw_iso_packet packet;
549 u8 header[256];
550 } u;
551
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500552 if (ctx == NULL)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500553 return -EINVAL;
554 if (copy_from_user(&request, arg, sizeof request))
555 return -EFAULT;
556
557 /* If the user passes a non-NULL data pointer, has mmap()'ed
558 * the iso buffer, and the pointer points inside the buffer,
559 * we setup the payload pointers accordingly. Otherwise we
Kristian Høgsberg9aad8122007-02-16 17:34:38 -0500560 * set them both to 0, which will still let packets with
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500561 * payload_length == 0 through. In other words, if no packets
562 * use the indirect payload, the iso buffer need not be mapped
563 * and the request.data pointer is ignored.*/
564
Kristian Høgsberg9aad8122007-02-16 17:34:38 -0500565 payload = (unsigned long)request.data - client->vm_start;
566 payload_end = payload + (client->buffer.page_count << PAGE_SHIFT);
567 if (request.data == 0 || client->buffer.pages == NULL ||
568 payload >= payload_end) {
569 payload = 0;
570 payload_end = 0;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500571 }
572
573 if (!access_ok(VERIFY_READ, request.packets, request.size))
574 return -EFAULT;
575
576 p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(request.packets);
577 end = (void __user *)p + request.size;
578 count = 0;
579 while (p < end) {
580 if (__copy_from_user(&u.packet, p, sizeof *p))
581 return -EFAULT;
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500582
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500583 if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) {
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500584 header_length = u.packet.header_length;
585 } else {
586 /* We require that header_length is a multiple of
587 * the fixed header size, ctx->header_size */
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500588 if (ctx->header_size == 0) {
589 if (u.packet.header_length > 0)
590 return -EINVAL;
591 } else if (u.packet.header_length % ctx->header_size != 0) {
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500592 return -EINVAL;
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500593 }
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500594 header_length = 0;
595 }
596
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500597 next = (struct fw_cdev_iso_packet __user *)
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500598 &p->header[header_length / 4];
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500599 if (next > end)
600 return -EINVAL;
601 if (__copy_from_user
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500602 (u.packet.header, p->header, header_length))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500603 return -EFAULT;
Kristian Høgsberg98b6cbe2007-02-16 17:34:51 -0500604 if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT &&
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500605 u.packet.header_length + u.packet.payload_length > 0)
606 return -EINVAL;
607 if (payload + u.packet.payload_length > payload_end)
608 return -EINVAL;
609
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500610 if (fw_iso_context_queue(ctx, &u.packet,
611 &client->buffer, payload))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500612 break;
613
614 p = next;
615 payload += u.packet.payload_length;
616 count++;
617 }
618
619 request.size -= uptr_to_u64(p) - request.packets;
620 request.packets = uptr_to_u64(p);
Kristian Høgsberg9aad8122007-02-16 17:34:38 -0500621 request.data = client->vm_start + payload;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500622
623 if (copy_to_user(arg, &request, sizeof request))
624 return -EFAULT;
625
626 return count;
627}
628
Kristian Høgsberg69cdb722007-02-16 17:34:41 -0500629static int ioctl_start_iso(struct client *client, void __user *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500630{
Kristian Høgsberg69cdb722007-02-16 17:34:41 -0500631 struct fw_cdev_start_iso request;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500632
633 if (copy_from_user(&request, arg, sizeof request))
634 return -EFAULT;
635
Kristian Høgsberg21efb3c2007-02-16 17:34:50 -0500636 return fw_iso_context_start(client->iso_context, request.cycle);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500637}
638
Kristian Høgsbergb8295662007-02-16 17:34:42 -0500639static int ioctl_stop_iso(struct client *client, void __user *arg)
640{
641 return fw_iso_context_stop(client->iso_context);
642}
643
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500644static int
645dispatch_ioctl(struct client *client, unsigned int cmd, void __user *arg)
646{
647 switch (cmd) {
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500648 case FW_CDEV_IOC_GET_INFO:
649 return ioctl_get_info(client, arg);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500650 case FW_CDEV_IOC_SEND_REQUEST:
651 return ioctl_send_request(client, arg);
652 case FW_CDEV_IOC_ALLOCATE:
653 return ioctl_allocate(client, arg);
654 case FW_CDEV_IOC_SEND_RESPONSE:
655 return ioctl_send_response(client, arg);
Kristian Høgsberg53718422007-03-07 12:12:42 -0500656 case FW_CDEV_IOC_INITIATE_BUS_RESET:
657 return ioctl_initiate_bus_reset(client, arg);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500658 case FW_CDEV_IOC_CREATE_ISO_CONTEXT:
659 return ioctl_create_iso_context(client, arg);
660 case FW_CDEV_IOC_QUEUE_ISO:
661 return ioctl_queue_iso(client, arg);
Kristian Høgsberg69cdb722007-02-16 17:34:41 -0500662 case FW_CDEV_IOC_START_ISO:
663 return ioctl_start_iso(client, arg);
Kristian Høgsbergb8295662007-02-16 17:34:42 -0500664 case FW_CDEV_IOC_STOP_ISO:
665 return ioctl_stop_iso(client, arg);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500666 default:
667 return -EINVAL;
668 }
669}
670
671static long
672fw_device_op_ioctl(struct file *file,
673 unsigned int cmd, unsigned long arg)
674{
675 struct client *client = file->private_data;
676
677 return dispatch_ioctl(client, cmd, (void __user *) arg);
678}
679
680#ifdef CONFIG_COMPAT
681static long
682fw_device_op_compat_ioctl(struct file *file,
683 unsigned int cmd, unsigned long arg)
684{
685 struct client *client = file->private_data;
686
687 return dispatch_ioctl(client, cmd, compat_ptr(arg));
688}
689#endif
690
691static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma)
692{
693 struct client *client = file->private_data;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -0500694 enum dma_data_direction direction;
695 unsigned long size;
696 int page_count, retval;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500697
Kristian Høgsberg9aad8122007-02-16 17:34:38 -0500698 /* FIXME: We could support multiple buffers, but we don't. */
699 if (client->buffer.pages != NULL)
700 return -EBUSY;
701
702 if (!(vma->vm_flags & VM_SHARED))
703 return -EINVAL;
704
705 if (vma->vm_start & ~PAGE_MASK)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500706 return -EINVAL;
707
708 client->vm_start = vma->vm_start;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -0500709 size = vma->vm_end - vma->vm_start;
710 page_count = size >> PAGE_SHIFT;
711 if (size & ~PAGE_MASK)
712 return -EINVAL;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500713
Kristian Høgsberg9aad8122007-02-16 17:34:38 -0500714 if (vma->vm_flags & VM_WRITE)
715 direction = DMA_TO_DEVICE;
716 else
717 direction = DMA_FROM_DEVICE;
718
719 retval = fw_iso_buffer_init(&client->buffer, client->device->card,
720 page_count, direction);
721 if (retval < 0)
722 return retval;
723
724 retval = fw_iso_buffer_map(&client->buffer, vma);
725 if (retval < 0)
726 fw_iso_buffer_destroy(&client->buffer, client->device->card);
727
728 return retval;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500729}
730
731static int fw_device_op_release(struct inode *inode, struct file *file)
732{
733 struct client *client = file->private_data;
734 struct address_handler *h, *next;
735 struct request *r, *next_r;
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500736 unsigned long flags;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500737
Kristian Høgsberg9aad8122007-02-16 17:34:38 -0500738 if (client->buffer.pages)
739 fw_iso_buffer_destroy(&client->buffer, client->device->card);
740
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500741 if (client->iso_context)
742 fw_iso_context_destroy(client->iso_context);
743
744 list_for_each_entry_safe(h, next, &client->handler_list, link) {
745 fw_core_remove_address_handler(&h->handler);
746 kfree(h);
747 }
748
749 list_for_each_entry_safe(r, next_r, &client->request_list, link) {
750 fw_send_response(client->device->card, r->request,
751 RCODE_CONFLICT_ERROR);
752 kfree(r);
753 }
754
755 /* TODO: wait for all transactions to finish so
756 * complete_transaction doesn't try to queue up responses
757 * after we free client. */
758 while (!list_empty(&client->event_list))
759 dequeue_event(client, NULL, 0);
760
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500761 spin_lock_irqsave(&client->device->card->lock, flags);
762 list_del(&client->link);
763 spin_unlock_irqrestore(&client->device->card->lock, flags);
764
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500765 fw_device_put(client->device);
766 kfree(client);
767
768 return 0;
769}
770
771static unsigned int fw_device_op_poll(struct file *file, poll_table * pt)
772{
773 struct client *client = file->private_data;
774
775 poll_wait(file, &client->wait, pt);
776
777 if (!list_empty(&client->event_list))
778 return POLLIN | POLLRDNORM;
779 else
780 return 0;
781}
782
Stefan Richter21ebcd12007-01-14 15:29:07 +0100783const struct file_operations fw_device_ops = {
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500784 .owner = THIS_MODULE,
785 .open = fw_device_op_open,
786 .read = fw_device_op_read,
787 .unlocked_ioctl = fw_device_op_ioctl,
788 .poll = fw_device_op_poll,
789 .release = fw_device_op_release,
790 .mmap = fw_device_op_mmap,
791
792#ifdef CONFIG_COMPAT
Stefan Richter5af4e5e2007-01-21 20:45:32 +0100793 .compat_ioctl = fw_device_op_compat_ioctl,
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500794#endif
795};