blob: 75388641a7d34619f1a1ec1c11aa856e5d13fe6f [file] [log] [blame]
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001/*
2 * Char device for device raw access
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05003 *
Kristian Høgsbergc781c062007-05-07 20:33:32 -04004 * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net>
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05005 *
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>
23#include <linux/wait.h>
24#include <linux/errno.h>
25#include <linux/device.h>
26#include <linux/vmalloc.h>
27#include <linux/poll.h>
28#include <linux/delay.h>
29#include <linux/mm.h>
Kristian Høgsberga3aca3d2007-03-07 12:12:44 -050030#include <linux/idr.h>
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050031#include <linux/compat.h>
Kristian Høgsberg9640d3d2007-04-30 15:03:15 -040032#include <linux/firewire-cdev.h>
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050033#include <asm/uaccess.h>
34#include "fw-transaction.h"
35#include "fw-topology.h"
36#include "fw-device.h"
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050037
Kristian Høgsberg3964a442007-03-27 01:43:41 -040038struct client;
39struct client_resource {
40 struct list_head link;
41 void (*release)(struct client *client, struct client_resource *r);
42 u32 handle;
43};
44
Kristian Høgsbergc781c062007-05-07 20:33:32 -040045/*
46 * dequeue_event() just kfree()'s the event, so the event has to be
47 * the first field in the struct.
48 */
49
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050050struct event {
51 struct { void *data; size_t size; } v[2];
52 struct list_head link;
53};
54
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -050055struct bus_reset {
56 struct event event;
57 struct fw_cdev_event_bus_reset reset;
58};
59
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050060struct response {
61 struct event event;
62 struct fw_transaction transaction;
63 struct client *client;
Kristian Høgsberg3964a442007-03-27 01:43:41 -040064 struct client_resource resource;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050065 struct fw_cdev_event_response response;
66};
67
68struct iso_interrupt {
69 struct event event;
70 struct fw_cdev_event_iso_interrupt interrupt;
71};
72
73struct client {
Kristian Høgsberg344bbc42007-03-07 12:12:43 -050074 u32 version;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050075 struct fw_device *device;
76 spinlock_t lock;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +020077 u32 resource_handle;
Kristian Høgsberg3964a442007-03-27 01:43:41 -040078 struct list_head resource_list;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050079 struct list_head event_list;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050080 wait_queue_head_t wait;
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -040081 u64 bus_reset_closure;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -050082
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050083 struct fw_iso_context *iso_context;
Kristian Høgsbergabaa5742007-04-30 15:03:14 -040084 u64 iso_closure;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -050085 struct fw_iso_buffer buffer;
86 unsigned long vm_start;
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -050087
88 struct list_head link;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050089};
90
91static inline void __user *
92u64_to_uptr(__u64 value)
93{
94 return (void __user *)(unsigned long)value;
95}
96
97static inline __u64
98uptr_to_u64(void __user *ptr)
99{
100 return (__u64)(unsigned long)ptr;
101}
102
103static int fw_device_op_open(struct inode *inode, struct file *file)
104{
105 struct fw_device *device;
106 struct client *client;
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500107 unsigned long flags;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500108
Kristian Høgsberga3aca3d2007-03-07 12:12:44 -0500109 device = fw_device_from_devt(inode->i_rdev);
110 if (device == NULL)
111 return -ENODEV;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500112
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400113 client = kzalloc(sizeof(*client), GFP_KERNEL);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500114 if (client == NULL)
115 return -ENOMEM;
116
117 client->device = fw_device_get(device);
118 INIT_LIST_HEAD(&client->event_list);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400119 INIT_LIST_HEAD(&client->resource_list);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500120 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);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500145 wake_up_interruptible(&client->wait);
146
147 spin_unlock_irqrestore(&client->lock, flags);
148}
149
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500150static int
151dequeue_event(struct client *client, char __user *buffer, size_t count)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500152{
153 unsigned long flags;
154 struct event *event;
155 size_t size, total;
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500156 int i, retval;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500157
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500158 retval = wait_event_interruptible(client->wait,
159 !list_empty(&client->event_list) ||
160 fw_device_is_shutdown(client->device));
161 if (retval < 0)
162 return retval;
163
164 if (list_empty(&client->event_list) &&
165 fw_device_is_shutdown(client->device))
166 return -ENODEV;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500167
168 spin_lock_irqsave(&client->lock, flags);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500169 event = container_of(client->event_list.next, struct event, link);
170 list_del(&event->link);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500171 spin_unlock_irqrestore(&client->lock, flags);
172
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500173 total = 0;
174 for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) {
175 size = min(event->v[i].size, count - total);
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500176 if (copy_to_user(buffer + total, event->v[i].data, size)) {
177 retval = -EFAULT;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500178 goto out;
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500179 }
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500180 total += size;
181 }
182 retval = total;
183
184 out:
185 kfree(event);
186
187 return retval;
188}
189
190static ssize_t
191fw_device_op_read(struct file *file,
192 char __user *buffer, size_t count, loff_t *offset)
193{
194 struct client *client = file->private_data;
195
196 return dequeue_event(client, buffer, count);
197}
198
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500199static void
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500200fill_bus_reset_event(struct fw_cdev_event_bus_reset *event,
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -0400201 struct client *client)
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500202{
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -0400203 struct fw_card *card = client->device->card;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500204
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -0400205 event->closure = client->bus_reset_closure;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500206 event->type = FW_CDEV_EVENT_BUS_RESET;
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -0400207 event->node_id = client->device->node_id;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500208 event->local_node_id = card->local_node->node_id;
209 event->bm_node_id = 0; /* FIXME: We don't track the BM. */
210 event->irm_node_id = card->irm_node->node_id;
211 event->root_node_id = card->root_node->node_id;
212 event->generation = card->generation;
213}
214
215static void
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500216for_each_client(struct fw_device *device,
217 void (*callback)(struct client *client))
218{
219 struct fw_card *card = device->card;
220 struct client *c;
221 unsigned long flags;
222
223 spin_lock_irqsave(&card->lock, flags);
224
225 list_for_each_entry(c, &device->client_list, link)
226 callback(c);
227
228 spin_unlock_irqrestore(&card->lock, flags);
229}
230
231static void
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500232queue_bus_reset_event(struct client *client)
233{
234 struct bus_reset *bus_reset;
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500235
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400236 bus_reset = kzalloc(sizeof(*bus_reset), GFP_ATOMIC);
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500237 if (bus_reset == NULL) {
238 fw_notify("Out of memory when allocating bus reset event\n");
239 return;
240 }
241
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -0400242 fill_bus_reset_event(&bus_reset->reset, client);
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500243
244 queue_event(client, &bus_reset->event,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400245 &bus_reset->reset, sizeof(bus_reset->reset), NULL, 0);
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500246}
247
248void fw_device_cdev_update(struct fw_device *device)
249{
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500250 for_each_client(device, queue_bus_reset_event);
251}
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500252
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500253static void wake_up_client(struct client *client)
254{
255 wake_up_interruptible(&client->wait);
256}
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500257
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500258void fw_device_cdev_remove(struct fw_device *device)
259{
260 for_each_client(device, wake_up_client);
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500261}
262
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400263static int ioctl_get_info(struct client *client, void *buffer)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500264{
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400265 struct fw_cdev_get_info *get_info = buffer;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500266 struct fw_cdev_event_bus_reset bus_reset;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500267
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400268 client->version = get_info->version;
269 get_info->version = FW_CDEV_VERSION;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500270
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400271 if (get_info->rom != 0) {
272 void __user *uptr = u64_to_uptr(get_info->rom);
273 size_t want = get_info->rom_length;
Stefan Richterd84702a2007-03-20 19:42:15 +0100274 size_t have = client->device->config_rom_length * 4;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500275
Stefan Richterd84702a2007-03-20 19:42:15 +0100276 if (copy_to_user(uptr, client->device->config_rom,
277 min(want, have)))
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500278 return -EFAULT;
279 }
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400280 get_info->rom_length = client->device->config_rom_length * 4;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500281
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400282 client->bus_reset_closure = get_info->bus_reset_closure;
283 if (get_info->bus_reset != 0) {
284 void __user *uptr = u64_to_uptr(get_info->bus_reset);
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500285
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -0400286 fill_bus_reset_event(&bus_reset, client);
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400287 if (copy_to_user(uptr, &bus_reset, sizeof(bus_reset)))
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500288 return -EFAULT;
289 }
290
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400291 get_info->card = client->device->card->index;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500292
293 return 0;
294}
295
296static void
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400297add_client_resource(struct client *client, struct client_resource *resource)
298{
299 unsigned long flags;
300
301 spin_lock_irqsave(&client->lock, flags);
302 list_add_tail(&resource->link, &client->resource_list);
303 resource->handle = client->resource_handle++;
304 spin_unlock_irqrestore(&client->lock, flags);
305}
306
307static int
308release_client_resource(struct client *client, u32 handle,
309 struct client_resource **resource)
310{
311 struct client_resource *r;
312 unsigned long flags;
313
314 spin_lock_irqsave(&client->lock, flags);
315 list_for_each_entry(r, &client->resource_list, link) {
316 if (r->handle == handle) {
317 list_del(&r->link);
318 break;
319 }
320 }
321 spin_unlock_irqrestore(&client->lock, flags);
322
323 if (&r->link == &client->resource_list)
324 return -EINVAL;
325
326 if (resource)
327 *resource = r;
328 else
329 r->release(client, r);
330
331 return 0;
332}
333
334static void
335release_transaction(struct client *client, struct client_resource *resource)
336{
337 struct response *response =
338 container_of(resource, struct response, resource);
339
340 fw_cancel_transaction(client->device->card, &response->transaction);
341}
342
343static void
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500344complete_transaction(struct fw_card *card, int rcode,
345 void *payload, size_t length, void *data)
346{
347 struct response *response = data;
348 struct client *client = response->client;
Kristian Høgsberg28cf6a02007-03-07 12:12:50 -0500349 unsigned long flags;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500350
351 if (length < response->response.length)
352 response->response.length = length;
353 if (rcode == RCODE_COMPLETE)
354 memcpy(response->response.data, payload,
355 response->response.length);
356
Kristian Høgsberg28cf6a02007-03-07 12:12:50 -0500357 spin_lock_irqsave(&client->lock, flags);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400358 list_del(&response->resource.link);
Kristian Høgsberg28cf6a02007-03-07 12:12:50 -0500359 spin_unlock_irqrestore(&client->lock, flags);
360
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500361 response->response.type = FW_CDEV_EVENT_RESPONSE;
362 response->response.rcode = rcode;
363 queue_event(client, &response->event,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400364 &response->response, sizeof(response->response),
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500365 response->response.data, response->response.length);
366}
367
Jeff Garzik350958f2007-05-27 07:09:18 -0400368static int ioctl_send_request(struct client *client, void *buffer)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500369{
370 struct fw_device *device = client->device;
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400371 struct fw_cdev_send_request *request = buffer;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500372 struct response *response;
373
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500374 /* What is the biggest size we'll accept, really? */
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400375 if (request->length > 4096)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500376 return -EINVAL;
377
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400378 response = kmalloc(sizeof(*response) + request->length, GFP_KERNEL);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500379 if (response == NULL)
380 return -ENOMEM;
381
382 response->client = client;
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400383 response->response.length = request->length;
384 response->response.closure = request->closure;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500385
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400386 if (request->data &&
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500387 copy_from_user(response->response.data,
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400388 u64_to_uptr(request->data), request->length)) {
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500389 kfree(response);
390 return -EFAULT;
391 }
392
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400393 response->resource.release = release_transaction;
394 add_client_resource(client, &response->resource);
Kristian Høgsberg28cf6a02007-03-07 12:12:50 -0500395
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500396 fw_send_request(device->card, &response->transaction,
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400397 request->tcode & 0x1f,
Stefan Richter907293d2007-01-23 21:11:43 +0100398 device->node->node_id,
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400399 request->generation,
Stefan Richterf1397492007-06-10 21:31:36 +0200400 device->max_speed,
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400401 request->offset,
402 response->response.data, request->length,
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500403 complete_transaction, response);
404
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400405 if (request->data)
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400406 return sizeof(request) + request->length;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500407 else
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400408 return sizeof(request);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500409}
410
411struct address_handler {
412 struct fw_address_handler handler;
413 __u64 closure;
414 struct client *client;
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400415 struct client_resource resource;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500416};
417
418struct request {
419 struct fw_request *request;
420 void *data;
421 size_t length;
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400422 struct client_resource resource;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500423};
424
425struct request_event {
426 struct event event;
427 struct fw_cdev_event_request request;
428};
429
430static void
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400431release_request(struct client *client, struct client_resource *resource)
432{
433 struct request *request =
434 container_of(resource, struct request, resource);
435
436 fw_send_response(client->device->card, request->request,
437 RCODE_CONFLICT_ERROR);
438 kfree(request);
439}
440
441static void
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500442handle_request(struct fw_card *card, struct fw_request *r,
443 int tcode, int destination, int source,
444 int generation, int speed,
445 unsigned long long offset,
446 void *payload, size_t length, void *callback_data)
447{
448 struct address_handler *handler = callback_data;
449 struct request *request;
450 struct request_event *e;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500451 struct client *client = handler->client;
452
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400453 request = kmalloc(sizeof(*request), GFP_ATOMIC);
454 e = kmalloc(sizeof(*e), GFP_ATOMIC);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500455 if (request == NULL || e == NULL) {
456 kfree(request);
457 kfree(e);
458 fw_send_response(card, r, RCODE_CONFLICT_ERROR);
459 return;
460 }
461
462 request->request = r;
463 request->data = payload;
464 request->length = length;
465
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400466 request->resource.release = release_request;
467 add_client_resource(client, &request->resource);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500468
469 e->request.type = FW_CDEV_EVENT_REQUEST;
470 e->request.tcode = tcode;
471 e->request.offset = offset;
472 e->request.length = length;
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400473 e->request.handle = request->resource.handle;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500474 e->request.closure = handler->closure;
475
476 queue_event(client, &e->event,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400477 &e->request, sizeof(e->request), payload, length);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500478}
479
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400480static void
481release_address_handler(struct client *client,
482 struct client_resource *resource)
483{
484 struct address_handler *handler =
485 container_of(resource, struct address_handler, resource);
486
487 fw_core_remove_address_handler(&handler->handler);
488 kfree(handler);
489}
490
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400491static int ioctl_allocate(struct client *client, void *buffer)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500492{
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400493 struct fw_cdev_allocate *request = buffer;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500494 struct address_handler *handler;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500495 struct fw_address_region region;
496
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400497 handler = kmalloc(sizeof(*handler), GFP_KERNEL);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500498 if (handler == NULL)
499 return -ENOMEM;
500
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400501 region.start = request->offset;
502 region.end = request->offset + request->length;
503 handler->handler.length = request->length;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500504 handler->handler.address_callback = handle_request;
505 handler->handler.callback_data = handler;
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400506 handler->closure = request->closure;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500507 handler->client = client;
508
509 if (fw_core_add_address_handler(&handler->handler, &region) < 0) {
510 kfree(handler);
511 return -EBUSY;
512 }
513
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400514 handler->resource.release = release_address_handler;
515 add_client_resource(client, &handler->resource);
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400516 request->handle = handler->resource.handle;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500517
518 return 0;
519}
520
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400521static int ioctl_deallocate(struct client *client, void *buffer)
Kristian Høgsberg94723162007-03-14 17:34:55 -0400522{
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400523 struct fw_cdev_deallocate *request = buffer;
Kristian Høgsberg94723162007-03-14 17:34:55 -0400524
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400525 return release_client_resource(client, request->handle, NULL);
Kristian Høgsberg94723162007-03-14 17:34:55 -0400526}
527
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400528static int ioctl_send_response(struct client *client, void *buffer)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500529{
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400530 struct fw_cdev_send_response *request = buffer;
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400531 struct client_resource *resource;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500532 struct request *r;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500533
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400534 if (release_client_resource(client, request->handle, &resource) < 0)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500535 return -EINVAL;
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400536 r = container_of(resource, struct request, resource);
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400537 if (request->length < r->length)
538 r->length = request->length;
539 if (copy_from_user(r->data, u64_to_uptr(request->data), r->length))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500540 return -EFAULT;
541
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400542 fw_send_response(client->device->card, r->request, request->rcode);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500543 kfree(r);
544
545 return 0;
546}
547
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400548static int ioctl_initiate_bus_reset(struct client *client, void *buffer)
Kristian Høgsberg53718422007-03-07 12:12:42 -0500549{
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400550 struct fw_cdev_initiate_bus_reset *request = buffer;
Kristian Høgsberg53718422007-03-07 12:12:42 -0500551 int short_reset;
552
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400553 short_reset = (request->type == FW_CDEV_SHORT_RESET);
Kristian Høgsberg53718422007-03-07 12:12:42 -0500554
555 return fw_core_initiate_bus_reset(client->device->card, short_reset);
556}
557
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200558struct descriptor {
559 struct fw_descriptor d;
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400560 struct client_resource resource;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200561 u32 data[0];
562};
563
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400564static void release_descriptor(struct client *client,
565 struct client_resource *resource)
566{
567 struct descriptor *descriptor =
568 container_of(resource, struct descriptor, resource);
569
570 fw_core_remove_descriptor(&descriptor->d);
571 kfree(descriptor);
572}
573
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400574static int ioctl_add_descriptor(struct client *client, void *buffer)
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200575{
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400576 struct fw_cdev_add_descriptor *request = buffer;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200577 struct descriptor *descriptor;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200578 int retval;
579
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400580 if (request->length > 256)
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200581 return -EINVAL;
582
583 descriptor =
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400584 kmalloc(sizeof(*descriptor) + request->length * 4, GFP_KERNEL);
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200585 if (descriptor == NULL)
586 return -ENOMEM;
587
588 if (copy_from_user(descriptor->data,
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400589 u64_to_uptr(request->data), request->length * 4)) {
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200590 kfree(descriptor);
591 return -EFAULT;
592 }
593
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400594 descriptor->d.length = request->length;
595 descriptor->d.immediate = request->immediate;
596 descriptor->d.key = request->key;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200597 descriptor->d.data = descriptor->data;
598
599 retval = fw_core_add_descriptor(&descriptor->d);
600 if (retval < 0) {
601 kfree(descriptor);
602 return retval;
603 }
604
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400605 descriptor->resource.release = release_descriptor;
606 add_client_resource(client, &descriptor->resource);
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400607 request->handle = descriptor->resource.handle;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200608
609 return 0;
610}
611
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400612static int ioctl_remove_descriptor(struct client *client, void *buffer)
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200613{
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400614 struct fw_cdev_remove_descriptor *request = buffer;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200615
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400616 return release_client_resource(client, request->handle, NULL);
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200617}
618
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500619static void
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500620iso_callback(struct fw_iso_context *context, u32 cycle,
621 size_t header_length, void *header, void *data)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500622{
623 struct client *client = data;
624 struct iso_interrupt *interrupt;
625
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400626 interrupt = kzalloc(sizeof(*interrupt) + header_length, GFP_ATOMIC);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500627 if (interrupt == NULL)
628 return;
629
630 interrupt->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT;
Kristian Høgsbergabaa5742007-04-30 15:03:14 -0400631 interrupt->interrupt.closure = client->iso_closure;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500632 interrupt->interrupt.cycle = cycle;
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500633 interrupt->interrupt.header_length = header_length;
634 memcpy(interrupt->interrupt.header, header, header_length);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500635 queue_event(client, &interrupt->event,
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500636 &interrupt->interrupt,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400637 sizeof(interrupt->interrupt) + header_length, NULL, 0);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500638}
639
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400640static int ioctl_create_iso_context(struct client *client, void *buffer)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500641{
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400642 struct fw_cdev_create_iso_context *request = buffer;
Kristian Høgsberg24315c52007-06-20 17:48:07 -0400643 struct fw_iso_context *context;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500644
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400645 if (request->channel > 63)
Kristian Høgsberg21efb3c2007-02-16 17:34:50 -0500646 return -EINVAL;
647
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400648 switch (request->type) {
Kristian Høgsbergc70dc782007-03-14 17:34:53 -0400649 case FW_ISO_CONTEXT_RECEIVE:
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400650 if (request->header_size < 4 || (request->header_size & 3))
Kristian Høgsbergc70dc782007-03-14 17:34:53 -0400651 return -EINVAL;
652
653 break;
654
655 case FW_ISO_CONTEXT_TRANSMIT:
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400656 if (request->speed > SCODE_3200)
Kristian Høgsbergc70dc782007-03-14 17:34:53 -0400657 return -EINVAL;
658
659 break;
660
661 default:
Kristian Høgsberg21efb3c2007-02-16 17:34:50 -0500662 return -EINVAL;
Kristian Høgsbergc70dc782007-03-14 17:34:53 -0400663 }
664
Kristian Høgsberg24315c52007-06-20 17:48:07 -0400665 context = fw_iso_context_create(client->device->card,
666 request->type,
667 request->channel,
668 request->speed,
669 request->header_size,
670 iso_callback, client);
671 if (IS_ERR(context))
672 return PTR_ERR(context);
673
Kristian Høgsbergabaa5742007-04-30 15:03:14 -0400674 client->iso_closure = request->closure;
Kristian Høgsberg24315c52007-06-20 17:48:07 -0400675 client->iso_context = context;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500676
Kristian Høgsbergabaa5742007-04-30 15:03:14 -0400677 /* We only support one context at this time. */
678 request->handle = 0;
679
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500680 return 0;
681}
682
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -0400683/* Macros for decoding the iso packet control header. */
684#define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff)
685#define GET_INTERRUPT(v) (((v) >> 16) & 0x01)
686#define GET_SKIP(v) (((v) >> 17) & 0x01)
687#define GET_TAG(v) (((v) >> 18) & 0x02)
688#define GET_SY(v) (((v) >> 20) & 0x04)
689#define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff)
690
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400691static int ioctl_queue_iso(struct client *client, void *buffer)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500692{
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400693 struct fw_cdev_queue_iso *request = buffer;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500694 struct fw_cdev_iso_packet __user *p, *end, *next;
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500695 struct fw_iso_context *ctx = client->iso_context;
Kristian Høgsbergef370ee2007-03-28 20:46:23 +0200696 unsigned long payload, buffer_end, header_length;
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -0400697 u32 control;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500698 int count;
699 struct {
700 struct fw_iso_packet packet;
701 u8 header[256];
702 } u;
703
Kristian Høgsbergabaa5742007-04-30 15:03:14 -0400704 if (ctx == NULL || request->handle != 0)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500705 return -EINVAL;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500706
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400707 /*
708 * If the user passes a non-NULL data pointer, has mmap()'ed
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500709 * the iso buffer, and the pointer points inside the buffer,
710 * we setup the payload pointers accordingly. Otherwise we
Kristian Høgsberg9aad8122007-02-16 17:34:38 -0500711 * set them both to 0, which will still let packets with
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500712 * payload_length == 0 through. In other words, if no packets
713 * use the indirect payload, the iso buffer need not be mapped
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400714 * and the request->data pointer is ignored.
715 */
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500716
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400717 payload = (unsigned long)request->data - client->vm_start;
Kristian Høgsbergef370ee2007-03-28 20:46:23 +0200718 buffer_end = client->buffer.page_count << PAGE_SHIFT;
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400719 if (request->data == 0 || client->buffer.pages == NULL ||
Kristian Høgsbergef370ee2007-03-28 20:46:23 +0200720 payload >= buffer_end) {
Kristian Høgsberg9aad8122007-02-16 17:34:38 -0500721 payload = 0;
Kristian Høgsbergef370ee2007-03-28 20:46:23 +0200722 buffer_end = 0;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500723 }
724
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400725 if (!access_ok(VERIFY_READ, request->packets, request->size))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500726 return -EFAULT;
727
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400728 p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(request->packets);
729 end = (void __user *)p + request->size;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500730 count = 0;
731 while (p < end) {
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -0400732 if (get_user(control, &p->control))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500733 return -EFAULT;
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -0400734 u.packet.payload_length = GET_PAYLOAD_LENGTH(control);
735 u.packet.interrupt = GET_INTERRUPT(control);
736 u.packet.skip = GET_SKIP(control);
737 u.packet.tag = GET_TAG(control);
738 u.packet.sy = GET_SY(control);
739 u.packet.header_length = GET_HEADER_LENGTH(control);
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500740
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500741 if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) {
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500742 header_length = u.packet.header_length;
743 } else {
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400744 /*
745 * We require that header_length is a multiple of
746 * the fixed header size, ctx->header_size.
747 */
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500748 if (ctx->header_size == 0) {
749 if (u.packet.header_length > 0)
750 return -EINVAL;
751 } else if (u.packet.header_length % ctx->header_size != 0) {
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500752 return -EINVAL;
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500753 }
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500754 header_length = 0;
755 }
756
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500757 next = (struct fw_cdev_iso_packet __user *)
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500758 &p->header[header_length / 4];
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500759 if (next > end)
760 return -EINVAL;
761 if (__copy_from_user
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500762 (u.packet.header, p->header, header_length))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500763 return -EFAULT;
Kristian Høgsberg98b6cbe2007-02-16 17:34:51 -0500764 if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT &&
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500765 u.packet.header_length + u.packet.payload_length > 0)
766 return -EINVAL;
Kristian Høgsbergef370ee2007-03-28 20:46:23 +0200767 if (payload + u.packet.payload_length > buffer_end)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500768 return -EINVAL;
769
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500770 if (fw_iso_context_queue(ctx, &u.packet,
771 &client->buffer, payload))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500772 break;
773
774 p = next;
775 payload += u.packet.payload_length;
776 count++;
777 }
778
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400779 request->size -= uptr_to_u64(p) - request->packets;
780 request->packets = uptr_to_u64(p);
781 request->data = client->vm_start + payload;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500782
783 return count;
784}
785
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400786static int ioctl_start_iso(struct client *client, void *buffer)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500787{
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400788 struct fw_cdev_start_iso *request = buffer;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500789
Kristian Høgsbergabaa5742007-04-30 15:03:14 -0400790 if (request->handle != 0)
791 return -EINVAL;
Kristian Høgsbergeb0306e2007-03-14 17:34:54 -0400792 if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE) {
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400793 if (request->tags == 0 || request->tags > 15)
Kristian Høgsbergeb0306e2007-03-14 17:34:54 -0400794 return -EINVAL;
795
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400796 if (request->sync > 15)
Kristian Høgsbergeb0306e2007-03-14 17:34:54 -0400797 return -EINVAL;
798 }
799
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400800 return fw_iso_context_start(client->iso_context, request->cycle,
801 request->sync, request->tags);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500802}
803
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400804static int ioctl_stop_iso(struct client *client, void *buffer)
Kristian Høgsbergb8295662007-02-16 17:34:42 -0500805{
Kristian Høgsbergabaa5742007-04-30 15:03:14 -0400806 struct fw_cdev_stop_iso *request = buffer;
807
808 if (request->handle != 0)
809 return -EINVAL;
810
Kristian Høgsbergb8295662007-02-16 17:34:42 -0500811 return fw_iso_context_stop(client->iso_context);
812}
813
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400814static int (* const ioctl_handlers[])(struct client *client, void *buffer) = {
815 ioctl_get_info,
816 ioctl_send_request,
817 ioctl_allocate,
818 ioctl_deallocate,
819 ioctl_send_response,
820 ioctl_initiate_bus_reset,
821 ioctl_add_descriptor,
822 ioctl_remove_descriptor,
823 ioctl_create_iso_context,
824 ioctl_queue_iso,
825 ioctl_start_iso,
826 ioctl_stop_iso,
827};
828
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500829static int
830dispatch_ioctl(struct client *client, unsigned int cmd, void __user *arg)
831{
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400832 char buffer[256];
833 int retval;
834
835 if (_IOC_TYPE(cmd) != '#' ||
836 _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500837 return -EINVAL;
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400838
839 if (_IOC_DIR(cmd) & _IOC_WRITE) {
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400840 if (_IOC_SIZE(cmd) > sizeof(buffer) ||
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400841 copy_from_user(buffer, arg, _IOC_SIZE(cmd)))
842 return -EFAULT;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500843 }
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400844
845 retval = ioctl_handlers[_IOC_NR(cmd)](client, buffer);
846 if (retval < 0)
847 return retval;
848
849 if (_IOC_DIR(cmd) & _IOC_READ) {
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400850 if (_IOC_SIZE(cmd) > sizeof(buffer) ||
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400851 copy_to_user(arg, buffer, _IOC_SIZE(cmd)))
852 return -EFAULT;
853 }
854
855 return 0;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500856}
857
858static long
859fw_device_op_ioctl(struct file *file,
860 unsigned int cmd, unsigned long arg)
861{
862 struct client *client = file->private_data;
863
864 return dispatch_ioctl(client, cmd, (void __user *) arg);
865}
866
867#ifdef CONFIG_COMPAT
868static long
869fw_device_op_compat_ioctl(struct file *file,
870 unsigned int cmd, unsigned long arg)
871{
872 struct client *client = file->private_data;
873
874 return dispatch_ioctl(client, cmd, compat_ptr(arg));
875}
876#endif
877
878static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma)
879{
880 struct client *client = file->private_data;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -0500881 enum dma_data_direction direction;
882 unsigned long size;
883 int page_count, retval;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500884
Kristian Høgsberg9aad8122007-02-16 17:34:38 -0500885 /* FIXME: We could support multiple buffers, but we don't. */
886 if (client->buffer.pages != NULL)
887 return -EBUSY;
888
889 if (!(vma->vm_flags & VM_SHARED))
890 return -EINVAL;
891
892 if (vma->vm_start & ~PAGE_MASK)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500893 return -EINVAL;
894
895 client->vm_start = vma->vm_start;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -0500896 size = vma->vm_end - vma->vm_start;
897 page_count = size >> PAGE_SHIFT;
898 if (size & ~PAGE_MASK)
899 return -EINVAL;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500900
Kristian Høgsberg9aad8122007-02-16 17:34:38 -0500901 if (vma->vm_flags & VM_WRITE)
902 direction = DMA_TO_DEVICE;
903 else
904 direction = DMA_FROM_DEVICE;
905
906 retval = fw_iso_buffer_init(&client->buffer, client->device->card,
907 page_count, direction);
908 if (retval < 0)
909 return retval;
910
911 retval = fw_iso_buffer_map(&client->buffer, vma);
912 if (retval < 0)
913 fw_iso_buffer_destroy(&client->buffer, client->device->card);
914
915 return retval;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500916}
917
918static int fw_device_op_release(struct inode *inode, struct file *file)
919{
920 struct client *client = file->private_data;
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500921 struct event *e, *next_e;
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400922 struct client_resource *r, *next_r;
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500923 unsigned long flags;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500924
Kristian Høgsberg9aad8122007-02-16 17:34:38 -0500925 if (client->buffer.pages)
926 fw_iso_buffer_destroy(&client->buffer, client->device->card);
927
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500928 if (client->iso_context)
929 fw_iso_context_destroy(client->iso_context);
930
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400931 list_for_each_entry_safe(r, next_r, &client->resource_list, link)
932 r->release(client, r);
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200933
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400934 /*
935 * FIXME: We should wait for the async tasklets to stop
936 * running before freeing the memory.
937 */
Kristian Høgsberg28cf6a02007-03-07 12:12:50 -0500938
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500939 list_for_each_entry_safe(e, next_e, &client->event_list, link)
940 kfree(e);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500941
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500942 spin_lock_irqsave(&client->device->card->lock, flags);
943 list_del(&client->link);
944 spin_unlock_irqrestore(&client->device->card->lock, flags);
945
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500946 fw_device_put(client->device);
947 kfree(client);
948
949 return 0;
950}
951
952static unsigned int fw_device_op_poll(struct file *file, poll_table * pt)
953{
954 struct client *client = file->private_data;
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500955 unsigned int mask = 0;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500956
957 poll_wait(file, &client->wait, pt);
958
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500959 if (fw_device_is_shutdown(client->device))
960 mask |= POLLHUP | POLLERR;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500961 if (!list_empty(&client->event_list))
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500962 mask |= POLLIN | POLLRDNORM;
963
964 return mask;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500965}
966
Stefan Richter21ebcd12007-01-14 15:29:07 +0100967const struct file_operations fw_device_ops = {
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500968 .owner = THIS_MODULE,
969 .open = fw_device_op_open,
970 .read = fw_device_op_read,
971 .unlocked_ioctl = fw_device_op_ioctl,
972 .poll = fw_device_op_poll,
973 .release = fw_device_op_release,
974 .mmap = fw_device_op_mmap,
975
976#ifdef CONFIG_COMPAT
Stefan Richter5af4e5e2007-01-21 20:45:32 +0100977 .compat_ioctl = fw_device_op_compat_ioctl,
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500978#endif
979};