blob: 7eb6594cc3e5b92e9891773ada1898a4f0831c38 [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
Stefan Richterbe5bbd62009-01-04 16:23:29 +010021#include <linux/compat.h>
22#include <linux/delay.h>
23#include <linux/device.h>
24#include <linux/errno.h>
25#include <linux/firewire-cdev.h>
26#include <linux/idr.h>
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +010027#include <linux/jiffies.h>
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050028#include <linux/kernel.h>
Stefan Richterfb443032009-01-04 16:23:29 +010029#include <linux/kref.h>
Stefan Richterbe5bbd62009-01-04 16:23:29 +010030#include <linux/mm.h>
31#include <linux/module.h>
Stefan Richterd67cfb92008-10-05 10:37:11 +020032#include <linux/mutex.h>
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050033#include <linux/poll.h>
Stefan Richtera64408b2007-09-29 10:41:58 +020034#include <linux/preempt.h>
Jay Fenlasoncf417e542008-10-03 11:19:09 -040035#include <linux/spinlock.h>
Stefan Richterbe5bbd62009-01-04 16:23:29 +010036#include <linux/time.h>
37#include <linux/vmalloc.h>
38#include <linux/wait.h>
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +010039#include <linux/workqueue.h>
Stefan Richterbe5bbd62009-01-04 16:23:29 +010040
Stefan Richtera64408b2007-09-29 10:41:58 +020041#include <asm/system.h>
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050042#include <asm/uaccess.h>
Stefan Richterbe5bbd62009-01-04 16:23:29 +010043
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050044#include "fw-device.h"
Stefan Richterbe5bbd62009-01-04 16:23:29 +010045#include "fw-topology.h"
46#include "fw-transaction.h"
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050047
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050048struct client {
Kristian Høgsberg344bbc42007-03-07 12:12:43 -050049 u32 version;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050050 struct fw_device *device;
Jay Fenlason45ee3192008-12-21 16:47:17 +010051
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050052 spinlock_t lock;
Jay Fenlason45ee3192008-12-21 16:47:17 +010053 bool in_shutdown;
54 struct idr resource_idr;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050055 struct list_head event_list;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050056 wait_queue_head_t wait;
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -040057 u64 bus_reset_closure;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -050058
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050059 struct fw_iso_context *iso_context;
Kristian Høgsbergabaa5742007-04-30 15:03:14 -040060 u64 iso_closure;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -050061 struct fw_iso_buffer buffer;
62 unsigned long vm_start;
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -050063
64 struct list_head link;
Stefan Richterfb443032009-01-04 16:23:29 +010065 struct kref kref;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050066};
67
Stefan Richterfb443032009-01-04 16:23:29 +010068static inline void client_get(struct client *client)
69{
70 kref_get(&client->kref);
71}
72
73static void client_release(struct kref *kref)
74{
75 struct client *client = container_of(kref, struct client, kref);
76
77 fw_device_put(client->device);
78 kfree(client);
79}
80
81static void client_put(struct client *client)
82{
83 kref_put(&client->kref, client_release);
84}
85
Stefan Richter97c18b72009-01-04 16:23:29 +010086struct client_resource;
87typedef void (*client_resource_release_fn_t)(struct client *,
88 struct client_resource *);
89struct client_resource {
90 client_resource_release_fn_t release;
91 int handle;
92};
93
94struct address_handler_resource {
95 struct client_resource resource;
96 struct fw_address_handler handler;
97 __u64 closure;
98 struct client *client;
99};
100
101struct outbound_transaction_resource {
102 struct client_resource resource;
103 struct fw_transaction transaction;
104};
105
106struct inbound_transaction_resource {
107 struct client_resource resource;
108 struct fw_request *request;
109 void *data;
110 size_t length;
111};
112
113struct descriptor_resource {
114 struct client_resource resource;
115 struct fw_descriptor descriptor;
116 u32 data[0];
117};
118
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100119struct iso_resource {
120 struct client_resource resource;
121 struct client *client;
122 /* Schedule work and access todo only with client->lock held. */
123 struct delayed_work work;
Stefan Richter1ec3c022009-01-04 16:23:29 +0100124 enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC,
125 ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100126 int generation;
127 u64 channels;
128 s32 bandwidth;
129 struct iso_resource_event *e_alloc, *e_dealloc;
130};
131
Stefan Richter81610b82009-01-11 13:44:46 +0100132static void schedule_iso_resource(struct iso_resource *);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100133static void release_iso_resource(struct client *, struct client_resource *);
134
Stefan Richter97c18b72009-01-04 16:23:29 +0100135/*
136 * dequeue_event() just kfree()'s the event, so the event has to be
137 * the first field in a struct XYZ_event.
138 */
139struct event {
140 struct { void *data; size_t size; } v[2];
141 struct list_head link;
142};
143
144struct bus_reset_event {
145 struct event event;
146 struct fw_cdev_event_bus_reset reset;
147};
148
149struct outbound_transaction_event {
150 struct event event;
151 struct client *client;
152 struct outbound_transaction_resource r;
153 struct fw_cdev_event_response response;
154};
155
156struct inbound_transaction_event {
157 struct event event;
158 struct fw_cdev_event_request request;
159};
160
161struct iso_interrupt_event {
162 struct event event;
163 struct fw_cdev_event_iso_interrupt interrupt;
164};
165
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100166struct iso_resource_event {
167 struct event event;
168 struct fw_cdev_event_iso_resource resource;
169};
170
Stefan Richter53dca512008-12-14 21:47:04 +0100171static inline void __user *u64_to_uptr(__u64 value)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500172{
173 return (void __user *)(unsigned long)value;
174}
175
Stefan Richter53dca512008-12-14 21:47:04 +0100176static inline __u64 uptr_to_u64(void __user *ptr)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500177{
178 return (__u64)(unsigned long)ptr;
179}
180
181static int fw_device_op_open(struct inode *inode, struct file *file)
182{
183 struct fw_device *device;
184 struct client *client;
185
Stefan Richter96b19062008-02-02 15:01:09 +0100186 device = fw_device_get_by_devt(inode->i_rdev);
Kristian Høgsberga3aca3d2007-03-07 12:12:44 -0500187 if (device == NULL)
188 return -ENODEV;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500189
Jay Fenlason551f4cb2008-05-16 11:15:23 -0400190 if (fw_device_is_shutdown(device)) {
191 fw_device_put(device);
192 return -ENODEV;
193 }
194
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400195 client = kzalloc(sizeof(*client), GFP_KERNEL);
Stefan Richter96b19062008-02-02 15:01:09 +0100196 if (client == NULL) {
197 fw_device_put(device);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500198 return -ENOMEM;
Stefan Richter96b19062008-02-02 15:01:09 +0100199 }
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500200
Stefan Richter96b19062008-02-02 15:01:09 +0100201 client->device = device;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500202 spin_lock_init(&client->lock);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100203 idr_init(&client->resource_idr);
204 INIT_LIST_HEAD(&client->event_list);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500205 init_waitqueue_head(&client->wait);
Stefan Richterfb443032009-01-04 16:23:29 +0100206 kref_init(&client->kref);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500207
208 file->private_data = client;
209
Stefan Richterd67cfb92008-10-05 10:37:11 +0200210 mutex_lock(&device->client_list_mutex);
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500211 list_add_tail(&client->link, &device->client_list);
Stefan Richterd67cfb92008-10-05 10:37:11 +0200212 mutex_unlock(&device->client_list_mutex);
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500213
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500214 return 0;
215}
216
217static void queue_event(struct client *client, struct event *event,
218 void *data0, size_t size0, void *data1, size_t size1)
219{
220 unsigned long flags;
221
222 event->v[0].data = data0;
223 event->v[0].size = size0;
224 event->v[1].data = data1;
225 event->v[1].size = size1;
226
227 spin_lock_irqsave(&client->lock, flags);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100228 if (client->in_shutdown)
229 kfree(event);
230 else
231 list_add_tail(&event->link, &client->event_list);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500232 spin_unlock_irqrestore(&client->lock, flags);
Jay Fenlason83431cb2007-10-08 17:00:29 -0400233
234 wake_up_interruptible(&client->wait);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500235}
236
Stefan Richter53dca512008-12-14 21:47:04 +0100237static int dequeue_event(struct client *client,
238 char __user *buffer, size_t count)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500239{
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500240 struct event *event;
241 size_t size, total;
Stefan Richter2dbd7d72008-12-14 21:45:45 +0100242 int i, ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500243
Stefan Richter2dbd7d72008-12-14 21:45:45 +0100244 ret = wait_event_interruptible(client->wait,
245 !list_empty(&client->event_list) ||
246 fw_device_is_shutdown(client->device));
247 if (ret < 0)
248 return ret;
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500249
250 if (list_empty(&client->event_list) &&
251 fw_device_is_shutdown(client->device))
252 return -ENODEV;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500253
Stefan Richter3ba94982009-01-04 16:23:29 +0100254 spin_lock_irq(&client->lock);
Stefan Richtera459b8a2008-12-21 16:49:57 +0100255 event = list_first_entry(&client->event_list, struct event, link);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500256 list_del(&event->link);
Stefan Richter3ba94982009-01-04 16:23:29 +0100257 spin_unlock_irq(&client->lock);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500258
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500259 total = 0;
260 for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) {
261 size = min(event->v[i].size, count - total);
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500262 if (copy_to_user(buffer + total, event->v[i].data, size)) {
Stefan Richter2dbd7d72008-12-14 21:45:45 +0100263 ret = -EFAULT;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500264 goto out;
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500265 }
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500266 total += size;
267 }
Stefan Richter2dbd7d72008-12-14 21:45:45 +0100268 ret = total;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500269
270 out:
271 kfree(event);
272
Stefan Richter2dbd7d72008-12-14 21:45:45 +0100273 return ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500274}
275
Stefan Richter53dca512008-12-14 21:47:04 +0100276static ssize_t fw_device_op_read(struct file *file, char __user *buffer,
277 size_t count, loff_t *offset)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500278{
279 struct client *client = file->private_data;
280
281 return dequeue_event(client, buffer, count);
282}
283
Stefan Richter53dca512008-12-14 21:47:04 +0100284static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event,
285 struct client *client)
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500286{
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -0400287 struct fw_card *card = client->device->card;
Jay Fenlasoncf417e542008-10-03 11:19:09 -0400288
Stefan Richter3ba94982009-01-04 16:23:29 +0100289 spin_lock_irq(&card->lock);
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500290
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -0400291 event->closure = client->bus_reset_closure;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500292 event->type = FW_CDEV_EVENT_BUS_RESET;
Stefan Richtercf5a56a2008-01-24 01:53:51 +0100293 event->generation = client->device->generation;
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -0400294 event->node_id = client->device->node_id;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500295 event->local_node_id = card->local_node->node_id;
296 event->bm_node_id = 0; /* FIXME: We don't track the BM. */
297 event->irm_node_id = card->irm_node->node_id;
298 event->root_node_id = card->root_node->node_id;
Jay Fenlasoncf417e542008-10-03 11:19:09 -0400299
Stefan Richter3ba94982009-01-04 16:23:29 +0100300 spin_unlock_irq(&card->lock);
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500301}
302
Stefan Richter53dca512008-12-14 21:47:04 +0100303static void for_each_client(struct fw_device *device,
304 void (*callback)(struct client *client))
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500305{
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500306 struct client *c;
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500307
Stefan Richterd67cfb92008-10-05 10:37:11 +0200308 mutex_lock(&device->client_list_mutex);
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500309 list_for_each_entry(c, &device->client_list, link)
310 callback(c);
Stefan Richterd67cfb92008-10-05 10:37:11 +0200311 mutex_unlock(&device->client_list_mutex);
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500312}
313
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100314static int schedule_reallocations(int id, void *p, void *data)
315{
316 struct client_resource *r = p;
317
318 if (r->release == release_iso_resource)
319 schedule_iso_resource(container_of(r,
320 struct iso_resource, resource));
321 return 0;
322}
323
Stefan Richter53dca512008-12-14 21:47:04 +0100324static void queue_bus_reset_event(struct client *client)
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500325{
Stefan Richter97c18b72009-01-04 16:23:29 +0100326 struct bus_reset_event *e;
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500327
Stefan Richter97c18b72009-01-04 16:23:29 +0100328 e = kzalloc(sizeof(*e), GFP_KERNEL);
329 if (e == NULL) {
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500330 fw_notify("Out of memory when allocating bus reset event\n");
331 return;
332 }
333
Stefan Richter97c18b72009-01-04 16:23:29 +0100334 fill_bus_reset_event(&e->reset, client);
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500335
Stefan Richter97c18b72009-01-04 16:23:29 +0100336 queue_event(client, &e->event,
337 &e->reset, sizeof(e->reset), NULL, 0);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100338
339 spin_lock_irq(&client->lock);
340 idr_for_each(&client->resource_idr, schedule_reallocations, client);
341 spin_unlock_irq(&client->lock);
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500342}
343
344void fw_device_cdev_update(struct fw_device *device)
345{
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500346 for_each_client(device, queue_bus_reset_event);
347}
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500348
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500349static void wake_up_client(struct client *client)
350{
351 wake_up_interruptible(&client->wait);
352}
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500353
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500354void fw_device_cdev_remove(struct fw_device *device)
355{
356 for_each_client(device, wake_up_client);
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500357}
358
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400359static int ioctl_get_info(struct client *client, void *buffer)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500360{
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400361 struct fw_cdev_get_info *get_info = buffer;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500362 struct fw_cdev_event_bus_reset bus_reset;
Stefan Richterc9755e12008-03-24 20:54:28 +0100363 unsigned long ret = 0;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500364
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400365 client->version = get_info->version;
366 get_info->version = FW_CDEV_VERSION;
Jay Fenlasoncf417e542008-10-03 11:19:09 -0400367 get_info->card = client->device->card->index;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500368
Stefan Richterc9755e12008-03-24 20:54:28 +0100369 down_read(&fw_device_rwsem);
370
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400371 if (get_info->rom != 0) {
372 void __user *uptr = u64_to_uptr(get_info->rom);
373 size_t want = get_info->rom_length;
Stefan Richterd84702a2007-03-20 19:42:15 +0100374 size_t have = client->device->config_rom_length * 4;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500375
Stefan Richterc9755e12008-03-24 20:54:28 +0100376 ret = copy_to_user(uptr, client->device->config_rom,
377 min(want, have));
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500378 }
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400379 get_info->rom_length = client->device->config_rom_length * 4;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500380
Stefan Richterc9755e12008-03-24 20:54:28 +0100381 up_read(&fw_device_rwsem);
382
383 if (ret != 0)
384 return -EFAULT;
385
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400386 client->bus_reset_closure = get_info->bus_reset_closure;
387 if (get_info->bus_reset != 0) {
388 void __user *uptr = u64_to_uptr(get_info->bus_reset);
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500389
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -0400390 fill_bus_reset_event(&bus_reset, client);
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400391 if (copy_to_user(uptr, &bus_reset, sizeof(bus_reset)))
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500392 return -EFAULT;
393 }
394
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500395 return 0;
396}
397
Stefan Richter53dca512008-12-14 21:47:04 +0100398static int add_client_resource(struct client *client,
399 struct client_resource *resource, gfp_t gfp_mask)
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400400{
401 unsigned long flags;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100402 int ret;
403
404 retry:
405 if (idr_pre_get(&client->resource_idr, gfp_mask) == 0)
406 return -ENOMEM;
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400407
408 spin_lock_irqsave(&client->lock, flags);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100409 if (client->in_shutdown)
410 ret = -ECANCELED;
411 else
412 ret = idr_get_new(&client->resource_idr, resource,
413 &resource->handle);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100414 if (ret >= 0) {
Stefan Richterfb443032009-01-04 16:23:29 +0100415 client_get(client);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100416 if (resource->release == release_iso_resource)
417 schedule_iso_resource(container_of(resource,
418 struct iso_resource, resource));
419 }
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400420 spin_unlock_irqrestore(&client->lock, flags);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100421
422 if (ret == -EAGAIN)
423 goto retry;
424
425 return ret < 0 ? ret : 0;
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400426}
427
Stefan Richter53dca512008-12-14 21:47:04 +0100428static int release_client_resource(struct client *client, u32 handle,
429 client_resource_release_fn_t release,
430 struct client_resource **resource)
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400431{
432 struct client_resource *r;
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400433
Stefan Richter3ba94982009-01-04 16:23:29 +0100434 spin_lock_irq(&client->lock);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100435 if (client->in_shutdown)
436 r = NULL;
437 else
438 r = idr_find(&client->resource_idr, handle);
439 if (r && r->release == release)
440 idr_remove(&client->resource_idr, handle);
Stefan Richter3ba94982009-01-04 16:23:29 +0100441 spin_unlock_irq(&client->lock);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400442
Jay Fenlason45ee3192008-12-21 16:47:17 +0100443 if (!(r && r->release == release))
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400444 return -EINVAL;
445
446 if (resource)
447 *resource = r;
448 else
449 r->release(client, r);
450
Stefan Richterfb443032009-01-04 16:23:29 +0100451 client_put(client);
452
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400453 return 0;
454}
455
Stefan Richter53dca512008-12-14 21:47:04 +0100456static void release_transaction(struct client *client,
457 struct client_resource *resource)
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400458{
Stefan Richter97c18b72009-01-04 16:23:29 +0100459 struct outbound_transaction_resource *r = container_of(resource,
460 struct outbound_transaction_resource, resource);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400461
Stefan Richter97c18b72009-01-04 16:23:29 +0100462 fw_cancel_transaction(client->device->card, &r->transaction);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400463}
464
Stefan Richter53dca512008-12-14 21:47:04 +0100465static void complete_transaction(struct fw_card *card, int rcode,
466 void *payload, size_t length, void *data)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500467{
Stefan Richter97c18b72009-01-04 16:23:29 +0100468 struct outbound_transaction_event *e = data;
469 struct fw_cdev_event_response *rsp = &e->response;
470 struct client *client = e->client;
Kristian Høgsberg28cf6a02007-03-07 12:12:50 -0500471 unsigned long flags;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500472
Stefan Richter97c18b72009-01-04 16:23:29 +0100473 if (length < rsp->length)
474 rsp->length = length;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500475 if (rcode == RCODE_COMPLETE)
Stefan Richter97c18b72009-01-04 16:23:29 +0100476 memcpy(rsp->data, payload, rsp->length);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500477
Kristian Høgsberg28cf6a02007-03-07 12:12:50 -0500478 spin_lock_irqsave(&client->lock, flags);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100479 /*
Stefan Richterfb443032009-01-04 16:23:29 +0100480 * 1. If called while in shutdown, the idr tree must be left untouched.
481 * The idr handle will be removed and the client reference will be
482 * dropped later.
483 * 2. If the call chain was release_client_resource ->
484 * release_transaction -> complete_transaction (instead of a normal
485 * conclusion of the transaction), i.e. if this resource was already
486 * unregistered from the idr, the client reference will be dropped
487 * by release_client_resource and we must not drop it here.
Jay Fenlason45ee3192008-12-21 16:47:17 +0100488 */
Stefan Richterfb443032009-01-04 16:23:29 +0100489 if (!client->in_shutdown &&
Stefan Richter97c18b72009-01-04 16:23:29 +0100490 idr_find(&client->resource_idr, e->r.resource.handle)) {
491 idr_remove(&client->resource_idr, e->r.resource.handle);
Stefan Richterfb443032009-01-04 16:23:29 +0100492 /* Drop the idr's reference */
493 client_put(client);
494 }
Kristian Høgsberg28cf6a02007-03-07 12:12:50 -0500495 spin_unlock_irqrestore(&client->lock, flags);
496
Stefan Richter97c18b72009-01-04 16:23:29 +0100497 rsp->type = FW_CDEV_EVENT_RESPONSE;
498 rsp->rcode = rcode;
David Moore8401d922008-07-29 23:46:25 -0700499
500 /*
Stefan Richter97c18b72009-01-04 16:23:29 +0100501 * In the case that sizeof(*rsp) doesn't align with the position of the
David Moore8401d922008-07-29 23:46:25 -0700502 * data, and the read is short, preserve an extra copy of the data
503 * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless
504 * for short reads and some apps depended on it, this is both safe
505 * and prudent for compatibility.
506 */
Stefan Richter97c18b72009-01-04 16:23:29 +0100507 if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data))
508 queue_event(client, &e->event, rsp, sizeof(*rsp),
509 rsp->data, rsp->length);
David Moore8401d922008-07-29 23:46:25 -0700510 else
Stefan Richter97c18b72009-01-04 16:23:29 +0100511 queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length,
David Moore8401d922008-07-29 23:46:25 -0700512 NULL, 0);
Stefan Richterfb443032009-01-04 16:23:29 +0100513
514 /* Drop the transaction callback's reference */
515 client_put(client);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500516}
517
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +0100518static int init_request(struct client *client,
519 struct fw_cdev_send_request *request,
520 int destination_id, int speed)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500521{
Stefan Richter97c18b72009-01-04 16:23:29 +0100522 struct outbound_transaction_event *e;
Stefan Richter1f3125a2008-12-05 22:44:42 +0100523 int ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500524
Stefan Richter18e9b102009-03-10 21:02:21 +0100525 if (request->tcode != TCODE_STREAM_DATA &&
526 (request->length > 4096 || request->length > 512 << speed))
Stefan Richter5d3fd692009-01-04 16:23:29 +0100527 return -EIO;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500528
Stefan Richter97c18b72009-01-04 16:23:29 +0100529 e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL);
530 if (e == NULL)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500531 return -ENOMEM;
532
Stefan Richter97c18b72009-01-04 16:23:29 +0100533 e->client = client;
534 e->response.length = request->length;
535 e->response.closure = request->closure;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500536
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400537 if (request->data &&
Stefan Richter97c18b72009-01-04 16:23:29 +0100538 copy_from_user(e->response.data,
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400539 u64_to_uptr(request->data), request->length)) {
Stefan Richter1f3125a2008-12-05 22:44:42 +0100540 ret = -EFAULT;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100541 goto failed;
Stefan Richter1f3125a2008-12-05 22:44:42 +0100542 }
543
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +0100544 e->r.resource.release = release_transaction;
545 ret = add_client_resource(client, &e->r.resource, GFP_KERNEL);
546 if (ret < 0)
547 goto failed;
548
549 /* Get a reference for the transaction callback */
550 client_get(client);
551
552 fw_send_request(client->device->card, &e->r.transaction,
Stefan Richter664d8012009-03-10 21:01:54 +0100553 request->tcode, destination_id, request->generation,
554 speed, request->offset, e->response.data,
555 request->length, complete_transaction, e);
556 return 0;
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +0100557
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +0100558 failed:
559 kfree(e);
560
561 return ret;
562}
563
564static int ioctl_send_request(struct client *client, void *buffer)
565{
566 struct fw_cdev_send_request *request = buffer;
567
Stefan Richter1f3125a2008-12-05 22:44:42 +0100568 switch (request->tcode) {
569 case TCODE_WRITE_QUADLET_REQUEST:
570 case TCODE_WRITE_BLOCK_REQUEST:
571 case TCODE_READ_QUADLET_REQUEST:
572 case TCODE_READ_BLOCK_REQUEST:
573 case TCODE_LOCK_MASK_SWAP:
574 case TCODE_LOCK_COMPARE_SWAP:
575 case TCODE_LOCK_FETCH_ADD:
576 case TCODE_LOCK_LITTLE_ADD:
577 case TCODE_LOCK_BOUNDED_ADD:
578 case TCODE_LOCK_WRAP_ADD:
579 case TCODE_LOCK_VENDOR_DEPENDENT:
580 break;
581 default:
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +0100582 return -EINVAL;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500583 }
584
Stefan Richter207fbef2009-03-10 21:01:08 +0100585 return init_request(client, request, client->device->node_id,
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +0100586 client->device->max_speed);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500587}
588
Stefan Richter53dca512008-12-14 21:47:04 +0100589static void release_request(struct client *client,
590 struct client_resource *resource)
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400591{
Stefan Richter97c18b72009-01-04 16:23:29 +0100592 struct inbound_transaction_resource *r = container_of(resource,
593 struct inbound_transaction_resource, resource);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400594
Stefan Richter97c18b72009-01-04 16:23:29 +0100595 fw_send_response(client->device->card, r->request,
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400596 RCODE_CONFLICT_ERROR);
Stefan Richter97c18b72009-01-04 16:23:29 +0100597 kfree(r);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400598}
599
Stefan Richter97c18b72009-01-04 16:23:29 +0100600static void handle_request(struct fw_card *card, struct fw_request *request,
Stefan Richter53dca512008-12-14 21:47:04 +0100601 int tcode, int destination, int source,
602 int generation, int speed,
603 unsigned long long offset,
604 void *payload, size_t length, void *callback_data)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500605{
Stefan Richter97c18b72009-01-04 16:23:29 +0100606 struct address_handler_resource *handler = callback_data;
607 struct inbound_transaction_resource *r;
608 struct inbound_transaction_event *e;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100609 int ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500610
Stefan Richter97c18b72009-01-04 16:23:29 +0100611 r = kmalloc(sizeof(*r), GFP_ATOMIC);
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400612 e = kmalloc(sizeof(*e), GFP_ATOMIC);
Stefan Richter97c18b72009-01-04 16:23:29 +0100613 if (r == NULL || e == NULL)
Jay Fenlason45ee3192008-12-21 16:47:17 +0100614 goto failed;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500615
Stefan Richter97c18b72009-01-04 16:23:29 +0100616 r->request = request;
617 r->data = payload;
618 r->length = length;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500619
Stefan Richter97c18b72009-01-04 16:23:29 +0100620 r->resource.release = release_request;
621 ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100622 if (ret < 0)
623 goto failed;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500624
625 e->request.type = FW_CDEV_EVENT_REQUEST;
626 e->request.tcode = tcode;
627 e->request.offset = offset;
628 e->request.length = length;
Stefan Richter97c18b72009-01-04 16:23:29 +0100629 e->request.handle = r->resource.handle;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500630 e->request.closure = handler->closure;
631
Stefan Richter97c18b72009-01-04 16:23:29 +0100632 queue_event(handler->client, &e->event,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400633 &e->request, sizeof(e->request), payload, length);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100634 return;
635
636 failed:
Stefan Richter97c18b72009-01-04 16:23:29 +0100637 kfree(r);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100638 kfree(e);
Stefan Richter97c18b72009-01-04 16:23:29 +0100639 fw_send_response(card, request, RCODE_CONFLICT_ERROR);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500640}
641
Stefan Richter53dca512008-12-14 21:47:04 +0100642static void release_address_handler(struct client *client,
643 struct client_resource *resource)
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400644{
Stefan Richter97c18b72009-01-04 16:23:29 +0100645 struct address_handler_resource *r =
646 container_of(resource, struct address_handler_resource, resource);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400647
Stefan Richter97c18b72009-01-04 16:23:29 +0100648 fw_core_remove_address_handler(&r->handler);
649 kfree(r);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400650}
651
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400652static int ioctl_allocate(struct client *client, void *buffer)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500653{
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400654 struct fw_cdev_allocate *request = buffer;
Stefan Richter97c18b72009-01-04 16:23:29 +0100655 struct address_handler_resource *r;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500656 struct fw_address_region region;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100657 int ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500658
Stefan Richter97c18b72009-01-04 16:23:29 +0100659 r = kmalloc(sizeof(*r), GFP_KERNEL);
660 if (r == NULL)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500661 return -ENOMEM;
662
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400663 region.start = request->offset;
664 region.end = request->offset + request->length;
Stefan Richter97c18b72009-01-04 16:23:29 +0100665 r->handler.length = request->length;
666 r->handler.address_callback = handle_request;
667 r->handler.callback_data = r;
668 r->closure = request->closure;
669 r->client = client;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500670
Stefan Richter97c18b72009-01-04 16:23:29 +0100671 ret = fw_core_add_address_handler(&r->handler, &region);
Stefan Richter3e0b5f02008-12-14 19:21:01 +0100672 if (ret < 0) {
Stefan Richter97c18b72009-01-04 16:23:29 +0100673 kfree(r);
Stefan Richter3e0b5f02008-12-14 19:21:01 +0100674 return ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500675 }
676
Stefan Richter97c18b72009-01-04 16:23:29 +0100677 r->resource.release = release_address_handler;
678 ret = add_client_resource(client, &r->resource, GFP_KERNEL);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100679 if (ret < 0) {
Stefan Richter97c18b72009-01-04 16:23:29 +0100680 release_address_handler(client, &r->resource);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100681 return ret;
682 }
Stefan Richter97c18b72009-01-04 16:23:29 +0100683 request->handle = r->resource.handle;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500684
685 return 0;
686}
687
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400688static int ioctl_deallocate(struct client *client, void *buffer)
Kristian Høgsberg94723162007-03-14 17:34:55 -0400689{
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400690 struct fw_cdev_deallocate *request = buffer;
Kristian Høgsberg94723162007-03-14 17:34:55 -0400691
Jay Fenlason45ee3192008-12-21 16:47:17 +0100692 return release_client_resource(client, request->handle,
693 release_address_handler, NULL);
Kristian Høgsberg94723162007-03-14 17:34:55 -0400694}
695
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400696static int ioctl_send_response(struct client *client, void *buffer)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500697{
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400698 struct fw_cdev_send_response *request = buffer;
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400699 struct client_resource *resource;
Stefan Richter97c18b72009-01-04 16:23:29 +0100700 struct inbound_transaction_resource *r;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500701
Jay Fenlason45ee3192008-12-21 16:47:17 +0100702 if (release_client_resource(client, request->handle,
703 release_request, &resource) < 0)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500704 return -EINVAL;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100705
Stefan Richter97c18b72009-01-04 16:23:29 +0100706 r = container_of(resource, struct inbound_transaction_resource,
707 resource);
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400708 if (request->length < r->length)
709 r->length = request->length;
710 if (copy_from_user(r->data, u64_to_uptr(request->data), r->length))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500711 return -EFAULT;
712
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400713 fw_send_response(client->device->card, r->request, request->rcode);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500714 kfree(r);
715
716 return 0;
717}
718
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400719static int ioctl_initiate_bus_reset(struct client *client, void *buffer)
Kristian Høgsberg53718422007-03-07 12:12:42 -0500720{
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400721 struct fw_cdev_initiate_bus_reset *request = buffer;
Kristian Høgsberg53718422007-03-07 12:12:42 -0500722 int short_reset;
723
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400724 short_reset = (request->type == FW_CDEV_SHORT_RESET);
Kristian Høgsberg53718422007-03-07 12:12:42 -0500725
726 return fw_core_initiate_bus_reset(client->device->card, short_reset);
727}
728
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400729static void release_descriptor(struct client *client,
730 struct client_resource *resource)
731{
Stefan Richter97c18b72009-01-04 16:23:29 +0100732 struct descriptor_resource *r =
733 container_of(resource, struct descriptor_resource, resource);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400734
Stefan Richter97c18b72009-01-04 16:23:29 +0100735 fw_core_remove_descriptor(&r->descriptor);
736 kfree(r);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400737}
738
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400739static int ioctl_add_descriptor(struct client *client, void *buffer)
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200740{
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400741 struct fw_cdev_add_descriptor *request = buffer;
Stefan Richterde487da2009-03-10 21:00:23 +0100742 struct fw_card *card = client->device->card;
Stefan Richter97c18b72009-01-04 16:23:29 +0100743 struct descriptor_resource *r;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100744 int ret;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200745
Stefan Richterde487da2009-03-10 21:00:23 +0100746 /* Access policy: Allow this ioctl only on local nodes' device files. */
747 spin_lock_irq(&card->lock);
748 ret = client->device->node_id != card->local_node->node_id;
749 spin_unlock_irq(&card->lock);
750 if (ret)
751 return -ENOSYS;
752
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400753 if (request->length > 256)
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200754 return -EINVAL;
755
Stefan Richter97c18b72009-01-04 16:23:29 +0100756 r = kmalloc(sizeof(*r) + request->length * 4, GFP_KERNEL);
757 if (r == NULL)
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200758 return -ENOMEM;
759
Stefan Richter97c18b72009-01-04 16:23:29 +0100760 if (copy_from_user(r->data,
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400761 u64_to_uptr(request->data), request->length * 4)) {
Jay Fenlason45ee3192008-12-21 16:47:17 +0100762 ret = -EFAULT;
763 goto failed;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200764 }
765
Stefan Richter97c18b72009-01-04 16:23:29 +0100766 r->descriptor.length = request->length;
767 r->descriptor.immediate = request->immediate;
768 r->descriptor.key = request->key;
769 r->descriptor.data = r->data;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200770
Stefan Richter97c18b72009-01-04 16:23:29 +0100771 ret = fw_core_add_descriptor(&r->descriptor);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100772 if (ret < 0)
773 goto failed;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200774
Stefan Richter97c18b72009-01-04 16:23:29 +0100775 r->resource.release = release_descriptor;
776 ret = add_client_resource(client, &r->resource, GFP_KERNEL);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100777 if (ret < 0) {
Stefan Richter97c18b72009-01-04 16:23:29 +0100778 fw_core_remove_descriptor(&r->descriptor);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100779 goto failed;
780 }
Stefan Richter97c18b72009-01-04 16:23:29 +0100781 request->handle = r->resource.handle;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200782
783 return 0;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100784 failed:
Stefan Richter97c18b72009-01-04 16:23:29 +0100785 kfree(r);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100786
787 return ret;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200788}
789
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400790static int ioctl_remove_descriptor(struct client *client, void *buffer)
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200791{
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400792 struct fw_cdev_remove_descriptor *request = buffer;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200793
Jay Fenlason45ee3192008-12-21 16:47:17 +0100794 return release_client_resource(client, request->handle,
795 release_descriptor, NULL);
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200796}
797
Stefan Richter53dca512008-12-14 21:47:04 +0100798static void iso_callback(struct fw_iso_context *context, u32 cycle,
799 size_t header_length, void *header, void *data)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500800{
801 struct client *client = data;
Stefan Richter97c18b72009-01-04 16:23:29 +0100802 struct iso_interrupt_event *e;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500803
Stefan Richter97c18b72009-01-04 16:23:29 +0100804 e = kzalloc(sizeof(*e) + header_length, GFP_ATOMIC);
805 if (e == NULL)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500806 return;
807
Stefan Richter97c18b72009-01-04 16:23:29 +0100808 e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT;
809 e->interrupt.closure = client->iso_closure;
810 e->interrupt.cycle = cycle;
811 e->interrupt.header_length = header_length;
812 memcpy(e->interrupt.header, header, header_length);
813 queue_event(client, &e->event, &e->interrupt,
814 sizeof(e->interrupt) + header_length, NULL, 0);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500815}
816
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400817static int ioctl_create_iso_context(struct client *client, void *buffer)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500818{
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400819 struct fw_cdev_create_iso_context *request = buffer;
Kristian Høgsberg24315c52007-06-20 17:48:07 -0400820 struct fw_iso_context *context;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500821
Stefan Richterfae60312008-02-20 21:10:06 +0100822 /* We only support one context at this time. */
823 if (client->iso_context != NULL)
824 return -EBUSY;
825
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400826 if (request->channel > 63)
Kristian Høgsberg21efb3c2007-02-16 17:34:50 -0500827 return -EINVAL;
828
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400829 switch (request->type) {
Kristian Høgsbergc70dc782007-03-14 17:34:53 -0400830 case FW_ISO_CONTEXT_RECEIVE:
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400831 if (request->header_size < 4 || (request->header_size & 3))
Kristian Høgsbergc70dc782007-03-14 17:34:53 -0400832 return -EINVAL;
833
834 break;
835
836 case FW_ISO_CONTEXT_TRANSMIT:
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400837 if (request->speed > SCODE_3200)
Kristian Høgsbergc70dc782007-03-14 17:34:53 -0400838 return -EINVAL;
839
840 break;
841
842 default:
Kristian Høgsberg21efb3c2007-02-16 17:34:50 -0500843 return -EINVAL;
Kristian Høgsbergc70dc782007-03-14 17:34:53 -0400844 }
845
Kristian Høgsberg24315c52007-06-20 17:48:07 -0400846 context = fw_iso_context_create(client->device->card,
847 request->type,
848 request->channel,
849 request->speed,
850 request->header_size,
851 iso_callback, client);
852 if (IS_ERR(context))
853 return PTR_ERR(context);
854
Kristian Høgsbergabaa5742007-04-30 15:03:14 -0400855 client->iso_closure = request->closure;
Kristian Høgsberg24315c52007-06-20 17:48:07 -0400856 client->iso_context = context;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500857
Kristian Høgsbergabaa5742007-04-30 15:03:14 -0400858 /* We only support one context at this time. */
859 request->handle = 0;
860
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500861 return 0;
862}
863
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -0400864/* Macros for decoding the iso packet control header. */
865#define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff)
866#define GET_INTERRUPT(v) (((v) >> 16) & 0x01)
867#define GET_SKIP(v) (((v) >> 17) & 0x01)
Stefan Richter7a100342008-09-12 18:09:55 +0200868#define GET_TAG(v) (((v) >> 18) & 0x03)
869#define GET_SY(v) (((v) >> 20) & 0x0f)
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -0400870#define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff)
871
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400872static int ioctl_queue_iso(struct client *client, void *buffer)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500873{
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400874 struct fw_cdev_queue_iso *request = buffer;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500875 struct fw_cdev_iso_packet __user *p, *end, *next;
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500876 struct fw_iso_context *ctx = client->iso_context;
Kristian Høgsbergef370ee2007-03-28 20:46:23 +0200877 unsigned long payload, buffer_end, header_length;
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -0400878 u32 control;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500879 int count;
880 struct {
881 struct fw_iso_packet packet;
882 u8 header[256];
883 } u;
884
Kristian Høgsbergabaa5742007-04-30 15:03:14 -0400885 if (ctx == NULL || request->handle != 0)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500886 return -EINVAL;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500887
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400888 /*
889 * If the user passes a non-NULL data pointer, has mmap()'ed
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500890 * the iso buffer, and the pointer points inside the buffer,
891 * we setup the payload pointers accordingly. Otherwise we
Kristian Høgsberg9aad8122007-02-16 17:34:38 -0500892 * set them both to 0, which will still let packets with
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500893 * payload_length == 0 through. In other words, if no packets
894 * use the indirect payload, the iso buffer need not be mapped
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400895 * and the request->data pointer is ignored.
896 */
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500897
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400898 payload = (unsigned long)request->data - client->vm_start;
Kristian Høgsbergef370ee2007-03-28 20:46:23 +0200899 buffer_end = client->buffer.page_count << PAGE_SHIFT;
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400900 if (request->data == 0 || client->buffer.pages == NULL ||
Kristian Høgsbergef370ee2007-03-28 20:46:23 +0200901 payload >= buffer_end) {
Kristian Høgsberg9aad8122007-02-16 17:34:38 -0500902 payload = 0;
Kristian Høgsbergef370ee2007-03-28 20:46:23 +0200903 buffer_end = 0;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500904 }
905
Al Viro1ccc9142007-10-14 19:34:40 +0100906 p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(request->packets);
907
908 if (!access_ok(VERIFY_READ, p, request->size))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500909 return -EFAULT;
910
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400911 end = (void __user *)p + request->size;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500912 count = 0;
913 while (p < end) {
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -0400914 if (get_user(control, &p->control))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500915 return -EFAULT;
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -0400916 u.packet.payload_length = GET_PAYLOAD_LENGTH(control);
917 u.packet.interrupt = GET_INTERRUPT(control);
918 u.packet.skip = GET_SKIP(control);
919 u.packet.tag = GET_TAG(control);
920 u.packet.sy = GET_SY(control);
921 u.packet.header_length = GET_HEADER_LENGTH(control);
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500922
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500923 if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) {
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500924 header_length = u.packet.header_length;
925 } else {
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400926 /*
927 * We require that header_length is a multiple of
928 * the fixed header size, ctx->header_size.
929 */
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500930 if (ctx->header_size == 0) {
931 if (u.packet.header_length > 0)
932 return -EINVAL;
933 } else if (u.packet.header_length % ctx->header_size != 0) {
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500934 return -EINVAL;
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500935 }
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500936 header_length = 0;
937 }
938
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500939 next = (struct fw_cdev_iso_packet __user *)
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500940 &p->header[header_length / 4];
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500941 if (next > end)
942 return -EINVAL;
943 if (__copy_from_user
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500944 (u.packet.header, p->header, header_length))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500945 return -EFAULT;
Kristian Høgsberg98b6cbe2007-02-16 17:34:51 -0500946 if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT &&
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500947 u.packet.header_length + u.packet.payload_length > 0)
948 return -EINVAL;
Kristian Høgsbergef370ee2007-03-28 20:46:23 +0200949 if (payload + u.packet.payload_length > buffer_end)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500950 return -EINVAL;
951
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500952 if (fw_iso_context_queue(ctx, &u.packet,
953 &client->buffer, payload))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500954 break;
955
956 p = next;
957 payload += u.packet.payload_length;
958 count++;
959 }
960
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400961 request->size -= uptr_to_u64(p) - request->packets;
962 request->packets = uptr_to_u64(p);
963 request->data = client->vm_start + payload;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500964
965 return count;
966}
967
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400968static int ioctl_start_iso(struct client *client, void *buffer)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500969{
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400970 struct fw_cdev_start_iso *request = buffer;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500971
Stefan Richterfae60312008-02-20 21:10:06 +0100972 if (client->iso_context == NULL || request->handle != 0)
Kristian Høgsbergabaa5742007-04-30 15:03:14 -0400973 return -EINVAL;
Stefan Richterfae60312008-02-20 21:10:06 +0100974
Kristian Høgsbergeb0306e2007-03-14 17:34:54 -0400975 if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE) {
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400976 if (request->tags == 0 || request->tags > 15)
Kristian Høgsbergeb0306e2007-03-14 17:34:54 -0400977 return -EINVAL;
978
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400979 if (request->sync > 15)
Kristian Høgsbergeb0306e2007-03-14 17:34:54 -0400980 return -EINVAL;
981 }
982
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400983 return fw_iso_context_start(client->iso_context, request->cycle,
984 request->sync, request->tags);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500985}
986
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400987static int ioctl_stop_iso(struct client *client, void *buffer)
Kristian Høgsbergb8295662007-02-16 17:34:42 -0500988{
Kristian Høgsbergabaa5742007-04-30 15:03:14 -0400989 struct fw_cdev_stop_iso *request = buffer;
990
Stefan Richterfae60312008-02-20 21:10:06 +0100991 if (client->iso_context == NULL || request->handle != 0)
Kristian Høgsbergabaa5742007-04-30 15:03:14 -0400992 return -EINVAL;
993
Kristian Høgsbergb8295662007-02-16 17:34:42 -0500994 return fw_iso_context_stop(client->iso_context);
995}
996
Stefan Richtera64408b2007-09-29 10:41:58 +0200997static int ioctl_get_cycle_timer(struct client *client, void *buffer)
998{
999 struct fw_cdev_get_cycle_timer *request = buffer;
1000 struct fw_card *card = client->device->card;
1001 unsigned long long bus_time;
1002 struct timeval tv;
1003 unsigned long flags;
1004
1005 preempt_disable();
1006 local_irq_save(flags);
1007
1008 bus_time = card->driver->get_bus_time(card);
1009 do_gettimeofday(&tv);
1010
1011 local_irq_restore(flags);
1012 preempt_enable();
1013
1014 request->local_time = tv.tv_sec * 1000000ULL + tv.tv_usec;
1015 request->cycle_timer = bus_time & 0xffffffff;
1016 return 0;
1017}
1018
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001019static void iso_resource_work(struct work_struct *work)
1020{
1021 struct iso_resource_event *e;
1022 struct iso_resource *r =
1023 container_of(work, struct iso_resource, work.work);
1024 struct client *client = r->client;
1025 int generation, channel, bandwidth, todo;
1026 bool skip, free, success;
1027
1028 spin_lock_irq(&client->lock);
1029 generation = client->device->generation;
1030 todo = r->todo;
1031 /* Allow 1000ms grace period for other reallocations. */
1032 if (todo == ISO_RES_ALLOC &&
1033 time_is_after_jiffies(client->device->card->reset_jiffies + HZ)) {
1034 if (schedule_delayed_work(&r->work, DIV_ROUND_UP(HZ, 3)))
1035 client_get(client);
1036 skip = true;
1037 } else {
1038 /* We could be called twice within the same generation. */
1039 skip = todo == ISO_RES_REALLOC &&
1040 r->generation == generation;
1041 }
Stefan Richter1ec3c022009-01-04 16:23:29 +01001042 free = todo == ISO_RES_DEALLOC ||
1043 todo == ISO_RES_ALLOC_ONCE ||
1044 todo == ISO_RES_DEALLOC_ONCE;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001045 r->generation = generation;
1046 spin_unlock_irq(&client->lock);
1047
1048 if (skip)
1049 goto out;
1050
1051 bandwidth = r->bandwidth;
1052
1053 fw_iso_resource_manage(client->device->card, generation,
1054 r->channels, &channel, &bandwidth,
Stefan Richter1ec3c022009-01-04 16:23:29 +01001055 todo == ISO_RES_ALLOC ||
1056 todo == ISO_RES_REALLOC ||
1057 todo == ISO_RES_ALLOC_ONCE);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001058 /*
1059 * Is this generation outdated already? As long as this resource sticks
1060 * in the idr, it will be scheduled again for a newer generation or at
1061 * shutdown.
1062 */
1063 if (channel == -EAGAIN &&
1064 (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC))
1065 goto out;
1066
1067 success = channel >= 0 || bandwidth > 0;
1068
1069 spin_lock_irq(&client->lock);
1070 /*
1071 * Transit from allocation to reallocation, except if the client
1072 * requested deallocation in the meantime.
1073 */
1074 if (r->todo == ISO_RES_ALLOC)
1075 r->todo = ISO_RES_REALLOC;
1076 /*
1077 * Allocation or reallocation failure? Pull this resource out of the
1078 * idr and prepare for deletion, unless the client is shutting down.
1079 */
1080 if (r->todo == ISO_RES_REALLOC && !success &&
1081 !client->in_shutdown &&
1082 idr_find(&client->resource_idr, r->resource.handle)) {
1083 idr_remove(&client->resource_idr, r->resource.handle);
1084 client_put(client);
1085 free = true;
1086 }
1087 spin_unlock_irq(&client->lock);
1088
1089 if (todo == ISO_RES_ALLOC && channel >= 0)
Stefan Richter5d9cb7d272009-01-08 23:07:40 +01001090 r->channels = 1ULL << channel;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001091
1092 if (todo == ISO_RES_REALLOC && success)
1093 goto out;
1094
Stefan Richter1ec3c022009-01-04 16:23:29 +01001095 if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) {
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001096 e = r->e_alloc;
1097 r->e_alloc = NULL;
1098 } else {
1099 e = r->e_dealloc;
1100 r->e_dealloc = NULL;
1101 }
1102 e->resource.handle = r->resource.handle;
1103 e->resource.channel = channel;
1104 e->resource.bandwidth = bandwidth;
1105
1106 queue_event(client, &e->event,
1107 &e->resource, sizeof(e->resource), NULL, 0);
1108
1109 if (free) {
1110 cancel_delayed_work(&r->work);
1111 kfree(r->e_alloc);
1112 kfree(r->e_dealloc);
1113 kfree(r);
1114 }
1115 out:
1116 client_put(client);
1117}
1118
Stefan Richter81610b82009-01-11 13:44:46 +01001119static void schedule_iso_resource(struct iso_resource *r)
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001120{
Stefan Richter1ec3c022009-01-04 16:23:29 +01001121 client_get(r->client);
Stefan Richter81610b82009-01-11 13:44:46 +01001122 if (!schedule_delayed_work(&r->work, 0))
Stefan Richter1ec3c022009-01-04 16:23:29 +01001123 client_put(r->client);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001124}
1125
1126static void release_iso_resource(struct client *client,
1127 struct client_resource *resource)
1128{
1129 struct iso_resource *r =
1130 container_of(resource, struct iso_resource, resource);
1131
1132 spin_lock_irq(&client->lock);
1133 r->todo = ISO_RES_DEALLOC;
1134 schedule_iso_resource(r);
1135 spin_unlock_irq(&client->lock);
1136}
1137
Stefan Richter1ec3c022009-01-04 16:23:29 +01001138static int init_iso_resource(struct client *client,
1139 struct fw_cdev_allocate_iso_resource *request, int todo)
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001140{
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001141 struct iso_resource_event *e1, *e2;
1142 struct iso_resource *r;
1143 int ret;
1144
1145 if ((request->channels == 0 && request->bandwidth == 0) ||
1146 request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL ||
1147 request->bandwidth < 0)
1148 return -EINVAL;
1149
1150 r = kmalloc(sizeof(*r), GFP_KERNEL);
1151 e1 = kmalloc(sizeof(*e1), GFP_KERNEL);
1152 e2 = kmalloc(sizeof(*e2), GFP_KERNEL);
1153 if (r == NULL || e1 == NULL || e2 == NULL) {
1154 ret = -ENOMEM;
1155 goto fail;
1156 }
1157
1158 INIT_DELAYED_WORK(&r->work, iso_resource_work);
1159 r->client = client;
Stefan Richter1ec3c022009-01-04 16:23:29 +01001160 r->todo = todo;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001161 r->generation = -1;
1162 r->channels = request->channels;
1163 r->bandwidth = request->bandwidth;
1164 r->e_alloc = e1;
1165 r->e_dealloc = e2;
1166
1167 e1->resource.closure = request->closure;
1168 e1->resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED;
1169 e2->resource.closure = request->closure;
1170 e2->resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED;
1171
Stefan Richter1ec3c022009-01-04 16:23:29 +01001172 if (todo == ISO_RES_ALLOC) {
1173 r->resource.release = release_iso_resource;
1174 ret = add_client_resource(client, &r->resource, GFP_KERNEL);
Stefan Richter81610b82009-01-11 13:44:46 +01001175 if (ret < 0)
1176 goto fail;
Stefan Richter1ec3c022009-01-04 16:23:29 +01001177 } else {
1178 r->resource.release = NULL;
1179 r->resource.handle = -1;
Stefan Richter81610b82009-01-11 13:44:46 +01001180 schedule_iso_resource(r);
Stefan Richter1ec3c022009-01-04 16:23:29 +01001181 }
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001182 request->handle = r->resource.handle;
1183
1184 return 0;
1185 fail:
1186 kfree(r);
1187 kfree(e1);
1188 kfree(e2);
1189
1190 return ret;
1191}
1192
Stefan Richter1ec3c022009-01-04 16:23:29 +01001193static int ioctl_allocate_iso_resource(struct client *client, void *buffer)
1194{
1195 struct fw_cdev_allocate_iso_resource *request = buffer;
1196
1197 return init_iso_resource(client, request, ISO_RES_ALLOC);
1198}
1199
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001200static int ioctl_deallocate_iso_resource(struct client *client, void *buffer)
1201{
1202 struct fw_cdev_deallocate *request = buffer;
1203
1204 return release_client_resource(client, request->handle,
1205 release_iso_resource, NULL);
1206}
1207
Stefan Richter1ec3c022009-01-04 16:23:29 +01001208static int ioctl_allocate_iso_resource_once(struct client *client, void *buffer)
1209{
1210 struct fw_cdev_allocate_iso_resource *request = buffer;
1211
1212 return init_iso_resource(client, request, ISO_RES_ALLOC_ONCE);
1213}
1214
1215static int ioctl_deallocate_iso_resource_once(struct client *client, void *buffer)
1216{
1217 struct fw_cdev_allocate_iso_resource *request = buffer;
1218
1219 return init_iso_resource(client, request, ISO_RES_DEALLOC_ONCE);
1220}
1221
Stefan Richterc8a25902009-03-10 20:59:16 +01001222/*
1223 * Returns a speed code: Maximum speed to or from this device,
1224 * limited by the device's link speed, the local node's link speed,
1225 * and all PHY port speeds between the two links.
1226 */
Stefan Richter33580a32009-01-04 16:23:29 +01001227static int ioctl_get_speed(struct client *client, void *buffer)
1228{
Stefan Richterc8a25902009-03-10 20:59:16 +01001229 return client->device->max_speed;
Stefan Richter33580a32009-01-04 16:23:29 +01001230}
1231
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +01001232static int ioctl_send_broadcast_request(struct client *client, void *buffer)
1233{
1234 struct fw_cdev_send_request *request = buffer;
1235
1236 switch (request->tcode) {
1237 case TCODE_WRITE_QUADLET_REQUEST:
1238 case TCODE_WRITE_BLOCK_REQUEST:
1239 break;
1240 default:
1241 return -EINVAL;
1242 }
1243
Stefan Richter1566f3d2009-01-04 16:23:29 +01001244 /* Security policy: Only allow accesses to Units Space. */
1245 if (request->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END)
1246 return -EACCES;
1247
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +01001248 return init_request(client, request, LOCAL_BUS | 0x3f, SCODE_100);
1249}
1250
Jay Fenlasonf8c22872009-03-05 19:08:40 +01001251static int ioctl_send_stream_packet(struct client *client, void *buffer)
1252{
Stefan Richter18e9b102009-03-10 21:02:21 +01001253 struct fw_cdev_send_stream_packet *p = buffer;
1254 struct fw_cdev_send_request request;
1255 int dest;
Jay Fenlasonf8c22872009-03-05 19:08:40 +01001256
Stefan Richter18e9b102009-03-10 21:02:21 +01001257 if (p->speed > client->device->card->link_speed ||
1258 p->length > 1024 << p->speed)
1259 return -EIO;
Jay Fenlasonf8c22872009-03-05 19:08:40 +01001260
Stefan Richter18e9b102009-03-10 21:02:21 +01001261 if (p->tag > 3 || p->channel > 63 || p->sy > 15)
1262 return -EINVAL;
1263
1264 dest = fw_stream_packet_destination_id(p->tag, p->channel, p->sy);
1265 request.tcode = TCODE_STREAM_DATA;
1266 request.length = p->length;
1267 request.closure = p->closure;
1268 request.data = p->data;
1269 request.generation = p->generation;
1270
1271 return init_request(client, &request, dest, p->speed);
Jay Fenlasonf8c22872009-03-05 19:08:40 +01001272}
1273
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001274static int (* const ioctl_handlers[])(struct client *client, void *buffer) = {
1275 ioctl_get_info,
1276 ioctl_send_request,
1277 ioctl_allocate,
1278 ioctl_deallocate,
1279 ioctl_send_response,
1280 ioctl_initiate_bus_reset,
1281 ioctl_add_descriptor,
1282 ioctl_remove_descriptor,
1283 ioctl_create_iso_context,
1284 ioctl_queue_iso,
1285 ioctl_start_iso,
1286 ioctl_stop_iso,
Stefan Richtera64408b2007-09-29 10:41:58 +02001287 ioctl_get_cycle_timer,
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001288 ioctl_allocate_iso_resource,
1289 ioctl_deallocate_iso_resource,
Stefan Richter1ec3c022009-01-04 16:23:29 +01001290 ioctl_allocate_iso_resource_once,
1291 ioctl_deallocate_iso_resource_once,
Stefan Richter33580a32009-01-04 16:23:29 +01001292 ioctl_get_speed,
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +01001293 ioctl_send_broadcast_request,
Jay Fenlasonf8c22872009-03-05 19:08:40 +01001294 ioctl_send_stream_packet,
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001295};
1296
Stefan Richter53dca512008-12-14 21:47:04 +01001297static int dispatch_ioctl(struct client *client,
1298 unsigned int cmd, void __user *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001299{
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001300 char buffer[256];
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001301 int ret;
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001302
1303 if (_IOC_TYPE(cmd) != '#' ||
1304 _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001305 return -EINVAL;
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001306
1307 if (_IOC_DIR(cmd) & _IOC_WRITE) {
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04001308 if (_IOC_SIZE(cmd) > sizeof(buffer) ||
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001309 copy_from_user(buffer, arg, _IOC_SIZE(cmd)))
1310 return -EFAULT;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001311 }
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001312
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001313 ret = ioctl_handlers[_IOC_NR(cmd)](client, buffer);
1314 if (ret < 0)
1315 return ret;
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001316
1317 if (_IOC_DIR(cmd) & _IOC_READ) {
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04001318 if (_IOC_SIZE(cmd) > sizeof(buffer) ||
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001319 copy_to_user(arg, buffer, _IOC_SIZE(cmd)))
1320 return -EFAULT;
1321 }
1322
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001323 return ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001324}
1325
Stefan Richter53dca512008-12-14 21:47:04 +01001326static long fw_device_op_ioctl(struct file *file,
1327 unsigned int cmd, unsigned long arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001328{
1329 struct client *client = file->private_data;
1330
Jay Fenlason551f4cb2008-05-16 11:15:23 -04001331 if (fw_device_is_shutdown(client->device))
1332 return -ENODEV;
1333
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001334 return dispatch_ioctl(client, cmd, (void __user *) arg);
1335}
1336
1337#ifdef CONFIG_COMPAT
Stefan Richter53dca512008-12-14 21:47:04 +01001338static long fw_device_op_compat_ioctl(struct file *file,
1339 unsigned int cmd, unsigned long arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001340{
1341 struct client *client = file->private_data;
1342
Jay Fenlason551f4cb2008-05-16 11:15:23 -04001343 if (fw_device_is_shutdown(client->device))
1344 return -ENODEV;
1345
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001346 return dispatch_ioctl(client, cmd, compat_ptr(arg));
1347}
1348#endif
1349
1350static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma)
1351{
1352 struct client *client = file->private_data;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001353 enum dma_data_direction direction;
1354 unsigned long size;
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001355 int page_count, ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001356
Jay Fenlason551f4cb2008-05-16 11:15:23 -04001357 if (fw_device_is_shutdown(client->device))
1358 return -ENODEV;
1359
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001360 /* FIXME: We could support multiple buffers, but we don't. */
1361 if (client->buffer.pages != NULL)
1362 return -EBUSY;
1363
1364 if (!(vma->vm_flags & VM_SHARED))
1365 return -EINVAL;
1366
1367 if (vma->vm_start & ~PAGE_MASK)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001368 return -EINVAL;
1369
1370 client->vm_start = vma->vm_start;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001371 size = vma->vm_end - vma->vm_start;
1372 page_count = size >> PAGE_SHIFT;
1373 if (size & ~PAGE_MASK)
1374 return -EINVAL;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001375
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001376 if (vma->vm_flags & VM_WRITE)
1377 direction = DMA_TO_DEVICE;
1378 else
1379 direction = DMA_FROM_DEVICE;
1380
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001381 ret = fw_iso_buffer_init(&client->buffer, client->device->card,
1382 page_count, direction);
1383 if (ret < 0)
1384 return ret;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001385
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001386 ret = fw_iso_buffer_map(&client->buffer, vma);
1387 if (ret < 0)
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001388 fw_iso_buffer_destroy(&client->buffer, client->device->card);
1389
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001390 return ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001391}
1392
Jay Fenlason45ee3192008-12-21 16:47:17 +01001393static int shutdown_resource(int id, void *p, void *data)
1394{
1395 struct client_resource *r = p;
1396 struct client *client = data;
1397
1398 r->release(client, r);
Stefan Richterfb443032009-01-04 16:23:29 +01001399 client_put(client);
Jay Fenlason45ee3192008-12-21 16:47:17 +01001400
1401 return 0;
1402}
1403
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001404static int fw_device_op_release(struct inode *inode, struct file *file)
1405{
1406 struct client *client = file->private_data;
Kristian Høgsberg2603bf22007-03-07 12:12:48 -05001407 struct event *e, *next_e;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001408
Stefan Richter97811e32008-12-14 19:19:23 +01001409 mutex_lock(&client->device->client_list_mutex);
1410 list_del(&client->link);
1411 mutex_unlock(&client->device->client_list_mutex);
1412
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001413 if (client->iso_context)
1414 fw_iso_context_destroy(client->iso_context);
1415
Stefan Richter36a755c2009-01-05 20:28:10 +01001416 if (client->buffer.pages)
1417 fw_iso_buffer_destroy(&client->buffer, client->device->card);
1418
Jay Fenlason45ee3192008-12-21 16:47:17 +01001419 /* Freeze client->resource_idr and client->event_list */
Stefan Richter3ba94982009-01-04 16:23:29 +01001420 spin_lock_irq(&client->lock);
Jay Fenlason45ee3192008-12-21 16:47:17 +01001421 client->in_shutdown = true;
Stefan Richter3ba94982009-01-04 16:23:29 +01001422 spin_unlock_irq(&client->lock);
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +02001423
Jay Fenlason45ee3192008-12-21 16:47:17 +01001424 idr_for_each(&client->resource_idr, shutdown_resource, client);
1425 idr_remove_all(&client->resource_idr);
1426 idr_destroy(&client->resource_idr);
Kristian Høgsberg28cf6a02007-03-07 12:12:50 -05001427
Kristian Høgsberg2603bf22007-03-07 12:12:48 -05001428 list_for_each_entry_safe(e, next_e, &client->event_list, link)
1429 kfree(e);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001430
Stefan Richterfb443032009-01-04 16:23:29 +01001431 client_put(client);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001432
1433 return 0;
1434}
1435
1436static unsigned int fw_device_op_poll(struct file *file, poll_table * pt)
1437{
1438 struct client *client = file->private_data;
Kristian Høgsberg2603bf22007-03-07 12:12:48 -05001439 unsigned int mask = 0;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001440
1441 poll_wait(file, &client->wait, pt);
1442
Kristian Høgsberg2603bf22007-03-07 12:12:48 -05001443 if (fw_device_is_shutdown(client->device))
1444 mask |= POLLHUP | POLLERR;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001445 if (!list_empty(&client->event_list))
Kristian Høgsberg2603bf22007-03-07 12:12:48 -05001446 mask |= POLLIN | POLLRDNORM;
1447
1448 return mask;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001449}
1450
Stefan Richter21ebcd12007-01-14 15:29:07 +01001451const struct file_operations fw_device_ops = {
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001452 .owner = THIS_MODULE,
1453 .open = fw_device_op_open,
1454 .read = fw_device_op_read,
1455 .unlocked_ioctl = fw_device_op_ioctl,
1456 .poll = fw_device_op_poll,
1457 .release = fw_device_op_release,
1458 .mmap = fw_device_op_mmap,
1459
1460#ifdef CONFIG_COMPAT
Stefan Richter5af4e5e2007-01-21 20:45:32 +01001461 .compat_ioctl = fw_device_op_compat_ioctl,
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001462#endif
1463};