blob: 4799393247c8ada8a626722e0bea57c0ae99409e [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 Richtereb5b35a2010-07-07 14:13:14 +020021#include <linux/bug.h>
Stefan Richterbe5bbd62009-01-04 16:23:29 +010022#include <linux/compat.h>
23#include <linux/delay.h>
24#include <linux/device.h>
25#include <linux/errno.h>
Stefan Richter77c9a5d2009-06-05 16:26:18 +020026#include <linux/firewire.h>
Stefan Richterbe5bbd62009-01-04 16:23:29 +010027#include <linux/firewire-cdev.h>
28#include <linux/idr.h>
Stefan Richter4a9bde92010-02-20 22:24:43 +010029#include <linux/irqflags.h>
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +010030#include <linux/jiffies.h>
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050031#include <linux/kernel.h>
Stefan Richterfb443032009-01-04 16:23:29 +010032#include <linux/kref.h>
Stefan Richterbe5bbd62009-01-04 16:23:29 +010033#include <linux/mm.h>
34#include <linux/module.h>
Stefan Richterd67cfb92008-10-05 10:37:11 +020035#include <linux/mutex.h>
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050036#include <linux/poll.h>
Stefan Richterae2a97662010-07-29 09:31:56 +020037#include <linux/sched.h> /* required for linux/wait.h */
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090038#include <linux/slab.h>
Jay Fenlasoncf417e542008-10-03 11:19:09 -040039#include <linux/spinlock.h>
Stefan Richter281e2032010-01-24 16:45:03 +010040#include <linux/string.h>
Stefan Richterbe5bbd62009-01-04 16:23:29 +010041#include <linux/time.h>
Stefan Richtere034d242009-06-06 18:36:24 +020042#include <linux/uaccess.h>
Stefan Richterbe5bbd62009-01-04 16:23:29 +010043#include <linux/vmalloc.h>
44#include <linux/wait.h>
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +010045#include <linux/workqueue.h>
Stefan Richterbe5bbd62009-01-04 16:23:29 +010046
Stefan Richtera64408b2007-09-29 10:41:58 +020047#include <asm/system.h>
Stefan Richterbe5bbd62009-01-04 16:23:29 +010048
Stefan Richter77c9a5d2009-06-05 16:26:18 +020049#include "core.h"
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050050
Stefan Richter604f4512010-06-20 22:52:55 +020051/*
52 * ABI version history is documented in linux/firewire-cdev.h.
53 */
Stefan Richter8e2b2b42010-07-23 13:05:39 +020054#define FW_CDEV_KERNEL_VERSION 4
55#define FW_CDEV_VERSION_EVENT_REQUEST2 4
56#define FW_CDEV_VERSION_ALLOCATE_REGION_END 4
Stefan Richter604f4512010-06-20 22:52:55 +020057
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050058struct client {
Kristian Høgsberg344bbc42007-03-07 12:12:43 -050059 u32 version;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050060 struct fw_device *device;
Jay Fenlason45ee3192008-12-21 16:47:17 +010061
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050062 spinlock_t lock;
Jay Fenlason45ee3192008-12-21 16:47:17 +010063 bool in_shutdown;
64 struct idr resource_idr;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050065 struct list_head event_list;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050066 wait_queue_head_t wait;
Clemens Ladisch5a5e62d2011-01-10 17:28:39 +010067 wait_queue_head_t tx_flush_wait;
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -040068 u64 bus_reset_closure;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -050069
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050070 struct fw_iso_context *iso_context;
Kristian Høgsbergabaa5742007-04-30 15:03:14 -040071 u64 iso_closure;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -050072 struct fw_iso_buffer buffer;
73 unsigned long vm_start;
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -050074
Stefan Richterbf54e142010-07-16 22:25:51 +020075 struct list_head phy_receiver_link;
76 u64 phy_receiver_closure;
77
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -050078 struct list_head link;
Stefan Richterfb443032009-01-04 16:23:29 +010079 struct kref kref;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050080};
81
Stefan Richterfb443032009-01-04 16:23:29 +010082static inline void client_get(struct client *client)
83{
84 kref_get(&client->kref);
85}
86
87static void client_release(struct kref *kref)
88{
89 struct client *client = container_of(kref, struct client, kref);
90
91 fw_device_put(client->device);
92 kfree(client);
93}
94
95static void client_put(struct client *client)
96{
97 kref_put(&client->kref, client_release);
98}
99
Stefan Richter97c18b72009-01-04 16:23:29 +0100100struct client_resource;
101typedef void (*client_resource_release_fn_t)(struct client *,
102 struct client_resource *);
103struct client_resource {
104 client_resource_release_fn_t release;
105 int handle;
106};
107
108struct address_handler_resource {
109 struct client_resource resource;
110 struct fw_address_handler handler;
111 __u64 closure;
112 struct client *client;
113};
114
115struct outbound_transaction_resource {
116 struct client_resource resource;
117 struct fw_transaction transaction;
118};
119
120struct inbound_transaction_resource {
121 struct client_resource resource;
Jay Fenlason08bd34c2010-05-18 14:02:45 -0400122 struct fw_card *card;
Stefan Richter97c18b72009-01-04 16:23:29 +0100123 struct fw_request *request;
124 void *data;
125 size_t length;
126};
127
128struct descriptor_resource {
129 struct client_resource resource;
130 struct fw_descriptor descriptor;
131 u32 data[0];
132};
133
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100134struct iso_resource {
135 struct client_resource resource;
136 struct client *client;
137 /* Schedule work and access todo only with client->lock held. */
138 struct delayed_work work;
Stefan Richter1ec3c022009-01-04 16:23:29 +0100139 enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC,
140 ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100141 int generation;
142 u64 channels;
143 s32 bandwidth;
144 struct iso_resource_event *e_alloc, *e_dealloc;
145};
146
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100147static void release_iso_resource(struct client *, struct client_resource *);
148
Stefan Richter9fb551b2009-10-08 00:41:10 +0200149static void schedule_iso_resource(struct iso_resource *r, unsigned long delay)
150{
151 client_get(r->client);
Stefan Richter105e53f2011-05-01 20:50:31 +0200152 if (!queue_delayed_work(fw_workqueue, &r->work, delay))
Stefan Richter9fb551b2009-10-08 00:41:10 +0200153 client_put(r->client);
154}
155
156static void schedule_if_iso_resource(struct client_resource *resource)
157{
158 if (resource->release == release_iso_resource)
159 schedule_iso_resource(container_of(resource,
160 struct iso_resource, resource), 0);
161}
162
Stefan Richter97c18b72009-01-04 16:23:29 +0100163/*
164 * dequeue_event() just kfree()'s the event, so the event has to be
165 * the first field in a struct XYZ_event.
166 */
167struct event {
168 struct { void *data; size_t size; } v[2];
169 struct list_head link;
170};
171
172struct bus_reset_event {
173 struct event event;
174 struct fw_cdev_event_bus_reset reset;
175};
176
177struct outbound_transaction_event {
178 struct event event;
179 struct client *client;
180 struct outbound_transaction_resource r;
181 struct fw_cdev_event_response response;
182};
183
184struct inbound_transaction_event {
185 struct event event;
Stefan Richtere2055972010-06-20 22:53:55 +0200186 union {
187 struct fw_cdev_event_request request;
188 struct fw_cdev_event_request2 request2;
189 } req;
Stefan Richter97c18b72009-01-04 16:23:29 +0100190};
191
192struct iso_interrupt_event {
193 struct event event;
194 struct fw_cdev_event_iso_interrupt interrupt;
195};
196
Stefan Richter872e3302010-07-29 18:19:22 +0200197struct iso_interrupt_mc_event {
198 struct event event;
199 struct fw_cdev_event_iso_interrupt_mc interrupt;
200};
201
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100202struct iso_resource_event {
203 struct event event;
Stefan Richtere21fcf72009-10-08 00:41:38 +0200204 struct fw_cdev_event_iso_resource iso_resource;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100205};
206
Stefan Richter850bb6f2010-07-16 22:25:14 +0200207struct outbound_phy_packet_event {
208 struct event event;
209 struct client *client;
210 struct fw_packet p;
211 struct fw_cdev_event_phy_packet phy_packet;
212};
213
Stefan Richterbf54e142010-07-16 22:25:51 +0200214struct inbound_phy_packet_event {
215 struct event event;
216 struct fw_cdev_event_phy_packet phy_packet;
217};
218
Stefan Richter9c1176b2011-08-11 00:06:04 +0200219#ifdef CONFIG_COMPAT
220static void __user *u64_to_uptr(u64 value)
221{
222 if (is_compat_task())
223 return compat_ptr(value);
224 else
225 return (void __user *)(unsigned long)value;
226}
227
228static u64 uptr_to_u64(void __user *ptr)
229{
230 if (is_compat_task())
231 return ptr_to_compat(ptr);
232 else
233 return (u64)(unsigned long)ptr;
234}
235#else
236static inline void __user *u64_to_uptr(u64 value)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500237{
238 return (void __user *)(unsigned long)value;
239}
240
Stefan Richter9c1176b2011-08-11 00:06:04 +0200241static inline u64 uptr_to_u64(void __user *ptr)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500242{
Stefan Richter9c1176b2011-08-11 00:06:04 +0200243 return (u64)(unsigned long)ptr;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500244}
Stefan Richter9c1176b2011-08-11 00:06:04 +0200245#endif /* CONFIG_COMPAT */
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500246
247static int fw_device_op_open(struct inode *inode, struct file *file)
248{
249 struct fw_device *device;
250 struct client *client;
251
Stefan Richter96b19062008-02-02 15:01:09 +0100252 device = fw_device_get_by_devt(inode->i_rdev);
Kristian Høgsberga3aca3d2007-03-07 12:12:44 -0500253 if (device == NULL)
254 return -ENODEV;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500255
Jay Fenlason551f4cb2008-05-16 11:15:23 -0400256 if (fw_device_is_shutdown(device)) {
257 fw_device_put(device);
258 return -ENODEV;
259 }
260
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400261 client = kzalloc(sizeof(*client), GFP_KERNEL);
Stefan Richter96b19062008-02-02 15:01:09 +0100262 if (client == NULL) {
263 fw_device_put(device);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500264 return -ENOMEM;
Stefan Richter96b19062008-02-02 15:01:09 +0100265 }
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500266
Stefan Richter96b19062008-02-02 15:01:09 +0100267 client->device = device;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500268 spin_lock_init(&client->lock);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100269 idr_init(&client->resource_idr);
270 INIT_LIST_HEAD(&client->event_list);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500271 init_waitqueue_head(&client->wait);
Clemens Ladisch5a5e62d2011-01-10 17:28:39 +0100272 init_waitqueue_head(&client->tx_flush_wait);
Stefan Richterbf54e142010-07-16 22:25:51 +0200273 INIT_LIST_HEAD(&client->phy_receiver_link);
Stefan Richter93b37902011-07-09 16:43:22 +0200274 INIT_LIST_HEAD(&client->link);
Stefan Richterfb443032009-01-04 16:23:29 +0100275 kref_init(&client->kref);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500276
277 file->private_data = client;
278
Stefan Richter3ac26b22010-04-10 16:38:05 +0100279 return nonseekable_open(inode, file);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500280}
281
282static void queue_event(struct client *client, struct event *event,
283 void *data0, size_t size0, void *data1, size_t size1)
284{
285 unsigned long flags;
286
287 event->v[0].data = data0;
288 event->v[0].size = size0;
289 event->v[1].data = data1;
290 event->v[1].size = size1;
291
292 spin_lock_irqsave(&client->lock, flags);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100293 if (client->in_shutdown)
294 kfree(event);
295 else
296 list_add_tail(&event->link, &client->event_list);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500297 spin_unlock_irqrestore(&client->lock, flags);
Jay Fenlason83431cb2007-10-08 17:00:29 -0400298
299 wake_up_interruptible(&client->wait);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500300}
301
Stefan Richter53dca512008-12-14 21:47:04 +0100302static int dequeue_event(struct client *client,
303 char __user *buffer, size_t count)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500304{
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500305 struct event *event;
306 size_t size, total;
Stefan Richter2dbd7d72008-12-14 21:45:45 +0100307 int i, ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500308
Stefan Richter2dbd7d72008-12-14 21:45:45 +0100309 ret = wait_event_interruptible(client->wait,
310 !list_empty(&client->event_list) ||
311 fw_device_is_shutdown(client->device));
312 if (ret < 0)
313 return ret;
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500314
315 if (list_empty(&client->event_list) &&
316 fw_device_is_shutdown(client->device))
317 return -ENODEV;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500318
Stefan Richter3ba94982009-01-04 16:23:29 +0100319 spin_lock_irq(&client->lock);
Stefan Richtera459b8a2008-12-21 16:49:57 +0100320 event = list_first_entry(&client->event_list, struct event, link);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500321 list_del(&event->link);
Stefan Richter3ba94982009-01-04 16:23:29 +0100322 spin_unlock_irq(&client->lock);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500323
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500324 total = 0;
325 for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) {
326 size = min(event->v[i].size, count - total);
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500327 if (copy_to_user(buffer + total, event->v[i].data, size)) {
Stefan Richter2dbd7d72008-12-14 21:45:45 +0100328 ret = -EFAULT;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500329 goto out;
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500330 }
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500331 total += size;
332 }
Stefan Richter2dbd7d72008-12-14 21:45:45 +0100333 ret = total;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500334
335 out:
336 kfree(event);
337
Stefan Richter2dbd7d72008-12-14 21:45:45 +0100338 return ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500339}
340
Stefan Richter53dca512008-12-14 21:47:04 +0100341static ssize_t fw_device_op_read(struct file *file, char __user *buffer,
342 size_t count, loff_t *offset)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500343{
344 struct client *client = file->private_data;
345
346 return dequeue_event(client, buffer, count);
347}
348
Stefan Richter53dca512008-12-14 21:47:04 +0100349static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event,
350 struct client *client)
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500351{
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -0400352 struct fw_card *card = client->device->card;
Jay Fenlasoncf417e542008-10-03 11:19:09 -0400353
Stefan Richter3ba94982009-01-04 16:23:29 +0100354 spin_lock_irq(&card->lock);
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500355
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -0400356 event->closure = client->bus_reset_closure;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500357 event->type = FW_CDEV_EVENT_BUS_RESET;
Stefan Richtercf5a56a2008-01-24 01:53:51 +0100358 event->generation = client->device->generation;
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -0400359 event->node_id = client->device->node_id;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500360 event->local_node_id = card->local_node->node_id;
Stefan Richter250b2b62010-06-21 23:24:35 +0200361 event->bm_node_id = card->bm_node_id;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500362 event->irm_node_id = card->irm_node->node_id;
363 event->root_node_id = card->root_node->node_id;
Jay Fenlasoncf417e542008-10-03 11:19:09 -0400364
Stefan Richter3ba94982009-01-04 16:23:29 +0100365 spin_unlock_irq(&card->lock);
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500366}
367
Stefan Richter53dca512008-12-14 21:47:04 +0100368static void for_each_client(struct fw_device *device,
369 void (*callback)(struct client *client))
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500370{
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500371 struct client *c;
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500372
Stefan Richterd67cfb92008-10-05 10:37:11 +0200373 mutex_lock(&device->client_list_mutex);
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500374 list_for_each_entry(c, &device->client_list, link)
375 callback(c);
Stefan Richterd67cfb92008-10-05 10:37:11 +0200376 mutex_unlock(&device->client_list_mutex);
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500377}
378
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100379static int schedule_reallocations(int id, void *p, void *data)
380{
Stefan Richter9fb551b2009-10-08 00:41:10 +0200381 schedule_if_iso_resource(p);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100382
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100383 return 0;
384}
385
Stefan Richter53dca512008-12-14 21:47:04 +0100386static void queue_bus_reset_event(struct client *client)
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500387{
Stefan Richter97c18b72009-01-04 16:23:29 +0100388 struct bus_reset_event *e;
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500389
Stefan Richter97c18b72009-01-04 16:23:29 +0100390 e = kzalloc(sizeof(*e), GFP_KERNEL);
391 if (e == NULL) {
Stefan Richterbf54e142010-07-16 22:25:51 +0200392 fw_notify("Out of memory when allocating event\n");
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500393 return;
394 }
395
Stefan Richter97c18b72009-01-04 16:23:29 +0100396 fill_bus_reset_event(&e->reset, client);
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500397
Stefan Richter97c18b72009-01-04 16:23:29 +0100398 queue_event(client, &e->event,
399 &e->reset, sizeof(e->reset), NULL, 0);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100400
401 spin_lock_irq(&client->lock);
402 idr_for_each(&client->resource_idr, schedule_reallocations, client);
403 spin_unlock_irq(&client->lock);
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500404}
405
406void fw_device_cdev_update(struct fw_device *device)
407{
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500408 for_each_client(device, queue_bus_reset_event);
409}
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500410
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500411static void wake_up_client(struct client *client)
412{
413 wake_up_interruptible(&client->wait);
414}
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500415
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500416void fw_device_cdev_remove(struct fw_device *device)
417{
418 for_each_client(device, wake_up_client);
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500419}
420
Stefan Richter6e95dea2010-02-21 17:56:21 +0100421union ioctl_arg {
422 struct fw_cdev_get_info get_info;
423 struct fw_cdev_send_request send_request;
424 struct fw_cdev_allocate allocate;
425 struct fw_cdev_deallocate deallocate;
426 struct fw_cdev_send_response send_response;
427 struct fw_cdev_initiate_bus_reset initiate_bus_reset;
428 struct fw_cdev_add_descriptor add_descriptor;
429 struct fw_cdev_remove_descriptor remove_descriptor;
430 struct fw_cdev_create_iso_context create_iso_context;
431 struct fw_cdev_queue_iso queue_iso;
432 struct fw_cdev_start_iso start_iso;
433 struct fw_cdev_stop_iso stop_iso;
434 struct fw_cdev_get_cycle_timer get_cycle_timer;
435 struct fw_cdev_allocate_iso_resource allocate_iso_resource;
436 struct fw_cdev_send_stream_packet send_stream_packet;
437 struct fw_cdev_get_cycle_timer2 get_cycle_timer2;
Stefan Richter850bb6f2010-07-16 22:25:14 +0200438 struct fw_cdev_send_phy_packet send_phy_packet;
Stefan Richterbf54e142010-07-16 22:25:51 +0200439 struct fw_cdev_receive_phy_packets receive_phy_packets;
Stefan Richter872e3302010-07-29 18:19:22 +0200440 struct fw_cdev_set_iso_channels set_iso_channels;
Stefan Richter6e95dea2010-02-21 17:56:21 +0100441};
442
443static int ioctl_get_info(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500444{
Stefan Richter6e95dea2010-02-21 17:56:21 +0100445 struct fw_cdev_get_info *a = &arg->get_info;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500446 struct fw_cdev_event_bus_reset bus_reset;
Stefan Richterc9755e12008-03-24 20:54:28 +0100447 unsigned long ret = 0;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500448
Stefan Richter6e95dea2010-02-21 17:56:21 +0100449 client->version = a->version;
Stefan Richter604f4512010-06-20 22:52:55 +0200450 a->version = FW_CDEV_KERNEL_VERSION;
Stefan Richter6e95dea2010-02-21 17:56:21 +0100451 a->card = client->device->card->index;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500452
Stefan Richterc9755e12008-03-24 20:54:28 +0100453 down_read(&fw_device_rwsem);
454
Stefan Richter6e95dea2010-02-21 17:56:21 +0100455 if (a->rom != 0) {
456 size_t want = a->rom_length;
Stefan Richterd84702a2007-03-20 19:42:15 +0100457 size_t have = client->device->config_rom_length * 4;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500458
Stefan Richter6e95dea2010-02-21 17:56:21 +0100459 ret = copy_to_user(u64_to_uptr(a->rom),
460 client->device->config_rom, min(want, have));
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500461 }
Stefan Richter6e95dea2010-02-21 17:56:21 +0100462 a->rom_length = client->device->config_rom_length * 4;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500463
Stefan Richterc9755e12008-03-24 20:54:28 +0100464 up_read(&fw_device_rwsem);
465
466 if (ret != 0)
467 return -EFAULT;
468
Stefan Richter93b37902011-07-09 16:43:22 +0200469 mutex_lock(&client->device->client_list_mutex);
470
Stefan Richter6e95dea2010-02-21 17:56:21 +0100471 client->bus_reset_closure = a->bus_reset_closure;
472 if (a->bus_reset != 0) {
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -0400473 fill_bus_reset_event(&bus_reset, client);
Stefan Richter93b37902011-07-09 16:43:22 +0200474 ret = copy_to_user(u64_to_uptr(a->bus_reset),
475 &bus_reset, sizeof(bus_reset));
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500476 }
Stefan Richter93b37902011-07-09 16:43:22 +0200477 if (ret == 0 && list_empty(&client->link))
478 list_add_tail(&client->link, &client->device->client_list);
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500479
Stefan Richter93b37902011-07-09 16:43:22 +0200480 mutex_unlock(&client->device->client_list_mutex);
481
482 return ret ? -EFAULT : 0;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500483}
484
Stefan Richter53dca512008-12-14 21:47:04 +0100485static int add_client_resource(struct client *client,
486 struct client_resource *resource, gfp_t gfp_mask)
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400487{
488 unsigned long flags;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100489 int ret;
490
491 retry:
492 if (idr_pre_get(&client->resource_idr, gfp_mask) == 0)
493 return -ENOMEM;
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400494
495 spin_lock_irqsave(&client->lock, flags);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100496 if (client->in_shutdown)
497 ret = -ECANCELED;
498 else
499 ret = idr_get_new(&client->resource_idr, resource,
500 &resource->handle);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100501 if (ret >= 0) {
Stefan Richterfb443032009-01-04 16:23:29 +0100502 client_get(client);
Stefan Richter9fb551b2009-10-08 00:41:10 +0200503 schedule_if_iso_resource(resource);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100504 }
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400505 spin_unlock_irqrestore(&client->lock, flags);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100506
507 if (ret == -EAGAIN)
508 goto retry;
509
510 return ret < 0 ? ret : 0;
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400511}
512
Stefan Richter53dca512008-12-14 21:47:04 +0100513static int release_client_resource(struct client *client, u32 handle,
514 client_resource_release_fn_t release,
Stefan Richtere21fcf72009-10-08 00:41:38 +0200515 struct client_resource **return_resource)
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400516{
Stefan Richtere21fcf72009-10-08 00:41:38 +0200517 struct client_resource *resource;
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400518
Stefan Richter3ba94982009-01-04 16:23:29 +0100519 spin_lock_irq(&client->lock);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100520 if (client->in_shutdown)
Stefan Richtere21fcf72009-10-08 00:41:38 +0200521 resource = NULL;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100522 else
Stefan Richtere21fcf72009-10-08 00:41:38 +0200523 resource = idr_find(&client->resource_idr, handle);
524 if (resource && resource->release == release)
Jay Fenlason45ee3192008-12-21 16:47:17 +0100525 idr_remove(&client->resource_idr, handle);
Stefan Richter3ba94982009-01-04 16:23:29 +0100526 spin_unlock_irq(&client->lock);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400527
Stefan Richtere21fcf72009-10-08 00:41:38 +0200528 if (!(resource && resource->release == release))
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400529 return -EINVAL;
530
Stefan Richtere21fcf72009-10-08 00:41:38 +0200531 if (return_resource)
532 *return_resource = resource;
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400533 else
Stefan Richtere21fcf72009-10-08 00:41:38 +0200534 resource->release(client, resource);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400535
Stefan Richterfb443032009-01-04 16:23:29 +0100536 client_put(client);
537
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400538 return 0;
539}
540
Stefan Richter53dca512008-12-14 21:47:04 +0100541static void release_transaction(struct client *client,
542 struct client_resource *resource)
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400543{
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400544}
545
Stefan Richter53dca512008-12-14 21:47:04 +0100546static void complete_transaction(struct fw_card *card, int rcode,
547 void *payload, size_t length, void *data)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500548{
Stefan Richter97c18b72009-01-04 16:23:29 +0100549 struct outbound_transaction_event *e = data;
550 struct fw_cdev_event_response *rsp = &e->response;
551 struct client *client = e->client;
Kristian Høgsberg28cf6a02007-03-07 12:12:50 -0500552 unsigned long flags;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500553
Stefan Richter97c18b72009-01-04 16:23:29 +0100554 if (length < rsp->length)
555 rsp->length = length;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500556 if (rcode == RCODE_COMPLETE)
Stefan Richter97c18b72009-01-04 16:23:29 +0100557 memcpy(rsp->data, payload, rsp->length);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500558
Kristian Høgsberg28cf6a02007-03-07 12:12:50 -0500559 spin_lock_irqsave(&client->lock, flags);
Clemens Ladisch5a5e62d2011-01-10 17:28:39 +0100560 idr_remove(&client->resource_idr, e->r.resource.handle);
561 if (client->in_shutdown)
562 wake_up(&client->tx_flush_wait);
Kristian Høgsberg28cf6a02007-03-07 12:12:50 -0500563 spin_unlock_irqrestore(&client->lock, flags);
564
Stefan Richter97c18b72009-01-04 16:23:29 +0100565 rsp->type = FW_CDEV_EVENT_RESPONSE;
566 rsp->rcode = rcode;
David Moore8401d922008-07-29 23:46:25 -0700567
568 /*
Stefan Richter97c18b72009-01-04 16:23:29 +0100569 * In the case that sizeof(*rsp) doesn't align with the position of the
David Moore8401d922008-07-29 23:46:25 -0700570 * data, and the read is short, preserve an extra copy of the data
571 * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless
572 * for short reads and some apps depended on it, this is both safe
573 * and prudent for compatibility.
574 */
Stefan Richter97c18b72009-01-04 16:23:29 +0100575 if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data))
576 queue_event(client, &e->event, rsp, sizeof(*rsp),
577 rsp->data, rsp->length);
David Moore8401d922008-07-29 23:46:25 -0700578 else
Stefan Richter97c18b72009-01-04 16:23:29 +0100579 queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length,
David Moore8401d922008-07-29 23:46:25 -0700580 NULL, 0);
Stefan Richterfb443032009-01-04 16:23:29 +0100581
Clemens Ladisch5a5e62d2011-01-10 17:28:39 +0100582 /* Drop the idr's reference */
583 client_put(client);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500584}
585
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +0100586static int init_request(struct client *client,
587 struct fw_cdev_send_request *request,
588 int destination_id, int speed)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500589{
Stefan Richter97c18b72009-01-04 16:23:29 +0100590 struct outbound_transaction_event *e;
Stefan Richter1f3125a2008-12-05 22:44:42 +0100591 int ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500592
Stefan Richter18e9b102009-03-10 21:02:21 +0100593 if (request->tcode != TCODE_STREAM_DATA &&
594 (request->length > 4096 || request->length > 512 << speed))
Stefan Richter5d3fd692009-01-04 16:23:29 +0100595 return -EIO;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500596
Clemens Ladischa8e93f32010-07-07 14:37:30 +0200597 if (request->tcode == TCODE_WRITE_QUADLET_REQUEST &&
598 request->length < 4)
599 return -EINVAL;
600
Stefan Richter97c18b72009-01-04 16:23:29 +0100601 e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL);
602 if (e == NULL)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500603 return -ENOMEM;
604
Stefan Richter97c18b72009-01-04 16:23:29 +0100605 e->client = client;
606 e->response.length = request->length;
607 e->response.closure = request->closure;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500608
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400609 if (request->data &&
Stefan Richter97c18b72009-01-04 16:23:29 +0100610 copy_from_user(e->response.data,
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400611 u64_to_uptr(request->data), request->length)) {
Stefan Richter1f3125a2008-12-05 22:44:42 +0100612 ret = -EFAULT;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100613 goto failed;
Stefan Richter1f3125a2008-12-05 22:44:42 +0100614 }
615
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +0100616 e->r.resource.release = release_transaction;
617 ret = add_client_resource(client, &e->r.resource, GFP_KERNEL);
618 if (ret < 0)
619 goto failed;
620
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +0100621 fw_send_request(client->device->card, &e->r.transaction,
Stefan Richter664d8012009-03-10 21:01:54 +0100622 request->tcode, destination_id, request->generation,
623 speed, request->offset, e->response.data,
624 request->length, complete_transaction, e);
625 return 0;
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +0100626
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +0100627 failed:
628 kfree(e);
629
630 return ret;
631}
632
Stefan Richter6e95dea2010-02-21 17:56:21 +0100633static int ioctl_send_request(struct client *client, union ioctl_arg *arg)
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +0100634{
Stefan Richter6e95dea2010-02-21 17:56:21 +0100635 switch (arg->send_request.tcode) {
Stefan Richter1f3125a2008-12-05 22:44:42 +0100636 case TCODE_WRITE_QUADLET_REQUEST:
637 case TCODE_WRITE_BLOCK_REQUEST:
638 case TCODE_READ_QUADLET_REQUEST:
639 case TCODE_READ_BLOCK_REQUEST:
640 case TCODE_LOCK_MASK_SWAP:
641 case TCODE_LOCK_COMPARE_SWAP:
642 case TCODE_LOCK_FETCH_ADD:
643 case TCODE_LOCK_LITTLE_ADD:
644 case TCODE_LOCK_BOUNDED_ADD:
645 case TCODE_LOCK_WRAP_ADD:
646 case TCODE_LOCK_VENDOR_DEPENDENT:
647 break;
648 default:
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +0100649 return -EINVAL;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500650 }
651
Stefan Richter6e95dea2010-02-21 17:56:21 +0100652 return init_request(client, &arg->send_request, client->device->node_id,
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +0100653 client->device->max_speed);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500654}
655
Stefan Richter281e2032010-01-24 16:45:03 +0100656static inline bool is_fcp_request(struct fw_request *request)
657{
658 return request == NULL;
659}
660
Stefan Richter53dca512008-12-14 21:47:04 +0100661static void release_request(struct client *client,
662 struct client_resource *resource)
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400663{
Stefan Richter97c18b72009-01-04 16:23:29 +0100664 struct inbound_transaction_resource *r = container_of(resource,
665 struct inbound_transaction_resource, resource);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400666
Stefan Richter281e2032010-01-24 16:45:03 +0100667 if (is_fcp_request(r->request))
668 kfree(r->data);
669 else
Jay Fenlason08bd34c2010-05-18 14:02:45 -0400670 fw_send_response(r->card, r->request, RCODE_CONFLICT_ERROR);
Stefan Richter0244f572010-06-20 22:52:27 +0200671
672 fw_card_put(r->card);
Stefan Richter97c18b72009-01-04 16:23:29 +0100673 kfree(r);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400674}
675
Stefan Richter97c18b72009-01-04 16:23:29 +0100676static void handle_request(struct fw_card *card, struct fw_request *request,
Stefan Richter53dca512008-12-14 21:47:04 +0100677 int tcode, int destination, int source,
Stefan Richter33e553f2010-06-20 22:50:35 +0200678 int generation, unsigned long long offset,
Stefan Richter53dca512008-12-14 21:47:04 +0100679 void *payload, size_t length, void *callback_data)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500680{
Stefan Richter97c18b72009-01-04 16:23:29 +0100681 struct address_handler_resource *handler = callback_data;
682 struct inbound_transaction_resource *r;
683 struct inbound_transaction_event *e;
Stefan Richtere2055972010-06-20 22:53:55 +0200684 size_t event_size0;
Stefan Richter281e2032010-01-24 16:45:03 +0100685 void *fcp_frame = NULL;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100686 int ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500687
Stefan Richter0244f572010-06-20 22:52:27 +0200688 /* card may be different from handler->client->device->card */
689 fw_card_get(card);
690
Stefan Richter97c18b72009-01-04 16:23:29 +0100691 r = kmalloc(sizeof(*r), GFP_ATOMIC);
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400692 e = kmalloc(sizeof(*e), GFP_ATOMIC);
Stefan Richterbf54e142010-07-16 22:25:51 +0200693 if (r == NULL || e == NULL) {
694 fw_notify("Out of memory when allocating event\n");
Jay Fenlason45ee3192008-12-21 16:47:17 +0100695 goto failed;
Stefan Richterbf54e142010-07-16 22:25:51 +0200696 }
Jay Fenlason08bd34c2010-05-18 14:02:45 -0400697 r->card = card;
Stefan Richter97c18b72009-01-04 16:23:29 +0100698 r->request = request;
699 r->data = payload;
700 r->length = length;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500701
Stefan Richter281e2032010-01-24 16:45:03 +0100702 if (is_fcp_request(request)) {
703 /*
704 * FIXME: Let core-transaction.c manage a
705 * single reference-counted copy?
706 */
707 fcp_frame = kmemdup(payload, length, GFP_ATOMIC);
708 if (fcp_frame == NULL)
709 goto failed;
710
711 r->data = fcp_frame;
712 }
713
Stefan Richter97c18b72009-01-04 16:23:29 +0100714 r->resource.release = release_request;
715 ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100716 if (ret < 0)
717 goto failed;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500718
Stefan Richtere2055972010-06-20 22:53:55 +0200719 if (handler->client->version < FW_CDEV_VERSION_EVENT_REQUEST2) {
720 struct fw_cdev_event_request *req = &e->req.request;
721
722 if (tcode & 0x10)
723 tcode = TCODE_LOCK_REQUEST;
724
725 req->type = FW_CDEV_EVENT_REQUEST;
726 req->tcode = tcode;
727 req->offset = offset;
728 req->length = length;
729 req->handle = r->resource.handle;
730 req->closure = handler->closure;
731 event_size0 = sizeof(*req);
732 } else {
733 struct fw_cdev_event_request2 *req = &e->req.request2;
734
735 req->type = FW_CDEV_EVENT_REQUEST2;
736 req->tcode = tcode;
737 req->offset = offset;
738 req->source_node_id = source;
739 req->destination_node_id = destination;
740 req->card = card->index;
741 req->generation = generation;
742 req->length = length;
743 req->handle = r->resource.handle;
744 req->closure = handler->closure;
745 event_size0 = sizeof(*req);
746 }
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500747
Stefan Richter97c18b72009-01-04 16:23:29 +0100748 queue_event(handler->client, &e->event,
Stefan Richtere2055972010-06-20 22:53:55 +0200749 &e->req, event_size0, r->data, length);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100750 return;
751
752 failed:
Stefan Richter97c18b72009-01-04 16:23:29 +0100753 kfree(r);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100754 kfree(e);
Stefan Richter281e2032010-01-24 16:45:03 +0100755 kfree(fcp_frame);
756
757 if (!is_fcp_request(request))
Clemens Ladischdb5d2472009-12-24 12:05:58 +0100758 fw_send_response(card, request, RCODE_CONFLICT_ERROR);
Stefan Richter0244f572010-06-20 22:52:27 +0200759
760 fw_card_put(card);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500761}
762
Stefan Richter53dca512008-12-14 21:47:04 +0100763static void release_address_handler(struct client *client,
764 struct client_resource *resource)
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400765{
Stefan Richter97c18b72009-01-04 16:23:29 +0100766 struct address_handler_resource *r =
767 container_of(resource, struct address_handler_resource, resource);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400768
Stefan Richter97c18b72009-01-04 16:23:29 +0100769 fw_core_remove_address_handler(&r->handler);
770 kfree(r);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400771}
772
Stefan Richter6e95dea2010-02-21 17:56:21 +0100773static int ioctl_allocate(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500774{
Stefan Richter6e95dea2010-02-21 17:56:21 +0100775 struct fw_cdev_allocate *a = &arg->allocate;
Stefan Richter97c18b72009-01-04 16:23:29 +0100776 struct address_handler_resource *r;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500777 struct fw_address_region region;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100778 int ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500779
Stefan Richter97c18b72009-01-04 16:23:29 +0100780 r = kmalloc(sizeof(*r), GFP_KERNEL);
781 if (r == NULL)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500782 return -ENOMEM;
783
Stefan Richter6e95dea2010-02-21 17:56:21 +0100784 region.start = a->offset;
Stefan Richter8e2b2b42010-07-23 13:05:39 +0200785 if (client->version < FW_CDEV_VERSION_ALLOCATE_REGION_END)
786 region.end = a->offset + a->length;
787 else
788 region.end = a->region_end;
789
Stefan Richter6e95dea2010-02-21 17:56:21 +0100790 r->handler.length = a->length;
Stefan Richter97c18b72009-01-04 16:23:29 +0100791 r->handler.address_callback = handle_request;
Stefan Richter6e95dea2010-02-21 17:56:21 +0100792 r->handler.callback_data = r;
793 r->closure = a->closure;
794 r->client = client;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500795
Stefan Richter97c18b72009-01-04 16:23:29 +0100796 ret = fw_core_add_address_handler(&r->handler, &region);
Stefan Richter3e0b5f02008-12-14 19:21:01 +0100797 if (ret < 0) {
Stefan Richter97c18b72009-01-04 16:23:29 +0100798 kfree(r);
Stefan Richter3e0b5f02008-12-14 19:21:01 +0100799 return ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500800 }
Stefan Richter8e2b2b42010-07-23 13:05:39 +0200801 a->offset = r->handler.offset;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500802
Stefan Richter97c18b72009-01-04 16:23:29 +0100803 r->resource.release = release_address_handler;
804 ret = add_client_resource(client, &r->resource, GFP_KERNEL);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100805 if (ret < 0) {
Stefan Richter97c18b72009-01-04 16:23:29 +0100806 release_address_handler(client, &r->resource);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100807 return ret;
808 }
Stefan Richter6e95dea2010-02-21 17:56:21 +0100809 a->handle = r->resource.handle;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500810
811 return 0;
812}
813
Stefan Richter6e95dea2010-02-21 17:56:21 +0100814static int ioctl_deallocate(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg94723162007-03-14 17:34:55 -0400815{
Stefan Richter6e95dea2010-02-21 17:56:21 +0100816 return release_client_resource(client, arg->deallocate.handle,
Jay Fenlason45ee3192008-12-21 16:47:17 +0100817 release_address_handler, NULL);
Kristian Høgsberg94723162007-03-14 17:34:55 -0400818}
819
Stefan Richter6e95dea2010-02-21 17:56:21 +0100820static int ioctl_send_response(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500821{
Stefan Richter6e95dea2010-02-21 17:56:21 +0100822 struct fw_cdev_send_response *a = &arg->send_response;
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400823 struct client_resource *resource;
Stefan Richter97c18b72009-01-04 16:23:29 +0100824 struct inbound_transaction_resource *r;
Stefan Richter7e44c0b2009-10-08 00:39:56 +0200825 int ret = 0;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500826
Stefan Richter6e95dea2010-02-21 17:56:21 +0100827 if (release_client_resource(client, a->handle,
Jay Fenlason45ee3192008-12-21 16:47:17 +0100828 release_request, &resource) < 0)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500829 return -EINVAL;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100830
Stefan Richter97c18b72009-01-04 16:23:29 +0100831 r = container_of(resource, struct inbound_transaction_resource,
832 resource);
Stefan Richter281e2032010-01-24 16:45:03 +0100833 if (is_fcp_request(r->request))
834 goto out;
835
Clemens Ladischa10c0ce72010-05-19 08:28:32 +0200836 if (a->length != fw_get_response_length(r->request)) {
837 ret = -EINVAL;
838 kfree(r->request);
839 goto out;
840 }
841 if (copy_from_user(r->data, u64_to_uptr(a->data), a->length)) {
Stefan Richter281e2032010-01-24 16:45:03 +0100842 ret = -EFAULT;
843 kfree(r->request);
844 goto out;
Stefan Richter7e44c0b2009-10-08 00:39:56 +0200845 }
Jay Fenlason08bd34c2010-05-18 14:02:45 -0400846 fw_send_response(r->card, r->request, a->rcode);
Stefan Richter7e44c0b2009-10-08 00:39:56 +0200847 out:
Stefan Richter0244f572010-06-20 22:52:27 +0200848 fw_card_put(r->card);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500849 kfree(r);
850
Stefan Richter7e44c0b2009-10-08 00:39:56 +0200851 return ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500852}
853
Stefan Richter6e95dea2010-02-21 17:56:21 +0100854static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg53718422007-03-07 12:12:42 -0500855{
Stefan Richter02d37be2010-07-08 16:09:06 +0200856 fw_schedule_bus_reset(client->device->card, true,
Stefan Richter6e95dea2010-02-21 17:56:21 +0100857 arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET);
Stefan Richter02d37be2010-07-08 16:09:06 +0200858 return 0;
Kristian Høgsberg53718422007-03-07 12:12:42 -0500859}
860
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400861static void release_descriptor(struct client *client,
862 struct client_resource *resource)
863{
Stefan Richter97c18b72009-01-04 16:23:29 +0100864 struct descriptor_resource *r =
865 container_of(resource, struct descriptor_resource, resource);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400866
Stefan Richter97c18b72009-01-04 16:23:29 +0100867 fw_core_remove_descriptor(&r->descriptor);
868 kfree(r);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400869}
870
Stefan Richter6e95dea2010-02-21 17:56:21 +0100871static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200872{
Stefan Richter6e95dea2010-02-21 17:56:21 +0100873 struct fw_cdev_add_descriptor *a = &arg->add_descriptor;
Stefan Richter97c18b72009-01-04 16:23:29 +0100874 struct descriptor_resource *r;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100875 int ret;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200876
Stefan Richterde487da2009-03-10 21:00:23 +0100877 /* Access policy: Allow this ioctl only on local nodes' device files. */
Stefan Richter92368892009-05-13 21:42:14 +0200878 if (!client->device->is_local)
Stefan Richterde487da2009-03-10 21:00:23 +0100879 return -ENOSYS;
880
Stefan Richter6e95dea2010-02-21 17:56:21 +0100881 if (a->length > 256)
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200882 return -EINVAL;
883
Stefan Richter6e95dea2010-02-21 17:56:21 +0100884 r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL);
Stefan Richter97c18b72009-01-04 16:23:29 +0100885 if (r == NULL)
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200886 return -ENOMEM;
887
Stefan Richter6e95dea2010-02-21 17:56:21 +0100888 if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) {
Jay Fenlason45ee3192008-12-21 16:47:17 +0100889 ret = -EFAULT;
890 goto failed;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200891 }
892
Stefan Richter6e95dea2010-02-21 17:56:21 +0100893 r->descriptor.length = a->length;
894 r->descriptor.immediate = a->immediate;
895 r->descriptor.key = a->key;
Stefan Richter97c18b72009-01-04 16:23:29 +0100896 r->descriptor.data = r->data;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200897
Stefan Richter97c18b72009-01-04 16:23:29 +0100898 ret = fw_core_add_descriptor(&r->descriptor);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100899 if (ret < 0)
900 goto failed;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200901
Stefan Richter97c18b72009-01-04 16:23:29 +0100902 r->resource.release = release_descriptor;
903 ret = add_client_resource(client, &r->resource, GFP_KERNEL);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100904 if (ret < 0) {
Stefan Richter97c18b72009-01-04 16:23:29 +0100905 fw_core_remove_descriptor(&r->descriptor);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100906 goto failed;
907 }
Stefan Richter6e95dea2010-02-21 17:56:21 +0100908 a->handle = r->resource.handle;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200909
910 return 0;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100911 failed:
Stefan Richter97c18b72009-01-04 16:23:29 +0100912 kfree(r);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100913
914 return ret;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200915}
916
Stefan Richter6e95dea2010-02-21 17:56:21 +0100917static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200918{
Stefan Richter6e95dea2010-02-21 17:56:21 +0100919 return release_client_resource(client, arg->remove_descriptor.handle,
Jay Fenlason45ee3192008-12-21 16:47:17 +0100920 release_descriptor, NULL);
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200921}
922
Stefan Richter53dca512008-12-14 21:47:04 +0100923static void iso_callback(struct fw_iso_context *context, u32 cycle,
924 size_t header_length, void *header, void *data)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500925{
926 struct client *client = data;
Stefan Richter97c18b72009-01-04 16:23:29 +0100927 struct iso_interrupt_event *e;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500928
Stefan Richter56d04cb2010-06-08 00:20:10 +0200929 e = kmalloc(sizeof(*e) + header_length, GFP_ATOMIC);
Stefan Richterbf54e142010-07-16 22:25:51 +0200930 if (e == NULL) {
931 fw_notify("Out of memory when allocating event\n");
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500932 return;
Stefan Richterbf54e142010-07-16 22:25:51 +0200933 }
Stefan Richter97c18b72009-01-04 16:23:29 +0100934 e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT;
935 e->interrupt.closure = client->iso_closure;
936 e->interrupt.cycle = cycle;
937 e->interrupt.header_length = header_length;
938 memcpy(e->interrupt.header, header, header_length);
939 queue_event(client, &e->event, &e->interrupt,
940 sizeof(e->interrupt) + header_length, NULL, 0);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500941}
942
Stefan Richter872e3302010-07-29 18:19:22 +0200943static void iso_mc_callback(struct fw_iso_context *context,
944 dma_addr_t completed, void *data)
945{
946 struct client *client = data;
947 struct iso_interrupt_mc_event *e;
948
949 e = kmalloc(sizeof(*e), GFP_ATOMIC);
950 if (e == NULL) {
951 fw_notify("Out of memory when allocating event\n");
952 return;
953 }
954 e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL;
955 e->interrupt.closure = client->iso_closure;
956 e->interrupt.completed = fw_iso_buffer_lookup(&client->buffer,
957 completed);
958 queue_event(client, &e->event, &e->interrupt,
959 sizeof(e->interrupt), NULL, 0);
960}
961
Stefan Richter6e95dea2010-02-21 17:56:21 +0100962static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500963{
Stefan Richter6e95dea2010-02-21 17:56:21 +0100964 struct fw_cdev_create_iso_context *a = &arg->create_iso_context;
Kristian Høgsberg24315c52007-06-20 17:48:07 -0400965 struct fw_iso_context *context;
Stefan Richter872e3302010-07-29 18:19:22 +0200966 fw_iso_callback_t cb;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500967
Stefan Richtereb5b35a2010-07-07 14:13:14 +0200968 BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT != FW_ISO_CONTEXT_TRANSMIT ||
Stefan Richter872e3302010-07-29 18:19:22 +0200969 FW_CDEV_ISO_CONTEXT_RECEIVE != FW_ISO_CONTEXT_RECEIVE ||
970 FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL !=
971 FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL);
Kristian Høgsberg21efb3c2007-02-16 17:34:50 -0500972
Stefan Richter6e95dea2010-02-21 17:56:21 +0100973 switch (a->type) {
Stefan Richter872e3302010-07-29 18:19:22 +0200974 case FW_ISO_CONTEXT_TRANSMIT:
975 if (a->speed > SCODE_3200 || a->channel > 63)
Kristian Høgsbergc70dc782007-03-14 17:34:53 -0400976 return -EINVAL;
Stefan Richter872e3302010-07-29 18:19:22 +0200977
978 cb = iso_callback;
Kristian Høgsbergc70dc782007-03-14 17:34:53 -0400979 break;
980
Stefan Richter872e3302010-07-29 18:19:22 +0200981 case FW_ISO_CONTEXT_RECEIVE:
982 if (a->header_size < 4 || (a->header_size & 3) ||
983 a->channel > 63)
Kristian Høgsbergc70dc782007-03-14 17:34:53 -0400984 return -EINVAL;
Stefan Richter872e3302010-07-29 18:19:22 +0200985
986 cb = iso_callback;
987 break;
988
989 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
990 cb = (fw_iso_callback_t)iso_mc_callback;
Kristian Høgsbergc70dc782007-03-14 17:34:53 -0400991 break;
992
993 default:
Kristian Høgsberg21efb3c2007-02-16 17:34:50 -0500994 return -EINVAL;
Kristian Høgsbergc70dc782007-03-14 17:34:53 -0400995 }
996
Stefan Richter6e95dea2010-02-21 17:56:21 +0100997 context = fw_iso_context_create(client->device->card, a->type,
Stefan Richter872e3302010-07-29 18:19:22 +0200998 a->channel, a->speed, a->header_size, cb, client);
Kristian Høgsberg24315c52007-06-20 17:48:07 -0400999 if (IS_ERR(context))
1000 return PTR_ERR(context);
1001
Clemens Ladischbdfe2732010-06-14 11:46:25 +02001002 /* We only support one context at this time. */
1003 spin_lock_irq(&client->lock);
1004 if (client->iso_context != NULL) {
1005 spin_unlock_irq(&client->lock);
1006 fw_iso_context_destroy(context);
1007 return -EBUSY;
1008 }
Stefan Richter6e95dea2010-02-21 17:56:21 +01001009 client->iso_closure = a->closure;
Kristian Høgsberg24315c52007-06-20 17:48:07 -04001010 client->iso_context = context;
Clemens Ladischbdfe2732010-06-14 11:46:25 +02001011 spin_unlock_irq(&client->lock);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001012
Stefan Richter6e95dea2010-02-21 17:56:21 +01001013 a->handle = 0;
Kristian Høgsbergabaa5742007-04-30 15:03:14 -04001014
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001015 return 0;
1016}
1017
Stefan Richter872e3302010-07-29 18:19:22 +02001018static int ioctl_set_iso_channels(struct client *client, union ioctl_arg *arg)
1019{
1020 struct fw_cdev_set_iso_channels *a = &arg->set_iso_channels;
1021 struct fw_iso_context *ctx = client->iso_context;
1022
1023 if (ctx == NULL || a->handle != 0)
1024 return -EINVAL;
1025
1026 return fw_iso_context_set_channels(ctx, &a->channels);
1027}
1028
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -04001029/* Macros for decoding the iso packet control header. */
1030#define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff)
1031#define GET_INTERRUPT(v) (((v) >> 16) & 0x01)
1032#define GET_SKIP(v) (((v) >> 17) & 0x01)
Stefan Richter7a100342008-09-12 18:09:55 +02001033#define GET_TAG(v) (((v) >> 18) & 0x03)
1034#define GET_SY(v) (((v) >> 20) & 0x0f)
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -04001035#define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff)
1036
Stefan Richter6e95dea2010-02-21 17:56:21 +01001037static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001038{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001039 struct fw_cdev_queue_iso *a = &arg->queue_iso;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001040 struct fw_cdev_iso_packet __user *p, *end, *next;
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -05001041 struct fw_iso_context *ctx = client->iso_context;
Stefan Richter872e3302010-07-29 18:19:22 +02001042 unsigned long payload, buffer_end, transmit_header_bytes = 0;
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -04001043 u32 control;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001044 int count;
1045 struct {
1046 struct fw_iso_packet packet;
1047 u8 header[256];
1048 } u;
1049
Stefan Richter6e95dea2010-02-21 17:56:21 +01001050 if (ctx == NULL || a->handle != 0)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001051 return -EINVAL;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001052
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001053 /*
1054 * If the user passes a non-NULL data pointer, has mmap()'ed
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001055 * the iso buffer, and the pointer points inside the buffer,
1056 * we setup the payload pointers accordingly. Otherwise we
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001057 * set them both to 0, which will still let packets with
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001058 * payload_length == 0 through. In other words, if no packets
1059 * use the indirect payload, the iso buffer need not be mapped
Stefan Richter6e95dea2010-02-21 17:56:21 +01001060 * and the a->data pointer is ignored.
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001061 */
Stefan Richter6e95dea2010-02-21 17:56:21 +01001062 payload = (unsigned long)a->data - client->vm_start;
Kristian Høgsbergef370ee2007-03-28 20:46:23 +02001063 buffer_end = client->buffer.page_count << PAGE_SHIFT;
Stefan Richter6e95dea2010-02-21 17:56:21 +01001064 if (a->data == 0 || client->buffer.pages == NULL ||
Kristian Høgsbergef370ee2007-03-28 20:46:23 +02001065 payload >= buffer_end) {
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001066 payload = 0;
Kristian Høgsbergef370ee2007-03-28 20:46:23 +02001067 buffer_end = 0;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001068 }
1069
Stefan Richter872e3302010-07-29 18:19:22 +02001070 if (ctx->type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL && payload & 3)
1071 return -EINVAL;
Al Viro1ccc9142007-10-14 19:34:40 +01001072
Stefan Richter872e3302010-07-29 18:19:22 +02001073 p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets);
Stefan Richter6e95dea2010-02-21 17:56:21 +01001074 if (!access_ok(VERIFY_READ, p, a->size))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001075 return -EFAULT;
1076
Stefan Richter6e95dea2010-02-21 17:56:21 +01001077 end = (void __user *)p + a->size;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001078 count = 0;
1079 while (p < end) {
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -04001080 if (get_user(control, &p->control))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001081 return -EFAULT;
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -04001082 u.packet.payload_length = GET_PAYLOAD_LENGTH(control);
1083 u.packet.interrupt = GET_INTERRUPT(control);
1084 u.packet.skip = GET_SKIP(control);
1085 u.packet.tag = GET_TAG(control);
1086 u.packet.sy = GET_SY(control);
1087 u.packet.header_length = GET_HEADER_LENGTH(control);
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05001088
Stefan Richter872e3302010-07-29 18:19:22 +02001089 switch (ctx->type) {
1090 case FW_ISO_CONTEXT_TRANSMIT:
1091 if (u.packet.header_length & 3)
Clemens Ladisch385ab5bc2010-03-31 16:26:46 +02001092 return -EINVAL;
Stefan Richterae2a97662010-07-29 09:31:56 +02001093 transmit_header_bytes = u.packet.header_length;
Stefan Richter872e3302010-07-29 18:19:22 +02001094 break;
1095
1096 case FW_ISO_CONTEXT_RECEIVE:
Stefan Richter69e61d02010-07-28 23:49:45 +02001097 if (u.packet.header_length == 0 ||
1098 u.packet.header_length % ctx->header_size != 0)
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05001099 return -EINVAL;
Stefan Richter872e3302010-07-29 18:19:22 +02001100 break;
1101
1102 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
1103 if (u.packet.payload_length == 0 ||
1104 u.packet.payload_length & 3)
1105 return -EINVAL;
1106 break;
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05001107 }
1108
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001109 next = (struct fw_cdev_iso_packet __user *)
Stefan Richterae2a97662010-07-29 09:31:56 +02001110 &p->header[transmit_header_bytes / 4];
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001111 if (next > end)
1112 return -EINVAL;
1113 if (__copy_from_user
Stefan Richterae2a97662010-07-29 09:31:56 +02001114 (u.packet.header, p->header, transmit_header_bytes))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001115 return -EFAULT;
Kristian Høgsberg98b6cbe2007-02-16 17:34:51 -05001116 if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT &&
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001117 u.packet.header_length + u.packet.payload_length > 0)
1118 return -EINVAL;
Kristian Høgsbergef370ee2007-03-28 20:46:23 +02001119 if (payload + u.packet.payload_length > buffer_end)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001120 return -EINVAL;
1121
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -05001122 if (fw_iso_context_queue(ctx, &u.packet,
1123 &client->buffer, payload))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001124 break;
1125
1126 p = next;
1127 payload += u.packet.payload_length;
1128 count++;
1129 }
Clemens Ladisch13882a82011-05-02 09:33:56 +02001130 fw_iso_context_queue_flush(ctx);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001131
Stefan Richter6e95dea2010-02-21 17:56:21 +01001132 a->size -= uptr_to_u64(p) - a->packets;
1133 a->packets = uptr_to_u64(p);
1134 a->data = client->vm_start + payload;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001135
1136 return count;
1137}
1138
Stefan Richter6e95dea2010-02-21 17:56:21 +01001139static int ioctl_start_iso(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001140{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001141 struct fw_cdev_start_iso *a = &arg->start_iso;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001142
Stefan Richtereb5b35a2010-07-07 14:13:14 +02001143 BUILD_BUG_ON(
1144 FW_CDEV_ISO_CONTEXT_MATCH_TAG0 != FW_ISO_CONTEXT_MATCH_TAG0 ||
1145 FW_CDEV_ISO_CONTEXT_MATCH_TAG1 != FW_ISO_CONTEXT_MATCH_TAG1 ||
1146 FW_CDEV_ISO_CONTEXT_MATCH_TAG2 != FW_ISO_CONTEXT_MATCH_TAG2 ||
1147 FW_CDEV_ISO_CONTEXT_MATCH_TAG3 != FW_ISO_CONTEXT_MATCH_TAG3 ||
1148 FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS != FW_ISO_CONTEXT_MATCH_ALL_TAGS);
1149
Stefan Richter6e95dea2010-02-21 17:56:21 +01001150 if (client->iso_context == NULL || a->handle != 0)
Kristian Høgsbergabaa5742007-04-30 15:03:14 -04001151 return -EINVAL;
Stefan Richterfae60312008-02-20 21:10:06 +01001152
Stefan Richter6e95dea2010-02-21 17:56:21 +01001153 if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE &&
1154 (a->tags == 0 || a->tags > 15 || a->sync > 15))
1155 return -EINVAL;
Kristian Høgsbergeb0306e2007-03-14 17:34:54 -04001156
Stefan Richter6e95dea2010-02-21 17:56:21 +01001157 return fw_iso_context_start(client->iso_context,
1158 a->cycle, a->sync, a->tags);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001159}
1160
Stefan Richter6e95dea2010-02-21 17:56:21 +01001161static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg)
Kristian Høgsbergb8295662007-02-16 17:34:42 -05001162{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001163 struct fw_cdev_stop_iso *a = &arg->stop_iso;
Kristian Høgsbergabaa5742007-04-30 15:03:14 -04001164
Stefan Richter6e95dea2010-02-21 17:56:21 +01001165 if (client->iso_context == NULL || a->handle != 0)
Kristian Høgsbergabaa5742007-04-30 15:03:14 -04001166 return -EINVAL;
1167
Kristian Høgsbergb8295662007-02-16 17:34:42 -05001168 return fw_iso_context_stop(client->iso_context);
1169}
1170
Stefan Richter6e95dea2010-02-21 17:56:21 +01001171static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg)
Stefan Richtera64408b2007-09-29 10:41:58 +02001172{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001173 struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2;
Stefan Richtera64408b2007-09-29 10:41:58 +02001174 struct fw_card *card = client->device->card;
Stefan Richterabfe5a02010-02-20 12:13:49 +01001175 struct timespec ts = {0, 0};
Stefan Richter4a9bde92010-02-20 22:24:43 +01001176 u32 cycle_time;
Stefan Richterabfe5a02010-02-20 12:13:49 +01001177 int ret = 0;
Stefan Richtera64408b2007-09-29 10:41:58 +02001178
Stefan Richter4a9bde92010-02-20 22:24:43 +01001179 local_irq_disable();
Stefan Richtera64408b2007-09-29 10:41:58 +02001180
Stefan Richter0fcff4e2010-06-12 20:35:52 +02001181 cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME);
Stefan Richterabfe5a02010-02-20 12:13:49 +01001182
Stefan Richter6e95dea2010-02-21 17:56:21 +01001183 switch (a->clk_id) {
Stefan Richterabfe5a02010-02-20 12:13:49 +01001184 case CLOCK_REALTIME: getnstimeofday(&ts); break;
1185 case CLOCK_MONOTONIC: do_posix_clock_monotonic_gettime(&ts); break;
1186 case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts); break;
1187 default:
1188 ret = -EINVAL;
1189 }
Stefan Richtera64408b2007-09-29 10:41:58 +02001190
Stefan Richter4a9bde92010-02-20 22:24:43 +01001191 local_irq_enable();
Stefan Richtera64408b2007-09-29 10:41:58 +02001192
Stefan Richter6e95dea2010-02-21 17:56:21 +01001193 a->tv_sec = ts.tv_sec;
1194 a->tv_nsec = ts.tv_nsec;
1195 a->cycle_timer = cycle_time;
Stefan Richterabfe5a02010-02-20 12:13:49 +01001196
1197 return ret;
1198}
1199
Stefan Richter6e95dea2010-02-21 17:56:21 +01001200static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg)
Stefan Richterabfe5a02010-02-20 12:13:49 +01001201{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001202 struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer;
Stefan Richterabfe5a02010-02-20 12:13:49 +01001203 struct fw_cdev_get_cycle_timer2 ct2;
1204
1205 ct2.clk_id = CLOCK_REALTIME;
Stefan Richter6e95dea2010-02-21 17:56:21 +01001206 ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2);
Stefan Richterabfe5a02010-02-20 12:13:49 +01001207
Stefan Richter6e95dea2010-02-21 17:56:21 +01001208 a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC;
1209 a->cycle_timer = ct2.cycle_timer;
Stefan Richter4a9bde92010-02-20 22:24:43 +01001210
Stefan Richtera64408b2007-09-29 10:41:58 +02001211 return 0;
1212}
1213
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001214static void iso_resource_work(struct work_struct *work)
1215{
1216 struct iso_resource_event *e;
1217 struct iso_resource *r =
1218 container_of(work, struct iso_resource, work.work);
1219 struct client *client = r->client;
1220 int generation, channel, bandwidth, todo;
1221 bool skip, free, success;
1222
1223 spin_lock_irq(&client->lock);
1224 generation = client->device->generation;
1225 todo = r->todo;
1226 /* Allow 1000ms grace period for other reallocations. */
1227 if (todo == ISO_RES_ALLOC &&
Clemens Ladische71084a2011-01-22 15:05:03 +01001228 time_before64(get_jiffies_64(),
1229 client->device->card->reset_jiffies + HZ)) {
Stefan Richter9fb551b2009-10-08 00:41:10 +02001230 schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3));
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001231 skip = true;
1232 } else {
1233 /* We could be called twice within the same generation. */
1234 skip = todo == ISO_RES_REALLOC &&
1235 r->generation == generation;
1236 }
Stefan Richter1ec3c022009-01-04 16:23:29 +01001237 free = todo == ISO_RES_DEALLOC ||
1238 todo == ISO_RES_ALLOC_ONCE ||
1239 todo == ISO_RES_DEALLOC_ONCE;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001240 r->generation = generation;
1241 spin_unlock_irq(&client->lock);
1242
1243 if (skip)
1244 goto out;
1245
1246 bandwidth = r->bandwidth;
1247
1248 fw_iso_resource_manage(client->device->card, generation,
1249 r->channels, &channel, &bandwidth,
Stefan Richter1ec3c022009-01-04 16:23:29 +01001250 todo == ISO_RES_ALLOC ||
1251 todo == ISO_RES_REALLOC ||
Stefan Richterf30e6d32011-04-22 15:13:54 +02001252 todo == ISO_RES_ALLOC_ONCE);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001253 /*
1254 * Is this generation outdated already? As long as this resource sticks
1255 * in the idr, it will be scheduled again for a newer generation or at
1256 * shutdown.
1257 */
1258 if (channel == -EAGAIN &&
1259 (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC))
1260 goto out;
1261
1262 success = channel >= 0 || bandwidth > 0;
1263
1264 spin_lock_irq(&client->lock);
1265 /*
1266 * Transit from allocation to reallocation, except if the client
1267 * requested deallocation in the meantime.
1268 */
1269 if (r->todo == ISO_RES_ALLOC)
1270 r->todo = ISO_RES_REALLOC;
1271 /*
1272 * Allocation or reallocation failure? Pull this resource out of the
1273 * idr and prepare for deletion, unless the client is shutting down.
1274 */
1275 if (r->todo == ISO_RES_REALLOC && !success &&
1276 !client->in_shutdown &&
1277 idr_find(&client->resource_idr, r->resource.handle)) {
1278 idr_remove(&client->resource_idr, r->resource.handle);
1279 client_put(client);
1280 free = true;
1281 }
1282 spin_unlock_irq(&client->lock);
1283
1284 if (todo == ISO_RES_ALLOC && channel >= 0)
Stefan Richter5d9cb7d272009-01-08 23:07:40 +01001285 r->channels = 1ULL << channel;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001286
1287 if (todo == ISO_RES_REALLOC && success)
1288 goto out;
1289
Stefan Richter1ec3c022009-01-04 16:23:29 +01001290 if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) {
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001291 e = r->e_alloc;
1292 r->e_alloc = NULL;
1293 } else {
1294 e = r->e_dealloc;
1295 r->e_dealloc = NULL;
1296 }
Stefan Richtere21fcf72009-10-08 00:41:38 +02001297 e->iso_resource.handle = r->resource.handle;
1298 e->iso_resource.channel = channel;
1299 e->iso_resource.bandwidth = bandwidth;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001300
1301 queue_event(client, &e->event,
Stefan Richtere21fcf72009-10-08 00:41:38 +02001302 &e->iso_resource, sizeof(e->iso_resource), NULL, 0);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001303
1304 if (free) {
1305 cancel_delayed_work(&r->work);
1306 kfree(r->e_alloc);
1307 kfree(r->e_dealloc);
1308 kfree(r);
1309 }
1310 out:
1311 client_put(client);
1312}
1313
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001314static void release_iso_resource(struct client *client,
1315 struct client_resource *resource)
1316{
1317 struct iso_resource *r =
1318 container_of(resource, struct iso_resource, resource);
1319
1320 spin_lock_irq(&client->lock);
1321 r->todo = ISO_RES_DEALLOC;
Stefan Richter9fb551b2009-10-08 00:41:10 +02001322 schedule_iso_resource(r, 0);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001323 spin_unlock_irq(&client->lock);
1324}
1325
Stefan Richter1ec3c022009-01-04 16:23:29 +01001326static int init_iso_resource(struct client *client,
1327 struct fw_cdev_allocate_iso_resource *request, int todo)
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001328{
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001329 struct iso_resource_event *e1, *e2;
1330 struct iso_resource *r;
1331 int ret;
1332
1333 if ((request->channels == 0 && request->bandwidth == 0) ||
1334 request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL ||
1335 request->bandwidth < 0)
1336 return -EINVAL;
1337
1338 r = kmalloc(sizeof(*r), GFP_KERNEL);
1339 e1 = kmalloc(sizeof(*e1), GFP_KERNEL);
1340 e2 = kmalloc(sizeof(*e2), GFP_KERNEL);
1341 if (r == NULL || e1 == NULL || e2 == NULL) {
1342 ret = -ENOMEM;
1343 goto fail;
1344 }
1345
1346 INIT_DELAYED_WORK(&r->work, iso_resource_work);
1347 r->client = client;
Stefan Richter1ec3c022009-01-04 16:23:29 +01001348 r->todo = todo;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001349 r->generation = -1;
1350 r->channels = request->channels;
1351 r->bandwidth = request->bandwidth;
1352 r->e_alloc = e1;
1353 r->e_dealloc = e2;
1354
Stefan Richtere21fcf72009-10-08 00:41:38 +02001355 e1->iso_resource.closure = request->closure;
1356 e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED;
1357 e2->iso_resource.closure = request->closure;
1358 e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001359
Stefan Richter1ec3c022009-01-04 16:23:29 +01001360 if (todo == ISO_RES_ALLOC) {
1361 r->resource.release = release_iso_resource;
1362 ret = add_client_resource(client, &r->resource, GFP_KERNEL);
Stefan Richter81610b82009-01-11 13:44:46 +01001363 if (ret < 0)
1364 goto fail;
Stefan Richter1ec3c022009-01-04 16:23:29 +01001365 } else {
1366 r->resource.release = NULL;
1367 r->resource.handle = -1;
Stefan Richter9fb551b2009-10-08 00:41:10 +02001368 schedule_iso_resource(r, 0);
Stefan Richter1ec3c022009-01-04 16:23:29 +01001369 }
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001370 request->handle = r->resource.handle;
1371
1372 return 0;
1373 fail:
1374 kfree(r);
1375 kfree(e1);
1376 kfree(e2);
1377
1378 return ret;
1379}
1380
Stefan Richter6e95dea2010-02-21 17:56:21 +01001381static int ioctl_allocate_iso_resource(struct client *client,
1382 union ioctl_arg *arg)
Stefan Richter1ec3c022009-01-04 16:23:29 +01001383{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001384 return init_iso_resource(client,
1385 &arg->allocate_iso_resource, ISO_RES_ALLOC);
Stefan Richter1ec3c022009-01-04 16:23:29 +01001386}
1387
Stefan Richter6e95dea2010-02-21 17:56:21 +01001388static int ioctl_deallocate_iso_resource(struct client *client,
1389 union ioctl_arg *arg)
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001390{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001391 return release_client_resource(client,
1392 arg->deallocate.handle, release_iso_resource, NULL);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001393}
1394
Stefan Richter6e95dea2010-02-21 17:56:21 +01001395static int ioctl_allocate_iso_resource_once(struct client *client,
1396 union ioctl_arg *arg)
Stefan Richter1ec3c022009-01-04 16:23:29 +01001397{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001398 return init_iso_resource(client,
1399 &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE);
Stefan Richter1ec3c022009-01-04 16:23:29 +01001400}
1401
Stefan Richter6e95dea2010-02-21 17:56:21 +01001402static int ioctl_deallocate_iso_resource_once(struct client *client,
1403 union ioctl_arg *arg)
Stefan Richter1ec3c022009-01-04 16:23:29 +01001404{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001405 return init_iso_resource(client,
1406 &arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE);
Stefan Richter1ec3c022009-01-04 16:23:29 +01001407}
1408
Stefan Richterc8a25902009-03-10 20:59:16 +01001409/*
1410 * Returns a speed code: Maximum speed to or from this device,
1411 * limited by the device's link speed, the local node's link speed,
1412 * and all PHY port speeds between the two links.
1413 */
Stefan Richter6e95dea2010-02-21 17:56:21 +01001414static int ioctl_get_speed(struct client *client, union ioctl_arg *arg)
Stefan Richter33580a32009-01-04 16:23:29 +01001415{
Stefan Richterc8a25902009-03-10 20:59:16 +01001416 return client->device->max_speed;
Stefan Richter33580a32009-01-04 16:23:29 +01001417}
1418
Stefan Richter6e95dea2010-02-21 17:56:21 +01001419static int ioctl_send_broadcast_request(struct client *client,
1420 union ioctl_arg *arg)
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +01001421{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001422 struct fw_cdev_send_request *a = &arg->send_request;
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +01001423
Stefan Richter6e95dea2010-02-21 17:56:21 +01001424 switch (a->tcode) {
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +01001425 case TCODE_WRITE_QUADLET_REQUEST:
1426 case TCODE_WRITE_BLOCK_REQUEST:
1427 break;
1428 default:
1429 return -EINVAL;
1430 }
1431
Stefan Richter1566f3d2009-01-04 16:23:29 +01001432 /* Security policy: Only allow accesses to Units Space. */
Stefan Richter6e95dea2010-02-21 17:56:21 +01001433 if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END)
Stefan Richter1566f3d2009-01-04 16:23:29 +01001434 return -EACCES;
1435
Stefan Richter6e95dea2010-02-21 17:56:21 +01001436 return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100);
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +01001437}
1438
Stefan Richter6e95dea2010-02-21 17:56:21 +01001439static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg)
Jay Fenlasonf8c22872009-03-05 19:08:40 +01001440{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001441 struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet;
Stefan Richter18e9b102009-03-10 21:02:21 +01001442 struct fw_cdev_send_request request;
1443 int dest;
Jay Fenlasonf8c22872009-03-05 19:08:40 +01001444
Stefan Richter6e95dea2010-02-21 17:56:21 +01001445 if (a->speed > client->device->card->link_speed ||
1446 a->length > 1024 << a->speed)
Stefan Richter18e9b102009-03-10 21:02:21 +01001447 return -EIO;
Jay Fenlasonf8c22872009-03-05 19:08:40 +01001448
Stefan Richter6e95dea2010-02-21 17:56:21 +01001449 if (a->tag > 3 || a->channel > 63 || a->sy > 15)
Stefan Richter18e9b102009-03-10 21:02:21 +01001450 return -EINVAL;
1451
Stefan Richter6e95dea2010-02-21 17:56:21 +01001452 dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy);
Stefan Richter18e9b102009-03-10 21:02:21 +01001453 request.tcode = TCODE_STREAM_DATA;
Stefan Richter6e95dea2010-02-21 17:56:21 +01001454 request.length = a->length;
1455 request.closure = a->closure;
1456 request.data = a->data;
1457 request.generation = a->generation;
Stefan Richter18e9b102009-03-10 21:02:21 +01001458
Stefan Richter6e95dea2010-02-21 17:56:21 +01001459 return init_request(client, &request, dest, a->speed);
Jay Fenlasonf8c22872009-03-05 19:08:40 +01001460}
1461
Stefan Richter850bb6f2010-07-16 22:25:14 +02001462static void outbound_phy_packet_callback(struct fw_packet *packet,
1463 struct fw_card *card, int status)
1464{
1465 struct outbound_phy_packet_event *e =
1466 container_of(packet, struct outbound_phy_packet_event, p);
1467
1468 switch (status) {
1469 /* expected: */
1470 case ACK_COMPLETE: e->phy_packet.rcode = RCODE_COMPLETE; break;
1471 /* should never happen with PHY packets: */
1472 case ACK_PENDING: e->phy_packet.rcode = RCODE_COMPLETE; break;
1473 case ACK_BUSY_X:
1474 case ACK_BUSY_A:
1475 case ACK_BUSY_B: e->phy_packet.rcode = RCODE_BUSY; break;
1476 case ACK_DATA_ERROR: e->phy_packet.rcode = RCODE_DATA_ERROR; break;
1477 case ACK_TYPE_ERROR: e->phy_packet.rcode = RCODE_TYPE_ERROR; break;
1478 /* stale generation; cancelled; on certain controllers: no ack */
1479 default: e->phy_packet.rcode = status; break;
1480 }
Stefan Richtercc550212010-07-18 13:00:50 +02001481 e->phy_packet.data[0] = packet->timestamp;
Stefan Richter850bb6f2010-07-16 22:25:14 +02001482
Stefan Richtercc550212010-07-18 13:00:50 +02001483 queue_event(e->client, &e->event, &e->phy_packet,
1484 sizeof(e->phy_packet) + e->phy_packet.length, NULL, 0);
Stefan Richter850bb6f2010-07-16 22:25:14 +02001485 client_put(e->client);
1486}
1487
1488static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg)
1489{
1490 struct fw_cdev_send_phy_packet *a = &arg->send_phy_packet;
1491 struct fw_card *card = client->device->card;
1492 struct outbound_phy_packet_event *e;
1493
1494 /* Access policy: Allow this ioctl only on local nodes' device files. */
1495 if (!client->device->is_local)
1496 return -ENOSYS;
1497
Stefan Richtercc550212010-07-18 13:00:50 +02001498 e = kzalloc(sizeof(*e) + 4, GFP_KERNEL);
Stefan Richter850bb6f2010-07-16 22:25:14 +02001499 if (e == NULL)
1500 return -ENOMEM;
1501
1502 client_get(client);
1503 e->client = client;
1504 e->p.speed = SCODE_100;
1505 e->p.generation = a->generation;
Clemens Ladisch5b06db12010-11-30 08:24:47 +01001506 e->p.header[0] = TCODE_LINK_INTERNAL << 4;
1507 e->p.header[1] = a->data[0];
1508 e->p.header[2] = a->data[1];
1509 e->p.header_length = 12;
Stefan Richter850bb6f2010-07-16 22:25:14 +02001510 e->p.callback = outbound_phy_packet_callback;
1511 e->phy_packet.closure = a->closure;
1512 e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_SENT;
Stefan Richtercc550212010-07-18 13:00:50 +02001513 if (is_ping_packet(a->data))
1514 e->phy_packet.length = 4;
Stefan Richter850bb6f2010-07-16 22:25:14 +02001515
1516 card->driver->send_request(card, &e->p);
1517
1518 return 0;
1519}
1520
Stefan Richterbf54e142010-07-16 22:25:51 +02001521static int ioctl_receive_phy_packets(struct client *client, union ioctl_arg *arg)
1522{
1523 struct fw_cdev_receive_phy_packets *a = &arg->receive_phy_packets;
1524 struct fw_card *card = client->device->card;
1525
1526 /* Access policy: Allow this ioctl only on local nodes' device files. */
1527 if (!client->device->is_local)
1528 return -ENOSYS;
1529
1530 spin_lock_irq(&card->lock);
1531
1532 list_move_tail(&client->phy_receiver_link, &card->phy_receiver_list);
1533 client->phy_receiver_closure = a->closure;
1534
1535 spin_unlock_irq(&card->lock);
1536
1537 return 0;
1538}
1539
1540void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p)
1541{
1542 struct client *client;
1543 struct inbound_phy_packet_event *e;
1544 unsigned long flags;
1545
1546 spin_lock_irqsave(&card->lock, flags);
1547
1548 list_for_each_entry(client, &card->phy_receiver_list, phy_receiver_link) {
1549 e = kmalloc(sizeof(*e) + 8, GFP_ATOMIC);
1550 if (e == NULL) {
1551 fw_notify("Out of memory when allocating event\n");
1552 break;
1553 }
1554 e->phy_packet.closure = client->phy_receiver_closure;
1555 e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_RECEIVED;
1556 e->phy_packet.rcode = RCODE_COMPLETE;
1557 e->phy_packet.length = 8;
1558 e->phy_packet.data[0] = p->header[1];
1559 e->phy_packet.data[1] = p->header[2];
1560 queue_event(client, &e->event,
1561 &e->phy_packet, sizeof(e->phy_packet) + 8, NULL, 0);
1562 }
1563
1564 spin_unlock_irqrestore(&card->lock, flags);
1565}
1566
Stefan Richter6e95dea2010-02-21 17:56:21 +01001567static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = {
Stefan Richterb9dc61cf2010-07-16 22:24:29 +02001568 [0x00] = ioctl_get_info,
1569 [0x01] = ioctl_send_request,
1570 [0x02] = ioctl_allocate,
1571 [0x03] = ioctl_deallocate,
1572 [0x04] = ioctl_send_response,
1573 [0x05] = ioctl_initiate_bus_reset,
1574 [0x06] = ioctl_add_descriptor,
1575 [0x07] = ioctl_remove_descriptor,
1576 [0x08] = ioctl_create_iso_context,
1577 [0x09] = ioctl_queue_iso,
1578 [0x0a] = ioctl_start_iso,
1579 [0x0b] = ioctl_stop_iso,
1580 [0x0c] = ioctl_get_cycle_timer,
1581 [0x0d] = ioctl_allocate_iso_resource,
1582 [0x0e] = ioctl_deallocate_iso_resource,
1583 [0x0f] = ioctl_allocate_iso_resource_once,
1584 [0x10] = ioctl_deallocate_iso_resource_once,
1585 [0x11] = ioctl_get_speed,
1586 [0x12] = ioctl_send_broadcast_request,
1587 [0x13] = ioctl_send_stream_packet,
1588 [0x14] = ioctl_get_cycle_timer2,
Stefan Richter850bb6f2010-07-16 22:25:14 +02001589 [0x15] = ioctl_send_phy_packet,
Stefan Richterbf54e142010-07-16 22:25:51 +02001590 [0x16] = ioctl_receive_phy_packets,
Stefan Richter872e3302010-07-29 18:19:22 +02001591 [0x17] = ioctl_set_iso_channels,
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001592};
1593
Stefan Richter53dca512008-12-14 21:47:04 +01001594static int dispatch_ioctl(struct client *client,
1595 unsigned int cmd, void __user *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001596{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001597 union ioctl_arg buffer;
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001598 int ret;
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001599
Stefan Richter64582292010-02-21 17:56:42 +01001600 if (fw_device_is_shutdown(client->device))
1601 return -ENODEV;
1602
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001603 if (_IOC_TYPE(cmd) != '#' ||
Stefan Richter9cac00b2010-04-07 08:30:50 +02001604 _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) ||
1605 _IOC_SIZE(cmd) > sizeof(buffer))
Stefan Richterd873d792011-07-09 16:42:26 +02001606 return -ENOTTY;
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001607
Stefan Richter9cac00b2010-04-07 08:30:50 +02001608 if (_IOC_DIR(cmd) == _IOC_READ)
1609 memset(&buffer, 0, _IOC_SIZE(cmd));
1610
1611 if (_IOC_DIR(cmd) & _IOC_WRITE)
1612 if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd)))
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001613 return -EFAULT;
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001614
Stefan Richter6e95dea2010-02-21 17:56:21 +01001615 ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer);
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001616 if (ret < 0)
1617 return ret;
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001618
Stefan Richter9cac00b2010-04-07 08:30:50 +02001619 if (_IOC_DIR(cmd) & _IOC_READ)
1620 if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd)))
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001621 return -EFAULT;
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001622
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001623 return ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001624}
1625
Stefan Richter53dca512008-12-14 21:47:04 +01001626static long fw_device_op_ioctl(struct file *file,
1627 unsigned int cmd, unsigned long arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001628{
Stefan Richter64582292010-02-21 17:56:42 +01001629 return dispatch_ioctl(file->private_data, cmd, (void __user *)arg);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001630}
1631
1632#ifdef CONFIG_COMPAT
Stefan Richter53dca512008-12-14 21:47:04 +01001633static long fw_device_op_compat_ioctl(struct file *file,
1634 unsigned int cmd, unsigned long arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001635{
Stefan Richter64582292010-02-21 17:56:42 +01001636 return dispatch_ioctl(file->private_data, cmd, compat_ptr(arg));
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001637}
1638#endif
1639
1640static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma)
1641{
1642 struct client *client = file->private_data;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001643 enum dma_data_direction direction;
1644 unsigned long size;
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001645 int page_count, ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001646
Jay Fenlason551f4cb2008-05-16 11:15:23 -04001647 if (fw_device_is_shutdown(client->device))
1648 return -ENODEV;
1649
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001650 /* FIXME: We could support multiple buffers, but we don't. */
1651 if (client->buffer.pages != NULL)
1652 return -EBUSY;
1653
1654 if (!(vma->vm_flags & VM_SHARED))
1655 return -EINVAL;
1656
1657 if (vma->vm_start & ~PAGE_MASK)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001658 return -EINVAL;
1659
1660 client->vm_start = vma->vm_start;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001661 size = vma->vm_end - vma->vm_start;
1662 page_count = size >> PAGE_SHIFT;
1663 if (size & ~PAGE_MASK)
1664 return -EINVAL;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001665
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001666 if (vma->vm_flags & VM_WRITE)
1667 direction = DMA_TO_DEVICE;
1668 else
1669 direction = DMA_FROM_DEVICE;
1670
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001671 ret = fw_iso_buffer_init(&client->buffer, client->device->card,
1672 page_count, direction);
1673 if (ret < 0)
1674 return ret;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001675
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001676 ret = fw_iso_buffer_map(&client->buffer, vma);
1677 if (ret < 0)
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001678 fw_iso_buffer_destroy(&client->buffer, client->device->card);
1679
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001680 return ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001681}
1682
Clemens Ladisch5a5e62d2011-01-10 17:28:39 +01001683static int is_outbound_transaction_resource(int id, void *p, void *data)
1684{
1685 struct client_resource *resource = p;
1686
1687 return resource->release == release_transaction;
1688}
1689
1690static int has_outbound_transactions(struct client *client)
1691{
1692 int ret;
1693
1694 spin_lock_irq(&client->lock);
1695 ret = idr_for_each(&client->resource_idr,
1696 is_outbound_transaction_resource, NULL);
1697 spin_unlock_irq(&client->lock);
1698
1699 return ret;
1700}
1701
Jay Fenlason45ee3192008-12-21 16:47:17 +01001702static int shutdown_resource(int id, void *p, void *data)
1703{
Stefan Richtere21fcf72009-10-08 00:41:38 +02001704 struct client_resource *resource = p;
Jay Fenlason45ee3192008-12-21 16:47:17 +01001705 struct client *client = data;
1706
Stefan Richtere21fcf72009-10-08 00:41:38 +02001707 resource->release(client, resource);
Stefan Richterfb443032009-01-04 16:23:29 +01001708 client_put(client);
Jay Fenlason45ee3192008-12-21 16:47:17 +01001709
1710 return 0;
1711}
1712
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001713static int fw_device_op_release(struct inode *inode, struct file *file)
1714{
1715 struct client *client = file->private_data;
Stefan Richtere21fcf72009-10-08 00:41:38 +02001716 struct event *event, *next_event;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001717
Stefan Richterbf54e142010-07-16 22:25:51 +02001718 spin_lock_irq(&client->device->card->lock);
1719 list_del(&client->phy_receiver_link);
1720 spin_unlock_irq(&client->device->card->lock);
1721
Stefan Richter97811e32008-12-14 19:19:23 +01001722 mutex_lock(&client->device->client_list_mutex);
1723 list_del(&client->link);
1724 mutex_unlock(&client->device->client_list_mutex);
1725
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001726 if (client->iso_context)
1727 fw_iso_context_destroy(client->iso_context);
1728
Stefan Richter36a755c2009-01-05 20:28:10 +01001729 if (client->buffer.pages)
1730 fw_iso_buffer_destroy(&client->buffer, client->device->card);
1731
Jay Fenlason45ee3192008-12-21 16:47:17 +01001732 /* Freeze client->resource_idr and client->event_list */
Stefan Richter3ba94982009-01-04 16:23:29 +01001733 spin_lock_irq(&client->lock);
Jay Fenlason45ee3192008-12-21 16:47:17 +01001734 client->in_shutdown = true;
Stefan Richter3ba94982009-01-04 16:23:29 +01001735 spin_unlock_irq(&client->lock);
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +02001736
Clemens Ladisch5a5e62d2011-01-10 17:28:39 +01001737 wait_event(client->tx_flush_wait, !has_outbound_transactions(client));
1738
Jay Fenlason45ee3192008-12-21 16:47:17 +01001739 idr_for_each(&client->resource_idr, shutdown_resource, client);
1740 idr_remove_all(&client->resource_idr);
1741 idr_destroy(&client->resource_idr);
Kristian Høgsberg28cf6a02007-03-07 12:12:50 -05001742
Stefan Richtere21fcf72009-10-08 00:41:38 +02001743 list_for_each_entry_safe(event, next_event, &client->event_list, link)
1744 kfree(event);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001745
Stefan Richterfb443032009-01-04 16:23:29 +01001746 client_put(client);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001747
1748 return 0;
1749}
1750
1751static unsigned int fw_device_op_poll(struct file *file, poll_table * pt)
1752{
1753 struct client *client = file->private_data;
Kristian Høgsberg2603bf22007-03-07 12:12:48 -05001754 unsigned int mask = 0;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001755
1756 poll_wait(file, &client->wait, pt);
1757
Kristian Høgsberg2603bf22007-03-07 12:12:48 -05001758 if (fw_device_is_shutdown(client->device))
1759 mask |= POLLHUP | POLLERR;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001760 if (!list_empty(&client->event_list))
Kristian Høgsberg2603bf22007-03-07 12:12:48 -05001761 mask |= POLLIN | POLLRDNORM;
1762
1763 return mask;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001764}
1765
Stefan Richter21ebcd12007-01-14 15:29:07 +01001766const struct file_operations fw_device_ops = {
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001767 .owner = THIS_MODULE,
Stefan Richter3ac26b22010-04-10 16:38:05 +01001768 .llseek = no_llseek,
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001769 .open = fw_device_op_open,
1770 .read = fw_device_op_read,
1771 .unlocked_ioctl = fw_device_op_ioctl,
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001772 .mmap = fw_device_op_mmap,
Stefan Richter3ac26b22010-04-10 16:38:05 +01001773 .release = fw_device_op_release,
1774 .poll = fw_device_op_poll,
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001775#ifdef CONFIG_COMPAT
Stefan Richter5af4e5e2007-01-21 20:45:32 +01001776 .compat_ioctl = fw_device_op_compat_ioctl,
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001777#endif
1778};