blob: f8d22872d75324e4dd0b2727308804f8a139eefe [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>
Stefan Richter0b6c4852012-04-09 20:51:18 +020025#include <linux/dma-mapping.h>
Stefan Richterbe5bbd62009-01-04 16:23:29 +010026#include <linux/errno.h>
Stefan Richter77c9a5d2009-06-05 16:26:18 +020027#include <linux/firewire.h>
Stefan Richterbe5bbd62009-01-04 16:23:29 +010028#include <linux/firewire-cdev.h>
29#include <linux/idr.h>
Stefan Richter4a9bde92010-02-20 22:24:43 +010030#include <linux/irqflags.h>
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +010031#include <linux/jiffies.h>
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050032#include <linux/kernel.h>
Stefan Richterfb443032009-01-04 16:23:29 +010033#include <linux/kref.h>
Stefan Richterbe5bbd62009-01-04 16:23:29 +010034#include <linux/mm.h>
35#include <linux/module.h>
Stefan Richterd67cfb92008-10-05 10:37:11 +020036#include <linux/mutex.h>
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050037#include <linux/poll.h>
Stefan Richterae2a97662010-07-29 09:31:56 +020038#include <linux/sched.h> /* required for linux/wait.h */
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090039#include <linux/slab.h>
Jay Fenlasoncf417e542008-10-03 11:19:09 -040040#include <linux/spinlock.h>
Stefan Richter281e2032010-01-24 16:45:03 +010041#include <linux/string.h>
Stefan Richterbe5bbd62009-01-04 16:23:29 +010042#include <linux/time.h>
Stefan Richtere034d242009-06-06 18:36:24 +020043#include <linux/uaccess.h>
Stefan Richterbe5bbd62009-01-04 16:23:29 +010044#include <linux/vmalloc.h>
45#include <linux/wait.h>
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +010046#include <linux/workqueue.h>
Stefan Richterbe5bbd62009-01-04 16:23:29 +010047
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 */
Clemens Ladisch18d62712012-03-18 19:05:29 +010054#define FW_CDEV_KERNEL_VERSION 5
Stefan Richter8e2b2b42010-07-23 13:05:39 +020055#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;
Stefan Richter0b6c4852012-04-09 20:51:18 +020074 bool buffer_is_mapped;
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -050075
Stefan Richterbf54e142010-07-16 22:25:51 +020076 struct list_head phy_receiver_link;
77 u64 phy_receiver_closure;
78
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -050079 struct list_head link;
Stefan Richterfb443032009-01-04 16:23:29 +010080 struct kref kref;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050081};
82
Stefan Richterfb443032009-01-04 16:23:29 +010083static inline void client_get(struct client *client)
84{
85 kref_get(&client->kref);
86}
87
88static void client_release(struct kref *kref)
89{
90 struct client *client = container_of(kref, struct client, kref);
91
92 fw_device_put(client->device);
93 kfree(client);
94}
95
96static void client_put(struct client *client)
97{
98 kref_put(&client->kref, client_release);
99}
100
Stefan Richter97c18b72009-01-04 16:23:29 +0100101struct client_resource;
102typedef void (*client_resource_release_fn_t)(struct client *,
103 struct client_resource *);
104struct client_resource {
105 client_resource_release_fn_t release;
106 int handle;
107};
108
109struct address_handler_resource {
110 struct client_resource resource;
111 struct fw_address_handler handler;
112 __u64 closure;
113 struct client *client;
114};
115
116struct outbound_transaction_resource {
117 struct client_resource resource;
118 struct fw_transaction transaction;
119};
120
121struct inbound_transaction_resource {
122 struct client_resource resource;
Jay Fenlason08bd34c2010-05-18 14:02:45 -0400123 struct fw_card *card;
Stefan Richter97c18b72009-01-04 16:23:29 +0100124 struct fw_request *request;
125 void *data;
126 size_t length;
127};
128
129struct descriptor_resource {
130 struct client_resource resource;
131 struct fw_descriptor descriptor;
132 u32 data[0];
133};
134
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100135struct iso_resource {
136 struct client_resource resource;
137 struct client *client;
138 /* Schedule work and access todo only with client->lock held. */
139 struct delayed_work work;
Stefan Richter1ec3c022009-01-04 16:23:29 +0100140 enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC,
141 ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100142 int generation;
143 u64 channels;
144 s32 bandwidth;
145 struct iso_resource_event *e_alloc, *e_dealloc;
146};
147
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100148static void release_iso_resource(struct client *, struct client_resource *);
149
Stefan Richter9fb551b2009-10-08 00:41:10 +0200150static void schedule_iso_resource(struct iso_resource *r, unsigned long delay)
151{
152 client_get(r->client);
Stefan Richter105e53f2011-05-01 20:50:31 +0200153 if (!queue_delayed_work(fw_workqueue, &r->work, delay))
Stefan Richter9fb551b2009-10-08 00:41:10 +0200154 client_put(r->client);
155}
156
157static void schedule_if_iso_resource(struct client_resource *resource)
158{
159 if (resource->release == release_iso_resource)
160 schedule_iso_resource(container_of(resource,
161 struct iso_resource, resource), 0);
162}
163
Stefan Richter97c18b72009-01-04 16:23:29 +0100164/*
165 * dequeue_event() just kfree()'s the event, so the event has to be
166 * the first field in a struct XYZ_event.
167 */
168struct event {
169 struct { void *data; size_t size; } v[2];
170 struct list_head link;
171};
172
173struct bus_reset_event {
174 struct event event;
175 struct fw_cdev_event_bus_reset reset;
176};
177
178struct outbound_transaction_event {
179 struct event event;
180 struct client *client;
181 struct outbound_transaction_resource r;
182 struct fw_cdev_event_response response;
183};
184
185struct inbound_transaction_event {
186 struct event event;
Stefan Richtere2055972010-06-20 22:53:55 +0200187 union {
188 struct fw_cdev_event_request request;
189 struct fw_cdev_event_request2 request2;
190 } req;
Stefan Richter97c18b72009-01-04 16:23:29 +0100191};
192
193struct iso_interrupt_event {
194 struct event event;
195 struct fw_cdev_event_iso_interrupt interrupt;
196};
197
Stefan Richter872e3302010-07-29 18:19:22 +0200198struct iso_interrupt_mc_event {
199 struct event event;
200 struct fw_cdev_event_iso_interrupt_mc interrupt;
201};
202
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100203struct iso_resource_event {
204 struct event event;
Stefan Richtere21fcf72009-10-08 00:41:38 +0200205 struct fw_cdev_event_iso_resource iso_resource;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100206};
207
Stefan Richter850bb6f2010-07-16 22:25:14 +0200208struct outbound_phy_packet_event {
209 struct event event;
210 struct client *client;
211 struct fw_packet p;
212 struct fw_cdev_event_phy_packet phy_packet;
213};
214
Stefan Richterbf54e142010-07-16 22:25:51 +0200215struct inbound_phy_packet_event {
216 struct event event;
217 struct fw_cdev_event_phy_packet phy_packet;
218};
219
Stefan Richter9c1176b2011-08-11 00:06:04 +0200220#ifdef CONFIG_COMPAT
221static void __user *u64_to_uptr(u64 value)
222{
223 if (is_compat_task())
224 return compat_ptr(value);
225 else
226 return (void __user *)(unsigned long)value;
227}
228
229static u64 uptr_to_u64(void __user *ptr)
230{
231 if (is_compat_task())
232 return ptr_to_compat(ptr);
233 else
234 return (u64)(unsigned long)ptr;
235}
236#else
237static inline void __user *u64_to_uptr(u64 value)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500238{
239 return (void __user *)(unsigned long)value;
240}
241
Stefan Richter9c1176b2011-08-11 00:06:04 +0200242static inline u64 uptr_to_u64(void __user *ptr)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500243{
Stefan Richter9c1176b2011-08-11 00:06:04 +0200244 return (u64)(unsigned long)ptr;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500245}
Stefan Richter9c1176b2011-08-11 00:06:04 +0200246#endif /* CONFIG_COMPAT */
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500247
248static int fw_device_op_open(struct inode *inode, struct file *file)
249{
250 struct fw_device *device;
251 struct client *client;
252
Stefan Richter96b19062008-02-02 15:01:09 +0100253 device = fw_device_get_by_devt(inode->i_rdev);
Kristian Høgsberga3aca3d2007-03-07 12:12:44 -0500254 if (device == NULL)
255 return -ENODEV;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500256
Jay Fenlason551f4cb2008-05-16 11:15:23 -0400257 if (fw_device_is_shutdown(device)) {
258 fw_device_put(device);
259 return -ENODEV;
260 }
261
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400262 client = kzalloc(sizeof(*client), GFP_KERNEL);
Stefan Richter96b19062008-02-02 15:01:09 +0100263 if (client == NULL) {
264 fw_device_put(device);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500265 return -ENOMEM;
Stefan Richter96b19062008-02-02 15:01:09 +0100266 }
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500267
Stefan Richter96b19062008-02-02 15:01:09 +0100268 client->device = device;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500269 spin_lock_init(&client->lock);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100270 idr_init(&client->resource_idr);
271 INIT_LIST_HEAD(&client->event_list);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500272 init_waitqueue_head(&client->wait);
Clemens Ladisch5a5e62d2011-01-10 17:28:39 +0100273 init_waitqueue_head(&client->tx_flush_wait);
Stefan Richterbf54e142010-07-16 22:25:51 +0200274 INIT_LIST_HEAD(&client->phy_receiver_link);
Stefan Richter93b37902011-07-09 16:43:22 +0200275 INIT_LIST_HEAD(&client->link);
Stefan Richterfb443032009-01-04 16:23:29 +0100276 kref_init(&client->kref);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500277
278 file->private_data = client;
279
Stefan Richter3ac26b22010-04-10 16:38:05 +0100280 return nonseekable_open(inode, file);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500281}
282
283static void queue_event(struct client *client, struct event *event,
284 void *data0, size_t size0, void *data1, size_t size1)
285{
286 unsigned long flags;
287
288 event->v[0].data = data0;
289 event->v[0].size = size0;
290 event->v[1].data = data1;
291 event->v[1].size = size1;
292
293 spin_lock_irqsave(&client->lock, flags);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100294 if (client->in_shutdown)
295 kfree(event);
296 else
297 list_add_tail(&event->link, &client->event_list);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500298 spin_unlock_irqrestore(&client->lock, flags);
Jay Fenlason83431cb2007-10-08 17:00:29 -0400299
300 wake_up_interruptible(&client->wait);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500301}
302
Stefan Richter53dca512008-12-14 21:47:04 +0100303static int dequeue_event(struct client *client,
304 char __user *buffer, size_t count)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500305{
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500306 struct event *event;
307 size_t size, total;
Stefan Richter2dbd7d72008-12-14 21:45:45 +0100308 int i, ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500309
Stefan Richter2dbd7d72008-12-14 21:45:45 +0100310 ret = wait_event_interruptible(client->wait,
311 !list_empty(&client->event_list) ||
312 fw_device_is_shutdown(client->device));
313 if (ret < 0)
314 return ret;
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500315
316 if (list_empty(&client->event_list) &&
317 fw_device_is_shutdown(client->device))
318 return -ENODEV;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500319
Stefan Richter3ba94982009-01-04 16:23:29 +0100320 spin_lock_irq(&client->lock);
Stefan Richtera459b8a2008-12-21 16:49:57 +0100321 event = list_first_entry(&client->event_list, struct event, link);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500322 list_del(&event->link);
Stefan Richter3ba94982009-01-04 16:23:29 +0100323 spin_unlock_irq(&client->lock);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500324
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500325 total = 0;
326 for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) {
327 size = min(event->v[i].size, count - total);
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500328 if (copy_to_user(buffer + total, event->v[i].data, size)) {
Stefan Richter2dbd7d72008-12-14 21:45:45 +0100329 ret = -EFAULT;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500330 goto out;
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500331 }
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500332 total += size;
333 }
Stefan Richter2dbd7d72008-12-14 21:45:45 +0100334 ret = total;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500335
336 out:
337 kfree(event);
338
Stefan Richter2dbd7d72008-12-14 21:45:45 +0100339 return ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500340}
341
Stefan Richter53dca512008-12-14 21:47:04 +0100342static ssize_t fw_device_op_read(struct file *file, char __user *buffer,
343 size_t count, loff_t *offset)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500344{
345 struct client *client = file->private_data;
346
347 return dequeue_event(client, buffer, count);
348}
349
Stefan Richter53dca512008-12-14 21:47:04 +0100350static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event,
351 struct client *client)
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500352{
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -0400353 struct fw_card *card = client->device->card;
Jay Fenlasoncf417e542008-10-03 11:19:09 -0400354
Stefan Richter3ba94982009-01-04 16:23:29 +0100355 spin_lock_irq(&card->lock);
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500356
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -0400357 event->closure = client->bus_reset_closure;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500358 event->type = FW_CDEV_EVENT_BUS_RESET;
Stefan Richtercf5a56a2008-01-24 01:53:51 +0100359 event->generation = client->device->generation;
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -0400360 event->node_id = client->device->node_id;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500361 event->local_node_id = card->local_node->node_id;
Stefan Richter250b2b62010-06-21 23:24:35 +0200362 event->bm_node_id = card->bm_node_id;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500363 event->irm_node_id = card->irm_node->node_id;
364 event->root_node_id = card->root_node->node_id;
Jay Fenlasoncf417e542008-10-03 11:19:09 -0400365
Stefan Richter3ba94982009-01-04 16:23:29 +0100366 spin_unlock_irq(&card->lock);
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500367}
368
Stefan Richter53dca512008-12-14 21:47:04 +0100369static void for_each_client(struct fw_device *device,
370 void (*callback)(struct client *client))
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500371{
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500372 struct client *c;
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500373
Stefan Richterd67cfb92008-10-05 10:37:11 +0200374 mutex_lock(&device->client_list_mutex);
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500375 list_for_each_entry(c, &device->client_list, link)
376 callback(c);
Stefan Richterd67cfb92008-10-05 10:37:11 +0200377 mutex_unlock(&device->client_list_mutex);
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500378}
379
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100380static int schedule_reallocations(int id, void *p, void *data)
381{
Stefan Richter9fb551b2009-10-08 00:41:10 +0200382 schedule_if_iso_resource(p);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100383
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100384 return 0;
385}
386
Stefan Richter53dca512008-12-14 21:47:04 +0100387static void queue_bus_reset_event(struct client *client)
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500388{
Stefan Richter97c18b72009-01-04 16:23:29 +0100389 struct bus_reset_event *e;
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500390
Stefan Richter97c18b72009-01-04 16:23:29 +0100391 e = kzalloc(sizeof(*e), GFP_KERNEL);
392 if (e == NULL) {
Stefan Richter26b49502012-02-18 22:03:14 +0100393 fw_notice(client->device->card, "out of memory when allocating event\n");
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500394 return;
395 }
396
Stefan Richter97c18b72009-01-04 16:23:29 +0100397 fill_bus_reset_event(&e->reset, client);
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500398
Stefan Richter97c18b72009-01-04 16:23:29 +0100399 queue_event(client, &e->event,
400 &e->reset, sizeof(e->reset), NULL, 0);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100401
402 spin_lock_irq(&client->lock);
403 idr_for_each(&client->resource_idr, schedule_reallocations, client);
404 spin_unlock_irq(&client->lock);
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500405}
406
407void fw_device_cdev_update(struct fw_device *device)
408{
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500409 for_each_client(device, queue_bus_reset_event);
410}
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500411
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500412static void wake_up_client(struct client *client)
413{
414 wake_up_interruptible(&client->wait);
415}
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500416
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500417void fw_device_cdev_remove(struct fw_device *device)
418{
419 for_each_client(device, wake_up_client);
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500420}
421
Stefan Richter6e95dea2010-02-21 17:56:21 +0100422union ioctl_arg {
423 struct fw_cdev_get_info get_info;
424 struct fw_cdev_send_request send_request;
425 struct fw_cdev_allocate allocate;
426 struct fw_cdev_deallocate deallocate;
427 struct fw_cdev_send_response send_response;
428 struct fw_cdev_initiate_bus_reset initiate_bus_reset;
429 struct fw_cdev_add_descriptor add_descriptor;
430 struct fw_cdev_remove_descriptor remove_descriptor;
431 struct fw_cdev_create_iso_context create_iso_context;
432 struct fw_cdev_queue_iso queue_iso;
433 struct fw_cdev_start_iso start_iso;
434 struct fw_cdev_stop_iso stop_iso;
435 struct fw_cdev_get_cycle_timer get_cycle_timer;
436 struct fw_cdev_allocate_iso_resource allocate_iso_resource;
437 struct fw_cdev_send_stream_packet send_stream_packet;
438 struct fw_cdev_get_cycle_timer2 get_cycle_timer2;
Stefan Richter850bb6f2010-07-16 22:25:14 +0200439 struct fw_cdev_send_phy_packet send_phy_packet;
Stefan Richterbf54e142010-07-16 22:25:51 +0200440 struct fw_cdev_receive_phy_packets receive_phy_packets;
Stefan Richter872e3302010-07-29 18:19:22 +0200441 struct fw_cdev_set_iso_channels set_iso_channels;
Clemens Ladischd1bbd202012-03-18 19:06:39 +0100442 struct fw_cdev_flush_iso flush_iso;
Stefan Richter6e95dea2010-02-21 17:56:21 +0100443};
444
445static int ioctl_get_info(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500446{
Stefan Richter6e95dea2010-02-21 17:56:21 +0100447 struct fw_cdev_get_info *a = &arg->get_info;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500448 struct fw_cdev_event_bus_reset bus_reset;
Stefan Richterc9755e12008-03-24 20:54:28 +0100449 unsigned long ret = 0;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500450
Stefan Richter6e95dea2010-02-21 17:56:21 +0100451 client->version = a->version;
Stefan Richter604f4512010-06-20 22:52:55 +0200452 a->version = FW_CDEV_KERNEL_VERSION;
Stefan Richter6e95dea2010-02-21 17:56:21 +0100453 a->card = client->device->card->index;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500454
Stefan Richterc9755e12008-03-24 20:54:28 +0100455 down_read(&fw_device_rwsem);
456
Stefan Richter6e95dea2010-02-21 17:56:21 +0100457 if (a->rom != 0) {
458 size_t want = a->rom_length;
Stefan Richterd84702a2007-03-20 19:42:15 +0100459 size_t have = client->device->config_rom_length * 4;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500460
Stefan Richter6e95dea2010-02-21 17:56:21 +0100461 ret = copy_to_user(u64_to_uptr(a->rom),
462 client->device->config_rom, min(want, have));
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500463 }
Stefan Richter6e95dea2010-02-21 17:56:21 +0100464 a->rom_length = client->device->config_rom_length * 4;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500465
Stefan Richterc9755e12008-03-24 20:54:28 +0100466 up_read(&fw_device_rwsem);
467
468 if (ret != 0)
469 return -EFAULT;
470
Stefan Richter93b37902011-07-09 16:43:22 +0200471 mutex_lock(&client->device->client_list_mutex);
472
Stefan Richter6e95dea2010-02-21 17:56:21 +0100473 client->bus_reset_closure = a->bus_reset_closure;
474 if (a->bus_reset != 0) {
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -0400475 fill_bus_reset_event(&bus_reset, client);
Stefan Richter790198f2012-10-06 14:12:56 +0200476 /* unaligned size of bus_reset is 36 bytes */
477 ret = copy_to_user(u64_to_uptr(a->bus_reset), &bus_reset, 36);
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500478 }
Stefan Richter93b37902011-07-09 16:43:22 +0200479 if (ret == 0 && list_empty(&client->link))
480 list_add_tail(&client->link, &client->device->client_list);
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500481
Stefan Richter93b37902011-07-09 16:43:22 +0200482 mutex_unlock(&client->device->client_list_mutex);
483
484 return ret ? -EFAULT : 0;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500485}
486
Stefan Richter53dca512008-12-14 21:47:04 +0100487static int add_client_resource(struct client *client,
488 struct client_resource *resource, gfp_t gfp_mask)
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400489{
490 unsigned long flags;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100491 int ret;
492
493 retry:
494 if (idr_pre_get(&client->resource_idr, gfp_mask) == 0)
495 return -ENOMEM;
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400496
497 spin_lock_irqsave(&client->lock, flags);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100498 if (client->in_shutdown)
499 ret = -ECANCELED;
500 else
501 ret = idr_get_new(&client->resource_idr, resource,
502 &resource->handle);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100503 if (ret >= 0) {
Stefan Richterfb443032009-01-04 16:23:29 +0100504 client_get(client);
Stefan Richter9fb551b2009-10-08 00:41:10 +0200505 schedule_if_iso_resource(resource);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100506 }
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400507 spin_unlock_irqrestore(&client->lock, flags);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100508
509 if (ret == -EAGAIN)
510 goto retry;
511
512 return ret < 0 ? ret : 0;
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400513}
514
Stefan Richter53dca512008-12-14 21:47:04 +0100515static int release_client_resource(struct client *client, u32 handle,
516 client_resource_release_fn_t release,
Stefan Richtere21fcf72009-10-08 00:41:38 +0200517 struct client_resource **return_resource)
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400518{
Stefan Richtere21fcf72009-10-08 00:41:38 +0200519 struct client_resource *resource;
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400520
Stefan Richter3ba94982009-01-04 16:23:29 +0100521 spin_lock_irq(&client->lock);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100522 if (client->in_shutdown)
Stefan Richtere21fcf72009-10-08 00:41:38 +0200523 resource = NULL;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100524 else
Stefan Richtere21fcf72009-10-08 00:41:38 +0200525 resource = idr_find(&client->resource_idr, handle);
526 if (resource && resource->release == release)
Jay Fenlason45ee3192008-12-21 16:47:17 +0100527 idr_remove(&client->resource_idr, handle);
Stefan Richter3ba94982009-01-04 16:23:29 +0100528 spin_unlock_irq(&client->lock);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400529
Stefan Richtere21fcf72009-10-08 00:41:38 +0200530 if (!(resource && resource->release == release))
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400531 return -EINVAL;
532
Stefan Richtere21fcf72009-10-08 00:41:38 +0200533 if (return_resource)
534 *return_resource = resource;
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400535 else
Stefan Richtere21fcf72009-10-08 00:41:38 +0200536 resource->release(client, resource);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400537
Stefan Richterfb443032009-01-04 16:23:29 +0100538 client_put(client);
539
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400540 return 0;
541}
542
Stefan Richter53dca512008-12-14 21:47:04 +0100543static void release_transaction(struct client *client,
544 struct client_resource *resource)
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400545{
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400546}
547
Stefan Richter53dca512008-12-14 21:47:04 +0100548static void complete_transaction(struct fw_card *card, int rcode,
549 void *payload, size_t length, void *data)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500550{
Stefan Richter97c18b72009-01-04 16:23:29 +0100551 struct outbound_transaction_event *e = data;
552 struct fw_cdev_event_response *rsp = &e->response;
553 struct client *client = e->client;
Kristian Høgsberg28cf6a02007-03-07 12:12:50 -0500554 unsigned long flags;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500555
Stefan Richter97c18b72009-01-04 16:23:29 +0100556 if (length < rsp->length)
557 rsp->length = length;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500558 if (rcode == RCODE_COMPLETE)
Stefan Richter97c18b72009-01-04 16:23:29 +0100559 memcpy(rsp->data, payload, rsp->length);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500560
Kristian Høgsberg28cf6a02007-03-07 12:12:50 -0500561 spin_lock_irqsave(&client->lock, flags);
Clemens Ladisch5a5e62d2011-01-10 17:28:39 +0100562 idr_remove(&client->resource_idr, e->r.resource.handle);
563 if (client->in_shutdown)
564 wake_up(&client->tx_flush_wait);
Kristian Høgsberg28cf6a02007-03-07 12:12:50 -0500565 spin_unlock_irqrestore(&client->lock, flags);
566
Stefan Richter97c18b72009-01-04 16:23:29 +0100567 rsp->type = FW_CDEV_EVENT_RESPONSE;
568 rsp->rcode = rcode;
David Moore8401d922008-07-29 23:46:25 -0700569
570 /*
Stefan Richter97c18b72009-01-04 16:23:29 +0100571 * In the case that sizeof(*rsp) doesn't align with the position of the
David Moore8401d922008-07-29 23:46:25 -0700572 * data, and the read is short, preserve an extra copy of the data
573 * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless
574 * for short reads and some apps depended on it, this is both safe
575 * and prudent for compatibility.
576 */
Stefan Richter97c18b72009-01-04 16:23:29 +0100577 if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data))
578 queue_event(client, &e->event, rsp, sizeof(*rsp),
579 rsp->data, rsp->length);
David Moore8401d922008-07-29 23:46:25 -0700580 else
Stefan Richter97c18b72009-01-04 16:23:29 +0100581 queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length,
David Moore8401d922008-07-29 23:46:25 -0700582 NULL, 0);
Stefan Richterfb443032009-01-04 16:23:29 +0100583
Clemens Ladisch5a5e62d2011-01-10 17:28:39 +0100584 /* Drop the idr's reference */
585 client_put(client);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500586}
587
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +0100588static int init_request(struct client *client,
589 struct fw_cdev_send_request *request,
590 int destination_id, int speed)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500591{
Stefan Richter97c18b72009-01-04 16:23:29 +0100592 struct outbound_transaction_event *e;
Stefan Richter1f3125a2008-12-05 22:44:42 +0100593 int ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500594
Stefan Richter18e9b10f2009-03-10 21:02:21 +0100595 if (request->tcode != TCODE_STREAM_DATA &&
596 (request->length > 4096 || request->length > 512 << speed))
Stefan Richter5d3fd692009-01-04 16:23:29 +0100597 return -EIO;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500598
Clemens Ladischa8e93f32010-07-07 14:37:30 +0200599 if (request->tcode == TCODE_WRITE_QUADLET_REQUEST &&
600 request->length < 4)
601 return -EINVAL;
602
Stefan Richter97c18b72009-01-04 16:23:29 +0100603 e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL);
604 if (e == NULL)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500605 return -ENOMEM;
606
Stefan Richter97c18b72009-01-04 16:23:29 +0100607 e->client = client;
608 e->response.length = request->length;
609 e->response.closure = request->closure;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500610
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400611 if (request->data &&
Stefan Richter97c18b72009-01-04 16:23:29 +0100612 copy_from_user(e->response.data,
Kristian Høgsberg4f259222007-04-30 15:03:13 -0400613 u64_to_uptr(request->data), request->length)) {
Stefan Richter1f3125a2008-12-05 22:44:42 +0100614 ret = -EFAULT;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100615 goto failed;
Stefan Richter1f3125a2008-12-05 22:44:42 +0100616 }
617
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +0100618 e->r.resource.release = release_transaction;
619 ret = add_client_resource(client, &e->r.resource, GFP_KERNEL);
620 if (ret < 0)
621 goto failed;
622
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +0100623 fw_send_request(client->device->card, &e->r.transaction,
Stefan Richter664d8012009-03-10 21:01:54 +0100624 request->tcode, destination_id, request->generation,
625 speed, request->offset, e->response.data,
626 request->length, complete_transaction, e);
627 return 0;
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +0100628
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +0100629 failed:
630 kfree(e);
631
632 return ret;
633}
634
Stefan Richter6e95dea2010-02-21 17:56:21 +0100635static int ioctl_send_request(struct client *client, union ioctl_arg *arg)
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +0100636{
Stefan Richter6e95dea2010-02-21 17:56:21 +0100637 switch (arg->send_request.tcode) {
Stefan Richter1f3125a2008-12-05 22:44:42 +0100638 case TCODE_WRITE_QUADLET_REQUEST:
639 case TCODE_WRITE_BLOCK_REQUEST:
640 case TCODE_READ_QUADLET_REQUEST:
641 case TCODE_READ_BLOCK_REQUEST:
642 case TCODE_LOCK_MASK_SWAP:
643 case TCODE_LOCK_COMPARE_SWAP:
644 case TCODE_LOCK_FETCH_ADD:
645 case TCODE_LOCK_LITTLE_ADD:
646 case TCODE_LOCK_BOUNDED_ADD:
647 case TCODE_LOCK_WRAP_ADD:
648 case TCODE_LOCK_VENDOR_DEPENDENT:
649 break;
650 default:
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +0100651 return -EINVAL;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500652 }
653
Stefan Richter6e95dea2010-02-21 17:56:21 +0100654 return init_request(client, &arg->send_request, client->device->node_id,
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +0100655 client->device->max_speed);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500656}
657
Stefan Richter281e2032010-01-24 16:45:03 +0100658static inline bool is_fcp_request(struct fw_request *request)
659{
660 return request == NULL;
661}
662
Stefan Richter53dca512008-12-14 21:47:04 +0100663static void release_request(struct client *client,
664 struct client_resource *resource)
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400665{
Stefan Richter97c18b72009-01-04 16:23:29 +0100666 struct inbound_transaction_resource *r = container_of(resource,
667 struct inbound_transaction_resource, resource);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400668
Stefan Richter281e2032010-01-24 16:45:03 +0100669 if (is_fcp_request(r->request))
670 kfree(r->data);
671 else
Jay Fenlason08bd34c2010-05-18 14:02:45 -0400672 fw_send_response(r->card, r->request, RCODE_CONFLICT_ERROR);
Stefan Richter0244f572010-06-20 22:52:27 +0200673
674 fw_card_put(r->card);
Stefan Richter97c18b72009-01-04 16:23:29 +0100675 kfree(r);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400676}
677
Stefan Richter97c18b72009-01-04 16:23:29 +0100678static void handle_request(struct fw_card *card, struct fw_request *request,
Stefan Richter53dca512008-12-14 21:47:04 +0100679 int tcode, int destination, int source,
Stefan Richter33e553f2010-06-20 22:50:35 +0200680 int generation, unsigned long long offset,
Stefan Richter53dca512008-12-14 21:47:04 +0100681 void *payload, size_t length, void *callback_data)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500682{
Stefan Richter97c18b72009-01-04 16:23:29 +0100683 struct address_handler_resource *handler = callback_data;
684 struct inbound_transaction_resource *r;
685 struct inbound_transaction_event *e;
Stefan Richtere2055972010-06-20 22:53:55 +0200686 size_t event_size0;
Stefan Richter281e2032010-01-24 16:45:03 +0100687 void *fcp_frame = NULL;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100688 int ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500689
Stefan Richter0244f572010-06-20 22:52:27 +0200690 /* card may be different from handler->client->device->card */
691 fw_card_get(card);
692
Stefan Richter97c18b72009-01-04 16:23:29 +0100693 r = kmalloc(sizeof(*r), GFP_ATOMIC);
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400694 e = kmalloc(sizeof(*e), GFP_ATOMIC);
Stefan Richterbf54e142010-07-16 22:25:51 +0200695 if (r == NULL || e == NULL) {
Stefan Richter26b49502012-02-18 22:03:14 +0100696 fw_notice(card, "out of memory when allocating event\n");
Jay Fenlason45ee3192008-12-21 16:47:17 +0100697 goto failed;
Stefan Richterbf54e142010-07-16 22:25:51 +0200698 }
Jay Fenlason08bd34c2010-05-18 14:02:45 -0400699 r->card = card;
Stefan Richter97c18b72009-01-04 16:23:29 +0100700 r->request = request;
701 r->data = payload;
702 r->length = length;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500703
Stefan Richter281e2032010-01-24 16:45:03 +0100704 if (is_fcp_request(request)) {
705 /*
706 * FIXME: Let core-transaction.c manage a
707 * single reference-counted copy?
708 */
709 fcp_frame = kmemdup(payload, length, GFP_ATOMIC);
710 if (fcp_frame == NULL)
711 goto failed;
712
713 r->data = fcp_frame;
714 }
715
Stefan Richter97c18b72009-01-04 16:23:29 +0100716 r->resource.release = release_request;
717 ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100718 if (ret < 0)
719 goto failed;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500720
Stefan Richtere2055972010-06-20 22:53:55 +0200721 if (handler->client->version < FW_CDEV_VERSION_EVENT_REQUEST2) {
722 struct fw_cdev_event_request *req = &e->req.request;
723
724 if (tcode & 0x10)
725 tcode = TCODE_LOCK_REQUEST;
726
727 req->type = FW_CDEV_EVENT_REQUEST;
728 req->tcode = tcode;
729 req->offset = offset;
730 req->length = length;
731 req->handle = r->resource.handle;
732 req->closure = handler->closure;
733 event_size0 = sizeof(*req);
734 } else {
735 struct fw_cdev_event_request2 *req = &e->req.request2;
736
737 req->type = FW_CDEV_EVENT_REQUEST2;
738 req->tcode = tcode;
739 req->offset = offset;
740 req->source_node_id = source;
741 req->destination_node_id = destination;
742 req->card = card->index;
743 req->generation = generation;
744 req->length = length;
745 req->handle = r->resource.handle;
746 req->closure = handler->closure;
747 event_size0 = sizeof(*req);
748 }
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500749
Stefan Richter97c18b72009-01-04 16:23:29 +0100750 queue_event(handler->client, &e->event,
Stefan Richtere2055972010-06-20 22:53:55 +0200751 &e->req, event_size0, r->data, length);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100752 return;
753
754 failed:
Stefan Richter97c18b72009-01-04 16:23:29 +0100755 kfree(r);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100756 kfree(e);
Stefan Richter281e2032010-01-24 16:45:03 +0100757 kfree(fcp_frame);
758
759 if (!is_fcp_request(request))
Clemens Ladischdb5d2472009-12-24 12:05:58 +0100760 fw_send_response(card, request, RCODE_CONFLICT_ERROR);
Stefan Richter0244f572010-06-20 22:52:27 +0200761
762 fw_card_put(card);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500763}
764
Stefan Richter53dca512008-12-14 21:47:04 +0100765static void release_address_handler(struct client *client,
766 struct client_resource *resource)
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400767{
Stefan Richter97c18b72009-01-04 16:23:29 +0100768 struct address_handler_resource *r =
769 container_of(resource, struct address_handler_resource, resource);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400770
Stefan Richter97c18b72009-01-04 16:23:29 +0100771 fw_core_remove_address_handler(&r->handler);
772 kfree(r);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400773}
774
Stefan Richter6e95dea2010-02-21 17:56:21 +0100775static int ioctl_allocate(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500776{
Stefan Richter6e95dea2010-02-21 17:56:21 +0100777 struct fw_cdev_allocate *a = &arg->allocate;
Stefan Richter97c18b72009-01-04 16:23:29 +0100778 struct address_handler_resource *r;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500779 struct fw_address_region region;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100780 int ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500781
Stefan Richter97c18b72009-01-04 16:23:29 +0100782 r = kmalloc(sizeof(*r), GFP_KERNEL);
783 if (r == NULL)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500784 return -ENOMEM;
785
Stefan Richter6e95dea2010-02-21 17:56:21 +0100786 region.start = a->offset;
Stefan Richter8e2b2b42010-07-23 13:05:39 +0200787 if (client->version < FW_CDEV_VERSION_ALLOCATE_REGION_END)
788 region.end = a->offset + a->length;
789 else
790 region.end = a->region_end;
791
Stefan Richter6e95dea2010-02-21 17:56:21 +0100792 r->handler.length = a->length;
Stefan Richter97c18b72009-01-04 16:23:29 +0100793 r->handler.address_callback = handle_request;
Stefan Richter6e95dea2010-02-21 17:56:21 +0100794 r->handler.callback_data = r;
795 r->closure = a->closure;
796 r->client = client;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500797
Stefan Richter97c18b72009-01-04 16:23:29 +0100798 ret = fw_core_add_address_handler(&r->handler, &region);
Stefan Richter3e0b5f02008-12-14 19:21:01 +0100799 if (ret < 0) {
Stefan Richter97c18b72009-01-04 16:23:29 +0100800 kfree(r);
Stefan Richter3e0b5f02008-12-14 19:21:01 +0100801 return ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500802 }
Stefan Richter8e2b2b42010-07-23 13:05:39 +0200803 a->offset = r->handler.offset;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500804
Stefan Richter97c18b72009-01-04 16:23:29 +0100805 r->resource.release = release_address_handler;
806 ret = add_client_resource(client, &r->resource, GFP_KERNEL);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100807 if (ret < 0) {
Stefan Richter97c18b72009-01-04 16:23:29 +0100808 release_address_handler(client, &r->resource);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100809 return ret;
810 }
Stefan Richter6e95dea2010-02-21 17:56:21 +0100811 a->handle = r->resource.handle;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500812
813 return 0;
814}
815
Stefan Richter6e95dea2010-02-21 17:56:21 +0100816static int ioctl_deallocate(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg9472316b2007-03-14 17:34:55 -0400817{
Stefan Richter6e95dea2010-02-21 17:56:21 +0100818 return release_client_resource(client, arg->deallocate.handle,
Jay Fenlason45ee3192008-12-21 16:47:17 +0100819 release_address_handler, NULL);
Kristian Høgsberg9472316b2007-03-14 17:34:55 -0400820}
821
Stefan Richter6e95dea2010-02-21 17:56:21 +0100822static int ioctl_send_response(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500823{
Stefan Richter6e95dea2010-02-21 17:56:21 +0100824 struct fw_cdev_send_response *a = &arg->send_response;
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400825 struct client_resource *resource;
Stefan Richter97c18b72009-01-04 16:23:29 +0100826 struct inbound_transaction_resource *r;
Stefan Richter7e44c0b2009-10-08 00:39:56 +0200827 int ret = 0;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500828
Stefan Richter6e95dea2010-02-21 17:56:21 +0100829 if (release_client_resource(client, a->handle,
Jay Fenlason45ee3192008-12-21 16:47:17 +0100830 release_request, &resource) < 0)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500831 return -EINVAL;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100832
Stefan Richter97c18b72009-01-04 16:23:29 +0100833 r = container_of(resource, struct inbound_transaction_resource,
834 resource);
Stefan Richter281e2032010-01-24 16:45:03 +0100835 if (is_fcp_request(r->request))
836 goto out;
837
Clemens Ladischa10c0ce72010-05-19 08:28:32 +0200838 if (a->length != fw_get_response_length(r->request)) {
839 ret = -EINVAL;
840 kfree(r->request);
841 goto out;
842 }
843 if (copy_from_user(r->data, u64_to_uptr(a->data), a->length)) {
Stefan Richter281e2032010-01-24 16:45:03 +0100844 ret = -EFAULT;
845 kfree(r->request);
846 goto out;
Stefan Richter7e44c0b2009-10-08 00:39:56 +0200847 }
Jay Fenlason08bd34c2010-05-18 14:02:45 -0400848 fw_send_response(r->card, r->request, a->rcode);
Stefan Richter7e44c0b2009-10-08 00:39:56 +0200849 out:
Stefan Richter0244f572010-06-20 22:52:27 +0200850 fw_card_put(r->card);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500851 kfree(r);
852
Stefan Richter7e44c0b2009-10-08 00:39:56 +0200853 return ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500854}
855
Stefan Richter6e95dea2010-02-21 17:56:21 +0100856static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg53718422007-03-07 12:12:42 -0500857{
Stefan Richter02d37be2010-07-08 16:09:06 +0200858 fw_schedule_bus_reset(client->device->card, true,
Stefan Richter6e95dea2010-02-21 17:56:21 +0100859 arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET);
Stefan Richter02d37be2010-07-08 16:09:06 +0200860 return 0;
Kristian Høgsberg53718422007-03-07 12:12:42 -0500861}
862
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400863static void release_descriptor(struct client *client,
864 struct client_resource *resource)
865{
Stefan Richter97c18b72009-01-04 16:23:29 +0100866 struct descriptor_resource *r =
867 container_of(resource, struct descriptor_resource, resource);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400868
Stefan Richter97c18b72009-01-04 16:23:29 +0100869 fw_core_remove_descriptor(&r->descriptor);
870 kfree(r);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400871}
872
Stefan Richter6e95dea2010-02-21 17:56:21 +0100873static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200874{
Stefan Richter6e95dea2010-02-21 17:56:21 +0100875 struct fw_cdev_add_descriptor *a = &arg->add_descriptor;
Stefan Richter97c18b72009-01-04 16:23:29 +0100876 struct descriptor_resource *r;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100877 int ret;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200878
Stefan Richterde487da2009-03-10 21:00:23 +0100879 /* Access policy: Allow this ioctl only on local nodes' device files. */
Stefan Richter92368892009-05-13 21:42:14 +0200880 if (!client->device->is_local)
Stefan Richterde487da2009-03-10 21:00:23 +0100881 return -ENOSYS;
882
Stefan Richter6e95dea2010-02-21 17:56:21 +0100883 if (a->length > 256)
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200884 return -EINVAL;
885
Stefan Richter6e95dea2010-02-21 17:56:21 +0100886 r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL);
Stefan Richter97c18b72009-01-04 16:23:29 +0100887 if (r == NULL)
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200888 return -ENOMEM;
889
Stefan Richter6e95dea2010-02-21 17:56:21 +0100890 if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) {
Jay Fenlason45ee3192008-12-21 16:47:17 +0100891 ret = -EFAULT;
892 goto failed;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200893 }
894
Stefan Richter6e95dea2010-02-21 17:56:21 +0100895 r->descriptor.length = a->length;
896 r->descriptor.immediate = a->immediate;
897 r->descriptor.key = a->key;
Stefan Richter97c18b72009-01-04 16:23:29 +0100898 r->descriptor.data = r->data;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200899
Stefan Richter97c18b72009-01-04 16:23:29 +0100900 ret = fw_core_add_descriptor(&r->descriptor);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100901 if (ret < 0)
902 goto failed;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200903
Stefan Richter97c18b72009-01-04 16:23:29 +0100904 r->resource.release = release_descriptor;
905 ret = add_client_resource(client, &r->resource, GFP_KERNEL);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100906 if (ret < 0) {
Stefan Richter97c18b72009-01-04 16:23:29 +0100907 fw_core_remove_descriptor(&r->descriptor);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100908 goto failed;
909 }
Stefan Richter6e95dea2010-02-21 17:56:21 +0100910 a->handle = r->resource.handle;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200911
912 return 0;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100913 failed:
Stefan Richter97c18b72009-01-04 16:23:29 +0100914 kfree(r);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100915
916 return ret;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200917}
918
Stefan Richter6e95dea2010-02-21 17:56:21 +0100919static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200920{
Stefan Richter6e95dea2010-02-21 17:56:21 +0100921 return release_client_resource(client, arg->remove_descriptor.handle,
Jay Fenlason45ee3192008-12-21 16:47:17 +0100922 release_descriptor, NULL);
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200923}
924
Stefan Richter53dca512008-12-14 21:47:04 +0100925static void iso_callback(struct fw_iso_context *context, u32 cycle,
926 size_t header_length, void *header, void *data)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500927{
928 struct client *client = data;
Stefan Richter97c18b72009-01-04 16:23:29 +0100929 struct iso_interrupt_event *e;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500930
Stefan Richter56d04cb12010-06-08 00:20:10 +0200931 e = kmalloc(sizeof(*e) + header_length, GFP_ATOMIC);
Stefan Richterbf54e142010-07-16 22:25:51 +0200932 if (e == NULL) {
Stefan Richter26b49502012-02-18 22:03:14 +0100933 fw_notice(context->card, "out of memory when allocating event\n");
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500934 return;
Stefan Richterbf54e142010-07-16 22:25:51 +0200935 }
Stefan Richter97c18b72009-01-04 16:23:29 +0100936 e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT;
937 e->interrupt.closure = client->iso_closure;
938 e->interrupt.cycle = cycle;
939 e->interrupt.header_length = header_length;
940 memcpy(e->interrupt.header, header, header_length);
941 queue_event(client, &e->event, &e->interrupt,
942 sizeof(e->interrupt) + header_length, NULL, 0);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500943}
944
Stefan Richter872e3302010-07-29 18:19:22 +0200945static void iso_mc_callback(struct fw_iso_context *context,
946 dma_addr_t completed, void *data)
947{
948 struct client *client = data;
949 struct iso_interrupt_mc_event *e;
950
951 e = kmalloc(sizeof(*e), GFP_ATOMIC);
952 if (e == NULL) {
Stefan Richter26b49502012-02-18 22:03:14 +0100953 fw_notice(context->card, "out of memory when allocating event\n");
Stefan Richter872e3302010-07-29 18:19:22 +0200954 return;
955 }
956 e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL;
957 e->interrupt.closure = client->iso_closure;
958 e->interrupt.completed = fw_iso_buffer_lookup(&client->buffer,
959 completed);
960 queue_event(client, &e->event, &e->interrupt,
961 sizeof(e->interrupt), NULL, 0);
962}
963
Stefan Richter0b6c4852012-04-09 20:51:18 +0200964static enum dma_data_direction iso_dma_direction(struct fw_iso_context *context)
965{
966 if (context->type == FW_ISO_CONTEXT_TRANSMIT)
967 return DMA_TO_DEVICE;
968 else
969 return DMA_FROM_DEVICE;
970}
971
Stefan Richter6e95dea2010-02-21 17:56:21 +0100972static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500973{
Stefan Richter6e95dea2010-02-21 17:56:21 +0100974 struct fw_cdev_create_iso_context *a = &arg->create_iso_context;
Kristian Høgsberg24315c52007-06-20 17:48:07 -0400975 struct fw_iso_context *context;
Stefan Richter872e3302010-07-29 18:19:22 +0200976 fw_iso_callback_t cb;
Stefan Richter0b6c4852012-04-09 20:51:18 +0200977 int ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500978
Stefan Richtereb5b35a2010-07-07 14:13:14 +0200979 BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT != FW_ISO_CONTEXT_TRANSMIT ||
Stefan Richter872e3302010-07-29 18:19:22 +0200980 FW_CDEV_ISO_CONTEXT_RECEIVE != FW_ISO_CONTEXT_RECEIVE ||
981 FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL !=
982 FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL);
Kristian Høgsberg21efb3c2007-02-16 17:34:50 -0500983
Stefan Richter6e95dea2010-02-21 17:56:21 +0100984 switch (a->type) {
Stefan Richter872e3302010-07-29 18:19:22 +0200985 case FW_ISO_CONTEXT_TRANSMIT:
986 if (a->speed > SCODE_3200 || a->channel > 63)
Kristian Høgsbergc70dc782007-03-14 17:34:53 -0400987 return -EINVAL;
Stefan Richter872e3302010-07-29 18:19:22 +0200988
989 cb = iso_callback;
Kristian Høgsbergc70dc782007-03-14 17:34:53 -0400990 break;
991
Stefan Richter872e3302010-07-29 18:19:22 +0200992 case FW_ISO_CONTEXT_RECEIVE:
993 if (a->header_size < 4 || (a->header_size & 3) ||
994 a->channel > 63)
Kristian Høgsbergc70dc782007-03-14 17:34:53 -0400995 return -EINVAL;
Stefan Richter872e3302010-07-29 18:19:22 +0200996
997 cb = iso_callback;
998 break;
999
1000 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
1001 cb = (fw_iso_callback_t)iso_mc_callback;
Kristian Høgsbergc70dc782007-03-14 17:34:53 -04001002 break;
1003
1004 default:
Kristian Høgsberg21efb3c2007-02-16 17:34:50 -05001005 return -EINVAL;
Kristian Høgsbergc70dc782007-03-14 17:34:53 -04001006 }
1007
Stefan Richter6e95dea2010-02-21 17:56:21 +01001008 context = fw_iso_context_create(client->device->card, a->type,
Stefan Richter872e3302010-07-29 18:19:22 +02001009 a->channel, a->speed, a->header_size, cb, client);
Kristian Høgsberg24315c52007-06-20 17:48:07 -04001010 if (IS_ERR(context))
1011 return PTR_ERR(context);
1012
Clemens Ladischbdfe2732010-06-14 11:46:25 +02001013 /* We only support one context at this time. */
1014 spin_lock_irq(&client->lock);
1015 if (client->iso_context != NULL) {
1016 spin_unlock_irq(&client->lock);
1017 fw_iso_context_destroy(context);
Stefan Richter0b6c4852012-04-09 20:51:18 +02001018
Clemens Ladischbdfe2732010-06-14 11:46:25 +02001019 return -EBUSY;
1020 }
Stefan Richter0b6c4852012-04-09 20:51:18 +02001021 if (!client->buffer_is_mapped) {
1022 ret = fw_iso_buffer_map_dma(&client->buffer,
1023 client->device->card,
1024 iso_dma_direction(context));
1025 if (ret < 0) {
1026 spin_unlock_irq(&client->lock);
1027 fw_iso_context_destroy(context);
1028
1029 return ret;
1030 }
1031 client->buffer_is_mapped = true;
1032 }
Stefan Richter6e95dea2010-02-21 17:56:21 +01001033 client->iso_closure = a->closure;
Kristian Høgsberg24315c52007-06-20 17:48:07 -04001034 client->iso_context = context;
Clemens Ladischbdfe2732010-06-14 11:46:25 +02001035 spin_unlock_irq(&client->lock);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001036
Stefan Richter6e95dea2010-02-21 17:56:21 +01001037 a->handle = 0;
Kristian Høgsbergabaa5742007-04-30 15:03:14 -04001038
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001039 return 0;
1040}
1041
Stefan Richter872e3302010-07-29 18:19:22 +02001042static int ioctl_set_iso_channels(struct client *client, union ioctl_arg *arg)
1043{
1044 struct fw_cdev_set_iso_channels *a = &arg->set_iso_channels;
1045 struct fw_iso_context *ctx = client->iso_context;
1046
1047 if (ctx == NULL || a->handle != 0)
1048 return -EINVAL;
1049
1050 return fw_iso_context_set_channels(ctx, &a->channels);
1051}
1052
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -04001053/* Macros for decoding the iso packet control header. */
1054#define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff)
1055#define GET_INTERRUPT(v) (((v) >> 16) & 0x01)
1056#define GET_SKIP(v) (((v) >> 17) & 0x01)
Stefan Richter7a100342008-09-12 18:09:55 +02001057#define GET_TAG(v) (((v) >> 18) & 0x03)
1058#define GET_SY(v) (((v) >> 20) & 0x0f)
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -04001059#define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff)
1060
Stefan Richter6e95dea2010-02-21 17:56:21 +01001061static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001062{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001063 struct fw_cdev_queue_iso *a = &arg->queue_iso;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001064 struct fw_cdev_iso_packet __user *p, *end, *next;
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -05001065 struct fw_iso_context *ctx = client->iso_context;
Stefan Richter872e3302010-07-29 18:19:22 +02001066 unsigned long payload, buffer_end, transmit_header_bytes = 0;
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -04001067 u32 control;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001068 int count;
1069 struct {
1070 struct fw_iso_packet packet;
1071 u8 header[256];
1072 } u;
1073
Stefan Richter6e95dea2010-02-21 17:56:21 +01001074 if (ctx == NULL || a->handle != 0)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001075 return -EINVAL;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001076
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001077 /*
1078 * If the user passes a non-NULL data pointer, has mmap()'ed
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001079 * the iso buffer, and the pointer points inside the buffer,
1080 * we setup the payload pointers accordingly. Otherwise we
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001081 * set them both to 0, which will still let packets with
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001082 * payload_length == 0 through. In other words, if no packets
1083 * use the indirect payload, the iso buffer need not be mapped
Stefan Richter6e95dea2010-02-21 17:56:21 +01001084 * and the a->data pointer is ignored.
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001085 */
Stefan Richter6e95dea2010-02-21 17:56:21 +01001086 payload = (unsigned long)a->data - client->vm_start;
Kristian Høgsbergef370ee2007-03-28 20:46:23 +02001087 buffer_end = client->buffer.page_count << PAGE_SHIFT;
Stefan Richter6e95dea2010-02-21 17:56:21 +01001088 if (a->data == 0 || client->buffer.pages == NULL ||
Kristian Høgsbergef370ee2007-03-28 20:46:23 +02001089 payload >= buffer_end) {
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001090 payload = 0;
Kristian Høgsbergef370ee2007-03-28 20:46:23 +02001091 buffer_end = 0;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001092 }
1093
Stefan Richter872e3302010-07-29 18:19:22 +02001094 if (ctx->type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL && payload & 3)
1095 return -EINVAL;
Al Viro1ccc9142007-10-14 19:34:40 +01001096
Stefan Richter872e3302010-07-29 18:19:22 +02001097 p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets);
Stefan Richter6e95dea2010-02-21 17:56:21 +01001098 if (!access_ok(VERIFY_READ, p, a->size))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001099 return -EFAULT;
1100
Stefan Richter6e95dea2010-02-21 17:56:21 +01001101 end = (void __user *)p + a->size;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001102 count = 0;
1103 while (p < end) {
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -04001104 if (get_user(control, &p->control))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001105 return -EFAULT;
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -04001106 u.packet.payload_length = GET_PAYLOAD_LENGTH(control);
1107 u.packet.interrupt = GET_INTERRUPT(control);
1108 u.packet.skip = GET_SKIP(control);
1109 u.packet.tag = GET_TAG(control);
1110 u.packet.sy = GET_SY(control);
1111 u.packet.header_length = GET_HEADER_LENGTH(control);
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05001112
Stefan Richter872e3302010-07-29 18:19:22 +02001113 switch (ctx->type) {
1114 case FW_ISO_CONTEXT_TRANSMIT:
1115 if (u.packet.header_length & 3)
Clemens Ladisch385ab5bc2010-03-31 16:26:46 +02001116 return -EINVAL;
Stefan Richterae2a97662010-07-29 09:31:56 +02001117 transmit_header_bytes = u.packet.header_length;
Stefan Richter872e3302010-07-29 18:19:22 +02001118 break;
1119
1120 case FW_ISO_CONTEXT_RECEIVE:
Stefan Richter69e61d02010-07-28 23:49:45 +02001121 if (u.packet.header_length == 0 ||
1122 u.packet.header_length % ctx->header_size != 0)
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05001123 return -EINVAL;
Stefan Richter872e3302010-07-29 18:19:22 +02001124 break;
1125
1126 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
1127 if (u.packet.payload_length == 0 ||
1128 u.packet.payload_length & 3)
1129 return -EINVAL;
1130 break;
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05001131 }
1132
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001133 next = (struct fw_cdev_iso_packet __user *)
Stefan Richterae2a97662010-07-29 09:31:56 +02001134 &p->header[transmit_header_bytes / 4];
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001135 if (next > end)
1136 return -EINVAL;
1137 if (__copy_from_user
Stefan Richterae2a97662010-07-29 09:31:56 +02001138 (u.packet.header, p->header, transmit_header_bytes))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001139 return -EFAULT;
Kristian Høgsberg98b6cbe2007-02-16 17:34:51 -05001140 if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT &&
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001141 u.packet.header_length + u.packet.payload_length > 0)
1142 return -EINVAL;
Kristian Høgsbergef370ee2007-03-28 20:46:23 +02001143 if (payload + u.packet.payload_length > buffer_end)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001144 return -EINVAL;
1145
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -05001146 if (fw_iso_context_queue(ctx, &u.packet,
1147 &client->buffer, payload))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001148 break;
1149
1150 p = next;
1151 payload += u.packet.payload_length;
1152 count++;
1153 }
Clemens Ladisch13882a82011-05-02 09:33:56 +02001154 fw_iso_context_queue_flush(ctx);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001155
Stefan Richter6e95dea2010-02-21 17:56:21 +01001156 a->size -= uptr_to_u64(p) - a->packets;
1157 a->packets = uptr_to_u64(p);
1158 a->data = client->vm_start + payload;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001159
1160 return count;
1161}
1162
Stefan Richter6e95dea2010-02-21 17:56:21 +01001163static int ioctl_start_iso(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001164{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001165 struct fw_cdev_start_iso *a = &arg->start_iso;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001166
Stefan Richtereb5b35a2010-07-07 14:13:14 +02001167 BUILD_BUG_ON(
1168 FW_CDEV_ISO_CONTEXT_MATCH_TAG0 != FW_ISO_CONTEXT_MATCH_TAG0 ||
1169 FW_CDEV_ISO_CONTEXT_MATCH_TAG1 != FW_ISO_CONTEXT_MATCH_TAG1 ||
1170 FW_CDEV_ISO_CONTEXT_MATCH_TAG2 != FW_ISO_CONTEXT_MATCH_TAG2 ||
1171 FW_CDEV_ISO_CONTEXT_MATCH_TAG3 != FW_ISO_CONTEXT_MATCH_TAG3 ||
1172 FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS != FW_ISO_CONTEXT_MATCH_ALL_TAGS);
1173
Stefan Richter6e95dea2010-02-21 17:56:21 +01001174 if (client->iso_context == NULL || a->handle != 0)
Kristian Høgsbergabaa5742007-04-30 15:03:14 -04001175 return -EINVAL;
Stefan Richterfae60312008-02-20 21:10:06 +01001176
Stefan Richter6e95dea2010-02-21 17:56:21 +01001177 if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE &&
1178 (a->tags == 0 || a->tags > 15 || a->sync > 15))
1179 return -EINVAL;
Kristian Høgsbergeb0306e2007-03-14 17:34:54 -04001180
Stefan Richter6e95dea2010-02-21 17:56:21 +01001181 return fw_iso_context_start(client->iso_context,
1182 a->cycle, a->sync, a->tags);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001183}
1184
Stefan Richter6e95dea2010-02-21 17:56:21 +01001185static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg)
Kristian Høgsbergb8295662007-02-16 17:34:42 -05001186{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001187 struct fw_cdev_stop_iso *a = &arg->stop_iso;
Kristian Høgsbergabaa5742007-04-30 15:03:14 -04001188
Stefan Richter6e95dea2010-02-21 17:56:21 +01001189 if (client->iso_context == NULL || a->handle != 0)
Kristian Høgsbergabaa5742007-04-30 15:03:14 -04001190 return -EINVAL;
1191
Kristian Høgsbergb8295662007-02-16 17:34:42 -05001192 return fw_iso_context_stop(client->iso_context);
1193}
1194
Clemens Ladischd1bbd202012-03-18 19:06:39 +01001195static int ioctl_flush_iso(struct client *client, union ioctl_arg *arg)
1196{
1197 struct fw_cdev_flush_iso *a = &arg->flush_iso;
1198
1199 if (client->iso_context == NULL || a->handle != 0)
1200 return -EINVAL;
1201
1202 return fw_iso_context_flush_completions(client->iso_context);
1203}
1204
Stefan Richter6e95dea2010-02-21 17:56:21 +01001205static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg)
Stefan Richtera64408b2007-09-29 10:41:58 +02001206{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001207 struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2;
Stefan Richtera64408b2007-09-29 10:41:58 +02001208 struct fw_card *card = client->device->card;
Stefan Richterabfe5a02010-02-20 12:13:49 +01001209 struct timespec ts = {0, 0};
Stefan Richter4a9bde92010-02-20 22:24:43 +01001210 u32 cycle_time;
Stefan Richterabfe5a02010-02-20 12:13:49 +01001211 int ret = 0;
Stefan Richtera64408b2007-09-29 10:41:58 +02001212
Stefan Richter4a9bde92010-02-20 22:24:43 +01001213 local_irq_disable();
Stefan Richtera64408b2007-09-29 10:41:58 +02001214
Stefan Richter0fcff4e2010-06-12 20:35:52 +02001215 cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME);
Stefan Richterabfe5a02010-02-20 12:13:49 +01001216
Stefan Richter6e95dea2010-02-21 17:56:21 +01001217 switch (a->clk_id) {
Stefan Richterabfe5a02010-02-20 12:13:49 +01001218 case CLOCK_REALTIME: getnstimeofday(&ts); break;
1219 case CLOCK_MONOTONIC: do_posix_clock_monotonic_gettime(&ts); break;
1220 case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts); break;
1221 default:
1222 ret = -EINVAL;
1223 }
Stefan Richtera64408b2007-09-29 10:41:58 +02001224
Stefan Richter4a9bde92010-02-20 22:24:43 +01001225 local_irq_enable();
Stefan Richtera64408b2007-09-29 10:41:58 +02001226
Stefan Richter6e95dea2010-02-21 17:56:21 +01001227 a->tv_sec = ts.tv_sec;
1228 a->tv_nsec = ts.tv_nsec;
1229 a->cycle_timer = cycle_time;
Stefan Richterabfe5a02010-02-20 12:13:49 +01001230
1231 return ret;
1232}
1233
Stefan Richter6e95dea2010-02-21 17:56:21 +01001234static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg)
Stefan Richterabfe5a02010-02-20 12:13:49 +01001235{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001236 struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer;
Stefan Richterabfe5a02010-02-20 12:13:49 +01001237 struct fw_cdev_get_cycle_timer2 ct2;
1238
1239 ct2.clk_id = CLOCK_REALTIME;
Stefan Richter6e95dea2010-02-21 17:56:21 +01001240 ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2);
Stefan Richterabfe5a02010-02-20 12:13:49 +01001241
Stefan Richter6e95dea2010-02-21 17:56:21 +01001242 a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC;
1243 a->cycle_timer = ct2.cycle_timer;
Stefan Richter4a9bde92010-02-20 22:24:43 +01001244
Stefan Richtera64408b2007-09-29 10:41:58 +02001245 return 0;
1246}
1247
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001248static void iso_resource_work(struct work_struct *work)
1249{
1250 struct iso_resource_event *e;
1251 struct iso_resource *r =
1252 container_of(work, struct iso_resource, work.work);
1253 struct client *client = r->client;
1254 int generation, channel, bandwidth, todo;
1255 bool skip, free, success;
1256
1257 spin_lock_irq(&client->lock);
1258 generation = client->device->generation;
1259 todo = r->todo;
1260 /* Allow 1000ms grace period for other reallocations. */
1261 if (todo == ISO_RES_ALLOC &&
Clemens Ladische71084a2011-01-22 15:05:03 +01001262 time_before64(get_jiffies_64(),
1263 client->device->card->reset_jiffies + HZ)) {
Stefan Richter9fb551b2009-10-08 00:41:10 +02001264 schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3));
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001265 skip = true;
1266 } else {
1267 /* We could be called twice within the same generation. */
1268 skip = todo == ISO_RES_REALLOC &&
1269 r->generation == generation;
1270 }
Stefan Richter1ec3c022009-01-04 16:23:29 +01001271 free = todo == ISO_RES_DEALLOC ||
1272 todo == ISO_RES_ALLOC_ONCE ||
1273 todo == ISO_RES_DEALLOC_ONCE;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001274 r->generation = generation;
1275 spin_unlock_irq(&client->lock);
1276
1277 if (skip)
1278 goto out;
1279
1280 bandwidth = r->bandwidth;
1281
1282 fw_iso_resource_manage(client->device->card, generation,
1283 r->channels, &channel, &bandwidth,
Stefan Richter1ec3c022009-01-04 16:23:29 +01001284 todo == ISO_RES_ALLOC ||
1285 todo == ISO_RES_REALLOC ||
Stefan Richterf30e6d32011-04-22 15:13:54 +02001286 todo == ISO_RES_ALLOC_ONCE);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001287 /*
1288 * Is this generation outdated already? As long as this resource sticks
1289 * in the idr, it will be scheduled again for a newer generation or at
1290 * shutdown.
1291 */
1292 if (channel == -EAGAIN &&
1293 (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC))
1294 goto out;
1295
1296 success = channel >= 0 || bandwidth > 0;
1297
1298 spin_lock_irq(&client->lock);
1299 /*
1300 * Transit from allocation to reallocation, except if the client
1301 * requested deallocation in the meantime.
1302 */
1303 if (r->todo == ISO_RES_ALLOC)
1304 r->todo = ISO_RES_REALLOC;
1305 /*
1306 * Allocation or reallocation failure? Pull this resource out of the
1307 * idr and prepare for deletion, unless the client is shutting down.
1308 */
1309 if (r->todo == ISO_RES_REALLOC && !success &&
1310 !client->in_shutdown &&
1311 idr_find(&client->resource_idr, r->resource.handle)) {
1312 idr_remove(&client->resource_idr, r->resource.handle);
1313 client_put(client);
1314 free = true;
1315 }
1316 spin_unlock_irq(&client->lock);
1317
1318 if (todo == ISO_RES_ALLOC && channel >= 0)
Stefan Richter5d9cb7d272009-01-08 23:07:40 +01001319 r->channels = 1ULL << channel;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001320
1321 if (todo == ISO_RES_REALLOC && success)
1322 goto out;
1323
Stefan Richter1ec3c022009-01-04 16:23:29 +01001324 if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) {
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001325 e = r->e_alloc;
1326 r->e_alloc = NULL;
1327 } else {
1328 e = r->e_dealloc;
1329 r->e_dealloc = NULL;
1330 }
Stefan Richtere21fcf72009-10-08 00:41:38 +02001331 e->iso_resource.handle = r->resource.handle;
1332 e->iso_resource.channel = channel;
1333 e->iso_resource.bandwidth = bandwidth;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001334
1335 queue_event(client, &e->event,
Stefan Richtere21fcf72009-10-08 00:41:38 +02001336 &e->iso_resource, sizeof(e->iso_resource), NULL, 0);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001337
1338 if (free) {
1339 cancel_delayed_work(&r->work);
1340 kfree(r->e_alloc);
1341 kfree(r->e_dealloc);
1342 kfree(r);
1343 }
1344 out:
1345 client_put(client);
1346}
1347
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001348static void release_iso_resource(struct client *client,
1349 struct client_resource *resource)
1350{
1351 struct iso_resource *r =
1352 container_of(resource, struct iso_resource, resource);
1353
1354 spin_lock_irq(&client->lock);
1355 r->todo = ISO_RES_DEALLOC;
Stefan Richter9fb551b2009-10-08 00:41:10 +02001356 schedule_iso_resource(r, 0);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001357 spin_unlock_irq(&client->lock);
1358}
1359
Stefan Richter1ec3c022009-01-04 16:23:29 +01001360static int init_iso_resource(struct client *client,
1361 struct fw_cdev_allocate_iso_resource *request, int todo)
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001362{
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001363 struct iso_resource_event *e1, *e2;
1364 struct iso_resource *r;
1365 int ret;
1366
1367 if ((request->channels == 0 && request->bandwidth == 0) ||
1368 request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL ||
1369 request->bandwidth < 0)
1370 return -EINVAL;
1371
1372 r = kmalloc(sizeof(*r), GFP_KERNEL);
1373 e1 = kmalloc(sizeof(*e1), GFP_KERNEL);
1374 e2 = kmalloc(sizeof(*e2), GFP_KERNEL);
1375 if (r == NULL || e1 == NULL || e2 == NULL) {
1376 ret = -ENOMEM;
1377 goto fail;
1378 }
1379
1380 INIT_DELAYED_WORK(&r->work, iso_resource_work);
1381 r->client = client;
Stefan Richter1ec3c022009-01-04 16:23:29 +01001382 r->todo = todo;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001383 r->generation = -1;
1384 r->channels = request->channels;
1385 r->bandwidth = request->bandwidth;
1386 r->e_alloc = e1;
1387 r->e_dealloc = e2;
1388
Stefan Richtere21fcf72009-10-08 00:41:38 +02001389 e1->iso_resource.closure = request->closure;
1390 e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED;
1391 e2->iso_resource.closure = request->closure;
1392 e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001393
Stefan Richter1ec3c022009-01-04 16:23:29 +01001394 if (todo == ISO_RES_ALLOC) {
1395 r->resource.release = release_iso_resource;
1396 ret = add_client_resource(client, &r->resource, GFP_KERNEL);
Stefan Richter81610b82009-01-11 13:44:46 +01001397 if (ret < 0)
1398 goto fail;
Stefan Richter1ec3c022009-01-04 16:23:29 +01001399 } else {
1400 r->resource.release = NULL;
1401 r->resource.handle = -1;
Stefan Richter9fb551b2009-10-08 00:41:10 +02001402 schedule_iso_resource(r, 0);
Stefan Richter1ec3c022009-01-04 16:23:29 +01001403 }
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001404 request->handle = r->resource.handle;
1405
1406 return 0;
1407 fail:
1408 kfree(r);
1409 kfree(e1);
1410 kfree(e2);
1411
1412 return ret;
1413}
1414
Stefan Richter6e95dea2010-02-21 17:56:21 +01001415static int ioctl_allocate_iso_resource(struct client *client,
1416 union ioctl_arg *arg)
Stefan Richter1ec3c022009-01-04 16:23:29 +01001417{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001418 return init_iso_resource(client,
1419 &arg->allocate_iso_resource, ISO_RES_ALLOC);
Stefan Richter1ec3c022009-01-04 16:23:29 +01001420}
1421
Stefan Richter6e95dea2010-02-21 17:56:21 +01001422static int ioctl_deallocate_iso_resource(struct client *client,
1423 union ioctl_arg *arg)
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001424{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001425 return release_client_resource(client,
1426 arg->deallocate.handle, release_iso_resource, NULL);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001427}
1428
Stefan Richter6e95dea2010-02-21 17:56:21 +01001429static int ioctl_allocate_iso_resource_once(struct client *client,
1430 union ioctl_arg *arg)
Stefan Richter1ec3c022009-01-04 16:23:29 +01001431{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001432 return init_iso_resource(client,
1433 &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE);
Stefan Richter1ec3c022009-01-04 16:23:29 +01001434}
1435
Stefan Richter6e95dea2010-02-21 17:56:21 +01001436static int ioctl_deallocate_iso_resource_once(struct client *client,
1437 union ioctl_arg *arg)
Stefan Richter1ec3c022009-01-04 16:23:29 +01001438{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001439 return init_iso_resource(client,
1440 &arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE);
Stefan Richter1ec3c022009-01-04 16:23:29 +01001441}
1442
Stefan Richterc8a25902009-03-10 20:59:16 +01001443/*
1444 * Returns a speed code: Maximum speed to or from this device,
1445 * limited by the device's link speed, the local node's link speed,
1446 * and all PHY port speeds between the two links.
1447 */
Stefan Richter6e95dea2010-02-21 17:56:21 +01001448static int ioctl_get_speed(struct client *client, union ioctl_arg *arg)
Stefan Richter33580a32009-01-04 16:23:29 +01001449{
Stefan Richterc8a25902009-03-10 20:59:16 +01001450 return client->device->max_speed;
Stefan Richter33580a32009-01-04 16:23:29 +01001451}
1452
Stefan Richter6e95dea2010-02-21 17:56:21 +01001453static int ioctl_send_broadcast_request(struct client *client,
1454 union ioctl_arg *arg)
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +01001455{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001456 struct fw_cdev_send_request *a = &arg->send_request;
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +01001457
Stefan Richter6e95dea2010-02-21 17:56:21 +01001458 switch (a->tcode) {
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +01001459 case TCODE_WRITE_QUADLET_REQUEST:
1460 case TCODE_WRITE_BLOCK_REQUEST:
1461 break;
1462 default:
1463 return -EINVAL;
1464 }
1465
Stefan Richter1566f3d2009-01-04 16:23:29 +01001466 /* Security policy: Only allow accesses to Units Space. */
Stefan Richter6e95dea2010-02-21 17:56:21 +01001467 if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END)
Stefan Richter1566f3d2009-01-04 16:23:29 +01001468 return -EACCES;
1469
Stefan Richter6e95dea2010-02-21 17:56:21 +01001470 return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100);
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +01001471}
1472
Stefan Richter6e95dea2010-02-21 17:56:21 +01001473static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg)
Jay Fenlasonf8c22872009-03-05 19:08:40 +01001474{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001475 struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet;
Stefan Richter18e9b10f2009-03-10 21:02:21 +01001476 struct fw_cdev_send_request request;
1477 int dest;
Jay Fenlasonf8c22872009-03-05 19:08:40 +01001478
Stefan Richter6e95dea2010-02-21 17:56:21 +01001479 if (a->speed > client->device->card->link_speed ||
1480 a->length > 1024 << a->speed)
Stefan Richter18e9b10f2009-03-10 21:02:21 +01001481 return -EIO;
Jay Fenlasonf8c22872009-03-05 19:08:40 +01001482
Stefan Richter6e95dea2010-02-21 17:56:21 +01001483 if (a->tag > 3 || a->channel > 63 || a->sy > 15)
Stefan Richter18e9b10f2009-03-10 21:02:21 +01001484 return -EINVAL;
1485
Stefan Richter6e95dea2010-02-21 17:56:21 +01001486 dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy);
Stefan Richter18e9b10f2009-03-10 21:02:21 +01001487 request.tcode = TCODE_STREAM_DATA;
Stefan Richter6e95dea2010-02-21 17:56:21 +01001488 request.length = a->length;
1489 request.closure = a->closure;
1490 request.data = a->data;
1491 request.generation = a->generation;
Stefan Richter18e9b10f2009-03-10 21:02:21 +01001492
Stefan Richter6e95dea2010-02-21 17:56:21 +01001493 return init_request(client, &request, dest, a->speed);
Jay Fenlasonf8c22872009-03-05 19:08:40 +01001494}
1495
Stefan Richter850bb6f2010-07-16 22:25:14 +02001496static void outbound_phy_packet_callback(struct fw_packet *packet,
1497 struct fw_card *card, int status)
1498{
1499 struct outbound_phy_packet_event *e =
1500 container_of(packet, struct outbound_phy_packet_event, p);
1501
1502 switch (status) {
1503 /* expected: */
1504 case ACK_COMPLETE: e->phy_packet.rcode = RCODE_COMPLETE; break;
1505 /* should never happen with PHY packets: */
1506 case ACK_PENDING: e->phy_packet.rcode = RCODE_COMPLETE; break;
1507 case ACK_BUSY_X:
1508 case ACK_BUSY_A:
1509 case ACK_BUSY_B: e->phy_packet.rcode = RCODE_BUSY; break;
1510 case ACK_DATA_ERROR: e->phy_packet.rcode = RCODE_DATA_ERROR; break;
1511 case ACK_TYPE_ERROR: e->phy_packet.rcode = RCODE_TYPE_ERROR; break;
1512 /* stale generation; cancelled; on certain controllers: no ack */
1513 default: e->phy_packet.rcode = status; break;
1514 }
Stefan Richtercc550212010-07-18 13:00:50 +02001515 e->phy_packet.data[0] = packet->timestamp;
Stefan Richter850bb6f2010-07-16 22:25:14 +02001516
Stefan Richtercc550212010-07-18 13:00:50 +02001517 queue_event(e->client, &e->event, &e->phy_packet,
1518 sizeof(e->phy_packet) + e->phy_packet.length, NULL, 0);
Stefan Richter850bb6f2010-07-16 22:25:14 +02001519 client_put(e->client);
1520}
1521
1522static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg)
1523{
1524 struct fw_cdev_send_phy_packet *a = &arg->send_phy_packet;
1525 struct fw_card *card = client->device->card;
1526 struct outbound_phy_packet_event *e;
1527
1528 /* Access policy: Allow this ioctl only on local nodes' device files. */
1529 if (!client->device->is_local)
1530 return -ENOSYS;
1531
Stefan Richtercc550212010-07-18 13:00:50 +02001532 e = kzalloc(sizeof(*e) + 4, GFP_KERNEL);
Stefan Richter850bb6f2010-07-16 22:25:14 +02001533 if (e == NULL)
1534 return -ENOMEM;
1535
1536 client_get(client);
1537 e->client = client;
1538 e->p.speed = SCODE_100;
1539 e->p.generation = a->generation;
Clemens Ladisch5b06db12010-11-30 08:24:47 +01001540 e->p.header[0] = TCODE_LINK_INTERNAL << 4;
1541 e->p.header[1] = a->data[0];
1542 e->p.header[2] = a->data[1];
1543 e->p.header_length = 12;
Stefan Richter850bb6f2010-07-16 22:25:14 +02001544 e->p.callback = outbound_phy_packet_callback;
1545 e->phy_packet.closure = a->closure;
1546 e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_SENT;
Stefan Richtercc550212010-07-18 13:00:50 +02001547 if (is_ping_packet(a->data))
1548 e->phy_packet.length = 4;
Stefan Richter850bb6f2010-07-16 22:25:14 +02001549
1550 card->driver->send_request(card, &e->p);
1551
1552 return 0;
1553}
1554
Stefan Richterbf54e142010-07-16 22:25:51 +02001555static int ioctl_receive_phy_packets(struct client *client, union ioctl_arg *arg)
1556{
1557 struct fw_cdev_receive_phy_packets *a = &arg->receive_phy_packets;
1558 struct fw_card *card = client->device->card;
1559
1560 /* Access policy: Allow this ioctl only on local nodes' device files. */
1561 if (!client->device->is_local)
1562 return -ENOSYS;
1563
1564 spin_lock_irq(&card->lock);
1565
1566 list_move_tail(&client->phy_receiver_link, &card->phy_receiver_list);
1567 client->phy_receiver_closure = a->closure;
1568
1569 spin_unlock_irq(&card->lock);
1570
1571 return 0;
1572}
1573
1574void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p)
1575{
1576 struct client *client;
1577 struct inbound_phy_packet_event *e;
1578 unsigned long flags;
1579
1580 spin_lock_irqsave(&card->lock, flags);
1581
1582 list_for_each_entry(client, &card->phy_receiver_list, phy_receiver_link) {
1583 e = kmalloc(sizeof(*e) + 8, GFP_ATOMIC);
1584 if (e == NULL) {
Stefan Richter26b49502012-02-18 22:03:14 +01001585 fw_notice(card, "out of memory when allocating event\n");
Stefan Richterbf54e142010-07-16 22:25:51 +02001586 break;
1587 }
1588 e->phy_packet.closure = client->phy_receiver_closure;
1589 e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_RECEIVED;
1590 e->phy_packet.rcode = RCODE_COMPLETE;
1591 e->phy_packet.length = 8;
1592 e->phy_packet.data[0] = p->header[1];
1593 e->phy_packet.data[1] = p->header[2];
1594 queue_event(client, &e->event,
1595 &e->phy_packet, sizeof(e->phy_packet) + 8, NULL, 0);
1596 }
1597
1598 spin_unlock_irqrestore(&card->lock, flags);
1599}
1600
Stefan Richter6e95dea2010-02-21 17:56:21 +01001601static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = {
Stefan Richterb9dc61c2010-07-16 22:24:29 +02001602 [0x00] = ioctl_get_info,
1603 [0x01] = ioctl_send_request,
1604 [0x02] = ioctl_allocate,
1605 [0x03] = ioctl_deallocate,
1606 [0x04] = ioctl_send_response,
1607 [0x05] = ioctl_initiate_bus_reset,
1608 [0x06] = ioctl_add_descriptor,
1609 [0x07] = ioctl_remove_descriptor,
1610 [0x08] = ioctl_create_iso_context,
1611 [0x09] = ioctl_queue_iso,
1612 [0x0a] = ioctl_start_iso,
1613 [0x0b] = ioctl_stop_iso,
1614 [0x0c] = ioctl_get_cycle_timer,
1615 [0x0d] = ioctl_allocate_iso_resource,
1616 [0x0e] = ioctl_deallocate_iso_resource,
1617 [0x0f] = ioctl_allocate_iso_resource_once,
1618 [0x10] = ioctl_deallocate_iso_resource_once,
1619 [0x11] = ioctl_get_speed,
1620 [0x12] = ioctl_send_broadcast_request,
1621 [0x13] = ioctl_send_stream_packet,
1622 [0x14] = ioctl_get_cycle_timer2,
Stefan Richter850bb6f2010-07-16 22:25:14 +02001623 [0x15] = ioctl_send_phy_packet,
Stefan Richterbf54e142010-07-16 22:25:51 +02001624 [0x16] = ioctl_receive_phy_packets,
Stefan Richter872e3302010-07-29 18:19:22 +02001625 [0x17] = ioctl_set_iso_channels,
Clemens Ladischd1bbd202012-03-18 19:06:39 +01001626 [0x18] = ioctl_flush_iso,
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001627};
1628
Stefan Richter53dca512008-12-14 21:47:04 +01001629static int dispatch_ioctl(struct client *client,
1630 unsigned int cmd, void __user *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001631{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001632 union ioctl_arg buffer;
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001633 int ret;
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001634
Stefan Richter64582292010-02-21 17:56:42 +01001635 if (fw_device_is_shutdown(client->device))
1636 return -ENODEV;
1637
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001638 if (_IOC_TYPE(cmd) != '#' ||
Stefan Richter9cac00b2010-04-07 08:30:50 +02001639 _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) ||
1640 _IOC_SIZE(cmd) > sizeof(buffer))
Stefan Richterd873d792011-07-09 16:42:26 +02001641 return -ENOTTY;
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001642
Stefan Richter9cac00b2010-04-07 08:30:50 +02001643 if (_IOC_DIR(cmd) == _IOC_READ)
1644 memset(&buffer, 0, _IOC_SIZE(cmd));
1645
1646 if (_IOC_DIR(cmd) & _IOC_WRITE)
1647 if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd)))
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001648 return -EFAULT;
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001649
Stefan Richter6e95dea2010-02-21 17:56:21 +01001650 ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer);
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001651 if (ret < 0)
1652 return ret;
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001653
Stefan Richter9cac00b2010-04-07 08:30:50 +02001654 if (_IOC_DIR(cmd) & _IOC_READ)
1655 if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd)))
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001656 return -EFAULT;
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001657
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001658 return ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001659}
1660
Stefan Richter53dca512008-12-14 21:47:04 +01001661static long fw_device_op_ioctl(struct file *file,
1662 unsigned int cmd, unsigned long arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001663{
Stefan Richter64582292010-02-21 17:56:42 +01001664 return dispatch_ioctl(file->private_data, cmd, (void __user *)arg);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001665}
1666
1667#ifdef CONFIG_COMPAT
Stefan Richter53dca512008-12-14 21:47:04 +01001668static long fw_device_op_compat_ioctl(struct file *file,
1669 unsigned int cmd, unsigned long arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001670{
Stefan Richter64582292010-02-21 17:56:42 +01001671 return dispatch_ioctl(file->private_data, cmd, compat_ptr(arg));
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001672}
1673#endif
1674
1675static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma)
1676{
1677 struct client *client = file->private_data;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001678 unsigned long size;
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001679 int page_count, ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001680
Jay Fenlason551f4cb2008-05-16 11:15:23 -04001681 if (fw_device_is_shutdown(client->device))
1682 return -ENODEV;
1683
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001684 /* FIXME: We could support multiple buffers, but we don't. */
1685 if (client->buffer.pages != NULL)
1686 return -EBUSY;
1687
1688 if (!(vma->vm_flags & VM_SHARED))
1689 return -EINVAL;
1690
1691 if (vma->vm_start & ~PAGE_MASK)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001692 return -EINVAL;
1693
1694 client->vm_start = vma->vm_start;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001695 size = vma->vm_end - vma->vm_start;
1696 page_count = size >> PAGE_SHIFT;
1697 if (size & ~PAGE_MASK)
1698 return -EINVAL;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001699
Stefan Richter0b6c4852012-04-09 20:51:18 +02001700 ret = fw_iso_buffer_alloc(&client->buffer, page_count);
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001701 if (ret < 0)
1702 return ret;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001703
Stefan Richter0b6c4852012-04-09 20:51:18 +02001704 spin_lock_irq(&client->lock);
1705 if (client->iso_context) {
1706 ret = fw_iso_buffer_map_dma(&client->buffer,
1707 client->device->card,
1708 iso_dma_direction(client->iso_context));
1709 client->buffer_is_mapped = (ret == 0);
1710 }
1711 spin_unlock_irq(&client->lock);
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001712 if (ret < 0)
Stefan Richter0b6c4852012-04-09 20:51:18 +02001713 goto fail;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001714
Stefan Richter0b6c4852012-04-09 20:51:18 +02001715 ret = fw_iso_buffer_map_vma(&client->buffer, vma);
1716 if (ret < 0)
1717 goto fail;
1718
1719 return 0;
1720 fail:
1721 fw_iso_buffer_destroy(&client->buffer, client->device->card);
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001722 return ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001723}
1724
Clemens Ladisch5a5e62d2011-01-10 17:28:39 +01001725static int is_outbound_transaction_resource(int id, void *p, void *data)
1726{
1727 struct client_resource *resource = p;
1728
1729 return resource->release == release_transaction;
1730}
1731
1732static int has_outbound_transactions(struct client *client)
1733{
1734 int ret;
1735
1736 spin_lock_irq(&client->lock);
1737 ret = idr_for_each(&client->resource_idr,
1738 is_outbound_transaction_resource, NULL);
1739 spin_unlock_irq(&client->lock);
1740
1741 return ret;
1742}
1743
Jay Fenlason45ee3192008-12-21 16:47:17 +01001744static int shutdown_resource(int id, void *p, void *data)
1745{
Stefan Richtere21fcf72009-10-08 00:41:38 +02001746 struct client_resource *resource = p;
Jay Fenlason45ee3192008-12-21 16:47:17 +01001747 struct client *client = data;
1748
Stefan Richtere21fcf72009-10-08 00:41:38 +02001749 resource->release(client, resource);
Stefan Richterfb443032009-01-04 16:23:29 +01001750 client_put(client);
Jay Fenlason45ee3192008-12-21 16:47:17 +01001751
1752 return 0;
1753}
1754
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001755static int fw_device_op_release(struct inode *inode, struct file *file)
1756{
1757 struct client *client = file->private_data;
Stefan Richtere21fcf72009-10-08 00:41:38 +02001758 struct event *event, *next_event;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001759
Stefan Richterbf54e142010-07-16 22:25:51 +02001760 spin_lock_irq(&client->device->card->lock);
1761 list_del(&client->phy_receiver_link);
1762 spin_unlock_irq(&client->device->card->lock);
1763
Stefan Richter97811e32008-12-14 19:19:23 +01001764 mutex_lock(&client->device->client_list_mutex);
1765 list_del(&client->link);
1766 mutex_unlock(&client->device->client_list_mutex);
1767
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001768 if (client->iso_context)
1769 fw_iso_context_destroy(client->iso_context);
1770
Stefan Richter36a755c2009-01-05 20:28:10 +01001771 if (client->buffer.pages)
1772 fw_iso_buffer_destroy(&client->buffer, client->device->card);
1773
Jay Fenlason45ee3192008-12-21 16:47:17 +01001774 /* Freeze client->resource_idr and client->event_list */
Stefan Richter3ba94982009-01-04 16:23:29 +01001775 spin_lock_irq(&client->lock);
Jay Fenlason45ee3192008-12-21 16:47:17 +01001776 client->in_shutdown = true;
Stefan Richter3ba94982009-01-04 16:23:29 +01001777 spin_unlock_irq(&client->lock);
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +02001778
Clemens Ladisch5a5e62d2011-01-10 17:28:39 +01001779 wait_event(client->tx_flush_wait, !has_outbound_transactions(client));
1780
Jay Fenlason45ee3192008-12-21 16:47:17 +01001781 idr_for_each(&client->resource_idr, shutdown_resource, client);
1782 idr_remove_all(&client->resource_idr);
1783 idr_destroy(&client->resource_idr);
Kristian Høgsberg28cf6a02007-03-07 12:12:50 -05001784
Stefan Richtere21fcf72009-10-08 00:41:38 +02001785 list_for_each_entry_safe(event, next_event, &client->event_list, link)
1786 kfree(event);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001787
Stefan Richterfb443032009-01-04 16:23:29 +01001788 client_put(client);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001789
1790 return 0;
1791}
1792
1793static unsigned int fw_device_op_poll(struct file *file, poll_table * pt)
1794{
1795 struct client *client = file->private_data;
Kristian Høgsberg2603bf22007-03-07 12:12:48 -05001796 unsigned int mask = 0;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001797
1798 poll_wait(file, &client->wait, pt);
1799
Kristian Høgsberg2603bf22007-03-07 12:12:48 -05001800 if (fw_device_is_shutdown(client->device))
1801 mask |= POLLHUP | POLLERR;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001802 if (!list_empty(&client->event_list))
Kristian Høgsberg2603bf22007-03-07 12:12:48 -05001803 mask |= POLLIN | POLLRDNORM;
1804
1805 return mask;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001806}
1807
Stefan Richter21ebcd12007-01-14 15:29:07 +01001808const struct file_operations fw_device_ops = {
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001809 .owner = THIS_MODULE,
Stefan Richter3ac26b22010-04-10 16:38:05 +01001810 .llseek = no_llseek,
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001811 .open = fw_device_op_open,
1812 .read = fw_device_op_read,
1813 .unlocked_ioctl = fw_device_op_ioctl,
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001814 .mmap = fw_device_op_mmap,
Stefan Richter3ac26b22010-04-10 16:38:05 +01001815 .release = fw_device_op_release,
1816 .poll = fw_device_op_poll,
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001817#ifdef CONFIG_COMPAT
Stefan Richter5af4e5e2007-01-21 20:45:32 +01001818 .compat_ioctl = fw_device_op_compat_ioctl,
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001819#endif
1820};