blob: 36a7c2d89a010e7a567224c89a01a2ebe0c8fd20 [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
Clemens Ladisch0699a732013-07-22 21:32:09 +020057#define FW_CDEV_VERSION_AUTO_FLUSH_ISO_OVERFLOW 5
Stefan Richter604f4512010-06-20 22:52:55 +020058
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050059struct client {
Kristian Høgsberg344bbc42007-03-07 12:12:43 -050060 u32 version;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050061 struct fw_device *device;
Jay Fenlason45ee3192008-12-21 16:47:17 +010062
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050063 spinlock_t lock;
Jay Fenlason45ee3192008-12-21 16:47:17 +010064 bool in_shutdown;
65 struct idr resource_idr;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050066 struct list_head event_list;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050067 wait_queue_head_t wait;
Clemens Ladisch5a5e62d2011-01-10 17:28:39 +010068 wait_queue_head_t tx_flush_wait;
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -040069 u64 bus_reset_closure;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -050070
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050071 struct fw_iso_context *iso_context;
Kristian Høgsbergabaa5742007-04-30 15:03:14 -040072 u64 iso_closure;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -050073 struct fw_iso_buffer buffer;
74 unsigned long vm_start;
Stefan Richter0b6c4852012-04-09 20:51:18 +020075 bool buffer_is_mapped;
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -050076
Stefan Richterbf54e142010-07-16 22:25:51 +020077 struct list_head phy_receiver_link;
78 u64 phy_receiver_closure;
79
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -050080 struct list_head link;
Stefan Richterfb443032009-01-04 16:23:29 +010081 struct kref kref;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -050082};
83
Stefan Richterfb443032009-01-04 16:23:29 +010084static inline void client_get(struct client *client)
85{
86 kref_get(&client->kref);
87}
88
89static void client_release(struct kref *kref)
90{
91 struct client *client = container_of(kref, struct client, kref);
92
93 fw_device_put(client->device);
94 kfree(client);
95}
96
97static void client_put(struct client *client)
98{
99 kref_put(&client->kref, client_release);
100}
101
Stefan Richter97c18b72009-01-04 16:23:29 +0100102struct client_resource;
103typedef void (*client_resource_release_fn_t)(struct client *,
104 struct client_resource *);
105struct client_resource {
106 client_resource_release_fn_t release;
107 int handle;
108};
109
110struct address_handler_resource {
111 struct client_resource resource;
112 struct fw_address_handler handler;
113 __u64 closure;
114 struct client *client;
115};
116
117struct outbound_transaction_resource {
118 struct client_resource resource;
119 struct fw_transaction transaction;
120};
121
122struct inbound_transaction_resource {
123 struct client_resource resource;
Jay Fenlason08bd34c2010-05-18 14:02:45 -0400124 struct fw_card *card;
Stefan Richter97c18b72009-01-04 16:23:29 +0100125 struct fw_request *request;
126 void *data;
127 size_t length;
128};
129
130struct descriptor_resource {
131 struct client_resource resource;
132 struct fw_descriptor descriptor;
133 u32 data[0];
134};
135
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100136struct iso_resource {
137 struct client_resource resource;
138 struct client *client;
139 /* Schedule work and access todo only with client->lock held. */
140 struct delayed_work work;
Stefan Richter1ec3c022009-01-04 16:23:29 +0100141 enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC,
142 ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100143 int generation;
144 u64 channels;
145 s32 bandwidth;
146 struct iso_resource_event *e_alloc, *e_dealloc;
147};
148
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100149static void release_iso_resource(struct client *, struct client_resource *);
150
Stefan Richter9fb551b2009-10-08 00:41:10 +0200151static void schedule_iso_resource(struct iso_resource *r, unsigned long delay)
152{
153 client_get(r->client);
Stefan Richter105e53f2011-05-01 20:50:31 +0200154 if (!queue_delayed_work(fw_workqueue, &r->work, delay))
Stefan Richter9fb551b2009-10-08 00:41:10 +0200155 client_put(r->client);
156}
157
158static void schedule_if_iso_resource(struct client_resource *resource)
159{
160 if (resource->release == release_iso_resource)
161 schedule_iso_resource(container_of(resource,
162 struct iso_resource, resource), 0);
163}
164
Stefan Richter97c18b72009-01-04 16:23:29 +0100165/*
166 * dequeue_event() just kfree()'s the event, so the event has to be
167 * the first field in a struct XYZ_event.
168 */
169struct event {
170 struct { void *data; size_t size; } v[2];
171 struct list_head link;
172};
173
174struct bus_reset_event {
175 struct event event;
176 struct fw_cdev_event_bus_reset reset;
177};
178
179struct outbound_transaction_event {
180 struct event event;
181 struct client *client;
182 struct outbound_transaction_resource r;
183 struct fw_cdev_event_response response;
184};
185
186struct inbound_transaction_event {
187 struct event event;
Stefan Richtere2055972010-06-20 22:53:55 +0200188 union {
189 struct fw_cdev_event_request request;
190 struct fw_cdev_event_request2 request2;
191 } req;
Stefan Richter97c18b72009-01-04 16:23:29 +0100192};
193
194struct iso_interrupt_event {
195 struct event event;
196 struct fw_cdev_event_iso_interrupt interrupt;
197};
198
Stefan Richter872e3302010-07-29 18:19:22 +0200199struct iso_interrupt_mc_event {
200 struct event event;
201 struct fw_cdev_event_iso_interrupt_mc interrupt;
202};
203
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100204struct iso_resource_event {
205 struct event event;
Stefan Richtere21fcf72009-10-08 00:41:38 +0200206 struct fw_cdev_event_iso_resource iso_resource;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100207};
208
Stefan Richter850bb6f2010-07-16 22:25:14 +0200209struct outbound_phy_packet_event {
210 struct event event;
211 struct client *client;
212 struct fw_packet p;
213 struct fw_cdev_event_phy_packet phy_packet;
214};
215
Stefan Richterbf54e142010-07-16 22:25:51 +0200216struct inbound_phy_packet_event {
217 struct event event;
218 struct fw_cdev_event_phy_packet phy_packet;
219};
220
Stefan Richter9c1176b2011-08-11 00:06:04 +0200221#ifdef CONFIG_COMPAT
222static void __user *u64_to_uptr(u64 value)
223{
224 if (is_compat_task())
225 return compat_ptr(value);
226 else
227 return (void __user *)(unsigned long)value;
228}
229
230static u64 uptr_to_u64(void __user *ptr)
231{
232 if (is_compat_task())
233 return ptr_to_compat(ptr);
234 else
235 return (u64)(unsigned long)ptr;
236}
237#else
238static inline void __user *u64_to_uptr(u64 value)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500239{
240 return (void __user *)(unsigned long)value;
241}
242
Stefan Richter9c1176b2011-08-11 00:06:04 +0200243static inline u64 uptr_to_u64(void __user *ptr)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500244{
Stefan Richter9c1176b2011-08-11 00:06:04 +0200245 return (u64)(unsigned long)ptr;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500246}
Stefan Richter9c1176b2011-08-11 00:06:04 +0200247#endif /* CONFIG_COMPAT */
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500248
249static int fw_device_op_open(struct inode *inode, struct file *file)
250{
251 struct fw_device *device;
252 struct client *client;
253
Stefan Richter96b19062008-02-02 15:01:09 +0100254 device = fw_device_get_by_devt(inode->i_rdev);
Kristian Høgsberga3aca3d2007-03-07 12:12:44 -0500255 if (device == NULL)
256 return -ENODEV;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500257
Jay Fenlason551f4cb2008-05-16 11:15:23 -0400258 if (fw_device_is_shutdown(device)) {
259 fw_device_put(device);
260 return -ENODEV;
261 }
262
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400263 client = kzalloc(sizeof(*client), GFP_KERNEL);
Stefan Richter96b19062008-02-02 15:01:09 +0100264 if (client == NULL) {
265 fw_device_put(device);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500266 return -ENOMEM;
Stefan Richter96b19062008-02-02 15:01:09 +0100267 }
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500268
Stefan Richter96b19062008-02-02 15:01:09 +0100269 client->device = device;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500270 spin_lock_init(&client->lock);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100271 idr_init(&client->resource_idr);
272 INIT_LIST_HEAD(&client->event_list);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500273 init_waitqueue_head(&client->wait);
Clemens Ladisch5a5e62d2011-01-10 17:28:39 +0100274 init_waitqueue_head(&client->tx_flush_wait);
Stefan Richterbf54e142010-07-16 22:25:51 +0200275 INIT_LIST_HEAD(&client->phy_receiver_link);
Stefan Richter93b37902011-07-09 16:43:22 +0200276 INIT_LIST_HEAD(&client->link);
Stefan Richterfb443032009-01-04 16:23:29 +0100277 kref_init(&client->kref);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500278
279 file->private_data = client;
280
Stefan Richter3ac26b22010-04-10 16:38:05 +0100281 return nonseekable_open(inode, file);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500282}
283
284static void queue_event(struct client *client, struct event *event,
285 void *data0, size_t size0, void *data1, size_t size1)
286{
287 unsigned long flags;
288
289 event->v[0].data = data0;
290 event->v[0].size = size0;
291 event->v[1].data = data1;
292 event->v[1].size = size1;
293
294 spin_lock_irqsave(&client->lock, flags);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100295 if (client->in_shutdown)
296 kfree(event);
297 else
298 list_add_tail(&event->link, &client->event_list);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500299 spin_unlock_irqrestore(&client->lock, flags);
Jay Fenlason83431cb2007-10-08 17:00:29 -0400300
301 wake_up_interruptible(&client->wait);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500302}
303
Stefan Richter53dca512008-12-14 21:47:04 +0100304static int dequeue_event(struct client *client,
305 char __user *buffer, size_t count)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500306{
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500307 struct event *event;
308 size_t size, total;
Stefan Richter2dbd7d72008-12-14 21:45:45 +0100309 int i, ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500310
Stefan Richter2dbd7d72008-12-14 21:45:45 +0100311 ret = wait_event_interruptible(client->wait,
312 !list_empty(&client->event_list) ||
313 fw_device_is_shutdown(client->device));
314 if (ret < 0)
315 return ret;
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500316
317 if (list_empty(&client->event_list) &&
318 fw_device_is_shutdown(client->device))
319 return -ENODEV;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500320
Stefan Richter3ba94982009-01-04 16:23:29 +0100321 spin_lock_irq(&client->lock);
Stefan Richtera459b8a2008-12-21 16:49:57 +0100322 event = list_first_entry(&client->event_list, struct event, link);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500323 list_del(&event->link);
Stefan Richter3ba94982009-01-04 16:23:29 +0100324 spin_unlock_irq(&client->lock);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500325
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500326 total = 0;
327 for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) {
328 size = min(event->v[i].size, count - total);
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500329 if (copy_to_user(buffer + total, event->v[i].data, size)) {
Stefan Richter2dbd7d72008-12-14 21:45:45 +0100330 ret = -EFAULT;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500331 goto out;
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500332 }
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500333 total += size;
334 }
Stefan Richter2dbd7d72008-12-14 21:45:45 +0100335 ret = total;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500336
337 out:
338 kfree(event);
339
Stefan Richter2dbd7d72008-12-14 21:45:45 +0100340 return ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500341}
342
Stefan Richter53dca512008-12-14 21:47:04 +0100343static ssize_t fw_device_op_read(struct file *file, char __user *buffer,
344 size_t count, loff_t *offset)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500345{
346 struct client *client = file->private_data;
347
348 return dequeue_event(client, buffer, count);
349}
350
Stefan Richter53dca512008-12-14 21:47:04 +0100351static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event,
352 struct client *client)
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500353{
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -0400354 struct fw_card *card = client->device->card;
Jay Fenlasoncf417e542008-10-03 11:19:09 -0400355
Stefan Richter3ba94982009-01-04 16:23:29 +0100356 spin_lock_irq(&card->lock);
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500357
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -0400358 event->closure = client->bus_reset_closure;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500359 event->type = FW_CDEV_EVENT_BUS_RESET;
Stefan Richtercf5a56a2008-01-24 01:53:51 +0100360 event->generation = client->device->generation;
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -0400361 event->node_id = client->device->node_id;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500362 event->local_node_id = card->local_node->node_id;
Stefan Richter250b2b62010-06-21 23:24:35 +0200363 event->bm_node_id = card->bm_node_id;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500364 event->irm_node_id = card->irm_node->node_id;
365 event->root_node_id = card->root_node->node_id;
Jay Fenlasoncf417e542008-10-03 11:19:09 -0400366
Stefan Richter3ba94982009-01-04 16:23:29 +0100367 spin_unlock_irq(&card->lock);
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500368}
369
Stefan Richter53dca512008-12-14 21:47:04 +0100370static void for_each_client(struct fw_device *device,
371 void (*callback)(struct client *client))
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500372{
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500373 struct client *c;
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500374
Stefan Richterd67cfb92008-10-05 10:37:11 +0200375 mutex_lock(&device->client_list_mutex);
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500376 list_for_each_entry(c, &device->client_list, link)
377 callback(c);
Stefan Richterd67cfb92008-10-05 10:37:11 +0200378 mutex_unlock(&device->client_list_mutex);
Kristian Høgsberg2603bf22007-03-07 12:12:48 -0500379}
380
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100381static int schedule_reallocations(int id, void *p, void *data)
382{
Stefan Richter9fb551b2009-10-08 00:41:10 +0200383 schedule_if_iso_resource(p);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100384
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100385 return 0;
386}
387
Stefan Richter53dca512008-12-14 21:47:04 +0100388static void queue_bus_reset_event(struct client *client)
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500389{
Stefan Richter97c18b72009-01-04 16:23:29 +0100390 struct bus_reset_event *e;
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500391
Stefan Richter97c18b72009-01-04 16:23:29 +0100392 e = kzalloc(sizeof(*e), GFP_KERNEL);
Stefan Richtercfb0c9d2013-03-24 17:32:00 +0100393 if (e == NULL)
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500394 return;
Kristian Høgsberg97bd9ef2007-03-07 12:12:41 -0500395
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;
Clemens Ladischd1bbd202012-03-18 19:06:39 +0100441 struct fw_cdev_flush_iso flush_iso;
Stefan Richter6e95dea2010-02-21 17:56:21 +0100442};
443
444static int ioctl_get_info(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500445{
Stefan Richter6e95dea2010-02-21 17:56:21 +0100446 struct fw_cdev_get_info *a = &arg->get_info;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500447 struct fw_cdev_event_bus_reset bus_reset;
Stefan Richterc9755e12008-03-24 20:54:28 +0100448 unsigned long ret = 0;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500449
Stefan Richter6e95dea2010-02-21 17:56:21 +0100450 client->version = a->version;
Stefan Richter604f4512010-06-20 22:52:55 +0200451 a->version = FW_CDEV_KERNEL_VERSION;
Stefan Richter6e95dea2010-02-21 17:56:21 +0100452 a->card = client->device->card->index;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500453
Stefan Richterc9755e12008-03-24 20:54:28 +0100454 down_read(&fw_device_rwsem);
455
Stefan Richter6e95dea2010-02-21 17:56:21 +0100456 if (a->rom != 0) {
457 size_t want = a->rom_length;
Stefan Richterd84702a2007-03-20 19:42:15 +0100458 size_t have = client->device->config_rom_length * 4;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500459
Stefan Richter6e95dea2010-02-21 17:56:21 +0100460 ret = copy_to_user(u64_to_uptr(a->rom),
461 client->device->config_rom, min(want, have));
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500462 }
Stefan Richter6e95dea2010-02-21 17:56:21 +0100463 a->rom_length = client->device->config_rom_length * 4;
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500464
Stefan Richterc9755e12008-03-24 20:54:28 +0100465 up_read(&fw_device_rwsem);
466
467 if (ret != 0)
468 return -EFAULT;
469
Stefan Richter93b37902011-07-09 16:43:22 +0200470 mutex_lock(&client->device->client_list_mutex);
471
Stefan Richter6e95dea2010-02-21 17:56:21 +0100472 client->bus_reset_closure = a->bus_reset_closure;
473 if (a->bus_reset != 0) {
Kristian Høgsbergda8ecff2007-03-27 01:43:39 -0400474 fill_bus_reset_event(&bus_reset, client);
Stefan Richter790198f2012-10-06 14:12:56 +0200475 /* unaligned size of bus_reset is 36 bytes */
476 ret = copy_to_user(u64_to_uptr(a->bus_reset), &bus_reset, 36);
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500477 }
Stefan Richter93b37902011-07-09 16:43:22 +0200478 if (ret == 0 && list_empty(&client->link))
479 list_add_tail(&client->link, &client->device->client_list);
Kristian Høgsberg344bbc42007-03-07 12:12:43 -0500480
Stefan Richter93b37902011-07-09 16:43:22 +0200481 mutex_unlock(&client->device->client_list_mutex);
482
483 return ret ? -EFAULT : 0;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500484}
485
Stefan Richter53dca512008-12-14 21:47:04 +0100486static int add_client_resource(struct client *client,
487 struct client_resource *resource, gfp_t gfp_mask)
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400488{
Mel Gormand0164ad2015-11-06 16:28:21 -0800489 bool preload = gfpflags_allow_blocking(gfp_mask);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400490 unsigned long flags;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100491 int ret;
492
Tejun Heo37b61892013-02-27 17:04:05 -0800493 if (preload)
494 idr_preload(gfp_mask);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400495 spin_lock_irqsave(&client->lock, flags);
Tejun Heo37b61892013-02-27 17:04:05 -0800496
Jay Fenlason45ee3192008-12-21 16:47:17 +0100497 if (client->in_shutdown)
498 ret = -ECANCELED;
499 else
Tejun Heo37b61892013-02-27 17:04:05 -0800500 ret = idr_alloc(&client->resource_idr, resource, 0, 0,
501 GFP_NOWAIT);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +0100502 if (ret >= 0) {
Tejun Heo37b61892013-02-27 17:04:05 -0800503 resource->handle = ret;
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 }
Jay Fenlason45ee3192008-12-21 16:47:17 +0100507
Tejun Heo37b61892013-02-27 17:04:05 -0800508 spin_unlock_irqrestore(&client->lock, flags);
509 if (preload)
510 idr_preload_end();
Jay Fenlason45ee3192008-12-21 16:47:17 +0100511
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 Richter18e9b102009-03-10 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 Richtercfb0c9d2013-03-24 17:32:00 +0100695 if (r == NULL || e == NULL)
Jay Fenlason45ee3192008-12-21 16:47:17 +0100696 goto failed;
Stefan Richtercfb0c9d2013-03-24 17:32:00 +0100697
Jay Fenlason08bd34c2010-05-18 14:02:45 -0400698 r->card = card;
Stefan Richter97c18b72009-01-04 16:23:29 +0100699 r->request = request;
700 r->data = payload;
701 r->length = length;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500702
Stefan Richter281e2032010-01-24 16:45:03 +0100703 if (is_fcp_request(request)) {
704 /*
705 * FIXME: Let core-transaction.c manage a
706 * single reference-counted copy?
707 */
708 fcp_frame = kmemdup(payload, length, GFP_ATOMIC);
709 if (fcp_frame == NULL)
710 goto failed;
711
712 r->data = fcp_frame;
713 }
714
Stefan Richter97c18b72009-01-04 16:23:29 +0100715 r->resource.release = release_request;
716 ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100717 if (ret < 0)
718 goto failed;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500719
Stefan Richtere2055972010-06-20 22:53:55 +0200720 if (handler->client->version < FW_CDEV_VERSION_EVENT_REQUEST2) {
721 struct fw_cdev_event_request *req = &e->req.request;
722
723 if (tcode & 0x10)
724 tcode = TCODE_LOCK_REQUEST;
725
726 req->type = FW_CDEV_EVENT_REQUEST;
727 req->tcode = tcode;
728 req->offset = offset;
729 req->length = length;
730 req->handle = r->resource.handle;
731 req->closure = handler->closure;
732 event_size0 = sizeof(*req);
733 } else {
734 struct fw_cdev_event_request2 *req = &e->req.request2;
735
736 req->type = FW_CDEV_EVENT_REQUEST2;
737 req->tcode = tcode;
738 req->offset = offset;
739 req->source_node_id = source;
740 req->destination_node_id = destination;
741 req->card = card->index;
742 req->generation = generation;
743 req->length = length;
744 req->handle = r->resource.handle;
745 req->closure = handler->closure;
746 event_size0 = sizeof(*req);
747 }
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500748
Stefan Richter97c18b72009-01-04 16:23:29 +0100749 queue_event(handler->client, &e->event,
Stefan Richtere2055972010-06-20 22:53:55 +0200750 &e->req, event_size0, r->data, length);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100751 return;
752
753 failed:
Stefan Richter97c18b72009-01-04 16:23:29 +0100754 kfree(r);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100755 kfree(e);
Stefan Richter281e2032010-01-24 16:45:03 +0100756 kfree(fcp_frame);
757
758 if (!is_fcp_request(request))
Clemens Ladischdb5d2472009-12-24 12:05:58 +0100759 fw_send_response(card, request, RCODE_CONFLICT_ERROR);
Stefan Richter0244f572010-06-20 22:52:27 +0200760
761 fw_card_put(card);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500762}
763
Stefan Richter53dca512008-12-14 21:47:04 +0100764static void release_address_handler(struct client *client,
765 struct client_resource *resource)
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400766{
Stefan Richter97c18b72009-01-04 16:23:29 +0100767 struct address_handler_resource *r =
768 container_of(resource, struct address_handler_resource, resource);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400769
Stefan Richter97c18b72009-01-04 16:23:29 +0100770 fw_core_remove_address_handler(&r->handler);
771 kfree(r);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400772}
773
Stefan Richter6e95dea2010-02-21 17:56:21 +0100774static int ioctl_allocate(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500775{
Stefan Richter6e95dea2010-02-21 17:56:21 +0100776 struct fw_cdev_allocate *a = &arg->allocate;
Stefan Richter97c18b72009-01-04 16:23:29 +0100777 struct address_handler_resource *r;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500778 struct fw_address_region region;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100779 int ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500780
Stefan Richter97c18b72009-01-04 16:23:29 +0100781 r = kmalloc(sizeof(*r), GFP_KERNEL);
782 if (r == NULL)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500783 return -ENOMEM;
784
Stefan Richter6e95dea2010-02-21 17:56:21 +0100785 region.start = a->offset;
Stefan Richter8e2b2b42010-07-23 13:05:39 +0200786 if (client->version < FW_CDEV_VERSION_ALLOCATE_REGION_END)
787 region.end = a->offset + a->length;
788 else
789 region.end = a->region_end;
790
Stefan Richter6e95dea2010-02-21 17:56:21 +0100791 r->handler.length = a->length;
Stefan Richter97c18b72009-01-04 16:23:29 +0100792 r->handler.address_callback = handle_request;
Stefan Richter6e95dea2010-02-21 17:56:21 +0100793 r->handler.callback_data = r;
794 r->closure = a->closure;
795 r->client = client;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500796
Stefan Richter97c18b72009-01-04 16:23:29 +0100797 ret = fw_core_add_address_handler(&r->handler, &region);
Stefan Richter3e0b5f02008-12-14 19:21:01 +0100798 if (ret < 0) {
Stefan Richter97c18b72009-01-04 16:23:29 +0100799 kfree(r);
Stefan Richter3e0b5f02008-12-14 19:21:01 +0100800 return ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500801 }
Stefan Richter8e2b2b42010-07-23 13:05:39 +0200802 a->offset = r->handler.offset;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500803
Stefan Richter97c18b72009-01-04 16:23:29 +0100804 r->resource.release = release_address_handler;
805 ret = add_client_resource(client, &r->resource, GFP_KERNEL);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100806 if (ret < 0) {
Stefan Richter97c18b72009-01-04 16:23:29 +0100807 release_address_handler(client, &r->resource);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100808 return ret;
809 }
Stefan Richter6e95dea2010-02-21 17:56:21 +0100810 a->handle = r->resource.handle;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500811
812 return 0;
813}
814
Stefan Richter6e95dea2010-02-21 17:56:21 +0100815static int ioctl_deallocate(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg94723162007-03-14 17:34:55 -0400816{
Stefan Richter6e95dea2010-02-21 17:56:21 +0100817 return release_client_resource(client, arg->deallocate.handle,
Jay Fenlason45ee3192008-12-21 16:47:17 +0100818 release_address_handler, NULL);
Kristian Høgsberg94723162007-03-14 17:34:55 -0400819}
820
Stefan Richter6e95dea2010-02-21 17:56:21 +0100821static int ioctl_send_response(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500822{
Stefan Richter6e95dea2010-02-21 17:56:21 +0100823 struct fw_cdev_send_response *a = &arg->send_response;
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400824 struct client_resource *resource;
Stefan Richter97c18b72009-01-04 16:23:29 +0100825 struct inbound_transaction_resource *r;
Stefan Richter7e44c0b2009-10-08 00:39:56 +0200826 int ret = 0;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500827
Stefan Richter6e95dea2010-02-21 17:56:21 +0100828 if (release_client_resource(client, a->handle,
Jay Fenlason45ee3192008-12-21 16:47:17 +0100829 release_request, &resource) < 0)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500830 return -EINVAL;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100831
Stefan Richter97c18b72009-01-04 16:23:29 +0100832 r = container_of(resource, struct inbound_transaction_resource,
833 resource);
Stefan Richter281e2032010-01-24 16:45:03 +0100834 if (is_fcp_request(r->request))
835 goto out;
836
Clemens Ladischa10c0ce72010-05-19 08:28:32 +0200837 if (a->length != fw_get_response_length(r->request)) {
838 ret = -EINVAL;
839 kfree(r->request);
840 goto out;
841 }
842 if (copy_from_user(r->data, u64_to_uptr(a->data), a->length)) {
Stefan Richter281e2032010-01-24 16:45:03 +0100843 ret = -EFAULT;
844 kfree(r->request);
845 goto out;
Stefan Richter7e44c0b2009-10-08 00:39:56 +0200846 }
Jay Fenlason08bd34c2010-05-18 14:02:45 -0400847 fw_send_response(r->card, r->request, a->rcode);
Stefan Richter7e44c0b2009-10-08 00:39:56 +0200848 out:
Stefan Richter0244f572010-06-20 22:52:27 +0200849 fw_card_put(r->card);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500850 kfree(r);
851
Stefan Richter7e44c0b2009-10-08 00:39:56 +0200852 return ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500853}
854
Stefan Richter6e95dea2010-02-21 17:56:21 +0100855static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg53718422007-03-07 12:12:42 -0500856{
Stefan Richter02d37be2010-07-08 16:09:06 +0200857 fw_schedule_bus_reset(client->device->card, true,
Stefan Richter6e95dea2010-02-21 17:56:21 +0100858 arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET);
Stefan Richter02d37be2010-07-08 16:09:06 +0200859 return 0;
Kristian Høgsberg53718422007-03-07 12:12:42 -0500860}
861
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400862static void release_descriptor(struct client *client,
863 struct client_resource *resource)
864{
Stefan Richter97c18b72009-01-04 16:23:29 +0100865 struct descriptor_resource *r =
866 container_of(resource, struct descriptor_resource, resource);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400867
Stefan Richter97c18b72009-01-04 16:23:29 +0100868 fw_core_remove_descriptor(&r->descriptor);
869 kfree(r);
Kristian Høgsberg3964a442007-03-27 01:43:41 -0400870}
871
Stefan Richter6e95dea2010-02-21 17:56:21 +0100872static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200873{
Stefan Richter6e95dea2010-02-21 17:56:21 +0100874 struct fw_cdev_add_descriptor *a = &arg->add_descriptor;
Stefan Richter97c18b72009-01-04 16:23:29 +0100875 struct descriptor_resource *r;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100876 int ret;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200877
Stefan Richterde487da2009-03-10 21:00:23 +0100878 /* Access policy: Allow this ioctl only on local nodes' device files. */
Stefan Richter92368892009-05-13 21:42:14 +0200879 if (!client->device->is_local)
Stefan Richterde487da2009-03-10 21:00:23 +0100880 return -ENOSYS;
881
Stefan Richter6e95dea2010-02-21 17:56:21 +0100882 if (a->length > 256)
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200883 return -EINVAL;
884
Stefan Richter6e95dea2010-02-21 17:56:21 +0100885 r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL);
Stefan Richter97c18b72009-01-04 16:23:29 +0100886 if (r == NULL)
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200887 return -ENOMEM;
888
Stefan Richter6e95dea2010-02-21 17:56:21 +0100889 if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) {
Jay Fenlason45ee3192008-12-21 16:47:17 +0100890 ret = -EFAULT;
891 goto failed;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200892 }
893
Stefan Richter6e95dea2010-02-21 17:56:21 +0100894 r->descriptor.length = a->length;
895 r->descriptor.immediate = a->immediate;
896 r->descriptor.key = a->key;
Stefan Richter97c18b72009-01-04 16:23:29 +0100897 r->descriptor.data = r->data;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200898
Stefan Richter97c18b72009-01-04 16:23:29 +0100899 ret = fw_core_add_descriptor(&r->descriptor);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100900 if (ret < 0)
901 goto failed;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200902
Stefan Richter97c18b72009-01-04 16:23:29 +0100903 r->resource.release = release_descriptor;
904 ret = add_client_resource(client, &r->resource, GFP_KERNEL);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100905 if (ret < 0) {
Stefan Richter97c18b72009-01-04 16:23:29 +0100906 fw_core_remove_descriptor(&r->descriptor);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100907 goto failed;
908 }
Stefan Richter6e95dea2010-02-21 17:56:21 +0100909 a->handle = r->resource.handle;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200910
911 return 0;
Jay Fenlason45ee3192008-12-21 16:47:17 +0100912 failed:
Stefan Richter97c18b72009-01-04 16:23:29 +0100913 kfree(r);
Jay Fenlason45ee3192008-12-21 16:47:17 +0100914
915 return ret;
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200916}
917
Stefan Richter6e95dea2010-02-21 17:56:21 +0100918static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200919{
Stefan Richter6e95dea2010-02-21 17:56:21 +0100920 return release_client_resource(client, arg->remove_descriptor.handle,
Jay Fenlason45ee3192008-12-21 16:47:17 +0100921 release_descriptor, NULL);
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +0200922}
923
Stefan Richter53dca512008-12-14 21:47:04 +0100924static void iso_callback(struct fw_iso_context *context, u32 cycle,
925 size_t header_length, void *header, void *data)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500926{
927 struct client *client = data;
Stefan Richter97c18b72009-01-04 16:23:29 +0100928 struct iso_interrupt_event *e;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500929
Stefan Richter56d04cb2010-06-08 00:20:10 +0200930 e = kmalloc(sizeof(*e) + header_length, GFP_ATOMIC);
Stefan Richtercfb0c9d2013-03-24 17:32:00 +0100931 if (e == NULL)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500932 return;
Stefan Richtercfb0c9d2013-03-24 17:32:00 +0100933
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);
Stefan Richtercfb0c9d2013-03-24 17:32:00 +0100950 if (e == NULL)
Stefan Richter872e3302010-07-29 18:19:22 +0200951 return;
Stefan Richtercfb0c9d2013-03-24 17:32:00 +0100952
Stefan Richter872e3302010-07-29 18:19:22 +0200953 e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL;
954 e->interrupt.closure = client->iso_closure;
955 e->interrupt.completed = fw_iso_buffer_lookup(&client->buffer,
956 completed);
957 queue_event(client, &e->event, &e->interrupt,
958 sizeof(e->interrupt), NULL, 0);
959}
960
Stefan Richter0b6c4852012-04-09 20:51:18 +0200961static enum dma_data_direction iso_dma_direction(struct fw_iso_context *context)
962{
963 if (context->type == FW_ISO_CONTEXT_TRANSMIT)
964 return DMA_TO_DEVICE;
965 else
966 return DMA_FROM_DEVICE;
967}
968
Stefan Richter6e95dea2010-02-21 17:56:21 +0100969static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500970{
Stefan Richter6e95dea2010-02-21 17:56:21 +0100971 struct fw_cdev_create_iso_context *a = &arg->create_iso_context;
Kristian Høgsberg24315c52007-06-20 17:48:07 -0400972 struct fw_iso_context *context;
Stefan Richter872e3302010-07-29 18:19:22 +0200973 fw_iso_callback_t cb;
Stefan Richter0b6c4852012-04-09 20:51:18 +0200974 int ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -0500975
Stefan Richtereb5b35a2010-07-07 14:13:14 +0200976 BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT != FW_ISO_CONTEXT_TRANSMIT ||
Stefan Richter872e3302010-07-29 18:19:22 +0200977 FW_CDEV_ISO_CONTEXT_RECEIVE != FW_ISO_CONTEXT_RECEIVE ||
978 FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL !=
979 FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL);
Kristian Høgsberg21efb3c2007-02-16 17:34:50 -0500980
Stefan Richter6e95dea2010-02-21 17:56:21 +0100981 switch (a->type) {
Stefan Richter872e3302010-07-29 18:19:22 +0200982 case FW_ISO_CONTEXT_TRANSMIT:
983 if (a->speed > SCODE_3200 || 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;
Kristian Høgsbergc70dc782007-03-14 17:34:53 -0400987 break;
988
Stefan Richter872e3302010-07-29 18:19:22 +0200989 case FW_ISO_CONTEXT_RECEIVE:
990 if (a->header_size < 4 || (a->header_size & 3) ||
991 a->channel > 63)
Kristian Høgsbergc70dc782007-03-14 17:34:53 -0400992 return -EINVAL;
Stefan Richter872e3302010-07-29 18:19:22 +0200993
994 cb = iso_callback;
995 break;
996
997 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
998 cb = (fw_iso_callback_t)iso_mc_callback;
Kristian Høgsbergc70dc782007-03-14 17:34:53 -0400999 break;
1000
1001 default:
Kristian Høgsberg21efb3c2007-02-16 17:34:50 -05001002 return -EINVAL;
Kristian Høgsbergc70dc782007-03-14 17:34:53 -04001003 }
1004
Stefan Richter6e95dea2010-02-21 17:56:21 +01001005 context = fw_iso_context_create(client->device->card, a->type,
Stefan Richter872e3302010-07-29 18:19:22 +02001006 a->channel, a->speed, a->header_size, cb, client);
Kristian Høgsberg24315c52007-06-20 17:48:07 -04001007 if (IS_ERR(context))
1008 return PTR_ERR(context);
Clemens Ladisch0699a732013-07-22 21:32:09 +02001009 if (client->version < FW_CDEV_VERSION_AUTO_FLUSH_ISO_OVERFLOW)
1010 context->drop_overflow_headers = true;
Kristian Høgsberg24315c52007-06-20 17:48:07 -04001011
Clemens Ladischbdfe2732010-06-14 11:46:25 +02001012 /* We only support one context at this time. */
1013 spin_lock_irq(&client->lock);
1014 if (client->iso_context != NULL) {
1015 spin_unlock_irq(&client->lock);
1016 fw_iso_context_destroy(context);
Stefan Richter0b6c4852012-04-09 20:51:18 +02001017
Clemens Ladischbdfe2732010-06-14 11:46:25 +02001018 return -EBUSY;
1019 }
Stefan Richter0b6c4852012-04-09 20:51:18 +02001020 if (!client->buffer_is_mapped) {
1021 ret = fw_iso_buffer_map_dma(&client->buffer,
1022 client->device->card,
1023 iso_dma_direction(context));
1024 if (ret < 0) {
1025 spin_unlock_irq(&client->lock);
1026 fw_iso_context_destroy(context);
1027
1028 return ret;
1029 }
1030 client->buffer_is_mapped = true;
1031 }
Stefan Richter6e95dea2010-02-21 17:56:21 +01001032 client->iso_closure = a->closure;
Kristian Høgsberg24315c52007-06-20 17:48:07 -04001033 client->iso_context = context;
Clemens Ladischbdfe2732010-06-14 11:46:25 +02001034 spin_unlock_irq(&client->lock);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001035
Stefan Richter6e95dea2010-02-21 17:56:21 +01001036 a->handle = 0;
Kristian Høgsbergabaa5742007-04-30 15:03:14 -04001037
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001038 return 0;
1039}
1040
Stefan Richter872e3302010-07-29 18:19:22 +02001041static int ioctl_set_iso_channels(struct client *client, union ioctl_arg *arg)
1042{
1043 struct fw_cdev_set_iso_channels *a = &arg->set_iso_channels;
1044 struct fw_iso_context *ctx = client->iso_context;
1045
1046 if (ctx == NULL || a->handle != 0)
1047 return -EINVAL;
1048
1049 return fw_iso_context_set_channels(ctx, &a->channels);
1050}
1051
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -04001052/* Macros for decoding the iso packet control header. */
1053#define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff)
1054#define GET_INTERRUPT(v) (((v) >> 16) & 0x01)
1055#define GET_SKIP(v) (((v) >> 17) & 0x01)
Stefan Richter7a100342008-09-12 18:09:55 +02001056#define GET_TAG(v) (((v) >> 18) & 0x03)
1057#define GET_SY(v) (((v) >> 20) & 0x0f)
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -04001058#define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff)
1059
Stefan Richter6e95dea2010-02-21 17:56:21 +01001060static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001061{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001062 struct fw_cdev_queue_iso *a = &arg->queue_iso;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001063 struct fw_cdev_iso_packet __user *p, *end, *next;
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -05001064 struct fw_iso_context *ctx = client->iso_context;
Stefan Richter872e3302010-07-29 18:19:22 +02001065 unsigned long payload, buffer_end, transmit_header_bytes = 0;
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -04001066 u32 control;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001067 int count;
1068 struct {
1069 struct fw_iso_packet packet;
1070 u8 header[256];
1071 } u;
1072
Stefan Richter6e95dea2010-02-21 17:56:21 +01001073 if (ctx == NULL || a->handle != 0)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001074 return -EINVAL;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001075
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001076 /*
1077 * If the user passes a non-NULL data pointer, has mmap()'ed
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001078 * the iso buffer, and the pointer points inside the buffer,
1079 * we setup the payload pointers accordingly. Otherwise we
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001080 * set them both to 0, which will still let packets with
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001081 * payload_length == 0 through. In other words, if no packets
1082 * use the indirect payload, the iso buffer need not be mapped
Stefan Richter6e95dea2010-02-21 17:56:21 +01001083 * and the a->data pointer is ignored.
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001084 */
Stefan Richter6e95dea2010-02-21 17:56:21 +01001085 payload = (unsigned long)a->data - client->vm_start;
Kristian Høgsbergef370ee2007-03-28 20:46:23 +02001086 buffer_end = client->buffer.page_count << PAGE_SHIFT;
Stefan Richter6e95dea2010-02-21 17:56:21 +01001087 if (a->data == 0 || client->buffer.pages == NULL ||
Kristian Høgsbergef370ee2007-03-28 20:46:23 +02001088 payload >= buffer_end) {
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001089 payload = 0;
Kristian Høgsbergef370ee2007-03-28 20:46:23 +02001090 buffer_end = 0;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001091 }
1092
Stefan Richter872e3302010-07-29 18:19:22 +02001093 if (ctx->type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL && payload & 3)
1094 return -EINVAL;
Al Viro1ccc9142007-10-14 19:34:40 +01001095
Stefan Richter872e3302010-07-29 18:19:22 +02001096 p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets);
Stefan Richter6e95dea2010-02-21 17:56:21 +01001097 if (!access_ok(VERIFY_READ, p, a->size))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001098 return -EFAULT;
1099
Stefan Richter6e95dea2010-02-21 17:56:21 +01001100 end = (void __user *)p + a->size;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001101 count = 0;
1102 while (p < end) {
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -04001103 if (get_user(control, &p->control))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001104 return -EFAULT;
Kristian Høgsberg1ca31ae2007-05-31 11:16:43 -04001105 u.packet.payload_length = GET_PAYLOAD_LENGTH(control);
1106 u.packet.interrupt = GET_INTERRUPT(control);
1107 u.packet.skip = GET_SKIP(control);
1108 u.packet.tag = GET_TAG(control);
1109 u.packet.sy = GET_SY(control);
1110 u.packet.header_length = GET_HEADER_LENGTH(control);
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05001111
Stefan Richter872e3302010-07-29 18:19:22 +02001112 switch (ctx->type) {
1113 case FW_ISO_CONTEXT_TRANSMIT:
1114 if (u.packet.header_length & 3)
Clemens Ladisch385ab5bc2010-03-31 16:26:46 +02001115 return -EINVAL;
Stefan Richterae2a97662010-07-29 09:31:56 +02001116 transmit_header_bytes = u.packet.header_length;
Stefan Richter872e3302010-07-29 18:19:22 +02001117 break;
1118
1119 case FW_ISO_CONTEXT_RECEIVE:
Stefan Richter69e61d02010-07-28 23:49:45 +02001120 if (u.packet.header_length == 0 ||
1121 u.packet.header_length % ctx->header_size != 0)
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05001122 return -EINVAL;
Stefan Richter872e3302010-07-29 18:19:22 +02001123 break;
1124
1125 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
1126 if (u.packet.payload_length == 0 ||
1127 u.packet.payload_length & 3)
1128 return -EINVAL;
1129 break;
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05001130 }
1131
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001132 next = (struct fw_cdev_iso_packet __user *)
Stefan Richterae2a97662010-07-29 09:31:56 +02001133 &p->header[transmit_header_bytes / 4];
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001134 if (next > end)
1135 return -EINVAL;
1136 if (__copy_from_user
Stefan Richterae2a97662010-07-29 09:31:56 +02001137 (u.packet.header, p->header, transmit_header_bytes))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001138 return -EFAULT;
Kristian Høgsberg98b6cbe2007-02-16 17:34:51 -05001139 if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT &&
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001140 u.packet.header_length + u.packet.payload_length > 0)
1141 return -EINVAL;
Kristian Høgsbergef370ee2007-03-28 20:46:23 +02001142 if (payload + u.packet.payload_length > buffer_end)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001143 return -EINVAL;
1144
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -05001145 if (fw_iso_context_queue(ctx, &u.packet,
1146 &client->buffer, payload))
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001147 break;
1148
1149 p = next;
1150 payload += u.packet.payload_length;
1151 count++;
1152 }
Clemens Ladisch13882a82011-05-02 09:33:56 +02001153 fw_iso_context_queue_flush(ctx);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001154
Stefan Richter6e95dea2010-02-21 17:56:21 +01001155 a->size -= uptr_to_u64(p) - a->packets;
1156 a->packets = uptr_to_u64(p);
1157 a->data = client->vm_start + payload;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001158
1159 return count;
1160}
1161
Stefan Richter6e95dea2010-02-21 17:56:21 +01001162static int ioctl_start_iso(struct client *client, union ioctl_arg *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001163{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001164 struct fw_cdev_start_iso *a = &arg->start_iso;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001165
Stefan Richtereb5b35a2010-07-07 14:13:14 +02001166 BUILD_BUG_ON(
1167 FW_CDEV_ISO_CONTEXT_MATCH_TAG0 != FW_ISO_CONTEXT_MATCH_TAG0 ||
1168 FW_CDEV_ISO_CONTEXT_MATCH_TAG1 != FW_ISO_CONTEXT_MATCH_TAG1 ||
1169 FW_CDEV_ISO_CONTEXT_MATCH_TAG2 != FW_ISO_CONTEXT_MATCH_TAG2 ||
1170 FW_CDEV_ISO_CONTEXT_MATCH_TAG3 != FW_ISO_CONTEXT_MATCH_TAG3 ||
1171 FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS != FW_ISO_CONTEXT_MATCH_ALL_TAGS);
1172
Stefan Richter6e95dea2010-02-21 17:56:21 +01001173 if (client->iso_context == NULL || a->handle != 0)
Kristian Høgsbergabaa5742007-04-30 15:03:14 -04001174 return -EINVAL;
Stefan Richterfae60312008-02-20 21:10:06 +01001175
Stefan Richter6e95dea2010-02-21 17:56:21 +01001176 if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE &&
1177 (a->tags == 0 || a->tags > 15 || a->sync > 15))
1178 return -EINVAL;
Kristian Høgsbergeb0306e2007-03-14 17:34:54 -04001179
Stefan Richter6e95dea2010-02-21 17:56:21 +01001180 return fw_iso_context_start(client->iso_context,
1181 a->cycle, a->sync, a->tags);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001182}
1183
Stefan Richter6e95dea2010-02-21 17:56:21 +01001184static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg)
Kristian Høgsbergb8295662007-02-16 17:34:42 -05001185{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001186 struct fw_cdev_stop_iso *a = &arg->stop_iso;
Kristian Høgsbergabaa5742007-04-30 15:03:14 -04001187
Stefan Richter6e95dea2010-02-21 17:56:21 +01001188 if (client->iso_context == NULL || a->handle != 0)
Kristian Høgsbergabaa5742007-04-30 15:03:14 -04001189 return -EINVAL;
1190
Kristian Høgsbergb8295662007-02-16 17:34:42 -05001191 return fw_iso_context_stop(client->iso_context);
1192}
1193
Clemens Ladischd1bbd202012-03-18 19:06:39 +01001194static int ioctl_flush_iso(struct client *client, union ioctl_arg *arg)
1195{
1196 struct fw_cdev_flush_iso *a = &arg->flush_iso;
1197
1198 if (client->iso_context == NULL || a->handle != 0)
1199 return -EINVAL;
1200
1201 return fw_iso_context_flush_completions(client->iso_context);
1202}
1203
Stefan Richter6e95dea2010-02-21 17:56:21 +01001204static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg)
Stefan Richtera64408b2007-09-29 10:41:58 +02001205{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001206 struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2;
Stefan Richtera64408b2007-09-29 10:41:58 +02001207 struct fw_card *card = client->device->card;
Stefan Richterabfe5a02010-02-20 12:13:49 +01001208 struct timespec ts = {0, 0};
Stefan Richter4a9bde92010-02-20 22:24:43 +01001209 u32 cycle_time;
Stefan Richterabfe5a02010-02-20 12:13:49 +01001210 int ret = 0;
Stefan Richtera64408b2007-09-29 10:41:58 +02001211
Stefan Richter4a9bde92010-02-20 22:24:43 +01001212 local_irq_disable();
Stefan Richtera64408b2007-09-29 10:41:58 +02001213
Stefan Richter0fcff4e2010-06-12 20:35:52 +02001214 cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME);
Stefan Richterabfe5a02010-02-20 12:13:49 +01001215
Stefan Richter6e95dea2010-02-21 17:56:21 +01001216 switch (a->clk_id) {
Thomas Gleixner889235c2014-06-11 23:59:16 +00001217 case CLOCK_REALTIME: getnstimeofday(&ts); break;
1218 case CLOCK_MONOTONIC: ktime_get_ts(&ts); break;
1219 case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts); break;
Stefan Richterabfe5a02010-02-20 12:13:49 +01001220 default:
1221 ret = -EINVAL;
1222 }
Stefan Richtera64408b2007-09-29 10:41:58 +02001223
Stefan Richter4a9bde92010-02-20 22:24:43 +01001224 local_irq_enable();
Stefan Richtera64408b2007-09-29 10:41:58 +02001225
Stefan Richter6e95dea2010-02-21 17:56:21 +01001226 a->tv_sec = ts.tv_sec;
1227 a->tv_nsec = ts.tv_nsec;
1228 a->cycle_timer = cycle_time;
Stefan Richterabfe5a02010-02-20 12:13:49 +01001229
1230 return ret;
1231}
1232
Stefan Richter6e95dea2010-02-21 17:56:21 +01001233static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg)
Stefan Richterabfe5a02010-02-20 12:13:49 +01001234{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001235 struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer;
Stefan Richterabfe5a02010-02-20 12:13:49 +01001236 struct fw_cdev_get_cycle_timer2 ct2;
1237
1238 ct2.clk_id = CLOCK_REALTIME;
Stefan Richter6e95dea2010-02-21 17:56:21 +01001239 ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2);
Stefan Richterabfe5a02010-02-20 12:13:49 +01001240
Stefan Richter6e95dea2010-02-21 17:56:21 +01001241 a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC;
1242 a->cycle_timer = ct2.cycle_timer;
Stefan Richter4a9bde92010-02-20 22:24:43 +01001243
Stefan Richtera64408b2007-09-29 10:41:58 +02001244 return 0;
1245}
1246
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001247static void iso_resource_work(struct work_struct *work)
1248{
1249 struct iso_resource_event *e;
1250 struct iso_resource *r =
1251 container_of(work, struct iso_resource, work.work);
1252 struct client *client = r->client;
1253 int generation, channel, bandwidth, todo;
1254 bool skip, free, success;
1255
1256 spin_lock_irq(&client->lock);
1257 generation = client->device->generation;
1258 todo = r->todo;
1259 /* Allow 1000ms grace period for other reallocations. */
1260 if (todo == ISO_RES_ALLOC &&
Clemens Ladische71084a2011-01-22 15:05:03 +01001261 time_before64(get_jiffies_64(),
1262 client->device->card->reset_jiffies + HZ)) {
Stefan Richter9fb551b2009-10-08 00:41:10 +02001263 schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3));
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001264 skip = true;
1265 } else {
1266 /* We could be called twice within the same generation. */
1267 skip = todo == ISO_RES_REALLOC &&
1268 r->generation == generation;
1269 }
Stefan Richter1ec3c022009-01-04 16:23:29 +01001270 free = todo == ISO_RES_DEALLOC ||
1271 todo == ISO_RES_ALLOC_ONCE ||
1272 todo == ISO_RES_DEALLOC_ONCE;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001273 r->generation = generation;
1274 spin_unlock_irq(&client->lock);
1275
1276 if (skip)
1277 goto out;
1278
1279 bandwidth = r->bandwidth;
1280
1281 fw_iso_resource_manage(client->device->card, generation,
1282 r->channels, &channel, &bandwidth,
Stefan Richter1ec3c022009-01-04 16:23:29 +01001283 todo == ISO_RES_ALLOC ||
1284 todo == ISO_RES_REALLOC ||
Stefan Richterf30e6d32011-04-22 15:13:54 +02001285 todo == ISO_RES_ALLOC_ONCE);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001286 /*
1287 * Is this generation outdated already? As long as this resource sticks
1288 * in the idr, it will be scheduled again for a newer generation or at
1289 * shutdown.
1290 */
1291 if (channel == -EAGAIN &&
1292 (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC))
1293 goto out;
1294
1295 success = channel >= 0 || bandwidth > 0;
1296
1297 spin_lock_irq(&client->lock);
1298 /*
1299 * Transit from allocation to reallocation, except if the client
1300 * requested deallocation in the meantime.
1301 */
1302 if (r->todo == ISO_RES_ALLOC)
1303 r->todo = ISO_RES_REALLOC;
1304 /*
1305 * Allocation or reallocation failure? Pull this resource out of the
1306 * idr and prepare for deletion, unless the client is shutting down.
1307 */
1308 if (r->todo == ISO_RES_REALLOC && !success &&
1309 !client->in_shutdown &&
1310 idr_find(&client->resource_idr, r->resource.handle)) {
1311 idr_remove(&client->resource_idr, r->resource.handle);
1312 client_put(client);
1313 free = true;
1314 }
1315 spin_unlock_irq(&client->lock);
1316
1317 if (todo == ISO_RES_ALLOC && channel >= 0)
Stefan Richter5d9cb7d272009-01-08 23:07:40 +01001318 r->channels = 1ULL << channel;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001319
1320 if (todo == ISO_RES_REALLOC && success)
1321 goto out;
1322
Stefan Richter1ec3c022009-01-04 16:23:29 +01001323 if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) {
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001324 e = r->e_alloc;
1325 r->e_alloc = NULL;
1326 } else {
1327 e = r->e_dealloc;
1328 r->e_dealloc = NULL;
1329 }
Stefan Richtere21fcf72009-10-08 00:41:38 +02001330 e->iso_resource.handle = r->resource.handle;
1331 e->iso_resource.channel = channel;
1332 e->iso_resource.bandwidth = bandwidth;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001333
1334 queue_event(client, &e->event,
Stefan Richtere21fcf72009-10-08 00:41:38 +02001335 &e->iso_resource, sizeof(e->iso_resource), NULL, 0);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001336
1337 if (free) {
1338 cancel_delayed_work(&r->work);
1339 kfree(r->e_alloc);
1340 kfree(r->e_dealloc);
1341 kfree(r);
1342 }
1343 out:
1344 client_put(client);
1345}
1346
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001347static void release_iso_resource(struct client *client,
1348 struct client_resource *resource)
1349{
1350 struct iso_resource *r =
1351 container_of(resource, struct iso_resource, resource);
1352
1353 spin_lock_irq(&client->lock);
1354 r->todo = ISO_RES_DEALLOC;
Stefan Richter9fb551b2009-10-08 00:41:10 +02001355 schedule_iso_resource(r, 0);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001356 spin_unlock_irq(&client->lock);
1357}
1358
Stefan Richter1ec3c022009-01-04 16:23:29 +01001359static int init_iso_resource(struct client *client,
1360 struct fw_cdev_allocate_iso_resource *request, int todo)
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001361{
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001362 struct iso_resource_event *e1, *e2;
1363 struct iso_resource *r;
1364 int ret;
1365
1366 if ((request->channels == 0 && request->bandwidth == 0) ||
Stefan Richterbdabfa52013-03-24 17:31:09 +01001367 request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL)
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001368 return -EINVAL;
1369
1370 r = kmalloc(sizeof(*r), GFP_KERNEL);
1371 e1 = kmalloc(sizeof(*e1), GFP_KERNEL);
1372 e2 = kmalloc(sizeof(*e2), GFP_KERNEL);
1373 if (r == NULL || e1 == NULL || e2 == NULL) {
1374 ret = -ENOMEM;
1375 goto fail;
1376 }
1377
1378 INIT_DELAYED_WORK(&r->work, iso_resource_work);
1379 r->client = client;
Stefan Richter1ec3c022009-01-04 16:23:29 +01001380 r->todo = todo;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001381 r->generation = -1;
1382 r->channels = request->channels;
1383 r->bandwidth = request->bandwidth;
1384 r->e_alloc = e1;
1385 r->e_dealloc = e2;
1386
Stefan Richtere21fcf72009-10-08 00:41:38 +02001387 e1->iso_resource.closure = request->closure;
1388 e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED;
1389 e2->iso_resource.closure = request->closure;
1390 e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED;
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001391
Stefan Richter1ec3c022009-01-04 16:23:29 +01001392 if (todo == ISO_RES_ALLOC) {
1393 r->resource.release = release_iso_resource;
1394 ret = add_client_resource(client, &r->resource, GFP_KERNEL);
Stefan Richter81610b82009-01-11 13:44:46 +01001395 if (ret < 0)
1396 goto fail;
Stefan Richter1ec3c022009-01-04 16:23:29 +01001397 } else {
1398 r->resource.release = NULL;
1399 r->resource.handle = -1;
Stefan Richter9fb551b2009-10-08 00:41:10 +02001400 schedule_iso_resource(r, 0);
Stefan Richter1ec3c022009-01-04 16:23:29 +01001401 }
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001402 request->handle = r->resource.handle;
1403
1404 return 0;
1405 fail:
1406 kfree(r);
1407 kfree(e1);
1408 kfree(e2);
1409
1410 return ret;
1411}
1412
Stefan Richter6e95dea2010-02-21 17:56:21 +01001413static int ioctl_allocate_iso_resource(struct client *client,
1414 union ioctl_arg *arg)
Stefan Richter1ec3c022009-01-04 16:23:29 +01001415{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001416 return init_iso_resource(client,
1417 &arg->allocate_iso_resource, ISO_RES_ALLOC);
Stefan Richter1ec3c022009-01-04 16:23:29 +01001418}
1419
Stefan Richter6e95dea2010-02-21 17:56:21 +01001420static int ioctl_deallocate_iso_resource(struct client *client,
1421 union ioctl_arg *arg)
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001422{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001423 return release_client_resource(client,
1424 arg->deallocate.handle, release_iso_resource, NULL);
Jay Fenlason, Stefan Richterb1bda4c2009-01-04 16:23:29 +01001425}
1426
Stefan Richter6e95dea2010-02-21 17:56:21 +01001427static int ioctl_allocate_iso_resource_once(struct client *client,
1428 union ioctl_arg *arg)
Stefan Richter1ec3c022009-01-04 16:23:29 +01001429{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001430 return init_iso_resource(client,
1431 &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE);
Stefan Richter1ec3c022009-01-04 16:23:29 +01001432}
1433
Stefan Richter6e95dea2010-02-21 17:56:21 +01001434static int ioctl_deallocate_iso_resource_once(struct client *client,
1435 union ioctl_arg *arg)
Stefan Richter1ec3c022009-01-04 16:23:29 +01001436{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001437 return init_iso_resource(client,
1438 &arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE);
Stefan Richter1ec3c022009-01-04 16:23:29 +01001439}
1440
Stefan Richterc8a25902009-03-10 20:59:16 +01001441/*
1442 * Returns a speed code: Maximum speed to or from this device,
1443 * limited by the device's link speed, the local node's link speed,
1444 * and all PHY port speeds between the two links.
1445 */
Stefan Richter6e95dea2010-02-21 17:56:21 +01001446static int ioctl_get_speed(struct client *client, union ioctl_arg *arg)
Stefan Richter33580a32009-01-04 16:23:29 +01001447{
Stefan Richterc8a25902009-03-10 20:59:16 +01001448 return client->device->max_speed;
Stefan Richter33580a32009-01-04 16:23:29 +01001449}
1450
Stefan Richter6e95dea2010-02-21 17:56:21 +01001451static int ioctl_send_broadcast_request(struct client *client,
1452 union ioctl_arg *arg)
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +01001453{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001454 struct fw_cdev_send_request *a = &arg->send_request;
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +01001455
Stefan Richter6e95dea2010-02-21 17:56:21 +01001456 switch (a->tcode) {
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +01001457 case TCODE_WRITE_QUADLET_REQUEST:
1458 case TCODE_WRITE_BLOCK_REQUEST:
1459 break;
1460 default:
1461 return -EINVAL;
1462 }
1463
Stefan Richter1566f3d2009-01-04 16:23:29 +01001464 /* Security policy: Only allow accesses to Units Space. */
Stefan Richter6e95dea2010-02-21 17:56:21 +01001465 if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END)
Stefan Richter1566f3d2009-01-04 16:23:29 +01001466 return -EACCES;
1467
Stefan Richter6e95dea2010-02-21 17:56:21 +01001468 return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100);
Jay Fenlason, Stefan Richteracfe8332009-01-04 16:23:29 +01001469}
1470
Stefan Richter6e95dea2010-02-21 17:56:21 +01001471static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg)
Jay Fenlasonf8c22872009-03-05 19:08:40 +01001472{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001473 struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet;
Stefan Richter18e9b102009-03-10 21:02:21 +01001474 struct fw_cdev_send_request request;
1475 int dest;
Jay Fenlasonf8c22872009-03-05 19:08:40 +01001476
Stefan Richter6e95dea2010-02-21 17:56:21 +01001477 if (a->speed > client->device->card->link_speed ||
1478 a->length > 1024 << a->speed)
Stefan Richter18e9b102009-03-10 21:02:21 +01001479 return -EIO;
Jay Fenlasonf8c22872009-03-05 19:08:40 +01001480
Stefan Richter6e95dea2010-02-21 17:56:21 +01001481 if (a->tag > 3 || a->channel > 63 || a->sy > 15)
Stefan Richter18e9b102009-03-10 21:02:21 +01001482 return -EINVAL;
1483
Stefan Richter6e95dea2010-02-21 17:56:21 +01001484 dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy);
Stefan Richter18e9b102009-03-10 21:02:21 +01001485 request.tcode = TCODE_STREAM_DATA;
Stefan Richter6e95dea2010-02-21 17:56:21 +01001486 request.length = a->length;
1487 request.closure = a->closure;
1488 request.data = a->data;
1489 request.generation = a->generation;
Stefan Richter18e9b102009-03-10 21:02:21 +01001490
Stefan Richter6e95dea2010-02-21 17:56:21 +01001491 return init_request(client, &request, dest, a->speed);
Jay Fenlasonf8c22872009-03-05 19:08:40 +01001492}
1493
Stefan Richter850bb6f2010-07-16 22:25:14 +02001494static void outbound_phy_packet_callback(struct fw_packet *packet,
1495 struct fw_card *card, int status)
1496{
1497 struct outbound_phy_packet_event *e =
1498 container_of(packet, struct outbound_phy_packet_event, p);
1499
1500 switch (status) {
1501 /* expected: */
1502 case ACK_COMPLETE: e->phy_packet.rcode = RCODE_COMPLETE; break;
1503 /* should never happen with PHY packets: */
1504 case ACK_PENDING: e->phy_packet.rcode = RCODE_COMPLETE; break;
1505 case ACK_BUSY_X:
1506 case ACK_BUSY_A:
1507 case ACK_BUSY_B: e->phy_packet.rcode = RCODE_BUSY; break;
1508 case ACK_DATA_ERROR: e->phy_packet.rcode = RCODE_DATA_ERROR; break;
1509 case ACK_TYPE_ERROR: e->phy_packet.rcode = RCODE_TYPE_ERROR; break;
1510 /* stale generation; cancelled; on certain controllers: no ack */
1511 default: e->phy_packet.rcode = status; break;
1512 }
Stefan Richtercc550212010-07-18 13:00:50 +02001513 e->phy_packet.data[0] = packet->timestamp;
Stefan Richter850bb6f2010-07-16 22:25:14 +02001514
Stefan Richtercc550212010-07-18 13:00:50 +02001515 queue_event(e->client, &e->event, &e->phy_packet,
1516 sizeof(e->phy_packet) + e->phy_packet.length, NULL, 0);
Stefan Richter850bb6f2010-07-16 22:25:14 +02001517 client_put(e->client);
1518}
1519
1520static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg)
1521{
1522 struct fw_cdev_send_phy_packet *a = &arg->send_phy_packet;
1523 struct fw_card *card = client->device->card;
1524 struct outbound_phy_packet_event *e;
1525
1526 /* Access policy: Allow this ioctl only on local nodes' device files. */
1527 if (!client->device->is_local)
1528 return -ENOSYS;
1529
Stefan Richtercc550212010-07-18 13:00:50 +02001530 e = kzalloc(sizeof(*e) + 4, GFP_KERNEL);
Stefan Richter850bb6f2010-07-16 22:25:14 +02001531 if (e == NULL)
1532 return -ENOMEM;
1533
1534 client_get(client);
1535 e->client = client;
1536 e->p.speed = SCODE_100;
1537 e->p.generation = a->generation;
Clemens Ladisch5b06db12010-11-30 08:24:47 +01001538 e->p.header[0] = TCODE_LINK_INTERNAL << 4;
1539 e->p.header[1] = a->data[0];
1540 e->p.header[2] = a->data[1];
1541 e->p.header_length = 12;
Stefan Richter850bb6f2010-07-16 22:25:14 +02001542 e->p.callback = outbound_phy_packet_callback;
1543 e->phy_packet.closure = a->closure;
1544 e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_SENT;
Stefan Richtercc550212010-07-18 13:00:50 +02001545 if (is_ping_packet(a->data))
1546 e->phy_packet.length = 4;
Stefan Richter850bb6f2010-07-16 22:25:14 +02001547
1548 card->driver->send_request(card, &e->p);
1549
1550 return 0;
1551}
1552
Stefan Richterbf54e142010-07-16 22:25:51 +02001553static int ioctl_receive_phy_packets(struct client *client, union ioctl_arg *arg)
1554{
1555 struct fw_cdev_receive_phy_packets *a = &arg->receive_phy_packets;
1556 struct fw_card *card = client->device->card;
1557
1558 /* Access policy: Allow this ioctl only on local nodes' device files. */
1559 if (!client->device->is_local)
1560 return -ENOSYS;
1561
1562 spin_lock_irq(&card->lock);
1563
1564 list_move_tail(&client->phy_receiver_link, &card->phy_receiver_list);
1565 client->phy_receiver_closure = a->closure;
1566
1567 spin_unlock_irq(&card->lock);
1568
1569 return 0;
1570}
1571
1572void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p)
1573{
1574 struct client *client;
1575 struct inbound_phy_packet_event *e;
1576 unsigned long flags;
1577
1578 spin_lock_irqsave(&card->lock, flags);
1579
1580 list_for_each_entry(client, &card->phy_receiver_list, phy_receiver_link) {
1581 e = kmalloc(sizeof(*e) + 8, GFP_ATOMIC);
Stefan Richtercfb0c9d2013-03-24 17:32:00 +01001582 if (e == NULL)
Stefan Richterbf54e142010-07-16 22:25:51 +02001583 break;
Stefan Richtercfb0c9d2013-03-24 17:32:00 +01001584
Stefan Richterbf54e142010-07-16 22:25:51 +02001585 e->phy_packet.closure = client->phy_receiver_closure;
1586 e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_RECEIVED;
1587 e->phy_packet.rcode = RCODE_COMPLETE;
1588 e->phy_packet.length = 8;
1589 e->phy_packet.data[0] = p->header[1];
1590 e->phy_packet.data[1] = p->header[2];
1591 queue_event(client, &e->event,
1592 &e->phy_packet, sizeof(e->phy_packet) + 8, NULL, 0);
1593 }
1594
1595 spin_unlock_irqrestore(&card->lock, flags);
1596}
1597
Stefan Richter6e95dea2010-02-21 17:56:21 +01001598static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = {
Stefan Richterb9dc61cf2010-07-16 22:24:29 +02001599 [0x00] = ioctl_get_info,
1600 [0x01] = ioctl_send_request,
1601 [0x02] = ioctl_allocate,
1602 [0x03] = ioctl_deallocate,
1603 [0x04] = ioctl_send_response,
1604 [0x05] = ioctl_initiate_bus_reset,
1605 [0x06] = ioctl_add_descriptor,
1606 [0x07] = ioctl_remove_descriptor,
1607 [0x08] = ioctl_create_iso_context,
1608 [0x09] = ioctl_queue_iso,
1609 [0x0a] = ioctl_start_iso,
1610 [0x0b] = ioctl_stop_iso,
1611 [0x0c] = ioctl_get_cycle_timer,
1612 [0x0d] = ioctl_allocate_iso_resource,
1613 [0x0e] = ioctl_deallocate_iso_resource,
1614 [0x0f] = ioctl_allocate_iso_resource_once,
1615 [0x10] = ioctl_deallocate_iso_resource_once,
1616 [0x11] = ioctl_get_speed,
1617 [0x12] = ioctl_send_broadcast_request,
1618 [0x13] = ioctl_send_stream_packet,
1619 [0x14] = ioctl_get_cycle_timer2,
Stefan Richter850bb6f2010-07-16 22:25:14 +02001620 [0x15] = ioctl_send_phy_packet,
Stefan Richterbf54e142010-07-16 22:25:51 +02001621 [0x16] = ioctl_receive_phy_packets,
Stefan Richter872e3302010-07-29 18:19:22 +02001622 [0x17] = ioctl_set_iso_channels,
Clemens Ladischd1bbd202012-03-18 19:06:39 +01001623 [0x18] = ioctl_flush_iso,
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001624};
1625
Stefan Richter53dca512008-12-14 21:47:04 +01001626static int dispatch_ioctl(struct client *client,
1627 unsigned int cmd, void __user *arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001628{
Stefan Richter6e95dea2010-02-21 17:56:21 +01001629 union ioctl_arg buffer;
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001630 int ret;
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001631
Stefan Richter64582292010-02-21 17:56:42 +01001632 if (fw_device_is_shutdown(client->device))
1633 return -ENODEV;
1634
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001635 if (_IOC_TYPE(cmd) != '#' ||
Stefan Richter9cac00b2010-04-07 08:30:50 +02001636 _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) ||
1637 _IOC_SIZE(cmd) > sizeof(buffer))
Stefan Richterd873d792011-07-09 16:42:26 +02001638 return -ENOTTY;
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001639
Stefan Richtereaca2d82014-11-11 17:16:44 +01001640 memset(&buffer, 0, sizeof(buffer));
Stefan Richter9cac00b2010-04-07 08:30:50 +02001641
1642 if (_IOC_DIR(cmd) & _IOC_WRITE)
1643 if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd)))
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001644 return -EFAULT;
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001645
Stefan Richter6e95dea2010-02-21 17:56:21 +01001646 ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer);
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001647 if (ret < 0)
1648 return ret;
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001649
Stefan Richter9cac00b2010-04-07 08:30:50 +02001650 if (_IOC_DIR(cmd) & _IOC_READ)
1651 if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd)))
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001652 return -EFAULT;
Kristian Høgsberg4f259222007-04-30 15:03:13 -04001653
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001654 return ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001655}
1656
Stefan Richter53dca512008-12-14 21:47:04 +01001657static long fw_device_op_ioctl(struct file *file,
1658 unsigned int cmd, unsigned long arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001659{
Stefan Richter64582292010-02-21 17:56:42 +01001660 return dispatch_ioctl(file->private_data, cmd, (void __user *)arg);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001661}
1662
1663#ifdef CONFIG_COMPAT
Stefan Richter53dca512008-12-14 21:47:04 +01001664static long fw_device_op_compat_ioctl(struct file *file,
1665 unsigned int cmd, unsigned long arg)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001666{
Stefan Richter64582292010-02-21 17:56:42 +01001667 return dispatch_ioctl(file->private_data, cmd, compat_ptr(arg));
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001668}
1669#endif
1670
1671static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma)
1672{
1673 struct client *client = file->private_data;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001674 unsigned long size;
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001675 int page_count, ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001676
Jay Fenlason551f4cb2008-05-16 11:15:23 -04001677 if (fw_device_is_shutdown(client->device))
1678 return -ENODEV;
1679
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001680 /* FIXME: We could support multiple buffers, but we don't. */
1681 if (client->buffer.pages != NULL)
1682 return -EBUSY;
1683
1684 if (!(vma->vm_flags & VM_SHARED))
1685 return -EINVAL;
1686
1687 if (vma->vm_start & ~PAGE_MASK)
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001688 return -EINVAL;
1689
1690 client->vm_start = vma->vm_start;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001691 size = vma->vm_end - vma->vm_start;
1692 page_count = size >> PAGE_SHIFT;
1693 if (size & ~PAGE_MASK)
1694 return -EINVAL;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001695
Stefan Richter0b6c4852012-04-09 20:51:18 +02001696 ret = fw_iso_buffer_alloc(&client->buffer, page_count);
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001697 if (ret < 0)
1698 return ret;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001699
Stefan Richter0b6c4852012-04-09 20:51:18 +02001700 spin_lock_irq(&client->lock);
1701 if (client->iso_context) {
1702 ret = fw_iso_buffer_map_dma(&client->buffer,
1703 client->device->card,
1704 iso_dma_direction(client->iso_context));
1705 client->buffer_is_mapped = (ret == 0);
1706 }
1707 spin_unlock_irq(&client->lock);
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001708 if (ret < 0)
Stefan Richter0b6c4852012-04-09 20:51:18 +02001709 goto fail;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05001710
Stefan Richter0b6c4852012-04-09 20:51:18 +02001711 ret = fw_iso_buffer_map_vma(&client->buffer, vma);
1712 if (ret < 0)
1713 goto fail;
1714
1715 return 0;
1716 fail:
1717 fw_iso_buffer_destroy(&client->buffer, client->device->card);
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001718 return ret;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001719}
1720
Clemens Ladisch5a5e62d2011-01-10 17:28:39 +01001721static int is_outbound_transaction_resource(int id, void *p, void *data)
1722{
1723 struct client_resource *resource = p;
1724
1725 return resource->release == release_transaction;
1726}
1727
1728static int has_outbound_transactions(struct client *client)
1729{
1730 int ret;
1731
1732 spin_lock_irq(&client->lock);
1733 ret = idr_for_each(&client->resource_idr,
1734 is_outbound_transaction_resource, NULL);
1735 spin_unlock_irq(&client->lock);
1736
1737 return ret;
1738}
1739
Jay Fenlason45ee3192008-12-21 16:47:17 +01001740static int shutdown_resource(int id, void *p, void *data)
1741{
Stefan Richtere21fcf72009-10-08 00:41:38 +02001742 struct client_resource *resource = p;
Jay Fenlason45ee3192008-12-21 16:47:17 +01001743 struct client *client = data;
1744
Stefan Richtere21fcf72009-10-08 00:41:38 +02001745 resource->release(client, resource);
Stefan Richterfb443032009-01-04 16:23:29 +01001746 client_put(client);
Jay Fenlason45ee3192008-12-21 16:47:17 +01001747
1748 return 0;
1749}
1750
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001751static int fw_device_op_release(struct inode *inode, struct file *file)
1752{
1753 struct client *client = file->private_data;
Stefan Richtere21fcf72009-10-08 00:41:38 +02001754 struct event *event, *next_event;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001755
Stefan Richterbf54e142010-07-16 22:25:51 +02001756 spin_lock_irq(&client->device->card->lock);
1757 list_del(&client->phy_receiver_link);
1758 spin_unlock_irq(&client->device->card->lock);
1759
Stefan Richter97811e32008-12-14 19:19:23 +01001760 mutex_lock(&client->device->client_list_mutex);
1761 list_del(&client->link);
1762 mutex_unlock(&client->device->client_list_mutex);
1763
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001764 if (client->iso_context)
1765 fw_iso_context_destroy(client->iso_context);
1766
Stefan Richter36a755c2009-01-05 20:28:10 +01001767 if (client->buffer.pages)
1768 fw_iso_buffer_destroy(&client->buffer, client->device->card);
1769
Jay Fenlason45ee3192008-12-21 16:47:17 +01001770 /* Freeze client->resource_idr and client->event_list */
Stefan Richter3ba94982009-01-04 16:23:29 +01001771 spin_lock_irq(&client->lock);
Jay Fenlason45ee3192008-12-21 16:47:17 +01001772 client->in_shutdown = true;
Stefan Richter3ba94982009-01-04 16:23:29 +01001773 spin_unlock_irq(&client->lock);
Kristian Høgsberg66dea3e2007-03-28 21:26:42 +02001774
Clemens Ladisch5a5e62d2011-01-10 17:28:39 +01001775 wait_event(client->tx_flush_wait, !has_outbound_transactions(client));
1776
Jay Fenlason45ee3192008-12-21 16:47:17 +01001777 idr_for_each(&client->resource_idr, shutdown_resource, client);
Jay Fenlason45ee3192008-12-21 16:47:17 +01001778 idr_destroy(&client->resource_idr);
Kristian Høgsberg28cf6a02007-03-07 12:12:50 -05001779
Stefan Richtere21fcf72009-10-08 00:41:38 +02001780 list_for_each_entry_safe(event, next_event, &client->event_list, link)
1781 kfree(event);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001782
Stefan Richterfb443032009-01-04 16:23:29 +01001783 client_put(client);
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001784
1785 return 0;
1786}
1787
1788static unsigned int fw_device_op_poll(struct file *file, poll_table * pt)
1789{
1790 struct client *client = file->private_data;
Kristian Høgsberg2603bf22007-03-07 12:12:48 -05001791 unsigned int mask = 0;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001792
1793 poll_wait(file, &client->wait, pt);
1794
Kristian Høgsberg2603bf22007-03-07 12:12:48 -05001795 if (fw_device_is_shutdown(client->device))
1796 mask |= POLLHUP | POLLERR;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001797 if (!list_empty(&client->event_list))
Kristian Høgsberg2603bf22007-03-07 12:12:48 -05001798 mask |= POLLIN | POLLRDNORM;
1799
1800 return mask;
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001801}
1802
Stefan Richter21ebcd12007-01-14 15:29:07 +01001803const struct file_operations fw_device_ops = {
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001804 .owner = THIS_MODULE,
Stefan Richter3ac26b22010-04-10 16:38:05 +01001805 .llseek = no_llseek,
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001806 .open = fw_device_op_open,
1807 .read = fw_device_op_read,
1808 .unlocked_ioctl = fw_device_op_ioctl,
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001809 .mmap = fw_device_op_mmap,
Stefan Richter3ac26b22010-04-10 16:38:05 +01001810 .release = fw_device_op_release,
1811 .poll = fw_device_op_poll,
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001812#ifdef CONFIG_COMPAT
Stefan Richter5af4e5e2007-01-21 20:45:32 +01001813 .compat_ioctl = fw_device_op_compat_ioctl,
Kristian Høgsberg19a15b92006-12-19 19:58:31 -05001814#endif
1815};