2006-12-19 17:58:31 -07:00
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/* -*- c-basic-offset: 8 -*-
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*
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* fw-device-cdev.c - Char device for device raw access
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*
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* Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/wait.h>
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#include <linux/errno.h>
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#include <linux/device.h>
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#include <linux/vmalloc.h>
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#include <linux/poll.h>
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#include <linux/delay.h>
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#include <linux/mm.h>
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2007-03-07 10:12:44 -07:00
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#include <linux/idr.h>
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2006-12-19 17:58:31 -07:00
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#include <linux/compat.h>
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#include <asm/uaccess.h>
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#include "fw-transaction.h"
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#include "fw-topology.h"
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#include "fw-device.h"
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#include "fw-device-cdev.h"
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/*
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* todo
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*
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* - bus resets sends a new packet with new generation and node id
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*
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*/
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/* dequeue_event() just kfree()'s the event, so the event has to be
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* the first field in the struct. */
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struct event {
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struct { void *data; size_t size; } v[2];
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struct list_head link;
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};
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2007-03-07 10:12:41 -07:00
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struct bus_reset {
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struct event event;
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struct fw_cdev_event_bus_reset reset;
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};
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2006-12-19 17:58:31 -07:00
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struct response {
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struct event event;
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struct fw_transaction transaction;
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struct client *client;
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2007-03-07 10:12:50 -07:00
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struct list_head link;
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2006-12-19 17:58:31 -07:00
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struct fw_cdev_event_response response;
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};
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struct iso_interrupt {
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struct event event;
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struct fw_cdev_event_iso_interrupt interrupt;
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};
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struct client {
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2007-03-07 10:12:43 -07:00
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u32 version;
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2006-12-19 17:58:31 -07:00
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struct fw_device *device;
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spinlock_t lock;
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struct list_head handler_list;
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struct list_head request_list;
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2007-03-07 10:12:50 -07:00
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struct list_head transaction_list;
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2006-12-19 17:58:31 -07:00
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u32 request_serial;
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struct list_head event_list;
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wait_queue_head_t wait;
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2007-03-26 22:43:39 -07:00
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u64 bus_reset_closure;
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2007-02-16 15:34:38 -07:00
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2006-12-19 17:58:31 -07:00
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struct fw_iso_context *iso_context;
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2007-02-16 15:34:38 -07:00
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struct fw_iso_buffer buffer;
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unsigned long vm_start;
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2007-03-07 10:12:41 -07:00
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struct list_head link;
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2006-12-19 17:58:31 -07:00
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};
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static inline void __user *
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u64_to_uptr(__u64 value)
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{
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return (void __user *)(unsigned long)value;
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}
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static inline __u64
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uptr_to_u64(void __user *ptr)
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{
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return (__u64)(unsigned long)ptr;
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}
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static int fw_device_op_open(struct inode *inode, struct file *file)
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{
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struct fw_device *device;
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struct client *client;
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2007-03-07 10:12:41 -07:00
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unsigned long flags;
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2006-12-19 17:58:31 -07:00
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2007-03-07 10:12:44 -07:00
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device = fw_device_from_devt(inode->i_rdev);
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if (device == NULL)
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return -ENODEV;
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2006-12-19 17:58:31 -07:00
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client = kzalloc(sizeof *client, GFP_KERNEL);
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if (client == NULL)
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return -ENOMEM;
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client->device = fw_device_get(device);
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INIT_LIST_HEAD(&client->event_list);
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INIT_LIST_HEAD(&client->handler_list);
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INIT_LIST_HEAD(&client->request_list);
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2007-03-07 10:12:50 -07:00
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INIT_LIST_HEAD(&client->transaction_list);
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2006-12-19 17:58:31 -07:00
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spin_lock_init(&client->lock);
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init_waitqueue_head(&client->wait);
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file->private_data = client;
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2007-03-07 10:12:41 -07:00
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spin_lock_irqsave(&device->card->lock, flags);
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list_add_tail(&client->link, &device->client_list);
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spin_unlock_irqrestore(&device->card->lock, flags);
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2006-12-19 17:58:31 -07:00
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return 0;
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}
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static void queue_event(struct client *client, struct event *event,
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void *data0, size_t size0, void *data1, size_t size1)
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{
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unsigned long flags;
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event->v[0].data = data0;
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event->v[0].size = size0;
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event->v[1].data = data1;
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event->v[1].size = size1;
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spin_lock_irqsave(&client->lock, flags);
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list_add_tail(&event->link, &client->event_list);
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wake_up_interruptible(&client->wait);
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spin_unlock_irqrestore(&client->lock, flags);
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}
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2007-03-07 10:12:48 -07:00
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static int
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dequeue_event(struct client *client, char __user *buffer, size_t count)
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2006-12-19 17:58:31 -07:00
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{
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unsigned long flags;
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struct event *event;
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size_t size, total;
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2007-03-07 10:12:48 -07:00
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int i, retval;
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2006-12-19 17:58:31 -07:00
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2007-03-07 10:12:48 -07:00
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retval = wait_event_interruptible(client->wait,
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!list_empty(&client->event_list) ||
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fw_device_is_shutdown(client->device));
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if (retval < 0)
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return retval;
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2006-12-19 17:58:31 -07:00
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2007-03-07 10:12:48 -07:00
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if (list_empty(&client->event_list) &&
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fw_device_is_shutdown(client->device))
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return -ENODEV;
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2006-12-19 17:58:31 -07:00
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2007-03-07 10:12:48 -07:00
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spin_lock_irqsave(&client->lock, flags);
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2006-12-19 17:58:31 -07:00
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event = container_of(client->event_list.next, struct event, link);
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list_del(&event->link);
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spin_unlock_irqrestore(&client->lock, flags);
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total = 0;
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for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) {
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size = min(event->v[i].size, count - total);
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2007-03-07 10:12:48 -07:00
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if (copy_to_user(buffer + total, event->v[i].data, size)) {
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retval = -EFAULT;
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2006-12-19 17:58:31 -07:00
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goto out;
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2007-03-07 10:12:48 -07:00
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}
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2006-12-19 17:58:31 -07:00
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total += size;
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}
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retval = total;
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out:
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kfree(event);
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return retval;
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}
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static ssize_t
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fw_device_op_read(struct file *file,
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char __user *buffer, size_t count, loff_t *offset)
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{
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struct client *client = file->private_data;
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return dequeue_event(client, buffer, count);
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}
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2007-03-07 10:12:43 -07:00
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static void
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fill_bus_reset_event(struct fw_cdev_event_bus_reset *event,
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2007-03-26 22:43:39 -07:00
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struct client *client)
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2007-03-07 10:12:43 -07:00
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{
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2007-03-26 22:43:39 -07:00
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struct fw_card *card = client->device->card;
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2007-03-07 10:12:43 -07:00
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2007-03-26 22:43:39 -07:00
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event->closure = client->bus_reset_closure;
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2007-03-07 10:12:43 -07:00
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event->type = FW_CDEV_EVENT_BUS_RESET;
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2007-03-26 22:43:39 -07:00
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event->node_id = client->device->node_id;
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2007-03-07 10:12:43 -07:00
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event->local_node_id = card->local_node->node_id;
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event->bm_node_id = 0; /* FIXME: We don't track the BM. */
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event->irm_node_id = card->irm_node->node_id;
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event->root_node_id = card->root_node->node_id;
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event->generation = card->generation;
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}
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2007-03-07 10:12:48 -07:00
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static void
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for_each_client(struct fw_device *device,
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void (*callback)(struct client *client))
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{
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struct fw_card *card = device->card;
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struct client *c;
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unsigned long flags;
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spin_lock_irqsave(&card->lock, flags);
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list_for_each_entry(c, &device->client_list, link)
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callback(c);
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spin_unlock_irqrestore(&card->lock, flags);
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}
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2007-03-07 10:12:41 -07:00
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static void
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queue_bus_reset_event(struct client *client)
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{
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struct bus_reset *bus_reset;
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bus_reset = kzalloc(sizeof *bus_reset, GFP_ATOMIC);
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if (bus_reset == NULL) {
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fw_notify("Out of memory when allocating bus reset event\n");
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return;
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}
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2007-03-26 22:43:39 -07:00
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fill_bus_reset_event(&bus_reset->reset, client);
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2007-03-07 10:12:41 -07:00
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queue_event(client, &bus_reset->event,
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&bus_reset->reset, sizeof bus_reset->reset, NULL, 0);
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}
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void fw_device_cdev_update(struct fw_device *device)
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{
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2007-03-07 10:12:48 -07:00
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for_each_client(device, queue_bus_reset_event);
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}
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2007-03-07 10:12:41 -07:00
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2007-03-07 10:12:48 -07:00
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static void wake_up_client(struct client *client)
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{
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wake_up_interruptible(&client->wait);
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}
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2007-03-07 10:12:41 -07:00
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2007-03-07 10:12:48 -07:00
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void fw_device_cdev_remove(struct fw_device *device)
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{
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for_each_client(device, wake_up_client);
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2007-03-07 10:12:41 -07:00
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}
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2007-03-07 10:12:43 -07:00
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static int ioctl_get_info(struct client *client, void __user *arg)
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2006-12-19 17:58:31 -07:00
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{
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2007-03-07 10:12:43 -07:00
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struct fw_cdev_get_info get_info;
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struct fw_cdev_event_bus_reset bus_reset;
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if (copy_from_user(&get_info, arg, sizeof get_info))
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return -EFAULT;
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client->version = get_info.version;
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get_info.version = FW_CDEV_VERSION;
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if (get_info.rom != 0) {
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void __user *uptr = u64_to_uptr(get_info.rom);
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2007-03-20 11:42:15 -07:00
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size_t want = get_info.rom_length;
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size_t have = client->device->config_rom_length * 4;
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2007-03-07 10:12:43 -07:00
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2007-03-20 11:42:15 -07:00
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if (copy_to_user(uptr, client->device->config_rom,
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min(want, have)))
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2007-03-07 10:12:43 -07:00
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return -EFAULT;
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}
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get_info.rom_length = client->device->config_rom_length * 4;
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2007-03-26 22:43:39 -07:00
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client->bus_reset_closure = get_info.bus_reset_closure;
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2007-03-07 10:12:43 -07:00
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if (get_info.bus_reset != 0) {
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void __user *uptr = u64_to_uptr(get_info.bus_reset);
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2007-03-26 22:43:39 -07:00
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fill_bus_reset_event(&bus_reset, client);
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2007-03-07 10:12:43 -07:00
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if (copy_to_user(uptr, &bus_reset, sizeof bus_reset))
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return -EFAULT;
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}
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2006-12-19 17:58:31 -07:00
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2007-03-07 10:12:52 -07:00
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get_info.card = client->device->card->index;
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2007-03-07 10:12:43 -07:00
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if (copy_to_user(arg, &get_info, sizeof get_info))
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2006-12-19 17:58:31 -07:00
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return -EFAULT;
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return 0;
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}
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static void
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complete_transaction(struct fw_card *card, int rcode,
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void *payload, size_t length, void *data)
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{
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struct response *response = data;
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struct client *client = response->client;
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2007-03-07 10:12:50 -07:00
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unsigned long flags;
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2006-12-19 17:58:31 -07:00
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if (length < response->response.length)
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response->response.length = length;
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if (rcode == RCODE_COMPLETE)
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memcpy(response->response.data, payload,
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response->response.length);
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2007-03-07 10:12:50 -07:00
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spin_lock_irqsave(&client->lock, flags);
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list_del(&response->link);
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spin_unlock_irqrestore(&client->lock, flags);
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2006-12-19 17:58:31 -07:00
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response->response.type = FW_CDEV_EVENT_RESPONSE;
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response->response.rcode = rcode;
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queue_event(client, &response->event,
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&response->response, sizeof response->response,
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response->response.data, response->response.length);
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}
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static ssize_t ioctl_send_request(struct client *client, void __user *arg)
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|
|
{
|
|
|
|
struct fw_device *device = client->device;
|
|
|
|
struct fw_cdev_send_request request;
|
|
|
|
struct response *response;
|
2007-03-07 10:12:50 -07:00
|
|
|
unsigned long flags;
|
2006-12-19 17:58:31 -07:00
|
|
|
|
|
|
|
if (copy_from_user(&request, arg, sizeof request))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
/* What is the biggest size we'll accept, really? */
|
|
|
|
if (request.length > 4096)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
response = kmalloc(sizeof *response + request.length, GFP_KERNEL);
|
|
|
|
if (response == NULL)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
response->client = client;
|
|
|
|
response->response.length = request.length;
|
|
|
|
response->response.closure = request.closure;
|
|
|
|
|
|
|
|
if (request.data &&
|
|
|
|
copy_from_user(response->response.data,
|
|
|
|
u64_to_uptr(request.data), request.length)) {
|
|
|
|
kfree(response);
|
|
|
|
return -EFAULT;
|
|
|
|
}
|
|
|
|
|
2007-03-07 10:12:50 -07:00
|
|
|
spin_lock_irqsave(&client->lock, flags);
|
|
|
|
list_add_tail(&response->link, &client->transaction_list);
|
|
|
|
spin_unlock_irqrestore(&client->lock, flags);
|
|
|
|
|
2006-12-19 17:58:31 -07:00
|
|
|
fw_send_request(device->card, &response->transaction,
|
2007-03-07 10:12:43 -07:00
|
|
|
request.tcode & 0x1f,
|
2007-01-23 13:11:43 -07:00
|
|
|
device->node->node_id,
|
2007-03-07 10:12:53 -07:00
|
|
|
request.generation,
|
2006-12-19 17:58:31 -07:00
|
|
|
device->node->max_speed,
|
|
|
|
request.offset,
|
|
|
|
response->response.data, request.length,
|
|
|
|
complete_transaction, response);
|
|
|
|
|
|
|
|
if (request.data)
|
|
|
|
return sizeof request + request.length;
|
|
|
|
else
|
|
|
|
return sizeof request;
|
|
|
|
}
|
|
|
|
|
|
|
|
struct address_handler {
|
|
|
|
struct fw_address_handler handler;
|
|
|
|
__u64 closure;
|
|
|
|
struct client *client;
|
|
|
|
struct list_head link;
|
|
|
|
};
|
|
|
|
|
|
|
|
struct request {
|
|
|
|
struct fw_request *request;
|
|
|
|
void *data;
|
|
|
|
size_t length;
|
|
|
|
u32 serial;
|
|
|
|
struct list_head link;
|
|
|
|
};
|
|
|
|
|
|
|
|
struct request_event {
|
|
|
|
struct event event;
|
|
|
|
struct fw_cdev_event_request request;
|
|
|
|
};
|
|
|
|
|
|
|
|
static void
|
|
|
|
handle_request(struct fw_card *card, struct fw_request *r,
|
|
|
|
int tcode, int destination, int source,
|
|
|
|
int generation, int speed,
|
|
|
|
unsigned long long offset,
|
|
|
|
void *payload, size_t length, void *callback_data)
|
|
|
|
{
|
|
|
|
struct address_handler *handler = callback_data;
|
|
|
|
struct request *request;
|
|
|
|
struct request_event *e;
|
|
|
|
unsigned long flags;
|
|
|
|
struct client *client = handler->client;
|
|
|
|
|
|
|
|
request = kmalloc(sizeof *request, GFP_ATOMIC);
|
|
|
|
e = kmalloc(sizeof *e, GFP_ATOMIC);
|
|
|
|
if (request == NULL || e == NULL) {
|
|
|
|
kfree(request);
|
|
|
|
kfree(e);
|
|
|
|
fw_send_response(card, r, RCODE_CONFLICT_ERROR);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
request->request = r;
|
|
|
|
request->data = payload;
|
|
|
|
request->length = length;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&client->lock, flags);
|
|
|
|
request->serial = client->request_serial++;
|
|
|
|
list_add_tail(&request->link, &client->request_list);
|
|
|
|
spin_unlock_irqrestore(&client->lock, flags);
|
|
|
|
|
|
|
|
e->request.type = FW_CDEV_EVENT_REQUEST;
|
|
|
|
e->request.tcode = tcode;
|
|
|
|
e->request.offset = offset;
|
|
|
|
e->request.length = length;
|
|
|
|
e->request.serial = request->serial;
|
|
|
|
e->request.closure = handler->closure;
|
|
|
|
|
|
|
|
queue_event(client, &e->event,
|
|
|
|
&e->request, sizeof e->request, payload, length);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ioctl_allocate(struct client *client, void __user *arg)
|
|
|
|
{
|
|
|
|
struct fw_cdev_allocate request;
|
|
|
|
struct address_handler *handler;
|
|
|
|
unsigned long flags;
|
|
|
|
struct fw_address_region region;
|
|
|
|
|
|
|
|
if (copy_from_user(&request, arg, sizeof request))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
handler = kmalloc(sizeof *handler, GFP_KERNEL);
|
|
|
|
if (handler == NULL)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
region.start = request.offset;
|
|
|
|
region.end = request.offset + request.length;
|
|
|
|
handler->handler.length = request.length;
|
|
|
|
handler->handler.address_callback = handle_request;
|
|
|
|
handler->handler.callback_data = handler;
|
|
|
|
handler->closure = request.closure;
|
|
|
|
handler->client = client;
|
|
|
|
|
|
|
|
if (fw_core_add_address_handler(&handler->handler, ®ion) < 0) {
|
|
|
|
kfree(handler);
|
|
|
|
return -EBUSY;
|
|
|
|
}
|
|
|
|
|
|
|
|
spin_lock_irqsave(&client->lock, flags);
|
|
|
|
list_add_tail(&handler->link, &client->handler_list);
|
|
|
|
spin_unlock_irqrestore(&client->lock, flags);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2007-03-14 14:34:55 -07:00
|
|
|
static int ioctl_deallocate(struct client *client, void __user *arg)
|
|
|
|
{
|
|
|
|
struct fw_cdev_deallocate request;
|
|
|
|
struct address_handler *handler;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
if (copy_from_user(&request, arg, sizeof request))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&client->lock, flags);
|
|
|
|
list_for_each_entry(handler, &client->handler_list, link) {
|
|
|
|
if (handler->handler.offset == request.offset) {
|
|
|
|
list_del(&handler->link);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&client->lock, flags);
|
|
|
|
|
|
|
|
if (&handler->link == &client->handler_list)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
fw_core_remove_address_handler(&handler->handler);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2006-12-19 17:58:31 -07:00
|
|
|
static int ioctl_send_response(struct client *client, void __user *arg)
|
|
|
|
{
|
|
|
|
struct fw_cdev_send_response request;
|
|
|
|
struct request *r;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
if (copy_from_user(&request, arg, sizeof request))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&client->lock, flags);
|
|
|
|
list_for_each_entry(r, &client->request_list, link) {
|
|
|
|
if (r->serial == request.serial) {
|
|
|
|
list_del(&r->link);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&client->lock, flags);
|
|
|
|
|
|
|
|
if (&r->link == &client->request_list)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (request.length < r->length)
|
|
|
|
r->length = request.length;
|
|
|
|
if (copy_from_user(r->data, u64_to_uptr(request.data), r->length))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
fw_send_response(client->device->card, r->request, request.rcode);
|
|
|
|
|
|
|
|
kfree(r);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2007-03-07 10:12:42 -07:00
|
|
|
static int ioctl_initiate_bus_reset(struct client *client, void __user *arg)
|
|
|
|
{
|
|
|
|
struct fw_cdev_initiate_bus_reset request;
|
|
|
|
int short_reset;
|
|
|
|
|
|
|
|
if (copy_from_user(&request, arg, sizeof request))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
short_reset = (request.type == FW_CDEV_SHORT_RESET);
|
|
|
|
|
|
|
|
return fw_core_initiate_bus_reset(client->device->card, short_reset);
|
|
|
|
}
|
|
|
|
|
2006-12-19 17:58:31 -07:00
|
|
|
static void
|
2007-02-16 15:34:44 -07:00
|
|
|
iso_callback(struct fw_iso_context *context, u32 cycle,
|
|
|
|
size_t header_length, void *header, void *data)
|
2006-12-19 17:58:31 -07:00
|
|
|
{
|
|
|
|
struct client *client = data;
|
|
|
|
struct iso_interrupt *interrupt;
|
|
|
|
|
2007-02-16 15:34:44 -07:00
|
|
|
interrupt = kzalloc(sizeof *interrupt + header_length, GFP_ATOMIC);
|
2006-12-19 17:58:31 -07:00
|
|
|
if (interrupt == NULL)
|
|
|
|
return;
|
|
|
|
|
|
|
|
interrupt->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT;
|
|
|
|
interrupt->interrupt.closure = 0;
|
|
|
|
interrupt->interrupt.cycle = cycle;
|
2007-02-16 15:34:44 -07:00
|
|
|
interrupt->interrupt.header_length = header_length;
|
|
|
|
memcpy(interrupt->interrupt.header, header, header_length);
|
2006-12-19 17:58:31 -07:00
|
|
|
queue_event(client, &interrupt->event,
|
2007-02-16 15:34:44 -07:00
|
|
|
&interrupt->interrupt,
|
|
|
|
sizeof interrupt->interrupt + header_length, NULL, 0);
|
2006-12-19 17:58:31 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static int ioctl_create_iso_context(struct client *client, void __user *arg)
|
|
|
|
{
|
|
|
|
struct fw_cdev_create_iso_context request;
|
|
|
|
|
|
|
|
if (copy_from_user(&request, arg, sizeof request))
|
|
|
|
return -EFAULT;
|
|
|
|
|
2007-02-16 15:34:50 -07:00
|
|
|
if (request.channel > 63)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2007-03-14 14:34:53 -07:00
|
|
|
switch (request.type) {
|
|
|
|
case FW_ISO_CONTEXT_RECEIVE:
|
|
|
|
if (request.header_size < 4 || (request.header_size & 3))
|
|
|
|
return -EINVAL;
|
2007-02-16 15:34:51 -07:00
|
|
|
|
2007-03-14 14:34:53 -07:00
|
|
|
break;
|
|
|
|
|
|
|
|
case FW_ISO_CONTEXT_TRANSMIT:
|
|
|
|
if (request.speed > SCODE_3200)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
2007-02-16 15:34:50 -07:00
|
|
|
return -EINVAL;
|
2007-03-14 14:34:53 -07:00
|
|
|
}
|
|
|
|
|
2006-12-19 17:58:31 -07:00
|
|
|
client->iso_context = fw_iso_context_create(client->device->card,
|
2007-02-16 15:34:40 -07:00
|
|
|
request.type,
|
2007-02-16 15:34:50 -07:00
|
|
|
request.channel,
|
|
|
|
request.speed,
|
2007-03-07 10:12:51 -07:00
|
|
|
request.header_size,
|
2006-12-19 17:58:31 -07:00
|
|
|
iso_callback, client);
|
|
|
|
if (IS_ERR(client->iso_context))
|
|
|
|
return PTR_ERR(client->iso_context);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ioctl_queue_iso(struct client *client, void __user *arg)
|
|
|
|
{
|
|
|
|
struct fw_cdev_queue_iso request;
|
|
|
|
struct fw_cdev_iso_packet __user *p, *end, *next;
|
2007-02-16 15:34:44 -07:00
|
|
|
struct fw_iso_context *ctx = client->iso_context;
|
2007-02-16 15:34:40 -07:00
|
|
|
unsigned long payload, payload_end, header_length;
|
2006-12-19 17:58:31 -07:00
|
|
|
int count;
|
|
|
|
struct {
|
|
|
|
struct fw_iso_packet packet;
|
|
|
|
u8 header[256];
|
|
|
|
} u;
|
|
|
|
|
2007-02-16 15:34:44 -07:00
|
|
|
if (ctx == NULL)
|
2006-12-19 17:58:31 -07:00
|
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(&request, arg, sizeof request))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
/* If the user passes a non-NULL data pointer, has mmap()'ed
|
|
|
|
* the iso buffer, and the pointer points inside the buffer,
|
|
|
|
* we setup the payload pointers accordingly. Otherwise we
|
2007-02-16 15:34:38 -07:00
|
|
|
* set them both to 0, which will still let packets with
|
2006-12-19 17:58:31 -07:00
|
|
|
* payload_length == 0 through. In other words, if no packets
|
|
|
|
* use the indirect payload, the iso buffer need not be mapped
|
|
|
|
* and the request.data pointer is ignored.*/
|
|
|
|
|
2007-02-16 15:34:38 -07:00
|
|
|
payload = (unsigned long)request.data - client->vm_start;
|
|
|
|
payload_end = payload + (client->buffer.page_count << PAGE_SHIFT);
|
|
|
|
if (request.data == 0 || client->buffer.pages == NULL ||
|
|
|
|
payload >= payload_end) {
|
|
|
|
payload = 0;
|
|
|
|
payload_end = 0;
|
2006-12-19 17:58:31 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
if (!access_ok(VERIFY_READ, request.packets, request.size))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(request.packets);
|
|
|
|
end = (void __user *)p + request.size;
|
|
|
|
count = 0;
|
|
|
|
while (p < end) {
|
|
|
|
if (__copy_from_user(&u.packet, p, sizeof *p))
|
|
|
|
return -EFAULT;
|
2007-02-16 15:34:40 -07:00
|
|
|
|
2007-02-16 15:34:44 -07:00
|
|
|
if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) {
|
2007-02-16 15:34:40 -07:00
|
|
|
header_length = u.packet.header_length;
|
|
|
|
} else {
|
|
|
|
/* We require that header_length is a multiple of
|
|
|
|
* the fixed header size, ctx->header_size */
|
2007-02-16 15:34:44 -07:00
|
|
|
if (ctx->header_size == 0) {
|
|
|
|
if (u.packet.header_length > 0)
|
|
|
|
return -EINVAL;
|
|
|
|
} else if (u.packet.header_length % ctx->header_size != 0) {
|
2007-02-16 15:34:40 -07:00
|
|
|
return -EINVAL;
|
2007-02-16 15:34:44 -07:00
|
|
|
}
|
2007-02-16 15:34:40 -07:00
|
|
|
header_length = 0;
|
|
|
|
}
|
|
|
|
|
2006-12-19 17:58:31 -07:00
|
|
|
next = (struct fw_cdev_iso_packet __user *)
|
2007-02-16 15:34:40 -07:00
|
|
|
&p->header[header_length / 4];
|
2006-12-19 17:58:31 -07:00
|
|
|
if (next > end)
|
|
|
|
return -EINVAL;
|
|
|
|
if (__copy_from_user
|
2007-02-16 15:34:40 -07:00
|
|
|
(u.packet.header, p->header, header_length))
|
2006-12-19 17:58:31 -07:00
|
|
|
return -EFAULT;
|
2007-02-16 15:34:51 -07:00
|
|
|
if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT &&
|
2006-12-19 17:58:31 -07:00
|
|
|
u.packet.header_length + u.packet.payload_length > 0)
|
|
|
|
return -EINVAL;
|
|
|
|
if (payload + u.packet.payload_length > payload_end)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2007-02-16 15:34:44 -07:00
|
|
|
if (fw_iso_context_queue(ctx, &u.packet,
|
|
|
|
&client->buffer, payload))
|
2006-12-19 17:58:31 -07:00
|
|
|
break;
|
|
|
|
|
|
|
|
p = next;
|
|
|
|
payload += u.packet.payload_length;
|
|
|
|
count++;
|
|
|
|
}
|
|
|
|
|
|
|
|
request.size -= uptr_to_u64(p) - request.packets;
|
|
|
|
request.packets = uptr_to_u64(p);
|
2007-02-16 15:34:38 -07:00
|
|
|
request.data = client->vm_start + payload;
|
2006-12-19 17:58:31 -07:00
|
|
|
|
|
|
|
if (copy_to_user(arg, &request, sizeof request))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
2007-02-16 15:34:41 -07:00
|
|
|
static int ioctl_start_iso(struct client *client, void __user *arg)
|
2006-12-19 17:58:31 -07:00
|
|
|
{
|
2007-02-16 15:34:41 -07:00
|
|
|
struct fw_cdev_start_iso request;
|
2006-12-19 17:58:31 -07:00
|
|
|
|
|
|
|
if (copy_from_user(&request, arg, sizeof request))
|
|
|
|
return -EFAULT;
|
|
|
|
|
2007-03-14 14:34:54 -07:00
|
|
|
if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE) {
|
|
|
|
if (request.tags == 0 || request.tags > 15)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (request.sync > 15)
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
return fw_iso_context_start(client->iso_context,
|
|
|
|
request.cycle, request.sync, request.tags);
|
2006-12-19 17:58:31 -07:00
|
|
|
}
|
|
|
|
|
2007-02-16 15:34:42 -07:00
|
|
|
static int ioctl_stop_iso(struct client *client, void __user *arg)
|
|
|
|
{
|
|
|
|
return fw_iso_context_stop(client->iso_context);
|
|
|
|
}
|
|
|
|
|
2006-12-19 17:58:31 -07:00
|
|
|
static int
|
|
|
|
dispatch_ioctl(struct client *client, unsigned int cmd, void __user *arg)
|
|
|
|
{
|
|
|
|
switch (cmd) {
|
2007-03-07 10:12:43 -07:00
|
|
|
case FW_CDEV_IOC_GET_INFO:
|
|
|
|
return ioctl_get_info(client, arg);
|
2006-12-19 17:58:31 -07:00
|
|
|
case FW_CDEV_IOC_SEND_REQUEST:
|
|
|
|
return ioctl_send_request(client, arg);
|
|
|
|
case FW_CDEV_IOC_ALLOCATE:
|
|
|
|
return ioctl_allocate(client, arg);
|
2007-03-14 14:34:55 -07:00
|
|
|
case FW_CDEV_IOC_DEALLOCATE:
|
|
|
|
return ioctl_deallocate(client, arg);
|
2006-12-19 17:58:31 -07:00
|
|
|
case FW_CDEV_IOC_SEND_RESPONSE:
|
|
|
|
return ioctl_send_response(client, arg);
|
2007-03-07 10:12:42 -07:00
|
|
|
case FW_CDEV_IOC_INITIATE_BUS_RESET:
|
|
|
|
return ioctl_initiate_bus_reset(client, arg);
|
2006-12-19 17:58:31 -07:00
|
|
|
case FW_CDEV_IOC_CREATE_ISO_CONTEXT:
|
|
|
|
return ioctl_create_iso_context(client, arg);
|
|
|
|
case FW_CDEV_IOC_QUEUE_ISO:
|
|
|
|
return ioctl_queue_iso(client, arg);
|
2007-02-16 15:34:41 -07:00
|
|
|
case FW_CDEV_IOC_START_ISO:
|
|
|
|
return ioctl_start_iso(client, arg);
|
2007-02-16 15:34:42 -07:00
|
|
|
case FW_CDEV_IOC_STOP_ISO:
|
|
|
|
return ioctl_stop_iso(client, arg);
|
2006-12-19 17:58:31 -07:00
|
|
|
default:
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static long
|
|
|
|
fw_device_op_ioctl(struct file *file,
|
|
|
|
unsigned int cmd, unsigned long arg)
|
|
|
|
{
|
|
|
|
struct client *client = file->private_data;
|
|
|
|
|
|
|
|
return dispatch_ioctl(client, cmd, (void __user *) arg);
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
|
|
static long
|
|
|
|
fw_device_op_compat_ioctl(struct file *file,
|
|
|
|
unsigned int cmd, unsigned long arg)
|
|
|
|
{
|
|
|
|
struct client *client = file->private_data;
|
|
|
|
|
|
|
|
return dispatch_ioctl(client, cmd, compat_ptr(arg));
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma)
|
|
|
|
{
|
|
|
|
struct client *client = file->private_data;
|
2007-02-16 15:34:38 -07:00
|
|
|
enum dma_data_direction direction;
|
|
|
|
unsigned long size;
|
|
|
|
int page_count, retval;
|
|
|
|
|
|
|
|
/* FIXME: We could support multiple buffers, but we don't. */
|
|
|
|
if (client->buffer.pages != NULL)
|
|
|
|
return -EBUSY;
|
|
|
|
|
|
|
|
if (!(vma->vm_flags & VM_SHARED))
|
|
|
|
return -EINVAL;
|
2006-12-19 17:58:31 -07:00
|
|
|
|
2007-02-16 15:34:38 -07:00
|
|
|
if (vma->vm_start & ~PAGE_MASK)
|
2006-12-19 17:58:31 -07:00
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
client->vm_start = vma->vm_start;
|
2007-02-16 15:34:38 -07:00
|
|
|
size = vma->vm_end - vma->vm_start;
|
|
|
|
page_count = size >> PAGE_SHIFT;
|
|
|
|
if (size & ~PAGE_MASK)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (vma->vm_flags & VM_WRITE)
|
|
|
|
direction = DMA_TO_DEVICE;
|
|
|
|
else
|
|
|
|
direction = DMA_FROM_DEVICE;
|
|
|
|
|
|
|
|
retval = fw_iso_buffer_init(&client->buffer, client->device->card,
|
|
|
|
page_count, direction);
|
|
|
|
if (retval < 0)
|
|
|
|
return retval;
|
2006-12-19 17:58:31 -07:00
|
|
|
|
2007-02-16 15:34:38 -07:00
|
|
|
retval = fw_iso_buffer_map(&client->buffer, vma);
|
|
|
|
if (retval < 0)
|
|
|
|
fw_iso_buffer_destroy(&client->buffer, client->device->card);
|
|
|
|
|
|
|
|
return retval;
|
2006-12-19 17:58:31 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static int fw_device_op_release(struct inode *inode, struct file *file)
|
|
|
|
{
|
|
|
|
struct client *client = file->private_data;
|
2007-03-07 10:12:48 -07:00
|
|
|
struct address_handler *h, *next_h;
|
2006-12-19 17:58:31 -07:00
|
|
|
struct request *r, *next_r;
|
2007-03-07 10:12:48 -07:00
|
|
|
struct event *e, *next_e;
|
2007-03-07 10:12:50 -07:00
|
|
|
struct response *t, *next_t;
|
2007-03-07 10:12:41 -07:00
|
|
|
unsigned long flags;
|
2006-12-19 17:58:31 -07:00
|
|
|
|
2007-02-16 15:34:38 -07:00
|
|
|
if (client->buffer.pages)
|
|
|
|
fw_iso_buffer_destroy(&client->buffer, client->device->card);
|
|
|
|
|
2006-12-19 17:58:31 -07:00
|
|
|
if (client->iso_context)
|
|
|
|
fw_iso_context_destroy(client->iso_context);
|
|
|
|
|
2007-03-07 10:12:48 -07:00
|
|
|
list_for_each_entry_safe(h, next_h, &client->handler_list, link) {
|
2006-12-19 17:58:31 -07:00
|
|
|
fw_core_remove_address_handler(&h->handler);
|
|
|
|
kfree(h);
|
|
|
|
}
|
|
|
|
|
|
|
|
list_for_each_entry_safe(r, next_r, &client->request_list, link) {
|
|
|
|
fw_send_response(client->device->card, r->request,
|
|
|
|
RCODE_CONFLICT_ERROR);
|
|
|
|
kfree(r);
|
|
|
|
}
|
|
|
|
|
2007-03-14 14:34:57 -07:00
|
|
|
list_for_each_entry_safe(t, next_t, &client->transaction_list, link) {
|
2007-03-07 10:12:50 -07:00
|
|
|
fw_cancel_transaction(client->device->card, &t->transaction);
|
2007-03-14 14:34:57 -07:00
|
|
|
kfree(t);
|
|
|
|
}
|
2007-03-07 10:12:50 -07:00
|
|
|
|
|
|
|
/* FIXME: We should wait for the async tasklets to stop
|
|
|
|
* running before freeing the memory. */
|
|
|
|
|
2007-03-07 10:12:48 -07:00
|
|
|
list_for_each_entry_safe(e, next_e, &client->event_list, link)
|
|
|
|
kfree(e);
|
2006-12-19 17:58:31 -07:00
|
|
|
|
2007-03-07 10:12:41 -07:00
|
|
|
spin_lock_irqsave(&client->device->card->lock, flags);
|
|
|
|
list_del(&client->link);
|
|
|
|
spin_unlock_irqrestore(&client->device->card->lock, flags);
|
|
|
|
|
2006-12-19 17:58:31 -07:00
|
|
|
fw_device_put(client->device);
|
|
|
|
kfree(client);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static unsigned int fw_device_op_poll(struct file *file, poll_table * pt)
|
|
|
|
{
|
|
|
|
struct client *client = file->private_data;
|
2007-03-07 10:12:48 -07:00
|
|
|
unsigned int mask = 0;
|
2006-12-19 17:58:31 -07:00
|
|
|
|
|
|
|
poll_wait(file, &client->wait, pt);
|
|
|
|
|
2007-03-07 10:12:48 -07:00
|
|
|
if (fw_device_is_shutdown(client->device))
|
|
|
|
mask |= POLLHUP | POLLERR;
|
2006-12-19 17:58:31 -07:00
|
|
|
if (!list_empty(&client->event_list))
|
2007-03-07 10:12:48 -07:00
|
|
|
mask |= POLLIN | POLLRDNORM;
|
|
|
|
|
|
|
|
return mask;
|
2006-12-19 17:58:31 -07:00
|
|
|
}
|
|
|
|
|
2007-01-14 07:29:07 -07:00
|
|
|
const struct file_operations fw_device_ops = {
|
2006-12-19 17:58:31 -07:00
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.open = fw_device_op_open,
|
|
|
|
.read = fw_device_op_read,
|
|
|
|
.unlocked_ioctl = fw_device_op_ioctl,
|
|
|
|
.poll = fw_device_op_poll,
|
|
|
|
.release = fw_device_op_release,
|
|
|
|
.mmap = fw_device_op_mmap,
|
|
|
|
|
|
|
|
#ifdef CONFIG_COMPAT
|
2007-01-21 12:45:32 -07:00
|
|
|
.compat_ioctl = fw_device_op_compat_ioctl,
|
2006-12-19 17:58:31 -07:00
|
|
|
#endif
|
|
|
|
};
|