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/*
* Copyright (C) 2003-2008 Takahiro Hirofuchi
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
*/
#include <linux/device.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/sysfs.h>
#include <linux/types.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <linux/wait.h>
struct vhci_device {
struct usb_device *udev;
/*
* devid specifies a remote usb device uniquely instead
* of combination of busnum and devnum.
*/
__u32 devid;
/* speed of a remote device */
enum usb_device_speed speed;
/* vhci root-hub port to which this device is attached */
__u32 rhport;
struct usbip_device ud;
/* lock for the below link lists */
spinlock_t priv_lock;
/* vhci_priv is linked to one of them. */
struct list_head priv_tx;
struct list_head priv_rx;
/* vhci_unlink is linked to one of them */
struct list_head unlink_tx;
struct list_head unlink_rx;
/* vhci_tx thread sleeps for this queue */
wait_queue_head_t waitq_tx;
};
/* urb->hcpriv, use container_of() */
struct vhci_priv {
unsigned long seqnum;
struct list_head list;
struct vhci_device *vdev;
struct urb *urb;
};
struct vhci_unlink {
/* seqnum of this request */
unsigned long seqnum;
struct list_head list;
/* seqnum of the unlink target */
unsigned long unlink_seqnum;
};
/*
* The number of ports is less than 16 ?
* USB_MAXCHILDREN is statically defined to 16 in usb.h. Its maximum value
* would be 31 because the event_bits[1] of struct usb_hub is defined as
* unsigned long in hub.h
*/
#define VHCI_NPORTS 8
/* for usb_bus.hcpriv */
struct vhci_hcd {
spinlock_t lock;
u32 port_status[VHCI_NPORTS];
unsigned resuming:1;
unsigned long re_timeout;
atomic_t seqnum;
/*
* NOTE:
* wIndex shows the port number and begins from 1.
* But, the index of this array begins from 0.
*/
struct vhci_device vdev[VHCI_NPORTS];
};
extern struct vhci_hcd *the_controller;
extern const struct attribute_group dev_attr_group;
#define hardware (&the_controller->pdev.dev)
/* vhci_hcd.c */
void rh_port_connect(int rhport, enum usb_device_speed speed);
void rh_port_disconnect(int rhport);
/* vhci_rx.c */
struct urb *pickup_urb_and_free_priv(struct vhci_device *vdev, __u32 seqnum);
int vhci_rx_loop(void *data);
/* vhci_tx.c */
int vhci_tx_loop(void *data);
static inline struct vhci_device *port_to_vdev(__u32 port)
{
return &the_controller->vdev[port];
}
static inline struct vhci_hcd *hcd_to_vhci(struct usb_hcd *hcd)
{
return (struct vhci_hcd *) (hcd->hcd_priv);
}
static inline struct usb_hcd *vhci_to_hcd(struct vhci_hcd *vhci)
{
return container_of((void *) vhci, struct usb_hcd, hcd_priv);
}
static inline struct device *vhci_dev(struct vhci_hcd *vhci)
{
return vhci_to_hcd(vhci)->self.controller;
}
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