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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2003-2008 Takahiro Hirofuchi
* Copyright (C) 2015 Nobuo Iwata
*
* 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.
*
*/
#ifndef __USBIP_VHCI_H
#define __USBIP_VHCI_H
#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;
};
enum hub_speed {
HUB_SPEED_HIGH = 0,
HUB_SPEED_SUPER,
};
/* Number of supported ports. Value has an upperbound of USB_MAXCHILDREN */
#ifdef CONFIG_USBIP_VHCI_HC_PORTS
#define VHCI_HC_PORTS CONFIG_USBIP_VHCI_HC_PORTS
#else
#define VHCI_HC_PORTS 8
#endif
/* Each VHCI has 2 hubs (USB2 and USB3), each has VHCI_HC_PORTS ports */
#define VHCI_PORTS (VHCI_HC_PORTS*2)
#ifdef CONFIG_USBIP_VHCI_NR_HCS
#define VHCI_NR_HCS CONFIG_USBIP_VHCI_NR_HCS
#else
#define VHCI_NR_HCS 1
#endif
#define MAX_STATUS_NAME 16
struct vhci {
spinlock_t lock;
struct platform_device *pdev;
struct vhci_hcd *vhci_hcd_hs;
struct vhci_hcd *vhci_hcd_ss;
};
/* for usb_hcd.hcd_priv[0] */
struct vhci_hcd {
struct vhci *vhci;
u32 port_status[VHCI_HC_PORTS];
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_HC_PORTS];
};
extern int vhci_num_controllers;
extern struct vhci *vhcis;
extern struct attribute_group vhci_attr_group;
/* vhci_hcd.c */
void rh_port_connect(struct vhci_device *vdev, enum usb_device_speed speed);
/* vhci_sysfs.c */
int vhci_init_attr_group(void);
void vhci_finish_attr_group(void);
/* 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 __u32 port_to_rhport(__u32 port)
{
return port % VHCI_HC_PORTS;
}
static inline int port_to_pdev_nr(__u32 port)
{
return port / VHCI_PORTS;
}
static inline struct vhci_hcd *hcd_to_vhci_hcd(struct usb_hcd *hcd)
{
return (struct vhci_hcd *) (hcd->hcd_priv);
}
static inline struct device *hcd_dev(struct usb_hcd *hcd)
{
return (hcd)->self.controller;
}
static inline const char *hcd_name(struct usb_hcd *hcd)
{
return (hcd)->self.bus_name;
}
static inline struct usb_hcd *vhci_hcd_to_hcd(struct vhci_hcd *vhci_hcd)
{
return container_of((void *) vhci_hcd, struct usb_hcd, hcd_priv);
}
static inline struct vhci_hcd *vdev_to_vhci_hcd(struct vhci_device *vdev)
{
return container_of((void *)(vdev - vdev->rhport), struct vhci_hcd, vdev);
}
#endif /* __USBIP_VHCI_H */
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