01446ef5af
The access to pending_port was racy when two devices were being attached at the same time. Signed-off-by: Max Vozeler <max@vozeler.com> Tested-by: Mark Wehby <MWehby@luxotticaRetail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
143 lines
3.3 KiB
C
143 lines
3.3 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* This is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
|
|
* USA.
|
|
*/
|
|
|
|
#include <linux/platform_device.h>
|
|
#include <linux/usb/hcd.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 struct attribute_group dev_attr_group;
|
|
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
/* prototype declaration */
|
|
|
|
/* vhci_hcd.c */
|
|
void rh_port_connect(int rhport, enum usb_device_speed speed);
|
|
void rh_port_disconnect(int rhport);
|
|
void vhci_rx_loop(struct usbip_task *ut);
|
|
void vhci_tx_loop(struct usbip_task *ut);
|
|
|
|
struct urb *pickup_urb_and_free_priv(struct vhci_device *vdev,
|
|
__u32 seqnum);
|
|
|
|
#define hardware (&the_controller->pdev.dev)
|
|
|
|
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;
|
|
}
|