9720b4bc76
usbip has its own infrastructure for managing kernel threads, similar to kthread. By changing it to use the standard functions, we can simplify the code and get rid of one of the last BKL users at the same time. Includes changes suggested by Max Vozeler. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Takahiro Hirofuchi <hirofuchi@users.sourceforge.net> Cc: Max Vozeler <max@vozeler.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
143 lines
3.3 KiB
C
143 lines
3.3 KiB
C
/*
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* Copyright (C) 2003-2008 Takahiro Hirofuchi
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*
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* This 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 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
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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#include <linux/platform_device.h>
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#include <linux/usb/hcd.h>
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struct vhci_device {
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struct usb_device *udev;
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/*
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* devid specifies a remote usb device uniquely instead
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* of combination of busnum and devnum.
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*/
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__u32 devid;
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/* speed of a remote device */
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enum usb_device_speed speed;
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/* vhci root-hub port to which this device is attached */
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__u32 rhport;
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struct usbip_device ud;
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/* lock for the below link lists */
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spinlock_t priv_lock;
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/* vhci_priv is linked to one of them. */
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struct list_head priv_tx;
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struct list_head priv_rx;
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/* vhci_unlink is linked to one of them */
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struct list_head unlink_tx;
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struct list_head unlink_rx;
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/* vhci_tx thread sleeps for this queue */
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wait_queue_head_t waitq_tx;
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};
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/* urb->hcpriv, use container_of() */
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struct vhci_priv {
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unsigned long seqnum;
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struct list_head list;
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struct vhci_device *vdev;
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struct urb *urb;
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};
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struct vhci_unlink {
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/* seqnum of this request */
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unsigned long seqnum;
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struct list_head list;
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/* seqnum of the unlink target */
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unsigned long unlink_seqnum;
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};
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/*
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* The number of ports is less than 16 ?
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* USB_MAXCHILDREN is statically defined to 16 in usb.h. Its maximum value
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* would be 31 because the event_bits[1] of struct usb_hub is defined as
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* unsigned long in hub.h
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*/
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#define VHCI_NPORTS 8
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/* for usb_bus.hcpriv */
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struct vhci_hcd {
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spinlock_t lock;
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u32 port_status[VHCI_NPORTS];
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unsigned resuming:1;
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unsigned long re_timeout;
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atomic_t seqnum;
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/*
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* NOTE:
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* wIndex shows the port number and begins from 1.
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* But, the index of this array begins from 0.
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*/
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struct vhci_device vdev[VHCI_NPORTS];
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};
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extern struct vhci_hcd *the_controller;
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extern struct attribute_group dev_attr_group;
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/*-------------------------------------------------------------------------*/
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/* prototype declaration */
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/* vhci_hcd.c */
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void rh_port_connect(int rhport, enum usb_device_speed speed);
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void rh_port_disconnect(int rhport);
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int vhci_rx_loop(void *data);
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int vhci_tx_loop(void *data);
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struct urb *pickup_urb_and_free_priv(struct vhci_device *vdev,
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__u32 seqnum);
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#define hardware (&the_controller->pdev.dev)
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static inline struct vhci_device *port_to_vdev(__u32 port)
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{
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return &the_controller->vdev[port];
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}
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static inline struct vhci_hcd *hcd_to_vhci(struct usb_hcd *hcd)
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{
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return (struct vhci_hcd *) (hcd->hcd_priv);
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}
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static inline struct usb_hcd *vhci_to_hcd(struct vhci_hcd *vhci)
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{
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return container_of((void *) vhci, struct usb_hcd, hcd_priv);
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}
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static inline struct device *vhci_dev(struct vhci_hcd *vhci)
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{
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return vhci_to_hcd(vhci)->self.controller;
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}
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