| // 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 */ |