cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

stub.h (2414B)

      1// SPDX-License-Identifier: GPL-2.0+
      2/*
      3 * Copyright (C) 2003-2008 Takahiro Hirofuchi
      4 */
      5
      6#ifndef __USBIP_STUB_H
      7#define __USBIP_STUB_H
      8
      9#include <linux/list.h>
     10#include <linux/slab.h>
     11#include <linux/spinlock.h>
     12#include <linux/types.h>
     13#include <linux/usb.h>
     14#include <linux/wait.h>
     15
     16#define STUB_BUSID_OTHER 0
     17#define STUB_BUSID_REMOV 1
     18#define STUB_BUSID_ADDED 2
     19#define STUB_BUSID_ALLOC 3
     20
     21struct stub_device {
     22	struct usb_device *udev;
     23
     24	struct usbip_device ud;
     25	__u32 devid;
     26
     27	/*
     28	 * stub_priv preserves private data of each urb.
     29	 * It is allocated as stub_priv_cache and assigned to urb->context.
     30	 *
     31	 * stub_priv is always linked to any one of 3 lists;
     32	 *	priv_init: linked to this until the comletion of a urb.
     33	 *	priv_tx  : linked to this after the completion of a urb.
     34	 *	priv_free: linked to this after the sending of the result.
     35	 *
     36	 * Any of these list operations should be locked by priv_lock.
     37	 */
     38	spinlock_t priv_lock;
     39	struct list_head priv_init;
     40	struct list_head priv_tx;
     41	struct list_head priv_free;
     42
     43	/* see comments for unlinking in stub_rx.c */
     44	struct list_head unlink_tx;
     45	struct list_head unlink_free;
     46
     47	wait_queue_head_t tx_waitq;
     48};
     49
     50/* private data into urb->priv */
     51struct stub_priv {
     52	unsigned long seqnum;
     53	struct list_head list;
     54	struct stub_device *sdev;
     55	struct urb **urbs;
     56	struct scatterlist *sgl;
     57	int num_urbs;
     58	int completed_urbs;
     59	int urb_status;
     60
     61	int unlinking;
     62};
     63
     64struct stub_unlink {
     65	unsigned long seqnum;
     66	struct list_head list;
     67	__u32 status;
     68};
     69
     70/* same as SYSFS_BUS_ID_SIZE */
     71#define BUSID_SIZE 32
     72
     73struct bus_id_priv {
     74	char name[BUSID_SIZE];
     75	char status;
     76	int interf_count;
     77	struct stub_device *sdev;
     78	struct usb_device *udev;
     79	char shutdown_busid;
     80	spinlock_t busid_lock;
     81};
     82
     83/* stub_priv is allocated from stub_priv_cache */
     84extern struct kmem_cache *stub_priv_cache;
     85
     86/* stub_dev.c */
     87extern struct usb_device_driver stub_driver;
     88
     89/* stub_main.c */
     90struct bus_id_priv *get_busid_priv(const char *busid);
     91void put_busid_priv(struct bus_id_priv *bid);
     92int del_match_busid(char *busid);
     93void stub_free_priv_and_urb(struct stub_priv *priv);
     94void stub_device_cleanup_urbs(struct stub_device *sdev);
     95
     96/* stub_rx.c */
     97int stub_rx_loop(void *data);
     98
     99/* stub_tx.c */
    100void stub_enqueue_ret_unlink(struct stub_device *sdev, __u32 seqnum,
    101			     __u32 status);
    102void stub_complete(struct urb *urb);
    103int stub_tx_loop(void *data);
    104
    105#endif /* __USBIP_STUB_H */