cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ch9.h (2332B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * This file holds USB constants and structures that are needed for
      4 * USB device APIs.  These are used by the USB device model, which is
      5 * defined in chapter 9 of the USB 2.0 specification and in the
      6 * Wireless USB 1.0 (spread around).  Linux has several APIs in C that
      7 * need these:
      8 *
      9 * - the host side Linux-USB kernel driver API;
     10 * - the "usbfs" user space API; and
     11 * - the Linux "gadget" device/peripheral side driver API.
     12 *
     13 * USB 2.0 adds an additional "On The Go" (OTG) mode, which lets systems
     14 * act either as a USB host or as a USB device.  That means the host and
     15 * device side APIs benefit from working well together.
     16 *
     17 * There's also "Wireless USB", using low power short range radios for
     18 * peripheral interconnection but otherwise building on the USB framework.
     19 *
     20 * Note all descriptors are declared '__attribute__((packed))' so that:
     21 *
     22 * [a] they never get padded, either internally (USB spec writers
     23 *     probably handled that) or externally;
     24 *
     25 * [b] so that accessing bigger-than-a-bytes fields will never
     26 *     generate bus errors on any platform, even when the location of
     27 *     its descriptor inside a bundle isn't "naturally aligned", and
     28 *
     29 * [c] for consistency, removing all doubt even when it appears to
     30 *     someone that the two other points are non-issues for that
     31 *     particular descriptor type.
     32 */
     33#ifndef __LINUX_USB_CH9_H
     34#define __LINUX_USB_CH9_H
     35
     36#include <uapi/linux/usb/ch9.h>
     37
     38/* USB 3.2 SuperSpeed Plus phy signaling rate generation and lane count */
     39
     40enum usb_ssp_rate {
     41	USB_SSP_GEN_UNKNOWN = 0,
     42	USB_SSP_GEN_2x1,
     43	USB_SSP_GEN_1x2,
     44	USB_SSP_GEN_2x2,
     45};
     46
     47struct device;
     48
     49extern const char *usb_ep_type_string(int ep_type);
     50extern const char *usb_speed_string(enum usb_device_speed speed);
     51extern enum usb_device_speed usb_get_maximum_speed(struct device *dev);
     52extern enum usb_ssp_rate usb_get_maximum_ssp_rate(struct device *dev);
     53extern const char *usb_state_string(enum usb_device_state state);
     54unsigned int usb_decode_interval(const struct usb_endpoint_descriptor *epd,
     55				 enum usb_device_speed speed);
     56
     57#ifdef CONFIG_TRACING
     58extern const char *usb_decode_ctrl(char *str, size_t size, __u8 bRequestType,
     59				   __u8 bRequest, __u16 wValue, __u16 wIndex,
     60				   __u16 wLength);
     61#endif
     62
     63#endif /* __LINUX_USB_CH9_H */