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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protocol.h (1655B)

      1/* SPDX-License-Identifier: GPL-2.0+ */
      2/*
      3 * Driver for USB Mass Storage compliant devices
      4 * Protocol Functions Header File
      5 *
      6 * Current development and maintenance by:
      7 *   (c) 1999, 2000 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
      8 *
      9 * This driver is based on the 'USB Mass Storage Class' document. This
     10 * describes in detail the protocol used to communicate with such
     11 * devices.  Clearly, the designers had SCSI and ATAPI commands in
     12 * mind when they created this document.  The commands are all very
     13 * similar to commands in the SCSI-II and ATAPI specifications.
     14 *
     15 * It is important to note that in a number of cases this class
     16 * exhibits class-specific exemptions from the USB specification.
     17 * Notably the usage of NAK, STALL and ACK differs from the norm, in
     18 * that they are used to communicate wait, failed and OK on commands.
     19 *
     20 * Also, for certain devices, the interrupt endpoint is used to convey
     21 * status of a command.
     22 */
     23
     24#ifndef _PROTOCOL_H_
     25#define _PROTOCOL_H_
     26
     27/* Protocol handling routines */
     28extern void usb_stor_pad12_command(struct scsi_cmnd*, struct us_data*);
     29extern void usb_stor_ufi_command(struct scsi_cmnd*, struct us_data*);
     30extern void usb_stor_transparent_scsi_command(struct scsi_cmnd*,
     31		struct us_data*);
     32
     33/* struct scsi_cmnd transfer buffer access utilities */
     34enum xfer_buf_dir	{TO_XFER_BUF, FROM_XFER_BUF};
     35
     36extern unsigned int usb_stor_access_xfer_buf(unsigned char *buffer,
     37	unsigned int buflen, struct scsi_cmnd *srb, struct scatterlist **,
     38	unsigned int *offset, enum xfer_buf_dir dir);
     39
     40extern void usb_stor_set_xfer_buf(unsigned char *buffer,
     41	unsigned int buflen, struct scsi_cmnd *srb);
     42#endif