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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cmp.h (1553B)


      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef SOUND_FIREWIRE_CMP_H_INCLUDED
      3#define SOUND_FIREWIRE_CMP_H_INCLUDED
      4
      5#include <linux/mutex.h>
      6#include <linux/types.h>
      7#include "iso-resources.h"
      8
      9struct fw_unit;
     10
     11enum cmp_direction {
     12	CMP_INPUT = 0,
     13	CMP_OUTPUT,
     14};
     15
     16/**
     17 * struct cmp_connection - manages an isochronous connection to a device
     18 * @speed: the connection's actual speed
     19 *
     20 * This structure manages (using CMP) an isochronous stream between the local
     21 * computer and a device's input plug (iPCR) and output plug (oPCR).
     22 *
     23 * There is no corresponding oPCR created on the local computer, so it is not
     24 * possible to overlay connections on top of this one.
     25 */
     26struct cmp_connection {
     27	int speed;
     28	/* private: */
     29	bool connected;
     30	struct mutex mutex;
     31	struct fw_iso_resources resources;
     32	__be32 last_pcr_value;
     33	unsigned int pcr_index;
     34	unsigned int max_speed;
     35	enum cmp_direction direction;
     36};
     37
     38int cmp_connection_init(struct cmp_connection *connection,
     39			struct fw_unit *unit,
     40			enum cmp_direction direction,
     41			unsigned int pcr_index);
     42int cmp_connection_check_used(struct cmp_connection *connection, bool *used);
     43void cmp_connection_destroy(struct cmp_connection *connection);
     44
     45int cmp_connection_reserve(struct cmp_connection *connection,
     46			   unsigned int max_payload);
     47void cmp_connection_release(struct cmp_connection *connection);
     48
     49int cmp_connection_establish(struct cmp_connection *connection);
     50int cmp_connection_update(struct cmp_connection *connection);
     51void cmp_connection_break(struct cmp_connection *connection);
     52
     53#endif