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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i2caux_interface.h (2238B)

      1/*
      2 * Copyright 2012-15 Advanced Micro Devices, Inc.
      3 *
      4 * Permission is hereby granted, free of charge, to any person obtaining a
      5 * copy of this software and associated documentation files (the "Software"),
      6 * to deal in the Software without restriction, including without limitation
      7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      8 * and/or sell copies of the Software, and to permit persons to whom the
      9 * Software is furnished to do so, subject to the following conditions:
     10 *
     11 * The above copyright notice and this permission notice shall be included in
     12 * all copies or substantial portions of the Software.
     13 *
     14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     20 * OTHER DEALINGS IN THE SOFTWARE.
     21 *
     22 * Authors: AMD
     23 *
     24 */
     25
     26#ifndef __DAL_I2CAUX_INTERFACE_H__
     27#define __DAL_I2CAUX_INTERFACE_H__
     28
     29#include "dc_types.h"
     30#include "gpio_service_interface.h"
     31
     32
     33#define DEFAULT_AUX_MAX_DATA_SIZE 16
     34#define AUX_MAX_DEFER_WRITE_RETRY 20
     35
     36struct aux_payload {
     37	/* set following flag to read/write I2C data,
     38	 * reset it to read/write DPCD data */
     39	bool i2c_over_aux;
     40	/* set following flag to write data,
     41	 * reset it to read data */
     42	bool write;
     43	bool mot;
     44	bool write_status_update;
     45
     46	uint32_t address;
     47	uint32_t length;
     48	uint8_t *data;
     49	/*
     50	 * used to return the reply type of the transaction
     51	 * ignored if NULL
     52	 */
     53	uint8_t *reply;
     54	/* expressed in milliseconds
     55	 * zero means "use default value"
     56	 */
     57	uint32_t defer_delay;
     58
     59};
     60
     61struct aux_command {
     62	struct aux_payload *payloads;
     63	uint8_t number_of_payloads;
     64
     65	/* expressed in milliseconds
     66	 * zero means "use default value" */
     67	uint32_t defer_delay;
     68
     69	/* zero means "use default value" */
     70	uint32_t max_defer_write_retry;
     71
     72	enum i2c_mot_mode mot;
     73};
     74
     75union aux_config {
     76	struct {
     77		uint32_t ALLOW_AUX_WHEN_HPD_LOW:1;
     78	} bits;
     79	uint32_t raw;
     80};
     81
     82#endif