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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amd_sfh_pcie.h (3467B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      3 * AMD MP2 PCIe communication driver
      4 * Copyright 2020-2021 Advanced Micro Devices, Inc.
      5 * Authors: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
      6 *	    Sandeep Singh <Sandeep.singh@amd.com>
      7 *	    Basavaraj Natikar <Basavaraj.Natikar@amd.com>
      8 */
      9
     10#ifndef PCIE_MP2_AMD_H
     11#define PCIE_MP2_AMD_H
     12
     13#include <linux/pci.h>
     14#include "amd_sfh_hid.h"
     15
     16#define PCI_DEVICE_ID_AMD_MP2	0x15E4
     17
     18#define ENABLE_SENSOR		1
     19#define DISABLE_SENSOR		2
     20#define STOP_ALL_SENSORS	8
     21
     22/* MP2 C2P Message Registers */
     23#define AMD_C2P_MSG0	0x10500
     24#define AMD_C2P_MSG1	0x10504
     25#define AMD_C2P_MSG2	0x10508
     26
     27#define AMD_C2P_MSG(regno) (0x10500 + ((regno) * 4))
     28#define AMD_P2C_MSG(regno) (0x10680 + ((regno) * 4))
     29
     30/* MP2 P2C Message Registers */
     31#define AMD_P2C_MSG3	0x1068C /* Supported Sensors info */
     32
     33#define V2_STATUS	0x2
     34
     35#define SENSOR_ENABLED     4
     36#define SENSOR_DISABLED    5
     37
     38#define HPD_IDX		16
     39
     40#define AMD_SFH_IDLE_LOOP	200
     41
     42#define SENSOR_DISCOVERY_STATUS_MASK		GENMASK(5, 3)
     43#define SENSOR_DISCOVERY_STATUS_SHIFT		3
     44
     45/* SFH Command register */
     46union sfh_cmd_base {
     47	u32 ul;
     48	struct {
     49		u32 cmd_id : 8;
     50		u32 sensor_id : 8;
     51		u32 period : 16;
     52	} s;
     53	struct {
     54		u32 cmd_id : 4;
     55		u32 intr_disable : 1;
     56		u32 rsvd1 : 3;
     57		u32 length : 7;
     58		u32 mem_type : 1;
     59		u32 sensor_id : 8;
     60		u32 period : 8;
     61	} cmd_v2;
     62};
     63
     64union cmd_response {
     65	u32 resp;
     66	struct {
     67		u32 status	: 2;
     68		u32 out_in_c2p	: 1;
     69		u32 rsvd1	: 1;
     70		u32 response	: 4;
     71		u32 sub_cmd	: 8;
     72		u32 sensor_id	: 6;
     73		u32 rsvd2	: 10;
     74	} response_v2;
     75};
     76
     77union sfh_cmd_param {
     78	u32 ul;
     79	struct {
     80		u32 buf_layout : 2;
     81		u32 buf_length : 6;
     82		u32 rsvd : 24;
     83	} s;
     84};
     85
     86struct sfh_cmd_reg {
     87	union sfh_cmd_base cmd_base;
     88	union sfh_cmd_param cmd_param;
     89	phys_addr_t phys_addr;
     90};
     91
     92enum sensor_idx {
     93	accel_idx = 0,
     94	gyro_idx = 1,
     95	mag_idx = 2,
     96	als_idx = 19
     97};
     98
     99struct amd_mp2_dev {
    100	struct pci_dev *pdev;
    101	struct amdtp_cl_data *cl_data;
    102	void __iomem *mmio;
    103	const struct amd_mp2_ops *mp2_ops;
    104	struct amd_input_data in_data;
    105	/* mp2 active control status */
    106	u32 mp2_acs;
    107};
    108
    109struct amd_mp2_sensor_info {
    110	u8 sensor_idx;
    111	u32 period;
    112	dma_addr_t dma_address;
    113};
    114
    115enum mem_use_type {
    116	USE_DRAM,
    117	USE_C2P_REG,
    118};
    119
    120struct hpd_status {
    121	union {
    122		struct {
    123			u32 human_presence_report : 4;
    124			u32 human_presence_actual : 4;
    125			u32 probablity		  : 8;
    126			u32 object_distance       : 16;
    127		} shpd;
    128		u32 val;
    129	};
    130};
    131
    132void amd_start_sensor(struct amd_mp2_dev *privdata, struct amd_mp2_sensor_info info);
    133void amd_stop_sensor(struct amd_mp2_dev *privdata, u16 sensor_idx);
    134void amd_stop_all_sensors(struct amd_mp2_dev *privdata);
    135int amd_mp2_get_sensor_num(struct amd_mp2_dev *privdata, u8 *sensor_id);
    136int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata);
    137int amd_sfh_hid_client_deinit(struct amd_mp2_dev *privdata);
    138u32 amd_sfh_wait_for_response(struct amd_mp2_dev *mp2, u8 sid, u32 sensor_sts);
    139void amd_mp2_suspend(struct amd_mp2_dev *mp2);
    140void amd_mp2_resume(struct amd_mp2_dev *mp2);
    141const char *get_sensor_name(int idx);
    142
    143struct amd_mp2_ops {
    144	 void (*start)(struct amd_mp2_dev *privdata, struct amd_mp2_sensor_info info);
    145	 void (*stop)(struct amd_mp2_dev *privdata, u16 sensor_idx);
    146	 void (*stop_all)(struct amd_mp2_dev *privdata);
    147	 int (*response)(struct amd_mp2_dev *mp2, u8 sid, u32 sensor_sts);
    148	 void (*clear_intr)(struct amd_mp2_dev *privdata);
    149	 int (*init_intr)(struct amd_mp2_dev *privdata);
    150	 int (*discovery_status)(struct amd_mp2_dev *privdata);
    151};
    152#endif