/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Thunderbolt control channel messages
 *
 * Copyright (C) 2014 Andreas Noever <andreas.noever@gmail.com>
 * Copyright (C) 2017, Intel Corporation
 */

#ifndef _TB_MSGS
#define _TB_MSGS

#include <linux/types.h>
#include <linux/uuid.h>

enum tb_cfg_space {
        TB_CFG_HOPS = 0,
        TB_CFG_PORT = 1,
        TB_CFG_SWITCH = 2,
        TB_CFG_COUNTERS = 3,
};

enum tb_cfg_error {
        TB_CFG_ERROR_PORT_NOT_CONNECTED = 0,
        TB_CFG_ERROR_LINK_ERROR = 1,
        TB_CFG_ERROR_INVALID_CONFIG_SPACE = 2,
        TB_CFG_ERROR_NO_SUCH_PORT = 4,
        TB_CFG_ERROR_ACK_PLUG_EVENT = 7, /* send as reply to TB_CFG_PKG_EVENT */
        TB_CFG_ERROR_LOOP = 8,
        TB_CFG_ERROR_HEC_ERROR_DETECTED = 12,
        TB_CFG_ERROR_FLOW_CONTROL_ERROR = 13,
        TB_CFG_ERROR_LOCK = 15,
        TB_CFG_ERROR_DP_BW = 32,
        TB_CFG_ERROR_ROP_CMPLT = 33,
        TB_CFG_ERROR_POP_CMPLT = 34,
        TB_CFG_ERROR_PCIE_WAKE = 35,
        TB_CFG_ERROR_DP_CON_CHANGE = 36,
        TB_CFG_ERROR_DPTX_DISCOVERY = 37,
        TB_CFG_ERROR_LINK_RECOVERY = 38,
        TB_CFG_ERROR_ASYM_LINK = 39,
};

/* common header */
struct tb_cfg_header {
        u32 route_hi:22;
        u32 unknown:10; /* highest order bit is set on replies */
        u32 route_lo;
} __packed;

/* additional header for read/write packets */
struct tb_cfg_address {
        u32 offset:13; /* in dwords */
        u32 length:6; /* in dwords */
        u32 port:6;
        enum tb_cfg_space space:2;
        u32 seq:2; /* sequence number  */
        u32 zero:3;
} __packed;

/* TB_CFG_PKG_READ, response for TB_CFG_PKG_WRITE */
struct cfg_read_pkg {
        struct tb_cfg_header header;
        struct tb_cfg_address addr;
} __packed;

/* TB_CFG_PKG_WRITE, response for TB_CFG_PKG_READ */
struct cfg_write_pkg {
        struct tb_cfg_header header;
        struct tb_cfg_address addr;
        u32 data[64]; /* maximum size, tb_cfg_address.length has 6 bits */
} __packed;

/* TB_CFG_PKG_ERROR */
struct cfg_error_pkg {
        struct tb_cfg_header header;
        enum tb_cfg_error error:8;
        u32 port:6;
        u32 reserved:16;
        u32 pg:2;
} __packed;

struct cfg_ack_pkg {
        struct tb_cfg_header header;
};

#define TB_CFG_ERROR_PG_HOT_PLUG        0x2
#define TB_CFG_ERROR_PG_HOT_UNPLUG      0x3

/* TB_CFG_PKG_EVENT */
struct cfg_event_pkg {
        struct tb_cfg_header header;
        u32 port:6;
        u32 zero:25;
        bool unplug:1;
} __packed;

/* TB_CFG_PKG_RESET */
struct cfg_reset_pkg {
        struct tb_cfg_header header;
} __packed;

/* ICM messages */

enum icm_pkg_code {
        ICM_GET_TOPOLOGY = 0x1,
        ICM_DRIVER_READY = 0x3,
        ICM_APPROVE_DEVICE = 0x4,
        ICM_CHALLENGE_DEVICE = 0x5,
        ICM_ADD_DEVICE_KEY = 0x6,
        ICM_GET_ROUTE = 0xa,
        ICM_APPROVE_XDOMAIN = 0x10,
        ICM_DISCONNECT_XDOMAIN = 0x11,
        ICM_PREBOOT_ACL = 0x18,
        ICM_USB4_SWITCH_OP = 0x20,
};

enum icm_event_code {
        ICM_EVENT_DEVICE_CONNECTED = 0x3,
        ICM_EVENT_DEVICE_DISCONNECTED = 0x4,
        ICM_EVENT_XDOMAIN_CONNECTED = 0x6,
        ICM_EVENT_XDOMAIN_DISCONNECTED = 0x7,
        ICM_EVENT_DP_CONFIG_CHANGED = 0x8,
        ICM_EVENT_RTD3_VETO = 0xa,
};

struct icm_pkg_header {
        u8 code;
        u8 flags;
        u8 packet_id;
        u8 total_packets;
};

#define ICM_FLAGS_ERROR                 BIT(0)
#define ICM_FLAGS_NO_KEY                BIT(1)
#define ICM_FLAGS_SLEVEL_SHIFT          3
#define ICM_FLAGS_SLEVEL_MASK           GENMASK(4, 3)
#define ICM_FLAGS_DUAL_LANE             BIT(5)
#define ICM_FLAGS_SPEED_GEN3            BIT(7)
#define ICM_FLAGS_WRITE                 BIT(7)

struct icm_pkg_driver_ready {
        struct icm_pkg_header hdr;
};

/* Falcon Ridge only messages */

struct icm_fr_pkg_driver_ready_response {
        struct icm_pkg_header hdr;
        u8 romver;
        u8 ramver;
        u16 security_level;
};

#define ICM_FR_SLEVEL_MASK              0xf

/* Falcon Ridge & Alpine Ridge common messages */

struct icm_fr_pkg_get_topology {
        struct icm_pkg_header hdr;
};

#define ICM_GET_TOPOLOGY_PACKETS        14

struct icm_fr_pkg_get_topology_response {
        struct icm_pkg_header hdr;
        u32 route_lo;
        u32 route_hi;
        u8 first_data;
        u8 second_data;
        u8 drom_i2c_address_index;
        u8 switch_index;
        u32 reserved[2];
        u32 ports[16];
        u32 port_hop_info[16];
};

#define ICM_SWITCH_USED                 BIT(0)
#define ICM_SWITCH_UPSTREAM_PORT_MASK   GENMASK(7, 1)
#define ICM_SWITCH_UPSTREAM_PORT_SHIFT  1

#define ICM_PORT_TYPE_MASK              GENMASK(23, 0)
#define ICM_PORT_INDEX_SHIFT            24
#define ICM_PORT_INDEX_MASK             GENMASK(31, 24)

struct icm_fr_event_device_connected {
        struct icm_pkg_header hdr;
        uuid_t ep_uuid;
        u8 connection_key;
        u8 connection_id;
        u16 link_info;
        u32 ep_name[55];
};

#define ICM_LINK_INFO_LINK_MASK         0x7
#define ICM_LINK_INFO_DEPTH_SHIFT       4
#define ICM_LINK_INFO_DEPTH_MASK        GENMASK(7, 4)
#define ICM_LINK_INFO_APPROVED          BIT(8)
#define ICM_LINK_INFO_REJECTED          BIT(9)
#define ICM_LINK_INFO_BOOT              BIT(10)

struct icm_fr_pkg_approve_device {
        struct icm_pkg_header hdr;
        uuid_t ep_uuid;
        u8 connection_key;
        u8 connection_id;
        u16 reserved;
};

struct icm_fr_event_device_disconnected {
        struct icm_pkg_header hdr;
        u16 reserved;
        u16 link_info;
};

struct icm_fr_event_xdomain_connected {
        struct icm_pkg_header hdr;
        u16 reserved;
        u16 link_info;
        uuid_t remote_uuid;
        uuid_t local_uuid;
        u32 local_route_hi;
        u32 local_route_lo;
        u32 remote_route_hi;
        u32 remote_route_lo;
};

struct icm_fr_event_xdomain_disconnected {
        struct icm_pkg_header hdr;
        u16 reserved;
        u16 link_info;
        uuid_t remote_uuid;
};

struct icm_fr_pkg_add_device_key {
        struct icm_pkg_header hdr;
        uuid_t ep_uuid;
        u8 connection_key;
        u8 connection_id;
        u16 reserved;
        u32 key[8];
};

struct icm_fr_pkg_add_device_key_response {
        struct icm_pkg_header hdr;
        uuid_t ep_uuid;
        u8 connection_key;
        u8 connection_id;
        u16 reserved;
};

struct icm_fr_pkg_challenge_device {
        struct icm_pkg_header hdr;
        uuid_t ep_uuid;
        u8 connection_key;
        u8 connection_id;
        u16 reserved;
        u32 challenge[8];
};

struct icm_fr_pkg_challenge_device_response {
        struct icm_pkg_header hdr;
        uuid_t ep_uuid;
        u8 connection_key;
        u8 connection_id;
        u16 reserved;
        u32 challenge[8];
        u32 response[8];
};

struct icm_fr_pkg_approve_xdomain {
        struct icm_pkg_header hdr;
        u16 reserved;
        u16 link_info;
        uuid_t remote_uuid;
        u16 transmit_path;
        u16 transmit_ring;
        u16 receive_path;
        u16 receive_ring;
};

struct icm_fr_pkg_approve_xdomain_response {
        struct icm_pkg_header hdr;
        u16 reserved;
        u16 link_info;
        uuid_t remote_uuid;
        u16 transmit_path;
        u16 transmit_ring;
        u16 receive_path;
        u16 receive_ring;
};

/* Alpine Ridge only messages */

struct icm_ar_pkg_driver_ready_response {
        struct icm_pkg_header hdr;
        u8 romver;
        u8 ramver;
        u16 info;
};

#define ICM_AR_FLAGS_RTD3               BIT(6)

#define ICM_AR_INFO_SLEVEL_MASK         GENMASK(3, 0)
#define ICM_AR_INFO_BOOT_ACL_SHIFT      7
#define ICM_AR_INFO_BOOT_ACL_MASK       GENMASK(11, 7)
#define ICM_AR_INFO_BOOT_ACL_SUPPORTED  BIT(13)

struct icm_ar_pkg_get_route {
        struct icm_pkg_header hdr;
        u16 reserved;
        u16 link_info;
};

struct icm_ar_pkg_get_route_response {
        struct icm_pkg_header hdr;
        u16 reserved;
        u16 link_info;
        u32 route_hi;
        u32 route_lo;
};

struct icm_ar_boot_acl_entry {
        u32 uuid_lo;
        u32 uuid_hi;
};

#define ICM_AR_PREBOOT_ACL_ENTRIES      16

struct icm_ar_pkg_preboot_acl {
        struct icm_pkg_header hdr;
        struct icm_ar_boot_acl_entry acl[ICM_AR_PREBOOT_ACL_ENTRIES];
};

struct icm_ar_pkg_preboot_acl_response {
        struct icm_pkg_header hdr;
        struct icm_ar_boot_acl_entry acl[ICM_AR_PREBOOT_ACL_ENTRIES];
};

/* Titan Ridge messages */

struct icm_tr_pkg_driver_ready_response {
        struct icm_pkg_header hdr;
        u16 reserved1;
        u16 info;
        u32 nvm_version;
        u16 device_id;
        u16 reserved2;
};

#define ICM_TR_FLAGS_RTD3               BIT(6)

#define ICM_TR_INFO_SLEVEL_MASK         GENMASK(2, 0)
#define ICM_TR_INFO_PROTO_VERSION_MASK  GENMASK(6, 4)
#define ICM_TR_INFO_PROTO_VERSION_SHIFT 4
#define ICM_TR_INFO_BOOT_ACL_SHIFT      7
#define ICM_TR_INFO_BOOT_ACL_MASK       GENMASK(12, 7)

struct icm_tr_event_device_connected {
        struct icm_pkg_header hdr;
        uuid_t ep_uuid;
        u32 route_hi;
        u32 route_lo;
        u8 connection_id;
        u8 reserved;
        u16 link_info;
        u32 ep_name[55];
};

struct icm_tr_event_device_disconnected {
        struct icm_pkg_header hdr;
        u32 route_hi;
        u32 route_lo;
};

struct icm_tr_event_xdomain_connected {
        struct icm_pkg_header hdr;
        u16 reserved;
        u16 link_info;
        uuid_t remote_uuid;
        uuid_t local_uuid;
        u32 local_route_hi;
        u32 local_route_lo;
        u32 remote_route_hi;
        u32 remote_route_lo;
};

struct icm_tr_event_xdomain_disconnected {
        struct icm_pkg_header hdr;
        u32 route_hi;
        u32 route_lo;
        uuid_t remote_uuid;
};

struct icm_tr_pkg_approve_device {
        struct icm_pkg_header hdr;
        uuid_t ep_uuid;
        u32 route_hi;
        u32 route_lo;
        u8 connection_id;
        u8 reserved1[3];
};

struct icm_tr_pkg_add_device_key {
        struct icm_pkg_header hdr;
        uuid_t ep_uuid;
        u32 route_hi;
        u32 route_lo;
        u8 connection_id;
        u8 reserved[3];
        u32 key[8];
};

struct icm_tr_pkg_challenge_device {
        struct icm_pkg_header hdr;
        uuid_t ep_uuid;
        u32 route_hi;
        u32 route_lo;
        u8 connection_id;
        u8 reserved[3];
        u32 challenge[8];
};

struct icm_tr_pkg_approve_xdomain {
        struct icm_pkg_header hdr;
        u32 route_hi;
        u32 route_lo;
        uuid_t remote_uuid;
        u16 transmit_path;
        u16 transmit_ring;
        u16 receive_path;
        u16 receive_ring;
};

struct icm_tr_pkg_disconnect_xdomain {
        struct icm_pkg_header hdr;
        u8 stage;
        u8 reserved[3];
        u32 route_hi;
        u32 route_lo;
        uuid_t remote_uuid;
};

struct icm_tr_pkg_challenge_device_response {
        struct icm_pkg_header hdr;
        uuid_t ep_uuid;
        u32 route_hi;
        u32 route_lo;
        u8 connection_id;
        u8 reserved[3];
        u32 challenge[8];
        u32 response[8];
};

struct icm_tr_pkg_add_device_key_response {
        struct icm_pkg_header hdr;
        uuid_t ep_uuid;
        u32 route_hi;
        u32 route_lo;
        u8 connection_id;
        u8 reserved[3];
};

struct icm_tr_pkg_approve_xdomain_response {
        struct icm_pkg_header hdr;
        u32 route_hi;
        u32 route_lo;
        uuid_t remote_uuid;
        u16 transmit_path;
        u16 transmit_ring;
        u16 receive_path;
        u16 receive_ring;
};

struct icm_tr_pkg_disconnect_xdomain_response {
        struct icm_pkg_header hdr;
        u8 stage;
        u8 reserved[3];
        u32 route_hi;
        u32 route_lo;
        uuid_t remote_uuid;
};

/* Ice Lake messages */

struct icm_icl_event_rtd3_veto {
        struct icm_pkg_header hdr;
        u32 veto_reason;
};

/* USB4 ICM messages */

struct icm_usb4_switch_op {
        struct icm_pkg_header hdr;
        u32 route_hi;
        u32 route_lo;
        u32 metadata;
        u16 opcode;
        u16 data_len_valid;
        u32 data[16];
};

#define ICM_USB4_SWITCH_DATA_LEN_MASK   GENMASK(3, 0)
#define ICM_USB4_SWITCH_DATA_VALID      BIT(4)

struct icm_usb4_switch_op_response {
        struct icm_pkg_header hdr;
        u32 route_hi;
        u32 route_lo;
        u32 metadata;
        u16 opcode;
        u16 status;
        u32 data[16];
};

/* XDomain messages */

struct tb_xdomain_header {
        u32 route_hi;
        u32 route_lo;
        u32 length_sn;
};

#define TB_XDOMAIN_LENGTH_MASK  GENMASK(5, 0)
#define TB_XDOMAIN_SN_MASK      GENMASK(28, 27)
#define TB_XDOMAIN_SN_SHIFT     27

enum tb_xdp_type {
        UUID_REQUEST_OLD = 1,
        UUID_RESPONSE = 2,
        PROPERTIES_REQUEST,
        PROPERTIES_RESPONSE,
        PROPERTIES_CHANGED_REQUEST,
        PROPERTIES_CHANGED_RESPONSE,
        ERROR_RESPONSE,
        UUID_REQUEST = 12,
        LINK_STATE_STATUS_REQUEST = 15,
        LINK_STATE_STATUS_RESPONSE,
        LINK_STATE_CHANGE_REQUEST,
        LINK_STATE_CHANGE_RESPONSE,
};

struct tb_xdp_header {
        struct tb_xdomain_header xd_hdr;
        uuid_t uuid;
        u32 type;
};

struct tb_xdp_error_response {
        struct tb_xdp_header hdr;
        u32 error;
};

struct tb_xdp_link_state_status {
        struct tb_xdp_header hdr;
};

struct tb_xdp_link_state_status_response {
        union {
                struct tb_xdp_error_response err;
                struct {
                        struct tb_xdp_header hdr;
                        u32 status;
                        u8 slw;
                        u8 tlw;
                        u8 sls;
                        u8 tls;
                };
        };
};

struct tb_xdp_link_state_change {
        struct tb_xdp_header hdr;
        u8 tlw;
        u8 tls;
        u16 reserved;
};

struct tb_xdp_link_state_change_response {
        union {
                struct tb_xdp_error_response err;
                struct {
                        struct tb_xdp_header hdr;
                        u32 status;
                };
        };
};

struct tb_xdp_uuid {
        struct tb_xdp_header hdr;
};

struct tb_xdp_uuid_response {
        union {
                struct tb_xdp_error_response err;
                struct {
                        struct tb_xdp_header hdr;
                        uuid_t src_uuid;
                        u32 src_route_hi;
                        u32 src_route_lo;
                };
        };
};

struct tb_xdp_properties {
        struct tb_xdp_header hdr;
        uuid_t src_uuid;
        uuid_t dst_uuid;
        u16 offset;
        u16 reserved;
};

struct tb_xdp_properties_response {
        union {
                struct tb_xdp_error_response err;
                struct {
                        struct tb_xdp_header hdr;
                        uuid_t src_uuid;
                        uuid_t dst_uuid;
                        u16 offset;
                        u16 data_length;
                        u32 generation;
                        u32 data[];
                };
        };
};

/*
 * Max length of data array single XDomain property response is allowed
 * to carry.
 */
#define TB_XDP_PROPERTIES_MAX_DATA_LENGTH       \
        (((256 - 4 - sizeof(struct tb_xdp_properties_response))) / 4)

/* Maximum size of the total property block in dwords we allow */
#define TB_XDP_PROPERTIES_MAX_LENGTH            500

struct tb_xdp_properties_changed {
        struct tb_xdp_header hdr;
        uuid_t src_uuid;
};

struct tb_xdp_properties_changed_response {
        union {
                struct tb_xdp_error_response err;
                struct tb_xdp_header hdr;
        };
};

enum tb_xdp_error {
        ERROR_SUCCESS,
        ERROR_UNKNOWN_PACKET,
        ERROR_UNKNOWN_DOMAIN,
        ERROR_NOT_SUPPORTED,
        ERROR_NOT_READY,
};

#endif