drivers/thunderbolt/tb_msgs.h

   1 /*
   2  * Thunderbolt control channel messages
   3  *
   4  * Copyright (C) 2014 Andreas Noever <andreas.noever@gmail.com>
   5  * Copyright (C) 2017, Intel Corporation
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #ifndef _TB_MSGS
  13 #define _TB_MSGS
  14
  15 #include <linux/types.h>
  16 #include <linux/uuid.h>
  17
  18 enum tb_cfg_pkg_type {
  19         TB_CFG_PKG_READ = 1,
  20         TB_CFG_PKG_WRITE = 2,
  21         TB_CFG_PKG_ERROR = 3,
  22         TB_CFG_PKG_NOTIFY_ACK = 4,
  23         TB_CFG_PKG_EVENT = 5,
  24         TB_CFG_PKG_XDOMAIN_REQ = 6,
  25         TB_CFG_PKG_XDOMAIN_RESP = 7,
  26         TB_CFG_PKG_OVERRIDE = 8,
  27         TB_CFG_PKG_RESET = 9,
  28         TB_CFG_PKG_ICM_EVENT = 10,
  29         TB_CFG_PKG_ICM_CMD = 11,
  30         TB_CFG_PKG_ICM_RESP = 12,
  31         TB_CFG_PKG_PREPARE_TO_SLEEP = 0xd,
  32
  33 };
  34
  35 enum tb_cfg_space {
  36         TB_CFG_HOPS = 0,
  37         TB_CFG_PORT = 1,
  38         TB_CFG_SWITCH = 2,
  39         TB_CFG_COUNTERS = 3,
  40 };
  41
  42 enum tb_cfg_error {
  43         TB_CFG_ERROR_PORT_NOT_CONNECTED = 0,
  44         TB_CFG_ERROR_LINK_ERROR = 1,
  45         TB_CFG_ERROR_INVALID_CONFIG_SPACE = 2,
  46         TB_CFG_ERROR_NO_SUCH_PORT = 4,
  47         TB_CFG_ERROR_ACK_PLUG_EVENT = 7, /* send as reply to TB_CFG_PKG_EVENT */
  48         TB_CFG_ERROR_LOOP = 8,
  49         TB_CFG_ERROR_HEC_ERROR_DETECTED = 12,
  50         TB_CFG_ERROR_FLOW_CONTROL_ERROR = 13,
  51 };
  52
  53 /* common header */
  54 struct tb_cfg_header {
  55         u32 route_hi:22;
  56         u32 unknown:10; /* highest order bit is set on replies */
  57         u32 route_lo;
  58 } __packed;
  59
  60 /* additional header for read/write packets */
  61 struct tb_cfg_address {
  62         u32 offset:13; /* in dwords */
  63         u32 length:6; /* in dwords */
  64         u32 port:6;
  65         enum tb_cfg_space space:2;
  66         u32 seq:2; /* sequence number  */
  67         u32 zero:3;
  68 } __packed;
  69
  70 /* TB_CFG_PKG_READ, response for TB_CFG_PKG_WRITE */
  71 struct cfg_read_pkg {
  72         struct tb_cfg_header header;
  73         struct tb_cfg_address addr;
  74 } __packed;
  75
  76 /* TB_CFG_PKG_WRITE, response for TB_CFG_PKG_READ */
  77 struct cfg_write_pkg {
  78         struct tb_cfg_header header;
  79         struct tb_cfg_address addr;
  80         u32 data[64]; /* maximum size, tb_cfg_address.length has 6 bits */
  81 } __packed;
  82
  83 /* TB_CFG_PKG_ERROR */
  84 struct cfg_error_pkg {
  85         struct tb_cfg_header header;
  86         enum tb_cfg_error error:4;
  87         u32 zero1:4;
  88         u32 port:6;
  89         u32 zero2:2; /* Both should be zero, still they are different fields. */
  90         u32 zero3:16;
  91 } __packed;
  92
  93 /* TB_CFG_PKG_EVENT */
  94 struct cfg_event_pkg {
  95         struct tb_cfg_header header;
  96         u32 port:6;
  97         u32 zero:25;
  98         bool unplug:1;
  99 } __packed;
 100
 101 /* TB_CFG_PKG_RESET */
 102 struct cfg_reset_pkg {
 103         struct tb_cfg_header header;
 104 } __packed;
 105
 106 /* TB_CFG_PKG_PREPARE_TO_SLEEP */
 107 struct cfg_pts_pkg {
 108         struct tb_cfg_header header;
 109         u32 data;
 110 } __packed;
 111
 112 /* ICM messages */
 113
 114 enum icm_pkg_code {
 115         ICM_GET_TOPOLOGY = 0x1,
 116         ICM_DRIVER_READY = 0x3,
 117         ICM_APPROVE_DEVICE = 0x4,
 118         ICM_CHALLENGE_DEVICE = 0x5,
 119         ICM_ADD_DEVICE_KEY = 0x6,
 120         ICM_GET_ROUTE = 0xa,
 121 };
 122
 123 enum icm_event_code {
 124         ICM_EVENT_DEVICE_CONNECTED = 3,
 125         ICM_EVENT_DEVICE_DISCONNECTED = 4,
 126 };
 127
 128 struct icm_pkg_header {
 129         u8 code;
 130         u8 flags;
 131         u8 packet_id;
 132         u8 total_packets;
 133 } __packed;
 134
 135 #define ICM_FLAGS_ERROR                 BIT(0)
 136 #define ICM_FLAGS_NO_KEY                BIT(1)
 137 #define ICM_FLAGS_SLEVEL_SHIFT          3
 138 #define ICM_FLAGS_SLEVEL_MASK           GENMASK(4, 3)
 139
 140 struct icm_pkg_driver_ready {
 141         struct icm_pkg_header hdr;
 142 } __packed;
 143
 144 struct icm_pkg_driver_ready_response {
 145         struct icm_pkg_header hdr;
 146         u8 romver;
 147         u8 ramver;
 148         u16 security_level;
 149 } __packed;
 150
 151 /* Falcon Ridge & Alpine Ridge common messages */
 152
 153 struct icm_fr_pkg_get_topology {
 154         struct icm_pkg_header hdr;
 155 } __packed;
 156
 157 #define ICM_GET_TOPOLOGY_PACKETS        14
 158
 159 struct icm_fr_pkg_get_topology_response {
 160         struct icm_pkg_header hdr;
 161         u32 route_lo;
 162         u32 route_hi;
 163         u8 first_data;
 164         u8 second_data;
 165         u8 drom_i2c_address_index;
 166         u8 switch_index;
 167         u32 reserved[2];
 168         u32 ports[16];
 169         u32 port_hop_info[16];
 170 } __packed;
 171
 172 #define ICM_SWITCH_USED                 BIT(0)
 173 #define ICM_SWITCH_UPSTREAM_PORT_MASK   GENMASK(7, 1)
 174 #define ICM_SWITCH_UPSTREAM_PORT_SHIFT  1
 175
 176 #define ICM_PORT_TYPE_MASK              GENMASK(23, 0)
 177 #define ICM_PORT_INDEX_SHIFT            24
 178 #define ICM_PORT_INDEX_MASK             GENMASK(31, 24)
 179
 180 struct icm_fr_event_device_connected {
 181         struct icm_pkg_header hdr;
 182         uuid_t ep_uuid;
 183         u8 connection_key;
 184         u8 connection_id;
 185         u16 link_info;
 186         u32 ep_name[55];
 187 } __packed;
 188
 189 #define ICM_LINK_INFO_LINK_MASK         0x7
 190 #define ICM_LINK_INFO_DEPTH_SHIFT       4
 191 #define ICM_LINK_INFO_DEPTH_MASK        GENMASK(7, 4)
 192 #define ICM_LINK_INFO_APPROVED          BIT(8)
 193
 194 struct icm_fr_pkg_approve_device {
 195         struct icm_pkg_header hdr;
 196         uuid_t ep_uuid;
 197         u8 connection_key;
 198         u8 connection_id;
 199         u16 reserved;
 200 } __packed;
 201
 202 struct icm_fr_event_device_disconnected {
 203         struct icm_pkg_header hdr;
 204         u16 reserved;
 205         u16 link_info;
 206 } __packed;
 207
 208 struct icm_fr_pkg_add_device_key {
 209         struct icm_pkg_header hdr;
 210         uuid_t ep_uuid;
 211         u8 connection_key;
 212         u8 connection_id;
 213         u16 reserved;
 214         u32 key[8];
 215 } __packed;
 216
 217 struct icm_fr_pkg_add_device_key_response {
 218         struct icm_pkg_header hdr;
 219         uuid_t ep_uuid;
 220         u8 connection_key;
 221         u8 connection_id;
 222         u16 reserved;
 223 } __packed;
 224
 225 struct icm_fr_pkg_challenge_device {
 226         struct icm_pkg_header hdr;
 227         uuid_t ep_uuid;
 228         u8 connection_key;
 229         u8 connection_id;
 230         u16 reserved;
 231         u32 challenge[8];
 232 } __packed;
 233
 234 struct icm_fr_pkg_challenge_device_response {
 235         struct icm_pkg_header hdr;
 236         uuid_t ep_uuid;
 237         u8 connection_key;
 238         u8 connection_id;
 239         u16 reserved;
 240         u32 challenge[8];
 241         u32 response[8];
 242 } __packed;
 243
 244 /* Alpine Ridge only messages */
 245
 246 struct icm_ar_pkg_get_route {
 247         struct icm_pkg_header hdr;
 248         u16 reserved;
 249         u16 link_info;
 250 } __packed;
 251
 252 struct icm_ar_pkg_get_route_response {
 253         struct icm_pkg_header hdr;
 254         u16 reserved;
 255         u16 link_info;
 256         u32 route_hi;
 257         u32 route_lo;
 258 } __packed;
 259
 260 #endif