1/* 2 * Copyright 2012 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 */ 23 24#ifndef RADEON_ACPI_H 25#define RADEON_ACPI_H 26 27struct radeon_device; 28struct acpi_bus_event; 29 30/* AMD hw uses four ACPI control methods: 31 * 1. ATIF 32 * ARG0: (ACPI_INTEGER) function code 33 * ARG1: (ACPI_BUFFER) parameter buffer, 256 bytes 34 * OUTPUT: (ACPI_BUFFER) output buffer, 256 bytes 35 * ATIF provides an entry point for the gfx driver to interact with the sbios. 36 * The AMD ACPI notification mechanism uses Notify (VGA, 0x81) or a custom 37 * notification. Which notification is used as indicated by the ATIF Control 38 * Method GET_SYSTEM_PARAMETERS. When the driver receives Notify (VGA, 0x81) or 39 * a custom notification it invokes ATIF Control Method GET_SYSTEM_BIOS_REQUESTS 40 * to identify pending System BIOS requests and associated parameters. For 41 * example, if one of the pending requests is DISPLAY_SWITCH_REQUEST, the driver 42 * will perform display device detection and invoke ATIF Control Method 43 * SELECT_ACTIVE_DISPLAYS. 44 * 45 * 2. ATPX 46 * ARG0: (ACPI_INTEGER) function code 47 * ARG1: (ACPI_BUFFER) parameter buffer, 256 bytes 48 * OUTPUT: (ACPI_BUFFER) output buffer, 256 bytes 49 * ATPX methods are used on PowerXpress systems to handle mux switching and 50 * discrete GPU power control. 51 * 52 * 3. ATRM 53 * ARG0: (ACPI_INTEGER) offset of vbios rom data 54 * ARG1: (ACPI_BUFFER) size of the buffer to fill (up to 4K). 55 * OUTPUT: (ACPI_BUFFER) output buffer 56 * ATRM provides an interfacess to access the discrete GPU vbios image on 57 * PowerXpress systems with multiple GPUs. 58 * 59 * 4. ATCS 60 * ARG0: (ACPI_INTEGER) function code 61 * ARG1: (ACPI_BUFFER) parameter buffer, 256 bytes 62 * OUTPUT: (ACPI_BUFFER) output buffer, 256 bytes 63 * ATCS provides an interface to AMD chipset specific functionality. 64 * 65 */ 66/* ATIF */ 67#define ATIF_FUNCTION_VERIFY_INTERFACE 0x0 68/* ARG0: ATIF_FUNCTION_VERIFY_INTERFACE 69 * ARG1: none 70 * OUTPUT: 71 * WORD - structure size in bytes (includes size field) 72 * WORD - version 73 * DWORD - supported notifications mask 74 * DWORD - supported functions bit vector 75 */ 76/* Notifications mask */ 77# define ATIF_DISPLAY_SWITCH_REQUEST_SUPPORTED (1 << 0) 78# define ATIF_EXPANSION_MODE_CHANGE_REQUEST_SUPPORTED (1 << 1) 79# define ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED (1 << 2) 80# define ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED (1 << 3) 81# define ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED (1 << 4) 82# define ATIF_DISPLAY_CONF_CHANGE_REQUEST_SUPPORTED (1 << 5) 83# define ATIF_PX_GFX_SWITCH_REQUEST_SUPPORTED (1 << 6) 84# define ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED (1 << 7) 85# define ATIF_DGPU_DISPLAY_EVENT_SUPPORTED (1 << 8) 86/* supported functions vector */ 87# define ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED (1 << 0) 88# define ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED (1 << 1) 89# define ATIF_SELECT_ACTIVE_DISPLAYS_SUPPORTED (1 << 2) 90# define ATIF_GET_LID_STATE_SUPPORTED (1 << 3) 91# define ATIF_GET_TV_STANDARD_FROM_CMOS_SUPPORTED (1 << 4) 92# define ATIF_SET_TV_STANDARD_IN_CMOS_SUPPORTED (1 << 5) 93# define ATIF_GET_PANEL_EXPANSION_MODE_FROM_CMOS_SUPPORTED (1 << 6) 94# define ATIF_SET_PANEL_EXPANSION_MODE_IN_CMOS_SUPPORTED (1 << 7) 95# define ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED (1 << 12) 96# define ATIF_GET_GRAPHICS_DEVICE_TYPES_SUPPORTED (1 << 14) 97# define ATIF_GET_EXTERNAL_GPU_INFORMATION_SUPPORTED (1 << 20) 98#define ATIF_FUNCTION_GET_SYSTEM_PARAMETERS 0x1 99/* ARG0: ATIF_FUNCTION_GET_SYSTEM_PARAMETERS 100 * ARG1: none 101 * OUTPUT: 102 * WORD - structure size in bytes (includes size field) 103 * DWORD - valid flags mask 104 * DWORD - flags 105 * 106 * OR 107 * 108 * WORD - structure size in bytes (includes size field) 109 * DWORD - valid flags mask 110 * DWORD - flags 111 * BYTE - notify command code 112 * 113 * flags 114 * bits 1:0: 115 * 0 - Notify(VGA, 0x81) is not used for notification 116 * 1 - Notify(VGA, 0x81) is used for notification 117 * 2 - Notify(VGA, n) is used for notification where 118 * n (0xd0-0xd9) is specified in notify command code. 119 * bit 2: 120 * 1 - lid changes not reported though int10 121 */ 122#define ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS 0x2 123/* ARG0: ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS 124 * ARG1: none 125 * OUTPUT: 126 * WORD - structure size in bytes (includes size field) 127 * DWORD - pending sbios requests 128 * BYTE - panel expansion mode 129 * BYTE - thermal state: target gfx controller 130 * BYTE - thermal state: state id (0: exit state, non-0: state) 131 * BYTE - forced power state: target gfx controller 132 * BYTE - forced power state: state id 133 * BYTE - system power source 134 * BYTE - panel backlight level (0-255) 135 */ 136/* pending sbios requests */ 137# define ATIF_DISPLAY_SWITCH_REQUEST (1 << 0) 138# define ATIF_EXPANSION_MODE_CHANGE_REQUEST (1 << 1) 139# define ATIF_THERMAL_STATE_CHANGE_REQUEST (1 << 2) 140# define ATIF_FORCED_POWER_STATE_CHANGE_REQUEST (1 << 3) 141# define ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST (1 << 4) 142# define ATIF_DISPLAY_CONF_CHANGE_REQUEST (1 << 5) 143# define ATIF_PX_GFX_SWITCH_REQUEST (1 << 6) 144# define ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST (1 << 7) 145# define ATIF_DGPU_DISPLAY_EVENT (1 << 8) 146/* panel expansion mode */ 147# define ATIF_PANEL_EXPANSION_DISABLE 0 148# define ATIF_PANEL_EXPANSION_FULL 1 149# define ATIF_PANEL_EXPANSION_ASPECT 2 150/* target gfx controller */ 151# define ATIF_TARGET_GFX_SINGLE 0 152# define ATIF_TARGET_GFX_PX_IGPU 1 153# define ATIF_TARGET_GFX_PX_DGPU 2 154/* system power source */ 155# define ATIF_POWER_SOURCE_AC 1 156# define ATIF_POWER_SOURCE_DC 2 157# define ATIF_POWER_SOURCE_RESTRICTED_AC_1 3 158# define ATIF_POWER_SOURCE_RESTRICTED_AC_2 4 159#define ATIF_FUNCTION_SELECT_ACTIVE_DISPLAYS 0x3 160/* ARG0: ATIF_FUNCTION_SELECT_ACTIVE_DISPLAYS 161 * ARG1: 162 * WORD - structure size in bytes (includes size field) 163 * WORD - selected displays 164 * WORD - connected displays 165 * OUTPUT: 166 * WORD - structure size in bytes (includes size field) 167 * WORD - selected displays 168 */ 169# define ATIF_LCD1 (1 << 0) 170# define ATIF_CRT1 (1 << 1) 171# define ATIF_TV (1 << 2) 172# define ATIF_DFP1 (1 << 3) 173# define ATIF_CRT2 (1 << 4) 174# define ATIF_LCD2 (1 << 5) 175# define ATIF_DFP2 (1 << 7) 176# define ATIF_CV (1 << 8) 177# define ATIF_DFP3 (1 << 9) 178# define ATIF_DFP4 (1 << 10) 179# define ATIF_DFP5 (1 << 11) 180# define ATIF_DFP6 (1 << 12) 181#define ATIF_FUNCTION_GET_LID_STATE 0x4 182/* ARG0: ATIF_FUNCTION_GET_LID_STATE 183 * ARG1: none 184 * OUTPUT: 185 * WORD - structure size in bytes (includes size field) 186 * BYTE - lid state (0: open, 1: closed) 187 * 188 * GET_LID_STATE only works at boot and resume, for general lid 189 * status, use the kernel provided status 190 */ 191#define ATIF_FUNCTION_GET_TV_STANDARD_FROM_CMOS 0x5 192/* ARG0: ATIF_FUNCTION_GET_TV_STANDARD_FROM_CMOS 193 * ARG1: none 194 * OUTPUT: 195 * WORD - structure size in bytes (includes size field) 196 * BYTE - 0 197 * BYTE - TV standard 198 */ 199# define ATIF_TV_STD_NTSC 0 200# define ATIF_TV_STD_PAL 1 201# define ATIF_TV_STD_PALM 2 202# define ATIF_TV_STD_PAL60 3 203# define ATIF_TV_STD_NTSCJ 4 204# define ATIF_TV_STD_PALCN 5 205# define ATIF_TV_STD_PALN 6 206# define ATIF_TV_STD_SCART_RGB 9 207#define ATIF_FUNCTION_SET_TV_STANDARD_IN_CMOS 0x6 208/* ARG0: ATIF_FUNCTION_SET_TV_STANDARD_IN_CMOS 209 * ARG1: 210 * WORD - structure size in bytes (includes size field) 211 * BYTE - 0 212 * BYTE - TV standard 213 * OUTPUT: none 214 */ 215#define ATIF_FUNCTION_GET_PANEL_EXPANSION_MODE_FROM_CMOS 0x7 216/* ARG0: ATIF_FUNCTION_GET_PANEL_EXPANSION_MODE_FROM_CMOS 217 * ARG1: none 218 * OUTPUT: 219 * WORD - structure size in bytes (includes size field) 220 * BYTE - panel expansion mode 221 */ 222#define ATIF_FUNCTION_SET_PANEL_EXPANSION_MODE_IN_CMOS 0x8 223/* ARG0: ATIF_FUNCTION_SET_PANEL_EXPANSION_MODE_IN_CMOS 224 * ARG1: 225 * WORD - structure size in bytes (includes size field) 226 * BYTE - panel expansion mode 227 * OUTPUT: none 228 */ 229#define ATIF_FUNCTION_TEMPERATURE_CHANGE_NOTIFICATION 0xD 230/* ARG0: ATIF_FUNCTION_TEMPERATURE_CHANGE_NOTIFICATION 231 * ARG1: 232 * WORD - structure size in bytes (includes size field) 233 * WORD - gfx controller id 234 * BYTE - current temperature (degress Celsius) 235 * OUTPUT: none 236 */ 237#define ATIF_FUNCTION_GET_GRAPHICS_DEVICE_TYPES 0xF 238/* ARG0: ATIF_FUNCTION_GET_GRAPHICS_DEVICE_TYPES 239 * ARG1: none 240 * OUTPUT: 241 * WORD - number of gfx devices 242 * WORD - device structure size in bytes (excludes device size field) 243 * DWORD - flags \ 244 * WORD - bus number } repeated structure 245 * WORD - device number / 246 */ 247/* flags */ 248# define ATIF_PX_REMOVABLE_GRAPHICS_DEVICE (1 << 0) 249# define ATIF_XGP_PORT (1 << 1) 250# define ATIF_VGA_ENABLED_GRAPHICS_DEVICE (1 << 2) 251# define ATIF_XGP_PORT_IN_DOCK (1 << 3) 252#define ATIF_FUNCTION_GET_EXTERNAL_GPU_INFORMATION 0x15 253/* ARG0: ATIF_FUNCTION_GET_EXTERNAL_GPU_INFORMATION 254 * ARG1: none 255 * OUTPUT: 256 * WORD - number of reported external gfx devices 257 * WORD - device structure size in bytes (excludes device size field) 258 * WORD - flags \ 259 * WORD - bus number / repeated structure 260 */ 261/* flags */ 262# define ATIF_EXTERNAL_GRAPHICS_PORT (1 << 0) 263 264/* ATPX */ 265#define ATPX_FUNCTION_VERIFY_INTERFACE 0x0 266/* ARG0: ATPX_FUNCTION_VERIFY_INTERFACE 267 * ARG1: none 268 * OUTPUT: 269 * WORD - structure size in bytes (includes size field) 270 * WORD - version 271 * DWORD - supported functions bit vector 272 */ 273/* supported functions vector */ 274# define ATPX_GET_PX_PARAMETERS_SUPPORTED (1 << 0) 275# define ATPX_POWER_CONTROL_SUPPORTED (1 << 1) 276# define ATPX_DISPLAY_MUX_CONTROL_SUPPORTED (1 << 2) 277# define ATPX_I2C_MUX_CONTROL_SUPPORTED (1 << 3) 278# define ATPX_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION_SUPPORTED (1 << 4) 279# define ATPX_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION_SUPPORTED (1 << 5) 280# define ATPX_GET_DISPLAY_CONNECTORS_MAPPING_SUPPORTED (1 << 7) 281# define ATPX_GET_DISPLAY_DETECTION_PORTS_SUPPORTED (1 << 8) 282#define ATPX_FUNCTION_GET_PX_PARAMETERS 0x1 283/* ARG0: ATPX_FUNCTION_GET_PX_PARAMETERS 284 * ARG1: none 285 * OUTPUT: 286 * WORD - structure size in bytes (includes size field) 287 * DWORD - valid flags mask 288 * DWORD - flags 289 */ 290/* flags */ 291# define ATPX_LVDS_I2C_AVAILABLE_TO_BOTH_GPUS (1 << 0) 292# define ATPX_CRT1_I2C_AVAILABLE_TO_BOTH_GPUS (1 << 1) 293# define ATPX_DVI1_I2C_AVAILABLE_TO_BOTH_GPUS (1 << 2) 294# define ATPX_CRT1_RGB_SIGNAL_MUXED (1 << 3) 295# define ATPX_TV_SIGNAL_MUXED (1 << 4) 296# define ATPX_DFP_SIGNAL_MUXED (1 << 5) 297# define ATPX_SEPARATE_MUX_FOR_I2C (1 << 6) 298# define ATPX_DYNAMIC_PX_SUPPORTED (1 << 7) 299# define ATPX_ACF_NOT_SUPPORTED (1 << 8) 300# define ATPX_FIXED_NOT_SUPPORTED (1 << 9) 301# define ATPX_DYNAMIC_DGPU_POWER_OFF_SUPPORTED (1 << 10) 302# define ATPX_DGPU_REQ_POWER_FOR_DISPLAYS (1 << 11) 303# define ATPX_DGPU_CAN_DRIVE_DISPLAYS (1 << 12) 304# define ATPX_MS_HYBRID_GFX_SUPPORTED (1 << 14) 305#define ATPX_FUNCTION_POWER_CONTROL 0x2 306/* ARG0: ATPX_FUNCTION_POWER_CONTROL 307 * ARG1: 308 * WORD - structure size in bytes (includes size field) 309 * BYTE - dGPU power state (0: power off, 1: power on) 310 * OUTPUT: none 311 */ 312#define ATPX_FUNCTION_DISPLAY_MUX_CONTROL 0x3 313/* ARG0: ATPX_FUNCTION_DISPLAY_MUX_CONTROL 314 * ARG1: 315 * WORD - structure size in bytes (includes size field) 316 * WORD - display mux control (0: iGPU, 1: dGPU) 317 * OUTPUT: none 318 */ 319# define ATPX_INTEGRATED_GPU 0 320# define ATPX_DISCRETE_GPU 1 321#define ATPX_FUNCTION_I2C_MUX_CONTROL 0x4 322/* ARG0: ATPX_FUNCTION_I2C_MUX_CONTROL 323 * ARG1: 324 * WORD - structure size in bytes (includes size field) 325 * WORD - i2c/aux/hpd mux control (0: iGPU, 1: dGPU) 326 * OUTPUT: none 327 */ 328#define ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION 0x5 329/* ARG0: ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION 330 * ARG1: 331 * WORD - structure size in bytes (includes size field) 332 * WORD - target gpu (0: iGPU, 1: dGPU) 333 * OUTPUT: none 334 */ 335#define ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION 0x6 336/* ARG0: ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION 337 * ARG1: 338 * WORD - structure size in bytes (includes size field) 339 * WORD - target gpu (0: iGPU, 1: dGPU) 340 * OUTPUT: none 341 */ 342#define ATPX_FUNCTION_GET_DISPLAY_CONNECTORS_MAPPING 0x8 343/* ARG0: ATPX_FUNCTION_GET_DISPLAY_CONNECTORS_MAPPING 344 * ARG1: none 345 * OUTPUT: 346 * WORD - number of display connectors 347 * WORD - connector structure size in bytes (excludes connector size field) 348 * BYTE - flags \ 349 * BYTE - ATIF display vector bit position } repeated 350 * BYTE - adapter id (0: iGPU, 1-n: dGPU ordered by pcie bus number) } structure 351 * WORD - connector ACPI id / 352 */ 353/* flags */ 354# define ATPX_DISPLAY_OUTPUT_SUPPORTED_BY_ADAPTER_ID_DEVICE (1 << 0) 355# define ATPX_DISPLAY_HPD_SUPPORTED_BY_ADAPTER_ID_DEVICE (1 << 1) 356# define ATPX_DISPLAY_I2C_SUPPORTED_BY_ADAPTER_ID_DEVICE (1 << 2) 357#define ATPX_FUNCTION_GET_DISPLAY_DETECTION_PORTS 0x9 358/* ARG0: ATPX_FUNCTION_GET_DISPLAY_DETECTION_PORTS 359 * ARG1: none 360 * OUTPUT: 361 * WORD - number of HPD/DDC ports 362 * WORD - port structure size in bytes (excludes port size field) 363 * BYTE - ATIF display vector bit position \ 364 * BYTE - hpd id } reapeated structure 365 * BYTE - ddc id / 366 * 367 * available on A+A systems only 368 */ 369/* hpd id */ 370# define ATPX_HPD_NONE 0 371# define ATPX_HPD1 1 372# define ATPX_HPD2 2 373# define ATPX_HPD3 3 374# define ATPX_HPD4 4 375# define ATPX_HPD5 5 376# define ATPX_HPD6 6 377/* ddc id */ 378# define ATPX_DDC_NONE 0 379# define ATPX_DDC1 1 380# define ATPX_DDC2 2 381# define ATPX_DDC3 3 382# define ATPX_DDC4 4 383# define ATPX_DDC5 5 384# define ATPX_DDC6 6 385# define ATPX_DDC7 7 386# define ATPX_DDC8 8 387 388/* ATCS */ 389#define ATCS_FUNCTION_VERIFY_INTERFACE 0x0 390/* ARG0: ATCS_FUNCTION_VERIFY_INTERFACE 391 * ARG1: none 392 * OUTPUT: 393 * WORD - structure size in bytes (includes size field) 394 * WORD - version 395 * DWORD - supported functions bit vector 396 */ 397/* supported functions vector */ 398# define ATCS_GET_EXTERNAL_STATE_SUPPORTED (1 << 0) 399# define ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED (1 << 1) 400# define ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED (1 << 2) 401# define ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED (1 << 3) 402#define ATCS_FUNCTION_GET_EXTERNAL_STATE 0x1 403/* ARG0: ATCS_FUNCTION_GET_EXTERNAL_STATE 404 * ARG1: none 405 * OUTPUT: 406 * WORD - structure size in bytes (includes size field) 407 * DWORD - valid flags mask 408 * DWORD - flags (0: undocked, 1: docked) 409 */ 410/* flags */ 411# define ATCS_DOCKED (1 << 0) 412#define ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST 0x2 413/* ARG0: ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST 414 * ARG1: 415 * WORD - structure size in bytes (includes size field) 416 * WORD - client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) 417 * WORD - valid flags mask 418 * WORD - flags 419 * BYTE - request type 420 * BYTE - performance request 421 * OUTPUT: 422 * WORD - structure size in bytes (includes size field) 423 * BYTE - return value 424 */ 425/* flags */ 426# define ATCS_ADVERTISE_CAPS (1 << 0) 427# define ATCS_WAIT_FOR_COMPLETION (1 << 1) 428/* request type */ 429# define ATCS_PCIE_LINK_SPEED 1 430/* performance request */ 431# define ATCS_REMOVE 0 432# define ATCS_FORCE_LOW_POWER 1 433# define ATCS_PERF_LEVEL_1 2 /* PCIE Gen 1 */ 434# define ATCS_PERF_LEVEL_2 3 /* PCIE Gen 2 */ 435# define ATCS_PERF_LEVEL_3 4 /* PCIE Gen 3 */ 436/* return value */ 437# define ATCS_REQUEST_REFUSED 1 438# define ATCS_REQUEST_COMPLETE 2 439# define ATCS_REQUEST_IN_PROGRESS 3 440#define ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION 0x3 441/* ARG0: ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION 442 * ARG1: none 443 * OUTPUT: none 444 */ 445#define ATCS_FUNCTION_SET_PCIE_BUS_WIDTH 0x4 446/* ARG0: ATCS_FUNCTION_SET_PCIE_BUS_WIDTH 447 * ARG1: 448 * WORD - structure size in bytes (includes size field) 449 * WORD - client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) 450 * BYTE - number of active lanes 451 * OUTPUT: 452 * WORD - structure size in bytes (includes size field) 453 * BYTE - number of active lanes 454 */ 455 456#endif 457