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 AMD_ACPI_H
25#define AMD_ACPI_H
26
27#define ACPI_AC_CLASS "ac_adapter"
28
29struct atif_verify_interface {
30 u16 size; /* structure size in bytes (includes size field) */
31 u16 version; /* version */
32 u32 notification_mask; /* supported notifications mask */
33 u32 function_bits; /* supported functions bit vector */
34} __packed;
35
36struct atif_system_params {
37 u16 size; /* structure size in bytes (includes size field) */
38 u32 valid_mask; /* valid flags mask */
39 u32 flags; /* flags */
40 u8 command_code; /* notify command code */
41} __packed;
42
43struct atif_sbios_requests {
44 u16 size; /* structure size in bytes (includes size field) */
45 u32 pending; /* pending sbios requests */
46 u8 panel_exp_mode; /* panel expansion mode */
47 u8 thermal_gfx; /* thermal state: target gfx controller */
48 u8 thermal_state; /* thermal state: state id (0: exit state, non-0: state) */
49 u8 forced_power_gfx; /* forced power state: target gfx controller */
50 u8 forced_power_state; /* forced power state: state id */
51 u8 system_power_src; /* system power source */
52 u8 backlight_level; /* panel backlight level (0-255) */
53} __packed;
54
55struct atif_qbtc_arguments {
56 u16 size; /* structure size in bytes (includes size field) */
57 u8 requested_display; /* which display is requested */
58} __packed;
59
60#define ATIF_QBTC_MAX_DATA_POINTS 99
61
62struct atif_qbtc_data_point {
63 u8 luminance; /* luminance in percent */
64 u8 ipnut_signal; /* input signal in range 0-255 */
65} __packed;
66
67struct atif_qbtc_output {
68 u16 size; /* structure size in bytes (includes size field) */
69 u16 flags; /* all zeroes */
70 u8 error_code; /* error code */
71 u8 ac_level; /* default brightness on AC power */
72 u8 dc_level; /* default brightness on DC power */
73 u8 min_input_signal; /* max input signal in range 0-255 */
74 u8 max_input_signal; /* min input signal in range 0-255 */
75 u8 number_of_points; /* number of data points */
76 struct atif_qbtc_data_point data_points[ATIF_QBTC_MAX_DATA_POINTS];
77} __packed;
78
79#define ATIF_NOTIFY_MASK 0x3
80#define ATIF_NOTIFY_NONE 0
81#define ATIF_NOTIFY_81 1
82#define ATIF_NOTIFY_N 2
83
84struct atcs_verify_interface {
85 u16 size; /* structure size in bytes (includes size field) */
86 u16 version; /* version */
87 u32 function_bits; /* supported functions bit vector */
88} __packed;
89
90#define ATCS_VALID_FLAGS_MASK 0x3
91
92struct atcs_pref_req_input {
93 u16 size; /* structure size in bytes (includes size field) */
94 u16 client_id; /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
95 u16 valid_flags_mask; /* valid flags mask */
96 u16 flags; /* flags */
97 u8 req_type; /* request type */
98 u8 perf_req; /* performance request */
99} __packed;
100
101struct atcs_pref_req_output {
102 u16 size; /* structure size in bytes (includes size field) */
103 u8 ret_val; /* return value */
104} __packed;
105
106/* AMD hw uses four ACPI control methods:
107 * 1. ATIF
108 * ARG0: (ACPI_INTEGER) function code
109 * ARG1: (ACPI_BUFFER) parameter buffer, 256 bytes
110 * OUTPUT: (ACPI_BUFFER) output buffer, 256 bytes
111 * ATIF provides an entry point for the gfx driver to interact with the sbios.
112 * The AMD ACPI notification mechanism uses Notify (VGA, 0x81) or a custom
113 * notification. Which notification is used as indicated by the ATIF Control
114 * Method GET_SYSTEM_PARAMETERS. When the driver receives Notify (VGA, 0x81) or
115 * a custom notification it invokes ATIF Control Method GET_SYSTEM_BIOS_REQUESTS
116 * to identify pending System BIOS requests and associated parameters. For
117 * example, if one of the pending requests is DISPLAY_SWITCH_REQUEST, the driver
118 * will perform display device detection and invoke ATIF Control Method
119 * SELECT_ACTIVE_DISPLAYS.
120 *
121 * 2. ATPX
122 * ARG0: (ACPI_INTEGER) function code
123 * ARG1: (ACPI_BUFFER) parameter buffer, 256 bytes
124 * OUTPUT: (ACPI_BUFFER) output buffer, 256 bytes
125 * ATPX methods are used on PowerXpress systems to handle mux switching and
126 * discrete GPU power control.
127 *
128 * 3. ATRM
129 * ARG0: (ACPI_INTEGER) offset of vbios rom data
130 * ARG1: (ACPI_BUFFER) size of the buffer to fill (up to 4K).
131 * OUTPUT: (ACPI_BUFFER) output buffer
132 * ATRM provides an interfacess to access the discrete GPU vbios image on
133 * PowerXpress systems with multiple GPUs.
134 *
135 * 4. ATCS
136 * ARG0: (ACPI_INTEGER) function code
137 * ARG1: (ACPI_BUFFER) parameter buffer, 256 bytes
138 * OUTPUT: (ACPI_BUFFER) output buffer, 256 bytes
139 * ATCS provides an interface to AMD chipset specific functionality.
140 *
141 */
142/* ATIF */
143#define ATIF_FUNCTION_VERIFY_INTERFACE 0x0
144/* ARG0: ATIF_FUNCTION_VERIFY_INTERFACE
145 * ARG1: none
146 * OUTPUT:
147 * WORD - structure size in bytes (includes size field)
148 * WORD - version
149 * DWORD - supported notifications mask
150 * DWORD - supported functions bit vector
151 */
152/* Notifications mask */
153# define ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED (1 << 2)
154# define ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED (1 << 3)
155# define ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED (1 << 4)
156# define ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED (1 << 7)
157# define ATIF_DGPU_DISPLAY_EVENT_SUPPORTED (1 << 8)
158# define ATIF_GPU_PACKAGE_POWER_LIMIT_REQUEST_SUPPORTED (1 << 12)
159/* supported functions vector */
160# define ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED (1 << 0)
161# define ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED (1 << 1)
162# define ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED (1 << 12)
163# define ATIF_QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS_SUPPORTED (1 << 15)
164# define ATIF_READY_TO_UNDOCK_NOTIFICATION_SUPPORTED (1 << 16)
165# define ATIF_GET_EXTERNAL_GPU_INFORMATION_SUPPORTED (1 << 20)
166#define ATIF_FUNCTION_GET_SYSTEM_PARAMETERS 0x1
167/* ARG0: ATIF_FUNCTION_GET_SYSTEM_PARAMETERS
168 * ARG1: none
169 * OUTPUT:
170 * WORD - structure size in bytes (includes size field)
171 * DWORD - valid flags mask
172 * DWORD - flags
173 *
174 * OR
175 *
176 * WORD - structure size in bytes (includes size field)
177 * DWORD - valid flags mask
178 * DWORD - flags
179 * BYTE - notify command code
180 *
181 * flags
182 * bits 1:0:
183 * 0 - Notify(VGA, 0x81) is not used for notification
184 * 1 - Notify(VGA, 0x81) is used for notification
185 * 2 - Notify(VGA, n) is used for notification where
186 * n (0xd0-0xd9) is specified in notify command code.
187 * bit 2:
188 * 1 - lid changes not reported though int10
189 * bit 3:
190 * 1 - system bios controls overclocking
191 * bit 4:
192 * 1 - enable overclocking
193 */
194#define ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS 0x2
195/* ARG0: ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS
196 * ARG1: none
197 * OUTPUT:
198 * WORD - structure size in bytes (includes size field)
199 * DWORD - pending sbios requests
200 * BYTE - reserved (all zeroes)
201 * BYTE - thermal state: target gfx controller
202 * BYTE - thermal state: state id (0: exit state, non-0: state)
203 * BYTE - forced power state: target gfx controller
204 * BYTE - forced power state: state id (0: forced state, non-0: state)
205 * BYTE - system power source
206 * BYTE - panel backlight level (0-255)
207 * BYTE - GPU package power limit: target gfx controller
208 * DWORD - GPU package power limit: value (24:8 fractional format, Watts)
209 */
210/* pending sbios requests */
211# define ATIF_THERMAL_STATE_CHANGE_REQUEST (1 << 2)
212# define ATIF_FORCED_POWER_STATE_CHANGE_REQUEST (1 << 3)
213# define ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST (1 << 4)
214# define ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST (1 << 7)
215# define ATIF_DGPU_DISPLAY_EVENT (1 << 8)
216# define ATIF_GPU_PACKAGE_POWER_LIMIT_REQUEST (1 << 12)
217/* target gfx controller */
218# define ATIF_TARGET_GFX_SINGLE 0
219# define ATIF_TARGET_GFX_PX_IGPU 1
220# define ATIF_TARGET_GFX_PX_DGPU 2
221/* system power source */
222# define ATIF_POWER_SOURCE_AC 1
223# define ATIF_POWER_SOURCE_DC 2
224# define ATIF_POWER_SOURCE_RESTRICTED_AC_1 3
225# define ATIF_POWER_SOURCE_RESTRICTED_AC_2 4
226#define ATIF_FUNCTION_TEMPERATURE_CHANGE_NOTIFICATION 0xD
227/* ARG0: ATIF_FUNCTION_TEMPERATURE_CHANGE_NOTIFICATION
228 * ARG1:
229 * WORD - structure size in bytes (includes size field)
230 * WORD - gfx controller id
231 * BYTE - current temperature (degress Celsius)
232 * OUTPUT: none
233 */
234#define ATIF_FUNCTION_QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS 0x10
235/* ARG0: ATIF_FUNCTION_QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS
236 * ARG1:
237 * WORD - structure size in bytes (includes size field)
238 * BYTE - requested display
239 * OUTPUT:
240 * WORD - structure size in bytes (includes size field)
241 * WORD - flags (currently all 16 bits are reserved)
242 * BYTE - error code (on failure, disregard all below fields)
243 * BYTE - AC level (default brightness in percent when machine has full power)
244 * BYTE - DC level (default brightness in percent when machine is on battery)
245 * BYTE - min input signal, in range 0-255, corresponding to 0% backlight
246 * BYTE - max input signal, in range 0-255, corresponding to 100% backlight
247 * BYTE - number of reported data points
248 * BYTE - luminance level in percent \ repeated structure
249 * BYTE - input signal in range 0-255 / does not have entries for 0% and 100%
250 */
251/* requested display */
252# define ATIF_QBTC_REQUEST_LCD1 0
253# define ATIF_QBTC_REQUEST_CRT1 1
254# define ATIF_QBTC_REQUEST_DFP1 3
255# define ATIF_QBTC_REQUEST_CRT2 4
256# define ATIF_QBTC_REQUEST_LCD2 5
257# define ATIF_QBTC_REQUEST_DFP2 7
258# define ATIF_QBTC_REQUEST_DFP3 9
259# define ATIF_QBTC_REQUEST_DFP4 10
260# define ATIF_QBTC_REQUEST_DFP5 11
261# define ATIF_QBTC_REQUEST_DFP6 12
262/* error code */
263# define ATIF_QBTC_ERROR_CODE_SUCCESS 0
264# define ATIF_QBTC_ERROR_CODE_FAILURE 1
265# define ATIF_QBTC_ERROR_CODE_DEVICE_NOT_SUPPORTED 2
266#define ATIF_FUNCTION_READY_TO_UNDOCK_NOTIFICATION 0x11
267/* ARG0: ATIF_FUNCTION_READY_TO_UNDOCK_NOTIFICATION
268 * ARG1: none
269 * OUTPUT: none
270 */
271#define ATIF_FUNCTION_GET_EXTERNAL_GPU_INFORMATION 0x15
272/* ARG0: ATIF_FUNCTION_GET_EXTERNAL_GPU_INFORMATION
273 * ARG1: none
274 * OUTPUT:
275 * WORD - number of reported external gfx devices
276 * WORD - device structure size in bytes (excludes device size field)
277 * WORD - flags \
278 * WORD - bus number / repeated structure
279 */
280/* flags */
281# define ATIF_EXTERNAL_GRAPHICS_PORT (1 << 0)
282
283/* ATPX */
284#define ATPX_FUNCTION_VERIFY_INTERFACE 0x0
285/* ARG0: ATPX_FUNCTION_VERIFY_INTERFACE
286 * ARG1: none
287 * OUTPUT:
288 * WORD - structure size in bytes (includes size field)
289 * WORD - version
290 * DWORD - supported functions bit vector
291 */
292/* supported functions vector */
293# define ATPX_GET_PX_PARAMETERS_SUPPORTED (1 << 0)
294# define ATPX_POWER_CONTROL_SUPPORTED (1 << 1)
295# define ATPX_DISPLAY_MUX_CONTROL_SUPPORTED (1 << 2)
296# define ATPX_I2C_MUX_CONTROL_SUPPORTED (1 << 3)
297# define ATPX_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION_SUPPORTED (1 << 4)
298# define ATPX_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION_SUPPORTED (1 << 5)
299# define ATPX_GET_DISPLAY_CONNECTORS_MAPPING_SUPPORTED (1 << 7)
300# define ATPX_GET_DISPLAY_DETECTION_PORTS_SUPPORTED (1 << 8)
301#define ATPX_FUNCTION_GET_PX_PARAMETERS 0x1
302/* ARG0: ATPX_FUNCTION_GET_PX_PARAMETERS
303 * ARG1: none
304 * OUTPUT:
305 * WORD - structure size in bytes (includes size field)
306 * DWORD - valid flags mask
307 * DWORD - flags
308 */
309/* flags */
310# define ATPX_LVDS_I2C_AVAILABLE_TO_BOTH_GPUS (1 << 0)
311# define ATPX_CRT1_I2C_AVAILABLE_TO_BOTH_GPUS (1 << 1)
312# define ATPX_DVI1_I2C_AVAILABLE_TO_BOTH_GPUS (1 << 2)
313# define ATPX_CRT1_RGB_SIGNAL_MUXED (1 << 3)
314# define ATPX_TV_SIGNAL_MUXED (1 << 4)
315# define ATPX_DFP_SIGNAL_MUXED (1 << 5)
316# define ATPX_SEPARATE_MUX_FOR_I2C (1 << 6)
317# define ATPX_DYNAMIC_PX_SUPPORTED (1 << 7)
318# define ATPX_ACF_NOT_SUPPORTED (1 << 8)
319# define ATPX_FIXED_NOT_SUPPORTED (1 << 9)
320# define ATPX_DYNAMIC_DGPU_POWER_OFF_SUPPORTED (1 << 10)
321# define ATPX_DGPU_REQ_POWER_FOR_DISPLAYS (1 << 11)
322# define ATPX_DGPU_CAN_DRIVE_DISPLAYS (1 << 12)
323# define ATPX_MS_HYBRID_GFX_SUPPORTED (1 << 14)
324#define ATPX_FUNCTION_POWER_CONTROL 0x2
325/* ARG0: ATPX_FUNCTION_POWER_CONTROL
326 * ARG1:
327 * WORD - structure size in bytes (includes size field)
328 * BYTE - dGPU power state (0: power off, 1: power on)
329 * OUTPUT: none
330 */
331#define ATPX_FUNCTION_DISPLAY_MUX_CONTROL 0x3
332/* ARG0: ATPX_FUNCTION_DISPLAY_MUX_CONTROL
333 * ARG1:
334 * WORD - structure size in bytes (includes size field)
335 * WORD - display mux control (0: iGPU, 1: dGPU)
336 * OUTPUT: none
337 */
338# define ATPX_INTEGRATED_GPU 0
339# define ATPX_DISCRETE_GPU 1
340#define ATPX_FUNCTION_I2C_MUX_CONTROL 0x4
341/* ARG0: ATPX_FUNCTION_I2C_MUX_CONTROL
342 * ARG1:
343 * WORD - structure size in bytes (includes size field)
344 * WORD - i2c/aux/hpd mux control (0: iGPU, 1: dGPU)
345 * OUTPUT: none
346 */
347#define ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION 0x5
348/* ARG0: ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION
349 * ARG1:
350 * WORD - structure size in bytes (includes size field)
351 * WORD - target gpu (0: iGPU, 1: dGPU)
352 * OUTPUT: none
353 */
354#define ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION 0x6
355/* ARG0: ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION
356 * ARG1:
357 * WORD - structure size in bytes (includes size field)
358 * WORD - target gpu (0: iGPU, 1: dGPU)
359 * OUTPUT: none
360 */
361#define ATPX_FUNCTION_GET_DISPLAY_CONNECTORS_MAPPING 0x8
362/* ARG0: ATPX_FUNCTION_GET_DISPLAY_CONNECTORS_MAPPING
363 * ARG1: none
364 * OUTPUT:
365 * WORD - number of display connectors
366 * WORD - connector structure size in bytes (excludes connector size field)
367 * BYTE - flags \
368 * BYTE - ATIF display vector bit position } repeated
369 * BYTE - adapter id (0: iGPU, 1-n: dGPU ordered by pcie bus number) } structure
370 * WORD - connector ACPI id /
371 */
372/* flags */
373# define ATPX_DISPLAY_OUTPUT_SUPPORTED_BY_ADAPTER_ID_DEVICE (1 << 0)
374# define ATPX_DISPLAY_HPD_SUPPORTED_BY_ADAPTER_ID_DEVICE (1 << 1)
375# define ATPX_DISPLAY_I2C_SUPPORTED_BY_ADAPTER_ID_DEVICE (1 << 2)
376#define ATPX_FUNCTION_GET_DISPLAY_DETECTION_PORTS 0x9
377/* ARG0: ATPX_FUNCTION_GET_DISPLAY_DETECTION_PORTS
378 * ARG1: none
379 * OUTPUT:
380 * WORD - number of HPD/DDC ports
381 * WORD - port structure size in bytes (excludes port size field)
382 * BYTE - ATIF display vector bit position \
383 * BYTE - hpd id } reapeated structure
384 * BYTE - ddc id /
385 *
386 * available on A+A systems only
387 */
388/* hpd id */
389# define ATPX_HPD_NONE 0
390# define ATPX_HPD1 1
391# define ATPX_HPD2 2
392# define ATPX_HPD3 3
393# define ATPX_HPD4 4
394# define ATPX_HPD5 5
395# define ATPX_HPD6 6
396/* ddc id */
397# define ATPX_DDC_NONE 0
398# define ATPX_DDC1 1
399# define ATPX_DDC2 2
400# define ATPX_DDC3 3
401# define ATPX_DDC4 4
402# define ATPX_DDC5 5
403# define ATPX_DDC6 6
404# define ATPX_DDC7 7
405# define ATPX_DDC8 8
406
407/* ATCS */
408#define ATCS_FUNCTION_VERIFY_INTERFACE 0x0
409/* ARG0: ATCS_FUNCTION_VERIFY_INTERFACE
410 * ARG1: none
411 * OUTPUT:
412 * WORD - structure size in bytes (includes size field)
413 * WORD - version
414 * DWORD - supported functions bit vector
415 */
416/* supported functions vector */
417# define ATCS_GET_EXTERNAL_STATE_SUPPORTED (1 << 0)
418# define ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED (1 << 1)
419# define ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED (1 << 2)
420# define ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED (1 << 3)
421#define ATCS_FUNCTION_GET_EXTERNAL_STATE 0x1
422/* ARG0: ATCS_FUNCTION_GET_EXTERNAL_STATE
423 * ARG1: none
424 * OUTPUT:
425 * WORD - structure size in bytes (includes size field)
426 * DWORD - valid flags mask
427 * DWORD - flags (0: undocked, 1: docked)
428 */
429/* flags */
430# define ATCS_DOCKED (1 << 0)
431#define ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST 0x2
432/* ARG0: ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST
433 * ARG1:
434 * WORD - structure size in bytes (includes size field)
435 * WORD - client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num)
436 * WORD - valid flags mask
437 * WORD - flags
438 * BYTE - request type
439 * BYTE - performance request
440 * OUTPUT:
441 * WORD - structure size in bytes (includes size field)
442 * BYTE - return value
443 */
444/* flags */
445# define ATCS_ADVERTISE_CAPS (1 << 0)
446# define ATCS_WAIT_FOR_COMPLETION (1 << 1)
447/* request type */
448# define ATCS_PCIE_LINK_SPEED 1
449/* performance request */
450# define ATCS_REMOVE 0
451# define ATCS_FORCE_LOW_POWER 1
452# define ATCS_PERF_LEVEL_1 2 /* PCIE Gen 1 */
453# define ATCS_PERF_LEVEL_2 3 /* PCIE Gen 2 */
454# define ATCS_PERF_LEVEL_3 4 /* PCIE Gen 3 */
455/* return value */
456# define ATCS_REQUEST_REFUSED 1
457# define ATCS_REQUEST_COMPLETE 2
458# define ATCS_REQUEST_IN_PROGRESS 3
459#define ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION 0x3
460/* ARG0: ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION
461 * ARG1: none
462 * OUTPUT: none
463 */
464#define ATCS_FUNCTION_SET_PCIE_BUS_WIDTH 0x4
465/* ARG0: ATCS_FUNCTION_SET_PCIE_BUS_WIDTH
466 * ARG1:
467 * WORD - structure size in bytes (includes size field)
468 * WORD - client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num)
469 * BYTE - number of active lanes
470 * OUTPUT:
471 * WORD - structure size in bytes (includes size field)
472 * BYTE - number of active lanes
473 */
474
475#endif
476