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1// SPDX-License-Identifier: MIT
2/*
3 * Copyright 2012 Advanced Micro Devices, Inc.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
22 *
23 */
24
25#include <linux/pci.h>
26#include <linux/acpi.h>
27#include <linux/backlight.h>
28#include <linux/slab.h>
29#include <linux/xarray.h>
30#include <linux/power_supply.h>
31#include <linux/pm_runtime.h>
32#include <linux/suspend.h>
33#include <acpi/video.h>
34#include <acpi/actbl.h>
35
36#include "amdgpu.h"
37#include "amdgpu_pm.h"
38#include "amdgpu_display.h"
39#include "amd_acpi.h"
40#include "atom.h"
41
42/* Declare GUID for AMD _DSM method for XCCs */
43static const guid_t amd_xcc_dsm_guid = GUID_INIT(0x8267f5d5, 0xa556, 0x44f2,
44 0xb8, 0xb4, 0x45, 0x56, 0x2e,
45 0x8c, 0x5b, 0xec);
46
47#define AMD_XCC_HID_START 3000
48#define AMD_XCC_DSM_GET_NUM_FUNCS 0
49#define AMD_XCC_DSM_GET_SUPP_MODE 1
50#define AMD_XCC_DSM_GET_XCP_MODE 2
51#define AMD_XCC_DSM_GET_VF_XCC_MAPPING 4
52#define AMD_XCC_DSM_GET_TMR_INFO 5
53#define AMD_XCC_DSM_NUM_FUNCS 5
54
55#define AMD_XCC_MAX_HID 24
56
57struct xarray numa_info_xa;
58
59/* Encapsulates the XCD acpi object information */
60struct amdgpu_acpi_xcc_info {
61 struct list_head list;
62 struct amdgpu_numa_info *numa_info;
63 uint8_t xcp_node;
64 uint8_t phy_id;
65 acpi_handle handle;
66};
67
68struct amdgpu_acpi_dev_info {
69 struct list_head list;
70 struct list_head xcc_list;
71 uint32_t sbdf;
72 uint16_t supp_xcp_mode;
73 uint16_t xcp_mode;
74 uint16_t mem_mode;
75 uint64_t tmr_base;
76 uint64_t tmr_size;
77};
78
79struct list_head amdgpu_acpi_dev_list;
80
81struct amdgpu_atif_notification_cfg {
82 bool enabled;
83 int command_code;
84};
85
86struct amdgpu_atif_notifications {
87 bool thermal_state;
88 bool forced_power_state;
89 bool system_power_state;
90 bool brightness_change;
91 bool dgpu_display_event;
92 bool gpu_package_power_limit;
93};
94
95struct amdgpu_atif_functions {
96 bool system_params;
97 bool sbios_requests;
98 bool temperature_change;
99 bool query_backlight_transfer_characteristics;
100 bool ready_to_undock;
101 bool external_gpu_information;
102};
103
104struct amdgpu_atif {
105 acpi_handle handle;
106
107 struct amdgpu_atif_notifications notifications;
108 struct amdgpu_atif_functions functions;
109 struct amdgpu_atif_notification_cfg notification_cfg;
110 struct backlight_device *bd;
111 struct amdgpu_dm_backlight_caps backlight_caps;
112};
113
114struct amdgpu_atcs_functions {
115 bool get_ext_state;
116 bool pcie_perf_req;
117 bool pcie_dev_rdy;
118 bool pcie_bus_width;
119 bool power_shift_control;
120};
121
122struct amdgpu_atcs {
123 acpi_handle handle;
124
125 struct amdgpu_atcs_functions functions;
126};
127
128static struct amdgpu_acpi_priv {
129 struct amdgpu_atif atif;
130 struct amdgpu_atcs atcs;
131} amdgpu_acpi_priv;
132
133/* Call the ATIF method
134 */
135/**
136 * amdgpu_atif_call - call an ATIF method
137 *
138 * @atif: atif structure
139 * @function: the ATIF function to execute
140 * @params: ATIF function params
141 *
142 * Executes the requested ATIF function (all asics).
143 * Returns a pointer to the acpi output buffer.
144 */
145static union acpi_object *amdgpu_atif_call(struct amdgpu_atif *atif,
146 int function,
147 struct acpi_buffer *params)
148{
149 acpi_status status;
150 union acpi_object atif_arg_elements[2];
151 struct acpi_object_list atif_arg;
152 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
153
154 atif_arg.count = 2;
155 atif_arg.pointer = &atif_arg_elements[0];
156
157 atif_arg_elements[0].type = ACPI_TYPE_INTEGER;
158 atif_arg_elements[0].integer.value = function;
159
160 if (params) {
161 atif_arg_elements[1].type = ACPI_TYPE_BUFFER;
162 atif_arg_elements[1].buffer.length = params->length;
163 atif_arg_elements[1].buffer.pointer = params->pointer;
164 } else {
165 /* We need a second fake parameter */
166 atif_arg_elements[1].type = ACPI_TYPE_INTEGER;
167 atif_arg_elements[1].integer.value = 0;
168 }
169
170 status = acpi_evaluate_object(atif->handle, NULL, &atif_arg,
171 &buffer);
172
173 /* Fail only if calling the method fails and ATIF is supported */
174 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
175 DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n",
176 acpi_format_exception(status));
177 kfree(buffer.pointer);
178 return NULL;
179 }
180
181 return buffer.pointer;
182}
183
184/**
185 * amdgpu_atif_parse_notification - parse supported notifications
186 *
187 * @n: supported notifications struct
188 * @mask: supported notifications mask from ATIF
189 *
190 * Use the supported notifications mask from ATIF function
191 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications
192 * are supported (all asics).
193 */
194static void amdgpu_atif_parse_notification(struct amdgpu_atif_notifications *n, u32 mask)
195{
196 n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED;
197 n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED;
198 n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED;
199 n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED;
200 n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED;
201 n->gpu_package_power_limit = mask & ATIF_GPU_PACKAGE_POWER_LIMIT_REQUEST_SUPPORTED;
202}
203
204/**
205 * amdgpu_atif_parse_functions - parse supported functions
206 *
207 * @f: supported functions struct
208 * @mask: supported functions mask from ATIF
209 *
210 * Use the supported functions mask from ATIF function
211 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions
212 * are supported (all asics).
213 */
214static void amdgpu_atif_parse_functions(struct amdgpu_atif_functions *f, u32 mask)
215{
216 f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED;
217 f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED;
218 f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED;
219 f->query_backlight_transfer_characteristics =
220 mask & ATIF_QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS_SUPPORTED;
221 f->ready_to_undock = mask & ATIF_READY_TO_UNDOCK_NOTIFICATION_SUPPORTED;
222 f->external_gpu_information = mask & ATIF_GET_EXTERNAL_GPU_INFORMATION_SUPPORTED;
223}
224
225/**
226 * amdgpu_atif_verify_interface - verify ATIF
227 *
228 * @atif: amdgpu atif struct
229 *
230 * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function
231 * to initialize ATIF and determine what features are supported
232 * (all asics).
233 * returns 0 on success, error on failure.
234 */
235static int amdgpu_atif_verify_interface(struct amdgpu_atif *atif)
236{
237 union acpi_object *info;
238 struct atif_verify_interface output;
239 size_t size;
240 int err = 0;
241
242 info = amdgpu_atif_call(atif, ATIF_FUNCTION_VERIFY_INTERFACE, NULL);
243 if (!info)
244 return -EIO;
245
246 memset(&output, 0, sizeof(output));
247
248 size = *(u16 *) info->buffer.pointer;
249 if (size < 12) {
250 DRM_INFO("ATIF buffer is too small: %zu\n", size);
251 err = -EINVAL;
252 goto out;
253 }
254 size = min(sizeof(output), size);
255
256 memcpy(&output, info->buffer.pointer, size);
257
258 /* TODO: check version? */
259 DRM_DEBUG_DRIVER("ATIF version %u\n", output.version);
260
261 amdgpu_atif_parse_notification(&atif->notifications, output.notification_mask);
262 amdgpu_atif_parse_functions(&atif->functions, output.function_bits);
263
264out:
265 kfree(info);
266 return err;
267}
268
269/**
270 * amdgpu_atif_get_notification_params - determine notify configuration
271 *
272 * @atif: acpi handle
273 *
274 * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function
275 * to determine if a notifier is used and if so which one
276 * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n)
277 * where n is specified in the result if a notifier is used.
278 * Returns 0 on success, error on failure.
279 */
280static int amdgpu_atif_get_notification_params(struct amdgpu_atif *atif)
281{
282 union acpi_object *info;
283 struct amdgpu_atif_notification_cfg *n = &atif->notification_cfg;
284 struct atif_system_params params;
285 size_t size;
286 int err = 0;
287
288 info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS,
289 NULL);
290 if (!info) {
291 err = -EIO;
292 goto out;
293 }
294
295 size = *(u16 *) info->buffer.pointer;
296 if (size < 10) {
297 err = -EINVAL;
298 goto out;
299 }
300
301 memset(¶ms, 0, sizeof(params));
302 size = min(sizeof(params), size);
303 memcpy(¶ms, info->buffer.pointer, size);
304
305 DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n",
306 params.flags, params.valid_mask);
307 params.flags = params.flags & params.valid_mask;
308
309 if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) {
310 n->enabled = false;
311 n->command_code = 0;
312 } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) {
313 n->enabled = true;
314 n->command_code = 0x81;
315 } else {
316 if (size < 11) {
317 err = -EINVAL;
318 goto out;
319 }
320 n->enabled = true;
321 n->command_code = params.command_code;
322 }
323
324out:
325 DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n",
326 (n->enabled ? "enabled" : "disabled"),
327 n->command_code);
328 kfree(info);
329 return err;
330}
331
332/**
333 * amdgpu_atif_query_backlight_caps - get min and max backlight input signal
334 *
335 * @atif: acpi handle
336 *
337 * Execute the QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS ATIF function
338 * to determine the acceptable range of backlight values
339 *
340 * Backlight_caps.caps_valid will be set to true if the query is successful
341 *
342 * The input signals are in range 0-255
343 *
344 * This function assumes the display with backlight is the first LCD
345 *
346 * Returns 0 on success, error on failure.
347 */
348static int amdgpu_atif_query_backlight_caps(struct amdgpu_atif *atif)
349{
350 union acpi_object *info;
351 struct atif_qbtc_output characteristics;
352 struct atif_qbtc_arguments arguments;
353 struct acpi_buffer params;
354 size_t size;
355 int err = 0;
356
357 arguments.size = sizeof(arguments);
358 arguments.requested_display = ATIF_QBTC_REQUEST_LCD1;
359
360 params.length = sizeof(arguments);
361 params.pointer = (void *)&arguments;
362
363 info = amdgpu_atif_call(atif,
364 ATIF_FUNCTION_QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS,
365 ¶ms);
366 if (!info) {
367 err = -EIO;
368 goto out;
369 }
370
371 size = *(u16 *) info->buffer.pointer;
372 if (size < 10) {
373 err = -EINVAL;
374 goto out;
375 }
376
377 memset(&characteristics, 0, sizeof(characteristics));
378 size = min(sizeof(characteristics), size);
379 memcpy(&characteristics, info->buffer.pointer, size);
380
381 atif->backlight_caps.caps_valid = true;
382 atif->backlight_caps.min_input_signal =
383 characteristics.min_input_signal;
384 atif->backlight_caps.max_input_signal =
385 characteristics.max_input_signal;
386out:
387 kfree(info);
388 return err;
389}
390
391/**
392 * amdgpu_atif_get_sbios_requests - get requested sbios event
393 *
394 * @atif: acpi handle
395 * @req: atif sbios request struct
396 *
397 * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function
398 * to determine what requests the sbios is making to the driver
399 * (all asics).
400 * Returns 0 on success, error on failure.
401 */
402static int amdgpu_atif_get_sbios_requests(struct amdgpu_atif *atif,
403 struct atif_sbios_requests *req)
404{
405 union acpi_object *info;
406 size_t size;
407 int count = 0;
408
409 info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS,
410 NULL);
411 if (!info)
412 return -EIO;
413
414 size = *(u16 *)info->buffer.pointer;
415 if (size < 0xd) {
416 count = -EINVAL;
417 goto out;
418 }
419 memset(req, 0, sizeof(*req));
420
421 size = min(sizeof(*req), size);
422 memcpy(req, info->buffer.pointer, size);
423 DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending);
424
425 count = hweight32(req->pending);
426
427out:
428 kfree(info);
429 return count;
430}
431
432/**
433 * amdgpu_atif_handler - handle ATIF notify requests
434 *
435 * @adev: amdgpu_device pointer
436 * @event: atif sbios request struct
437 *
438 * Checks the acpi event and if it matches an atif event,
439 * handles it.
440 *
441 * Returns:
442 * NOTIFY_BAD or NOTIFY_DONE, depending on the event.
443 */
444static int amdgpu_atif_handler(struct amdgpu_device *adev,
445 struct acpi_bus_event *event)
446{
447 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
448 int count;
449
450 DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n",
451 event->device_class, event->type);
452
453 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
454 return NOTIFY_DONE;
455
456 /* Is this actually our event? */
457 if (!atif->notification_cfg.enabled ||
458 event->type != atif->notification_cfg.command_code) {
459 /* These events will generate keypresses otherwise */
460 if (event->type == ACPI_VIDEO_NOTIFY_PROBE)
461 return NOTIFY_BAD;
462 else
463 return NOTIFY_DONE;
464 }
465
466 if (atif->functions.sbios_requests) {
467 struct atif_sbios_requests req;
468
469 /* Check pending SBIOS requests */
470 count = amdgpu_atif_get_sbios_requests(atif, &req);
471
472 if (count <= 0)
473 return NOTIFY_BAD;
474
475 DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count);
476
477 if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) {
478 if (atif->bd) {
479 DRM_DEBUG_DRIVER("Changing brightness to %d\n",
480 req.backlight_level);
481 /*
482 * XXX backlight_device_set_brightness() is
483 * hardwired to post BACKLIGHT_UPDATE_SYSFS.
484 * It probably should accept 'reason' parameter.
485 */
486 backlight_device_set_brightness(atif->bd, req.backlight_level);
487 }
488 }
489
490 if (req.pending & ATIF_DGPU_DISPLAY_EVENT) {
491 if (adev->flags & AMD_IS_PX) {
492 pm_runtime_get_sync(adev_to_drm(adev)->dev);
493 /* Just fire off a uevent and let userspace tell us what to do */
494 drm_helper_hpd_irq_event(adev_to_drm(adev));
495 pm_runtime_mark_last_busy(adev_to_drm(adev)->dev);
496 pm_runtime_put_autosuspend(adev_to_drm(adev)->dev);
497 }
498 }
499 /* TODO: check other events */
500 }
501
502 /* We've handled the event, stop the notifier chain. The ACPI interface
503 * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to
504 * userspace if the event was generated only to signal a SBIOS
505 * request.
506 */
507 return NOTIFY_BAD;
508}
509
510/* Call the ATCS method
511 */
512/**
513 * amdgpu_atcs_call - call an ATCS method
514 *
515 * @atcs: atcs structure
516 * @function: the ATCS function to execute
517 * @params: ATCS function params
518 *
519 * Executes the requested ATCS function (all asics).
520 * Returns a pointer to the acpi output buffer.
521 */
522static union acpi_object *amdgpu_atcs_call(struct amdgpu_atcs *atcs,
523 int function,
524 struct acpi_buffer *params)
525{
526 acpi_status status;
527 union acpi_object atcs_arg_elements[2];
528 struct acpi_object_list atcs_arg;
529 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
530
531 atcs_arg.count = 2;
532 atcs_arg.pointer = &atcs_arg_elements[0];
533
534 atcs_arg_elements[0].type = ACPI_TYPE_INTEGER;
535 atcs_arg_elements[0].integer.value = function;
536
537 if (params) {
538 atcs_arg_elements[1].type = ACPI_TYPE_BUFFER;
539 atcs_arg_elements[1].buffer.length = params->length;
540 atcs_arg_elements[1].buffer.pointer = params->pointer;
541 } else {
542 /* We need a second fake parameter */
543 atcs_arg_elements[1].type = ACPI_TYPE_INTEGER;
544 atcs_arg_elements[1].integer.value = 0;
545 }
546
547 status = acpi_evaluate_object(atcs->handle, NULL, &atcs_arg, &buffer);
548
549 /* Fail only if calling the method fails and ATIF is supported */
550 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
551 DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n",
552 acpi_format_exception(status));
553 kfree(buffer.pointer);
554 return NULL;
555 }
556
557 return buffer.pointer;
558}
559
560/**
561 * amdgpu_atcs_parse_functions - parse supported functions
562 *
563 * @f: supported functions struct
564 * @mask: supported functions mask from ATCS
565 *
566 * Use the supported functions mask from ATCS function
567 * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions
568 * are supported (all asics).
569 */
570static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mask)
571{
572 f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED;
573 f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED;
574 f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED;
575 f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED;
576 f->power_shift_control = mask & ATCS_SET_POWER_SHIFT_CONTROL_SUPPORTED;
577}
578
579/**
580 * amdgpu_atcs_verify_interface - verify ATCS
581 *
582 * @atcs: amdgpu atcs struct
583 *
584 * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function
585 * to initialize ATCS and determine what features are supported
586 * (all asics).
587 * returns 0 on success, error on failure.
588 */
589static int amdgpu_atcs_verify_interface(struct amdgpu_atcs *atcs)
590{
591 union acpi_object *info;
592 struct atcs_verify_interface output;
593 size_t size;
594 int err = 0;
595
596 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_VERIFY_INTERFACE, NULL);
597 if (!info)
598 return -EIO;
599
600 memset(&output, 0, sizeof(output));
601
602 size = *(u16 *) info->buffer.pointer;
603 if (size < 8) {
604 DRM_INFO("ATCS buffer is too small: %zu\n", size);
605 err = -EINVAL;
606 goto out;
607 }
608 size = min(sizeof(output), size);
609
610 memcpy(&output, info->buffer.pointer, size);
611
612 /* TODO: check version? */
613 DRM_DEBUG_DRIVER("ATCS version %u\n", output.version);
614
615 amdgpu_atcs_parse_functions(&atcs->functions, output.function_bits);
616
617out:
618 kfree(info);
619 return err;
620}
621
622/**
623 * amdgpu_acpi_is_pcie_performance_request_supported
624 *
625 * @adev: amdgpu_device pointer
626 *
627 * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods
628 * are supported (all asics).
629 * returns true if supported, false if not.
630 */
631bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *adev)
632{
633 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
634
635 if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy)
636 return true;
637
638 return false;
639}
640
641/**
642 * amdgpu_acpi_is_power_shift_control_supported
643 *
644 * Check if the ATCS power shift control method
645 * is supported.
646 * returns true if supported, false if not.
647 */
648bool amdgpu_acpi_is_power_shift_control_supported(void)
649{
650 return amdgpu_acpi_priv.atcs.functions.power_shift_control;
651}
652
653/**
654 * amdgpu_acpi_pcie_notify_device_ready
655 *
656 * @adev: amdgpu_device pointer
657 *
658 * Executes the PCIE_DEVICE_READY_NOTIFICATION method
659 * (all asics).
660 * returns 0 on success, error on failure.
661 */
662int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev)
663{
664 union acpi_object *info;
665 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
666
667 if (!atcs->functions.pcie_dev_rdy)
668 return -EINVAL;
669
670 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL);
671 if (!info)
672 return -EIO;
673
674 kfree(info);
675
676 return 0;
677}
678
679/**
680 * amdgpu_acpi_pcie_performance_request
681 *
682 * @adev: amdgpu_device pointer
683 * @perf_req: requested perf level (pcie gen speed)
684 * @advertise: set advertise caps flag if set
685 *
686 * Executes the PCIE_PERFORMANCE_REQUEST method to
687 * change the pcie gen speed (all asics).
688 * returns 0 on success, error on failure.
689 */
690int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev,
691 u8 perf_req, bool advertise)
692{
693 union acpi_object *info;
694 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
695 struct atcs_pref_req_input atcs_input;
696 struct atcs_pref_req_output atcs_output;
697 struct acpi_buffer params;
698 size_t size;
699 u32 retry = 3;
700
701 if (amdgpu_acpi_pcie_notify_device_ready(adev))
702 return -EINVAL;
703
704 if (!atcs->functions.pcie_perf_req)
705 return -EINVAL;
706
707 atcs_input.size = sizeof(struct atcs_pref_req_input);
708 /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
709 atcs_input.client_id = pci_dev_id(adev->pdev);
710 atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK;
711 atcs_input.flags = ATCS_WAIT_FOR_COMPLETION;
712 if (advertise)
713 atcs_input.flags |= ATCS_ADVERTISE_CAPS;
714 atcs_input.req_type = ATCS_PCIE_LINK_SPEED;
715 atcs_input.perf_req = perf_req;
716
717 params.length = sizeof(struct atcs_pref_req_input);
718 params.pointer = &atcs_input;
719
720 while (retry--) {
721 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, ¶ms);
722 if (!info)
723 return -EIO;
724
725 memset(&atcs_output, 0, sizeof(atcs_output));
726
727 size = *(u16 *) info->buffer.pointer;
728 if (size < 3) {
729 DRM_INFO("ATCS buffer is too small: %zu\n", size);
730 kfree(info);
731 return -EINVAL;
732 }
733 size = min(sizeof(atcs_output), size);
734
735 memcpy(&atcs_output, info->buffer.pointer, size);
736
737 kfree(info);
738
739 switch (atcs_output.ret_val) {
740 case ATCS_REQUEST_REFUSED:
741 default:
742 return -EINVAL;
743 case ATCS_REQUEST_COMPLETE:
744 return 0;
745 case ATCS_REQUEST_IN_PROGRESS:
746 udelay(10);
747 break;
748 }
749 }
750
751 return 0;
752}
753
754/**
755 * amdgpu_acpi_power_shift_control
756 *
757 * @adev: amdgpu_device pointer
758 * @dev_state: device acpi state
759 * @drv_state: driver state
760 *
761 * Executes the POWER_SHIFT_CONTROL method to
762 * communicate current dGPU device state and
763 * driver state to APU/SBIOS.
764 * returns 0 on success, error on failure.
765 */
766int amdgpu_acpi_power_shift_control(struct amdgpu_device *adev,
767 u8 dev_state, bool drv_state)
768{
769 union acpi_object *info;
770 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
771 struct atcs_pwr_shift_input atcs_input;
772 struct acpi_buffer params;
773
774 if (!amdgpu_acpi_is_power_shift_control_supported())
775 return -EINVAL;
776
777 atcs_input.size = sizeof(struct atcs_pwr_shift_input);
778 /* dGPU id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
779 atcs_input.dgpu_id = pci_dev_id(adev->pdev);
780 atcs_input.dev_acpi_state = dev_state;
781 atcs_input.drv_state = drv_state;
782
783 params.length = sizeof(struct atcs_pwr_shift_input);
784 params.pointer = &atcs_input;
785
786 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_POWER_SHIFT_CONTROL, ¶ms);
787 if (!info) {
788 DRM_ERROR("ATCS PSC update failed\n");
789 return -EIO;
790 }
791
792 return 0;
793}
794
795/**
796 * amdgpu_acpi_smart_shift_update - update dGPU device state to SBIOS
797 *
798 * @dev: drm_device pointer
799 * @ss_state: current smart shift event
800 *
801 * returns 0 on success,
802 * otherwise return error number.
803 */
804int amdgpu_acpi_smart_shift_update(struct drm_device *dev, enum amdgpu_ss ss_state)
805{
806 struct amdgpu_device *adev = drm_to_adev(dev);
807 int r;
808
809 if (!amdgpu_device_supports_smart_shift(dev))
810 return 0;
811
812 switch (ss_state) {
813 /* SBIOS trigger “stop”, “enable” and “start” at D0, Driver Operational.
814 * SBIOS trigger “stop” at D3, Driver Not Operational.
815 * SBIOS trigger “stop” and “disable” at D0, Driver NOT operational.
816 */
817 case AMDGPU_SS_DRV_LOAD:
818 r = amdgpu_acpi_power_shift_control(adev,
819 AMDGPU_ATCS_PSC_DEV_STATE_D0,
820 AMDGPU_ATCS_PSC_DRV_STATE_OPR);
821 break;
822 case AMDGPU_SS_DEV_D0:
823 r = amdgpu_acpi_power_shift_control(adev,
824 AMDGPU_ATCS_PSC_DEV_STATE_D0,
825 AMDGPU_ATCS_PSC_DRV_STATE_OPR);
826 break;
827 case AMDGPU_SS_DEV_D3:
828 r = amdgpu_acpi_power_shift_control(adev,
829 AMDGPU_ATCS_PSC_DEV_STATE_D3_HOT,
830 AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
831 break;
832 case AMDGPU_SS_DRV_UNLOAD:
833 r = amdgpu_acpi_power_shift_control(adev,
834 AMDGPU_ATCS_PSC_DEV_STATE_D0,
835 AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
836 break;
837 default:
838 return -EINVAL;
839 }
840
841 return r;
842}
843
844#ifdef CONFIG_ACPI_NUMA
845static inline uint64_t amdgpu_acpi_get_numa_size(int nid)
846{
847 /* This is directly using si_meminfo_node implementation as the
848 * function is not exported.
849 */
850 int zone_type;
851 uint64_t managed_pages = 0;
852
853 pg_data_t *pgdat = NODE_DATA(nid);
854
855 for (zone_type = 0; zone_type < MAX_NR_ZONES; zone_type++)
856 managed_pages +=
857 zone_managed_pages(&pgdat->node_zones[zone_type]);
858 return managed_pages * PAGE_SIZE;
859}
860
861static struct amdgpu_numa_info *amdgpu_acpi_get_numa_info(uint32_t pxm)
862{
863 struct amdgpu_numa_info *numa_info;
864 int nid;
865
866 numa_info = xa_load(&numa_info_xa, pxm);
867
868 if (!numa_info) {
869 struct sysinfo info;
870
871 numa_info = kzalloc(sizeof(*numa_info), GFP_KERNEL);
872 if (!numa_info)
873 return NULL;
874
875 nid = pxm_to_node(pxm);
876 numa_info->pxm = pxm;
877 numa_info->nid = nid;
878
879 if (numa_info->nid == NUMA_NO_NODE) {
880 si_meminfo(&info);
881 numa_info->size = info.totalram * info.mem_unit;
882 } else {
883 numa_info->size = amdgpu_acpi_get_numa_size(nid);
884 }
885 xa_store(&numa_info_xa, numa_info->pxm, numa_info, GFP_KERNEL);
886 }
887
888 return numa_info;
889}
890#endif
891
892/**
893 * amdgpu_acpi_get_node_id - obtain the NUMA node id for corresponding amdgpu
894 * acpi device handle
895 *
896 * @handle: acpi handle
897 * @numa_info: amdgpu_numa_info structure holding numa information
898 *
899 * Queries the ACPI interface to fetch the corresponding NUMA Node ID for a
900 * given amdgpu acpi device.
901 *
902 * Returns ACPI STATUS OK with Node ID on success or the corresponding failure reason
903 */
904static acpi_status amdgpu_acpi_get_node_id(acpi_handle handle,
905 struct amdgpu_numa_info **numa_info)
906{
907#ifdef CONFIG_ACPI_NUMA
908 u64 pxm;
909 acpi_status status;
910
911 if (!numa_info)
912 return_ACPI_STATUS(AE_ERROR);
913
914 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
915
916 if (ACPI_FAILURE(status))
917 return status;
918
919 *numa_info = amdgpu_acpi_get_numa_info(pxm);
920
921 if (!*numa_info)
922 return_ACPI_STATUS(AE_ERROR);
923
924 return_ACPI_STATUS(AE_OK);
925#else
926 return_ACPI_STATUS(AE_NOT_EXIST);
927#endif
928}
929
930static struct amdgpu_acpi_dev_info *amdgpu_acpi_get_dev(u32 sbdf)
931{
932 struct amdgpu_acpi_dev_info *acpi_dev;
933
934 if (list_empty(&amdgpu_acpi_dev_list))
935 return NULL;
936
937 list_for_each_entry(acpi_dev, &amdgpu_acpi_dev_list, list)
938 if (acpi_dev->sbdf == sbdf)
939 return acpi_dev;
940
941 return NULL;
942}
943
944static int amdgpu_acpi_dev_init(struct amdgpu_acpi_dev_info **dev_info,
945 struct amdgpu_acpi_xcc_info *xcc_info, u32 sbdf)
946{
947 struct amdgpu_acpi_dev_info *tmp;
948 union acpi_object *obj;
949 int ret = -ENOENT;
950
951 *dev_info = NULL;
952 tmp = kzalloc(sizeof(struct amdgpu_acpi_dev_info), GFP_KERNEL);
953 if (!tmp)
954 return -ENOMEM;
955
956 INIT_LIST_HEAD(&tmp->xcc_list);
957 INIT_LIST_HEAD(&tmp->list);
958 tmp->sbdf = sbdf;
959
960 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
961 AMD_XCC_DSM_GET_SUPP_MODE, NULL,
962 ACPI_TYPE_INTEGER);
963
964 if (!obj) {
965 acpi_handle_debug(xcc_info->handle,
966 "_DSM function %d evaluation failed",
967 AMD_XCC_DSM_GET_SUPP_MODE);
968 ret = -ENOENT;
969 goto out;
970 }
971
972 tmp->supp_xcp_mode = obj->integer.value & 0xFFFF;
973 ACPI_FREE(obj);
974
975 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
976 AMD_XCC_DSM_GET_XCP_MODE, NULL,
977 ACPI_TYPE_INTEGER);
978
979 if (!obj) {
980 acpi_handle_debug(xcc_info->handle,
981 "_DSM function %d evaluation failed",
982 AMD_XCC_DSM_GET_XCP_MODE);
983 ret = -ENOENT;
984 goto out;
985 }
986
987 tmp->xcp_mode = obj->integer.value & 0xFFFF;
988 tmp->mem_mode = (obj->integer.value >> 32) & 0xFFFF;
989 ACPI_FREE(obj);
990
991 /* Evaluate DSMs and fill XCC information */
992 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
993 AMD_XCC_DSM_GET_TMR_INFO, NULL,
994 ACPI_TYPE_PACKAGE);
995
996 if (!obj || obj->package.count < 2) {
997 acpi_handle_debug(xcc_info->handle,
998 "_DSM function %d evaluation failed",
999 AMD_XCC_DSM_GET_TMR_INFO);
1000 ret = -ENOENT;
1001 goto out;
1002 }
1003
1004 tmp->tmr_base = obj->package.elements[0].integer.value;
1005 tmp->tmr_size = obj->package.elements[1].integer.value;
1006 ACPI_FREE(obj);
1007
1008 DRM_DEBUG_DRIVER(
1009 "New dev(%x): Supported xcp mode: %x curr xcp_mode : %x mem mode : %x, tmr base: %llx tmr size: %llx ",
1010 tmp->sbdf, tmp->supp_xcp_mode, tmp->xcp_mode, tmp->mem_mode,
1011 tmp->tmr_base, tmp->tmr_size);
1012 list_add_tail(&tmp->list, &amdgpu_acpi_dev_list);
1013 *dev_info = tmp;
1014
1015 return 0;
1016
1017out:
1018 if (obj)
1019 ACPI_FREE(obj);
1020 kfree(tmp);
1021
1022 return ret;
1023}
1024
1025static int amdgpu_acpi_get_xcc_info(struct amdgpu_acpi_xcc_info *xcc_info,
1026 u32 *sbdf)
1027{
1028 union acpi_object *obj;
1029 acpi_status status;
1030 int ret = -ENOENT;
1031
1032 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
1033 AMD_XCC_DSM_GET_NUM_FUNCS, NULL,
1034 ACPI_TYPE_INTEGER);
1035
1036 if (!obj || obj->integer.value != AMD_XCC_DSM_NUM_FUNCS)
1037 goto out;
1038 ACPI_FREE(obj);
1039
1040 /* Evaluate DSMs and fill XCC information */
1041 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
1042 AMD_XCC_DSM_GET_VF_XCC_MAPPING, NULL,
1043 ACPI_TYPE_INTEGER);
1044
1045 if (!obj) {
1046 acpi_handle_debug(xcc_info->handle,
1047 "_DSM function %d evaluation failed",
1048 AMD_XCC_DSM_GET_VF_XCC_MAPPING);
1049 ret = -EINVAL;
1050 goto out;
1051 }
1052
1053 /* PF xcc id [39:32] */
1054 xcc_info->phy_id = (obj->integer.value >> 32) & 0xFF;
1055 /* xcp node of this xcc [47:40] */
1056 xcc_info->xcp_node = (obj->integer.value >> 40) & 0xFF;
1057 /* PF domain of this xcc [31:16] */
1058 *sbdf = (obj->integer.value) & 0xFFFF0000;
1059 /* PF bus/dev/fn of this xcc [63:48] */
1060 *sbdf |= (obj->integer.value >> 48) & 0xFFFF;
1061 ACPI_FREE(obj);
1062 obj = NULL;
1063
1064 status =
1065 amdgpu_acpi_get_node_id(xcc_info->handle, &xcc_info->numa_info);
1066
1067 /* TODO: check if this check is required */
1068 if (ACPI_SUCCESS(status))
1069 ret = 0;
1070out:
1071 if (obj)
1072 ACPI_FREE(obj);
1073
1074 return ret;
1075}
1076
1077static int amdgpu_acpi_enumerate_xcc(void)
1078{
1079 struct amdgpu_acpi_dev_info *dev_info = NULL;
1080 struct amdgpu_acpi_xcc_info *xcc_info;
1081 struct acpi_device *acpi_dev;
1082 char hid[ACPI_ID_LEN];
1083 int ret, id;
1084 u32 sbdf;
1085
1086 INIT_LIST_HEAD(&amdgpu_acpi_dev_list);
1087 xa_init(&numa_info_xa);
1088
1089 for (id = 0; id < AMD_XCC_MAX_HID; id++) {
1090 sprintf(hid, "%s%d", "AMD", AMD_XCC_HID_START + id);
1091 acpi_dev = acpi_dev_get_first_match_dev(hid, NULL, -1);
1092 /* These ACPI objects are expected to be in sequential order. If
1093 * one is not found, no need to check the rest.
1094 */
1095 if (!acpi_dev) {
1096 DRM_DEBUG_DRIVER("No matching acpi device found for %s",
1097 hid);
1098 break;
1099 }
1100
1101 xcc_info = kzalloc(sizeof(struct amdgpu_acpi_xcc_info),
1102 GFP_KERNEL);
1103 if (!xcc_info) {
1104 DRM_ERROR("Failed to allocate memory for xcc info\n");
1105 return -ENOMEM;
1106 }
1107
1108 INIT_LIST_HEAD(&xcc_info->list);
1109 xcc_info->handle = acpi_device_handle(acpi_dev);
1110 acpi_dev_put(acpi_dev);
1111
1112 ret = amdgpu_acpi_get_xcc_info(xcc_info, &sbdf);
1113 if (ret) {
1114 kfree(xcc_info);
1115 continue;
1116 }
1117
1118 dev_info = amdgpu_acpi_get_dev(sbdf);
1119
1120 if (!dev_info)
1121 ret = amdgpu_acpi_dev_init(&dev_info, xcc_info, sbdf);
1122
1123 if (ret == -ENOMEM)
1124 return ret;
1125
1126 if (!dev_info) {
1127 kfree(xcc_info);
1128 continue;
1129 }
1130
1131 list_add_tail(&xcc_info->list, &dev_info->xcc_list);
1132 }
1133
1134 return 0;
1135}
1136
1137int amdgpu_acpi_get_tmr_info(struct amdgpu_device *adev, u64 *tmr_offset,
1138 u64 *tmr_size)
1139{
1140 struct amdgpu_acpi_dev_info *dev_info;
1141 u32 sbdf;
1142
1143 if (!tmr_offset || !tmr_size)
1144 return -EINVAL;
1145
1146 sbdf = (pci_domain_nr(adev->pdev->bus) << 16);
1147 sbdf |= pci_dev_id(adev->pdev);
1148 dev_info = amdgpu_acpi_get_dev(sbdf);
1149 if (!dev_info)
1150 return -ENOENT;
1151
1152 *tmr_offset = dev_info->tmr_base;
1153 *tmr_size = dev_info->tmr_size;
1154
1155 return 0;
1156}
1157
1158int amdgpu_acpi_get_mem_info(struct amdgpu_device *adev, int xcc_id,
1159 struct amdgpu_numa_info *numa_info)
1160{
1161 struct amdgpu_acpi_dev_info *dev_info;
1162 struct amdgpu_acpi_xcc_info *xcc_info;
1163 u32 sbdf;
1164
1165 if (!numa_info)
1166 return -EINVAL;
1167
1168 sbdf = (pci_domain_nr(adev->pdev->bus) << 16);
1169 sbdf |= pci_dev_id(adev->pdev);
1170 dev_info = amdgpu_acpi_get_dev(sbdf);
1171 if (!dev_info)
1172 return -ENOENT;
1173
1174 list_for_each_entry(xcc_info, &dev_info->xcc_list, list) {
1175 if (xcc_info->phy_id == xcc_id) {
1176 memcpy(numa_info, xcc_info->numa_info,
1177 sizeof(*numa_info));
1178 return 0;
1179 }
1180 }
1181
1182 return -ENOENT;
1183}
1184
1185/**
1186 * amdgpu_acpi_event - handle notify events
1187 *
1188 * @nb: notifier block
1189 * @val: val
1190 * @data: acpi event
1191 *
1192 * Calls relevant amdgpu functions in response to various
1193 * acpi events.
1194 * Returns NOTIFY code
1195 */
1196static int amdgpu_acpi_event(struct notifier_block *nb,
1197 unsigned long val,
1198 void *data)
1199{
1200 struct amdgpu_device *adev = container_of(nb, struct amdgpu_device, acpi_nb);
1201 struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
1202
1203 if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
1204 if (power_supply_is_system_supplied() > 0)
1205 DRM_DEBUG_DRIVER("pm: AC\n");
1206 else
1207 DRM_DEBUG_DRIVER("pm: DC\n");
1208
1209 amdgpu_pm_acpi_event_handler(adev);
1210 }
1211
1212 /* Check for pending SBIOS requests */
1213 return amdgpu_atif_handler(adev, entry);
1214}
1215
1216/* Call all ACPI methods here */
1217/**
1218 * amdgpu_acpi_init - init driver acpi support
1219 *
1220 * @adev: amdgpu_device pointer
1221 *
1222 * Verifies the AMD ACPI interfaces and registers with the acpi
1223 * notifier chain (all asics).
1224 * Returns 0 on success, error on failure.
1225 */
1226int amdgpu_acpi_init(struct amdgpu_device *adev)
1227{
1228 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1229
1230 if (atif->notifications.brightness_change) {
1231 if (adev->dc_enabled) {
1232#if defined(CONFIG_DRM_AMD_DC)
1233 struct amdgpu_display_manager *dm = &adev->dm;
1234
1235 if (dm->backlight_dev[0])
1236 atif->bd = dm->backlight_dev[0];
1237#endif
1238 } else {
1239 struct drm_encoder *tmp;
1240
1241 /* Find the encoder controlling the brightness */
1242 list_for_each_entry(tmp, &adev_to_drm(adev)->mode_config.encoder_list,
1243 head) {
1244 struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp);
1245
1246 if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
1247 enc->enc_priv) {
1248 struct amdgpu_encoder_atom_dig *dig = enc->enc_priv;
1249
1250 if (dig->bl_dev) {
1251 atif->bd = dig->bl_dev;
1252 break;
1253 }
1254 }
1255 }
1256 }
1257 }
1258 adev->acpi_nb.notifier_call = amdgpu_acpi_event;
1259 register_acpi_notifier(&adev->acpi_nb);
1260
1261 return 0;
1262}
1263
1264void amdgpu_acpi_get_backlight_caps(struct amdgpu_dm_backlight_caps *caps)
1265{
1266 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1267
1268 caps->caps_valid = atif->backlight_caps.caps_valid;
1269 caps->min_input_signal = atif->backlight_caps.min_input_signal;
1270 caps->max_input_signal = atif->backlight_caps.max_input_signal;
1271}
1272
1273/**
1274 * amdgpu_acpi_fini - tear down driver acpi support
1275 *
1276 * @adev: amdgpu_device pointer
1277 *
1278 * Unregisters with the acpi notifier chain (all asics).
1279 */
1280void amdgpu_acpi_fini(struct amdgpu_device *adev)
1281{
1282 unregister_acpi_notifier(&adev->acpi_nb);
1283}
1284
1285/**
1286 * amdgpu_atif_pci_probe_handle - look up the ATIF handle
1287 *
1288 * @pdev: pci device
1289 *
1290 * Look up the ATIF handles (all asics).
1291 * Returns true if the handle is found, false if not.
1292 */
1293static bool amdgpu_atif_pci_probe_handle(struct pci_dev *pdev)
1294{
1295 char acpi_method_name[255] = { 0 };
1296 struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
1297 acpi_handle dhandle, atif_handle;
1298 acpi_status status;
1299 int ret;
1300
1301 dhandle = ACPI_HANDLE(&pdev->dev);
1302 if (!dhandle)
1303 return false;
1304
1305 status = acpi_get_handle(dhandle, "ATIF", &atif_handle);
1306 if (ACPI_FAILURE(status))
1307 return false;
1308
1309 amdgpu_acpi_priv.atif.handle = atif_handle;
1310 acpi_get_name(amdgpu_acpi_priv.atif.handle, ACPI_FULL_PATHNAME, &buffer);
1311 DRM_DEBUG_DRIVER("Found ATIF handle %s\n", acpi_method_name);
1312 ret = amdgpu_atif_verify_interface(&amdgpu_acpi_priv.atif);
1313 if (ret) {
1314 amdgpu_acpi_priv.atif.handle = 0;
1315 return false;
1316 }
1317 return true;
1318}
1319
1320/**
1321 * amdgpu_atcs_pci_probe_handle - look up the ATCS handle
1322 *
1323 * @pdev: pci device
1324 *
1325 * Look up the ATCS handles (all asics).
1326 * Returns true if the handle is found, false if not.
1327 */
1328static bool amdgpu_atcs_pci_probe_handle(struct pci_dev *pdev)
1329{
1330 char acpi_method_name[255] = { 0 };
1331 struct acpi_buffer buffer = { sizeof(acpi_method_name), acpi_method_name };
1332 acpi_handle dhandle, atcs_handle;
1333 acpi_status status;
1334 int ret;
1335
1336 dhandle = ACPI_HANDLE(&pdev->dev);
1337 if (!dhandle)
1338 return false;
1339
1340 status = acpi_get_handle(dhandle, "ATCS", &atcs_handle);
1341 if (ACPI_FAILURE(status))
1342 return false;
1343
1344 amdgpu_acpi_priv.atcs.handle = atcs_handle;
1345 acpi_get_name(amdgpu_acpi_priv.atcs.handle, ACPI_FULL_PATHNAME, &buffer);
1346 DRM_DEBUG_DRIVER("Found ATCS handle %s\n", acpi_method_name);
1347 ret = amdgpu_atcs_verify_interface(&amdgpu_acpi_priv.atcs);
1348 if (ret) {
1349 amdgpu_acpi_priv.atcs.handle = 0;
1350 return false;
1351 }
1352 return true;
1353}
1354
1355
1356/**
1357 * amdgpu_acpi_should_gpu_reset
1358 *
1359 * @adev: amdgpu_device_pointer
1360 *
1361 * returns true if should reset GPU, false if not
1362 */
1363bool amdgpu_acpi_should_gpu_reset(struct amdgpu_device *adev)
1364{
1365 if ((adev->flags & AMD_IS_APU) &&
1366 adev->gfx.imu.funcs) /* Not need to do mode2 reset for IMU enabled APUs */
1367 return false;
1368
1369 if ((adev->flags & AMD_IS_APU) &&
1370 amdgpu_acpi_is_s3_active(adev))
1371 return false;
1372
1373 if (amdgpu_sriov_vf(adev))
1374 return false;
1375
1376#if IS_ENABLED(CONFIG_SUSPEND)
1377 return pm_suspend_target_state != PM_SUSPEND_TO_IDLE;
1378#else
1379 return true;
1380#endif
1381}
1382
1383/*
1384 * amdgpu_acpi_detect - detect ACPI ATIF/ATCS methods
1385 *
1386 * Check if we have the ATIF/ATCS methods and populate
1387 * the structures in the driver.
1388 */
1389void amdgpu_acpi_detect(void)
1390{
1391 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1392 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
1393 struct pci_dev *pdev = NULL;
1394 int ret;
1395
1396 while ((pdev = pci_get_base_class(PCI_BASE_CLASS_DISPLAY, pdev))) {
1397 if ((pdev->class != PCI_CLASS_DISPLAY_VGA << 8) &&
1398 (pdev->class != PCI_CLASS_DISPLAY_OTHER << 8))
1399 continue;
1400
1401 if (!atif->handle)
1402 amdgpu_atif_pci_probe_handle(pdev);
1403 if (!atcs->handle)
1404 amdgpu_atcs_pci_probe_handle(pdev);
1405 }
1406
1407 if (atif->functions.sbios_requests && !atif->functions.system_params) {
1408 /* XXX check this workraround, if sbios request function is
1409 * present we have to see how it's configured in the system
1410 * params
1411 */
1412 atif->functions.system_params = true;
1413 }
1414
1415 if (atif->functions.system_params) {
1416 ret = amdgpu_atif_get_notification_params(atif);
1417 if (ret) {
1418 DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n",
1419 ret);
1420 /* Disable notification */
1421 atif->notification_cfg.enabled = false;
1422 }
1423 }
1424
1425 if (atif->functions.query_backlight_transfer_characteristics) {
1426 ret = amdgpu_atif_query_backlight_caps(atif);
1427 if (ret) {
1428 DRM_DEBUG_DRIVER("Call to QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS failed: %d\n",
1429 ret);
1430 atif->backlight_caps.caps_valid = false;
1431 }
1432 } else {
1433 atif->backlight_caps.caps_valid = false;
1434 }
1435
1436 amdgpu_acpi_enumerate_xcc();
1437}
1438
1439void amdgpu_acpi_release(void)
1440{
1441 struct amdgpu_acpi_dev_info *dev_info, *dev_tmp;
1442 struct amdgpu_acpi_xcc_info *xcc_info, *xcc_tmp;
1443 struct amdgpu_numa_info *numa_info;
1444 unsigned long index;
1445
1446 xa_for_each(&numa_info_xa, index, numa_info) {
1447 kfree(numa_info);
1448 xa_erase(&numa_info_xa, index);
1449 }
1450
1451 if (list_empty(&amdgpu_acpi_dev_list))
1452 return;
1453
1454 list_for_each_entry_safe(dev_info, dev_tmp, &amdgpu_acpi_dev_list,
1455 list) {
1456 list_for_each_entry_safe(xcc_info, xcc_tmp, &dev_info->xcc_list,
1457 list) {
1458 list_del(&xcc_info->list);
1459 kfree(xcc_info);
1460 }
1461
1462 list_del(&dev_info->list);
1463 kfree(dev_info);
1464 }
1465}
1466
1467#if IS_ENABLED(CONFIG_SUSPEND)
1468/**
1469 * amdgpu_acpi_is_s3_active
1470 *
1471 * @adev: amdgpu_device_pointer
1472 *
1473 * returns true if supported, false if not.
1474 */
1475bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev)
1476{
1477 return !(adev->flags & AMD_IS_APU) ||
1478 (pm_suspend_target_state == PM_SUSPEND_MEM);
1479}
1480
1481/**
1482 * amdgpu_acpi_is_s0ix_active
1483 *
1484 * @adev: amdgpu_device_pointer
1485 *
1486 * returns true if supported, false if not.
1487 */
1488bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev)
1489{
1490 if (!(adev->flags & AMD_IS_APU) ||
1491 (pm_suspend_target_state != PM_SUSPEND_TO_IDLE))
1492 return false;
1493
1494 if (adev->asic_type < CHIP_RAVEN)
1495 return false;
1496
1497 if (!(adev->pm.pp_feature & PP_GFXOFF_MASK))
1498 return false;
1499
1500 /*
1501 * If ACPI_FADT_LOW_POWER_S0 is not set in the FADT, it is generally
1502 * risky to do any special firmware-related preparations for entering
1503 * S0ix even though the system is suspending to idle, so return false
1504 * in that case.
1505 */
1506 if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) {
1507 dev_err_once(adev->dev,
1508 "Power consumption will be higher as BIOS has not been configured for suspend-to-idle.\n"
1509 "To use suspend-to-idle change the sleep mode in BIOS setup.\n");
1510 return false;
1511 }
1512
1513#if !IS_ENABLED(CONFIG_AMD_PMC)
1514 dev_err_once(adev->dev,
1515 "Power consumption will be higher as the kernel has not been compiled with CONFIG_AMD_PMC.\n");
1516 return false;
1517#else
1518 return true;
1519#endif /* CONFIG_AMD_PMC */
1520}
1521
1522/**
1523 * amdgpu_choose_low_power_state
1524 *
1525 * @adev: amdgpu_device_pointer
1526 *
1527 * Choose the target low power state for the GPU
1528 */
1529void amdgpu_choose_low_power_state(struct amdgpu_device *adev)
1530{
1531 if (adev->in_runpm)
1532 return;
1533
1534 if (amdgpu_acpi_is_s0ix_active(adev))
1535 adev->in_s0ix = true;
1536 else if (amdgpu_acpi_is_s3_active(adev))
1537 adev->in_s3 = true;
1538}
1539
1540#endif /* CONFIG_SUSPEND */
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#include <linux/pci.h>
25#include <linux/acpi.h>
26#include <linux/slab.h>
27#include <linux/power_supply.h>
28#include <linux/pm_runtime.h>
29#include <linux/suspend.h>
30#include <acpi/video.h>
31#include <acpi/actbl.h>
32
33#include <drm/drm_crtc_helper.h>
34#include "amdgpu.h"
35#include "amdgpu_pm.h"
36#include "amdgpu_display.h"
37#include "amd_acpi.h"
38#include "atom.h"
39
40struct amdgpu_atif_notification_cfg {
41 bool enabled;
42 int command_code;
43};
44
45struct amdgpu_atif_notifications {
46 bool thermal_state;
47 bool forced_power_state;
48 bool system_power_state;
49 bool brightness_change;
50 bool dgpu_display_event;
51 bool gpu_package_power_limit;
52};
53
54struct amdgpu_atif_functions {
55 bool system_params;
56 bool sbios_requests;
57 bool temperature_change;
58 bool query_backlight_transfer_characteristics;
59 bool ready_to_undock;
60 bool external_gpu_information;
61};
62
63struct amdgpu_atif {
64 acpi_handle handle;
65
66 struct amdgpu_atif_notifications notifications;
67 struct amdgpu_atif_functions functions;
68 struct amdgpu_atif_notification_cfg notification_cfg;
69#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
70 struct backlight_device *bd;
71#endif
72 struct amdgpu_dm_backlight_caps backlight_caps;
73};
74
75struct amdgpu_atcs_functions {
76 bool get_ext_state;
77 bool pcie_perf_req;
78 bool pcie_dev_rdy;
79 bool pcie_bus_width;
80 bool power_shift_control;
81};
82
83struct amdgpu_atcs {
84 acpi_handle handle;
85
86 struct amdgpu_atcs_functions functions;
87};
88
89static struct amdgpu_acpi_priv {
90 struct amdgpu_atif atif;
91 struct amdgpu_atcs atcs;
92} amdgpu_acpi_priv;
93
94/* Call the ATIF method
95 */
96/**
97 * amdgpu_atif_call - call an ATIF method
98 *
99 * @atif: atif structure
100 * @function: the ATIF function to execute
101 * @params: ATIF function params
102 *
103 * Executes the requested ATIF function (all asics).
104 * Returns a pointer to the acpi output buffer.
105 */
106static union acpi_object *amdgpu_atif_call(struct amdgpu_atif *atif,
107 int function,
108 struct acpi_buffer *params)
109{
110 acpi_status status;
111 union acpi_object atif_arg_elements[2];
112 struct acpi_object_list atif_arg;
113 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
114
115 atif_arg.count = 2;
116 atif_arg.pointer = &atif_arg_elements[0];
117
118 atif_arg_elements[0].type = ACPI_TYPE_INTEGER;
119 atif_arg_elements[0].integer.value = function;
120
121 if (params) {
122 atif_arg_elements[1].type = ACPI_TYPE_BUFFER;
123 atif_arg_elements[1].buffer.length = params->length;
124 atif_arg_elements[1].buffer.pointer = params->pointer;
125 } else {
126 /* We need a second fake parameter */
127 atif_arg_elements[1].type = ACPI_TYPE_INTEGER;
128 atif_arg_elements[1].integer.value = 0;
129 }
130
131 status = acpi_evaluate_object(atif->handle, NULL, &atif_arg,
132 &buffer);
133
134 /* Fail only if calling the method fails and ATIF is supported */
135 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
136 DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n",
137 acpi_format_exception(status));
138 kfree(buffer.pointer);
139 return NULL;
140 }
141
142 return buffer.pointer;
143}
144
145/**
146 * amdgpu_atif_parse_notification - parse supported notifications
147 *
148 * @n: supported notifications struct
149 * @mask: supported notifications mask from ATIF
150 *
151 * Use the supported notifications mask from ATIF function
152 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications
153 * are supported (all asics).
154 */
155static void amdgpu_atif_parse_notification(struct amdgpu_atif_notifications *n, u32 mask)
156{
157 n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED;
158 n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED;
159 n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED;
160 n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED;
161 n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED;
162 n->gpu_package_power_limit = mask & ATIF_GPU_PACKAGE_POWER_LIMIT_REQUEST_SUPPORTED;
163}
164
165/**
166 * amdgpu_atif_parse_functions - parse supported functions
167 *
168 * @f: supported functions struct
169 * @mask: supported functions mask from ATIF
170 *
171 * Use the supported functions mask from ATIF function
172 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions
173 * are supported (all asics).
174 */
175static void amdgpu_atif_parse_functions(struct amdgpu_atif_functions *f, u32 mask)
176{
177 f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED;
178 f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED;
179 f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED;
180 f->query_backlight_transfer_characteristics =
181 mask & ATIF_QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS_SUPPORTED;
182 f->ready_to_undock = mask & ATIF_READY_TO_UNDOCK_NOTIFICATION_SUPPORTED;
183 f->external_gpu_information = mask & ATIF_GET_EXTERNAL_GPU_INFORMATION_SUPPORTED;
184}
185
186/**
187 * amdgpu_atif_verify_interface - verify ATIF
188 *
189 * @atif: amdgpu atif struct
190 *
191 * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function
192 * to initialize ATIF and determine what features are supported
193 * (all asics).
194 * returns 0 on success, error on failure.
195 */
196static int amdgpu_atif_verify_interface(struct amdgpu_atif *atif)
197{
198 union acpi_object *info;
199 struct atif_verify_interface output;
200 size_t size;
201 int err = 0;
202
203 info = amdgpu_atif_call(atif, ATIF_FUNCTION_VERIFY_INTERFACE, NULL);
204 if (!info)
205 return -EIO;
206
207 memset(&output, 0, sizeof(output));
208
209 size = *(u16 *) info->buffer.pointer;
210 if (size < 12) {
211 DRM_INFO("ATIF buffer is too small: %zu\n", size);
212 err = -EINVAL;
213 goto out;
214 }
215 size = min(sizeof(output), size);
216
217 memcpy(&output, info->buffer.pointer, size);
218
219 /* TODO: check version? */
220 DRM_DEBUG_DRIVER("ATIF version %u\n", output.version);
221
222 amdgpu_atif_parse_notification(&atif->notifications, output.notification_mask);
223 amdgpu_atif_parse_functions(&atif->functions, output.function_bits);
224
225out:
226 kfree(info);
227 return err;
228}
229
230/**
231 * amdgpu_atif_get_notification_params - determine notify configuration
232 *
233 * @atif: acpi handle
234 *
235 * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function
236 * to determine if a notifier is used and if so which one
237 * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n)
238 * where n is specified in the result if a notifier is used.
239 * Returns 0 on success, error on failure.
240 */
241static int amdgpu_atif_get_notification_params(struct amdgpu_atif *atif)
242{
243 union acpi_object *info;
244 struct amdgpu_atif_notification_cfg *n = &atif->notification_cfg;
245 struct atif_system_params params;
246 size_t size;
247 int err = 0;
248
249 info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS,
250 NULL);
251 if (!info) {
252 err = -EIO;
253 goto out;
254 }
255
256 size = *(u16 *) info->buffer.pointer;
257 if (size < 10) {
258 err = -EINVAL;
259 goto out;
260 }
261
262 memset(¶ms, 0, sizeof(params));
263 size = min(sizeof(params), size);
264 memcpy(¶ms, info->buffer.pointer, size);
265
266 DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n",
267 params.flags, params.valid_mask);
268 params.flags = params.flags & params.valid_mask;
269
270 if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) {
271 n->enabled = false;
272 n->command_code = 0;
273 } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) {
274 n->enabled = true;
275 n->command_code = 0x81;
276 } else {
277 if (size < 11) {
278 err = -EINVAL;
279 goto out;
280 }
281 n->enabled = true;
282 n->command_code = params.command_code;
283 }
284
285out:
286 DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n",
287 (n->enabled ? "enabled" : "disabled"),
288 n->command_code);
289 kfree(info);
290 return err;
291}
292
293/**
294 * amdgpu_atif_query_backlight_caps - get min and max backlight input signal
295 *
296 * @atif: acpi handle
297 *
298 * Execute the QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS ATIF function
299 * to determine the acceptable range of backlight values
300 *
301 * Backlight_caps.caps_valid will be set to true if the query is successful
302 *
303 * The input signals are in range 0-255
304 *
305 * This function assumes the display with backlight is the first LCD
306 *
307 * Returns 0 on success, error on failure.
308 */
309static int amdgpu_atif_query_backlight_caps(struct amdgpu_atif *atif)
310{
311 union acpi_object *info;
312 struct atif_qbtc_output characteristics;
313 struct atif_qbtc_arguments arguments;
314 struct acpi_buffer params;
315 size_t size;
316 int err = 0;
317
318 arguments.size = sizeof(arguments);
319 arguments.requested_display = ATIF_QBTC_REQUEST_LCD1;
320
321 params.length = sizeof(arguments);
322 params.pointer = (void *)&arguments;
323
324 info = amdgpu_atif_call(atif,
325 ATIF_FUNCTION_QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS,
326 ¶ms);
327 if (!info) {
328 err = -EIO;
329 goto out;
330 }
331
332 size = *(u16 *) info->buffer.pointer;
333 if (size < 10) {
334 err = -EINVAL;
335 goto out;
336 }
337
338 memset(&characteristics, 0, sizeof(characteristics));
339 size = min(sizeof(characteristics), size);
340 memcpy(&characteristics, info->buffer.pointer, size);
341
342 atif->backlight_caps.caps_valid = true;
343 atif->backlight_caps.min_input_signal =
344 characteristics.min_input_signal;
345 atif->backlight_caps.max_input_signal =
346 characteristics.max_input_signal;
347out:
348 kfree(info);
349 return err;
350}
351
352/**
353 * amdgpu_atif_get_sbios_requests - get requested sbios event
354 *
355 * @atif: acpi handle
356 * @req: atif sbios request struct
357 *
358 * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function
359 * to determine what requests the sbios is making to the driver
360 * (all asics).
361 * Returns 0 on success, error on failure.
362 */
363static int amdgpu_atif_get_sbios_requests(struct amdgpu_atif *atif,
364 struct atif_sbios_requests *req)
365{
366 union acpi_object *info;
367 size_t size;
368 int count = 0;
369
370 info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS,
371 NULL);
372 if (!info)
373 return -EIO;
374
375 size = *(u16 *)info->buffer.pointer;
376 if (size < 0xd) {
377 count = -EINVAL;
378 goto out;
379 }
380 memset(req, 0, sizeof(*req));
381
382 size = min(sizeof(*req), size);
383 memcpy(req, info->buffer.pointer, size);
384 DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending);
385
386 count = hweight32(req->pending);
387
388out:
389 kfree(info);
390 return count;
391}
392
393/**
394 * amdgpu_atif_handler - handle ATIF notify requests
395 *
396 * @adev: amdgpu_device pointer
397 * @event: atif sbios request struct
398 *
399 * Checks the acpi event and if it matches an atif event,
400 * handles it.
401 *
402 * Returns:
403 * NOTIFY_BAD or NOTIFY_DONE, depending on the event.
404 */
405static int amdgpu_atif_handler(struct amdgpu_device *adev,
406 struct acpi_bus_event *event)
407{
408 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
409 int count;
410
411 DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n",
412 event->device_class, event->type);
413
414 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
415 return NOTIFY_DONE;
416
417 /* Is this actually our event? */
418 if (!atif->notification_cfg.enabled ||
419 event->type != atif->notification_cfg.command_code) {
420 /* These events will generate keypresses otherwise */
421 if (event->type == ACPI_VIDEO_NOTIFY_PROBE)
422 return NOTIFY_BAD;
423 else
424 return NOTIFY_DONE;
425 }
426
427 if (atif->functions.sbios_requests) {
428 struct atif_sbios_requests req;
429
430 /* Check pending SBIOS requests */
431 count = amdgpu_atif_get_sbios_requests(atif, &req);
432
433 if (count <= 0)
434 return NOTIFY_BAD;
435
436 DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count);
437
438 if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) {
439#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
440 if (atif->bd) {
441 DRM_DEBUG_DRIVER("Changing brightness to %d\n",
442 req.backlight_level);
443 /*
444 * XXX backlight_device_set_brightness() is
445 * hardwired to post BACKLIGHT_UPDATE_SYSFS.
446 * It probably should accept 'reason' parameter.
447 */
448 backlight_device_set_brightness(atif->bd, req.backlight_level);
449 }
450#endif
451 }
452
453 if (req.pending & ATIF_DGPU_DISPLAY_EVENT) {
454 if (adev->flags & AMD_IS_PX) {
455 pm_runtime_get_sync(adev_to_drm(adev)->dev);
456 /* Just fire off a uevent and let userspace tell us what to do */
457 drm_helper_hpd_irq_event(adev_to_drm(adev));
458 pm_runtime_mark_last_busy(adev_to_drm(adev)->dev);
459 pm_runtime_put_autosuspend(adev_to_drm(adev)->dev);
460 }
461 }
462 /* TODO: check other events */
463 }
464
465 /* We've handled the event, stop the notifier chain. The ACPI interface
466 * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to
467 * userspace if the event was generated only to signal a SBIOS
468 * request.
469 */
470 return NOTIFY_BAD;
471}
472
473/* Call the ATCS method
474 */
475/**
476 * amdgpu_atcs_call - call an ATCS method
477 *
478 * @atcs: atcs structure
479 * @function: the ATCS function to execute
480 * @params: ATCS function params
481 *
482 * Executes the requested ATCS function (all asics).
483 * Returns a pointer to the acpi output buffer.
484 */
485static union acpi_object *amdgpu_atcs_call(struct amdgpu_atcs *atcs,
486 int function,
487 struct acpi_buffer *params)
488{
489 acpi_status status;
490 union acpi_object atcs_arg_elements[2];
491 struct acpi_object_list atcs_arg;
492 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
493
494 atcs_arg.count = 2;
495 atcs_arg.pointer = &atcs_arg_elements[0];
496
497 atcs_arg_elements[0].type = ACPI_TYPE_INTEGER;
498 atcs_arg_elements[0].integer.value = function;
499
500 if (params) {
501 atcs_arg_elements[1].type = ACPI_TYPE_BUFFER;
502 atcs_arg_elements[1].buffer.length = params->length;
503 atcs_arg_elements[1].buffer.pointer = params->pointer;
504 } else {
505 /* We need a second fake parameter */
506 atcs_arg_elements[1].type = ACPI_TYPE_INTEGER;
507 atcs_arg_elements[1].integer.value = 0;
508 }
509
510 status = acpi_evaluate_object(atcs->handle, NULL, &atcs_arg, &buffer);
511
512 /* Fail only if calling the method fails and ATIF is supported */
513 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
514 DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n",
515 acpi_format_exception(status));
516 kfree(buffer.pointer);
517 return NULL;
518 }
519
520 return buffer.pointer;
521}
522
523/**
524 * amdgpu_atcs_parse_functions - parse supported functions
525 *
526 * @f: supported functions struct
527 * @mask: supported functions mask from ATCS
528 *
529 * Use the supported functions mask from ATCS function
530 * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions
531 * are supported (all asics).
532 */
533static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mask)
534{
535 f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED;
536 f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED;
537 f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED;
538 f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED;
539 f->power_shift_control = mask & ATCS_SET_POWER_SHIFT_CONTROL_SUPPORTED;
540}
541
542/**
543 * amdgpu_atcs_verify_interface - verify ATCS
544 *
545 * @atcs: amdgpu atcs struct
546 *
547 * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function
548 * to initialize ATCS and determine what features are supported
549 * (all asics).
550 * returns 0 on success, error on failure.
551 */
552static int amdgpu_atcs_verify_interface(struct amdgpu_atcs *atcs)
553{
554 union acpi_object *info;
555 struct atcs_verify_interface output;
556 size_t size;
557 int err = 0;
558
559 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_VERIFY_INTERFACE, NULL);
560 if (!info)
561 return -EIO;
562
563 memset(&output, 0, sizeof(output));
564
565 size = *(u16 *) info->buffer.pointer;
566 if (size < 8) {
567 DRM_INFO("ATCS buffer is too small: %zu\n", size);
568 err = -EINVAL;
569 goto out;
570 }
571 size = min(sizeof(output), size);
572
573 memcpy(&output, info->buffer.pointer, size);
574
575 /* TODO: check version? */
576 DRM_DEBUG_DRIVER("ATCS version %u\n", output.version);
577
578 amdgpu_atcs_parse_functions(&atcs->functions, output.function_bits);
579
580out:
581 kfree(info);
582 return err;
583}
584
585/**
586 * amdgpu_acpi_is_pcie_performance_request_supported
587 *
588 * @adev: amdgpu_device pointer
589 *
590 * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods
591 * are supported (all asics).
592 * returns true if supported, false if not.
593 */
594bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *adev)
595{
596 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
597
598 if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy)
599 return true;
600
601 return false;
602}
603
604/**
605 * amdgpu_acpi_is_power_shift_control_supported
606 *
607 * Check if the ATCS power shift control method
608 * is supported.
609 * returns true if supported, false if not.
610 */
611bool amdgpu_acpi_is_power_shift_control_supported(void)
612{
613 return amdgpu_acpi_priv.atcs.functions.power_shift_control;
614}
615
616/**
617 * amdgpu_acpi_pcie_notify_device_ready
618 *
619 * @adev: amdgpu_device pointer
620 *
621 * Executes the PCIE_DEVICE_READY_NOTIFICATION method
622 * (all asics).
623 * returns 0 on success, error on failure.
624 */
625int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev)
626{
627 union acpi_object *info;
628 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
629
630 if (!atcs->functions.pcie_dev_rdy)
631 return -EINVAL;
632
633 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL);
634 if (!info)
635 return -EIO;
636
637 kfree(info);
638
639 return 0;
640}
641
642/**
643 * amdgpu_acpi_pcie_performance_request
644 *
645 * @adev: amdgpu_device pointer
646 * @perf_req: requested perf level (pcie gen speed)
647 * @advertise: set advertise caps flag if set
648 *
649 * Executes the PCIE_PERFORMANCE_REQUEST method to
650 * change the pcie gen speed (all asics).
651 * returns 0 on success, error on failure.
652 */
653int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev,
654 u8 perf_req, bool advertise)
655{
656 union acpi_object *info;
657 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
658 struct atcs_pref_req_input atcs_input;
659 struct atcs_pref_req_output atcs_output;
660 struct acpi_buffer params;
661 size_t size;
662 u32 retry = 3;
663
664 if (amdgpu_acpi_pcie_notify_device_ready(adev))
665 return -EINVAL;
666
667 if (!atcs->functions.pcie_perf_req)
668 return -EINVAL;
669
670 atcs_input.size = sizeof(struct atcs_pref_req_input);
671 /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
672 atcs_input.client_id = adev->pdev->devfn | (adev->pdev->bus->number << 8);
673 atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK;
674 atcs_input.flags = ATCS_WAIT_FOR_COMPLETION;
675 if (advertise)
676 atcs_input.flags |= ATCS_ADVERTISE_CAPS;
677 atcs_input.req_type = ATCS_PCIE_LINK_SPEED;
678 atcs_input.perf_req = perf_req;
679
680 params.length = sizeof(struct atcs_pref_req_input);
681 params.pointer = &atcs_input;
682
683 while (retry--) {
684 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, ¶ms);
685 if (!info)
686 return -EIO;
687
688 memset(&atcs_output, 0, sizeof(atcs_output));
689
690 size = *(u16 *) info->buffer.pointer;
691 if (size < 3) {
692 DRM_INFO("ATCS buffer is too small: %zu\n", size);
693 kfree(info);
694 return -EINVAL;
695 }
696 size = min(sizeof(atcs_output), size);
697
698 memcpy(&atcs_output, info->buffer.pointer, size);
699
700 kfree(info);
701
702 switch (atcs_output.ret_val) {
703 case ATCS_REQUEST_REFUSED:
704 default:
705 return -EINVAL;
706 case ATCS_REQUEST_COMPLETE:
707 return 0;
708 case ATCS_REQUEST_IN_PROGRESS:
709 udelay(10);
710 break;
711 }
712 }
713
714 return 0;
715}
716
717/**
718 * amdgpu_acpi_power_shift_control
719 *
720 * @adev: amdgpu_device pointer
721 * @dev_state: device acpi state
722 * @drv_state: driver state
723 *
724 * Executes the POWER_SHIFT_CONTROL method to
725 * communicate current dGPU device state and
726 * driver state to APU/SBIOS.
727 * returns 0 on success, error on failure.
728 */
729int amdgpu_acpi_power_shift_control(struct amdgpu_device *adev,
730 u8 dev_state, bool drv_state)
731{
732 union acpi_object *info;
733 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
734 struct atcs_pwr_shift_input atcs_input;
735 struct acpi_buffer params;
736
737 if (!amdgpu_acpi_is_power_shift_control_supported())
738 return -EINVAL;
739
740 atcs_input.size = sizeof(struct atcs_pwr_shift_input);
741 /* dGPU id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
742 atcs_input.dgpu_id = adev->pdev->devfn | (adev->pdev->bus->number << 8);
743 atcs_input.dev_acpi_state = dev_state;
744 atcs_input.drv_state = drv_state;
745
746 params.length = sizeof(struct atcs_pwr_shift_input);
747 params.pointer = &atcs_input;
748
749 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_POWER_SHIFT_CONTROL, ¶ms);
750 if (!info) {
751 DRM_ERROR("ATCS PSC update failed\n");
752 return -EIO;
753 }
754
755 return 0;
756}
757
758/**
759 * amdgpu_acpi_smart_shift_update - update dGPU device state to SBIOS
760 *
761 * @dev: drm_device pointer
762 * @ss_state: current smart shift event
763 *
764 * returns 0 on success,
765 * otherwise return error number.
766 */
767int amdgpu_acpi_smart_shift_update(struct drm_device *dev, enum amdgpu_ss ss_state)
768{
769 struct amdgpu_device *adev = drm_to_adev(dev);
770 int r;
771
772 if (!amdgpu_device_supports_smart_shift(dev))
773 return 0;
774
775 switch (ss_state) {
776 /* SBIOS trigger “stop”, “enable” and “start” at D0, Driver Operational.
777 * SBIOS trigger “stop” at D3, Driver Not Operational.
778 * SBIOS trigger “stop” and “disable” at D0, Driver NOT operational.
779 */
780 case AMDGPU_SS_DRV_LOAD:
781 r = amdgpu_acpi_power_shift_control(adev,
782 AMDGPU_ATCS_PSC_DEV_STATE_D0,
783 AMDGPU_ATCS_PSC_DRV_STATE_OPR);
784 break;
785 case AMDGPU_SS_DEV_D0:
786 r = amdgpu_acpi_power_shift_control(adev,
787 AMDGPU_ATCS_PSC_DEV_STATE_D0,
788 AMDGPU_ATCS_PSC_DRV_STATE_OPR);
789 break;
790 case AMDGPU_SS_DEV_D3:
791 r = amdgpu_acpi_power_shift_control(adev,
792 AMDGPU_ATCS_PSC_DEV_STATE_D3_HOT,
793 AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
794 break;
795 case AMDGPU_SS_DRV_UNLOAD:
796 r = amdgpu_acpi_power_shift_control(adev,
797 AMDGPU_ATCS_PSC_DEV_STATE_D0,
798 AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
799 break;
800 default:
801 return -EINVAL;
802 }
803
804 return r;
805}
806
807/**
808 * amdgpu_acpi_event - handle notify events
809 *
810 * @nb: notifier block
811 * @val: val
812 * @data: acpi event
813 *
814 * Calls relevant amdgpu functions in response to various
815 * acpi events.
816 * Returns NOTIFY code
817 */
818static int amdgpu_acpi_event(struct notifier_block *nb,
819 unsigned long val,
820 void *data)
821{
822 struct amdgpu_device *adev = container_of(nb, struct amdgpu_device, acpi_nb);
823 struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
824
825 if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
826 if (power_supply_is_system_supplied() > 0)
827 DRM_DEBUG_DRIVER("pm: AC\n");
828 else
829 DRM_DEBUG_DRIVER("pm: DC\n");
830
831 amdgpu_pm_acpi_event_handler(adev);
832 }
833
834 /* Check for pending SBIOS requests */
835 return amdgpu_atif_handler(adev, entry);
836}
837
838/* Call all ACPI methods here */
839/**
840 * amdgpu_acpi_init - init driver acpi support
841 *
842 * @adev: amdgpu_device pointer
843 *
844 * Verifies the AMD ACPI interfaces and registers with the acpi
845 * notifier chain (all asics).
846 * Returns 0 on success, error on failure.
847 */
848int amdgpu_acpi_init(struct amdgpu_device *adev)
849{
850 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
851
852#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
853 if (atif->notifications.brightness_change) {
854 if (amdgpu_device_has_dc_support(adev)) {
855#if defined(CONFIG_DRM_AMD_DC)
856 struct amdgpu_display_manager *dm = &adev->dm;
857 if (dm->backlight_dev)
858 atif->bd = dm->backlight_dev;
859#endif
860 } else {
861 struct drm_encoder *tmp;
862
863 /* Find the encoder controlling the brightness */
864 list_for_each_entry(tmp, &adev_to_drm(adev)->mode_config.encoder_list,
865 head) {
866 struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp);
867
868 if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
869 enc->enc_priv) {
870 struct amdgpu_encoder_atom_dig *dig = enc->enc_priv;
871 if (dig->bl_dev) {
872 atif->bd = dig->bl_dev;
873 break;
874 }
875 }
876 }
877 }
878 }
879#endif
880 adev->acpi_nb.notifier_call = amdgpu_acpi_event;
881 register_acpi_notifier(&adev->acpi_nb);
882
883 return 0;
884}
885
886void amdgpu_acpi_get_backlight_caps(struct amdgpu_dm_backlight_caps *caps)
887{
888 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
889
890 caps->caps_valid = atif->backlight_caps.caps_valid;
891 caps->min_input_signal = atif->backlight_caps.min_input_signal;
892 caps->max_input_signal = atif->backlight_caps.max_input_signal;
893}
894
895/**
896 * amdgpu_acpi_fini - tear down driver acpi support
897 *
898 * @adev: amdgpu_device pointer
899 *
900 * Unregisters with the acpi notifier chain (all asics).
901 */
902void amdgpu_acpi_fini(struct amdgpu_device *adev)
903{
904 unregister_acpi_notifier(&adev->acpi_nb);
905}
906
907/**
908 * amdgpu_atif_pci_probe_handle - look up the ATIF handle
909 *
910 * @pdev: pci device
911 *
912 * Look up the ATIF handles (all asics).
913 * Returns true if the handle is found, false if not.
914 */
915static bool amdgpu_atif_pci_probe_handle(struct pci_dev *pdev)
916{
917 char acpi_method_name[255] = { 0 };
918 struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
919 acpi_handle dhandle, atif_handle;
920 acpi_status status;
921 int ret;
922
923 dhandle = ACPI_HANDLE(&pdev->dev);
924 if (!dhandle)
925 return false;
926
927 status = acpi_get_handle(dhandle, "ATIF", &atif_handle);
928 if (ACPI_FAILURE(status)) {
929 return false;
930 }
931 amdgpu_acpi_priv.atif.handle = atif_handle;
932 acpi_get_name(amdgpu_acpi_priv.atif.handle, ACPI_FULL_PATHNAME, &buffer);
933 DRM_DEBUG_DRIVER("Found ATIF handle %s\n", acpi_method_name);
934 ret = amdgpu_atif_verify_interface(&amdgpu_acpi_priv.atif);
935 if (ret) {
936 amdgpu_acpi_priv.atif.handle = 0;
937 return false;
938 }
939 return true;
940}
941
942/**
943 * amdgpu_atcs_pci_probe_handle - look up the ATCS handle
944 *
945 * @pdev: pci device
946 *
947 * Look up the ATCS handles (all asics).
948 * Returns true if the handle is found, false if not.
949 */
950static bool amdgpu_atcs_pci_probe_handle(struct pci_dev *pdev)
951{
952 char acpi_method_name[255] = { 0 };
953 struct acpi_buffer buffer = { sizeof(acpi_method_name), acpi_method_name };
954 acpi_handle dhandle, atcs_handle;
955 acpi_status status;
956 int ret;
957
958 dhandle = ACPI_HANDLE(&pdev->dev);
959 if (!dhandle)
960 return false;
961
962 status = acpi_get_handle(dhandle, "ATCS", &atcs_handle);
963 if (ACPI_FAILURE(status)) {
964 return false;
965 }
966 amdgpu_acpi_priv.atcs.handle = atcs_handle;
967 acpi_get_name(amdgpu_acpi_priv.atcs.handle, ACPI_FULL_PATHNAME, &buffer);
968 DRM_DEBUG_DRIVER("Found ATCS handle %s\n", acpi_method_name);
969 ret = amdgpu_atcs_verify_interface(&amdgpu_acpi_priv.atcs);
970 if (ret) {
971 amdgpu_acpi_priv.atcs.handle = 0;
972 return false;
973 }
974 return true;
975}
976
977/*
978 * amdgpu_acpi_detect - detect ACPI ATIF/ATCS methods
979 *
980 * Check if we have the ATIF/ATCS methods and populate
981 * the structures in the driver.
982 */
983void amdgpu_acpi_detect(void)
984{
985 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
986 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
987 struct pci_dev *pdev = NULL;
988 int ret;
989
990 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
991 if (!atif->handle)
992 amdgpu_atif_pci_probe_handle(pdev);
993 if (!atcs->handle)
994 amdgpu_atcs_pci_probe_handle(pdev);
995 }
996
997 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
998 if (!atif->handle)
999 amdgpu_atif_pci_probe_handle(pdev);
1000 if (!atcs->handle)
1001 amdgpu_atcs_pci_probe_handle(pdev);
1002 }
1003
1004 if (atif->functions.sbios_requests && !atif->functions.system_params) {
1005 /* XXX check this workraround, if sbios request function is
1006 * present we have to see how it's configured in the system
1007 * params
1008 */
1009 atif->functions.system_params = true;
1010 }
1011
1012 if (atif->functions.system_params) {
1013 ret = amdgpu_atif_get_notification_params(atif);
1014 if (ret) {
1015 DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n",
1016 ret);
1017 /* Disable notification */
1018 atif->notification_cfg.enabled = false;
1019 }
1020 }
1021
1022 if (atif->functions.query_backlight_transfer_characteristics) {
1023 ret = amdgpu_atif_query_backlight_caps(atif);
1024 if (ret) {
1025 DRM_DEBUG_DRIVER("Call to QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS failed: %d\n",
1026 ret);
1027 atif->backlight_caps.caps_valid = false;
1028 }
1029 } else {
1030 atif->backlight_caps.caps_valid = false;
1031 }
1032}
1033
1034/**
1035 * amdgpu_acpi_is_s0ix_supported
1036 *
1037 * @adev: amdgpu_device_pointer
1038 *
1039 * returns true if supported, false if not.
1040 */
1041bool amdgpu_acpi_is_s0ix_supported(struct amdgpu_device *adev)
1042{
1043#if IS_ENABLED(CONFIG_AMD_PMC) && IS_ENABLED(CONFIG_SUSPEND)
1044 if (acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0) {
1045 if (adev->flags & AMD_IS_APU)
1046 return pm_suspend_target_state == PM_SUSPEND_TO_IDLE;
1047 }
1048#endif
1049 return false;
1050}