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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// 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/slab.h>
28#include <linux/power_supply.h>
29#include <linux/pm_runtime.h>
30#include <linux/suspend.h>
31#include <acpi/video.h>
32#include <acpi/actbl.h>
33
34#include <drm/drm_crtc_helper.h>
35#include "amdgpu.h"
36#include "amdgpu_pm.h"
37#include "amdgpu_display.h"
38#include "amd_acpi.h"
39#include "atom.h"
40
41struct amdgpu_atif_notification_cfg {
42 bool enabled;
43 int command_code;
44};
45
46struct amdgpu_atif_notifications {
47 bool thermal_state;
48 bool forced_power_state;
49 bool system_power_state;
50 bool brightness_change;
51 bool dgpu_display_event;
52 bool gpu_package_power_limit;
53};
54
55struct amdgpu_atif_functions {
56 bool system_params;
57 bool sbios_requests;
58 bool temperature_change;
59 bool query_backlight_transfer_characteristics;
60 bool ready_to_undock;
61 bool external_gpu_information;
62};
63
64struct amdgpu_atif {
65 acpi_handle handle;
66
67 struct amdgpu_atif_notifications notifications;
68 struct amdgpu_atif_functions functions;
69 struct amdgpu_atif_notification_cfg notification_cfg;
70 struct backlight_device *bd;
71 struct amdgpu_dm_backlight_caps backlight_caps;
72};
73
74struct amdgpu_atcs_functions {
75 bool get_ext_state;
76 bool pcie_perf_req;
77 bool pcie_dev_rdy;
78 bool pcie_bus_width;
79 bool power_shift_control;
80};
81
82struct amdgpu_atcs {
83 acpi_handle handle;
84
85 struct amdgpu_atcs_functions functions;
86};
87
88static struct amdgpu_acpi_priv {
89 struct amdgpu_atif atif;
90 struct amdgpu_atcs atcs;
91} amdgpu_acpi_priv;
92
93/* Call the ATIF method
94 */
95/**
96 * amdgpu_atif_call - call an ATIF method
97 *
98 * @atif: atif structure
99 * @function: the ATIF function to execute
100 * @params: ATIF function params
101 *
102 * Executes the requested ATIF function (all asics).
103 * Returns a pointer to the acpi output buffer.
104 */
105static union acpi_object *amdgpu_atif_call(struct amdgpu_atif *atif,
106 int function,
107 struct acpi_buffer *params)
108{
109 acpi_status status;
110 union acpi_object atif_arg_elements[2];
111 struct acpi_object_list atif_arg;
112 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
113
114 atif_arg.count = 2;
115 atif_arg.pointer = &atif_arg_elements[0];
116
117 atif_arg_elements[0].type = ACPI_TYPE_INTEGER;
118 atif_arg_elements[0].integer.value = function;
119
120 if (params) {
121 atif_arg_elements[1].type = ACPI_TYPE_BUFFER;
122 atif_arg_elements[1].buffer.length = params->length;
123 atif_arg_elements[1].buffer.pointer = params->pointer;
124 } else {
125 /* We need a second fake parameter */
126 atif_arg_elements[1].type = ACPI_TYPE_INTEGER;
127 atif_arg_elements[1].integer.value = 0;
128 }
129
130 status = acpi_evaluate_object(atif->handle, NULL, &atif_arg,
131 &buffer);
132
133 /* Fail only if calling the method fails and ATIF is supported */
134 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
135 DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n",
136 acpi_format_exception(status));
137 kfree(buffer.pointer);
138 return NULL;
139 }
140
141 return buffer.pointer;
142}
143
144/**
145 * amdgpu_atif_parse_notification - parse supported notifications
146 *
147 * @n: supported notifications struct
148 * @mask: supported notifications mask from ATIF
149 *
150 * Use the supported notifications mask from ATIF function
151 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications
152 * are supported (all asics).
153 */
154static void amdgpu_atif_parse_notification(struct amdgpu_atif_notifications *n, u32 mask)
155{
156 n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED;
157 n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED;
158 n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED;
159 n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED;
160 n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED;
161 n->gpu_package_power_limit = mask & ATIF_GPU_PACKAGE_POWER_LIMIT_REQUEST_SUPPORTED;
162}
163
164/**
165 * amdgpu_atif_parse_functions - parse supported functions
166 *
167 * @f: supported functions struct
168 * @mask: supported functions mask from ATIF
169 *
170 * Use the supported functions mask from ATIF function
171 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions
172 * are supported (all asics).
173 */
174static void amdgpu_atif_parse_functions(struct amdgpu_atif_functions *f, u32 mask)
175{
176 f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED;
177 f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED;
178 f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED;
179 f->query_backlight_transfer_characteristics =
180 mask & ATIF_QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS_SUPPORTED;
181 f->ready_to_undock = mask & ATIF_READY_TO_UNDOCK_NOTIFICATION_SUPPORTED;
182 f->external_gpu_information = mask & ATIF_GET_EXTERNAL_GPU_INFORMATION_SUPPORTED;
183}
184
185/**
186 * amdgpu_atif_verify_interface - verify ATIF
187 *
188 * @atif: amdgpu atif struct
189 *
190 * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function
191 * to initialize ATIF and determine what features are supported
192 * (all asics).
193 * returns 0 on success, error on failure.
194 */
195static int amdgpu_atif_verify_interface(struct amdgpu_atif *atif)
196{
197 union acpi_object *info;
198 struct atif_verify_interface output;
199 size_t size;
200 int err = 0;
201
202 info = amdgpu_atif_call(atif, ATIF_FUNCTION_VERIFY_INTERFACE, NULL);
203 if (!info)
204 return -EIO;
205
206 memset(&output, 0, sizeof(output));
207
208 size = *(u16 *) info->buffer.pointer;
209 if (size < 12) {
210 DRM_INFO("ATIF buffer is too small: %zu\n", size);
211 err = -EINVAL;
212 goto out;
213 }
214 size = min(sizeof(output), size);
215
216 memcpy(&output, info->buffer.pointer, size);
217
218 /* TODO: check version? */
219 DRM_DEBUG_DRIVER("ATIF version %u\n", output.version);
220
221 amdgpu_atif_parse_notification(&atif->notifications, output.notification_mask);
222 amdgpu_atif_parse_functions(&atif->functions, output.function_bits);
223
224out:
225 kfree(info);
226 return err;
227}
228
229/**
230 * amdgpu_atif_get_notification_params - determine notify configuration
231 *
232 * @atif: acpi handle
233 *
234 * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function
235 * to determine if a notifier is used and if so which one
236 * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n)
237 * where n is specified in the result if a notifier is used.
238 * Returns 0 on success, error on failure.
239 */
240static int amdgpu_atif_get_notification_params(struct amdgpu_atif *atif)
241{
242 union acpi_object *info;
243 struct amdgpu_atif_notification_cfg *n = &atif->notification_cfg;
244 struct atif_system_params params;
245 size_t size;
246 int err = 0;
247
248 info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS,
249 NULL);
250 if (!info) {
251 err = -EIO;
252 goto out;
253 }
254
255 size = *(u16 *) info->buffer.pointer;
256 if (size < 10) {
257 err = -EINVAL;
258 goto out;
259 }
260
261 memset(¶ms, 0, sizeof(params));
262 size = min(sizeof(params), size);
263 memcpy(¶ms, info->buffer.pointer, size);
264
265 DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n",
266 params.flags, params.valid_mask);
267 params.flags = params.flags & params.valid_mask;
268
269 if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) {
270 n->enabled = false;
271 n->command_code = 0;
272 } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) {
273 n->enabled = true;
274 n->command_code = 0x81;
275 } else {
276 if (size < 11) {
277 err = -EINVAL;
278 goto out;
279 }
280 n->enabled = true;
281 n->command_code = params.command_code;
282 }
283
284out:
285 DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n",
286 (n->enabled ? "enabled" : "disabled"),
287 n->command_code);
288 kfree(info);
289 return err;
290}
291
292/**
293 * amdgpu_atif_query_backlight_caps - get min and max backlight input signal
294 *
295 * @atif: acpi handle
296 *
297 * Execute the QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS ATIF function
298 * to determine the acceptable range of backlight values
299 *
300 * Backlight_caps.caps_valid will be set to true if the query is successful
301 *
302 * The input signals are in range 0-255
303 *
304 * This function assumes the display with backlight is the first LCD
305 *
306 * Returns 0 on success, error on failure.
307 */
308static int amdgpu_atif_query_backlight_caps(struct amdgpu_atif *atif)
309{
310 union acpi_object *info;
311 struct atif_qbtc_output characteristics;
312 struct atif_qbtc_arguments arguments;
313 struct acpi_buffer params;
314 size_t size;
315 int err = 0;
316
317 arguments.size = sizeof(arguments);
318 arguments.requested_display = ATIF_QBTC_REQUEST_LCD1;
319
320 params.length = sizeof(arguments);
321 params.pointer = (void *)&arguments;
322
323 info = amdgpu_atif_call(atif,
324 ATIF_FUNCTION_QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS,
325 ¶ms);
326 if (!info) {
327 err = -EIO;
328 goto out;
329 }
330
331 size = *(u16 *) info->buffer.pointer;
332 if (size < 10) {
333 err = -EINVAL;
334 goto out;
335 }
336
337 memset(&characteristics, 0, sizeof(characteristics));
338 size = min(sizeof(characteristics), size);
339 memcpy(&characteristics, info->buffer.pointer, size);
340
341 atif->backlight_caps.caps_valid = true;
342 atif->backlight_caps.min_input_signal =
343 characteristics.min_input_signal;
344 atif->backlight_caps.max_input_signal =
345 characteristics.max_input_signal;
346out:
347 kfree(info);
348 return err;
349}
350
351/**
352 * amdgpu_atif_get_sbios_requests - get requested sbios event
353 *
354 * @atif: acpi handle
355 * @req: atif sbios request struct
356 *
357 * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function
358 * to determine what requests the sbios is making to the driver
359 * (all asics).
360 * Returns 0 on success, error on failure.
361 */
362static int amdgpu_atif_get_sbios_requests(struct amdgpu_atif *atif,
363 struct atif_sbios_requests *req)
364{
365 union acpi_object *info;
366 size_t size;
367 int count = 0;
368
369 info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS,
370 NULL);
371 if (!info)
372 return -EIO;
373
374 size = *(u16 *)info->buffer.pointer;
375 if (size < 0xd) {
376 count = -EINVAL;
377 goto out;
378 }
379 memset(req, 0, sizeof(*req));
380
381 size = min(sizeof(*req), size);
382 memcpy(req, info->buffer.pointer, size);
383 DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending);
384
385 count = hweight32(req->pending);
386
387out:
388 kfree(info);
389 return count;
390}
391
392/**
393 * amdgpu_atif_handler - handle ATIF notify requests
394 *
395 * @adev: amdgpu_device pointer
396 * @event: atif sbios request struct
397 *
398 * Checks the acpi event and if it matches an atif event,
399 * handles it.
400 *
401 * Returns:
402 * NOTIFY_BAD or NOTIFY_DONE, depending on the event.
403 */
404static int amdgpu_atif_handler(struct amdgpu_device *adev,
405 struct acpi_bus_event *event)
406{
407 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
408 int count;
409
410 DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n",
411 event->device_class, event->type);
412
413 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
414 return NOTIFY_DONE;
415
416 /* Is this actually our event? */
417 if (!atif->notification_cfg.enabled ||
418 event->type != atif->notification_cfg.command_code) {
419 /* These events will generate keypresses otherwise */
420 if (event->type == ACPI_VIDEO_NOTIFY_PROBE)
421 return NOTIFY_BAD;
422 else
423 return NOTIFY_DONE;
424 }
425
426 if (atif->functions.sbios_requests) {
427 struct atif_sbios_requests req;
428
429 /* Check pending SBIOS requests */
430 count = amdgpu_atif_get_sbios_requests(atif, &req);
431
432 if (count <= 0)
433 return NOTIFY_BAD;
434
435 DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count);
436
437 if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) {
438 if (atif->bd) {
439 DRM_DEBUG_DRIVER("Changing brightness to %d\n",
440 req.backlight_level);
441 /*
442 * XXX backlight_device_set_brightness() is
443 * hardwired to post BACKLIGHT_UPDATE_SYSFS.
444 * It probably should accept 'reason' parameter.
445 */
446 backlight_device_set_brightness(atif->bd, req.backlight_level);
447 }
448 }
449
450 if (req.pending & ATIF_DGPU_DISPLAY_EVENT) {
451 if (adev->flags & AMD_IS_PX) {
452 pm_runtime_get_sync(adev_to_drm(adev)->dev);
453 /* Just fire off a uevent and let userspace tell us what to do */
454 drm_helper_hpd_irq_event(adev_to_drm(adev));
455 pm_runtime_mark_last_busy(adev_to_drm(adev)->dev);
456 pm_runtime_put_autosuspend(adev_to_drm(adev)->dev);
457 }
458 }
459 /* TODO: check other events */
460 }
461
462 /* We've handled the event, stop the notifier chain. The ACPI interface
463 * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to
464 * userspace if the event was generated only to signal a SBIOS
465 * request.
466 */
467 return NOTIFY_BAD;
468}
469
470/* Call the ATCS method
471 */
472/**
473 * amdgpu_atcs_call - call an ATCS method
474 *
475 * @atcs: atcs structure
476 * @function: the ATCS function to execute
477 * @params: ATCS function params
478 *
479 * Executes the requested ATCS function (all asics).
480 * Returns a pointer to the acpi output buffer.
481 */
482static union acpi_object *amdgpu_atcs_call(struct amdgpu_atcs *atcs,
483 int function,
484 struct acpi_buffer *params)
485{
486 acpi_status status;
487 union acpi_object atcs_arg_elements[2];
488 struct acpi_object_list atcs_arg;
489 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
490
491 atcs_arg.count = 2;
492 atcs_arg.pointer = &atcs_arg_elements[0];
493
494 atcs_arg_elements[0].type = ACPI_TYPE_INTEGER;
495 atcs_arg_elements[0].integer.value = function;
496
497 if (params) {
498 atcs_arg_elements[1].type = ACPI_TYPE_BUFFER;
499 atcs_arg_elements[1].buffer.length = params->length;
500 atcs_arg_elements[1].buffer.pointer = params->pointer;
501 } else {
502 /* We need a second fake parameter */
503 atcs_arg_elements[1].type = ACPI_TYPE_INTEGER;
504 atcs_arg_elements[1].integer.value = 0;
505 }
506
507 status = acpi_evaluate_object(atcs->handle, NULL, &atcs_arg, &buffer);
508
509 /* Fail only if calling the method fails and ATIF is supported */
510 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
511 DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n",
512 acpi_format_exception(status));
513 kfree(buffer.pointer);
514 return NULL;
515 }
516
517 return buffer.pointer;
518}
519
520/**
521 * amdgpu_atcs_parse_functions - parse supported functions
522 *
523 * @f: supported functions struct
524 * @mask: supported functions mask from ATCS
525 *
526 * Use the supported functions mask from ATCS function
527 * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions
528 * are supported (all asics).
529 */
530static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mask)
531{
532 f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED;
533 f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED;
534 f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED;
535 f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED;
536 f->power_shift_control = mask & ATCS_SET_POWER_SHIFT_CONTROL_SUPPORTED;
537}
538
539/**
540 * amdgpu_atcs_verify_interface - verify ATCS
541 *
542 * @atcs: amdgpu atcs struct
543 *
544 * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function
545 * to initialize ATCS and determine what features are supported
546 * (all asics).
547 * returns 0 on success, error on failure.
548 */
549static int amdgpu_atcs_verify_interface(struct amdgpu_atcs *atcs)
550{
551 union acpi_object *info;
552 struct atcs_verify_interface output;
553 size_t size;
554 int err = 0;
555
556 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_VERIFY_INTERFACE, NULL);
557 if (!info)
558 return -EIO;
559
560 memset(&output, 0, sizeof(output));
561
562 size = *(u16 *) info->buffer.pointer;
563 if (size < 8) {
564 DRM_INFO("ATCS buffer is too small: %zu\n", size);
565 err = -EINVAL;
566 goto out;
567 }
568 size = min(sizeof(output), size);
569
570 memcpy(&output, info->buffer.pointer, size);
571
572 /* TODO: check version? */
573 DRM_DEBUG_DRIVER("ATCS version %u\n", output.version);
574
575 amdgpu_atcs_parse_functions(&atcs->functions, output.function_bits);
576
577out:
578 kfree(info);
579 return err;
580}
581
582/**
583 * amdgpu_acpi_is_pcie_performance_request_supported
584 *
585 * @adev: amdgpu_device pointer
586 *
587 * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods
588 * are supported (all asics).
589 * returns true if supported, false if not.
590 */
591bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *adev)
592{
593 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
594
595 if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy)
596 return true;
597
598 return false;
599}
600
601/**
602 * amdgpu_acpi_is_power_shift_control_supported
603 *
604 * Check if the ATCS power shift control method
605 * is supported.
606 * returns true if supported, false if not.
607 */
608bool amdgpu_acpi_is_power_shift_control_supported(void)
609{
610 return amdgpu_acpi_priv.atcs.functions.power_shift_control;
611}
612
613/**
614 * amdgpu_acpi_pcie_notify_device_ready
615 *
616 * @adev: amdgpu_device pointer
617 *
618 * Executes the PCIE_DEVICE_READY_NOTIFICATION method
619 * (all asics).
620 * returns 0 on success, error on failure.
621 */
622int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev)
623{
624 union acpi_object *info;
625 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
626
627 if (!atcs->functions.pcie_dev_rdy)
628 return -EINVAL;
629
630 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL);
631 if (!info)
632 return -EIO;
633
634 kfree(info);
635
636 return 0;
637}
638
639/**
640 * amdgpu_acpi_pcie_performance_request
641 *
642 * @adev: amdgpu_device pointer
643 * @perf_req: requested perf level (pcie gen speed)
644 * @advertise: set advertise caps flag if set
645 *
646 * Executes the PCIE_PERFORMANCE_REQUEST method to
647 * change the pcie gen speed (all asics).
648 * returns 0 on success, error on failure.
649 */
650int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev,
651 u8 perf_req, bool advertise)
652{
653 union acpi_object *info;
654 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
655 struct atcs_pref_req_input atcs_input;
656 struct atcs_pref_req_output atcs_output;
657 struct acpi_buffer params;
658 size_t size;
659 u32 retry = 3;
660
661 if (amdgpu_acpi_pcie_notify_device_ready(adev))
662 return -EINVAL;
663
664 if (!atcs->functions.pcie_perf_req)
665 return -EINVAL;
666
667 atcs_input.size = sizeof(struct atcs_pref_req_input);
668 /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
669 atcs_input.client_id = adev->pdev->devfn | (adev->pdev->bus->number << 8);
670 atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK;
671 atcs_input.flags = ATCS_WAIT_FOR_COMPLETION;
672 if (advertise)
673 atcs_input.flags |= ATCS_ADVERTISE_CAPS;
674 atcs_input.req_type = ATCS_PCIE_LINK_SPEED;
675 atcs_input.perf_req = perf_req;
676
677 params.length = sizeof(struct atcs_pref_req_input);
678 params.pointer = &atcs_input;
679
680 while (retry--) {
681 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, ¶ms);
682 if (!info)
683 return -EIO;
684
685 memset(&atcs_output, 0, sizeof(atcs_output));
686
687 size = *(u16 *) info->buffer.pointer;
688 if (size < 3) {
689 DRM_INFO("ATCS buffer is too small: %zu\n", size);
690 kfree(info);
691 return -EINVAL;
692 }
693 size = min(sizeof(atcs_output), size);
694
695 memcpy(&atcs_output, info->buffer.pointer, size);
696
697 kfree(info);
698
699 switch (atcs_output.ret_val) {
700 case ATCS_REQUEST_REFUSED:
701 default:
702 return -EINVAL;
703 case ATCS_REQUEST_COMPLETE:
704 return 0;
705 case ATCS_REQUEST_IN_PROGRESS:
706 udelay(10);
707 break;
708 }
709 }
710
711 return 0;
712}
713
714/**
715 * amdgpu_acpi_power_shift_control
716 *
717 * @adev: amdgpu_device pointer
718 * @dev_state: device acpi state
719 * @drv_state: driver state
720 *
721 * Executes the POWER_SHIFT_CONTROL method to
722 * communicate current dGPU device state and
723 * driver state to APU/SBIOS.
724 * returns 0 on success, error on failure.
725 */
726int amdgpu_acpi_power_shift_control(struct amdgpu_device *adev,
727 u8 dev_state, bool drv_state)
728{
729 union acpi_object *info;
730 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
731 struct atcs_pwr_shift_input atcs_input;
732 struct acpi_buffer params;
733
734 if (!amdgpu_acpi_is_power_shift_control_supported())
735 return -EINVAL;
736
737 atcs_input.size = sizeof(struct atcs_pwr_shift_input);
738 /* dGPU id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
739 atcs_input.dgpu_id = adev->pdev->devfn | (adev->pdev->bus->number << 8);
740 atcs_input.dev_acpi_state = dev_state;
741 atcs_input.drv_state = drv_state;
742
743 params.length = sizeof(struct atcs_pwr_shift_input);
744 params.pointer = &atcs_input;
745
746 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_POWER_SHIFT_CONTROL, ¶ms);
747 if (!info) {
748 DRM_ERROR("ATCS PSC update failed\n");
749 return -EIO;
750 }
751
752 return 0;
753}
754
755/**
756 * amdgpu_acpi_smart_shift_update - update dGPU device state to SBIOS
757 *
758 * @dev: drm_device pointer
759 * @ss_state: current smart shift event
760 *
761 * returns 0 on success,
762 * otherwise return error number.
763 */
764int amdgpu_acpi_smart_shift_update(struct drm_device *dev, enum amdgpu_ss ss_state)
765{
766 struct amdgpu_device *adev = drm_to_adev(dev);
767 int r;
768
769 if (!amdgpu_device_supports_smart_shift(dev))
770 return 0;
771
772 switch (ss_state) {
773 /* SBIOS trigger “stop”, “enable” and “start” at D0, Driver Operational.
774 * SBIOS trigger “stop” at D3, Driver Not Operational.
775 * SBIOS trigger “stop” and “disable” at D0, Driver NOT operational.
776 */
777 case AMDGPU_SS_DRV_LOAD:
778 r = amdgpu_acpi_power_shift_control(adev,
779 AMDGPU_ATCS_PSC_DEV_STATE_D0,
780 AMDGPU_ATCS_PSC_DRV_STATE_OPR);
781 break;
782 case AMDGPU_SS_DEV_D0:
783 r = amdgpu_acpi_power_shift_control(adev,
784 AMDGPU_ATCS_PSC_DEV_STATE_D0,
785 AMDGPU_ATCS_PSC_DRV_STATE_OPR);
786 break;
787 case AMDGPU_SS_DEV_D3:
788 r = amdgpu_acpi_power_shift_control(adev,
789 AMDGPU_ATCS_PSC_DEV_STATE_D3_HOT,
790 AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
791 break;
792 case AMDGPU_SS_DRV_UNLOAD:
793 r = amdgpu_acpi_power_shift_control(adev,
794 AMDGPU_ATCS_PSC_DEV_STATE_D0,
795 AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
796 break;
797 default:
798 return -EINVAL;
799 }
800
801 return r;
802}
803
804/**
805 * amdgpu_acpi_event - handle notify events
806 *
807 * @nb: notifier block
808 * @val: val
809 * @data: acpi event
810 *
811 * Calls relevant amdgpu functions in response to various
812 * acpi events.
813 * Returns NOTIFY code
814 */
815static int amdgpu_acpi_event(struct notifier_block *nb,
816 unsigned long val,
817 void *data)
818{
819 struct amdgpu_device *adev = container_of(nb, struct amdgpu_device, acpi_nb);
820 struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
821
822 if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
823 if (power_supply_is_system_supplied() > 0)
824 DRM_DEBUG_DRIVER("pm: AC\n");
825 else
826 DRM_DEBUG_DRIVER("pm: DC\n");
827
828 amdgpu_pm_acpi_event_handler(adev);
829 }
830
831 /* Check for pending SBIOS requests */
832 return amdgpu_atif_handler(adev, entry);
833}
834
835/* Call all ACPI methods here */
836/**
837 * amdgpu_acpi_init - init driver acpi support
838 *
839 * @adev: amdgpu_device pointer
840 *
841 * Verifies the AMD ACPI interfaces and registers with the acpi
842 * notifier chain (all asics).
843 * Returns 0 on success, error on failure.
844 */
845int amdgpu_acpi_init(struct amdgpu_device *adev)
846{
847 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
848
849 if (atif->notifications.brightness_change) {
850 if (adev->dc_enabled) {
851#if defined(CONFIG_DRM_AMD_DC)
852 struct amdgpu_display_manager *dm = &adev->dm;
853
854 if (dm->backlight_dev[0])
855 atif->bd = dm->backlight_dev[0];
856#endif
857 } else {
858 struct drm_encoder *tmp;
859
860 /* Find the encoder controlling the brightness */
861 list_for_each_entry(tmp, &adev_to_drm(adev)->mode_config.encoder_list,
862 head) {
863 struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp);
864
865 if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
866 enc->enc_priv) {
867 struct amdgpu_encoder_atom_dig *dig = enc->enc_priv;
868
869 if (dig->bl_dev) {
870 atif->bd = dig->bl_dev;
871 break;
872 }
873 }
874 }
875 }
876 }
877 adev->acpi_nb.notifier_call = amdgpu_acpi_event;
878 register_acpi_notifier(&adev->acpi_nb);
879
880 return 0;
881}
882
883void amdgpu_acpi_get_backlight_caps(struct amdgpu_dm_backlight_caps *caps)
884{
885 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
886
887 caps->caps_valid = atif->backlight_caps.caps_valid;
888 caps->min_input_signal = atif->backlight_caps.min_input_signal;
889 caps->max_input_signal = atif->backlight_caps.max_input_signal;
890}
891
892/**
893 * amdgpu_acpi_fini - tear down driver acpi support
894 *
895 * @adev: amdgpu_device pointer
896 *
897 * Unregisters with the acpi notifier chain (all asics).
898 */
899void amdgpu_acpi_fini(struct amdgpu_device *adev)
900{
901 unregister_acpi_notifier(&adev->acpi_nb);
902}
903
904/**
905 * amdgpu_atif_pci_probe_handle - look up the ATIF handle
906 *
907 * @pdev: pci device
908 *
909 * Look up the ATIF handles (all asics).
910 * Returns true if the handle is found, false if not.
911 */
912static bool amdgpu_atif_pci_probe_handle(struct pci_dev *pdev)
913{
914 char acpi_method_name[255] = { 0 };
915 struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
916 acpi_handle dhandle, atif_handle;
917 acpi_status status;
918 int ret;
919
920 dhandle = ACPI_HANDLE(&pdev->dev);
921 if (!dhandle)
922 return false;
923
924 status = acpi_get_handle(dhandle, "ATIF", &atif_handle);
925 if (ACPI_FAILURE(status))
926 return false;
927
928 amdgpu_acpi_priv.atif.handle = atif_handle;
929 acpi_get_name(amdgpu_acpi_priv.atif.handle, ACPI_FULL_PATHNAME, &buffer);
930 DRM_DEBUG_DRIVER("Found ATIF handle %s\n", acpi_method_name);
931 ret = amdgpu_atif_verify_interface(&amdgpu_acpi_priv.atif);
932 if (ret) {
933 amdgpu_acpi_priv.atif.handle = 0;
934 return false;
935 }
936 return true;
937}
938
939/**
940 * amdgpu_atcs_pci_probe_handle - look up the ATCS handle
941 *
942 * @pdev: pci device
943 *
944 * Look up the ATCS handles (all asics).
945 * Returns true if the handle is found, false if not.
946 */
947static bool amdgpu_atcs_pci_probe_handle(struct pci_dev *pdev)
948{
949 char acpi_method_name[255] = { 0 };
950 struct acpi_buffer buffer = { sizeof(acpi_method_name), acpi_method_name };
951 acpi_handle dhandle, atcs_handle;
952 acpi_status status;
953 int ret;
954
955 dhandle = ACPI_HANDLE(&pdev->dev);
956 if (!dhandle)
957 return false;
958
959 status = acpi_get_handle(dhandle, "ATCS", &atcs_handle);
960 if (ACPI_FAILURE(status))
961 return false;
962
963 amdgpu_acpi_priv.atcs.handle = atcs_handle;
964 acpi_get_name(amdgpu_acpi_priv.atcs.handle, ACPI_FULL_PATHNAME, &buffer);
965 DRM_DEBUG_DRIVER("Found ATCS handle %s\n", acpi_method_name);
966 ret = amdgpu_atcs_verify_interface(&amdgpu_acpi_priv.atcs);
967 if (ret) {
968 amdgpu_acpi_priv.atcs.handle = 0;
969 return false;
970 }
971 return true;
972}
973
974/*
975 * amdgpu_acpi_detect - detect ACPI ATIF/ATCS methods
976 *
977 * Check if we have the ATIF/ATCS methods and populate
978 * the structures in the driver.
979 */
980void amdgpu_acpi_detect(void)
981{
982 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
983 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
984 struct pci_dev *pdev = NULL;
985 int ret;
986
987 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
988 if (!atif->handle)
989 amdgpu_atif_pci_probe_handle(pdev);
990 if (!atcs->handle)
991 amdgpu_atcs_pci_probe_handle(pdev);
992 }
993
994 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
995 if (!atif->handle)
996 amdgpu_atif_pci_probe_handle(pdev);
997 if (!atcs->handle)
998 amdgpu_atcs_pci_probe_handle(pdev);
999 }
1000
1001 if (atif->functions.sbios_requests && !atif->functions.system_params) {
1002 /* XXX check this workraround, if sbios request function is
1003 * present we have to see how it's configured in the system
1004 * params
1005 */
1006 atif->functions.system_params = true;
1007 }
1008
1009 if (atif->functions.system_params) {
1010 ret = amdgpu_atif_get_notification_params(atif);
1011 if (ret) {
1012 DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n",
1013 ret);
1014 /* Disable notification */
1015 atif->notification_cfg.enabled = false;
1016 }
1017 }
1018
1019 if (atif->functions.query_backlight_transfer_characteristics) {
1020 ret = amdgpu_atif_query_backlight_caps(atif);
1021 if (ret) {
1022 DRM_DEBUG_DRIVER("Call to QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS failed: %d\n",
1023 ret);
1024 atif->backlight_caps.caps_valid = false;
1025 }
1026 } else {
1027 atif->backlight_caps.caps_valid = false;
1028 }
1029}
1030
1031#if IS_ENABLED(CONFIG_SUSPEND)
1032/**
1033 * amdgpu_acpi_is_s3_active
1034 *
1035 * @adev: amdgpu_device_pointer
1036 *
1037 * returns true if supported, false if not.
1038 */
1039bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev)
1040{
1041 return !(adev->flags & AMD_IS_APU) ||
1042 (pm_suspend_target_state == PM_SUSPEND_MEM);
1043}
1044
1045/**
1046 * amdgpu_acpi_should_gpu_reset
1047 *
1048 * @adev: amdgpu_device_pointer
1049 *
1050 * returns true if should reset GPU, false if not
1051 */
1052bool amdgpu_acpi_should_gpu_reset(struct amdgpu_device *adev)
1053{
1054 if (adev->flags & AMD_IS_APU)
1055 return false;
1056
1057 if (amdgpu_sriov_vf(adev))
1058 return false;
1059
1060 return pm_suspend_target_state != PM_SUSPEND_TO_IDLE;
1061}
1062
1063/**
1064 * amdgpu_acpi_is_s0ix_active
1065 *
1066 * @adev: amdgpu_device_pointer
1067 *
1068 * returns true if supported, false if not.
1069 */
1070bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev)
1071{
1072 if (!(adev->flags & AMD_IS_APU) ||
1073 (pm_suspend_target_state != PM_SUSPEND_TO_IDLE))
1074 return false;
1075
1076 /*
1077 * If ACPI_FADT_LOW_POWER_S0 is not set in the FADT, it is generally
1078 * risky to do any special firmware-related preparations for entering
1079 * S0ix even though the system is suspending to idle, so return false
1080 * in that case.
1081 */
1082 if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) {
1083 dev_warn_once(adev->dev,
1084 "Power consumption will be higher as BIOS has not been configured for suspend-to-idle.\n"
1085 "To use suspend-to-idle change the sleep mode in BIOS setup.\n");
1086 return false;
1087 }
1088
1089#if !IS_ENABLED(CONFIG_AMD_PMC)
1090 dev_warn_once(adev->dev,
1091 "Power consumption will be higher as the kernel has not been compiled with CONFIG_AMD_PMC.\n");
1092 return false;
1093#else
1094 return true;
1095#endif /* CONFIG_AMD_PMC */
1096}
1097
1098#endif /* CONFIG_SUSPEND */