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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/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 */
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 *obj;
151 union acpi_object atif_arg_elements[2];
152 struct acpi_object_list atif_arg;
153 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
154
155 atif_arg.count = 2;
156 atif_arg.pointer = &atif_arg_elements[0];
157
158 atif_arg_elements[0].type = ACPI_TYPE_INTEGER;
159 atif_arg_elements[0].integer.value = function;
160
161 if (params) {
162 atif_arg_elements[1].type = ACPI_TYPE_BUFFER;
163 atif_arg_elements[1].buffer.length = params->length;
164 atif_arg_elements[1].buffer.pointer = params->pointer;
165 } else {
166 /* We need a second fake parameter */
167 atif_arg_elements[1].type = ACPI_TYPE_INTEGER;
168 atif_arg_elements[1].integer.value = 0;
169 }
170
171 status = acpi_evaluate_object(atif->handle, NULL, &atif_arg,
172 &buffer);
173 obj = (union acpi_object *)buffer.pointer;
174
175 /* Fail if calling the method fails */
176 if (ACPI_FAILURE(status)) {
177 DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n",
178 acpi_format_exception(status));
179 kfree(obj);
180 return NULL;
181 }
182
183 if (obj->type != ACPI_TYPE_BUFFER) {
184 DRM_DEBUG_DRIVER("bad object returned from ATIF: %d\n",
185 obj->type);
186 kfree(obj);
187 return NULL;
188 }
189
190 return obj;
191}
192
193/**
194 * amdgpu_atif_parse_notification - parse supported notifications
195 *
196 * @n: supported notifications struct
197 * @mask: supported notifications mask from ATIF
198 *
199 * Use the supported notifications mask from ATIF function
200 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications
201 * are supported (all asics).
202 */
203static void amdgpu_atif_parse_notification(struct amdgpu_atif_notifications *n, u32 mask)
204{
205 n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED;
206 n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED;
207 n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED;
208 n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED;
209 n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED;
210 n->gpu_package_power_limit = mask & ATIF_GPU_PACKAGE_POWER_LIMIT_REQUEST_SUPPORTED;
211}
212
213/**
214 * amdgpu_atif_parse_functions - parse supported functions
215 *
216 * @f: supported functions struct
217 * @mask: supported functions mask from ATIF
218 *
219 * Use the supported functions mask from ATIF function
220 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions
221 * are supported (all asics).
222 */
223static void amdgpu_atif_parse_functions(struct amdgpu_atif_functions *f, u32 mask)
224{
225 f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED;
226 f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED;
227 f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED;
228 f->query_backlight_transfer_characteristics =
229 mask & ATIF_QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS_SUPPORTED;
230 f->ready_to_undock = mask & ATIF_READY_TO_UNDOCK_NOTIFICATION_SUPPORTED;
231 f->external_gpu_information = mask & ATIF_GET_EXTERNAL_GPU_INFORMATION_SUPPORTED;
232}
233
234/**
235 * amdgpu_atif_verify_interface - verify ATIF
236 *
237 * @atif: amdgpu atif struct
238 *
239 * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function
240 * to initialize ATIF and determine what features are supported
241 * (all asics).
242 * returns 0 on success, error on failure.
243 */
244static int amdgpu_atif_verify_interface(struct amdgpu_atif *atif)
245{
246 union acpi_object *info;
247 struct atif_verify_interface output;
248 size_t size;
249 int err = 0;
250
251 info = amdgpu_atif_call(atif, ATIF_FUNCTION_VERIFY_INTERFACE, NULL);
252 if (!info)
253 return -EIO;
254
255 memset(&output, 0, sizeof(output));
256
257 size = *(u16 *) info->buffer.pointer;
258 if (size < 12) {
259 DRM_INFO("ATIF buffer is too small: %zu\n", size);
260 err = -EINVAL;
261 goto out;
262 }
263 size = min(sizeof(output), size);
264
265 memcpy(&output, info->buffer.pointer, size);
266
267 /* TODO: check version? */
268 DRM_DEBUG_DRIVER("ATIF version %u\n", output.version);
269
270 amdgpu_atif_parse_notification(&atif->notifications, output.notification_mask);
271 amdgpu_atif_parse_functions(&atif->functions, output.function_bits);
272
273out:
274 kfree(info);
275 return err;
276}
277
278/**
279 * amdgpu_atif_get_notification_params - determine notify configuration
280 *
281 * @atif: acpi handle
282 *
283 * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function
284 * to determine if a notifier is used and if so which one
285 * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n)
286 * where n is specified in the result if a notifier is used.
287 * Returns 0 on success, error on failure.
288 */
289static int amdgpu_atif_get_notification_params(struct amdgpu_atif *atif)
290{
291 union acpi_object *info;
292 struct amdgpu_atif_notification_cfg *n = &atif->notification_cfg;
293 struct atif_system_params params;
294 size_t size;
295 int err = 0;
296
297 info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS,
298 NULL);
299 if (!info) {
300 err = -EIO;
301 goto out;
302 }
303
304 size = *(u16 *) info->buffer.pointer;
305 if (size < 10) {
306 err = -EINVAL;
307 goto out;
308 }
309
310 memset(¶ms, 0, sizeof(params));
311 size = min(sizeof(params), size);
312 memcpy(¶ms, info->buffer.pointer, size);
313
314 DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n",
315 params.flags, params.valid_mask);
316 params.flags = params.flags & params.valid_mask;
317
318 if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) {
319 n->enabled = false;
320 n->command_code = 0;
321 } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) {
322 n->enabled = true;
323 n->command_code = 0x81;
324 } else {
325 if (size < 11) {
326 err = -EINVAL;
327 goto out;
328 }
329 n->enabled = true;
330 n->command_code = params.command_code;
331 }
332
333out:
334 DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n",
335 (n->enabled ? "enabled" : "disabled"),
336 n->command_code);
337 kfree(info);
338 return err;
339}
340
341/**
342 * amdgpu_atif_query_backlight_caps - get min and max backlight input signal
343 *
344 * @atif: acpi handle
345 *
346 * Execute the QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS ATIF function
347 * to determine the acceptable range of backlight values
348 *
349 * Backlight_caps.caps_valid will be set to true if the query is successful
350 *
351 * The input signals are in range 0-255
352 *
353 * This function assumes the display with backlight is the first LCD
354 *
355 * Returns 0 on success, error on failure.
356 */
357static int amdgpu_atif_query_backlight_caps(struct amdgpu_atif *atif)
358{
359 union acpi_object *info;
360 struct atif_qbtc_output characteristics;
361 struct atif_qbtc_arguments arguments;
362 struct acpi_buffer params;
363 size_t size;
364 int err = 0;
365
366 arguments.size = sizeof(arguments);
367 arguments.requested_display = ATIF_QBTC_REQUEST_LCD1;
368
369 params.length = sizeof(arguments);
370 params.pointer = (void *)&arguments;
371
372 info = amdgpu_atif_call(atif,
373 ATIF_FUNCTION_QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS,
374 ¶ms);
375 if (!info) {
376 err = -EIO;
377 goto out;
378 }
379
380 size = *(u16 *) info->buffer.pointer;
381 if (size < 10) {
382 err = -EINVAL;
383 goto out;
384 }
385
386 memset(&characteristics, 0, sizeof(characteristics));
387 size = min(sizeof(characteristics), size);
388 memcpy(&characteristics, info->buffer.pointer, size);
389
390 atif->backlight_caps.caps_valid = true;
391 atif->backlight_caps.min_input_signal =
392 characteristics.min_input_signal;
393 atif->backlight_caps.max_input_signal =
394 characteristics.max_input_signal;
395 atif->backlight_caps.ac_level = characteristics.ac_level;
396 atif->backlight_caps.dc_level = characteristics.dc_level;
397out:
398 kfree(info);
399 return err;
400}
401
402/**
403 * amdgpu_atif_get_sbios_requests - get requested sbios event
404 *
405 * @atif: acpi handle
406 * @req: atif sbios request struct
407 *
408 * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function
409 * to determine what requests the sbios is making to the driver
410 * (all asics).
411 * Returns 0 on success, error on failure.
412 */
413static int amdgpu_atif_get_sbios_requests(struct amdgpu_atif *atif,
414 struct atif_sbios_requests *req)
415{
416 union acpi_object *info;
417 size_t size;
418 int count = 0;
419
420 info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS,
421 NULL);
422 if (!info)
423 return -EIO;
424
425 size = *(u16 *)info->buffer.pointer;
426 if (size < 0xd) {
427 count = -EINVAL;
428 goto out;
429 }
430 memset(req, 0, sizeof(*req));
431
432 size = min(sizeof(*req), size);
433 memcpy(req, info->buffer.pointer, size);
434 DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending);
435
436 count = hweight32(req->pending);
437
438out:
439 kfree(info);
440 return count;
441}
442
443/**
444 * amdgpu_atif_handler - handle ATIF notify requests
445 *
446 * @adev: amdgpu_device pointer
447 * @event: atif sbios request struct
448 *
449 * Checks the acpi event and if it matches an atif event,
450 * handles it.
451 *
452 * Returns:
453 * NOTIFY_BAD or NOTIFY_DONE, depending on the event.
454 */
455static int amdgpu_atif_handler(struct amdgpu_device *adev,
456 struct acpi_bus_event *event)
457{
458 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
459 int count;
460
461 DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n",
462 event->device_class, event->type);
463
464 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
465 return NOTIFY_DONE;
466
467 /* Is this actually our event? */
468 if (!atif->notification_cfg.enabled ||
469 event->type != atif->notification_cfg.command_code) {
470 /* These events will generate keypresses otherwise */
471 if (event->type == ACPI_VIDEO_NOTIFY_PROBE)
472 return NOTIFY_BAD;
473 else
474 return NOTIFY_DONE;
475 }
476
477 if (atif->functions.sbios_requests) {
478 struct atif_sbios_requests req;
479
480 /* Check pending SBIOS requests */
481 count = amdgpu_atif_get_sbios_requests(atif, &req);
482
483 if (count <= 0)
484 return NOTIFY_BAD;
485
486 DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count);
487
488 if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) {
489 if (atif->bd) {
490 DRM_DEBUG_DRIVER("Changing brightness to %d\n",
491 req.backlight_level);
492 /*
493 * XXX backlight_device_set_brightness() is
494 * hardwired to post BACKLIGHT_UPDATE_SYSFS.
495 * It probably should accept 'reason' parameter.
496 */
497 backlight_device_set_brightness(atif->bd, req.backlight_level);
498 }
499 }
500
501 if (req.pending & ATIF_DGPU_DISPLAY_EVENT) {
502 if (adev->flags & AMD_IS_PX) {
503 pm_runtime_get_sync(adev_to_drm(adev)->dev);
504 /* Just fire off a uevent and let userspace tell us what to do */
505 drm_helper_hpd_irq_event(adev_to_drm(adev));
506 pm_runtime_mark_last_busy(adev_to_drm(adev)->dev);
507 pm_runtime_put_autosuspend(adev_to_drm(adev)->dev);
508 }
509 }
510 /* TODO: check other events */
511 }
512
513 /* We've handled the event, stop the notifier chain. The ACPI interface
514 * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to
515 * userspace if the event was generated only to signal a SBIOS
516 * request.
517 */
518 return NOTIFY_BAD;
519}
520
521/* Call the ATCS method
522 */
523/**
524 * amdgpu_atcs_call - call an ATCS method
525 *
526 * @atcs: atcs structure
527 * @function: the ATCS function to execute
528 * @params: ATCS function params
529 *
530 * Executes the requested ATCS function (all asics).
531 * Returns a pointer to the acpi output buffer.
532 */
533static union acpi_object *amdgpu_atcs_call(struct amdgpu_atcs *atcs,
534 int function,
535 struct acpi_buffer *params)
536{
537 acpi_status status;
538 union acpi_object atcs_arg_elements[2];
539 struct acpi_object_list atcs_arg;
540 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
541
542 atcs_arg.count = 2;
543 atcs_arg.pointer = &atcs_arg_elements[0];
544
545 atcs_arg_elements[0].type = ACPI_TYPE_INTEGER;
546 atcs_arg_elements[0].integer.value = function;
547
548 if (params) {
549 atcs_arg_elements[1].type = ACPI_TYPE_BUFFER;
550 atcs_arg_elements[1].buffer.length = params->length;
551 atcs_arg_elements[1].buffer.pointer = params->pointer;
552 } else {
553 /* We need a second fake parameter */
554 atcs_arg_elements[1].type = ACPI_TYPE_INTEGER;
555 atcs_arg_elements[1].integer.value = 0;
556 }
557
558 status = acpi_evaluate_object(atcs->handle, NULL, &atcs_arg, &buffer);
559
560 /* Fail only if calling the method fails and ATIF is supported */
561 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
562 DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n",
563 acpi_format_exception(status));
564 kfree(buffer.pointer);
565 return NULL;
566 }
567
568 return buffer.pointer;
569}
570
571/**
572 * amdgpu_atcs_parse_functions - parse supported functions
573 *
574 * @f: supported functions struct
575 * @mask: supported functions mask from ATCS
576 *
577 * Use the supported functions mask from ATCS function
578 * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions
579 * are supported (all asics).
580 */
581static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mask)
582{
583 f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED;
584 f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED;
585 f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED;
586 f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED;
587 f->power_shift_control = mask & ATCS_SET_POWER_SHIFT_CONTROL_SUPPORTED;
588}
589
590/**
591 * amdgpu_atcs_verify_interface - verify ATCS
592 *
593 * @atcs: amdgpu atcs struct
594 *
595 * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function
596 * to initialize ATCS and determine what features are supported
597 * (all asics).
598 * returns 0 on success, error on failure.
599 */
600static int amdgpu_atcs_verify_interface(struct amdgpu_atcs *atcs)
601{
602 union acpi_object *info;
603 struct atcs_verify_interface output;
604 size_t size;
605 int err = 0;
606
607 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_VERIFY_INTERFACE, NULL);
608 if (!info)
609 return -EIO;
610
611 memset(&output, 0, sizeof(output));
612
613 size = *(u16 *) info->buffer.pointer;
614 if (size < 8) {
615 DRM_INFO("ATCS buffer is too small: %zu\n", size);
616 err = -EINVAL;
617 goto out;
618 }
619 size = min(sizeof(output), size);
620
621 memcpy(&output, info->buffer.pointer, size);
622
623 /* TODO: check version? */
624 DRM_DEBUG_DRIVER("ATCS version %u\n", output.version);
625
626 amdgpu_atcs_parse_functions(&atcs->functions, output.function_bits);
627
628out:
629 kfree(info);
630 return err;
631}
632
633/**
634 * amdgpu_acpi_is_pcie_performance_request_supported
635 *
636 * @adev: amdgpu_device pointer
637 *
638 * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods
639 * are supported (all asics).
640 * returns true if supported, false if not.
641 */
642bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *adev)
643{
644 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
645
646 if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy)
647 return true;
648
649 return false;
650}
651
652/**
653 * amdgpu_acpi_is_power_shift_control_supported
654 *
655 * Check if the ATCS power shift control method
656 * is supported.
657 * returns true if supported, false if not.
658 */
659bool amdgpu_acpi_is_power_shift_control_supported(void)
660{
661 return amdgpu_acpi_priv.atcs.functions.power_shift_control;
662}
663
664/**
665 * amdgpu_acpi_pcie_notify_device_ready
666 *
667 * @adev: amdgpu_device pointer
668 *
669 * Executes the PCIE_DEVICE_READY_NOTIFICATION method
670 * (all asics).
671 * returns 0 on success, error on failure.
672 */
673int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev)
674{
675 union acpi_object *info;
676 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
677
678 if (!atcs->functions.pcie_dev_rdy)
679 return -EINVAL;
680
681 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL);
682 if (!info)
683 return -EIO;
684
685 kfree(info);
686
687 return 0;
688}
689
690/**
691 * amdgpu_acpi_pcie_performance_request
692 *
693 * @adev: amdgpu_device pointer
694 * @perf_req: requested perf level (pcie gen speed)
695 * @advertise: set advertise caps flag if set
696 *
697 * Executes the PCIE_PERFORMANCE_REQUEST method to
698 * change the pcie gen speed (all asics).
699 * returns 0 on success, error on failure.
700 */
701int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev,
702 u8 perf_req, bool advertise)
703{
704 union acpi_object *info;
705 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
706 struct atcs_pref_req_input atcs_input;
707 struct atcs_pref_req_output atcs_output;
708 struct acpi_buffer params;
709 size_t size;
710 u32 retry = 3;
711
712 if (amdgpu_acpi_pcie_notify_device_ready(adev))
713 return -EINVAL;
714
715 if (!atcs->functions.pcie_perf_req)
716 return -EINVAL;
717
718 atcs_input.size = sizeof(struct atcs_pref_req_input);
719 /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
720 atcs_input.client_id = pci_dev_id(adev->pdev);
721 atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK;
722 atcs_input.flags = ATCS_WAIT_FOR_COMPLETION;
723 if (advertise)
724 atcs_input.flags |= ATCS_ADVERTISE_CAPS;
725 atcs_input.req_type = ATCS_PCIE_LINK_SPEED;
726 atcs_input.perf_req = perf_req;
727
728 params.length = sizeof(struct atcs_pref_req_input);
729 params.pointer = &atcs_input;
730
731 while (retry--) {
732 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, ¶ms);
733 if (!info)
734 return -EIO;
735
736 memset(&atcs_output, 0, sizeof(atcs_output));
737
738 size = *(u16 *) info->buffer.pointer;
739 if (size < 3) {
740 DRM_INFO("ATCS buffer is too small: %zu\n", size);
741 kfree(info);
742 return -EINVAL;
743 }
744 size = min(sizeof(atcs_output), size);
745
746 memcpy(&atcs_output, info->buffer.pointer, size);
747
748 kfree(info);
749
750 switch (atcs_output.ret_val) {
751 case ATCS_REQUEST_REFUSED:
752 default:
753 return -EINVAL;
754 case ATCS_REQUEST_COMPLETE:
755 return 0;
756 case ATCS_REQUEST_IN_PROGRESS:
757 udelay(10);
758 break;
759 }
760 }
761
762 return 0;
763}
764
765/**
766 * amdgpu_acpi_power_shift_control
767 *
768 * @adev: amdgpu_device pointer
769 * @dev_state: device acpi state
770 * @drv_state: driver state
771 *
772 * Executes the POWER_SHIFT_CONTROL method to
773 * communicate current dGPU device state and
774 * driver state to APU/SBIOS.
775 * returns 0 on success, error on failure.
776 */
777int amdgpu_acpi_power_shift_control(struct amdgpu_device *adev,
778 u8 dev_state, bool drv_state)
779{
780 union acpi_object *info;
781 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
782 struct atcs_pwr_shift_input atcs_input;
783 struct acpi_buffer params;
784
785 if (!amdgpu_acpi_is_power_shift_control_supported())
786 return -EINVAL;
787
788 atcs_input.size = sizeof(struct atcs_pwr_shift_input);
789 /* dGPU id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
790 atcs_input.dgpu_id = pci_dev_id(adev->pdev);
791 atcs_input.dev_acpi_state = dev_state;
792 atcs_input.drv_state = drv_state;
793
794 params.length = sizeof(struct atcs_pwr_shift_input);
795 params.pointer = &atcs_input;
796
797 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_POWER_SHIFT_CONTROL, ¶ms);
798 if (!info) {
799 DRM_ERROR("ATCS PSC update failed\n");
800 return -EIO;
801 }
802
803 kfree(info);
804 return 0;
805}
806
807/**
808 * amdgpu_acpi_smart_shift_update - update dGPU device state to SBIOS
809 *
810 * @dev: drm_device pointer
811 * @ss_state: current smart shift event
812 *
813 * returns 0 on success,
814 * otherwise return error number.
815 */
816int amdgpu_acpi_smart_shift_update(struct drm_device *dev, enum amdgpu_ss ss_state)
817{
818 struct amdgpu_device *adev = drm_to_adev(dev);
819 int r;
820
821 if (!amdgpu_device_supports_smart_shift(dev))
822 return 0;
823
824 switch (ss_state) {
825 /* SBIOS trigger “stop”, “enable” and “start” at D0, Driver Operational.
826 * SBIOS trigger “stop” at D3, Driver Not Operational.
827 * SBIOS trigger “stop” and “disable” at D0, Driver NOT operational.
828 */
829 case AMDGPU_SS_DRV_LOAD:
830 r = amdgpu_acpi_power_shift_control(adev,
831 AMDGPU_ATCS_PSC_DEV_STATE_D0,
832 AMDGPU_ATCS_PSC_DRV_STATE_OPR);
833 break;
834 case AMDGPU_SS_DEV_D0:
835 r = amdgpu_acpi_power_shift_control(adev,
836 AMDGPU_ATCS_PSC_DEV_STATE_D0,
837 AMDGPU_ATCS_PSC_DRV_STATE_OPR);
838 break;
839 case AMDGPU_SS_DEV_D3:
840 r = amdgpu_acpi_power_shift_control(adev,
841 AMDGPU_ATCS_PSC_DEV_STATE_D3_HOT,
842 AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
843 break;
844 case AMDGPU_SS_DRV_UNLOAD:
845 r = amdgpu_acpi_power_shift_control(adev,
846 AMDGPU_ATCS_PSC_DEV_STATE_D0,
847 AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
848 break;
849 default:
850 return -EINVAL;
851 }
852
853 return r;
854}
855
856#ifdef CONFIG_ACPI_NUMA
857static inline uint64_t amdgpu_acpi_get_numa_size(int nid)
858{
859 /* This is directly using si_meminfo_node implementation as the
860 * function is not exported.
861 */
862 int zone_type;
863 uint64_t managed_pages = 0;
864
865 pg_data_t *pgdat = NODE_DATA(nid);
866
867 for (zone_type = 0; zone_type < MAX_NR_ZONES; zone_type++)
868 managed_pages +=
869 zone_managed_pages(&pgdat->node_zones[zone_type]);
870 return managed_pages * PAGE_SIZE;
871}
872
873static struct amdgpu_numa_info *amdgpu_acpi_get_numa_info(uint32_t pxm)
874{
875 struct amdgpu_numa_info *numa_info;
876 int nid;
877
878 numa_info = xa_load(&numa_info_xa, pxm);
879
880 if (!numa_info) {
881 struct sysinfo info;
882
883 numa_info = kzalloc(sizeof(*numa_info), GFP_KERNEL);
884 if (!numa_info)
885 return NULL;
886
887 nid = pxm_to_node(pxm);
888 numa_info->pxm = pxm;
889 numa_info->nid = nid;
890
891 if (numa_info->nid == NUMA_NO_NODE) {
892 si_meminfo(&info);
893 numa_info->size = info.totalram * info.mem_unit;
894 } else {
895 numa_info->size = amdgpu_acpi_get_numa_size(nid);
896 }
897 xa_store(&numa_info_xa, numa_info->pxm, numa_info, GFP_KERNEL);
898 }
899
900 return numa_info;
901}
902#endif
903
904/**
905 * amdgpu_acpi_get_node_id - obtain the NUMA node id for corresponding amdgpu
906 * acpi device handle
907 *
908 * @handle: acpi handle
909 * @numa_info: amdgpu_numa_info structure holding numa information
910 *
911 * Queries the ACPI interface to fetch the corresponding NUMA Node ID for a
912 * given amdgpu acpi device.
913 *
914 * Returns ACPI STATUS OK with Node ID on success or the corresponding failure reason
915 */
916static acpi_status amdgpu_acpi_get_node_id(acpi_handle handle,
917 struct amdgpu_numa_info **numa_info)
918{
919#ifdef CONFIG_ACPI_NUMA
920 u64 pxm;
921 acpi_status status;
922
923 if (!numa_info)
924 return_ACPI_STATUS(AE_ERROR);
925
926 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
927
928 if (ACPI_FAILURE(status))
929 return status;
930
931 *numa_info = amdgpu_acpi_get_numa_info(pxm);
932
933 if (!*numa_info)
934 return_ACPI_STATUS(AE_ERROR);
935
936 return_ACPI_STATUS(AE_OK);
937#else
938 return_ACPI_STATUS(AE_NOT_EXIST);
939#endif
940}
941
942static struct amdgpu_acpi_dev_info *amdgpu_acpi_get_dev(u32 sbdf)
943{
944 struct amdgpu_acpi_dev_info *acpi_dev;
945
946 if (list_empty(&amdgpu_acpi_dev_list))
947 return NULL;
948
949 list_for_each_entry(acpi_dev, &amdgpu_acpi_dev_list, list)
950 if (acpi_dev->sbdf == sbdf)
951 return acpi_dev;
952
953 return NULL;
954}
955
956static int amdgpu_acpi_dev_init(struct amdgpu_acpi_dev_info **dev_info,
957 struct amdgpu_acpi_xcc_info *xcc_info, u32 sbdf)
958{
959 struct amdgpu_acpi_dev_info *tmp;
960 union acpi_object *obj;
961 int ret = -ENOENT;
962
963 *dev_info = NULL;
964 tmp = kzalloc(sizeof(struct amdgpu_acpi_dev_info), GFP_KERNEL);
965 if (!tmp)
966 return -ENOMEM;
967
968 INIT_LIST_HEAD(&tmp->xcc_list);
969 INIT_LIST_HEAD(&tmp->list);
970 tmp->sbdf = sbdf;
971
972 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
973 AMD_XCC_DSM_GET_SUPP_MODE, NULL,
974 ACPI_TYPE_INTEGER);
975
976 if (!obj) {
977 acpi_handle_debug(xcc_info->handle,
978 "_DSM function %d evaluation failed",
979 AMD_XCC_DSM_GET_SUPP_MODE);
980 ret = -ENOENT;
981 goto out;
982 }
983
984 tmp->supp_xcp_mode = obj->integer.value & 0xFFFF;
985 ACPI_FREE(obj);
986
987 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
988 AMD_XCC_DSM_GET_XCP_MODE, NULL,
989 ACPI_TYPE_INTEGER);
990
991 if (!obj) {
992 acpi_handle_debug(xcc_info->handle,
993 "_DSM function %d evaluation failed",
994 AMD_XCC_DSM_GET_XCP_MODE);
995 ret = -ENOENT;
996 goto out;
997 }
998
999 tmp->xcp_mode = obj->integer.value & 0xFFFF;
1000 tmp->mem_mode = (obj->integer.value >> 32) & 0xFFFF;
1001 ACPI_FREE(obj);
1002
1003 /* Evaluate DSMs and fill XCC information */
1004 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
1005 AMD_XCC_DSM_GET_TMR_INFO, NULL,
1006 ACPI_TYPE_PACKAGE);
1007
1008 if (!obj || obj->package.count < 2) {
1009 acpi_handle_debug(xcc_info->handle,
1010 "_DSM function %d evaluation failed",
1011 AMD_XCC_DSM_GET_TMR_INFO);
1012 ret = -ENOENT;
1013 goto out;
1014 }
1015
1016 tmp->tmr_base = obj->package.elements[0].integer.value;
1017 tmp->tmr_size = obj->package.elements[1].integer.value;
1018 ACPI_FREE(obj);
1019
1020 DRM_DEBUG_DRIVER(
1021 "New dev(%x): Supported xcp mode: %x curr xcp_mode : %x mem mode : %x, tmr base: %llx tmr size: %llx ",
1022 tmp->sbdf, tmp->supp_xcp_mode, tmp->xcp_mode, tmp->mem_mode,
1023 tmp->tmr_base, tmp->tmr_size);
1024 list_add_tail(&tmp->list, &amdgpu_acpi_dev_list);
1025 *dev_info = tmp;
1026
1027 return 0;
1028
1029out:
1030 if (obj)
1031 ACPI_FREE(obj);
1032 kfree(tmp);
1033
1034 return ret;
1035}
1036
1037static int amdgpu_acpi_get_xcc_info(struct amdgpu_acpi_xcc_info *xcc_info,
1038 u32 *sbdf)
1039{
1040 union acpi_object *obj;
1041 acpi_status status;
1042 int ret = -ENOENT;
1043
1044 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
1045 AMD_XCC_DSM_GET_NUM_FUNCS, NULL,
1046 ACPI_TYPE_INTEGER);
1047
1048 if (!obj || obj->integer.value != AMD_XCC_DSM_NUM_FUNCS)
1049 goto out;
1050 ACPI_FREE(obj);
1051
1052 /* Evaluate DSMs and fill XCC information */
1053 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
1054 AMD_XCC_DSM_GET_VF_XCC_MAPPING, NULL,
1055 ACPI_TYPE_INTEGER);
1056
1057 if (!obj) {
1058 acpi_handle_debug(xcc_info->handle,
1059 "_DSM function %d evaluation failed",
1060 AMD_XCC_DSM_GET_VF_XCC_MAPPING);
1061 ret = -EINVAL;
1062 goto out;
1063 }
1064
1065 /* PF xcc id [39:32] */
1066 xcc_info->phy_id = (obj->integer.value >> 32) & 0xFF;
1067 /* xcp node of this xcc [47:40] */
1068 xcc_info->xcp_node = (obj->integer.value >> 40) & 0xFF;
1069 /* PF domain of this xcc [31:16] */
1070 *sbdf = (obj->integer.value) & 0xFFFF0000;
1071 /* PF bus/dev/fn of this xcc [63:48] */
1072 *sbdf |= (obj->integer.value >> 48) & 0xFFFF;
1073 ACPI_FREE(obj);
1074 obj = NULL;
1075
1076 status =
1077 amdgpu_acpi_get_node_id(xcc_info->handle, &xcc_info->numa_info);
1078
1079 /* TODO: check if this check is required */
1080 if (ACPI_SUCCESS(status))
1081 ret = 0;
1082out:
1083 if (obj)
1084 ACPI_FREE(obj);
1085
1086 return ret;
1087}
1088
1089static int amdgpu_acpi_enumerate_xcc(void)
1090{
1091 struct amdgpu_acpi_dev_info *dev_info = NULL;
1092 struct amdgpu_acpi_xcc_info *xcc_info;
1093 struct acpi_device *acpi_dev;
1094 char hid[ACPI_ID_LEN];
1095 int ret, id;
1096 u32 sbdf;
1097
1098 INIT_LIST_HEAD(&amdgpu_acpi_dev_list);
1099 xa_init(&numa_info_xa);
1100
1101 for (id = 0; id < AMD_XCC_MAX_HID; id++) {
1102 sprintf(hid, "%s%d", "AMD", AMD_XCC_HID_START + id);
1103 acpi_dev = acpi_dev_get_first_match_dev(hid, NULL, -1);
1104 /* These ACPI objects are expected to be in sequential order. If
1105 * one is not found, no need to check the rest.
1106 */
1107 if (!acpi_dev) {
1108 DRM_DEBUG_DRIVER("No matching acpi device found for %s",
1109 hid);
1110 break;
1111 }
1112
1113 xcc_info = kzalloc(sizeof(struct amdgpu_acpi_xcc_info),
1114 GFP_KERNEL);
1115 if (!xcc_info) {
1116 DRM_ERROR("Failed to allocate memory for xcc info\n");
1117 return -ENOMEM;
1118 }
1119
1120 INIT_LIST_HEAD(&xcc_info->list);
1121 xcc_info->handle = acpi_device_handle(acpi_dev);
1122 acpi_dev_put(acpi_dev);
1123
1124 ret = amdgpu_acpi_get_xcc_info(xcc_info, &sbdf);
1125 if (ret) {
1126 kfree(xcc_info);
1127 continue;
1128 }
1129
1130 dev_info = amdgpu_acpi_get_dev(sbdf);
1131
1132 if (!dev_info)
1133 ret = amdgpu_acpi_dev_init(&dev_info, xcc_info, sbdf);
1134
1135 if (ret == -ENOMEM)
1136 return ret;
1137
1138 if (!dev_info) {
1139 kfree(xcc_info);
1140 continue;
1141 }
1142
1143 list_add_tail(&xcc_info->list, &dev_info->xcc_list);
1144 }
1145
1146 return 0;
1147}
1148
1149int amdgpu_acpi_get_tmr_info(struct amdgpu_device *adev, u64 *tmr_offset,
1150 u64 *tmr_size)
1151{
1152 struct amdgpu_acpi_dev_info *dev_info;
1153 u32 sbdf;
1154
1155 if (!tmr_offset || !tmr_size)
1156 return -EINVAL;
1157
1158 sbdf = (pci_domain_nr(adev->pdev->bus) << 16);
1159 sbdf |= pci_dev_id(adev->pdev);
1160 dev_info = amdgpu_acpi_get_dev(sbdf);
1161 if (!dev_info)
1162 return -ENOENT;
1163
1164 *tmr_offset = dev_info->tmr_base;
1165 *tmr_size = dev_info->tmr_size;
1166
1167 return 0;
1168}
1169
1170int amdgpu_acpi_get_mem_info(struct amdgpu_device *adev, int xcc_id,
1171 struct amdgpu_numa_info *numa_info)
1172{
1173 struct amdgpu_acpi_dev_info *dev_info;
1174 struct amdgpu_acpi_xcc_info *xcc_info;
1175 u32 sbdf;
1176
1177 if (!numa_info)
1178 return -EINVAL;
1179
1180 sbdf = (pci_domain_nr(adev->pdev->bus) << 16);
1181 sbdf |= pci_dev_id(adev->pdev);
1182 dev_info = amdgpu_acpi_get_dev(sbdf);
1183 if (!dev_info)
1184 return -ENOENT;
1185
1186 list_for_each_entry(xcc_info, &dev_info->xcc_list, list) {
1187 if (xcc_info->phy_id == xcc_id) {
1188 memcpy(numa_info, xcc_info->numa_info,
1189 sizeof(*numa_info));
1190 return 0;
1191 }
1192 }
1193
1194 return -ENOENT;
1195}
1196
1197/**
1198 * amdgpu_acpi_event - handle notify events
1199 *
1200 * @nb: notifier block
1201 * @val: val
1202 * @data: acpi event
1203 *
1204 * Calls relevant amdgpu functions in response to various
1205 * acpi events.
1206 * Returns NOTIFY code
1207 */
1208static int amdgpu_acpi_event(struct notifier_block *nb,
1209 unsigned long val,
1210 void *data)
1211{
1212 struct amdgpu_device *adev = container_of(nb, struct amdgpu_device, acpi_nb);
1213 struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
1214
1215 if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
1216 if (power_supply_is_system_supplied() > 0)
1217 DRM_DEBUG_DRIVER("pm: AC\n");
1218 else
1219 DRM_DEBUG_DRIVER("pm: DC\n");
1220
1221 amdgpu_pm_acpi_event_handler(adev);
1222 }
1223
1224 /* Check for pending SBIOS requests */
1225 return amdgpu_atif_handler(adev, entry);
1226}
1227
1228/* Call all ACPI methods here */
1229/**
1230 * amdgpu_acpi_init - init driver acpi support
1231 *
1232 * @adev: amdgpu_device pointer
1233 *
1234 * Verifies the AMD ACPI interfaces and registers with the acpi
1235 * notifier chain (all asics).
1236 * Returns 0 on success, error on failure.
1237 */
1238int amdgpu_acpi_init(struct amdgpu_device *adev)
1239{
1240 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1241
1242 if (atif->notifications.brightness_change) {
1243 if (adev->dc_enabled) {
1244#if defined(CONFIG_DRM_AMD_DC)
1245 struct amdgpu_display_manager *dm = &adev->dm;
1246
1247 if (dm->backlight_dev[0])
1248 atif->bd = dm->backlight_dev[0];
1249#endif
1250 } else {
1251 struct drm_encoder *tmp;
1252
1253 /* Find the encoder controlling the brightness */
1254 list_for_each_entry(tmp, &adev_to_drm(adev)->mode_config.encoder_list,
1255 head) {
1256 struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp);
1257
1258 if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
1259 enc->enc_priv) {
1260 struct amdgpu_encoder_atom_dig *dig = enc->enc_priv;
1261
1262 if (dig->bl_dev) {
1263 atif->bd = dig->bl_dev;
1264 break;
1265 }
1266 }
1267 }
1268 }
1269 }
1270 adev->acpi_nb.notifier_call = amdgpu_acpi_event;
1271 register_acpi_notifier(&adev->acpi_nb);
1272
1273 return 0;
1274}
1275
1276void amdgpu_acpi_get_backlight_caps(struct amdgpu_dm_backlight_caps *caps)
1277{
1278 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1279
1280 caps->caps_valid = atif->backlight_caps.caps_valid;
1281 caps->min_input_signal = atif->backlight_caps.min_input_signal;
1282 caps->max_input_signal = atif->backlight_caps.max_input_signal;
1283 caps->ac_level = atif->backlight_caps.ac_level;
1284 caps->dc_level = atif->backlight_caps.dc_level;
1285}
1286
1287/**
1288 * amdgpu_acpi_fini - tear down driver acpi support
1289 *
1290 * @adev: amdgpu_device pointer
1291 *
1292 * Unregisters with the acpi notifier chain (all asics).
1293 */
1294void amdgpu_acpi_fini(struct amdgpu_device *adev)
1295{
1296 unregister_acpi_notifier(&adev->acpi_nb);
1297}
1298
1299/**
1300 * amdgpu_atif_pci_probe_handle - look up the ATIF handle
1301 *
1302 * @pdev: pci device
1303 *
1304 * Look up the ATIF handles (all asics).
1305 * Returns true if the handle is found, false if not.
1306 */
1307static bool amdgpu_atif_pci_probe_handle(struct pci_dev *pdev)
1308{
1309 char acpi_method_name[255] = { 0 };
1310 struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
1311 acpi_handle dhandle, atif_handle;
1312 acpi_status status;
1313 int ret;
1314
1315 dhandle = ACPI_HANDLE(&pdev->dev);
1316 if (!dhandle)
1317 return false;
1318
1319 status = acpi_get_handle(dhandle, "ATIF", &atif_handle);
1320 if (ACPI_FAILURE(status))
1321 return false;
1322
1323 amdgpu_acpi_priv.atif.handle = atif_handle;
1324 acpi_get_name(amdgpu_acpi_priv.atif.handle, ACPI_FULL_PATHNAME, &buffer);
1325 DRM_DEBUG_DRIVER("Found ATIF handle %s\n", acpi_method_name);
1326 ret = amdgpu_atif_verify_interface(&amdgpu_acpi_priv.atif);
1327 if (ret) {
1328 amdgpu_acpi_priv.atif.handle = 0;
1329 return false;
1330 }
1331 return true;
1332}
1333
1334/**
1335 * amdgpu_atcs_pci_probe_handle - look up the ATCS handle
1336 *
1337 * @pdev: pci device
1338 *
1339 * Look up the ATCS handles (all asics).
1340 * Returns true if the handle is found, false if not.
1341 */
1342static bool amdgpu_atcs_pci_probe_handle(struct pci_dev *pdev)
1343{
1344 char acpi_method_name[255] = { 0 };
1345 struct acpi_buffer buffer = { sizeof(acpi_method_name), acpi_method_name };
1346 acpi_handle dhandle, atcs_handle;
1347 acpi_status status;
1348 int ret;
1349
1350 dhandle = ACPI_HANDLE(&pdev->dev);
1351 if (!dhandle)
1352 return false;
1353
1354 status = acpi_get_handle(dhandle, "ATCS", &atcs_handle);
1355 if (ACPI_FAILURE(status))
1356 return false;
1357
1358 amdgpu_acpi_priv.atcs.handle = atcs_handle;
1359 acpi_get_name(amdgpu_acpi_priv.atcs.handle, ACPI_FULL_PATHNAME, &buffer);
1360 DRM_DEBUG_DRIVER("Found ATCS handle %s\n", acpi_method_name);
1361 ret = amdgpu_atcs_verify_interface(&amdgpu_acpi_priv.atcs);
1362 if (ret) {
1363 amdgpu_acpi_priv.atcs.handle = 0;
1364 return false;
1365 }
1366 return true;
1367}
1368
1369
1370/**
1371 * amdgpu_acpi_should_gpu_reset
1372 *
1373 * @adev: amdgpu_device_pointer
1374 *
1375 * returns true if should reset GPU, false if not
1376 */
1377bool amdgpu_acpi_should_gpu_reset(struct amdgpu_device *adev)
1378{
1379 if ((adev->flags & AMD_IS_APU) &&
1380 adev->gfx.imu.funcs) /* Not need to do mode2 reset for IMU enabled APUs */
1381 return false;
1382
1383 if ((adev->flags & AMD_IS_APU) &&
1384 amdgpu_acpi_is_s3_active(adev))
1385 return false;
1386
1387 if (amdgpu_sriov_vf(adev))
1388 return false;
1389
1390#if IS_ENABLED(CONFIG_SUSPEND)
1391 return pm_suspend_target_state != PM_SUSPEND_TO_IDLE;
1392#else
1393 return true;
1394#endif
1395}
1396
1397/*
1398 * amdgpu_acpi_detect - detect ACPI ATIF/ATCS methods
1399 *
1400 * Check if we have the ATIF/ATCS methods and populate
1401 * the structures in the driver.
1402 */
1403void amdgpu_acpi_detect(void)
1404{
1405 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1406 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
1407 struct pci_dev *pdev = NULL;
1408 int ret;
1409
1410 while ((pdev = pci_get_base_class(PCI_BASE_CLASS_DISPLAY, pdev))) {
1411 if ((pdev->class != PCI_CLASS_DISPLAY_VGA << 8) &&
1412 (pdev->class != PCI_CLASS_DISPLAY_OTHER << 8))
1413 continue;
1414
1415 if (!atif->handle)
1416 amdgpu_atif_pci_probe_handle(pdev);
1417 if (!atcs->handle)
1418 amdgpu_atcs_pci_probe_handle(pdev);
1419 }
1420
1421 if (atif->functions.sbios_requests && !atif->functions.system_params) {
1422 /* XXX check this workraround, if sbios request function is
1423 * present we have to see how it's configured in the system
1424 * params
1425 */
1426 atif->functions.system_params = true;
1427 }
1428
1429 if (atif->functions.system_params) {
1430 ret = amdgpu_atif_get_notification_params(atif);
1431 if (ret) {
1432 DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n",
1433 ret);
1434 /* Disable notification */
1435 atif->notification_cfg.enabled = false;
1436 }
1437 }
1438
1439 if (atif->functions.query_backlight_transfer_characteristics) {
1440 ret = amdgpu_atif_query_backlight_caps(atif);
1441 if (ret) {
1442 DRM_DEBUG_DRIVER("Call to QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS failed: %d\n",
1443 ret);
1444 atif->backlight_caps.caps_valid = false;
1445 }
1446 } else {
1447 atif->backlight_caps.caps_valid = false;
1448 }
1449
1450 amdgpu_acpi_enumerate_xcc();
1451}
1452
1453void amdgpu_acpi_release(void)
1454{
1455 struct amdgpu_acpi_dev_info *dev_info, *dev_tmp;
1456 struct amdgpu_acpi_xcc_info *xcc_info, *xcc_tmp;
1457 struct amdgpu_numa_info *numa_info;
1458 unsigned long index;
1459
1460 xa_for_each(&numa_info_xa, index, numa_info) {
1461 kfree(numa_info);
1462 xa_erase(&numa_info_xa, index);
1463 }
1464
1465 if (list_empty(&amdgpu_acpi_dev_list))
1466 return;
1467
1468 list_for_each_entry_safe(dev_info, dev_tmp, &amdgpu_acpi_dev_list,
1469 list) {
1470 list_for_each_entry_safe(xcc_info, xcc_tmp, &dev_info->xcc_list,
1471 list) {
1472 list_del(&xcc_info->list);
1473 kfree(xcc_info);
1474 }
1475
1476 list_del(&dev_info->list);
1477 kfree(dev_info);
1478 }
1479}
1480
1481#if IS_ENABLED(CONFIG_SUSPEND)
1482/**
1483 * amdgpu_acpi_is_s3_active
1484 *
1485 * @adev: amdgpu_device_pointer
1486 *
1487 * returns true if supported, false if not.
1488 */
1489bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev)
1490{
1491 return !(adev->flags & AMD_IS_APU) ||
1492 (pm_suspend_target_state == PM_SUSPEND_MEM);
1493}
1494
1495/**
1496 * amdgpu_acpi_is_s0ix_active
1497 *
1498 * @adev: amdgpu_device_pointer
1499 *
1500 * returns true if supported, false if not.
1501 */
1502bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev)
1503{
1504 if (!(adev->flags & AMD_IS_APU) ||
1505 (pm_suspend_target_state != PM_SUSPEND_TO_IDLE))
1506 return false;
1507
1508 if (adev->asic_type < CHIP_RAVEN)
1509 return false;
1510
1511 if (!(adev->pm.pp_feature & PP_GFXOFF_MASK))
1512 return false;
1513
1514 /*
1515 * If ACPI_FADT_LOW_POWER_S0 is not set in the FADT, it is generally
1516 * risky to do any special firmware-related preparations for entering
1517 * S0ix even though the system is suspending to idle, so return false
1518 * in that case.
1519 */
1520 if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) {
1521 dev_err_once(adev->dev,
1522 "Power consumption will be higher as BIOS has not been configured for suspend-to-idle.\n"
1523 "To use suspend-to-idle change the sleep mode in BIOS setup.\n");
1524 return false;
1525 }
1526
1527#if !IS_ENABLED(CONFIG_AMD_PMC)
1528 dev_err_once(adev->dev,
1529 "Power consumption will be higher as the kernel has not been compiled with CONFIG_AMD_PMC.\n");
1530 return false;
1531#else
1532 return true;
1533#endif /* CONFIG_AMD_PMC */
1534}
1535
1536/**
1537 * amdgpu_choose_low_power_state
1538 *
1539 * @adev: amdgpu_device_pointer
1540 *
1541 * Choose the target low power state for the GPU
1542 */
1543void amdgpu_choose_low_power_state(struct amdgpu_device *adev)
1544{
1545 if (adev->in_runpm)
1546 return;
1547
1548 if (amdgpu_acpi_is_s0ix_active(adev))
1549 adev->in_s0ix = true;
1550 else if (amdgpu_acpi_is_s3_active(adev))
1551 adev->in_s3 = true;
1552}
1553
1554#endif /* CONFIG_SUSPEND */