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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 *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 */
1/*
2 * Copyright 2012 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 */
23
24#include <linux/pci.h>
25#include <linux/acpi.h>
26#include <linux/slab.h>
27#include <linux/power_supply.h>
28#include <linux/pm_runtime.h>
29#include <linux/suspend.h>
30#include <acpi/video.h>
31#include <acpi/actbl.h>
32
33#include <drm/drm_crtc_helper.h>
34#include "amdgpu.h"
35#include "amdgpu_pm.h"
36#include "amdgpu_display.h"
37#include "amd_acpi.h"
38#include "atom.h"
39
40struct amdgpu_atif_notification_cfg {
41 bool enabled;
42 int command_code;
43};
44
45struct amdgpu_atif_notifications {
46 bool thermal_state;
47 bool forced_power_state;
48 bool system_power_state;
49 bool brightness_change;
50 bool dgpu_display_event;
51 bool gpu_package_power_limit;
52};
53
54struct amdgpu_atif_functions {
55 bool system_params;
56 bool sbios_requests;
57 bool temperature_change;
58 bool query_backlight_transfer_characteristics;
59 bool ready_to_undock;
60 bool external_gpu_information;
61};
62
63struct amdgpu_atif {
64 acpi_handle handle;
65
66 struct amdgpu_atif_notifications notifications;
67 struct amdgpu_atif_functions functions;
68 struct amdgpu_atif_notification_cfg notification_cfg;
69#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
70 struct backlight_device *bd;
71#endif
72 struct amdgpu_dm_backlight_caps backlight_caps;
73};
74
75struct amdgpu_atcs_functions {
76 bool get_ext_state;
77 bool pcie_perf_req;
78 bool pcie_dev_rdy;
79 bool pcie_bus_width;
80 bool power_shift_control;
81};
82
83struct amdgpu_atcs {
84 acpi_handle handle;
85
86 struct amdgpu_atcs_functions functions;
87};
88
89static struct amdgpu_acpi_priv {
90 struct amdgpu_atif atif;
91 struct amdgpu_atcs atcs;
92} amdgpu_acpi_priv;
93
94/* Call the ATIF method
95 */
96/**
97 * amdgpu_atif_call - call an ATIF method
98 *
99 * @atif: atif structure
100 * @function: the ATIF function to execute
101 * @params: ATIF function params
102 *
103 * Executes the requested ATIF function (all asics).
104 * Returns a pointer to the acpi output buffer.
105 */
106static union acpi_object *amdgpu_atif_call(struct amdgpu_atif *atif,
107 int function,
108 struct acpi_buffer *params)
109{
110 acpi_status status;
111 union acpi_object atif_arg_elements[2];
112 struct acpi_object_list atif_arg;
113 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
114
115 atif_arg.count = 2;
116 atif_arg.pointer = &atif_arg_elements[0];
117
118 atif_arg_elements[0].type = ACPI_TYPE_INTEGER;
119 atif_arg_elements[0].integer.value = function;
120
121 if (params) {
122 atif_arg_elements[1].type = ACPI_TYPE_BUFFER;
123 atif_arg_elements[1].buffer.length = params->length;
124 atif_arg_elements[1].buffer.pointer = params->pointer;
125 } else {
126 /* We need a second fake parameter */
127 atif_arg_elements[1].type = ACPI_TYPE_INTEGER;
128 atif_arg_elements[1].integer.value = 0;
129 }
130
131 status = acpi_evaluate_object(atif->handle, NULL, &atif_arg,
132 &buffer);
133
134 /* Fail only if calling the method fails and ATIF is supported */
135 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
136 DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n",
137 acpi_format_exception(status));
138 kfree(buffer.pointer);
139 return NULL;
140 }
141
142 return buffer.pointer;
143}
144
145/**
146 * amdgpu_atif_parse_notification - parse supported notifications
147 *
148 * @n: supported notifications struct
149 * @mask: supported notifications mask from ATIF
150 *
151 * Use the supported notifications mask from ATIF function
152 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications
153 * are supported (all asics).
154 */
155static void amdgpu_atif_parse_notification(struct amdgpu_atif_notifications *n, u32 mask)
156{
157 n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED;
158 n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED;
159 n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED;
160 n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED;
161 n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED;
162 n->gpu_package_power_limit = mask & ATIF_GPU_PACKAGE_POWER_LIMIT_REQUEST_SUPPORTED;
163}
164
165/**
166 * amdgpu_atif_parse_functions - parse supported functions
167 *
168 * @f: supported functions struct
169 * @mask: supported functions mask from ATIF
170 *
171 * Use the supported functions mask from ATIF function
172 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions
173 * are supported (all asics).
174 */
175static void amdgpu_atif_parse_functions(struct amdgpu_atif_functions *f, u32 mask)
176{
177 f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED;
178 f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED;
179 f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED;
180 f->query_backlight_transfer_characteristics =
181 mask & ATIF_QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS_SUPPORTED;
182 f->ready_to_undock = mask & ATIF_READY_TO_UNDOCK_NOTIFICATION_SUPPORTED;
183 f->external_gpu_information = mask & ATIF_GET_EXTERNAL_GPU_INFORMATION_SUPPORTED;
184}
185
186/**
187 * amdgpu_atif_verify_interface - verify ATIF
188 *
189 * @atif: amdgpu atif struct
190 *
191 * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function
192 * to initialize ATIF and determine what features are supported
193 * (all asics).
194 * returns 0 on success, error on failure.
195 */
196static int amdgpu_atif_verify_interface(struct amdgpu_atif *atif)
197{
198 union acpi_object *info;
199 struct atif_verify_interface output;
200 size_t size;
201 int err = 0;
202
203 info = amdgpu_atif_call(atif, ATIF_FUNCTION_VERIFY_INTERFACE, NULL);
204 if (!info)
205 return -EIO;
206
207 memset(&output, 0, sizeof(output));
208
209 size = *(u16 *) info->buffer.pointer;
210 if (size < 12) {
211 DRM_INFO("ATIF buffer is too small: %zu\n", size);
212 err = -EINVAL;
213 goto out;
214 }
215 size = min(sizeof(output), size);
216
217 memcpy(&output, info->buffer.pointer, size);
218
219 /* TODO: check version? */
220 DRM_DEBUG_DRIVER("ATIF version %u\n", output.version);
221
222 amdgpu_atif_parse_notification(&atif->notifications, output.notification_mask);
223 amdgpu_atif_parse_functions(&atif->functions, output.function_bits);
224
225out:
226 kfree(info);
227 return err;
228}
229
230/**
231 * amdgpu_atif_get_notification_params - determine notify configuration
232 *
233 * @atif: acpi handle
234 *
235 * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function
236 * to determine if a notifier is used and if so which one
237 * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n)
238 * where n is specified in the result if a notifier is used.
239 * Returns 0 on success, error on failure.
240 */
241static int amdgpu_atif_get_notification_params(struct amdgpu_atif *atif)
242{
243 union acpi_object *info;
244 struct amdgpu_atif_notification_cfg *n = &atif->notification_cfg;
245 struct atif_system_params params;
246 size_t size;
247 int err = 0;
248
249 info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS,
250 NULL);
251 if (!info) {
252 err = -EIO;
253 goto out;
254 }
255
256 size = *(u16 *) info->buffer.pointer;
257 if (size < 10) {
258 err = -EINVAL;
259 goto out;
260 }
261
262 memset(¶ms, 0, sizeof(params));
263 size = min(sizeof(params), size);
264 memcpy(¶ms, info->buffer.pointer, size);
265
266 DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n",
267 params.flags, params.valid_mask);
268 params.flags = params.flags & params.valid_mask;
269
270 if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) {
271 n->enabled = false;
272 n->command_code = 0;
273 } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) {
274 n->enabled = true;
275 n->command_code = 0x81;
276 } else {
277 if (size < 11) {
278 err = -EINVAL;
279 goto out;
280 }
281 n->enabled = true;
282 n->command_code = params.command_code;
283 }
284
285out:
286 DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n",
287 (n->enabled ? "enabled" : "disabled"),
288 n->command_code);
289 kfree(info);
290 return err;
291}
292
293/**
294 * amdgpu_atif_query_backlight_caps - get min and max backlight input signal
295 *
296 * @atif: acpi handle
297 *
298 * Execute the QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS ATIF function
299 * to determine the acceptable range of backlight values
300 *
301 * Backlight_caps.caps_valid will be set to true if the query is successful
302 *
303 * The input signals are in range 0-255
304 *
305 * This function assumes the display with backlight is the first LCD
306 *
307 * Returns 0 on success, error on failure.
308 */
309static int amdgpu_atif_query_backlight_caps(struct amdgpu_atif *atif)
310{
311 union acpi_object *info;
312 struct atif_qbtc_output characteristics;
313 struct atif_qbtc_arguments arguments;
314 struct acpi_buffer params;
315 size_t size;
316 int err = 0;
317
318 arguments.size = sizeof(arguments);
319 arguments.requested_display = ATIF_QBTC_REQUEST_LCD1;
320
321 params.length = sizeof(arguments);
322 params.pointer = (void *)&arguments;
323
324 info = amdgpu_atif_call(atif,
325 ATIF_FUNCTION_QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS,
326 ¶ms);
327 if (!info) {
328 err = -EIO;
329 goto out;
330 }
331
332 size = *(u16 *) info->buffer.pointer;
333 if (size < 10) {
334 err = -EINVAL;
335 goto out;
336 }
337
338 memset(&characteristics, 0, sizeof(characteristics));
339 size = min(sizeof(characteristics), size);
340 memcpy(&characteristics, info->buffer.pointer, size);
341
342 atif->backlight_caps.caps_valid = true;
343 atif->backlight_caps.min_input_signal =
344 characteristics.min_input_signal;
345 atif->backlight_caps.max_input_signal =
346 characteristics.max_input_signal;
347out:
348 kfree(info);
349 return err;
350}
351
352/**
353 * amdgpu_atif_get_sbios_requests - get requested sbios event
354 *
355 * @atif: acpi handle
356 * @req: atif sbios request struct
357 *
358 * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function
359 * to determine what requests the sbios is making to the driver
360 * (all asics).
361 * Returns 0 on success, error on failure.
362 */
363static int amdgpu_atif_get_sbios_requests(struct amdgpu_atif *atif,
364 struct atif_sbios_requests *req)
365{
366 union acpi_object *info;
367 size_t size;
368 int count = 0;
369
370 info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS,
371 NULL);
372 if (!info)
373 return -EIO;
374
375 size = *(u16 *)info->buffer.pointer;
376 if (size < 0xd) {
377 count = -EINVAL;
378 goto out;
379 }
380 memset(req, 0, sizeof(*req));
381
382 size = min(sizeof(*req), size);
383 memcpy(req, info->buffer.pointer, size);
384 DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending);
385
386 count = hweight32(req->pending);
387
388out:
389 kfree(info);
390 return count;
391}
392
393/**
394 * amdgpu_atif_handler - handle ATIF notify requests
395 *
396 * @adev: amdgpu_device pointer
397 * @event: atif sbios request struct
398 *
399 * Checks the acpi event and if it matches an atif event,
400 * handles it.
401 *
402 * Returns:
403 * NOTIFY_BAD or NOTIFY_DONE, depending on the event.
404 */
405static int amdgpu_atif_handler(struct amdgpu_device *adev,
406 struct acpi_bus_event *event)
407{
408 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
409 int count;
410
411 DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n",
412 event->device_class, event->type);
413
414 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
415 return NOTIFY_DONE;
416
417 /* Is this actually our event? */
418 if (!atif->notification_cfg.enabled ||
419 event->type != atif->notification_cfg.command_code) {
420 /* These events will generate keypresses otherwise */
421 if (event->type == ACPI_VIDEO_NOTIFY_PROBE)
422 return NOTIFY_BAD;
423 else
424 return NOTIFY_DONE;
425 }
426
427 if (atif->functions.sbios_requests) {
428 struct atif_sbios_requests req;
429
430 /* Check pending SBIOS requests */
431 count = amdgpu_atif_get_sbios_requests(atif, &req);
432
433 if (count <= 0)
434 return NOTIFY_BAD;
435
436 DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count);
437
438 if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) {
439#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
440 if (atif->bd) {
441 DRM_DEBUG_DRIVER("Changing brightness to %d\n",
442 req.backlight_level);
443 /*
444 * XXX backlight_device_set_brightness() is
445 * hardwired to post BACKLIGHT_UPDATE_SYSFS.
446 * It probably should accept 'reason' parameter.
447 */
448 backlight_device_set_brightness(atif->bd, req.backlight_level);
449 }
450#endif
451 }
452
453 if (req.pending & ATIF_DGPU_DISPLAY_EVENT) {
454 if (adev->flags & AMD_IS_PX) {
455 pm_runtime_get_sync(adev_to_drm(adev)->dev);
456 /* Just fire off a uevent and let userspace tell us what to do */
457 drm_helper_hpd_irq_event(adev_to_drm(adev));
458 pm_runtime_mark_last_busy(adev_to_drm(adev)->dev);
459 pm_runtime_put_autosuspend(adev_to_drm(adev)->dev);
460 }
461 }
462 /* TODO: check other events */
463 }
464
465 /* We've handled the event, stop the notifier chain. The ACPI interface
466 * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to
467 * userspace if the event was generated only to signal a SBIOS
468 * request.
469 */
470 return NOTIFY_BAD;
471}
472
473/* Call the ATCS method
474 */
475/**
476 * amdgpu_atcs_call - call an ATCS method
477 *
478 * @atcs: atcs structure
479 * @function: the ATCS function to execute
480 * @params: ATCS function params
481 *
482 * Executes the requested ATCS function (all asics).
483 * Returns a pointer to the acpi output buffer.
484 */
485static union acpi_object *amdgpu_atcs_call(struct amdgpu_atcs *atcs,
486 int function,
487 struct acpi_buffer *params)
488{
489 acpi_status status;
490 union acpi_object atcs_arg_elements[2];
491 struct acpi_object_list atcs_arg;
492 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
493
494 atcs_arg.count = 2;
495 atcs_arg.pointer = &atcs_arg_elements[0];
496
497 atcs_arg_elements[0].type = ACPI_TYPE_INTEGER;
498 atcs_arg_elements[0].integer.value = function;
499
500 if (params) {
501 atcs_arg_elements[1].type = ACPI_TYPE_BUFFER;
502 atcs_arg_elements[1].buffer.length = params->length;
503 atcs_arg_elements[1].buffer.pointer = params->pointer;
504 } else {
505 /* We need a second fake parameter */
506 atcs_arg_elements[1].type = ACPI_TYPE_INTEGER;
507 atcs_arg_elements[1].integer.value = 0;
508 }
509
510 status = acpi_evaluate_object(atcs->handle, NULL, &atcs_arg, &buffer);
511
512 /* Fail only if calling the method fails and ATIF is supported */
513 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
514 DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n",
515 acpi_format_exception(status));
516 kfree(buffer.pointer);
517 return NULL;
518 }
519
520 return buffer.pointer;
521}
522
523/**
524 * amdgpu_atcs_parse_functions - parse supported functions
525 *
526 * @f: supported functions struct
527 * @mask: supported functions mask from ATCS
528 *
529 * Use the supported functions mask from ATCS function
530 * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions
531 * are supported (all asics).
532 */
533static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mask)
534{
535 f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED;
536 f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED;
537 f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED;
538 f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED;
539 f->power_shift_control = mask & ATCS_SET_POWER_SHIFT_CONTROL_SUPPORTED;
540}
541
542/**
543 * amdgpu_atcs_verify_interface - verify ATCS
544 *
545 * @atcs: amdgpu atcs struct
546 *
547 * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function
548 * to initialize ATCS and determine what features are supported
549 * (all asics).
550 * returns 0 on success, error on failure.
551 */
552static int amdgpu_atcs_verify_interface(struct amdgpu_atcs *atcs)
553{
554 union acpi_object *info;
555 struct atcs_verify_interface output;
556 size_t size;
557 int err = 0;
558
559 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_VERIFY_INTERFACE, NULL);
560 if (!info)
561 return -EIO;
562
563 memset(&output, 0, sizeof(output));
564
565 size = *(u16 *) info->buffer.pointer;
566 if (size < 8) {
567 DRM_INFO("ATCS buffer is too small: %zu\n", size);
568 err = -EINVAL;
569 goto out;
570 }
571 size = min(sizeof(output), size);
572
573 memcpy(&output, info->buffer.pointer, size);
574
575 /* TODO: check version? */
576 DRM_DEBUG_DRIVER("ATCS version %u\n", output.version);
577
578 amdgpu_atcs_parse_functions(&atcs->functions, output.function_bits);
579
580out:
581 kfree(info);
582 return err;
583}
584
585/**
586 * amdgpu_acpi_is_pcie_performance_request_supported
587 *
588 * @adev: amdgpu_device pointer
589 *
590 * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods
591 * are supported (all asics).
592 * returns true if supported, false if not.
593 */
594bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *adev)
595{
596 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
597
598 if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy)
599 return true;
600
601 return false;
602}
603
604/**
605 * amdgpu_acpi_is_power_shift_control_supported
606 *
607 * Check if the ATCS power shift control method
608 * is supported.
609 * returns true if supported, false if not.
610 */
611bool amdgpu_acpi_is_power_shift_control_supported(void)
612{
613 return amdgpu_acpi_priv.atcs.functions.power_shift_control;
614}
615
616/**
617 * amdgpu_acpi_pcie_notify_device_ready
618 *
619 * @adev: amdgpu_device pointer
620 *
621 * Executes the PCIE_DEVICE_READY_NOTIFICATION method
622 * (all asics).
623 * returns 0 on success, error on failure.
624 */
625int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev)
626{
627 union acpi_object *info;
628 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
629
630 if (!atcs->functions.pcie_dev_rdy)
631 return -EINVAL;
632
633 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL);
634 if (!info)
635 return -EIO;
636
637 kfree(info);
638
639 return 0;
640}
641
642/**
643 * amdgpu_acpi_pcie_performance_request
644 *
645 * @adev: amdgpu_device pointer
646 * @perf_req: requested perf level (pcie gen speed)
647 * @advertise: set advertise caps flag if set
648 *
649 * Executes the PCIE_PERFORMANCE_REQUEST method to
650 * change the pcie gen speed (all asics).
651 * returns 0 on success, error on failure.
652 */
653int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev,
654 u8 perf_req, bool advertise)
655{
656 union acpi_object *info;
657 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
658 struct atcs_pref_req_input atcs_input;
659 struct atcs_pref_req_output atcs_output;
660 struct acpi_buffer params;
661 size_t size;
662 u32 retry = 3;
663
664 if (amdgpu_acpi_pcie_notify_device_ready(adev))
665 return -EINVAL;
666
667 if (!atcs->functions.pcie_perf_req)
668 return -EINVAL;
669
670 atcs_input.size = sizeof(struct atcs_pref_req_input);
671 /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
672 atcs_input.client_id = adev->pdev->devfn | (adev->pdev->bus->number << 8);
673 atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK;
674 atcs_input.flags = ATCS_WAIT_FOR_COMPLETION;
675 if (advertise)
676 atcs_input.flags |= ATCS_ADVERTISE_CAPS;
677 atcs_input.req_type = ATCS_PCIE_LINK_SPEED;
678 atcs_input.perf_req = perf_req;
679
680 params.length = sizeof(struct atcs_pref_req_input);
681 params.pointer = &atcs_input;
682
683 while (retry--) {
684 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, ¶ms);
685 if (!info)
686 return -EIO;
687
688 memset(&atcs_output, 0, sizeof(atcs_output));
689
690 size = *(u16 *) info->buffer.pointer;
691 if (size < 3) {
692 DRM_INFO("ATCS buffer is too small: %zu\n", size);
693 kfree(info);
694 return -EINVAL;
695 }
696 size = min(sizeof(atcs_output), size);
697
698 memcpy(&atcs_output, info->buffer.pointer, size);
699
700 kfree(info);
701
702 switch (atcs_output.ret_val) {
703 case ATCS_REQUEST_REFUSED:
704 default:
705 return -EINVAL;
706 case ATCS_REQUEST_COMPLETE:
707 return 0;
708 case ATCS_REQUEST_IN_PROGRESS:
709 udelay(10);
710 break;
711 }
712 }
713
714 return 0;
715}
716
717/**
718 * amdgpu_acpi_power_shift_control
719 *
720 * @adev: amdgpu_device pointer
721 * @dev_state: device acpi state
722 * @drv_state: driver state
723 *
724 * Executes the POWER_SHIFT_CONTROL method to
725 * communicate current dGPU device state and
726 * driver state to APU/SBIOS.
727 * returns 0 on success, error on failure.
728 */
729int amdgpu_acpi_power_shift_control(struct amdgpu_device *adev,
730 u8 dev_state, bool drv_state)
731{
732 union acpi_object *info;
733 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
734 struct atcs_pwr_shift_input atcs_input;
735 struct acpi_buffer params;
736
737 if (!amdgpu_acpi_is_power_shift_control_supported())
738 return -EINVAL;
739
740 atcs_input.size = sizeof(struct atcs_pwr_shift_input);
741 /* dGPU id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
742 atcs_input.dgpu_id = adev->pdev->devfn | (adev->pdev->bus->number << 8);
743 atcs_input.dev_acpi_state = dev_state;
744 atcs_input.drv_state = drv_state;
745
746 params.length = sizeof(struct atcs_pwr_shift_input);
747 params.pointer = &atcs_input;
748
749 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_POWER_SHIFT_CONTROL, ¶ms);
750 if (!info) {
751 DRM_ERROR("ATCS PSC update failed\n");
752 return -EIO;
753 }
754
755 return 0;
756}
757
758/**
759 * amdgpu_acpi_smart_shift_update - update dGPU device state to SBIOS
760 *
761 * @dev: drm_device pointer
762 * @ss_state: current smart shift event
763 *
764 * returns 0 on success,
765 * otherwise return error number.
766 */
767int amdgpu_acpi_smart_shift_update(struct drm_device *dev, enum amdgpu_ss ss_state)
768{
769 struct amdgpu_device *adev = drm_to_adev(dev);
770 int r;
771
772 if (!amdgpu_device_supports_smart_shift(dev))
773 return 0;
774
775 switch (ss_state) {
776 /* SBIOS trigger “stop”, “enable” and “start” at D0, Driver Operational.
777 * SBIOS trigger “stop” at D3, Driver Not Operational.
778 * SBIOS trigger “stop” and “disable” at D0, Driver NOT operational.
779 */
780 case AMDGPU_SS_DRV_LOAD:
781 r = amdgpu_acpi_power_shift_control(adev,
782 AMDGPU_ATCS_PSC_DEV_STATE_D0,
783 AMDGPU_ATCS_PSC_DRV_STATE_OPR);
784 break;
785 case AMDGPU_SS_DEV_D0:
786 r = amdgpu_acpi_power_shift_control(adev,
787 AMDGPU_ATCS_PSC_DEV_STATE_D0,
788 AMDGPU_ATCS_PSC_DRV_STATE_OPR);
789 break;
790 case AMDGPU_SS_DEV_D3:
791 r = amdgpu_acpi_power_shift_control(adev,
792 AMDGPU_ATCS_PSC_DEV_STATE_D3_HOT,
793 AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
794 break;
795 case AMDGPU_SS_DRV_UNLOAD:
796 r = amdgpu_acpi_power_shift_control(adev,
797 AMDGPU_ATCS_PSC_DEV_STATE_D0,
798 AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
799 break;
800 default:
801 return -EINVAL;
802 }
803
804 return r;
805}
806
807/**
808 * amdgpu_acpi_event - handle notify events
809 *
810 * @nb: notifier block
811 * @val: val
812 * @data: acpi event
813 *
814 * Calls relevant amdgpu functions in response to various
815 * acpi events.
816 * Returns NOTIFY code
817 */
818static int amdgpu_acpi_event(struct notifier_block *nb,
819 unsigned long val,
820 void *data)
821{
822 struct amdgpu_device *adev = container_of(nb, struct amdgpu_device, acpi_nb);
823 struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
824
825 if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
826 if (power_supply_is_system_supplied() > 0)
827 DRM_DEBUG_DRIVER("pm: AC\n");
828 else
829 DRM_DEBUG_DRIVER("pm: DC\n");
830
831 amdgpu_pm_acpi_event_handler(adev);
832 }
833
834 /* Check for pending SBIOS requests */
835 return amdgpu_atif_handler(adev, entry);
836}
837
838/* Call all ACPI methods here */
839/**
840 * amdgpu_acpi_init - init driver acpi support
841 *
842 * @adev: amdgpu_device pointer
843 *
844 * Verifies the AMD ACPI interfaces and registers with the acpi
845 * notifier chain (all asics).
846 * Returns 0 on success, error on failure.
847 */
848int amdgpu_acpi_init(struct amdgpu_device *adev)
849{
850 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
851
852#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
853 if (atif->notifications.brightness_change) {
854 if (amdgpu_device_has_dc_support(adev)) {
855#if defined(CONFIG_DRM_AMD_DC)
856 struct amdgpu_display_manager *dm = &adev->dm;
857 if (dm->backlight_dev)
858 atif->bd = dm->backlight_dev;
859#endif
860 } else {
861 struct drm_encoder *tmp;
862
863 /* Find the encoder controlling the brightness */
864 list_for_each_entry(tmp, &adev_to_drm(adev)->mode_config.encoder_list,
865 head) {
866 struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp);
867
868 if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
869 enc->enc_priv) {
870 struct amdgpu_encoder_atom_dig *dig = enc->enc_priv;
871 if (dig->bl_dev) {
872 atif->bd = dig->bl_dev;
873 break;
874 }
875 }
876 }
877 }
878 }
879#endif
880 adev->acpi_nb.notifier_call = amdgpu_acpi_event;
881 register_acpi_notifier(&adev->acpi_nb);
882
883 return 0;
884}
885
886void amdgpu_acpi_get_backlight_caps(struct amdgpu_dm_backlight_caps *caps)
887{
888 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
889
890 caps->caps_valid = atif->backlight_caps.caps_valid;
891 caps->min_input_signal = atif->backlight_caps.min_input_signal;
892 caps->max_input_signal = atif->backlight_caps.max_input_signal;
893}
894
895/**
896 * amdgpu_acpi_fini - tear down driver acpi support
897 *
898 * @adev: amdgpu_device pointer
899 *
900 * Unregisters with the acpi notifier chain (all asics).
901 */
902void amdgpu_acpi_fini(struct amdgpu_device *adev)
903{
904 unregister_acpi_notifier(&adev->acpi_nb);
905}
906
907/**
908 * amdgpu_atif_pci_probe_handle - look up the ATIF handle
909 *
910 * @pdev: pci device
911 *
912 * Look up the ATIF handles (all asics).
913 * Returns true if the handle is found, false if not.
914 */
915static bool amdgpu_atif_pci_probe_handle(struct pci_dev *pdev)
916{
917 char acpi_method_name[255] = { 0 };
918 struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
919 acpi_handle dhandle, atif_handle;
920 acpi_status status;
921 int ret;
922
923 dhandle = ACPI_HANDLE(&pdev->dev);
924 if (!dhandle)
925 return false;
926
927 status = acpi_get_handle(dhandle, "ATIF", &atif_handle);
928 if (ACPI_FAILURE(status)) {
929 return false;
930 }
931 amdgpu_acpi_priv.atif.handle = atif_handle;
932 acpi_get_name(amdgpu_acpi_priv.atif.handle, ACPI_FULL_PATHNAME, &buffer);
933 DRM_DEBUG_DRIVER("Found ATIF handle %s\n", acpi_method_name);
934 ret = amdgpu_atif_verify_interface(&amdgpu_acpi_priv.atif);
935 if (ret) {
936 amdgpu_acpi_priv.atif.handle = 0;
937 return false;
938 }
939 return true;
940}
941
942/**
943 * amdgpu_atcs_pci_probe_handle - look up the ATCS handle
944 *
945 * @pdev: pci device
946 *
947 * Look up the ATCS handles (all asics).
948 * Returns true if the handle is found, false if not.
949 */
950static bool amdgpu_atcs_pci_probe_handle(struct pci_dev *pdev)
951{
952 char acpi_method_name[255] = { 0 };
953 struct acpi_buffer buffer = { sizeof(acpi_method_name), acpi_method_name };
954 acpi_handle dhandle, atcs_handle;
955 acpi_status status;
956 int ret;
957
958 dhandle = ACPI_HANDLE(&pdev->dev);
959 if (!dhandle)
960 return false;
961
962 status = acpi_get_handle(dhandle, "ATCS", &atcs_handle);
963 if (ACPI_FAILURE(status)) {
964 return false;
965 }
966 amdgpu_acpi_priv.atcs.handle = atcs_handle;
967 acpi_get_name(amdgpu_acpi_priv.atcs.handle, ACPI_FULL_PATHNAME, &buffer);
968 DRM_DEBUG_DRIVER("Found ATCS handle %s\n", acpi_method_name);
969 ret = amdgpu_atcs_verify_interface(&amdgpu_acpi_priv.atcs);
970 if (ret) {
971 amdgpu_acpi_priv.atcs.handle = 0;
972 return false;
973 }
974 return true;
975}
976
977/*
978 * amdgpu_acpi_detect - detect ACPI ATIF/ATCS methods
979 *
980 * Check if we have the ATIF/ATCS methods and populate
981 * the structures in the driver.
982 */
983void amdgpu_acpi_detect(void)
984{
985 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
986 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
987 struct pci_dev *pdev = NULL;
988 int ret;
989
990 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
991 if (!atif->handle)
992 amdgpu_atif_pci_probe_handle(pdev);
993 if (!atcs->handle)
994 amdgpu_atcs_pci_probe_handle(pdev);
995 }
996
997 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
998 if (!atif->handle)
999 amdgpu_atif_pci_probe_handle(pdev);
1000 if (!atcs->handle)
1001 amdgpu_atcs_pci_probe_handle(pdev);
1002 }
1003
1004 if (atif->functions.sbios_requests && !atif->functions.system_params) {
1005 /* XXX check this workraround, if sbios request function is
1006 * present we have to see how it's configured in the system
1007 * params
1008 */
1009 atif->functions.system_params = true;
1010 }
1011
1012 if (atif->functions.system_params) {
1013 ret = amdgpu_atif_get_notification_params(atif);
1014 if (ret) {
1015 DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n",
1016 ret);
1017 /* Disable notification */
1018 atif->notification_cfg.enabled = false;
1019 }
1020 }
1021
1022 if (atif->functions.query_backlight_transfer_characteristics) {
1023 ret = amdgpu_atif_query_backlight_caps(atif);
1024 if (ret) {
1025 DRM_DEBUG_DRIVER("Call to QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS failed: %d\n",
1026 ret);
1027 atif->backlight_caps.caps_valid = false;
1028 }
1029 } else {
1030 atif->backlight_caps.caps_valid = false;
1031 }
1032}
1033
1034/**
1035 * amdgpu_acpi_is_s0ix_supported
1036 *
1037 * @adev: amdgpu_device_pointer
1038 *
1039 * returns true if supported, false if not.
1040 */
1041bool amdgpu_acpi_is_s0ix_supported(struct amdgpu_device *adev)
1042{
1043#if IS_ENABLED(CONFIG_AMD_PMC) && IS_ENABLED(CONFIG_SUSPEND)
1044 if (acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0) {
1045 if (adev->flags & AMD_IS_APU)
1046 return pm_suspend_target_state == PM_SUSPEND_TO_IDLE;
1047 }
1048#endif
1049 return false;
1050}