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 */
43 static 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
57 struct xarray numa_info_xa;
58
59 /* Encapsulates the XCD acpi object information */
60 struct 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
68 struct 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
79 struct list_head amdgpu_acpi_dev_list;
80
81 struct amdgpu_atif_notification_cfg {
82 bool enabled;
83 int command_code;
84 };
85
86 struct 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
95 struct 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
104 struct 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
114 struct 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
122 struct amdgpu_atcs {
123 acpi_handle handle;
124
125 struct amdgpu_atcs_functions functions;
126 };
127
128 static 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 */
amdgpu_atif_call(struct amdgpu_atif * atif,int function,struct acpi_buffer * params)145 static union acpi_object *amdgpu_atif_call(struct amdgpu_atif *atif,
146 int function,
147 struct acpi_buffer *params)
148 {
149 acpi_status status;
150 union acpi_object atif_arg_elements[2];
151 struct acpi_object_list atif_arg;
152 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
153
154 atif_arg.count = 2;
155 atif_arg.pointer = &atif_arg_elements[0];
156
157 atif_arg_elements[0].type = ACPI_TYPE_INTEGER;
158 atif_arg_elements[0].integer.value = function;
159
160 if (params) {
161 atif_arg_elements[1].type = ACPI_TYPE_BUFFER;
162 atif_arg_elements[1].buffer.length = params->length;
163 atif_arg_elements[1].buffer.pointer = params->pointer;
164 } else {
165 /* We need a second fake parameter */
166 atif_arg_elements[1].type = ACPI_TYPE_INTEGER;
167 atif_arg_elements[1].integer.value = 0;
168 }
169
170 status = acpi_evaluate_object(atif->handle, NULL, &atif_arg,
171 &buffer);
172
173 /* Fail only if calling the method fails and ATIF is supported */
174 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
175 DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n",
176 acpi_format_exception(status));
177 kfree(buffer.pointer);
178 return NULL;
179 }
180
181 return buffer.pointer;
182 }
183
184 /**
185 * amdgpu_atif_parse_notification - parse supported notifications
186 *
187 * @n: supported notifications struct
188 * @mask: supported notifications mask from ATIF
189 *
190 * Use the supported notifications mask from ATIF function
191 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications
192 * are supported (all asics).
193 */
amdgpu_atif_parse_notification(struct amdgpu_atif_notifications * n,u32 mask)194 static void amdgpu_atif_parse_notification(struct amdgpu_atif_notifications *n, u32 mask)
195 {
196 n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED;
197 n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED;
198 n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED;
199 n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED;
200 n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED;
201 n->gpu_package_power_limit = mask & ATIF_GPU_PACKAGE_POWER_LIMIT_REQUEST_SUPPORTED;
202 }
203
204 /**
205 * amdgpu_atif_parse_functions - parse supported functions
206 *
207 * @f: supported functions struct
208 * @mask: supported functions mask from ATIF
209 *
210 * Use the supported functions mask from ATIF function
211 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions
212 * are supported (all asics).
213 */
amdgpu_atif_parse_functions(struct amdgpu_atif_functions * f,u32 mask)214 static void amdgpu_atif_parse_functions(struct amdgpu_atif_functions *f, u32 mask)
215 {
216 f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED;
217 f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED;
218 f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED;
219 f->query_backlight_transfer_characteristics =
220 mask & ATIF_QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS_SUPPORTED;
221 f->ready_to_undock = mask & ATIF_READY_TO_UNDOCK_NOTIFICATION_SUPPORTED;
222 f->external_gpu_information = mask & ATIF_GET_EXTERNAL_GPU_INFORMATION_SUPPORTED;
223 }
224
225 /**
226 * amdgpu_atif_verify_interface - verify ATIF
227 *
228 * @atif: amdgpu atif struct
229 *
230 * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function
231 * to initialize ATIF and determine what features are supported
232 * (all asics).
233 * returns 0 on success, error on failure.
234 */
amdgpu_atif_verify_interface(struct amdgpu_atif * atif)235 static int amdgpu_atif_verify_interface(struct amdgpu_atif *atif)
236 {
237 union acpi_object *info;
238 struct atif_verify_interface output;
239 size_t size;
240 int err = 0;
241
242 info = amdgpu_atif_call(atif, ATIF_FUNCTION_VERIFY_INTERFACE, NULL);
243 if (!info)
244 return -EIO;
245
246 memset(&output, 0, sizeof(output));
247
248 size = *(u16 *) info->buffer.pointer;
249 if (size < 12) {
250 DRM_INFO("ATIF buffer is too small: %zu\n", size);
251 err = -EINVAL;
252 goto out;
253 }
254 size = min(sizeof(output), size);
255
256 memcpy(&output, info->buffer.pointer, size);
257
258 /* TODO: check version? */
259 DRM_DEBUG_DRIVER("ATIF version %u\n", output.version);
260
261 amdgpu_atif_parse_notification(&atif->notifications, output.notification_mask);
262 amdgpu_atif_parse_functions(&atif->functions, output.function_bits);
263
264 out:
265 kfree(info);
266 return err;
267 }
268
269 /**
270 * amdgpu_atif_get_notification_params - determine notify configuration
271 *
272 * @atif: acpi handle
273 *
274 * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function
275 * to determine if a notifier is used and if so which one
276 * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n)
277 * where n is specified in the result if a notifier is used.
278 * Returns 0 on success, error on failure.
279 */
amdgpu_atif_get_notification_params(struct amdgpu_atif * atif)280 static int amdgpu_atif_get_notification_params(struct amdgpu_atif *atif)
281 {
282 union acpi_object *info;
283 struct amdgpu_atif_notification_cfg *n = &atif->notification_cfg;
284 struct atif_system_params params;
285 size_t size;
286 int err = 0;
287
288 info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS,
289 NULL);
290 if (!info) {
291 err = -EIO;
292 goto out;
293 }
294
295 size = *(u16 *) info->buffer.pointer;
296 if (size < 10) {
297 err = -EINVAL;
298 goto out;
299 }
300
301 memset(¶ms, 0, sizeof(params));
302 size = min(sizeof(params), size);
303 memcpy(¶ms, info->buffer.pointer, size);
304
305 DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n",
306 params.flags, params.valid_mask);
307 params.flags = params.flags & params.valid_mask;
308
309 if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) {
310 n->enabled = false;
311 n->command_code = 0;
312 } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) {
313 n->enabled = true;
314 n->command_code = 0x81;
315 } else {
316 if (size < 11) {
317 err = -EINVAL;
318 goto out;
319 }
320 n->enabled = true;
321 n->command_code = params.command_code;
322 }
323
324 out:
325 DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n",
326 (n->enabled ? "enabled" : "disabled"),
327 n->command_code);
328 kfree(info);
329 return err;
330 }
331
332 /**
333 * amdgpu_atif_query_backlight_caps - get min and max backlight input signal
334 *
335 * @atif: acpi handle
336 *
337 * Execute the QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS ATIF function
338 * to determine the acceptable range of backlight values
339 *
340 * Backlight_caps.caps_valid will be set to true if the query is successful
341 *
342 * The input signals are in range 0-255
343 *
344 * This function assumes the display with backlight is the first LCD
345 *
346 * Returns 0 on success, error on failure.
347 */
amdgpu_atif_query_backlight_caps(struct amdgpu_atif * atif)348 static int amdgpu_atif_query_backlight_caps(struct amdgpu_atif *atif)
349 {
350 union acpi_object *info;
351 struct atif_qbtc_output characteristics;
352 struct atif_qbtc_arguments arguments;
353 struct acpi_buffer params;
354 size_t size;
355 int err = 0;
356
357 arguments.size = sizeof(arguments);
358 arguments.requested_display = ATIF_QBTC_REQUEST_LCD1;
359
360 params.length = sizeof(arguments);
361 params.pointer = (void *)&arguments;
362
363 info = amdgpu_atif_call(atif,
364 ATIF_FUNCTION_QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS,
365 ¶ms);
366 if (!info) {
367 err = -EIO;
368 goto out;
369 }
370
371 size = *(u16 *) info->buffer.pointer;
372 if (size < 10) {
373 err = -EINVAL;
374 goto out;
375 }
376
377 memset(&characteristics, 0, sizeof(characteristics));
378 size = min(sizeof(characteristics), size);
379 memcpy(&characteristics, info->buffer.pointer, size);
380
381 atif->backlight_caps.caps_valid = true;
382 atif->backlight_caps.min_input_signal =
383 characteristics.min_input_signal;
384 atif->backlight_caps.max_input_signal =
385 characteristics.max_input_signal;
386 atif->backlight_caps.ac_level = characteristics.ac_level;
387 atif->backlight_caps.dc_level = characteristics.dc_level;
388 out:
389 kfree(info);
390 return err;
391 }
392
393 /**
394 * amdgpu_atif_get_sbios_requests - get requested sbios event
395 *
396 * @atif: acpi handle
397 * @req: atif sbios request struct
398 *
399 * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function
400 * to determine what requests the sbios is making to the driver
401 * (all asics).
402 * Returns 0 on success, error on failure.
403 */
amdgpu_atif_get_sbios_requests(struct amdgpu_atif * atif,struct atif_sbios_requests * req)404 static int amdgpu_atif_get_sbios_requests(struct amdgpu_atif *atif,
405 struct atif_sbios_requests *req)
406 {
407 union acpi_object *info;
408 size_t size;
409 int count = 0;
410
411 info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS,
412 NULL);
413 if (!info)
414 return -EIO;
415
416 size = *(u16 *)info->buffer.pointer;
417 if (size < 0xd) {
418 count = -EINVAL;
419 goto out;
420 }
421 memset(req, 0, sizeof(*req));
422
423 size = min(sizeof(*req), size);
424 memcpy(req, info->buffer.pointer, size);
425 DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending);
426
427 count = hweight32(req->pending);
428
429 out:
430 kfree(info);
431 return count;
432 }
433
434 /**
435 * amdgpu_atif_handler - handle ATIF notify requests
436 *
437 * @adev: amdgpu_device pointer
438 * @event: atif sbios request struct
439 *
440 * Checks the acpi event and if it matches an atif event,
441 * handles it.
442 *
443 * Returns:
444 * NOTIFY_BAD or NOTIFY_DONE, depending on the event.
445 */
amdgpu_atif_handler(struct amdgpu_device * adev,struct acpi_bus_event * event)446 static int amdgpu_atif_handler(struct amdgpu_device *adev,
447 struct acpi_bus_event *event)
448 {
449 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
450 int count;
451
452 DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n",
453 event->device_class, event->type);
454
455 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
456 return NOTIFY_DONE;
457
458 /* Is this actually our event? */
459 if (!atif->notification_cfg.enabled ||
460 event->type != atif->notification_cfg.command_code) {
461 /* These events will generate keypresses otherwise */
462 if (event->type == ACPI_VIDEO_NOTIFY_PROBE)
463 return NOTIFY_BAD;
464 else
465 return NOTIFY_DONE;
466 }
467
468 if (atif->functions.sbios_requests) {
469 struct atif_sbios_requests req;
470
471 /* Check pending SBIOS requests */
472 count = amdgpu_atif_get_sbios_requests(atif, &req);
473
474 if (count <= 0)
475 return NOTIFY_BAD;
476
477 DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count);
478
479 if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) {
480 if (atif->bd) {
481 DRM_DEBUG_DRIVER("Changing brightness to %d\n",
482 req.backlight_level);
483 /*
484 * XXX backlight_device_set_brightness() is
485 * hardwired to post BACKLIGHT_UPDATE_SYSFS.
486 * It probably should accept 'reason' parameter.
487 */
488 backlight_device_set_brightness(atif->bd, req.backlight_level);
489 }
490 }
491
492 if (req.pending & ATIF_DGPU_DISPLAY_EVENT) {
493 if (adev->flags & AMD_IS_PX) {
494 pm_runtime_get_sync(adev_to_drm(adev)->dev);
495 /* Just fire off a uevent and let userspace tell us what to do */
496 drm_helper_hpd_irq_event(adev_to_drm(adev));
497 pm_runtime_mark_last_busy(adev_to_drm(adev)->dev);
498 pm_runtime_put_autosuspend(adev_to_drm(adev)->dev);
499 }
500 }
501 /* TODO: check other events */
502 }
503
504 /* We've handled the event, stop the notifier chain. The ACPI interface
505 * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to
506 * userspace if the event was generated only to signal a SBIOS
507 * request.
508 */
509 return NOTIFY_BAD;
510 }
511
512 /* Call the ATCS method
513 */
514 /**
515 * amdgpu_atcs_call - call an ATCS method
516 *
517 * @atcs: atcs structure
518 * @function: the ATCS function to execute
519 * @params: ATCS function params
520 *
521 * Executes the requested ATCS function (all asics).
522 * Returns a pointer to the acpi output buffer.
523 */
amdgpu_atcs_call(struct amdgpu_atcs * atcs,int function,struct acpi_buffer * params)524 static union acpi_object *amdgpu_atcs_call(struct amdgpu_atcs *atcs,
525 int function,
526 struct acpi_buffer *params)
527 {
528 acpi_status status;
529 union acpi_object atcs_arg_elements[2];
530 struct acpi_object_list atcs_arg;
531 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
532
533 atcs_arg.count = 2;
534 atcs_arg.pointer = &atcs_arg_elements[0];
535
536 atcs_arg_elements[0].type = ACPI_TYPE_INTEGER;
537 atcs_arg_elements[0].integer.value = function;
538
539 if (params) {
540 atcs_arg_elements[1].type = ACPI_TYPE_BUFFER;
541 atcs_arg_elements[1].buffer.length = params->length;
542 atcs_arg_elements[1].buffer.pointer = params->pointer;
543 } else {
544 /* We need a second fake parameter */
545 atcs_arg_elements[1].type = ACPI_TYPE_INTEGER;
546 atcs_arg_elements[1].integer.value = 0;
547 }
548
549 status = acpi_evaluate_object(atcs->handle, NULL, &atcs_arg, &buffer);
550
551 /* Fail only if calling the method fails and ATIF is supported */
552 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
553 DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n",
554 acpi_format_exception(status));
555 kfree(buffer.pointer);
556 return NULL;
557 }
558
559 return buffer.pointer;
560 }
561
562 /**
563 * amdgpu_atcs_parse_functions - parse supported functions
564 *
565 * @f: supported functions struct
566 * @mask: supported functions mask from ATCS
567 *
568 * Use the supported functions mask from ATCS function
569 * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions
570 * are supported (all asics).
571 */
amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions * f,u32 mask)572 static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mask)
573 {
574 f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED;
575 f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED;
576 f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED;
577 f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED;
578 f->power_shift_control = mask & ATCS_SET_POWER_SHIFT_CONTROL_SUPPORTED;
579 }
580
581 /**
582 * amdgpu_atcs_verify_interface - verify ATCS
583 *
584 * @atcs: amdgpu atcs struct
585 *
586 * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function
587 * to initialize ATCS and determine what features are supported
588 * (all asics).
589 * returns 0 on success, error on failure.
590 */
amdgpu_atcs_verify_interface(struct amdgpu_atcs * atcs)591 static int amdgpu_atcs_verify_interface(struct amdgpu_atcs *atcs)
592 {
593 union acpi_object *info;
594 struct atcs_verify_interface output;
595 size_t size;
596 int err = 0;
597
598 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_VERIFY_INTERFACE, NULL);
599 if (!info)
600 return -EIO;
601
602 memset(&output, 0, sizeof(output));
603
604 size = *(u16 *) info->buffer.pointer;
605 if (size < 8) {
606 DRM_INFO("ATCS buffer is too small: %zu\n", size);
607 err = -EINVAL;
608 goto out;
609 }
610 size = min(sizeof(output), size);
611
612 memcpy(&output, info->buffer.pointer, size);
613
614 /* TODO: check version? */
615 DRM_DEBUG_DRIVER("ATCS version %u\n", output.version);
616
617 amdgpu_atcs_parse_functions(&atcs->functions, output.function_bits);
618
619 out:
620 kfree(info);
621 return err;
622 }
623
624 /**
625 * amdgpu_acpi_is_pcie_performance_request_supported
626 *
627 * @adev: amdgpu_device pointer
628 *
629 * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods
630 * are supported (all asics).
631 * returns true if supported, false if not.
632 */
amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device * adev)633 bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *adev)
634 {
635 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
636
637 if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy)
638 return true;
639
640 return false;
641 }
642
643 /**
644 * amdgpu_acpi_is_power_shift_control_supported
645 *
646 * Check if the ATCS power shift control method
647 * is supported.
648 * returns true if supported, false if not.
649 */
amdgpu_acpi_is_power_shift_control_supported(void)650 bool amdgpu_acpi_is_power_shift_control_supported(void)
651 {
652 return amdgpu_acpi_priv.atcs.functions.power_shift_control;
653 }
654
655 /**
656 * amdgpu_acpi_pcie_notify_device_ready
657 *
658 * @adev: amdgpu_device pointer
659 *
660 * Executes the PCIE_DEVICE_READY_NOTIFICATION method
661 * (all asics).
662 * returns 0 on success, error on failure.
663 */
amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device * adev)664 int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev)
665 {
666 union acpi_object *info;
667 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
668
669 if (!atcs->functions.pcie_dev_rdy)
670 return -EINVAL;
671
672 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL);
673 if (!info)
674 return -EIO;
675
676 kfree(info);
677
678 return 0;
679 }
680
681 /**
682 * amdgpu_acpi_pcie_performance_request
683 *
684 * @adev: amdgpu_device pointer
685 * @perf_req: requested perf level (pcie gen speed)
686 * @advertise: set advertise caps flag if set
687 *
688 * Executes the PCIE_PERFORMANCE_REQUEST method to
689 * change the pcie gen speed (all asics).
690 * returns 0 on success, error on failure.
691 */
amdgpu_acpi_pcie_performance_request(struct amdgpu_device * adev,u8 perf_req,bool advertise)692 int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev,
693 u8 perf_req, bool advertise)
694 {
695 union acpi_object *info;
696 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
697 struct atcs_pref_req_input atcs_input;
698 struct atcs_pref_req_output atcs_output;
699 struct acpi_buffer params;
700 size_t size;
701 u32 retry = 3;
702
703 if (amdgpu_acpi_pcie_notify_device_ready(adev))
704 return -EINVAL;
705
706 if (!atcs->functions.pcie_perf_req)
707 return -EINVAL;
708
709 atcs_input.size = sizeof(struct atcs_pref_req_input);
710 /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
711 atcs_input.client_id = pci_dev_id(adev->pdev);
712 atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK;
713 atcs_input.flags = ATCS_WAIT_FOR_COMPLETION;
714 if (advertise)
715 atcs_input.flags |= ATCS_ADVERTISE_CAPS;
716 atcs_input.req_type = ATCS_PCIE_LINK_SPEED;
717 atcs_input.perf_req = perf_req;
718
719 params.length = sizeof(struct atcs_pref_req_input);
720 params.pointer = &atcs_input;
721
722 while (retry--) {
723 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, ¶ms);
724 if (!info)
725 return -EIO;
726
727 memset(&atcs_output, 0, sizeof(atcs_output));
728
729 size = *(u16 *) info->buffer.pointer;
730 if (size < 3) {
731 DRM_INFO("ATCS buffer is too small: %zu\n", size);
732 kfree(info);
733 return -EINVAL;
734 }
735 size = min(sizeof(atcs_output), size);
736
737 memcpy(&atcs_output, info->buffer.pointer, size);
738
739 kfree(info);
740
741 switch (atcs_output.ret_val) {
742 case ATCS_REQUEST_REFUSED:
743 default:
744 return -EINVAL;
745 case ATCS_REQUEST_COMPLETE:
746 return 0;
747 case ATCS_REQUEST_IN_PROGRESS:
748 udelay(10);
749 break;
750 }
751 }
752
753 return 0;
754 }
755
756 /**
757 * amdgpu_acpi_power_shift_control
758 *
759 * @adev: amdgpu_device pointer
760 * @dev_state: device acpi state
761 * @drv_state: driver state
762 *
763 * Executes the POWER_SHIFT_CONTROL method to
764 * communicate current dGPU device state and
765 * driver state to APU/SBIOS.
766 * returns 0 on success, error on failure.
767 */
amdgpu_acpi_power_shift_control(struct amdgpu_device * adev,u8 dev_state,bool drv_state)768 int amdgpu_acpi_power_shift_control(struct amdgpu_device *adev,
769 u8 dev_state, bool drv_state)
770 {
771 union acpi_object *info;
772 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
773 struct atcs_pwr_shift_input atcs_input;
774 struct acpi_buffer params;
775
776 if (!amdgpu_acpi_is_power_shift_control_supported())
777 return -EINVAL;
778
779 atcs_input.size = sizeof(struct atcs_pwr_shift_input);
780 /* dGPU id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
781 atcs_input.dgpu_id = pci_dev_id(adev->pdev);
782 atcs_input.dev_acpi_state = dev_state;
783 atcs_input.drv_state = drv_state;
784
785 params.length = sizeof(struct atcs_pwr_shift_input);
786 params.pointer = &atcs_input;
787
788 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_POWER_SHIFT_CONTROL, ¶ms);
789 if (!info) {
790 DRM_ERROR("ATCS PSC update failed\n");
791 return -EIO;
792 }
793
794 return 0;
795 }
796
797 /**
798 * amdgpu_acpi_smart_shift_update - update dGPU device state to SBIOS
799 *
800 * @dev: drm_device pointer
801 * @ss_state: current smart shift event
802 *
803 * returns 0 on success,
804 * otherwise return error number.
805 */
amdgpu_acpi_smart_shift_update(struct drm_device * dev,enum amdgpu_ss ss_state)806 int amdgpu_acpi_smart_shift_update(struct drm_device *dev, enum amdgpu_ss ss_state)
807 {
808 struct amdgpu_device *adev = drm_to_adev(dev);
809 int r;
810
811 if (!amdgpu_device_supports_smart_shift(dev))
812 return 0;
813
814 switch (ss_state) {
815 /* SBIOS trigger “stop”, “enable” and “start” at D0, Driver Operational.
816 * SBIOS trigger “stop” at D3, Driver Not Operational.
817 * SBIOS trigger “stop” and “disable” at D0, Driver NOT operational.
818 */
819 case AMDGPU_SS_DRV_LOAD:
820 r = amdgpu_acpi_power_shift_control(adev,
821 AMDGPU_ATCS_PSC_DEV_STATE_D0,
822 AMDGPU_ATCS_PSC_DRV_STATE_OPR);
823 break;
824 case AMDGPU_SS_DEV_D0:
825 r = amdgpu_acpi_power_shift_control(adev,
826 AMDGPU_ATCS_PSC_DEV_STATE_D0,
827 AMDGPU_ATCS_PSC_DRV_STATE_OPR);
828 break;
829 case AMDGPU_SS_DEV_D3:
830 r = amdgpu_acpi_power_shift_control(adev,
831 AMDGPU_ATCS_PSC_DEV_STATE_D3_HOT,
832 AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
833 break;
834 case AMDGPU_SS_DRV_UNLOAD:
835 r = amdgpu_acpi_power_shift_control(adev,
836 AMDGPU_ATCS_PSC_DEV_STATE_D0,
837 AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
838 break;
839 default:
840 return -EINVAL;
841 }
842
843 return r;
844 }
845
846 #ifdef CONFIG_ACPI_NUMA
amdgpu_acpi_get_numa_size(int nid)847 static inline uint64_t amdgpu_acpi_get_numa_size(int nid)
848 {
849 /* This is directly using si_meminfo_node implementation as the
850 * function is not exported.
851 */
852 int zone_type;
853 uint64_t managed_pages = 0;
854
855 pg_data_t *pgdat = NODE_DATA(nid);
856
857 for (zone_type = 0; zone_type < MAX_NR_ZONES; zone_type++)
858 managed_pages +=
859 zone_managed_pages(&pgdat->node_zones[zone_type]);
860 return managed_pages * PAGE_SIZE;
861 }
862
amdgpu_acpi_get_numa_info(uint32_t pxm)863 static struct amdgpu_numa_info *amdgpu_acpi_get_numa_info(uint32_t pxm)
864 {
865 struct amdgpu_numa_info *numa_info;
866 int nid;
867
868 numa_info = xa_load(&numa_info_xa, pxm);
869
870 if (!numa_info) {
871 struct sysinfo info;
872
873 numa_info = kzalloc(sizeof(*numa_info), GFP_KERNEL);
874 if (!numa_info)
875 return NULL;
876
877 nid = pxm_to_node(pxm);
878 numa_info->pxm = pxm;
879 numa_info->nid = nid;
880
881 if (numa_info->nid == NUMA_NO_NODE) {
882 si_meminfo(&info);
883 numa_info->size = info.totalram * info.mem_unit;
884 } else {
885 numa_info->size = amdgpu_acpi_get_numa_size(nid);
886 }
887 xa_store(&numa_info_xa, numa_info->pxm, numa_info, GFP_KERNEL);
888 }
889
890 return numa_info;
891 }
892 #endif
893
894 /**
895 * amdgpu_acpi_get_node_id - obtain the NUMA node id for corresponding amdgpu
896 * acpi device handle
897 *
898 * @handle: acpi handle
899 * @numa_info: amdgpu_numa_info structure holding numa information
900 *
901 * Queries the ACPI interface to fetch the corresponding NUMA Node ID for a
902 * given amdgpu acpi device.
903 *
904 * Returns ACPI STATUS OK with Node ID on success or the corresponding failure reason
905 */
amdgpu_acpi_get_node_id(acpi_handle handle,struct amdgpu_numa_info ** numa_info)906 static acpi_status amdgpu_acpi_get_node_id(acpi_handle handle,
907 struct amdgpu_numa_info **numa_info)
908 {
909 #ifdef CONFIG_ACPI_NUMA
910 u64 pxm;
911 acpi_status status;
912
913 if (!numa_info)
914 return_ACPI_STATUS(AE_ERROR);
915
916 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
917
918 if (ACPI_FAILURE(status))
919 return status;
920
921 *numa_info = amdgpu_acpi_get_numa_info(pxm);
922
923 if (!*numa_info)
924 return_ACPI_STATUS(AE_ERROR);
925
926 return_ACPI_STATUS(AE_OK);
927 #else
928 return_ACPI_STATUS(AE_NOT_EXIST);
929 #endif
930 }
931
amdgpu_acpi_get_dev(u32 sbdf)932 static struct amdgpu_acpi_dev_info *amdgpu_acpi_get_dev(u32 sbdf)
933 {
934 struct amdgpu_acpi_dev_info *acpi_dev;
935
936 if (list_empty(&amdgpu_acpi_dev_list))
937 return NULL;
938
939 list_for_each_entry(acpi_dev, &amdgpu_acpi_dev_list, list)
940 if (acpi_dev->sbdf == sbdf)
941 return acpi_dev;
942
943 return NULL;
944 }
945
amdgpu_acpi_dev_init(struct amdgpu_acpi_dev_info ** dev_info,struct amdgpu_acpi_xcc_info * xcc_info,u32 sbdf)946 static int amdgpu_acpi_dev_init(struct amdgpu_acpi_dev_info **dev_info,
947 struct amdgpu_acpi_xcc_info *xcc_info, u32 sbdf)
948 {
949 struct amdgpu_acpi_dev_info *tmp;
950 union acpi_object *obj;
951 int ret = -ENOENT;
952
953 *dev_info = NULL;
954 tmp = kzalloc(sizeof(struct amdgpu_acpi_dev_info), GFP_KERNEL);
955 if (!tmp)
956 return -ENOMEM;
957
958 INIT_LIST_HEAD(&tmp->xcc_list);
959 INIT_LIST_HEAD(&tmp->list);
960 tmp->sbdf = sbdf;
961
962 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
963 AMD_XCC_DSM_GET_SUPP_MODE, NULL,
964 ACPI_TYPE_INTEGER);
965
966 if (!obj) {
967 acpi_handle_debug(xcc_info->handle,
968 "_DSM function %d evaluation failed",
969 AMD_XCC_DSM_GET_SUPP_MODE);
970 ret = -ENOENT;
971 goto out;
972 }
973
974 tmp->supp_xcp_mode = obj->integer.value & 0xFFFF;
975 ACPI_FREE(obj);
976
977 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
978 AMD_XCC_DSM_GET_XCP_MODE, NULL,
979 ACPI_TYPE_INTEGER);
980
981 if (!obj) {
982 acpi_handle_debug(xcc_info->handle,
983 "_DSM function %d evaluation failed",
984 AMD_XCC_DSM_GET_XCP_MODE);
985 ret = -ENOENT;
986 goto out;
987 }
988
989 tmp->xcp_mode = obj->integer.value & 0xFFFF;
990 tmp->mem_mode = (obj->integer.value >> 32) & 0xFFFF;
991 ACPI_FREE(obj);
992
993 /* Evaluate DSMs and fill XCC information */
994 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
995 AMD_XCC_DSM_GET_TMR_INFO, NULL,
996 ACPI_TYPE_PACKAGE);
997
998 if (!obj || obj->package.count < 2) {
999 acpi_handle_debug(xcc_info->handle,
1000 "_DSM function %d evaluation failed",
1001 AMD_XCC_DSM_GET_TMR_INFO);
1002 ret = -ENOENT;
1003 goto out;
1004 }
1005
1006 tmp->tmr_base = obj->package.elements[0].integer.value;
1007 tmp->tmr_size = obj->package.elements[1].integer.value;
1008 ACPI_FREE(obj);
1009
1010 DRM_DEBUG_DRIVER(
1011 "New dev(%x): Supported xcp mode: %x curr xcp_mode : %x mem mode : %x, tmr base: %llx tmr size: %llx ",
1012 tmp->sbdf, tmp->supp_xcp_mode, tmp->xcp_mode, tmp->mem_mode,
1013 tmp->tmr_base, tmp->tmr_size);
1014 list_add_tail(&tmp->list, &amdgpu_acpi_dev_list);
1015 *dev_info = tmp;
1016
1017 return 0;
1018
1019 out:
1020 if (obj)
1021 ACPI_FREE(obj);
1022 kfree(tmp);
1023
1024 return ret;
1025 }
1026
amdgpu_acpi_get_xcc_info(struct amdgpu_acpi_xcc_info * xcc_info,u32 * sbdf)1027 static int amdgpu_acpi_get_xcc_info(struct amdgpu_acpi_xcc_info *xcc_info,
1028 u32 *sbdf)
1029 {
1030 union acpi_object *obj;
1031 acpi_status status;
1032 int ret = -ENOENT;
1033
1034 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
1035 AMD_XCC_DSM_GET_NUM_FUNCS, NULL,
1036 ACPI_TYPE_INTEGER);
1037
1038 if (!obj || obj->integer.value != AMD_XCC_DSM_NUM_FUNCS)
1039 goto out;
1040 ACPI_FREE(obj);
1041
1042 /* Evaluate DSMs and fill XCC information */
1043 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
1044 AMD_XCC_DSM_GET_VF_XCC_MAPPING, NULL,
1045 ACPI_TYPE_INTEGER);
1046
1047 if (!obj) {
1048 acpi_handle_debug(xcc_info->handle,
1049 "_DSM function %d evaluation failed",
1050 AMD_XCC_DSM_GET_VF_XCC_MAPPING);
1051 ret = -EINVAL;
1052 goto out;
1053 }
1054
1055 /* PF xcc id [39:32] */
1056 xcc_info->phy_id = (obj->integer.value >> 32) & 0xFF;
1057 /* xcp node of this xcc [47:40] */
1058 xcc_info->xcp_node = (obj->integer.value >> 40) & 0xFF;
1059 /* PF domain of this xcc [31:16] */
1060 *sbdf = (obj->integer.value) & 0xFFFF0000;
1061 /* PF bus/dev/fn of this xcc [63:48] */
1062 *sbdf |= (obj->integer.value >> 48) & 0xFFFF;
1063 ACPI_FREE(obj);
1064 obj = NULL;
1065
1066 status =
1067 amdgpu_acpi_get_node_id(xcc_info->handle, &xcc_info->numa_info);
1068
1069 /* TODO: check if this check is required */
1070 if (ACPI_SUCCESS(status))
1071 ret = 0;
1072 out:
1073 if (obj)
1074 ACPI_FREE(obj);
1075
1076 return ret;
1077 }
1078
amdgpu_acpi_enumerate_xcc(void)1079 static int amdgpu_acpi_enumerate_xcc(void)
1080 {
1081 struct amdgpu_acpi_dev_info *dev_info = NULL;
1082 struct amdgpu_acpi_xcc_info *xcc_info;
1083 struct acpi_device *acpi_dev;
1084 char hid[ACPI_ID_LEN];
1085 int ret, id;
1086 u32 sbdf;
1087
1088 INIT_LIST_HEAD(&amdgpu_acpi_dev_list);
1089 xa_init(&numa_info_xa);
1090
1091 for (id = 0; id < AMD_XCC_MAX_HID; id++) {
1092 sprintf(hid, "%s%d", "AMD", AMD_XCC_HID_START + id);
1093 acpi_dev = acpi_dev_get_first_match_dev(hid, NULL, -1);
1094 /* These ACPI objects are expected to be in sequential order. If
1095 * one is not found, no need to check the rest.
1096 */
1097 if (!acpi_dev) {
1098 DRM_DEBUG_DRIVER("No matching acpi device found for %s",
1099 hid);
1100 break;
1101 }
1102
1103 xcc_info = kzalloc(sizeof(struct amdgpu_acpi_xcc_info),
1104 GFP_KERNEL);
1105 if (!xcc_info) {
1106 DRM_ERROR("Failed to allocate memory for xcc info\n");
1107 return -ENOMEM;
1108 }
1109
1110 INIT_LIST_HEAD(&xcc_info->list);
1111 xcc_info->handle = acpi_device_handle(acpi_dev);
1112 acpi_dev_put(acpi_dev);
1113
1114 ret = amdgpu_acpi_get_xcc_info(xcc_info, &sbdf);
1115 if (ret) {
1116 kfree(xcc_info);
1117 continue;
1118 }
1119
1120 dev_info = amdgpu_acpi_get_dev(sbdf);
1121
1122 if (!dev_info)
1123 ret = amdgpu_acpi_dev_init(&dev_info, xcc_info, sbdf);
1124
1125 if (ret == -ENOMEM)
1126 return ret;
1127
1128 if (!dev_info) {
1129 kfree(xcc_info);
1130 continue;
1131 }
1132
1133 list_add_tail(&xcc_info->list, &dev_info->xcc_list);
1134 }
1135
1136 return 0;
1137 }
1138
amdgpu_acpi_get_tmr_info(struct amdgpu_device * adev,u64 * tmr_offset,u64 * tmr_size)1139 int amdgpu_acpi_get_tmr_info(struct amdgpu_device *adev, u64 *tmr_offset,
1140 u64 *tmr_size)
1141 {
1142 struct amdgpu_acpi_dev_info *dev_info;
1143 u32 sbdf;
1144
1145 if (!tmr_offset || !tmr_size)
1146 return -EINVAL;
1147
1148 sbdf = (pci_domain_nr(adev->pdev->bus) << 16);
1149 sbdf |= pci_dev_id(adev->pdev);
1150 dev_info = amdgpu_acpi_get_dev(sbdf);
1151 if (!dev_info)
1152 return -ENOENT;
1153
1154 *tmr_offset = dev_info->tmr_base;
1155 *tmr_size = dev_info->tmr_size;
1156
1157 return 0;
1158 }
1159
amdgpu_acpi_get_mem_info(struct amdgpu_device * adev,int xcc_id,struct amdgpu_numa_info * numa_info)1160 int amdgpu_acpi_get_mem_info(struct amdgpu_device *adev, int xcc_id,
1161 struct amdgpu_numa_info *numa_info)
1162 {
1163 struct amdgpu_acpi_dev_info *dev_info;
1164 struct amdgpu_acpi_xcc_info *xcc_info;
1165 u32 sbdf;
1166
1167 if (!numa_info)
1168 return -EINVAL;
1169
1170 sbdf = (pci_domain_nr(adev->pdev->bus) << 16);
1171 sbdf |= pci_dev_id(adev->pdev);
1172 dev_info = amdgpu_acpi_get_dev(sbdf);
1173 if (!dev_info)
1174 return -ENOENT;
1175
1176 list_for_each_entry(xcc_info, &dev_info->xcc_list, list) {
1177 if (xcc_info->phy_id == xcc_id) {
1178 memcpy(numa_info, xcc_info->numa_info,
1179 sizeof(*numa_info));
1180 return 0;
1181 }
1182 }
1183
1184 return -ENOENT;
1185 }
1186
1187 /**
1188 * amdgpu_acpi_event - handle notify events
1189 *
1190 * @nb: notifier block
1191 * @val: val
1192 * @data: acpi event
1193 *
1194 * Calls relevant amdgpu functions in response to various
1195 * acpi events.
1196 * Returns NOTIFY code
1197 */
amdgpu_acpi_event(struct notifier_block * nb,unsigned long val,void * data)1198 static int amdgpu_acpi_event(struct notifier_block *nb,
1199 unsigned long val,
1200 void *data)
1201 {
1202 struct amdgpu_device *adev = container_of(nb, struct amdgpu_device, acpi_nb);
1203 struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
1204
1205 if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
1206 if (power_supply_is_system_supplied() > 0)
1207 DRM_DEBUG_DRIVER("pm: AC\n");
1208 else
1209 DRM_DEBUG_DRIVER("pm: DC\n");
1210
1211 amdgpu_pm_acpi_event_handler(adev);
1212 }
1213
1214 /* Check for pending SBIOS requests */
1215 return amdgpu_atif_handler(adev, entry);
1216 }
1217
1218 /* Call all ACPI methods here */
1219 /**
1220 * amdgpu_acpi_init - init driver acpi support
1221 *
1222 * @adev: amdgpu_device pointer
1223 *
1224 * Verifies the AMD ACPI interfaces and registers with the acpi
1225 * notifier chain (all asics).
1226 * Returns 0 on success, error on failure.
1227 */
amdgpu_acpi_init(struct amdgpu_device * adev)1228 int amdgpu_acpi_init(struct amdgpu_device *adev)
1229 {
1230 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1231
1232 if (atif->notifications.brightness_change) {
1233 if (adev->dc_enabled) {
1234 #if defined(CONFIG_DRM_AMD_DC)
1235 struct amdgpu_display_manager *dm = &adev->dm;
1236
1237 if (dm->backlight_dev[0])
1238 atif->bd = dm->backlight_dev[0];
1239 #endif
1240 } else {
1241 struct drm_encoder *tmp;
1242
1243 /* Find the encoder controlling the brightness */
1244 list_for_each_entry(tmp, &adev_to_drm(adev)->mode_config.encoder_list,
1245 head) {
1246 struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp);
1247
1248 if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
1249 enc->enc_priv) {
1250 struct amdgpu_encoder_atom_dig *dig = enc->enc_priv;
1251
1252 if (dig->bl_dev) {
1253 atif->bd = dig->bl_dev;
1254 break;
1255 }
1256 }
1257 }
1258 }
1259 }
1260 adev->acpi_nb.notifier_call = amdgpu_acpi_event;
1261 register_acpi_notifier(&adev->acpi_nb);
1262
1263 return 0;
1264 }
1265
amdgpu_acpi_get_backlight_caps(struct amdgpu_dm_backlight_caps * caps)1266 void amdgpu_acpi_get_backlight_caps(struct amdgpu_dm_backlight_caps *caps)
1267 {
1268 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1269
1270 caps->caps_valid = atif->backlight_caps.caps_valid;
1271 caps->min_input_signal = atif->backlight_caps.min_input_signal;
1272 caps->max_input_signal = atif->backlight_caps.max_input_signal;
1273 caps->ac_level = atif->backlight_caps.ac_level;
1274 caps->dc_level = atif->backlight_caps.dc_level;
1275 }
1276
1277 /**
1278 * amdgpu_acpi_fini - tear down driver acpi support
1279 *
1280 * @adev: amdgpu_device pointer
1281 *
1282 * Unregisters with the acpi notifier chain (all asics).
1283 */
amdgpu_acpi_fini(struct amdgpu_device * adev)1284 void amdgpu_acpi_fini(struct amdgpu_device *adev)
1285 {
1286 unregister_acpi_notifier(&adev->acpi_nb);
1287 }
1288
1289 /**
1290 * amdgpu_atif_pci_probe_handle - look up the ATIF handle
1291 *
1292 * @pdev: pci device
1293 *
1294 * Look up the ATIF handles (all asics).
1295 * Returns true if the handle is found, false if not.
1296 */
amdgpu_atif_pci_probe_handle(struct pci_dev * pdev)1297 static bool amdgpu_atif_pci_probe_handle(struct pci_dev *pdev)
1298 {
1299 char acpi_method_name[255] = { 0 };
1300 struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
1301 acpi_handle dhandle, atif_handle;
1302 acpi_status status;
1303 int ret;
1304
1305 dhandle = ACPI_HANDLE(&pdev->dev);
1306 if (!dhandle)
1307 return false;
1308
1309 status = acpi_get_handle(dhandle, "ATIF", &atif_handle);
1310 if (ACPI_FAILURE(status))
1311 return false;
1312
1313 amdgpu_acpi_priv.atif.handle = atif_handle;
1314 acpi_get_name(amdgpu_acpi_priv.atif.handle, ACPI_FULL_PATHNAME, &buffer);
1315 DRM_DEBUG_DRIVER("Found ATIF handle %s\n", acpi_method_name);
1316 ret = amdgpu_atif_verify_interface(&amdgpu_acpi_priv.atif);
1317 if (ret) {
1318 amdgpu_acpi_priv.atif.handle = 0;
1319 return false;
1320 }
1321 return true;
1322 }
1323
1324 /**
1325 * amdgpu_atcs_pci_probe_handle - look up the ATCS handle
1326 *
1327 * @pdev: pci device
1328 *
1329 * Look up the ATCS handles (all asics).
1330 * Returns true if the handle is found, false if not.
1331 */
amdgpu_atcs_pci_probe_handle(struct pci_dev * pdev)1332 static bool amdgpu_atcs_pci_probe_handle(struct pci_dev *pdev)
1333 {
1334 char acpi_method_name[255] = { 0 };
1335 struct acpi_buffer buffer = { sizeof(acpi_method_name), acpi_method_name };
1336 acpi_handle dhandle, atcs_handle;
1337 acpi_status status;
1338 int ret;
1339
1340 dhandle = ACPI_HANDLE(&pdev->dev);
1341 if (!dhandle)
1342 return false;
1343
1344 status = acpi_get_handle(dhandle, "ATCS", &atcs_handle);
1345 if (ACPI_FAILURE(status))
1346 return false;
1347
1348 amdgpu_acpi_priv.atcs.handle = atcs_handle;
1349 acpi_get_name(amdgpu_acpi_priv.atcs.handle, ACPI_FULL_PATHNAME, &buffer);
1350 DRM_DEBUG_DRIVER("Found ATCS handle %s\n", acpi_method_name);
1351 ret = amdgpu_atcs_verify_interface(&amdgpu_acpi_priv.atcs);
1352 if (ret) {
1353 amdgpu_acpi_priv.atcs.handle = 0;
1354 return false;
1355 }
1356 return true;
1357 }
1358
1359
1360 /**
1361 * amdgpu_acpi_should_gpu_reset
1362 *
1363 * @adev: amdgpu_device_pointer
1364 *
1365 * returns true if should reset GPU, false if not
1366 */
amdgpu_acpi_should_gpu_reset(struct amdgpu_device * adev)1367 bool amdgpu_acpi_should_gpu_reset(struct amdgpu_device *adev)
1368 {
1369 if ((adev->flags & AMD_IS_APU) &&
1370 adev->gfx.imu.funcs) /* Not need to do mode2 reset for IMU enabled APUs */
1371 return false;
1372
1373 if ((adev->flags & AMD_IS_APU) &&
1374 amdgpu_acpi_is_s3_active(adev))
1375 return false;
1376
1377 if (amdgpu_sriov_vf(adev))
1378 return false;
1379
1380 #if IS_ENABLED(CONFIG_SUSPEND)
1381 return pm_suspend_target_state != PM_SUSPEND_TO_IDLE;
1382 #else
1383 return true;
1384 #endif
1385 }
1386
1387 /*
1388 * amdgpu_acpi_detect - detect ACPI ATIF/ATCS methods
1389 *
1390 * Check if we have the ATIF/ATCS methods and populate
1391 * the structures in the driver.
1392 */
amdgpu_acpi_detect(void)1393 void amdgpu_acpi_detect(void)
1394 {
1395 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1396 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
1397 struct pci_dev *pdev = NULL;
1398 int ret;
1399
1400 while ((pdev = pci_get_base_class(PCI_BASE_CLASS_DISPLAY, pdev))) {
1401 if ((pdev->class != PCI_CLASS_DISPLAY_VGA << 8) &&
1402 (pdev->class != PCI_CLASS_DISPLAY_OTHER << 8))
1403 continue;
1404
1405 if (!atif->handle)
1406 amdgpu_atif_pci_probe_handle(pdev);
1407 if (!atcs->handle)
1408 amdgpu_atcs_pci_probe_handle(pdev);
1409 }
1410
1411 if (atif->functions.sbios_requests && !atif->functions.system_params) {
1412 /* XXX check this workraround, if sbios request function is
1413 * present we have to see how it's configured in the system
1414 * params
1415 */
1416 atif->functions.system_params = true;
1417 }
1418
1419 if (atif->functions.system_params) {
1420 ret = amdgpu_atif_get_notification_params(atif);
1421 if (ret) {
1422 DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n",
1423 ret);
1424 /* Disable notification */
1425 atif->notification_cfg.enabled = false;
1426 }
1427 }
1428
1429 if (atif->functions.query_backlight_transfer_characteristics) {
1430 ret = amdgpu_atif_query_backlight_caps(atif);
1431 if (ret) {
1432 DRM_DEBUG_DRIVER("Call to QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS failed: %d\n",
1433 ret);
1434 atif->backlight_caps.caps_valid = false;
1435 }
1436 } else {
1437 atif->backlight_caps.caps_valid = false;
1438 }
1439
1440 amdgpu_acpi_enumerate_xcc();
1441 }
1442
amdgpu_acpi_release(void)1443 void amdgpu_acpi_release(void)
1444 {
1445 struct amdgpu_acpi_dev_info *dev_info, *dev_tmp;
1446 struct amdgpu_acpi_xcc_info *xcc_info, *xcc_tmp;
1447 struct amdgpu_numa_info *numa_info;
1448 unsigned long index;
1449
1450 xa_for_each(&numa_info_xa, index, numa_info) {
1451 kfree(numa_info);
1452 xa_erase(&numa_info_xa, index);
1453 }
1454
1455 if (list_empty(&amdgpu_acpi_dev_list))
1456 return;
1457
1458 list_for_each_entry_safe(dev_info, dev_tmp, &amdgpu_acpi_dev_list,
1459 list) {
1460 list_for_each_entry_safe(xcc_info, xcc_tmp, &dev_info->xcc_list,
1461 list) {
1462 list_del(&xcc_info->list);
1463 kfree(xcc_info);
1464 }
1465
1466 list_del(&dev_info->list);
1467 kfree(dev_info);
1468 }
1469 }
1470
1471 #if IS_ENABLED(CONFIG_SUSPEND)
1472 /**
1473 * amdgpu_acpi_is_s3_active
1474 *
1475 * @adev: amdgpu_device_pointer
1476 *
1477 * returns true if supported, false if not.
1478 */
amdgpu_acpi_is_s3_active(struct amdgpu_device * adev)1479 bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev)
1480 {
1481 return !(adev->flags & AMD_IS_APU) ||
1482 (pm_suspend_target_state == PM_SUSPEND_MEM);
1483 }
1484
1485 /**
1486 * amdgpu_acpi_is_s0ix_active
1487 *
1488 * @adev: amdgpu_device_pointer
1489 *
1490 * returns true if supported, false if not.
1491 */
amdgpu_acpi_is_s0ix_active(struct amdgpu_device * adev)1492 bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev)
1493 {
1494 if (!(adev->flags & AMD_IS_APU) ||
1495 (pm_suspend_target_state != PM_SUSPEND_TO_IDLE))
1496 return false;
1497
1498 if (adev->asic_type < CHIP_RAVEN)
1499 return false;
1500
1501 if (!(adev->pm.pp_feature & PP_GFXOFF_MASK))
1502 return false;
1503
1504 /*
1505 * If ACPI_FADT_LOW_POWER_S0 is not set in the FADT, it is generally
1506 * risky to do any special firmware-related preparations for entering
1507 * S0ix even though the system is suspending to idle, so return false
1508 * in that case.
1509 */
1510 if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) {
1511 dev_err_once(adev->dev,
1512 "Power consumption will be higher as BIOS has not been configured for suspend-to-idle.\n"
1513 "To use suspend-to-idle change the sleep mode in BIOS setup.\n");
1514 return false;
1515 }
1516
1517 #if !IS_ENABLED(CONFIG_AMD_PMC)
1518 dev_err_once(adev->dev,
1519 "Power consumption will be higher as the kernel has not been compiled with CONFIG_AMD_PMC.\n");
1520 return false;
1521 #else
1522 return true;
1523 #endif /* CONFIG_AMD_PMC */
1524 }
1525
1526 /**
1527 * amdgpu_choose_low_power_state
1528 *
1529 * @adev: amdgpu_device_pointer
1530 *
1531 * Choose the target low power state for the GPU
1532 */
amdgpu_choose_low_power_state(struct amdgpu_device * adev)1533 void amdgpu_choose_low_power_state(struct amdgpu_device *adev)
1534 {
1535 if (adev->in_runpm)
1536 return;
1537
1538 if (amdgpu_acpi_is_s0ix_active(adev))
1539 adev->in_s0ix = true;
1540 else if (amdgpu_acpi_is_s3_active(adev))
1541 adev->in_s3 = true;
1542 }
1543
1544 #endif /* CONFIG_SUSPEND */
1545