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 uint16_t bdf;
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 *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 */
amdgpu_atif_parse_notification(struct amdgpu_atif_notifications * n,u32 mask)203 static 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 */
amdgpu_atif_parse_functions(struct amdgpu_atif_functions * f,u32 mask)223 static 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 */
amdgpu_atif_verify_interface(struct amdgpu_atif * atif)244 static 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
273 out:
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 */
amdgpu_atif_get_notification_params(struct amdgpu_atif * atif)289 static 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
333 out:
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 */
amdgpu_atif_query_backlight_caps(struct amdgpu_atif * atif)357 static 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 out:
396 kfree(info);
397 return err;
398 }
399
400 /**
401 * amdgpu_atif_get_sbios_requests - get requested sbios event
402 *
403 * @atif: acpi handle
404 * @req: atif sbios request struct
405 *
406 * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function
407 * to determine what requests the sbios is making to the driver
408 * (all asics).
409 * Returns 0 on success, error on failure.
410 */
amdgpu_atif_get_sbios_requests(struct amdgpu_atif * atif,struct atif_sbios_requests * req)411 static int amdgpu_atif_get_sbios_requests(struct amdgpu_atif *atif,
412 struct atif_sbios_requests *req)
413 {
414 union acpi_object *info;
415 size_t size;
416 int count = 0;
417
418 info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS,
419 NULL);
420 if (!info)
421 return -EIO;
422
423 size = *(u16 *)info->buffer.pointer;
424 if (size < 0xd) {
425 count = -EINVAL;
426 goto out;
427 }
428 memset(req, 0, sizeof(*req));
429
430 size = min(sizeof(*req), size);
431 memcpy(req, info->buffer.pointer, size);
432 DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending);
433
434 count = hweight32(req->pending);
435
436 out:
437 kfree(info);
438 return count;
439 }
440
441 /**
442 * amdgpu_atif_handler - handle ATIF notify requests
443 *
444 * @adev: amdgpu_device pointer
445 * @event: atif sbios request struct
446 *
447 * Checks the acpi event and if it matches an atif event,
448 * handles it.
449 *
450 * Returns:
451 * NOTIFY_BAD or NOTIFY_DONE, depending on the event.
452 */
amdgpu_atif_handler(struct amdgpu_device * adev,struct acpi_bus_event * event)453 static int amdgpu_atif_handler(struct amdgpu_device *adev,
454 struct acpi_bus_event *event)
455 {
456 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
457 int count;
458
459 DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n",
460 event->device_class, event->type);
461
462 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
463 return NOTIFY_DONE;
464
465 /* Is this actually our event? */
466 if (!atif->notification_cfg.enabled ||
467 event->type != atif->notification_cfg.command_code) {
468 /* These events will generate keypresses otherwise */
469 if (event->type == ACPI_VIDEO_NOTIFY_PROBE)
470 return NOTIFY_BAD;
471 else
472 return NOTIFY_DONE;
473 }
474
475 if (atif->functions.sbios_requests) {
476 struct atif_sbios_requests req;
477
478 /* Check pending SBIOS requests */
479 count = amdgpu_atif_get_sbios_requests(atif, &req);
480
481 if (count <= 0)
482 return NOTIFY_BAD;
483
484 DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count);
485
486 if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) {
487 if (atif->bd) {
488 DRM_DEBUG_DRIVER("Changing brightness to %d\n",
489 req.backlight_level);
490 /*
491 * XXX backlight_device_set_brightness() is
492 * hardwired to post BACKLIGHT_UPDATE_SYSFS.
493 * It probably should accept 'reason' parameter.
494 */
495 backlight_device_set_brightness(atif->bd, req.backlight_level);
496 }
497 }
498
499 if (req.pending & ATIF_DGPU_DISPLAY_EVENT) {
500 if (adev->flags & AMD_IS_PX) {
501 pm_runtime_get_sync(adev_to_drm(adev)->dev);
502 /* Just fire off a uevent and let userspace tell us what to do */
503 drm_helper_hpd_irq_event(adev_to_drm(adev));
504 pm_runtime_mark_last_busy(adev_to_drm(adev)->dev);
505 pm_runtime_put_autosuspend(adev_to_drm(adev)->dev);
506 }
507 }
508 /* TODO: check other events */
509 }
510
511 /* We've handled the event, stop the notifier chain. The ACPI interface
512 * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to
513 * userspace if the event was generated only to signal a SBIOS
514 * request.
515 */
516 return NOTIFY_BAD;
517 }
518
519 /* Call the ATCS method
520 */
521 /**
522 * amdgpu_atcs_call - call an ATCS method
523 *
524 * @atcs: atcs structure
525 * @function: the ATCS function to execute
526 * @params: ATCS function params
527 *
528 * Executes the requested ATCS function (all asics).
529 * Returns a pointer to the acpi output buffer.
530 */
amdgpu_atcs_call(struct amdgpu_atcs * atcs,int function,struct acpi_buffer * params)531 static union acpi_object *amdgpu_atcs_call(struct amdgpu_atcs *atcs,
532 int function,
533 struct acpi_buffer *params)
534 {
535 acpi_status status;
536 union acpi_object atcs_arg_elements[2];
537 struct acpi_object_list atcs_arg;
538 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
539
540 atcs_arg.count = 2;
541 atcs_arg.pointer = &atcs_arg_elements[0];
542
543 atcs_arg_elements[0].type = ACPI_TYPE_INTEGER;
544 atcs_arg_elements[0].integer.value = function;
545
546 if (params) {
547 atcs_arg_elements[1].type = ACPI_TYPE_BUFFER;
548 atcs_arg_elements[1].buffer.length = params->length;
549 atcs_arg_elements[1].buffer.pointer = params->pointer;
550 } else {
551 /* We need a second fake parameter */
552 atcs_arg_elements[1].type = ACPI_TYPE_INTEGER;
553 atcs_arg_elements[1].integer.value = 0;
554 }
555
556 status = acpi_evaluate_object(atcs->handle, NULL, &atcs_arg, &buffer);
557
558 /* Fail only if calling the method fails and ATIF is supported */
559 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
560 DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n",
561 acpi_format_exception(status));
562 kfree(buffer.pointer);
563 return NULL;
564 }
565
566 return buffer.pointer;
567 }
568
569 /**
570 * amdgpu_atcs_parse_functions - parse supported functions
571 *
572 * @f: supported functions struct
573 * @mask: supported functions mask from ATCS
574 *
575 * Use the supported functions mask from ATCS function
576 * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions
577 * are supported (all asics).
578 */
amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions * f,u32 mask)579 static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mask)
580 {
581 f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED;
582 f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED;
583 f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED;
584 f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED;
585 f->power_shift_control = mask & ATCS_SET_POWER_SHIFT_CONTROL_SUPPORTED;
586 }
587
588 /**
589 * amdgpu_atcs_verify_interface - verify ATCS
590 *
591 * @atcs: amdgpu atcs struct
592 *
593 * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function
594 * to initialize ATCS and determine what features are supported
595 * (all asics).
596 * returns 0 on success, error on failure.
597 */
amdgpu_atcs_verify_interface(struct amdgpu_atcs * atcs)598 static int amdgpu_atcs_verify_interface(struct amdgpu_atcs *atcs)
599 {
600 union acpi_object *info;
601 struct atcs_verify_interface output;
602 size_t size;
603 int err = 0;
604
605 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_VERIFY_INTERFACE, NULL);
606 if (!info)
607 return -EIO;
608
609 memset(&output, 0, sizeof(output));
610
611 size = *(u16 *) info->buffer.pointer;
612 if (size < 8) {
613 DRM_INFO("ATCS buffer is too small: %zu\n", size);
614 err = -EINVAL;
615 goto out;
616 }
617 size = min(sizeof(output), size);
618
619 memcpy(&output, info->buffer.pointer, size);
620
621 /* TODO: check version? */
622 DRM_DEBUG_DRIVER("ATCS version %u\n", output.version);
623
624 amdgpu_atcs_parse_functions(&atcs->functions, output.function_bits);
625
626 out:
627 kfree(info);
628 return err;
629 }
630
631 /**
632 * amdgpu_acpi_is_pcie_performance_request_supported
633 *
634 * @adev: amdgpu_device pointer
635 *
636 * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods
637 * are supported (all asics).
638 * returns true if supported, false if not.
639 */
amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device * adev)640 bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *adev)
641 {
642 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
643
644 if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy)
645 return true;
646
647 return false;
648 }
649
650 /**
651 * amdgpu_acpi_is_power_shift_control_supported
652 *
653 * Check if the ATCS power shift control method
654 * is supported.
655 * returns true if supported, false if not.
656 */
amdgpu_acpi_is_power_shift_control_supported(void)657 bool amdgpu_acpi_is_power_shift_control_supported(void)
658 {
659 return amdgpu_acpi_priv.atcs.functions.power_shift_control;
660 }
661
662 /**
663 * amdgpu_acpi_pcie_notify_device_ready
664 *
665 * @adev: amdgpu_device pointer
666 *
667 * Executes the PCIE_DEVICE_READY_NOTIFICATION method
668 * (all asics).
669 * returns 0 on success, error on failure.
670 */
amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device * adev)671 int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev)
672 {
673 union acpi_object *info;
674 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
675
676 if (!atcs->functions.pcie_dev_rdy)
677 return -EINVAL;
678
679 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL);
680 if (!info)
681 return -EIO;
682
683 kfree(info);
684
685 return 0;
686 }
687
688 /**
689 * amdgpu_acpi_pcie_performance_request
690 *
691 * @adev: amdgpu_device pointer
692 * @perf_req: requested perf level (pcie gen speed)
693 * @advertise: set advertise caps flag if set
694 *
695 * Executes the PCIE_PERFORMANCE_REQUEST method to
696 * change the pcie gen speed (all asics).
697 * returns 0 on success, error on failure.
698 */
amdgpu_acpi_pcie_performance_request(struct amdgpu_device * adev,u8 perf_req,bool advertise)699 int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev,
700 u8 perf_req, bool advertise)
701 {
702 union acpi_object *info;
703 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
704 struct atcs_pref_req_input atcs_input;
705 struct atcs_pref_req_output atcs_output;
706 struct acpi_buffer params;
707 size_t size;
708 u32 retry = 3;
709
710 if (amdgpu_acpi_pcie_notify_device_ready(adev))
711 return -EINVAL;
712
713 if (!atcs->functions.pcie_perf_req)
714 return -EINVAL;
715
716 atcs_input.size = sizeof(struct atcs_pref_req_input);
717 /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
718 atcs_input.client_id = pci_dev_id(adev->pdev);
719 atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK;
720 atcs_input.flags = ATCS_WAIT_FOR_COMPLETION;
721 if (advertise)
722 atcs_input.flags |= ATCS_ADVERTISE_CAPS;
723 atcs_input.req_type = ATCS_PCIE_LINK_SPEED;
724 atcs_input.perf_req = perf_req;
725
726 params.length = sizeof(struct atcs_pref_req_input);
727 params.pointer = &atcs_input;
728
729 while (retry--) {
730 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, ¶ms);
731 if (!info)
732 return -EIO;
733
734 memset(&atcs_output, 0, sizeof(atcs_output));
735
736 size = *(u16 *) info->buffer.pointer;
737 if (size < 3) {
738 DRM_INFO("ATCS buffer is too small: %zu\n", size);
739 kfree(info);
740 return -EINVAL;
741 }
742 size = min(sizeof(atcs_output), size);
743
744 memcpy(&atcs_output, info->buffer.pointer, size);
745
746 kfree(info);
747
748 switch (atcs_output.ret_val) {
749 case ATCS_REQUEST_REFUSED:
750 default:
751 return -EINVAL;
752 case ATCS_REQUEST_COMPLETE:
753 return 0;
754 case ATCS_REQUEST_IN_PROGRESS:
755 udelay(10);
756 break;
757 }
758 }
759
760 return 0;
761 }
762
763 /**
764 * amdgpu_acpi_power_shift_control
765 *
766 * @adev: amdgpu_device pointer
767 * @dev_state: device acpi state
768 * @drv_state: driver state
769 *
770 * Executes the POWER_SHIFT_CONTROL method to
771 * communicate current dGPU device state and
772 * driver state to APU/SBIOS.
773 * returns 0 on success, error on failure.
774 */
amdgpu_acpi_power_shift_control(struct amdgpu_device * adev,u8 dev_state,bool drv_state)775 int amdgpu_acpi_power_shift_control(struct amdgpu_device *adev,
776 u8 dev_state, bool drv_state)
777 {
778 union acpi_object *info;
779 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
780 struct atcs_pwr_shift_input atcs_input;
781 struct acpi_buffer params;
782
783 if (!amdgpu_acpi_is_power_shift_control_supported())
784 return -EINVAL;
785
786 atcs_input.size = sizeof(struct atcs_pwr_shift_input);
787 /* dGPU id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
788 atcs_input.dgpu_id = pci_dev_id(adev->pdev);
789 atcs_input.dev_acpi_state = dev_state;
790 atcs_input.drv_state = drv_state;
791
792 params.length = sizeof(struct atcs_pwr_shift_input);
793 params.pointer = &atcs_input;
794
795 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_POWER_SHIFT_CONTROL, ¶ms);
796 if (!info) {
797 DRM_ERROR("ATCS PSC update failed\n");
798 return -EIO;
799 }
800
801 return 0;
802 }
803
804 /**
805 * amdgpu_acpi_smart_shift_update - update dGPU device state to SBIOS
806 *
807 * @dev: drm_device pointer
808 * @ss_state: current smart shift event
809 *
810 * returns 0 on success,
811 * otherwise return error number.
812 */
amdgpu_acpi_smart_shift_update(struct drm_device * dev,enum amdgpu_ss ss_state)813 int amdgpu_acpi_smart_shift_update(struct drm_device *dev, enum amdgpu_ss ss_state)
814 {
815 struct amdgpu_device *adev = drm_to_adev(dev);
816 int r;
817
818 if (!amdgpu_device_supports_smart_shift(dev))
819 return 0;
820
821 switch (ss_state) {
822 /* SBIOS trigger “stop”, “enable” and “start” at D0, Driver Operational.
823 * SBIOS trigger “stop” at D3, Driver Not Operational.
824 * SBIOS trigger “stop” and “disable” at D0, Driver NOT operational.
825 */
826 case AMDGPU_SS_DRV_LOAD:
827 r = amdgpu_acpi_power_shift_control(adev,
828 AMDGPU_ATCS_PSC_DEV_STATE_D0,
829 AMDGPU_ATCS_PSC_DRV_STATE_OPR);
830 break;
831 case AMDGPU_SS_DEV_D0:
832 r = amdgpu_acpi_power_shift_control(adev,
833 AMDGPU_ATCS_PSC_DEV_STATE_D0,
834 AMDGPU_ATCS_PSC_DRV_STATE_OPR);
835 break;
836 case AMDGPU_SS_DEV_D3:
837 r = amdgpu_acpi_power_shift_control(adev,
838 AMDGPU_ATCS_PSC_DEV_STATE_D3_HOT,
839 AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
840 break;
841 case AMDGPU_SS_DRV_UNLOAD:
842 r = amdgpu_acpi_power_shift_control(adev,
843 AMDGPU_ATCS_PSC_DEV_STATE_D0,
844 AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
845 break;
846 default:
847 return -EINVAL;
848 }
849
850 return r;
851 }
852
853 #ifdef CONFIG_ACPI_NUMA
amdgpu_acpi_get_numa_size(int nid)854 static inline uint64_t amdgpu_acpi_get_numa_size(int nid)
855 {
856 /* This is directly using si_meminfo_node implementation as the
857 * function is not exported.
858 */
859 int zone_type;
860 uint64_t managed_pages = 0;
861
862 pg_data_t *pgdat = NODE_DATA(nid);
863
864 for (zone_type = 0; zone_type < MAX_NR_ZONES; zone_type++)
865 managed_pages +=
866 zone_managed_pages(&pgdat->node_zones[zone_type]);
867 return managed_pages * PAGE_SIZE;
868 }
869
amdgpu_acpi_get_numa_info(uint32_t pxm)870 static struct amdgpu_numa_info *amdgpu_acpi_get_numa_info(uint32_t pxm)
871 {
872 struct amdgpu_numa_info *numa_info;
873 int nid;
874
875 numa_info = xa_load(&numa_info_xa, pxm);
876
877 if (!numa_info) {
878 struct sysinfo info;
879
880 numa_info = kzalloc(sizeof(*numa_info), GFP_KERNEL);
881 if (!numa_info)
882 return NULL;
883
884 nid = pxm_to_node(pxm);
885 numa_info->pxm = pxm;
886 numa_info->nid = nid;
887
888 if (numa_info->nid == NUMA_NO_NODE) {
889 si_meminfo(&info);
890 numa_info->size = info.totalram * info.mem_unit;
891 } else {
892 numa_info->size = amdgpu_acpi_get_numa_size(nid);
893 }
894 xa_store(&numa_info_xa, numa_info->pxm, numa_info, GFP_KERNEL);
895 }
896
897 return numa_info;
898 }
899 #endif
900
901 /**
902 * amdgpu_acpi_get_node_id - obtain the NUMA node id for corresponding amdgpu
903 * acpi device handle
904 *
905 * @handle: acpi handle
906 * @numa_info: amdgpu_numa_info structure holding numa information
907 *
908 * Queries the ACPI interface to fetch the corresponding NUMA Node ID for a
909 * given amdgpu acpi device.
910 *
911 * Returns ACPI STATUS OK with Node ID on success or the corresponding failure reason
912 */
amdgpu_acpi_get_node_id(acpi_handle handle,struct amdgpu_numa_info ** numa_info)913 static acpi_status amdgpu_acpi_get_node_id(acpi_handle handle,
914 struct amdgpu_numa_info **numa_info)
915 {
916 #ifdef CONFIG_ACPI_NUMA
917 u64 pxm;
918 acpi_status status;
919
920 if (!numa_info)
921 return_ACPI_STATUS(AE_ERROR);
922
923 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
924
925 if (ACPI_FAILURE(status))
926 return status;
927
928 *numa_info = amdgpu_acpi_get_numa_info(pxm);
929
930 if (!*numa_info)
931 return_ACPI_STATUS(AE_ERROR);
932
933 return_ACPI_STATUS(AE_OK);
934 #else
935 return_ACPI_STATUS(AE_NOT_EXIST);
936 #endif
937 }
938
amdgpu_acpi_get_dev(u16 bdf)939 static struct amdgpu_acpi_dev_info *amdgpu_acpi_get_dev(u16 bdf)
940 {
941 struct amdgpu_acpi_dev_info *acpi_dev;
942
943 if (list_empty(&amdgpu_acpi_dev_list))
944 return NULL;
945
946 list_for_each_entry(acpi_dev, &amdgpu_acpi_dev_list, list)
947 if (acpi_dev->bdf == bdf)
948 return acpi_dev;
949
950 return NULL;
951 }
952
amdgpu_acpi_dev_init(struct amdgpu_acpi_dev_info ** dev_info,struct amdgpu_acpi_xcc_info * xcc_info,u16 bdf)953 static int amdgpu_acpi_dev_init(struct amdgpu_acpi_dev_info **dev_info,
954 struct amdgpu_acpi_xcc_info *xcc_info, u16 bdf)
955 {
956 struct amdgpu_acpi_dev_info *tmp;
957 union acpi_object *obj;
958 int ret = -ENOENT;
959
960 *dev_info = NULL;
961 tmp = kzalloc(sizeof(struct amdgpu_acpi_dev_info), GFP_KERNEL);
962 if (!tmp)
963 return -ENOMEM;
964
965 INIT_LIST_HEAD(&tmp->xcc_list);
966 INIT_LIST_HEAD(&tmp->list);
967 tmp->bdf = bdf;
968
969 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
970 AMD_XCC_DSM_GET_SUPP_MODE, NULL,
971 ACPI_TYPE_INTEGER);
972
973 if (!obj) {
974 acpi_handle_debug(xcc_info->handle,
975 "_DSM function %d evaluation failed",
976 AMD_XCC_DSM_GET_SUPP_MODE);
977 ret = -ENOENT;
978 goto out;
979 }
980
981 tmp->supp_xcp_mode = obj->integer.value & 0xFFFF;
982 ACPI_FREE(obj);
983
984 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
985 AMD_XCC_DSM_GET_XCP_MODE, NULL,
986 ACPI_TYPE_INTEGER);
987
988 if (!obj) {
989 acpi_handle_debug(xcc_info->handle,
990 "_DSM function %d evaluation failed",
991 AMD_XCC_DSM_GET_XCP_MODE);
992 ret = -ENOENT;
993 goto out;
994 }
995
996 tmp->xcp_mode = obj->integer.value & 0xFFFF;
997 tmp->mem_mode = (obj->integer.value >> 32) & 0xFFFF;
998 ACPI_FREE(obj);
999
1000 /* Evaluate DSMs and fill XCC information */
1001 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
1002 AMD_XCC_DSM_GET_TMR_INFO, NULL,
1003 ACPI_TYPE_PACKAGE);
1004
1005 if (!obj || obj->package.count < 2) {
1006 acpi_handle_debug(xcc_info->handle,
1007 "_DSM function %d evaluation failed",
1008 AMD_XCC_DSM_GET_TMR_INFO);
1009 ret = -ENOENT;
1010 goto out;
1011 }
1012
1013 tmp->tmr_base = obj->package.elements[0].integer.value;
1014 tmp->tmr_size = obj->package.elements[1].integer.value;
1015 ACPI_FREE(obj);
1016
1017 DRM_DEBUG_DRIVER(
1018 "New dev(%x): Supported xcp mode: %x curr xcp_mode : %x mem mode : %x, tmr base: %llx tmr size: %llx ",
1019 tmp->bdf, tmp->supp_xcp_mode, tmp->xcp_mode, tmp->mem_mode,
1020 tmp->tmr_base, tmp->tmr_size);
1021 list_add_tail(&tmp->list, &amdgpu_acpi_dev_list);
1022 *dev_info = tmp;
1023
1024 return 0;
1025
1026 out:
1027 if (obj)
1028 ACPI_FREE(obj);
1029 kfree(tmp);
1030
1031 return ret;
1032 }
1033
amdgpu_acpi_get_xcc_info(struct amdgpu_acpi_xcc_info * xcc_info,u16 * bdf)1034 static int amdgpu_acpi_get_xcc_info(struct amdgpu_acpi_xcc_info *xcc_info,
1035 u16 *bdf)
1036 {
1037 union acpi_object *obj;
1038 acpi_status status;
1039 int ret = -ENOENT;
1040
1041 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
1042 AMD_XCC_DSM_GET_NUM_FUNCS, NULL,
1043 ACPI_TYPE_INTEGER);
1044
1045 if (!obj || obj->integer.value != AMD_XCC_DSM_NUM_FUNCS)
1046 goto out;
1047 ACPI_FREE(obj);
1048
1049 /* Evaluate DSMs and fill XCC information */
1050 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
1051 AMD_XCC_DSM_GET_VF_XCC_MAPPING, NULL,
1052 ACPI_TYPE_INTEGER);
1053
1054 if (!obj) {
1055 acpi_handle_debug(xcc_info->handle,
1056 "_DSM function %d evaluation failed",
1057 AMD_XCC_DSM_GET_VF_XCC_MAPPING);
1058 ret = -EINVAL;
1059 goto out;
1060 }
1061
1062 /* PF xcc id [39:32] */
1063 xcc_info->phy_id = (obj->integer.value >> 32) & 0xFF;
1064 /* xcp node of this xcc [47:40] */
1065 xcc_info->xcp_node = (obj->integer.value >> 40) & 0xFF;
1066 /* PF bus/dev/fn of this xcc [63:48] */
1067 *bdf = (obj->integer.value >> 48) & 0xFFFF;
1068 ACPI_FREE(obj);
1069 obj = NULL;
1070
1071 status =
1072 amdgpu_acpi_get_node_id(xcc_info->handle, &xcc_info->numa_info);
1073
1074 /* TODO: check if this check is required */
1075 if (ACPI_SUCCESS(status))
1076 ret = 0;
1077 out:
1078 if (obj)
1079 ACPI_FREE(obj);
1080
1081 return ret;
1082 }
1083
amdgpu_acpi_enumerate_xcc(void)1084 static int amdgpu_acpi_enumerate_xcc(void)
1085 {
1086 struct amdgpu_acpi_dev_info *dev_info = NULL;
1087 struct amdgpu_acpi_xcc_info *xcc_info;
1088 struct acpi_device *acpi_dev;
1089 char hid[ACPI_ID_LEN];
1090 int ret, id;
1091 u16 bdf;
1092
1093 INIT_LIST_HEAD(&amdgpu_acpi_dev_list);
1094 xa_init(&numa_info_xa);
1095
1096 for (id = 0; id < AMD_XCC_MAX_HID; id++) {
1097 sprintf(hid, "%s%d", "AMD", AMD_XCC_HID_START + id);
1098 acpi_dev = acpi_dev_get_first_match_dev(hid, NULL, -1);
1099 /* These ACPI objects are expected to be in sequential order. If
1100 * one is not found, no need to check the rest.
1101 */
1102 if (!acpi_dev) {
1103 DRM_DEBUG_DRIVER("No matching acpi device found for %s",
1104 hid);
1105 break;
1106 }
1107
1108 xcc_info = kzalloc(sizeof(struct amdgpu_acpi_xcc_info),
1109 GFP_KERNEL);
1110 if (!xcc_info) {
1111 DRM_ERROR("Failed to allocate memory for xcc info\n");
1112 return -ENOMEM;
1113 }
1114
1115 INIT_LIST_HEAD(&xcc_info->list);
1116 xcc_info->handle = acpi_device_handle(acpi_dev);
1117 acpi_dev_put(acpi_dev);
1118
1119 ret = amdgpu_acpi_get_xcc_info(xcc_info, &bdf);
1120 if (ret) {
1121 kfree(xcc_info);
1122 continue;
1123 }
1124
1125 dev_info = amdgpu_acpi_get_dev(bdf);
1126
1127 if (!dev_info)
1128 ret = amdgpu_acpi_dev_init(&dev_info, xcc_info, bdf);
1129
1130 if (ret == -ENOMEM)
1131 return ret;
1132
1133 if (!dev_info) {
1134 kfree(xcc_info);
1135 continue;
1136 }
1137
1138 list_add_tail(&xcc_info->list, &dev_info->xcc_list);
1139 }
1140
1141 return 0;
1142 }
1143
amdgpu_acpi_get_tmr_info(struct amdgpu_device * adev,u64 * tmr_offset,u64 * tmr_size)1144 int amdgpu_acpi_get_tmr_info(struct amdgpu_device *adev, u64 *tmr_offset,
1145 u64 *tmr_size)
1146 {
1147 struct amdgpu_acpi_dev_info *dev_info;
1148 u16 bdf;
1149
1150 if (!tmr_offset || !tmr_size)
1151 return -EINVAL;
1152
1153 bdf = pci_dev_id(adev->pdev);
1154 dev_info = amdgpu_acpi_get_dev(bdf);
1155 if (!dev_info)
1156 return -ENOENT;
1157
1158 *tmr_offset = dev_info->tmr_base;
1159 *tmr_size = dev_info->tmr_size;
1160
1161 return 0;
1162 }
1163
amdgpu_acpi_get_mem_info(struct amdgpu_device * adev,int xcc_id,struct amdgpu_numa_info * numa_info)1164 int amdgpu_acpi_get_mem_info(struct amdgpu_device *adev, int xcc_id,
1165 struct amdgpu_numa_info *numa_info)
1166 {
1167 struct amdgpu_acpi_dev_info *dev_info;
1168 struct amdgpu_acpi_xcc_info *xcc_info;
1169 u16 bdf;
1170
1171 if (!numa_info)
1172 return -EINVAL;
1173
1174 bdf = pci_dev_id(adev->pdev);
1175 dev_info = amdgpu_acpi_get_dev(bdf);
1176 if (!dev_info)
1177 return -ENOENT;
1178
1179 list_for_each_entry(xcc_info, &dev_info->xcc_list, list) {
1180 if (xcc_info->phy_id == xcc_id) {
1181 memcpy(numa_info, xcc_info->numa_info,
1182 sizeof(*numa_info));
1183 return 0;
1184 }
1185 }
1186
1187 return -ENOENT;
1188 }
1189
1190 /**
1191 * amdgpu_acpi_event - handle notify events
1192 *
1193 * @nb: notifier block
1194 * @val: val
1195 * @data: acpi event
1196 *
1197 * Calls relevant amdgpu functions in response to various
1198 * acpi events.
1199 * Returns NOTIFY code
1200 */
amdgpu_acpi_event(struct notifier_block * nb,unsigned long val,void * data)1201 static int amdgpu_acpi_event(struct notifier_block *nb,
1202 unsigned long val,
1203 void *data)
1204 {
1205 struct amdgpu_device *adev = container_of(nb, struct amdgpu_device, acpi_nb);
1206 struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
1207
1208 if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
1209 if (power_supply_is_system_supplied() > 0)
1210 DRM_DEBUG_DRIVER("pm: AC\n");
1211 else
1212 DRM_DEBUG_DRIVER("pm: DC\n");
1213
1214 amdgpu_pm_acpi_event_handler(adev);
1215 }
1216
1217 /* Check for pending SBIOS requests */
1218 return amdgpu_atif_handler(adev, entry);
1219 }
1220
1221 /* Call all ACPI methods here */
1222 /**
1223 * amdgpu_acpi_init - init driver acpi support
1224 *
1225 * @adev: amdgpu_device pointer
1226 *
1227 * Verifies the AMD ACPI interfaces and registers with the acpi
1228 * notifier chain (all asics).
1229 * Returns 0 on success, error on failure.
1230 */
amdgpu_acpi_init(struct amdgpu_device * adev)1231 int amdgpu_acpi_init(struct amdgpu_device *adev)
1232 {
1233 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1234
1235 if (atif->notifications.brightness_change) {
1236 if (adev->dc_enabled) {
1237 #if defined(CONFIG_DRM_AMD_DC)
1238 struct amdgpu_display_manager *dm = &adev->dm;
1239
1240 if (dm->backlight_dev[0])
1241 atif->bd = dm->backlight_dev[0];
1242 #endif
1243 } else {
1244 struct drm_encoder *tmp;
1245
1246 /* Find the encoder controlling the brightness */
1247 list_for_each_entry(tmp, &adev_to_drm(adev)->mode_config.encoder_list,
1248 head) {
1249 struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp);
1250
1251 if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
1252 enc->enc_priv) {
1253 struct amdgpu_encoder_atom_dig *dig = enc->enc_priv;
1254
1255 if (dig->bl_dev) {
1256 atif->bd = dig->bl_dev;
1257 break;
1258 }
1259 }
1260 }
1261 }
1262 }
1263 adev->acpi_nb.notifier_call = amdgpu_acpi_event;
1264 register_acpi_notifier(&adev->acpi_nb);
1265
1266 return 0;
1267 }
1268
amdgpu_acpi_get_backlight_caps(struct amdgpu_dm_backlight_caps * caps)1269 void amdgpu_acpi_get_backlight_caps(struct amdgpu_dm_backlight_caps *caps)
1270 {
1271 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1272
1273 caps->caps_valid = atif->backlight_caps.caps_valid;
1274 caps->min_input_signal = atif->backlight_caps.min_input_signal;
1275 caps->max_input_signal = atif->backlight_caps.max_input_signal;
1276 }
1277
1278 /**
1279 * amdgpu_acpi_fini - tear down driver acpi support
1280 *
1281 * @adev: amdgpu_device pointer
1282 *
1283 * Unregisters with the acpi notifier chain (all asics).
1284 */
amdgpu_acpi_fini(struct amdgpu_device * adev)1285 void amdgpu_acpi_fini(struct amdgpu_device *adev)
1286 {
1287 unregister_acpi_notifier(&adev->acpi_nb);
1288 }
1289
1290 /**
1291 * amdgpu_atif_pci_probe_handle - look up the ATIF handle
1292 *
1293 * @pdev: pci device
1294 *
1295 * Look up the ATIF handles (all asics).
1296 * Returns true if the handle is found, false if not.
1297 */
amdgpu_atif_pci_probe_handle(struct pci_dev * pdev)1298 static bool amdgpu_atif_pci_probe_handle(struct pci_dev *pdev)
1299 {
1300 char acpi_method_name[255] = { 0 };
1301 struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
1302 acpi_handle dhandle, atif_handle;
1303 acpi_status status;
1304 int ret;
1305
1306 dhandle = ACPI_HANDLE(&pdev->dev);
1307 if (!dhandle)
1308 return false;
1309
1310 status = acpi_get_handle(dhandle, "ATIF", &atif_handle);
1311 if (ACPI_FAILURE(status))
1312 return false;
1313
1314 amdgpu_acpi_priv.atif.handle = atif_handle;
1315 acpi_get_name(amdgpu_acpi_priv.atif.handle, ACPI_FULL_PATHNAME, &buffer);
1316 DRM_DEBUG_DRIVER("Found ATIF handle %s\n", acpi_method_name);
1317 ret = amdgpu_atif_verify_interface(&amdgpu_acpi_priv.atif);
1318 if (ret) {
1319 amdgpu_acpi_priv.atif.handle = 0;
1320 return false;
1321 }
1322 return true;
1323 }
1324
1325 /**
1326 * amdgpu_atcs_pci_probe_handle - look up the ATCS handle
1327 *
1328 * @pdev: pci device
1329 *
1330 * Look up the ATCS handles (all asics).
1331 * Returns true if the handle is found, false if not.
1332 */
amdgpu_atcs_pci_probe_handle(struct pci_dev * pdev)1333 static bool amdgpu_atcs_pci_probe_handle(struct pci_dev *pdev)
1334 {
1335 char acpi_method_name[255] = { 0 };
1336 struct acpi_buffer buffer = { sizeof(acpi_method_name), acpi_method_name };
1337 acpi_handle dhandle, atcs_handle;
1338 acpi_status status;
1339 int ret;
1340
1341 dhandle = ACPI_HANDLE(&pdev->dev);
1342 if (!dhandle)
1343 return false;
1344
1345 status = acpi_get_handle(dhandle, "ATCS", &atcs_handle);
1346 if (ACPI_FAILURE(status))
1347 return false;
1348
1349 amdgpu_acpi_priv.atcs.handle = atcs_handle;
1350 acpi_get_name(amdgpu_acpi_priv.atcs.handle, ACPI_FULL_PATHNAME, &buffer);
1351 DRM_DEBUG_DRIVER("Found ATCS handle %s\n", acpi_method_name);
1352 ret = amdgpu_atcs_verify_interface(&amdgpu_acpi_priv.atcs);
1353 if (ret) {
1354 amdgpu_acpi_priv.atcs.handle = 0;
1355 return false;
1356 }
1357 return true;
1358 }
1359
1360
1361 /**
1362 * amdgpu_acpi_should_gpu_reset
1363 *
1364 * @adev: amdgpu_device_pointer
1365 *
1366 * returns true if should reset GPU, false if not
1367 */
amdgpu_acpi_should_gpu_reset(struct amdgpu_device * adev)1368 bool amdgpu_acpi_should_gpu_reset(struct amdgpu_device *adev)
1369 {
1370 if ((adev->flags & AMD_IS_APU) &&
1371 adev->gfx.imu.funcs) /* Not need to do mode2 reset for IMU enabled APUs */
1372 return false;
1373
1374 if ((adev->flags & AMD_IS_APU) &&
1375 amdgpu_acpi_is_s3_active(adev))
1376 return false;
1377
1378 if (amdgpu_sriov_vf(adev))
1379 return false;
1380
1381 #if IS_ENABLED(CONFIG_SUSPEND)
1382 return pm_suspend_target_state != PM_SUSPEND_TO_IDLE;
1383 #else
1384 return true;
1385 #endif
1386 }
1387
1388 /*
1389 * amdgpu_acpi_detect - detect ACPI ATIF/ATCS methods
1390 *
1391 * Check if we have the ATIF/ATCS methods and populate
1392 * the structures in the driver.
1393 */
amdgpu_acpi_detect(void)1394 void amdgpu_acpi_detect(void)
1395 {
1396 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1397 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
1398 struct pci_dev *pdev = NULL;
1399 int ret;
1400
1401 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
1402 if (!atif->handle)
1403 amdgpu_atif_pci_probe_handle(pdev);
1404 if (!atcs->handle)
1405 amdgpu_atcs_pci_probe_handle(pdev);
1406 }
1407
1408 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
1409 if (!atif->handle)
1410 amdgpu_atif_pci_probe_handle(pdev);
1411 if (!atcs->handle)
1412 amdgpu_atcs_pci_probe_handle(pdev);
1413 }
1414
1415 if (atif->functions.sbios_requests && !atif->functions.system_params) {
1416 /* XXX check this workraround, if sbios request function is
1417 * present we have to see how it's configured in the system
1418 * params
1419 */
1420 atif->functions.system_params = true;
1421 }
1422
1423 if (atif->functions.system_params) {
1424 ret = amdgpu_atif_get_notification_params(atif);
1425 if (ret) {
1426 DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n",
1427 ret);
1428 /* Disable notification */
1429 atif->notification_cfg.enabled = false;
1430 }
1431 }
1432
1433 if (atif->functions.query_backlight_transfer_characteristics) {
1434 ret = amdgpu_atif_query_backlight_caps(atif);
1435 if (ret) {
1436 DRM_DEBUG_DRIVER("Call to QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS failed: %d\n",
1437 ret);
1438 atif->backlight_caps.caps_valid = false;
1439 }
1440 } else {
1441 atif->backlight_caps.caps_valid = false;
1442 }
1443
1444 amdgpu_acpi_enumerate_xcc();
1445 }
1446
amdgpu_acpi_release(void)1447 void amdgpu_acpi_release(void)
1448 {
1449 struct amdgpu_acpi_dev_info *dev_info, *dev_tmp;
1450 struct amdgpu_acpi_xcc_info *xcc_info, *xcc_tmp;
1451 struct amdgpu_numa_info *numa_info;
1452 unsigned long index;
1453
1454 xa_for_each(&numa_info_xa, index, numa_info) {
1455 kfree(numa_info);
1456 xa_erase(&numa_info_xa, index);
1457 }
1458
1459 if (list_empty(&amdgpu_acpi_dev_list))
1460 return;
1461
1462 list_for_each_entry_safe(dev_info, dev_tmp, &amdgpu_acpi_dev_list,
1463 list) {
1464 list_for_each_entry_safe(xcc_info, xcc_tmp, &dev_info->xcc_list,
1465 list) {
1466 list_del(&xcc_info->list);
1467 kfree(xcc_info);
1468 }
1469
1470 list_del(&dev_info->list);
1471 kfree(dev_info);
1472 }
1473 }
1474
1475 #if IS_ENABLED(CONFIG_SUSPEND)
1476 /**
1477 * amdgpu_acpi_is_s3_active
1478 *
1479 * @adev: amdgpu_device_pointer
1480 *
1481 * returns true if supported, false if not.
1482 */
amdgpu_acpi_is_s3_active(struct amdgpu_device * adev)1483 bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev)
1484 {
1485 return !(adev->flags & AMD_IS_APU) ||
1486 (pm_suspend_target_state == PM_SUSPEND_MEM);
1487 }
1488
1489 /**
1490 * amdgpu_acpi_is_s0ix_active
1491 *
1492 * @adev: amdgpu_device_pointer
1493 *
1494 * returns true if supported, false if not.
1495 */
amdgpu_acpi_is_s0ix_active(struct amdgpu_device * adev)1496 bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev)
1497 {
1498 if (!(adev->flags & AMD_IS_APU) ||
1499 (pm_suspend_target_state != PM_SUSPEND_TO_IDLE))
1500 return false;
1501
1502 if (adev->asic_type < CHIP_RAVEN)
1503 return false;
1504
1505 /*
1506 * If ACPI_FADT_LOW_POWER_S0 is not set in the FADT, it is generally
1507 * risky to do any special firmware-related preparations for entering
1508 * S0ix even though the system is suspending to idle, so return false
1509 * in that case.
1510 */
1511 if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) {
1512 dev_err_once(adev->dev,
1513 "Power consumption will be higher as BIOS has not been configured for suspend-to-idle.\n"
1514 "To use suspend-to-idle change the sleep mode in BIOS setup.\n");
1515 return false;
1516 }
1517
1518 #if !IS_ENABLED(CONFIG_AMD_PMC)
1519 dev_err_once(adev->dev,
1520 "Power consumption will be higher as the kernel has not been compiled with CONFIG_AMD_PMC.\n");
1521 return false;
1522 #else
1523 return true;
1524 #endif /* CONFIG_AMD_PMC */
1525 }
1526
1527 #endif /* CONFIG_SUSPEND */
1528