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 kfree(info);
802 return 0;
803 }
804
805 /**
806 * amdgpu_acpi_smart_shift_update - update dGPU device state to SBIOS
807 *
808 * @dev: drm_device pointer
809 * @ss_state: current smart shift event
810 *
811 * returns 0 on success,
812 * otherwise return error number.
813 */
amdgpu_acpi_smart_shift_update(struct drm_device * dev,enum amdgpu_ss ss_state)814 int amdgpu_acpi_smart_shift_update(struct drm_device *dev, enum amdgpu_ss ss_state)
815 {
816 struct amdgpu_device *adev = drm_to_adev(dev);
817 int r;
818
819 if (!amdgpu_device_supports_smart_shift(dev))
820 return 0;
821
822 switch (ss_state) {
823 /* SBIOS trigger “stop”, “enable” and “start” at D0, Driver Operational.
824 * SBIOS trigger “stop” at D3, Driver Not Operational.
825 * SBIOS trigger “stop” and “disable” at D0, Driver NOT operational.
826 */
827 case AMDGPU_SS_DRV_LOAD:
828 r = amdgpu_acpi_power_shift_control(adev,
829 AMDGPU_ATCS_PSC_DEV_STATE_D0,
830 AMDGPU_ATCS_PSC_DRV_STATE_OPR);
831 break;
832 case AMDGPU_SS_DEV_D0:
833 r = amdgpu_acpi_power_shift_control(adev,
834 AMDGPU_ATCS_PSC_DEV_STATE_D0,
835 AMDGPU_ATCS_PSC_DRV_STATE_OPR);
836 break;
837 case AMDGPU_SS_DEV_D3:
838 r = amdgpu_acpi_power_shift_control(adev,
839 AMDGPU_ATCS_PSC_DEV_STATE_D3_HOT,
840 AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
841 break;
842 case AMDGPU_SS_DRV_UNLOAD:
843 r = amdgpu_acpi_power_shift_control(adev,
844 AMDGPU_ATCS_PSC_DEV_STATE_D0,
845 AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
846 break;
847 default:
848 return -EINVAL;
849 }
850
851 return r;
852 }
853
854 #ifdef CONFIG_ACPI_NUMA
amdgpu_acpi_get_numa_size(int nid)855 static inline uint64_t amdgpu_acpi_get_numa_size(int nid)
856 {
857 /* This is directly using si_meminfo_node implementation as the
858 * function is not exported.
859 */
860 int zone_type;
861 uint64_t managed_pages = 0;
862
863 pg_data_t *pgdat = NODE_DATA(nid);
864
865 for (zone_type = 0; zone_type < MAX_NR_ZONES; zone_type++)
866 managed_pages +=
867 zone_managed_pages(&pgdat->node_zones[zone_type]);
868 return managed_pages * PAGE_SIZE;
869 }
870
amdgpu_acpi_get_numa_info(uint32_t pxm)871 static struct amdgpu_numa_info *amdgpu_acpi_get_numa_info(uint32_t pxm)
872 {
873 struct amdgpu_numa_info *numa_info;
874 int nid;
875
876 numa_info = xa_load(&numa_info_xa, pxm);
877
878 if (!numa_info) {
879 struct sysinfo info;
880
881 numa_info = kzalloc(sizeof(*numa_info), GFP_KERNEL);
882 if (!numa_info)
883 return NULL;
884
885 nid = pxm_to_node(pxm);
886 numa_info->pxm = pxm;
887 numa_info->nid = nid;
888
889 if (numa_info->nid == NUMA_NO_NODE) {
890 si_meminfo(&info);
891 numa_info->size = info.totalram * info.mem_unit;
892 } else {
893 numa_info->size = amdgpu_acpi_get_numa_size(nid);
894 }
895 xa_store(&numa_info_xa, numa_info->pxm, numa_info, GFP_KERNEL);
896 }
897
898 return numa_info;
899 }
900 #endif
901
902 /**
903 * amdgpu_acpi_get_node_id - obtain the NUMA node id for corresponding amdgpu
904 * acpi device handle
905 *
906 * @handle: acpi handle
907 * @numa_info: amdgpu_numa_info structure holding numa information
908 *
909 * Queries the ACPI interface to fetch the corresponding NUMA Node ID for a
910 * given amdgpu acpi device.
911 *
912 * Returns ACPI STATUS OK with Node ID on success or the corresponding failure reason
913 */
amdgpu_acpi_get_node_id(acpi_handle handle,struct amdgpu_numa_info ** numa_info)914 static acpi_status amdgpu_acpi_get_node_id(acpi_handle handle,
915 struct amdgpu_numa_info **numa_info)
916 {
917 #ifdef CONFIG_ACPI_NUMA
918 u64 pxm;
919 acpi_status status;
920
921 if (!numa_info)
922 return_ACPI_STATUS(AE_ERROR);
923
924 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
925
926 if (ACPI_FAILURE(status))
927 return status;
928
929 *numa_info = amdgpu_acpi_get_numa_info(pxm);
930
931 if (!*numa_info)
932 return_ACPI_STATUS(AE_ERROR);
933
934 return_ACPI_STATUS(AE_OK);
935 #else
936 return_ACPI_STATUS(AE_NOT_EXIST);
937 #endif
938 }
939
amdgpu_acpi_get_dev(u16 bdf)940 static struct amdgpu_acpi_dev_info *amdgpu_acpi_get_dev(u16 bdf)
941 {
942 struct amdgpu_acpi_dev_info *acpi_dev;
943
944 if (list_empty(&amdgpu_acpi_dev_list))
945 return NULL;
946
947 list_for_each_entry(acpi_dev, &amdgpu_acpi_dev_list, list)
948 if (acpi_dev->bdf == bdf)
949 return acpi_dev;
950
951 return NULL;
952 }
953
amdgpu_acpi_dev_init(struct amdgpu_acpi_dev_info ** dev_info,struct amdgpu_acpi_xcc_info * xcc_info,u16 bdf)954 static int amdgpu_acpi_dev_init(struct amdgpu_acpi_dev_info **dev_info,
955 struct amdgpu_acpi_xcc_info *xcc_info, u16 bdf)
956 {
957 struct amdgpu_acpi_dev_info *tmp;
958 union acpi_object *obj;
959 int ret = -ENOENT;
960
961 *dev_info = NULL;
962 tmp = kzalloc(sizeof(struct amdgpu_acpi_dev_info), GFP_KERNEL);
963 if (!tmp)
964 return -ENOMEM;
965
966 INIT_LIST_HEAD(&tmp->xcc_list);
967 INIT_LIST_HEAD(&tmp->list);
968 tmp->bdf = bdf;
969
970 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
971 AMD_XCC_DSM_GET_SUPP_MODE, NULL,
972 ACPI_TYPE_INTEGER);
973
974 if (!obj) {
975 acpi_handle_debug(xcc_info->handle,
976 "_DSM function %d evaluation failed",
977 AMD_XCC_DSM_GET_SUPP_MODE);
978 ret = -ENOENT;
979 goto out;
980 }
981
982 tmp->supp_xcp_mode = obj->integer.value & 0xFFFF;
983 ACPI_FREE(obj);
984
985 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
986 AMD_XCC_DSM_GET_XCP_MODE, NULL,
987 ACPI_TYPE_INTEGER);
988
989 if (!obj) {
990 acpi_handle_debug(xcc_info->handle,
991 "_DSM function %d evaluation failed",
992 AMD_XCC_DSM_GET_XCP_MODE);
993 ret = -ENOENT;
994 goto out;
995 }
996
997 tmp->xcp_mode = obj->integer.value & 0xFFFF;
998 tmp->mem_mode = (obj->integer.value >> 32) & 0xFFFF;
999 ACPI_FREE(obj);
1000
1001 /* Evaluate DSMs and fill XCC information */
1002 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
1003 AMD_XCC_DSM_GET_TMR_INFO, NULL,
1004 ACPI_TYPE_PACKAGE);
1005
1006 if (!obj || obj->package.count < 2) {
1007 acpi_handle_debug(xcc_info->handle,
1008 "_DSM function %d evaluation failed",
1009 AMD_XCC_DSM_GET_TMR_INFO);
1010 ret = -ENOENT;
1011 goto out;
1012 }
1013
1014 tmp->tmr_base = obj->package.elements[0].integer.value;
1015 tmp->tmr_size = obj->package.elements[1].integer.value;
1016 ACPI_FREE(obj);
1017
1018 DRM_DEBUG_DRIVER(
1019 "New dev(%x): Supported xcp mode: %x curr xcp_mode : %x mem mode : %x, tmr base: %llx tmr size: %llx ",
1020 tmp->bdf, tmp->supp_xcp_mode, tmp->xcp_mode, tmp->mem_mode,
1021 tmp->tmr_base, tmp->tmr_size);
1022 list_add_tail(&tmp->list, &amdgpu_acpi_dev_list);
1023 *dev_info = tmp;
1024
1025 return 0;
1026
1027 out:
1028 if (obj)
1029 ACPI_FREE(obj);
1030 kfree(tmp);
1031
1032 return ret;
1033 }
1034
amdgpu_acpi_get_xcc_info(struct amdgpu_acpi_xcc_info * xcc_info,u16 * bdf)1035 static int amdgpu_acpi_get_xcc_info(struct amdgpu_acpi_xcc_info *xcc_info,
1036 u16 *bdf)
1037 {
1038 union acpi_object *obj;
1039 acpi_status status;
1040 int ret = -ENOENT;
1041
1042 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
1043 AMD_XCC_DSM_GET_NUM_FUNCS, NULL,
1044 ACPI_TYPE_INTEGER);
1045
1046 if (!obj || obj->integer.value != AMD_XCC_DSM_NUM_FUNCS)
1047 goto out;
1048 ACPI_FREE(obj);
1049
1050 /* Evaluate DSMs and fill XCC information */
1051 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
1052 AMD_XCC_DSM_GET_VF_XCC_MAPPING, NULL,
1053 ACPI_TYPE_INTEGER);
1054
1055 if (!obj) {
1056 acpi_handle_debug(xcc_info->handle,
1057 "_DSM function %d evaluation failed",
1058 AMD_XCC_DSM_GET_VF_XCC_MAPPING);
1059 ret = -EINVAL;
1060 goto out;
1061 }
1062
1063 /* PF xcc id [39:32] */
1064 xcc_info->phy_id = (obj->integer.value >> 32) & 0xFF;
1065 /* xcp node of this xcc [47:40] */
1066 xcc_info->xcp_node = (obj->integer.value >> 40) & 0xFF;
1067 /* PF bus/dev/fn of this xcc [63:48] */
1068 *bdf = (obj->integer.value >> 48) & 0xFFFF;
1069 ACPI_FREE(obj);
1070 obj = NULL;
1071
1072 status =
1073 amdgpu_acpi_get_node_id(xcc_info->handle, &xcc_info->numa_info);
1074
1075 /* TODO: check if this check is required */
1076 if (ACPI_SUCCESS(status))
1077 ret = 0;
1078 out:
1079 if (obj)
1080 ACPI_FREE(obj);
1081
1082 return ret;
1083 }
1084
amdgpu_acpi_enumerate_xcc(void)1085 static int amdgpu_acpi_enumerate_xcc(void)
1086 {
1087 struct amdgpu_acpi_dev_info *dev_info = NULL;
1088 struct amdgpu_acpi_xcc_info *xcc_info;
1089 struct acpi_device *acpi_dev;
1090 char hid[ACPI_ID_LEN];
1091 int ret, id;
1092 u16 bdf;
1093
1094 INIT_LIST_HEAD(&amdgpu_acpi_dev_list);
1095 xa_init(&numa_info_xa);
1096
1097 for (id = 0; id < AMD_XCC_MAX_HID; id++) {
1098 sprintf(hid, "%s%d", "AMD", AMD_XCC_HID_START + id);
1099 acpi_dev = acpi_dev_get_first_match_dev(hid, NULL, -1);
1100 /* These ACPI objects are expected to be in sequential order. If
1101 * one is not found, no need to check the rest.
1102 */
1103 if (!acpi_dev) {
1104 DRM_DEBUG_DRIVER("No matching acpi device found for %s",
1105 hid);
1106 break;
1107 }
1108
1109 xcc_info = kzalloc(sizeof(struct amdgpu_acpi_xcc_info),
1110 GFP_KERNEL);
1111 if (!xcc_info) {
1112 DRM_ERROR("Failed to allocate memory for xcc info\n");
1113 return -ENOMEM;
1114 }
1115
1116 INIT_LIST_HEAD(&xcc_info->list);
1117 xcc_info->handle = acpi_device_handle(acpi_dev);
1118 acpi_dev_put(acpi_dev);
1119
1120 ret = amdgpu_acpi_get_xcc_info(xcc_info, &bdf);
1121 if (ret) {
1122 kfree(xcc_info);
1123 continue;
1124 }
1125
1126 dev_info = amdgpu_acpi_get_dev(bdf);
1127
1128 if (!dev_info)
1129 ret = amdgpu_acpi_dev_init(&dev_info, xcc_info, bdf);
1130
1131 if (ret == -ENOMEM)
1132 return ret;
1133
1134 if (!dev_info) {
1135 kfree(xcc_info);
1136 continue;
1137 }
1138
1139 list_add_tail(&xcc_info->list, &dev_info->xcc_list);
1140 }
1141
1142 return 0;
1143 }
1144
amdgpu_acpi_get_tmr_info(struct amdgpu_device * adev,u64 * tmr_offset,u64 * tmr_size)1145 int amdgpu_acpi_get_tmr_info(struct amdgpu_device *adev, u64 *tmr_offset,
1146 u64 *tmr_size)
1147 {
1148 struct amdgpu_acpi_dev_info *dev_info;
1149 u16 bdf;
1150
1151 if (!tmr_offset || !tmr_size)
1152 return -EINVAL;
1153
1154 bdf = pci_dev_id(adev->pdev);
1155 dev_info = amdgpu_acpi_get_dev(bdf);
1156 if (!dev_info)
1157 return -ENOENT;
1158
1159 *tmr_offset = dev_info->tmr_base;
1160 *tmr_size = dev_info->tmr_size;
1161
1162 return 0;
1163 }
1164
amdgpu_acpi_get_mem_info(struct amdgpu_device * adev,int xcc_id,struct amdgpu_numa_info * numa_info)1165 int amdgpu_acpi_get_mem_info(struct amdgpu_device *adev, int xcc_id,
1166 struct amdgpu_numa_info *numa_info)
1167 {
1168 struct amdgpu_acpi_dev_info *dev_info;
1169 struct amdgpu_acpi_xcc_info *xcc_info;
1170 u16 bdf;
1171
1172 if (!numa_info)
1173 return -EINVAL;
1174
1175 bdf = pci_dev_id(adev->pdev);
1176 dev_info = amdgpu_acpi_get_dev(bdf);
1177 if (!dev_info)
1178 return -ENOENT;
1179
1180 list_for_each_entry(xcc_info, &dev_info->xcc_list, list) {
1181 if (xcc_info->phy_id == xcc_id) {
1182 memcpy(numa_info, xcc_info->numa_info,
1183 sizeof(*numa_info));
1184 return 0;
1185 }
1186 }
1187
1188 return -ENOENT;
1189 }
1190
1191 /**
1192 * amdgpu_acpi_event - handle notify events
1193 *
1194 * @nb: notifier block
1195 * @val: val
1196 * @data: acpi event
1197 *
1198 * Calls relevant amdgpu functions in response to various
1199 * acpi events.
1200 * Returns NOTIFY code
1201 */
amdgpu_acpi_event(struct notifier_block * nb,unsigned long val,void * data)1202 static int amdgpu_acpi_event(struct notifier_block *nb,
1203 unsigned long val,
1204 void *data)
1205 {
1206 struct amdgpu_device *adev = container_of(nb, struct amdgpu_device, acpi_nb);
1207 struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
1208
1209 if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
1210 if (power_supply_is_system_supplied() > 0)
1211 DRM_DEBUG_DRIVER("pm: AC\n");
1212 else
1213 DRM_DEBUG_DRIVER("pm: DC\n");
1214
1215 amdgpu_pm_acpi_event_handler(adev);
1216 }
1217
1218 /* Check for pending SBIOS requests */
1219 return amdgpu_atif_handler(adev, entry);
1220 }
1221
1222 /* Call all ACPI methods here */
1223 /**
1224 * amdgpu_acpi_init - init driver acpi support
1225 *
1226 * @adev: amdgpu_device pointer
1227 *
1228 * Verifies the AMD ACPI interfaces and registers with the acpi
1229 * notifier chain (all asics).
1230 * Returns 0 on success, error on failure.
1231 */
amdgpu_acpi_init(struct amdgpu_device * adev)1232 int amdgpu_acpi_init(struct amdgpu_device *adev)
1233 {
1234 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1235
1236 if (atif->notifications.brightness_change) {
1237 if (adev->dc_enabled) {
1238 #if defined(CONFIG_DRM_AMD_DC)
1239 struct amdgpu_display_manager *dm = &adev->dm;
1240
1241 if (dm->backlight_dev[0])
1242 atif->bd = dm->backlight_dev[0];
1243 #endif
1244 } else {
1245 struct drm_encoder *tmp;
1246
1247 /* Find the encoder controlling the brightness */
1248 list_for_each_entry(tmp, &adev_to_drm(adev)->mode_config.encoder_list,
1249 head) {
1250 struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp);
1251
1252 if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
1253 enc->enc_priv) {
1254 struct amdgpu_encoder_atom_dig *dig = enc->enc_priv;
1255
1256 if (dig->bl_dev) {
1257 atif->bd = dig->bl_dev;
1258 break;
1259 }
1260 }
1261 }
1262 }
1263 }
1264 adev->acpi_nb.notifier_call = amdgpu_acpi_event;
1265 register_acpi_notifier(&adev->acpi_nb);
1266
1267 return 0;
1268 }
1269
amdgpu_acpi_get_backlight_caps(struct amdgpu_dm_backlight_caps * caps)1270 void amdgpu_acpi_get_backlight_caps(struct amdgpu_dm_backlight_caps *caps)
1271 {
1272 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1273
1274 caps->caps_valid = atif->backlight_caps.caps_valid;
1275 caps->min_input_signal = atif->backlight_caps.min_input_signal;
1276 caps->max_input_signal = atif->backlight_caps.max_input_signal;
1277 }
1278
1279 /**
1280 * amdgpu_acpi_fini - tear down driver acpi support
1281 *
1282 * @adev: amdgpu_device pointer
1283 *
1284 * Unregisters with the acpi notifier chain (all asics).
1285 */
amdgpu_acpi_fini(struct amdgpu_device * adev)1286 void amdgpu_acpi_fini(struct amdgpu_device *adev)
1287 {
1288 unregister_acpi_notifier(&adev->acpi_nb);
1289 }
1290
1291 /**
1292 * amdgpu_atif_pci_probe_handle - look up the ATIF handle
1293 *
1294 * @pdev: pci device
1295 *
1296 * Look up the ATIF handles (all asics).
1297 * Returns true if the handle is found, false if not.
1298 */
amdgpu_atif_pci_probe_handle(struct pci_dev * pdev)1299 static bool amdgpu_atif_pci_probe_handle(struct pci_dev *pdev)
1300 {
1301 char acpi_method_name[255] = { 0 };
1302 struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
1303 acpi_handle dhandle, atif_handle;
1304 acpi_status status;
1305 int ret;
1306
1307 dhandle = ACPI_HANDLE(&pdev->dev);
1308 if (!dhandle)
1309 return false;
1310
1311 status = acpi_get_handle(dhandle, "ATIF", &atif_handle);
1312 if (ACPI_FAILURE(status))
1313 return false;
1314
1315 amdgpu_acpi_priv.atif.handle = atif_handle;
1316 acpi_get_name(amdgpu_acpi_priv.atif.handle, ACPI_FULL_PATHNAME, &buffer);
1317 DRM_DEBUG_DRIVER("Found ATIF handle %s\n", acpi_method_name);
1318 ret = amdgpu_atif_verify_interface(&amdgpu_acpi_priv.atif);
1319 if (ret) {
1320 amdgpu_acpi_priv.atif.handle = 0;
1321 return false;
1322 }
1323 return true;
1324 }
1325
1326 /**
1327 * amdgpu_atcs_pci_probe_handle - look up the ATCS handle
1328 *
1329 * @pdev: pci device
1330 *
1331 * Look up the ATCS handles (all asics).
1332 * Returns true if the handle is found, false if not.
1333 */
amdgpu_atcs_pci_probe_handle(struct pci_dev * pdev)1334 static bool amdgpu_atcs_pci_probe_handle(struct pci_dev *pdev)
1335 {
1336 char acpi_method_name[255] = { 0 };
1337 struct acpi_buffer buffer = { sizeof(acpi_method_name), acpi_method_name };
1338 acpi_handle dhandle, atcs_handle;
1339 acpi_status status;
1340 int ret;
1341
1342 dhandle = ACPI_HANDLE(&pdev->dev);
1343 if (!dhandle)
1344 return false;
1345
1346 status = acpi_get_handle(dhandle, "ATCS", &atcs_handle);
1347 if (ACPI_FAILURE(status))
1348 return false;
1349
1350 amdgpu_acpi_priv.atcs.handle = atcs_handle;
1351 acpi_get_name(amdgpu_acpi_priv.atcs.handle, ACPI_FULL_PATHNAME, &buffer);
1352 DRM_DEBUG_DRIVER("Found ATCS handle %s\n", acpi_method_name);
1353 ret = amdgpu_atcs_verify_interface(&amdgpu_acpi_priv.atcs);
1354 if (ret) {
1355 amdgpu_acpi_priv.atcs.handle = 0;
1356 return false;
1357 }
1358 return true;
1359 }
1360
1361
1362 /**
1363 * amdgpu_acpi_should_gpu_reset
1364 *
1365 * @adev: amdgpu_device_pointer
1366 *
1367 * returns true if should reset GPU, false if not
1368 */
amdgpu_acpi_should_gpu_reset(struct amdgpu_device * adev)1369 bool amdgpu_acpi_should_gpu_reset(struct amdgpu_device *adev)
1370 {
1371 if ((adev->flags & AMD_IS_APU) &&
1372 adev->gfx.imu.funcs) /* Not need to do mode2 reset for IMU enabled APUs */
1373 return false;
1374
1375 if ((adev->flags & AMD_IS_APU) &&
1376 amdgpu_acpi_is_s3_active(adev))
1377 return false;
1378
1379 if (amdgpu_sriov_vf(adev))
1380 return false;
1381
1382 #if IS_ENABLED(CONFIG_SUSPEND)
1383 return pm_suspend_target_state != PM_SUSPEND_TO_IDLE;
1384 #else
1385 return true;
1386 #endif
1387 }
1388
1389 /*
1390 * amdgpu_acpi_detect - detect ACPI ATIF/ATCS methods
1391 *
1392 * Check if we have the ATIF/ATCS methods and populate
1393 * the structures in the driver.
1394 */
amdgpu_acpi_detect(void)1395 void amdgpu_acpi_detect(void)
1396 {
1397 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1398 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
1399 struct pci_dev *pdev = NULL;
1400 int ret;
1401
1402 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
1403 if (!atif->handle)
1404 amdgpu_atif_pci_probe_handle(pdev);
1405 if (!atcs->handle)
1406 amdgpu_atcs_pci_probe_handle(pdev);
1407 }
1408
1409 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
1410 if (!atif->handle)
1411 amdgpu_atif_pci_probe_handle(pdev);
1412 if (!atcs->handle)
1413 amdgpu_atcs_pci_probe_handle(pdev);
1414 }
1415
1416 if (atif->functions.sbios_requests && !atif->functions.system_params) {
1417 /* XXX check this workraround, if sbios request function is
1418 * present we have to see how it's configured in the system
1419 * params
1420 */
1421 atif->functions.system_params = true;
1422 }
1423
1424 if (atif->functions.system_params) {
1425 ret = amdgpu_atif_get_notification_params(atif);
1426 if (ret) {
1427 DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n",
1428 ret);
1429 /* Disable notification */
1430 atif->notification_cfg.enabled = false;
1431 }
1432 }
1433
1434 if (atif->functions.query_backlight_transfer_characteristics) {
1435 ret = amdgpu_atif_query_backlight_caps(atif);
1436 if (ret) {
1437 DRM_DEBUG_DRIVER("Call to QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS failed: %d\n",
1438 ret);
1439 atif->backlight_caps.caps_valid = false;
1440 }
1441 } else {
1442 atif->backlight_caps.caps_valid = false;
1443 }
1444
1445 amdgpu_acpi_enumerate_xcc();
1446 }
1447
amdgpu_acpi_release(void)1448 void amdgpu_acpi_release(void)
1449 {
1450 struct amdgpu_acpi_dev_info *dev_info, *dev_tmp;
1451 struct amdgpu_acpi_xcc_info *xcc_info, *xcc_tmp;
1452 struct amdgpu_numa_info *numa_info;
1453 unsigned long index;
1454
1455 xa_for_each(&numa_info_xa, index, numa_info) {
1456 kfree(numa_info);
1457 xa_erase(&numa_info_xa, index);
1458 }
1459
1460 if (list_empty(&amdgpu_acpi_dev_list))
1461 return;
1462
1463 list_for_each_entry_safe(dev_info, dev_tmp, &amdgpu_acpi_dev_list,
1464 list) {
1465 list_for_each_entry_safe(xcc_info, xcc_tmp, &dev_info->xcc_list,
1466 list) {
1467 list_del(&xcc_info->list);
1468 kfree(xcc_info);
1469 }
1470
1471 list_del(&dev_info->list);
1472 kfree(dev_info);
1473 }
1474 }
1475
1476 #if IS_ENABLED(CONFIG_SUSPEND)
1477 /**
1478 * amdgpu_acpi_is_s3_active
1479 *
1480 * @adev: amdgpu_device_pointer
1481 *
1482 * returns true if supported, false if not.
1483 */
amdgpu_acpi_is_s3_active(struct amdgpu_device * adev)1484 bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev)
1485 {
1486 return !(adev->flags & AMD_IS_APU) ||
1487 (pm_suspend_target_state == PM_SUSPEND_MEM);
1488 }
1489
1490 /**
1491 * amdgpu_acpi_is_s0ix_active
1492 *
1493 * @adev: amdgpu_device_pointer
1494 *
1495 * returns true if supported, false if not.
1496 */
amdgpu_acpi_is_s0ix_active(struct amdgpu_device * adev)1497 bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev)
1498 {
1499 if (!(adev->flags & AMD_IS_APU) ||
1500 (pm_suspend_target_state != PM_SUSPEND_TO_IDLE))
1501 return false;
1502
1503 if (adev->asic_type < CHIP_RAVEN)
1504 return false;
1505
1506 /*
1507 * If ACPI_FADT_LOW_POWER_S0 is not set in the FADT, it is generally
1508 * risky to do any special firmware-related preparations for entering
1509 * S0ix even though the system is suspending to idle, so return false
1510 * in that case.
1511 */
1512 if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) {
1513 dev_err_once(adev->dev,
1514 "Power consumption will be higher as BIOS has not been configured for suspend-to-idle.\n"
1515 "To use suspend-to-idle change the sleep mode in BIOS setup.\n");
1516 return false;
1517 }
1518
1519 #if !IS_ENABLED(CONFIG_AMD_PMC)
1520 dev_err_once(adev->dev,
1521 "Power consumption will be higher as the kernel has not been compiled with CONFIG_AMD_PMC.\n");
1522 return false;
1523 #else
1524 return true;
1525 #endif /* CONFIG_AMD_PMC */
1526 }
1527
1528 #endif /* CONFIG_SUSPEND */
1529