[linux-block.git] / drivers / platform / x86 / amd / pmf / acpi.c

// SPDX-License-Identifier: GPL-2.0
/*
 * AMD Platform Management Framework Driver
 *
 * Copyright (c) 2022, Advanced Micro Devices, Inc.
 * All Rights Reserved.
 *
 * Author: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
 */

#include <linux/acpi.h>
#include "pmf.h"

#define APMF_CQL_NOTIFICATION  2
#define APMF_AMT_NOTIFICATION  3

static union acpi_object *apmf_if_call(struct amd_pmf_dev *pdev, int fn, struct acpi_buffer *param)
{
	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	acpi_handle ahandle = ACPI_HANDLE(pdev->dev);
	struct acpi_object_list apmf_if_arg_list;
	union acpi_object apmf_if_args[2];
	acpi_status status;

	apmf_if_arg_list.count = 2;
	apmf_if_arg_list.pointer = &apmf_if_args[0];

	apmf_if_args[0].type = ACPI_TYPE_INTEGER;
	apmf_if_args[0].integer.value = fn;

	if (param) {
		apmf_if_args[1].type = ACPI_TYPE_BUFFER;
		apmf_if_args[1].buffer.length = param->length;
		apmf_if_args[1].buffer.pointer = param->pointer;
	} else {
		apmf_if_args[1].type = ACPI_TYPE_INTEGER;
		apmf_if_args[1].integer.value = 0;
	}

	status = acpi_evaluate_object(ahandle, "APMF", &apmf_if_arg_list, &buffer);
	if (ACPI_FAILURE(status)) {
		dev_err(pdev->dev, "APMF method:%d call failed\n", fn);
		kfree(buffer.pointer);
		return NULL;
	}

	return buffer.pointer;
}

static int apmf_if_call_store_buffer(struct amd_pmf_dev *pdev, int fn, void *dest, size_t out_sz)
{
	union acpi_object *info;
	size_t size;
	int err = 0;

	info = apmf_if_call(pdev, fn, NULL);
	if (!info)
		return -EIO;

	if (info->type != ACPI_TYPE_BUFFER) {
		dev_err(pdev->dev, "object is not a buffer\n");
		err = -EINVAL;
		goto out;
	}

	if (info->buffer.length < 2) {
		dev_err(pdev->dev, "buffer too small\n");
		err = -EINVAL;
		goto out;
	}

	size = *(u16 *)info->buffer.pointer;
	if (info->buffer.length < size) {
		dev_err(pdev->dev, "buffer smaller then headersize %u < %zu\n",
			info->buffer.length, size);
		err = -EINVAL;
		goto out;
	}

	if (size < out_sz) {
		dev_err(pdev->dev, "buffer too small %zu\n", size);
		err = -EINVAL;
		goto out;
	}

	memcpy(dest, info->buffer.pointer, out_sz);

out:
	kfree(info);
	return err;
}

static union acpi_object *apts_if_call(struct amd_pmf_dev *pdev, u32 state_index)
{
	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	acpi_handle ahandle = ACPI_HANDLE(pdev->dev);
	struct acpi_object_list apts_if_arg_list;
	union acpi_object apts_if_args[3];
	acpi_status status;

	apts_if_arg_list.count = 3;
	apts_if_arg_list.pointer = &apts_if_args[0];

	apts_if_args[0].type = ACPI_TYPE_INTEGER;
	apts_if_args[0].integer.value = 1;
	apts_if_args[1].type = ACPI_TYPE_INTEGER;
	apts_if_args[1].integer.value = state_index;
	apts_if_args[2].type = ACPI_TYPE_INTEGER;
	apts_if_args[2].integer.value = 0;

	status = acpi_evaluate_object(ahandle, "APTS", &apts_if_arg_list, &buffer);
	if (ACPI_FAILURE(status)) {
		dev_err(pdev->dev, "APTS state_idx:%u call failed\n", state_index);
		kfree(buffer.pointer);
		return NULL;
	}

	return buffer.pointer;
}

static int apts_if_call_store_buffer(struct amd_pmf_dev *pdev,
				     u32 index, void *data, size_t out_sz)
{
	union acpi_object *info;
	size_t size;
	int err = 0;

	info = apts_if_call(pdev, index);
	if (!info)
		return -EIO;

	if (info->type != ACPI_TYPE_BUFFER) {
		dev_err(pdev->dev, "object is not a buffer\n");
		err = -EINVAL;
		goto out;
	}

	size = *(u16 *)info->buffer.pointer;
	if (info->buffer.length < size) {
		dev_err(pdev->dev, "buffer smaller than header size %u < %zu\n",
			info->buffer.length, size);
		err = -EINVAL;
		goto out;
	}

	if (size < out_sz) {
		dev_err(pdev->dev, "buffer too small %zu\n", size);
		err = -EINVAL;
		goto out;
	}

	memcpy(data, info->buffer.pointer, out_sz);
out:
	kfree(info);
	return err;
}

int is_apmf_func_supported(struct amd_pmf_dev *pdev, unsigned long index)
{
	/* If bit-n is set, that indicates function n+1 is supported */
	return !!(pdev->supported_func & BIT(index - 1));
}

int apts_get_static_slider_granular_v2(struct amd_pmf_dev *pdev,
				       struct amd_pmf_apts_granular_output *data, u32 apts_idx)
{
	if (!is_apmf_func_supported(pdev, APMF_FUNC_STATIC_SLIDER_GRANULAR))
		return -EINVAL;

	return apts_if_call_store_buffer(pdev, apts_idx, data, sizeof(*data));
}

int apmf_get_static_slider_granular_v2(struct amd_pmf_dev *pdev,
				       struct apmf_static_slider_granular_output_v2 *data)
{
	if (!is_apmf_func_supported(pdev, APMF_FUNC_STATIC_SLIDER_GRANULAR))
		return -EINVAL;

	return apmf_if_call_store_buffer(pdev, APMF_FUNC_STATIC_SLIDER_GRANULAR,
					 data, sizeof(*data));
}

int apmf_get_static_slider_granular(struct amd_pmf_dev *pdev,
				    struct apmf_static_slider_granular_output *data)
{
	if (!is_apmf_func_supported(pdev, APMF_FUNC_STATIC_SLIDER_GRANULAR))
		return -EINVAL;

	return apmf_if_call_store_buffer(pdev, APMF_FUNC_STATIC_SLIDER_GRANULAR,
									 data, sizeof(*data));
}

int apmf_os_power_slider_update(struct amd_pmf_dev *pdev, u8 event)
{
	struct os_power_slider args;
	struct acpi_buffer params;
	union acpi_object *info;

	args.size = sizeof(args);
	args.slider_event = event;

	params.length = sizeof(args);
	params.pointer = (void *)&args;

	info = apmf_if_call(pdev, APMF_FUNC_OS_POWER_SLIDER_UPDATE, &params);
	if (!info)
		return -EIO;

	kfree(info);
	return 0;
}

static void apmf_sbios_heartbeat_notify(struct work_struct *work)
{
	struct amd_pmf_dev *dev = container_of(work, struct amd_pmf_dev, heart_beat.work);
	union acpi_object *info;

	dev_dbg(dev->dev, "Sending heartbeat to SBIOS\n");
	info = apmf_if_call(dev, APMF_FUNC_SBIOS_HEARTBEAT, NULL);
	if (!info)
		return;

	schedule_delayed_work(&dev->heart_beat, msecs_to_jiffies(dev->hb_interval * 1000));
	kfree(info);
}

int amd_pmf_notify_sbios_heartbeat_event_v2(struct amd_pmf_dev *dev, u8 flag)
{
	struct sbios_hb_event_v2 args = { };
	struct acpi_buffer params;
	union acpi_object *info;

	args.size = sizeof(args);

	switch (flag) {
	case ON_LOAD:
		args.load = 1;
		break;
	case ON_UNLOAD:
		args.unload = 1;
		break;
	case ON_SUSPEND:
		args.suspend = 1;
		break;
	case ON_RESUME:
		args.resume = 1;
		break;
	default:
		dev_dbg(dev->dev, "Failed to send v2 heartbeat event, flag:0x%x\n", flag);
		return -EINVAL;
	}

	params.length = sizeof(args);
	params.pointer = &args;

	info = apmf_if_call(dev, APMF_FUNC_SBIOS_HEARTBEAT_V2, &params);
	if (!info)
		return -EIO;

	kfree(info);
	return 0;
}

int apmf_update_fan_idx(struct amd_pmf_dev *pdev, bool manual, u32 idx)
{
	union acpi_object *info;
	struct apmf_fan_idx args;
	struct acpi_buffer params;

	args.size = sizeof(args);
	args.fan_ctl_mode = manual;
	args.fan_ctl_idx = idx;

	params.length = sizeof(args);
	params.pointer = (void *)&args;

	info = apmf_if_call(pdev, APMF_FUNC_SET_FAN_IDX, &params);
	if (!info)
		return -EIO;

	kfree(info);
	return 0;
}

int apmf_get_auto_mode_def(struct amd_pmf_dev *pdev, struct apmf_auto_mode *data)
{
	return apmf_if_call_store_buffer(pdev, APMF_FUNC_AUTO_MODE, data, sizeof(*data));
}

int apmf_get_sbios_requests_v2(struct amd_pmf_dev *pdev, struct apmf_sbios_req_v2 *req)
{
	return apmf_if_call_store_buffer(pdev, APMF_FUNC_SBIOS_REQUESTS, req, sizeof(*req));
}

int apmf_get_sbios_requests(struct amd_pmf_dev *pdev, struct apmf_sbios_req *req)
{
	return apmf_if_call_store_buffer(pdev, APMF_FUNC_SBIOS_REQUESTS,
									 req, sizeof(*req));
}

static void apmf_event_handler(acpi_handle handle, u32 event, void *data)
{
	struct amd_pmf_dev *pmf_dev = data;
	struct apmf_sbios_req req;
	int ret;

	mutex_lock(&pmf_dev->update_mutex);
	ret = apmf_get_sbios_requests(pmf_dev, &req);
	if (ret) {
		dev_err(pmf_dev->dev, "Failed to get SBIOS requests:%d\n", ret);
		goto out;
	}

	if (req.pending_req & BIT(APMF_AMT_NOTIFICATION)) {
		dev_dbg(pmf_dev->dev, "AMT is supported and notifications %s\n",
			req.amt_event ? "Enabled" : "Disabled");
		pmf_dev->amt_enabled = !!req.amt_event;

		if (pmf_dev->amt_enabled)
			amd_pmf_handle_amt(pmf_dev);
		else
			amd_pmf_reset_amt(pmf_dev);
	}

	if (req.pending_req & BIT(APMF_CQL_NOTIFICATION)) {
		dev_dbg(pmf_dev->dev, "CQL is supported and notifications %s\n",
			req.cql_event ? "Enabled" : "Disabled");

		/* update the target mode information */
		if (pmf_dev->amt_enabled)
			amd_pmf_update_2_cql(pmf_dev, req.cql_event);
	}
out:
	mutex_unlock(&pmf_dev->update_mutex);
}

static int apmf_if_verify_interface(struct amd_pmf_dev *pdev)
{
	struct apmf_verify_interface output;
	int err;

	err = apmf_if_call_store_buffer(pdev, APMF_FUNC_VERIFY_INTERFACE, &output, sizeof(output));
	if (err)
		return err;

	/* only set if not already set by a quirk */
	if (!pdev->supported_func)
		pdev->supported_func = output.supported_functions;

	dev_dbg(pdev->dev, "supported functions:0x%x notifications:0x%x version:%u\n",
		output.supported_functions, output.notification_mask, output.version);

	pdev->pmf_if_version = output.version;

	return 0;
}

static int apmf_get_system_params(struct amd_pmf_dev *dev)
{
	struct apmf_system_params params;
	int err;

	if (!is_apmf_func_supported(dev, APMF_FUNC_GET_SYS_PARAMS))
		return -EINVAL;

	err = apmf_if_call_store_buffer(dev, APMF_FUNC_GET_SYS_PARAMS, &params, sizeof(params));
	if (err)
		return err;

	dev_dbg(dev->dev, "system params mask:0x%x flags:0x%x cmd_code:0x%x heartbeat:%d\n",
		params.valid_mask,
		params.flags,
		params.command_code,
		params.heartbeat_int);
	params.flags = params.flags & params.valid_mask;
	dev->hb_interval = params.heartbeat_int;

	return 0;
}

int apmf_get_dyn_slider_def_ac(struct amd_pmf_dev *pdev, struct apmf_dyn_slider_output *data)
{
	return apmf_if_call_store_buffer(pdev, APMF_FUNC_DYN_SLIDER_AC, data, sizeof(*data));
}

int apmf_get_dyn_slider_def_dc(struct amd_pmf_dev *pdev, struct apmf_dyn_slider_output *data)
{
	return apmf_if_call_store_buffer(pdev, APMF_FUNC_DYN_SLIDER_DC, data, sizeof(*data));
}

int apmf_install_handler(struct amd_pmf_dev *pmf_dev)
{
	acpi_handle ahandle = ACPI_HANDLE(pmf_dev->dev);
	acpi_status status;

	/* Install the APMF Notify handler */
	if (is_apmf_func_supported(pmf_dev, APMF_FUNC_AUTO_MODE) &&
	    is_apmf_func_supported(pmf_dev, APMF_FUNC_SBIOS_REQUESTS)) {
		status = acpi_install_notify_handler(ahandle, ACPI_ALL_NOTIFY,
						     apmf_event_handler, pmf_dev);
		if (ACPI_FAILURE(status)) {
			dev_err(pmf_dev->dev, "failed to install notify handler\n");
			return -ENODEV;
		}

		/* Call the handler once manually to catch up with possibly missed notifies. */
		apmf_event_handler(ahandle, 0, pmf_dev);
	}

	return 0;
}

static acpi_status apmf_walk_resources(struct acpi_resource *res, void *data)
{
	struct amd_pmf_dev *dev = data;

	switch (res->type) {
	case ACPI_RESOURCE_TYPE_ADDRESS64:
		dev->policy_addr = res->data.address64.address.minimum;
		dev->policy_sz = res->data.address64.address.address_length;
		break;
	case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
		dev->policy_addr = res->data.fixed_memory32.address;
		dev->policy_sz = res->data.fixed_memory32.address_length;
		break;
	}

	if (!dev->policy_addr || dev->policy_sz > POLICY_BUF_MAX_SZ || dev->policy_sz == 0) {
		pr_err("Incorrect Policy params, possibly a SBIOS bug\n");
		return AE_ERROR;
	}

	return AE_OK;
}

int apmf_check_smart_pc(struct amd_pmf_dev *pmf_dev)
{
	acpi_handle ahandle = ACPI_HANDLE(pmf_dev->dev);
	acpi_status status;

	status = acpi_walk_resources(ahandle, METHOD_NAME__CRS, apmf_walk_resources, pmf_dev);
	if (ACPI_FAILURE(status)) {
		dev_dbg(pmf_dev->dev, "acpi_walk_resources failed :%d\n", status);
		return -EINVAL;
	}

	return 0;
}

void apmf_acpi_deinit(struct amd_pmf_dev *pmf_dev)
{
	acpi_handle ahandle = ACPI_HANDLE(pmf_dev->dev);

	if (pmf_dev->hb_interval && pmf_dev->pmf_if_version == PMF_IF_V1)
		cancel_delayed_work_sync(&pmf_dev->heart_beat);

	if (is_apmf_func_supported(pmf_dev, APMF_FUNC_AUTO_MODE) &&
	    is_apmf_func_supported(pmf_dev, APMF_FUNC_SBIOS_REQUESTS))
		acpi_remove_notify_handler(ahandle, ACPI_ALL_NOTIFY, apmf_event_handler);
}

int apmf_acpi_init(struct amd_pmf_dev *pmf_dev)
{
	int ret;

	ret = apmf_if_verify_interface(pmf_dev);
	if (ret) {
		dev_err(pmf_dev->dev, "APMF verify interface failed :%d\n", ret);
		goto out;
	}

	ret = apmf_get_system_params(pmf_dev);
	if (ret) {
		dev_dbg(pmf_dev->dev, "APMF apmf_get_system_params failed :%d\n", ret);
		goto out;
	}

	if (pmf_dev->hb_interval && pmf_dev->pmf_if_version == PMF_IF_V1) {
		/* send heartbeats only if the interval is not zero */
		INIT_DELAYED_WORK(&pmf_dev->heart_beat, apmf_sbios_heartbeat_notify);
		schedule_delayed_work(&pmf_dev->heart_beat, 0);
	}

out:
	return ret;
}
Commit	Line	Data
5eb315eb SS	1	// SPDX-License-Identifier: GPL-2.0
	2	/*
	3	* AMD Platform Management Framework Driver
	4	*
	5	* Copyright (c) 2022, Advanced Micro Devices, Inc.
	6	* All Rights Reserved.
	7	*
	8	* Author: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
	9	*/
	10
	11	#include <linux/acpi.h>
	12	#include "pmf.h"
	13
7d77dcc8 SS	14	#define APMF_CQL_NOTIFICATION 2
	15	#define APMF_AMT_NOTIFICATION 3
	16
5eb315eb SS	17	static union acpi_object apmf_if_call(struct amd_pmf_dev pdev, int fn, struct acpi_buffer *param)
	18	{
	19	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	20	acpi_handle ahandle = ACPI_HANDLE(pdev->dev);
	21	struct acpi_object_list apmf_if_arg_list;
	22	union acpi_object apmf_if_args[2];
	23	acpi_status status;
	24
	25	apmf_if_arg_list.count = 2;
	26	apmf_if_arg_list.pointer = &apmf_if_args[0];
	27
	28	apmf_if_args[0].type = ACPI_TYPE_INTEGER;
	29	apmf_if_args[0].integer.value = fn;
	30
	31	if (param) {
	32	apmf_if_args[1].type = ACPI_TYPE_BUFFER;
	33	apmf_if_args[1].buffer.length = param->length;
	34	apmf_if_args[1].buffer.pointer = param->pointer;
	35	} else {
	36	apmf_if_args[1].type = ACPI_TYPE_INTEGER;
	37	apmf_if_args[1].integer.value = 0;
	38	}
	39
	40	status = acpi_evaluate_object(ahandle, "APMF", &apmf_if_arg_list, &buffer);
	41	if (ACPI_FAILURE(status)) {
	42	dev_err(pdev->dev, "APMF method:%d call failed\n", fn);
	43	kfree(buffer.pointer);
	44	return NULL;
	45	}
	46
	47	return buffer.pointer;
	48	}
	49
	50	static int apmf_if_call_store_buffer(struct amd_pmf_dev pdev, int fn, void dest, size_t out_sz)
	51	{
	52	union acpi_object *info;
	53	size_t size;
	54	int err = 0;
	55
	56	info = apmf_if_call(pdev, fn, NULL);
	57	if (!info)
	58	return -EIO;
	59
	60	if (info->type != ACPI_TYPE_BUFFER) {
	61	dev_err(pdev->dev, "object is not a buffer\n");
	62	err = -EINVAL;
	63	goto out;
	64	}
	65
	66	if (info->buffer.length < 2) {
	67	dev_err(pdev->dev, "buffer too small\n");
	68	err = -EINVAL;
	69	goto out;
	70	}
	71
	72	size = (u16 )info->buffer.pointer;
	73	if (info->buffer.length < size) {
	74	dev_err(pdev->dev, "buffer smaller then headersize %u < %zu\n",
	75	info->buffer.length, size);
	76	err = -EINVAL;
	77	goto out;
	78	}
	79
	80	if (size < out_sz) {
81	dev_err(pdev->dev, "buffer too small %zu\n", size);
82	err = -EINVAL;
83	goto out;
84	}
85
86	memcpy(dest, info->buffer.pointer, out_sz);
87
88	out:
89	kfree(info);
90	return err;
91	}
92
3eecb434 SS	93	static union acpi_object apts_if_call(struct amd_pmf_dev pdev, u32 state_index)
	94	{
	95	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	96	acpi_handle ahandle = ACPI_HANDLE(pdev->dev);
	97	struct acpi_object_list apts_if_arg_list;
	98	union acpi_object apts_if_args[3];
	99	acpi_status status;
	100
	101	apts_if_arg_list.count = 3;
	102	apts_if_arg_list.pointer = &apts_if_args[0];
	103
	104	apts_if_args[0].type = ACPI_TYPE_INTEGER;
	105	apts_if_args[0].integer.value = 1;
	106	apts_if_args[1].type = ACPI_TYPE_INTEGER;
	107	apts_if_args[1].integer.value = state_index;
	108	apts_if_args[2].type = ACPI_TYPE_INTEGER;
	109	apts_if_args[2].integer.value = 0;
	110
	111	status = acpi_evaluate_object(ahandle, "APTS", &apts_if_arg_list, &buffer);
	112	if (ACPI_FAILURE(status)) {
	113	dev_err(pdev->dev, "APTS state_idx:%u call failed\n", state_index);
	114	kfree(buffer.pointer);
	115	return NULL;
	116	}
	117
	118	return buffer.pointer;
	119	}
	120
	121	static int apts_if_call_store_buffer(struct amd_pmf_dev *pdev,
	122	u32 index, void *data, size_t out_sz)
	123	{
	124	union acpi_object *info;
	125	size_t size;
	126	int err = 0;
	127
	128	info = apts_if_call(pdev, index);
	129	if (!info)
	130	return -EIO;
	131
	132	if (info->type != ACPI_TYPE_BUFFER) {
	133	dev_err(pdev->dev, "object is not a buffer\n");
	134	err = -EINVAL;
	135	goto out;
	136	}
	137
	138	size = (u16 )info->buffer.pointer;
	139	if (info->buffer.length < size) {
	140	dev_err(pdev->dev, "buffer smaller than header size %u < %zu\n",
	141	info->buffer.length, size);
	142	err = -EINVAL;
	143	goto out;
	144	}
	145
	146	if (size < out_sz) {
	147	dev_err(pdev->dev, "buffer too small %zu\n", size);
	148	err = -EINVAL;
	149	goto out;
	150	}
	151
	152	memcpy(data, info->buffer.pointer, out_sz);
	153	out:
	154	kfree(info);
	155	return err;
	156	}
157
5eb315eb SS	158	int is_apmf_func_supported(struct amd_pmf_dev *pdev, unsigned long index)
	159	{
	160	/* If bit-n is set, that indicates function n+1 is supported */
	161	return !!(pdev->supported_func & BIT(index - 1));
	162	}
	163
3eecb434 SS	164	int apts_get_static_slider_granular_v2(struct amd_pmf_dev *pdev,
	165	struct amd_pmf_apts_granular_output *data, u32 apts_idx)
	166	{
	167	if (!is_apmf_func_supported(pdev, APMF_FUNC_STATIC_SLIDER_GRANULAR))
	168	return -EINVAL;
	169
	170	return apts_if_call_store_buffer(pdev, apts_idx, data, sizeof(*data));
	171	}
	172
48d38f56 SS	173	int apmf_get_static_slider_granular_v2(struct amd_pmf_dev *pdev,
	174	struct apmf_static_slider_granular_output_v2 *data)
	175	{
	176	if (!is_apmf_func_supported(pdev, APMF_FUNC_STATIC_SLIDER_GRANULAR))
	177	return -EINVAL;
	178
	179	return apmf_if_call_store_buffer(pdev, APMF_FUNC_STATIC_SLIDER_GRANULAR,
	180	data, sizeof(*data));
	181	}
	182
4c71ae41 SS	183	int apmf_get_static_slider_granular(struct amd_pmf_dev *pdev,
	184	struct apmf_static_slider_granular_output *data)
	185	{
	186	if (!is_apmf_func_supported(pdev, APMF_FUNC_STATIC_SLIDER_GRANULAR))
	187	return -EINVAL;
	188
	189	return apmf_if_call_store_buffer(pdev, APMF_FUNC_STATIC_SLIDER_GRANULAR,
	190	data, sizeof(*data));
	191	}
	192
33c9ab5b SS	193	int apmf_os_power_slider_update(struct amd_pmf_dev *pdev, u8 event)
	194	{
	195	struct os_power_slider args;
	196	struct acpi_buffer params;
	197	union acpi_object *info;
33c9ab5b SS	198
	199	args.size = sizeof(args);
	200	args.slider_event = event;
	201
	202	params.length = sizeof(args);
	203	params.pointer = (void *)&args;
	204
	205	info = apmf_if_call(pdev, APMF_FUNC_OS_POWER_SLIDER_UPDATE, &params);
	206	if (!info)
4527898e	207	return -EIO;
33c9ab5b SS	208
33c9ab5b SS	209	kfree(info);
4527898e	210	return 0;
33c9ab5b SS	211	}
33c9ab5b SS	212
b9ab888b SS	213	static void apmf_sbios_heartbeat_notify(struct work_struct *work)
	214	{
	215	struct amd_pmf_dev *dev = container_of(work, struct amd_pmf_dev, heart_beat.work);
	216	union acpi_object *info;
	217
	218	dev_dbg(dev->dev, "Sending heartbeat to SBIOS\n");
	219	info = apmf_if_call(dev, APMF_FUNC_SBIOS_HEARTBEAT, NULL);
	220	if (!info)
9dd3f1ef	221	return;
b9ab888b SS	222
b9ab888b SS	223	schedule_delayed_work(&dev->heart_beat, msecs_to_jiffies(dev->hb_interval * 1000));
b9ab888b SS	224	kfree(info);
	225	}
	226
6262938e SS	227	int amd_pmf_notify_sbios_heartbeat_event_v2(struct amd_pmf_dev *dev, u8 flag)
	228	{
	229	struct sbios_hb_event_v2 args = { };
	230	struct acpi_buffer params;
	231	union acpi_object *info;
	232
	233	args.size = sizeof(args);
	234
	235	switch (flag) {
	236	case ON_LOAD:
	237	args.load = 1;
	238	break;
	239	case ON_UNLOAD:
	240	args.unload = 1;
	241	break;
	242	case ON_SUSPEND:
	243	args.suspend = 1;
	244	break;
	245	case ON_RESUME:
	246	args.resume = 1;
	247	break;
	248	default:
	249	dev_dbg(dev->dev, "Failed to send v2 heartbeat event, flag:0x%x\n", flag);
	250	return -EINVAL;
	251	}
	252
	253	params.length = sizeof(args);
	254	params.pointer = &args;
	255
	256	info = apmf_if_call(dev, APMF_FUNC_SBIOS_HEARTBEAT_V2, &params);
	257	if (!info)
	258	return -EIO;
	259
	260	kfree(info);
	261	return 0;
	262	}
	263
a3281ec5 SS	264	int apmf_update_fan_idx(struct amd_pmf_dev *pdev, bool manual, u32 idx)
	265	{
	266	union acpi_object *info;
	267	struct apmf_fan_idx args;
	268	struct acpi_buffer params;
a3281ec5 SS	269
	270	args.size = sizeof(args);
	271	args.fan_ctl_mode = manual;
	272	args.fan_ctl_idx = idx;
	273
	274	params.length = sizeof(args);
	275	params.pointer = (void *)&args;
	276
	277	info = apmf_if_call(pdev, APMF_FUNC_SET_FAN_IDX, &params);
4527898e ME	278	if (!info)
4527898e ME	279	return -EIO;
a3281ec5	280
a3281ec5	281	kfree(info);
4527898e	282	return 0;
a3281ec5 SS	283	}
a3281ec5 SS	284
3f5571d9 SS	285	int apmf_get_auto_mode_def(struct amd_pmf_dev pdev, struct apmf_auto_mode data)
	286	{
	287	return apmf_if_call_store_buffer(pdev, APMF_FUNC_AUTO_MODE, data, sizeof(*data));
	288	}
	289
5fdc8b82 SS	290	int apmf_get_sbios_requests_v2(struct amd_pmf_dev pdev, struct apmf_sbios_req_v2 req)
	291	{
	292	return apmf_if_call_store_buffer(pdev, APMF_FUNC_SBIOS_REQUESTS, req, sizeof(*req));
	293	}
	294
7d77dcc8 SS	295	int apmf_get_sbios_requests(struct amd_pmf_dev pdev, struct apmf_sbios_req req)
	296	{
	297	return apmf_if_call_store_buffer(pdev, APMF_FUNC_SBIOS_REQUESTS,
	298	req, sizeof(*req));
	299	}
	300
	301	static void apmf_event_handler(acpi_handle handle, u32 event, void *data)
	302	{
	303	struct amd_pmf_dev *pmf_dev = data;
	304	struct apmf_sbios_req req;
	305	int ret;
	306
	307	mutex_lock(&pmf_dev->update_mutex);
	308	ret = apmf_get_sbios_requests(pmf_dev, &req);
	309	if (ret) {
	310	dev_err(pmf_dev->dev, "Failed to get SBIOS requests:%d\n", ret);
	311	goto out;
	312	}
	313
	314	if (req.pending_req & BIT(APMF_AMT_NOTIFICATION)) {
	315	dev_dbg(pmf_dev->dev, "AMT is supported and notifications %s\n",
	316	req.amt_event ? "Enabled" : "Disabled");
	317	pmf_dev->amt_enabled = !!req.amt_event;
	318
	319	if (pmf_dev->amt_enabled)
	320	amd_pmf_handle_amt(pmf_dev);
	321	else
	322	amd_pmf_reset_amt(pmf_dev);
	323	}
	324
	325	if (req.pending_req & BIT(APMF_CQL_NOTIFICATION)) {
	326	dev_dbg(pmf_dev->dev, "CQL is supported and notifications %s\n",
	327	req.cql_event ? "Enabled" : "Disabled");
	328
	329	/* update the target mode information */
	330	if (pmf_dev->amt_enabled)
	331	amd_pmf_update_2_cql(pmf_dev, req.cql_event);
	332	}
	333	out:
	334	mutex_unlock(&pmf_dev->update_mutex);
	335	}
	336
5eb315eb SS	337	static int apmf_if_verify_interface(struct amd_pmf_dev *pdev)
	338	{
	339	struct apmf_verify_interface output;
	340	int err;
	341
	342	err = apmf_if_call_store_buffer(pdev, APMF_FUNC_VERIFY_INTERFACE, &output, sizeof(output));
	343	if (err)
	344	return err;
	345
ed13f622 ML	346	/* only set if not already set by a quirk */
	347	if (!pdev->supported_func)
	348	pdev->supported_func = output.supported_functions;
	349
a33e9e10 SS	350	dev_dbg(pdev->dev, "supported functions:0x%x notifications:0x%x version:%u\n",
	351	output.supported_functions, output.notification_mask, output.version);
	352
	353	pdev->pmf_if_version = output.version;
5eb315eb SS	354
	355	return 0;
	356	}
	357
	358	static int apmf_get_system_params(struct amd_pmf_dev *dev)
	359	{
	360	struct apmf_system_params params;
	361	int err;
	362
	363	if (!is_apmf_func_supported(dev, APMF_FUNC_GET_SYS_PARAMS))
	364	return -EINVAL;
	365
	366	err = apmf_if_call_store_buffer(dev, APMF_FUNC_GET_SYS_PARAMS, &params, sizeof(params));
	367	if (err)
	368	return err;
	369
b9ab888b	370	dev_dbg(dev->dev, "system params mask:0x%x flags:0x%x cmd_code:0x%x heartbeat:%d\n",
5eb315eb SS	371	params.valid_mask,
5eb315eb SS	372	params.flags,
b9ab888b SS	373	params.command_code,
b9ab888b SS	374	params.heartbeat_int);
5eb315eb	375	params.flags = params.flags & params.valid_mask;
b9ab888b	376	dev->hb_interval = params.heartbeat_int;
5eb315eb SS	377
	378	return 0;
	379	}
	380
1738061c SS	381	int apmf_get_dyn_slider_def_ac(struct amd_pmf_dev pdev, struct apmf_dyn_slider_output data)
	382	{
	383	return apmf_if_call_store_buffer(pdev, APMF_FUNC_DYN_SLIDER_AC, data, sizeof(*data));
	384	}
	385
	386	int apmf_get_dyn_slider_def_dc(struct amd_pmf_dev pdev, struct apmf_dyn_slider_output data)
	387	{
	388	return apmf_if_call_store_buffer(pdev, APMF_FUNC_DYN_SLIDER_DC, data, sizeof(*data));
	389	}
	390
22ee98cb SS	391	int apmf_install_handler(struct amd_pmf_dev *pmf_dev)
	392	{
	393	acpi_handle ahandle = ACPI_HANDLE(pmf_dev->dev);
	394	acpi_status status;
	395
	396	/* Install the APMF Notify handler */
	397	if (is_apmf_func_supported(pmf_dev, APMF_FUNC_AUTO_MODE) &&
	398	is_apmf_func_supported(pmf_dev, APMF_FUNC_SBIOS_REQUESTS)) {
	399	status = acpi_install_notify_handler(ahandle, ACPI_ALL_NOTIFY,
	400	apmf_event_handler, pmf_dev);
	401	if (ACPI_FAILURE(status)) {
	402	dev_err(pmf_dev->dev, "failed to install notify handler\n");
	403	return -ENODEV;
	404	}
	405
	406	/* Call the handler once manually to catch up with possibly missed notifies. */
	407	apmf_event_handler(ahandle, 0, pmf_dev);
	408	}
	409
	410	return 0;
	411	}
	412
7c45534a SS	413	static acpi_status apmf_walk_resources(struct acpi_resource res, void data)
	414	{
	415	struct amd_pmf_dev *dev = data;
	416
	417	switch (res->type) {
	418	case ACPI_RESOURCE_TYPE_ADDRESS64:
	419	dev->policy_addr = res->data.address64.address.minimum;
	420	dev->policy_sz = res->data.address64.address.address_length;
	421	break;
	422	case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
	423	dev->policy_addr = res->data.fixed_memory32.address;
	424	dev->policy_sz = res->data.fixed_memory32.address_length;
	425	break;
	426	}
	427
	428	if (!dev->policy_addr \|\| dev->policy_sz > POLICY_BUF_MAX_SZ \|\| dev->policy_sz == 0) {
	429	pr_err("Incorrect Policy params, possibly a SBIOS bug\n");
	430	return AE_ERROR;
	431	}
	432
	433	return AE_OK;
	434	}
	435
	436	int apmf_check_smart_pc(struct amd_pmf_dev *pmf_dev)
	437	{
	438	acpi_handle ahandle = ACPI_HANDLE(pmf_dev->dev);
	439	acpi_status status;
	440
	441	status = acpi_walk_resources(ahandle, METHOD_NAME__CRS, apmf_walk_resources, pmf_dev);
	442	if (ACPI_FAILURE(status)) {
03cea821	443	dev_dbg(pmf_dev->dev, "acpi_walk_resources failed :%d\n", status);
7c45534a SS	444	return -EINVAL;
	445	}
	446
	447	return 0;
	448	}
	449
b9ab888b SS	450	void apmf_acpi_deinit(struct amd_pmf_dev *pmf_dev)
b9ab888b SS	451	{
7d77dcc8 SS	452	acpi_handle ahandle = ACPI_HANDLE(pmf_dev->dev);
7d77dcc8 SS	453
6262938e	454	if (pmf_dev->hb_interval && pmf_dev->pmf_if_version == PMF_IF_V1)
b9ab888b	455	cancel_delayed_work_sync(&pmf_dev->heart_beat);
7d77dcc8 SS	456
	457	if (is_apmf_func_supported(pmf_dev, APMF_FUNC_AUTO_MODE) &&
	458	is_apmf_func_supported(pmf_dev, APMF_FUNC_SBIOS_REQUESTS))
	459	acpi_remove_notify_handler(ahandle, ACPI_ALL_NOTIFY, apmf_event_handler);
b9ab888b SS	460	}
b9ab888b SS	461
5eb315eb SS	462	int apmf_acpi_init(struct amd_pmf_dev *pmf_dev)
	463	{
	464	int ret;
	465
	466	ret = apmf_if_verify_interface(pmf_dev);
	467	if (ret) {
	468	dev_err(pmf_dev->dev, "APMF verify interface failed :%d\n", ret);
	469	goto out;
	470	}
	471
	472	ret = apmf_get_system_params(pmf_dev);
	473	if (ret) {
839e90e7	474	dev_dbg(pmf_dev->dev, "APMF apmf_get_system_params failed :%d\n", ret);
5eb315eb SS	475	goto out;
	476	}
	477
6262938e	478	if (pmf_dev->hb_interval && pmf_dev->pmf_if_version == PMF_IF_V1) {
b9ab888b SS	479	/* send heartbeats only if the interval is not zero */
	480	INIT_DELAYED_WORK(&pmf_dev->heart_beat, apmf_sbios_heartbeat_notify);
	481	schedule_delayed_work(&pmf_dev->heart_beat, 0);
	482	}
	483
5eb315eb SS	484	out:
	485	return ret;
	486	}