1 files changed, 343 insertions, 0 deletions

diff --git a/drivers/platform/x86/amd/pmf/spc.c b/drivers/platform/x86/amd/pmf/spc.c
new file mode 100644
index 000000000000..0a37dc6a7950
--- /dev/null
+++ b/drivers/platform/x86/amd/pmf/spc.c
@@ -0,0 +1,343 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * AMD Platform Management Framework Driver - Smart PC Capabilities
+ *
+ * Copyright (c) 2023, Advanced Micro Devices, Inc.
+ * All Rights Reserved.
+ *
+ * Authors: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
+ *          Patil Rajesh Reddy <Patil.Reddy@amd.com>
+ */
+
+#include <acpi/button.h>
+#include <linux/amd-pmf-io.h>
+#include <linux/power_supply.h>
+#include <linux/units.h>
+#include "pmf.h"
+
+#ifdef CONFIG_AMD_PMF_DEBUG
+static const char *platform_type_as_str(u16 platform_type)
+{
+	switch (platform_type) {
+	case CLAMSHELL:
+		return "CLAMSHELL";
+	case FLAT:
+		return "FLAT";
+	case TENT:
+		return "TENT";
+	case STAND:
+		return "STAND";
+	case TABLET:
+		return "TABLET";
+	case BOOK:
+		return "BOOK";
+	case PRESENTATION:
+		return "PRESENTATION";
+	case PULL_FWD:
+		return "PULL_FWD";
+	default:
+		return "UNKNOWN";
+	}
+}
+
+static const char *laptop_placement_as_str(u16 device_state)
+{
+	switch (device_state) {
+	case ON_TABLE:
+		return "ON_TABLE";
+	case ON_LAP_MOTION:
+		return "ON_LAP_MOTION";
+	case IN_BAG:
+		return "IN_BAG";
+	case OUT_OF_BAG:
+		return "OUT_OF_BAG";
+	default:
+		return "UNKNOWN";
+	}
+}
+
+static const char *ta_slider_as_str(unsigned int state)
+{
+	switch (state) {
+	case TA_BEST_PERFORMANCE:
+		return "PERFORMANCE";
+	case TA_BETTER_PERFORMANCE:
+		return "BALANCED";
+	case TA_BEST_BATTERY:
+		return "POWER_SAVER";
+	default:
+		return "Unknown TA Slider State";
+	}
+}
+
+static u32 amd_pmf_get_ta_custom_bios_inputs(struct ta_pmf_enact_table *in, int index)
+{
+	switch (index) {
+	case 0 ... 1:
+		return in->ev_info.bios_input_1[index];
+	case 2 ... 9:
+		return in->ev_info.bios_input_2[index - 2];
+	default:
+		return 0;
+	}
+}
+
+void amd_pmf_dump_ta_inputs(struct amd_pmf_dev *dev, struct ta_pmf_enact_table *in)
+{
+	int i;
+
+	dev_dbg(dev->dev, "==== TA inputs START ====\n");
+	dev_dbg(dev->dev, "Slider State: %s\n", ta_slider_as_str(in->ev_info.power_slider));
+	dev_dbg(dev->dev, "Power Source: %s\n", amd_pmf_source_as_str(in->ev_info.power_source));
+	dev_dbg(dev->dev, "Battery Percentage: %u\n", in->ev_info.bat_percentage);
+	dev_dbg(dev->dev, "Designed Battery Capacity: %u\n", in->ev_info.bat_design);
+	dev_dbg(dev->dev, "Fully Charged Capacity: %u\n", in->ev_info.full_charge_capacity);
+	dev_dbg(dev->dev, "Drain Rate: %d\n", in->ev_info.drain_rate);
+	dev_dbg(dev->dev, "Socket Power: %u\n", in->ev_info.socket_power);
+	dev_dbg(dev->dev, "Skin Temperature: %u\n", in->ev_info.skin_temperature);
+	dev_dbg(dev->dev, "Avg C0 Residency: %u\n", in->ev_info.avg_c0residency);
+	dev_dbg(dev->dev, "Max C0 Residency: %u\n", in->ev_info.max_c0residency);
+	dev_dbg(dev->dev, "GFX Busy: %u\n", in->ev_info.gfx_busy);
+	dev_dbg(dev->dev, "LID State: %s\n", in->ev_info.lid_state ? "close" : "open");
+	dev_dbg(dev->dev, "User Presence: %s\n", in->ev_info.user_present ? "Present" : "Away");
+	dev_dbg(dev->dev, "Ambient Light: %d\n", in->ev_info.ambient_light);
+	dev_dbg(dev->dev, "Platform type: %s\n", platform_type_as_str(in->ev_info.platform_type));
+	dev_dbg(dev->dev, "Laptop placement: %s\n",
+		laptop_placement_as_str(in->ev_info.device_state));
+	for (i = 0; i < ARRAY_SIZE(custom_bios_inputs); i++)
+		dev_dbg(dev->dev, "Custom BIOS input%d: %u\n", i + 1,
+			amd_pmf_get_ta_custom_bios_inputs(in, i));
+	dev_dbg(dev->dev, "==== TA inputs END ====\n");
+}
+#else
+void amd_pmf_dump_ta_inputs(struct amd_pmf_dev *dev, struct ta_pmf_enact_table *in) {}
+#endif
+
+/*
+ * This helper function sets the appropriate BIOS input value in the TA enact
+ * table based on the provided index. We need this approach because the custom
+ * BIOS input array is not continuous, due to the existing TA structure layout.
+ */
+static void amd_pmf_set_ta_custom_bios_input(struct ta_pmf_enact_table *in, int index, u32 value)
+{
+	switch (index) {
+	case 0 ... 1:
+		in->ev_info.bios_input_1[index] = value;
+		break;
+	case 2 ... 9:
+		in->ev_info.bios_input_2[index - 2] = value;
+		break;
+	default:
+		return;
+	}
+}
+
+static void amd_pmf_update_bios_inputs(struct amd_pmf_dev *pdev, u32 pending_req,
+				       const struct amd_pmf_pb_bitmap *inputs,
+				       const u32 *custom_policy, struct ta_pmf_enact_table *in)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(custom_bios_inputs); i++) {
+		if (!(pending_req & inputs[i].bit_mask))
+			continue;
+		amd_pmf_set_ta_custom_bios_input(in, i, custom_policy[i]);
+		pdev->cb_prev.custom_bios_inputs[i] = custom_policy[i];
+		dev_dbg(pdev->dev, "Custom BIOS Input[%d]: %u\n", i, custom_policy[i]);
+	}
+}
+
+static void amd_pmf_get_custom_bios_inputs(struct amd_pmf_dev *pdev,
+					   struct ta_pmf_enact_table *in)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(custom_bios_inputs); i++)
+		amd_pmf_set_ta_custom_bios_input(in, i, pdev->cb_prev.custom_bios_inputs[i]);
+
+	if (!(pdev->req.pending_req || pdev->req1.pending_req))
+		return;
+
+	if (!pdev->smart_pc_enabled)
+		return;
+
+	switch (pdev->pmf_if_version) {
+	case PMF_IF_V1:
+		if (!is_apmf_bios_input_notifications_supported(pdev))
+			return;
+		amd_pmf_update_bios_inputs(pdev, pdev->req1.pending_req, custom_bios_inputs_v1,
+					   pdev->req1.custom_policy, in);
+		break;
+	case PMF_IF_V2:
+		amd_pmf_update_bios_inputs(pdev, pdev->req.pending_req, custom_bios_inputs,
+					   pdev->req.custom_policy, in);
+		break;
+	default:
+		break;
+	}
+
+	/* Clear pending requests after handling */
+	memset(&pdev->req, 0, sizeof(pdev->req));
+	memset(&pdev->req1, 0, sizeof(pdev->req1));
+}
+
+static void amd_pmf_get_c0_residency(u16 *core_res, size_t size, struct ta_pmf_enact_table *in)
+{
+	u16 max, avg = 0;
+	int i;
+
+	/* Get the avg and max C0 residency of all the cores */
+	max = *core_res;
+	for (i = 0; i < size; i++) {
+		avg += core_res[i];
+		if (core_res[i] > max)
+			max = core_res[i];
+	}
+	avg = DIV_ROUND_CLOSEST(avg, size);
+	in->ev_info.avg_c0residency = avg;
+	in->ev_info.max_c0residency = max;
+}
+
+static void amd_pmf_get_smu_info(struct amd_pmf_dev *dev, struct ta_pmf_enact_table *in)
+{
+	/* Get the updated metrics table data */
+	memset(dev->buf, 0, dev->mtable_size);
+	amd_pmf_send_cmd(dev, SET_TRANSFER_TABLE, SET_CMD, METRICS_TABLE_ID, NULL);
+
+	switch (dev->cpu_id) {
+	case AMD_CPU_ID_PS:
+		memcpy(&dev->m_table, dev->buf, dev->mtable_size);
+		in->ev_info.socket_power = dev->m_table.apu_power + dev->m_table.dgpu_power;
+		in->ev_info.skin_temperature = dev->m_table.skin_temp;
+		in->ev_info.gfx_busy = dev->m_table.avg_gfx_activity;
+		amd_pmf_get_c0_residency(dev->m_table.avg_core_c0residency,
+					 ARRAY_SIZE(dev->m_table.avg_core_c0residency), in);
+		break;
+	case PCI_DEVICE_ID_AMD_1AH_M20H_ROOT:
+	case PCI_DEVICE_ID_AMD_1AH_M60H_ROOT:
+		memcpy(&dev->m_table_v2, dev->buf, dev->mtable_size);
+		in->ev_info.socket_power = dev->m_table_v2.apu_power + dev->m_table_v2.dgpu_power;
+		in->ev_info.skin_temperature = dev->m_table_v2.skin_temp;
+		in->ev_info.gfx_busy = dev->m_table_v2.gfx_activity;
+		amd_pmf_get_c0_residency(dev->m_table_v2.core_c0residency,
+					 ARRAY_SIZE(dev->m_table_v2.core_c0residency), in);
+		break;
+	default:
+		dev_err(dev->dev, "Unsupported CPU id: 0x%x", dev->cpu_id);
+	}
+}
+
+static const char * const pmf_battery_supply_name[] = {
+	"BATT",
+	"BAT0",
+};
+
+static int amd_pmf_get_battery_prop(enum power_supply_property prop)
+{
+	union power_supply_propval value;
+	struct power_supply *psy;
+	int i, ret;
+
+	for (i = 0; i < ARRAY_SIZE(pmf_battery_supply_name); i++) {
+		psy = power_supply_get_by_name(pmf_battery_supply_name[i]);
+		if (!psy)
+			continue;
+
+		ret = power_supply_get_property(psy, prop, &value);
+		if (ret) {
+			power_supply_put(psy);
+			return ret;
+		}
+	}
+
+	return value.intval;
+}
+
+static int amd_pmf_get_battery_info(struct amd_pmf_dev *dev, struct ta_pmf_enact_table *in)
+{
+	int val;
+
+	val = amd_pmf_get_battery_prop(POWER_SUPPLY_PROP_PRESENT);
+	if (val < 0)
+		return val;
+	if (val != 1)
+		return -ENODEV;
+
+	in->ev_info.bat_percentage = amd_pmf_get_battery_prop(POWER_SUPPLY_PROP_CAPACITY);
+	/* all values in mWh metrics */
+	in->ev_info.bat_design = amd_pmf_get_battery_prop(POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN) /
+		MILLIWATT_PER_WATT;
+	in->ev_info.full_charge_capacity = amd_pmf_get_battery_prop(POWER_SUPPLY_PROP_ENERGY_FULL) /
+		MILLIWATT_PER_WATT;
+	in->ev_info.drain_rate = amd_pmf_get_battery_prop(POWER_SUPPLY_PROP_POWER_NOW) /
+		MILLIWATT_PER_WATT;
+
+	return 0;
+}
+
+static int amd_pmf_get_slider_info(struct amd_pmf_dev *dev, struct ta_pmf_enact_table *in)
+{
+	int val;
+
+	switch (dev->current_profile) {
+	case PLATFORM_PROFILE_PERFORMANCE:
+	case PLATFORM_PROFILE_BALANCED_PERFORMANCE:
+		val = TA_BEST_PERFORMANCE;
+		break;
+	case PLATFORM_PROFILE_BALANCED:
+		val = TA_BETTER_PERFORMANCE;
+		break;
+	case PLATFORM_PROFILE_LOW_POWER:
+	case PLATFORM_PROFILE_QUIET:
+		val = TA_BEST_BATTERY;
+		break;
+	default:
+		dev_err(dev->dev, "Unknown Platform Profile.\n");
+		return -EOPNOTSUPP;
+	}
+	in->ev_info.power_slider = val;
+
+	return 0;
+}
+
+static void amd_pmf_get_sensor_info(struct amd_pmf_dev *dev, struct ta_pmf_enact_table *in)
+{
+	struct amd_sfh_info sfh_info;
+
+	/* Get the latest information from SFH */
+	in->ev_info.user_present = false;
+
+	/* Get ALS data */
+	if (!amd_get_sfh_info(&sfh_info, MT_ALS))
+		in->ev_info.ambient_light = sfh_info.ambient_light;
+	else
+		dev_dbg(dev->dev, "ALS is not enabled/detected\n");
+
+	/* get HPD data */
+	if (!amd_get_sfh_info(&sfh_info, MT_HPD)) {
+		if (sfh_info.user_present == SFH_USER_PRESENT)
+			in->ev_info.user_present = true;
+	} else {
+		dev_dbg(dev->dev, "HPD is not enabled/detected\n");
+	}
+
+	/* Get SRA (Secondary Accelerometer) data */
+	if (!amd_get_sfh_info(&sfh_info, MT_SRA)) {
+		in->ev_info.platform_type = sfh_info.platform_type;
+		in->ev_info.device_state = sfh_info.laptop_placement;
+	} else {
+		dev_dbg(dev->dev, "SRA is not enabled/detected\n");
+	}
+}
+
+void amd_pmf_populate_ta_inputs(struct amd_pmf_dev *dev, struct ta_pmf_enact_table *in)
+{
+	/* TA side lid open is 1 and close is 0, hence the ! here */
+	in->ev_info.lid_state = !acpi_lid_open();
+	in->ev_info.power_source = amd_pmf_get_power_source();
+	amd_pmf_get_smu_info(dev, in);
+	amd_pmf_get_battery_info(dev, in);
+	amd_pmf_get_slider_info(dev, in);
+	amd_pmf_get_sensor_info(dev, in);
+	amd_pmf_get_custom_bios_inputs(dev, in);
+}