SPS (a.k.a. Static Power Slider) gives a feel of Windows performance
power slider for the Linux users, where the user selects a certain
mode (like "balanced", "low-power" or "performance") and the thermals
associated with each selected mode gets applied from the silicon
side via the mailboxes defined through PMFW.
PMF driver hooks to platform_profile by reading the PMF ACPI fn9 to
see if the support is being advertised by ACPI interface.
If supported, the PMF driver reacts to platform_profile selection choices
made by the user and adjust the system thermal behavior.
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@xxxxxxx>
---
drivers/platform/x86/amd/pmf/Makefile | 2 +-
drivers/platform/x86/amd/pmf/acpi.c | 8 ++
drivers/platform/x86/amd/pmf/core.c | 26 +++++
drivers/platform/x86/amd/pmf/pmf.h | 64 +++++++++++
drivers/platform/x86/amd/pmf/sps.c | 152 ++++++++++++++++++++++++++
5 files changed, 251 insertions(+), 1 deletion(-)
create mode 100644 drivers/platform/x86/amd/pmf/sps.c
diff --git a/drivers/platform/x86/amd/pmf/Makefile b/drivers/platform/x86/amd/pmf/Makefile
index 2617eba773ce..557521a80427 100644
--- a/drivers/platform/x86/amd/pmf/Makefile
+++ b/drivers/platform/x86/amd/pmf/Makefile
@@ -5,4 +5,4 @@
#
obj-$(CONFIG_AMD_PMF) += amd-pmf.o
-amd-pmf-objs := core.o acpi.o
+amd-pmf-objs := core.o acpi.o sps.o
diff --git a/drivers/platform/x86/amd/pmf/acpi.c b/drivers/platform/x86/amd/pmf/acpi.c
index bd796d7e1d96..41abd8680d8d 100644
--- a/drivers/platform/x86/amd/pmf/acpi.c
+++ b/drivers/platform/x86/amd/pmf/acpi.c
@@ -98,6 +98,7 @@ static int apmf_if_call_store_buffer(struct apmf_if *apmf_if, int func, void *de
static void apmf_if_parse_functions(struct apmf_if_functions *func, u32 mask)
{
func->system_params = mask & APMF_FUNC_GET_SYS_PARAMS;
+ func->static_slider_granular = mask & APMF_FUNC_STATIC_SLIDER_GRANULAR;
}
int is_apmf_func_supported(unsigned long index)
@@ -106,6 +107,13 @@ int is_apmf_func_supported(unsigned long index)
return ((supported_func & (1 << (index - 1))) != 0);
}
+int apmf_get_static_slider_granular(struct apmf_if *apmf_if,
+ struct apmf_static_slider_granular_output *data)
+{
+ return apmf_if_call_store_buffer(apmf_if, APMF_FUNC_STATIC_SLIDER_GRANULAR,
+ data, sizeof(*data));
+}
+
static int apmf_if_verify_interface(struct amd_pmf_dev *pdev, struct apmf_if *apmf_if)
{
struct apmf_verify_interface output;
diff --git a/drivers/platform/x86/amd/pmf/core.c b/drivers/platform/x86/amd/pmf/core.c
index c5002b7bb904..b6006e8ee1a1 100644
--- a/drivers/platform/x86/amd/pmf/core.c
+++ b/drivers/platform/x86/amd/pmf/core.c
@@ -12,6 +12,7 @@
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
+#include <linux/power_supply.h>
#include "pmf.h"
/* PMF-SMU communication registers */
@@ -45,6 +46,14 @@
#define DELAY_MIN_US 2000
#define DELAY_MAX_US 3000
+int amd_pmf_get_power_source(void)
+{
+ if (power_supply_is_system_supplied() > 0)
+ return POWER_SOURCE_AC;
+ else
+ return POWER_SOURCE_DC;
+}
+
static inline u32 amd_pmf_reg_read(struct amd_pmf_dev *dev, int reg_offset)
{
return ioread32(dev->regbase + reg_offset);
@@ -138,6 +147,21 @@ static const struct pci_device_id pmf_pci_ids[] = {
{ }
};
+static void amd_pmf_init_features(struct amd_pmf_dev *dev)
+{
+ /* Enable Static Slider */
+ if (is_apmf_func_supported(APMF_FUNC_STATIC_SLIDER_GRANULAR)) {
+ amd_pmf_init_sps(dev);
+ dev_dbg(dev->dev, "SPS enabled and Platform Profiles registered\n");
+ }
+}
+
+static void amd_pmf_deinit_features(struct amd_pmf_dev *dev)
+{
+ if (is_apmf_func_supported(APMF_FUNC_STATIC_SLIDER_GRANULAR))
+ amd_pmf_deinit_sps(dev);
+}
+
static const struct acpi_device_id amd_pmf_acpi_ids[] = {
{"AMDI0102", 0},
{ }
@@ -206,6 +230,7 @@ static int amd_pmf_probe(struct platform_device *pdev)
apmf_acpi_init(dev);
platform_set_drvdata(pdev, dev);
+ amd_pmf_init_features(dev);
mutex_init(&dev->lock);
dev_info(dev->dev, "registered PMF device successfully\n");
@@ -218,6 +243,7 @@ static int amd_pmf_remove(struct platform_device *pdev)
struct amd_pmf_dev *dev = platform_get_drvdata(pdev);
mutex_destroy(&dev->lock);
+ amd_pmf_deinit_features(dev);
kfree(dev->buf);
return 0;
}
diff --git a/drivers/platform/x86/amd/pmf/pmf.h b/drivers/platform/x86/amd/pmf/pmf.h
index 08c6bc0e2b42..30740a5cd30d 100644
--- a/drivers/platform/x86/amd/pmf/pmf.h
+++ b/drivers/platform/x86/amd/pmf/pmf.h
@@ -12,10 +12,12 @@
#define PMF_H
#include <linux/acpi.h>
+#include <linux/platform_profile.h>
/* APMF Functions */
#define APMF_FUNC_VERIFY_INTERFACE 0
#define APMF_FUNC_GET_SYS_PARAMS 1
+#define APMF_FUNC_STATIC_SLIDER_GRANULAR 9
/* Message Definitions */
#define SET_SPL 0x03 /* SPL: Sustained Power Limit */
@@ -36,9 +38,12 @@
#define GET_STT_LIMIT_APU 0x20
#define GET_STT_LIMIT_HS2 0x21
+#define ARG_NONE 0
+
/* AMD PMF BIOS interfaces */
struct apmf_if_functions {
bool system_params;
+ bool static_slider_granular;
};
struct apmf_if {
@@ -60,6 +65,30 @@ struct apmf_system_params {
u8 command_code;
} __packed;
+enum amd_stt_skin_temp {
+ STT_TEMP_APU,
+ STT_TEMP_HS2,
+ STT_TEMP_COUNT,
+};
+
+enum amd_slider_op {
+ SLIDER_OP_GET,
+ SLIDER_OP_SET,
+};
+
+enum power_source {
+ POWER_SOURCE_AC,
+ POWER_SOURCE_DC,
+ POWER_SOURCE_MAX,
+};
+
+enum power_modes {
+ POWER_MODE_PERFORMANCE,
+ POWER_MODE_BALANCED_POWER,
+ POWER_MODE_POWER_SAVER,
+ POWER_MODE_MAX,
+};
+
struct amd_pmf_dev {
void __iomem *regbase;
void __iomem *smu_virt_addr;
@@ -68,11 +97,46 @@ struct amd_pmf_dev {
u32 cpu_id;
struct device *dev;
struct apmf_if *apmf_if;
+ enum platform_profile_option current_profile;
+ struct platform_profile_handler pprof;
struct mutex lock; /* protects the PMF interface */
};
+struct apmf_sps_prop_granular {
+ u32 fppt;
+ u32 sppt;
+ u32 sppt_apu_only;
+ u32 spl;
+ u32 stt_min;
+ u8 stt_skin_temp[STT_TEMP_COUNT];
+ u32 fan_id;
+} __packed;
+
+/* Static Slider */
+struct apmf_static_slider_granular_output {
+ u16 size;
+ struct apmf_sps_prop_granular prop[POWER_SOURCE_MAX * POWER_MODE_MAX];
+} __packed;
+
+struct amd_pmf_static_slider_granular {
+ u16 size;
+ struct apmf_sps_prop_granular prop[POWER_SOURCE_MAX][POWER_MODE_MAX];
+};
+
/* Core Layer */
int apmf_acpi_init(struct amd_pmf_dev *pmf_dev);
+int is_apmf_func_supported(unsigned long index);
int amd_pmf_send_cmd(struct amd_pmf_dev *dev, u8 message, bool get, u32 arg, u32 *data);
+int amd_pmf_get_power_source(void);
+
+/* SPS Layer */
+u8 amd_pmf_get_pprof_modes(struct amd_pmf_dev *pmf);
+void amd_pmf_update_slider(struct amd_pmf_dev *dev, bool op, int idx,
+ struct amd_pmf_static_slider_granular *table);
+int amd_pmf_init_sps(struct amd_pmf_dev *dev);
+void amd_pmf_deinit_sps(struct amd_pmf_dev *dev);
+int apmf_get_static_slider_granular(struct apmf_if *ampf_if,
+ struct apmf_static_slider_granular_output *output);
+void amd_pmf_load_defaults_sps(struct amd_pmf_dev *dev);
#endif /* PMF_H */
diff --git a/drivers/platform/x86/amd/pmf/sps.c b/drivers/platform/x86/amd/pmf/sps.c
new file mode 100644
index 000000000000..2601adbfe14a
--- /dev/null
+++ b/drivers/platform/x86/amd/pmf/sps.c
@@ -0,0 +1,152 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * AMD Platform Management Framework (PMF) Driver
+ *
+ * Copyright (c) 2022, Advanced Micro Devices, Inc.
+ * All Rights Reserved.
+ *
+ * Author: Shyam Sundar S K <Shyam-sundar.S-k@xxxxxxx>
+ */
+
+#include "pmf.h"
+
+static int amd_pmf_profile_get(struct platform_profile_handler *pprof,
+ enum platform_profile_option *profile);
+static int amd_pmf_profile_set(struct platform_profile_handler *pprof,
+ enum platform_profile_option profile);
+static struct amd_pmf_static_slider_granular config_store;
+
+void amd_pmf_load_defaults_sps(struct amd_pmf_dev *dev)
+{
+ struct apmf_static_slider_granular_output output;
+ int i, j, idx = 0;
+
+ memset(&config_store, 0, sizeof(config_store));
+
+ if (dev->apmf_if->func.static_slider_granular) {
+ apmf_get_static_slider_granular(dev->apmf_if, &output);
+
+ for (i = 0; i < POWER_SOURCE_MAX; i++) {
+ for (j = 0; j < POWER_MODE_MAX; j++) {
+ config_store.prop[i][j].spl = output.prop[idx].spl;
+ config_store.prop[i][j].sppt = output.prop[idx].sppt;
+ config_store.prop[i][j].sppt_apu_only =
+ output.prop[idx].sppt_apu_only;
+ config_store.prop[i][j].fppt = output.prop[idx].fppt;
+ config_store.prop[i][j].stt_min = output.prop[idx].stt_min;
+ config_store.prop[i][j].stt_skin_temp[STT_TEMP_APU] =
+ output.prop[idx].stt_skin_temp[STT_TEMP_APU];
+ config_store.prop[i][j].stt_skin_temp[STT_TEMP_HS2] =
+ output.prop[idx].stt_skin_temp[STT_TEMP_HS2];
+ config_store.prop[i][j].fan_id = output.prop[idx].fan_id;
+ idx++;
+ }
+ }
+ }
+}
+
+void amd_pmf_update_slider(struct amd_pmf_dev *dev, bool op, int idx,
+ struct amd_pmf_static_slider_granular *table)
+{
+ int src = amd_pmf_get_power_source();
+
+ if (op == SLIDER_OP_SET) {
+ amd_pmf_send_cmd(dev, SET_SPL, false, config_store.prop[src][idx].spl, NULL);
+ amd_pmf_send_cmd(dev, SET_FPPT, false, config_store.prop[src][idx].fppt, NULL);
+ amd_pmf_send_cmd(dev, SET_SPPT, false, config_store.prop[src][idx].sppt, NULL);
+ amd_pmf_send_cmd(dev, SET_SPPT_APU_ONLY, false,
+ config_store.prop[src][idx].sppt_apu_only, NULL);
+ amd_pmf_send_cmd(dev, SET_STT_MIN_LIMIT, false,
+ config_store.prop[src][idx].stt_min, NULL);
+ amd_pmf_send_cmd(dev, SET_STT_LIMIT_APU, false,
+ config_store.prop[src][idx].stt_skin_temp[STT_TEMP_APU], NULL);
+ amd_pmf_send_cmd(dev, SET_STT_LIMIT_HS2, false,
+ config_store.prop[src][idx].stt_skin_temp[STT_TEMP_HS2], NULL);
+ } else if (op == SLIDER_OP_GET) {
+ amd_pmf_send_cmd(dev, GET_SPL, true, ARG_NONE, &table->prop[src][idx].spl);
+ amd_pmf_send_cmd(dev, GET_FPPT, true, ARG_NONE, &table->prop[src][idx].fppt);
+ amd_pmf_send_cmd(dev, GET_SPPT, true, ARG_NONE, &table->prop[src][idx].sppt);
+ amd_pmf_send_cmd(dev, GET_SPPT_APU_ONLY, true, ARG_NONE,
+ &table->prop[src][idx].sppt_apu_only);
+ amd_pmf_send_cmd(dev, GET_STT_MIN_LIMIT, true, ARG_NONE,
+ &table->prop[src][idx].stt_min);
+ amd_pmf_send_cmd(dev, GET_STT_LIMIT_APU, true, ARG_NONE,
+ (u32 *)&table->prop[src][idx].stt_skin_temp[STT_TEMP_APU]);
+ amd_pmf_send_cmd(dev, GET_STT_LIMIT_HS2, true, ARG_NONE,
+ (u32 *)&table->prop[src][idx].stt_skin_temp[STT_TEMP_HS2]);
+ }
+}
+
+static int amd_pmf_profile_get(struct platform_profile_handler *pprof,
+ enum platform_profile_option *profile)
+{
+ struct amd_pmf_dev *pmf = container_of(pprof, struct amd_pmf_dev, pprof);
+
+ *profile = pmf->current_profile;
+ return 0;
+}
+
+u8 amd_pmf_get_pprof_modes(struct amd_pmf_dev *pmf)
+{
+ u8 mode;
+
+ switch (pmf->current_profile) {
+ case PLATFORM_PROFILE_PERFORMANCE:
+ mode = POWER_MODE_PERFORMANCE;
+ break;
+ case PLATFORM_PROFILE_BALANCED:
+ mode = POWER_MODE_BALANCED_POWER;
+ break;
+ case PLATFORM_PROFILE_LOW_POWER:
+ mode = POWER_MODE_POWER_SAVER;
+ break;
+ default:
+ dev_err(pmf->dev, "Unknown Platform Profile.\n");
+ break;
+ }
+
+ return mode;
+}
+
+int amd_pmf_profile_set(struct platform_profile_handler *pprof,
+ enum platform_profile_option profile)
+{
+ struct amd_pmf_dev *pmf = container_of(pprof, struct amd_pmf_dev, pprof);
+ u8 mode;
+
+ pmf->current_profile = profile;
+ mode = amd_pmf_get_pprof_modes(pmf);
+ amd_pmf_update_slider(pmf, SLIDER_OP_SET, mode, NULL);
+ return 0;
+}
+
+int amd_pmf_init_sps(struct amd_pmf_dev *dev)
+{
+ int err = 0;
+
+ dev->pprof.profile_get = amd_pmf_profile_get;
+ dev->pprof.profile_set = amd_pmf_profile_set;
+
+ /* Setup supported modes */
+ set_bit(PLATFORM_PROFILE_LOW_POWER, dev->pprof.choices);
+ set_bit(PLATFORM_PROFILE_BALANCED, dev->pprof.choices);
+ set_bit(PLATFORM_PROFILE_PERFORMANCE, dev->pprof.choices);
+
+ /* Create platform_profile structure and register */
+ err = platform_profile_register(&dev->pprof);
+ if (err) {
+ dev_err(dev->dev, "Failed to register SPS support, this is most likely an SBIOS bug: %d\n",
+ err);
+ return -EEXIST;
+ }
+
+ dev->current_profile = PLATFORM_PROFILE_BALANCED;
+ amd_pmf_load_defaults_sps(dev);
+
+ return err;
+}
+
+void amd_pmf_deinit_sps(struct amd_pmf_dev *dev)
+{
+ platform_profile_remove();
+}
--
2.25.1
