platform/x86: Add AMD system management interface (91f410aa) · Commits · EulixOS / Software / Kernel

Documentation/userspace-api/ioctl/ioctl-number.rst

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		@@ -372,6 +372,8 @@ Code Seq# Include File Comments
		<mailto:thomas@winischhofer.net>
		0xF6 all LTTng Linux Trace Toolkit Next Generation
		<mailto:mathieu.desnoyers@efficios.com>
		0xF8 all arch/x86/include/uapi/asm/amd_hsmp.h AMD HSMP EPYC system management interface driver
		<mailto:nchatrad@amd.com>
		0xFD all linux/dm-ioctl.h
		0xFE all linux/isst_if.h
		==== ===== ======================================================= ================================================================

MAINTAINERS

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		@@ -988,6 +988,16 @@ L: platform-driver-x86@vger.kernel.org
		S: Maintained
		F: drivers/platform/x86/amd-pmc.*

		AMD HSMP DRIVER
		M: Naveen Krishna Chatradhi <naveenkrishna.chatradhi@amd.com>
		R: Carlos Bilbao <carlos.bilbao@amd.com>
		L: platform-driver-x86@vger.kernel.org
		S: Maintained
		F: Documentation/x86/amd_hsmp.rst
		F: arch/x86/include/asm/amd_hsmp.h
		F: arch/x86/include/uapi/asm/amd_hsmp.h
		F: drivers/platform/x86/amd_hsmp.c

		AMD POWERPLAY AND SWSMU
		M: Evan Quan <evan.quan@amd.com>
		L: amd-gfx@lists.freedesktop.org

arch/x86/include/asm/amd_hsmp.h

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		/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

		#ifndef _ASM_X86_AMD_HSMP_H_
		#define _ASM_X86_AMD_HSMP_H_

		#include <uapi/asm/amd_hsmp.h>

		#if IS_ENABLED(CONFIG_AMD_HSMP)
		int hsmp_send_message(struct hsmp_message *msg);
		#else
		static inline int hsmp_send_message(struct hsmp_message *msg)
		{
		return -ENODEV;
		}
		#endif
		#endif /_ASM_X86_AMD_HSMP_H_/

arch/x86/include/uapi/asm/amd_hsmp.h

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		/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

		#ifndef _UAPI_ASM_X86_AMD_HSMP_H_
		#define _UAPI_ASM_X86_AMD_HSMP_H_

		#include <linux/types.h>

		#pragma pack(4)

		#define HSMP_MAX_MSG_LEN 8

		/*
		* HSMP Messages supported
		*/
		enum hsmp_message_ids {
		HSMP_TEST = 1, /* 01h Increments input value by 1 */
		HSMP_GET_SMU_VER, /* 02h SMU FW version */
		HSMP_GET_PROTO_VER, /* 03h HSMP interface version */
		HSMP_GET_SOCKET_POWER, /* 04h average package power consumption */
		HSMP_SET_SOCKET_POWER_LIMIT, /* 05h Set the socket power limit */
		HSMP_GET_SOCKET_POWER_LIMIT, /* 06h Get current socket power limit */
		HSMP_GET_SOCKET_POWER_LIMIT_MAX,/* 07h Get maximum socket power value */
		HSMP_SET_BOOST_LIMIT, /* 08h Set a core maximum frequency limit */
		HSMP_SET_BOOST_LIMIT_SOCKET, /* 09h Set socket maximum frequency level */
		HSMP_GET_BOOST_LIMIT, /* 0Ah Get current frequency limit */
		HSMP_GET_PROC_HOT, /* 0Bh Get PROCHOT status */
		HSMP_SET_XGMI_LINK_WIDTH, /* 0Ch Set max and min width of xGMI Link */
		HSMP_SET_DF_PSTATE, /* 0Dh Alter APEnable/Disable messages behavior */
		HSMP_SET_AUTO_DF_PSTATE, /* 0Eh Enable DF P-State Performance Boost algorithm */
		HSMP_GET_FCLK_MCLK, /* 0Fh Get FCLK and MEMCLK for current socket */
		HSMP_GET_CCLK_THROTTLE_LIMIT, /* 10h Get CCLK frequency limit in socket */
		HSMP_GET_C0_PERCENT, /* 11h Get average C0 residency in socket */
		HSMP_SET_NBIO_DPM_LEVEL, /* 12h Set max/min LCLK DPM Level for a given NBIO */
		/* 13h Reserved */
		HSMP_GET_DDR_BANDWIDTH = 0x14, /* 14h Get theoretical maximum and current DDR Bandwidth */
		HSMP_GET_TEMP_MONITOR, /* 15h Get per-DIMM temperature and refresh rates */
		HSMP_MSG_ID_MAX,
		};

		struct hsmp_message {
		__u32 msg_id; /* Message ID */
		__u16 num_args; /* Number of input argument words in message */
		__u16 response_sz; /* Number of expected output/response words */
		__u32 args[HSMP_MAX_MSG_LEN]; /* argument/response buffer */
		__u16 sock_ind; /* socket number */
		};

		enum hsmp_msg_type {
		HSMP_RSVD = -1,
		HSMP_SET = 0,
		HSMP_GET = 1,
		};

		struct hsmp_msg_desc {
		int num_args;
		int response_sz;
		enum hsmp_msg_type type;
		};

		/*
		* User may use these comments as reference, please find the
		* supported list of messages and message definition in the
		* HSMP chapter of respective family/model PPR.
		*
		* Not supported messages would return -ENOMSG.
		*/
		static const struct hsmp_msg_desc hsmp_msg_desc_table[] = {
		/* RESERVED */
		{0, 0, HSMP_RSVD},

		/*
		* HSMP_TEST, num_args = 1, response_sz = 1
		* input: args[0] = xx
		* output: args[0] = xx + 1
		*/
		{1, 1, HSMP_GET},

		/*
		* HSMP_GET_SMU_VER, num_args = 0, response_sz = 1
		* output: args[0] = smu fw ver
		*/
		{0, 1, HSMP_GET},

		/*
		* HSMP_GET_PROTO_VER, num_args = 0, response_sz = 1
		* output: args[0] = proto version
		*/
		{0, 1, HSMP_GET},

		/*
		* HSMP_GET_SOCKET_POWER, num_args = 0, response_sz = 1
		* output: args[0] = socket power in mWatts
		*/
		{0, 1, HSMP_GET},

		/*
		* HSMP_SET_SOCKET_POWER_LIMIT, num_args = 1, response_sz = 0
		* input: args[0] = power limit value in mWatts
		*/
		{1, 0, HSMP_SET},

		/*
		* HSMP_GET_SOCKET_POWER_LIMIT, num_args = 0, response_sz = 1
		* output: args[0] = socket power limit value in mWatts
		*/
		{0, 1, HSMP_GET},

		/*
		* HSMP_GET_SOCKET_POWER_LIMIT_MAX, num_args = 0, response_sz = 1
		* output: args[0] = maximuam socket power limit in mWatts
		*/
		{0, 1, HSMP_GET},

		/*
		* HSMP_SET_BOOST_LIMIT, num_args = 1, response_sz = 0
		* input: args[0] = apic id[31:16] + boost limit value in MHz[15:0]
		*/
		{1, 0, HSMP_SET},

		/*
		* HSMP_SET_BOOST_LIMIT_SOCKET, num_args = 1, response_sz = 0
		* input: args[0] = boost limit value in MHz
		*/
		{1, 0, HSMP_SET},

		/*
		* HSMP_GET_BOOST_LIMIT, num_args = 1, response_sz = 1
		* input: args[0] = apic id
		* output: args[0] = boost limit value in MHz
		*/
		{1, 1, HSMP_GET},

		/*
		* HSMP_GET_PROC_HOT, num_args = 0, response_sz = 1
		* output: args[0] = proc hot status
		*/
		{0, 1, HSMP_GET},

		/*
		* HSMP_SET_XGMI_LINK_WIDTH, num_args = 1, response_sz = 0
		* input: args[0] = min link width[15:8] + max link width[7:0]
		*/
		{1, 0, HSMP_SET},

		/*
		* HSMP_SET_DF_PSTATE, num_args = 1, response_sz = 0
		* input: args[0] = df pstate[7:0]
		*/
		{1, 0, HSMP_SET},

		/* HSMP_SET_AUTO_DF_PSTATE, num_args = 0, response_sz = 0 */
		{0, 0, HSMP_SET},

		/*
		* HSMP_GET_FCLK_MCLK, num_args = 0, response_sz = 2
		* output: args[0] = fclk in MHz, args[1] = mclk in MHz
		*/
		{0, 2, HSMP_GET},

		/*
		* HSMP_GET_CCLK_THROTTLE_LIMIT, num_args = 0, response_sz = 1
		* output: args[0] = core clock in MHz
		*/
		{0, 1, HSMP_GET},

		/*
		* HSMP_GET_C0_PERCENT, num_args = 0, response_sz = 1
		* output: args[0] = average c0 residency
		*/
		{0, 1, HSMP_GET},

		/*
		* HSMP_SET_NBIO_DPM_LEVEL, num_args = 1, response_sz = 0
		* input: args[0] = nbioid[23:16] + max dpm level[15:8] + min dpm level[7:0]
		*/
		{1, 0, HSMP_SET},

		/* RESERVED message */
		{0, 0, HSMP_RSVD},

		/*
		* HSMP_GET_DDR_BANDWIDTH, num_args = 0, response_sz = 1
		* output: args[0] = max bw in Gbps[31:20] + utilised bw in Gbps[19:8] +
		* bw in percentage[7:0]
		*/
		{0, 1, HSMP_GET},

		/*
		* HSMP_GET_TEMP_MONITOR, num_args = 0, response_sz = 1
		* output: args[0] = temperature in degree celsius. [15:8] integer part +
		* [7:5] fractional part
		*/
		{0, 1, HSMP_GET},
		};

		/* Reset to default packing */
		#pragma pack()

		/* Define unique ioctl command for hsmp msgs using generic _IOWR */
		#define HSMP_BASE_IOCTL_NR 0xF8
		#define HSMP_IOCTL_CMD _IOWR(HSMP_BASE_IOCTL_NR, 0, struct hsmp_message)

		#endif /_ASM_X86_AMD_HSMP_H_/

drivers/platform/x86/Kconfig

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		@@ -210,6 +210,19 @@ config AMD_PMC
		If you choose to compile this driver as a module the module will be
		called amd-pmc.

		config AMD_HSMP
		tristate "AMD HSMP Driver"
		depends on AMD_NB && X86_64
		help
		The driver provides a way for user space tools to monitor and manage
		system management functionality on EPYC server CPUs from AMD.

		Host System Management Port (HSMP) interface is a mailbox interface
		between the x86 core and the System Management Unit (SMU) firmware.

		If you choose to compile this driver as a module the module will be
		called amd_hsmp.

		config ADV_SWBUTTON
		tristate "Advantech ACPI Software Button Driver"
		depends on ACPI && INPUT