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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Intel Speed Select Interface: OS to hardware Interface
* Copyright (c) 2019, Intel Corporation.
* All rights reserved.
*
* Author: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
*/
#ifndef __ISST_IF_H
#define __ISST_IF_H
#include <linux/types.h>
/**
* struct isst_if_platform_info - Define platform information
* @api_version: Version of the firmware document, which this driver
* can communicate
* @driver_version: Driver version, which will help user to send right
* commands. Even if the firmware is capable, driver may
* not be ready
* @max_cmds_per_ioctl: Returns the maximum number of commands driver will
* accept in a single ioctl
* @mbox_supported: Support of mail box interface
* @mmio_supported: Support of mmio interface for core-power feature
*
* Used to return output of IOCTL ISST_IF_GET_PLATFORM_INFO. This
* information can be used by the user space, to get the driver, firmware
* support and also number of commands to send in a single IOCTL request.
*/
struct isst_if_platform_info {
__u16 api_version;
__u16 driver_version;
__u16 max_cmds_per_ioctl;
__u8 mbox_supported;
__u8 mmio_supported;
};
/**
* struct isst_if_cpu_map - CPU mapping between logical and physical CPU
* @logical_cpu: Linux logical CPU number
* @physical_cpu: PUNIT CPU number
*
* Used to convert from Linux logical CPU to PUNIT CPU numbering scheme.
* The PUNIT CPU number is different than APIC ID based CPU numbering.
*/
struct isst_if_cpu_map {
__u32 logical_cpu;
__u32 physical_cpu;
};
/**
* struct isst_if_cpu_maps - structure for CPU map IOCTL
* @cmd_count: Number of CPU mapping command in cpu_map[]
* @cpu_map[]: Holds one or more CPU map data structure
*
* This structure used with ioctl ISST_IF_GET_PHY_ID to send
* one or more CPU mapping commands. Here IOCTL return value indicates
* number of commands sent or error number if no commands have been sent.
*/
struct isst_if_cpu_maps {
__u32 cmd_count;
struct isst_if_cpu_map cpu_map[1];
};
/**
* struct isst_if_io_reg - Read write PUNIT IO register
* @read_write: Value 0: Read, 1: Write
* @logical_cpu: Logical CPU number to get target PCI device.
* @reg: PUNIT register offset
* @value: For write operation value to write and for
* for read placeholder read value
*
* Structure to specify read/write data to PUNIT registers.
*/
struct isst_if_io_reg {
__u32 read_write; /* Read:0, Write:1 */
__u32 logical_cpu;
__u32 reg;
__u32 value;
};
/**
* struct isst_if_io_regs - structure for IO register commands
* @cmd_count: Number of io reg commands in io_reg[]
* @io_reg[]: Holds one or more io_reg command structure
*
* This structure used with ioctl ISST_IF_IO_CMD to send
* one or more read/write commands to PUNIT. Here IOCTL return value
* indicates number of requests sent or error number if no requests have
* been sent.
*/
struct isst_if_io_regs {
__u32 req_count;
struct isst_if_io_reg io_reg[1];
};
/**
* struct isst_if_mbox_cmd - Structure to define mail box command
* @logical_cpu: Logical CPU number to get target PCI device
* @parameter: Mailbox parameter value
* @req_data: Request data for the mailbox
* @resp_data: Response data for mailbox command response
* @command: Mailbox command value
* @sub_command: Mailbox sub command value
* @reserved: Unused, set to 0
*
* Structure to specify mailbox command to be sent to PUNIT.
*/
struct isst_if_mbox_cmd {
__u32 logical_cpu;
__u32 parameter;
__u32 req_data;
__u32 resp_data;
__u16 command;
__u16 sub_command;
__u32 reserved;
};
/**
* struct isst_if_mbox_cmds - structure for mailbox commands
* @cmd_count: Number of mailbox commands in mbox_cmd[]
* @mbox_cmd[]: Holds one or more mbox commands
*
* This structure used with ioctl ISST_IF_MBOX_COMMAND to send
* one or more mailbox commands to PUNIT. Here IOCTL return value
* indicates number of commands sent or error number if no commands have
* been sent.
*/
struct isst_if_mbox_cmds {
__u32 cmd_count;
struct isst_if_mbox_cmd mbox_cmd[1];
};
/**
* struct isst_if_msr_cmd - Structure to define msr command
* @read_write: Value 0: Read, 1: Write
* @logical_cpu: Logical CPU number
* @msr: MSR number
* @data: For write operation, data to write, for read
* place holder
*
* Structure to specify MSR command related to PUNIT.
*/
struct isst_if_msr_cmd {
__u32 read_write; /* Read:0, Write:1 */
__u32 logical_cpu;
__u64 msr;
__u64 data;
};
/**
* struct isst_if_msr_cmds - structure for msr commands
* @cmd_count: Number of mailbox commands in msr_cmd[]
* @msr_cmd[]: Holds one or more msr commands
*
* This structure used with ioctl ISST_IF_MSR_COMMAND to send
* one or more MSR commands. IOCTL return value indicates number of
* commands sent or error number if no commands have been sent.
*/
struct isst_if_msr_cmds {
__u32 cmd_count;
struct isst_if_msr_cmd msr_cmd[1];
};
#define ISST_IF_MAGIC 0xFE
#define ISST_IF_GET_PLATFORM_INFO _IOR(ISST_IF_MAGIC, 0, struct isst_if_platform_info *)
#define ISST_IF_GET_PHY_ID _IOWR(ISST_IF_MAGIC, 1, struct isst_if_cpu_map *)
#define ISST_IF_IO_CMD _IOW(ISST_IF_MAGIC, 2, struct isst_if_io_regs *)
#define ISST_IF_MBOX_COMMAND _IOWR(ISST_IF_MAGIC, 3, struct isst_if_mbox_cmds *)
#define ISST_IF_MSR_COMMAND _IOWR(ISST_IF_MAGIC, 4, struct isst_if_msr_cmds *)
#endif