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isst_if.h
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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