root/usr/src/uts/common/sys/devfm.h
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 * Copyright (c) 2018, Joyent, Inc.
 * Copyright 2023 Oxide Computer Company
 */

#ifndef _SYS_DEVFM_H
#define _SYS_DEVFM_H

#include <sys/types.h>
#include <sys/nvpair.h>

#ifdef  __cplusplus
extern "C" {
#endif

#define FM_IOC_MAXBUFSZ         32768   /* 32 KiB */
#define FM_IOC_OUT_BUFSZ        32768   /* 32 KiB */
#define FM_IOC_OUT_MAXBUFSZ     1048576 /* 1 MiB */
#define FM_DRV_VERSION          1

#define FM_VERSIONS_VERSION     "fm-versions-version"
#define FM_PAGE_OP_VERSION      "page-operation-version"
#define FM_CPU_OP_VERSION       "cpu-operation-version"
#define FM_CPU_INFO_VERSION     "cpu-info-version"
#define FM_TOPO_LEGACY_VERSION  "topo-legacy-version"
#define FM_CACHE_INFO_VERSION   "cache-info-version"

/*
 * FMA driver ioctl interfaces
 */
#define FM_IOC                  (0xFA << 16)
#define FM_IOC_VERSIONS         (FM_IOC | 1)
#define FM_IOC_PAGE_RETIRE      (FM_IOC | 2)
#define FM_IOC_PAGE_STATUS      (FM_IOC | 3)
#define FM_IOC_PAGE_UNRETIRE    (FM_IOC | 4)

#if defined(__x86)
#define FM_IOC_PHYSCPU_INFO     (FM_IOC | 5)
#define FM_IOC_CPU_RETIRE       (FM_IOC | 6)
#define FM_IOC_CPU_STATUS       (FM_IOC | 7)
#define FM_IOC_CPU_UNRETIRE     (FM_IOC | 8)
#define FM_IOC_GENTOPO_LEGACY   (FM_IOC | 9)
#endif  /* __x86 */

/*
 * Information about caches. Each CPU that is in the physical CPU information
 * will be in here in the same ID order allowing one to map them directly.
 */
#define FM_IOC_CACHE_INFO       (FM_IOC | 10)

/*
 * Types
 */
typedef struct fm_ioc_data {
        uint32_t        fid_version;    /* interface version */
        size_t          fid_insz;       /* size of packed input nvlist */
        caddr_t         fid_inbuf;      /* buf containing packed input nvl */
        size_t          fid_outsz;      /* size of packed output nvlist */
        caddr_t         fid_outbuf;     /* buf containing packed output nvl */
} fm_ioc_data_t;

#ifdef _KERNEL
typedef struct fm_ioc_data32 {
        uint32_t        fid_version;    /* interface version */
        size32_t        fid_insz;       /* size of packed input nvlist */
        caddr32_t       fid_inbuf;      /* buf containing packed input nvl */
        size32_t        fid_outsz;      /* size of packed output nvlist */
        caddr32_t       fid_outbuf;     /* buf containing packed output nvl */
} fm_ioc_data32_t;
#endif  /* _KERNEL */

/*
 * Constants
 */
#define FM_PAGE_RETIRE_FMRI             "fmri"
#define FM_PHYSCPU_INFO_CPUS            "cpus"
#define FM_CPU_RETIRE_CHIP_ID           "chip_id"
#define FM_PHYSCPU_INFO_NPROCNODES      "procnodes_per_pkg"
#define FM_PHYSCPU_INFO_PROCNODE_ID     "procnodeid"
#define FM_CPU_RETIRE_CORE_ID           "core_id"
#define FM_CPU_RETIRE_STRAND_ID         "strand_id"
#define FM_CPU_RETIRE_OLDSTATUS         "oldstatus"
#define FM_GENTOPO_LEGACY               "gentopolegacy"
#define FM_CACHE_INFO_NCPUS             "ncpus"

/*
 * Properties set by FM_PHYSCPU_INFO
 */
#define FM_PHYSCPU_INFO_VENDOR_ID       "vendor_id"
#define FM_PHYSCPU_INFO_FAMILY          "family"
#define FM_PHYSCPU_INFO_MODEL           "model"
#define FM_PHYSCPU_INFO_STEPPING        "stepping"

/*
 * When Multi-Chip-Module(MCM) support is added
 * chip_id should map to the processor package
 * and not the die in the processor package.
 * This is for FMA; kernel's perception of
 * chip_id could differ for MCM.
 */
#define FM_PHYSCPU_INFO_CHIP_ID         "chip_id"

#define FM_PHYSCPU_INFO_CORE_ID         "core_id"
#define FM_PHYSCPU_INFO_STRAND_ID       "strand_id"
#define FM_PHYSCPU_INFO_STRAND_APICID   "strand_initial_apicid"
#define FM_PHYSCPU_INFO_SMBIOS_ID       "smbios_id"
#define FM_PHYSCPU_INFO_CHIP_ROOTS      "chip_roots"
#define FM_PHYSCPU_INFO_CHIP_REV        "chip_rev"
#define FM_PHYSCPU_INFO_SOCKET_TYPE     "socket_type"
#define FM_PHYSCPU_INFO_CPU_ID          "cpuid"
#define FM_PHYSCPU_INFO_CHIP_IDENTSTR   "chip_identstr"

/*
 * Information exposed by the cache information structure. This is currently
 * organized by the given caches available to a CPU. There is a given nvlist_t
 * array for each cache level. The majority of these entries are meant to be
 * generic across all platforms and derived from the underlying architecture's
 * metadata (CPUID, CLIDR_EL1, etc.).
 *
 * The FM_CACHE_INFO_ID value is manufactured by the kernel. CPU architectures
 * generally present cache information as specific to a logical CPU. This allows
 * systems to determine what level caches are shared between different CPUs by
 * comparing these entries across CPUs. Items prefixed with a given architecture
 * are specific to it and will not show up on other platforms. These exist so
 * topology modules can have more information than just the cache-id. While it's
 * helpful, it doesn't tell us what level of the CPU (or whether it's internal
 * or external) it exists at. This is going to be architecture and potentially
 * platform specific given that ARMv8-A/ARMv9-A doesn't define a way to get this
 * for example.
 *
 * It is expected that callers will always fill out the sets and ways
 * appropriately. If a cache is fully-associative, we expects the number of sets
 * to be populated and set to 1 that way consumers can attempt to have a uniform
 * experience here.
 */
#define FM_CACHE_INFO_LEVEL             "cache-level"   /* uint32_t */
#define FM_CACHE_INFO_TYPE              "cache-type"    /* uint32_t */
typedef enum {
        FM_CACHE_INFO_T_DATA    = 1 << 0,
        FM_CACHE_INFO_T_INSTR   = 1 << 1,
        FM_CACHE_INFO_T_UNIFIED = 1 << 2
} fm_cache_info_type_t;
#define FM_CACHE_INFO_NSETS             "cache-sets"    /* uint64_t */
#define FM_CACHE_INFO_NWAYS             "cache-ways"    /* uint32_t */
#define FM_CACHE_INFO_LINE_SIZE         "line-size"     /* uint32_t */
#define FM_CACHE_INFO_TOTAL_SIZE        "total-size"    /* uint64_t */
#define FM_CACHE_INFO_FULLY_ASSOC       "fully-associative" /* boolean (key) */
#define FM_CACHE_INFO_ID                "cache-id"      /* uint64_t */
#define FM_CACHE_INFO_X86_APIC_SHIFT    "x86-apic-shift"        /* uint32_t */

#ifdef  __cplusplus
}
#endif

#endif  /* _SYS_DEVFM_H */