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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/s390/include/uapi/asm/dasd.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/s390/include/uapi/asm/dasd.h')
-rw-r--r--arch/s390/include/uapi/asm/dasd.h352
1 files changed, 352 insertions, 0 deletions
diff --git a/arch/s390/include/uapi/asm/dasd.h b/arch/s390/include/uapi/asm/dasd.h
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+++ b/arch/s390/include/uapi/asm/dasd.h
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+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
+ * Bugreports.to..: <Linux390@de.ibm.com>
+ * Copyright IBM Corp. 1999, 2000
+ * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
+ * Author.........: Nigel Hislop <hislop_nigel@emc.com>
+ *
+ * This file is the interface of the DASD device driver, which is exported to user space
+ * any future changes wrt the API will result in a change of the APIVERSION reported
+ * to userspace by the DASDAPIVER-ioctl
+ *
+ */
+
+#ifndef DASD_H
+#define DASD_H
+#include <linux/types.h>
+#include <linux/ioctl.h>
+
+#define DASD_IOCTL_LETTER 'D'
+
+#define DASD_API_VERSION 6
+
+/*
+ * struct dasd_information2_t
+ * represents any data about the device, which is visible to userspace.
+ * including foramt and featueres.
+ */
+typedef struct dasd_information2_t {
+ unsigned int devno; /* S/390 devno */
+ unsigned int real_devno; /* for aliases */
+ unsigned int schid; /* S/390 subchannel identifier */
+ unsigned int cu_type : 16; /* from SenseID */
+ unsigned int cu_model : 8; /* from SenseID */
+ unsigned int dev_type : 16; /* from SenseID */
+ unsigned int dev_model : 8; /* from SenseID */
+ unsigned int open_count;
+ unsigned int req_queue_len;
+ unsigned int chanq_len; /* length of chanq */
+ char type[4]; /* from discipline.name, 'none' for unknown */
+ unsigned int status; /* current device level */
+ unsigned int label_block; /* where to find the VOLSER */
+ unsigned int FBA_layout; /* fixed block size (like AIXVOL) */
+ unsigned int characteristics_size;
+ unsigned int confdata_size;
+ char characteristics[64]; /* from read_device_characteristics */
+ char configuration_data[256]; /* from read_configuration_data */
+ unsigned int format; /* format info like formatted/cdl/ldl/... */
+ unsigned int features; /* dasd features like 'ro',... */
+ unsigned int reserved0; /* reserved for further use ,... */
+ unsigned int reserved1; /* reserved for further use ,... */
+ unsigned int reserved2; /* reserved for further use ,... */
+ unsigned int reserved3; /* reserved for further use ,... */
+ unsigned int reserved4; /* reserved for further use ,... */
+ unsigned int reserved5; /* reserved for further use ,... */
+ unsigned int reserved6; /* reserved for further use ,... */
+ unsigned int reserved7; /* reserved for further use ,... */
+} dasd_information2_t;
+
+/*
+ * values to be used for dasd_information_t.format
+ * 0x00: NOT formatted
+ * 0x01: Linux disc layout
+ * 0x02: Common disc layout
+ */
+#define DASD_FORMAT_NONE 0
+#define DASD_FORMAT_LDL 1
+#define DASD_FORMAT_CDL 2
+/*
+ * values to be used for dasd_information_t.features
+ * 0x100: default features
+ * 0x001: readonly (ro)
+ * 0x002: use diag discipline (diag)
+ * 0x004: set the device initially online (internal use only)
+ * 0x008: enable ERP related logging
+ * 0x010: allow I/O to fail on lost paths
+ * 0x020: allow I/O to fail when a lock was stolen
+ * 0x040: give access to raw eckd data
+ * 0x080: enable discard support
+ * 0x100: enable autodisable for IFCC errors (default)
+ */
+#define DASD_FEATURE_READONLY 0x001
+#define DASD_FEATURE_USEDIAG 0x002
+#define DASD_FEATURE_INITIAL_ONLINE 0x004
+#define DASD_FEATURE_ERPLOG 0x008
+#define DASD_FEATURE_FAILFAST 0x010
+#define DASD_FEATURE_FAILONSLCK 0x020
+#define DASD_FEATURE_USERAW 0x040
+#define DASD_FEATURE_DISCARD 0x080
+#define DASD_FEATURE_PATH_AUTODISABLE 0x100
+#define DASD_FEATURE_DEFAULT DASD_FEATURE_PATH_AUTODISABLE
+
+#define DASD_PARTN_BITS 2
+
+/*
+ * struct dasd_information_t
+ * represents any data about the data, which is visible to userspace
+ */
+typedef struct dasd_information_t {
+ unsigned int devno; /* S/390 devno */
+ unsigned int real_devno; /* for aliases */
+ unsigned int schid; /* S/390 subchannel identifier */
+ unsigned int cu_type : 16; /* from SenseID */
+ unsigned int cu_model : 8; /* from SenseID */
+ unsigned int dev_type : 16; /* from SenseID */
+ unsigned int dev_model : 8; /* from SenseID */
+ unsigned int open_count;
+ unsigned int req_queue_len;
+ unsigned int chanq_len; /* length of chanq */
+ char type[4]; /* from discipline.name, 'none' for unknown */
+ unsigned int status; /* current device level */
+ unsigned int label_block; /* where to find the VOLSER */
+ unsigned int FBA_layout; /* fixed block size (like AIXVOL) */
+ unsigned int characteristics_size;
+ unsigned int confdata_size;
+ char characteristics[64]; /* from read_device_characteristics */
+ char configuration_data[256]; /* from read_configuration_data */
+} dasd_information_t;
+
+/*
+ * Read Subsystem Data - Performance Statistics
+ */
+typedef struct dasd_rssd_perf_stats_t {
+ unsigned char invalid:1;
+ unsigned char format:3;
+ unsigned char data_format:4;
+ unsigned char unit_address;
+ unsigned short device_status;
+ unsigned int nr_read_normal;
+ unsigned int nr_read_normal_hits;
+ unsigned int nr_write_normal;
+ unsigned int nr_write_fast_normal_hits;
+ unsigned int nr_read_seq;
+ unsigned int nr_read_seq_hits;
+ unsigned int nr_write_seq;
+ unsigned int nr_write_fast_seq_hits;
+ unsigned int nr_read_cache;
+ unsigned int nr_read_cache_hits;
+ unsigned int nr_write_cache;
+ unsigned int nr_write_fast_cache_hits;
+ unsigned int nr_inhibit_cache;
+ unsigned int nr_bybass_cache;
+ unsigned int nr_seq_dasd_to_cache;
+ unsigned int nr_dasd_to_cache;
+ unsigned int nr_cache_to_dasd;
+ unsigned int nr_delayed_fast_write;
+ unsigned int nr_normal_fast_write;
+ unsigned int nr_seq_fast_write;
+ unsigned int nr_cache_miss;
+ unsigned char status2;
+ unsigned int nr_quick_write_promotes;
+ unsigned char reserved;
+ unsigned short ssid;
+ unsigned char reseved2[96];
+} __attribute__((packed)) dasd_rssd_perf_stats_t;
+
+/*
+ * struct profile_info_t
+ * holds the profinling information
+ */
+typedef struct dasd_profile_info_t {
+ unsigned int dasd_io_reqs; /* number of requests processed at all */
+ unsigned int dasd_io_sects; /* number of sectors processed at all */
+ unsigned int dasd_io_secs[32]; /* histogram of request's sizes */
+ unsigned int dasd_io_times[32]; /* histogram of requests's times */
+ unsigned int dasd_io_timps[32]; /* histogram of requests's times per sector */
+ unsigned int dasd_io_time1[32]; /* histogram of time from build to start */
+ unsigned int dasd_io_time2[32]; /* histogram of time from start to irq */
+ unsigned int dasd_io_time2ps[32]; /* histogram of time from start to irq */
+ unsigned int dasd_io_time3[32]; /* histogram of time from irq to end */
+ unsigned int dasd_io_nr_req[32]; /* histogram of # of requests in chanq */
+} dasd_profile_info_t;
+
+/*
+ * struct format_data_t
+ * represents all data necessary to format a dasd
+ */
+typedef struct format_data_t {
+ unsigned int start_unit; /* from track */
+ unsigned int stop_unit; /* to track */
+ unsigned int blksize; /* sectorsize */
+ unsigned int intensity;
+} format_data_t;
+
+/*
+ * struct dasd_copypair_swap_data_t
+ * represents all data necessary to issue a swap of the copy pair relation
+ */
+struct dasd_copypair_swap_data_t {
+ char primary[20]; /* BUSID of primary */
+ char secondary[20]; /* BUSID of secondary */
+
+ /* Reserved for future updates. */
+ __u8 reserved[64];
+};
+
+/*
+ * values to be used for format_data_t.intensity
+ * 0/8: normal format
+ * 1/9: also write record zero
+ * 3/11: also write home address
+ * 4/12: invalidate track
+ */
+#define DASD_FMT_INT_FMT_R0 1 /* write record zero */
+#define DASD_FMT_INT_FMT_HA 2 /* write home address, also set FMT_R0 ! */
+#define DASD_FMT_INT_INVAL 4 /* invalidate tracks */
+#define DASD_FMT_INT_COMPAT 8 /* use OS/390 compatible disk layout */
+#define DASD_FMT_INT_FMT_NOR0 16 /* remove permission to write record zero */
+#define DASD_FMT_INT_ESE_FULL 32 /* release space for entire volume */
+
+/*
+ * struct format_check_t
+ * represents all data necessary to evaluate the format of
+ * different tracks of a dasd
+ */
+typedef struct format_check_t {
+ /* Input */
+ struct format_data_t expect;
+
+ /* Output */
+ unsigned int result; /* Error indication (DASD_FMT_ERR_*) */
+ unsigned int unit; /* Track that is in error */
+ unsigned int rec; /* Record that is in error */
+ unsigned int num_records; /* Records in the track in error */
+ unsigned int blksize; /* Blocksize of first record in error */
+ unsigned int key_length; /* Key length of first record in error */
+} format_check_t;
+
+/* Values returned in format_check_t when a format error is detected: */
+/* Too few records were found on a single track */
+#define DASD_FMT_ERR_TOO_FEW_RECORDS 1
+/* Too many records were found on a single track */
+#define DASD_FMT_ERR_TOO_MANY_RECORDS 2
+/* Blocksize/data-length of a record was wrong */
+#define DASD_FMT_ERR_BLKSIZE 3
+/* A record ID is defined by cylinder, head, and record number (CHR). */
+/* On mismatch, this error is set */
+#define DASD_FMT_ERR_RECORD_ID 4
+/* If key-length was != 0 */
+#define DASD_FMT_ERR_KEY_LENGTH 5
+
+/*
+ * struct attrib_data_t
+ * represents the operation (cache) bits for the device.
+ * Used in DE to influence caching of the DASD.
+ */
+typedef struct attrib_data_t {
+ unsigned char operation:3; /* cache operation mode */
+ unsigned char reserved:5; /* cache operation mode */
+ __u16 nr_cyl; /* no of cyliners for read ahaed */
+ __u8 reserved2[29]; /* for future use */
+} __attribute__ ((packed)) attrib_data_t;
+
+/* definition of operation (cache) bits within attributes of DE */
+#define DASD_NORMAL_CACHE 0x0
+#define DASD_BYPASS_CACHE 0x1
+#define DASD_INHIBIT_LOAD 0x2
+#define DASD_SEQ_ACCESS 0x3
+#define DASD_SEQ_PRESTAGE 0x4
+#define DASD_REC_ACCESS 0x5
+
+/*
+ * Perform EMC Symmetrix I/O
+ */
+typedef struct dasd_symmio_parms {
+ unsigned char reserved[8]; /* compat with older releases */
+ unsigned long long psf_data; /* char * cast to u64 */
+ unsigned long long rssd_result; /* char * cast to u64 */
+ int psf_data_len;
+ int rssd_result_len;
+} __attribute__ ((packed)) dasd_symmio_parms_t;
+
+/*
+ * Data returned by Sense Path Group ID (SNID)
+ */
+struct dasd_snid_data {
+ struct {
+ __u8 group:2;
+ __u8 reserve:2;
+ __u8 mode:1;
+ __u8 res:3;
+ } __attribute__ ((packed)) path_state;
+ __u8 pgid[11];
+} __attribute__ ((packed));
+
+struct dasd_snid_ioctl_data {
+ struct dasd_snid_data data;
+ __u8 path_mask;
+} __attribute__ ((packed));
+
+
+/********************************************************************************
+ * SECTION: Definition of IOCTLs
+ *
+ * Here ist how the ioctl-nr should be used:
+ * 0 - 31 DASD driver itself
+ * 32 - 239 still open
+ * 240 - 255 reserved for EMC
+ *******************************************************************************/
+
+/* Disable the volume (for Linux) */
+#define BIODASDDISABLE _IO(DASD_IOCTL_LETTER,0)
+/* Enable the volume (for Linux) */
+#define BIODASDENABLE _IO(DASD_IOCTL_LETTER,1)
+/* Issue a reserve/release command, rsp. */
+#define BIODASDRSRV _IO(DASD_IOCTL_LETTER,2) /* reserve */
+#define BIODASDRLSE _IO(DASD_IOCTL_LETTER,3) /* release */
+#define BIODASDSLCK _IO(DASD_IOCTL_LETTER,4) /* steal lock */
+/* reset profiling information of a device */
+#define BIODASDPRRST _IO(DASD_IOCTL_LETTER,5)
+/* Quiesce IO on device */
+#define BIODASDQUIESCE _IO(DASD_IOCTL_LETTER,6)
+/* Resume IO on device */
+#define BIODASDRESUME _IO(DASD_IOCTL_LETTER,7)
+/* Abort all I/O on a device */
+#define BIODASDABORTIO _IO(DASD_IOCTL_LETTER, 240)
+/* Allow I/O on a device */
+#define BIODASDALLOWIO _IO(DASD_IOCTL_LETTER, 241)
+
+
+/* retrieve API version number */
+#define DASDAPIVER _IOR(DASD_IOCTL_LETTER,0,int)
+/* Get information on a dasd device */
+#define BIODASDINFO _IOR(DASD_IOCTL_LETTER,1,dasd_information_t)
+/* retrieve profiling information of a device */
+#define BIODASDPRRD _IOR(DASD_IOCTL_LETTER,2,dasd_profile_info_t)
+/* Get information on a dasd device (enhanced) */
+#define BIODASDINFO2 _IOR(DASD_IOCTL_LETTER,3,dasd_information2_t)
+/* Performance Statistics Read */
+#define BIODASDPSRD _IOR(DASD_IOCTL_LETTER,4,dasd_rssd_perf_stats_t)
+/* Get Attributes (cache operations) */
+#define BIODASDGATTR _IOR(DASD_IOCTL_LETTER,5,attrib_data_t)
+
+
+/* #define BIODASDFORMAT _IOW(IOCTL_LETTER,0,format_data_t) , deprecated */
+#define BIODASDFMT _IOW(DASD_IOCTL_LETTER,1,format_data_t)
+/* Set Attributes (cache operations) */
+#define BIODASDSATTR _IOW(DASD_IOCTL_LETTER,2,attrib_data_t)
+/* Release Allocated Space */
+#define BIODASDRAS _IOW(DASD_IOCTL_LETTER, 3, format_data_t)
+/* Swap copy pair relation */
+#define BIODASDCOPYPAIRSWAP _IOW(DASD_IOCTL_LETTER, 4, struct dasd_copypair_swap_data_t)
+
+/* Get Sense Path Group ID (SNID) data */
+#define BIODASDSNID _IOWR(DASD_IOCTL_LETTER, 1, struct dasd_snid_ioctl_data)
+/* Check device format according to format_check_t */
+#define BIODASDCHECKFMT _IOWR(DASD_IOCTL_LETTER, 2, format_check_t)
+
+#define BIODASDSYMMIO _IOWR(DASD_IOCTL_LETTER, 240, dasd_symmio_parms_t)
+
+#endif /* DASD_H */
+