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Diffstat (limited to '')
| -rw-r--r-- | arch/s390/include/uapi/asm/dasd.h | 334 |
1 files changed, 334 insertions, 0 deletions
diff --git a/arch/s390/include/uapi/asm/dasd.h b/arch/s390/include/uapi/asm/dasd.h new file mode 100644 index 000000000..832be5c25 --- /dev/null +++ b/arch/s390/include/uapi/asm/dasd.h @@ -0,0 +1,334 @@ +/* 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; + +/* + * 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 */ + +/* + * 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) + +/* 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 */ + |