| /* | |
| * File...........: linux/drivers/s390/block/dasd.c | |
| * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> | |
| * Bugreports.to..: <Linux390@de.ibm.com> | |
| * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000 | |
| * | |
| * 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/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 | |
| * 0x00: default features | |
| * 0x01: readonly (ro) | |
| * 0x02: use diag discipline (diag) | |
| * 0x04: set the device initially online (internal use only) | |
| * 0x08: enable ERP related logging | |
| */ | |
| #define DASD_FEATURE_DEFAULT 0x00 | |
| #define DASD_FEATURE_READONLY 0x01 | |
| #define DASD_FEATURE_USEDIAG 0x02 | |
| #define DASD_FEATURE_INITIAL_ONLINE 0x04 | |
| #define DASD_FEATURE_ERPLOG 0x08 | |
| #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 { | |
| int start_unit; /* from track */ | |
| int stop_unit; /* to track */ | |
| int blksize; /* sectorsize */ | |
| 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 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 | |
| /******************************************************************************** | |
| * 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) | |
| /* 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) | |
| #endif /* DASD_H */ | |
| /* | |
| * Overrides for Emacs so that we follow Linus's tabbing style. | |
| * Emacs will notice this stuff at the end of the file and automatically | |
| * adjust the settings for this buffer only. This must remain at the end | |
| * of the file. | |
| * --------------------------------------------------------------------------- | |
| * Local variables: | |
| * c-indent-level: 4 | |
| * c-brace-imaginary-offset: 0 | |
| * c-brace-offset: -4 | |
| * c-argdecl-indent: 4 | |
| * c-label-offset: -4 | |
| * c-continued-statement-offset: 4 | |
| * c-continued-brace-offset: 0 | |
| * indent-tabs-mode: nil | |
| * tab-width: 8 | |
| * End: | |
| */ |