| /* |
| * Channel IO definitions |
| * |
| * Copyright (c) 2013 Alexander Graf <agraf@suse.de> |
| * |
| * Inspired by various s390 headers in Linux 3.9. |
| * |
| * This work is licensed under the terms of the GNU GPL, version 2 or (at |
| * your option) any later version. See the COPYING file in the top-level |
| * directory. |
| */ |
| |
| #ifndef CIO_H |
| #define CIO_H |
| |
| /* |
| * path management control word |
| */ |
| struct pmcw { |
| u32 intparm; /* interruption parameter */ |
| u32 qf:1; /* qdio facility */ |
| u32 w:1; |
| u32 isc:3; /* interruption subclass */ |
| u32 res5:3; /* reserved zeros */ |
| u32 ena:1; /* enabled */ |
| u32 lm:2; /* limit mode */ |
| u32 mme:2; /* measurement-mode enable */ |
| u32 mp:1; /* multipath mode */ |
| u32 tf:1; /* timing facility */ |
| u32 dnv:1; /* device number valid */ |
| u32 dev:16; /* device number */ |
| u8 lpm; /* logical path mask */ |
| u8 pnom; /* path not operational mask */ |
| u8 lpum; /* last path used mask */ |
| u8 pim; /* path installed mask */ |
| u16 mbi; /* measurement-block index */ |
| u8 pom; /* path operational mask */ |
| u8 pam; /* path available mask */ |
| u8 chpid[8]; /* CHPID 0-7 (if available) */ |
| u32 unused1:8; /* reserved zeros */ |
| u32 st:3; /* subchannel type */ |
| u32 unused2:18; /* reserved zeros */ |
| u32 mbfc:1; /* measurement block format control */ |
| u32 xmwme:1; /* extended measurement word mode enable */ |
| u32 csense:1; /* concurrent sense; can be enabled ...*/ |
| /* ... per MSCH, however, if facility */ |
| /* ... is not installed, this results */ |
| /* ... in an operand exception. */ |
| } __attribute__ ((packed)); |
| |
| /* Target SCHIB configuration. */ |
| struct schib_config { |
| u64 mba; |
| u32 intparm; |
| u16 mbi; |
| u32 isc:3; |
| u32 ena:1; |
| u32 mme:2; |
| u32 mp:1; |
| u32 csense:1; |
| u32 mbfc:1; |
| } __attribute__ ((packed)); |
| |
| struct scsw { |
| u16 flags; |
| u16 ctrl; |
| u32 cpa; |
| u8 dstat; |
| u8 cstat; |
| u16 count; |
| } __attribute__ ((packed)); |
| |
| /* Function Control */ |
| #define SCSW_FCTL_START_FUNC 0x4000 |
| #define SCSW_FCTL_HALT_FUNC 0x2000 |
| #define SCSW_FCTL_CLEAR_FUNC 0x1000 |
| |
| /* Activity Control */ |
| #define SCSW_ACTL_RESUME_PEND 0x0800 |
| #define SCSW_ACTL_START_PEND 0x0400 |
| #define SCSW_ACTL_HALT_PEND 0x0200 |
| #define SCSW_ACTL_CLEAR_PEND 0x0100 |
| #define SCSW_ACTL_CH_ACTIVE 0x0080 |
| #define SCSW_ACTL_DEV_ACTIVE 0x0040 |
| #define SCSW_ACTL_SUSPENDED 0x0020 |
| |
| /* Status Control */ |
| #define SCSW_SCTL_ALERT 0x0010 |
| #define SCSW_SCTL_INTERMED 0x0008 |
| #define SCSW_SCTL_PRIMARY 0x0004 |
| #define SCSW_SCTL_SECONDARY 0x0002 |
| #define SCSW_SCTL_STATUS_PEND 0x0001 |
| |
| /* SCSW Device Status Flags */ |
| #define SCSW_DSTAT_ATTN 0x80 |
| #define SCSW_DSTAT_STATMOD 0x40 |
| #define SCSW_DSTAT_CUEND 0x20 |
| #define SCSW_DSTAT_BUSY 0x10 |
| #define SCSW_DSTAT_CHEND 0x08 |
| #define SCSW_DSTAT_DEVEND 0x04 |
| #define SCSW_DSTAT_UCHK 0x02 |
| #define SCSW_DSTAT_UEXCP 0x01 |
| |
| /* SCSW Subchannel Status Flags */ |
| #define SCSW_CSTAT_PCINT 0x80 |
| #define SCSW_CSTAT_BADLEN 0x40 |
| #define SCSW_CSTAT_PROGCHK 0x20 |
| #define SCSW_CSTAT_PROTCHK 0x10 |
| #define SCSW_CSTAT_CHDCHK 0x08 |
| #define SCSW_CSTAT_CHCCHK 0x04 |
| #define SCSW_CSTAT_ICCHK 0x02 |
| #define SCSW_CSTAT_CHAINCHK 0x01 |
| |
| /* |
| * subchannel information block |
| */ |
| typedef struct schib { |
| struct pmcw pmcw; /* path management control word */ |
| struct scsw scsw; /* subchannel status word */ |
| u64 mba; /* measurement block address */ |
| u8 mda[4]; /* model dependent area */ |
| } __attribute__ ((packed, aligned(4))) Schib; |
| |
| typedef struct subchannel_id { |
| union { |
| struct { |
| u16 cssid:8; |
| u16 reserved:4; |
| u16 m:1; |
| u16 ssid:2; |
| u16 one:1; |
| }; |
| u16 sch_id; |
| }; |
| u16 sch_no; |
| } __attribute__ ((packed, aligned(4))) SubChannelId; |
| |
| struct chsc_header { |
| u16 length; |
| u16 code; |
| } __attribute__((packed)); |
| |
| typedef struct chsc_area_sda { |
| struct chsc_header request; |
| u8 reserved1:4; |
| u8 format:4; |
| u8 reserved2; |
| u16 operation_code; |
| u32 reserved3; |
| u32 reserved4; |
| u32 operation_data_area[252]; |
| struct chsc_header response; |
| u32 reserved5:4; |
| u32 format2:4; |
| u32 reserved6:24; |
| } __attribute__((packed)) ChscAreaSda; |
| |
| /* |
| * TPI info structure |
| */ |
| struct tpi_info { |
| struct subchannel_id schid; |
| u32 intparm; /* interruption parameter */ |
| u32 adapter_IO:1; |
| u32 reserved2:1; |
| u32 isc:3; |
| u32 reserved3:12; |
| u32 int_type:3; |
| u32 reserved4:12; |
| } __attribute__ ((packed, aligned(4))); |
| |
| /* channel command word (format 0) */ |
| typedef struct ccw0 { |
| u8 cmd_code; |
| u32 cda:24; |
| u32 chainData:1; |
| u32 chain:1; |
| u32 sli:1; |
| u32 skip:1; |
| u32 pci:1; |
| u32 ida:1; |
| u32 suspend:1; |
| u32 mida:1; |
| u8 reserved; |
| u16 count; |
| } __attribute__ ((packed, aligned(8))) Ccw0; |
| |
| /* channel command word (format 1) */ |
| typedef struct ccw1 { |
| u8 cmd_code; |
| u8 flags; |
| u16 count; |
| u32 cda; |
| } __attribute__ ((packed, aligned(8))) Ccw1; |
| |
| /* do_cio() CCW formats */ |
| #define CCW_FMT0 0x00 |
| #define CCW_FMT1 0x01 |
| |
| #define CCW_FLAG_DC 0x80 |
| #define CCW_FLAG_CC 0x40 |
| #define CCW_FLAG_SLI 0x20 |
| #define CCW_FLAG_SKIP 0x10 |
| #define CCW_FLAG_PCI 0x08 |
| #define CCW_FLAG_IDA 0x04 |
| #define CCW_FLAG_SUSPEND 0x02 |
| |
| /* Common CCW commands */ |
| #define CCW_CMD_READ_IPL 0x02 |
| #define CCW_CMD_NOOP 0x03 |
| #define CCW_CMD_BASIC_SENSE 0x04 |
| #define CCW_CMD_TIC 0x08 |
| #define CCW_CMD_SENSE_ID 0xe4 |
| |
| /* Virtio CCW commands */ |
| #define CCW_CMD_SET_VQ 0x13 |
| #define CCW_CMD_VDEV_RESET 0x33 |
| #define CCW_CMD_READ_FEAT 0x12 |
| #define CCW_CMD_WRITE_FEAT 0x11 |
| #define CCW_CMD_READ_CONF 0x22 |
| #define CCW_CMD_WRITE_CONF 0x21 |
| #define CCW_CMD_WRITE_STATUS 0x31 |
| #define CCW_CMD_SET_IND 0x43 |
| #define CCW_CMD_SET_CONF_IND 0x53 |
| #define CCW_CMD_READ_VQ_CONF 0x32 |
| |
| /* DASD CCW commands */ |
| #define CCW_CMD_DASD_READ 0x06 |
| #define CCW_CMD_DASD_SEEK 0x07 |
| #define CCW_CMD_DASD_SEARCH_ID_EQ 0x31 |
| #define CCW_CMD_DASD_READ_MT 0x86 |
| |
| /* |
| * Command-mode operation request block |
| */ |
| typedef struct cmd_orb { |
| u32 intparm; /* interruption parameter */ |
| u32 key:4; /* flags, like key, suspend control, etc. */ |
| u32 spnd:1; /* suspend control */ |
| u32 res1:1; /* reserved */ |
| u32 mod:1; /* modification control */ |
| u32 sync:1; /* synchronize control */ |
| u32 fmt:1; /* format control */ |
| u32 pfch:1; /* prefetch control */ |
| u32 isic:1; /* initial-status-interruption control */ |
| u32 alcc:1; /* address-limit-checking control */ |
| u32 ssic:1; /* suppress-suspended-interr. control */ |
| u32 res2:1; /* reserved */ |
| u32 c64:1; /* IDAW/QDIO 64 bit control */ |
| u32 i2k:1; /* IDAW 2/4kB block size control */ |
| u32 lpm:8; /* logical path mask */ |
| u32 ils:1; /* incorrect length */ |
| u32 zero:6; /* reserved zeros */ |
| u32 orbx:1; /* ORB extension control */ |
| u32 cpa; /* channel program address */ |
| } __attribute__ ((packed, aligned(4))) CmdOrb; |
| |
| struct ciw { |
| u8 type; |
| u8 command; |
| u16 count; |
| }; |
| |
| #define CU_TYPE_UNKNOWN 0x0000 |
| #define CU_TYPE_DASD_2107 0x2107 |
| #define CU_TYPE_VIRTIO 0x3832 |
| #define CU_TYPE_DASD_3990 0x3990 |
| |
| /* |
| * sense-id response buffer layout |
| */ |
| typedef struct senseid { |
| /* common part */ |
| u8 reserved; /* always 0x'FF' */ |
| u16 cu_type; /* control unit type */ |
| u8 cu_model; /* control unit model */ |
| u16 dev_type; /* device type */ |
| u8 dev_model; /* device model */ |
| u8 unused; /* padding byte */ |
| /* extended part */ |
| struct ciw ciw[62]; |
| } __attribute__ ((packed, aligned(4))) SenseId; |
| |
| /* |
| * architected values for first sense byte - common_status. Bits 0-5 of this |
| * field are common to all device types. |
| */ |
| #define SNS_STAT0_CMD_REJECT 0x80 |
| #define SNS_STAT0_INTERVENTION_REQ 0x40 |
| #define SNS_STAT0_BUS_OUT_CHECK 0x20 |
| #define SNS_STAT0_EQUIPMENT_CHECK 0x10 |
| #define SNS_STAT0_DATA_CHECK 0x08 |
| #define SNS_STAT0_OVERRUN 0x04 |
| #define SNS_STAT0_INCOMPL_DOMAIN 0x01 |
| |
| /* ECKD DASD status[0] byte */ |
| #define SNS_STAT1_PERM_ERR 0x80 |
| #define SNS_STAT1_INV_TRACK_FORMAT 0x40 |
| #define SNS_STAT1_EOC 0x20 |
| #define SNS_STAT1_MESSAGE_TO_OPER 0x10 |
| #define SNS_STAT1_NO_REC_FOUND 0x08 |
| #define SNS_STAT1_FILE_PROTECTED 0x04 |
| #define SNS_STAT1_WRITE_INHIBITED 0x02 |
| #define SNS_STAT1_IMPRECISE_END 0x01 |
| |
| /* ECKD DASD status[1] byte */ |
| #define SNS_STAT2_REQ_INH_WRITE 0x80 |
| #define SNS_STAT2_CORRECTABLE 0x40 |
| #define SNS_STAT2_FIRST_LOG_ERR 0x20 |
| #define SNS_STAT2_ENV_DATA_PRESENT 0x10 |
| #define SNS_STAT2_IMPRECISE_END 0x04 |
| |
| /* ECKD DASD 24-byte Sense fmt_msg codes */ |
| #define SENSE24_FMT_PROG_SYS 0x0 |
| #define SENSE24_FMT_EQUIPMENT 0x2 |
| #define SENSE24_FMT_CONTROLLER 0x3 |
| #define SENSE24_FMT_MISC 0xF |
| |
| /* basic sense response buffer layout */ |
| typedef struct SenseDataEckdDasd { |
| uint8_t common_status; |
| uint8_t status[2]; |
| uint8_t res_count; |
| uint8_t phys_drive_id; |
| uint8_t low_cyl_addr; |
| uint8_t head_high_cyl_addr; |
| uint8_t fmt_msg; |
| uint64_t fmt_dependent_info[2]; |
| uint8_t reserved; |
| uint8_t program_action_code; |
| uint16_t config_info; |
| uint8_t mcode_hicyl; |
| uint8_t cyl_head_addr[3]; |
| } __attribute__ ((packed, aligned(4))) SenseDataEckdDasd; |
| |
| #define ECKD_SENSE24_GET_FMT(sd) (sd->fmt_msg & 0xF0 >> 4) |
| #define ECKD_SENSE24_GET_MSG(sd) (sd->fmt_msg & 0x0F) |
| |
| #define unit_check(irb) ((irb)->scsw.dstat & SCSW_DSTAT_UCHK) |
| #define iface_ctrl_check(irb) ((irb)->scsw.cstat & SCSW_CSTAT_ICCHK) |
| |
| /* interruption response block */ |
| typedef struct irb { |
| struct scsw scsw; |
| u32 esw[5]; |
| u32 ecw[8]; |
| u32 emw[8]; |
| } __attribute__ ((packed, aligned(4))) Irb; |
| |
| /* Used for SEEK ccw commands */ |
| typedef struct CcwSeekData { |
| uint16_t reserved; |
| uint16_t cyl; |
| uint16_t head; |
| } __attribute__((packed)) CcwSeekData; |
| |
| /* Used for SEARCH ID ccw commands */ |
| typedef struct CcwSearchIdData { |
| uint16_t cyl; |
| uint16_t head; |
| uint8_t record; |
| } __attribute__((packed)) CcwSearchIdData; |
| |
| int enable_mss_facility(void); |
| void enable_subchannel(SubChannelId schid); |
| uint16_t cu_type(SubChannelId schid); |
| int basic_sense(SubChannelId schid, uint16_t cutype, void *sense_data, |
| uint16_t data_size); |
| int do_cio(SubChannelId schid, uint16_t cutype, uint32_t ccw_addr, int fmt); |
| |
| /* |
| * Some S390 specific IO instructions as inline |
| */ |
| |
| static inline int stsch_err(struct subchannel_id schid, struct schib *addr) |
| { |
| register struct subchannel_id reg1 asm ("1") = schid; |
| int ccode = -EIO; |
| |
| asm volatile( |
| " stsch 0(%3)\n" |
| "0: ipm %0\n" |
| " srl %0,28\n" |
| "1:\n" |
| : "+d" (ccode), "=m" (*addr) |
| : "d" (reg1), "a" (addr) |
| : "cc"); |
| return ccode; |
| } |
| |
| static inline int msch(struct subchannel_id schid, struct schib *addr) |
| { |
| register struct subchannel_id reg1 asm ("1") = schid; |
| int ccode; |
| |
| asm volatile( |
| " msch 0(%2)\n" |
| " ipm %0\n" |
| " srl %0,28" |
| : "=d" (ccode) |
| : "d" (reg1), "a" (addr), "m" (*addr) |
| : "cc"); |
| return ccode; |
| } |
| |
| static inline int msch_err(struct subchannel_id schid, struct schib *addr) |
| { |
| register struct subchannel_id reg1 asm ("1") = schid; |
| int ccode = -EIO; |
| |
| asm volatile( |
| " msch 0(%2)\n" |
| "0: ipm %0\n" |
| " srl %0,28\n" |
| "1:\n" |
| : "+d" (ccode) |
| : "d" (reg1), "a" (addr), "m" (*addr) |
| : "cc"); |
| return ccode; |
| } |
| |
| static inline int tsch(struct subchannel_id schid, struct irb *addr) |
| { |
| register struct subchannel_id reg1 asm ("1") = schid; |
| int ccode; |
| |
| asm volatile( |
| " tsch 0(%3)\n" |
| " ipm %0\n" |
| " srl %0,28" |
| : "=d" (ccode), "=m" (*addr) |
| : "d" (reg1), "a" (addr) |
| : "cc"); |
| return ccode; |
| } |
| |
| static inline int ssch(struct subchannel_id schid, struct cmd_orb *addr) |
| { |
| register struct subchannel_id reg1 asm("1") = schid; |
| int ccode = -EIO; |
| |
| asm volatile( |
| " ssch 0(%2)\n" |
| "0: ipm %0\n" |
| " srl %0,28\n" |
| "1:\n" |
| : "+d" (ccode) |
| : "d" (reg1), "a" (addr), "m" (*addr) |
| : "cc", "memory"); |
| return ccode; |
| } |
| |
| static inline int csch(struct subchannel_id schid) |
| { |
| register struct subchannel_id reg1 asm("1") = schid; |
| int ccode; |
| |
| asm volatile( |
| " csch\n" |
| " ipm %0\n" |
| " srl %0,28" |
| : "=d" (ccode) |
| : "d" (reg1) |
| : "cc"); |
| return ccode; |
| } |
| |
| static inline int tpi(struct tpi_info *addr) |
| { |
| int ccode; |
| |
| asm volatile( |
| " tpi 0(%2)\n" |
| " ipm %0\n" |
| " srl %0,28" |
| : "=d" (ccode), "=m" (*addr) |
| : "a" (addr) |
| : "cc"); |
| return ccode; |
| } |
| |
| static inline int chsc(void *chsc_area) |
| { |
| typedef struct { char _[4096]; } addr_type; |
| int cc; |
| |
| asm volatile( |
| " .insn rre,0xb25f0000,%2,0\n" |
| " ipm %0\n" |
| " srl %0,28\n" |
| : "=d" (cc), "=m" (*(addr_type *) chsc_area) |
| : "d" (chsc_area), "m" (*(addr_type *) chsc_area) |
| : "cc"); |
| return cc; |
| } |
| |
| #endif /* CIO_H */ |
