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/*
* 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 sublass */
__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));
#define SCSW_FCTL_CLEAR_FUNC 0x1000
#define SCSW_FCTL_HALT_FUNC 0x2000
#define SCSW_FCTL_START_FUNC 0x4000
/*
* 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 {
__u32 cssid:8;
__u32:4;
__u32 m:1;
__u32 ssid:2;
__u32 one:1;
__u32 sch_no:16;
} __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 (type 1) */
typedef struct ccw1 {
__u8 cmd_code;
__u8 flags;
__u16 count;
__u32 cda;
} __attribute__ ((packed, aligned(8))) Ccw1;
#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
#define CCW_CMD_NOOP 0x03
#define CCW_CMD_BASIC_SENSE 0x04
#define CCW_CMD_TIC 0x08
#define CCW_CMD_SENSE_ID 0xe4
#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
/*
* 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;
};
/*
* 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;
/* interruption response block */
typedef struct irb {
struct scsw scsw;
__u32 esw[5];
__u32 ecw[8];
__u32 emw[8];
} __attribute__ ((packed, aligned(4))) Irb;
int enable_mss_facility(void);
void enable_subchannel(SubChannelId schid);
/*
* 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 */
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