diff options
Diffstat (limited to 'drivers/s390/cio/io_sch.h')
| -rw-r--r-- | drivers/s390/cio/io_sch.h | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/drivers/s390/cio/io_sch.h b/drivers/s390/cio/io_sch.h new file mode 100644 index 00000000000..8c613160bfc --- /dev/null +++ b/drivers/s390/cio/io_sch.h @@ -0,0 +1,163 @@ +#ifndef S390_IO_SCH_H +#define S390_IO_SCH_H + +#include "schid.h" + +/* + * operation request block + */ +struct 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))); + +struct io_subchannel_private { + struct orb orb; /* operation request block */ + struct ccw1 sense_ccw; /* static ccw for sense command */ +} __attribute__ ((aligned(8))); + +#define to_io_private(n) ((struct io_subchannel_private *)n->private) +#define sch_get_cdev(n) (dev_get_drvdata(&n->dev)) +#define sch_set_cdev(n, c) (dev_set_drvdata(&n->dev, c)) + +#define MAX_CIWS 8 + +/* + * sense-id response buffer layout + */ +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[MAX_CIWS]; /* variable # of CIWs */ +} __attribute__ ((packed, aligned(4))); + +struct ccw_device_private { + struct ccw_device *cdev; + struct subchannel *sch; + int state; /* device state */ + atomic_t onoff; + unsigned long registered; + struct ccw_dev_id dev_id; /* device id */ + struct subchannel_id schid; /* subchannel number */ + u8 imask; /* lpm mask for SNID/SID/SPGID */ + int iretry; /* retry counter SNID/SID/SPGID */ + struct { + unsigned int fast:1; /* post with "channel end" */ + unsigned int repall:1; /* report every interrupt status */ + unsigned int pgroup:1; /* do path grouping */ + unsigned int force:1; /* allow forced online */ + } __attribute__ ((packed)) options; + struct { + unsigned int pgid_single:1; /* use single path for Set PGID */ + unsigned int esid:1; /* Ext. SenseID supported by HW */ + unsigned int dosense:1; /* delayed SENSE required */ + unsigned int doverify:1; /* delayed path verification */ + unsigned int donotify:1; /* call notify function */ + unsigned int recog_done:1; /* dev. recog. complete */ + unsigned int fake_irb:1; /* deliver faked irb */ + unsigned int intretry:1; /* retry internal operation */ + } __attribute__((packed)) flags; + unsigned long intparm; /* user interruption parameter */ + struct qdio_irq *qdio_data; + struct irb irb; /* device status */ + struct senseid senseid; /* SenseID info */ + struct pgid pgid[8]; /* path group IDs per chpid*/ + struct ccw1 iccws[2]; /* ccws for SNID/SID/SPGID commands */ + struct work_struct kick_work; + wait_queue_head_t wait_q; + struct timer_list timer; + void *cmb; /* measurement information */ + struct list_head cmb_list; /* list of measured devices */ + u64 cmb_start_time; /* clock value of cmb reset */ + void *cmb_wait; /* deferred cmb enable/disable */ +}; + +static inline int ssch(struct subchannel_id schid, volatile struct orb *addr) +{ + register struct subchannel_id reg1 asm("1") = schid; + int ccode; + + asm volatile( + " ssch 0(%2)\n" + " ipm %0\n" + " srl %0,28" + : "=d" (ccode) : "d" (reg1), "a" (addr), "m" (*addr) : "cc"); + return ccode; +} + +static inline int rsch(struct subchannel_id schid) +{ + register struct subchannel_id reg1 asm("1") = schid; + int ccode; + + asm volatile( + " rsch\n" + " ipm %0\n" + " srl %0,28" + : "=d" (ccode) : "d" (reg1) : "cc"); + 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 hsch(struct subchannel_id schid) +{ + register struct subchannel_id reg1 asm("1") = schid; + int ccode; + + asm volatile( + " hsch\n" + " ipm %0\n" + " srl %0,28" + : "=d" (ccode) : "d" (reg1) : "cc"); + return ccode; +} + +static inline int xsch(struct subchannel_id schid) +{ + register struct subchannel_id reg1 asm("1") = schid; + int ccode; + + asm volatile( + " .insn rre,0xb2760000,%1,0\n" + " ipm %0\n" + " srl %0,28" + : "=d" (ccode) : "d" (reg1) : "cc"); + return ccode; +} + +#endif |