| /* |
| * arch/s390/kernel/s390io.h |
| * |
| * S390 version |
| * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation |
| * Author(s): Ingo Adlung (adlung@de.ibm.com) |
| */ |
| |
| #ifndef __s390io_h |
| #define __s390io_h |
| |
| /* |
| * IRQ data structure used by I/O subroutines |
| * |
| * Note : If bit flags are added, the "unused" value must be |
| * decremented accordingly ! |
| */ |
| typedef struct _ioinfo { |
| unsigned int irq; /* aka. subchannel number */ |
| spinlock_t irq_lock; /* irq lock */ |
| |
| struct _ioinfo *prev; |
| struct _ioinfo *next; |
| |
| union { |
| unsigned int info; |
| struct { |
| unsigned int busy : 1; /* device currently in use */ |
| unsigned int oper : 1; /* device is operational */ |
| unsigned int fast : 1; /* post with "channel end", ... */ |
| /* ... don't wait for "device end" */ |
| /* ... from do_IO() parameters */ |
| unsigned int ready : 1; /* interrupt handler registered */ |
| unsigned int haltio : 1; /* halt_IO in process */ |
| unsigned int doio : 1; /* do_IO in process */ |
| unsigned int doio_q : 1; /* do_IO queued - only possible ... */ |
| /* ... if 'fast' is set too */ |
| unsigned int w4final : 1; /* wait for final status, internally */ |
| /* ... used with 'fast' setting only */ |
| unsigned int repall : 1; /* report every interrupt status */ |
| unsigned int unready : 1; /* deregister irq handler in process */ |
| unsigned int d_disable : 1; /* delayed disabling required */ |
| unsigned int w4sense : 1; /* SENSE status pending */ |
| unsigned int syncio : 1; /* synchronous I/O requested */ |
| unsigned int consns : 1; /* concurrent sense is available */ |
| unsigned int delsense : 1; /* delayed SENSE required */ |
| unsigned int s_pend : 1; /* status pending condition */ |
| unsigned int pgid : 1; /* "path group ID" is valid */ |
| unsigned int pgid_supp : 1; /* "path group ID" command is supported */ |
| unsigned int esid : 1; /* Ext. SenseID supported by HW */ |
| unsigned int rcd : 1; /* RCD supported by HW */ |
| unsigned int repnone : 1; /* don't call IRQ handler on interrupt */ |
| unsigned int newreq : 1; /* new register interface */ |
| unsigned int dval : 1; /* device number valid */ |
| unsigned int unknown : 1; /* unknown device - if SenseID failed */ |
| unsigned int unused : (sizeof(unsigned int)*8 - 24); /* unused */ |
| } __attribute__ ((packed)) flags; |
| } ui; |
| |
| unsigned long u_intparm; /* user interruption parameter */ |
| senseid_t senseid; /* SenseID info */ |
| irq_desc_t irq_desc; /* irq descriptor */ |
| not_oper_handler_func_t nopfunc; /* not oper handler */ |
| __u8 ulpm; /* logical path mask used for I/O */ |
| __u8 opm; /* path mask of operational paths */ |
| __u16 devno; /* device number */ |
| pgid_t pgid; /* path group ID */ |
| schib_t schib; /* subchannel information block */ |
| orb_t orb; /* operation request block */ |
| devstat_t devstat; /* device status */ |
| ccw1_t *qcpa; /* queued channel program */ |
| ccw1_t senseccw; /* ccw for sense command */ |
| __u8 sense_data[32];/* buffer for basic sense */ |
| unsigned int stctl; /* accumulated status control from irb */ |
| unsigned long qintparm; /* queued interruption parameter */ |
| unsigned long qflag; /* queued flags */ |
| __u8 qlpm; /* queued logical path mask */ |
| |
| } __attribute__ ((aligned(8))) ioinfo_t; |
| |
| #define IOINFO_FLAGS_BUSY 0x80000000 |
| #define IOINFO_FLAGS_OPER 0x40000000 |
| #define IOINFO_FLAGS_FAST 0x20000000 |
| #define IOINFO_FLAGS_READY 0x10000000 |
| #define IOINFO_FLAGS_HALTIO 0x08000000 |
| #define IOINFO_FLAGS_DOIO 0x04000000 |
| #define IOINFO_FLAGS_DOIO_Q 0x02000000 |
| #define IOINFO_FLAGS_W4FINAL 0x01000000 |
| #define IOINFO_FLAGS_REPALL 0x00800000 |
| |
| extern ioinfo_t *ioinfo[]; |
| |
| #endif /* __s390io_h */ |
| |
