1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef S390_CIO_H 3#define S390_CIO_H 4 5#include <linux/mutex.h> 6#include <linux/device.h> 7#include <linux/mod_devicetable.h> 8#include <asm/chpid.h> 9#include <asm/cio.h> 10#include <asm/fcx.h> 11#include <asm/schid.h> 12#include "chsc.h" 13 14/* 15 * path management control word 16 */ 17struct pmcw { 18 u32 intparm; /* interruption parameter */ 19 u32 qf : 1; /* qdio facility */ 20 u32 w : 1; 21 u32 isc : 3; /* interruption sublass */ 22 u32 res5 : 3; /* reserved zeros */ 23 u32 ena : 1; /* enabled */ 24 u32 lm : 2; /* limit mode */ 25 u32 mme : 2; /* measurement-mode enable */ 26 u32 mp : 1; /* multipath mode */ 27 u32 tf : 1; /* timing facility */ 28 u32 dnv : 1; /* device number valid */ 29 u32 dev : 16; /* device number */ 30 u8 lpm; /* logical path mask */ 31 u8 pnom; /* path not operational mask */ 32 u8 lpum; /* last path used mask */ 33 u8 pim; /* path installed mask */ 34 u16 mbi; /* measurement-block index */ 35 u8 pom; /* path operational mask */ 36 u8 pam; /* path available mask */ 37 u8 chpid[8]; /* CHPID 0-7 (if available) */ 38 u32 unused1 : 8; /* reserved zeros */ 39 u32 st : 3; /* subchannel type */ 40 u32 unused2 : 18; /* reserved zeros */ 41 u32 mbfc : 1; /* measurement block format control */ 42 u32 xmwme : 1; /* extended measurement word mode enable */ 43 u32 csense : 1; /* concurrent sense; can be enabled ...*/ 44 /* ... per MSCH, however, if facility */ 45 /* ... is not installed, this results */ 46 /* ... in an operand exception. */ 47} __attribute__ ((packed)); 48 49/* I/O-Interruption Code as stored by TEST PENDING INTERRUPTION (TPI). */ 50struct tpi_info { 51 struct subchannel_id schid; 52 u32 intparm; 53 u32 adapter_IO:1; 54 u32 directed_irq:1; 55 u32 isc:3; 56 u32 :27; 57 u32 type:3; 58 u32 :12; 59} __packed __aligned(4); 60 61/* Target SCHIB configuration. */ 62struct schib_config { 63 u64 mba; 64 u32 intparm; 65 u16 mbi; 66 u32 isc:3; 67 u32 ena:1; 68 u32 mme:2; 69 u32 mp:1; 70 u32 csense:1; 71 u32 mbfc:1; 72} __attribute__ ((packed)); 73 74/* 75 * subchannel information block 76 */ 77struct schib { 78 struct pmcw pmcw; /* path management control word */ 79 union scsw scsw; /* subchannel status word */ 80 __u64 mba; /* measurement block address */ 81 __u8 mda[4]; /* model dependent area */ 82} __attribute__ ((packed,aligned(4))); 83 84/* 85 * When rescheduled, todo's with higher values will overwrite those 86 * with lower values. 87 */ 88enum sch_todo { 89 SCH_TODO_NOTHING, 90 SCH_TODO_EVAL, 91 SCH_TODO_UNREG, 92}; 93 94/* subchannel data structure used by I/O subroutines */ 95struct subchannel { 96 struct subchannel_id schid; 97 spinlock_t *lock; /* subchannel lock */ 98 struct mutex reg_mutex; 99 enum { 100 SUBCHANNEL_TYPE_IO = 0, 101 SUBCHANNEL_TYPE_CHSC = 1, 102 SUBCHANNEL_TYPE_MSG = 2, 103 SUBCHANNEL_TYPE_ADM = 3, 104 } st; /* subchannel type */ 105 __u8 vpm; /* verified path mask */ 106 __u8 lpm; /* logical path mask */ 107 __u8 opm; /* operational path mask */ 108 struct schib schib; /* subchannel information block */ 109 int isc; /* desired interruption subclass */ 110 struct chsc_ssd_info ssd_info; /* subchannel description */ 111 struct device dev; /* entry in device tree */ 112 struct css_driver *driver; 113 enum sch_todo todo; 114 struct work_struct todo_work; 115 struct schib_config config; 116 u64 dma_mask; 117 char *driver_override; /* Driver name to force a match */ 118} __attribute__ ((aligned(8))); 119 120DECLARE_PER_CPU_ALIGNED(struct irb, cio_irb); 121 122#define to_subchannel(n) container_of(n, struct subchannel, dev) 123 124extern int cio_enable_subchannel(struct subchannel *, u32); 125extern int cio_disable_subchannel (struct subchannel *); 126extern int cio_cancel (struct subchannel *); 127extern int cio_clear (struct subchannel *); 128extern int cio_cancel_halt_clear(struct subchannel *, int *); 129extern int cio_resume (struct subchannel *); 130extern int cio_halt (struct subchannel *); 131extern int cio_start (struct subchannel *, struct ccw1 *, __u8); 132extern int cio_start_key (struct subchannel *, struct ccw1 *, __u8, __u8); 133extern int cio_set_options (struct subchannel *, int); 134extern int cio_update_schib(struct subchannel *sch); 135extern int cio_commit_config(struct subchannel *sch); 136 137int cio_tm_start_key(struct subchannel *sch, struct tcw *tcw, u8 lpm, u8 key); 138int cio_tm_intrg(struct subchannel *sch); 139 140extern int __init airq_init(void); 141 142/* Use with care. */ 143#ifdef CONFIG_CCW_CONSOLE 144extern struct subchannel *cio_probe_console(void); 145extern int cio_is_console(struct subchannel_id); 146extern void cio_register_early_subchannels(void); 147extern void cio_tsch(struct subchannel *sch); 148#else 149#define cio_is_console(schid) 0 150static inline void cio_register_early_subchannels(void) {} 151#endif 152 153#endif 154