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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef S390_CIO_H
2#define S390_CIO_H
3
Cornelia Huck6ab48792006-07-12 16:39:50 +02004#include <linux/mutex.h>
Peter Oberparleitere5854a52007-04-27 16:01:31 +02005#include <linux/device.h>
Cornelia Huck7e9db9e2008-07-14 09:58:44 +02006#include <linux/mod_devicetable.h>
Peter Oberparleiter7ad6a242007-04-27 16:01:35 +02007#include <asm/chpid.h>
Peter Oberparleiter83262d62008-07-14 09:58:51 +02008#include <asm/cio.h>
9#include <asm/fcx.h>
Cornelia Huck9d92a7e2008-07-14 09:59:05 +020010#include <asm/schid.h>
Peter Oberparleiter7ad6a242007-04-27 16:01:35 +020011#include "chsc.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070012
13/*
14 * path management control word
15 */
16struct pmcw {
Cornelia Huckcd6b4f22008-01-26 14:10:43 +010017 u32 intparm; /* interruption parameter */
18 u32 qf : 1; /* qdio facility */
Cornelia Huckb3a686f2008-07-14 09:58:48 +020019 u32 w : 1;
Cornelia Huckcd6b4f22008-01-26 14:10:43 +010020 u32 isc : 3; /* interruption sublass */
21 u32 res5 : 3; /* reserved zeros */
22 u32 ena : 1; /* enabled */
23 u32 lm : 2; /* limit mode */
24 u32 mme : 2; /* measurement-mode enable */
25 u32 mp : 1; /* multipath mode */
26 u32 tf : 1; /* timing facility */
27 u32 dnv : 1; /* device number valid */
28 u32 dev : 16; /* device number */
29 u8 lpm; /* logical path mask */
30 u8 pnom; /* path not operational mask */
31 u8 lpum; /* last path used mask */
32 u8 pim; /* path installed mask */
33 u16 mbi; /* measurement-block index */
34 u8 pom; /* path operational mask */
35 u8 pam; /* path available mask */
36 u8 chpid[8]; /* CHPID 0-7 (if available) */
37 u32 unused1 : 8; /* reserved zeros */
38 u32 st : 3; /* subchannel type */
39 u32 unused2 : 18; /* reserved zeros */
40 u32 mbfc : 1; /* measurement block format control */
41 u32 xmwme : 1; /* extended measurement word mode enable */
42 u32 csense : 1; /* concurrent sense; can be enabled ...*/
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 /* ... per MSCH, however, if facility */
44 /* ... is not installed, this results */
45 /* ... in an operand exception. */
46} __attribute__ ((packed));
47
Sebastian Ott13952ec2008-12-25 13:39:13 +010048/* Target SCHIB configuration. */
49struct schib_config {
50 u64 mba;
51 u32 intparm;
52 u16 mbi;
53 u32 isc:3;
54 u32 ena:1;
55 u32 mme:2;
56 u32 mp:1;
57 u32 csense:1;
58 u32 mbfc:1;
59} __attribute__ ((packed));
60
Linus Torvalds1da177e2005-04-16 15:20:36 -070061/*
62 * subchannel information block
63 */
64struct schib {
65 struct pmcw pmcw; /* path management control word */
Peter Oberparleiter23d805b2008-07-14 09:58:50 +020066 union scsw scsw; /* subchannel status word */
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 __u64 mba; /* measurement block address */
68 __u8 mda[4]; /* model dependent area */
69} __attribute__ ((packed,aligned(4)));
70
Sebastian Ott817e5002011-12-01 13:32:19 +010071/*
72 * When rescheduled, todo's with higher values will overwrite those
73 * with lower values.
74 */
Peter Oberparleiter390935a2009-12-07 12:51:18 +010075enum sch_todo {
76 SCH_TODO_NOTHING,
Sebastian Ott817e5002011-12-01 13:32:19 +010077 SCH_TODO_EVAL,
Peter Oberparleiter390935a2009-12-07 12:51:18 +010078 SCH_TODO_UNREG,
79};
80
Linus Torvalds1da177e2005-04-16 15:20:36 -070081/* subchannel data structure used by I/O subroutines */
82struct subchannel {
Cornelia Hucka8237fc2006-01-06 00:19:21 -080083 struct subchannel_id schid;
Cornelia Huck2ec22982006-12-08 15:54:26 +010084 spinlock_t *lock; /* subchannel lock */
Cornelia Huck6ab48792006-07-12 16:39:50 +020085 struct mutex reg_mutex;
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 enum {
87 SUBCHANNEL_TYPE_IO = 0,
88 SUBCHANNEL_TYPE_CHSC = 1,
Cornelia Huckb279a4f2008-01-26 14:10:45 +010089 SUBCHANNEL_TYPE_MSG = 2,
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 SUBCHANNEL_TYPE_ADM = 3,
91 } st; /* subchannel type */
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 __u8 vpm; /* verified path mask */
93 __u8 lpm; /* logical path mask */
94 __u8 opm; /* operational path mask */
95 struct schib schib; /* subchannel information block */
Cornelia Huckedf22092008-04-30 13:38:39 +020096 int isc; /* desired interruption subclass */
Peter Oberparleiter7ad6a242007-04-27 16:01:35 +020097 struct chsc_ssd_info ssd_info; /* subchannel description */
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 struct device dev; /* entry in device tree */
99 struct css_driver *driver;
Peter Oberparleiter390935a2009-12-07 12:51:18 +0100100 enum sch_todo todo;
101 struct work_struct todo_work;
Sebastian Ott13952ec2008-12-25 13:39:13 +0100102 struct schib_config config;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103} __attribute__ ((aligned(8)));
104
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105#define to_subchannel(n) container_of(n, struct subchannel, dev)
106
Cornelia Hucka8237fc2006-01-06 00:19:21 -0800107extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id);
Cornelia Huckedf22092008-04-30 13:38:39 +0200108extern int cio_enable_subchannel(struct subchannel *, u32);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109extern int cio_disable_subchannel (struct subchannel *);
110extern int cio_cancel (struct subchannel *);
111extern int cio_clear (struct subchannel *);
112extern int cio_resume (struct subchannel *);
113extern int cio_halt (struct subchannel *);
114extern int cio_start (struct subchannel *, struct ccw1 *, __u8);
115extern int cio_start_key (struct subchannel *, struct ccw1 *, __u8, __u8);
116extern int cio_cancel (struct subchannel *);
117extern int cio_set_options (struct subchannel *, int);
Sebastian Ottcdb912a2008-12-25 13:39:12 +0100118extern int cio_update_schib(struct subchannel *sch);
Sebastian Ott13952ec2008-12-25 13:39:13 +0100119extern int cio_commit_config(struct subchannel *sch);
Cornelia Hucka8237fc2006-01-06 00:19:21 -0800120
Peter Oberparleiter83262d62008-07-14 09:58:51 +0200121int cio_tm_start_key(struct subchannel *sch, struct tcw *tcw, u8 lpm, u8 key);
122int cio_tm_intrg(struct subchannel *sch);
123
Cornelia Huckd7b5a4c92006-12-08 15:54:28 +0100124int cio_create_sch_lock(struct subchannel *);
Cornelia Huckda7c5af2008-07-14 09:58:59 +0200125void do_adapter_IO(u8 isc);
Heiko Carstensa8061702008-04-17 07:46:26 +0200126void do_IRQ(struct pt_regs *);
Cornelia Huckd7b5a4c92006-12-08 15:54:28 +0100127
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128/* Use with care. */
129#ifdef CONFIG_CCW_CONSOLE
130extern struct subchannel *cio_probe_console(void);
131extern void cio_release_console(void);
Cornelia Hucka8237fc2006-01-06 00:19:21 -0800132extern int cio_is_console(struct subchannel_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133extern struct subchannel *cio_get_console_subchannel(void);
Cornelia Huck2ec22982006-12-08 15:54:26 +0100134extern spinlock_t * cio_get_console_lock(void);
Cornelia Huckcd6b4f22008-01-26 14:10:43 +0100135extern void *cio_get_console_priv(void);
Sebastian Ott188561a2013-04-13 12:53:21 +0200136extern void cio_tsch(struct subchannel *sch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137#else
Cornelia Hucka8237fc2006-01-06 00:19:21 -0800138#define cio_is_console(schid) 0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139#define cio_get_console_subchannel() NULL
Cornelia Huckcd6b4f22008-01-26 14:10:43 +0100140#define cio_get_console_lock() NULL
141#define cio_get_console_priv() NULL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142#endif
143
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144#endif