Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef S390_CIO_H |
| 2 | #define S390_CIO_H |
| 3 | |
Cornelia Huck | 6ab4879 | 2006-07-12 16:39:50 +0200 | [diff] [blame] | 4 | #include <linux/mutex.h> |
Peter Oberparleiter | e5854a5 | 2007-04-27 16:01:31 +0200 | [diff] [blame] | 5 | #include <linux/device.h> |
Cornelia Huck | 7e9db9e | 2008-07-14 09:58:44 +0200 | [diff] [blame] | 6 | #include <linux/mod_devicetable.h> |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 7 | #include <asm/chpid.h> |
Peter Oberparleiter | 83262d6 | 2008-07-14 09:58:51 +0200 | [diff] [blame] | 8 | #include <asm/cio.h> |
| 9 | #include <asm/fcx.h> |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 10 | #include <asm/schid.h> |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 11 | #include "chsc.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | |
| 13 | /* |
| 14 | * path management control word |
| 15 | */ |
| 16 | struct pmcw { |
Cornelia Huck | cd6b4f2 | 2008-01-26 14:10:43 +0100 | [diff] [blame] | 17 | u32 intparm; /* interruption parameter */ |
| 18 | u32 qf : 1; /* qdio facility */ |
Cornelia Huck | b3a686f | 2008-07-14 09:58:48 +0200 | [diff] [blame] | 19 | u32 w : 1; |
Cornelia Huck | cd6b4f2 | 2008-01-26 14:10:43 +0100 | [diff] [blame] | 20 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | /* ... per MSCH, however, if facility */ |
| 44 | /* ... is not installed, this results */ |
| 45 | /* ... in an operand exception. */ |
| 46 | } __attribute__ ((packed)); |
| 47 | |
Peter Oberparleiter | 2ab59de | 2015-12-18 12:59:32 +0100 | [diff] [blame] | 48 | /* I/O-Interruption Code as stored by TEST PENDING INTERRUPTION (TPI). */ |
| 49 | struct tpi_info { |
| 50 | struct subchannel_id schid; |
| 51 | u32 intparm; |
| 52 | u32 adapter_IO:1; |
| 53 | u32 :1; |
| 54 | u32 isc:3; |
| 55 | u32 :27; |
| 56 | u32 type:3; |
| 57 | u32 :12; |
| 58 | } __packed __aligned(4); |
| 59 | |
Sebastian Ott | 13952ec | 2008-12-25 13:39:13 +0100 | [diff] [blame] | 60 | /* Target SCHIB configuration. */ |
| 61 | struct schib_config { |
| 62 | u64 mba; |
| 63 | u32 intparm; |
| 64 | u16 mbi; |
| 65 | u32 isc:3; |
| 66 | u32 ena:1; |
| 67 | u32 mme:2; |
| 68 | u32 mp:1; |
| 69 | u32 csense:1; |
| 70 | u32 mbfc:1; |
| 71 | } __attribute__ ((packed)); |
| 72 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | /* |
| 74 | * subchannel information block |
| 75 | */ |
| 76 | struct schib { |
| 77 | struct pmcw pmcw; /* path management control word */ |
Peter Oberparleiter | 23d805b | 2008-07-14 09:58:50 +0200 | [diff] [blame] | 78 | union scsw scsw; /* subchannel status word */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | __u64 mba; /* measurement block address */ |
| 80 | __u8 mda[4]; /* model dependent area */ |
| 81 | } __attribute__ ((packed,aligned(4))); |
| 82 | |
Sebastian Ott | 817e500 | 2011-12-01 13:32:19 +0100 | [diff] [blame] | 83 | /* |
| 84 | * When rescheduled, todo's with higher values will overwrite those |
| 85 | * with lower values. |
| 86 | */ |
Peter Oberparleiter | 390935a | 2009-12-07 12:51:18 +0100 | [diff] [blame] | 87 | enum sch_todo { |
| 88 | SCH_TODO_NOTHING, |
Sebastian Ott | 817e500 | 2011-12-01 13:32:19 +0100 | [diff] [blame] | 89 | SCH_TODO_EVAL, |
Peter Oberparleiter | 390935a | 2009-12-07 12:51:18 +0100 | [diff] [blame] | 90 | SCH_TODO_UNREG, |
| 91 | }; |
| 92 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | /* subchannel data structure used by I/O subroutines */ |
| 94 | struct subchannel { |
Cornelia Huck | a8237fc | 2006-01-06 00:19:21 -0800 | [diff] [blame] | 95 | struct subchannel_id schid; |
Cornelia Huck | 2ec2298 | 2006-12-08 15:54:26 +0100 | [diff] [blame] | 96 | spinlock_t *lock; /* subchannel lock */ |
Cornelia Huck | 6ab4879 | 2006-07-12 16:39:50 +0200 | [diff] [blame] | 97 | struct mutex reg_mutex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | enum { |
| 99 | SUBCHANNEL_TYPE_IO = 0, |
| 100 | SUBCHANNEL_TYPE_CHSC = 1, |
Cornelia Huck | b279a4f | 2008-01-26 14:10:45 +0100 | [diff] [blame] | 101 | SUBCHANNEL_TYPE_MSG = 2, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | SUBCHANNEL_TYPE_ADM = 3, |
| 103 | } st; /* subchannel type */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | __u8 vpm; /* verified path mask */ |
| 105 | __u8 lpm; /* logical path mask */ |
| 106 | __u8 opm; /* operational path mask */ |
| 107 | struct schib schib; /* subchannel information block */ |
Cornelia Huck | edf2209 | 2008-04-30 13:38:39 +0200 | [diff] [blame] | 108 | int isc; /* desired interruption subclass */ |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 109 | struct chsc_ssd_info ssd_info; /* subchannel description */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | struct device dev; /* entry in device tree */ |
| 111 | struct css_driver *driver; |
Peter Oberparleiter | 390935a | 2009-12-07 12:51:18 +0100 | [diff] [blame] | 112 | enum sch_todo todo; |
| 113 | struct work_struct todo_work; |
Sebastian Ott | 13952ec | 2008-12-25 13:39:13 +0100 | [diff] [blame] | 114 | struct schib_config config; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | } __attribute__ ((aligned(8))); |
| 116 | |
Martin Schwidefsky | 63aef00 | 2014-05-27 14:40:39 +0200 | [diff] [blame] | 117 | DECLARE_PER_CPU(struct irb, cio_irb); |
| 118 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | #define to_subchannel(n) container_of(n, struct subchannel, dev) |
| 120 | |
Cornelia Huck | a8237fc | 2006-01-06 00:19:21 -0800 | [diff] [blame] | 121 | extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id); |
Cornelia Huck | edf2209 | 2008-04-30 13:38:39 +0200 | [diff] [blame] | 122 | extern int cio_enable_subchannel(struct subchannel *, u32); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | extern int cio_disable_subchannel (struct subchannel *); |
| 124 | extern int cio_cancel (struct subchannel *); |
| 125 | extern int cio_clear (struct subchannel *); |
| 126 | extern int cio_resume (struct subchannel *); |
| 127 | extern int cio_halt (struct subchannel *); |
| 128 | extern int cio_start (struct subchannel *, struct ccw1 *, __u8); |
| 129 | extern int cio_start_key (struct subchannel *, struct ccw1 *, __u8, __u8); |
| 130 | extern int cio_cancel (struct subchannel *); |
| 131 | extern int cio_set_options (struct subchannel *, int); |
Sebastian Ott | cdb912a | 2008-12-25 13:39:12 +0100 | [diff] [blame] | 132 | extern int cio_update_schib(struct subchannel *sch); |
Sebastian Ott | 13952ec | 2008-12-25 13:39:13 +0100 | [diff] [blame] | 133 | extern int cio_commit_config(struct subchannel *sch); |
Cornelia Huck | a8237fc | 2006-01-06 00:19:21 -0800 | [diff] [blame] | 134 | |
Peter Oberparleiter | 83262d6 | 2008-07-14 09:58:51 +0200 | [diff] [blame] | 135 | int cio_tm_start_key(struct subchannel *sch, struct tcw *tcw, u8 lpm, u8 key); |
| 136 | int cio_tm_intrg(struct subchannel *sch); |
| 137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | /* Use with care. */ |
| 139 | #ifdef CONFIG_CCW_CONSOLE |
| 140 | extern struct subchannel *cio_probe_console(void); |
Cornelia Huck | a8237fc | 2006-01-06 00:19:21 -0800 | [diff] [blame] | 141 | extern int cio_is_console(struct subchannel_id); |
Sebastian Ott | 14556b3 | 2013-04-13 13:03:54 +0200 | [diff] [blame] | 142 | extern void cio_register_early_subchannels(void); |
Sebastian Ott | 188561a | 2013-04-13 12:53:21 +0200 | [diff] [blame] | 143 | extern void cio_tsch(struct subchannel *sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | #else |
Cornelia Huck | a8237fc | 2006-01-06 00:19:21 -0800 | [diff] [blame] | 145 | #define cio_is_console(schid) 0 |
Sebastian Ott | 14556b3 | 2013-04-13 13:03:54 +0200 | [diff] [blame] | 146 | static inline void cio_register_early_subchannels(void) {} |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | #endif |
| 148 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | #endif |