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gerrit-public.fairphone.software / kernel / msm-4.9 / 944256e00a5466ae6b7a11fdb3a47d092f2f62c1 / . / drivers / s390 / cio / io_sch.h
blob: 8c613160bfceb0e3b2ec905b95083eef55c14a76 [file] [log] [blame]
Cornelia Huckcd6b4f22008-01-26 14:10:43 +0100[diff] [blame]1#ifndef S390_IO_SCH_H
2#define S390_IO_SCH_H
3
4#include "schid.h"
5
6/*
7 * operation request block
8 */
9struct orb {
10 u32 intparm; /* interruption parameter */
11 u32 key : 4; /* flags, like key, suspend control, etc. */
12 u32 spnd : 1; /* suspend control */
13 u32 res1 : 1; /* reserved */
14 u32 mod : 1; /* modification control */
15 u32 sync : 1; /* synchronize control */
16 u32 fmt : 1; /* format control */
17 u32 pfch : 1; /* prefetch control */
18 u32 isic : 1; /* initial-status-interruption control */
19 u32 alcc : 1; /* address-limit-checking control */
20 u32 ssic : 1; /* suppress-suspended-interr. control */
21 u32 res2 : 1; /* reserved */
22 u32 c64 : 1; /* IDAW/QDIO 64 bit control */
23 u32 i2k : 1; /* IDAW 2/4kB block size control */
24 u32 lpm : 8; /* logical path mask */
25 u32 ils : 1; /* incorrect length */
26 u32 zero : 6; /* reserved zeros */
27 u32 orbx : 1; /* ORB extension control */
28 u32 cpa; /* channel program address */
29} __attribute__ ((packed, aligned(4)));
30
31struct io_subchannel_private {
32 struct orb orb; /* operation request block */
33 struct ccw1 sense_ccw; /* static ccw for sense command */
34} __attribute__ ((aligned(8)));
35
36#define to_io_private(n) ((struct io_subchannel_private *)n->private)
Cornelia Huckdb6a6422008-01-26 14:10:46 +0100[diff] [blame]37#define sch_get_cdev(n) (dev_get_drvdata(&n->dev))
38#define sch_set_cdev(n, c) (dev_set_drvdata(&n->dev, c))
Cornelia Huckcd6b4f22008-01-26 14:10:43 +0100[diff] [blame]39
40#define MAX_CIWS 8
41
42/*
43 * sense-id response buffer layout
44 */
45struct senseid {
46 /* common part */
47 u8 reserved; /* always 0x'FF' */
48 u16 cu_type; /* control unit type */
49 u8 cu_model; /* control unit model */
50 u16 dev_type; /* device type */
51 u8 dev_model; /* device model */
52 u8 unused; /* padding byte */
53 /* extended part */
54 struct ciw ciw[MAX_CIWS]; /* variable # of CIWs */
55} __attribute__ ((packed, aligned(4)));
56
57struct ccw_device_private {
58 struct ccw_device *cdev;
59 struct subchannel *sch;
60 int state; /* device state */
61 atomic_t onoff;
62 unsigned long registered;
63 struct ccw_dev_id dev_id; /* device id */
64 struct subchannel_id schid; /* subchannel number */
65 u8 imask; /* lpm mask for SNID/SID/SPGID */
66 int iretry; /* retry counter SNID/SID/SPGID */
67 struct {
68 unsigned int fast:1; /* post with "channel end" */
69 unsigned int repall:1; /* report every interrupt status */
70 unsigned int pgroup:1; /* do path grouping */
71 unsigned int force:1; /* allow forced online */
72 } __attribute__ ((packed)) options;
73 struct {
74 unsigned int pgid_single:1; /* use single path for Set PGID */
75 unsigned int esid:1; /* Ext. SenseID supported by HW */
76 unsigned int dosense:1; /* delayed SENSE required */
77 unsigned int doverify:1; /* delayed path verification */
78 unsigned int donotify:1; /* call notify function */
79 unsigned int recog_done:1; /* dev. recog. complete */
80 unsigned int fake_irb:1; /* deliver faked irb */
81 unsigned int intretry:1; /* retry internal operation */
82 } __attribute__((packed)) flags;
83 unsigned long intparm; /* user interruption parameter */
84 struct qdio_irq *qdio_data;
85 struct irb irb; /* device status */
86 struct senseid senseid; /* SenseID info */
87 struct pgid pgid[8]; /* path group IDs per chpid*/
88 struct ccw1 iccws[2]; /* ccws for SNID/SID/SPGID commands */
89 struct work_struct kick_work;
90 wait_queue_head_t wait_q;
91 struct timer_list timer;
92 void *cmb; /* measurement information */
93 struct list_head cmb_list; /* list of measured devices */
94 u64 cmb_start_time; /* clock value of cmb reset */
95 void *cmb_wait; /* deferred cmb enable/disable */
96};
97
98static inline int ssch(struct subchannel_id schid, volatile struct orb *addr)
99{
100 register struct subchannel_id reg1 asm("1") = schid;
101 int ccode;
102
103 asm volatile(
104 " ssch 0(%2)\n"
105 " ipm %0\n"
106 " srl %0,28"
107 : "=d" (ccode) : "d" (reg1), "a" (addr), "m" (*addr) : "cc");
108 return ccode;
109}
110
111static inline int rsch(struct subchannel_id schid)
112{
113 register struct subchannel_id reg1 asm("1") = schid;
114 int ccode;
115
116 asm volatile(
117 " rsch\n"
118 " ipm %0\n"
119 " srl %0,28"
120 : "=d" (ccode) : "d" (reg1) : "cc");
121 return ccode;
122}
123
124static inline int csch(struct subchannel_id schid)
125{
126 register struct subchannel_id reg1 asm("1") = schid;
127 int ccode;
128
129 asm volatile(
130 " csch\n"
131 " ipm %0\n"
132 " srl %0,28"
133 : "=d" (ccode) : "d" (reg1) : "cc");
134 return ccode;
135}
136
137static inline int hsch(struct subchannel_id schid)
138{
139 register struct subchannel_id reg1 asm("1") = schid;
140 int ccode;
141
142 asm volatile(
143 " hsch\n"
144 " ipm %0\n"
145 " srl %0,28"
146 : "=d" (ccode) : "d" (reg1) : "cc");
147 return ccode;
148}
149
150static inline int xsch(struct subchannel_id schid)
151{
152 register struct subchannel_id reg1 asm("1") = schid;
153 int ccode;
154
155 asm volatile(
156 " .insn rre,0xb2760000,%1,0\n"
157 " ipm %0\n"
158 " srl %0,28"
159 : "=d" (ccode) : "d" (reg1) : "cc");
160 return ccode;
161}
162
163#endif