1 #ifndef S390_IO_SCH_H
2 #define S390_IO_SCH_H
3
4 #include <asm/schid.h>
5
6 /*
7 * command-mode operation request block
8 */
9 struct cmd_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
31 /*
32 * transport-mode operation request block
33 */
34 struct tm_orb {
35 u32 intparm;
36 u32 key:4;
37 u32 :9;
38 u32 b:1;
39 u32 :2;
40 u32 lpm:8;
41 u32 :7;
42 u32 x:1;
43 u32 tcw;
44 u32 prio:8;
45 u32 :8;
46 u32 rsvpgm:8;
47 u32 :8;
48 u32 :32;
49 u32 :32;
50 u32 :32;
51 u32 :32;
52 } __attribute__ ((packed, aligned(4)));
53
54 union orb {
55 struct cmd_orb cmd;
56 struct tm_orb tm;
57 } __attribute__ ((packed, aligned(4)));
58
59 struct io_subchannel_private {
60 union orb orb; /* operation request block */
61 struct ccw1 sense_ccw; /* static ccw for sense command */
62 } __attribute__ ((aligned(8)));
63
64 #define to_io_private(n) ((struct io_subchannel_private *)n->private)
65 #define sch_get_cdev(n) (dev_get_drvdata(&n->dev))
66 #define sch_set_cdev(n, c) (dev_set_drvdata(&n->dev, c))
67
68 #define MAX_CIWS 8
69
70 /*
71 * sense-id response buffer layout
72 */
73 struct senseid {
74 /* common part */
75 u8 reserved; /* always 0x'FF' */
76 u16 cu_type; /* control unit type */
77 u8 cu_model; /* control unit model */
78 u16 dev_type; /* device type */
79 u8 dev_model; /* device model */
80 u8 unused; /* padding byte */
81 /* extended part */
82 struct ciw ciw[MAX_CIWS]; /* variable # of CIWs */
83 } __attribute__ ((packed, aligned(4)));
84
85 struct ccw_device_private {
86 struct ccw_device *cdev;
87 struct subchannel *sch;
88 int state; /* device state */
89 atomic_t onoff;
90 unsigned long registered;
91 struct ccw_dev_id dev_id; /* device id */
92 struct subchannel_id schid; /* subchannel number */
93 u8 imask; /* lpm mask for SNID/SID/SPGID */
94 int iretry; /* retry counter SNID/SID/SPGID */
95 struct {
96 unsigned int fast:1; /* post with "channel end" */
97 unsigned int repall:1; /* report every interrupt status */
98 unsigned int pgroup:1; /* do path grouping */
99 unsigned int force:1; /* allow forced online */
100 } __attribute__ ((packed)) options;
101 struct {
102 unsigned int pgid_single:1; /* use single path for Set PGID */
103 unsigned int esid:1; /* Ext. SenseID supported by HW */
104 unsigned int dosense:1; /* delayed SENSE required */
105 unsigned int doverify:1; /* delayed path verification */
106 unsigned int donotify:1; /* call notify function */
107 unsigned int recog_done:1; /* dev. recog. complete */
108 unsigned int fake_irb:1; /* deliver faked irb */
109 unsigned int intretry:1; /* retry internal operation */
110 } __attribute__((packed)) flags;
111 unsigned long intparm; /* user interruption parameter */
112 struct qdio_irq *qdio_data;
113 struct irb irb; /* device status */
114 struct senseid senseid; /* SenseID info */
115 struct pgid pgid[8]; /* path group IDs per chpid*/
116 struct ccw1 iccws[2]; /* ccws for SNID/SID/SPGID commands */
117 struct work_struct kick_work;
118 wait_queue_head_t wait_q;
119 struct timer_list timer;
120 void *cmb; /* measurement information */
121 struct list_head cmb_list; /* list of measured devices */
122 u64 cmb_start_time; /* clock value of cmb reset */
123 void *cmb_wait; /* deferred cmb enable/disable */
124 };
125
ssch(struct subchannel_id schid,union orb * addr)126 static inline int ssch(struct subchannel_id schid, union orb *addr)
127 {
128 register struct subchannel_id reg1 asm("1") = schid;
129 int ccode = -EIO;
130
131 asm volatile(
132 " ssch 0(%2)\n"
133 "0: ipm %0\n"
134 " srl %0,28\n"
135 "1:\n"
136 EX_TABLE(0b, 1b)
137 : "+d" (ccode)
138 : "d" (reg1), "a" (addr), "m" (*addr)
139 : "cc", "memory");
140 return ccode;
141 }
142
rsch(struct subchannel_id schid)143 static inline int rsch(struct subchannel_id schid)
144 {
145 register struct subchannel_id reg1 asm("1") = schid;
146 int ccode;
147
148 asm volatile(
149 " rsch\n"
150 " ipm %0\n"
151 " srl %0,28"
152 : "=d" (ccode)
153 : "d" (reg1)
154 : "cc", "memory");
155 return ccode;
156 }
157
csch(struct subchannel_id schid)158 static inline int csch(struct subchannel_id schid)
159 {
160 register struct subchannel_id reg1 asm("1") = schid;
161 int ccode;
162
163 asm volatile(
164 " csch\n"
165 " ipm %0\n"
166 " srl %0,28"
167 : "=d" (ccode)
168 : "d" (reg1)
169 : "cc");
170 return ccode;
171 }
172
hsch(struct subchannel_id schid)173 static inline int hsch(struct subchannel_id schid)
174 {
175 register struct subchannel_id reg1 asm("1") = schid;
176 int ccode;
177
178 asm volatile(
179 " hsch\n"
180 " ipm %0\n"
181 " srl %0,28"
182 : "=d" (ccode)
183 : "d" (reg1)
184 : "cc");
185 return ccode;
186 }
187
xsch(struct subchannel_id schid)188 static inline int xsch(struct subchannel_id schid)
189 {
190 register struct subchannel_id reg1 asm("1") = schid;
191 int ccode;
192
193 asm volatile(
194 " .insn rre,0xb2760000,%1,0\n"
195 " ipm %0\n"
196 " srl %0,28"
197 : "=d" (ccode)
198 : "d" (reg1)
199 : "cc");
200 return ccode;
201 }
202
203 #endif
204