tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Channel subsystem I/O instructions.
4 */
5
6#include <linux/export.h>
7
8#include <asm/chpid.h>
9#include <asm/schid.h>
10#include <asm/crw.h>
11
12#include "ioasm.h"
13#include "orb.h"
14#include "cio.h"
15
16static inline int __stsch(struct subchannel_id schid, struct schib *addr)
17{
18 register struct subchannel_id reg1 asm ("1") = schid;
19 int ccode = -EIO;
20
21 asm volatile(
22 " stsch 0(%3)\n"
23 "0: ipm %0\n"
24 " srl %0,28\n"
25 "1:\n"
26 EX_TABLE(0b, 1b)
27 : "+d" (ccode), "=m" (*addr)
28 : "d" (reg1), "a" (addr)
29 : "cc");
30 return ccode;
31}
32
33int stsch(struct subchannel_id schid, struct schib *addr)
34{
35 int ccode;
36
37 ccode = __stsch(schid, addr);
38 trace_s390_cio_stsch(schid, addr, ccode);
39
40 return ccode;
41}
42EXPORT_SYMBOL(stsch);
43
44static inline int __msch(struct subchannel_id schid, struct schib *addr)
45{
46 register struct subchannel_id reg1 asm ("1") = schid;
47 int ccode = -EIO;
48
49 asm volatile(
50 " msch 0(%2)\n"
51 "0: ipm %0\n"
52 " srl %0,28\n"
53 "1:\n"
54 EX_TABLE(0b, 1b)
55 : "+d" (ccode)
56 : "d" (reg1), "a" (addr), "m" (*addr)
57 : "cc");
58 return ccode;
59}
60
61int msch(struct subchannel_id schid, struct schib *addr)
62{
63 int ccode;
64
65 ccode = __msch(schid, addr);
66 trace_s390_cio_msch(schid, addr, ccode);
67
68 return ccode;
69}
70
71static inline int __tsch(struct subchannel_id schid, struct irb *addr)
72{
73 register struct subchannel_id reg1 asm ("1") = schid;
74 int ccode;
75
76 asm volatile(
77 " tsch 0(%3)\n"
78 " ipm %0\n"
79 " srl %0,28"
80 : "=d" (ccode), "=m" (*addr)
81 : "d" (reg1), "a" (addr)
82 : "cc");
83 return ccode;
84}
85
86int tsch(struct subchannel_id schid, struct irb *addr)
87{
88 int ccode;
89
90 ccode = __tsch(schid, addr);
91 trace_s390_cio_tsch(schid, addr, ccode);
92
93 return ccode;
94}
95
96static inline int __ssch(struct subchannel_id schid, union orb *addr)
97{
98 register struct subchannel_id reg1 asm("1") = schid;
99 int ccode = -EIO;
100
101 asm volatile(
102 " ssch 0(%2)\n"
103 "0: ipm %0\n"
104 " srl %0,28\n"
105 "1:\n"
106 EX_TABLE(0b, 1b)
107 : "+d" (ccode)
108 : "d" (reg1), "a" (addr), "m" (*addr)
109 : "cc", "memory");
110 return ccode;
111}
112
113int ssch(struct subchannel_id schid, union orb *addr)
114{
115 int ccode;
116
117 ccode = __ssch(schid, addr);
118 trace_s390_cio_ssch(schid, addr, ccode);
119
120 return ccode;
121}
122EXPORT_SYMBOL(ssch);
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)
134 : "d" (reg1)
135 : "cc");
136 return ccode;
137}
138
139int csch(struct subchannel_id schid)
140{
141 int ccode;
142
143 ccode = __csch(schid);
144 trace_s390_cio_csch(schid, ccode);
145
146 return ccode;
147}
148EXPORT_SYMBOL(csch);
149
150int tpi(struct tpi_info *addr)
151{
152 int ccode;
153
154 asm volatile(
155 " tpi 0(%2)\n"
156 " ipm %0\n"
157 " srl %0,28"
158 : "=d" (ccode), "=m" (*addr)
159 : "a" (addr)
160 : "cc");
161 trace_s390_cio_tpi(addr, ccode);
162
163 return ccode;
164}
165
166int chsc(void *chsc_area)
167{
168 typedef struct { char _[4096]; } addr_type;
169 int cc = -EIO;
170
171 asm volatile(
172 " .insn rre,0xb25f0000,%2,0\n"
173 "0: ipm %0\n"
174 " srl %0,28\n"
175 "1:\n"
176 EX_TABLE(0b, 1b)
177 : "+d" (cc), "=m" (*(addr_type *) chsc_area)
178 : "d" (chsc_area), "m" (*(addr_type *) chsc_area)
179 : "cc");
180 trace_s390_cio_chsc(chsc_area, cc);
181
182 return cc;
183}
184EXPORT_SYMBOL(chsc);
185
186static inline int __rsch(struct subchannel_id schid)
187{
188 register struct subchannel_id reg1 asm("1") = schid;
189 int ccode;
190
191 asm volatile(
192 " rsch\n"
193 " ipm %0\n"
194 " srl %0,28"
195 : "=d" (ccode)
196 : "d" (reg1)
197 : "cc", "memory");
198
199 return ccode;
200}
201
202int rsch(struct subchannel_id schid)
203{
204 int ccode;
205
206 ccode = __rsch(schid);
207 trace_s390_cio_rsch(schid, ccode);
208
209 return ccode;
210}
211
212static inline int __hsch(struct subchannel_id schid)
213{
214 register struct subchannel_id reg1 asm("1") = schid;
215 int ccode;
216
217 asm volatile(
218 " hsch\n"
219 " ipm %0\n"
220 " srl %0,28"
221 : "=d" (ccode)
222 : "d" (reg1)
223 : "cc");
224 return ccode;
225}
226
227int hsch(struct subchannel_id schid)
228{
229 int ccode;
230
231 ccode = __hsch(schid);
232 trace_s390_cio_hsch(schid, ccode);
233
234 return ccode;
235}
236
237static inline int __xsch(struct subchannel_id schid)
238{
239 register struct subchannel_id reg1 asm("1") = schid;
240 int ccode;
241
242 asm volatile(
243 " xsch\n"
244 " ipm %0\n"
245 " srl %0,28"
246 : "=d" (ccode)
247 : "d" (reg1)
248 : "cc");
249 return ccode;
250}
251
252int xsch(struct subchannel_id schid)
253{
254 int ccode;
255
256 ccode = __xsch(schid);
257 trace_s390_cio_xsch(schid, ccode);
258
259 return ccode;
260}
261
262int stcrw(struct crw *crw)
263{
264 int ccode;
265
266 asm volatile(
267 " stcrw 0(%2)\n"
268 " ipm %0\n"
269 " srl %0,28\n"
270 : "=d" (ccode), "=m" (*crw)
271 : "a" (crw)
272 : "cc");
273 trace_s390_cio_stcrw(crw, ccode);
274
275 return ccode;
276}