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 
__stsch(struct subchannel_id schid,struct schib * addr)16 static 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 
stsch(struct subchannel_id schid,struct schib * addr)33 int 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 }
42 EXPORT_SYMBOL(stsch);
43 
__msch(struct subchannel_id schid,struct schib * addr)44 static 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 
msch(struct subchannel_id schid,struct schib * addr)61 int 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 
__tsch(struct subchannel_id schid,struct irb * addr)71 static 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 
tsch(struct subchannel_id schid,struct irb * addr)86 int 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 
__ssch(struct subchannel_id schid,union orb * addr)96 static 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 
ssch(struct subchannel_id schid,union orb * addr)113 int 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 }
122 EXPORT_SYMBOL(ssch);
123 
__csch(struct subchannel_id schid)124 static 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 
csch(struct subchannel_id schid)139 int 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 }
148 EXPORT_SYMBOL(csch);
149 
tpi(struct tpi_info * addr)150 int 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 
chsc(void * chsc_area)166 int 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 }
184 EXPORT_SYMBOL(chsc);
185 
__rsch(struct subchannel_id schid)186 static 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 
rsch(struct subchannel_id schid)202 int 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 
__hsch(struct subchannel_id schid)212 static 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 
hsch(struct subchannel_id schid)227 int 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 
__xsch(struct subchannel_id schid)237 static 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 
xsch(struct subchannel_id schid)252 int 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 
stcrw(struct crw * crw)262 int 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 }
277