drivers/s390/cio/ioasm.c

   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
  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
  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
  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
  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
  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
  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
  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
 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
 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
 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
 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
 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
 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
 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
 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
 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 EXPORT_SYMBOL(hsch);
 237
 238 static inline int __xsch(struct subchannel_id schid)
 239 {
 240         register struct subchannel_id reg1 asm("1") = schid;
 241         int ccode;
 242
 243         asm volatile(
 244                 "       xsch\n"
 245                 "       ipm     %0\n"
 246                 "       srl     %0,28"
 247                 : "=d" (ccode)
 248                 : "d" (reg1)
 249                 : "cc");
 250         return ccode;
 251 }
 252
 253 int xsch(struct subchannel_id schid)
 254 {
 255         int ccode;
 256
 257         ccode = __xsch(schid);
 258         trace_s390_cio_xsch(schid, ccode);
 259
 260         return ccode;
 261 }
 262
 263 int stcrw(struct crw *crw)
 264 {
 265         int ccode;
 266
 267         asm volatile(
 268                 "       stcrw   0(%2)\n"
 269                 "       ipm     %0\n"
 270                 "       srl     %0,28\n"
 271                 : "=d" (ccode), "=m" (*crw)
 272                 : "a" (crw)
 273                 : "cc");
 274         trace_s390_cio_stcrw(crw, ccode);
 275
 276         return ccode;
 277 }