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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 | // SPDX-License-Identifier: GPL-2.0 /* * Channel subsystem I/O instructions. */ #include <linux/export.h> #include <asm/asm-extable.h> #include <asm/chpid.h> #include <asm/schid.h> #include <asm/crw.h> #include "ioasm.h" #include "orb.h" #include "cio.h" #include "cio_inject.h" static inline int __stsch(struct subchannel_id schid, struct schib *addr) { unsigned long r1 = *(unsigned int *)&schid; int ccode = -EIO; asm volatile( " lgr 1,%[r1]\n" " stsch %[addr]\n" "0: ipm %[cc]\n" " srl %[cc],28\n" "1:\n" EX_TABLE(0b, 1b) : [cc] "+&d" (ccode), [addr] "=Q" (*addr) : [r1] "d" (r1) : "cc", "1"); return ccode; } int stsch(struct subchannel_id schid, struct schib *addr) { int ccode; ccode = __stsch(schid, addr); trace_s390_cio_stsch(schid, addr, ccode); return ccode; } EXPORT_SYMBOL(stsch); static inline int __msch(struct subchannel_id schid, struct schib *addr) { unsigned long r1 = *(unsigned int *)&schid; int ccode = -EIO; asm volatile( " lgr 1,%[r1]\n" " msch %[addr]\n" "0: ipm %[cc]\n" " srl %[cc],28\n" "1:\n" EX_TABLE(0b, 1b) : [cc] "+&d" (ccode) : [r1] "d" (r1), [addr] "Q" (*addr) : "cc", "1"); return ccode; } int msch(struct subchannel_id schid, struct schib *addr) { int ccode; ccode = __msch(schid, addr); trace_s390_cio_msch(schid, addr, ccode); return ccode; } static inline int __tsch(struct subchannel_id schid, struct irb *addr) { unsigned long r1 = *(unsigned int *)&schid; int ccode; asm volatile( " lgr 1,%[r1]\n" " tsch %[addr]\n" " ipm %[cc]\n" " srl %[cc],28" : [cc] "=&d" (ccode), [addr] "=Q" (*addr) : [r1] "d" (r1) : "cc", "1"); return ccode; } int tsch(struct subchannel_id schid, struct irb *addr) { int ccode; ccode = __tsch(schid, addr); trace_s390_cio_tsch(schid, addr, ccode); return ccode; } static inline int __ssch(struct subchannel_id schid, union orb *addr) { unsigned long r1 = *(unsigned int *)&schid; int ccode = -EIO; asm volatile( " lgr 1,%[r1]\n" " ssch %[addr]\n" "0: ipm %[cc]\n" " srl %[cc],28\n" "1:\n" EX_TABLE(0b, 1b) : [cc] "+&d" (ccode) : [r1] "d" (r1), [addr] "Q" (*addr) : "cc", "memory", "1"); return ccode; } int ssch(struct subchannel_id schid, union orb *addr) { int ccode; ccode = __ssch(schid, addr); trace_s390_cio_ssch(schid, addr, ccode); return ccode; } EXPORT_SYMBOL(ssch); static inline int __csch(struct subchannel_id schid) { unsigned long r1 = *(unsigned int *)&schid; int ccode; asm volatile( " lgr 1,%[r1]\n" " csch\n" " ipm %[cc]\n" " srl %[cc],28\n" : [cc] "=&d" (ccode) : [r1] "d" (r1) : "cc", "1"); return ccode; } int csch(struct subchannel_id schid) { int ccode; ccode = __csch(schid); trace_s390_cio_csch(schid, ccode); return ccode; } EXPORT_SYMBOL(csch); int tpi(struct tpi_info *addr) { int ccode; asm volatile( " tpi %[addr]\n" " ipm %[cc]\n" " srl %[cc],28" : [cc] "=&d" (ccode), [addr] "=Q" (*addr) : : "cc"); trace_s390_cio_tpi(addr, ccode); return ccode; } int chsc(void *chsc_area) { typedef struct { char _[4096]; } addr_type; int cc = -EIO; asm volatile( " .insn rre,0xb25f0000,%[chsc_area],0\n" "0: ipm %[cc]\n" " srl %[cc],28\n" "1:\n" EX_TABLE(0b, 1b) : [cc] "+&d" (cc), "+m" (*(addr_type *)chsc_area) : [chsc_area] "d" (chsc_area) : "cc"); trace_s390_cio_chsc(chsc_area, cc); return cc; } EXPORT_SYMBOL(chsc); static inline int __rsch(struct subchannel_id schid) { unsigned long r1 = *(unsigned int *)&schid; int ccode; asm volatile( " lgr 1,%[r1]\n" " rsch\n" " ipm %[cc]\n" " srl %[cc],28\n" : [cc] "=&d" (ccode) : [r1] "d" (r1) : "cc", "memory", "1"); return ccode; } int rsch(struct subchannel_id schid) { int ccode; ccode = __rsch(schid); trace_s390_cio_rsch(schid, ccode); return ccode; } static inline int __hsch(struct subchannel_id schid) { unsigned long r1 = *(unsigned int *)&schid; int ccode; asm volatile( " lgr 1,%[r1]\n" " hsch\n" " ipm %[cc]\n" " srl %[cc],28\n" : [cc] "=&d" (ccode) : [r1] "d" (r1) : "cc", "1"); return ccode; } int hsch(struct subchannel_id schid) { int ccode; ccode = __hsch(schid); trace_s390_cio_hsch(schid, ccode); return ccode; } EXPORT_SYMBOL(hsch); static inline int __xsch(struct subchannel_id schid) { unsigned long r1 = *(unsigned int *)&schid; int ccode; asm volatile( " lgr 1,%[r1]\n" " xsch\n" " ipm %[cc]\n" " srl %[cc],28\n" : [cc] "=&d" (ccode) : [r1] "d" (r1) : "cc", "1"); return ccode; } int xsch(struct subchannel_id schid) { int ccode; ccode = __xsch(schid); trace_s390_cio_xsch(schid, ccode); return ccode; } static inline int __stcrw(struct crw *crw) { int ccode; asm volatile( " stcrw %[crw]\n" " ipm %[cc]\n" " srl %[cc],28\n" : [cc] "=&d" (ccode), [crw] "=Q" (*crw) : : "cc"); return ccode; } static inline int _stcrw(struct crw *crw) { #ifdef CONFIG_CIO_INJECT if (static_branch_unlikely(&cio_inject_enabled)) { if (stcrw_get_injected(crw) == 0) return 0; } #endif return __stcrw(crw); } int stcrw(struct crw *crw) { int ccode; ccode = _stcrw(crw); trace_s390_cio_stcrw(crw, ccode); return ccode; } |