1 /* 2 * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator 3 * 4 * PAPR Virtualized Interrupt System, aka ICS/ICP aka xics 5 * 6 * Copyright (c) 2010,2011 David Gibson, IBM Corporation. 7 * 8 * Permission is hereby granted, free of charge, to any person obtaining a copy 9 * of this software and associated documentation files (the "Software"), to deal 10 * in the Software without restriction, including without limitation the rights 11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 12 * copies of the Software, and to permit persons to whom the Software is 13 * furnished to do so, subject to the following conditions: 14 * 15 * The above copyright notice and this permission notice shall be included in 16 * all copies or substantial portions of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 24 * THE SOFTWARE. 25 * 26 */ 27 28 #include "qemu/osdep.h" 29 #include "cpu.h" 30 #include "hw/hw.h" 31 #include "trace.h" 32 #include "qemu/timer.h" 33 #include "hw/ppc/spapr.h" 34 #include "hw/ppc/xics.h" 35 #include "qapi/visitor.h" 36 #include "qapi/error.h" 37 38 /* 39 * Guest interfaces 40 */ 41 42 static target_ulong h_cppr(PowerPCCPU *cpu, sPAPRMachineState *spapr, 43 target_ulong opcode, target_ulong *args) 44 { 45 CPUState *cs = CPU(cpu); 46 target_ulong cppr = args[0]; 47 48 icp_set_cppr(spapr->xics, cs->cpu_index, cppr); 49 return H_SUCCESS; 50 } 51 52 static target_ulong h_ipi(PowerPCCPU *cpu, sPAPRMachineState *spapr, 53 target_ulong opcode, target_ulong *args) 54 { 55 target_ulong server = xics_get_cpu_index_by_dt_id(args[0]); 56 target_ulong mfrr = args[1]; 57 58 if (server >= spapr->xics->nr_servers) { 59 return H_PARAMETER; 60 } 61 62 icp_set_mfrr(spapr->xics, server, mfrr); 63 return H_SUCCESS; 64 } 65 66 static target_ulong h_xirr(PowerPCCPU *cpu, sPAPRMachineState *spapr, 67 target_ulong opcode, target_ulong *args) 68 { 69 CPUState *cs = CPU(cpu); 70 uint32_t xirr = icp_accept(spapr->xics->ss + cs->cpu_index); 71 72 args[0] = xirr; 73 return H_SUCCESS; 74 } 75 76 static target_ulong h_xirr_x(PowerPCCPU *cpu, sPAPRMachineState *spapr, 77 target_ulong opcode, target_ulong *args) 78 { 79 CPUState *cs = CPU(cpu); 80 ICPState *ss = &spapr->xics->ss[cs->cpu_index]; 81 uint32_t xirr = icp_accept(ss); 82 83 args[0] = xirr; 84 args[1] = cpu_get_host_ticks(); 85 return H_SUCCESS; 86 } 87 88 static target_ulong h_eoi(PowerPCCPU *cpu, sPAPRMachineState *spapr, 89 target_ulong opcode, target_ulong *args) 90 { 91 CPUState *cs = CPU(cpu); 92 target_ulong xirr = args[0]; 93 94 icp_eoi(spapr->xics, cs->cpu_index, xirr); 95 return H_SUCCESS; 96 } 97 98 static target_ulong h_ipoll(PowerPCCPU *cpu, sPAPRMachineState *spapr, 99 target_ulong opcode, target_ulong *args) 100 { 101 CPUState *cs = CPU(cpu); 102 uint32_t mfrr; 103 uint32_t xirr = icp_ipoll(spapr->xics->ss + cs->cpu_index, &mfrr); 104 105 args[0] = xirr; 106 args[1] = mfrr; 107 108 return H_SUCCESS; 109 } 110 111 static void rtas_set_xive(PowerPCCPU *cpu, sPAPRMachineState *spapr, 112 uint32_t token, 113 uint32_t nargs, target_ulong args, 114 uint32_t nret, target_ulong rets) 115 { 116 ICSState *ics = spapr->xics->ics; 117 uint32_t nr, server, priority; 118 119 if ((nargs != 3) || (nret != 1)) { 120 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 121 return; 122 } 123 124 nr = rtas_ld(args, 0); 125 server = xics_get_cpu_index_by_dt_id(rtas_ld(args, 1)); 126 priority = rtas_ld(args, 2); 127 128 if (!ics_valid_irq(ics, nr) || (server >= ics->xics->nr_servers) 129 || (priority > 0xff)) { 130 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 131 return; 132 } 133 134 ics_write_xive(ics, nr, server, priority, priority); 135 136 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 137 } 138 139 static void rtas_get_xive(PowerPCCPU *cpu, sPAPRMachineState *spapr, 140 uint32_t token, 141 uint32_t nargs, target_ulong args, 142 uint32_t nret, target_ulong rets) 143 { 144 ICSState *ics = spapr->xics->ics; 145 uint32_t nr; 146 147 if ((nargs != 1) || (nret != 3)) { 148 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 149 return; 150 } 151 152 nr = rtas_ld(args, 0); 153 154 if (!ics_valid_irq(ics, nr)) { 155 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 156 return; 157 } 158 159 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 160 rtas_st(rets, 1, ics->irqs[nr - ics->offset].server); 161 rtas_st(rets, 2, ics->irqs[nr - ics->offset].priority); 162 } 163 164 static void rtas_int_off(PowerPCCPU *cpu, sPAPRMachineState *spapr, 165 uint32_t token, 166 uint32_t nargs, target_ulong args, 167 uint32_t nret, target_ulong rets) 168 { 169 ICSState *ics = spapr->xics->ics; 170 uint32_t nr; 171 172 if ((nargs != 1) || (nret != 1)) { 173 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 174 return; 175 } 176 177 nr = rtas_ld(args, 0); 178 179 if (!ics_valid_irq(ics, nr)) { 180 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 181 return; 182 } 183 184 ics_write_xive(ics, nr, ics->irqs[nr - ics->offset].server, 0xff, 185 ics->irqs[nr - ics->offset].priority); 186 187 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 188 } 189 190 static void rtas_int_on(PowerPCCPU *cpu, sPAPRMachineState *spapr, 191 uint32_t token, 192 uint32_t nargs, target_ulong args, 193 uint32_t nret, target_ulong rets) 194 { 195 ICSState *ics = spapr->xics->ics; 196 uint32_t nr; 197 198 if ((nargs != 1) || (nret != 1)) { 199 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 200 return; 201 } 202 203 nr = rtas_ld(args, 0); 204 205 if (!ics_valid_irq(ics, nr)) { 206 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 207 return; 208 } 209 210 ics_write_xive(ics, nr, ics->irqs[nr - ics->offset].server, 211 ics->irqs[nr - ics->offset].saved_priority, 212 ics->irqs[nr - ics->offset].saved_priority); 213 214 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 215 } 216 217 static void xics_spapr_set_nr_irqs(XICSState *xics, uint32_t nr_irqs, 218 Error **errp) 219 { 220 xics->nr_irqs = xics->ics->nr_irqs = nr_irqs; 221 } 222 223 static void xics_spapr_set_nr_servers(XICSState *xics, uint32_t nr_servers, 224 Error **errp) 225 { 226 int i; 227 228 xics->nr_servers = nr_servers; 229 230 xics->ss = g_malloc0(xics->nr_servers * sizeof(ICPState)); 231 for (i = 0; i < xics->nr_servers; i++) { 232 char buffer[32]; 233 object_initialize(&xics->ss[i], sizeof(xics->ss[i]), TYPE_ICP); 234 snprintf(buffer, sizeof(buffer), "icp[%d]", i); 235 object_property_add_child(OBJECT(xics), buffer, OBJECT(&xics->ss[i]), 236 errp); 237 } 238 } 239 240 static void xics_spapr_realize(DeviceState *dev, Error **errp) 241 { 242 XICSState *xics = XICS_SPAPR(dev); 243 Error *error = NULL; 244 int i; 245 246 if (!xics->nr_servers) { 247 error_setg(errp, "Number of servers needs to be greater 0"); 248 return; 249 } 250 251 /* Registration of global state belongs into realize */ 252 spapr_rtas_register(RTAS_IBM_SET_XIVE, "ibm,set-xive", rtas_set_xive); 253 spapr_rtas_register(RTAS_IBM_GET_XIVE, "ibm,get-xive", rtas_get_xive); 254 spapr_rtas_register(RTAS_IBM_INT_OFF, "ibm,int-off", rtas_int_off); 255 spapr_rtas_register(RTAS_IBM_INT_ON, "ibm,int-on", rtas_int_on); 256 257 spapr_register_hypercall(H_CPPR, h_cppr); 258 spapr_register_hypercall(H_IPI, h_ipi); 259 spapr_register_hypercall(H_XIRR, h_xirr); 260 spapr_register_hypercall(H_XIRR_X, h_xirr_x); 261 spapr_register_hypercall(H_EOI, h_eoi); 262 spapr_register_hypercall(H_IPOLL, h_ipoll); 263 264 object_property_set_bool(OBJECT(xics->ics), true, "realized", &error); 265 if (error) { 266 error_propagate(errp, error); 267 return; 268 } 269 270 for (i = 0; i < xics->nr_servers; i++) { 271 object_property_set_bool(OBJECT(&xics->ss[i]), true, "realized", 272 &error); 273 if (error) { 274 error_propagate(errp, error); 275 return; 276 } 277 } 278 } 279 280 static void xics_spapr_initfn(Object *obj) 281 { 282 XICSState *xics = XICS_SPAPR(obj); 283 284 xics->ics = ICS(object_new(TYPE_ICS)); 285 object_property_add_child(obj, "ics", OBJECT(xics->ics), NULL); 286 xics->ics->xics = xics; 287 } 288 289 static void xics_spapr_class_init(ObjectClass *oc, void *data) 290 { 291 DeviceClass *dc = DEVICE_CLASS(oc); 292 XICSStateClass *xsc = XICS_SPAPR_CLASS(oc); 293 294 dc->realize = xics_spapr_realize; 295 xsc->set_nr_irqs = xics_spapr_set_nr_irqs; 296 xsc->set_nr_servers = xics_spapr_set_nr_servers; 297 } 298 299 static const TypeInfo xics_spapr_info = { 300 .name = TYPE_XICS_SPAPR, 301 .parent = TYPE_XICS_COMMON, 302 .instance_size = sizeof(XICSState), 303 .class_size = sizeof(XICSStateClass), 304 .class_init = xics_spapr_class_init, 305 .instance_init = xics_spapr_initfn, 306 }; 307 308 #define ICS_IRQ_FREE(ics, srcno) \ 309 (!((ics)->irqs[(srcno)].flags & (XICS_FLAGS_IRQ_MASK))) 310 311 static int ics_find_free_block(ICSState *ics, int num, int alignnum) 312 { 313 int first, i; 314 315 for (first = 0; first < ics->nr_irqs; first += alignnum) { 316 if (num > (ics->nr_irqs - first)) { 317 return -1; 318 } 319 for (i = first; i < first + num; ++i) { 320 if (!ICS_IRQ_FREE(ics, i)) { 321 break; 322 } 323 } 324 if (i == (first + num)) { 325 return first; 326 } 327 } 328 329 return -1; 330 } 331 332 int xics_spapr_alloc(XICSState *xics, int src, int irq_hint, bool lsi, 333 Error **errp) 334 { 335 ICSState *ics = &xics->ics[src]; 336 int irq; 337 338 if (irq_hint) { 339 assert(src == xics_find_source(xics, irq_hint)); 340 if (!ICS_IRQ_FREE(ics, irq_hint - ics->offset)) { 341 error_setg(errp, "can't allocate IRQ %d: already in use", irq_hint); 342 return -1; 343 } 344 irq = irq_hint; 345 } else { 346 irq = ics_find_free_block(ics, 1, 1); 347 if (irq < 0) { 348 error_setg(errp, "can't allocate IRQ: no IRQ left"); 349 return -1; 350 } 351 irq += ics->offset; 352 } 353 354 ics_set_irq_type(ics, irq - ics->offset, lsi); 355 trace_xics_alloc(src, irq); 356 357 return irq; 358 } 359 360 /* 361 * Allocate block of consecutive IRQs, and return the number of the first IRQ in 362 * the block. If align==true, aligns the first IRQ number to num. 363 */ 364 int xics_spapr_alloc_block(XICSState *xics, int src, int num, bool lsi, 365 bool align, Error **errp) 366 { 367 int i, first = -1; 368 ICSState *ics = &xics->ics[src]; 369 370 assert(src == 0); 371 /* 372 * MSIMesage::data is used for storing VIRQ so 373 * it has to be aligned to num to support multiple 374 * MSI vectors. MSI-X is not affected by this. 375 * The hint is used for the first IRQ, the rest should 376 * be allocated continuously. 377 */ 378 if (align) { 379 assert((num == 1) || (num == 2) || (num == 4) || 380 (num == 8) || (num == 16) || (num == 32)); 381 first = ics_find_free_block(ics, num, num); 382 } else { 383 first = ics_find_free_block(ics, num, 1); 384 } 385 if (first < 0) { 386 error_setg(errp, "can't find a free %d-IRQ block", num); 387 return -1; 388 } 389 390 if (first >= 0) { 391 for (i = first; i < first + num; ++i) { 392 ics_set_irq_type(ics, i, lsi); 393 } 394 } 395 first += ics->offset; 396 397 trace_xics_alloc_block(src, first, num, lsi, align); 398 399 return first; 400 } 401 402 static void ics_free(ICSState *ics, int srcno, int num) 403 { 404 int i; 405 406 for (i = srcno; i < srcno + num; ++i) { 407 if (ICS_IRQ_FREE(ics, i)) { 408 trace_xics_ics_free_warn(ics - ics->xics->ics, i + ics->offset); 409 } 410 memset(&ics->irqs[i], 0, sizeof(ICSIRQState)); 411 } 412 } 413 414 void xics_spapr_free(XICSState *xics, int irq, int num) 415 { 416 int src = xics_find_source(xics, irq); 417 418 if (src >= 0) { 419 ICSState *ics = &xics->ics[src]; 420 421 /* FIXME: implement multiple sources */ 422 assert(src == 0); 423 424 trace_xics_ics_free(ics - xics->ics, irq, num); 425 ics_free(ics, irq - ics->offset, num); 426 } 427 } 428 429 static void xics_spapr_register_types(void) 430 { 431 type_register_static(&xics_spapr_info); 432 } 433 434 type_init(xics_spapr_register_types) 435