1 /* 2 * QEMU PowerPC PowerNV Processor Service Interface (PSI) model 3 * 4 * Copyright (c) 2015-2017, IBM Corporation. 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include "qemu/osdep.h" 21 #include "hw/irq.h" 22 #include "target/ppc/cpu.h" 23 #include "qemu/log.h" 24 #include "qemu/module.h" 25 #include "sysemu/reset.h" 26 #include "qapi/error.h" 27 #include "monitor/monitor.h" 28 29 #include "exec/address-spaces.h" 30 31 #include "hw/ppc/fdt.h" 32 #include "hw/ppc/pnv.h" 33 #include "hw/ppc/pnv_xscom.h" 34 #include "hw/qdev-properties.h" 35 #include "hw/ppc/pnv_psi.h" 36 37 #include <libfdt.h> 38 39 #define PSIHB_XSCOM_FIR_RW 0x00 40 #define PSIHB_XSCOM_FIR_AND 0x01 41 #define PSIHB_XSCOM_FIR_OR 0x02 42 #define PSIHB_XSCOM_FIRMASK_RW 0x03 43 #define PSIHB_XSCOM_FIRMASK_AND 0x04 44 #define PSIHB_XSCOM_FIRMASK_OR 0x05 45 #define PSIHB_XSCOM_FIRACT0 0x06 46 #define PSIHB_XSCOM_FIRACT1 0x07 47 48 /* Host Bridge Base Address Register */ 49 #define PSIHB_XSCOM_BAR 0x0a 50 #define PSIHB_BAR_EN 0x0000000000000001ull 51 52 /* FSP Base Address Register */ 53 #define PSIHB_XSCOM_FSPBAR 0x0b 54 55 /* PSI Host Bridge Control/Status Register */ 56 #define PSIHB_XSCOM_CR 0x0e 57 #define PSIHB_CR_FSP_CMD_ENABLE 0x8000000000000000ull 58 #define PSIHB_CR_FSP_MMIO_ENABLE 0x4000000000000000ull 59 #define PSIHB_CR_FSP_IRQ_ENABLE 0x1000000000000000ull 60 #define PSIHB_CR_FSP_ERR_RSP_ENABLE 0x0800000000000000ull 61 #define PSIHB_CR_PSI_LINK_ENABLE 0x0400000000000000ull 62 #define PSIHB_CR_FSP_RESET 0x0200000000000000ull 63 #define PSIHB_CR_PSIHB_RESET 0x0100000000000000ull 64 #define PSIHB_CR_PSI_IRQ 0x0000800000000000ull 65 #define PSIHB_CR_FSP_IRQ 0x0000400000000000ull 66 #define PSIHB_CR_FSP_LINK_ACTIVE 0x0000200000000000ull 67 #define PSIHB_CR_IRQ_CMD_EXPECT 0x0000010000000000ull 68 /* and more ... */ 69 70 /* PSIHB Status / Error Mask Register */ 71 #define PSIHB_XSCOM_SEMR 0x0f 72 73 /* XIVR, to signal interrupts to the CEC firmware. more XIVR below. */ 74 #define PSIHB_XSCOM_XIVR_FSP 0x10 75 #define PSIHB_XIVR_SERVER_SH 40 76 #define PSIHB_XIVR_SERVER_MSK (0xffffull << PSIHB_XIVR_SERVER_SH) 77 #define PSIHB_XIVR_PRIO_SH 32 78 #define PSIHB_XIVR_PRIO_MSK (0xffull << PSIHB_XIVR_PRIO_SH) 79 #define PSIHB_XIVR_SRC_SH 29 80 #define PSIHB_XIVR_SRC_MSK (0x7ull << PSIHB_XIVR_SRC_SH) 81 #define PSIHB_XIVR_PENDING 0x01000000ull 82 83 /* PSI Host Bridge Set Control/ Status Register */ 84 #define PSIHB_XSCOM_SCR 0x12 85 86 /* PSI Host Bridge Clear Control/ Status Register */ 87 #define PSIHB_XSCOM_CCR 0x13 88 89 /* DMA Upper Address Register */ 90 #define PSIHB_XSCOM_DMA_UPADD 0x14 91 92 /* Interrupt Status */ 93 #define PSIHB_XSCOM_IRQ_STAT 0x15 94 #define PSIHB_IRQ_STAT_OCC 0x0000001000000000ull 95 #define PSIHB_IRQ_STAT_FSI 0x0000000800000000ull 96 #define PSIHB_IRQ_STAT_LPCI2C 0x0000000400000000ull 97 #define PSIHB_IRQ_STAT_LOCERR 0x0000000200000000ull 98 #define PSIHB_IRQ_STAT_EXT 0x0000000100000000ull 99 100 /* remaining XIVR */ 101 #define PSIHB_XSCOM_XIVR_OCC 0x16 102 #define PSIHB_XSCOM_XIVR_FSI 0x17 103 #define PSIHB_XSCOM_XIVR_LPCI2C 0x18 104 #define PSIHB_XSCOM_XIVR_LOCERR 0x19 105 #define PSIHB_XSCOM_XIVR_EXT 0x1a 106 107 /* Interrupt Requester Source Compare Register */ 108 #define PSIHB_XSCOM_IRSN 0x1b 109 #define PSIHB_IRSN_COMP_SH 45 110 #define PSIHB_IRSN_COMP_MSK (0x7ffffull << PSIHB_IRSN_COMP_SH) 111 #define PSIHB_IRSN_IRQ_MUX 0x0000000800000000ull 112 #define PSIHB_IRSN_IRQ_RESET 0x0000000400000000ull 113 #define PSIHB_IRSN_DOWNSTREAM_EN 0x0000000200000000ull 114 #define PSIHB_IRSN_UPSTREAM_EN 0x0000000100000000ull 115 #define PSIHB_IRSN_COMPMASK_SH 13 116 #define PSIHB_IRSN_COMPMASK_MSK (0x7ffffull << PSIHB_IRSN_COMPMASK_SH) 117 118 #define PSIHB_BAR_MASK 0x0003fffffff00000ull 119 #define PSIHB_FSPBAR_MASK 0x0003ffff00000000ull 120 121 #define PSIHB9_BAR_MASK 0x00fffffffff00000ull 122 #define PSIHB9_FSPBAR_MASK 0x00ffffff00000000ull 123 124 #define PSIHB_REG(addr) (((addr) >> 3) + PSIHB_XSCOM_BAR) 125 126 static void pnv_psi_set_bar(PnvPsi *psi, uint64_t bar) 127 { 128 PnvPsiClass *ppc = PNV_PSI_GET_CLASS(psi); 129 MemoryRegion *sysmem = get_system_memory(); 130 uint64_t old = psi->regs[PSIHB_XSCOM_BAR]; 131 132 psi->regs[PSIHB_XSCOM_BAR] = bar & (ppc->bar_mask | PSIHB_BAR_EN); 133 134 /* Update MR, always remove it first */ 135 if (old & PSIHB_BAR_EN) { 136 memory_region_del_subregion(sysmem, &psi->regs_mr); 137 } 138 139 /* Then add it back if needed */ 140 if (bar & PSIHB_BAR_EN) { 141 uint64_t addr = bar & ppc->bar_mask; 142 memory_region_add_subregion(sysmem, addr, &psi->regs_mr); 143 } 144 } 145 146 static void pnv_psi_update_fsp_mr(PnvPsi *psi) 147 { 148 /* TODO: Update FSP MR if/when we support FSP BAR */ 149 } 150 151 static void pnv_psi_set_cr(PnvPsi *psi, uint64_t cr) 152 { 153 uint64_t old = psi->regs[PSIHB_XSCOM_CR]; 154 155 psi->regs[PSIHB_XSCOM_CR] = cr; 156 157 /* Check some bit changes */ 158 if ((old ^ psi->regs[PSIHB_XSCOM_CR]) & PSIHB_CR_FSP_MMIO_ENABLE) { 159 pnv_psi_update_fsp_mr(psi); 160 } 161 } 162 163 static void pnv_psi_set_irsn(PnvPsi *psi, uint64_t val) 164 { 165 ICSState *ics = &PNV8_PSI(psi)->ics; 166 167 /* In this model we ignore the up/down enable bits for now 168 * as SW doesn't use them (other than setting them at boot). 169 * We ignore IRQ_MUX, its meaning isn't clear and we don't use 170 * it and finally we ignore reset (XXX fix that ?) 171 */ 172 psi->regs[PSIHB_XSCOM_IRSN] = val & (PSIHB_IRSN_COMP_MSK | 173 PSIHB_IRSN_IRQ_MUX | 174 PSIHB_IRSN_IRQ_RESET | 175 PSIHB_IRSN_DOWNSTREAM_EN | 176 PSIHB_IRSN_UPSTREAM_EN); 177 178 /* We ignore the compare mask as well, our ICS emulation is too 179 * simplistic to make any use if it, and we extract the offset 180 * from the compare value 181 */ 182 ics->offset = (val & PSIHB_IRSN_COMP_MSK) >> PSIHB_IRSN_COMP_SH; 183 } 184 185 /* 186 * FSP and PSI interrupts are muxed under the same number. 187 */ 188 static const uint32_t xivr_regs[] = { 189 [PSIHB_IRQ_PSI] = PSIHB_XSCOM_XIVR_FSP, 190 [PSIHB_IRQ_FSP] = PSIHB_XSCOM_XIVR_FSP, 191 [PSIHB_IRQ_OCC] = PSIHB_XSCOM_XIVR_OCC, 192 [PSIHB_IRQ_FSI] = PSIHB_XSCOM_XIVR_FSI, 193 [PSIHB_IRQ_LPC_I2C] = PSIHB_XSCOM_XIVR_LPCI2C, 194 [PSIHB_IRQ_LOCAL_ERR] = PSIHB_XSCOM_XIVR_LOCERR, 195 [PSIHB_IRQ_EXTERNAL] = PSIHB_XSCOM_XIVR_EXT, 196 }; 197 198 static const uint32_t stat_regs[] = { 199 [PSIHB_IRQ_PSI] = PSIHB_XSCOM_CR, 200 [PSIHB_IRQ_FSP] = PSIHB_XSCOM_CR, 201 [PSIHB_IRQ_OCC] = PSIHB_XSCOM_IRQ_STAT, 202 [PSIHB_IRQ_FSI] = PSIHB_XSCOM_IRQ_STAT, 203 [PSIHB_IRQ_LPC_I2C] = PSIHB_XSCOM_IRQ_STAT, 204 [PSIHB_IRQ_LOCAL_ERR] = PSIHB_XSCOM_IRQ_STAT, 205 [PSIHB_IRQ_EXTERNAL] = PSIHB_XSCOM_IRQ_STAT, 206 }; 207 208 static const uint64_t stat_bits[] = { 209 [PSIHB_IRQ_PSI] = PSIHB_CR_PSI_IRQ, 210 [PSIHB_IRQ_FSP] = PSIHB_CR_FSP_IRQ, 211 [PSIHB_IRQ_OCC] = PSIHB_IRQ_STAT_OCC, 212 [PSIHB_IRQ_FSI] = PSIHB_IRQ_STAT_FSI, 213 [PSIHB_IRQ_LPC_I2C] = PSIHB_IRQ_STAT_LPCI2C, 214 [PSIHB_IRQ_LOCAL_ERR] = PSIHB_IRQ_STAT_LOCERR, 215 [PSIHB_IRQ_EXTERNAL] = PSIHB_IRQ_STAT_EXT, 216 }; 217 218 void pnv_psi_irq_set(PnvPsi *psi, int irq, bool state) 219 { 220 PNV_PSI_GET_CLASS(psi)->irq_set(psi, irq, state); 221 } 222 223 static void pnv_psi_power8_irq_set(PnvPsi *psi, int irq, bool state) 224 { 225 uint32_t xivr_reg; 226 uint32_t stat_reg; 227 uint32_t src; 228 bool masked; 229 230 if (irq > PSIHB_IRQ_EXTERNAL) { 231 qemu_log_mask(LOG_GUEST_ERROR, "PSI: Unsupported irq %d\n", irq); 232 return; 233 } 234 235 xivr_reg = xivr_regs[irq]; 236 stat_reg = stat_regs[irq]; 237 238 src = (psi->regs[xivr_reg] & PSIHB_XIVR_SRC_MSK) >> PSIHB_XIVR_SRC_SH; 239 if (state) { 240 psi->regs[stat_reg] |= stat_bits[irq]; 241 /* TODO: optimization, check mask here. That means 242 * re-evaluating when unmasking 243 */ 244 qemu_irq_raise(psi->qirqs[src]); 245 } else { 246 psi->regs[stat_reg] &= ~stat_bits[irq]; 247 248 /* FSP and PSI are muxed so don't lower if either is still set */ 249 if (stat_reg != PSIHB_XSCOM_CR || 250 !(psi->regs[stat_reg] & (PSIHB_CR_PSI_IRQ | PSIHB_CR_FSP_IRQ))) { 251 qemu_irq_lower(psi->qirqs[src]); 252 } else { 253 state = true; 254 } 255 } 256 257 /* Note about the emulation of the pending bit: This isn't 258 * entirely correct. The pending bit should be cleared when the 259 * EOI has been received. However, we don't have callbacks on EOI 260 * (especially not under KVM) so no way to emulate that properly, 261 * so instead we just set that bit as the logical "output" of the 262 * XIVR (ie pending & !masked) 263 * 264 * CLG: We could define a new ICS object with a custom eoi() 265 * handler to clear the pending bit. But I am not sure this would 266 * be useful for the software anyhow. 267 */ 268 masked = (psi->regs[xivr_reg] & PSIHB_XIVR_PRIO_MSK) == PSIHB_XIVR_PRIO_MSK; 269 if (state && !masked) { 270 psi->regs[xivr_reg] |= PSIHB_XIVR_PENDING; 271 } else { 272 psi->regs[xivr_reg] &= ~PSIHB_XIVR_PENDING; 273 } 274 } 275 276 static void pnv_psi_set_xivr(PnvPsi *psi, uint32_t reg, uint64_t val) 277 { 278 ICSState *ics = &PNV8_PSI(psi)->ics; 279 uint16_t server; 280 uint8_t prio; 281 uint8_t src; 282 283 psi->regs[reg] = (psi->regs[reg] & PSIHB_XIVR_PENDING) | 284 (val & (PSIHB_XIVR_SERVER_MSK | 285 PSIHB_XIVR_PRIO_MSK | 286 PSIHB_XIVR_SRC_MSK)); 287 val = psi->regs[reg]; 288 server = (val & PSIHB_XIVR_SERVER_MSK) >> PSIHB_XIVR_SERVER_SH; 289 prio = (val & PSIHB_XIVR_PRIO_MSK) >> PSIHB_XIVR_PRIO_SH; 290 src = (val & PSIHB_XIVR_SRC_MSK) >> PSIHB_XIVR_SRC_SH; 291 292 if (src >= PSI_NUM_INTERRUPTS) { 293 qemu_log_mask(LOG_GUEST_ERROR, "PSI: Unsupported irq %d\n", src); 294 return; 295 } 296 297 /* Remove pending bit if the IRQ is masked */ 298 if ((psi->regs[reg] & PSIHB_XIVR_PRIO_MSK) == PSIHB_XIVR_PRIO_MSK) { 299 psi->regs[reg] &= ~PSIHB_XIVR_PENDING; 300 } 301 302 /* The low order 2 bits are the link pointer (Type II interrupts). 303 * Shift back to get a valid IRQ server. 304 */ 305 server >>= 2; 306 307 /* Now because of source remapping, weird things can happen 308 * if you change the source number dynamically, our simple ICS 309 * doesn't deal with remapping. So we just poke a different 310 * ICS entry based on what source number was written. This will 311 * do for now but a more accurate implementation would instead 312 * use a fixed server/prio and a remapper of the generated irq. 313 */ 314 ics_write_xive(ics, src, server, prio, prio); 315 } 316 317 static uint64_t pnv_psi_reg_read(PnvPsi *psi, uint32_t offset, bool mmio) 318 { 319 uint64_t val = 0xffffffffffffffffull; 320 321 switch (offset) { 322 case PSIHB_XSCOM_FIR_RW: 323 case PSIHB_XSCOM_FIRACT0: 324 case PSIHB_XSCOM_FIRACT1: 325 case PSIHB_XSCOM_BAR: 326 case PSIHB_XSCOM_FSPBAR: 327 case PSIHB_XSCOM_CR: 328 case PSIHB_XSCOM_XIVR_FSP: 329 case PSIHB_XSCOM_XIVR_OCC: 330 case PSIHB_XSCOM_XIVR_FSI: 331 case PSIHB_XSCOM_XIVR_LPCI2C: 332 case PSIHB_XSCOM_XIVR_LOCERR: 333 case PSIHB_XSCOM_XIVR_EXT: 334 case PSIHB_XSCOM_IRQ_STAT: 335 case PSIHB_XSCOM_SEMR: 336 case PSIHB_XSCOM_DMA_UPADD: 337 case PSIHB_XSCOM_IRSN: 338 val = psi->regs[offset]; 339 break; 340 default: 341 qemu_log_mask(LOG_UNIMP, "PSI: read at 0x%" PRIx32 "\n", offset); 342 } 343 return val; 344 } 345 346 static void pnv_psi_reg_write(PnvPsi *psi, uint32_t offset, uint64_t val, 347 bool mmio) 348 { 349 switch (offset) { 350 case PSIHB_XSCOM_FIR_RW: 351 case PSIHB_XSCOM_FIRACT0: 352 case PSIHB_XSCOM_FIRACT1: 353 case PSIHB_XSCOM_SEMR: 354 case PSIHB_XSCOM_DMA_UPADD: 355 psi->regs[offset] = val; 356 break; 357 case PSIHB_XSCOM_FIR_OR: 358 psi->regs[PSIHB_XSCOM_FIR_RW] |= val; 359 break; 360 case PSIHB_XSCOM_FIR_AND: 361 psi->regs[PSIHB_XSCOM_FIR_RW] &= val; 362 break; 363 case PSIHB_XSCOM_BAR: 364 /* Only XSCOM can write this one */ 365 if (!mmio) { 366 pnv_psi_set_bar(psi, val); 367 } else { 368 qemu_log_mask(LOG_GUEST_ERROR, "PSI: invalid write of BAR\n"); 369 } 370 break; 371 case PSIHB_XSCOM_FSPBAR: 372 psi->regs[PSIHB_XSCOM_FSPBAR] = val & PSIHB_FSPBAR_MASK; 373 pnv_psi_update_fsp_mr(psi); 374 break; 375 case PSIHB_XSCOM_CR: 376 pnv_psi_set_cr(psi, val); 377 break; 378 case PSIHB_XSCOM_SCR: 379 pnv_psi_set_cr(psi, psi->regs[PSIHB_XSCOM_CR] | val); 380 break; 381 case PSIHB_XSCOM_CCR: 382 pnv_psi_set_cr(psi, psi->regs[PSIHB_XSCOM_CR] & ~val); 383 break; 384 case PSIHB_XSCOM_XIVR_FSP: 385 case PSIHB_XSCOM_XIVR_OCC: 386 case PSIHB_XSCOM_XIVR_FSI: 387 case PSIHB_XSCOM_XIVR_LPCI2C: 388 case PSIHB_XSCOM_XIVR_LOCERR: 389 case PSIHB_XSCOM_XIVR_EXT: 390 pnv_psi_set_xivr(psi, offset, val); 391 break; 392 case PSIHB_XSCOM_IRQ_STAT: 393 /* Read only */ 394 qemu_log_mask(LOG_GUEST_ERROR, "PSI: invalid write of IRQ_STAT\n"); 395 break; 396 case PSIHB_XSCOM_IRSN: 397 pnv_psi_set_irsn(psi, val); 398 break; 399 default: 400 qemu_log_mask(LOG_UNIMP, "PSI: write at 0x%" PRIx32 "\n", offset); 401 } 402 } 403 404 /* 405 * The values of the registers when accessed through the MMIO region 406 * follow the relation : xscom = (mmio + 0x50) >> 3 407 */ 408 static uint64_t pnv_psi_mmio_read(void *opaque, hwaddr addr, unsigned size) 409 { 410 return pnv_psi_reg_read(opaque, PSIHB_REG(addr), true); 411 } 412 413 static void pnv_psi_mmio_write(void *opaque, hwaddr addr, 414 uint64_t val, unsigned size) 415 { 416 pnv_psi_reg_write(opaque, PSIHB_REG(addr), val, true); 417 } 418 419 static const MemoryRegionOps psi_mmio_ops = { 420 .read = pnv_psi_mmio_read, 421 .write = pnv_psi_mmio_write, 422 .endianness = DEVICE_BIG_ENDIAN, 423 .valid = { 424 .min_access_size = 8, 425 .max_access_size = 8, 426 }, 427 .impl = { 428 .min_access_size = 8, 429 .max_access_size = 8, 430 }, 431 }; 432 433 static uint64_t pnv_psi_xscom_read(void *opaque, hwaddr addr, unsigned size) 434 { 435 return pnv_psi_reg_read(opaque, addr >> 3, false); 436 } 437 438 static void pnv_psi_xscom_write(void *opaque, hwaddr addr, 439 uint64_t val, unsigned size) 440 { 441 pnv_psi_reg_write(opaque, addr >> 3, val, false); 442 } 443 444 static const MemoryRegionOps pnv_psi_xscom_ops = { 445 .read = pnv_psi_xscom_read, 446 .write = pnv_psi_xscom_write, 447 .endianness = DEVICE_BIG_ENDIAN, 448 .valid = { 449 .min_access_size = 8, 450 .max_access_size = 8, 451 }, 452 .impl = { 453 .min_access_size = 8, 454 .max_access_size = 8, 455 } 456 }; 457 458 static void pnv_psi_reset(void *dev) 459 { 460 PnvPsi *psi = PNV_PSI(dev); 461 462 memset(psi->regs, 0x0, sizeof(psi->regs)); 463 464 psi->regs[PSIHB_XSCOM_BAR] = psi->bar | PSIHB_BAR_EN; 465 } 466 467 static void pnv_psi_power8_instance_init(Object *obj) 468 { 469 Pnv8Psi *psi8 = PNV8_PSI(obj); 470 471 object_initialize_child(obj, "ics-psi", &psi8->ics, sizeof(psi8->ics), 472 TYPE_ICS, &error_abort, NULL); 473 } 474 475 static const uint8_t irq_to_xivr[] = { 476 PSIHB_XSCOM_XIVR_FSP, 477 PSIHB_XSCOM_XIVR_OCC, 478 PSIHB_XSCOM_XIVR_FSI, 479 PSIHB_XSCOM_XIVR_LPCI2C, 480 PSIHB_XSCOM_XIVR_LOCERR, 481 PSIHB_XSCOM_XIVR_EXT, 482 }; 483 484 static void pnv_psi_power8_realize(DeviceState *dev, Error **errp) 485 { 486 PnvPsi *psi = PNV_PSI(dev); 487 ICSState *ics = &PNV8_PSI(psi)->ics; 488 Object *obj; 489 Error *err = NULL; 490 unsigned int i; 491 492 obj = object_property_get_link(OBJECT(dev), "xics", &err); 493 if (!obj) { 494 error_setg(errp, "%s: required link 'xics' not found: %s", 495 __func__, error_get_pretty(err)); 496 return; 497 } 498 499 /* Create PSI interrupt control source */ 500 object_property_set_link(OBJECT(ics), obj, ICS_PROP_XICS, &error_abort); 501 object_property_set_int(OBJECT(ics), PSI_NUM_INTERRUPTS, "nr-irqs", &err); 502 if (err) { 503 error_propagate(errp, err); 504 return; 505 } 506 object_property_set_bool(OBJECT(ics), true, "realized", &err); 507 if (err) { 508 error_propagate(errp, err); 509 return; 510 } 511 512 for (i = 0; i < ics->nr_irqs; i++) { 513 ics_set_irq_type(ics, i, true); 514 } 515 516 psi->qirqs = qemu_allocate_irqs(ics_set_irq, ics, ics->nr_irqs); 517 518 /* XSCOM region for PSI registers */ 519 pnv_xscom_region_init(&psi->xscom_regs, OBJECT(dev), &pnv_psi_xscom_ops, 520 psi, "xscom-psi", PNV_XSCOM_PSIHB_SIZE); 521 522 /* Initialize MMIO region */ 523 memory_region_init_io(&psi->regs_mr, OBJECT(dev), &psi_mmio_ops, psi, 524 "psihb", PNV_PSIHB_SIZE); 525 526 /* Default BAR for MMIO region */ 527 pnv_psi_set_bar(psi, psi->bar | PSIHB_BAR_EN); 528 529 /* Default sources in XIVR */ 530 for (i = 0; i < PSI_NUM_INTERRUPTS; i++) { 531 uint8_t xivr = irq_to_xivr[i]; 532 psi->regs[xivr] = PSIHB_XIVR_PRIO_MSK | 533 ((uint64_t) i << PSIHB_XIVR_SRC_SH); 534 } 535 536 qemu_register_reset(pnv_psi_reset, dev); 537 } 538 539 static int pnv_psi_dt_xscom(PnvXScomInterface *dev, void *fdt, int xscom_offset) 540 { 541 PnvPsiClass *ppc = PNV_PSI_GET_CLASS(dev); 542 char *name; 543 int offset; 544 uint32_t reg[] = { 545 cpu_to_be32(ppc->xscom_pcba), 546 cpu_to_be32(ppc->xscom_size) 547 }; 548 549 name = g_strdup_printf("psihb@%x", ppc->xscom_pcba); 550 offset = fdt_add_subnode(fdt, xscom_offset, name); 551 _FDT(offset); 552 g_free(name); 553 554 _FDT(fdt_setprop(fdt, offset, "reg", reg, sizeof(reg))); 555 _FDT(fdt_setprop_cell(fdt, offset, "#address-cells", 2)); 556 _FDT(fdt_setprop_cell(fdt, offset, "#size-cells", 1)); 557 _FDT(fdt_setprop(fdt, offset, "compatible", ppc->compat, 558 ppc->compat_size)); 559 return 0; 560 } 561 562 static Property pnv_psi_properties[] = { 563 DEFINE_PROP_UINT64("bar", PnvPsi, bar, 0), 564 DEFINE_PROP_UINT64("fsp-bar", PnvPsi, fsp_bar, 0), 565 DEFINE_PROP_END_OF_LIST(), 566 }; 567 568 static void pnv_psi_power8_class_init(ObjectClass *klass, void *data) 569 { 570 DeviceClass *dc = DEVICE_CLASS(klass); 571 PnvPsiClass *ppc = PNV_PSI_CLASS(klass); 572 static const char compat[] = "ibm,power8-psihb-x\0ibm,psihb-x"; 573 574 dc->desc = "PowerNV PSI Controller POWER8"; 575 dc->realize = pnv_psi_power8_realize; 576 577 ppc->xscom_pcba = PNV_XSCOM_PSIHB_BASE; 578 ppc->xscom_size = PNV_XSCOM_PSIHB_SIZE; 579 ppc->bar_mask = PSIHB_BAR_MASK; 580 ppc->irq_set = pnv_psi_power8_irq_set; 581 ppc->compat = compat; 582 ppc->compat_size = sizeof(compat); 583 } 584 585 static const TypeInfo pnv_psi_power8_info = { 586 .name = TYPE_PNV8_PSI, 587 .parent = TYPE_PNV_PSI, 588 .instance_size = sizeof(Pnv8Psi), 589 .instance_init = pnv_psi_power8_instance_init, 590 .class_init = pnv_psi_power8_class_init, 591 }; 592 593 594 /* Common registers */ 595 596 #define PSIHB9_CR 0x20 597 #define PSIHB9_SEMR 0x28 598 599 /* P9 registers */ 600 601 #define PSIHB9_INTERRUPT_CONTROL 0x58 602 #define PSIHB9_IRQ_METHOD PPC_BIT(0) 603 #define PSIHB9_IRQ_RESET PPC_BIT(1) 604 #define PSIHB9_ESB_CI_BASE 0x60 605 #define PSIHB9_ESB_CI_64K PPC_BIT(1) 606 #define PSIHB9_ESB_CI_ADDR_MASK PPC_BITMASK(8, 47) 607 #define PSIHB9_ESB_CI_VALID PPC_BIT(63) 608 #define PSIHB9_ESB_NOTIF_ADDR 0x68 609 #define PSIHB9_ESB_NOTIF_ADDR_MASK PPC_BITMASK(8, 60) 610 #define PSIHB9_ESB_NOTIF_VALID PPC_BIT(63) 611 #define PSIHB9_IVT_OFFSET 0x70 612 #define PSIHB9_IVT_OFF_SHIFT 32 613 614 #define PSIHB9_IRQ_LEVEL 0x78 /* assertion */ 615 #define PSIHB9_IRQ_LEVEL_PSI PPC_BIT(0) 616 #define PSIHB9_IRQ_LEVEL_OCC PPC_BIT(1) 617 #define PSIHB9_IRQ_LEVEL_FSI PPC_BIT(2) 618 #define PSIHB9_IRQ_LEVEL_LPCHC PPC_BIT(3) 619 #define PSIHB9_IRQ_LEVEL_LOCAL_ERR PPC_BIT(4) 620 #define PSIHB9_IRQ_LEVEL_GLOBAL_ERR PPC_BIT(5) 621 #define PSIHB9_IRQ_LEVEL_TPM PPC_BIT(6) 622 #define PSIHB9_IRQ_LEVEL_LPC_SIRQ1 PPC_BIT(7) 623 #define PSIHB9_IRQ_LEVEL_LPC_SIRQ2 PPC_BIT(8) 624 #define PSIHB9_IRQ_LEVEL_LPC_SIRQ3 PPC_BIT(9) 625 #define PSIHB9_IRQ_LEVEL_LPC_SIRQ4 PPC_BIT(10) 626 #define PSIHB9_IRQ_LEVEL_SBE_I2C PPC_BIT(11) 627 #define PSIHB9_IRQ_LEVEL_DIO PPC_BIT(12) 628 #define PSIHB9_IRQ_LEVEL_PSU PPC_BIT(13) 629 #define PSIHB9_IRQ_LEVEL_I2C_C PPC_BIT(14) 630 #define PSIHB9_IRQ_LEVEL_I2C_D PPC_BIT(15) 631 #define PSIHB9_IRQ_LEVEL_I2C_E PPC_BIT(16) 632 #define PSIHB9_IRQ_LEVEL_SBE PPC_BIT(19) 633 634 #define PSIHB9_IRQ_STAT 0x80 /* P bit */ 635 #define PSIHB9_IRQ_STAT_PSI PPC_BIT(0) 636 #define PSIHB9_IRQ_STAT_OCC PPC_BIT(1) 637 #define PSIHB9_IRQ_STAT_FSI PPC_BIT(2) 638 #define PSIHB9_IRQ_STAT_LPCHC PPC_BIT(3) 639 #define PSIHB9_IRQ_STAT_LOCAL_ERR PPC_BIT(4) 640 #define PSIHB9_IRQ_STAT_GLOBAL_ERR PPC_BIT(5) 641 #define PSIHB9_IRQ_STAT_TPM PPC_BIT(6) 642 #define PSIHB9_IRQ_STAT_LPC_SIRQ1 PPC_BIT(7) 643 #define PSIHB9_IRQ_STAT_LPC_SIRQ2 PPC_BIT(8) 644 #define PSIHB9_IRQ_STAT_LPC_SIRQ3 PPC_BIT(9) 645 #define PSIHB9_IRQ_STAT_LPC_SIRQ4 PPC_BIT(10) 646 #define PSIHB9_IRQ_STAT_SBE_I2C PPC_BIT(11) 647 #define PSIHB9_IRQ_STAT_DIO PPC_BIT(12) 648 #define PSIHB9_IRQ_STAT_PSU PPC_BIT(13) 649 650 static void pnv_psi_notify(XiveNotifier *xf, uint32_t srcno) 651 { 652 PnvPsi *psi = PNV_PSI(xf); 653 uint64_t notif_port = psi->regs[PSIHB_REG(PSIHB9_ESB_NOTIF_ADDR)]; 654 bool valid = notif_port & PSIHB9_ESB_NOTIF_VALID; 655 uint64_t notify_addr = notif_port & ~PSIHB9_ESB_NOTIF_VALID; 656 657 uint32_t offset = 658 (psi->regs[PSIHB_REG(PSIHB9_IVT_OFFSET)] >> PSIHB9_IVT_OFF_SHIFT); 659 uint64_t data = XIVE_TRIGGER_PQ | offset | srcno; 660 MemTxResult result; 661 662 if (!valid) { 663 return; 664 } 665 666 address_space_stq_be(&address_space_memory, notify_addr, data, 667 MEMTXATTRS_UNSPECIFIED, &result); 668 if (result != MEMTX_OK) { 669 qemu_log_mask(LOG_GUEST_ERROR, "%s: trigger failed @%" 670 HWADDR_PRIx "\n", __func__, notif_port); 671 return; 672 } 673 } 674 675 static uint64_t pnv_psi_p9_mmio_read(void *opaque, hwaddr addr, unsigned size) 676 { 677 PnvPsi *psi = PNV_PSI(opaque); 678 uint32_t reg = PSIHB_REG(addr); 679 uint64_t val = -1; 680 681 switch (addr) { 682 case PSIHB9_CR: 683 case PSIHB9_SEMR: 684 /* FSP stuff */ 685 case PSIHB9_INTERRUPT_CONTROL: 686 case PSIHB9_ESB_CI_BASE: 687 case PSIHB9_ESB_NOTIF_ADDR: 688 case PSIHB9_IVT_OFFSET: 689 val = psi->regs[reg]; 690 break; 691 default: 692 qemu_log_mask(LOG_GUEST_ERROR, "PSI: read at 0x%" PRIx64 "\n", addr); 693 } 694 695 return val; 696 } 697 698 static void pnv_psi_p9_mmio_write(void *opaque, hwaddr addr, 699 uint64_t val, unsigned size) 700 { 701 PnvPsi *psi = PNV_PSI(opaque); 702 Pnv9Psi *psi9 = PNV9_PSI(psi); 703 uint32_t reg = PSIHB_REG(addr); 704 MemoryRegion *sysmem = get_system_memory(); 705 706 switch (addr) { 707 case PSIHB9_CR: 708 case PSIHB9_SEMR: 709 /* FSP stuff */ 710 break; 711 case PSIHB9_INTERRUPT_CONTROL: 712 if (val & PSIHB9_IRQ_RESET) { 713 device_reset(DEVICE(&psi9->source)); 714 } 715 psi->regs[reg] = val; 716 break; 717 718 case PSIHB9_ESB_CI_BASE: 719 if (!(val & PSIHB9_ESB_CI_VALID)) { 720 if (psi->regs[reg] & PSIHB9_ESB_CI_VALID) { 721 memory_region_del_subregion(sysmem, &psi9->source.esb_mmio); 722 } 723 } else { 724 if (!(psi->regs[reg] & PSIHB9_ESB_CI_VALID)) { 725 memory_region_add_subregion(sysmem, 726 val & ~PSIHB9_ESB_CI_VALID, 727 &psi9->source.esb_mmio); 728 } 729 } 730 psi->regs[reg] = val; 731 break; 732 733 case PSIHB9_ESB_NOTIF_ADDR: 734 psi->regs[reg] = val; 735 break; 736 case PSIHB9_IVT_OFFSET: 737 psi->regs[reg] = val; 738 break; 739 default: 740 qemu_log_mask(LOG_GUEST_ERROR, "PSI: write at 0x%" PRIx64 "\n", addr); 741 } 742 } 743 744 static const MemoryRegionOps pnv_psi_p9_mmio_ops = { 745 .read = pnv_psi_p9_mmio_read, 746 .write = pnv_psi_p9_mmio_write, 747 .endianness = DEVICE_BIG_ENDIAN, 748 .valid = { 749 .min_access_size = 8, 750 .max_access_size = 8, 751 }, 752 .impl = { 753 .min_access_size = 8, 754 .max_access_size = 8, 755 }, 756 }; 757 758 static uint64_t pnv_psi_p9_xscom_read(void *opaque, hwaddr addr, unsigned size) 759 { 760 /* No read are expected */ 761 qemu_log_mask(LOG_GUEST_ERROR, "PSI: xscom read at 0x%" PRIx64 "\n", addr); 762 return -1; 763 } 764 765 static void pnv_psi_p9_xscom_write(void *opaque, hwaddr addr, 766 uint64_t val, unsigned size) 767 { 768 PnvPsi *psi = PNV_PSI(opaque); 769 770 /* XSCOM is only used to set the PSIHB MMIO region */ 771 switch (addr >> 3) { 772 case PSIHB_XSCOM_BAR: 773 pnv_psi_set_bar(psi, val); 774 break; 775 default: 776 qemu_log_mask(LOG_GUEST_ERROR, "PSI: xscom write at 0x%" PRIx64 "\n", 777 addr); 778 } 779 } 780 781 static const MemoryRegionOps pnv_psi_p9_xscom_ops = { 782 .read = pnv_psi_p9_xscom_read, 783 .write = pnv_psi_p9_xscom_write, 784 .endianness = DEVICE_BIG_ENDIAN, 785 .valid = { 786 .min_access_size = 8, 787 .max_access_size = 8, 788 }, 789 .impl = { 790 .min_access_size = 8, 791 .max_access_size = 8, 792 } 793 }; 794 795 static void pnv_psi_power9_irq_set(PnvPsi *psi, int irq, bool state) 796 { 797 uint64_t irq_method = psi->regs[PSIHB_REG(PSIHB9_INTERRUPT_CONTROL)]; 798 799 if (irq > PSIHB9_NUM_IRQS) { 800 qemu_log_mask(LOG_GUEST_ERROR, "PSI: Unsupported irq %d\n", irq); 801 return; 802 } 803 804 if (irq_method & PSIHB9_IRQ_METHOD) { 805 qemu_log_mask(LOG_GUEST_ERROR, "PSI: LSI IRQ method no supported\n"); 806 return; 807 } 808 809 /* Update LSI levels */ 810 if (state) { 811 psi->regs[PSIHB_REG(PSIHB9_IRQ_LEVEL)] |= PPC_BIT(irq); 812 } else { 813 psi->regs[PSIHB_REG(PSIHB9_IRQ_LEVEL)] &= ~PPC_BIT(irq); 814 } 815 816 qemu_set_irq(psi->qirqs[irq], state); 817 } 818 819 static void pnv_psi_power9_reset(void *dev) 820 { 821 Pnv9Psi *psi = PNV9_PSI(dev); 822 823 pnv_psi_reset(dev); 824 825 if (memory_region_is_mapped(&psi->source.esb_mmio)) { 826 memory_region_del_subregion(get_system_memory(), &psi->source.esb_mmio); 827 } 828 } 829 830 static void pnv_psi_power9_instance_init(Object *obj) 831 { 832 Pnv9Psi *psi = PNV9_PSI(obj); 833 834 object_initialize_child(obj, "source", &psi->source, sizeof(psi->source), 835 TYPE_XIVE_SOURCE, &error_abort, NULL); 836 } 837 838 static void pnv_psi_power9_realize(DeviceState *dev, Error **errp) 839 { 840 PnvPsi *psi = PNV_PSI(dev); 841 XiveSource *xsrc = &PNV9_PSI(psi)->source; 842 Error *local_err = NULL; 843 int i; 844 845 /* This is the only device with 4k ESB pages */ 846 object_property_set_int(OBJECT(xsrc), XIVE_ESB_4K, "shift", 847 &error_fatal); 848 object_property_set_int(OBJECT(xsrc), PSIHB9_NUM_IRQS, "nr-irqs", 849 &error_fatal); 850 object_property_set_link(OBJECT(xsrc), OBJECT(psi), "xive", &error_abort); 851 object_property_set_bool(OBJECT(xsrc), true, "realized", &local_err); 852 if (local_err) { 853 error_propagate(errp, local_err); 854 return; 855 } 856 857 for (i = 0; i < xsrc->nr_irqs; i++) { 858 xive_source_irq_set_lsi(xsrc, i); 859 } 860 861 psi->qirqs = qemu_allocate_irqs(xive_source_set_irq, xsrc, xsrc->nr_irqs); 862 863 /* XSCOM region for PSI registers */ 864 pnv_xscom_region_init(&psi->xscom_regs, OBJECT(dev), &pnv_psi_p9_xscom_ops, 865 psi, "xscom-psi", PNV9_XSCOM_PSIHB_SIZE); 866 867 /* MMIO region for PSI registers */ 868 memory_region_init_io(&psi->regs_mr, OBJECT(dev), &pnv_psi_p9_mmio_ops, psi, 869 "psihb", PNV9_PSIHB_SIZE); 870 871 pnv_psi_set_bar(psi, psi->bar | PSIHB_BAR_EN); 872 873 qemu_register_reset(pnv_psi_power9_reset, dev); 874 } 875 876 static void pnv_psi_power9_class_init(ObjectClass *klass, void *data) 877 { 878 DeviceClass *dc = DEVICE_CLASS(klass); 879 PnvPsiClass *ppc = PNV_PSI_CLASS(klass); 880 XiveNotifierClass *xfc = XIVE_NOTIFIER_CLASS(klass); 881 static const char compat[] = "ibm,power9-psihb-x\0ibm,psihb-x"; 882 883 dc->desc = "PowerNV PSI Controller POWER9"; 884 dc->realize = pnv_psi_power9_realize; 885 886 ppc->xscom_pcba = PNV9_XSCOM_PSIHB_BASE; 887 ppc->xscom_size = PNV9_XSCOM_PSIHB_SIZE; 888 ppc->bar_mask = PSIHB9_BAR_MASK; 889 ppc->irq_set = pnv_psi_power9_irq_set; 890 ppc->compat = compat; 891 ppc->compat_size = sizeof(compat); 892 893 xfc->notify = pnv_psi_notify; 894 } 895 896 static const TypeInfo pnv_psi_power9_info = { 897 .name = TYPE_PNV9_PSI, 898 .parent = TYPE_PNV_PSI, 899 .instance_size = sizeof(Pnv9Psi), 900 .instance_init = pnv_psi_power9_instance_init, 901 .class_init = pnv_psi_power9_class_init, 902 .interfaces = (InterfaceInfo[]) { 903 { TYPE_XIVE_NOTIFIER }, 904 { }, 905 }, 906 }; 907 908 static void pnv_psi_power10_class_init(ObjectClass *klass, void *data) 909 { 910 DeviceClass *dc = DEVICE_CLASS(klass); 911 PnvPsiClass *ppc = PNV_PSI_CLASS(klass); 912 static const char compat[] = "ibm,power10-psihb-x\0ibm,psihb-x"; 913 914 dc->desc = "PowerNV PSI Controller POWER10"; 915 916 ppc->xscom_pcba = PNV10_XSCOM_PSIHB_BASE; 917 ppc->xscom_size = PNV10_XSCOM_PSIHB_SIZE; 918 ppc->compat = compat; 919 ppc->compat_size = sizeof(compat); 920 } 921 922 static const TypeInfo pnv_psi_power10_info = { 923 .name = TYPE_PNV10_PSI, 924 .parent = TYPE_PNV9_PSI, 925 .class_init = pnv_psi_power10_class_init, 926 }; 927 928 static void pnv_psi_class_init(ObjectClass *klass, void *data) 929 { 930 DeviceClass *dc = DEVICE_CLASS(klass); 931 PnvXScomInterfaceClass *xdc = PNV_XSCOM_INTERFACE_CLASS(klass); 932 933 xdc->dt_xscom = pnv_psi_dt_xscom; 934 935 dc->desc = "PowerNV PSI Controller"; 936 dc->props = pnv_psi_properties; 937 } 938 939 static const TypeInfo pnv_psi_info = { 940 .name = TYPE_PNV_PSI, 941 .parent = TYPE_SYS_BUS_DEVICE, 942 .instance_size = sizeof(PnvPsi), 943 .class_init = pnv_psi_class_init, 944 .class_size = sizeof(PnvPsiClass), 945 .abstract = true, 946 .interfaces = (InterfaceInfo[]) { 947 { TYPE_PNV_XSCOM_INTERFACE }, 948 { } 949 } 950 }; 951 952 static void pnv_psi_register_types(void) 953 { 954 type_register_static(&pnv_psi_info); 955 type_register_static(&pnv_psi_power8_info); 956 type_register_static(&pnv_psi_power9_info); 957 type_register_static(&pnv_psi_power10_info); 958 } 959 960 type_init(pnv_psi_register_types); 961 962 void pnv_psi_pic_print_info(Pnv9Psi *psi9, Monitor *mon) 963 { 964 PnvPsi *psi = PNV_PSI(psi9); 965 966 uint32_t offset = 967 (psi->regs[PSIHB_REG(PSIHB9_IVT_OFFSET)] >> PSIHB9_IVT_OFF_SHIFT); 968 969 monitor_printf(mon, "PSIHB Source %08x .. %08x\n", 970 offset, offset + psi9->source.nr_irqs - 1); 971 xive_source_pic_print_info(&psi9->source, offset, mon); 972 } 973