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 2.1 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 "exec/address-spaces.h" 22 #include "hw/irq.h" 23 #include "target/ppc/cpu.h" 24 #include "qemu/log.h" 25 #include "qemu/module.h" 26 #include "sysemu/reset.h" 27 #include "qapi/error.h" 28 #include "monitor/monitor.h" 29 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 /* mmio address to xscom address */ 125 #define PSIHB_REG(addr) (((addr) >> 3) + PSIHB_XSCOM_BAR) 126 127 /* xscom address to mmio address */ 128 #define PSIHB_MMIO(reg) ((reg - PSIHB_XSCOM_BAR) << 3) 129 130 static void pnv_psi_set_bar(PnvPsi *psi, uint64_t bar) 131 { 132 PnvPsiClass *ppc = PNV_PSI_GET_CLASS(psi); 133 MemoryRegion *sysmem = get_system_memory(); 134 uint64_t old = psi->regs[PSIHB_XSCOM_BAR]; 135 136 psi->regs[PSIHB_XSCOM_BAR] = bar & (ppc->bar_mask | PSIHB_BAR_EN); 137 138 /* Update MR, always remove it first */ 139 if (old & PSIHB_BAR_EN) { 140 memory_region_del_subregion(sysmem, &psi->regs_mr); 141 } 142 143 /* Then add it back if needed */ 144 if (bar & PSIHB_BAR_EN) { 145 uint64_t addr = bar & ppc->bar_mask; 146 memory_region_add_subregion(sysmem, addr, &psi->regs_mr); 147 } 148 } 149 150 static void pnv_psi_update_fsp_mr(PnvPsi *psi) 151 { 152 /* TODO: Update FSP MR if/when we support FSP BAR */ 153 } 154 155 static void pnv_psi_set_cr(PnvPsi *psi, uint64_t cr) 156 { 157 uint64_t old = psi->regs[PSIHB_XSCOM_CR]; 158 159 psi->regs[PSIHB_XSCOM_CR] = cr; 160 161 /* Check some bit changes */ 162 if ((old ^ psi->regs[PSIHB_XSCOM_CR]) & PSIHB_CR_FSP_MMIO_ENABLE) { 163 pnv_psi_update_fsp_mr(psi); 164 } 165 } 166 167 static void pnv_psi_set_irsn(PnvPsi *psi, uint64_t val) 168 { 169 ICSState *ics = &PNV8_PSI(psi)->ics; 170 171 /* In this model we ignore the up/down enable bits for now 172 * as SW doesn't use them (other than setting them at boot). 173 * We ignore IRQ_MUX, its meaning isn't clear and we don't use 174 * it and finally we ignore reset (XXX fix that ?) 175 */ 176 psi->regs[PSIHB_XSCOM_IRSN] = val & (PSIHB_IRSN_COMP_MSK | 177 PSIHB_IRSN_IRQ_MUX | 178 PSIHB_IRSN_IRQ_RESET | 179 PSIHB_IRSN_DOWNSTREAM_EN | 180 PSIHB_IRSN_UPSTREAM_EN); 181 182 /* We ignore the compare mask as well, our ICS emulation is too 183 * simplistic to make any use if it, and we extract the offset 184 * from the compare value 185 */ 186 ics->offset = (val & PSIHB_IRSN_COMP_MSK) >> PSIHB_IRSN_COMP_SH; 187 } 188 189 /* 190 * FSP and PSI interrupts are muxed under the same number. 191 */ 192 static const uint32_t xivr_regs[PSI_NUM_INTERRUPTS] = { 193 [PSIHB_IRQ_FSP] = PSIHB_XSCOM_XIVR_FSP, 194 [PSIHB_IRQ_OCC] = PSIHB_XSCOM_XIVR_OCC, 195 [PSIHB_IRQ_FSI] = PSIHB_XSCOM_XIVR_FSI, 196 [PSIHB_IRQ_LPC_I2C] = PSIHB_XSCOM_XIVR_LPCI2C, 197 [PSIHB_IRQ_LOCAL_ERR] = PSIHB_XSCOM_XIVR_LOCERR, 198 [PSIHB_IRQ_EXTERNAL] = PSIHB_XSCOM_XIVR_EXT, 199 }; 200 201 static const uint32_t stat_regs[PSI_NUM_INTERRUPTS] = { 202 [PSIHB_IRQ_FSP] = PSIHB_XSCOM_CR, 203 [PSIHB_IRQ_OCC] = PSIHB_XSCOM_IRQ_STAT, 204 [PSIHB_IRQ_FSI] = PSIHB_XSCOM_IRQ_STAT, 205 [PSIHB_IRQ_LPC_I2C] = PSIHB_XSCOM_IRQ_STAT, 206 [PSIHB_IRQ_LOCAL_ERR] = PSIHB_XSCOM_IRQ_STAT, 207 [PSIHB_IRQ_EXTERNAL] = PSIHB_XSCOM_IRQ_STAT, 208 }; 209 210 static const uint64_t stat_bits[PSI_NUM_INTERRUPTS] = { 211 [PSIHB_IRQ_FSP] = PSIHB_CR_FSP_IRQ, 212 [PSIHB_IRQ_OCC] = PSIHB_IRQ_STAT_OCC, 213 [PSIHB_IRQ_FSI] = PSIHB_IRQ_STAT_FSI, 214 [PSIHB_IRQ_LPC_I2C] = PSIHB_IRQ_STAT_LPCI2C, 215 [PSIHB_IRQ_LOCAL_ERR] = PSIHB_IRQ_STAT_LOCERR, 216 [PSIHB_IRQ_EXTERNAL] = PSIHB_IRQ_STAT_EXT, 217 }; 218 219 static void pnv_psi_power8_set_irq(void *opaque, int irq, int state) 220 { 221 PnvPsi *psi = opaque; 222 uint32_t xivr_reg; 223 uint32_t stat_reg; 224 uint32_t src; 225 bool masked; 226 227 xivr_reg = xivr_regs[irq]; 228 stat_reg = stat_regs[irq]; 229 230 src = (psi->regs[xivr_reg] & PSIHB_XIVR_SRC_MSK) >> PSIHB_XIVR_SRC_SH; 231 if (state) { 232 psi->regs[stat_reg] |= stat_bits[irq]; 233 /* TODO: optimization, check mask here. That means 234 * re-evaluating when unmasking 235 */ 236 qemu_irq_raise(psi->qirqs[src]); 237 } else { 238 psi->regs[stat_reg] &= ~stat_bits[irq]; 239 240 /* FSP and PSI are muxed so don't lower if either is still set */ 241 if (stat_reg != PSIHB_XSCOM_CR || 242 !(psi->regs[stat_reg] & (PSIHB_CR_PSI_IRQ | PSIHB_CR_FSP_IRQ))) { 243 qemu_irq_lower(psi->qirqs[src]); 244 } else { 245 state = true; 246 } 247 } 248 249 /* Note about the emulation of the pending bit: This isn't 250 * entirely correct. The pending bit should be cleared when the 251 * EOI has been received. However, we don't have callbacks on EOI 252 * (especially not under KVM) so no way to emulate that properly, 253 * so instead we just set that bit as the logical "output" of the 254 * XIVR (ie pending & !masked) 255 * 256 * CLG: We could define a new ICS object with a custom eoi() 257 * handler to clear the pending bit. But I am not sure this would 258 * be useful for the software anyhow. 259 */ 260 masked = (psi->regs[xivr_reg] & PSIHB_XIVR_PRIO_MSK) == PSIHB_XIVR_PRIO_MSK; 261 if (state && !masked) { 262 psi->regs[xivr_reg] |= PSIHB_XIVR_PENDING; 263 } else { 264 psi->regs[xivr_reg] &= ~PSIHB_XIVR_PENDING; 265 } 266 } 267 268 static void pnv_psi_set_xivr(PnvPsi *psi, uint32_t reg, uint64_t val) 269 { 270 ICSState *ics = &PNV8_PSI(psi)->ics; 271 uint16_t server; 272 uint8_t prio; 273 uint8_t src; 274 275 psi->regs[reg] = (psi->regs[reg] & PSIHB_XIVR_PENDING) | 276 (val & (PSIHB_XIVR_SERVER_MSK | 277 PSIHB_XIVR_PRIO_MSK | 278 PSIHB_XIVR_SRC_MSK)); 279 val = psi->regs[reg]; 280 server = (val & PSIHB_XIVR_SERVER_MSK) >> PSIHB_XIVR_SERVER_SH; 281 prio = (val & PSIHB_XIVR_PRIO_MSK) >> PSIHB_XIVR_PRIO_SH; 282 src = (val & PSIHB_XIVR_SRC_MSK) >> PSIHB_XIVR_SRC_SH; 283 284 if (src >= PSI_NUM_INTERRUPTS) { 285 qemu_log_mask(LOG_GUEST_ERROR, "PSI: Unsupported irq %d\n", src); 286 return; 287 } 288 289 /* Remove pending bit if the IRQ is masked */ 290 if ((psi->regs[reg] & PSIHB_XIVR_PRIO_MSK) == PSIHB_XIVR_PRIO_MSK) { 291 psi->regs[reg] &= ~PSIHB_XIVR_PENDING; 292 } 293 294 /* The low order 2 bits are the link pointer (Type II interrupts). 295 * Shift back to get a valid IRQ server. 296 */ 297 server >>= 2; 298 299 /* Now because of source remapping, weird things can happen 300 * if you change the source number dynamically, our simple ICS 301 * doesn't deal with remapping. So we just poke a different 302 * ICS entry based on what source number was written. This will 303 * do for now but a more accurate implementation would instead 304 * use a fixed server/prio and a remapper of the generated irq. 305 */ 306 ics_write_xive(ics, src, server, prio, prio); 307 } 308 309 static uint64_t pnv_psi_reg_read(PnvPsi *psi, uint32_t offset, bool mmio) 310 { 311 uint64_t val = 0xffffffffffffffffull; 312 313 switch (offset) { 314 case PSIHB_XSCOM_FIR_RW: 315 case PSIHB_XSCOM_FIRACT0: 316 case PSIHB_XSCOM_FIRACT1: 317 case PSIHB_XSCOM_BAR: 318 case PSIHB_XSCOM_FSPBAR: 319 case PSIHB_XSCOM_CR: 320 case PSIHB_XSCOM_XIVR_FSP: 321 case PSIHB_XSCOM_XIVR_OCC: 322 case PSIHB_XSCOM_XIVR_FSI: 323 case PSIHB_XSCOM_XIVR_LPCI2C: 324 case PSIHB_XSCOM_XIVR_LOCERR: 325 case PSIHB_XSCOM_XIVR_EXT: 326 case PSIHB_XSCOM_IRQ_STAT: 327 case PSIHB_XSCOM_SEMR: 328 case PSIHB_XSCOM_DMA_UPADD: 329 case PSIHB_XSCOM_IRSN: 330 val = psi->regs[offset]; 331 break; 332 default: 333 qemu_log_mask(LOG_UNIMP, "PSI: read at 0x%" PRIx32 "\n", offset); 334 } 335 return val; 336 } 337 338 static void pnv_psi_reg_write(PnvPsi *psi, uint32_t offset, uint64_t val, 339 bool mmio) 340 { 341 switch (offset) { 342 case PSIHB_XSCOM_FIR_RW: 343 case PSIHB_XSCOM_FIRACT0: 344 case PSIHB_XSCOM_FIRACT1: 345 case PSIHB_XSCOM_SEMR: 346 case PSIHB_XSCOM_DMA_UPADD: 347 psi->regs[offset] = val; 348 break; 349 case PSIHB_XSCOM_FIR_OR: 350 psi->regs[PSIHB_XSCOM_FIR_RW] |= val; 351 break; 352 case PSIHB_XSCOM_FIR_AND: 353 psi->regs[PSIHB_XSCOM_FIR_RW] &= val; 354 break; 355 case PSIHB_XSCOM_BAR: 356 /* Only XSCOM can write this one */ 357 if (!mmio) { 358 pnv_psi_set_bar(psi, val); 359 } else { 360 qemu_log_mask(LOG_GUEST_ERROR, "PSI: invalid write of BAR\n"); 361 } 362 break; 363 case PSIHB_XSCOM_FSPBAR: 364 psi->regs[PSIHB_XSCOM_FSPBAR] = val & PSIHB_FSPBAR_MASK; 365 pnv_psi_update_fsp_mr(psi); 366 break; 367 case PSIHB_XSCOM_CR: 368 pnv_psi_set_cr(psi, val); 369 break; 370 case PSIHB_XSCOM_SCR: 371 pnv_psi_set_cr(psi, psi->regs[PSIHB_XSCOM_CR] | val); 372 break; 373 case PSIHB_XSCOM_CCR: 374 pnv_psi_set_cr(psi, psi->regs[PSIHB_XSCOM_CR] & ~val); 375 break; 376 case PSIHB_XSCOM_XIVR_FSP: 377 case PSIHB_XSCOM_XIVR_OCC: 378 case PSIHB_XSCOM_XIVR_FSI: 379 case PSIHB_XSCOM_XIVR_LPCI2C: 380 case PSIHB_XSCOM_XIVR_LOCERR: 381 case PSIHB_XSCOM_XIVR_EXT: 382 pnv_psi_set_xivr(psi, offset, val); 383 break; 384 case PSIHB_XSCOM_IRQ_STAT: 385 /* Read only */ 386 qemu_log_mask(LOG_GUEST_ERROR, "PSI: invalid write of IRQ_STAT\n"); 387 break; 388 case PSIHB_XSCOM_IRSN: 389 pnv_psi_set_irsn(psi, val); 390 break; 391 default: 392 qemu_log_mask(LOG_UNIMP, "PSI: write at 0x%" PRIx32 "\n", offset); 393 } 394 } 395 396 /* 397 * The values of the registers when accessed through the MMIO region 398 * follow the relation : xscom = (mmio + 0x50) >> 3 399 */ 400 static uint64_t pnv_psi_mmio_read(void *opaque, hwaddr addr, unsigned size) 401 { 402 return pnv_psi_reg_read(opaque, PSIHB_REG(addr), true); 403 } 404 405 static void pnv_psi_mmio_write(void *opaque, hwaddr addr, 406 uint64_t val, unsigned size) 407 { 408 pnv_psi_reg_write(opaque, PSIHB_REG(addr), val, true); 409 } 410 411 static const MemoryRegionOps psi_mmio_ops = { 412 .read = pnv_psi_mmio_read, 413 .write = pnv_psi_mmio_write, 414 .endianness = DEVICE_BIG_ENDIAN, 415 .valid = { 416 .min_access_size = 8, 417 .max_access_size = 8, 418 }, 419 .impl = { 420 .min_access_size = 8, 421 .max_access_size = 8, 422 }, 423 }; 424 425 static uint64_t pnv_psi_xscom_read(void *opaque, hwaddr addr, unsigned size) 426 { 427 return pnv_psi_reg_read(opaque, addr >> 3, false); 428 } 429 430 static void pnv_psi_xscom_write(void *opaque, hwaddr addr, 431 uint64_t val, unsigned size) 432 { 433 pnv_psi_reg_write(opaque, addr >> 3, val, false); 434 } 435 436 static const MemoryRegionOps pnv_psi_xscom_ops = { 437 .read = pnv_psi_xscom_read, 438 .write = pnv_psi_xscom_write, 439 .endianness = DEVICE_BIG_ENDIAN, 440 .valid = { 441 .min_access_size = 8, 442 .max_access_size = 8, 443 }, 444 .impl = { 445 .min_access_size = 8, 446 .max_access_size = 8, 447 } 448 }; 449 450 static void pnv_psi_reset(DeviceState *dev) 451 { 452 PnvPsi *psi = PNV_PSI(dev); 453 454 memset(psi->regs, 0x0, sizeof(psi->regs)); 455 456 psi->regs[PSIHB_XSCOM_BAR] = psi->bar | PSIHB_BAR_EN; 457 } 458 459 static void pnv_psi_reset_handler(void *dev) 460 { 461 device_cold_reset(DEVICE(dev)); 462 } 463 464 static void pnv_psi_realize(DeviceState *dev, Error **errp) 465 { 466 PnvPsi *psi = PNV_PSI(dev); 467 468 /* Default BAR for MMIO region */ 469 pnv_psi_set_bar(psi, psi->bar | PSIHB_BAR_EN); 470 471 qemu_register_reset(pnv_psi_reset_handler, dev); 472 } 473 474 static void pnv_psi_power8_instance_init(Object *obj) 475 { 476 Pnv8Psi *psi8 = PNV8_PSI(obj); 477 478 object_initialize_child(obj, "ics-psi", &psi8->ics, TYPE_ICS); 479 object_property_add_alias(obj, ICS_PROP_XICS, OBJECT(&psi8->ics), 480 ICS_PROP_XICS); 481 } 482 483 static const uint8_t irq_to_xivr[] = { 484 PSIHB_XSCOM_XIVR_FSP, 485 PSIHB_XSCOM_XIVR_OCC, 486 PSIHB_XSCOM_XIVR_FSI, 487 PSIHB_XSCOM_XIVR_LPCI2C, 488 PSIHB_XSCOM_XIVR_LOCERR, 489 PSIHB_XSCOM_XIVR_EXT, 490 }; 491 492 static void pnv_psi_power8_realize(DeviceState *dev, Error **errp) 493 { 494 PnvPsi *psi = PNV_PSI(dev); 495 ICSState *ics = &PNV8_PSI(psi)->ics; 496 unsigned int i; 497 498 /* Create PSI interrupt control source */ 499 if (!object_property_set_int(OBJECT(ics), "nr-irqs", PSI_NUM_INTERRUPTS, 500 errp)) { 501 return; 502 } 503 if (!qdev_realize(DEVICE(ics), NULL, errp)) { 504 return; 505 } 506 507 for (i = 0; i < ics->nr_irqs; i++) { 508 ics_set_irq_type(ics, i, true); 509 } 510 511 qdev_init_gpio_in(dev, pnv_psi_power8_set_irq, ics->nr_irqs); 512 513 psi->qirqs = qemu_allocate_irqs(ics_set_irq, ics, ics->nr_irqs); 514 515 /* XSCOM region for PSI registers */ 516 pnv_xscom_region_init(&psi->xscom_regs, OBJECT(dev), &pnv_psi_xscom_ops, 517 psi, "xscom-psi", PNV_XSCOM_PSIHB_SIZE); 518 519 /* Initialize MMIO region */ 520 memory_region_init_io(&psi->regs_mr, OBJECT(dev), &psi_mmio_ops, psi, 521 "psihb", PNV_PSIHB_SIZE); 522 523 /* Default sources in XIVR */ 524 for (i = 0; i < PSI_NUM_INTERRUPTS; i++) { 525 uint8_t xivr = irq_to_xivr[i]; 526 psi->regs[xivr] = PSIHB_XIVR_PRIO_MSK | 527 ((uint64_t) i << PSIHB_XIVR_SRC_SH); 528 } 529 530 pnv_psi_realize(dev, errp); 531 } 532 533 static int pnv_psi_dt_xscom(PnvXScomInterface *dev, void *fdt, int xscom_offset) 534 { 535 PnvPsiClass *ppc = PNV_PSI_GET_CLASS(dev); 536 char *name; 537 int offset; 538 uint32_t reg[] = { 539 cpu_to_be32(ppc->xscom_pcba), 540 cpu_to_be32(ppc->xscom_size) 541 }; 542 543 name = g_strdup_printf("psihb@%x", ppc->xscom_pcba); 544 offset = fdt_add_subnode(fdt, xscom_offset, name); 545 _FDT(offset); 546 g_free(name); 547 548 _FDT(fdt_setprop(fdt, offset, "reg", reg, sizeof(reg))); 549 _FDT(fdt_setprop_cell(fdt, offset, "#address-cells", 2)); 550 _FDT(fdt_setprop_cell(fdt, offset, "#size-cells", 1)); 551 _FDT(fdt_setprop(fdt, offset, "compatible", ppc->compat, 552 ppc->compat_size)); 553 return 0; 554 } 555 556 static Property pnv_psi_properties[] = { 557 DEFINE_PROP_UINT64("bar", PnvPsi, bar, 0), 558 DEFINE_PROP_UINT64("fsp-bar", PnvPsi, fsp_bar, 0), 559 DEFINE_PROP_END_OF_LIST(), 560 }; 561 562 static void pnv_psi_power8_class_init(ObjectClass *klass, void *data) 563 { 564 DeviceClass *dc = DEVICE_CLASS(klass); 565 PnvPsiClass *ppc = PNV_PSI_CLASS(klass); 566 static const char compat[] = "ibm,power8-psihb-x\0ibm,psihb-x"; 567 568 dc->desc = "PowerNV PSI Controller POWER8"; 569 dc->realize = pnv_psi_power8_realize; 570 571 ppc->xscom_pcba = PNV_XSCOM_PSIHB_BASE; 572 ppc->xscom_size = PNV_XSCOM_PSIHB_SIZE; 573 ppc->bar_mask = PSIHB_BAR_MASK; 574 ppc->compat = compat; 575 ppc->compat_size = sizeof(compat); 576 } 577 578 static const TypeInfo pnv_psi_power8_info = { 579 .name = TYPE_PNV8_PSI, 580 .parent = TYPE_PNV_PSI, 581 .instance_size = sizeof(Pnv8Psi), 582 .instance_init = pnv_psi_power8_instance_init, 583 .class_init = pnv_psi_power8_class_init, 584 }; 585 586 587 /* Common registers */ 588 589 #define PSIHB9_CR 0x20 590 #define PSIHB9_SEMR 0x28 591 592 /* P9 registers */ 593 594 #define PSIHB9_INTERRUPT_CONTROL 0x58 595 #define PSIHB9_IRQ_METHOD PPC_BIT(0) 596 #define PSIHB9_IRQ_RESET PPC_BIT(1) 597 #define PSIHB9_ESB_CI_BASE 0x60 598 #define PSIHB9_ESB_CI_ADDR_MASK PPC_BITMASK(8, 47) 599 #define PSIHB9_ESB_CI_VALID PPC_BIT(63) 600 #define PSIHB9_ESB_NOTIF_ADDR 0x68 601 #define PSIHB9_ESB_NOTIF_ADDR_MASK PPC_BITMASK(8, 60) 602 #define PSIHB9_ESB_NOTIF_VALID PPC_BIT(63) 603 #define PSIHB9_IVT_OFFSET 0x70 604 #define PSIHB9_IVT_OFF_SHIFT 32 605 606 #define PSIHB9_IRQ_LEVEL 0x78 /* assertion */ 607 #define PSIHB9_IRQ_LEVEL_PSI PPC_BIT(0) 608 #define PSIHB9_IRQ_LEVEL_OCC PPC_BIT(1) 609 #define PSIHB9_IRQ_LEVEL_FSI PPC_BIT(2) 610 #define PSIHB9_IRQ_LEVEL_LPCHC PPC_BIT(3) 611 #define PSIHB9_IRQ_LEVEL_LOCAL_ERR PPC_BIT(4) 612 #define PSIHB9_IRQ_LEVEL_GLOBAL_ERR PPC_BIT(5) 613 #define PSIHB9_IRQ_LEVEL_TPM PPC_BIT(6) 614 #define PSIHB9_IRQ_LEVEL_LPC_SIRQ1 PPC_BIT(7) 615 #define PSIHB9_IRQ_LEVEL_LPC_SIRQ2 PPC_BIT(8) 616 #define PSIHB9_IRQ_LEVEL_LPC_SIRQ3 PPC_BIT(9) 617 #define PSIHB9_IRQ_LEVEL_LPC_SIRQ4 PPC_BIT(10) 618 #define PSIHB9_IRQ_LEVEL_SBE_I2C PPC_BIT(11) 619 #define PSIHB9_IRQ_LEVEL_DIO PPC_BIT(12) 620 #define PSIHB9_IRQ_LEVEL_PSU PPC_BIT(13) 621 #define PSIHB9_IRQ_LEVEL_I2C_C PPC_BIT(14) 622 #define PSIHB9_IRQ_LEVEL_I2C_D PPC_BIT(15) 623 #define PSIHB9_IRQ_LEVEL_I2C_E PPC_BIT(16) 624 #define PSIHB9_IRQ_LEVEL_SBE PPC_BIT(19) 625 626 #define PSIHB9_IRQ_STAT 0x80 /* P bit */ 627 #define PSIHB9_IRQ_STAT_PSI PPC_BIT(0) 628 #define PSIHB9_IRQ_STAT_OCC PPC_BIT(1) 629 #define PSIHB9_IRQ_STAT_FSI PPC_BIT(2) 630 #define PSIHB9_IRQ_STAT_LPCHC PPC_BIT(3) 631 #define PSIHB9_IRQ_STAT_LOCAL_ERR PPC_BIT(4) 632 #define PSIHB9_IRQ_STAT_GLOBAL_ERR PPC_BIT(5) 633 #define PSIHB9_IRQ_STAT_TPM PPC_BIT(6) 634 #define PSIHB9_IRQ_STAT_LPC_SIRQ1 PPC_BIT(7) 635 #define PSIHB9_IRQ_STAT_LPC_SIRQ2 PPC_BIT(8) 636 #define PSIHB9_IRQ_STAT_LPC_SIRQ3 PPC_BIT(9) 637 #define PSIHB9_IRQ_STAT_LPC_SIRQ4 PPC_BIT(10) 638 #define PSIHB9_IRQ_STAT_SBE_I2C PPC_BIT(11) 639 #define PSIHB9_IRQ_STAT_DIO PPC_BIT(12) 640 #define PSIHB9_IRQ_STAT_PSU PPC_BIT(13) 641 642 /* P10 register extensions */ 643 644 #define PSIHB10_CR PSIHB9_CR 645 #define PSIHB10_CR_STORE_EOI PPC_BIT(12) 646 647 #define PSIHB10_ESB_CI_BASE PSIHB9_ESB_CI_BASE 648 #define PSIHB10_ESB_CI_64K PPC_BIT(1) 649 650 static void pnv_psi_notify(XiveNotifier *xf, uint32_t srcno, bool pq_checked) 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 = offset | srcno; 660 MemTxResult result; 661 662 if (pq_checked) { 663 data |= XIVE_TRIGGER_PQ; 664 } 665 666 if (!valid) { 667 return; 668 } 669 670 address_space_stq_be(&address_space_memory, notify_addr, data, 671 MEMTXATTRS_UNSPECIFIED, &result); 672 if (result != MEMTX_OK) { 673 qemu_log_mask(LOG_GUEST_ERROR, "%s: trigger failed @%" 674 HWADDR_PRIx "\n", __func__, notif_port); 675 return; 676 } 677 } 678 679 static uint64_t pnv_psi_p9_mmio_read(void *opaque, hwaddr addr, unsigned size) 680 { 681 PnvPsi *psi = PNV_PSI(opaque); 682 uint32_t reg = PSIHB_REG(addr); 683 uint64_t val = -1; 684 685 switch (addr) { 686 case PSIHB9_CR: 687 case PSIHB9_SEMR: 688 /* FSP stuff */ 689 case PSIHB9_INTERRUPT_CONTROL: 690 case PSIHB9_ESB_CI_BASE: 691 case PSIHB9_ESB_NOTIF_ADDR: 692 case PSIHB9_IVT_OFFSET: 693 val = psi->regs[reg]; 694 break; 695 default: 696 qemu_log_mask(LOG_GUEST_ERROR, "PSI: read at 0x%" PRIx64 "\n", addr); 697 } 698 699 return val; 700 } 701 702 static void pnv_psi_p9_mmio_write(void *opaque, hwaddr addr, 703 uint64_t val, unsigned size) 704 { 705 PnvPsi *psi = PNV_PSI(opaque); 706 Pnv9Psi *psi9 = PNV9_PSI(psi); 707 uint32_t reg = PSIHB_REG(addr); 708 MemoryRegion *sysmem = get_system_memory(); 709 710 switch (addr) { 711 case PSIHB9_CR: 712 if (val & PSIHB10_CR_STORE_EOI) { 713 psi9->source.esb_flags |= XIVE_SRC_STORE_EOI; 714 } else { 715 psi9->source.esb_flags &= ~XIVE_SRC_STORE_EOI; 716 } 717 break; 718 719 case PSIHB9_SEMR: 720 /* FSP stuff */ 721 break; 722 case PSIHB9_INTERRUPT_CONTROL: 723 if (val & PSIHB9_IRQ_RESET) { 724 device_cold_reset(DEVICE(&psi9->source)); 725 } 726 psi->regs[reg] = val; 727 break; 728 729 case PSIHB9_ESB_CI_BASE: 730 if (val & PSIHB10_ESB_CI_64K) { 731 psi9->source.esb_shift = XIVE_ESB_64K; 732 } else { 733 psi9->source.esb_shift = XIVE_ESB_4K; 734 } 735 if (!(val & PSIHB9_ESB_CI_VALID)) { 736 if (psi->regs[reg] & PSIHB9_ESB_CI_VALID) { 737 memory_region_del_subregion(sysmem, &psi9->source.esb_mmio); 738 } 739 } else { 740 if (!(psi->regs[reg] & PSIHB9_ESB_CI_VALID)) { 741 hwaddr esb_addr = 742 val & ~(PSIHB9_ESB_CI_VALID | PSIHB10_ESB_CI_64K); 743 memory_region_add_subregion(sysmem, esb_addr, 744 &psi9->source.esb_mmio); 745 } 746 } 747 psi->regs[reg] = val; 748 break; 749 750 case PSIHB9_ESB_NOTIF_ADDR: 751 psi->regs[reg] = val; 752 break; 753 case PSIHB9_IVT_OFFSET: 754 psi->regs[reg] = val; 755 break; 756 default: 757 qemu_log_mask(LOG_GUEST_ERROR, "PSI: write at 0x%" PRIx64 "\n", addr); 758 } 759 } 760 761 static const MemoryRegionOps pnv_psi_p9_mmio_ops = { 762 .read = pnv_psi_p9_mmio_read, 763 .write = pnv_psi_p9_mmio_write, 764 .endianness = DEVICE_BIG_ENDIAN, 765 .valid = { 766 .min_access_size = 8, 767 .max_access_size = 8, 768 }, 769 .impl = { 770 .min_access_size = 8, 771 .max_access_size = 8, 772 }, 773 }; 774 775 static uint64_t pnv_psi_p9_xscom_read(void *opaque, hwaddr addr, unsigned size) 776 { 777 uint32_t reg = addr >> 3; 778 uint64_t val = -1; 779 780 if (reg < PSIHB_XSCOM_BAR) { 781 /* FIR, not modeled */ 782 qemu_log_mask(LOG_UNIMP, "PSI: xscom read at 0x%08x\n", reg); 783 } else { 784 val = pnv_psi_p9_mmio_read(opaque, PSIHB_MMIO(reg), size); 785 } 786 return val; 787 } 788 789 static void pnv_psi_p9_xscom_write(void *opaque, hwaddr addr, 790 uint64_t val, unsigned size) 791 { 792 PnvPsi *psi = PNV_PSI(opaque); 793 uint32_t reg = addr >> 3; 794 795 if (reg < PSIHB_XSCOM_BAR) { 796 /* FIR, not modeled */ 797 qemu_log_mask(LOG_UNIMP, "PSI: xscom write at 0x%08x\n", reg); 798 } else if (reg == PSIHB_XSCOM_BAR) { 799 pnv_psi_set_bar(psi, val); 800 } else { 801 pnv_psi_p9_mmio_write(opaque, PSIHB_MMIO(reg), val, size); 802 } 803 } 804 805 static const MemoryRegionOps pnv_psi_p9_xscom_ops = { 806 .read = pnv_psi_p9_xscom_read, 807 .write = pnv_psi_p9_xscom_write, 808 .endianness = DEVICE_BIG_ENDIAN, 809 .valid = { 810 .min_access_size = 8, 811 .max_access_size = 8, 812 }, 813 .impl = { 814 .min_access_size = 8, 815 .max_access_size = 8, 816 } 817 }; 818 819 static void pnv_psi_power9_set_irq(void *opaque, int irq, int state) 820 { 821 PnvPsi *psi = opaque; 822 uint64_t irq_method = psi->regs[PSIHB_REG(PSIHB9_INTERRUPT_CONTROL)]; 823 824 if (irq_method & PSIHB9_IRQ_METHOD) { 825 qemu_log_mask(LOG_GUEST_ERROR, "PSI: LSI IRQ method no supported\n"); 826 return; 827 } 828 829 /* Update LSI levels */ 830 if (state) { 831 psi->regs[PSIHB_REG(PSIHB9_IRQ_LEVEL)] |= PPC_BIT(irq); 832 } else { 833 psi->regs[PSIHB_REG(PSIHB9_IRQ_LEVEL)] &= ~PPC_BIT(irq); 834 } 835 836 qemu_set_irq(psi->qirqs[irq], state); 837 } 838 839 static void pnv_psi_power9_reset(DeviceState *dev) 840 { 841 Pnv9Psi *psi = PNV9_PSI(dev); 842 843 pnv_psi_reset(dev); 844 845 if (memory_region_is_mapped(&psi->source.esb_mmio)) { 846 memory_region_del_subregion(get_system_memory(), &psi->source.esb_mmio); 847 } 848 } 849 850 static void pnv_psi_power9_instance_init(Object *obj) 851 { 852 Pnv9Psi *psi = PNV9_PSI(obj); 853 854 object_initialize_child(obj, "source", &psi->source, TYPE_XIVE_SOURCE); 855 object_property_add_alias(obj, "shift", OBJECT(&psi->source), "shift"); 856 } 857 858 static void pnv_psi_power9_realize(DeviceState *dev, Error **errp) 859 { 860 PnvPsi *psi = PNV_PSI(dev); 861 XiveSource *xsrc = &PNV9_PSI(psi)->source; 862 int i; 863 864 object_property_set_int(OBJECT(xsrc), "nr-irqs", PSIHB9_NUM_IRQS, 865 &error_fatal); 866 object_property_set_link(OBJECT(xsrc), "xive", OBJECT(psi), &error_abort); 867 object_property_set_int(OBJECT(xsrc), "reset-pq", XIVE_ESB_RESET, 868 &error_abort); 869 if (!qdev_realize(DEVICE(xsrc), NULL, errp)) { 870 return; 871 } 872 873 for (i = 0; i < xsrc->nr_irqs; i++) { 874 xive_source_irq_set_lsi(xsrc, i); 875 } 876 877 psi->qirqs = qemu_allocate_irqs(xive_source_set_irq, xsrc, xsrc->nr_irqs); 878 879 qdev_init_gpio_in(dev, pnv_psi_power9_set_irq, xsrc->nr_irqs); 880 881 /* XSCOM region for PSI registers */ 882 pnv_xscom_region_init(&psi->xscom_regs, OBJECT(dev), &pnv_psi_p9_xscom_ops, 883 psi, "xscom-psi", PNV9_XSCOM_PSIHB_SIZE); 884 885 /* MMIO region for PSI registers */ 886 memory_region_init_io(&psi->regs_mr, OBJECT(dev), &pnv_psi_p9_mmio_ops, psi, 887 "psihb", PNV9_PSIHB_SIZE); 888 889 pnv_psi_realize(dev, errp); 890 } 891 892 static void pnv_psi_power9_class_init(ObjectClass *klass, void *data) 893 { 894 DeviceClass *dc = DEVICE_CLASS(klass); 895 PnvPsiClass *ppc = PNV_PSI_CLASS(klass); 896 XiveNotifierClass *xfc = XIVE_NOTIFIER_CLASS(klass); 897 static const char compat[] = "ibm,power9-psihb-x\0ibm,psihb-x"; 898 899 dc->desc = "PowerNV PSI Controller POWER9"; 900 dc->realize = pnv_psi_power9_realize; 901 dc->reset = pnv_psi_power9_reset; 902 903 ppc->xscom_pcba = PNV9_XSCOM_PSIHB_BASE; 904 ppc->xscom_size = PNV9_XSCOM_PSIHB_SIZE; 905 ppc->bar_mask = PSIHB9_BAR_MASK; 906 ppc->compat = compat; 907 ppc->compat_size = sizeof(compat); 908 909 xfc->notify = pnv_psi_notify; 910 } 911 912 static const TypeInfo pnv_psi_power9_info = { 913 .name = TYPE_PNV9_PSI, 914 .parent = TYPE_PNV_PSI, 915 .instance_size = sizeof(Pnv9Psi), 916 .instance_init = pnv_psi_power9_instance_init, 917 .class_init = pnv_psi_power9_class_init, 918 .interfaces = (InterfaceInfo[]) { 919 { TYPE_XIVE_NOTIFIER }, 920 { }, 921 }, 922 }; 923 924 static void pnv_psi_power10_class_init(ObjectClass *klass, void *data) 925 { 926 DeviceClass *dc = DEVICE_CLASS(klass); 927 PnvPsiClass *ppc = PNV_PSI_CLASS(klass); 928 static const char compat[] = "ibm,power10-psihb-x\0ibm,psihb-x"; 929 930 dc->desc = "PowerNV PSI Controller POWER10"; 931 932 ppc->xscom_pcba = PNV10_XSCOM_PSIHB_BASE; 933 ppc->xscom_size = PNV10_XSCOM_PSIHB_SIZE; 934 ppc->compat = compat; 935 ppc->compat_size = sizeof(compat); 936 } 937 938 static const TypeInfo pnv_psi_power10_info = { 939 .name = TYPE_PNV10_PSI, 940 .parent = TYPE_PNV9_PSI, 941 .class_init = pnv_psi_power10_class_init, 942 }; 943 944 static void pnv_psi_class_init(ObjectClass *klass, void *data) 945 { 946 DeviceClass *dc = DEVICE_CLASS(klass); 947 PnvXScomInterfaceClass *xdc = PNV_XSCOM_INTERFACE_CLASS(klass); 948 949 xdc->dt_xscom = pnv_psi_dt_xscom; 950 951 dc->desc = "PowerNV PSI Controller"; 952 device_class_set_props(dc, pnv_psi_properties); 953 dc->reset = pnv_psi_reset; 954 dc->user_creatable = false; 955 } 956 957 static const TypeInfo pnv_psi_info = { 958 .name = TYPE_PNV_PSI, 959 .parent = TYPE_DEVICE, 960 .instance_size = sizeof(PnvPsi), 961 .class_init = pnv_psi_class_init, 962 .class_size = sizeof(PnvPsiClass), 963 .abstract = true, 964 .interfaces = (InterfaceInfo[]) { 965 { TYPE_PNV_XSCOM_INTERFACE }, 966 { } 967 } 968 }; 969 970 static void pnv_psi_register_types(void) 971 { 972 type_register_static(&pnv_psi_info); 973 type_register_static(&pnv_psi_power8_info); 974 type_register_static(&pnv_psi_power9_info); 975 type_register_static(&pnv_psi_power10_info); 976 } 977 978 type_init(pnv_psi_register_types); 979 980 void pnv_psi_pic_print_info(Pnv9Psi *psi9, Monitor *mon) 981 { 982 PnvPsi *psi = PNV_PSI(psi9); 983 984 uint32_t offset = 985 (psi->regs[PSIHB_REG(PSIHB9_IVT_OFFSET)] >> PSIHB9_IVT_OFF_SHIFT); 986 987 monitor_printf(mon, "PSIHB Source %08x .. %08x\n", 988 offset, offset + psi9->source.nr_irqs - 1); 989 xive_source_pic_print_info(&psi9->source, offset, mon); 990 } 991