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/ppc/pnv_psi.h" 35 36 #include <libfdt.h> 37 38 #define PSIHB_XSCOM_FIR_RW 0x00 39 #define PSIHB_XSCOM_FIR_AND 0x01 40 #define PSIHB_XSCOM_FIR_OR 0x02 41 #define PSIHB_XSCOM_FIRMASK_RW 0x03 42 #define PSIHB_XSCOM_FIRMASK_AND 0x04 43 #define PSIHB_XSCOM_FIRMASK_OR 0x05 44 #define PSIHB_XSCOM_FIRACT0 0x06 45 #define PSIHB_XSCOM_FIRACT1 0x07 46 47 /* Host Bridge Base Address Register */ 48 #define PSIHB_XSCOM_BAR 0x0a 49 #define PSIHB_BAR_EN 0x0000000000000001ull 50 51 /* FSP Base Address Register */ 52 #define PSIHB_XSCOM_FSPBAR 0x0b 53 54 /* PSI Host Bridge Control/Status Register */ 55 #define PSIHB_XSCOM_CR 0x0e 56 #define PSIHB_CR_FSP_CMD_ENABLE 0x8000000000000000ull 57 #define PSIHB_CR_FSP_MMIO_ENABLE 0x4000000000000000ull 58 #define PSIHB_CR_FSP_IRQ_ENABLE 0x1000000000000000ull 59 #define PSIHB_CR_FSP_ERR_RSP_ENABLE 0x0800000000000000ull 60 #define PSIHB_CR_PSI_LINK_ENABLE 0x0400000000000000ull 61 #define PSIHB_CR_FSP_RESET 0x0200000000000000ull 62 #define PSIHB_CR_PSIHB_RESET 0x0100000000000000ull 63 #define PSIHB_CR_PSI_IRQ 0x0000800000000000ull 64 #define PSIHB_CR_FSP_IRQ 0x0000400000000000ull 65 #define PSIHB_CR_FSP_LINK_ACTIVE 0x0000200000000000ull 66 #define PSIHB_CR_IRQ_CMD_EXPECT 0x0000010000000000ull 67 /* and more ... */ 68 69 /* PSIHB Status / Error Mask Register */ 70 #define PSIHB_XSCOM_SEMR 0x0f 71 72 /* XIVR, to signal interrupts to the CEC firmware. more XIVR below. */ 73 #define PSIHB_XSCOM_XIVR_FSP 0x10 74 #define PSIHB_XIVR_SERVER_SH 40 75 #define PSIHB_XIVR_SERVER_MSK (0xffffull << PSIHB_XIVR_SERVER_SH) 76 #define PSIHB_XIVR_PRIO_SH 32 77 #define PSIHB_XIVR_PRIO_MSK (0xffull << PSIHB_XIVR_PRIO_SH) 78 #define PSIHB_XIVR_SRC_SH 29 79 #define PSIHB_XIVR_SRC_MSK (0x7ull << PSIHB_XIVR_SRC_SH) 80 #define PSIHB_XIVR_PENDING 0x01000000ull 81 82 /* PSI Host Bridge Set Control/ Status Register */ 83 #define PSIHB_XSCOM_SCR 0x12 84 85 /* PSI Host Bridge Clear Control/ Status Register */ 86 #define PSIHB_XSCOM_CCR 0x13 87 88 /* DMA Upper Address Register */ 89 #define PSIHB_XSCOM_DMA_UPADD 0x14 90 91 /* Interrupt Status */ 92 #define PSIHB_XSCOM_IRQ_STAT 0x15 93 #define PSIHB_IRQ_STAT_OCC 0x0000001000000000ull 94 #define PSIHB_IRQ_STAT_FSI 0x0000000800000000ull 95 #define PSIHB_IRQ_STAT_LPCI2C 0x0000000400000000ull 96 #define PSIHB_IRQ_STAT_LOCERR 0x0000000200000000ull 97 #define PSIHB_IRQ_STAT_EXT 0x0000000100000000ull 98 99 /* remaining XIVR */ 100 #define PSIHB_XSCOM_XIVR_OCC 0x16 101 #define PSIHB_XSCOM_XIVR_FSI 0x17 102 #define PSIHB_XSCOM_XIVR_LPCI2C 0x18 103 #define PSIHB_XSCOM_XIVR_LOCERR 0x19 104 #define PSIHB_XSCOM_XIVR_EXT 0x1a 105 106 /* Interrupt Requester Source Compare Register */ 107 #define PSIHB_XSCOM_IRSN 0x1b 108 #define PSIHB_IRSN_COMP_SH 45 109 #define PSIHB_IRSN_COMP_MSK (0x7ffffull << PSIHB_IRSN_COMP_SH) 110 #define PSIHB_IRSN_IRQ_MUX 0x0000000800000000ull 111 #define PSIHB_IRSN_IRQ_RESET 0x0000000400000000ull 112 #define PSIHB_IRSN_DOWNSTREAM_EN 0x0000000200000000ull 113 #define PSIHB_IRSN_UPSTREAM_EN 0x0000000100000000ull 114 #define PSIHB_IRSN_COMPMASK_SH 13 115 #define PSIHB_IRSN_COMPMASK_MSK (0x7ffffull << PSIHB_IRSN_COMPMASK_SH) 116 117 #define PSIHB_BAR_MASK 0x0003fffffff00000ull 118 #define PSIHB_FSPBAR_MASK 0x0003ffff00000000ull 119 120 #define PSIHB9_BAR_MASK 0x00fffffffff00000ull 121 #define PSIHB9_FSPBAR_MASK 0x00ffffff00000000ull 122 123 #define PSIHB_REG(addr) (((addr) >> 3) + PSIHB_XSCOM_BAR) 124 125 static void pnv_psi_set_bar(PnvPsi *psi, uint64_t bar) 126 { 127 PnvPsiClass *ppc = PNV_PSI_GET_CLASS(psi); 128 MemoryRegion *sysmem = get_system_memory(); 129 uint64_t old = psi->regs[PSIHB_XSCOM_BAR]; 130 131 psi->regs[PSIHB_XSCOM_BAR] = bar & (ppc->bar_mask | PSIHB_BAR_EN); 132 133 /* Update MR, always remove it first */ 134 if (old & PSIHB_BAR_EN) { 135 memory_region_del_subregion(sysmem, &psi->regs_mr); 136 } 137 138 /* Then add it back if needed */ 139 if (bar & PSIHB_BAR_EN) { 140 uint64_t addr = bar & ppc->bar_mask; 141 memory_region_add_subregion(sysmem, addr, &psi->regs_mr); 142 } 143 } 144 145 static void pnv_psi_update_fsp_mr(PnvPsi *psi) 146 { 147 /* TODO: Update FSP MR if/when we support FSP BAR */ 148 } 149 150 static void pnv_psi_set_cr(PnvPsi *psi, uint64_t cr) 151 { 152 uint64_t old = psi->regs[PSIHB_XSCOM_CR]; 153 154 psi->regs[PSIHB_XSCOM_CR] = cr; 155 156 /* Check some bit changes */ 157 if ((old ^ psi->regs[PSIHB_XSCOM_CR]) & PSIHB_CR_FSP_MMIO_ENABLE) { 158 pnv_psi_update_fsp_mr(psi); 159 } 160 } 161 162 static void pnv_psi_set_irsn(PnvPsi *psi, uint64_t val) 163 { 164 ICSState *ics = &PNV8_PSI(psi)->ics; 165 166 /* In this model we ignore the up/down enable bits for now 167 * as SW doesn't use them (other than setting them at boot). 168 * We ignore IRQ_MUX, its meaning isn't clear and we don't use 169 * it and finally we ignore reset (XXX fix that ?) 170 */ 171 psi->regs[PSIHB_XSCOM_IRSN] = val & (PSIHB_IRSN_COMP_MSK | 172 PSIHB_IRSN_IRQ_MUX | 173 PSIHB_IRSN_IRQ_RESET | 174 PSIHB_IRSN_DOWNSTREAM_EN | 175 PSIHB_IRSN_UPSTREAM_EN); 176 177 /* We ignore the compare mask as well, our ICS emulation is too 178 * simplistic to make any use if it, and we extract the offset 179 * from the compare value 180 */ 181 ics->offset = (val & PSIHB_IRSN_COMP_MSK) >> PSIHB_IRSN_COMP_SH; 182 } 183 184 /* 185 * FSP and PSI interrupts are muxed under the same number. 186 */ 187 static const uint32_t xivr_regs[] = { 188 [PSIHB_IRQ_PSI] = PSIHB_XSCOM_XIVR_FSP, 189 [PSIHB_IRQ_FSP] = PSIHB_XSCOM_XIVR_FSP, 190 [PSIHB_IRQ_OCC] = PSIHB_XSCOM_XIVR_OCC, 191 [PSIHB_IRQ_FSI] = PSIHB_XSCOM_XIVR_FSI, 192 [PSIHB_IRQ_LPC_I2C] = PSIHB_XSCOM_XIVR_LPCI2C, 193 [PSIHB_IRQ_LOCAL_ERR] = PSIHB_XSCOM_XIVR_LOCERR, 194 [PSIHB_IRQ_EXTERNAL] = PSIHB_XSCOM_XIVR_EXT, 195 }; 196 197 static const uint32_t stat_regs[] = { 198 [PSIHB_IRQ_PSI] = PSIHB_XSCOM_CR, 199 [PSIHB_IRQ_FSP] = PSIHB_XSCOM_CR, 200 [PSIHB_IRQ_OCC] = PSIHB_XSCOM_IRQ_STAT, 201 [PSIHB_IRQ_FSI] = PSIHB_XSCOM_IRQ_STAT, 202 [PSIHB_IRQ_LPC_I2C] = PSIHB_XSCOM_IRQ_STAT, 203 [PSIHB_IRQ_LOCAL_ERR] = PSIHB_XSCOM_IRQ_STAT, 204 [PSIHB_IRQ_EXTERNAL] = PSIHB_XSCOM_IRQ_STAT, 205 }; 206 207 static const uint64_t stat_bits[] = { 208 [PSIHB_IRQ_PSI] = PSIHB_CR_PSI_IRQ, 209 [PSIHB_IRQ_FSP] = PSIHB_CR_FSP_IRQ, 210 [PSIHB_IRQ_OCC] = PSIHB_IRQ_STAT_OCC, 211 [PSIHB_IRQ_FSI] = PSIHB_IRQ_STAT_FSI, 212 [PSIHB_IRQ_LPC_I2C] = PSIHB_IRQ_STAT_LPCI2C, 213 [PSIHB_IRQ_LOCAL_ERR] = PSIHB_IRQ_STAT_LOCERR, 214 [PSIHB_IRQ_EXTERNAL] = PSIHB_IRQ_STAT_EXT, 215 }; 216 217 void pnv_psi_irq_set(PnvPsi *psi, int irq, bool state) 218 { 219 PNV_PSI_GET_CLASS(psi)->irq_set(psi, irq, state); 220 } 221 222 static void pnv_psi_power8_irq_set(PnvPsi *psi, int irq, bool state) 223 { 224 uint32_t xivr_reg; 225 uint32_t stat_reg; 226 uint32_t src; 227 bool masked; 228 229 if (irq > PSIHB_IRQ_EXTERNAL) { 230 qemu_log_mask(LOG_GUEST_ERROR, "PSI: Unsupported irq %d\n", irq); 231 return; 232 } 233 234 xivr_reg = xivr_regs[irq]; 235 stat_reg = stat_regs[irq]; 236 237 src = (psi->regs[xivr_reg] & PSIHB_XIVR_SRC_MSK) >> PSIHB_XIVR_SRC_SH; 238 if (state) { 239 psi->regs[stat_reg] |= stat_bits[irq]; 240 /* TODO: optimization, check mask here. That means 241 * re-evaluating when unmasking 242 */ 243 qemu_irq_raise(psi->qirqs[src]); 244 } else { 245 psi->regs[stat_reg] &= ~stat_bits[irq]; 246 247 /* FSP and PSI are muxed so don't lower if either is still set */ 248 if (stat_reg != PSIHB_XSCOM_CR || 249 !(psi->regs[stat_reg] & (PSIHB_CR_PSI_IRQ | PSIHB_CR_FSP_IRQ))) { 250 qemu_irq_lower(psi->qirqs[src]); 251 } else { 252 state = true; 253 } 254 } 255 256 /* Note about the emulation of the pending bit: This isn't 257 * entirely correct. The pending bit should be cleared when the 258 * EOI has been received. However, we don't have callbacks on EOI 259 * (especially not under KVM) so no way to emulate that properly, 260 * so instead we just set that bit as the logical "output" of the 261 * XIVR (ie pending & !masked) 262 * 263 * CLG: We could define a new ICS object with a custom eoi() 264 * handler to clear the pending bit. But I am not sure this would 265 * be useful for the software anyhow. 266 */ 267 masked = (psi->regs[xivr_reg] & PSIHB_XIVR_PRIO_MSK) == PSIHB_XIVR_PRIO_MSK; 268 if (state && !masked) { 269 psi->regs[xivr_reg] |= PSIHB_XIVR_PENDING; 270 } else { 271 psi->regs[xivr_reg] &= ~PSIHB_XIVR_PENDING; 272 } 273 } 274 275 static void pnv_psi_set_xivr(PnvPsi *psi, uint32_t reg, uint64_t val) 276 { 277 ICSState *ics = &PNV8_PSI(psi)->ics; 278 uint16_t server; 279 uint8_t prio; 280 uint8_t src; 281 282 psi->regs[reg] = (psi->regs[reg] & PSIHB_XIVR_PENDING) | 283 (val & (PSIHB_XIVR_SERVER_MSK | 284 PSIHB_XIVR_PRIO_MSK | 285 PSIHB_XIVR_SRC_MSK)); 286 val = psi->regs[reg]; 287 server = (val & PSIHB_XIVR_SERVER_MSK) >> PSIHB_XIVR_SERVER_SH; 288 prio = (val & PSIHB_XIVR_PRIO_MSK) >> PSIHB_XIVR_PRIO_SH; 289 src = (val & PSIHB_XIVR_SRC_MSK) >> PSIHB_XIVR_SRC_SH; 290 291 if (src >= PSI_NUM_INTERRUPTS) { 292 qemu_log_mask(LOG_GUEST_ERROR, "PSI: Unsupported irq %d\n", src); 293 return; 294 } 295 296 /* Remove pending bit if the IRQ is masked */ 297 if ((psi->regs[reg] & PSIHB_XIVR_PRIO_MSK) == PSIHB_XIVR_PRIO_MSK) { 298 psi->regs[reg] &= ~PSIHB_XIVR_PENDING; 299 } 300 301 /* The low order 2 bits are the link pointer (Type II interrupts). 302 * Shift back to get a valid IRQ server. 303 */ 304 server >>= 2; 305 306 /* Now because of source remapping, weird things can happen 307 * if you change the source number dynamically, our simple ICS 308 * doesn't deal with remapping. So we just poke a different 309 * ICS entry based on what source number was written. This will 310 * do for now but a more accurate implementation would instead 311 * use a fixed server/prio and a remapper of the generated irq. 312 */ 313 ics_simple_write_xive(ics, src, server, prio, prio); 314 } 315 316 static uint64_t pnv_psi_reg_read(PnvPsi *psi, uint32_t offset, bool mmio) 317 { 318 uint64_t val = 0xffffffffffffffffull; 319 320 switch (offset) { 321 case PSIHB_XSCOM_FIR_RW: 322 case PSIHB_XSCOM_FIRACT0: 323 case PSIHB_XSCOM_FIRACT1: 324 case PSIHB_XSCOM_BAR: 325 case PSIHB_XSCOM_FSPBAR: 326 case PSIHB_XSCOM_CR: 327 case PSIHB_XSCOM_XIVR_FSP: 328 case PSIHB_XSCOM_XIVR_OCC: 329 case PSIHB_XSCOM_XIVR_FSI: 330 case PSIHB_XSCOM_XIVR_LPCI2C: 331 case PSIHB_XSCOM_XIVR_LOCERR: 332 case PSIHB_XSCOM_XIVR_EXT: 333 case PSIHB_XSCOM_IRQ_STAT: 334 case PSIHB_XSCOM_SEMR: 335 case PSIHB_XSCOM_DMA_UPADD: 336 case PSIHB_XSCOM_IRSN: 337 val = psi->regs[offset]; 338 break; 339 default: 340 qemu_log_mask(LOG_UNIMP, "PSI: read at 0x%" PRIx32 "\n", offset); 341 } 342 return val; 343 } 344 345 static void pnv_psi_reg_write(PnvPsi *psi, uint32_t offset, uint64_t val, 346 bool mmio) 347 { 348 switch (offset) { 349 case PSIHB_XSCOM_FIR_RW: 350 case PSIHB_XSCOM_FIRACT0: 351 case PSIHB_XSCOM_FIRACT1: 352 case PSIHB_XSCOM_SEMR: 353 case PSIHB_XSCOM_DMA_UPADD: 354 psi->regs[offset] = val; 355 break; 356 case PSIHB_XSCOM_FIR_OR: 357 psi->regs[PSIHB_XSCOM_FIR_RW] |= val; 358 break; 359 case PSIHB_XSCOM_FIR_AND: 360 psi->regs[PSIHB_XSCOM_FIR_RW] &= val; 361 break; 362 case PSIHB_XSCOM_BAR: 363 /* Only XSCOM can write this one */ 364 if (!mmio) { 365 pnv_psi_set_bar(psi, val); 366 } else { 367 qemu_log_mask(LOG_GUEST_ERROR, "PSI: invalid write of BAR\n"); 368 } 369 break; 370 case PSIHB_XSCOM_FSPBAR: 371 psi->regs[PSIHB_XSCOM_FSPBAR] = val & PSIHB_FSPBAR_MASK; 372 pnv_psi_update_fsp_mr(psi); 373 break; 374 case PSIHB_XSCOM_CR: 375 pnv_psi_set_cr(psi, val); 376 break; 377 case PSIHB_XSCOM_SCR: 378 pnv_psi_set_cr(psi, psi->regs[PSIHB_XSCOM_CR] | val); 379 break; 380 case PSIHB_XSCOM_CCR: 381 pnv_psi_set_cr(psi, psi->regs[PSIHB_XSCOM_CR] & ~val); 382 break; 383 case PSIHB_XSCOM_XIVR_FSP: 384 case PSIHB_XSCOM_XIVR_OCC: 385 case PSIHB_XSCOM_XIVR_FSI: 386 case PSIHB_XSCOM_XIVR_LPCI2C: 387 case PSIHB_XSCOM_XIVR_LOCERR: 388 case PSIHB_XSCOM_XIVR_EXT: 389 pnv_psi_set_xivr(psi, offset, val); 390 break; 391 case PSIHB_XSCOM_IRQ_STAT: 392 /* Read only */ 393 qemu_log_mask(LOG_GUEST_ERROR, "PSI: invalid write of IRQ_STAT\n"); 394 break; 395 case PSIHB_XSCOM_IRSN: 396 pnv_psi_set_irsn(psi, val); 397 break; 398 default: 399 qemu_log_mask(LOG_UNIMP, "PSI: write at 0x%" PRIx32 "\n", offset); 400 } 401 } 402 403 /* 404 * The values of the registers when accessed through the MMIO region 405 * follow the relation : xscom = (mmio + 0x50) >> 3 406 */ 407 static uint64_t pnv_psi_mmio_read(void *opaque, hwaddr addr, unsigned size) 408 { 409 return pnv_psi_reg_read(opaque, PSIHB_REG(addr), true); 410 } 411 412 static void pnv_psi_mmio_write(void *opaque, hwaddr addr, 413 uint64_t val, unsigned size) 414 { 415 pnv_psi_reg_write(opaque, PSIHB_REG(addr), val, true); 416 } 417 418 static const MemoryRegionOps psi_mmio_ops = { 419 .read = pnv_psi_mmio_read, 420 .write = pnv_psi_mmio_write, 421 .endianness = DEVICE_BIG_ENDIAN, 422 .valid = { 423 .min_access_size = 8, 424 .max_access_size = 8, 425 }, 426 .impl = { 427 .min_access_size = 8, 428 .max_access_size = 8, 429 }, 430 }; 431 432 static uint64_t pnv_psi_xscom_read(void *opaque, hwaddr addr, unsigned size) 433 { 434 return pnv_psi_reg_read(opaque, addr >> 3, false); 435 } 436 437 static void pnv_psi_xscom_write(void *opaque, hwaddr addr, 438 uint64_t val, unsigned size) 439 { 440 pnv_psi_reg_write(opaque, addr >> 3, val, false); 441 } 442 443 static const MemoryRegionOps pnv_psi_xscom_ops = { 444 .read = pnv_psi_xscom_read, 445 .write = pnv_psi_xscom_write, 446 .endianness = DEVICE_BIG_ENDIAN, 447 .valid = { 448 .min_access_size = 8, 449 .max_access_size = 8, 450 }, 451 .impl = { 452 .min_access_size = 8, 453 .max_access_size = 8, 454 } 455 }; 456 457 static void pnv_psi_reset(void *dev) 458 { 459 PnvPsi *psi = PNV_PSI(dev); 460 461 memset(psi->regs, 0x0, sizeof(psi->regs)); 462 463 psi->regs[PSIHB_XSCOM_BAR] = psi->bar | PSIHB_BAR_EN; 464 } 465 466 static void pnv_psi_power8_instance_init(Object *obj) 467 { 468 Pnv8Psi *psi8 = PNV8_PSI(obj); 469 470 object_initialize_child(obj, "ics-psi", &psi8->ics, sizeof(psi8->ics), 471 TYPE_ICS_SIMPLE, &error_abort, NULL); 472 } 473 474 static const uint8_t irq_to_xivr[] = { 475 PSIHB_XSCOM_XIVR_FSP, 476 PSIHB_XSCOM_XIVR_OCC, 477 PSIHB_XSCOM_XIVR_FSI, 478 PSIHB_XSCOM_XIVR_LPCI2C, 479 PSIHB_XSCOM_XIVR_LOCERR, 480 PSIHB_XSCOM_XIVR_EXT, 481 }; 482 483 static void pnv_psi_power8_realize(DeviceState *dev, Error **errp) 484 { 485 PnvPsi *psi = PNV_PSI(dev); 486 ICSState *ics = &PNV8_PSI(psi)->ics; 487 Object *obj; 488 Error *err = NULL; 489 unsigned int i; 490 491 obj = object_property_get_link(OBJECT(dev), "xics", &err); 492 if (!obj) { 493 error_setg(errp, "%s: required link 'xics' not found: %s", 494 __func__, error_get_pretty(err)); 495 return; 496 } 497 498 /* Create PSI interrupt control source */ 499 object_property_add_const_link(OBJECT(ics), ICS_PROP_XICS, obj, 500 &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_simple_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 const char compat_p8[] = "ibm,power8-psihb-x\0ibm,psihb-x"; 540 static const char compat_p9[] = "ibm,power9-psihb-x\0ibm,psihb-x"; 541 542 static int pnv_psi_dt_xscom(PnvXScomInterface *dev, void *fdt, int xscom_offset) 543 { 544 PnvPsiClass *ppc = PNV_PSI_GET_CLASS(dev); 545 char *name; 546 int offset; 547 uint32_t reg[] = { 548 cpu_to_be32(ppc->xscom_pcba), 549 cpu_to_be32(ppc->xscom_size) 550 }; 551 552 name = g_strdup_printf("psihb@%x", ppc->xscom_pcba); 553 offset = fdt_add_subnode(fdt, xscom_offset, name); 554 _FDT(offset); 555 g_free(name); 556 557 _FDT(fdt_setprop(fdt, offset, "reg", reg, sizeof(reg))); 558 _FDT(fdt_setprop_cell(fdt, offset, "#address-cells", 2)); 559 _FDT(fdt_setprop_cell(fdt, offset, "#size-cells", 1)); 560 if (ppc->chip_type == PNV_CHIP_POWER9) { 561 _FDT(fdt_setprop(fdt, offset, "compatible", compat_p9, 562 sizeof(compat_p9))); 563 } else { 564 _FDT(fdt_setprop(fdt, offset, "compatible", compat_p8, 565 sizeof(compat_p8))); 566 } 567 return 0; 568 } 569 570 static Property pnv_psi_properties[] = { 571 DEFINE_PROP_UINT64("bar", PnvPsi, bar, 0), 572 DEFINE_PROP_UINT64("fsp-bar", PnvPsi, fsp_bar, 0), 573 DEFINE_PROP_END_OF_LIST(), 574 }; 575 576 static void pnv_psi_power8_class_init(ObjectClass *klass, void *data) 577 { 578 DeviceClass *dc = DEVICE_CLASS(klass); 579 PnvPsiClass *ppc = PNV_PSI_CLASS(klass); 580 581 dc->desc = "PowerNV PSI Controller POWER8"; 582 dc->realize = pnv_psi_power8_realize; 583 584 ppc->chip_type = PNV_CHIP_POWER8; 585 ppc->xscom_pcba = PNV_XSCOM_PSIHB_BASE; 586 ppc->xscom_size = PNV_XSCOM_PSIHB_SIZE; 587 ppc->bar_mask = PSIHB_BAR_MASK; 588 ppc->irq_set = pnv_psi_power8_irq_set; 589 } 590 591 static const TypeInfo pnv_psi_power8_info = { 592 .name = TYPE_PNV8_PSI, 593 .parent = TYPE_PNV_PSI, 594 .instance_size = sizeof(Pnv8Psi), 595 .instance_init = pnv_psi_power8_instance_init, 596 .class_init = pnv_psi_power8_class_init, 597 }; 598 599 600 /* Common registers */ 601 602 #define PSIHB9_CR 0x20 603 #define PSIHB9_SEMR 0x28 604 605 /* P9 registers */ 606 607 #define PSIHB9_INTERRUPT_CONTROL 0x58 608 #define PSIHB9_IRQ_METHOD PPC_BIT(0) 609 #define PSIHB9_IRQ_RESET PPC_BIT(1) 610 #define PSIHB9_ESB_CI_BASE 0x60 611 #define PSIHB9_ESB_CI_VALID 1 612 #define PSIHB9_ESB_NOTIF_ADDR 0x68 613 #define PSIHB9_ESB_NOTIF_VALID 1 614 #define PSIHB9_IVT_OFFSET 0x70 615 #define PSIHB9_IVT_OFF_SHIFT 32 616 617 #define PSIHB9_IRQ_LEVEL 0x78 /* assertion */ 618 #define PSIHB9_IRQ_LEVEL_PSI PPC_BIT(0) 619 #define PSIHB9_IRQ_LEVEL_OCC PPC_BIT(1) 620 #define PSIHB9_IRQ_LEVEL_FSI PPC_BIT(2) 621 #define PSIHB9_IRQ_LEVEL_LPCHC PPC_BIT(3) 622 #define PSIHB9_IRQ_LEVEL_LOCAL_ERR PPC_BIT(4) 623 #define PSIHB9_IRQ_LEVEL_GLOBAL_ERR PPC_BIT(5) 624 #define PSIHB9_IRQ_LEVEL_TPM PPC_BIT(6) 625 #define PSIHB9_IRQ_LEVEL_LPC_SIRQ1 PPC_BIT(7) 626 #define PSIHB9_IRQ_LEVEL_LPC_SIRQ2 PPC_BIT(8) 627 #define PSIHB9_IRQ_LEVEL_LPC_SIRQ3 PPC_BIT(9) 628 #define PSIHB9_IRQ_LEVEL_LPC_SIRQ4 PPC_BIT(10) 629 #define PSIHB9_IRQ_LEVEL_SBE_I2C PPC_BIT(11) 630 #define PSIHB9_IRQ_LEVEL_DIO PPC_BIT(12) 631 #define PSIHB9_IRQ_LEVEL_PSU PPC_BIT(13) 632 #define PSIHB9_IRQ_LEVEL_I2C_C PPC_BIT(14) 633 #define PSIHB9_IRQ_LEVEL_I2C_D PPC_BIT(15) 634 #define PSIHB9_IRQ_LEVEL_I2C_E PPC_BIT(16) 635 #define PSIHB9_IRQ_LEVEL_SBE PPC_BIT(19) 636 637 #define PSIHB9_IRQ_STAT 0x80 /* P bit */ 638 #define PSIHB9_IRQ_STAT_PSI PPC_BIT(0) 639 #define PSIHB9_IRQ_STAT_OCC PPC_BIT(1) 640 #define PSIHB9_IRQ_STAT_FSI PPC_BIT(2) 641 #define PSIHB9_IRQ_STAT_LPCHC PPC_BIT(3) 642 #define PSIHB9_IRQ_STAT_LOCAL_ERR PPC_BIT(4) 643 #define PSIHB9_IRQ_STAT_GLOBAL_ERR PPC_BIT(5) 644 #define PSIHB9_IRQ_STAT_TPM PPC_BIT(6) 645 #define PSIHB9_IRQ_STAT_LPC_SIRQ1 PPC_BIT(7) 646 #define PSIHB9_IRQ_STAT_LPC_SIRQ2 PPC_BIT(8) 647 #define PSIHB9_IRQ_STAT_LPC_SIRQ3 PPC_BIT(9) 648 #define PSIHB9_IRQ_STAT_LPC_SIRQ4 PPC_BIT(10) 649 #define PSIHB9_IRQ_STAT_SBE_I2C PPC_BIT(11) 650 #define PSIHB9_IRQ_STAT_DIO PPC_BIT(12) 651 #define PSIHB9_IRQ_STAT_PSU PPC_BIT(13) 652 653 static void pnv_psi_notify(XiveNotifier *xf, uint32_t srcno) 654 { 655 PnvPsi *psi = PNV_PSI(xf); 656 uint64_t notif_port = psi->regs[PSIHB_REG(PSIHB9_ESB_NOTIF_ADDR)]; 657 bool valid = notif_port & PSIHB9_ESB_NOTIF_VALID; 658 uint64_t notify_addr = notif_port & ~PSIHB9_ESB_NOTIF_VALID; 659 660 uint32_t offset = 661 (psi->regs[PSIHB_REG(PSIHB9_IVT_OFFSET)] >> PSIHB9_IVT_OFF_SHIFT); 662 uint64_t lisn = cpu_to_be64(offset + srcno); 663 664 if (valid) { 665 cpu_physical_memory_write(notify_addr, &lisn, sizeof(lisn)); 666 } 667 } 668 669 static uint64_t pnv_psi_p9_mmio_read(void *opaque, hwaddr addr, unsigned size) 670 { 671 PnvPsi *psi = PNV_PSI(opaque); 672 uint32_t reg = PSIHB_REG(addr); 673 uint64_t val = -1; 674 675 switch (addr) { 676 case PSIHB9_CR: 677 case PSIHB9_SEMR: 678 /* FSP stuff */ 679 case PSIHB9_INTERRUPT_CONTROL: 680 case PSIHB9_ESB_CI_BASE: 681 case PSIHB9_ESB_NOTIF_ADDR: 682 case PSIHB9_IVT_OFFSET: 683 val = psi->regs[reg]; 684 break; 685 default: 686 qemu_log_mask(LOG_GUEST_ERROR, "PSI: read at 0x%" PRIx64 "\n", addr); 687 } 688 689 return val; 690 } 691 692 static void pnv_psi_p9_mmio_write(void *opaque, hwaddr addr, 693 uint64_t val, unsigned size) 694 { 695 PnvPsi *psi = PNV_PSI(opaque); 696 Pnv9Psi *psi9 = PNV9_PSI(psi); 697 uint32_t reg = PSIHB_REG(addr); 698 MemoryRegion *sysmem = get_system_memory(); 699 700 switch (addr) { 701 case PSIHB9_CR: 702 case PSIHB9_SEMR: 703 /* FSP stuff */ 704 break; 705 case PSIHB9_INTERRUPT_CONTROL: 706 if (val & PSIHB9_IRQ_RESET) { 707 device_reset(DEVICE(&psi9->source)); 708 } 709 psi->regs[reg] = val; 710 break; 711 712 case PSIHB9_ESB_CI_BASE: 713 if (!(val & PSIHB9_ESB_CI_VALID)) { 714 if (psi->regs[reg] & PSIHB9_ESB_CI_VALID) { 715 memory_region_del_subregion(sysmem, &psi9->source.esb_mmio); 716 } 717 } else { 718 if (!(psi->regs[reg] & PSIHB9_ESB_CI_VALID)) { 719 memory_region_add_subregion(sysmem, 720 val & ~PSIHB9_ESB_CI_VALID, 721 &psi9->source.esb_mmio); 722 } 723 } 724 psi->regs[reg] = val; 725 break; 726 727 case PSIHB9_ESB_NOTIF_ADDR: 728 psi->regs[reg] = val; 729 break; 730 case PSIHB9_IVT_OFFSET: 731 psi->regs[reg] = val; 732 break; 733 default: 734 qemu_log_mask(LOG_GUEST_ERROR, "PSI: write at 0x%" PRIx64 "\n", addr); 735 } 736 } 737 738 static const MemoryRegionOps pnv_psi_p9_mmio_ops = { 739 .read = pnv_psi_p9_mmio_read, 740 .write = pnv_psi_p9_mmio_write, 741 .endianness = DEVICE_BIG_ENDIAN, 742 .valid = { 743 .min_access_size = 8, 744 .max_access_size = 8, 745 }, 746 .impl = { 747 .min_access_size = 8, 748 .max_access_size = 8, 749 }, 750 }; 751 752 static uint64_t pnv_psi_p9_xscom_read(void *opaque, hwaddr addr, unsigned size) 753 { 754 /* No read are expected */ 755 qemu_log_mask(LOG_GUEST_ERROR, "PSI: xscom read at 0x%" PRIx64 "\n", addr); 756 return -1; 757 } 758 759 static void pnv_psi_p9_xscom_write(void *opaque, hwaddr addr, 760 uint64_t val, unsigned size) 761 { 762 PnvPsi *psi = PNV_PSI(opaque); 763 764 /* XSCOM is only used to set the PSIHB MMIO region */ 765 switch (addr >> 3) { 766 case PSIHB_XSCOM_BAR: 767 pnv_psi_set_bar(psi, val); 768 break; 769 default: 770 qemu_log_mask(LOG_GUEST_ERROR, "PSI: xscom write at 0x%" PRIx64 "\n", 771 addr); 772 } 773 } 774 775 static const MemoryRegionOps pnv_psi_p9_xscom_ops = { 776 .read = pnv_psi_p9_xscom_read, 777 .write = pnv_psi_p9_xscom_write, 778 .endianness = DEVICE_BIG_ENDIAN, 779 .valid = { 780 .min_access_size = 8, 781 .max_access_size = 8, 782 }, 783 .impl = { 784 .min_access_size = 8, 785 .max_access_size = 8, 786 } 787 }; 788 789 static void pnv_psi_power9_irq_set(PnvPsi *psi, int irq, bool state) 790 { 791 uint64_t irq_method = psi->regs[PSIHB_REG(PSIHB9_INTERRUPT_CONTROL)]; 792 793 if (irq > PSIHB9_NUM_IRQS) { 794 qemu_log_mask(LOG_GUEST_ERROR, "PSI: Unsupported irq %d\n", irq); 795 return; 796 } 797 798 if (irq_method & PSIHB9_IRQ_METHOD) { 799 qemu_log_mask(LOG_GUEST_ERROR, "PSI: LSI IRQ method no supported\n"); 800 return; 801 } 802 803 /* Update LSI levels */ 804 if (state) { 805 psi->regs[PSIHB_REG(PSIHB9_IRQ_LEVEL)] |= PPC_BIT(irq); 806 } else { 807 psi->regs[PSIHB_REG(PSIHB9_IRQ_LEVEL)] &= ~PPC_BIT(irq); 808 } 809 810 qemu_set_irq(psi->qirqs[irq], state); 811 } 812 813 static void pnv_psi_power9_reset(void *dev) 814 { 815 Pnv9Psi *psi = PNV9_PSI(dev); 816 817 pnv_psi_reset(dev); 818 819 if (memory_region_is_mapped(&psi->source.esb_mmio)) { 820 memory_region_del_subregion(get_system_memory(), &psi->source.esb_mmio); 821 } 822 } 823 824 static void pnv_psi_power9_instance_init(Object *obj) 825 { 826 Pnv9Psi *psi = PNV9_PSI(obj); 827 828 object_initialize_child(obj, "source", &psi->source, sizeof(psi->source), 829 TYPE_XIVE_SOURCE, &error_abort, NULL); 830 } 831 832 static void pnv_psi_power9_realize(DeviceState *dev, Error **errp) 833 { 834 PnvPsi *psi = PNV_PSI(dev); 835 XiveSource *xsrc = &PNV9_PSI(psi)->source; 836 Error *local_err = NULL; 837 int i; 838 839 /* This is the only device with 4k ESB pages */ 840 object_property_set_int(OBJECT(xsrc), XIVE_ESB_4K, "shift", 841 &error_fatal); 842 object_property_set_int(OBJECT(xsrc), PSIHB9_NUM_IRQS, "nr-irqs", 843 &error_fatal); 844 object_property_add_const_link(OBJECT(xsrc), "xive", OBJECT(psi), 845 &error_fatal); 846 object_property_set_bool(OBJECT(xsrc), true, "realized", &local_err); 847 if (local_err) { 848 error_propagate(errp, local_err); 849 return; 850 } 851 852 for (i = 0; i < xsrc->nr_irqs; i++) { 853 xive_source_irq_set_lsi(xsrc, i); 854 } 855 856 psi->qirqs = qemu_allocate_irqs(xive_source_set_irq, xsrc, xsrc->nr_irqs); 857 858 /* XSCOM region for PSI registers */ 859 pnv_xscom_region_init(&psi->xscom_regs, OBJECT(dev), &pnv_psi_p9_xscom_ops, 860 psi, "xscom-psi", PNV9_XSCOM_PSIHB_SIZE); 861 862 /* MMIO region for PSI registers */ 863 memory_region_init_io(&psi->regs_mr, OBJECT(dev), &pnv_psi_p9_mmio_ops, psi, 864 "psihb", PNV9_PSIHB_SIZE); 865 866 pnv_psi_set_bar(psi, psi->bar | PSIHB_BAR_EN); 867 868 qemu_register_reset(pnv_psi_power9_reset, dev); 869 } 870 871 static void pnv_psi_power9_class_init(ObjectClass *klass, void *data) 872 { 873 DeviceClass *dc = DEVICE_CLASS(klass); 874 PnvPsiClass *ppc = PNV_PSI_CLASS(klass); 875 XiveNotifierClass *xfc = XIVE_NOTIFIER_CLASS(klass); 876 877 dc->desc = "PowerNV PSI Controller POWER9"; 878 dc->realize = pnv_psi_power9_realize; 879 880 ppc->chip_type = PNV_CHIP_POWER9; 881 ppc->xscom_pcba = PNV9_XSCOM_PSIHB_BASE; 882 ppc->xscom_size = PNV9_XSCOM_PSIHB_SIZE; 883 ppc->bar_mask = PSIHB9_BAR_MASK; 884 ppc->irq_set = pnv_psi_power9_irq_set; 885 886 xfc->notify = pnv_psi_notify; 887 } 888 889 static const TypeInfo pnv_psi_power9_info = { 890 .name = TYPE_PNV9_PSI, 891 .parent = TYPE_PNV_PSI, 892 .instance_size = sizeof(Pnv9Psi), 893 .instance_init = pnv_psi_power9_instance_init, 894 .class_init = pnv_psi_power9_class_init, 895 .interfaces = (InterfaceInfo[]) { 896 { TYPE_XIVE_NOTIFIER }, 897 { }, 898 }, 899 }; 900 901 static void pnv_psi_class_init(ObjectClass *klass, void *data) 902 { 903 DeviceClass *dc = DEVICE_CLASS(klass); 904 PnvXScomInterfaceClass *xdc = PNV_XSCOM_INTERFACE_CLASS(klass); 905 906 xdc->dt_xscom = pnv_psi_dt_xscom; 907 908 dc->desc = "PowerNV PSI Controller"; 909 dc->props = pnv_psi_properties; 910 } 911 912 static const TypeInfo pnv_psi_info = { 913 .name = TYPE_PNV_PSI, 914 .parent = TYPE_SYS_BUS_DEVICE, 915 .instance_size = sizeof(PnvPsi), 916 .class_init = pnv_psi_class_init, 917 .class_size = sizeof(PnvPsiClass), 918 .abstract = true, 919 .interfaces = (InterfaceInfo[]) { 920 { TYPE_PNV_XSCOM_INTERFACE }, 921 { } 922 } 923 }; 924 925 static void pnv_psi_register_types(void) 926 { 927 type_register_static(&pnv_psi_info); 928 type_register_static(&pnv_psi_power8_info); 929 type_register_static(&pnv_psi_power9_info); 930 } 931 932 type_init(pnv_psi_register_types); 933 934 void pnv_psi_pic_print_info(Pnv9Psi *psi9, Monitor *mon) 935 { 936 PnvPsi *psi = PNV_PSI(psi9); 937 938 uint32_t offset = 939 (psi->regs[PSIHB_REG(PSIHB9_IVT_OFFSET)] >> PSIHB9_IVT_OFF_SHIFT); 940 941 monitor_printf(mon, "PSIHB Source %08x .. %08x\n", 942 offset, offset + psi9->source.nr_irqs - 1); 943 xive_source_pic_print_info(&psi9->source, offset, mon); 944 } 945