hw/ppc/pnv_psi.c

   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(DeviceState *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_reset_handler(void *dev)
 468 {
 469     device_legacy_reset(DEVICE(dev));
 470 }
 471
 472 static void pnv_psi_realize(DeviceState *dev, Error **errp)
 473 {
 474     PnvPsi *psi = PNV_PSI(dev);
 475
 476     /* Default BAR for MMIO region */
 477     pnv_psi_set_bar(psi, psi->bar | PSIHB_BAR_EN);
 478
 479     qemu_register_reset(pnv_psi_reset_handler, dev);
 480 }
 481
 482 static void pnv_psi_power8_instance_init(Object *obj)
 483 {
 484     Pnv8Psi *psi8 = PNV8_PSI(obj);
 485
 486     object_initialize_child(obj, "ics-psi", &psi8->ics, TYPE_ICS);
 487     object_property_add_alias(obj, ICS_PROP_XICS, OBJECT(&psi8->ics),
 488                               ICS_PROP_XICS);
 489 }
 490
 491 static const uint8_t irq_to_xivr[] = {
 492     PSIHB_XSCOM_XIVR_FSP,
 493     PSIHB_XSCOM_XIVR_OCC,
 494     PSIHB_XSCOM_XIVR_FSI,
 495     PSIHB_XSCOM_XIVR_LPCI2C,
 496     PSIHB_XSCOM_XIVR_LOCERR,
 497     PSIHB_XSCOM_XIVR_EXT,
 498 };
 499
 500 static void pnv_psi_power8_realize(DeviceState *dev, Error **errp)
 501 {
 502     PnvPsi *psi = PNV_PSI(dev);
 503     ICSState *ics = &PNV8_PSI(psi)->ics;
 504     unsigned int i;
 505
 506     /* Create PSI interrupt control source */
 507     if (!object_property_set_int(OBJECT(ics), "nr-irqs", PSI_NUM_INTERRUPTS,
 508                                  errp)) {
 509         return;
 510     }
 511     if (!qdev_realize(DEVICE(ics), NULL, errp)) {
 512         return;
 513     }
 514
 515     for (i = 0; i < ics->nr_irqs; i++) {
 516         ics_set_irq_type(ics, i, true);
 517     }
 518
 519     psi->qirqs = qemu_allocate_irqs(ics_set_irq, ics, ics->nr_irqs);
 520
 521     /* XSCOM region for PSI registers */
 522     pnv_xscom_region_init(&psi->xscom_regs, OBJECT(dev), &pnv_psi_xscom_ops,
 523                 psi, "xscom-psi", PNV_XSCOM_PSIHB_SIZE);
 524
 525     /* Initialize MMIO region */
 526     memory_region_init_io(&psi->regs_mr, OBJECT(dev), &psi_mmio_ops, psi,
 527                           "psihb", PNV_PSIHB_SIZE);
 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     pnv_psi_realize(dev, errp);
 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_legacy_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(DeviceState *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, TYPE_XIVE_SOURCE);
 835 }
 836
 837 static void pnv_psi_power9_realize(DeviceState *dev, Error **errp)
 838 {
 839     PnvPsi *psi = PNV_PSI(dev);
 840     XiveSource *xsrc = &PNV9_PSI(psi)->source;
 841     int i;
 842
 843     /* This is the only device with 4k ESB pages */
 844     object_property_set_int(OBJECT(xsrc), "shift", XIVE_ESB_4K, &error_fatal);
 845     object_property_set_int(OBJECT(xsrc), "nr-irqs", PSIHB9_NUM_IRQS,
 846                             &error_fatal);
 847     object_property_set_link(OBJECT(xsrc), "xive", OBJECT(psi), &error_abort);
 848     if (!qdev_realize(DEVICE(xsrc), NULL, errp)) {
 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_realize(dev, errp);
 867 }
 868
 869 static void pnv_psi_power9_class_init(ObjectClass *klass, void *data)
 870 {
 871     DeviceClass *dc = DEVICE_CLASS(klass);
 872     PnvPsiClass *ppc = PNV_PSI_CLASS(klass);
 873     XiveNotifierClass *xfc = XIVE_NOTIFIER_CLASS(klass);
 874     static const char compat[] = "ibm,power9-psihb-x\0ibm,psihb-x";
 875
 876     dc->desc    = "PowerNV PSI Controller POWER9";
 877     dc->realize = pnv_psi_power9_realize;
 878     dc->reset   = pnv_psi_power9_reset;
 879
 880     ppc->xscom_pcba = PNV9_XSCOM_PSIHB_BASE;
 881     ppc->xscom_size = PNV9_XSCOM_PSIHB_SIZE;
 882     ppc->bar_mask   = PSIHB9_BAR_MASK;
 883     ppc->irq_set    = pnv_psi_power9_irq_set;
 884     ppc->compat     = compat;
 885     ppc->compat_size = sizeof(compat);
 886
 887     xfc->notify      = pnv_psi_notify;
 888 }
 889
 890 static const TypeInfo pnv_psi_power9_info = {
 891     .name          = TYPE_PNV9_PSI,
 892     .parent        = TYPE_PNV_PSI,
 893     .instance_size = sizeof(Pnv9Psi),
 894     .instance_init = pnv_psi_power9_instance_init,
 895     .class_init    = pnv_psi_power9_class_init,
 896     .interfaces = (InterfaceInfo[]) {
 897             { TYPE_XIVE_NOTIFIER },
 898             { },
 899     },
 900 };
 901
 902 static void pnv_psi_power10_class_init(ObjectClass *klass, void *data)
 903 {
 904     DeviceClass *dc = DEVICE_CLASS(klass);
 905     PnvPsiClass *ppc = PNV_PSI_CLASS(klass);
 906     static const char compat[] = "ibm,power10-psihb-x\0ibm,psihb-x";
 907
 908     dc->desc    = "PowerNV PSI Controller POWER10";
 909
 910     ppc->xscom_pcba = PNV10_XSCOM_PSIHB_BASE;
 911     ppc->xscom_size = PNV10_XSCOM_PSIHB_SIZE;
 912     ppc->compat     = compat;
 913     ppc->compat_size = sizeof(compat);
 914 }
 915
 916 static const TypeInfo pnv_psi_power10_info = {
 917     .name          = TYPE_PNV10_PSI,
 918     .parent        = TYPE_PNV9_PSI,
 919     .class_init    = pnv_psi_power10_class_init,
 920 };
 921
 922 static void pnv_psi_class_init(ObjectClass *klass, void *data)
 923 {
 924     DeviceClass *dc = DEVICE_CLASS(klass);
 925     PnvXScomInterfaceClass *xdc = PNV_XSCOM_INTERFACE_CLASS(klass);
 926
 927     xdc->dt_xscom = pnv_psi_dt_xscom;
 928
 929     dc->desc = "PowerNV PSI Controller";
 930     device_class_set_props(dc, pnv_psi_properties);
 931     dc->reset = pnv_psi_reset;
 932     dc->user_creatable = false;
 933 }
 934
 935 static const TypeInfo pnv_psi_info = {
 936     .name          = TYPE_PNV_PSI,
 937     .parent        = TYPE_DEVICE,
 938     .instance_size = sizeof(PnvPsi),
 939     .class_init    = pnv_psi_class_init,
 940     .class_size    = sizeof(PnvPsiClass),
 941     .abstract      = true,
 942     .interfaces    = (InterfaceInfo[]) {
 943         { TYPE_PNV_XSCOM_INTERFACE },
 944         { }
 945     }
 946 };
 947
 948 static void pnv_psi_register_types(void)
 949 {
 950     type_register_static(&pnv_psi_info);
 951     type_register_static(&pnv_psi_power8_info);
 952     type_register_static(&pnv_psi_power9_info);
 953     type_register_static(&pnv_psi_power10_info);
 954 }
 955
 956 type_init(pnv_psi_register_types);
 957
 958 void pnv_psi_pic_print_info(Pnv9Psi *psi9, Monitor *mon)
 959 {
 960     PnvPsi *psi = PNV_PSI(psi9);
 961
 962     uint32_t offset =
 963         (psi->regs[PSIHB_REG(PSIHB9_IVT_OFFSET)] >> PSIHB9_IVT_OFF_SHIFT);
 964
 965     monitor_printf(mon, "PSIHB Source %08x .. %08x\n",
 966                   offset, offset + psi9->source.nr_irqs - 1);
 967     xive_source_pic_print_info(&psi9->source, offset, mon);
 968 }