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     Error *err = NULL;
 505     unsigned int i;
 506
 507     /* Create PSI interrupt control source */
 508     if (!object_property_set_int(OBJECT(ics), "nr-irqs", PSI_NUM_INTERRUPTS,
 509                                  &err)) {
 510         error_propagate(errp, err);
 511         return;
 512     }
 513     if (!qdev_realize(DEVICE(ics), NULL, &err)) {
 514         error_propagate(errp, err);
 515         return;
 516     }
 517
 518     for (i = 0; i < ics->nr_irqs; i++) {
 519         ics_set_irq_type(ics, i, true);
 520     }
 521
 522     psi->qirqs = qemu_allocate_irqs(ics_set_irq, ics, ics->nr_irqs);
 523
 524     /* XSCOM region for PSI registers */
 525     pnv_xscom_region_init(&psi->xscom_regs, OBJECT(dev), &pnv_psi_xscom_ops,
 526                 psi, "xscom-psi", PNV_XSCOM_PSIHB_SIZE);
 527
 528     /* Initialize MMIO region */
 529     memory_region_init_io(&psi->regs_mr, OBJECT(dev), &psi_mmio_ops, psi,
 530                           "psihb", PNV_PSIHB_SIZE);
 531
 532     /* Default sources in XIVR */
 533     for (i = 0; i < PSI_NUM_INTERRUPTS; i++) {
 534         uint8_t xivr = irq_to_xivr[i];
 535         psi->regs[xivr] = PSIHB_XIVR_PRIO_MSK |
 536             ((uint64_t) i << PSIHB_XIVR_SRC_SH);
 537     }
 538
 539     pnv_psi_realize(dev, errp);
 540 }
 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     _FDT(fdt_setprop(fdt, offset, "compatible", ppc->compat,
 561                      ppc->compat_size));
 562     return 0;
 563 }
 564
 565 static Property pnv_psi_properties[] = {
 566     DEFINE_PROP_UINT64("bar", PnvPsi, bar, 0),
 567     DEFINE_PROP_UINT64("fsp-bar", PnvPsi, fsp_bar, 0),
 568     DEFINE_PROP_END_OF_LIST(),
 569 };
 570
 571 static void pnv_psi_power8_class_init(ObjectClass *klass, void *data)
 572 {
 573     DeviceClass *dc = DEVICE_CLASS(klass);
 574     PnvPsiClass *ppc = PNV_PSI_CLASS(klass);
 575     static const char compat[] = "ibm,power8-psihb-x\0ibm,psihb-x";
 576
 577     dc->desc    = "PowerNV PSI Controller POWER8";
 578     dc->realize = pnv_psi_power8_realize;
 579
 580     ppc->xscom_pcba = PNV_XSCOM_PSIHB_BASE;
 581     ppc->xscom_size = PNV_XSCOM_PSIHB_SIZE;
 582     ppc->bar_mask   = PSIHB_BAR_MASK;
 583     ppc->irq_set    = pnv_psi_power8_irq_set;
 584     ppc->compat     = compat;
 585     ppc->compat_size = sizeof(compat);
 586 }
 587
 588 static const TypeInfo pnv_psi_power8_info = {
 589     .name          = TYPE_PNV8_PSI,
 590     .parent        = TYPE_PNV_PSI,
 591     .instance_size = sizeof(Pnv8Psi),
 592     .instance_init = pnv_psi_power8_instance_init,
 593     .class_init    = pnv_psi_power8_class_init,
 594 };
 595
 596
 597 /* Common registers */
 598
 599 #define PSIHB9_CR                       0x20
 600 #define PSIHB9_SEMR                     0x28
 601
 602 /* P9 registers */
 603
 604 #define PSIHB9_INTERRUPT_CONTROL        0x58
 605 #define   PSIHB9_IRQ_METHOD             PPC_BIT(0)
 606 #define   PSIHB9_IRQ_RESET              PPC_BIT(1)
 607 #define PSIHB9_ESB_CI_BASE              0x60
 608 #define   PSIHB9_ESB_CI_64K             PPC_BIT(1)
 609 #define   PSIHB9_ESB_CI_ADDR_MASK       PPC_BITMASK(8, 47)
 610 #define   PSIHB9_ESB_CI_VALID           PPC_BIT(63)
 611 #define PSIHB9_ESB_NOTIF_ADDR           0x68
 612 #define   PSIHB9_ESB_NOTIF_ADDR_MASK    PPC_BITMASK(8, 60)
 613 #define   PSIHB9_ESB_NOTIF_VALID        PPC_BIT(63)
 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 data = XIVE_TRIGGER_PQ | offset | srcno;
 663     MemTxResult result;
 664
 665     if (!valid) {
 666         return;
 667     }
 668
 669     address_space_stq_be(&address_space_memory, notify_addr, data,
 670                          MEMTXATTRS_UNSPECIFIED, &result);
 671     if (result != MEMTX_OK) {
 672         qemu_log_mask(LOG_GUEST_ERROR, "%s: trigger failed @%"
 673                       HWADDR_PRIx "\n", __func__, notif_port);
 674         return;
 675     }
 676 }
 677
 678 static uint64_t pnv_psi_p9_mmio_read(void *opaque, hwaddr addr, unsigned size)
 679 {
 680     PnvPsi *psi = PNV_PSI(opaque);
 681     uint32_t reg = PSIHB_REG(addr);
 682     uint64_t val = -1;
 683
 684     switch (addr) {
 685     case PSIHB9_CR:
 686     case PSIHB9_SEMR:
 687         /* FSP stuff */
 688     case PSIHB9_INTERRUPT_CONTROL:
 689     case PSIHB9_ESB_CI_BASE:
 690     case PSIHB9_ESB_NOTIF_ADDR:
 691     case PSIHB9_IVT_OFFSET:
 692         val = psi->regs[reg];
 693         break;
 694     default:
 695         qemu_log_mask(LOG_GUEST_ERROR, "PSI: read at 0x%" PRIx64 "\n", addr);
 696     }
 697
 698     return val;
 699 }
 700
 701 static void pnv_psi_p9_mmio_write(void *opaque, hwaddr addr,
 702                                   uint64_t val, unsigned size)
 703 {
 704     PnvPsi *psi = PNV_PSI(opaque);
 705     Pnv9Psi *psi9 = PNV9_PSI(psi);
 706     uint32_t reg = PSIHB_REG(addr);
 707     MemoryRegion *sysmem = get_system_memory();
 708
 709     switch (addr) {
 710     case PSIHB9_CR:
 711     case PSIHB9_SEMR:
 712         /* FSP stuff */
 713         break;
 714     case PSIHB9_INTERRUPT_CONTROL:
 715         if (val & PSIHB9_IRQ_RESET) {
 716             device_legacy_reset(DEVICE(&psi9->source));
 717         }
 718         psi->regs[reg] = val;
 719         break;
 720
 721     case PSIHB9_ESB_CI_BASE:
 722         if (!(val & PSIHB9_ESB_CI_VALID)) {
 723             if (psi->regs[reg] & PSIHB9_ESB_CI_VALID) {
 724                 memory_region_del_subregion(sysmem, &psi9->source.esb_mmio);
 725             }
 726         } else {
 727             if (!(psi->regs[reg] & PSIHB9_ESB_CI_VALID)) {
 728                 memory_region_add_subregion(sysmem,
 729                                         val & ~PSIHB9_ESB_CI_VALID,
 730                                         &psi9->source.esb_mmio);
 731             }
 732         }
 733         psi->regs[reg] = val;
 734         break;
 735
 736     case PSIHB9_ESB_NOTIF_ADDR:
 737         psi->regs[reg] = val;
 738         break;
 739     case PSIHB9_IVT_OFFSET:
 740         psi->regs[reg] = val;
 741         break;
 742     default:
 743         qemu_log_mask(LOG_GUEST_ERROR, "PSI: write at 0x%" PRIx64 "\n", addr);
 744     }
 745 }
 746
 747 static const MemoryRegionOps pnv_psi_p9_mmio_ops = {
 748     .read = pnv_psi_p9_mmio_read,
 749     .write = pnv_psi_p9_mmio_write,
 750     .endianness = DEVICE_BIG_ENDIAN,
 751     .valid = {
 752         .min_access_size = 8,
 753         .max_access_size = 8,
 754     },
 755     .impl = {
 756         .min_access_size = 8,
 757         .max_access_size = 8,
 758     },
 759 };
 760
 761 static uint64_t pnv_psi_p9_xscom_read(void *opaque, hwaddr addr, unsigned size)
 762 {
 763     /* No read are expected */
 764     qemu_log_mask(LOG_GUEST_ERROR, "PSI: xscom read at 0x%" PRIx64 "\n", addr);
 765     return -1;
 766 }
 767
 768 static void pnv_psi_p9_xscom_write(void *opaque, hwaddr addr,
 769                                 uint64_t val, unsigned size)
 770 {
 771     PnvPsi *psi = PNV_PSI(opaque);
 772
 773     /* XSCOM is only used to set the PSIHB MMIO region */
 774     switch (addr >> 3) {
 775     case PSIHB_XSCOM_BAR:
 776         pnv_psi_set_bar(psi, val);
 777         break;
 778     default:
 779         qemu_log_mask(LOG_GUEST_ERROR, "PSI: xscom write at 0x%" PRIx64 "\n",
 780                       addr);
 781     }
 782 }
 783
 784 static const MemoryRegionOps pnv_psi_p9_xscom_ops = {
 785     .read = pnv_psi_p9_xscom_read,
 786     .write = pnv_psi_p9_xscom_write,
 787     .endianness = DEVICE_BIG_ENDIAN,
 788     .valid = {
 789         .min_access_size = 8,
 790         .max_access_size = 8,
 791     },
 792     .impl = {
 793         .min_access_size = 8,
 794         .max_access_size = 8,
 795     }
 796 };
 797
 798 static void pnv_psi_power9_irq_set(PnvPsi *psi, int irq, bool state)
 799 {
 800     uint64_t irq_method = psi->regs[PSIHB_REG(PSIHB9_INTERRUPT_CONTROL)];
 801
 802     if (irq > PSIHB9_NUM_IRQS) {
 803         qemu_log_mask(LOG_GUEST_ERROR, "PSI: Unsupported irq %d\n", irq);
 804         return;
 805     }
 806
 807     if (irq_method & PSIHB9_IRQ_METHOD) {
 808         qemu_log_mask(LOG_GUEST_ERROR, "PSI: LSI IRQ method no supported\n");
 809         return;
 810     }
 811
 812     /* Update LSI levels */
 813     if (state) {
 814         psi->regs[PSIHB_REG(PSIHB9_IRQ_LEVEL)] |= PPC_BIT(irq);
 815     } else {
 816         psi->regs[PSIHB_REG(PSIHB9_IRQ_LEVEL)] &= ~PPC_BIT(irq);
 817     }
 818
 819     qemu_set_irq(psi->qirqs[irq], state);
 820 }
 821
 822 static void pnv_psi_power9_reset(DeviceState *dev)
 823 {
 824     Pnv9Psi *psi = PNV9_PSI(dev);
 825
 826     pnv_psi_reset(dev);
 827
 828     if (memory_region_is_mapped(&psi->source.esb_mmio)) {
 829         memory_region_del_subregion(get_system_memory(), &psi->source.esb_mmio);
 830     }
 831 }
 832
 833 static void pnv_psi_power9_instance_init(Object *obj)
 834 {
 835     Pnv9Psi *psi = PNV9_PSI(obj);
 836
 837     object_initialize_child(obj, "source", &psi->source, TYPE_XIVE_SOURCE);
 838 }
 839
 840 static void pnv_psi_power9_realize(DeviceState *dev, Error **errp)
 841 {
 842     PnvPsi *psi = PNV_PSI(dev);
 843     XiveSource *xsrc = &PNV9_PSI(psi)->source;
 844     Error *local_err = NULL;
 845     int i;
 846
 847     /* This is the only device with 4k ESB pages */
 848     object_property_set_int(OBJECT(xsrc), "shift", XIVE_ESB_4K, &error_fatal);
 849     object_property_set_int(OBJECT(xsrc), "nr-irqs", PSIHB9_NUM_IRQS,
 850                             &error_fatal);
 851     object_property_set_link(OBJECT(xsrc), "xive", OBJECT(psi), &error_abort);
 852     if (!qdev_realize(DEVICE(xsrc), NULL, &local_err)) {
 853         error_propagate(errp, local_err);
 854         return;
 855     }
 856
 857     for (i = 0; i < xsrc->nr_irqs; i++) {
 858         xive_source_irq_set_lsi(xsrc, i);
 859     }
 860
 861     psi->qirqs = qemu_allocate_irqs(xive_source_set_irq, xsrc, xsrc->nr_irqs);
 862
 863     /* XSCOM region for PSI registers */
 864     pnv_xscom_region_init(&psi->xscom_regs, OBJECT(dev), &pnv_psi_p9_xscom_ops,
 865                 psi, "xscom-psi", PNV9_XSCOM_PSIHB_SIZE);
 866
 867     /* MMIO region for PSI registers */
 868     memory_region_init_io(&psi->regs_mr, OBJECT(dev), &pnv_psi_p9_mmio_ops, psi,
 869                           "psihb", PNV9_PSIHB_SIZE);
 870
 871     pnv_psi_realize(dev, errp);
 872 }
 873
 874 static void pnv_psi_power9_class_init(ObjectClass *klass, void *data)
 875 {
 876     DeviceClass *dc = DEVICE_CLASS(klass);
 877     PnvPsiClass *ppc = PNV_PSI_CLASS(klass);
 878     XiveNotifierClass *xfc = XIVE_NOTIFIER_CLASS(klass);
 879     static const char compat[] = "ibm,power9-psihb-x\0ibm,psihb-x";
 880
 881     dc->desc    = "PowerNV PSI Controller POWER9";
 882     dc->realize = pnv_psi_power9_realize;
 883     dc->reset   = pnv_psi_power9_reset;
 884
 885     ppc->xscom_pcba = PNV9_XSCOM_PSIHB_BASE;
 886     ppc->xscom_size = PNV9_XSCOM_PSIHB_SIZE;
 887     ppc->bar_mask   = PSIHB9_BAR_MASK;
 888     ppc->irq_set    = pnv_psi_power9_irq_set;
 889     ppc->compat     = compat;
 890     ppc->compat_size = sizeof(compat);
 891
 892     xfc->notify      = pnv_psi_notify;
 893 }
 894
 895 static const TypeInfo pnv_psi_power9_info = {
 896     .name          = TYPE_PNV9_PSI,
 897     .parent        = TYPE_PNV_PSI,
 898     .instance_size = sizeof(Pnv9Psi),
 899     .instance_init = pnv_psi_power9_instance_init,
 900     .class_init    = pnv_psi_power9_class_init,
 901     .interfaces = (InterfaceInfo[]) {
 902             { TYPE_XIVE_NOTIFIER },
 903             { },
 904     },
 905 };
 906
 907 static void pnv_psi_power10_class_init(ObjectClass *klass, void *data)
 908 {
 909     DeviceClass *dc = DEVICE_CLASS(klass);
 910     PnvPsiClass *ppc = PNV_PSI_CLASS(klass);
 911     static const char compat[] = "ibm,power10-psihb-x\0ibm,psihb-x";
 912
 913     dc->desc    = "PowerNV PSI Controller POWER10";
 914
 915     ppc->xscom_pcba = PNV10_XSCOM_PSIHB_BASE;
 916     ppc->xscom_size = PNV10_XSCOM_PSIHB_SIZE;
 917     ppc->compat     = compat;
 918     ppc->compat_size = sizeof(compat);
 919 }
 920
 921 static const TypeInfo pnv_psi_power10_info = {
 922     .name          = TYPE_PNV10_PSI,
 923     .parent        = TYPE_PNV9_PSI,
 924     .class_init    = pnv_psi_power10_class_init,
 925 };
 926
 927 static void pnv_psi_class_init(ObjectClass *klass, void *data)
 928 {
 929     DeviceClass *dc = DEVICE_CLASS(klass);
 930     PnvXScomInterfaceClass *xdc = PNV_XSCOM_INTERFACE_CLASS(klass);
 931
 932     xdc->dt_xscom = pnv_psi_dt_xscom;
 933
 934     dc->desc = "PowerNV PSI Controller";
 935     device_class_set_props(dc, pnv_psi_properties);
 936     dc->reset = pnv_psi_reset;
 937 }
 938
 939 static const TypeInfo pnv_psi_info = {
 940     .name          = TYPE_PNV_PSI,
 941     .parent        = TYPE_DEVICE,
 942     .instance_size = sizeof(PnvPsi),
 943     .class_init    = pnv_psi_class_init,
 944     .class_size    = sizeof(PnvPsiClass),
 945     .abstract      = true,
 946     .interfaces    = (InterfaceInfo[]) {
 947         { TYPE_PNV_XSCOM_INTERFACE },
 948         { }
 949     }
 950 };
 951
 952 static void pnv_psi_register_types(void)
 953 {
 954     type_register_static(&pnv_psi_info);
 955     type_register_static(&pnv_psi_power8_info);
 956     type_register_static(&pnv_psi_power9_info);
 957     type_register_static(&pnv_psi_power10_info);
 958 }
 959
 960 type_init(pnv_psi_register_types);
 961
 962 void pnv_psi_pic_print_info(Pnv9Psi *psi9, Monitor *mon)
 963 {
 964     PnvPsi *psi = PNV_PSI(psi9);
 965
 966     uint32_t offset =
 967         (psi->regs[PSIHB_REG(PSIHB9_IVT_OFFSET)] >> PSIHB9_IVT_OFF_SHIFT);
 968
 969     monitor_printf(mon, "PSIHB Source %08x .. %08x\n",
 970                   offset, offset + psi9->source.nr_irqs - 1);
 971     xive_source_pic_print_info(&psi9->source, offset, mon);
 972 }