| 1 | /* |
| 2 | * Copyright (c) 2018, Impinj, Inc. |
| 3 | * |
| 4 | * Designware PCIe IP block emulation |
| 5 | * |
| 6 | * This library is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This library is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with this library; if not, see |
| 18 | * <http://www.gnu.org/licenses/>. |
| 19 | */ |
| 20 | |
| 21 | #include "qemu/osdep.h" |
| 22 | #include "qapi/error.h" |
| 23 | #include "qemu/log.h" |
| 24 | #include "qemu/bitops.h" |
| 25 | #include "hw/pci/msi.h" |
| 26 | #include "hw/pci/pci_bridge.h" |
| 27 | #include "hw/pci/pci_host.h" |
| 28 | #include "hw/pci/pcie_port.h" |
| 29 | #include "hw/core/qdev-properties.h" |
| 30 | #include "migration/vmstate.h" |
| 31 | #include "hw/core/irq.h" |
| 32 | #include "hw/pci-host/designware.h" |
| 33 | |
| 34 | #define DESIGNWARE_PCIE_PORT_LINK_CONTROL 0x710 |
| 35 | #define DESIGNWARE_PCIE_PHY_DEBUG_R1 0x72C |
| 36 | #define DESIGNWARE_PCIE_PHY_DEBUG_R1_XMLH_LINK_UP BIT(4) |
| 37 | #define DESIGNWARE_PCIE_LINK_WIDTH_SPEED_CONTROL 0x80C |
| 38 | #define DESIGNWARE_PCIE_PORT_LOGIC_SPEED_CHANGE BIT(17) |
| 39 | #define DESIGNWARE_PCIE_MSI_ADDR_LO 0x820 |
| 40 | #define DESIGNWARE_PCIE_MSI_ADDR_HI 0x824 |
| 41 | #define DESIGNWARE_PCIE_MSI_INTR0_ENABLE 0x828 |
| 42 | #define DESIGNWARE_PCIE_MSI_INTR0_MASK 0x82C |
| 43 | #define DESIGNWARE_PCIE_MSI_INTR0_STATUS 0x830 |
| 44 | #define DESIGNWARE_PCIE_ATU_VIEWPORT 0x900 |
| 45 | #define DESIGNWARE_PCIE_ATU_REGION_INBOUND BIT(31) |
| 46 | #define DESIGNWARE_PCIE_ATU_CR1 0x904 |
| 47 | #define DESIGNWARE_PCIE_ATU_TYPE_MEM (0x0 << 0) |
| 48 | #define DESIGNWARE_PCIE_ATU_CR2 0x908 |
| 49 | #define DESIGNWARE_PCIE_ATU_ENABLE BIT(31) |
| 50 | #define DESIGNWARE_PCIE_ATU_LOWER_BASE 0x90C |
| 51 | #define DESIGNWARE_PCIE_ATU_UPPER_BASE 0x910 |
| 52 | #define DESIGNWARE_PCIE_ATU_LIMIT 0x914 |
| 53 | #define DESIGNWARE_PCIE_ATU_LOWER_TARGET 0x918 |
| 54 | #define DESIGNWARE_PCIE_ATU_BUS(x) (((x) >> 24) & 0xff) |
| 55 | #define DESIGNWARE_PCIE_ATU_DEVFN(x) (((x) >> 16) & 0xff) |
| 56 | #define DESIGNWARE_PCIE_ATU_UPPER_TARGET 0x91C |
| 57 | |
| 58 | static void designware_pcie_root_bus_class_init(ObjectClass *klass, |
| 59 | const void *data) |
| 60 | { |
| 61 | BusClass *k = BUS_CLASS(klass); |
| 62 | |
| 63 | /* |
| 64 | * Designware has only a single root complex. Enforce the limit on the |
| 65 | * parent bus |
| 66 | */ |
| 67 | k->max_dev = 1; |
| 68 | } |
| 69 | |
| 70 | static DesignwarePCIEHost * |
| 71 | designware_pcie_root_to_host(DesignwarePCIERoot *root) |
| 72 | { |
| 73 | BusState *bus = qdev_get_parent_bus(DEVICE(root)); |
| 74 | return DESIGNWARE_PCIE_HOST(bus->parent); |
| 75 | } |
| 76 | |
| 77 | static uint64_t designware_pcie_root_msi_read(void *opaque, hwaddr addr, |
| 78 | unsigned size) |
| 79 | { |
| 80 | /* |
| 81 | * Attempts to read from the MSI address are undefined in |
| 82 | * the PCI specifications. For this hardware, the datasheet |
| 83 | * specifies that a read from the magic address is simply not |
| 84 | * intercepted by the MSI controller, and will go out to the |
| 85 | * AHB/AXI bus like any other PCI-device-initiated DMA read. |
| 86 | * This is not trivial to implement in QEMU, so since |
| 87 | * well-behaved guests won't ever ask a PCI device to DMA from |
| 88 | * this address we just log the missing functionality. |
| 89 | */ |
| 90 | qemu_log_mask(LOG_UNIMP, "%s not implemented\n", __func__); |
| 91 | return 0; |
| 92 | } |
| 93 | |
| 94 | static void designware_pcie_root_msi_write(void *opaque, hwaddr addr, |
| 95 | uint64_t val, unsigned len) |
| 96 | { |
| 97 | DesignwarePCIERoot *root = DESIGNWARE_PCIE_ROOT(opaque); |
| 98 | DesignwarePCIEHost *host = designware_pcie_root_to_host(root); |
| 99 | |
| 100 | root->msi.intr[0].status |= BIT(val) & root->msi.intr[0].enable; |
| 101 | |
| 102 | if (root->msi.intr[0].status & ~root->msi.intr[0].mask) { |
| 103 | qemu_set_irq(host->pci.msi, 1); |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | static const MemoryRegionOps designware_pci_host_msi_ops = { |
| 108 | .read = designware_pcie_root_msi_read, |
| 109 | .write = designware_pcie_root_msi_write, |
| 110 | .endianness = DEVICE_LITTLE_ENDIAN, |
| 111 | .valid = { |
| 112 | .min_access_size = 4, |
| 113 | .max_access_size = 4, |
| 114 | }, |
| 115 | }; |
| 116 | |
| 117 | static void designware_pcie_root_update_msi_mapping(DesignwarePCIERoot *root) |
| 118 | |
| 119 | { |
| 120 | MemoryRegion *mem = &root->msi.iomem; |
| 121 | const uint64_t base = root->msi.base; |
| 122 | const bool enable = root->msi.intr[0].enable; |
| 123 | |
| 124 | memory_region_set_address(mem, base); |
| 125 | memory_region_set_enabled(mem, enable); |
| 126 | } |
| 127 | |
| 128 | static DesignwarePCIEViewport * |
| 129 | designware_pcie_root_get_current_viewport(DesignwarePCIERoot *root) |
| 130 | { |
| 131 | const unsigned int idx = root->atu_viewport & 0xF; |
| 132 | const unsigned int dir = |
| 133 | !!(root->atu_viewport & DESIGNWARE_PCIE_ATU_REGION_INBOUND); |
| 134 | return &root->viewports[dir][idx]; |
| 135 | } |
| 136 | |
| 137 | static uint32_t |
| 138 | designware_pcie_root_config_read(PCIDevice *d, uint32_t address, int len) |
| 139 | { |
| 140 | DesignwarePCIERoot *root = DESIGNWARE_PCIE_ROOT(d); |
| 141 | DesignwarePCIEViewport *viewport = |
| 142 | designware_pcie_root_get_current_viewport(root); |
| 143 | |
| 144 | uint32_t val; |
| 145 | |
| 146 | switch (address) { |
| 147 | case DESIGNWARE_PCIE_PORT_LINK_CONTROL: |
| 148 | /* |
| 149 | * Linux guest uses this register only to configure number of |
| 150 | * PCIE lane (which in our case is irrelevant) and doesn't |
| 151 | * really care about the value it reads from this register |
| 152 | */ |
| 153 | val = 0xDEADBEEF; |
| 154 | break; |
| 155 | |
| 156 | case DESIGNWARE_PCIE_LINK_WIDTH_SPEED_CONTROL: |
| 157 | /* |
| 158 | * To make sure that any code in guest waiting for speed |
| 159 | * change does not time out we always report |
| 160 | * PORT_LOGIC_SPEED_CHANGE as set |
| 161 | */ |
| 162 | val = DESIGNWARE_PCIE_PORT_LOGIC_SPEED_CHANGE; |
| 163 | break; |
| 164 | |
| 165 | case DESIGNWARE_PCIE_MSI_ADDR_LO: |
| 166 | case DESIGNWARE_PCIE_MSI_ADDR_HI: |
| 167 | val = extract64(root->msi.base, |
| 168 | address == DESIGNWARE_PCIE_MSI_ADDR_LO ? 0 : 32, 32); |
| 169 | break; |
| 170 | |
| 171 | case DESIGNWARE_PCIE_MSI_INTR0_ENABLE: |
| 172 | val = root->msi.intr[0].enable; |
| 173 | break; |
| 174 | |
| 175 | case DESIGNWARE_PCIE_MSI_INTR0_MASK: |
| 176 | val = root->msi.intr[0].mask; |
| 177 | break; |
| 178 | |
| 179 | case DESIGNWARE_PCIE_MSI_INTR0_STATUS: |
| 180 | val = root->msi.intr[0].status; |
| 181 | break; |
| 182 | |
| 183 | case DESIGNWARE_PCIE_PHY_DEBUG_R1: |
| 184 | val = DESIGNWARE_PCIE_PHY_DEBUG_R1_XMLH_LINK_UP; |
| 185 | break; |
| 186 | |
| 187 | case DESIGNWARE_PCIE_ATU_VIEWPORT: |
| 188 | val = root->atu_viewport; |
| 189 | break; |
| 190 | |
| 191 | case DESIGNWARE_PCIE_ATU_LOWER_BASE: |
| 192 | case DESIGNWARE_PCIE_ATU_UPPER_BASE: |
| 193 | val = extract64(viewport->base, |
| 194 | address == DESIGNWARE_PCIE_ATU_LOWER_BASE ? 0 : 32, 32); |
| 195 | break; |
| 196 | |
| 197 | case DESIGNWARE_PCIE_ATU_LOWER_TARGET: |
| 198 | case DESIGNWARE_PCIE_ATU_UPPER_TARGET: |
| 199 | val = extract64(viewport->target, |
| 200 | address == DESIGNWARE_PCIE_ATU_LOWER_TARGET ? 0 : 32, |
| 201 | 32); |
| 202 | break; |
| 203 | |
| 204 | case DESIGNWARE_PCIE_ATU_LIMIT: |
| 205 | val = viewport->limit; |
| 206 | break; |
| 207 | |
| 208 | case DESIGNWARE_PCIE_ATU_CR1: |
| 209 | case DESIGNWARE_PCIE_ATU_CR2: |
| 210 | val = viewport->cr[(address - DESIGNWARE_PCIE_ATU_CR1) / |
| 211 | sizeof(uint32_t)]; |
| 212 | break; |
| 213 | |
| 214 | default: |
| 215 | val = pci_default_read_config(d, address, len); |
| 216 | break; |
| 217 | } |
| 218 | |
| 219 | return val; |
| 220 | } |
| 221 | |
| 222 | static uint64_t designware_pcie_root_data_access(void *opaque, hwaddr addr, |
| 223 | uint64_t *val, unsigned len) |
| 224 | { |
| 225 | DesignwarePCIEViewport *viewport = opaque; |
| 226 | DesignwarePCIERoot *root = viewport->root; |
| 227 | |
| 228 | const uint8_t busnum = DESIGNWARE_PCIE_ATU_BUS(viewport->target); |
| 229 | const uint8_t devfn = DESIGNWARE_PCIE_ATU_DEVFN(viewport->target); |
| 230 | PCIBus *pcibus = pci_get_bus(PCI_DEVICE(root)); |
| 231 | PCIDevice *pcidev = pci_find_device(pcibus, busnum, devfn); |
| 232 | |
| 233 | if (pcidev) { |
| 234 | addr &= pci_config_size(pcidev) - 1; |
| 235 | |
| 236 | if (val) { |
| 237 | pci_host_config_write_common(pcidev, addr, |
| 238 | pci_config_size(pcidev), |
| 239 | *val, len); |
| 240 | } else { |
| 241 | return pci_host_config_read_common(pcidev, addr, |
| 242 | pci_config_size(pcidev), |
| 243 | len); |
| 244 | } |
| 245 | } |
| 246 | |
| 247 | return UINT64_MAX; |
| 248 | } |
| 249 | |
| 250 | static uint64_t designware_pcie_root_data_read(void *opaque, hwaddr addr, |
| 251 | unsigned len) |
| 252 | { |
| 253 | return designware_pcie_root_data_access(opaque, addr, NULL, len); |
| 254 | } |
| 255 | |
| 256 | static void designware_pcie_root_data_write(void *opaque, hwaddr addr, |
| 257 | uint64_t val, unsigned len) |
| 258 | { |
| 259 | designware_pcie_root_data_access(opaque, addr, &val, len); |
| 260 | } |
| 261 | |
| 262 | static const MemoryRegionOps designware_pci_host_conf_ops = { |
| 263 | .read = designware_pcie_root_data_read, |
| 264 | .write = designware_pcie_root_data_write, |
| 265 | .endianness = DEVICE_LITTLE_ENDIAN, |
| 266 | .valid = { |
| 267 | .min_access_size = 1, |
| 268 | .max_access_size = 4, |
| 269 | }, |
| 270 | }; |
| 271 | |
| 272 | static void designware_pcie_update_viewport(DesignwarePCIERoot *root, |
| 273 | DesignwarePCIEViewport *viewport) |
| 274 | { |
| 275 | const uint64_t target = viewport->target; |
| 276 | const uint64_t base = viewport->base; |
| 277 | const uint64_t size = (uint64_t)viewport->limit - base + 1; |
| 278 | const bool enabled = viewport->cr[1] & DESIGNWARE_PCIE_ATU_ENABLE; |
| 279 | |
| 280 | MemoryRegion *current, *other; |
| 281 | |
| 282 | if (viewport->cr[0] == DESIGNWARE_PCIE_ATU_TYPE_MEM) { |
| 283 | current = &viewport->mem; |
| 284 | other = &viewport->cfg; |
| 285 | memory_region_set_alias_offset(current, target); |
| 286 | } else { |
| 287 | current = &viewport->cfg; |
| 288 | other = &viewport->mem; |
| 289 | } |
| 290 | |
| 291 | /* |
| 292 | * An outbound viewport can be reconfigure from being MEM to CFG, |
| 293 | * to account for that we disable the "other" memory region that |
| 294 | * becomes unused due to that fact. |
| 295 | */ |
| 296 | memory_region_set_enabled(other, false); |
| 297 | if (enabled) { |
| 298 | memory_region_set_size(current, size); |
| 299 | memory_region_set_address(current, base); |
| 300 | } |
| 301 | memory_region_set_enabled(current, enabled); |
| 302 | } |
| 303 | |
| 304 | static void designware_pcie_root_config_write(PCIDevice *d, uint32_t address, |
| 305 | uint32_t val, int len) |
| 306 | { |
| 307 | DesignwarePCIERoot *root = DESIGNWARE_PCIE_ROOT(d); |
| 308 | DesignwarePCIEHost *host = designware_pcie_root_to_host(root); |
| 309 | DesignwarePCIEViewport *viewport = |
| 310 | designware_pcie_root_get_current_viewport(root); |
| 311 | |
| 312 | switch (address) { |
| 313 | case DESIGNWARE_PCIE_PORT_LINK_CONTROL: |
| 314 | case DESIGNWARE_PCIE_LINK_WIDTH_SPEED_CONTROL: |
| 315 | case DESIGNWARE_PCIE_PHY_DEBUG_R1: |
| 316 | /* No-op */ |
| 317 | break; |
| 318 | |
| 319 | case DESIGNWARE_PCIE_MSI_ADDR_LO: |
| 320 | case DESIGNWARE_PCIE_MSI_ADDR_HI: |
| 321 | root->msi.base = deposit64(root->msi.base, |
| 322 | address == DESIGNWARE_PCIE_MSI_ADDR_LO |
| 323 | ? 0 : 32, 32, val); |
| 324 | designware_pcie_root_update_msi_mapping(root); |
| 325 | break; |
| 326 | |
| 327 | case DESIGNWARE_PCIE_MSI_INTR0_ENABLE: |
| 328 | root->msi.intr[0].enable = val; |
| 329 | designware_pcie_root_update_msi_mapping(root); |
| 330 | break; |
| 331 | |
| 332 | case DESIGNWARE_PCIE_MSI_INTR0_MASK: |
| 333 | root->msi.intr[0].mask = val; |
| 334 | break; |
| 335 | |
| 336 | case DESIGNWARE_PCIE_MSI_INTR0_STATUS: |
| 337 | root->msi.intr[0].status ^= val; |
| 338 | if (!root->msi.intr[0].status) { |
| 339 | qemu_set_irq(host->pci.msi, 0); |
| 340 | } |
| 341 | break; |
| 342 | |
| 343 | case DESIGNWARE_PCIE_ATU_VIEWPORT: |
| 344 | val &= DESIGNWARE_PCIE_ATU_REGION_INBOUND | |
| 345 | (DESIGNWARE_PCIE_NUM_VIEWPORTS - 1); |
| 346 | root->atu_viewport = val; |
| 347 | break; |
| 348 | |
| 349 | case DESIGNWARE_PCIE_ATU_LOWER_BASE: |
| 350 | case DESIGNWARE_PCIE_ATU_UPPER_BASE: |
| 351 | viewport->base = deposit64(viewport->base, |
| 352 | address == DESIGNWARE_PCIE_ATU_LOWER_BASE |
| 353 | ? 0 : 32, 32, val); |
| 354 | break; |
| 355 | |
| 356 | case DESIGNWARE_PCIE_ATU_LOWER_TARGET: |
| 357 | case DESIGNWARE_PCIE_ATU_UPPER_TARGET: |
| 358 | viewport->target = deposit64(viewport->target, |
| 359 | address == DESIGNWARE_PCIE_ATU_LOWER_TARGET |
| 360 | ? 0 : 32, 32, val); |
| 361 | break; |
| 362 | |
| 363 | case DESIGNWARE_PCIE_ATU_LIMIT: |
| 364 | viewport->limit = val; |
| 365 | break; |
| 366 | |
| 367 | case DESIGNWARE_PCIE_ATU_CR1: |
| 368 | viewport->cr[0] = val; |
| 369 | break; |
| 370 | case DESIGNWARE_PCIE_ATU_CR2: |
| 371 | viewport->cr[1] = val; |
| 372 | designware_pcie_update_viewport(root, viewport); |
| 373 | break; |
| 374 | |
| 375 | default: |
| 376 | pci_bridge_write_config(d, address, val, len); |
| 377 | break; |
| 378 | } |
| 379 | } |
| 380 | |
| 381 | static char *designware_pcie_viewport_name(const char *direction, |
| 382 | unsigned int i, |
| 383 | const char *type) |
| 384 | { |
| 385 | return g_strdup_printf("PCI %s Viewport %u [%s]", |
| 386 | direction, i, type); |
| 387 | } |
| 388 | |
| 389 | static void designware_pcie_root_realize(PCIDevice *dev, Error **errp) |
| 390 | { |
| 391 | DesignwarePCIERoot *root = DESIGNWARE_PCIE_ROOT(dev); |
| 392 | DesignwarePCIEHost *host = designware_pcie_root_to_host(root); |
| 393 | MemoryRegion *host_mem = get_system_memory(); |
| 394 | MemoryRegion *address_space = &host->pci.memory; |
| 395 | PCIBridge *br = PCI_BRIDGE(dev); |
| 396 | DesignwarePCIEViewport *viewport; |
| 397 | /* |
| 398 | * Dummy values used for initial configuration of MemoryRegions |
| 399 | * that belong to a given viewport |
| 400 | */ |
| 401 | const hwaddr dummy_offset = 0; |
| 402 | const uint64_t dummy_size = 4; |
| 403 | size_t i; |
| 404 | |
| 405 | br->bus_name = "dw-pcie"; |
| 406 | |
| 407 | pci_set_word(dev->config + PCI_COMMAND, |
| 408 | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); |
| 409 | |
| 410 | pci_config_set_interrupt_pin(dev->config, 1); |
| 411 | pci_bridge_initfn(dev, TYPE_PCIE_BUS); |
| 412 | |
| 413 | pcie_port_init_reg(dev); |
| 414 | |
| 415 | pcie_cap_init(dev, 0x70, PCI_EXP_TYPE_ROOT_PORT, |
| 416 | 0, &error_fatal); |
| 417 | |
| 418 | msi_nonbroken = true; |
| 419 | msi_init(dev, 0x50, 32, true, true, &error_fatal); |
| 420 | |
| 421 | for (i = 0; i < DESIGNWARE_PCIE_NUM_VIEWPORTS; i++) { |
| 422 | MemoryRegion *source, *destination, *mem; |
| 423 | const char *direction; |
| 424 | char *name; |
| 425 | |
| 426 | viewport = &root->viewports[DESIGNWARE_PCIE_VIEWPORT_INBOUND][i]; |
| 427 | viewport->inbound = true; |
| 428 | viewport->base = 0x0000000000000000ULL; |
| 429 | viewport->target = 0x0000000000000000ULL; |
| 430 | viewport->limit = UINT32_MAX; |
| 431 | viewport->cr[0] = DESIGNWARE_PCIE_ATU_TYPE_MEM; |
| 432 | |
| 433 | source = &host->pci.address_space_root; |
| 434 | destination = host_mem; |
| 435 | direction = "Inbound"; |
| 436 | |
| 437 | /* |
| 438 | * Configure MemoryRegion implementing PCI -> CPU memory |
| 439 | * access |
| 440 | */ |
| 441 | mem = &viewport->mem; |
| 442 | name = designware_pcie_viewport_name(direction, i, "MEM"); |
| 443 | memory_region_init_alias(mem, OBJECT(root), name, destination, |
| 444 | dummy_offset, dummy_size); |
| 445 | memory_region_add_subregion_overlap(source, dummy_offset, mem, -1); |
| 446 | memory_region_set_enabled(mem, false); |
| 447 | g_free(name); |
| 448 | |
| 449 | viewport = &root->viewports[DESIGNWARE_PCIE_VIEWPORT_OUTBOUND][i]; |
| 450 | viewport->root = root; |
| 451 | viewport->inbound = false; |
| 452 | viewport->base = 0x0000000000000000ULL; |
| 453 | viewport->target = 0x0000000000000000ULL; |
| 454 | viewport->limit = UINT32_MAX; |
| 455 | viewport->cr[0] = DESIGNWARE_PCIE_ATU_TYPE_MEM; |
| 456 | |
| 457 | destination = &host->pci.memory; |
| 458 | direction = "Outbound"; |
| 459 | source = host_mem; |
| 460 | |
| 461 | /* |
| 462 | * Configure MemoryRegion implementing CPU -> PCI memory |
| 463 | * access |
| 464 | */ |
| 465 | mem = &viewport->mem; |
| 466 | name = designware_pcie_viewport_name(direction, i, "MEM"); |
| 467 | memory_region_init_alias(mem, OBJECT(root), name, destination, |
| 468 | dummy_offset, dummy_size); |
| 469 | memory_region_add_subregion(source, dummy_offset, mem); |
| 470 | memory_region_set_enabled(mem, false); |
| 471 | g_free(name); |
| 472 | |
| 473 | /* |
| 474 | * Configure MemoryRegion implementing access to configuration |
| 475 | * space |
| 476 | */ |
| 477 | mem = &viewport->cfg; |
| 478 | name = designware_pcie_viewport_name(direction, i, "CFG"); |
| 479 | memory_region_init_io(&viewport->cfg, OBJECT(root), |
| 480 | &designware_pci_host_conf_ops, |
| 481 | viewport, name, dummy_size); |
| 482 | memory_region_add_subregion(source, dummy_offset, mem); |
| 483 | memory_region_set_enabled(mem, false); |
| 484 | g_free(name); |
| 485 | } |
| 486 | |
| 487 | /* |
| 488 | * If no inbound iATU windows are configured, HW defaults to |
| 489 | * letting inbound TLPs to pass in. We emulate that by explicitly |
| 490 | * configuring first inbound window to cover all of target's |
| 491 | * address space. |
| 492 | * |
| 493 | * NOTE: This will not work correctly for the case when first |
| 494 | * configured inbound window is window 0 |
| 495 | */ |
| 496 | viewport = &root->viewports[DESIGNWARE_PCIE_VIEWPORT_INBOUND][0]; |
| 497 | viewport->cr[1] = DESIGNWARE_PCIE_ATU_ENABLE; |
| 498 | designware_pcie_update_viewport(root, viewport); |
| 499 | |
| 500 | memory_region_init_io(&root->msi.iomem, OBJECT(root), |
| 501 | &designware_pci_host_msi_ops, |
| 502 | root, "pcie-msi", 0x4); |
| 503 | /* |
| 504 | * We initially place MSI interrupt I/O region at address 0 and |
| 505 | * disable it. It'll be later moved to correct offset and enabled |
| 506 | * in designware_pcie_root_update_msi_mapping() as a part of |
| 507 | * initialization done by guest OS |
| 508 | */ |
| 509 | memory_region_add_subregion(address_space, dummy_offset, &root->msi.iomem); |
| 510 | memory_region_set_enabled(&root->msi.iomem, false); |
| 511 | } |
| 512 | |
| 513 | static void designware_pcie_set_irq(void *opaque, int irq_num, int level) |
| 514 | { |
| 515 | DesignwarePCIEHost *host = DESIGNWARE_PCIE_HOST(opaque); |
| 516 | |
| 517 | qemu_set_irq(host->pci.irqs[irq_num], level); |
| 518 | } |
| 519 | |
| 520 | static const char * |
| 521 | designware_pcie_host_root_bus_path(PCIHostState *host_bridge, PCIBus *rootbus) |
| 522 | { |
| 523 | return "0000:00"; |
| 524 | } |
| 525 | |
| 526 | static const VMStateDescription vmstate_designware_pcie_msi_bank = { |
| 527 | .name = "designware-pcie-msi-bank", |
| 528 | .version_id = 1, |
| 529 | .minimum_version_id = 1, |
| 530 | .fields = (const VMStateField[]) { |
| 531 | VMSTATE_UINT32(enable, DesignwarePCIEMSIBank), |
| 532 | VMSTATE_UINT32(mask, DesignwarePCIEMSIBank), |
| 533 | VMSTATE_UINT32(status, DesignwarePCIEMSIBank), |
| 534 | VMSTATE_END_OF_LIST() |
| 535 | } |
| 536 | }; |
| 537 | |
| 538 | static const VMStateDescription vmstate_designware_pcie_msi = { |
| 539 | .name = "designware-pcie-msi", |
| 540 | .version_id = 1, |
| 541 | .minimum_version_id = 1, |
| 542 | .fields = (const VMStateField[]) { |
| 543 | VMSTATE_UINT64(base, DesignwarePCIEMSI), |
| 544 | VMSTATE_STRUCT_ARRAY(intr, |
| 545 | DesignwarePCIEMSI, |
| 546 | DESIGNWARE_PCIE_NUM_MSI_BANKS, |
| 547 | 1, |
| 548 | vmstate_designware_pcie_msi_bank, |
| 549 | DesignwarePCIEMSIBank), |
| 550 | VMSTATE_END_OF_LIST() |
| 551 | } |
| 552 | }; |
| 553 | |
| 554 | static const VMStateDescription vmstate_designware_pcie_viewport = { |
| 555 | .name = "designware-pcie-viewport", |
| 556 | .version_id = 1, |
| 557 | .minimum_version_id = 1, |
| 558 | .fields = (const VMStateField[]) { |
| 559 | VMSTATE_UINT64(base, DesignwarePCIEViewport), |
| 560 | VMSTATE_UINT64(target, DesignwarePCIEViewport), |
| 561 | VMSTATE_UINT32(limit, DesignwarePCIEViewport), |
| 562 | VMSTATE_UINT32_ARRAY(cr, DesignwarePCIEViewport, 2), |
| 563 | VMSTATE_END_OF_LIST() |
| 564 | } |
| 565 | }; |
| 566 | |
| 567 | static const VMStateDescription vmstate_designware_pcie_root = { |
| 568 | .name = "designware-pcie-root", |
| 569 | .version_id = 1, |
| 570 | .minimum_version_id = 1, |
| 571 | .fields = (const VMStateField[]) { |
| 572 | VMSTATE_PCI_DEVICE(parent_obj, PCIBridge), |
| 573 | VMSTATE_UINT32(atu_viewport, DesignwarePCIERoot), |
| 574 | VMSTATE_STRUCT_2DARRAY(viewports, |
| 575 | DesignwarePCIERoot, |
| 576 | 2, |
| 577 | DESIGNWARE_PCIE_NUM_VIEWPORTS, |
| 578 | 1, |
| 579 | vmstate_designware_pcie_viewport, |
| 580 | DesignwarePCIEViewport), |
| 581 | VMSTATE_STRUCT(msi, |
| 582 | DesignwarePCIERoot, |
| 583 | 1, |
| 584 | vmstate_designware_pcie_msi, |
| 585 | DesignwarePCIEMSI), |
| 586 | VMSTATE_END_OF_LIST() |
| 587 | } |
| 588 | }; |
| 589 | |
| 590 | static void designware_pcie_root_class_init(ObjectClass *klass, |
| 591 | const void *data) |
| 592 | { |
| 593 | PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
| 594 | DeviceClass *dc = DEVICE_CLASS(klass); |
| 595 | |
| 596 | k->vendor_id = PCI_VENDOR_ID_SYNOPSYS; |
| 597 | k->device_id = 0xABCD; |
| 598 | k->revision = 0; |
| 599 | k->class_id = PCI_CLASS_BRIDGE_PCI; |
| 600 | k->exit = pci_bridge_exitfn; |
| 601 | k->realize = designware_pcie_root_realize; |
| 602 | k->config_read = designware_pcie_root_config_read; |
| 603 | k->config_write = designware_pcie_root_config_write; |
| 604 | |
| 605 | device_class_set_legacy_reset(dc, pci_bridge_reset); |
| 606 | /* |
| 607 | * PCI-facing part of the host bridge, not usable without the |
| 608 | * host-facing part, which can't be device_add'ed, yet. |
| 609 | */ |
| 610 | dc->user_creatable = false; |
| 611 | dc->vmsd = &vmstate_designware_pcie_root; |
| 612 | } |
| 613 | |
| 614 | static uint64_t designware_pcie_host_mmio_read(void *opaque, hwaddr addr, |
| 615 | unsigned int size) |
| 616 | { |
| 617 | PCIHostState *pci = PCI_HOST_BRIDGE(opaque); |
| 618 | PCIDevice *device = pci_find_device(pci->bus, 0, 0); |
| 619 | |
| 620 | return pci_host_config_read_common(device, |
| 621 | addr, |
| 622 | pci_config_size(device), |
| 623 | size); |
| 624 | } |
| 625 | |
| 626 | static void designware_pcie_host_mmio_write(void *opaque, hwaddr addr, |
| 627 | uint64_t val, unsigned int size) |
| 628 | { |
| 629 | PCIHostState *pci = PCI_HOST_BRIDGE(opaque); |
| 630 | PCIDevice *device = pci_find_device(pci->bus, 0, 0); |
| 631 | |
| 632 | return pci_host_config_write_common(device, |
| 633 | addr, |
| 634 | pci_config_size(device), |
| 635 | val, size); |
| 636 | } |
| 637 | |
| 638 | static const MemoryRegionOps designware_pci_mmio_ops = { |
| 639 | .read = designware_pcie_host_mmio_read, |
| 640 | .write = designware_pcie_host_mmio_write, |
| 641 | .endianness = DEVICE_LITTLE_ENDIAN, |
| 642 | .impl = { |
| 643 | /* |
| 644 | * Our device would not work correctly if the guest was doing |
| 645 | * unaligned access. This might not be a limitation on the real |
| 646 | * device but in practice there is no reason for a guest to access |
| 647 | * this device unaligned. |
| 648 | */ |
| 649 | .min_access_size = 4, |
| 650 | .max_access_size = 4, |
| 651 | .unaligned = false, |
| 652 | }, |
| 653 | }; |
| 654 | |
| 655 | static AddressSpace *designware_pcie_host_set_iommu(PCIBus *bus, void *opaque, |
| 656 | int devfn) |
| 657 | { |
| 658 | DesignwarePCIEHost *s = DESIGNWARE_PCIE_HOST(opaque); |
| 659 | |
| 660 | return &s->pci.address_space; |
| 661 | } |
| 662 | |
| 663 | static const PCIIOMMUOps designware_iommu_ops = { |
| 664 | .get_address_space = designware_pcie_host_set_iommu, |
| 665 | }; |
| 666 | |
| 667 | static void designware_pcie_host_realize(DeviceState *dev, Error **errp) |
| 668 | { |
| 669 | PCIHostState *pci = PCI_HOST_BRIDGE(dev); |
| 670 | DesignwarePCIEHost *s = DESIGNWARE_PCIE_HOST(dev); |
| 671 | SysBusDevice *sbd = SYS_BUS_DEVICE(dev); |
| 672 | size_t i; |
| 673 | |
| 674 | for (i = 0; i < ARRAY_SIZE(s->pci.irqs); i++) { |
| 675 | sysbus_init_irq(sbd, &s->pci.irqs[i]); |
| 676 | } |
| 677 | sysbus_init_irq(sbd, &s->pci.msi); |
| 678 | |
| 679 | memory_region_init_io(&s->mmio, |
| 680 | OBJECT(s), |
| 681 | &designware_pci_mmio_ops, |
| 682 | s, |
| 683 | "pcie.reg", 4 * 1024); |
| 684 | sysbus_init_mmio(sbd, &s->mmio); |
| 685 | |
| 686 | memory_region_init(&s->pci.io, OBJECT(s), "pcie-pio", 16); |
| 687 | memory_region_init(&s->pci.memory, OBJECT(s), |
| 688 | "pcie-bus-memory", |
| 689 | UINT64_MAX); |
| 690 | |
| 691 | pci->bus = pci_register_root_bus(dev, "pcie", |
| 692 | designware_pcie_set_irq, |
| 693 | pci_swizzle_map_irq_fn, |
| 694 | s, |
| 695 | &s->pci.memory, |
| 696 | &s->pci.io, |
| 697 | 0, 4, |
| 698 | TYPE_DESIGNWARE_PCIE_ROOT_BUS); |
| 699 | pci->bus->flags |= PCI_BUS_EXTENDED_CONFIG_SPACE; |
| 700 | |
| 701 | memory_region_init(&s->pci.address_space_root, |
| 702 | OBJECT(s), |
| 703 | "pcie-bus-address-space-root", |
| 704 | UINT64_MAX); |
| 705 | memory_region_add_subregion(&s->pci.address_space_root, |
| 706 | 0x0, &s->pci.memory); |
| 707 | address_space_init(&s->pci.address_space, |
| 708 | &s->pci.address_space_root, |
| 709 | "pcie-bus-address-space"); |
| 710 | pci_setup_iommu(pci->bus, &designware_iommu_ops, s); |
| 711 | |
| 712 | qdev_realize(DEVICE(&s->root), BUS(pci->bus), &error_fatal); |
| 713 | } |
| 714 | |
| 715 | static const VMStateDescription vmstate_designware_pcie_host = { |
| 716 | .name = "designware-pcie-host", |
| 717 | .version_id = 1, |
| 718 | .minimum_version_id = 1, |
| 719 | .fields = (const VMStateField[]) { |
| 720 | VMSTATE_STRUCT(root, |
| 721 | DesignwarePCIEHost, |
| 722 | 1, |
| 723 | vmstate_designware_pcie_root, |
| 724 | DesignwarePCIERoot), |
| 725 | VMSTATE_END_OF_LIST() |
| 726 | } |
| 727 | }; |
| 728 | |
| 729 | static void designware_pcie_host_class_init(ObjectClass *klass, |
| 730 | const void *data) |
| 731 | { |
| 732 | DeviceClass *dc = DEVICE_CLASS(klass); |
| 733 | PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass); |
| 734 | |
| 735 | hc->root_bus_path = designware_pcie_host_root_bus_path; |
| 736 | dc->realize = designware_pcie_host_realize; |
| 737 | dc->fw_name = "pci"; |
| 738 | dc->vmsd = &vmstate_designware_pcie_host; |
| 739 | } |
| 740 | |
| 741 | static void designware_pcie_host_init(Object *obj) |
| 742 | { |
| 743 | DesignwarePCIEHost *s = DESIGNWARE_PCIE_HOST(obj); |
| 744 | DesignwarePCIERoot *root = &s->root; |
| 745 | |
| 746 | object_initialize_child(obj, "root", root, TYPE_DESIGNWARE_PCIE_ROOT); |
| 747 | qdev_prop_set_int32(DEVICE(root), "addr", PCI_DEVFN(0, 0)); |
| 748 | qdev_prop_set_bit(DEVICE(root), "multifunction", false); |
| 749 | } |
| 750 | |
| 751 | static const TypeInfo designware_pcie_types[] = { |
| 752 | { |
| 753 | .name = TYPE_DESIGNWARE_PCIE_ROOT_BUS, |
| 754 | .parent = TYPE_PCIE_BUS, |
| 755 | .instance_size = sizeof(DesignwarePCIERootBus), |
| 756 | .class_init = designware_pcie_root_bus_class_init, |
| 757 | }, { |
| 758 | .name = TYPE_DESIGNWARE_PCIE_HOST, |
| 759 | .parent = TYPE_PCI_HOST_BRIDGE, |
| 760 | .instance_size = sizeof(DesignwarePCIEHost), |
| 761 | .instance_init = designware_pcie_host_init, |
| 762 | .class_init = designware_pcie_host_class_init, |
| 763 | }, { |
| 764 | .name = TYPE_DESIGNWARE_PCIE_ROOT, |
| 765 | .parent = TYPE_PCI_BRIDGE, |
| 766 | .instance_size = sizeof(DesignwarePCIERoot), |
| 767 | .class_init = designware_pcie_root_class_init, |
| 768 | .interfaces = (const InterfaceInfo[]) { |
| 769 | { INTERFACE_PCIE_DEVICE }, |
| 770 | { } |
| 771 | }, |
| 772 | }, |
| 773 | }; |
| 774 | |
| 775 | DEFINE_TYPES(designware_pcie_types) |