1 /*- 2 * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com> 3 * Copyright (c) 2014,2016 The FreeBSD Foundation 4 * All rights reserved. 5 * 6 * This software was developed by Andrew Turner under 7 * the sponsorship of the FreeBSD Foundation. 8 * 9 * This software was developed by Semihalf under 10 * the sponsorship of the FreeBSD Foundation. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 /* Generic ECAM PCIe driver FDT attachment */ 35 36 #include <sys/cdefs.h> 37 #include "opt_platform.h" 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/bus.h> 42 #include <sys/kernel.h> 43 #include <sys/malloc.h> 44 #include <sys/module.h> 45 #include <sys/rman.h> 46 47 #if defined(INTRNG) 48 #include <machine/intr.h> 49 #endif 50 51 #include <dev/ofw/openfirm.h> 52 #include <dev/ofw/ofw_bus.h> 53 #include <dev/ofw/ofw_bus_subr.h> 54 #include <dev/ofw/ofw_pci.h> 55 56 #include <dev/pci/pcivar.h> 57 #include <dev/pci/pcireg.h> 58 #include <dev/pci/pcib_private.h> 59 #include <dev/pci/pci_host_generic.h> 60 #include <dev/pci/pci_host_generic_fdt.h> 61 62 #include <machine/intr.h> 63 64 #include "pcib_if.h" 65 66 #define SPACE_CODE_SHIFT 24 67 #define SPACE_CODE_MASK 0x3 68 #define SPACE_CODE_IO_SPACE 0x1 69 #define PROPS_CELL_SIZE 1 70 #define PCI_ADDR_CELL_SIZE 2 71 72 struct pci_ofw_devinfo { 73 STAILQ_ENTRY(pci_ofw_devinfo) pci_ofw_link; 74 struct ofw_bus_devinfo di_dinfo; 75 uint8_t slot; 76 uint8_t func; 77 uint8_t bus; 78 }; 79 80 /* Forward prototypes */ 81 82 static int generic_pcie_fdt_probe(device_t dev); 83 static int parse_pci_mem_ranges(device_t, struct generic_pcie_core_softc *); 84 static int generic_pcie_ofw_bus_attach(device_t); 85 static const struct ofw_bus_devinfo *generic_pcie_ofw_get_devinfo(device_t, 86 device_t); 87 88 static int 89 generic_pcie_fdt_probe(device_t dev) 90 { 91 92 if (!ofw_bus_status_okay(dev)) 93 return (ENXIO); 94 95 if (ofw_bus_is_compatible(dev, "pci-host-ecam-generic")) { 96 device_set_desc(dev, "Generic PCI host controller"); 97 return (BUS_PROBE_GENERIC); 98 } 99 if (ofw_bus_is_compatible(dev, "arm,gem5_pcie")) { 100 device_set_desc(dev, "GEM5 PCIe host controller"); 101 return (BUS_PROBE_DEFAULT); 102 } 103 104 return (ENXIO); 105 } 106 107 int 108 pci_host_generic_setup_fdt(device_t dev) 109 { 110 struct generic_pcie_fdt_softc *sc; 111 phandle_t node; 112 int error; 113 114 sc = device_get_softc(dev); 115 116 STAILQ_INIT(&sc->pci_ofw_devlist); 117 118 /* Retrieve 'ranges' property from FDT */ 119 if (bootverbose) 120 device_printf(dev, "parsing FDT for ECAM%d:\n", sc->base.ecam); 121 if (parse_pci_mem_ranges(dev, &sc->base)) 122 return (ENXIO); 123 124 /* Attach OFW bus */ 125 if (generic_pcie_ofw_bus_attach(dev) != 0) 126 return (ENXIO); 127 128 node = ofw_bus_get_node(dev); 129 if (sc->base.coherent == 0) { 130 sc->base.coherent = OF_hasprop(node, "dma-coherent"); 131 } 132 if (bootverbose) 133 device_printf(dev, "Bus is%s cache-coherent\n", 134 sc->base.coherent ? "" : " not"); 135 136 /* TODO parse FDT bus ranges */ 137 sc->base.bus_start = 0; 138 sc->base.bus_end = 0xFF; 139 140 /* 141 * ofw_pcib uses device unit as PCI domain number. 142 * Do the same. Some boards have multiple RCs handled 143 * by different drivers, this ensures that there are 144 * no collisions. 145 */ 146 sc->base.ecam = device_get_unit(dev); 147 148 error = pci_host_generic_core_attach(dev); 149 if (error != 0) 150 return (error); 151 152 if (ofw_bus_is_compatible(dev, "marvell,armada8k-pcie-ecam") || 153 ofw_bus_is_compatible(dev, "socionext,synquacer-pcie-ecam") || 154 ofw_bus_is_compatible(dev, "snps,dw-pcie-ecam")) { 155 device_set_desc(dev, "Synopsys DesignWare PCIe Controller"); 156 sc->base.quirks |= PCIE_ECAM_DESIGNWARE_QUIRK; 157 } 158 159 ofw_bus_setup_iinfo(node, &sc->pci_iinfo, sizeof(cell_t)); 160 161 return (0); 162 } 163 164 int 165 pci_host_generic_fdt_attach(device_t dev) 166 { 167 int error; 168 169 error = pci_host_generic_setup_fdt(dev); 170 if (error != 0) 171 return (error); 172 173 device_add_child(dev, "pci", DEVICE_UNIT_ANY); 174 bus_attach_children(dev); 175 return (0); 176 } 177 178 static int 179 parse_pci_mem_ranges(device_t dev, struct generic_pcie_core_softc *sc) 180 { 181 pcell_t pci_addr_cells, parent_addr_cells; 182 pcell_t attributes, size_cells; 183 cell_t *base_ranges; 184 int nbase_ranges; 185 phandle_t node; 186 int i, j, k; 187 188 node = ofw_bus_get_node(dev); 189 190 OF_getencprop(node, "#address-cells", &pci_addr_cells, 191 sizeof(pci_addr_cells)); 192 OF_getencprop(node, "#size-cells", &size_cells, 193 sizeof(size_cells)); 194 OF_getencprop(OF_parent(node), "#address-cells", &parent_addr_cells, 195 sizeof(parent_addr_cells)); 196 197 if (parent_addr_cells > 2 || pci_addr_cells != 3 || size_cells > 2) { 198 device_printf(dev, 199 "Unexpected number of address or size cells in FDT\n"); 200 return (ENXIO); 201 } 202 203 nbase_ranges = OF_getproplen(node, "ranges"); 204 sc->nranges = nbase_ranges / sizeof(cell_t) / 205 (parent_addr_cells + pci_addr_cells + size_cells); 206 base_ranges = malloc(nbase_ranges, M_DEVBUF, M_WAITOK); 207 OF_getencprop(node, "ranges", base_ranges, nbase_ranges); 208 209 for (i = 0, j = 0; i < sc->nranges; i++) { 210 attributes = (base_ranges[j++] >> SPACE_CODE_SHIFT) & \ 211 SPACE_CODE_MASK; 212 if (attributes == SPACE_CODE_IO_SPACE) { 213 sc->ranges[i].flags |= FLAG_TYPE_IO; 214 } else { 215 sc->ranges[i].flags |= FLAG_TYPE_MEM; 216 } 217 218 sc->ranges[i].pci_base = 0; 219 for (k = 0; k < (pci_addr_cells - 1); k++) { 220 sc->ranges[i].pci_base <<= 32; 221 sc->ranges[i].pci_base |= base_ranges[j++]; 222 } 223 sc->ranges[i].phys_base = 0; 224 for (k = 0; k < parent_addr_cells; k++) { 225 sc->ranges[i].phys_base <<= 32; 226 sc->ranges[i].phys_base |= base_ranges[j++]; 227 } 228 sc->ranges[i].size = 0; 229 for (k = 0; k < size_cells; k++) { 230 sc->ranges[i].size <<= 32; 231 sc->ranges[i].size |= base_ranges[j++]; 232 } 233 } 234 235 for (; i < MAX_RANGES_TUPLES; i++) { 236 /* zero-fill remaining tuples to mark empty elements in array */ 237 sc->ranges[i].pci_base = 0; 238 sc->ranges[i].phys_base = 0; 239 sc->ranges[i].size = 0; 240 } 241 242 free(base_ranges, M_DEVBUF); 243 return (0); 244 } 245 246 static int 247 generic_pcie_fdt_route_interrupt(device_t bus, device_t dev, int pin) 248 { 249 struct generic_pcie_fdt_softc *sc; 250 struct ofw_pci_register reg; 251 uint32_t pintr, mintr[4]; 252 phandle_t iparent; 253 int intrcells; 254 255 sc = device_get_softc(bus); 256 pintr = pin; 257 258 bzero(®, sizeof(reg)); 259 reg.phys_hi = (pci_get_bus(dev) << OFW_PCI_PHYS_HI_BUSSHIFT) | 260 (pci_get_slot(dev) << OFW_PCI_PHYS_HI_DEVICESHIFT) | 261 (pci_get_function(dev) << OFW_PCI_PHYS_HI_FUNCTIONSHIFT); 262 263 intrcells = ofw_bus_lookup_imap(ofw_bus_get_node(dev), 264 &sc->pci_iinfo, ®, sizeof(reg), &pintr, sizeof(pintr), 265 mintr, sizeof(mintr), &iparent); 266 if (intrcells) { 267 pintr = ofw_bus_map_intr(dev, iparent, intrcells, mintr); 268 return (pintr); 269 } 270 271 device_printf(bus, "could not route pin %d for device %d.%d\n", 272 pin, pci_get_slot(dev), pci_get_function(dev)); 273 return (PCI_INVALID_IRQ); 274 } 275 276 static int 277 generic_pcie_fdt_alloc_msi(device_t pci, device_t child, int count, 278 int maxcount, int *irqs) 279 { 280 #if defined(INTRNG) 281 phandle_t msi_parent; 282 int err; 283 284 err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child), 285 &msi_parent, NULL); 286 if (err != 0) 287 return (err); 288 return (intr_alloc_msi(pci, child, msi_parent, count, maxcount, 289 irqs)); 290 #else 291 return (ENXIO); 292 #endif 293 } 294 295 static int 296 generic_pcie_fdt_release_msi(device_t pci, device_t child, int count, int *irqs) 297 { 298 #if defined(INTRNG) 299 phandle_t msi_parent; 300 int err; 301 302 err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child), 303 &msi_parent, NULL); 304 if (err != 0) 305 return (err); 306 return (intr_release_msi(pci, child, msi_parent, count, irqs)); 307 #else 308 return (ENXIO); 309 #endif 310 } 311 312 static int 313 generic_pcie_fdt_map_msi(device_t pci, device_t child, int irq, uint64_t *addr, 314 uint32_t *data) 315 { 316 #if defined(INTRNG) 317 phandle_t msi_parent; 318 int err; 319 320 err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child), 321 &msi_parent, NULL); 322 if (err != 0) 323 return (err); 324 return (intr_map_msi(pci, child, msi_parent, irq, addr, data)); 325 #else 326 return (ENXIO); 327 #endif 328 } 329 330 static int 331 generic_pcie_fdt_alloc_msix(device_t pci, device_t child, int *irq) 332 { 333 #if defined(INTRNG) 334 phandle_t msi_parent; 335 int err; 336 337 err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child), 338 &msi_parent, NULL); 339 if (err != 0) 340 return (err); 341 return (intr_alloc_msix(pci, child, msi_parent, irq)); 342 #else 343 return (ENXIO); 344 #endif 345 } 346 347 static int 348 generic_pcie_fdt_release_msix(device_t pci, device_t child, int irq) 349 { 350 #if defined(INTRNG) 351 phandle_t msi_parent; 352 int err; 353 354 err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child), 355 &msi_parent, NULL); 356 if (err != 0) 357 return (err); 358 return (intr_release_msix(pci, child, msi_parent, irq)); 359 #else 360 return (ENXIO); 361 #endif 362 } 363 364 static int 365 generic_pcie_get_iommu(device_t pci, device_t child, uintptr_t *id) 366 { 367 struct pci_id_ofw_iommu *iommu; 368 uint32_t iommu_rid; 369 uint32_t iommu_xref; 370 uint16_t pci_rid; 371 phandle_t node; 372 int err; 373 374 node = ofw_bus_get_node(pci); 375 pci_rid = pci_get_rid(child); 376 377 iommu = (struct pci_id_ofw_iommu *)id; 378 379 err = ofw_bus_iommu_map(node, pci_rid, &iommu_xref, &iommu_rid); 380 if (err == 0) { 381 iommu->id = iommu_rid; 382 iommu->xref = iommu_xref; 383 } 384 385 return (err); 386 } 387 388 int 389 generic_pcie_get_id(device_t pci, device_t child, enum pci_id_type type, 390 uintptr_t *id) 391 { 392 phandle_t node; 393 int err; 394 uint32_t rid; 395 uint16_t pci_rid; 396 397 if (type == PCI_ID_OFW_IOMMU) 398 return (generic_pcie_get_iommu(pci, child, id)); 399 400 if (type != PCI_ID_MSI) 401 return (pcib_get_id(pci, child, type, id)); 402 403 node = ofw_bus_get_node(pci); 404 pci_rid = pci_get_rid(child); 405 406 err = ofw_bus_msimap(node, pci_rid, NULL, &rid); 407 if (err != 0) 408 return (err); 409 *id = rid; 410 411 return (0); 412 } 413 414 static const struct ofw_bus_devinfo * 415 generic_pcie_ofw_get_devinfo(device_t bus, device_t child) 416 { 417 struct generic_pcie_fdt_softc *sc; 418 struct pci_ofw_devinfo *di; 419 uint8_t slot, func, busno; 420 421 sc = device_get_softc(bus); 422 slot = pci_get_slot(child); 423 func = pci_get_function(child); 424 busno = pci_get_bus(child); 425 426 STAILQ_FOREACH(di, &sc->pci_ofw_devlist, pci_ofw_link) 427 if (slot == di->slot && func == di->func && busno == di->bus) 428 return (&di->di_dinfo); 429 430 return (NULL); 431 } 432 433 /* Helper functions */ 434 435 static int 436 generic_pcie_ofw_bus_attach(device_t dev) 437 { 438 struct generic_pcie_fdt_softc *sc; 439 struct pci_ofw_devinfo *di; 440 phandle_t parent, node; 441 pcell_t reg[5]; 442 ssize_t len; 443 444 sc = device_get_softc(dev); 445 parent = ofw_bus_get_node(dev); 446 if (parent == 0) 447 return (0); 448 449 /* Iterate through all bus subordinates */ 450 for (node = OF_child(parent); node > 0; node = OF_peer(node)) { 451 len = OF_getencprop(node, "reg", reg, sizeof(reg)); 452 if (len != 5 * sizeof(pcell_t)) 453 continue; 454 455 /* Allocate and populate devinfo. */ 456 di = malloc(sizeof(*di), M_DEVBUF, M_WAITOK | M_ZERO); 457 if (ofw_bus_gen_setup_devinfo(&di->di_dinfo, node) != 0) { 458 free(di, M_DEVBUF); 459 continue; 460 } 461 di->func = OFW_PCI_PHYS_HI_FUNCTION(reg[0]); 462 di->slot = OFW_PCI_PHYS_HI_DEVICE(reg[0]); 463 di->bus = OFW_PCI_PHYS_HI_BUS(reg[0]); 464 STAILQ_INSERT_TAIL(&sc->pci_ofw_devlist, di, pci_ofw_link); 465 } 466 467 return (0); 468 } 469 470 static device_method_t generic_pcie_fdt_methods[] = { 471 DEVMETHOD(device_probe, generic_pcie_fdt_probe), 472 DEVMETHOD(device_attach, pci_host_generic_fdt_attach), 473 474 /* pcib interface */ 475 DEVMETHOD(pcib_route_interrupt, generic_pcie_fdt_route_interrupt), 476 DEVMETHOD(pcib_alloc_msi, generic_pcie_fdt_alloc_msi), 477 DEVMETHOD(pcib_release_msi, generic_pcie_fdt_release_msi), 478 DEVMETHOD(pcib_alloc_msix, generic_pcie_fdt_alloc_msix), 479 DEVMETHOD(pcib_release_msix, generic_pcie_fdt_release_msix), 480 DEVMETHOD(pcib_map_msi, generic_pcie_fdt_map_msi), 481 DEVMETHOD(pcib_get_id, generic_pcie_get_id), 482 DEVMETHOD(pcib_request_feature, pcib_request_feature_allow), 483 484 DEVMETHOD(ofw_bus_get_devinfo, generic_pcie_ofw_get_devinfo), 485 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 486 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 487 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 488 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 489 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 490 491 DEVMETHOD_END 492 }; 493 494 DEFINE_CLASS_1(pcib, generic_pcie_fdt_driver, generic_pcie_fdt_methods, 495 sizeof(struct generic_pcie_fdt_softc), generic_pcie_core_driver); 496 497 DRIVER_MODULE(pcib, simplebus, generic_pcie_fdt_driver, 0, 0); 498 DRIVER_MODULE(pcib, ofwbus, generic_pcie_fdt_driver, 0, 0); 499