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 return (bus_generic_attach(dev)); 175 } 176 177 static int 178 parse_pci_mem_ranges(device_t dev, struct generic_pcie_core_softc *sc) 179 { 180 pcell_t pci_addr_cells, parent_addr_cells; 181 pcell_t attributes, size_cells; 182 cell_t *base_ranges; 183 int nbase_ranges; 184 phandle_t node; 185 int i, j, k; 186 187 node = ofw_bus_get_node(dev); 188 189 OF_getencprop(node, "#address-cells", &pci_addr_cells, 190 sizeof(pci_addr_cells)); 191 OF_getencprop(node, "#size-cells", &size_cells, 192 sizeof(size_cells)); 193 OF_getencprop(OF_parent(node), "#address-cells", &parent_addr_cells, 194 sizeof(parent_addr_cells)); 195 196 if (parent_addr_cells > 2 || pci_addr_cells != 3 || size_cells > 2) { 197 device_printf(dev, 198 "Unexpected number of address or size cells in FDT\n"); 199 return (ENXIO); 200 } 201 202 nbase_ranges = OF_getproplen(node, "ranges"); 203 sc->nranges = nbase_ranges / sizeof(cell_t) / 204 (parent_addr_cells + pci_addr_cells + size_cells); 205 base_ranges = malloc(nbase_ranges, M_DEVBUF, M_WAITOK); 206 OF_getencprop(node, "ranges", base_ranges, nbase_ranges); 207 208 for (i = 0, j = 0; i < sc->nranges; i++) { 209 attributes = (base_ranges[j++] >> SPACE_CODE_SHIFT) & \ 210 SPACE_CODE_MASK; 211 if (attributes == SPACE_CODE_IO_SPACE) { 212 sc->ranges[i].flags |= FLAG_TYPE_IO; 213 } else { 214 sc->ranges[i].flags |= FLAG_TYPE_MEM; 215 } 216 217 sc->ranges[i].pci_base = 0; 218 for (k = 0; k < (pci_addr_cells - 1); k++) { 219 sc->ranges[i].pci_base <<= 32; 220 sc->ranges[i].pci_base |= base_ranges[j++]; 221 } 222 sc->ranges[i].phys_base = 0; 223 for (k = 0; k < parent_addr_cells; k++) { 224 sc->ranges[i].phys_base <<= 32; 225 sc->ranges[i].phys_base |= base_ranges[j++]; 226 } 227 sc->ranges[i].size = 0; 228 for (k = 0; k < size_cells; k++) { 229 sc->ranges[i].size <<= 32; 230 sc->ranges[i].size |= base_ranges[j++]; 231 } 232 } 233 234 for (; i < MAX_RANGES_TUPLES; i++) { 235 /* zero-fill remaining tuples to mark empty elements in array */ 236 sc->ranges[i].pci_base = 0; 237 sc->ranges[i].phys_base = 0; 238 sc->ranges[i].size = 0; 239 } 240 241 free(base_ranges, M_DEVBUF); 242 return (0); 243 } 244 245 static int 246 generic_pcie_fdt_route_interrupt(device_t bus, device_t dev, int pin) 247 { 248 struct generic_pcie_fdt_softc *sc; 249 struct ofw_pci_register reg; 250 uint32_t pintr, mintr[4]; 251 phandle_t iparent; 252 int intrcells; 253 254 sc = device_get_softc(bus); 255 pintr = pin; 256 257 bzero(®, sizeof(reg)); 258 reg.phys_hi = (pci_get_bus(dev) << OFW_PCI_PHYS_HI_BUSSHIFT) | 259 (pci_get_slot(dev) << OFW_PCI_PHYS_HI_DEVICESHIFT) | 260 (pci_get_function(dev) << OFW_PCI_PHYS_HI_FUNCTIONSHIFT); 261 262 intrcells = ofw_bus_lookup_imap(ofw_bus_get_node(dev), 263 &sc->pci_iinfo, ®, sizeof(reg), &pintr, sizeof(pintr), 264 mintr, sizeof(mintr), &iparent); 265 if (intrcells) { 266 pintr = ofw_bus_map_intr(dev, iparent, intrcells, mintr); 267 return (pintr); 268 } 269 270 device_printf(bus, "could not route pin %d for device %d.%d\n", 271 pin, pci_get_slot(dev), pci_get_function(dev)); 272 return (PCI_INVALID_IRQ); 273 } 274 275 static int 276 generic_pcie_fdt_alloc_msi(device_t pci, device_t child, int count, 277 int maxcount, int *irqs) 278 { 279 #if defined(INTRNG) 280 phandle_t msi_parent; 281 int err; 282 283 err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child), 284 &msi_parent, NULL); 285 if (err != 0) 286 return (err); 287 return (intr_alloc_msi(pci, child, msi_parent, count, maxcount, 288 irqs)); 289 #else 290 return (ENXIO); 291 #endif 292 } 293 294 static int 295 generic_pcie_fdt_release_msi(device_t pci, device_t child, int count, int *irqs) 296 { 297 #if defined(INTRNG) 298 phandle_t msi_parent; 299 int err; 300 301 err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child), 302 &msi_parent, NULL); 303 if (err != 0) 304 return (err); 305 return (intr_release_msi(pci, child, msi_parent, count, irqs)); 306 #else 307 return (ENXIO); 308 #endif 309 } 310 311 static int 312 generic_pcie_fdt_map_msi(device_t pci, device_t child, int irq, uint64_t *addr, 313 uint32_t *data) 314 { 315 #if defined(INTRNG) 316 phandle_t msi_parent; 317 int err; 318 319 err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child), 320 &msi_parent, NULL); 321 if (err != 0) 322 return (err); 323 return (intr_map_msi(pci, child, msi_parent, irq, addr, data)); 324 #else 325 return (ENXIO); 326 #endif 327 } 328 329 static int 330 generic_pcie_fdt_alloc_msix(device_t pci, device_t child, int *irq) 331 { 332 #if defined(INTRNG) 333 phandle_t msi_parent; 334 int err; 335 336 err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child), 337 &msi_parent, NULL); 338 if (err != 0) 339 return (err); 340 return (intr_alloc_msix(pci, child, msi_parent, irq)); 341 #else 342 return (ENXIO); 343 #endif 344 } 345 346 static int 347 generic_pcie_fdt_release_msix(device_t pci, device_t child, int irq) 348 { 349 #if defined(INTRNG) 350 phandle_t msi_parent; 351 int err; 352 353 err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child), 354 &msi_parent, NULL); 355 if (err != 0) 356 return (err); 357 return (intr_release_msix(pci, child, msi_parent, irq)); 358 #else 359 return (ENXIO); 360 #endif 361 } 362 363 static int 364 generic_pcie_get_iommu(device_t pci, device_t child, uintptr_t *id) 365 { 366 struct pci_id_ofw_iommu *iommu; 367 uint32_t iommu_rid; 368 uint32_t iommu_xref; 369 uint16_t pci_rid; 370 phandle_t node; 371 int err; 372 373 node = ofw_bus_get_node(pci); 374 pci_rid = pci_get_rid(child); 375 376 iommu = (struct pci_id_ofw_iommu *)id; 377 378 err = ofw_bus_iommu_map(node, pci_rid, &iommu_xref, &iommu_rid); 379 if (err == 0) { 380 iommu->id = iommu_rid; 381 iommu->xref = iommu_xref; 382 } 383 384 return (err); 385 } 386 387 int 388 generic_pcie_get_id(device_t pci, device_t child, enum pci_id_type type, 389 uintptr_t *id) 390 { 391 phandle_t node; 392 int err; 393 uint32_t rid; 394 uint16_t pci_rid; 395 396 if (type == PCI_ID_OFW_IOMMU) 397 return (generic_pcie_get_iommu(pci, child, id)); 398 399 if (type != PCI_ID_MSI) 400 return (pcib_get_id(pci, child, type, id)); 401 402 node = ofw_bus_get_node(pci); 403 pci_rid = pci_get_rid(child); 404 405 err = ofw_bus_msimap(node, pci_rid, NULL, &rid); 406 if (err != 0) 407 return (err); 408 *id = rid; 409 410 return (0); 411 } 412 413 static const struct ofw_bus_devinfo * 414 generic_pcie_ofw_get_devinfo(device_t bus, device_t child) 415 { 416 struct generic_pcie_fdt_softc *sc; 417 struct pci_ofw_devinfo *di; 418 uint8_t slot, func, busno; 419 420 sc = device_get_softc(bus); 421 slot = pci_get_slot(child); 422 func = pci_get_function(child); 423 busno = pci_get_bus(child); 424 425 STAILQ_FOREACH(di, &sc->pci_ofw_devlist, pci_ofw_link) 426 if (slot == di->slot && func == di->func && busno == di->bus) 427 return (&di->di_dinfo); 428 429 return (NULL); 430 } 431 432 /* Helper functions */ 433 434 static int 435 generic_pcie_ofw_bus_attach(device_t dev) 436 { 437 struct generic_pcie_fdt_softc *sc; 438 struct pci_ofw_devinfo *di; 439 phandle_t parent, node; 440 pcell_t reg[5]; 441 ssize_t len; 442 443 sc = device_get_softc(dev); 444 parent = ofw_bus_get_node(dev); 445 if (parent == 0) 446 return (0); 447 448 /* Iterate through all bus subordinates */ 449 for (node = OF_child(parent); node > 0; node = OF_peer(node)) { 450 len = OF_getencprop(node, "reg", reg, sizeof(reg)); 451 if (len != 5 * sizeof(pcell_t)) 452 continue; 453 454 /* Allocate and populate devinfo. */ 455 di = malloc(sizeof(*di), M_DEVBUF, M_WAITOK | M_ZERO); 456 if (ofw_bus_gen_setup_devinfo(&di->di_dinfo, node) != 0) { 457 free(di, M_DEVBUF); 458 continue; 459 } 460 di->func = OFW_PCI_PHYS_HI_FUNCTION(reg[0]); 461 di->slot = OFW_PCI_PHYS_HI_DEVICE(reg[0]); 462 di->bus = OFW_PCI_PHYS_HI_BUS(reg[0]); 463 STAILQ_INSERT_TAIL(&sc->pci_ofw_devlist, di, pci_ofw_link); 464 } 465 466 return (0); 467 } 468 469 static device_method_t generic_pcie_fdt_methods[] = { 470 DEVMETHOD(device_probe, generic_pcie_fdt_probe), 471 DEVMETHOD(device_attach, pci_host_generic_fdt_attach), 472 473 /* pcib interface */ 474 DEVMETHOD(pcib_route_interrupt, generic_pcie_fdt_route_interrupt), 475 DEVMETHOD(pcib_alloc_msi, generic_pcie_fdt_alloc_msi), 476 DEVMETHOD(pcib_release_msi, generic_pcie_fdt_release_msi), 477 DEVMETHOD(pcib_alloc_msix, generic_pcie_fdt_alloc_msix), 478 DEVMETHOD(pcib_release_msix, generic_pcie_fdt_release_msix), 479 DEVMETHOD(pcib_map_msi, generic_pcie_fdt_map_msi), 480 DEVMETHOD(pcib_get_id, generic_pcie_get_id), 481 DEVMETHOD(pcib_request_feature, pcib_request_feature_allow), 482 483 DEVMETHOD(ofw_bus_get_devinfo, generic_pcie_ofw_get_devinfo), 484 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 485 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 486 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 487 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 488 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 489 490 DEVMETHOD_END 491 }; 492 493 DEFINE_CLASS_1(pcib, generic_pcie_fdt_driver, generic_pcie_fdt_methods, 494 sizeof(struct generic_pcie_fdt_softc), generic_pcie_core_driver); 495 496 DRIVER_MODULE(pcib, simplebus, generic_pcie_fdt_driver, 0, 0); 497 DRIVER_MODULE(pcib, ofwbus, generic_pcie_fdt_driver, 0, 0); 498