1 /*- 2 * Copyright (C) 2018 Cavium Inc. 3 * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com> 4 * Copyright (c) 2014 The FreeBSD Foundation 5 * All rights reserved. 6 * 7 * This software was developed by Semihalf under 8 * the sponsorship of the FreeBSD Foundation. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* Generic ECAM PCIe driver */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include "opt_platform.h" 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/malloc.h> 42 #include <sys/kernel.h> 43 #include <sys/rman.h> 44 #include <sys/module.h> 45 #include <sys/bus.h> 46 #include <sys/endian.h> 47 #include <sys/cpuset.h> 48 #include <sys/rwlock.h> 49 50 #include <contrib/dev/acpica/include/acpi.h> 51 #include <contrib/dev/acpica/include/accommon.h> 52 53 #include <dev/acpica/acpivar.h> 54 #include <dev/acpica/acpi_pcibvar.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 61 #include <machine/cpu.h> 62 #include <machine/bus.h> 63 #include <machine/intr.h> 64 65 #include "pcib_if.h" 66 67 int pci_host_generic_acpi_attach(device_t); 68 69 /* Assembling ECAM Configuration Address */ 70 #define PCIE_BUS_SHIFT 20 71 #define PCIE_SLOT_SHIFT 15 72 #define PCIE_FUNC_SHIFT 12 73 #define PCIE_BUS_MASK 0xFF 74 #define PCIE_SLOT_MASK 0x1F 75 #define PCIE_FUNC_MASK 0x07 76 #define PCIE_REG_MASK 0xFFF 77 78 #define PCIE_ADDR_OFFSET(bus, slot, func, reg) \ 79 ((((bus) & PCIE_BUS_MASK) << PCIE_BUS_SHIFT) | \ 80 (((slot) & PCIE_SLOT_MASK) << PCIE_SLOT_SHIFT) | \ 81 (((func) & PCIE_FUNC_MASK) << PCIE_FUNC_SHIFT) | \ 82 ((reg) & PCIE_REG_MASK)) 83 84 #define PCI_IO_WINDOW_OFFSET 0x1000 85 86 #define SPACE_CODE_SHIFT 24 87 #define SPACE_CODE_MASK 0x3 88 #define SPACE_CODE_IO_SPACE 0x1 89 #define PROPS_CELL_SIZE 1 90 #define PCI_ADDR_CELL_SIZE 2 91 92 struct generic_pcie_acpi_softc { 93 struct generic_pcie_core_softc base; 94 ACPI_BUFFER ap_prt; /* interrupt routing table */ 95 }; 96 97 /* Forward prototypes */ 98 99 static int generic_pcie_acpi_probe(device_t dev); 100 static ACPI_STATUS pci_host_generic_acpi_parse_resource(ACPI_RESOURCE *, void *); 101 static int generic_pcie_acpi_read_ivar(device_t, device_t, int, uintptr_t *); 102 103 static int 104 generic_pcie_acpi_probe(device_t dev) 105 { 106 ACPI_DEVICE_INFO *devinfo; 107 ACPI_HANDLE h; 108 int root; 109 110 if (acpi_disabled("pcib") || (h = acpi_get_handle(dev)) == NULL || 111 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 112 return (ENXIO); 113 root = (devinfo->Flags & ACPI_PCI_ROOT_BRIDGE) != 0; 114 AcpiOsFree(devinfo); 115 if (!root) 116 return (ENXIO); 117 118 device_set_desc(dev, "Generic PCI host controller"); 119 return (BUS_PROBE_GENERIC); 120 } 121 122 int 123 pci_host_generic_acpi_attach(device_t dev) 124 { 125 struct generic_pcie_acpi_softc *sc; 126 ACPI_HANDLE handle; 127 ACPI_STATUS status; 128 int error; 129 130 sc = device_get_softc(dev); 131 132 handle = acpi_get_handle(dev); 133 if (ACPI_FAILURE(acpi_GetInteger(handle, "_CCA", &sc->base.coherent))) 134 sc->base.coherent = 0; 135 if (bootverbose) 136 device_printf(dev, "Bus is%s cache-coherent\n", 137 sc->base.coherent ? "" : " not"); 138 139 if (!ACPI_FAILURE(acpi_GetInteger(handle, "_BBN", &sc->base.ecam))) 140 sc->base.ecam >>= 7; 141 else 142 sc->base.ecam = 0; 143 144 acpi_pcib_fetch_prt(dev, &sc->ap_prt); 145 146 error = pci_host_generic_core_attach(dev); 147 if (error != 0) 148 return (error); 149 150 status = AcpiWalkResources(handle, "_CRS", 151 pci_host_generic_acpi_parse_resource, (void *)dev); 152 153 if (ACPI_FAILURE(status)) 154 return (ENXIO); 155 156 device_add_child(dev, "pci", -1); 157 return (bus_generic_attach(dev)); 158 } 159 160 static ACPI_STATUS 161 pci_host_generic_acpi_parse_resource(ACPI_RESOURCE *res, void *arg) 162 { 163 device_t dev = (device_t)arg; 164 struct generic_pcie_acpi_softc *sc; 165 rman_res_t min, max; 166 int error; 167 168 switch (res->Type) { 169 case ACPI_RESOURCE_TYPE_ADDRESS32: 170 min = (rman_res_t)res->Data.Address32.Address.Minimum; 171 max = (rman_res_t)res->Data.Address32.Address.Maximum; 172 break; 173 case ACPI_RESOURCE_TYPE_ADDRESS64: 174 min = (rman_res_t)res->Data.Address64.Address.Minimum; 175 max = (rman_res_t)res->Data.Address64.Address.Maximum; 176 break; 177 default: 178 return (AE_OK); 179 } 180 181 sc = device_get_softc(dev); 182 183 error = rman_manage_region(&sc->base.mem_rman, min, max); 184 if (error) { 185 device_printf(dev, "unable to allocate %lx-%lx range\n", min, max); 186 return (AE_NOT_FOUND); 187 } 188 device_printf(dev, "allocating %lx-%lx range\n", min, max); 189 190 return (AE_OK); 191 } 192 193 static int 194 generic_pcie_acpi_read_ivar(device_t dev, device_t child, int index, 195 uintptr_t *result) 196 { 197 ACPI_HANDLE handle; 198 struct generic_pcie_acpi_softc *sc; 199 int secondary_bus; 200 201 sc = device_get_softc(dev); 202 203 if (index == PCIB_IVAR_BUS) { 204 handle = acpi_get_handle(dev); 205 if (ACPI_FAILURE(acpi_GetInteger(handle, "_BBN", &secondary_bus))) 206 secondary_bus = sc->base.ecam * 0x80; 207 *result = secondary_bus; 208 return (0); 209 } 210 211 if (index == PCIB_IVAR_DOMAIN) { 212 *result = sc->base.ecam; 213 return (0); 214 } 215 216 if (bootverbose) 217 device_printf(dev, "ERROR: Unknown index %d.\n", index); 218 return (ENOENT); 219 } 220 221 static int 222 generic_pcie_acpi_route_interrupt(device_t bus, device_t dev, int pin) 223 { 224 struct generic_pcie_acpi_softc *sc; 225 226 sc = device_get_softc(bus); 227 228 return (acpi_pcib_route_interrupt(bus, dev, pin, &sc->ap_prt)); 229 } 230 231 static struct resource * 232 pci_host_generic_acpi_alloc_resource(device_t dev, device_t child, int type, 233 int *rid, rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 234 { 235 struct resource *res = NULL; 236 237 #if defined(NEW_PCIB) && defined(PCI_RES_BUS) 238 struct generic_pcie_acpi_softc *sc; 239 240 if (type == PCI_RES_BUS) { 241 sc = device_get_softc(dev); 242 return (pci_domain_alloc_bus(sc->base.ecam, child, rid, start, 243 end, count, flags)); 244 } 245 #endif 246 247 if (type == SYS_RES_MEMORY) 248 res = pci_host_generic_core_alloc_resource(dev, child, type, 249 rid, start, end, count, flags); 250 251 if (res == NULL) 252 res = bus_generic_alloc_resource(dev, child, type, rid, start, end, 253 count, flags); 254 255 return (res); 256 } 257 258 static int 259 generic_pcie_acpi_activate_resource(device_t dev, device_t child, int type, 260 int rid, struct resource *r) 261 { 262 struct generic_pcie_acpi_softc *sc; 263 int res; 264 265 sc = device_get_softc(dev); 266 267 if ((res = rman_activate_resource(r)) != 0) 268 return (res); 269 270 res = BUS_ACTIVATE_RESOURCE(device_get_parent(dev), child, type, rid,r); 271 return (res); 272 } 273 274 static int 275 generic_pcie_acpi_deactivate_resource(device_t dev, device_t child, int type, 276 int rid, struct resource *r) 277 { 278 int res; 279 280 if ((res = rman_deactivate_resource(r)) != 0) 281 return (res); 282 283 res = BUS_DEACTIVATE_RESOURCE(device_get_parent(dev), child, type, 284 rid, r); 285 return (res); 286 } 287 288 static int 289 generic_pcie_acpi_alloc_msi(device_t pci, device_t child, int count, 290 int maxcount, int *irqs) 291 { 292 293 #if defined(INTRNG) 294 return (intr_alloc_msi(pci, child, ACPI_MSI_XREF, count, maxcount, 295 irqs)); 296 #else 297 return (ENXIO); 298 #endif 299 } 300 301 static int 302 generic_pcie_acpi_release_msi(device_t pci, device_t child, int count, 303 int *irqs) 304 { 305 306 #if defined(INTRNG) 307 return (intr_release_msi(pci, child, ACPI_MSI_XREF, count, irqs)); 308 #else 309 return (ENXIO); 310 #endif 311 } 312 313 static int 314 generic_pcie_acpi_map_msi(device_t pci, device_t child, int irq, uint64_t *addr, 315 uint32_t *data) 316 { 317 318 #if defined(INTRNG) 319 return (intr_map_msi(pci, child, ACPI_MSI_XREF, irq, addr, data)); 320 #else 321 return (ENXIO); 322 #endif 323 } 324 325 static int 326 generic_pcie_acpi_alloc_msix(device_t pci, device_t child, int *irq) 327 { 328 329 #if defined(INTRNG) 330 return (intr_alloc_msix(pci, child, ACPI_MSI_XREF, irq)); 331 #else 332 return (ENXIO); 333 #endif 334 } 335 336 static int 337 generic_pcie_acpi_release_msix(device_t pci, device_t child, int irq) 338 { 339 340 #if defined(INTRNG) 341 return (intr_release_msix(pci, child, ACPI_MSI_XREF, irq)); 342 #else 343 return (ENXIO); 344 #endif 345 } 346 347 static int 348 generic_pcie_acpi_get_id(device_t pci, device_t child, enum pci_id_type type, 349 uintptr_t *id) 350 { 351 struct generic_pcie_acpi_softc *sc; 352 int err; 353 354 /* Use the PCI RID to find the MSI ID */ 355 if (type == PCI_ID_MSI) { 356 sc = device_get_softc(pci); 357 type = PCI_ID_RID; 358 err = pcib_get_id(pci, child, type, id); 359 if (err != 0) 360 return (err); 361 *id |= sc->base.ecam << 16; 362 return (0); 363 } 364 365 return (pcib_get_id(pci, child, type, id)); 366 } 367 368 static device_method_t generic_pcie_acpi_methods[] = { 369 DEVMETHOD(device_probe, generic_pcie_acpi_probe), 370 DEVMETHOD(device_attach, pci_host_generic_acpi_attach), 371 DEVMETHOD(bus_alloc_resource, pci_host_generic_acpi_alloc_resource), 372 DEVMETHOD(bus_activate_resource, generic_pcie_acpi_activate_resource), 373 DEVMETHOD(bus_deactivate_resource, generic_pcie_acpi_deactivate_resource), 374 DEVMETHOD(bus_read_ivar, generic_pcie_acpi_read_ivar), 375 376 /* pcib interface */ 377 DEVMETHOD(pcib_route_interrupt, generic_pcie_acpi_route_interrupt), 378 DEVMETHOD(pcib_alloc_msi, generic_pcie_acpi_alloc_msi), 379 DEVMETHOD(pcib_release_msi, generic_pcie_acpi_release_msi), 380 DEVMETHOD(pcib_alloc_msix, generic_pcie_acpi_alloc_msix), 381 DEVMETHOD(pcib_release_msix, generic_pcie_acpi_release_msix), 382 DEVMETHOD(pcib_map_msi, generic_pcie_acpi_map_msi), 383 DEVMETHOD(pcib_get_id, generic_pcie_acpi_get_id), 384 385 DEVMETHOD_END 386 }; 387 388 DEFINE_CLASS_1(pcib, generic_pcie_acpi_driver, generic_pcie_acpi_methods, 389 sizeof(struct generic_pcie_acpi_softc), generic_pcie_core_driver); 390 391 static devclass_t generic_pcie_acpi_devclass; 392 393 DRIVER_MODULE(pcib, acpi, generic_pcie_acpi_driver, generic_pcie_acpi_devclass, 394 0, 0); 395