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sys/arm/mv/mv_pci.c
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1 /*- 2 * Copyright (c) 2008 MARVELL INTERNATIONAL LTD. 3 * Copyright (c) 2010 The FreeBSD Foundation 4 * Copyright (c) 2010-2015 Semihalf 5 * All rights reserved. 6 * 7 * Developed by Semihalf. 8 * 9 * Portions of this software were developed by Semihalf 10 * under sponsorship from 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 * 3. Neither the name of MARVELL nor the names of contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 /* 38 * Marvell integrated PCI/PCI-Express controller driver. 39 */ 40 41 #include <sys/cdefs.h> 42 __FBSDID("$FreeBSD$"); 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/lock.h> 48 #include <sys/malloc.h> 49 #include <sys/module.h> 50 #include <sys/mutex.h> 51 #include <sys/queue.h> 52 #include <sys/bus.h> 53 #include <sys/rman.h> 54 #include <sys/endian.h> 55 #include <sys/devmap.h> 56 57 #include <machine/fdt.h> 58 #include <machine/intr.h> 59 60 #include <vm/vm.h> 61 #include <vm/pmap.h> 62 63 #include <dev/fdt/fdt_common.h> 64 #include <dev/ofw/ofw_bus.h> 65 #include <dev/ofw/ofw_bus_subr.h> 66 #include <dev/ofw/ofw_pci.h> 67 #include <dev/pci/pcivar.h> 68 #include <dev/pci/pcireg.h> 69 #include <dev/pci/pcib_private.h> 70 71 #include "ofw_bus_if.h" 72 #include "pcib_if.h" 73 74 #include <machine/resource.h> 75 #include <machine/bus.h> 76 77 #include <arm/mv/mvreg.h> 78 #include <arm/mv/mvvar.h> 79 #include <arm/mv/mvwin.h> 80 81 #ifdef DEBUG 82 #define debugf(fmt, args...) do { printf(fmt,##args); } while (0) 83 #else 84 #define debugf(fmt, args...) 85 #endif 86 87 /* 88 * Code and data related to fdt-based PCI configuration. 89 * 90 * This stuff used to be in dev/fdt/fdt_pci.c and fdt_common.h, but it was 91 * always Marvell-specific so that was deleted and the code now lives here. 92 */ 93 94 struct mv_pci_range { 95 u_long base_pci; 96 u_long base_parent; 97 u_long len; 98 }; 99 100 #define FDT_RANGES_CELLS ((3 + 3 + 2) * 2) 101 102 static void 103 mv_pci_range_dump(struct mv_pci_range *range) 104 { 105 #ifdef DEBUG 106 printf("\n"); 107 printf(" base_pci = 0x%08lx\n", range->base_pci); 108 printf(" base_par = 0x%08lx\n", range->base_parent); 109 printf(" len = 0x%08lx\n", range->len); 110 #endif 111 } 112 113 static int 114 mv_pci_ranges_decode(phandle_t node, struct mv_pci_range *io_space, 115 struct mv_pci_range *mem_space) 116 { 117 pcell_t ranges[FDT_RANGES_CELLS]; 118 struct mv_pci_range *pci_space; 119 pcell_t addr_cells, size_cells, par_addr_cells; 120 pcell_t *rangesptr; 121 pcell_t cell0, cell1, cell2; 122 int tuple_size, tuples, i, rv, offset_cells, len; 123 124 /* 125 * Retrieve 'ranges' property. 126 */ 127 if ((fdt_addrsize_cells(node, &addr_cells, &size_cells)) != 0) 128 return (EINVAL); 129 if (addr_cells != 3 || size_cells != 2) 130 return (ERANGE); 131 132 par_addr_cells = fdt_parent_addr_cells(node); 133 if (par_addr_cells > 3) 134 return (ERANGE); 135 136 len = OF_getproplen(node, "ranges"); 137 if (len > sizeof(ranges)) 138 return (ENOMEM); 139 140 if (OF_getprop(node, "ranges", ranges, sizeof(ranges)) <= 0) 141 return (EINVAL); 142 143 tuple_size = sizeof(pcell_t) * (addr_cells + par_addr_cells + 144 size_cells); 145 tuples = len / tuple_size; 146 147 /* 148 * Initialize the ranges so that we don't have to worry about 149 * having them all defined in the FDT. In particular, it is 150 * perfectly fine not to want I/O space on PCI busses. 151 */ 152 bzero(io_space, sizeof(*io_space)); 153 bzero(mem_space, sizeof(*mem_space)); 154 155 rangesptr = &ranges[0]; 156 offset_cells = 0; 157 for (i = 0; i < tuples; i++) { 158 cell0 = fdt_data_get((void *)rangesptr, 1); 159 rangesptr++; 160 cell1 = fdt_data_get((void *)rangesptr, 1); 161 rangesptr++; 162 cell2 = fdt_data_get((void *)rangesptr, 1); 163 rangesptr++; 164 165 if (cell0 & 0x02000000) { 166 pci_space = mem_space; 167 } else if (cell0 & 0x01000000) { 168 pci_space = io_space; 169 } else { 170 rv = ERANGE; 171 goto out; 172 } 173 174 if (par_addr_cells == 3) { 175 /* 176 * This is a PCI subnode 'ranges'. Skip cell0 and 177 * cell1 of this entry and only use cell2. 178 */ 179 offset_cells = 2; 180 rangesptr += offset_cells; 181 } 182 183 if ((par_addr_cells - offset_cells) > 2) { 184 rv = ERANGE; 185 goto out; 186 } 187 pci_space->base_parent = fdt_data_get((void *)rangesptr, 188 par_addr_cells - offset_cells); 189 rangesptr += par_addr_cells - offset_cells; 190 191 if (size_cells > 2) { 192 rv = ERANGE; 193 goto out; 194 } 195 pci_space->len = fdt_data_get((void *)rangesptr, size_cells); 196 rangesptr += size_cells; 197 198 pci_space->base_pci = cell2; 199 } 200 rv = 0; 201 out: 202 return (rv); 203 } 204 205 static int 206 mv_pci_ranges(phandle_t node, struct mv_pci_range *io_space, 207 struct mv_pci_range *mem_space) 208 { 209 int err; 210 211 debugf("Processing PCI node: %x\n", node); 212 if ((err = mv_pci_ranges_decode(node, io_space, mem_space)) != 0) { 213 debugf("could not decode parent PCI node 'ranges'\n"); 214 return (err); 215 } 216 217 debugf("Post fixup dump:\n"); 218 mv_pci_range_dump(io_space); 219 mv_pci_range_dump(mem_space); 220 return (0); 221 } 222 223 int 224 mv_pci_devmap(phandle_t node, struct devmap_entry *devmap, vm_offset_t io_va, 225 vm_offset_t mem_va) 226 { 227 struct mv_pci_range io_space, mem_space; 228 int error; 229 230 if ((error = mv_pci_ranges_decode(node, &io_space, &mem_space)) != 0) 231 return (error); 232 233 devmap->pd_va = (io_va ? io_va : io_space.base_parent); 234 devmap->pd_pa = io_space.base_parent; 235 devmap->pd_size = io_space.len; 236 devmap++; 237 238 devmap->pd_va = (mem_va ? mem_va : mem_space.base_parent); 239 devmap->pd_pa = mem_space.base_parent; 240 devmap->pd_size = mem_space.len; 241 return (0); 242 } 243 244 /* 245 * Code and data related to the Marvell pcib driver. 246 */ 247 248 #define PCI_CFG_ENA (1U << 31) 249 #define PCI_CFG_BUS(bus) (((bus) & 0xff) << 16) 250 #define PCI_CFG_DEV(dev) (((dev) & 0x1f) << 11) 251 #define PCI_CFG_FUN(fun) (((fun) & 0x7) << 8) 252 #define PCI_CFG_PCIE_REG(reg) ((reg) & 0xfc) 253 254 #define PCI_REG_CFG_ADDR 0x0C78 255 #define PCI_REG_CFG_DATA 0x0C7C 256 257 #define PCIE_REG_CFG_ADDR 0x18F8 258 #define PCIE_REG_CFG_DATA 0x18FC 259 #define PCIE_REG_CONTROL 0x1A00 260 #define PCIE_CTRL_LINK1X 0x00000001 261 #define PCIE_REG_STATUS 0x1A04 262 #define PCIE_REG_IRQ_MASK 0x1910 263 264 #define PCIE_CONTROL_ROOT_CMPLX (1 << 1) 265 #define PCIE_CONTROL_HOT_RESET (1 << 24) 266 267 #define PCIE_LINK_TIMEOUT 1000000 268 269 #define PCIE_STATUS_LINK_DOWN 1 270 #define PCIE_STATUS_DEV_OFFS 16 271 272 /* Minimum PCI Memory and I/O allocations taken from PCI spec (in bytes) */ 273 #define PCI_MIN_IO_ALLOC 4 274 #define PCI_MIN_MEM_ALLOC 16 275 276 #define BITS_PER_UINT32 (NBBY * sizeof(uint32_t)) 277 278 struct mv_pcib_softc { 279 device_t sc_dev; 280 281 struct rman sc_mem_rman; 282 bus_addr_t sc_mem_base; 283 bus_addr_t sc_mem_size; 284 uint32_t sc_mem_map[MV_PCI_MEM_SLICE_SIZE / 285 (PCI_MIN_MEM_ALLOC * BITS_PER_UINT32)]; 286 int sc_win_target; 287 int sc_mem_win_attr; 288 289 struct rman sc_io_rman; 290 bus_addr_t sc_io_base; 291 bus_addr_t sc_io_size; 292 uint32_t sc_io_map[MV_PCI_IO_SLICE_SIZE / 293 (PCI_MIN_IO_ALLOC * BITS_PER_UINT32)]; 294 int sc_io_win_attr; 295 296 struct resource *sc_res; 297 bus_space_handle_t sc_bsh; 298 bus_space_tag_t sc_bst; 299 int sc_rid; 300 301 struct mtx sc_msi_mtx; 302 uint32_t sc_msi_bitmap; 303 304 int sc_busnr; /* Host bridge bus number */ 305 int sc_devnr; /* Host bridge device number */ 306 int sc_type; 307 int sc_mode; /* Endpoint / Root Complex */ 308 309 struct ofw_bus_iinfo sc_pci_iinfo; 310 }; 311 312 /* Local forward prototypes */ 313 static int mv_pcib_decode_win(phandle_t, struct mv_pcib_softc *); 314 static void mv_pcib_hw_cfginit(void); 315 static uint32_t mv_pcib_hw_cfgread(struct mv_pcib_softc *, u_int, u_int, 316 u_int, u_int, int); 317 static void mv_pcib_hw_cfgwrite(struct mv_pcib_softc *, u_int, u_int, 318 u_int, u_int, uint32_t, int); 319 static int mv_pcib_init(struct mv_pcib_softc *, int, int); 320 static int mv_pcib_init_all_bars(struct mv_pcib_softc *, int, int, int, int); 321 static void mv_pcib_init_bridge(struct mv_pcib_softc *, int, int, int); 322 static inline void pcib_write_irq_mask(struct mv_pcib_softc *, uint32_t); 323 static void mv_pcib_enable(struct mv_pcib_softc *, uint32_t); 324 static int mv_pcib_mem_init(struct mv_pcib_softc *); 325 326 /* Forward prototypes */ 327 static int mv_pcib_probe(device_t); 328 static int mv_pcib_attach(device_t); 329 330 static struct resource *mv_pcib_alloc_resource(device_t, device_t, int, int *, 331 rman_res_t, rman_res_t, rman_res_t, u_int); 332 static int mv_pcib_release_resource(device_t, device_t, int, int, 333 struct resource *); 334 static int mv_pcib_read_ivar(device_t, device_t, int, uintptr_t *); 335 static int mv_pcib_write_ivar(device_t, device_t, int, uintptr_t); 336 337 static int mv_pcib_maxslots(device_t); 338 static uint32_t mv_pcib_read_config(device_t, u_int, u_int, u_int, u_int, int); 339 static void mv_pcib_write_config(device_t, u_int, u_int, u_int, u_int, 340 uint32_t, int); 341 static int mv_pcib_route_interrupt(device_t, device_t, int); 342 #if defined(SOC_MV_ARMADAXP) 343 static int mv_pcib_alloc_msi(device_t, device_t, int, int, int *); 344 static int mv_pcib_map_msi(device_t, device_t, int, uint64_t *, uint32_t *); 345 static int mv_pcib_release_msi(device_t, device_t, int, int *); 346 #endif 347 348 /* 349 * Bus interface definitions. 350 */ 351 static device_method_t mv_pcib_methods[] = { 352 /* Device interface */ 353 DEVMETHOD(device_probe, mv_pcib_probe), 354 DEVMETHOD(device_attach, mv_pcib_attach), 355 356 /* Bus interface */ 357 DEVMETHOD(bus_read_ivar, mv_pcib_read_ivar), 358 DEVMETHOD(bus_write_ivar, mv_pcib_write_ivar), 359 DEVMETHOD(bus_alloc_resource, mv_pcib_alloc_resource), 360 DEVMETHOD(bus_release_resource, mv_pcib_release_resource), 361 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 362 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 363 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 364 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 365 366 /* pcib interface */ 367 DEVMETHOD(pcib_maxslots, mv_pcib_maxslots), 368 DEVMETHOD(pcib_read_config, mv_pcib_read_config), 369 DEVMETHOD(pcib_write_config, mv_pcib_write_config), 370 DEVMETHOD(pcib_route_interrupt, mv_pcib_route_interrupt), 371 372 #if defined(SOC_MV_ARMADAXP) 373 DEVMETHOD(pcib_alloc_msi, mv_pcib_alloc_msi), 374 DEVMETHOD(pcib_release_msi, mv_pcib_release_msi), 375 DEVMETHOD(pcib_map_msi, mv_pcib_map_msi), 376 #endif 377 378 /* OFW bus interface */ 379 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 380 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 381 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 382 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 383 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 384 385 DEVMETHOD_END 386 }; 387 388 static driver_t mv_pcib_driver = { 389 "pcib", 390 mv_pcib_methods, 391 sizeof(struct mv_pcib_softc), 392 }; 393 394 devclass_t pcib_devclass; 395 396 DRIVER_MODULE(pcib, ofwbus, mv_pcib_driver, pcib_devclass, 0, 0); 397 398 static struct mtx pcicfg_mtx; 399 400 static int 401 mv_pcib_probe(device_t self) 402 { 403 phandle_t node; 404 405 node = ofw_bus_get_node(self); 406 if (!fdt_is_type(node, "pci")) 407 return (ENXIO); 408 409 if (!(ofw_bus_is_compatible(self, "mrvl,pcie") || 410 ofw_bus_is_compatible(self, "mrvl,pci"))) 411 return (ENXIO); 412 413 device_set_desc(self, "Marvell Integrated PCI/PCI-E Controller"); 414 return (BUS_PROBE_DEFAULT); 415 } 416 417 static int 418 mv_pcib_attach(device_t self) 419 { 420 struct mv_pcib_softc *sc; 421 phandle_t node, parnode; 422 uint32_t val, unit; 423 int err; 424 425 sc = device_get_softc(self); 426 sc->sc_dev = self; 427 unit = fdt_get_unit(self); 428 429 430 node = ofw_bus_get_node(self); 431 parnode = OF_parent(node); 432 if (fdt_is_compatible(node, "mrvl,pcie")) { 433 sc->sc_type = MV_TYPE_PCIE; 434 sc->sc_win_target = MV_WIN_PCIE_TARGET(unit); 435 sc->sc_mem_win_attr = MV_WIN_PCIE_MEM_ATTR(unit); 436 sc->sc_io_win_attr = MV_WIN_PCIE_IO_ATTR(unit); 437 } else if (fdt_is_compatible(node, "mrvl,pci")) { 438 sc->sc_type = MV_TYPE_PCI; 439 sc->sc_win_target = MV_WIN_PCI_TARGET; 440 sc->sc_mem_win_attr = MV_WIN_PCI_MEM_ATTR; 441 sc->sc_io_win_attr = MV_WIN_PCI_IO_ATTR; 442 } else 443 return (ENXIO); 444 445 /* 446 * Retrieve our mem-mapped registers range. 447 */ 448 sc->sc_rid = 0; 449 sc->sc_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &sc->sc_rid, 450 RF_ACTIVE); 451 if (sc->sc_res == NULL) { 452 device_printf(self, "could not map memory\n"); 453 return (ENXIO); 454 } 455 sc->sc_bst = rman_get_bustag(sc->sc_res); 456 sc->sc_bsh = rman_get_bushandle(sc->sc_res); 457 458 val = bus_space_read_4(sc->sc_bst, sc->sc_bsh, PCIE_REG_CONTROL); 459 sc->sc_mode = (val & PCIE_CONTROL_ROOT_CMPLX ? MV_MODE_ROOT : 460 MV_MODE_ENDPOINT); 461 462 /* 463 * Get PCI interrupt info. 464 */ 465 if (sc->sc_mode == MV_MODE_ROOT) 466 ofw_bus_setup_iinfo(node, &sc->sc_pci_iinfo, sizeof(pcell_t)); 467 468 /* 469 * Configure decode windows for PCI(E) access. 470 */ 471 if (mv_pcib_decode_win(node, sc) != 0) 472 return (ENXIO); 473 474 mv_pcib_hw_cfginit(); 475 476 /* 477 * Enable PCIE device. 478 */ 479 mv_pcib_enable(sc, unit); 480 481 /* 482 * Memory management. 483 */ 484 err = mv_pcib_mem_init(sc); 485 if (err) 486 return (err); 487 488 if (sc->sc_mode == MV_MODE_ROOT) { 489 err = mv_pcib_init(sc, sc->sc_busnr, 490 mv_pcib_maxslots(sc->sc_dev)); 491 if (err) 492 goto error; 493 494 device_add_child(self, "pci", -1); 495 } else { 496 sc->sc_devnr = 1; 497 bus_space_write_4(sc->sc_bst, sc->sc_bsh, 498 PCIE_REG_STATUS, 1 << PCIE_STATUS_DEV_OFFS); 499 device_add_child(self, "pci_ep", -1); 500 } 501 502 mtx_init(&sc->sc_msi_mtx, "msi_mtx", NULL, MTX_DEF); 503 return (bus_generic_attach(self)); 504 505 error: 506 /* XXX SYS_RES_ should be released here */ 507 rman_fini(&sc->sc_mem_rman); 508 rman_fini(&sc->sc_io_rman); 509 510 return (err); 511 } 512 513 static void 514 mv_pcib_enable(struct mv_pcib_softc *sc, uint32_t unit) 515 { 516 uint32_t val; 517 #if !defined(SOC_MV_ARMADAXP) 518 int timeout; 519 520 /* 521 * Check if PCIE device is enabled. 522 */ 523 if (read_cpu_ctrl(CPU_CONTROL) & CPU_CONTROL_PCIE_DISABLE(unit)) { 524 write_cpu_ctrl(CPU_CONTROL, read_cpu_ctrl(CPU_CONTROL) & 525 ~(CPU_CONTROL_PCIE_DISABLE(unit))); 526 527 timeout = PCIE_LINK_TIMEOUT; 528 val = bus_space_read_4(sc->sc_bst, sc->sc_bsh, 529 PCIE_REG_STATUS); 530 while (((val & PCIE_STATUS_LINK_DOWN) == 1) && (timeout > 0)) { 531 DELAY(1000); 532 timeout -= 1000; 533 val = bus_space_read_4(sc->sc_bst, sc->sc_bsh, 534 PCIE_REG_STATUS); 535 } 536 } 537 #endif 538 539 540 if (sc->sc_mode == MV_MODE_ROOT) { 541 /* 542 * Enable PCI bridge. 543 */ 544 val = bus_space_read_4(sc->sc_bst, sc->sc_bsh, PCIR_COMMAND); 545 val |= PCIM_CMD_SERRESPEN | PCIM_CMD_BUSMASTEREN | 546 PCIM_CMD_MEMEN | PCIM_CMD_PORTEN; 547 bus_space_write_4(sc->sc_bst, sc->sc_bsh, PCIR_COMMAND, val); 548 } 549 } 550 551 static int 552 mv_pcib_mem_init(struct mv_pcib_softc *sc) 553 { 554 int err; 555 556 /* 557 * Memory management. 558 */ 559 sc->sc_mem_rman.rm_type = RMAN_ARRAY; 560 err = rman_init(&sc->sc_mem_rman); 561 if (err) 562 return (err); 563 564 sc->sc_io_rman.rm_type = RMAN_ARRAY; 565 err = rman_init(&sc->sc_io_rman); 566 if (err) { 567 rman_fini(&sc->sc_mem_rman); 568 return (err); 569 } 570 571 err = rman_manage_region(&sc->sc_mem_rman, sc->sc_mem_base, 572 sc->sc_mem_base + sc->sc_mem_size - 1); 573 if (err) 574 goto error; 575 576 err = rman_manage_region(&sc->sc_io_rman, sc->sc_io_base, 577 sc->sc_io_base + sc->sc_io_size - 1); 578 if (err) 579 goto error; 580 581 return (0); 582 583 error: 584 rman_fini(&sc->sc_mem_rman); 585 rman_fini(&sc->sc_io_rman); 586 587 return (err); 588 } 589 590 static inline uint32_t 591 pcib_bit_get(uint32_t *map, uint32_t bit) 592 { 593 uint32_t n = bit / BITS_PER_UINT32; 594 595 bit = bit % BITS_PER_UINT32; 596 return (map[n] & (1 << bit)); 597 } 598 599 static inline void 600 pcib_bit_set(uint32_t *map, uint32_t bit) 601 { 602 uint32_t n = bit / BITS_PER_UINT32; 603 604 bit = bit % BITS_PER_UINT32; 605 map[n] |= (1 << bit); 606 } 607 608 static inline uint32_t 609 pcib_map_check(uint32_t *map, uint32_t start, uint32_t bits) 610 { 611 uint32_t i; 612 613 for (i = start; i < start + bits; i++) 614 if (pcib_bit_get(map, i)) 615 return (0); 616 617 return (1); 618 } 619 620 static inline void 621 pcib_map_set(uint32_t *map, uint32_t start, uint32_t bits) 622 { 623 uint32_t i; 624 625 for (i = start; i < start + bits; i++) 626 pcib_bit_set(map, i); 627 } 628 629 /* 630 * The idea of this allocator is taken from ARM No-Cache memory 631 * management code (sys/arm/arm/vm_machdep.c). 632 */ 633 static bus_addr_t 634 pcib_alloc(struct mv_pcib_softc *sc, uint32_t smask) 635 { 636 uint32_t bits, bits_limit, i, *map, min_alloc, size; 637 bus_addr_t addr = 0; 638 bus_addr_t base; 639 640 if (smask & 1) { 641 base = sc->sc_io_base; 642 min_alloc = PCI_MIN_IO_ALLOC; 643 bits_limit = sc->sc_io_size / min_alloc; 644 map = sc->sc_io_map; 645 smask &= ~0x3; 646 } else { 647 base = sc->sc_mem_base; 648 min_alloc = PCI_MIN_MEM_ALLOC; 649 bits_limit = sc->sc_mem_size / min_alloc; 650 map = sc->sc_mem_map; 651 smask &= ~0xF; 652 } 653 654 size = ~smask + 1; 655 bits = size / min_alloc; 656 657 for (i = 0; i + bits <= bits_limit; i += bits) 658 if (pcib_map_check(map, i, bits)) { 659 pcib_map_set(map, i, bits); 660 addr = base + (i * min_alloc); 661 return (addr); 662 } 663 664 return (addr); 665 } 666 667 static int 668 mv_pcib_init_bar(struct mv_pcib_softc *sc, int bus, int slot, int func, 669 int barno) 670 { 671 uint32_t addr, bar; 672 int reg, width; 673 674 reg = PCIR_BAR(barno); 675 676 /* 677 * Need to init the BAR register with 0xffffffff before correct 678 * value can be read. 679 */ 680 mv_pcib_write_config(sc->sc_dev, bus, slot, func, reg, ~0, 4); 681 bar = mv_pcib_read_config(sc->sc_dev, bus, slot, func, reg, 4); 682 if (bar == 0) 683 return (1); 684 685 /* Calculate BAR size: 64 or 32 bit (in 32-bit units) */ 686 width = ((bar & 7) == 4) ? 2 : 1; 687 688 addr = pcib_alloc(sc, bar); 689 if (!addr) 690 return (-1); 691 692 if (bootverbose) 693 printf("PCI %u:%u:%u: reg %x: smask=%08x: addr=%08x\n", 694 bus, slot, func, reg, bar, addr); 695 696 mv_pcib_write_config(sc->sc_dev, bus, slot, func, reg, addr, 4); 697 if (width == 2) 698 mv_pcib_write_config(sc->sc_dev, bus, slot, func, reg + 4, 699 0, 4); 700 701 return (width); 702 } 703 704 static void 705 mv_pcib_init_bridge(struct mv_pcib_softc *sc, int bus, int slot, int func) 706 { 707 bus_addr_t io_base, mem_base; 708 uint32_t io_limit, mem_limit; 709 int secbus; 710 711 io_base = sc->sc_io_base; 712 io_limit = io_base + sc->sc_io_size - 1; 713 mem_base = sc->sc_mem_base; 714 mem_limit = mem_base + sc->sc_mem_size - 1; 715 716 /* Configure I/O decode registers */ 717 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_IOBASEL_1, 718 io_base >> 8, 1); 719 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_IOBASEH_1, 720 io_base >> 16, 2); 721 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_IOLIMITL_1, 722 io_limit >> 8, 1); 723 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_IOLIMITH_1, 724 io_limit >> 16, 2); 725 726 /* Configure memory decode registers */ 727 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_MEMBASE_1, 728 mem_base >> 16, 2); 729 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_MEMLIMIT_1, 730 mem_limit >> 16, 2); 731 732 /* Disable memory prefetch decode */ 733 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_PMBASEL_1, 734 0x10, 2); 735 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_PMBASEH_1, 736 0x0, 4); 737 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_PMLIMITL_1, 738 0xF, 2); 739 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_PMLIMITH_1, 740 0x0, 4); 741 742 secbus = mv_pcib_read_config(sc->sc_dev, bus, slot, func, 743 PCIR_SECBUS_1, 1); 744 745 /* Configure buses behind the bridge */ 746 mv_pcib_init(sc, secbus, PCI_SLOTMAX); 747 } 748 749 static int 750 mv_pcib_init(struct mv_pcib_softc *sc, int bus, int maxslot) 751 { 752 int slot, func, maxfunc, error; 753 uint8_t hdrtype, command, class, subclass; 754 755 for (slot = 0; slot <= maxslot; slot++) { 756 maxfunc = 0; 757 for (func = 0; func <= maxfunc; func++) { 758 hdrtype = mv_pcib_read_config(sc->sc_dev, bus, slot, 759 func, PCIR_HDRTYPE, 1); 760 761 if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE) 762 continue; 763 764 if (func == 0 && (hdrtype & PCIM_MFDEV)) 765 maxfunc = PCI_FUNCMAX; 766 767 command = mv_pcib_read_config(sc->sc_dev, bus, slot, 768 func, PCIR_COMMAND, 1); 769 command &= ~(PCIM_CMD_MEMEN | PCIM_CMD_PORTEN); 770 mv_pcib_write_config(sc->sc_dev, bus, slot, func, 771 PCIR_COMMAND, command, 1); 772 773 error = mv_pcib_init_all_bars(sc, bus, slot, func, 774 hdrtype); 775 776 if (error) 777 return (error); 778 779 command |= PCIM_CMD_BUSMASTEREN | PCIM_CMD_MEMEN | 780 PCIM_CMD_PORTEN; 781 mv_pcib_write_config(sc->sc_dev, bus, slot, func, 782 PCIR_COMMAND, command, 1); 783 784 /* Handle PCI-PCI bridges */ 785 class = mv_pcib_read_config(sc->sc_dev, bus, slot, 786 func, PCIR_CLASS, 1); 787 subclass = mv_pcib_read_config(sc->sc_dev, bus, slot, 788 func, PCIR_SUBCLASS, 1); 789 790 if (class != PCIC_BRIDGE || 791 subclass != PCIS_BRIDGE_PCI) 792 continue; 793 794 mv_pcib_init_bridge(sc, bus, slot, func); 795 } 796 } 797 798 /* Enable all ABCD interrupts */ 799 pcib_write_irq_mask(sc, (0xF << 24)); 800 801 return (0); 802 } 803 804 static int 805 mv_pcib_init_all_bars(struct mv_pcib_softc *sc, int bus, int slot, 806 int func, int hdrtype) 807 { 808 int maxbar, bar, i; 809 810 maxbar = (hdrtype & PCIM_HDRTYPE) ? 0 : 6; 811 bar = 0; 812 813 /* Program the base address registers */ 814 while (bar < maxbar) { 815 i = mv_pcib_init_bar(sc, bus, slot, func, bar); 816 bar += i; 817 if (i < 0) { 818 device_printf(sc->sc_dev, 819 "PCI IO/Memory space exhausted\n"); 820 return (ENOMEM); 821 } 822 } 823 824 return (0); 825 } 826 827 static struct resource * 828 mv_pcib_alloc_resource(device_t dev, device_t child, int type, int *rid, 829 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 830 { 831 struct mv_pcib_softc *sc = device_get_softc(dev); 832 struct rman *rm = NULL; 833 struct resource *res; 834 835 switch (type) { 836 case SYS_RES_IOPORT: 837 rm = &sc->sc_io_rman; 838 break; 839 case SYS_RES_MEMORY: 840 rm = &sc->sc_mem_rman; 841 break; 842 default: 843 return (BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, 844 type, rid, start, end, count, flags)); 845 } 846 847 if (RMAN_IS_DEFAULT_RANGE(start, end)) { 848 start = sc->sc_mem_base; 849 end = sc->sc_mem_base + sc->sc_mem_size - 1; 850 count = sc->sc_mem_size; 851 } 852 853 if ((start < sc->sc_mem_base) || (start + count - 1 != end) || 854 (end > sc->sc_mem_base + sc->sc_mem_size - 1)) 855 return (NULL); 856 857 res = rman_reserve_resource(rm, start, end, count, flags, child); 858 if (res == NULL) 859 return (NULL); 860 861 rman_set_rid(res, *rid); 862 rman_set_bustag(res, fdtbus_bs_tag); 863 rman_set_bushandle(res, start); 864 865 if (flags & RF_ACTIVE) 866 if (bus_activate_resource(child, type, *rid, res)) { 867 rman_release_resource(res); 868 return (NULL); 869 } 870 871 return (res); 872 } 873 874 static int 875 mv_pcib_release_resource(device_t dev, device_t child, int type, int rid, 876 struct resource *res) 877 { 878 879 if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY) 880 return (BUS_RELEASE_RESOURCE(device_get_parent(dev), child, 881 type, rid, res)); 882 883 return (rman_release_resource(res)); 884 } 885 886 static int 887 mv_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 888 { 889 struct mv_pcib_softc *sc = device_get_softc(dev); 890 891 switch (which) { 892 case PCIB_IVAR_BUS: 893 *result = sc->sc_busnr; 894 return (0); 895 case PCIB_IVAR_DOMAIN: 896 *result = device_get_unit(dev); 897 return (0); 898 } 899 900 return (ENOENT); 901 } 902 903 static int 904 mv_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 905 { 906 struct mv_pcib_softc *sc = device_get_softc(dev); 907 908 switch (which) { 909 case PCIB_IVAR_BUS: 910 sc->sc_busnr = value; 911 return (0); 912 } 913 914 return (ENOENT); 915 } 916 917 static inline void 918 pcib_write_irq_mask(struct mv_pcib_softc *sc, uint32_t mask) 919 { 920 921 if (sc->sc_type != MV_TYPE_PCI) 922 return; 923 924 bus_space_write_4(sc->sc_bst, sc->sc_bsh, PCIE_REG_IRQ_MASK, mask); 925 } 926 927 static void 928 mv_pcib_hw_cfginit(void) 929 { 930 static int opened = 0; 931 932 if (opened) 933 return; 934 935 mtx_init(&pcicfg_mtx, "pcicfg", NULL, MTX_SPIN); 936 opened = 1; 937 } 938 939 static uint32_t 940 mv_pcib_hw_cfgread(struct mv_pcib_softc *sc, u_int bus, u_int slot, 941 u_int func, u_int reg, int bytes) 942 { 943 uint32_t addr, data, ca, cd; 944 945 ca = (sc->sc_type != MV_TYPE_PCI) ? 946 PCIE_REG_CFG_ADDR : PCI_REG_CFG_ADDR; 947 cd = (sc->sc_type != MV_TYPE_PCI) ? 948 PCIE_REG_CFG_DATA : PCI_REG_CFG_DATA; 949 addr = PCI_CFG_ENA | PCI_CFG_BUS(bus) | PCI_CFG_DEV(slot) | 950 PCI_CFG_FUN(func) | PCI_CFG_PCIE_REG(reg); 951 952 mtx_lock_spin(&pcicfg_mtx); 953 bus_space_write_4(sc->sc_bst, sc->sc_bsh, ca, addr); 954 955 data = ~0; 956 switch (bytes) { 957 case 1: 958 data = bus_space_read_1(sc->sc_bst, sc->sc_bsh, 959 cd + (reg & 3)); 960 break; 961 case 2: 962 data = le16toh(bus_space_read_2(sc->sc_bst, sc->sc_bsh, 963 cd + (reg & 2))); 964 break; 965 case 4: 966 data = le32toh(bus_space_read_4(sc->sc_bst, sc->sc_bsh, 967 cd)); 968 break; 969 } 970 mtx_unlock_spin(&pcicfg_mtx); 971 return (data); 972 } 973 974 static void 975 mv_pcib_hw_cfgwrite(struct mv_pcib_softc *sc, u_int bus, u_int slot, 976 u_int func, u_int reg, uint32_t data, int bytes) 977 { 978 uint32_t addr, ca, cd; 979 980 ca = (sc->sc_type != MV_TYPE_PCI) ? 981 PCIE_REG_CFG_ADDR : PCI_REG_CFG_ADDR; 982 cd = (sc->sc_type != MV_TYPE_PCI) ? 983 PCIE_REG_CFG_DATA : PCI_REG_CFG_DATA; 984 addr = PCI_CFG_ENA | PCI_CFG_BUS(bus) | PCI_CFG_DEV(slot) | 985 PCI_CFG_FUN(func) | PCI_CFG_PCIE_REG(reg); 986 987 mtx_lock_spin(&pcicfg_mtx); 988 bus_space_write_4(sc->sc_bst, sc->sc_bsh, ca, addr); 989 990 switch (bytes) { 991 case 1: 992 bus_space_write_1(sc->sc_bst, sc->sc_bsh, 993 cd + (reg & 3), data); 994 break; 995 case 2: 996 bus_space_write_2(sc->sc_bst, sc->sc_bsh, 997 cd + (reg & 2), htole16(data)); 998 break; 999 case 4: 1000 bus_space_write_4(sc->sc_bst, sc->sc_bsh, 1001 cd, htole32(data)); 1002 break; 1003 } 1004 mtx_unlock_spin(&pcicfg_mtx); 1005 } 1006 1007 static int 1008 mv_pcib_maxslots(device_t dev) 1009 { 1010 struct mv_pcib_softc *sc = device_get_softc(dev); 1011 1012 return ((sc->sc_type != MV_TYPE_PCI) ? 1 : PCI_SLOTMAX); 1013 } 1014 1015 static int 1016 mv_pcib_root_slot(device_t dev, u_int bus, u_int slot, u_int func) 1017 { 1018 #if defined(SOC_MV_ARMADA38X) 1019 struct mv_pcib_softc *sc = device_get_softc(dev); 1020 uint32_t vendor, device; 1021 1022 vendor = mv_pcib_hw_cfgread(sc, bus, slot, func, PCIR_VENDOR, 1023 PCIR_VENDOR_LENGTH); 1024 device = mv_pcib_hw_cfgread(sc, bus, slot, func, PCIR_DEVICE, 1025 PCIR_DEVICE_LENGTH) & MV_DEV_FAMILY_MASK; 1026 1027 return (vendor == PCI_VENDORID_MRVL && device == MV_DEV_ARMADA38X); 1028 #else 1029 /* On platforms other than Armada38x, root link is always at slot 0 */ 1030 return (slot == 0); 1031 #endif 1032 } 1033 1034 static uint32_t 1035 mv_pcib_read_config(device_t dev, u_int bus, u_int slot, u_int func, 1036 u_int reg, int bytes) 1037 { 1038 struct mv_pcib_softc *sc = device_get_softc(dev); 1039 1040 /* Return ~0 if link is inactive or trying to read from Root */ 1041 if ((bus_space_read_4(sc->sc_bst, sc->sc_bsh, PCIE_REG_STATUS) & 1042 PCIE_STATUS_LINK_DOWN) || mv_pcib_root_slot(dev, bus, slot, func)) 1043 return (~0U); 1044 1045 return (mv_pcib_hw_cfgread(sc, bus, slot, func, reg, bytes)); 1046 } 1047 1048 static void 1049 mv_pcib_write_config(device_t dev, u_int bus, u_int slot, u_int func, 1050 u_int reg, uint32_t val, int bytes) 1051 { 1052 struct mv_pcib_softc *sc = device_get_softc(dev); 1053 1054 /* Return if link is inactive or trying to write to Root */ 1055 if ((bus_space_read_4(sc->sc_bst, sc->sc_bsh, PCIE_REG_STATUS) & 1056 PCIE_STATUS_LINK_DOWN) || mv_pcib_root_slot(dev, bus, slot, func)) 1057 return; 1058 1059 mv_pcib_hw_cfgwrite(sc, bus, slot, func, reg, val, bytes); 1060 } 1061 1062 static int 1063 mv_pcib_route_interrupt(device_t bus, device_t dev, int pin) 1064 { 1065 struct mv_pcib_softc *sc; 1066 struct ofw_pci_register reg; 1067 uint32_t pintr, mintr[4]; 1068 int icells; 1069 phandle_t iparent; 1070 1071 sc = device_get_softc(bus); 1072 pintr = pin; 1073 1074 /* Fabricate imap information in case this isn't an OFW device */ 1075 bzero(®, sizeof(reg)); 1076 reg.phys_hi = (pci_get_bus(dev) << OFW_PCI_PHYS_HI_BUSSHIFT) | 1077 (pci_get_slot(dev) << OFW_PCI_PHYS_HI_DEVICESHIFT) | 1078 (pci_get_function(dev) << OFW_PCI_PHYS_HI_FUNCTIONSHIFT); 1079 1080 icells = ofw_bus_lookup_imap(ofw_bus_get_node(dev), &sc->sc_pci_iinfo, 1081 ®, sizeof(reg), &pintr, sizeof(pintr), mintr, sizeof(mintr), 1082 &iparent); 1083 if (icells > 0) 1084 return (ofw_bus_map_intr(dev, iparent, icells, mintr)); 1085 1086 /* Maybe it's a real interrupt, not an intpin */ 1087 if (pin > 4) 1088 return (pin); 1089 1090 device_printf(bus, "could not route pin %d for device %d.%d\n", 1091 pin, pci_get_slot(dev), pci_get_function(dev)); 1092 return (PCI_INVALID_IRQ); 1093 } 1094 1095 static int 1096 mv_pcib_decode_win(phandle_t node, struct mv_pcib_softc *sc) 1097 { 1098 struct mv_pci_range io_space, mem_space; 1099 device_t dev; 1100 int error; 1101 1102 dev = sc->sc_dev; 1103 1104 if ((error = mv_pci_ranges(node, &io_space, &mem_space)) != 0) { 1105 device_printf(dev, "could not retrieve 'ranges' data\n"); 1106 return (error); 1107 } 1108 1109 /* Configure CPU decoding windows */ 1110 error = decode_win_cpu_set(sc->sc_win_target, 1111 sc->sc_io_win_attr, io_space.base_parent, io_space.len, ~0); 1112 if (error < 0) { 1113 device_printf(dev, "could not set up CPU decode " 1114 "window for PCI IO\n"); 1115 return (ENXIO); 1116 } 1117 error = decode_win_cpu_set(sc->sc_win_target, 1118 sc->sc_mem_win_attr, mem_space.base_parent, mem_space.len, 1119 mem_space.base_parent); 1120 if (error < 0) { 1121 device_printf(dev, "could not set up CPU decode " 1122 "windows for PCI MEM\n"); 1123 return (ENXIO); 1124 } 1125 1126 sc->sc_io_base = io_space.base_parent; 1127 sc->sc_io_size = io_space.len; 1128 1129 sc->sc_mem_base = mem_space.base_parent; 1130 sc->sc_mem_size = mem_space.len; 1131 1132 return (0); 1133 } 1134 1135 #if defined(SOC_MV_ARMADAXP) 1136 static int 1137 mv_pcib_map_msi(device_t dev, device_t child, int irq, uint64_t *addr, 1138 uint32_t *data) 1139 { 1140 struct mv_pcib_softc *sc; 1141 1142 sc = device_get_softc(dev); 1143 irq = irq - MSI_IRQ; 1144 1145 /* validate parameters */ 1146 if (isclr(&sc->sc_msi_bitmap, irq)) { 1147 device_printf(dev, "invalid MSI 0x%x\n", irq); 1148 return (EINVAL); 1149 } 1150 1151 mv_msi_data(irq, addr, data); 1152 1153 debugf("%s: irq: %d addr: %jx data: %x\n", 1154 __func__, irq, *addr, *data); 1155 1156 return (0); 1157 } 1158 1159 static int 1160 mv_pcib_alloc_msi(device_t dev, device_t child, int count, 1161 int maxcount __unused, int *irqs) 1162 { 1163 struct mv_pcib_softc *sc; 1164 u_int start = 0, i; 1165 1166 if (powerof2(count) == 0 || count > MSI_IRQ_NUM) 1167 return (EINVAL); 1168 1169 sc = device_get_softc(dev); 1170 mtx_lock(&sc->sc_msi_mtx); 1171 1172 for (start = 0; (start + count) < MSI_IRQ_NUM; start++) { 1173 for (i = start; i < start + count; i++) { 1174 if (isset(&sc->sc_msi_bitmap, i)) 1175 break; 1176 } 1177 if (i == start + count) 1178 break; 1179 } 1180 1181 if ((start + count) == MSI_IRQ_NUM) { 1182 mtx_unlock(&sc->sc_msi_mtx); 1183 return (ENXIO); 1184 } 1185 1186 for (i = start; i < start + count; i++) { 1187 setbit(&sc->sc_msi_bitmap, i); 1188 *irqs++ = MSI_IRQ + i; 1189 } 1190 debugf("%s: start: %x count: %x\n", __func__, start, count); 1191 1192 mtx_unlock(&sc->sc_msi_mtx); 1193 return (0); 1194 } 1195 1196 static int 1197 mv_pcib_release_msi(device_t dev, device_t child, int count, int *irqs) 1198 { 1199 struct mv_pcib_softc *sc; 1200 u_int i; 1201 1202 sc = device_get_softc(dev); 1203 mtx_lock(&sc->sc_msi_mtx); 1204 1205 for (i = 0; i < count; i++) 1206 clrbit(&sc->sc_msi_bitmap, irqs[i] - MSI_IRQ); 1207 1208 mtx_unlock(&sc->sc_msi_mtx); 1209 return (0); 1210 } 1211 #endif 1212
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