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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) 2010-2012 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: releng/10.0/sys/arm/mv/mv_pci.c 240493 2012-09-14 10:06:56Z gber $"); 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 56 #include <machine/intr.h> 57 58 #include <vm/vm.h> 59 #include <vm/pmap.h> 60 61 #include <dev/fdt/fdt_common.h> 62 #include <dev/ofw/ofw_bus.h> 63 #include <dev/ofw/ofw_bus_subr.h> 64 #include <dev/pci/pcivar.h> 65 #include <dev/pci/pcireg.h> 66 #include <dev/pci/pcib_private.h> 67 68 #include "ofw_bus_if.h" 69 #include "pcib_if.h" 70 71 #include <machine/resource.h> 72 #include <machine/bus.h> 73 74 #include <arm/mv/mvreg.h> 75 #include <arm/mv/mvvar.h> 76 #include <arm/mv/mvwin.h> 77 78 #ifdef DEBUG 79 #define debugf(fmt, args...) do { printf(fmt,##args); } while (0) 80 #else 81 #define debugf(fmt, args...) 82 #endif 83 84 #define PCI_CFG_ENA (1 << 31) 85 #define PCI_CFG_BUS(bus) (((bus) & 0xff) << 16) 86 #define PCI_CFG_DEV(dev) (((dev) & 0x1f) << 11) 87 #define PCI_CFG_FUN(fun) (((fun) & 0x7) << 8) 88 #define PCI_CFG_PCIE_REG(reg) ((reg) & 0xfc) 89 90 #define PCI_REG_CFG_ADDR 0x0C78 91 #define PCI_REG_CFG_DATA 0x0C7C 92 93 #define PCIE_REG_CFG_ADDR 0x18F8 94 #define PCIE_REG_CFG_DATA 0x18FC 95 #define PCIE_REG_CONTROL 0x1A00 96 #define PCIE_CTRL_LINK1X 0x00000001 97 #define PCIE_REG_STATUS 0x1A04 98 #define PCIE_REG_IRQ_MASK 0x1910 99 100 #define PCIE_CONTROL_ROOT_CMPLX (1 << 1) 101 #define PCIE_CONTROL_HOT_RESET (1 << 24) 102 103 #define PCIE_LINK_TIMEOUT 1000000 104 105 #define PCIE_STATUS_LINK_DOWN 1 106 #define PCIE_STATUS_DEV_OFFS 16 107 108 /* Minimum PCI Memory and I/O allocations taken from PCI spec (in bytes) */ 109 #define PCI_MIN_IO_ALLOC 4 110 #define PCI_MIN_MEM_ALLOC 16 111 112 #define BITS_PER_UINT32 (NBBY * sizeof(uint32_t)) 113 114 struct mv_pcib_softc { 115 device_t sc_dev; 116 117 struct rman sc_mem_rman; 118 bus_addr_t sc_mem_base; 119 bus_addr_t sc_mem_size; 120 uint32_t sc_mem_map[MV_PCI_MEM_SLICE_SIZE / 121 (PCI_MIN_MEM_ALLOC * BITS_PER_UINT32)]; 122 int sc_win_target; 123 int sc_mem_win_attr; 124 125 struct rman sc_io_rman; 126 bus_addr_t sc_io_base; 127 bus_addr_t sc_io_size; 128 uint32_t sc_io_map[MV_PCI_IO_SLICE_SIZE / 129 (PCI_MIN_IO_ALLOC * BITS_PER_UINT32)]; 130 int sc_io_win_attr; 131 132 struct resource *sc_res; 133 bus_space_handle_t sc_bsh; 134 bus_space_tag_t sc_bst; 135 int sc_rid; 136 137 struct mtx sc_msi_mtx; 138 uint32_t sc_msi_bitmap; 139 140 int sc_busnr; /* Host bridge bus number */ 141 int sc_devnr; /* Host bridge device number */ 142 int sc_type; 143 int sc_mode; /* Endpoint / Root Complex */ 144 145 struct fdt_pci_intr sc_intr_info; 146 }; 147 148 /* Local forward prototypes */ 149 static int mv_pcib_decode_win(phandle_t, struct mv_pcib_softc *); 150 static void mv_pcib_hw_cfginit(void); 151 static uint32_t mv_pcib_hw_cfgread(struct mv_pcib_softc *, u_int, u_int, 152 u_int, u_int, int); 153 static void mv_pcib_hw_cfgwrite(struct mv_pcib_softc *, u_int, u_int, 154 u_int, u_int, uint32_t, int); 155 static int mv_pcib_init(struct mv_pcib_softc *, int, int); 156 static int mv_pcib_init_all_bars(struct mv_pcib_softc *, int, int, int, int); 157 static void mv_pcib_init_bridge(struct mv_pcib_softc *, int, int, int); 158 static int mv_pcib_intr_info(phandle_t, struct mv_pcib_softc *); 159 static inline void pcib_write_irq_mask(struct mv_pcib_softc *, uint32_t); 160 static void mv_pcib_enable(struct mv_pcib_softc *, uint32_t); 161 static int mv_pcib_mem_init(struct mv_pcib_softc *); 162 163 /* Forward prototypes */ 164 static int mv_pcib_probe(device_t); 165 static int mv_pcib_attach(device_t); 166 167 static struct resource *mv_pcib_alloc_resource(device_t, device_t, int, int *, 168 u_long, u_long, u_long, u_int); 169 static int mv_pcib_release_resource(device_t, device_t, int, int, 170 struct resource *); 171 static int mv_pcib_read_ivar(device_t, device_t, int, uintptr_t *); 172 static int mv_pcib_write_ivar(device_t, device_t, int, uintptr_t); 173 174 static int mv_pcib_maxslots(device_t); 175 static uint32_t mv_pcib_read_config(device_t, u_int, u_int, u_int, u_int, int); 176 static void mv_pcib_write_config(device_t, u_int, u_int, u_int, u_int, 177 uint32_t, int); 178 static int mv_pcib_route_interrupt(device_t, device_t, int); 179 #if defined(SOC_MV_ARMADAXP) 180 static int mv_pcib_alloc_msi(device_t, device_t, int, int, int *); 181 static int mv_pcib_map_msi(device_t, device_t, int, uint64_t *, uint32_t *); 182 static int mv_pcib_release_msi(device_t, device_t, int, int *); 183 #endif 184 185 /* 186 * Bus interface definitions. 187 */ 188 static device_method_t mv_pcib_methods[] = { 189 /* Device interface */ 190 DEVMETHOD(device_probe, mv_pcib_probe), 191 DEVMETHOD(device_attach, mv_pcib_attach), 192 193 /* Bus interface */ 194 DEVMETHOD(bus_read_ivar, mv_pcib_read_ivar), 195 DEVMETHOD(bus_write_ivar, mv_pcib_write_ivar), 196 DEVMETHOD(bus_alloc_resource, mv_pcib_alloc_resource), 197 DEVMETHOD(bus_release_resource, mv_pcib_release_resource), 198 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 199 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 200 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 201 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 202 203 /* pcib interface */ 204 DEVMETHOD(pcib_maxslots, mv_pcib_maxslots), 205 DEVMETHOD(pcib_read_config, mv_pcib_read_config), 206 DEVMETHOD(pcib_write_config, mv_pcib_write_config), 207 DEVMETHOD(pcib_route_interrupt, mv_pcib_route_interrupt), 208 209 #if defined(SOC_MV_ARMADAXP) 210 DEVMETHOD(pcib_alloc_msi, mv_pcib_alloc_msi), 211 DEVMETHOD(pcib_release_msi, mv_pcib_release_msi), 212 DEVMETHOD(pcib_map_msi, mv_pcib_map_msi), 213 #endif 214 215 /* OFW bus interface */ 216 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 217 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 218 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 219 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 220 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 221 222 DEVMETHOD_END 223 }; 224 225 static driver_t mv_pcib_driver = { 226 "pcib", 227 mv_pcib_methods, 228 sizeof(struct mv_pcib_softc), 229 }; 230 231 devclass_t pcib_devclass; 232 233 DRIVER_MODULE(pcib, fdtbus, mv_pcib_driver, pcib_devclass, 0, 0); 234 235 static struct mtx pcicfg_mtx; 236 237 static int 238 mv_pcib_probe(device_t self) 239 { 240 phandle_t node; 241 242 node = ofw_bus_get_node(self); 243 if (!fdt_is_type(node, "pci")) 244 return (ENXIO); 245 246 if (!(fdt_is_compatible(node, "mrvl,pcie") || 247 fdt_is_compatible(node, "mrvl,pci"))) 248 return (ENXIO); 249 250 device_set_desc(self, "Marvell Integrated PCI/PCI-E Controller"); 251 return (BUS_PROBE_DEFAULT); 252 } 253 254 static int 255 mv_pcib_attach(device_t self) 256 { 257 struct mv_pcib_softc *sc; 258 phandle_t node, parnode; 259 uint32_t val, unit; 260 int err; 261 262 sc = device_get_softc(self); 263 sc->sc_dev = self; 264 unit = fdt_get_unit(self); 265 266 267 node = ofw_bus_get_node(self); 268 parnode = OF_parent(node); 269 if (fdt_is_compatible(node, "mrvl,pcie")) { 270 sc->sc_type = MV_TYPE_PCIE; 271 sc->sc_win_target = MV_WIN_PCIE_TARGET(unit); 272 sc->sc_mem_win_attr = MV_WIN_PCIE_MEM_ATTR(unit); 273 sc->sc_io_win_attr = MV_WIN_PCIE_IO_ATTR(unit); 274 } else if (fdt_is_compatible(node, "mrvl,pci")) { 275 sc->sc_type = MV_TYPE_PCI; 276 sc->sc_win_target = MV_WIN_PCI_TARGET; 277 sc->sc_mem_win_attr = MV_WIN_PCI_MEM_ATTR; 278 sc->sc_io_win_attr = MV_WIN_PCI_IO_ATTR; 279 } else 280 return (ENXIO); 281 282 /* 283 * Retrieve our mem-mapped registers range. 284 */ 285 sc->sc_rid = 0; 286 sc->sc_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &sc->sc_rid, 287 RF_ACTIVE); 288 if (sc->sc_res == NULL) { 289 device_printf(self, "could not map memory\n"); 290 return (ENXIO); 291 } 292 sc->sc_bst = rman_get_bustag(sc->sc_res); 293 sc->sc_bsh = rman_get_bushandle(sc->sc_res); 294 295 val = bus_space_read_4(sc->sc_bst, sc->sc_bsh, PCIE_REG_CONTROL); 296 sc->sc_mode = (val & PCIE_CONTROL_ROOT_CMPLX ? MV_MODE_ROOT : 297 MV_MODE_ENDPOINT); 298 299 /* 300 * Get PCI interrupt info. 301 */ 302 if ((sc->sc_mode == MV_MODE_ROOT) && 303 (mv_pcib_intr_info(node, sc) != 0)) { 304 device_printf(self, "could not retrieve interrupt info\n"); 305 return (ENXIO); 306 } 307 308 /* 309 * Configure decode windows for PCI(E) access. 310 */ 311 if (mv_pcib_decode_win(node, sc) != 0) 312 return (ENXIO); 313 314 mv_pcib_hw_cfginit(); 315 316 /* 317 * Enable PCIE device. 318 */ 319 mv_pcib_enable(sc, unit); 320 321 /* 322 * Memory management. 323 */ 324 err = mv_pcib_mem_init(sc); 325 if (err) 326 return (err); 327 328 if (sc->sc_mode == MV_MODE_ROOT) { 329 err = mv_pcib_init(sc, sc->sc_busnr, 330 mv_pcib_maxslots(sc->sc_dev)); 331 if (err) 332 goto error; 333 334 device_add_child(self, "pci", -1); 335 } else { 336 sc->sc_devnr = 1; 337 bus_space_write_4(sc->sc_bst, sc->sc_bsh, 338 PCIE_REG_STATUS, 1 << PCIE_STATUS_DEV_OFFS); 339 device_add_child(self, "pci_ep", -1); 340 } 341 342 mtx_init(&sc->sc_msi_mtx, "msi_mtx", NULL, MTX_DEF); 343 return (bus_generic_attach(self)); 344 345 error: 346 /* XXX SYS_RES_ should be released here */ 347 rman_fini(&sc->sc_mem_rman); 348 rman_fini(&sc->sc_io_rman); 349 350 return (err); 351 } 352 353 static void 354 mv_pcib_enable(struct mv_pcib_softc *sc, uint32_t unit) 355 { 356 uint32_t val; 357 #if !defined(SOC_MV_ARMADAXP) 358 int timeout; 359 360 /* 361 * Check if PCIE device is enabled. 362 */ 363 if (read_cpu_ctrl(CPU_CONTROL) & CPU_CONTROL_PCIE_DISABLE(unit)) { 364 write_cpu_ctrl(CPU_CONTROL, read_cpu_ctrl(CPU_CONTROL) & 365 ~(CPU_CONTROL_PCIE_DISABLE(unit))); 366 367 timeout = PCIE_LINK_TIMEOUT; 368 val = bus_space_read_4(sc->sc_bst, sc->sc_bsh, 369 PCIE_REG_STATUS); 370 while (((val & PCIE_STATUS_LINK_DOWN) == 1) && (timeout > 0)) { 371 DELAY(1000); 372 timeout -= 1000; 373 val = bus_space_read_4(sc->sc_bst, sc->sc_bsh, 374 PCIE_REG_STATUS); 375 } 376 } 377 #endif 378 379 380 if (sc->sc_mode == MV_MODE_ROOT) { 381 /* 382 * Enable PCI bridge. 383 */ 384 val = bus_space_read_4(sc->sc_bst, sc->sc_bsh, PCIR_COMMAND); 385 val |= PCIM_CMD_SERRESPEN | PCIM_CMD_BUSMASTEREN | 386 PCIM_CMD_MEMEN | PCIM_CMD_PORTEN; 387 bus_space_write_4(sc->sc_bst, sc->sc_bsh, PCIR_COMMAND, val); 388 } 389 } 390 391 static int 392 mv_pcib_mem_init(struct mv_pcib_softc *sc) 393 { 394 int err; 395 396 /* 397 * Memory management. 398 */ 399 sc->sc_mem_rman.rm_type = RMAN_ARRAY; 400 err = rman_init(&sc->sc_mem_rman); 401 if (err) 402 return (err); 403 404 sc->sc_io_rman.rm_type = RMAN_ARRAY; 405 err = rman_init(&sc->sc_io_rman); 406 if (err) { 407 rman_fini(&sc->sc_mem_rman); 408 return (err); 409 } 410 411 err = rman_manage_region(&sc->sc_mem_rman, sc->sc_mem_base, 412 sc->sc_mem_base + sc->sc_mem_size - 1); 413 if (err) 414 goto error; 415 416 err = rman_manage_region(&sc->sc_io_rman, sc->sc_io_base, 417 sc->sc_io_base + sc->sc_io_size - 1); 418 if (err) 419 goto error; 420 421 return (0); 422 423 error: 424 rman_fini(&sc->sc_mem_rman); 425 rman_fini(&sc->sc_io_rman); 426 427 return (err); 428 } 429 430 static inline uint32_t 431 pcib_bit_get(uint32_t *map, uint32_t bit) 432 { 433 uint32_t n = bit / BITS_PER_UINT32; 434 435 bit = bit % BITS_PER_UINT32; 436 return (map[n] & (1 << bit)); 437 } 438 439 static inline void 440 pcib_bit_set(uint32_t *map, uint32_t bit) 441 { 442 uint32_t n = bit / BITS_PER_UINT32; 443 444 bit = bit % BITS_PER_UINT32; 445 map[n] |= (1 << bit); 446 } 447 448 static inline uint32_t 449 pcib_map_check(uint32_t *map, uint32_t start, uint32_t bits) 450 { 451 uint32_t i; 452 453 for (i = start; i < start + bits; i++) 454 if (pcib_bit_get(map, i)) 455 return (0); 456 457 return (1); 458 } 459 460 static inline void 461 pcib_map_set(uint32_t *map, uint32_t start, uint32_t bits) 462 { 463 uint32_t i; 464 465 for (i = start; i < start + bits; i++) 466 pcib_bit_set(map, i); 467 } 468 469 /* 470 * The idea of this allocator is taken from ARM No-Cache memory 471 * management code (sys/arm/arm/vm_machdep.c). 472 */ 473 static bus_addr_t 474 pcib_alloc(struct mv_pcib_softc *sc, uint32_t smask) 475 { 476 uint32_t bits, bits_limit, i, *map, min_alloc, size; 477 bus_addr_t addr = 0; 478 bus_addr_t base; 479 480 if (smask & 1) { 481 base = sc->sc_io_base; 482 min_alloc = PCI_MIN_IO_ALLOC; 483 bits_limit = sc->sc_io_size / min_alloc; 484 map = sc->sc_io_map; 485 smask &= ~0x3; 486 } else { 487 base = sc->sc_mem_base; 488 min_alloc = PCI_MIN_MEM_ALLOC; 489 bits_limit = sc->sc_mem_size / min_alloc; 490 map = sc->sc_mem_map; 491 smask &= ~0xF; 492 } 493 494 size = ~smask + 1; 495 bits = size / min_alloc; 496 497 for (i = 0; i + bits <= bits_limit; i += bits) 498 if (pcib_map_check(map, i, bits)) { 499 pcib_map_set(map, i, bits); 500 addr = base + (i * min_alloc); 501 return (addr); 502 } 503 504 return (addr); 505 } 506 507 static int 508 mv_pcib_init_bar(struct mv_pcib_softc *sc, int bus, int slot, int func, 509 int barno) 510 { 511 uint32_t addr, bar; 512 int reg, width; 513 514 reg = PCIR_BAR(barno); 515 516 /* 517 * Need to init the BAR register with 0xffffffff before correct 518 * value can be read. 519 */ 520 mv_pcib_write_config(sc->sc_dev, bus, slot, func, reg, ~0, 4); 521 bar = mv_pcib_read_config(sc->sc_dev, bus, slot, func, reg, 4); 522 if (bar == 0) 523 return (1); 524 525 /* Calculate BAR size: 64 or 32 bit (in 32-bit units) */ 526 width = ((bar & 7) == 4) ? 2 : 1; 527 528 addr = pcib_alloc(sc, bar); 529 if (!addr) 530 return (-1); 531 532 if (bootverbose) 533 printf("PCI %u:%u:%u: reg %x: smask=%08x: addr=%08x\n", 534 bus, slot, func, reg, bar, addr); 535 536 mv_pcib_write_config(sc->sc_dev, bus, slot, func, reg, addr, 4); 537 if (width == 2) 538 mv_pcib_write_config(sc->sc_dev, bus, slot, func, reg + 4, 539 0, 4); 540 541 return (width); 542 } 543 544 static void 545 mv_pcib_init_bridge(struct mv_pcib_softc *sc, int bus, int slot, int func) 546 { 547 bus_addr_t io_base, mem_base; 548 uint32_t io_limit, mem_limit; 549 int secbus; 550 551 io_base = sc->sc_io_base; 552 io_limit = io_base + sc->sc_io_size - 1; 553 mem_base = sc->sc_mem_base; 554 mem_limit = mem_base + sc->sc_mem_size - 1; 555 556 /* Configure I/O decode registers */ 557 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_IOBASEL_1, 558 io_base >> 8, 1); 559 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_IOBASEH_1, 560 io_base >> 16, 2); 561 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_IOLIMITL_1, 562 io_limit >> 8, 1); 563 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_IOLIMITH_1, 564 io_limit >> 16, 2); 565 566 /* Configure memory decode registers */ 567 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_MEMBASE_1, 568 mem_base >> 16, 2); 569 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_MEMLIMIT_1, 570 mem_limit >> 16, 2); 571 572 /* Disable memory prefetch decode */ 573 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_PMBASEL_1, 574 0x10, 2); 575 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_PMBASEH_1, 576 0x0, 4); 577 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_PMLIMITL_1, 578 0xF, 2); 579 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_PMLIMITH_1, 580 0x0, 4); 581 582 secbus = mv_pcib_read_config(sc->sc_dev, bus, slot, func, 583 PCIR_SECBUS_1, 1); 584 585 /* Configure buses behind the bridge */ 586 mv_pcib_init(sc, secbus, PCI_SLOTMAX); 587 } 588 589 static int 590 mv_pcib_init(struct mv_pcib_softc *sc, int bus, int maxslot) 591 { 592 int slot, func, maxfunc, error; 593 uint8_t hdrtype, command, class, subclass; 594 595 for (slot = 0; slot <= maxslot; slot++) { 596 maxfunc = 0; 597 for (func = 0; func <= maxfunc; func++) { 598 hdrtype = mv_pcib_read_config(sc->sc_dev, bus, slot, 599 func, PCIR_HDRTYPE, 1); 600 601 if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE) 602 continue; 603 604 if (func == 0 && (hdrtype & PCIM_MFDEV)) 605 maxfunc = PCI_FUNCMAX; 606 607 command = mv_pcib_read_config(sc->sc_dev, bus, slot, 608 func, PCIR_COMMAND, 1); 609 command &= ~(PCIM_CMD_MEMEN | PCIM_CMD_PORTEN); 610 mv_pcib_write_config(sc->sc_dev, bus, slot, func, 611 PCIR_COMMAND, command, 1); 612 613 error = mv_pcib_init_all_bars(sc, bus, slot, func, 614 hdrtype); 615 616 if (error) 617 return (error); 618 619 command |= PCIM_CMD_BUSMASTEREN | PCIM_CMD_MEMEN | 620 PCIM_CMD_PORTEN; 621 mv_pcib_write_config(sc->sc_dev, bus, slot, func, 622 PCIR_COMMAND, command, 1); 623 624 /* Handle PCI-PCI bridges */ 625 class = mv_pcib_read_config(sc->sc_dev, bus, slot, 626 func, PCIR_CLASS, 1); 627 subclass = mv_pcib_read_config(sc->sc_dev, bus, slot, 628 func, PCIR_SUBCLASS, 1); 629 630 if (class != PCIC_BRIDGE || 631 subclass != PCIS_BRIDGE_PCI) 632 continue; 633 634 mv_pcib_init_bridge(sc, bus, slot, func); 635 } 636 } 637 638 /* Enable all ABCD interrupts */ 639 pcib_write_irq_mask(sc, (0xF << 24)); 640 641 return (0); 642 } 643 644 static int 645 mv_pcib_init_all_bars(struct mv_pcib_softc *sc, int bus, int slot, 646 int func, int hdrtype) 647 { 648 int maxbar, bar, i; 649 650 maxbar = (hdrtype & PCIM_HDRTYPE) ? 0 : 6; 651 bar = 0; 652 653 /* Program the base address registers */ 654 while (bar < maxbar) { 655 i = mv_pcib_init_bar(sc, bus, slot, func, bar); 656 bar += i; 657 if (i < 0) { 658 device_printf(sc->sc_dev, 659 "PCI IO/Memory space exhausted\n"); 660 return (ENOMEM); 661 } 662 } 663 664 return (0); 665 } 666 667 static struct resource * 668 mv_pcib_alloc_resource(device_t dev, device_t child, int type, int *rid, 669 u_long start, u_long end, u_long count, u_int flags) 670 { 671 struct mv_pcib_softc *sc = device_get_softc(dev); 672 struct rman *rm = NULL; 673 struct resource *res; 674 675 switch (type) { 676 case SYS_RES_IOPORT: 677 rm = &sc->sc_io_rman; 678 break; 679 case SYS_RES_MEMORY: 680 rm = &sc->sc_mem_rman; 681 break; 682 default: 683 return (BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, 684 type, rid, start, end, count, flags)); 685 }; 686 687 if ((start == 0UL) && (end == ~0UL)) { 688 start = sc->sc_mem_base; 689 end = sc->sc_mem_base + sc->sc_mem_size - 1; 690 count = sc->sc_mem_size; 691 } 692 693 if ((start < sc->sc_mem_base) || (start + count - 1 != end) || 694 (end > sc->sc_mem_base + sc->sc_mem_size - 1)) 695 return (NULL); 696 697 res = rman_reserve_resource(rm, start, end, count, flags, child); 698 if (res == NULL) 699 return (NULL); 700 701 rman_set_rid(res, *rid); 702 rman_set_bustag(res, fdtbus_bs_tag); 703 rman_set_bushandle(res, start); 704 705 if (flags & RF_ACTIVE) 706 if (bus_activate_resource(child, type, *rid, res)) { 707 rman_release_resource(res); 708 return (NULL); 709 } 710 711 return (res); 712 } 713 714 static int 715 mv_pcib_release_resource(device_t dev, device_t child, int type, int rid, 716 struct resource *res) 717 { 718 719 if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY) 720 return (BUS_RELEASE_RESOURCE(device_get_parent(dev), child, 721 type, rid, res)); 722 723 return (rman_release_resource(res)); 724 } 725 726 static int 727 mv_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 728 { 729 struct mv_pcib_softc *sc = device_get_softc(dev); 730 731 switch (which) { 732 case PCIB_IVAR_BUS: 733 *result = sc->sc_busnr; 734 return (0); 735 case PCIB_IVAR_DOMAIN: 736 *result = device_get_unit(dev); 737 return (0); 738 } 739 740 return (ENOENT); 741 } 742 743 static int 744 mv_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 745 { 746 struct mv_pcib_softc *sc = device_get_softc(dev); 747 748 switch (which) { 749 case PCIB_IVAR_BUS: 750 sc->sc_busnr = value; 751 return (0); 752 } 753 754 return (ENOENT); 755 } 756 757 static inline void 758 pcib_write_irq_mask(struct mv_pcib_softc *sc, uint32_t mask) 759 { 760 761 if (!sc->sc_type != MV_TYPE_PCI) 762 return; 763 764 bus_space_write_4(sc->sc_bst, sc->sc_bsh, PCIE_REG_IRQ_MASK, mask); 765 } 766 767 static void 768 mv_pcib_hw_cfginit(void) 769 { 770 static int opened = 0; 771 772 if (opened) 773 return; 774 775 mtx_init(&pcicfg_mtx, "pcicfg", NULL, MTX_SPIN); 776 opened = 1; 777 } 778 779 static uint32_t 780 mv_pcib_hw_cfgread(struct mv_pcib_softc *sc, u_int bus, u_int slot, 781 u_int func, u_int reg, int bytes) 782 { 783 uint32_t addr, data, ca, cd; 784 785 ca = (sc->sc_type != MV_TYPE_PCI) ? 786 PCIE_REG_CFG_ADDR : PCI_REG_CFG_ADDR; 787 cd = (sc->sc_type != MV_TYPE_PCI) ? 788 PCIE_REG_CFG_DATA : PCI_REG_CFG_DATA; 789 addr = PCI_CFG_ENA | PCI_CFG_BUS(bus) | PCI_CFG_DEV(slot) | 790 PCI_CFG_FUN(func) | PCI_CFG_PCIE_REG(reg); 791 792 mtx_lock_spin(&pcicfg_mtx); 793 bus_space_write_4(sc->sc_bst, sc->sc_bsh, ca, addr); 794 795 data = ~0; 796 switch (bytes) { 797 case 1: 798 data = bus_space_read_1(sc->sc_bst, sc->sc_bsh, 799 cd + (reg & 3)); 800 break; 801 case 2: 802 data = le16toh(bus_space_read_2(sc->sc_bst, sc->sc_bsh, 803 cd + (reg & 2))); 804 break; 805 case 4: 806 data = le32toh(bus_space_read_4(sc->sc_bst, sc->sc_bsh, 807 cd)); 808 break; 809 } 810 mtx_unlock_spin(&pcicfg_mtx); 811 return (data); 812 } 813 814 static void 815 mv_pcib_hw_cfgwrite(struct mv_pcib_softc *sc, u_int bus, u_int slot, 816 u_int func, u_int reg, uint32_t data, int bytes) 817 { 818 uint32_t addr, ca, cd; 819 820 ca = (sc->sc_type != MV_TYPE_PCI) ? 821 PCIE_REG_CFG_ADDR : PCI_REG_CFG_ADDR; 822 cd = (sc->sc_type != MV_TYPE_PCI) ? 823 PCIE_REG_CFG_DATA : PCI_REG_CFG_DATA; 824 addr = PCI_CFG_ENA | PCI_CFG_BUS(bus) | PCI_CFG_DEV(slot) | 825 PCI_CFG_FUN(func) | PCI_CFG_PCIE_REG(reg); 826 827 mtx_lock_spin(&pcicfg_mtx); 828 bus_space_write_4(sc->sc_bst, sc->sc_bsh, ca, addr); 829 830 switch (bytes) { 831 case 1: 832 bus_space_write_1(sc->sc_bst, sc->sc_bsh, 833 cd + (reg & 3), data); 834 break; 835 case 2: 836 bus_space_write_2(sc->sc_bst, sc->sc_bsh, 837 cd + (reg & 2), htole16(data)); 838 break; 839 case 4: 840 bus_space_write_4(sc->sc_bst, sc->sc_bsh, 841 cd, htole32(data)); 842 break; 843 } 844 mtx_unlock_spin(&pcicfg_mtx); 845 } 846 847 static int 848 mv_pcib_maxslots(device_t dev) 849 { 850 struct mv_pcib_softc *sc = device_get_softc(dev); 851 852 return ((sc->sc_type != MV_TYPE_PCI) ? 1 : PCI_SLOTMAX); 853 } 854 855 static uint32_t 856 mv_pcib_read_config(device_t dev, u_int bus, u_int slot, u_int func, 857 u_int reg, int bytes) 858 { 859 struct mv_pcib_softc *sc = device_get_softc(dev); 860 861 /* Return ~0 if link is inactive or trying to read from Root */ 862 if ((bus_space_read_4(sc->sc_bst, sc->sc_bsh, PCIE_REG_STATUS) & 863 PCIE_STATUS_LINK_DOWN) || (slot == 0)) 864 return (~0U); 865 866 return (mv_pcib_hw_cfgread(sc, bus, slot, func, reg, bytes)); 867 } 868 869 static void 870 mv_pcib_write_config(device_t dev, u_int bus, u_int slot, u_int func, 871 u_int reg, uint32_t val, int bytes) 872 { 873 struct mv_pcib_softc *sc = device_get_softc(dev); 874 875 /* Return if link is inactive or trying to write to Root */ 876 if ((bus_space_read_4(sc->sc_bst, sc->sc_bsh, PCIE_REG_STATUS) & 877 PCIE_STATUS_LINK_DOWN) || (slot == 0)) 878 return; 879 880 mv_pcib_hw_cfgwrite(sc, bus, slot, func, reg, val, bytes); 881 } 882 883 static int 884 mv_pcib_route_interrupt(device_t pcib, device_t dev, int pin) 885 { 886 struct mv_pcib_softc *sc; 887 int err, interrupt; 888 889 sc = device_get_softc(pcib); 890 891 err = fdt_pci_route_intr(pci_get_bus(dev), pci_get_slot(dev), 892 pci_get_function(dev), pin, &sc->sc_intr_info, &interrupt); 893 if (err == 0) 894 return (interrupt); 895 896 device_printf(pcib, "could not route pin %d for device %d.%d\n", 897 pin, pci_get_slot(dev), pci_get_function(dev)); 898 return (PCI_INVALID_IRQ); 899 } 900 901 static int 902 mv_pcib_decode_win(phandle_t node, struct mv_pcib_softc *sc) 903 { 904 struct fdt_pci_range io_space, mem_space; 905 device_t dev; 906 int error; 907 908 dev = sc->sc_dev; 909 910 if ((error = fdt_pci_ranges(node, &io_space, &mem_space)) != 0) { 911 device_printf(dev, "could not retrieve 'ranges' data\n"); 912 return (error); 913 } 914 915 /* Configure CPU decoding windows */ 916 error = decode_win_cpu_set(sc->sc_win_target, 917 sc->sc_io_win_attr, io_space.base_parent, io_space.len, ~0); 918 if (error < 0) { 919 device_printf(dev, "could not set up CPU decode " 920 "window for PCI IO\n"); 921 return (ENXIO); 922 } 923 error = decode_win_cpu_set(sc->sc_win_target, 924 sc->sc_mem_win_attr, mem_space.base_parent, mem_space.len, 925 mem_space.base_parent); 926 if (error < 0) { 927 device_printf(dev, "could not set up CPU decode " 928 "windows for PCI MEM\n"); 929 return (ENXIO); 930 } 931 932 sc->sc_io_base = io_space.base_parent; 933 sc->sc_io_size = io_space.len; 934 935 sc->sc_mem_base = mem_space.base_parent; 936 sc->sc_mem_size = mem_space.len; 937 938 return (0); 939 } 940 941 static int 942 mv_pcib_intr_info(phandle_t node, struct mv_pcib_softc *sc) 943 { 944 int error; 945 946 if ((error = fdt_pci_intr_info(node, &sc->sc_intr_info)) != 0) 947 return (error); 948 949 return (0); 950 } 951 952 #if defined(SOC_MV_ARMADAXP) 953 static int 954 mv_pcib_map_msi(device_t dev, device_t child, int irq, uint64_t *addr, 955 uint32_t *data) 956 { 957 struct mv_pcib_softc *sc; 958 959 sc = device_get_softc(dev); 960 irq = irq - MSI_IRQ; 961 962 /* validate parameters */ 963 if (isclr(&sc->sc_msi_bitmap, irq)) { 964 device_printf(dev, "invalid MSI 0x%x\n", irq); 965 return (EINVAL); 966 } 967 968 mv_msi_data(irq, addr, data); 969 970 debugf("%s: irq: %d addr: %jx data: %x\n", 971 __func__, irq, *addr, *data); 972 973 return (0); 974 } 975 976 static int 977 mv_pcib_alloc_msi(device_t dev, device_t child, int count, 978 int maxcount __unused, int *irqs) 979 { 980 struct mv_pcib_softc *sc; 981 u_int start = 0, i; 982 983 if (powerof2(count) == 0 || count > MSI_IRQ_NUM) 984 return (EINVAL); 985 986 sc = device_get_softc(dev); 987 mtx_lock(&sc->sc_msi_mtx); 988 989 for (start = 0; (start + count) < MSI_IRQ_NUM; start++) { 990 for (i = start; i < start + count; i++) { 991 if (isset(&sc->sc_msi_bitmap, i)) 992 break; 993 } 994 if (i == start + count) 995 break; 996 } 997 998 if ((start + count) == MSI_IRQ_NUM) { 999 mtx_unlock(&sc->sc_msi_mtx); 1000 return (ENXIO); 1001 } 1002 1003 for (i = start; i < start + count; i++) { 1004 setbit(&sc->sc_msi_bitmap, i); 1005 irqs[i] = MSI_IRQ + i; 1006 } 1007 debugf("%s: start: %x count: %x\n", __func__, start, count); 1008 1009 mtx_unlock(&sc->sc_msi_mtx); 1010 return (0); 1011 } 1012 1013 static int 1014 mv_pcib_release_msi(device_t dev, device_t child, int count, int *irqs) 1015 { 1016 struct mv_pcib_softc *sc; 1017 u_int i; 1018 1019 sc = device_get_softc(dev); 1020 mtx_lock(&sc->sc_msi_mtx); 1021 1022 for (i = 0; i < count; i++) 1023 clrbit(&sc->sc_msi_bitmap, irqs[i] - MSI_IRQ); 1024 1025 mtx_unlock(&sc->sc_msi_mtx); 1026 return (0); 1027 } 1028 #endif
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