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sys/arm/mv/mv_pci.c
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1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2008 MARVELL INTERNATIONAL LTD. 5 * Copyright (c) 2010 The FreeBSD Foundation 6 * Copyright (c) 2010-2015 Semihalf 7 * All rights reserved. 8 * 9 * Developed by Semihalf. 10 * 11 * Portions of this software were developed by Semihalf 12 * under sponsorship from the FreeBSD Foundation. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. Neither the name of MARVELL nor the names of contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 /* 40 * Marvell integrated PCI/PCI-Express controller driver. 41 */ 42 43 #include <sys/cdefs.h> 44 __FBSDID("$FreeBSD: releng/12.0/sys/arm/mv/mv_pci.c 332274 2018-04-08 12:20:06Z andrew $"); 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/kernel.h> 49 #include <sys/lock.h> 50 #include <sys/malloc.h> 51 #include <sys/module.h> 52 #include <sys/mutex.h> 53 #include <sys/queue.h> 54 #include <sys/bus.h> 55 #include <sys/rman.h> 56 #include <sys/endian.h> 57 #include <sys/devmap.h> 58 59 #include <machine/fdt.h> 60 #include <machine/intr.h> 61 62 #include <vm/vm.h> 63 #include <vm/pmap.h> 64 65 #include <dev/fdt/fdt_common.h> 66 #include <dev/ofw/ofw_bus.h> 67 #include <dev/ofw/ofw_bus_subr.h> 68 #include <dev/ofw/ofw_pci.h> 69 #include <dev/pci/pcivar.h> 70 #include <dev/pci/pcireg.h> 71 #include <dev/pci/pcib_private.h> 72 73 #include "ofw_bus_if.h" 74 #include "pcib_if.h" 75 76 #include <machine/resource.h> 77 #include <machine/bus.h> 78 79 #include <arm/mv/mvreg.h> 80 #include <arm/mv/mvvar.h> 81 #include <arm/mv/mvwin.h> 82 83 #ifdef DEBUG 84 #define debugf(fmt, args...) do { printf(fmt,##args); } while (0) 85 #else 86 #define debugf(fmt, args...) 87 #endif 88 89 /* 90 * Code and data related to fdt-based PCI configuration. 91 * 92 * This stuff used to be in dev/fdt/fdt_pci.c and fdt_common.h, but it was 93 * always Marvell-specific so that was deleted and the code now lives here. 94 */ 95 96 struct mv_pci_range { 97 u_long base_pci; 98 u_long base_parent; 99 u_long len; 100 }; 101 102 #define FDT_RANGES_CELLS ((3 + 3 + 2) * 2) 103 #define PCI_SPACE_LEN 0x00100000 104 105 static void 106 mv_pci_range_dump(struct mv_pci_range *range) 107 { 108 #ifdef DEBUG 109 printf("\n"); 110 printf(" base_pci = 0x%08lx\n", range->base_pci); 111 printf(" base_par = 0x%08lx\n", range->base_parent); 112 printf(" len = 0x%08lx\n", range->len); 113 #endif 114 } 115 116 static int 117 mv_pci_ranges_decode(phandle_t node, struct mv_pci_range *io_space, 118 struct mv_pci_range *mem_space) 119 { 120 pcell_t ranges[FDT_RANGES_CELLS]; 121 struct mv_pci_range *pci_space; 122 pcell_t addr_cells, size_cells, par_addr_cells; 123 pcell_t *rangesptr; 124 pcell_t cell0, cell1, cell2; 125 int tuple_size, tuples, i, rv, offset_cells, len; 126 int portid, is_io_space; 127 128 /* 129 * Retrieve 'ranges' property. 130 */ 131 if ((fdt_addrsize_cells(node, &addr_cells, &size_cells)) != 0) 132 return (EINVAL); 133 if (addr_cells != 3 || size_cells != 2) 134 return (ERANGE); 135 136 par_addr_cells = fdt_parent_addr_cells(node); 137 if (par_addr_cells > 3) 138 return (ERANGE); 139 140 len = OF_getproplen(node, "ranges"); 141 if (len > sizeof(ranges)) 142 return (ENOMEM); 143 144 if (OF_getprop(node, "ranges", ranges, sizeof(ranges)) <= 0) 145 return (EINVAL); 146 147 tuple_size = sizeof(pcell_t) * (addr_cells + par_addr_cells + 148 size_cells); 149 tuples = len / tuple_size; 150 151 /* 152 * Initialize the ranges so that we don't have to worry about 153 * having them all defined in the FDT. In particular, it is 154 * perfectly fine not to want I/O space on PCI buses. 155 */ 156 bzero(io_space, sizeof(*io_space)); 157 bzero(mem_space, sizeof(*mem_space)); 158 159 rangesptr = &ranges[0]; 160 offset_cells = 0; 161 for (i = 0; i < tuples; i++) { 162 cell0 = fdt_data_get((void *)rangesptr, 1); 163 rangesptr++; 164 cell1 = fdt_data_get((void *)rangesptr, 1); 165 rangesptr++; 166 cell2 = fdt_data_get((void *)rangesptr, 1); 167 rangesptr++; 168 portid = fdt_data_get((void *)(rangesptr+1), 1); 169 170 if (cell0 & 0x02000000) { 171 pci_space = mem_space; 172 is_io_space = 0; 173 } else if (cell0 & 0x01000000) { 174 pci_space = io_space; 175 is_io_space = 1; 176 } else { 177 rv = ERANGE; 178 goto out; 179 } 180 181 if (par_addr_cells == 3) { 182 /* 183 * This is a PCI subnode 'ranges'. Skip cell0 and 184 * cell1 of this entry and only use cell2. 185 */ 186 offset_cells = 2; 187 rangesptr += offset_cells; 188 } 189 190 if ((par_addr_cells - offset_cells) > 2) { 191 rv = ERANGE; 192 goto out; 193 } 194 pci_space->base_parent = fdt_data_get((void *)rangesptr, 195 par_addr_cells - offset_cells); 196 rangesptr += par_addr_cells - offset_cells; 197 198 if (size_cells > 2) { 199 rv = ERANGE; 200 goto out; 201 } 202 pci_space->len = fdt_data_get((void *)rangesptr, size_cells); 203 rangesptr += size_cells; 204 205 pci_space->base_pci = cell2; 206 207 if (pci_space->len == 0) { 208 pci_space->len = PCI_SPACE_LEN; 209 pci_space->base_parent = fdt_immr_va + 210 PCI_SPACE_LEN * ( 2 * portid + is_io_space); 211 } 212 } 213 rv = 0; 214 out: 215 return (rv); 216 } 217 218 static int 219 mv_pci_ranges(phandle_t node, struct mv_pci_range *io_space, 220 struct mv_pci_range *mem_space) 221 { 222 int err; 223 224 debugf("Processing PCI node: %x\n", node); 225 if ((err = mv_pci_ranges_decode(node, io_space, mem_space)) != 0) { 226 debugf("could not decode parent PCI node 'ranges'\n"); 227 return (err); 228 } 229 230 debugf("Post fixup dump:\n"); 231 mv_pci_range_dump(io_space); 232 mv_pci_range_dump(mem_space); 233 return (0); 234 } 235 236 int 237 mv_pci_devmap(phandle_t node, struct devmap_entry *devmap, vm_offset_t io_va, 238 vm_offset_t mem_va) 239 { 240 struct mv_pci_range io_space, mem_space; 241 int error; 242 243 if ((error = mv_pci_ranges_decode(node, &io_space, &mem_space)) != 0) 244 return (error); 245 246 devmap->pd_va = (io_va ? io_va : io_space.base_parent); 247 devmap->pd_pa = io_space.base_parent; 248 devmap->pd_size = io_space.len; 249 devmap++; 250 251 devmap->pd_va = (mem_va ? mem_va : mem_space.base_parent); 252 devmap->pd_pa = mem_space.base_parent; 253 devmap->pd_size = mem_space.len; 254 return (0); 255 } 256 257 /* 258 * Code and data related to the Marvell pcib driver. 259 */ 260 261 #define PCI_CFG_ENA (1U << 31) 262 #define PCI_CFG_BUS(bus) (((bus) & 0xff) << 16) 263 #define PCI_CFG_DEV(dev) (((dev) & 0x1f) << 11) 264 #define PCI_CFG_FUN(fun) (((fun) & 0x7) << 8) 265 #define PCI_CFG_PCIE_REG(reg) ((reg) & 0xfc) 266 267 #define PCI_REG_CFG_ADDR 0x0C78 268 #define PCI_REG_CFG_DATA 0x0C7C 269 270 #define PCIE_REG_CFG_ADDR 0x18F8 271 #define PCIE_REG_CFG_DATA 0x18FC 272 #define PCIE_REG_CONTROL 0x1A00 273 #define PCIE_CTRL_LINK1X 0x00000001 274 #define PCIE_REG_STATUS 0x1A04 275 #define PCIE_REG_IRQ_MASK 0x1910 276 277 #define PCIE_CONTROL_ROOT_CMPLX (1 << 1) 278 #define PCIE_CONTROL_HOT_RESET (1 << 24) 279 280 #define PCIE_LINK_TIMEOUT 1000000 281 282 #define PCIE_STATUS_LINK_DOWN 1 283 #define PCIE_STATUS_DEV_OFFS 16 284 285 /* Minimum PCI Memory and I/O allocations taken from PCI spec (in bytes) */ 286 #define PCI_MIN_IO_ALLOC 4 287 #define PCI_MIN_MEM_ALLOC 16 288 289 #define BITS_PER_UINT32 (NBBY * sizeof(uint32_t)) 290 291 struct mv_pcib_softc { 292 device_t sc_dev; 293 294 struct rman sc_mem_rman; 295 bus_addr_t sc_mem_base; 296 bus_addr_t sc_mem_size; 297 uint32_t sc_mem_map[MV_PCI_MEM_SLICE_SIZE / 298 (PCI_MIN_MEM_ALLOC * BITS_PER_UINT32)]; 299 int sc_win_target; 300 int sc_mem_win_attr; 301 302 struct rman sc_io_rman; 303 bus_addr_t sc_io_base; 304 bus_addr_t sc_io_size; 305 uint32_t sc_io_map[MV_PCI_IO_SLICE_SIZE / 306 (PCI_MIN_IO_ALLOC * BITS_PER_UINT32)]; 307 int sc_io_win_attr; 308 309 struct resource *sc_res; 310 bus_space_handle_t sc_bsh; 311 bus_space_tag_t sc_bst; 312 int sc_rid; 313 314 struct mtx sc_msi_mtx; 315 uint32_t sc_msi_bitmap; 316 317 int sc_busnr; /* Host bridge bus number */ 318 int sc_devnr; /* Host bridge device number */ 319 int sc_type; 320 int sc_mode; /* Endpoint / Root Complex */ 321 322 int sc_msi_supported; 323 int sc_skip_enable_procedure; 324 int sc_enable_find_root_slot; 325 struct ofw_bus_iinfo sc_pci_iinfo; 326 327 int ap_segment; /* PCI domain */ 328 }; 329 330 /* Local forward prototypes */ 331 static int mv_pcib_decode_win(phandle_t, struct mv_pcib_softc *); 332 static void mv_pcib_hw_cfginit(void); 333 static uint32_t mv_pcib_hw_cfgread(struct mv_pcib_softc *, u_int, u_int, 334 u_int, u_int, int); 335 static void mv_pcib_hw_cfgwrite(struct mv_pcib_softc *, u_int, u_int, 336 u_int, u_int, uint32_t, int); 337 static int mv_pcib_init(struct mv_pcib_softc *, int, int); 338 static int mv_pcib_init_all_bars(struct mv_pcib_softc *, int, int, int, int); 339 static void mv_pcib_init_bridge(struct mv_pcib_softc *, int, int, int); 340 static inline void pcib_write_irq_mask(struct mv_pcib_softc *, uint32_t); 341 static void mv_pcib_enable(struct mv_pcib_softc *, uint32_t); 342 static int mv_pcib_mem_init(struct mv_pcib_softc *); 343 344 /* Forward prototypes */ 345 static int mv_pcib_probe(device_t); 346 static int mv_pcib_attach(device_t); 347 348 static struct resource *mv_pcib_alloc_resource(device_t, device_t, int, int *, 349 rman_res_t, rman_res_t, rman_res_t, u_int); 350 static int mv_pcib_release_resource(device_t, device_t, int, int, 351 struct resource *); 352 static int mv_pcib_read_ivar(device_t, device_t, int, uintptr_t *); 353 static int mv_pcib_write_ivar(device_t, device_t, int, uintptr_t); 354 355 static int mv_pcib_maxslots(device_t); 356 static uint32_t mv_pcib_read_config(device_t, u_int, u_int, u_int, u_int, int); 357 static void mv_pcib_write_config(device_t, u_int, u_int, u_int, u_int, 358 uint32_t, int); 359 static int mv_pcib_route_interrupt(device_t, device_t, int); 360 361 static int mv_pcib_alloc_msi(device_t, device_t, int, int, int *); 362 static int mv_pcib_map_msi(device_t, device_t, int, uint64_t *, uint32_t *); 363 static int mv_pcib_release_msi(device_t, device_t, int, int *); 364 365 /* 366 * Bus interface definitions. 367 */ 368 static device_method_t mv_pcib_methods[] = { 369 /* Device interface */ 370 DEVMETHOD(device_probe, mv_pcib_probe), 371 DEVMETHOD(device_attach, mv_pcib_attach), 372 373 /* Bus interface */ 374 DEVMETHOD(bus_read_ivar, mv_pcib_read_ivar), 375 DEVMETHOD(bus_write_ivar, mv_pcib_write_ivar), 376 DEVMETHOD(bus_alloc_resource, mv_pcib_alloc_resource), 377 DEVMETHOD(bus_release_resource, mv_pcib_release_resource), 378 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 379 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 380 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 381 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 382 383 /* pcib interface */ 384 DEVMETHOD(pcib_maxslots, mv_pcib_maxslots), 385 DEVMETHOD(pcib_read_config, mv_pcib_read_config), 386 DEVMETHOD(pcib_write_config, mv_pcib_write_config), 387 DEVMETHOD(pcib_route_interrupt, mv_pcib_route_interrupt), 388 DEVMETHOD(pcib_request_feature, pcib_request_feature_allow), 389 390 DEVMETHOD(pcib_alloc_msi, mv_pcib_alloc_msi), 391 DEVMETHOD(pcib_release_msi, mv_pcib_release_msi), 392 DEVMETHOD(pcib_map_msi, mv_pcib_map_msi), 393 394 /* OFW bus interface */ 395 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 396 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 397 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 398 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 399 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 400 401 DEVMETHOD_END 402 }; 403 404 static driver_t mv_pcib_driver = { 405 "pcib", 406 mv_pcib_methods, 407 sizeof(struct mv_pcib_softc), 408 }; 409 410 devclass_t pcib_devclass; 411 412 DRIVER_MODULE(pcib, ofwbus, mv_pcib_driver, pcib_devclass, 0, 0); 413 DRIVER_MODULE(pcib, pcib_ctrl, mv_pcib_driver, pcib_devclass, 0, 0); 414 415 static struct mtx pcicfg_mtx; 416 417 static int 418 mv_pcib_probe(device_t self) 419 { 420 phandle_t node; 421 422 node = ofw_bus_get_node(self); 423 if (!mv_fdt_is_type(node, "pci")) 424 return (ENXIO); 425 426 if (!(ofw_bus_is_compatible(self, "mrvl,pcie") || 427 ofw_bus_is_compatible(self, "mrvl,pci") || 428 ofw_bus_node_is_compatible( 429 OF_parent(node), "marvell,armada-370-pcie"))) 430 return (ENXIO); 431 432 device_set_desc(self, "Marvell Integrated PCI/PCI-E Controller"); 433 return (BUS_PROBE_DEFAULT); 434 } 435 436 static int 437 mv_pcib_attach(device_t self) 438 { 439 struct mv_pcib_softc *sc; 440 phandle_t node, parnode; 441 uint32_t val, reg0; 442 int err, bus, devfn, port_id; 443 444 sc = device_get_softc(self); 445 sc->sc_dev = self; 446 447 node = ofw_bus_get_node(self); 448 parnode = OF_parent(node); 449 450 if (OF_getencprop(node, "marvell,pcie-port", &(port_id), 451 sizeof(port_id)) <= 0) { 452 /* If port ID does not exist in the FDT set value to 0 */ 453 if (!OF_hasprop(node, "marvell,pcie-port")) 454 port_id = 0; 455 else 456 return(ENXIO); 457 } 458 459 sc->ap_segment = port_id; 460 461 if (ofw_bus_node_is_compatible(node, "mrvl,pcie")) { 462 sc->sc_type = MV_TYPE_PCIE; 463 sc->sc_win_target = MV_WIN_PCIE_TARGET(port_id); 464 sc->sc_mem_win_attr = MV_WIN_PCIE_MEM_ATTR(port_id); 465 sc->sc_io_win_attr = MV_WIN_PCIE_IO_ATTR(port_id); 466 #if __ARM_ARCH >= 6 467 sc->sc_skip_enable_procedure = 1; 468 #endif 469 } else if (ofw_bus_node_is_compatible(parnode, "marvell,armada-370-pcie")) { 470 sc->sc_type = MV_TYPE_PCIE; 471 sc->sc_win_target = MV_WIN_PCIE_TARGET_ARMADA38X(port_id); 472 sc->sc_mem_win_attr = MV_WIN_PCIE_MEM_ATTR_ARMADA38X(port_id); 473 sc->sc_io_win_attr = MV_WIN_PCIE_IO_ATTR_ARMADA38X(port_id); 474 sc->sc_enable_find_root_slot = 1; 475 } else if (ofw_bus_node_is_compatible(node, "mrvl,pci")) { 476 sc->sc_type = MV_TYPE_PCI; 477 sc->sc_win_target = MV_WIN_PCI_TARGET; 478 sc->sc_mem_win_attr = MV_WIN_PCI_MEM_ATTR; 479 sc->sc_io_win_attr = MV_WIN_PCI_IO_ATTR; 480 } else 481 return (ENXIO); 482 483 /* 484 * Retrieve our mem-mapped registers range. 485 */ 486 sc->sc_rid = 0; 487 sc->sc_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &sc->sc_rid, 488 RF_ACTIVE); 489 if (sc->sc_res == NULL) { 490 device_printf(self, "could not map memory\n"); 491 return (ENXIO); 492 } 493 sc->sc_bst = rman_get_bustag(sc->sc_res); 494 sc->sc_bsh = rman_get_bushandle(sc->sc_res); 495 496 val = bus_space_read_4(sc->sc_bst, sc->sc_bsh, PCIE_REG_CONTROL); 497 sc->sc_mode = (val & PCIE_CONTROL_ROOT_CMPLX ? MV_MODE_ROOT : 498 MV_MODE_ENDPOINT); 499 500 /* 501 * Get PCI interrupt info. 502 */ 503 if (sc->sc_mode == MV_MODE_ROOT) 504 ofw_bus_setup_iinfo(node, &sc->sc_pci_iinfo, sizeof(pcell_t)); 505 506 /* 507 * Configure decode windows for PCI(E) access. 508 */ 509 if (mv_pcib_decode_win(node, sc) != 0) 510 return (ENXIO); 511 512 mv_pcib_hw_cfginit(); 513 514 /* 515 * Enable PCIE device. 516 */ 517 mv_pcib_enable(sc, port_id); 518 519 /* 520 * Memory management. 521 */ 522 err = mv_pcib_mem_init(sc); 523 if (err) 524 return (err); 525 526 /* 527 * Preliminary bus enumeration to find first linked devices and set 528 * appropriate bus number from which should start the actual enumeration 529 */ 530 for (bus = 0; bus < PCI_BUSMAX; bus++) { 531 for (devfn = 0; devfn < mv_pcib_maxslots(self); devfn++) { 532 reg0 = mv_pcib_read_config(self, bus, devfn, devfn & 0x7, 0x0, 4); 533 if (reg0 == (~0U)) 534 continue; /* no device */ 535 else { 536 sc->sc_busnr = bus; /* update bus number */ 537 break; 538 } 539 } 540 } 541 542 if (sc->sc_mode == MV_MODE_ROOT) { 543 err = mv_pcib_init(sc, sc->sc_busnr, 544 mv_pcib_maxslots(sc->sc_dev)); 545 if (err) 546 goto error; 547 548 device_add_child(self, "pci", -1); 549 } else { 550 sc->sc_devnr = 1; 551 bus_space_write_4(sc->sc_bst, sc->sc_bsh, 552 PCIE_REG_STATUS, 1 << PCIE_STATUS_DEV_OFFS); 553 device_add_child(self, "pci_ep", -1); 554 } 555 556 mtx_init(&sc->sc_msi_mtx, "msi_mtx", NULL, MTX_DEF); 557 return (bus_generic_attach(self)); 558 559 error: 560 /* XXX SYS_RES_ should be released here */ 561 rman_fini(&sc->sc_mem_rman); 562 rman_fini(&sc->sc_io_rman); 563 564 return (err); 565 } 566 567 static void 568 mv_pcib_enable(struct mv_pcib_softc *sc, uint32_t unit) 569 { 570 uint32_t val; 571 int timeout; 572 573 if (sc->sc_skip_enable_procedure) 574 goto pcib_enable_root_mode; 575 576 /* 577 * Check if PCIE device is enabled. 578 */ 579 if ((sc->sc_skip_enable_procedure == 0) && 580 (read_cpu_ctrl(CPU_CONTROL) & CPU_CONTROL_PCIE_DISABLE(unit))) { 581 write_cpu_ctrl(CPU_CONTROL, read_cpu_ctrl(CPU_CONTROL) & 582 ~(CPU_CONTROL_PCIE_DISABLE(unit))); 583 584 timeout = PCIE_LINK_TIMEOUT; 585 val = bus_space_read_4(sc->sc_bst, sc->sc_bsh, 586 PCIE_REG_STATUS); 587 while (((val & PCIE_STATUS_LINK_DOWN) == 1) && (timeout > 0)) { 588 DELAY(1000); 589 timeout -= 1000; 590 val = bus_space_read_4(sc->sc_bst, sc->sc_bsh, 591 PCIE_REG_STATUS); 592 } 593 } 594 595 pcib_enable_root_mode: 596 if (sc->sc_mode == MV_MODE_ROOT) { 597 /* 598 * Enable PCI bridge. 599 */ 600 val = bus_space_read_4(sc->sc_bst, sc->sc_bsh, PCIR_COMMAND); 601 val |= PCIM_CMD_SERRESPEN | PCIM_CMD_BUSMASTEREN | 602 PCIM_CMD_MEMEN | PCIM_CMD_PORTEN; 603 bus_space_write_4(sc->sc_bst, sc->sc_bsh, PCIR_COMMAND, val); 604 } 605 } 606 607 static int 608 mv_pcib_mem_init(struct mv_pcib_softc *sc) 609 { 610 int err; 611 612 /* 613 * Memory management. 614 */ 615 sc->sc_mem_rman.rm_type = RMAN_ARRAY; 616 err = rman_init(&sc->sc_mem_rman); 617 if (err) 618 return (err); 619 620 sc->sc_io_rman.rm_type = RMAN_ARRAY; 621 err = rman_init(&sc->sc_io_rman); 622 if (err) { 623 rman_fini(&sc->sc_mem_rman); 624 return (err); 625 } 626 627 err = rman_manage_region(&sc->sc_mem_rman, sc->sc_mem_base, 628 sc->sc_mem_base + sc->sc_mem_size - 1); 629 if (err) 630 goto error; 631 632 err = rman_manage_region(&sc->sc_io_rman, sc->sc_io_base, 633 sc->sc_io_base + sc->sc_io_size - 1); 634 if (err) 635 goto error; 636 637 return (0); 638 639 error: 640 rman_fini(&sc->sc_mem_rman); 641 rman_fini(&sc->sc_io_rman); 642 643 return (err); 644 } 645 646 static inline uint32_t 647 pcib_bit_get(uint32_t *map, uint32_t bit) 648 { 649 uint32_t n = bit / BITS_PER_UINT32; 650 651 bit = bit % BITS_PER_UINT32; 652 return (map[n] & (1 << bit)); 653 } 654 655 static inline void 656 pcib_bit_set(uint32_t *map, uint32_t bit) 657 { 658 uint32_t n = bit / BITS_PER_UINT32; 659 660 bit = bit % BITS_PER_UINT32; 661 map[n] |= (1 << bit); 662 } 663 664 static inline uint32_t 665 pcib_map_check(uint32_t *map, uint32_t start, uint32_t bits) 666 { 667 uint32_t i; 668 669 for (i = start; i < start + bits; i++) 670 if (pcib_bit_get(map, i)) 671 return (0); 672 673 return (1); 674 } 675 676 static inline void 677 pcib_map_set(uint32_t *map, uint32_t start, uint32_t bits) 678 { 679 uint32_t i; 680 681 for (i = start; i < start + bits; i++) 682 pcib_bit_set(map, i); 683 } 684 685 /* 686 * The idea of this allocator is taken from ARM No-Cache memory 687 * management code (sys/arm/arm/vm_machdep.c). 688 */ 689 static bus_addr_t 690 pcib_alloc(struct mv_pcib_softc *sc, uint32_t smask) 691 { 692 uint32_t bits, bits_limit, i, *map, min_alloc, size; 693 bus_addr_t addr = 0; 694 bus_addr_t base; 695 696 if (smask & 1) { 697 base = sc->sc_io_base; 698 min_alloc = PCI_MIN_IO_ALLOC; 699 bits_limit = sc->sc_io_size / min_alloc; 700 map = sc->sc_io_map; 701 smask &= ~0x3; 702 } else { 703 base = sc->sc_mem_base; 704 min_alloc = PCI_MIN_MEM_ALLOC; 705 bits_limit = sc->sc_mem_size / min_alloc; 706 map = sc->sc_mem_map; 707 smask &= ~0xF; 708 } 709 710 size = ~smask + 1; 711 bits = size / min_alloc; 712 713 for (i = 0; i + bits <= bits_limit; i += bits) 714 if (pcib_map_check(map, i, bits)) { 715 pcib_map_set(map, i, bits); 716 addr = base + (i * min_alloc); 717 return (addr); 718 } 719 720 return (addr); 721 } 722 723 static int 724 mv_pcib_init_bar(struct mv_pcib_softc *sc, int bus, int slot, int func, 725 int barno) 726 { 727 uint32_t addr, bar; 728 int reg, width; 729 730 reg = PCIR_BAR(barno); 731 732 /* 733 * Need to init the BAR register with 0xffffffff before correct 734 * value can be read. 735 */ 736 mv_pcib_write_config(sc->sc_dev, bus, slot, func, reg, ~0, 4); 737 bar = mv_pcib_read_config(sc->sc_dev, bus, slot, func, reg, 4); 738 if (bar == 0) 739 return (1); 740 741 /* Calculate BAR size: 64 or 32 bit (in 32-bit units) */ 742 width = ((bar & 7) == 4) ? 2 : 1; 743 744 addr = pcib_alloc(sc, bar); 745 if (!addr) 746 return (-1); 747 748 if (bootverbose) 749 printf("PCI %u:%u:%u: reg %x: smask=%08x: addr=%08x\n", 750 bus, slot, func, reg, bar, addr); 751 752 mv_pcib_write_config(sc->sc_dev, bus, slot, func, reg, addr, 4); 753 if (width == 2) 754 mv_pcib_write_config(sc->sc_dev, bus, slot, func, reg + 4, 755 0, 4); 756 757 return (width); 758 } 759 760 static void 761 mv_pcib_init_bridge(struct mv_pcib_softc *sc, int bus, int slot, int func) 762 { 763 bus_addr_t io_base, mem_base; 764 uint32_t io_limit, mem_limit; 765 int secbus; 766 767 io_base = sc->sc_io_base; 768 io_limit = io_base + sc->sc_io_size - 1; 769 mem_base = sc->sc_mem_base; 770 mem_limit = mem_base + sc->sc_mem_size - 1; 771 772 /* Configure I/O decode registers */ 773 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_IOBASEL_1, 774 io_base >> 8, 1); 775 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_IOBASEH_1, 776 io_base >> 16, 2); 777 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_IOLIMITL_1, 778 io_limit >> 8, 1); 779 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_IOLIMITH_1, 780 io_limit >> 16, 2); 781 782 /* Configure memory decode registers */ 783 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_MEMBASE_1, 784 mem_base >> 16, 2); 785 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_MEMLIMIT_1, 786 mem_limit >> 16, 2); 787 788 /* Disable memory prefetch decode */ 789 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_PMBASEL_1, 790 0x10, 2); 791 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_PMBASEH_1, 792 0x0, 4); 793 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_PMLIMITL_1, 794 0xF, 2); 795 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_PMLIMITH_1, 796 0x0, 4); 797 798 secbus = mv_pcib_read_config(sc->sc_dev, bus, slot, func, 799 PCIR_SECBUS_1, 1); 800 801 /* Configure buses behind the bridge */ 802 mv_pcib_init(sc, secbus, PCI_SLOTMAX); 803 } 804 805 static int 806 mv_pcib_init(struct mv_pcib_softc *sc, int bus, int maxslot) 807 { 808 int slot, func, maxfunc, error; 809 uint8_t hdrtype, command, class, subclass; 810 811 for (slot = 0; slot <= maxslot; slot++) { 812 maxfunc = 0; 813 for (func = 0; func <= maxfunc; func++) { 814 hdrtype = mv_pcib_read_config(sc->sc_dev, bus, slot, 815 func, PCIR_HDRTYPE, 1); 816 817 if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE) 818 continue; 819 820 if (func == 0 && (hdrtype & PCIM_MFDEV)) 821 maxfunc = PCI_FUNCMAX; 822 823 command = mv_pcib_read_config(sc->sc_dev, bus, slot, 824 func, PCIR_COMMAND, 1); 825 command &= ~(PCIM_CMD_MEMEN | PCIM_CMD_PORTEN); 826 mv_pcib_write_config(sc->sc_dev, bus, slot, func, 827 PCIR_COMMAND, command, 1); 828 829 error = mv_pcib_init_all_bars(sc, bus, slot, func, 830 hdrtype); 831 832 if (error) 833 return (error); 834 835 command |= PCIM_CMD_BUSMASTEREN | PCIM_CMD_MEMEN | 836 PCIM_CMD_PORTEN; 837 mv_pcib_write_config(sc->sc_dev, bus, slot, func, 838 PCIR_COMMAND, command, 1); 839 840 /* Handle PCI-PCI bridges */ 841 class = mv_pcib_read_config(sc->sc_dev, bus, slot, 842 func, PCIR_CLASS, 1); 843 subclass = mv_pcib_read_config(sc->sc_dev, bus, slot, 844 func, PCIR_SUBCLASS, 1); 845 846 if (class != PCIC_BRIDGE || 847 subclass != PCIS_BRIDGE_PCI) 848 continue; 849 850 mv_pcib_init_bridge(sc, bus, slot, func); 851 } 852 } 853 854 /* Enable all ABCD interrupts */ 855 pcib_write_irq_mask(sc, (0xF << 24)); 856 857 return (0); 858 } 859 860 static int 861 mv_pcib_init_all_bars(struct mv_pcib_softc *sc, int bus, int slot, 862 int func, int hdrtype) 863 { 864 int maxbar, bar, i; 865 866 maxbar = (hdrtype & PCIM_HDRTYPE) ? 0 : 6; 867 bar = 0; 868 869 /* Program the base address registers */ 870 while (bar < maxbar) { 871 i = mv_pcib_init_bar(sc, bus, slot, func, bar); 872 bar += i; 873 if (i < 0) { 874 device_printf(sc->sc_dev, 875 "PCI IO/Memory space exhausted\n"); 876 return (ENOMEM); 877 } 878 } 879 880 return (0); 881 } 882 883 static struct resource * 884 mv_pcib_alloc_resource(device_t dev, device_t child, int type, int *rid, 885 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 886 { 887 struct mv_pcib_softc *sc = device_get_softc(dev); 888 struct rman *rm = NULL; 889 struct resource *res; 890 891 switch (type) { 892 case SYS_RES_IOPORT: 893 rm = &sc->sc_io_rman; 894 break; 895 case SYS_RES_MEMORY: 896 rm = &sc->sc_mem_rman; 897 break; 898 #ifdef PCI_RES_BUS 899 case PCI_RES_BUS: 900 return (pci_domain_alloc_bus(sc->ap_segment, child, rid, start, 901 end, count, flags)); 902 #endif 903 default: 904 return (BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, 905 type, rid, start, end, count, flags)); 906 } 907 908 if (RMAN_IS_DEFAULT_RANGE(start, end)) { 909 start = sc->sc_mem_base; 910 end = sc->sc_mem_base + sc->sc_mem_size - 1; 911 count = sc->sc_mem_size; 912 } 913 914 if ((start < sc->sc_mem_base) || (start + count - 1 != end) || 915 (end > sc->sc_mem_base + sc->sc_mem_size - 1)) 916 return (NULL); 917 918 res = rman_reserve_resource(rm, start, end, count, flags, child); 919 if (res == NULL) 920 return (NULL); 921 922 rman_set_rid(res, *rid); 923 rman_set_bustag(res, fdtbus_bs_tag); 924 rman_set_bushandle(res, start); 925 926 if (flags & RF_ACTIVE) 927 if (bus_activate_resource(child, type, *rid, res)) { 928 rman_release_resource(res); 929 return (NULL); 930 } 931 932 return (res); 933 } 934 935 static int 936 mv_pcib_release_resource(device_t dev, device_t child, int type, int rid, 937 struct resource *res) 938 { 939 #ifdef PCI_RES_BUS 940 struct mv_pcib_softc *sc = device_get_softc(dev); 941 942 if (type == PCI_RES_BUS) 943 return (pci_domain_release_bus(sc->ap_segment, child, rid, res)); 944 #endif 945 if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY) 946 return (BUS_RELEASE_RESOURCE(device_get_parent(dev), child, 947 type, rid, res)); 948 949 return (rman_release_resource(res)); 950 } 951 952 static int 953 mv_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 954 { 955 struct mv_pcib_softc *sc = device_get_softc(dev); 956 957 switch (which) { 958 case PCIB_IVAR_BUS: 959 *result = sc->sc_busnr; 960 return (0); 961 case PCIB_IVAR_DOMAIN: 962 *result = device_get_unit(dev); 963 return (0); 964 } 965 966 return (ENOENT); 967 } 968 969 static int 970 mv_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 971 { 972 struct mv_pcib_softc *sc = device_get_softc(dev); 973 974 switch (which) { 975 case PCIB_IVAR_BUS: 976 sc->sc_busnr = value; 977 return (0); 978 } 979 980 return (ENOENT); 981 } 982 983 static inline void 984 pcib_write_irq_mask(struct mv_pcib_softc *sc, uint32_t mask) 985 { 986 987 if (sc->sc_type != MV_TYPE_PCIE) 988 return; 989 990 bus_space_write_4(sc->sc_bst, sc->sc_bsh, PCIE_REG_IRQ_MASK, mask); 991 } 992 993 static void 994 mv_pcib_hw_cfginit(void) 995 { 996 static int opened = 0; 997 998 if (opened) 999 return; 1000 1001 mtx_init(&pcicfg_mtx, "pcicfg", NULL, MTX_SPIN); 1002 opened = 1; 1003 } 1004 1005 static uint32_t 1006 mv_pcib_hw_cfgread(struct mv_pcib_softc *sc, u_int bus, u_int slot, 1007 u_int func, u_int reg, int bytes) 1008 { 1009 uint32_t addr, data, ca, cd; 1010 1011 ca = (sc->sc_type != MV_TYPE_PCI) ? 1012 PCIE_REG_CFG_ADDR : PCI_REG_CFG_ADDR; 1013 cd = (sc->sc_type != MV_TYPE_PCI) ? 1014 PCIE_REG_CFG_DATA : PCI_REG_CFG_DATA; 1015 addr = PCI_CFG_ENA | PCI_CFG_BUS(bus) | PCI_CFG_DEV(slot) | 1016 PCI_CFG_FUN(func) | PCI_CFG_PCIE_REG(reg); 1017 1018 mtx_lock_spin(&pcicfg_mtx); 1019 bus_space_write_4(sc->sc_bst, sc->sc_bsh, ca, addr); 1020 1021 data = ~0; 1022 switch (bytes) { 1023 case 1: 1024 data = bus_space_read_1(sc->sc_bst, sc->sc_bsh, 1025 cd + (reg & 3)); 1026 break; 1027 case 2: 1028 data = le16toh(bus_space_read_2(sc->sc_bst, sc->sc_bsh, 1029 cd + (reg & 2))); 1030 break; 1031 case 4: 1032 data = le32toh(bus_space_read_4(sc->sc_bst, sc->sc_bsh, 1033 cd)); 1034 break; 1035 } 1036 mtx_unlock_spin(&pcicfg_mtx); 1037 return (data); 1038 } 1039 1040 static void 1041 mv_pcib_hw_cfgwrite(struct mv_pcib_softc *sc, u_int bus, u_int slot, 1042 u_int func, u_int reg, uint32_t data, int bytes) 1043 { 1044 uint32_t addr, ca, cd; 1045 1046 ca = (sc->sc_type != MV_TYPE_PCI) ? 1047 PCIE_REG_CFG_ADDR : PCI_REG_CFG_ADDR; 1048 cd = (sc->sc_type != MV_TYPE_PCI) ? 1049 PCIE_REG_CFG_DATA : PCI_REG_CFG_DATA; 1050 addr = PCI_CFG_ENA | PCI_CFG_BUS(bus) | PCI_CFG_DEV(slot) | 1051 PCI_CFG_FUN(func) | PCI_CFG_PCIE_REG(reg); 1052 1053 mtx_lock_spin(&pcicfg_mtx); 1054 bus_space_write_4(sc->sc_bst, sc->sc_bsh, ca, addr); 1055 1056 switch (bytes) { 1057 case 1: 1058 bus_space_write_1(sc->sc_bst, sc->sc_bsh, 1059 cd + (reg & 3), data); 1060 break; 1061 case 2: 1062 bus_space_write_2(sc->sc_bst, sc->sc_bsh, 1063 cd + (reg & 2), htole16(data)); 1064 break; 1065 case 4: 1066 bus_space_write_4(sc->sc_bst, sc->sc_bsh, 1067 cd, htole32(data)); 1068 break; 1069 } 1070 mtx_unlock_spin(&pcicfg_mtx); 1071 } 1072 1073 static int 1074 mv_pcib_maxslots(device_t dev) 1075 { 1076 struct mv_pcib_softc *sc = device_get_softc(dev); 1077 1078 return ((sc->sc_type != MV_TYPE_PCI) ? 1 : PCI_SLOTMAX); 1079 } 1080 1081 static int 1082 mv_pcib_root_slot(device_t dev, u_int bus, u_int slot, u_int func) 1083 { 1084 struct mv_pcib_softc *sc = device_get_softc(dev); 1085 uint32_t vendor, device; 1086 1087 /* On platforms other than Armada38x, root link is always at slot 0 */ 1088 if (!sc->sc_enable_find_root_slot) 1089 return (slot == 0); 1090 1091 vendor = mv_pcib_hw_cfgread(sc, bus, slot, func, PCIR_VENDOR, 1092 PCIR_VENDOR_LENGTH); 1093 device = mv_pcib_hw_cfgread(sc, bus, slot, func, PCIR_DEVICE, 1094 PCIR_DEVICE_LENGTH) & MV_DEV_FAMILY_MASK; 1095 1096 return (vendor == PCI_VENDORID_MRVL && device == MV_DEV_ARMADA38X); 1097 } 1098 1099 static uint32_t 1100 mv_pcib_read_config(device_t dev, u_int bus, u_int slot, u_int func, 1101 u_int reg, int bytes) 1102 { 1103 struct mv_pcib_softc *sc = device_get_softc(dev); 1104 1105 /* Return ~0 if link is inactive or trying to read from Root */ 1106 if ((bus_space_read_4(sc->sc_bst, sc->sc_bsh, PCIE_REG_STATUS) & 1107 PCIE_STATUS_LINK_DOWN) || mv_pcib_root_slot(dev, bus, slot, func)) 1108 return (~0U); 1109 1110 return (mv_pcib_hw_cfgread(sc, bus, slot, func, reg, bytes)); 1111 } 1112 1113 static void 1114 mv_pcib_write_config(device_t dev, u_int bus, u_int slot, u_int func, 1115 u_int reg, uint32_t val, int bytes) 1116 { 1117 struct mv_pcib_softc *sc = device_get_softc(dev); 1118 1119 /* Return if link is inactive or trying to write to Root */ 1120 if ((bus_space_read_4(sc->sc_bst, sc->sc_bsh, PCIE_REG_STATUS) & 1121 PCIE_STATUS_LINK_DOWN) || mv_pcib_root_slot(dev, bus, slot, func)) 1122 return; 1123 1124 mv_pcib_hw_cfgwrite(sc, bus, slot, func, reg, val, bytes); 1125 } 1126 1127 static int 1128 mv_pcib_route_interrupt(device_t bus, device_t dev, int pin) 1129 { 1130 struct mv_pcib_softc *sc; 1131 struct ofw_pci_register reg; 1132 uint32_t pintr, mintr[4]; 1133 int icells; 1134 phandle_t iparent; 1135 1136 sc = device_get_softc(bus); 1137 pintr = pin; 1138 1139 /* Fabricate imap information in case this isn't an OFW device */ 1140 bzero(®, sizeof(reg)); 1141 reg.phys_hi = (pci_get_bus(dev) << OFW_PCI_PHYS_HI_BUSSHIFT) | 1142 (pci_get_slot(dev) << OFW_PCI_PHYS_HI_DEVICESHIFT) | 1143 (pci_get_function(dev) << OFW_PCI_PHYS_HI_FUNCTIONSHIFT); 1144 1145 icells = ofw_bus_lookup_imap(ofw_bus_get_node(dev), &sc->sc_pci_iinfo, 1146 ®, sizeof(reg), &pintr, sizeof(pintr), mintr, sizeof(mintr), 1147 &iparent); 1148 if (icells > 0) 1149 return (ofw_bus_map_intr(dev, iparent, icells, mintr)); 1150 1151 /* Maybe it's a real interrupt, not an intpin */ 1152 if (pin > 4) 1153 return (pin); 1154 1155 device_printf(bus, "could not route pin %d for device %d.%d\n", 1156 pin, pci_get_slot(dev), pci_get_function(dev)); 1157 return (PCI_INVALID_IRQ); 1158 } 1159 1160 static int 1161 mv_pcib_decode_win(phandle_t node, struct mv_pcib_softc *sc) 1162 { 1163 struct mv_pci_range io_space, mem_space; 1164 device_t dev; 1165 int error; 1166 1167 dev = sc->sc_dev; 1168 1169 if ((error = mv_pci_ranges(node, &io_space, &mem_space)) != 0) { 1170 device_printf(dev, "could not retrieve 'ranges' data\n"); 1171 return (error); 1172 } 1173 1174 /* Configure CPU decoding windows */ 1175 error = decode_win_cpu_set(sc->sc_win_target, 1176 sc->sc_io_win_attr, io_space.base_parent, io_space.len, ~0); 1177 if (error < 0) { 1178 device_printf(dev, "could not set up CPU decode " 1179 "window for PCI IO\n"); 1180 return (ENXIO); 1181 } 1182 error = decode_win_cpu_set(sc->sc_win_target, 1183 sc->sc_mem_win_attr, mem_space.base_parent, mem_space.len, 1184 mem_space.base_parent); 1185 if (error < 0) { 1186 device_printf(dev, "could not set up CPU decode " 1187 "windows for PCI MEM\n"); 1188 return (ENXIO); 1189 } 1190 1191 sc->sc_io_base = io_space.base_parent; 1192 sc->sc_io_size = io_space.len; 1193 1194 sc->sc_mem_base = mem_space.base_parent; 1195 sc->sc_mem_size = mem_space.len; 1196 1197 return (0); 1198 } 1199 1200 static int 1201 mv_pcib_map_msi(device_t dev, device_t child, int irq, uint64_t *addr, 1202 uint32_t *data) 1203 { 1204 struct mv_pcib_softc *sc; 1205 1206 sc = device_get_softc(dev); 1207 if (!sc->sc_msi_supported) 1208 return (ENOTSUP); 1209 1210 irq = irq - MSI_IRQ; 1211 1212 /* validate parameters */ 1213 if (isclr(&sc->sc_msi_bitmap, irq)) { 1214 device_printf(dev, "invalid MSI 0x%x\n", irq); 1215 return (EINVAL); 1216 } 1217 1218 #if __ARM_ARCH >= 6 1219 mv_msi_data(irq, addr, data); 1220 #endif 1221 1222 debugf("%s: irq: %d addr: %jx data: %x\n", 1223 __func__, irq, *addr, *data); 1224 1225 return (0); 1226 } 1227 1228 static int 1229 mv_pcib_alloc_msi(device_t dev, device_t child, int count, 1230 int maxcount __unused, int *irqs) 1231 { 1232 struct mv_pcib_softc *sc; 1233 u_int start = 0, i; 1234 1235 sc = device_get_softc(dev); 1236 if (!sc->sc_msi_supported) 1237 return (ENOTSUP); 1238 1239 if (powerof2(count) == 0 || count > MSI_IRQ_NUM) 1240 return (EINVAL); 1241 1242 mtx_lock(&sc->sc_msi_mtx); 1243 1244 for (start = 0; (start + count) < MSI_IRQ_NUM; start++) { 1245 for (i = start; i < start + count; i++) { 1246 if (isset(&sc->sc_msi_bitmap, i)) 1247 break; 1248 } 1249 if (i == start + count) 1250 break; 1251 } 1252 1253 if ((start + count) == MSI_IRQ_NUM) { 1254 mtx_unlock(&sc->sc_msi_mtx); 1255 return (ENXIO); 1256 } 1257 1258 for (i = start; i < start + count; i++) { 1259 setbit(&sc->sc_msi_bitmap, i); 1260 *irqs++ = MSI_IRQ + i; 1261 } 1262 debugf("%s: start: %x count: %x\n", __func__, start, count); 1263 1264 mtx_unlock(&sc->sc_msi_mtx); 1265 return (0); 1266 } 1267 1268 static int 1269 mv_pcib_release_msi(device_t dev, device_t child, int count, int *irqs) 1270 { 1271 struct mv_pcib_softc *sc; 1272 u_int i; 1273 1274 sc = device_get_softc(dev); 1275 if(!sc->sc_msi_supported) 1276 return (ENOTSUP); 1277 1278 mtx_lock(&sc->sc_msi_mtx); 1279 1280 for (i = 0; i < count; i++) 1281 clrbit(&sc->sc_msi_bitmap, irqs[i] - MSI_IRQ); 1282 1283 mtx_unlock(&sc->sc_msi_mtx); 1284 return (0); 1285 }
Cache object: 00b970c84ca0739993ec68714046aa28
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