1/* 2 * Freescale Management Complex (MC) bus driver 3 * 4 * Copyright (C) 2014 Freescale Semiconductor, Inc. 5 * Author: German Rivera <German.Rivera@freescale.com> 6 * 7 * This file is licensed under the terms of the GNU General Public 8 * License version 2. This program is licensed "as is" without any 9 * warranty of any kind, whether express or implied. 10 */ 11 12#include "../include/mc-private.h" 13#include <linux/module.h> 14#include <linux/of_device.h> 15#include <linux/of_address.h> 16#include <linux/ioport.h> 17#include <linux/slab.h> 18#include <linux/limits.h> 19#include "../include/dpmng.h" 20#include "../include/mc-sys.h" 21#include "dprc-cmd.h" 22 23static struct kmem_cache *mc_dev_cache; 24 25static bool fsl_mc_is_root_dprc(struct device *dev); 26 27/** 28 * fsl_mc_bus_match - device to driver matching callback 29 * @dev: the MC object device structure to match against 30 * @drv: the device driver to search for matching MC object device id 31 * structures 32 * 33 * Returns 1 on success, 0 otherwise. 34 */ 35static int fsl_mc_bus_match(struct device *dev, struct device_driver *drv) 36{ 37 const struct fsl_mc_device_match_id *id; 38 struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev); 39 struct fsl_mc_driver *mc_drv = to_fsl_mc_driver(drv); 40 bool found = false; 41 bool major_version_mismatch = false; 42 bool minor_version_mismatch = false; 43 44 if (WARN_ON(!fsl_mc_bus_exists())) 45 goto out; 46 47 if (!mc_drv->match_id_table) 48 goto out; 49 50 /* 51 * If the object is not 'plugged' don't match. 52 * Only exception is the root DPRC, which is a special case. 53 */ 54 if ((mc_dev->obj_desc.state & DPRC_OBJ_STATE_PLUGGED) == 0 && 55 !fsl_mc_is_root_dprc(&mc_dev->dev)) 56 goto out; 57 58 /* 59 * Traverse the match_id table of the given driver, trying to find 60 * a matching for the given MC object device. 61 */ 62 for (id = mc_drv->match_id_table; id->vendor != 0x0; id++) { 63 if (id->vendor == mc_dev->obj_desc.vendor && 64 strcmp(id->obj_type, mc_dev->obj_desc.type) == 0) { 65 if (id->ver_major == mc_dev->obj_desc.ver_major) { 66 found = true; 67 if (id->ver_minor != mc_dev->obj_desc.ver_minor) 68 minor_version_mismatch = true; 69 } else { 70 major_version_mismatch = true; 71 } 72 73 break; 74 } 75 } 76 77 if (major_version_mismatch) { 78 dev_warn(dev, 79 "Major version mismatch: driver version %u.%u, MC object version %u.%u\n", 80 id->ver_major, id->ver_minor, 81 mc_dev->obj_desc.ver_major, 82 mc_dev->obj_desc.ver_minor); 83 } else if (minor_version_mismatch) { 84 dev_warn(dev, 85 "Minor version mismatch: driver version %u.%u, MC object version %u.%u\n", 86 id->ver_major, id->ver_minor, 87 mc_dev->obj_desc.ver_major, 88 mc_dev->obj_desc.ver_minor); 89 } 90 91out: 92 dev_dbg(dev, "%smatched\n", found ? "" : "not "); 93 return found; 94} 95 96/** 97 * fsl_mc_bus_uevent - callback invoked when a device is added 98 */ 99static int fsl_mc_bus_uevent(struct device *dev, struct kobj_uevent_env *env) 100{ 101 pr_debug("%s invoked\n", __func__); 102 return 0; 103} 104 105struct bus_type fsl_mc_bus_type = { 106 .name = "fsl-mc", 107 .match = fsl_mc_bus_match, 108 .uevent = fsl_mc_bus_uevent, 109}; 110EXPORT_SYMBOL_GPL(fsl_mc_bus_type); 111 112static atomic_t root_dprc_count = ATOMIC_INIT(0); 113 114static int fsl_mc_driver_probe(struct device *dev) 115{ 116 struct fsl_mc_driver *mc_drv; 117 struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev); 118 int error; 119 120 if (WARN_ON(!dev->driver)) 121 return -EINVAL; 122 123 mc_drv = to_fsl_mc_driver(dev->driver); 124 if (WARN_ON(!mc_drv->probe)) 125 return -EINVAL; 126 127 error = mc_drv->probe(mc_dev); 128 if (error < 0) { 129 dev_err(dev, "MC object device probe callback failed: %d\n", 130 error); 131 return error; 132 } 133 134 return 0; 135} 136 137static int fsl_mc_driver_remove(struct device *dev) 138{ 139 struct fsl_mc_driver *mc_drv = to_fsl_mc_driver(dev->driver); 140 struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev); 141 int error; 142 143 if (WARN_ON(!dev->driver)) 144 return -EINVAL; 145 146 error = mc_drv->remove(mc_dev); 147 if (error < 0) { 148 dev_err(dev, 149 "MC object device remove callback failed: %d\n", 150 error); 151 return error; 152 } 153 154 return 0; 155} 156 157static void fsl_mc_driver_shutdown(struct device *dev) 158{ 159 struct fsl_mc_driver *mc_drv = to_fsl_mc_driver(dev->driver); 160 struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev); 161 162 mc_drv->shutdown(mc_dev); 163} 164 165/** 166 * __fsl_mc_driver_register - registers a child device driver with the 167 * MC bus 168 * 169 * This function is implicitly invoked from the registration function of 170 * fsl_mc device drivers, which is generated by the 171 * module_fsl_mc_driver() macro. 172 */ 173int __fsl_mc_driver_register(struct fsl_mc_driver *mc_driver, 174 struct module *owner) 175{ 176 int error; 177 178 mc_driver->driver.owner = owner; 179 mc_driver->driver.bus = &fsl_mc_bus_type; 180 181 if (mc_driver->probe) 182 mc_driver->driver.probe = fsl_mc_driver_probe; 183 184 if (mc_driver->remove) 185 mc_driver->driver.remove = fsl_mc_driver_remove; 186 187 if (mc_driver->shutdown) 188 mc_driver->driver.shutdown = fsl_mc_driver_shutdown; 189 190 error = driver_register(&mc_driver->driver); 191 if (error < 0) { 192 pr_err("driver_register() failed for %s: %d\n", 193 mc_driver->driver.name, error); 194 return error; 195 } 196 197 pr_info("MC object device driver %s registered\n", 198 mc_driver->driver.name); 199 return 0; 200} 201EXPORT_SYMBOL_GPL(__fsl_mc_driver_register); 202 203/** 204 * fsl_mc_driver_unregister - unregisters a device driver from the 205 * MC bus 206 */ 207void fsl_mc_driver_unregister(struct fsl_mc_driver *mc_driver) 208{ 209 driver_unregister(&mc_driver->driver); 210} 211EXPORT_SYMBOL_GPL(fsl_mc_driver_unregister); 212 213/** 214 * fsl_mc_bus_exists - check if a root dprc exists 215 */ 216bool fsl_mc_bus_exists(void) 217{ 218 return atomic_read(&root_dprc_count) > 0; 219} 220EXPORT_SYMBOL_GPL(fsl_mc_bus_exists); 221 222/** 223* fsl_mc_get_root_dprc - function to traverse to the root dprc 224*/ 225static void fsl_mc_get_root_dprc(struct device *dev, 226 struct device **root_dprc_dev) 227{ 228 if (WARN_ON(!dev)) { 229 *root_dprc_dev = NULL; 230 } else if (WARN_ON(dev->bus != &fsl_mc_bus_type)) { 231 *root_dprc_dev = NULL; 232 } else { 233 *root_dprc_dev = dev; 234 while ((*root_dprc_dev)->parent->bus == &fsl_mc_bus_type) 235 *root_dprc_dev = (*root_dprc_dev)->parent; 236 } 237} 238 239/** 240 * fsl_mc_is_root_dprc - function to check if a given device is a root dprc 241 */ 242static bool fsl_mc_is_root_dprc(struct device *dev) 243{ 244 struct device *root_dprc_dev; 245 246 fsl_mc_get_root_dprc(dev, &root_dprc_dev); 247 if (!root_dprc_dev) 248 return false; 249 else 250 return dev == root_dprc_dev; 251} 252 253static int get_dprc_icid(struct fsl_mc_io *mc_io, 254 int container_id, u16 *icid) 255{ 256 u16 dprc_handle; 257 struct dprc_attributes attr; 258 int error; 259 260 error = dprc_open(mc_io, 0, container_id, &dprc_handle); 261 if (error < 0) { 262 pr_err("dprc_open() failed: %d\n", error); 263 return error; 264 } 265 266 memset(&attr, 0, sizeof(attr)); 267 error = dprc_get_attributes(mc_io, 0, dprc_handle, &attr); 268 if (error < 0) { 269 pr_err("dprc_get_attributes() failed: %d\n", error); 270 goto common_cleanup; 271 } 272 273 *icid = attr.icid; 274 error = 0; 275 276common_cleanup: 277 (void)dprc_close(mc_io, 0, dprc_handle); 278 return error; 279} 280 281static int translate_mc_addr(struct fsl_mc_device *mc_dev, 282 enum dprc_region_type mc_region_type, 283 u64 mc_offset, phys_addr_t *phys_addr) 284{ 285 int i; 286 struct device *root_dprc_dev; 287 struct fsl_mc *mc; 288 289 fsl_mc_get_root_dprc(&mc_dev->dev, &root_dprc_dev); 290 if (WARN_ON(!root_dprc_dev)) 291 return -EINVAL; 292 mc = dev_get_drvdata(root_dprc_dev->parent); 293 294 if (mc->num_translation_ranges == 0) { 295 /* 296 * Do identity mapping: 297 */ 298 *phys_addr = mc_offset; 299 return 0; 300 } 301 302 for (i = 0; i < mc->num_translation_ranges; i++) { 303 struct fsl_mc_addr_translation_range *range = 304 &mc->translation_ranges[i]; 305 306 if (mc_region_type == range->mc_region_type && 307 mc_offset >= range->start_mc_offset && 308 mc_offset < range->end_mc_offset) { 309 *phys_addr = range->start_phys_addr + 310 (mc_offset - range->start_mc_offset); 311 return 0; 312 } 313 } 314 315 return -EFAULT; 316} 317 318static int fsl_mc_device_get_mmio_regions(struct fsl_mc_device *mc_dev, 319 struct fsl_mc_device *mc_bus_dev) 320{ 321 int i; 322 int error; 323 struct resource *regions; 324 struct dprc_obj_desc *obj_desc = &mc_dev->obj_desc; 325 struct device *parent_dev = mc_dev->dev.parent; 326 enum dprc_region_type mc_region_type; 327 328 if (strcmp(obj_desc->type, "dprc") == 0 || 329 strcmp(obj_desc->type, "dpmcp") == 0) { 330 mc_region_type = DPRC_REGION_TYPE_MC_PORTAL; 331 } else if (strcmp(obj_desc->type, "dpio") == 0) { 332 mc_region_type = DPRC_REGION_TYPE_QBMAN_PORTAL; 333 } else { 334 /* 335 * This function should not have been called for this MC object 336 * type, as this object type is not supposed to have MMIO 337 * regions 338 */ 339 WARN_ON(true); 340 return -EINVAL; 341 } 342 343 regions = kmalloc_array(obj_desc->region_count, 344 sizeof(regions[0]), GFP_KERNEL); 345 if (!regions) 346 return -ENOMEM; 347 348 for (i = 0; i < obj_desc->region_count; i++) { 349 struct dprc_region_desc region_desc; 350 351 error = dprc_get_obj_region(mc_bus_dev->mc_io, 352 0, 353 mc_bus_dev->mc_handle, 354 obj_desc->type, 355 obj_desc->id, i, ®ion_desc); 356 if (error < 0) { 357 dev_err(parent_dev, 358 "dprc_get_obj_region() failed: %d\n", error); 359 goto error_cleanup_regions; 360 } 361 362 WARN_ON(region_desc.size == 0); 363 error = translate_mc_addr(mc_dev, mc_region_type, 364 region_desc.base_offset, 365 ®ions[i].start); 366 if (error < 0) { 367 dev_err(parent_dev, 368 "Invalid MC offset: %#x (for %s.%d\'s region %d)\n", 369 region_desc.base_offset, 370 obj_desc->type, obj_desc->id, i); 371 goto error_cleanup_regions; 372 } 373 374 regions[i].end = regions[i].start + region_desc.size - 1; 375 regions[i].name = "fsl-mc object MMIO region"; 376 regions[i].flags = IORESOURCE_IO; 377 } 378 379 mc_dev->regions = regions; 380 return 0; 381 382error_cleanup_regions: 383 kfree(regions); 384 return error; 385} 386 387/** 388 * Add a newly discovered MC object device to be visible in Linux 389 */ 390int fsl_mc_device_add(struct dprc_obj_desc *obj_desc, 391 struct fsl_mc_io *mc_io, 392 struct device *parent_dev, 393 struct fsl_mc_device **new_mc_dev) 394{ 395 int error; 396 struct fsl_mc_device *mc_dev = NULL; 397 struct fsl_mc_bus *mc_bus = NULL; 398 struct fsl_mc_device *parent_mc_dev; 399 400 if (parent_dev->bus == &fsl_mc_bus_type) 401 parent_mc_dev = to_fsl_mc_device(parent_dev); 402 else 403 parent_mc_dev = NULL; 404 405 if (strcmp(obj_desc->type, "dprc") == 0) { 406 /* 407 * Allocate an MC bus device object: 408 */ 409 mc_bus = devm_kzalloc(parent_dev, sizeof(*mc_bus), GFP_KERNEL); 410 if (!mc_bus) 411 return -ENOMEM; 412 413 mc_dev = &mc_bus->mc_dev; 414 } else { 415 /* 416 * Allocate a regular fsl_mc_device object: 417 */ 418 mc_dev = kmem_cache_zalloc(mc_dev_cache, GFP_KERNEL); 419 if (!mc_dev) 420 return -ENOMEM; 421 } 422 423 mc_dev->obj_desc = *obj_desc; 424 mc_dev->mc_io = mc_io; 425 device_initialize(&mc_dev->dev); 426 mc_dev->dev.parent = parent_dev; 427 mc_dev->dev.bus = &fsl_mc_bus_type; 428 dev_set_name(&mc_dev->dev, "%s.%d", obj_desc->type, obj_desc->id); 429 430 if (strcmp(obj_desc->type, "dprc") == 0) { 431 struct fsl_mc_io *mc_io2; 432 433 mc_dev->flags |= FSL_MC_IS_DPRC; 434 435 /* 436 * To get the DPRC's ICID, we need to open the DPRC 437 * in get_dprc_icid(). For child DPRCs, we do so using the 438 * parent DPRC's MC portal instead of the child DPRC's MC 439 * portal, in case the child DPRC is already opened with 440 * its own portal (e.g., the DPRC used by AIOP). 441 * 442 * NOTE: There cannot be more than one active open for a 443 * given MC object, using the same MC portal. 444 */ 445 if (parent_mc_dev) { 446 /* 447 * device being added is a child DPRC device 448 */ 449 mc_io2 = parent_mc_dev->mc_io; 450 } else { 451 /* 452 * device being added is the root DPRC device 453 */ 454 if (WARN_ON(!mc_io)) { 455 error = -EINVAL; 456 goto error_cleanup_dev; 457 } 458 459 mc_io2 = mc_io; 460 461 atomic_inc(&root_dprc_count); 462 } 463 464 error = get_dprc_icid(mc_io2, obj_desc->id, &mc_dev->icid); 465 if (error < 0) 466 goto error_cleanup_dev; 467 } else { 468 /* 469 * A non-DPRC MC object device has to be a child of another 470 * MC object (specifically a DPRC object) 471 */ 472 mc_dev->icid = parent_mc_dev->icid; 473 mc_dev->dma_mask = FSL_MC_DEFAULT_DMA_MASK; 474 mc_dev->dev.dma_mask = &mc_dev->dma_mask; 475 } 476 477 /* 478 * Get MMIO regions for the device from the MC: 479 * 480 * NOTE: the root DPRC is a special case as its MMIO region is 481 * obtained from the device tree 482 */ 483 if (parent_mc_dev && obj_desc->region_count != 0) { 484 error = fsl_mc_device_get_mmio_regions(mc_dev, 485 parent_mc_dev); 486 if (error < 0) 487 goto error_cleanup_dev; 488 } 489 490 /* 491 * The device-specific probe callback will get invoked by device_add() 492 */ 493 error = device_add(&mc_dev->dev); 494 if (error < 0) { 495 dev_err(parent_dev, 496 "device_add() failed for device %s: %d\n", 497 dev_name(&mc_dev->dev), error); 498 goto error_cleanup_dev; 499 } 500 501 (void)get_device(&mc_dev->dev); 502 dev_dbg(parent_dev, "Added MC object device %s\n", 503 dev_name(&mc_dev->dev)); 504 505 *new_mc_dev = mc_dev; 506 return 0; 507 508error_cleanup_dev: 509 kfree(mc_dev->regions); 510 if (mc_bus) 511 devm_kfree(parent_dev, mc_bus); 512 else 513 kmem_cache_free(mc_dev_cache, mc_dev); 514 515 return error; 516} 517EXPORT_SYMBOL_GPL(fsl_mc_device_add); 518 519/** 520 * fsl_mc_device_remove - Remove a MC object device from being visible to 521 * Linux 522 * 523 * @mc_dev: Pointer to a MC object device object 524 */ 525void fsl_mc_device_remove(struct fsl_mc_device *mc_dev) 526{ 527 struct fsl_mc_bus *mc_bus = NULL; 528 529 kfree(mc_dev->regions); 530 531 /* 532 * The device-specific remove callback will get invoked by device_del() 533 */ 534 device_del(&mc_dev->dev); 535 put_device(&mc_dev->dev); 536 537 if (strcmp(mc_dev->obj_desc.type, "dprc") == 0) { 538 mc_bus = to_fsl_mc_bus(mc_dev); 539 if (mc_dev->mc_io) { 540 fsl_destroy_mc_io(mc_dev->mc_io); 541 mc_dev->mc_io = NULL; 542 } 543 544 if (fsl_mc_is_root_dprc(&mc_dev->dev)) { 545 if (atomic_read(&root_dprc_count) > 0) 546 atomic_dec(&root_dprc_count); 547 else 548 WARN_ON(1); 549 } 550 } 551 552 if (mc_bus) 553 devm_kfree(mc_dev->dev.parent, mc_bus); 554 else 555 kmem_cache_free(mc_dev_cache, mc_dev); 556} 557EXPORT_SYMBOL_GPL(fsl_mc_device_remove); 558 559static int parse_mc_ranges(struct device *dev, 560 int *paddr_cells, 561 int *mc_addr_cells, 562 int *mc_size_cells, 563 const __be32 **ranges_start, 564 u8 *num_ranges) 565{ 566 const __be32 *prop; 567 int range_tuple_cell_count; 568 int ranges_len; 569 int tuple_len; 570 struct device_node *mc_node = dev->of_node; 571 572 *ranges_start = of_get_property(mc_node, "ranges", &ranges_len); 573 if (!(*ranges_start) || !ranges_len) { 574 dev_warn(dev, 575 "missing or empty ranges property for device tree node '%s'\n", 576 mc_node->name); 577 578 *num_ranges = 0; 579 return 0; 580 } 581 582 *paddr_cells = of_n_addr_cells(mc_node); 583 584 prop = of_get_property(mc_node, "#address-cells", NULL); 585 if (prop) 586 *mc_addr_cells = be32_to_cpup(prop); 587 else 588 *mc_addr_cells = *paddr_cells; 589 590 prop = of_get_property(mc_node, "#size-cells", NULL); 591 if (prop) 592 *mc_size_cells = be32_to_cpup(prop); 593 else 594 *mc_size_cells = of_n_size_cells(mc_node); 595 596 range_tuple_cell_count = *paddr_cells + *mc_addr_cells + 597 *mc_size_cells; 598 599 tuple_len = range_tuple_cell_count * sizeof(__be32); 600 if (ranges_len % tuple_len != 0) { 601 dev_err(dev, "malformed ranges property '%s'\n", mc_node->name); 602 return -EINVAL; 603 } 604 605 *num_ranges = ranges_len / tuple_len; 606 return 0; 607} 608 609static int get_mc_addr_translation_ranges(struct device *dev, 610 struct fsl_mc_addr_translation_range 611 **ranges, 612 u8 *num_ranges) 613{ 614 int error; 615 int paddr_cells; 616 int mc_addr_cells; 617 int mc_size_cells; 618 int i; 619 const __be32 *ranges_start; 620 const __be32 *cell; 621 622 error = parse_mc_ranges(dev, 623 &paddr_cells, 624 &mc_addr_cells, 625 &mc_size_cells, 626 &ranges_start, 627 num_ranges); 628 if (error < 0) 629 return error; 630 631 if (!(*num_ranges)) { 632 /* 633 * Missing or empty ranges property ("ranges;") for the 634 * 'fsl,qoriq-mc' node. In this case, identity mapping 635 * will be used. 636 */ 637 *ranges = NULL; 638 return 0; 639 } 640 641 *ranges = devm_kcalloc(dev, *num_ranges, 642 sizeof(struct fsl_mc_addr_translation_range), 643 GFP_KERNEL); 644 if (!(*ranges)) 645 return -ENOMEM; 646 647 cell = ranges_start; 648 for (i = 0; i < *num_ranges; ++i) { 649 struct fsl_mc_addr_translation_range *range = &(*ranges)[i]; 650 651 range->mc_region_type = of_read_number(cell, 1); 652 range->start_mc_offset = of_read_number(cell + 1, 653 mc_addr_cells - 1); 654 cell += mc_addr_cells; 655 range->start_phys_addr = of_read_number(cell, paddr_cells); 656 cell += paddr_cells; 657 range->end_mc_offset = range->start_mc_offset + 658 of_read_number(cell, mc_size_cells); 659 660 cell += mc_size_cells; 661 } 662 663 return 0; 664} 665 666/** 667 * fsl_mc_bus_probe - callback invoked when the root MC bus is being 668 * added 669 */ 670static int fsl_mc_bus_probe(struct platform_device *pdev) 671{ 672 struct dprc_obj_desc obj_desc; 673 int error; 674 struct fsl_mc *mc; 675 struct fsl_mc_device *mc_bus_dev = NULL; 676 struct fsl_mc_io *mc_io = NULL; 677 int container_id; 678 phys_addr_t mc_portal_phys_addr; 679 u32 mc_portal_size; 680 struct mc_version mc_version; 681 struct resource res; 682 683 dev_info(&pdev->dev, "Root MC bus device probed"); 684 685 mc = devm_kzalloc(&pdev->dev, sizeof(*mc), GFP_KERNEL); 686 if (!mc) 687 return -ENOMEM; 688 689 platform_set_drvdata(pdev, mc); 690 691 /* 692 * Get physical address of MC portal for the root DPRC: 693 */ 694 error = of_address_to_resource(pdev->dev.of_node, 0, &res); 695 if (error < 0) { 696 dev_err(&pdev->dev, 697 "of_address_to_resource() failed for %s\n", 698 pdev->dev.of_node->full_name); 699 return error; 700 } 701 702 mc_portal_phys_addr = res.start; 703 mc_portal_size = resource_size(&res); 704 error = fsl_create_mc_io(&pdev->dev, mc_portal_phys_addr, 705 mc_portal_size, NULL, 0, &mc_io); 706 if (error < 0) 707 return error; 708 709 error = mc_get_version(mc_io, 0, &mc_version); 710 if (error != 0) { 711 dev_err(&pdev->dev, 712 "mc_get_version() failed with error %d\n", error); 713 goto error_cleanup_mc_io; 714 } 715 716 dev_info(&pdev->dev, 717 "Freescale Management Complex Firmware version: %u.%u.%u\n", 718 mc_version.major, mc_version.minor, mc_version.revision); 719 720 if (mc_version.major < MC_VER_MAJOR) { 721 dev_err(&pdev->dev, 722 "ERROR: MC firmware version not supported by driver (driver version: %u.%u)\n", 723 MC_VER_MAJOR, MC_VER_MINOR); 724 error = -ENOTSUPP; 725 goto error_cleanup_mc_io; 726 } 727 728 if (mc_version.major > MC_VER_MAJOR) { 729 dev_warn(&pdev->dev, 730 "WARNING: driver may not support newer MC firmware features (driver version: %u.%u)\n", 731 MC_VER_MAJOR, MC_VER_MINOR); 732 } 733 734 error = get_mc_addr_translation_ranges(&pdev->dev, 735 &mc->translation_ranges, 736 &mc->num_translation_ranges); 737 if (error < 0) 738 goto error_cleanup_mc_io; 739 740 error = dpmng_get_container_id(mc_io, 0, &container_id); 741 if (error < 0) { 742 dev_err(&pdev->dev, 743 "dpmng_get_container_id() failed: %d\n", error); 744 goto error_cleanup_mc_io; 745 } 746 747 obj_desc.vendor = FSL_MC_VENDOR_FREESCALE; 748 strcpy(obj_desc.type, "dprc"); 749 obj_desc.id = container_id; 750 obj_desc.ver_major = DPRC_VER_MAJOR; 751 obj_desc.ver_minor = DPRC_VER_MINOR; 752 obj_desc.irq_count = 1; 753 obj_desc.region_count = 0; 754 755 error = fsl_mc_device_add(&obj_desc, mc_io, &pdev->dev, &mc_bus_dev); 756 if (error < 0) 757 goto error_cleanup_mc_io; 758 759 mc->root_mc_bus_dev = mc_bus_dev; 760 return 0; 761 762error_cleanup_mc_io: 763 fsl_destroy_mc_io(mc_io); 764 return error; 765} 766 767/** 768 * fsl_mc_bus_remove - callback invoked when the root MC bus is being 769 * removed 770 */ 771static int fsl_mc_bus_remove(struct platform_device *pdev) 772{ 773 struct fsl_mc *mc = platform_get_drvdata(pdev); 774 775 if (WARN_ON(!fsl_mc_is_root_dprc(&mc->root_mc_bus_dev->dev))) 776 return -EINVAL; 777 778 fsl_mc_device_remove(mc->root_mc_bus_dev); 779 dev_info(&pdev->dev, "Root MC bus device removed"); 780 return 0; 781} 782 783static const struct of_device_id fsl_mc_bus_match_table[] = { 784 {.compatible = "fsl,qoriq-mc",}, 785 {}, 786}; 787 788MODULE_DEVICE_TABLE(of, fsl_mc_bus_match_table); 789 790static struct platform_driver fsl_mc_bus_driver = { 791 .driver = { 792 .name = "fsl_mc_bus", 793 .owner = THIS_MODULE, 794 .pm = NULL, 795 .of_match_table = fsl_mc_bus_match_table, 796 }, 797 .probe = fsl_mc_bus_probe, 798 .remove = fsl_mc_bus_remove, 799}; 800 801static int __init fsl_mc_bus_driver_init(void) 802{ 803 int error; 804 805 mc_dev_cache = kmem_cache_create("fsl_mc_device", 806 sizeof(struct fsl_mc_device), 0, 0, 807 NULL); 808 if (!mc_dev_cache) { 809 pr_err("Could not create fsl_mc_device cache\n"); 810 return -ENOMEM; 811 } 812 813 error = bus_register(&fsl_mc_bus_type); 814 if (error < 0) { 815 pr_err("fsl-mc bus type registration failed: %d\n", error); 816 goto error_cleanup_cache; 817 } 818 819 pr_info("fsl-mc bus type registered\n"); 820 821 error = platform_driver_register(&fsl_mc_bus_driver); 822 if (error < 0) { 823 pr_err("platform_driver_register() failed: %d\n", error); 824 goto error_cleanup_bus; 825 } 826 827 error = dprc_driver_init(); 828 if (error < 0) 829 goto error_cleanup_driver; 830 831 error = fsl_mc_allocator_driver_init(); 832 if (error < 0) 833 goto error_cleanup_dprc_driver; 834 835 return 0; 836 837error_cleanup_dprc_driver: 838 dprc_driver_exit(); 839 840error_cleanup_driver: 841 platform_driver_unregister(&fsl_mc_bus_driver); 842 843error_cleanup_bus: 844 bus_unregister(&fsl_mc_bus_type); 845 846error_cleanup_cache: 847 kmem_cache_destroy(mc_dev_cache); 848 return error; 849} 850 851postcore_initcall(fsl_mc_bus_driver_init); 852 853static void __exit fsl_mc_bus_driver_exit(void) 854{ 855 if (WARN_ON(!mc_dev_cache)) 856 return; 857 858 fsl_mc_allocator_driver_exit(); 859 dprc_driver_exit(); 860 platform_driver_unregister(&fsl_mc_bus_driver); 861 bus_unregister(&fsl_mc_bus_type); 862 kmem_cache_destroy(mc_dev_cache); 863 pr_info("MC bus unregistered\n"); 864} 865 866module_exit(fsl_mc_bus_driver_exit); 867 868MODULE_AUTHOR("Freescale Semiconductor Inc."); 869MODULE_DESCRIPTION("Freescale Management Complex (MC) bus driver"); 870MODULE_LICENSE("GPL"); 871