Lines Matching +full:dma +full:- +full:ranges
1 // SPDX-License-Identifier: GPL-2.0
16 #include <linux/dma-direct.h> /* for bus_dma_region */
30 while (na--) in of_dump_addr()
70 cp = of_read_number(range + fna, na - fna); in of_bus_default_map()
72 da = of_read_number(addr + fna, na - fna); in of_bus_default_map()
78 return da - cp; in of_bus_default_map()
87 addr[na - 2] = cpu_to_be32(a >> 32); in of_bus_default_translate()
88 addr[na - 1] = cpu_to_be32(a & 0xffffffffu); in of_bus_default_translate()
116 return of_bus_default_translate(addr + 1, offset, na - 1); in of_bus_default_flags_translate()
163 * "vci" is for the /chaos bridge on 1st-gen PCI powermacs in of_bus_pci_match()
201 * of_pci_range_to_resource - Create a resource from an of_pci_range
207 * Returns -EINVAL if the range cannot be converted to resource.
219 res->flags = range->flags; in of_pci_range_to_resource()
220 res->parent = res->child = res->sibling = NULL; in of_pci_range_to_resource()
221 res->name = np->full_name; in of_pci_range_to_resource()
223 if (res->flags & IORESOURCE_IO) { in of_pci_range_to_resource()
225 err = pci_register_io_range(&np->fwnode, range->cpu_addr, in of_pci_range_to_resource()
226 range->size); in of_pci_range_to_resource()
229 port = pci_address_to_pio(range->cpu_addr); in of_pci_range_to_resource()
230 if (port == (unsigned long)-1) { in of_pci_range_to_resource()
231 err = -EINVAL; in of_pci_range_to_resource()
234 res->start = port; in of_pci_range_to_resource()
237 upper_32_bits(range->cpu_addr)) { in of_pci_range_to_resource()
238 err = -EINVAL; in of_pci_range_to_resource()
242 res->start = range->cpu_addr; in of_pci_range_to_resource()
244 res->end = res->start + range->size - 1; in of_pci_range_to_resource()
248 res->start = (resource_size_t)OF_BAD_ADDR; in of_pci_range_to_resource()
249 res->end = (resource_size_t)OF_BAD_ADDR; in of_pci_range_to_resource()
255 * of_range_to_resource - Create a resource from a ranges entry
257 * @index: the 'ranges' index to convert to a resource
278 return -ENOENT; in of_range_to_resource()
336 .addresses = "assigned-addresses",
358 .name = "default-flags",
394 static int quirk_state = -1; in of_empty_ranges_quirk()
396 /* PA-SEMI sdc DT bug */ in of_empty_ranges_quirk()
397 if (of_device_is_compatible(np, "1682m-sdc")) in of_empty_ranges_quirk()
414 const __be32 *ranges; in of_translate_one() local
420 * Normally, an absence of a "ranges" property means we are in of_translate_one()
421 * crossing a non-translatable boundary, and thus the addresses in of_translate_one()
424 * what Apple understood, and they do have things like /uni-n or in of_translate_one()
425 * /ht nodes with no "ranges" property and a lot of perfectly in of_translate_one()
427 * "ranges" as equivalent to an empty "ranges" property which means in of_translate_one()
430 * the first place. --BenH. in of_translate_one()
433 * This code is only enabled on powerpc. --gcl in of_translate_one()
435 * This quirk also applies for 'dma-ranges' which frequently exist in in of_translate_one()
436 * child nodes without 'dma-ranges' in the parent nodes. --RobH in of_translate_one()
438 ranges = of_get_property(parent, rprop, &rlen); in of_translate_one()
439 if (ranges == NULL && !of_empty_ranges_quirk(parent) && in of_translate_one()
440 strcmp(rprop, "dma-ranges")) { in of_translate_one()
441 pr_debug("no ranges; cannot translate\n"); in of_translate_one()
444 if (ranges == NULL || rlen == 0) { in of_translate_one()
447 pr_debug("empty ranges; 1:1 translation\n"); in of_translate_one()
451 pr_debug("walking ranges...\n"); in of_translate_one()
453 /* Now walk through the ranges */ in of_translate_one()
456 for (; rlen >= rone; rlen -= rone, ranges += rone) { in of_translate_one()
457 offset = bus->map(addr, ranges, na, ns, pna, bus->flag_cells); in of_translate_one()
465 memcpy(addr, ranges + na, 4 * pna); in of_translate_one()
472 return pbus->translate(addr, offset, pna); in of_translate_one()
476 * Translate an address from the device-tree into a CPU physical address,
480 * Note: We consider that crossing any level with #size-cells == 0 to mean
513 bus->count_cells(dev, &na, &ns); in __of_translate_address()
521 bus->name, na, ns, parent); in __of_translate_address()
541 * For indirectIO device which has no ranges property, get in __of_translate_address()
544 iorange = find_io_range_by_fwnode(&dev->fwnode); in __of_translate_address()
545 if (iorange && (iorange->flags != LOGIC_PIO_CPU_MMIO)) { in __of_translate_address()
546 result = of_read_number(addr + 1, na - 1); in __of_translate_address()
555 pbus->count_cells(dev, &pna, &pns); in __of_translate_address()
562 pbus->name, pna, pns, parent); in __of_translate_address()
588 in_addr, "ranges", &host); in of_translate_address()
604 index = of_property_match_string(np, "interconnect-names", "dma-mem"); in __of_get_dma_parent()
609 "#interconnect-cells", in __of_get_dma_parent()
634 in_addr, "dma-ranges", &host); in of_translate_dma_address()
646 * of_translate_dma_region - Translate device tree address and size tuple
649 * @start: return value for the start of the DMA range
650 * @length: return value for the length of the DMA range
652 * Returns a pointer to the cell immediately following the translated DMA region.
700 if (strcmp(bus->name, "pci") && (bar_no >= 0)) { in __of_get_address()
704 bus->count_cells(dev, &na, &ns); in __of_get_address()
709 /* Get "reg" or "assigned-addresses" property */ in __of_get_address()
710 prop = of_get_property(dev, bus->addresses, &psize); in __of_get_address()
716 for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++) { in __of_get_address()
724 *flags = bus->get_flags(prop); in __of_get_address()
733 * of_property_read_reg - Retrieve the specified "reg" entry index without translating
739 * Returns -EINVAL if "reg" is not found. Returns 0 on success with addr and
747 return -EINVAL; in of_property_read_reg()
760 parser->node = node; in parser_init()
761 parser->pna = of_n_addr_cells(node); in parser_init()
762 parser->na = of_bus_n_addr_cells(node); in parser_init()
763 parser->ns = of_bus_n_size_cells(node); in parser_init()
764 parser->dma = !strcmp(name, "dma-ranges"); in parser_init()
765 parser->bus = of_match_bus(node); in parser_init()
767 parser->range = of_get_property(node, name, &rlen); in parser_init()
768 if (parser->range == NULL) in parser_init()
769 return -ENOENT; in parser_init()
771 parser->end = parser->range + rlen / sizeof(__be32); in parser_init()
779 return parser_init(parser, node, "ranges"); in of_pci_range_parser_init()
786 return parser_init(parser, node, "dma-ranges"); in of_pci_dma_range_parser_init()
794 int na = parser->na; in of_pci_range_parser_one()
795 int ns = parser->ns; in of_pci_range_parser_one()
796 int np = parser->pna + na + ns; in of_pci_range_parser_one()
797 int busflag_na = parser->bus->flag_cells; in of_pci_range_parser_one()
802 if (!parser->range || parser->range + np > parser->end) in of_pci_range_parser_one()
805 range->flags = parser->bus->get_flags(parser->range); in of_pci_range_parser_one()
807 range->bus_addr = of_read_number(parser->range + busflag_na, na - busflag_na); in of_pci_range_parser_one()
809 if (parser->dma) in of_pci_range_parser_one()
810 range->cpu_addr = of_translate_dma_address(parser->node, in of_pci_range_parser_one()
811 parser->range + na); in of_pci_range_parser_one()
813 range->cpu_addr = of_translate_address(parser->node, in of_pci_range_parser_one()
814 parser->range + na); in of_pci_range_parser_one()
815 range->size = of_read_number(parser->range + parser->pna + na, ns); in of_pci_range_parser_one()
817 parser->range += np; in of_pci_range_parser_one()
820 while (parser->range + np <= parser->end) { in of_pci_range_parser_one()
824 flags = parser->bus->get_flags(parser->range); in of_pci_range_parser_one()
825 bus_addr = of_read_number(parser->range + busflag_na, na - busflag_na); in of_pci_range_parser_one()
826 if (parser->dma) in of_pci_range_parser_one()
827 cpu_addr = of_translate_dma_address(parser->node, in of_pci_range_parser_one()
828 parser->range + na); in of_pci_range_parser_one()
830 cpu_addr = of_translate_address(parser->node, in of_pci_range_parser_one()
831 parser->range + na); in of_pci_range_parser_one()
832 size = of_read_number(parser->range + parser->pna + na, ns); in of_pci_range_parser_one()
834 if (flags != range->flags) in of_pci_range_parser_one()
836 if (bus_addr != range->bus_addr + range->size || in of_pci_range_parser_one()
837 cpu_addr != range->cpu_addr + range->size) in of_pci_range_parser_one()
840 range->size += size; in of_pci_range_parser_one()
841 parser->range += np; in of_pci_range_parser_one()
856 in_addr, "ranges", &host); in of_translate_ioport()
858 /* host-specific port access */ in of_translate_ioport()
859 port = logic_pio_trans_hwaddr(&host->fwnode, taddr, size); in of_translate_ioport()
862 /* memory-mapped I/O range */ in of_translate_ioport()
866 if (port == (unsigned long)-1) in of_translate_ioport()
874 * of_dma_get_range - Get DMA range info and put it into a map array
875 * @np: device node to get DMA range info
876 * @map: dma range structure to return
878 * Look in bottom up direction for the first "dma-ranges" property
879 * and parse it. Put the information into a DMA offset map array.
881 * dma-ranges format:
882 * DMA addr (dma_addr) : naddr cells
886 * It returns -ENODEV if "dma-ranges" property was not found for this
892 const __be32 *ranges = NULL; in of_dma_get_range() local
901 ranges = of_get_property(node, "dma-ranges", &len); in of_dma_get_range()
903 /* Ignore empty ranges, they imply no translation required */ in of_dma_get_range()
904 if (ranges && len > 0) in of_dma_get_range()
907 /* Once we find 'dma-ranges', then a missing one is an error */ in of_dma_get_range()
908 if (found_dma_ranges && !ranges) { in of_dma_get_range()
909 ret = -ENODEV; in of_dma_get_range()
917 if (!node || !ranges) { in of_dma_get_range()
918 pr_debug("no dma-ranges found for node(%pOF)\n", np); in of_dma_get_range()
919 ret = -ENODEV; in of_dma_get_range()
926 pr_err("translation of DMA address(%llx) to CPU address failed node(%pOF)\n", in of_dma_get_range()
934 ret = -EINVAL; in of_dma_get_range()
940 ret = -ENOMEM; in of_dma_get_range()
945 * Record all info in the generic DMA ranges array for struct device, in of_dma_get_range()
946 * returning an error if we don't find any parsable ranges. in of_dma_get_range()
955 r->cpu_start = range.cpu_addr; in of_dma_get_range()
956 r->dma_start = range.bus_addr; in of_dma_get_range()
957 r->size = range.size; in of_dma_get_range()
967 * of_dma_get_max_cpu_address - Gets highest CPU address suitable for DMA
970 * Gets the highest CPU physical address that is addressable by all DMA masters
971 * in the sub-tree pointed by np, or the whole tree if NULL is passed. If no
972 * DMA constrained device is found, it returns PHYS_ADDR_MAX.
981 const __be32 *ranges; in of_dma_get_max_cpu_address() local
988 ranges = of_get_property(np, "dma-ranges", &len); in of_dma_get_max_cpu_address()
989 if (ranges && len) { in of_dma_get_max_cpu_address()
993 cpu_end = range.cpu_addr + range.size - 1; in of_dma_get_max_cpu_address()
1009 * of_dma_is_coherent - Check if device is coherent
1012 * It returns true if "dma-coherent" property was found
1013 * for this device in the DT, or if DMA is coherent by
1015 * "dma-noncoherent" property was found for this device.
1025 if (of_property_read_bool(node, "dma-coherent")) { in of_dma_is_coherent()
1029 if (of_property_read_bool(node, "dma-noncoherent")) { in of_dma_is_coherent()
1041 * of_mmio_is_nonposted - Check if device uses non-posted MMIO
1044 * Returns true if the "nonposted-mmio" property was found for
1062 nonposted = of_property_read_bool(parent, "nonposted-mmio"); in of_mmio_is_nonposted()
1079 return -EINVAL; in __of_address_to_resource()
1081 /* Get optional "reg-names" property to add a name to a resource */ in __of_address_to_resource()
1083 of_property_read_string_index(dev, "reg-names", index, &name); in __of_address_to_resource()
1090 return -EINVAL; in __of_address_to_resource()
1093 return -EINVAL; in __of_address_to_resource()
1099 r->start = taddr; in __of_address_to_resource()
1100 r->end = taddr + size - 1; in __of_address_to_resource()
1101 r->flags = flags; in __of_address_to_resource()
1102 r->name = name ? name : dev->full_name; in __of_address_to_resource()
1108 * of_address_to_resource - Translate device tree address and return as resource
1113 * Returns -EINVAL if the range cannot be converted to resource.
1123 return __of_address_to_resource(dev, index, -1, r); in of_address_to_resource()
1132 return -ENOSYS; in of_pci_address_to_resource()
1134 return __of_address_to_resource(dev, -1, bar, r); in of_pci_address_to_resource()
1139 * of_iomap - Maps the memory mapped IO for a given device_node
1160 * of_io_request_and_map - Requests a resource and maps the memory mapped IO
1180 return IOMEM_ERR_PTR(-EINVAL); in of_io_request_and_map()
1185 return IOMEM_ERR_PTR(-EBUSY); in of_io_request_and_map()
1194 return IOMEM_ERR_PTR(-ENOMEM); in of_io_request_and_map()