^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) #include <linux/range.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include "bus_numa.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) LIST_HEAD(pci_root_infos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) static struct pci_root_info *x86_find_pci_root_info(int bus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) struct pci_root_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) list_for_each_entry(info, &pci_root_infos, list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) if (info->busn.start == bus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) return info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) int x86_pci_root_bus_node(int bus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct pci_root_info *info = x86_find_pci_root_info(bus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) if (!info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) return NUMA_NO_NODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) return info->node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) void x86_pci_root_bus_resources(int bus, struct list_head *resources)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct pci_root_info *info = x86_find_pci_root_info(bus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct pci_root_res *root_res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct resource_entry *window;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) bool found = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) if (!info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) goto default_resources;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) printk(KERN_DEBUG "PCI: root bus %02x: hardware-probed resources\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) bus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) /* already added by acpi ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) resource_list_for_each_entry(window, resources)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) if (window->res->flags & IORESOURCE_BUS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) found = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) if (!found)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) pci_add_resource(resources, &info->busn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) list_for_each_entry(root_res, &info->resources, list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) pci_add_resource(resources, &root_res->res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) default_resources:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * We don't have any host bridge aperture information from the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * "native host bridge drivers," e.g., amd_bus or broadcom_bus,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * so fall back to the defaults historically used by pci_create_bus().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) printk(KERN_DEBUG "PCI: root bus %02x: using default resources\n", bus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) pci_add_resource(resources, &ioport_resource);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) pci_add_resource(resources, &iomem_resource);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) struct pci_root_info __init *alloc_pci_root_info(int bus_min, int bus_max,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) int node, int link)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct pci_root_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) info = kzalloc(sizeof(*info), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (!info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) sprintf(info->name, "PCI Bus #%02x", bus_min);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) INIT_LIST_HEAD(&info->resources);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) info->busn.name = info->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) info->busn.start = bus_min;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) info->busn.end = bus_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) info->busn.flags = IORESOURCE_BUS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) info->node = node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) info->link = link;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) list_add_tail(&info->list, &pci_root_infos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) return info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) void update_res(struct pci_root_info *info, resource_size_t start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) resource_size_t end, unsigned long flags, int merge)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) struct pci_root_res *root_res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) if (start > end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (start == MAX_RESOURCE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (!merge)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) goto addit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) /* try to merge it with old one */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) list_for_each_entry(root_res, &info->resources, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) resource_size_t final_start, final_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) resource_size_t common_start, common_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) res = &root_res->res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if (res->flags != flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) common_start = max(res->start, start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) common_end = min(res->end, end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (common_start > common_end + 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) final_start = min(res->start, start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) final_end = max(res->end, end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) res->start = final_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) res->end = final_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) addit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) /* need to add that */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) root_res = kzalloc(sizeof(*root_res), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (!root_res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) res = &root_res->res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) res->name = info->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) res->flags = flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) res->start = start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) res->end = end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) list_add_tail(&root_res->list, &info->resources);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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