^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) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * linux/arch/alpha/kernel/pci-noop.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Stub PCI interfaces for Jensen-specific kernels.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/memblock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/gfp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/capability.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/dma-mapping.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/scatterlist.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/syscalls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "proto.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * The PCI controller list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct pci_controller *hose_head, **hose_tail = &hose_head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct pci_controller *pci_isa_hose;
^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) struct pci_controller * __init
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) alloc_pci_controller(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct pci_controller *hose;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) hose = memblock_alloc(sizeof(*hose), SMP_CACHE_BYTES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) if (!hose)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) panic("%s: Failed to allocate %zu bytes\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) sizeof(*hose));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) *hose_tail = hose;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) hose_tail = &hose->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) return hose;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct resource * __init
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) alloc_resource(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) void *ptr = memblock_alloc(sizeof(struct resource), SMP_CACHE_BYTES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) if (!ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) panic("%s: Failed to allocate %zu bytes\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) sizeof(struct resource));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) return ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) SYSCALL_DEFINE3(pciconfig_iobase, long, which, unsigned long, bus,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) unsigned long, dfn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct pci_controller *hose;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) /* from hose or from bus.devfn */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (which & IOBASE_FROM_HOSE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) for (hose = hose_head; hose; hose = hose->next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) if (hose->index == bus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) if (!hose)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) /* Special hook for ISA access. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (bus == 0 && dfn == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) hose = pci_isa_hose;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) switch (which & ~IOBASE_FROM_HOSE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) case IOBASE_HOSE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return hose->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) case IOBASE_SPARSE_MEM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return hose->sparse_mem_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) case IOBASE_DENSE_MEM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return hose->dense_mem_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) case IOBASE_SPARSE_IO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return hose->sparse_io_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) case IOBASE_DENSE_IO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return hose->dense_io_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) case IOBASE_ROOT_BUS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) return hose->bus->number;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) SYSCALL_DEFINE5(pciconfig_read, unsigned long, bus, unsigned long, dfn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) unsigned long, off, unsigned long, len, void __user *, buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (!capable(CAP_SYS_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) SYSCALL_DEFINE5(pciconfig_write, unsigned long, bus, unsigned long, dfn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) unsigned long, off, unsigned long, len, void __user *, buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) if (!capable(CAP_SYS_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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