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Diffstat (limited to 'arch/powerpc/kernel/io-workarounds.c')
| -rw-r--r-- | arch/powerpc/kernel/io-workarounds.c | 213 |
1 files changed, 0 insertions, 213 deletions
diff --git a/arch/powerpc/kernel/io-workarounds.c b/arch/powerpc/kernel/io-workarounds.c deleted file mode 100644 index 7e89d02a84e1..000000000000 --- a/arch/powerpc/kernel/io-workarounds.c +++ /dev/null @@ -1,213 +0,0 @@ -/* - * Support PCI IO workaround - * - * Copyright (C) 2006 Benjamin Herrenschmidt <benh@kernel.crashing.org> - * IBM, Corp. - * (C) Copyright 2007-2008 TOSHIBA CORPORATION - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#undef DEBUG - -#include <linux/kernel.h> -#include <linux/sched/mm.h> /* for init_mm */ - -#include <asm/io.h> -#include <asm/machdep.h> -#include <asm/pgtable.h> -#include <asm/ppc-pci.h> -#include <asm/io-workarounds.h> -#include <asm/pte-walk.h> - - -#define IOWA_MAX_BUS 8 - -static struct iowa_bus iowa_busses[IOWA_MAX_BUS]; -static unsigned int iowa_bus_count; - -static struct iowa_bus *iowa_pci_find(unsigned long vaddr, unsigned long paddr) -{ - int i, j; - struct resource *res; - unsigned long vstart, vend; - - for (i = 0; i < iowa_bus_count; i++) { - struct iowa_bus *bus = &iowa_busses[i]; - struct pci_controller *phb = bus->phb; - - if (vaddr) { - vstart = (unsigned long)phb->io_base_virt; - vend = vstart + phb->pci_io_size - 1; - if ((vaddr >= vstart) && (vaddr <= vend)) - return bus; - } - - if (paddr) - for (j = 0; j < 3; j++) { - res = &phb->mem_resources[j]; - if (paddr >= res->start && paddr <= res->end) - return bus; - } - } - - return NULL; -} - -#ifdef CONFIG_PPC_INDIRECT_MMIO -struct iowa_bus *iowa_mem_find_bus(const PCI_IO_ADDR addr) -{ - unsigned hugepage_shift; - struct iowa_bus *bus; - int token; - - token = PCI_GET_ADDR_TOKEN(addr); - - if (token && token <= iowa_bus_count) - bus = &iowa_busses[token - 1]; - else { - unsigned long vaddr, paddr; - pte_t *ptep; - - vaddr = (unsigned long)PCI_FIX_ADDR(addr); - if (vaddr < PHB_IO_BASE || vaddr >= PHB_IO_END) - return NULL; - /* - * We won't find huge pages here (iomem). Also can't hit - * a page table free due to init_mm - */ - ptep = find_init_mm_pte(vaddr, &hugepage_shift); - if (ptep == NULL) - paddr = 0; - else { - WARN_ON(hugepage_shift); - paddr = pte_pfn(*ptep) << PAGE_SHIFT; - } - bus = iowa_pci_find(vaddr, paddr); - - if (bus == NULL) - return NULL; - } - - return bus; -} -#else /* CONFIG_PPC_INDIRECT_MMIO */ -struct iowa_bus *iowa_mem_find_bus(const PCI_IO_ADDR addr) -{ - return NULL; -} -#endif /* !CONFIG_PPC_INDIRECT_MMIO */ - -#ifdef CONFIG_PPC_INDIRECT_PIO -struct iowa_bus *iowa_pio_find_bus(unsigned long port) -{ - unsigned long vaddr = (unsigned long)pci_io_base + port; - return iowa_pci_find(vaddr, 0); -} -#else -struct iowa_bus *iowa_pio_find_bus(unsigned long port) -{ - return NULL; -} -#endif - -#define DEF_PCI_AC_RET(name, ret, at, al, space, aa) \ -static ret iowa_##name at \ -{ \ - struct iowa_bus *bus; \ - bus = iowa_##space##_find_bus(aa); \ - if (bus && bus->ops && bus->ops->name) \ - return bus->ops->name al; \ - return __do_##name al; \ -} - -#define DEF_PCI_AC_NORET(name, at, al, space, aa) \ -static void iowa_##name at \ -{ \ - struct iowa_bus *bus; \ - bus = iowa_##space##_find_bus(aa); \ - if (bus && bus->ops && bus->ops->name) { \ - bus->ops->name al; \ - return; \ - } \ - __do_##name al; \ -} - -#include <asm/io-defs.h> - -#undef DEF_PCI_AC_RET -#undef DEF_PCI_AC_NORET - -static const struct ppc_pci_io iowa_pci_io = { - -#define DEF_PCI_AC_RET(name, ret, at, al, space, aa) .name = iowa_##name, -#define DEF_PCI_AC_NORET(name, at, al, space, aa) .name = iowa_##name, - -#include <asm/io-defs.h> - -#undef DEF_PCI_AC_RET -#undef DEF_PCI_AC_NORET - -}; - -#ifdef CONFIG_PPC_INDIRECT_MMIO -static void __iomem *iowa_ioremap(phys_addr_t addr, unsigned long size, - pgprot_t prot, void *caller) -{ - struct iowa_bus *bus; - void __iomem *res = __ioremap_caller(addr, size, prot, caller); - int busno; - - bus = iowa_pci_find(0, (unsigned long)addr); - if (bus != NULL) { - busno = bus - iowa_busses; - PCI_SET_ADDR_TOKEN(res, busno + 1); - } - return res; -} -#else /* CONFIG_PPC_INDIRECT_MMIO */ -#define iowa_ioremap NULL -#endif /* !CONFIG_PPC_INDIRECT_MMIO */ - -/* Enable IO workaround */ -static void io_workaround_init(void) -{ - static int io_workaround_inited; - - if (io_workaround_inited) - return; - ppc_pci_io = iowa_pci_io; - ppc_md.ioremap = iowa_ioremap; - io_workaround_inited = 1; -} - -/* Register new bus to support workaround */ -void iowa_register_bus(struct pci_controller *phb, struct ppc_pci_io *ops, - int (*initfunc)(struct iowa_bus *, void *), void *data) -{ - struct iowa_bus *bus; - struct device_node *np = phb->dn; - - io_workaround_init(); - - if (iowa_bus_count >= IOWA_MAX_BUS) { - pr_err("IOWA:Too many pci bridges, " - "workarounds disabled for %pOF\n", np); - return; - } - - bus = &iowa_busses[iowa_bus_count]; - bus->phb = phb; - bus->ops = ops; - bus->private = data; - - if (initfunc) - if ((*initfunc)(bus, data)) - return; - - iowa_bus_count++; - - pr_debug("IOWA:[%d]Add bus, %pOF.\n", iowa_bus_count-1, np); -} - |