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authorBjorn Helgaas <bhelgaas@google.com>2014-10-01 12:31:23 -0600
committerBjorn Helgaas <bhelgaas@google.com>2014-10-01 12:31:23 -0600
commit07a7cbd3b815ea77b44d4d5bb4260b37d03a358d (patch)
tree7b205e495fff1e1548cac893264cfdfe18ac34dd /drivers/pci/pci.c
parentcc0cb67adb97793e76bf6f1f6e05694f6311cebd (diff)
parentd1e6dc91b532d3d3dbbd0fa356b775ca320dc2c2 (diff)
Merge branch 'pci/host-generic' into next
* pci/host-generic: arm64: Add architectural support for PCI PCI: Add pci_remap_iospace() to map bus I/O resources of/pci: Add support for parsing PCI host bridge resources from DT of/pci: Add pci_get_new_domain_nr() and of_get_pci_domain_nr() PCI: Add generic domain handling of/pci: Fix the conversion of IO ranges into IO resources of/pci: Move of_pci_range_to_resource() to of/address.c ARM: Define PCI_IOBASE as the base of virtual PCI IO space of/pci: Add pci_register_io_range() and pci_pio_to_address() asm-generic/io.h: Fix ioport_map() for !CONFIG_GENERIC_IOMAP Conflicts: drivers/pci/host/pci-tegra.c
Diffstat (limited to 'drivers/pci/pci.c')
-rw-r--r--drivers/pci/pci.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index b7678be7b106..625a4ace10b4 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -2707,6 +2707,37 @@ int pci_request_regions_exclusive(struct pci_dev *pdev, const char *res_name)
}
EXPORT_SYMBOL(pci_request_regions_exclusive);
+/**
+ * pci_remap_iospace - Remap the memory mapped I/O space
+ * @res: Resource describing the I/O space
+ * @phys_addr: physical address of range to be mapped
+ *
+ * Remap the memory mapped I/O space described by the @res
+ * and the CPU physical address @phys_addr into virtual address space.
+ * Only architectures that have memory mapped IO functions defined
+ * (and the PCI_IOBASE value defined) should call this function.
+ */
+int __weak pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr)
+{
+#if defined(PCI_IOBASE) && defined(CONFIG_MMU)
+ unsigned long vaddr = (unsigned long)PCI_IOBASE + res->start;
+
+ if (!(res->flags & IORESOURCE_IO))
+ return -EINVAL;
+
+ if (res->end > IO_SPACE_LIMIT)
+ return -EINVAL;
+
+ return ioremap_page_range(vaddr, vaddr + resource_size(res), phys_addr,
+ pgprot_device(PAGE_KERNEL));
+#else
+ /* this architecture does not have memory mapped I/O space,
+ so this function should never be called */
+ WARN_ONCE(1, "This architecture does not support memory mapped I/O\n");
+ return -ENODEV;
+#endif
+}
+
static void __pci_set_master(struct pci_dev *dev, bool enable)
{
u16 old_cmd, cmd;
@@ -4409,6 +4440,15 @@ static void pci_no_domains(void)
#endif
}
+#ifdef CONFIG_PCI_DOMAINS
+static atomic_t __domain_nr = ATOMIC_INIT(-1);
+
+int pci_get_new_domain_nr(void)
+{
+ return atomic_inc_return(&__domain_nr);
+}
+#endif
+
/**
* pci_ext_cfg_avail - can we access extended PCI config space?
*