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authorDavid Woodhouse <dwmw@amazon.co.uk>2017-04-12 15:26:07 +0300
committerBjorn Helgaas <bhelgaas@google.com>2017-04-20 16:47:47 +0300
commit5c2d5ce2ab4bd716b2125f15b2e0879143ac0563 (patch)
tree3b1f3e56c1a59c3390518e64e73bf548d51cbbf4
parent69c701ec1f97315dc0f482699f370887448e150e (diff)
downloadlinux-5c2d5ce2ab4bd716b2125f15b2e0879143ac0563.tar.xz
x86/PCI: Use generic pci_mmap_resource_range()
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
-rw-r--r--arch/x86/include/asm/pci.h1
-rw-r--r--arch/x86/pci/i386.c48
2 files changed, 1 insertions, 48 deletions
diff --git a/arch/x86/include/asm/pci.h b/arch/x86/include/asm/pci.h
index 734cc9411b3a..f513cc231151 100644
--- a/arch/x86/include/asm/pci.h
+++ b/arch/x86/include/asm/pci.h
@@ -104,6 +104,7 @@ int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
#define HAVE_PCI_MMAP
#define arch_can_pci_mmap_wc() pat_enabled()
+#define ARCH_GENERIC_PCI_MMAP_RESOURCE
#ifdef CONFIG_PCI
extern void early_quirks(void);
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c
index 8ca5e5d9f251..68499cf82ccf 100644
--- a/arch/x86/pci/i386.c
+++ b/arch/x86/pci/i386.c
@@ -406,51 +406,3 @@ void __init pcibios_resource_survey(void)
*/
ioapic_insert_resources();
}
-
-static const struct vm_operations_struct pci_mmap_ops = {
- .access = generic_access_phys,
-};
-
-int pci_mmap_page_range(struct pci_dev *dev, int bar,
- struct vm_area_struct *vma,
- enum pci_mmap_state mmap_state, int write_combine)
-{
- unsigned long prot;
-
- /* I/O space cannot be accessed via normal processor loads and
- * stores on this platform.
- */
- if (mmap_state == pci_mmap_io)
- return -EINVAL;
-
- prot = pgprot_val(vma->vm_page_prot);
-
- /*
- * Return error if pat is not enabled and write_combine is requested.
- * Caller can followup with UC MINUS request and add a WC mtrr if there
- * is a free mtrr slot.
- */
- if (!pat_enabled() && write_combine)
- return -EINVAL;
-
- if (pat_enabled() && write_combine)
- prot |= cachemode2protval(_PAGE_CACHE_MODE_WC);
- else if (pat_enabled() || boot_cpu_data.x86 > 3)
- /*
- * ioremap() and ioremap_nocache() defaults to UC MINUS for now.
- * To avoid attribute conflicts, request UC MINUS here
- * as well.
- */
- prot |= cachemode2protval(_PAGE_CACHE_MODE_UC_MINUS);
-
- vma->vm_page_prot = __pgprot(prot);
-
- if (io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
- vma->vm_end - vma->vm_start,
- vma->vm_page_prot))
- return -EAGAIN;
-
- vma->vm_ops = &pci_mmap_ops;
-
- return 0;
-}