MIPS: PCI: Use pci_resource_to_user to map pci memory space properly

[[e-mail]: This only matters to Alchemy platforms. On other
platforms fixup_bigphys_addr is just an identidy mapping.]

Signed-off-by: Wolfgang Grandegger <[e-mail]>
Cc: tiejun.chen <[e-mail]>
Cc: Linux-MIPS <[e-mail]>
Patchwork: https://patchwork.linux-mips.org/patch/1868/
Signed-off-by: Ralf Baechle <[e-mail]>

arch/mips/include/asm/pci.h

···
 extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
 	enum pci_mmap_state mmap_state, int write_combine);
 
+#define HAVE_ARCH_PCI_RESOURCE_TO_USER
+
+static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
+		const struct resource *rsrc, resource_size_t *start,
+		resource_size_t *end)
+{
+	phys_t size = resource_size(rsrc);
+
+	*start = fixup_bigphys_addr(rsrc->start, size);
+	*end = rsrc->start + size;
+}
+
 /*
  * Dynamic DMA mapping stuff.
  * MIPS has everything mapped statically.