+/*
+ * This one is used by /dev/mem and fbdev who have no clue about the
+ * PCI device, it tries to find the PCI device first and calls the
+ * above routine
+ */
+pgprot_t pci_phys_mem_access_prot(struct file *file,
+ unsigned long offset,
+ unsigned long size,
+ pgprot_t protection)
+{
+ struct pci_dev *pdev = NULL;
+ struct resource *found = NULL;
+ unsigned long prot = pgprot_val(protection);
+ int i;
+
+ if (page_is_ram(offset >> PAGE_SHIFT))
+ return prot;
+
+ prot |= _PAGE_NO_CACHE | _PAGE_GUARDED;
+
+ for_each_pci_dev(pdev) {
+ for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
+ struct resource *rp = &pdev->resource[i];
+ int flags = rp->flags;
+
+ /* Active and same type? */
+ if ((flags & IORESOURCE_MEM) == 0)
+ continue;
+ /* In the range of this resource? */
+ if (offset < (rp->start & PAGE_MASK) ||
+ offset > rp->end)
+ continue;
+ found = rp;
+ break;
+ }
+ if (found)
+ break;
+ }
+ if (found) {
+ if (found->flags & IORESOURCE_PREFETCH)
+ prot &= ~_PAGE_GUARDED;
+ pci_dev_put(pdev);
+ }
+
+ DBG("non-PCI map for %lx, prot: %lx\n", offset, prot);
+
+ return __pgprot(prot);
+}
+
+