+ return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem);
+}
+
+/**
+ * pci_mmap_legacy_io - map legacy PCI IO into user memory space
+ * @kobj: kobject corresponding to device to be mapped
+ * @attr: struct bin_attribute for this file
+ * @vma: struct vm_area_struct passed to mmap
+ *
+ * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap
+ * legacy IO space (first meg of bus space) into application virtual
+ * memory space. Returns -ENOSYS if the operation isn't supported
+ */
+static int
+pci_mmap_legacy_io(struct kobject *kobj, struct bin_attribute *attr,
+ struct vm_area_struct *vma)
+{
+ struct pci_bus *bus = to_pci_bus(container_of(kobj,
+ struct device,
+ kobj));
+
+ return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io);
+}
+
+/**
+ * pci_adjust_legacy_attr - adjustment of legacy file attributes
+ * @b: bus to create files under
+ * @mmap_type: I/O port or memory
+ *
+ * Stub implementation. Can be overridden by arch if necessary.
+ */
+void __weak
+pci_adjust_legacy_attr(struct pci_bus *b, enum pci_mmap_state mmap_type)
+{
+ return;
+}
+
+/**
+ * pci_create_legacy_files - create legacy I/O port and memory files
+ * @b: bus to create files under
+ *
+ * Some platforms allow access to legacy I/O port and ISA memory space on
+ * a per-bus basis. This routine creates the files and ties them into
+ * their associated read, write and mmap files from pci-sysfs.c
+ *
+ * On error unwind, but don't propogate the error to the caller
+ * as it is ok to set up the PCI bus without these files.
+ */
+void pci_create_legacy_files(struct pci_bus *b)
+{
+ int error;
+
+ b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2,
+ GFP_ATOMIC);
+ if (!b->legacy_io)
+ goto kzalloc_err;
+
+ b->legacy_io->attr.name = "legacy_io";
+ b->legacy_io->size = 0xffff;
+ b->legacy_io->attr.mode = S_IRUSR | S_IWUSR;
+ b->legacy_io->read = pci_read_legacy_io;
+ b->legacy_io->write = pci_write_legacy_io;
+ b->legacy_io->mmap = pci_mmap_legacy_io;
+ pci_adjust_legacy_attr(b, pci_mmap_io);
+ error = device_create_bin_file(&b->dev, b->legacy_io);
+ if (error)
+ goto legacy_io_err;
+
+ /* Allocated above after the legacy_io struct */
+ b->legacy_mem = b->legacy_io + 1;
+ b->legacy_mem->attr.name = "legacy_mem";
+ b->legacy_mem->size = 1024*1024;
+ b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR;
+ b->legacy_mem->mmap = pci_mmap_legacy_mem;
+ pci_adjust_legacy_attr(b, pci_mmap_mem);
+ error = device_create_bin_file(&b->dev, b->legacy_mem);
+ if (error)
+ goto legacy_mem_err;
+
+ return;
+
+legacy_mem_err:
+ device_remove_bin_file(&b->dev, b->legacy_io);
+legacy_io_err:
+ kfree(b->legacy_io);
+ b->legacy_io = NULL;
+kzalloc_err:
+ printk(KERN_WARNING "pci: warning: could not create legacy I/O port "
+ "and ISA memory resources to sysfs\n");
+ return;
+}
+
+void pci_remove_legacy_files(struct pci_bus *b)
+{
+ if (b->legacy_io) {
+ device_remove_bin_file(&b->dev, b->legacy_io);
+ device_remove_bin_file(&b->dev, b->legacy_mem);
+ kfree(b->legacy_io); /* both are allocated here */
+ }