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Commit bfddabfa authored by Stephen Hemminger's avatar Stephen Hemminger Committed by Greg Kroah-Hartman
Browse files

uio: introduce UIO_MEM_IOVA 



Introduce the concept of mapping physical memory locations that
are normal memory. The new type UIO_MEM_IOVA are similar to
existing UIO_MEM_PHYS but the backing memory is not marked as uncached.

Also, indent related switch to the currently used style.

Signed-off-by: default avatarStephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ae6935ed

drivers/uio/uio.c

+13 −11
Original line number Diff line number Diff line
@@ -738,6 +738,7 @@ static int uio_mmap_physical(struct vm_area_struct *vma) 
		return -EINVAL;



	vma->vm_ops = &uio_physical_vm_ops;

	if (idev->info->mem[mi].memtype == UIO_MEM_PHYS)

		vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);



	/*
@@ -795,6 +796,7 @@ static int uio_mmap(struct file *filep, struct vm_area_struct *vma) 
	}



	switch (idev->info->mem[mi].memtype) {

	case UIO_MEM_IOVA:

	case UIO_MEM_PHYS:

		ret = uio_mmap_physical(vma);

		break;

include/linux/uio_driver.h

+1 −0
Original line number Diff line number Diff line
@@ -133,6 +133,7 @@ extern void uio_event_notify(struct uio_info *info); 
#define UIO_MEM_PHYS	1

#define UIO_MEM_LOGICAL	2

#define UIO_MEM_VIRTUAL 3

#define UIO_MEM_IOVA	4



/* defines for uio_port->porttype */

#define UIO_PORT_NONE	0