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| author | Stephen Hemminger <stephen@networkplumber.org> | 2018-09-14 09:10:18 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-25 20:33:24 +0200 |
| commit | bfddabfa230452cea32aae82f9cd85ab22601acf (patch) | |
| tree | 704cf589d9d5d29ffd837ec15217bba17a785ee2 /drivers/uio/uio.c | |
| parent | ae6935ed7d424ffa74d634da00767e7b03c98fd3 (diff) | |
| download | linux-stable-bfddabfa230452cea32aae82f9cd85ab22601acf.tar.gz linux-stable-bfddabfa230452cea32aae82f9cd85ab22601acf.tar.bz2 linux-stable-bfddabfa230452cea32aae82f9cd85ab22601acf.zip | |
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: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/uio/uio.c')
| -rw-r--r-- | drivers/uio/uio.c | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c index 0ffb324aa038..e601bd3fbae1 100644 --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -738,7 +738,8 @@ static int uio_mmap_physical(struct vm_area_struct *vma) return -EINVAL; vma->vm_ops = &uio_physical_vm_ops; - vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + if (idev->info->mem[mi].memtype == UIO_MEM_PHYS) + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); /* * We cannot use the vm_iomap_memory() helper here, @@ -795,18 +796,19 @@ static int uio_mmap(struct file *filep, struct vm_area_struct *vma) } switch (idev->info->mem[mi].memtype) { - case UIO_MEM_PHYS: - ret = uio_mmap_physical(vma); - break; - case UIO_MEM_LOGICAL: - case UIO_MEM_VIRTUAL: - ret = uio_mmap_logical(vma); - break; - default: - ret = -EINVAL; + case UIO_MEM_IOVA: + case UIO_MEM_PHYS: + ret = uio_mmap_physical(vma); + break; + case UIO_MEM_LOGICAL: + case UIO_MEM_VIRTUAL: + ret = uio_mmap_logical(vma); + break; + default: + ret = -EINVAL; } -out: + out: mutex_unlock(&idev->info_lock); return ret; } |