mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 19:53:59 +08:00
56d9366074
This patch introduces the generic iommu_num_pages function. It can be used by a given memory area. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Muli Ben-Yehuda <muli@il.ibm.com> Cc: Dave Airlie <airlied@linux.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
30 lines
937 B
C
30 lines
937 B
C
#ifndef _LINUX_IOMMU_HELPER_H
|
|
#define _LINUX_IOMMU_HELPER_H
|
|
|
|
static inline unsigned long iommu_device_max_index(unsigned long size,
|
|
unsigned long offset,
|
|
u64 dma_mask)
|
|
{
|
|
if (size + offset > dma_mask)
|
|
return dma_mask - offset + 1;
|
|
else
|
|
return size;
|
|
}
|
|
|
|
extern int iommu_is_span_boundary(unsigned int index, unsigned int nr,
|
|
unsigned long shift,
|
|
unsigned long boundary_size);
|
|
extern void iommu_area_reserve(unsigned long *map, unsigned long i, int len);
|
|
extern unsigned long iommu_area_alloc(unsigned long *map, unsigned long size,
|
|
unsigned long start, unsigned int nr,
|
|
unsigned long shift,
|
|
unsigned long boundary_size,
|
|
unsigned long align_mask);
|
|
extern void iommu_area_free(unsigned long *map, unsigned long start,
|
|
unsigned int nr);
|
|
|
|
extern unsigned long iommu_num_pages(unsigned long addr, unsigned long len,
|
|
unsigned long io_page_size);
|
|
|
|
#endif
|