Contributors: 6
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| FUJITA Tomonori |
92 |
49.73% |
3 |
37.50% |
| Christoph Hellwig |
37 |
20.00% |
1 |
12.50% |
| Anton Blanchard |
31 |
16.76% |
1 |
12.50% |
| Joerg Roedel |
16 |
8.65% |
1 |
12.50% |
| Thomas Gleixner |
8 |
4.32% |
1 |
12.50% |
| Greg Kroah-Hartman |
1 |
0.54% |
1 |
12.50% |
| Total |
185 |
|
8 |
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_IOMMU_HELPER_H
#define _LINUX_IOMMU_HELPER_H
#include <linux/bug.h>
#include <linux/kernel.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;
}
static inline int iommu_is_span_boundary(unsigned int index, unsigned int nr,
unsigned long shift, unsigned long boundary_size)
{
BUG_ON(!is_power_of_2(boundary_size));
shift = (shift + index) & (boundary_size - 1);
return shift + nr > boundary_size;
}
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);
static inline unsigned long iommu_num_pages(unsigned long addr,
unsigned long len,
unsigned long io_page_size)
{
unsigned long size = (addr & (io_page_size - 1)) + len;
return DIV_ROUND_UP(size, io_page_size);
}
#endif