mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
synced 2025-01-10 07:50:04 +00:00
7eba1d5148
The generic IOMMU device-tree bindings can be used to add arbitrary OF masters to an IOMMU with a compliant binding. This patch introduces of_iommu_configure, which does exactly that. Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Joerg Roedel <jroedel@suse.de> Acked-by: Marek Szyprowski <m.szyprowski@samsung.com> Tested-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
#ifndef __OF_IOMMU_H
|
|
#define __OF_IOMMU_H
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/iommu.h>
|
|
#include <linux/of.h>
|
|
|
|
#ifdef CONFIG_OF_IOMMU
|
|
|
|
extern int of_get_dma_window(struct device_node *dn, const char *prefix,
|
|
int index, unsigned long *busno, dma_addr_t *addr,
|
|
size_t *size);
|
|
|
|
extern void of_iommu_init(void);
|
|
extern struct iommu_ops *of_iommu_configure(struct device *dev);
|
|
|
|
#else
|
|
|
|
static inline int of_get_dma_window(struct device_node *dn, const char *prefix,
|
|
int index, unsigned long *busno, dma_addr_t *addr,
|
|
size_t *size)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline void of_iommu_init(void) { }
|
|
static inline struct iommu_ops *of_iommu_configure(struct device *dev)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
#endif /* CONFIG_OF_IOMMU */
|
|
|
|
static inline void of_iommu_set_ops(struct device_node *np,
|
|
const struct iommu_ops *ops)
|
|
{
|
|
np->data = (struct iommu_ops *)ops;
|
|
}
|
|
|
|
static inline struct iommu_ops *of_iommu_get_ops(struct device_node *np)
|
|
{
|
|
return np->data;
|
|
}
|
|
|
|
extern struct of_device_id __iommu_of_table;
|
|
|
|
typedef int (*of_iommu_init_fn)(struct device_node *);
|
|
|
|
#define IOMMU_OF_DECLARE(name, compat, fn) \
|
|
_OF_DECLARE(iommu, name, compat, fn, of_iommu_init_fn)
|
|
|
|
#endif /* __OF_IOMMU_H */
|