mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 09:35:25 +07:00
53c92d7933
As a set of driver-provided callbacks and static data, there is no compelling reason for struct iommu_ops to be mutable in core code, so enforce const-ness throughout. Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
91 lines
2.3 KiB
C
91 lines
2.3 KiB
C
/*
|
|
* Copyright (C) 2012 ARM Ltd.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#ifndef __ASM_DMA_MAPPING_H
|
|
#define __ASM_DMA_MAPPING_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/vmalloc.h>
|
|
|
|
#include <xen/xen.h>
|
|
#include <asm/xen/hypervisor.h>
|
|
|
|
#define DMA_ERROR_CODE (~(dma_addr_t)0)
|
|
extern struct dma_map_ops dummy_dma_ops;
|
|
|
|
static inline struct dma_map_ops *__generic_dma_ops(struct device *dev)
|
|
{
|
|
if (dev && dev->archdata.dma_ops)
|
|
return dev->archdata.dma_ops;
|
|
|
|
/*
|
|
* We expect no ISA devices, and all other DMA masters are expected to
|
|
* have someone call arch_setup_dma_ops at device creation time.
|
|
*/
|
|
return &dummy_dma_ops;
|
|
}
|
|
|
|
static inline struct dma_map_ops *get_dma_ops(struct device *dev)
|
|
{
|
|
if (xen_initial_domain())
|
|
return xen_dma_ops;
|
|
else
|
|
return __generic_dma_ops(dev);
|
|
}
|
|
|
|
void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
|
|
const struct iommu_ops *iommu, bool coherent);
|
|
#define arch_setup_dma_ops arch_setup_dma_ops
|
|
|
|
#ifdef CONFIG_IOMMU_DMA
|
|
void arch_teardown_dma_ops(struct device *dev);
|
|
#define arch_teardown_dma_ops arch_teardown_dma_ops
|
|
#endif
|
|
|
|
/* do not use this function in a driver */
|
|
static inline bool is_device_dma_coherent(struct device *dev)
|
|
{
|
|
if (!dev)
|
|
return false;
|
|
return dev->archdata.dma_coherent;
|
|
}
|
|
|
|
static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
|
|
{
|
|
return (dma_addr_t)paddr;
|
|
}
|
|
|
|
static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr)
|
|
{
|
|
return (phys_addr_t)dev_addr;
|
|
}
|
|
|
|
static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
|
|
{
|
|
if (!dev->dma_mask)
|
|
return false;
|
|
|
|
return addr + size - 1 <= *dev->dma_mask;
|
|
}
|
|
|
|
static inline void dma_mark_clean(void *addr, size_t size)
|
|
{
|
|
}
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* __ASM_DMA_MAPPING_H */
|