mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
f72e24a124
In this new subsystem we'll try to properly maintain all the generic
code related to dma-mapping, and will further consolidate arch code
into common helpers.
This pull request contains:
- removal of the DMA_ERROR_CODE macro, replacing it with calls
to ->mapping_error so that the dma_map_ops instances are
more self contained and can be shared across architectures (me)
- removal of the ->set_dma_mask method, which duplicates the
->dma_capable one in terms of functionality, but requires more
duplicate code.
- various updates for the coherent dma pool and related arm code
(Vladimir)
- various smaller cleanups (me)
-----BEGIN PGP SIGNATURE-----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=0Fso
-----END PGP SIGNATURE-----
Merge tag 'dma-mapping-4.13' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping infrastructure from Christoph Hellwig:
"This is the first pull request for the new dma-mapping subsystem
In this new subsystem we'll try to properly maintain all the generic
code related to dma-mapping, and will further consolidate arch code
into common helpers.
This pull request contains:
- removal of the DMA_ERROR_CODE macro, replacing it with calls to
->mapping_error so that the dma_map_ops instances are more self
contained and can be shared across architectures (me)
- removal of the ->set_dma_mask method, which duplicates the
->dma_capable one in terms of functionality, but requires more
duplicate code.
- various updates for the coherent dma pool and related arm code
(Vladimir)
- various smaller cleanups (me)"
* tag 'dma-mapping-4.13' of git://git.infradead.org/users/hch/dma-mapping: (56 commits)
ARM: dma-mapping: Remove traces of NOMMU code
ARM: NOMMU: Set ARM_DMA_MEM_BUFFERABLE for M-class cpus
ARM: NOMMU: Introduce dma operations for noMMU
drivers: dma-mapping: allow dma_common_mmap() for NOMMU
drivers: dma-coherent: Introduce default DMA pool
drivers: dma-coherent: Account dma_pfn_offset when used with device tree
dma: Take into account dma_pfn_offset
dma-mapping: replace dmam_alloc_noncoherent with dmam_alloc_attrs
dma-mapping: remove dmam_free_noncoherent
crypto: qat - avoid an uninitialized variable warning
au1100fb: remove a bogus dma_free_nonconsistent call
MAINTAINERS: add entry for dma mapping helpers
powerpc: merge __dma_set_mask into dma_set_mask
dma-mapping: remove the set_dma_mask method
powerpc/cell: use the dma_supported method for ops switching
powerpc/cell: clean up fixed mapping dma_ops initialization
tile: remove dma_supported and mapping_error methods
xen-swiotlb: remove xen_swiotlb_set_dma_mask
arm: implement ->dma_supported instead of ->set_dma_mask
mips/loongson64: implement ->dma_supported instead of ->set_dma_mask
...
90 lines
2.4 KiB
C
90 lines
2.4 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>
|
|
|
|
extern const struct dma_map_ops dummy_dma_ops;
|
|
|
|
static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
|
|
{
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
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)
|
|
{
|
|
return dev->archdata.dma_coherent;
|
|
}
|
|
|
|
static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
|
|
{
|
|
dma_addr_t dev_addr = (dma_addr_t)paddr;
|
|
|
|
return dev_addr - ((dma_addr_t)dev->dma_pfn_offset << PAGE_SHIFT);
|
|
}
|
|
|
|
static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr)
|
|
{
|
|
phys_addr_t paddr = (phys_addr_t)dev_addr;
|
|
|
|
return paddr + ((phys_addr_t)dev->dma_pfn_offset << PAGE_SHIFT);
|
|
}
|
|
|
|
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)
|
|
{
|
|
}
|
|
|
|
/* Override for dma_max_pfn() */
|
|
static inline unsigned long dma_max_pfn(struct device *dev)
|
|
{
|
|
dma_addr_t dma_max = (dma_addr_t)*dev->dma_mask;
|
|
|
|
return (ulong)dma_to_phys(dev, dma_max) >> PAGE_SHIFT;
|
|
}
|
|
#define dma_max_pfn(dev) dma_max_pfn(dev)
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* __ASM_DMA_MAPPING_H */
|