1
! =
980a4()P@- =
Index of /FSS-OZR/root/usr/lib/python3.9/site-packages/ansible/template
Index of /FSS-OZR/root/usr/lib/python3.9/site-packages/ansible/template
?Ͼ ?File not found.
A
Bu̾ ? A/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_DMA_MAPPING_H
#define _LINUX_DMA_MAPPING_H
#include
#include
#include
#include
#include
/**
* List of possible attributes associated with a DMA mapping. The semantics
* of each attribute should be defined in Documentation/core-api/dma-attributes.rst.
*/
/*
* DMA_ATTR_WEAK_ORDERING: Specifies that reads and writes to the mapping
* may be weakly ordered, that is that reads and writes may pass each other.
*/
#define DMA_ATTR_WEAK_ORDERING (1UL << 1)
/*
* DMA_ATTR_WRITE_COMBINE: Specifies that writes to the mapping may be
* buffered to improve performance.
*/
#define DMA_ATTR_WRITE_COMBINE (1UL << 2)
/*
* DMA_ATTR_NO_KERNEL_MAPPING: Lets the platform to avoid creating a kernel
* virtual mapping for the allocated buffer.
*/
#define DMA_ATTR_NO_KERNEL_MAPPING (1UL << 4)
/*
* DMA_ATTR_SKIP_CPU_SYNC: Allows platform code to skip synchronization of
* the CPU cache for the given buffer assuming that it has been already
* transferred to 'device' domain.
*/
#define DMA_ATTR_SKIP_CPU_SYNC (1UL << 5)
/*
* DMA_ATTR_FORCE_CONTIGUOUS: Forces contiguous allocation of the buffer
* in physical memory.
*/
#define DMA_ATTR_FORCE_CONTIGUOUS (1UL << 6)
/*
* DMA_ATTR_ALLOC_SINGLE_PAGES: This is a hint to the DMA-mapping subsystem
* that it's probably not worth the time to try to allocate memory to in a way
* that gives better TLB efficiency.
*/
#define DMA_ATTR_ALLOC_SINGLE_PAGES (1UL << 7)
/*
* DMA_ATTR_NO_WARN: This tells the DMA-mapping subsystem to suppress
* allocation failure reports (similarly to __GFP_NOWARN).
*/
#define DMA_ATTR_NO_WARN (1UL << 8)
/*
* DMA_ATTR_PRIVILEGED: used to indicate that the buffer is fully
* accessible at an elevated privilege level (and ideally inaccessible or
* at least read-only at lesser-privileged levels).
*/
#define DMA_ATTR_PRIVILEGED (1UL << 9)
/*
* A dma_addr_t can hold any valid DMA or bus address for the platform. It can
* be given to a device to use as a DMA source or target. It is specific to a
* given device and there may be a translation between the CPU physical address
* space and the bus address space.
*
* DMA_MAPPING_ERROR is the magic error code if a mapping failed. It should not
* be used directly in drivers, but checked for using dma_mapping_error()
* instead.
*/
#define DMA_MAPPING_ERROR (~(dma_addr_t)0)
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
struct dma_iova_state {
dma_addr_t addr;
u64 __size;
};
/*
* Use the high bit to mark if we used swiotlb for one or more ranges.
*/
#define DMA_IOVA_USE_SWIOTLB (1ULL << 63)
static inline size_t dma_iova_size(struct dma_iova_state *state)
{
/* Casting is needed for 32-bits systems */
return (size_t)(state->__size & ~DMA_IOVA_USE_SWIOTLB);
}
#ifdef CONFIG_DMA_API_DEBUG
void debug_dma_mapping_error(struct device *dev, dma_addr_t dma_addr);
void