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mem: introduce IOVA type

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The IO virtual addresses may be used instead of physical addresses.
As IOVA is more generic, it should be used in most places instead
of physical address wording.

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
Acked-by: Santosh Shukla <santosh.shukla@caviumnetworks.com>
This commit is contained in:
Thomas Monjalon 2017-11-04 00:36:47 +01:00
parent 0587fb9111
commit d03896dc2d
1 changed files with 10 additions and 1 deletions
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11
lib/librte_eal/common/include/rte_memory.h
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@ -92,8 +92,17 @@ enum rte_page_sizes {
*/
#define __rte_cache_min_aligned __rte_aligned(RTE_CACHE_LINE_MIN_SIZE)
typedef uint64_t phys_addr_t; /**< Physical address definition. */
typedef uint64_t phys_addr_t; /**< Physical address. */
#define RTE_BAD_PHYS_ADDR ((phys_addr_t)-1)
/**
* IO virtual address type.
* When the physical addressing mode (IOVA as PA) is in use,
* the translation from an IO virtual address (IOVA) to a physical address
* is a direct mapping, i.e. the same value.
* Otherwise, in virtual mode (IOVA as VA), an IOMMU may do the translation.
*/
typedef uint64_t rte_iova_t;
#define RTE_BAD_IOVA ((rte_iova_t)-1)
/**
* Physical memory segment descriptor.