141 lines
4.5 KiB
C
141 lines
4.5 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2013 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef _RTE_MEMORY_H_
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#define _RTE_MEMORY_H_
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/**
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* @file
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*
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* Memory-related RTE API.
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*/
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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enum rte_page_sizes {
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RTE_PGSIZE_4K = 1 << 12,
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RTE_PGSIZE_2M = RTE_PGSIZE_4K << 9,
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RTE_PGSIZE_1G = RTE_PGSIZE_2M <<9
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};
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#define SOCKET_ID_ANY -1 /**< Any NUMA socket. */
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#define CACHE_LINE_SIZE 64 /**< Cache line size. */
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#define CACHE_LINE_MASK (CACHE_LINE_SIZE-1) /**< Cache line mask. */
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#define CACHE_LINE_ROUNDUP(size) \
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(CACHE_LINE_SIZE * ((size + CACHE_LINE_SIZE - 1) / CACHE_LINE_SIZE))
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/**< Return the first cache-aligned value greater or equal to size. */
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/**
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* Force alignment to cache line.
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*/
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#define __rte_cache_aligned __attribute__((__aligned__(CACHE_LINE_SIZE)))
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typedef uint64_t phys_addr_t; /**< Physical address definition. */
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/**
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* Physical memory segment descriptor.
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*/
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struct rte_memseg {
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phys_addr_t phys_addr; /**< Start physical address. */
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union {
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void *addr; /**< Start virtual address. */
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uint64_t addr_64; /**< Makes sure addr is always 64 bits */
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};
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uint64_t len; /**< Length of the segment. */
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uint64_t hugepage_sz; /**< The pagesize of underlying memory */
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int32_t socket_id; /**< NUMA socket ID. */
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uint32_t nchannel; /**< Number of channels. */
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uint32_t nrank; /**< Number of ranks. */
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} __attribute__((__packed__));
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/**
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* Get the layout of the available physical memory.
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*
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* It can be useful for an application to have the full physical
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* memory layout to decide the size of a memory zone to reserve. This
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* table is stored in rte_config (see rte_eal_get_configuration()).
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*
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* @return
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* - On success, return a pointer to a read-only table of struct
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* rte_physmem_desc elements, containing the layout of all
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* addressable physical memory. The last element of the table
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* contains a NULL address.
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* - On error, return NULL. This should not happen since it is a fatal
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* error that will probably cause the entire system to panic.
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*/
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const struct rte_memseg *rte_eal_get_physmem_layout(void);
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/**
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* Dump the physical memory layout to the console.
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*/
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void rte_dump_physmem_layout(void);
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/**
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* Get the total amount of available physical memory.
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*
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* @return
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* The total amount of available physical memory in bytes.
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*/
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uint64_t rte_eal_get_physmem_size(void);
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/**
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* Get the number of memory channels.
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*
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* @return
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* The number of memory channels on the system. The value is 0 if unknown
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* or not the same on all devices.
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*/
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unsigned rte_memory_get_nchannel(void);
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/**
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* Get the number of memory ranks.
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*
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* @return
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* The number of memory ranks on the system. The value is 0 if unknown or
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* not the same on all devices.
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*/
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unsigned rte_memory_get_nrank(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _RTE_MEMORY_H_ */
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