--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _RTE_MEMZONE_H_
+#define _RTE_MEMZONE_H_
+
+/**
+ * @file
+ * RTE Memzone
+ *
+ * The goal of the memzone allocator is to reserve contiguous
+ * portions of physical memory. These zones are identified by a name.
+ *
+ * The memzone descriptors are shared by all partitions and are
+ * located in a known place of physical memory. This zone is accessed
+ * using rte_eal_get_configuration(). The lookup (by name) of a
+ * memory zone can be done in any partition and returns the same
+ * physical address.
+ *
+ * A reserved memory zone cannot be unreserved. The reservation shall
+ * be done at initialization time only.
+ */
+
+#include <stdio.h>
+#include <rte_memory.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define RTE_MEMZONE_2MB 0x00000001 /**< Use 2MB pages. */
+#define RTE_MEMZONE_1GB 0x00000002 /**< Use 1GB pages. */
+#define RTE_MEMZONE_16MB 0x00000100 /**< Use 16MB pages. */
+#define RTE_MEMZONE_16GB 0x00000200 /**< Use 16GB pages. */
+#define RTE_MEMZONE_256KB 0x00010000 /**< Use 256KB pages. */
+#define RTE_MEMZONE_256MB 0x00020000 /**< Use 256MB pages. */
+#define RTE_MEMZONE_512MB 0x00040000 /**< Use 512MB pages. */
+#define RTE_MEMZONE_4GB 0x00080000 /**< Use 4GB pages. */
+#define RTE_MEMZONE_SIZE_HINT_ONLY 0x00000004 /**< Use available page size */
+
+/**
+ * A structure describing a memzone, which is a contiguous portion of
+ * physical memory identified by a name.
+ */
+struct rte_memzone {
+
+#define RTE_MEMZONE_NAMESIZE 32 /**< Maximum length of memory zone name.*/
+ char name[RTE_MEMZONE_NAMESIZE]; /**< Name of the memory zone. */
+
+ phys_addr_t phys_addr; /**< Start physical address. */
+ union {
+ void *addr; /**< Start virtual address. */
+ uint64_t addr_64; /**< Makes sure addr is always 64-bits */
+ };
+#ifdef RTE_LIBRTE_IVSHMEM
+ phys_addr_t ioremap_addr; /**< Real physical address inside the VM */
+#endif
+ size_t len; /**< Length of the memzone. */
+
+ uint64_t hugepage_sz; /**< The page size of underlying memory */
+
+ int32_t socket_id; /**< NUMA socket ID. */
+
+ uint32_t flags; /**< Characteristics of this memzone. */
+ uint32_t memseg_id; /**< Memseg it belongs. */
+} __attribute__((__packed__));
+
+/**
+ * Reserve a portion of physical memory.
+ *
+ * This function reserves some memory and returns a pointer to a
+ * correctly filled memzone descriptor. If the allocation cannot be
+ * done, return NULL.
+ *
+ * @param name
+ * The name of the memzone. If it already exists, the function will
+ * fail and return NULL.
+ * @param len
+ * The size of the memory to be reserved. If it
+ * is 0, the biggest contiguous zone will be reserved.
+ * @param socket_id
+ * The socket identifier in the case of
+ * NUMA. The value can be SOCKET_ID_ANY if there is no NUMA
+ * constraint for the reserved zone.
+ * @param flags
+ * The flags parameter is used to request memzones to be
+ * taken from specifically sized hugepages.
+ * - RTE_MEMZONE_2MB - Reserved from 2MB pages
+ * - RTE_MEMZONE_1GB - Reserved from 1GB pages
+ * - RTE_MEMZONE_16MB - Reserved from 16MB pages
+ * - RTE_MEMZONE_16GB - Reserved from 16GB pages
+ * - RTE_MEMZONE_256KB - Reserved from 256KB pages
+ * - RTE_MEMZONE_256MB - Reserved from 256MB pages
+ * - RTE_MEMZONE_512MB - Reserved from 512MB pages
+ * - RTE_MEMZONE_4GB - Reserved from 4GB pages
+ * - RTE_MEMZONE_SIZE_HINT_ONLY - Allow alternative page size to be used if
+ * the requested page size is unavailable.
+ * If this flag is not set, the function
+ * will return error on an unavailable size
+ * request.
+ * @return
+ * A pointer to a correctly-filled read-only memzone descriptor, or NULL
+ * on error.
+ * On error case, rte_errno will be set appropriately:
+ * - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
+ * - E_RTE_SECONDARY - function was called from a secondary process instance
+ * - ENOSPC - the maximum number of memzones has already been allocated
+ * - EEXIST - a memzone with the same name already exists
+ * - ENOMEM - no appropriate memory area found in which to create memzone
+ * - EINVAL - invalid parameters
+ */
+const struct rte_memzone *rte_memzone_reserve(const char *name,
+ size_t len, int socket_id,
+ unsigned flags);
+
+/**
+ * Reserve a portion of physical memory with alignment on a specified
+ * boundary.
+ *
+ * This function reserves some memory with alignment on a specified
+ * boundary, and returns a pointer to a correctly filled memzone
+ * descriptor. If the allocation cannot be done or if the alignment
+ * is not a power of 2, returns NULL.
+ *
+ * @param name
+ * The name of the memzone. If it already exists, the function will
+ * fail and return NULL.
+ * @param len
+ * The size of the memory to be reserved. If it
+ * is 0, the biggest contiguous zone will be reserved.
+ * @param socket_id
+ * The socket identifier in the case of
+ * NUMA. The value can be SOCKET_ID_ANY if there is no NUMA
+ * constraint for the reserved zone.
+ * @param flags
+ * The flags parameter is used to request memzones to be
+ * taken from specifically sized hugepages.
+ * - RTE_MEMZONE_2MB - Reserved from 2MB pages
+ * - RTE_MEMZONE_1GB - Reserved from 1GB pages
+ * - RTE_MEMZONE_16MB - Reserved from 16MB pages
+ * - RTE_MEMZONE_16GB - Reserved from 16GB pages
+ * - RTE_MEMZONE_256KB - Reserved from 256KB pages
+ * - RTE_MEMZONE_256MB - Reserved from 256MB pages
+ * - RTE_MEMZONE_512MB - Reserved from 512MB pages
+ * - RTE_MEMZONE_4GB - Reserved from 4GB pages
+ * - RTE_MEMZONE_SIZE_HINT_ONLY - Allow alternative page size to be used if
+ * the requested page size is unavailable.
+ * If this flag is not set, the function
+ * will return error on an unavailable size
+ * request.
+ * @param align
+ * Alignment for resulting memzone. Must be a power of 2.
+ * @return
+ * A pointer to a correctly-filled read-only memzone descriptor, or NULL
+ * on error.
+ * On error case, rte_errno will be set appropriately:
+ * - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
+ * - E_RTE_SECONDARY - function was called from a secondary process instance
+ * - ENOSPC - the maximum number of memzones has already been allocated
+ * - EEXIST - a memzone with the same name already exists
+ * - ENOMEM - no appropriate memory area found in which to create memzone
+ * - EINVAL - invalid parameters
+ */
+const struct rte_memzone *rte_memzone_reserve_aligned(const char *name,
+ size_t len, int socket_id,
+ unsigned flags, unsigned align);
+
+/**
+ * Reserve a portion of physical memory with specified alignment and
+ * boundary.
+ *
+ * This function reserves some memory with specified alignment and
+ * boundary, and returns a pointer to a correctly filled memzone
+ * descriptor. If the allocation cannot be done or if the alignment
+ * or boundary are not a power of 2, returns NULL.
+ * Memory buffer is reserved in a way, that it wouldn't cross specified
+ * boundary. That implies that requested length should be less or equal
+ * then boundary.
+ *
+ * @param name
+ * The name of the memzone. If it already exists, the function will
+ * fail and return NULL.
+ * @param len
+ * The size of the memory to be reserved. If it
+ * is 0, the biggest contiguous zone will be reserved.
+ * @param socket_id
+ * The socket identifier in the case of
+ * NUMA. The value can be SOCKET_ID_ANY if there is no NUMA
+ * constraint for the reserved zone.
+ * @param flags
+ * The flags parameter is used to request memzones to be
+ * taken from specifically sized hugepages.
+ * - RTE_MEMZONE_2MB - Reserved from 2MB pages
+ * - RTE_MEMZONE_1GB - Reserved from 1GB pages
+ * - RTE_MEMZONE_16MB - Reserved from 16MB pages
+ * - RTE_MEMZONE_16GB - Reserved from 16GB pages
+ * - RTE_MEMZONE_256KB - Reserved from 256KB pages
+ * - RTE_MEMZONE_256MB - Reserved from 256MB pages
+ * - RTE_MEMZONE_512MB - Reserved from 512MB pages
+ * - RTE_MEMZONE_4GB - Reserved from 4GB pages
+ * - RTE_MEMZONE_SIZE_HINT_ONLY - Allow alternative page size to be used if
+ * the requested page size is unavailable.
+ * If this flag is not set, the function
+ * will return error on an unavailable size
+ * request.
+ * @param align
+ * Alignment for resulting memzone. Must be a power of 2.
+ * @param bound
+ * Boundary for resulting memzone. Must be a power of 2 or zero.
+ * Zero value implies no boundary condition.
+ * @return
+ * A pointer to a correctly-filled read-only memzone descriptor, or NULL
+ * on error.
+ * On error case, rte_errno will be set appropriately:
+ * - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
+ * - E_RTE_SECONDARY - function was called from a secondary process instance
+ * - ENOSPC - the maximum number of memzones has already been allocated
+ * - EEXIST - a memzone with the same name already exists
+ * - ENOMEM - no appropriate memory area found in which to create memzone
+ * - EINVAL - invalid parameters
+ */
+const struct rte_memzone *rte_memzone_reserve_bounded(const char *name,
+ size_t len, int socket_id,
+ unsigned flags, unsigned align, unsigned bound);
+
+/**
+ * Free a memzone.
+ *
+ * Note: an IVSHMEM zone cannot be freed.
+ *
+ * @param mz
+ * A pointer to the memzone
+ * @return
+ * -EINVAL - invalid parameter, IVSHMEM memzone.
+ * 0 - success
+ */
+int rte_memzone_free(const struct rte_memzone *mz);
+
+/**
+ * Lookup for a memzone.
+ *
+ * Get a pointer to a descriptor of an already reserved memory
+ * zone identified by the name given as an argument.
+ *
+ * @param name
+ * The name of the memzone.
+ * @return
+ * A pointer to a read-only memzone descriptor.
+ */
+const struct rte_memzone *rte_memzone_lookup(const char *name);
+
+/**
+ * Dump all reserved memzones to the console.
+ *
+ * @param f
+ * A pointer to a file for output
+ */
+void rte_memzone_dump(FILE *f);
+
+/**
+ * Walk list of all memzones
+ *
+ * @param func
+ * Iterator function
+ * @param arg
+ * Argument passed to iterator
+ */
+void rte_memzone_walk(void (*func)(const struct rte_memzone *, void *arg),
+ void *arg);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTE_MEMZONE_H_ */
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