*/
#include <stdio.h>
+#include <rte_compat.h>
#include <rte_memory.h>
#include <rte_common.h>
#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 */
+#define RTE_MEMZONE_IOVA_CONTIG 0x00100000 /**< Ask for IOVA-contiguous memzone. */
/**
* A structure describing a memzone, which is a contiguous portion of
int32_t socket_id; /**< NUMA socket ID. */
uint32_t flags; /**< Characteristics of this memzone. */
- uint32_t memseg_id; /**< Memseg it belongs. */
} __attribute__((__packed__));
/**
* correctly filled memzone descriptor. If the allocation cannot be
* done, return NULL.
*
+ * @note Reserving memzones with len set to 0 will only attempt to allocate
+ * memzones from memory that is already available. It will not trigger any
+ * new allocations.
+ *
+ * @note: When reserving memzones with len set to 0, it is preferable to also
+ * set a valid socket_id. Setting socket_id to SOCKET_ID_ANY is supported, but
+ * will likely not yield expected results. Specifically, the resulting memzone
+ * may not necessarily be the biggest memzone available, but rather biggest
+ * memzone available on socket id corresponding to an lcore from which
+ * reservation was called.
+ *
* @param name
* The name of the memzone. If it already exists, the function will
* fail and return NULL.
* If this flag is not set, the function
* will return error on an unavailable size
* request.
+ * - RTE_MEMZONE_IOVA_CONTIG - Ensure reserved memzone is IOVA-contiguous.
+ * This option should be used when allocating
+ * memory intended for hardware rings etc.
* @return
* A pointer to a correctly-filled read-only memzone descriptor, or NULL
* on error.
* descriptor. If the allocation cannot be done or if the alignment
* is not a power of 2, returns NULL.
*
+ * @note Reserving memzones with len set to 0 will only attempt to allocate
+ * memzones from memory that is already available. It will not trigger any
+ * new allocations.
+ *
+ * @note: When reserving memzones with len set to 0, it is preferable to also
+ * set a valid socket_id. Setting socket_id to SOCKET_ID_ANY is supported, but
+ * will likely not yield expected results. Specifically, the resulting memzone
+ * may not necessarily be the biggest memzone available, but rather biggest
+ * memzone available on socket id corresponding to an lcore from which
+ * reservation was called.
+ *
* @param name
* The name of the memzone. If it already exists, the function will
* fail and return NULL.
* If this flag is not set, the function
* will return error on an unavailable size
* request.
+ * - RTE_MEMZONE_IOVA_CONTIG - Ensure reserved memzone is IOVA-contiguous.
+ * This option should be used when allocating
+ * memory intended for hardware rings etc.
* @param align
* Alignment for resulting memzone. Must be a power of 2.
* @return
* boundary. That implies that requested length should be less or equal
* then boundary.
*
+ * @note Reserving memzones with len set to 0 will only attempt to allocate
+ * memzones from memory that is already available. It will not trigger any
+ * new allocations.
+ *
+ * @note: When reserving memzones with len set to 0, it is preferable to also
+ * set a valid socket_id. Setting socket_id to SOCKET_ID_ANY is supported, but
+ * will likely not yield expected results. Specifically, the resulting memzone
+ * may not necessarily be the biggest memzone available, but rather biggest
+ * memzone available on socket id corresponding to an lcore from which
+ * reservation was called.
+ *
* @param name
* The name of the memzone. If it already exists, the function will
* fail and return NULL.
* If this flag is not set, the function
* will return error on an unavailable size
* request.
+ * - RTE_MEMZONE_IOVA_CONTIG - Ensure reserved memzone is IOVA-contiguous.
+ * This option should be used when allocating
+ * memory intended for hardware rings etc.
* @param align
* Alignment for resulting memzone. Must be a power of 2.
* @param bound