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/* Copyright (c) 2015, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
/**
* @file
*
* ODP packet descriptor
*/
#ifndef ODP_PLAT_PACKET_H_
#define ODP_PLAT_PACKET_H_
#ifdef __cplusplus
extern "C" {
#endif
#include <odp/std_types.h>
#include <odp/plat/event_types.h>
#include <odp/plat/packet_io_types.h>
#include <odp/plat/packet_types.h>
#include <odp/plat/buffer_types.h>
#include <odp/plat/pool_types.h>
/** @ingroup odp_packet
* @{
*/
extern const unsigned int pkt_len_offset;
extern const unsigned int udata_len_offset;
extern const unsigned int udata_offset;
/**
* Packet data length
*
* Returns sum of data lengths over all packet segments.
*
* @param pkt Packet handle
*
* @return Packet data length
*
* NOTE: This function is inlined because it's on a performance hot path. As we
* can't force the application to directly include DPDK headers we have to
* export this field through pkt_len_offset. It is calculated compile time in
* odp_packet.c, where we can see the DPDK definitions.
*/
static inline uint32_t odp_packet_len(odp_packet_t pkt)
{
return *(uint32_t *)((char *)pkt + pkt_len_offset);
}
/**
* User area address
*
* Each packet has an area for user data. Size of the area is fixed and defined
* in packet pool parameters.
*
* @param pkt Packet handle
*
* @return User area address associated with the packet
* @retval NULL The packet does not have user area
*/
static inline void *odp_packet_user_area(odp_packet_t pkt)
{
return (void *)((char *)pkt + udata_offset);
}
/**
* User area size
*
* The size is fixed and defined in packet pool parameters.
*
* @param pkt Packet handle
*
* @return User area size in bytes
*/
static inline uint32_t odp_packet_user_area_size(odp_packet_t pkt)
{
return *(uint32_t *)((char *)pkt + udata_len_offset);
}
/**
* @}
*/
#include <odp/api/packet.h>
#ifdef __cplusplus
}
#endif
#endif /* ODP_PLAT_PACKET_H_ */
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