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/* Copyright (c) 2013, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
/**
* @file
*
* ODP configuration
*/
#ifndef ODP_CONFIG_H_
#define ODP_CONFIG_H_
#ifdef __cplusplus
extern "C" {
#endif
/** @addtogroup odp_compiler_optim
* Macro for maximum number of resources in ODP.
* @{
*/
/**
* Maximum number of threads
*/
#define ODP_CONFIG_MAX_THREADS 128
/**
* Maximum number of buffer pools
*/
#define ODP_CONFIG_BUFFER_POOLS 16
/**
* Maximum number of queues
*/
#define ODP_CONFIG_QUEUES 1024
/**
* Number of scheduling priorities
*/
#define ODP_CONFIG_SCHED_PRIOS 8
/**
* Maximum number of packet IO resources
*/
#define ODP_CONFIG_PKTIO_ENTRIES 64
/**
* Minimum supported buffer alignment
* This defines the minimum buffer alignment request. Requests for
* values below this will be rounded up to this value.
*/
#define ODP_CONFIG_BUFFER_ALIGN_MIN 8
/**
* Maximum supported buffer alignment
* This defines the maximum supported buffer alignment. Requests for
* values above this will fail.
*/
#define ODP_CONFIG_BUFFER_ALIGN_MAX (4*1024)
/**
* Default packet headroom
* This is default headroom that will be applied to any buffer pool created
* for packets. Note that while headroom serves to reserve space for packet
* header expansion via the odp_packet_push_head() routine, it also serves to
* align packets within the buffer. ODP packet buffers always have a minimum
* of 8 byte alignment, so the headroom can be used to offset packets so that,
* for example, a 14 byte standard Ethernet header ends on a 4 byte boundary
* so that the following IP header begins on a 4 byte alignment. Note also
* that this is the minimum headroom value that the application
* requires. Implementations are free to add to whatever value is specified
* here in multiples of 8 bytes to preserve the implied alignment
* specification. The specific default shown here allows a 1500-byte packet
* to be received into a single segment with Ethernet offset alignment and
* room for some header expansion.
*/
#define ODP_CONFIG_PACKET_HEADROOM 66
/**
* Default packet tailroom
* This is the default tailroom that will be applied to any buffer pool
* created for packets. This specifies the minimum tailroom value that the
* application requires. Implementations are free to add to this as desired
* without restriction. Note that most implementations will automatically
* consider any unused portion of the last segment of a packet as tailroom
*/
#define ODP_CONFIG_PACKET_TAILROOM 0
/**
* Minimum packet segment size
* This defines the minimum allowable size for packet segments. It exists to
* ensure that the application can have a reasonable expectation that all
* packet headers will reside in the first packet segment. Note that this
* value MUST be a multiple of 8.
*
* This is the granularity of segmented buffers/packets. Note that this is
* currently only applicable to buffers of type ODP_BUFFER_TYPE_PACKET. It is
* sized for now to be large enough to support 1536-byte packets with the
* default headroom shown above, since the raw socket interface does not
* at present support scatter/gather I/O. This is subject to the
* ODP_CONFIG_PACKET_BUF_MIN_LEN configuration shown above and MUST be a
* multiple of ODP_CACHE_LINE_SIZE. 1664 is used here as a default since it is
* a multiple of both 64 and 128, which are the most common cache line sizes.
* Adjust as needed for your platform.
*/
#define ODP_CONFIG_PACKET_BUF_LEN_MIN (1664)
/**
* Maximum packet length supported
* MUST be an integral number of segments and SHOULD be large enough to
* accommodate jumbo packets (9K). Attempts to allocate or extend packets to
* sizes larger than this limit will fail.
*/
#define ODP_CONFIG_PACKET_BUF_LEN_MAX (ODP_CONFIG_PACKET_BUF_LEN_MIN*6)
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif
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