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Diffstat (limited to 'arch/tile/include/hv/netio_intf.h')
| -rw-r--r-- | arch/tile/include/hv/netio_intf.h | 2975 |
1 files changed, 2975 insertions, 0 deletions
diff --git a/arch/tile/include/hv/netio_intf.h b/arch/tile/include/hv/netio_intf.h new file mode 100644 index 00000000..8d20972a --- /dev/null +++ b/arch/tile/include/hv/netio_intf.h @@ -0,0 +1,2975 @@ +/* + * Copyright 2010 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +/** + * NetIO interface structures and macros. + */ + +#ifndef __NETIO_INTF_H__ +#define __NETIO_INTF_H__ + +#include <hv/netio_errors.h> + +#ifdef __KERNEL__ +#include <linux/types.h> +#else +#include <stdint.h> +#endif + +#if !defined(__HV__) && !defined(__BOGUX__) && !defined(__KERNEL__) +#include <assert.h> +#define netio_assert assert /**< Enable assertions from macros */ +#else +#define netio_assert(...) ((void)(0)) /**< Disable assertions from macros */ +#endif + +/* + * If none of these symbols are defined, we're building libnetio in an + * environment where we have pthreads, so we'll enable locking. + */ +#if !defined(__HV__) && !defined(__BOGUX__) && !defined(__KERNEL__) && \ + !defined(__NEWLIB__) +#define _NETIO_PTHREAD /**< Include a mutex in netio_queue_t below */ + +/* + * If NETIO_UNLOCKED is defined, we don't do use per-cpu locks on + * per-packet NetIO operations. We still do pthread locking on things + * like netio_input_register, though. This is used for building + * libnetio_unlocked. + */ +#ifndef NETIO_UNLOCKED + +/* Avoid PLT overhead by using our own inlined per-cpu lock. */ +#include <sched.h> +typedef int _netio_percpu_mutex_t; + +static __inline int +_netio_percpu_mutex_init(_netio_percpu_mutex_t* lock) +{ + *lock = 0; + return 0; +} + +static __inline int +_netio_percpu_mutex_lock(_netio_percpu_mutex_t* lock) +{ + while (__builtin_expect(__insn_tns(lock), 0)) + sched_yield(); + return 0; +} + +static __inline int +_netio_percpu_mutex_unlock(_netio_percpu_mutex_t* lock) +{ + *lock = 0; + return 0; +} + +#else /* NETIO_UNLOCKED */ + +/* Don't do any locking for per-packet NetIO operations. */ +typedef int _netio_percpu_mutex_t; +#define _netio_percpu_mutex_init(L) +#define _netio_percpu_mutex_lock(L) +#define _netio_percpu_mutex_unlock(L) + +#endif /* NETIO_UNLOCKED */ +#endif /* !__HV__, !__BOGUX, !__KERNEL__, !__NEWLIB__ */ + +/** How many tiles can register for a given queue. + * @ingroup setup */ +#define NETIO_MAX_TILES_PER_QUEUE 64 + + +/** Largest permissible queue identifier. + * @ingroup setup */ +#define NETIO_MAX_QUEUE_ID 255 + + +#ifndef __DOXYGEN__ + +/* Metadata packet checksum/ethertype flags. */ + +/** The L4 checksum has not been calculated. */ +#define _NETIO_PKT_NO_L4_CSUM_SHIFT 0 +#define _NETIO_PKT_NO_L4_CSUM_RMASK 1 +#define _NETIO_PKT_NO_L4_CSUM_MASK \ + (_NETIO_PKT_NO_L4_CSUM_RMASK << _NETIO_PKT_NO_L4_CSUM_SHIFT) + +/** The L3 checksum has not been calculated. */ +#define _NETIO_PKT_NO_L3_CSUM_SHIFT 1 +#define _NETIO_PKT_NO_L3_CSUM_RMASK 1 +#define _NETIO_PKT_NO_L3_CSUM_MASK \ + (_NETIO_PKT_NO_L3_CSUM_RMASK << _NETIO_PKT_NO_L3_CSUM_SHIFT) + +/** The L3 checksum is incorrect (or perhaps has not been calculated). */ +#define _NETIO_PKT_BAD_L3_CSUM_SHIFT 2 +#define _NETIO_PKT_BAD_L3_CSUM_RMASK 1 +#define _NETIO_PKT_BAD_L3_CSUM_MASK \ + (_NETIO_PKT_BAD_L3_CSUM_RMASK << _NETIO_PKT_BAD_L3_CSUM_SHIFT) + +/** The Ethernet packet type is unrecognized. */ +#define _NETIO_PKT_TYPE_UNRECOGNIZED_SHIFT 3 +#define _NETIO_PKT_TYPE_UNRECOGNIZED_RMASK 1 +#define _NETIO_PKT_TYPE_UNRECOGNIZED_MASK \ + (_NETIO_PKT_TYPE_UNRECOGNIZED_RMASK << \ + _NETIO_PKT_TYPE_UNRECOGNIZED_SHIFT) + +/* Metadata packet type flags. */ + +/** Where the packet type bits are; this field is the index into + * _netio_pkt_info. */ +#define _NETIO_PKT_TYPE_SHIFT 4 +#define _NETIO_PKT_TYPE_RMASK 0x3F + +/** How many VLAN tags the packet has, and, if we have two, which one we + * actually grouped on. A VLAN within a proprietary (Marvell or Broadcom) + * tag is counted here. */ +#define _NETIO_PKT_VLAN_SHIFT 4 +#define _NETIO_PKT_VLAN_RMASK 0x3 +#define _NETIO_PKT_VLAN_MASK \ + (_NETIO_PKT_VLAN_RMASK << _NETIO_PKT_VLAN_SHIFT) +#define _NETIO_PKT_VLAN_NONE 0 /* No VLAN tag. */ +#define _NETIO_PKT_VLAN_ONE 1 /* One VLAN tag. */ +#define _NETIO_PKT_VLAN_TWO_OUTER 2 /* Two VLAN tags, outer one used. */ +#define _NETIO_PKT_VLAN_TWO_INNER 3 /* Two VLAN tags, inner one used. */ + +/** Which proprietary tags the packet has. */ +#define _NETIO_PKT_TAG_SHIFT 6 +#define _NETIO_PKT_TAG_RMASK 0x3 +#define _NETIO_PKT_TAG_MASK \ + (_NETIO_PKT_TAG_RMASK << _NETIO_PKT_TAG_SHIFT) +#define _NETIO_PKT_TAG_NONE 0 /* No proprietary tags. */ +#define _NETIO_PKT_TAG_MRVL 1 /* Marvell HyperG.Stack tags. */ +#define _NETIO_PKT_TAG_MRVL_EXT 2 /* HyperG.Stack extended tags. */ +#define _NETIO_PKT_TAG_BRCM 3 /* Broadcom HiGig tags. */ + +/** Whether a packet has an LLC + SNAP header. */ +#define _NETIO_PKT_SNAP_SHIFT 8 +#define _NETIO_PKT_SNAP_RMASK 0x1 +#define _NETIO_PKT_SNAP_MASK \ + (_NETIO_PKT_SNAP_RMASK << _NETIO_PKT_SNAP_SHIFT) + +/* NOTE: Bits 9 and 10 are unused. */ + +/** Length of any custom data before the L2 header, in words. */ +#define _NETIO_PKT_CUSTOM_LEN_SHIFT 11 +#define _NETIO_PKT_CUSTOM_LEN_RMASK 0x1F +#define _NETIO_PKT_CUSTOM_LEN_MASK \ + (_NETIO_PKT_CUSTOM_LEN_RMASK << _NETIO_PKT_CUSTOM_LEN_SHIFT) + +/** The L4 checksum is incorrect (or perhaps has not been calculated). */ +#define _NETIO_PKT_BAD_L4_CSUM_SHIFT 16 +#define _NETIO_PKT_BAD_L4_CSUM_RMASK 0x1 +#define _NETIO_PKT_BAD_L4_CSUM_MASK \ + (_NETIO_PKT_BAD_L4_CSUM_RMASK << _NETIO_PKT_BAD_L4_CSUM_SHIFT) + +/** Length of the L2 header, in words. */ +#define _NETIO_PKT_L2_LEN_SHIFT 17 +#define _NETIO_PKT_L2_LEN_RMASK 0x1F +#define _NETIO_PKT_L2_LEN_MASK \ + (_NETIO_PKT_L2_LEN_RMASK << _NETIO_PKT_L2_LEN_SHIFT) + + +/* Flags in minimal packet metadata. */ + +/** We need an eDMA checksum on this packet. */ +#define _NETIO_PKT_NEED_EDMA_CSUM_SHIFT 0 +#define _NETIO_PKT_NEED_EDMA_CSUM_RMASK 1 +#define _NETIO_PKT_NEED_EDMA_CSUM_MASK \ + (_NETIO_PKT_NEED_EDMA_CSUM_RMASK << _NETIO_PKT_NEED_EDMA_CSUM_SHIFT) + +/* Data within the packet information table. */ + +/* Note that, for efficiency, code which uses these fields assumes that none + * of the shift values below are zero. See uses below for an explanation. */ + +/** Offset within the L2 header of the innermost ethertype (in halfwords). */ +#define _NETIO_PKT_INFO_ETYPE_SHIFT 6 +#define _NETIO_PKT_INFO_ETYPE_RMASK 0x1F + +/** Offset within the L2 header of the VLAN tag (in halfwords). */ +#define _NETIO_PKT_INFO_VLAN_SHIFT 11 +#define _NETIO_PKT_INFO_VLAN_RMASK 0x1F + +#endif + + +/** The size of a memory buffer representing a small packet. + * @ingroup egress */ +#define SMALL_PACKET_SIZE 256 + +/** The size of a memory buffer representing a large packet. + * @ingroup egress */ +#define LARGE_PACKET_SIZE 2048 + +/** The size of a memory buffer representing a jumbo packet. + * @ingroup egress */ +#define JUMBO_PACKET_SIZE (12 * 1024) + + +/* Common ethertypes. + * @ingroup ingress */ +/** @{ */ +/** The ethertype of IPv4. */ +#define ETHERTYPE_IPv4 (0x0800) +/** The ethertype of ARP. */ +#define ETHERTYPE_ARP (0x0806) +/** The ethertype of VLANs. */ +#define ETHERTYPE_VLAN (0x8100) +/** The ethertype of a Q-in-Q header. */ +#define ETHERTYPE_Q_IN_Q (0x9100) +/** The ethertype of IPv6. */ +#define ETHERTYPE_IPv6 (0x86DD) +/** The ethertype of MPLS. */ +#define ETHERTYPE_MPLS (0x8847) +/** @} */ + + +/** The possible return values of NETIO_PKT_STATUS. + * @ingroup ingress + */ +typedef enum +{ + /** No problems were detected with this packet. */ + NETIO_PKT_STATUS_OK, + /** The packet is undersized; this is expected behavior if the packet's + * ethertype is unrecognized, but otherwise the packet is likely corrupt. */ + NETIO_PKT_STATUS_UNDERSIZE, + /** The packet is oversized and some trailing bytes have been discarded. + This is expected behavior for short packets, since it's impossible to + precisely determine the amount of padding which may have been added to + them to make them meet the minimum Ethernet packet size. */ + NETIO_PKT_STATUS_OVERSIZE, + /** The packet was judged to be corrupt by hardware (for instance, it had + a bad CRC, or part of it was discarded due to lack of buffer space in + the I/O shim) and should be discarded. */ + NETIO_PKT_STATUS_BAD +} netio_pkt_status_t; + + +/** Log2 of how many buckets we have. */ +#define NETIO_LOG2_NUM_BUCKETS (10) + +/** How many buckets we have. + * @ingroup ingress */ +#define NETIO_NUM_BUCKETS (1 << NETIO_LOG2_NUM_BUCKETS) + + +/** + * @brief A group-to-bucket identifier. + * + * @ingroup setup + * + * This tells us what to do with a given group. + */ +typedef union { + /** The header broken down into bits. */ + struct { + /** Whether we should balance on L4, if available */ + unsigned int __balance_on_l4:1; + /** Whether we should balance on L3, if available */ + unsigned int __balance_on_l3:1; + /** Whether we should balance on L2, if available */ + unsigned int __balance_on_l2:1; + /** Reserved for future use */ + unsigned int __reserved:1; + /** The base bucket to use to send traffic */ + unsigned int __bucket_base:NETIO_LOG2_NUM_BUCKETS; + /** The mask to apply to the balancing value. This must be one less + * than a power of two, e.g. 0x3 or 0xFF. + */ + unsigned int __bucket_mask:NETIO_LOG2_NUM_BUCKETS; + /** Pad to 32 bits */ + unsigned int __padding:(32 - 4 - 2 * NETIO_LOG2_NUM_BUCKETS); + } bits; + /** To send out the IDN. */ + unsigned int word; +} +netio_group_t; + + +/** + * @brief A VLAN-to-bucket identifier. + * + * @ingroup setup + * + * This tells us what to do with a given VLAN. + */ +typedef netio_group_t netio_vlan_t; + + +/** + * A bucket-to-queue mapping. + * @ingroup setup + */ +typedef unsigned char netio_bucket_t; + + +/** + * A packet size can always fit in a netio_size_t. + * @ingroup setup + */ +typedef unsigned int netio_size_t; + + +/** + * @brief Ethernet standard (ingress) packet metadata. + * + * @ingroup ingress + * + * This is additional data associated with each packet. + * This structure is opaque and accessed through the @ref ingress. + * + * Also, the buffer population operation currently assumes that standard + * metadata is at least as large as minimal metadata, and will need to be + * modified if that is no longer the case. + */ +typedef struct +{ +#ifdef __DOXYGEN__ + /** This structure is opaque. */ + unsigned char opaque[24]; +#else + /** The overall ordinal of the packet */ + unsigned int __packet_ordinal; + /** The ordinal of the packet within the group */ + unsigned int __group_ordinal; + /** The best flow hash IPP could compute. */ + unsigned int __flow_hash; + /** Flags pertaining to checksum calculation, packet type, etc. */ + unsigned int __flags; + /** The first word of "user data". */ + unsigned int __user_data_0; + /** The second word of "user data". */ + unsigned int __user_data_1; +#endif +} +netio_pkt_metadata_t; + + +/** To ensure that the L3 header is aligned mod 4, the L2 header should be + * aligned mod 4 plus 2, since every supported L2 header is 4n + 2 bytes + * long. The standard way to do this is to simply add 2 bytes of padding + * before the L2 header. + */ +#define NETIO_PACKET_PADDING 2 + + + +/** + * @brief Ethernet minimal (egress) packet metadata. + * + * @ingroup egress + * + * This structure represents information about packets which have + * been processed by @ref netio_populate_buffer() or + * @ref netio_populate_prepend_buffer(). This structure is opaque + * and accessed through the @ref egress. + * + * @internal This structure is actually copied into the memory used by + * standard metadata, which is assumed to be large enough. + */ +typedef struct +{ +#ifdef __DOXYGEN__ + /** This structure is opaque. */ + unsigned char opaque[14]; +#else + /** The offset of the L2 header from the start of the packet data. */ + unsigned short l2_offset; + /** The offset of the L3 header from the start of the packet data. */ + unsigned short l3_offset; + /** Where to write the checksum. */ + unsigned char csum_location; + /** Where to start checksumming from. */ + unsigned char csum_start; + /** Flags pertaining to checksum calculation etc. */ + unsigned short flags; + /** The L2 length of the packet. */ + unsigned short l2_length; + /** The checksum with which to seed the checksum generator. */ + unsigned short csum_seed; + /** How much to checksum. */ + unsigned short csum_length; +#endif +} +netio_pkt_minimal_metadata_t; + + +#ifndef __DOXYGEN__ + +/** + * @brief An I/O notification header. + * + * This is the first word of data received from an I/O shim in a notification + * packet. It contains framing and status information. + */ +typedef union +{ + unsigned int word; /**< The whole word. */ + /** The various fields. */ + struct + { + unsigned int __channel:7; /**< Resource channel. */ + unsigned int __type:4; /**< Type. */ + unsigned int __ack:1; /**< Whether an acknowledgement is needed. */ + unsigned int __reserved:1; /**< Reserved. */ + unsigned int __protocol:1; /**< A protocol-specific word is added. */ + unsigned int __status:2; /**< Status of the transfer. */ + unsigned int __framing:2; /**< Framing of the transfer. */ + unsigned int __transfer_size:14; /**< Transfer size in bytes (total). */ + } bits; +} +__netio_pkt_notif_t; + + +/** + * Returns the base address of the packet. + */ +#define _NETIO_PKT_HANDLE_BASE(p) \ + ((unsigned char*)((p).word & 0xFFFFFFC0)) + +/** + * Returns the base address of the packet. + */ +#define _NETIO_PKT_BASE(p) \ + _NETIO_PKT_HANDLE_BASE(p->__packet) + +/** + * @brief An I/O notification packet (second word) + * + * This is the second word of data received from an I/O shim in a notification + * packet. This is the virtual address of the packet buffer, plus some flag + * bits. (The virtual address of the packet is always 256-byte aligned so we + * have room for 8 bits' worth of flags in the low 8 bits.) + * + * @internal + * NOTE: The low two bits must contain "__queue", so the "packet size" + * (SIZE_SMALL, SIZE_LARGE, or SIZE_JUMBO) can be determined quickly. + * + * If __addr or __offset are moved, _NETIO_PKT_BASE + * (defined right below this) must be changed. + */ +typedef union +{ + unsigned int word; /**< The whole word. */ + /** The various fields. */ + struct + { + /** Which queue the packet will be returned to once it is sent back to + the IPP. This is one of the SIZE_xxx values. */ + unsigned int __queue:2; + + /** The IPP handle of the sending IPP. */ + unsigned int __ipp_handle:2; + + /** Reserved for future use. */ + unsigned int __reserved:1; + + /** If 1, this packet has minimal (egress) metadata; otherwise, it + has standard (ingress) metadata. */ + unsigned int __minimal:1; + + /** Offset of the metadata within the packet. This value is multiplied + * by 64 and added to the base packet address to get the metadata + * address. Note that this field is aligned within the word such that + * you can easily extract the metadata address with a 26-bit mask. */ + unsigned int __offset:2; + + /** The top 24 bits of the packet's virtual address. */ + unsigned int __addr:24; + } bits; +} +__netio_pkt_handle_t; + +#endif /* !__DOXYGEN__ */ + + +/** + * @brief A handle for an I/O packet's storage. + * @ingroup ingress + * + * netio_pkt_handle_t encodes the concept of a ::netio_pkt_t with its + * packet metadata removed. It is a much smaller type that exists to + * facilitate applications where the full ::netio_pkt_t type is too + * large, such as those that cache enormous numbers of packets or wish + * to transmit packet descriptors over the UDN. + * + * Because there is no metadata, most ::netio_pkt_t operations cannot be + * performed on a netio_pkt_handle_t. It supports only + * netio_free_handle() (to free the buffer) and + * NETIO_PKT_CUSTOM_DATA_H() (to access a pointer to its contents). + * The application must acquire any additional metadata it wants from the + * original ::netio_pkt_t and record it separately. + * + * A netio_pkt_handle_t can be extracted from a ::netio_pkt_t by calling + * NETIO_PKT_HANDLE(). An invalid handle (analogous to NULL) can be + * created by assigning the value ::NETIO_PKT_HANDLE_NONE. A handle can + * be tested for validity with NETIO_PKT_HANDLE_IS_VALID(). + */ +typedef struct +{ + unsigned int word; /**< Opaque bits. */ +} netio_pkt_handle_t; + +/** + * @brief A packet descriptor. + * + * @ingroup ingress + * @ingroup egress + * + * This data structure represents a packet. The structure is manipulated + * through the @ref ingress and the @ref egress. + * + * While the contents of a netio_pkt_t are opaque, the structure itself is + * portable. This means that it may be shared between all tiles which have + * done a netio_input_register() call for the interface on which the pkt_t + * was initially received (via netio_get_packet()) or retrieved (via + * netio_get_buffer()). The contents of a netio_pkt_t can be transmitted to + * another tile via shared memory, or via a UDN message, or by other means. + * The destination tile may then use the pkt_t as if it had originally been + * received locally; it may read or write the packet's data, read its + * metadata, free the packet, send the packet, transfer the netio_pkt_t to + * yet another tile, and so forth. + * + * Once a netio_pkt_t has been transferred to a second tile, the first tile + * should not reference the original copy; in particular, if more than one + * tile frees or sends the same netio_pkt_t, the IPP's packet free lists will + * become corrupted. Note also that each tile which reads or modifies + * packet data must obey the memory coherency rules outlined in @ref input. + */ +typedef struct +{ +#ifdef __DOXYGEN__ + /** This structure is opaque. */ + unsigned char opaque[32]; +#else + /** For an ingress packet (one with standard metadata), this is the + * notification header we got from the I/O shim. For an egress packet + * (one with minimal metadata), this word is zero if the packet has not + * been populated, and nonzero if it has. */ + __netio_pkt_notif_t __notif_header; + + /** Virtual address of the packet buffer, plus state flags. */ + __netio_pkt_handle_t __packet; + + /** Metadata associated with the packet. */ + netio_pkt_metadata_t __metadata; +#endif +} +netio_pkt_t; + + +#ifndef __DOXYGEN__ + +#define __NETIO_PKT_NOTIF_HEADER(pkt) ((pkt)->__notif_header) +#define __NETIO_PKT_IPP_HANDLE(pkt) ((pkt)->__packet.bits.__ipp_handle) +#define __NETIO_PKT_QUEUE(pkt) ((pkt)->__packet.bits.__queue) +#define __NETIO_PKT_NOTIF_HEADER_M(mda, pkt) ((pkt)->__notif_header) +#define __NETIO_PKT_IPP_HANDLE_M(mda, pkt) ((pkt)->__packet.bits.__ipp_handle) +#define __NETIO_PKT_MINIMAL(pkt) ((pkt)->__packet.bits.__minimal) +#define __NETIO_PKT_QUEUE_M(mda, pkt) ((pkt)->__packet.bits.__queue) +#define __NETIO_PKT_FLAGS_M(mda, pkt) ((mda)->__flags) + +/* Packet information table, used by the attribute access functions below. */ +extern const uint16_t _netio_pkt_info[]; + +#endif /* __DOXYGEN__ */ + + +#ifndef __DOXYGEN__ +/* These macros are deprecated and will disappear in a future MDE release. */ +#define NETIO_PKT_GOOD_CHECKSUM(pkt) \ + NETIO_PKT_L4_CSUM_CORRECT(pkt) +#define NETIO_PKT_GOOD_CHECKSUM_M(mda, pkt) \ + NETIO_PKT_L4_CSUM_CORRECT_M(mda, pkt) +#endif /* __DOXYGEN__ */ + + +/* Packet attribute access functions. */ + +/** Return a pointer to the metadata for a packet. + * @ingroup ingress + * + * Calling this function once and passing the result to other retrieval + * functions with a "_M" suffix usually improves performance. This + * function must be called on an 'ingress' packet (i.e. one retrieved + * by @ref netio_get_packet(), on which @ref netio_populate_buffer() or + * @ref netio_populate_prepend_buffer have not been called). Use of this + * function on an 'egress' packet will cause an assertion failure. + * + * @param[in] pkt Packet on which to operate. + * @return A pointer to the packet's standard metadata. + */ +static __inline netio_pkt_metadata_t* +NETIO_PKT_METADATA(netio_pkt_t* pkt) +{ + netio_assert(!pkt->__packet.bits.__minimal); + return &pkt->__metadata; +} + + +/** Return a pointer to the minimal metadata for a packet. + * @ingroup egress + * + * Calling this function once and passing the result to other retrieval + * functions with a "_MM" suffix usually improves performance. This + * function must be called on an 'egress' packet (i.e. one on which + * @ref netio_populate_buffer() or @ref netio_populate_prepend_buffer() + * have been called, or one retrieved by @ref netio_get_buffer()). Use of + * this function on an 'ingress' packet will cause an assertion failure. + * + * @param[in] pkt Packet on which to operate. + * @return A pointer to the packet's standard metadata. + */ +static __inline netio_pkt_minimal_metadata_t* +NETIO_PKT_MINIMAL_METADATA(netio_pkt_t* pkt) +{ + netio_assert(pkt->__packet.bits.__minimal); + return (netio_pkt_minimal_metadata_t*) &pkt->__metadata; +} + + +/** Determine whether a packet has 'minimal' metadata. + * @ingroup pktfuncs + * + * This function will return nonzero if the packet is an 'egress' + * packet (i.e. one on which @ref netio_populate_buffer() or + * @ref netio_populate_prepend_buffer() have been called, or one + * retrieved by @ref netio_get_buffer()), and zero if the packet + * is an 'ingress' packet (i.e. one retrieved by @ref netio_get_packet(), + * which has not been converted into an 'egress' packet). + * + * @param[in] pkt Packet on which to operate. + * @return Nonzero if the packet has minimal metadata. + */ +static __inline unsigned int +NETIO_PKT_IS_MINIMAL(netio_pkt_t* pkt) +{ + return pkt->__packet.bits.__minimal; +} + + +/** Return a handle for a packet's storage. + * @ingroup pktfuncs + * + * @param[in] pkt Packet on which to operate. + * @return A handle for the packet's storage. + */ +static __inline netio_pkt_handle_t +NETIO_PKT_HANDLE(netio_pkt_t* pkt) +{ + netio_pkt_handle_t h; + h.word = pkt->__packet.word; + return h; +} + + +/** A special reserved value indicating the absence of a packet handle. + * + * @ingroup pktfuncs + */ +#define NETIO_PKT_HANDLE_NONE ((netio_pkt_handle_t) { 0 }) + + +/** Test whether a packet handle is valid. + * + * Applications may wish to use the reserved value NETIO_PKT_HANDLE_NONE + * to indicate no packet at all. This function tests to see if a packet + * handle is a real handle, not this special reserved value. + * + * @ingroup pktfuncs + * + * @param[in] handle Handle on which to operate. + * @return One if the packet handle is valid, else zero. + */ +static __inline unsigned int +NETIO_PKT_HANDLE_IS_VALID(netio_pkt_handle_t handle) +{ + return handle.word != 0; +} + + + +/** Return a pointer to the start of the packet's custom header. + * A custom header may or may not be present, depending upon the IPP; its + * contents and alignment are also IPP-dependent. Currently, none of the + * standard IPPs supplied by Tilera produce a custom header. If present, + * the custom header precedes the L2 header in the packet buffer. + * @ingroup ingress + * + * @param[in] handle Handle on which to operate. + * @return A pointer to start of the packet. + */ +static __inline unsigned char* +NETIO_PKT_CUSTOM_DATA_H(netio_pkt_handle_t handle) +{ + return _NETIO_PKT_HANDLE_BASE(handle) + NETIO_PACKET_PADDING; +} + + +/** Return the length of the packet's custom header. + * A custom header may or may not be present, depending upon the IPP; its + * contents and alignment are also IPP-dependent. Currently, none of the + * standard IPPs supplied by Tilera produce a custom header. If present, + * the custom header precedes the L2 header in the packet buffer. + * + * @ingroup ingress + * + * @param[in] mda Pointer to packet's standard metadata. + * @param[in] pkt Packet on which to operate. + * @return The length of the packet's custom header, in bytes. + */ +static __inline netio_size_t +NETIO_PKT_CUSTOM_HEADER_LENGTH_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ + /* + * Note that we effectively need to extract a quantity from the flags word + * which is measured in words, and then turn it into bytes by shifting + * it left by 2. We do this all at once by just shifting right two less + * bits, and shifting the mask up two bits. + */ + return ((mda->__flags >> (_NETIO_PKT_CUSTOM_LEN_SHIFT - 2)) & + (_NETIO_PKT_CUSTOM_LEN_RMASK << 2)); +} + + +/** Return the length of the packet, starting with the custom header. + * A custom header may or may not be present, depending upon the IPP; its + * contents and alignment are also IPP-dependent. Currently, none of the + * standard IPPs supplied by Tilera produce a custom header. If present, + * the custom header precedes the L2 header in the packet buffer. + * @ingroup ingress + * + * @param[in] mda Pointer to packet's standard metadata. + * @param[in] pkt Packet on which to operate. + * @return The length of the packet, in bytes. + */ +static __inline netio_size_t +NETIO_PKT_CUSTOM_LENGTH_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ + return (__NETIO_PKT_NOTIF_HEADER(pkt).bits.__transfer_size - + NETIO_PACKET_PADDING); +} + + +/** Return a pointer to the start of the packet's custom header. + * A custom header may or may not be present, depending upon the IPP; its + * contents and alignment are also IPP-dependent. Currently, none of the + * standard IPPs supplied by Tilera produce a custom header. If present, + * the custom header precedes the L2 header in the packet buffer. + * @ingroup ingress + * + * @param[in] mda Pointer to packet's standard metadata. + * @param[in] pkt Packet on which to operate. + * @return A pointer to start of the packet. + */ +static __inline unsigned char* +NETIO_PKT_CUSTOM_DATA_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ + return NETIO_PKT_CUSTOM_DATA_H(NETIO_PKT_HANDLE(pkt)); +} + + +/** Return the length of the packet's L2 (Ethernet plus VLAN or SNAP) header. + * @ingroup ingress + * + * @param[in] mda Pointer to packet's standard metadata. + * @param[in] pkt Packet on which to operate. + * @return The length of the packet's L2 header, in bytes. + */ +static __inline netio_size_t +NETIO_PKT_L2_HEADER_LENGTH_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ + /* + * Note that we effectively need to extract a quantity from the flags word + * which is measured in words, and then turn it into bytes by shifting + * it left by 2. We do this all at once by just shifting right two less + * bits, and shifting the mask up two bits. We then add two bytes. + */ + return ((mda->__flags >> (_NETIO_PKT_L2_LEN_SHIFT - 2)) & + (_NETIO_PKT_L2_LEN_RMASK << 2)) + 2; +} + + +/** Return the length of the packet, starting with the L2 (Ethernet) header. + * @ingroup ingress + * + * @param[in] mda Pointer to packet's standard metadata. + * @param[in] pkt Packet on which to operate. + * @return The length of the packet, in bytes. + */ +static __inline netio_size_t +NETIO_PKT_L2_LENGTH_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ + return (NETIO_PKT_CUSTOM_LENGTH_M(mda, pkt) - + NETIO_PKT_CUSTOM_HEADER_LENGTH_M(mda,pkt)); +} + + +/** Return a pointer to the start of the packet's L2 (Ethernet) header. + * @ingroup ingress + * + * @param[in] mda Pointer to packet's standard metadata. + * @param[in] pkt Packet on which to operate. + * @return A pointer to start of the packet. + */ +static __inline unsigned char* +NETIO_PKT_L2_DATA_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ + return (NETIO_PKT_CUSTOM_DATA_M(mda, pkt) + + NETIO_PKT_CUSTOM_HEADER_LENGTH_M(mda, pkt)); +} + + +/** Retrieve the length of the packet, starting with the L3 (generally, + * the IP) header. + * @ingroup ingress + * + * @param[in] mda Pointer to packet's standard metadata. + * @param[in] pkt Packet on which to operate. + * @return Length of the packet's L3 header and data, in bytes. + */ +static __inline netio_size_t +NETIO_PKT_L3_LENGTH_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ + return (NETIO_PKT_L2_LENGTH_M(mda, pkt) - + NETIO_PKT_L2_HEADER_LENGTH_M(mda,pkt)); +} + + +/** Return a pointer to the packet's L3 (generally, the IP) header. + * @ingroup ingress + * + * Note that we guarantee word alignment of the L3 header. + * + * @param[in] mda Pointer to packet's standard metadata. + * @param[in] pkt Packet on which to operate. + * @return A pointer to the packet's L3 header. + */ +static __inline unsigned char* +NETIO_PKT_L3_DATA_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ + return (NETIO_PKT_L2_DATA_M(mda, pkt) + + NETIO_PKT_L2_HEADER_LENGTH_M(mda, pkt)); +} + + +/** Return the ordinal of the packet. + * @ingroup ingress + * + * Each packet is given an ordinal number when it is delivered by the IPP. + * In the medium term, the ordinal is unique and monotonically increasing, + * being incremented by 1 for each packet; the ordinal of the first packet + * delivered after the IPP starts is zero. (Since the ordinal is of finite + * size, given enough input packets, it will eventually wrap around to zero; + * in the long term, therefore, ordinals are not unique.) The ordinals + * handed out by different IPPs are not disjoint, so two packets from + * different IPPs may have identical ordinals. Packets dropped by the + * IPP or by the I/O shim are not assigned ordinals. + * + * @param[in] mda Pointer to packet's standard metadata. + * @param[in] pkt Packet on which to operate. + * @return The packet's per-IPP packet ordinal. + */ +static __inline unsigned int +NETIO_PKT_ORDINAL_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ + return mda->__packet_ordinal; +} + + +/** Return the per-group ordinal of the packet. + * @ingroup ingress + * + * Each packet is given a per-group ordinal number when it is + * delivered by the IPP. By default, the group is the packet's VLAN, + * although IPP can be recompiled to use different values. In + * the medium term, the ordinal is unique and monotonically + * increasing, being incremented by 1 for each packet; the ordinal of + * the first packet distributed to a particular group is zero. + * (Since the ordinal is of finite size, given enough input packets, + * it will eventually wrap around to zero; in the long term, + * therefore, ordinals are not unique.) The ordinals handed out by + * different IPPs are not disjoint, so two packets from different IPPs + * may have identical ordinals; similarly, packets distributed to + * different groups may have identical ordinals. Packets dropped by + * the IPP or by the I/O shim are not assigned ordinals. + * + * @param[in] mda Pointer to packet's standard metadata. + * @param[in] pkt Packet on which to operate. + * @return The packet's per-IPP, per-group ordinal. + */ +static __inline unsigned int +NETIO_PKT_GROUP_ORDINAL_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ + return mda->__group_ordinal; +} + + +/** Return the VLAN ID assigned to the packet. + * @ingroup ingress + * + * This value is usually contained within the packet header. + * + * This value will be zero if the packet does not have a VLAN tag, or if + * this value was not extracted from the packet. + * + * @param[in] mda Pointer to packet's standard metadata. + * @param[in] pkt Packet on which to operate. + * @return The packet's VLAN ID. + */ +static __inline unsigned short +NETIO_PKT_VLAN_ID_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ + int vl = (mda->__flags >> _NETIO_PKT_VLAN_SHIFT) & _NETIO_PKT_VLAN_RMASK; + unsigned short* pkt_p; + int index; + unsigned short val; + + if (vl == _NETIO_PKT_VLAN_NONE) + return 0; + + pkt_p = (unsigned short*) NETIO_PKT_L2_DATA_M(mda, pkt); + index = (mda->__flags >> _NETIO_PKT_TYPE_SHIFT) & _NETIO_PKT_TYPE_RMASK; + + val = pkt_p[(_netio_pkt_info[index] >> _NETIO_PKT_INFO_VLAN_SHIFT) & + _NETIO_PKT_INFO_VLAN_RMASK]; + +#ifdef __TILECC__ + return (__insn_bytex(val) >> 16) & 0xFFF; +#else + return (__builtin_bswap32(val) >> 16) & 0xFFF; +#endif +} + + +/** Return the ethertype of the packet. + * @ingroup ingress + * + * This value is usually contained within the packet header. + * + * This value is reliable if @ref NETIO_PKT_ETHERTYPE_RECOGNIZED_M() + * returns true, and otherwise, may not be well defined. + * + * @param[in] mda Pointer to packet's standard metadata. + * @param[in] pkt Packet on which to operate. + * @return The packet's ethertype. + */ +static __inline unsigned short +NETIO_PKT_ETHERTYPE_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ + unsigned short* pkt_p = (unsigned short*) NETIO_PKT_L2_DATA_M(mda, pkt); + int index = (mda->__flags >> _NETIO_PKT_TYPE_SHIFT) & _NETIO_PKT_TYPE_RMASK; + + unsigned short val = + pkt_p[(_netio_pkt_info[index] >> _NETIO_PKT_INFO_ETYPE_SHIFT) & + _NETIO_PKT_INFO_ETYPE_RMASK]; + + return __builtin_bswap32(val) >> 16; +} + + +/** Return the flow hash computed on the packet. + * @ingroup ingress + * + * For TCP and UDP packets, this hash is calculated by hashing together + * the "5-tuple" values, specifically the source IP address, destination + * IP address, protocol type, source port and destination port. + * The hash value is intended to be helpful for millions of distinct + * flows. + * + * For IPv4 or IPv6 packets which are neither TCP nor UDP, the flow hash is + * derived by hashing together the source and destination IP addresses. + * + * For MPLS-encapsulated packets, the flow hash is derived by hashing + * the first MPLS label. + * + * For all other packets the flow hash is computed from the source + * and destination Ethernet addresses. + * + * The hash is symmetric, meaning it produces the same value if the + * source and destination are swapped. The only exceptions are + * tunneling protocols 0x04 (IP in IP Encapsulation), 0x29 (Simple + * Internet Protocol), 0x2F (General Routing Encapsulation) and 0x32 + * (Encap Security Payload), which use only the destination address + * since the source address is not meaningful. + * + * @param[in] mda Pointer to packet's standard metadata. + * @param[in] pkt Packet on which to operate. + * @return The packet's 32-bit flow hash. + */ +static __inline unsigned int +NETIO_PKT_FLOW_HASH_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ + return mda->__flow_hash; +} + + +/** Return the first word of "user data" for the packet. + * + * The contents of the user data words depend on the IPP. + * + * When using the standard ipp1, ipp2, or ipp4 sub-drivers, the first + * word of user data contains the least significant bits of the 64-bit + * arrival cycle count (see @c get_cycle_count_low()). + * + * See the <em>System Programmer's Guide</em> for details. + * + * @ingroup ingress + * + * @param[in] mda Pointer to packet's standard metadata. + * @param[in] pkt Packet on which to operate. + * @return The packet's first word of "user data". + */ +static __inline unsigned int +NETIO_PKT_USER_DATA_0_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ + return mda->__user_data_0; +} + + +/** Return the second word of "user data" for the packet. + * + * The contents of the user data words depend on the IPP. + * + * When using the standard ipp1, ipp2, or ipp4 sub-drivers, the second + * word of user data contains the most significant bits of the 64-bit + * arrival cycle count (see @c get_cycle_count_high()). + * + * See the <em>System Programmer's Guide</em> for details. + * + * @ingroup ingress + * + * @param[in] mda Pointer to packet's standard metadata. + * @param[in] pkt Packet on which to operate. + * @return The packet's second word of "user data". + */ +static __inline unsigned int +NETIO_PKT_USER_DATA_1_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ + return mda->__user_data_1; +} + + +/** Determine whether the L4 (TCP/UDP) checksum was calculated. + * @ingroup ingress + * + * @param[in] mda Pointer to packet's standard metadata. + * @param[in] pkt Packet on which to operate. + * @return Nonzero if the L4 checksum was calculated. + */ +static __inline unsigned int +NETIO_PKT_L4_CSUM_CALCULATED_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ + return !(mda->__flags & _NETIO_PKT_NO_L4_CSUM_MASK); +} + + +/** Determine whether the L4 (TCP/UDP) checksum was calculated and found to + * be correct. + * @ingroup ingress + * + * @param[in] mda Pointer to packet's standard metadata. + * @param[in] pkt Packet on which to operate. + * @return Nonzero if the checksum was calculated and is correct. + */ +static __inline unsigned int +NETIO_PKT_L4_CSUM_CORRECT_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ + return !(mda->__flags & + (_NETIO_PKT_BAD_L4_CSUM_MASK | _NETIO_PKT_NO_L4_CSUM_MASK)); +} + + +/** Determine whether the L3 (IP) checksum was calculated. + * @ingroup ingress + * + * @param[in] mda Pointer to packet's standard metadata. + * @param[in] pkt Packet on which to operate. + * @return Nonzero if the L3 (IP) checksum was calculated. +*/ +static __inline unsigned int +NETIO_PKT_L3_CSUM_CALCULATED_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ + return !(mda->__flags & _NETIO_PKT_NO_L3_CSUM_MASK); +} + + +/** Determine whether the L3 (IP) checksum was calculated and found to be + * correct. + * @ingroup ingress + * + * @param[in] mda Pointer to packet's standard metadata. + * @param[in] pkt Packet on which to operate. + * @return Nonzero if the checksum was calculated and is correct. + */ +static __inline unsigned int +NETIO_PKT_L3_CSUM_CORRECT_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ + return !(mda->__flags & + (_NETIO_PKT_BAD_L3_CSUM_MASK | _NETIO_PKT_NO_L3_CSUM_MASK)); +} + + +/** Determine whether the ethertype was recognized and L3 packet data was + * processed. + * @ingroup ingress + * + * @param[in] mda Pointer to packet's standard metadata. + * @param[in] pkt Packet on which to operate. + * @return Nonzero if the ethertype was recognized and L3 packet data was + * processed. + */ +static __inline unsigned int +NETIO_PKT_ETHERTYPE_RECOGNIZED_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ + return !(mda->__flags & _NETIO_PKT_TYPE_UNRECOGNIZED_MASK); +} + + +/** Retrieve the status of a packet and any errors that may have occurred + * during ingress processing (length mismatches, CRC errors, etc.). + * @ingroup ingress + * + * Note that packets for which @ref NETIO_PKT_ETHERTYPE_RECOGNIZED() + * returns zero are always reported as underlength, as there is no a priori + * means to determine their length. Normally, applications should use + * @ref NETIO_PKT_BAD_M() instead of explicitly checking status with this + * function. + * + * @param[in] mda Pointer to packet's standard metadata. + * @param[in] pkt Packet on which to operate. + * @return The packet's status. + */ +static __inline netio_pkt_status_t +NETIO_PKT_STATUS_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ + return (netio_pkt_status_t) __NETIO_PKT_NOTIF_HEADER(pkt).bits.__status; +} + + +/** Report whether a packet is bad (i.e., was shorter than expected based on + * its headers, or had a bad CRC). + * @ingroup ingress + * + * Note that this function does not verify L3 or L4 checksums. + * + * @param[in] mda Pointer to packet's standard metadata. + * @param[in] pkt Packet on which to operate. + * @return Nonzero if the packet is bad and should be discarded. + */ +static __inline unsigned int +NETIO_PKT_BAD_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ + return ((NETIO_PKT_STATUS_M(mda, pkt) & 1) && + (NETIO_PKT_ETHERTYPE_RECOGNIZED_M(mda, pkt) || + NETIO_PKT_STATUS_M(mda, pkt) == NETIO_PKT_STATUS_BAD)); +} + + +/** Return the length of the packet, starting with the L2 (Ethernet) header. + * @ingroup egress + * + * @param[in] mmd Pointer to packet's minimal metadata. + * @param[in] pkt Packet on which to operate. + * @return The length of the packet, in bytes. + */ +static __inline netio_size_t +NETIO_PKT_L2_LENGTH_MM(netio_pkt_minimal_metadata_t* mmd, netio_pkt_t* pkt) +{ + return mmd->l2_length; +} + + +/** Return the length of the L2 (Ethernet) header. + * @ingroup egress + * + * @param[in] mmd Pointer to packet's minimal metadata. + * @param[in] pkt Packet on which to operate. + * @return The length of the packet's L2 header, in bytes. + */ +static __inline netio_size_t +NETIO_PKT_L2_HEADER_LENGTH_MM(netio_pkt_minimal_metadata_t* mmd, + netio_pkt_t* pkt) +{ + return mmd->l3_offset - mmd->l2_offset; +} + + +/** Return the length of the packet, starting with the L3 (IP) header. + * @ingroup egress + * + * @param[in] mmd Pointer to packet's minimal metadata. + * @param[in] pkt Packet on which to operate. + * @return Length of the packet's L3 header and data, in bytes. + */ +static __inline netio_size_t +NETIO_PKT_L3_LENGTH_MM(netio_pkt_minimal_metadata_t* mmd, netio_pkt_t* pkt) +{ + return (NETIO_PKT_L2_LENGTH_MM(mmd, pkt) - + NETIO_PKT_L2_HEADER_LENGTH_MM(mmd, pkt)); +} + + +/** Return a pointer to the packet's L3 (generally, the IP) header. + * @ingroup egress + * + * Note that we guarantee word alignment of the L3 header. + * + * @param[in] mmd Pointer to packet's minimal metadata. + * @param[in] pkt Packet on which to operate. + * @return A pointer to the packet's L3 header. + */ +static __inline unsigned char* +NETIO_PKT_L3_DATA_MM(netio_pkt_minimal_metadata_t* mmd, netio_pkt_t* pkt) +{ + return _NETIO_PKT_BASE(pkt) + mmd->l3_offset; +} + + +/** Return a pointer to the packet's L2 (Ethernet) header. + * @ingroup egress + * + * @param[in] mmd Pointer to packet's minimal metadata. + * @param[in] pkt Packet on which to operate. + * @return A pointer to start of the packet. + */ +static __inline unsigned char* +NETIO_PKT_L2_DATA_MM(netio_pkt_minimal_metadata_t* mmd, netio_pkt_t* pkt) +{ + return _NETIO_PKT_BASE(pkt) + mmd->l2_offset; +} + + +/** Retrieve the status of a packet and any errors that may have occurred + * during ingress processing (length mismatches, CRC errors, etc.). + * @ingroup ingress + * + * Note that packets for which @ref NETIO_PKT_ETHERTYPE_RECOGNIZED() + * returns zero are always reported as underlength, as there is no a priori + * means to determine their length. Normally, applications should use + * @ref NETIO_PKT_BAD() instead of explicitly checking status with this + * function. + * + * @param[in] pkt Packet on which to operate. + * @return The packet's status. + */ +static __inline netio_pkt_status_t +NETIO_PKT_STATUS(netio_pkt_t* pkt) +{ + netio_assert(!pkt->__packet.bits.__minimal); + + return (netio_pkt_status_t) __NETIO_PKT_NOTIF_HEADER(pkt).bits.__status; +} + + +/** Report whether a packet is bad (i.e., was shorter than expected based on + * its headers, or had a bad CRC). + * @ingroup ingress + * + * Note that this function does not verify L3 or L4 checksums. + * + * @param[in] pkt Packet on which to operate. + * @return Nonzero if the packet is bad and should be discarded. + */ +static __inline unsigned int +NETIO_PKT_BAD(netio_pkt_t* pkt) +{ + netio_pkt_metadata_t* mda = NETIO_PKT_METADATA(pkt); + + return NETIO_PKT_BAD_M(mda, pkt); +} + + +/** Return the length of the packet's custom header. + * A custom header may or may not be present, depending upon the IPP; its + * contents and alignment are also IPP-dependent. Currently, none of the + * standard IPPs supplied by Tilera produce a custom header. If present, + * the custom header precedes the L2 header in the packet buffer. + * @ingroup pktfuncs + * + * @param[in] pkt Packet on which to operate. + * @return The length of the packet's custom header, in bytes. + */ +static __inline netio_size_t +NETIO_PKT_CUSTOM_HEADER_LENGTH(netio_pkt_t* pkt) +{ + netio_pkt_metadata_t* mda = NETIO_PKT_METADATA(pkt); + + return NETIO_PKT_CUSTOM_HEADER_LENGTH_M(mda, pkt); +} + + +/** Return the length of the packet, starting with the custom header. + * A custom header may or may not be present, depending upon the IPP; its + * contents and alignment are also IPP-dependent. Currently, none of the + * standard IPPs supplied by Tilera produce a custom header. If present, + * the custom header precedes the L2 header in the packet buffer. + * @ingroup pktfuncs + * + * @param[in] pkt Packet on which to operate. + * @return The length of the packet, in bytes. + */ +static __inline netio_size_t +NETIO_PKT_CUSTOM_LENGTH(netio_pkt_t* pkt) +{ + netio_pkt_metadata_t* mda = NETIO_PKT_METADATA(pkt); + + return NETIO_PKT_CUSTOM_LENGTH_M(mda, pkt); +} + + +/** Return a pointer to the packet's custom header. + * A custom header may or may not be present, depending upon the IPP; its + * contents and alignment are also IPP-dependent. Currently, none of the + * standard IPPs supplied by Tilera produce a custom header. If present, + * the custom header precedes the L2 header in the packet buffer. + * @ingroup pktfuncs + * + * @param[in] pkt Packet on which to operate. + * @return A pointer to start of the packet. + */ +static __inline unsigned char* +NETIO_PKT_CUSTOM_DATA(netio_pkt_t* pkt) +{ + netio_pkt_metadata_t* mda = NETIO_PKT_METADATA(pkt); + + return NETIO_PKT_CUSTOM_DATA_M(mda, pkt); +} + + +/** Return the length of the packet's L2 (Ethernet plus VLAN or SNAP) header. + * @ingroup pktfuncs + * + * @param[in] pkt Packet on which to operate. + * @return The length of the packet's L2 header, in bytes. + */ +static __inline netio_size_t +NETIO_PKT_L2_HEADER_LENGTH(netio_pkt_t* pkt) +{ + if (NETIO_PKT_IS_MINIMAL(pkt)) + { + netio_pkt_minimal_metadata_t* mmd = NETIO_PKT_MINIMAL_METADATA(pkt); + + return NETIO_PKT_L2_HEADER_LENGTH_MM(mmd, pkt); + } + else + { + netio_pkt_metadata_t* mda = NETIO_PKT_METADATA(pkt); + + return NETIO_PKT_L2_HEADER_LENGTH_M(mda, pkt); + } +} + + +/** Return the length of the packet, starting with the L2 (Ethernet) header. + * @ingroup pktfuncs + * + * @param[in] pkt Packet on which to operate. + * @return The length of the packet, in bytes. + */ +static __inline netio_size_t +NETIO_PKT_L2_LENGTH(netio_pkt_t* pkt) +{ + if (NETIO_PKT_IS_MINIMAL(pkt)) + { + netio_pkt_minimal_metadata_t* mmd = NETIO_PKT_MINIMAL_METADATA(pkt); + + return NETIO_PKT_L2_LENGTH_MM(mmd, pkt); + } + else + { + netio_pkt_metadata_t* mda = NETIO_PKT_METADATA(pkt); + + return NETIO_PKT_L2_LENGTH_M(mda, pkt); + } +} + + +/** Return a pointer to the packet's L2 (Ethernet) header. + * @ingroup pktfuncs + * + * @param[in] pkt Packet on which to operate. + * @return A pointer to start of the packet. + */ +static __inline unsigned char* +NETIO_PKT_L2_DATA(netio_pkt_t* pkt) +{ + if (NETIO_PKT_IS_MINIMAL(pkt)) + { + netio_pkt_minimal_metadata_t* mmd = NETIO_PKT_MINIMAL_METADATA(pkt); + + return NETIO_PKT_L2_DATA_MM(mmd, pkt); + } + else + { + netio_pkt_metadata_t* mda = NETIO_PKT_METADATA(pkt); + + return NETIO_PKT_L2_DATA_M(mda, pkt); + } +} + + +/** Retrieve the length of the packet, starting with the L3 (generally, the IP) + * header. + * @ingroup pktfuncs + * + * @param[in] pkt Packet on which to operate. + * @return Length of the packet's L3 header and data, in bytes. + */ +static __inline netio_size_t +NETIO_PKT_L3_LENGTH(netio_pkt_t* pkt) +{ + if (NETIO_PKT_IS_MINIMAL(pkt)) + { + netio_pkt_minimal_metadata_t* mmd = NETIO_PKT_MINIMAL_METADATA(pkt); + + return NETIO_PKT_L3_LENGTH_MM(mmd, pkt); + } + else + { + netio_pkt_metadata_t* mda = NETIO_PKT_METADATA(pkt); + + return NETIO_PKT_L3_LENGTH_M(mda, pkt); + } +} + + +/** Return a pointer to the packet's L3 (generally, the IP) header. + * @ingroup pktfuncs + * + * Note that we guarantee word alignment of the L3 header. + * + * @param[in] pkt Packet on which to operate. + * @return A pointer to the packet's L3 header. + */ +static __inline unsigned char* +NETIO_PKT_L3_DATA(netio_pkt_t* pkt) +{ + if (NETIO_PKT_IS_MINIMAL(pkt)) + { + netio_pkt_minimal_metadata_t* mmd = NETIO_PKT_MINIMAL_METADATA(pkt); + + return NETIO_PKT_L3_DATA_MM(mmd, pkt); + } + else + { + netio_pkt_metadata_t* mda = NETIO_PKT_METADATA(pkt); + + return NETIO_PKT_L3_DATA_M(mda, pkt); + } +} + + +/** Return the ordinal of the packet. + * @ingroup ingress + * + * Each packet is given an ordinal number when it is delivered by the IPP. + * In the medium term, the ordinal is unique and monotonically increasing, + * being incremented by 1 for each packet; the ordinal of the first packet + * delivered after the IPP starts is zero. (Since the ordinal is of finite + * size, given enough input packets, it will eventually wrap around to zero; + * in the long term, therefore, ordinals are not unique.) The ordinals + * handed out by different IPPs are not disjoint, so two packets from + * different IPPs may have identical ordinals. Packets dropped by the + * IPP or by the I/O shim are not assigned ordinals. + * + * + * @param[in] pkt Packet on which to operate. + * @return The packet's per-IPP packet ordinal. + */ +static __inline unsigned int +NETIO_PKT_ORDINAL(netio_pkt_t* pkt) +{ + netio_pkt_metadata_t* mda = NETIO_PKT_METADATA(pkt); + + return NETIO_PKT_ORDINAL_M(mda, pkt); +} + + +/** Return the per-group ordinal of the packet. + * @ingroup ingress + * + * Each packet is given a per-group ordinal number when it is + * delivered by the IPP. By default, the group is the packet's VLAN, + * although IPP can be recompiled to use different values. In + * the medium term, the ordinal is unique and monotonically + * increasing, being incremented by 1 for each packet; the ordinal of + * the first packet distributed to a particular group is zero. + * (Since the ordinal is of finite size, given enough input packets, + * it will eventually wrap around to zero; in the long term, + * therefore, ordinals are not unique.) The ordinals handed out by + * different IPPs are not disjoint, so two packets from different IPPs + * may have identical ordinals; similarly, packets distributed to + * different groups may have identical ordinals. Packets dropped by + * the IPP or by the I/O shim are not assigned ordinals. + * + * @param[in] pkt Packet on which to operate. + * @return The packet's per-IPP, per-group ordinal. + */ +static __inline unsigned int +NETIO_PKT_GROUP_ORDINAL(netio_pkt_t* pkt) +{ + netio_pkt_metadata_t* mda = NETIO_PKT_METADATA(pkt); + + return NETIO_PKT_GROUP_ORDINAL_M(mda, pkt); +} + + +/** Return the VLAN ID assigned to the packet. + * @ingroup ingress + * + * This is usually also contained within the packet header. If the packet + * does not have a VLAN tag, the VLAN ID returned by this function is zero. + * + * @param[in] pkt Packet on which to operate. + * @return The packet's VLAN ID. + */ +static __inline unsigned short +NETIO_PKT_VLAN_ID(netio_pkt_t* pkt) +{ + netio_pkt_metadata_t* mda = NETIO_PKT_METADATA(pkt); + + return NETIO_PKT_VLAN_ID_M(mda, pkt); +} + + +/** Return the ethertype of the packet. + * @ingroup ingress + * + * This value is reliable if @ref NETIO_PKT_ETHERTYPE_RECOGNIZED() + * returns true, and otherwise, may not be well defined. + * + * @param[in] pkt Packet on which to operate. + * @return The packet's ethertype. + */ +static __inline unsigned short +NETIO_PKT_ETHERTYPE(netio_pkt_t* pkt) +{ + netio_pkt_metadata_t* mda = NETIO_PKT_METADATA(pkt); + + return NETIO_PKT_ETHERTYPE_M(mda, pkt); +} + + +/** Return the flow hash computed on the packet. + * @ingroup ingress + * + * For TCP and UDP packets, this hash is calculated by hashing together + * the "5-tuple" values, specifically the source IP address, destination + * IP address, protocol type, source port and destination port. + * The hash value is intended to be helpful for millions of distinct + * flows. + * + * For IPv4 or IPv6 packets which are neither TCP nor UDP, the flow hash is + * derived by hashing together the source and destination IP addresses. + * + * For MPLS-encapsulated packets, the flow hash is derived by hashing + * the first MPLS label. + * + * For all other packets the flow hash is computed from the source + * and destination Ethernet addresses. + * + * The hash is symmetric, meaning it produces the same value if the + * source and destination are swapped. The only exceptions are + * tunneling protocols 0x04 (IP in IP Encapsulation), 0x29 (Simple + * Internet Protocol), 0x2F (General Routing Encapsulation) and 0x32 + * (Encap Security Payload), which use only the destination address + * since the source address is not meaningful. + * + * @param[in] pkt Packet on which to operate. + * @return The packet's 32-bit flow hash. + */ +static __inline unsigned int +NETIO_PKT_FLOW_HASH(netio_pkt_t* pkt) +{ + netio_pkt_metadata_t* mda = NETIO_PKT_METADATA(pkt); + + return NETIO_PKT_FLOW_HASH_M(mda, pkt); +} + + +/** Return the first word of "user data" for the packet. + * + * The contents of the user data words depend on the IPP. + * + * When using the standard ipp1, ipp2, or ipp4 sub-drivers, the first + * word of user data contains the least significant bits of the 64-bit + * arrival cycle count (see @c get_cycle_count_low()). + * + * See the <em>System Programmer's Guide</em> for details. + * + * @ingroup ingress + * + * @param[in] pkt Packet on which to operate. + * @return The packet's first word of "user data". + */ +static __inline unsigned int +NETIO_PKT_USER_DATA_0(netio_pkt_t* pkt) +{ + netio_pkt_metadata_t* mda = NETIO_PKT_METADATA(pkt); + + return NETIO_PKT_USER_DATA_0_M(mda, pkt); +} + + +/** Return the second word of "user data" for the packet. + * + * The contents of the user data words depend on the IPP. + * + * When using the standard ipp1, ipp2, or ipp4 sub-drivers, the second + * word of user data contains the most significant bits of the 64-bit + * arrival cycle count (see @c get_cycle_count_high()). + * + * See the <em>System Programmer's Guide</em> for details. + * + * @ingroup ingress + * + * @param[in] pkt Packet on which to operate. + * @return The packet's second word of "user data". + */ +static __inline unsigned int +NETIO_PKT_USER_DATA_1(netio_pkt_t* pkt) +{ + netio_pkt_metadata_t* mda = NETIO_PKT_METADATA(pkt); + + return NETIO_PKT_USER_DATA_1_M(mda, pkt); +} + + +/** Determine whether the L4 (TCP/UDP) checksum was calculated. + * @ingroup ingress + * + * @param[in] pkt Packet on which to operate. + * @return Nonzero if the L4 checksum was calculated. + */ +static __inline unsigned int +NETIO_PKT_L4_CSUM_CALCULATED(netio_pkt_t* pkt) +{ + netio_pkt_metadata_t* mda = NETIO_PKT_METADATA(pkt); + + return NETIO_PKT_L4_CSUM_CALCULATED_M(mda, pkt); +} + + +/** Determine whether the L4 (TCP/UDP) checksum was calculated and found to + * be correct. + * @ingroup ingress + * + * @param[in] pkt Packet on which to operate. + * @return Nonzero if the checksum was calculated and is correct. + */ +static __inline unsigned int +NETIO_PKT_L4_CSUM_CORRECT(netio_pkt_t* pkt) +{ + netio_pkt_metadata_t* mda = NETIO_PKT_METADATA(pkt); + + return NETIO_PKT_L4_CSUM_CORRECT_M(mda, pkt); +} + + +/** Determine whether the L3 (IP) checksum was calculated. + * @ingroup ingress + * + * @param[in] pkt Packet on which to operate. + * @return Nonzero if the L3 (IP) checksum was calculated. +*/ +static __inline unsigned int +NETIO_PKT_L3_CSUM_CALCULATED(netio_pkt_t* pkt) +{ + netio_pkt_metadata_t* mda = NETIO_PKT_METADATA(pkt); + + return NETIO_PKT_L3_CSUM_CALCULATED_M(mda, pkt); +} + + +/** Determine whether the L3 (IP) checksum was calculated and found to be + * correct. + * @ingroup ingress + * + * @param[in] pkt Packet on which to operate. + * @return Nonzero if the checksum was calculated and is correct. + */ +static __inline unsigned int +NETIO_PKT_L3_CSUM_CORRECT(netio_pkt_t* pkt) +{ + netio_pkt_metadata_t* mda = NETIO_PKT_METADATA(pkt); + + return NETIO_PKT_L3_CSUM_CORRECT_M(mda, pkt); +} + + +/** Determine whether the Ethertype was recognized and L3 packet data was + * processed. + * @ingroup ingress + * + * @param[in] pkt Packet on which to operate. + * @return Nonzero if the Ethertype was recognized and L3 packet data was + * processed. + */ +static __inline unsigned int +NETIO_PKT_ETHERTYPE_RECOGNIZED(netio_pkt_t* pkt) +{ + netio_pkt_metadata_t* mda = NETIO_PKT_METADATA(pkt); + + return NETIO_PKT_ETHERTYPE_RECOGNIZED_M(mda, pkt); +} + + +/** Set an egress packet's L2 length, using a metadata pointer to speed the + * computation. + * @ingroup egress + * + * @param[in,out] mmd Pointer to packet's minimal metadata. + * @param[in] pkt Packet on which to operate. + * @param[in] len Packet L2 length, in bytes. + */ +static __inline void +NETIO_PKT_SET_L2_LENGTH_MM(netio_pkt_minimal_metadata_t* mmd, netio_pkt_t* pkt, + int len) +{ + mmd->l2_length = len; +} + + +/** Set an egress packet's L2 length. + * @ingroup egress + * + * @param[in,out] pkt Packet on which to operate. + * @param[in] len Packet L2 length, in bytes. + */ +static __inline void +NETIO_PKT_SET_L2_LENGTH(netio_pkt_t* pkt, int len) +{ + netio_pkt_minimal_metadata_t* mmd = NETIO_PKT_MINIMAL_METADATA(pkt); + + NETIO_PKT_SET_L2_LENGTH_MM(mmd, pkt, len); +} + + +/** Set an egress packet's L2 header length, using a metadata pointer to + * speed the computation. + * @ingroup egress + * + * It is not normally necessary to call this routine; only the L2 length, + * not the header length, is needed to transmit a packet. It may be useful if + * the egress packet will later be processed by code which expects to use + * functions like @ref NETIO_PKT_L3_DATA() to get a pointer to the L3 payload. + * + * @param[in,out] mmd Pointer to packet's minimal metadata. + * @param[in] pkt Packet on which to operate. + * @param[in] len Packet L2 header length, in bytes. + */ +static __inline void +NETIO_PKT_SET_L2_HEADER_LENGTH_MM(netio_pkt_minimal_metadata_t* mmd, + netio_pkt_t* pkt, int len) +{ + mmd->l3_offset = mmd->l2_offset + len; +} + + +/** Set an egress packet's L2 header length. + * @ingroup egress + * + * It is not normally necessary to call this routine; only the L2 length, + * not the header length, is needed to transmit a packet. It may be useful if + * the egress packet will later be processed by code which expects to use + * functions like @ref NETIO_PKT_L3_DATA() to get a pointer to the L3 payload. + * + * @param[in,out] pkt Packet on which to operate. + * @param[in] len Packet L2 header length, in bytes. + */ +static __inline void +NETIO_PKT_SET_L2_HEADER_LENGTH(netio_pkt_t* pkt, int len) +{ + netio_pkt_minimal_metadata_t* mmd = NETIO_PKT_MINIMAL_METADATA(pkt); + + NETIO_PKT_SET_L2_HEADER_LENGTH_MM(mmd, pkt, len); +} + + +/** Set up an egress packet for hardware checksum computation, using a + * metadata pointer to speed the operation. + * @ingroup egress + * + * NetIO provides the ability to automatically calculate a standard + * 16-bit Internet checksum on transmitted packets. The application + * may specify the point in the packet where the checksum starts, the + * number of bytes to be checksummed, and the two bytes in the packet + * which will be replaced with the completed checksum. (If the range + * of bytes to be checksummed includes the bytes to be replaced, the + * initial values of those bytes will be included in the checksum.) + * + * For some protocols, the packet checksum covers data which is not present + * in the packet, or is at least not contiguous to the main data payload. + * For instance, the TCP checksum includes a "pseudo-header" which includes + * the source and destination IP addresses of the packet. To accommodate + * this, the checksum engine may be "seeded" with an initial value, which + * the application would need to compute based on the specific protocol's + * requirements. Note that the seed is given in host byte order (little- + * endian), not network byte order (big-endian); code written to compute a + * pseudo-header checksum in network byte order will need to byte-swap it + * before use as the seed. + * + * Note that the checksum is computed as part of the transmission process, + * so it will not be present in the packet upon completion of this routine. + * + * @param[in,out] mmd Pointer to packet's minimal metadata. + * @param[in] pkt Packet on which to operate. + * @param[in] start Offset within L2 packet of the first byte to include in + * the checksum. + * @param[in] length Number of bytes to include in the checksum. + * the checksum. + * @param[in] location Offset within L2 packet of the first of the two bytes + * to be replaced with the calculated checksum. + * @param[in] seed Initial value of the running checksum before any of the + * packet data is added. + */ +static __inline void +NETIO_PKT_DO_EGRESS_CSUM_MM(netio_pkt_minimal_metadata_t* mmd, + netio_pkt_t* pkt, int start, int length, + int location, uint16_t seed) +{ + mmd->csum_start = start; + mmd->csum_length = length; + mmd->csum_location = location; + mmd->csum_seed = seed; + mmd->flags |= _NETIO_PKT_NEED_EDMA_CSUM_MASK; +} + + +/** Set up an egress packet for hardware checksum computation. + * @ingroup egress + * + * NetIO provides the ability to automatically calculate a standard + * 16-bit Internet checksum on transmitted packets. The application + * may specify the point in the packet where the checksum starts, the + * number of bytes to be checksummed, and the two bytes in the packet + * which will be replaced with the completed checksum. (If the range + * of bytes to be checksummed includes the bytes to be replaced, the + * initial values of those bytes will be included in the checksum.) + * + * For some protocols, the packet checksum covers data which is not present + * in the packet, or is at least not contiguous to the main data payload. + * For instance, the TCP checksum includes a "pseudo-header" which includes + * the source and destination IP addresses of the packet. To accommodate + * this, the checksum engine may be "seeded" with an initial value, which + * the application would need to compute based on the specific protocol's + * requirements. Note that the seed is given in host byte order (little- + * endian), not network byte order (big-endian); code written to compute a + * pseudo-header checksum in network byte order will need to byte-swap it + * before use as the seed. + * + * Note that the checksum is computed as part of the transmission process, + * so it will not be present in the packet upon completion of this routine. + * + * @param[in,out] pkt Packet on which to operate. + * @param[in] start Offset within L2 packet of the first byte to include in + * the checksum. + * @param[in] length Number of bytes to include in the checksum. + * the checksum. + * @param[in] location Offset within L2 packet of the first of the two bytes + * to be replaced with the calculated checksum. + * @param[in] seed Initial value of the running checksum before any of the + * packet data is added. + */ +static __inline void +NETIO_PKT_DO_EGRESS_CSUM(netio_pkt_t* pkt, int start, int length, + int location, uint16_t seed) +{ + netio_pkt_minimal_metadata_t* mmd = NETIO_PKT_MINIMAL_METADATA(pkt); + + NETIO_PKT_DO_EGRESS_CSUM_MM(mmd, pkt, start, length, location, seed); +} + + +/** Return the number of bytes which could be prepended to a packet, using a + * metadata pointer to speed the operation. + * See @ref netio_populate_prepend_buffer() to get a full description of + * prepending. + * + * @param[in,out] mda Pointer to packet's standard metadata. + * @param[in] pkt Packet on which to operate. + */ +static __inline int +NETIO_PKT_PREPEND_AVAIL_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ + return (pkt->__packet.bits.__offset << 6) + + NETIO_PKT_CUSTOM_HEADER_LENGTH_M(mda, pkt); +} + + +/** Return the number of bytes which could be prepended to a packet, using a + * metadata pointer to speed the operation. + * See @ref netio_populate_prepend_buffer() to get a full description of + * prepending. + * @ingroup egress + * + * @param[in,out] mmd Pointer to packet's minimal metadata. + * @param[in] pkt Packet on which to operate. + */ +static __inline int +NETIO_PKT_PREPEND_AVAIL_MM(netio_pkt_minimal_metadata_t* mmd, netio_pkt_t* pkt) +{ + return (pkt->__packet.bits.__offset << 6) + mmd->l2_offset; +} + + +/** Return the number of bytes which could be prepended to a packet. + * See @ref netio_populate_prepend_buffer() to get a full description of + * prepending. + * @ingroup egress + * + * @param[in] pkt Packet on which to operate. + */ +static __inline int +NETIO_PKT_PREPEND_AVAIL(netio_pkt_t* pkt) +{ + if (NETIO_PKT_IS_MINIMAL(pkt)) + { + netio_pkt_minimal_metadata_t* mmd = NETIO_PKT_MINIMAL_METADATA(pkt); + + return NETIO_PKT_PREPEND_AVAIL_MM(mmd, pkt); + } + else + { + netio_pkt_metadata_t* mda = NETIO_PKT_METADATA(pkt); + + return NETIO_PKT_PREPEND_AVAIL_M(mda, pkt); + } +} + + +/** Flush a packet's minimal metadata from the cache, using a metadata pointer + * to speed the operation. + * @ingroup egress + * + * @param[in] mmd Pointer to packet's minimal metadata. + * @param[in] pkt Packet on which to operate. + */ +static __inline void +NETIO_PKT_FLUSH_MINIMAL_METADATA_MM(netio_pkt_minimal_metadata_t* mmd, + netio_pkt_t* pkt) +{ +} + + +/** Invalidate a packet's minimal metadata from the cache, using a metadata + * pointer to speed the operation. + * @ingroup egress + * + * @param[in] mmd Pointer to packet's minimal metadata. + * @param[in] pkt Packet on which to operate. + */ +static __inline void +NETIO_PKT_INV_MINIMAL_METADATA_MM(netio_pkt_minimal_metadata_t* mmd, + netio_pkt_t* pkt) +{ +} + + +/** Flush and then invalidate a packet's minimal metadata from the cache, + * using a metadata pointer to speed the operation. + * @ingroup egress + * + * @param[in] mmd Pointer to packet's minimal metadata. + * @param[in] pkt Packet on which to operate. + */ +static __inline void +NETIO_PKT_FLUSH_INV_MINIMAL_METADATA_MM(netio_pkt_minimal_metadata_t* mmd, + netio_pkt_t* pkt) +{ +} + + +/** Flush a packet's metadata from the cache, using a metadata pointer + * to speed the operation. + * @ingroup ingress + * + * @param[in] mda Pointer to packet's minimal metadata. + * @param[in] pkt Packet on which to operate. + */ +static __inline void +NETIO_PKT_FLUSH_METADATA_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ +} + + +/** Invalidate a packet's metadata from the cache, using a metadata + * pointer to speed the operation. + * @ingroup ingress + * + * @param[in] mda Pointer to packet's metadata. + * @param[in] pkt Packet on which to operate. + */ +static __inline void +NETIO_PKT_INV_METADATA_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ +} + + +/** Flush and then invalidate a packet's metadata from the cache, + * using a metadata pointer to speed the operation. + * @ingroup ingress + * + * @param[in] mda Pointer to packet's metadata. + * @param[in] pkt Packet on which to operate. + */ +static __inline void +NETIO_PKT_FLUSH_INV_METADATA_M(netio_pkt_metadata_t* mda, netio_pkt_t* pkt) +{ +} + + +/** Flush a packet's minimal metadata from the cache. + * @ingroup egress + * + * @param[in] pkt Packet on which to operate. + */ +static __inline void +NETIO_PKT_FLUSH_MINIMAL_METADATA(netio_pkt_t* pkt) +{ +} + + +/** Invalidate a packet's minimal metadata from the cache. + * @ingroup egress + * + * @param[in] pkt Packet on which to operate. + */ +static __inline void +NETIO_PKT_INV_MINIMAL_METADATA(netio_pkt_t* pkt) +{ +} + + +/** Flush and then invalidate a packet's minimal metadata from the cache. + * @ingroup egress + * + * @param[in] pkt Packet on which to operate. + */ +static __inline void +NETIO_PKT_FLUSH_INV_MINIMAL_METADATA(netio_pkt_t* pkt) +{ +} + + +/** Flush a packet's metadata from the cache. + * @ingroup ingress + * + * @param[in] pkt Packet on which to operate. + */ +static __inline void +NETIO_PKT_FLUSH_METADATA(netio_pkt_t* pkt) +{ +} + + +/** Invalidate a packet's metadata from the cache. + * @ingroup ingress + * + * @param[in] pkt Packet on which to operate. + */ +static __inline void +NETIO_PKT_INV_METADATA(netio_pkt_t* pkt) +{ +} + + +/** Flush and then invalidate a packet's metadata from the cache. + * @ingroup ingress + * + * @param[in] pkt Packet on which to operate. + */ +static __inline void +NETIO_PKT_FLUSH_INV_METADATA(netio_pkt_t* pkt) +{ +} + +/** Number of NUMA nodes we can distribute buffers to. + * @ingroup setup */ +#define NETIO_NUM_NODE_WEIGHTS 16 + +/** + * @brief An object for specifying the characteristics of NetIO communication + * endpoint. + * + * @ingroup setup + * + * The @ref netio_input_register() function uses this structure to define + * how an application tile will communicate with an IPP. + * + * + * Future updates to NetIO may add new members to this structure, + * which can affect the success of the registration operation. Thus, + * if dynamically initializing the structure, applications are urged to + * zero it out first, for example: + * + * @code + * netio_input_config_t config; + * memset(&config, 0, sizeof (config)); + * config.flags = NETIO_RECV | NETIO_XMIT_CSUM | NETIO_TAG_NONE; + * config.num_receive_packets = NETIO_MAX_RECEIVE_PKTS; + * config.queue_id = 0; + * . + * . + * . + * @endcode + * + * since that guarantees that any unused structure members, including + * members which did not exist when the application was first developed, + * will not have unexpected values. + * + * If statically initializing the structure, we strongly recommend use of + * C99-style named initializers, for example: + * + * @code + * netio_input_config_t config = { + * .flags = NETIO_RECV | NETIO_XMIT_CSUM | NETIO_TAG_NONE, + * .num_receive_packets = NETIO_MAX_RECEIVE_PKTS, + * .queue_id = 0, + * }, + * @endcode + * + * instead of the old-style structure initialization: + * + * @code + * // Bad example! Currently equivalent to the above, but don't do this. + * netio_input_config_t config = { + * NETIO_RECV | NETIO_XMIT_CSUM | NETIO_TAG_NONE, NETIO_MAX_RECEIVE_PKTS, 0 + * }, + * @endcode + * + * since the C99 style requires no changes to the code if elements of the + * config structure are rearranged. (It also makes the initialization much + * easier to understand.) + * + * Except for items which address a particular tile's transmit or receive + * characteristics, such as the ::NETIO_RECV flag, applications are advised + * to specify the same set of configuration data on all registrations. + * This prevents differing results if multiple tiles happen to do their + * registration operations in a different order on different invocations of + * the application. This is particularly important for things like link + * management flags, and buffer size and homing specifications. + * + * Unless the ::NETIO_FIXED_BUFFER_VA flag is specified in flags, the NetIO + * buffer pool is automatically created and mapped into the application's + * virtual address space at an address chosen by the operating system, + * using the common memory (cmem) facility in the Tilera Multicore + * Components library. The cmem facility allows multiple processes to gain + * access to shared memory which is mapped into each process at an + * identical virtual address. In order for this to work, the processes + * must have a common ancestor, which must create the common memory using + * tmc_cmem_init(). + * + * In programs using the iLib process creation API, or in programs which use + * only one process (which include programs using the pthreads library), + * tmc_cmem_init() is called automatically. All other applications + * must call it explicitly, before any child processes which might call + * netio_input_register() are created. + */ +typedef struct +{ + /** Registration characteristics. + + This value determines several characteristics of the registration; + flags for different types of behavior are ORed together to make the + final flag value. Generally applications should specify exactly + one flag from each of the following categories: + + - Whether the application will be receiving packets on this queue + (::NETIO_RECV or ::NETIO_NO_RECV). + + - Whether the application will be transmitting packets on this queue, + and if so, whether it will request egress checksum calculation + (::NETIO_XMIT, ::NETIO_XMIT_CSUM, or ::NETIO_NO_XMIT). It is + legal to call netio_get_buffer() without one of the XMIT flags, + as long as ::NETIO_RECV is specified; in this case, the retrieved + buffers must be passed to another tile for transmission. + + - Whether the application expects any vendor-specific tags in + its packets' L2 headers (::NETIO_TAG_NONE, ::NETIO_TAG_BRCM, + or ::NETIO_TAG_MRVL). This must match the configuration of the + target IPP. + + To accommodate applications written to previous versions of the NetIO + interface, none of the flags above are currently required; if omitted, + NetIO behaves more or less as if ::NETIO_RECV | ::NETIO_XMIT_CSUM | + ::NETIO_TAG_NONE were used. However, explicit specification of + the relevant flags allows NetIO to do a better job of resource + allocation, allows earlier detection of certain configuration errors, + and may enable advanced features or higher performance in the future, + so their use is strongly recommended. + + Note that specifying ::NETIO_NO_RECV along with ::NETIO_NO_XMIT + is a special case, intended primarily for use by programs which + retrieve network statistics or do link management operations. + When these flags are both specified, the resulting queue may not + be used with NetIO routines other than netio_get(), netio_set(), + and netio_input_unregister(). See @ref link for more information + on link management. + + Other flags are optional; their use is described below. + */ + int flags; + + /** Interface name. This is a string which identifies the specific + Ethernet controller hardware to be used. The format of the string + is a device type and a device index, separated by a slash; so, + the first 10 Gigabit Ethernet controller is named "xgbe/0", while + the second 10/100/1000 Megabit Ethernet controller is named "gbe/1". + */ + const char* interface; + + /** Receive packet queue size. This specifies the maximum number + of ingress packets that can be received on this queue without + being retrieved by @ref netio_get_packet(). If the IPP's distribution + algorithm calls for a packet to be sent to this queue, and this + number of packets are already pending there, the new packet + will either be discarded, or sent to another tile registered + for the same queue_id (see @ref drops). This value must + be at least ::NETIO_MIN_RECEIVE_PKTS, can always be at least + ::NETIO_MAX_RECEIVE_PKTS, and may be larger than that on certain + interfaces. + */ + int num_receive_packets; + + /** The queue ID being requested. Legal values for this range from 0 + to ::NETIO_MAX_QUEUE_ID, inclusive. ::NETIO_MAX_QUEUE_ID is always + greater than or equal to the number of tiles; this allows one queue + for each tile, plus at least one additional queue. Some applications + may wish to use the additional queue as a destination for unwanted + packets, since packets delivered to queues for which no tiles have + registered are discarded. + */ + unsigned int queue_id; + + /** Maximum number of small send buffers to be held in the local empty + buffer cache. This specifies the size of the area which holds + empty small egress buffers requested from the IPP but not yet + retrieved via @ref netio_get_buffer(). This value must be greater + than zero if the application will ever use @ref netio_get_buffer() + to allocate empty small egress buffers; it may be no larger than + ::NETIO_MAX_SEND_BUFFERS. See @ref epp for more details on empty + buffer caching. + */ + int num_send_buffers_small_total; + + /** Number of small send buffers to be preallocated at registration. + If this value is nonzero, the specified number of empty small egress + buffers will be requested from the IPP during the netio_input_register + operation; this may speed the execution of @ref netio_get_buffer(). + This may be no larger than @ref num_send_buffers_small_total. See @ref + epp for more details on empty buffer caching. + */ + int num_send_buffers_small_prealloc; + + /** Maximum number of large send buffers to be held in the local empty + buffer cache. This specifies the size of the area which holds empty + large egress buffers requested from the IPP but not yet retrieved via + @ref netio_get_buffer(). This value must be greater than zero if the + application will ever use @ref netio_get_buffer() to allocate empty + large egress buffers; it may be no larger than ::NETIO_MAX_SEND_BUFFERS. + See @ref epp for more details on empty buffer caching. + */ + int num_send_buffers_large_total; + + /** Number of large send buffers to be preallocated at registration. + If this value is nonzero, the specified number of empty large egress + buffers will be requested from the IPP during the netio_input_register + operation; this may speed the execution of @ref netio_get_buffer(). + This may be no larger than @ref num_send_buffers_large_total. See @ref + epp for more details on empty buffer caching. + */ + int num_send_buffers_large_prealloc; + + /** Maximum number of jumbo send buffers to be held in the local empty + buffer cache. This specifies the size of the area which holds empty + jumbo egress buffers requested from the IPP but not yet retrieved via + @ref netio_get_buffer(). This value must be greater than zero if the + application will ever use @ref netio_get_buffer() to allocate empty + jumbo egress buffers; it may be no larger than ::NETIO_MAX_SEND_BUFFERS. + See @ref epp for more details on empty buffer caching. + */ + int num_send_buffers_jumbo_total; + + /** Number of jumbo send buffers to be preallocated at registration. + If this value is nonzero, the specified number of empty jumbo egress + buffers will be requested from the IPP during the netio_input_register + operation; this may speed the execution of @ref netio_get_buffer(). + This may be no larger than @ref num_send_buffers_jumbo_total. See @ref + epp for more details on empty buffer caching. + */ + int num_send_buffers_jumbo_prealloc; + + /** Total packet buffer size. This determines the total size, in bytes, + of the NetIO buffer pool. Note that the maximum number of available + buffers of each size is determined during hypervisor configuration + (see the <em>System Programmer's Guide</em> for details); this just + influences how much host memory is allocated for those buffers. + + The buffer pool is allocated from common memory, which will be + automatically initialized if needed. If your buffer pool is larger + than 240 MB, you might need to explicitly call @c tmc_cmem_init(), + as described in the Application Libraries Reference Manual (UG227). + + Packet buffers are currently allocated in chunks of 16 MB; this + value will be rounded up to the next larger multiple of 16 MB. + If this value is zero, a default of 32 MB will be used; this was + the value used by previous versions of NetIO. Note that taking this + default also affects the placement of buffers on Linux NUMA nodes. + See @ref buffer_node_weights for an explanation of buffer placement. + + In order to successfully allocate packet buffers, Linux must have + available huge pages on the relevant Linux NUMA nodes. See the + <em>System Programmer's Guide</em> for information on configuring + huge page support in Linux. + */ + uint64_t total_buffer_size; + + /** Buffer placement weighting factors. + + This array specifies the relative amount of buffering to place + on each of the available Linux NUMA nodes. This array is + indexed by the NUMA node, and the values in the array are + proportional to the amount of buffer space to allocate on that + node. + + If memory striping is enabled in the Hypervisor, then there is + only one logical NUMA node (node 0). In that case, NetIO will by + default ignore the suggested buffer node weights, and buffers + will be striped across the physical memory controllers. See + UG209 System Programmer's Guide for a description of the + hypervisor option that controls memory striping. + + If memory striping is disabled, then there are up to four NUMA + nodes, corresponding to the four DDRAM controllers in the TILE + processor architecture. See UG100 Tile Processor Architecture + Overview for a diagram showing the location of each of the DDRAM + controllers relative to the tile array. + + For instance, if memory striping is disabled, the following + configuration strucure: + + @code + netio_input_config_t config = { + . + . + . + .total_buffer_size = 4 * 16 * 1024 * 1024; + .buffer_node_weights = { 1, 0, 1, 0 }, + }, + @endcode + + would result in 32 MB of buffers being placed on controller 0, and + 32 MB on controller 2. (Since buffers are allocated in units of + 16 MB, some sets of weights will not be able to be matched exactly.) + + For the weights to be effective, @ref total_buffer_size must be + nonzero. If @ref total_buffer_size is zero, causing the default + 32 MB of buffer space to be used, then any specified weights will + be ignored, and buffers will positioned as they were in previous + versions of NetIO: + + - For xgbe/0 and gbe/0, 16 MB of buffers will be placed on controller 1, + and the other 16 MB will be placed on controller 2. + + - For xgbe/1 and gbe/1, 16 MB of buffers will be placed on controller 2, + and the other 16 MB will be placed on controller 3. + + If @ref total_buffer_size is nonzero, but all weights are zero, + then all buffer space will be allocated on Linux NUMA node zero. + + By default, the specified buffer placement is treated as a hint; + if sufficient free memory is not available on the specified + controllers, the buffers will be allocated elsewhere. However, + if the ::NETIO_STRICT_HOMING flag is specified in @ref flags, then a + failure to allocate buffer space exactly as requested will cause the + registration operation to fail with an error of ::NETIO_CANNOT_HOME. + + Note that maximal network performance cannot be achieved with + only one memory controller. + */ + uint8_t buffer_node_weights[NETIO_NUM_NODE_WEIGHTS]; + + /** Fixed virtual address for packet buffers. Only valid when + ::NETIO_FIXED_BUFFER_VA is specified in @ref flags; see the + description of that flag for details. + */ + void* fixed_buffer_va; + + /** + Maximum number of outstanding send packet requests. This value is + only relevant when an EPP is in use; it determines the number of + slots in the EPP's outgoing packet queue which this tile is allowed + to consume, and thus the number of packets which may be sent before + the sending tile must wait for an acknowledgment from the EPP. + Modifying this value is generally only helpful when using @ref + netio_send_packet_vector(), where it can help improve performance by + allowing a single vector send operation to process more packets. + Typically it is not specified, and the default, which divides the + outgoing packet slots evenly between all tiles on the chip, is used. + + If a registration asks for more outgoing packet queue slots than are + available, ::NETIO_TOOMANY_XMIT will be returned. The total number + of packet queue slots which are available for all tiles for each EPP + is subject to change, but is currently ::NETIO_TOTAL_SENDS_OUTSTANDING. + + + This value is ignored if ::NETIO_XMIT is not specified in flags. + If you want to specify a large value here for a specific tile, you are + advised to specify NETIO_NO_XMIT on other, non-transmitting tiles so + that they do not consume a default number of packet slots. Any tile + transmitting is required to have at least ::NETIO_MIN_SENDS_OUTSTANDING + slots allocated to it; values less than that will be silently + increased by the NetIO library. + */ + int num_sends_outstanding; +} +netio_input_config_t; + + +/** Registration flags; used in the @ref netio_input_config_t structure. + * @addtogroup setup + */ +/** @{ */ + +/** Fail a registration request if we can't put packet buffers + on the specified memory controllers. */ +#define NETIO_STRICT_HOMING 0x00000002 + +/** This application expects no tags on its L2 headers. */ +#define NETIO_TAG_NONE 0x00000004 + +/** This application expects Marvell extended tags on its L2 headers. */ +#define NETIO_TAG_MRVL 0x00000008 + +/** This application expects Broadcom tags on its L2 headers. */ +#define NETIO_TAG_BRCM 0x00000010 + +/** This registration may call routines which receive packets. */ +#define NETIO_RECV 0x00000020 + +/** This registration may not call routines which receive packets. */ +#define NETIO_NO_RECV 0x00000040 + +/** This registration may call routines which transmit packets. */ +#define NETIO_XMIT 0x00000080 + +/** This registration may call routines which transmit packets with + checksum acceleration. */ +#define NETIO_XMIT_CSUM 0x00000100 + +/** This registration may not call routines which transmit packets. */ +#define NETIO_NO_XMIT 0x00000200 + +/** This registration wants NetIO buffers mapped at an application-specified + virtual address. + + NetIO buffers are by default created by the TMC common memory facility, + which must be configured by a common ancestor of all processes sharing + a network interface. When this flag is specified, NetIO buffers are + instead mapped at an address chosen by the application (and specified + in @ref netio_input_config_t::fixed_buffer_va). This allows multiple + unrelated but cooperating processes to share a NetIO interface. + All processes sharing the same interface must specify this flag, + and all must specify the same fixed virtual address. + + @ref netio_input_config_t::fixed_buffer_va must be a + multiple of 16 MB, and the packet buffers will occupy @ref + netio_input_config_t::total_buffer_size bytes of virtual address + space, beginning at that address. If any of those virtual addresses + are currently occupied by other memory objects, like application or + shared library code or data, @ref netio_input_register() will return + ::NETIO_FAULT. While it is impossible to provide a fixed_buffer_va + which will work for all applications, a good first guess might be to + use 0xb0000000 minus @ref netio_input_config_t::total_buffer_size. + If that fails, it might be helpful to consult the running application's + virtual address description file (/proc/<em>pid</em>/maps) to see + which regions of virtual address space are available. + */ +#define NETIO_FIXED_BUFFER_VA 0x00000400 + +/** This registration call will not complete unless the network link + is up. The process will wait several seconds for this to happen (the + precise interval is link-dependent), but if the link does not come up, + ::NETIO_LINK_DOWN will be returned. This flag is the default if + ::NETIO_NOREQUIRE_LINK_UP is not specified. Note that this flag by + itself does not request that the link be brought up; that can be done + with the ::NETIO_AUTO_LINK_UPDN or ::NETIO_AUTO_LINK_UP flags (the + latter is the default if no NETIO_AUTO_LINK_xxx flags are specified), + or by explicitly setting the link's desired state via netio_set(). + If the link is not brought up by one of those methods, and this flag + is specified, the registration operation will return ::NETIO_LINK_DOWN. + This flag is ignored if it is specified along with ::NETIO_NO_XMIT and + ::NETIO_NO_RECV. See @ref link for more information on link + management. + */ +#define NETIO_REQUIRE_LINK_UP 0x00000800 + +/** This registration call will complete even if the network link is not up. + Whenever the link is not up, packets will not be sent or received: + netio_get_packet() will return ::NETIO_NOPKT once all queued packets + have been drained, and netio_send_packet() and similar routines will + return NETIO_QUEUE_FULL once the outgoing packet queue in the EPP + or the I/O shim is full. See @ref link for more information on link + management. + */ +#define NETIO_NOREQUIRE_LINK_UP 0x00001000 + +#ifndef __DOXYGEN__ +/* + * These are part of the implementation of the NETIO_AUTO_LINK_xxx flags, + * but should not be used directly by applications, and are thus not + * documented. + */ +#define _NETIO_AUTO_UP 0x00002000 +#define _NETIO_AUTO_DN 0x00004000 +#define _NETIO_AUTO_PRESENT 0x00008000 +#endif + +/** Set the desired state of the link to up, allowing any speeds which are + supported by the link hardware, as part of this registration operation. + Do not take down the link automatically. This is the default if + no other NETIO_AUTO_LINK_xxx flags are specified. This flag is ignored + if it is specified along with ::NETIO_NO_XMIT and ::NETIO_NO_RECV. + See @ref link for more information on link management. + */ +#define NETIO_AUTO_LINK_UP (_NETIO_AUTO_PRESENT | _NETIO_AUTO_UP) + +/** Set the desired state of the link to up, allowing any speeds which are + supported by the link hardware, as part of this registration operation. + Set the desired state of the link to down the next time no tiles are + registered for packet reception or transmission. This flag is ignored + if it is specified along with ::NETIO_NO_XMIT and ::NETIO_NO_RECV. + See @ref link for more information on link management. + */ +#define NETIO_AUTO_LINK_UPDN (_NETIO_AUTO_PRESENT | _NETIO_AUTO_UP | \ + _NETIO_AUTO_DN) + +/** Set the desired state of the link to down the next time no tiles are + registered for packet reception or transmission. This flag is ignored + if it is specified along with ::NETIO_NO_XMIT and ::NETIO_NO_RECV. + See @ref link for more information on link management. + */ +#define NETIO_AUTO_LINK_DN (_NETIO_AUTO_PRESENT | _NETIO_AUTO_DN) + +/** Do not bring up the link automatically as part of this registration + operation. Do not take down the link automatically. This flag + is ignored if it is specified along with ::NETIO_NO_XMIT and + ::NETIO_NO_RECV. See @ref link for more information on link management. + */ +#define NETIO_AUTO_LINK_NONE _NETIO_AUTO_PRESENT + + +/** Minimum number of receive packets. */ +#define NETIO_MIN_RECEIVE_PKTS 16 + +/** Lower bound on the maximum number of receive packets; may be higher + than this on some interfaces. */ +#define NETIO_MAX_RECEIVE_PKTS 128 + +/** Maximum number of send buffers, per packet size. */ +#define NETIO_MAX_SEND_BUFFERS 16 + +/** Number of EPP queue slots, and thus outstanding sends, per EPP. */ +#define NETIO_TOTAL_SENDS_OUTSTANDING 2015 + +/** Minimum number of EPP queue slots, and thus outstanding sends, per + * transmitting tile. */ +#define NETIO_MIN_SENDS_OUTSTANDING 16 + + +/**@}*/ + +#ifndef __DOXYGEN__ + +/** + * An object for providing Ethernet packets to a process. + */ +struct __netio_queue_impl_t; + +/** + * An object for managing the user end of a NetIO queue. + */ +struct __netio_queue_user_impl_t; + +#endif /* !__DOXYGEN__ */ + + +/** A netio_queue_t describes a NetIO communications endpoint. + * @ingroup setup + */ +typedef struct +{ +#ifdef __DOXYGEN__ + uint8_t opaque[8]; /**< This is an opaque structure. */ +#else + struct __netio_queue_impl_t* __system_part; /**< The system part. */ + struct __netio_queue_user_impl_t* __user_part; /**< The user part. */ +#ifdef _NETIO_PTHREAD + _netio_percpu_mutex_t lock; /**< Queue lock. */ +#endif +#endif +} +netio_queue_t; + + +/** + * @brief Packet send context. + * + * @ingroup egress + * + * Packet send context for use with netio_send_packet_prepare and _commit. + */ +typedef struct +{ +#ifdef __DOXYGEN__ + uint8_t opaque[44]; /**< This is an opaque structure. */ +#else + uint8_t flags; /**< Defined below */ + uint8_t datalen; /**< Number of valid words pointed to by data. */ + uint32_t request[9]; /**< Request to be sent to the EPP or shim. Note + that this is smaller than the 11-word maximum + request size, since some constant values are + not saved in the context. */ + uint32_t *data; /**< Data to be sent to the EPP or shim via IDN. */ +#endif +} +netio_send_pkt_context_t; + + +#ifndef __DOXYGEN__ +#define SEND_PKT_CTX_USE_EPP 1 /**< We're sending to an EPP. */ +#define SEND_PKT_CTX_SEND_CSUM 2 /**< Request includes a checksum. */ +#endif + +/** + * @brief Packet vector entry. + * + * @ingroup egress + * + * This data structure is used with netio_send_packet_vector() to send multiple + * packets with one NetIO call. The structure should be initialized by + * calling netio_pkt_vector_set(), rather than by setting the fields + * directly. + * + * This structure is guaranteed to be a power of two in size, no + * bigger than one L2 cache line, and to be aligned modulo its size. + */ +typedef struct +#ifndef __DOXYGEN__ +__attribute__((aligned(8))) +#endif +{ + /** Reserved for use by the user application. When initialized with + * the netio_set_pkt_vector_entry() function, this field is guaranteed + * to be visible to readers only after all other fields are already + * visible. This way it can be used as a valid flag or generation + * counter. */ + uint8_t user_data; + + /* Structure members below this point should not be accessed directly by + * applications, as they may change in the future. */ + + /** Low 8 bits of the packet address to send. The high bits are + * acquired from the 'handle' field. */ + uint8_t buffer_address_low; + + /** Number of bytes to transmit. */ + uint16_t size; + + /** The raw handle from a netio_pkt_t. If this is NETIO_PKT_HANDLE_NONE, + * this vector entry will be skipped and no packet will be transmitted. */ + netio_pkt_handle_t handle; +} +netio_pkt_vector_entry_t; + + +/** + * @brief Initialize fields in a packet vector entry. + * + * @ingroup egress + * + * @param[out] v Pointer to the vector entry to be initialized. + * @param[in] pkt Packet to be transmitted when the vector entry is passed to + * netio_send_packet_vector(). Note that the packet's attributes + * (e.g., its L2 offset and length) are captured at the time this + * routine is called; subsequent changes in those attributes will not + * be reflected in the packet which is actually transmitted. + * Changes in the packet's contents, however, will be so reflected. + * If this is NULL, no packet will be transmitted. + * @param[in] user_data User data to be set in the vector entry. + * This function guarantees that the "user_data" field will become + * visible to a reader only after all other fields have become visible. + * This allows a structure in a ring buffer to be written and read + * by a polling reader without any locks or other synchronization. + */ +static __inline void +netio_pkt_vector_set(volatile netio_pkt_vector_entry_t* v, netio_pkt_t* pkt, + uint8_t user_data) +{ + if (pkt) + { + if (NETIO_PKT_IS_MINIMAL(pkt)) + { + netio_pkt_minimal_metadata_t* mmd = + (netio_pkt_minimal_metadata_t*) &pkt->__metadata; + v->buffer_address_low = (uintptr_t) NETIO_PKT_L2_DATA_MM(mmd, pkt) & 0xFF; + v->size = NETIO_PKT_L2_LENGTH_MM(mmd, pkt); + } + else + { + netio_pkt_metadata_t* mda = &pkt->__metadata; + v->buffer_address_low = (uintptr_t) NETIO_PKT_L2_DATA_M(mda, pkt) & 0xFF; + v->size = NETIO_PKT_L2_LENGTH_M(mda, pkt); + } + v->handle.word = pkt->__packet.word; + } + else + { + v->handle.word = 0; /* Set handle to NETIO_PKT_HANDLE_NONE. */ + } + + __asm__("" : : : "memory"); + + v->user_data = user_data; +} + + +/** + * Flags and structures for @ref netio_get() and @ref netio_set(). + * @ingroup config + */ + +/** @{ */ +/** Parameter class; addr is a NETIO_PARAM_xxx value. */ +#define NETIO_PARAM 0 +/** Interface MAC address. This address is only valid with @ref netio_get(). + * The value is a 6-byte MAC address. Depending upon the overall system + * design, a MAC address may or may not be available for each interface. */ +#define NETIO_PARAM_MAC 0 + +/** Determine whether to suspend output on the receipt of pause frames. + * If the value is nonzero, the I/O shim will suspend output when a pause + * frame is received. If the value is zero, pause frames will be ignored. */ +#define NETIO_PARAM_PAUSE_IN 1 + +/** Determine whether to send pause frames if the I/O shim packet FIFOs are + * nearly full. If the value is zero, pause frames are not sent. If + * the value is nonzero, it is the delay value which will be sent in any + * pause frames which are output, in units of 512 bit times. */ +#define NETIO_PARAM_PAUSE_OUT 2 + +/** Jumbo frame support. The value is a 4-byte integer. If the value is + * nonzero, the MAC will accept frames of up to 10240 bytes. If the value + * is zero, the MAC will only accept frames of up to 1544 bytes. */ +#define NETIO_PARAM_JUMBO 3 + +/** I/O shim's overflow statistics register. The value is two 16-bit integers. + * The first 16-bit value (or the low 16 bits, if the value is treated as a + * 32-bit number) is the count of packets which were completely dropped and + * not delivered by the shim. The second 16-bit value (or the high 16 bits, + * if the value is treated as a 32-bit number) is the count of packets + * which were truncated and thus only partially delivered by the shim. This + * register is automatically reset to zero after it has been read. + */ +#define NETIO_PARAM_OVERFLOW 4 + +/** IPP statistics. This address is only valid with @ref netio_get(). The + * value is a netio_stat_t structure. Unlike the I/O shim statistics, the + * IPP statistics are not all reset to zero on read; see the description + * of the netio_stat_t for details. */ +#define NETIO_PARAM_STAT 5 + +/** Possible link state. The value is a combination of "NETIO_LINK_xxx" + * flags. With @ref netio_get(), this will indicate which flags are + * actually supported by the hardware. + * + * For historical reasons, specifying this value to netio_set() will have + * the same behavior as using ::NETIO_PARAM_LINK_CONFIG, but this usage is + * discouraged. + */ +#define NETIO_PARAM_LINK_POSSIBLE_STATE 6 + +/** Link configuration. The value is a combination of "NETIO_LINK_xxx" flags. + * With @ref netio_set(), this will attempt to immediately bring up the + * link using whichever of the requested flags are supported by the + * hardware, or take down the link if the flags are zero; if this is + * not possible, an error will be returned. Many programs will want + * to use ::NETIO_PARAM_LINK_DESIRED_STATE instead. + * + * For historical reasons, specifying this value to netio_get() will + * have the same behavior as using ::NETIO_PARAM_LINK_POSSIBLE_STATE, + * but this usage is discouraged. + */ +#define NETIO_PARAM_LINK_CONFIG NETIO_PARAM_LINK_POSSIBLE_STATE + +/** Current link state. This address is only valid with @ref netio_get(). + * The value is zero or more of the "NETIO_LINK_xxx" flags, ORed together. + * If the link is down, the value ANDed with NETIO_LINK_SPEED will be + * zero; if the link is up, the value ANDed with NETIO_LINK_SPEED will + * result in exactly one of the NETIO_LINK_xxx values, indicating the + * current speed. */ +#define NETIO_PARAM_LINK_CURRENT_STATE 7 + +/** Variant symbol for current state, retained for compatibility with + * pre-MDE-2.1 programs. */ +#define NETIO_PARAM_LINK_STATUS NETIO_PARAM_LINK_CURRENT_STATE + +/** Packet Coherence protocol. This address is only valid with @ref netio_get(). + * The value is nonzero if the interface is configured for cache-coherent DMA. + */ +#define NETIO_PARAM_COHERENT 8 + +/** Desired link state. The value is a conbination of "NETIO_LINK_xxx" + * flags, which specify the desired state for the link. With @ref + * netio_set(), this will, in the background, attempt to bring up the link + * using whichever of the requested flags are reasonable, or take down the + * link if the flags are zero. The actual link up or down operation may + * happen after this call completes. If the link state changes in the + * future, the system will continue to try to get back to the desired link + * state; for instance, if the link is brought up successfully, and then + * the network cable is disconnected, the link will go down. However, the + * desired state of the link is still up, so if the cable is reconnected, + * the link will be brought up again. + * + * With @ref netio_get(), this will indicate the desired state for the + * link, as set with a previous netio_set() call, or implicitly by a + * netio_input_register() or netio_input_unregister() operation. This may + * not reflect the current state of the link; to get that, use + * ::NETIO_PARAM_LINK_CURRENT_STATE. */ +#define NETIO_PARAM_LINK_DESIRED_STATE 9 + +/** NetIO statistics structure. Retrieved using the ::NETIO_PARAM_STAT + * address passed to @ref netio_get(). */ +typedef struct +{ + /** Number of packets which have been received by the IPP and forwarded + * to a tile's receive queue for processing. This value wraps at its + * maximum, and is not cleared upon read. */ + uint32_t packets_received; + + /** Number of packets which have been dropped by the IPP, because they could + * not be received, or could not be forwarded to a tile. The former happens + * when the IPP does not have a free packet buffer of suitable size for an + * incoming frame. The latter happens when all potential destination tiles + * for a packet, as defined by the group, bucket, and queue configuration, + * have full receive queues. This value wraps at its maximum, and is not + * cleared upon read. */ + uint32_t packets_dropped; + + /* + * Note: the #defines after each of the following four one-byte values + * denote their location within the third word of the netio_stat_t. They + * are intended for use only by the IPP implementation and are thus omitted + * from the Doxygen output. + */ + + /** Number of packets dropped because no worker was able to accept a new + * packet. This value saturates at its maximum, and is cleared upon + * read. */ + uint8_t drops_no_worker; +#ifndef __DOXYGEN__ +#define NETIO_STAT_DROPS_NO_WORKER 0 +#endif + + /** Number of packets dropped because no small buffers were available. + * This value saturates at its maximum, and is cleared upon read. */ + uint8_t drops_no_smallbuf; +#ifndef __DOXYGEN__ +#define NETIO_STAT_DROPS_NO_SMALLBUF 1 +#endif + + /** Number of packets dropped because no large buffers were available. + * This value saturates at its maximum, and is cleared upon read. */ + uint8_t drops_no_largebuf; +#ifndef __DOXYGEN__ +#define NETIO_STAT_DROPS_NO_LARGEBUF 2 +#endif + + /** Number of packets dropped because no jumbo buffers were available. + * This value saturates at its maximum, and is cleared upon read. */ + uint8_t drops_no_jumbobuf; +#ifndef __DOXYGEN__ +#define NETIO_STAT_DROPS_NO_JUMBOBUF 3 +#endif +} +netio_stat_t; + + +/** Link can run, should run, or is running at 10 Mbps. */ +#define NETIO_LINK_10M 0x01 + +/** Link can run, should run, or is running at 100 Mbps. */ +#define NETIO_LINK_100M 0x02 + +/** Link can run, should run, or is running at 1 Gbps. */ +#define NETIO_LINK_1G 0x04 + +/** Link can run, should run, or is running at 10 Gbps. */ +#define NETIO_LINK_10G 0x08 + +/** Link should run at the highest speed supported by the link and by + * the device connected to the link. Only usable as a value for + * the link's desired state; never returned as a value for the current + * or possible states. */ +#define NETIO_LINK_ANYSPEED 0x10 + +/** All legal link speeds. */ +#define NETIO_LINK_SPEED (NETIO_LINK_10M | \ + NETIO_LINK_100M | \ + NETIO_LINK_1G | \ + NETIO_LINK_10G | \ + NETIO_LINK_ANYSPEED) + + +/** MAC register class. Addr is a register offset within the MAC. + * Registers within the XGbE and GbE MACs are documented in the Tile + * Processor I/O Device Guide (UG104). MAC registers start at address + * 0x4000, and do not include the MAC_INTERFACE registers. */ +#define NETIO_MAC 1 + +/** MDIO register class (IEEE 802.3 clause 22 format). Addr is the "addr" + * member of a netio_mdio_addr_t structure. */ +#define NETIO_MDIO 2 + +/** MDIO register class (IEEE 802.3 clause 45 format). Addr is the "addr" + * member of a netio_mdio_addr_t structure. */ +#define NETIO_MDIO_CLAUSE45 3 + +/** NetIO MDIO address type. Retrieved or provided using the ::NETIO_MDIO + * address passed to @ref netio_get() or @ref netio_set(). */ +typedef union +{ + struct + { + unsigned int reg:16; /**< MDIO register offset. For clause 22 access, + must be less than 32. */ + unsigned int phy:5; /**< Which MDIO PHY to access. */ + unsigned int dev:5; /**< Which MDIO device to access within that PHY. + Applicable for clause 45 access only; ignored + for clause 22 access. */ + } + bits; /**< Container for bitfields. */ + uint64_t addr; /**< Value to pass to @ref netio_get() or + * @ref netio_set(). */ +} +netio_mdio_addr_t; + +/** @} */ + +#endif /* __NETIO_INTF_H__ */ |