169 lines
3.4 KiB
C
169 lines
3.4 KiB
C
#ifndef _GPXE_INFINIBAND_H
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#define _GPXE_INFINIBAND_H
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/** @file
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*
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* Infiniband protocol
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*
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*/
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#include <stdint.h>
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#include <gpxe/netdevice.h>
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/** An Infiniband Global Identifier */
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struct ib_gid {
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uint8_t bytes[16];
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};
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/** An Infiniband Global Route Header */
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struct ib_global_route_header {
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/** IP version, traffic class, and flow label
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*
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* 4 bits : Version of the GRH
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* 8 bits : Traffic class
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* 20 bits : Flow label
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*/
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uint32_t ipver_tclass_flowlabel;
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/** Payload length */
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uint16_t paylen;
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/** Next header */
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uint8_t nxthdr;
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/** Hop limit */
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uint8_t hoplmt;
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/** Source GID */
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struct ib_gid sgid;
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/** Destiniation GID */
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struct ib_gid dgid;
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} __attribute__ (( packed ));
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/** Infiniband MAC address length */
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#define IB_ALEN 20
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/** An Infiniband MAC address */
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struct ib_mac {
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/** Queue pair number
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*
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* MSB must be zero; QPNs are only 24-bit.
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*/
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uint32_t qpn;
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/** Port GID */
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struct ib_gid gid;
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} __attribute__ (( packed ));
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/** Infiniband link-layer header length */
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#define IB_HLEN 4
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/** An Infiniband link-layer header */
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struct ibhdr {
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/** Network-layer protocol */
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uint16_t proto;
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/** Reserved, must be zero */
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uint16_t reserved;
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} __attribute__ (( packed ));
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/** An Infiniband Work Queue */
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struct ib_work_queue {
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/** Number of work queue entries */
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unsigned int num_wqes;
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/** Posted index
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*
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* This is the index of the most recently posted entry.
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*/
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unsigned int posted;
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/** I/O buffers assigned to work queue */
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struct io_buffer **iobufs;
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/** Driver private data */
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void *priv;
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};
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/** An Infiniband Queue Pair */
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struct ib_queue_pair {
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/** Queue Pair Number */
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uint32_t qpn;
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/** Send queue */
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struct ib_work_queue send;
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/** Receive queue */
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struct ib_work_queue recv;
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/** Driver private data */
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void *priv;
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};
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/** An Infiniband Address Vector */
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struct ib_address_vector {
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/** Destination Queue Pair */
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unsigned int dest_qp;
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/** Queue key */
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unsigned int qkey;
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/** Destination Local ID */
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unsigned int dlid;
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/** Rate */
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unsigned int rate;
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/** Service level */
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unsigned int sl;
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/** GID is present */
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unsigned int gid_present;
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/** GID */
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struct ib_gid gid;
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};
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struct ib_device;
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/**
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* Infiniband device operations
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*
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* These represent a subset of the Infiniband Verbs.
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*/
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struct ib_device_operations {
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/** Post Send work queue entry
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*
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* @v ibdev Infiniband device
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* @v iobuf I/O buffer
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* @v av Address vector
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* @v qp Queue pair
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* @ret rc Return status code
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*
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* If this method returns success, the I/O buffer remains
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* owned by the queue pair. If this method returns failure,
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* the I/O buffer is immediately released; the failure is
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* interpreted as "failure to enqueue buffer".
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*/
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int ( * post_send ) ( struct ib_device *ibdev,
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struct io_buffer *iobuf,
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struct ib_address_vector *av,
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struct ib_queue_pair *qp );
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};
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/** An Infiniband device */
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struct ib_device {
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/** Driver private data */
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void *priv;
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};
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extern struct ll_protocol infiniband_protocol;
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extern const char * ib_ntoa ( const void *ll_addr );
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/**
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* Allocate Infiniband device
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*
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* @v priv_size Size of driver private data
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* @ret netdev Network device, or NULL
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*/
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static inline struct net_device * alloc_ibdev ( size_t priv_size ) {
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struct net_device *netdev;
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netdev = alloc_netdev ( priv_size );
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if ( netdev ) {
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netdev->ll_protocol = &infiniband_protocol;
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}
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return netdev;
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}
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#endif /* _GPXE_INFINIBAND_H */
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