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[infiniband] Add raw packet parser and constructor

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This can be used with cards that require the driver to construct and
parse packet headers manually.  Headers are optionally handled
out-of-line from the packet payload, since some such cards will split
received headers into a separate ring buffer.
This commit is contained in:
Michael Brown
2008-11-07 08:39:40 +00:00
parent c0ec00f47f
commit 9e5fd8ec59
5 changed files with 423 additions and 36 deletions
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35
src/include/gpxe/ib_packet.h
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@@ -7,6 +7,11 @@
*
*/
struct ib_device;
struct ib_queue_pair;
struct ib_address_vector;
struct io_buffer;
/** Half of an Infiniband Global Identifier */
struct ib_gid_half {
uint8_t bytes[8];
@@ -53,6 +58,9 @@ enum ib_lnh {
/** Default Infiniband LID */
#define IB_LID_NONE 0xffff
/** Test for multicast LID */
#define IB_LID_MULTICAST( lid ) ( ( (lid) >= 0xc000 ) && ( (lid) <= 0xfffe ) )
/** An Infiniband Global Route Header */
struct ib_global_route_header {
/** IP version, traffic class, and flow label
@@ -76,7 +84,6 @@ struct ib_global_route_header {
#define IB_GRH_IPVER_IPv6 0x06
#define IB_GRH_NXTHDR_IBA 0x1b
#define IB_GRH_HOPLMT_MAX 0xff
/** An Infiniband Base Transport Header */
struct ib_base_transport_header {
@@ -111,4 +118,30 @@ struct ib_datagram_extended_transport_header {
uint32_t src_qp;
} __attribute__ (( packed ));
/** All known IB header formats */
union ib_headers {
struct ib_local_route_header lrh;
struct {
struct ib_local_route_header lrh;
struct ib_global_route_header grh;
struct ib_base_transport_header bth;
struct ib_datagram_extended_transport_header deth;
} __attribute__ (( packed )) lrh__grh__bth__deth;
struct {
struct ib_local_route_header lrh;
struct ib_base_transport_header bth;
struct ib_datagram_extended_transport_header deth;
} __attribute__ (( packed )) lrh__bth__deth;
} __attribute__ (( packed ));
/** Maximum size required for IB headers */
#define IB_MAX_HEADER_SIZE sizeof ( union ib_headers )
extern int ib_push ( struct ib_device *ibdev, struct io_buffer *iobuf,
struct ib_queue_pair *qp, size_t payload_len,
const struct ib_address_vector *av );
extern int ib_pull ( struct ib_device *ibdev, struct io_buffer *iobuf,
struct ib_queue_pair **qp, size_t *payload_len,
struct ib_address_vector *av );
#endif /* _GPXE_IB_PACKET_H */