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IB/hfi1: Add support for 16B Management Packets

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16B Management Packets (L4=0x08) replace the BTH and DETH
of normal MAD packet packets with a header containing the
the source and destination queue pair numbers; fields that
were originally retrieved from the BTH/DETH are now populated
from this header as well as from the 16B LRH (e.g. pkey).

16B Management Packets are used as an optimized management
format on 16B fabrics.

These management packets have an opcode of IB_OPCODE_UD_SEND_ONLY,
a fixed 3Byte pad, and a header length of 24Bytes.

The decision as to when we send a management packet is based
upon either the source or destination queue pair number being
0 or 1.

Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Don Hiatt <don.hiatt@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Don Hiatt
2018-05-15 18:28:15 -07:00
committed by Jason Gunthorpe
parent 4171a693a5
commit 81cd3891f0
4 changed files with 110 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
drivers/infiniband/hw/hfi1/verbs.c
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@@ -617,7 +617,12 @@ static inline void hfi1_handle_packet(struct hfi1_packet *packet,
wake_up(&mcast->wait);
} else {
/* Get the destination QP number. */
qp_num = ib_bth_get_qpn(packet->ohdr);
if (packet->etype == RHF_RCV_TYPE_BYPASS &&
hfi1_16B_get_l4(packet->hdr) == OPA_16B_L4_FM)
qp_num = hfi1_16B_get_dest_qpn(packet->mgmt);
else
qp_num = ib_bth_get_qpn(packet->ohdr);
rcu_read_lock();
packet->qp = rvt_lookup_qpn(rdi, &ibp->rvp, qp_num);
if (!packet->qp)
@@ -1308,21 +1313,23 @@ int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
{
struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
struct hfi1_qp_priv *priv = qp->priv;
struct ib_other_headers *ohdr;
struct ib_other_headers *ohdr = NULL;
send_routine sr;
int ret;
u16 pkey;
u32 slid;
u8 l4 = 0;
/* locate the pkey within the headers */
if (ps->s_txreq->phdr.hdr.hdr_type) {
struct hfi1_16b_header *hdr = &ps->s_txreq->phdr.hdr.opah;
u8 l4 = hfi1_16B_get_l4(hdr);
if (l4 == OPA_16B_L4_IB_GLOBAL)
ohdr = &hdr->u.l.oth;
else
l4 = hfi1_16B_get_l4(hdr);
if (l4 == OPA_16B_L4_IB_LOCAL)
ohdr = &hdr->u.oth;
else if (l4 == OPA_16B_L4_IB_GLOBAL)
ohdr = &hdr->u.l.oth;
slid = hfi1_16B_get_slid(hdr);
pkey = hfi1_16B_get_pkey(hdr);
} else {
@@ -1337,7 +1344,11 @@ int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
pkey = ib_bth_get_pkey(ohdr);
}
ps->opcode = ib_bth_get_opcode(ohdr);
if (likely(l4 != OPA_16B_L4_FM))
ps->opcode = ib_bth_get_opcode(ohdr);
else
ps->opcode = IB_OPCODE_UD_SEND_ONLY;
sr = get_send_routine(qp, ps);
ret = egress_pkey_check(dd->pport, slid, pkey,
priv->s_sc, qp->s_pkey_index);