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IB/hfi1: Add support to send 16B bypass packets 

We introduce struct hfi1_opa_header as a union
of ib (9B) and 16B headers.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@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 2017-08-04 13:54:04 -07:00 committed by Doug Ledford
parent 72c07e2b67
commit 30e07416cf
7 changed files with 84 additions and 60 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
drivers/infiniband/hw/hfi1/rc.c
View File

@ -273,9 +273,9 @@ int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
if (IS_ERR(ps->s_txreq)) if (IS_ERR(ps->s_txreq))
goto bail_no_tx; goto bail_no_tx;
ohdr = &ps->s_txreq->phdr.hdr.u.oth; ohdr = &ps->s_txreq->phdr.hdr.ibh.u.oth;
if (rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH) if (rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH)
ohdr = &ps->s_txreq->phdr.hdr.u.l.oth; ohdr = &ps->s_txreq->phdr.hdr.ibh.u.l.oth;
/* Sending responses has higher priority over sending requests. */ /* Sending responses has higher priority over sending requests. */
if ((qp->s_flags & RVT_S_RESP_PENDING) && if ((qp->s_flags & RVT_S_RESP_PENDING) &&
@ -724,7 +724,8 @@ void hfi1_send_rc_ack(struct hfi1_ctxtdata *rcd, struct rvt_qp *qp,
u32 vl, plen; u32 vl, plen;
struct send_context *sc; struct send_context *sc;
struct pio_buf *pbuf; struct pio_buf *pbuf;
struct ib_header hdr; struct hfi1_opa_header opah;
struct ib_header *hdr;
struct ib_other_headers *ohdr; struct ib_other_headers *ohdr;
unsigned long flags; unsigned long flags;
@ -741,16 +742,19 @@ void hfi1_send_rc_ack(struct hfi1_ctxtdata *rcd, struct rvt_qp *qp,
goto queue_ack; goto queue_ack;
/* Construct the header */ /* Construct the header */
opah.hdr_type = 0;
hdr = &opah.ibh;
/* header size in 32-bit words LRH+BTH+AETH = (8+12+4)/4 */ /* header size in 32-bit words LRH+BTH+AETH = (8+12+4)/4 */
hwords = 6; hwords = 6;
if (unlikely(rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH)) { if (unlikely(rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH)) {
hwords += hfi1_make_grh(ibp, &hdr.u.l.grh, hwords += hfi1_make_grh(ibp, &hdr->u.l.grh,
rdma_ah_read_grh(&qp->remote_ah_attr), rdma_ah_read_grh(&qp->remote_ah_attr),
hwords, 0); hwords, 0);
ohdr = &hdr.u.l.oth; ohdr = &hdr->u.l.oth;
lrh0 = HFI1_LRH_GRH; lrh0 = HFI1_LRH_GRH;
} else { } else {
ohdr = &hdr.u.oth; ohdr = &hdr->u.oth;
lrh0 = HFI1_LRH_BTH; lrh0 = HFI1_LRH_BTH;
} }
/* read pkey_index w/o lock (its atomic) */ /* read pkey_index w/o lock (its atomic) */
@ -768,11 +772,11 @@ void hfi1_send_rc_ack(struct hfi1_ctxtdata *rcd, struct rvt_qp *qp,
pbc_flags |= (ib_is_sc5(sc5) << PBC_DC_INFO_SHIFT); pbc_flags |= (ib_is_sc5(sc5) << PBC_DC_INFO_SHIFT);
lrh0 |= (sc5 & 0xf) << 12 | (rdma_ah_get_sl(&qp->remote_ah_attr) lrh0 |= (sc5 & 0xf) << 12 | (rdma_ah_get_sl(&qp->remote_ah_attr)
& 0xf) << 4; & 0xf) << 4;
hdr.lrh[0] = cpu_to_be16(lrh0); hdr->lrh[0] = cpu_to_be16(lrh0);
hdr.lrh[1] = cpu_to_be16(rdma_ah_get_dlid(&qp->remote_ah_attr)); hdr->lrh[1] = cpu_to_be16(rdma_ah_get_dlid(&qp->remote_ah_attr));
hdr.lrh[2] = cpu_to_be16(hwords + SIZE_OF_CRC); hdr->lrh[2] = cpu_to_be16(hwords + SIZE_OF_CRC);
hdr.lrh[3] = cpu_to_be16(ppd->lid | hdr->lrh[3] = cpu_to_be16(ppd->lid |
rdma_ah_get_path_bits(&qp->remote_ah_attr)); rdma_ah_get_path_bits(&qp->remote_ah_attr));
ohdr->bth[0] = cpu_to_be32(bth0); ohdr->bth[0] = cpu_to_be32(bth0);
ohdr->bth[1] = cpu_to_be32(qp->remote_qpn); ohdr->bth[1] = cpu_to_be32(qp->remote_qpn);
ohdr->bth[1] |= cpu_to_be32((!!is_fecn) << IB_BECN_SHIFT); ohdr->bth[1] |= cpu_to_be32((!!is_fecn) << IB_BECN_SHIFT);
@ -799,10 +803,10 @@ void hfi1_send_rc_ack(struct hfi1_ctxtdata *rcd, struct rvt_qp *qp,
} }
trace_ack_output_ibhdr(dd_from_ibdev(qp->ibqp.device), trace_ack_output_ibhdr(dd_from_ibdev(qp->ibqp.device),
&hdr, ib_is_sc5(sc5)); &opah, ib_is_sc5(sc5));
/* write the pbc and data */ /* write the pbc and data */
ppd->dd->pio_inline_send(ppd->dd, pbuf, pbc, &hdr, hwords); ppd->dd->pio_inline_send(ppd->dd, pbuf, pbc, hdr, hwords);
return; return;
@ -985,9 +989,10 @@ static void reset_sending_psn(struct rvt_qp *qp, u32 psn)
/* /*
* This should be called with the QP s_lock held and interrupts disabled. * This should be called with the QP s_lock held and interrupts disabled.
*/ */
void hfi1_rc_send_complete(struct rvt_qp *qp, struct ib_header *hdr) void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah)
{ {
struct ib_other_headers *ohdr; struct ib_other_headers *ohdr;
struct ib_header *hdr = &opah->ibh;
struct rvt_swqe *wqe; struct rvt_swqe *wqe;
u32 opcode; u32 opcode;
u32 psn; u32 psn;

17
drivers/infiniband/hw/hfi1/ruc.c
View File

@ -668,7 +668,8 @@ u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr,
return sizeof(struct ib_grh) / sizeof(u32); return sizeof(struct ib_grh) / sizeof(u32);
} }
#define BTH2_OFFSET (offsetof(struct hfi1_sdma_header, hdr.u.oth.bth[2]) / 4) #define BTH2_OFFSET (offsetof(struct hfi1_sdma_header, \
hdr.ibh.u.oth.bth[2]) / 4)
/** /**
* build_ahg - create ahg in s_ahg * build_ahg - create ahg in s_ahg
@ -743,8 +744,8 @@ void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
if (unlikely(rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH)) { if (unlikely(rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH)) {
qp->s_hdrwords += qp->s_hdrwords +=
hfi1_make_grh(ibp, hfi1_make_grh(ibp,
&ps->s_txreq->phdr.hdr.u.l.grh, &ps->s_txreq->phdr.hdr.ibh.u.l.grh,
rdma_ah_read_grh(&qp->remote_ah_attr), &qp->remote_ah_attr.grh,
qp->s_hdrwords, nwords); qp->s_hdrwords, nwords);
lrh0 = HFI1_LRH_GRH; lrh0 = HFI1_LRH_GRH;
middle = 0; middle = 0;
@ -773,14 +774,14 @@ void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
build_ahg(qp, bth2); build_ahg(qp, bth2);
else else
qp->s_flags &= ~RVT_S_AHG_VALID; qp->s_flags &= ~RVT_S_AHG_VALID;
ps->s_txreq->phdr.hdr.lrh[0] = cpu_to_be16(lrh0); ps->s_txreq->phdr.hdr.ibh.lrh[0] = cpu_to_be16(lrh0);
ps->s_txreq->phdr.hdr.lrh[1] = ps->s_txreq->phdr.hdr.ibh.lrh[1] =
cpu_to_be16(rdma_ah_get_dlid(&qp->remote_ah_attr)); cpu_to_be16(rdma_ah_get_dlid(&qp->remote_ah_attr));
ps->s_txreq->phdr.hdr.lrh[2] = ps->s_txreq->phdr.hdr.ibh.lrh[2] =
cpu_to_be16(qp->s_hdrwords + nwords + SIZE_OF_CRC); cpu_to_be16(qp->s_hdrwords + nwords + SIZE_OF_CRC);
ps->s_txreq->phdr.hdr.lrh[3] = ps->s_txreq->phdr.hdr.ibh.lrh[3] =
cpu_to_be16(ppd_from_ibp(ibp)->lid | cpu_to_be16(ppd_from_ibp(ibp)->lid |
rdma_ah_get_path_bits(&qp->remote_ah_attr)); rdma_ah_get_path_bits(&qp->remote_ah_attr));
bth0 |= hfi1_get_pkey(ibp, qp->s_pkey_index); bth0 |= hfi1_get_pkey(ibp, qp->s_pkey_index);
bth0 |= extra_bytes << 20; bth0 |= extra_bytes << 20;
ohdr->bth[0] = cpu_to_be32(bth0); ohdr->bth[0] = cpu_to_be32(bth0);

19
drivers/infiniband/hw/hfi1/trace_ibhdrs.h
View File

@ -213,9 +213,9 @@ DEFINE_EVENT(hfi1_input_ibhdr_template, input_ibhdr,
DECLARE_EVENT_CLASS(hfi1_output_ibhdr_template, DECLARE_EVENT_CLASS(hfi1_output_ibhdr_template,
TP_PROTO(struct hfi1_devdata *dd, TP_PROTO(struct hfi1_devdata *dd,
struct ib_header *hdr, struct hfi1_opa_header *opah,
bool sc5), bool sc5),
TP_ARGS(dd, hdr, sc5), TP_ARGS(dd, opah, sc5),
TP_STRUCT__entry( TP_STRUCT__entry(
DD_DEV_ENTRY(dd) DD_DEV_ENTRY(dd)
__field(u8, lnh) __field(u8, lnh)
@ -238,10 +238,11 @@ DECLARE_EVENT_CLASS(hfi1_output_ibhdr_template,
__field(u32, psn) __field(u32, psn)
/* extended headers */ /* extended headers */
__dynamic_array(u8, ehdrs, __dynamic_array(u8, ehdrs,
hfi1_trace_ib_hdr_len(hdr)) hfi1_trace_ib_hdr_len(&opah->ibh))
), ),
TP_fast_assign( TP_fast_assign(
struct ib_other_headers *ohdr; struct ib_other_headers *ohdr;
struct ib_header *hdr = &opah->ibh;
DD_DEV_ASSIGN(dd); DD_DEV_ASSIGN(dd);
@ -294,18 +295,18 @@ DECLARE_EVENT_CLASS(hfi1_output_ibhdr_template,
DEFINE_EVENT(hfi1_output_ibhdr_template, pio_output_ibhdr, DEFINE_EVENT(hfi1_output_ibhdr_template, pio_output_ibhdr,
TP_PROTO(struct hfi1_devdata *dd, TP_PROTO(struct hfi1_devdata *dd,
struct ib_header *hdr, bool sc5), struct hfi1_opa_header *opah, bool sc5),
TP_ARGS(dd, hdr, sc5)); TP_ARGS(dd, opah, sc5));
DEFINE_EVENT(hfi1_output_ibhdr_template, ack_output_ibhdr, DEFINE_EVENT(hfi1_output_ibhdr_template, ack_output_ibhdr,
TP_PROTO(struct hfi1_devdata *dd, TP_PROTO(struct hfi1_devdata *dd,
struct ib_header *hdr, bool sc5), struct hfi1_opa_header *opah, bool sc5),
TP_ARGS(dd, hdr, sc5)); TP_ARGS(dd, opah, sc5));
DEFINE_EVENT(hfi1_output_ibhdr_template, sdma_output_ibhdr, DEFINE_EVENT(hfi1_output_ibhdr_template, sdma_output_ibhdr,
TP_PROTO(struct hfi1_devdata *dd, TP_PROTO(struct hfi1_devdata *dd,
struct ib_header *hdr, bool sc5), struct hfi1_opa_header *opah, bool sc5),
TP_ARGS(dd, hdr, sc5)); TP_ARGS(dd, opah, sc5));
#endif /* __HFI1_TRACE_IBHDRS_H */ #endif /* __HFI1_TRACE_IBHDRS_H */

4
drivers/infiniband/hw/hfi1/uc.c
View File

@ -93,9 +93,9 @@ int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
goto done_free_tx; goto done_free_tx;
} }
ohdr = &ps->s_txreq->phdr.hdr.u.oth; ohdr = &ps->s_txreq->phdr.hdr.ibh.u.oth;
if (rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH) if (rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH)
ohdr = &ps->s_txreq->phdr.hdr.u.l.oth; ohdr = &ps->s_txreq->phdr.hdr.ibh.u.l.oth;
/* Get the next send request. */ /* Get the next send request. */
wqe = rvt_get_swqe_ptr(qp, qp->s_cur); wqe = rvt_get_swqe_ptr(qp, qp->s_cur);

25
drivers/infiniband/hw/hfi1/ud.c
View File

@ -357,12 +357,13 @@ int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
if (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) { if (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) {
/* Header size in 32-bit words. */ /* Header size in 32-bit words. */
qp->s_hdrwords += hfi1_make_grh(ibp, qp->s_hdrwords +=
&ps->s_txreq->phdr.hdr.u.l.grh, hfi1_make_grh(ibp,
rdma_ah_read_grh(ah_attr), &ps->s_txreq->phdr.hdr.ibh.u.l.grh,
qp->s_hdrwords, nwords); rdma_ah_read_grh(ah_attr),
qp->s_hdrwords, nwords);
lrh0 = HFI1_LRH_GRH; lrh0 = HFI1_LRH_GRH;
ohdr = &ps->s_txreq->phdr.hdr.u.l.oth; ohdr = &ps->s_txreq->phdr.hdr.ibh.u.l.oth;
/* /*
* Don't worry about sending to locally attached multicast * Don't worry about sending to locally attached multicast
* QPs. It is unspecified by the spec. what happens. * QPs. It is unspecified by the spec. what happens.
@ -370,7 +371,7 @@ int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
} else { } else {
/* Header size in 32-bit words. */ /* Header size in 32-bit words. */
lrh0 = HFI1_LRH_BTH; lrh0 = HFI1_LRH_BTH;
ohdr = &ps->s_txreq->phdr.hdr.u.oth; ohdr = &ps->s_txreq->phdr.hdr.ibh.u.oth;
} }
if (wqe->wr.opcode == IB_WR_SEND_WITH_IMM) { if (wqe->wr.opcode == IB_WR_SEND_WITH_IMM) {
qp->s_hdrwords++; qp->s_hdrwords++;
@ -392,21 +393,21 @@ int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
ps->s_txreq->sde = priv->s_sde; ps->s_txreq->sde = priv->s_sde;
priv->s_sendcontext = qp_to_send_context(qp, priv->s_sc); priv->s_sendcontext = qp_to_send_context(qp, priv->s_sc);
ps->s_txreq->psc = priv->s_sendcontext; ps->s_txreq->psc = priv->s_sendcontext;
ps->s_txreq->phdr.hdr.lrh[0] = cpu_to_be16(lrh0); ps->s_txreq->phdr.hdr.ibh.lrh[0] = cpu_to_be16(lrh0);
ps->s_txreq->phdr.hdr.lrh[1] = ps->s_txreq->phdr.hdr.ibh.lrh[1] =
cpu_to_be16(rdma_ah_get_dlid(ah_attr)); cpu_to_be16(rdma_ah_get_dlid(ah_attr));
ps->s_txreq->phdr.hdr.lrh[2] = ps->s_txreq->phdr.hdr.ibh.lrh[2] =
cpu_to_be16(qp->s_hdrwords + nwords + SIZE_OF_CRC); cpu_to_be16(qp->s_hdrwords + nwords + SIZE_OF_CRC);
if (rdma_ah_get_dlid(ah_attr) == be16_to_cpu(IB_LID_PERMISSIVE)) { if (rdma_ah_get_dlid(ah_attr) == be16_to_cpu(IB_LID_PERMISSIVE)) {
ps->s_txreq->phdr.hdr.lrh[3] = IB_LID_PERMISSIVE; ps->s_txreq->phdr.hdr.ibh.lrh[3] = IB_LID_PERMISSIVE;
} else { } else {
lid = ppd->lid; lid = ppd->lid;
if (lid) { if (lid) {
lid |= rdma_ah_get_path_bits(ah_attr) & lid |= rdma_ah_get_path_bits(ah_attr) &
((1 << ppd->lmc) - 1); ((1 << ppd->lmc) - 1);
ps->s_txreq->phdr.hdr.lrh[3] = cpu_to_be16(lid); ps->s_txreq->phdr.hdr.ibh.lrh[3] = cpu_to_be16(lid);
} else { } else {
ps->s_txreq->phdr.hdr.lrh[3] = IB_LID_PERMISSIVE; ps->s_txreq->phdr.hdr.ibh.lrh[3] = IB_LID_PERMISSIVE;
} }
} }
if (wqe->wr.send_flags & IB_SEND_SOLICITED) if (wqe->wr.send_flags & IB_SEND_SOLICITED)

24
drivers/infiniband/hw/hfi1/verbs.c
View File

@ -506,6 +506,24 @@ again:
} }
} }
static u8 get_opcode(struct hfi1_opa_header *hdr)
{
struct ib_other_headers *ohdr;
if (hdr->hdr_type) {
if (hfi1_16B_get_l4(&hdr->opah) == OPA_16B_L4_IB_LOCAL)
ohdr = &hdr->opah.u.oth;
else
ohdr = &hdr->opah.u.l.oth;
} else {
if (ib_get_lnh(&hdr->ibh) == HFI1_LRH_BTH)
ohdr = &hdr->ibh.u.oth;
else
ohdr = &hdr->ibh.u.l.oth;
}
return ib_bth_get_opcode(ohdr);
}
/* /*
* Make sure the QP is ready and able to accept the given opcode. * Make sure the QP is ready and able to accept the given opcode.
*/ */
@ -686,7 +704,7 @@ static void verbs_sdma_complete(
if (tx->wqe) { if (tx->wqe) {
hfi1_send_complete(qp, tx->wqe, IB_WC_SUCCESS); hfi1_send_complete(qp, tx->wqe, IB_WC_SUCCESS);
} else if (qp->ibqp.qp_type == IB_QPT_RC) { } else if (qp->ibqp.qp_type == IB_QPT_RC) {
struct ib_header *hdr; struct hfi1_opa_header *hdr;
hdr = &tx->phdr.hdr; hdr = &tx->phdr.hdr;
hfi1_rc_send_complete(qp, hdr); hfi1_rc_send_complete(qp, hdr);
@ -1175,7 +1193,7 @@ static inline send_routine get_send_routine(struct rvt_qp *qp,
{ {
struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device); struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
struct hfi1_qp_priv *priv = qp->priv; struct hfi1_qp_priv *priv = qp->priv;
struct ib_header *h = &tx->phdr.hdr; struct hfi1_opa_header *h = &tx->phdr.hdr;
if (unlikely(!(dd->flags & HFI1_HAS_SEND_DMA))) if (unlikely(!(dd->flags & HFI1_HAS_SEND_DMA)))
return dd->process_pio_send; return dd->process_pio_send;
@ -1221,7 +1239,7 @@ int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
int ret; int ret;
u8 lnh; u8 lnh;
hdr = &ps->s_txreq->phdr.hdr; hdr = &ps->s_txreq->phdr.hdr.ibh;
/* locate the pkey within the headers */ /* locate the pkey within the headers */
lnh = ib_get_lnh(hdr); lnh = ib_get_lnh(hdr);
if (lnh == HFI1_LRH_GRH) if (lnh == HFI1_LRH_GRH)

22
drivers/infiniband/hw/hfi1/verbs.h
View File

@ -115,6 +115,14 @@ struct hfi1_16b_header {
} u; } u;
} __packed; } __packed;
struct hfi1_opa_header {
union {
struct ib_header ibh; /* 9B header */
struct hfi1_16b_header opah; /* 16B header */
};
u8 hdr_type; /* 9B or 16B */
} __packed;
struct hfi1_ahg_info { struct hfi1_ahg_info {
u32 ahgdesc[2]; u32 ahgdesc[2];
u16 tx_flags; u16 tx_flags;
@ -124,7 +132,7 @@ struct hfi1_ahg_info {
struct hfi1_sdma_header { struct hfi1_sdma_header {
__le64 pbc; __le64 pbc;
struct ib_header hdr; struct hfi1_opa_header hdr;
} __packed; } __packed;
/* /*
@ -326,7 +334,7 @@ u8 ah_to_sc(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr);
struct ib_ah *hfi1_create_qp0_ah(struct hfi1_ibport *ibp, u16 dlid); struct ib_ah *hfi1_create_qp0_ah(struct hfi1_ibport *ibp, u16 dlid);
void hfi1_rc_send_complete(struct rvt_qp *qp, struct ib_header *hdr); void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah);
void hfi1_ud_rcv(struct hfi1_packet *packet); void hfi1_ud_rcv(struct hfi1_packet *packet);
@ -347,16 +355,6 @@ int hfi1_check_send_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe);
extern const u32 rc_only_opcode; extern const u32 rc_only_opcode;
extern const u32 uc_only_opcode; extern const u32 uc_only_opcode;
static inline u8 get_opcode(struct ib_header *h)
{
u16 lnh = be16_to_cpu(h->lrh[0]) & 3;
if (lnh == IB_LNH_IBA_LOCAL)
return be32_to_cpu(h->u.oth.bth[0]) >> 24;
else
return be32_to_cpu(h->u.l.oth.bth[0]) >> 24;
}
int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_packet *packet); int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_packet *packet);
u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr, u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr,