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RDMA/rxe: Lookup kernel AH from ah index in UD WQEs

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Add code to rxe_get_av in rxe_av.c to use the AH index in UD send WQEs to
lookup the kernel AH. For old user providers continue to use the AV passed
in WQEs. Move setting pkt->rxe to before the call to rxe_get_av() to get
access to the AH pool.

Link: https://lore.kernel.org/r/20211007204051.10086-6-rpearsonhpe@gmail.com
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Bob Pearson 2021-10-07 15:40:51 -05:00 committed by Jason Gunthorpe
parent 4da698eabf
commit e2fe06c908
2 changed files with 24 additions and 4 deletions
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20
drivers/infiniband/sw/rxe/rxe_av.c
View file

@ -101,11 +101,29 @@ void rxe_av_fill_ip_info(struct rxe_av *av, struct rdma_ah_attr *attr)
struct rxe_av *rxe_get_av(struct rxe_pkt_info *pkt)
{
struct rxe_ah *ah;
u32 ah_num;
if (!pkt || !pkt->qp)
return NULL;
if (qp_type(pkt->qp) == IB_QPT_RC || qp_type(pkt->qp) == IB_QPT_UC)
return &pkt->qp->pri_av;
return (pkt->wqe) ? &pkt->wqe->wr.wr.ud.av : NULL;
if (!pkt->wqe)
return NULL;
ah_num = pkt->wqe->wr.wr.ud.ah_num;
if (ah_num) {
/* only new user provider or kernel client */
ah = rxe_pool_get_index(&pkt->rxe->ah_pool, ah_num);
if (!ah || ah->ah_num != ah_num || rxe_ah_pd(ah) != pkt->qp->pd) {
pr_warn("Unable to find AH matching ah_num\n");
return NULL;
}
return &ah->av;
}
/* only old user provider for UD sends*/
return &pkt->wqe->wr.wr.ud.av;
}

8
drivers/infiniband/sw/rxe/rxe_req.c
View file

@ -379,9 +379,8 @@ static struct sk_buff *init_req_packet(struct rxe_qp *qp,
/* length from start of bth to end of icrc */
paylen = rxe_opcode[opcode].length + payload + pad + RXE_ICRC_SIZE;
/* pkt->hdr, rxe, port_num and mask are initialized in ifc
* layer
*/
/* pkt->hdr, port_num and mask are initialized in ifc layer */
pkt->rxe = rxe;
pkt->opcode = opcode;
pkt->qp = qp;
pkt->psn = qp->req.psn;
@ -391,6 +390,9 @@ static struct sk_buff *init_req_packet(struct rxe_qp *qp,
/* init skb */
av = rxe_get_av(pkt);
if (!av)
return NULL;
skb = rxe_init_packet(rxe, av, paylen, pkt);
if (unlikely(!skb))
return NULL;