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path: root/drivers/infiniband/hw/hfi1/rc.c
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Diffstat (limited to 'drivers/infiniband/hw/hfi1/rc.c')
-rw-r--r--drivers/infiniband/hw/hfi1/rc.c53
1 files changed, 32 insertions, 21 deletions
diff --git a/drivers/infiniband/hw/hfi1/rc.c b/drivers/infiniband/hw/hfi1/rc.c
index a922edcf23d6..7c8cfb149da0 100644
--- a/drivers/infiniband/hw/hfi1/rc.c
+++ b/drivers/infiniband/hw/hfi1/rc.c
@@ -1432,7 +1432,7 @@ void hfi1_send_rc_ack(struct hfi1_packet *packet, bool is_fecn)
pbc = create_pbc(ppd, pbc_flags, qp->srate_mbps,
sc_to_vlt(ppd->dd, sc5), plen);
pbuf = sc_buffer_alloc(rcd->sc, plen, NULL, NULL);
- if (!pbuf) {
+ if (IS_ERR_OR_NULL(pbuf)) {
/*
* We have no room to send at the moment. Pass
* responsibility for sending the ACK to the send engine
@@ -1701,6 +1701,36 @@ static void reset_sending_psn(struct rvt_qp *qp, u32 psn)
}
}
+/**
+ * hfi1_rc_verbs_aborted - handle abort status
+ * @qp: the QP
+ * @opah: the opa header
+ *
+ * This code modifies both ACK bit in BTH[2]
+ * and the s_flags to go into send one mode.
+ *
+ * This serves to throttle the send engine to only
+ * send a single packet in the likely case the
+ * a link has gone down.
+ */
+void hfi1_rc_verbs_aborted(struct rvt_qp *qp, struct hfi1_opa_header *opah)
+{
+ struct ib_other_headers *ohdr = hfi1_get_rc_ohdr(opah);
+ u8 opcode = ib_bth_get_opcode(ohdr);
+ u32 psn;
+
+ /* ignore responses */
+ if ((opcode >= OP(RDMA_READ_RESPONSE_FIRST) &&
+ opcode <= OP(ATOMIC_ACKNOWLEDGE)) ||
+ opcode == TID_OP(READ_RESP) ||
+ opcode == TID_OP(WRITE_RESP))
+ return;
+
+ psn = ib_bth_get_psn(ohdr) | IB_BTH_REQ_ACK;
+ ohdr->bth[2] = cpu_to_be32(psn);
+ qp->s_flags |= RVT_S_SEND_ONE;
+}
+
/*
* This should be called with the QP s_lock held and interrupts disabled.
*/
@@ -1709,8 +1739,6 @@ void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah)
struct ib_other_headers *ohdr;
struct hfi1_qp_priv *priv = qp->priv;
struct rvt_swqe *wqe;
- struct ib_header *hdr = NULL;
- struct hfi1_16b_header *hdr_16b = NULL;
u32 opcode, head, tail;
u32 psn;
struct tid_rdma_request *req;
@@ -1719,24 +1747,7 @@ void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah)
if (!(ib_rvt_state_ops[qp->state] & RVT_SEND_OR_FLUSH_OR_RECV_OK))
return;
- /* Find out where the BTH is */
- if (priv->hdr_type == HFI1_PKT_TYPE_9B) {
- hdr = &opah->ibh;
- if (ib_get_lnh(hdr) == HFI1_LRH_BTH)
- ohdr = &hdr->u.oth;
- else
- ohdr = &hdr->u.l.oth;
- } else {
- u8 l4;
-
- hdr_16b = &opah->opah;
- l4 = hfi1_16B_get_l4(hdr_16b);
- if (l4 == OPA_16B_L4_IB_LOCAL)
- ohdr = &hdr_16b->u.oth;
- else
- ohdr = &hdr_16b->u.l.oth;
- }
-
+ ohdr = hfi1_get_rc_ohdr(opah);
opcode = ib_bth_get_opcode(ohdr);
if ((opcode >= OP(RDMA_READ_RESPONSE_FIRST) &&
opcode <= OP(ATOMIC_ACKNOWLEDGE)) ||