@@ -73,6 +73,7 @@
#include "chip_registers.h"
#include "common.h"
+#include "opfn.h"
#include "verbs.h"
#include "pio.h"
#include "chip.h"
new file mode 100644
@@ -0,0 +1,99 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
+/*
+ * Copyright(c) 2018 Intel Corporation.
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#ifndef _HFI1_OPFN_H
+#define _HFI1_OPFN_H
+
+/**
+ * DOC: Omni Path Feature Negotion (OPFN)
+ *
+ * OPFN is a discovery protocol for Intel Omni-Path fabric that
+ * allows two RC QPs to negotiate a common feature that both QPs
+ * can support. Currently, the only OPA feature that OPFN
+ * supports is TID RDMA.
+ *
+ * Architecture
+ *
+ * OPFN involves the communication between two QPs on the HFI
+ * level on an Omni-Path fabric, and ULPs have no knowledge of
+ * OPFN at all.
+ *
+ * Implementation
+ *
+ * OPFN extends the existing IB RC protocol with the following
+ * changes:
+ * -- Uses Bit 24 (reserved) of DWORD 1 of Base Transport
+ * Header (BTH1) to indicate that the RC QP supports OPFN;
+ * -- Uses a combination of RC COMPARE_SWAP opcode (0x13) and
+ * the address U64_MAX (0xFFFFFFFFFFFFFFFF) as an OPFN
+ * request; The 64-bit data carried with the request/response
+ * contains the parameters for negotiation and will be
+ * defined in tid_rdma.c file;
+ * -- Defines IB_WR_RESERVED3 as IB_WR_OPFN.
+ *
+ * The OPFN communication will be triggered when an RC QP
+ * receives a request with Bit 24 of BTH1 set. The responder QP
+ * will then post send an OPFN request with its local
+ * parameters, which will be sent to the requester QP once all
+ * existing requests on the responder QP side have been sent.
+ * Once the requester QP receives the OPFN request, it will
+ * keep a copy of the responder QP's parameters, and return a
+ * response packet with its own local parameters. The responder
+ * QP receives the response packet and keeps a copy of the requester
+ * QP's parameters. After this exchange, each side has the parameters
+ * for both sides and therefore can select the right parameters
+ * for future transactions
+ */
+
+/* STL Verbs Extended */
+#define IB_BTHE_E_SHIFT 24
+
+struct hfi1_opfn_data {
+ bool extended;
+};
+
+#endif /* _HFI1_OPFN_H */
@@ -89,8 +89,8 @@ static int make_rc_ack(struct hfi1_ibdev *dev, struct rvt_qp *qp,
struct rvt_ack_entry *e;
u32 hwords;
u32 len;
- u32 bth0;
- u32 bth2;
+ u32 bth0, bth2;
+ u32 bth1 = qp->remote_qpn | (HFI1_CAP_IS_KSET(OPFN) << IB_BTHE_E_SHIFT);
int middle = 0;
u32 pmtu = qp->pmtu;
struct hfi1_qp_priv *priv = qp->priv;
@@ -229,7 +229,7 @@ static int make_rc_ack(struct hfi1_ibdev *dev, struct rvt_qp *qp,
ps->s_txreq->sde = priv->s_sde;
ps->s_txreq->s_cur_size = len;
ps->s_txreq->hdr_dwords = hwords;
- hfi1_make_ruc_header(qp, ohdr, bth0, bth2, middle, ps);
+ hfi1_make_ruc_header(qp, ohdr, bth0, bth1, bth2, middle, ps);
return 1;
bail:
@@ -262,8 +262,8 @@ int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
struct rvt_swqe *wqe;
u32 hwords;
u32 len;
- u32 bth0 = 0;
- u32 bth2;
+ u32 bth0 = 0, bth2;
+ u32 bth1 = qp->remote_qpn | (HFI1_CAP_IS_KSET(OPFN) << IB_BTHE_E_SHIFT);
u32 pmtu = qp->pmtu;
char newreq;
int middle = 0;
@@ -693,6 +693,7 @@ int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
qp,
ohdr,
bth0 | (qp->s_state << 24),
+ bth1,
bth2,
middle,
ps);
@@ -796,6 +797,11 @@ static inline void hfi1_make_rc_ack_9B(struct hfi1_packet *packet,
if (qp->s_mig_state == IB_MIG_MIGRATED)
bth0 |= IB_BTH_MIG_REQ;
bth1 = (!!is_fecn) << IB_BECN_SHIFT;
+ /*
+ * Inline ACKs go out without the use of the Verbs send engine, so
+ * we need to set the STL Verbs Extended bit here
+ */
+ bth1 |= HFI1_CAP_IS_KSET(OPFN) << IB_BTHE_E_SHIFT;
hfi1_make_bth_aeth(qp, ohdr, bth0, bth1);
}
@@ -2058,7 +2064,6 @@ void hfi1_rc_rcv(struct hfi1_packet *packet)
return;
is_fecn = process_ecn(qp, packet, false);
-
/*
* Process responses (ACKs) before anything else. Note that the
* packet sequence number will be for something in the send work
@@ -577,7 +577,6 @@ static inline void hfi1_make_ruc_bth(struct rvt_qp *qp,
struct ib_other_headers *ohdr,
u32 bth0, u32 bth1, u32 bth2)
{
- bth1 |= qp->remote_qpn;
ohdr->bth[0] = cpu_to_be32(bth0);
ohdr->bth[1] = cpu_to_be32(bth1);
ohdr->bth[2] = cpu_to_be32(bth2);
@@ -599,13 +598,13 @@ static inline void hfi1_make_ruc_bth(struct rvt_qp *qp,
*/
static inline void hfi1_make_ruc_header_16B(struct rvt_qp *qp,
struct ib_other_headers *ohdr,
- u32 bth0, u32 bth2, int middle,
+ u32 bth0, u32 bth1, u32 bth2,
+ int middle,
struct hfi1_pkt_state *ps)
{
struct hfi1_qp_priv *priv = qp->priv;
struct hfi1_ibport *ibp = ps->ibp;
struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
- u32 bth1 = 0;
u32 slid;
u16 pkey = hfi1_get_pkey(ibp, qp->s_pkey_index);
u8 l4 = OPA_16B_L4_IB_LOCAL;
@@ -687,12 +686,12 @@ static inline void hfi1_make_ruc_header_16B(struct rvt_qp *qp,
*/
static inline void hfi1_make_ruc_header_9B(struct rvt_qp *qp,
struct ib_other_headers *ohdr,
- u32 bth0, u32 bth2, int middle,
+ u32 bth0, u32 bth1, u32 bth2,
+ int middle,
struct hfi1_pkt_state *ps)
{
struct hfi1_qp_priv *priv = qp->priv;
struct hfi1_ibport *ibp = ps->ibp;
- u32 bth1 = 0;
u16 pkey = hfi1_get_pkey(ibp, qp->s_pkey_index);
u16 lrh0 = HFI1_LRH_BTH;
u8 extra_bytes = -ps->s_txreq->s_cur_size & 3;
@@ -742,7 +741,7 @@ static inline void hfi1_make_ruc_header_9B(struct rvt_qp *qp,
typedef void (*hfi1_make_ruc_hdr)(struct rvt_qp *qp,
struct ib_other_headers *ohdr,
- u32 bth0, u32 bth2, int middle,
+ u32 bth0, u32 bth1, u32 bth2, int middle,
struct hfi1_pkt_state *ps);
/* We support only two types - 9B and 16B for now */
@@ -752,7 +751,7 @@ typedef void (*hfi1_make_ruc_hdr)(struct rvt_qp *qp,
};
void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
- u32 bth0, u32 bth2, int middle,
+ u32 bth0, u32 bth1, u32 bth2, int middle,
struct hfi1_pkt_state *ps)
{
struct hfi1_qp_priv *priv = qp->priv;
@@ -773,7 +772,8 @@ void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
priv->s_ahg->ahgidx = 0;
/* Make the appropriate header */
- hfi1_ruc_header_tbl[priv->hdr_type](qp, ohdr, bth0, bth2, middle, ps);
+ hfi1_ruc_header_tbl[priv->hdr_type](qp, ohdr, bth0, bth1, bth2, middle,
+ ps);
}
/* when sending, force a reschedule every one of these periods */
@@ -271,7 +271,8 @@ int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
ps->s_txreq->ss = &qp->s_sge;
ps->s_txreq->s_cur_size = len;
hfi1_make_ruc_header(qp, ohdr, bth0 | (qp->s_state << 24),
- mask_psn(qp->s_psn++), middle, ps);
+ qp->remote_qpn, mask_psn(qp->s_psn++),
+ middle, ps);
return 1;
done_free_tx:
@@ -163,6 +163,7 @@ struct hfi1_qp_priv {
u8 s_sc; /* SC[0..4] for next packet */
struct iowait s_iowait;
struct list_head tid_wait; /* for queueing tid space */
+ struct hfi1_opfn_data opfn;
struct tid_flow_state flow_state;
struct tid_rdma_qp_params tid_rdma;
struct rvt_qp *owner;
@@ -376,7 +377,7 @@ u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr,
const struct ib_global_route *grh, u32 hwords, u32 nwords);
void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
- u32 bth0, u32 bth2, int middle,
+ u32 bth0, u32 bth1, u32 bth2, int middle,
struct hfi1_pkt_state *ps);
void _hfi1_do_send(struct work_struct *work);