netdev - [RFC 16/19] RDMA/qedr: Add support for read with invalidate, supported in iWARP

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Date:   Mon, 26 Jun 2017 21:07:06 +0300
From:   Michal Kalderon <Michal.Kalderon@...ium.com>
To:     <michal.kalderon@...ium.com>, <ram.amrani@...ium.com>,
        <yuval.mintz@...ium.com>, <ariel.elior@...ium.com>,
        <davem@...emloft.net>, <netdev@...r.kernel.org>,
        <linux-rdma@...r.kernel.org>, <dledford@...hat.com>
CC:     Michal Kalderon <Michal.Kalderon@...ium.com>,
        Ram Amrani <Ram.Amrani@...ium.com>,
        Ariel Elior <Ariel.Elior@...ium.com>
Subject: [RFC 16/19] RDMA/qedr: Add support for read with invalidate, supported in iWARP

iWARP supports read with invalidate. There is an assumption
that read with invalidate will only be called on an iWARP device

Signed-off-by: Michal Kalderon <Michal.Kalderon@...ium.com>
Signed-off-by: Ram Amrani <Ram.Amrani@...ium.com>
Signed-off-by: Ariel Elior <Ariel.Elior@...ium.com>

---
 drivers/infiniband/hw/qedr/qedr_hsi_rdma.h | 6 ++++--
 drivers/infiniband/hw/qedr/verbs.c         | 8 +++-----
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/infiniband/hw/qedr/qedr_hsi_rdma.h b/drivers/infiniband/hw/qedr/qedr_hsi_rdma.h
index 5c98d20..b7587f1 100644
--- a/drivers/infiniband/hw/qedr/qedr_hsi_rdma.h
+++ b/drivers/infiniband/hw/qedr/qedr_hsi_rdma.h
@@ -655,8 +655,10 @@ struct rdma_sq_rdma_wqe_1st {
 #define RDMA_SQ_RDMA_WQE_1ST_INLINE_FLG_SHIFT      4
 #define RDMA_SQ_RDMA_WQE_1ST_DIF_ON_HOST_FLG_MASK  0x1
 #define RDMA_SQ_RDMA_WQE_1ST_DIF_ON_HOST_FLG_SHIFT 5
-#define RDMA_SQ_RDMA_WQE_1ST_RESERVED0_MASK        0x3
-#define RDMA_SQ_RDMA_WQE_1ST_RESERVED0_SHIFT       6
+#define RDMA_SQ_RDMA_WQE_1ST_READ_INV_FLG_MASK     0x1
+#define RDMA_SQ_RDMA_WQE_1ST_READ_INV_FLG_SHIFT    6
+#define RDMA_SQ_RDMA_WQE_1ST_RESERVED0_MASK        0x1
+#define RDMA_SQ_RDMA_WQE_1ST_RESERVED0_SHIFT       7
 	u8 wqe_size;
 	u8 prev_wqe_size;
 };
diff --git a/drivers/infiniband/hw/qedr/verbs.c b/drivers/infiniband/hw/qedr/verbs.c
index 7fef9b3..fc9ff13 100644
--- a/drivers/infiniband/hw/qedr/verbs.c
+++ b/drivers/infiniband/hw/qedr/verbs.c
@@ -2837,6 +2837,7 @@ static enum ib_wc_opcode qedr_ib_to_wc_opcode(enum ib_wr_opcode opcode)
 	case IB_WR_SEND_WITH_INV:
 		return IB_WC_SEND;
 	case IB_WR_RDMA_READ:
+	case IB_WR_RDMA_READ_WITH_INV:
 		return IB_WC_RDMA_READ;
 	case IB_WR_ATOMIC_CMP_AND_SWP:
 		return IB_WC_COMP_SWAP;
@@ -2997,11 +2998,8 @@ static int __qedr_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 		qp->wqe_wr_id[qp->sq.prod].bytes_len = rwqe->length;
 		break;
 	case IB_WR_RDMA_READ_WITH_INV:
-		DP_ERR(dev,
-		       "RDMA READ WITH INVALIDATE not supported\n");
-		*bad_wr = wr;
-		rc = -EINVAL;
-		break;
+		SET_FIELD2(wqe->flags, RDMA_SQ_RDMA_WQE_1ST_READ_INV_FLG, 1);
+		/* fallthrough... same is identical to RDMA READ */
 
 	case IB_WR_RDMA_READ:
 		wqe->req_type = RDMA_SQ_REQ_TYPE_RDMA_RD;
-- 
1.8.3.1