From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262279AbVDLKig (ORCPT ); Tue, 12 Apr 2005 06:38:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262316AbVDLKiK (ORCPT ); Tue, 12 Apr 2005 06:38:10 -0400 Received: from fire.osdl.org ([65.172.181.4]:44746 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S262279AbVDLKdb (ORCPT ); Tue, 12 Apr 2005 06:33:31 -0400 Message-Id: <200504121033.j3CAXMiH005863@shell0.pdx.osdl.net> Subject: [patch 175/198] IB/mthca: implement RDMA/atomic operations for mem-free mode To: torvalds@osdl.org Cc: linux-kernel@vger.kernel.org, akpm@osdl.org, roland@topspin.com From: akpm@osdl.org Date: Tue, 12 Apr 2005 03:33:16 -0700 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org From: Roland Dreier Add code to support RDMA and atomic send work requests in mem-free mode. Signed-off-by: Roland Dreier Signed-off-by: Andrew Morton --- 25-akpm/drivers/infiniband/hw/mthca/mthca_qp.c | 47 +++++++++++++++++++++++++ 1 files changed, 47 insertions(+) diff -puN drivers/infiniband/hw/mthca/mthca_qp.c~ib-mthca-implement-rdma-atomic-operations-for-mem-free-mode drivers/infiniband/hw/mthca/mthca_qp.c --- 25/drivers/infiniband/hw/mthca/mthca_qp.c~ib-mthca-implement-rdma-atomic-operations-for-mem-free-mode 2005-04-12 03:21:45.105279856 -0700 +++ 25-akpm/drivers/infiniband/hw/mthca/mthca_qp.c 2005-04-12 03:21:45.109279248 -0700 @@ -1775,6 +1775,53 @@ int mthca_arbel_post_send(struct ib_qp * size = sizeof (struct mthca_next_seg) / 16; switch (qp->transport) { + case RC: + switch (wr->opcode) { + case IB_WR_ATOMIC_CMP_AND_SWP: + case IB_WR_ATOMIC_FETCH_AND_ADD: + ((struct mthca_raddr_seg *) wqe)->raddr = + cpu_to_be64(wr->wr.atomic.remote_addr); + ((struct mthca_raddr_seg *) wqe)->rkey = + cpu_to_be32(wr->wr.atomic.rkey); + ((struct mthca_raddr_seg *) wqe)->reserved = 0; + + wqe += sizeof (struct mthca_raddr_seg); + + if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) { + ((struct mthca_atomic_seg *) wqe)->swap_add = + cpu_to_be64(wr->wr.atomic.swap); + ((struct mthca_atomic_seg *) wqe)->compare = + cpu_to_be64(wr->wr.atomic.compare_add); + } else { + ((struct mthca_atomic_seg *) wqe)->swap_add = + cpu_to_be64(wr->wr.atomic.compare_add); + ((struct mthca_atomic_seg *) wqe)->compare = 0; + } + + wqe += sizeof (struct mthca_atomic_seg); + size += sizeof (struct mthca_raddr_seg) / 16 + + sizeof (struct mthca_atomic_seg); + break; + + case IB_WR_RDMA_WRITE: + case IB_WR_RDMA_WRITE_WITH_IMM: + case IB_WR_RDMA_READ: + ((struct mthca_raddr_seg *) wqe)->raddr = + cpu_to_be64(wr->wr.rdma.remote_addr); + ((struct mthca_raddr_seg *) wqe)->rkey = + cpu_to_be32(wr->wr.rdma.rkey); + ((struct mthca_raddr_seg *) wqe)->reserved = 0; + wqe += sizeof (struct mthca_raddr_seg); + size += sizeof (struct mthca_raddr_seg) / 16; + break; + + default: + /* No extra segments required for sends */ + break; + } + + break; + case UD: memcpy(((struct mthca_arbel_ud_seg *) wqe)->av, to_mah(wr->wr.ud.ah)->av, MTHCA_AV_SIZE); _