From: akpm@osdl.org
To: torvalds@osdl.org
Cc: linux-kernel@vger.kernel.org, akpm@osdl.org, roland@topspin.com
Subject: [patch 175/198] IB/mthca: implement RDMA/atomic operations for mem-free mode
Date: Tue, 12 Apr 2005 03:33:16 -0700 [thread overview]
Message-ID: <200504121033.j3CAXMiH005863@shell0.pdx.osdl.net> (raw)
From: Roland Dreier <roland@topspin.com>
Add code to support RDMA and atomic send work requests in mem-free mode.
Signed-off-by: Roland Dreier <roland@topspin.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---
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);
_
reply other threads:[~2005-04-12 10:38 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=200504121033.j3CAXMiH005863@shell0.pdx.osdl.net \
--to=akpm@osdl.org \
--cc=linux-kernel@vger.kernel.org \
--cc=roland@topspin.com \
--cc=torvalds@osdl.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).