tree 0612ad8ee0fd7318f6d8613ddf60ea7f898bd593
parent afeb30604d658897993250be0982b1c7dcde8c5e
author Roland Dreier <[EMAIL PROTECTED]> Tue Apr 12 08:26:50 2005
committer Linus Torvalds <[EMAIL PROTECTED]> Tue Apr 12 08:26:50 2005
[PATCH] IB/mthca: implement RDMA/atomic operations for mem-free mode
Add code to support RDMA and atomic send work requests in mem-free mode.
Signed-off-by: Roland Dreier <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
mthca_qp.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 47 insertions(+)
Index: drivers/infiniband/hw/mthca/mthca_qp.c
===================================================================
---
ac390dd0c99d171e4f23f51de2078137a7abd917/drivers/infiniband/hw/mthca/mthca_qp.c
(mode:100644 sha1:eeda22bc00f753796f67569286a228d3d4bca0d0)
+++
0612ad8ee0fd7318f6d8613ddf60ea7f898bd593/drivers/infiniband/hw/mthca/mthca_qp.c
(mode:100644 sha1:f1f0838c9fb39a73ab9e8cfe94fc956b278d62ca)
@@ -1775,6 +1775,53 @@
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);
-
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