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 Fri Apr 1 14:14:38 2005
+++ 25-akpm/drivers/infiniband/hw/mthca/mthca_qp.c Fri Apr 1 14:14:38 2005
@@ -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);
_