Commit ddb934e0 authored by Roland Dreier's avatar Roland Dreier Committed by Linus Torvalds

[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: default avatarRoland Dreier <roland@topspin.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent b87dcfba
......@@ -1775,6 +1775,53 @@ int mthca_arbel_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
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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