Messages in this thread Patch in this message | | | Subject | [patch 175/198] IB/mthca: implement RDMA/atomic operations for mem-free mode | From | akpm@osdl ... | Date | Tue, 12 Apr 2005 03:33:16 -0700 |
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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); _ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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