Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / infiniband / hw / mlx5 / ah.c

diff --git a/kernel/drivers/infiniband/hw/mlx5/ah.c b/kernel/drivers/infiniband/hw/mlx5/ah.c
new file mode 100644 (file)
index 0000000..6608058
--- /dev/null
+++ b/kernel/drivers/infiniband/hw/mlx5/ah.c
@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "mlx5_ib.h"
+
+struct ib_ah *create_ib_ah(struct ib_ah_attr *ah_attr,
+                          struct mlx5_ib_ah *ah)
+{
+       if (ah_attr->ah_flags & IB_AH_GRH) {
+               memcpy(ah->av.rgid, &ah_attr->grh.dgid, 16);
+               ah->av.grh_gid_fl = cpu_to_be32(ah_attr->grh.flow_label |
+                                               (1 << 30) |
+                                               ah_attr->grh.sgid_index << 20);
+               ah->av.hop_limit = ah_attr->grh.hop_limit;
+               ah->av.tclass = ah_attr->grh.traffic_class;
+       }
+
+       ah->av.rlid = cpu_to_be16(ah_attr->dlid);
+       ah->av.fl_mlid = ah_attr->src_path_bits & 0x7f;
+       ah->av.stat_rate_sl = (ah_attr->static_rate << 4) | (ah_attr->sl & 0xf);
+
+       return &ah->ibah;
+}
+
+struct ib_ah *mlx5_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
+{
+       struct mlx5_ib_ah *ah;
+
+       ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
+       if (!ah)
+               return ERR_PTR(-ENOMEM);
+
+       return create_ib_ah(ah_attr, ah); /* never fails */
+}
+
+int mlx5_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
+{
+       struct mlx5_ib_ah *ah = to_mah(ibah);
+       u32 tmp;
+
+       memset(ah_attr, 0, sizeof(*ah_attr));
+
+       tmp = be32_to_cpu(ah->av.grh_gid_fl);
+       if (tmp & (1 << 30)) {
+               ah_attr->ah_flags = IB_AH_GRH;
+               ah_attr->grh.sgid_index = (tmp >> 20) & 0xff;
+               ah_attr->grh.flow_label = tmp & 0xfffff;
+               memcpy(&ah_attr->grh.dgid, ah->av.rgid, 16);
+               ah_attr->grh.hop_limit = ah->av.hop_limit;
+               ah_attr->grh.traffic_class = ah->av.tclass;
+       }
+       ah_attr->dlid = be16_to_cpu(ah->av.rlid);
+       ah_attr->static_rate = ah->av.stat_rate_sl >> 4;
+       ah_attr->sl = ah->av.stat_rate_sl & 0xf;
+
+       return 0;
+}
+
+int mlx5_ib_destroy_ah(struct ib_ah *ah)
+{
+       kfree(to_mah(ah));
+       return 0;
+}