Add RDMA ibverb driver plugin

RDMA ibverb is a userspace API to efficiently rx/tx packets. This is an
initial, unoptimized driver targeting Mellanox cards.
Next steps should include batching, multiqueue and additional cards.

Change-Id: I0309c7a543f75f2f9317eaf63ca502ac7a093ef9
Signed-off-by: Benoît Ganne <bganne@cisco.com>

1 files changed, 89 insertions, 0 deletions

diff --git a/src/plugins/rdma/format.c b/src/plugins/rdma/format.c
new file mode 100644
index 00000000000..7ef65d43957
--- /dev/null
+++ b/src/plugins/rdma/format.c
@@ -0,0 +1,89 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vlib/pci/pci.h>
+#include <vnet/ethernet/ethernet.h>
+
+#include <rdma/rdma.h>
+
+u8 *
+format_rdma_device_name (u8 * s, va_list * args)
+{
+  u32 i = va_arg (*args, u32);
+  rdma_main_t *rm = &rdma_main;
+  rdma_device_t *rd = vec_elt_at_index (rm->devices, i);
+
+  s = format (s, "rdma-%u", rd->dev_instance);
+  return s;
+}
+
+u8 *
+format_rdma_device_flags (u8 * s, va_list * args)
+{
+  rdma_device_t *rd = va_arg (*args, rdma_device_t *);
+  u8 *t = 0;
+
+#define _(a, b, c) if (rd->flags & (1 << a)) \
+t = format (t, "%s%s", t ? " ":"", c);
+  foreach_rdma_device_flags
+#undef _
+    s = format (s, "%v", t);
+  vec_free (t);
+  return s;
+}
+
+u8 *
+format_rdma_device (u8 * s, va_list * args)
+{
+  u32 i = va_arg (*args, u32);
+  rdma_main_t *rm = &rdma_main;
+  rdma_device_t *rd = vec_elt_at_index (rm->devices, i);
+  u32 indent = format_get_indent (s);
+
+  s = format (s, "flags: %U", format_rdma_device_flags, rd);
+  if (rd->error)
+    s = format (s, "\n%Uerror %U", format_white_space, indent,
+		format_clib_error, rd->error);
+
+  return s;
+}
+
+u8 *
+format_rdma_input_trace (u8 * s, va_list * args)
+{
+  vlib_main_t *vm = va_arg (*args, vlib_main_t *);
+  vlib_node_t *node = va_arg (*args, vlib_node_t *);
+  rdma_input_trace_t *t = va_arg (*args, rdma_input_trace_t *);
+  vnet_main_t *vnm = vnet_get_main ();
+  vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, t->hw_if_index);
+
+  s = format (s, "rdma: %v (%d) next-node %U",
+	      hi->name, t->hw_if_index, format_vlib_next_node_name, vm,
+	      node->index, t->next_index);
+
+  return s;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */