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, 133 insertions, 0 deletions

diff --git a/src/plugins/rdma/cli.c b/src/plugins/rdma/cli.c
new file mode 100644
index 00000000000..8919603e293
--- /dev/null
+++ b/src/plugins/rdma/cli.c
@@ -0,0 +1,133 @@
+/*
+ *------------------------------------------------------------------
+ * 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 <stdint.h>
+#include <net/if.h>
+#include <sys/ioctl.h>
+#include <inttypes.h>
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vlib/pci/pci.h>
+#include <vnet/ethernet/ethernet.h>
+
+#include <rdma/rdma.h>
+
+static clib_error_t *
+rdma_create_command_fn (vlib_main_t * vm, unformat_input_t * input,
+			vlib_cli_command_t * cmd)
+{
+  unformat_input_t _line_input, *line_input = &_line_input;
+  rdma_create_if_args_t args;
+
+  clib_memset (&args, 0, sizeof (rdma_create_if_args_t));
+
+  /* Get a line of input. */
+  if (!unformat_user (input, unformat_line_input, line_input))
+    return 0;
+
+  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (line_input, "name %s", &args.ifname))
+	;
+      else
+	return clib_error_return (0, "unknown input `%U'",
+				  format_unformat_error, input);
+    }
+  unformat_free (line_input);
+
+  rdma_create_if (vm, &args);
+
+  vec_free (args.ifname);
+
+  return args.error;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (rdma_create_command, static) = {
+  .path = "create interface rdma",
+  .short_help = "create interface rdma <name ifname>",
+  .function = rdma_create_command_fn,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+rdma_delete_command_fn (vlib_main_t * vm, unformat_input_t * input,
+			vlib_cli_command_t * cmd)
+{
+  unformat_input_t _line_input, *line_input = &_line_input;
+  u32 sw_if_index = ~0;
+  vnet_hw_interface_t *hw;
+  rdma_main_t *rm = &rdma_main;
+  rdma_device_t *rd;
+  vnet_main_t *vnm = vnet_get_main ();
+
+  /* Get a line of input. */
+  if (!unformat_user (input, unformat_line_input, line_input))
+    return 0;
+
+  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (line_input, "sw_if_index %d", &sw_if_index))
+	;
+      else if (unformat (line_input, "%U", unformat_vnet_sw_interface,
+			 vnm, &sw_if_index))
+	;
+      else
+	return clib_error_return (0, "unknown input `%U'",
+				  format_unformat_error, input);
+    }
+  unformat_free (line_input);
+
+  if (sw_if_index == ~0)
+    return clib_error_return (0,
+			      "please specify interface name or sw_if_index");
+
+  hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
+  if (hw == NULL || rdma_device_class.index != hw->dev_class_index)
+    return clib_error_return (0, "not an AVF interface");
+
+  rd = pool_elt_at_index (rm->devices, hw->dev_instance);
+
+  rdma_delete_if (vm, rd);
+
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (rdma_delete_command, static) = {
+  .path = "delete interface rdma",
+  .short_help = "delete interface rdma "
+    "{<interface> | sw_if_index <sw_idx>}",
+  .function = rdma_delete_command_fn,
+};
+/* *INDENT-ON* */
+
+clib_error_t *
+rdma_cli_init (vlib_main_t * vm)
+{
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (rdma_cli_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */