rdma: add rdma API

Type: feature

Change-Id: I590612989cb3c114f8d99227ad36c3434e998597
Signed-off-by: Benoît Ganne <bganne@cisco.com>

8 files changed, 401 insertions, 29 deletions

diff --git a/src/plugins/rdma/CMakeLists.txt b/src/plugins/rdma/CMakeLists.txt
index 432330dc55d..eaf747db54f 100644
--- a/src/plugins/rdma/CMakeLists.txt
+++ b/src/plugins/rdma/CMakeLists.txt
@@ -43,10 +43,12 @@ include_directories(${IBVERBS_INCLUDE_DIR})
 
 add_vpp_plugin(rdma
   SOURCES
+  api.c
   cli.c
   device.c
   format.c
   plugin.c
+  unformat.c
   input.c
   output.c
 
@@ -54,6 +56,13 @@ add_vpp_plugin(rdma
   input.c
   output.c
 
+  API_FILES
+  rdma.api
+
+  API_TEST_SOURCES
+  unformat.c
+  test_api.c
+
   LINK_FLAGS
   "${RDMA_LINK_FLAGS}"
 
diff --git a/src/plugins/rdma/api.c b/src/plugins/rdma/api.c
new file mode 100644
index 00000000000..cd3c36065f2
--- /dev/null
+++ b/src/plugins/rdma/api.c
@@ -0,0 +1,108 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2019 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 <vnet/vnet.h>
+
+#include <rdma/rdma.h>
+
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+
+/* define message IDs */
+#include <rdma/rdma.api_enum.h>
+#include <rdma/rdma.api_types.h>
+
+#include <vlibapi/api_helper_macros.h>
+
+static void
+vl_api_rdma_create_t_handler (vl_api_rdma_create_t * mp)
+{
+  vlib_main_t *vm = vlib_get_main ();
+  rdma_main_t *rm = &rdma_main;
+  vl_api_rdma_create_reply_t *rmp;
+  rdma_create_if_args_t args;
+  int rv;
+
+  clib_memset (&args, 0, sizeof (rdma_create_if_args_t));
+
+  args.ifname = mp->host_if;
+  args.name = mp->name;
+  args.rxq_num = ntohs (mp->rxq_num);
+  args.rxq_size = ntohs (mp->rxq_size);
+  args.txq_size = ntohs (mp->txq_size);
+
+  rdma_create_if (vm, &args);
+  rv = args.rv;
+
+  /* *INDENT-OFF* */
+  REPLY_MACRO2 (VL_API_RDMA_CREATE_REPLY + rm->msg_id_base,
+    ({
+      rmp->sw_if_index = ntohl (args.sw_if_index);
+    }));
+  /* *INDENT-ON* */
+}
+
+static void
+vl_api_rdma_delete_t_handler (vl_api_rdma_delete_t * mp)
+{
+  vlib_main_t *vm = vlib_get_main ();
+  vnet_main_t *vnm = vnet_get_main ();
+  rdma_main_t *rm = &rdma_main;
+  vl_api_rdma_delete_reply_t *rmp;
+  rdma_device_t *rd;
+  vnet_hw_interface_t *hw;
+  int rv = 0;
+
+  hw =
+    vnet_get_sup_hw_interface_api_visible_or_null (vnm,
+						   htonl (mp->sw_if_index));
+  if (hw == NULL || rdma_device_class.index != hw->dev_class_index)
+    {
+      rv = VNET_API_ERROR_INVALID_INTERFACE;
+      goto reply;
+    }
+
+  rd = pool_elt_at_index (rm->devices, hw->dev_instance);
+
+  rdma_delete_if (vm, rd);
+
+reply:
+  REPLY_MACRO (VL_API_RDMA_DELETE_REPLY + rm->msg_id_base);
+}
+
+/* set tup the API message handling tables */
+#include <rdma/rdma.api.c>
+static clib_error_t *
+rdma_plugin_api_hookup (vlib_main_t * vm)
+{
+  rdma_main_t *rm = &rdma_main;
+
+  /* ask for a correctly-sized block of API message decode slots */
+  rm->msg_id_base = setup_message_id_table ();
+  return 0;
+}
+
+VLIB_API_INIT_FUNCTION (rdma_plugin_api_hookup);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/plugins/rdma/cli.c b/src/plugins/rdma/cli.c
index d4ef17d020c..3f39cfeb66b 100644
--- a/src/plugins/rdma/cli.c
+++ b/src/plugins/rdma/cli.c
@@ -30,32 +30,11 @@ 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;
 
-  /* Get a line of input. */
-  if (!unformat_user (input, unformat_line_input, line_input))
-    return 0;
-
-  clib_memset (&args, 0, sizeof (rdma_create_if_args_t));
-
-  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
-    {
-      if (unformat (line_input, "host-if %s", &args.ifname))
-	;
-      else if (unformat (line_input, "name %s", &args.name))
-	;
-      else if (unformat (line_input, "rx-queue-size %u", &args.rxq_size))
-	;
-      else if (unformat (line_input, "tx-queue-size %u", &args.txq_size))
-	;
-      else if (unformat (line_input, "num-rx-queues %u", &args.rxq_num))
-	;
-      else
-	return clib_error_return (0, "unknown input `%U'",
-				  format_unformat_error, input);
-    }
-  unformat_free (line_input);
+  if (!unformat_user (input, unformat_rdma_create_if_args, &args))
+    return clib_error_return (0, "unknown input `%U'",
+			      format_unformat_error, input);
 
   rdma_create_if (vm, &args);
 
diff --git a/src/plugins/rdma/format.c b/src/plugins/rdma/format.c
index 7a97339746f..c9553b21e41 100644
--- a/src/plugins/rdma/format.c
+++ b/src/plugins/rdma/format.c
@@ -16,10 +16,7 @@
  */
 
 #include <vlib/vlib.h>
-#include <vlib/unix/unix.h>
-#include <vlib/pci/pci.h>
-#include <vnet/ethernet/ethernet.h>
-
+#include <vnet/vnet.h>
 #include <rdma/rdma.h>
 
 u8 *
diff --git a/src/plugins/rdma/rdma.api b/src/plugins/rdma/rdma.api
new file mode 100644
index 00000000000..f04eee2456e
--- /dev/null
+++ b/src/plugins/rdma/rdma.api
@@ -0,0 +1,75 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2019 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.
+ *------------------------------------------------------------------
+ */
+
+option version = "1.0.0";
+
+/** \brief
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param host_if - Linux netdev interface name
+    @param name - new rdma interface name
+    @param rxq_num - number of receive queues
+    @param rxq_size - receive queue size
+    @param txq_size - transmit queue size
+*/
+
+define rdma_create
+{
+  u32 client_index;
+  u32 context;
+
+  string host_if[64];
+  string name[64];
+  u16 rxq_num;
+  u16 rxq_size;
+  u16 txq_size;
+  option vat_help = "<host-if ifname> [name <name>] [rx-queue-size <size>] [tx-queue-size <size>] [num-rx-queues <size>]";
+};
+
+/** \brief
+    @param context - sender context, to match reply w/ request
+    @param retval - return value for request
+    @param sw_if_index - software index for the new rdma interface
+*/
+
+define rdma_create_reply
+{
+  u32 context;
+  i32 retval;
+  u32 sw_if_index;
+};
+
+/** \brief
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param sw_if_index - interface index
+*/
+
+autoreply define rdma_delete
+{
+  u32 client_index;
+  u32 context;
+
+  u32 sw_if_index;
+  option vat_help = "<sw_if_index index>";
+};
+
+/*
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/plugins/rdma/rdma.h b/src/plugins/rdma/rdma.h
index 0aae4985276..6e602cb31df 100644
--- a/src/plugins/rdma/rdma.h
+++ b/src/plugins/rdma/rdma.h
@@ -20,6 +20,9 @@
 
 #include <infiniband/verbs.h>
 #include <vlib/log.h>
+#include <vlib/pci/pci.h>
+#include <vnet/interface.h>
+#include <vnet/ethernet/mac_address.h>
 
 #define foreach_rdma_device_flags \
   _(0, ERROR, "error") \
@@ -94,6 +97,7 @@ typedef struct
 {
   rdma_device_t *devices;
   vlib_log_class_t log_class;
+  u16 msg_id_base;
 } rdma_main_t;
 
 extern rdma_main_t rdma_main;
@@ -118,10 +122,10 @@ void rdma_delete_if (vlib_main_t * vm, rdma_device_t * rd);
 extern vlib_node_registration_t rdma_input_node;
 extern vnet_device_class_t rdma_device_class;
 
-/* format.c */
 format_function_t format_rdma_device;
 format_function_t format_rdma_device_name;
 format_function_t format_rdma_input_trace;
+unformat_function_t unformat_rdma_create_if_args;
 
 typedef struct
 {
diff --git a/src/plugins/rdma/test_api.c b/src/plugins/rdma/test_api.c
new file mode 100644
index 00000000000..cfd65c029c2
--- /dev/null
+++ b/src/plugins/rdma/test_api.c
@@ -0,0 +1,137 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2019 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 <vat/vat.h>
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+
+#include <vppinfra/error.h>
+#include <rdma/rdma.h>
+
+#define __plugin_msg_base rdma_test_main.msg_id_base
+#include <vlibapi/vat_helper_macros.h>
+
+/* declare message IDs */
+#include <rdma/rdma.api_enum.h>
+#include <rdma/rdma.api_types.h>
+
+typedef struct
+{
+  /* API message ID base */
+  u16 msg_id_base;
+  vat_main_t *vat_main;
+} rdma_test_main_t;
+
+rdma_test_main_t rdma_test_main;
+
+/* rdma create API */
+static int
+api_rdma_create (vat_main_t * vam)
+{
+  vl_api_rdma_create_t *mp;
+  rdma_create_if_args_t args;
+  int ret;
+
+  if (!unformat_user (vam->input, unformat_rdma_create_if_args, &args))
+    {
+      clib_warning ("unknown input `%U'", format_unformat_error, vam->input);
+      return -99;
+    }
+
+  M (RDMA_CREATE, mp);
+
+  snprintf ((char *) mp->host_if, sizeof (mp->host_if), "%s", args.ifname);
+  snprintf ((char *) mp->name, sizeof (mp->name), "%s", args.name);
+  mp->rxq_num = clib_host_to_net_u16 (args.rxq_num);
+  mp->rxq_size = clib_host_to_net_u16 (args.rxq_size);
+  mp->txq_size = clib_host_to_net_u16 (args.txq_size);
+
+  S (mp);
+  W (ret);
+
+  return ret;
+}
+
+/* rdma-create reply handler */
+static void
+vl_api_rdma_create_reply_t_handler (vl_api_rdma_create_reply_t * mp)
+{
+  vat_main_t *vam = rdma_test_main.vat_main;
+  i32 retval = ntohl (mp->retval);
+
+  if (retval == 0)
+    {
+      fformat (vam->ofp, "created rdma with sw_if_index %d\n",
+	       ntohl (mp->sw_if_index));
+    }
+
+  vam->retval = retval;
+  vam->result_ready = 1;
+  vam->regenerate_interface_table = 1;
+}
+
+/* rdma delete API */
+static int
+api_rdma_delete (vat_main_t * vam)
+{
+  unformat_input_t *i = vam->input;
+  vl_api_rdma_delete_t *mp;
+  u32 sw_if_index = 0;
+  u8 index_defined = 0;
+  int ret;
+
+  while (unformat_check_input (i) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (i, "sw_if_index %u", &sw_if_index))
+	index_defined = 1;
+      else
+	{
+	  clib_warning ("unknown input '%U'", format_unformat_error, i);
+	  return -99;
+	}
+    }
+
+  if (!index_defined)
+    {
+      errmsg ("missing sw_if_index\n");
+      return -99;
+    }
+
+  M (RDMA_DELETE, mp);
+
+  mp->sw_if_index = clib_host_to_net_u32 (sw_if_index);
+
+  S (mp);
+  W (ret);
+
+  return ret;
+}
+
+#include <rdma/rdma.api_test.c>
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/plugins/rdma/unformat.c b/src/plugins/rdma/unformat.c
new file mode 100644
index 00000000000..0b4a1212500
--- /dev/null
+++ b/src/plugins/rdma/unformat.c
@@ -0,0 +1,63 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2019 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 <rdma/rdma.h>
+
+uword
+unformat_rdma_create_if_args (unformat_input_t * input, va_list * vargs)
+{
+  rdma_create_if_args_t *args = va_arg (*vargs, rdma_create_if_args_t *);
+  unformat_input_t _line_input, *line_input = &_line_input;
+  uword ret = 1;
+
+  if (!unformat_user (input, unformat_line_input, line_input))
+    return 0;
+
+  clib_memset (args, 0, sizeof (*args));
+
+  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (line_input, "host-if %s", &args->ifname))
+	;
+      else if (unformat (line_input, "name %s", &args->name))
+	;
+      else if (unformat (line_input, "rx-queue-size %u", &args->rxq_size))
+	;
+      else if (unformat (line_input, "tx-queue-size %u", &args->txq_size))
+	;
+      else if (unformat (line_input, "num-rx-queues %u", &args->rxq_num))
+	;
+      else
+	{
+	  /* return failure on unknown input */
+	  ret = 0;
+	  break;
+	}
+    }
+
+  unformat_free (line_input);
+  return ret;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */