virtio: Native virtio driver

Change-Id: Id7fccf2f805e578fb05032aeb2b649a74c3c0e56
Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>

1 files changed, 237 insertions, 0 deletions

diff --git a/src/vnet/devices/virtio/virtio_api.c b/src/vnet/devices/virtio/virtio_api.c
new file mode 100644
index 00000000000..6f70b090034
--- /dev/null
+++ b/src/vnet/devices/virtio/virtio_api.c
@@ -0,0 +1,237 @@
+/*
+ *------------------------------------------------------------------
+ * virtio_api.c - vnet virtio pci device driver API support
+ *
+ * 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 <vnet/vnet.h>
+#include <vlibmemory/api.h>
+
+#include <vnet/interface.h>
+#include <vnet/api_errno.h>
+#include <vnet/ip/ip.h>
+#include <vnet/devices/virtio/virtio.h>
+#include <vnet/devices/virtio/pci.h>
+
+#include <vnet/vnet_msg_enum.h>
+
+#define vl_typedefs		/* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_typedefs
+
+#define vl_endianfun		/* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
+#define vl_printfun
+#include <vnet/vnet_all_api_h.h>
+#undef vl_printfun
+
+#include <vlibapi/api_helper_macros.h>
+
+#define foreach_virtio_pci_api_msg                        \
+_(VIRTIO_PCI_CREATE, virtio_pci_create)                   \
+_(VIRTIO_PCI_DELETE, virtio_pci_delete)                   \
+_(SW_INTERFACE_VIRTIO_PCI_DUMP, sw_interface_virtio_pci_dump)
+
+static void
+vl_api_virtio_pci_create_t_handler (vl_api_virtio_pci_create_t * mp)
+{
+  vlib_main_t *vm = vlib_get_main ();
+  vl_api_virtio_pci_create_reply_t *rmp;
+  vl_api_registration_t *reg;
+  virtio_pci_create_if_args_t _a, *ap = &_a;
+
+  clib_memset (ap, 0, sizeof (*ap));
+
+  ap->addr = ntohl (mp->pci_addr);
+  if (!mp->use_random_mac)
+    {
+      clib_memcpy (ap->mac_addr, mp->mac_address, 6);
+      ap->mac_addr_set = 1;
+    }
+  ap->rxq_size = ntohs (mp->rx_ring_sz);
+  ap->txq_size = ntohs (mp->tx_ring_sz);
+  ap->sw_if_index = (u32) ~ 0;
+  ap->features = clib_net_to_host_u64 (mp->features);
+
+  virtio_pci_create_if (vm, ap);
+
+  reg = vl_api_client_index_to_registration (mp->client_index);
+  if (!reg)
+    return;;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  rmp->_vl_msg_id = htons (VL_API_VIRTIO_PCI_CREATE_REPLY);
+  rmp->context = mp->context;
+  rmp->retval = htonl (ap->rv);
+  rmp->sw_if_index = htonl (ap->sw_if_index);
+
+  vl_api_send_msg (reg, (u8 *) rmp);
+}
+
+static void
+virtio_pci_send_sw_interface_event_deleted (vpe_api_main_t * am,
+					    vl_api_registration_t * reg,
+					    u32 sw_if_index)
+{
+  vl_api_sw_interface_event_t *mp;
+
+  mp = vl_msg_api_alloc (sizeof (*mp));
+  clib_memset (mp, 0, sizeof (*mp));
+  mp->_vl_msg_id = htons (VL_API_SW_INTERFACE_EVENT);
+  mp->sw_if_index = htonl (sw_if_index);
+
+  mp->admin_up_down = 0;
+  mp->link_up_down = 0;
+  mp->deleted = 1;
+  vl_api_send_msg (reg, (u8 *) mp);
+}
+
+static void
+vl_api_virtio_pci_delete_t_handler (vl_api_virtio_pci_delete_t * mp)
+{
+  vnet_main_t *vnm = vnet_get_main ();
+  vlib_main_t *vm = vlib_get_main ();
+  virtio_main_t *vmx = &virtio_main;
+  int rv = 0;
+  vnet_hw_interface_t *hw;
+  virtio_if_t *vif;
+  vpe_api_main_t *vam = &vpe_api_main;
+  vl_api_virtio_pci_delete_reply_t *rmp;
+  vl_api_registration_t *reg;
+  u32 sw_if_index = ntohl (mp->sw_if_index);
+
+  hw = vnet_get_sup_hw_interface (vnm, htonl (mp->sw_if_index));
+  if (hw == NULL || virtio_device_class.index != hw->dev_class_index)
+    {
+      rv = VNET_API_ERROR_INVALID_INTERFACE;
+      goto reply;
+    }
+
+  vif = pool_elt_at_index (vmx->interfaces, hw->dev_instance);
+
+  rv = virtio_pci_delete_if (vm, vif);
+
+reply:
+  reg = vl_api_client_index_to_registration (mp->client_index);
+  if (!reg)
+    return;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  rmp->_vl_msg_id = htons (VL_API_VIRTIO_PCI_DELETE_REPLY);
+  rmp->context = mp->context;
+  rmp->retval = htonl (rv);
+
+  vl_api_send_msg (reg, (u8 *) rmp);
+
+  if (!rv)
+    {
+      virtio_pci_send_sw_interface_event_deleted (vam, reg, sw_if_index);
+    }
+}
+
+static void
+virtio_pci_send_sw_interface_details (vpe_api_main_t * am,
+				      vl_api_registration_t * reg,
+				      virtio_if_t * vif, u32 context)
+{
+  vl_api_sw_interface_virtio_pci_details_t *mp;
+  mp = vl_msg_api_alloc (sizeof (*mp));
+
+  clib_memset (mp, 0, sizeof (*mp));
+
+  mp->_vl_msg_id = htons (VL_API_SW_INTERFACE_VIRTIO_PCI_DETAILS);
+  mp->pci_addr = htonl (vif->pci_addr.as_u32);
+  mp->sw_if_index = htonl (vif->sw_if_index);
+  mp->rx_ring_sz = htons (vif->rx_ring_sz);
+  mp->tx_ring_sz = htons (vif->tx_ring_sz);
+  clib_memcpy (mp->mac_addr, vif->mac_addr, 6);
+  mp->features = clib_host_to_net_u64 (vif->features);
+
+  mp->context = context;
+  vl_api_send_msg (reg, (u8 *) mp);
+}
+
+static void
+  vl_api_sw_interface_virtio_pci_dump_t_handler
+  (vl_api_sw_interface_virtio_pci_dump_t * mp)
+{
+  vpe_api_main_t *am = &vpe_api_main;
+  vl_api_registration_t *reg;
+  virtio_main_t *vmx = &virtio_main;
+  virtio_if_t *vif;
+
+  reg = vl_api_client_index_to_registration (mp->client_index);
+  if (!reg)
+    return;
+
+  pool_foreach (vif, vmx->interfaces, (
+					{
+					if (vif->type == VIRTIO_IF_TYPE_PCI)
+					{
+					virtio_pci_send_sw_interface_details
+					(am, reg, vif, mp->context);}
+					}
+		));
+}
+
+#define vl_msg_name_crc_list
+#include <vnet/vnet_all_api_h.h>
+#undef vl_msg_name_crc_list
+
+static void
+setup_message_id_table (api_main_t * am)
+{
+#define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
+  foreach_vl_msg_name_crc_virtio;
+#undef _
+}
+
+static clib_error_t *
+virtio_pci_api_hookup (vlib_main_t * vm)
+{
+  api_main_t *am = &api_main;
+
+#define _(N,n)                                                  \
+    vl_msg_api_set_handlers(VL_API_##N, #n,                     \
+                           vl_api_##n##_t_handler,              \
+                           vl_noop_handler,                     \
+                           vl_api_##n##_t_endian,               \
+                           vl_api_##n##_t_print,                \
+                           sizeof(vl_api_##n##_t), 1);
+  foreach_virtio_pci_api_msg;
+#undef _
+
+  /*
+   * Set up the (msg_name, crc, message-id) table
+   */
+  setup_message_id_table (am);
+
+  return 0;
+}
+
+VLIB_API_INIT_FUNCTION (virtio_pci_api_hookup);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */