Reorganize source tree to use single autotools instance

Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23
Signed-off-by: Damjan Marion <damarion@cisco.com>

1 files changed, 316 insertions, 0 deletions

diff --git a/src/vnet/devices/netmap/netmap.c b/src/vnet/devices/netmap/netmap.c
new file mode 100644
index 00000000000..3bdb442dda2
--- /dev/null
+++ b/src/vnet/devices/netmap/netmap.c
@@ -0,0 +1,316 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2016 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 <sys/types.h>
+#include <fcntl.h>
+#include <vnet/devices/netmap/net_netmap.h>
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/devices/netmap/netmap.h>
+
+static u32
+netmap_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi,
+			u32 flags)
+{
+  /* nothing for now */
+  return 0;
+}
+
+static clib_error_t *
+netmap_fd_read_ready (unix_file_t * uf)
+{
+  vlib_main_t *vm = vlib_get_main ();
+  netmap_main_t *nm = &netmap_main;
+  u32 idx = uf->private_data;
+
+  nm->pending_input_bitmap =
+    clib_bitmap_set (nm->pending_input_bitmap, idx, 1);
+
+  /* Schedule the rx node */
+  vlib_node_set_interrupt_pending (vm, netmap_input_node.index);
+
+  return 0;
+}
+
+static void
+close_netmap_if (netmap_main_t * nm, netmap_if_t * nif)
+{
+  if (nif->unix_file_index != ~0)
+    {
+      unix_file_del (&unix_main, unix_main.file_pool + nif->unix_file_index);
+      nif->unix_file_index = ~0;
+    }
+  else if (nif->fd > -1)
+    close (nif->fd);
+
+  if (nif->mem_region)
+    {
+      netmap_mem_region_t *reg = &nm->mem_regions[nif->mem_region];
+      if (--reg->refcnt == 0)
+	{
+	  munmap (reg->mem, reg->region_size);
+	  reg->region_size = 0;
+	}
+    }
+
+
+  mhash_unset (&nm->if_index_by_host_if_name, nif->host_if_name,
+	       &nif->if_index);
+  vec_free (nif->host_if_name);
+  vec_free (nif->req);
+
+  memset (nif, 0, sizeof (*nif));
+  pool_put (nm->interfaces, nif);
+}
+
+int
+netmap_worker_thread_enable ()
+{
+  /* if worker threads are enabled, switch to polling mode */
+  foreach_vlib_main ((
+		       {
+		       vlib_node_set_state (this_vlib_main,
+					    netmap_input_node.index,
+					    VLIB_NODE_STATE_POLLING);
+		       }));
+
+  return 0;
+}
+
+int
+netmap_worker_thread_disable ()
+{
+  foreach_vlib_main ((
+		       {
+		       vlib_node_set_state (this_vlib_main,
+					    netmap_input_node.index,
+					    VLIB_NODE_STATE_INTERRUPT);
+		       }));
+
+  return 0;
+}
+
+int
+netmap_create_if (vlib_main_t * vm, u8 * if_name, u8 * hw_addr_set,
+		  u8 is_pipe, u8 is_master, u32 * sw_if_index)
+{
+  netmap_main_t *nm = &netmap_main;
+  int ret = 0;
+  netmap_if_t *nif = 0;
+  u8 hw_addr[6];
+  clib_error_t *error = 0;
+  vnet_sw_interface_t *sw;
+  vnet_main_t *vnm = vnet_get_main ();
+  uword *p;
+  struct nmreq *req = 0;
+  netmap_mem_region_t *reg;
+  vlib_thread_main_t *tm = vlib_get_thread_main ();
+  int fd;
+
+  p = mhash_get (&nm->if_index_by_host_if_name, if_name);
+  if (p)
+    return VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
+
+  fd = open ("/dev/netmap", O_RDWR);
+  if (fd < 0)
+    return VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
+
+  pool_get (nm->interfaces, nif);
+  nif->if_index = nif - nm->interfaces;
+  nif->fd = fd;
+  nif->unix_file_index = ~0;
+
+  vec_validate (req, 0);
+  nif->req = req;
+  req->nr_version = NETMAP_API;
+  req->nr_flags = NR_REG_ALL_NIC;
+
+  if (is_pipe)
+    req->nr_flags = is_master ? NR_REG_PIPE_MASTER : NR_REG_PIPE_SLAVE;
+  else
+    req->nr_flags = NR_REG_ALL_NIC;
+
+  req->nr_flags |= NR_ACCEPT_VNET_HDR;
+  snprintf (req->nr_name, IFNAMSIZ, "%s", if_name);
+  req->nr_name[IFNAMSIZ - 1] = 0;
+
+  if (ioctl (nif->fd, NIOCREGIF, req))
+    {
+      ret = VNET_API_ERROR_NOT_CONNECTED;
+      goto error;
+    }
+
+  nif->mem_region = req->nr_arg2;
+  vec_validate (nm->mem_regions, nif->mem_region);
+  reg = &nm->mem_regions[nif->mem_region];
+  if (reg->region_size == 0)
+    {
+      reg->mem = mmap (NULL, req->nr_memsize, PROT_READ | PROT_WRITE,
+		       MAP_SHARED, fd, 0);
+      clib_warning ("mem %p", reg->mem);
+      if (reg->mem == MAP_FAILED)
+	{
+	  ret = VNET_API_ERROR_NOT_CONNECTED;
+	  goto error;
+	}
+      reg->region_size = req->nr_memsize;
+    }
+  reg->refcnt++;
+
+  nif->nifp = NETMAP_IF (reg->mem, req->nr_offset);
+  nif->first_rx_ring = 0;
+  nif->last_rx_ring = 0;
+  nif->first_tx_ring = 0;
+  nif->last_tx_ring = 0;
+  nif->host_if_name = if_name;
+  nif->per_interface_next_index = ~0;
+
+  if (tm->n_vlib_mains > 1)
+    {
+      nif->lockp = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
+					   CLIB_CACHE_LINE_BYTES);
+      memset ((void *) nif->lockp, 0, CLIB_CACHE_LINE_BYTES);
+    }
+
+  {
+    unix_file_t template = { 0 };
+    template.read_function = netmap_fd_read_ready;
+    template.file_descriptor = nif->fd;
+    template.private_data = nif->if_index;
+    nif->unix_file_index = unix_file_add (&unix_main, &template);
+  }
+
+  /*use configured or generate random MAC address */
+  if (hw_addr_set)
+    memcpy (hw_addr, hw_addr_set, 6);
+  else
+    {
+      f64 now = vlib_time_now (vm);
+      u32 rnd;
+      rnd = (u32) (now * 1e6);
+      rnd = random_u32 (&rnd);
+
+      memcpy (hw_addr + 2, &rnd, sizeof (rnd));
+      hw_addr[0] = 2;
+      hw_addr[1] = 0xfe;
+    }
+
+  error = ethernet_register_interface (vnm, netmap_device_class.index,
+				       nif->if_index, hw_addr,
+				       &nif->hw_if_index,
+				       netmap_eth_flag_change);
+
+  if (error)
+    {
+      clib_error_report (error);
+      ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+      goto error;
+    }
+
+  sw = vnet_get_hw_sw_interface (vnm, nif->hw_if_index);
+  nif->sw_if_index = sw->sw_if_index;
+
+  mhash_set_mem (&nm->if_index_by_host_if_name, if_name, &nif->if_index, 0);
+
+  if (sw_if_index)
+    *sw_if_index = nif->sw_if_index;
+
+  if (tm->n_vlib_mains > 1 && pool_elts (nm->interfaces) == 1)
+    netmap_worker_thread_enable ();
+
+  return 0;
+
+error:
+  close_netmap_if (nm, nif);
+  return ret;
+}
+
+int
+netmap_delete_if (vlib_main_t * vm, u8 * host_if_name)
+{
+  vnet_main_t *vnm = vnet_get_main ();
+  netmap_main_t *nm = &netmap_main;
+  netmap_if_t *nif;
+  uword *p;
+  vlib_thread_main_t *tm = vlib_get_thread_main ();
+
+  p = mhash_get (&nm->if_index_by_host_if_name, host_if_name);
+  if (p == NULL)
+    {
+      clib_warning ("Host interface %s does not exist", host_if_name);
+      return VNET_API_ERROR_SYSCALL_ERROR_1;
+    }
+  nif = pool_elt_at_index (nm->interfaces, p[0]);
+
+  /* bring down the interface */
+  vnet_hw_interface_set_flags (vnm, nif->hw_if_index, 0);
+
+  ethernet_delete_interface (vnm, nif->hw_if_index);
+
+  close_netmap_if (nm, nif);
+
+  if (tm->n_vlib_mains > 1 && pool_elts (nm->interfaces) == 0)
+    netmap_worker_thread_disable ();
+
+  return 0;
+}
+
+static clib_error_t *
+netmap_init (vlib_main_t * vm)
+{
+  netmap_main_t *nm = &netmap_main;
+  vlib_thread_main_t *tm = vlib_get_thread_main ();
+  vlib_thread_registration_t *tr;
+  uword *p;
+
+  memset (nm, 0, sizeof (netmap_main_t));
+
+  nm->input_cpu_first_index = 0;
+  nm->input_cpu_count = 1;
+
+  /* find out which cpus will be used for input */
+  p = hash_get_mem (tm->thread_registrations_by_name, "workers");
+  tr = p ? (vlib_thread_registration_t *) p[0] : 0;
+
+  if (tr && tr->count > 0)
+    {
+      nm->input_cpu_first_index = tr->first_index;
+      nm->input_cpu_count = tr->count;
+    }
+
+  mhash_init_vec_string (&nm->if_index_by_host_if_name, sizeof (uword));
+
+  vec_validate_aligned (nm->rx_buffers, tm->n_vlib_mains - 1,
+			CLIB_CACHE_LINE_BYTES);
+
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (netmap_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */