--- /dev/null
+/*
+ *------------------------------------------------------------------
+ * 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>
+
+netmap_main_t netmap_main;
+
+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 (clib_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->clib_file_index != ~0)
+ {
+ clib_file_del (&file_main, file_main.file_pool + nif->clib_file_index);
+ nif->clib_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);
+
+ clib_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->clib_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)
+ clib_spinlock_init (&nif->lockp);
+
+ {
+ clib_file_t template = { 0 };
+ template.read_function = netmap_fd_read_ready;
+ template.file_descriptor = nif->fd;
+ template.private_data = nif->if_index;
+ nif->clib_file_index = clib_file_add (&file_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;
+
+ clib_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:
+ */
Code Review / vpp.git / blobdiff