--- /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 <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vnet/ethernet/ethernet.h>
+
+#include <vnet/devices/netmap/net_netmap.h>
+#include <vnet/devices/netmap/netmap.h>
+
+#define foreach_netmap_tx_func_error \
+_(NO_FREE_SLOTS, "no free tx slots") \
+_(PENDING_MSGS, "pending msgs in tx ring")
+
+typedef enum
+{
+#define _(f,s) NETMAP_TX_ERROR_##f,
+ foreach_netmap_tx_func_error
+#undef _
+ NETMAP_TX_N_ERROR,
+} netmap_tx_func_error_t;
+
+static char *netmap_tx_func_error_strings[] = {
+#define _(n,s) s,
+ foreach_netmap_tx_func_error
+#undef _
+};
+
+
+static u8 *
+format_netmap_device_name (u8 * s, va_list * args)
+{
+ u32 i = va_arg (*args, u32);
+ netmap_main_t *apm = &netmap_main;
+ netmap_if_t *nif = pool_elt_at_index (apm->interfaces, i);
+
+ s = format (s, "netmap-%s", nif->host_if_name);
+ return s;
+}
+
+static u8 *
+format_netmap_device (u8 * s, va_list * args)
+{
+ u32 dev_instance = va_arg (*args, u32);
+ int verbose = va_arg (*args, int);
+ netmap_main_t *nm = &netmap_main;
+ netmap_if_t *nif = vec_elt_at_index (nm->interfaces, dev_instance);
+ u32 indent = format_get_indent (s);
+
+ s = format (s, "NETMAP interface");
+ if (verbose)
+ {
+ s = format (s, "\n%U version %d flags 0x%x"
+ "\n%U region %u memsize 0x%x offset 0x%x"
+ "\n%U tx_slots %u rx_slots %u tx_rings %u rx_rings %u",
+ format_white_space, indent + 2,
+ nif->req->nr_version,
+ nif->req->nr_flags,
+ format_white_space, indent + 2,
+ nif->mem_region,
+ nif->req->nr_memsize,
+ nif->req->nr_offset,
+ format_white_space, indent + 2,
+ nif->req->nr_tx_slots,
+ nif->req->nr_rx_slots,
+ nif->req->nr_tx_rings, nif->req->nr_rx_rings);
+ }
+ return s;
+}
+
+static u8 *
+format_netmap_tx_trace (u8 * s, va_list * args)
+{
+ s = format (s, "Unimplemented...");
+ return s;
+}
+
+VNET_DEVICE_CLASS_TX_FN (netmap_device_class) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ netmap_main_t *nm = &netmap_main;
+ u32 *buffers = vlib_frame_vector_args (frame);
+ u32 n_left = frame->n_vectors;
+ f64 const time_constant = 1e3;
+ vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
+ netmap_if_t *nif = pool_elt_at_index (nm->interfaces, rd->dev_instance);
+ int cur_ring;
+
+ clib_spinlock_lock_if_init (&nif->lockp);
+
+ cur_ring = nif->first_tx_ring;
+
+ while (n_left && cur_ring <= nif->last_tx_ring)
+ {
+ struct netmap_ring *ring = NETMAP_TXRING (nif->nifp, cur_ring);
+ int n_free_slots = nm_ring_space (ring);
+ uint cur = ring->cur;
+
+ if (nm_tx_pending (ring))
+ {
+ if (ioctl (nif->fd, NIOCTXSYNC, NULL) < 0)
+ clib_unix_warning ("NIOCTXSYNC");
+ clib_cpu_time_wait (time_constant);
+
+ if (nm_tx_pending (ring) && !n_free_slots)
+ {
+ cur_ring++;
+ continue;
+ }
+ }
+
+ while (n_left && n_free_slots)
+ {
+ vlib_buffer_t *b0 = 0;
+ u32 bi = buffers[0];
+ u32 len;
+ u32 offset = 0;
+ buffers++;
+
+ struct netmap_slot *slot = &ring->slot[cur];
+
+ do
+ {
+ b0 = vlib_get_buffer (vm, bi);
+ len = b0->current_length;
+ /* memcpy */
+ clib_memcpy_fast ((u8 *) NETMAP_BUF (ring, slot->buf_idx) +
+ offset, vlib_buffer_get_current (b0), len);
+ offset += len;
+ }
+ while ((bi = b0->next_buffer));
+
+ slot->len = offset;
+ cur = (cur + 1) % ring->num_slots;
+ n_free_slots--;
+ n_left--;
+ }
+ CLIB_MEMORY_BARRIER ();
+ ring->head = ring->cur = cur;
+ }
+
+ if (n_left < frame->n_vectors)
+ ioctl (nif->fd, NIOCTXSYNC, NULL);
+
+ clib_spinlock_unlock_if_init (&nif->lockp);
+
+ if (n_left)
+ vlib_error_count (vm, node->node_index,
+ (n_left ==
+ frame->n_vectors ? NETMAP_TX_ERROR_PENDING_MSGS :
+ NETMAP_TX_ERROR_NO_FREE_SLOTS), n_left);
+
+ vlib_buffer_free (vm, vlib_frame_vector_args (frame), frame->n_vectors);
+ return frame->n_vectors;
+}
+
+static void
+netmap_set_interface_next_node (vnet_main_t * vnm, u32 hw_if_index,
+ u32 node_index)
+{
+ netmap_main_t *apm = &netmap_main;
+ vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
+ netmap_if_t *nif = pool_elt_at_index (apm->interfaces, hw->dev_instance);
+
+ /* Shut off redirection */
+ if (node_index == ~0)
+ {
+ nif->per_interface_next_index = node_index;
+ return;
+ }
+
+ nif->per_interface_next_index =
+ vlib_node_add_next (vlib_get_main (), netmap_input_node.index,
+ node_index);
+}
+
+static void
+netmap_clear_hw_interface_counters (u32 instance)
+{
+ /* Nothing for now */
+}
+
+static clib_error_t *
+netmap_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
+{
+ netmap_main_t *apm = &netmap_main;
+ vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
+ netmap_if_t *nif = pool_elt_at_index (apm->interfaces, hw->dev_instance);
+ u32 hw_flags;
+
+ nif->is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
+
+ if (nif->is_admin_up)
+ hw_flags = VNET_HW_INTERFACE_FLAG_LINK_UP;
+ else
+ hw_flags = 0;
+
+ vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags);
+
+ return 0;
+}
+
+static clib_error_t *
+netmap_subif_add_del_function (vnet_main_t * vnm,
+ u32 hw_if_index,
+ struct vnet_sw_interface_t *st, int is_add)
+{
+ /* Nothing for now */
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VNET_DEVICE_CLASS (netmap_device_class) = {
+ .name = "netmap",
+ .format_device_name = format_netmap_device_name,
+ .format_device = format_netmap_device,
+ .format_tx_trace = format_netmap_tx_trace,
+ .tx_function_n_errors = NETMAP_TX_N_ERROR,
+ .tx_function_error_strings = netmap_tx_func_error_strings,
+ .rx_redirect_to_node = netmap_set_interface_next_node,
+ .clear_counters = netmap_clear_hw_interface_counters,
+ .admin_up_down_function = netmap_interface_admin_up_down,
+ .subif_add_del_function = netmap_subif_add_del_function,
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff