dpdk: implement interrupt mode
[vpp.git] / src / plugins / dpdk / device / common.c
index c64f1d0..a837714 100644 (file)
 #include <vnet/vnet.h>
 #include <vppinfra/vec.h>
 #include <vppinfra/format.h>
-#include <vlib/unix/cj.h>
+#include <vppinfra/file.h>
+#include <vlib/unix/unix.h>
 #include <assert.h>
 
 #include <vnet/ip/ip.h>
 #include <vnet/ethernet/ethernet.h>
 #include <vnet/ethernet/arp_packet.h>
+#include <vnet/interface/rx_queue_funcs.h>
+#include <dpdk/buffer.h>
 #include <dpdk/device/dpdk.h>
-
 #include <dpdk/device/dpdk_priv.h>
 #include <vppinfra/error.h>
 
@@ -40,7 +42,9 @@ void
 dpdk_device_setup (dpdk_device_t * xd)
 {
   dpdk_main_t *dm = &dpdk_main;
+  vlib_main_t *vm = vlib_get_main ();
   vnet_main_t *vnm = vnet_get_main ();
+  vlib_thread_main_t *tm = vlib_get_thread_main ();
   vnet_sw_interface_t *sw = vnet_get_sw_interface (vnm, xd->sw_if_index);
   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, xd->hw_if_index);
   struct rte_eth_dev_info dev_info;
@@ -95,7 +99,8 @@ dpdk_device_setup (dpdk_device_t * xd)
       goto error;
     }
 
-  /* Set up one TX-queue per worker thread */
+  vec_validate_aligned (xd->tx_queues, xd->tx_q_used - 1,
+                       CLIB_CACHE_LINE_BYTES);
   for (j = 0; j < xd->tx_q_used; j++)
     {
       rv =
@@ -110,32 +115,30 @@ dpdk_device_setup (dpdk_device_t * xd)
                                  &xd->tx_conf);
       if (rv < 0)
        dpdk_device_error (xd, "rte_eth_tx_queue_setup", rv);
+
+      if (xd->tx_q_used < tm->n_vlib_mains)
+       clib_spinlock_init (&vec_elt (xd->tx_queues, j).lock);
     }
 
-  vec_validate_aligned (xd->buffer_pool_for_queue, xd->rx_q_used - 1,
+  vec_validate_aligned (xd->rx_queues, xd->rx_q_used - 1,
                        CLIB_CACHE_LINE_BYTES);
   for (j = 0; j < xd->rx_q_used; j++)
     {
-      dpdk_mempool_private_t *privp;
-      uword tidx = vnet_get_device_input_thread_index (dm->vnet_main,
-                                                      xd->hw_if_index, j);
-      unsigned lcore = vlib_worker_threads[tidx].lcore_id;
-      u16 socket_id = rte_lcore_to_socket_id (lcore);
+      dpdk_rx_queue_t *rxq = vec_elt_at_index (xd->rx_queues, j);
+      u8 bpidx = vlib_buffer_pool_get_default_for_numa (
+       vm, vnet_hw_if_get_rx_queue_numa_node (vnm, rxq->queue_index));
+      vlib_buffer_pool_t *bp = vlib_get_buffer_pool (vm, bpidx);
+      struct rte_mempool *mp = dpdk_mempool_by_buffer_pool_index[bpidx];
 
-      rv =
-       rte_eth_rx_queue_setup (xd->port_id, j, xd->nb_rx_desc,
-                               xd->cpu_socket, 0,
-                               dm->pktmbuf_pools[socket_id]);
+      rv = rte_eth_rx_queue_setup (xd->port_id, j, xd->nb_rx_desc,
+                                  xd->cpu_socket, 0, mp);
 
       /* retry with any other CPU socket */
       if (rv < 0)
-       rv =
-         rte_eth_rx_queue_setup (xd->port_id, j,
-                                 xd->nb_rx_desc, SOCKET_ID_ANY, 0,
-                                 dm->pktmbuf_pools[socket_id]);
+       rv = rte_eth_rx_queue_setup (xd->port_id, j, xd->nb_rx_desc,
+                                    SOCKET_ID_ANY, 0, mp);
 
-      privp = rte_mempool_get_priv (dm->pktmbuf_pools[socket_id]);
-      xd->buffer_pool_for_queue[j] = privp->buffer_pool_index;
+      rxq->buffer_pool_index = bp->index;
 
       if (rv < 0)
        dpdk_device_error (xd, "rte_eth_rx_queue_setup", rv);
@@ -159,6 +162,79 @@ error:
   sw->flags |= VNET_SW_INTERFACE_FLAG_ERROR;
 }
 
+static clib_error_t *
+dpdk_rx_read_ready (clib_file_t *uf)
+{
+  vnet_main_t *vnm = vnet_get_main ();
+  dpdk_main_t *dm = &dpdk_main;
+  u32 qidx = uf->private_data;
+  vnet_hw_if_rx_queue_t *rxq = vnet_hw_if_get_rx_queue (vnm, qidx);
+  dpdk_device_t *xd = vec_elt_at_index (dm->devices, rxq->dev_instance);
+
+  u64 b;
+  CLIB_UNUSED (ssize_t size) = read (uf->file_descriptor, &b, sizeof (b));
+  if (rxq->mode != VNET_HW_IF_RX_MODE_POLLING)
+    {
+      vnet_hw_if_rx_queue_set_int_pending (vnm, uf->private_data);
+      rte_eth_dev_rx_intr_enable (xd->port_id, rxq->queue_id);
+    }
+
+  return 0;
+}
+
+static void
+dpdk_setup_interrupts (dpdk_device_t *xd)
+{
+  vnet_main_t *vnm = vnet_get_main ();
+  vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, xd->hw_if_index);
+  if (!hi)
+    return;
+
+  if (!xd->port_conf.intr_conf.rxq)
+    return;
+
+  /* Probe for interrupt support */
+  if (rte_eth_dev_rx_intr_enable (xd->port_id, 0))
+    {
+      dpdk_log_info ("probe for interrupt mode for device %U. Failed.\n",
+                    format_dpdk_device_name, xd->port_id);
+    }
+  else
+    {
+      xd->flags |= DPDK_DEVICE_FLAG_INT_SUPPORTED;
+      rte_eth_dev_rx_intr_disable (xd->port_id, 0);
+      dpdk_log_info ("Probe for interrupt mode for device %U. Success.\n",
+                    format_dpdk_device_name, xd->port_id);
+    }
+
+  if (xd->flags & DPDK_DEVICE_FLAG_INT_SUPPORTED)
+    {
+      hi->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
+      for (int q = 0; q < xd->rx_q_used; q++)
+       {
+         dpdk_rx_queue_t *rxq = vec_elt_at_index (xd->rx_queues, q);
+         clib_file_t f = { 0 };
+         rxq->efd = rte_eth_dev_rx_intr_ctl_q_get_fd (xd->port_id, q);
+         if (rxq->efd < 0)
+           {
+             xd->flags &= ~DPDK_DEVICE_FLAG_INT_SUPPORTED;
+             hi->flags &= ~VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
+             break;
+           }
+         f.read_function = dpdk_rx_read_ready;
+         f.flags = UNIX_FILE_EVENT_EDGE_TRIGGERED;
+         f.file_descriptor = rxq->efd;
+         f.private_data = rxq->queue_index;
+         f.description =
+           format (0, "%U queue %u", format_dpdk_device_name, xd->port_id, q);
+         rxq->clib_file_index = clib_file_add (&file_main, &f);
+         vnet_hw_if_set_rx_queue_file_index (vnm, rxq->queue_index,
+                                             rxq->clib_file_index);
+       }
+    }
+  vnet_hw_if_update_runtime_data (vnm, xd->hw_if_index);
+}
+
 void
 dpdk_device_start (dpdk_device_t * xd)
 {
@@ -175,11 +251,11 @@ dpdk_device_start (dpdk_device_t * xd)
       return;
     }
 
+  dpdk_setup_interrupts (xd);
+
   if (xd->default_mac_address)
-    rv =
-      rte_eth_dev_default_mac_addr_set (xd->port_id,
-                                       (struct ether_addr *)
-                                       xd->default_mac_address);
+    rv = rte_eth_dev_default_mac_addr_set (xd->port_id,
+                                          (void *) xd->default_mac_address);
 
   if (rv)
     dpdk_device_error (xd, "rte_eth_dev_default_mac_addr_set", rv);
@@ -191,17 +267,6 @@ dpdk_device_start (dpdk_device_t * xd)
 
   rte_eth_allmulticast_enable (xd->port_id);
 
-  if (xd->pmd == VNET_DPDK_PMD_BOND)
-    {
-      dpdk_portid_t slink[16];
-      int nlink = rte_eth_bond_slaves_get (xd->port_id, slink, 16);
-      while (nlink >= 1)
-       {
-         dpdk_portid_t dpdk_port = slink[--nlink];
-         rte_eth_allmulticast_enable (dpdk_port);
-       }
-    }
-
   dpdk_log_info ("Interface %U started",
                 format_dpdk_device_name, xd->port_id);
 }
@@ -214,84 +279,19 @@ dpdk_device_stop (dpdk_device_t * xd)
 
   rte_eth_allmulticast_disable (xd->port_id);
   rte_eth_dev_stop (xd->port_id);
-  memset (&xd->link, 0, sizeof (struct rte_eth_link));
+  clib_memset (&xd->link, 0, sizeof (struct rte_eth_link));
 
-  /* For bonded interface, stop slave links */
-  if (xd->pmd == VNET_DPDK_PMD_BOND)
-    {
-      dpdk_portid_t slink[16];
-      int nlink = rte_eth_bond_slaves_get (xd->port_id, slink, 16);
-      while (nlink >= 1)
-       {
-         dpdk_portid_t dpdk_port = slink[--nlink];
-         rte_eth_dev_stop (dpdk_port);
-       }
-    }
   dpdk_log_info ("Interface %U stopped",
                 format_dpdk_device_name, xd->port_id);
 }
 
-/* Even type for send_garp_na_process */
-enum
-{
-  SEND_GARP_NA = 1,
-} dpdk_send_garp_na_process_event_t;
-
-static vlib_node_registration_t send_garp_na_proc_node;
-
-static uword
-send_garp_na_process (vlib_main_t * vm,
-                     vlib_node_runtime_t * rt, vlib_frame_t * f)
-{
-  uword event_type, *event_data = 0;
-
-  while (1)
-    {
-      u32 i;
-      uword dpdk_port;
-      vlib_process_wait_for_event (vm);
-      event_type = vlib_process_get_events (vm, &event_data);
-      ASSERT (event_type == SEND_GARP_NA);
-      for (i = 0; i < vec_len (event_data); i++)
-       {
-         dpdk_port = event_data[i];
-         if (i < 5)            /* wait 0.2 sec for link to settle, max total 1 sec */
-           vlib_process_suspend (vm, 0.2);
-         dpdk_device_t *xd = &dpdk_main.devices[dpdk_port];
-         dpdk_update_link_state (xd, vlib_time_now (vm));
-         send_ip4_garp (vm, xd->sw_if_index);
-         send_ip6_na (vm, xd->sw_if_index);
-       }
-      vec_reset_length (event_data);
-    }
-  return 0;
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (send_garp_na_proc_node, static) = {
-    .function = send_garp_na_process,
-    .type = VLIB_NODE_TYPE_PROCESS,
-    .name = "send-garp-na-process",
-};
-/* *INDENT-ON* */
-
 void vl_api_force_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
 
-static void
-garp_na_proc_callback (uword * dpdk_port)
-{
-  vlib_main_t *vm = vlib_get_main ();
-  ASSERT (vlib_get_thread_index () == 0);
-  vlib_process_signal_event
-    (vm, send_garp_na_proc_node.index, SEND_GARP_NA, *dpdk_port);
-}
-
 always_inline int
 dpdk_port_state_callback_inline (dpdk_portid_t port_id,
                                 enum rte_eth_event_type type, void *param)
 {
   struct rte_eth_link link;
-  dpdk_device_t *xd = &dpdk_main.devices[port_id];
 
   RTE_SET_USED (param);
   if (type != RTE_ETH_EVENT_INTR_LSC)
@@ -302,36 +302,13 @@ dpdk_port_state_callback_inline (dpdk_portid_t port_id,
 
   rte_eth_link_get_nowait (port_id, &link);
   u8 link_up = link.link_status;
-
-  if (xd->flags & DPDK_DEVICE_FLAG_BOND_SLAVE)
-    {
-      uword bd_port = xd->bond_port;
-      int bd_mode = rte_eth_bond_mode_get (bd_port);
-      dpdk_log_info ("Port %d state to %s, "
-                    "slave of port %d BondEthernet%d in mode %d",
-                    port_id, (link_up) ? "UP" : "DOWN",
-                    bd_port, xd->bond_instance_num, bd_mode);
-      if (bd_mode == BONDING_MODE_ACTIVE_BACKUP)
-       {
-         vl_api_force_rpc_call_main_thread
-           (garp_na_proc_callback, (u8 *) & bd_port, sizeof (uword));
-       }
-
-      if (link_up)
-       xd->flags |= DPDK_DEVICE_FLAG_BOND_SLAVE_UP;
-      else
-       xd->flags &= ~DPDK_DEVICE_FLAG_BOND_SLAVE_UP;
-    }
-  else                         /* Should not happen as callback not setup for "normal" links */
-    {
-      if (link_up)
-       dpdk_log_info ("Port %d Link Up - speed %u Mbps - %s",
-                      port_id, (unsigned) link.link_speed,
-                      (link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
-                      "full-duplex" : "half-duplex");
-      else
-       dpdk_log_info ("Port %d Link Down\n\n", port_id);
-    }
+  if (link_up)
+    dpdk_log_info ("Port %d Link Up - speed %u Mbps - %s",
+                  port_id, (unsigned) link.link_speed,
+                  (link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
+                  "full-duplex" : "half-duplex");
+  else
+    dpdk_log_info ("Port %d Link Down\n\n", port_id);
 
   return 0;
 }
@@ -345,6 +322,32 @@ dpdk_port_state_callback (dpdk_portid_t port_id,
   return dpdk_port_state_callback_inline (port_id, type, param);
 }
 
+/* If this device is PCI return pointer to info, otherwise NULL */
+struct rte_pci_device *
+dpdk_get_pci_device (const struct rte_eth_dev_info *info)
+{
+  const struct rte_bus *bus;
+
+  bus = rte_bus_find_by_device (info->device);
+  if (bus && !strcmp (bus->name, "pci"))
+    return RTE_DEV_TO_PCI (info->device);
+  else
+    return NULL;
+}
+
+/* If this device is VMBUS return pointer to info, otherwise NULL */
+struct rte_vmbus_device *
+dpdk_get_vmbus_device (const struct rte_eth_dev_info *info)
+{
+  const struct rte_bus *bus;
+
+  bus = rte_bus_find_by_device (info->device);
+  if (bus && !strcmp (bus->name, "vmbus"))
+    return container_of (info->device, struct rte_vmbus_device, device);
+  else
+    return NULL;
+}
+
 /*
  * fd.io coding-style-patch-verification: ON
  *