virtio: virtio: implement packed queues from virtio 1.1
[vpp.git] / src / vnet / devices / virtio / virtio.c
index d78c911..99f581a 100644 (file)
@@ -21,8 +21,6 @@
 #include <net/if.h>
 #include <linux/if_tun.h>
 #include <sys/ioctl.h>
-#include <linux/virtio_net.h>
-#include <linux/vhost.h>
 #include <sys/eventfd.h>
 
 #include <vlib/vlib.h>
@@ -55,7 +53,8 @@ call_read_ready (clib_file_t * uf)
 
   CLIB_UNUSED (ssize_t size) = read (uf->file_descriptor, &b, sizeof (b));
   if ((qid & 1) == 0)
-    vnet_device_input_set_interrupt_pending (vnm, vif->hw_if_index, qid);
+    vnet_device_input_set_interrupt_pending (vnm, vif->hw_if_index,
+                                            RX_QUEUE_ACCESS (qid));
 
   return 0;
 }
@@ -92,19 +91,19 @@ virtio_vring_init (vlib_main_t * vm, virtio_if_t * vif, u16 idx, u16 sz)
                            CLIB_CACHE_LINE_BYTES);
       vring = vec_elt_at_index (vif->rxq_vrings, RX_QUEUE_ACCESS (idx));
     }
-  i = sizeof (struct vring_desc) * sz;
+  i = sizeof (vring_desc_t) * sz;
   i = round_pow2 (i, CLIB_CACHE_LINE_BYTES);
   vring->desc = clib_mem_alloc_aligned (i, CLIB_CACHE_LINE_BYTES);
   clib_memset (vring->desc, 0, i);
 
-  i = sizeof (struct vring_avail) + sz * sizeof (vring->avail->ring[0]);
+  i = sizeof (vring_avail_t) + sz * sizeof (vring->avail->ring[0]);
   i = round_pow2 (i, CLIB_CACHE_LINE_BYTES);
   vring->avail = clib_mem_alloc_aligned (i, CLIB_CACHE_LINE_BYTES);
   clib_memset (vring->avail, 0, i);
   // tell kernel that we don't need interrupt
-  vring->avail->flags = VIRTIO_RING_FLAG_MASK_INT;
+  vring->avail->flags = VRING_AVAIL_F_NO_INTERRUPT;
 
-  i = sizeof (struct vring_used) + sz * sizeof (struct vring_used_elem);
+  i = sizeof (vring_used_t) + sz * sizeof (vring_used_elem_t);
   i = round_pow2 (i, CLIB_CACHE_LINE_BYTES);
   vring->used = clib_mem_alloc_aligned (i, CLIB_CACHE_LINE_BYTES);
   clib_memset (vring->used, 0, i);
@@ -135,7 +134,7 @@ virtio_vring_init (vlib_main_t * vm, virtio_if_t * vif, u16 idx, u16 sz)
 }
 
 inline void
-virtio_free_rx_buffers (vlib_main_t * vm, virtio_vring_t * vring)
+virtio_free_buffers (vlib_main_t * vm, virtio_vring_t * vring)
 {
   u16 used = vring->desc_in_use;
   u16 last = vring->last_used_idx;
@@ -160,7 +159,7 @@ virtio_vring_free_rx (vlib_main_t * vm, virtio_if_t * vif, u32 idx)
   close (vring->call_fd);
   if (vring->used)
     {
-      virtio_free_rx_buffers (vm, vring);
+      virtio_free_buffers (vm, vring);
       clib_mem_free (vring->used);
     }
   if (vring->desc)
@@ -171,32 +170,6 @@ virtio_vring_free_rx (vlib_main_t * vm, virtio_if_t * vif, u32 idx)
   return 0;
 }
 
-inline void
-virtio_free_used_desc (vlib_main_t * vm, virtio_vring_t * vring)
-{
-  u16 used = vring->desc_in_use;
-  u16 sz = vring->size;
-  u16 mask = sz - 1;
-  u16 last = vring->last_used_idx;
-  u16 n_left = vring->used->idx - last;
-
-  if (n_left == 0)
-    return;
-
-  while (n_left)
-    {
-      struct vring_used_elem *e = &vring->used->ring[last & mask];
-      u16 slot = e->id;
-
-      vlib_buffer_free (vm, &vring->buffers[slot], 1);
-      used--;
-      last++;
-      n_left--;
-    }
-  vring->desc_in_use = used;
-  vring->last_used_idx = last;
-}
-
 clib_error_t *
 virtio_vring_free_tx (vlib_main_t * vm, virtio_if_t * vif, u32 idx)
 {
@@ -208,7 +181,7 @@ virtio_vring_free_tx (vlib_main_t * vm, virtio_if_t * vif, u32 idx)
   close (vring->call_fd);
   if (vring->used)
     {
-      virtio_free_used_desc (vm, vring);
+      virtio_free_buffers (vm, vring);
       clib_mem_free (vring->used);
     }
   if (vring->desc)
@@ -216,10 +189,49 @@ virtio_vring_free_tx (vlib_main_t * vm, virtio_if_t * vif, u32 idx)
   if (vring->avail)
     clib_mem_free (vring->avail);
   vec_free (vring->buffers);
+  gro_flow_table_free (vring->flow_table);
+  virtio_vring_buffering_free (vm, vring->buffering);
   clib_spinlock_free (&vring->lockp);
   return 0;
 }
 
+void
+virtio_set_packet_coalesce (virtio_if_t * vif)
+{
+  vnet_main_t *vnm = vnet_get_main ();
+  vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, vif->hw_if_index);
+  virtio_vring_t *vring;
+  vif->packet_coalesce = 1;
+  vec_foreach (vring, vif->txq_vrings)
+  {
+    gro_flow_table_init (&vring->flow_table,
+                        vif->type & (VIRTIO_IF_TYPE_TAP |
+                                     VIRTIO_IF_TYPE_PCI), hw->tx_node_index);
+  }
+}
+
+clib_error_t *
+virtio_set_packet_buffering (virtio_if_t * vif, u16 buffering_size)
+{
+  vnet_main_t *vnm = vnet_get_main ();
+  vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, vif->hw_if_index);
+  virtio_vring_t *vring;
+  clib_error_t *error = 0;
+  vif->packet_buffering = 1;
+
+  vec_foreach (vring, vif->txq_vrings)
+  {
+    if ((error =
+        virtio_vring_buffering_init (&vring->buffering, hw->tx_node_index,
+                                     buffering_size)))
+      {
+       break;
+      }
+  }
+
+  return error;
+}
+
 void
 virtio_vring_set_numa_node (vlib_main_t * vm, virtio_if_t * vif, u32 idx)
 {
@@ -241,9 +253,9 @@ virtio_set_net_hdr_size (virtio_if_t * vif)
 {
   if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF) ||
       vif->features & VIRTIO_FEATURE (VIRTIO_F_VERSION_1))
-    vif->virtio_net_hdr_sz = sizeof (struct virtio_net_hdr_v1);
+    vif->virtio_net_hdr_sz = sizeof (virtio_net_hdr_v1_t);
   else
-    vif->virtio_net_hdr_sz = sizeof (struct virtio_net_hdr);
+    vif->virtio_net_hdr_sz = sizeof (virtio_net_hdr_t);
 }
 
 inline void
@@ -294,7 +306,7 @@ virtio_show (vlib_main_t * vm, u32 * hw_if_indices, u8 show_descr, u32 type)
          vlib_cli_output (vm, "  PCI Address: %U", format_vlib_pci_addr,
                           &vif->pci_addr);
        }
-      if (type == VIRTIO_IF_TYPE_TAP)
+      if (type & (VIRTIO_IF_TYPE_TAP | VIRTIO_IF_TYPE_TUN))
        {
          u8 *str = 0;
          if (vif->host_if_name)
@@ -304,19 +316,27 @@ virtio_show (vlib_main_t * vm, u32 * hw_if_indices, u8 show_descr, u32 type)
          if (vif->host_mtu_size)
            vlib_cli_output (vm, "  host-mtu-size \"%d\"",
                             vif->host_mtu_size);
-         vlib_cli_output (vm, "  host-mac-addr: %U",
-                          format_ethernet_address, vif->host_mac_addr);
+         if (type == VIRTIO_IF_TYPE_TAP)
+           vlib_cli_output (vm, "  host-mac-addr: %U",
+                            format_ethernet_address, vif->host_mac_addr);
+         vlib_cli_output (vm, "  host-carrier-up: %u", vif->host_carrier_up);
 
          vec_foreach_index (i, vif->vhost_fds)
            str = format (str, " %d", vif->vhost_fds[i]);
          vlib_cli_output (vm, "  vhost-fds%v", str);
          vec_free (str);
-         vlib_cli_output (vm, "  tap-fd %d", vif->tap_fd);
+         vec_foreach_index (i, vif->tap_fds)
+           str = format (str, " %d", vif->tap_fds[i]);
+         vlib_cli_output (vm, "  tap-fds%v", str);
+         vec_free (str);
        }
       vlib_cli_output (vm, "  gso-enabled %d", vif->gso_enabled);
       vlib_cli_output (vm, "  csum-enabled %d", vif->csum_offload_enabled);
-      vlib_cli_output (vm, "  Mac Address: %U", format_ethernet_address,
-                      vif->mac_addr);
+      vlib_cli_output (vm, "  packet-coalesce %d", vif->packet_coalesce);
+      vlib_cli_output (vm, "  packet-buffering %d", vif->packet_buffering);
+      if (type & (VIRTIO_IF_TYPE_TAP | VIRTIO_IF_TYPE_PCI))
+       vlib_cli_output (vm, "  Mac Address: %U", format_ethernet_address,
+                        vif->mac_addr);
       vlib_cli_output (vm, "  Device instance: %u", vif->dev_instance);
       vlib_cli_output (vm, "  flags 0x%x", vif->flags);
       flag_entry = (struct feat_struct *) &flags_array;
@@ -362,11 +382,25 @@ virtio_show (vlib_main_t * vm, u32 * hw_if_indices, u8 show_descr, u32 type)
                         "    qsz %d, last_used_idx %d, desc_next %d, desc_in_use %d",
                         vring->size, vring->last_used_idx, vring->desc_next,
                         vring->desc_in_use);
-       vlib_cli_output (vm,
-                        "    avail.flags 0x%x avail.idx %d used.flags 0x%x used.idx %d",
-                        vring->avail->flags, vring->avail->idx,
-                        vring->used->flags, vring->used->idx);
-       if (type == VIRTIO_IF_TYPE_TAP)
+       if (vif->is_packed)
+         {
+           vlib_cli_output (vm,
+                            "    driver_event.flags 0x%x driver_event.off_wrap %d device_event.flags 0x%x device_event.off_wrap %d",
+                            vring->driver_event->flags,
+                            vring->driver_event->off_wrap,
+                            vring->device_event->flags,
+                            vring->device_event->off_wrap);
+           vlib_cli_output (vm,
+                            "    avail wrap counter %d, used wrap counter %d",
+                            vring->avail_wrap_counter,
+                            vring->used_wrap_counter);
+         }
+       else
+         vlib_cli_output (vm,
+                          "    avail.flags 0x%x avail.idx %d used.flags 0x%x used.idx %d",
+                          vring->avail->flags, vring->avail->idx,
+                          vring->used->flags, vring->used->idx);
+       if (type & (VIRTIO_IF_TYPE_TAP | VIRTIO_IF_TYPE_TUN))
          {
            vlib_cli_output (vm, "    kickfd %d, callfd %d", vring->kick_fd,
                             vring->call_fd);
@@ -375,17 +409,29 @@ virtio_show (vlib_main_t * vm, u32 * hw_if_indices, u8 show_descr, u32 type)
          {
            vlib_cli_output (vm, "\n  descriptor table:\n");
            vlib_cli_output (vm,
-                            "   id          addr         len  flags  next      user_addr\n");
+                            "   id          addr         len  flags  next/id      user_addr\n");
            vlib_cli_output (vm,
-                            "  ===== ================== ===== ====== ===== ==================\n");
+                            "  ===== ================== ===== ====== ======= ==================\n");
            for (j = 0; j < vring->size; j++)
              {
-               struct vring_desc *desc = &vring->desc[j];
-               vlib_cli_output (vm,
-                                "  %-5d 0x%016lx %-5d 0x%04x %-5d 0x%016lx\n",
-                                j, desc->addr,
-                                desc->len,
-                                desc->flags, desc->next, desc->addr);
+               if (vif->is_packed)
+                 {
+                   vring_packed_desc_t *desc = &vring->packed_desc[j];
+                   vlib_cli_output (vm,
+                                    "  %-5d 0x%016lx %-5d 0x%04x %-8d 0x%016lx\n",
+                                    j, desc->addr,
+                                    desc->len,
+                                    desc->flags, desc->id, desc->addr);
+                 }
+               else
+                 {
+                   vring_desc_t *desc = &vring->desc[j];
+                   vlib_cli_output (vm,
+                                    "  %-5d 0x%016lx %-5d 0x%04x %-8d 0x%016lx\n",
+                                    j, desc->addr,
+                                    desc->len,
+                                    desc->flags, desc->next, desc->addr);
+                 }
              }
          }
       }
@@ -397,30 +443,66 @@ virtio_show (vlib_main_t * vm, u32 * hw_if_indices, u8 show_descr, u32 type)
                         "    qsz %d, last_used_idx %d, desc_next %d, desc_in_use %d",
                         vring->size, vring->last_used_idx, vring->desc_next,
                         vring->desc_in_use);
-       vlib_cli_output (vm,
-                        "    avail.flags 0x%x avail.idx %d used.flags 0x%x used.idx %d",
-                        vring->avail->flags, vring->avail->idx,
-                        vring->used->flags, vring->used->idx);
-       if (type == VIRTIO_IF_TYPE_TAP)
+       if (vif->is_packed)
+         {
+           vlib_cli_output (vm,
+                            "    driver_event.flags 0x%x driver_event.off_wrap %d device_event.flags 0x%x device_event.off_wrap %d",
+                            vring->driver_event->flags,
+                            vring->driver_event->off_wrap,
+                            vring->device_event->flags,
+                            vring->device_event->off_wrap);
+           vlib_cli_output (vm,
+                            "    avail wrap counter %d, used wrap counter %d",
+                            vring->avail_wrap_counter,
+                            vring->used_wrap_counter);
+         }
+       else
+         vlib_cli_output (vm,
+                          "    avail.flags 0x%x avail.idx %d used.flags 0x%x used.idx %d",
+                          vring->avail->flags, vring->avail->idx,
+                          vring->used->flags, vring->used->idx);
+       if (type & (VIRTIO_IF_TYPE_TAP | VIRTIO_IF_TYPE_TUN))
          {
            vlib_cli_output (vm, "    kickfd %d, callfd %d", vring->kick_fd,
                             vring->call_fd);
          }
+       if (vring->flow_table)
+         {
+           vlib_cli_output (vm, "    %U", gro_flow_table_format,
+                            vring->flow_table);
+         }
+       if (vif->packet_buffering)
+         {
+           vlib_cli_output (vm, "    %U", virtio_vring_buffering_format,
+                            vring->buffering);
+         }
        if (show_descr)
          {
            vlib_cli_output (vm, "\n  descriptor table:\n");
            vlib_cli_output (vm,
-                            "   id          addr         len  flags  next      user_addr\n");
+                            "   id          addr         len  flags  next/id      user_addr\n");
            vlib_cli_output (vm,
-                            "  ===== ================== ===== ====== ===== ==================\n");
+                            "  ===== ================== ===== ====== ======== ==================\n");
            for (j = 0; j < vring->size; j++)
              {
-               struct vring_desc *desc = &vring->desc[j];
-               vlib_cli_output (vm,
-                                "  %-5d 0x%016lx %-5d 0x%04x %-5d 0x%016lx\n",
-                                j, desc->addr,
-                                desc->len,
-                                desc->flags, desc->next, desc->addr);
+               if (vif->is_packed)
+                 {
+                   vring_packed_desc_t *desc = &vring->packed_desc[j];
+                   vlib_cli_output (vm,
+                                    "  %-5d 0x%016lx %-5d 0x%04x %-8d 0x%016lx\n",
+                                    j, desc->addr,
+                                    desc->len,
+                                    desc->flags, desc->id, desc->addr);
+                 }
+               else
+                 {
+                   vring_desc_t *desc = &vring->desc[j];
+                   vlib_cli_output (vm,
+                                    "  %-5d 0x%016lx %-5d 0x%04x %-8d 0x%016lx\n",
+                                    j, desc->addr,
+                                    desc->len,
+                                    desc->flags, desc->next, desc->addr);
+                 }
              }
          }
       }
@@ -433,11 +515,27 @@ virtio_show (vlib_main_t * vm, u32 * hw_if_indices, u8 show_descr, u32 type)
                           "    qsz %d, last_used_idx %d, desc_next %d, desc_in_use %d",
                           vring->size, vring->last_used_idx,
                           vring->desc_next, vring->desc_in_use);
-         vlib_cli_output (vm,
-                          "    avail.flags 0x%x avail.idx %d used.flags 0x%x used.idx %d",
-                          vring->avail->flags, vring->avail->idx,
-                          vring->used->flags, vring->used->idx);
-         if (type == VIRTIO_IF_TYPE_TAP)
+         if (vif->is_packed)
+           {
+             vlib_cli_output (vm,
+                              "    driver_event.flags 0x%x driver_event.off_wrap %d device_event.flags 0x%x device_event.off_wrap %d",
+                              vring->driver_event->flags,
+                              vring->driver_event->off_wrap,
+                              vring->device_event->flags,
+                              vring->device_event->off_wrap);
+             vlib_cli_output (vm,
+                              "    avail wrap counter %d, used wrap counter %d",
+                              vring->avail_wrap_counter,
+                              vring->used_wrap_counter);
+           }
+         else
+           {
+             vlib_cli_output (vm,
+                              "    avail.flags 0x%x avail.idx %d used.flags 0x%x used.idx %d",
+                              vring->avail->flags, vring->avail->idx,
+                              vring->used->flags, vring->used->idx);
+           }
+         if (type & (VIRTIO_IF_TYPE_TAP | VIRTIO_IF_TYPE_TUN))
            {
              vlib_cli_output (vm, "    kickfd %d, callfd %d", vring->kick_fd,
                               vring->call_fd);
@@ -446,17 +544,29 @@ virtio_show (vlib_main_t * vm, u32 * hw_if_indices, u8 show_descr, u32 type)
            {
              vlib_cli_output (vm, "\n  descriptor table:\n");
              vlib_cli_output (vm,
-                              "   id          addr         len  flags  next      user_addr\n");
+                              "   id          addr         len  flags  next/id      user_addr\n");
              vlib_cli_output (vm,
-                              "  ===== ================== ===== ====== ===== ==================\n");
+                              "  ===== ================== ===== ====== ======== ==================\n");
              for (j = 0; j < vring->size; j++)
                {
-                 struct vring_desc *desc = &vring->desc[j];
-                 vlib_cli_output (vm,
-                                  "  %-5d 0x%016lx %-5d 0x%04x %-5d 0x%016lx\n",
-                                  j, desc->addr,
-                                  desc->len,
-                                  desc->flags, desc->next, desc->addr);
+                 if (vif->is_packed)
+                   {
+                     vring_packed_desc_t *desc = &vring->packed_desc[j];
+                     vlib_cli_output (vm,
+                                      "  %-5d 0x%016lx %-5d 0x%04x %-8d 0x%016lx\n",
+                                      j, desc->addr,
+                                      desc->len,
+                                      desc->flags, desc->id, desc->addr);
+                   }
+                 else
+                   {
+                     vring_desc_t *desc = &vring->desc[j];
+                     vlib_cli_output (vm,
+                                      "  %-5d 0x%016lx %-5d 0x%04x %-8d 0x%016lx\n",
+                                      j, desc->addr,
+                                      desc->len,
+                                      desc->flags, desc->next, desc->addr);
+                   }
                }
            }
        }