Intel Adaptive Virtual Function native device driver plugin

Change-Id: If168a9c54baaa516ecbe78de2141f11c17aa2f53
Signed-off-by: Damjan Marion <damarion@cisco.com>

1 files changed, 1243 insertions, 0 deletions

diff --git a/src/plugins/avf/device.c b/src/plugins/avf/device.c
new file mode 100644
index 00000000000..4a0fed19d44
--- /dev/null
+++ b/src/plugins/avf/device.c
@@ -0,0 +1,1243 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2018 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 <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vlib/pci/pci.h>
+#include <vnet/ethernet/ethernet.h>
+
+#include <avf/avf.h>
+
+#define AVF_MBOX_LEN 64
+#define AVF_MBOX_BUF_SZ 512
+#define AVF_RXQ_SZ 512
+#define AVF_TXQ_SZ 512
+#define AVF_ITR_INT 8160
+
+#define PCI_VENDOR_ID_INTEL			0x8086
+#define PCI_DEVICE_ID_INTEL_AVF			0x1889
+#define PCI_DEVICE_ID_INTEL_X710_VF		0x154c
+#define PCI_DEVICE_ID_INTEL_X722_VF		0x37cd
+
+avf_main_t avf_main;
+
+static pci_device_id_t avf_pci_device_ids[] = {
+  {.vendor_id = PCI_VENDOR_ID_INTEL,.device_id = PCI_DEVICE_ID_INTEL_AVF},
+  {.vendor_id = PCI_VENDOR_ID_INTEL,.device_id = PCI_DEVICE_ID_INTEL_X710_VF},
+  {0},
+};
+
+//#define avf_log_debug(fmt, ...) fformat(stderr, "%s: " fmt "\n", __func__, __VA_ARGS__)
+#define avf_log_debug(fmt, ...)
+
+static inline void
+avf_irq_0_disable (avf_device_t * ad)
+{
+  u32 dyn_ctl0 = 0, icr0_ena = 0;
+
+  dyn_ctl0 |= (3 << 3);		/* 11b = No ITR update */
+
+  avf_reg_write (ad, AVFINT_ICR0_ENA1, icr0_ena);
+  avf_reg_write (ad, AVFINT_DYN_CTL0, dyn_ctl0);
+  avf_reg_flush (ad);
+}
+
+static inline void
+avf_irq_0_enable (avf_device_t * ad)
+{
+  u32 dyn_ctl0 = 0, icr0_ena = 0;
+
+  icr0_ena |= (1 << 30);	/* [30] Admin Queue Enable */
+
+  dyn_ctl0 |= (1 << 0);		/* [0] Interrupt Enable */
+  dyn_ctl0 |= (1 << 1);		/* [1] Clear PBA */
+  //dyn_ctl0 |= (3 << 3);               /* [4:3] ITR Index, 11b = No ITR update */
+  dyn_ctl0 |= ((AVF_ITR_INT / 2) << 5);	/* [16:5] ITR Interval in 2us steps */
+
+  avf_irq_0_disable (ad);
+  avf_reg_write (ad, AVFINT_ICR0_ENA1, icr0_ena);
+  avf_reg_write (ad, AVFINT_DYN_CTL0, dyn_ctl0);
+  avf_reg_flush (ad);
+}
+
+static inline void
+avf_irq_n_disable (avf_device_t * ad, u8 line)
+{
+  u32 dyn_ctln = 0;
+
+  avf_reg_write (ad, AVFINT_DYN_CTLN (line), dyn_ctln);
+  avf_reg_flush (ad);
+}
+
+static inline void
+avf_irq_n_enable (avf_device_t * ad, u8 line)
+{
+  u32 dyn_ctln = 0;
+
+  dyn_ctln |= (1 << 0);		/* [0] Interrupt Enable */
+  dyn_ctln |= (1 << 1);		/* [1] Clear PBA */
+  dyn_ctln |= ((AVF_ITR_INT / 2) << 5);	/* [16:5] ITR Interval in 2us steps */
+
+  avf_irq_n_disable (ad, line);
+  avf_reg_write (ad, AVFINT_DYN_CTLN (line), dyn_ctln);
+  avf_reg_flush (ad);
+}
+
+
+clib_error_t *
+avf_aq_desc_enq (vlib_main_t * vm, avf_device_t * ad, avf_aq_desc_t * dt,
+		 void *data, int len)
+{
+  clib_error_t *err = 0;
+  avf_aq_desc_t *d, dc;
+  int n_retry = 5;
+
+  d = &ad->atq[ad->atq_next_slot];
+  clib_memcpy (d, dt, sizeof (avf_aq_desc_t));
+  d->flags |= AVF_AQ_F_RD | AVF_AQ_F_SI;
+  if (len)
+    d->datalen = len;
+  if (len)
+    {
+      u64 pa;
+      pa = ad->atq_bufs_pa + ad->atq_next_slot * AVF_MBOX_BUF_SZ;
+      d->addr_hi = (u32) (pa >> 32);
+      d->addr_lo = (u32) pa;
+      clib_memcpy (ad->atq_bufs + ad->atq_next_slot * AVF_MBOX_BUF_SZ, data,
+		   len);
+      d->flags |= AVF_AQ_F_BUF;
+    }
+
+  if (ad->flags & AVF_DEVICE_F_ELOG)
+    clib_memcpy (&dc, d, sizeof (avf_aq_desc_t));
+
+  CLIB_MEMORY_BARRIER ();
+  avf_log_debug ("%U", format_hexdump, data, len);
+  ad->atq_next_slot = (ad->atq_next_slot + 1) % AVF_MBOX_LEN;
+  avf_reg_write (ad, AVF_ATQT, ad->atq_next_slot);
+  avf_reg_flush (ad);
+
+retry:
+  vlib_process_suspend (vm, 10e-6);
+
+  if (((d->flags & AVF_AQ_F_DD) == 0) || ((d->flags & AVF_AQ_F_CMP) == 0))
+    {
+      if (--n_retry == 0)
+	{
+	  err = clib_error_return (0, "adminq enqueue timeout [opcode 0x%x]",
+				   d->opcode);
+	  goto done;
+	}
+      goto retry;
+    }
+
+  clib_memcpy (dt, d, sizeof (avf_aq_desc_t));
+  if (d->flags & AVF_AQ_F_ERR)
+    return clib_error_return (0, "adminq enqueue error [opcode 0x%x, retval "
+			      "%d]", d->opcode, d->retval);
+
+done:
+  if (ad->flags & AVF_DEVICE_F_ELOG)
+    {
+      /* *INDENT-OFF* */
+      ELOG_TYPE_DECLARE (el) =
+	{
+	  .format = "avf[%d] aq enq: s_flags 0x%x r_flags 0x%x opcode 0x%x "
+	    "datalen %d retval %d",
+	  .format_args = "i4i2i2i2i2i2",
+	};
+      struct
+	{
+	  u32 dev_instance;
+	  u16 s_flags;
+	  u16 r_flags;
+	  u16 opcode;
+	  u16 datalen;
+	  u16 retval;
+	} *ed;
+      ed = ELOG_DATA (&vm->elog_main, el);
+      ed->dev_instance = ad->dev_instance;
+      ed->s_flags = dc.flags;
+      ed->r_flags = d->flags;
+      ed->opcode = dc.opcode;
+      ed->datalen = dc.datalen;
+      ed->retval = d->retval;
+      /* *INDENT-ON* */
+    }
+
+  return err;
+}
+
+clib_error_t *
+avf_cmd_rx_ctl_reg_write (vlib_main_t * vm, avf_device_t * ad, u32 reg,
+			  u32 val)
+{
+  clib_error_t *err;
+  avf_aq_desc_t d = {.opcode = 0x207,.param1 = reg,.param3 = val };
+  err = avf_aq_desc_enq (vm, ad, &d, 0, 0);
+
+  if (ad->flags & AVF_DEVICE_F_ELOG)
+    {
+      /* *INDENT-OFF* */
+      ELOG_TYPE_DECLARE (el) =
+	{
+	  .format = "avf[%d] rx ctl reg write: reg 0x%x val 0x%x ",
+	  .format_args = "i4i4i4",
+	};
+      struct
+	{
+	  u32 dev_instance;
+	  u32 reg;
+	  u32 val;
+	} *ed;
+      ed = ELOG_DATA (&vm->elog_main, el);
+      ed->dev_instance = ad->dev_instance;
+      ed->reg = reg;
+      ed->val = val;
+      /* *INDENT-ON* */
+    }
+  return err;
+}
+
+clib_error_t *
+avf_rxq_init (vlib_main_t * vm, avf_device_t * ad, u16 qid)
+{
+  avf_main_t *am = &avf_main;
+  avf_rxq_t *rxq;
+  clib_error_t *error = 0;
+  u32 n_alloc, i;
+
+  vec_validate_aligned (ad->rxqs, qid, CLIB_CACHE_LINE_BYTES);
+  rxq = vec_elt_at_index (ad->rxqs, qid);
+  rxq->size = AVF_RXQ_SZ;
+  rxq->next = 0;
+  rxq->descs = vlib_physmem_alloc_aligned (vm, am->physmem_region, &error,
+					   rxq->size * sizeof (avf_rx_desc_t),
+					   2 * CLIB_CACHE_LINE_BYTES);
+  memset (rxq->descs, 0, rxq->size * sizeof (avf_rx_desc_t));
+  vec_validate_aligned (rxq->bufs, rxq->size, CLIB_CACHE_LINE_BYTES);
+  rxq->qrx_tail = ad->bar0 + AVF_QRX_TAIL (qid);
+
+  n_alloc = vlib_buffer_alloc (vm, rxq->bufs, rxq->size - 8);
+
+  if (n_alloc == 0)
+    return clib_error_return (0, "buffer allocation error");
+
+  rxq->n_bufs = n_alloc;
+  avf_rx_desc_t *d = rxq->descs;
+  for (i = 0; i < n_alloc; i++)
+    {
+      if (ad->flags & AVF_DEVICE_F_IOVA)
+	{
+	  vlib_buffer_t *b = vlib_get_buffer (vm, rxq->bufs[i]);
+	  d->qword[0] = pointer_to_uword (b->data);
+	}
+      else
+	d->qword[0] =
+	  vlib_get_buffer_data_physical_address (vm, rxq->bufs[i]);
+      d++;
+    }
+  return 0;
+}
+
+clib_error_t *
+avf_txq_init (vlib_main_t * vm, avf_device_t * ad, u16 qid)
+{
+  avf_main_t *am = &avf_main;
+  avf_txq_t *txq;
+  clib_error_t *error = 0;
+
+  if (qid >= ad->num_queue_pairs)
+    {
+      qid = qid % ad->num_queue_pairs;
+      txq = vec_elt_at_index (ad->txqs, qid);
+      if (txq->lock == 0)
+	clib_spinlock_init (&txq->lock);
+      ad->flags |= AVF_DEVICE_F_SHARED_TXQ_LOCK;
+      return 0;
+    }
+
+  vec_validate_aligned (ad->txqs, qid, CLIB_CACHE_LINE_BYTES);
+  txq = vec_elt_at_index (ad->txqs, qid);
+  txq->size = AVF_TXQ_SZ;
+  txq->next = 0;
+  txq->descs = vlib_physmem_alloc_aligned (vm, am->physmem_region, &error,
+					   txq->size * sizeof (avf_tx_desc_t),
+					   2 * CLIB_CACHE_LINE_BYTES);
+  vec_validate_aligned (txq->bufs, txq->size, CLIB_CACHE_LINE_BYTES);
+  txq->qtx_tail = ad->bar0 + AVF_QTX_TAIL (qid);
+  return 0;
+}
+
+typedef struct
+{
+  u16 vsi_id;
+  u16 flags;
+} virtchnl_promisc_info_t;
+
+void
+avf_arq_slot_init (avf_device_t * ad, u16 slot)
+{
+  avf_aq_desc_t *d;
+  u64 pa = ad->arq_bufs_pa + slot * AVF_MBOX_BUF_SZ;
+  d = &ad->arq[slot];
+  memset (d, 0, sizeof (avf_aq_desc_t));
+  d->flags = AVF_AQ_F_BUF;
+  d->datalen = AVF_MBOX_BUF_SZ;
+  d->addr_hi = (u32) (pa >> 32);
+  d->addr_lo = (u32) pa;
+}
+
+static inline uword
+avf_dma_addr (vlib_main_t * vm, avf_device_t * ad, void *p)
+{
+  avf_main_t *am = &avf_main;
+  return (ad->flags & AVF_DEVICE_F_IOVA) ?
+    pointer_to_uword (p) :
+    vlib_physmem_virtual_to_physical (vm, am->physmem_region, p);
+}
+
+static void
+avf_adminq_init (vlib_main_t * vm, avf_device_t * ad)
+{
+  u64 pa;
+  int i;
+
+  /* VF MailBox Transmit */
+  memset (ad->atq, 0, sizeof (avf_aq_desc_t) * AVF_MBOX_LEN);
+  ad->atq_bufs_pa = avf_dma_addr (vm, ad, ad->atq_bufs);
+
+  pa = avf_dma_addr (vm, ad, ad->atq);
+  avf_reg_write (ad, AVF_ATQT, 0);	/* Tail */
+  avf_reg_write (ad, AVF_ATQH, 0);	/* Head */
+  avf_reg_write (ad, AVF_ATQLEN, AVF_MBOX_LEN | (1 << 31));	/* len & ena */
+  avf_reg_write (ad, AVF_ATQBAL, (u32) pa);	/* Base Address Low */
+  avf_reg_write (ad, AVF_ATQBAH, (u32) (pa >> 32));	/* Base Address High */
+
+  /* VF MailBox Receive */
+  memset (ad->arq, 0, sizeof (avf_aq_desc_t) * AVF_MBOX_LEN);
+  ad->arq_bufs_pa = avf_dma_addr (vm, ad, ad->arq_bufs);
+
+  for (i = 0; i < AVF_MBOX_LEN; i++)
+    avf_arq_slot_init (ad, i);
+
+  pa = avf_dma_addr (vm, ad, ad->arq);
+
+  avf_reg_write (ad, AVF_ARQH, 0);	/* Head */
+  avf_reg_write (ad, AVF_ARQT, 0);	/* Head */
+  avf_reg_write (ad, AVF_ARQLEN, AVF_MBOX_LEN | (1 << 31));	/* len & ena */
+  avf_reg_write (ad, AVF_ARQBAL, (u32) pa);	/* Base Address Low */
+  avf_reg_write (ad, AVF_ARQBAH, (u32) (pa >> 32));	/* Base Address High */
+  avf_reg_write (ad, AVF_ARQT, AVF_MBOX_LEN - 1);	/* Tail */
+
+  ad->atq_next_slot = 0;
+  ad->arq_next_slot = 0;
+}
+
+clib_error_t *
+avf_send_to_pf (vlib_main_t * vm, avf_device_t * ad, virtchnl_ops_t op,
+		void *in, int in_len, void *out, int out_len)
+{
+  clib_error_t *err;
+  avf_aq_desc_t *d, dt = {.opcode = 0x801,.v_opcode = op };
+  u32 head;
+  int n_retry = 5;
+
+
+  /* supppres interrupt in the next adminq receive slot
+     as we are going to wait for response
+     we only need interrupts when event is received */
+  d = &ad->arq[ad->arq_next_slot];
+  d->flags |= AVF_AQ_F_SI;
+
+  if ((err = avf_aq_desc_enq (vm, ad, &dt, in, in_len)))
+    return err;
+
+retry:
+  head = avf_get_u32 (ad->bar0, AVF_ARQH);
+
+  if (ad->arq_next_slot == head)
+    {
+      if (--n_retry == 0)
+	return clib_error_return (0, "timeout");
+      vlib_process_suspend (vm, 10e-3);
+      goto retry;
+    }
+
+  d = &ad->arq[ad->arq_next_slot];
+
+  if (d->v_opcode == VIRTCHNL_OP_EVENT)
+    {
+      void *buf = ad->arq_bufs + ad->arq_next_slot * AVF_MBOX_BUF_SZ;
+      virtchnl_pf_event_t *e;
+
+      if ((d->datalen != sizeof (virtchnl_pf_event_t)) ||
+	  ((d->flags & AVF_AQ_F_BUF) == 0))
+	return clib_error_return (0, "event message error");
+
+      vec_add2 (ad->events, e, 1);
+      clib_memcpy (e, buf, sizeof (virtchnl_pf_event_t));
+      avf_arq_slot_init (ad, ad->arq_next_slot);
+      ad->arq_next_slot++;
+      n_retry = 5;
+      goto retry;
+    }
+
+  if (d->v_opcode != op)
+    {
+      err = clib_error_return (0, "unexpected message receiver [v_opcode = %u"
+			       "expected %u]", d->v_opcode, op);
+      goto done;
+    }
+
+  if (d->v_retval)
+    {
+      err = clib_error_return (0, "error [v_opcode = %u, v_retval %d]",
+			       d->v_opcode, d->v_retval);
+      goto done;
+    }
+
+  if (d->flags & AVF_AQ_F_BUF)
+    {
+      void *buf = ad->arq_bufs + ad->arq_next_slot * AVF_MBOX_BUF_SZ;
+      clib_memcpy (out, buf, out_len);
+    }
+
+  avf_arq_slot_init (ad, ad->arq_next_slot);
+  avf_reg_write (ad, AVF_ARQT, ad->arq_next_slot);
+  avf_reg_flush (ad);
+  ad->arq_next_slot = (ad->arq_next_slot + 1) % AVF_MBOX_LEN;
+
+done:
+
+  if (ad->flags & AVF_DEVICE_F_ELOG)
+    {
+      /* *INDENT-OFF* */
+      ELOG_TYPE_DECLARE (el) =
+	{
+	  .format = "avf[%d] send to pf: v_opcode %s (%d) v_retval 0x%x",
+	  .format_args = "i4t4i4i4",
+	  .n_enum_strings = VIRTCHNL_N_OPS,
+	  .enum_strings = {
+#define _(v, n) [v] = #n,
+	      foreach_virtchnl_op
+#undef _
+	  },
+	};
+      struct
+	{
+	  u32 dev_instance;
+	  u32 v_opcode;
+	  u32 v_opcode_val;
+	  u32 v_retval;
+	} *ed;
+      ed = ELOG_DATA (&vm->elog_main, el);
+      ed->dev_instance = ad->dev_instance;
+      ed->v_opcode = op;
+      ed->v_opcode_val = op;
+      ed->v_retval = d->v_retval;
+      /* *INDENT-ON* */
+    }
+  return err;
+}
+
+clib_error_t *
+avf_op_version (vlib_main_t * vm, avf_device_t * ad,
+		virtchnl_version_info_t * ver)
+{
+  clib_error_t *err = 0;
+  virtchnl_version_info_t myver = {
+    .major = VIRTCHNL_VERSION_MAJOR,
+    .minor = VIRTCHNL_VERSION_MINOR,
+  };
+
+  err = avf_send_to_pf (vm, ad, VIRTCHNL_OP_VERSION, &myver,
+			sizeof (virtchnl_version_info_t), ver,
+			sizeof (virtchnl_version_info_t));
+
+  if (err)
+    return err;
+
+  return err;
+}
+
+clib_error_t *
+avf_op_get_vf_resources (vlib_main_t * vm, avf_device_t * ad,
+			 virtchnl_vf_resource_t * res)
+{
+  clib_error_t *err = 0;
+  u32 bitmap = (VIRTCHNL_VF_OFFLOAD_L2 | VIRTCHNL_VF_OFFLOAD_RSS_AQ |
+		VIRTCHNL_VF_OFFLOAD_RSS_REG | VIRTCHNL_VF_OFFLOAD_WB_ON_ITR |
+		VIRTCHNL_VF_OFFLOAD_VLAN | VIRTCHNL_VF_OFFLOAD_RX_POLLING);
+
+  err = avf_send_to_pf (vm, ad, VIRTCHNL_OP_GET_VF_RESOURCES, &bitmap,
+			sizeof (u32), res, sizeof (virtchnl_vf_resource_t));
+
+  if (err)
+    return err;
+
+  return err;
+}
+
+clib_error_t *
+avf_op_disable_vlan_stripping (vlib_main_t * vm, avf_device_t * ad)
+{
+  return avf_send_to_pf (vm, ad, VIRTCHNL_OP_DISABLE_VLAN_STRIPPING, 0, 0, 0,
+			 0);
+}
+
+clib_error_t *
+avf_config_promisc_mode (vlib_main_t * vm, avf_device_t * ad)
+{
+  virtchnl_promisc_info_t pi = { 0 };
+
+  pi.vsi_id = ad->vsi_id;
+  pi.flags = 1;
+  return avf_send_to_pf (vm, ad, VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE, &pi,
+			 sizeof (virtchnl_promisc_info_t), 0, 0);
+}
+
+
+clib_error_t *
+avf_op_config_vsi_queues (vlib_main_t * vm, avf_device_t * ad)
+{
+  int i;
+  int n_qp = clib_max (vec_len (ad->rxqs), vec_len (ad->txqs));
+  int msg_len = sizeof (virtchnl_vsi_queue_config_info_t) + n_qp *
+    sizeof (virtchnl_queue_pair_info_t);
+  u8 msg[msg_len];
+  virtchnl_vsi_queue_config_info_t *ci;
+
+  memset (msg, 0, msg_len);
+  ci = (virtchnl_vsi_queue_config_info_t *) msg;
+  ci->vsi_id = ad->vsi_id;
+  ci->num_queue_pairs = n_qp;
+
+  for (i = 0; i < n_qp; i++)
+    {
+      virtchnl_txq_info_t *txq = &ci->qpair[i].txq;
+      virtchnl_rxq_info_t *rxq = &ci->qpair[i].rxq;
+
+      rxq->vsi_id = ad->vsi_id;
+      rxq->queue_id = i;
+      rxq->max_pkt_size = 1518;
+      if (i < vec_len (ad->rxqs))
+	{
+	  avf_rxq_t *q = vec_elt_at_index (ad->rxqs, i);
+	  rxq->ring_len = q->size;
+	  rxq->databuffer_size = VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES;
+	  rxq->dma_ring_addr = avf_dma_addr (vm, ad, q->descs);
+	  avf_reg_write (ad, AVF_QRX_TAIL (i), q->size - 1);
+	}
+
+      avf_txq_t *q = vec_elt_at_index (ad->txqs, i);
+      txq->vsi_id = ad->vsi_id;
+      if (i < vec_len (ad->txqs))
+	{
+	  txq->queue_id = i;
+	  txq->ring_len = q->size;
+	  txq->dma_ring_addr = avf_dma_addr (vm, ad, q->descs);
+	}
+    }
+
+  return avf_send_to_pf (vm, ad, VIRTCHNL_OP_CONFIG_VSI_QUEUES, msg, msg_len,
+			 0, 0);
+}
+
+clib_error_t *
+avf_op_config_irq_map (vlib_main_t * vm, avf_device_t * ad)
+{
+  int count = 1;
+  int msg_len = sizeof (virtchnl_irq_map_info_t) +
+    count * sizeof (virtchnl_vector_map_t);
+  u8 msg[msg_len];
+  virtchnl_irq_map_info_t *imi;
+
+  memset (msg, 0, msg_len);
+  imi = (virtchnl_irq_map_info_t *) msg;
+  imi->num_vectors = count;
+
+  imi->vecmap[0].vector_id = 1;
+  imi->vecmap[0].vsi_id = ad->vsi_id;
+  imi->vecmap[0].rxq_map = 1;
+  return avf_send_to_pf (vm, ad, VIRTCHNL_OP_CONFIG_IRQ_MAP, msg, msg_len, 0,
+			 0);
+}
+
+clib_error_t *
+avf_op_add_eth_addr (vlib_main_t * vm, avf_device_t * ad, u8 count, u8 * macs)
+{
+  int msg_len =
+    sizeof (virtchnl_ether_addr_list_t) +
+    count * sizeof (virtchnl_ether_addr_t);
+  u8 msg[msg_len];
+  virtchnl_ether_addr_list_t *al;
+  int i;
+
+  memset (msg, 0, msg_len);
+  al = (virtchnl_ether_addr_list_t *) msg;
+  al->vsi_id = ad->vsi_id;
+  al->num_elements = count;
+  for (i = 0; i < count; i++)
+    clib_memcpy (&al->list[i].addr, macs + i * 6, 6);
+  return avf_send_to_pf (vm, ad, VIRTCHNL_OP_ADD_ETH_ADDR, msg, msg_len, 0,
+			 0);
+}
+
+clib_error_t *
+avf_op_enable_queues (vlib_main_t * vm, avf_device_t * ad, u32 rx, u32 tx)
+{
+  virtchnl_queue_select_t qs = { 0 };
+  qs.vsi_id = ad->vsi_id;
+  qs.rx_queues = rx;
+  qs.tx_queues = tx;
+  avf_rxq_t *rxq = vec_elt_at_index (ad->rxqs, 0);
+  avf_reg_write (ad, AVF_QRX_TAIL (0), rxq->n_bufs);
+  return avf_send_to_pf (vm, ad, VIRTCHNL_OP_ENABLE_QUEUES, &qs,
+			 sizeof (virtchnl_queue_select_t), 0, 0);
+}
+
+clib_error_t *
+avf_op_get_stats (vlib_main_t * vm, avf_device_t * ad,
+		  virtchnl_eth_stats_t * es)
+{
+  virtchnl_queue_select_t qs = { 0 };
+  qs.vsi_id = ad->vsi_id;
+  return avf_send_to_pf (vm, ad, VIRTCHNL_OP_GET_STATS,
+			 &qs, sizeof (virtchnl_queue_select_t),
+			 es, sizeof (virtchnl_eth_stats_t));
+}
+
+clib_error_t *
+avf_device_reset (vlib_main_t * vm, avf_device_t * ad)
+{
+  avf_aq_desc_t d = { 0 };
+  clib_error_t *error;
+  u32 rstat;
+  int n_retry = 20;
+
+  d.opcode = 0x801;
+  d.v_opcode = VIRTCHNL_OP_RESET_VF;
+  if ((error = avf_aq_desc_enq (vm, ad, &d, 0, 0)))
+    return error;
+
+retry:
+  vlib_process_suspend (vm, 10e-3);
+  rstat = avf_get_u32 (ad->bar0, AVFGEN_RSTAT);
+
+  if (rstat == 2 || rstat == 3)
+    return 0;
+
+  if (--n_retry == 0)
+    return clib_error_return (0, "reset failed (timeout)");
+
+  goto retry;
+}
+
+clib_error_t *
+avf_device_init (vlib_main_t * vm, avf_device_t * ad)
+{
+  virtchnl_version_info_t ver = { 0 };
+  virtchnl_vf_resource_t res = { 0 };
+  clib_error_t *error;
+  vlib_thread_main_t *tm = vlib_get_thread_main ();
+  int i;
+
+  avf_adminq_init (vm, ad);
+
+  if ((error = avf_device_reset (vm, ad)))
+    return error;
+
+  avf_adminq_init (vm, ad);
+
+  /*
+   * OP_VERSION
+   */
+  if ((error = avf_op_version (vm, ad, &ver)))
+    return error;
+
+  if (ver.major != VIRTCHNL_VERSION_MAJOR ||
+      ver.minor != VIRTCHNL_VERSION_MINOR)
+    return clib_error_return (0, "incompatible protocol version "
+			      "(remote %d.%d)", ver.major, ver.minor);
+
+  /*
+   * OP_GET_VF_RESOUCES
+   */
+  if ((error = avf_op_get_vf_resources (vm, ad, &res)))
+    return error;
+
+  if (res.num_vsis != 1 || res.vsi_res[0].vsi_type != VIRTCHNL_VSI_SRIOV)
+    return clib_error_return (0, "unexpected GET_VF_RESOURCE reply received");
+
+  ad->vsi_id = res.vsi_res[0].vsi_id;
+  ad->feature_bitmap = res.vf_offload_flags;
+  ad->num_queue_pairs = res.num_queue_pairs;
+  ad->max_vectors = res.max_vectors;
+  ad->max_mtu = res.max_mtu;
+  ad->rss_key_size = res.rss_key_size;
+  ad->rss_lut_size = res.rss_lut_size;
+
+  clib_memcpy (ad->hwaddr, res.vsi_res[0].default_mac_addr, 6);
+
+  /*
+   * Disable VLAN stripping
+   */
+  if ((error = avf_op_disable_vlan_stripping (vm, ad)))
+    return error;
+
+  if ((error = avf_config_promisc_mode (vm, ad)))
+    return error;
+
+  if ((error = avf_cmd_rx_ctl_reg_write (vm, ad, 0xc400, 0)))
+    return error;
+
+  if ((error = avf_cmd_rx_ctl_reg_write (vm, ad, 0xc404, 0)))
+    return error;
+
+  /*
+   * Init Queues
+   */
+  if ((error = avf_rxq_init (vm, ad, 0)))
+    return error;
+
+  for (i = 0; i < tm->n_vlib_mains; i++)
+    if ((error = avf_txq_init (vm, ad, i)))
+      return error;
+
+  if ((error = avf_op_config_vsi_queues (vm, ad)))
+    return error;
+
+  if ((error = avf_op_config_irq_map (vm, ad)))
+    return error;
+
+  avf_irq_0_enable (ad);
+  avf_irq_n_enable (ad, 0);
+
+  if ((error = avf_op_add_eth_addr (vm, ad, 1, ad->hwaddr)))
+    return error;
+
+  if ((error = avf_op_enable_queues (vm, ad, 1, 0)))
+    return error;
+
+  if ((error = avf_op_enable_queues (vm, ad, 0, 1)))
+    return error;
+
+  ad->flags |= AVF_DEVICE_F_INITIALIZED;
+  return error;
+}
+
+void
+avf_process_one_device (vlib_main_t * vm, avf_device_t * ad, int is_irq)
+{
+  vnet_main_t *vnm = vnet_get_main ();
+  virtchnl_pf_event_t *e;
+  u32 r;
+
+  if (ad->flags & AVF_DEVICE_F_ERROR)
+    return;
+
+  if ((ad->flags & AVF_DEVICE_F_INITIALIZED) == 0)
+    return;
+
+  ASSERT (ad->error == 0);
+
+  r = avf_get_u32 (ad->bar0, AVF_ARQLEN);
+  if ((r & 0xf0000000) != (1 << 31))
+    {
+      ad->error = clib_error_return (0, "arq not enabled, arqlen = 0x%x", r);
+      goto error;
+    }
+
+  r = avf_get_u32 (ad->bar0, AVF_ATQLEN);
+  if ((r & 0xf0000000) != (1 << 31))
+    {
+      ad->error = clib_error_return (0, "atq not enabled, atqlen = 0x%x", r);
+      goto error;
+    }
+
+  if (is_irq == 0)
+    avf_op_get_stats (vm, ad, &ad->eth_stats);
+
+  /* *INDENT-OFF* */
+  vec_foreach (e, ad->events)
+    {
+      if (e->event == VIRTCHNL_EVENT_LINK_CHANGE)
+	{
+	  int link_up = e->event_data.link_event.link_status;
+	  virtchnl_link_speed_t speed = e->event_data.link_event.link_speed;
+	  u32 flags = 0;
+
+	  if (link_up && (ad->flags & AVF_DEVICE_F_LINK_UP) == 0)
+	    {
+	      ad->flags |= AVF_DEVICE_F_LINK_UP;
+	      flags |= (VNET_HW_INTERFACE_FLAG_FULL_DUPLEX |
+			VNET_HW_INTERFACE_FLAG_LINK_UP);
+	      if (speed == VIRTCHNL_LINK_SPEED_40GB)
+		flags |= VNET_HW_INTERFACE_FLAG_SPEED_40G;
+	      else if (speed == VIRTCHNL_LINK_SPEED_25GB)
+		flags |= VNET_HW_INTERFACE_FLAG_SPEED_25G;
+	      else if (speed == VIRTCHNL_LINK_SPEED_10GB)
+		flags |= VNET_HW_INTERFACE_FLAG_SPEED_10G;
+	      else if (speed == VIRTCHNL_LINK_SPEED_1GB)
+		flags |= VNET_HW_INTERFACE_FLAG_SPEED_1G;
+	      else if (speed == VIRTCHNL_LINK_SPEED_100MB)
+		flags |= VNET_HW_INTERFACE_FLAG_SPEED_100M;
+	      vnet_hw_interface_set_flags (vnm, ad->hw_if_index, flags);
+	      ad->link_speed = speed;
+	    }
+	  else if (!link_up && (ad->flags & AVF_DEVICE_F_LINK_UP) != 0)
+	    {
+	      ad->flags &= ~AVF_DEVICE_F_LINK_UP;
+	      ad->link_speed = 0;
+	    }
+
+	  if (ad->flags & AVF_DEVICE_F_ELOG)
+	    {
+	      ELOG_TYPE_DECLARE (el) =
+		{
+		  .format = "avf[%d] link change: link_status %d "
+		    "link_speed %d",
+		  .format_args = "i4i1i1",
+		};
+	      struct
+		{
+		  u32 dev_instance;
+		  u8 link_status;
+		  u8 link_speed;
+		} *ed;
+	      ed = ELOG_DATA (&vm->elog_main, el);
+              ed->dev_instance = ad->dev_instance;
+	      ed->link_status = link_up;
+	      ed->link_speed = speed;
+	    }
+	}
+      else
+	{
+	  if (ad->flags & AVF_DEVICE_F_ELOG)
+	    {
+	      ELOG_TYPE_DECLARE (el) =
+		{
+		  .format = "avf[%d] unknown event: event %d severity %d",
+		  .format_args = "i4i4i1i1",
+		};
+	      struct
+		{
+		  u32 dev_instance;
+		  u32 event;
+		  u32 severity;
+		} *ed;
+	      ed = ELOG_DATA (&vm->elog_main, el);
+              ed->dev_instance = ad->dev_instance;
+	      ed->event = e->event;
+	      ed->severity = e->severity;
+	    }
+	}
+    }
+  /* *INDENT-ON* */
+  vec_reset_length (ad->events);
+
+  return;
+
+error:
+  ad->flags |= AVF_DEVICE_F_ERROR;
+  ASSERT (ad->error != 0);
+}
+
+static u32
+avf_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hw, u32 flags)
+{
+  clib_warning ("TODO");
+  return 0;
+}
+
+static uword
+avf_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
+{
+  avf_main_t *am = &avf_main;
+  avf_device_t *ad;
+  uword *event_data = 0, event_type;
+  int enabled = 0, irq;
+  f64 last_run_duration = 0;
+  f64 last_periodic_time = 0;
+
+  while (1)
+    {
+      if (enabled)
+	vlib_process_wait_for_event_or_clock (vm, 5.0 - last_run_duration);
+      else
+	vlib_process_wait_for_event (vm);
+
+      event_type = vlib_process_get_events (vm, &event_data);
+      vec_reset_length (event_data);
+      irq = 0;
+
+      switch (event_type)
+	{
+	case ~0:
+	  last_periodic_time = vlib_time_now (vm);
+	  break;
+	case AVF_PROCESS_EVENT_START:
+	  enabled = 1;
+	  break;
+	case AVF_PROCESS_EVENT_STOP:
+	  enabled = 0;
+	  continue;
+	case AVF_PROCESS_EVENT_AQ_INT:
+	  irq = 1;
+	  break;
+	default:
+	  ASSERT (0);
+	}
+
+      /* *INDENT-OFF* */
+      pool_foreach (ad, am->devices,
+        {
+	  avf_process_one_device (vm, ad, irq);
+        });
+      /* *INDENT-ON* */
+      last_run_duration = vlib_time_now (vm) - last_periodic_time;
+    }
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (avf_process_node, static)  = {
+  .function = avf_process,
+  .type = VLIB_NODE_TYPE_PROCESS,
+  .name = "avf-process",
+};
+/* *INDENT-ON* */
+
+static void
+avf_irq_0_handler (vlib_pci_dev_handle_t h, u16 line)
+{
+  vlib_main_t *vm = vlib_get_main ();
+  avf_main_t *am = &avf_main;
+  uword pd = vlib_pci_get_private_data (h);
+  avf_device_t *ad = pool_elt_at_index (am->devices, pd);
+  u32 icr0;
+
+  icr0 = avf_reg_read (ad, AVFINT_ICR0);
+
+  if (ad->flags & AVF_DEVICE_F_ELOG)
+    {
+      /* *INDENT-OFF* */
+      ELOG_TYPE_DECLARE (el) =
+	{
+	  .format = "avf[%d] irq 0: icr0 0x%x",
+	  .format_args = "i4i4",
+	};
+      /* *INDENT-ON* */
+      struct
+      {
+	u32 dev_instance;
+	u32 icr0;
+      } *ed;
+
+      ed = ELOG_DATA (&vm->elog_main, el);
+      ed->dev_instance = ad->dev_instance;
+      ed->icr0 = icr0;
+    }
+
+  avf_irq_0_enable (ad);
+
+  /* bit 30 - Send/Receive Admin queue interrupt indication */
+  if (icr0 & (1 << 30))
+    vlib_process_signal_event (vm, avf_process_node.index,
+			       AVF_PROCESS_EVENT_AQ_INT, 0);
+}
+
+static void
+avf_irq_n_handler (vlib_pci_dev_handle_t h, u16 line)
+{
+  vlib_main_t *vm = vlib_get_main ();
+  avf_main_t *am = &avf_main;
+  uword pd = vlib_pci_get_private_data (h);
+  avf_device_t *ad = pool_elt_at_index (am->devices, pd);
+
+  if (ad->flags & AVF_DEVICE_F_ELOG)
+    {
+      /* *INDENT-OFF* */
+      ELOG_TYPE_DECLARE (el) =
+	{
+	  .format = "avf[%d] irq %d: received",
+	  .format_args = "i4i2",
+	};
+      /* *INDENT-ON* */
+      struct
+      {
+	u32 dev_instance;
+	u16 line;
+      } *ed;
+
+      ed = ELOG_DATA (&vm->elog_main, el);
+      ed->dev_instance = ad->dev_instance;
+      ed->line = line;
+    }
+
+  avf_irq_n_enable (ad, 0);
+}
+
+void
+avf_delete_if (vlib_main_t * vm, avf_device_t * ad)
+{
+  vnet_main_t *vnm = vnet_get_main ();
+  avf_main_t *am = &avf_main;
+  int i;
+
+  if (ad->hw_if_index)
+    {
+      vnet_hw_interface_set_flags (vnm, ad->hw_if_index, 0);
+      vnet_hw_interface_unassign_rx_thread (vnm, ad->hw_if_index, 0);
+      ethernet_delete_interface (vnm, ad->hw_if_index);
+    }
+
+  vlib_pci_device_close (ad->pci_dev_handle);
+
+  vlib_physmem_free (vm, am->physmem_region, ad->atq);
+  vlib_physmem_free (vm, am->physmem_region, ad->arq);
+  vlib_physmem_free (vm, am->physmem_region, ad->atq_bufs);
+  vlib_physmem_free (vm, am->physmem_region, ad->arq_bufs);
+
+  /* *INDENT-OFF* */
+  vec_foreach_index (i, ad->rxqs)
+    {
+      avf_rxq_t *rxq = vec_elt_at_index (ad->rxqs, i);
+      vlib_physmem_free (vm, am->physmem_region, rxq->descs);
+      if (rxq->n_bufs)
+	vlib_buffer_free_from_ring (vm, rxq->bufs, rxq->next, rxq->size,
+				    rxq->n_bufs);
+      vec_free (rxq->bufs);
+    }
+  /* *INDENT-ON* */
+  vec_free (ad->rxqs);
+
+  /* *INDENT-OFF* */
+  vec_foreach_index (i, ad->txqs)
+    {
+      avf_txq_t *txq = vec_elt_at_index (ad->txqs, i);
+      vlib_physmem_free (vm, am->physmem_region, txq->descs);
+      if (txq->n_bufs)
+	{
+	  u16 first = (txq->next - txq->n_bufs) & (txq->size -1);
+	  vlib_buffer_free_from_ring (vm, txq->bufs, first, txq->size,
+				      txq->n_bufs);
+	}
+      vec_free (txq->bufs);
+    }
+  /* *INDENT-ON* */
+  vec_free (ad->txqs);
+
+  clib_error_free (ad->error);
+  memset (ad, 0, sizeof (*ad));
+  pool_put (am->devices, ad);
+}
+
+void
+avf_create_if (vlib_main_t * vm, avf_create_if_args_t * args)
+{
+  vnet_main_t *vnm = vnet_get_main ();
+  avf_main_t *am = &avf_main;
+  avf_device_t *ad;
+  vlib_pci_dev_handle_t h;
+  clib_error_t *error = 0;
+
+  pool_get (am->devices, ad);
+  ad->dev_instance = ad - am->devices;
+  ad->per_interface_next_index = ~0;
+
+  if (args->enable_elog)
+    ad->flags |= AVF_DEVICE_F_ELOG;
+
+  if ((error = vlib_pci_device_open (&args->addr, avf_pci_device_ids, &h)))
+    goto error;
+  ad->pci_dev_handle = h;
+
+  vlib_pci_set_private_data (h, ad->dev_instance);
+
+  if ((error = vlib_pci_bus_master_enable (h)))
+    goto error;
+
+  if ((error = vlib_pci_map_region (h, 0, &ad->bar0)))
+    goto error;
+
+  if ((error = vlib_pci_register_msix_handler (h, 0, 1, &avf_irq_0_handler)))
+    goto error;
+
+  if ((error = vlib_pci_register_msix_handler (h, 1, 1, &avf_irq_n_handler)))
+    goto error;
+
+  if ((error = vlib_pci_enable_msix_irq (h, 0, 2)))
+    goto error;
+
+  if (am->physmem_region_alloc == 0)
+    {
+      u32 flags = VLIB_PHYSMEM_F_INIT_MHEAP | VLIB_PHYSMEM_F_HUGETLB;
+      error = vlib_physmem_region_alloc (vm, "avf descriptors", 4 << 20, 0,
+					 flags, &am->physmem_region);
+      if (error)
+	goto error;
+      am->physmem_region_alloc = 1;
+    }
+  ad->atq = vlib_physmem_alloc_aligned (vm, am->physmem_region, &error,
+					sizeof (avf_aq_desc_t) * AVF_MBOX_LEN,
+					64);
+  if (error)
+    goto error;
+
+  ad->arq = vlib_physmem_alloc_aligned (vm, am->physmem_region, &error,
+					sizeof (avf_aq_desc_t) * AVF_MBOX_LEN,
+					64);
+  if (error)
+    goto error;
+
+  ad->atq_bufs = vlib_physmem_alloc_aligned (vm, am->physmem_region, &error,
+					     AVF_MBOX_BUF_SZ * AVF_MBOX_LEN,
+					     64);
+  if (error)
+    goto error;
+
+  ad->arq_bufs = vlib_physmem_alloc_aligned (vm, am->physmem_region, &error,
+					     AVF_MBOX_BUF_SZ * AVF_MBOX_LEN,
+					     64);
+  if (error)
+    goto error;
+
+  if ((error = vlib_pci_intr_enable (h)))
+    goto error;
+
+  /* FIXME detect */
+  ad->flags |= AVF_DEVICE_F_IOVA;
+
+  if ((error = avf_device_init (vm, ad)))
+    goto error;
+
+  /* create interface */
+  error = ethernet_register_interface (vnm, avf_device_class.index,
+				       ad->dev_instance, ad->hwaddr,
+				       &ad->hw_if_index, avf_flag_change);
+
+  if (error)
+    goto error;
+
+  vnet_sw_interface_t *sw = vnet_get_hw_sw_interface (vnm, ad->hw_if_index);
+  ad->sw_if_index = sw->sw_if_index;
+
+  vnet_hw_interface_set_input_node (vnm, ad->hw_if_index,
+				    avf_input_node.index);
+
+  if (pool_elts (am->devices) == 1)
+    vlib_process_signal_event (vm, avf_process_node.index,
+			       AVF_PROCESS_EVENT_START, 0);
+
+  return;
+
+error:
+  avf_delete_if (vm, ad);
+  args->rv = VNET_API_ERROR_INVALID_INTERFACE;
+  args->error = clib_error_return (error, "pci-addr %U",
+				   format_vlib_pci_addr, &args->addr);
+}
+
+static clib_error_t *
+avf_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
+{
+  vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
+  avf_main_t *am = &avf_main;
+  avf_device_t *ad = vec_elt_at_index (am->devices, hi->dev_instance);
+  uword is_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
+
+  if (ad->flags & AVF_DEVICE_F_ERROR)
+    return clib_error_return (0, "device is in error state");
+
+  if (is_up)
+    {
+      vnet_hw_interface_set_flags (vnm, ad->hw_if_index,
+				   VNET_HW_INTERFACE_FLAG_LINK_UP);
+      ad->flags |= AVF_DEVICE_F_ADMIN_UP;
+      vnet_hw_interface_assign_rx_thread (vnm, ad->hw_if_index, 0, ~0);
+    }
+  else
+    {
+      vnet_hw_interface_set_flags (vnm, ad->hw_if_index, 0);
+      ad->flags &= ~AVF_DEVICE_F_ADMIN_UP;
+    }
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VNET_DEVICE_CLASS (avf_device_class,) =
+{
+  .name = "Adaptive Virtual Function (AVF) interface",
+  .tx_function = avf_interface_tx,
+  .format_device = format_avf_device,
+  .format_device_name = format_avf_device_name,
+  .admin_up_down_function = avf_interface_admin_up_down,
+};
+/* *INDENT-ON* */
+
+clib_error_t *
+avf_init (vlib_main_t * vm)
+{
+  avf_main_t *am = &avf_main;
+  clib_error_t *error;
+  vlib_thread_main_t *tm = vlib_get_thread_main ();
+  int i;
+
+  if ((error = vlib_call_init_function (vm, pci_bus_init)))
+    return error;
+
+  vec_validate_aligned (am->per_thread_data, tm->n_vlib_mains - 1,
+			CLIB_CACHE_LINE_BYTES);
+
+  /* initialize ptype based loopup table */
+  vec_validate_aligned (am->ptypes, 255, CLIB_CACHE_LINE_BYTES);
+
+  /* *INDENT-OFF* */
+  vec_foreach_index (i, am->ptypes)
+    {
+      avf_ptype_t *p = vec_elt_at_index (am->ptypes, i);
+      if ((i >= 22) && (i <= 87))
+	{
+	  p->next_node = VNET_DEVICE_INPUT_NEXT_IP4_NCS_INPUT;
+	  p->flags = VNET_BUFFER_F_IS_IP4;
+	}
+      else if ((i >= 88) && (i <= 153))
+	{
+	  p->next_node = VNET_DEVICE_INPUT_NEXT_IP6_INPUT;
+	  p->flags = VNET_BUFFER_F_IS_IP6;
+	}
+      else
+	p->next_node = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
+      p->buffer_advance = device_input_next_node_advance[p->next_node];
+      p->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
+    }
+  /* *INDENT-ON* */
+
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (avf_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */