text: /*******************************************************************************
   *
   * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
   * Copyright(c) 2013 - 2014 Intel Corporation.
   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms and conditions of the GNU General Public License,
   * version 2, as published by the Free Software Foundation.
   *
   * This program is distributed in the hope it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
   * more details.
   *
   * You should have received a copy of the GNU General Public License along
   * with this program.  If not, see <http://www.gnu.org/licenses/>.
   *
   * The full GNU General Public License is included in this distribution in
   * the file called "COPYING".
   *
   * Contact Information:
   * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
   * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
   *
   ******************************************************************************/
  
  #include "i40evf.h"
  #include "i40e_prototype.h"
  
  /* busy wait delay in msec */
  #define I40EVF_BUSY_WAIT_DELAY 10
  #define I40EVF_BUSY_WAIT_COUNT 50
  
  /**
   * i40evf_send_pf_msg
   * @adapter: adapter structure
   * @op: virtual channel opcode
   * @msg: pointer to message buffer
   * @len: message length
   *
   * Send message to PF and print status if failure.
   **/
  static int i40evf_send_pf_msg(struct i40evf_adapter *adapter,
  			      enum i40e_virtchnl_ops op, u8 *msg, u16 len)
  {
  	struct i40e_hw *hw = &adapter->hw;
  	i40e_status err;
  
  	if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
  		return 0; /* nothing to see here, move along */
  
  	err = i40e_aq_send_msg_to_pf(hw, op, 0, msg, len, NULL);
  	if (err)
  		dev_err(&adapter->pdev->dev, "Unable to send opcode %d to PF, error %d, aq status %d\n",
  			op, err, hw->aq.asq_last_status);
  	return err;
  }
  
  /**
   * i40evf_send_api_ver
   * @adapter: adapter structure
   *
   * Send API version admin queue message to the PF. The reply is not checked
   * in this function. Returns 0 if the message was successfully
   * sent, or one of the I40E_ADMIN_QUEUE_ERROR_ statuses if not.
   **/
  int i40evf_send_api_ver(struct i40evf_adapter *adapter)
  {
  	struct i40e_virtchnl_version_info vvi;
  
  	vvi.major = I40E_VIRTCHNL_VERSION_MAJOR;
  	vvi.minor = I40E_VIRTCHNL_VERSION_MINOR;
  
  	return i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_VERSION, (u8 *)&vvi,
  				  sizeof(vvi));
  }
  
  /**
   * i40evf_verify_api_ver
   * @adapter: adapter structure
   *
   * Compare API versions with the PF. Must be called after admin queue is
   * initialized. Returns 0 if API versions match, -EIO if they do not,
   * I40E_ERR_ADMIN_QUEUE_NO_WORK if the admin queue is empty, and any errors
   * from the firmware are propagated.
   **/
  int i40evf_verify_api_ver(struct i40evf_adapter *adapter)
  {
  	struct i40e_virtchnl_version_info *pf_vvi;
  	struct i40e_hw *hw = &adapter->hw;
  	struct i40e_arq_event_info event;
  	i40e_status err;
  
  	event.msg_size = I40EVF_MAX_AQ_BUF_SIZE;
  	event.msg_buf = kzalloc(event.msg_size, GFP_KERNEL);
  	if (!event.msg_buf) {
  		err = -ENOMEM;
  		goto out;
  	}
  
  	err = i40evf_clean_arq_element(hw, &event, NULL);
  	if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
  		goto out_alloc;
  
  	err = (i40e_status)le32_to_cpu(event.desc.cookie_low);
  	if (err)
  		goto out_alloc;
  
  	if ((enum i40e_virtchnl_ops)le32_to_cpu(event.desc.cookie_high) !=
  	    I40E_VIRTCHNL_OP_VERSION) {
  		dev_info(&adapter->pdev->dev, "Invalid reply type %d from PF\n",
  			 le32_to_cpu(event.desc.cookie_high));
  		err = -EIO;
  		goto out_alloc;
  	}
  
  	pf_vvi = (struct i40e_virtchnl_version_info *)event.msg_buf;
  	if ((pf_vvi->major != I40E_VIRTCHNL_VERSION_MAJOR) ||
  	    (pf_vvi->minor != I40E_VIRTCHNL_VERSION_MINOR))
  		err = -EIO;
  
  out_alloc:
  	kfree(event.msg_buf);
  out:
  	return err;
  }
  
  /**
   * i40evf_send_vf_config_msg
   * @adapter: adapter structure
   *
   * Send VF configuration request admin queue message to the PF. The reply
   * is not checked in this function. Returns 0 if the message was
   * successfully sent, or one of the I40E_ADMIN_QUEUE_ERROR_ statuses if not.
   **/
  int i40evf_send_vf_config_msg(struct i40evf_adapter *adapter)
  {
  	return i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_GET_VF_RESOURCES,
  				  NULL, 0);
  }
  
  /**
   * i40evf_get_vf_config
   * @hw: pointer to the hardware structure
   * @len: length of buffer
   *
   * Get VF configuration from PF and populate hw structure. Must be called after
   * admin queue is initialized. Busy waits until response is received from PF,
   * with maximum timeout. Response from PF is returned in the buffer for further
   * processing by the caller.
   **/
  int i40evf_get_vf_config(struct i40evf_adapter *adapter)
  {
  	struct i40e_hw *hw = &adapter->hw;
  	struct i40e_arq_event_info event;
  	u16 len;
  	i40e_status err;
  
  	len =  sizeof(struct i40e_virtchnl_vf_resource) +
  		I40E_MAX_VF_VSI * sizeof(struct i40e_virtchnl_vsi_resource);
  	event.msg_size = len;
  	event.msg_buf = kzalloc(event.msg_size, GFP_KERNEL);
  	if (!event.msg_buf) {
  		err = -ENOMEM;
  		goto out;
  	}
  
  	err = i40evf_clean_arq_element(hw, &event, NULL);
  	if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
  		goto out_alloc;
  
  	err = (i40e_status)le32_to_cpu(event.desc.cookie_low);
  	if (err) {
  		dev_err(&adapter->pdev->dev,
  			"%s: Error returned from PF, %d, %d\n", __func__,
  			le32_to_cpu(event.desc.cookie_high),
  			le32_to_cpu(event.desc.cookie_low));
  		err = -EIO;
  		goto out_alloc;
  	}
  
  	if ((enum i40e_virtchnl_ops)le32_to_cpu(event.desc.cookie_high) !=
  	    I40E_VIRTCHNL_OP_GET_VF_RESOURCES) {
  		dev_err(&adapter->pdev->dev,
  			"%s: Invalid response from PF, %d, %d\n", __func__,
  			le32_to_cpu(event.desc.cookie_high),
  			le32_to_cpu(event.desc.cookie_low));
  		err = -EIO;
  		goto out_alloc;
  	}
  	memcpy(adapter->vf_res, event.msg_buf, min(event.msg_size, len));
  
  	i40e_vf_parse_hw_config(hw, adapter->vf_res);
  out_alloc:
  	kfree(event.msg_buf);
  out:
  	return err;
  }
  
  /**
   * i40evf_configure_queues
   * @adapter: adapter structure
   *
   * Request that the PF set up our (previously allocated) queues.
   **/
  void i40evf_configure_queues(struct i40evf_adapter *adapter)
  {
  	struct i40e_virtchnl_vsi_queue_config_info *vqci;
  	struct i40e_virtchnl_queue_pair_info *vqpi;
  	int pairs = adapter->vsi_res->num_queue_pairs;
  	int i, len;
  
  	if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
  		/* bail because we already have a command pending */
  		dev_err(&adapter->pdev->dev, "%s: command %d pending\n",
  			__func__, adapter->current_op);
  		return;
  	}
  	adapter->current_op = I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES;
  	len = sizeof(struct i40e_virtchnl_vsi_queue_config_info) +
  		       (sizeof(struct i40e_virtchnl_queue_pair_info) * pairs);
  	vqci = kzalloc(len, GFP_ATOMIC);
  	if (!vqci)
  		return;
  
  	vqci->vsi_id = adapter->vsi_res->vsi_id;
  	vqci->num_queue_pairs = pairs;
  	vqpi = vqci->qpair;
  	/* Size check is not needed here - HW max is 16 queue pairs, and we
  	 * can fit info for 31 of them into the AQ buffer before it overflows.
  	 */
  	for (i = 0; i < pairs; i++) {
  		vqpi->txq.vsi_id = vqci->vsi_id;
  		vqpi->txq.queue_id = i;
  		vqpi->txq.ring_len = adapter->tx_rings[i]->count;
  		vqpi->txq.dma_ring_addr = adapter->tx_rings[i]->dma;
  		vqpi->txq.headwb_enabled = 1;
  		vqpi->txq.dma_headwb_addr = vqpi->txq.dma_ring_addr +
  		    (vqpi->txq.ring_len * sizeof(struct i40e_tx_desc));
  
  		vqpi->rxq.vsi_id = vqci->vsi_id;
  		vqpi->rxq.queue_id = i;
  		vqpi->rxq.ring_len = adapter->rx_rings[i]->count;
  		vqpi->rxq.dma_ring_addr = adapter->rx_rings[i]->dma;
  		vqpi->rxq.max_pkt_size = adapter->netdev->mtu
  					+ ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
  		vqpi->rxq.databuffer_size = adapter->rx_rings[i]->rx_buf_len;
  		vqpi++;
  	}
  
  	adapter->aq_pending |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
  	adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
  	i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES,
  			   (u8 *)vqci, len);
  	kfree(vqci);
  }
  
  /**
   * i40evf_enable_queues
   * @adapter: adapter structure
   *
   * Request that the PF enable all of our queues.
   **/
  void i40evf_enable_queues(struct i40evf_adapter *adapter)
  {
  	struct i40e_virtchnl_queue_select vqs;
  
  	if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
  		/* bail because we already have a command pending */
  		dev_err(&adapter->pdev->dev, "%s: command %d pending\n",
  			__func__, adapter->current_op);
  		return;
  	}
  	adapter->current_op = I40E_VIRTCHNL_OP_ENABLE_QUEUES;
  	vqs.vsi_id = adapter->vsi_res->vsi_id;
  	vqs.tx_queues = (1 << adapter->vsi_res->num_queue_pairs) - 1;
  	vqs.rx_queues = vqs.tx_queues;
  	adapter->aq_pending |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
  	adapter->aq_required &= ~I40EVF_FLAG_AQ_ENABLE_QUEUES;
  	i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_ENABLE_QUEUES,
  			   (u8 *)&vqs, sizeof(vqs));
  }
  
  /**
   * i40evf_disable_queues
   * @adapter: adapter structure
   *
   * Request that the PF disable all of our queues.
   **/
  void i40evf_disable_queues(struct i40evf_adapter *adapter)
  {
  	struct i40e_virtchnl_queue_select vqs;
  
  	if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
  		/* bail because we already have a command pending */
  		dev_err(&adapter->pdev->dev, "%s: command %d pending\n",
  			__func__, adapter->current_op);
  		return;
  	}
  	adapter->current_op = I40E_VIRTCHNL_OP_DISABLE_QUEUES;
  	vqs.vsi_id = adapter->vsi_res->vsi_id;
  	vqs.tx_queues = (1 << adapter->vsi_res->num_queue_pairs) - 1;
  	vqs.rx_queues = vqs.tx_queues;
  	adapter->aq_pending |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
  	adapter->aq_required &= ~I40EVF_FLAG_AQ_DISABLE_QUEUES;
  	i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_DISABLE_QUEUES,
  			   (u8 *)&vqs, sizeof(vqs));
  }
  
  /**
   * i40evf_map_queues
   * @adapter: adapter structure
   *
   * Request that the PF map queues to interrupt vectors. Misc causes, including
   * admin queue, are always mapped to vector 0.
   **/
  void i40evf_map_queues(struct i40evf_adapter *adapter)
  {
  	struct i40e_virtchnl_irq_map_info *vimi;
  	int v_idx, q_vectors, len;
  	struct i40e_q_vector *q_vector;
  
  	if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
  		/* bail because we already have a command pending */
  		dev_err(&adapter->pdev->dev, "%s: command %d pending\n",
  			__func__, adapter->current_op);
  		return;
  	}
  	adapter->current_op = I40E_VIRTCHNL_OP_CONFIG_IRQ_MAP;
  
  	q_vectors = adapter->num_msix_vectors - NONQ_VECS;
  
  	len = sizeof(struct i40e_virtchnl_irq_map_info) +
  	      (adapter->num_msix_vectors *
  		sizeof(struct i40e_virtchnl_vector_map));
  	vimi = kzalloc(len, GFP_ATOMIC);
  	if (!vimi)
  		return;
  
  	vimi->num_vectors = adapter->num_msix_vectors;
  	/* Queue vectors first */
  	for (v_idx = 0; v_idx < q_vectors; v_idx++) {
  		q_vector = adapter->q_vector[v_idx];
  		vimi->vecmap[v_idx].vsi_id = adapter->vsi_res->vsi_id;
  		vimi->vecmap[v_idx].vector_id = v_idx + NONQ_VECS;
  		vimi->vecmap[v_idx].txq_map = q_vector->ring_mask;
  		vimi->vecmap[v_idx].rxq_map = q_vector->ring_mask;
  	}
  	/* Misc vector last - this is only for AdminQ messages */
  	vimi->vecmap[v_idx].vsi_id = adapter->vsi_res->vsi_id;
  	vimi->vecmap[v_idx].vector_id = 0;
  	vimi->vecmap[v_idx].txq_map = 0;
  	vimi->vecmap[v_idx].rxq_map = 0;
  
  	adapter->aq_pending |= I40EVF_FLAG_AQ_MAP_VECTORS;
  	adapter->aq_required &= ~I40EVF_FLAG_AQ_MAP_VECTORS;
  	i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_CONFIG_IRQ_MAP,
  			   (u8 *)vimi, len);
  	kfree(vimi);
  }
  
  /**
   * i40evf_add_ether_addrs
   * @adapter: adapter structure
   * @addrs: the MAC address filters to add (contiguous)
   * @count: number of filters
   *
   * Request that the PF add one or more addresses to our filters.
   **/
  void i40evf_add_ether_addrs(struct i40evf_adapter *adapter)
  {
  	struct i40e_virtchnl_ether_addr_list *veal;
  	int len, i = 0, count = 0;
  	struct i40evf_mac_filter *f;
  
  	if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
  		/* bail because we already have a command pending */
  		dev_err(&adapter->pdev->dev, "%s: command %d pending\n",
  			__func__, adapter->current_op);
  		return;
  	}
  	list_for_each_entry(f, &adapter->mac_filter_list, list) {
  		if (f->add)
  			count++;
  	}
  	if (!count) {
  		adapter->aq_required &= ~I40EVF_FLAG_AQ_ADD_MAC_FILTER;
  		return;
  	}
  	adapter->current_op = I40E_VIRTCHNL_OP_ADD_ETHER_ADDRESS;
  
  	len = sizeof(struct i40e_virtchnl_ether_addr_list) +
  	      (count * sizeof(struct i40e_virtchnl_ether_addr));
  	if (len > I40EVF_MAX_AQ_BUF_SIZE) {
  		dev_warn(&adapter->pdev->dev, "%s: Too many MAC address changes in one request\n",
  			__func__);
  		count = (I40EVF_MAX_AQ_BUF_SIZE -
  			 sizeof(struct i40e_virtchnl_ether_addr_list)) /
  			sizeof(struct i40e_virtchnl_ether_addr);
  		len = I40EVF_MAX_AQ_BUF_SIZE;
  	}
  
  	veal = kzalloc(len, GFP_ATOMIC);
  	if (!veal)
  		return;
  
  	veal->vsi_id = adapter->vsi_res->vsi_id;
  	veal->num_elements = count;
  	list_for_each_entry(f, &adapter->mac_filter_list, list) {
  		if (f->add) {
  			ether_addr_copy(veal->list[i].addr, f->macaddr);
  			i++;
  			f->add = false;
  		}
  	}
  	adapter->aq_pending |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
  	adapter->aq_required &= ~I40EVF_FLAG_AQ_ADD_MAC_FILTER;
  	i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_ADD_ETHER_ADDRESS,
  			   (u8 *)veal, len);
  	kfree(veal);
  }
  
  /**
   * i40evf_del_ether_addrs
   * @adapter: adapter structure
   * @addrs: the MAC address filters to remove (contiguous)
   * @count: number of filtes
   *
   * Request that the PF remove one or more addresses from our filters.
   **/
  void i40evf_del_ether_addrs(struct i40evf_adapter *adapter)
  {
  	struct i40e_virtchnl_ether_addr_list *veal;
  	struct i40evf_mac_filter *f, *ftmp;
  	int len, i = 0, count = 0;
  
  	if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
  		/* bail because we already have a command pending */
  		dev_err(&adapter->pdev->dev, "%s: command %d pending\n",
  			__func__, adapter->current_op);
  		return;
  	}
  	list_for_each_entry(f, &adapter->mac_filter_list, list) {
  		if (f->remove)
  			count++;
  	}
  	if (!count) {
  		adapter->aq_required &= ~I40EVF_FLAG_AQ_DEL_MAC_FILTER;
  		return;
  	}
  	adapter->current_op = I40E_VIRTCHNL_OP_DEL_ETHER_ADDRESS;
  
  	len = sizeof(struct i40e_virtchnl_ether_addr_list) +
  	      (count * sizeof(struct i40e_virtchnl_ether_addr));
  	if (len > I40EVF_MAX_AQ_BUF_SIZE) {
  		dev_warn(&adapter->pdev->dev, "%s: Too many MAC address changes in one request\n",
  			__func__);
  		count = (I40EVF_MAX_AQ_BUF_SIZE -
  			 sizeof(struct i40e_virtchnl_ether_addr_list)) /
  			sizeof(struct i40e_virtchnl_ether_addr);
  		len = I40EVF_MAX_AQ_BUF_SIZE;
  	}
  	veal = kzalloc(len, GFP_ATOMIC);
  	if (!veal)
  		return;
  
  	veal->vsi_id = adapter->vsi_res->vsi_id;
  	veal->num_elements = count;
  	list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
  		if (f->remove) {
  			ether_addr_copy(veal->list[i].addr, f->macaddr);
  			i++;
  			list_del(&f->list);
  			kfree(f);
  		}
  	}
  	adapter->aq_pending |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
  	adapter->aq_required &= ~I40EVF_FLAG_AQ_DEL_MAC_FILTER;
  	i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_DEL_ETHER_ADDRESS,
  			   (u8 *)veal, len);
  	kfree(veal);
  }
  
  /**
   * i40evf_add_vlans
   * @adapter: adapter structure
   * @vlans: the VLANs to add
   * @count: number of VLANs
   *
   * Request that the PF add one or more VLAN filters to our VSI.
   **/
  void i40evf_add_vlans(struct i40evf_adapter *adapter)
  {
  	struct i40e_virtchnl_vlan_filter_list *vvfl;
  	int len, i = 0, count = 0;
  	struct i40evf_vlan_filter *f;
  
  	if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
  		/* bail because we already have a command pending */
  		dev_err(&adapter->pdev->dev, "%s: command %d pending\n",
  			__func__, adapter->current_op);
  		return;
  	}
  
  	list_for_each_entry(f, &adapter->vlan_filter_list, list) {
  		if (f->add)
  			count++;
  	}
  	if (!count) {
  		adapter->aq_required &= ~I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
  		return;
  	}
  	adapter->current_op = I40E_VIRTCHNL_OP_ADD_VLAN;
  
  	len = sizeof(struct i40e_virtchnl_vlan_filter_list) +
  	      (count * sizeof(u16));
  	if (len > I40EVF_MAX_AQ_BUF_SIZE) {
  		dev_warn(&adapter->pdev->dev, "%s: Too many VLAN changes in one request\n",
  			__func__);
  		count = (I40EVF_MAX_AQ_BUF_SIZE -
  			 sizeof(struct i40e_virtchnl_vlan_filter_list)) /
  			sizeof(u16);
  		len = I40EVF_MAX_AQ_BUF_SIZE;
  	}
  	vvfl = kzalloc(len, GFP_ATOMIC);
  	if (!vvfl)
  		return;
  
  	vvfl->vsi_id = adapter->vsi_res->vsi_id;
  	vvfl->num_elements = count;
  	list_for_each_entry(f, &adapter->vlan_filter_list, list) {
  		if (f->add) {
  			vvfl->vlan_id[i] = f->vlan;
  			i++;
  			f->add = false;
  		}
  	}
  	adapter->aq_pending |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
  	adapter->aq_required &= ~I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
  	i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_ADD_VLAN, (u8 *)vvfl, len);
  	kfree(vvfl);
  }
  
  /**
   * i40evf_del_vlans
   * @adapter: adapter structure
   * @vlans: the VLANs to remove
   * @count: number of VLANs
   *
   * Request that the PF remove one or more VLAN filters from our VSI.
   **/
  void i40evf_del_vlans(struct i40evf_adapter *adapter)
  {
  	struct i40e_virtchnl_vlan_filter_list *vvfl;
  	struct i40evf_vlan_filter *f, *ftmp;
  	int len, i = 0, count = 0;
  
  	if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
  		/* bail because we already have a command pending */
  		dev_err(&adapter->pdev->dev, "%s: command %d pending\n",
  			__func__, adapter->current_op);
  		return;
  	}
  
  	list_for_each_entry(f, &adapter->vlan_filter_list, list) {
  		if (f->remove)
  			count++;
  	}
  	if (!count) {
  		adapter->aq_required &= ~I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
  		return;
  	}
  	adapter->current_op = I40E_VIRTCHNL_OP_DEL_VLAN;
  
  	len = sizeof(struct i40e_virtchnl_vlan_filter_list) +
  	      (count * sizeof(u16));
  	if (len > I40EVF_MAX_AQ_BUF_SIZE) {
  		dev_warn(&adapter->pdev->dev, "%s: Too many VLAN changes in one request\n",
  			__func__);
  		count = (I40EVF_MAX_AQ_BUF_SIZE -
  			 sizeof(struct i40e_virtchnl_vlan_filter_list)) /
  			sizeof(u16);
  		len = I40EVF_MAX_AQ_BUF_SIZE;
  	}
  	vvfl = kzalloc(len, GFP_ATOMIC);
  	if (!vvfl)
  		return;
  
  	vvfl->vsi_id = adapter->vsi_res->vsi_id;
  	vvfl->num_elements = count;
  	list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
  		if (f->remove) {
  			vvfl->vlan_id[i] = f->vlan;
  			i++;
  			list_del(&f->list);
  			kfree(f);
  		}
  	}
  	adapter->aq_pending |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
  	adapter->aq_required &= ~I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
  	i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_DEL_VLAN, (u8 *)vvfl, len);
  	kfree(vvfl);
  }
  
  /**
   * i40evf_set_promiscuous
   * @adapter: adapter structure
   * @flags: bitmask to control unicast/multicast promiscuous.
   *
   * Request that the PF enable promiscuous mode for our VSI.
   **/
  void i40evf_set_promiscuous(struct i40evf_adapter *adapter, int flags)
  {
  	struct i40e_virtchnl_promisc_info vpi;
  
  	if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
  		/* bail because we already have a command pending */
  		dev_err(&adapter->pdev->dev, "%s: command %d pending\n",
  			__func__, adapter->current_op);
  		return;
  	}
  	adapter->current_op = I40E_VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE;
  	vpi.vsi_id = adapter->vsi_res->vsi_id;
  	vpi.flags = flags;
  	i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE,
  			   (u8 *)&vpi, sizeof(vpi));
  }
  
  /**
   * i40evf_request_stats
   * @adapter: adapter structure
   *
   * Request VSI statistics from PF.
   **/
  void i40evf_request_stats(struct i40evf_adapter *adapter)
  {
  	struct i40e_virtchnl_queue_select vqs;
  	if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
  		/* no error message, this isn't crucial */
  		return;
  	}
  	adapter->current_op = I40E_VIRTCHNL_OP_GET_STATS;
  	vqs.vsi_id = adapter->vsi_res->vsi_id;
  	/* queue maps are ignored for this message - only the vsi is used */
  	if (i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_GET_STATS,
  			       (u8 *)&vqs, sizeof(vqs)))
  		/* if the request failed, don't lock out others */
  		adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
  }
  /**
   * i40evf_request_reset
   * @adapter: adapter structure
   *
   * Request that the PF reset this VF. No response is expected.
   **/
  void i40evf_request_reset(struct i40evf_adapter *adapter)
  {
  	/* Don't check CURRENT_OP - this is always higher priority */
  	i40evf_send_pf_msg(adapter, I40E_VIRTCHNL_OP_RESET_VF, NULL, 0);
  	adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
  }
  
  /**
   * i40evf_virtchnl_completion
   * @adapter: adapter structure
   * @v_opcode: opcode sent by PF
   * @v_retval: retval sent by PF
   * @msg: message sent by PF
   * @msglen: message length
   *
   * Asynchronous completion function for admin queue messages. Rather than busy
   * wait, we fire off our requests and assume that no errors will be returned.
   * This function handles the reply messages.
   **/
  void i40evf_virtchnl_completion(struct i40evf_adapter *adapter,
  				enum i40e_virtchnl_ops v_opcode,
  				i40e_status v_retval,
  				u8 *msg, u16 msglen)
  {
  	struct net_device *netdev = adapter->netdev;
  
  	if (v_opcode == I40E_VIRTCHNL_OP_EVENT) {
  		struct i40e_virtchnl_pf_event *vpe =
  			(struct i40e_virtchnl_pf_event *)msg;
  		switch (vpe->event) {
  		case I40E_VIRTCHNL_EVENT_LINK_CHANGE:
  			adapter->link_up =
  				vpe->event_data.link_event.link_status;
  			if (adapter->link_up && !netif_carrier_ok(netdev)) {
  				dev_info(&adapter->pdev->dev, "NIC Link is Up\n");
  				netif_carrier_on(netdev);
  				netif_tx_wake_all_queues(netdev);
  			} else if (!adapter->link_up) {
  				dev_info(&adapter->pdev->dev, "NIC Link is Down\n");
  				netif_carrier_off(netdev);
  				netif_tx_stop_all_queues(netdev);
  			}
  			break;
  		case I40E_VIRTCHNL_EVENT_RESET_IMPENDING:
  			dev_info(&adapter->pdev->dev, "PF reset warning received\n");
  			if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING)) {
  				adapter->flags |= I40EVF_FLAG_RESET_PENDING;
  				dev_info(&adapter->pdev->dev, "Scheduling reset task\n");
  				schedule_work(&adapter->reset_task);
  			}
  			break;
  		default:
  			dev_err(&adapter->pdev->dev,
  				"%s: Unknown event %d from pf\n",
  				__func__, vpe->event);
  			break;
  
  		}
  		return;
  	}
  	if (v_opcode != adapter->current_op) {
  		dev_err(&adapter->pdev->dev, "%s: Pending op is %d, received %d\n",
  			__func__, adapter->current_op, v_opcode);
  		/* We're probably completely screwed at this point, but clear
  		 * the current op and try to carry on....
  		 */
  		adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
  		return;
  	}
  	if (v_retval) {
  		dev_err(&adapter->pdev->dev, "%s: PF returned error %d to our request %d\n",
  			__func__, v_retval, v_opcode);
  	}
  	switch (v_opcode) {
  	case I40E_VIRTCHNL_OP_GET_STATS: {
  		struct i40e_eth_stats *stats =
  			(struct i40e_eth_stats *)msg;
  		adapter->net_stats.rx_packets = stats->rx_unicast +
  						 stats->rx_multicast +
  						 stats->rx_broadcast;
  		adapter->net_stats.tx_packets = stats->tx_unicast +
  						 stats->tx_multicast +
  						 stats->tx_broadcast;
  		adapter->net_stats.rx_bytes = stats->rx_bytes;
  		adapter->net_stats.tx_bytes = stats->tx_bytes;
  		adapter->net_stats.tx_errors = stats->tx_errors;
  		adapter->net_stats.rx_dropped = stats->rx_discards;
  		adapter->net_stats.tx_dropped = stats->tx_discards;
  		adapter->current_stats = *stats;
  		}
  		break;
  	case I40E_VIRTCHNL_OP_ADD_ETHER_ADDRESS:
  		adapter->aq_pending &= ~(I40EVF_FLAG_AQ_ADD_MAC_FILTER);
  		break;
  	case I40E_VIRTCHNL_OP_DEL_ETHER_ADDRESS:
  		adapter->aq_pending &= ~(I40EVF_FLAG_AQ_DEL_MAC_FILTER);
  		break;
  	case I40E_VIRTCHNL_OP_ADD_VLAN:
  		adapter->aq_pending &= ~(I40EVF_FLAG_AQ_ADD_VLAN_FILTER);
  		break;
  	case I40E_VIRTCHNL_OP_DEL_VLAN:
  		adapter->aq_pending &= ~(I40EVF_FLAG_AQ_DEL_VLAN_FILTER);
  		break;
  	case I40E_VIRTCHNL_OP_ENABLE_QUEUES:
  		adapter->aq_pending &= ~(I40EVF_FLAG_AQ_ENABLE_QUEUES);
  		/* enable transmits */
  		i40evf_irq_enable(adapter, true);
  		netif_tx_start_all_queues(adapter->netdev);
  		netif_carrier_on(adapter->netdev);
  		break;
  	case I40E_VIRTCHNL_OP_DISABLE_QUEUES:
  		adapter->aq_pending &= ~(I40EVF_FLAG_AQ_DISABLE_QUEUES);
  		break;
  	case I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES:
  		adapter->aq_pending &= ~(I40EVF_FLAG_AQ_CONFIGURE_QUEUES);
  		break;
  	case I40E_VIRTCHNL_OP_CONFIG_IRQ_MAP:
  		adapter->aq_pending &= ~(I40EVF_FLAG_AQ_MAP_VECTORS);
  		break;
  	default:
  		dev_warn(&adapter->pdev->dev, "%s: Received unexpected message %d from PF\n",
  			__func__, v_opcode);
  		break;
  	} /* switch v_opcode */
  	adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
  }
  