text: /* QLogic qede NIC Driver
   * Copyright (c) 2015-2017  QLogic Corporation
   *
   * This software is available to you under a choice of one of two
   * licenses.  You may choose to be licensed under the terms of the GNU
   * General Public License (GPL) Version 2, available from the file
   * COPYING in the main directory of this source tree, or the
   * OpenIB.org BSD license below:
   *
   *     Redistribution and use in source and binary forms, with or
   *     without modification, are permitted provided that the following
   *     conditions are met:
   *
   *      - Redistributions of source code must retain the above
   *        copyright notice, this list of conditions and the following
   *        disclaimer.
   *
   *      - Redistributions in binary form must reproduce the above
   *        copyright notice, this list of conditions and the following
   *        disclaimer in the documentation and /or other materials
   *        provided with the distribution.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
   * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
   * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   */
  #include <linux/netdevice.h>
  #include <linux/etherdevice.h>
  #include <net/udp_tunnel.h>
  #include <linux/bitops.h>
  #include <linux/vmalloc.h>
  
  #include <linux/qed/qed_if.h>
  #include "qede.h"
  
  #define QEDE_FILTER_PRINT_MAX_LEN	(64)
  struct qede_arfs_tuple {
  	union {
  		__be32 src_ipv4;
  		struct in6_addr src_ipv6;
  	};
  	union {
  		__be32 dst_ipv4;
  		struct in6_addr dst_ipv6;
  	};
  	__be16  src_port;
  	__be16  dst_port;
  	__be16  eth_proto;
  	u8      ip_proto;
  
  	/* Describe filtering mode needed for this kind of filter */
  	enum qed_filter_config_mode mode;
  
  	/* Used to compare new/old filters. Return true if IPs match */
  	bool (*ip_comp)(struct qede_arfs_tuple *a, struct qede_arfs_tuple *b);
  
  	/* Given an address into ethhdr build a header from tuple info */
  	void (*build_hdr)(struct qede_arfs_tuple *t, void *header);
  
  	/* Stringify the tuple for a print into the provided buffer */
  	void (*stringify)(struct qede_arfs_tuple *t, void *buffer);
  };
  
  struct qede_arfs_fltr_node {
  #define QEDE_FLTR_VALID	 0
  	unsigned long state;
  
  	/* pointer to aRFS packet buffer */
  	void *data;
  
  	/* dma map address of aRFS packet buffer */
  	dma_addr_t mapping;
  
  	/* length of aRFS packet buffer */
  	int buf_len;
  
  	/* tuples to hold from aRFS packet buffer */
  	struct qede_arfs_tuple tuple;
  
  	u32 flow_id;
  	u64 sw_id;
  	u16 rxq_id;
  	u16 next_rxq_id;
  	u8 vfid;
  	bool filter_op;
  	bool used;
  	u8 fw_rc;
  	bool b_is_drop;
  	struct hlist_node node;
  };
  
  struct qede_arfs {
  #define QEDE_ARFS_BUCKET_HEAD(edev, idx) (&(edev)->arfs->arfs_hl_head[idx])
  #define QEDE_ARFS_POLL_COUNT	100
  #define QEDE_RFS_FLW_BITSHIFT	(4)
  #define QEDE_RFS_FLW_MASK	((1 << QEDE_RFS_FLW_BITSHIFT) - 1)
  	struct hlist_head	arfs_hl_head[1 << QEDE_RFS_FLW_BITSHIFT];
  
  	/* lock for filter list access */
  	spinlock_t		arfs_list_lock;
  	unsigned long		*arfs_fltr_bmap;
  	int			filter_count;
  
  	/* Currently configured filtering mode */
  	enum qed_filter_config_mode mode;
  };
  
  static void qede_configure_arfs_fltr(struct qede_dev *edev,
  				     struct qede_arfs_fltr_node *n,
  				     u16 rxq_id, bool add_fltr)
  {
  	const struct qed_eth_ops *op = edev->ops;
  	struct qed_ntuple_filter_params params;
  
  	if (n->used)
  		return;
  
  	memset(&params, 0, sizeof(params));
  
  	params.addr = n->mapping;
  	params.length = n->buf_len;
  	params.qid = rxq_id;
  	params.b_is_add = add_fltr;
  	params.b_is_drop = n->b_is_drop;
  
  	if (n->vfid) {
  		params.b_is_vf = true;
  		params.vf_id = n->vfid - 1;
  	}
  
  	if (n->tuple.stringify) {
  		char tuple_buffer[QEDE_FILTER_PRINT_MAX_LEN];
  
  		n->tuple.stringify(&n->tuple, tuple_buffer);
  		DP_VERBOSE(edev, NETIF_MSG_RX_STATUS,
  			   "%s sw_id[0x%llx]: %s [vf %u queue %d]\n",
  			   add_fltr ? "Adding" : "Deleting",
  			   n->sw_id, tuple_buffer, n->vfid, rxq_id);
  	}
  
  	n->used = true;
  	n->filter_op = add_fltr;
  	op->ntuple_filter_config(edev->cdev, n, &params);
  }
  
  static void
  qede_free_arfs_filter(struct qede_dev *edev,  struct qede_arfs_fltr_node *fltr)
  {
  	kfree(fltr->data);
  
  	if (fltr->sw_id < QEDE_RFS_MAX_FLTR)
  		clear_bit(fltr->sw_id, edev->arfs->arfs_fltr_bmap);
  
  	kfree(fltr);
  }
  
  static int
  qede_enqueue_fltr_and_config_searcher(struct qede_dev *edev,
  				      struct qede_arfs_fltr_node *fltr,
  				      u16 bucket_idx)
  {
  	fltr->mapping = dma_map_single(&edev->pdev->dev, fltr->data,
  				       fltr->buf_len, DMA_TO_DEVICE);
  	if (dma_mapping_error(&edev->pdev->dev, fltr->mapping)) {
  		DP_NOTICE(edev, "Failed to map DMA memory for rule\n");
  		qede_free_arfs_filter(edev, fltr);
  		return -ENOMEM;
  	}
  
  	INIT_HLIST_NODE(&fltr->node);
  	hlist_add_head(&fltr->node,
  		       QEDE_ARFS_BUCKET_HEAD(edev, bucket_idx));
  
  	edev->arfs->filter_count++;
  	if (edev->arfs->filter_count == 1 &&
  	    edev->arfs->mode == QED_FILTER_CONFIG_MODE_DISABLE) {
  		edev->ops->configure_arfs_searcher(edev->cdev,
  						   fltr->tuple.mode);
  		edev->arfs->mode = fltr->tuple.mode;
  	}
  
  	return 0;
  }
  
  static void
  qede_dequeue_fltr_and_config_searcher(struct qede_dev *edev,
  				      struct qede_arfs_fltr_node *fltr)
  {
  	hlist_del(&fltr->node);
  	dma_unmap_single(&edev->pdev->dev, fltr->mapping,
  			 fltr->buf_len, DMA_TO_DEVICE);
  
  	qede_free_arfs_filter(edev, fltr);
  
  	edev->arfs->filter_count--;
  	if (!edev->arfs->filter_count &&
  	    edev->arfs->mode != QED_FILTER_CONFIG_MODE_DISABLE) {
  		enum qed_filter_config_mode mode;
  
  		mode = QED_FILTER_CONFIG_MODE_DISABLE;
  		edev->ops->configure_arfs_searcher(edev->cdev, mode);
  		edev->arfs->mode = QED_FILTER_CONFIG_MODE_DISABLE;
  	}
  }
  
  void qede_arfs_filter_op(void *dev, void *filter, u8 fw_rc)
  {
  	struct qede_arfs_fltr_node *fltr = filter;
  	struct qede_dev *edev = dev;
  
  	fltr->fw_rc = fw_rc;
  
  	if (fw_rc) {
  		DP_NOTICE(edev,
  			  "Failed arfs filter configuration fw_rc=%d, flow_id=%d, sw_id=0x%llx, src_port=%d, dst_port=%d, rxq=%d\n",
  			  fw_rc, fltr->flow_id, fltr->sw_id,
  			  ntohs(fltr->tuple.src_port),
  			  ntohs(fltr->tuple.dst_port), fltr->rxq_id);
  
  		spin_lock_bh(&edev->arfs->arfs_list_lock);
  
  		fltr->used = false;
  		clear_bit(QEDE_FLTR_VALID, &fltr->state);
  
  		spin_unlock_bh(&edev->arfs->arfs_list_lock);
  		return;
  	}
  
  	spin_lock_bh(&edev->arfs->arfs_list_lock);
  
  	fltr->used = false;
  
  	if (fltr->filter_op) {
  		set_bit(QEDE_FLTR_VALID, &fltr->state);
  		if (fltr->rxq_id != fltr->next_rxq_id)
  			qede_configure_arfs_fltr(edev, fltr, fltr->rxq_id,
  						 false);
  	} else {
  		clear_bit(QEDE_FLTR_VALID, &fltr->state);
  		if (fltr->rxq_id != fltr->next_rxq_id) {
  			fltr->rxq_id = fltr->next_rxq_id;
  			qede_configure_arfs_fltr(edev, fltr,
  						 fltr->rxq_id, true);
  		}
  	}
  
  	spin_unlock_bh(&edev->arfs->arfs_list_lock);
  }
  
  /* Should be called while qede_lock is held */
  void qede_process_arfs_filters(struct qede_dev *edev, bool free_fltr)
  {
  	int i;
  
  	for (i = 0; i <= QEDE_RFS_FLW_MASK; i++) {
  		struct hlist_node *temp;
  		struct hlist_head *head;
  		struct qede_arfs_fltr_node *fltr;
  
  		head = &edev->arfs->arfs_hl_head[i];
  
  		hlist_for_each_entry_safe(fltr, temp, head, node) {
  			bool del = false;
  
  			if (edev->state != QEDE_STATE_OPEN)
  				del = true;
  
  			spin_lock_bh(&edev->arfs->arfs_list_lock);
  
  			if ((!test_bit(QEDE_FLTR_VALID, &fltr->state) &&
  			     !fltr->used) || free_fltr) {
  				qede_dequeue_fltr_and_config_searcher(edev,
  								      fltr);
  			} else {
  				bool flow_exp = false;
  #ifdef CONFIG_RFS_ACCEL
  				flow_exp = rps_may_expire_flow(edev->ndev,
  							       fltr->rxq_id,
  							       fltr->flow_id,
  							       fltr->sw_id);
  #endif
  				if ((flow_exp || del) && !free_fltr)
  					qede_configure_arfs_fltr(edev, fltr,
  								 fltr->rxq_id,
  								 false);
  			}
  
  			spin_unlock_bh(&edev->arfs->arfs_list_lock);
  		}
  	}
  
  #ifdef CONFIG_RFS_ACCEL
  	spin_lock_bh(&edev->arfs->arfs_list_lock);
  
  	if (edev->arfs->filter_count) {
  		set_bit(QEDE_SP_ARFS_CONFIG, &edev->sp_flags);
  		schedule_delayed_work(&edev->sp_task,
  				      QEDE_SP_TASK_POLL_DELAY);
  	}
  
  	spin_unlock_bh(&edev->arfs->arfs_list_lock);
  #endif
  }
  
  /* This function waits until all aRFS filters get deleted and freed.
   * On timeout it frees all filters forcefully.
   */
  void qede_poll_for_freeing_arfs_filters(struct qede_dev *edev)
  {
  	int count = QEDE_ARFS_POLL_COUNT;
  
  	while (count) {
  		qede_process_arfs_filters(edev, false);
  
  		if (!edev->arfs->filter_count)
  			break;
  
  		msleep(100);
  		count--;
  	}
  
  	if (!count) {
  		DP_NOTICE(edev, "Timeout in polling for arfs filter free\n");
  
  		/* Something is terribly wrong, free forcefully */
  		qede_process_arfs_filters(edev, true);
  	}
  }
  
  int qede_alloc_arfs(struct qede_dev *edev)
  {
  	int i;
  
  	edev->arfs = vzalloc(sizeof(*edev->arfs));
  	if (!edev->arfs)
  		return -ENOMEM;
  
  	spin_lock_init(&edev->arfs->arfs_list_lock);
  
  	for (i = 0; i <= QEDE_RFS_FLW_MASK; i++)
  		INIT_HLIST_HEAD(QEDE_ARFS_BUCKET_HEAD(edev, i));
  
  	edev->arfs->arfs_fltr_bmap =
  		vzalloc(array_size(sizeof(long),
  				   BITS_TO_LONGS(QEDE_RFS_MAX_FLTR)));
  	if (!edev->arfs->arfs_fltr_bmap) {
  		vfree(edev->arfs);
  		edev->arfs = NULL;
  		return -ENOMEM;
  	}
  
  #ifdef CONFIG_RFS_ACCEL
  	edev->ndev->rx_cpu_rmap = alloc_irq_cpu_rmap(QEDE_RSS_COUNT(edev));
  	if (!edev->ndev->rx_cpu_rmap) {
  		vfree(edev->arfs->arfs_fltr_bmap);
  		edev->arfs->arfs_fltr_bmap = NULL;
  		vfree(edev->arfs);
  		edev->arfs = NULL;
  		return -ENOMEM;
  	}
  #endif
  	return 0;
  }
  
  void qede_free_arfs(struct qede_dev *edev)
  {
  	if (!edev->arfs)
  		return;
  
  #ifdef CONFIG_RFS_ACCEL
  	if (edev->ndev->rx_cpu_rmap)
  		free_irq_cpu_rmap(edev->ndev->rx_cpu_rmap);
  
  	edev->ndev->rx_cpu_rmap = NULL;
  #endif
  	vfree(edev->arfs->arfs_fltr_bmap);
  	edev->arfs->arfs_fltr_bmap = NULL;
  	vfree(edev->arfs);
  	edev->arfs = NULL;
  }
  
  #ifdef CONFIG_RFS_ACCEL
  static bool qede_compare_ip_addr(struct qede_arfs_fltr_node *tpos,
  				 const struct sk_buff *skb)
  {
  	if (skb->protocol == htons(ETH_P_IP)) {
  		if (tpos->tuple.src_ipv4 == ip_hdr(skb)->saddr &&
  		    tpos->tuple.dst_ipv4 == ip_hdr(skb)->daddr)
  			return true;
  		else
  			return false;
  	} else {
  		struct in6_addr *src = &tpos->tuple.src_ipv6;
  		u8 size = sizeof(struct in6_addr);
  
  		if (!memcmp(src, &ipv6_hdr(skb)->saddr, size) &&
  		    !memcmp(&tpos->tuple.dst_ipv6, &ipv6_hdr(skb)->daddr, size))
  			return true;
  		else
  			return false;
  	}
  }
  
  static struct qede_arfs_fltr_node *
  qede_arfs_htbl_key_search(struct hlist_head *h, const struct sk_buff *skb,
  			  __be16 src_port, __be16 dst_port, u8 ip_proto)
  {
  	struct qede_arfs_fltr_node *tpos;
  
  	hlist_for_each_entry(tpos, h, node)
  		if (tpos->tuple.ip_proto == ip_proto &&
  		    tpos->tuple.eth_proto == skb->protocol &&
  		    qede_compare_ip_addr(tpos, skb) &&
  		    tpos->tuple.src_port == src_port &&
  		    tpos->tuple.dst_port == dst_port)
  			return tpos;
  
  	return NULL;
  }
  
  static struct qede_arfs_fltr_node *
  qede_alloc_filter(struct qede_dev *edev, int min_hlen)
  {
  	struct qede_arfs_fltr_node *n;
  	int bit_id;
  
  	bit_id = find_first_zero_bit(edev->arfs->arfs_fltr_bmap,
  				     QEDE_RFS_MAX_FLTR);
  
  	if (bit_id >= QEDE_RFS_MAX_FLTR)
  		return NULL;
  
  	n = kzalloc(sizeof(*n), GFP_ATOMIC);
  	if (!n)
  		return NULL;
  
  	n->data = kzalloc(min_hlen, GFP_ATOMIC);
  	if (!n->data) {
  		kfree(n);
  		return NULL;
  	}
  
  	n->sw_id = (u16)bit_id;
  	set_bit(bit_id, edev->arfs->arfs_fltr_bmap);
  	return n;
  }
  
  int qede_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
  		       u16 rxq_index, u32 flow_id)
  {
  	struct qede_dev *edev = netdev_priv(dev);
  	struct qede_arfs_fltr_node *n;
  	int min_hlen, rc, tp_offset;
  	struct ethhdr *eth;
  	__be16 *ports;
  	u16 tbl_idx;
  	u8 ip_proto;
  
  	if (skb->encapsulation)
  		return -EPROTONOSUPPORT;
  
  	if (skb->protocol != htons(ETH_P_IP) &&
  	    skb->protocol != htons(ETH_P_IPV6))
  		return -EPROTONOSUPPORT;
  
  	if (skb->protocol == htons(ETH_P_IP)) {
  		ip_proto = ip_hdr(skb)->protocol;
  		tp_offset = sizeof(struct iphdr);
  	} else {
  		ip_proto = ipv6_hdr(skb)->nexthdr;
  		tp_offset = sizeof(struct ipv6hdr);
  	}
  
  	if (ip_proto != IPPROTO_TCP && ip_proto != IPPROTO_UDP)
  		return -EPROTONOSUPPORT;
  
  	ports = (__be16 *)(skb->data + tp_offset);
  	tbl_idx = skb_get_hash_raw(skb) & QEDE_RFS_FLW_MASK;
  
  	spin_lock_bh(&edev->arfs->arfs_list_lock);
  
  	n = qede_arfs_htbl_key_search(QEDE_ARFS_BUCKET_HEAD(edev, tbl_idx),
  				      skb, ports[0], ports[1], ip_proto);
  	if (n) {
  		/* Filter match */
  		n->next_rxq_id = rxq_index;
  
  		if (test_bit(QEDE_FLTR_VALID, &n->state)) {
  			if (n->rxq_id != rxq_index)
  				qede_configure_arfs_fltr(edev, n, n->rxq_id,
  							 false);
  		} else {
  			if (!n->used) {
  				n->rxq_id = rxq_index;
  				qede_configure_arfs_fltr(edev, n, n->rxq_id,
  							 true);
  			}
  		}
  
  		rc = n->sw_id;
  		goto ret_unlock;
  	}
  
  	min_hlen = ETH_HLEN + skb_headlen(skb);
  
  	n = qede_alloc_filter(edev, min_hlen);
  	if (!n) {
  		rc = -ENOMEM;
  		goto ret_unlock;
  	}
  
  	n->buf_len = min_hlen;
  	n->rxq_id = rxq_index;
  	n->next_rxq_id = rxq_index;
  	n->tuple.src_port = ports[0];
  	n->tuple.dst_port = ports[1];
  	n->flow_id = flow_id;
  
  	if (skb->protocol == htons(ETH_P_IP)) {
  		n->tuple.src_ipv4 = ip_hdr(skb)->saddr;
  		n->tuple.dst_ipv4 = ip_hdr(skb)->daddr;
  	} else {
  		memcpy(&n->tuple.src_ipv6, &ipv6_hdr(skb)->saddr,
  		       sizeof(struct in6_addr));
  		memcpy(&n->tuple.dst_ipv6, &ipv6_hdr(skb)->daddr,
  		       sizeof(struct in6_addr));
  	}
  
  	eth = (struct ethhdr *)n->data;
  	eth->h_proto = skb->protocol;
  	n->tuple.eth_proto = skb->protocol;
  	n->tuple.ip_proto = ip_proto;
  	n->tuple.mode = QED_FILTER_CONFIG_MODE_5_TUPLE;
  	memcpy(n->data + ETH_HLEN, skb->data, skb_headlen(skb));
  
  	rc = qede_enqueue_fltr_and_config_searcher(edev, n, tbl_idx);
  	if (rc)
  		goto ret_unlock;
  
  	qede_configure_arfs_fltr(edev, n, n->rxq_id, true);
  
  	spin_unlock_bh(&edev->arfs->arfs_list_lock);
  
  	set_bit(QEDE_SP_ARFS_CONFIG, &edev->sp_flags);
  	schedule_delayed_work(&edev->sp_task, 0);
  
  	return n->sw_id;
  
  ret_unlock:
  	spin_unlock_bh(&edev->arfs->arfs_list_lock);
  	return rc;
  }
  #endif
  
  void qede_udp_ports_update(void *dev, u16 vxlan_port, u16 geneve_port)
  {
  	struct qede_dev *edev = dev;
  
  	if (edev->vxlan_dst_port != vxlan_port)
  		edev->vxlan_dst_port = 0;
  
  	if (edev->geneve_dst_port != geneve_port)
  		edev->geneve_dst_port = 0;
  }
  
  void qede_force_mac(void *dev, u8 *mac, bool forced)
  {
  	struct qede_dev *edev = dev;
  
  	__qede_lock(edev);
  
  	if (!is_valid_ether_addr(mac)) {
  		__qede_unlock(edev);
  		return;
  	}
  
  	ether_addr_copy(edev->ndev->dev_addr, mac);
  	__qede_unlock(edev);
  }
  
  void qede_fill_rss_params(struct qede_dev *edev,
  			  struct qed_update_vport_rss_params *rss, u8 *update)
  {
  	bool need_reset = false;
  	int i;
  
  	if (QEDE_RSS_COUNT(edev) <= 1) {
  		memset(rss, 0, sizeof(*rss));
  		*update = 0;
  		return;
  	}
  
  	/* Need to validate current RSS config uses valid entries */
  	for (i = 0; i < QED_RSS_IND_TABLE_SIZE; i++) {
  		if (edev->rss_ind_table[i] >= QEDE_RSS_COUNT(edev)) {
  			need_reset = true;
  			break;
  		}
  	}
  
  	if (!(edev->rss_params_inited & QEDE_RSS_INDIR_INITED) || need_reset) {
  		for (i = 0; i < QED_RSS_IND_TABLE_SIZE; i++) {
  			u16 indir_val, val;
  
  			val = QEDE_RSS_COUNT(edev);
  			indir_val = ethtool_rxfh_indir_default(i, val);
  			edev->rss_ind_table[i] = indir_val;
  		}
  		edev->rss_params_inited |= QEDE_RSS_INDIR_INITED;
  	}
  
  	/* Now that we have the queue-indirection, prepare the handles */
  	for (i = 0; i < QED_RSS_IND_TABLE_SIZE; i++) {
  		u16 idx = QEDE_RX_QUEUE_IDX(edev, edev->rss_ind_table[i]);
  
  		rss->rss_ind_table[i] = edev->fp_array[idx].rxq->handle;
  	}
  
  	if (!(edev->rss_params_inited & QEDE_RSS_KEY_INITED)) {
  		netdev_rss_key_fill(edev->rss_key, sizeof(edev->rss_key));
  		edev->rss_params_inited |= QEDE_RSS_KEY_INITED;
  	}
  	memcpy(rss->rss_key, edev->rss_key, sizeof(rss->rss_key));
  
  	if (!(edev->rss_params_inited & QEDE_RSS_CAPS_INITED)) {
  		edev->rss_caps = QED_RSS_IPV4 | QED_RSS_IPV6 |
  		    QED_RSS_IPV4_TCP | QED_RSS_IPV6_TCP;
  		edev->rss_params_inited |= QEDE_RSS_CAPS_INITED;
  	}
  	rss->rss_caps = edev->rss_caps;
  
  	*update = 1;
  }
  
  static int qede_set_ucast_rx_mac(struct qede_dev *edev,
  				 enum qed_filter_xcast_params_type opcode,
  				 unsigned char mac[ETH_ALEN])
  {
  	struct qed_filter_params filter_cmd;
  
  	memset(&filter_cmd, 0, sizeof(filter_cmd));
  	filter_cmd.type = QED_FILTER_TYPE_UCAST;
  	filter_cmd.filter.ucast.type = opcode;
  	filter_cmd.filter.ucast.mac_valid = 1;
  	ether_addr_copy(filter_cmd.filter.ucast.mac, mac);
  
  	return edev->ops->filter_config(edev->cdev, &filter_cmd);
  }
  
  static int qede_set_ucast_rx_vlan(struct qede_dev *edev,
  				  enum qed_filter_xcast_params_type opcode,
  				  u16 vid)
  {
  	struct qed_filter_params filter_cmd;
  
  	memset(&filter_cmd, 0, sizeof(filter_cmd));
  	filter_cmd.type = QED_FILTER_TYPE_UCAST;
  	filter_cmd.filter.ucast.type = opcode;
  	filter_cmd.filter.ucast.vlan_valid = 1;
  	filter_cmd.filter.ucast.vlan = vid;
  
  	return edev->ops->filter_config(edev->cdev, &filter_cmd);
  }
  
  static int qede_config_accept_any_vlan(struct qede_dev *edev, bool action)
  {
  	struct qed_update_vport_params *params;
  	int rc;
  
  	/* Proceed only if action actually needs to be performed */
  	if (edev->accept_any_vlan == action)
  		return 0;
  
  	params = vzalloc(sizeof(*params));
  	if (!params)
  		return -ENOMEM;
  
  	params->vport_id = 0;
  	params->accept_any_vlan = action;
  	params->update_accept_any_vlan_flg = 1;
  
  	rc = edev->ops->vport_update(edev->cdev, params);
  	if (rc) {
  		DP_ERR(edev, "Failed to %s accept-any-vlan\n",
  		       action ? "enable" : "disable");
  	} else {
  		DP_INFO(edev, "%s accept-any-vlan\n",
  			action ? "enabled" : "disabled");
  		edev->accept_any_vlan = action;
  	}
  
  	vfree(params);
  	return 0;
  }
  
  int qede_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
  {
  	struct qede_dev *edev = netdev_priv(dev);
  	struct qede_vlan *vlan, *tmp;
  	int rc = 0;
  
  	DP_VERBOSE(edev, NETIF_MSG_IFUP, "Adding vlan 0x%04x\n", vid);
  
  	vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
  	if (!vlan) {
  		DP_INFO(edev, "Failed to allocate struct for vlan\n");
  		return -ENOMEM;
  	}
  	INIT_LIST_HEAD(&vlan->list);
  	vlan->vid = vid;
  	vlan->configured = false;
  
  	/* Verify vlan isn't already configured */
  	list_for_each_entry(tmp, &edev->vlan_list, list) {
  		if (tmp->vid == vlan->vid) {
  			DP_VERBOSE(edev, (NETIF_MSG_IFUP | NETIF_MSG_IFDOWN),
  				   "vlan already configured\n");
  			kfree(vlan);
  			return -EEXIST;
  		}
  	}
  
  	/* If interface is down, cache this VLAN ID and return */
  	__qede_lock(edev);
  	if (edev->state != QEDE_STATE_OPEN) {
  		DP_VERBOSE(edev, NETIF_MSG_IFDOWN,
  			   "Interface is down, VLAN %d will be configured when interface is up\n",
  			   vid);
  		if (vid != 0)
  			edev->non_configured_vlans++;
  		list_add(&vlan->list, &edev->vlan_list);
  		goto out;
  	}
  
  	/* Check for the filter limit.
  	 * Note - vlan0 has a reserved filter and can be added without
  	 * worrying about quota
  	 */
  	if ((edev->configured_vlans < edev->dev_info.num_vlan_filters) ||
  	    (vlan->vid == 0)) {
  		rc = qede_set_ucast_rx_vlan(edev,
  					    QED_FILTER_XCAST_TYPE_ADD,
  					    vlan->vid);
  		if (rc) {
  			DP_ERR(edev, "Failed to configure VLAN %d\n",
  			       vlan->vid);
  			kfree(vlan);
  			goto out;
  		}
  		vlan->configured = true;
  
  		/* vlan0 filter isn't consuming out of our quota */
  		if (vlan->vid != 0)
  			edev->configured_vlans++;
  	} else {
  		/* Out of quota; Activate accept-any-VLAN mode */
  		if (!edev->non_configured_vlans) {
  			rc = qede_config_accept_any_vlan(edev, true);
  			if (rc) {
  				kfree(vlan);
  				goto out;
  			}
  		}
  
  		edev->non_configured_vlans++;
  	}
  
  	list_add(&vlan->list, &edev->vlan_list);
  
  out:
  	__qede_unlock(edev);
  	return rc;
  }
  
  static void qede_del_vlan_from_list(struct qede_dev *edev,
  				    struct qede_vlan *vlan)
  {
  	/* vlan0 filter isn't consuming out of our quota */
  	if (vlan->vid != 0) {
  		if (vlan->configured)
  			edev->configured_vlans--;
  		else
  			edev->non_configured_vlans--;
  	}
  
  	list_del(&vlan->list);
  	kfree(vlan);
  }
  
  int qede_configure_vlan_filters(struct qede_dev *edev)
  {
  	int rc = 0, real_rc = 0, accept_any_vlan = 0;
  	struct qed_dev_eth_info *dev_info;
  	struct qede_vlan *vlan = NULL;
  
  	if (list_empty(&edev->vlan_list))
  		return 0;
  
  	dev_info = &edev->dev_info;
  
  	/* Configure non-configured vlans */
  	list_for_each_entry(vlan, &edev->vlan_list, list) {
  		if (vlan->configured)
  			continue;
  
  		/* We have used all our credits, now enable accept_any_vlan */
  		if ((vlan->vid != 0) &&
  		    (edev->configured_vlans == dev_info->num_vlan_filters)) {
  			accept_any_vlan = 1;
  			continue;
  		}
  
  		DP_VERBOSE(edev, NETIF_MSG_IFUP, "Adding vlan %d\n", vlan->vid);
  
  		rc = qede_set_ucast_rx_vlan(edev, QED_FILTER_XCAST_TYPE_ADD,
  					    vlan->vid);
  		if (rc) {
  			DP_ERR(edev, "Failed to configure VLAN %u\n",
  			       vlan->vid);
  			real_rc = rc;
  			continue;
  		}
  
  		vlan->configured = true;
  		/* vlan0 filter doesn't consume our VLAN filter's quota */
  		if (vlan->vid != 0) {
  			edev->non_configured_vlans--;
  			edev->configured_vlans++;
  		}
  	}
  
  	/* enable accept_any_vlan mode if we have more VLANs than credits,
  	 * or remove accept_any_vlan mode if we've actually removed
  	 * a non-configured vlan, and all remaining vlans are truly configured.
  	 */
  
  	if (accept_any_vlan)
  		rc = qede_config_accept_any_vlan(edev, true);
  	else if (!edev->non_configured_vlans)
  		rc = qede_config_accept_any_vlan(edev, false);
  
  	if (rc && !real_rc)
  		real_rc = rc;
  
  	return real_rc;
  }
  
  int qede_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
  {
  	struct qede_dev *edev = netdev_priv(dev);
  	struct qede_vlan *vlan = NULL;
  	int rc = 0;
  
  	DP_VERBOSE(edev, NETIF_MSG_IFDOWN, "Removing vlan 0x%04x\n", vid);
  
  	/* Find whether entry exists */
  	__qede_lock(edev);
  	list_for_each_entry(vlan, &edev->vlan_list, list)
  		if (vlan->vid == vid)
  			break;
  
  	if (!vlan || (vlan->vid != vid)) {
  		DP_VERBOSE(edev, (NETIF_MSG_IFUP | NETIF_MSG_IFDOWN),
  			   "Vlan isn't configured\n");
  		goto out;
  	}
  
  	if (edev->state != QEDE_STATE_OPEN) {
  		/* As interface is already down, we don't have a VPORT
  		 * instance to remove vlan filter. So just update vlan list
  		 */
  		DP_VERBOSE(edev, NETIF_MSG_IFDOWN,
  			   "Interface is down, removing VLAN from list only\n");
  		qede_del_vlan_from_list(edev, vlan);
  		goto out;
  	}
  
  	/* Remove vlan */
  	if (vlan->configured) {
  		rc = qede_set_ucast_rx_vlan(edev, QED_FILTER_XCAST_TYPE_DEL,
  					    vid);
  		if (rc) {
  			DP_ERR(edev, "Failed to remove VLAN %d\n", vid);
  			goto out;
  		}
  	}
  
  	qede_del_vlan_from_list(edev, vlan);
  
  	/* We have removed a VLAN - try to see if we can
  	 * configure non-configured VLAN from the list.
  	 */
  	rc = qede_configure_vlan_filters(edev);
  
  out:
  	__qede_unlock(edev);
  	return rc;
  }
  
  void qede_vlan_mark_nonconfigured(struct qede_dev *edev)
  {
  	struct qede_vlan *vlan = NULL;
  
  	if (list_empty(&edev->vlan_list))
  		return;
  
  	list_for_each_entry(vlan, &edev->vlan_list, list) {
  		if (!vlan->configured)
  			continue;
  
  		vlan->configured = false;
  
  		/* vlan0 filter isn't consuming out of our quota */
  		if (vlan->vid != 0) {
  			edev->non_configured_vlans++;
  			edev->configured_vlans--;
  		}
  
  		DP_VERBOSE(edev, NETIF_MSG_IFDOWN,
  			   "marked vlan %d as non-configured\n", vlan->vid);
  	}
  
  	edev->accept_any_vlan = false;
  }
  
  static void qede_set_features_reload(struct qede_dev *edev,
  				     struct qede_reload_args *args)
  {
  	edev->ndev->features = args->u.features;
  }
  
  netdev_features_t qede_fix_features(struct net_device *dev,
  				    netdev_features_t features)
  {
  	struct qede_dev *edev = netdev_priv(dev);
  
  	if (edev->xdp_prog || edev->ndev->mtu > PAGE_SIZE ||
  	    !(features & NETIF_F_GRO))
  		features &= ~NETIF_F_GRO_HW;
  
  	return features;
  }
  
  int qede_set_features(struct net_device *dev, netdev_features_t features)
  {
  	struct qede_dev *edev = netdev_priv(dev);
  	netdev_features_t changes = features ^ dev->features;
  	bool need_reload = false;
  
  	if (changes & NETIF_F_GRO_HW)
  		need_reload = true;
  
  	if (need_reload) {
  		struct qede_reload_args args;
  
  		args.u.features = features;
  		args.func = &qede_set_features_reload;
  
  		/* Make sure that we definitely need to reload.
  		 * In case of an eBPF attached program, there will be no FW
  		 * aggregations, so no need to actually reload.
  		 */
  		__qede_lock(edev);
  		if (edev->xdp_prog)
  			args.func(edev, &args);
  		else
  			qede_reload(edev, &args, true);
  		__qede_unlock(edev);
  
  		return 1;
  	}
  
  	return 0;
  }
  
  void qede_udp_tunnel_add(struct net_device *dev, struct udp_tunnel_info *ti)
  {
  	struct qede_dev *edev = netdev_priv(dev);
  	struct qed_tunn_params tunn_params;
  	u16 t_port = ntohs(ti->port);
  	int rc;
  
  	memset(&tunn_params, 0, sizeof(tunn_params));
  
  	switch (ti->type) {
  	case UDP_TUNNEL_TYPE_VXLAN:
  		if (!edev->dev_info.common.vxlan_enable)
  			return;
  
  		if (edev->vxlan_dst_port)
  			return;
  
  		tunn_params.update_vxlan_port = 1;
  		tunn_params.vxlan_port = t_port;
  
  		__qede_lock(edev);
  		rc = edev->ops->tunn_config(edev->cdev, &tunn_params);
  		__qede_unlock(edev);
  
  		if (!rc) {
  			edev->vxlan_dst_port = t_port;
  			DP_VERBOSE(edev, QED_MSG_DEBUG, "Added vxlan port=%d\n",
  				   t_port);
  		} else {
  			DP_NOTICE(edev, "Failed to add vxlan UDP port=%d\n",
  				  t_port);
  		}
  
  		break;
  	case UDP_TUNNEL_TYPE_GENEVE:
  		if (!edev->dev_info.common.geneve_enable)
  			return;
  
  		if (edev->geneve_dst_port)
  			return;
  
  		tunn_params.update_geneve_port = 1;
  		tunn_params.geneve_port = t_port;
  
  		__qede_lock(edev);
  		rc = edev->ops->tunn_config(edev->cdev, &tunn_params);
  		__qede_unlock(edev);
  
  		if (!rc) {
  			edev->geneve_dst_port = t_port;
  			DP_VERBOSE(edev, QED_MSG_DEBUG,
  				   "Added geneve port=%d\n", t_port);
  		} else {
  			DP_NOTICE(edev, "Failed to add geneve UDP port=%d\n",
  				  t_port);
  		}
  
  		break;
  	default:
  		return;
  	}
  }
  
  void qede_udp_tunnel_del(struct net_device *dev,
  			 struct udp_tunnel_info *ti)
  {
  	struct qede_dev *edev = netdev_priv(dev);
  	struct qed_tunn_params tunn_params;
  	u16 t_port = ntohs(ti->port);
  
  	memset(&tunn_params, 0, sizeof(tunn_params));
  
  	switch (ti->type) {
  	case UDP_TUNNEL_TYPE_VXLAN:
  		if (t_port != edev->vxlan_dst_port)
  			return;
  
  		tunn_params.update_vxlan_port = 1;
  		tunn_params.vxlan_port = 0;
  
  		__qede_lock(edev);
  		edev->ops->tunn_config(edev->cdev, &tunn_params);
  		__qede_unlock(edev);
  
  		edev->vxlan_dst_port = 0;
  
  		DP_VERBOSE(edev, QED_MSG_DEBUG, "Deleted vxlan port=%d\n",
  			   t_port);
  
  		break;
  	case UDP_TUNNEL_TYPE_GENEVE:
  		if (t_port != edev->geneve_dst_port)
  			return;
  
  		tunn_params.update_geneve_port = 1;
  		tunn_params.geneve_port = 0;
  
  		__qede_lock(edev);
  		edev->ops->tunn_config(edev->cdev, &tunn_params);
  		__qede_unlock(edev);
  
  		edev->geneve_dst_port = 0;
  
  		DP_VERBOSE(edev, QED_MSG_DEBUG, "Deleted geneve port=%d\n",
  			   t_port);
  		break;
  	default:
  		return;
  	}
  }
  
  static void qede_xdp_reload_func(struct qede_dev *edev,
  				 struct qede_reload_args *args)
  {
  	struct bpf_prog *old;
  
  	old = xchg(&edev->xdp_prog, args->u.new_prog);
  	if (old)
  		bpf_prog_put(old);
  }
  
  static int qede_xdp_set(struct qede_dev *edev, struct bpf_prog *prog)
  {
  	struct qede_reload_args args;
  
  	/* If we're called, there was already a bpf reference increment */
  	args.func = &qede_xdp_reload_func;
  	args.u.new_prog = prog;
  	qede_reload(edev, &args, false);
  
  	return 0;
  }
  
  int qede_xdp(struct net_device *dev, struct netdev_bpf *xdp)
  {
  	struct qede_dev *edev = netdev_priv(dev);
  
  	switch (xdp->command) {
  	case XDP_SETUP_PROG:
  		return qede_xdp_set(edev, xdp->prog);
  	case XDP_QUERY_PROG:
  		xdp->prog_id = edev->xdp_prog ? edev->xdp_prog->aux->id : 0;
  		return 0;
  	default:
  		return -EINVAL;
  	}
  }
  
  static int qede_set_mcast_rx_mac(struct qede_dev *edev,
  				 enum qed_filter_xcast_params_type opcode,
  				 unsigned char *mac, int num_macs)
  {
  	struct qed_filter_params filter_cmd;
  	int i;
  
  	memset(&filter_cmd, 0, sizeof(filter_cmd));
  	filter_cmd.type = QED_FILTER_TYPE_MCAST;
  	filter_cmd.filter.mcast.type = opcode;
  	filter_cmd.filter.mcast.num = num_macs;
  
  	for (i = 0; i < num_macs; i++, mac += ETH_ALEN)
  		ether_addr_copy(filter_cmd.filter.mcast.mac[i], mac);
  
  	return edev->ops->filter_config(edev->cdev, &filter_cmd);
  }
  
  int qede_set_mac_addr(struct net_device *ndev, void *p)
  {
  	struct qede_dev *edev = netdev_priv(ndev);
  	struct sockaddr *addr = p;
  	int rc = 0;
  
  	/* Make sure the state doesn't transition while changing the MAC.
  	 * Also, all flows accessing the dev_addr field are doing that under
  	 * this lock.
  	 */
  	__qede_lock(edev);
  
  	if (!is_valid_ether_addr(addr->sa_data)) {
  		DP_NOTICE(edev, "The MAC address is not valid\n");
  		rc = -EFAULT;
  		goto out;
  	}
  
  	if (!edev->ops->check_mac(edev->cdev, addr->sa_data)) {
  		DP_NOTICE(edev, "qed prevents setting MAC %pM\n",
  			  addr->sa_data);
  		rc = -EINVAL;
  		goto out;
  	}
  
  	if (edev->state == QEDE_STATE_OPEN) {
  		/* Remove the previous primary mac */
  		rc = qede_set_ucast_rx_mac(edev, QED_FILTER_XCAST_TYPE_DEL,
  					   ndev->dev_addr);
  		if (rc)
  			goto out;
  	}
  
  	ether_addr_copy(ndev->dev_addr, addr->sa_data);
  	DP_INFO(edev, "Setting device MAC to %pM\n", addr->sa_data);
  
  	if (edev->state != QEDE_STATE_OPEN) {
  		DP_VERBOSE(edev, NETIF_MSG_IFDOWN,
  			   "The device is currently down\n");
  		/* Ask PF to explicitly update a copy in bulletin board */
  		if (IS_VF(edev) && edev->ops->req_bulletin_update_mac)
  			edev->ops->req_bulletin_update_mac(edev->cdev,
  							   ndev->dev_addr);
  		goto out;
  	}
  
  	edev->ops->common->update_mac(edev->cdev, ndev->dev_addr);
  
  	rc = qede_set_ucast_rx_mac(edev, QED_FILTER_XCAST_TYPE_ADD,
  				   ndev->dev_addr);
  out:
  	__qede_unlock(edev);
  	return rc;
  }
  
  static int
  qede_configure_mcast_filtering(struct net_device *ndev,
  			       enum qed_filter_rx_mode_type *accept_flags)
  {
  	struct qede_dev *edev = netdev_priv(ndev);
  	unsigned char *mc_macs, *temp;
  	struct netdev_hw_addr *ha;
  	int rc = 0, mc_count;
  	size_t size;
  
  	size = 64 * ETH_ALEN;
  
  	mc_macs = kzalloc(size, GFP_KERNEL);
  	if (!mc_macs) {
  		DP_NOTICE(edev,
  			  "Failed to allocate memory for multicast MACs\n");
  		rc = -ENOMEM;
  		goto exit;
  	}
  
  	temp = mc_macs;
  
  	/* Remove all previously configured MAC filters */
  	rc = qede_set_mcast_rx_mac(edev, QED_FILTER_XCAST_TYPE_DEL,
  				   mc_macs, 1);
  	if (rc)
  		goto exit;
  
  	netif_addr_lock_bh(ndev);
  
  	mc_count = netdev_mc_count(ndev);
  	if (mc_count <= 64) {
  		netdev_for_each_mc_addr(ha, ndev) {
  			ether_addr_copy(temp, ha->addr);
  			temp += ETH_ALEN;
  		}
  	}
  
  	netif_addr_unlock_bh(ndev);
  
  	/* Check for all multicast @@@TBD resource allocation */
  	if ((ndev->flags & IFF_ALLMULTI) || (mc_count > 64)) {
  		if (*accept_flags == QED_FILTER_RX_MODE_TYPE_REGULAR)
  			*accept_flags = QED_FILTER_RX_MODE_TYPE_MULTI_PROMISC;
  	} else {
  		/* Add all multicast MAC filters */
  		rc = qede_set_mcast_rx_mac(edev, QED_FILTER_XCAST_TYPE_ADD,
  					   mc_macs, mc_count);
  	}
  
  exit:
  	kfree(mc_macs);
  	return rc;
  }
  
  void qede_set_rx_mode(struct net_device *ndev)
  {
  	struct qede_dev *edev = netdev_priv(ndev);
  
  	set_bit(QEDE_SP_RX_MODE, &edev->sp_flags);
  	schedule_delayed_work(&edev->sp_task, 0);
  }
  
  /* Must be called with qede_lock held */
  void qede_config_rx_mode(struct net_device *ndev)
  {
  	enum qed_filter_rx_mode_type accept_flags;
  	struct qede_dev *edev = netdev_priv(ndev);
  	struct qed_filter_params rx_mode;
  	unsigned char *uc_macs, *temp;
  	struct netdev_hw_addr *ha;
  	int rc, uc_count;
  	size_t size;
  
  	netif_addr_lock_bh(ndev);
  
  	uc_count = netdev_uc_count(ndev);
  	size = uc_count * ETH_ALEN;
  
  	uc_macs = kzalloc(size, GFP_ATOMIC);
  	if (!uc_macs) {
  		DP_NOTICE(edev, "Failed to allocate memory for unicast MACs\n");
  		netif_addr_unlock_bh(ndev);
  		return;
  	}
  
  	temp = uc_macs;
  	netdev_for_each_uc_addr(ha, ndev) {
  		ether_addr_copy(temp, ha->addr);
  		temp += ETH_ALEN;
  	}
  
  	netif_addr_unlock_bh(ndev);
  
  	/* Configure the struct for the Rx mode */
  	memset(&rx_mode, 0, sizeof(struct qed_filter_params));
  	rx_mode.type = QED_FILTER_TYPE_RX_MODE;
  
  	/* Remove all previous unicast secondary macs and multicast macs
  	 * (configure / leave the primary mac)
  	 */
  	rc = qede_set_ucast_rx_mac(edev, QED_FILTER_XCAST_TYPE_REPLACE,
  				   edev->ndev->dev_addr);
  	if (rc)
  		goto out;
  
  	/* Check for promiscuous */
  	if (ndev->flags & IFF_PROMISC)
  		accept_flags = QED_FILTER_RX_MODE_TYPE_PROMISC;
  	else
  		accept_flags = QED_FILTER_RX_MODE_TYPE_REGULAR;
  
  	/* Configure all filters regardless, in case promisc is rejected */
  	if (uc_count < edev->dev_info.num_mac_filters) {
  		int i;
  
  		temp = uc_macs;
  		for (i = 0; i < uc_count; i++) {
  			rc = qede_set_ucast_rx_mac(edev,
  						   QED_FILTER_XCAST_TYPE_ADD,
  						   temp);
  			if (rc)
  				goto out;
  
  			temp += ETH_ALEN;
  		}
  	} else {
  		accept_flags = QED_FILTER_RX_MODE_TYPE_PROMISC;
  	}
  
  	rc = qede_configure_mcast_filtering(ndev, &accept_flags);
  	if (rc)
  		goto out;
  
  	/* take care of VLAN mode */
  	if (ndev->flags & IFF_PROMISC) {
  		qede_config_accept_any_vlan(edev, true);
  	} else if (!edev->non_configured_vlans) {
  		/* It's possible that accept_any_vlan mode is set due to a
  		 * previous setting of IFF_PROMISC. If vlan credits are
  		 * sufficient, disable accept_any_vlan.
  		 */
  		qede_config_accept_any_vlan(edev, false);
  	}
  
  	rx_mode.filter.accept_flags = accept_flags;
  	edev->ops->filter_config(edev->cdev, &rx_mode);
  out:
  	kfree(uc_macs);
  }
  
  static struct qede_arfs_fltr_node *
  qede_get_arfs_fltr_by_loc(struct hlist_head *head, u64 location)
  {
  	struct qede_arfs_fltr_node *fltr;
  
  	hlist_for_each_entry(fltr, head, node)
  		if (location == fltr->sw_id)
  			return fltr;
  
  	return NULL;
  }
  
  int qede_get_cls_rule_all(struct qede_dev *edev, struct ethtool_rxnfc *info,
  			  u32 *rule_locs)
  {
  	struct qede_arfs_fltr_node *fltr;
  	struct hlist_head *head;
  	int cnt = 0, rc = 0;
  
  	info->data = QEDE_RFS_MAX_FLTR;
  
  	__qede_lock(edev);
  
  	if (!edev->arfs) {
  		rc = -EPERM;
  		goto unlock;
  	}
  
  	head = QEDE_ARFS_BUCKET_HEAD(edev, 0);
  
  	hlist_for_each_entry(fltr, head, node) {
  		if (cnt == info->rule_cnt) {
  			rc = -EMSGSIZE;
  			goto unlock;
  		}
  
  		rule_locs[cnt] = fltr->sw_id;
  		cnt++;
  	}
  
  	info->rule_cnt = cnt;
  
  unlock:
  	__qede_unlock(edev);
  	return rc;
  }
  
  int qede_get_cls_rule_entry(struct qede_dev *edev, struct ethtool_rxnfc *cmd)
  {
  	struct ethtool_rx_flow_spec *fsp = &cmd->fs;
  	struct qede_arfs_fltr_node *fltr = NULL;
  	int rc = 0;
  
  	cmd->data = QEDE_RFS_MAX_FLTR;
  
  	__qede_lock(edev);
  
  	if (!edev->arfs) {
  		rc = -EPERM;
  		goto unlock;
  	}
  
  	fltr = qede_get_arfs_fltr_by_loc(QEDE_ARFS_BUCKET_HEAD(edev, 0),
  					 fsp->location);
  	if (!fltr) {
  		DP_NOTICE(edev, "Rule not found - location=0x%x\n",
  			  fsp->location);
  		rc = -EINVAL;
  		goto unlock;
  	}
  
  	if (fltr->tuple.eth_proto == htons(ETH_P_IP)) {
  		if (fltr->tuple.ip_proto == IPPROTO_TCP)
  			fsp->flow_type = TCP_V4_FLOW;
  		else
  			fsp->flow_type = UDP_V4_FLOW;
  
  		fsp->h_u.tcp_ip4_spec.psrc = fltr->tuple.src_port;
  		fsp->h_u.tcp_ip4_spec.pdst = fltr->tuple.dst_port;
  		fsp->h_u.tcp_ip4_spec.ip4src = fltr->tuple.src_ipv4;
  		fsp->h_u.tcp_ip4_spec.ip4dst = fltr->tuple.dst_ipv4;
  	} else {
  		if (fltr->tuple.ip_proto == IPPROTO_TCP)
  			fsp->flow_type = TCP_V6_FLOW;
  		else
  			fsp->flow_type = UDP_V6_FLOW;
  		fsp->h_u.tcp_ip6_spec.psrc = fltr->tuple.src_port;
  		fsp->h_u.tcp_ip6_spec.pdst = fltr->tuple.dst_port;
  		memcpy(&fsp->h_u.tcp_ip6_spec.ip6src,
  		       &fltr->tuple.src_ipv6, sizeof(struct in6_addr));
  		memcpy(&fsp->h_u.tcp_ip6_spec.ip6dst,
  		       &fltr->tuple.dst_ipv6, sizeof(struct in6_addr));
  	}
  
  	fsp->ring_cookie = fltr->rxq_id;
  
  	if (fltr->vfid) {
  		fsp->ring_cookie |= ((u64)fltr->vfid) <<
  					ETHTOOL_RX_FLOW_SPEC_RING_VF_OFF;
  	}
  
  	if (fltr->b_is_drop)
  		fsp->ring_cookie = RX_CLS_FLOW_DISC;
  unlock:
  	__qede_unlock(edev);
  	return rc;
  }
  
  static int
  qede_poll_arfs_filter_config(struct qede_dev *edev,
  			     struct qede_arfs_fltr_node *fltr)
  {
  	int count = QEDE_ARFS_POLL_COUNT;
  
  	while (fltr->used && count) {
  		msleep(20);
  		count--;
  	}
  
  	if (count == 0 || fltr->fw_rc) {
  		DP_NOTICE(edev, "Timeout in polling filter config\n");
  		qede_dequeue_fltr_and_config_searcher(edev, fltr);
  		return -EIO;
  	}
  
  	return fltr->fw_rc;
  }
  
  static int qede_flow_get_min_header_size(struct qede_arfs_tuple *t)
  {
  	int size = ETH_HLEN;
  
  	if (t->eth_proto == htons(ETH_P_IP))
  		size += sizeof(struct iphdr);
  	else
  		size += sizeof(struct ipv6hdr);
  
  	if (t->ip_proto == IPPROTO_TCP)
  		size += sizeof(struct tcphdr);
  	else
  		size += sizeof(struct udphdr);
  
  	return size;
  }
  
  static bool qede_flow_spec_ipv4_cmp(struct qede_arfs_tuple *a,
  				    struct qede_arfs_tuple *b)
  {
  	if (a->eth_proto != htons(ETH_P_IP) ||
  	    b->eth_proto != htons(ETH_P_IP))
  		return false;
  
  	return (a->src_ipv4 == b->src_ipv4) &&
  	       (a->dst_ipv4 == b->dst_ipv4);
  }
  
  static void qede_flow_build_ipv4_hdr(struct qede_arfs_tuple *t,
  				     void *header)
  {
  	__be16 *ports = (__be16 *)(header + ETH_HLEN + sizeof(struct iphdr));
  	struct iphdr *ip = (struct iphdr *)(header + ETH_HLEN);
  	struct ethhdr *eth = (struct ethhdr *)header;
  
  	eth->h_proto = t->eth_proto;
  	ip->saddr = t->src_ipv4;
  	ip->daddr = t->dst_ipv4;
  	ip->version = 0x4;
  	ip->ihl = 0x5;
  	ip->protocol = t->ip_proto;
  	ip->tot_len = cpu_to_be16(qede_flow_get_min_header_size(t) - ETH_HLEN);
  
  	/* ports is weakly typed to suit both TCP and UDP ports */
  	ports[0] = t->src_port;
  	ports[1] = t->dst_port;
  }
  
  static void qede_flow_stringify_ipv4_hdr(struct qede_arfs_tuple *t,
  					 void *buffer)
  {
  	const char *prefix = t->ip_proto == IPPROTO_TCP ? "TCP" : "UDP";
  
  	snprintf(buffer, QEDE_FILTER_PRINT_MAX_LEN,
  		 "%s %pI4 (%04x) -> %pI4 (%04x)",
  		 prefix, &t->src_ipv4, t->src_port,
  		 &t->dst_ipv4, t->dst_port);
  }
  
  static bool qede_flow_spec_ipv6_cmp(struct qede_arfs_tuple *a,
  				    struct qede_arfs_tuple *b)
  {
  	if (a->eth_proto != htons(ETH_P_IPV6) ||
  	    b->eth_proto != htons(ETH_P_IPV6))
  		return false;
  
  	if (memcmp(&a->src_ipv6, &b->src_ipv6, sizeof(struct in6_addr)))
  		return false;
  
  	if (memcmp(&a->dst_ipv6, &b->dst_ipv6, sizeof(struct in6_addr)))
  		return false;
  
  	return true;
  }
  
  static void qede_flow_build_ipv6_hdr(struct qede_arfs_tuple *t,
  				     void *header)
  {
  	__be16 *ports = (__be16 *)(header + ETH_HLEN + sizeof(struct ipv6hdr));
  	struct ipv6hdr *ip6 = (struct ipv6hdr *)(header + ETH_HLEN);
  	struct ethhdr *eth = (struct ethhdr *)header;
  
  	eth->h_proto = t->eth_proto;
  	memcpy(&ip6->saddr, &t->src_ipv6, sizeof(struct in6_addr));
  	memcpy(&ip6->daddr, &t->dst_ipv6, sizeof(struct in6_addr));
  	ip6->version = 0x6;
  
  	if (t->ip_proto == IPPROTO_TCP) {
  		ip6->nexthdr = NEXTHDR_TCP;
  		ip6->payload_len = cpu_to_be16(sizeof(struct tcphdr));
  	} else {
  		ip6->nexthdr = NEXTHDR_UDP;
  		ip6->payload_len = cpu_to_be16(sizeof(struct udphdr));
  	}
  
  	/* ports is weakly typed to suit both TCP and UDP ports */
  	ports[0] = t->src_port;
  	ports[1] = t->dst_port;
  }
  
  /* Validate fields which are set and not accepted by the driver */
  static int qede_flow_spec_validate_unused(struct qede_dev *edev,
  					  struct ethtool_rx_flow_spec *fs)
  {
  	if (fs->flow_type & FLOW_MAC_EXT) {
  		DP_INFO(edev, "Don't support MAC extensions\n");
  		return -EOPNOTSUPP;
  	}
  
  	if ((fs->flow_type & FLOW_EXT) &&
  	    (fs->h_ext.vlan_etype || fs->h_ext.vlan_tci)) {
  		DP_INFO(edev, "Don't support vlan-based classification\n");
  		return -EOPNOTSUPP;
  	}
  
  	if ((fs->flow_type & FLOW_EXT) &&
  	    (fs->h_ext.data[0] || fs->h_ext.data[1])) {
  		DP_INFO(edev, "Don't support user defined data\n");
  		return -EOPNOTSUPP;
  	}
  
  	return 0;
  }
  
  static int qede_set_v4_tuple_to_profile(struct qede_dev *edev,
  					struct qede_arfs_tuple *t)
  {
  	/* We must have Only 4-tuples/l4 port/src ip/dst ip
  	 * as an input.
  	 */
  	if (t->src_port && t->dst_port && t->src_ipv4 && t->dst_ipv4) {
  		t->mode = QED_FILTER_CONFIG_MODE_5_TUPLE;
  	} else if (!t->src_port && t->dst_port &&
  		   !t->src_ipv4 && !t->dst_ipv4) {
  		t->mode = QED_FILTER_CONFIG_MODE_L4_PORT;
  	} else if (!t->src_port && !t->dst_port &&
  		   !t->dst_ipv4 && t->src_ipv4) {
  		t->mode = QED_FILTER_CONFIG_MODE_IP_SRC;
  	} else if (!t->src_port && !t->dst_port &&
  		   t->dst_ipv4 && !t->src_ipv4) {
  		t->mode = QED_FILTER_CONFIG_MODE_IP_DEST;
  	} else {
  		DP_INFO(edev, "Invalid N-tuple\n");
  		return -EOPNOTSUPP;
  	}
  
  	t->ip_comp = qede_flow_spec_ipv4_cmp;
  	t->build_hdr = qede_flow_build_ipv4_hdr;
  	t->stringify = qede_flow_stringify_ipv4_hdr;
  
  	return 0;
  }
  
  static int qede_set_v6_tuple_to_profile(struct qede_dev *edev,
  					struct qede_arfs_tuple *t,
  					struct in6_addr *zaddr)
  {
  	/* We must have Only 4-tuples/l4 port/src ip/dst ip
  	 * as an input.
  	 */
  	if (t->src_port && t->dst_port &&
  	    memcmp(&t->src_ipv6, zaddr, sizeof(struct in6_addr)) &&
  	    memcmp(&t->dst_ipv6, zaddr, sizeof(struct in6_addr))) {
  		t->mode = QED_FILTER_CONFIG_MODE_5_TUPLE;
  	} else if (!t->src_port && t->dst_port &&
  		   !memcmp(&t->src_ipv6, zaddr, sizeof(struct in6_addr)) &&
  		   !memcmp(&t->dst_ipv6, zaddr, sizeof(struct in6_addr))) {
  		t->mode = QED_FILTER_CONFIG_MODE_L4_PORT;
  	} else if (!t->src_port && !t->dst_port &&
  		   !memcmp(&t->dst_ipv6, zaddr, sizeof(struct in6_addr)) &&
  		   memcmp(&t->src_ipv6, zaddr, sizeof(struct in6_addr))) {
  		t->mode = QED_FILTER_CONFIG_MODE_IP_SRC;
  	} else if (!t->src_port && !t->dst_port &&
  		   memcmp(&t->dst_ipv6, zaddr, sizeof(struct in6_addr)) &&
  		   !memcmp(&t->src_ipv6, zaddr, sizeof(struct in6_addr))) {
  		t->mode = QED_FILTER_CONFIG_MODE_IP_DEST;
  	} else {
  		DP_INFO(edev, "Invalid N-tuple\n");
  		return -EOPNOTSUPP;
  	}
  
  	t->ip_comp = qede_flow_spec_ipv6_cmp;
  	t->build_hdr = qede_flow_build_ipv6_hdr;
  
  	return 0;
  }
  
  /* Must be called while qede lock is held */
  static struct qede_arfs_fltr_node *
  qede_flow_find_fltr(struct qede_dev *edev, struct qede_arfs_tuple *t)
  {
  	struct qede_arfs_fltr_node *fltr;
  	struct hlist_node *temp;
  	struct hlist_head *head;
  
  	head = QEDE_ARFS_BUCKET_HEAD(edev, 0);
  
  	hlist_for_each_entry_safe(fltr, temp, head, node) {
  		if (fltr->tuple.ip_proto == t->ip_proto &&
  		    fltr->tuple.src_port == t->src_port &&
  		    fltr->tuple.dst_port == t->dst_port &&
  		    t->ip_comp(&fltr->tuple, t))
  			return fltr;
  	}
  
  	return NULL;
  }
  
  static void qede_flow_set_destination(struct qede_dev *edev,
  				      struct qede_arfs_fltr_node *n,
  				      struct ethtool_rx_flow_spec *fs)
  {
  	if (fs->ring_cookie == RX_CLS_FLOW_DISC) {
  		n->b_is_drop = true;
  		return;
  	}
  
  	n->vfid = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
  	n->rxq_id = ethtool_get_flow_spec_ring(fs->ring_cookie);
  	n->next_rxq_id = n->rxq_id;
  
  	if (n->vfid)
  		DP_VERBOSE(edev, QED_MSG_SP,
  			   "Configuring N-tuple for VF 0x%02x\n", n->vfid - 1);
  }
  
  int qede_delete_flow_filter(struct qede_dev *edev, u64 cookie)
  {
  	struct qede_arfs_fltr_node *fltr = NULL;
  	int rc = -EPERM;
  
  	__qede_lock(edev);
  	if (!edev->arfs)
  		goto unlock;
  
  	fltr = qede_get_arfs_fltr_by_loc(QEDE_ARFS_BUCKET_HEAD(edev, 0),
  					 cookie);
  	if (!fltr)
  		goto unlock;
  
  	qede_configure_arfs_fltr(edev, fltr, fltr->rxq_id, false);
  
  	rc = qede_poll_arfs_filter_config(edev, fltr);
  	if (rc == 0)
  		qede_dequeue_fltr_and_config_searcher(edev, fltr);
  
  unlock:
  	__qede_unlock(edev);
  	return rc;
  }
  
  int qede_get_arfs_filter_count(struct qede_dev *edev)
  {
  	int count = 0;
  
  	__qede_lock(edev);
  
  	if (!edev->arfs)
  		goto unlock;
  
  	count = edev->arfs->filter_count;
  
  unlock:
  	__qede_unlock(edev);
  	return count;
  }
  
  static int qede_parse_actions(struct qede_dev *edev,
  			      struct flow_action *flow_action)
  {
  	const struct flow_action_entry *act;
  	int i;
  
  	if (!flow_action_has_entries(flow_action)) {
  		DP_NOTICE(edev, "No actions received\n");
  		return -EINVAL;
  	}
  
  	flow_action_for_each(i, act, flow_action) {
  		switch (act->id) {
  		case FLOW_ACTION_DROP:
  			break;
  		case FLOW_ACTION_QUEUE:
  			if (act->queue.vf)
  				break;
  
  			if (act->queue.index >= QEDE_RSS_COUNT(edev)) {
  				DP_INFO(edev, "Queue out-of-bounds\n");
  				return -EINVAL;
  			}
  			break;
  		default:
  			return -EINVAL;
  		}
  	}
  
  	return 0;
  }
  
  static int
  qede_flow_parse_ports(struct qede_dev *edev, struct flow_rule *rule,
  		      struct qede_arfs_tuple *t)
  {
  	if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS)) {
  		struct flow_match_ports match;
  
  		flow_rule_match_ports(rule, &match);
  		if ((match.key->src && match.mask->src != U16_MAX) ||
  		    (match.key->dst && match.mask->dst != U16_MAX)) {
  			DP_NOTICE(edev, "Do not support ports masks\n");
  			return -EINVAL;
  		}
  
  		t->src_port = match.key->src;
  		t->dst_port = match.key->dst;
  	}
  
  	return 0;
  }
  
  static int
  qede_flow_parse_v6_common(struct qede_dev *edev, struct flow_rule *rule,
  			  struct qede_arfs_tuple *t)
  {
  	struct in6_addr zero_addr, addr;
  
  	memset(&zero_addr, 0, sizeof(addr));
  	memset(&addr, 0xff, sizeof(addr));
  
  	if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPV6_ADDRS)) {
  		struct flow_match_ipv6_addrs match;
  
  		flow_rule_match_ipv6_addrs(rule, &match);
  		if ((memcmp(&match.key->src, &zero_addr, sizeof(addr)) &&
  		     memcmp(&match.mask->src, &addr, sizeof(addr))) ||
  		    (memcmp(&match.key->dst, &zero_addr, sizeof(addr)) &&
  		     memcmp(&match.mask->dst, &addr, sizeof(addr)))) {
  			DP_NOTICE(edev,
  				  "Do not support IPv6 address prefix/mask\n");
  			return -EINVAL;
  		}
  
  		memcpy(&t->src_ipv6, &match.key->src, sizeof(addr));
  		memcpy(&t->dst_ipv6, &match.key->dst, sizeof(addr));
  	}
  
  	if (qede_flow_parse_ports(edev, rule, t))
  		return -EINVAL;
  
  	return qede_set_v6_tuple_to_profile(edev, t, &zero_addr);
  }
  
  static int
  qede_flow_parse_v4_common(struct qede_dev *edev, struct flow_rule *rule,
  			struct qede_arfs_tuple *t)
  {
  	if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPV4_ADDRS)) {
  		struct flow_match_ipv4_addrs match;
  
  		flow_rule_match_ipv4_addrs(rule, &match);
  		if ((match.key->src && match.mask->src != U32_MAX) ||
  		    (match.key->dst && match.mask->dst != U32_MAX)) {
  			DP_NOTICE(edev, "Do not support ipv4 prefix/masks\n");
  			return -EINVAL;
  		}
  
  		t->src_ipv4 = match.key->src;
  		t->dst_ipv4 = match.key->dst;
  	}
  
  	if (qede_flow_parse_ports(edev, rule, t))
  		return -EINVAL;
  
  	return qede_set_v4_tuple_to_profile(edev, t);
  }
  
  static int
  qede_flow_parse_tcp_v6(struct qede_dev *edev, struct flow_rule *rule,
  		     struct qede_arfs_tuple *tuple)
  {
  	tuple->ip_proto = IPPROTO_TCP;
  	tuple->eth_proto = htons(ETH_P_IPV6);
  
  	return qede_flow_parse_v6_common(edev, rule, tuple);
  }
  
  static int
  qede_flow_parse_tcp_v4(struct qede_dev *edev, struct flow_rule *rule,
  		     struct qede_arfs_tuple *tuple)
  {
  	tuple->ip_proto = IPPROTO_TCP;
  	tuple->eth_proto = htons(ETH_P_IP);
  
  	return qede_flow_parse_v4_common(edev, rule, tuple);
  }
  
  static int
  qede_flow_parse_udp_v6(struct qede_dev *edev, struct flow_rule *rule,
  		     struct qede_arfs_tuple *tuple)
  {
  	tuple->ip_proto = IPPROTO_UDP;
  	tuple->eth_proto = htons(ETH_P_IPV6);
  
  	return qede_flow_parse_v6_common(edev, rule, tuple);
  }
  
  static int
  qede_flow_parse_udp_v4(struct qede_dev *edev, struct flow_rule *rule,
  		     struct qede_arfs_tuple *tuple)
  {
  	tuple->ip_proto = IPPROTO_UDP;
  	tuple->eth_proto = htons(ETH_P_IP);
  
  	return qede_flow_parse_v4_common(edev, rule, tuple);
  }
  
  static int
  qede_parse_flow_attr(struct qede_dev *edev, __be16 proto,
  		     struct flow_rule *rule, struct qede_arfs_tuple *tuple)
  {
  	struct flow_dissector *dissector = rule->match.dissector;
  	int rc = -EINVAL;
  	u8 ip_proto = 0;
  
  	memset(tuple, 0, sizeof(*tuple));
  
  	if (dissector->used_keys &
  	    ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
  	      BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
  	      BIT(FLOW_DISSECTOR_KEY_BASIC) |
  	      BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
  	      BIT(FLOW_DISSECTOR_KEY_PORTS))) {
  		DP_NOTICE(edev, "Unsupported key set:0x%x\n",
  			  dissector->used_keys);
  		return -EOPNOTSUPP;
  	}
  
  	if (proto != htons(ETH_P_IP) &&
  	    proto != htons(ETH_P_IPV6)) {
  		DP_NOTICE(edev, "Unsupported proto=0x%x\n", proto);
  		return -EPROTONOSUPPORT;
  	}
  
  	if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) {
  		struct flow_match_basic match;
  
  		flow_rule_match_basic(rule, &match);
  		ip_proto = match.key->ip_proto;
  	}
  
  	if (ip_proto == IPPROTO_TCP && proto == htons(ETH_P_IP))
  		rc = qede_flow_parse_tcp_v4(edev, rule, tuple);
  	else if (ip_proto == IPPROTO_TCP && proto == htons(ETH_P_IPV6))
  		rc = qede_flow_parse_tcp_v6(edev, rule, tuple);
  	else if (ip_proto == IPPROTO_UDP && proto == htons(ETH_P_IP))
  		rc = qede_flow_parse_udp_v4(edev, rule, tuple);
  	else if (ip_proto == IPPROTO_UDP && proto == htons(ETH_P_IPV6))
  		rc = qede_flow_parse_udp_v6(edev, rule, tuple);
  	else
  		DP_NOTICE(edev, "Invalid protocol request\n");
  
  	return rc;
  }
  
  int qede_add_tc_flower_fltr(struct qede_dev *edev, __be16 proto,
  			    struct flow_cls_offload *f)
  {
  	struct qede_arfs_fltr_node *n;
  	int min_hlen, rc = -EINVAL;
  	struct qede_arfs_tuple t;
  
  	__qede_lock(edev);
  
  	if (!edev->arfs) {
  		rc = -EPERM;
  		goto unlock;
  	}
  
  	/* parse flower attribute and prepare filter */
  	if (qede_parse_flow_attr(edev, proto, f->rule, &t))
  		goto unlock;
  
  	/* Validate profile mode and number of filters */
  	if ((edev->arfs->filter_count && edev->arfs->mode != t.mode) ||
  	    edev->arfs->filter_count == QEDE_RFS_MAX_FLTR) {
  		DP_NOTICE(edev,
  			  "Filter configuration invalidated, filter mode=0x%x, configured mode=0x%x, filter count=0x%x\n",
  			  t.mode, edev->arfs->mode, edev->arfs->filter_count);
  		goto unlock;
  	}
  
  	/* parse tc actions and get the vf_id */
  	if (qede_parse_actions(edev, &f->rule->action))
  		goto unlock;
  
  	if (qede_flow_find_fltr(edev, &t)) {
  		rc = -EEXIST;
  		goto unlock;
  	}
  
  	n = kzalloc(sizeof(*n), GFP_KERNEL);
  	if (!n) {
  		rc = -ENOMEM;
  		goto unlock;
  	}
  
  	min_hlen = qede_flow_get_min_header_size(&t);
  
  	n->data = kzalloc(min_hlen, GFP_KERNEL);
  	if (!n->data) {
  		kfree(n);
  		rc = -ENOMEM;
  		goto unlock;
  	}
  
  	memcpy(&n->tuple, &t, sizeof(n->tuple));
  
  	n->buf_len = min_hlen;
  	n->b_is_drop = true;
  	n->sw_id = f->cookie;
  
  	n->tuple.build_hdr(&n->tuple, n->data);
  
  	rc = qede_enqueue_fltr_and_config_searcher(edev, n, 0);
  	if (rc)
  		goto unlock;
  
  	qede_configure_arfs_fltr(edev, n, n->rxq_id, true);
  	rc = qede_poll_arfs_filter_config(edev, n);
  
  unlock:
  	__qede_unlock(edev);
  	return rc;
  }
  
  static int qede_flow_spec_validate(struct qede_dev *edev,
  				   struct flow_action *flow_action,
  				   struct qede_arfs_tuple *t,
  				   __u32 location)
  {
  	if (location >= QEDE_RFS_MAX_FLTR) {
  		DP_INFO(edev, "Location out-of-bounds\n");
  		return -EINVAL;
  	}
  
  	/* Check location isn't already in use */
  	if (test_bit(location, edev->arfs->arfs_fltr_bmap)) {
  		DP_INFO(edev, "Location already in use\n");
  		return -EINVAL;
  	}
  
  	/* Check if the filtering-mode could support the filter */
  	if (edev->arfs->filter_count &&
  	    edev->arfs->mode != t->mode) {
  		DP_INFO(edev,
  			"flow_spec would require filtering mode %08x, but %08x is configured\n",
  			t->mode, edev->arfs->filter_count);
  		return -EINVAL;
  	}
  
  	if (qede_parse_actions(edev, flow_action))
  		return -EINVAL;
  
  	return 0;
  }
  
  static int qede_flow_spec_to_rule(struct qede_dev *edev,
  				  struct qede_arfs_tuple *t,
  				  struct ethtool_rx_flow_spec *fs)
  {
  	struct ethtool_rx_flow_spec_input input = {};
  	struct ethtool_rx_flow_rule *flow;
  	__be16 proto;
  	int err = 0;
  
  	if (qede_flow_spec_validate_unused(edev, fs))
  		return -EOPNOTSUPP;
  
  	switch ((fs->flow_type & ~FLOW_EXT)) {
  	case TCP_V4_FLOW:
  	case UDP_V4_FLOW:
  		proto = htons(ETH_P_IP);
  		break;
  	case TCP_V6_FLOW:
  	case UDP_V6_FLOW:
  		proto = htons(ETH_P_IPV6);
  		break;
  	default:
  		DP_VERBOSE(edev, NETIF_MSG_IFUP,
  			   "Can't support flow of type %08x\n", fs->flow_type);
  		return -EOPNOTSUPP;
  	}
  
  	input.fs = fs;
  	flow = ethtool_rx_flow_rule_create(&input);
  	if (IS_ERR(flow))
  		return PTR_ERR(flow);
  
  	if (qede_parse_flow_attr(edev, proto, flow->rule, t)) {
  		err = -EINVAL;
  		goto err_out;
  	}
  
  	/* Make sure location is valid and filter isn't already set */
  	err = qede_flow_spec_validate(edev, &flow->rule->action, t,
  				      fs->location);
  err_out:
  	ethtool_rx_flow_rule_destroy(flow);
  	return err;
  
  }
  
  int qede_add_cls_rule(struct qede_dev *edev, struct ethtool_rxnfc *info)
  {
  	struct ethtool_rx_flow_spec *fsp = &info->fs;
  	struct qede_arfs_fltr_node *n;
  	struct qede_arfs_tuple t;
  	int min_hlen, rc;
  
  	__qede_lock(edev);
  
  	if (!edev->arfs) {
  		rc = -EPERM;
  		goto unlock;
  	}
  
  	/* Translate the flow specification into something fittign our DB */
  	rc = qede_flow_spec_to_rule(edev, &t, fsp);
  	if (rc)
  		goto unlock;
  
  	if (qede_flow_find_fltr(edev, &t)) {
  		rc = -EINVAL;
  		goto unlock;
  	}
  
  	n = kzalloc(sizeof(*n), GFP_KERNEL);
  	if (!n) {
  		rc = -ENOMEM;
  		goto unlock;
  	}
  
  	min_hlen = qede_flow_get_min_header_size(&t);
  	n->data = kzalloc(min_hlen, GFP_KERNEL);
  	if (!n->data) {
  		kfree(n);
  		rc = -ENOMEM;
  		goto unlock;
  	}
  
  	n->sw_id = fsp->location;
  	set_bit(n->sw_id, edev->arfs->arfs_fltr_bmap);
  	n->buf_len = min_hlen;
  
  	memcpy(&n->tuple, &t, sizeof(n->tuple));
  
  	qede_flow_set_destination(edev, n, fsp);
  
  	/* Build a minimal header according to the flow */
  	n->tuple.build_hdr(&n->tuple, n->data);
  
  	rc = qede_enqueue_fltr_and_config_searcher(edev, n, 0);
  	if (rc)
  		goto unlock;
  
  	qede_configure_arfs_fltr(edev, n, n->rxq_id, true);
  	rc = qede_poll_arfs_filter_config(edev, n);
  unlock:
  	__qede_unlock(edev);
  
  	return rc;
  }
  