// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2019 Synopsys, Inc. and/or its affiliates.
 * stmmac Selftests Support
 *
 * Author: Jose Abreu <joabreu@synopsys.com>
 */

#include <linux/bitrev.h>
#include <linux/completion.h>
#include <linux/crc32.h>
#include <linux/ethtool.h>
#include <linux/ip.h>
#include <linux/phy.h>
#include <linux/udp.h>
#include <net/pkt_cls.h>
#include <net/tcp.h>
#include <net/udp.h>
#include <net/tc_act/tc_gact.h>
#include "stmmac.h"

struct stmmachdr {
	__be32 version;
	__be64 magic;
	u8 id;
} __packed;

#define STMMAC_TEST_PKT_SIZE (sizeof(struct ethhdr) + sizeof(struct iphdr) + \
			      sizeof(struct stmmachdr))
#define STMMAC_TEST_PKT_MAGIC	0xdeadcafecafedeadULL
#define STMMAC_LB_TIMEOUT	msecs_to_jiffies(200)

struct stmmac_packet_attrs {
	int vlan;
	int vlan_id_in;
	int vlan_id_out;
	unsigned char *src;
	unsigned char *dst;
	u32 ip_src;
	u32 ip_dst;
	int tcp;
	int sport;
	int dport;
	u32 exp_hash;
	int dont_wait;
	int timeout;
	int size;
	int max_size;
	int remove_sa;
	u8 id;
	int sarc;
	u16 queue_mapping;
};

static u8 stmmac_test_next_id;

static struct sk_buff *stmmac_test_get_udp_skb(struct stmmac_priv *priv,
					       struct stmmac_packet_attrs *attr)
{
	struct sk_buff *skb = NULL;
	struct udphdr *uhdr = NULL;
	struct tcphdr *thdr = NULL;
	struct stmmachdr *shdr;
	struct ethhdr *ehdr;
	struct iphdr *ihdr;
	int iplen, size;

	size = attr->size + STMMAC_TEST_PKT_SIZE;
	if (attr->vlan) {
		size += 4;
		if (attr->vlan > 1)
			size += 4;
	}

	if (attr->tcp)
		size += sizeof(struct tcphdr);
	else
		size += sizeof(struct udphdr);

	if (attr->max_size && (attr->max_size > size))
		size = attr->max_size;

	skb = netdev_alloc_skb(priv->dev, size);
	if (!skb)
		return NULL;

	prefetchw(skb->data);

	if (attr->vlan > 1)
		ehdr = skb_push(skb, ETH_HLEN + 8);
	else if (attr->vlan)
		ehdr = skb_push(skb, ETH_HLEN + 4);
	else if (attr->remove_sa)
		ehdr = skb_push(skb, ETH_HLEN - 6);
	else
		ehdr = skb_push(skb, ETH_HLEN);
	skb_reset_mac_header(skb);

	skb_set_network_header(skb, skb->len);
	ihdr = skb_put(skb, sizeof(*ihdr));

	skb_set_transport_header(skb, skb->len);
	if (attr->tcp)
		thdr = skb_put(skb, sizeof(*thdr));
	else
		uhdr = skb_put(skb, sizeof(*uhdr));

	if (!attr->remove_sa)
		eth_zero_addr(ehdr->h_source);
	eth_zero_addr(ehdr->h_dest);
	if (attr->src && !attr->remove_sa)
		ether_addr_copy(ehdr->h_source, attr->src);
	if (attr->dst)
		ether_addr_copy(ehdr->h_dest, attr->dst);

	if (!attr->remove_sa) {
		ehdr->h_proto = htons(ETH_P_IP);
	} else {
		__be16 *ptr = (__be16 *)ehdr;

		/* HACK */
		ptr[3] = htons(ETH_P_IP);
	}

	if (attr->vlan) {
		__be16 *tag, *proto;

		if (!attr->remove_sa) {
			tag = (void *)ehdr + ETH_HLEN;
			proto = (void *)ehdr + (2 * ETH_ALEN);
		} else {
			tag = (void *)ehdr + ETH_HLEN - 6;
			proto = (void *)ehdr + ETH_ALEN;
		}

		proto[0] = htons(ETH_P_8021Q);
		tag[0] = htons(attr->vlan_id_out);
		tag[1] = htons(ETH_P_IP);
		if (attr->vlan > 1) {
			proto[0] = htons(ETH_P_8021AD);
			tag[1] = htons(ETH_P_8021Q);
			tag[2] = htons(attr->vlan_id_in);
			tag[3] = htons(ETH_P_IP);
		}
	}

	if (attr->tcp) {
		thdr->source = htons(attr->sport);
		thdr->dest = htons(attr->dport);
		thdr->doff = sizeof(struct tcphdr) / 4;
		thdr->check = 0;
	} else {
		uhdr->source = htons(attr->sport);
		uhdr->dest = htons(attr->dport);
		uhdr->len = htons(sizeof(*shdr) + sizeof(*uhdr) + attr->size);
		if (attr->max_size)
			uhdr->len = htons(attr->max_size -
					  (sizeof(*ihdr) + sizeof(*ehdr)));
		uhdr->check = 0;
	}

	ihdr->ihl = 5;
	ihdr->ttl = 32;
	ihdr->version = 4;
	if (attr->tcp)
		ihdr->protocol = IPPROTO_TCP;
	else
		ihdr->protocol = IPPROTO_UDP;
	iplen = sizeof(*ihdr) + sizeof(*shdr) + attr->size;
	if (attr->tcp)
		iplen += sizeof(*thdr);
	else
		iplen += sizeof(*uhdr);

	if (attr->max_size)
		iplen = attr->max_size - sizeof(*ehdr);

	ihdr->tot_len = htons(iplen);
	ihdr->frag_off = 0;
	ihdr->saddr = htonl(attr->ip_src);
	ihdr->daddr = htonl(attr->ip_dst);
	ihdr->tos = 0;
	ihdr->id = 0;
	ip_send_check(ihdr);

	shdr = skb_put(skb, sizeof(*shdr));
	shdr->version = 0;
	shdr->magic = cpu_to_be64(STMMAC_TEST_PKT_MAGIC);
	attr->id = stmmac_test_next_id;
	shdr->id = stmmac_test_next_id++;

	if (attr->size)
		skb_put(skb, attr->size);
	if (attr->max_size && (attr->max_size > skb->len))
		skb_put(skb, attr->max_size - skb->len);

	skb->csum = 0;
	skb->ip_summed = CHECKSUM_PARTIAL;
	if (attr->tcp) {
		thdr->check = ~tcp_v4_check(skb->len, ihdr->saddr, ihdr->daddr, 0);
		skb->csum_start = skb_transport_header(skb) - skb->head;
		skb->csum_offset = offsetof(struct tcphdr, check);
	} else {
		udp4_hwcsum(skb, ihdr->saddr, ihdr->daddr);
	}

	skb->protocol = htons(ETH_P_IP);
	skb->pkt_type = PACKET_HOST;
	skb->dev = priv->dev;

	return skb;
}

static struct sk_buff *stmmac_test_get_arp_skb(struct stmmac_priv *priv,
					       struct stmmac_packet_attrs *attr)
{
	__be32 ip_src = htonl(attr->ip_src);
	__be32 ip_dst = htonl(attr->ip_dst);
	struct sk_buff *skb = NULL;

	skb = arp_create(ARPOP_REQUEST, ETH_P_ARP, ip_dst, priv->dev, ip_src,
			 NULL, attr->src, attr->dst);
	if (!skb)
		return NULL;

	skb->pkt_type = PACKET_HOST;
	skb->dev = priv->dev;

	return skb;
}

struct stmmac_test_priv {
	struct stmmac_packet_attrs *packet;
	struct packet_type pt;
	struct completion comp;
	int double_vlan;
	int vlan_id;
	int ok;
};

static int stmmac_test_loopback_validate(struct sk_buff *skb,
					 struct net_device *ndev,
					 struct packet_type *pt,
					 struct net_device *orig_ndev)
{
	struct stmmac_test_priv *tpriv = pt->af_packet_priv;
	unsigned char *src = tpriv->packet->src;
	unsigned char *dst = tpriv->packet->dst;
	struct stmmachdr *shdr;
	struct ethhdr *ehdr;
	struct udphdr *uhdr;
	struct tcphdr *thdr;
	struct iphdr *ihdr;

	skb = skb_unshare(skb, GFP_ATOMIC);
	if (!skb)
		goto out;

	if (skb_linearize(skb))
		goto out;
	if (skb_headlen(skb) < (STMMAC_TEST_PKT_SIZE - ETH_HLEN))
		goto out;

	ehdr = (struct ethhdr *)skb_mac_header(skb);
	if (dst) {
		if (!ether_addr_equal_unaligned(ehdr->h_dest, dst))
			goto out;
	}
	if (tpriv->packet->sarc) {
		if (!ether_addr_equal_unaligned(ehdr->h_source, ehdr->h_dest))
			goto out;
	} else if (src) {
		if (!ether_addr_equal_unaligned(ehdr->h_source, src))
			goto out;
	}

	ihdr = ip_hdr(skb);
	if (tpriv->double_vlan)
		ihdr = (struct iphdr *)(skb_network_header(skb) + 4);

	if (tpriv->packet->tcp) {
		if (ihdr->protocol != IPPROTO_TCP)
			goto out;

		thdr = (struct tcphdr *)((u8 *)ihdr + 4 * ihdr->ihl);
		if (thdr->dest != htons(tpriv->packet->dport))
			goto out;

		shdr = (struct stmmachdr *)((u8 *)thdr + sizeof(*thdr));
	} else {
		if (ihdr->protocol != IPPROTO_UDP)
			goto out;

		uhdr = (struct udphdr *)((u8 *)ihdr + 4 * ihdr->ihl);
		if (uhdr->dest != htons(tpriv->packet->dport))
			goto out;

		shdr = (struct stmmachdr *)((u8 *)uhdr + sizeof(*uhdr));
	}

	if (shdr->magic != cpu_to_be64(STMMAC_TEST_PKT_MAGIC))
		goto out;
	if (tpriv->packet->exp_hash && !skb->hash)
		goto out;
	if (tpriv->packet->id != shdr->id)
		goto out;

	tpriv->ok = true;
	complete(&tpriv->comp);
out:
	kfree_skb(skb);
	return 0;
}

static int __stmmac_test_loopback(struct stmmac_priv *priv,
				  struct stmmac_packet_attrs *attr)
{
	struct stmmac_test_priv *tpriv;
	struct sk_buff *skb = NULL;
	int ret = 0;

	tpriv = kzalloc(sizeof(*tpriv), GFP_KERNEL);
	if (!tpriv)
		return -ENOMEM;

	tpriv->ok = false;
	init_completion(&tpriv->comp);

	tpriv->pt.type = htons(ETH_P_IP);
	tpriv->pt.func = stmmac_test_loopback_validate;
	tpriv->pt.dev = priv->dev;
	tpriv->pt.af_packet_priv = tpriv;
	tpriv->packet = attr;

	if (!attr->dont_wait)
		dev_add_pack(&tpriv->pt);

	skb = stmmac_test_get_udp_skb(priv, attr);
	if (!skb) {
		ret = -ENOMEM;
		goto cleanup;
	}

	skb_set_queue_mapping(skb, attr->queue_mapping);
	ret = dev_queue_xmit(skb);
	if (ret)
		goto cleanup;

	if (attr->dont_wait)
		goto cleanup;

	if (!attr->timeout)
		attr->timeout = STMMAC_LB_TIMEOUT;

	wait_for_completion_timeout(&tpriv->comp, attr->timeout);
	ret = tpriv->ok ? 0 : -ETIMEDOUT;

cleanup:
	if (!attr->dont_wait)
		dev_remove_pack(&tpriv->pt);
	kfree(tpriv);
	return ret;
}

static int stmmac_test_mac_loopback(struct stmmac_priv *priv)
{
	struct stmmac_packet_attrs attr = { };

	attr.dst = priv->dev->dev_addr;
	return __stmmac_test_loopback(priv, &attr);
}

static int stmmac_test_phy_loopback(struct stmmac_priv *priv)
{
	struct stmmac_packet_attrs attr = { };
	int ret;

	if (!priv->dev->phydev)
		return -EBUSY;

	ret = phy_loopback(priv->dev->phydev, true);
	if (ret)
		return ret;

	attr.dst = priv->dev->dev_addr;
	ret = __stmmac_test_loopback(priv, &attr);

	phy_loopback(priv->dev->phydev, false);
	return ret;
}

static int stmmac_test_mmc(struct stmmac_priv *priv)
{
	struct stmmac_counters initial, final;
	int ret;

	memset(&initial, 0, sizeof(initial));
	memset(&final, 0, sizeof(final));

	if (!priv->dma_cap.rmon)
		return -EOPNOTSUPP;

	/* Save previous results into internal struct */
	stmmac_mmc_read(priv, priv->mmcaddr, &priv->mmc);

	ret = stmmac_test_mac_loopback(priv);
	if (ret)
		return ret;

	/* These will be loopback results so no need to save them */
	stmmac_mmc_read(priv, priv->mmcaddr, &final);

	/*
	 * The number of MMC counters available depends on HW configuration
	 * so we just use this one to validate the feature. I hope there is
	 * not a version without this counter.
	 */
	if (final.mmc_tx_framecount_g <= initial.mmc_tx_framecount_g)
		return -EINVAL;

	return 0;
}

static int stmmac_test_eee(struct stmmac_priv *priv)
{
	struct stmmac_extra_stats *initial, *final;
	int retries = 10;
	int ret;

	if (!priv->dma_cap.eee || !priv->eee_active)
		return -EOPNOTSUPP;

	initial = kzalloc(sizeof(*initial), GFP_KERNEL);
	if (!initial)
		return -ENOMEM;

	final = kzalloc(sizeof(*final), GFP_KERNEL);
	if (!final) {
		ret = -ENOMEM;
		goto out_free_initial;
	}

	memcpy(initial, &priv->xstats, sizeof(*initial));

	ret = stmmac_test_mac_loopback(priv);
	if (ret)
		goto out_free_final;

	/* We have no traffic in the line so, sooner or later it will go LPI */
	while (--retries) {
		memcpy(final, &priv->xstats, sizeof(*final));

		if (final->irq_tx_path_in_lpi_mode_n >
		    initial->irq_tx_path_in_lpi_mode_n)
			break;
		msleep(100);
	}

	if (!retries) {
		ret = -ETIMEDOUT;
		goto out_free_final;
	}

	if (final->irq_tx_path_in_lpi_mode_n <=
	    initial->irq_tx_path_in_lpi_mode_n) {
		ret = -EINVAL;
		goto out_free_final;
	}

	if (final->irq_tx_path_exit_lpi_mode_n <=
	    initial->irq_tx_path_exit_lpi_mode_n) {
		ret = -EINVAL;
		goto out_free_final;
	}

out_free_final:
	kfree(final);
out_free_initial:
	kfree(initial);
	return ret;
}

static int stmmac_filter_check(struct stmmac_priv *priv)
{
	if (!(priv->dev->flags & IFF_PROMISC))
		return 0;

	netdev_warn(priv->dev, "Test can't be run in promiscuous mode!\n");
	return -EOPNOTSUPP;
}

static bool stmmac_hash_check(struct stmmac_priv *priv, unsigned char *addr)
{
	int mc_offset = 32 - priv->hw->mcast_bits_log2;
	struct netdev_hw_addr *ha;
	u32 hash, hash_nr;

	/* First compute the hash for desired addr */
	hash = bitrev32(~crc32_le(~0, addr, 6)) >> mc_offset;
	hash_nr = hash >> 5;
	hash = 1 << (hash & 0x1f);

	/* Now, check if it collides with any existing one */
	netdev_for_each_mc_addr(ha, priv->dev) {
		u32 nr = bitrev32(~crc32_le(~0, ha->addr, ETH_ALEN)) >> mc_offset;
		if (((nr >> 5) == hash_nr) && ((1 << (nr & 0x1f)) == hash))
			return false;
	}

	/* No collisions, address is good to go */
	return true;
}

static bool stmmac_perfect_check(struct stmmac_priv *priv, unsigned char *addr)
{
	struct netdev_hw_addr *ha;

	/* Check if it collides with any existing one */
	netdev_for_each_uc_addr(ha, priv->dev) {
		if (!memcmp(ha->addr, addr, ETH_ALEN))
			return false;
	}

	/* No collisions, address is good to go */
	return true;
}

static int stmmac_test_hfilt(struct stmmac_priv *priv)
{
	unsigned char gd_addr[ETH_ALEN] = {0xf1, 0xee, 0xdd, 0xcc, 0xbb, 0xaa};
	unsigned char bd_addr[ETH_ALEN] = {0xf1, 0xff, 0xff, 0xff, 0xff, 0xff};
	struct stmmac_packet_attrs attr = { };
	int ret, tries = 256;

	ret = stmmac_filter_check(priv);
	if (ret)
		return ret;

	if (netdev_mc_count(priv->dev) >= priv->hw->multicast_filter_bins)
		return -EOPNOTSUPP;

	while (--tries) {
		/* We only need to check the bd_addr for collisions */
		bd_addr[ETH_ALEN - 1] = tries;
		if (stmmac_hash_check(priv, bd_addr))
			break;
	}

	if (!tries)
		return -EOPNOTSUPP;

	ret = dev_mc_add(priv->dev, gd_addr);
	if (ret)
		return ret;

	attr.dst = gd_addr;

	/* Shall receive packet */
	ret = __stmmac_test_loopback(priv, &attr);
	if (ret)
		goto cleanup;

	attr.dst = bd_addr;

	/* Shall NOT receive packet */
	ret = __stmmac_test_loopback(priv, &attr);
	ret = ret ? 0 : -EINVAL;

cleanup:
	dev_mc_del(priv->dev, gd_addr);
	return ret;
}

static int stmmac_test_pfilt(struct stmmac_priv *priv)
{
	unsigned char gd_addr[ETH_ALEN] = {0xf0, 0x01, 0x44, 0x55, 0x66, 0x77};
	unsigned char bd_addr[ETH_ALEN] = {0xf0, 0xff, 0xff, 0xff, 0xff, 0xff};
	struct stmmac_packet_attrs attr = { };
	int ret, tries = 256;

	if (stmmac_filter_check(priv))
		return -EOPNOTSUPP;
	if (netdev_uc_count(priv->dev) >= priv->hw->unicast_filter_entries)
		return -EOPNOTSUPP;

	while (--tries) {
		/* We only need to check the bd_addr for collisions */
		bd_addr[ETH_ALEN - 1] = tries;
		if (stmmac_perfect_check(priv, bd_addr))
			break;
	}

	if (!tries)
		return -EOPNOTSUPP;

	ret = dev_uc_add(priv->dev, gd_addr);
	if (ret)
		return ret;

	attr.dst = gd_addr;

	/* Shall receive packet */
	ret = __stmmac_test_loopback(priv, &attr);
	if (ret)
		goto cleanup;

	attr.dst = bd_addr;

	/* Shall NOT receive packet */
	ret = __stmmac_test_loopback(priv, &attr);
	ret = ret ? 0 : -EINVAL;

cleanup:
	dev_uc_del(priv->dev, gd_addr);
	return ret;
}

static int stmmac_test_mcfilt(struct stmmac_priv *priv)
{
	unsigned char uc_addr[ETH_ALEN] = {0xf0, 0xff, 0xff, 0xff, 0xff, 0xff};
	unsigned char mc_addr[ETH_ALEN] = {0xf1, 0xff, 0xff, 0xff, 0xff, 0xff};
	struct stmmac_packet_attrs attr = { };
	int ret, tries = 256;

	if (stmmac_filter_check(priv))
		return -EOPNOTSUPP;
	if (netdev_uc_count(priv->dev) >= priv->hw->unicast_filter_entries)
		return -EOPNOTSUPP;
	if (netdev_mc_count(priv->dev) >= priv->hw->multicast_filter_bins)
		return -EOPNOTSUPP;

	while (--tries) {
		/* We only need to check the mc_addr for collisions */
		mc_addr[ETH_ALEN - 1] = tries;
		if (stmmac_hash_check(priv, mc_addr))
			break;
	}

	if (!tries)
		return -EOPNOTSUPP;

	ret = dev_uc_add(priv->dev, uc_addr);
	if (ret)
		return ret;

	attr.dst = uc_addr;

	/* Shall receive packet */
	ret = __stmmac_test_loopback(priv, &attr);
	if (ret)
		goto cleanup;

	attr.dst = mc_addr;

	/* Shall NOT receive packet */
	ret = __stmmac_test_loopback(priv, &attr);
	ret = ret ? 0 : -EINVAL;

cleanup:
	dev_uc_del(priv->dev, uc_addr);
	return ret;
}

static int stmmac_test_ucfilt(struct stmmac_priv *priv)
{
	unsigned char uc_addr[ETH_ALEN] = {0xf0, 0xff, 0xff, 0xff, 0xff, 0xff};
	unsigned char mc_addr[ETH_ALEN] = {0xf1, 0xff, 0xff, 0xff, 0xff, 0xff};
	struct stmmac_packet_attrs attr = { };
	int ret, tries = 256;

	if (stmmac_filter_check(priv))
		return -EOPNOTSUPP;
	if (netdev_uc_count(priv->dev) >= priv->hw->unicast_filter_entries)
		return -EOPNOTSUPP;
	if (netdev_mc_count(priv->dev) >= priv->hw->multicast_filter_bins)
		return -EOPNOTSUPP;

	while (--tries) {
		/* We only need to check the uc_addr for collisions */
		uc_addr[ETH_ALEN - 1] = tries;
		if (stmmac_perfect_check(priv, uc_addr))
			break;
	}

	if (!tries)
		return -EOPNOTSUPP;

	ret = dev_mc_add(priv->dev, mc_addr);
	if (ret)
		return ret;

	attr.dst = mc_addr;

	/* Shall receive packet */
	ret = __stmmac_test_loopback(priv, &attr);
	if (ret)
		goto cleanup;

	attr.dst = uc_addr;

	/* Shall NOT receive packet */
	ret = __stmmac_test_loopback(priv, &attr);
	ret = ret ? 0 : -EINVAL;

cleanup:
	dev_mc_del(priv->dev, mc_addr);
	return ret;
}

static int stmmac_test_flowctrl_validate(struct sk_buff *skb,
					 struct net_device *ndev,
					 struct packet_type *pt,
					 struct net_device *orig_ndev)
{
	struct stmmac_test_priv *tpriv = pt->af_packet_priv;
	struct ethhdr *ehdr;

	ehdr = (struct ethhdr *)skb_mac_header(skb);
	if (!ether_addr_equal_unaligned(ehdr->h_source, orig_ndev->dev_addr))
		goto out;
	if (ehdr->h_proto != htons(ETH_P_PAUSE))
		goto out;

	tpriv->ok = true;
	complete(&tpriv->comp);
out:
	kfree_skb(skb);
	return 0;
}

static int stmmac_test_flowctrl(struct stmmac_priv *priv)
{
	unsigned char paddr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00, 0x00, 0x01};
	struct phy_device *phydev = priv->dev->phydev;
	u32 rx_cnt = priv->plat->rx_queues_to_use;
	struct stmmac_test_priv *tpriv;
	unsigned int pkt_count;
	int i, ret = 0;

	if (!phydev || (!phydev->pause && !phydev->asym_pause))
		return -EOPNOTSUPP;

	tpriv = kzalloc(sizeof(*tpriv), GFP_KERNEL);
	if (!tpriv)
		return -ENOMEM;

	tpriv->ok = false;
	init_completion(&tpriv->comp);
	tpriv->pt.type = htons(ETH_P_PAUSE);
	tpriv->pt.func = stmmac_test_flowctrl_validate;
	tpriv->pt.dev = priv->dev;
	tpriv->pt.af_packet_priv = tpriv;
	dev_add_pack(&tpriv->pt);

	/* Compute minimum number of packets to make FIFO full */
	pkt_count = priv->plat->rx_fifo_size;
	if (!pkt_count)
		pkt_count = priv->dma_cap.rx_fifo_size;
	pkt_count /= 1400;
	pkt_count *= 2;

	for (i = 0; i < rx_cnt; i++)
		stmmac_stop_rx(priv, priv->ioaddr, i);

	ret = dev_set_promiscuity(priv->dev, 1);
	if (ret)
		goto cleanup;

	ret = dev_mc_add(priv->dev, paddr);
	if (ret)
		goto cleanup;

	for (i = 0; i < pkt_count; i++) {
		struct stmmac_packet_attrs attr = { };

		attr.dst = priv->dev->dev_addr;
		attr.dont_wait = true;
		attr.size = 1400;

		ret = __stmmac_test_loopback(priv, &attr);
		if (ret)
			goto cleanup;
		if (tpriv->ok)
			break;
	}

	/* Wait for some time in case RX Watchdog is enabled */
	msleep(200);

	for (i = 0; i < rx_cnt; i++) {
		struct stmmac_channel *ch = &priv->channel[i];
		u32 tail;

		tail = priv->rx_queue[i].dma_rx_phy +
			(DMA_RX_SIZE * sizeof(struct dma_desc));

		stmmac_set_rx_tail_ptr(priv, priv->ioaddr, tail, i);
		stmmac_start_rx(priv, priv->ioaddr, i);

		local_bh_disable();
		napi_reschedule(&ch->rx_napi);
		local_bh_enable();
	}

	wait_for_completion_timeout(&tpriv->comp, STMMAC_LB_TIMEOUT);
	ret = tpriv->ok ? 0 : -ETIMEDOUT;

cleanup:
	dev_mc_del(priv->dev, paddr);
	dev_set_promiscuity(priv->dev, -1);
	dev_remove_pack(&tpriv->pt);
	kfree(tpriv);
	return ret;
}

static int stmmac_test_rss(struct stmmac_priv *priv)
{
	struct stmmac_packet_attrs attr = { };

	if (!priv->dma_cap.rssen || !priv->rss.enable)
		return -EOPNOTSUPP;

	attr.dst = priv->dev->dev_addr;
	attr.exp_hash = true;
	attr.sport = 0x321;
	attr.dport = 0x123;

	return __stmmac_test_loopback(priv, &attr);
}

static int stmmac_test_vlan_validate(struct sk_buff *skb,
				     struct net_device *ndev,
				     struct packet_type *pt,
				     struct net_device *orig_ndev)
{
	struct stmmac_test_priv *tpriv = pt->af_packet_priv;
	struct stmmachdr *shdr;
	struct ethhdr *ehdr;
	struct udphdr *uhdr;
	struct iphdr *ihdr;
	u16 proto;

	proto = tpriv->double_vlan ? ETH_P_8021AD : ETH_P_8021Q;

	skb = skb_unshare(skb, GFP_ATOMIC);
	if (!skb)
		goto out;

	if (skb_linearize(skb))
		goto out;
	if (skb_headlen(skb) < (STMMAC_TEST_PKT_SIZE - ETH_HLEN))
		goto out;
	if (tpriv->vlan_id) {
		if (skb->vlan_proto != htons(proto))
			goto out;
		if (skb->vlan_tci != tpriv->vlan_id) {
			/* Means filter did not work. */
			tpriv->ok = false;
			complete(&tpriv->comp);
			goto out;
		}
	}

	ehdr = (struct ethhdr *)skb_mac_header(skb);
	if (!ether_addr_equal_unaligned(ehdr->h_dest, tpriv->packet->dst))
		goto out;

	ihdr = ip_hdr(skb);
	if (tpriv->double_vlan)
		ihdr = (struct iphdr *)(skb_network_header(skb) + 4);
	if (ihdr->protocol != IPPROTO_UDP)
		goto out;

	uhdr = (struct udphdr *)((u8 *)ihdr + 4 * ihdr->ihl);
	if (uhdr->dest != htons(tpriv->packet->dport))
		goto out;

	shdr = (struct stmmachdr *)((u8 *)uhdr + sizeof(*uhdr));
	if (shdr->magic != cpu_to_be64(STMMAC_TEST_PKT_MAGIC))
		goto out;

	tpriv->ok = true;
	complete(&tpriv->comp);

out:
	kfree_skb(skb);
	return 0;
}

static int stmmac_test_vlanfilt(struct stmmac_priv *priv)
{
	struct stmmac_packet_attrs attr = { };
	struct stmmac_test_priv *tpriv;
	struct sk_buff *skb = NULL;
	int ret = 0, i;

	if (!priv->dma_cap.vlhash)
		return -EOPNOTSUPP;

	tpriv = kzalloc(sizeof(*tpriv), GFP_KERNEL);
	if (!tpriv)
		return -ENOMEM;

	tpriv->ok = false;
	init_completion(&tpriv->comp);

	tpriv->pt.type = htons(ETH_P_IP);
	tpriv->pt.func = stmmac_test_vlan_validate;
	tpriv->pt.dev = priv->dev;
	tpriv->pt.af_packet_priv = tpriv;
	tpriv->packet = &attr;

	/*
	 * As we use HASH filtering, false positives may appear. This is a
	 * specially chosen ID so that adjacent IDs (+4) have different
	 * HASH values.
	 */
	tpriv->vlan_id = 0x123;
	dev_add_pack(&tpriv->pt);

	ret = vlan_vid_add(priv->dev, htons(ETH_P_8021Q), tpriv->vlan_id);
	if (ret)
		goto cleanup;

	for (i = 0; i < 4; i++) {
		attr.vlan = 1;
		attr.vlan_id_out = tpriv->vlan_id + i;
		attr.dst = priv->dev->dev_addr;
		attr.sport = 9;
		attr.dport = 9;

		skb = stmmac_test_get_udp_skb(priv, &attr);
		if (!skb) {
			ret = -ENOMEM;
			goto vlan_del;
		}

		skb_set_queue_mapping(skb, 0);
		ret = dev_queue_xmit(skb);
		if (ret)
			goto vlan_del;

		wait_for_completion_timeout(&tpriv->comp, STMMAC_LB_TIMEOUT);
		ret = tpriv->ok ? 0 : -ETIMEDOUT;
		if (ret && !i) {
			goto vlan_del;
		} else if (!ret && i) {
			ret = -EINVAL;
			goto vlan_del;
		} else {
			ret = 0;
		}

		tpriv->ok = false;
	}

vlan_del:
	vlan_vid_del(priv->dev, htons(ETH_P_8021Q), tpriv->vlan_id);
cleanup:
	dev_remove_pack(&tpriv->pt);
	kfree(tpriv);
	return ret;
}

static int stmmac_test_dvlanfilt(struct stmmac_priv *priv)
{
	struct stmmac_packet_attrs attr = { };
	struct stmmac_test_priv *tpriv;
	struct sk_buff *skb = NULL;
	int ret = 0, i;

	if (!priv->dma_cap.vlhash)
		return -EOPNOTSUPP;

	tpriv = kzalloc(sizeof(*tpriv), GFP_KERNEL);
	if (!tpriv)
		return -ENOMEM;

	tpriv->ok = false;
	tpriv->double_vlan = true;
	init_completion(&tpriv->comp);

	tpriv->pt.type = htons(ETH_P_8021Q);
	tpriv->pt.func = stmmac_test_vlan_validate;
	tpriv->pt.dev = priv->dev;
	tpriv->pt.af_packet_priv = tpriv;
	tpriv->packet = &attr;

	/*
	 * As we use HASH filtering, false positives may appear. This is a
	 * specially chosen ID so that adjacent IDs (+4) have different
	 * HASH values.
	 */
	tpriv->vlan_id = 0x123;
	dev_add_pack(&tpriv->pt);

	ret = vlan_vid_add(priv->dev, htons(ETH_P_8021AD), tpriv->vlan_id);
	if (ret)
		goto cleanup;

	for (i = 0; i < 4; i++) {
		attr.vlan = 2;
		attr.vlan_id_out = tpriv->vlan_id + i;
		attr.dst = priv->dev->dev_addr;
		attr.sport = 9;
		attr.dport = 9;

		skb = stmmac_test_get_udp_skb(priv, &attr);
		if (!skb) {
			ret = -ENOMEM;
			goto vlan_del;
		}

		skb_set_queue_mapping(skb, 0);
		ret = dev_queue_xmit(skb);
		if (ret)
			goto vlan_del;

		wait_for_completion_timeout(&tpriv->comp, STMMAC_LB_TIMEOUT);
		ret = tpriv->ok ? 0 : -ETIMEDOUT;
		if (ret && !i) {
			goto vlan_del;
		} else if (!ret && i) {
			ret = -EINVAL;
			goto vlan_del;
		} else {
			ret = 0;
		}

		tpriv->ok = false;
	}

vlan_del:
	vlan_vid_del(priv->dev, htons(ETH_P_8021AD), tpriv->vlan_id);
cleanup:
	dev_remove_pack(&tpriv->pt);
	kfree(tpriv);
	return ret;
}

#ifdef CONFIG_NET_CLS_ACT
static int stmmac_test_rxp(struct stmmac_priv *priv)
{
	unsigned char addr[ETH_ALEN] = {0xde, 0xad, 0xbe, 0xef, 0x00, 0x00};
	struct tc_cls_u32_offload cls_u32 = { };
	struct stmmac_packet_attrs attr = { };
	struct tc_action **actions, *act;
	struct tc_u32_sel *sel;
	struct tcf_exts *exts;
	int ret, i, nk = 1;

	if (!tc_can_offload(priv->dev))
		return -EOPNOTSUPP;
	if (!priv->dma_cap.frpsel)
		return -EOPNOTSUPP;

	sel = kzalloc(sizeof(*sel) + nk * sizeof(struct tc_u32_key), GFP_KERNEL);
	if (!sel)
		return -ENOMEM;

	exts = kzalloc(sizeof(*exts), GFP_KERNEL);
	if (!exts) {
		ret = -ENOMEM;
		goto cleanup_sel;
	}

	actions = kzalloc(nk * sizeof(*actions), GFP_KERNEL);
	if (!actions) {
		ret = -ENOMEM;
		goto cleanup_exts;
	}

	act = kzalloc(nk * sizeof(*act), GFP_KERNEL);
	if (!act) {
		ret = -ENOMEM;
		goto cleanup_actions;
	}

	cls_u32.command = TC_CLSU32_NEW_KNODE;
	cls_u32.common.chain_index = 0;
	cls_u32.common.protocol = htons(ETH_P_ALL);
	cls_u32.knode.exts = exts;
	cls_u32.knode.sel = sel;
	cls_u32.knode.handle = 0x123;

	exts->nr_actions = nk;
	exts->actions = actions;
	for (i = 0; i < nk; i++) {
		struct tcf_gact *gact = to_gact(&act[i]);

		actions[i] = &act[i];
		gact->tcf_action = TC_ACT_SHOT;
	}

	sel->nkeys = nk;
	sel->offshift = 0;
	sel->keys[0].off = 6;
	sel->keys[0].val = htonl(0xdeadbeef);
	sel->keys[0].mask = ~0x0;

	ret = stmmac_tc_setup_cls_u32(priv, priv, &cls_u32);
	if (ret)
		goto cleanup_act;

	attr.dst = priv->dev->dev_addr;
	attr.src = addr;

	ret = __stmmac_test_loopback(priv, &attr);
	ret = ret ? 0 : -EINVAL; /* Shall NOT receive packet */

	cls_u32.command = TC_CLSU32_DELETE_KNODE;
	stmmac_tc_setup_cls_u32(priv, priv, &cls_u32);

cleanup_act:
	kfree(act);
cleanup_actions:
	kfree(actions);
cleanup_exts:
	kfree(exts);
cleanup_sel:
	kfree(sel);
	return ret;
}
#else
static int stmmac_test_rxp(struct stmmac_priv *priv)
{
	return -EOPNOTSUPP;
}
#endif

static int stmmac_test_desc_sai(struct stmmac_priv *priv)
{
	unsigned char src[ETH_ALEN] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
	struct stmmac_packet_attrs attr = { };
	int ret;

	if (!priv->dma_cap.vlins)
		return -EOPNOTSUPP;

	attr.remove_sa = true;
	attr.sarc = true;
	attr.src = src;
	attr.dst = priv->dev->dev_addr;

	priv->sarc_type = 0x1;

	ret = __stmmac_test_loopback(priv, &attr);

	priv->sarc_type = 0x0;
	return ret;
}

static int stmmac_test_desc_sar(struct stmmac_priv *priv)
{
	unsigned char src[ETH_ALEN] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
	struct stmmac_packet_attrs attr = { };
	int ret;

	if (!priv->dma_cap.vlins)
		return -EOPNOTSUPP;

	attr.sarc = true;
	attr.src = src;
	attr.dst = priv->dev->dev_addr;

	priv->sarc_type = 0x2;

	ret = __stmmac_test_loopback(priv, &attr);

	priv->sarc_type = 0x0;
	return ret;
}

static int stmmac_test_reg_sai(struct stmmac_priv *priv)
{
	unsigned char src[ETH_ALEN] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
	struct stmmac_packet_attrs attr = { };
	int ret;

	if (!priv->dma_cap.vlins)
		return -EOPNOTSUPP;

	attr.remove_sa = true;
	attr.sarc = true;
	attr.src = src;
	attr.dst = priv->dev->dev_addr;

	if (stmmac_sarc_configure(priv, priv->ioaddr, 0x2))
		return -EOPNOTSUPP;

	ret = __stmmac_test_loopback(priv, &attr);

	stmmac_sarc_configure(priv, priv->ioaddr, 0x0);
	return ret;
}

static int stmmac_test_reg_sar(struct stmmac_priv *priv)
{
	unsigned char src[ETH_ALEN] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
	struct stmmac_packet_attrs attr = { };
	int ret;

	if (!priv->dma_cap.vlins)
		return -EOPNOTSUPP;

	attr.sarc = true;
	attr.src = src;
	attr.dst = priv->dev->dev_addr;

	if (stmmac_sarc_configure(priv, priv->ioaddr, 0x3))
		return -EOPNOTSUPP;

	ret = __stmmac_test_loopback(priv, &attr);

	stmmac_sarc_configure(priv, priv->ioaddr, 0x0);
	return ret;
}

static int stmmac_test_vlanoff_common(struct stmmac_priv *priv, bool svlan)
{
	struct stmmac_packet_attrs attr = { };
	struct stmmac_test_priv *tpriv;
	struct sk_buff *skb = NULL;
	int ret = 0;
	u16 proto;

	if (!priv->dma_cap.vlins)
		return -EOPNOTSUPP;

	tpriv = kzalloc(sizeof(*tpriv), GFP_KERNEL);
	if (!tpriv)
		return -ENOMEM;

	proto = svlan ? ETH_P_8021AD : ETH_P_8021Q;

	tpriv->ok = false;
	tpriv->double_vlan = svlan;
	init_completion(&tpriv->comp);

	tpriv->pt.type = svlan ? htons(ETH_P_8021Q) : htons(ETH_P_IP);
	tpriv->pt.func = stmmac_test_vlan_validate;
	tpriv->pt.dev = priv->dev;
	tpriv->pt.af_packet_priv = tpriv;
	tpriv->packet = &attr;
	tpriv->vlan_id = 0x123;
	dev_add_pack(&tpriv->pt);

	ret = vlan_vid_add(priv->dev, htons(proto), tpriv->vlan_id);
	if (ret)
		goto cleanup;

	attr.dst = priv->dev->dev_addr;

	skb = stmmac_test_get_udp_skb(priv, &attr);
	if (!skb) {
		ret = -ENOMEM;
		goto vlan_del;
	}

	__vlan_hwaccel_put_tag(skb, htons(proto), tpriv->vlan_id);
	skb->protocol = htons(proto);

	skb_set_queue_mapping(skb, 0);
	ret = dev_queue_xmit(skb);
	if (ret)
		goto vlan_del;

	wait_for_completion_timeout(&tpriv->comp, STMMAC_LB_TIMEOUT);
	ret = tpriv->ok ? 0 : -ETIMEDOUT;

vlan_del:
	vlan_vid_del(priv->dev, htons(proto), tpriv->vlan_id);
cleanup:
	dev_remove_pack(&tpriv->pt);
	kfree(tpriv);
	return ret;
}

static int stmmac_test_vlanoff(struct stmmac_priv *priv)
{
	return stmmac_test_vlanoff_common(priv, false);
}

static int stmmac_test_svlanoff(struct stmmac_priv *priv)
{
	if (!priv->dma_cap.dvlan)
		return -EOPNOTSUPP;
	return stmmac_test_vlanoff_common(priv, true);
}

#ifdef CONFIG_NET_CLS_ACT
static int __stmmac_test_l3filt(struct stmmac_priv *priv, u32 dst, u32 src,
				u32 dst_mask, u32 src_mask)
{
	struct flow_dissector_key_ipv4_addrs key, mask;
	unsigned long dummy_cookie = 0xdeadbeef;
	struct stmmac_packet_attrs attr = { };
	struct flow_dissector *dissector;
	struct flow_cls_offload *cls;
	int ret, old_enable = 0;
	struct flow_rule *rule;

	if (!tc_can_offload(priv->dev))
		return -EOPNOTSUPP;
	if (!priv->dma_cap.l3l4fnum)
		return -EOPNOTSUPP;
	if (priv->rss.enable) {
		old_enable = priv->rss.enable;
		priv->rss.enable = false;
		stmmac_rss_configure(priv, priv->hw, NULL,
				     priv->plat->rx_queues_to_use);
	}

	dissector = kzalloc(sizeof(*dissector), GFP_KERNEL);
	if (!dissector) {
		ret = -ENOMEM;
		goto cleanup_rss;
	}

	dissector->used_keys |= (1 << FLOW_DISSECTOR_KEY_IPV4_ADDRS);
	dissector->offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] = 0;

	cls = kzalloc(sizeof(*cls), GFP_KERNEL);
	if (!cls) {
		ret = -ENOMEM;
		goto cleanup_dissector;
	}

	cls->common.chain_index = 0;
	cls->command = FLOW_CLS_REPLACE;
	cls->cookie = dummy_cookie;

	rule = kzalloc(struct_size(rule, action.entries, 1), GFP_KERNEL);
	if (!rule) {
		ret = -ENOMEM;
		goto cleanup_cls;
	}

	rule->match.dissector = dissector;
	rule->match.key = (void *)&key;
	rule->match.mask = (void *)&mask;

	key.src = htonl(src);
	key.dst = htonl(dst);
	mask.src = src_mask;
	mask.dst = dst_mask;

	cls->rule = rule;

	rule->action.entries[0].id = FLOW_ACTION_DROP;
	rule->action.num_entries = 1;

	attr.dst = priv->dev->dev_addr;
	attr.ip_dst = dst;
	attr.ip_src = src;

	/* Shall receive packet */
	ret = __stmmac_test_loopback(priv, &attr);
	if (ret)
		goto cleanup_rule;

	ret = stmmac_tc_setup_cls(priv, priv, cls);
	if (ret)
		goto cleanup_rule;

	/* Shall NOT receive packet */
	ret = __stmmac_test_loopback(priv, &attr);
	ret = ret ? 0 : -EINVAL;

	cls->command = FLOW_CLS_DESTROY;
	stmmac_tc_setup_cls(priv, priv, cls);
cleanup_rule:
	kfree(rule);
cleanup_cls:
	kfree(cls);
cleanup_dissector:
	kfree(dissector);
cleanup_rss:
	if (old_enable) {
		priv->rss.enable = old_enable;
		stmmac_rss_configure(priv, priv->hw, &priv->rss,
				     priv->plat->rx_queues_to_use);
	}

	return ret;
}
#else
static int __stmmac_test_l3filt(struct stmmac_priv *priv, u32 dst, u32 src,
				u32 dst_mask, u32 src_mask)
{
	return -EOPNOTSUPP;
}
#endif

static int stmmac_test_l3filt_da(struct stmmac_priv *priv)
{
	u32 addr = 0x10203040;

	return __stmmac_test_l3filt(priv, addr, 0, ~0, 0);
}

static int stmmac_test_l3filt_sa(struct stmmac_priv *priv)
{
	u32 addr = 0x10203040;

	return __stmmac_test_l3filt(priv, 0, addr, 0, ~0);
}

#ifdef CONFIG_NET_CLS_ACT
static int __stmmac_test_l4filt(struct stmmac_priv *priv, u32 dst, u32 src,
				u32 dst_mask, u32 src_mask, bool udp)
{
	struct {
		struct flow_dissector_key_basic bkey;
		struct flow_dissector_key_ports key;
	} __aligned(BITS_PER_LONG / 8) keys;
	struct {
		struct flow_dissector_key_basic bmask;
		struct flow_dissector_key_ports mask;
	} __aligned(BITS_PER_LONG / 8) masks;
	unsigned long dummy_cookie = 0xdeadbeef;
	struct stmmac_packet_attrs attr = { };
	struct flow_dissector *dissector;
	struct flow_cls_offload *cls;
	int ret, old_enable = 0;
	struct flow_rule *rule;

	if (!tc_can_offload(priv->dev))
		return -EOPNOTSUPP;
	if (!priv->dma_cap.l3l4fnum)
		return -EOPNOTSUPP;
	if (priv->rss.enable) {
		old_enable = priv->rss.enable;
		priv->rss.enable = false;
		stmmac_rss_configure(priv, priv->hw, NULL,
				     priv->plat->rx_queues_to_use);
	}

	dissector = kzalloc(sizeof(*dissector), GFP_KERNEL);
	if (!dissector) {
		ret = -ENOMEM;
		goto cleanup_rss;
	}

	dissector->used_keys |= (1 << FLOW_DISSECTOR_KEY_BASIC);
	dissector->used_keys |= (1 << FLOW_DISSECTOR_KEY_PORTS);
	dissector->offset[FLOW_DISSECTOR_KEY_BASIC] = 0;
	dissector->offset[FLOW_DISSECTOR_KEY_PORTS] = offsetof(typeof(keys), key);

	cls = kzalloc(sizeof(*cls), GFP_KERNEL);
	if (!cls) {
		ret = -ENOMEM;
		goto cleanup_dissector;
	}

	cls->common.chain_index = 0;
	cls->command = FLOW_CLS_REPLACE;
	cls->cookie = dummy_cookie;

	rule = kzalloc(struct_size(rule, action.entries, 1), GFP_KERNEL);
	if (!rule) {
		ret = -ENOMEM;
		goto cleanup_cls;
	}

	rule->match.dissector = dissector;
	rule->match.key = (void *)&keys;
	rule->match.mask = (void *)&masks;

	keys.bkey.ip_proto = udp ? IPPROTO_UDP : IPPROTO_TCP;
	keys.key.src = htons(src);
	keys.key.dst = htons(dst);
	masks.mask.src = src_mask;
	masks.mask.dst = dst_mask;

	cls->rule = rule;

	rule->action.entries[0].id = FLOW_ACTION_DROP;
	rule->action.num_entries = 1;

	attr.dst = priv->dev->dev_addr;
	attr.tcp = !udp;
	attr.sport = src;
	attr.dport = dst;
	attr.ip_dst = 0;

	/* Shall receive packet */
	ret = __stmmac_test_loopback(priv, &attr);
	if (ret)
		goto cleanup_rule;

	ret = stmmac_tc_setup_cls(priv, priv, cls);
	if (ret)
		goto cleanup_rule;

	/* Shall NOT receive packet */
	ret = __stmmac_test_loopback(priv, &attr);
	ret = ret ? 0 : -EINVAL;

	cls->command = FLOW_CLS_DESTROY;
	stmmac_tc_setup_cls(priv, priv, cls);
cleanup_rule:
	kfree(rule);
cleanup_cls:
	kfree(cls);
cleanup_dissector:
	kfree(dissector);
cleanup_rss:
	if (old_enable) {
		priv->rss.enable = old_enable;
		stmmac_rss_configure(priv, priv->hw, &priv->rss,
				     priv->plat->rx_queues_to_use);
	}

	return ret;
}
#else
static int __stmmac_test_l4filt(struct stmmac_priv *priv, u32 dst, u32 src,
				u32 dst_mask, u32 src_mask, bool udp)
{
	return -EOPNOTSUPP;
}
#endif

static int stmmac_test_l4filt_da_tcp(struct stmmac_priv *priv)
{
	u16 dummy_port = 0x123;

	return __stmmac_test_l4filt(priv, dummy_port, 0, ~0, 0, false);
}

static int stmmac_test_l4filt_sa_tcp(struct stmmac_priv *priv)
{
	u16 dummy_port = 0x123;

	return __stmmac_test_l4filt(priv, 0, dummy_port, 0, ~0, false);
}

static int stmmac_test_l4filt_da_udp(struct stmmac_priv *priv)
{
	u16 dummy_port = 0x123;

	return __stmmac_test_l4filt(priv, dummy_port, 0, ~0, 0, true);
}

static int stmmac_test_l4filt_sa_udp(struct stmmac_priv *priv)
{
	u16 dummy_port = 0x123;

	return __stmmac_test_l4filt(priv, 0, dummy_port, 0, ~0, true);
}

static int stmmac_test_arp_validate(struct sk_buff *skb,
				    struct net_device *ndev,
				    struct packet_type *pt,
				    struct net_device *orig_ndev)
{
	struct stmmac_test_priv *tpriv = pt->af_packet_priv;
	struct ethhdr *ehdr;
	struct arphdr *ahdr;

	ehdr = (struct ethhdr *)skb_mac_header(skb);
	if (!ether_addr_equal_unaligned(ehdr->h_dest, tpriv->packet->src))
		goto out;

	ahdr = arp_hdr(skb);
	if (ahdr->ar_op != htons(ARPOP_REPLY))
		goto out;

	tpriv->ok = true;
	complete(&tpriv->comp);
out:
	kfree_skb(skb);
	return 0;
}

static int stmmac_test_arpoffload(struct stmmac_priv *priv)
{
	unsigned char src[ETH_ALEN] = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06};
	unsigned char dst[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
	struct stmmac_packet_attrs attr = { };
	struct stmmac_test_priv *tpriv;
	struct sk_buff *skb = NULL;
	u32 ip_addr = 0xdeadcafe;
	u32 ip_src = 0xdeadbeef;
	int ret;

	if (!priv->dma_cap.arpoffsel)
		return -EOPNOTSUPP;

	tpriv = kzalloc(sizeof(*tpriv), GFP_KERNEL);
	if (!tpriv)
		return -ENOMEM;

	tpriv->ok = false;
	init_completion(&tpriv->comp);

	tpriv->pt.type = htons(ETH_P_ARP);
	tpriv->pt.func = stmmac_test_arp_validate;
	tpriv->pt.dev = priv->dev;
	tpriv->pt.af_packet_priv = tpriv;
	tpriv->packet = &attr;
	dev_add_pack(&tpriv->pt);

	attr.src = src;
	attr.ip_src = ip_src;
	attr.dst = dst;
	attr.ip_dst = ip_addr;

	skb = stmmac_test_get_arp_skb(priv, &attr);
	if (!skb) {
		ret = -ENOMEM;
		goto cleanup;
	}

	ret = stmmac_set_arp_offload(priv, priv->hw, true, ip_addr);
	if (ret)
		goto cleanup;

	ret = dev_set_promiscuity(priv->dev, 1);
	if (ret)
		goto cleanup;

	skb_set_queue_mapping(skb, 0);
	ret = dev_queue_xmit(skb);
	if (ret)
		goto cleanup_promisc;

	wait_for_completion_timeout(&tpriv->comp, STMMAC_LB_TIMEOUT);
	ret = tpriv->ok ? 0 : -ETIMEDOUT;

cleanup_promisc:
	dev_set_promiscuity(priv->dev, -1);
cleanup:
	stmmac_set_arp_offload(priv, priv->hw, false, 0x0);
	dev_remove_pack(&tpriv->pt);
	kfree(tpriv);
	return ret;
}

static int __stmmac_test_jumbo(struct stmmac_priv *priv, u16 queue)
{
	struct stmmac_packet_attrs attr = { };
	int size = priv->dma_buf_sz;

	attr.dst = priv->dev->dev_addr;
	attr.max_size = size - ETH_FCS_LEN;
	attr.queue_mapping = queue;

	return __stmmac_test_loopback(priv, &attr);
}

static int stmmac_test_jumbo(struct stmmac_priv *priv)
{
	return __stmmac_test_jumbo(priv, 0);
}

static int stmmac_test_mjumbo(struct stmmac_priv *priv)
{
	u32 chan, tx_cnt = priv->plat->tx_queues_to_use;
	int ret;

	if (tx_cnt <= 1)
		return -EOPNOTSUPP;

	for (chan = 0; chan < tx_cnt; chan++) {
		ret = __stmmac_test_jumbo(priv, chan);
		if (ret)
			return ret;
	}

	return 0;
}

static int stmmac_test_sph(struct stmmac_priv *priv)
{
	unsigned long cnt_end, cnt_start = priv->xstats.rx_split_hdr_pkt_n;
	struct stmmac_packet_attrs attr = { };
	int ret;

	if (!priv->sph)
		return -EOPNOTSUPP;

	/* Check for UDP first */
	attr.dst = priv->dev->dev_addr;
	attr.tcp = false;

	ret = __stmmac_test_loopback(priv, &attr);
	if (ret)
		return ret;

	cnt_end = priv->xstats.rx_split_hdr_pkt_n;
	if (cnt_end <= cnt_start)
		return -EINVAL;

	/* Check for TCP now */
	cnt_start = cnt_end;

	attr.dst = priv->dev->dev_addr;
	attr.tcp = true;

	ret = __stmmac_test_loopback(priv, &attr);
	if (ret)
		return ret;

	cnt_end = priv->xstats.rx_split_hdr_pkt_n;
	if (cnt_end <= cnt_start)
		return -EINVAL;

	return 0;
}

#define STMMAC_LOOPBACK_NONE	0
#define STMMAC_LOOPBACK_MAC	1
#define STMMAC_LOOPBACK_PHY	2

static const struct stmmac_test {
	char name[ETH_GSTRING_LEN];
	int lb;
	int (*fn)(struct stmmac_priv *priv);
} stmmac_selftests[] = {
	{
		.name = "MAC Loopback         ",
		.lb = STMMAC_LOOPBACK_MAC,
		.fn = stmmac_test_mac_loopback,
	}, {
		.name = "PHY Loopback         ",
		.lb = STMMAC_LOOPBACK_NONE, /* Test will handle it */
		.fn = stmmac_test_phy_loopback,
	}, {
		.name = "MMC Counters         ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_mmc,
	}, {
		.name = "EEE                  ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_eee,
	}, {
		.name = "Hash Filter MC       ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_hfilt,
	}, {
		.name = "Perfect Filter UC    ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_pfilt,
	}, {
		.name = "MC Filter            ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_mcfilt,
	}, {
		.name = "UC Filter            ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_ucfilt,
	}, {
		.name = "Flow Control         ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_flowctrl,
	}, {
		.name = "RSS                  ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_rss,
	}, {
		.name = "VLAN Filtering       ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_vlanfilt,
	}, {
		.name = "Double VLAN Filtering",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_dvlanfilt,
	}, {
		.name = "Flexible RX Parser   ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_rxp,
	}, {
		.name = "SA Insertion (desc)  ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_desc_sai,
	}, {
		.name = "SA Replacement (desc)",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_desc_sar,
	}, {
		.name = "SA Insertion (reg)  ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_reg_sai,
	}, {
		.name = "SA Replacement (reg)",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_reg_sar,
	}, {
		.name = "VLAN TX Insertion   ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_vlanoff,
	}, {
		.name = "SVLAN TX Insertion  ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_svlanoff,
	}, {
		.name = "L3 DA Filtering     ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_l3filt_da,
	}, {
		.name = "L3 SA Filtering     ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_l3filt_sa,
	}, {
		.name = "L4 DA TCP Filtering ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_l4filt_da_tcp,
	}, {
		.name = "L4 SA TCP Filtering ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_l4filt_sa_tcp,
	}, {
		.name = "L4 DA UDP Filtering ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_l4filt_da_udp,
	}, {
		.name = "L4 SA UDP Filtering ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_l4filt_sa_udp,
	}, {
		.name = "ARP Offload         ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_arpoffload,
	}, {
		.name = "Jumbo Frame         ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_jumbo,
	}, {
		.name = "Multichannel Jumbo  ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_mjumbo,
	}, {
		.name = "Split Header        ",
		.lb = STMMAC_LOOPBACK_PHY,
		.fn = stmmac_test_sph,
	},
};

void stmmac_selftest_run(struct net_device *dev,
			 struct ethtool_test *etest, u64 *buf)
{
	struct stmmac_priv *priv = netdev_priv(dev);
	int count = stmmac_selftest_get_count(priv);
	int carrier = netif_carrier_ok(dev);
	int i, ret;

	memset(buf, 0, sizeof(*buf) * count);
	stmmac_test_next_id = 0;

	if (etest->flags != ETH_TEST_FL_OFFLINE) {
		netdev_err(priv->dev, "Only offline tests are supported\n");
		etest->flags |= ETH_TEST_FL_FAILED;
		return;
	} else if (!carrier) {
		netdev_err(priv->dev, "You need valid Link to execute tests\n");
		etest->flags |= ETH_TEST_FL_FAILED;
		return;
	}

	/* We don't want extra traffic */
	netif_carrier_off(dev);

	/* Wait for queues drain */
	msleep(200);

	for (i = 0; i < count; i++) {
		ret = 0;

		switch (stmmac_selftests[i].lb) {
		case STMMAC_LOOPBACK_PHY:
			ret = -EOPNOTSUPP;
			if (dev->phydev)
				ret = phy_loopback(dev->phydev, true);
			if (!ret)
				break;
			/* Fallthrough */
		case STMMAC_LOOPBACK_MAC:
			ret = stmmac_set_mac_loopback(priv, priv->ioaddr, true);
			break;
		case STMMAC_LOOPBACK_NONE:
			break;
		default:
			ret = -EOPNOTSUPP;
			break;
		}

		/*
		 * First tests will always be MAC / PHY loobpack. If any of
		 * them is not supported we abort earlier.
		 */
		if (ret) {
			netdev_err(priv->dev, "Loopback is not supported\n");
			etest->flags |= ETH_TEST_FL_FAILED;
			break;
		}

		ret = stmmac_selftests[i].fn(priv);
		if (ret && (ret != -EOPNOTSUPP))
			etest->flags |= ETH_TEST_FL_FAILED;
		buf[i] = ret;

		switch (stmmac_selftests[i].lb) {
		case STMMAC_LOOPBACK_PHY:
			ret = -EOPNOTSUPP;
			if (dev->phydev)
				ret = phy_loopback(dev->phydev, false);
			if (!ret)
				break;
			/* Fallthrough */
		case STMMAC_LOOPBACK_MAC:
			stmmac_set_mac_loopback(priv, priv->ioaddr, false);
			break;
		default:
			break;
		}
	}

	/* Restart everything */
	if (carrier)
		netif_carrier_on(dev);
}

void stmmac_selftest_get_strings(struct stmmac_priv *priv, u8 *data)
{
	u8 *p = data;
	int i;

	for (i = 0; i < stmmac_selftest_get_count(priv); i++) {
		snprintf(p, ETH_GSTRING_LEN, "%2d. %s", i + 1,
			 stmmac_selftests[i].name);
		p += ETH_GSTRING_LEN;
	}
}

int stmmac_selftest_get_count(struct stmmac_priv *priv)
{
	return ARRAY_SIZE(stmmac_selftests);
}
