qede_main.c 89.3 KB
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/* QLogic qede NIC Driver
* Copyright (c) 2015 QLogic Corporation
*
* This software is available 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.
*/

#include <linux/module.h>
#include <linux/pci.h>
#include <linux/version.h>
#include <linux/device.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/errno.h>
#include <linux/list.h>
#include <linux/string.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <asm/byteorder.h>
#include <asm/param.h>
#include <linux/io.h>
#include <linux/netdev_features.h>
#include <linux/udp.h>
#include <linux/tcp.h>
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#ifdef CONFIG_QEDE_VXLAN
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#include <net/vxlan.h>
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#endif
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#include <linux/ip.h>
#include <net/ipv6.h>
#include <net/tcp.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <linux/pkt_sched.h>
#include <linux/ethtool.h>
#include <linux/in.h>
#include <linux/random.h>
#include <net/ip6_checksum.h>
#include <linux/bitops.h>

#include "qede.h"

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static char version[] =
	"QLogic FastLinQ 4xxxx Ethernet Driver qede " DRV_MODULE_VERSION "\n";
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MODULE_DESCRIPTION("QLogic FastLinQ 4xxxx Ethernet Driver");
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MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_MODULE_VERSION);

static uint debug;
module_param(debug, uint, 0);
MODULE_PARM_DESC(debug, " Default debug msglevel");

static const struct qed_eth_ops *qed_ops;

#define CHIP_NUM_57980S_40		0x1634
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#define CHIP_NUM_57980S_10		0x1666
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#define CHIP_NUM_57980S_MF		0x1636
#define CHIP_NUM_57980S_100		0x1644
#define CHIP_NUM_57980S_50		0x1654
#define CHIP_NUM_57980S_25		0x1656

#ifndef PCI_DEVICE_ID_NX2_57980E
#define PCI_DEVICE_ID_57980S_40		CHIP_NUM_57980S_40
#define PCI_DEVICE_ID_57980S_10		CHIP_NUM_57980S_10
#define PCI_DEVICE_ID_57980S_MF		CHIP_NUM_57980S_MF
#define PCI_DEVICE_ID_57980S_100	CHIP_NUM_57980S_100
#define PCI_DEVICE_ID_57980S_50		CHIP_NUM_57980S_50
#define PCI_DEVICE_ID_57980S_25		CHIP_NUM_57980S_25
#endif

static const struct pci_device_id qede_pci_tbl[] = {
	{ PCI_VDEVICE(QLOGIC, PCI_DEVICE_ID_57980S_40), 0 },
	{ PCI_VDEVICE(QLOGIC, PCI_DEVICE_ID_57980S_10), 0 },
	{ PCI_VDEVICE(QLOGIC, PCI_DEVICE_ID_57980S_MF), 0 },
	{ PCI_VDEVICE(QLOGIC, PCI_DEVICE_ID_57980S_100), 0 },
	{ PCI_VDEVICE(QLOGIC, PCI_DEVICE_ID_57980S_50), 0 },
	{ PCI_VDEVICE(QLOGIC, PCI_DEVICE_ID_57980S_25), 0 },
	{ 0 }
};

MODULE_DEVICE_TABLE(pci, qede_pci_tbl);

static int qede_probe(struct pci_dev *pdev, const struct pci_device_id *id);

#define TX_TIMEOUT		(5 * HZ)

static void qede_remove(struct pci_dev *pdev);
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static int qede_alloc_rx_buffer(struct qede_dev *edev,
				struct qede_rx_queue *rxq);
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static void qede_link_update(void *dev, struct qed_link_output *link);
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static struct pci_driver qede_pci_driver = {
	.name = "qede",
	.id_table = qede_pci_tbl,
	.probe = qede_probe,
	.remove = qede_remove,
};

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static struct qed_eth_cb_ops qede_ll_ops = {
	{
		.link_update = qede_link_update,
	},
};

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static int qede_netdev_event(struct notifier_block *this, unsigned long event,
			     void *ptr)
{
	struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
	struct ethtool_drvinfo drvinfo;
	struct qede_dev *edev;

	/* Currently only support name change */
	if (event != NETDEV_CHANGENAME)
		goto done;

	/* Check whether this is a qede device */
	if (!ndev || !ndev->ethtool_ops || !ndev->ethtool_ops->get_drvinfo)
		goto done;

	memset(&drvinfo, 0, sizeof(drvinfo));
	ndev->ethtool_ops->get_drvinfo(ndev, &drvinfo);
	if (strcmp(drvinfo.driver, "qede"))
		goto done;
	edev = netdev_priv(ndev);

	/* Notify qed of the name change */
	if (!edev->ops || !edev->ops->common)
		goto done;
	edev->ops->common->set_id(edev->cdev, edev->ndev->name,
				  "qede");

done:
	return NOTIFY_DONE;
}

static struct notifier_block qede_netdev_notifier = {
	.notifier_call = qede_netdev_event,
};

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static
int __init qede_init(void)
{
	int ret;

	pr_notice("qede_init: %s\n", version);

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	qed_ops = qed_get_eth_ops();
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	if (!qed_ops) {
		pr_notice("Failed to get qed ethtool operations\n");
		return -EINVAL;
	}

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	/* Must register notifier before pci ops, since we might miss
	 * interface rename after pci probe and netdev registeration.
	 */
	ret = register_netdevice_notifier(&qede_netdev_notifier);
	if (ret) {
		pr_notice("Failed to register netdevice_notifier\n");
		qed_put_eth_ops();
		return -EINVAL;
	}

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	ret = pci_register_driver(&qede_pci_driver);
	if (ret) {
		pr_notice("Failed to register driver\n");
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		unregister_netdevice_notifier(&qede_netdev_notifier);
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		qed_put_eth_ops();
		return -EINVAL;
	}

	return 0;
}

static void __exit qede_cleanup(void)
{
	pr_notice("qede_cleanup called\n");

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	unregister_netdevice_notifier(&qede_netdev_notifier);
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	pci_unregister_driver(&qede_pci_driver);
	qed_put_eth_ops();
}

module_init(qede_init);
module_exit(qede_cleanup);

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/* -------------------------------------------------------------------------
 * START OF FAST-PATH
 * -------------------------------------------------------------------------
 */

/* Unmap the data and free skb */
static int qede_free_tx_pkt(struct qede_dev *edev,
			    struct qede_tx_queue *txq,
			    int *len)
{
	u16 idx = txq->sw_tx_cons & NUM_TX_BDS_MAX;
	struct sk_buff *skb = txq->sw_tx_ring[idx].skb;
	struct eth_tx_1st_bd *first_bd;
	struct eth_tx_bd *tx_data_bd;
	int bds_consumed = 0;
	int nbds;
	bool data_split = txq->sw_tx_ring[idx].flags & QEDE_TSO_SPLIT_BD;
	int i, split_bd_len = 0;

	if (unlikely(!skb)) {
		DP_ERR(edev,
		       "skb is null for txq idx=%d txq->sw_tx_cons=%d txq->sw_tx_prod=%d\n",
		       idx, txq->sw_tx_cons, txq->sw_tx_prod);
		return -1;
	}

	*len = skb->len;

	first_bd = (struct eth_tx_1st_bd *)qed_chain_consume(&txq->tx_pbl);

	bds_consumed++;

	nbds = first_bd->data.nbds;

	if (data_split) {
		struct eth_tx_bd *split = (struct eth_tx_bd *)
			qed_chain_consume(&txq->tx_pbl);
		split_bd_len = BD_UNMAP_LEN(split);
		bds_consumed++;
	}
	dma_unmap_page(&edev->pdev->dev, BD_UNMAP_ADDR(first_bd),
		       BD_UNMAP_LEN(first_bd) + split_bd_len, DMA_TO_DEVICE);

	/* Unmap the data of the skb frags */
	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++, bds_consumed++) {
		tx_data_bd = (struct eth_tx_bd *)
			qed_chain_consume(&txq->tx_pbl);
		dma_unmap_page(&edev->pdev->dev, BD_UNMAP_ADDR(tx_data_bd),
			       BD_UNMAP_LEN(tx_data_bd), DMA_TO_DEVICE);
	}

	while (bds_consumed++ < nbds)
		qed_chain_consume(&txq->tx_pbl);

	/* Free skb */
	dev_kfree_skb_any(skb);
	txq->sw_tx_ring[idx].skb = NULL;
	txq->sw_tx_ring[idx].flags = 0;

	return 0;
}

/* Unmap the data and free skb when mapping failed during start_xmit */
static void qede_free_failed_tx_pkt(struct qede_dev *edev,
				    struct qede_tx_queue *txq,
				    struct eth_tx_1st_bd *first_bd,
				    int nbd,
				    bool data_split)
{
	u16 idx = txq->sw_tx_prod & NUM_TX_BDS_MAX;
	struct sk_buff *skb = txq->sw_tx_ring[idx].skb;
	struct eth_tx_bd *tx_data_bd;
	int i, split_bd_len = 0;

	/* Return prod to its position before this skb was handled */
	qed_chain_set_prod(&txq->tx_pbl,
			   le16_to_cpu(txq->tx_db.data.bd_prod),
			   first_bd);

	first_bd = (struct eth_tx_1st_bd *)qed_chain_produce(&txq->tx_pbl);

	if (data_split) {
		struct eth_tx_bd *split = (struct eth_tx_bd *)
					  qed_chain_produce(&txq->tx_pbl);
		split_bd_len = BD_UNMAP_LEN(split);
		nbd--;
	}

	dma_unmap_page(&edev->pdev->dev, BD_UNMAP_ADDR(first_bd),
		       BD_UNMAP_LEN(first_bd) + split_bd_len, DMA_TO_DEVICE);

	/* Unmap the data of the skb frags */
	for (i = 0; i < nbd; i++) {
		tx_data_bd = (struct eth_tx_bd *)
			qed_chain_produce(&txq->tx_pbl);
		if (tx_data_bd->nbytes)
			dma_unmap_page(&edev->pdev->dev,
				       BD_UNMAP_ADDR(tx_data_bd),
				       BD_UNMAP_LEN(tx_data_bd), DMA_TO_DEVICE);
	}

	/* Return again prod to its position before this skb was handled */
	qed_chain_set_prod(&txq->tx_pbl,
			   le16_to_cpu(txq->tx_db.data.bd_prod),
			   first_bd);

	/* Free skb */
	dev_kfree_skb_any(skb);
	txq->sw_tx_ring[idx].skb = NULL;
	txq->sw_tx_ring[idx].flags = 0;
}

static u32 qede_xmit_type(struct qede_dev *edev,
			  struct sk_buff *skb,
			  int *ipv6_ext)
{
	u32 rc = XMIT_L4_CSUM;
	__be16 l3_proto;

	if (skb->ip_summed != CHECKSUM_PARTIAL)
		return XMIT_PLAIN;

	l3_proto = vlan_get_protocol(skb);
	if (l3_proto == htons(ETH_P_IPV6) &&
	    (ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6))
		*ipv6_ext = 1;

	if (skb_is_gso(skb))
		rc |= XMIT_LSO;

	return rc;
}

static void qede_set_params_for_ipv6_ext(struct sk_buff *skb,
					 struct eth_tx_2nd_bd *second_bd,
					 struct eth_tx_3rd_bd *third_bd)
{
	u8 l4_proto;
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	u16 bd2_bits1 = 0, bd2_bits2 = 0;
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	bd2_bits1 |= (1 << ETH_TX_DATA_2ND_BD_IPV6_EXT_SHIFT);
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	bd2_bits2 |= ((((u8 *)skb_transport_header(skb) - skb->data) >> 1) &
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		     ETH_TX_DATA_2ND_BD_L4_HDR_START_OFFSET_W_MASK)
		    << ETH_TX_DATA_2ND_BD_L4_HDR_START_OFFSET_W_SHIFT;

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	bd2_bits1 |= (ETH_L4_PSEUDO_CSUM_CORRECT_LENGTH <<
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		      ETH_TX_DATA_2ND_BD_L4_PSEUDO_CSUM_MODE_SHIFT);

	if (vlan_get_protocol(skb) == htons(ETH_P_IPV6))
		l4_proto = ipv6_hdr(skb)->nexthdr;
	else
		l4_proto = ip_hdr(skb)->protocol;

	if (l4_proto == IPPROTO_UDP)
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		bd2_bits1 |= 1 << ETH_TX_DATA_2ND_BD_L4_UDP_SHIFT;
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	if (third_bd)
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		third_bd->data.bitfields |=
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			cpu_to_le16(((tcp_hdrlen(skb) / 4) &
				ETH_TX_DATA_3RD_BD_TCP_HDR_LEN_DW_MASK) <<
				ETH_TX_DATA_3RD_BD_TCP_HDR_LEN_DW_SHIFT);
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	second_bd->data.bitfields1 = cpu_to_le16(bd2_bits1);
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	second_bd->data.bitfields2 = cpu_to_le16(bd2_bits2);
}

static int map_frag_to_bd(struct qede_dev *edev,
			  skb_frag_t *frag,
			  struct eth_tx_bd *bd)
{
	dma_addr_t mapping;

	/* Map skb non-linear frag data for DMA */
	mapping = skb_frag_dma_map(&edev->pdev->dev, frag, 0,
				   skb_frag_size(frag),
				   DMA_TO_DEVICE);
	if (unlikely(dma_mapping_error(&edev->pdev->dev, mapping))) {
		DP_NOTICE(edev, "Unable to map frag - dropping packet\n");
		return -ENOMEM;
	}

	/* Setup the data pointer of the frag data */
	BD_SET_UNMAP_ADDR_LEN(bd, mapping, skb_frag_size(frag));

	return 0;
}

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/* +2 for 1st BD for headers and 2nd BD for headlen (if required) */
#if ((MAX_SKB_FRAGS + 2) > ETH_TX_MAX_BDS_PER_NON_LSO_PACKET)
static bool qede_pkt_req_lin(struct qede_dev *edev, struct sk_buff *skb,
			     u8 xmit_type)
{
	int allowed_frags = ETH_TX_MAX_BDS_PER_NON_LSO_PACKET - 1;

	if (xmit_type & XMIT_LSO) {
		int hlen;

		hlen = skb_transport_header(skb) +
		       tcp_hdrlen(skb) - skb->data;

		/* linear payload would require its own BD */
		if (skb_headlen(skb) > hlen)
			allowed_frags--;
	}

	return (skb_shinfo(skb)->nr_frags > allowed_frags);
}
#endif

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/* Main transmit function */
static
netdev_tx_t qede_start_xmit(struct sk_buff *skb,
			    struct net_device *ndev)
{
	struct qede_dev *edev = netdev_priv(ndev);
	struct netdev_queue *netdev_txq;
	struct qede_tx_queue *txq;
	struct eth_tx_1st_bd *first_bd;
	struct eth_tx_2nd_bd *second_bd = NULL;
	struct eth_tx_3rd_bd *third_bd = NULL;
	struct eth_tx_bd *tx_data_bd = NULL;
	u16 txq_index;
	u8 nbd = 0;
	dma_addr_t mapping;
	int rc, frag_idx = 0, ipv6_ext = 0;
	u8 xmit_type;
	u16 idx;
	u16 hlen;
	bool data_split;

	/* Get tx-queue context and netdev index */
	txq_index = skb_get_queue_mapping(skb);
	WARN_ON(txq_index >= QEDE_TSS_CNT(edev));
	txq = QEDE_TX_QUEUE(edev, txq_index);
	netdev_txq = netdev_get_tx_queue(ndev, txq_index);

	WARN_ON(qed_chain_get_elem_left(&txq->tx_pbl) <
			       (MAX_SKB_FRAGS + 1));

	xmit_type = qede_xmit_type(edev, skb, &ipv6_ext);

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#if ((MAX_SKB_FRAGS + 2) > ETH_TX_MAX_BDS_PER_NON_LSO_PACKET)
	if (qede_pkt_req_lin(edev, skb, xmit_type)) {
		if (skb_linearize(skb)) {
			DP_NOTICE(edev,
				  "SKB linearization failed - silently dropping this SKB\n");
			dev_kfree_skb_any(skb);
			return NETDEV_TX_OK;
		}
	}
#endif

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	/* Fill the entry in the SW ring and the BDs in the FW ring */
	idx = txq->sw_tx_prod & NUM_TX_BDS_MAX;
	txq->sw_tx_ring[idx].skb = skb;
	first_bd = (struct eth_tx_1st_bd *)
		   qed_chain_produce(&txq->tx_pbl);
	memset(first_bd, 0, sizeof(*first_bd));
	first_bd->data.bd_flags.bitfields =
		1 << ETH_TX_1ST_BD_FLAGS_START_BD_SHIFT;

	/* Map skb linear data for DMA and set in the first BD */
	mapping = dma_map_single(&edev->pdev->dev, skb->data,
				 skb_headlen(skb), DMA_TO_DEVICE);
	if (unlikely(dma_mapping_error(&edev->pdev->dev, mapping))) {
		DP_NOTICE(edev, "SKB mapping failed\n");
		qede_free_failed_tx_pkt(edev, txq, first_bd, 0, false);
		return NETDEV_TX_OK;
	}
	nbd++;
	BD_SET_UNMAP_ADDR_LEN(first_bd, mapping, skb_headlen(skb));

	/* In case there is IPv6 with extension headers or LSO we need 2nd and
	 * 3rd BDs.
	 */
	if (unlikely((xmit_type & XMIT_LSO) | ipv6_ext)) {
		second_bd = (struct eth_tx_2nd_bd *)
			qed_chain_produce(&txq->tx_pbl);
		memset(second_bd, 0, sizeof(*second_bd));

		nbd++;
		third_bd = (struct eth_tx_3rd_bd *)
			qed_chain_produce(&txq->tx_pbl);
		memset(third_bd, 0, sizeof(*third_bd));

		nbd++;
		/* We need to fill in additional data in second_bd... */
		tx_data_bd = (struct eth_tx_bd *)second_bd;
	}

	if (skb_vlan_tag_present(skb)) {
		first_bd->data.vlan = cpu_to_le16(skb_vlan_tag_get(skb));
		first_bd->data.bd_flags.bitfields |=
			1 << ETH_TX_1ST_BD_FLAGS_VLAN_INSERTION_SHIFT;
	}

	/* Fill the parsing flags & params according to the requested offload */
	if (xmit_type & XMIT_L4_CSUM) {
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		u16 temp = 1 << ETH_TX_DATA_1ST_BD_TUNN_CFG_OVERRIDE_SHIFT;

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		/* We don't re-calculate IP checksum as it is already done by
		 * the upper stack
		 */
		first_bd->data.bd_flags.bitfields |=
			1 << ETH_TX_1ST_BD_FLAGS_L4_CSUM_SHIFT;

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		first_bd->data.bitfields |= cpu_to_le16(temp);

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		/* If the packet is IPv6 with extension header, indicate that
		 * to FW and pass few params, since the device cracker doesn't
		 * support parsing IPv6 with extension header/s.
		 */
		if (unlikely(ipv6_ext))
			qede_set_params_for_ipv6_ext(skb, second_bd, third_bd);
	}

	if (xmit_type & XMIT_LSO) {
		first_bd->data.bd_flags.bitfields |=
			(1 << ETH_TX_1ST_BD_FLAGS_LSO_SHIFT);
		third_bd->data.lso_mss =
			cpu_to_le16(skb_shinfo(skb)->gso_size);

		first_bd->data.bd_flags.bitfields |=
		1 << ETH_TX_1ST_BD_FLAGS_IP_CSUM_SHIFT;
		hlen = skb_transport_header(skb) +
		       tcp_hdrlen(skb) - skb->data;

		/* @@@TBD - if will not be removed need to check */
		third_bd->data.bitfields |=
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			cpu_to_le16((1 << ETH_TX_DATA_3RD_BD_HDR_NBD_SHIFT));
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		/* Make life easier for FW guys who can't deal with header and
		 * data on same BD. If we need to split, use the second bd...
		 */
		if (unlikely(skb_headlen(skb) > hlen)) {
			DP_VERBOSE(edev, NETIF_MSG_TX_QUEUED,
				   "TSO split header size is %d (%x:%x)\n",
				   first_bd->nbytes, first_bd->addr.hi,
				   first_bd->addr.lo);

			mapping = HILO_U64(le32_to_cpu(first_bd->addr.hi),
					   le32_to_cpu(first_bd->addr.lo)) +
					   hlen;

			BD_SET_UNMAP_ADDR_LEN(tx_data_bd, mapping,
					      le16_to_cpu(first_bd->nbytes) -
					      hlen);

			/* this marks the BD as one that has no
			 * individual mapping
			 */
			txq->sw_tx_ring[idx].flags |= QEDE_TSO_SPLIT_BD;

			first_bd->nbytes = cpu_to_le16(hlen);

			tx_data_bd = (struct eth_tx_bd *)third_bd;
			data_split = true;
		}
	}

	/* Handle fragmented skb */
	/* special handle for frags inside 2nd and 3rd bds.. */
	while (tx_data_bd && frag_idx < skb_shinfo(skb)->nr_frags) {
		rc = map_frag_to_bd(edev,
				    &skb_shinfo(skb)->frags[frag_idx],
				    tx_data_bd);
		if (rc) {
			qede_free_failed_tx_pkt(edev, txq, first_bd, nbd,
						data_split);
			return NETDEV_TX_OK;
		}

		if (tx_data_bd == (struct eth_tx_bd *)second_bd)
			tx_data_bd = (struct eth_tx_bd *)third_bd;
		else
			tx_data_bd = NULL;

		frag_idx++;
	}

	/* map last frags into 4th, 5th .... */
	for (; frag_idx < skb_shinfo(skb)->nr_frags; frag_idx++, nbd++) {
		tx_data_bd = (struct eth_tx_bd *)
			     qed_chain_produce(&txq->tx_pbl);

		memset(tx_data_bd, 0, sizeof(*tx_data_bd));

		rc = map_frag_to_bd(edev,
				    &skb_shinfo(skb)->frags[frag_idx],
				    tx_data_bd);
		if (rc) {
			qede_free_failed_tx_pkt(edev, txq, first_bd, nbd,
						data_split);
			return NETDEV_TX_OK;
		}
	}

	/* update the first BD with the actual num BDs */
	first_bd->data.nbds = nbd;

	netdev_tx_sent_queue(netdev_txq, skb->len);

	skb_tx_timestamp(skb);

	/* Advance packet producer only before sending the packet since mapping
	 * of pages may fail.
	 */
	txq->sw_tx_prod++;

	/* 'next page' entries are counted in the producer value */
	txq->tx_db.data.bd_prod =
		cpu_to_le16(qed_chain_get_prod_idx(&txq->tx_pbl));

	/* wmb makes sure that the BDs data is updated before updating the
	 * producer, otherwise FW may read old data from the BDs.
	 */
	wmb();
	barrier();
	writel(txq->tx_db.raw, txq->doorbell_addr);

	/* mmiowb is needed to synchronize doorbell writes from more than one
	 * processor. It guarantees that the write arrives to the device before
	 * the queue lock is released and another start_xmit is called (possibly
	 * on another CPU). Without this barrier, the next doorbell can bypass
	 * this doorbell. This is applicable to IA64/Altix systems.
	 */
	mmiowb();

	if (unlikely(qed_chain_get_elem_left(&txq->tx_pbl)
		      < (MAX_SKB_FRAGS + 1))) {
		netif_tx_stop_queue(netdev_txq);
		DP_VERBOSE(edev, NETIF_MSG_TX_QUEUED,
			   "Stop queue was called\n");
		/* paired memory barrier is in qede_tx_int(), we have to keep
		 * ordering of set_bit() in netif_tx_stop_queue() and read of
		 * fp->bd_tx_cons
		 */
		smp_mb();

		if (qed_chain_get_elem_left(&txq->tx_pbl)
		     >= (MAX_SKB_FRAGS + 1) &&
		    (edev->state == QEDE_STATE_OPEN)) {
			netif_tx_wake_queue(netdev_txq);
			DP_VERBOSE(edev, NETIF_MSG_TX_QUEUED,
				   "Wake queue was called\n");
		}
	}

	return NETDEV_TX_OK;
}

static int qede_txq_has_work(struct qede_tx_queue *txq)
{
	u16 hw_bd_cons;

	/* Tell compiler that consumer and producer can change */
	barrier();
	hw_bd_cons = le16_to_cpu(*txq->hw_cons_ptr);
	if (qed_chain_get_cons_idx(&txq->tx_pbl) == hw_bd_cons + 1)
		return 0;

	return hw_bd_cons != qed_chain_get_cons_idx(&txq->tx_pbl);
}

static int qede_tx_int(struct qede_dev *edev,
		       struct qede_tx_queue *txq)
{
	struct netdev_queue *netdev_txq;
	u16 hw_bd_cons;
	unsigned int pkts_compl = 0, bytes_compl = 0;
	int rc;

	netdev_txq = netdev_get_tx_queue(edev->ndev, txq->index);

	hw_bd_cons = le16_to_cpu(*txq->hw_cons_ptr);
	barrier();

	while (hw_bd_cons != qed_chain_get_cons_idx(&txq->tx_pbl)) {
		int len = 0;

		rc = qede_free_tx_pkt(edev, txq, &len);
		if (rc) {
			DP_NOTICE(edev, "hw_bd_cons = %d, chain_cons=%d\n",
				  hw_bd_cons,
				  qed_chain_get_cons_idx(&txq->tx_pbl));
			break;
		}

		bytes_compl += len;
		pkts_compl++;
		txq->sw_tx_cons++;
	}

	netdev_tx_completed_queue(netdev_txq, pkts_compl, bytes_compl);

	/* Need to make the tx_bd_cons update visible to start_xmit()
	 * before checking for netif_tx_queue_stopped().  Without the
	 * memory barrier, there is a small possibility that
	 * start_xmit() will miss it and cause the queue to be stopped
	 * forever.
	 * On the other hand we need an rmb() here to ensure the proper
	 * ordering of bit testing in the following
	 * netif_tx_queue_stopped(txq) call.
	 */
	smp_mb();

	if (unlikely(netif_tx_queue_stopped(netdev_txq))) {
		/* Taking tx_lock is needed to prevent reenabling the queue
		 * while it's empty. This could have happen if rx_action() gets
		 * suspended in qede_tx_int() after the condition before
		 * netif_tx_wake_queue(), while tx_action (qede_start_xmit()):
		 *
		 * stops the queue->sees fresh tx_bd_cons->releases the queue->
		 * sends some packets consuming the whole queue again->
		 * stops the queue
		 */

		__netif_tx_lock(netdev_txq, smp_processor_id());

		if ((netif_tx_queue_stopped(netdev_txq)) &&
		    (edev->state == QEDE_STATE_OPEN) &&
		    (qed_chain_get_elem_left(&txq->tx_pbl)
		      >= (MAX_SKB_FRAGS + 1))) {
			netif_tx_wake_queue(netdev_txq);
			DP_VERBOSE(edev, NETIF_MSG_TX_DONE,
				   "Wake queue was called\n");
		}

		__netif_tx_unlock(netdev_txq);
	}

	return 0;
}

static bool qede_has_rx_work(struct qede_rx_queue *rxq)
{
	u16 hw_comp_cons, sw_comp_cons;

	/* Tell compiler that status block fields can change */
	barrier();

	hw_comp_cons = le16_to_cpu(*rxq->hw_cons_ptr);
	sw_comp_cons = qed_chain_get_cons_idx(&rxq->rx_comp_ring);

	return hw_comp_cons != sw_comp_cons;
}

static bool qede_has_tx_work(struct qede_fastpath *fp)
{
	u8 tc;

	for (tc = 0; tc < fp->edev->num_tc; tc++)
		if (qede_txq_has_work(&fp->txqs[tc]))
			return true;
	return false;
}

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/* This function reuses the buffer(from an offset) from
 * consumer index to producer index in the bd ring
748
 */
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static inline void qede_reuse_page(struct qede_dev *edev,
				   struct qede_rx_queue *rxq,
				   struct sw_rx_data *curr_cons)
752 753
{
	struct eth_rx_bd *rx_bd_prod = qed_chain_produce(&rxq->rx_bd_ring);
Y
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	struct sw_rx_data *curr_prod;
	dma_addr_t new_mapping;
756

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	curr_prod = &rxq->sw_rx_ring[rxq->sw_rx_prod & NUM_RX_BDS_MAX];
	*curr_prod = *curr_cons;
759

Y
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	new_mapping = curr_prod->mapping + curr_prod->page_offset;

	rx_bd_prod->addr.hi = cpu_to_le32(upper_32_bits(new_mapping));
	rx_bd_prod->addr.lo = cpu_to_le32(lower_32_bits(new_mapping));
764 765

	rxq->sw_rx_prod++;
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Yuval Mintz 已提交
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	curr_cons->data = NULL;
}

static inline int qede_realloc_rx_buffer(struct qede_dev *edev,
					 struct qede_rx_queue *rxq,
					 struct sw_rx_data *curr_cons)
{
	/* Move to the next segment in the page */
	curr_cons->page_offset += rxq->rx_buf_seg_size;

	if (curr_cons->page_offset == PAGE_SIZE) {
		if (unlikely(qede_alloc_rx_buffer(edev, rxq)))
			return -ENOMEM;

		dma_unmap_page(&edev->pdev->dev, curr_cons->mapping,
			       PAGE_SIZE, DMA_FROM_DEVICE);
	} else {
		/* Increment refcount of the page as we don't want
		 * network stack to take the ownership of the page
		 * which can be recycled multiple times by the driver.
		 */
		atomic_inc(&curr_cons->data->_count);
		qede_reuse_page(edev, rxq, curr_cons);
	}

	return 0;
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}

static inline void qede_update_rx_prod(struct qede_dev *edev,
				       struct qede_rx_queue *rxq)
{
	u16 bd_prod = qed_chain_get_prod_idx(&rxq->rx_bd_ring);
	u16 cqe_prod = qed_chain_get_prod_idx(&rxq->rx_comp_ring);
	struct eth_rx_prod_data rx_prods = {0};

	/* Update producers */
	rx_prods.bd_prod = cpu_to_le16(bd_prod);
	rx_prods.cqe_prod = cpu_to_le16(cqe_prod);

	/* Make sure that the BD and SGE data is updated before updating the
	 * producers since FW might read the BD/SGE right after the producer
	 * is updated.
	 */
	wmb();

	internal_ram_wr(rxq->hw_rxq_prod_addr, sizeof(rx_prods),
			(u32 *)&rx_prods);

	/* mmiowb is needed to synchronize doorbell writes from more than one
	 * processor. It guarantees that the write arrives to the device before
	 * the napi lock is released and another qede_poll is called (possibly
	 * on another CPU). Without this barrier, the next doorbell can bypass
	 * this doorbell. This is applicable to IA64/Altix systems.
	 */
	mmiowb();
}

static u32 qede_get_rxhash(struct qede_dev *edev,
			   u8 bitfields,
			   __le32 rss_hash,
			   enum pkt_hash_types *rxhash_type)
{
	enum rss_hash_type htype;

	htype = GET_FIELD(bitfields, ETH_FAST_PATH_RX_REG_CQE_RSS_HASH_TYPE);

	if ((edev->ndev->features & NETIF_F_RXHASH) && htype) {
		*rxhash_type = ((htype == RSS_HASH_TYPE_IPV4) ||
				(htype == RSS_HASH_TYPE_IPV6)) ?
				PKT_HASH_TYPE_L3 : PKT_HASH_TYPE_L4;
		return le32_to_cpu(rss_hash);
	}
	*rxhash_type = PKT_HASH_TYPE_NONE;
	return 0;
}

static void qede_set_skb_csum(struct sk_buff *skb, u8 csum_flag)
{
	skb_checksum_none_assert(skb);

	if (csum_flag & QEDE_CSUM_UNNECESSARY)
		skb->ip_summed = CHECKSUM_UNNECESSARY;
}

static inline void qede_skb_receive(struct qede_dev *edev,
				    struct qede_fastpath *fp,
				    struct sk_buff *skb,
				    u16 vlan_tag)
{
	if (vlan_tag)
		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
				       vlan_tag);

	napi_gro_receive(&fp->napi, skb);
}

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static void qede_set_gro_params(struct qede_dev *edev,
				struct sk_buff *skb,
				struct eth_fast_path_rx_tpa_start_cqe *cqe)
{
	u16 parsing_flags = le16_to_cpu(cqe->pars_flags.flags);

	if (((parsing_flags >> PARSING_AND_ERR_FLAGS_L3TYPE_SHIFT) &
	    PARSING_AND_ERR_FLAGS_L3TYPE_MASK) == 2)
		skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
	else
		skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;

	skb_shinfo(skb)->gso_size = __le16_to_cpu(cqe->len_on_first_bd) -
					cqe->header_len;
}

static int qede_fill_frag_skb(struct qede_dev *edev,
			      struct qede_rx_queue *rxq,
			      u8 tpa_agg_index,
			      u16 len_on_bd)
{
	struct sw_rx_data *current_bd = &rxq->sw_rx_ring[rxq->sw_rx_cons &
							 NUM_RX_BDS_MAX];
	struct qede_agg_info *tpa_info = &rxq->tpa_info[tpa_agg_index];
	struct sk_buff *skb = tpa_info->skb;

	if (unlikely(tpa_info->agg_state != QEDE_AGG_STATE_START))
		goto out;

	/* Add one frag and update the appropriate fields in the skb */
	skb_fill_page_desc(skb, tpa_info->frag_id++,
			   current_bd->data, current_bd->page_offset,
			   len_on_bd);

	if (unlikely(qede_realloc_rx_buffer(edev, rxq, current_bd))) {
		tpa_info->agg_state = QEDE_AGG_STATE_ERROR;
		goto out;
	}

	qed_chain_consume(&rxq->rx_bd_ring);
	rxq->sw_rx_cons++;

	skb->data_len += len_on_bd;
	skb->truesize += rxq->rx_buf_seg_size;
	skb->len += len_on_bd;

	return 0;

out:
	return -ENOMEM;
}

static void qede_tpa_start(struct qede_dev *edev,
			   struct qede_rx_queue *rxq,
			   struct eth_fast_path_rx_tpa_start_cqe *cqe)
{
	struct qede_agg_info *tpa_info = &rxq->tpa_info[cqe->tpa_agg_index];
	struct eth_rx_bd *rx_bd_cons = qed_chain_consume(&rxq->rx_bd_ring);
	struct eth_rx_bd *rx_bd_prod = qed_chain_produce(&rxq->rx_bd_ring);
	struct sw_rx_data *replace_buf = &tpa_info->replace_buf;
	dma_addr_t mapping = tpa_info->replace_buf_mapping;
	struct sw_rx_data *sw_rx_data_cons;
	struct sw_rx_data *sw_rx_data_prod;
	enum pkt_hash_types rxhash_type;
	u32 rxhash;

	sw_rx_data_cons = &rxq->sw_rx_ring[rxq->sw_rx_cons & NUM_RX_BDS_MAX];
	sw_rx_data_prod = &rxq->sw_rx_ring[rxq->sw_rx_prod & NUM_RX_BDS_MAX];

	/* Use pre-allocated replacement buffer - we can't release the agg.
	 * start until its over and we don't want to risk allocation failing
	 * here, so re-allocate when aggregation will be over.
	 */
	dma_unmap_addr_set(sw_rx_data_prod, mapping,
			   dma_unmap_addr(replace_buf, mapping));

	sw_rx_data_prod->data = replace_buf->data;
	rx_bd_prod->addr.hi = cpu_to_le32(upper_32_bits(mapping));
	rx_bd_prod->addr.lo = cpu_to_le32(lower_32_bits(mapping));
	sw_rx_data_prod->page_offset = replace_buf->page_offset;

	rxq->sw_rx_prod++;

	/* move partial skb from cons to pool (don't unmap yet)
	 * save mapping, incase we drop the packet later on.
	 */
	tpa_info->start_buf = *sw_rx_data_cons;
	mapping = HILO_U64(le32_to_cpu(rx_bd_cons->addr.hi),
			   le32_to_cpu(rx_bd_cons->addr.lo));

	tpa_info->start_buf_mapping = mapping;
	rxq->sw_rx_cons++;

	/* set tpa state to start only if we are able to allocate skb
	 * for this aggregation, otherwise mark as error and aggregation will
	 * be dropped
	 */
	tpa_info->skb = netdev_alloc_skb(edev->ndev,
					 le16_to_cpu(cqe->len_on_first_bd));
	if (unlikely(!tpa_info->skb)) {
		tpa_info->agg_state = QEDE_AGG_STATE_ERROR;
		return;
	}

	skb_put(tpa_info->skb, le16_to_cpu(cqe->len_on_first_bd));
	memcpy(&tpa_info->start_cqe, cqe, sizeof(tpa_info->start_cqe));

	/* Start filling in the aggregation info */
	tpa_info->frag_id = 0;
	tpa_info->agg_state = QEDE_AGG_STATE_START;

	rxhash = qede_get_rxhash(edev, cqe->bitfields,
				 cqe->rss_hash, &rxhash_type);
	skb_set_hash(tpa_info->skb, rxhash, rxhash_type);
	if ((le16_to_cpu(cqe->pars_flags.flags) >>
	     PARSING_AND_ERR_FLAGS_TAG8021QEXIST_SHIFT) &
		    PARSING_AND_ERR_FLAGS_TAG8021QEXIST_MASK)
		tpa_info->vlan_tag = le16_to_cpu(cqe->vlan_tag);
	else
		tpa_info->vlan_tag = 0;

	/* This is needed in order to enable forwarding support */
	qede_set_gro_params(edev, tpa_info->skb, cqe);

	if (likely(cqe->ext_bd_len_list[0]))
		qede_fill_frag_skb(edev, rxq, cqe->tpa_agg_index,
				   le16_to_cpu(cqe->ext_bd_len_list[0]));

	if (unlikely(cqe->ext_bd_len_list[1])) {
		DP_ERR(edev,
		       "Unlikely - got a TPA aggregation with more than one ext_bd_len_list entry in the TPA start\n");
		tpa_info->agg_state = QEDE_AGG_STATE_ERROR;
	}
}

997
#ifdef CONFIG_INET
998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025
static void qede_gro_ip_csum(struct sk_buff *skb)
{
	const struct iphdr *iph = ip_hdr(skb);
	struct tcphdr *th;

	skb_set_network_header(skb, 0);
	skb_set_transport_header(skb, sizeof(struct iphdr));
	th = tcp_hdr(skb);

	th->check = ~tcp_v4_check(skb->len - skb_transport_offset(skb),
				  iph->saddr, iph->daddr, 0);

	tcp_gro_complete(skb);
}

static void qede_gro_ipv6_csum(struct sk_buff *skb)
{
	struct ipv6hdr *iph = ipv6_hdr(skb);
	struct tcphdr *th;

	skb_set_network_header(skb, 0);
	skb_set_transport_header(skb, sizeof(struct ipv6hdr));
	th = tcp_hdr(skb);

	th->check = ~tcp_v6_check(skb->len - skb_transport_offset(skb),
				  &iph->saddr, &iph->daddr, 0);
	tcp_gro_complete(skb);
}
1026
#endif
1027 1028 1029 1030 1031 1032

static void qede_gro_receive(struct qede_dev *edev,
			     struct qede_fastpath *fp,
			     struct sk_buff *skb,
			     u16 vlan_tag)
{
1033
#ifdef CONFIG_INET
1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047
	if (skb_shinfo(skb)->gso_size) {
		switch (skb->protocol) {
		case htons(ETH_P_IP):
			qede_gro_ip_csum(skb);
			break;
		case htons(ETH_P_IPV6):
			qede_gro_ipv6_csum(skb);
			break;
		default:
			DP_ERR(edev,
			       "Error: FW GRO supports only IPv4/IPv6, not 0x%04x\n",
			       ntohs(skb->protocol));
		}
	}
1048
#endif
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	skb_record_rx_queue(skb, fp->rss_id);
	qede_skb_receive(edev, fp, skb, vlan_tag);
}

static inline void qede_tpa_cont(struct qede_dev *edev,
				 struct qede_rx_queue *rxq,
				 struct eth_fast_path_rx_tpa_cont_cqe *cqe)
{
	int i;

	for (i = 0; cqe->len_list[i]; i++)
		qede_fill_frag_skb(edev, rxq, cqe->tpa_agg_index,
				   le16_to_cpu(cqe->len_list[i]));

	if (unlikely(i > 1))
		DP_ERR(edev,
		       "Strange - TPA cont with more than a single len_list entry\n");
}

static void qede_tpa_end(struct qede_dev *edev,
			 struct qede_fastpath *fp,
			 struct eth_fast_path_rx_tpa_end_cqe *cqe)
{
	struct qede_rx_queue *rxq = fp->rxq;
	struct qede_agg_info *tpa_info;
	struct sk_buff *skb;
	int i;

	tpa_info = &rxq->tpa_info[cqe->tpa_agg_index];
	skb = tpa_info->skb;

	for (i = 0; cqe->len_list[i]; i++)
		qede_fill_frag_skb(edev, rxq, cqe->tpa_agg_index,
				   le16_to_cpu(cqe->len_list[i]));
	if (unlikely(i > 1))
		DP_ERR(edev,
		       "Strange - TPA emd with more than a single len_list entry\n");

	if (unlikely(tpa_info->agg_state != QEDE_AGG_STATE_START))
		goto err;

	/* Sanity */
	if (unlikely(cqe->num_of_bds != tpa_info->frag_id + 1))
		DP_ERR(edev,
		       "Strange - TPA had %02x BDs, but SKB has only %d frags\n",
		       cqe->num_of_bds, tpa_info->frag_id);
	if (unlikely(skb->len != le16_to_cpu(cqe->total_packet_len)))
		DP_ERR(edev,
		       "Strange - total packet len [cqe] is %4x but SKB has len %04x\n",
		       le16_to_cpu(cqe->total_packet_len), skb->len);

	memcpy(skb->data,
	       page_address(tpa_info->start_buf.data) +
		tpa_info->start_cqe.placement_offset +
		tpa_info->start_buf.page_offset,
	       le16_to_cpu(tpa_info->start_cqe.len_on_first_bd));

	/* Recycle [mapped] start buffer for the next replacement */
	tpa_info->replace_buf = tpa_info->start_buf;
	tpa_info->replace_buf_mapping = tpa_info->start_buf_mapping;

	/* Finalize the SKB */
	skb->protocol = eth_type_trans(skb, edev->ndev);
	skb->ip_summed = CHECKSUM_UNNECESSARY;

	/* tcp_gro_complete() will copy NAPI_GRO_CB(skb)->count
	 * to skb_shinfo(skb)->gso_segs
	 */
	NAPI_GRO_CB(skb)->count = le16_to_cpu(cqe->num_of_coalesced_segs);

	qede_gro_receive(edev, fp, skb, tpa_info->vlan_tag);

	tpa_info->agg_state = QEDE_AGG_STATE_NONE;

	return;
err:
	/* The BD starting the aggregation is still mapped; Re-use it for
	 * future aggregations [as replacement buffer]
	 */
	memcpy(&tpa_info->replace_buf, &tpa_info->start_buf,
	       sizeof(struct sw_rx_data));
	tpa_info->replace_buf_mapping = tpa_info->start_buf_mapping;
	tpa_info->start_buf.data = NULL;
	tpa_info->agg_state = QEDE_AGG_STATE_NONE;
	dev_kfree_skb_any(tpa_info->skb);
	tpa_info->skb = NULL;
}

1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184
static u8 qede_check_csum(u16 flag)
{
	u16 csum_flag = 0;
	u8 csum = 0;

	if ((PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_MASK <<
	     PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_SHIFT) & flag) {
		csum_flag |= PARSING_AND_ERR_FLAGS_L4CHKSMERROR_MASK <<
			     PARSING_AND_ERR_FLAGS_L4CHKSMERROR_SHIFT;
		csum = QEDE_CSUM_UNNECESSARY;
	}

	csum_flag |= PARSING_AND_ERR_FLAGS_IPHDRERROR_MASK <<
		     PARSING_AND_ERR_FLAGS_IPHDRERROR_SHIFT;

	if (csum_flag & flag)
		return QEDE_CSUM_ERROR;

	return csum;
}

static int qede_rx_int(struct qede_fastpath *fp, int budget)
{
	struct qede_dev *edev = fp->edev;
	struct qede_rx_queue *rxq = fp->rxq;

	u16 hw_comp_cons, sw_comp_cons, sw_rx_index, parse_flag;
	int rx_pkt = 0;
	u8 csum_flag;

	hw_comp_cons = le16_to_cpu(*rxq->hw_cons_ptr);
	sw_comp_cons = qed_chain_get_cons_idx(&rxq->rx_comp_ring);

	/* Memory barrier to prevent the CPU from doing speculative reads of CQE
	 * / BD in the while-loop before reading hw_comp_cons. If the CQE is
	 * read before it is written by FW, then FW writes CQE and SB, and then
	 * the CPU reads the hw_comp_cons, it will use an old CQE.
	 */
	rmb();

	/* Loop to complete all indicated BDs */
	while (sw_comp_cons != hw_comp_cons) {
		struct eth_fast_path_rx_reg_cqe *fp_cqe;
		enum pkt_hash_types rxhash_type;
		enum eth_rx_cqe_type cqe_type;
		struct sw_rx_data *sw_rx_data;
		union eth_rx_cqe *cqe;
		struct sk_buff *skb;
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		struct page *data;
		__le16 flags;
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		u16 len, pad;
		u32 rx_hash;

		/* Get the CQE from the completion ring */
		cqe = (union eth_rx_cqe *)
			qed_chain_consume(&rxq->rx_comp_ring);
		cqe_type = cqe->fast_path_regular.type;

		if (unlikely(cqe_type == ETH_RX_CQE_TYPE_SLOW_PATH)) {
			edev->ops->eth_cqe_completion(
					edev->cdev, fp->rss_id,
					(struct eth_slow_path_rx_cqe *)cqe);
			goto next_cqe;
		}

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		if (cqe_type != ETH_RX_CQE_TYPE_REGULAR) {
			switch (cqe_type) {
			case ETH_RX_CQE_TYPE_TPA_START:
				qede_tpa_start(edev, rxq,
					       &cqe->fast_path_tpa_start);
				goto next_cqe;
			case ETH_RX_CQE_TYPE_TPA_CONT:
				qede_tpa_cont(edev, rxq,
					      &cqe->fast_path_tpa_cont);
				goto next_cqe;
			case ETH_RX_CQE_TYPE_TPA_END:
				qede_tpa_end(edev, fp,
					     &cqe->fast_path_tpa_end);
				goto next_rx_only;
			default:
				break;
			}
		}

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		/* Get the data from the SW ring */
		sw_rx_index = rxq->sw_rx_cons & NUM_RX_BDS_MAX;
		sw_rx_data = &rxq->sw_rx_ring[sw_rx_index];
		data = sw_rx_data->data;

		fp_cqe = &cqe->fast_path_regular;
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		len =  le16_to_cpu(fp_cqe->len_on_first_bd);
1228
		pad = fp_cqe->placement_offset;
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		flags = cqe->fast_path_regular.pars_flags.flags;
1230

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		/* If this is an error packet then drop it */
		parse_flag = le16_to_cpu(flags);
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		csum_flag = qede_check_csum(parse_flag);
		if (unlikely(csum_flag == QEDE_CSUM_ERROR)) {
			DP_NOTICE(edev,
				  "CQE in CONS = %u has error, flags = %x, dropping incoming packet\n",
				  sw_comp_cons, parse_flag);
			rxq->rx_hw_errors++;
			qede_reuse_page(edev, rxq, sw_rx_data);
			goto next_rx;
		}
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		skb = netdev_alloc_skb(edev->ndev, QEDE_RX_HDR_SIZE);
		if (unlikely(!skb)) {
1246
			DP_NOTICE(edev,
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				  "Build_skb failed, dropping incoming packet\n");
			qede_reuse_page(edev, rxq, sw_rx_data);
1249
			rxq->rx_alloc_errors++;
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			goto next_rx;
		}

		/* Copy data into SKB */
		if (len + pad <= QEDE_RX_HDR_SIZE) {
			memcpy(skb_put(skb, len),
			       page_address(data) + pad +
				sw_rx_data->page_offset, len);
			qede_reuse_page(edev, rxq, sw_rx_data);
		} else {
			struct skb_frag_struct *frag;
			unsigned int pull_len;
			unsigned char *va;

			frag = &skb_shinfo(skb)->frags[0];

			skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, data,
					pad + sw_rx_data->page_offset,
					len, rxq->rx_buf_seg_size);

			va = skb_frag_address(frag);
			pull_len = eth_get_headlen(va, QEDE_RX_HDR_SIZE);

			/* Align the pull_len to optimize memcpy */
			memcpy(skb->data, va, ALIGN(pull_len, sizeof(long)));

			skb_frag_size_sub(frag, pull_len);
			frag->page_offset += pull_len;
			skb->data_len -= pull_len;
			skb->tail += pull_len;

			if (unlikely(qede_realloc_rx_buffer(edev, rxq,
							    sw_rx_data))) {
				DP_ERR(edev, "Failed to allocate rx buffer\n");
				rxq->rx_alloc_errors++;
				goto next_cqe;
			}
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		}

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		if (fp_cqe->bd_num != 1) {
			u16 pkt_len = le16_to_cpu(fp_cqe->pkt_len);
			u8 num_frags;

			pkt_len -= len;

			for (num_frags = fp_cqe->bd_num - 1; num_frags > 0;
			     num_frags--) {
				u16 cur_size = pkt_len > rxq->rx_buf_size ?
						rxq->rx_buf_size : pkt_len;

				WARN_ONCE(!cur_size,
					  "Still got %d BDs for mapping jumbo, but length became 0\n",
					  num_frags);

				if (unlikely(qede_alloc_rx_buffer(edev, rxq)))
					goto next_cqe;

				rxq->sw_rx_cons++;
				sw_rx_index = rxq->sw_rx_cons & NUM_RX_BDS_MAX;
				sw_rx_data = &rxq->sw_rx_ring[sw_rx_index];
				qed_chain_consume(&rxq->rx_bd_ring);
				dma_unmap_page(&edev->pdev->dev,
					       sw_rx_data->mapping,
					       PAGE_SIZE, DMA_FROM_DEVICE);

				skb_fill_page_desc(skb,
						   skb_shinfo(skb)->nr_frags++,
						   sw_rx_data->data, 0,
						   cur_size);

				skb->truesize += PAGE_SIZE;
				skb->data_len += cur_size;
				skb->len += cur_size;
				pkt_len -= cur_size;
			}
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			if (pkt_len)
				DP_ERR(edev,
				       "Mapped all BDs of jumbo, but still have %d bytes\n",
				       pkt_len);
		}
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		skb->protocol = eth_type_trans(skb, edev->ndev);

		rx_hash = qede_get_rxhash(edev, fp_cqe->bitfields,
					  fp_cqe->rss_hash,
					  &rxhash_type);

		skb_set_hash(skb, rx_hash, rxhash_type);

		qede_set_skb_csum(skb, csum_flag);

		skb_record_rx_queue(skb, fp->rss_id);

		qede_skb_receive(edev, fp, skb, le16_to_cpu(fp_cqe->vlan_tag));

		qed_chain_consume(&rxq->rx_bd_ring);
next_rx:
		rxq->sw_rx_cons++;
1349
next_rx_only:
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		rx_pkt++;

next_cqe: /* don't consume bd rx buffer */
		qed_chain_recycle_consumed(&rxq->rx_comp_ring);
		sw_comp_cons = qed_chain_get_cons_idx(&rxq->rx_comp_ring);
		/* CR TPA - revisit how to handle budget in TPA perhaps
		 * increase on "end"
		 */
		if (rx_pkt == budget)
			break;
	} /* repeat while sw_comp_cons != hw_comp_cons... */

	/* Update producers */
	qede_update_rx_prod(edev, rxq);

	return rx_pkt;
}

static int qede_poll(struct napi_struct *napi, int budget)
{
	int work_done = 0;
	struct qede_fastpath *fp = container_of(napi, struct qede_fastpath,
						 napi);
	struct qede_dev *edev = fp->edev;

	while (1) {
		u8 tc;

		for (tc = 0; tc < edev->num_tc; tc++)
			if (qede_txq_has_work(&fp->txqs[tc]))
				qede_tx_int(edev, &fp->txqs[tc]);

		if (qede_has_rx_work(fp->rxq)) {
			work_done += qede_rx_int(fp, budget - work_done);

			/* must not complete if we consumed full budget */
			if (work_done >= budget)
				break;
		}

		/* Fall out from the NAPI loop if needed */
		if (!(qede_has_rx_work(fp->rxq) || qede_has_tx_work(fp))) {
			qed_sb_update_sb_idx(fp->sb_info);
			/* *_has_*_work() reads the status block,
			 * thus we need to ensure that status block indices
			 * have been actually read (qed_sb_update_sb_idx)
			 * prior to this check (*_has_*_work) so that
			 * we won't write the "newer" value of the status block
			 * to HW (if there was a DMA right after
			 * qede_has_rx_work and if there is no rmb, the memory
			 * reading (qed_sb_update_sb_idx) may be postponed
			 * to right before *_ack_sb). In this case there
			 * will never be another interrupt until there is
			 * another update of the status block, while there
			 * is still unhandled work.
			 */
			rmb();

			if (!(qede_has_rx_work(fp->rxq) ||
			      qede_has_tx_work(fp))) {
				napi_complete(napi);
				/* Update and reenable interrupts */
				qed_sb_ack(fp->sb_info, IGU_INT_ENABLE,
					   1 /*update*/);
				break;
			}
		}
	}

	return work_done;
}

static irqreturn_t qede_msix_fp_int(int irq, void *fp_cookie)
{
	struct qede_fastpath *fp = fp_cookie;

	qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0 /*do not update*/);

	napi_schedule_irqoff(&fp->napi);
	return IRQ_HANDLED;
}

/* -------------------------------------------------------------------------
 * END OF FAST-PATH
 * -------------------------------------------------------------------------
 */

static int qede_open(struct net_device *ndev);
static int qede_close(struct net_device *ndev);
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static int qede_set_mac_addr(struct net_device *ndev, void *p);
static void qede_set_rx_mode(struct net_device *ndev);
static void qede_config_rx_mode(struct net_device *ndev);

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);
}

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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);
}

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void qede_fill_by_demand_stats(struct qede_dev *edev)
{
	struct qed_eth_stats stats;

	edev->ops->get_vport_stats(edev->cdev, &stats);
	edev->stats.no_buff_discards = stats.no_buff_discards;
	edev->stats.rx_ucast_bytes = stats.rx_ucast_bytes;
	edev->stats.rx_mcast_bytes = stats.rx_mcast_bytes;
	edev->stats.rx_bcast_bytes = stats.rx_bcast_bytes;
	edev->stats.rx_ucast_pkts = stats.rx_ucast_pkts;
	edev->stats.rx_mcast_pkts = stats.rx_mcast_pkts;
	edev->stats.rx_bcast_pkts = stats.rx_bcast_pkts;
	edev->stats.mftag_filter_discards = stats.mftag_filter_discards;
	edev->stats.mac_filter_discards = stats.mac_filter_discards;

	edev->stats.tx_ucast_bytes = stats.tx_ucast_bytes;
	edev->stats.tx_mcast_bytes = stats.tx_mcast_bytes;
	edev->stats.tx_bcast_bytes = stats.tx_bcast_bytes;
	edev->stats.tx_ucast_pkts = stats.tx_ucast_pkts;
	edev->stats.tx_mcast_pkts = stats.tx_mcast_pkts;
	edev->stats.tx_bcast_pkts = stats.tx_bcast_pkts;
	edev->stats.tx_err_drop_pkts = stats.tx_err_drop_pkts;
	edev->stats.coalesced_pkts = stats.tpa_coalesced_pkts;
	edev->stats.coalesced_events = stats.tpa_coalesced_events;
	edev->stats.coalesced_aborts_num = stats.tpa_aborts_num;
	edev->stats.non_coalesced_pkts = stats.tpa_not_coalesced_pkts;
	edev->stats.coalesced_bytes = stats.tpa_coalesced_bytes;

	edev->stats.rx_64_byte_packets = stats.rx_64_byte_packets;
	edev->stats.rx_127_byte_packets = stats.rx_127_byte_packets;
	edev->stats.rx_255_byte_packets = stats.rx_255_byte_packets;
	edev->stats.rx_511_byte_packets = stats.rx_511_byte_packets;
	edev->stats.rx_1023_byte_packets = stats.rx_1023_byte_packets;
	edev->stats.rx_1518_byte_packets = stats.rx_1518_byte_packets;
	edev->stats.rx_1522_byte_packets = stats.rx_1522_byte_packets;
	edev->stats.rx_2047_byte_packets = stats.rx_2047_byte_packets;
	edev->stats.rx_4095_byte_packets = stats.rx_4095_byte_packets;
	edev->stats.rx_9216_byte_packets = stats.rx_9216_byte_packets;
	edev->stats.rx_16383_byte_packets = stats.rx_16383_byte_packets;
	edev->stats.rx_crc_errors = stats.rx_crc_errors;
	edev->stats.rx_mac_crtl_frames = stats.rx_mac_crtl_frames;
	edev->stats.rx_pause_frames = stats.rx_pause_frames;
	edev->stats.rx_pfc_frames = stats.rx_pfc_frames;
	edev->stats.rx_align_errors = stats.rx_align_errors;
	edev->stats.rx_carrier_errors = stats.rx_carrier_errors;
	edev->stats.rx_oversize_packets = stats.rx_oversize_packets;
	edev->stats.rx_jabbers = stats.rx_jabbers;
	edev->stats.rx_undersize_packets = stats.rx_undersize_packets;
	edev->stats.rx_fragments = stats.rx_fragments;
	edev->stats.tx_64_byte_packets = stats.tx_64_byte_packets;
	edev->stats.tx_65_to_127_byte_packets = stats.tx_65_to_127_byte_packets;
	edev->stats.tx_128_to_255_byte_packets =
				stats.tx_128_to_255_byte_packets;
	edev->stats.tx_256_to_511_byte_packets =
				stats.tx_256_to_511_byte_packets;
	edev->stats.tx_512_to_1023_byte_packets =
				stats.tx_512_to_1023_byte_packets;
	edev->stats.tx_1024_to_1518_byte_packets =
				stats.tx_1024_to_1518_byte_packets;
	edev->stats.tx_1519_to_2047_byte_packets =
				stats.tx_1519_to_2047_byte_packets;
	edev->stats.tx_2048_to_4095_byte_packets =
				stats.tx_2048_to_4095_byte_packets;
	edev->stats.tx_4096_to_9216_byte_packets =
				stats.tx_4096_to_9216_byte_packets;
	edev->stats.tx_9217_to_16383_byte_packets =
				stats.tx_9217_to_16383_byte_packets;
	edev->stats.tx_pause_frames = stats.tx_pause_frames;
	edev->stats.tx_pfc_frames = stats.tx_pfc_frames;
	edev->stats.tx_lpi_entry_count = stats.tx_lpi_entry_count;
	edev->stats.tx_total_collisions = stats.tx_total_collisions;
	edev->stats.brb_truncates = stats.brb_truncates;
	edev->stats.brb_discards = stats.brb_discards;
	edev->stats.tx_mac_ctrl_frames = stats.tx_mac_ctrl_frames;
}

static struct rtnl_link_stats64 *qede_get_stats64(
			    struct net_device *dev,
			    struct rtnl_link_stats64 *stats)
{
	struct qede_dev *edev = netdev_priv(dev);

	qede_fill_by_demand_stats(edev);

	stats->rx_packets = edev->stats.rx_ucast_pkts +
			    edev->stats.rx_mcast_pkts +
			    edev->stats.rx_bcast_pkts;
	stats->tx_packets = edev->stats.tx_ucast_pkts +
			    edev->stats.tx_mcast_pkts +
			    edev->stats.tx_bcast_pkts;

	stats->rx_bytes = edev->stats.rx_ucast_bytes +
			  edev->stats.rx_mcast_bytes +
			  edev->stats.rx_bcast_bytes;

	stats->tx_bytes = edev->stats.tx_ucast_bytes +
			  edev->stats.tx_mcast_bytes +
			  edev->stats.tx_bcast_bytes;

	stats->tx_errors = edev->stats.tx_err_drop_pkts;
	stats->multicast = edev->stats.rx_mcast_pkts +
			   edev->stats.rx_bcast_pkts;

	stats->rx_fifo_errors = edev->stats.no_buff_discards;

	stats->collisions = edev->stats.tx_total_collisions;
	stats->rx_crc_errors = edev->stats.rx_crc_errors;
	stats->rx_frame_errors = edev->stats.rx_align_errors;

	return stats;
}

1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825
static void 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;

	memset(&params, 0, sizeof(params));

	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;
	}
}

static 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;

	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 */
	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);

		return 0;
	}

	/* 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);
			return -EINVAL;
		}
		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)
			qede_config_accept_any_vlan(edev, true);

		edev->non_configured_vlans++;
	}

	list_add(&vlan->list, &edev->vlan_list);

	return 0;
}

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);
}

static 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)
		qede_config_accept_any_vlan(edev, true);
	else if (!edev->non_configured_vlans)
		qede_config_accept_any_vlan(edev, false);

	return real_rc;
}

static 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;

	DP_VERBOSE(edev, NETIF_MSG_IFDOWN, "Removing vlan 0x%04x\n", vid);

	/* Find whether entry exists */
	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");
		return 0;
	}

	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);
		return 0;
	}

	/* Remove vlan */
	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);
		return -EINVAL;
	}

	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);

	return rc;
}

static 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;
}

1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861
#ifdef CONFIG_QEDE_VXLAN
static void qede_add_vxlan_port(struct net_device *dev,
				sa_family_t sa_family, __be16 port)
{
	struct qede_dev *edev = netdev_priv(dev);
	u16 t_port = ntohs(port);

	if (edev->vxlan_dst_port)
		return;

	edev->vxlan_dst_port = t_port;

	DP_VERBOSE(edev, QED_MSG_DEBUG, "Added vxlan port=%d", t_port);

	set_bit(QEDE_SP_VXLAN_PORT_CONFIG, &edev->sp_flags);
	schedule_delayed_work(&edev->sp_task, 0);
}

static void qede_del_vxlan_port(struct net_device *dev,
				sa_family_t sa_family, __be16 port)
{
	struct qede_dev *edev = netdev_priv(dev);
	u16 t_port = ntohs(port);

	if (t_port != edev->vxlan_dst_port)
		return;

	edev->vxlan_dst_port = 0;

	DP_VERBOSE(edev, QED_MSG_DEBUG, "Deleted vxlan port=%d", t_port);

	set_bit(QEDE_SP_VXLAN_PORT_CONFIG, &edev->sp_flags);
	schedule_delayed_work(&edev->sp_task, 0);
}
#endif

1862 1863 1864 1865
static const struct net_device_ops qede_netdev_ops = {
	.ndo_open = qede_open,
	.ndo_stop = qede_close,
	.ndo_start_xmit = qede_start_xmit,
1866 1867
	.ndo_set_rx_mode = qede_set_rx_mode,
	.ndo_set_mac_address = qede_set_mac_addr,
1868
	.ndo_validate_addr = eth_validate_addr,
1869
	.ndo_change_mtu = qede_change_mtu,
1870 1871
	.ndo_vlan_rx_add_vid = qede_vlan_rx_add_vid,
	.ndo_vlan_rx_kill_vid = qede_vlan_rx_kill_vid,
1872
	.ndo_get_stats64 = qede_get_stats64,
1873 1874 1875 1876
#ifdef CONFIG_QEDE_VXLAN
	.ndo_add_vxlan_port = qede_add_vxlan_port,
	.ndo_del_vxlan_port = qede_del_vxlan_port,
#endif
1877 1878
};

Y
Yuval Mintz 已提交
1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907
/* -------------------------------------------------------------------------
 * START OF PROBE / REMOVE
 * -------------------------------------------------------------------------
 */

static struct qede_dev *qede_alloc_etherdev(struct qed_dev *cdev,
					    struct pci_dev *pdev,
					    struct qed_dev_eth_info *info,
					    u32 dp_module,
					    u8 dp_level)
{
	struct net_device *ndev;
	struct qede_dev *edev;

	ndev = alloc_etherdev_mqs(sizeof(*edev),
				  info->num_queues,
				  info->num_queues);
	if (!ndev) {
		pr_err("etherdev allocation failed\n");
		return NULL;
	}

	edev = netdev_priv(ndev);
	edev->ndev = ndev;
	edev->cdev = cdev;
	edev->pdev = pdev;
	edev->dp_module = dp_module;
	edev->dp_level = dp_level;
	edev->ops = qed_ops;
1908 1909
	edev->q_num_rx_buffers = NUM_RX_BDS_DEF;
	edev->q_num_tx_buffers = NUM_TX_BDS_DEF;
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Yuval Mintz 已提交
1910 1911 1912 1913 1914

	DP_INFO(edev, "Allocated netdev with 64 tx queues and 64 rx queues\n");

	SET_NETDEV_DEV(ndev, &pdev->dev);

1915
	memset(&edev->stats, 0, sizeof(edev->stats));
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Yuval Mintz 已提交
1916 1917 1918 1919
	memcpy(&edev->dev_info, info, sizeof(*info));

	edev->num_tc = edev->dev_info.num_tc;

1920 1921
	INIT_LIST_HEAD(&edev->vlan_list);

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Yuval Mintz 已提交
1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939
	return edev;
}

static void qede_init_ndev(struct qede_dev *edev)
{
	struct net_device *ndev = edev->ndev;
	struct pci_dev *pdev = edev->pdev;
	u32 hw_features;

	pci_set_drvdata(pdev, ndev);

	ndev->mem_start = edev->dev_info.common.pci_mem_start;
	ndev->base_addr = ndev->mem_start;
	ndev->mem_end = edev->dev_info.common.pci_mem_end;
	ndev->irq = edev->dev_info.common.pci_irq;

	ndev->watchdog_timeo = TX_TIMEOUT;

1940 1941
	ndev->netdev_ops = &qede_netdev_ops;

1942 1943
	qede_set_ethtool_ops(ndev);

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1944 1945 1946 1947 1948 1949 1950 1951 1952
	/* user-changeble features */
	hw_features = NETIF_F_GRO | NETIF_F_SG |
		      NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
		      NETIF_F_TSO | NETIF_F_TSO6;

	ndev->vlan_features = hw_features | NETIF_F_RXHASH | NETIF_F_RXCSUM |
			      NETIF_F_HIGHDMA;
	ndev->features = hw_features | NETIF_F_RXHASH | NETIF_F_RXCSUM |
			 NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HIGHDMA |
1953
			 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_CTAG_TX;
Y
Yuval Mintz 已提交
1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971

	ndev->hw_features = hw_features;

	/* Set network device HW mac */
	ether_addr_copy(edev->ndev->dev_addr, edev->dev_info.common.hw_mac);
}

/* This function converts from 32b param to two params of level and module
 * Input 32b decoding:
 * b31 - enable all NOTICE prints. NOTICE prints are for deviation from the
 * 'happy' flow, e.g. memory allocation failed.
 * b30 - enable all INFO prints. INFO prints are for major steps in the flow
 * and provide important parameters.
 * b29-b0 - per-module bitmap, where each bit enables VERBOSE prints of that
 * module. VERBOSE prints are for tracking the specific flow in low level.
 *
 * Notice that the level should be that of the lowest required logs.
 */
1972
void qede_config_debug(uint debug, u32 *p_dp_module, u8 *p_dp_level)
Y
Yuval Mintz 已提交
1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986
{
	*p_dp_level = QED_LEVEL_NOTICE;
	*p_dp_module = 0;

	if (debug & QED_LOG_VERBOSE_MASK) {
		*p_dp_level = QED_LEVEL_VERBOSE;
		*p_dp_module = (debug & 0x3FFFFFFF);
	} else if (debug & QED_LOG_INFO_MASK) {
		*p_dp_level = QED_LEVEL_INFO;
	} else if (debug & QED_LOG_NOTICE_MASK) {
		*p_dp_level = QED_LEVEL_NOTICE;
	}
}

1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044
static void qede_free_fp_array(struct qede_dev *edev)
{
	if (edev->fp_array) {
		struct qede_fastpath *fp;
		int i;

		for_each_rss(i) {
			fp = &edev->fp_array[i];

			kfree(fp->sb_info);
			kfree(fp->rxq);
			kfree(fp->txqs);
		}
		kfree(edev->fp_array);
	}
	edev->num_rss = 0;
}

static int qede_alloc_fp_array(struct qede_dev *edev)
{
	struct qede_fastpath *fp;
	int i;

	edev->fp_array = kcalloc(QEDE_RSS_CNT(edev),
				 sizeof(*edev->fp_array), GFP_KERNEL);
	if (!edev->fp_array) {
		DP_NOTICE(edev, "fp array allocation failed\n");
		goto err;
	}

	for_each_rss(i) {
		fp = &edev->fp_array[i];

		fp->sb_info = kcalloc(1, sizeof(*fp->sb_info), GFP_KERNEL);
		if (!fp->sb_info) {
			DP_NOTICE(edev, "sb info struct allocation failed\n");
			goto err;
		}

		fp->rxq = kcalloc(1, sizeof(*fp->rxq), GFP_KERNEL);
		if (!fp->rxq) {
			DP_NOTICE(edev, "RXQ struct allocation failed\n");
			goto err;
		}

		fp->txqs = kcalloc(edev->num_tc, sizeof(*fp->txqs), GFP_KERNEL);
		if (!fp->txqs) {
			DP_NOTICE(edev, "TXQ array allocation failed\n");
			goto err;
		}
	}

	return 0;
err:
	qede_free_fp_array(edev);
	return -ENOMEM;
}

2045 2046 2047 2048
static void qede_sp_task(struct work_struct *work)
{
	struct qede_dev *edev = container_of(work, struct qede_dev,
					     sp_task.work);
2049 2050
	struct qed_dev *cdev = edev->cdev;

2051 2052 2053 2054 2055 2056 2057
	mutex_lock(&edev->qede_lock);

	if (edev->state == QEDE_STATE_OPEN) {
		if (test_and_clear_bit(QEDE_SP_RX_MODE, &edev->sp_flags))
			qede_config_rx_mode(edev->ndev);
	}

2058 2059 2060 2061 2062 2063 2064 2065 2066
	if (test_and_clear_bit(QEDE_SP_VXLAN_PORT_CONFIG, &edev->sp_flags)) {
		struct qed_tunn_params tunn_params;

		memset(&tunn_params, 0, sizeof(tunn_params));
		tunn_params.update_vxlan_port = 1;
		tunn_params.vxlan_port = edev->vxlan_dst_port;
		qed_ops->tunn_config(cdev, &tunn_params);
	}

2067 2068 2069
	mutex_unlock(&edev->qede_lock);
}

Y
Yuval Mintz 已提交
2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132
static void qede_update_pf_params(struct qed_dev *cdev)
{
	struct qed_pf_params pf_params;

	/* 16 rx + 16 tx */
	memset(&pf_params, 0, sizeof(struct qed_pf_params));
	pf_params.eth_pf_params.num_cons = 32;
	qed_ops->common->update_pf_params(cdev, &pf_params);
}

enum qede_probe_mode {
	QEDE_PROBE_NORMAL,
};

static int __qede_probe(struct pci_dev *pdev, u32 dp_module, u8 dp_level,
			enum qede_probe_mode mode)
{
	struct qed_slowpath_params params;
	struct qed_dev_eth_info dev_info;
	struct qede_dev *edev;
	struct qed_dev *cdev;
	int rc;

	if (unlikely(dp_level & QED_LEVEL_INFO))
		pr_notice("Starting qede probe\n");

	cdev = qed_ops->common->probe(pdev, QED_PROTOCOL_ETH,
				      dp_module, dp_level);
	if (!cdev) {
		rc = -ENODEV;
		goto err0;
	}

	qede_update_pf_params(cdev);

	/* Start the Slowpath-process */
	memset(&params, 0, sizeof(struct qed_slowpath_params));
	params.int_mode = QED_INT_MODE_MSIX;
	params.drv_major = QEDE_MAJOR_VERSION;
	params.drv_minor = QEDE_MINOR_VERSION;
	params.drv_rev = QEDE_REVISION_VERSION;
	params.drv_eng = QEDE_ENGINEERING_VERSION;
	strlcpy(params.name, "qede LAN", QED_DRV_VER_STR_SIZE);
	rc = qed_ops->common->slowpath_start(cdev, &params);
	if (rc) {
		pr_notice("Cannot start slowpath\n");
		goto err1;
	}

	/* Learn information crucial for qede to progress */
	rc = qed_ops->fill_dev_info(cdev, &dev_info);
	if (rc)
		goto err2;

	edev = qede_alloc_etherdev(cdev, pdev, &dev_info, dp_module,
				   dp_level);
	if (!edev) {
		rc = -ENOMEM;
		goto err2;
	}

	qede_init_ndev(edev);

2133 2134 2135 2136 2137 2138
	rc = register_netdev(edev->ndev);
	if (rc) {
		DP_NOTICE(edev, "Cannot register net-device\n");
		goto err3;
	}

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Yuval Mintz 已提交
2139 2140
	edev->ops->common->set_id(cdev, edev->ndev->name, DRV_MODULE_VERSION);

S
Sudarsana Kalluru 已提交
2141 2142
	edev->ops->register_ops(cdev, &qede_ll_ops, edev);

2143 2144 2145
	INIT_DELAYED_WORK(&edev->sp_task, qede_sp_task);
	mutex_init(&edev->qede_lock);

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Yuval Mintz 已提交
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	DP_INFO(edev, "Ending successfully qede probe\n");

	return 0;

2150 2151
err3:
	free_netdev(edev->ndev);
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Yuval Mintz 已提交
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err2:
	qed_ops->common->slowpath_stop(cdev);
err1:
	qed_ops->common->remove(cdev);
err0:
	return rc;
}

static int qede_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
	u32 dp_module = 0;
	u8 dp_level = 0;

	qede_config_debug(debug, &dp_module, &dp_level);

	return __qede_probe(pdev, dp_module, dp_level,
			    QEDE_PROBE_NORMAL);
}

enum qede_remove_mode {
	QEDE_REMOVE_NORMAL,
};

static void __qede_remove(struct pci_dev *pdev, enum qede_remove_mode mode)
{
	struct net_device *ndev = pci_get_drvdata(pdev);
	struct qede_dev *edev = netdev_priv(ndev);
	struct qed_dev *cdev = edev->cdev;

	DP_INFO(edev, "Starting qede_remove\n");

2183
	cancel_delayed_work_sync(&edev->sp_task);
2184 2185
	unregister_netdev(ndev);

Y
Yuval Mintz 已提交
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	edev->ops->common->set_power_state(cdev, PCI_D0);

	pci_set_drvdata(pdev, NULL);

	free_netdev(ndev);

	/* Use global ops since we've freed edev */
	qed_ops->common->slowpath_stop(cdev);
	qed_ops->common->remove(cdev);

	pr_notice("Ending successfully qede_remove\n");
}

static void qede_remove(struct pci_dev *pdev)
{
	__qede_remove(pdev, QEDE_REMOVE_NORMAL);
}
2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214

/* -------------------------------------------------------------------------
 * START OF LOAD / UNLOAD
 * -------------------------------------------------------------------------
 */

static int qede_set_num_queues(struct qede_dev *edev)
{
	int rc;
	u16 rss_num;

	/* Setup queues according to possible resources*/
2215 2216 2217 2218 2219
	if (edev->req_rss)
		rss_num = edev->req_rss;
	else
		rss_num = netif_get_num_default_rss_queues() *
			  edev->dev_info.common.num_hwfns;
2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278

	rss_num = min_t(u16, QEDE_MAX_RSS_CNT(edev), rss_num);

	rc = edev->ops->common->set_fp_int(edev->cdev, rss_num);
	if (rc > 0) {
		/* Managed to request interrupts for our queues */
		edev->num_rss = rc;
		DP_INFO(edev, "Managed %d [of %d] RSS queues\n",
			QEDE_RSS_CNT(edev), rss_num);
		rc = 0;
	}
	return rc;
}

static void qede_free_mem_sb(struct qede_dev *edev,
			     struct qed_sb_info *sb_info)
{
	if (sb_info->sb_virt)
		dma_free_coherent(&edev->pdev->dev, sizeof(*sb_info->sb_virt),
				  (void *)sb_info->sb_virt, sb_info->sb_phys);
}

/* This function allocates fast-path status block memory */
static int qede_alloc_mem_sb(struct qede_dev *edev,
			     struct qed_sb_info *sb_info,
			     u16 sb_id)
{
	struct status_block *sb_virt;
	dma_addr_t sb_phys;
	int rc;

	sb_virt = dma_alloc_coherent(&edev->pdev->dev,
				     sizeof(*sb_virt),
				     &sb_phys, GFP_KERNEL);
	if (!sb_virt) {
		DP_ERR(edev, "Status block allocation failed\n");
		return -ENOMEM;
	}

	rc = edev->ops->common->sb_init(edev->cdev, sb_info,
					sb_virt, sb_phys, sb_id,
					QED_SB_TYPE_L2_QUEUE);
	if (rc) {
		DP_ERR(edev, "Status block initialization failed\n");
		dma_free_coherent(&edev->pdev->dev, sizeof(*sb_virt),
				  sb_virt, sb_phys);
		return rc;
	}

	return 0;
}

static void qede_free_rx_buffers(struct qede_dev *edev,
				 struct qede_rx_queue *rxq)
{
	u16 i;

	for (i = rxq->sw_rx_cons; i != rxq->sw_rx_prod; i++) {
		struct sw_rx_data *rx_buf;
Y
Yuval Mintz 已提交
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		struct page *data;
2280 2281 2282 2283

		rx_buf = &rxq->sw_rx_ring[i & NUM_RX_BDS_MAX];
		data = rx_buf->data;

Y
Yuval Mintz 已提交
2284 2285 2286
		dma_unmap_page(&edev->pdev->dev,
			       rx_buf->mapping,
			       PAGE_SIZE, DMA_FROM_DEVICE);
2287 2288

		rx_buf->data = NULL;
Y
Yuval Mintz 已提交
2289
		__free_page(data);
2290 2291 2292
	}
}

2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312
static void qede_free_sge_mem(struct qede_dev *edev,
			      struct qede_rx_queue *rxq) {
	int i;

	if (edev->gro_disable)
		return;

	for (i = 0; i < ETH_TPA_MAX_AGGS_NUM; i++) {
		struct qede_agg_info *tpa_info = &rxq->tpa_info[i];
		struct sw_rx_data *replace_buf = &tpa_info->replace_buf;

		if (replace_buf) {
			dma_unmap_page(&edev->pdev->dev,
				       dma_unmap_addr(replace_buf, mapping),
				       PAGE_SIZE, DMA_FROM_DEVICE);
			__free_page(replace_buf->data);
		}
	}
}

2313 2314 2315
static void qede_free_mem_rxq(struct qede_dev *edev,
			      struct qede_rx_queue *rxq)
{
2316 2317
	qede_free_sge_mem(edev, rxq);

2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334
	/* Free rx buffers */
	qede_free_rx_buffers(edev, rxq);

	/* Free the parallel SW ring */
	kfree(rxq->sw_rx_ring);

	/* Free the real RQ ring used by FW */
	edev->ops->common->chain_free(edev->cdev, &rxq->rx_bd_ring);
	edev->ops->common->chain_free(edev->cdev, &rxq->rx_comp_ring);
}

static int qede_alloc_rx_buffer(struct qede_dev *edev,
				struct qede_rx_queue *rxq)
{
	struct sw_rx_data *sw_rx_data;
	struct eth_rx_bd *rx_bd;
	dma_addr_t mapping;
Y
Yuval Mintz 已提交
2335
	struct page *data;
2336 2337 2338 2339
	u16 rx_buf_size;

	rx_buf_size = rxq->rx_buf_size;

Y
Yuval Mintz 已提交
2340
	data = alloc_pages(GFP_ATOMIC, 0);
2341
	if (unlikely(!data)) {
Y
Yuval Mintz 已提交
2342
		DP_NOTICE(edev, "Failed to allocate Rx data [page]\n");
2343 2344 2345
		return -ENOMEM;
	}

Y
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2346 2347 2348 2349 2350
	/* Map the entire page as it would be used
	 * for multiple RX buffer segment size mapping.
	 */
	mapping = dma_map_page(&edev->pdev->dev, data, 0,
			       PAGE_SIZE, DMA_FROM_DEVICE);
2351
	if (unlikely(dma_mapping_error(&edev->pdev->dev, mapping))) {
Y
Yuval Mintz 已提交
2352
		__free_page(data);
2353 2354 2355 2356 2357
		DP_NOTICE(edev, "Failed to map Rx buffer\n");
		return -ENOMEM;
	}

	sw_rx_data = &rxq->sw_rx_ring[rxq->sw_rx_prod & NUM_RX_BDS_MAX];
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2358
	sw_rx_data->page_offset = 0;
2359
	sw_rx_data->data = data;
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	sw_rx_data->mapping = mapping;
2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372

	/* Advance PROD and get BD pointer */
	rx_bd = (struct eth_rx_bd *)qed_chain_produce(&rxq->rx_bd_ring);
	WARN_ON(!rx_bd);
	rx_bd->addr.hi = cpu_to_le32(upper_32_bits(mapping));
	rx_bd->addr.lo = cpu_to_le32(lower_32_bits(mapping));

	rxq->sw_rx_prod++;

	return 0;
}

2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419
static int qede_alloc_sge_mem(struct qede_dev *edev,
			      struct qede_rx_queue *rxq)
{
	dma_addr_t mapping;
	int i;

	if (edev->gro_disable)
		return 0;

	if (edev->ndev->mtu > PAGE_SIZE) {
		edev->gro_disable = 1;
		return 0;
	}

	for (i = 0; i < ETH_TPA_MAX_AGGS_NUM; i++) {
		struct qede_agg_info *tpa_info = &rxq->tpa_info[i];
		struct sw_rx_data *replace_buf = &tpa_info->replace_buf;

		replace_buf->data = alloc_pages(GFP_ATOMIC, 0);
		if (unlikely(!replace_buf->data)) {
			DP_NOTICE(edev,
				  "Failed to allocate TPA skb pool [replacement buffer]\n");
			goto err;
		}

		mapping = dma_map_page(&edev->pdev->dev, replace_buf->data, 0,
				       rxq->rx_buf_size, DMA_FROM_DEVICE);
		if (unlikely(dma_mapping_error(&edev->pdev->dev, mapping))) {
			DP_NOTICE(edev,
				  "Failed to map TPA replacement buffer\n");
			goto err;
		}

		dma_unmap_addr_set(replace_buf, mapping, mapping);
		tpa_info->replace_buf.page_offset = 0;

		tpa_info->replace_buf_mapping = mapping;
		tpa_info->agg_state = QEDE_AGG_STATE_NONE;
	}

	return 0;
err:
	qede_free_sge_mem(edev, rxq);
	edev->gro_disable = 1;
	return -ENOMEM;
}

2420 2421 2422 2423 2424 2425 2426 2427
/* This function allocates all memory needed per Rx queue */
static int qede_alloc_mem_rxq(struct qede_dev *edev,
			      struct qede_rx_queue *rxq)
{
	int i, rc, size, num_allocated;

	rxq->num_rx_buffers = edev->q_num_rx_buffers;

Y
Yuval Mintz 已提交
2428 2429 2430 2431 2432 2433 2434
	rxq->rx_buf_size = NET_IP_ALIGN + ETH_OVERHEAD +
			   edev->ndev->mtu;
	if (rxq->rx_buf_size > PAGE_SIZE)
		rxq->rx_buf_size = PAGE_SIZE;

	/* Segment size to spilt a page in multiple equal parts */
	rxq->rx_buf_seg_size = roundup_pow_of_two(rxq->rx_buf_size);
2435 2436

	/* Allocate the parallel driver ring for Rx buffers */
Y
Yuval Mintz 已提交
2437
	size = sizeof(*rxq->sw_rx_ring) * RX_RING_SIZE;
2438 2439 2440 2441 2442 2443 2444 2445 2446 2447
	rxq->sw_rx_ring = kzalloc(size, GFP_KERNEL);
	if (!rxq->sw_rx_ring) {
		DP_ERR(edev, "Rx buffers ring allocation failed\n");
		goto err;
	}

	/* Allocate FW Rx ring  */
	rc = edev->ops->common->chain_alloc(edev->cdev,
					    QED_CHAIN_USE_TO_CONSUME_PRODUCE,
					    QED_CHAIN_MODE_NEXT_PTR,
Y
Yuval Mintz 已提交
2448
					    RX_RING_SIZE,
2449 2450 2451 2452 2453 2454 2455 2456 2457 2458
					    sizeof(struct eth_rx_bd),
					    &rxq->rx_bd_ring);

	if (rc)
		goto err;

	/* Allocate FW completion ring */
	rc = edev->ops->common->chain_alloc(edev->cdev,
					    QED_CHAIN_USE_TO_CONSUME,
					    QED_CHAIN_MODE_PBL,
Y
Yuval Mintz 已提交
2459
					    RX_RING_SIZE,
2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480
					    sizeof(union eth_rx_cqe),
					    &rxq->rx_comp_ring);
	if (rc)
		goto err;

	/* Allocate buffers for the Rx ring */
	for (i = 0; i < rxq->num_rx_buffers; i++) {
		rc = qede_alloc_rx_buffer(edev, rxq);
		if (rc)
			break;
	}
	num_allocated = i;
	if (!num_allocated) {
		DP_ERR(edev, "Rx buffers allocation failed\n");
		goto err;
	} else if (num_allocated < rxq->num_rx_buffers) {
		DP_NOTICE(edev,
			  "Allocated less buffers than desired (%d allocated)\n",
			  num_allocated);
	}

2481 2482
	qede_alloc_sge_mem(edev, rxq);

2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644
	return 0;

err:
	qede_free_mem_rxq(edev, rxq);
	return -ENOMEM;
}

static void qede_free_mem_txq(struct qede_dev *edev,
			      struct qede_tx_queue *txq)
{
	/* Free the parallel SW ring */
	kfree(txq->sw_tx_ring);

	/* Free the real RQ ring used by FW */
	edev->ops->common->chain_free(edev->cdev, &txq->tx_pbl);
}

/* This function allocates all memory needed per Tx queue */
static int qede_alloc_mem_txq(struct qede_dev *edev,
			      struct qede_tx_queue *txq)
{
	int size, rc;
	union eth_tx_bd_types *p_virt;

	txq->num_tx_buffers = edev->q_num_tx_buffers;

	/* Allocate the parallel driver ring for Tx buffers */
	size = sizeof(*txq->sw_tx_ring) * NUM_TX_BDS_MAX;
	txq->sw_tx_ring = kzalloc(size, GFP_KERNEL);
	if (!txq->sw_tx_ring) {
		DP_NOTICE(edev, "Tx buffers ring allocation failed\n");
		goto err;
	}

	rc = edev->ops->common->chain_alloc(edev->cdev,
					    QED_CHAIN_USE_TO_CONSUME_PRODUCE,
					    QED_CHAIN_MODE_PBL,
					    NUM_TX_BDS_MAX,
					    sizeof(*p_virt),
					    &txq->tx_pbl);
	if (rc)
		goto err;

	return 0;

err:
	qede_free_mem_txq(edev, txq);
	return -ENOMEM;
}

/* This function frees all memory of a single fp */
static void qede_free_mem_fp(struct qede_dev *edev,
			     struct qede_fastpath *fp)
{
	int tc;

	qede_free_mem_sb(edev, fp->sb_info);

	qede_free_mem_rxq(edev, fp->rxq);

	for (tc = 0; tc < edev->num_tc; tc++)
		qede_free_mem_txq(edev, &fp->txqs[tc]);
}

/* This function allocates all memory needed for a single fp (i.e. an entity
 * which contains status block, one rx queue and multiple per-TC tx queues.
 */
static int qede_alloc_mem_fp(struct qede_dev *edev,
			     struct qede_fastpath *fp)
{
	int rc, tc;

	rc = qede_alloc_mem_sb(edev, fp->sb_info, fp->rss_id);
	if (rc)
		goto err;

	rc = qede_alloc_mem_rxq(edev, fp->rxq);
	if (rc)
		goto err;

	for (tc = 0; tc < edev->num_tc; tc++) {
		rc = qede_alloc_mem_txq(edev, &fp->txqs[tc]);
		if (rc)
			goto err;
	}

	return 0;

err:
	qede_free_mem_fp(edev, fp);
	return -ENOMEM;
}

static void qede_free_mem_load(struct qede_dev *edev)
{
	int i;

	for_each_rss(i) {
		struct qede_fastpath *fp = &edev->fp_array[i];

		qede_free_mem_fp(edev, fp);
	}
}

/* This function allocates all qede memory at NIC load. */
static int qede_alloc_mem_load(struct qede_dev *edev)
{
	int rc = 0, rss_id;

	for (rss_id = 0; rss_id < QEDE_RSS_CNT(edev); rss_id++) {
		struct qede_fastpath *fp = &edev->fp_array[rss_id];

		rc = qede_alloc_mem_fp(edev, fp);
		if (rc)
			break;
	}

	if (rss_id != QEDE_RSS_CNT(edev)) {
		/* Failed allocating memory for all the queues */
		if (!rss_id) {
			DP_ERR(edev,
			       "Failed to allocate memory for the leading queue\n");
			rc = -ENOMEM;
		} else {
			DP_NOTICE(edev,
				  "Failed to allocate memory for all of RSS queues\n Desired: %d queues, allocated: %d queues\n",
				  QEDE_RSS_CNT(edev), rss_id);
		}
		edev->num_rss = rss_id;
	}

	return 0;
}

/* This function inits fp content and resets the SB, RXQ and TXQ structures */
static void qede_init_fp(struct qede_dev *edev)
{
	int rss_id, txq_index, tc;
	struct qede_fastpath *fp;

	for_each_rss(rss_id) {
		fp = &edev->fp_array[rss_id];

		fp->edev = edev;
		fp->rss_id = rss_id;

		memset((void *)&fp->napi, 0, sizeof(fp->napi));

		memset((void *)fp->sb_info, 0, sizeof(*fp->sb_info));

		memset((void *)fp->rxq, 0, sizeof(*fp->rxq));
		fp->rxq->rxq_id = rss_id;

		memset((void *)fp->txqs, 0, (edev->num_tc * sizeof(*fp->txqs)));
		for (tc = 0; tc < edev->num_tc; tc++) {
			txq_index = tc * QEDE_RSS_CNT(edev) + rss_id;
			fp->txqs[tc].index = txq_index;
		}

		snprintf(fp->name, sizeof(fp->name), "%s-fp-%d",
			 edev->ndev->name, rss_id);
	}
2645 2646

	edev->gro_disable = !(edev->ndev->features & NETIF_F_GRO);
2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879
}

static int qede_set_real_num_queues(struct qede_dev *edev)
{
	int rc = 0;

	rc = netif_set_real_num_tx_queues(edev->ndev, QEDE_TSS_CNT(edev));
	if (rc) {
		DP_NOTICE(edev, "Failed to set real number of Tx queues\n");
		return rc;
	}
	rc = netif_set_real_num_rx_queues(edev->ndev, QEDE_RSS_CNT(edev));
	if (rc) {
		DP_NOTICE(edev, "Failed to set real number of Rx queues\n");
		return rc;
	}

	return 0;
}

static void qede_napi_disable_remove(struct qede_dev *edev)
{
	int i;

	for_each_rss(i) {
		napi_disable(&edev->fp_array[i].napi);

		netif_napi_del(&edev->fp_array[i].napi);
	}
}

static void qede_napi_add_enable(struct qede_dev *edev)
{
	int i;

	/* Add NAPI objects */
	for_each_rss(i) {
		netif_napi_add(edev->ndev, &edev->fp_array[i].napi,
			       qede_poll, NAPI_POLL_WEIGHT);
		napi_enable(&edev->fp_array[i].napi);
	}
}

static void qede_sync_free_irqs(struct qede_dev *edev)
{
	int i;

	for (i = 0; i < edev->int_info.used_cnt; i++) {
		if (edev->int_info.msix_cnt) {
			synchronize_irq(edev->int_info.msix[i].vector);
			free_irq(edev->int_info.msix[i].vector,
				 &edev->fp_array[i]);
		} else {
			edev->ops->common->simd_handler_clean(edev->cdev, i);
		}
	}

	edev->int_info.used_cnt = 0;
}

static int qede_req_msix_irqs(struct qede_dev *edev)
{
	int i, rc;

	/* Sanitize number of interrupts == number of prepared RSS queues */
	if (QEDE_RSS_CNT(edev) > edev->int_info.msix_cnt) {
		DP_ERR(edev,
		       "Interrupt mismatch: %d RSS queues > %d MSI-x vectors\n",
		       QEDE_RSS_CNT(edev), edev->int_info.msix_cnt);
		return -EINVAL;
	}

	for (i = 0; i < QEDE_RSS_CNT(edev); i++) {
		rc = request_irq(edev->int_info.msix[i].vector,
				 qede_msix_fp_int, 0, edev->fp_array[i].name,
				 &edev->fp_array[i]);
		if (rc) {
			DP_ERR(edev, "Request fp %d irq failed\n", i);
			qede_sync_free_irqs(edev);
			return rc;
		}
		DP_VERBOSE(edev, NETIF_MSG_INTR,
			   "Requested fp irq for %s [entry %d]. Cookie is at %p\n",
			   edev->fp_array[i].name, i,
			   &edev->fp_array[i]);
		edev->int_info.used_cnt++;
	}

	return 0;
}

static void qede_simd_fp_handler(void *cookie)
{
	struct qede_fastpath *fp = (struct qede_fastpath *)cookie;

	napi_schedule_irqoff(&fp->napi);
}

static int qede_setup_irqs(struct qede_dev *edev)
{
	int i, rc = 0;

	/* Learn Interrupt configuration */
	rc = edev->ops->common->get_fp_int(edev->cdev, &edev->int_info);
	if (rc)
		return rc;

	if (edev->int_info.msix_cnt) {
		rc = qede_req_msix_irqs(edev);
		if (rc)
			return rc;
		edev->ndev->irq = edev->int_info.msix[0].vector;
	} else {
		const struct qed_common_ops *ops;

		/* qed should learn receive the RSS ids and callbacks */
		ops = edev->ops->common;
		for (i = 0; i < QEDE_RSS_CNT(edev); i++)
			ops->simd_handler_config(edev->cdev,
						 &edev->fp_array[i], i,
						 qede_simd_fp_handler);
		edev->int_info.used_cnt = QEDE_RSS_CNT(edev);
	}
	return 0;
}

static int qede_drain_txq(struct qede_dev *edev,
			  struct qede_tx_queue *txq,
			  bool allow_drain)
{
	int rc, cnt = 1000;

	while (txq->sw_tx_cons != txq->sw_tx_prod) {
		if (!cnt) {
			if (allow_drain) {
				DP_NOTICE(edev,
					  "Tx queue[%d] is stuck, requesting MCP to drain\n",
					  txq->index);
				rc = edev->ops->common->drain(edev->cdev);
				if (rc)
					return rc;
				return qede_drain_txq(edev, txq, false);
			}
			DP_NOTICE(edev,
				  "Timeout waiting for tx queue[%d]: PROD=%d, CONS=%d\n",
				  txq->index, txq->sw_tx_prod,
				  txq->sw_tx_cons);
			return -ENODEV;
		}
		cnt--;
		usleep_range(1000, 2000);
		barrier();
	}

	/* FW finished processing, wait for HW to transmit all tx packets */
	usleep_range(1000, 2000);

	return 0;
}

static int qede_stop_queues(struct qede_dev *edev)
{
	struct qed_update_vport_params vport_update_params;
	struct qed_dev *cdev = edev->cdev;
	int rc, tc, i;

	/* Disable the vport */
	memset(&vport_update_params, 0, sizeof(vport_update_params));
	vport_update_params.vport_id = 0;
	vport_update_params.update_vport_active_flg = 1;
	vport_update_params.vport_active_flg = 0;
	vport_update_params.update_rss_flg = 0;

	rc = edev->ops->vport_update(cdev, &vport_update_params);
	if (rc) {
		DP_ERR(edev, "Failed to update vport\n");
		return rc;
	}

	/* Flush Tx queues. If needed, request drain from MCP */
	for_each_rss(i) {
		struct qede_fastpath *fp = &edev->fp_array[i];

		for (tc = 0; tc < edev->num_tc; tc++) {
			struct qede_tx_queue *txq = &fp->txqs[tc];

			rc = qede_drain_txq(edev, txq, true);
			if (rc)
				return rc;
		}
	}

	/* Stop all Queues in reverse order*/
	for (i = QEDE_RSS_CNT(edev) - 1; i >= 0; i--) {
		struct qed_stop_rxq_params rx_params;

		/* Stop the Tx Queue(s)*/
		for (tc = 0; tc < edev->num_tc; tc++) {
			struct qed_stop_txq_params tx_params;

			tx_params.rss_id = i;
			tx_params.tx_queue_id = tc * QEDE_RSS_CNT(edev) + i;
			rc = edev->ops->q_tx_stop(cdev, &tx_params);
			if (rc) {
				DP_ERR(edev, "Failed to stop TXQ #%d\n",
				       tx_params.tx_queue_id);
				return rc;
			}
		}

		/* Stop the Rx Queue*/
		memset(&rx_params, 0, sizeof(rx_params));
		rx_params.rss_id = i;
		rx_params.rx_queue_id = i;

		rc = edev->ops->q_rx_stop(cdev, &rx_params);
		if (rc) {
			DP_ERR(edev, "Failed to stop RXQ #%d\n", i);
			return rc;
		}
	}

	/* Stop the vport */
	rc = edev->ops->vport_stop(cdev, 0);
	if (rc)
		DP_ERR(edev, "Failed to stop VPORT\n");

	return rc;
}

static int qede_start_queues(struct qede_dev *edev)
{
	int rc, tc, i;
2880
	int vlan_removal_en = 1;
2881 2882 2883
	struct qed_dev *cdev = edev->cdev;
	struct qed_update_vport_params vport_update_params;
	struct qed_queue_start_common_params q_params;
2884
	struct qed_start_vport_params start = {0};
2885
	bool reset_rss_indir = false;
2886 2887 2888 2889 2890 2891 2892

	if (!edev->num_rss) {
		DP_ERR(edev,
		       "Cannot update V-VPORT as active as there are no Rx queues\n");
		return -EINVAL;
	}

2893
	start.gro_enable = !edev->gro_disable;
2894 2895 2896 2897 2898 2899
	start.mtu = edev->ndev->mtu;
	start.vport_id = 0;
	start.drop_ttl0 = true;
	start.remove_inner_vlan = vlan_removal_en;

	rc = edev->ops->vport_start(cdev, &start);
2900 2901 2902 2903 2904 2905 2906 2907

	if (rc) {
		DP_ERR(edev, "Start V-PORT failed %d\n", rc);
		return rc;
	}

	DP_VERBOSE(edev, NETIF_MSG_IFUP,
		   "Start vport ramrod passed, vport_id = %d, MTU = %d, vlan_removal_en = %d\n",
2908
		   start.vport_id, edev->ndev->mtu + 0xe, vlan_removal_en);
2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972

	for_each_rss(i) {
		struct qede_fastpath *fp = &edev->fp_array[i];
		dma_addr_t phys_table = fp->rxq->rx_comp_ring.pbl.p_phys_table;

		memset(&q_params, 0, sizeof(q_params));
		q_params.rss_id = i;
		q_params.queue_id = i;
		q_params.vport_id = 0;
		q_params.sb = fp->sb_info->igu_sb_id;
		q_params.sb_idx = RX_PI;

		rc = edev->ops->q_rx_start(cdev, &q_params,
					   fp->rxq->rx_buf_size,
					   fp->rxq->rx_bd_ring.p_phys_addr,
					   phys_table,
					   fp->rxq->rx_comp_ring.page_cnt,
					   &fp->rxq->hw_rxq_prod_addr);
		if (rc) {
			DP_ERR(edev, "Start RXQ #%d failed %d\n", i, rc);
			return rc;
		}

		fp->rxq->hw_cons_ptr = &fp->sb_info->sb_virt->pi_array[RX_PI];

		qede_update_rx_prod(edev, fp->rxq);

		for (tc = 0; tc < edev->num_tc; tc++) {
			struct qede_tx_queue *txq = &fp->txqs[tc];
			int txq_index = tc * QEDE_RSS_CNT(edev) + i;

			memset(&q_params, 0, sizeof(q_params));
			q_params.rss_id = i;
			q_params.queue_id = txq_index;
			q_params.vport_id = 0;
			q_params.sb = fp->sb_info->igu_sb_id;
			q_params.sb_idx = TX_PI(tc);

			rc = edev->ops->q_tx_start(cdev, &q_params,
						   txq->tx_pbl.pbl.p_phys_table,
						   txq->tx_pbl.page_cnt,
						   &txq->doorbell_addr);
			if (rc) {
				DP_ERR(edev, "Start TXQ #%d failed %d\n",
				       txq_index, rc);
				return rc;
			}

			txq->hw_cons_ptr =
				&fp->sb_info->sb_virt->pi_array[TX_PI(tc)];
			SET_FIELD(txq->tx_db.data.params,
				  ETH_DB_DATA_DEST, DB_DEST_XCM);
			SET_FIELD(txq->tx_db.data.params, ETH_DB_DATA_AGG_CMD,
				  DB_AGG_CMD_SET);
			SET_FIELD(txq->tx_db.data.params,
				  ETH_DB_DATA_AGG_VAL_SEL,
				  DQ_XCM_ETH_TX_BD_PROD_CMD);

			txq->tx_db.data.agg_flags = DQ_XCM_ETH_DQ_CF_CMD;
		}
	}

	/* Prepare and send the vport enable */
	memset(&vport_update_params, 0, sizeof(vport_update_params));
2973
	vport_update_params.vport_id = start.vport_id;
2974 2975 2976 2977 2978 2979
	vport_update_params.update_vport_active_flg = 1;
	vport_update_params.vport_active_flg = 1;

	/* Fill struct with RSS params */
	if (QEDE_RSS_CNT(edev) > 1) {
		vport_update_params.update_rss_flg = 1;
2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019

		/* Need to validate current RSS config uses valid entries */
		for (i = 0; i < QED_RSS_IND_TABLE_SIZE; i++) {
			if (edev->rss_params.rss_ind_table[i] >=
			    edev->num_rss) {
				reset_rss_indir = true;
				break;
			}
		}

		if (!(edev->rss_params_inited & QEDE_RSS_INDIR_INITED) ||
		    reset_rss_indir) {
			u16 val;

			for (i = 0; i < QED_RSS_IND_TABLE_SIZE; i++) {
				u16 indir_val;

				val = QEDE_RSS_CNT(edev);
				indir_val = ethtool_rxfh_indir_default(i, val);
				edev->rss_params.rss_ind_table[i] = indir_val;
			}
			edev->rss_params_inited |= QEDE_RSS_INDIR_INITED;
		}

		if (!(edev->rss_params_inited & QEDE_RSS_KEY_INITED)) {
			netdev_rss_key_fill(edev->rss_params.rss_key,
					    sizeof(edev->rss_params.rss_key));
			edev->rss_params_inited |= QEDE_RSS_KEY_INITED;
		}

		if (!(edev->rss_params_inited & QEDE_RSS_CAPS_INITED)) {
			edev->rss_params.rss_caps = QED_RSS_IPV4 |
						    QED_RSS_IPV6 |
						    QED_RSS_IPV4_TCP |
						    QED_RSS_IPV6_TCP;
			edev->rss_params_inited |= QEDE_RSS_CAPS_INITED;
		}

		memcpy(&vport_update_params.rss_params, &edev->rss_params,
		       sizeof(vport_update_params.rss_params));
3020
	} else {
3021 3022
		memset(&vport_update_params.rss_params, 0,
		       sizeof(vport_update_params.rss_params));
3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033
	}

	rc = edev->ops->vport_update(cdev, &vport_update_params);
	if (rc) {
		DP_ERR(edev, "Update V-PORT failed %d\n", rc);
		return rc;
	}

	return 0;
}

3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051
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);
}

3052 3053 3054 3055 3056 3057
enum qede_unload_mode {
	QEDE_UNLOAD_NORMAL,
};

static void qede_unload(struct qede_dev *edev, enum qede_unload_mode mode)
{
S
Sudarsana Kalluru 已提交
3058
	struct qed_link_params link_params;
3059 3060 3061 3062
	int rc;

	DP_INFO(edev, "Starting qede unload\n");

3063 3064 3065
	mutex_lock(&edev->qede_lock);
	edev->state = QEDE_STATE_CLOSED;

3066 3067 3068 3069
	/* Close OS Tx */
	netif_tx_disable(edev->ndev);
	netif_carrier_off(edev->ndev);

S
Sudarsana Kalluru 已提交
3070 3071 3072 3073
	/* Reset the link */
	memset(&link_params, 0, sizeof(link_params));
	link_params.link_up = false;
	edev->ops->common->set_link(edev->cdev, &link_params);
3074 3075 3076 3077 3078 3079 3080 3081
	rc = qede_stop_queues(edev);
	if (rc) {
		qede_sync_free_irqs(edev);
		goto out;
	}

	DP_INFO(edev, "Stopped Queues\n");

3082
	qede_vlan_mark_nonconfigured(edev);
3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104
	edev->ops->fastpath_stop(edev->cdev);

	/* Release the interrupts */
	qede_sync_free_irqs(edev);
	edev->ops->common->set_fp_int(edev->cdev, 0);

	qede_napi_disable_remove(edev);

	qede_free_mem_load(edev);
	qede_free_fp_array(edev);

out:
	mutex_unlock(&edev->qede_lock);
	DP_INFO(edev, "Ending qede unload\n");
}

enum qede_load_mode {
	QEDE_LOAD_NORMAL,
};

static int qede_load(struct qede_dev *edev, enum qede_load_mode mode)
{
S
Sudarsana Kalluru 已提交
3105 3106
	struct qed_link_params link_params;
	struct qed_link_output link_output;
3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146
	int rc;

	DP_INFO(edev, "Starting qede load\n");

	rc = qede_set_num_queues(edev);
	if (rc)
		goto err0;

	rc = qede_alloc_fp_array(edev);
	if (rc)
		goto err0;

	qede_init_fp(edev);

	rc = qede_alloc_mem_load(edev);
	if (rc)
		goto err1;
	DP_INFO(edev, "Allocated %d RSS queues on %d TC/s\n",
		QEDE_RSS_CNT(edev), edev->num_tc);

	rc = qede_set_real_num_queues(edev);
	if (rc)
		goto err2;

	qede_napi_add_enable(edev);
	DP_INFO(edev, "Napi added and enabled\n");

	rc = qede_setup_irqs(edev);
	if (rc)
		goto err3;
	DP_INFO(edev, "Setup IRQs succeeded\n");

	rc = qede_start_queues(edev);
	if (rc)
		goto err4;
	DP_INFO(edev, "Start VPORT, RXQ and TXQ succeeded\n");

	/* Add primary mac and set Rx filters */
	ether_addr_copy(edev->primary_mac, edev->ndev->dev_addr);

3147 3148 3149
	mutex_lock(&edev->qede_lock);
	edev->state = QEDE_STATE_OPEN;
	mutex_unlock(&edev->qede_lock);
S
Sudarsana Kalluru 已提交
3150

3151 3152 3153
	/* Program un-configured VLANs */
	qede_configure_vlan_filters(edev);

S
Sudarsana Kalluru 已提交
3154 3155 3156 3157 3158 3159 3160 3161 3162 3163
	/* Ask for link-up using current configuration */
	memset(&link_params, 0, sizeof(link_params));
	link_params.link_up = true;
	edev->ops->common->set_link(edev->cdev, &link_params);

	/* Query whether link is already-up */
	memset(&link_output, 0, sizeof(link_output));
	edev->ops->common->get_link(edev->cdev, &link_output);
	qede_link_update(edev, &link_output);

3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182
	DP_INFO(edev, "Ending successfully qede load\n");

	return 0;

err4:
	qede_sync_free_irqs(edev);
	memset(&edev->int_info.msix_cnt, 0, sizeof(struct qed_int_info));
err3:
	qede_napi_disable_remove(edev);
err2:
	qede_free_mem_load(edev);
err1:
	edev->ops->common->set_fp_int(edev->cdev, 0);
	qede_free_fp_array(edev);
	edev->num_rss = 0;
err0:
	return rc;
}

3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200
void qede_reload(struct qede_dev *edev,
		 void (*func)(struct qede_dev *, union qede_reload_args *),
		 union qede_reload_args *args)
{
	qede_unload(edev, QEDE_UNLOAD_NORMAL);
	/* Call function handler to update parameters
	 * needed for function load.
	 */
	if (func)
		func(edev, args);

	qede_load(edev, QEDE_LOAD_NORMAL);

	mutex_lock(&edev->qede_lock);
	qede_config_rx_mode(edev->ndev);
	mutex_unlock(&edev->qede_lock);
}

3201 3202 3203 3204
/* called with rtnl_lock */
static int qede_open(struct net_device *ndev)
{
	struct qede_dev *edev = netdev_priv(ndev);
3205
	int rc;
3206 3207 3208 3209 3210

	netif_carrier_off(ndev);

	edev->ops->common->set_power_state(edev->cdev, PCI_D0);

3211 3212 3213 3214 3215 3216 3217 3218 3219
	rc = qede_load(edev, QEDE_LOAD_NORMAL);

	if (rc)
		return rc;

#ifdef CONFIG_QEDE_VXLAN
	vxlan_get_rx_port(ndev);
#endif
	return 0;
3220 3221 3222 3223 3224 3225 3226 3227 3228 3229
}

static int qede_close(struct net_device *ndev)
{
	struct qede_dev *edev = netdev_priv(ndev);

	qede_unload(edev, QEDE_UNLOAD_NORMAL);

	return 0;
}
3230

S
Sudarsana Kalluru 已提交
3231 3232 3233 3234 3235 3236 3237 3238 3239 3240
static void qede_link_update(void *dev, struct qed_link_output *link)
{
	struct qede_dev *edev = dev;

	if (!netif_running(edev->ndev)) {
		DP_VERBOSE(edev, NETIF_MSG_LINK, "Interface is not running\n");
		return;
	}

	if (link->link_up) {
3241 3242 3243 3244 3245
		if (!netif_carrier_ok(edev->ndev)) {
			DP_NOTICE(edev, "Link is up\n");
			netif_tx_start_all_queues(edev->ndev);
			netif_carrier_on(edev->ndev);
		}
S
Sudarsana Kalluru 已提交
3246
	} else {
3247 3248 3249 3250 3251
		if (netif_carrier_ok(edev->ndev)) {
			DP_NOTICE(edev, "Link is down\n");
			netif_tx_disable(edev->ndev);
			netif_carrier_off(edev->ndev);
		}
S
Sudarsana Kalluru 已提交
3252 3253 3254
	}
}

3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426
static int qede_set_mac_addr(struct net_device *ndev, void *p)
{
	struct qede_dev *edev = netdev_priv(ndev);
	struct sockaddr *addr = p;
	int rc;

	ASSERT_RTNL(); /* @@@TBD To be removed */

	DP_INFO(edev, "Set_mac_addr called\n");

	if (!is_valid_ether_addr(addr->sa_data)) {
		DP_NOTICE(edev, "The MAC address is not valid\n");
		return -EFAULT;
	}

	ether_addr_copy(ndev->dev_addr, addr->sa_data);

	if (!netif_running(ndev))  {
		DP_NOTICE(edev, "The device is currently down\n");
		return 0;
	}

	/* Remove the previous primary mac */
	rc = qede_set_ucast_rx_mac(edev, QED_FILTER_XCAST_TYPE_DEL,
				   edev->primary_mac);
	if (rc)
		return rc;

	/* Add MAC filter according to the new unicast HW MAC address */
	ether_addr_copy(edev->primary_mac, ndev->dev_addr);
	return qede_set_ucast_rx_mac(edev, QED_FILTER_XCAST_TYPE_ADD,
				      edev->primary_mac);
}

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;
}

static void qede_set_rx_mode(struct net_device *ndev)
{
	struct qede_dev *edev = netdev_priv(ndev);

	DP_INFO(edev, "qede_set_rx_mode called\n");

	if (edev->state != QEDE_STATE_OPEN) {
		DP_INFO(edev,
			"qede_set_rx_mode called while interface is down\n");
	} else {
		set_bit(QEDE_SP_RX_MODE, &edev->sp_flags);
		schedule_delayed_work(&edev->sp_task, 0);
	}
}

/* Must be called with qede_lock held */
static void qede_config_rx_mode(struct net_device *ndev)
{
	enum qed_filter_rx_mode_type accept_flags = QED_FILTER_TYPE_UCAST;
	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
	 * (configrue / leave the primary mac)
	 */
	rc = qede_set_ucast_rx_mac(edev, QED_FILTER_XCAST_TYPE_REPLACE,
				   edev->primary_mac);
	if (rc)
		goto out;

	/* Check for promiscuous */
	if ((ndev->flags & IFF_PROMISC) ||
	    (uc_count > 15)) { /* @@@TBD resource allocation - 1 */
		accept_flags = QED_FILTER_RX_MODE_TYPE_PROMISC;
	} else {
		/* Add MAC filters according to the unicast secondary macs */
		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;
		}

		rc = qede_configure_mcast_filtering(ndev, &accept_flags);
		if (rc)
			goto out;
	}

3427 3428 3429 3430 3431 3432 3433 3434 3435 3436 3437
	/* 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);
	}

3438 3439 3440 3441 3442
	rx_mode.filter.accept_flags = accept_flags;
	edev->ops->filter_config(edev->cdev, &rx_mode);
out:
	kfree(uc_macs);
}