Release 4.11 drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c

Directory: drivers/net/ethernet/qlogic/qlcnic
/*
 * QLogic qlcnic NIC Driver
 * Copyright (c) 2009-2013 QLogic Corporation
 *
 * See LICENSE.qlcnic for copyright and licensing details.
 */

#include <linux/netdevice.h>
#include <linux/if_vlan.h>
#include <net/ip.h>
#include <linux/ipv6.h>
#include <net/checksum.h>
#include <linux/printk.h>

#include "qlcnic.h"


#define QLCNIC_TX_ETHER_PKT		0x01

#define QLCNIC_TX_TCP_PKT		0x02

#define QLCNIC_TX_UDP_PKT		0x03

#define QLCNIC_TX_IP_PKT		0x04

#define QLCNIC_TX_TCP_LSO		0x05

#define QLCNIC_TX_TCP_LSO6		0x06

#define QLCNIC_TX_ENCAP_PKT		0x07

#define QLCNIC_TX_ENCAP_LSO		0x08

#define QLCNIC_TX_TCPV6_PKT		0x0b

#define QLCNIC_TX_UDPV6_PKT		0x0c


#define QLCNIC_FLAGS_VLAN_TAGGED	0x10

#define QLCNIC_FLAGS_VLAN_OOB		0x40


#define qlcnic_set_tx_vlan_tci(cmd_desc, v)	\
	(cmd_desc)->vlan_TCI = cpu_to_le16(v);

#define qlcnic_set_cmd_desc_port(cmd_desc, var)	\
	((cmd_desc)->port_ctxid |= ((var) & 0x0F))

#define qlcnic_set_cmd_desc_ctxid(cmd_desc, var)	\
	((cmd_desc)->port_ctxid |= ((var) << 4 & 0xF0))


#define qlcnic_set_tx_port(_desc, _port) \
	((_desc)->port_ctxid = ((_port) & 0xf) | (((_port) << 4) & 0xf0))


#define qlcnic_set_tx_flags_opcode(_desc, _flags, _opcode) \
	((_desc)->flags_opcode |= \
        cpu_to_le16(((_flags) & 0x7f) | (((_opcode) & 0x3f) << 7)))


#define qlcnic_set_tx_frags_len(_desc, _frags, _len) \
	((_desc)->nfrags__length = \
        cpu_to_le32(((_frags) & 0xff) | (((_len) & 0xffffff) << 8)))

/* owner bits of status_desc */

#define STATUS_OWNER_HOST	(0x1ULL << 56)

#define STATUS_OWNER_PHANTOM	(0x2ULL << 56)

/* Status descriptor:
   0-3 port, 4-7 status, 8-11 type, 12-27 total_length
   28-43 reference_handle, 44-47 protocol, 48-52 pkt_offset
   53-55 desc_cnt, 56-57 owner, 58-63 opcode
 */

#define qlcnic_get_sts_port(sts_data)	\
	((sts_data) & 0x0F)

#define qlcnic_get_sts_status(sts_data)	\
	(((sts_data) >> 4) & 0x0F)

#define qlcnic_get_sts_type(sts_data)	\
	(((sts_data) >> 8) & 0x0F)

#define qlcnic_get_sts_totallength(sts_data)	\
	(((sts_data) >> 12) & 0xFFFF)

#define qlcnic_get_sts_refhandle(sts_data)	\
	(((sts_data) >> 28) & 0xFFFF)

#define qlcnic_get_sts_prot(sts_data)	\
	(((sts_data) >> 44) & 0x0F)

#define qlcnic_get_sts_pkt_offset(sts_data)	\
	(((sts_data) >> 48) & 0x1F)

#define qlcnic_get_sts_desc_cnt(sts_data)	\
	(((sts_data) >> 53) & 0x7)

#define qlcnic_get_sts_opcode(sts_data)	\
	(((sts_data) >> 58) & 0x03F)


#define qlcnic_get_lro_sts_refhandle(sts_data) 	\
	((sts_data) & 0x07FFF)

#define qlcnic_get_lro_sts_length(sts_data)	\
	(((sts_data) >> 16) & 0x0FFFF)

#define qlcnic_get_lro_sts_l2_hdr_offset(sts_data)	\
	(((sts_data) >> 32) & 0x0FF)

#define qlcnic_get_lro_sts_l4_hdr_offset(sts_data)	\
	(((sts_data) >> 40) & 0x0FF)

#define qlcnic_get_lro_sts_timestamp(sts_data)	\
	(((sts_data) >> 48) & 0x1)

#define qlcnic_get_lro_sts_type(sts_data)	\
	(((sts_data) >> 49) & 0x7)

#define qlcnic_get_lro_sts_push_flag(sts_data)		\
	(((sts_data) >> 52) & 0x1)

#define qlcnic_get_lro_sts_seq_number(sts_data)		\
	((sts_data) & 0x0FFFFFFFF)

#define qlcnic_get_lro_sts_mss(sts_data1)		\
	((sts_data1 >> 32) & 0x0FFFF)


#define qlcnic_83xx_get_lro_sts_mss(sts) ((sts) & 0xffff)

/* opcode field in status_desc */

#define QLCNIC_SYN_OFFLOAD	0x03

#define QLCNIC_RXPKT_DESC  	0x04

#define QLCNIC_OLD_RXPKT_DESC	0x3f

#define QLCNIC_RESPONSE_DESC	0x05

#define QLCNIC_LRO_DESC  	0x12


#define QLCNIC_TCP_HDR_SIZE		20

#define QLCNIC_TCP_TS_OPTION_SIZE	12

#define QLCNIC_FETCH_RING_ID(handle)	((handle) >> 63)

#define QLCNIC_DESC_OWNER_FW		cpu_to_le64(STATUS_OWNER_PHANTOM)


#define QLCNIC_TCP_TS_HDR_SIZE (QLCNIC_TCP_HDR_SIZE + QLCNIC_TCP_TS_OPTION_SIZE)

/* for status field in status_desc */

#define STATUS_CKSUM_LOOP	0

#define STATUS_CKSUM_OK		2


#define qlcnic_83xx_pktln(sts)		((sts >> 32) & 0x3FFF)

#define qlcnic_83xx_hndl(sts)		((sts >> 48) & 0x7FFF)

#define qlcnic_83xx_csum_status(sts)	((sts >> 39) & 7)

#define qlcnic_83xx_opcode(sts)	((sts >> 42) & 0xF)

#define qlcnic_83xx_vlan_tag(sts)	(((sts) >> 48) & 0xFFFF)

#define qlcnic_83xx_lro_pktln(sts)	(((sts) >> 32) & 0x3FFF)

#define qlcnic_83xx_l2_hdr_off(sts)	(((sts) >> 16) & 0xFF)

#define qlcnic_83xx_l4_hdr_off(sts)	(((sts) >> 24) & 0xFF)

#define qlcnic_83xx_pkt_cnt(sts)	(((sts) >> 16) & 0x7)

#define qlcnic_83xx_is_tstamp(sts)	(((sts) >> 40) & 1)

#define qlcnic_83xx_is_psh_bit(sts)	(((sts) >> 41) & 1)

#define qlcnic_83xx_is_ip_align(sts)	(((sts) >> 46) & 1)

#define qlcnic_83xx_has_vlan_tag(sts)	(((sts) >> 47) & 1)

static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
				   int max);

static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *,
					    struct qlcnic_host_rds_ring *,
					    u16, u16);



static inline u8 qlcnic_mac_hash(u64 mac, u16 vlan)
{
	return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff) ^ (vlan & 0xff));
}

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static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter,
					u16 handle, u8 ring_id)
{
	if (qlcnic_83xx_check(adapter))
		return handle | (ring_id << 15);
	else
		return handle;
}

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static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data)
{
	return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0;
}

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static void qlcnic_delete_rx_list_mac(struct qlcnic_adapter *adapter,
				      struct qlcnic_filter *fil,
				      void *addr, u16 vlan_id)
{
	int ret;
	u8 op;

	op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
	ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
	if (ret)
		return;

	op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
	ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
	if (!ret) {
		hlist_del(&fil->fnode);
		adapter->rx_fhash.fnum--;
	}
}

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static struct qlcnic_filter *qlcnic_find_mac_filter(struct hlist_head *head,
						    void *addr, u16 vlan_id)
{
	struct qlcnic_filter *tmp_fil = NULL;
	struct hlist_node *n;

	hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
		if (ether_addr_equal(tmp_fil->faddr, addr) &&
		    tmp_fil->vlan_id == vlan_id)
			return tmp_fil;
	}

	return NULL;
}

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static void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter,
				 struct sk_buff *skb, int loopback_pkt, u16 vlan_id)
{
	struct ethhdr *phdr = (struct ethhdr *)(skb->data);
	struct qlcnic_filter *fil, *tmp_fil;
	struct hlist_head *head;
	unsigned long time;
	u64 src_addr = 0;
	u8 hindex, op;
	int ret;

	if (!qlcnic_sriov_pf_check(adapter) || (vlan_id == 0xffff))
		vlan_id = 0;

	memcpy(&src_addr, phdr->h_source, ETH_ALEN);
	hindex = qlcnic_mac_hash(src_addr, vlan_id) &
		 (adapter->fhash.fbucket_size - 1);

	if (loopback_pkt) {
		if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax)
			return;

		head = &(adapter->rx_fhash.fhead[hindex]);

		tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
		if (tmp_fil) {
			time = tmp_fil->ftime;
			if (time_after(jiffies, QLCNIC_READD_AGE * HZ + time))
				tmp_fil->ftime = jiffies;
			return;
		}

		fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
		if (!fil)
			return;

		fil->ftime = jiffies;
		memcpy(fil->faddr, &src_addr, ETH_ALEN);
		fil->vlan_id = vlan_id;
		spin_lock(&adapter->rx_mac_learn_lock);
		hlist_add_head(&(fil->fnode), head);
		adapter->rx_fhash.fnum++;
		spin_unlock(&adapter->rx_mac_learn_lock);
	} else {
		head = &adapter->fhash.fhead[hindex];

		spin_lock(&adapter->mac_learn_lock);

		tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
		if (tmp_fil) {
			op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
			ret = qlcnic_sre_macaddr_change(adapter,
							(u8 *)&src_addr,
							vlan_id, op);
			if (!ret) {
				hlist_del(&tmp_fil->fnode);
				adapter->fhash.fnum--;
			}

			spin_unlock(&adapter->mac_learn_lock);

			return;
		}

		spin_unlock(&adapter->mac_learn_lock);

		head = &adapter->rx_fhash.fhead[hindex];

		spin_lock(&adapter->rx_mac_learn_lock);

		tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
		if (tmp_fil)
			qlcnic_delete_rx_list_mac(adapter, tmp_fil, &src_addr,
						  vlan_id);

		spin_unlock(&adapter->rx_mac_learn_lock);
	}
}

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Total 436 100.00% 5 100.00%



void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr,
			       u16 vlan_id)
{
	struct cmd_desc_type0 *hwdesc;
	struct qlcnic_nic_req *req;
	struct qlcnic_mac_req *mac_req;
	struct qlcnic_vlan_req *vlan_req;
	struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
	u32 producer;
	u64 word;

	producer = tx_ring->producer;
	hwdesc = &tx_ring->desc_head[tx_ring->producer];

	req = (struct qlcnic_nic_req *)hwdesc;
	memset(req, 0, sizeof(struct qlcnic_nic_req));
	req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23);

	word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16);
	req->req_hdr = cpu_to_le64(word);

	mac_req = (struct qlcnic_mac_req *)&(req->words[0]);
	mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
	memcpy(mac_req->mac_addr, uaddr, ETH_ALEN);

	vlan_req = (struct qlcnic_vlan_req *)&req->words[1];
	vlan_req->vlan_id = cpu_to_le16(vlan_id);

	tx_ring->producer = get_next_index(producer, tx_ring->num_desc);
	smp_mb();
}

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static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
			       struct cmd_desc_type0 *first_desc,
			       struct sk_buff *skb)
{
	struct vlan_ethhdr *vh = (struct vlan_ethhdr *)(skb->data);
	struct ethhdr *phdr = (struct ethhdr *)(skb->data);
	u16 protocol = ntohs(skb->protocol);
	struct qlcnic_filter *fil, *tmp_fil;
	struct hlist_head *head;
	struct hlist_node *n;
	u64 src_addr = 0;
	u16 vlan_id = 0;
	u8 hindex, hval;

	if (ether_addr_equal(phdr->h_source, adapter->mac_addr))
		return;

	if (adapter->flags & QLCNIC_VLAN_FILTERING) {
		if (protocol == ETH_P_8021Q) {
			vh = (struct vlan_ethhdr *)skb->data;
			vlan_id = ntohs(vh->h_vlan_TCI);
		} else if (skb_vlan_tag_present(skb)) {
			vlan_id = skb_vlan_tag_get(skb);
		}
	}

	memcpy(&src_addr, phdr->h_source, ETH_ALEN);
	hval = qlcnic_mac_hash(src_addr, vlan_id);
	hindex = hval & (adapter->fhash.fbucket_size - 1);
	head = &(adapter->fhash.fhead[hindex]);

	hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
		if (ether_addr_equal(tmp_fil->faddr, (u8 *)&src_addr) &&
		    tmp_fil->vlan_id == vlan_id) {
			if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
				qlcnic_change_filter(adapter, &src_addr,
						     vlan_id);
			tmp_fil->ftime = jiffies;
			return;
		}
	}

	if (unlikely(adapter->fhash.fnum >= adapter->fhash.fmax)) {
		adapter->stats.mac_filter_limit_overrun++;
		return;
	}

	fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
	if (!fil)
		return;

	qlcnic_change_filter(adapter, &src_addr, vlan_id);
	fil->ftime = jiffies;
	fil->vlan_id = vlan_id;
	memcpy(fil->faddr, &src_addr, ETH_ALEN);
	spin_lock(&adapter->mac_learn_lock);
	hlist_add_head(&(fil->fnode), head);
	adapter->fhash.fnum++;
	spin_unlock(&adapter->mac_learn_lock);
}

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Total 396 100.00% 10 100.00%


#define QLCNIC_ENCAP_VXLAN_PKT		BIT_0

#define QLCNIC_ENCAP_OUTER_L3_IP6	BIT_1

#define QLCNIC_ENCAP_INNER_L3_IP6	BIT_2

#define QLCNIC_ENCAP_INNER_L4_UDP	BIT_3

#define QLCNIC_ENCAP_DO_L3_CSUM		BIT_4

#define QLCNIC_ENCAP_DO_L4_CSUM		BIT_5



static int qlcnic_tx_encap_pkt(struct qlcnic_adapter *adapter,
			       struct cmd_desc_type0 *first_desc,
			       struct sk_buff *skb,
			       struct qlcnic_host_tx_ring *tx_ring)
{
	u8 opcode = 0, inner_hdr_len = 0, outer_hdr_len = 0, total_hdr_len = 0;
	int copied, copy_len, descr_size;
	u32 producer = tx_ring->producer;
	struct cmd_desc_type0 *hwdesc;
	u16 flags = 0, encap_descr = 0;

	opcode = QLCNIC_TX_ETHER_PKT;
	encap_descr = QLCNIC_ENCAP_VXLAN_PKT;

	if (skb_is_gso(skb)) {
		inner_hdr_len = skb_inner_transport_header(skb) +
				inner_tcp_hdrlen(skb) -
				skb_inner_mac_header(skb);

		/* VXLAN header size = 8 */
		outer_hdr_len = skb_transport_offset(skb) + 8 +
				sizeof(struct udphdr);
		first_desc->outer_hdr_length = outer_hdr_len;
		total_hdr_len = inner_hdr_len + outer_hdr_len;
		encap_descr |= QLCNIC_ENCAP_DO_L3_CSUM |
			       QLCNIC_ENCAP_DO_L4_CSUM;
		first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
		first_desc->hdr_length = inner_hdr_len;

		/* Copy inner and outer headers in Tx descriptor(s)
                 * If total_hdr_len > cmd_desc_type0, use multiple
                 * descriptors
                 */
		copied = 0;
		descr_size = (int)sizeof(struct cmd_desc_type0);
		while (copied < total_hdr_len) {
			copy_len = min(descr_size, (total_hdr_len - copied));
			hwdesc = &tx_ring->desc_head[producer];
			tx_ring->cmd_buf_arr[producer].skb = NULL;
			skb_copy_from_linear_data_offset(skb, copied,
							 (char *)hwdesc,
							 copy_len);
			copied += copy_len;
			producer = get_next_index(producer, tx_ring->num_desc);
		}

		tx_ring->producer = producer;

		/* Make sure updated tx_ring->producer is visible
                 * for qlcnic_tx_avail()
                 */
		smp_mb();
		adapter->stats.encap_lso_frames++;

		opcode = QLCNIC_TX_ENCAP_LSO;
	} else if (skb->ip_summed == CHECKSUM_PARTIAL) {
		if (inner_ip_hdr(skb)->version == 6) {
			if (inner_ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
				encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP;
		} else {
			if (inner_ip_hdr(skb)->protocol == IPPROTO_UDP)
				encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP;
		}

		adapter->stats.encap_tx_csummed++;
		opcode = QLCNIC_TX_ENCAP_PKT;
	}

	/* Prepare first 16 bits of byte offset 16 of Tx descriptor */
	if (ip_hdr(skb)->version == 6)
		encap_descr |= QLCNIC_ENCAP_OUTER_L3_IP6;

	/* outer IP header's size in 32bit words size*/
	encap_descr |= (skb_network_header_len(skb) >> 2) << 6;

	/* outer IP header offset */
	encap_descr |= skb_network_offset(skb) << 10;
	first_desc->encap_descr = cpu_to_le16(encap_descr);

	first_desc->tcp_hdr_offset = skb_inner_transport_header(skb) -
				     skb->data;
	first_desc->ip_hdr_offset = skb_inner_network_offset(skb);

	qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);

	return 0;
}

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static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
			 struct cmd_desc_type0 *first_desc, struct sk_buff *skb,
			 struct qlcnic_host_tx_ring *tx_ring)
{
	u8 l4proto, opcode = 0, hdr_len = 0;
	u16 flags = 0, vlan_tci = 0;
	int copied, offset, copy_len, size;
	struct cmd_desc_type0 *hwdesc;
	struct vlan_ethhdr *vh;
	u16 protocol = ntohs(skb->protocol);
	u32 producer = tx_ring->producer;

	if (protocol == ETH_P_8021Q) {
		vh = (struct vlan_ethhdr *)skb->data;
		flags = QLCNIC_FLAGS_VLAN_TAGGED;
		vlan_tci = ntohs(vh->h_vlan_TCI);
		protocol = ntohs(vh->h_vlan_encapsulated_proto);
	} else if (skb_vlan_tag_present(skb)) {
		flags = QLCNIC_FLAGS_VLAN_OOB;
		vlan_tci = skb_vlan_tag_get(skb);
	}
	if (unlikely(adapter->tx_pvid)) {
		if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED))
			return -EIO;
		if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED))
			goto set_flags;

		flags = QLCNIC_FLAGS_VLAN_OOB;
		vlan_tci = adapter->tx_pvid;
	}
set_flags:
	qlcnic_set_tx_vlan_tci(first_desc, vlan_tci);
	qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);

	if (*(skb->data) & BIT_0) {
		flags |= BIT_0;
		memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN);
	}
	opcode = QLCNIC_TX_ETHER_PKT;
	if (skb_is_gso(skb)) {
		hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
		first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
		first_desc->hdr_length = hdr_len;
		opcode = (protocol == ETH_P_IPV6) ? QLCNIC_TX_TCP_LSO6 :
						    QLCNIC_TX_TCP_LSO;

		/* For LSO, we need to copy the MAC/IP/TCP headers into
                * the descriptor ring */
		copied = 0;
		offset = 2;

		if (flags & QLCNIC_FLAGS_VLAN_OOB) {
			first_desc->hdr_length += VLAN_HLEN;
			first_desc->tcp_hdr_offset = VLAN_HLEN;
			first_desc->ip_hdr_offset = VLAN_HLEN;

			/* Only in case of TSO on vlan device */
			flags |= QLCNIC_FLAGS_VLAN_TAGGED;

			/* Create a TSO vlan header template for firmware */
			hwdesc = &tx_ring->desc_head[producer];
			tx_ring->cmd_buf_arr[producer].skb = NULL;

			copy_len = min((int)sizeof(struct cmd_desc_type0) -
				       offset, hdr_len + VLAN_HLEN);

			vh = (struct vlan_ethhdr *)((char *) hwdesc + 2);
			skb_copy_from_linear_data(skb, vh, 12);
			vh->h_vlan_proto = htons(ETH_P_8021Q);
			vh->h_vlan_TCI = htons(vlan_tci);

			skb_copy_from_linear_data_offset(skb, 12,
							 (char *)vh + 16,
							 copy_len - 16);
			copied = copy_len - VLAN_HLEN;
			offset = 0;
			producer = get_next_index(producer, tx_ring->num_desc);
		}

		while (copied < hdr_len) {
			size = (int)sizeof(struct cmd_desc_type0) - offset;
			copy_len = min(size, (hdr_len - copied));
			hwdesc = &tx_ring->desc_head[producer];
			tx_ring->cmd_buf_arr[producer].skb = NULL;
			skb_copy_from_linear_data_offset(skb, copied,
							 (char *)hwdesc +
							 offset, copy_len);
			copied += copy_len;
			offset = 0;
			producer = get_next_index(producer, tx_ring->num_desc);
		}

		tx_ring->producer = producer;
		smp_mb();
		adapter->stats.lso_frames++;

	} else if (skb->ip_summed == CHECKSUM_PARTIAL) {
		if (protocol == ETH_P_IP) {
			l4proto = ip_hdr(skb)->protocol;

			if (l4proto == IPPROTO_TCP)
				opcode = QLCNIC_TX_TCP_PKT;
			else if (l4proto == IPPROTO_UDP)
				opcode = QLCNIC_TX_UDP_PKT;
		} else if (protocol == ETH_P_IPV6) {
			l4proto = ipv6_hdr(skb)->nexthdr;

			if (l4proto == IPPROTO_TCP)
				opcode = QLCNIC_TX_TCPV6_PKT;
			else if (l4proto == IPPROTO_UDP)
				opcode = QLCNIC_TX_UDPV6_PKT;
		}
	}
	first_desc->tcp_hdr_offset += skb_transport_offset(skb);
	first_desc->ip_hdr_offset += skb_network_offset(skb);
	qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Sony Chacko 670 96.54% 2 28.57%
Shahed Shaikh 14 2.02% 1 14.29%
Himanshu Madhani 5 0.72% 1 14.29%
Jiri Pirko 2 0.29% 1 14.29%
Rajesh K Borundia 2 0.29% 1 14.29%
Sritej Velaga 1 0.14% 1 14.29%
Total 694 100.00% 7 100.00%



static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb,
			     struct qlcnic_cmd_buffer *pbuf)
{
	struct qlcnic_skb_frag *nf;
	struct skb_frag_struct *frag;
	int i, nr_frags;
	dma_addr_t map;

	nr_frags = skb_shinfo(skb)->nr_frags;
	nf = &pbuf->frag_array[0];

	map = pci_map_single(pdev, skb->data, skb_headlen(skb),
			     PCI_DMA_TODEVICE);
	if (pci_dma_mapping_error(pdev, map))
		goto out_err;

	nf->dma = map;
	nf->length = skb_headlen(skb);

	for (i = 0; i < nr_frags; i++) {
		frag = &skb_shinfo(skb)->frags[i];
		nf = &pbuf->frag_array[i+1];
		map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag),
				       DMA_TO_DEVICE);
		if (dma_mapping_error(&pdev->dev, map))
			goto unwind;

		nf->dma = map;
		nf->length = skb_frag_size(frag);
	}

	return 0;

unwind:
	while (--i >= 0) {
		nf = &pbuf->frag_array[i+1];
		pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
	}

	nf = &pbuf->frag_array[0];
	pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);

out_err:
	return -ENOMEM;
}

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Sony Chacko 267 100.00% 1 100.00%
Total 267 100.00% 1 100.00%



static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb,
				 struct qlcnic_cmd_buffer *pbuf)
{
	struct qlcnic_skb_frag *nf = &pbuf->frag_array[0];
	int i, nr_frags = skb_shinfo(skb)->nr_frags;

	for (i = 0; i < nr_frags; i++) {
		nf = &pbuf->frag_array[i+1];
		pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
	}

	nf = &pbuf->frag_array[0];
	pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
	pbuf->skb = NULL;
}

Contributors
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Sony Chacko 120 100.00% 2 100.00%
Total 120 100.00% 2 100.00%



static inline void qlcnic_clear_cmddesc(u64 *desc)
{
	desc[0] = 0ULL;
	desc[2] = 0ULL;
	desc[7] = 0ULL;
}

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Sony Chacko 32 100.00% 1 100.00%
Total 32 100.00% 1 100.00%



netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
{
	struct qlcnic_adapter *adapter = netdev_priv(netdev);
	struct qlcnic_host_tx_ring *tx_ring;
	struct qlcnic_cmd_buffer *pbuf;
	struct qlcnic_skb_frag *buffrag;
	struct cmd_desc_type0 *hwdesc, *first_desc;
	struct pci_dev *pdev;
	struct ethhdr *phdr;
	int i, k, frag_count, delta = 0;
	u32 producer, num_txd;
	u16 protocol;
	bool l4_is_udp = false;

	if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
		netif_tx_stop_all_queues(netdev);
		return NETDEV_TX_BUSY;
	}

	if (adapter->flags & QLCNIC_MACSPOOF) {
		phdr = (struct ethhdr *)skb->data;
		if (!ether_addr_equal(phdr->h_source, adapter->mac_addr))
			goto drop_packet;
	}

	tx_ring = &adapter->tx_ring[skb_get_queue_mapping(skb)];
	num_txd = tx_ring->num_desc;

	frag_count = skb_shinfo(skb)->nr_frags + 1;

	/* 14 frags supported for normal packet and
         * 32 frags supported for TSO packet
         */
	if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) {
		for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++)
			delta += skb_frag_size(&skb_shinfo(skb)->frags[i]);

		if (!__pskb_pull_tail(skb, delta))
			goto drop_packet;

		frag_count = 1 + skb_shinfo(skb)->nr_frags;
	}

	if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) {
		netif_tx_stop_queue(tx_ring->txq);
		if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
			netif_tx_start_queue(tx_ring->txq);
		} else {
			tx_ring->tx_stats.xmit_off++;
			return NETDEV_TX_BUSY;
		}
	}

	producer = tx_ring->producer;
	pbuf = &tx_ring->cmd_buf_arr[producer];
	pdev = adapter->pdev;
	first_desc = &tx_ring->desc_head[producer];
	hwdesc = &tx_ring->desc_head[producer];
	qlcnic_clear_cmddesc((u64 *)hwdesc);

	if (qlcnic_map_tx_skb(pdev, skb, pbuf)) {
		adapter->stats.tx_dma_map_error++;
		goto drop_packet;
	}

	pbuf->skb = skb;
	pbuf->frag_count = frag_count;

	qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len);
	qlcnic_set_tx_port(first_desc, adapter->portnum);

	for (i = 0; i < frag_count; i++) {
		k = i % 4;

		if ((k == 0) && (i > 0)) {
			/* move to next desc.*/
			producer = get_next_index(producer, num_txd);
			hwdesc = &tx_ring->desc_head[producer];
			qlcnic_clear_cmddesc((u64 *)hwdesc);
			tx_ring->cmd_buf_arr[producer].skb = NULL;
		}

		buffrag = &pbuf->frag_array[i];
		hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length);
		switch (k) {
		case 0:
			hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
			break;
		case 1:
			hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma);
			break;
		case 2:
			hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma);
			break;
		case 3:
			hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma);
			break;
		}
	}

	tx_ring->producer = get_next_index(producer, num_txd);
	smp_mb();

	protocol = ntohs(skb->protocol);
	if (protocol == ETH_P_IP)
		l4_is_udp = ip_hdr(skb)->protocol == IPPROTO_UDP;
	else if (protocol == ETH_P_IPV6)
		l4_is_udp = ipv6_hdr(skb)->nexthdr == IPPROTO_UDP;

	/* Check if it is a VXLAN packet */
	if (!skb->encapsulation || !l4_is_udp ||
	    !qlcnic_encap_tx_offload(adapter)) {
		if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb,
					   tx_ring)))
			goto unwind_buff;
	} else {
		if (unlikely(qlcnic_tx_encap_pkt(adapter, first_desc,
						 skb, tx_ring)))
			goto unwind_buff;
	}

	if (adapter->drv_mac_learn)
		qlcnic_send_filter(adapter, first_desc, skb);

	tx_ring->tx_stats.tx_bytes += skb->len;
	tx_ring->tx_stats.xmit_called++;

	/* Ensure writes are complete before HW fetches Tx descriptors */
	wmb();
	qlcnic_update_cmd_producer(tx_ring);

	return NETDEV_TX_OK;

unwind_buff:
	qlcnic_unmap_buffers(pdev, skb, pbuf);
drop_packet:
	adapter->stats.txdropped++;
	dev_kfree_skb_any(skb);
	return NETDEV_TX_OK;
}

Contributors
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Sony Chacko 619 81.45% 3 42.86%
Shahed Shaikh 93 12.24% 1 14.29%
Himanshu Madhani 47 6.18% 2 28.57%
Jitendra Kalsaria 1 0.13% 1 14.29%
Total 760 100.00% 7 100.00%



void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup)
{
	struct net_device *netdev = adapter->netdev;

	if (adapter->ahw->linkup && !linkup) {
		netdev_info(netdev, "NIC Link is down\n");
		adapter->ahw->linkup = 0;
		netif_carrier_off(netdev);
	} else if (!adapter->ahw->linkup && linkup) {
		adapter->ahw->linkup = 1;

		/* Do not advertise Link up to the stack if device
                 * is in loopback mode
                 */
		if (qlcnic_83xx_check(adapter) && adapter->ahw->lb_mode) {
			netdev_info(netdev, "NIC Link is up for loopback test\n");
			return;
		}

		netdev_info(netdev, "NIC Link is up\n");
		netif_carrier_on(netdev);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Sony Chacko 81 71.68% 1 33.33%
Shahed Shaikh 18 15.93% 1 33.33%
Manish Chopra 14 12.39% 1 33.33%
Total 113 100.00% 3 100.00%



static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
			       struct qlcnic_host_rds_ring *rds_ring,
			       struct qlcnic_rx_buffer *buffer)
{
	struct sk_buff *skb;
	dma_addr_t dma;
	struct pci_dev *pdev = adapter->pdev;

	skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size);
	if (!skb) {
		adapter->stats.skb_alloc_failure++;
		return -ENOMEM;
	}

	skb_reserve(skb, NET_IP_ALIGN);
	dma = pci_map_single(pdev, skb->data,
			     rds_ring->dma_size, PCI_DMA_FROMDEVICE);

	if (pci_dma_mapping_error(pdev, dma)) {
		adapter->stats.rx_dma_map_error++;
		dev_kfree_skb_any(skb);
		return -ENOMEM;
	}

	buffer->skb = skb;
	buffer->dma = dma;

	return 0;
}

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Sony Chacko 135 100.00% 1 100.00%
Total 135 100.00% 1 100.00%



static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
					struct qlcnic_host_rds_ring *rds_ring,
					u8 ring_id)
{
	struct rcv_desc *pdesc;
	struct qlcnic_rx_buffer *buffer;
	int  count = 0;
	uint32_t producer, handle;
	struct list_head *head;

	if (!spin_trylock(&rds_ring->lock))
		return;

	producer = rds_ring->producer;
	head = &rds_ring->free_list;
	while (!list_empty(head)) {
		buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);

		if (!buffer->skb) {
			if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
				break;
		}
		count++;
		list_del(&buffer->list);

		/* make a rcv descriptor  */
		pdesc = &rds_ring->desc_head[producer];
		handle = qlcnic_get_ref_handle(adapter,
					       buffer->ref_handle, ring_id);
		pdesc->reference_handle = cpu_to_le16(handle);
		pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
		pdesc->addr_buffer = cpu_to_le64(buffer->dma);
		producer = get_next_index(producer, rds_ring->num_desc);
	}
	if (count) {
		rds_ring->producer = producer;
		writel((producer - 1) & (rds_ring->num_desc - 1),
		       rds_ring->crb_rcv_producer);
	}
	spin_unlock(&rds_ring->lock);
}

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Sony Chacko 232 100.00% 2 100.00%
Total 232 100.00% 2 100.00%



static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter,
				   struct qlcnic_host_tx_ring *tx_ring,
				   int budget)
{
	u32 sw_consumer, hw_consumer;
	int i, done, count = 0;
	struct qlcnic_cmd_buffer *buffer;
	struct pci_dev *pdev = adapter->pdev;
	struct net_device *netdev = adapter->netdev;
	struct qlcnic_skb_frag *frag;

	if (!spin_trylock(&tx_ring->tx_clean_lock))
		return 1;

	sw_consumer = tx_ring->sw_consumer;
	hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));

	while (sw_consumer != hw_consumer) {
		buffer = &tx_ring->cmd_buf_arr[sw_consumer];
		if (buffer->skb) {
			frag = &buffer->frag_array[0];
			pci_unmap_single(pdev, frag->dma, frag->length,
					 PCI_DMA_TODEVICE);
			frag->dma = 0ULL;
			for (i = 1; i < buffer->frag_count; i++) {
				frag++;
				pci_unmap_page(pdev, frag->dma, frag->length,
					       PCI_DMA_TODEVICE);
				frag->dma = 0ULL;
			}
			tx_ring->tx_stats.xmit_finished++;
			dev_kfree_skb_any(buffer->skb);
			buffer->skb = NULL;
		}

		sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
		if (++count >= budget)
			break;
	}

	tx_ring->sw_consumer = sw_consumer;

	if (count && netif_running(netdev)) {
		smp_mb();
		if (netif_tx_queue_stopped(tx_ring->txq) &&
		    netif_carrier_ok(netdev)) {
			if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
				netif_tx_wake_queue(tx_ring->txq);
				tx_ring->tx_stats.xmit_on++;
			}
		}
		adapter->tx_timeo_cnt = 0;
	}
	/*
         * If everything is freed up to consumer then check if the ring is full
         * If the ring is full then check if more needs to be freed and
         * schedule the call back again.
         *
         * This happens when there are 2 CPUs. One could be freeing and the
         * other filling it. If the ring is full when we get out of here and
         * the card has already interrupted the host then the host can miss the
         * interrupt.
         *
         * There is still a possible race condition and the host could miss an
         * interrupt. The card has to take care of this.
         */
	hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
	done = (sw_consumer == hw_consumer);

	spin_unlock(&tx_ring->tx_clean_lock);

	return done;
}

Contributors
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Sony Chacko 279 84.80% 3 42.86%
Himanshu Madhani 42 12.77% 3 42.86%
Shahed Shaikh 8 2.43% 1 14.29%
Total 329 100.00% 7 100.00%



static int qlcnic_poll(struct napi_struct *napi, int budget)
{
	int tx_complete, work_done;
	struct qlcnic_host_sds_ring *sds_ring;
	struct qlcnic_adapter *adapter;
	struct qlcnic_host_tx_ring *tx_ring;

	sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
	adapter = sds_ring->adapter;
	tx_ring = sds_ring->tx_ring;

	tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring,
					      budget);
	work_done = qlcnic_process_rcv_ring(sds_ring, budget);

	/* Check if we need a repoll */
	if (!tx_complete)
		work_done = budget;

	if (work_done < budget) {
		napi_complete_done(&sds_ring->napi, work_done);
		if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
			qlcnic_enable_sds_intr(adapter, sds_ring);
			qlcnic_enable_tx_intr(adapter, tx_ring);
		}
	}

	return work_done;
}

Contributors
Person Tokens Prop Commits CommitProp
Sony Chacko 101 73.72% 3 42.86%
Himanshu Madhani 20 14.60% 1 14.29%
Shahed Shaikh 10 7.30% 1 14.29%
Eric Dumazet 3 2.19% 1 14.29%
Manish Chopra 3 2.19% 1 14.29%
Total 137 100.00% 7 100.00%



static int qlcnic_tx_poll(struct napi_struct *napi, int budget)
{
	struct qlcnic_host_tx_ring *tx_ring;
	struct qlcnic_adapter *adapter;
	int work_done;

	tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
	adapter = tx_ring->adapter;

	work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
	if (work_done) {
		napi_complete(&tx_ring->napi);
		if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
			qlcnic_enable_tx_intr(adapter, tx_ring);
	} else {
		/* As qlcnic_process_cmd_ring() returned 0, we need a repoll*/
		work_done = budget;
	}

	return work_done;
}

Contributors
Person Tokens Prop Commits CommitProp
Sony Chacko 77 77.00% 2 50.00%
Himanshu Madhani 15 15.00% 1 25.00%
Shahed Shaikh 8 8.00% 1 25.00%
Total 100 100.00% 4 100.00%



static int qlcnic_rx_poll(struct napi_struct *napi, int budget)
{
	struct qlcnic_host_sds_ring *sds_ring;
	struct qlcnic_adapter *adapter;
	int work_done;

	sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
	adapter = sds_ring->adapter;

	work_done = qlcnic_process_rcv_ring(sds_ring, budget);

	if (work_done < budget) {
		napi_complete_done(&sds_ring->napi, work_done);
		if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
			qlcnic_enable_sds_intr(adapter, sds_ring);
	}

	return work_done;
}

Contributors
Person Tokens Prop Commits CommitProp
Himanshu Madhani 79 84.04% 1 25.00%
Sony Chacko 9 9.57% 1 25.00%
Eric Dumazet 3 3.19% 1 25.00%
Manish Chopra 3 3.19% 1 25.00%
Total 94 100.00% 4 100.00%



static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
				    struct qlcnic_fw_msg *msg)
{
	u32 cable_OUI;
	u16 cable_len, link_speed;
	u8  link_status, module, duplex, autoneg, lb_status = 0;
	struct net_device *netdev = adapter->netdev;

	adapter->ahw->has_link_events = 1;

	cable_OUI = msg->body[1] & 0xffffffff;
	cable_len = (msg->body[1] >> 32) & 0xffff;
	link_speed = (msg->body[1] >> 48) & 0xffff;

	link_status = msg->body[2] & 0xff;
	duplex = (msg->body[2] >> 16) & 0xff;
	autoneg = (msg->body[2] >> 24) & 0xff;
	lb_status = (msg->body[2] >> 32) & 0x3;

	module = (msg->body[2] >> 8) & 0xff;
	if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE)
		dev_info(&netdev->dev,
			 "unsupported cable: OUI 0x%x, length %d\n",
			 cable_OUI, cable_len);
	else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN)
		dev_info(&netdev->dev, "unsupported cable length %d\n",
			 cable_len);

	if (!link_status && (lb_status == QLCNIC_ILB_MODE ||
	    lb_status == QLCNIC_ELB_MODE))
		adapter->ahw->loopback_state |= QLCNIC_LINKEVENT;

	qlcnic_advert_link_change(adapter, link_status);

	if (duplex == LINKEVENT_FULL_DUPLEX)
		adapter->ahw->link_duplex = DUPLEX_FULL;
	else
		adapter->ahw->link_duplex = DUPLEX_HALF;

	adapter->ahw->module_type = module;
	adapter->ahw->link_autoneg = autoneg;

	if (link_status) {
		adapter->ahw->link_speed = link_speed;
	} else {
		adapter->ahw->link_speed = SPEED_UNKNOWN;
		adapter->ahw->link_duplex = DUPLEX_UNKNOWN;
	}
}

Contributors
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Sony Chacko 282 91.86% 3 75.00%
Himanshu Madhani 25 8.14% 1 25.00%
Total 307 100.00% 4 100.00%



static void qlcnic_handle_fw_message(int desc_cnt, int index,
				     struct qlcnic_host_sds_ring *sds_ring)
{
	struct qlcnic_fw_msg msg;
	struct status_desc *desc;
	struct qlcnic_adapter *adapter;
	struct device *dev;
	int i = 0, opcode, ret;

	while (desc_cnt > 0 && i < 8) {
		desc = &sds_ring->desc_head[index];
		msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
		msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);

		index = get_next_index(index, sds_ring->num_desc);
		desc_cnt--;
	}

	adapter = sds_ring->adapter;
	dev = &adapter->pdev->dev;
	opcode = qlcnic_get_nic_msg_opcode(msg.body[0]);

	switch (opcode) {
	case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
		qlcnic_handle_linkevent(adapter, &msg);
		break;
	case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK:
		ret = (u32)(msg.body[1]);
		switch (ret) {
		case 0:
			adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE;
			break;
		case 1:
			dev_info(dev, "loopback already in progress\n");
			adapter->ahw->diag_cnt = -EINPROGRESS;
			break;
		case 2:
			dev_info(dev, "loopback cable is not connected\n");
			adapter->ahw->diag_cnt = -ENODEV;
			break;
		default:
			dev_info(dev,
				 "loopback configure request failed, err %x\n",
				 ret);
			adapter->ahw->diag_cnt = -EIO;
			break;
		}
		break;
	case QLCNIC_C2H_OPCODE_GET_DCB_AEN:
		qlcnic_dcb_aen_handler(adapter->dcb, (void *)&msg);
		break;
	default:
		break;
	}
}

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Total 278 100.00% 6 100.00%



static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
					    struct qlcnic_host_rds_ring *ring,
					    u16 index, u16 cksum)
{
	struct qlcnic_rx_buffer *buffer;
	struct sk_buff *skb;

	buffer = &ring->rx_buf_arr[index];
	if (unlikely(buffer->skb == NULL)) {
		WARN_ON(1);
		return NULL;
	}

	pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size,
			 PCI_DMA_FROMDEVICE);

	skb = buffer->skb;
	if (likely((adapter->netdev->features & NETIF_F_RXCSUM) &&
		   (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) {
		adapter->stats.csummed++;
		skb->ip_summed = CHECKSUM_UNNECESSARY;
	} else {
		skb_checksum_none_assert(skb);
	}


	buffer->skb = NULL;

	return skb;
}

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Stephen Hemminger 1 0.69% 1 33.33%
Total 145 100.00% 3 100.00%



static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter,
					  struct sk_buff *skb, u16 *vlan_tag)
{
	struct ethhdr *eth_hdr;

	if (!__vlan_get_tag(skb, vlan_tag)) {
		eth_hdr = (struct ethhdr *)skb->data;
		memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
		skb_pull(skb, VLAN_HLEN);
	}
	if (!adapter->rx_pvid)
		return 0;

	if (*vlan_tag == adapter->rx_pvid) {
		/* Outer vlan tag. Packet should follow non-vlan path */
		*vlan_tag = 0xffff;
		return 0;
	}
	if (adapter->flags & QLCNIC_TAGGING_ENABLED)
		return 0;

	return -EINVAL;
}

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Total 116 100.00% 2 100.00%


static struct qlcnic_rx_buffer *

qlcnic_process_rcv(struct qlcnic_adapter *adapter,
		   struct qlcnic_host_sds_ring *sds_ring, int ring,
		   u64 sts_data0)
{
	struct net_device *netdev = adapter->netdev;
	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
	struct qlcnic_rx_buffer *buffer;
	struct sk_buff *skb;
	struct qlcnic_host_rds_ring *rds_ring;
	int index, length, cksum, pkt_offset, is_lb_pkt;
	u16 vid = 0xffff, t_vid;

	if (unlikely(ring >= adapter->max_rds_rings))
		return NULL;

	rds_ring = &recv_ctx->rds_rings[ring];

	index = qlcnic_get_sts_refhandle(sts_data0);
	if (unlikely(index >= rds_ring->num_desc))
		return NULL;

	buffer = &rds_ring->rx_buf_arr[index];
	length = qlcnic_get_sts_totallength(sts_data0);
	cksum  = qlcnic_get_sts_status(sts_data0);
	pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);

	skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
	if (!skb)
		return buffer;

	if (adapter->rx_mac_learn) {
		t_vid = 0;
		is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
		qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
	}

	if (length > rds_ring->skb_size)
		skb_put(skb, rds_ring->skb_size);
	else
		skb_put(skb, length);

	if (pkt_offset)
		skb_pull(skb, pkt_offset);

	if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
		adapter->stats.rxdropped++;
		dev_kfree_skb(skb);
		return buffer;
	}

	skb->protocol = eth_type_trans(skb, netdev);

	if (vid != 0xffff)
		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);

	napi_gro_receive(&sds_ring->napi, skb);

	adapter->stats.rx_pkts++;
	adapter->stats.rxbytes += length;

	return buffer;
}

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Total 327 100.00% 4 100.00%


#define QLC_TCP_HDR_SIZE            20

#define QLC_TCP_TS_OPTION_SIZE      12

#define QLC_TCP_TS_HDR_SIZE         (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE)


static struct qlcnic_rx_buffer *

qlcnic_process_lro(struct qlcnic_adapter *adapter,
		   int ring, u64 sts_data0, u64 sts_data1)
{
	struct net_device *netdev = adapter->netdev;
	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
	struct qlcnic_rx_buffer *buffer;
	struct sk_buff *skb;
	struct qlcnic_host_rds_ring *rds_ring;
	struct iphdr *iph;
	struct ipv6hdr *ipv6h;
	struct tcphdr *th;
	bool push, timestamp;
	int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt;
	u16 lro_length, length, data_offset, t_vid, vid = 0xffff;
	u32 seq_number;

	if (unlikely(ring >= adapter->max_rds_rings))
		return NULL;

	rds_ring = &recv_ctx->rds_rings[ring];

	index = qlcnic_get_lro_sts_refhandle(sts_data0);
	if (unlikely(index >= rds_ring->num_desc))
		return NULL;

	buffer = &rds_ring->rx_buf_arr[index];

	timestamp = qlcnic_get_lro_sts_timestamp(sts_data0);
	lro_length = qlcnic_get_lro_sts_length(sts_data0);
	l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0);
	l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0);
	push = qlcnic_get_lro_sts_push_flag(sts_data0);
	seq_number = qlcnic_get_lro_sts_seq_number(sts_data1);

	skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
	if (!skb)
		return buffer;

	if (adapter->rx_mac_learn) {
		t_vid = 0;
		is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
		qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
	}

	if (timestamp)
		data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE;
	else
		data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE;

	skb_put(skb, lro_length + data_offset);
	skb_pull(skb, l2_hdr_offset);

	if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
		adapter->stats.rxdropped++;
		dev_kfree_skb(skb);
		return buffer;
	}

	skb->protocol = eth_type_trans(skb, netdev);

	if (ntohs(skb->protocol) == ETH_P_IPV6) {
		ipv6h = (struct ipv6hdr *)skb->data;
		th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
		length = (th->doff << 2) + lro_length;
		ipv6h->payload_len = htons(length);
	} else {
		iph = (struct iphdr *)skb->data;
		th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
		length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
		csum_replace2(&iph->check, iph->tot_len, htons(length));
		iph->tot_len = htons(length);
	}

	th->psh = push;
	th->seq = htonl(seq_number);
	length = skb->len;

	if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
		skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1);
		if (skb->protocol == htons(ETH_P_IPV6))
			skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
		else
			skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
	}

	if (vid != 0xffff)
		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
	netif_receive_skb(skb);

	adapter->stats.lro_pkts++;
	adapter->stats.lrobytes += length;

	return buffer;
}

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Michael S. Tsirkin 32 5.49% 1 10.00%
Li RongQing 12 2.06% 1 10.00%
Patrick McHardy 5 0.86% 1 10.00%
Manish Chopra 2 0.34% 1 10.00%
Total 583 100.00% 10 100.00%



static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max)
{
	struct qlcnic_host_rds_ring *rds_ring;
	struct qlcnic_adapter *adapter = sds_ring->adapter;
	struct list_head *cur;
	struct status_desc *desc;
	struct qlcnic_rx_buffer *rxbuf;
	int opcode, desc_cnt, count = 0;
	u64 sts_data0, sts_data1;
	u8 ring;
	u32 consumer = sds_ring->consumer;

	while (count < max) {
		desc = &sds_ring->desc_head[consumer];
		sts_data0 = le64_to_cpu(desc->status_desc_data[0]);

		if (!(sts_data0 & STATUS_OWNER_HOST))
			break;

		desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
		opcode = qlcnic_get_sts_opcode(sts_data0);
		switch (opcode) {
		case QLCNIC_RXPKT_DESC:
		case QLCNIC_OLD_RXPKT_DESC:
		case QLCNIC_SYN_OFFLOAD:
			ring = qlcnic_get_sts_type(sts_data0);
			rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring,
						   sts_data0);
			break;
		case QLCNIC_LRO_DESC:
			ring = qlcnic_get_lro_sts_type(sts_data0);
			sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
			rxbuf = qlcnic_process_lro(adapter, ring, sts_data0,
						   sts_data1);
			break;
		case QLCNIC_RESPONSE_DESC:
			qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
		default:
			goto skip;
		}
		WARN_ON(desc_cnt > 1);

		if (likely(rxbuf))
			list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
		else
			adapter->stats.null_rxbuf++;
skip:
		for (; desc_cnt > 0; desc_cnt--) {
			desc = &sds_ring->desc_head[consumer];
			desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW;
			consumer = get_next_index(consumer, sds_ring->num_desc);
		}
		count++;
	}

	for (ring = 0; ring < adapter->max_rds_rings; ring++) {
		rds_ring = &adapter->recv_ctx->rds_rings[ring];
		if (!list_empty(&sds_ring->free_list[ring])) {
			list_for_each(cur, &sds_ring->free_list[ring]) {
				rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
						   list);
				qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
			}
			spin_lock(&rds_ring->lock);
			list_splice_tail_init(&sds_ring->free_list[ring],
					      &rds_ring->free_list);
			spin_unlock(&rds_ring->lock);
		}

		qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
	}

	if (count) {
		sds_ring->consumer = consumer;
		writel(consumer, sds_ring->crb_sts_consumer);
	}

	return count;
}

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void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter,
			    struct qlcnic_host_rds_ring *rds_ring, u8 ring_id)
{
	struct rcv_desc *pdesc;
	struct qlcnic_rx_buffer *buffer;
	int count = 0;
	u32 producer, handle;
	struct list_head *head;

	producer = rds_ring->producer;
	head = &rds_ring->free_list;

	while (!list_empty(head)) {

		buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);

		if (!buffer->skb) {
			if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
				break;
		}

		count++;
		list_del(&buffer->list);

		/* make a rcv descriptor  */
		pdesc = &rds_ring->desc_head[producer];
		pdesc->addr_buffer = cpu_to_le64(buffer->dma);
		handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle,
					       ring_id);
		pdesc->reference_handle = cpu_to_le16(handle);
		pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
		producer = get_next_index(producer, rds_ring->num_desc);
	}

	if (count) {
		rds_ring->producer = producer;
		writel((producer-1) & (rds_ring->num_desc-1),
		       rds_ring->crb_rcv_producer);
	}
}

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static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter)
{
	if (adapter->ahw->msg_enable & NETIF_MSG_DRV) {
		char prefix[30];

		scnprintf(prefix, sizeof(prefix), "%s: %s: ",
			  dev_name(&adapter->pdev->dev), __func__);

		print_hex_dump_debug(prefix, DUMP_PREFIX_NONE, 16, 1,
				     skb->data, skb->len, true);
	}
}

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Total 79 100.00% 2 100.00%



static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring,
				    u64 sts_data0)
{
	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
	struct sk_buff *skb;
	struct qlcnic_host_rds_ring *rds_ring;
	int index, length, cksum, pkt_offset;

	if (unlikely(ring >= adapter->max_rds_rings))
		return;

	rds_ring = &recv_ctx->rds_rings[ring];

	index = qlcnic_get_sts_refhandle(sts_data0);
	length = qlcnic_get_sts_totallength(sts_data0);
	if (unlikely(index >= rds_ring->num_desc))
		return;

	cksum  = qlcnic_get_sts_status(sts_data0);
	pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);

	skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
	if (!skb)
		return;

	if (length > rds_ring->skb_size)
		skb_put(skb, rds_ring->skb_size);
	else
		skb_put(skb, length);

	if (pkt_offset)
		skb_pull(skb, pkt_offset);

	if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
		adapter->ahw->diag_cnt++;
	else
		dump_skb(skb, adapter);

	dev_kfree_skb_any(skb);
	adapter->stats.rx_pkts++;
	adapter->stats.rxbytes += length;

	return;
}

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void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
{
	struct qlcnic_adapter *adapter = sds_ring->adapter;
	struct status_desc *desc;
	u64 sts_data0;
	int ring, opcode, desc_cnt;

	u32 consumer = sds_ring->consumer;

	desc = &sds_ring->desc_head[consumer];
	sts_data0 = le64_to_cpu(desc->status_desc_data[0]);

	if (!(sts_data0 & STATUS_OWNER_HOST))
		return;

	desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
	opcode = qlcnic_get_sts_opcode(sts_data0);
	switch (opcode) {
	case QLCNIC_RESPONSE_DESC:
		qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
		break;
	default:
		ring = qlcnic_get_sts_type(sts_data0);
		qlcnic_process_rcv_diag(adapter, ring, sts_data0);
		break;
	}

	for (; desc_cnt > 0; desc_cnt--) {
		desc = &sds_ring->desc_head[consumer];
		desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
		consumer = get_next_index(consumer, sds_ring->num_desc);
	}

	sds_ring->consumer = consumer;
	writel(consumer, sds_ring->crb_sts_consumer);
}

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int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter,
			 struct net_device *netdev)
{
	int ring;
	struct qlcnic_host_sds_ring *sds_ring;
	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
	struct qlcnic_host_tx_ring *tx_ring;

	if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
		return -ENOMEM;

	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
		sds_ring = &recv_ctx->sds_rings[ring];
		if (qlcnic_check_multi_tx(adapter) &&
		    !adapter->ahw->diag_test) {
			netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll,
				       NAPI_POLL_WEIGHT);
		} else {
			if (ring == (adapter->drv_sds_rings - 1))
				netif_napi_add(netdev, &sds_ring->napi,
					       qlcnic_poll,
					       NAPI_POLL_WEIGHT);
			else
				netif_napi_add(netdev, &sds_ring->napi,
					       qlcnic_rx_poll,
					       NAPI_POLL_WEIGHT);
		}
	}

	if (qlcnic_alloc_tx_rings(adapter, netdev)) {
		qlcnic_free_sds_rings(recv_ctx);
		return -ENOMEM;
	}

	if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
			tx_ring = &adapter->tx_ring[ring];
			netif_tx_napi_add(netdev, &tx_ring->napi, qlcnic_tx_poll,
				       NAPI_POLL_WEIGHT);
		}
	}

	return 0;
}

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Total 233 100.00% 8 100.00%



void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter)
{
	int ring;
	struct qlcnic_host_sds_ring *sds_ring;
	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
	struct qlcnic_host_tx_ring *tx_ring;

	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
		sds_ring = &recv_ctx->sds_rings[ring];
		netif_napi_del(&sds_ring->napi);
	}

	qlcnic_free_sds_rings(adapter->recv_ctx);

	if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
			tx_ring = &adapter->tx_ring[ring];
			netif_napi_del(&tx_ring->napi);
		}
	}

	qlcnic_free_tx_rings(adapter);
}

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Total 130 100.00% 5 100.00%



void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter)
{
	int ring;
	struct qlcnic_host_sds_ring *sds_ring;
	struct qlcnic_host_tx_ring *tx_ring;
	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;

	if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
		return;

	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
		sds_ring = &recv_ctx->sds_rings[ring];
		napi_enable(&sds_ring->napi);
		qlcnic_enable_sds_intr(adapter, sds_ring);
	}

	if (qlcnic_check_multi_tx(adapter) &&
	    (adapter->flags & QLCNIC_MSIX_ENABLED) &&
	    !adapter->ahw->diag_test) {
		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
			tx_ring = &adapter->tx_ring[ring];
			napi_enable(&tx_ring->napi);
			qlcnic_enable_tx_intr(adapter, tx_ring);
		}
	}
}

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Total 149 100.00% 6 100.00%



void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter)
{
	int ring;
	struct qlcnic_host_sds_ring *sds_ring;
	struct qlcnic_host_tx_ring *tx_ring;
	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;

	if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
		return;

	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
		sds_ring = &recv_ctx->sds_rings[ring];
		qlcnic_disable_sds_intr(adapter, sds_ring);
		napi_synchronize(&sds_ring->napi);
		napi_disable(&sds_ring->napi);
	}

	if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
	    !adapter->ahw->diag_test &&
	    qlcnic_check_multi_tx(adapter)) {
		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
			tx_ring = &adapter->tx_ring[ring];
			qlcnic_disable_tx_intr(adapter, tx_ring);
			napi_synchronize(&tx_ring->napi);
			napi_disable(&tx_ring->napi);
		}
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Sony Chacko 82 49.70% 2 33.33%
Himanshu Madhani 79 47.88% 3 50.00%
Manish Chopra 4 2.42% 1 16.67%
Total 165 100.00% 6 100.00%


#define QLC_83XX_NORMAL_LB_PKT	(1ULL << 36)

#define QLC_83XX_LRO_LB_PKT	(1ULL << 46)



static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt)
{
	if (lro_pkt)
		return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0;
	else
		return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0;
}

Contributors
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Shahed Shaikh 40 100.00% 1 100.00%
Total 40 100.00% 1 100.00%


#define QLCNIC_ENCAP_LENGTH_MASK	0x7f



static inline u8 qlcnic_encap_length(u64 sts_data)
{
	return sts_data & QLCNIC_ENCAP_LENGTH_MASK;
}

Contributors
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Shahed Shaikh 15 100.00% 1 100.00%
Total 15 100.00% 1 100.00%


static struct qlcnic_rx_buffer *

qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter,
			struct qlcnic_host_sds_ring *sds_ring,
			u8 ring, u64 sts_data[])
{
	struct net_device *netdev = adapter->netdev;
	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
	struct qlcnic_rx_buffer *buffer;
	struct sk_buff *skb;
	struct qlcnic_host_rds_ring *rds_ring;
	int index, length, cksum, is_lb_pkt;
	u16 vid = 0xffff;
	int err;

	if (unlikely(ring >= adapter->max_rds_rings))
		return NULL;

	rds_ring = &recv_ctx->rds_rings[ring];

	index = qlcnic_83xx_hndl(sts_data[0]);
	if (unlikely(index >= rds_ring->num_desc))
		return NULL;

	buffer = &rds_ring->rx_buf_arr[index];
	length = qlcnic_83xx_pktln(sts_data[0]);
	cksum  = qlcnic_83xx_csum_status(sts_data[1]);
	skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
	if (!skb)
		return buffer;

	if (length > rds_ring->skb_size)
		skb_put(skb, rds_ring->skb_size);
	else
		skb_put(skb, length);

	err = qlcnic_check_rx_tagging(adapter, skb, &vid);

	if (adapter->rx_mac_learn) {
		is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0);
		qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
	}

	if (unlikely(err)) {
		adapter->stats.rxdropped++;
		dev_kfree_skb(skb);
		return buffer;
	}

	skb->protocol = eth_type_trans(skb, netdev);

	if (qlcnic_encap_length(sts_data[1]) &&
	    skb->ip_summed == CHECKSUM_UNNECESSARY) {
		skb->csum_level = 1;
		adapter->stats.encap_rx_csummed++;
	}

	if (vid != 0xffff)
		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);

	napi_gro_receive(&sds_ring->napi, skb);

	adapter->stats.rx_pkts++;
	adapter->stats.rxbytes += length;

	return buffer;
}

Contributors
Person Tokens Prop Commits CommitProp
Sony Chacko 275 77.68% 1 16.67%
Sucheta Chakraborty 41 11.58% 1 16.67%
Shahed Shaikh 32 9.04% 2 33.33%
Patrick McHardy 5 1.41% 1 16.67%
Tom Herbert 1 0.28% 1 16.67%
Total 354 100.00% 6 100.00%


static struct qlcnic_rx_buffer *

qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter,
			u8 ring, u64 sts_data[])
{
	struct net_device *netdev = adapter->netdev;
	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
	struct qlcnic_rx_buffer *buffer;
	struct sk_buff *skb;
	struct qlcnic_host_rds_ring *rds_ring;
	struct iphdr *iph;
	struct ipv6hdr *ipv6h;
	struct tcphdr *th;
	bool push;
	int l2_hdr_offset, l4_hdr_offset;
	int index, is_lb_pkt;
	u16 lro_length, length, data_offset, gso_size;
	u16 vid = 0xffff;
	int err;

	if (unlikely(ring >= adapter->max_rds_rings))
		return NULL;

	rds_ring = &recv_ctx->rds_rings[ring];

	index = qlcnic_83xx_hndl(sts_data[0]);
	if (unlikely(index >= rds_ring->num_desc))
		return NULL;

	buffer = &rds_ring->rx_buf_arr[index];

	lro_length = qlcnic_83xx_lro_pktln(sts_data[0]);
	l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]);
	l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]);
	push = qlcnic_83xx_is_psh_bit(sts_data[1]);

	skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
	if (!skb)
		return buffer;

	if (qlcnic_83xx_is_tstamp(sts_data[1]))
		data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE;
	else
		data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE;

	skb_put(skb, lro_length + data_offset);
	skb_pull(skb, l2_hdr_offset);

	err = qlcnic_check_rx_tagging(adapter, skb, &vid);

	if (adapter->rx_mac_learn) {
		is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1);
		qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
	}

	if (unlikely(err)) {
		adapter->stats.rxdropped++;
		dev_kfree_skb(skb);
		return buffer;
	}

	skb->protocol = eth_type_trans(skb, netdev);
	if (ntohs(skb->protocol) == ETH_P_IPV6) {
		ipv6h = (struct ipv6hdr *)skb->data;
		th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));

		length = (th->doff << 2) + lro_length;
		ipv6h->payload_len = htons(length);
	} else {
		iph = (struct iphdr *)skb->data;
		th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
		length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
		csum_replace2(&iph->check, iph->tot_len, htons(length));
		iph->tot_len = htons(length);
	}

	th->psh = push;
	length = skb->len;

	if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
		gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]);
		skb_shinfo(skb)->gso_size = gso_size;
		if (skb->protocol == htons(ETH_P_IPV6))
			skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
		else
			skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
	}

	if (vid != 0xffff)
		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);

	netif_receive_skb(skb);

	adapter->stats.lro_pkts++;
	adapter->stats.lrobytes += length;
	return buffer;
}

Contributors
Person Tokens Prop Commits CommitProp
Sony Chacko 468 79.19% 1 14.29%
Shahed Shaikh 63 10.66% 2 28.57%
Sucheta Chakraborty 41 6.94% 1 14.29%
Li RongQing 12 2.03% 1 14.29%
Patrick McHardy 5 0.85% 1 14.29%
Manish Chopra 2 0.34% 1 14.29%
Total 591 100.00% 7 100.00%



static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
					int max)
{
	struct qlcnic_host_rds_ring *rds_ring;
	struct qlcnic_adapter *adapter = sds_ring->adapter;
	struct list_head *cur;
	struct status_desc *desc;
	struct qlcnic_rx_buffer *rxbuf = NULL;
	u8 ring;
	u64 sts_data[2];
	int count = 0, opcode;
	u32 consumer = sds_ring->consumer;

	while (count < max) {
		desc = &sds_ring->desc_head[consumer];
		sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
		opcode = qlcnic_83xx_opcode(sts_data[1]);
		if (!opcode)
			break;
		sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
		ring = QLCNIC_FETCH_RING_ID(sts_data[0]);

		switch (opcode) {
		case QLC_83XX_REG_DESC:
			rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring,
							ring, sts_data);
			break;
		case QLC_83XX_LRO_DESC:
			rxbuf = qlcnic_83xx_process_lro(adapter, ring,
							sts_data);
			break;
		default:
			dev_info(&adapter->pdev->dev,
				 "Unknown opcode: 0x%x\n", opcode);
			goto skip;
		}

		if (likely(rxbuf))
			list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
		else
			adapter->stats.null_rxbuf++;
skip:
		desc = &sds_ring->desc_head[consumer];
		/* Reset the descriptor */
		desc->status_desc_data[1] = 0;
		consumer = get_next_index(consumer, sds_ring->num_desc);
		count++;
	}
	for (ring = 0; ring < adapter->max_rds_rings; ring++) {
		rds_ring = &adapter->recv_ctx->rds_rings[ring];
		if (!list_empty(&sds_ring->free_list[ring])) {
			list_for_each(cur, &sds_ring->free_list[ring]) {
				rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
						   list);
				qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
			}
			spin_lock(&rds_ring->lock);
			list_splice_tail_init(&sds_ring->free_list[ring],
					      &rds_ring->free_list);
			spin_unlock(&rds_ring->lock);
		}
		qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
	}
	if (count) {
		sds_ring->consumer = consumer;
		writel(consumer, sds_ring->crb_sts_consumer);
	}
	return count;
}

Contributors
Person Tokens Prop Commits CommitProp
Sony Chacko 403 99.75% 1 50.00%
Masanari Iida 1 0.25% 1 50.00%
Total 404 100.00% 2 100.00%



static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget)
{
	int tx_complete;
	int work_done;
	struct qlcnic_host_sds_ring *sds_ring;
	struct qlcnic_adapter *adapter;
	struct qlcnic_host_tx_ring *tx_ring;

	sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
	adapter = sds_ring->adapter;
	/* tx ring count = 1 */
	tx_ring = adapter->tx_ring;

	tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
	work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);

	/* Check if we need a repoll */
	if (!tx_complete)
		work_done = budget;

	if (work_done < budget) {
		napi_complete_done(&sds_ring->napi, work_done);
		qlcnic_enable_sds_intr(adapter, sds_ring);
	}

	return work_done;
}

Contributors
Person Tokens Prop Commits CommitProp
Rajesh K Borundia 104 88.14% 1 25.00%
Shahed Shaikh 10 8.47% 1 25.00%
Eric Dumazet 3 2.54% 1 25.00%
Manish Chopra 1 0.85% 1 25.00%
Total 118 100.00% 4 100.00%



static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)
{
	int tx_complete;
	int work_done;
	struct qlcnic_host_sds_ring *sds_ring;
	struct qlcnic_adapter *adapter;
	struct qlcnic_host_tx_ring *tx_ring;

	sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
	adapter = sds_ring->adapter;
	/* tx ring count = 1 */
	tx_ring = adapter->tx_ring;

	tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
	work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);

	/* Check if we need a repoll */
	if (!tx_complete)
		work_done = budget;

	if (work_done < budget) {
		napi_complete_done(&sds_ring->napi, work_done);
		qlcnic_enable_sds_intr(adapter, sds_ring);
	}

	return work_done;
}

Contributors
Person Tokens Prop Commits CommitProp
Sony Chacko 104 88.14% 1 25.00%
Shahed Shaikh 10 8.47% 1 25.00%
Eric Dumazet 3 2.54% 1 25.00%
Manish Chopra 1 0.85% 1 25.00%
Total 118 100.00% 4 100.00%



static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget)
{
	int work_done;
	struct qlcnic_host_tx_ring *tx_ring;
	struct qlcnic_adapter *adapter;

	tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
	adapter = tx_ring->adapter;
	work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
	if (work_done) {
		napi_complete(&tx_ring->napi);
		if (test_bit(__QLCNIC_DEV_UP , &adapter->state))
			qlcnic_enable_tx_intr(adapter, tx_ring);
	} else {
		/* need a repoll */
		work_done = budget;
	}

	return work_done;
}

Contributors
Person Tokens Prop Commits CommitProp
Sony Chacko 91 91.00% 1 33.33%
Shahed Shaikh 8 8.00% 1 33.33%
Manish Chopra 1 1.00% 1 33.33%
Total 100 100.00% 3 100.00%



static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget)
{
	int work_done;
	struct qlcnic_host_sds_ring *sds_ring;
	struct qlcnic_adapter *adapter;

	sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
	adapter = sds_ring->adapter;
	work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
	if (work_done < budget) {
		napi_complete_done(&sds_ring->napi, work_done);
		if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
			qlcnic_enable_sds_intr(adapter, sds_ring);
	}

	return work_done;
}

Contributors
Person Tokens Prop Commits CommitProp
Sony Chacko 90 95.74% 1 33.33%
Eric Dumazet 3 3.19% 1 33.33%
Manish Chopra 1 1.06% 1 33.33%
Total 94 100.00% 3 100.00%



void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter)
{
	int ring;
	struct qlcnic_host_sds_ring *sds_ring;
	struct qlcnic_host_tx_ring *tx_ring;
	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;

	if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
		return;

	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
		sds_ring = &recv_ctx->sds_rings[ring];
		napi_enable(&sds_ring->napi);
		if (adapter->flags & QLCNIC_MSIX_ENABLED)
			qlcnic_enable_sds_intr(adapter, sds_ring);
	}

	if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
	    !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
			tx_ring = &adapter->tx_ring[ring];
			napi_enable(&tx_ring->napi);
			qlcnic_enable_tx_intr(adapter, tx_ring);
		}
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Sony Chacko 131 85.06% 1 20.00%
Rajesh K Borundia 11 7.14% 1 20.00%
Himanshu Madhani 10 6.49% 2 40.00%
Manish Chopra 2 1.30% 1 20.00%
Total 154 100.00% 5 100.00%



void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter)
{
	int ring;
	struct qlcnic_host_sds_ring *sds_ring;
	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
	struct qlcnic_host_tx_ring *tx_ring;

	if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
		return;

	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
		sds_ring = &recv_ctx->sds_rings[ring];
		if (adapter->flags & QLCNIC_MSIX_ENABLED)
			qlcnic_disable_sds_intr(adapter, sds_ring);
		napi_synchronize(&sds_ring->napi);
		napi_disable(&sds_ring->napi);
	}

	if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
	    !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
			tx_ring = &adapter->tx_ring[ring];
			qlcnic_disable_tx_intr(adapter, tx_ring);
			napi_synchronize(&tx_ring->napi);
			napi_disable(&tx_ring->napi);
		}
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Sony Chacko 146 85.88% 1 20.00%
Himanshu Madhani 11 6.47% 2 40.00%
Rajesh K Borundia 11 6.47% 1 20.00%
Manish Chopra 2 1.18% 1 20.00%
Total 170 100.00% 5 100.00%



int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter,
			 struct net_device *netdev)
{
	int ring;
	struct qlcnic_host_sds_ring *sds_ring;
	struct qlcnic_host_tx_ring *tx_ring;
	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;

	if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
		return -ENOMEM;

	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
		sds_ring = &recv_ctx->sds_rings[ring];
		if (adapter->flags & QLCNIC_MSIX_ENABLED) {
			if (!(adapter->flags & QLCNIC_TX_INTR_SHARED))
				netif_napi_add(netdev, &sds_ring->napi,
					       qlcnic_83xx_rx_poll,
					       NAPI_POLL_WEIGHT);
			else
				netif_napi_add(netdev, &sds_ring->napi,
					       qlcnic_83xx_msix_sriov_vf_poll,
					       NAPI_POLL_WEIGHT);

		} else {
			netif_napi_add(netdev, &sds_ring->napi,
				       qlcnic_83xx_poll,
				       NAPI_POLL_WEIGHT);
		}
	}

	if (qlcnic_alloc_tx_rings(adapter, netdev)) {
		qlcnic_free_sds_rings(recv_ctx);
		return -ENOMEM;
	}

	if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
	    !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
			tx_ring = &adapter->tx_ring[ring];
			netif_tx_napi_add(netdev, &tx_ring->napi,
				       qlcnic_83xx_msix_tx_poll,
				       NAPI_POLL_WEIGHT);
		}
	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Sony Chacko 183 79.22% 1 20.00%
Rajesh K Borundia 40 17.32% 1 20.00%
Michal Schmidt 4 1.73% 1 20.00%
Himanshu Madhani 3 1.30% 1 20.00%
Eric Dumazet 1 0.43% 1 20.00%
Total 231 100.00% 5 100.00%



void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter)
{
	int ring;
	struct qlcnic_host_sds_ring *sds_ring;
	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
	struct qlcnic_host_tx_ring *tx_ring;

	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
		sds_ring = &recv_ctx->sds_rings[ring];
		netif_napi_del(&sds_ring->napi);
	}

	qlcnic_free_sds_rings(adapter->recv_ctx);

	if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
	    !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
			tx_ring = &adapter->tx_ring[ring];
			netif_napi_del(&tx_ring->napi);
		}
	}

	qlcnic_free_tx_rings(adapter);
}

Contributors
Person Tokens Prop Commits CommitProp
Sony Chacko 124 91.85% 1 33.33%
Rajesh K Borundia 9 6.67% 1 33.33%
Himanshu Madhani 2 1.48% 1 33.33%
Total 135 100.00% 3 100.00%



static void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter,
					 int ring, u64 sts_data[])
{
	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
	struct sk_buff *skb;
	struct qlcnic_host_rds_ring *rds_ring;
	int index, length;

	if (unlikely(ring >= adapter->max_rds_rings))
		return;

	rds_ring = &recv_ctx->rds_rings[ring];
	index = qlcnic_83xx_hndl(sts_data[0]);
	if (unlikely(index >= rds_ring->num_desc))
		return;

	length = qlcnic_83xx_pktln(sts_data[0]);

	skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
	if (!skb)
		return;

	if (length > rds_ring->skb_size)
		skb_put(skb, rds_ring->skb_size);
	else
		skb_put(skb, length);

	if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
		adapter->ahw->diag_cnt++;
	else
		dump_skb(skb, adapter);

	dev_kfree_skb_any(skb);
	return;
}

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Sony Chacko 174 99.43% 1 50.00%
Stephen Hemminger 1 0.57% 1 50.00%
Total 175 100.00% 2 100.00%



void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
{
	struct qlcnic_adapter *adapter = sds_ring->adapter;
	struct status_desc *desc;
	u64 sts_data[2];
	int ring, opcode;
	u32 consumer = sds_ring->consumer;

	desc = &sds_ring->desc_head[consumer];
	sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
	sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
	opcode = qlcnic_83xx_opcode(sts_data[1]);
	if (!opcode)
		return;

	ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
	qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data);
	desc = &sds_ring->desc_head[consumer];
	desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
	consumer = get_next_index(consumer, sds_ring->num_desc);
	sds_ring->consumer = consumer;
	writel(consumer, sds_ring->crb_sts_consumer);
}
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Sony Chacko 165 100.00% 1 100.00%
Total 165 100.00% 1 100.00%

Overall Contributors
Person Tokens Prop Commits CommitProp
Sony Chacko 8867 75.96% 7 13.46%
Shahed Shaikh 1578 13.52% 11 21.15%
Himanshu Madhani 564 4.83% 5 9.62%
Sucheta Chakraborty 234 2.00% 3 5.77%
Rajesh K Borundia 195 1.67% 5 9.62%
Joe Perches 53 0.45% 1 1.92%
Manish Chopra 43 0.37% 4 7.69%
Michael S. Tsirkin 32 0.27% 1 1.92%
Li RongQing 27 0.23% 1 1.92%
Patrick McHardy 20 0.17% 1 1.92%
Stephen Hemminger 18 0.15% 1 1.92%
Eric Dumazet 17 0.15% 2 3.85%
Michal Schmidt 8 0.07% 1 1.92%
Ding Tianhong 6 0.05% 2 3.85%
Jitendra Kalsaria 5 0.04% 3 5.77%
Jiri Pirko 4 0.03% 1 1.92%
Tom Herbert 1 0.01% 1 1.92%
Masanari Iida 1 0.01% 1 1.92%
Sritej Velaga 1 0.01% 1 1.92%
Total 11674 100.00% 52 100.00%
Directory: drivers/net/ethernet/qlogic/qlcnic

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Sony Chacko	32	78.05%	1	50.00%
Sucheta Chakraborty	9	21.95%	1	50.00%
Total	41	100.00%	2	100.00%
cregit-Linux how code gets into the kernel

Release 4.11 drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c

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