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linuxdebug/drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0-only
/*
* QLogic qlcnic NIC Driver
* Copyright (c) 2009-2013 QLogic Corporation
*/
#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 <linux/jiffies.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));
}
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;
}
static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data)
{
return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0;
}
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--;
}
}
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;
}
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);
}
}
void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr,
u16 vlan_id, struct qlcnic_host_tx_ring *tx_ring)
{
struct cmd_desc_type0 *hwdesc;
struct qlcnic_nic_req *req;
struct qlcnic_mac_req *mac_req;
struct qlcnic_vlan_req *vlan_req;
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();
}
static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
struct cmd_desc_type0 *first_desc,
struct sk_buff *skb,
struct qlcnic_host_tx_ring *tx_ring)
{
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 (time_is_before_jiffies(QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
qlcnic_change_filter(adapter, &src_addr,
vlan_id, tx_ring);
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, tx_ring);
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);
}
#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;
}
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, tag_vlan = 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);
tag_vlan = 1;
} else if (skb_vlan_tag_present(skb)) {
flags = QLCNIC_FLAGS_VLAN_OOB;
vlan_tci = skb_vlan_tag_get(skb);
tag_vlan = 1;
}
if (unlikely(adapter->tx_pvid)) {
if (tag_vlan && !(adapter->flags & QLCNIC_TAGGING_ENABLED))
return -EIO;
if (tag_vlan && (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_tcp_all_headers(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;
}
static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb,
struct qlcnic_cmd_buffer *pbuf)
{
struct qlcnic_skb_frag *nf;
skb_frag_t *frag;
int i, nr_frags;
dma_addr_t map;
nr_frags = skb_shinfo(skb)->nr_frags;
nf = &pbuf->frag_array[0];
map = dma_map_single(&pdev->dev, skb->data, skb_headlen(skb),
DMA_TO_DEVICE);
if (dma_mapping_error(&pdev->dev, 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];
dma_unmap_page(&pdev->dev, nf->dma, nf->length, DMA_TO_DEVICE);
}
nf = &pbuf->frag_array[0];
dma_unmap_single(&pdev->dev, nf->dma, skb_headlen(skb), DMA_TO_DEVICE);
out_err:
return -ENOMEM;
}
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];
dma_unmap_page(&pdev->dev, nf->dma, nf->length, DMA_TO_DEVICE);
}
nf = &pbuf->frag_array[0];
dma_unmap_single(&pdev->dev, nf->dma, skb_headlen(skb), DMA_TO_DEVICE);
pbuf->skb = NULL;
}
static inline void qlcnic_clear_cmddesc(u64 *desc)
{
desc[0] = 0ULL;
desc[2] = 0ULL;
desc[7] = 0ULL;
}
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_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;
}
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);
}
}
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 = dma_map_single(&pdev->dev, skb->data, rds_ring->dma_size,
DMA_FROM_DEVICE);
if (dma_mapping_error(&pdev->dev, dma)) {
adapter->stats.rx_dma_map_error++;
dev_kfree_skb_any(skb);
return -ENOMEM;
}
buffer->skb = skb;
buffer->dma = dma;
return 0;
}
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);
}
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];
dma_unmap_single(&pdev->dev, frag->dma, frag->length,
DMA_TO_DEVICE);
frag->dma = 0ULL;
for (i = 1; i < buffer->frag_count; i++) {
frag++;
dma_unmap_page(&pdev->dev, frag->dma,
frag->length, DMA_TO_DEVICE);
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;
}
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;
}
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;
}
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;
}
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;
}
}
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;
}
}
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;
}
dma_unmap_single(&adapter->pdev->dev, buffer->dma, ring->dma_size,
DMA_FROM_DEVICE);
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;
}
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;
}
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;
}
#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;
}
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);
goto skip;
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;
}
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);
}
}
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);
}
}
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;
}
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);
}
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);
} else {
if (ring == (adapter->drv_sds_rings - 1))
netif_napi_add(netdev, &sds_ring->napi,
qlcnic_poll);
else
netif_napi_add(netdev, &sds_ring->napi,
qlcnic_rx_poll);
}
}
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_napi_add_tx(netdev, &tx_ring->napi,
qlcnic_tx_poll);
}
}
return 0;
}
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);
}
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);
}
}
}
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);
}
}
}
#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;
}
#define QLCNIC_ENCAP_LENGTH_MASK 0x7f
static inline u8 qlcnic_encap_length(u64 sts_data)
{
return sts_data & QLCNIC_ENCAP_LENGTH_MASK;
}
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;
}
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;
}
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;
}
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;
}
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;
}
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;
}
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;
}
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);
}
}
}
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);
}
}
}
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);
else
netif_napi_add(netdev, &sds_ring->napi,
qlcnic_83xx_msix_sriov_vf_poll);
} else {
netif_napi_add(netdev, &sds_ring->napi,
qlcnic_83xx_poll);
}
}
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_napi_add_tx(netdev, &tx_ring->napi,
qlcnic_83xx_msix_tx_poll);
}
}
return 0;
}
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);
}
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;
}
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);
}