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cxgb3: Added private MAC address and provisioning packet handler for iSCSI 

This patch added support of private MAC address per port and provisioning
packet handler for iSCSI traffic only.

The above changes are isolated to the cxgb3 driver, independent of any scsi or iscsi driver changes.

Acked-by: Karen Xie <kxie@chelsio.com>
Acked-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: Rakesh Ranjan <rakesh@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Karen Xie 2009-10-08 09:11:05 +00:00 committed by David S. Miller
parent bcd5149ded
commit f14d42f314
3 changed files with 53 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/net/cxgb3/adapter.h
View File

@ -48,12 +48,27 @@
struct vlan_group;
struct adapter;
struct sge_qset;
struct port_info;
enum { /* rx_offload flags */
T3_RX_CSUM = 1 << 0,
T3_LRO = 1 << 1,
};
enum mac_idx_types {
LAN_MAC_IDX = 0,
SAN_MAC_IDX,
MAX_MAC_IDX
};
struct iscsi_config {
__u8 mac_addr[ETH_ALEN];
__u32 flags;
int (*send)(struct port_info *pi, struct sk_buff **skb);
int (*recv)(struct port_info *pi, struct sk_buff *skb);
};
struct port_info {
struct adapter *adapter;
struct vlan_group *vlan_grp;
@ -68,6 +83,7 @@ struct port_info {
struct net_device_stats netstats;
int activity;
__be32 iscsi_ipv4addr;
struct iscsi_config iscsic;
int link_fault; /* link fault was detected */
};

22
drivers/net/cxgb3/cxgb3_main.c
View File

@ -344,8 +344,10 @@ static void link_start(struct net_device *dev)
init_rx_mode(&rm, dev, dev->mc_list);
t3_mac_reset(mac);
t3_mac_set_num_ucast(mac, MAX_MAC_IDX);
t3_mac_set_mtu(mac, dev->mtu);
t3_mac_set_address(mac, 0, dev->dev_addr);
t3_mac_set_address(mac, LAN_MAC_IDX, dev->dev_addr);
t3_mac_set_address(mac, SAN_MAC_IDX, pi->iscsic.mac_addr);
t3_mac_set_rx_mode(mac, &rm);
t3_link_start(&pi->phy, mac, &pi->link_config);
t3_mac_enable(mac, MAC_DIRECTION_RX | MAC_DIRECTION_TX);
@ -903,6 +905,7 @@ static inline int offload_tx(struct t3cdev *tdev, struct sk_buff *skb)
static int write_smt_entry(struct adapter *adapter, int idx)
{
struct cpl_smt_write_req *req;
struct port_info *pi = netdev_priv(adapter->port[idx]);
struct sk_buff *skb = alloc_skb(sizeof(*req), GFP_KERNEL);
if (!skb)
@ -913,8 +916,8 @@ static int write_smt_entry(struct adapter *adapter, int idx)
OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SMT_WRITE_REQ, idx));
req->mtu_idx = NMTUS - 1; /* should be 0 but there's a T3 bug */
req->iff = idx;
memset(req->src_mac1, 0, sizeof(req->src_mac1));
memcpy(req->src_mac0, adapter->port[idx]->dev_addr, ETH_ALEN);
memcpy(req->src_mac1, pi->iscsic.mac_addr, ETH_ALEN);
skb->priority = 1;
offload_tx(&adapter->tdev, skb);
return 0;
@ -2516,7 +2519,7 @@ static int cxgb_set_mac_addr(struct net_device *dev, void *p)
return -EINVAL;
memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
t3_mac_set_address(&pi->mac, 0, dev->dev_addr);
t3_mac_set_address(&pi->mac, LAN_MAC_IDX, dev->dev_addr);
if (offload_running(adapter))
write_smt_entry(adapter, pi->port_id);
return 0;
@ -2654,7 +2657,7 @@ static void check_t3b2_mac(struct adapter *adapter)
struct cmac *mac = &p->mac;
t3_mac_set_mtu(mac, dev->mtu);
t3_mac_set_address(mac, 0, dev->dev_addr);
t3_mac_set_address(mac, LAN_MAC_IDX, dev->dev_addr);
cxgb_set_rxmode(dev);
t3_link_start(&p->phy, mac, &p->link_config);
t3_mac_enable(mac, MAC_DIRECTION_RX | MAC_DIRECTION_TX);
@ -3112,6 +3115,14 @@ static const struct net_device_ops cxgb_netdev_ops = {
#endif
};
static void __devinit cxgb3_init_iscsi_mac(struct net_device *dev)
{
struct port_info *pi = netdev_priv(dev);
memcpy(pi->iscsic.mac_addr, dev->dev_addr, ETH_ALEN);
pi->iscsic.mac_addr[3] |= 0x80;
}
static int __devinit init_one(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
@ -3270,6 +3281,9 @@ static int __devinit init_one(struct pci_dev *pdev,
goto out_free_dev;
}
for_each_port(adapter, i)
cxgb3_init_iscsi_mac(adapter->port[i]);
/* Driver's ready. Reflect it on LEDs */
t3_led_ready(adapter);

28
drivers/net/cxgb3/sge.c
View File

@ -1946,10 +1946,9 @@ static void restart_tx(struct sge_qset *qs)
* Check if the ARP request is probing the private IP address
* dedicated to iSCSI, generate an ARP reply if so.
*/
static void cxgb3_arp_process(struct adapter *adapter, struct sk_buff *skb)
static void cxgb3_arp_process(struct port_info *pi, struct sk_buff *skb)
{
struct net_device *dev = skb->dev;
struct port_info *pi;
struct arphdr *arp;
unsigned char *arp_ptr;
unsigned char *sha;
@ -1972,12 +1971,11 @@ static void cxgb3_arp_process(struct adapter *adapter, struct sk_buff *skb)
arp_ptr += dev->addr_len;
memcpy(&tip, arp_ptr, sizeof(tip));
pi = netdev_priv(dev);
if (tip != pi->iscsi_ipv4addr)
return;
arp_send(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha,
dev->dev_addr, sha);
pi->iscsic.mac_addr, sha);
}
@ -1986,6 +1984,19 @@ static inline int is_arp(struct sk_buff *skb)
return skb->protocol == htons(ETH_P_ARP);
}
static void cxgb3_process_iscsi_prov_pack(struct port_info *pi,
struct sk_buff *skb)
{
if (is_arp(skb)) {
cxgb3_arp_process(pi, skb);
return;
}
if (pi->iscsic.recv)
pi->iscsic.recv(pi, skb);
}
/**
* rx_eth - process an ingress ethernet packet
* @adap: the adapter
@ -2024,13 +2035,12 @@ static void rx_eth(struct adapter *adap, struct sge_rspq *rq,
vlan_gro_receive(&qs->napi, grp,
ntohs(p->vlan), skb);
else {
if (unlikely(pi->iscsi_ipv4addr &&
is_arp(skb))) {
if (unlikely(pi->iscsic.flags)) {
unsigned short vtag = ntohs(p->vlan) &
VLAN_VID_MASK;
skb->dev = vlan_group_get_device(grp,
vtag);
cxgb3_arp_process(adap, skb);
cxgb3_process_iscsi_prov_pack(pi, skb);
}
__vlan_hwaccel_rx(skb, grp, ntohs(p->vlan),
rq->polling);
@ -2041,8 +2051,8 @@ static void rx_eth(struct adapter *adap, struct sge_rspq *rq,
if (lro)
napi_gro_receive(&qs->napi, skb);
else {
if (unlikely(pi->iscsi_ipv4addr && is_arp(skb)))
cxgb3_arp_process(adap, skb);
if (unlikely(pi->iscsic.flags))
cxgb3_process_iscsi_prov_pack(pi, skb);
netif_receive_skb(skb);
}
} else