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IB/usnic: Add UDP support to usnic_fwd.[hc]

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Add *ip field* to *struct usnic_fwd_dev* as well as new *functions* to
manipulate the *ip field.*  Furthermore, add new functions for
programming UDP flows in the forwarding device.

Signed-off-by: Upinder Malhi <umalhi@cisco.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Upinder Malhi 2014-01-09 14:48:15 -08:00 committed by Roland Dreier
parent b85caf479b
commit 3f92bed3d6
2 changed files with 75 additions and 0 deletions
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54
drivers/infiniband/hw/usnic/usnic_fwd.c
View file

@ -95,6 +95,29 @@ void usnic_fwd_set_mac(struct usnic_fwd_dev *ufdev, char mac[ETH_ALEN])
spin_unlock(&ufdev->lock);
}
int usnic_fwd_add_ipaddr(struct usnic_fwd_dev *ufdev, __be32 inaddr)
{
int status;
spin_lock(&ufdev->lock);
if (ufdev->inaddr == 0) {
ufdev->inaddr = inaddr;
status = 0;
} else {
status = -EFAULT;
}
spin_unlock(&ufdev->lock);
return status;
}
void usnic_fwd_del_ipaddr(struct usnic_fwd_dev *ufdev)
{
spin_lock(&ufdev->lock);
ufdev->inaddr = 0;
spin_unlock(&ufdev->lock);
}
void usnic_fwd_carrier_up(struct usnic_fwd_dev *ufdev)
{
spin_lock(&ufdev->lock);
@ -126,6 +149,30 @@ static int usnic_fwd_dev_ready_locked(struct usnic_fwd_dev *ufdev)
return 0;
}
static int validate_filter_locked(struct usnic_fwd_dev *ufdev,
struct filter *filter)
{
lockdep_assert_held(&ufdev->lock);
if (filter->type == FILTER_IPV4_5TUPLE) {
if (!(filter->u.ipv4.flags & FILTER_FIELD_5TUP_DST_AD))
return -EACCES;
if (!(filter->u.ipv4.flags & FILTER_FIELD_5TUP_DST_PT))
return -EBUSY;
else if (ufdev->inaddr == 0)
return -EINVAL;
else if (filter->u.ipv4.dst_port == 0)
return -ERANGE;
else if (ntohl(ufdev->inaddr) != filter->u.ipv4.dst_addr)
return -EFAULT;
else
return 0;
}
return 0;
}
static void fill_tlv(struct filter_tlv *tlv, struct filter *filter,
struct filter_action *action)
{
@ -177,6 +224,13 @@ usnic_fwd_alloc_flow(struct usnic_fwd_dev *ufdev, struct filter *filter,
goto out_free_tlv;
}
status = validate_filter_locked(ufdev, filter);
if (status) {
usnic_err("Failed to validate filter with status %d\n",
status);
goto out_free_tlv;
}
/* Issue Devcmd */
a0 = tlv_pa;
a1 = tlv_size;

21
drivers/infiniband/hw/usnic/usnic_fwd.h
View file

@ -40,6 +40,7 @@ struct usnic_fwd_dev {
bool link_up;
char mac[ETH_ALEN];
unsigned int mtu;
__be32 inaddr;
char name[IFNAMSIZ+1];
};
@ -58,6 +59,8 @@ struct usnic_fwd_dev *usnic_fwd_dev_alloc(struct pci_dev *pdev);
void usnic_fwd_dev_free(struct usnic_fwd_dev *ufdev);
void usnic_fwd_set_mac(struct usnic_fwd_dev *ufdev, char mac[ETH_ALEN]);
int usnic_fwd_add_ipaddr(struct usnic_fwd_dev *ufdev, __be32 inaddr);
void usnic_fwd_del_ipaddr(struct usnic_fwd_dev *ufdev);
void usnic_fwd_carrier_up(struct usnic_fwd_dev *ufdev);
void usnic_fwd_carrier_down(struct usnic_fwd_dev *ufdev);
void usnic_fwd_set_mtu(struct usnic_fwd_dev *ufdev, unsigned int mtu);
@ -89,4 +92,22 @@ static inline void usnic_fwd_init_usnic_filter(struct filter *filter,
filter->u.usnic.usnic_id = usnic_id;
}
static inline void usnic_fwd_init_udp_filter(struct filter *filter,
uint32_t daddr, uint16_t dport)
{
filter->type = FILTER_IPV4_5TUPLE;
filter->u.ipv4.flags = FILTER_FIELD_5TUP_PROTO;
filter->u.ipv4.protocol = PROTO_UDP;
if (daddr) {
filter->u.ipv4.flags |= FILTER_FIELD_5TUP_DST_AD;
filter->u.ipv4.dst_addr = daddr;
}
if (dport) {
filter->u.ipv4.flags |= FILTER_FIELD_5TUP_DST_PT;
filter->u.ipv4.dst_port = dport;
}
}
#endif /* !USNIC_FWD_H_ */