1/*
2 * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
3 *
4 * This program is free software; you may redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
9 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
10 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
11 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
12 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
13 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
14 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
15 * SOFTWARE.
16 *
17 */
18
19#ifndef USNIC_FWD_H_
20#define USNIC_FWD_H_
21
22#include <linux/if.h>
23#include <linux/netdevice.h>
24#include <linux/pci.h>
25#include <linux/in.h>
26
27#include "usnic_abi.h"
28#include "usnic_common_pkt_hdr.h"
29#include "vnic_devcmd.h"
30
31struct usnic_fwd_dev {
32	struct pci_dev			*pdev;
33	struct net_device		*netdev;
34	spinlock_t			lock;
35	/*
36	 * The following fields can be read directly off the device.
37	 * However, they should be set by a accessor function, except name,
38	 * which cannot be changed.
39	 */
40	bool				link_up;
41	char				mac[ETH_ALEN];
42	unsigned int			mtu;
43	__be32				inaddr;
44	char				name[IFNAMSIZ+1];
45};
46
47struct usnic_fwd_flow {
48	uint32_t			flow_id;
49	struct usnic_fwd_dev		*ufdev;
50	unsigned int			vnic_idx;
51};
52
53struct usnic_filter_action {
54	int				vnic_idx;
55	struct filter_action		action;
56};
57
58struct usnic_fwd_dev *usnic_fwd_dev_alloc(struct pci_dev *pdev);
59void usnic_fwd_dev_free(struct usnic_fwd_dev *ufdev);
60
61void usnic_fwd_set_mac(struct usnic_fwd_dev *ufdev, char mac[ETH_ALEN]);
62int usnic_fwd_add_ipaddr(struct usnic_fwd_dev *ufdev, __be32 inaddr);
63void usnic_fwd_del_ipaddr(struct usnic_fwd_dev *ufdev);
64void usnic_fwd_carrier_up(struct usnic_fwd_dev *ufdev);
65void usnic_fwd_carrier_down(struct usnic_fwd_dev *ufdev);
66void usnic_fwd_set_mtu(struct usnic_fwd_dev *ufdev, unsigned int mtu);
67
68/*
69 * Allocate a flow on this forwarding device. Whoever calls this function,
70 * must monitor netdev events on ufdev's netdevice. If NETDEV_REBOOT or
71 * NETDEV_DOWN is seen, flow will no longer function and must be
72 * immediately freed by calling usnic_dealloc_flow.
73 */
74struct usnic_fwd_flow*
75usnic_fwd_alloc_flow(struct usnic_fwd_dev *ufdev, struct filter *filter,
76				struct usnic_filter_action *action);
77int usnic_fwd_dealloc_flow(struct usnic_fwd_flow *flow);
78int usnic_fwd_enable_qp(struct usnic_fwd_dev *ufdev, int vnic_idx, int qp_idx);
79int usnic_fwd_disable_qp(struct usnic_fwd_dev *ufdev, int vnic_idx, int qp_idx);
80
81static inline void usnic_fwd_init_usnic_filter(struct filter *filter,
82						uint32_t usnic_id)
83{
84	filter->type = FILTER_USNIC_ID;
85	filter->u.usnic.ethtype = USNIC_ROCE_ETHERTYPE;
86	filter->u.usnic.flags = FILTER_FIELD_USNIC_ETHTYPE |
87				FILTER_FIELD_USNIC_ID |
88				FILTER_FIELD_USNIC_PROTO;
89	filter->u.usnic.proto_version = (USNIC_ROCE_GRH_VER <<
90					 USNIC_ROCE_GRH_VER_SHIFT) |
91					 USNIC_PROTO_VER;
92	filter->u.usnic.usnic_id = usnic_id;
93}
94
95static inline void usnic_fwd_init_udp_filter(struct filter *filter,
96						uint32_t daddr, uint16_t dport)
97{
98	filter->type = FILTER_IPV4_5TUPLE;
99	filter->u.ipv4.flags = FILTER_FIELD_5TUP_PROTO;
100	filter->u.ipv4.protocol = PROTO_UDP;
101
102	if (daddr) {
103		filter->u.ipv4.flags |= FILTER_FIELD_5TUP_DST_AD;
104		filter->u.ipv4.dst_addr = daddr;
105	}
106
107	if (dport) {
108		filter->u.ipv4.flags |= FILTER_FIELD_5TUP_DST_PT;
109		filter->u.ipv4.dst_port = dport;
110	}
111}
112
113#endif /* !USNIC_FWD_H_ */
114