1/*
2 * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses.  You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * BSD license below:
9 *
10 *     Redistribution and use in source and binary forms, with or
11 *     without modification, are permitted provided that the following
12 *     conditions are met:
13 *
14 *      - Redistributions of source code must retain the above
15 *        copyright notice, this list of conditions and the following
16 *        disclaimer.
17 *
18 *      - Redistributions in binary form must reproduce the above
19 *        copyright notice, this list of conditions and the following
20 *        disclaimer in the documentation and/or other materials
21 *        provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 */
33
34#ifndef USNIC_FWD_H_
35#define USNIC_FWD_H_
36
37#include <linux/if.h>
38#include <linux/netdevice.h>
39#include <linux/if_ether.h>
40#include <linux/pci.h>
41#include <linux/in.h>
42
43#include "usnic_abi.h"
44#include "usnic_common_pkt_hdr.h"
45#include "vnic_devcmd.h"
46
47struct usnic_fwd_dev {
48	struct pci_dev			*pdev;
49	struct net_device		*netdev;
50	spinlock_t			lock;
51	/*
52	 * The following fields can be read directly off the device.
53	 * However, they should be set by a accessor function, except name,
54	 * which cannot be changed.
55	 */
56	bool				link_up;
57	char				mac[ETH_ALEN];
58	unsigned int			mtu;
59	__be32				inaddr;
60	char				name[IFNAMSIZ];
61};
62
63struct usnic_fwd_flow {
64	uint32_t			flow_id;
65	struct usnic_fwd_dev		*ufdev;
66	unsigned int			vnic_idx;
67};
68
69struct usnic_filter_action {
70	int				vnic_idx;
71	struct filter_action		action;
72};
73
74struct usnic_fwd_dev *usnic_fwd_dev_alloc(struct pci_dev *pdev);
75void usnic_fwd_dev_free(struct usnic_fwd_dev *ufdev);
76
77void usnic_fwd_set_mac(struct usnic_fwd_dev *ufdev, const char mac[ETH_ALEN]);
78void usnic_fwd_add_ipaddr(struct usnic_fwd_dev *ufdev, __be32 inaddr);
79void usnic_fwd_del_ipaddr(struct usnic_fwd_dev *ufdev);
80void usnic_fwd_carrier_up(struct usnic_fwd_dev *ufdev);
81void usnic_fwd_carrier_down(struct usnic_fwd_dev *ufdev);
82void usnic_fwd_set_mtu(struct usnic_fwd_dev *ufdev, unsigned int mtu);
83
84/*
85 * Allocate a flow on this forwarding device. Whoever calls this function,
86 * must monitor netdev events on ufdev's netdevice. If NETDEV_REBOOT or
87 * NETDEV_DOWN is seen, flow will no longer function and must be
88 * immediately freed by calling usnic_dealloc_flow.
89 */
90struct usnic_fwd_flow*
91usnic_fwd_alloc_flow(struct usnic_fwd_dev *ufdev, struct filter *filter,
92				struct usnic_filter_action *action);
93int usnic_fwd_dealloc_flow(struct usnic_fwd_flow *flow);
94int usnic_fwd_enable_qp(struct usnic_fwd_dev *ufdev, int vnic_idx, int qp_idx);
95int usnic_fwd_disable_qp(struct usnic_fwd_dev *ufdev, int vnic_idx, int qp_idx);
96
97static inline void usnic_fwd_init_usnic_filter(struct filter *filter,
98						uint32_t usnic_id)
99{
100	filter->type = FILTER_USNIC_ID;
101	filter->u.usnic.ethtype = ETH_P_IBOE;
102	filter->u.usnic.flags = FILTER_FIELD_USNIC_ETHTYPE |
103				FILTER_FIELD_USNIC_ID |
104				FILTER_FIELD_USNIC_PROTO;
105	filter->u.usnic.proto_version = (USNIC_ROCE_GRH_VER <<
106					 USNIC_ROCE_GRH_VER_SHIFT) |
107					 USNIC_PROTO_VER;
108	filter->u.usnic.usnic_id = usnic_id;
109}
110
111static inline void usnic_fwd_init_udp_filter(struct filter *filter,
112						uint32_t daddr, uint16_t dport)
113{
114	filter->type = FILTER_IPV4_5TUPLE;
115	filter->u.ipv4.flags = FILTER_FIELD_5TUP_PROTO;
116	filter->u.ipv4.protocol = PROTO_UDP;
117
118	if (daddr) {
119		filter->u.ipv4.flags |= FILTER_FIELD_5TUP_DST_AD;
120		filter->u.ipv4.dst_addr = daddr;
121	}
122
123	if (dport) {
124		filter->u.ipv4.flags |= FILTER_FIELD_5TUP_DST_PT;
125		filter->u.ipv4.dst_port = dport;
126	}
127}
128
129#endif /* !USNIC_FWD_H_ */
130