GNU Linux-libre 4.9.287-gnu1
[releases.git] / drivers / infiniband / hw / usnic / usnic_fwd.h
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/pci.h>
40 #include <linux/in.h>
41
42 #include "usnic_abi.h"
43 #include "usnic_common_pkt_hdr.h"
44 #include "vnic_devcmd.h"
45
46 struct usnic_fwd_dev {
47         struct pci_dev                  *pdev;
48         struct net_device               *netdev;
49         spinlock_t                      lock;
50         /*
51          * The following fields can be read directly off the device.
52          * However, they should be set by a accessor function, except name,
53          * which cannot be changed.
54          */
55         bool                            link_up;
56         char                            mac[ETH_ALEN];
57         unsigned int                    mtu;
58         __be32                          inaddr;
59         char                            name[IFNAMSIZ+1];
60 };
61
62 struct usnic_fwd_flow {
63         uint32_t                        flow_id;
64         struct usnic_fwd_dev            *ufdev;
65         unsigned int                    vnic_idx;
66 };
67
68 struct usnic_filter_action {
69         int                             vnic_idx;
70         struct filter_action            action;
71 };
72
73 struct usnic_fwd_dev *usnic_fwd_dev_alloc(struct pci_dev *pdev);
74 void usnic_fwd_dev_free(struct usnic_fwd_dev *ufdev);
75
76 void usnic_fwd_set_mac(struct usnic_fwd_dev *ufdev, char mac[ETH_ALEN]);
77 int usnic_fwd_add_ipaddr(struct usnic_fwd_dev *ufdev, __be32 inaddr);
78 void usnic_fwd_del_ipaddr(struct usnic_fwd_dev *ufdev);
79 void usnic_fwd_carrier_up(struct usnic_fwd_dev *ufdev);
80 void usnic_fwd_carrier_down(struct usnic_fwd_dev *ufdev);
81 void usnic_fwd_set_mtu(struct usnic_fwd_dev *ufdev, unsigned int mtu);
82
83 /*
84  * Allocate a flow on this forwarding device. Whoever calls this function,
85  * must monitor netdev events on ufdev's netdevice. If NETDEV_REBOOT or
86  * NETDEV_DOWN is seen, flow will no longer function and must be
87  * immediately freed by calling usnic_dealloc_flow.
88  */
89 struct usnic_fwd_flow*
90 usnic_fwd_alloc_flow(struct usnic_fwd_dev *ufdev, struct filter *filter,
91                                 struct usnic_filter_action *action);
92 int usnic_fwd_dealloc_flow(struct usnic_fwd_flow *flow);
93 int usnic_fwd_enable_qp(struct usnic_fwd_dev *ufdev, int vnic_idx, int qp_idx);
94 int usnic_fwd_disable_qp(struct usnic_fwd_dev *ufdev, int vnic_idx, int qp_idx);
95
96 static inline void usnic_fwd_init_usnic_filter(struct filter *filter,
97                                                 uint32_t usnic_id)
98 {
99         filter->type = FILTER_USNIC_ID;
100         filter->u.usnic.ethtype = USNIC_ROCE_ETHERTYPE;
101         filter->u.usnic.flags = FILTER_FIELD_USNIC_ETHTYPE |
102                                 FILTER_FIELD_USNIC_ID |
103                                 FILTER_FIELD_USNIC_PROTO;
104         filter->u.usnic.proto_version = (USNIC_ROCE_GRH_VER <<
105                                          USNIC_ROCE_GRH_VER_SHIFT) |
106                                          USNIC_PROTO_VER;
107         filter->u.usnic.usnic_id = usnic_id;
108 }
109
110 static inline void usnic_fwd_init_udp_filter(struct filter *filter,
111                                                 uint32_t daddr, uint16_t dport)
112 {
113         filter->type = FILTER_IPV4_5TUPLE;
114         filter->u.ipv4.flags = FILTER_FIELD_5TUP_PROTO;
115         filter->u.ipv4.protocol = PROTO_UDP;
116
117         if (daddr) {
118                 filter->u.ipv4.flags |= FILTER_FIELD_5TUP_DST_AD;
119                 filter->u.ipv4.dst_addr = daddr;
120         }
121
122         if (dport) {
123                 filter->u.ipv4.flags |= FILTER_FIELD_5TUP_DST_PT;
124                 filter->u.ipv4.dst_port = dport;
125         }
126 }
127
128 #endif /* !USNIC_FWD_H_ */