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_ */