LXR linux/drivers/infiniband/hw/usnic/usnic

   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
  46struct 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
  62struct usnic_fwd_flow {
  63        uint32_t                        flow_id;
  64        struct usnic_fwd_dev            *ufdev;
  65        unsigned int                    vnic_idx;
  66};
  67
  68struct usnic_filter_action {
  69        int                             vnic_idx;
  70        struct filter_action            action;
  71};
  72
  73struct usnic_fwd_dev *usnic_fwd_dev_alloc(struct pci_dev *pdev);
  74void usnic_fwd_dev_free(struct usnic_fwd_dev *ufdev);
  75
  76void usnic_fwd_set_mac(struct usnic_fwd_dev *ufdev, char mac[ETH_ALEN]);
  77int usnic_fwd_add_ipaddr(struct usnic_fwd_dev *ufdev, __be32 inaddr);
  78void usnic_fwd_del_ipaddr(struct usnic_fwd_dev *ufdev);
  79void usnic_fwd_carrier_up(struct usnic_fwd_dev *ufdev);
  80void usnic_fwd_carrier_down(struct usnic_fwd_dev *ufdev);
  81void 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 */
  89struct usnic_fwd_flow*
  90usnic_fwd_alloc_flow(struct usnic_fwd_dev *ufdev, struct filter *filter,
  91                                struct usnic_filter_action *action);
  92int usnic_fwd_dealloc_flow(struct usnic_fwd_flow *flow);
  93int usnic_fwd_enable_qp(struct usnic_fwd_dev *ufdev, int vnic_idx, int qp_idx);
  94int usnic_fwd_disable_qp(struct usnic_fwd_dev *ufdev, int vnic_idx, int qp_idx);
  95
  96static 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
 110static 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_ */
 129