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_ */