drivers/infiniband/hw/usnic/usnic_fwd.h

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