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_ */ 129