1 #ifndef _HFI1_VNIC_H
2 #define _HFI1_VNIC_H
3 /*
4 * Copyright(c) 2017 Intel Corporation.
5 *
6 * This file is provided under a dual BSD/GPLv2 license. When using or
7 * redistributing this file, you may do so under either license.
8 *
9 * GPL LICENSE SUMMARY
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * BSD LICENSE
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 *
26 * - Redistributions of source code must retain the above copyright
27 * notice, this list of conditions and the following disclaimer.
28 * - Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in
30 * the documentation and/or other materials provided with the
31 * distribution.
32 * - Neither the name of Intel Corporation nor the names of its
33 * contributors may be used to endorse or promote products derived
34 * from this software without specific prior written permission.
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
37 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
38 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
39 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
40 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
42 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
43 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
44 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
45 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
46 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
47 *
48 */
49
50 #include <rdma/opa_vnic.h>
51 #include "hfi.h"
52 #include "sdma.h"
53
54 #define HFI1_VNIC_MAX_TXQ 16
55 #define HFI1_VNIC_MAX_PAD 12
56
57 /* L4 header definitions */
58 #define HFI1_VNIC_L4_HDR_OFFSET OPA_VNIC_L2_HDR_LEN
59
60 #define HFI1_VNIC_GET_L4_HDR(data) \
61 (*((u16 *)((u8 *)(data) + HFI1_VNIC_L4_HDR_OFFSET)))
62
63 #define HFI1_VNIC_GET_VESWID(data) \
64 (HFI1_VNIC_GET_L4_HDR(data) & 0xFFF)
65
66 /* Service class */
67 #define HFI1_VNIC_SC_OFFSET_LOW 6
68 #define HFI1_VNIC_SC_OFFSET_HI 7
69 #define HFI1_VNIC_SC_SHIFT 4
70
71 #define HFI1_VNIC_MAX_QUEUE 16
72
73 /**
74 * struct hfi1_vnic_sdma - VNIC per Tx ring SDMA information
75 * @dd - device data pointer
76 * @sde - sdma engine
77 * @vinfo - vnic info pointer
78 * @wait - iowait structure
79 * @stx - sdma tx request
80 * @state - vnic Tx ring SDMA state
81 * @q_idx - vnic Tx queue index
82 */
83 struct hfi1_vnic_sdma {
84 struct hfi1_devdata *dd;
85 struct sdma_engine *sde;
86 struct hfi1_vnic_vport_info *vinfo;
87 struct iowait wait;
88 struct sdma_txreq stx;
89 unsigned int state;
90 u8 q_idx;
91 bool pkts_sent;
92 };
93
94 /**
95 * struct hfi1_vnic_rx_queue - HFI1 VNIC receive queue
96 * @idx: queue index
97 * @vinfo: pointer to vport information
98 * @netdev: network device
99 * @napi: netdev napi structure
100 * @skbq: queue of received socket buffers
101 */
102 struct hfi1_vnic_rx_queue {
103 u8 idx;
104 struct hfi1_vnic_vport_info *vinfo;
105 struct net_device *netdev;
106 struct napi_struct napi;
107 struct sk_buff_head skbq;
108 };
109
110 /**
111 * struct hfi1_vnic_vport_info - HFI1 VNIC virtual port information
112 * @dd: device data pointer
113 * @netdev: net device pointer
114 * @flags: state flags
115 * @lock: vport lock
116 * @num_tx_q: number of transmit queues
117 * @num_rx_q: number of receive queues
118 * @vesw_id: virtual switch id
119 * @rxq: Array of receive queues
120 * @stats: per queue stats
121 * @sdma: VNIC SDMA structure per TXQ
122 */
123 struct hfi1_vnic_vport_info {
124 struct hfi1_devdata *dd;
125 struct net_device *netdev;
126 unsigned long flags;
127
128 /* Lock used around state updates */
129 struct mutex lock;
130
131 u8 num_tx_q;
132 u8 num_rx_q;
133 u16 vesw_id;
134 struct hfi1_vnic_rx_queue rxq[HFI1_NUM_VNIC_CTXT];
135
136 struct opa_vnic_stats stats[HFI1_VNIC_MAX_QUEUE];
137 struct hfi1_vnic_sdma sdma[HFI1_VNIC_MAX_TXQ];
138 };
139
140 #define v_dbg(format, arg...) \
141 netdev_dbg(vinfo->netdev, format, ## arg)
142 #define v_err(format, arg...) \
143 netdev_err(vinfo->netdev, format, ## arg)
144 #define v_info(format, arg...) \
145 netdev_info(vinfo->netdev, format, ## arg)
146
147 /* vnic hfi1 internal functions */
148 void hfi1_vnic_setup(struct hfi1_devdata *dd);
149 void hfi1_vnic_cleanup(struct hfi1_devdata *dd);
150 int hfi1_vnic_txreq_init(struct hfi1_devdata *dd);
151 void hfi1_vnic_txreq_deinit(struct hfi1_devdata *dd);
152
153 void hfi1_vnic_bypass_rcv(struct hfi1_packet *packet);
154 void hfi1_vnic_sdma_init(struct hfi1_vnic_vport_info *vinfo);
155 bool hfi1_vnic_sdma_write_avail(struct hfi1_vnic_vport_info *vinfo,
156 u8 q_idx);
157
158 /* vnic rdma netdev operations */
159 struct net_device *hfi1_vnic_alloc_rn(struct ib_device *device,
160 u8 port_num,
161 enum rdma_netdev_t type,
162 const char *name,
163 unsigned char name_assign_type,
164 void (*setup)(struct net_device *));
165 int hfi1_vnic_send_dma(struct hfi1_devdata *dd, u8 q_idx,
166 struct hfi1_vnic_vport_info *vinfo,
167 struct sk_buff *skb, u64 pbc, u8 plen);
168
169 #endif /* _HFI1_VNIC_H */