1#ifndef _HFI1_VNIC_H
2#define _HFI1_VNIC_H
3/*
4 * Copyright(c) 2017 - 2020 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#define HFI1_NUM_VNIC_CTXT 8
73
74/**
75 * struct hfi1_vnic_sdma - VNIC per Tx ring SDMA information
76 * @dd - device data pointer
77 * @sde - sdma engine
78 * @vinfo - vnic info pointer
79 * @wait - iowait structure
80 * @stx - sdma tx request
81 * @state - vnic Tx ring SDMA state
82 * @q_idx - vnic Tx queue index
83 */
84struct hfi1_vnic_sdma {
85	struct hfi1_devdata *dd;
86	struct sdma_engine  *sde;
87	struct hfi1_vnic_vport_info *vinfo;
88	struct iowait wait;
89	struct sdma_txreq stx;
90	unsigned int state;
91	u8 q_idx;
92	bool pkts_sent;
93};
94
95/**
96 * struct hfi1_vnic_rx_queue - HFI1 VNIC receive queue
97 * @idx: queue index
98 * @vinfo: pointer to vport information
99 * @netdev: network device
100 * @napi: netdev napi structure
101 * @skbq: queue of received socket buffers
102 */
103struct hfi1_vnic_rx_queue {
104	u8                           idx;
105	struct hfi1_vnic_vport_info *vinfo;
106	struct net_device           *netdev;
107	struct napi_struct           napi;
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 */
123struct 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 */
148void hfi1_vnic_setup(struct hfi1_devdata *dd);
149int hfi1_vnic_txreq_init(struct hfi1_devdata *dd);
150void hfi1_vnic_txreq_deinit(struct hfi1_devdata *dd);
151
152void hfi1_vnic_bypass_rcv(struct hfi1_packet *packet);
153void hfi1_vnic_sdma_init(struct hfi1_vnic_vport_info *vinfo);
154bool hfi1_vnic_sdma_write_avail(struct hfi1_vnic_vport_info *vinfo,
155				u8 q_idx);
156
157/* vnic rdma netdev operations */
158struct net_device *hfi1_vnic_alloc_rn(struct ib_device *device,
159				      u8 port_num,
160				      enum rdma_netdev_t type,
161				      const char *name,
162				      unsigned char name_assign_type,
163				      void (*setup)(struct net_device *));
164int hfi1_vnic_send_dma(struct hfi1_devdata *dd, u8 q_idx,
165		       struct hfi1_vnic_vport_info *vinfo,
166		       struct sk_buff *skb, u64 pbc, u8 plen);
167
168#endif /* _HFI1_VNIC_H */
169