tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* QLogic qed NIC Driver
2 * Copyright (c) 2015-2017 QLogic Corporation
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 * OpenIB.org 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#ifndef _QED_LL2_IF_H
34#define _QED_LL2_IF_H
35
36#include <linux/types.h>
37#include <linux/interrupt.h>
38#include <linux/netdevice.h>
39#include <linux/pci.h>
40#include <linux/skbuff.h>
41#include <linux/version.h>
42#include <linux/kernel.h>
43#include <linux/slab.h>
44#include <linux/qed/qed_if.h>
45
46struct qed_ll2_stats {
47 u64 gsi_invalid_hdr;
48 u64 gsi_invalid_pkt_length;
49 u64 gsi_unsupported_pkt_typ;
50 u64 gsi_crcchksm_error;
51
52 u64 packet_too_big_discard;
53 u64 no_buff_discard;
54
55 u64 rcv_ucast_bytes;
56 u64 rcv_mcast_bytes;
57 u64 rcv_bcast_bytes;
58 u64 rcv_ucast_pkts;
59 u64 rcv_mcast_pkts;
60 u64 rcv_bcast_pkts;
61
62 u64 sent_ucast_bytes;
63 u64 sent_mcast_bytes;
64 u64 sent_bcast_bytes;
65 u64 sent_ucast_pkts;
66 u64 sent_mcast_pkts;
67 u64 sent_bcast_pkts;
68};
69
70#define QED_LL2_UNUSED_HANDLE (0xff)
71
72struct qed_ll2_cb_ops {
73 int (*rx_cb)(void *, struct sk_buff *, u32, u32);
74 int (*tx_cb)(void *, struct sk_buff *, bool);
75};
76
77struct qed_ll2_params {
78 u16 mtu;
79 bool drop_ttl0_packets;
80 bool rx_vlan_stripping;
81 u8 tx_tc;
82 bool frags_mapped;
83 u8 ll2_mac_address[ETH_ALEN];
84};
85
86struct qed_ll2_ops {
87/**
88 * @brief start - initializes ll2
89 *
90 * @param cdev
91 * @param params - protocol driver configuration for the ll2.
92 *
93 * @return 0 on success, otherwise error value.
94 */
95 int (*start)(struct qed_dev *cdev, struct qed_ll2_params *params);
96
97/**
98 * @brief stop - stops the ll2
99 *
100 * @param cdev
101 *
102 * @return 0 on success, otherwise error value.
103 */
104 int (*stop)(struct qed_dev *cdev);
105
106/**
107 * @brief start_xmit - transmits an skb over the ll2 interface
108 *
109 * @param cdev
110 * @param skb
111 *
112 * @return 0 on success, otherwise error value.
113 */
114 int (*start_xmit)(struct qed_dev *cdev, struct sk_buff *skb);
115
116/**
117 * @brief register_cb_ops - protocol driver register the callback for Rx/Tx
118 * packets. Should be called before `start'.
119 *
120 * @param cdev
121 * @param cookie - to be passed to the callback functions.
122 * @param ops - the callback functions to register for Rx / Tx.
123 *
124 * @return 0 on success, otherwise error value.
125 */
126 void (*register_cb_ops)(struct qed_dev *cdev,
127 const struct qed_ll2_cb_ops *ops,
128 void *cookie);
129
130/**
131 * @brief get LL2 related statistics
132 *
133 * @param cdev
134 * @param stats - pointer to struct that would be filled with stats
135 *
136 * @return 0 on success, error otherwise.
137 */
138 int (*get_stats)(struct qed_dev *cdev, struct qed_ll2_stats *stats);
139};
140
141#ifdef CONFIG_QED_LL2
142int qed_ll2_alloc_if(struct qed_dev *);
143void qed_ll2_dealloc_if(struct qed_dev *);
144#else
145static const struct qed_ll2_ops qed_ll2_ops_pass = {
146 .start = NULL,
147 .stop = NULL,
148 .start_xmit = NULL,
149 .register_cb_ops = NULL,
150 .get_stats = NULL,
151};
152
153static inline int qed_ll2_alloc_if(struct qed_dev *cdev)
154{
155 return 0;
156}
157
158static inline void qed_ll2_dealloc_if(struct qed_dev *cdev)
159{
160}
161#endif
162#endif