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Linux kernel mirror (for testing)
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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
46enum qed_ll2_conn_type {
47 QED_LL2_TYPE_FCOE,
48 QED_LL2_TYPE_ISCSI,
49 QED_LL2_TYPE_TEST,
50 QED_LL2_TYPE_OOO,
51 QED_LL2_TYPE_RESERVED2,
52 QED_LL2_TYPE_ROCE,
53 QED_LL2_TYPE_IWARP,
54 QED_LL2_TYPE_RESERVED3,
55 MAX_QED_LL2_RX_CONN_TYPE
56};
57
58enum qed_ll2_roce_flavor_type {
59 QED_LL2_ROCE,
60 QED_LL2_RROCE,
61 MAX_QED_LL2_ROCE_FLAVOR_TYPE
62};
63
64enum qed_ll2_tx_dest {
65 QED_LL2_TX_DEST_NW, /* Light L2 TX Destination to the Network */
66 QED_LL2_TX_DEST_LB, /* Light L2 TX Destination to the Loopback */
67 QED_LL2_TX_DEST_MAX
68};
69
70enum qed_ll2_error_handle {
71 QED_LL2_DROP_PACKET,
72 QED_LL2_DO_NOTHING,
73 QED_LL2_ASSERT,
74};
75
76struct qed_ll2_stats {
77 u64 gsi_invalid_hdr;
78 u64 gsi_invalid_pkt_length;
79 u64 gsi_unsupported_pkt_typ;
80 u64 gsi_crcchksm_error;
81
82 u64 packet_too_big_discard;
83 u64 no_buff_discard;
84
85 u64 rcv_ucast_bytes;
86 u64 rcv_mcast_bytes;
87 u64 rcv_bcast_bytes;
88 u64 rcv_ucast_pkts;
89 u64 rcv_mcast_pkts;
90 u64 rcv_bcast_pkts;
91
92 u64 sent_ucast_bytes;
93 u64 sent_mcast_bytes;
94 u64 sent_bcast_bytes;
95 u64 sent_ucast_pkts;
96 u64 sent_mcast_pkts;
97 u64 sent_bcast_pkts;
98};
99
100struct qed_ll2_comp_rx_data {
101 void *cookie;
102 dma_addr_t rx_buf_addr;
103 u16 parse_flags;
104 u16 vlan;
105 bool b_last_packet;
106 u8 connection_handle;
107
108 union {
109 u16 packet_length;
110 u16 data_length;
111 } length;
112
113 u32 opaque_data_0;
114 u32 opaque_data_1;
115
116 /* GSI only */
117 u32 gid_dst[4];
118 u16 qp_id;
119
120 union {
121 u8 placement_offset;
122 u8 data_length_error;
123 } u;
124};
125
126typedef
127void (*qed_ll2_complete_rx_packet_cb)(void *cxt,
128 struct qed_ll2_comp_rx_data *data);
129
130typedef
131void (*qed_ll2_release_rx_packet_cb)(void *cxt,
132 u8 connection_handle,
133 void *cookie,
134 dma_addr_t rx_buf_addr,
135 bool b_last_packet);
136
137typedef
138void (*qed_ll2_complete_tx_packet_cb)(void *cxt,
139 u8 connection_handle,
140 void *cookie,
141 dma_addr_t first_frag_addr,
142 bool b_last_fragment,
143 bool b_last_packet);
144
145typedef
146void (*qed_ll2_release_tx_packet_cb)(void *cxt,
147 u8 connection_handle,
148 void *cookie,
149 dma_addr_t first_frag_addr,
150 bool b_last_fragment, bool b_last_packet);
151
152struct qed_ll2_cbs {
153 qed_ll2_complete_rx_packet_cb rx_comp_cb;
154 qed_ll2_release_rx_packet_cb rx_release_cb;
155 qed_ll2_complete_tx_packet_cb tx_comp_cb;
156 qed_ll2_release_tx_packet_cb tx_release_cb;
157 void *cookie;
158};
159
160struct qed_ll2_acquire_data_inputs {
161 enum qed_ll2_conn_type conn_type;
162 u16 mtu;
163 u16 rx_num_desc;
164 u16 rx_num_ooo_buffers;
165 u8 rx_drop_ttl0_flg;
166 u8 rx_vlan_removal_en;
167 u16 tx_num_desc;
168 u8 tx_max_bds_per_packet;
169 u8 tx_tc;
170 enum qed_ll2_tx_dest tx_dest;
171 enum qed_ll2_error_handle ai_err_packet_too_big;
172 enum qed_ll2_error_handle ai_err_no_buf;
173 u8 gsi_enable;
174};
175
176struct qed_ll2_acquire_data {
177 struct qed_ll2_acquire_data_inputs input;
178 const struct qed_ll2_cbs *cbs;
179
180 /* Output container for LL2 connection's handle */
181 u8 *p_connection_handle;
182};
183
184struct qed_ll2_tx_pkt_info {
185 void *cookie;
186 dma_addr_t first_frag;
187 enum qed_ll2_tx_dest tx_dest;
188 enum qed_ll2_roce_flavor_type qed_roce_flavor;
189 u16 vlan;
190 u16 l4_hdr_offset_w; /* from start of packet */
191 u16 first_frag_len;
192 u8 num_of_bds;
193 u8 bd_flags;
194 bool enable_ip_cksum;
195 bool enable_l4_cksum;
196 bool calc_ip_len;
197};
198
199#define QED_LL2_UNUSED_HANDLE (0xff)
200
201struct qed_ll2_cb_ops {
202 int (*rx_cb)(void *, struct sk_buff *, u32, u32);
203 int (*tx_cb)(void *, struct sk_buff *, bool);
204};
205
206struct qed_ll2_params {
207 u16 mtu;
208 bool drop_ttl0_packets;
209 bool rx_vlan_stripping;
210 u8 tx_tc;
211 bool frags_mapped;
212 u8 ll2_mac_address[ETH_ALEN];
213};
214
215struct qed_ll2_ops {
216/**
217 * @brief start - initializes ll2
218 *
219 * @param cdev
220 * @param params - protocol driver configuration for the ll2.
221 *
222 * @return 0 on success, otherwise error value.
223 */
224 int (*start)(struct qed_dev *cdev, struct qed_ll2_params *params);
225
226/**
227 * @brief stop - stops the ll2
228 *
229 * @param cdev
230 *
231 * @return 0 on success, otherwise error value.
232 */
233 int (*stop)(struct qed_dev *cdev);
234
235/**
236 * @brief start_xmit - transmits an skb over the ll2 interface
237 *
238 * @param cdev
239 * @param skb
240 *
241 * @return 0 on success, otherwise error value.
242 */
243 int (*start_xmit)(struct qed_dev *cdev, struct sk_buff *skb);
244
245/**
246 * @brief register_cb_ops - protocol driver register the callback for Rx/Tx
247 * packets. Should be called before `start'.
248 *
249 * @param cdev
250 * @param cookie - to be passed to the callback functions.
251 * @param ops - the callback functions to register for Rx / Tx.
252 *
253 * @return 0 on success, otherwise error value.
254 */
255 void (*register_cb_ops)(struct qed_dev *cdev,
256 const struct qed_ll2_cb_ops *ops,
257 void *cookie);
258
259/**
260 * @brief get LL2 related statistics
261 *
262 * @param cdev
263 * @param stats - pointer to struct that would be filled with stats
264 *
265 * @return 0 on success, error otherwise.
266 */
267 int (*get_stats)(struct qed_dev *cdev, struct qed_ll2_stats *stats);
268};
269
270#ifdef CONFIG_QED_LL2
271int qed_ll2_alloc_if(struct qed_dev *);
272void qed_ll2_dealloc_if(struct qed_dev *);
273#else
274static const struct qed_ll2_ops qed_ll2_ops_pass = {
275 .start = NULL,
276 .stop = NULL,
277 .start_xmit = NULL,
278 .register_cb_ops = NULL,
279 .get_stats = NULL,
280};
281
282static inline int qed_ll2_alloc_if(struct qed_dev *cdev)
283{
284 return 0;
285}
286
287static inline void qed_ll2_dealloc_if(struct qed_dev *cdev)
288{
289}
290#endif
291#endif