tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
2/* QLogic qed NIC Driver
3 * Copyright (c) 2015-2017 QLogic Corporation
4 * Copyright (c) 2019-2020 Marvell International Ltd.
5 */
6
7#ifndef _QED_LL2_IF_H
8#define _QED_LL2_IF_H
9
10#include <linux/types.h>
11#include <linux/interrupt.h>
12#include <linux/netdevice.h>
13#include <linux/pci.h>
14#include <linux/skbuff.h>
15#include <linux/version.h>
16#include <linux/kernel.h>
17#include <linux/slab.h>
18#include <linux/qed/qed_if.h>
19
20enum qed_ll2_conn_type {
21 QED_LL2_TYPE_FCOE,
22 QED_LL2_TYPE_ISCSI,
23 QED_LL2_TYPE_TEST,
24 QED_LL2_TYPE_OOO,
25 QED_LL2_TYPE_RESERVED2,
26 QED_LL2_TYPE_ROCE,
27 QED_LL2_TYPE_IWARP,
28 QED_LL2_TYPE_RESERVED3,
29 MAX_QED_LL2_CONN_TYPE
30};
31
32enum qed_ll2_rx_conn_type {
33 QED_LL2_RX_TYPE_LEGACY,
34 QED_LL2_RX_TYPE_CTX,
35 MAX_QED_LL2_RX_CONN_TYPE
36};
37
38enum qed_ll2_roce_flavor_type {
39 QED_LL2_ROCE,
40 QED_LL2_RROCE,
41 MAX_QED_LL2_ROCE_FLAVOR_TYPE
42};
43
44enum qed_ll2_tx_dest {
45 QED_LL2_TX_DEST_NW, /* Light L2 TX Destination to the Network */
46 QED_LL2_TX_DEST_LB, /* Light L2 TX Destination to the Loopback */
47 QED_LL2_TX_DEST_DROP, /* Light L2 Drop the TX packet */
48 QED_LL2_TX_DEST_MAX
49};
50
51enum qed_ll2_error_handle {
52 QED_LL2_DROP_PACKET,
53 QED_LL2_DO_NOTHING,
54 QED_LL2_ASSERT,
55};
56
57struct qed_ll2_stats {
58 u64 gsi_invalid_hdr;
59 u64 gsi_invalid_pkt_length;
60 u64 gsi_unsupported_pkt_typ;
61 u64 gsi_crcchksm_error;
62
63 u64 packet_too_big_discard;
64 u64 no_buff_discard;
65
66 u64 rcv_ucast_bytes;
67 u64 rcv_mcast_bytes;
68 u64 rcv_bcast_bytes;
69 u64 rcv_ucast_pkts;
70 u64 rcv_mcast_pkts;
71 u64 rcv_bcast_pkts;
72
73 u64 sent_ucast_bytes;
74 u64 sent_mcast_bytes;
75 u64 sent_bcast_bytes;
76 u64 sent_ucast_pkts;
77 u64 sent_mcast_pkts;
78 u64 sent_bcast_pkts;
79};
80
81struct qed_ll2_comp_rx_data {
82 void *cookie;
83 dma_addr_t rx_buf_addr;
84 u16 parse_flags;
85 u16 err_flags;
86 u16 vlan;
87 bool b_last_packet;
88 u8 connection_handle;
89
90 union {
91 u16 packet_length;
92 u16 data_length;
93 } length;
94
95 u32 opaque_data_0;
96 u32 opaque_data_1;
97
98 /* GSI only */
99 u32 src_qp;
100 u16 qp_id;
101
102 union {
103 u8 placement_offset;
104 u8 data_length_error;
105 } u;
106};
107
108typedef
109void (*qed_ll2_complete_rx_packet_cb)(void *cxt,
110 struct qed_ll2_comp_rx_data *data);
111
112typedef
113void (*qed_ll2_release_rx_packet_cb)(void *cxt,
114 u8 connection_handle,
115 void *cookie,
116 dma_addr_t rx_buf_addr,
117 bool b_last_packet);
118
119typedef
120void (*qed_ll2_complete_tx_packet_cb)(void *cxt,
121 u8 connection_handle,
122 void *cookie,
123 dma_addr_t first_frag_addr,
124 bool b_last_fragment,
125 bool b_last_packet);
126
127typedef
128void (*qed_ll2_release_tx_packet_cb)(void *cxt,
129 u8 connection_handle,
130 void *cookie,
131 dma_addr_t first_frag_addr,
132 bool b_last_fragment, bool b_last_packet);
133
134typedef
135void (*qed_ll2_slowpath_cb)(void *cxt, u8 connection_handle,
136 u32 opaque_data_0, u32 opaque_data_1);
137
138struct qed_ll2_cbs {
139 qed_ll2_complete_rx_packet_cb rx_comp_cb;
140 qed_ll2_release_rx_packet_cb rx_release_cb;
141 qed_ll2_complete_tx_packet_cb tx_comp_cb;
142 qed_ll2_release_tx_packet_cb tx_release_cb;
143 qed_ll2_slowpath_cb slowpath_cb;
144 void *cookie;
145};
146
147struct qed_ll2_acquire_data_inputs {
148 enum qed_ll2_rx_conn_type rx_conn_type;
149 enum qed_ll2_conn_type conn_type;
150 u16 mtu;
151 u16 rx_num_desc;
152 u16 rx_num_ooo_buffers;
153 u8 rx_drop_ttl0_flg;
154 u8 rx_vlan_removal_en;
155 u16 tx_num_desc;
156 u8 tx_max_bds_per_packet;
157 u8 tx_tc;
158 enum qed_ll2_tx_dest tx_dest;
159 enum qed_ll2_error_handle ai_err_packet_too_big;
160 enum qed_ll2_error_handle ai_err_no_buf;
161 bool secondary_queue;
162 u8 gsi_enable;
163};
164
165struct qed_ll2_acquire_data {
166 struct qed_ll2_acquire_data_inputs input;
167 const struct qed_ll2_cbs *cbs;
168
169 /* Output container for LL2 connection's handle */
170 u8 *p_connection_handle;
171};
172
173struct qed_ll2_tx_pkt_info {
174 void *cookie;
175 dma_addr_t first_frag;
176 enum qed_ll2_tx_dest tx_dest;
177 enum qed_ll2_roce_flavor_type qed_roce_flavor;
178 u16 vlan;
179 u16 l4_hdr_offset_w; /* from start of packet */
180 u16 first_frag_len;
181 u8 num_of_bds;
182 u8 bd_flags;
183 bool enable_ip_cksum;
184 bool enable_l4_cksum;
185 bool calc_ip_len;
186 bool remove_stag;
187};
188
189#define QED_LL2_UNUSED_HANDLE (0xff)
190
191struct qed_ll2_cb_ops {
192 int (*rx_cb)(void *, struct sk_buff *, u32, u32);
193 int (*tx_cb)(void *, struct sk_buff *, bool);
194};
195
196struct qed_ll2_params {
197 u16 mtu;
198 bool drop_ttl0_packets;
199 bool rx_vlan_stripping;
200 u8 tx_tc;
201 bool frags_mapped;
202 u8 ll2_mac_address[ETH_ALEN];
203};
204
205enum qed_ll2_xmit_flags {
206 /* FIP discovery packet */
207 QED_LL2_XMIT_FLAGS_FIP_DISCOVERY
208};
209
210struct qed_ll2_ops {
211/**
212 * @brief start - initializes ll2
213 *
214 * @param cdev
215 * @param params - protocol driver configuration for the ll2.
216 *
217 * @return 0 on success, otherwise error value.
218 */
219 int (*start)(struct qed_dev *cdev, struct qed_ll2_params *params);
220
221/**
222 * @brief stop - stops the ll2
223 *
224 * @param cdev
225 *
226 * @return 0 on success, otherwise error value.
227 */
228 int (*stop)(struct qed_dev *cdev);
229
230/**
231 * @brief start_xmit - transmits an skb over the ll2 interface
232 *
233 * @param cdev
234 * @param skb
235 * @param xmit_flags - Transmit options defined by the enum qed_ll2_xmit_flags.
236 *
237 * @return 0 on success, otherwise error value.
238 */
239 int (*start_xmit)(struct qed_dev *cdev, struct sk_buff *skb,
240 unsigned long xmit_flags);
241
242/**
243 * @brief register_cb_ops - protocol driver register the callback for Rx/Tx
244 * packets. Should be called before `start'.
245 *
246 * @param cdev
247 * @param cookie - to be passed to the callback functions.
248 * @param ops - the callback functions to register for Rx / Tx.
249 *
250 * @return 0 on success, otherwise error value.
251 */
252 void (*register_cb_ops)(struct qed_dev *cdev,
253 const struct qed_ll2_cb_ops *ops,
254 void *cookie);
255
256/**
257 * @brief get LL2 related statistics
258 *
259 * @param cdev
260 * @param stats - pointer to struct that would be filled with stats
261 *
262 * @return 0 on success, error otherwise.
263 */
264 int (*get_stats)(struct qed_dev *cdev, struct qed_ll2_stats *stats);
265};
266
267#ifdef CONFIG_QED_LL2
268int qed_ll2_alloc_if(struct qed_dev *);
269void qed_ll2_dealloc_if(struct qed_dev *);
270#else
271static const struct qed_ll2_ops qed_ll2_ops_pass = {
272 .start = NULL,
273 .stop = NULL,
274 .start_xmit = NULL,
275 .register_cb_ops = NULL,
276 .get_stats = NULL,
277};
278
279static inline int qed_ll2_alloc_if(struct qed_dev *cdev)
280{
281 return 0;
282}
283
284static inline void qed_ll2_dealloc_if(struct qed_dev *cdev)
285{
286}
287#endif
288#endif