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/kernel.h> |
16 | #include <linux/slab.h> |
17 | #include <linux/qed/qed_if.h> |
18 | |
19 | enum qed_ll2_conn_type { |
20 | QED_LL2_TYPE_FCOE, |
21 | QED_LL2_TYPE_TCP_ULP, |
22 | QED_LL2_TYPE_TEST, |
23 | QED_LL2_TYPE_OOO, |
24 | QED_LL2_TYPE_RESERVED2, |
25 | QED_LL2_TYPE_ROCE, |
26 | QED_LL2_TYPE_IWARP, |
27 | QED_LL2_TYPE_RESERVED3, |
28 | MAX_QED_LL2_CONN_TYPE |
29 | }; |
30 | |
31 | enum qed_ll2_rx_conn_type { |
32 | QED_LL2_RX_TYPE_LEGACY, |
33 | QED_LL2_RX_TYPE_CTX, |
34 | MAX_QED_LL2_RX_CONN_TYPE |
35 | }; |
36 | |
37 | enum qed_ll2_roce_flavor_type { |
38 | QED_LL2_ROCE, |
39 | QED_LL2_RROCE, |
40 | MAX_QED_LL2_ROCE_FLAVOR_TYPE |
41 | }; |
42 | |
43 | enum qed_ll2_tx_dest { |
44 | QED_LL2_TX_DEST_NW, /* Light L2 TX Destination to the Network */ |
45 | QED_LL2_TX_DEST_LB, /* Light L2 TX Destination to the Loopback */ |
46 | QED_LL2_TX_DEST_DROP, /* Light L2 Drop the TX packet */ |
47 | QED_LL2_TX_DEST_MAX |
48 | }; |
49 | |
50 | enum qed_ll2_error_handle { |
51 | QED_LL2_DROP_PACKET, |
52 | QED_LL2_DO_NOTHING, |
53 | QED_LL2_ASSERT, |
54 | }; |
55 | |
56 | struct qed_ll2_stats { |
57 | u64 gsi_invalid_hdr; |
58 | u64 gsi_invalid_pkt_length; |
59 | u64 gsi_unsupported_pkt_typ; |
60 | u64 gsi_crcchksm_error; |
61 | |
62 | u64 packet_too_big_discard; |
63 | u64 no_buff_discard; |
64 | |
65 | u64 rcv_ucast_bytes; |
66 | u64 rcv_mcast_bytes; |
67 | u64 rcv_bcast_bytes; |
68 | u64 rcv_ucast_pkts; |
69 | u64 rcv_mcast_pkts; |
70 | u64 rcv_bcast_pkts; |
71 | |
72 | u64 sent_ucast_bytes; |
73 | u64 sent_mcast_bytes; |
74 | u64 sent_bcast_bytes; |
75 | u64 sent_ucast_pkts; |
76 | u64 sent_mcast_pkts; |
77 | u64 sent_bcast_pkts; |
78 | }; |
79 | |
80 | struct qed_ll2_comp_rx_data { |
81 | void *cookie; |
82 | dma_addr_t rx_buf_addr; |
83 | u16 parse_flags; |
84 | u16 err_flags; |
85 | u16 vlan; |
86 | bool b_last_packet; |
87 | u8 connection_handle; |
88 | |
89 | union { |
90 | u16 packet_length; |
91 | u16 data_length; |
92 | } length; |
93 | |
94 | u32 opaque_data_0; |
95 | u32 opaque_data_1; |
96 | |
97 | /* GSI only */ |
98 | u32 src_qp; |
99 | u16 qp_id; |
100 | |
101 | union { |
102 | u8 placement_offset; |
103 | u8 data_length_error; |
104 | } u; |
105 | }; |
106 | |
107 | typedef |
108 | void (*qed_ll2_complete_rx_packet_cb)(void *cxt, |
109 | struct qed_ll2_comp_rx_data *data); |
110 | |
111 | typedef |
112 | void (*qed_ll2_release_rx_packet_cb)(void *cxt, |
113 | u8 connection_handle, |
114 | void *cookie, |
115 | dma_addr_t rx_buf_addr, |
116 | bool b_last_packet); |
117 | |
118 | typedef |
119 | void (*qed_ll2_complete_tx_packet_cb)(void *cxt, |
120 | u8 connection_handle, |
121 | void *cookie, |
122 | dma_addr_t first_frag_addr, |
123 | bool b_last_fragment, |
124 | bool b_last_packet); |
125 | |
126 | typedef |
127 | void (*qed_ll2_release_tx_packet_cb)(void *cxt, |
128 | u8 connection_handle, |
129 | void *cookie, |
130 | dma_addr_t first_frag_addr, |
131 | bool b_last_fragment, bool b_last_packet); |
132 | |
133 | typedef |
134 | void (*qed_ll2_slowpath_cb)(void *cxt, u8 connection_handle, |
135 | u32 opaque_data_0, u32 opaque_data_1); |
136 | |
137 | struct qed_ll2_cbs { |
138 | qed_ll2_complete_rx_packet_cb rx_comp_cb; |
139 | qed_ll2_release_rx_packet_cb rx_release_cb; |
140 | qed_ll2_complete_tx_packet_cb tx_comp_cb; |
141 | qed_ll2_release_tx_packet_cb tx_release_cb; |
142 | qed_ll2_slowpath_cb slowpath_cb; |
143 | void *cookie; |
144 | }; |
145 | |
146 | struct qed_ll2_acquire_data_inputs { |
147 | enum qed_ll2_rx_conn_type rx_conn_type; |
148 | enum qed_ll2_conn_type conn_type; |
149 | u16 mtu; |
150 | u16 rx_num_desc; |
151 | u16 rx_num_ooo_buffers; |
152 | u8 rx_drop_ttl0_flg; |
153 | u8 rx_vlan_removal_en; |
154 | u16 tx_num_desc; |
155 | u8 tx_max_bds_per_packet; |
156 | u8 tx_tc; |
157 | enum qed_ll2_tx_dest tx_dest; |
158 | enum qed_ll2_error_handle ai_err_packet_too_big; |
159 | enum qed_ll2_error_handle ai_err_no_buf; |
160 | bool secondary_queue; |
161 | u8 gsi_enable; |
162 | }; |
163 | |
164 | struct qed_ll2_acquire_data { |
165 | struct qed_ll2_acquire_data_inputs input; |
166 | const struct qed_ll2_cbs *cbs; |
167 | |
168 | /* Output container for LL2 connection's handle */ |
169 | u8 *p_connection_handle; |
170 | }; |
171 | |
172 | struct qed_ll2_tx_pkt_info { |
173 | void *cookie; |
174 | dma_addr_t first_frag; |
175 | enum qed_ll2_tx_dest tx_dest; |
176 | enum qed_ll2_roce_flavor_type qed_roce_flavor; |
177 | u16 vlan; |
178 | u16 l4_hdr_offset_w; /* from start of packet */ |
179 | u16 first_frag_len; |
180 | u8 num_of_bds; |
181 | u8 bd_flags; |
182 | bool enable_ip_cksum; |
183 | bool enable_l4_cksum; |
184 | bool calc_ip_len; |
185 | bool remove_stag; |
186 | }; |
187 | |
188 | #define QED_LL2_UNUSED_HANDLE (0xff) |
189 | |
190 | struct qed_ll2_cb_ops { |
191 | int (*rx_cb)(void *, struct sk_buff *, u32, u32); |
192 | int (*tx_cb)(void *, struct sk_buff *, bool); |
193 | }; |
194 | |
195 | struct qed_ll2_params { |
196 | u16 mtu; |
197 | bool drop_ttl0_packets; |
198 | bool rx_vlan_stripping; |
199 | u8 tx_tc; |
200 | bool frags_mapped; |
201 | u8 ll2_mac_address[ETH_ALEN]; |
202 | }; |
203 | |
204 | enum qed_ll2_xmit_flags { |
205 | /* FIP discovery packet */ |
206 | QED_LL2_XMIT_FLAGS_FIP_DISCOVERY |
207 | }; |
208 | |
209 | struct qed_ll2_ops { |
210 | /** |
211 | * start(): Initializes ll2. |
212 | * |
213 | * @cdev: Qed dev pointer. |
214 | * @params: Protocol driver configuration for the ll2. |
215 | * |
216 | * Return: 0 on success, otherwise error value. |
217 | */ |
218 | int (*start)(struct qed_dev *cdev, struct qed_ll2_params *params); |
219 | |
220 | /** |
221 | * stop(): Stops the ll2 |
222 | * |
223 | * @cdev: Qed dev pointer. |
224 | * |
225 | * Return: 0 on success, otherwise error value. |
226 | */ |
227 | int (*stop)(struct qed_dev *cdev); |
228 | |
229 | /** |
230 | * start_xmit(): Transmits an skb over the ll2 interface |
231 | * |
232 | * @cdev: Qed dev pointer. |
233 | * @skb: SKB. |
234 | * @xmit_flags: Transmit options defined by the enum qed_ll2_xmit_flags. |
235 | * |
236 | * Return: 0 on success, otherwise error value. |
237 | */ |
238 | int (*start_xmit)(struct qed_dev *cdev, struct sk_buff *skb, |
239 | unsigned long xmit_flags); |
240 | |
241 | /** |
242 | * register_cb_ops(): Protocol driver register the callback for Rx/Tx |
243 | * packets. Should be called before `start'. |
244 | * |
245 | * @cdev: Qed dev pointer. |
246 | * @cookie: to be passed to the callback functions. |
247 | * @ops: the callback functions to register for Rx / Tx. |
248 | * |
249 | * Return: 0 on success, otherwise error value. |
250 | */ |
251 | void (*register_cb_ops)(struct qed_dev *cdev, |
252 | const struct qed_ll2_cb_ops *ops, |
253 | void *cookie); |
254 | |
255 | /** |
256 | * get_stats(): Get LL2 related statistics. |
257 | * |
258 | * @cdev: Qed dev pointer. |
259 | * @stats: Pointer to struct that would be filled with stats. |
260 | * |
261 | * Return: 0 on success, error otherwise. |
262 | */ |
263 | int (*get_stats)(struct qed_dev *cdev, struct qed_ll2_stats *stats); |
264 | }; |
265 | |
266 | #ifdef CONFIG_QED_LL2 |
267 | int qed_ll2_alloc_if(struct qed_dev *); |
268 | void qed_ll2_dealloc_if(struct qed_dev *); |
269 | #else |
270 | static const struct qed_ll2_ops qed_ll2_ops_pass = { |
271 | .start = NULL, |
272 | .stop = NULL, |
273 | .start_xmit = NULL, |
274 | .register_cb_ops = NULL, |
275 | .get_stats = NULL, |
276 | }; |
277 | |
278 | static inline int qed_ll2_alloc_if(struct qed_dev *cdev) |
279 | { |
280 | return 0; |
281 | } |
282 | |
283 | static inline void qed_ll2_dealloc_if(struct qed_dev *cdev) |
284 | { |
285 | } |
286 | #endif |
287 | #endif |
288 | |