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_ISCSI_IF_H
8 #define _QED_ISCSI_IF_H
9 #include <linux/types.h>
10 #include <linux/qed/qed_if.h>
11
12 typedef int (*iscsi_event_cb_t) (void *context,
13 u8 fw_event_code, void *fw_handle);
14 struct qed_iscsi_stats {
15 u64 iscsi_rx_bytes_cnt;
16 u64 iscsi_rx_packet_cnt;
17 u64 iscsi_rx_new_ooo_isle_events_cnt;
18 u32 iscsi_cmdq_threshold_cnt;
19 u32 iscsi_rq_threshold_cnt;
20 u32 iscsi_immq_threshold_cnt;
21
22 u64 iscsi_rx_dropped_pdus_task_not_valid;
23
24 u64 iscsi_rx_data_pdu_cnt;
25 u64 iscsi_rx_r2t_pdu_cnt;
26 u64 iscsi_rx_total_pdu_cnt;
27
28 u64 iscsi_tx_go_to_slow_start_event_cnt;
29 u64 iscsi_tx_fast_retransmit_event_cnt;
30
31 u64 iscsi_tx_data_pdu_cnt;
32 u64 iscsi_tx_r2t_pdu_cnt;
33 u64 iscsi_tx_total_pdu_cnt;
34
35 u64 iscsi_tx_bytes_cnt;
36 u64 iscsi_tx_packet_cnt;
37 };
38
39 struct qed_dev_iscsi_info {
40 struct qed_dev_info common;
41
42 void __iomem *primary_dbq_rq_addr;
43 void __iomem *secondary_bdq_rq_addr;
44
45 u8 num_cqs;
46 };
47
48 struct qed_iscsi_id_params {
49 u8 mac[ETH_ALEN];
50 u32 ip[4];
51 u16 port;
52 };
53
54 struct qed_iscsi_params_offload {
55 u8 layer_code;
56 dma_addr_t sq_pbl_addr;
57 u32 initial_ack;
58
59 struct qed_iscsi_id_params src;
60 struct qed_iscsi_id_params dst;
61 u16 vlan_id;
62 u8 tcp_flags;
63 u8 ip_version;
64 u8 default_cq;
65
66 u8 ka_max_probe_cnt;
67 u8 dup_ack_theshold;
68 u32 rcv_next;
69 u32 snd_una;
70 u32 snd_next;
71 u32 snd_max;
72 u32 snd_wnd;
73 u32 rcv_wnd;
74 u32 snd_wl1;
75 u32 cwnd;
76 u32 ss_thresh;
77 u16 srtt;
78 u16 rtt_var;
79 u32 ts_recent;
80 u32 ts_recent_age;
81 u32 total_rt;
82 u32 ka_timeout_delta;
83 u32 rt_timeout_delta;
84 u8 dup_ack_cnt;
85 u8 snd_wnd_probe_cnt;
86 u8 ka_probe_cnt;
87 u8 rt_cnt;
88 u32 flow_label;
89 u32 ka_timeout;
90 u32 ka_interval;
91 u32 max_rt_time;
92 u32 initial_rcv_wnd;
93 u8 ttl;
94 u8 tos_or_tc;
95 u16 remote_port;
96 u16 local_port;
97 u16 mss;
98 u8 snd_wnd_scale;
99 u8 rcv_wnd_scale;
100 u16 da_timeout_value;
101 u8 ack_frequency;
102 };
103
104 struct qed_iscsi_params_update {
105 u8 update_flag;
106 #define QED_ISCSI_CONN_HD_EN BIT(0)
107 #define QED_ISCSI_CONN_DD_EN BIT(1)
108 #define QED_ISCSI_CONN_INITIAL_R2T BIT(2)
109 #define QED_ISCSI_CONN_IMMEDIATE_DATA BIT(3)
110
111 u32 max_seq_size;
112 u32 max_recv_pdu_length;
113 u32 max_send_pdu_length;
114 u32 first_seq_length;
115 u32 exp_stat_sn;
116 };
117
118 #define MAX_TID_BLOCKS_ISCSI (512)
119 struct qed_iscsi_tid {
120 u32 size; /* In bytes per task */
121 u32 num_tids_per_block;
122 u8 *blocks[MAX_TID_BLOCKS_ISCSI];
123 };
124
125 struct qed_iscsi_cb_ops {
126 struct qed_common_cb_ops common;
127 };
128
129 /**
130 * struct qed_iscsi_ops - qed iSCSI operations.
131 * @common: common operations pointer
132 * @ll2: light L2 operations pointer
133 * @fill_dev_info: fills iSCSI specific information
134 * @param cdev
135 * @param info
136 * @return 0 on success, otherwise error value.
137 * @register_ops: register iscsi operations
138 * @param cdev
139 * @param ops - specified using qed_iscsi_cb_ops
140 * @param cookie - driver private
141 * @start: iscsi in FW
142 * @param cdev
143 * @param tasks - qed will fill information about tasks
144 * return 0 on success, otherwise error value.
145 * @stop: iscsi in FW
146 * @param cdev
147 * return 0 on success, otherwise error value.
148 * @acquire_conn: acquire a new iscsi connection
149 * @param cdev
150 * @param handle - qed will fill handle that should be
151 * used henceforth as identifier of the
152 * connection.
153 * @param p_doorbell - qed will fill the address of the
154 * doorbell.
155 * @return 0 on success, otherwise error value.
156 * @release_conn: release a previously acquired iscsi connection
157 * @param cdev
158 * @param handle - the connection handle.
159 * @return 0 on success, otherwise error value.
160 * @offload_conn: configures an offloaded connection
161 * @param cdev
162 * @param handle - the connection handle.
163 * @param conn_info - the configuration to use for the
164 * offload.
165 * @return 0 on success, otherwise error value.
166 * @update_conn: updates an offloaded connection
167 * @param cdev
168 * @param handle - the connection handle.
169 * @param conn_info - the configuration to use for the
170 * offload.
171 * @return 0 on success, otherwise error value.
172 * @destroy_conn: stops an offloaded connection
173 * @param cdev
174 * @param handle - the connection handle.
175 * @return 0 on success, otherwise error value.
176 * @clear_sq: clear all task in sq
177 * @param cdev
178 * @param handle - the connection handle.
179 * @return 0 on success, otherwise error value.
180 * @get_stats: iSCSI related statistics
181 * @param cdev
182 * @param stats - pointer to struck that would be filled
183 * we stats
184 * @return 0 on success, error otherwise.
185 * @change_mac: Change MAC of interface
186 * @param cdev
187 * @param handle - the connection handle.
188 * @param mac - new MAC to configure.
189 * @return 0 on success, otherwise error value.
190 */
191 struct qed_iscsi_ops {
192 const struct qed_common_ops *common;
193
194 const struct qed_ll2_ops *ll2;
195
196 int (*fill_dev_info)(struct qed_dev *cdev,
197 struct qed_dev_iscsi_info *info);
198
199 void (*register_ops)(struct qed_dev *cdev,
200 struct qed_iscsi_cb_ops *ops, void *cookie);
201
202 int (*start)(struct qed_dev *cdev,
203 struct qed_iscsi_tid *tasks,
204 void *event_context, iscsi_event_cb_t async_event_cb);
205
206 int (*stop)(struct qed_dev *cdev);
207
208 int (*acquire_conn)(struct qed_dev *cdev,
209 u32 *handle,
210 u32 *fw_cid, void __iomem **p_doorbell);
211
212 int (*release_conn)(struct qed_dev *cdev, u32 handle);
213
214 int (*offload_conn)(struct qed_dev *cdev,
215 u32 handle,
216 struct qed_iscsi_params_offload *conn_info);
217
218 int (*update_conn)(struct qed_dev *cdev,
219 u32 handle,
220 struct qed_iscsi_params_update *conn_info);
221
222 int (*destroy_conn)(struct qed_dev *cdev, u32 handle, u8 abrt_conn);
223
224 int (*clear_sq)(struct qed_dev *cdev, u32 handle);
225
226 int (*get_stats)(struct qed_dev *cdev,
227 struct qed_iscsi_stats *stats);
228
229 int (*change_mac)(struct qed_dev *cdev, u32 handle, const u8 *mac);
230 };
231
232 const struct qed_iscsi_ops *qed_get_iscsi_ops(void);
233 void qed_put_iscsi_ops(void);
234 #endif
235
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