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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_ISCSI_IF_H
34#define _QED_ISCSI_IF_H
35#include <linux/types.h>
36#include <linux/qed/qed_if.h>
37
38typedef int (*iscsi_event_cb_t) (void *context,
39 u8 fw_event_code, void *fw_handle);
40struct qed_iscsi_stats {
41 u64 iscsi_rx_bytes_cnt;
42 u64 iscsi_rx_packet_cnt;
43 u64 iscsi_rx_new_ooo_isle_events_cnt;
44 u32 iscsi_cmdq_threshold_cnt;
45 u32 iscsi_rq_threshold_cnt;
46 u32 iscsi_immq_threshold_cnt;
47
48 u64 iscsi_rx_dropped_pdus_task_not_valid;
49
50 u64 iscsi_rx_data_pdu_cnt;
51 u64 iscsi_rx_r2t_pdu_cnt;
52 u64 iscsi_rx_total_pdu_cnt;
53
54 u64 iscsi_tx_go_to_slow_start_event_cnt;
55 u64 iscsi_tx_fast_retransmit_event_cnt;
56
57 u64 iscsi_tx_data_pdu_cnt;
58 u64 iscsi_tx_r2t_pdu_cnt;
59 u64 iscsi_tx_total_pdu_cnt;
60
61 u64 iscsi_tx_bytes_cnt;
62 u64 iscsi_tx_packet_cnt;
63};
64
65struct qed_dev_iscsi_info {
66 struct qed_dev_info common;
67
68 void __iomem *primary_dbq_rq_addr;
69 void __iomem *secondary_bdq_rq_addr;
70
71 u8 num_cqs;
72};
73
74struct qed_iscsi_id_params {
75 u8 mac[ETH_ALEN];
76 u32 ip[4];
77 u16 port;
78};
79
80struct qed_iscsi_params_offload {
81 u8 layer_code;
82 dma_addr_t sq_pbl_addr;
83 u32 initial_ack;
84
85 struct qed_iscsi_id_params src;
86 struct qed_iscsi_id_params dst;
87 u16 vlan_id;
88 u8 tcp_flags;
89 u8 ip_version;
90 u8 default_cq;
91
92 u8 ka_max_probe_cnt;
93 u8 dup_ack_theshold;
94 u32 rcv_next;
95 u32 snd_una;
96 u32 snd_next;
97 u32 snd_max;
98 u32 snd_wnd;
99 u32 rcv_wnd;
100 u32 snd_wl1;
101 u32 cwnd;
102 u32 ss_thresh;
103 u16 srtt;
104 u16 rtt_var;
105 u32 ts_time;
106 u32 ts_recent;
107 u32 ts_recent_age;
108 u32 total_rt;
109 u32 ka_timeout_delta;
110 u32 rt_timeout_delta;
111 u8 dup_ack_cnt;
112 u8 snd_wnd_probe_cnt;
113 u8 ka_probe_cnt;
114 u8 rt_cnt;
115 u32 flow_label;
116 u32 ka_timeout;
117 u32 ka_interval;
118 u32 max_rt_time;
119 u32 initial_rcv_wnd;
120 u8 ttl;
121 u8 tos_or_tc;
122 u16 remote_port;
123 u16 local_port;
124 u16 mss;
125 u8 snd_wnd_scale;
126 u8 rcv_wnd_scale;
127 u32 ts_ticks_per_second;
128 u16 da_timeout_value;
129 u8 ack_frequency;
130};
131
132struct qed_iscsi_params_update {
133 u8 update_flag;
134#define QED_ISCSI_CONN_HD_EN BIT(0)
135#define QED_ISCSI_CONN_DD_EN BIT(1)
136#define QED_ISCSI_CONN_INITIAL_R2T BIT(2)
137#define QED_ISCSI_CONN_IMMEDIATE_DATA BIT(3)
138
139 u32 max_seq_size;
140 u32 max_recv_pdu_length;
141 u32 max_send_pdu_length;
142 u32 first_seq_length;
143 u32 exp_stat_sn;
144};
145
146#define MAX_TID_BLOCKS_ISCSI (512)
147struct qed_iscsi_tid {
148 u32 size; /* In bytes per task */
149 u32 num_tids_per_block;
150 u8 *blocks[MAX_TID_BLOCKS_ISCSI];
151};
152
153struct qed_iscsi_cb_ops {
154 struct qed_common_cb_ops common;
155};
156
157/**
158 * struct qed_iscsi_ops - qed iSCSI operations.
159 * @common: common operations pointer
160 * @ll2: light L2 operations pointer
161 * @fill_dev_info: fills iSCSI specific information
162 * @param cdev
163 * @param info
164 * @return 0 on sucesss, otherwise error value.
165 * @register_ops: register iscsi operations
166 * @param cdev
167 * @param ops - specified using qed_iscsi_cb_ops
168 * @param cookie - driver private
169 * @start: iscsi in FW
170 * @param cdev
171 * @param tasks - qed will fill information about tasks
172 * return 0 on success, otherwise error value.
173 * @stop: iscsi in FW
174 * @param cdev
175 * return 0 on success, otherwise error value.
176 * @acquire_conn: acquire a new iscsi connection
177 * @param cdev
178 * @param handle - qed will fill handle that should be
179 * used henceforth as identifier of the
180 * connection.
181 * @param p_doorbell - qed will fill the address of the
182 * doorbell.
183 * @return 0 on sucesss, otherwise error value.
184 * @release_conn: release a previously acquired iscsi connection
185 * @param cdev
186 * @param handle - the connection handle.
187 * @return 0 on success, otherwise error value.
188 * @offload_conn: configures an offloaded connection
189 * @param cdev
190 * @param handle - the connection handle.
191 * @param conn_info - the configuration to use for the
192 * offload.
193 * @return 0 on success, otherwise error value.
194 * @update_conn: updates an offloaded connection
195 * @param cdev
196 * @param handle - the connection handle.
197 * @param conn_info - the configuration to use for the
198 * offload.
199 * @return 0 on success, otherwise error value.
200 * @destroy_conn: stops an offloaded connection
201 * @param cdev
202 * @param handle - the connection handle.
203 * @return 0 on success, otherwise error value.
204 * @clear_sq: clear all task in sq
205 * @param cdev
206 * @param handle - the connection handle.
207 * @return 0 on success, otherwise error value.
208 * @get_stats: iSCSI related statistics
209 * @param cdev
210 * @param stats - pointer to struck that would be filled
211 * we stats
212 * @return 0 on success, error otherwise.
213 * @change_mac Change MAC of interface
214 * @param cdev
215 * @param handle - the connection handle.
216 * @param mac - new MAC to configure.
217 * @return 0 on success, otherwise error value.
218 */
219struct qed_iscsi_ops {
220 const struct qed_common_ops *common;
221
222 const struct qed_ll2_ops *ll2;
223
224 int (*fill_dev_info)(struct qed_dev *cdev,
225 struct qed_dev_iscsi_info *info);
226
227 void (*register_ops)(struct qed_dev *cdev,
228 struct qed_iscsi_cb_ops *ops, void *cookie);
229
230 int (*start)(struct qed_dev *cdev,
231 struct qed_iscsi_tid *tasks,
232 void *event_context, iscsi_event_cb_t async_event_cb);
233
234 int (*stop)(struct qed_dev *cdev);
235
236 int (*acquire_conn)(struct qed_dev *cdev,
237 u32 *handle,
238 u32 *fw_cid, void __iomem **p_doorbell);
239
240 int (*release_conn)(struct qed_dev *cdev, u32 handle);
241
242 int (*offload_conn)(struct qed_dev *cdev,
243 u32 handle,
244 struct qed_iscsi_params_offload *conn_info);
245
246 int (*update_conn)(struct qed_dev *cdev,
247 u32 handle,
248 struct qed_iscsi_params_update *conn_info);
249
250 int (*destroy_conn)(struct qed_dev *cdev, u32 handle, u8 abrt_conn);
251
252 int (*clear_sq)(struct qed_dev *cdev, u32 handle);
253
254 int (*get_stats)(struct qed_dev *cdev,
255 struct qed_iscsi_stats *stats);
256
257 int (*change_mac)(struct qed_dev *cdev, u32 handle, const u8 *mac);
258};
259
260const struct qed_iscsi_ops *qed_get_iscsi_ops(void);
261void qed_put_iscsi_ops(void);
262#endif