summaryrefslogtreecommitdiff
path: root/include/linux/qed/qed_iscsi_if.h
blob: f70bb81b8b6acfda1701ffcd073163db05a82770 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
/* QLogic qed NIC Driver
 * Copyright (c) 2015-2017  QLogic Corporation
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and /or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef _QED_ISCSI_IF_H
#define _QED_ISCSI_IF_H
#include <linux/types.h>
#include <linux/qed/qed_if.h>

typedef int (*iscsi_event_cb_t) (void *context,
				 u8 fw_event_code, void *fw_handle);
struct qed_iscsi_stats {
	u64 iscsi_rx_bytes_cnt;
	u64 iscsi_rx_packet_cnt;
	u64 iscsi_rx_new_ooo_isle_events_cnt;
	u32 iscsi_cmdq_threshold_cnt;
	u32 iscsi_rq_threshold_cnt;
	u32 iscsi_immq_threshold_cnt;

	u64 iscsi_rx_dropped_pdus_task_not_valid;

	u64 iscsi_rx_data_pdu_cnt;
	u64 iscsi_rx_r2t_pdu_cnt;
	u64 iscsi_rx_total_pdu_cnt;

	u64 iscsi_tx_go_to_slow_start_event_cnt;
	u64 iscsi_tx_fast_retransmit_event_cnt;

	u64 iscsi_tx_data_pdu_cnt;
	u64 iscsi_tx_r2t_pdu_cnt;
	u64 iscsi_tx_total_pdu_cnt;

	u64 iscsi_tx_bytes_cnt;
	u64 iscsi_tx_packet_cnt;
};

struct qed_dev_iscsi_info {
	struct qed_dev_info common;

	void __iomem *primary_dbq_rq_addr;
	void __iomem *secondary_bdq_rq_addr;
};

struct qed_iscsi_id_params {
	u8 mac[ETH_ALEN];
	u32 ip[4];
	u16 port;
};

struct qed_iscsi_params_offload {
	u8 layer_code;
	dma_addr_t sq_pbl_addr;
	u32 initial_ack;

	struct qed_iscsi_id_params src;
	struct qed_iscsi_id_params dst;
	u16 vlan_id;
	u8 tcp_flags;
	u8 ip_version;
	u8 default_cq;

	u8 ka_max_probe_cnt;
	u8 dup_ack_theshold;
	u32 rcv_next;
	u32 snd_una;
	u32 snd_next;
	u32 snd_max;
	u32 snd_wnd;
	u32 rcv_wnd;
	u32 snd_wl1;
	u32 cwnd;
	u32 ss_thresh;
	u16 srtt;
	u16 rtt_var;
	u32 ts_time;
	u32 ts_recent;
	u32 ts_recent_age;
	u32 total_rt;
	u32 ka_timeout_delta;
	u32 rt_timeout_delta;
	u8 dup_ack_cnt;
	u8 snd_wnd_probe_cnt;
	u8 ka_probe_cnt;
	u8 rt_cnt;
	u32 flow_label;
	u32 ka_timeout;
	u32 ka_interval;
	u32 max_rt_time;
	u32 initial_rcv_wnd;
	u8 ttl;
	u8 tos_or_tc;
	u16 remote_port;
	u16 local_port;
	u16 mss;
	u8 snd_wnd_scale;
	u8 rcv_wnd_scale;
	u32 ts_ticks_per_second;
	u16 da_timeout_value;
	u8 ack_frequency;
};

struct qed_iscsi_params_update {
	u8 update_flag;
#define QED_ISCSI_CONN_HD_EN            BIT(0)
#define QED_ISCSI_CONN_DD_EN            BIT(1)
#define QED_ISCSI_CONN_INITIAL_R2T      BIT(2)
#define QED_ISCSI_CONN_IMMEDIATE_DATA   BIT(3)

	u32 max_seq_size;
	u32 max_recv_pdu_length;
	u32 max_send_pdu_length;
	u32 first_seq_length;
	u32 exp_stat_sn;
};

#define MAX_TID_BLOCKS_ISCSI (512)
struct qed_iscsi_tid {
	u32 size;		/* In bytes per task */
	u32 num_tids_per_block;
	u8 *blocks[MAX_TID_BLOCKS_ISCSI];
};

struct qed_iscsi_cb_ops {
	struct qed_common_cb_ops common;
};

/**
 * struct qed_iscsi_ops - qed iSCSI operations.
 * @common:		common operations pointer
 * @ll2:		light L2 operations pointer
 * @fill_dev_info:	fills iSCSI specific information
 *			@param cdev
 *			@param info
 *			@return 0 on sucesss, otherwise error value.
 * @register_ops:	register iscsi operations
 *			@param cdev
 *			@param ops - specified using qed_iscsi_cb_ops
 *			@param cookie - driver private
 * @start:		iscsi in FW
 *			@param cdev
 *			@param tasks - qed will fill information about tasks
 *			return 0 on success, otherwise error value.
 * @stop:		iscsi in FW
 *			@param cdev
 *			return 0 on success, otherwise error value.
 * @acquire_conn:	acquire a new iscsi connection
 *			@param cdev
 *			@param handle - qed will fill handle that should be
 *				used henceforth as identifier of the
 *				connection.
 *			@param p_doorbell - qed will fill the address of the
 *				doorbell.
 *			@return 0 on sucesss, otherwise error value.
 * @release_conn:	release a previously acquired iscsi connection
 *			@param cdev
 *			@param handle - the connection handle.
 *			@return 0 on success, otherwise error value.
 * @offload_conn:	configures an offloaded connection
 *			@param cdev
 *			@param handle - the connection handle.
 *			@param conn_info - the configuration to use for the
 *				offload.
 *			@return 0 on success, otherwise error value.
 * @update_conn:	updates an offloaded connection
 *			@param cdev
 *			@param handle - the connection handle.
 *			@param conn_info - the configuration to use for the
 *				offload.
 *			@return 0 on success, otherwise error value.
 * @destroy_conn:	stops an offloaded connection
 *			@param cdev
 *			@param handle - the connection handle.
 *			@return 0 on success, otherwise error value.
 * @clear_sq:		clear all task in sq
 *			@param cdev
 *			@param handle - the connection handle.
 *			@return 0 on success, otherwise error value.
 * @get_stats:		iSCSI related statistics
 *			@param cdev
 *			@param stats - pointer to struck that would be filled
 *				we stats
 *			@return 0 on success, error otherwise.
 */
struct qed_iscsi_ops {
	const struct qed_common_ops *common;

	const struct qed_ll2_ops *ll2;

	int (*fill_dev_info)(struct qed_dev *cdev,
			     struct qed_dev_iscsi_info *info);

	void (*register_ops)(struct qed_dev *cdev,
			     struct qed_iscsi_cb_ops *ops, void *cookie);

	int (*start)(struct qed_dev *cdev,
		     struct qed_iscsi_tid *tasks,
		     void *event_context, iscsi_event_cb_t async_event_cb);

	int (*stop)(struct qed_dev *cdev);

	int (*acquire_conn)(struct qed_dev *cdev,
			    u32 *handle,
			    u32 *fw_cid, void __iomem **p_doorbell);

	int (*release_conn)(struct qed_dev *cdev, u32 handle);

	int (*offload_conn)(struct qed_dev *cdev,
			    u32 handle,
			    struct qed_iscsi_params_offload *conn_info);

	int (*update_conn)(struct qed_dev *cdev,
			   u32 handle,
			   struct qed_iscsi_params_update *conn_info);

	int (*destroy_conn)(struct qed_dev *cdev, u32 handle, u8 abrt_conn);

	int (*clear_sq)(struct qed_dev *cdev, u32 handle);

	int (*get_stats)(struct qed_dev *cdev,
			 struct qed_iscsi_stats *stats);
};

const struct qed_iscsi_ops *qed_get_iscsi_ops(void);
void qed_put_iscsi_ops(void);
#endif