qed_iscsi_if.h

  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
 12typedef int (*iscsi_event_cb_t) (void *context,
 13				 u8 fw_event_code, void *fw_handle);
 14struct 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
 39struct 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
 48struct qed_iscsi_id_params {
 49	u8 mac[ETH_ALEN];
 50	u32 ip[4];
 51	u16 port;
 52};
 53
 54struct 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
104struct 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)
119struct 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
125struct 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 */
191struct 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
232const struct qed_iscsi_ops *qed_get_iscsi_ops(void);
233void qed_put_iscsi_ops(void);
234#endif