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 38 typedef int (*iscsi_event_cb_t) (void *context, 39 u8 fw_event_code, void *fw_handle); 40 struct 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 65 struct 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 74 struct qed_iscsi_id_params { 75 u8 mac[ETH_ALEN]; 76 u32 ip[4]; 77 u16 port; 78 }; 79 80 struct 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_recent; 106 u32 ts_recent_age; 107 u32 total_rt; 108 u32 ka_timeout_delta; 109 u32 rt_timeout_delta; 110 u8 dup_ack_cnt; 111 u8 snd_wnd_probe_cnt; 112 u8 ka_probe_cnt; 113 u8 rt_cnt; 114 u32 flow_label; 115 u32 ka_timeout; 116 u32 ka_interval; 117 u32 max_rt_time; 118 u32 initial_rcv_wnd; 119 u8 ttl; 120 u8 tos_or_tc; 121 u16 remote_port; 122 u16 local_port; 123 u16 mss; 124 u8 snd_wnd_scale; 125 u8 rcv_wnd_scale; 126 u16 da_timeout_value; 127 u8 ack_frequency; 128 }; 129 130 struct qed_iscsi_params_update { 131 u8 update_flag; 132 #define QED_ISCSI_CONN_HD_EN BIT(0) 133 #define QED_ISCSI_CONN_DD_EN BIT(1) 134 #define QED_ISCSI_CONN_INITIAL_R2T BIT(2) 135 #define QED_ISCSI_CONN_IMMEDIATE_DATA BIT(3) 136 137 u32 max_seq_size; 138 u32 max_recv_pdu_length; 139 u32 max_send_pdu_length; 140 u32 first_seq_length; 141 u32 exp_stat_sn; 142 }; 143 144 #define MAX_TID_BLOCKS_ISCSI (512) 145 struct qed_iscsi_tid { 146 u32 size; /* In bytes per task */ 147 u32 num_tids_per_block; 148 u8 *blocks[MAX_TID_BLOCKS_ISCSI]; 149 }; 150 151 struct qed_iscsi_cb_ops { 152 struct qed_common_cb_ops common; 153 }; 154 155 /** 156 * struct qed_iscsi_ops - qed iSCSI operations. 157 * @common: common operations pointer 158 * @ll2: light L2 operations pointer 159 * @fill_dev_info: fills iSCSI specific information 160 * @param cdev 161 * @param info 162 * @return 0 on sucesss, otherwise error value. 163 * @register_ops: register iscsi operations 164 * @param cdev 165 * @param ops - specified using qed_iscsi_cb_ops 166 * @param cookie - driver private 167 * @start: iscsi in FW 168 * @param cdev 169 * @param tasks - qed will fill information about tasks 170 * return 0 on success, otherwise error value. 171 * @stop: iscsi in FW 172 * @param cdev 173 * return 0 on success, otherwise error value. 174 * @acquire_conn: acquire a new iscsi connection 175 * @param cdev 176 * @param handle - qed will fill handle that should be 177 * used henceforth as identifier of the 178 * connection. 179 * @param p_doorbell - qed will fill the address of the 180 * doorbell. 181 * @return 0 on sucesss, otherwise error value. 182 * @release_conn: release a previously acquired iscsi connection 183 * @param cdev 184 * @param handle - the connection handle. 185 * @return 0 on success, otherwise error value. 186 * @offload_conn: configures an offloaded connection 187 * @param cdev 188 * @param handle - the connection handle. 189 * @param conn_info - the configuration to use for the 190 * offload. 191 * @return 0 on success, otherwise error value. 192 * @update_conn: updates an offloaded connection 193 * @param cdev 194 * @param handle - the connection handle. 195 * @param conn_info - the configuration to use for the 196 * offload. 197 * @return 0 on success, otherwise error value. 198 * @destroy_conn: stops an offloaded connection 199 * @param cdev 200 * @param handle - the connection handle. 201 * @return 0 on success, otherwise error value. 202 * @clear_sq: clear all task in sq 203 * @param cdev 204 * @param handle - the connection handle. 205 * @return 0 on success, otherwise error value. 206 * @get_stats: iSCSI related statistics 207 * @param cdev 208 * @param stats - pointer to struck that would be filled 209 * we stats 210 * @return 0 on success, error otherwise. 211 * @change_mac Change MAC of interface 212 * @param cdev 213 * @param handle - the connection handle. 214 * @param mac - new MAC to configure. 215 * @return 0 on success, otherwise error value. 216 */ 217 struct qed_iscsi_ops { 218 const struct qed_common_ops *common; 219 220 const struct qed_ll2_ops *ll2; 221 222 int (*fill_dev_info)(struct qed_dev *cdev, 223 struct qed_dev_iscsi_info *info); 224 225 void (*register_ops)(struct qed_dev *cdev, 226 struct qed_iscsi_cb_ops *ops, void *cookie); 227 228 int (*start)(struct qed_dev *cdev, 229 struct qed_iscsi_tid *tasks, 230 void *event_context, iscsi_event_cb_t async_event_cb); 231 232 int (*stop)(struct qed_dev *cdev); 233 234 int (*acquire_conn)(struct qed_dev *cdev, 235 u32 *handle, 236 u32 *fw_cid, void __iomem **p_doorbell); 237 238 int (*release_conn)(struct qed_dev *cdev, u32 handle); 239 240 int (*offload_conn)(struct qed_dev *cdev, 241 u32 handle, 242 struct qed_iscsi_params_offload *conn_info); 243 244 int (*update_conn)(struct qed_dev *cdev, 245 u32 handle, 246 struct qed_iscsi_params_update *conn_info); 247 248 int (*destroy_conn)(struct qed_dev *cdev, u32 handle, u8 abrt_conn); 249 250 int (*clear_sq)(struct qed_dev *cdev, u32 handle); 251 252 int (*get_stats)(struct qed_dev *cdev, 253 struct qed_iscsi_stats *stats); 254 255 int (*change_mac)(struct qed_dev *cdev, u32 handle, const u8 *mac); 256 }; 257 258 const struct qed_iscsi_ops *qed_get_iscsi_ops(void); 259 void qed_put_iscsi_ops(void); 260 #endif 261