include/linux/qed/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
  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