1 #include <linux/socket.h> 2 #include <linux/in.h> 3 #include <linux/in6.h> 4 #include <rdma/ib_verbs.h> 5 #include <rdma/rdma_cm.h> 6 7 #define ISERT_RDMA_LISTEN_BACKLOG 10 8 #define ISCSI_ISER_SG_TABLESIZE 256 9 #define ISER_FASTREG_LI_WRID 0xffffffffffffffffULL 10 11 enum isert_desc_type { 12 ISCSI_TX_CONTROL, 13 ISCSI_TX_DATAIN 14 }; 15 16 enum iser_ib_op_code { 17 ISER_IB_RECV, 18 ISER_IB_SEND, 19 ISER_IB_RDMA_WRITE, 20 ISER_IB_RDMA_READ, 21 }; 22 23 enum iser_conn_state { 24 ISER_CONN_INIT, 25 ISER_CONN_UP, 26 ISER_CONN_TERMINATING, 27 ISER_CONN_DOWN, 28 }; 29 30 struct iser_rx_desc { 31 struct iser_hdr iser_header; 32 struct iscsi_hdr iscsi_header; 33 char data[ISER_RECV_DATA_SEG_LEN]; 34 u64 dma_addr; 35 struct ib_sge rx_sg; 36 char pad[ISER_RX_PAD_SIZE]; 37 } __packed; 38 39 struct iser_tx_desc { 40 struct iser_hdr iser_header; 41 struct iscsi_hdr iscsi_header; 42 enum isert_desc_type type; 43 u64 dma_addr; 44 struct ib_sge tx_sg[2]; 45 int num_sge; 46 struct isert_cmd *isert_cmd; 47 struct llist_node *comp_llnode_batch; 48 struct llist_node comp_llnode; 49 bool llnode_active; 50 struct ib_send_wr send_wr; 51 } __packed; 52 53 struct fast_reg_descriptor { 54 struct list_head list; 55 struct ib_mr *data_mr; 56 struct ib_fast_reg_page_list *data_frpl; 57 bool valid; 58 }; 59 60 struct isert_rdma_wr { 61 struct list_head wr_list; 62 struct isert_cmd *isert_cmd; 63 enum iser_ib_op_code iser_ib_op; 64 struct ib_sge *ib_sge; 65 struct ib_sge s_ib_sge; 66 int num_sge; 67 struct scatterlist *sge; 68 int send_wr_num; 69 struct ib_send_wr *send_wr; 70 struct ib_send_wr s_send_wr; 71 u32 cur_rdma_length; 72 struct fast_reg_descriptor *fr_desc; 73 }; 74 75 struct isert_cmd { 76 uint32_t read_stag; 77 uint32_t write_stag; 78 uint64_t read_va; 79 uint64_t write_va; 80 u64 pdu_buf_dma; 81 u32 pdu_buf_len; 82 u32 read_va_off; 83 u32 write_va_off; 84 u32 rdma_wr_num; 85 struct isert_conn *conn; 86 struct iscsi_cmd *iscsi_cmd; 87 struct iser_tx_desc tx_desc; 88 struct isert_rdma_wr rdma_wr; 89 struct work_struct comp_work; 90 }; 91 92 struct isert_device; 93 94 struct isert_conn { 95 enum iser_conn_state state; 96 bool logout_posted; 97 int post_recv_buf_count; 98 atomic_t post_send_buf_count; 99 u32 responder_resources; 100 u32 initiator_depth; 101 u32 max_sge; 102 char *login_buf; 103 char *login_req_buf; 104 char *login_rsp_buf; 105 u64 login_req_dma; 106 u64 login_rsp_dma; 107 unsigned int conn_rx_desc_head; 108 struct iser_rx_desc *conn_rx_descs; 109 struct ib_recv_wr conn_rx_wr[ISERT_MIN_POSTED_RX]; 110 struct iscsi_conn *conn; 111 struct list_head conn_accept_node; 112 struct completion conn_login_comp; 113 struct iser_tx_desc conn_login_tx_desc; 114 struct rdma_cm_id *conn_cm_id; 115 struct ib_pd *conn_pd; 116 struct ib_mr *conn_mr; 117 struct ib_qp *conn_qp; 118 struct isert_device *conn_device; 119 struct work_struct conn_logout_work; 120 struct mutex conn_mutex; 121 struct completion conn_wait; 122 struct completion conn_wait_comp_err; 123 struct kref conn_kref; 124 struct list_head conn_fr_pool; 125 int conn_fr_pool_size; 126 /* lock to protect fastreg pool */ 127 spinlock_t conn_lock; 128 #define ISERT_COMP_BATCH_COUNT 8 129 int conn_comp_batch; 130 struct llist_head conn_comp_llist; 131 }; 132 133 #define ISERT_MAX_CQ 64 134 135 struct isert_cq_desc { 136 struct isert_device *device; 137 int cq_index; 138 struct work_struct cq_rx_work; 139 struct work_struct cq_tx_work; 140 }; 141 142 struct isert_device { 143 int use_fastreg; 144 int cqs_used; 145 int refcount; 146 int cq_active_qps[ISERT_MAX_CQ]; 147 struct ib_device *ib_device; 148 struct ib_cq *dev_rx_cq[ISERT_MAX_CQ]; 149 struct ib_cq *dev_tx_cq[ISERT_MAX_CQ]; 150 struct isert_cq_desc *cq_desc; 151 struct list_head dev_node; 152 struct ib_device_attr dev_attr; 153 int (*reg_rdma_mem)(struct iscsi_conn *conn, 154 struct iscsi_cmd *cmd, 155 struct isert_rdma_wr *wr); 156 void (*unreg_rdma_mem)(struct isert_cmd *isert_cmd, 157 struct isert_conn *isert_conn); 158 }; 159 160 struct isert_np { 161 wait_queue_head_t np_accept_wq; 162 struct rdma_cm_id *np_cm_id; 163 struct mutex np_accept_mutex; 164 struct list_head np_accept_list; 165 struct completion np_login_comp; 166 }; 167