drivers/infiniband/ulp/isert/ib_isert.h

   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
   9 enum isert_desc_type {
  10         ISCSI_TX_CONTROL,
  11         ISCSI_TX_DATAIN
  12 };
  13
  14 enum iser_ib_op_code {
  15         ISER_IB_RECV,
  16         ISER_IB_SEND,
  17         ISER_IB_RDMA_WRITE,
  18         ISER_IB_RDMA_READ,
  19 };
  20
  21 enum iser_conn_state {
  22         ISER_CONN_INIT,
  23         ISER_CONN_UP,
  24         ISER_CONN_TERMINATING,
  25         ISER_CONN_DOWN,
  26 };
  27
  28 struct iser_rx_desc {
  29         struct iser_hdr iser_header;
  30         struct iscsi_hdr iscsi_header;
  31         char            data[ISER_RECV_DATA_SEG_LEN];
  32         u64             dma_addr;
  33         struct ib_sge   rx_sg;
  34         char            pad[ISER_RX_PAD_SIZE];
  35 } __packed;
  36
  37 struct iser_tx_desc {
  38         struct iser_hdr iser_header;
  39         struct iscsi_hdr iscsi_header;
  40         enum isert_desc_type type;
  41         u64             dma_addr;
  42         struct ib_sge   tx_sg[2];
  43         int             num_sge;
  44         struct isert_cmd *isert_cmd;
  45         struct ib_send_wr send_wr;
  46 } __packed;
  47
  48 struct isert_rdma_wr {
  49         struct list_head        wr_list;
  50         struct isert_cmd        *isert_cmd;
  51         enum iser_ib_op_code    iser_ib_op;
  52         struct ib_sge           *ib_sge;
  53         int                     num_sge;
  54         struct scatterlist      *sge;
  55         int                     send_wr_num;
  56         struct ib_send_wr       *send_wr;
  57 };
  58
  59 struct isert_cmd {
  60         uint32_t                read_stag;
  61         uint32_t                write_stag;
  62         uint64_t                read_va;
  63         uint64_t                write_va;
  64         u64                     sense_buf_dma;
  65         u32                     sense_buf_len;
  66         u32                     read_va_off;
  67         u32                     write_va_off;
  68         u32                     rdma_wr_num;
  69         struct isert_conn       *conn;
  70         struct iscsi_cmd        iscsi_cmd;
  71         struct ib_sge           *ib_sge;
  72         struct iser_tx_desc     tx_desc;
  73         struct isert_rdma_wr    rdma_wr;
  74         struct work_struct      comp_work;
  75 };
  76
  77 struct isert_device;
  78
  79 struct isert_conn {
  80         enum iser_conn_state    state;
  81         bool                    logout_posted;
  82         int                     post_recv_buf_count;
  83         atomic_t                post_send_buf_count;
  84         u32                     responder_resources;
  85         u32                     initiator_depth;
  86         u32                     max_sge;
  87         char                    *login_buf;
  88         char                    *login_req_buf;
  89         char                    *login_rsp_buf;
  90         u64                     login_req_dma;
  91         u64                     login_rsp_dma;
  92         unsigned int            conn_rx_desc_head;
  93         struct iser_rx_desc     *conn_rx_descs;
  94         struct ib_recv_wr       conn_rx_wr[ISERT_MIN_POSTED_RX];
  95         struct iscsi_conn       *conn;
  96         struct list_head        conn_accept_node;
  97         struct completion       conn_login_comp;
  98         struct iser_tx_desc     conn_login_tx_desc;
  99         struct rdma_cm_id       *conn_cm_id;
 100         struct ib_pd            *conn_pd;
 101         struct ib_mr            *conn_mr;
 102         struct ib_qp            *conn_qp;
 103         struct isert_device     *conn_device;
 104         struct work_struct      conn_logout_work;
 105         struct mutex            conn_mutex;
 106         struct completion       conn_wait;
 107         struct completion       conn_wait_comp_err;
 108         struct kref             conn_kref;
 109 };
 110
 111 #define ISERT_MAX_CQ 64
 112
 113 struct isert_cq_desc {
 114         struct isert_device     *device;
 115         int                     cq_index;
 116         struct work_struct      cq_rx_work;
 117         struct work_struct      cq_tx_work;
 118 };
 119
 120 struct isert_device {
 121         int                     cqs_used;
 122         int                     refcount;
 123         int                     cq_active_qps[ISERT_MAX_CQ];
 124         struct ib_device        *ib_device;
 125         struct ib_pd            *dev_pd;
 126         struct ib_mr            *dev_mr;
 127         struct ib_cq            *dev_rx_cq[ISERT_MAX_CQ];
 128         struct ib_cq            *dev_tx_cq[ISERT_MAX_CQ];
 129         struct isert_cq_desc    *cq_desc;
 130         struct list_head        dev_node;
 131 };
 132
 133 struct isert_np {
 134         wait_queue_head_t       np_accept_wq;
 135         struct rdma_cm_id       *np_cm_id;
 136         struct mutex            np_accept_mutex;
 137         struct list_head        np_accept_list;
 138         struct completion       np_login_comp;
 139 };