drivers/infiniband/ulp/isert/isert_proto.h

   1 /* From iscsi_iser.h */
   2
   3 struct iser_hdr {
   4         u8      flags;
   5         u8      rsvd[3];
   6         __be32  write_stag; /* write rkey */
   7         __be64  write_va;
   8         __be32  read_stag;  /* read rkey */
   9         __be64  read_va;
  10 } __packed;
  11
  12 /*Constant PDU lengths calculations */
  13 #define ISER_HEADERS_LEN  (sizeof(struct iser_hdr) + sizeof(struct iscsi_hdr))
  14
  15 #define ISER_RECV_DATA_SEG_LEN  8192
  16 #define ISER_RX_PAYLOAD_SIZE    (ISER_HEADERS_LEN + ISER_RECV_DATA_SEG_LEN)
  17 #define ISER_RX_LOGIN_SIZE      (ISER_HEADERS_LEN + ISCSI_DEF_MAX_RECV_SEG_LEN)
  18
  19 /* QP settings */
  20 /* Maximal bounds on received asynchronous PDUs */
  21 #define ISERT_MAX_TX_MISC_PDUS  4 /* NOOP_IN(2) , ASYNC_EVENT(2)   */
  22
  23 #define ISERT_MAX_RX_MISC_PDUS  6 /* NOOP_OUT(2), TEXT(1),         *
  24                                    * SCSI_TMFUNC(2), LOGOUT(1) */
  25
  26 #define ISCSI_DEF_XMIT_CMDS_MAX 128 /* from libiscsi.h, must be power of 2 */
  27
  28 #define ISERT_QP_MAX_RECV_DTOS  (ISCSI_DEF_XMIT_CMDS_MAX)
  29
  30 #define ISERT_MIN_POSTED_RX     (ISCSI_DEF_XMIT_CMDS_MAX >> 2)
  31
  32 #define ISERT_INFLIGHT_DATAOUTS 8
  33
  34 #define ISERT_QP_MAX_REQ_DTOS   (ISCSI_DEF_XMIT_CMDS_MAX *    \
  35                                 (1 + ISERT_INFLIGHT_DATAOUTS) + \
  36                                 ISERT_MAX_TX_MISC_PDUS  + \
  37                                 ISERT_MAX_RX_MISC_PDUS)
  38
  39 #define ISER_RX_PAD_SIZE        (ISER_RECV_DATA_SEG_LEN + 4096 - \
  40                 (ISER_RX_PAYLOAD_SIZE + sizeof(u64) + sizeof(struct ib_sge)))
  41
  42 #define ISER_VER        0x10
  43 #define ISER_WSV        0x08
  44 #define ISER_RSV        0x04
  45 #define ISCSI_CTRL      0x10
  46 #define ISER_HELLO      0x20
  47 #define ISER_HELLORPLY  0x30