From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
---
drivers/infiniband/ulp/isert/isert_base.h | 123 ++++++++++++++++++++++++++++
drivers/infiniband/ulp/isert/isert_proto.h | 47 +++++++++++
2 files changed, 170 insertions(+), 0 deletions(-)
create mode 100644 drivers/infiniband/ulp/isert/isert_base.h
create mode 100644 drivers/infiniband/ulp/isert/isert_proto.h
diff --git a/drivers/infiniband/ulp/isert/isert_base.h b/drivers/infiniband/ulp/isert/isert_base.h
new file mode 100644
index 0000000..a7c8bc9
--- /dev/null
+++ b/drivers/infiniband/ulp/isert/isert_base.h
@@ -0,0 +1,123 @@
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <rdma/ib_verbs.h>
+#include <rdma/ib_fmr_pool.h>
+#include <rdma/rdma_cm.h>
+
+#define ISERT_RDMA_LISTEN_BACKLOG 10
+
+enum isert_desc_type {
+ ISCSI_TX_CONTROL,
+ ISCSI_TX_DATAIN
+};
+
+enum iser_ib_op_code {
+ ISER_IB_RECV,
+ ISER_IB_SEND,
+ ISER_IB_RDMA_WRITE,
+ ISER_IB_RDMA_READ,
+};
+
+enum iser_conn_state {
+ ISER_CONN_INIT,
+ ISER_CONN_UP,
+ ISER_CONN_TERMINATING,
+ ISER_CONN_DOWN,
+};
+
+struct iser_rx_desc {
+ struct iser_hdr iser_header;
+ struct iscsi_hdr iscsi_header;
+ char data[ISER_RECV_DATA_SEG_LEN];
+ u64 dma_addr;
+ struct ib_sge rx_sg;
+ char pad[ISER_RX_PAD_SIZE];
+} __attribute__((packed));
+
+struct isert_rx_desc {
+ struct isert_conn *desc_conn;
+ struct work_struct desc_work;
+ struct iser_rx_desc desc;
+} __attribute__((packed));
+
+struct iser_tx_desc {
+ struct iser_hdr iser_header;
+ struct iscsi_hdr iscsi_header;
+ enum isert_desc_type type;
+ u64 dma_addr;
+ struct ib_sge tx_sg[2];
+ int num_sge;
+ struct isert_cmd *isert_cmd;
+ struct ib_send_wr send_wr;
+} __attribute__((packed));
+
+struct isert_rdma_wr {
+ struct list_head wr_list;
+ struct isert_cmd *isert_cmd;
+ enum iser_ib_op_code iser_ib_op;
+ struct ib_sge *ib_sge;
+ int num_sge;
+ struct scatterlist *sge;
+ int send_wr_num;
+ struct ib_send_wr *send_wr;
+};
+
+struct isert_cmd {
+ uint32_t read_stag;
+ uint32_t write_stag;
+ uint64_t read_va;
+ uint64_t write_va;
+ u64 sense_buf_dma;
+ u32 sense_buf_len;
+ u32 read_va_off;
+ u32 write_va_off;
+ u32 rdma_wr_num;
+ struct isert_conn *conn;
+ struct iscsi_cmd iscsi_cmd;
+ struct ib_sge *ib_sge;
+ struct iser_tx_desc tx_desc;
+ struct isert_rdma_wr rdma_wr;
+ struct work_struct comp_work;
+ struct kref cmd_kref;
+};
+
+struct isert_conn {
+ enum iser_conn_state state;
+ int post_recv_buf_count;
+ atomic_t post_send_buf_count;
+ u32 responder_resources;
+ u32 initiator_depth;
+ u32 max_sge;
+ char *login_buf;
+ char *login_req_buf;
+ char *login_rsp_buf;
+ u64 login_req_dma;
+ u64 login_rsp_dma;
+ unsigned int conn_rx_desc_head;
+ struct isert_rx_desc *conn_rx_descs;
+ struct ib_recv_wr conn_rx_wr[ISERT_MIN_POSTED_RX];
+ struct iscsi_conn *conn;
+ struct list_head conn_accept_node;
+ struct completion conn_login_comp;
+ struct iser_tx_desc conn_login_tx_desc;
+ struct rdma_cm_id *conn_cm_id;
+ struct ib_pd *conn_pd;
+ struct ib_cq *conn_rx_cq;
+ struct ib_cq *conn_tx_cq;
+ struct ib_mr *conn_mr;
+ struct ib_qp *conn_qp;
+ struct tasklet_struct conn_rx_tasklet;
+ struct tasklet_struct conn_tx_tasklet;
+ struct work_struct conn_logout_work;
+ wait_queue_head_t conn_wait;
+ struct kref conn_kref;
+};
+
+struct isert_np {
+ wait_queue_head_t np_accept_wq;
+ struct rdma_cm_id *np_cm_id;
+ struct mutex np_accept_mutex;
+ struct list_head np_accept_list;
+ struct completion np_login_comp;
+};
diff --git a/drivers/infiniband/ulp/isert/isert_proto.h b/drivers/infiniband/ulp/isert/isert_proto.h
new file mode 100644
index 0000000..ae38b92
--- /dev/null
+++ b/drivers/infiniband/ulp/isert/isert_proto.h
@@ -0,0 +1,47 @@
+/* From iscsi_iser.h */
+
+struct iser_hdr {
+ u8 flags;
+ u8 rsvd[3];
+ __be32 write_stag; /* write rkey */
+ __be64 write_va;
+ __be32 read_stag; /* read rkey */
+ __be64 read_va;
+} __attribute__((packed));
+
+/*Constant PDU lengths calculations */
+#define ISER_HEADERS_LEN (sizeof(struct iser_hdr) + sizeof(struct iscsi_hdr))
+
+#define ISER_RECV_DATA_SEG_LEN 8192
+#define ISER_RX_PAYLOAD_SIZE (ISER_HEADERS_LEN + ISER_RECV_DATA_SEG_LEN)
+#define ISER_RX_LOGIN_SIZE (ISER_HEADERS_LEN + ISCSI_DEF_MAX_RECV_SEG_LEN)
+
+/* QP settings */
+/* Maximal bounds on received asynchronous PDUs */
+#define ISERT_MAX_TX_MISC_PDUS 4 /* NOOP_IN(2) , ASYNC_EVENT(2) */
+
+#define ISERT_MAX_RX_MISC_PDUS 6 /* NOOP_OUT(2), TEXT(1), *
+ * SCSI_TMFUNC(2), LOGOUT(1) */
+
+#define ISCSI_DEF_XMIT_CMDS_MAX 128 /* from libiscsi.h, must be power of 2 */
+
+#define ISERT_QP_MAX_RECV_DTOS (ISCSI_DEF_XMIT_CMDS_MAX)
+
+#define ISERT_MIN_POSTED_RX (ISCSI_DEF_XMIT_CMDS_MAX >> 2)
+
+#define ISERT_INFLIGHT_DATAOUTS 8
+
+#define ISERT_QP_MAX_REQ_DTOS (ISCSI_DEF_XMIT_CMDS_MAX * \
+ (1 + ISERT_INFLIGHT_DATAOUTS) + \
+ ISERT_MAX_TX_MISC_PDUS + \
+ ISERT_MAX_RX_MISC_PDUS)
+
+#define ISER_RX_PAD_SIZE (16384 - (ISER_RX_PAYLOAD_SIZE + \
+ sizeof(u64) + sizeof(struct ib_sge)))
+
+#define ISER_VER 0x10
+#define ISER_WSV 0x08
+#define ISER_RSV 0x04
+#define ISCSI_CTRL 0x10
+#define ISER_HELLO 0x20
+#define ISER_HELLORPLY 0x30
--
1.7.2.5
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