IB/iser: Introduce fast memory registration model (FRWR)

[firefly-linux-kernel-4.4.55.git] / drivers / infiniband / ulp / iser / iscsi_iser.h

diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.h b/drivers/infiniband/ulp/iser/iscsi_iser.h
index 75c535260e7892592262085fd24716e479f3e095..67914027c614d5a393d036fcce1ff3edda021a39 100644 (file)
--- a/drivers/infiniband/ulp/iser/iscsi_iser.h
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.h
@@ -211,7 +211,7 @@ struct iser_mem_reg {
        u64  va;
        u64  len;
        void *mem_h;
-       int  is_fmr;
+       int  is_mr;
 };
 
 struct iser_regd_buf {
@@ -277,6 +277,15 @@ struct iser_device {
                                                            enum iser_data_dir cmd_dir);
 };
 
+struct fast_reg_descriptor {
+       struct list_head                  list;
+       /* For fast registration - FRWR */
+       struct ib_mr                     *data_mr;
+       struct ib_fast_reg_page_list     *data_frpl;
+       /* Valid for fast registration flag */
+       bool                              valid;
+};
+
 struct iser_conn {
        struct iscsi_iser_conn       *iser_conn; /* iser conn for upcalls  */
        struct iscsi_endpoint        *ep;
@@ -307,6 +316,10 @@ struct iser_conn {
                        struct iser_page_vec    *page_vec; /* represents SG to fmr maps*
                                                            * maps serialized as tx is*/
                } fmr;
+               struct {
+                       struct list_head        pool;
+                       int                     pool_size;
+               } frwr;
        } fastreg;
 };
 
@@ -393,6 +406,8 @@ void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_task *task,
 
 int  iser_reg_rdma_mem_fmr(struct iscsi_iser_task *task,
                           enum iser_data_dir cmd_dir);
+int  iser_reg_rdma_mem_frwr(struct iscsi_iser_task *task,
+                           enum iser_data_dir cmd_dir);
 
 int  iser_connect(struct iser_conn   *ib_conn,
                  struct sockaddr_in *src_addr,
@@ -405,6 +420,8 @@ int  iser_reg_page_vec(struct iser_conn     *ib_conn,
 
 void iser_unreg_mem_fmr(struct iscsi_iser_task *iser_task,
                        enum iser_data_dir cmd_dir);
+void iser_unreg_mem_frwr(struct iscsi_iser_task *iser_task,
+                        enum iser_data_dir cmd_dir);
 
 int  iser_post_recvl(struct iser_conn *ib_conn);
 int  iser_post_recvm(struct iser_conn *ib_conn, int count);
@@ -421,4 +438,6 @@ int  iser_initialize_task_headers(struct iscsi_task *task,
 int iser_alloc_rx_descriptors(struct iser_conn *ib_conn, struct iscsi_session *session);
 int iser_create_fmr_pool(struct iser_conn *ib_conn, unsigned cmds_max);
 void iser_free_fmr_pool(struct iser_conn *ib_conn);
+int iser_create_frwr_pool(struct iser_conn *ib_conn, unsigned cmds_max);
+void iser_free_frwr_pool(struct iser_conn *ib_conn);
 #endif