net/smc: introduce sg-logic for send buffers

[mirror_ubuntu-jammy-kernel.git] / net / smc / smc_core.h

diff --git a/net/smc/smc_core.h b/net/smc/smc_core.h
index b013cb43a327ea81cd8bc9e4a5ffff733f87f6a7..72c25cb3eb89bf849a4516d6083c5f5240253c67 100644 (file)
--- a/net/smc/smc_core.h
+++ b/net/smc/smc_core.h
@@ -37,6 +37,14 @@ struct smc_wr_buf {
        u8      raw[SMC_WR_BUF_SIZE];
 };
 
+#define SMC_WR_REG_MR_WAIT_TIME        (5 * HZ)/* wait time for ib_wr_reg_mr result */
+
+enum smc_wr_reg_state {
+       POSTED,         /* ib_wr_reg_mr request posted */
+       CONFIRMED,      /* ib_wr_reg_mr response: successful */
+       FAILED          /* ib_wr_reg_mr response: failure */
+};
+
 struct smc_link {
        struct smc_ib_device    *smcibdev;      /* ib-device */
        u8                      ibport;         /* port - values 1 | 2 */
@@ -65,6 +73,10 @@ struct smc_link {
        u64                     wr_rx_id;       /* seq # of last recv WR */
        u32                     wr_rx_cnt;      /* number of WR recv buffers */
 
+       struct ib_reg_wr        wr_reg;         /* WR register memory region */
+       wait_queue_head_t       wr_reg_wait;    /* wait for wr_reg result */
+       enum smc_wr_reg_state   wr_reg_state;   /* state of wr_reg request */
+
        union ib_gid            gid;            /* gid matching used vlan id */
        u32                     peer_qpn;       /* QP number of peer */
        enum ib_mtu             path_mtu;       /* used mtu */
@@ -90,14 +102,15 @@ struct smc_link {
 /* tx/rx buffer list element for sndbufs list and rmbs list of a lgr */
 struct smc_buf_desc {
        struct list_head        list;
-       u64                     dma_addr[SMC_LINKS_PER_LGR_MAX];
-                                               /* mapped address of buffer */
        void                    *cpu_addr;      /* virtual address of buffer */
-       u32                     rkey[SMC_LINKS_PER_LGR_MAX];
-                                               /* for rmb only:
-                                                * rkey provided to peer
+       struct sg_table         sgt[SMC_LINKS_PER_LGR_MAX];/* virtual buffer */
+       struct ib_mr            *mr_rx[SMC_LINKS_PER_LGR_MAX];
+                                               /* for rmb only: memory region
+                                                * incl. rkey provided to peer
                                                 */
+       u32                     order;          /* allocation order */
        u32                     used;           /* currently used / unused */
+       bool                    reused;         /* new created / reused */
 };
 
 struct smc_rtoken {                            /* address/key of remote RMB */
@@ -177,5 +190,4 @@ int smc_sndbuf_create(struct smc_sock *smc);
 int smc_rmb_create(struct smc_sock *smc);
 int smc_rmb_rtoken_handling(struct smc_connection *conn,
                            struct smc_clc_msg_accept_confirm *clc);
-
 #endif