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hc

2024-05-10 10ebd8556b7990499c896a550e3d416b444211e6

 kernel/net/smc/smc_cdc.h
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@@ -48,21 +48,31 @@
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 	struct smc_cdc_producer_flags	prod_flags;
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 	struct smc_cdc_conn_state_flags	conn_state_flags;
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 	u8				reserved[18];
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-} __packed;					/* format defined in RFC7609 */
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+};
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+
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+/* SMC-D cursor format */
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+union smcd_cdc_cursor {
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+	struct {
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+		u16	wrap;
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+		u32	count;
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+		struct smc_cdc_producer_flags	prod_flags;
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+		struct smc_cdc_conn_state_flags	conn_state_flags;
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+	} __packed;
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+#ifdef KERNEL_HAS_ATOMIC64
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+	atomic64_t		acurs;		/* for atomic processing */
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+#else
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+	u64			acurs;		/* for atomic processing */
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+#endif
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+} __aligned(8);
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 /* CDC message for SMC-D */
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 struct smcd_cdc_msg {
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 	struct smc_wr_rx_hdr common;	/* Type = 0xFE */
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 	u8 res1[7];
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-	u16 prod_wrap;
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-	u32 prod_count;
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-	u8 res2[2];
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-	u16 cons_wrap;
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-	u32 cons_count;
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-	struct smc_cdc_producer_flags	prod_flags;
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-	struct smc_cdc_conn_state_flags conn_state_flags;
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+	union smcd_cdc_cursor	prod;
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+	union smcd_cdc_cursor	cons;
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 	u8 res3[8];
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-} __packed;
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+} __aligned(8);
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 static inline bool smc_cdc_rxed_any_close(struct smc_connection *conn)
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 {
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@@ -87,23 +97,6 @@
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 	}
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 }
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-/* SMC cursors are 8 bytes long and require atomic reading and writing */
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-static inline u64 smc_curs_read(union smc_host_cursor *curs,
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-				struct smc_connection *conn)
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-{
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-#ifndef KERNEL_HAS_ATOMIC64
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-	unsigned long flags;
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-	u64 ret;
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-
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-	spin_lock_irqsave(&conn->acurs_lock, flags);
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-	ret = curs->acurs;
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-	spin_unlock_irqrestore(&conn->acurs_lock, flags);
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-	return ret;
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-#else
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-	return atomic64_read(&curs->acurs);
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-#endif
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-}
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-
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 /* Copy cursor src into tgt */
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 static inline void smc_curs_copy(union smc_host_cursor *tgt,
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 				 union smc_host_cursor *src,
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@@ -123,6 +116,21 @@
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 static inline void smc_curs_copy_net(union smc_cdc_cursor *tgt,
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 				     union smc_cdc_cursor *src,
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 				     struct smc_connection *conn)
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+{
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+#ifndef KERNEL_HAS_ATOMIC64
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+	unsigned long flags;
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+
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+	spin_lock_irqsave(&conn->acurs_lock, flags);
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+	tgt->acurs = src->acurs;
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+	spin_unlock_irqrestore(&conn->acurs_lock, flags);
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+#else
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+	atomic64_set(&tgt->acurs, atomic64_read(&src->acurs));
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+#endif
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+}
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+
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+static inline void smcd_curs_copy(union smcd_cdc_cursor *tgt,
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+				  union smcd_cdc_cursor *src,
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+				  struct smc_connection *conn)
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 {
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 #ifndef KERNEL_HAS_ATOMIC64
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 	unsigned long flags;
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@@ -245,14 +253,20 @@
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 }
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 static inline void smcd_cdc_msg_to_host(struct smc_host_cdc_msg *local,
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-					struct smcd_cdc_msg *peer)
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+					struct smcd_cdc_msg *peer,
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+					struct smc_connection *conn)
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 {
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-	local->prod.wrap = peer->prod_wrap;
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-	local->prod.count = peer->prod_count;
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-	local->cons.wrap = peer->cons_wrap;
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-	local->cons.count = peer->cons_count;
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-	local->prod_flags = peer->prod_flags;
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-	local->conn_state_flags = peer->conn_state_flags;
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+	union smc_host_cursor temp;
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+
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+	temp.wrap = peer->prod.wrap;
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+	temp.count = peer->prod.count;
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+	smc_curs_copy(&local->prod, &temp, conn);
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+
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+	temp.wrap = peer->cons.wrap;
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+	temp.count = peer->cons.count;
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+	smc_curs_copy(&local->cons, &temp, conn);
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+	local->prod_flags = peer->cons.prod_flags;
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+	local->conn_state_flags = peer->cons.conn_state_flags;
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 }
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 static inline void smc_cdc_msg_to_host(struct smc_host_cdc_msg *local,
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@@ -260,21 +274,31 @@
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 				       struct smc_connection *conn)
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 {
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 	if (conn->lgr->is_smcd)
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-		smcd_cdc_msg_to_host(local, (struct smcd_cdc_msg *)peer);
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+		smcd_cdc_msg_to_host(local, (struct smcd_cdc_msg *)peer, conn);
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 	else
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 		smcr_cdc_msg_to_host(local, peer, conn);
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 }
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-struct smc_cdc_tx_pend;
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+struct smc_cdc_tx_pend {
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+	struct smc_connection	*conn;		/* socket connection */
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+	union smc_host_cursor	cursor;		/* tx sndbuf cursor sent */
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+	union smc_host_cursor	p_cursor;	/* rx RMBE cursor produced */
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+	u16			ctrl_seq;	/* conn. tx sequence # */
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+};
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 int smc_cdc_get_free_slot(struct smc_connection *conn,
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+			  struct smc_link *link,
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 			  struct smc_wr_buf **wr_buf,
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+			  struct smc_rdma_wr **wr_rdma_buf,
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 			  struct smc_cdc_tx_pend **pend);
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-void smc_cdc_tx_dismiss_slots(struct smc_connection *conn);
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+void smc_cdc_wait_pend_tx_wr(struct smc_connection *conn);
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 int smc_cdc_msg_send(struct smc_connection *conn, struct smc_wr_buf *wr_buf,
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 		     struct smc_cdc_tx_pend *pend);
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 int smc_cdc_get_slot_and_msg_send(struct smc_connection *conn);
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 int smcd_cdc_msg_send(struct smc_connection *conn);
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+int smcr_cdc_msg_send_validation(struct smc_connection *conn,
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+				 struct smc_cdc_tx_pend *pend,
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+				 struct smc_wr_buf *wr_buf);
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 int smc_cdc_init(void) __init;
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 void smcd_cdc_rx_init(struct smc_connection *conn);
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