net/smc/smc_tx.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Shared Memory Communications over RDMA (SMC-R) and RoCE
   4  *
   5  * Manage send buffer
   6  *
   7  * Copyright IBM Corp. 2016
   8  *
   9  * Author(s):  Ursula Braun <ubraun@linux.vnet.ibm.com>
  10  */
  11
  12 #ifndef SMC_TX_H
  13 #define SMC_TX_H
  14
  15 #include <linux/socket.h>
  16 #include <linux/types.h>
  17
  18 #include "smc.h"
  19 #include "smc_cdc.h"
  20
  21 static inline int smc_tx_prepared_sends(struct smc_connection *conn)
  22 {
  23         union smc_host_cursor sent, prep;
  24
  25         smc_curs_write(&sent, smc_curs_read(&conn->tx_curs_sent, conn), conn);
  26         smc_curs_write(&prep, smc_curs_read(&conn->tx_curs_prep, conn), conn);
  27         return smc_curs_diff(conn->sndbuf_size, &sent, &prep);
  28 }
  29
  30 void smc_tx_init(struct smc_sock *smc);
  31 int smc_tx_sendmsg(struct smc_sock *smc, struct msghdr *msg, size_t len);
  32 int smc_tx_sndbuf_nonempty(struct smc_connection *conn);
  33 void smc_tx_sndbuf_nonfull(struct smc_sock *smc);
  34 void smc_tx_consumer_update(struct smc_connection *conn);
  35
  36 #endif /* SMC_TX_H */