net/smc/smc_tx.h

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