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
smc_tx_prepared_sends(struct smc_connection * conn)21 static inline int smc_tx_prepared_sends(struct smc_connection *conn)
22 {
23 struct smc_buf_desc *sndbuf_desc = READ_ONCE(conn->sndbuf_desc);
24 union smc_host_cursor sent, prep;
25
26 if (!sndbuf_desc)
27 return 0;
28
29 smc_curs_copy(&sent, &conn->tx_curs_sent, conn);
30 smc_curs_copy(&prep, &conn->tx_curs_prep, conn);
31 return smc_curs_diff(sndbuf_desc->len, &sent, &prep);
32 }
33
34 void smc_tx_pending(struct smc_connection *conn);
35 void smc_tx_work(struct work_struct *work);
36 void smc_tx_init(struct smc_sock *smc);
37 int smc_tx_sendmsg(struct smc_sock *smc, struct msghdr *msg, size_t len);
38 int smc_tx_sndbuf_nonempty(struct smc_connection *conn);
39 void smc_tx_sndbuf_nonfull(struct smc_sock *smc);
40 void smc_tx_consumer_update(struct smc_connection *conn, bool force);
41 int smcd_tx_ism_write(struct smc_connection *conn, void *data, size_t len,
42 u32 offset, int signal);
43
44 #endif /* SMC_TX_H */
45