[people/arne_f/kernel.git] / net / smc / smc_tx.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Shared Memory Communications over RDMA (SMC-R) and RoCE
 *
 * Manage send buffer
 *
 * Copyright IBM Corp. 2016
 *
 * Author(s):  Ursula Braun <ubraun@linux.vnet.ibm.com>
 */

#ifndef SMC_TX_H
#define SMC_TX_H

#include <linux/socket.h>
#include <linux/types.h>

#include "smc.h"
#include "smc_cdc.h"

static inline int smc_tx_prepared_sends(struct smc_connection *conn)
{
	union smc_host_cursor sent, prep;

	smc_curs_write(&sent, smc_curs_read(&conn->tx_curs_sent, conn), conn);
	smc_curs_write(&prep, smc_curs_read(&conn->tx_curs_prep, conn), conn);
	return smc_curs_diff(conn->sndbuf_size, &sent, &prep);
}

void smc_tx_init(struct smc_sock *smc);
int smc_tx_sendmsg(struct smc_sock *smc, struct msghdr *msg, size_t len);
int smc_tx_sndbuf_nonempty(struct smc_connection *conn);
void smc_tx_sndbuf_nonfull(struct smc_sock *smc);
void smc_tx_consumer_update(struct smc_connection *conn);

#endif /* SMC_TX_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
e6727f39 UB	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);
952310cc	34	void smc_tx_consumer_update(struct smc_connection *conn);
e6727f39 UB	35
e6727f39 UB	36	#endif /* SMC_TX_H */