linux-stable/net/smc/smc_tx.h
David Howells 2f8bc2bbb0 smc: Drop smc_sendpage() in favour of smc_sendmsg() + MSG_SPLICE_PAGES
Drop the smc_sendpage() code as smc_sendmsg() just passes the call down to
the underlying TCP socket and smc_tx_sendpage() is just a wrapper around
its sendmsg implementation.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Karsten Graul <kgraul@linux.ibm.com>
cc: Wenjia Zhang <wenjia@linux.ibm.com>
cc: Jan Karcher <jaka@linux.ibm.com>
cc: "D. Wythe" <alibuda@linux.alibaba.com>
cc: Tony Lu <tonylu@linux.alibaba.com>
cc: Wen Gu <guwen@linux.alibaba.com>
cc: Jens Axboe <axboe@kernel.dk>
cc: Matthew Wilcox <willy@infradead.org>
Link: https://lore.kernel.org/r/20230623225513.2732256-10-dhowells@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-06-24 15:50:12 -07:00

40 lines
1.1 KiB
C

/* 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_copy(&sent, &conn->tx_curs_sent, conn);
smc_curs_copy(&prep, &conn->tx_curs_prep, conn);
return smc_curs_diff(conn->sndbuf_desc->len, &sent, &prep);
}
void smc_tx_pending(struct smc_connection *conn);
void smc_tx_work(struct work_struct *work);
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, bool force);
int smcd_tx_ism_write(struct smc_connection *conn, void *data, size_t len,
u32 offset, int signal);
#endif /* SMC_TX_H */