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smc: receive data from RMBE

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move RMBE data into user space buffer and update managing cursors

Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ursula Braun
2017-01-09 16:55:24 +01:00
committed by David S. Miller
parent e6727f3900
commit 952310ccf2
9 changed files with 304 additions and 3 deletions
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37
net/smc/smc_tx.c
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@@ -427,6 +427,43 @@ static void smc_tx_work(struct work_struct *work)
release_sock(&smc->sk);
}
void smc_tx_consumer_update(struct smc_connection *conn)
{
union smc_host_cursor cfed, cons;
struct smc_cdc_tx_pend *pend;
struct smc_wr_buf *wr_buf;
int to_confirm, rc;
smc_curs_write(&cons,
smc_curs_read(&conn->local_tx_ctrl.cons, conn),
conn);
smc_curs_write(&cfed,
smc_curs_read(&conn->rx_curs_confirmed, conn),
conn);
to_confirm = smc_curs_diff(conn->rmbe_size, &cfed, &cons);
if (conn->local_rx_ctrl.prod_flags.cons_curs_upd_req ||
((to_confirm > conn->rmbe_update_limit) &&
((to_confirm > (conn->rmbe_size / 2)) ||
conn->local_rx_ctrl.prod_flags.write_blocked))) {
rc = smc_cdc_get_free_slot(&conn->lgr->lnk[SMC_SINGLE_LINK],
&wr_buf, &pend);
if (!rc)
rc = smc_cdc_msg_send(conn, wr_buf, pend);
if (rc < 0) {
schedule_work(&conn->tx_work);
return;
}
smc_curs_write(&conn->rx_curs_confirmed,
smc_curs_read(&conn->local_tx_ctrl.cons, conn),
conn);
conn->local_rx_ctrl.prod_flags.cons_curs_upd_req = 0;
}
if (conn->local_rx_ctrl.prod_flags.write_blocked &&
!atomic_read(&conn->bytes_to_rcv))
conn->local_rx_ctrl.prod_flags.write_blocked = 0;
}
/***************************** send initialize *******************************/
/* Initialize send properties on connection establishment. NB: not __init! */