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net/smc: preallocated memory for rdma work requests

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The work requests for rdma writes are built in local variables within
function smc_tx_rdma_write(). This violates the rule that the work
request storage has to stay till the work request is confirmed by
a completion queue response.
This patch introduces preallocated memory for these work requests.
The storage is allocated, once a link (and thus a queue pair) is
established.

Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ursula Braun
2019-02-04 13:44:44 +01:00
committed by David S. Miller
parent 53bc8d2af0
commit ad6f317f72
7 changed files with 92 additions and 33 deletions
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11
net/smc/smc_cdc.c
View File

@@ -21,13 +21,6 @@
/********************************** send *************************************/
struct smc_cdc_tx_pend {
struct smc_connection *conn; /* socket connection */
union smc_host_cursor cursor; /* tx sndbuf cursor sent */
union smc_host_cursor p_cursor; /* rx RMBE cursor produced */
u16 ctrl_seq; /* conn. tx sequence # */
};
/* handler for send/transmission completion of a CDC msg */
static void smc_cdc_tx_handler(struct smc_wr_tx_pend_priv *pnd_snd,
struct smc_link *link,
@@ -61,12 +54,14 @@ static void smc_cdc_tx_handler(struct smc_wr_tx_pend_priv *pnd_snd,
int smc_cdc_get_free_slot(struct smc_connection *conn,
struct smc_wr_buf **wr_buf,
struct smc_rdma_wr **wr_rdma_buf,
struct smc_cdc_tx_pend **pend)
{
struct smc_link *link = &conn->lgr->lnk[SMC_SINGLE_LINK];
int rc;
rc = smc_wr_tx_get_free_slot(link, smc_cdc_tx_handler, wr_buf,
wr_rdma_buf,
(struct smc_wr_tx_pend_priv **)pend);
if (!conn->alert_token_local)
/* abnormal termination */
@@ -121,7 +116,7 @@ static int smcr_cdc_get_slot_and_msg_send(struct smc_connection *conn)
struct smc_wr_buf *wr_buf;
int rc;
rc = smc_cdc_get_free_slot(conn, &wr_buf, &pend);
rc = smc_cdc_get_free_slot(conn, &wr_buf, NULL, &pend);
if (rc)
return rc;