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net/dpaa2: enable Tx congestion state check

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For larger packet size congestion is observed on Tx Queues.
This patch enables Tx Queue congestion state check support.
If congested, try to resend the packet few times.

Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
Signed-off-by: Hemant Agrawal <hemant.agrawal@nxp.com>
This commit is contained in:
Hemant Agrawal 2017-07-24 13:01:46 +05:30 committed by Thomas Monjalon
parent a2c0df7503
commit a084096398
3 changed files with 12 additions and 5 deletions
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2
drivers/net/dpaa2/dpaa2_ethdev.c
View File

@ -488,7 +488,7 @@ dpaa2_dev_tx_queue_setup(struct rte_eth_dev *dev,
}
dpaa2_q->tc_index = tc_id;
if (priv->flags & DPAA2_TX_CGR_SUPPORT) {
if (!(priv->flags & DPAA2_TX_CGR_OFF)) {
struct dpni_congestion_notification_cfg cong_notif_cfg;
cong_notif_cfg.units = DPNI_CONGESTION_UNIT_FRAMES;

4
drivers/net/dpaa2/dpaa2_ethdev.h
View File

@ -55,6 +55,8 @@
*/
#define CONG_EXIT_TX_THRESHOLD 480
#define CONG_RETRY_COUNT 18000
/* RX queue tail drop threshold
* currently considering 32 KB packets
*/
@ -66,7 +68,7 @@
/* Enable TX Congestion control support
* default is disable
*/
#define DPAA2_TX_CGR_SUPPORT 0x01
#define DPAA2_TX_CGR_OFF 0x01
/* Disable RX tail drop, default is enable */
#define DPAA2_RX_TAILDROP_OFF 0x04

11
drivers/net/dpaa2/dpaa2_rxtx.c
View File

@ -524,7 +524,7 @@ uint16_t
dpaa2_dev_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
{
/* Function to transmit the frames to given device and VQ*/
uint32_t loop;
uint32_t loop, retry_count;
int32_t ret;
struct qbman_fd fd_arr[MAX_TX_RING_SLOTS];
struct rte_mbuf *mi;
@ -559,8 +559,13 @@ dpaa2_dev_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
/*Clear the unused FD fields before sending*/
while (nb_pkts) {
/*Check if the queue is congested*/
if (qbman_result_SCN_state_in_mem(dpaa2_q->cscn))
goto skip_tx;
retry_count = 0;
if (qbman_result_SCN_state_in_mem(dpaa2_q->cscn)) {
retry_count++;
/* Retry for some time before giving up */
if (retry_count > CONG_RETRY_COUNT)
goto skip_tx;
}
frames_to_send = (nb_pkts >> 3) ? MAX_TX_RING_SLOTS : nb_pkts;