Commit e48df52b authored by Prabhakar Kushwaha's avatar Prabhakar Kushwaha Committed by York Sun

driver/ldpaa_eth: Retry enqueue if portal was busy

Do not immediately return if the enqueue function returns -EBUSY; re-try
mulitple times.

if timeout occures, release the buffer.
Signed-off-by: default avatarPrabhakar Kushwaha <prabhakar@freescale.com>
Acked-by: default avatarJoe Hershberger <joe.hershberger@ni.com>
Reviewed-by: default avatarYork Sun <yorksun@freescale.com>
parent 70e52d21
......@@ -221,8 +221,11 @@ static int ldpaa_eth_tx(struct eth_device *net_dev, void *buf, int len)
struct dpaa_fd fd;
u64 buffer_start;
int data_offset, err;
u32 timeo = (CONFIG_SYS_HZ * 10) / 1000;
u32 time_start;
struct qbman_swp *swp = dflt_dpio->sw_portal;
struct qbman_eq_desc ed;
struct qbman_release_desc releasedesc;
/* Setup the FD fields */
memset(&fd, 0, sizeof(fd));
......@@ -258,9 +261,20 @@ static int ldpaa_eth_tx(struct eth_device *net_dev, void *buf, int len)
qbman_eq_desc_clear(&ed);
qbman_eq_desc_set_no_orp(&ed, 0);
qbman_eq_desc_set_qd(&ed, priv->tx_qdid, priv->tx_flow_id, 0);
err = qbman_swp_enqueue(swp, &ed, (const struct qbman_fd *)(&fd));
if (err < 0)
time_start = get_timer(0);
while (get_timer(time_start) < timeo) {
err = qbman_swp_enqueue(swp, &ed,
(const struct qbman_fd *)(&fd));
if (err != -EBUSY)
break;
}
if (err < 0) {
printf("error enqueueing Tx frame\n");
goto error;
}
mdelay(1);
......@@ -269,6 +283,20 @@ static int ldpaa_eth_tx(struct eth_device *net_dev, void *buf, int len)
printf("error Tx Conf frame\n");
return err;
error:
qbman_release_desc_clear(&releasedesc);
qbman_release_desc_set_bpid(&releasedesc, dflt_dpbp->dpbp_attr.bpid);
time_start = get_timer(0);
do {
/* Release buffer into the QBMAN */
err = qbman_swp_release(swp, &releasedesc, &buffer_start, 1);
} while (get_timer(time_start) < timeo && err == -EBUSY);
if (err == -EBUSY)
printf("TX data: QBMAN buffer release fails\n");
return err;
}
static int ldpaa_eth_open(struct eth_device *net_dev, bd_t *bd)
......
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