Volatile command does not return frame immidiately, need to wait till a frame is available in DQRR. Ideally it should be a blocking call.
Add timeout handling for DQRR frame instead of retry counter.
Signed-off-by: Prabhakar Kushwaha prabhakar@freescale.com Acked-by: Joe Hershberger joe.hershberger@ni.com --- Changes for v2: Sending as it is for patchset Changes for v3: Incorporated Joe Hershberger's comments - Use err variable instead of err = 1 Changes for v4: Sending as it is for patchset
drivers/net/ldpaa_eth/ldpaa_eth.c | 36 ++++++++++++++++++++++-------------- 1 file changed, 22 insertions(+), 14 deletions(-)
diff --git a/drivers/net/ldpaa_eth/ldpaa_eth.c b/drivers/net/ldpaa_eth/ldpaa_eth.c index 82c0ce7..cc949f5 100644 --- a/drivers/net/ldpaa_eth/ldpaa_eth.c +++ b/drivers/net/ldpaa_eth/ldpaa_eth.c @@ -77,7 +77,9 @@ static int ldpaa_eth_pull_dequeue_rx(struct eth_device *dev) struct ldpaa_eth_priv *priv = (struct ldpaa_eth_priv *)dev->priv; const struct ldpaa_dq *dq; const struct dpaa_fd *fd; - int i = 5, err = 0, status, loop = 20; + int i = 5, err = 0, status; + u32 timeo = (CONFIG_SYS_HZ * 2) / 1000; + u32 time_start; static struct qbman_pull_desc pulldesc; struct qbman_swp *swp = dflt_dpio->sw_portal;
@@ -92,13 +94,11 @@ static int ldpaa_eth_pull_dequeue_rx(struct eth_device *dev) continue; }
- do { - loop--; - dq = qbman_swp_dqrr_next(swp); + time_start = get_timer(0);
- if (!loop) - break; - } while (!dq); + do { + dq = qbman_swp_dqrr_next(swp); + } while (get_timer(time_start) < timeo && !dq);
if (dq) { /* Check for valid frame. If not sent a consume @@ -121,6 +121,10 @@ static int ldpaa_eth_pull_dequeue_rx(struct eth_device *dev) ldpaa_eth_rx(priv, fd); qbman_swp_dqrr_consume(swp, dq); break; + } else { + err = -ENODATA; + debug("No DQRR entries\n"); + break; } }
@@ -167,7 +171,9 @@ static int ldpaa_eth_pull_dequeue_tx_conf(struct ldpaa_eth_priv *priv) const struct ldpaa_dq *dq; const struct dpaa_fd *fd; int err = 0; - int i = 5, status, loop = 20; + int i = 5, status; + u32 timeo = (CONFIG_SYS_HZ * 10) / 1000; + u32 time_start; static struct qbman_pull_desc pulldesc; struct qbman_swp *swp = dflt_dpio->sw_portal;
@@ -182,13 +188,11 @@ static int ldpaa_eth_pull_dequeue_tx_conf(struct ldpaa_eth_priv *priv) continue; }
- do { - loop--; - dq = qbman_swp_dqrr_next(swp); + time_start = get_timer(0);
- if (!loop) - break; - } while (!dq); + do { + dq = qbman_swp_dqrr_next(swp); + } while (get_timer(time_start) < timeo && !dq);
if (dq) { /* Check for valid frame. If not sent a consume @@ -209,6 +213,10 @@ static int ldpaa_eth_pull_dequeue_tx_conf(struct ldpaa_eth_priv *priv) ldpaa_eth_tx_conf(priv, fd); qbman_swp_dqrr_consume(swp, dq); break; + } else { + err = -ENODATA; + debug("No DQRR entries\n"); + break; } }