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| author | Prabhakar Kushwaha <prabhakar@freescale.com> | 2015-07-02 11:29:06 +0530 |
|---|---|---|
| committer | York Sun <yorksun@freescale.com> | 2015-07-20 11:44:37 -0700 |
| commit | b4c3a35dc07380e931f6a0bd49332703769352b5 (patch) | |
| tree | 8747680c7ad7229f5a1c51dbab318d0fb393cef1 /drivers | |
| parent | e48df52b69069dac7f00841fc89701604c5f1bef (diff) | |
| download | u-boot-imx-b4c3a35dc07380e931f6a0bd49332703769352b5.zip u-boot-imx-b4c3a35dc07380e931f6a0bd49332703769352b5.tar.gz u-boot-imx-b4c3a35dc07380e931f6a0bd49332703769352b5.tar.bz2 | |
driver/ldpaa_eth: Add timeout handling DQRR entry read
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>
Reviewed-by: York Sun <yorksun@freescale.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ldpaa_eth/ldpaa_eth.c | 36 |
1 files 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; } } |