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55 lines
1.6 KiB
Diff
55 lines
1.6 KiB
Diff
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From c095bbc29eeae597c47c90d41fab472be9e14ca6 Mon Sep 17 00:00:00 2001
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From: Camelia Groza <camelia.groza@nxp.com>
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Date: Wed, 30 May 2018 15:26:47 +0300
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Subject: [PATCH] sdk_dpaa: ceetm: WQ/CEETM mode switchover cleanup
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Wait for the WQ TX FQs to empty before switching from WQ to CEETM mode.
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Signed-off-by: Camelia Groza <camelia.groza@nxp.com>
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---
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.../ethernet/freescale/sdk_dpaa/dpaa_eth_ceetm.c | 26 ++++++++++++++++++++++
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1 file changed, 26 insertions(+)
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--- a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_ceetm.c
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+++ b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_ceetm.c
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@@ -65,6 +65,31 @@ static void get_dcp_and_sp(struct net_de
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}
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}
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+/* Wait for the DPAA Eth driver WQ TX FQs to empty */
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+static void dpaa_drain_fqs(struct net_device *dev)
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+{
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+ const struct dpa_priv_s *priv = netdev_priv(dev);
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+ struct qm_mcr_queryfq_np np;
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+ struct qman_fq *fq;
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+ int ret, i;
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+
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+ for (i = 0; i < DPAA_ETH_TX_QUEUES; i ++) {
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+ fq = priv->egress_fqs[i];
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+ while (true) {
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+ ret = qman_query_fq_np(fq, &np);
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+ if (unlikely(ret)) {
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+ pr_err(KBUILD_BASENAME
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+ " : %s : unable to query FQ %x: %d\n",
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+ __func__, fq->fqid, ret);
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+ break;
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+ }
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+
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+ if (np.frm_cnt == 0)
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+ break;
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+ }
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+ }
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+}
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+
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/* Enqueue Rejection Notification callback */
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static void ceetm_ern(struct qman_portal *portal, struct qman_fq *fq,
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const struct qm_mr_entry *msg)
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@@ -1103,6 +1128,7 @@ static int ceetm_init(struct Qdisc *sch,
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switch (priv->type) {
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case CEETM_ROOT:
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netif_tx_stop_all_queues(dev);
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+ dpaa_drain_fqs(dev);
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ret = ceetm_init_root(sch, priv, qopt, extack);
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netif_tx_wake_all_queues(dev);
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break;
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