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1b2fefb244
Refreshed patches, removed upstreamed patch: generic/pending: 001-v5.4-pinctrl-qcom-fix-wrong-write-in-update_dual_edge.patch.patch Run tested: qemu-x86-64 Build tested: x86/64, ath79/nand, imx6, sunxi/a53 Signed-off-by: Petr Štetiar <ynezz@true.cz>
87 lines
2.9 KiB
Diff
87 lines
2.9 KiB
Diff
From 7a342f60e569047e1632f6af91f503993769a2ec Mon Sep 17 00:00:00 2001
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From: Ioana Radulescu <ruxandra.radulescu@nxp.com>
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Date: Tue, 17 Sep 2019 19:51:15 +0300
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Subject: [PATCH] dpaa2-eth: Enable Rx PFC
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Instruct the hardware to respond to received PFC frames.
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Current firmware doesn't allow us to selectively enable PFC
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on the Rx side for some priorities only, so we will react to
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all incoming PFC frames (and stop transmitting on the traffic
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classes specified in the frame).
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PFC depends on the PAUSE flag also being set in link options.
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Don't set it implicitly when user configures PFC, but issue
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a warning if the two settings are not in sync.
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For the Tx side, setting the PFC_PAUSE flag in the link options
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is necessary but not sufficient, so PFC frame generation is
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not enabled yet.
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Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
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---
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drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c | 23 +++++++++++++++++++++++
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drivers/net/ethernet/freescale/dpaa2/dpni.h | 5 +++++
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2 files changed, 28 insertions(+)
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--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
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+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
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@@ -3618,6 +3618,9 @@ static int dpaa2_eth_dcbnl_ieee_getpfc(s
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{
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struct dpaa2_eth_priv *priv = netdev_priv(net_dev);
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+ if (!(priv->link_state.options & DPNI_LINK_OPT_PFC_PAUSE))
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+ return 0;
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+
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memcpy(pfc, &priv->pfc, sizeof(priv->pfc));
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pfc->pfc_cap = dpaa2_eth_tc_count(priv);
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@@ -3628,6 +3631,8 @@ static int dpaa2_eth_dcbnl_ieee_setpfc(s
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struct ieee_pfc *pfc)
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{
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struct dpaa2_eth_priv *priv = netdev_priv(net_dev);
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+ struct dpni_link_cfg link_cfg = {0};
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+ int err;
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if (pfc->mbc || pfc->delay)
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return -EOPNOTSUPP;
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@@ -3636,6 +3641,24 @@ static int dpaa2_eth_dcbnl_ieee_setpfc(s
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if (priv->pfc.pfc_en == pfc->pfc_en)
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return 0;
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+ /* We allow PFC configuration even if it won't have any effect until
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+ * general pause frames are enabled
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+ */
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+ if (!dpaa2_eth_rx_pause_enabled(priv->link_state.options))
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+ netdev_warn(net_dev, "Pause support must be enabled in order for PFC to work!\n");
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+
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+ link_cfg.rate = priv->link_state.rate;
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+ link_cfg.options = priv->link_state.options;
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+ if (pfc->pfc_en)
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+ link_cfg.options |= DPNI_LINK_OPT_PFC_PAUSE;
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+ else
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+ link_cfg.options &= ~DPNI_LINK_OPT_PFC_PAUSE;
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+ err = dpni_set_link_cfg(priv->mc_io, 0, priv->mc_token, &link_cfg);
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+ if (err) {
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+ netdev_err(net_dev, "dpni_set_link_cfg failed\n");
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+ return err;
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+ }
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+
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memcpy(&priv->pfc, pfc, sizeof(priv->pfc));
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return 0;
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--- a/drivers/net/ethernet/freescale/dpaa2/dpni.h
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+++ b/drivers/net/ethernet/freescale/dpaa2/dpni.h
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@@ -514,6 +514,11 @@ int dpni_get_statistics(struct fsl_mc_io
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#define DPNI_LINK_OPT_ASYM_PAUSE 0x0000000000000008ULL
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/**
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+ * Enable priority flow control pause frames
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+ */
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+#define DPNI_LINK_OPT_PFC_PAUSE 0x0000000000000010ULL
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+
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+/**
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* struct - Structure representing DPNI link configuration
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* @rate: Rate
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* @options: Mask of available options; use 'DPNI_LINK_OPT_<X>' values
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