Merging upstream version 6.8.9.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 165 insertions, 0 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_est.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_est.c
new file mode 100644
index 0000000000..4da6ccc17c
--- /dev/null
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_est.c
@@ -0,0 +1,165 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2023, Intel Corporation
+ * stmmac EST(802.3 Qbv) handling
+ */
+#include <linux/iopoll.h>
+#include <linux/types.h>
+#include "stmmac.h"
+#include "stmmac_est.h"
+
+static int est_write(void __iomem *est_addr, u32 reg, u32 val, bool gcl)
+{
+	u32 ctrl;
+
+	writel(val, est_addr + EST_GCL_DATA);
+
+	ctrl = (reg << EST_ADDR_SHIFT);
+	ctrl |= gcl ? 0 : EST_GCRR;
+	writel(ctrl, est_addr + EST_GCL_CONTROL);
+
+	ctrl |= EST_SRWO;
+	writel(ctrl, est_addr + EST_GCL_CONTROL);
+
+	return readl_poll_timeout(est_addr + EST_GCL_CONTROL, ctrl,
+				  !(ctrl & EST_SRWO), 100, 5000);
+}
+
+static int est_configure(struct stmmac_priv *priv, struct stmmac_est *cfg,
+			 unsigned int ptp_rate)
+{
+	void __iomem *est_addr = priv->estaddr;
+	int i, ret = 0;
+	u32 ctrl;
+
+	ret |= est_write(est_addr, EST_BTR_LOW, cfg->btr[0], false);
+	ret |= est_write(est_addr, EST_BTR_HIGH, cfg->btr[1], false);
+	ret |= est_write(est_addr, EST_TER, cfg->ter, false);
+	ret |= est_write(est_addr, EST_LLR, cfg->gcl_size, false);
+	ret |= est_write(est_addr, EST_CTR_LOW, cfg->ctr[0], false);
+	ret |= est_write(est_addr, EST_CTR_HIGH, cfg->ctr[1], false);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < cfg->gcl_size; i++) {
+		ret = est_write(est_addr, i, cfg->gcl[i], true);
+		if (ret)
+			return ret;
+	}
+
+	ctrl = readl(est_addr + EST_CONTROL);
+	if (priv->plat->has_xgmac) {
+		ctrl &= ~EST_XGMAC_PTOV;
+		ctrl |= ((NSEC_PER_SEC / ptp_rate) * EST_XGMAC_PTOV_MUL) <<
+			 EST_XGMAC_PTOV_SHIFT;
+	} else {
+		ctrl &= ~EST_GMAC5_PTOV;
+		ctrl |= ((NSEC_PER_SEC / ptp_rate) * EST_GMAC5_PTOV_MUL) <<
+			 EST_GMAC5_PTOV_SHIFT;
+	}
+	if (cfg->enable)
+		ctrl |= EST_EEST | EST_SSWL;
+	else
+		ctrl &= ~EST_EEST;
+
+	writel(ctrl, est_addr + EST_CONTROL);
+
+	/* Configure EST interrupt */
+	if (cfg->enable)
+		ctrl = EST_IECGCE | EST_IEHS | EST_IEHF | EST_IEBE | EST_IECC;
+	else
+		ctrl = 0;
+
+	writel(ctrl, est_addr + EST_INT_EN);
+
+	return 0;
+}
+
+static void est_irq_status(struct stmmac_priv *priv, struct net_device *dev,
+			   struct stmmac_extra_stats *x, u32 txqcnt)
+{
+	u32 status, value, feqn, hbfq, hbfs, btrl, btrl_max;
+	void __iomem *est_addr = priv->estaddr;
+	u32 txqcnt_mask = BIT(txqcnt) - 1;
+
+	status = readl(est_addr + EST_STATUS);
+
+	value = EST_CGCE | EST_HLBS | EST_HLBF | EST_BTRE | EST_SWLC;
+
+	/* Return if there is no error */
+	if (!(status & value))
+		return;
+
+	if (status & EST_CGCE) {
+		/* Clear Interrupt */
+		writel(EST_CGCE, est_addr + EST_STATUS);
+
+		x->mtl_est_cgce++;
+	}
+
+	if (status & EST_HLBS) {
+		value = readl(est_addr + EST_SCH_ERR);
+		value &= txqcnt_mask;
+
+		x->mtl_est_hlbs++;
+
+		/* Clear Interrupt */
+		writel(value, est_addr + EST_SCH_ERR);
+
+		/* Collecting info to shows all the queues that has HLBS
+		 * issue. The only way to clear this is to clear the
+		 * statistic
+		 */
+		if (net_ratelimit())
+			netdev_err(dev, "EST: HLB(sched) Queue 0x%x\n", value);
+	}
+
+	if (status & EST_HLBF) {
+		value = readl(est_addr + EST_FRM_SZ_ERR);
+		feqn = value & txqcnt_mask;
+
+		value = readl(est_addr + EST_FRM_SZ_CAP);
+		hbfq = (value & EST_SZ_CAP_HBFQ_MASK(txqcnt)) >>
+			EST_SZ_CAP_HBFQ_SHIFT;
+		hbfs = value & EST_SZ_CAP_HBFS_MASK;
+
+		x->mtl_est_hlbf++;
+
+		/* Clear Interrupt */
+		writel(feqn, est_addr + EST_FRM_SZ_ERR);
+
+		if (net_ratelimit())
+			netdev_err(dev, "EST: HLB(size) Queue %u Size %u\n",
+				   hbfq, hbfs);
+	}
+
+	if (status & EST_BTRE) {
+		if (priv->plat->has_xgmac) {
+			btrl = FIELD_GET(EST_XGMAC_BTRL, status);
+			btrl_max = FIELD_MAX(EST_XGMAC_BTRL);
+		} else {
+			btrl = FIELD_GET(EST_GMAC5_BTRL, status);
+			btrl_max = FIELD_MAX(EST_GMAC5_BTRL);
+		}
+		if (btrl == btrl_max)
+			x->mtl_est_btrlm++;
+		else
+			x->mtl_est_btre++;
+
+		if (net_ratelimit())
+			netdev_info(dev, "EST: BTR Error Loop Count %u\n",
+				    btrl);
+
+		writel(EST_BTRE, est_addr + EST_STATUS);
+	}
+
+	if (status & EST_SWLC) {
+		writel(EST_SWLC, est_addr + EST_STATUS);
+		netdev_info(dev, "EST: SWOL has been switched\n");
+	}
+}
+
+const struct stmmac_est_ops dwmac510_est_ops = {
+	.configure = est_configure,
+	.irq_status = est_irq_status,
+};