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path: root/drivers/net/ethernet/stmicro/stmmac/stmmac_est.c
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Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/stmmac_est.c')
-rw-r--r--drivers/net/ethernet/stmicro/stmmac/stmmac_est.c165
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,
+};