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Message-Id: <20230923031031.21434-1-rohan.g.thomas@intel.com>
Date: Sat, 23 Sep 2023 11:10:31 +0800
From: Rohan G Thomas <rohan.g.thomas@...el.com>
To: "David S . Miller" <davem@...emloft.net>,
Alexandre Torgue <alexandre.torgue@...s.st.com>,
Jose Abreu <joabreu@...opsys.com>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Maxime Coquelin <mcoquelin.stm32@...il.com>
Cc: netdev@...r.kernel.org,
linux-stm32@...md-mailman.stormreply.com,
linux-arm-kernel@...ts.infradead.org,
devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org,
Rohan G Thomas <rohan.g.thomas@...el.com>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH net-next 1/1] net: stmmac: xgmac: EST interrupts handling
Enabled the following EST related interrupts:
1) Constant Gate Control Error (CGCE)
2) Head-of-Line Blocking due to Scheduling (HLBS)
3) Head-of-Line Blocking due to Frame Size (HLBF)
4) Base Time Register error (BTRE)
5) Switch to S/W owned list Complete (SWLC)
Also, add EST errors into the ethtool statistic.
The commit e49aa315cb01 ("net: stmmac: EST interrupts handling and
error reporting") and commit 9f298959191b ("net: stmmac: Add EST
errors into ethtool statistic") add EST interrupts handling and error
reporting support to DWMAC4 core. This patch enables the same support
for XGMAC.
Signed-off-by: Rohan G Thomas <rohan.g.thomas@...el.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
.../net/ethernet/stmicro/stmmac/dwxgmac2.h | 27 ++++++
.../ethernet/stmicro/stmmac/dwxgmac2_core.c | 89 +++++++++++++++++++
2 files changed, 116 insertions(+)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
index 7a8f47e7b728..75782b8cdfe9 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
+++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
@@ -289,6 +289,33 @@
#define XGMAC_PTOV_SHIFT 23
#define XGMAC_SSWL BIT(1)
#define XGMAC_EEST BIT(0)
+#define XGMAC_MTL_EST_STATUS 0x00001058
+#define XGMAC_BTRL GENMASK(15, 8)
+#define XGMAC_BTRL_SHIFT 8
+#define XGMAC_BTRL_MAX GENMASK(15, 8)
+#define XGMAC_CGCE BIT(4)
+#define XGMAC_HLBS BIT(3)
+#define XGMAC_HLBF BIT(2)
+#define XGMAC_BTRE BIT(1)
+#define XGMAC_SWLC BIT(0)
+#define XGMAC_MTL_EST_SCH_ERR 0x00001060
+#define XGMAC_MTL_EST_FRM_SZ_ERR 0x00001064
+#define XGMAC_MTL_EST_FRM_SZ_CAP 0x00001068
+#define XGMAC_SZ_CAP_HBFS_MASK GENMASK(14, 0)
+#define XGMAC_SZ_CAP_HBFQ_SHIFT 16
+#define XGMAC_SZ_CAP_HBFQ_MASK(val) \
+ ({ \
+ typeof(val) _val = (val); \
+ (_val > 4 ? GENMASK(18, 16) : \
+ _val > 2 ? GENMASK(17, 16) : \
+ BIT(16)); \
+ })
+#define XGMAC_MTL_EST_INT_EN 0x00001070
+#define XGMAC_IECGCE BIT(4)
+#define XGMAC_IEHS BIT(3)
+#define XGMAC_IEHF BIT(2)
+#define XGMAC_IEBE BIT(1)
+#define XGMAC_IECC BIT(0)
#define XGMAC_MTL_EST_GCL_CONTROL 0x00001080
#define XGMAC_BTR_LOW 0x0
#define XGMAC_BTR_HIGH 0x1
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c
index f352be269deb..0af0aefa6656 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c
@@ -1469,9 +1469,97 @@ static int dwxgmac3_est_configure(void __iomem *ioaddr, struct stmmac_est *cfg,
ctrl &= ~XGMAC_EEST;
writel(ctrl, ioaddr + XGMAC_MTL_EST_CONTROL);
+
+ /* Configure EST interrupt */
+ if (cfg->enable)
+ ctrl = XGMAC_IECGCE | XGMAC_IEHS | XGMAC_IEHF | XGMAC_IEBE |
+ XGMAC_IECC;
+ else
+ ctrl = 0;
+
+ writel(ctrl, ioaddr + XGMAC_MTL_EST_INT_EN);
return 0;
}
+static void dwxgmac3_est_irq_status(void __iomem *ioaddr,
+ struct net_device *dev,
+ struct stmmac_extra_stats *x, u32 txqcnt)
+{
+ u32 status, value, feqn, hbfq, hbfs, btrl;
+ u32 txqcnt_mask = BIT(txqcnt) - 1;
+
+ status = readl(ioaddr + XGMAC_MTL_EST_STATUS);
+
+ value = XGMAC_CGCE | XGMAC_HLBS | XGMAC_HLBF | XGMAC_BTRE | XGMAC_SWLC;
+
+ /* Return if there is no error */
+ if (!(status & value))
+ return;
+
+ if (status & XGMAC_CGCE) {
+ /* Clear Interrupt */
+ writel(XGMAC_CGCE, ioaddr + XGMAC_MTL_EST_STATUS);
+
+ x->mtl_est_cgce++;
+ }
+
+ if (status & XGMAC_HLBS) {
+ value = readl(ioaddr + XGMAC_MTL_EST_SCH_ERR);
+ value &= txqcnt_mask;
+
+ x->mtl_est_hlbs++;
+
+ /* Clear Interrupt */
+ writel(value, ioaddr + XGMAC_MTL_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 & XGMAC_HLBF) {
+ value = readl(ioaddr + XGMAC_MTL_EST_FRM_SZ_ERR);
+ feqn = value & txqcnt_mask;
+
+ value = readl(ioaddr + XGMAC_MTL_EST_FRM_SZ_CAP);
+ hbfq = (value & XGMAC_SZ_CAP_HBFQ_MASK(txqcnt)) >>
+ XGMAC_SZ_CAP_HBFQ_SHIFT;
+ hbfs = value & XGMAC_SZ_CAP_HBFS_MASK;
+
+ x->mtl_est_hlbf++;
+
+ /* Clear Interrupt */
+ writel(feqn, ioaddr + XGMAC_MTL_EST_FRM_SZ_ERR);
+
+ if (net_ratelimit())
+ netdev_err(dev, "EST: HLB(size) Queue %u Size %u\n",
+ hbfq, hbfs);
+ }
+
+ if (status & XGMAC_BTRE) {
+ if ((status & XGMAC_BTRL) == XGMAC_BTRL_MAX)
+ x->mtl_est_btrlm++;
+ else
+ x->mtl_est_btre++;
+
+ btrl = (status & XGMAC_BTRL) >> XGMAC_BTRL_SHIFT;
+
+ if (net_ratelimit())
+ netdev_info(dev, "EST: BTR Error Loop Count %u\n",
+ btrl);
+
+ writel(XGMAC_BTRE, ioaddr + XGMAC_MTL_EST_STATUS);
+ }
+
+ if (status & XGMAC_SWLC) {
+ writel(XGMAC_SWLC, ioaddr + XGMAC_MTL_EST_STATUS);
+ netdev_info(dev, "EST: SWOL has been switched\n");
+ }
+}
+
static void dwxgmac3_fpe_configure(void __iomem *ioaddr, u32 num_txq,
u32 num_rxq, bool enable)
{
@@ -1541,6 +1629,7 @@ const struct stmmac_ops dwxgmac210_ops = {
.config_l4_filter = dwxgmac2_config_l4_filter,
.set_arp_offload = dwxgmac2_set_arp_offload,
.est_configure = dwxgmac3_est_configure,
+ .est_irq_status = dwxgmac3_est_irq_status,
.fpe_configure = dwxgmac3_fpe_configure,
};
--
2.26.2
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