* [PATCH net-next v12 0/7] net: stmmac: qcom-ethqos: add support for SCMI power domains
From: Bartosz Golaszewski @ 2026-07-06 13:20 UTC (permalink / raw)
To: Bjorn Andersson, Konrad Dybcio, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Andrew Lunn, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Maxime Coquelin, Alexandre Torgue,
Vinod Koul, Giuseppe Cavallaro, Chen-Yu Tsai, Jernej Skrabec,
Neil Armstrong, Kevin Hilman, Jerome Brunet, Shawn Guo,
Fabio Estevam, Jan Petrous, s32, Mohd Ayaan Anwar, Romain Gantois,
Geert Uytterhoeven, Magnus Damm, Maxime Ripard,
Christophe Roullier, Bartosz Golaszewski, Radu Rendec
Cc: linux-arm-msm, devicetree, linux-kernel, netdev, linux-stm32,
linux-arm-kernel, Drew Fustini, linux-sunxi, linux-amlogic,
linux-mips, imx, linux-renesas-soc, linux-rockchip, sophgo,
linux-riscv, brgl, Bartosz Golaszewski, Bartosz Golaszewski,
Krzysztof Kozlowski, Martin Blumenstingl, Lad Prabhakar
Add support for the firmware-managed variant of the DesignWare MAC on
the sa8255p platform. This series contains new DT bindings and driver
changes required to support the MAC in the STMMAC driver.
It also reorganizes the ethqos code quite a bit to make the introduction
of power domains into the driver a bit easier on the eye.
The DTS changes will go in separately.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
Changes in v12:
- Drop the power-domain-names from the SGMII PHY DT bindings
- Add missing Kconfig dependency on PM for the new SGMII PHY driver
- Link to v11: https://patch.msgid.link/20260629-qcom-sa8255p-emac-v11-0-1b7fb95b51f9@oss.qualcomm.com
Changes in v11:
- Take a new approach: add a dedicated driver for the firmware-managed
SGMII PHY and simplify changes made to the MAC driver
- Link to v10: https://patch.msgid.link/20260323-qcom-sa8255p-emac-v10-0-79302b238a16@oss.qualcomm.com
Changes in v10:
- Fix unit address in DT example
- Link to v9: https://patch.msgid.link/20260316-qcom-sa8255p-emac-v9-0-c58934e76ff2@oss.qualcomm.com
Changes in v9:
- Rebase on top of current linux-next again
- Link to v8: https://patch.msgid.link/20260311-qcom-sa8255p-emac-v8-0-58227bcf1018@oss.qualcomm.com
Changes in v8:
- Rebase on top of recent changes in linux-next which required an
extensive rework
- Drop partial R-b tags
- Link to v7: https://patch.msgid.link/20260306-qcom-sa8255p-emac-v7-0-d6a3013094b7@oss.qualcomm.com
Changes in v7:
- Restored the correct authorship after learning git uses .mailmap for
the --author switch
- Rebased on top of changes from Russell
- Fixed resource management issues in error paths
- Link to v6: https://lore.kernel.org/r/20260112-qcom-sa8255p-emac-v6-0-86a3d4b2ad83@oss.qualcomm.com
Changes in v6:
- Fix $id value in the bindings
- Drop patch 3/8 from the series
- Update init/exit callback signatures
- Link to v5: https://lore.kernel.org/r/20251107-qcom-sa8255p-emac-v5-0-01d3e3aaf388@linaro.org
- Link to v6: https://lore.kernel.org/r/20251219-qcom-sa8255p-emac-v6-0-487f1082461e@oss.qualcomm.com
Changes in v5:
- Name the DT binding document after the new compatbile
- Add missing space
- Make the power-domains limits stricter
- Link to v4: https://lore.kernel.org/r/20251104-qcom-sa8255p-emac-v4-0-f76660087cea@linaro.org
Changes in v4:
- Remove the phys property from the SCMI bindings
- Mark the power-domain-names property as required
- Set maxItems for power-domains to 1 for all existing bindings to
maintain the current requirements after modifying the value in the
top-level document
- Link to v3: https://lore.kernel.org/r/20251027-qcom-sa8255p-emac-v3-0-75767b9230ab@linaro.org
Changes in v3:
- Drop 'power' and 'perf' prefixes from power domain names
- Rebase on top of Russell's changes to dwmac
- Rebase on top of even more changes from Russell that are not yet
in next (E1vB6ld-0000000BIPy-2Qi4@rmk-PC.armlinux.org.uk)
- Link to v2: https://lore.kernel.org/all/20251008-qcom-sa8255p-emac-v2-0-92bc29309fce@linaro.org/
Changes in v2:
- Fix the power-domains property in DT bindings
- Rework the DT bindings example
- Drop the DTS patch, it will go upstream separately
- Link to v1: https://lore.kernel.org/r/20250910-qcom-sa8255p-emac-v1-0-32a79cf1e668@linaro.org
---
Bartosz Golaszewski (7):
dt-bindings: phy: document the serdes PHY on sa8255p
phy: qcom: add the SGMII SerDes PHY driver for SCMI systems
dt-bindings: net: qcom: document the ethqos device for SCMI-based systems
net: stmmac: qcom-ethqos: set serdes mode before powerup
net: stmmac: qcom-ethqos: reuse the address of ethqos_emac_driver_data
net: stmmac: qcom-ethqos: factor out linux-level setup into a separate function
net: stmmac: qcom-ethqos: add support for sa8255p
.../bindings/net/allwinner,sun7i-a20-gmac.yaml | 3 +
.../bindings/net/altr,socfpga-stmmac.yaml | 3 +
.../bindings/net/amlogic,meson-dwmac.yaml | 3 +
.../devicetree/bindings/net/eswin,eic7700-eth.yaml | 3 +
.../devicetree/bindings/net/intel,dwmac-plat.yaml | 3 +
.../bindings/net/loongson,ls1b-gmac.yaml | 3 +
.../bindings/net/loongson,ls1c-emac.yaml | 3 +
.../devicetree/bindings/net/nxp,dwmac-imx.yaml | 3 +
.../devicetree/bindings/net/nxp,lpc1850-dwmac.yaml | 3 +
.../devicetree/bindings/net/nxp,s32-dwmac.yaml | 3 +
.../devicetree/bindings/net/qcom,ethqos.yaml | 3 +
.../bindings/net/qcom,sa8255p-ethqos.yaml | 107 ++++++++++
.../devicetree/bindings/net/renesas,rzn1-gmac.yaml | 3 +
.../bindings/net/renesas,rzv2h-gbeth.yaml | 3 +
.../devicetree/bindings/net/rockchip-dwmac.yaml | 3 +
.../devicetree/bindings/net/snps,dwmac.yaml | 5 +-
.../bindings/net/sophgo,cv1800b-dwmac.yaml | 3 +
.../bindings/net/sophgo,sg2044-dwmac.yaml | 3 +
.../bindings/net/starfive,jh7110-dwmac.yaml | 3 +
.../devicetree/bindings/net/stm32-dwmac.yaml | 3 +
.../devicetree/bindings/net/tesla,fsd-ethqos.yaml | 3 +
.../devicetree/bindings/net/thead,th1520-gmac.yaml | 3 +
.../bindings/net/toshiba,visconti-dwmac.yaml | 3 +
.../bindings/phy/qcom,sa8255p-dwmac-sgmii-phy.yaml | 50 +++++
MAINTAINERS | 1 +
.../ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c | 230 ++++++++++++++++-----
drivers/phy/qualcomm/Kconfig | 11 +
drivers/phy/qualcomm/Makefile | 1 +
drivers/phy/qualcomm/phy-qcom-sgmii-eth-scmi.c | 161 +++++++++++++++
29 files changed, 573 insertions(+), 56 deletions(-)
---
base-commit: ca70e9a43a66435fda3a9d37f90c9c3b7bf211f6
change-id: 20250704-qcom-sa8255p-emac-8460235ac512
Best regards,
--
Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
^ permalink raw reply
* [PATCH net-next v12 1/7] dt-bindings: phy: document the serdes PHY on sa8255p
From: Bartosz Golaszewski @ 2026-07-06 13:20 UTC (permalink / raw)
To: Bjorn Andersson, Konrad Dybcio, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Andrew Lunn, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Maxime Coquelin, Alexandre Torgue,
Vinod Koul, Giuseppe Cavallaro, Chen-Yu Tsai, Jernej Skrabec,
Neil Armstrong, Kevin Hilman, Jerome Brunet, Shawn Guo,
Fabio Estevam, Jan Petrous, s32, Mohd Ayaan Anwar, Romain Gantois,
Geert Uytterhoeven, Magnus Damm, Maxime Ripard,
Christophe Roullier, Bartosz Golaszewski, Radu Rendec
Cc: linux-arm-msm, devicetree, linux-kernel, netdev, linux-stm32,
linux-arm-kernel, Drew Fustini, linux-sunxi, linux-amlogic,
linux-mips, imx, linux-renesas-soc, linux-rockchip, sophgo,
linux-riscv, brgl, Bartosz Golaszewski, Bartosz Golaszewski,
Krzysztof Kozlowski
In-Reply-To: <20260706-qcom-sa8255p-emac-v12-0-e3ab1ecf2901@oss.qualcomm.com>
Describe the SGMII/SerDes PHY present on the Qualcomm sa8255p platforms.
This is essentially the same hardware as sa8775p rev3 but the PHY is
managed by firmware over SCMI.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
.../bindings/phy/qcom,sa8255p-dwmac-sgmii-phy.yaml | 50 ++++++++++++++++++++++
1 file changed, 50 insertions(+)
diff --git a/Documentation/devicetree/bindings/phy/qcom,sa8255p-dwmac-sgmii-phy.yaml b/Documentation/devicetree/bindings/phy/qcom,sa8255p-dwmac-sgmii-phy.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..9e846e381555514bb32177f884abf0cf2c942948
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/qcom,sa8255p-dwmac-sgmii-phy.yaml
@@ -0,0 +1,50 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/qcom,sa8255p-dwmac-sgmii-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm SerDes/SGMII ethernet PHY controller (firmware managed)
+
+maintainers:
+ - Bartosz Golaszewski <brgl@kernel.org>
+
+description:
+ The SerDes PHY sits between the MAC and the external PHY and provides
+ separate Rx Tx lines.
+
+properties:
+ compatible:
+ const: qcom,sa8255p-dwmac-sgmii-phy
+
+ reg:
+ items:
+ - description: serdes
+
+ power-domains:
+ maxItems: 1
+
+ power-domain-names:
+ maxItems: 1
+
+ "#phy-cells":
+ const: 0
+
+required:
+ - compatible
+ - reg
+ - "#phy-cells"
+ - power-domains
+ - power-domain-names
+
+additionalProperties: false
+
+examples:
+ - |
+ phy@8901000 {
+ compatible = "qcom,sa8255p-dwmac-sgmii-phy";
+ reg = <0x08901000 0xe10>;
+ #phy-cells = <0>;
+ power-domains = <&scmi7_dvfs 0>;
+ power-domain-names = "serdes";
+ };
--
2.47.3
^ permalink raw reply related
* [PATCH net-next v12 2/7] phy: qcom: add the SGMII SerDes PHY driver for SCMI systems
From: Bartosz Golaszewski @ 2026-07-06 13:20 UTC (permalink / raw)
To: Bjorn Andersson, Konrad Dybcio, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Andrew Lunn, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Maxime Coquelin, Alexandre Torgue,
Vinod Koul, Giuseppe Cavallaro, Chen-Yu Tsai, Jernej Skrabec,
Neil Armstrong, Kevin Hilman, Jerome Brunet, Shawn Guo,
Fabio Estevam, Jan Petrous, s32, Mohd Ayaan Anwar, Romain Gantois,
Geert Uytterhoeven, Magnus Damm, Maxime Ripard,
Christophe Roullier, Bartosz Golaszewski, Radu Rendec
Cc: linux-arm-msm, devicetree, linux-kernel, netdev, linux-stm32,
linux-arm-kernel, Drew Fustini, linux-sunxi, linux-amlogic,
linux-mips, imx, linux-renesas-soc, linux-rockchip, sophgo,
linux-riscv, brgl, Bartosz Golaszewski, Bartosz Golaszewski
In-Reply-To: <20260706-qcom-sa8255p-emac-v12-0-e3ab1ecf2901@oss.qualcomm.com>
Implement support for the firmware-managed SGMII/SerDes PHY present on
Qualcomm platforms. Do this as a separate driver from the HLOS-managed
variant as they don't share almost any code.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
drivers/phy/qualcomm/Kconfig | 11 ++
drivers/phy/qualcomm/Makefile | 1 +
drivers/phy/qualcomm/phy-qcom-sgmii-eth-scmi.c | 161 +++++++++++++++++++++++++
3 files changed, 173 insertions(+)
diff --git a/drivers/phy/qualcomm/Kconfig b/drivers/phy/qualcomm/Kconfig
index 60a0ead127fa9f08749e1bc686e15cc5eb341c28..a7cf348f6a7aa18e8b3f39f109b02ea672ae4177 100644
--- a/drivers/phy/qualcomm/Kconfig
+++ b/drivers/phy/qualcomm/Kconfig
@@ -232,3 +232,14 @@ config PHY_QCOM_SGMII_ETH
help
Enable this to support the internal SerDes/SGMII PHY on various
Qualcomm chipsets.
+
+config PHY_QCOM_SGMII_ETH_SCMI
+ tristate "Qualcomm DWMAC SGMII SerDes/PHY driver (firmware managed)"
+ depends on OF && (ARCH_QCOM || COMPILE_TEST)
+ select GENERIC_PHY
+ select PM
+ select PM_GENERIC_DOMAINS
+ help
+ Enable this to support the internal SerDes/SGMII PHY on Qualcomm
+ chipsets where the SerDes hardware (clocks and registers) is owned
+ by the firmware.
diff --git a/drivers/phy/qualcomm/Makefile b/drivers/phy/qualcomm/Makefile
index b71a6a0bed3f1489b1d07664ecd728f1db145986..032e582f2e1af96687484ce28aaba0c2ef73e754 100644
--- a/drivers/phy/qualcomm/Makefile
+++ b/drivers/phy/qualcomm/Makefile
@@ -25,3 +25,4 @@ obj-$(CONFIG_PHY_QCOM_USB_SS) += phy-qcom-usb-ss.o
obj-$(CONFIG_PHY_QCOM_USB_SNPS_FEMTO_V2)+= phy-qcom-snps-femto-v2.o
obj-$(CONFIG_PHY_QCOM_IPQ806X_USB) += phy-qcom-ipq806x-usb.o
obj-$(CONFIG_PHY_QCOM_SGMII_ETH) += phy-qcom-sgmii-eth.o
+obj-$(CONFIG_PHY_QCOM_SGMII_ETH_SCMI) += phy-qcom-sgmii-eth-scmi.o
diff --git a/drivers/phy/qualcomm/phy-qcom-sgmii-eth-scmi.c b/drivers/phy/qualcomm/phy-qcom-sgmii-eth-scmi.c
new file mode 100644
index 0000000000000000000000000000000000000000..8ee62189556fe4ff0d8aa2f8b105175e08000b7c
--- /dev/null
+++ b/drivers/phy/qualcomm/phy-qcom-sgmii-eth-scmi.c
@@ -0,0 +1,161 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
+ *
+ * Firmware-managed variant of the Qualcomm DWMAC SGMII SerDes/PHY driver.
+ */
+
+#include <linux/delay.h>
+#include <linux/ethtool.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/phy.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/pm_runtime.h>
+
+struct qcom_dwmac_sgmii_phy_scmi {
+ unsigned int perf_state;
+};
+
+static int qcom_dwmac_sgmii_phy_scmi_power_on(struct phy *phy)
+{
+ struct qcom_dwmac_sgmii_phy_scmi *priv = phy_get_drvdata(phy);
+ struct device *dev = phy->dev.parent;
+ int ret;
+
+ ret = pm_runtime_resume_and_get(dev);
+ if (ret)
+ return ret;
+
+ ret = dev_pm_genpd_set_performance_state(dev, priv->perf_state);
+ if (ret) {
+ pm_runtime_put(dev);
+ return ret;
+ }
+
+ usleep_range(5000, 10000);
+
+ return 0;
+}
+
+static int qcom_dwmac_sgmii_phy_scmi_power_off(struct phy *phy)
+{
+ struct device *dev = phy->dev.parent;
+
+ dev_pm_genpd_set_performance_state(dev, 0);
+ pm_runtime_put(dev);
+
+ return 0;
+}
+
+static int qcom_dwmac_sgmii_phy_scmi_validate(struct phy *phy, enum phy_mode mode,
+ int submode,
+ union phy_configure_opts *opts)
+{
+ if (mode != PHY_MODE_ETHERNET)
+ return -EINVAL;
+
+ switch (submode) {
+ case PHY_INTERFACE_MODE_SGMII:
+ case PHY_INTERFACE_MODE_1000BASEX:
+ case PHY_INTERFACE_MODE_2500BASEX:
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int qcom_dwmac_sgmii_phy_scmi_set_mode(struct phy *phy, enum phy_mode mode,
+ int submode)
+{
+ struct qcom_dwmac_sgmii_phy_scmi *priv = phy_get_drvdata(phy);
+ int ret;
+
+ ret = qcom_dwmac_sgmii_phy_scmi_validate(phy, mode, submode, NULL);
+ if (ret)
+ return ret;
+
+ priv->perf_state = (submode == PHY_INTERFACE_MODE_2500BASEX) ?
+ SPEED_2500 : SPEED_1000;
+
+ return 0;
+}
+
+static const struct phy_ops qcom_dwmac_sgmii_phy_scmi_ops = {
+ .power_on = qcom_dwmac_sgmii_phy_scmi_power_on,
+ .power_off = qcom_dwmac_sgmii_phy_scmi_power_off,
+ .set_mode = qcom_dwmac_sgmii_phy_scmi_set_mode,
+ .validate = qcom_dwmac_sgmii_phy_scmi_validate,
+ .owner = THIS_MODULE,
+};
+
+static void qcom_dwmac_sgmii_phy_scmi_runtime_disable(void *data)
+{
+ struct device *dev = data;
+
+ pm_runtime_disable(dev);
+}
+
+static int qcom_dwmac_sgmii_phy_scmi_probe(struct platform_device *pdev)
+{
+ struct qcom_dwmac_sgmii_phy_scmi *priv;
+ struct device *dev = &pdev->dev;
+ struct phy_provider *provider;
+ struct phy *phy;
+ int ret;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->perf_state = SPEED_1000;
+
+ /*
+ * Enable runtime PM on the provider before creating the PHY so that the
+ * PHY core enables runtime PM on the PHY device too. The single SCMI
+ * power domain has already been attached to this device by the driver
+ * core, so runtime PM votes propagate to firmware through the genpd
+ * device link. No register or clock access is done here - firmware owns
+ * the SerDes.
+ */
+ pm_runtime_enable(dev);
+
+ ret = devm_add_action_or_reset(dev, qcom_dwmac_sgmii_phy_scmi_runtime_disable, dev);
+ if (ret)
+ return ret;
+
+ phy = devm_phy_create(dev, NULL, &qcom_dwmac_sgmii_phy_scmi_ops);
+ if (IS_ERR(phy))
+ return dev_err_probe(dev, PTR_ERR(phy), "failed to create the phy\n");
+
+ phy_set_drvdata(phy, priv);
+
+ provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+ if (IS_ERR(provider))
+ return dev_err_probe(dev, PTR_ERR(provider),
+ "failed to register the PHY provider\n");
+
+ return 0;
+}
+
+static const struct of_device_id qcom_dwmac_sgmii_phy_scmi_of_match[] = {
+ { .compatible = "qcom,sa8255p-dwmac-sgmii-phy" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, qcom_dwmac_sgmii_phy_scmi_of_match);
+
+static struct platform_driver qcom_dwmac_sgmii_phy_scmi_driver = {
+ .probe = qcom_dwmac_sgmii_phy_scmi_probe,
+ .driver = {
+ .name = "qcom-dwmac-sgmii-phy-scmi",
+ .of_match_table = qcom_dwmac_sgmii_phy_scmi_of_match,
+ },
+};
+module_platform_driver(qcom_dwmac_sgmii_phy_scmi_driver);
+
+MODULE_DESCRIPTION("Qualcomm DWMAC SGMII PHY driver (firmware managed)");
+MODULE_AUTHOR("Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>");
+MODULE_LICENSE("GPL");
--
2.47.3
^ permalink raw reply related
* [PATCH net-next v12 3/7] dt-bindings: net: qcom: document the ethqos device for SCMI-based systems
From: Bartosz Golaszewski @ 2026-07-06 13:20 UTC (permalink / raw)
To: Bjorn Andersson, Konrad Dybcio, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Andrew Lunn, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Maxime Coquelin, Alexandre Torgue,
Vinod Koul, Giuseppe Cavallaro, Chen-Yu Tsai, Jernej Skrabec,
Neil Armstrong, Kevin Hilman, Jerome Brunet, Shawn Guo,
Fabio Estevam, Jan Petrous, s32, Mohd Ayaan Anwar, Romain Gantois,
Geert Uytterhoeven, Magnus Damm, Maxime Ripard,
Christophe Roullier, Bartosz Golaszewski, Radu Rendec
Cc: linux-arm-msm, devicetree, linux-kernel, netdev, linux-stm32,
linux-arm-kernel, Drew Fustini, linux-sunxi, linux-amlogic,
linux-mips, imx, linux-renesas-soc, linux-rockchip, sophgo,
linux-riscv, brgl, Bartosz Golaszewski, Bartosz Golaszewski,
Martin Blumenstingl, Krzysztof Kozlowski, Lad Prabhakar
In-Reply-To: <20260706-qcom-sa8255p-emac-v12-0-e3ab1ecf2901@oss.qualcomm.com>
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Describe the firmware-managed variant of the QCom DesignWare MAC. As the
properties here differ a lot from the HLOS-managed variant, lets put it
in a separate file. Since we need to update the maximum number of power
domains, let's update existing bindings referencing the top-level
snps,dwmac.yaml and limit their maxItems for power-domains to 1.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Romain Gantois <romain.gantois@bootlin.com> # For RZ/N1
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
.../bindings/net/allwinner,sun7i-a20-gmac.yaml | 3 +
.../bindings/net/altr,socfpga-stmmac.yaml | 3 +
.../bindings/net/amlogic,meson-dwmac.yaml | 3 +
.../devicetree/bindings/net/eswin,eic7700-eth.yaml | 3 +
.../devicetree/bindings/net/intel,dwmac-plat.yaml | 3 +
.../bindings/net/loongson,ls1b-gmac.yaml | 3 +
.../bindings/net/loongson,ls1c-emac.yaml | 3 +
.../devicetree/bindings/net/nxp,dwmac-imx.yaml | 3 +
.../devicetree/bindings/net/nxp,lpc1850-dwmac.yaml | 3 +
.../devicetree/bindings/net/nxp,s32-dwmac.yaml | 3 +
.../devicetree/bindings/net/qcom,ethqos.yaml | 3 +
.../bindings/net/qcom,sa8255p-ethqos.yaml | 107 +++++++++++++++++++++
.../devicetree/bindings/net/renesas,rzn1-gmac.yaml | 3 +
.../bindings/net/renesas,rzv2h-gbeth.yaml | 3 +
.../devicetree/bindings/net/rockchip-dwmac.yaml | 3 +
.../devicetree/bindings/net/snps,dwmac.yaml | 5 +-
.../bindings/net/sophgo,cv1800b-dwmac.yaml | 3 +
.../bindings/net/sophgo,sg2044-dwmac.yaml | 3 +
.../bindings/net/starfive,jh7110-dwmac.yaml | 3 +
.../devicetree/bindings/net/stm32-dwmac.yaml | 3 +
.../devicetree/bindings/net/tesla,fsd-ethqos.yaml | 3 +
.../devicetree/bindings/net/thead,th1520-gmac.yaml | 3 +
.../bindings/net/toshiba,visconti-dwmac.yaml | 3 +
MAINTAINERS | 1 +
24 files changed, 175 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/net/allwinner,sun7i-a20-gmac.yaml b/Documentation/devicetree/bindings/net/allwinner,sun7i-a20-gmac.yaml
index 23e92be33ac8609a16db530782989caed22a5730..b12632545673b2ad0148a677f45a7447309a43cd 100644
--- a/Documentation/devicetree/bindings/net/allwinner,sun7i-a20-gmac.yaml
+++ b/Documentation/devicetree/bindings/net/allwinner,sun7i-a20-gmac.yaml
@@ -40,6 +40,9 @@ properties:
description:
PHY regulator
+ power-domains:
+ maxItems: 1
+
required:
- compatible
- reg
diff --git a/Documentation/devicetree/bindings/net/altr,socfpga-stmmac.yaml b/Documentation/devicetree/bindings/net/altr,socfpga-stmmac.yaml
index fc445ad5a1f1ac490e921696d6f7ca83d15de459..448e617cddc4cda8dbc77e83324495ffd5dfb9be 100644
--- a/Documentation/devicetree/bindings/net/altr,socfpga-stmmac.yaml
+++ b/Documentation/devicetree/bindings/net/altr,socfpga-stmmac.yaml
@@ -140,6 +140,9 @@ properties:
- description: offset of the control register
- description: shift within the control register
+ power-domains:
+ maxItems: 1
+
patternProperties:
"^mdio[0-9]$":
type: object
diff --git a/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml b/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml
index 5c91716d1f21e617543b03c5a90b993f8aee053c..9c9cc3ef384da0270489c21b3426572ea46d9499 100644
--- a/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml
@@ -158,6 +158,9 @@ properties:
interrupt-names:
const: macirq
+ power-domains:
+ maxItems: 1
+
required:
- compatible
- reg
diff --git a/Documentation/devicetree/bindings/net/eswin,eic7700-eth.yaml b/Documentation/devicetree/bindings/net/eswin,eic7700-eth.yaml
index 65882ff79d8d7e3227e31415676639dd86f7098f..081a21174fd42bc4925d1850b1147545e111363c 100644
--- a/Documentation/devicetree/bindings/net/eswin,eic7700-eth.yaml
+++ b/Documentation/devicetree/bindings/net/eswin,eic7700-eth.yaml
@@ -95,6 +95,9 @@ properties:
- description: Optional offset of register controlling TXD delay
- description: Optional offset of register controlling RXD delay
+ power-domains:
+ maxItems: 1
+
required:
- compatible
- reg
diff --git a/Documentation/devicetree/bindings/net/intel,dwmac-plat.yaml b/Documentation/devicetree/bindings/net/intel,dwmac-plat.yaml
index 62c1da36a2b5a29290e5e01be87c48158c4adf89..e41851931b947559c89b0cd6f4756f71046f9594 100644
--- a/Documentation/devicetree/bindings/net/intel,dwmac-plat.yaml
+++ b/Documentation/devicetree/bindings/net/intel,dwmac-plat.yaml
@@ -47,6 +47,9 @@ properties:
interrupt-names:
const: macirq
+ power-domains:
+ maxItems: 1
+
required:
- compatible
- clocks
diff --git a/Documentation/devicetree/bindings/net/loongson,ls1b-gmac.yaml b/Documentation/devicetree/bindings/net/loongson,ls1b-gmac.yaml
index c4f3224bad387b87a5b4a3049dabd75f2c4bd42f..c9a131b8d8304c41559a416b324df749c0a87d14 100644
--- a/Documentation/devicetree/bindings/net/loongson,ls1b-gmac.yaml
+++ b/Documentation/devicetree/bindings/net/loongson,ls1b-gmac.yaml
@@ -66,6 +66,9 @@ properties:
- mii
- rgmii-id
+ power-domains:
+ maxItems: 1
+
required:
- compatible
- reg
diff --git a/Documentation/devicetree/bindings/net/loongson,ls1c-emac.yaml b/Documentation/devicetree/bindings/net/loongson,ls1c-emac.yaml
index 99001b940b8361f69bb917617f857ee99f4b3fa5..49db18423dd807683b9bb297978f5da8ea6cee3d 100644
--- a/Documentation/devicetree/bindings/net/loongson,ls1c-emac.yaml
+++ b/Documentation/devicetree/bindings/net/loongson,ls1c-emac.yaml
@@ -65,6 +65,9 @@ properties:
- mii
- rmii
+ power-domains:
+ maxItems: 1
+
required:
- compatible
- reg
diff --git a/Documentation/devicetree/bindings/net/nxp,dwmac-imx.yaml b/Documentation/devicetree/bindings/net/nxp,dwmac-imx.yaml
index e5db346beca9649be4f97727b78fda8973095912..b240c76e7dd5254d0c3752610c4aa848a3c3d65b 100644
--- a/Documentation/devicetree/bindings/net/nxp,dwmac-imx.yaml
+++ b/Documentation/devicetree/bindings/net/nxp,dwmac-imx.yaml
@@ -83,6 +83,9 @@ properties:
description:
To select RMII reference clock from external.
+ power-domains:
+ maxItems: 1
+
required:
- compatible
- clocks
diff --git a/Documentation/devicetree/bindings/net/nxp,lpc1850-dwmac.yaml b/Documentation/devicetree/bindings/net/nxp,lpc1850-dwmac.yaml
index 05acd9bc7616356e68090ebdd4df20e42f70dd7e..f61188ab0dbe3c0cec5b10f7a65dfaff4dc3898f 100644
--- a/Documentation/devicetree/bindings/net/nxp,lpc1850-dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/nxp,lpc1850-dwmac.yaml
@@ -51,6 +51,9 @@ properties:
items:
- const: stmmaceth
+ power-domains:
+ maxItems: 1
+
required:
- compatible
- reg
diff --git a/Documentation/devicetree/bindings/net/nxp,s32-dwmac.yaml b/Documentation/devicetree/bindings/net/nxp,s32-dwmac.yaml
index 753a04941659b82b655dad1439ff66f8b37fa18b..fcad2274302d9cff36760184b74918a9835906f7 100644
--- a/Documentation/devicetree/bindings/net/nxp,s32-dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/nxp,s32-dwmac.yaml
@@ -81,6 +81,9 @@ properties:
- const: rx
- const: ptp_ref
+ power-domains:
+ maxItems: 1
+
required:
- clocks
- clock-names
diff --git a/Documentation/devicetree/bindings/net/qcom,ethqos.yaml b/Documentation/devicetree/bindings/net/qcom,ethqos.yaml
index 423959cb928d945aa3e758a3c803d12bd61ec42b..ef520f8105773e22c0536ff419dad55fe316e1bd 100644
--- a/Documentation/devicetree/bindings/net/qcom,ethqos.yaml
+++ b/Documentation/devicetree/bindings/net/qcom,ethqos.yaml
@@ -86,6 +86,9 @@ properties:
phy-names:
const: serdes
+ power-domains:
+ maxItems: 1
+
required:
- compatible
- clocks
diff --git a/Documentation/devicetree/bindings/net/qcom,sa8255p-ethqos.yaml b/Documentation/devicetree/bindings/net/qcom,sa8255p-ethqos.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..5158481e5e5b0feed5b3dcd2cda2f593b7ff62e4
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/qcom,sa8255p-ethqos.yaml
@@ -0,0 +1,107 @@
+# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/qcom,sa8255p-ethqos.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Ethernet ETHQOS device (firmware managed)
+
+maintainers:
+ - Bjorn Andersson <andersson@kernel.org>
+ - Konrad Dybcio <konradybcio@kernel.org>
+ - Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
+
+description:
+ dwmac based Qualcomm ethernet devices which support Gigabit
+ ethernet (version v2.3.0 and onwards) with clocks, interconnects, etc.
+ managed by firmware
+
+allOf:
+ - $ref: snps,dwmac.yaml#
+
+properties:
+ compatible:
+ const: qcom,sa8255p-ethqos
+
+ reg:
+ maxItems: 2
+
+ reg-names:
+ items:
+ - const: stmmaceth
+ - const: rgmii
+
+ interrupts:
+ items:
+ - description: Combined signal for various interrupt events
+ - description: The interrupt that occurs when HW safety error triggered
+
+ interrupt-names:
+ items:
+ - const: macirq
+ - const: sfty
+
+ power-domains:
+ minItems: 2
+ maxItems: 2
+
+ power-domain-names:
+ items:
+ - const: core
+ - const: mdio
+
+ phys:
+ maxItems: 1
+
+ phy-names:
+ items:
+ - const: serdes
+
+ iommus:
+ maxItems: 1
+
+ dma-coherent: true
+
+required:
+ - compatible
+ - reg-names
+ - power-domains
+ - power-domain-names
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ ethernet: ethernet@23040000 {
+ compatible = "qcom,sa8255p-ethqos";
+ reg = <0x23040000 0x10000>,
+ <0x23056000 0x100>;
+ reg-names = "stmmaceth", "rgmii";
+
+ iommus = <&apps_smmu 0x120 0x7>;
+
+ interrupts = <GIC_SPI 946 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 782 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "macirq", "sfty";
+
+ dma-coherent;
+
+ snps,tso;
+ snps,pbl = <32>;
+ rx-fifo-depth = <16384>;
+ tx-fifo-depth = <16384>;
+
+ phy-handle = <ðernet_phy>;
+ phy-mode = "2500base-x";
+
+ snps,mtl-rx-config = <&mtl_rx_setup1>;
+ snps,mtl-tx-config = <&mtl_tx_setup1>;
+
+ power-domains = <&scmi8_pd 0>, <&scmi8_pd 1>;
+ power-domain-names = "core", "mdio";
+
+ phys = <&serdes1>;
+ phy-names = "serdes";
+ };
diff --git a/Documentation/devicetree/bindings/net/renesas,rzn1-gmac.yaml b/Documentation/devicetree/bindings/net/renesas,rzn1-gmac.yaml
index 16dd7a2631abf6fb7dc8e0c90755ab1e81915b38..ed0d10a19ca4c47c05f6873c64b0537b90acd15a 100644
--- a/Documentation/devicetree/bindings/net/renesas,rzn1-gmac.yaml
+++ b/Documentation/devicetree/bindings/net/renesas,rzn1-gmac.yaml
@@ -44,6 +44,9 @@ properties:
phandle pointing to a PCS sub-node compatible with
renesas,rzn1-miic.yaml#
+ power-domains:
+ maxItems: 1
+
required:
- compatible
diff --git a/Documentation/devicetree/bindings/net/renesas,rzv2h-gbeth.yaml b/Documentation/devicetree/bindings/net/renesas,rzv2h-gbeth.yaml
index 2125b5ddf73dadd8b0d372e83a6b5c4624f5e648..8338834f49cd21df6c697a1f52a8b195c0208c23 100644
--- a/Documentation/devicetree/bindings/net/renesas,rzv2h-gbeth.yaml
+++ b/Documentation/devicetree/bindings/net/renesas,rzv2h-gbeth.yaml
@@ -154,6 +154,9 @@ properties:
Documentation/devicetree/bindings/net/pcs/renesas,rzn1-miic.yaml#
(Refer RZ/T2H portion in the DT-binding file)
+ power-domains:
+ maxItems: 1
+
required:
- compatible
- reg
diff --git a/Documentation/devicetree/bindings/net/rockchip-dwmac.yaml b/Documentation/devicetree/bindings/net/rockchip-dwmac.yaml
index 80c252845349c4533deff85b052157984d0e2f23..3ec3f6dc2a125908ba98f20b1120311de8967954 100644
--- a/Documentation/devicetree/bindings/net/rockchip-dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/rockchip-dwmac.yaml
@@ -123,6 +123,9 @@ properties:
phy-supply:
description: PHY regulator
+ power-domains:
+ maxItems: 1
+
required:
- compatible
- clocks
diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
index 2449311c6d28ed3fbf8c92526ce8b872900653f4..d3aff1df3070d1b22198766ee2e0131dcf925287 100644
--- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
@@ -72,6 +72,7 @@ properties:
- nuvoton,ma35d1-dwmac
- nxp,s32g2-dwmac
- qcom,qcs404-ethqos
+ - qcom,sa8255p-ethqos
- qcom,sa8775p-ethqos
- qcom,sc8280xp-ethqos
- qcom,sm8150-ethqos
@@ -185,7 +186,8 @@ properties:
- const: ahb
power-domains:
- maxItems: 1
+ minItems: 1
+ maxItems: 2
mac-mode:
$ref: ethernet-controller.yaml#/properties/phy-connection-type
@@ -630,6 +632,7 @@ allOf:
- ingenic,x1830-mac
- ingenic,x2000-mac
- qcom,qcs404-ethqos
+ - qcom,sa8255p-ethqos
- qcom,sa8775p-ethqos
- qcom,sc8280xp-ethqos
- qcom,sm8150-ethqos
diff --git a/Documentation/devicetree/bindings/net/sophgo,cv1800b-dwmac.yaml b/Documentation/devicetree/bindings/net/sophgo,cv1800b-dwmac.yaml
index b89456f0ef830991135bd17626da98661429596c..e78cbf594c695204040a53ab1e367daa9e12246b 100644
--- a/Documentation/devicetree/bindings/net/sophgo,cv1800b-dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/sophgo,cv1800b-dwmac.yaml
@@ -49,6 +49,9 @@ properties:
reset-names:
const: stmmaceth
+ power-domains:
+ maxItems: 1
+
required:
- compatible
- reg
diff --git a/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml b/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
index e8d3814db0e94fdcd0f3ab2a9fa8bab972a97ab5..845e2c67d20037496bb1eec6eb73c99cde74e944 100644
--- a/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
@@ -52,6 +52,9 @@ properties:
interrupt-names:
maxItems: 1
+ power-domains:
+ maxItems: 1
+
resets:
maxItems: 1
diff --git a/Documentation/devicetree/bindings/net/starfive,jh7110-dwmac.yaml b/Documentation/devicetree/bindings/net/starfive,jh7110-dwmac.yaml
index fdcc61c65f87d1dc15a17b9486cde032ffa7798b..c424e77973921e1f9f18135c3106f1c270c9ac87 100644
--- a/Documentation/devicetree/bindings/net/starfive,jh7110-dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/starfive,jh7110-dwmac.yaml
@@ -75,6 +75,9 @@ properties:
The argument one is the offset of phy mode selection, the
argument two is the shift of phy mode selection.
+ power-domains:
+ maxItems: 1
+
required:
- compatible
- reg
diff --git a/Documentation/devicetree/bindings/net/stm32-dwmac.yaml b/Documentation/devicetree/bindings/net/stm32-dwmac.yaml
index 987254900d0da7aab81237f20b1540ad8a17bd21..29b878079ff0c1a0ef95fc63f2035f478ee039b2 100644
--- a/Documentation/devicetree/bindings/net/stm32-dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/stm32-dwmac.yaml
@@ -121,6 +121,9 @@ properties:
minItems: 1
maxItems: 2
+ power-domains:
+ maxItems: 1
+
required:
- compatible
- clocks
diff --git a/Documentation/devicetree/bindings/net/tesla,fsd-ethqos.yaml b/Documentation/devicetree/bindings/net/tesla,fsd-ethqos.yaml
index dd7481bb16e59982c26c1a54ae82b8cff85fdfe0..ad635529d676ed6b752ab3bde5152d5cbddcb519 100644
--- a/Documentation/devicetree/bindings/net/tesla,fsd-ethqos.yaml
+++ b/Documentation/devicetree/bindings/net/tesla,fsd-ethqos.yaml
@@ -67,6 +67,9 @@ properties:
- rgmii-rxid
- rgmii-txid
+ power-domains:
+ maxItems: 1
+
required:
- compatible
- reg
diff --git a/Documentation/devicetree/bindings/net/thead,th1520-gmac.yaml b/Documentation/devicetree/bindings/net/thead,th1520-gmac.yaml
index b3492a9aa4effa73fadf92a63a76ba8bb65a8769..c859f8bb5d582af8b8782f2f89ab5e6ee3d7a46c 100644
--- a/Documentation/devicetree/bindings/net/thead,th1520-gmac.yaml
+++ b/Documentation/devicetree/bindings/net/thead,th1520-gmac.yaml
@@ -78,6 +78,9 @@ properties:
items:
- const: macirq
+ power-domains:
+ maxItems: 1
+
required:
- clocks
- clock-names
diff --git a/Documentation/devicetree/bindings/net/toshiba,visconti-dwmac.yaml b/Documentation/devicetree/bindings/net/toshiba,visconti-dwmac.yaml
index f0f32e18fc8550e6f63b87b60a095972453836c9..efa39eab0256a1102b01872bd848749788c9b4e8 100644
--- a/Documentation/devicetree/bindings/net/toshiba,visconti-dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/toshiba,visconti-dwmac.yaml
@@ -48,6 +48,9 @@ properties:
interrupt-names:
const: macirq
+ power-domains:
+ maxItems: 1
+
required:
- compatible
- reg
diff --git a/MAINTAINERS b/MAINTAINERS
index 4a8b0fd665ce2447c3e89784b142d998f7384b95..7d5877528df099d546929bc145ee9e7233391105 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -22184,6 +22184,7 @@ L: netdev@vger.kernel.org
L: linux-arm-msm@vger.kernel.org
S: Maintained
F: Documentation/devicetree/bindings/net/qcom,ethqos.yaml
+F: Documentation/devicetree/bindings/net/qcom,sa8255p-ethqos.yaml
F: drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
QUALCOMM FASTRPC DRIVER
--
2.47.3
^ permalink raw reply related
* [PATCH net-next v12 4/7] net: stmmac: qcom-ethqos: set serdes mode before powerup
From: Bartosz Golaszewski @ 2026-07-06 13:20 UTC (permalink / raw)
To: Bjorn Andersson, Konrad Dybcio, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Andrew Lunn, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Maxime Coquelin, Alexandre Torgue,
Vinod Koul, Giuseppe Cavallaro, Chen-Yu Tsai, Jernej Skrabec,
Neil Armstrong, Kevin Hilman, Jerome Brunet, Shawn Guo,
Fabio Estevam, Jan Petrous, s32, Mohd Ayaan Anwar, Romain Gantois,
Geert Uytterhoeven, Magnus Damm, Maxime Ripard,
Christophe Roullier, Bartosz Golaszewski, Radu Rendec
Cc: linux-arm-msm, devicetree, linux-kernel, netdev, linux-stm32,
linux-arm-kernel, Drew Fustini, linux-sunxi, linux-amlogic,
linux-mips, imx, linux-renesas-soc, linux-rockchip, sophgo,
linux-riscv, brgl, Bartosz Golaszewski, Bartosz Golaszewski
In-Reply-To: <20260706-qcom-sa8255p-emac-v12-0-e3ab1ecf2901@oss.qualcomm.com>
Call phy_set_mode_ext() before phy_power_on() in
qcom_ethqos_serdes_powerup(). This is harmless for existing users but on
SCMI systems this is required for the PHY driver to select the right
performance level - which translates to the link speed. This is done
ahead of adding support for the firmware-managed EMAC on Qualcomm sa8255p.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
index ac7d6d3e205a1ab5b391def879d6f1033a0961b6..47b70b5e706f221c01f1c0ae3b1acafae6641165 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
@@ -601,10 +601,19 @@ static int qcom_ethqos_serdes_powerup(struct net_device *ndev, void *priv)
if (ret)
return ret;
+ ret = phy_set_mode_ext(ethqos->serdes_phy, PHY_MODE_ETHERNET,
+ ethqos->phy_mode);
+ if (ret)
+ goto err_out;
+
ret = phy_power_on(ethqos->serdes_phy);
if (ret)
- phy_exit(ethqos->serdes_phy);
+ goto err_out;
+ return 0;
+
+err_out:
+ phy_exit(ethqos->serdes_phy);
return ret;
}
--
2.47.3
^ permalink raw reply related
* [PATCH net-next v12 5/7] net: stmmac: qcom-ethqos: reuse the address of ethqos_emac_driver_data
From: Bartosz Golaszewski @ 2026-07-06 13:20 UTC (permalink / raw)
To: Bjorn Andersson, Konrad Dybcio, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Andrew Lunn, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Maxime Coquelin, Alexandre Torgue,
Vinod Koul, Giuseppe Cavallaro, Chen-Yu Tsai, Jernej Skrabec,
Neil Armstrong, Kevin Hilman, Jerome Brunet, Shawn Guo,
Fabio Estevam, Jan Petrous, s32, Mohd Ayaan Anwar, Romain Gantois,
Geert Uytterhoeven, Magnus Damm, Maxime Ripard,
Christophe Roullier, Bartosz Golaszewski, Radu Rendec
Cc: linux-arm-msm, devicetree, linux-kernel, netdev, linux-stm32,
linux-arm-kernel, Drew Fustini, linux-sunxi, linux-amlogic,
linux-mips, imx, linux-renesas-soc, linux-rockchip, sophgo,
linux-riscv, brgl, Bartosz Golaszewski, Bartosz Golaszewski
In-Reply-To: <20260706-qcom-sa8255p-emac-v12-0-e3ab1ecf2901@oss.qualcomm.com>
Instead of needlessly copying the fields of ethqos_emac_driver_data into
struct qcom_ethqos, just use the address of the former as a reference.
It's .rodata after all. This is done in order to avoid having either two
calls to of_device_get_match_data() or having to extend the latter with
another field when adding support for SCMI.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
.../ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c | 37 ++++++++--------------
1 file changed, 14 insertions(+), 23 deletions(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
index 47b70b5e706f221c01f1c0ae3b1acafae6641165..fa3447b90315672d706d5ce7d710bdec6214e4e6 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
@@ -103,12 +103,7 @@ struct qcom_ethqos {
struct clk *link_clk;
struct phy *serdes_phy;
phy_interface_t phy_mode;
-
- const struct ethqos_emac_por *rgmii_por;
- unsigned int num_rgmii_por;
- bool rgmii_config_loopback_en;
- bool has_emac_ge_3;
- bool needs_sgmii_loopback;
+ const struct ethqos_emac_driver_data *data;
};
static u32 rgmii_readl(struct qcom_ethqos *ethqos, unsigned int offset)
@@ -189,7 +184,7 @@ static int ethqos_set_clk_tx_rate(void *bsp_priv, struct clk *clk_tx_i,
static void
qcom_ethqos_set_sgmii_loopback(struct qcom_ethqos *ethqos, bool enable)
{
- if (!ethqos->needs_sgmii_loopback ||
+ if (!ethqos->data->needs_sgmii_loopback ||
ethqos->phy_mode != PHY_INTERFACE_MODE_2500BASEX)
return;
@@ -322,7 +317,7 @@ static int ethqos_dll_configure(struct qcom_ethqos *ethqos)
/* Set DLL_EN */
rgmii_setmask(ethqos, SDCC_DLL_CONFIG_DLL_EN, SDCC_HC_REG_DLL_CONFIG);
- if (!ethqos->has_emac_ge_3) {
+ if (!ethqos->data->has_emac_ge_3) {
rgmii_clrmask(ethqos, SDCC_DLL_MCLK_GATING_EN,
SDCC_HC_REG_DLL_CONFIG);
@@ -352,7 +347,7 @@ static int ethqos_dll_configure(struct qcom_ethqos *ethqos)
rgmii_setmask(ethqos, SDCC_DLL_CONFIG2_DDR_CAL_EN,
SDCC_HC_REG_DLL_CONFIG2);
- if (!ethqos->has_emac_ge_3) {
+ if (!ethqos->data->has_emac_ge_3) {
rgmii_clrmask(ethqos, SDCC_DLL_CONFIG2_DLL_CLOCK_DIS,
SDCC_HC_REG_DLL_CONFIG2);
@@ -432,7 +427,7 @@ static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos, int speed)
rgmii_clrmask(ethqos, RGMII_CONFIG2_RSVD_CONFIG15,
RGMII_IO_MACRO_CONFIG2);
- if (speed == SPEED_1000 || ethqos->has_emac_ge_3)
+ if (speed == SPEED_1000 || ethqos->data->has_emac_ge_3)
rgmii_setmask(ethqos, RGMII_CONFIG2_RX_PROG_SWAP,
RGMII_IO_MACRO_CONFIG2);
else
@@ -456,7 +451,7 @@ static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos, int speed)
* in practice this becomes PRG_RCLK_DLY = 52 * 4 /
* (2 * RX delay ns)
*/
- if (ethqos->has_emac_ge_3) {
+ if (ethqos->data->has_emac_ge_3) {
/* 0.9 ns */
prg_rclk_dly = 115;
} else {
@@ -472,7 +467,7 @@ static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos, int speed)
SDCC_HC_REG_DDR_CONFIG);
}
- if (ethqos->rgmii_config_loopback_en)
+ if (ethqos->data->rgmii_config_loopback_en)
loopback = RGMII_CONFIG_LOOPBACK_EN;
else
loopback = 0;
@@ -495,9 +490,9 @@ static void ethqos_fix_mac_speed_rgmii(void *bsp_priv,
dev = ðqos->pdev->dev;
/* Reset to POR values and enable clk */
- for (i = 0; i < ethqos->num_rgmii_por; i++)
- rgmii_writel(ethqos, ethqos->rgmii_por[i].value,
- ethqos->rgmii_por[i].offset);
+ for (i = 0; i < ethqos->data->num_rgmii_por; i++)
+ rgmii_writel(ethqos, ethqos->data->rgmii_por[i].value,
+ ethqos->data->rgmii_por[i].offset);
ethqos_set_func_clk_en(ethqos);
@@ -511,7 +506,7 @@ static void ethqos_fix_mac_speed_rgmii(void *bsp_priv,
rgmii_setmask(ethqos, SDCC_DLL_CONFIG_PDN,
SDCC_HC_REG_DLL_CONFIG);
- if (ethqos->has_emac_ge_3) {
+ if (ethqos->data->has_emac_ge_3) {
if (speed == SPEED_1000) {
rgmii_writel(ethqos, 0x1800000, SDCC_TEST_CTL);
rgmii_writel(ethqos, 0x2C010800, SDCC_USR_CTL);
@@ -538,7 +533,7 @@ static void ethqos_fix_mac_speed_rgmii(void *bsp_priv,
SDCC_HC_REG_DLL_CONFIG);
/* Set USR_CTL bit 26 with mask of 3 bits */
- if (!ethqos->has_emac_ge_3)
+ if (!ethqos->data->has_emac_ge_3)
rgmii_updatel(ethqos, GENMASK(26, 24), BIT(26),
SDCC_USR_CTL);
@@ -743,11 +738,7 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
"Failed to map rgmii resource\n");
data = of_device_get_match_data(dev);
- ethqos->rgmii_por = data->rgmii_por;
- ethqos->num_rgmii_por = data->num_rgmii_por;
- ethqos->rgmii_config_loopback_en = data->rgmii_config_loopback_en;
- ethqos->has_emac_ge_3 = data->has_emac_ge_3;
- ethqos->needs_sgmii_loopback = data->needs_sgmii_loopback;
+ ethqos->data = data;
ethqos->link_clk = devm_clk_get(dev, data->link_clk_name ?: "rgmii");
if (IS_ERR(ethqos->link_clk))
@@ -784,7 +775,7 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
plat_dat->dump_debug_regs = rgmii_dump;
plat_dat->ptp_clk_freq_config = ethqos_ptp_clk_freq_config;
plat_dat->core_type = DWMAC_CORE_GMAC4;
- if (ethqos->has_emac_ge_3)
+ if (data->has_emac_ge_3)
plat_dat->dwmac4_addrs = &data->dwmac4_addrs;
plat_dat->pmt = true;
if (of_property_read_bool(np, "snps,tso"))
--
2.47.3
^ permalink raw reply related
* [PATCH net-next v12 6/7] net: stmmac: qcom-ethqos: factor out linux-level setup into a separate function
From: Bartosz Golaszewski @ 2026-07-06 13:20 UTC (permalink / raw)
To: Bjorn Andersson, Konrad Dybcio, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Andrew Lunn, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Maxime Coquelin, Alexandre Torgue,
Vinod Koul, Giuseppe Cavallaro, Chen-Yu Tsai, Jernej Skrabec,
Neil Armstrong, Kevin Hilman, Jerome Brunet, Shawn Guo,
Fabio Estevam, Jan Petrous, s32, Mohd Ayaan Anwar, Romain Gantois,
Geert Uytterhoeven, Magnus Damm, Maxime Ripard,
Christophe Roullier, Bartosz Golaszewski, Radu Rendec
Cc: linux-arm-msm, devicetree, linux-kernel, netdev, linux-stm32,
linux-arm-kernel, Drew Fustini, linux-sunxi, linux-amlogic,
linux-mips, imx, linux-renesas-soc, linux-rockchip, sophgo,
linux-riscv, brgl, Bartosz Golaszewski, Bartosz Golaszewski
In-Reply-To: <20260706-qcom-sa8255p-emac-v12-0-e3ab1ecf2901@oss.qualcomm.com>
Ahead of adding support for firmware-controlled EMAC variants, extend
the ethqos_emac_driver_data structure with a setup() callback, implement
it for the existing models and move all operations not required in SCMI
mode into it.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
.../ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c | 99 +++++++++++++++-------
1 file changed, 68 insertions(+), 31 deletions(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
index fa3447b90315672d706d5ce7d710bdec6214e4e6..f379570f80680e96f027873cda6a6bca398e22dc 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
@@ -5,6 +5,7 @@
#include <linux/of.h>
#include <linux/of_net.h>
#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
#include <linux/phy.h>
#include <linux/phy/phy.h>
@@ -81,6 +82,8 @@
#define SGMII_10M_RX_CLK_DVDR 0x31
+struct qcom_ethqos;
+
struct ethqos_emac_por {
unsigned int offset;
unsigned int value;
@@ -95,6 +98,8 @@ struct ethqos_emac_driver_data {
const char *link_clk_name;
struct dwmac4_addrs dwmac4_addrs;
bool needs_sgmii_loopback;
+ int (*setup)(struct qcom_ethqos *ethqos,
+ struct plat_stmmacenet_data *plat_dat);
};
struct qcom_ethqos {
@@ -199,6 +204,9 @@ static void ethqos_set_func_clk_en(struct qcom_ethqos *ethqos)
rgmii_setmask(ethqos, RGMII_CONFIG_FUNC_CLK_EN, RGMII_IO_MACRO_CONFIG);
}
+static int ethqos_hlos_setup(struct qcom_ethqos *ethqos,
+ struct plat_stmmacenet_data *plat_dat);
+
static const struct ethqos_emac_por emac_v2_3_0_por[] = {
{ .offset = RGMII_IO_MACRO_CONFIG, .value = 0x00C01343 },
{ .offset = SDCC_HC_REG_DLL_CONFIG, .value = 0x2004642C },
@@ -213,6 +221,7 @@ static const struct ethqos_emac_driver_data emac_v2_3_0_data = {
.num_rgmii_por = ARRAY_SIZE(emac_v2_3_0_por),
.rgmii_config_loopback_en = true,
.has_emac_ge_3 = false,
+ .setup = ethqos_hlos_setup,
};
static const struct ethqos_emac_por emac_v2_1_0_por[] = {
@@ -229,6 +238,7 @@ static const struct ethqos_emac_driver_data emac_v2_1_0_data = {
.num_rgmii_por = ARRAY_SIZE(emac_v2_1_0_por),
.rgmii_config_loopback_en = false,
.has_emac_ge_3 = false,
+ .setup = ethqos_hlos_setup,
};
static const struct ethqos_emac_por emac_v3_0_0_por[] = {
@@ -261,6 +271,7 @@ static const struct ethqos_emac_driver_data emac_v3_0_0_data = {
.mtl_low_cred = 0x00008024,
.mtl_low_cred_offset = 0x1000,
},
+ .setup = ethqos_hlos_setup,
};
static const struct ethqos_emac_por emac_v4_0_0_por[] = {
@@ -296,6 +307,7 @@ static const struct ethqos_emac_driver_data emac_v4_0_0_data = {
.mtl_low_cred = 0x00008024,
.mtl_low_cred_offset = 0x1000,
},
+ .setup = ethqos_hlos_setup,
};
static int ethqos_dll_configure(struct qcom_ethqos *ethqos)
@@ -685,6 +697,58 @@ static void ethqos_ptp_clk_freq_config(struct stmmac_priv *priv)
netdev_dbg(priv->dev, "PTP rate %lu\n", plat_dat->clk_ptp_rate);
}
+static int ethqos_hlos_setup(struct qcom_ethqos *ethqos,
+ struct plat_stmmacenet_data *plat_dat)
+{
+ struct platform_device *pdev = ethqos->pdev;
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ ethqos->rgmii_base = devm_platform_ioremap_resource_byname(pdev, "rgmii");
+ if (IS_ERR(ethqos->rgmii_base))
+ return dev_err_probe(dev, PTR_ERR(ethqos->rgmii_base),
+ "Failed to map rgmii resource\n");
+
+ ethqos->link_clk = devm_clk_get(dev, ethqos->data->link_clk_name ?: "rgmii");
+ if (IS_ERR(ethqos->link_clk))
+ return dev_err_probe(dev, PTR_ERR(ethqos->link_clk),
+ "Failed to get link_clk\n");
+
+ plat_dat->clks_config = ethqos_clks_config;
+
+ ret = ethqos_clks_config(ethqos, true);
+ if (ret)
+ return ret;
+
+ ret = devm_add_action_or_reset(dev, ethqos_clks_disable, ethqos);
+ if (ret)
+ return ret;
+
+ ethqos_set_clk_tx_rate(ethqos, NULL, plat_dat->phy_interface, SPEED_1000);
+ qcom_ethqos_set_sgmii_loopback(ethqos, true);
+ ethqos_set_func_clk_en(ethqos);
+
+ switch (ethqos->phy_mode) {
+ case PHY_INTERFACE_MODE_RGMII:
+ case PHY_INTERFACE_MODE_RGMII_ID:
+ case PHY_INTERFACE_MODE_RGMII_RXID:
+ case PHY_INTERFACE_MODE_RGMII_TXID:
+ plat_dat->fix_mac_speed = ethqos_fix_mac_speed_rgmii;
+ break;
+ case PHY_INTERFACE_MODE_2500BASEX:
+ case PHY_INTERFACE_MODE_SGMII:
+ plat_dat->fix_mac_speed = ethqos_fix_mac_speed_sgmii;
+ break;
+ default:
+ break;
+ }
+
+ plat_dat->set_clk_tx_rate = ethqos_set_clk_tx_rate;
+ plat_dat->dump_debug_regs = rgmii_dump;
+
+ return 0;
+}
+
static int qcom_ethqos_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
@@ -706,23 +770,20 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
"dt configuration failed\n");
}
- plat_dat->clks_config = ethqos_clks_config;
-
ethqos = devm_kzalloc(dev, sizeof(*ethqos), GFP_KERNEL);
if (!ethqos)
return -ENOMEM;
ethqos->phy_mode = plat_dat->phy_interface;
+
switch (ethqos->phy_mode) {
case PHY_INTERFACE_MODE_RGMII:
case PHY_INTERFACE_MODE_RGMII_ID:
case PHY_INTERFACE_MODE_RGMII_RXID:
case PHY_INTERFACE_MODE_RGMII_TXID:
- plat_dat->fix_mac_speed = ethqos_fix_mac_speed_rgmii;
break;
case PHY_INTERFACE_MODE_2500BASEX:
case PHY_INTERFACE_MODE_SGMII:
- plat_dat->fix_mac_speed = ethqos_fix_mac_speed_sgmii;
plat_dat->mac_finish = ethqos_mac_finish_serdes;
break;
default:
@@ -732,24 +793,13 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
}
ethqos->pdev = pdev;
- ethqos->rgmii_base = devm_platform_ioremap_resource_byname(pdev, "rgmii");
- if (IS_ERR(ethqos->rgmii_base))
- return dev_err_probe(dev, PTR_ERR(ethqos->rgmii_base),
- "Failed to map rgmii resource\n");
-
data = of_device_get_match_data(dev);
ethqos->data = data;
- ethqos->link_clk = devm_clk_get(dev, data->link_clk_name ?: "rgmii");
- if (IS_ERR(ethqos->link_clk))
- return dev_err_probe(dev, PTR_ERR(ethqos->link_clk),
- "Failed to get link_clk\n");
-
- ret = ethqos_clks_config(ethqos, true);
- if (ret)
- return ret;
+ if (WARN_ON(!data->setup))
+ return -EINVAL;
- ret = devm_add_action_or_reset(dev, ethqos_clks_disable, ethqos);
+ ret = data->setup(ethqos, plat_dat);
if (ret)
return ret;
@@ -758,21 +808,8 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
return dev_err_probe(dev, PTR_ERR(ethqos->serdes_phy),
"Failed to get serdes phy\n");
- ethqos_set_clk_tx_rate(ethqos, NULL, plat_dat->phy_interface,
- SPEED_1000);
-
- qcom_ethqos_set_sgmii_loopback(ethqos, true);
- ethqos_set_func_clk_en(ethqos);
-
- /* The clocks are controlled by firmware, so we don't know for certain
- * what clock rate is being used. Hardware documentation mentions that
- * the AHB slave clock will be in the range of 50 to 100MHz, which
- * equates to a MDC between 1.19 and 2.38MHz.
- */
plat_dat->clk_csr = STMMAC_CSR_60_100M;
plat_dat->bsp_priv = ethqos;
- plat_dat->set_clk_tx_rate = ethqos_set_clk_tx_rate;
- plat_dat->dump_debug_regs = rgmii_dump;
plat_dat->ptp_clk_freq_config = ethqos_ptp_clk_freq_config;
plat_dat->core_type = DWMAC_CORE_GMAC4;
if (data->has_emac_ge_3)
--
2.47.3
^ permalink raw reply related
* [PATCH net-next v12 7/7] net: stmmac: qcom-ethqos: add support for sa8255p
From: Bartosz Golaszewski @ 2026-07-06 13:20 UTC (permalink / raw)
To: Bjorn Andersson, Konrad Dybcio, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Andrew Lunn, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Maxime Coquelin, Alexandre Torgue,
Vinod Koul, Giuseppe Cavallaro, Chen-Yu Tsai, Jernej Skrabec,
Neil Armstrong, Kevin Hilman, Jerome Brunet, Shawn Guo,
Fabio Estevam, Jan Petrous, s32, Mohd Ayaan Anwar, Romain Gantois,
Geert Uytterhoeven, Magnus Damm, Maxime Ripard,
Christophe Roullier, Bartosz Golaszewski, Radu Rendec
Cc: linux-arm-msm, devicetree, linux-kernel, netdev, linux-stm32,
linux-arm-kernel, Drew Fustini, linux-sunxi, linux-amlogic,
linux-mips, imx, linux-renesas-soc, linux-rockchip, sophgo,
linux-riscv, brgl, Bartosz Golaszewski, Bartosz Golaszewski
In-Reply-To: <20260706-qcom-sa8255p-emac-v12-0-e3ab1ecf2901@oss.qualcomm.com>
Extend the driver to support a new model - sa8255p. Unlike the previously
supported variants, this one's power management is done in the firmware
over SCMI. This is modeled in linux using power domains so add a new
emac data variant and a separate setup callback.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
.../ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c | 83 ++++++++++++++++++++++
1 file changed, 83 insertions(+)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
index f379570f80680e96f027873cda6a6bca398e22dc..47175670a32631369a2cf8b00388d9359513e090 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
@@ -108,6 +108,7 @@ struct qcom_ethqos {
struct clk *link_clk;
struct phy *serdes_phy;
phy_interface_t phy_mode;
+ struct dev_pm_domain_list *pds;
const struct ethqos_emac_driver_data *data;
};
@@ -206,6 +207,8 @@ static void ethqos_set_func_clk_en(struct qcom_ethqos *ethqos)
static int ethqos_hlos_setup(struct qcom_ethqos *ethqos,
struct plat_stmmacenet_data *plat_dat);
+static int ethqos_scmi_setup(struct qcom_ethqos *ethqos,
+ struct plat_stmmacenet_data *plat_dat);
static const struct ethqos_emac_por emac_v2_3_0_por[] = {
{ .offset = RGMII_IO_MACRO_CONFIG, .value = 0x00C01343 },
@@ -310,6 +313,29 @@ static const struct ethqos_emac_driver_data emac_v4_0_0_data = {
.setup = ethqos_hlos_setup,
};
+static const struct ethqos_emac_driver_data emac_v4_0_0_scmi_data = {
+ .has_emac_ge_3 = true,
+ .needs_sgmii_loopback = true,
+ .dma_addr_width = 36,
+ .dwmac4_addrs = {
+ .dma_chan = 0x00008100,
+ .dma_chan_offset = 0x1000,
+ .mtl_chan = 0x00008000,
+ .mtl_chan_offset = 0x1000,
+ .mtl_ets_ctrl = 0x00008010,
+ .mtl_ets_ctrl_offset = 0x1000,
+ .mtl_txq_weight = 0x00008018,
+ .mtl_txq_weight_offset = 0x1000,
+ .mtl_send_slp_cred = 0x0000801c,
+ .mtl_send_slp_cred_offset = 0x1000,
+ .mtl_high_cred = 0x00008020,
+ .mtl_high_cred_offset = 0x1000,
+ .mtl_low_cred = 0x00008024,
+ .mtl_low_cred_offset = 0x1000,
+ },
+ .setup = ethqos_scmi_setup,
+};
+
static int ethqos_dll_configure(struct qcom_ethqos *ethqos)
{
struct device *dev = ðqos->pdev->dev;
@@ -749,6 +775,62 @@ static int ethqos_hlos_setup(struct qcom_ethqos *ethqos,
return 0;
}
+static const char *const ethqos_scmi_pd_names[] = { "core", "mdio" };
+
+static int ethqos_scmi_setup(struct qcom_ethqos *ethqos,
+ struct plat_stmmacenet_data *plat_dat)
+{
+ const struct dev_pm_domain_attach_data pd_data = {
+ .pd_names = ethqos_scmi_pd_names,
+ .num_pd_names = ARRAY_SIZE(ethqos_scmi_pd_names),
+ .pd_flags = PD_FLAG_DEV_LINK_ON,
+ };
+
+ struct platform_device *pdev = ethqos->pdev;
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ ret = devm_pm_domain_attach_list(dev, &pd_data, ðqos->pds);
+ if (ret < 0)
+ return dev_err_probe(dev, ret,
+ "Failed to attach power domains\n");
+
+ /*
+ * The SerDes lane, its clocks and the MAC AXI/AHB clocks are owned by
+ * firmware and brought up through the SCMI power domains above. The
+ * MAC wrapper itself, however is in the kernel's register space: the
+ * mux that feeds the SerDes recovered RX clock into the MAC's clk_rx_i
+ * is not configured by firmware. Without it, clk_rx_i never toggles
+ * and the DMA SW-reset polled in dwmac4_dma_reset() never completes.
+ *
+ * Map the wrapper and program the same loopback/functional clock bits
+ * the non-firmware platforms rely on (see ethqos_clks_config) so the
+ * RX clock is present by the time the DMA engine is reset.
+ */
+ ethqos->rgmii_base = devm_platform_ioremap_resource_byname(pdev, "rgmii");
+ if (IS_ERR(ethqos->rgmii_base))
+ return dev_err_probe(dev, PTR_ERR(ethqos->rgmii_base),
+ "Failed to map rgmii resource\n");
+
+ /*
+ * Run on every runtime resume, which stmmac performs after the power
+ * domains are on but before serdes_powerup() and the DMA reset, so the
+ * wrapper is always configured ahead of the reset.
+ */
+ plat_dat->clks_config = ethqos_clks_config;
+
+ switch (ethqos->phy_mode) {
+ case PHY_INTERFACE_MODE_2500BASEX:
+ case PHY_INTERFACE_MODE_SGMII:
+ plat_dat->fix_mac_speed = ethqos_fix_mac_speed_sgmii;
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
static int qcom_ethqos_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
@@ -836,6 +918,7 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
static const struct of_device_id qcom_ethqos_match[] = {
{ .compatible = "qcom,qcs404-ethqos", .data = &emac_v2_3_0_data},
+ { .compatible = "qcom,sa8255p-ethqos", .data = &emac_v4_0_0_scmi_data},
{ .compatible = "qcom,sa8775p-ethqos", .data = &emac_v4_0_0_data},
{ .compatible = "qcom,sc8280xp-ethqos", .data = &emac_v3_0_0_data},
{ .compatible = "qcom,sm8150-ethqos", .data = &emac_v2_1_0_data},
--
2.47.3
^ permalink raw reply related
* Re: [PATCH net-next v9 6/6] riscv: dts: eswin: eic7700-hifive-premier-p550: enable Ethernet controller
From: Conor Dooley @ 2026-07-06 13:21 UTC (permalink / raw)
To: Paolo Abeni
Cc: robh, krzk+dt, conor+dt, ningyu, linmin, alexandre.torgue,
mcoquelin.stm32, pinkesh.vaghela, pritesh.patel,
maxime.chevallier, linux-arm-kernel, linux-stm32, linux-riscv,
palmer, pjw, weishangjuan, horms, alex, lee, wens, lizhi2,
devicetree, andrew+netdev, davem, edumazet, kuba, netdev,
rmk+kernel, aou, linux-kernel
In-Reply-To: <8e5eb97d-dfaf-47a1-8572-b3252a2c7ed3@redhat.com>
[-- Attachment #1: Type: text/plain, Size: 1164 bytes --]
On Mon, Jul 06, 2026 at 03:09:37PM +0200, Paolo Abeni wrote:
> On 6/30/26 8:34 AM, lizhi2@eswincomputing.com wrote:
> > From: Zhi Li <lizhi2@eswincomputing.com>
> >
> > Enable the on-board Gigabit Ethernet controller on the
> > HiFive Premier P550 development board.
> >
> > This patch is included only to provide the DTS context for reviewing the
> > binding and driver changes in this series.
> >
> > The upstream DTS series will be submitted separately after the binding
> > and driver changes are finalized.
> >
> > Signed-off-by: Zhi Li <lizhi2@eswincomputing.com>
>
> @Rob, Krzysztof, Conor: I see this patch is not listed in the devicetree
> PW, but I think it needs explicit acks from relevant SMEs. Could you
> please have a look?
We do not typical provide tags from dts patches, but that's irrelevant
for you, because this (and effectively all other dts) patch(es) should
not go through the net tree to begin with.
Instead, the platform maintainers should review and/or apply it.
Additionally, it seems the contributor's commit message suggests
that they didn't intend this patch to be applied at all?
Cheers,
Conor.
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]
^ permalink raw reply
* [ANN] patch processing delays expected
From: Paolo Abeni @ 2026-07-06 13:23 UTC (permalink / raw)
To: netdev@vger.kernel.org
hi,
As you have likely already noticed, maintainers capacity is currently
limited due to holidays and conferences and you will experience
measurable delays in patch processing compared to netdev standards.
This contingency is expected to last for the current week and the
following one. Please be conscious to try to avoid unneeded ML traffic
that will slow patch processing even more.
Thanks,
Paolo
^ permalink raw reply
* Re: [PATCH net v2] tun/tap & vhost-net: make qdisc backpressure opt-in via IFF_BACKPRESSURE
From: Michael S. Tsirkin @ 2026-07-06 13:23 UTC (permalink / raw)
To: Brett A C Sheffield
Cc: Simon Schippers, Willem de Bruijn, Jason Wang, David S . Miller,
Eric Dumazet, Jakub Kicinski, Paolo Abeni, netdev, Simon Horman,
Jonathan Corbet, Shuah Khan, Andrew Lunn, Tim Gebauer, linux-doc,
linux-kernel
In-Reply-To: <akt_Q7kdR3Zb8_GZ@karahi.librecast.net>
On Mon, Jul 06, 2026 at 12:11:15PM +0200, Brett A C Sheffield wrote:
> On 2026-07-06 11:42, Simon Schippers wrote:
> > Commit 1d6e569b7d0c ("tun/tap & vhost-net: avoid ptr_ring tail-drop
> > when a qdisc is present") did not show a relevant performance regression
> > in my testing but on Brett Sheffield's librecast testbed it shows a
> > significant performance drop in a IPv6 multicast testcase. The regression
> > can be pinpointed when multiple iperf3 UDP threads are sending. For 8
> > threads the performance dropped from 13.5 Gbit/s to 9.13 Gbit/s. This is
> > the reason why this patch makes the qdisc backpressure behavior opt-in.
>
> Your v1 commit message was correct. The iperf3 tests were TCP, not UDP.
>
> The original failing test that alerted me to the problem was IPv6 multicast
> (UDP), but the reproducer tests I provided stats for in the regression report
> were TCP "To eliminate my code and any multicast weirdness" and also to verify
> that this also affected TCP.
>
> Sorry for the confusion. The command lines used are in the regression report.
>
> I've tested the v2 patch (with IPv6 multicast), and verified the
> previously failing test passes.
>
> Tested-by: Brett A C Sheffield <bacs@librecast.net>
>
> Cheers,
Just to clarify, it's more of a work-around, not a fix.
It's not really great to have a flag that says "change something
opaque in the internals of the device, it affects performance
in some way, we can't predict how".
So maybe we really should revert for now, and work on something
more coherent for the next linux.
>
> Brett
> --
> Brett Sheffield (he/him)
> Librecast - Decentralising the Internet with Multicast
> https://librecast.net/
> https://blog.brettsheffield.com/
^ permalink raw reply
* [PATCH v3 09/20] iommu/fsl: use platform_device_set_of_node()
From: Bartosz Golaszewski @ 2026-07-06 12:44 UTC (permalink / raw)
To: Lee Jones, Mark Brown, Thierry Reding, Sebastian Hesselbarth,
Andrew Lunn, David S. Miller, Eric Dumazet, Jakub Kicinski,
Paolo Abeni, Srinivas Kandagatla, Greg Kroah-Hartman, Vinod Koul,
Rafael J. Wysocki, Danilo Krummrich, Rob Herring, Saravana Kannan,
Madhavan Srinivasan, Michael Ellerman, Nicholas Piggin,
Christophe Leroy (CS GROUP), Andi Shyti, Andy Shevchenko,
Joerg Roedel, Will Deacon, Robin Murphy, Doug Berger,
Florian Fainelli, Broadcom internal kernel review list,
Ulf Hansson, Frank Li, Sascha Hauer, Pengutronix Kernel Team,
Fabio Estevam, Matthew Brost, Thomas Hellström, Rodrigo Vivi,
David Airlie, Simona Vetter, Peter Chen, Paul Cercueil, Bin Liu,
Philipp Zabel, Maximilian Luz, Hans de Goede, Ilpo Järvinen,
Krzysztof Kozlowski, Benjamin Herrenschmidt
Cc: brgl, linux-kernel, netdev, linux-arm-msm, linux-sound,
driver-core, devicetree, linuxppc-dev, linux-i2c, iommu, linux-pm,
imx, linux-arm-kernel, intel-xe, dri-devel, linux-usb, linux-mips,
platform-driver-x86, mfd, Bartosz Golaszewski
In-Reply-To: <20260706-pdev-fwnode-ref-v3-0-1ff028e33779@oss.qualcomm.com>
Ahead of reworking the reference counting logic for platform devices,
encapsulate the assignment of the OF node for dynamically allocated
platform devices with the provided helper.
Acked-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
drivers/iommu/fsl_pamu.c | 16 ++++++----------
1 file changed, 6 insertions(+), 10 deletions(-)
diff --git a/drivers/iommu/fsl_pamu.c b/drivers/iommu/fsl_pamu.c
index 25aa477a95a95cb4fa4e132727cde0a936750ee2..c83bbc3faad56d6ee1c89b0a7f74028af02c81e9 100644
--- a/drivers/iommu/fsl_pamu.c
+++ b/drivers/iommu/fsl_pamu.c
@@ -8,6 +8,7 @@
#include "fsl_pamu.h"
+#include <linux/cleanup.h>
#include <linux/fsl/guts.h>
#include <linux/interrupt.h>
#include <linux/genalloc.h>
@@ -933,7 +934,6 @@ static struct platform_driver fsl_of_pamu_driver = {
static __init int fsl_pamu_init(void)
{
struct platform_device *pdev = NULL;
- struct device_node *np;
int ret;
/*
@@ -955,7 +955,8 @@ static __init int fsl_pamu_init(void)
* PAMU node would require significant changes to a lot of code.
*/
- np = of_find_compatible_node(NULL, NULL, "fsl,pamu");
+ struct device_node *np __free(device_node) =
+ of_find_compatible_node(NULL, NULL, "fsl,pamu");
if (!np) {
pr_err("could not find a PAMU node\n");
return -ENODEV;
@@ -964,7 +965,7 @@ static __init int fsl_pamu_init(void)
ret = platform_driver_register(&fsl_of_pamu_driver);
if (ret) {
pr_err("could not register driver (err=%i)\n", ret);
- goto error_driver_register;
+ return ret;
}
pdev = platform_device_alloc("fsl-of-pamu", 0);
@@ -973,7 +974,8 @@ static __init int fsl_pamu_init(void)
ret = -ENOMEM;
goto error_device_alloc;
}
- pdev->dev.of_node = of_node_get(np);
+
+ platform_device_set_of_node(pdev, np);
ret = pamu_domain_init();
if (ret)
@@ -988,17 +990,11 @@ static __init int fsl_pamu_init(void)
return 0;
error_device_add:
- of_node_put(pdev->dev.of_node);
- pdev->dev.of_node = NULL;
-
platform_device_put(pdev);
error_device_alloc:
platform_driver_unregister(&fsl_of_pamu_driver);
-error_driver_register:
- of_node_put(np);
-
return ret;
}
arch_initcall(fsl_pamu_init);
--
2.47.3
^ permalink raw reply related
* [PATCH v3 12/20] mfd: tps6586: use platform_device_set_of_node()
From: Bartosz Golaszewski @ 2026-07-06 12:44 UTC (permalink / raw)
To: Lee Jones, Mark Brown, Thierry Reding, Sebastian Hesselbarth,
Andrew Lunn, David S. Miller, Eric Dumazet, Jakub Kicinski,
Paolo Abeni, Srinivas Kandagatla, Greg Kroah-Hartman, Vinod Koul,
Rafael J. Wysocki, Danilo Krummrich, Rob Herring, Saravana Kannan,
Madhavan Srinivasan, Michael Ellerman, Nicholas Piggin,
Christophe Leroy (CS GROUP), Andi Shyti, Andy Shevchenko,
Joerg Roedel, Will Deacon, Robin Murphy, Doug Berger,
Florian Fainelli, Broadcom internal kernel review list,
Ulf Hansson, Frank Li, Sascha Hauer, Pengutronix Kernel Team,
Fabio Estevam, Matthew Brost, Thomas Hellström, Rodrigo Vivi,
David Airlie, Simona Vetter, Peter Chen, Paul Cercueil, Bin Liu,
Philipp Zabel, Maximilian Luz, Hans de Goede, Ilpo Järvinen,
Krzysztof Kozlowski, Benjamin Herrenschmidt
Cc: brgl, linux-kernel, netdev, linux-arm-msm, linux-sound,
driver-core, devicetree, linuxppc-dev, linux-i2c, iommu, linux-pm,
imx, linux-arm-kernel, intel-xe, dri-devel, linux-usb, linux-mips,
platform-driver-x86, mfd, Bartosz Golaszewski
In-Reply-To: <20260706-pdev-fwnode-ref-v3-0-1ff028e33779@oss.qualcomm.com>
Ahead of reworking the reference counting logic for platform devices,
encapsulate the assignment of the OF node for dynamically allocated
platform devices with the provided helper.
Acked-by: Lee Jones <lee@kernel.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
drivers/mfd/tps6586x.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mfd/tps6586x.c b/drivers/mfd/tps6586x.c
index f5f805446603315ba76ce1fc501c908f1cec0d16..3cfd2f02b62f3cc370e0d970ec2643b638fd0fec 100644
--- a/drivers/mfd/tps6586x.c
+++ b/drivers/mfd/tps6586x.c
@@ -397,7 +397,7 @@ static int tps6586x_add_subdevs(struct tps6586x *tps6586x,
pdev->dev.parent = tps6586x->dev;
pdev->dev.platform_data = subdev->platform_data;
- pdev->dev.of_node = of_node_get(subdev->of_node);
+ platform_device_set_of_node(pdev, subdev->of_node);
ret = platform_device_add(pdev);
if (ret) {
--
2.47.3
^ permalink raw reply related
* Re: [PATCH net] macsec: don't read an unset MAC header in macsec_encrypt()
From: Sabrina Dubroca @ 2026-07-06 13:31 UTC (permalink / raw)
To: Daehyeon Ko
Cc: netdev, Andrew Lunn, David S . Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, linux-kernel, stable
In-Reply-To: <20260703083634.2035145-1-4ncienth@gmail.com>
2026-07-03, 17:36:33 +0900, Daehyeon Ko wrote:
> macsec_encrypt() reads the Ethernet header via eth_hdr(skb)
> (skb->head + skb->mac_header) to memmove() the 12 source/destination MAC
> bytes forward and make room for the SecTAG.
>
> On the AF_PACKET SOCK_RAW + PACKET_QDISC_BYPASS transmit path the skb
> reaches the macsec ndo_start_xmit() with the MAC header unset, so
> eth_hdr(skb) resolves to skb->head + (u16)~0 and the read is out of
> bounds: a 12-byte heap over-read that is also emitted on the wire as the
> frame's outer source/destination MAC. KASAN reports a slab-out-of-bounds
> read in macsec_start_xmit() on 6.0; on current mainline a CONFIG_DEBUG_NET
> build flags it as an unset mac header in skb_mac_header().
>
> On the TX path the L2 header is at skb->data, so use skb_eth_hdr(), added
> by commit 96cc4b69581d ("macvlan: do not assume mac_header is set in
> macvlan_broadcast()") for exactly this purpose.
>
> Fixes: c09440f7dcb3 ("macsec: introduce IEEE 802.1AE driver")
> Cc: stable@vger.kernel.org
> Signed-off-by: Daehyeon Ko <4ncienth@gmail.com>
> ---
> drivers/net/macsec.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
--
Sabrina
^ permalink raw reply
* Re: [PATCH net-next v9 6/6] riscv: dts: eswin: eic7700-hifive-premier-p550: enable Ethernet controller
From: Paolo Abeni @ 2026-07-06 13:34 UTC (permalink / raw)
To: Conor Dooley
Cc: robh, krzk+dt, conor+dt, ningyu, linmin, alexandre.torgue,
mcoquelin.stm32, pinkesh.vaghela, pritesh.patel,
maxime.chevallier, linux-arm-kernel, linux-stm32, linux-riscv,
palmer, pjw, weishangjuan, horms, alex, lee, wens, lizhi2,
devicetree, andrew+netdev, davem, edumazet, kuba, netdev,
rmk+kernel, aou, linux-kernel
In-Reply-To: <20260706-confess-dagger-e60b5fad57e8@spud>
On 7/6/26 3:21 PM, Conor Dooley wrote:
> On Mon, Jul 06, 2026 at 03:09:37PM +0200, Paolo Abeni wrote:
>> On 6/30/26 8:34 AM, lizhi2@eswincomputing.com wrote:
>>> From: Zhi Li <lizhi2@eswincomputing.com>
>>>
>>> Enable the on-board Gigabit Ethernet controller on the
>>> HiFive Premier P550 development board.
>>>
>>> This patch is included only to provide the DTS context for reviewing the
>>> binding and driver changes in this series.
>>>
>>> The upstream DTS series will be submitted separately after the binding
>>> and driver changes are finalized.
>>>
>>> Signed-off-by: Zhi Li <lizhi2@eswincomputing.com>
>>
>> @Rob, Krzysztof, Conor: I see this patch is not listed in the devicetree
>> PW, but I think it needs explicit acks from relevant SMEs. Could you
>> please have a look?
>
> We do not typical provide tags from dts patches, but that's irrelevant
> for you, because this (and effectively all other dts) patch(es) should
> not go through the net tree to begin with.
> Instead, the platform maintainers should review and/or apply it.
>
> Additionally, it seems the contributor's commit message suggests
> that they didn't intend this patch to be applied at all?
Thanks for the head-up.
I noticed a bit too late that part of the discussion about this patch
did not land on the netdev ML; a new revision is expected.
/P
^ permalink raw reply
* [PATCH net-next 0/7] hardware pacing offload
From: Willem de Bruijn @ 2026-07-06 13:34 UTC (permalink / raw)
To: netdev; +Cc: davem, kuba, edumazet, pabeni, horms, andrew, Willem de Bruijn
From: Willem de Bruijn <willemb@google.com>
Enable safe hardware pacing offload on a first device (idpf), plus support.
- Add ethtool support for admin control over the device feature
- Add device support to the idpf driver
Besides the main feature, also
- Small optimization to FQ offload: avoid unnecessary ktime_.._get().
- Expand so_txtime drv-net test with hw offload testcases.
- Expand pktgen with txtime feature.
Details in the individual patches.
Willem de Bruijn (7):
net: ethtool: add hardware pacing offload support to rings
net_sched: sch_fq: clear past skb->tstamp if offloading pacing
idpf: support pacing offload
selftests: drv-net: refactor so_txtime errqueue handling
selftests: drv-net: in so_txtime tell apart sw from hw pacing
selftests: drv-net: extend so_txtime with hw offload
net: pktgen: add support for SO_TXTIME
Documentation/netlink/specs/ethtool.yaml | 6 +
.../networking/net_cachelines/net_device.rst | 3 +-
.../net/ethernet/intel/idpf/idpf_ethtool.c | 3 +-
drivers/net/ethernet/intel/idpf/idpf_lib.c | 5 +
drivers/net/ethernet/intel/idpf/idpf_txrx.c | 63 +++++++-
drivers/net/ethernet/intel/idpf/idpf_txrx.h | 2 +
include/linux/ethtool.h | 6 +
include/linux/netdevice.h | 6 +-
.../uapi/linux/ethtool_netlink_generated.h | 2 +
net/core/pktgen.c | 85 ++++++++++
net/core/rtnetlink.c | 2 +-
net/ethtool/common.c | 3 +
net/ethtool/netlink.h | 2 +-
net/ethtool/rings.c | 30 +++-
net/sched/sch_fq.c | 21 ++-
tools/testing/selftests/drivers/net/settings | 1 +
.../testing/selftests/drivers/net/so_txtime.c | 147 +++++++++++++-----
.../selftests/drivers/net/so_txtime.py | 72 ++++++++-
18 files changed, 399 insertions(+), 60 deletions(-)
create mode 100644 tools/testing/selftests/drivers/net/settings
--
2.55.0.795.g602f6c329a-goog
^ permalink raw reply
* [PATCH net-next 1/7] net: ethtool: add hardware pacing offload support to rings
From: Willem de Bruijn @ 2026-07-06 13:34 UTC (permalink / raw)
To: netdev; +Cc: davem, kuba, edumazet, pabeni, horms, andrew, Willem de Bruijn
In-Reply-To: <20260706133433.3142805-1-willemdebruijn.kernel@gmail.com>
From: Willem de Bruijn <willemb@google.com>
Add two ethtool rings operations:
- get pacing offload horizon: active and max
- set pacing offload horizon: active
Replace u64 max_pacing_offload_horizon with u32 active and max fields.
This occupies the same original 8 bytes. Reduce precision from nsec to
usec, which is sufficient.
Update the FQ scheduler to test against the active limit instead of
max. It is the administrator responsibility to set the active limit
before installing FQ.
Assisted-by: Gemini:gemini-3
Signed-off-by: Willem de Bruijn <willemb@google.com>
---
Documentation/netlink/specs/ethtool.yaml | 6 ++++
.../networking/net_cachelines/net_device.rst | 3 +-
include/linux/ethtool.h | 6 ++++
include/linux/netdevice.h | 6 ++--
.../uapi/linux/ethtool_netlink_generated.h | 2 ++
net/core/rtnetlink.c | 2 +-
net/ethtool/common.c | 3 ++
net/ethtool/netlink.h | 2 +-
net/ethtool/rings.c | 30 +++++++++++++++++--
net/sched/sch_fq.c | 3 +-
10 files changed, 55 insertions(+), 8 deletions(-)
diff --git a/Documentation/netlink/specs/ethtool.yaml b/Documentation/netlink/specs/ethtool.yaml
index 5dd4d1b5d94b..48f43dda2e6e 100644
--- a/Documentation/netlink/specs/ethtool.yaml
+++ b/Documentation/netlink/specs/ethtool.yaml
@@ -448,6 +448,12 @@ attribute-sets:
-
name: hds-thresh-max
type: u32
+ -
+ name: pacing-offload-horizon
+ type: u32
+ -
+ name: pacing-offload-horizon-max
+ type: u32
-
name: mm-stat
diff --git a/Documentation/networking/net_cachelines/net_device.rst b/Documentation/networking/net_cachelines/net_device.rst
index 512f6d6fa3d8..3b9ce1c6e105 100644
--- a/Documentation/networking/net_cachelines/net_device.rst
+++ b/Documentation/networking/net_cachelines/net_device.rst
@@ -183,7 +183,8 @@ struct devlink_port* devlink_port
struct dpll_pin* dpll_pin
struct hlist_head page_pools
struct dim_irq_moder* irq_moder
-u64 max_pacing_offload_horizon
+u32 pacing_offload_horizon
+u32 max_pacing_offload_horizon
struct_napi_config* napi_config
unsigned_long gro_flush_timeout
u32 napi_defer_hard_irqs
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index 5d491a98265e..5759be3fcd7f 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -85,6 +85,8 @@ enum {
* @tx_push_buf_max_len: Maximum allowed size of TX push buffer
* @hds_thresh: Packet size threshold for header data split (HDS)
* @hds_thresh_max: Maximum supported setting for @hds_threshold
+ * @pacing_offload_horizon: pacing offload horizon value in usec.
+ * @max_pacing_offload_horizon: max pacing offload horizon value in usec.
*
*/
struct kernel_ethtool_ringparam {
@@ -97,6 +99,8 @@ struct kernel_ethtool_ringparam {
u32 tx_push_buf_max_len;
u32 hds_thresh;
u32 hds_thresh_max;
+ u32 pacing_offload_horizon;
+ u32 max_pacing_offload_horizon;
};
/**
@@ -108,6 +112,7 @@ struct kernel_ethtool_ringparam {
* @ETHTOOL_RING_USE_TX_PUSH_BUF_LEN: capture for setting tx_push_buf_len
* @ETHTOOL_RING_USE_TCP_DATA_SPLIT: capture for setting tcp_data_split
* @ETHTOOL_RING_USE_HDS_THRS: capture for setting header-data-split-thresh
+ * @ETHTOOL_RING_USE_PACING_OFFLOAD_HORIZON: capture for setting pacing offload horizon
*/
enum ethtool_supported_ring_param {
ETHTOOL_RING_USE_RX_BUF_LEN = BIT(0),
@@ -117,6 +122,7 @@ enum ethtool_supported_ring_param {
ETHTOOL_RING_USE_TX_PUSH_BUF_LEN = BIT(4),
ETHTOOL_RING_USE_TCP_DATA_SPLIT = BIT(5),
ETHTOOL_RING_USE_HDS_THRS = BIT(6),
+ ETHTOOL_RING_USE_PACING_OFFLOAD_HORIZON = BIT(7),
};
#define __ETH_RSS_HASH_BIT(bit) ((u32)1 << (bit))
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 9981d637f8b5..cf777a58b328 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2127,7 +2127,8 @@ enum netdev_reg_state {
* @dpll_pin: Pointer to the SyncE source pin of a DPLL subsystem,
* where the clock is recovered.
*
- * @max_pacing_offload_horizon: max EDT offload horizon in nsec.
+ * @pacing_offload_horizon: active pacing offload horizon in usec.
+ * @max_pacing_offload_horizon: max pacing offload horizon in usec.
* @napi_config: An array of napi_config structures containing per-NAPI
* settings.
* @num_napi_configs: number of allocated NAPI config structs,
@@ -2547,7 +2548,8 @@ struct net_device {
/** @irq_moder: dim parameters used if IS_ENABLED(CONFIG_DIMLIB). */
struct dim_irq_moder *irq_moder;
- u64 max_pacing_offload_horizon;
+ u32 pacing_offload_horizon;
+ u32 max_pacing_offload_horizon;
struct napi_config *napi_config;
u32 num_napi_configs;
u32 napi_defer_hard_irqs;
diff --git a/include/uapi/linux/ethtool_netlink_generated.h b/include/uapi/linux/ethtool_netlink_generated.h
index 8134baf7860f..6f1a2fa36157 100644
--- a/include/uapi/linux/ethtool_netlink_generated.h
+++ b/include/uapi/linux/ethtool_netlink_generated.h
@@ -193,6 +193,8 @@ enum {
ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN_MAX,
ETHTOOL_A_RINGS_HDS_THRESH,
ETHTOOL_A_RINGS_HDS_THRESH_MAX,
+ ETHTOOL_A_RINGS_PACING_OFFLOAD_HORIZON,
+ ETHTOOL_A_RINGS_PACING_OFFLOAD_HORIZON_MAX,
__ETHTOOL_A_RINGS_CNT,
ETHTOOL_A_RINGS_MAX = (__ETHTOOL_A_RINGS_CNT - 1)
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 12aa3aa1688b..efcb219561ea 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -2124,7 +2124,7 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb,
nla_put_u32(skb, IFLA_TSO_MAX_SEGS,
READ_ONCE(dev->tso_max_segs)) ||
nla_put_uint(skb, IFLA_MAX_PACING_OFFLOAD_HORIZON,
- READ_ONCE(dev->max_pacing_offload_horizon)) ||
+ (u64)READ_ONCE(dev->max_pacing_offload_horizon) * NSEC_PER_USEC) ||
#ifdef CONFIG_RPS
nla_put_u32(skb, IFLA_NUM_RX_QUEUES,
READ_ONCE(dev->num_rx_queues)) ||
diff --git a/net/ethtool/common.c b/net/ethtool/common.c
index 23db40618fed..5c2323aaa02b 100644
--- a/net/ethtool/common.c
+++ b/net/ethtool/common.c
@@ -954,6 +954,9 @@ void ethtool_ringparam_get_cfg(struct net_device *dev,
/* Driver gives us current state, we want to return current config */
kparam->tcp_data_split = dev->cfg->hds_config;
kparam->hds_thresh = dev->cfg->hds_thresh;
+
+ kparam->pacing_offload_horizon = dev->pacing_offload_horizon;
+ kparam->max_pacing_offload_horizon = dev->max_pacing_offload_horizon;
}
static void ethtool_init_tsinfo(struct kernel_ethtool_ts_info *info)
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index 4ca2eca2e94b..fb0d99fd8cfd 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -466,7 +466,7 @@ extern const struct nla_policy ethnl_features_set_policy[ETHTOOL_A_FEATURES_WANT
extern const struct nla_policy ethnl_privflags_get_policy[ETHTOOL_A_PRIVFLAGS_HEADER + 1];
extern const struct nla_policy ethnl_privflags_set_policy[ETHTOOL_A_PRIVFLAGS_FLAGS + 1];
extern const struct nla_policy ethnl_rings_get_policy[ETHTOOL_A_RINGS_HEADER + 1];
-extern const struct nla_policy ethnl_rings_set_policy[ETHTOOL_A_RINGS_HDS_THRESH_MAX + 1];
+extern const struct nla_policy ethnl_rings_set_policy[ETHTOOL_A_RINGS_PACING_OFFLOAD_HORIZON_MAX + 1];
extern const struct nla_policy ethnl_channels_get_policy[ETHTOOL_A_CHANNELS_HEADER + 1];
extern const struct nla_policy ethnl_channels_set_policy[ETHTOOL_A_CHANNELS_COMBINED_COUNT + 1];
extern const struct nla_policy ethnl_coalesce_get_policy[ETHTOOL_A_COALESCE_HEADER + 1];
diff --git a/net/ethtool/rings.c b/net/ethtool/rings.c
index 9054c89c5d7b..3ff0cb57d03c 100644
--- a/net/ethtool/rings.c
+++ b/net/ethtool/rings.c
@@ -42,6 +42,8 @@ static int rings_prepare_data(const struct ethnl_req_info *req_base,
data->kernel_ringparam.tcp_data_split = dev->cfg->hds_config;
data->kernel_ringparam.hds_thresh = dev->cfg->hds_thresh;
+ data->kernel_ringparam.pacing_offload_horizon = dev->pacing_offload_horizon;
+ data->kernel_ringparam.max_pacing_offload_horizon = dev->max_pacing_offload_horizon;
dev->ethtool_ops->get_ringparam(dev, &data->ringparam,
&data->kernel_ringparam, info->extack);
@@ -69,7 +71,9 @@ static int rings_reply_size(const struct ethnl_req_info *req_base,
nla_total_size(sizeof(u32)) + /* _RINGS_TX_PUSH_BUF_LEN */
nla_total_size(sizeof(u32)) + /* _RINGS_TX_PUSH_BUF_LEN_MAX */
nla_total_size(sizeof(u32)) + /* _RINGS_HDS_THRESH */
- nla_total_size(sizeof(u32)); /* _RINGS_HDS_THRESH_MAX*/
+ nla_total_size(sizeof(u32)) + /* _RINGS_HDS_THRESH_MAX*/
+ nla_total_size(sizeof(u32)) + /* _RINGS_PACING_OFFLOAD_HORIZON */
+ nla_total_size(sizeof(u32)); /* _RINGS_PACING_OFFLOAD_HORIZON_MAX */
}
static int rings_fill_reply(struct sk_buff *skb,
@@ -121,7 +125,12 @@ static int rings_fill_reply(struct sk_buff *skb,
(nla_put_u32(skb, ETHTOOL_A_RINGS_HDS_THRESH,
kr->hds_thresh) ||
nla_put_u32(skb, ETHTOOL_A_RINGS_HDS_THRESH_MAX,
- kr->hds_thresh_max))))
+ kr->hds_thresh_max))) ||
+ ((supported_ring_params & ETHTOOL_RING_USE_PACING_OFFLOAD_HORIZON) &&
+ (nla_put_u32(skb, ETHTOOL_A_RINGS_PACING_OFFLOAD_HORIZON,
+ kr->pacing_offload_horizon) ||
+ nla_put_u32(skb, ETHTOOL_A_RINGS_PACING_OFFLOAD_HORIZON_MAX,
+ kr->max_pacing_offload_horizon))))
return -EMSGSIZE;
return 0;
@@ -144,6 +153,7 @@ const struct nla_policy ethnl_rings_set_policy[] = {
[ETHTOOL_A_RINGS_RX_PUSH] = NLA_POLICY_MAX(NLA_U8, 1),
[ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN] = { .type = NLA_U32 },
[ETHTOOL_A_RINGS_HDS_THRESH] = { .type = NLA_U32 },
+ [ETHTOOL_A_RINGS_PACING_OFFLOAD_HORIZON] = { .type = NLA_U32 },
};
static int
@@ -177,6 +187,14 @@ ethnl_set_rings_validate(struct ethnl_req_info *req_info,
return -EOPNOTSUPP;
}
+ if (tb[ETHTOOL_A_RINGS_PACING_OFFLOAD_HORIZON] &&
+ !(ops->supported_ring_params & ETHTOOL_RING_USE_PACING_OFFLOAD_HORIZON)) {
+ NL_SET_ERR_MSG_ATTR(info->extack,
+ tb[ETHTOOL_A_RINGS_PACING_OFFLOAD_HORIZON],
+ "setting pacing offload horizon is not supported");
+ return -EOPNOTSUPP;
+ }
+
if (tb[ETHTOOL_A_RINGS_CQE_SIZE] &&
!(ops->supported_ring_params & ETHTOOL_RING_USE_CQE_SIZE)) {
NL_SET_ERR_MSG_ATTR(info->extack,
@@ -246,6 +264,8 @@ ethnl_set_rings(struct ethnl_req_info *req_info, struct genl_info *info)
tb[ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN], &mod);
ethnl_update_u32(&kernel_ringparam.hds_thresh,
tb[ETHTOOL_A_RINGS_HDS_THRESH], &mod);
+ ethnl_update_u32(&kernel_ringparam.pacing_offload_horizon,
+ tb[ETHTOOL_A_RINGS_PACING_OFFLOAD_HORIZON], &mod);
if (!mod)
return 0;
@@ -281,6 +301,9 @@ ethnl_set_rings(struct ethnl_req_info *req_info, struct genl_info *info)
err_attr = tb[ETHTOOL_A_RINGS_TX];
else if (kernel_ringparam.hds_thresh > kernel_ringparam.hds_thresh_max)
err_attr = tb[ETHTOOL_A_RINGS_HDS_THRESH];
+ else if (kernel_ringparam.pacing_offload_horizon >
+ kernel_ringparam.max_pacing_offload_horizon)
+ err_attr = tb[ETHTOOL_A_RINGS_PACING_OFFLOAD_HORIZON];
else
err_attr = NULL;
if (err_attr) {
@@ -302,6 +325,9 @@ ethnl_set_rings(struct ethnl_req_info *req_info, struct genl_info *info)
ret = dev->ethtool_ops->set_ringparam(dev, &ringparam,
&kernel_ringparam, info->extack);
+ if (!ret)
+ dev->pacing_offload_horizon = kernel_ringparam.pacing_offload_horizon;
+
return ret < 0 ? ret : 1;
}
diff --git a/net/sched/sch_fq.c b/net/sched/sch_fq.c
index 7cae082a9847..d4cc8bc9fa06 100644
--- a/net/sched/sch_fq.c
+++ b/net/sched/sch_fq.c
@@ -1179,7 +1179,8 @@ static int fq_change(struct Qdisc *sch, struct nlattr *opt,
u64 offload_horizon = (u64)NSEC_PER_USEC *
nla_get_u32(tb[TCA_FQ_OFFLOAD_HORIZON]);
- if (offload_horizon <= qdisc_dev(sch)->max_pacing_offload_horizon) {
+ if (offload_horizon <=
+ (u64)qdisc_dev(sch)->pacing_offload_horizon * NSEC_PER_USEC) {
WRITE_ONCE(q->offload_horizon, offload_horizon);
} else {
NL_SET_ERR_MSG_MOD(extack, "invalid offload_horizon");
--
2.55.0.795.g602f6c329a-goog
^ permalink raw reply related
* [PATCH net-next 2/7] net_sched: sch_fq: clear past skb->tstamp if offloading pacing
From: Willem de Bruijn @ 2026-07-06 13:34 UTC (permalink / raw)
To: netdev; +Cc: davem, kuba, edumazet, pabeni, horms, andrew, Willem de Bruijn
In-Reply-To: <20260706133433.3142805-1-willemdebruijn.kernel@gmail.com>
From: Willem de Bruijn <willemb@google.com>
When hardware offload is enabled, FQ will forward packets to the
netdevice for pacing. The device has to test that skb->tstamp is
in the future.
Avoid this cost for packets whose txtime has already passed, by
clearing skb->tstamp.
Also disable timer drift logic when offload is enabled, because
time_next_packet can exceed now causing a negative value.
Signed-off-by: Willem de Bruijn <willemb@google.com>
---
Sashiko, ignore pre-existing issues. In particular, effects on
non-EDT packets and when queue or sk rate limit is set.
Sashiko, pacing offload is an optimization. Ignore that some packets
may not get offloaded, e.g., when txtime is a few usec in the future.
---
net/sched/sch_fq.c | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)
diff --git a/net/sched/sch_fq.c b/net/sched/sch_fq.c
index d4cc8bc9fa06..36006f69a875 100644
--- a/net/sched/sch_fq.c
+++ b/net/sched/sch_fq.c
@@ -399,6 +399,11 @@ static struct fq_flow *fq_classify(struct Qdisc *sch, struct sk_buff *skb,
READ_ONCE(sk->sk_pacing_status) != SK_PACING_FQ)
smp_store_release(&sk->sk_pacing_status,
SK_PACING_FQ);
+
+ if (q->offload_horizon &&
+ fq_skb_cb(skb)->time_to_send <= now)
+ skb->tstamp = 0;
+
return &q->internal;
}
@@ -707,6 +712,7 @@ static struct sk_buff *fq_dequeue(struct Qdisc *sch)
struct fq_sched_data *q = qdisc_priv(sch);
struct fq_perband_flows *pband;
struct fq_flow_head *head;
+ u64 time_next_packet;
struct sk_buff *skb;
struct fq_flow *f;
unsigned long rate;
@@ -721,7 +727,7 @@ static struct sk_buff *fq_dequeue(struct Qdisc *sch)
if (skb) {
q->internal.qlen--;
fq_dequeue_skb(sch, &q->internal, skb);
- goto out;
+ return skb;
}
now = ktime_get_ns();
@@ -758,8 +764,8 @@ static struct sk_buff *fq_dequeue(struct Qdisc *sch)
skb = fq_peek(f);
if (skb) {
- u64 time_next_packet = max_t(u64, fq_skb_cb(skb)->time_to_send,
- f->time_next_packet);
+ time_next_packet = max_t(u64, fq_skb_cb(skb)->time_to_send,
+ f->time_next_packet);
if (now + q->offload_horizon < time_next_packet) {
head->first = f->next;
@@ -828,11 +834,15 @@ static struct sk_buff *fq_dequeue(struct Qdisc *sch)
* f->time_next_packet was set when prior packet was sent,
* and current time (@now) can be too late by tens of us.
*/
- if (f->time_next_packet)
+ if (f->time_next_packet && f->time_next_packet < now)
len -= min(len/2, now - f->time_next_packet);
f->time_next_packet = now + len;
}
+
out:
+ if (q->offload_horizon && time_next_packet <= now)
+ skb->tstamp = 0;
+
return skb;
}
--
2.55.0.795.g602f6c329a-goog
^ permalink raw reply related
* [PATCH net-next 4/7] selftests: drv-net: refactor so_txtime errqueue handling
From: Willem de Bruijn @ 2026-07-06 13:34 UTC (permalink / raw)
To: netdev; +Cc: davem, kuba, edumazet, pabeni, horms, andrew, Willem de Bruijn
In-Reply-To: <20260706133433.3142805-1-willemdebruijn.kernel@gmail.com>
From: Willem de Bruijn <willemb@google.com>
Prepare error queue handling for upcoming SO_EE_ORIGIN_TIMESTAMPING
messages in the next patch in this series.
Convert do_recv_errqueue_timeout into dispatcher do_recv_errqueue
and move SO_EE_ORIGIN_TXTIME specific code into a separate helper.
This will make the next patch a lot more readable.
No functional changes.
Signed-off-by: Willem de Bruijn <willemb@google.com>
---
.../testing/selftests/drivers/net/so_txtime.c | 66 ++++++++++---------
1 file changed, 36 insertions(+), 30 deletions(-)
diff --git a/tools/testing/selftests/drivers/net/so_txtime.c b/tools/testing/selftests/drivers/net/so_txtime.c
index 55a386f3d1b9..7364ce2bec0b 100644
--- a/tools/testing/selftests/drivers/net/so_txtime.c
+++ b/tools/testing/selftests/drivers/net/so_txtime.c
@@ -158,7 +158,40 @@ static void do_recv_verify_empty(int fdr)
error(1, 0, "recv: not empty as expected (%d, %d)", ret, errno);
}
-static int do_recv_errqueue_timeout(int fdt)
+static int do_recv_errqueue_timeout(struct sock_extended_err *err,
+ const char payload_char)
+{
+ const char *reason = NULL;
+ int64_t tstamp = 0;
+
+ switch (err->ee_errno) {
+ case ECANCELED:
+ if (err->ee_code != SO_EE_CODE_TXTIME_MISSED)
+ error(1, 0, "errqueue: unknown ECANCELED %u\n",
+ err->ee_code);
+ reason = "missed txtime";
+ break;
+ case EINVAL:
+ if (err->ee_code != SO_EE_CODE_TXTIME_INVALID_PARAM)
+ error(1, 0, "errqueue: unknown EINVAL %u\n",
+ err->ee_code);
+ reason = "invalid txtime";
+ break;
+ default:
+ error(1, 0, "errqueue: errno %u code %u\n",
+ err->ee_errno, err->ee_code);
+ }
+
+ tstamp = ((int64_t)err->ee_data) << 32 | err->ee_info;
+ tstamp -= (int64_t)glob_tstart;
+ tstamp /= 1000 * 1000;
+ fprintf(stderr, "send: pkt %c at %" PRId64 "ms dropped: %s\n",
+ payload_char, tstamp, reason);
+
+ return 1;
+}
+
+static int do_recv_errqueue(int fdt)
{
char control[CMSG_SPACE(sizeof(struct sock_extended_err)) +
CMSG_SPACE(sizeof(struct sockaddr_in6))] = {0};
@@ -169,7 +202,6 @@ static int do_recv_errqueue_timeout(int fdt)
struct msghdr msg = {0};
struct iovec iov = {0};
struct cmsghdr *cm;
- int64_t tstamp = 0;
iov.iov_base = data;
iov.iov_len = sizeof(data);
@@ -181,8 +213,6 @@ static int do_recv_errqueue_timeout(int fdt)
msg.msg_controllen = sizeof(control);
while (1) {
- const char *reason = NULL;
-
ret = recvmsg(fdt, &msg, MSG_ERRQUEUE);
if (ret == -1 && errno == EAGAIN)
break;
@@ -201,33 +231,9 @@ static int do_recv_errqueue_timeout(int fdt)
if (err->ee_origin != SO_EE_ORIGIN_TXTIME)
error(1, 0, "errqueue: origin 0x%x\n", err->ee_origin);
- switch (err->ee_errno) {
- case ECANCELED:
- if (err->ee_code != SO_EE_CODE_TXTIME_MISSED)
- error(1, 0, "errqueue: unknown ECANCELED %u\n",
- err->ee_code);
- reason = "missed txtime";
- break;
- case EINVAL:
- if (err->ee_code != SO_EE_CODE_TXTIME_INVALID_PARAM)
- error(1, 0, "errqueue: unknown EINVAL %u\n",
- err->ee_code);
- reason = "invalid txtime";
- break;
- default:
- error(1, 0, "errqueue: errno %u code %u\n",
- err->ee_errno, err->ee_code);
- }
-
- tstamp = ((int64_t) err->ee_data) << 32 | err->ee_info;
- tstamp -= (int64_t) glob_tstart;
- tstamp /= 1000 * 1000;
- fprintf(stderr, "send: pkt %c at %" PRId64 "ms dropped: %s\n",
- data[ret - 1], tstamp, reason);
-
+ num_tstamp += do_recv_errqueue_timeout(err, data[ret - 1]);
msg.msg_flags = 0;
msg.msg_controllen = sizeof(control);
- num_tstamp++;
}
return num_tstamp;
@@ -245,7 +251,7 @@ static void recv_errqueue_msgs(int fdt)
error(1, errno, "poll");
if (ret && (pfd.revents & POLLERR))
- num_tstamp += do_recv_errqueue_timeout(fdt);
+ num_tstamp += do_recv_errqueue(fdt);
if (num_tstamp == cfg_num_pkt)
break;
--
2.55.0.795.g602f6c329a-goog
^ permalink raw reply related
* [PATCH net-next 5/7] selftests: drv-net: in so_txtime tell apart sw from hw pacing
From: Willem de Bruijn @ 2026-07-06 13:34 UTC (permalink / raw)
To: netdev; +Cc: davem, kuba, edumazet, pabeni, horms, andrew, Willem de Bruijn
In-Reply-To: <20260706133433.3142805-1-willemdebruijn.kernel@gmail.com>
From: Willem de Bruijn <willemb@google.com>
Detect software pacing in so_txtime.c using SO_TIMESTAMPING.
If '-h' (hw) is passed
1. measure sw tx delay with SOF_TIMESTAMPING_TX_SOFTWARE, and
2. fail if delay exceeds a threshold, indicating pacing
Also reorder getopt parameters to make them alphabetical.
Signed-off-by: Willem de Bruijn <willemb@google.com>
---
.../testing/selftests/drivers/net/so_txtime.c | 81 ++++++++++++++++---
1 file changed, 69 insertions(+), 12 deletions(-)
diff --git a/tools/testing/selftests/drivers/net/so_txtime.c b/tools/testing/selftests/drivers/net/so_txtime.c
index 7364ce2bec0b..5900ca97957c 100644
--- a/tools/testing/selftests/drivers/net/so_txtime.c
+++ b/tools/testing/selftests/drivers/net/so_txtime.c
@@ -42,8 +42,10 @@ static bool cfg_machine_slow;
static uint64_t cfg_start_time_ns;
static int cfg_mark;
static bool cfg_rx;
+static bool cfg_verify_hw_offload;
static uint64_t glob_tstart;
+static uint64_t glob_tstart_real;
static uint64_t tdeliver_max;
static int errors;
@@ -191,12 +193,32 @@ static int do_recv_errqueue_timeout(struct sock_extended_err *err,
return 1;
}
+static void do_recv_errqueue_timestamping(struct sock_extended_err *err,
+ struct scm_timestamping *tss)
+{
+ int64_t ts;
+
+ ts = tss->ts[0].tv_sec;
+ ts *= 1000ULL * 1000 * 1000;
+ ts += tss->ts[0].tv_nsec;
+ ts -= glob_tstart_real;
+ ts /= 1000;
+
+ if (ts > cfg_variance_us) {
+ fprintf(stderr, "sw delay %" PRId64 "us exceeds bounds\n", ts);
+ if (!cfg_machine_slow)
+ errors++;
+ }
+}
+
static int do_recv_errqueue(int fdt)
{
char control[CMSG_SPACE(sizeof(struct sock_extended_err)) +
+ CMSG_SPACE(sizeof(struct scm_timestamping)) +
CMSG_SPACE(sizeof(struct sockaddr_in6))] = {0};
char data[sizeof(struct ethhdr) + sizeof(struct ipv6hdr) +
sizeof(struct udphdr) + 1];
+ struct scm_timestamping *tss;
struct sock_extended_err *err;
int ret, num_tstamp = 0;
struct msghdr msg = {0};
@@ -222,16 +244,30 @@ static int do_recv_errqueue(int fdt)
error(1, 0, "errqueue: flags 0x%x\n", msg.msg_flags);
cm = CMSG_FIRSTHDR(&msg);
+ tss = NULL;
+
+ if (cm->cmsg_level == SOL_SOCKET &&
+ cm->cmsg_type == SCM_TIMESTAMPING) {
+ tss = (void *)CMSG_DATA(cm);
+ cm = CMSG_NXTHDR(&msg, cm);
+ if (!cm)
+ error(1, 0, "timestamp missing ip err\n");
+ }
+
if (cm->cmsg_level != cfg_errq_level ||
cm->cmsg_type != cfg_errq_type)
error(1, 0, "errqueue: type 0x%x.0x%x\n",
cm->cmsg_level, cm->cmsg_type);
err = (struct sock_extended_err *)CMSG_DATA(cm);
- if (err->ee_origin != SO_EE_ORIGIN_TXTIME)
+ if (err->ee_origin == SO_EE_ORIGIN_TXTIME)
+ num_tstamp += do_recv_errqueue_timeout(err,
+ data[ret - 1]);
+ else if (err->ee_origin == SO_EE_ORIGIN_TIMESTAMPING && tss)
+ do_recv_errqueue_timestamping(err, tss);
+ else
error(1, 0, "errqueue: origin 0x%x\n", err->ee_origin);
- num_tstamp += do_recv_errqueue_timeout(err, data[ret - 1]);
msg.msg_flags = 0;
msg.msg_controllen = sizeof(control);
}
@@ -256,7 +292,8 @@ static void recv_errqueue_msgs(int fdt)
if (num_tstamp == cfg_num_pkt)
break;
- } while (gettime_ns(cfg_clockid) < tdeliver_max);
+ } while (gettime_ns(cfg_clockid) <
+ tdeliver_max + (cfg_variance_us * 1000));
}
static void start_time_wait(void)
@@ -301,6 +338,18 @@ static void setsockopt_txtime(int fd)
error(1, 0, "getsockopt txtime: mismatch");
}
+static void setsockopt_txtimestamping(int fd)
+{
+ int val = SOF_TIMESTAMPING_TX_SOFTWARE |
+ SOF_TIMESTAMPING_SOFTWARE |
+ SOF_TIMESTAMPING_OPT_ID |
+ SOF_TIMESTAMPING_OPT_TSONLY;
+
+ if (setsockopt(fd, SOL_SOCKET, SO_TIMESTAMPING,
+ &val, sizeof(val)))
+ error(1, errno, "setsockopt timestamping");
+}
+
static int setup_tx(struct sockaddr *addr, socklen_t alen)
{
int fd;
@@ -314,6 +363,9 @@ static int setup_tx(struct sockaddr *addr, socklen_t alen)
setsockopt_txtime(fd);
+ if (cfg_verify_hw_offload)
+ setsockopt_txtimestamping(fd);
+
if (cfg_mark &&
setsockopt(fd, SOL_SOCKET, SO_MARK, &cfg_mark, sizeof(cfg_mark)))
error(1, errno, "setsockopt mark");
@@ -354,6 +406,7 @@ static void do_test_tx(struct sockaddr *addr, socklen_t alen)
start_time_wait();
glob_tstart = gettime_ns(cfg_clockid);
+ glob_tstart_real = gettime_ns(CLOCK_REALTIME);
for (i = 0; i < cfg_num_pkt; i++)
do_send_one(fdt, &cfg_buf[i]);
@@ -446,10 +499,11 @@ static void usage(const char *progname)
" -6 only IPv6\n"
" -c <clock> monotonic or tai (default)\n"
" -D <addr> destination IP address (server)\n"
- " -S <addr> source IP address (client)\n"
+ " -h verify hardware offload (tx)\n"
+ " -m <mark> socket mark\n"
" -r run rx mode\n"
+ " -S <addr> source IP address (client)\n"
" -t <nsec> start time (UTC nanoseconds)\n"
- " -m <mark> socket mark\n"
"\n",
progname);
exit(1);
@@ -461,7 +515,7 @@ static void parse_opts(int argc, char **argv)
int domain = PF_UNSPEC;
int c;
- while ((c = getopt(argc, argv, "46c:S:D:rt:m:")) != -1) {
+ while ((c = getopt(argc, argv, "46c:D:hm:rS:t:")) != -1) {
switch (c) {
case '4':
if (domain != PF_UNSPEC)
@@ -488,21 +542,24 @@ static void parse_opts(int argc, char **argv)
else
error(1, 0, "unknown clock id %s", optarg);
break;
- case 'S':
- saddr = optarg;
- break;
case 'D':
daddr = optarg;
break;
+ case 'h':
+ cfg_verify_hw_offload = true;
+ break;
+ case 'm':
+ cfg_mark = strtol(optarg, NULL, 0);
+ break;
case 'r':
cfg_rx = true;
break;
+ case 'S':
+ saddr = optarg;
+ break;
case 't':
cfg_start_time_ns = strtoll(optarg, NULL, 0);
break;
- case 'm':
- cfg_mark = strtol(optarg, NULL, 0);
- break;
default:
usage(argv[0]);
}
--
2.55.0.795.g602f6c329a-goog
^ permalink raw reply related
* [PATCH net-next 6/7] selftests: drv-net: extend so_txtime with hw offload
From: Willem de Bruijn @ 2026-07-06 13:34 UTC (permalink / raw)
To: netdev; +Cc: davem, kuba, edumazet, pabeni, horms, andrew, Willem de Bruijn
In-Reply-To: <20260706133433.3142805-1-willemdebruijn.kernel@gmail.com>
From: Willem de Bruijn <willemb@google.com>
Add two pacing hardware offload variants
1. one that uses FQ to safely offload when within bounds.
2. one that uses pfifo_fast and thus forwards all packets.
Verify that the packets are paced in hardware with new flag '-h'.
Also move the ip version check to the main test_so_txtime callee,
rather than having to add checks to the new variants.
Also increase test timeout to 2 min. This suite now counts 58 tests,
which each take 2 sec to stabilize when run with KSFT_MACHINE_SLOW.
When increasing the bound, do so with a sizable headroom.
Also increase rcvtimeout significantly to reduce flakiness.
Signed-off-by: Willem de Bruijn <willemb@google.com>
---
tools/testing/selftests/drivers/net/settings | 1 +
.../testing/selftests/drivers/net/so_txtime.c | 2 +-
.../selftests/drivers/net/so_txtime.py | 72 +++++++++++++++++--
3 files changed, 70 insertions(+), 5 deletions(-)
create mode 100644 tools/testing/selftests/drivers/net/settings
diff --git a/tools/testing/selftests/drivers/net/settings b/tools/testing/selftests/drivers/net/settings
new file mode 100644
index 000000000000..b478e684846a
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/settings
@@ -0,0 +1 @@
+timeout=240
diff --git a/tools/testing/selftests/drivers/net/so_txtime.c b/tools/testing/selftests/drivers/net/so_txtime.c
index 5900ca97957c..6e64baa4c60d 100644
--- a/tools/testing/selftests/drivers/net/so_txtime.c
+++ b/tools/testing/selftests/drivers/net/so_txtime.c
@@ -375,7 +375,7 @@ static int setup_tx(struct sockaddr *addr, socklen_t alen)
static int setup_rx(struct sockaddr *addr, socklen_t alen)
{
- struct timeval tv = { .tv_usec = 100 * 1000 };
+ struct timeval tv = { .tv_usec = 600 * 1000 };
int fd;
fd = socket(addr->sa_family, SOCK_DGRAM, 0);
diff --git a/tools/testing/selftests/drivers/net/so_txtime.py b/tools/testing/selftests/drivers/net/so_txtime.py
index adf6c848d6d8..9dbf6067de27 100755
--- a/tools/testing/selftests/drivers/net/so_txtime.py
+++ b/tools/testing/selftests/drivers/net/so_txtime.py
@@ -12,10 +12,13 @@ import time
from lib.py import ksft_exit, ksft_run, ksft_variants
from lib.py import KsftNamedVariant, KsftSkipEx
from lib.py import NetDrvEpEnv, bkg, cmd, defer, tc
+from lib.py import EthtoolFamily, NlError
def test_so_txtime(cfg, clockid, ipver, args_tx, args_rx, expect_success):
"""Main function. Run so_txtime as sender and receiver."""
+ cfg.require_ipver(ipver)
+
slow_machine = os.environ.get('KSFT_MACHINE_SLOW')
if not hasattr(cfg, "bin_remote"):
@@ -38,6 +41,34 @@ def test_so_txtime(cfg, clockid, ipver, args_tx, args_rx, expect_success):
cmd(cmd_tx)
+def _dev_setup_pacing_offload(cfg):
+ """Configure pacing-offload-horizon."""
+ ethnl = EthtoolFamily()
+
+ try:
+ rings = ethnl.rings_get({'header': {'dev-index': cfg.ifindex}})
+ except NlError:
+ raise KsftSkipEx('ring-get not supported by device')
+
+ if 'pacing-offload-horizon' not in rings or \
+ 'pacing-offload-horizon-max' not in rings:
+ raise KsftSkipEx('pacing offload horizon not supported by device')
+
+ if rings['pacing-offload-horizon-max'] < 50_000:
+ raise KsftSkipEx('pacing offload max horizon too small')
+
+ cur_horizon = rings['pacing-offload-horizon']
+ new_horizon = 50_000
+ ethnl.rings_set({
+ 'header': {'dev-index': cfg.ifindex},
+ 'pacing-offload-horizon': new_horizon,
+ })
+ defer(ethnl.rings_set, {
+ 'header': {'dev-index': cfg.ifindex},
+ 'pacing-offload-horizon': cur_horizon
+ })
+
+
def _qdisc_setup(ifname, qdisc, optargs=""):
"""Replace root qdisc. Restore the original after the test.
@@ -56,6 +87,7 @@ def _test_variants_fq():
["one_pkt", "a,10", "a,10"],
["in_order", "a,10,b,20", "a,10,b,20"],
["reverse_order", "a,20,b,10", "b,10,a,20"],
+ ["beyond_hw_horizon", "a,70", "a,70"],
]:
name = f"v{ipver}_{testcase[0]}"
yield KsftNamedVariant(name, ipver, testcase[1], testcase[2])
@@ -64,15 +96,42 @@ def _test_variants_fq():
@ksft_variants(_test_variants_fq())
def test_so_txtime_fq_mono(cfg, ipver, args_tx, args_rx):
"""Run all variants of monotonic (fq) tests."""
- cfg.require_ipver(ipver)
_qdisc_setup(cfg.ifname, "fq")
test_so_txtime(cfg, "mono", ipver, args_tx, args_rx, True)
+@ksft_variants(_test_variants_fq())
+def test_so_txtime_fq_mono_hw(cfg, ipver, args_tx, args_rx):
+ """Run all variants of monotonic fq tests, with offload horizon."""
+ cfg.require_nsim(nsim_test=False)
+
+ _dev_setup_pacing_offload(cfg)
+ try:
+ _qdisc_setup(cfg.ifname, "fq", "offload_horizon 50ms")
+ except Exception as e:
+ raise KsftSkipEx("netdev does not support offload. skipping") from e
+
+ # Expect all tests to use only hw pacing, except beyond_hw_horizon.
+ hw_only = "-h" if args_tx != "a,70" else ""
+ test_so_txtime(cfg, "mono", ipver, f"{hw_only} {args_tx}", args_rx, True)
+
+
+@ksft_variants(_test_variants_fq())
+def test_so_txtime_pfifofast_mono_hw(cfg, ipver, args_tx, args_rx):
+ """Run all variants of monotonic tests, without fq pacing sw backup."""
+ cfg.require_nsim(nsim_test=False)
+
+ _dev_setup_pacing_offload(cfg)
+ _qdisc_setup(cfg.ifname, "pfifo_fast")
+
+ # Expect all tests to pass, except beyond_hw_horizon without sw fallback.
+ expect_pass = False if args_tx == "a,70" else True
+ test_so_txtime(cfg, "mono", ipver, f"-h {args_tx}", args_rx, expect_pass)
+
+
@ksft_variants(_test_variants_fq())
def test_so_txtime_fq_tai(cfg, ipver, args_tx, args_rx):
"""Run all variants of fq tests, but pass CLOCK_TAI to test conversion."""
- cfg.require_ipver(ipver)
_qdisc_setup(cfg.ifname, "fq")
test_so_txtime(cfg, "tai", ipver, args_tx, args_rx, True)
@@ -95,7 +154,6 @@ def _test_variants_etf():
@ksft_variants(_test_variants_etf())
def test_so_txtime_etf(cfg, ipver, args_tx, args_rx, expect_fail):
"""Run all variants of etf tests."""
- cfg.require_ipver(ipver)
try:
_qdisc_setup(cfg.ifname, "etf", "clockid CLOCK_TAI delta 400000")
except Exception as e:
@@ -108,7 +166,13 @@ def main() -> None:
"""Boilerplate ksft main."""
with NetDrvEpEnv(__file__) as cfg:
ksft_run(
- [test_so_txtime_fq_mono, test_so_txtime_fq_tai, test_so_txtime_etf],
+ [
+ test_so_txtime_fq_mono,
+ test_so_txtime_fq_mono_hw,
+ test_so_txtime_pfifofast_mono_hw,
+ test_so_txtime_fq_tai,
+ test_so_txtime_etf,
+ ],
args=(cfg,),
)
ksft_exit()
--
2.55.0.795.g602f6c329a-goog
^ permalink raw reply related
* [PATCH net-next 7/7] net: pktgen: add support for SO_TXTIME
From: Willem de Bruijn @ 2026-07-06 13:34 UTC (permalink / raw)
To: netdev; +Cc: davem, kuba, edumazet, pabeni, horms, andrew, Willem de Bruijn
In-Reply-To: <20260706133433.3142805-1-willemdebruijn.kernel@gmail.com>
From: Willem de Bruijn <willemb@google.com>
Introduce support for setting the SO_TXTIME delivery txtime on
generated packets. This allows testing pacing and scheduling features
in the network stack (e.g., sch_fq, sch_taprio) and drivers.
Add a new flag 'TXTIME' to enable this feature.
Add two new configuration parameters:
- txtime_delay: offset from now in ns
- txtime_clockid: clock to use (monotonic, realtime, tai)
The queue_xmit mode can clear skb->tstamp in-flight, so this must be
used without clone_skb.
Signed-off-by: Willem de Bruijn <willemb@google.com>
---
Sashiko: ignore data races in the control fields. Pktgen requires
superuser privileges, has many such races already, which are benign.
---
net/core/pktgen.c | 85 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 85 insertions(+)
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index 8e185b318288..be4fce895b2c 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -201,6 +201,7 @@
pf(SVID_RND) /* Random SVLAN ID */ \
pf(NODE) /* Node memory alloc*/ \
pf(SHARED) /* Shared SKB */ \
+ pf(TXTIME) /* SO_TXTIME support */ \
#define pf(flag) flag##_SHIFT,
enum pkt_flags {
@@ -291,6 +292,10 @@ struct pktgen_dev {
struct page *page;
u64 delay; /* nano-seconds */
+ /* TXTIME support */
+ u64 txtime_delay; /* transmit time delay in ns */
+ clockid_t txtime_clockid; /* clockid for SO_TXTIME */
+
__u64 count; /* Default No packets to send */
__u64 sofar; /* How many pkts we've sent so far */
__u64 tx_bytes; /* How many bytes we've transmitted */
@@ -666,6 +671,17 @@ static int pktgen_if_show(struct seq_file *seq, void *v)
if (pkt_dev->node >= 0)
seq_printf(seq, " node: %d\n", pkt_dev->node);
+ if (pkt_dev->flags & F_TXTIME) {
+ clockid_t clockid = READ_ONCE(pkt_dev->txtime_clockid);
+
+ seq_printf(seq, " txtime_delay: %llu\n",
+ (unsigned long long)pkt_dev->txtime_delay);
+ seq_printf(seq, " txtime_clockid: %s\n",
+ clockid == CLOCK_MONOTONIC ? "monotonic" :
+ clockid == CLOCK_REALTIME ? "realtime" :
+ clockid == CLOCK_TAI ? "tai" : "unknown");
+ }
+
if (pkt_dev->xmit_mode == M_NETIF_RECEIVE)
seq_puts(seq, " xmit_mode: netif_receive\n");
else if (pkt_dev->xmit_mode == M_QUEUE_XMIT)
@@ -1141,6 +1157,49 @@ static ssize_t pktgen_if_write(struct file *file,
(unsigned long long) pkt_dev->delay);
return count;
}
+ if (!strcmp(name, "txtime_delay")) {
+ max = min(10, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
+ if (len < 0)
+ return len;
+
+ /* in queue_xmit mode fq may clear tstamp, do not reuse skb */
+ if (value > 0 && pkt_dev->clone_skb > 0)
+ return -EINVAL;
+
+ pkt_dev->txtime_delay = (u64)value;
+ sprintf(pg_result, "OK: txtime_delay=%llu",
+ (unsigned long long)pkt_dev->txtime_delay);
+ return count;
+ }
+ if (!strcmp(name, "txtime_clockid")) {
+ char clockstr[32];
+ clockid_t clk;
+
+ memset(clockstr, 0, sizeof(clockstr));
+ max = min(sizeof(clockstr) - 1, count - i);
+ len = strn_len(&user_buffer[i], max);
+ if (len < 0)
+ return len;
+
+ if (copy_from_user(clockstr, &user_buffer[i], len))
+ return -EFAULT;
+
+ if (!strcmp(clockstr, "monotonic")) {
+ clk = CLOCK_MONOTONIC;
+ } else if (!strcmp(clockstr, "realtime")) {
+ clk = CLOCK_REALTIME;
+ } else if (!strcmp(clockstr, "tai")) {
+ clk = CLOCK_TAI;
+ } else {
+ sprintf(pg_result, "ERROR: unknown clockid '%s'", clockstr);
+ return -EINVAL;
+ }
+
+ sprintf(pg_result, "OK: txtime_clockid=%s", clockstr);
+ WRITE_ONCE(pkt_dev->txtime_clockid, clk);
+ return count;
+ }
if (!strcmp(name, "rate")) {
max = min(10, count - i);
len = num_arg(&user_buffer[i], max, &value);
@@ -1238,6 +1297,8 @@ static ssize_t pktgen_if_write(struct file *file,
if (value > 0 && (pkt_dev->n_imix_entries > 0 ||
!(pkt_dev->flags & F_SHARED)))
return -EINVAL;
+ if (value > 0 && pkt_dev->txtime_delay)
+ return -EINVAL;
pkt_dev->clone_skb = value;
@@ -2321,6 +2382,21 @@ static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
}
+static ktime_t ktime_get_clock(clockid_t clockid)
+{
+ switch (clockid) {
+ case CLOCK_REALTIME:
+ return ktime_get_real();
+ case CLOCK_MONOTONIC:
+ return ktime_get();
+ case CLOCK_TAI:
+ return ktime_get_clocktai();
+ default:
+ WARN_ON_ONCE(1);
+ return ktime_get();
+ }
+}
+
static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
{
ktime_t start_time, end_time;
@@ -3557,6 +3633,14 @@ static void pktgen_xmit(struct pktgen_dev *pkt_dev)
}
pkt_dev->last_pkt_size = pkt_dev->skb->len;
pkt_dev->clone_count = 0; /* reset counter */
+
+ if (pkt_dev->flags & F_TXTIME && pkt_dev->txtime_delay) {
+ clockid_t clk = READ_ONCE(pkt_dev->txtime_clockid);
+ ktime_t txtime = ktime_add_ns(ktime_get_clock(clk),
+ pkt_dev->txtime_delay);
+
+ skb_set_delivery_type_by_clockid(pkt_dev->skb, txtime, clk);
+ }
}
if (pkt_dev->delay && pkt_dev->last_ok)
@@ -3869,6 +3953,7 @@ static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
pkt_dev->burst = 1;
pkt_dev->node = NUMA_NO_NODE;
pkt_dev->flags = F_SHARED; /* SKB shared by default */
+ pkt_dev->txtime_clockid = CLOCK_MONOTONIC;
err = pktgen_setup_dev(t->net, pkt_dev, ifname);
if (err)
--
2.55.0.795.g602f6c329a-goog
^ permalink raw reply related
* Re: [PATCH net-next v9 6/6] riscv: dts: eswin: eic7700-hifive-premier-p550: enable Ethernet controller
From: Paolo Abeni @ 2026-07-06 13:35 UTC (permalink / raw)
To: 李志, Andrew Lunn
Cc: sashiko-reviews, conor+dt, robh, devicetree, Min Lin,
netdev@vger.kernel.org
In-Reply-To: <f21ffca.a15e.19f25abaea6.Coremail.lizhi2@eswincomputing.com>
On 7/3/26 3:50 AM, 李志 wrote:
>> -----Original Messages-----
>> From: "Andrew Lunn" <andrew@lunn.ch>
>> Send time:Thursday, 02/07/2026 21:22:34
>> To: 李志 <lizhi2@eswincomputing.com>
>> Cc: sashiko-reviews@lists.linux.dev, conor+dt@kernel.org, robh@kernel.org, devicetree@vger.kernel.org, "Min Lin" <linmin@eswincomputing.com>
>> Subject: Re: Re: [PATCH net-next v9 6/6] riscv: dts: eswin: eic7700-hifive-premier-p550: enable Ethernet controller
>>
>>> Hi Andrew,
>>>
>>> One question before I prepare the next revision.
>>>
>>> As discussed previously, the DTS patch was included only to provide the overall
>>> Ethernet design context during the review of the binding and driver patches:
>>>
>>> https://lore.kernel.org/lkml/64bf6b40-b947-4ffa-8d48-4d6341931327@lunn.ch/
>>>
>>> For the next revision, would it be acceptable to drop the DTS patch from this
>>> series and post only the binding and driver patches? The complete DTS
>>> enablement is planned to be submitted later as a separate series after the
>>> binding and driver have been merged.
>>
>> What normally happens is that I give an Acked-by: or a Reviewed-by:
>> for the DT patch, and you submit it for merging via the DT Maintainer.
>> Everything then meets up in linux-next.
>>
>> Why do you need to do this later? Why not now?
>>
>
> There is an another seperate DT patch series
> [https://lore.kernel.org/all/20260615122016.1110206-1-pinkesh.vaghela@einfochips.com/]
> which is under review.
> It also introduces DT nodes for reset, clock, pinctrl, HSP power domain.
>
> Therefore, our planned steps are as follows:
> 1. In the next net-next v10 patch series, drop the DTS patches, and submit only
> the bindings and driver.
> 2. Wait for Pinkesh’s DT patch series to be merged.
> 3. Once the HSPCRG patch series
> [https://lore.kernel.org/all/20260605060730.1605-1-dongxuyang@eswincomputing.com/]
> is merged, submit a new DT patch series to extend ESWIN EIC7700 SoC support
> for all HSP modules—including USB, eMMC, SD, and Ethernet, since they are all
> under the HSP bus node eventhough ethernet doese not depend on HSPCRG patch.
In v10 please include some actual description of the series, beyond the
changelog.
Thanks,
Paolo
^ permalink raw reply
* [PATCH net-next 3/7] idpf: support pacing offload
From: Willem de Bruijn @ 2026-07-06 13:34 UTC (permalink / raw)
To: netdev
Cc: davem, kuba, edumazet, pabeni, horms, andrew, Willem de Bruijn,
Tony Nguyen, Joshua A Hay
In-Reply-To: <20260706133433.3142805-1-willemdebruijn.kernel@gmail.com>
From: Willem de Bruijn <willemb@google.com>
If skb->tstamp is in the future, program this future delivery txtime
in the transmit descriptor.
TCP pacing offload is only offloaded if SK_PACING_FQ is negotiated and
the FQ offload_horizon is configured.
But device support for pacing offload must be more robust. It can also
be reached through SO_TXTIME.
Bound check txtime. Only packets with timestamp between now and the
horizon (max_pacing_offload_horizon) are offloaded.
Support only in splitq mode, where tx and tx completion queues are
separate and so completions can be returned out of order.
Assume that the NIC clock is PTP synchronized to CLOCK_TAI. This
can later be refined, e.g., to a custom CLOCK_AUX.
Disable if in netpoll. It does not need the feature, and the ktime
functions are not safe to call in this context.
Cc: Tony Nguyen <anthony.l.nguyen@intel.com>
Cc: Joshua A Hay <joshua.a.hay@intel.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
---
Sashiko, ignore pre-existing issues.
Sashiko, ignore that idpf_tx_splitq_set_txtime may have a benign race
by calling ktime_mono_to_any twice to get TAI to REALTIME offset.
---
.../net/ethernet/intel/idpf/idpf_ethtool.c | 3 +-
drivers/net/ethernet/intel/idpf/idpf_lib.c | 5 ++
drivers/net/ethernet/intel/idpf/idpf_txrx.c | 63 ++++++++++++++++++-
drivers/net/ethernet/intel/idpf/idpf_txrx.h | 2 +
4 files changed, 71 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/intel/idpf/idpf_ethtool.c b/drivers/net/ethernet/intel/idpf/idpf_ethtool.c
index bb99d9e7c65d..5ddf347927dc 100644
--- a/drivers/net/ethernet/intel/idpf/idpf_ethtool.c
+++ b/drivers/net/ethernet/intel/idpf/idpf_ethtool.c
@@ -1801,7 +1801,8 @@ static void idpf_get_ts_stats(struct net_device *netdev,
static const struct ethtool_ops idpf_ethtool_ops = {
.supported_coalesce_params = ETHTOOL_COALESCE_USECS |
ETHTOOL_COALESCE_USE_ADAPTIVE,
- .supported_ring_params = ETHTOOL_RING_USE_TCP_DATA_SPLIT,
+ .supported_ring_params = ETHTOOL_RING_USE_TCP_DATA_SPLIT |
+ ETHTOOL_RING_USE_PACING_OFFLOAD_HORIZON,
.get_msglevel = idpf_get_msglevel,
.set_msglevel = idpf_set_msglevel,
.get_link = ethtool_op_get_link,
diff --git a/drivers/net/ethernet/intel/idpf/idpf_lib.c b/drivers/net/ethernet/intel/idpf/idpf_lib.c
index cf966fe6c759..de4170c2aa3b 100644
--- a/drivers/net/ethernet/intel/idpf/idpf_lib.c
+++ b/drivers/net/ethernet/intel/idpf/idpf_lib.c
@@ -888,6 +888,11 @@ static int idpf_cfg_netdev(struct idpf_vport *vport)
netdev->min_mtu = ETH_MIN_MTU;
netdev->max_mtu = vport->max_mtu;
+ if (idpf_is_queue_model_split(vport->dflt_qv_rsrc.txq_model) &&
+ !idpf_is_cap_ena(adapter, IDPF_OTHER_CAPS,
+ VIRTCHNL2_CAP_SPLITQ_QSCHED))
+ netdev->max_pacing_offload_horizon = 128000;
+
dflt_features = NETIF_F_SG |
NETIF_F_HIGHDMA;
diff --git a/drivers/net/ethernet/intel/idpf/idpf_txrx.c b/drivers/net/ethernet/intel/idpf/idpf_txrx.c
index 7f9056404f64..3de0c4ec54f6 100644
--- a/drivers/net/ethernet/intel/idpf/idpf_txrx.c
+++ b/drivers/net/ethernet/intel/idpf/idpf_txrx.c
@@ -1,6 +1,8 @@
// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (C) 2023 Intel Corporation */
+#include <linux/netpoll.h>
+
#include "idpf.h"
#include "idpf_ptp.h"
#include "idpf_virtchnl.h"
@@ -2408,9 +2410,13 @@ void idpf_tx_splitq_build_flow_desc(union idpf_tx_flex_desc *desc,
struct idpf_tx_splitq_params *params,
u16 td_cmd, u16 size)
{
- *(u32 *)&desc->flow.qw1.cmd_dtype = (u8)(params->dtype | td_cmd);
+ *(__le32 *)&desc->flow.qw1.cmd_dtype = cpu_to_le32((u8)(params->dtype | td_cmd));
desc->flow.qw1.rxr_bufsize = cpu_to_le16((u16)size);
desc->flow.qw1.compl_tag = cpu_to_le16(params->compl_tag);
+
+ desc->flow.qw1.ts[0] = params->offload.desc_ts[0];
+ desc->flow.qw1.ts[1] = params->offload.desc_ts[1];
+ desc->flow.qw1.ts[2] = params->offload.desc_ts[2];
}
/**
@@ -3011,6 +3017,57 @@ static bool idpf_tx_splitq_need_re(struct idpf_tx_queue *tx_q)
return gap >= IDPF_TX_SPLITQ_RE_MIN_GAP;
}
+static void idpf_tx_splitq_set_txtime(const struct idpf_tx_queue *tx_q,
+ const struct sk_buff *skb,
+ struct idpf_tx_splitq_params *tx_params)
+{
+ const int ts_gran_pow2 = 9;
+ u64 ts, now;
+
+ /* Skip if netpoll: not needed and not safe to call ktime helpers */
+ if (netpoll_tx_running(skb->dev))
+ return;
+
+ switch (skb->tstamp_type) {
+ case SKB_CLOCK_REALTIME:
+ ts = ktime_to_ns(ktime_add(skb->tstamp,
+ ktime_mono_to_any(0, TK_OFFS_TAI) -
+ ktime_mono_to_any(0, TK_OFFS_REAL)));
+ break;
+ case SKB_CLOCK_MONOTONIC:
+ ts = ktime_to_ns(ktime_mono_to_any(skb->tstamp, TK_OFFS_TAI));
+ break;
+ case SKB_CLOCK_TAI:
+ ts = ktime_to_ns(skb->tstamp);
+ break;
+ default:
+ WARN_ON_ONCE(1);
+ return;
+ }
+
+ now = ktime_get_clocktai_ns();
+ if (ts < now)
+ return;
+
+ /* beyond offload horizon? set overflow bit only */
+ if (ts > now + ((u64)skb->dev->pacing_offload_horizon * NSEC_PER_USEC)) {
+ tx_params->offload.desc_ts[2] = 1 << 7;
+ return;
+ }
+
+ ts >>= ts_gran_pow2;
+
+ tx_params->offload.desc_ts[0] = ts & 0xff;
+ tx_params->offload.desc_ts[1] = (ts >> 8) & 0xff;
+ tx_params->offload.desc_ts[2] = ((ts >> 16) & 0x7f);
+
+ /* 0 is valid 24b timestamp, but also means field unset.
+ * Add 512 ns (ts_gran_pow2) to avoid this case
+ */
+ if ((ts & 0x7fffff) == 0)
+ tx_params->offload.desc_ts[0] = 1;
+}
+
/**
* idpf_tx_splitq_frame - Sends buffer on Tx ring using flex descriptors
* @skb: send buffer
@@ -3097,6 +3154,10 @@ static netdev_tx_t idpf_tx_splitq_frame(struct sk_buff *skb,
tx_params.dtype = IDPF_TX_DESC_DTYPE_FLEX_FLOW_SCHE;
tx_params.eop_cmd = IDPF_TXD_FLEX_FLOW_CMD_EOP;
+
+ if (skb->tstamp && skb->dev->pacing_offload_horizon)
+ idpf_tx_splitq_set_txtime(tx_q, skb, &tx_params);
+
/* Set the RE bit to periodically "clean" the descriptor ring.
* MIN_GAP is set to MIN_RING size to ensure it will be set at
* least once each time around the ring.
diff --git a/drivers/net/ethernet/intel/idpf/idpf_txrx.h b/drivers/net/ethernet/intel/idpf/idpf_txrx.h
index 4be5b3b6d3ed..865408b57b0d 100644
--- a/drivers/net/ethernet/intel/idpf/idpf_txrx.h
+++ b/drivers/net/ethernet/intel/idpf/idpf_txrx.h
@@ -161,6 +161,7 @@ union idpf_tx_flex_desc {
* @tso_segs: Number of segments to be sent
* @tso_hdr_len: Length of headers to be duplicated
* @td_cmd: Command field to be inserted into descriptor
+ * @desc_ts: Flow scheduling offload timestamp
*/
struct idpf_tx_offload_params {
u32 tx_flags;
@@ -174,6 +175,7 @@ struct idpf_tx_offload_params {
u16 tso_hdr_len;
u16 td_cmd;
+ u8 desc_ts[3];
};
/**
--
2.55.0.795.g602f6c329a-goog
^ permalink raw reply related
* [PATCH net-next v2 0/5] net: Move system_long_wq to system_dfl_long_wq
From: Marco Crivellari @ 2026-07-06 13:40 UTC (permalink / raw)
To: linux-kernel, netdev
Cc: Tejun Heo, Lai Jiangshan, Frederic Weisbecker,
Sebastian Andrzej Siewior, Marco Crivellari, Michal Hocko,
Andrew Lunn, David S . Miller, Eric Dumazet, Jakub Kicinski,
Paolo Abeni, Christophe Leroy (CS GROUP), Ethan Nelson-Moore,
Haren Myneni, Madhavan Srinivasan, MD Danish Anwar,
Michael Ellerman, Mika Westerberg, Nicholas Piggin, Nick Child,
Petko Manolov, Richard Cheng, Rick Lindsley, Roger Quadros,
Yehezkel Bernat
Hello,
Currently the code uses the per-cpu workqueue system_long_wq to schedule
long running works.
Unbound works could benefit from scheduler task placement, to optimize
performance and power consumption. Another good reason to have this unbound,
is the "queue_delayed_work()" function, used to enqueue the work item.
More details on this will follow in the next section.
Recently, a new unbound workqueue specific for long running work has been
added:
c116737e972e ("workqueue: Add system_dfl_long_wq for long unbound works")
~~~ Details about queue_delayed_work ~~~
system_long_wq is a per-cpu workqueue and it is used as a parameter of
queue_delayed_work(). This function schedule an item that it will later
be enqueued (once the timer will fire). __queue_delayed_work() does the job
receiving as "cpu" WORK_CPU_UNBOUND:
if (housekeeping_enabled(HK_TYPE_TIMER)) {
// [....]
} else {
if (likely(cpu == WORK_CPU_UNBOUND))
add_timer_global(timer);
else
add_timer_on(timer, cpu);
}
The timer is global, so can fire everywhere, and the work item will be
enqueued where the timer fired.
Since the workqueue work doesn't rely on per-cpu variables, there is no
obvious reason that justify the use of a per-cpu workqueue. So change the
workqueue with the new system_dfl_long_wq, so that the used workqueue is
now unbound and can benefit from scheduler task placement.
Thanks!
---
Changes in v2:
- rebased on v7.2-rc2
- dropped the RFC prefix, kept Ack and review tags
Link to v1: https://lore.kernel.org/all/20260511092846.120141-1-marco.crivellari@suse.com/
Marco Crivellari (5):
ibmvnic: Move long delayed work on system_dfl_long_wq
net: ti: icssg-stats: Move long delayed work on system_dfl_long_wq
net: thunderbolt: Move long delayed work on system_dfl_long_wq
net: usb: pegasus: Move long delayed work on system_dfl_long_wq
net: usb: r8152: Move long delayed work on system_dfl_long_wq
drivers/net/ethernet/ibm/ibmvnic.c | 4 ++--
drivers/net/ethernet/ti/icssg/icssg_stats.c | 2 +-
drivers/net/thunderbolt/main.c | 7 ++++---
drivers/net/usb/pegasus.c | 9 +++++----
drivers/net/usb/r8152.c | 7 ++++---
5 files changed, 16 insertions(+), 13 deletions(-)
--
2.54.0
^ permalink raw reply
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