From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9C18937AA79; Fri, 23 Jan 2026 10:10:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769163008; cv=none; b=k1crptagsX19J3fS3cRuYqzvk94tW/nJ78mbcdRv3mp9XpTGOCFcOuQ13wMXttKcbhTtcc4kAzbm9kCTdgdGnPu8/85cH1BAb9X8oggcQmipSJ0cHild4hsjJqY+UYquojbgod2oal5p/pbKEReRgZaIU+2a+TqBXbVccj6fhmA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769163008; c=relaxed/simple; bh=4V6Haqfpl1oHjKfTmAHLAt2Iakjd6EWBWDDq/P32s3s=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=Qe9JD5PBG8f8py4JMwE9JjgnIi/mpqg3wxK0XhVly0qE1cThPZ5038uSgGXkkFkqkkW9xrXbYSRVP4cm3jMlOiyuyPypQGlJ4ZROftHS3UMGaU4LXDbh8AaS30TwM/N7sKl+RgVnYJj81qOFWmtSyvrkSRl/RdNBUj+hyXDiuvc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JSw8rax6; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="JSw8rax6" Received: by smtp.kernel.org (Postfix) with ESMTPS id 216EEC4CEF1; Fri, 23 Jan 2026 10:10:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1769163008; bh=4V6Haqfpl1oHjKfTmAHLAt2Iakjd6EWBWDDq/P32s3s=; h=From:Subject:Date:To:Cc:Reply-To:From; b=JSw8rax6vV/GNswZB1IGigKzSxFmHfOEnhEcdIWLnUKplPfKZWYGOrIK/nP/zY1nu Dsh2EW3EBTxfvnjDfv8T++UrKWzTLdw6jztp0xRb/IrneSUWjbBHEmxR3VgL21GLg6 1vC6k1nX0m8vwBo/frkc5LRzeqyCAloLo/c2SpezOtbJxIq5VPtIKB5dYItUKForKU QCL1MKPr/wocn4OrBiBa0/2J4BsqcBH9fUn3iWYOA9AEFesev182lsHKQ6J1bp1fPT ag9nC9O54InS1fofSwmKP88Ytg63UTB4UhMYaqyux6/fVfZ8oYeNc4g6lWtEhC8kJJ /IOUQl+ldP5QQ== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 09573D72368; Fri, 23 Jan 2026 10:10:08 +0000 (UTC) From: Jan Petrous via B4 Relay Subject: [PATCH v3 0/4] Support multi-channel IRQs in stmmac platform drivers Date: Fri, 23 Jan 2026 11:09:53 +0100 Message-Id: <20260123-dwmac_multi_irq-v3-0-cc53f2be8961@oss.nxp.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAPFIc2kC/2XNQQ6CMBCF4auYri1pByjgynsYQ6AtMolQbLFiC He3EF0Ylv9L5puZOG1RO3I6zMRqjw5NHyI+Hohsq/6mKarQBBikHFhB1aurZNk97yOWaB+0UHk jWCJASk7C1WB1g9MmXq6hW3Sjse/tgefr+rV4srM8p4zGIhVQ1UwXTXY2zkX9NETSdGTVPPwEw QKxF2AV6hwKiJliGf8XlmX5ABHPkCHyAAAA To: Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Maxime Coquelin , Alexandre Torgue , Chester Lin , Matthias Brugger , Ghennadi Procopciuc , NXP S32 Linux Team , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, devicetree@vger.kernel.org, "Jan Petrous (OSS)" X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1769163006; l=2640; i=jan.petrous@oss.nxp.com; s=20240922; h=from:subject:message-id; bh=4V6Haqfpl1oHjKfTmAHLAt2Iakjd6EWBWDDq/P32s3s=; b=6GtSPTu1ZoE6qF1cAZ/hQcbcMRfciS5B9dcTQYRQTPfgayoFyXPE1LOdUxezBswWMhuo+Q4q9 Z3y4v4510vLA9+LLm1llVzGT9381vjVMBUhLcQmEfvFcjnNGEkR6Vjk X-Developer-Key: i=jan.petrous@oss.nxp.com; a=ed25519; pk=Ke3wwK7rb2Me9UQRf6vR8AsfJZfhTyoDaxkUCqmSWYY= X-Endpoint-Received: by B4 Relay for jan.petrous@oss.nxp.com/20240922 with auth_id=217 X-Original-From: "Jan Petrous (OSS)" Reply-To: jan.petrous@oss.nxp.com The stmmac core supports two interrupt modes, controlled by the flag STMMAC_FLAG_MULTI_MSI_EN: - When the flag is set, the driver uses multi-channel IRQ mode (Multi-IRQ). - Otherwise, a single IRQ line is requested (aka MAC-IRQ): static int stmmac_request_irq(struct net_device *dev) { /* Request the IRQ lines */ if (priv->plat->flags & STMMAC_FLAG_MULTI_MSI_EN) ret = stmmac_request_irq_multi_msi(dev); else ret = stmmac_request_irq_single(dev); } At present, only PCI drivers (Intel and Loongson) make use of the Multi-IRQ mode. This concept can be extended to DT-based embedded glue drivers (dwmac-xxx.c). This series adds support for reading per-channel IRQs from the DT node and reuses the existing STMMAC_FLAG_MULTI_MSI_EN flag to enable multi-IRQ operation in platform drivers. The final decision if Multi-IRQ gets enabled remains on glue driver to allow implementing any reguirements/limitions the focused platform needs. NXP S32G2/S32G3/S32R SoCs integrate the DWMAC IP with multi-channel interrupt support. The dwmac-s32.c driver change is provided as an example of enabling multi-IRQ mode for non-PCI drivers. Signed-off-by: Jan Petrous (OSS) --- Changes in v3: - removed RFC prefix - rebased on v6.19-rc6 - fixed forgotten extra line setting to Multi-IRQ unconditionally - fixed yaml - Link to v2: https://lore.kernel.org/r/20260121-dwmac_multi_irq-v2-0-3b829230d071@oss.nxp.com Changes in v2: - Fixed incorrect buffer len for 'rx-queue-%d' property check - Added backward compatibility to not break old settings - Fixed DT example in yaml - Link to v1: https://lore.kernel.org/r/20251214-dwmac_multi_irq-v1-0-36562ab0e9f7@oss.nxp.com --- Jan Petrous (OSS) (4): net: stmmac: platform: read channels irq dt-bindings: net: nxp,s32-dwmac: Declare per-queue interrupts arm64: dts: s32: set Ethernet channel irqs stmmac: s32: enable support for Multi-IRQ mode .../devicetree/bindings/net/nxp,s32-dwmac.yaml | 42 +++++++++++++++++++--- arch/arm64/boot/dts/freescale/s32g2.dtsi | 26 ++++++++++++-- arch/arm64/boot/dts/freescale/s32g3.dtsi | 26 ++++++++++++-- drivers/net/ethernet/stmicro/stmmac/dwmac-s32.c | 12 ++++++- .../net/ethernet/stmicro/stmmac/stmmac_platform.c | 38 +++++++++++++++++++- 5 files changed, 131 insertions(+), 13 deletions(-) --- base-commit: 24d479d26b25bce5faea3ddd9fa8f3a6c3129ea7 change-id: 20251209-dwmac_multi_irq-9d8f60462cc1 Best regards, -- Jan Petrous (OSS)