From nobody Sun Feb 8 16:49:49 2026 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 8C295281532; Thu, 18 Dec 2025 10:15:24 +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=1766052924; cv=none; b=VYjKKL1IQqoA4wwdd8SDXHOq7vs7eLJoWEPiGSY9B2ZcyA4EwVtLike6suLOtrUJWJVMwLMFvy54zmIHYtjNu6J2Pdb6Nr9pK+WsTj2bhhXnXBVJbed8FvveQ53bvboODrX7Ne8IQJ7MVz3jBsSgtX7ahe1eT10snCxayhRrVzA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766052924; c=relaxed/simple; bh=Bi06CETWErknBAzyqJH7s43TP+l23Kbig0ziz2gkwNU=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=bIFMbMJU9Mm0WIiWbDG/TAU/qV/4CGNhLyQzxGFYmnMSRS6nL56QiWMtTenLTeHmcSENTpdOlmzbZX/9cm1Hy/ChJTK14VANxWCSvHEPcTu0SJPOEScy2Qvc1YuiCPAWyGZyvMwx7a4MbrUQ7oOEoZS3UrRWLxLXunNVEx1Y/DQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=QB+UdsyI; 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="QB+UdsyI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D8277C116C6; Thu, 18 Dec 2025 10:15:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1766052924; bh=Bi06CETWErknBAzyqJH7s43TP+l23Kbig0ziz2gkwNU=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=QB+UdsyIWZOBLCFUBrvizDmKa5ET0ysK+9tr1s0TINduJaM24v9JNd30p05Ih1cIR 93AjPtXllVB4MfHolIfqz4asfZXcClFuPr6+HujwlDuxPX4MrWPiGmAyCSSoybzbuZ iaCo94FEMxrgCCpQfCI0Uxe8ltzb2yTjNfZer4OqdEuZcJqlVCObW34FO/YpJtbQO/ wKOZs9afgWx+Rmi7q2HfRfnBwct+whVGPVLHhe2RkY3hbbrgGrszH3pkK8P9W7grvh n3DilzA+G72OmvCuBihXhVDNB3rMOoDXrWlyoqgaDStzIT3Nms+jflJTSjdw8+IXa0 +TGNwszGlPDzg== From: Lorenzo Pieralisi Date: Thu, 18 Dec 2025 11:14:30 +0100 Subject: [PATCH v2 4/7] PCI/MSI: Make the pci_msi_map_rid_ctlr_node() interface firmware agnostic Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251218-gicv5-host-acpi-v2-4-eec76cd1d40b@kernel.org> References: <20251218-gicv5-host-acpi-v2-0-eec76cd1d40b@kernel.org> In-Reply-To: <20251218-gicv5-host-acpi-v2-0-eec76cd1d40b@kernel.org> To: "Rafael J. Wysocki" , Len Brown , Robert Moore , Thomas Gleixner , Hanjun Guo , Sudeep Holla , Marc Zyngier , Bjorn Helgaas Cc: linux-acpi@vger.kernel.org, acpica-devel@lists.linux.dev, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pci@vger.kernel.org, Lorenzo Pieralisi X-Mailer: b4 0.14.3 To support booting with OF and ACPI seamlessly, GIC ITS parent code requires the PCI/MSI irqdomain layer to implement a function to retrieve an MSI controller fwnode and map an RID in a firmware agnostic way (ie pci_msi_map_rid_ctlr_node()). Convert pci_msi_map_rid_ctlr_node() to an OF agnostic interface (fwnode_handle based) and update the GIC ITS MSI parent code to reflect the pci_msi_map_rid_ctlr_node() change. Signed-off-by: Lorenzo Pieralisi Cc: Thomas Gleixner Cc: Bjorn Helgaas Cc: Marc Zyngier Acked-by: Bjorn Helgaas Reviewed-by: Jonathan Cameron --- drivers/irqchip/irq-gic-its-msi-parent.c | 8 ++++---- drivers/pci/msi/irqdomain.c | 22 +++++++++++++++++----- include/linux/msi.h | 3 ++- 3 files changed, 23 insertions(+), 10 deletions(-) diff --git a/drivers/irqchip/irq-gic-its-msi-parent.c b/drivers/irqchip/irq= -gic-its-msi-parent.c index 12f45228c867..4d1ad1ee005d 100644 --- a/drivers/irqchip/irq-gic-its-msi-parent.c +++ b/drivers/irqchip/irq-gic-its-msi-parent.c @@ -104,7 +104,7 @@ static int its_pci_msi_prepare(struct irq_domain *domai= n, struct device *dev, static int its_v5_pci_msi_prepare(struct irq_domain *domain, struct device= *dev, int nvec, msi_alloc_info_t *info) { - struct device_node *msi_node =3D NULL; + struct fwnode_handle *msi_node =3D NULL; struct msi_domain_info *msi_info; struct pci_dev *pdev; phys_addr_t pa; @@ -116,15 +116,15 @@ static int its_v5_pci_msi_prepare(struct irq_domain *= domain, struct device *dev, =20 pdev =3D to_pci_dev(dev); =20 - rid =3D pci_msi_map_rid_ctlr_node(pdev, &msi_node); + rid =3D pci_msi_map_rid_ctlr_node(domain->parent, pdev, &msi_node); if (!msi_node) return -ENODEV; =20 - ret =3D its_translate_frame_address(msi_node, &pa); + ret =3D its_translate_frame_address(to_of_node(msi_node), &pa); if (ret) return -ENODEV; =20 - of_node_put(msi_node); + fwnode_handle_put(msi_node); =20 /* ITS specific DeviceID */ info->scratchpad[0].ul =3D rid; diff --git a/drivers/pci/msi/irqdomain.c b/drivers/pci/msi/irqdomain.c index a329060287b5..3136341e802c 100644 --- a/drivers/pci/msi/irqdomain.c +++ b/drivers/pci/msi/irqdomain.c @@ -376,23 +376,35 @@ u32 pci_msi_domain_get_msi_rid(struct irq_domain *dom= ain, struct pci_dev *pdev) } =20 /** - * pci_msi_map_rid_ctlr_node - Get the MSI controller node and MSI request= er id (RID) + * pci_msi_map_rid_ctlr_node - Get the MSI controller fwnode_handle and MS= I requester id (RID) + * @domain: The interrupt domain * @pdev: The PCI device - * @node: Pointer to store the MSI controller device node + * @node: Pointer to store the MSI controller fwnode_handle * - * Use the firmware data to find the MSI controller node for @pdev. + * Use the firmware data to find the MSI controller fwnode_handle for @pde= v. * If found map the RID and initialize @node with it. @node value must * be set to NULL on entry. * * Returns: The RID. */ -u32 pci_msi_map_rid_ctlr_node(struct pci_dev *pdev, struct device_node **n= ode) +u32 pci_msi_map_rid_ctlr_node(struct irq_domain *domain, struct pci_dev *p= dev, + struct fwnode_handle **node) { + struct device_node *of_node; u32 rid =3D pci_dev_id(pdev); =20 pci_for_each_dma_alias(pdev, get_msi_id_cb, &rid); =20 - return of_msi_xlate(&pdev->dev, node, rid); + of_node =3D irq_domain_get_of_node(domain); + if (of_node) { + struct device_node *msi_ctlr_node =3D NULL; + + rid =3D of_msi_xlate(&pdev->dev, &msi_ctlr_node, rid); + if (msi_ctlr_node) + *node =3D of_fwnode_handle(msi_ctlr_node); + } + + return rid; } =20 /** diff --git a/include/linux/msi.h b/include/linux/msi.h index 8003e3218c46..8ddb05d5c96a 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -702,7 +702,8 @@ void __pci_write_msi_msg(struct msi_desc *entry, struct= msi_msg *msg); void pci_msi_mask_irq(struct irq_data *data); void pci_msi_unmask_irq(struct irq_data *data); u32 pci_msi_domain_get_msi_rid(struct irq_domain *domain, struct pci_dev *= pdev); -u32 pci_msi_map_rid_ctlr_node(struct pci_dev *pdev, struct device_node **n= ode); +u32 pci_msi_map_rid_ctlr_node(struct irq_domain *domain, struct pci_dev *p= dev, + struct fwnode_handle **node); struct irq_domain *pci_msi_get_device_domain(struct pci_dev *pdev); void pci_msix_prepare_desc(struct irq_domain *domain, msi_alloc_info_t *ar= g, struct msi_desc *desc); --=20 2.50.1