From nobody Thu Sep 18 14:13:55 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5AA15C4321E for ; Mon, 5 Dec 2022 21:42:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234008AbiLEVmf (ORCPT ); Mon, 5 Dec 2022 16:42:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40906 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233785AbiLEVlx (ORCPT ); Mon, 5 Dec 2022 16:41:53 -0500 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 26D1E2C65D; Mon, 5 Dec 2022 13:41:52 -0800 (PST) Date: Mon, 05 Dec 2022 21:41:47 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1670276507; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=RkvNfJ57lpw3AUe1CmX6D4bMIWUO3dO7szKMEbwpQg4=; b=lFtylxneSIEJnyazFEZrOv9Zrsro+1dQRWXRgPQl8w8Jyc0XcwjWTuxcwUrZHz2ogqWSDa jKt85PsigYCibcDMGb3QLn37kHDpR1nar3PoklVVJD434hOf6AAlsY7VzxpW8Emq6la5T6 9TGFML1LFcWLCydhTfhfx97JAuOyo2ZsMjIRIHbN6Int69SBijM/rhv9Dg6FHAAabJ+czo Yr8OKxGNPT/X7evSUWHuAKAUSHzTrL8fsLzqsbXyOn66bP/Aq6xhJV5+ofz/AJTq4vsO70 Xd+DCwIPoG8Lo3VHx5x0X41avHo9nmHw2CXy17nFNuciKqac9rInQwdpALcHmw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1670276507; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=RkvNfJ57lpw3AUe1CmX6D4bMIWUO3dO7szKMEbwpQg4=; b=F2/1RzWZVe25DKfWi7qNmXT56eJfLi2l73RMw+BQz8dR5TyVrYsWZtPTIaZy1lcrIUPEEf DJJ8r3ZFLyrIPHDA== From: "tip-bot2 for Thomas Gleixner" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: irq/core] PCI/MSI: Provide prepare_desc() MSI domain op Cc: Thomas Gleixner , Jason Gunthorpe , Kevin Tian , Bjorn Helgaas , Marc Zyngier , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20221124232326.673658806@linutronix.de> References: <20221124232326.673658806@linutronix.de> MIME-Version: 1.0 Message-ID: <167027650761.4906.6794069945665694728.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following commit has been merged into the irq/core branch of tip: Commit-ID: 73bd063ca03493f44e0700cc08824093da9741bc Gitweb: https://git.kernel.org/tip/73bd063ca03493f44e0700cc08824093d= a9741bc Author: Thomas Gleixner AuthorDate: Fri, 25 Nov 2022 00:26:23 +01:00 Committer: Thomas Gleixner CommitterDate: Mon, 05 Dec 2022 22:22:34 +01:00 PCI/MSI: Provide prepare_desc() MSI domain op The setup of MSI descriptors for PCI/MSI-X interrupts depends partially on the MSI index for which the descriptor is initialized. Dynamic MSI-X vector allocation post MSI-X enablement allows to allocate vectors at a given index or at any free index in the available table range. The latter requires that the descriptor is initialized after the MSI core has chosen an index. Implement the prepare_desc() op in the PCI/MSI-X specific msi_domain_ops which is invoked before the core interrupt descriptor and the associated Linux interrupt number is allocated. That callback is also provided for the upcoming PCI/IMS implementations so the implementation specific interrupt domain can do their domain specific initialization of the MSI descriptors. Signed-off-by: Thomas Gleixner Reviewed-by: Jason Gunthorpe Reviewed-by: Kevin Tian Acked-by: Bjorn Helgaas Acked-by: Marc Zyngier Link: https://lore.kernel.org/r/20221124232326.673658806@linutronix.de --- drivers/pci/msi/irqdomain.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/pci/msi/irqdomain.c b/drivers/pci/msi/irqdomain.c index 4736403..8afaef1 100644 --- a/drivers/pci/msi/irqdomain.c +++ b/drivers/pci/msi/irqdomain.c @@ -202,6 +202,14 @@ static void pci_irq_unmask_msix(struct irq_data *data) pci_msix_unmask(irq_data_get_msi_desc(data)); } =20 +static void pci_msix_prepare_desc(struct irq_domain *domain, msi_alloc_inf= o_t *arg, + struct msi_desc *desc) +{ + /* Don't fiddle with preallocated MSI descriptors */ + if (!desc->pci.mask_base) + msix_prepare_msi_desc(to_pci_dev(desc->dev), desc); +} + static const struct msi_domain_template pci_msix_template =3D { .chip =3D { .name =3D "PCI-MSIX", @@ -212,6 +220,7 @@ static const struct msi_domain_template pci_msix_templa= te =3D { }, =20 .ops =3D { + .prepare_desc =3D pci_msix_prepare_desc, .set_desc =3D pci_device_domain_set_desc, },