From nobody Thu Sep 18 14:11:36 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 D79C9C4321E for ; Mon, 5 Dec 2022 18:25:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233028AbiLESZv (ORCPT ); Mon, 5 Dec 2022 13:25:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39470 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232261AbiLESZQ (ORCPT ); Mon, 5 Dec 2022 13:25:16 -0500 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 59F0D20BD2; Mon, 5 Dec 2022 10:25:15 -0800 (PST) Date: Mon, 05 Dec 2022 18:25:11 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1670264712; 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=QpCdO9FRNd4C/C92Gqyt7WAp0J4mSYopV4Hm0MGrgoo=; b=DhATBISCsw7QKP2FQPEOfaMkle/6b7cCUotOpy1wIRGuu0bfq7gRVSE7vLRCHdomYU0DhK DV2Soo9/TJbYG/y/Z7BdQyo9V+2urbRswIQ6LisRXSiGrfEbYGmH6XH2koezFOXe2mvE2l 1g0wMljHrYsxWn58sWXb47nlIG3yh9IdXnoymZOTUWyYAZdSs1N8COE+18ZbgnoutYuLwt dBinsB0YoIZRKZBP5R75WF0mk/Rr/mS7ZjZ+MOO8/bGADGe8cuuSkFarSM230Mds3EKKzM PZ6+ufon0Zo16X4hH35mJBCEuXDod2G5eOwPyLAfkDKfTwlAYShmXoWP5WRd1w== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1670264712; 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=QpCdO9FRNd4C/C92Gqyt7WAp0J4mSYopV4Hm0MGrgoo=; b=ELKW/XRRhUWM0vSlMDajJJKW+gO81rAy1NR7shRYH38Zgua+BA/8IhxWeVY/oYa27HkxRv JTqys2gUecRCmYCg== 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: <167026471199.4906.4942492414600624989.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: d9abbfee95e4a80dfbdf7030d0541a315ee2879b Gitweb: https://git.kernel.org/tip/d9abbfee95e4a80dfbdf7030d0541a315= ee2879b Author: Thomas Gleixner AuthorDate: Fri, 25 Nov 2022 00:26:23 +01:00 Committer: Thomas Gleixner CommitterDate: Mon, 05 Dec 2022 19:21:04 +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, },