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[2620:137:e000::1:20]) by mx.google.com with ESMTP id v27-20020a63465b000000b00477a5b7d52asi14824835pgk.607.2022.12.05.13.45.52; Mon, 05 Dec 2022 13:46:06 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@linutronix.de header.s=2020 header.b=lFtylxne; dkim=neutral (no key) header.i=@linutronix.de header.s=2020e header.b="F2/1RzWZ"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=linutronix.de Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233804AbiLEVme (ORCPT <rfc822;jaysivo@gmail.com> + 99 others); Mon, 5 Dec 2022 16:42:34 -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 <rfc822;linux-kernel@vger.kernel.org>); 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" <tip-bot2@linutronix.de> 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 <tglx@linutronix.de>, Jason Gunthorpe <jgg@nvidia.com>, Kevin Tian <kevin.tian@intel.com>, Bjorn Helgaas <bhelgaas@google.com>, Marc Zyngier <maz@kernel.org>, 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: <tip-bot2@linutronix.de> Robot-Unsubscribe: Contact <mailto:tglx@linutronix.de> to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: <linux-kernel.vger.kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1750426022928142676?= X-GMAIL-MSGID: =?utf-8?q?1751412130930509580?= |
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[tip:,irq/core] PCI/MSI: Provide prepare_desc() MSI domain op
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Commit Message
tip-bot2 for Thomas Gleixner
Dec. 5, 2022, 9:41 p.m. UTC
The following commit has been merged into the irq/core branch of tip: Commit-ID: 73bd063ca03493f44e0700cc08824093da9741bc Gitweb: https://git.kernel.org/tip/73bd063ca03493f44e0700cc08824093da9741bc Author: Thomas Gleixner <tglx@linutronix.de> AuthorDate: Fri, 25 Nov 2022 00:26:23 +01:00 Committer: Thomas Gleixner <tglx@linutronix.de> 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 <tglx@linutronix.de> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Kevin Tian <kevin.tian@intel.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Marc Zyngier <maz@kernel.org> 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)); } +static void pci_msix_prepare_desc(struct irq_domain *domain, msi_alloc_info_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 = { .chip = { .name = "PCI-MSIX", @@ -212,6 +220,7 @@ static const struct msi_domain_template pci_msix_template = { }, .ops = { + .prepare_desc = pci_msix_prepare_desc, .set_desc = pci_device_domain_set_desc, },