From patchwork Mon Nov 21 14:38:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 23840 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:f944:0:0:0:0:0 with SMTP id q4csp1633886wrr; Mon, 21 Nov 2022 06:52:00 -0800 (PST) X-Google-Smtp-Source: AA0mqf5z79/YWRwSW9BnMoO4OAIrvcRjZ0xtrO9WRs3CSRmZ0U07QJSjr/V9yBX5b4nvIneQENWD X-Received: by 2002:a17:902:e3ca:b0:189:870:ef5d with SMTP id r10-20020a170902e3ca00b001890870ef5dmr1751436ple.28.1669042320339; Mon, 21 Nov 2022 06:52:00 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1669042320; cv=none; d=google.com; s=arc-20160816; b=L5QNhQvCRa4Gu2mIIq/rnk/alfhBcxoFWGt/y3/2Smsr9dRYnaFqiZKL0dYOo5m1fl 8b5gP6gCytJ064Q3GVgfSSABCjyq6IErVotw2nx4LHtiZLtR4XWyWHPlrmoPlT43SeNI DiMDsOOqoThiqzKOVNyqXm7aBSDfgM/Qxx/YoC5C8/rB62ae0zeTqpbfVC2Jut+Kg+0o yUWy/LbpMQF/pnfrWhUuk47zru8LWnLy1AuisXRKcyKMLhNvt6SYQng6LUsZnM3Wh4x6 ok+xOs01oqMS1bZZG1WA8nw4xMbAfFwioqJFVCOh8mThUbtFPeVfktl9d3w3jwgdlAjh 0/Rg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:date:mime-version:references:subject:cc:to:from :dkim-signature:dkim-signature:message-id; bh=oTFonI9s2+7/R67swuFjwyJq+l+zO53FG0LUQy4ZgBs=; b=sZjL/Wo+5GEtQhrNJRz+aDD0bq5EaRNe+DQ/LrgyJOzPpJzps376JD3PVosriVokgv PA8ZOxFc+yMxtJ4ySy2UDpHBXiH8MtEB/nkzY3gf3oZFw5ann109h8OZopwnd9xxWap9 9AgpBpdI4voRGqejk/qN6meqPlx7RFxL5kUdX2JIcaDOaH+qlcrraGhQ835eEOs/oxVo PDsGFqqrAMKxT5GuqIPCPbvtA8KCXCuhjkyziDHkT2sw/+Qu/ori2uTFHTShKyz4MLcD eBU9CQzYyBxOh/If4VEyRjxrToWm84Std8MaT2OqR55v3fdF/HEZ2P/IOxVnlcl2A1Ri q9xA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linutronix.de header.s=2020 header.b=mjRAE9vH; dkim=neutral (no key) header.i=@linutronix.de header.s=2020e header.b=iG9q5JtZ; 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: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id e2-20020aa78242000000b005633766252asi10592428pfn.313.2022.11.21.06.51.46; Mon, 21 Nov 2022 06:52:00 -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=mjRAE9vH; dkim=neutral (no key) header.i=@linutronix.de header.s=2020e header.b=iG9q5JtZ; 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 S231929AbiKUOlW (ORCPT + 99 others); Mon, 21 Nov 2022 09:41:22 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49364 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231330AbiKUOjO (ORCPT ); Mon, 21 Nov 2022 09:39:14 -0500 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 067A5C8CA4; Mon, 21 Nov 2022 06:38:23 -0800 (PST) Message-ID: <20221121091328.078449899@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1669041502; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=oTFonI9s2+7/R67swuFjwyJq+l+zO53FG0LUQy4ZgBs=; b=mjRAE9vHso4a6W9Xodl04Js6/meJynxAfTVudocXC11HSo0MKcFfikTU0udFb60x4JnDiG fED3uoOmA1MY7G1C5yU/qtH1Jb315cR8jhj1b0EhDEBwUye/ieoCLXz4YhbXA1IxfN+lMk SkSb5FhZ/Y2yi3irhYltZWdoNTVifGnqXORmrR2i9/CeAl++w/2Cd9Nmvr2L/bcjXNTDmG UjwGX6DVQi2YC9kxUf5IYp/rV/eUkdhEGQvQq8xKW58n0QacKIita8DeksyKJ4+IUDBS4G WIy11i//Q2fM1FBkVV2AaWeuxbGXssnZ7wiJuciQ5qDntl1SQiNacqqldhZxgQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1669041502; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=oTFonI9s2+7/R67swuFjwyJq+l+zO53FG0LUQy4ZgBs=; b=iG9q5JtZdxyDYLgcIYoaNSVasOHl0ONiqrMnhCZEUgyWtrMhUrEQLFd11pXR1YbuTQ34og eov3F28TNsZedNBg== From: Thomas Gleixner To: LKML Cc: x86@kernel.org, Joerg Roedel , Will Deacon , linux-pci@vger.kernel.org, Bjorn Helgaas , Lorenzo Pieralisi , Marc Zyngier , Greg Kroah-Hartman , Jason Gunthorpe , Dave Jiang , Alex Williamson , Kevin Tian , Dan Williams , Logan Gunthorpe , Ashok Raj , Jon Mason , Allen Hubbe Subject: [patch V2 29/33] PCI/MSI: Provide pci_ims_alloc/free_irq() References: <20221121083657.157152924@linutronix.de> MIME-Version: 1.0 Date: Mon, 21 Nov 2022 15:38:22 +0100 (CET) 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: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1750117719771135164?= X-GMAIL-MSGID: =?utf-8?q?1750117719771135164?= Single vector allocation which allocates the next free index in the IMS space. The free function releases. All allocated vectors are released also via pci_free_vectors() which is also releasing MSI/MSI-X vectors. Signed-off-by: Thomas Gleixner Acked-by: Bjorn Helgaas --- drivers/pci/msi/api.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++ include/linux/pci.h | 3 +++ 2 files changed, 53 insertions(+) --- a/drivers/pci/msi/api.c +++ b/drivers/pci/msi/api.c @@ -361,6 +361,56 @@ const struct cpumask *pci_irq_get_affini EXPORT_SYMBOL(pci_irq_get_affinity); /** + * pci_ims_alloc_irq - Allocate an interrupt on a PCI/IMS interrupt domain + * @dev: The PCI device to operate on + * @icookie: Pointer to an IMS implementation specific cookie for this + * IMS instance (PASID, queue ID, pointer...). + * The cookie content is copied into the MSI descriptor for the + * interrupt chip callbacks or domain specific setup functions. + * @affdesc: Optional pointer to an interrupt affinity descriptor + * + * There is no index for IMS allocations as IMS is an implementation + * specific storage and does not have any direct associations between + * index, which might be a pure software construct, and device + * functionality. This association is established by the driver either via + * the index - if there is a hardware table - or in case of purely software + * managed IMS implementation the association happens via the + * irq_write_msi_msg() callback of the implementation specific interrupt + * chip, which utilizes the provided @cookie to store the MSI message in + * the appropriate place. + * + * Return: A struct msi_map + * + * On success msi_map::index contains the allocated index (>= 0) and + * msi_map::virq the allocated Linux interrupt number (> 0). + * + * On fail msi_map::index contains the error code and msi_map::virq + * is set to 0. + */ +struct msi_map pci_ims_alloc_irq(struct pci_dev *dev, union msi_instance_cookie *icookie, + const struct irq_affinity_desc *affdesc) +{ + return msi_domain_alloc_irq_at(&dev->dev, MSI_SECONDARY_DOMAIN, MSI_ANY_INDEX, + affdesc, icookie); +} +EXPORT_SYMBOL_GPL(pci_ims_alloc_irq); + +/** + * pci_ims_free_irq - Allocate an interrupt on a PCI/IMS interrupt domain + * which was allocated via pci_ims_alloc_irq() + * @dev: The PCI device to operate on + * @map: A struct msi_map describing the interrupt to free as + * returned from pci_ims_alloc_irq() + */ +void pci_ims_free_irq(struct pci_dev *dev, struct msi_map map) +{ + if (WARN_ON_ONCE(map.index < 0 || !map.virq)) + return; + msi_domain_free_irqs_range(&dev->dev, MSI_SECONDARY_DOMAIN, map.index, map.index); +} +EXPORT_SYMBOL_GPL(pci_ims_free_irq); + +/** * pci_free_irq_vectors() - Free previously allocated IRQs for a device * @dev: the PCI device to operate on * --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -2491,6 +2491,9 @@ struct msi_domain_template; bool pci_create_ims_domain(struct pci_dev *pdev, const struct msi_domain_template *template, unsigned int hwsize, void *data); +struct msi_map pci_ims_alloc_irq(struct pci_dev *pdev, union msi_instance_cookie *icookie, + const struct irq_affinity_desc *affdesc); +void pci_ims_free_irq(struct pci_dev *pdev, struct msi_map map); #include