From patchwork Mon Dec 6 22:27:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 12659901 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 33DAAC43219 for ; Mon, 6 Dec 2021 22:28:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1357481AbhLFWbx (ORCPT ); Mon, 6 Dec 2021 17:31:53 -0500 Received: from Galois.linutronix.de ([193.142.43.55]:46106 "EHLO galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1357140AbhLFWbX (ORCPT ); Mon, 6 Dec 2021 17:31:23 -0500 Message-ID: <20211206210224.763574089@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1638829671; 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=yrY1ZB0NumM3iY3b+dL6tdvji5YdLo8YZzow0Pc98K0=; b=yogWCLClZ5HawXr86pUvSu27UdiujY09fLCr9qODZ6WHG6tdy1jo4R5oUed+NZBlb4D+aL 7QpxacnGafJnNFuGA3Qr4uuaCUoNpqcC0RQIn/nv2i/ZqqOPRpDk41N3evYyZcNUIORUqQ RmyJmVXQ4SgC9OEaoFrfssQoJ8Xwn+4ZyexyySLnXH1jXW3w7H7gjCvNcp6z/9YZb3iZef SnjRI8A4v1jtxW1cvkAQLxfhlEO0mCCMG5y3BXvNH9MRSgIaMFqX4JKVHvpx5vMHBoS0Bb XHborQKOUtJXUnqPXT77WiZSbh3UWDmLFWdvo+NEVEOm05/Ol4MBGoFkTWQRhw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1638829671; 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=yrY1ZB0NumM3iY3b+dL6tdvji5YdLo8YZzow0Pc98K0=; b=xWk0QhW9rvUKaVhvOUrP23TOY6t2RbQv3eb8/ILfXzb+qQTtu1Dgw8jDLlkSfce65pUPAy AUFj7t7KeK1aKUCQ== From: Thomas Gleixner To: LKML Cc: Bjorn Helgaas , Marc Zygnier , Alex Williamson , Kevin Tian , Jason Gunthorpe , Megha Dey , Ashok Raj , linux-pci@vger.kernel.org, Cedric Le Goater , Juergen Gross , Michael Ellerman , Paul Mackerras , Benjamin Herrenschmidt , linuxppc-dev@lists.ozlabs.org, Thomas Bogendoerfer , linux-mips@vger.kernel.org, Kalle Valo , Greg Kroah-Hartman , sparclinux@vger.kernel.org, x86@kernel.org, xen-devel@lists.xenproject.org, ath11k@lists.infradead.org, Wei Liu , linux-hyperv@vger.kernel.org, Christian Borntraeger , Heiko Carstens Subject: [patch V2 17/23] PCI/MSI: Split out !IRQDOMAIN code References: <20211206210147.872865823@linutronix.de> MIME-Version: 1.0 Date: Mon, 6 Dec 2021 23:27:51 +0100 (CET) Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org Split out the non irqdomain code into its own file. Signed-off-by: Thomas Gleixner Tested-by: Juergen Gross Reviewed-by: Jason Gunthorpe Reviewed-by: Greg Kroah-Hartman Acked-by: Bjorn Helgaas --- V2: Add proper includes and fix variable name - Cedric --- drivers/pci/msi/Makefile | 5 ++-- drivers/pci/msi/legacy.c | 52 +++++++++++++++++++++++++++++++++++++++++++++++ drivers/pci/msi/msi.c | 46 ----------------------------------------- 3 files changed, 55 insertions(+), 48 deletions(-) --- a/drivers/pci/msi/Makefile +++ b/drivers/pci/msi/Makefile @@ -1,5 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 # # Makefile for the PCI/MSI -obj-$(CONFIG_PCI) += pcidev_msi.o -obj-$(CONFIG_PCI_MSI) += msi.o +obj-$(CONFIG_PCI) += pcidev_msi.o +obj-$(CONFIG_PCI_MSI) += msi.o +obj-$(CONFIG_PCI_MSI_ARCH_FALLBACKS) += legacy.o --- /dev/null +++ b/drivers/pci/msi/legacy.c @@ -0,0 +1,52 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * PCI Message Signaled Interrupt (MSI). + * + * Legacy architecture specific setup and teardown mechanism. + */ +#include +#include + +/* Arch hooks */ +int __weak arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc) +{ + return -EINVAL; +} + +void __weak arch_teardown_msi_irq(unsigned int irq) +{ +} + +int __weak arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) +{ + struct msi_desc *desc; + int ret; + + /* + * If an architecture wants to support multiple MSI, it needs to + * override arch_setup_msi_irqs() + */ + if (type == PCI_CAP_ID_MSI && nvec > 1) + return 1; + + for_each_pci_msi_entry(desc, dev) { + ret = arch_setup_msi_irq(dev, desc); + if (ret) + return ret < 0 ? ret : -ENOSPC; + } + + return 0; +} + +void __weak arch_teardown_msi_irqs(struct pci_dev *dev) +{ + struct msi_desc *desc; + int i; + + for_each_pci_msi_entry(desc, dev) { + if (desc->irq) { + for (i = 0; i < desc->nvec_used; i++) + arch_teardown_msi_irq(desc->irq + i); + } + } +} --- a/drivers/pci/msi/msi.c +++ b/drivers/pci/msi/msi.c @@ -50,52 +50,6 @@ static void pci_msi_teardown_msi_irqs(st #define pci_msi_teardown_msi_irqs arch_teardown_msi_irqs #endif -#ifdef CONFIG_PCI_MSI_ARCH_FALLBACKS -/* Arch hooks */ -int __weak arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc) -{ - return -EINVAL; -} - -void __weak arch_teardown_msi_irq(unsigned int irq) -{ -} - -int __weak arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) -{ - struct msi_desc *entry; - int ret; - - /* - * If an architecture wants to support multiple MSI, it needs to - * override arch_setup_msi_irqs() - */ - if (type == PCI_CAP_ID_MSI && nvec > 1) - return 1; - - for_each_pci_msi_entry(entry, dev) { - ret = arch_setup_msi_irq(dev, entry); - if (ret < 0) - return ret; - if (ret > 0) - return -ENOSPC; - } - - return 0; -} - -void __weak arch_teardown_msi_irqs(struct pci_dev *dev) -{ - int i; - struct msi_desc *entry; - - for_each_pci_msi_entry(entry, dev) - if (entry->irq) - for (i = 0; i < entry->nvec_used; i++) - arch_teardown_msi_irq(entry->irq + i); -} -#endif /* CONFIG_PCI_MSI_ARCH_FALLBACKS */ - /* * PCI 2.3 does not specify mask bits for each MSI interrupt. Attempting to * mask all MSI interrupts by clearing the MSI enable bit does not work