From patchwork Sat Nov 27 01:19:01 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 12642021 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 lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 63932C433F5 for ; Sat, 27 Nov 2021 01:27:23 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.233668.405703 (Exim 4.92) (envelope-from ) id 1mqmUl-0006XH-Kb; Sat, 27 Nov 2021 01:27:15 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 233668.405703; Sat, 27 Nov 2021 01:27:15 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1mqmUk-0006Ua-P3; Sat, 27 Nov 2021 01:27:14 +0000 Received: by outflank-mailman (input) for mailman id 233668; Sat, 27 Nov 2021 01:27:13 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1mqmMt-00020H-Vk for xen-devel@lists.xenproject.org; Sat, 27 Nov 2021 01:19:07 +0000 Received: from galois.linutronix.de (galois.linutronix.de [2a0a:51c0:0:12e:550::1]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id 01874d72-4f20-11ec-9787-a32c541c8605; Sat, 27 Nov 2021 02:19:02 +0100 (CET) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 01874d72-4f20-11ec-9787-a32c541c8605 Message-ID: <20211126223825.093887718@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1637975941; 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=Fm5t3j//2ZJWIAwQC/lUTYq1h7igaXJ6yKKmISA8BnE=; b=YXrvDdjinCV1yBjHyHLHh4kbucu2LHURHR+t0zVJv5Iwe67q0LFuruaQh3vkwbzQtPwio7 pprtMrfRvledbc2Kp38dfn11v4y5Inu453zNnn62UbDXbEMDnzTVB2lG+F7/o751ne62V0 wuLwIsQnEtadtEUUBTR+POd7nVjDpAaMG5nsqWghfqGryom7R0YB/K06iimvmxsJ5KiFpB JPV3B+r8CqqTRE3oo30uaAVzGJqzMsu2Bz/vPrVyNZToyYv3yqNeZE81QSacrNZkpZTNFS XGAAgWOht7wVhoHHI0patyvWHbhFxyJn+zFlcFj6JBZ8L2lsCdtihTsPXR9eTg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1637975941; 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=Fm5t3j//2ZJWIAwQC/lUTYq1h7igaXJ6yKKmISA8BnE=; b=RvZm8oUXbruNEue8m0QI5IgMFXDCNY3ru8yRX0pyG3paqWiHR2a2l+sKosxSZ9wf0ryS/Q OiKV6WwXAMjbYnDg== 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, Michael Ellerman , Paul Mackerras , Benjamin Herrenschmidt , linuxppc-dev@lists.ozlabs.org, Thomas Bogendoerfer , linux-mips@vger.kernel.org, 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, Juergen Gross , Christian Borntraeger , Heiko Carstens Subject: [patch 17/22] PCI/MSI: Split out !IRQDOMAIN code References: <20211126222700.862407977@linutronix.de> MIME-Version: 1.0 Date: Sat, 27 Nov 2021 02:19:01 +0100 (CET) Split out the non irqdomain code into its own file. Signed-off-by: Thomas Gleixner --- drivers/pci/msi/Makefile | 5 ++-- drivers/pci/msi/legacy.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++ drivers/pci/msi/msi.c | 46 ------------------------------------------ 3 files changed, 54 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 +1,51 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * PCI Message Signaled Interrupt (MSI). + * + * Legacy architecture specific setup and teardown mechanism. + */ +#include "msi.h" + +/* 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 < entry->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