linux-kernel - [RFC PATCH 15/20] s390/MSI: Use msi_chip instead of arch func to configure MSI/MSI-X

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Date:	Tue, 12 Aug 2014 15:26:08 +0800
From:	Yijing Wang <wangyijing@...wei.com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
CC:	<linux-kernel@...r.kernel.org>, Xinwei Hu <huxinwei@...wei.com>,
	Wuyun <wuyun.wu@...wei.com>, <linux-pci@...r.kernel.org>,
	Marc Zyngier <marc.zyngier@....com>,
	<linux-arm-kernel@...ts.infradead.org>,
	Russell King <linux@....linux.org.uk>,
	<arnab.basu@...escale.com>, <x86@...nel.org>,
	"Arnd Bergmann" <arnd@...db.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	<xen-devel@...ts.xenproject.org>, Joerg Roedel <joro@...tes.org>,
	<iommu@...ts.linux-foundation.org>, <linux-mips@...ux-mips.org>,
	"Benjamin Herrenschmidt" <benh@...nel.crashing.org>,
	<linuxppc-dev@...ts.ozlabs.org>, <linux-s390@...r.kernel.org>,
	Sebastian Ott <sebott@...ux.vnet.ibm.com>,
	"Tony Luck" <tony.luck@...el.com>, <linux-ia64@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	<sparclinux@...r.kernel.org>, Chris Metcalf <cmetcalf@...era.com>,
	Yijing Wang <wangyijing@...wei.com>
Subject: [RFC PATCH 15/20] s390/MSI: Use msi_chip instead of arch func to configure MSI/MSI-X

Introduce a new struct msi_chip zpci_msi_chip instead of weak arch
functions to configure MSI/MSI-X.

Signed-off-by: Yijing Wang <wangyijing@...wei.com>
---
 arch/s390/pci/pci.c |   16 ++++++++++++++--
 1 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index 9ddc51e..ee7b05c 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -398,8 +398,9 @@ static void zpci_irq_handler(struct airq_struct *airq)
 	}
 }
 
-int arch_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
+int zpci_setup_msi_irqs(struct device *dev, int nvec, int type)
 {
+	struct pci_dev *pdev = to_pci_dev(dev);
 	struct zpci_dev *zdev = get_zdev(pdev);
 	unsigned int hwirq, msi_vecs;
 	unsigned long aisb;
@@ -474,8 +475,9 @@ out:
 	return rc;
 }
 
-void arch_teardown_msi_irqs(struct pci_dev *pdev)
+void zpci_teardown_msi_irqs(struct device *dev)
 {
+	struct pci_dev *pdev = to_pci_dev(dev);
 	struct zpci_dev *zdev = get_zdev(pdev);
 	struct msi_desc *msi;
 	int rc;
@@ -501,6 +503,16 @@ void arch_teardown_msi_irqs(struct pci_dev *pdev)
 	airq_iv_free_bit(zpci_aisb_iv, zdev->aisb);
 }
 
+struct msi_chip zpci_msi_chip = {
+	.setup_irqs = zpci_setup_msi_irqs,
+	.teardown_irqs = zpci_teardown_msi_irqs,
+};
+
+struct msi_chip *arch_get_match_msi_chip(struct device *dev)
+{
+	return &zpci_msi_chip;
+}
+
 static void zpci_map_resources(struct zpci_dev *zdev)
 {
 	struct pci_dev *pdev = zdev->pdev;
-- 
1.7.1

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