linux-kernel - [PATCH v3 25/27] Sparc/MSI: Use MSI chip framework to configure MSI/MSI-X irq

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Date:	Wed, 15 Oct 2014 11:07:13 +0800
From:	Yijing Wang <wangyijing@...wei.com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
CC:	<linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Xinwei Hu <huxinwei@...wei.com>, Wuyun <wuyun.wu@...wei.com>,
	<linux-arm-kernel@...ts.infradead.org>,
	Russell King <linux@....linux.org.uk>,
	<linux-arch@...r.kernel.org>, <arnab.basu@...escale.com>,
	<Bharat.Bhushan@...escale.com>, <x86@...nel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	"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>,
	Ralf Baechle <ralf@...ux-mips.org>,
	Lucas Stach <l.stach@...gutronix.de>,
	David Vrabel <david.vrabel@...rix.com>,
	"Sergei Shtylyov" <sergei.shtylyov@...entembedded.com>,
	Michael Ellerman <mpe@...erman.id.au>,
	Thierry Reding <thierry.reding@...il.com>,
	"Thomas Petazzoni" <thomas.petazzoni@...e-electrons.com>,
	Liviu Dudau <liviu@...au.co.uk>,
	Yijing Wang <wangyijing@...wei.com>
Subject: [PATCH v3 25/27] Sparc/MSI: Use MSI chip framework to configure MSI/MSI-X irq

Use MSI chip framework instead of arch MSI functions to configure
MSI/MSI-X irq. So we can manage MSI/MSI-X irq in a unified framework.

Signed-off-by: Yijing Wang <wangyijing@...wei.com>
---
 arch/sparc/kernel/pci.c      |   14 ++++++++++++--
 arch/sparc/kernel/pci_impl.h |   12 ++++++++++++
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
index b36365f..a46a148 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -656,6 +656,9 @@ struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,
 
 	printk("PCI: Scanning PBM %s\n", node->full_name);
 
+#ifdef CONFIG_PCI_MSI
+	pbm->msi_chip = &sparc_msi_chip;
+#endif
 	pci_add_resource_offset(&resources, &pbm->io_space,
 				pbm->io_space.start);
 	pci_add_resource_offset(&resources, &pbm->mem_space,
@@ -905,7 +908,8 @@ int pci_domain_nr(struct pci_bus *pbus)
 EXPORT_SYMBOL(pci_domain_nr);
 
 #ifdef CONFIG_PCI_MSI
-int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
+static int sparc_setup_msi_irq(struct msi_chip *chip,
+		struct pci_dev *pdev, struct msi_desc *desc)
 {
 	struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
 	unsigned int irq;
@@ -916,7 +920,7 @@ int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
 	return pbm->setup_msi_irq(&irq, pdev, desc);
 }
 
-void arch_teardown_msi_irq(unsigned int irq)
+static void sparc_teardown_msi_irq(struct msi_chip *chip, unsigned int irq)
 {
 	struct msi_desc *entry = irq_get_msi_desc(irq);
 	struct pci_dev *pdev = entry->dev;
@@ -925,6 +929,12 @@ void arch_teardown_msi_irq(unsigned int irq)
 	if (pbm->teardown_msi_irq)
 		pbm->teardown_msi_irq(irq, pdev);
 }
+
+struct msi_chip sparc_msi_chip = {
+	.setup_irq = sparc_setup_msi_irq,
+	.teardown_irq = sparc_teardown_msi_irq,
+};
+
 #endif /* !(CONFIG_PCI_MSI) */
 
 static void ali_sound_dma_hack(struct pci_dev *pdev, int set_bit)
diff --git a/arch/sparc/kernel/pci_impl.h b/arch/sparc/kernel/pci_impl.h
index 75803c7..073bb4e 100644
--- a/arch/sparc/kernel/pci_impl.h
+++ b/arch/sparc/kernel/pci_impl.h
@@ -55,6 +55,8 @@ struct sparc64_msiq_cookie {
 	struct pci_pbm_info *pbm;
 	unsigned long msiqid;
 };
+
+extern struct msi_chip sparc_msi_chip;
 #endif
 
 struct pci_pbm_info {
@@ -132,6 +134,7 @@ struct pci_pbm_info {
 	void				*msi_queues;
 	unsigned long			*msi_bitmap;
 	unsigned int			*msi_irq_table;
+	struct msi_chip *msi_chip;
 	int (*setup_msi_irq)(unsigned int *irq_p, struct pci_dev *pdev,
 			     struct msi_desc *entry);
 	void (*teardown_msi_irq)(unsigned int irq, struct pci_dev *pdev);
@@ -153,6 +156,15 @@ struct pci_pbm_info {
 	int				numa_node;
 };
 
+#ifdef CONFIG_PCI_MSI
+static inline struct msi_chip *pci_msi_chip(struct pci_bus *bus)
+{
+	struct pci_pbm_info *pbm = bus->sysdata;
+
+	return pbm->msi_chip;
+}
+#endif
+
 extern struct pci_pbm_info *pci_pbm_root;
 
 extern int pci_num_pbms;
-- 
1.7.1

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