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

[Yijing Wang <wangyijing@xxxxxxxxxx>]

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@xxxxxxxxxx>
---
 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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