[RFC PATCH 13/20] MIPS/xlr/MSI: Use msi_chip instead of arch func to configure MSI/MSI-X

[Yijing Wang]

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

Signed-off-by: Yijing Wang <wangyijing at huawei.com>
---
 arch/mips/pci/pci-xlr.c |   19 +++++++++++++++----
 1 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/arch/mips/pci/pci-xlr.c b/arch/mips/pci/pci-xlr.c
index 0dde803..6eef164 100644
--- a/arch/mips/pci/pci-xlr.c
+++ b/arch/mips/pci/pci-xlr.c
@@ -214,11 +214,11 @@ static int get_irq_vector(const struct pci_dev *dev)
 }
 
 #ifdef CONFIG_PCI_MSI
-void arch_teardown_msi_irq(unsigned int irq)
+void xlr_teardown_msi_irq(unsigned int irq)
 {
 }
 
-int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
+int xlr_setup_msi_irq(struct device *dev, struct msi_desc *desc)
 {
 	struct msi_msg msg;
 	struct pci_dev *lnk;
@@ -233,7 +233,7 @@ int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
 	 * Enable MSI on the XLS PCIe controller bridge which was disabled
 	 * at enumeration, the bridge MSI capability is at 0x50
 	 */
-	lnk = xls_get_pcie_link(dev);
+	lnk = xls_get_pcie_link(to_pci_dev(dev));
 	if (lnk == NULL)
 		return 1;
 
@@ -243,7 +243,7 @@ int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
 		pci_write_config_word(lnk, 0x50 + PCI_MSI_FLAGS, val);
 	}
 
-	irq = get_irq_vector(dev);
+	irq = get_irq_vector(to_pci_dev(dev));
 	if (irq <= 0)
 		return 1;
 
@@ -263,6 +263,17 @@ int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
 	write_msi_msg(irq, &msg);
 	return 0;
 }
+
+struct msi_chip xlr_msi_chip = {
+	.setup_irq = xlr_setup_msi_irq,
+	.teardown_irq = xlr_teardown_msi_irq,
+};
+
+struct msi_chip *arch_get_match_msi_chip(struct device *dev)
+{
+	return &xlr_msi_chip;
+}
+
 #endif
 
 /* Extra ACK needed for XLR on chip PCI controller */
-- 
1.7.1