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PCI: keystone: Add error IRQ handler

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Keystone PCI hardware generates error interrupts at RC using a platform IRQ
instead of a standard MSI or legacy IRQ.  Add a simple error handler that
logs the fatal interrupt status to the console.

[bhelgaas: s/node/dev->of_node/, tidy comments, return irqreturn_t directly]
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rob Herring <robh@kernel.org>
CC: Pawel Moll <pawel.moll@arm.com>
CC: Mark Rutland <mark.rutland@arm.com>
CC: Ian Campbell <ijc+devicetree@hellion.org.uk>
CC: Kumar Gala <galak@codeaurora.org>
This commit is contained in:
Murali Karicheri
2016-04-11 10:50:30 -04:00
committed by Bjorn Helgaas
parent 9735a22799
commit 025dd3daed
4 changed files with 74 additions and 0 deletions
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6
drivers/pci/host/pci-keystone.h
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@@ -29,6 +29,9 @@ struct keystone_pcie {
int msi_host_irqs[MAX_MSI_HOST_IRQS];
struct device_node *msi_intc_np;
struct irq_domain *legacy_irq_domain;
struct device_node *np;
int error_irq;
/* Application register space */
void __iomem *va_app_base;
@@ -42,6 +45,9 @@ phys_addr_t ks_dw_pcie_get_msi_addr(struct pcie_port *pp);
/* Keystone specific PCI controller APIs */
void ks_dw_pcie_enable_legacy_irqs(struct keystone_pcie *ks_pcie);
void ks_dw_pcie_handle_legacy_irq(struct keystone_pcie *ks_pcie, int offset);
void ks_dw_pcie_enable_error_irq(void __iomem *reg_base);
irqreturn_t ks_dw_pcie_handle_error_irq(struct device *dev,
void __iomem *reg_base);
int ks_dw_pcie_host_init(struct keystone_pcie *ks_pcie,
struct device_node *msi_intc_np);
int ks_dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,