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path: root/drivers/pci/host/pci-keystone-dw.c
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Diffstat (limited to 'drivers/pci/host/pci-keystone-dw.c')
-rw-r--r--drivers/pci/host/pci-keystone-dw.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/pci/host/pci-keystone-dw.c b/drivers/pci/host/pci-keystone-dw.c
index 6153853ca9c3..41515092eb0d 100644
--- a/drivers/pci/host/pci-keystone-dw.c
+++ b/drivers/pci/host/pci-keystone-dw.c
@@ -14,6 +14,7 @@
#include <linux/irq.h>
#include <linux/irqdomain.h>
+#include <linux/irqreturn.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_pci.h>
@@ -53,6 +54,21 @@
#define IRQ_STATUS 0x184
#define MSI_IRQ_OFFSET 4
+/* Error IRQ bits */
+#define ERR_AER BIT(5) /* ECRC error */
+#define ERR_AXI BIT(4) /* AXI tag lookup fatal error */
+#define ERR_CORR BIT(3) /* Correctable error */
+#define ERR_NONFATAL BIT(2) /* Non-fatal error */
+#define ERR_FATAL BIT(1) /* Fatal error */
+#define ERR_SYS BIT(0) /* System (fatal, non-fatal, or correctable) */
+#define ERR_IRQ_ALL (ERR_AER | ERR_AXI | ERR_CORR | \
+ ERR_NONFATAL | ERR_FATAL | ERR_SYS)
+#define ERR_FATAL_IRQ (ERR_FATAL | ERR_AXI)
+#define ERR_IRQ_STATUS_RAW 0x1c0
+#define ERR_IRQ_STATUS 0x1c4
+#define ERR_IRQ_ENABLE_SET 0x1c8
+#define ERR_IRQ_ENABLE_CLR 0x1cc
+
/* Config space registers */
#define DEBUG0 0x728
@@ -243,6 +259,28 @@ void ks_dw_pcie_handle_legacy_irq(struct keystone_pcie *ks_pcie, int offset)
writel(offset, ks_pcie->va_app_base + IRQ_EOI);
}
+void ks_dw_pcie_enable_error_irq(void __iomem *reg_base)
+{
+ writel(ERR_IRQ_ALL, reg_base + ERR_IRQ_ENABLE_SET);
+}
+
+irqreturn_t ks_dw_pcie_handle_error_irq(struct device *dev,
+ void __iomem *reg_base)
+{
+ u32 status;
+
+ status = readl(reg_base + ERR_IRQ_STATUS_RAW) & ERR_IRQ_ALL;
+ if (!status)
+ return IRQ_NONE;
+
+ if (status & ERR_FATAL_IRQ)
+ dev_err(dev, "fatal error (status %#010x)\n", status);
+
+ /* Ack the IRQ; status bits are RW1C */
+ writel(status, reg_base + ERR_IRQ_STATUS);
+ return IRQ_HANDLED;
+}
+
static void ks_dw_pcie_ack_legacy_irq(struct irq_data *d)
{
}