powerpc/eeh: Debugfs for error injection
The patch creates debugfs entries (powerpc/PCIxxxx/err_injct) for
injecting EEH errors for testing purpose.
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/platforms/powernv/eeh-ioda.c b/arch/powerpc/platforms/powernv/eeh-ioda.c
index 2b7689e..84f3036 100644
--- a/arch/powerpc/platforms/powernv/eeh-ioda.c
+++ b/arch/powerpc/platforms/powernv/eeh-ioda.c
@@ -12,6 +12,7 @@
*/
#include <linux/bootmem.h>
+#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/io.h>
@@ -64,6 +65,29 @@
.priority = 0
};
+#ifdef CONFIG_DEBUG_FS
+static int ioda_eeh_dbgfs_set(void *data, u64 val)
+{
+ struct pci_controller *hose = data;
+ struct pnv_phb *phb = hose->private_data;
+
+ out_be64(phb->regs + 0xD10, val);
+ return 0;
+}
+
+static int ioda_eeh_dbgfs_get(void *data, u64 *val)
+{
+ struct pci_controller *hose = data;
+ struct pnv_phb *phb = hose->private_data;
+
+ *val = in_be64(phb->regs + 0xD10);
+ return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(ioda_eeh_dbgfs_ops, ioda_eeh_dbgfs_get,
+ ioda_eeh_dbgfs_set, "0x%llx\n");
+#endif /* CONFIG_DEBUG_FS */
+
/**
* ioda_eeh_post_init - Chip dependent post initialization
* @hose: PCI controller
@@ -101,6 +125,13 @@
}
}
+#ifdef CONFIG_DEBUG_FS
+ if (phb->dbgfs)
+ debugfs_create_file("err_injct", 0600,
+ phb->dbgfs, hose,
+ &ioda_eeh_dbgfs_ops);
+#endif
+
phb->eeh_enabled = 1;
}