Patchwork [31/31] powerpc/eeh: Debugfs for error injection

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Submitter Gavin Shan
Date June 20, 2013, 5:21 a.m.
Message ID <1371705681-24632-32-git-send-email-shangw@linux.vnet.ibm.com>
Download mbox | patch
Permalink /patch/252747/
State Accepted, archived
Headers show

Comments

Gavin Shan - June 20, 2013, 5:21 a.m.
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>
---
 arch/powerpc/platforms/powernv/eeh-ioda.c |   31 +++++++++++++++++++++++++++++
 1 files changed, 31 insertions(+), 0 deletions(-)

Patch

diff --git a/arch/powerpc/platforms/powernv/eeh-ioda.c b/arch/powerpc/platforms/powernv/eeh-ioda.c
index 4961270..4287652 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>
@@ -50,6 +51,29 @@  static void ioda_eeh_event(u64 events)
 		eeh_send_failure_event(NULL);
 }
 
+#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
@@ -84,6 +108,13 @@  static int ioda_eeh_post_init(struct pci_controller *hose)
 			}
 		}
 
+#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;
 	}