The patch intends to add debugfs entry powerpc/EEH/PHBx so that
the administrator can inject EEH errors to specified PCI host
bridge for testing purpose.
Signed-off-by: Gavin Shan <sha...@linux.vnet.ibm.com>
---
arch/powerpc/platforms/powernv/eeh-ioda.c | 36 ++++++++++++++++++++++++++++-
1 files changed, 35 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/eeh-ioda.c
b/arch/powerpc/platforms/powernv/eeh-ioda.c
index ec5c524..4cc9db7 100644
--- a/arch/powerpc/platforms/powernv/eeh-ioda.c
+++ b/arch/powerpc/platforms/powernv/eeh-ioda.c
@@ -22,6 +22,7 @@
#include <linux/bootmem.h>
#include <linux/delay.h>
+#include <linux/debugfs.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/irq.h>
@@ -43,6 +44,29 @@
#include "powernv.h"
#include "pci.h"
+static struct dentry *ioda_eeh_dbgfs = NULL;
+
+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");
+
/**
* ioda_eeh_post_init - Chip dependent post initialization
* @hose: PCI controller
@@ -54,10 +78,20 @@
static int ioda_eeh_post_init(struct pci_controller *hose)
{
struct pnv_phb *phb = hose->private_data;
+ char name[16];
+
+ /* Create EEH debugfs root if possible */
+ if (!ioda_eeh_dbgfs)
+ ioda_eeh_dbgfs = debugfs_create_dir("EEH",
powerpc_debugfs_root);
/* FIXME: Enable it for PHB3 later */
- if (phb->type == PNV_PHB_IODA1)
+ if (phb->type == PNV_PHB_IODA1) {
+ sprintf(name, "PHB%d", hose->global_number);
+ debugfs_create_file(name, 0600, ioda_eeh_dbgfs,
+ hose, &ioda_eeh_dbgfs_ops);
+
phb->eeh_enabled = 1;
+ }
return 0;
}
--
1.7.5.4
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